samples/stepbystep.pl
src/5010001/regcomp.c
src/5010001/regexec.c
-src/5011000/regcomp.c
-src/5011000/regexec.c
-src/5011001/regcomp.c
-src/5011001/regexec.c
-src/5011002/regcomp.c
-src/5011002/regexec.c
-src/5011003/regcomp.c
-src/5011003/regexec.c
-src/5011004/regcomp.c
-src/5011004/regexec.c
-src/5011005/regcomp.c
-src/5011005/regexec.c
src/5012000/regcomp.c
src/5012000/regexec.c
src/5012001/regcomp.c
+++ /dev/null
-/* regcomp.c
- */
-
-/*
- * 'A fair jaw-cracker dwarf-language must be.' --Samwise Gamgee
- *
- * [p.285 of _The Lord of the Rings_, II/iii: "The Ring Goes South"]
- */
-
-/* This file contains functions for compiling a regular expression. See
- * also regexec.c which funnily enough, contains functions for executing
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_comp.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
-
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGCOMP_C
-#include "perl.h"
-
-#ifndef PERL_IN_XSUB_RE
-# include "INTERN.h"
-#endif
-
-#define REG_COMP_C
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#ifdef op
-#undef op
-#endif /* op */
-
-#ifdef MSDOS
-# if defined(BUGGY_MSC6)
- /* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */
-# pragma optimize("a",off)
- /* But MSC 6.00A is happy with 'w', for aliases only across function calls*/
-# pragma optimize("w",on )
-# endif /* BUGGY_MSC6 */
-#endif /* MSDOS */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-typedef struct RExC_state_t {
- U32 flags; /* are we folding, multilining? */
- char *precomp; /* uncompiled string. */
- REGEXP *rx_sv; /* The SV that is the regexp. */
- regexp *rx; /* perl core regexp structure */
- regexp_internal *rxi; /* internal data for regexp object pprivate field */
- char *start; /* Start of input for compile */
- char *end; /* End of input for compile */
- char *parse; /* Input-scan pointer. */
- I32 whilem_seen; /* number of WHILEM in this expr */
- regnode *emit_start; /* Start of emitted-code area */
- regnode *emit_bound; /* First regnode outside of the allocated space */
- regnode *emit; /* Code-emit pointer; ®dummy = don't = compiling */
- I32 naughty; /* How bad is this pattern? */
- I32 sawback; /* Did we see \1, ...? */
- U32 seen;
- I32 size; /* Code size. */
- I32 npar; /* Capture buffer count, (OPEN). */
- I32 cpar; /* Capture buffer count, (CLOSE). */
- I32 nestroot; /* root parens we are in - used by accept */
- I32 extralen;
- I32 seen_zerolen;
- I32 seen_evals;
- regnode **open_parens; /* pointers to open parens */
- regnode **close_parens; /* pointers to close parens */
- regnode *opend; /* END node in program */
- I32 utf8; /* whether the pattern is utf8 or not */
- I32 orig_utf8; /* whether the pattern was originally in utf8 */
- /* XXX use this for future optimisation of case
- * where pattern must be upgraded to utf8. */
- HV *charnames; /* cache of named sequences */
- HV *paren_names; /* Paren names */
-
- regnode **recurse; /* Recurse regops */
- I32 recurse_count; /* Number of recurse regops */
-#if ADD_TO_REGEXEC
- char *starttry; /* -Dr: where regtry was called. */
-#define RExC_starttry (pRExC_state->starttry)
-#endif
-#ifdef DEBUGGING
- const char *lastparse;
- I32 lastnum;
- AV *paren_name_list; /* idx -> name */
-#define RExC_lastparse (pRExC_state->lastparse)
-#define RExC_lastnum (pRExC_state->lastnum)
-#define RExC_paren_name_list (pRExC_state->paren_name_list)
-#endif
-} RExC_state_t;
-
-#define RExC_flags (pRExC_state->flags)
-#define RExC_precomp (pRExC_state->precomp)
-#define RExC_rx_sv (pRExC_state->rx_sv)
-#define RExC_rx (pRExC_state->rx)
-#define RExC_rxi (pRExC_state->rxi)
-#define RExC_start (pRExC_state->start)
-#define RExC_end (pRExC_state->end)
-#define RExC_parse (pRExC_state->parse)
-#define RExC_whilem_seen (pRExC_state->whilem_seen)
-#ifdef RE_TRACK_PATTERN_OFFSETS
-#define RExC_offsets (pRExC_state->rxi->u.offsets) /* I am not like the others */
-#endif
-#define RExC_emit (pRExC_state->emit)
-#define RExC_emit_start (pRExC_state->emit_start)
-#define RExC_emit_bound (pRExC_state->emit_bound)
-#define RExC_naughty (pRExC_state->naughty)
-#define RExC_sawback (pRExC_state->sawback)
-#define RExC_seen (pRExC_state->seen)
-#define RExC_size (pRExC_state->size)
-#define RExC_npar (pRExC_state->npar)
-#define RExC_nestroot (pRExC_state->nestroot)
-#define RExC_extralen (pRExC_state->extralen)
-#define RExC_seen_zerolen (pRExC_state->seen_zerolen)
-#define RExC_seen_evals (pRExC_state->seen_evals)
-#define RExC_utf8 (pRExC_state->utf8)
-#define RExC_orig_utf8 (pRExC_state->orig_utf8)
-#define RExC_charnames (pRExC_state->charnames)
-#define RExC_open_parens (pRExC_state->open_parens)
-#define RExC_close_parens (pRExC_state->close_parens)
-#define RExC_opend (pRExC_state->opend)
-#define RExC_paren_names (pRExC_state->paren_names)
-#define RExC_recurse (pRExC_state->recurse)
-#define RExC_recurse_count (pRExC_state->recurse_count)
-
-
-#define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?')
-#define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \
- ((*s) == '{' && regcurly(s)))
-
-#ifdef SPSTART
-#undef SPSTART /* dratted cpp namespace... */
-#endif
-/*
- * Flags to be passed up and down.
- */
-#define WORST 0 /* Worst case. */
-#define HASWIDTH 0x01 /* Known to match non-null strings. */
-#define SIMPLE 0x02 /* Simple enough to be STAR/PLUS operand. */
-#define SPSTART 0x04 /* Starts with * or +. */
-#define TRYAGAIN 0x08 /* Weeded out a declaration. */
-#define POSTPONED 0x10 /* (?1),(?&name), (??{...}) or similar */
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-RExC_emit_start) : -1)
-
-/* whether trie related optimizations are enabled */
-#if PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION
-#define TRIE_STUDY_OPT
-#define FULL_TRIE_STUDY
-#define TRIE_STCLASS
-#endif
-
-
-
-#define PBYTE(u8str,paren) ((U8*)(u8str))[(paren) >> 3]
-#define PBITVAL(paren) (1 << ((paren) & 7))
-#define PAREN_TEST(u8str,paren) ( PBYTE(u8str,paren) & PBITVAL(paren))
-#define PAREN_SET(u8str,paren) PBYTE(u8str,paren) |= PBITVAL(paren)
-#define PAREN_UNSET(u8str,paren) PBYTE(u8str,paren) &= (~PBITVAL(paren))
-
-
-/* About scan_data_t.
-
- During optimisation we recurse through the regexp program performing
- various inplace (keyhole style) optimisations. In addition study_chunk
- and scan_commit populate this data structure with information about
- what strings MUST appear in the pattern. We look for the longest
- string that must appear for at a fixed location, and we look for the
- longest string that may appear at a floating location. So for instance
- in the pattern:
-
- /FOO[xX]A.*B[xX]BAR/
-
- Both 'FOO' and 'A' are fixed strings. Both 'B' and 'BAR' are floating
- strings (because they follow a .* construct). study_chunk will identify
- both FOO and BAR as being the longest fixed and floating strings respectively.
-
- The strings can be composites, for instance
-
- /(f)(o)(o)/
-
- will result in a composite fixed substring 'foo'.
-
- For each string some basic information is maintained:
-
- - offset or min_offset
- This is the position the string must appear at, or not before.
- It also implicitly (when combined with minlenp) tells us how many
- character must match before the string we are searching.
- Likewise when combined with minlenp and the length of the string
- tells us how many characters must appear after the string we have
- found.
-
- - max_offset
- Only used for floating strings. This is the rightmost point that
- the string can appear at. Ifset to I32 max it indicates that the
- string can occur infinitely far to the right.
-
- - minlenp
- A pointer to the minimum length of the pattern that the string
- was found inside. This is important as in the case of positive
- lookahead or positive lookbehind we can have multiple patterns
- involved. Consider
-
- /(?=FOO).*F/
-
- The minimum length of the pattern overall is 3, the minimum length
- of the lookahead part is 3, but the minimum length of the part that
- will actually match is 1. So 'FOO's minimum length is 3, but the
- minimum length for the F is 1. This is important as the minimum length
- is used to determine offsets in front of and behind the string being
- looked for. Since strings can be composites this is the length of the
- pattern at the time it was commited with a scan_commit. Note that
- the length is calculated by study_chunk, so that the minimum lengths
- are not known until the full pattern has been compiled, thus the
- pointer to the value.
-
- - lookbehind
-
- In the case of lookbehind the string being searched for can be
- offset past the start point of the final matching string.
- If this value was just blithely removed from the min_offset it would
- invalidate some of the calculations for how many chars must match
- before or after (as they are derived from min_offset and minlen and
- the length of the string being searched for).
- When the final pattern is compiled and the data is moved from the
- scan_data_t structure into the regexp structure the information
- about lookbehind is factored in, with the information that would
- have been lost precalculated in the end_shift field for the
- associated string.
-
- The fields pos_min and pos_delta are used to store the minimum offset
- and the delta to the maximum offset at the current point in the pattern.
-
-*/
-
-typedef struct scan_data_t {
- /*I32 len_min; unused */
- /*I32 len_delta; unused */
- I32 pos_min;
- I32 pos_delta;
- SV *last_found;
- I32 last_end; /* min value, <0 unless valid. */
- I32 last_start_min;
- I32 last_start_max;
- SV **longest; /* Either &l_fixed, or &l_float. */
- SV *longest_fixed; /* longest fixed string found in pattern */
- I32 offset_fixed; /* offset where it starts */
- I32 *minlen_fixed; /* pointer to the minlen relevent to the string */
- I32 lookbehind_fixed; /* is the position of the string modfied by LB */
- SV *longest_float; /* longest floating string found in pattern */
- I32 offset_float_min; /* earliest point in string it can appear */
- I32 offset_float_max; /* latest point in string it can appear */
- I32 *minlen_float; /* pointer to the minlen relevent to the string */
- I32 lookbehind_float; /* is the position of the string modified by LB */
- I32 flags;
- I32 whilem_c;
- I32 *last_closep;
- struct regnode_charclass_class *start_class;
-} scan_data_t;
-
-/*
- * Forward declarations for pregcomp()'s friends.
- */
-
-static const scan_data_t zero_scan_data =
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0};
-
-#define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL)
-#define SF_BEFORE_SEOL 0x0001
-#define SF_BEFORE_MEOL 0x0002
-#define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL)
-#define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL)
-
-#ifdef NO_UNARY_PLUS
-# define SF_FIX_SHIFT_EOL (0+2)
-# define SF_FL_SHIFT_EOL (0+4)
-#else
-# define SF_FIX_SHIFT_EOL (+2)
-# define SF_FL_SHIFT_EOL (+4)
-#endif
-
-#define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL)
-#define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL)
-
-#define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL)
-#define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */
-#define SF_IS_INF 0x0040
-#define SF_HAS_PAR 0x0080
-#define SF_IN_PAR 0x0100
-#define SF_HAS_EVAL 0x0200
-#define SCF_DO_SUBSTR 0x0400
-#define SCF_DO_STCLASS_AND 0x0800
-#define SCF_DO_STCLASS_OR 0x1000
-#define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR)
-#define SCF_WHILEM_VISITED_POS 0x2000
-
-#define SCF_TRIE_RESTUDY 0x4000 /* Do restudy? */
-#define SCF_SEEN_ACCEPT 0x8000
-
-#define UTF (RExC_utf8 != 0)
-#define LOC ((RExC_flags & RXf_PMf_LOCALE) != 0)
-#define FOLD ((RExC_flags & RXf_PMf_FOLD) != 0)
-
-#define OOB_UNICODE 12345678
-#define OOB_NAMEDCLASS -1
-
-#define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b)
-
-
-/* length of regex to show in messages that don't mark a position within */
-#define RegexLengthToShowInErrorMessages 127
-
-/*
- * If MARKER[12] are adjusted, be sure to adjust the constants at the top
- * of t/op/regmesg.t, the tests in t/op/re_tests, and those in
- * op/pragma/warn/regcomp.
- */
-#define MARKER1 "<-- HERE" /* marker as it appears in the description */
-#define MARKER2 " <-- HERE " /* marker as it appears within the regex */
-
-#define REPORT_LOCATION " in regex; marked by " MARKER1 " in m/%.*s" MARKER2 "%s/"
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given
- * arg. Show regex, up to a maximum length. If it's too long, chop and add
- * "...".
- */
-#define _FAIL(code) STMT_START { \
- const char *ellipses = ""; \
- IV len = RExC_end - RExC_precomp; \
- \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- if (len > RegexLengthToShowInErrorMessages) { \
- /* chop 10 shorter than the max, to ensure meaning of "..." */ \
- len = RegexLengthToShowInErrorMessages - 10; \
- ellipses = "..."; \
- } \
- code; \
-} STMT_END
-
-#define FAIL(msg) _FAIL( \
- Perl_croak(aTHX_ "%s in regex m/%.*s%s/", \
- msg, (int)len, RExC_precomp, ellipses))
-
-#define FAIL2(msg,arg) _FAIL( \
- Perl_croak(aTHX_ msg " in regex m/%.*s%s/", \
- arg, (int)len, RExC_precomp, ellipses))
-
-/*
- * Simple_vFAIL -- like FAIL, but marks the current location in the scan
- */
-#define Simple_vFAIL(m) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- Perl_croak(aTHX_ "%s" REPORT_LOCATION, \
- m, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL()
- */
-#define vFAIL(m) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL(m); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts two arguments.
- */
-#define Simple_vFAIL2(m,a1) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2().
- */
-#define vFAIL2(m,a1) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL2(m, a1); \
-} STMT_END
-
-
-/*
- * Like Simple_vFAIL(), but accepts three arguments.
- */
-#define Simple_vFAIL3(m, a1, a2) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3().
- */
-#define vFAIL3(m,a1,a2) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL3(m, a1, a2); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts four arguments.
- */
-#define Simple_vFAIL4(m, a1, a2, a3) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s" REPORT_LOCATION, \
- m, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARNdep(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_REGEXP), \
- "%s" REPORT_LOCATION, \
- m, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-
-#define vWARN2(loc, m, a1) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN3(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN4(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN5(loc, m, a1, a2, a3, a4) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, a4, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-
-/* Allow for side effects in s */
-#define REGC(c,s) STMT_START { \
- if (!SIZE_ONLY) *(s) = (c); else (void)(s); \
-} STMT_END
-
-/* Macros for recording node offsets. 20001227 mjd@plover.com
- * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in
- * element 2*n-1 of the array. Element #2n holds the byte length node #n.
- * Element 0 holds the number n.
- * Position is 1 indexed.
- */
-#ifndef RE_TRACK_PATTERN_OFFSETS
-#define Set_Node_Offset_To_R(node,byte)
-#define Set_Node_Offset(node,byte)
-#define Set_Cur_Node_Offset
-#define Set_Node_Length_To_R(node,len)
-#define Set_Node_Length(node,len)
-#define Set_Node_Cur_Length(node)
-#define Node_Offset(n)
-#define Node_Length(n)
-#define Set_Node_Offset_Length(node,offset,len)
-#define ProgLen(ri) ri->u.proglen
-#define SetProgLen(ri,x) ri->u.proglen = x
-#else
-#define ProgLen(ri) ri->u.offsets[0]
-#define SetProgLen(ri,x) ri->u.offsets[0] = x
-#define Set_Node_Offset_To_R(node,byte) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) offset of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(byte))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Offset macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)-1] = (byte); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Offset(node,byte) \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start)
-#define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse)
-
-#define Set_Node_Length_To_R(node,len) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) size of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(len))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Length macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)] = (len); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Length(node,len) \
- Set_Node_Length_To_R((node)-RExC_emit_start, len)
-#define Set_Cur_Node_Length(len) Set_Node_Length(RExC_emit, len)
-#define Set_Node_Cur_Length(node) \
- Set_Node_Length(node, RExC_parse - parse_start)
-
-/* Get offsets and lengths */
-#define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1])
-#define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)])
-
-#define Set_Node_Offset_Length(node,offset,len) STMT_START { \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (offset)); \
- Set_Node_Length_To_R((node)-RExC_emit_start, (len)); \
-} STMT_END
-#endif
-
-#if PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS
-#define EXPERIMENTAL_INPLACESCAN
-#endif /*RE_TRACK_PATTERN_OFFSETS*/
-
-#define DEBUG_STUDYDATA(str,data,depth) \
-DEBUG_OPTIMISE_MORE_r(if(data){ \
- PerlIO_printf(Perl_debug_log, \
- "%*s" str "Pos:%"IVdf"/%"IVdf \
- " Flags: 0x%"UVXf" Whilem_c: %"IVdf" Lcp: %"IVdf" %s", \
- (int)(depth)*2, "", \
- (IV)((data)->pos_min), \
- (IV)((data)->pos_delta), \
- (UV)((data)->flags), \
- (IV)((data)->whilem_c), \
- (IV)((data)->last_closep ? *((data)->last_closep) : -1), \
- is_inf ? "INF " : "" \
- ); \
- if ((data)->last_found) \
- PerlIO_printf(Perl_debug_log, \
- "Last:'%s' %"IVdf":%"IVdf"/%"IVdf" %sFixed:'%s' @ %"IVdf \
- " %sFloat: '%s' @ %"IVdf"/%"IVdf"", \
- SvPVX_const((data)->last_found), \
- (IV)((data)->last_end), \
- (IV)((data)->last_start_min), \
- (IV)((data)->last_start_max), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_fixed)) ? "*" : "", \
- SvPVX_const((data)->longest_fixed), \
- (IV)((data)->offset_fixed), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_float)) ? "*" : "", \
- SvPVX_const((data)->longest_float), \
- (IV)((data)->offset_float_min), \
- (IV)((data)->offset_float_max) \
- ); \
- PerlIO_printf(Perl_debug_log,"\n"); \
-});
-
-static void clear_re(pTHX_ void *r);
-
-/* Mark that we cannot extend a found fixed substring at this point.
- Update the longest found anchored substring and the longest found
- floating substrings if needed. */
-
-STATIC void
-S_scan_commit(pTHX_ const RExC_state_t *pRExC_state, scan_data_t *data, I32 *minlenp, int is_inf)
-{
- const STRLEN l = CHR_SVLEN(data->last_found);
- const STRLEN old_l = CHR_SVLEN(*data->longest);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_SCAN_COMMIT;
-
- if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) {
- SvSetMagicSV(*data->longest, data->last_found);
- if (*data->longest == data->longest_fixed) {
- data->offset_fixed = l ? data->last_start_min : data->pos_min;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL);
- else
- data->flags &= ~SF_FIX_BEFORE_EOL;
- data->minlen_fixed=minlenp;
- data->lookbehind_fixed=0;
- }
- else { /* *data->longest == data->longest_float */
- data->offset_float_min = l ? data->last_start_min : data->pos_min;
- data->offset_float_max = (l
- ? data->last_start_max
- : data->pos_min + data->pos_delta);
- if (is_inf || (U32)data->offset_float_max > (U32)I32_MAX)
- data->offset_float_max = I32_MAX;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL);
- else
- data->flags &= ~SF_FL_BEFORE_EOL;
- data->minlen_float=minlenp;
- data->lookbehind_float=0;
- }
- }
- SvCUR_set(data->last_found, 0);
- {
- SV * const sv = data->last_found;
- if (SvUTF8(sv) && SvMAGICAL(sv)) {
- MAGIC * const mg = mg_find(sv, PERL_MAGIC_utf8);
- if (mg)
- mg->mg_len = 0;
- }
- }
- data->last_end = -1;
- data->flags &= ~SF_BEFORE_EOL;
- DEBUG_STUDYDATA("commit: ",data,0);
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_anything(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_ANYTHING;
-
- ANYOF_CLASS_ZERO(cl);
- ANYOF_BITMAP_SETALL(cl);
- cl->flags = ANYOF_EOS|ANYOF_UNICODE_ALL;
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* Can match anything (initialization) */
-STATIC int
-S_cl_is_anything(const struct regnode_charclass_class *cl)
-{
- int value;
-
- PERL_ARGS_ASSERT_CL_IS_ANYTHING;
-
- for (value = 0; value <= ANYOF_MAX; value += 2)
- if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1))
- return 1;
- if (!(cl->flags & ANYOF_UNICODE_ALL))
- return 0;
- if (!ANYOF_BITMAP_TESTALLSET((const void*)cl))
- return 0;
- return 1;
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_init(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
-}
-
-STATIC void
-S_cl_init_zero(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT_ZERO;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* 'And' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_and(struct regnode_charclass_class *cl,
- const struct regnode_charclass_class *and_with)
-{
- PERL_ARGS_ASSERT_CL_AND;
-
- assert(and_with->type == ANYOF);
- if (!(and_with->flags & ANYOF_CLASS)
- && !(cl->flags & ANYOF_CLASS)
- && (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(and_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD)) {
- int i;
-
- if (and_with->flags & ANYOF_INVERT)
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= ~and_with->bitmap[i];
- else
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= and_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise, leave it along for a moment. */
- if (!(and_with->flags & ANYOF_EOS))
- cl->flags &= ~ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE_ALL && and_with->flags & ANYOF_UNICODE &&
- !(and_with->flags & ANYOF_INVERT)) {
- cl->flags &= ~ANYOF_UNICODE_ALL;
- cl->flags |= ANYOF_UNICODE;
- ARG_SET(cl, ARG(and_with));
- }
- if (!(and_with->flags & ANYOF_UNICODE_ALL) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE_ALL;
- if (!(and_with->flags & (ANYOF_UNICODE|ANYOF_UNICODE_ALL)) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE;
-}
-
-/* 'OR' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_or(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl, const struct regnode_charclass_class *or_with)
-{
- PERL_ARGS_ASSERT_CL_OR;
-
- if (or_with->flags & ANYOF_INVERT) {
- /* We do not use
- * (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2))
- * <= (B1 | !B2) | (CL1 | !CL2)
- * which is wasteful if CL2 is small, but we ignore CL2:
- * (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1
- * XXXX Can we handle case-fold? Unclear:
- * (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) =
- * (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i'))
- */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(or_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD) ) {
- int i;
-
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= ~or_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise */
- else {
- cl_anything(pRExC_state, cl);
- }
- } else {
- /* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && (!(or_with->flags & ANYOF_FOLD)
- || (cl->flags & ANYOF_FOLD)) ) {
- int i;
-
- /* OR char bitmap and class bitmap separately */
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= or_with->bitmap[i];
- if (or_with->flags & ANYOF_CLASS) {
- for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++)
- cl->classflags[i] |= or_with->classflags[i];
- cl->flags |= ANYOF_CLASS;
- }
- }
- else { /* XXXX: logic is complicated, leave it along for a moment. */
- cl_anything(pRExC_state, cl);
- }
- }
- if (or_with->flags & ANYOF_EOS)
- cl->flags |= ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE && or_with->flags & ANYOF_UNICODE &&
- ARG(cl) != ARG(or_with)) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
- if (or_with->flags & ANYOF_UNICODE_ALL) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
-}
-
-#define TRIE_LIST_ITEM(state,idx) (trie->states[state].trans.list)[ idx ]
-#define TRIE_LIST_CUR(state) ( TRIE_LIST_ITEM( state, 0 ).forid )
-#define TRIE_LIST_LEN(state) ( TRIE_LIST_ITEM( state, 0 ).newstate )
-#define TRIE_LIST_USED(idx) ( trie->states[state].trans.list ? (TRIE_LIST_CUR( idx ) - 1) : 0 )
-
-
-#ifdef DEBUGGING
-/*
- dump_trie(trie,widecharmap,revcharmap)
- dump_trie_interim_list(trie,widecharmap,revcharmap,next_alloc)
- dump_trie_interim_table(trie,widecharmap,revcharmap,next_alloc)
-
- These routines dump out a trie in a somewhat readable format.
- The _interim_ variants are used for debugging the interim
- tables that are used to generate the final compressed
- representation which is what dump_trie expects.
-
- Part of the reason for their existance is to provide a form
- of documentation as to how the different representations function.
-
-*/
-
-/*
- Dumps the final compressed table form of the trie to Perl_debug_log.
- Used for debugging make_trie().
-*/
-
-STATIC void
-S_dump_trie(pTHX_ const struct _reg_trie_data *trie, HV *widecharmap,
- AV *revcharmap, U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE;
-
- PerlIO_printf( Perl_debug_log, "%*sChar : %-6s%-6s%-4s ",
- (int)depth * 2 + 2,"",
- "Match","Base","Ofs" );
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ ) {
- SV ** const tmp = av_fetch( revcharmap, state, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
- PerlIO_printf( Perl_debug_log, "\n%*sState|-----------------------",
- (int)depth * 2 + 2,"");
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ )
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth, "--------");
- PerlIO_printf( Perl_debug_log, "\n");
-
- for( state = 1 ; state < trie->statecount ; state++ ) {
- const U32 base = trie->states[ state ].trans.base;
-
- PerlIO_printf( Perl_debug_log, "%*s#%4"UVXf"|", (int)depth * 2 + 2,"", (UV)state);
-
- if ( trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " W%4X", trie->states[ state ].wordnum );
- } else {
- PerlIO_printf( Perl_debug_log, "%6s", "" );
- }
-
- PerlIO_printf( Perl_debug_log, " @%4"UVXf" ", (UV)base );
-
- if ( base ) {
- U32 ofs = 0;
-
- while( ( base + ofs < trie->uniquecharcount ) ||
- ( base + ofs - trie->uniquecharcount < trie->lasttrans
- && trie->trans[ base + ofs - trie->uniquecharcount ].check != state))
- ofs++;
-
- PerlIO_printf( Perl_debug_log, "+%2"UVXf"[ ", (UV)ofs);
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- PerlIO_printf( Perl_debug_log, "%*"UVXf,
- colwidth,
- (UV)trie->trans[ base + ofs - trie->uniquecharcount ].next );
- } else {
- PerlIO_printf( Perl_debug_log, "%*s",colwidth," ." );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "]");
-
- }
- PerlIO_printf( Perl_debug_log, "\n" );
- }
-}
-/*
- Dumps a fully constructed but uncompressed trie in list form.
- List tries normally only are used for construction when the number of
- possible chars (trie->uniquecharcount) is very high.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_list(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_LIST;
-
- /* print out the table precompression. */
- PerlIO_printf( Perl_debug_log, "%*sState :Word | Transition Data\n%*s%s",
- (int)depth * 2 + 2,"", (int)depth * 2 + 2,"",
- "------:-----+-----------------\n" );
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U16 charid;
-
- PerlIO_printf( Perl_debug_log, "%*s %4"UVXf" :",
- (int)depth * 2 + 2,"", (UV)state );
- if ( ! trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, "%5s| ","");
- } else {
- PerlIO_printf( Perl_debug_log, "W%4x| ",
- trie->states[ state ].wordnum
- );
- }
- for( charid = 1 ; charid <= TRIE_LIST_USED( state ) ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, TRIE_LIST_ITEM(state,charid).forid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s:%3X=%4"UVXf" | ",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- ) ,
- TRIE_LIST_ITEM(state,charid).forid,
- (UV)TRIE_LIST_ITEM(state,charid).newstate
- );
- if (!(charid % 10))
- PerlIO_printf(Perl_debug_log, "\n%*s| ",
- (int)((depth * 2) + 14), "");
- }
- }
- PerlIO_printf( Perl_debug_log, "\n");
- }
-}
-
-/*
- Dumps a fully constructed but uncompressed trie in table form.
- This is the normal DFA style state transition table, with a few
- twists to facilitate compression later.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_table(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- U16 charid;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_TABLE;
-
- /*
- print out the table precompression so that we can do a visual check
- that they are identical.
- */
-
- PerlIO_printf( Perl_debug_log, "%*sChar : ",(int)depth * 2 + 2,"" );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, charid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "\n%*sState+-",(int)depth * 2 + 2,"" );
-
- for( charid=0 ; charid < trie->uniquecharcount ; charid++ ) {
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth,"--------");
- }
-
- PerlIO_printf( Perl_debug_log, "\n" );
-
- for( state=1 ; state < next_alloc ; state += trie->uniquecharcount ) {
-
- PerlIO_printf( Perl_debug_log, "%*s%4"UVXf" : ",
- (int)depth * 2 + 2,"",
- (UV)TRIE_NODENUM( state ) );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- UV v=(UV)SAFE_TRIE_NODENUM( trie->trans[ state + charid ].next );
- if (v)
- PerlIO_printf( Perl_debug_log, "%*"UVXf, colwidth, v );
- else
- PerlIO_printf( Perl_debug_log, "%*s", colwidth, "." );
- }
- if ( ! trie->states[ TRIE_NODENUM( state ) ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf")\n", (UV)trie->trans[ state ].check );
- } else {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf") W%4X\n", (UV)trie->trans[ state ].check,
- trie->states[ TRIE_NODENUM( state ) ].wordnum );
- }
- }
-}
-
-#endif
-
-/* make_trie(startbranch,first,last,tail,word_count,flags,depth)
- startbranch: the first branch in the whole branch sequence
- first : start branch of sequence of branch-exact nodes.
- May be the same as startbranch
- last : Thing following the last branch.
- May be the same as tail.
- tail : item following the branch sequence
- count : words in the sequence
- flags : currently the OP() type we will be building one of /EXACT(|F|Fl)/
- depth : indent depth
-
-Inplace optimizes a sequence of 2 or more Branch-Exact nodes into a TRIE node.
-
-A trie is an N'ary tree where the branches are determined by digital
-decomposition of the key. IE, at the root node you look up the 1st character and
-follow that branch repeat until you find the end of the branches. Nodes can be
-marked as "accepting" meaning they represent a complete word. Eg:
-
- /he|she|his|hers/
-
-would convert into the following structure. Numbers represent states, letters
-following numbers represent valid transitions on the letter from that state, if
-the number is in square brackets it represents an accepting state, otherwise it
-will be in parenthesis.
-
- +-h->+-e->[3]-+-r->(8)-+-s->[9]
- | |
- | (2)
- | |
- (1) +-i->(6)-+-s->[7]
- |
- +-s->(3)-+-h->(4)-+-e->[5]
-
- Accept Word Mapping: 3=>1 (he),5=>2 (she), 7=>3 (his), 9=>4 (hers)
-
-This shows that when matching against the string 'hers' we will begin at state 1
-read 'h' and move to state 2, read 'e' and move to state 3 which is accepting,
-then read 'r' and go to state 8 followed by 's' which takes us to state 9 which
-is also accepting. Thus we know that we can match both 'he' and 'hers' with a
-single traverse. We store a mapping from accepting to state to which word was
-matched, and then when we have multiple possibilities we try to complete the
-rest of the regex in the order in which they occured in the alternation.
-
-The only prior NFA like behaviour that would be changed by the TRIE support is
-the silent ignoring of duplicate alternations which are of the form:
-
- / (DUPE|DUPE) X? (?{ ... }) Y /x
-
-Thus EVAL blocks follwing a trie may be called a different number of times with
-and without the optimisation. With the optimisations dupes will be silently
-ignored. This inconsistant behaviour of EVAL type nodes is well established as
-the following demonstrates:
-
- 'words'=~/(word|word|word)(?{ print $1 })[xyz]/
-
-which prints out 'word' three times, but
-
- 'words'=~/(word|word|word)(?{ print $1 })S/
-
-which doesnt print it out at all. This is due to other optimisations kicking in.
-
-Example of what happens on a structural level:
-
-The regexp /(ac|ad|ab)+/ will produce the folowing debug output:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: BRANCH(8)
- 6: EXACT <ac>(16)
- 8: BRANCH(11)
- 9: EXACT <ad>(16)
- 11: BRANCH(14)
- 12: EXACT <ab>(16)
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-This would be optimizable with startbranch=5, first=5, last=16, tail=16
-and should turn into:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: TRIE(16)
- [Words:3 Chars Stored:6 Unique Chars:4 States:5 NCP:1]
- <ac>
- <ad>
- <ab>
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-Cases where tail != last would be like /(?foo|bar)baz/:
-
- 1: BRANCH(4)
- 2: EXACT <foo>(8)
- 4: BRANCH(7)
- 5: EXACT <bar>(8)
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
-which would be optimizable with startbranch=1, first=1, last=7, tail=8
-and would end up looking like:
-
- 1: TRIE(8)
- [Words:2 Chars Stored:6 Unique Chars:5 States:7 NCP:1]
- <foo>
- <bar>
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
- d = uvuni_to_utf8_flags(d, uv, 0);
-
-is the recommended Unicode-aware way of saying
-
- *(d++) = uv;
-*/
-
-#define TRIE_STORE_REVCHAR \
- STMT_START { \
- if (UTF) { \
- SV *zlopp = newSV(2); \
- unsigned char *flrbbbbb = (unsigned char *) SvPVX(zlopp); \
- unsigned const char *const kapow = uvuni_to_utf8(flrbbbbb, uvc & 0xFF); \
- SvCUR_set(zlopp, kapow - flrbbbbb); \
- SvPOK_on(zlopp); \
- SvUTF8_on(zlopp); \
- av_push(revcharmap, zlopp); \
- } else { \
- char ooooff = (char)uvc; \
- av_push(revcharmap, newSVpvn(&ooooff, 1)); \
- } \
- } STMT_END
-
-#define TRIE_READ_CHAR STMT_START { \
- wordlen++; \
- if ( UTF ) { \
- if ( folder ) { \
- if ( foldlen > 0 ) { \
- uvc = utf8n_to_uvuni( scan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- scan += len; \
- len = 0; \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- scan = foldbuf + UNISKIP( uvc ); \
- } \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- } \
- } else { \
- uvc = (U32)*uc; \
- len = 1; \
- } \
-} STMT_END
-
-
-
-#define TRIE_LIST_PUSH(state,fid,ns) STMT_START { \
- if ( TRIE_LIST_CUR( state ) >=TRIE_LIST_LEN( state ) ) { \
- U32 ging = TRIE_LIST_LEN( state ) *= 2; \
- Renew( trie->states[ state ].trans.list, ging, reg_trie_trans_le ); \
- } \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).forid = fid; \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).newstate = ns; \
- TRIE_LIST_CUR( state )++; \
-} STMT_END
-
-#define TRIE_LIST_NEW(state) STMT_START { \
- Newxz( trie->states[ state ].trans.list, \
- 4, reg_trie_trans_le ); \
- TRIE_LIST_CUR( state ) = 1; \
- TRIE_LIST_LEN( state ) = 4; \
-} STMT_END
-
-#define TRIE_HANDLE_WORD(state) STMT_START { \
- U16 dupe= trie->states[ state ].wordnum; \
- regnode * const noper_next = regnext( noper ); \
- \
- if (trie->wordlen) \
- trie->wordlen[ curword ] = wordlen; \
- DEBUG_r({ \
- /* store the word for dumping */ \
- SV* tmp; \
- if (OP(noper) != NOTHING) \
- tmp = newSVpvn_utf8(STRING(noper), STR_LEN(noper), UTF); \
- else \
- tmp = newSVpvn_utf8( "", 0, UTF ); \
- av_push( trie_words, tmp ); \
- }); \
- \
- curword++; \
- \
- if ( noper_next < tail ) { \
- if (!trie->jump) \
- trie->jump = (U16 *) PerlMemShared_calloc( word_count + 1, sizeof(U16) ); \
- trie->jump[curword] = (U16)(noper_next - convert); \
- if (!jumper) \
- jumper = noper_next; \
- if (!nextbranch) \
- nextbranch= regnext(cur); \
- } \
- \
- if ( dupe ) { \
- /* So it's a dupe. This means we need to maintain a */\
- /* linked-list from the first to the next. */\
- /* we only allocate the nextword buffer when there */\
- /* a dupe, so first time we have to do the allocation */\
- if (!trie->nextword) \
- trie->nextword = (U16 *) \
- PerlMemShared_calloc( word_count + 1, sizeof(U16)); \
- while ( trie->nextword[dupe] ) \
- dupe= trie->nextword[dupe]; \
- trie->nextword[dupe]= curword; \
- } else { \
- /* we haven't inserted this word yet. */ \
- trie->states[ state ].wordnum = curword; \
- } \
-} STMT_END
-
-
-#define TRIE_TRANS_STATE(state,base,ucharcount,charid,special) \
- ( ( base + charid >= ucharcount \
- && base + charid < ubound \
- && state == trie->trans[ base - ucharcount + charid ].check \
- && trie->trans[ base - ucharcount + charid ].next ) \
- ? trie->trans[ base - ucharcount + charid ].next \
- : ( state==1 ? special : 0 ) \
- )
-
-#define MADE_TRIE 1
-#define MADE_JUMP_TRIE 2
-#define MADE_EXACT_TRIE 4
-
-STATIC I32
-S_make_trie(pTHX_ RExC_state_t *pRExC_state, regnode *startbranch, regnode *first, regnode *last, regnode *tail, U32 word_count, U32 flags, U32 depth)
-{
- dVAR;
- /* first pass, loop through and scan words */
- reg_trie_data *trie;
- HV *widecharmap = NULL;
- AV *revcharmap = newAV();
- regnode *cur;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- STRLEN len = 0;
- UV uvc = 0;
- U16 curword = 0;
- U32 next_alloc = 0;
- regnode *jumper = NULL;
- regnode *nextbranch = NULL;
- regnode *convert = NULL;
- /* we just use folder as a flag in utf8 */
- const U8 * const folder = ( flags == EXACTF
- ? PL_fold
- : ( flags == EXACTFL
- ? PL_fold_locale
- : NULL
- )
- );
-
-#ifdef DEBUGGING
- const U32 data_slot = add_data( pRExC_state, 4, "tuuu" );
- AV *trie_words = NULL;
- /* along with revcharmap, this only used during construction but both are
- * useful during debugging so we store them in the struct when debugging.
- */
-#else
- const U32 data_slot = add_data( pRExC_state, 2, "tu" );
- STRLEN trie_charcount=0;
-#endif
- SV *re_trie_maxbuff;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- trie = (reg_trie_data *) PerlMemShared_calloc( 1, sizeof(reg_trie_data) );
- trie->refcount = 1;
- trie->startstate = 1;
- trie->wordcount = word_count;
- RExC_rxi->data->data[ data_slot ] = (void*)trie;
- trie->charmap = (U16 *) PerlMemShared_calloc( 256, sizeof(U16) );
- if (!(UTF && folder))
- trie->bitmap = (char *) PerlMemShared_calloc( ANYOF_BITMAP_SIZE, 1 );
- DEBUG_r({
- trie_words = newAV();
- });
-
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff)) {
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- DEBUG_OPTIMISE_r({
- PerlIO_printf( Perl_debug_log,
- "%*smake_trie start==%d, first==%d, last==%d, tail==%d depth=%d\n",
- (int)depth * 2 + 2, "",
- REG_NODE_NUM(startbranch),REG_NODE_NUM(first),
- REG_NODE_NUM(last), REG_NODE_NUM(tail),
- (int)depth);
- });
-
- /* Find the node we are going to overwrite */
- if ( first == startbranch && OP( last ) != BRANCH ) {
- /* whole branch chain */
- convert = first;
- } else {
- /* branch sub-chain */
- convert = NEXTOPER( first );
- }
-
- /* -- First loop and Setup --
-
- We first traverse the branches and scan each word to determine if it
- contains widechars, and how many unique chars there are, this is
- important as we have to build a table with at least as many columns as we
- have unique chars.
-
- We use an array of integers to represent the character codes 0..255
- (trie->charmap) and we use a an HV* to store Unicode characters. We use the
- native representation of the character value as the key and IV's for the
- coded index.
-
- *TODO* If we keep track of how many times each character is used we can
- remap the columns so that the table compression later on is more
- efficient in terms of memory by ensuring most common value is in the
- middle and the least common are on the outside. IMO this would be better
- than a most to least common mapping as theres a decent chance the most
- common letter will share a node with the least common, meaning the node
- will not be compressable. With a middle is most common approach the worst
- case is when we have the least common nodes twice.
-
- */
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- STRLEN foldlen = 0;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- const U8 *scan = (U8*)NULL;
- U32 wordlen = 0; /* required init */
- STRLEN chars = 0;
- bool set_bit = trie->bitmap ? 1 : 0; /*store the first char in the bitmap?*/
-
- if (OP(noper) == NOTHING) {
- trie->minlen= 0;
- continue;
- }
- if ( set_bit ) /* bitmap only alloced when !(UTF&&Folding) */
- TRIE_BITMAP_SET(trie,*uc); /* store the raw first byte
- regardless of encoding */
-
- for ( ; uc < e ; uc += len ) {
- TRIE_CHARCOUNT(trie)++;
- TRIE_READ_CHAR;
- chars++;
- if ( uvc < 256 ) {
- if ( !trie->charmap[ uvc ] ) {
- trie->charmap[ uvc ]=( ++trie->uniquecharcount );
- if ( folder )
- trie->charmap[ folder[ uvc ] ] = trie->charmap[ uvc ];
- TRIE_STORE_REVCHAR;
- }
- if ( set_bit ) {
- /* store the codepoint in the bitmap, and if its ascii
- also store its folded equivelent. */
- TRIE_BITMAP_SET(trie,uvc);
-
- /* store the folded codepoint */
- if ( folder ) TRIE_BITMAP_SET(trie,folder[ uvc ]);
-
- if ( !UTF ) {
- /* store first byte of utf8 representation of
- codepoints in the 127 < uvc < 256 range */
- if (127 < uvc && uvc < 192) {
- TRIE_BITMAP_SET(trie,194);
- } else if (191 < uvc ) {
- TRIE_BITMAP_SET(trie,195);
- /* && uvc < 256 -- we know uvc is < 256 already */
- }
- }
- set_bit = 0; /* We've done our bit :-) */
- }
- } else {
- SV** svpp;
- if ( !widecharmap )
- widecharmap = newHV();
-
- svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 1 );
-
- if ( !svpp )
- Perl_croak( aTHX_ "error creating/fetching widecharmap entry for 0x%"UVXf, uvc );
-
- if ( !SvTRUE( *svpp ) ) {
- sv_setiv( *svpp, ++trie->uniquecharcount );
- TRIE_STORE_REVCHAR;
- }
- }
- }
- if( cur == first ) {
- trie->minlen=chars;
- trie->maxlen=chars;
- } else if (chars < trie->minlen) {
- trie->minlen=chars;
- } else if (chars > trie->maxlen) {
- trie->maxlen=chars;
- }
-
- } /* end first pass */
- DEBUG_TRIE_COMPILE_r(
- PerlIO_printf( Perl_debug_log, "%*sTRIE(%s): W:%d C:%d Uq:%d Min:%d Max:%d\n",
- (int)depth * 2 + 2,"",
- ( widecharmap ? "UTF8" : "NATIVE" ), (int)word_count,
- (int)TRIE_CHARCOUNT(trie), trie->uniquecharcount,
- (int)trie->minlen, (int)trie->maxlen )
- );
- trie->wordlen = (U32 *) PerlMemShared_calloc( word_count, sizeof(U32) );
-
- /*
- We now know what we are dealing with in terms of unique chars and
- string sizes so we can calculate how much memory a naive
- representation using a flat table will take. If it's over a reasonable
- limit (as specified by ${^RE_TRIE_MAXBUF}) we use a more memory
- conservative but potentially much slower representation using an array
- of lists.
-
- At the end we convert both representations into the same compressed
- form that will be used in regexec.c for matching with. The latter
- is a form that cannot be used to construct with but has memory
- properties similar to the list form and access properties similar
- to the table form making it both suitable for fast searches and
- small enough that its feasable to store for the duration of a program.
-
- See the comment in the code where the compressed table is produced
- inplace from the flat tabe representation for an explanation of how
- the compression works.
-
- */
-
-
- if ( (IV)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1) > SvIV(re_trie_maxbuff) ) {
- /*
- Second Pass -- Array Of Lists Representation
-
- Each state will be represented by a list of charid:state records
- (reg_trie_trans_le) the first such element holds the CUR and LEN
- points of the allocated array. (See defines above).
-
- We build the initial structure using the lists, and then convert
- it into the compressed table form which allows faster lookups
- (but cant be modified once converted).
- */
-
- STRLEN transcount = 1;
-
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using list compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- TRIE_LIST_NEW(1);
- next_alloc = 2;
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- U32 state = 1; /* required init */
- U16 charid = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if (OP(noper) != NOTHING) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV** const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- if ( !svpp ) {
- charid = 0;
- } else {
- charid=(U16)SvIV( *svpp );
- }
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- if ( charid ) {
-
- U16 check;
- U32 newstate = 0;
-
- charid--;
- if ( !trie->states[ state ].trans.list ) {
- TRIE_LIST_NEW( state );
- }
- for ( check = 1; check <= TRIE_LIST_USED( state ); check++ ) {
- if ( TRIE_LIST_ITEM( state, check ).forid == charid ) {
- newstate = TRIE_LIST_ITEM( state, check ).newstate;
- break;
- }
- }
- if ( ! newstate ) {
- newstate = next_alloc++;
- TRIE_LIST_PUSH( state, charid, newstate );
- transcount++;
- }
- state = newstate;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- }
- }
- TRIE_HANDLE_WORD(state);
-
- } /* end second pass */
-
- /* next alloc is the NEXT state to be allocated */
- trie->statecount = next_alloc;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states,
- next_alloc
- * sizeof(reg_trie_state) );
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_list(trie, widecharmap,
- revcharmap, next_alloc,
- depth+1)
- );
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( transcount, sizeof(reg_trie_trans) );
- {
- U32 state;
- U32 tp = 0;
- U32 zp = 0;
-
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U32 base=0;
-
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, "tp: %d zp: %d ",tp,zp)
- );
- */
-
- if (trie->states[state].trans.list) {
- U16 minid=TRIE_LIST_ITEM( state, 1).forid;
- U16 maxid=minid;
- U16 idx;
-
- for( idx = 2 ; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U16 forid = TRIE_LIST_ITEM( state, idx).forid;
- if ( forid < minid ) {
- minid=forid;
- } else if ( forid > maxid ) {
- maxid=forid;
- }
- }
- if ( transcount < tp + maxid - minid + 1) {
- transcount *= 2;
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans,
- transcount
- * sizeof(reg_trie_trans) );
- Zero( trie->trans + (transcount / 2), transcount / 2 , reg_trie_trans );
- }
- base = trie->uniquecharcount + tp - minid;
- if ( maxid == minid ) {
- U32 set = 0;
- for ( ; zp < tp ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- base = trie->uniquecharcount + zp - minid;
- trie->trans[ zp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ zp ].check = state;
- set = 1;
- break;
- }
- }
- if ( !set ) {
- trie->trans[ tp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ tp ].check = state;
- tp++;
- zp = tp;
- }
- } else {
- for ( idx=1; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U32 tid = base - trie->uniquecharcount + TRIE_LIST_ITEM( state, idx ).forid;
- trie->trans[ tid ].next = TRIE_LIST_ITEM( state, idx ).newstate;
- trie->trans[ tid ].check = state;
- }
- tp += ( maxid - minid + 1 );
- }
- Safefree(trie->states[ state ].trans.list);
- }
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, " base: %d\n",base);
- );
- */
- trie->states[ state ].trans.base=base;
- }
- trie->lasttrans = tp + 1;
- }
- } else {
- /*
- Second Pass -- Flat Table Representation.
-
- we dont use the 0 slot of either trans[] or states[] so we add 1 to each.
- We know that we will need Charcount+1 trans at most to store the data
- (one row per char at worst case) So we preallocate both structures
- assuming worst case.
-
- We then construct the trie using only the .next slots of the entry
- structs.
-
- We use the .check field of the first entry of the node temporarily to
- make compression both faster and easier by keeping track of how many non
- zero fields are in the node.
-
- Since trans are numbered from 1 any 0 pointer in the table is a FAIL
- transition.
-
- There are two terms at use here: state as a TRIE_NODEIDX() which is a
- number representing the first entry of the node, and state as a
- TRIE_NODENUM() which is the trans number. state 1 is TRIE_NODEIDX(1) and
- TRIE_NODENUM(1), state 2 is TRIE_NODEIDX(2) and TRIE_NODENUM(3) if there
- are 2 entrys per node. eg:
-
- A B A B
- 1. 2 4 1. 3 7
- 2. 0 3 3. 0 5
- 3. 0 0 5. 0 0
- 4. 0 0 7. 0 0
-
- The table is internally in the right hand, idx form. However as we also
- have to deal with the states array which is indexed by nodenum we have to
- use TRIE_NODENUM() to convert.
-
- */
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using table compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( ( TRIE_CHARCOUNT(trie) + 1 )
- * trie->uniquecharcount + 1,
- sizeof(reg_trie_trans) );
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- next_alloc = trie->uniquecharcount + 1;
-
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
-
- U32 state = 1; /* required init */
-
- U16 charid = 0; /* sanity init */
- U32 accept_state = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
-
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if ( OP(noper) != NOTHING ) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV* const * const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- charid = svpp ? (U16)SvIV(*svpp) : 0;
- }
- if ( charid ) {
- charid--;
- if ( !trie->trans[ state + charid ].next ) {
- trie->trans[ state + charid ].next = next_alloc;
- trie->trans[ state ].check++;
- next_alloc += trie->uniquecharcount;
- }
- state = trie->trans[ state + charid ].next;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- }
- }
- accept_state = TRIE_NODENUM( state );
- TRIE_HANDLE_WORD(accept_state);
-
- } /* end second pass */
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_table(trie, widecharmap,
- revcharmap,
- next_alloc, depth+1));
-
- {
- /*
- * Inplace compress the table.*
-
- For sparse data sets the table constructed by the trie algorithm will
- be mostly 0/FAIL transitions or to put it another way mostly empty.
- (Note that leaf nodes will not contain any transitions.)
-
- This algorithm compresses the tables by eliminating most such
- transitions, at the cost of a modest bit of extra work during lookup:
-
- - Each states[] entry contains a .base field which indicates the
- index in the state[] array wheres its transition data is stored.
-
- - If .base is 0 there are no valid transitions from that node.
-
- - If .base is nonzero then charid is added to it to find an entry in
- the trans array.
-
- -If trans[states[state].base+charid].check!=state then the
- transition is taken to be a 0/Fail transition. Thus if there are fail
- transitions at the front of the node then the .base offset will point
- somewhere inside the previous nodes data (or maybe even into a node
- even earlier), but the .check field determines if the transition is
- valid.
-
- XXX - wrong maybe?
- The following process inplace converts the table to the compressed
- table: We first do not compress the root node 1,and mark its all its
- .check pointers as 1 and set its .base pointer as 1 as well. This
- allows to do a DFA construction from the compressed table later, and
- ensures that any .base pointers we calculate later are greater than
- 0.
-
- - We set 'pos' to indicate the first entry of the second node.
-
- - We then iterate over the columns of the node, finding the first and
- last used entry at l and m. We then copy l..m into pos..(pos+m-l),
- and set the .check pointers accordingly, and advance pos
- appropriately and repreat for the next node. Note that when we copy
- the next pointers we have to convert them from the original
- NODEIDX form to NODENUM form as the former is not valid post
- compression.
-
- - If a node has no transitions used we mark its base as 0 and do not
- advance the pos pointer.
-
- - If a node only has one transition we use a second pointer into the
- structure to fill in allocated fail transitions from other states.
- This pointer is independent of the main pointer and scans forward
- looking for null transitions that are allocated to a state. When it
- finds one it writes the single transition into the "hole". If the
- pointer doesnt find one the single transition is appended as normal.
-
- - Once compressed we can Renew/realloc the structures to release the
- excess space.
-
- See "Table-Compression Methods" in sec 3.9 of the Red Dragon,
- specifically Fig 3.47 and the associated pseudocode.
-
- demq
- */
- const U32 laststate = TRIE_NODENUM( next_alloc );
- U32 state, charid;
- U32 pos = 0, zp=0;
- trie->statecount = laststate;
-
- for ( state = 1 ; state < laststate ; state++ ) {
- U8 flag = 0;
- const U32 stateidx = TRIE_NODEIDX( state );
- const U32 o_used = trie->trans[ stateidx ].check;
- U32 used = trie->trans[ stateidx ].check;
- trie->trans[ stateidx ].check = 0;
-
- for ( charid = 0 ; used && charid < trie->uniquecharcount ; charid++ ) {
- if ( flag || trie->trans[ stateidx + charid ].next ) {
- if ( trie->trans[ stateidx + charid ].next ) {
- if (o_used == 1) {
- for ( ; zp < pos ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- break;
- }
- }
- trie->states[ state ].trans.base = zp + trie->uniquecharcount - charid ;
- trie->trans[ zp ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ zp ].check = state;
- if ( ++zp > pos ) pos = zp;
- break;
- }
- used--;
- }
- if ( !flag ) {
- flag = 1;
- trie->states[ state ].trans.base = pos + trie->uniquecharcount - charid ;
- }
- trie->trans[ pos ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ pos ].check = state;
- pos++;
- }
- }
- }
- trie->lasttrans = pos + 1;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states, laststate
- * sizeof(reg_trie_state) );
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log,
- "%*sAlloc: %d Orig: %"IVdf" elements, Final:%"IVdf". Savings of %%%5.2f\n",
- (int)depth * 2 + 2,"",
- (int)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1 ),
- (IV)next_alloc,
- (IV)pos,
- ( ( next_alloc - pos ) * 100 ) / (double)next_alloc );
- );
-
- } /* end table compress */
- }
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf(Perl_debug_log, "%*sStatecount:%"UVxf" Lasttrans:%"UVxf"\n",
- (int)depth * 2 + 2, "",
- (UV)trie->statecount,
- (UV)trie->lasttrans)
- );
- /* resize the trans array to remove unused space */
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans, trie->lasttrans
- * sizeof(reg_trie_trans) );
-
- /* and now dump out the compressed format */
- DEBUG_TRIE_COMPILE_r(dump_trie(trie, widecharmap, revcharmap, depth+1));
-
- { /* Modify the program and insert the new TRIE node*/
- U8 nodetype =(U8)(flags & 0xFF);
- char *str=NULL;
-
-#ifdef DEBUGGING
- regnode *optimize = NULL;
-#ifdef RE_TRACK_PATTERN_OFFSETS
-
- U32 mjd_offset = 0;
- U32 mjd_nodelen = 0;
-#endif /* RE_TRACK_PATTERN_OFFSETS */
-#endif /* DEBUGGING */
- /*
- This means we convert either the first branch or the first Exact,
- depending on whether the thing following (in 'last') is a branch
- or not and whther first is the startbranch (ie is it a sub part of
- the alternation or is it the whole thing.)
- Assuming its a sub part we conver the EXACT otherwise we convert
- the whole branch sequence, including the first.
- */
- /* Find the node we are going to overwrite */
- if ( first != startbranch || OP( last ) == BRANCH ) {
- /* branch sub-chain */
- NEXT_OFF( first ) = (U16)(last - first);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_r({
- mjd_offset= Node_Offset((convert));
- mjd_nodelen= Node_Length((convert));
- });
-#endif
- /* whole branch chain */
- }
-#ifdef RE_TRACK_PATTERN_OFFSETS
- else {
- DEBUG_r({
- const regnode *nop = NEXTOPER( convert );
- mjd_offset= Node_Offset((nop));
- mjd_nodelen= Node_Length((nop));
- });
- }
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%*sMJD offset:%"UVuf" MJD length:%"UVuf"\n",
- (int)depth * 2 + 2, "",
- (UV)mjd_offset, (UV)mjd_nodelen)
- );
-#endif
- /* But first we check to see if there is a common prefix we can
- split out as an EXACT and put in front of the TRIE node. */
- trie->startstate= 1;
- if ( trie->bitmap && !widecharmap && !trie->jump ) {
- U32 state;
- for ( state = 1 ; state < trie->statecount-1 ; state++ ) {
- U32 ofs = 0;
- I32 idx = -1;
- U32 count = 0;
- const U32 base = trie->states[ state ].trans.base;
-
- if ( trie->states[state].wordnum )
- count = 1;
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- if ( ++count > 1 ) {
- SV **tmp = av_fetch( revcharmap, ofs, 0);
- const U8 *ch = (U8*)SvPV_nolen_const( *tmp );
- if ( state == 1 ) break;
- if ( count == 2 ) {
- Zero(trie->bitmap, ANYOF_BITMAP_SIZE, char);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*sNew Start State=%"UVuf" Class: [",
- (int)depth * 2 + 2, "",
- (UV)state));
- if (idx >= 0) {
- SV ** const tmp = av_fetch( revcharmap, idx, 0);
- const U8 * const ch = (U8*)SvPV_nolen_const( *tmp );
-
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie, folder[ *ch ]);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%s", (char*)ch)
- );
- }
- }
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie,folder[ *ch ]);
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"%s", ch));
- }
- idx = ofs;
- }
- }
- if ( count == 1 ) {
- SV **tmp = av_fetch( revcharmap, idx, 0);
- STRLEN len;
- char *ch = SvPV( *tmp, len );
- DEBUG_OPTIMISE_r({
- SV *sv=sv_newmortal();
- PerlIO_printf( Perl_debug_log,
- "%*sPrefix State: %"UVuf" Idx:%"UVuf" Char='%s'\n",
- (int)depth * 2 + 2, "",
- (UV)state, (UV)idx,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 6,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- });
- if ( state==1 ) {
- OP( convert ) = nodetype;
- str=STRING(convert);
- STR_LEN(convert)=0;
- }
- STR_LEN(convert) += len;
- while (len--)
- *str++ = *ch++;
- } else {
-#ifdef DEBUGGING
- if (state>1)
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"]\n"));
-#endif
- break;
- }
- }
- if (str) {
- regnode *n = convert+NODE_SZ_STR(convert);
- NEXT_OFF(convert) = NODE_SZ_STR(convert);
- trie->startstate = state;
- trie->minlen -= (state - 1);
- trie->maxlen -= (state - 1);
-#ifdef DEBUGGING
- /* At least the UNICOS C compiler choked on this
- * being argument to DEBUG_r(), so let's just have
- * it right here. */
- if (
-#ifdef PERL_EXT_RE_BUILD
- 1
-#else
- DEBUG_r_TEST
-#endif
- ) {
- regnode *fix = convert;
- U32 word = trie->wordcount;
- mjd_nodelen++;
- Set_Node_Offset_Length(convert, mjd_offset, state - 1);
- while( ++fix < n ) {
- Set_Node_Offset_Length(fix, 0, 0);
- }
- while (word--) {
- SV ** const tmp = av_fetch( trie_words, word, 0 );
- if (tmp) {
- if ( STR_LEN(convert) <= SvCUR(*tmp) )
- sv_chop(*tmp, SvPV_nolen(*tmp) + STR_LEN(convert));
- else
- sv_chop(*tmp, SvPV_nolen(*tmp) + SvCUR(*tmp));
- }
- }
- }
-#endif
- if (trie->maxlen) {
- convert = n;
- } else {
- NEXT_OFF(convert) = (U16)(tail - convert);
- DEBUG_r(optimize= n);
- }
- }
- }
- if (!jumper)
- jumper = last;
- if ( trie->maxlen ) {
- NEXT_OFF( convert ) = (U16)(tail - convert);
- ARG_SET( convert, data_slot );
- /* Store the offset to the first unabsorbed branch in
- jump[0], which is otherwise unused by the jump logic.
- We use this when dumping a trie and during optimisation. */
- if (trie->jump)
- trie->jump[0] = (U16)(nextbranch - convert);
-
- /* XXXX */
- if ( !trie->states[trie->startstate].wordnum && trie->bitmap &&
- ( (char *)jumper - (char *)convert) >= (int)sizeof(struct regnode_charclass) )
- {
- OP( convert ) = TRIEC;
- Copy(trie->bitmap, ((struct regnode_charclass *)convert)->bitmap, ANYOF_BITMAP_SIZE, char);
- PerlMemShared_free(trie->bitmap);
- trie->bitmap= NULL;
- } else
- OP( convert ) = TRIE;
-
- /* store the type in the flags */
- convert->flags = nodetype;
- DEBUG_r({
- optimize = convert
- + NODE_STEP_REGNODE
- + regarglen[ OP( convert ) ];
- });
- /* XXX We really should free up the resource in trie now,
- as we won't use them - (which resources?) dmq */
- }
- /* needed for dumping*/
- DEBUG_r(if (optimize) {
- regnode *opt = convert;
-
- while ( ++opt < optimize) {
- Set_Node_Offset_Length(opt,0,0);
- }
- /*
- Try to clean up some of the debris left after the
- optimisation.
- */
- while( optimize < jumper ) {
- mjd_nodelen += Node_Length((optimize));
- OP( optimize ) = OPTIMIZED;
- Set_Node_Offset_Length(optimize,0,0);
- optimize++;
- }
- Set_Node_Offset_Length(convert,mjd_offset,mjd_nodelen);
- });
- } /* end node insert */
- RExC_rxi->data->data[ data_slot + 1 ] = (void*)widecharmap;
-#ifdef DEBUGGING
- RExC_rxi->data->data[ data_slot + TRIE_WORDS_OFFSET ] = (void*)trie_words;
- RExC_rxi->data->data[ data_slot + 3 ] = (void*)revcharmap;
-#else
- SvREFCNT_dec(revcharmap);
-#endif
- return trie->jump
- ? MADE_JUMP_TRIE
- : trie->startstate>1
- ? MADE_EXACT_TRIE
- : MADE_TRIE;
-}
-
-STATIC void
-S_make_trie_failtable(pTHX_ RExC_state_t *pRExC_state, regnode *source, regnode *stclass, U32 depth)
-{
-/* The Trie is constructed and compressed now so we can build a fail array now if its needed
-
- This is basically the Aho-Corasick algorithm. Its from exercise 3.31 and 3.32 in the
- "Red Dragon" -- Compilers, principles, techniques, and tools. Aho, Sethi, Ullman 1985/88
- ISBN 0-201-10088-6
-
- We find the fail state for each state in the trie, this state is the longest proper
- suffix of the current states 'word' that is also a proper prefix of another word in our
- trie. State 1 represents the word '' and is the thus the default fail state. This allows
- the DFA not to have to restart after its tried and failed a word at a given point, it
- simply continues as though it had been matching the other word in the first place.
- Consider
- 'abcdgu'=~/abcdefg|cdgu/
- When we get to 'd' we are still matching the first word, we would encounter 'g' which would
- fail, which would bring use to the state representing 'd' in the second word where we would
- try 'g' and succeed, prodceding to match 'cdgu'.
- */
- /* add a fail transition */
- const U32 trie_offset = ARG(source);
- reg_trie_data *trie=(reg_trie_data *)RExC_rxi->data->data[trie_offset];
- U32 *q;
- const U32 ucharcount = trie->uniquecharcount;
- const U32 numstates = trie->statecount;
- const U32 ubound = trie->lasttrans + ucharcount;
- U32 q_read = 0;
- U32 q_write = 0;
- U32 charid;
- U32 base = trie->states[ 1 ].trans.base;
- U32 *fail;
- reg_ac_data *aho;
- const U32 data_slot = add_data( pRExC_state, 1, "T" );
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE_FAILTABLE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
-
- ARG_SET( stclass, data_slot );
- aho = (reg_ac_data *) PerlMemShared_calloc( 1, sizeof(reg_ac_data) );
- RExC_rxi->data->data[ data_slot ] = (void*)aho;
- aho->trie=trie_offset;
- aho->states=(reg_trie_state *)PerlMemShared_malloc( numstates * sizeof(reg_trie_state) );
- Copy( trie->states, aho->states, numstates, reg_trie_state );
- Newxz( q, numstates, U32);
- aho->fail = (U32 *) PerlMemShared_calloc( numstates, sizeof(U32) );
- aho->refcount = 1;
- fail = aho->fail;
- /* initialize fail[0..1] to be 1 so that we always have
- a valid final fail state */
- fail[ 0 ] = fail[ 1 ] = 1;
-
- for ( charid = 0; charid < ucharcount ; charid++ ) {
- const U32 newstate = TRIE_TRANS_STATE( 1, base, ucharcount, charid, 0 );
- if ( newstate ) {
- q[ q_write ] = newstate;
- /* set to point at the root */
- fail[ q[ q_write++ ] ]=1;
- }
- }
- while ( q_read < q_write) {
- const U32 cur = q[ q_read++ % numstates ];
- base = trie->states[ cur ].trans.base;
-
- for ( charid = 0 ; charid < ucharcount ; charid++ ) {
- const U32 ch_state = TRIE_TRANS_STATE( cur, base, ucharcount, charid, 1 );
- if (ch_state) {
- U32 fail_state = cur;
- U32 fail_base;
- do {
- fail_state = fail[ fail_state ];
- fail_base = aho->states[ fail_state ].trans.base;
- } while ( !TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ) );
-
- fail_state = TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 );
- fail[ ch_state ] = fail_state;
- if ( !aho->states[ ch_state ].wordnum && aho->states[ fail_state ].wordnum )
- {
- aho->states[ ch_state ].wordnum = aho->states[ fail_state ].wordnum;
- }
- q[ q_write++ % numstates] = ch_state;
- }
- }
- }
- /* restore fail[0..1] to 0 so that we "fall out" of the AC loop
- when we fail in state 1, this allows us to use the
- charclass scan to find a valid start char. This is based on the principle
- that theres a good chance the string being searched contains lots of stuff
- that cant be a start char.
- */
- fail[ 0 ] = fail[ 1 ] = 0;
- DEBUG_TRIE_COMPILE_r({
- PerlIO_printf(Perl_debug_log,
- "%*sStclass Failtable (%"UVuf" states): 0",
- (int)(depth * 2), "", (UV)numstates
- );
- for( q_read=1; q_read<numstates; q_read++ ) {
- PerlIO_printf(Perl_debug_log, ", %"UVuf, (UV)fail[q_read]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
- Safefree(q);
- /*RExC_seen |= REG_SEEN_TRIEDFA;*/
-}
-
-
-/*
- * There are strange code-generation bugs caused on sparc64 by gcc-2.95.2.
- * These need to be revisited when a newer toolchain becomes available.
- */
-#if defined(__sparc64__) && defined(__GNUC__)
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
-# undef SPARC64_GCC_WORKAROUND
-# define SPARC64_GCC_WORKAROUND 1
-# endif
-#endif
-
-#define DEBUG_PEEP(str,scan,depth) \
- DEBUG_OPTIMISE_r({if (scan){ \
- SV * const mysv=sv_newmortal(); \
- regnode *Next = regnext(scan); \
- regprop(RExC_rx, mysv, scan); \
- PerlIO_printf(Perl_debug_log, "%*s" str ">%3d: %s (%d)\n", \
- (int)depth*2, "", REG_NODE_NUM(scan), SvPV_nolen_const(mysv),\
- Next ? (REG_NODE_NUM(Next)) : 0 ); \
- }});
-
-
-
-
-
-#define JOIN_EXACT(scan,min,flags) \
- if (PL_regkind[OP(scan)] == EXACT) \
- join_exact(pRExC_state,(scan),(min),(flags),NULL,depth+1)
-
-STATIC U32
-S_join_exact(pTHX_ RExC_state_t *pRExC_state, regnode *scan, I32 *min, U32 flags,regnode *val, U32 depth) {
- /* Merge several consecutive EXACTish nodes into one. */
- regnode *n = regnext(scan);
- U32 stringok = 1;
- regnode *next = scan + NODE_SZ_STR(scan);
- U32 merged = 0;
- U32 stopnow = 0;
-#ifdef DEBUGGING
- regnode *stop = scan;
- GET_RE_DEBUG_FLAGS_DECL;
-#else
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_JOIN_EXACT;
-#ifndef EXPERIMENTAL_INPLACESCAN
- PERL_UNUSED_ARG(flags);
- PERL_UNUSED_ARG(val);
-#endif
- DEBUG_PEEP("join",scan,depth);
-
- /* Skip NOTHING, merge EXACT*. */
- while (n &&
- ( PL_regkind[OP(n)] == NOTHING ||
- (stringok && (OP(n) == OP(scan))))
- && NEXT_OFF(n)
- && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) {
-
- if (OP(n) == TAIL || n > next)
- stringok = 0;
- if (PL_regkind[OP(n)] == NOTHING) {
- DEBUG_PEEP("skip:",n,depth);
- NEXT_OFF(scan) += NEXT_OFF(n);
- next = n + NODE_STEP_REGNODE;
-#ifdef DEBUGGING
- if (stringok)
- stop = n;
-#endif
- n = regnext(n);
- }
- else if (stringok) {
- const unsigned int oldl = STR_LEN(scan);
- regnode * const nnext = regnext(n);
-
- DEBUG_PEEP("merg",n,depth);
-
- merged++;
- if (oldl + STR_LEN(n) > U8_MAX)
- break;
- NEXT_OFF(scan) += NEXT_OFF(n);
- STR_LEN(scan) += STR_LEN(n);
- next = n + NODE_SZ_STR(n);
- /* Now we can overwrite *n : */
- Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char);
-#ifdef DEBUGGING
- stop = next - 1;
-#endif
- n = nnext;
- if (stopnow) break;
- }
-
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (flags && !NEXT_OFF(n)) {
- DEBUG_PEEP("atch", val, depth);
- if (reg_off_by_arg[OP(n)]) {
- ARG_SET(n, val - n);
- }
- else {
- NEXT_OFF(n) = val - n;
- }
- stopnow = 1;
- }
-#endif
- }
-
- if (UTF && ( OP(scan) == EXACTF ) && ( STR_LEN(scan) >= 6 ) ) {
- /*
- Two problematic code points in Unicode casefolding of EXACT nodes:
-
- U+0390 - GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS
- U+03B0 - GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS
-
- which casefold to
-
- Unicode UTF-8
-
- U+03B9 U+0308 U+0301 0xCE 0xB9 0xCC 0x88 0xCC 0x81
- U+03C5 U+0308 U+0301 0xCF 0x85 0xCC 0x88 0xCC 0x81
-
- This means that in case-insensitive matching (or "loose matching",
- as Unicode calls it), an EXACTF of length six (the UTF-8 encoded byte
- length of the above casefolded versions) can match a target string
- of length two (the byte length of UTF-8 encoded U+0390 or U+03B0).
- This would rather mess up the minimum length computation.
-
- What we'll do is to look for the tail four bytes, and then peek
- at the preceding two bytes to see whether we need to decrease
- the minimum length by four (six minus two).
-
- Thanks to the design of UTF-8, there cannot be false matches:
- A sequence of valid UTF-8 bytes cannot be a subsequence of
- another valid sequence of UTF-8 bytes.
-
- */
- char * const s0 = STRING(scan), *s, *t;
- char * const s1 = s0 + STR_LEN(scan) - 1;
- char * const s2 = s1 - 4;
-#ifdef EBCDIC /* RD tunifold greek 0390 and 03B0 */
- const char t0[] = "\xaf\x49\xaf\x42";
-#else
- const char t0[] = "\xcc\x88\xcc\x81";
-#endif
- const char * const t1 = t0 + 3;
-
- for (s = s0 + 2;
- s < s2 && (t = ninstr(s, s1, t0, t1));
- s = t + 4) {
-#ifdef EBCDIC
- if (((U8)t[-1] == 0x68 && (U8)t[-2] == 0xB4) ||
- ((U8)t[-1] == 0x46 && (U8)t[-2] == 0xB5))
-#else
- if (((U8)t[-1] == 0xB9 && (U8)t[-2] == 0xCE) ||
- ((U8)t[-1] == 0x85 && (U8)t[-2] == 0xCF))
-#endif
- *min -= 4;
- }
- }
-
-#ifdef DEBUGGING
- /* Allow dumping */
- n = scan + NODE_SZ_STR(scan);
- while (n <= stop) {
- if (PL_regkind[OP(n)] != NOTHING || OP(n) == NOTHING) {
- OP(n) = OPTIMIZED;
- NEXT_OFF(n) = 0;
- }
- n++;
- }
-#endif
- DEBUG_OPTIMISE_r(if (merged){DEBUG_PEEP("finl",scan,depth)});
- return stopnow;
-}
-
-/* REx optimizer. Converts nodes into quickier variants "in place".
- Finds fixed substrings. */
-
-/* Stops at toplevel WHILEM as well as at "last". At end *scanp is set
- to the position after last scanned or to NULL. */
-
-#define INIT_AND_WITHP \
- assert(!and_withp); \
- Newx(and_withp,1,struct regnode_charclass_class); \
- SAVEFREEPV(and_withp)
-
-/* this is a chain of data about sub patterns we are processing that
- need to be handled seperately/specially in study_chunk. Its so
- we can simulate recursion without losing state. */
-struct scan_frame;
-typedef struct scan_frame {
- regnode *last; /* last node to process in this frame */
- regnode *next; /* next node to process when last is reached */
- struct scan_frame *prev; /*previous frame*/
- I32 stop; /* what stopparen do we use */
-} scan_frame;
-
-
-#define SCAN_COMMIT(s, data, m) scan_commit(s, data, m, is_inf)
-
-#define CASE_SYNST_FNC(nAmE) \
-case nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break; \
-case N ## nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break
-
-
-
-STATIC I32
-S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp,
- I32 *minlenp, I32 *deltap,
- regnode *last,
- scan_data_t *data,
- I32 stopparen,
- U8* recursed,
- struct regnode_charclass_class *and_withp,
- U32 flags, U32 depth)
- /* scanp: Start here (read-write). */
- /* deltap: Write maxlen-minlen here. */
- /* last: Stop before this one. */
- /* data: string data about the pattern */
- /* stopparen: treat close N as END */
- /* recursed: which subroutines have we recursed into */
- /* and_withp: Valid if flags & SCF_DO_STCLASS_OR */
-{
- dVAR;
- I32 min = 0, pars = 0, code;
- regnode *scan = *scanp, *next;
- I32 delta = 0;
- int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF);
- int is_inf_internal = 0; /* The studied chunk is infinite */
- I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0;
- scan_data_t data_fake;
- SV *re_trie_maxbuff = NULL;
- regnode *first_non_open = scan;
- I32 stopmin = I32_MAX;
- scan_frame *frame = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_STUDY_CHUNK;
-
-#ifdef DEBUGGING
- StructCopy(&zero_scan_data, &data_fake, scan_data_t);
-#endif
-
- if ( depth == 0 ) {
- while (first_non_open && OP(first_non_open) == OPEN)
- first_non_open=regnext(first_non_open);
- }
-
-
- fake_study_recurse:
- while ( scan && OP(scan) != END && scan < last ){
- /* Peephole optimizer: */
- DEBUG_STUDYDATA("Peep:", data,depth);
- DEBUG_PEEP("Peep",scan,depth);
- JOIN_EXACT(scan,&min,0);
-
- /* Follow the next-chain of the current node and optimize
- away all the NOTHINGs from it. */
- if (OP(scan) != CURLYX) {
- const int max = (reg_off_by_arg[OP(scan)]
- ? I32_MAX
- /* I32 may be smaller than U16 on CRAYs! */
- : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX));
- int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan));
- int noff;
- regnode *n = scan;
-
- /* Skip NOTHING and LONGJMP. */
- while ((n = regnext(n))
- && ((PL_regkind[OP(n)] == NOTHING && (noff = NEXT_OFF(n)))
- || ((OP(n) == LONGJMP) && (noff = ARG(n))))
- && off + noff < max)
- off += noff;
- if (reg_off_by_arg[OP(scan)])
- ARG(scan) = off;
- else
- NEXT_OFF(scan) = off;
- }
-
-
-
- /* The principal pseudo-switch. Cannot be a switch, since we
- look into several different things. */
- if (OP(scan) == BRANCH || OP(scan) == BRANCHJ
- || OP(scan) == IFTHEN) {
- next = regnext(scan);
- code = OP(scan);
- /* demq: the op(next)==code check is to see if we have "branch-branch" AFAICT */
-
- if (OP(next) == code || code == IFTHEN) {
- /* NOTE - There is similar code to this block below for handling
- TRIE nodes on a re-study. If you change stuff here check there
- too. */
- I32 max1 = 0, min1 = I32_MAX, num = 0;
- struct regnode_charclass_class accum;
- regnode * const startbranch=scan;
-
- if (flags & SCF_DO_SUBSTR)
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- while (OP(scan) == code) {
- I32 deltanext, minnext, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- num++;
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
-
- data_fake.pos_delta = delta;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- if (code != BRANCH)
- scan = NEXTOPER(scan);
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- /* we suppose the run is continuous, last=next...*/
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- next, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- if (min1 > minnext)
- min1 = minnext;
- if (max1 < minnext + deltanext)
- max1 = minnext + deltanext;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
- scan = next;
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > minnext)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- if (code == IFTHEN && num < 2) /* Empty ELSE branch */
- min1 = 0;
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
-
- if (PERL_ENABLE_TRIE_OPTIMISATION && OP( startbranch ) == BRANCH ) {
- /* demq.
-
- Assuming this was/is a branch we are dealing with: 'scan' now
- points at the item that follows the branch sequence, whatever
- it is. We now start at the beginning of the sequence and look
- for subsequences of
-
- BRANCH->EXACT=>x1
- BRANCH->EXACT=>x2
- tail
-
- which would be constructed from a pattern like /A|LIST|OF|WORDS/
-
- If we can find such a subseqence we need to turn the first
- element into a trie and then add the subsequent branch exact
- strings to the trie.
-
- We have two cases
-
- 1. patterns where the whole set of branch can be converted.
-
- 2. patterns where only a subset can be converted.
-
- In case 1 we can replace the whole set with a single regop
- for the trie. In case 2 we need to keep the start and end
- branchs so
-
- 'BRANCH EXACT; BRANCH EXACT; BRANCH X'
- becomes BRANCH TRIE; BRANCH X;
-
- There is an additional case, that being where there is a
- common prefix, which gets split out into an EXACT like node
- preceding the TRIE node.
-
- If x(1..n)==tail then we can do a simple trie, if not we make
- a "jump" trie, such that when we match the appropriate word
- we "jump" to the appopriate tail node. Essentailly we turn
- a nested if into a case structure of sorts.
-
- */
-
- int made=0;
- if (!re_trie_maxbuff) {
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff))
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- if ( SvIV(re_trie_maxbuff)>=0 ) {
- regnode *cur;
- regnode *first = (regnode *)NULL;
- regnode *last = (regnode *)NULL;
- regnode *tail = scan;
- U8 optype = 0;
- U32 count=0;
-
-#ifdef DEBUGGING
- SV * const mysv = sv_newmortal(); /* for dumping */
-#endif
- /* var tail is used because there may be a TAIL
- regop in the way. Ie, the exacts will point to the
- thing following the TAIL, but the last branch will
- point at the TAIL. So we advance tail. If we
- have nested (?:) we may have to move through several
- tails.
- */
-
- while ( OP( tail ) == TAIL ) {
- /* this is the TAIL generated by (?:) */
- tail = regnext( tail );
- }
-
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, tail );
- PerlIO_printf( Perl_debug_log, "%*s%s%s\n",
- (int)depth * 2 + 2, "",
- "Looking for TRIE'able sequences. Tail node is: ",
- SvPV_nolen_const( mysv )
- );
- });
-
- /*
-
- step through the branches, cur represents each
- branch, noper is the first thing to be matched
- as part of that branch and noper_next is the
- regnext() of that node. if noper is an EXACT
- and noper_next is the same as scan (our current
- position in the regex) then the EXACT branch is
- a possible optimization target. Once we have
- two or more consequetive such branches we can
- create a trie of the EXACT's contents and stich
- it in place. If the sequence represents all of
- the branches we eliminate the whole thing and
- replace it with a single TRIE. If it is a
- subsequence then we need to stitch it in. This
- means the first branch has to remain, and needs
- to be repointed at the item on the branch chain
- following the last branch optimized. This could
- be either a BRANCH, in which case the
- subsequence is internal, or it could be the
- item following the branch sequence in which
- case the subsequence is at the end.
-
- */
-
- /* dont use tail as the end marker for this traverse */
- for ( cur = startbranch ; cur != scan ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
-#if defined(DEBUGGING) || defined(NOJUMPTRIE)
- regnode * const noper_next = regnext( noper );
-#endif
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log, "%*s- %s (%d)",
- (int)depth * 2 + 2,"", SvPV_nolen_const( mysv ), REG_NODE_NUM(cur) );
-
- regprop(RExC_rx, mysv, noper);
- PerlIO_printf( Perl_debug_log, " -> %s",
- SvPV_nolen_const(mysv));
-
- if ( noper_next ) {
- regprop(RExC_rx, mysv, noper_next );
- PerlIO_printf( Perl_debug_log,"\t=> %s\t",
- SvPV_nolen_const(mysv));
- }
- PerlIO_printf( Perl_debug_log, "(First==%d,Last==%d,Cur==%d)\n",
- REG_NODE_NUM(first), REG_NODE_NUM(last), REG_NODE_NUM(cur) );
- });
- if ( (((first && optype!=NOTHING) ? OP( noper ) == optype
- : PL_regkind[ OP( noper ) ] == EXACT )
- || OP(noper) == NOTHING )
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- && count < U16_MAX)
- {
- count++;
- if ( !first || optype == NOTHING ) {
- if (!first) first = cur;
- optype = OP( noper );
- } else {
- last = cur;
- }
- } else {
-/*
- Currently we assume that the trie can handle unicode and ascii
- matches fold cased matches. If this proves true then the following
- define will prevent tries in this situation.
-
- #define TRIE_TYPE_IS_SAFE (UTF || optype==EXACT)
-*/
-#define TRIE_TYPE_IS_SAFE 1
- if ( last && TRIE_TYPE_IS_SAFE ) {
- make_trie( pRExC_state,
- startbranch, first, cur, tail, count,
- optype, depth+1 );
- }
- if ( PL_regkind[ OP( noper ) ] == EXACT
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- ){
- count = 1;
- first = cur;
- optype = OP( noper );
- } else {
- count = 0;
- first = NULL;
- optype = 0;
- }
- last = NULL;
- }
- }
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log,
- "%*s- %s (%d) <SCAN FINISHED>\n", (int)depth * 2 + 2,
- "", SvPV_nolen_const( mysv ),REG_NODE_NUM(cur));
-
- });
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- made= make_trie( pRExC_state, startbranch, first, scan, tail, count, optype, depth+1 );
-#ifdef TRIE_STUDY_OPT
- if ( ((made == MADE_EXACT_TRIE &&
- startbranch == first)
- || ( first_non_open == first )) &&
- depth==0 ) {
- flags |= SCF_TRIE_RESTUDY;
- if ( startbranch == first
- && scan == tail )
- {
- RExC_seen &=~REG_TOP_LEVEL_BRANCHES;
- }
- }
-#endif
- }
- }
-
- } /* do trie */
-
- }
- else if ( code == BRANCHJ ) { /* single branch is optimized. */
- scan = NEXTOPER(NEXTOPER(scan));
- } else /* single branch is optimized. */
- scan = NEXTOPER(scan);
- continue;
- } else if (OP(scan) == SUSPEND || OP(scan) == GOSUB || OP(scan) == GOSTART) {
- scan_frame *newframe = NULL;
- I32 paren;
- regnode *start;
- regnode *end;
-
- if (OP(scan) != SUSPEND) {
- /* set the pointer */
- if (OP(scan) == GOSUB) {
- paren = ARG(scan);
- RExC_recurse[ARG2L(scan)] = scan;
- start = RExC_open_parens[paren-1];
- end = RExC_close_parens[paren-1];
- } else {
- paren = 0;
- start = RExC_rxi->program + 1;
- end = RExC_opend;
- }
- if (!recursed) {
- Newxz(recursed, (((RExC_npar)>>3) +1), U8);
- SAVEFREEPV(recursed);
- }
- if (!PAREN_TEST(recursed,paren+1)) {
- PAREN_SET(recursed,paren+1);
- Newx(newframe,1,scan_frame);
- } else {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- } else {
- Newx(newframe,1,scan_frame);
- paren = stopparen;
- start = scan+2;
- end = regnext(scan);
- }
- if (newframe) {
- assert(start);
- assert(end);
- SAVEFREEPV(newframe);
- newframe->next = regnext(scan);
- newframe->last = last;
- newframe->stop = stopparen;
- newframe->prev = frame;
-
- frame = newframe;
- scan = start;
- stopparen = paren;
- last = end;
-
- continue;
- }
- }
- else if (OP(scan) == EXACT) {
- I32 l = STR_LEN(scan);
- UV uc;
- if (UTF) {
- const U8 * const s = (U8*)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- } else {
- uc = *((U8*)STRING(scan));
- }
- min += l;
- if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */
- /* The code below prefers earlier match for fixed
- offset, later match for variable offset. */
- if (data->last_end == -1) { /* Update the start info. */
- data->last_start_min = data->pos_min;
- data->last_start_max = is_inf
- ? I32_MAX : data->pos_min + data->pos_delta;
- }
- sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan));
- if (UTF)
- SvUTF8_on(data->last_found);
- {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += utf8_length((U8*)STRING(scan),
- (U8*)STRING(scan)+STR_LEN(scan));
- }
- data->last_end = data->pos_min + l;
- data->pos_min += l; /* As in the first entry. */
- data->flags &= ~SF_BEFORE_EOL;
- }
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && (!(data->start_class->flags & ANYOF_FOLD)
- || !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- )
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- if (uc < 0x100)
- data->start_class->flags &= ~ANYOF_UNICODE_ALL;
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- /* false positive possible if the class is case-folded */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- else
- data->start_class->flags |= ANYOF_UNICODE_ALL;
- data->start_class->flags &= ~ANYOF_EOS;
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (PL_regkind[OP(scan)] == EXACT) { /* But OP != EXACT! */
- I32 l = STR_LEN(scan);
- UV uc = *((U8*)STRING(scan));
-
- /* Search for fixed substrings supports EXACT only. */
- if (flags & SCF_DO_SUBSTR) {
- assert(data);
- SCAN_COMMIT(pRExC_state, data, minlenp);
- }
- if (UTF) {
- const U8 * const s = (U8 *)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- }
- min += l;
- if (flags & SCF_DO_SUBSTR)
- data->pos_min += l;
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat) {
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- data->start_class->flags |= ANYOF_FOLD;
- if (OP(scan) == EXACTFL)
- data->start_class->flags |= ANYOF_LOCALE;
- }
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- if (data->start_class->flags & ANYOF_FOLD) {
- /* false positive possible if the class is case-folded.
- Assume that the locale settings are the same... */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- }
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (strchr((const char*)PL_varies,OP(scan))) {
- I32 mincount, maxcount, minnext, deltanext, fl = 0;
- I32 f = flags, pos_before = 0;
- regnode * const oscan = scan;
- struct regnode_charclass_class this_class;
- struct regnode_charclass_class *oclass = NULL;
- I32 next_is_eval = 0;
-
- switch (PL_regkind[OP(scan)]) {
- case WHILEM: /* End of (?:...)* . */
- scan = NEXTOPER(scan);
- goto finish;
- case PLUS:
- if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) {
- next = NEXTOPER(scan);
- if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) {
- mincount = 1;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- }
- if (flags & SCF_DO_SUBSTR)
- data->pos_min++;
- min++;
- /* Fall through. */
- case STAR:
- if (flags & SCF_DO_STCLASS) {
- mincount = 0;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- is_inf = is_inf_internal = 1;
- scan = regnext(scan);
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot extend fixed substrings */
- data->longest = &(data->longest_float);
- }
- goto optimize_curly_tail;
- case CURLY:
- if (stopparen>0 && (OP(scan)==CURLYN || OP(scan)==CURLYM)
- && (scan->flags == stopparen))
- {
- mincount = 1;
- maxcount = 1;
- } else {
- mincount = ARG1(scan);
- maxcount = ARG2(scan);
- }
- next = regnext(scan);
- if (OP(scan) == CURLYX) {
- I32 lp = (data ? *(data->last_closep) : 0);
- scan->flags = ((lp <= (I32)U8_MAX) ? (U8)lp : U8_MAX);
- }
- scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- next_is_eval = (OP(scan) == EVAL);
- do_curly:
- if (flags & SCF_DO_SUBSTR) {
- if (mincount == 0) SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot extend fixed substrings */
- pos_before = data->pos_min;
- }
- if (data) {
- fl = data->flags;
- data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL);
- if (is_inf)
- data->flags |= SF_IS_INF;
- }
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- oclass = data->start_class;
- data->start_class = &this_class;
- f |= SCF_DO_STCLASS_AND;
- f &= ~SCF_DO_STCLASS_OR;
- }
- /* These are the cases when once a subexpression
- fails at a particular position, it cannot succeed
- even after backtracking at the enclosing scope.
-
- XXXX what if minimal match and we are at the
- initial run of {n,m}? */
- if ((mincount != maxcount - 1) && (maxcount != REG_INFTY))
- f &= ~SCF_WHILEM_VISITED_POS;
-
- /* This will finish on WHILEM, setting scan, or on NULL: */
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- last, data, stopparen, recursed, NULL,
- (mincount == 0
- ? (f & ~SCF_DO_SUBSTR) : f),depth+1);
-
- if (flags & SCF_DO_STCLASS)
- data->start_class = oclass;
- if (mincount == 0 || minnext == 0) {
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&this_class, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- } else { /* Non-zero len */
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- cl_and(data->start_class, and_withp);
- }
- else if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class, &this_class);
- flags &= ~SCF_DO_STCLASS;
- }
- if (!scan) /* It was not CURLYX, but CURLY. */
- scan = next;
- if ( /* ? quantifier ok, except for (?{ ... }) */
- (next_is_eval || !(mincount == 0 && maxcount == 1))
- && (minnext == 0) && (deltanext == 0)
- && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR))
- && maxcount <= REG_INFTY/3 /* Complement check for big count */
- && ckWARN(WARN_REGEXP))
- {
- vWARN(RExC_parse,
- "Quantifier unexpected on zero-length expression");
- }
-
- min += minnext * mincount;
- is_inf_internal |= ((maxcount == REG_INFTY
- && (minnext + deltanext) > 0)
- || deltanext == I32_MAX);
- is_inf |= is_inf_internal;
- delta += (minnext + deltanext) * maxcount - minnext * mincount;
-
- /* Try powerful optimization CURLYX => CURLYN. */
- if ( OP(oscan) == CURLYX && data
- && data->flags & SF_IN_PAR
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext && minnext == 1 ) {
- /* Try to optimize to CURLYN. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS;
- regnode * const nxt1 = nxt;
-#ifdef DEBUGGING
- regnode *nxt2;
-#endif
-
- /* Skip open. */
- nxt = regnext(nxt);
- if (!strchr((const char*)PL_simple,OP(nxt))
- && !(PL_regkind[OP(nxt)] == EXACT
- && STR_LEN(nxt) == 1))
- goto nogo;
-#ifdef DEBUGGING
- nxt2 = nxt;
-#endif
- nxt = regnext(nxt);
- if (OP(nxt) != CLOSE)
- goto nogo;
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt+2; /*close->while*/
- }
- /* Now we know that nxt2 is the only contents: */
- oscan->flags = (U8)ARG(nxt);
- OP(oscan) = CURLYN;
- OP(nxt1) = NOTHING; /* was OPEN. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */
-#endif
- }
- nogo:
-
- /* Try optimization CURLYX => CURLYM. */
- if ( OP(oscan) == CURLYX && data
- && !(data->flags & SF_HAS_PAR)
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext /* atom is fixed width */
- && minnext != 0 /* CURLYM can't handle zero width */
- ) {
- /* XXXX How to optimize if data == 0? */
- /* Optimize to a simpler form. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */
- regnode *nxt2;
-
- OP(oscan) = CURLYM;
- while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/
- && (OP(nxt2) != WHILEM))
- nxt = nxt2;
- OP(nxt2) = SUCCEED; /* Whas WHILEM */
- /* Need to optimize away parenths. */
- if (data->flags & SF_IN_PAR) {
- /* Set the parenth number. */
- regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/
-
- if (OP(nxt) != CLOSE)
- FAIL("Panic opt close");
- oscan->flags = (U8)ARG(nxt);
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt2+1; /*close->NOTHING*/
- }
- OP(nxt1) = OPTIMIZED; /* was OPEN. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */
-#endif
-#if 0
- while ( nxt1 && (OP(nxt1) != WHILEM)) {
- regnode *nnxt = regnext(nxt1);
-
- if (nnxt == nxt) {
- if (reg_off_by_arg[OP(nxt1)])
- ARG_SET(nxt1, nxt2 - nxt1);
- else if (nxt2 - nxt1 < U16_MAX)
- NEXT_OFF(nxt1) = nxt2 - nxt1;
- else
- OP(nxt) = NOTHING; /* Cannot beautify */
- }
- nxt1 = nnxt;
- }
-#endif
- /* Optimize again: */
- study_chunk(pRExC_state, &nxt1, minlenp, &deltanext, nxt,
- NULL, stopparen, recursed, NULL, 0,depth+1);
- }
- else
- oscan->flags = 0;
- }
- else if ((OP(oscan) == CURLYX)
- && (flags & SCF_WHILEM_VISITED_POS)
- /* See the comment on a similar expression above.
- However, this time it not a subexpression
- we care about, but the expression itself. */
- && (maxcount == REG_INFTY)
- && data && ++data->whilem_c < 16) {
- /* This stays as CURLYX, we can put the count/of pair. */
- /* Find WHILEM (as in regexec.c) */
- regnode *nxt = oscan + NEXT_OFF(oscan);
-
- if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */
- nxt += ARG(nxt);
- PREVOPER(nxt)->flags = (U8)(data->whilem_c
- | (RExC_whilem_seen << 4)); /* On WHILEM */
- }
- if (data && fl & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (flags & SCF_DO_SUBSTR) {
- SV *last_str = NULL;
- int counted = mincount != 0;
-
- if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */
-#if defined(SPARC64_GCC_WORKAROUND)
- I32 b = 0;
- STRLEN l = 0;
- const char *s = NULL;
- I32 old = 0;
-
- if (pos_before >= data->last_start_min)
- b = pos_before;
- else
- b = data->last_start_min;
-
- l = 0;
- s = SvPV_const(data->last_found, l);
- old = b - data->last_start_min;
-
-#else
- I32 b = pos_before >= data->last_start_min
- ? pos_before : data->last_start_min;
- STRLEN l;
- const char * const s = SvPV_const(data->last_found, l);
- I32 old = b - data->last_start_min;
-#endif
-
- if (UTF)
- old = utf8_hop((U8*)s, old) - (U8*)s;
-
- l -= old;
- /* Get the added string: */
- last_str = newSVpvn_utf8(s + old, l, UTF);
- if (deltanext == 0 && pos_before == b) {
- /* What was added is a constant string */
- if (mincount > 1) {
- SvGROW(last_str, (mincount * l) + 1);
- repeatcpy(SvPVX(last_str) + l,
- SvPVX_const(last_str), l, mincount - 1);
- SvCUR_set(last_str, SvCUR(last_str) * mincount);
- /* Add additional parts. */
- SvCUR_set(data->last_found,
- SvCUR(data->last_found) - l);
- sv_catsv(data->last_found, last_str);
- {
- SV * sv = data->last_found;
- MAGIC *mg =
- SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += CHR_SVLEN(last_str) - l;
- }
- data->last_end += l * (mincount - 1);
- }
- } else {
- /* start offset must point into the last copy */
- data->last_start_min += minnext * (mincount - 1);
- data->last_start_max += is_inf ? I32_MAX
- : (maxcount - 1) * (minnext + data->pos_delta);
- }
- }
- /* It is counted once already... */
- data->pos_min += minnext * (mincount - counted);
- data->pos_delta += - counted * deltanext +
- (minnext + deltanext) * maxcount - minnext * mincount;
- if (mincount != maxcount) {
- /* Cannot extend fixed substrings found inside
- the group. */
- SCAN_COMMIT(pRExC_state,data,minlenp);
- if (mincount && last_str) {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
-
- if (mg)
- mg->mg_len = -1;
- sv_setsv(sv, last_str);
- data->last_end = data->pos_min;
- data->last_start_min =
- data->pos_min - CHR_SVLEN(last_str);
- data->last_start_max = is_inf
- ? I32_MAX
- : data->pos_min + data->pos_delta
- - CHR_SVLEN(last_str);
- }
- data->longest = &(data->longest_float);
- }
- SvREFCNT_dec(last_str);
- }
- if (data && (fl & SF_HAS_EVAL))
- data->flags |= SF_HAS_EVAL;
- optimize_curly_tail:
- if (OP(oscan) != CURLYX) {
- while (PL_regkind[OP(next = regnext(oscan))] == NOTHING
- && NEXT_OFF(next))
- NEXT_OFF(oscan) += NEXT_OFF(next);
- }
- continue;
- default: /* REF and CLUMP only? */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR)
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- break;
- }
- }
- else if (OP(scan) == LNBREAK) {
- if (flags & SCF_DO_STCLASS) {
- int value = 0;
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
- if (flags & SCF_DO_STCLASS_AND) {
- for (value = 0; value < 256; value++)
- if (!is_VERTWS_cp(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- for (value = 0; value < 256; value++)
- if (is_VERTWS_cp(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- min += 1;
- delta += 1;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += 1;
- data->longest = &(data->longest_float);
- }
-
- }
- else if (OP(scan) == FOLDCHAR) {
- int d = ARG(scan)==0xDF ? 1 : 2;
- flags &= ~SCF_DO_STCLASS;
- min += 1;
- delta += d;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += d;
- data->longest = &(data->longest_float);
- }
- }
- else if (strchr((const char*)PL_simple,OP(scan))) {
- int value = 0;
-
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->pos_min++;
- }
- min++;
- if (flags & SCF_DO_STCLASS) {
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
-
- /* Some of the logic below assumes that switching
- locale on will only add false positives. */
- switch (PL_regkind[OP(scan)]) {
- case SANY:
- default:
- do_default:
- /* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- break;
- case REG_ANY:
- if (OP(scan) == SANY)
- goto do_default;
- if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */
- value = (ANYOF_BITMAP_TEST(data->start_class,'\n')
- || (data->start_class->flags & ANYOF_CLASS));
- cl_anything(pRExC_state, data->start_class);
- }
- if (flags & SCF_DO_STCLASS_AND || !value)
- ANYOF_BITMAP_CLEAR(data->start_class,'\n');
- break;
- case ANYOF:
- if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class,
- (struct regnode_charclass_class*)scan);
- else
- cl_or(pRExC_state, data->start_class,
- (struct regnode_charclass_class*)scan);
- break;
- case ALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case ALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- }
- else {
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- data->start_class->flags |= ANYOF_LOCALE;
- }
- break;
- case NALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- }
- break;
- case SPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- else {
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case SPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- }
- break;
- case NSPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- else {
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NSPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- }
- break;
- case DIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT);
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NDIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT);
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- CASE_SYNST_FNC(VERTWS);
- CASE_SYNST_FNC(HORIZWS);
-
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (PL_regkind[OP(scan)] == EOL && flags & SCF_DO_SUBSTR) {
- data->flags |= (OP(scan) == MEOL
- ? SF_BEFORE_MEOL
- : SF_BEFORE_SEOL);
- }
- else if ( PL_regkind[OP(scan)] == BRANCHJ
- /* Lookbehind, or need to calculate parens/evals/stclass: */
- && (scan->flags || data || (flags & SCF_DO_STCLASS))
- && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) {
- if ( !PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- || OP(scan) == UNLESSM )
- {
- /* Negative Lookahead/lookbehind
- In this case we can't do fixed string optimisation.
- */
-
- I32 deltanext, minnext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
- minnext = study_chunk(pRExC_state, &nscan, minlenp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f, depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (minnext > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)minnext;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (f & SCF_DO_STCLASS_AND) {
- if (flags & SCF_DO_STCLASS_OR) {
- /* OR before, AND after: ideally we would recurse with
- * data_fake to get the AND applied by study of the
- * remainder of the pattern, and then derecurse;
- * *** HACK *** for now just treat as "no information".
- * See [perl #56690].
- */
- cl_init(pRExC_state, data->start_class);
- } else {
- /* AND before and after: combine and continue */
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- }
-#if PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- else {
- /* Positive Lookahead/lookbehind
- In this case we can do fixed string optimisation,
- but we must be careful about it. Note in the case of
- lookbehind the positions will be offset by the minimum
- length of the pattern, something we won't know about
- until after the recurse.
- */
- I32 deltanext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
- /* We use SAVEFREEPV so that when the full compile
- is finished perl will clean up the allocated
- minlens when its all done. This was we don't
- have to worry about freeing them when we know
- they wont be used, which would be a pain.
- */
- I32 *minnextp;
- Newx( minnextp, 1, I32 );
- SAVEFREEPV(minnextp);
-
- if (data) {
- StructCopy(data, &data_fake, scan_data_t);
- if ((flags & SCF_DO_SUBSTR) && data->last_found) {
- f |= SCF_DO_SUBSTR;
- if (scan->flags)
- SCAN_COMMIT(pRExC_state, &data_fake,minlenp);
- data_fake.last_found=newSVsv(data->last_found);
- }
- }
- else
- data_fake.last_closep = &fake;
- data_fake.flags = 0;
- data_fake.pos_delta = delta;
- if (is_inf)
- data_fake.flags |= SF_IS_INF;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
-
- *minnextp = study_chunk(pRExC_state, &nscan, minnextp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f,depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (*minnextp > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)*minnextp;
- }
-
- *minnextp += min;
-
- if (f & SCF_DO_STCLASS_AND) {
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- if ((flags & SCF_DO_SUBSTR) && data_fake.last_found) {
- if (RExC_rx->minlen<*minnextp)
- RExC_rx->minlen=*minnextp;
- SCAN_COMMIT(pRExC_state, &data_fake, minnextp);
- SvREFCNT_dec(data_fake.last_found);
-
- if ( data_fake.minlen_fixed != minlenp )
- {
- data->offset_fixed= data_fake.offset_fixed;
- data->minlen_fixed= data_fake.minlen_fixed;
- data->lookbehind_fixed+= scan->flags;
- }
- if ( data_fake.minlen_float != minlenp )
- {
- data->minlen_float= data_fake.minlen_float;
- data->offset_float_min=data_fake.offset_float_min;
- data->offset_float_max=data_fake.offset_float_max;
- data->lookbehind_float+= scan->flags;
- }
- }
- }
-
-
- }
-#endif
- }
- else if (OP(scan) == OPEN) {
- if (stopparen != (I32)ARG(scan))
- pars++;
- }
- else if (OP(scan) == CLOSE) {
- if (stopparen == (I32)ARG(scan)) {
- break;
- }
- if ((I32)ARG(scan) == is_par) {
- next = regnext(scan);
-
- if ( next && (OP(next) != WHILEM) && next < last)
- is_par = 0; /* Disable optimization */
- }
- if (data)
- *(data->last_closep) = ARG(scan);
- }
- else if (OP(scan) == EVAL) {
- if (data)
- data->flags |= SF_HAS_EVAL;
- }
- else if ( PL_regkind[OP(scan)] == ENDLIKE ) {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- flags &= ~SCF_DO_SUBSTR;
- }
- if (data && OP(scan)==ACCEPT) {
- data->flags |= SCF_SEEN_ACCEPT;
- if (stopmin > min)
- stopmin = min;
- }
- }
- else if (OP(scan) == LOGICAL && scan->flags == 2) /* Embedded follows */
- {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- else if (OP(scan) == GPOS) {
- if (!(RExC_rx->extflags & RXf_GPOS_FLOAT) &&
- !(delta || is_inf || (data && data->pos_delta)))
- {
- if (!(RExC_rx->extflags & RXf_ANCH) && (flags & SCF_DO_SUBSTR))
- RExC_rx->extflags |= RXf_ANCH_GPOS;
- if (RExC_rx->gofs < (U32)min)
- RExC_rx->gofs = min;
- } else {
- RExC_rx->extflags |= RXf_GPOS_FLOAT;
- RExC_rx->gofs = 0;
- }
- }
-#ifdef TRIE_STUDY_OPT
-#ifdef FULL_TRIE_STUDY
- else if (PL_regkind[OP(scan)] == TRIE) {
- /* NOTE - There is similar code to this block above for handling
- BRANCH nodes on the initial study. If you change stuff here
- check there too. */
- regnode *trie_node= scan;
- regnode *tail= regnext(scan);
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- I32 max1 = 0, min1 = I32_MAX;
- struct regnode_charclass_class accum;
-
- if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */
- SCAN_COMMIT(pRExC_state, data,minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- if (!trie->jump) {
- min1= trie->minlen;
- max1= trie->maxlen;
- } else {
- const regnode *nextbranch= NULL;
- U32 word;
-
- for ( word=1 ; word <= trie->wordcount ; word++)
- {
- I32 deltanext=0, minnext=0, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- if (trie->jump[word]) {
- if (!nextbranch)
- nextbranch = trie_node + trie->jump[0];
- scan= trie_node + trie->jump[word];
- /* We go from the jump point to the branch that follows
- it. Note this means we need the vestigal unused branches
- even though they arent otherwise used.
- */
- minnext = study_chunk(pRExC_state, &scan, minlenp,
- &deltanext, (regnode *)nextbranch, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode*)nextbranch);
-
- if (min1 > (I32)(minnext + trie->minlen))
- min1 = minnext + trie->minlen;
- if (max1 < (I32)(minnext + deltanext + trie->maxlen))
- max1 = minnext + deltanext + trie->maxlen;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
-
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > min + min1)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- }
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- scan= tail;
- continue;
- }
-#else
- else if (PL_regkind[OP(scan)] == TRIE) {
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- U8*bang=NULL;
-
- min += trie->minlen;
- delta += (trie->maxlen - trie->minlen);
- flags &= ~SCF_DO_STCLASS; /* xxx */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += trie->minlen;
- data->pos_delta += (trie->maxlen - trie->minlen);
- if (trie->maxlen != trie->minlen)
- data->longest = &(data->longest_float);
- }
- if (trie->jump) /* no more substrings -- for now /grr*/
- flags &= ~SCF_DO_SUBSTR;
- }
-#endif /* old or new */
-#endif /* TRIE_STUDY_OPT */
-
- /* Else: zero-length, ignore. */
- scan = regnext(scan);
- }
- if (frame) {
- last = frame->last;
- scan = frame->next;
- stopparen = frame->stop;
- frame = frame->prev;
- goto fake_study_recurse;
- }
-
- finish:
- assert(!frame);
- DEBUG_STUDYDATA("pre-fin:",data,depth);
-
- *scanp = scan;
- *deltap = is_inf_internal ? I32_MAX : delta;
- if (flags & SCF_DO_SUBSTR && is_inf)
- data->pos_delta = I32_MAX - data->pos_min;
- if (is_par > (I32)U8_MAX)
- is_par = 0;
- if (is_par && pars==1 && data) {
- data->flags |= SF_IN_PAR;
- data->flags &= ~SF_HAS_PAR;
- }
- else if (pars && data) {
- data->flags |= SF_HAS_PAR;
- data->flags &= ~SF_IN_PAR;
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- if (flags & SCF_TRIE_RESTUDY)
- data->flags |= SCF_TRIE_RESTUDY;
-
- DEBUG_STUDYDATA("post-fin:",data,depth);
-
- return min < stopmin ? min : stopmin;
-}
-
-STATIC U32
-S_add_data(RExC_state_t *pRExC_state, U32 n, const char *s)
-{
- U32 count = RExC_rxi->data ? RExC_rxi->data->count : 0;
-
- PERL_ARGS_ASSERT_ADD_DATA;
-
- Renewc(RExC_rxi->data,
- sizeof(*RExC_rxi->data) + sizeof(void*) * (count + n - 1),
- char, struct reg_data);
- if(count)
- Renew(RExC_rxi->data->what, count + n, U8);
- else
- Newx(RExC_rxi->data->what, n, U8);
- RExC_rxi->data->count = count + n;
- Copy(s, RExC_rxi->data->what + count, n, U8);
- return count;
-}
-
-/*XXX: todo make this not included in a non debugging perl */
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_reginitcolors(pTHX)
-{
- dVAR;
- const char * const s = PerlEnv_getenv("PERL_RE_COLORS");
- if (s) {
- char *t = savepv(s);
- int i = 0;
- PL_colors[0] = t;
- while (++i < 6) {
- t = strchr(t, '\t');
- if (t) {
- *t = '\0';
- PL_colors[i] = ++t;
- }
- else
- PL_colors[i] = t = (char *)"";
- }
- } else {
- int i = 0;
- while (i < 6)
- PL_colors[i++] = (char *)"";
- }
- PL_colorset = 1;
-}
-#endif
-
-
-#ifdef TRIE_STUDY_OPT
-#define CHECK_RESTUDY_GOTO \
- if ( \
- (data.flags & SCF_TRIE_RESTUDY) \
- && ! restudied++ \
- ) goto reStudy
-#else
-#define CHECK_RESTUDY_GOTO
-#endif
-
-/*
- - pregcomp - compile a regular expression into internal code
- *
- * We can't allocate space until we know how big the compiled form will be,
- * but we can't compile it (and thus know how big it is) until we've got a
- * place to put the code. So we cheat: we compile it twice, once with code
- * generation turned off and size counting turned on, and once "for real".
- * This also means that we don't allocate space until we are sure that the
- * thing really will compile successfully, and we never have to move the
- * code and thus invalidate pointers into it. (Note that it has to be in
- * one piece because free() must be able to free it all.) [NB: not true in perl]
- *
- * Beware that the optimization-preparation code in here knows about some
- * of the structure of the compiled regexp. [I'll say.]
- */
-
-
-
-#ifndef PERL_IN_XSUB_RE
-#define RE_ENGINE_PTR &PL_core_reg_engine
-#else
-extern const struct regexp_engine my_reg_engine;
-#define RE_ENGINE_PTR &my_reg_engine
-#endif
-
-#ifndef PERL_IN_XSUB_RE
-REGEXP *
-Perl_pregcomp(pTHX_ SV * const pattern, const U32 flags)
-{
- dVAR;
- HV * const table = GvHV(PL_hintgv);
-
- PERL_ARGS_ASSERT_PREGCOMP;
-
- /* Dispatch a request to compile a regexp to correct
- regexp engine. */
- if (table) {
- SV **ptr= hv_fetchs(table, "regcomp", FALSE);
- GET_RE_DEBUG_FLAGS_DECL;
- if (ptr && SvIOK(*ptr) && SvIV(*ptr)) {
- const regexp_engine *eng=INT2PTR(regexp_engine*,SvIV(*ptr));
- DEBUG_COMPILE_r({
- PerlIO_printf(Perl_debug_log, "Using engine %"UVxf"\n",
- SvIV(*ptr));
- });
- return CALLREGCOMP_ENG(eng, pattern, flags);
- }
- }
- return Perl_re_compile(aTHX_ pattern, flags);
-}
-#endif
-
-REGEXP *
-Perl_re_compile(pTHX_ SV * const pattern, U32 pm_flags)
-{
- dVAR;
- REGEXP *rx;
- struct regexp *r;
- register regexp_internal *ri;
- STRLEN plen;
- char *exp = SvPV(pattern, plen);
- char* xend = exp + plen;
- regnode *scan;
- I32 flags;
- I32 minlen = 0;
- I32 sawplus = 0;
- I32 sawopen = 0;
- scan_data_t data;
- RExC_state_t RExC_state;
- RExC_state_t * const pRExC_state = &RExC_state;
-#ifdef TRIE_STUDY_OPT
- int restudied= 0;
- RExC_state_t copyRExC_state;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_COMPILE;
-
- DEBUG_r(if (!PL_colorset) reginitcolors());
-
- RExC_utf8 = RExC_orig_utf8 = SvUTF8(pattern);
-
- DEBUG_COMPILE_r({
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RExC_utf8,
- dsv, exp, plen, 60);
- PerlIO_printf(Perl_debug_log, "%sCompiling REx%s %s\n",
- PL_colors[4],PL_colors[5],s);
- });
-
-redo_first_pass:
- RExC_precomp = exp;
- RExC_flags = pm_flags;
- RExC_sawback = 0;
-
- RExC_seen = 0;
- RExC_seen_zerolen = *exp == '^' ? -1 : 0;
- RExC_seen_evals = 0;
- RExC_extralen = 0;
-
- /* First pass: determine size, legality. */
- RExC_parse = exp;
- RExC_start = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_nestroot = 0;
- RExC_size = 0L;
- RExC_emit = &PL_regdummy;
- RExC_whilem_seen = 0;
- RExC_charnames = NULL;
- RExC_open_parens = NULL;
- RExC_close_parens = NULL;
- RExC_opend = NULL;
- RExC_paren_names = NULL;
-#ifdef DEBUGGING
- RExC_paren_name_list = NULL;
-#endif
- RExC_recurse = NULL;
- RExC_recurse_count = 0;
-
-#if 0 /* REGC() is (currently) a NOP at the first pass.
- * Clever compilers notice this and complain. --jhi */
- REGC((U8)REG_MAGIC, (char*)RExC_emit);
-#endif
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n"));
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- RExC_precomp = NULL;
- return(NULL);
- }
- if (RExC_utf8 && !RExC_orig_utf8) {
- /* It's possible to write a regexp in ascii that represents Unicode
- codepoints outside of the byte range, such as via \x{100}. If we
- detect such a sequence we have to convert the entire pattern to utf8
- and then recompile, as our sizing calculation will have been based
- on 1 byte == 1 character, but we will need to use utf8 to encode
- at least some part of the pattern, and therefore must convert the whole
- thing.
- XXX: somehow figure out how to make this less expensive...
- -- dmq */
- STRLEN len = plen;
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log,
- "UTF8 mismatch! Converting to utf8 for resizing and compile\n"));
- exp = (char*)Perl_bytes_to_utf8(aTHX_ (U8*)exp, &len);
- xend = exp + len;
- RExC_orig_utf8 = RExC_utf8;
- SAVEFREEPV(exp);
- goto redo_first_pass;
- }
- DEBUG_PARSE_r({
- PerlIO_printf(Perl_debug_log,
- "Required size %"IVdf" nodes\n"
- "Starting second pass (creation)\n",
- (IV)RExC_size);
- RExC_lastnum=0;
- RExC_lastparse=NULL;
- });
- /* Small enough for pointer-storage convention?
- If extralen==0, this means that we will not need long jumps. */
- if (RExC_size >= 0x10000L && RExC_extralen)
- RExC_size += RExC_extralen;
- else
- RExC_extralen = 0;
- if (RExC_whilem_seen > 15)
- RExC_whilem_seen = 15;
-
- /* Allocate space and zero-initialize. Note, the two step process
- of zeroing when in debug mode, thus anything assigned has to
- happen after that */
- rx = (REGEXP*) newSV_type(SVt_REGEXP);
- r = (struct regexp*)SvANY(rx);
- Newxc(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode),
- char, regexp_internal);
- if ( r == NULL || ri == NULL )
- FAIL("Regexp out of space");
-#ifdef DEBUGGING
- /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */
- Zero(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode), char);
-#else
- /* bulk initialize base fields with 0. */
- Zero(ri, sizeof(regexp_internal), char);
-#endif
-
- /* non-zero initialization begins here */
- RXi_SET( r, ri );
- r->engine= RE_ENGINE_PTR;
- r->extflags = pm_flags;
- {
- bool has_p = ((r->extflags & RXf_PMf_KEEPCOPY) == RXf_PMf_KEEPCOPY);
- bool has_minus = ((r->extflags & RXf_PMf_STD_PMMOD) != RXf_PMf_STD_PMMOD);
- bool has_runon = ((RExC_seen & REG_SEEN_RUN_ON_COMMENT)==REG_SEEN_RUN_ON_COMMENT);
- U16 reganch = (U16)((r->extflags & RXf_PMf_STD_PMMOD)
- >> RXf_PMf_STD_PMMOD_SHIFT);
- const char *fptr = STD_PAT_MODS; /*"msix"*/
- char *p;
- const STRLEN wraplen = plen + has_minus + has_p + has_runon
- + (sizeof(STD_PAT_MODS) - 1)
- + (sizeof("(?:)") - 1);
-
- p = sv_grow(MUTABLE_SV(rx), wraplen + 1);
- SvCUR_set(rx, wraplen);
- SvPOK_on(rx);
- SvFLAGS(rx) |= SvUTF8(pattern);
- *p++='('; *p++='?';
- if (has_p)
- *p++ = KEEPCOPY_PAT_MOD; /*'p'*/
- {
- char *r = p + (sizeof(STD_PAT_MODS) - 1) + has_minus - 1;
- char *colon = r + 1;
- char ch;
-
- while((ch = *fptr++)) {
- if(reganch & 1)
- *p++ = ch;
- else
- *r-- = ch;
- reganch >>= 1;
- }
- if(has_minus) {
- *r = '-';
- p = colon;
- }
- }
-
- *p++ = ':';
- Copy(RExC_precomp, p, plen, char);
- assert ((RX_WRAPPED(rx) - p) < 16);
- r->pre_prefix = p - RX_WRAPPED(rx);
- p += plen;
- if (has_runon)
- *p++ = '\n';
- *p++ = ')';
- *p = 0;
- }
-
- r->intflags = 0;
- r->nparens = RExC_npar - 1; /* set early to validate backrefs */
-
- if (RExC_seen & REG_SEEN_RECURSE) {
- Newxz(RExC_open_parens, RExC_npar,regnode *);
- SAVEFREEPV(RExC_open_parens);
- Newxz(RExC_close_parens,RExC_npar,regnode *);
- SAVEFREEPV(RExC_close_parens);
- }
-
- /* Useful during FAIL. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- Newxz(ri->u.offsets, 2*RExC_size+1, U32); /* MJD 20001228 */
- DEBUG_OFFSETS_r(PerlIO_printf(Perl_debug_log,
- "%s %"UVuf" bytes for offset annotations.\n",
- ri->u.offsets ? "Got" : "Couldn't get",
- (UV)((2*RExC_size+1) * sizeof(U32))));
-#endif
- SetProgLen(ri,RExC_size);
- RExC_rx_sv = rx;
- RExC_rx = r;
- RExC_rxi = ri;
-
- /* Second pass: emit code. */
- RExC_flags = pm_flags; /* don't let top level (?i) bleed */
- RExC_parse = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_emit_start = ri->program;
- RExC_emit = ri->program;
- RExC_emit_bound = ri->program + RExC_size + 1;
-
- /* Store the count of eval-groups for security checks: */
- RExC_rx->seen_evals = RExC_seen_evals;
- REGC((U8)REG_MAGIC, (char*) RExC_emit++);
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- ReREFCNT_dec(rx);
- return(NULL);
- }
- /* XXXX To minimize changes to RE engine we always allocate
- 3-units-long substrs field. */
- Newx(r->substrs, 1, struct reg_substr_data);
- if (RExC_recurse_count) {
- Newxz(RExC_recurse,RExC_recurse_count,regnode *);
- SAVEFREEPV(RExC_recurse);
- }
-
-reStudy:
- r->minlen = minlen = sawplus = sawopen = 0;
- Zero(r->substrs, 1, struct reg_substr_data);
-
-#ifdef TRIE_STUDY_OPT
- if (!restudied) {
- StructCopy(&zero_scan_data, &data, scan_data_t);
- copyRExC_state = RExC_state;
- } else {
- U32 seen=RExC_seen;
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log,"Restudying\n"));
-
- RExC_state = copyRExC_state;
- if (seen & REG_TOP_LEVEL_BRANCHES)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
- else
- RExC_seen &= ~REG_TOP_LEVEL_BRANCHES;
- if (data.last_found) {
- SvREFCNT_dec(data.longest_fixed);
- SvREFCNT_dec(data.longest_float);
- SvREFCNT_dec(data.last_found);
- }
- StructCopy(&zero_scan_data, &data, scan_data_t);
- }
-#else
- StructCopy(&zero_scan_data, &data, scan_data_t);
-#endif
-
- /* Dig out information for optimizations. */
- r->extflags = RExC_flags; /* was pm_op */
- /*dmq: removed as part of de-PMOP: pm->op_pmflags = RExC_flags; */
-
- if (UTF)
- SvUTF8_on(rx); /* Unicode in it? */
- ri->regstclass = NULL;
- if (RExC_naughty >= 10) /* Probably an expensive pattern. */
- r->intflags |= PREGf_NAUGHTY;
- scan = ri->program + 1; /* First BRANCH. */
-
- /* testing for BRANCH here tells us whether there is "must appear"
- data in the pattern. If there is then we can use it for optimisations */
- if (!(RExC_seen & REG_TOP_LEVEL_BRANCHES)) { /* Only one top-level choice. */
- I32 fake;
- STRLEN longest_float_length, longest_fixed_length;
- struct regnode_charclass_class ch_class; /* pointed to by data */
- int stclass_flag;
- I32 last_close = 0; /* pointed to by data */
- regnode *first= scan;
- regnode *first_next= regnext(first);
-
- /*
- * Skip introductions and multiplicators >= 1
- * so that we can extract the 'meat' of the pattern that must
- * match in the large if() sequence following.
- * NOTE that EXACT is NOT covered here, as it is normally
- * picked up by the optimiser separately.
- *
- * This is unfortunate as the optimiser isnt handling lookahead
- * properly currently.
- *
- */
- while ((OP(first) == OPEN && (sawopen = 1)) ||
- /* An OR of *one* alternative - should not happen now. */
- (OP(first) == BRANCH && OP(first_next) != BRANCH) ||
- /* for now we can't handle lookbehind IFMATCH*/
- (OP(first) == IFMATCH && !first->flags) ||
- (OP(first) == PLUS) ||
- (OP(first) == MINMOD) ||
- /* An {n,m} with n>0 */
- (PL_regkind[OP(first)] == CURLY && ARG1(first) > 0) ||
- (OP(first) == NOTHING && PL_regkind[OP(first_next)] != END ))
- {
- /*
- * the only op that could be a regnode is PLUS, all the rest
- * will be regnode_1 or regnode_2.
- *
- */
- if (OP(first) == PLUS)
- sawplus = 1;
- else
- first += regarglen[OP(first)];
-
- first = NEXTOPER(first);
- first_next= regnext(first);
- }
-
- /* Starting-point info. */
- again:
- DEBUG_PEEP("first:",first,0);
- /* Ignore EXACT as we deal with it later. */
- if (PL_regkind[OP(first)] == EXACT) {
- if (OP(first) == EXACT)
- NOOP; /* Empty, get anchored substr later. */
- else if ((OP(first) == EXACTF || OP(first) == EXACTFL))
- ri->regstclass = first;
- }
-#ifdef TRIE_STCLASS
- else if (PL_regkind[OP(first)] == TRIE &&
- ((reg_trie_data *)ri->data->data[ ARG(first) ])->minlen>0)
- {
- regnode *trie_op;
- /* this can happen only on restudy */
- if ( OP(first) == TRIE ) {
- struct regnode_1 *trieop = (struct regnode_1 *)
- PerlMemShared_calloc(1, sizeof(struct regnode_1));
- StructCopy(first,trieop,struct regnode_1);
- trie_op=(regnode *)trieop;
- } else {
- struct regnode_charclass *trieop = (struct regnode_charclass *)
- PerlMemShared_calloc(1, sizeof(struct regnode_charclass));
- StructCopy(first,trieop,struct regnode_charclass);
- trie_op=(regnode *)trieop;
- }
- OP(trie_op)+=2;
- make_trie_failtable(pRExC_state, (regnode *)first, trie_op, 0);
- ri->regstclass = trie_op;
- }
-#endif
- else if (strchr((const char*)PL_simple,OP(first)))
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOUND ||
- PL_regkind[OP(first)] == NBOUND)
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOL) {
- r->extflags |= (OP(first) == MBOL
- ? RXf_ANCH_MBOL
- : (OP(first) == SBOL
- ? RXf_ANCH_SBOL
- : RXf_ANCH_BOL));
- first = NEXTOPER(first);
- goto again;
- }
- else if (OP(first) == GPOS) {
- r->extflags |= RXf_ANCH_GPOS;
- first = NEXTOPER(first);
- goto again;
- }
- else if ((!sawopen || !RExC_sawback) &&
- (OP(first) == STAR &&
- PL_regkind[OP(NEXTOPER(first))] == REG_ANY) &&
- !(r->extflags & RXf_ANCH) && !(RExC_seen & REG_SEEN_EVAL))
- {
- /* turn .* into ^.* with an implied $*=1 */
- const int type =
- (OP(NEXTOPER(first)) == REG_ANY)
- ? RXf_ANCH_MBOL
- : RXf_ANCH_SBOL;
- r->extflags |= type;
- r->intflags |= PREGf_IMPLICIT;
- first = NEXTOPER(first);
- goto again;
- }
- if (sawplus && (!sawopen || !RExC_sawback)
- && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */
- /* x+ must match at the 1st pos of run of x's */
- r->intflags |= PREGf_SKIP;
-
- /* Scan is after the zeroth branch, first is atomic matcher. */
-#ifdef TRIE_STUDY_OPT
- DEBUG_PARSE_r(
- if (!restudied)
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#else
- DEBUG_PARSE_r(
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#endif
-
-
- /*
- * If there's something expensive in the r.e., find the
- * longest literal string that must appear and make it the
- * regmust. Resolve ties in favor of later strings, since
- * the regstart check works with the beginning of the r.e.
- * and avoiding duplication strengthens checking. Not a
- * strong reason, but sufficient in the absence of others.
- * [Now we resolve ties in favor of the earlier string if
- * it happens that c_offset_min has been invalidated, since the
- * earlier string may buy us something the later one won't.]
- */
-
- data.longest_fixed = newSVpvs("");
- data.longest_float = newSVpvs("");
- data.last_found = newSVpvs("");
- data.longest = &(data.longest_fixed);
- first = scan;
- if (!ri->regstclass) {
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- stclass_flag = SCF_DO_STCLASS_AND;
- } else /* XXXX Check for BOUND? */
- stclass_flag = 0;
- data.last_closep = &last_close;
-
- minlen = study_chunk(pRExC_state, &first, &minlen, &fake, scan + RExC_size, /* Up to end */
- &data, -1, NULL, NULL,
- SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag,0);
-
-
- CHECK_RESTUDY_GOTO;
-
-
- if ( RExC_npar == 1 && data.longest == &(data.longest_fixed)
- && data.last_start_min == 0 && data.last_end > 0
- && !RExC_seen_zerolen
- && !(RExC_seen & REG_SEEN_VERBARG)
- && (!(RExC_seen & REG_SEEN_GPOS) || (r->extflags & RXf_ANCH_GPOS)))
- r->extflags |= RXf_CHECK_ALL;
- scan_commit(pRExC_state, &data,&minlen,0);
- SvREFCNT_dec(data.last_found);
-
- /* Note that code very similar to this but for anchored string
- follows immediately below, changes may need to be made to both.
- Be careful.
- */
- longest_float_length = CHR_SVLEN(data.longest_float);
- if (longest_float_length
- || (data.flags & SF_FL_BEFORE_EOL
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */
- && data.offset_fixed == data.offset_float_min
- && SvCUR(data.longest_fixed) == SvCUR(data.longest_float))
- goto remove_float; /* As in (a)+. */
-
- /* copy the information about the longest float from the reg_scan_data
- over to the program. */
- if (SvUTF8(data.longest_float)) {
- r->float_utf8 = data.longest_float;
- r->float_substr = NULL;
- } else {
- r->float_substr = data.longest_float;
- r->float_utf8 = NULL;
- }
- /* float_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_float ? *(data.minlen_float)
- : (I32)longest_float_length;
- r->float_end_shift = ml - data.offset_float_min
- - longest_float_length + (SvTAIL(data.longest_float) != 0)
- + data.lookbehind_float;
- r->float_min_offset = data.offset_float_min - data.lookbehind_float;
- r->float_max_offset = data.offset_float_max;
- if (data.offset_float_max < I32_MAX) /* Don't offset infinity */
- r->float_max_offset -= data.lookbehind_float;
-
- t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_float, t ? FBMcf_TAIL : 0);
- }
- else {
- remove_float:
- r->float_substr = r->float_utf8 = NULL;
- SvREFCNT_dec(data.longest_float);
- longest_float_length = 0;
- }
-
- /* Note that code very similar to this but for floating string
- is immediately above, changes may need to be made to both.
- Be careful.
- */
- longest_fixed_length = CHR_SVLEN(data.longest_fixed);
- if (longest_fixed_length
- || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- /* copy the information about the longest fixed
- from the reg_scan_data over to the program. */
- if (SvUTF8(data.longest_fixed)) {
- r->anchored_utf8 = data.longest_fixed;
- r->anchored_substr = NULL;
- } else {
- r->anchored_substr = data.longest_fixed;
- r->anchored_utf8 = NULL;
- }
- /* fixed_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_fixed ? *(data.minlen_fixed)
- : (I32)longest_fixed_length;
- r->anchored_end_shift = ml - data.offset_fixed
- - longest_fixed_length + (SvTAIL(data.longest_fixed) != 0)
- + data.lookbehind_fixed;
- r->anchored_offset = data.offset_fixed - data.lookbehind_fixed;
-
- t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_fixed, t ? FBMcf_TAIL : 0);
- }
- else {
- r->anchored_substr = r->anchored_utf8 = NULL;
- SvREFCNT_dec(data.longest_fixed);
- longest_fixed_length = 0;
- }
- if (ri->regstclass
- && (OP(ri->regstclass) == REG_ANY || OP(ri->regstclass) == SANY))
- ri->regstclass = NULL;
- if ((!(r->anchored_substr || r->anchored_utf8) || r->anchored_offset)
- && stclass_flag
- && !(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV *sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
-
- /* A temporary algorithm prefers floated substr to fixed one to dig more info. */
- if (longest_fixed_length > longest_float_length) {
- r->check_end_shift = r->anchored_end_shift;
- r->check_substr = r->anchored_substr;
- r->check_utf8 = r->anchored_utf8;
- r->check_offset_min = r->check_offset_max = r->anchored_offset;
- if (r->extflags & RXf_ANCH_SINGLE)
- r->extflags |= RXf_NOSCAN;
- }
- else {
- r->check_end_shift = r->float_end_shift;
- r->check_substr = r->float_substr;
- r->check_utf8 = r->float_utf8;
- r->check_offset_min = r->float_min_offset;
- r->check_offset_max = r->float_max_offset;
- }
- /* XXXX Currently intuiting is not compatible with ANCH_GPOS.
- This should be changed ASAP! */
- if ((r->check_substr || r->check_utf8) && !(r->extflags & RXf_ANCH_GPOS)) {
- r->extflags |= RXf_USE_INTUIT;
- if (SvTAIL(r->check_substr ? r->check_substr : r->check_utf8))
- r->extflags |= RXf_INTUIT_TAIL;
- }
- /* XXX Unneeded? dmq (shouldn't as this is handled elsewhere)
- if ( (STRLEN)minlen < longest_float_length )
- minlen= longest_float_length;
- if ( (STRLEN)minlen < longest_fixed_length )
- minlen= longest_fixed_length;
- */
- }
- else {
- /* Several toplevels. Best we can is to set minlen. */
- I32 fake;
- struct regnode_charclass_class ch_class;
- I32 last_close = 0;
-
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "\nMulti Top Level\n"));
-
- scan = ri->program + 1;
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- data.last_closep = &last_close;
-
-
- minlen = study_chunk(pRExC_state, &scan, &minlen, &fake, scan + RExC_size,
- &data, -1, NULL, NULL, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS,0);
-
- CHECK_RESTUDY_GOTO;
-
- r->check_substr = r->check_utf8 = r->anchored_substr = r->anchored_utf8
- = r->float_substr = r->float_utf8 = NULL;
- if (!(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV* sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
- }
-
- /* Guard against an embedded (?=) or (?<=) with a longer minlen than
- the "real" pattern. */
- DEBUG_OPTIMISE_r({
- PerlIO_printf(Perl_debug_log,"minlen: %"IVdf" r->minlen:%"IVdf"\n",
- (IV)minlen, (IV)r->minlen);
- });
- r->minlenret = minlen;
- if (r->minlen < minlen)
- r->minlen = minlen;
-
- if (RExC_seen & REG_SEEN_GPOS)
- r->extflags |= RXf_GPOS_SEEN;
- if (RExC_seen & REG_SEEN_LOOKBEHIND)
- r->extflags |= RXf_LOOKBEHIND_SEEN;
- if (RExC_seen & REG_SEEN_EVAL)
- r->extflags |= RXf_EVAL_SEEN;
- if (RExC_seen & REG_SEEN_CANY)
- r->extflags |= RXf_CANY_SEEN;
- if (RExC_seen & REG_SEEN_VERBARG)
- r->intflags |= PREGf_VERBARG_SEEN;
- if (RExC_seen & REG_SEEN_CUTGROUP)
- r->intflags |= PREGf_CUTGROUP_SEEN;
- if (RExC_paren_names)
- RXp_PAREN_NAMES(r) = MUTABLE_HV(SvREFCNT_inc(RExC_paren_names));
- else
- RXp_PAREN_NAMES(r) = NULL;
-
-#ifdef STUPID_PATTERN_CHECKS
- if (RX_PRELEN(rx) == 0)
- r->extflags |= RXf_NULL;
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else if (RX_PRELEN(rx) == 3 && memEQ("\\s+", RX_PRECOMP(rx), 3))
- r->extflags |= RXf_WHITE;
- else if (RX_PRELEN(rx) == 1 && RXp_PRECOMP(rx)[0] == '^')
- r->extflags |= RXf_START_ONLY;
-#else
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else {
- regnode *first = ri->program + 1;
- U8 fop = OP(first);
- U8 nop = OP(NEXTOPER(first));
-
- if (PL_regkind[fop] == NOTHING && nop == END)
- r->extflags |= RXf_NULL;
- else if (PL_regkind[fop] == BOL && nop == END)
- r->extflags |= RXf_START_ONLY;
- else if (fop == PLUS && nop ==SPACE && OP(regnext(first))==END)
- r->extflags |= RXf_WHITE;
- }
-#endif
-#ifdef DEBUGGING
- if (RExC_paren_names) {
- ri->name_list_idx = add_data( pRExC_state, 1, "p" );
- ri->data->data[ri->name_list_idx] = (void*)SvREFCNT_inc(RExC_paren_name_list);
- } else
-#endif
- ri->name_list_idx = 0;
-
- if (RExC_recurse_count) {
- for ( ; RExC_recurse_count ; RExC_recurse_count-- ) {
- const regnode *scan = RExC_recurse[RExC_recurse_count-1];
- ARG2L_SET( scan, RExC_open_parens[ARG(scan)-1] - scan );
- }
- }
- Newxz(r->offs, RExC_npar, regexp_paren_pair);
- /* assume we don't need to swap parens around before we match */
-
- DEBUG_DUMP_r({
- PerlIO_printf(Perl_debug_log,"Final program:\n");
- regdump(r);
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_OFFSETS_r(if (ri->u.offsets) {
- const U32 len = ri->u.offsets[0];
- U32 i;
- GET_RE_DEBUG_FLAGS_DECL;
- PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)ri->u.offsets[0]);
- for (i = 1; i <= len; i++) {
- if (ri->u.offsets[i*2-1] || ri->u.offsets[i*2])
- PerlIO_printf(Perl_debug_log, "%"UVuf":%"UVuf"[%"UVuf"] ",
- (UV)i, (UV)ri->u.offsets[i*2-1], (UV)ri->u.offsets[i*2]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
-#endif
- return rx;
-}
-
-#undef RE_ENGINE_PTR
-
-
-SV*
-Perl_reg_named_buff(pTHX_ REGEXP * const rx, SV * const key, SV * const value,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF;
-
- PERL_UNUSED_ARG(value);
-
- if (flags & RXapif_FETCH) {
- return reg_named_buff_fetch(rx, key, flags);
- } else if (flags & (RXapif_STORE | RXapif_DELETE | RXapif_CLEAR)) {
- Perl_croak(aTHX_ "%s", PL_no_modify);
- return NULL;
- } else if (flags & RXapif_EXISTS) {
- return reg_named_buff_exists(rx, key, flags)
- ? &PL_sv_yes
- : &PL_sv_no;
- } else if (flags & RXapif_REGNAMES) {
- return reg_named_buff_all(rx, flags);
- } else if (flags & (RXapif_SCALAR | RXapif_REGNAMES_COUNT)) {
- return reg_named_buff_scalar(rx, flags);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_iter(pTHX_ REGEXP * const rx, const SV * const lastkey,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ITER;
- PERL_UNUSED_ARG(lastkey);
-
- if (flags & RXapif_FIRSTKEY)
- return reg_named_buff_firstkey(rx, flags);
- else if (flags & RXapif_NEXTKEY)
- return reg_named_buff_nextkey(rx, flags);
- else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_iter", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_fetch(pTHX_ REGEXP * const r, SV * const namesv,
- const U32 flags)
-{
- AV *retarray = NULL;
- SV *ret;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FETCH;
-
- if (flags & RXapif_ALL)
- retarray=newAV();
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HE *he_str = hv_fetch_ent( RXp_PAREN_NAMES(rx), namesv, 0, 0 );
- if (he_str) {
- IV i;
- SV* sv_dat=HeVAL(he_str);
- I32 *nums=(I32*)SvPVX(sv_dat);
- for ( i=0; i<SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->nparens) >= nums[i]
- && rx->offs[nums[i]].start != -1
- && rx->offs[nums[i]].end != -1)
- {
- ret = newSVpvs("");
- CALLREG_NUMBUF_FETCH(r,nums[i],ret);
- if (!retarray)
- return ret;
- } else {
- ret = newSVsv(&PL_sv_undef);
- }
- if (retarray)
- av_push(retarray, ret);
- }
- if (retarray)
- return newRV_noinc(MUTABLE_SV(retarray));
- }
- }
- return NULL;
-}
-
-bool
-Perl_reg_named_buff_exists(pTHX_ REGEXP * const r, SV * const key,
- const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_EXISTS;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & RXapif_ALL) {
- return hv_exists_ent(RXp_PAREN_NAMES(rx), key, 0);
- } else {
- SV *sv = CALLREG_NAMED_BUFF_FETCH(r, key, flags);
- if (sv) {
- SvREFCNT_dec(sv);
- return TRUE;
- } else {
- return FALSE;
- }
- }
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_firstkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FIRSTKEY;
-
- if ( rx && RXp_PAREN_NAMES(rx) ) {
- (void)hv_iterinit(RXp_PAREN_NAMES(rx));
-
- return CALLREG_NAMED_BUFF_NEXTKEY(r, NULL, flags & ~RXapif_FIRSTKEY);
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_nextkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_NEXTKEY;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv = RXp_PAREN_NAMES(rx);
- HE *temphe;
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- return newSVhek(HeKEY_hek(temphe));
- }
- }
- }
- return NULL;
-}
-
-SV*
-Perl_reg_named_buff_scalar(pTHX_ REGEXP * const r, const U32 flags)
-{
- SV *ret;
- AV *av;
- I32 length;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_SCALAR;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & (RXapif_ALL | RXapif_REGNAMES_COUNT)) {
- return newSViv(HvTOTALKEYS(RXp_PAREN_NAMES(rx)));
- } else if (flags & RXapif_ONE) {
- ret = CALLREG_NAMED_BUFF_ALL(r, (flags | RXapif_REGNAMES));
- av = MUTABLE_AV(SvRV(ret));
- length = av_len(av);
- SvREFCNT_dec(ret);
- return newSViv(length + 1);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_scalar", (int)flags);
- return NULL;
- }
- }
- return &PL_sv_undef;
-}
-
-SV*
-Perl_reg_named_buff_all(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- AV *av = newAV();
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ALL;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv= RXp_PAREN_NAMES(rx);
- HE *temphe;
- (void)hv_iterinit(hv);
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- av_push(av, newSVhek(HeKEY_hek(temphe)));
- }
- }
- }
-
- return newRV_noinc(MUTABLE_SV(av));
-}
-
-void
-Perl_reg_numbered_buff_fetch(pTHX_ REGEXP * const r, const I32 paren,
- SV * const sv)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- char *s = NULL;
- I32 i = 0;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_FETCH;
-
- if (!rx->subbeg) {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- else
- if (paren == RX_BUFF_IDX_PREMATCH && rx->offs[0].start != -1) {
- /* $` */
- i = rx->offs[0].start;
- s = rx->subbeg;
- }
- else
- if (paren == RX_BUFF_IDX_POSTMATCH && rx->offs[0].end != -1) {
- /* $' */
- s = rx->subbeg + rx->offs[0].end;
- i = rx->sublen - rx->offs[0].end;
- }
- else
- if ( 0 <= paren && paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- /* $& $1 ... */
- i = t1 - s1;
- s = rx->subbeg + s1;
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- assert(rx->sublen >= (s - rx->subbeg) + i );
- if (i >= 0) {
- const int oldtainted = PL_tainted;
- TAINT_NOT;
- sv_setpvn(sv, s, i);
- PL_tainted = oldtainted;
- if ( (rx->extflags & RXf_CANY_SEEN)
- ? (RXp_MATCH_UTF8(rx)
- && (!i || is_utf8_string((U8*)s, i)))
- : (RXp_MATCH_UTF8(rx)) )
- {
- SvUTF8_on(sv);
- }
- else
- SvUTF8_off(sv);
- if (PL_tainting) {
- if (RXp_MATCH_TAINTED(rx)) {
- if (SvTYPE(sv) >= SVt_PVMG) {
- MAGIC* const mg = SvMAGIC(sv);
- MAGIC* mgt;
- PL_tainted = 1;
- SvMAGIC_set(sv, mg->mg_moremagic);
- SvTAINT(sv);
- if ((mgt = SvMAGIC(sv))) {
- mg->mg_moremagic = mgt;
- SvMAGIC_set(sv, mg);
- }
- } else {
- PL_tainted = 1;
- SvTAINT(sv);
- }
- } else
- SvTAINTED_off(sv);
- }
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
-}
-
-void
-Perl_reg_numbered_buff_store(pTHX_ REGEXP * const rx, const I32 paren,
- SV const * const value)
-{
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_STORE;
-
- PERL_UNUSED_ARG(rx);
- PERL_UNUSED_ARG(paren);
- PERL_UNUSED_ARG(value);
-
- if (!PL_localizing)
- Perl_croak(aTHX_ "%s", PL_no_modify);
-}
-
-I32
-Perl_reg_numbered_buff_length(pTHX_ REGEXP * const r, const SV * const sv,
- const I32 paren)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- I32 i;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_LENGTH;
-
- /* Some of this code was originally in C<Perl_magic_len> in F<mg.c> */
- switch (paren) {
- /* $` / ${^PREMATCH} */
- case RX_BUFF_IDX_PREMATCH:
- if (rx->offs[0].start != -1) {
- i = rx->offs[0].start;
- if (i > 0) {
- s1 = 0;
- t1 = i;
- goto getlen;
- }
- }
- return 0;
- /* $' / ${^POSTMATCH} */
- case RX_BUFF_IDX_POSTMATCH:
- if (rx->offs[0].end != -1) {
- i = rx->sublen - rx->offs[0].end;
- if (i > 0) {
- s1 = rx->offs[0].end;
- t1 = rx->sublen;
- goto getlen;
- }
- }
- return 0;
- /* $& / ${^MATCH}, $1, $2, ... */
- default:
- if (paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- i = t1 - s1;
- goto getlen;
- } else {
- if (ckWARN(WARN_UNINITIALIZED))
- report_uninit((const SV *)sv);
- return 0;
- }
- }
- getlen:
- if (i > 0 && RXp_MATCH_UTF8(rx)) {
- const char * const s = rx->subbeg + s1;
- const U8 *ep;
- STRLEN el;
-
- i = t1 - s1;
- if (is_utf8_string_loclen((U8*)s, i, &ep, &el))
- i = el;
- }
- return i;
-}
-
-SV*
-Perl_reg_qr_package(pTHX_ REGEXP * const rx)
-{
- PERL_ARGS_ASSERT_REG_QR_PACKAGE;
- PERL_UNUSED_ARG(rx);
- if (0)
- return NULL;
- else
- return newSVpvs("Regexp");
-}
-
-/* Scans the name of a named buffer from the pattern.
- * If flags is REG_RSN_RETURN_NULL returns null.
- * If flags is REG_RSN_RETURN_NAME returns an SV* containing the name
- * If flags is REG_RSN_RETURN_DATA returns the data SV* corresponding
- * to the parsed name as looked up in the RExC_paren_names hash.
- * If there is an error throws a vFAIL().. type exception.
- */
-
-#define REG_RSN_RETURN_NULL 0
-#define REG_RSN_RETURN_NAME 1
-#define REG_RSN_RETURN_DATA 2
-
-STATIC SV*
-S_reg_scan_name(pTHX_ RExC_state_t *pRExC_state, U32 flags)
-{
- char *name_start = RExC_parse;
-
- PERL_ARGS_ASSERT_REG_SCAN_NAME;
-
- if (isIDFIRST_lazy_if(RExC_parse, UTF)) {
- /* skip IDFIRST by using do...while */
- if (UTF)
- do {
- RExC_parse += UTF8SKIP(RExC_parse);
- } while (isALNUM_utf8((U8*)RExC_parse));
- else
- do {
- RExC_parse++;
- } while (isALNUM(*RExC_parse));
- }
-
- if ( flags ) {
- SV* sv_name
- = newSVpvn_flags(name_start, (int)(RExC_parse - name_start),
- SVs_TEMP | (UTF ? SVf_UTF8 : 0));
- if ( flags == REG_RSN_RETURN_NAME)
- return sv_name;
- else if (flags==REG_RSN_RETURN_DATA) {
- HE *he_str = NULL;
- SV *sv_dat = NULL;
- if ( ! sv_name ) /* should not happen*/
- Perl_croak(aTHX_ "panic: no svname in reg_scan_name");
- if (RExC_paren_names)
- he_str = hv_fetch_ent( RExC_paren_names, sv_name, 0, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat )
- vFAIL("Reference to nonexistent named group");
- return sv_dat;
- }
- else {
- Perl_croak(aTHX_ "panic: bad flag in reg_scan_name");
- }
- /* NOT REACHED */
- }
- return NULL;
-}
-
-#define DEBUG_PARSE_MSG(funcname) DEBUG_PARSE_r({ \
- int rem=(int)(RExC_end - RExC_parse); \
- int cut; \
- int num; \
- int iscut=0; \
- if (rem>10) { \
- rem=10; \
- iscut=1; \
- } \
- cut=10-rem; \
- if (RExC_lastparse!=RExC_parse) \
- PerlIO_printf(Perl_debug_log," >%.*s%-*s", \
- rem, RExC_parse, \
- cut + 4, \
- iscut ? "..." : "<" \
- ); \
- else \
- PerlIO_printf(Perl_debug_log,"%16s",""); \
- \
- if (SIZE_ONLY) \
- num = RExC_size + 1; \
- else \
- num=REG_NODE_NUM(RExC_emit); \
- if (RExC_lastnum!=num) \
- PerlIO_printf(Perl_debug_log,"|%4d",num); \
- else \
- PerlIO_printf(Perl_debug_log,"|%4s",""); \
- PerlIO_printf(Perl_debug_log,"|%*s%-4s", \
- (int)((depth*2)), "", \
- (funcname) \
- ); \
- RExC_lastnum=num; \
- RExC_lastparse=RExC_parse; \
-})
-
-
-
-#define DEBUG_PARSE(funcname) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,"%4s","\n"); \
-})
-#define DEBUG_PARSE_FMT(funcname,fmt,args) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,fmt "\n",args); \
-})
-/*
- - reg - regular expression, i.e. main body or parenthesized thing
- *
- * Caller must absorb opening parenthesis.
- *
- * Combining parenthesis handling with the base level of regular expression
- * is a trifle forced, but the need to tie the tails of the branches to what
- * follows makes it hard to avoid.
- */
-#define REGTAIL(x,y,z) regtail((x),(y),(z),depth+1)
-#ifdef DEBUGGING
-#define REGTAIL_STUDY(x,y,z) regtail_study((x),(y),(z),depth+1)
-#else
-#define REGTAIL_STUDY(x,y,z) regtail((x),(y),(z),depth+1)
-#endif
-
-STATIC regnode *
-S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth)
- /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */
-{
- dVAR;
- register regnode *ret; /* Will be the head of the group. */
- register regnode *br;
- register regnode *lastbr;
- register regnode *ender = NULL;
- register I32 parno = 0;
- I32 flags;
- U32 oregflags = RExC_flags;
- bool have_branch = 0;
- bool is_open = 0;
- I32 freeze_paren = 0;
- I32 after_freeze = 0;
-
- /* for (?g), (?gc), and (?o) warnings; warning
- about (?c) will warn about (?g) -- japhy */
-
-#define WASTED_O 0x01
-#define WASTED_G 0x02
-#define WASTED_C 0x04
-#define WASTED_GC (0x02|0x04)
- I32 wastedflags = 0x00;
-
- char * parse_start = RExC_parse; /* MJD */
- char * const oregcomp_parse = RExC_parse;
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG;
- DEBUG_PARSE("reg ");
-
- *flagp = 0; /* Tentatively. */
-
-
- /* Make an OPEN node, if parenthesized. */
- if (paren) {
- if ( *RExC_parse == '*') { /* (*VERB:ARG) */
- char *start_verb = RExC_parse;
- STRLEN verb_len = 0;
- char *start_arg = NULL;
- unsigned char op = 0;
- int argok = 1;
- int internal_argval = 0; /* internal_argval is only useful if !argok */
- while ( *RExC_parse && *RExC_parse != ')' ) {
- if ( *RExC_parse == ':' ) {
- start_arg = RExC_parse + 1;
- break;
- }
- RExC_parse++;
- }
- ++start_verb;
- verb_len = RExC_parse - start_verb;
- if ( start_arg ) {
- RExC_parse++;
- while ( *RExC_parse && *RExC_parse != ')' )
- RExC_parse++;
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern argument");
- if ( RExC_parse == start_arg )
- start_arg = NULL;
- } else {
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern");
- }
-
- switch ( *start_verb ) {
- case 'A': /* (*ACCEPT) */
- if ( memEQs(start_verb,verb_len,"ACCEPT") ) {
- op = ACCEPT;
- internal_argval = RExC_nestroot;
- }
- break;
- case 'C': /* (*COMMIT) */
- if ( memEQs(start_verb,verb_len,"COMMIT") )
- op = COMMIT;
- break;
- case 'F': /* (*FAIL) */
- if ( verb_len==1 || memEQs(start_verb,verb_len,"FAIL") ) {
- op = OPFAIL;
- argok = 0;
- }
- break;
- case ':': /* (*:NAME) */
- case 'M': /* (*MARK:NAME) */
- if ( verb_len==0 || memEQs(start_verb,verb_len,"MARK") ) {
- op = MARKPOINT;
- argok = -1;
- }
- break;
- case 'P': /* (*PRUNE) */
- if ( memEQs(start_verb,verb_len,"PRUNE") )
- op = PRUNE;
- break;
- case 'S': /* (*SKIP) */
- if ( memEQs(start_verb,verb_len,"SKIP") )
- op = SKIP;
- break;
- case 'T': /* (*THEN) */
- /* [19:06] <TimToady> :: is then */
- if ( memEQs(start_verb,verb_len,"THEN") ) {
- op = CUTGROUP;
- RExC_seen |= REG_SEEN_CUTGROUP;
- }
- break;
- }
- if ( ! op ) {
- RExC_parse++;
- vFAIL3("Unknown verb pattern '%.*s'",
- verb_len, start_verb);
- }
- if ( argok ) {
- if ( start_arg && internal_argval ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else if ( argok < 0 && !start_arg ) {
- vFAIL3("Verb pattern '%.*s' has a mandatory argument",
- verb_len, start_verb);
- } else {
- ret = reganode(pRExC_state, op, internal_argval);
- if ( ! internal_argval && ! SIZE_ONLY ) {
- if (start_arg) {
- SV *sv = newSVpvn( start_arg, RExC_parse - start_arg);
- ARG(ret) = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[ARG(ret)]=(void*)sv;
- ret->flags = 0;
- } else {
- ret->flags = 1;
- }
- }
- }
- if (!internal_argval)
- RExC_seen |= REG_SEEN_VERBARG;
- } else if ( start_arg ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else {
- ret = reg_node(pRExC_state, op);
- }
- nextchar(pRExC_state);
- return ret;
- } else
- if (*RExC_parse == '?') { /* (?...) */
- bool is_logical = 0;
- const char * const seqstart = RExC_parse;
-
- RExC_parse++;
- paren = *RExC_parse++;
- ret = NULL; /* For look-ahead/behind. */
- switch (paren) {
-
- case 'P': /* (?P...) variants for those used to PCRE/Python */
- paren = *RExC_parse++;
- if ( paren == '<') /* (?P<...>) named capture */
- goto named_capture;
- else if (paren == '>') { /* (?P>name) named recursion */
- goto named_recursion;
- }
- else if (paren == '=') { /* (?P=...) named backref */
- /* this pretty much dupes the code for \k<NAME> in regatom(), if
- you change this make sure you change that */
- char* name_start = RExC_parse;
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ')')
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
-
- nextchar(pRExC_state);
- return ret;
- }
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- case '<': /* (?<...) */
- if (*RExC_parse == '!')
- paren = ',';
- else if (*RExC_parse != '=')
- named_capture:
- { /* (?<...>) */
- char *name_start;
- SV *svname;
- paren= '>';
- case '\'': /* (?'...') */
- name_start= RExC_parse;
- svname = reg_scan_name(pRExC_state,
- SIZE_ONLY ? /* reverse test from the others */
- REG_RSN_RETURN_NAME :
- REG_RSN_RETURN_NULL);
- if (RExC_parse == name_start) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- if (*RExC_parse != paren)
- vFAIL2("Sequence (?%c... not terminated",
- paren=='>' ? '<' : paren);
- if (SIZE_ONLY) {
- HE *he_str;
- SV *sv_dat = NULL;
- if (!svname) /* shouldnt happen */
- Perl_croak(aTHX_
- "panic: reg_scan_name returned NULL");
- if (!RExC_paren_names) {
- RExC_paren_names= newHV();
- sv_2mortal(MUTABLE_SV(RExC_paren_names));
-#ifdef DEBUGGING
- RExC_paren_name_list= newAV();
- sv_2mortal(MUTABLE_SV(RExC_paren_name_list));
-#endif
- }
- he_str = hv_fetch_ent( RExC_paren_names, svname, 1, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat ) {
- /* croak baby croak */
- Perl_croak(aTHX_
- "panic: paren_name hash element allocation failed");
- } else if ( SvPOK(sv_dat) ) {
- /* (?|...) can mean we have dupes so scan to check
- its already been stored. Maybe a flag indicating
- we are inside such a construct would be useful,
- but the arrays are likely to be quite small, so
- for now we punt -- dmq */
- IV count = SvIV(sv_dat);
- I32 *pv = (I32*)SvPVX(sv_dat);
- IV i;
- for ( i = 0 ; i < count ; i++ ) {
- if ( pv[i] == RExC_npar ) {
- count = 0;
- break;
- }
- }
- if ( count ) {
- pv = (I32*)SvGROW(sv_dat, SvCUR(sv_dat) + sizeof(I32)+1);
- SvCUR_set(sv_dat, SvCUR(sv_dat) + sizeof(I32));
- pv[count] = RExC_npar;
- SvIV_set(sv_dat, SvIVX(sv_dat) + 1);
- }
- } else {
- (void)SvUPGRADE(sv_dat,SVt_PVNV);
- sv_setpvn(sv_dat, (char *)&(RExC_npar), sizeof(I32));
- SvIOK_on(sv_dat);
- SvIV_set(sv_dat, 1);
- }
-#ifdef DEBUGGING
- if (!av_store(RExC_paren_name_list, RExC_npar, SvREFCNT_inc(svname)))
- SvREFCNT_dec(svname);
-#endif
-
- /*sv_dump(sv_dat);*/
- }
- nextchar(pRExC_state);
- paren = 1;
- goto capturing_parens;
- }
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- RExC_parse++;
- case '=': /* (?=...) */
- RExC_seen_zerolen++;
- break;
- case '!': /* (?!...) */
- RExC_seen_zerolen++;
- if (*RExC_parse == ')') {
- ret=reg_node(pRExC_state, OPFAIL);
- nextchar(pRExC_state);
- return ret;
- }
- break;
- case '|': /* (?|...) */
- /* branch reset, behave like a (?:...) except that
- buffers in alternations share the same numbers */
- paren = ':';
- after_freeze = freeze_paren = RExC_npar;
- break;
- case ':': /* (?:...) */
- case '>': /* (?>...) */
- break;
- case '$': /* (?$...) */
- case '@': /* (?@...) */
- vFAIL2("Sequence (?%c...) not implemented", (int)paren);
- break;
- case '#': /* (?#...) */
- while (*RExC_parse && *RExC_parse != ')')
- RExC_parse++;
- if (*RExC_parse != ')')
- FAIL("Sequence (?#... not terminated");
- nextchar(pRExC_state);
- *flagp = TRYAGAIN;
- return NULL;
- case '0' : /* (?0) */
- case 'R' : /* (?R) */
- if (*RExC_parse != ')')
- FAIL("Sequence (?R) not terminated");
- ret = reg_node(pRExC_state, GOSTART);
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- /*notreached*/
- { /* named and numeric backreferences */
- I32 num;
- case '&': /* (?&NAME) */
- parse_start = RExC_parse - 1;
- named_recursion:
- {
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- num = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- goto gen_recurse_regop;
- /* NOT REACHED */
- case '+':
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse++;
- vFAIL("Illegal pattern");
- }
- goto parse_recursion;
- /* NOT REACHED*/
- case '-': /* (?-1) */
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse--; /* rewind to let it be handled later */
- goto parse_flags;
- }
- /*FALLTHROUGH */
- case '1': case '2': case '3': case '4': /* (?1) */
- case '5': case '6': case '7': case '8': case '9':
- RExC_parse--;
- parse_recursion:
- num = atoi(RExC_parse);
- parse_start = RExC_parse - 1; /* MJD */
- if (*RExC_parse == '-')
- RExC_parse++;
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (*RExC_parse!=')')
- vFAIL("Expecting close bracket");
-
- gen_recurse_regop:
- if ( paren == '-' ) {
- /*
- Diagram of capture buffer numbering.
- Top line is the normal capture buffer numbers
- Botton line is the negative indexing as from
- the X (the (?-2))
-
- + 1 2 3 4 5 X 6 7
- /(a(x)y)(a(b(c(?-2)d)e)f)(g(h))/
- - 5 4 3 2 1 X x x
-
- */
- num = RExC_npar + num;
- if (num < 1) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- } else if ( paren == '+' ) {
- num = RExC_npar + num - 1;
- }
-
- ret = reganode(pRExC_state, GOSUB, num);
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- ARG2L_SET( ret, RExC_recurse_count++);
- RExC_emit++;
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Recurse #%"UVuf" to %"IVdf"\n", (UV)ARG(ret), (IV)ARG2L(ret)));
- } else {
- RExC_size++;
- }
- RExC_seen |= REG_SEEN_RECURSE;
- Set_Node_Length(ret, 1 + regarglen[OP(ret)]); /* MJD */
- Set_Node_Offset(ret, parse_start); /* MJD */
-
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- } /* named and numeric backreferences */
- /* NOT REACHED */
-
- case '?': /* (??...) */
- is_logical = 1;
- if (*RExC_parse != '{') {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- *flagp |= POSTPONED;
- paren = *RExC_parse++;
- /* FALL THROUGH */
- case '{': /* (?{...}) */
- {
- I32 count = 1;
- U32 n = 0;
- char c;
- char *s = RExC_parse;
-
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_EVAL;
- while (count && (c = *RExC_parse)) {
- if (c == '\\') {
- if (RExC_parse[1])
- RExC_parse++;
- }
- else if (c == '{')
- count++;
- else if (c == '}')
- count--;
- RExC_parse++;
- }
- if (*RExC_parse != ')') {
- RExC_parse = s;
- vFAIL("Sequence (?{...}) not terminated or not {}-balanced");
- }
- if (!SIZE_ONLY) {
- PAD *pad;
- OP_4tree *sop, *rop;
- SV * const sv = newSVpvn(s, RExC_parse - 1 - s);
-
- ENTER;
- Perl_save_re_context(aTHX);
- rop = sv_compile_2op(sv, &sop, "re", &pad);
- sop->op_private |= OPpREFCOUNTED;
- /* re_dup will OpREFCNT_inc */
- OpREFCNT_set(sop, 1);
- LEAVE;
-
- n = add_data(pRExC_state, 3, "nop");
- RExC_rxi->data->data[n] = (void*)rop;
- RExC_rxi->data->data[n+1] = (void*)sop;
- RExC_rxi->data->data[n+2] = (void*)pad;
- SvREFCNT_dec(sv);
- }
- else { /* First pass */
- if (PL_reginterp_cnt < ++RExC_seen_evals
- && IN_PERL_RUNTIME)
- /* No compiled RE interpolated, has runtime
- components ===> unsafe. */
- FAIL("Eval-group not allowed at runtime, use re 'eval'");
- if (PL_tainting && PL_tainted)
- FAIL("Eval-group in insecure regular expression");
-#if PERL_VERSION > 8
- if (IN_PERL_COMPILETIME)
- PL_cv_has_eval = 1;
-#endif
- }
-
- nextchar(pRExC_state);
- if (is_logical) {
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 2;
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, EVAL, n));
- /* deal with the length of this later - MJD */
- return ret;
- }
- ret = reganode(pRExC_state, EVAL, n);
- Set_Node_Length(ret, RExC_parse - parse_start + 1);
- Set_Node_Offset(ret, parse_start);
- return ret;
- }
- case '(': /* (?(?{...})...) and (?(?=...)...) */
- {
- int is_define= 0;
- if (RExC_parse[0] == '?') { /* (?(?...)) */
- if (RExC_parse[1] == '=' || RExC_parse[1] == '!'
- || RExC_parse[1] == '<'
- || RExC_parse[1] == '{') { /* Lookahead or eval. */
- I32 flag;
-
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 1;
- REGTAIL(pRExC_state, ret, reg(pRExC_state, 1, &flag,depth+1));
- goto insert_if;
- }
- }
- else if ( RExC_parse[0] == '<' /* (?(<NAME>)...) */
- || RExC_parse[0] == '\'' ) /* (?('NAME')...) */
- {
- char ch = RExC_parse[0] == '<' ? '>' : '\'';
- char *name_start= RExC_parse++;
- U32 num = 0;
- SV *sv_dat=reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence (?(%c... not terminated",
- (ch == '>' ? '<' : ch));
- RExC_parse++;
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- ret = reganode(pRExC_state,NGROUPP,num);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'D' &&
- RExC_parse[1] == 'E' &&
- RExC_parse[2] == 'F' &&
- RExC_parse[3] == 'I' &&
- RExC_parse[4] == 'N' &&
- RExC_parse[5] == 'E')
- {
- ret = reganode(pRExC_state,DEFINEP,0);
- RExC_parse +=6 ;
- is_define = 1;
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'R') {
- RExC_parse++;
- parno = 0;
- if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- parno = atoi(RExC_parse++);
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- } else if (RExC_parse[0] == '&') {
- SV *sv_dat;
- RExC_parse++;
- sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- parno = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- ret = reganode(pRExC_state,INSUBP,parno);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- /* (?(1)...) */
- char c;
- parno = atoi(RExC_parse++);
-
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- ret = reganode(pRExC_state, GROUPP, parno);
-
- insert_if_check_paren:
- if ((c = *nextchar(pRExC_state)) != ')')
- vFAIL("Switch condition not recognized");
- insert_if:
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0));
- br = regbranch(pRExC_state, &flags, 1,depth+1);
- if (br == NULL)
- br = reganode(pRExC_state, LONGJMP, 0);
- else
- REGTAIL(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0));
- c = *nextchar(pRExC_state);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- if (c == '|') {
- if (is_define)
- vFAIL("(?(DEFINE)....) does not allow branches");
- lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */
- regbranch(pRExC_state, &flags, 1,depth+1);
- REGTAIL(pRExC_state, ret, lastbr);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- c = *nextchar(pRExC_state);
- }
- else
- lastbr = NULL;
- if (c != ')')
- vFAIL("Switch (?(condition)... contains too many branches");
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, br, ender);
- if (lastbr) {
- REGTAIL(pRExC_state, lastbr, ender);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender);
- }
- else
- REGTAIL(pRExC_state, ret, ender);
- RExC_size++; /* XXX WHY do we need this?!!
- For large programs it seems to be required
- but I can't figure out why. -- dmq*/
- return ret;
- }
- else {
- vFAIL2("Unknown switch condition (?(%.2s", RExC_parse);
- }
- }
- case 0:
- RExC_parse--; /* for vFAIL to print correctly */
- vFAIL("Sequence (? incomplete");
- break;
- default:
- --RExC_parse;
- parse_flags: /* (?i) */
- {
- U32 posflags = 0, negflags = 0;
- U32 *flagsp = &posflags;
-
- while (*RExC_parse) {
- /* && strchr("iogcmsx", *RExC_parse) */
- /* (?g), (?gc) and (?o) are useless here
- and must be globally applied -- japhy */
- switch (*RExC_parse) {
- CASE_STD_PMMOD_FLAGS_PARSE_SET(flagsp);
- case ONCE_PAT_MOD: /* 'o' */
- case GLOBAL_PAT_MOD: /* 'g' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- const I32 wflagbit = *RExC_parse == 'o' ? WASTED_O : WASTED_G;
- if (! (wastedflags & wflagbit) ) {
- wastedflags |= wflagbit;
- vWARN5(
- RExC_parse + 1,
- "Useless (%s%c) - %suse /%c modifier",
- flagsp == &negflags ? "?-" : "?",
- *RExC_parse,
- flagsp == &negflags ? "don't " : "",
- *RExC_parse
- );
- }
- }
- break;
-
- case CONTINUE_PAT_MOD: /* 'c' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- if (! (wastedflags & WASTED_C) ) {
- wastedflags |= WASTED_GC;
- vWARN3(
- RExC_parse + 1,
- "Useless (%sc) - %suse /gc modifier",
- flagsp == &negflags ? "?-" : "?",
- flagsp == &negflags ? "don't " : ""
- );
- }
- }
- break;
- case KEEPCOPY_PAT_MOD: /* 'p' */
- if (flagsp == &negflags) {
- if (SIZE_ONLY && ckWARN(WARN_REGEXP))
- vWARN(RExC_parse + 1,"Useless use of (?-p)");
- } else {
- *flagsp |= RXf_PMf_KEEPCOPY;
- }
- break;
- case '-':
- if (flagsp == &negflags) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- flagsp = &negflags;
- wastedflags = 0; /* reset so (?g-c) warns twice */
- break;
- case ':':
- paren = ':';
- /*FALLTHROUGH*/
- case ')':
- RExC_flags |= posflags;
- RExC_flags &= ~negflags;
- if (paren != ':') {
- oregflags |= posflags;
- oregflags &= ~negflags;
- }
- nextchar(pRExC_state);
- if (paren != ':') {
- *flagp = TRYAGAIN;
- return NULL;
- } else {
- ret = NULL;
- goto parse_rest;
- }
- /*NOTREACHED*/
- default:
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- ++RExC_parse;
- }
- }} /* one for the default block, one for the switch */
- }
- else { /* (...) */
- capturing_parens:
- parno = RExC_npar;
- RExC_npar++;
-
- ret = reganode(pRExC_state, OPEN, parno);
- if (!SIZE_ONLY ){
- if (!RExC_nestroot)
- RExC_nestroot = parno;
- if (RExC_seen & REG_SEEN_RECURSE
- && !RExC_open_parens[parno-1])
- {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting open paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ret)));
- RExC_open_parens[parno-1]= ret;
- }
- }
- Set_Node_Length(ret, 1); /* MJD */
- Set_Node_Offset(ret, RExC_parse); /* MJD */
- is_open = 1;
- }
- }
- else /* ! paren */
- ret = NULL;
-
- parse_rest:
- /* Pick up the branches, linking them together. */
- parse_start = RExC_parse; /* MJD */
- br = regbranch(pRExC_state, &flags, 1,depth+1);
-
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
-
- /* branch_len = (paren != 0); */
-
- if (br == NULL)
- return(NULL);
- if (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, BRANCHJ, br, depth+1);
- }
- else { /* MJD */
- reginsert(pRExC_state, BRANCH, br, depth+1);
- Set_Node_Length(br, paren != 0);
- Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start);
- }
- have_branch = 1;
- if (SIZE_ONLY)
- RExC_extralen += 1; /* For BRANCHJ-BRANCH. */
- }
- else if (paren == ':') {
- *flagp |= flags&SIMPLE;
- }
- if (is_open) { /* Starts with OPEN. */
- REGTAIL(pRExC_state, ret, br); /* OPEN -> first. */
- }
- else if (paren != '?') /* Not Conditional */
- ret = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- lastbr = br;
- while (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- ender = reganode(pRExC_state, LONGJMP,0);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */
- }
- if (SIZE_ONLY)
- RExC_extralen += 2; /* Account for LONGJMP. */
- nextchar(pRExC_state);
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
- br = regbranch(pRExC_state, &flags, 0, depth+1);
-
- if (br == NULL)
- return(NULL);
- REGTAIL(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */
- lastbr = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- }
-
- if (have_branch || paren != ':') {
- /* Make a closing node, and hook it on the end. */
- switch (paren) {
- case ':':
- ender = reg_node(pRExC_state, TAIL);
- break;
- case 1:
- ender = reganode(pRExC_state, CLOSE, parno);
- if (!SIZE_ONLY && RExC_seen & REG_SEEN_RECURSE) {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting close paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ender)));
- RExC_close_parens[parno-1]= ender;
- if (RExC_nestroot == parno)
- RExC_nestroot = 0;
- }
- Set_Node_Offset(ender,RExC_parse+1); /* MJD */
- Set_Node_Length(ender,1); /* MJD */
- break;
- case '<':
- case ',':
- case '=':
- case '!':
- *flagp &= ~HASWIDTH;
- /* FALL THROUGH */
- case '>':
- ender = reg_node(pRExC_state, SUCCEED);
- break;
- case 0:
- ender = reg_node(pRExC_state, END);
- if (!SIZE_ONLY) {
- assert(!RExC_opend); /* there can only be one! */
- RExC_opend = ender;
- }
- break;
- }
- REGTAIL(pRExC_state, lastbr, ender);
-
- if (have_branch && !SIZE_ONLY) {
- if (depth==1)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
-
- /* Hook the tails of the branches to the closing node. */
- for (br = ret; br; br = regnext(br)) {
- const U8 op = PL_regkind[OP(br)];
- if (op == BRANCH) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(br), ender);
- }
- else if (op == BRANCHJ) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(NEXTOPER(br)), ender);
- }
- }
- }
- }
-
- {
- const char *p;
- static const char parens[] = "=!<,>";
-
- if (paren && (p = strchr(parens, paren))) {
- U8 node = ((p - parens) % 2) ? UNLESSM : IFMATCH;
- int flag = (p - parens) > 1;
-
- if (paren == '>')
- node = SUSPEND, flag = 0;
- reginsert(pRExC_state, node,ret, depth+1);
- Set_Node_Cur_Length(ret);
- Set_Node_Offset(ret, parse_start + 1);
- ret->flags = flag;
- REGTAIL_STUDY(pRExC_state, ret, reg_node(pRExC_state, TAIL));
- }
- }
-
- /* Check for proper termination. */
- if (paren) {
- RExC_flags = oregflags;
- if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched (");
- }
- }
- else if (!paren && RExC_parse < RExC_end) {
- if (*RExC_parse == ')') {
- RExC_parse++;
- vFAIL("Unmatched )");
- }
- else
- FAIL("Junk on end of regexp"); /* "Can't happen". */
- /* NOTREACHED */
- }
- if (after_freeze)
- RExC_npar = after_freeze;
- return(ret);
-}
-
-/*
- - regbranch - one alternative of an | operator
- *
- * Implements the concatenation operator.
- */
-STATIC regnode *
-S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register regnode *chain = NULL;
- register regnode *latest;
- I32 flags = 0, c = 0;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGBRANCH;
-
- DEBUG_PARSE("brnc");
-
- if (first)
- ret = NULL;
- else {
- if (!SIZE_ONLY && RExC_extralen)
- ret = reganode(pRExC_state, BRANCHJ,0);
- else {
- ret = reg_node(pRExC_state, BRANCH);
- Set_Node_Length(ret, 1);
- }
- }
-
- if (!first && SIZE_ONLY)
- RExC_extralen += 1; /* BRANCHJ */
-
- *flagp = WORST; /* Tentatively. */
-
- RExC_parse--;
- nextchar(pRExC_state);
- while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') {
- flags &= ~TRYAGAIN;
- latest = regpiece(pRExC_state, &flags,depth+1);
- if (latest == NULL) {
- if (flags & TRYAGAIN)
- continue;
- return(NULL);
- }
- else if (ret == NULL)
- ret = latest;
- *flagp |= flags&(HASWIDTH|POSTPONED);
- if (chain == NULL) /* First piece. */
- *flagp |= flags&SPSTART;
- else {
- RExC_naughty++;
- REGTAIL(pRExC_state, chain, latest);
- }
- chain = latest;
- c++;
- }
- if (chain == NULL) { /* Loop ran zero times. */
- chain = reg_node(pRExC_state, NOTHING);
- if (ret == NULL)
- ret = chain;
- }
- if (c == 1) {
- *flagp |= flags&SIMPLE;
- }
-
- return ret;
-}
-
-/*
- - regpiece - something followed by possible [*+?]
- *
- * Note that the branching code sequences used for ? and the general cases
- * of * and + are somewhat optimized: they use the same NOTHING node as
- * both the endmarker for their branch list and the body of the last branch.
- * It might seem that this node could be dispensed with entirely, but the
- * endmarker role is not redundant.
- */
-STATIC regnode *
-S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register char op;
- register char *next;
- I32 flags;
- const char * const origparse = RExC_parse;
- I32 min;
- I32 max = REG_INFTY;
- char *parse_start;
- const char *maxpos = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPIECE;
-
- DEBUG_PARSE("piec");
-
- ret = regatom(pRExC_state, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN)
- *flagp |= TRYAGAIN;
- return(NULL);
- }
-
- op = *RExC_parse;
-
- if (op == '{' && regcurly(RExC_parse)) {
- maxpos = NULL;
- parse_start = RExC_parse; /* MJD */
- next = RExC_parse + 1;
- while (isDIGIT(*next) || *next == ',') {
- if (*next == ',') {
- if (maxpos)
- break;
- else
- maxpos = next;
- }
- next++;
- }
- if (*next == '}') { /* got one */
- if (!maxpos)
- maxpos = next;
- RExC_parse++;
- min = atoi(RExC_parse);
- if (*maxpos == ',')
- maxpos++;
- else
- maxpos = RExC_parse;
- max = atoi(maxpos);
- if (!max && *maxpos != '0')
- max = REG_INFTY; /* meaning "infinity" */
- else if (max >= REG_INFTY)
- vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1);
- RExC_parse = next;
- nextchar(pRExC_state);
-
- do_curly:
- if ((flags&SIMPLE)) {
- RExC_naughty += 2 + RExC_naughty / 2;
- reginsert(pRExC_state, CURLY, ret, depth+1);
- Set_Node_Offset(ret, parse_start+1); /* MJD */
- Set_Node_Cur_Length(ret);
- }
- else {
- regnode * const w = reg_node(pRExC_state, WHILEM);
-
- w->flags = 0;
- REGTAIL(pRExC_state, ret, w);
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, LONGJMP,ret, depth+1);
- reginsert(pRExC_state, NOTHING,ret, depth+1);
- NEXT_OFF(ret) = 3; /* Go over LONGJMP. */
- }
- reginsert(pRExC_state, CURLYX,ret, depth+1);
- /* MJD hk */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Length(ret,
- op == '{' ? (RExC_parse - parse_start) : 1);
-
- if (!SIZE_ONLY && RExC_extralen)
- NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */
- REGTAIL(pRExC_state, ret, reg_node(pRExC_state, NOTHING));
- if (SIZE_ONLY)
- RExC_whilem_seen++, RExC_extralen += 3;
- RExC_naughty += 4 + RExC_naughty; /* compound interest */
- }
- ret->flags = 0;
-
- if (min > 0)
- *flagp = WORST;
- if (max > 0)
- *flagp |= HASWIDTH;
- if (max < min)
- vFAIL("Can't do {n,m} with n > m");
- if (!SIZE_ONLY) {
- ARG1_SET(ret, (U16)min);
- ARG2_SET(ret, (U16)max);
- }
-
- goto nest_check;
- }
- }
-
- if (!ISMULT1(op)) {
- *flagp = flags;
- return(ret);
- }
-
-#if 0 /* Now runtime fix should be reliable. */
-
- /* if this is reinstated, don't forget to put this back into perldiag:
-
- =item Regexp *+ operand could be empty at {#} in regex m/%s/
-
- (F) The part of the regexp subject to either the * or + quantifier
- could match an empty string. The {#} shows in the regular
- expression about where the problem was discovered.
-
- */
-
- if (!(flags&HASWIDTH) && op != '?')
- vFAIL("Regexp *+ operand could be empty");
-#endif
-
- parse_start = RExC_parse;
- nextchar(pRExC_state);
-
- *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH);
-
- if (op == '*' && (flags&SIMPLE)) {
- reginsert(pRExC_state, STAR, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 4;
- }
- else if (op == '*') {
- min = 0;
- goto do_curly;
- }
- else if (op == '+' && (flags&SIMPLE)) {
- reginsert(pRExC_state, PLUS, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 3;
- }
- else if (op == '+') {
- min = 1;
- goto do_curly;
- }
- else if (op == '?') {
- min = 0; max = 1;
- goto do_curly;
- }
- nest_check:
- if (!SIZE_ONLY && !(flags&(HASWIDTH|POSTPONED)) && max > REG_INFTY/3 && ckWARN(WARN_REGEXP)) {
- vWARN3(RExC_parse,
- "%.*s matches null string many times",
- (int)(RExC_parse >= origparse ? RExC_parse - origparse : 0),
- origparse);
- }
-
- if (RExC_parse < RExC_end && *RExC_parse == '?') {
- nextchar(pRExC_state);
- reginsert(pRExC_state, MINMOD, ret, depth+1);
- REGTAIL(pRExC_state, ret, ret + NODE_STEP_REGNODE);
- }
-#ifndef REG_ALLOW_MINMOD_SUSPEND
- else
-#endif
- if (RExC_parse < RExC_end && *RExC_parse == '+') {
- regnode *ender;
- nextchar(pRExC_state);
- ender = reg_node(pRExC_state, SUCCEED);
- REGTAIL(pRExC_state, ret, ender);
- reginsert(pRExC_state, SUSPEND, ret, depth+1);
- ret->flags = 0;
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, ret, ender);
- /*ret= ender;*/
- }
-
- if (RExC_parse < RExC_end && ISMULT2(RExC_parse)) {
- RExC_parse++;
- vFAIL("Nested quantifiers");
- }
-
- return(ret);
-}
-
-
-/* reg_namedseq(pRExC_state,UVp)
-
- This is expected to be called by a parser routine that has
- recognized '\N' and needs to handle the rest. RExC_parse is
- expected to point at the first char following the N at the time
- of the call.
-
- If valuep is non-null then it is assumed that we are parsing inside
- of a charclass definition and the first codepoint in the resolved
- string is returned via *valuep and the routine will return NULL.
- In this mode if a multichar string is returned from the charnames
- handler a warning will be issued, and only the first char in the
- sequence will be examined. If the string returned is zero length
- then the value of *valuep is undefined and NON-NULL will
- be returned to indicate failure. (This will NOT be a valid pointer
- to a regnode.)
-
- If valuep is null then it is assumed that we are parsing normal text
- and inserts a new EXACT node into the program containing the resolved
- string and returns a pointer to the new node. If the string is
- zerolength a NOTHING node is emitted.
-
- On success RExC_parse is set to the char following the endbrace.
- Parsing failures will generate a fatal errorvia vFAIL(...)
-
- NOTE: We cache all results from the charnames handler locally in
- the RExC_charnames hash (created on first use) to prevent a charnames
- handler from playing silly-buggers and returning a short string and
- then a long string for a given pattern. Since the regexp program
- size is calculated during an initial parse this would result
- in a buffer overrun so we cache to prevent the charname result from
- changing during the course of the parse.
-
- */
-STATIC regnode *
-S_reg_namedseq(pTHX_ RExC_state_t *pRExC_state, UV *valuep, I32 *flagp)
-{
- char * name; /* start of the content of the name */
- char * endbrace; /* endbrace following the name */
- SV *sv_str = NULL;
- SV *sv_name = NULL;
- STRLEN len; /* this has various purposes throughout the code */
- bool cached = 0; /* if this is true then we shouldn't refcount dev sv_str */
- regnode *ret = NULL;
-
- PERL_ARGS_ASSERT_REG_NAMEDSEQ;
-
- if (*RExC_parse != '{' ||
- (*RExC_parse == '{' && RExC_parse[1]
- && strchr("0123456789", RExC_parse[1])))
- {
- GET_RE_DEBUG_FLAGS_DECL;
- if (valuep)
- /* no bare \N in a charclass */
- vFAIL("Missing braces on \\N{}");
- GET_RE_DEBUG_FLAGS;
- nextchar(pRExC_state);
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- RExC_parse--;
- Set_Node_Length(ret, 1); /* MJD */
- return ret;
- }
- name = RExC_parse+1;
- endbrace = strchr(RExC_parse, '}');
- if ( ! endbrace ) {
- RExC_parse++;
- vFAIL("Missing right brace on \\N{}");
- }
- RExC_parse = endbrace + 1;
-
-
- /* RExC_parse points at the beginning brace,
- endbrace points at the last */
- if ( name[0]=='U' && name[1]=='+' ) {
- /* its a "Unicode hex" notation {U+89AB} */
- I32 fl = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX
- | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0);
- UV cp;
- len = (STRLEN)(endbrace - name - 2);
- cp = grok_hex(name + 2, &len, &fl, NULL);
- if ( len != (STRLEN)(endbrace - name - 2) ) {
- cp = 0xFFFD;
- }
- if ( valuep ) {
- if (cp > 0xff) RExC_utf8 = 1;
- *valuep = cp;
- return NULL;
- }
-
- /* Need to convert to utf8 if either: won't fit into a byte, or the re
- * is going to be in utf8 and the representation changes under utf8. */
- if (cp > 0xff || (RExC_utf8 && ! UNI_IS_INVARIANT(cp))) {
- U8 string[UTF8_MAXBYTES+1];
- U8 *tmps;
- RExC_utf8 = 1;
- tmps = uvuni_to_utf8(string, cp);
- sv_str = newSVpvn_utf8((char*)string, tmps - string, TRUE);
- } else { /* Otherwise, no need for utf8, can skip that step */
- char string;
- string = (char)cp;
- sv_str= newSVpvn(&string, 1);
- }
- } else {
- /* fetch the charnames handler for this scope */
- HV * const table = GvHV(PL_hintgv);
- SV **cvp= table ?
- hv_fetchs(table, "charnames", FALSE) :
- NULL;
- SV *cv= cvp ? *cvp : NULL;
- HE *he_str;
- int count;
- /* create an SV with the name as argument */
- sv_name = newSVpvn(name, endbrace - name);
-
- if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
- vFAIL2("Constant(\\N{%s}) unknown: "
- "(possibly a missing \"use charnames ...\")",
- SvPVX(sv_name));
- }
- if (!cvp || !SvOK(*cvp)) { /* when $^H{charnames} = undef; */
- vFAIL2("Constant(\\N{%s}): "
- "$^H{charnames} is not defined",SvPVX(sv_name));
- }
-
-
-
- if (!RExC_charnames) {
- /* make sure our cache is allocated */
- RExC_charnames = newHV();
- sv_2mortal(MUTABLE_SV(RExC_charnames));
- }
- /* see if we have looked this one up before */
- he_str = hv_fetch_ent( RExC_charnames, sv_name, 0, 0 );
- if ( he_str ) {
- sv_str = HeVAL(he_str);
- cached = 1;
- } else {
- dSP ;
-
- ENTER ;
- SAVETMPS ;
- PUSHMARK(SP) ;
-
- XPUSHs(sv_name);
-
- PUTBACK ;
-
- count= call_sv(cv, G_SCALAR);
-
- if (count == 1) { /* XXXX is this right? dmq */
- sv_str = POPs;
- SvREFCNT_inc_simple_void(sv_str);
- }
-
- SPAGAIN ;
- PUTBACK ;
- FREETMPS ;
- LEAVE ;
-
- if ( !sv_str || !SvOK(sv_str) ) {
- vFAIL2("Constant(\\N{%s}): Call to &{$^H{charnames}} "
- "did not return a defined value",SvPVX(sv_name));
- }
- if (hv_store_ent( RExC_charnames, sv_name, sv_str, 0))
- cached = 1;
- }
- }
- if (valuep) {
- char *p = SvPV(sv_str, len);
- if (len) {
- STRLEN numlen = 1;
- if ( SvUTF8(sv_str) ) {
- *valuep = utf8_to_uvchr((U8*)p, &numlen);
- if (*valuep > 0x7F)
- RExC_utf8 = 1;
- /* XXXX
- We have to turn on utf8 for high bit chars otherwise
- we get failures with
-
- "ss" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
- "SS" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
-
- This is different from what \x{} would do with the same
- codepoint, where the condition is > 0xFF.
- - dmq
- */
-
-
- } else {
- *valuep = (UV)*p;
- /* warn if we havent used the whole string? */
- }
- if (numlen<len && SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- vWARN2(RExC_parse,
- "Ignoring excess chars from \\N{%s} in character class",
- SvPVX(sv_name)
- );
- }
- } else if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- vWARN2(RExC_parse,
- "Ignoring zero length \\N{%s} in character class",
- SvPVX(sv_name)
- );
- }
- if (sv_name)
- SvREFCNT_dec(sv_name);
- if (!cached)
- SvREFCNT_dec(sv_str);
- return len ? NULL : (regnode *)&len;
- } else if(SvCUR(sv_str)) {
-
- char *s;
- char *p, *pend;
- STRLEN charlen = 1;
-#ifdef DEBUGGING
- char * parse_start = name-3; /* needed for the offsets */
-#endif
- GET_RE_DEBUG_FLAGS_DECL; /* needed for the offsets */
-
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s= STRING(ret);
-
- if ( RExC_utf8 && !SvUTF8(sv_str) ) {
- sv_utf8_upgrade(sv_str);
- } else if ( !RExC_utf8 && SvUTF8(sv_str) ) {
- RExC_utf8= 1;
- }
-
- p = SvPV(sv_str, len);
- pend = p + len;
- /* len is the length written, charlen is the size the char read */
- for ( len = 0; p < pend; p += charlen ) {
- if (UTF) {
- UV uvc = utf8_to_uvchr((U8*)p, &charlen);
- if (FOLD) {
- STRLEN foldlen,numlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
- uvc = toFOLD_uni(uvc, tmpbuf, &foldlen);
- /* Emit all the Unicode characters. */
-
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen)
- {
- uvc = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- } else {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- } else {
- len++;
- REGC(*p, s++);
- }
- }
- if (SIZE_ONLY) {
- RExC_size += STR_SZ(len);
- } else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- } else { /* zero length */
- ret = reg_node(pRExC_state,NOTHING);
- }
- if (!cached) {
- SvREFCNT_dec(sv_str);
- }
- if (sv_name) {
- SvREFCNT_dec(sv_name);
- }
- return ret;
-
-}
-
-
-/*
- * reg_recode
- *
- * It returns the code point in utf8 for the value in *encp.
- * value: a code value in the source encoding
- * encp: a pointer to an Encode object
- *
- * If the result from Encode is not a single character,
- * it returns U+FFFD (Replacement character) and sets *encp to NULL.
- */
-STATIC UV
-S_reg_recode(pTHX_ const char value, SV **encp)
-{
- STRLEN numlen = 1;
- SV * const sv = newSVpvn_flags(&value, numlen, SVs_TEMP);
- const char * const s = *encp ? sv_recode_to_utf8(sv, *encp) : SvPVX(sv);
- const STRLEN newlen = SvCUR(sv);
- UV uv = UNICODE_REPLACEMENT;
-
- PERL_ARGS_ASSERT_REG_RECODE;
-
- if (newlen)
- uv = SvUTF8(sv)
- ? utf8n_to_uvchr((U8*)s, newlen, &numlen, UTF8_ALLOW_DEFAULT)
- : *(U8*)s;
-
- if (!newlen || numlen != newlen) {
- uv = UNICODE_REPLACEMENT;
- *encp = NULL;
- }
- return uv;
-}
-
-
-/*
- - regatom - the lowest level
-
- Try to identify anything special at the start of the pattern. If there
- is, then handle it as required. This may involve generating a single regop,
- such as for an assertion; or it may involve recursing, such as to
- handle a () structure.
-
- If the string doesn't start with something special then we gobble up
- as much literal text as we can.
-
- Once we have been able to handle whatever type of thing started the
- sequence, we return.
-
- Note: we have to be careful with escapes, as they can be both literal
- and special, and in the case of \10 and friends can either, depending
- on context. Specifically there are two seperate switches for handling
- escape sequences, with the one for handling literal escapes requiring
- a dummy entry for all of the special escapes that are actually handled
- by the other.
-*/
-
-STATIC regnode *
-S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret = NULL;
- I32 flags;
- char *parse_start = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_PARSE("atom");
- *flagp = WORST; /* Tentatively. */
-
- PERL_ARGS_ASSERT_REGATOM;
-
-tryagain:
- switch ((U8)*RExC_parse) {
- case '^':
- RExC_seen_zerolen++;
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MBOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SBOL);
- else
- ret = reg_node(pRExC_state, BOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '$':
- nextchar(pRExC_state);
- if (*RExC_parse)
- RExC_seen_zerolen++;
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MEOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SEOL);
- else
- ret = reg_node(pRExC_state, EOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '.':
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SANY);
- else
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '[':
- {
- char * const oregcomp_parse = ++RExC_parse;
- ret = regclass(pRExC_state,depth+1);
- if (*RExC_parse != ']') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched [");
- }
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */
- break;
- }
- case '(':
- nextchar(pRExC_state);
- ret = reg(pRExC_state, 1, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN) {
- if (RExC_parse == RExC_end) {
- /* Make parent create an empty node if needed. */
- *flagp |= TRYAGAIN;
- return(NULL);
- }
- goto tryagain;
- }
- return(NULL);
- }
- *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE|POSTPONED);
- break;
- case '|':
- case ')':
- if (flags & TRYAGAIN) {
- *flagp |= TRYAGAIN;
- return NULL;
- }
- vFAIL("Internal urp");
- /* Supposed to be caught earlier. */
- break;
- case '{':
- if (!regcurly(RExC_parse)) {
- RExC_parse++;
- goto defchar;
- }
- /* FALL THROUGH */
- case '?':
- case '+':
- case '*':
- RExC_parse++;
- vFAIL("Quantifier follows nothing");
- break;
- case 0xDF:
- case 0xC3:
- case 0xCE:
- do_foldchar:
- if (!LOC && FOLD) {
- U32 len,cp;
- len=0; /* silence a spurious compiler warning */
- if ((cp = what_len_TRICKYFOLD_safe(RExC_parse,RExC_end,UTF,len))) {
- *flagp |= HASWIDTH; /* could be SIMPLE too, but needs a handler in regexec.regrepeat */
- RExC_parse+=len-1; /* we get one from nextchar() as well. :-( */
- ret = reganode(pRExC_state, FOLDCHAR, cp);
- Set_Node_Length(ret, 1); /* MJD */
- nextchar(pRExC_state); /* kill whitespace under /x */
- return ret;
- }
- }
- goto outer_default;
- case '\\':
- /* Special Escapes
-
- This switch handles escape sequences that resolve to some kind
- of special regop and not to literal text. Escape sequnces that
- resolve to literal text are handled below in the switch marked
- "Literal Escapes".
-
- Every entry in this switch *must* have a corresponding entry
- in the literal escape switch. However, the opposite is not
- required, as the default for this switch is to jump to the
- literal text handling code.
- */
- switch ((U8)*++RExC_parse) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- goto do_foldchar;
- /* Special Escapes */
- case 'A':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, SBOL);
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'G':
- ret = reg_node(pRExC_state, GPOS);
- RExC_seen |= REG_SEEN_GPOS;
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'K':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, KEEPS);
- *flagp |= SIMPLE;
- /* XXX:dmq : disabling in-place substitution seems to
- * be necessary here to avoid cases of memory corruption, as
- * with: C<$_="x" x 80; s/x\K/y/> -- rgs
- */
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- goto finish_meta_pat;
- case 'Z':
- ret = reg_node(pRExC_state, SEOL);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'z':
- ret = reg_node(pRExC_state, EOS);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'C':
- ret = reg_node(pRExC_state, CANY);
- RExC_seen |= REG_SEEN_CANY;
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'X':
- ret = reg_node(pRExC_state, CLUMP);
- *flagp |= HASWIDTH;
- goto finish_meta_pat;
- case 'w':
- ret = reg_node(pRExC_state, (U8)(LOC ? ALNUML : ALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'W':
- ret = reg_node(pRExC_state, (U8)(LOC ? NALNUML : NALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'b':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? BOUNDL : BOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'B':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? NBOUNDL : NBOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 's':
- ret = reg_node(pRExC_state, (U8)(LOC ? SPACEL : SPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'S':
- ret = reg_node(pRExC_state, (U8)(LOC ? NSPACEL : NSPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'd':
- ret = reg_node(pRExC_state, DIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'D':
- ret = reg_node(pRExC_state, NDIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'R':
- ret = reg_node(pRExC_state, LNBREAK);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'h':
- ret = reg_node(pRExC_state, HORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'H':
- ret = reg_node(pRExC_state, NHORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'v':
- ret = reg_node(pRExC_state, VERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'V':
- ret = reg_node(pRExC_state, NVERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- finish_meta_pat:
- nextchar(pRExC_state);
- Set_Node_Length(ret, 2); /* MJD */
- break;
- case 'p':
- case 'P':
- {
- char* const oldregxend = RExC_end;
-#ifdef DEBUGGING
- char* parse_start = RExC_parse - 2;
-#endif
-
- if (RExC_parse[1] == '{') {
- /* a lovely hack--pretend we saw [\pX] instead */
- RExC_end = strchr(RExC_parse, '}');
- if (!RExC_end) {
- const U8 c = (U8)*RExC_parse;
- RExC_parse += 2;
- RExC_end = oldregxend;
- vFAIL2("Missing right brace on \\%c{}", c);
- }
- RExC_end++;
- }
- else {
- RExC_end = RExC_parse + 2;
- if (RExC_end > oldregxend)
- RExC_end = oldregxend;
- }
- RExC_parse--;
-
- ret = regclass(pRExC_state,depth+1);
-
- RExC_end = oldregxend;
- RExC_parse--;
-
- Set_Node_Offset(ret, parse_start + 2);
- Set_Node_Cur_Length(ret);
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- }
- break;
- case 'N':
- /* Handle \N and \N{NAME} here and not below because it can be
- multicharacter. join_exact() will join them up later on.
- Also this makes sure that things like /\N{BLAH}+/ and
- \N{BLAH} being multi char Just Happen. dmq*/
- ++RExC_parse;
- ret= reg_namedseq(pRExC_state, NULL, flagp);
- break;
- case 'k': /* Handle \k<NAME> and \k'NAME' */
- parse_named_seq:
- {
- char ch= RExC_parse[1];
- if (ch != '<' && ch != '\'' && ch != '{') {
- RExC_parse++;
- vFAIL2("Sequence %.2s... not terminated",parse_start);
- } else {
- /* this pretty much dupes the code for (?P=...) in reg(), if
- you change this make sure you change that */
- char* name_start = (RExC_parse += 2);
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- ch= (ch == '<') ? '>' : (ch == '{') ? '}' : '\'';
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
-
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
-
- }
- break;
- }
- case 'g':
- case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 num;
- bool isg = *RExC_parse == 'g';
- bool isrel = 0;
- bool hasbrace = 0;
- if (isg) {
- RExC_parse++;
- if (*RExC_parse == '{') {
- RExC_parse++;
- hasbrace = 1;
- }
- if (*RExC_parse == '-') {
- RExC_parse++;
- isrel = 1;
- }
- if (hasbrace && !isDIGIT(*RExC_parse)) {
- if (isrel) RExC_parse--;
- RExC_parse -= 2;
- goto parse_named_seq;
- } }
- num = atoi(RExC_parse);
- if (isg && num == 0)
- vFAIL("Reference to invalid group 0");
- if (isrel) {
- num = RExC_npar - num;
- if (num < 1)
- vFAIL("Reference to nonexistent or unclosed group");
- }
- if (!isg && num > 9 && num >= RExC_npar)
- goto defchar;
- else {
- char * const parse_start = RExC_parse - 1; /* MJD */
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (parse_start == RExC_parse - 1)
- vFAIL("Unterminated \\g... pattern");
- if (hasbrace) {
- if (*RExC_parse != '}')
- vFAIL("Unterminated \\g{...} pattern");
- RExC_parse++;
- }
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens)
- vFAIL("Reference to nonexistent group");
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? REFFL : REFF) : REF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- }
- }
- break;
- case '\0':
- if (RExC_parse >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- /* Do not generate "unrecognized" warnings here, we fall
- back into the quick-grab loop below */
- parse_start--;
- goto defchar;
- }
- break;
-
- case '#':
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if ( reg_skipcomment( pRExC_state ) )
- goto tryagain;
- }
- /* FALL THROUGH */
-
- default:
- outer_default:{
- register STRLEN len;
- register UV ender;
- register char *p;
- char *s;
- STRLEN foldlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
-
- parse_start = RExC_parse - 1;
-
- RExC_parse++;
-
- defchar:
- ender = 0;
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s = STRING(ret);
- for (len = 0, p = RExC_parse - 1;
- len < 127 && p < RExC_end;
- len++)
- {
- char * const oldp = p;
-
- if (RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- switch ((U8)*p) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case '^':
- case '$':
- case '.':
- case '[':
- case '(':
- case ')':
- case '|':
- goto loopdone;
- case '\\':
- /* Literal Escapes Switch
-
- This switch is meant to handle escape sequences that
- resolve to a literal character.
-
- Every escape sequence that represents something
- else, like an assertion or a char class, is handled
- in the switch marked 'Special Escapes' above in this
- routine, but also has an entry here as anything that
- isn't explicitly mentioned here will be treated as
- an unescaped equivalent literal.
- */
-
- switch ((U8)*++p) {
- /* These are all the special escapes. */
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case 'A': /* Start assertion */
- case 'b': case 'B': /* Word-boundary assertion*/
- case 'C': /* Single char !DANGEROUS! */
- case 'd': case 'D': /* digit class */
- case 'g': case 'G': /* generic-backref, pos assertion */
- case 'h': case 'H': /* HORIZWS */
- case 'k': case 'K': /* named backref, keep marker */
- case 'N': /* named char sequence */
- case 'p': case 'P': /* Unicode property */
- case 'R': /* LNBREAK */
- case 's': case 'S': /* space class */
- case 'v': case 'V': /* VERTWS */
- case 'w': case 'W': /* word class */
- case 'X': /* eXtended Unicode "combining character sequence" */
- case 'z': case 'Z': /* End of line/string assertion */
- --p;
- goto loopdone;
-
- /* Anything after here is an escape that resolves to a
- literal. (Except digits, which may or may not)
- */
- case 'n':
- ender = '\n';
- p++;
- break;
- case 'r':
- ender = '\r';
- p++;
- break;
- case 't':
- ender = '\t';
- p++;
- break;
- case 'f':
- ender = '\f';
- p++;
- break;
- case 'e':
- ender = ASCII_TO_NATIVE('\033');
- p++;
- break;
- case 'a':
- ender = ASCII_TO_NATIVE('\007');
- p++;
- break;
- case 'x':
- if (*++p == '{') {
- char* const e = strchr(p, '}');
-
- if (!e) {
- RExC_parse = p + 1;
- vFAIL("Missing right brace on \\x{}");
- }
- else {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = e - p - 1;
- ender = grok_hex(p + 1, &numlen, &flags, NULL);
- if (ender > 0xff)
- RExC_utf8 = 1;
- p = e + 1;
- }
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = 2;
- ender = grok_hex(p, &numlen, &flags, NULL);
- p += numlen;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- p++;
- ender = UCHARAT(p++);
- ender = toCTRL(ender);
- break;
- case '0': case '1': case '2': case '3':case '4':
- case '5': case '6': case '7': case '8':case '9':
- if (*p == '0' ||
- (isDIGIT(p[1]) && atoi(p) >= RExC_npar) ) {
- I32 flags = 0;
- STRLEN numlen = 3;
- ender = grok_oct(p, &numlen, &flags, NULL);
-
- /* An octal above 0xff is interpreted differently
- * depending on if the re is in utf8 or not. If it
- * is in utf8, the value will be itself, otherwise
- * it is interpreted as modulo 0x100. It has been
- * decided to discourage the use of octal above the
- * single-byte range. For now, warn only when
- * it ends up modulo */
- if (SIZE_ONLY && ender >= 0x100
- && ! UTF && ! PL_encoding
- && ckWARN2(WARN_DEPRECATED, WARN_REGEXP)) {
- vWARNdep(p, "Use of octal value above 377 is deprecated");
- }
- p += numlen;
- }
- else {
- --p;
- goto loopdone;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- recode_encoding:
- {
- SV* enc = PL_encoding;
- ender = reg_recode((const char)(U8)ender, &enc);
- if (!enc && SIZE_ONLY && ckWARN(WARN_REGEXP))
- vWARN(p, "Invalid escape in the specified encoding");
- RExC_utf8 = 1;
- }
- break;
- case '\0':
- if (p >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- if (!SIZE_ONLY&& isALPHA(*p) && ckWARN(WARN_REGEXP))
- vWARN2(p + 1, "Unrecognized escape \\%c passed through", UCHARAT(p));
- goto normal_default;
- }
- break;
- default:
- normal_default:
- if (UTF8_IS_START(*p) && UTF) {
- STRLEN numlen;
- ender = utf8n_to_uvchr((U8*)p, RExC_end - p,
- &numlen, UTF8_ALLOW_DEFAULT);
- p += numlen;
- }
- else
- ender = *p++;
- break;
- }
- if ( RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- if (UTF && FOLD) {
- /* Prime the casefolded buffer. */
- ender = toFOLD_uni(ender, tmpbuf, &foldlen);
- }
- if (p < RExC_end && ISMULT2(p)) { /* Back off on ?+*. */
- if (len)
- p = oldp;
- else if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- }
- else {
- len++;
- REGC((char)ender, s++);
- }
- break;
- }
- if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- len += unilen;
- s += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break;
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- len--;
- }
- else
- REGC((char)ender, s++);
- }
- loopdone:
- RExC_parse = p - 1;
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
- {
- /* len is STRLEN which is unsigned, need to copy to signed */
- IV iv = len;
- if (iv < 0)
- vFAIL("Internal disaster");
- }
- if (len > 0)
- *flagp |= HASWIDTH;
- if (len == 1 && UNI_IS_INVARIANT(ender))
- *flagp |= SIMPLE;
-
- if (SIZE_ONLY)
- RExC_size += STR_SZ(len);
- else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- }
- break;
- }
-
- return(ret);
-}
-
-STATIC char *
-S_regwhite( RExC_state_t *pRExC_state, char *p )
-{
- const char *e = RExC_end;
-
- PERL_ARGS_ASSERT_REGWHITE;
-
- while (p < e) {
- if (isSPACE(*p))
- ++p;
- else if (*p == '#') {
- bool ended = 0;
- do {
- if (*p++ == '\n') {
- ended = 1;
- break;
- }
- } while (p < e);
- if (!ended)
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- }
- else
- break;
- }
- return p;
-}
-
-/* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]].
- Character classes ([:foo:]) can also be negated ([:^foo:]).
- Returns a named class id (ANYOF_XXX) if successful, -1 otherwise.
- Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed,
- but trigger failures because they are currently unimplemented. */
-
-#define POSIXCC_DONE(c) ((c) == ':')
-#define POSIXCC_NOTYET(c) ((c) == '=' || (c) == '.')
-#define POSIXCC(c) (POSIXCC_DONE(c) || POSIXCC_NOTYET(c))
-
-STATIC I32
-S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value)
-{
- dVAR;
- I32 namedclass = OOB_NAMEDCLASS;
-
- PERL_ARGS_ASSERT_REGPPOSIXCC;
-
- if (value == '[' && RExC_parse + 1 < RExC_end &&
- /* I smell either [: or [= or [. -- POSIX has been here, right? */
- POSIXCC(UCHARAT(RExC_parse))) {
- const char c = UCHARAT(RExC_parse);
- char* const s = RExC_parse++;
-
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != c)
- RExC_parse++;
- if (RExC_parse == RExC_end)
- /* Grandfather lone [:, [=, [. */
- RExC_parse = s;
- else {
- const char* const t = RExC_parse++; /* skip over the c */
- assert(*t == c);
-
- if (UCHARAT(RExC_parse) == ']') {
- const char *posixcc = s + 1;
- RExC_parse++; /* skip over the ending ] */
-
- if (*s == ':') {
- const I32 complement = *posixcc == '^' ? *posixcc++ : 0;
- const I32 skip = t - posixcc;
-
- /* Initially switch on the length of the name. */
- switch (skip) {
- case 4:
- if (memEQ(posixcc, "word", 4)) /* this is not POSIX, this is the Perl \w */
- namedclass = complement ? ANYOF_NALNUM : ANYOF_ALNUM;
- break;
- case 5:
- /* Names all of length 5. */
- /* alnum alpha ascii blank cntrl digit graph lower
- print punct space upper */
- /* Offset 4 gives the best switch position. */
- switch (posixcc[4]) {
- case 'a':
- if (memEQ(posixcc, "alph", 4)) /* alpha */
- namedclass = complement ? ANYOF_NALPHA : ANYOF_ALPHA;
- break;
- case 'e':
- if (memEQ(posixcc, "spac", 4)) /* space */
- namedclass = complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC;
- break;
- case 'h':
- if (memEQ(posixcc, "grap", 4)) /* graph */
- namedclass = complement ? ANYOF_NGRAPH : ANYOF_GRAPH;
- break;
- case 'i':
- if (memEQ(posixcc, "asci", 4)) /* ascii */
- namedclass = complement ? ANYOF_NASCII : ANYOF_ASCII;
- break;
- case 'k':
- if (memEQ(posixcc, "blan", 4)) /* blank */
- namedclass = complement ? ANYOF_NBLANK : ANYOF_BLANK;
- break;
- case 'l':
- if (memEQ(posixcc, "cntr", 4)) /* cntrl */
- namedclass = complement ? ANYOF_NCNTRL : ANYOF_CNTRL;
- break;
- case 'm':
- if (memEQ(posixcc, "alnu", 4)) /* alnum */
- namedclass = complement ? ANYOF_NALNUMC : ANYOF_ALNUMC;
- break;
- case 'r':
- if (memEQ(posixcc, "lowe", 4)) /* lower */
- namedclass = complement ? ANYOF_NLOWER : ANYOF_LOWER;
- else if (memEQ(posixcc, "uppe", 4)) /* upper */
- namedclass = complement ? ANYOF_NUPPER : ANYOF_UPPER;
- break;
- case 't':
- if (memEQ(posixcc, "digi", 4)) /* digit */
- namedclass = complement ? ANYOF_NDIGIT : ANYOF_DIGIT;
- else if (memEQ(posixcc, "prin", 4)) /* print */
- namedclass = complement ? ANYOF_NPRINT : ANYOF_PRINT;
- else if (memEQ(posixcc, "punc", 4)) /* punct */
- namedclass = complement ? ANYOF_NPUNCT : ANYOF_PUNCT;
- break;
- }
- break;
- case 6:
- if (memEQ(posixcc, "xdigit", 6))
- namedclass = complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT;
- break;
- }
-
- if (namedclass == OOB_NAMEDCLASS)
- Simple_vFAIL3("POSIX class [:%.*s:] unknown",
- t - s - 1, s + 1);
- assert (posixcc[skip] == ':');
- assert (posixcc[skip+1] == ']');
- } else if (!SIZE_ONLY) {
- /* [[=foo=]] and [[.foo.]] are still future. */
-
- /* adjust RExC_parse so the warning shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse) != ']')
- RExC_parse++;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- } else {
- /* Maternal grandfather:
- * "[:" ending in ":" but not in ":]" */
- RExC_parse = s;
- }
- }
- }
-
- return namedclass;
-}
-
-STATIC void
-S_checkposixcc(pTHX_ RExC_state_t *pRExC_state)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_CHECKPOSIXCC;
-
- if (POSIXCC(UCHARAT(RExC_parse))) {
- const char *s = RExC_parse;
- const char c = *s++;
-
- while (isALNUM(*s))
- s++;
- if (*s && c == *s && s[1] == ']') {
- if (ckWARN(WARN_REGEXP))
- vWARN3(s+2,
- "POSIX syntax [%c %c] belongs inside character classes",
- c, c);
-
- /* [[=foo=]] and [[.foo.]] are still future. */
- if (POSIXCC_NOTYET(c)) {
- /* adjust RExC_parse so the error shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse++) != ']')
- NOOP;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- }
- }
-}
-
-
-#define _C_C_T_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_N##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '!'; \
- what = WORD; \
- break
-
-#define _C_C_T_NOLOC_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '!'; \
- what = WORD; \
- break
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define POSIX_CC_UNI_NAME(CCNAME) CCNAME
-#else
-#define POSIX_CC_UNI_NAME(CCNAME) "Posix" CCNAME
-#endif
-
-/*
- parse a class specification and produce either an ANYOF node that
- matches the pattern or if the pattern matches a single char only and
- that char is < 256 and we are case insensitive then we produce an
- EXACT node instead.
-*/
-
-STATIC regnode *
-S_regclass(pTHX_ RExC_state_t *pRExC_state, U32 depth)
-{
- dVAR;
- register UV nextvalue;
- register IV prevvalue = OOB_UNICODE;
- register IV range = 0;
- UV value = 0; /* XXX:dmq: needs to be referenceable (unfortunately) */
- register regnode *ret;
- STRLEN numlen;
- IV namedclass;
- char *rangebegin = NULL;
- bool need_class = 0;
- SV *listsv = NULL;
- UV n;
- bool optimize_invert = TRUE;
- AV* unicode_alternate = NULL;
-#ifdef EBCDIC
- UV literal_endpoint = 0;
-#endif
- UV stored = 0; /* number of chars stored in the class */
-
- regnode * const orig_emit = RExC_emit; /* Save the original RExC_emit in
- case we need to change the emitted regop to an EXACT. */
- const char * orig_parse = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCLASS;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- DEBUG_PARSE("clas");
-
- /* Assume we are going to generate an ANYOF node. */
- ret = reganode(pRExC_state, ANYOF, 0);
-
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) = 0;
-
- if (UCHARAT(RExC_parse) == '^') { /* Complement of range. */
- RExC_naughty++;
- RExC_parse++;
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) |= ANYOF_INVERT;
- }
-
- if (SIZE_ONLY) {
- RExC_size += ANYOF_SKIP;
- listsv = &PL_sv_undef; /* For code scanners: listsv always non-NULL. */
- }
- else {
- RExC_emit += ANYOF_SKIP;
- if (FOLD)
- ANYOF_FLAGS(ret) |= ANYOF_FOLD;
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_LOCALE;
- ANYOF_BITMAP_ZERO(ret);
- listsv = newSVpvs("# comment\n");
- }
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
-
- if (!SIZE_ONLY && POSIXCC(nextvalue))
- checkposixcc(pRExC_state);
-
- /* allow 1st char to be ] (allowing it to be - is dealt with later) */
- if (UCHARAT(RExC_parse) == ']')
- goto charclassloop;
-
-parseit:
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != ']') {
-
- charclassloop:
-
- namedclass = OOB_NAMEDCLASS; /* initialize as illegal */
-
- if (!range)
- rangebegin = RExC_parse;
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
- if (value == '[' && POSIXCC(nextvalue))
- namedclass = regpposixcc(pRExC_state, value);
- else if (value == '\\') {
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
- /* Some compilers cannot handle switching on 64-bit integer
- * values, therefore value cannot be an UV. Yes, this will
- * be a problem later if we want switch on Unicode.
- * A similar issue a little bit later when switching on
- * namedclass. --jhi */
- switch ((I32)value) {
- case 'w': namedclass = ANYOF_ALNUM; break;
- case 'W': namedclass = ANYOF_NALNUM; break;
- case 's': namedclass = ANYOF_SPACE; break;
- case 'S': namedclass = ANYOF_NSPACE; break;
- case 'd': namedclass = ANYOF_DIGIT; break;
- case 'D': namedclass = ANYOF_NDIGIT; break;
- case 'v': namedclass = ANYOF_VERTWS; break;
- case 'V': namedclass = ANYOF_NVERTWS; break;
- case 'h': namedclass = ANYOF_HORIZWS; break;
- case 'H': namedclass = ANYOF_NHORIZWS; break;
- case 'N': /* Handle \N{NAME} in class */
- {
- /* We only pay attention to the first char of
- multichar strings being returned. I kinda wonder
- if this makes sense as it does change the behaviour
- from earlier versions, OTOH that behaviour was broken
- as well. */
- UV v; /* value is register so we cant & it /grrr */
- if (reg_namedseq(pRExC_state, &v, NULL)) {
- goto parseit;
- }
- value= v;
- }
- break;
- case 'p':
- case 'P':
- {
- char *e;
- if (RExC_parse >= RExC_end)
- vFAIL2("Empty \\%c{}", (U8)value);
- if (*RExC_parse == '{') {
- const U8 c = (U8)value;
- e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL2("Missing right brace on \\%c{}", c);
- while (isSPACE(UCHARAT(RExC_parse)))
- RExC_parse++;
- if (e == RExC_parse)
- vFAIL2("Empty \\%c{}", c);
- n = e - RExC_parse;
- while (isSPACE(UCHARAT(RExC_parse + n - 1)))
- n--;
- }
- else {
- e = RExC_parse;
- n = 1;
- }
- if (!SIZE_ONLY) {
- if (UCHARAT(RExC_parse) == '^') {
- RExC_parse++;
- n--;
- value = value == 'p' ? 'P' : 'p'; /* toggle */
- while (isSPACE(UCHARAT(RExC_parse))) {
- RExC_parse++;
- n--;
- }
- }
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::%.*s\n",
- (value=='p' ? '+' : '!'), (int)n, RExC_parse);
- }
- RExC_parse = e + 1;
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- namedclass = ANYOF_MAX; /* no official name, but it's named */
- }
- break;
- case 'n': value = '\n'; break;
- case 'r': value = '\r'; break;
- case 't': value = '\t'; break;
- case 'f': value = '\f'; break;
- case 'b': value = '\b'; break;
- case 'e': value = ASCII_TO_NATIVE('\033');break;
- case 'a': value = ASCII_TO_NATIVE('\007');break;
- case 'x':
- if (*RExC_parse == '{') {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- char * const e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL("Missing right brace on \\x{}");
-
- numlen = e - RExC_parse;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse = e + 1;
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- numlen = 2;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- }
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- value = UCHARAT(RExC_parse++);
- value = toCTRL(value);
- break;
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 flags = 0;
- numlen = 3;
- value = grok_oct(--RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- }
- recode_encoding:
- {
- SV* enc = PL_encoding;
- value = reg_recode((const char)(U8)value, &enc);
- if (!enc && SIZE_ONLY && ckWARN(WARN_REGEXP))
- vWARN(RExC_parse,
- "Invalid escape in the specified encoding");
- break;
- }
- default:
- if (!SIZE_ONLY && isALPHA(value) && ckWARN(WARN_REGEXP))
- vWARN2(RExC_parse,
- "Unrecognized escape \\%c in character class passed through",
- (int)value);
- break;
- }
- } /* end of \blah */
-#ifdef EBCDIC
- else
- literal_endpoint++;
-#endif
-
- if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */
-
- if (!SIZE_ONLY && !need_class)
- ANYOF_CLASS_ZERO(ret);
-
- need_class = 1;
-
- /* a bad range like a-\d, a-[:digit:] ? */
- if (range) {
- if (!SIZE_ONLY) {
- if (ckWARN(WARN_REGEXP)) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- vWARN4(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
- }
- if (prevvalue < 256) {
- ANYOF_BITMAP_SET(ret, prevvalue);
- ANYOF_BITMAP_SET(ret, '-');
- }
- else {
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-');
- }
- }
-
- range = 0; /* this was not a true range */
- }
-
-
-
- if (!SIZE_ONLY) {
- const char *what = NULL;
- char yesno = 0;
-
- if (namedclass > OOB_NAMEDCLASS)
- optimize_invert = FALSE;
- /* Possible truncation here but in some 64-bit environments
- * the compiler gets heartburn about switch on 64-bit values.
- * A similar issue a little earlier when switching on value.
- * --jhi */
- switch ((I32)namedclass) {
-
- case _C_C_T_(ALNUMC, isALNUMC(value), POSIX_CC_UNI_NAME("Alnum"));
- case _C_C_T_(ALPHA, isALPHA(value), POSIX_CC_UNI_NAME("Alpha"));
- case _C_C_T_(BLANK, isBLANK(value), POSIX_CC_UNI_NAME("Blank"));
- case _C_C_T_(CNTRL, isCNTRL(value), POSIX_CC_UNI_NAME("Cntrl"));
- case _C_C_T_(GRAPH, isGRAPH(value), POSIX_CC_UNI_NAME("Graph"));
- case _C_C_T_(LOWER, isLOWER(value), POSIX_CC_UNI_NAME("Lower"));
- case _C_C_T_(PRINT, isPRINT(value), POSIX_CC_UNI_NAME("Print"));
- case _C_C_T_(PSXSPC, isPSXSPC(value), POSIX_CC_UNI_NAME("Space"));
- case _C_C_T_(PUNCT, isPUNCT(value), POSIX_CC_UNI_NAME("Punct"));
- case _C_C_T_(UPPER, isUPPER(value), POSIX_CC_UNI_NAME("Upper"));
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
- case _C_C_T_(ALNUM, isALNUM(value), "Word");
- case _C_C_T_(SPACE, isSPACE(value), "SpacePerl");
-#else
- case _C_C_T_(SPACE, isSPACE(value), "PerlSpace");
- case _C_C_T_(ALNUM, isALNUM(value), "PerlWord");
-#endif
- case _C_C_T_(XDIGIT, isXDIGIT(value), "XDigit");
- case _C_C_T_NOLOC_(VERTWS, is_VERTWS_latin1(&value), "VertSpace");
- case _C_C_T_NOLOC_(HORIZWS, is_HORIZWS_latin1(&value), "HorizSpace");
- case ANYOF_ASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_ASCII);
- else {
-#ifndef EBCDIC
- for (value = 0; value < 128; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '+';
- what = "ASCII";
- break;
- case ANYOF_NASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NASCII);
- else {
-#ifndef EBCDIC
- for (value = 128; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (!isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '!';
- what = "ASCII";
- break;
- case ANYOF_DIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_DIGIT);
- else {
- /* consecutive digits assumed */
- for (value = '0'; value <= '9'; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '+';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_NDIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NDIGIT);
- else {
- /* consecutive digits assumed */
- for (value = 0; value < '0'; value++)
- ANYOF_BITMAP_SET(ret, value);
- for (value = '9' + 1; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '!';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_MAX:
- /* this is to handle \p and \P */
- break;
- default:
- vFAIL("Invalid [::] class");
- break;
- }
- if (what) {
- /* Strings such as "+utf8::isWord\n" */
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::Is%s\n", yesno, what);
- }
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_CLASS;
- continue;
- }
- } /* end of namedclass \blah */
-
- if (range) {
- if (prevvalue > (IV)value) /* b-a */ {
- const int w = RExC_parse - rangebegin;
- Simple_vFAIL4("Invalid [] range \"%*.*s\"", w, w, rangebegin);
- range = 0; /* not a valid range */
- }
- }
- else {
- prevvalue = value; /* save the beginning of the range */
- if (*RExC_parse == '-' && RExC_parse+1 < RExC_end &&
- RExC_parse[1] != ']') {
- RExC_parse++;
-
- /* a bad range like \w-, [:word:]- ? */
- if (namedclass > OOB_NAMEDCLASS) {
- if (ckWARN(WARN_REGEXP)) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- vWARN4(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
- }
- if (!SIZE_ONLY)
- ANYOF_BITMAP_SET(ret, '-');
- } else
- range = 1; /* yeah, it's a range! */
- continue; /* but do it the next time */
- }
- }
-
- /* now is the next time */
- /*stored += (value - prevvalue + 1);*/
- if (!SIZE_ONLY) {
- if (prevvalue < 256) {
- const IV ceilvalue = value < 256 ? value : 255;
- IV i;
-#ifdef EBCDIC
- /* In EBCDIC [\x89-\x91] should include
- * the \x8e but [i-j] should not. */
- if (literal_endpoint == 2 &&
- ((isLOWER(prevvalue) && isLOWER(ceilvalue)) ||
- (isUPPER(prevvalue) && isUPPER(ceilvalue))))
- {
- if (isLOWER(prevvalue)) {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isLOWER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- } else {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isUPPER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- else
-#endif
- for (i = prevvalue; i <= ceilvalue; i++) {
- if (!ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- if (value > 255 || UTF) {
- const UV prevnatvalue = NATIVE_TO_UNI(prevvalue);
- const UV natvalue = NATIVE_TO_UNI(value);
- stored+=2; /* can't optimize this class */
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- if (prevnatvalue < natvalue) { /* what about > ? */
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n",
- prevnatvalue, natvalue);
- }
- else if (prevnatvalue == natvalue) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", natvalue);
- if (FOLD) {
- U8 foldbuf[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const UV f = to_uni_fold(natvalue, foldbuf, &foldlen);
-
-#ifdef EBCDIC /* RD t/uni/fold ff and 6b */
- if (RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xDF || f == 0x92)) {
- f = NATIVE_TO_UNI(f);
- }
-#endif
- /* If folding and foldable and a single
- * character, insert also the folded version
- * to the charclass. */
- if (f != value) {
-#ifdef EBCDIC /* RD tunifold ligatures s,t fb05, fb06 */
- if ((RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xA2 &&
- (value == 0xFB05 || value == 0xFB06))) ?
- foldlen == ((STRLEN)UNISKIP(f) - 1) :
- foldlen == (STRLEN)UNISKIP(f) )
-#else
- if (foldlen == (STRLEN)UNISKIP(f))
-#endif
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n", f);
- else {
- /* Any multicharacter foldings
- * require the following transform:
- * [ABCDEF] -> (?:[ABCabcDEFd]|pq|rst)
- * where E folds into "pq" and F folds
- * into "rst", all other characters
- * fold to single characters. We save
- * away these multicharacter foldings,
- * to be later saved as part of the
- * additional "s" data. */
- SV *sv;
-
- if (!unicode_alternate)
- unicode_alternate = newAV();
- sv = newSVpvn_utf8((char*)foldbuf, foldlen,
- TRUE);
- av_push(unicode_alternate, sv);
- }
- }
-
- /* If folding and the value is one of the Greek
- * sigmas insert a few more sigmas to make the
- * folding rules of the sigmas to work right.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (literal or EXACTF cases) are handled
- * during runtime in regexec.c:S_find_byclass(). */
- if (value == UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA);
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- else if (value == UNICODE_GREEK_CAPITAL_LETTER_SIGMA)
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- }
- }
-#ifdef EBCDIC
- literal_endpoint = 0;
-#endif
- }
-
- range = 0; /* this range (if it was one) is done now */
- }
-
- if (need_class) {
- ANYOF_FLAGS(ret) |= ANYOF_LARGE;
- if (SIZE_ONLY)
- RExC_size += ANYOF_CLASS_ADD_SKIP;
- else
- RExC_emit += ANYOF_CLASS_ADD_SKIP;
- }
-
-
- if (SIZE_ONLY)
- return ret;
- /****** !SIZE_ONLY AFTER HERE *********/
-
- if( stored == 1 && (value < 128 || (value < 256 && !UTF))
- && !( ANYOF_FLAGS(ret) & ( ANYOF_FLAGS_ALL ^ ANYOF_FOLD ) )
- ) {
- /* optimize single char class to an EXACT node
- but *only* when its not a UTF/high char */
- const char * cur_parse= RExC_parse;
- RExC_emit = (regnode *)orig_emit;
- RExC_parse = (char *)orig_parse;
- ret = reg_node(pRExC_state,
- (U8)((ANYOF_FLAGS(ret) & ANYOF_FOLD) ? EXACTF : EXACT));
- RExC_parse = (char *)cur_parse;
- *STRING(ret)= (char)value;
- STR_LEN(ret)= 1;
- RExC_emit += STR_SZ(1);
- if (listsv) {
- SvREFCNT_dec(listsv);
- }
- return ret;
- }
- /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */
- if ( /* If the only flag is folding (plus possibly inversion). */
- ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD)
- ) {
- for (value = 0; value < 256; ++value) {
- if (ANYOF_BITMAP_TEST(ret, value)) {
- UV fold = PL_fold[value];
-
- if (fold != value)
- ANYOF_BITMAP_SET(ret, fold);
- }
- }
- ANYOF_FLAGS(ret) &= ~ANYOF_FOLD;
- }
-
- /* optimize inverted simple patterns (e.g. [^a-z]) */
- if (optimize_invert &&
- /* If the only flag is inversion. */
- (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) {
- for (value = 0; value < ANYOF_BITMAP_SIZE; ++value)
- ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL;
- ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL;
- }
- {
- AV * const av = newAV();
- SV *rv;
- /* The 0th element stores the character class description
- * in its textual form: used later (regexec.c:Perl_regclass_swash())
- * to initialize the appropriate swash (which gets stored in
- * the 1st element), and also useful for dumping the regnode.
- * The 2nd element stores the multicharacter foldings,
- * used later (regexec.c:S_reginclass()). */
- av_store(av, 0, listsv);
- av_store(av, 1, NULL);
- av_store(av, 2, MUTABLE_SV(unicode_alternate));
- rv = newRV_noinc(MUTABLE_SV(av));
- n = add_data(pRExC_state, 1, "s");
- RExC_rxi->data->data[n] = (void*)rv;
- ARG_SET(ret, n);
- }
- return ret;
-}
-#undef _C_C_T_
-
-
-/* reg_skipcomment()
-
- Absorbs an /x style # comments from the input stream.
- Returns true if there is more text remaining in the stream.
- Will set the REG_SEEN_RUN_ON_COMMENT flag if the comment
- terminates the pattern without including a newline.
-
- Note its the callers responsibility to ensure that we are
- actually in /x mode
-
-*/
-
-STATIC bool
-S_reg_skipcomment(pTHX_ RExC_state_t *pRExC_state)
-{
- bool ended = 0;
-
- PERL_ARGS_ASSERT_REG_SKIPCOMMENT;
-
- while (RExC_parse < RExC_end)
- if (*RExC_parse++ == '\n') {
- ended = 1;
- break;
- }
- if (!ended) {
- /* we ran off the end of the pattern without ending
- the comment, so we have to add an \n when wrapping */
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- return 0;
- } else
- return 1;
-}
-
-/* nextchar()
-
- Advance that parse position, and optionall absorbs
- "whitespace" from the inputstream.
-
- Without /x "whitespace" means (?#...) style comments only,
- with /x this means (?#...) and # comments and whitespace proper.
-
- Returns the RExC_parse point from BEFORE the scan occurs.
-
- This is the /x friendly way of saying RExC_parse++.
-*/
-
-STATIC char*
-S_nextchar(pTHX_ RExC_state_t *pRExC_state)
-{
- char* const retval = RExC_parse++;
-
- PERL_ARGS_ASSERT_NEXTCHAR;
-
- for (;;) {
- if (*RExC_parse == '(' && RExC_parse[1] == '?' &&
- RExC_parse[2] == '#') {
- while (*RExC_parse != ')') {
- if (RExC_parse == RExC_end)
- FAIL("Sequence (?#... not terminated");
- RExC_parse++;
- }
- RExC_parse++;
- continue;
- }
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if (isSPACE(*RExC_parse)) {
- RExC_parse++;
- continue;
- }
- else if (*RExC_parse == '#') {
- if ( reg_skipcomment( pRExC_state ) )
- continue;
- }
- }
- return retval;
- }
-}
-
-/*
-- reg_node - emit a node
-*/
-STATIC regnode * /* Location. */
-S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 1;
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE(ptr, op);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s:%d: (op %s) %s %"UVuf" (len %"UVuf") (max %"UVuf").\n",
- "reg_node", __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(RExC_emit, RExC_parse + (op == END));
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reganode - emit a node with an argument
-*/
-STATIC regnode * /* Location. */
-S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGANODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 2;
- /*
- We can't do this:
-
- assert(2==regarglen[op]+1);
-
- Anything larger than this has to allocate the extra amount.
- If we changed this to be:
-
- RExC_size += (1 + regarglen[op]);
-
- then it wouldn't matter. Its not clear what side effect
- might come from that so its not done so far.
- -- dmq
- */
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE_ARG(ptr, op, arg);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reganode",
- __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] ?
- "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Cur_Node_Offset;
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reguni - emit (if appropriate) a Unicode character
-*/
-STATIC STRLEN
-S_reguni(pTHX_ const RExC_state_t *pRExC_state, UV uv, char* s)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGUNI;
-
- return SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s);
-}
-
-/*
-- reginsert - insert an operator in front of already-emitted operand
-*
-* Means relocating the operand.
-*/
-STATIC void
-S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd, U32 depth)
-{
- dVAR;
- register regnode *src;
- register regnode *dst;
- register regnode *place;
- const int offset = regarglen[(U8)op];
- const int size = NODE_STEP_REGNODE + offset;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGINSERT;
- PERL_UNUSED_ARG(depth);
-/* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */
- DEBUG_PARSE_FMT("inst"," - %s",PL_reg_name[op]);
- if (SIZE_ONLY) {
- RExC_size += size;
- return;
- }
-
- src = RExC_emit;
- RExC_emit += size;
- dst = RExC_emit;
- if (RExC_open_parens) {
- int paren;
- /*DEBUG_PARSE_FMT("inst"," - %"IVdf, (IV)RExC_npar);*/
- for ( paren=0 ; paren < RExC_npar ; paren++ ) {
- if ( RExC_open_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("open"," - %d",size);*/
- RExC_open_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("open"," - %s","ok");*/
- }
- if ( RExC_close_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("close"," - %d",size);*/
- RExC_close_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("close"," - %s","ok");*/
- }
- }
- }
-
- while (src > opnd) {
- StructCopy(--src, --dst, regnode);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD 20010112 */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s copy %"UVuf" -> %"UVuf" (max %"UVuf").\n",
- "reg_insert",
- __LINE__,
- PL_reg_name[op],
- (UV)(dst - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(src - RExC_emit_start),
- (UV)(dst - RExC_emit_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src));
- Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src));
- }
-#endif
- }
-
-
- place = opnd; /* Op node, where operand used to be. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reginsert",
- __LINE__,
- PL_reg_name[op],
- (UV)(place - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(place - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(place, RExC_parse);
- Set_Node_Length(place, 1);
- }
-#endif
- src = NEXTOPER(place);
- FILL_ADVANCE_NODE(place, op);
- Zero(src, offset, regnode);
-}
-
-/*
-- regtail - set the next-pointer at the end of a node chain of p to val.
-- SEE ALSO: regtail_study
-*/
-/* TODO: All three parms should be const */
-STATIC void
-S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- if (SIZE_ONLY)
- return;
-
- /* Find last node. */
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tail" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) %s %s\n",
- SvPV_nolen_const(mysv), REG_NODE_NUM(scan),
- (temp == NULL ? "->" : ""),
- (temp == NULL ? PL_reg_name[OP(val)] : "")
- );
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
-
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-}
-
-#ifdef DEBUGGING
-/*
-- regtail_study - set the next-pointer at the end of a node chain of p to val.
-- Look for optimizable sequences at the same time.
-- currently only looks for EXACT chains.
-
-This is expermental code. The idea is to use this routine to perform
-in place optimizations on branches and groups as they are constructed,
-with the long term intention of removing optimization from study_chunk so
-that it is purely analytical.
-
-Currently only used when in DEBUG mode. The macro REGTAIL_STUDY() is used
-to control which is which.
-
-*/
-/* TODO: All four parms should be const */
-
-STATIC U8
-S_regtail_study(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- U8 exact = PSEUDO;
-#ifdef EXPERIMENTAL_INPLACESCAN
- I32 min = 0;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL_STUDY;
-
-
- if (SIZE_ONLY)
- return exact;
-
- /* Find last node. */
-
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (PL_regkind[OP(scan)] == EXACT)
- if (join_exact(pRExC_state,scan,&min,1,val,depth+1))
- return EXACT;
-#endif
- if ( exact ) {
- switch (OP(scan)) {
- case EXACT:
- case EXACTF:
- case EXACTFL:
- if( exact == PSEUDO )
- exact= OP(scan);
- else if ( exact != OP(scan) )
- exact= 0;
- case NOTHING:
- break;
- default:
- exact= 0;
- }
- }
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tsdy" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) -> %s\n",
- SvPV_nolen_const(mysv),
- REG_NODE_NUM(scan),
- PL_reg_name[exact]);
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
- DEBUG_PARSE_r({
- SV * const mysv_val=sv_newmortal();
- DEBUG_PARSE_MSG("");
- regprop(RExC_rx, mysv_val, val);
- PerlIO_printf(Perl_debug_log, "~ attach to %s (%"IVdf") offset to %"IVdf"\n",
- SvPV_nolen_const(mysv_val),
- (IV)REG_NODE_NUM(val),
- (IV)(val - scan)
- );
- });
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-
- return exact;
-}
-#endif
-
-/*
- - regcurly - a little FSA that accepts {\d+,?\d*}
- */
-STATIC I32
-S_regcurly(register const char *s)
-{
- PERL_ARGS_ASSERT_REGCURLY;
-
- if (*s++ != '{')
- return FALSE;
- if (!isDIGIT(*s))
- return FALSE;
- while (isDIGIT(*s))
- s++;
- if (*s == ',')
- s++;
- while (isDIGIT(*s))
- s++;
- if (*s != '}')
- return FALSE;
- return TRUE;
-}
-
-
-/*
- - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form
- */
-#ifdef DEBUGGING
-static void
-S_regdump_extflags(pTHX_ const char *lead, const U32 flags)
-{
- int bit;
- int set=0;
-
- for (bit=0; bit<32; bit++) {
- if (flags & (1<<bit)) {
- if (!set++ && lead)
- PerlIO_printf(Perl_debug_log, "%s",lead);
- PerlIO_printf(Perl_debug_log, "%s ",PL_reg_extflags_name[bit]);
- }
- }
- if (lead) {
- if (set)
- PerlIO_printf(Perl_debug_log, "\n");
- else
- PerlIO_printf(Perl_debug_log, "%s[none-set]\n",lead);
- }
-}
-#endif
-
-void
-Perl_regdump(pTHX_ const regexp *r)
-{
-#ifdef DEBUGGING
- dVAR;
- SV * const sv = sv_newmortal();
- SV *dsv= sv_newmortal();
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGDUMP;
-
- (void)dumpuntil(r, ri->program, ri->program + 1, NULL, NULL, sv, 0, 0);
-
- /* Header fields of interest. */
- if (r->anchored_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->anchored_substr),
- RE_SV_DUMPLEN(r->anchored_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_substr),
- (IV)r->anchored_offset);
- } else if (r->anchored_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->anchored_utf8),
- RE_SV_DUMPLEN(r->anchored_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored utf8 %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_utf8),
- (IV)r->anchored_offset);
- }
- if (r->float_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->float_substr),
- RE_SV_DUMPLEN(r->float_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "floating %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_substr),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- } else if (r->float_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->float_utf8),
- RE_SV_DUMPLEN(r->float_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "floating utf8 %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_utf8),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- }
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log,
- (const char *)
- (r->check_substr == r->float_substr
- && r->check_utf8 == r->float_utf8
- ? "(checking floating" : "(checking anchored"));
- if (r->extflags & RXf_NOSCAN)
- PerlIO_printf(Perl_debug_log, " noscan");
- if (r->extflags & RXf_CHECK_ALL)
- PerlIO_printf(Perl_debug_log, " isall");
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log, ") ");
-
- if (ri->regstclass) {
- regprop(r, sv, ri->regstclass);
- PerlIO_printf(Perl_debug_log, "stclass %s ", SvPVX_const(sv));
- }
- if (r->extflags & RXf_ANCH) {
- PerlIO_printf(Perl_debug_log, "anchored");
- if (r->extflags & RXf_ANCH_BOL)
- PerlIO_printf(Perl_debug_log, "(BOL)");
- if (r->extflags & RXf_ANCH_MBOL)
- PerlIO_printf(Perl_debug_log, "(MBOL)");
- if (r->extflags & RXf_ANCH_SBOL)
- PerlIO_printf(Perl_debug_log, "(SBOL)");
- if (r->extflags & RXf_ANCH_GPOS)
- PerlIO_printf(Perl_debug_log, "(GPOS)");
- PerlIO_putc(Perl_debug_log, ' ');
- }
- if (r->extflags & RXf_GPOS_SEEN)
- PerlIO_printf(Perl_debug_log, "GPOS:%"UVuf" ", (UV)r->gofs);
- if (r->intflags & PREGf_SKIP)
- PerlIO_printf(Perl_debug_log, "plus ");
- if (r->intflags & PREGf_IMPLICIT)
- PerlIO_printf(Perl_debug_log, "implicit ");
- PerlIO_printf(Perl_debug_log, "minlen %"IVdf" ", (IV)r->minlen);
- if (r->extflags & RXf_EVAL_SEEN)
- PerlIO_printf(Perl_debug_log, "with eval ");
- PerlIO_printf(Perl_debug_log, "\n");
- DEBUG_FLAGS_r(regdump_extflags("r->extflags: ",r->extflags));
-#else
- PERL_ARGS_ASSERT_REGDUMP;
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(r);
-#endif /* DEBUGGING */
-}
-
-/*
-- regprop - printable representation of opcode
-*/
-#define EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags) \
-STMT_START { \
- if (do_sep) { \
- Perl_sv_catpvf(aTHX_ sv,"%s][%s",PL_colors[1],PL_colors[0]); \
- if (flags & ANYOF_INVERT) \
- /*make sure the invert info is in each */ \
- sv_catpvs(sv, "^"); \
- do_sep = 0; \
- } \
-} STMT_END
-
-void
-Perl_regprop(pTHX_ const regexp *prog, SV *sv, const regnode *o)
-{
-#ifdef DEBUGGING
- dVAR;
- register int k;
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPROP;
-
- sv_setpvs(sv, "");
-
- if (OP(o) > REGNODE_MAX) /* regnode.type is unsigned */
- /* It would be nice to FAIL() here, but this may be called from
- regexec.c, and it would be hard to supply pRExC_state. */
- Perl_croak(aTHX_ "Corrupted regexp opcode %d > %d", (int)OP(o), (int)REGNODE_MAX);
- sv_catpv(sv, PL_reg_name[OP(o)]); /* Take off const! */
-
- k = PL_regkind[OP(o)];
-
- if (k == EXACT) {
- sv_catpvs(sv, " ");
- /* Using is_utf8_string() (via PERL_PV_UNI_DETECT)
- * is a crude hack but it may be the best for now since
- * we have no flag "this EXACTish node was UTF-8"
- * --jhi */
- pv_pretty(sv, STRING(o), STR_LEN(o), 60, PL_colors[0], PL_colors[1],
- PERL_PV_ESCAPE_UNI_DETECT |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT |
- PERL_PV_PRETTY_NOCLEAR
- );
- } else if (k == TRIE) {
- /* print the details of the trie in dumpuntil instead, as
- * progi->data isn't available here */
- const char op = OP(o);
- const U32 n = ARG(o);
- const reg_ac_data * const ac = IS_TRIE_AC(op) ?
- (reg_ac_data *)progi->data->data[n] :
- NULL;
- const reg_trie_data * const trie
- = (reg_trie_data*)progi->data->data[!IS_TRIE_AC(op) ? n : ac->trie];
-
- Perl_sv_catpvf(aTHX_ sv, "-%s",PL_reg_name[o->flags]);
- DEBUG_TRIE_COMPILE_r(
- Perl_sv_catpvf(aTHX_ sv,
- "<S:%"UVuf"/%"IVdf" W:%"UVuf" L:%"UVuf"/%"UVuf" C:%"UVuf"/%"UVuf">",
- (UV)trie->startstate,
- (IV)trie->statecount-1, /* -1 because of the unused 0 element */
- (UV)trie->wordcount,
- (UV)trie->minlen,
- (UV)trie->maxlen,
- (UV)TRIE_CHARCOUNT(trie),
- (UV)trie->uniquecharcount
- )
- );
- if ( IS_ANYOF_TRIE(op) || trie->bitmap ) {
- int i;
- int rangestart = -1;
- U8* bitmap = IS_ANYOF_TRIE(op) ? (U8*)ANYOF_BITMAP(o) : (U8*)TRIE_BITMAP(trie);
- sv_catpvs(sv, "[");
- for (i = 0; i <= 256; i++) {
- if (i < 256 && BITMAP_TEST(bitmap,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- rangestart = -1;
- }
- }
- sv_catpvs(sv, "]");
- }
-
- } else if (k == CURLY) {
- if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */
- Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o));
- }
- else if (k == WHILEM && o->flags) /* Ordinal/of */
- Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4);
- else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP || OP(o)==ACCEPT) {
- Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */
- if ( RXp_PAREN_NAMES(prog) ) {
- if ( k != REF || OP(o) < NREF) {
- AV *list= MUTABLE_AV(progi->data->data[progi->name_list_idx]);
- SV **name= av_fetch(list, ARG(o), 0 );
- if (name)
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- else {
- AV *list= MUTABLE_AV(progi->data->data[ progi->name_list_idx ]);
- SV *sv_dat= MUTABLE_SV(progi->data->data[ ARG( o ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
- SV **name= av_fetch(list, nums[0], 0 );
- I32 n;
- if (name) {
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- Perl_sv_catpvf(aTHX_ sv, "%s%"IVdf,
- (n ? "," : ""), (IV)nums[n]);
- }
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- }
- }
- } else if (k == GOSUB)
- Perl_sv_catpvf(aTHX_ sv, "%d[%+d]", (int)ARG(o),(int)ARG2L(o)); /* Paren and offset */
- else if (k == VERB) {
- if (!o->flags)
- Perl_sv_catpvf(aTHX_ sv, ":%"SVf,
- SVfARG((MUTABLE_SV(progi->data->data[ ARG( o ) ]))));
- } else if (k == LOGICAL)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */
- else if (k == FOLDCHAR)
- Perl_sv_catpvf(aTHX_ sv, "[0x%"UVXf"]", PTR2UV(ARG(o)) );
- else if (k == ANYOF) {
- int i, rangestart = -1;
- const U8 flags = ANYOF_FLAGS(o);
- int do_sep = 0;
-
- /* Should be synchronized with * ANYOF_ #xdefines in regcomp.h */
- static const char * const anyofs[] = {
- "\\w",
- "\\W",
- "\\s",
- "\\S",
- "\\d",
- "\\D",
- "[:alnum:]",
- "[:^alnum:]",
- "[:alpha:]",
- "[:^alpha:]",
- "[:ascii:]",
- "[:^ascii:]",
- "[:cntrl:]",
- "[:^cntrl:]",
- "[:graph:]",
- "[:^graph:]",
- "[:lower:]",
- "[:^lower:]",
- "[:print:]",
- "[:^print:]",
- "[:punct:]",
- "[:^punct:]",
- "[:upper:]",
- "[:^upper:]",
- "[:xdigit:]",
- "[:^xdigit:]",
- "[:space:]",
- "[:^space:]",
- "[:blank:]",
- "[:^blank:]"
- };
-
- if (flags & ANYOF_LOCALE)
- sv_catpvs(sv, "{loc}");
- if (flags & ANYOF_FOLD)
- sv_catpvs(sv, "{i}");
- Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]);
- if (flags & ANYOF_INVERT)
- sv_catpvs(sv, "^");
-
- /* output what the standard cp 0-255 bitmap matches */
- for (i = 0; i <= 256; i++) {
- if (i < 256 && ANYOF_BITMAP_TEST(o,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- do_sep = 1;
- rangestart = -1;
- }
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
- /* output any special charclass tests (used mostly under use locale) */
- if (o->flags & ANYOF_CLASS)
- for (i = 0; i < (int)(sizeof(anyofs)/sizeof(char*)); i++)
- if (ANYOF_CLASS_TEST(o,i)) {
- sv_catpv(sv, anyofs[i]);
- do_sep = 1;
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
-
- /* output information about the unicode matching */
- if (flags & ANYOF_UNICODE)
- sv_catpvs(sv, "{unicode}");
- else if (flags & ANYOF_UNICODE_ALL)
- sv_catpvs(sv, "{unicode_all}");
-
- {
- SV *lv;
- SV * const sw = regclass_swash(prog, o, FALSE, &lv, 0);
-
- if (lv) {
- if (sw) {
- U8 s[UTF8_MAXBYTES_CASE+1];
-
- for (i = 0; i <= 256; i++) { /* just the first 256 */
- uvchr_to_utf8(s, i);
-
- if (i < 256 && swash_fetch(sw, s, TRUE)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++) {
- const U8 * const e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for(p = s; p < e; p++)
- put_byte(sv, *p);
- }
- else {
- const U8 *e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- sv_catpvs(sv, "-");
- e = uvchr_to_utf8(s, i-1);
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- }
- rangestart = -1;
- }
- }
-
- sv_catpvs(sv, "..."); /* et cetera */
- }
-
- {
- char *s = savesvpv(lv);
- char * const origs = s;
-
- while (*s && *s != '\n')
- s++;
-
- if (*s == '\n') {
- const char * const t = ++s;
-
- while (*s) {
- if (*s == '\n')
- *s = ' ';
- s++;
- }
- if (s[-1] == ' ')
- s[-1] = 0;
-
- sv_catpv(sv, t);
- }
-
- Safefree(origs);
- }
- }
- }
-
- Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]);
- }
- else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH))
- Perl_sv_catpvf(aTHX_ sv, "[%d]", -(o->flags));
-#else
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(sv);
- PERL_UNUSED_ARG(o);
- PERL_UNUSED_ARG(prog);
-#endif /* DEBUGGING */
-}
-
-SV *
-Perl_re_intuit_string(pTHX_ REGEXP * const r)
-{ /* Assume that RE_INTUIT is set */
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_STRING;
- PERL_UNUSED_CONTEXT;
-
- DEBUG_COMPILE_r(
- {
- const char * const s = SvPV_nolen_const(prog->check_substr
- ? prog->check_substr : prog->check_utf8);
-
- if (!PL_colorset) reginitcolors();
- PerlIO_printf(Perl_debug_log,
- "%sUsing REx %ssubstr:%s \"%s%.60s%s%s\"\n",
- PL_colors[4],
- prog->check_substr ? "" : "utf8 ",
- PL_colors[5],PL_colors[0],
- s,
- PL_colors[1],
- (strlen(s) > 60 ? "..." : ""));
- } );
-
- return prog->check_substr ? prog->check_substr : prog->check_utf8;
-}
-
-/*
- pregfree()
-
- handles refcounting and freeing the perl core regexp structure. When
- it is necessary to actually free the structure the first thing it
- does is call the 'free' method of the regexp_engine associated to to
- the regexp, allowing the handling of the void *pprivate; member
- first. (This routine is not overridable by extensions, which is why
- the extensions free is called first.)
-
- See regdupe and regdupe_internal if you change anything here.
-*/
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_pregfree(pTHX_ REGEXP *r)
-{
- SvREFCNT_dec(r);
-}
-
-void
-Perl_pregfree2(pTHX_ REGEXP *rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_PREGFREE2;
-
- if (r->mother_re) {
- ReREFCNT_dec(r->mother_re);
- } else {
- CALLREGFREE_PVT(rx); /* free the private data */
- if (RXp_PAREN_NAMES(r))
- SvREFCNT_dec(RXp_PAREN_NAMES(r));
- }
- if (r->substrs) {
- if (r->anchored_substr)
- SvREFCNT_dec(r->anchored_substr);
- if (r->anchored_utf8)
- SvREFCNT_dec(r->anchored_utf8);
- if (r->float_substr)
- SvREFCNT_dec(r->float_substr);
- if (r->float_utf8)
- SvREFCNT_dec(r->float_utf8);
- Safefree(r->substrs);
- }
- RX_MATCH_COPY_FREE(rx);
-#ifdef PERL_OLD_COPY_ON_WRITE
- if (r->saved_copy)
- SvREFCNT_dec(r->saved_copy);
-#endif
- Safefree(r->offs);
-}
-
-/* reg_temp_copy()
-
- This is a hacky workaround to the structural issue of match results
- being stored in the regexp structure which is in turn stored in
- PL_curpm/PL_reg_curpm. The problem is that due to qr// the pattern
- could be PL_curpm in multiple contexts, and could require multiple
- result sets being associated with the pattern simultaneously, such
- as when doing a recursive match with (??{$qr})
-
- The solution is to make a lightweight copy of the regexp structure
- when a qr// is returned from the code executed by (??{$qr}) this
- lightweight copy doesnt actually own any of its data except for
- the starp/end and the actual regexp structure itself.
-
-*/
-
-
-REGEXP *
-Perl_reg_temp_copy (pTHX_ REGEXP *rx)
-{
- REGEXP *ret_x = (REGEXP*) newSV_type(SVt_REGEXP);
- struct regexp *ret = (struct regexp *)SvANY(ret_x);
- struct regexp *const r = (struct regexp *)SvANY(rx);
- register const I32 npar = r->nparens+1;
-
- PERL_ARGS_ASSERT_REG_TEMP_COPY;
-
- (void)ReREFCNT_inc(rx);
- /* We can take advantage of the existing "copied buffer" mechanism in SVs
- by pointing directly at the buffer, but flagging that the allocated
- space in the copy is zero. As we've just done a struct copy, it's now
- a case of zero-ing that, rather than copying the current length. */
- SvPV_set(ret_x, RX_WRAPPED(rx));
- SvFLAGS(ret_x) |= SvFLAGS(rx) & (SVf_POK|SVp_POK|SVf_UTF8);
- memcpy(&(ret->xpv_cur), &(r->xpv_cur),
- sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur));
- SvLEN_set(ret_x, 0);
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if (r->substrs) {
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- SvREFCNT_inc_void(ret->anchored_substr);
- SvREFCNT_inc_void(ret->anchored_utf8);
- SvREFCNT_inc_void(ret->float_substr);
- SvREFCNT_inc_void(ret->float_utf8);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
- }
- RX_MATCH_COPIED_off(ret_x);
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
- ret->mother_re = rx;
-
- return ret_x;
-}
-#endif
-
-/* regfree_internal()
-
- Free the private data in a regexp. This is overloadable by
- extensions. Perl takes care of the regexp structure in pregfree(),
- this covers the *pprivate pointer which technically perldoesnt
- know about, however of course we have to handle the
- regexp_internal structure when no extension is in use.
-
- Note this is called before freeing anything in the regexp
- structure.
- */
-
-void
-Perl_regfree_internal(pTHX_ REGEXP * const rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGFREE_INTERNAL;
-
- DEBUG_COMPILE_r({
- if (!PL_colorset)
- reginitcolors();
- {
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RX_UTF8(rx),
- dsv, RX_PRECOMP(rx), RX_PRELEN(rx), 60);
- PerlIO_printf(Perl_debug_log,"%sFreeing REx:%s %s\n",
- PL_colors[4],PL_colors[5],s);
- }
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets)
- Safefree(ri->u.offsets); /* 20010421 MJD */
-#endif
- if (ri->data) {
- int n = ri->data->count;
- PAD* new_comppad = NULL;
- PAD* old_comppad;
- PADOFFSET refcnt;
-
- while (--n >= 0) {
- /* If you add a ->what type here, update the comment in regcomp.h */
- switch (ri->data->what[n]) {
- case 's':
- case 'S':
- case 'u':
- SvREFCNT_dec(MUTABLE_SV(ri->data->data[n]));
- break;
- case 'f':
- Safefree(ri->data->data[n]);
- break;
- case 'p':
- new_comppad = MUTABLE_AV(ri->data->data[n]);
- break;
- case 'o':
- if (new_comppad == NULL)
- Perl_croak(aTHX_ "panic: pregfree comppad");
- PAD_SAVE_LOCAL(old_comppad,
- /* Watch out for global destruction's random ordering. */
- (SvTYPE(new_comppad) == SVt_PVAV) ? new_comppad : NULL
- );
- OP_REFCNT_LOCK;
- refcnt = OpREFCNT_dec((OP_4tree*)ri->data->data[n]);
- OP_REFCNT_UNLOCK;
- if (!refcnt)
- op_free((OP_4tree*)ri->data->data[n]);
-
- PAD_RESTORE_LOCAL(old_comppad);
- SvREFCNT_dec(MUTABLE_SV(new_comppad));
- new_comppad = NULL;
- break;
- case 'n':
- break;
- case 'T':
- { /* Aho Corasick add-on structure for a trie node.
- Used in stclass optimization only */
- U32 refcount;
- reg_ac_data *aho=(reg_ac_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --aho->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(aho->states);
- PerlMemShared_free(aho->fail);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- PerlMemShared_free(ri->regstclass);
- }
- }
- break;
- case 't':
- {
- /* trie structure. */
- U32 refcount;
- reg_trie_data *trie=(reg_trie_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --trie->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(trie->charmap);
- PerlMemShared_free(trie->states);
- PerlMemShared_free(trie->trans);
- if (trie->bitmap)
- PerlMemShared_free(trie->bitmap);
- if (trie->wordlen)
- PerlMemShared_free(trie->wordlen);
- if (trie->jump)
- PerlMemShared_free(trie->jump);
- if (trie->nextword)
- PerlMemShared_free(trie->nextword);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- }
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: regfree data code '%c'", ri->data->what[n]);
- }
- }
- Safefree(ri->data->what);
- Safefree(ri->data);
- }
-
- Safefree(ri);
-}
-
-#define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
-#define av_dup_inc(s,t) MUTABLE_AV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define hv_dup_inc(s,t) MUTABLE_HV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define SAVEPVN(p,n) ((p) ? savepvn(p,n) : NULL)
-
-/*
- re_dup - duplicate a regexp.
-
- This routine is expected to clone a given regexp structure. It is only
- compiled under USE_ITHREADS.
-
- After all of the core data stored in struct regexp is duplicated
- the regexp_engine.dupe method is used to copy any private data
- stored in the *pprivate pointer. This allows extensions to handle
- any duplication it needs to do.
-
- See pregfree() and regfree_internal() if you change anything here.
-*/
-#if defined(USE_ITHREADS)
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_re_dup_guts(pTHX_ const REGEXP *sstr, REGEXP *dstr, CLONE_PARAMS *param)
-{
- dVAR;
- I32 npar;
- const struct regexp *r = (const struct regexp *)SvANY(sstr);
- struct regexp *ret = (struct regexp *)SvANY(dstr);
-
- PERL_ARGS_ASSERT_RE_DUP_GUTS;
-
- npar = r->nparens+1;
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if(ret->swap) {
- /* no need to copy these */
- Newx(ret->swap, npar, regexp_paren_pair);
- }
-
- if (ret->substrs) {
- /* Do it this way to avoid reading from *r after the StructCopy().
- That way, if any of the sv_dup_inc()s dislodge *r from the L1
- cache, it doesn't matter. */
- const bool anchored = r->check_substr
- ? r->check_substr == r->anchored_substr
- : r->check_utf8 == r->anchored_utf8;
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- ret->anchored_substr = sv_dup_inc(ret->anchored_substr, param);
- ret->anchored_utf8 = sv_dup_inc(ret->anchored_utf8, param);
- ret->float_substr = sv_dup_inc(ret->float_substr, param);
- ret->float_utf8 = sv_dup_inc(ret->float_utf8, param);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
-
- if (ret->check_substr) {
- if (anchored) {
- assert(r->check_utf8 == r->anchored_utf8);
- ret->check_substr = ret->anchored_substr;
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- assert(r->check_substr == r->float_substr);
- assert(r->check_utf8 == r->float_utf8);
- ret->check_substr = ret->float_substr;
- ret->check_utf8 = ret->float_utf8;
- }
- } else if (ret->check_utf8) {
- if (anchored) {
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- ret->check_utf8 = ret->float_utf8;
- }
- }
- }
-
- RXp_PAREN_NAMES(ret) = hv_dup_inc(RXp_PAREN_NAMES(ret), param);
-
- if (ret->pprivate)
- RXi_SET(ret,CALLREGDUPE_PVT(dstr,param));
-
- if (RX_MATCH_COPIED(dstr))
- ret->subbeg = SAVEPVN(ret->subbeg, ret->sublen);
- else
- ret->subbeg = NULL;
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
-
- ret->mother_re = NULL;
- ret->gofs = 0;
-}
-#endif /* PERL_IN_XSUB_RE */
-
-/*
- regdupe_internal()
-
- This is the internal complement to regdupe() which is used to copy
- the structure pointed to by the *pprivate pointer in the regexp.
- This is the core version of the extension overridable cloning hook.
- The regexp structure being duplicated will be copied by perl prior
- to this and will be provided as the regexp *r argument, however
- with the /old/ structures pprivate pointer value. Thus this routine
- may override any copying normally done by perl.
-
- It returns a pointer to the new regexp_internal structure.
-*/
-
-void *
-Perl_regdupe_internal(pTHX_ REGEXP * const rx, CLONE_PARAMS *param)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- regexp_internal *reti;
- int len, npar;
- RXi_GET_DECL(r,ri);
-
- PERL_ARGS_ASSERT_REGDUPE_INTERNAL;
-
- npar = r->nparens+1;
- len = ProgLen(ri);
-
- Newxc(reti, sizeof(regexp_internal) + len*sizeof(regnode), char, regexp_internal);
- Copy(ri->program, reti->program, len+1, regnode);
-
-
- reti->regstclass = NULL;
-
- if (ri->data) {
- struct reg_data *d;
- const int count = ri->data->count;
- int i;
-
- Newxc(d, sizeof(struct reg_data) + count*sizeof(void *),
- char, struct reg_data);
- Newx(d->what, count, U8);
-
- d->count = count;
- for (i = 0; i < count; i++) {
- d->what[i] = ri->data->what[i];
- switch (d->what[i]) {
- /* legal options are one of: sSfpontTu
- see also regcomp.h and pregfree() */
- case 's':
- case 'S':
- case 'p': /* actually an AV, but the dup function is identical. */
- case 'u': /* actually an HV, but the dup function is identical. */
- d->data[i] = sv_dup_inc((const SV *)ri->data->data[i], param);
- break;
- case 'f':
- /* This is cheating. */
- Newx(d->data[i], 1, struct regnode_charclass_class);
- StructCopy(ri->data->data[i], d->data[i],
- struct regnode_charclass_class);
- reti->regstclass = (regnode*)d->data[i];
- break;
- case 'o':
- /* Compiled op trees are readonly and in shared memory,
- and can thus be shared without duplication. */
- OP_REFCNT_LOCK;
- d->data[i] = (void*)OpREFCNT_inc((OP*)ri->data->data[i]);
- OP_REFCNT_UNLOCK;
- break;
- case 'T':
- /* Trie stclasses are readonly and can thus be shared
- * without duplication. We free the stclass in pregfree
- * when the corresponding reg_ac_data struct is freed.
- */
- reti->regstclass= ri->regstclass;
- /* Fall through */
- case 't':
- OP_REFCNT_LOCK;
- ((reg_trie_data*)ri->data->data[i])->refcount++;
- OP_REFCNT_UNLOCK;
- /* Fall through */
- case 'n':
- d->data[i] = ri->data->data[i];
- break;
- default:
- Perl_croak(aTHX_ "panic: re_dup unknown data code '%c'", ri->data->what[i]);
- }
- }
-
- reti->data = d;
- }
- else
- reti->data = NULL;
-
- reti->name_list_idx = ri->name_list_idx;
-
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets) {
- Newx(reti->u.offsets, 2*len+1, U32);
- Copy(ri->u.offsets, reti->u.offsets, 2*len+1, U32);
- }
-#else
- SetProgLen(reti,len);
-#endif
-
- return (void*)reti;
-}
-
-#endif /* USE_ITHREADS */
-
-#ifndef PERL_IN_XSUB_RE
-
-/*
- - regnext - dig the "next" pointer out of a node
- */
-regnode *
-Perl_regnext(pTHX_ register regnode *p)
-{
- dVAR;
- register I32 offset;
-
- if (!p)
- return(NULL);
-
- offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p));
- if (offset == 0)
- return(NULL);
-
- return(p+offset);
-}
-#endif
-
-STATIC void
-S_re_croak2(pTHX_ const char* pat1,const char* pat2,...)
-{
- va_list args;
- STRLEN l1 = strlen(pat1);
- STRLEN l2 = strlen(pat2);
- char buf[512];
- SV *msv;
- const char *message;
-
- PERL_ARGS_ASSERT_RE_CROAK2;
-
- if (l1 > 510)
- l1 = 510;
- if (l1 + l2 > 510)
- l2 = 510 - l1;
- Copy(pat1, buf, l1 , char);
- Copy(pat2, buf + l1, l2 , char);
- buf[l1 + l2] = '\n';
- buf[l1 + l2 + 1] = '\0';
-#ifdef I_STDARG
- /* ANSI variant takes additional second argument */
- va_start(args, pat2);
-#else
- va_start(args);
-#endif
- msv = vmess(buf, &args);
- va_end(args);
- message = SvPV_const(msv,l1);
- if (l1 > 512)
- l1 = 512;
- Copy(message, buf, l1 , char);
- buf[l1-1] = '\0'; /* Overwrite \n */
- Perl_croak(aTHX_ "%s", buf);
-}
-
-/* XXX Here's a total kludge. But we need to re-enter for swash routines. */
-
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_save_re_context(pTHX)
-{
- dVAR;
-
- struct re_save_state *state;
-
- SAVEVPTR(PL_curcop);
- SSGROW(SAVESTACK_ALLOC_FOR_RE_SAVE_STATE + 1);
-
- state = (struct re_save_state *)(PL_savestack + PL_savestack_ix);
- PL_savestack_ix += SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
- SSPUSHINT(SAVEt_RE_STATE);
-
- Copy(&PL_reg_state, state, 1, struct re_save_state);
-
- PL_reg_start_tmp = 0;
- PL_reg_start_tmpl = 0;
- PL_reg_oldsaved = NULL;
- PL_reg_oldsavedlen = 0;
- PL_reg_maxiter = 0;
- PL_reg_leftiter = 0;
- PL_reg_poscache = NULL;
- PL_reg_poscache_size = 0;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = NULL;
-#endif
-
- /* Save $1..$n (#18107: UTF-8 s/(\w+)/uc($1)/e); AMS 20021106. */
- if (PL_curpm) {
- const REGEXP * const rx = PM_GETRE(PL_curpm);
- if (rx) {
- U32 i;
- for (i = 1; i <= RX_NPARENS(rx); i++) {
- char digits[TYPE_CHARS(long)];
- const STRLEN len = my_snprintf(digits, sizeof(digits), "%lu", (long)i);
- GV *const *const gvp
- = (GV**)hv_fetch(PL_defstash, digits, len, 0);
-
- if (gvp) {
- GV * const gv = *gvp;
- if (SvTYPE(gv) == SVt_PVGV && GvSV(gv))
- save_scalar(gv);
- }
- }
- }
- }
-}
-#endif
-
-static void
-clear_re(pTHX_ void *r)
-{
- dVAR;
- ReREFCNT_dec((REGEXP *)r);
-}
-
-#ifdef DEBUGGING
-
-STATIC void
-S_put_byte(pTHX_ SV *sv, int c)
-{
- PERL_ARGS_ASSERT_PUT_BYTE;
-
- /* Our definition of isPRINT() ignores locales, so only bytes that are
- not part of UTF-8 are considered printable. I assume that the same
- holds for UTF-EBCDIC.
- Also, code point 255 is not printable in either (it's E0 in EBCDIC,
- which Wikipedia says:
-
- EO, or Eight Ones, is an 8-bit EBCDIC character code represented as all
- ones (binary 1111 1111, hexadecimal FF). It is similar, but not
- identical, to the ASCII delete (DEL) or rubout control character.
- ) So the old condition can be simplified to !isPRINT(c) */
- if (!isPRINT(c))
- Perl_sv_catpvf(aTHX_ sv, "\\%o", c);
- else {
- const char string = c;
- if (c == '-' || c == ']' || c == '\\' || c == '^')
- sv_catpvs(sv, "\\");
- sv_catpvn(sv, &string, 1);
- }
-}
-
-
-#define CLEAR_OPTSTART \
- if (optstart) STMT_START { \
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log, " (%"IVdf" nodes)\n", (IV)(node - optstart))); \
- optstart=NULL; \
- } STMT_END
-
-#define DUMPUNTIL(b,e) CLEAR_OPTSTART; node=dumpuntil(r,start,(b),(e),last,sv,indent+1,depth+1);
-
-STATIC const regnode *
-S_dumpuntil(pTHX_ const regexp *r, const regnode *start, const regnode *node,
- const regnode *last, const regnode *plast,
- SV* sv, I32 indent, U32 depth)
-{
- dVAR;
- register U8 op = PSEUDO; /* Arbitrary non-END op. */
- register const regnode *next;
- const regnode *optstart= NULL;
-
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMPUNTIL;
-
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d : %d - %d - %d\n",indent,node-start,
- last ? last-start : 0,plast ? plast-start : 0);
-#endif
-
- if (plast && plast < last)
- last= plast;
-
- while (PL_regkind[op] != END && (!last || node < last)) {
- /* While that wasn't END last time... */
- NODE_ALIGN(node);
- op = OP(node);
- if (op == CLOSE || op == WHILEM)
- indent--;
- next = regnext((regnode *)node);
-
- /* Where, what. */
- if (OP(node) == OPTIMIZED) {
- if (!optstart && RE_DEBUG_FLAG(RE_DEBUG_COMPILE_OPTIMISE))
- optstart = node;
- else
- goto after_print;
- } else
- CLEAR_OPTSTART;
-
- regprop(r, sv, node);
- PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start),
- (int)(2*indent + 1), "", SvPVX_const(sv));
-
- if (OP(node) != OPTIMIZED) {
- if (next == NULL) /* Next ptr. */
- PerlIO_printf(Perl_debug_log, " (0)");
- else if (PL_regkind[(U8)op] == BRANCH && PL_regkind[OP(next)] != BRANCH )
- PerlIO_printf(Perl_debug_log, " (FAIL)");
- else
- PerlIO_printf(Perl_debug_log, " (%"IVdf")", (IV)(next - start));
- (void)PerlIO_putc(Perl_debug_log, '\n');
- }
-
- after_print:
- if (PL_regkind[(U8)op] == BRANCHJ) {
- assert(next);
- {
- register const regnode *nnode = (OP(next) == LONGJMP
- ? regnext((regnode *)next)
- : next);
- if (last && nnode > last)
- nnode = last;
- DUMPUNTIL(NEXTOPER(NEXTOPER(node)), nnode);
- }
- }
- else if (PL_regkind[(U8)op] == BRANCH) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node), next);
- }
- else if ( PL_regkind[(U8)op] == TRIE ) {
- const regnode *this_trie = node;
- const char op = OP(node);
- const U32 n = ARG(node);
- const reg_ac_data * const ac = op>=AHOCORASICK ?
- (reg_ac_data *)ri->data->data[n] :
- NULL;
- const reg_trie_data * const trie =
- (reg_trie_data*)ri->data->data[op<AHOCORASICK ? n : ac->trie];
-#ifdef DEBUGGING
- AV *const trie_words = MUTABLE_AV(ri->data->data[n + TRIE_WORDS_OFFSET]);
-#endif
- const regnode *nextbranch= NULL;
- I32 word_idx;
- sv_setpvs(sv, "");
- for (word_idx= 0; word_idx < (I32)trie->wordcount; word_idx++) {
- SV ** const elem_ptr = av_fetch(trie_words,word_idx,0);
-
- PerlIO_printf(Perl_debug_log, "%*s%s ",
- (int)(2*(indent+3)), "",
- elem_ptr ? pv_pretty(sv, SvPV_nolen_const(*elem_ptr), SvCUR(*elem_ptr), 60,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*elem_ptr) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT
- )
- : "???"
- );
- if (trie->jump) {
- U16 dist= trie->jump[word_idx+1];
- PerlIO_printf(Perl_debug_log, "(%"UVuf")\n",
- (UV)((dist ? this_trie + dist : next) - start));
- if (dist) {
- if (!nextbranch)
- nextbranch= this_trie + trie->jump[0];
- DUMPUNTIL(this_trie + dist, nextbranch);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode *)nextbranch);
- } else {
- PerlIO_printf(Perl_debug_log, "\n");
- }
- }
- if (last && next > last)
- node= last;
- else
- node= next;
- }
- else if ( op == CURLY ) { /* "next" might be very big: optimizer */
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS,
- NEXTOPER(node) + EXTRA_STEP_2ARGS + 1);
- }
- else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, next);
- }
- else if ( op == PLUS || op == STAR) {
- DUMPUNTIL(NEXTOPER(node), NEXTOPER(node) + 1);
- }
- else if (op == ANYOF) {
- /* arglen 1 + class block */
- node += 1 + ((ANYOF_FLAGS(node) & ANYOF_LARGE)
- ? ANYOF_CLASS_SKIP : ANYOF_SKIP);
- node = NEXTOPER(node);
- }
- else if (PL_regkind[(U8)op] == EXACT) {
- /* Literal string, where present. */
- node += NODE_SZ_STR(node) - 1;
- node = NEXTOPER(node);
- }
- else {
- node = NEXTOPER(node);
- node += regarglen[(U8)op];
- }
- if (op == CURLYX || op == OPEN)
- indent++;
- }
- CLEAR_OPTSTART;
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d\n", (int)indent);
-#endif
- return node;
-}
-
-#endif /* DEBUGGING */
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regexec.c
- */
-
-/*
- * One Ring to rule them all, One Ring to find them
- &
- * [p.v of _The Lord of the Rings_, opening poem]
- * [p.50 of _The Lord of the Rings_, I/iii: "The Shadow of the Past"]
- * [p.254 of _The Lord of the Rings_, II/ii: "The Council of Elrond"]
- */
-
-/* This file contains functions for executing a regular expression. See
- * also regcomp.c which funnily enough, contains functions for compiling
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_exec.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGEXEC_C
-#include "perl.h"
-
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#define RF_tainted 1 /* tainted information used? */
-#define RF_warned 2 /* warned about big count? */
-
-#define RF_utf8 8 /* Pattern contains multibyte chars? */
-
-#define UTF ((PL_reg_flags & RF_utf8) != 0)
-
-#define RS_init 1 /* eval environment created */
-#define RS_set 2 /* replsv value is set */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-#define REGINCLASS(prog,p,c) (ANYOF_FLAGS(p) ? reginclass(prog,p,c,0,0) : ANYOF_BITMAP_TEST(p,*(c)))
-
-/*
- * Forwards.
- */
-
-#define CHR_SVLEN(sv) (do_utf8 ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (PL_reg_match_utf8 ? utf8_distance(a,b) : a - b)
-
-#define HOPc(pos,off) \
- (char *)(PL_reg_match_utf8 \
- ? reghop3((U8*)pos, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)) \
- : (U8*)(pos + off))
-#define HOPBACKc(pos, off) \
- (char*)(PL_reg_match_utf8\
- ? reghopmaybe3((U8*)pos, -off, (U8*)PL_bostr) \
- : (pos - off >= PL_bostr) \
- ? (U8*)pos - off \
- : NULL)
-
-#define HOP3(pos,off,lim) (PL_reg_match_utf8 ? reghop3((U8*)(pos), off, (U8*)(lim)) : (U8*)(pos + off))
-#define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim))
-
-#define LOAD_UTF8_CHARCLASS(class,str) STMT_START { \
- if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)str); assert(ok); LEAVE; } } STMT_END
-#define LOAD_UTF8_CHARCLASS_ALNUM() LOAD_UTF8_CHARCLASS(alnum,"a")
-#define LOAD_UTF8_CHARCLASS_DIGIT() LOAD_UTF8_CHARCLASS(digit,"0")
-#define LOAD_UTF8_CHARCLASS_SPACE() LOAD_UTF8_CHARCLASS(space," ")
-#define LOAD_UTF8_CHARCLASS_MARK() LOAD_UTF8_CHARCLASS(mark, "\xcd\x86")
-
-/* TODO: Combine JUMPABLE and HAS_TEXT to cache OP(rn) */
-
-/* for use after a quantifier and before an EXACT-like node -- japhy */
-/* it would be nice to rework regcomp.sym to generate this stuff. sigh */
-#define JUMPABLE(rn) ( \
- OP(rn) == OPEN || \
- (OP(rn) == CLOSE && (!cur_eval || cur_eval->u.eval.close_paren != ARG(rn))) || \
- OP(rn) == EVAL || \
- OP(rn) == SUSPEND || OP(rn) == IFMATCH || \
- OP(rn) == PLUS || OP(rn) == MINMOD || \
- OP(rn) == KEEPS || (PL_regkind[OP(rn)] == VERB) || \
- (PL_regkind[OP(rn)] == CURLY && ARG1(rn) > 0) \
-)
-#define IS_EXACT(rn) (PL_regkind[OP(rn)] == EXACT)
-
-#define HAS_TEXT(rn) ( IS_EXACT(rn) || PL_regkind[OP(rn)] == REF )
-
-#if 0
-/* Currently these are only used when PL_regkind[OP(rn)] == EXACT so
- we don't need this definition. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT || OP(rn)==REF || OP(rn)==NREF )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF || OP(rn)==REFF || OP(rn)==NREFF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL || OP(rn)==REFFL || OP(rn)==NREFFL )
-
-#else
-/* ... so we use this as its faster. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL )
-
-#endif
-
-/*
- Search for mandatory following text node; for lookahead, the text must
- follow but for lookbehind (rn->flags != 0) we skip to the next step.
-*/
-#define FIND_NEXT_IMPT(rn) STMT_START { \
- while (JUMPABLE(rn)) { \
- const OPCODE type = OP(rn); \
- if (type == SUSPEND || PL_regkind[type] == CURLY) \
- rn = NEXTOPER(NEXTOPER(rn)); \
- else if (type == PLUS) \
- rn = NEXTOPER(rn); \
- else if (type == IFMATCH) \
- rn = (rn->flags == 0) ? NEXTOPER(NEXTOPER(rn)) : rn + ARG(rn); \
- else rn += NEXT_OFF(rn); \
- } \
-} STMT_END
-
-
-static void restore_pos(pTHX_ void *arg);
-
-STATIC CHECKPOINT
-S_regcppush(pTHX_ I32 parenfloor)
-{
- dVAR;
- const int retval = PL_savestack_ix;
-#define REGCP_PAREN_ELEMS 4
- const int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS;
- int p;
- GET_RE_DEBUG_FLAGS_DECL;
-
- if (paren_elems_to_push < 0)
- Perl_croak(aTHX_ "panic: paren_elems_to_push < 0");
-
-#define REGCP_OTHER_ELEMS 7
- SSGROW(paren_elems_to_push + REGCP_OTHER_ELEMS);
-
- for (p = PL_regsize; p > parenfloor; p--) {
-/* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */
- SSPUSHINT(PL_regoffs[p].end);
- SSPUSHINT(PL_regoffs[p].start);
- SSPUSHPTR(PL_reg_start_tmp[p]);
- SSPUSHINT(p);
- DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log,
- " saving \\%"UVuf" %"IVdf"(%"IVdf")..%"IVdf"\n",
- (UV)p, (IV)PL_regoffs[p].start,
- (IV)(PL_reg_start_tmp[p] - PL_bostr),
- (IV)PL_regoffs[p].end
- ));
- }
-/* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */
- SSPUSHPTR(PL_regoffs);
- SSPUSHINT(PL_regsize);
- SSPUSHINT(*PL_reglastparen);
- SSPUSHINT(*PL_reglastcloseparen);
- SSPUSHPTR(PL_reginput);
-#define REGCP_FRAME_ELEMS 2
-/* REGCP_FRAME_ELEMS are part of the REGCP_OTHER_ELEMS and
- * are needed for the regexp context stack bookkeeping. */
- SSPUSHINT(paren_elems_to_push + REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- SSPUSHINT(SAVEt_REGCONTEXT); /* Magic cookie. */
-
- return retval;
-}
-
-/* These are needed since we do not localize EVAL nodes: */
-#define REGCP_SET(cp) \
- DEBUG_STATE_r( \
- PerlIO_printf(Perl_debug_log, \
- " Setting an EVAL scope, savestack=%"IVdf"\n", \
- (IV)PL_savestack_ix)); \
- cp = PL_savestack_ix
-
-#define REGCP_UNWIND(cp) \
- DEBUG_STATE_r( \
- if (cp != PL_savestack_ix) \
- PerlIO_printf(Perl_debug_log, \
- " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \
- (IV)(cp), (IV)PL_savestack_ix)); \
- regcpblow(cp)
-
-STATIC char *
-S_regcppop(pTHX_ const regexp *rex)
-{
- dVAR;
- U32 i;
- char *input;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCPPOP;
-
- /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */
- i = SSPOPINT;
- assert(i == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */
- i = SSPOPINT; /* Parentheses elements to pop. */
- input = (char *) SSPOPPTR;
- *PL_reglastcloseparen = SSPOPINT;
- *PL_reglastparen = SSPOPINT;
- PL_regsize = SSPOPINT;
- PL_regoffs=(regexp_paren_pair *) SSPOPPTR;
-
-
- /* Now restore the parentheses context. */
- for (i -= (REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- i > 0; i -= REGCP_PAREN_ELEMS) {
- I32 tmps;
- U32 paren = (U32)SSPOPINT;
- PL_reg_start_tmp[paren] = (char *) SSPOPPTR;
- PL_regoffs[paren].start = SSPOPINT;
- tmps = SSPOPINT;
- if (paren <= *PL_reglastparen)
- PL_regoffs[paren].end = tmps;
- DEBUG_BUFFERS_r(
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n",
- (UV)paren, (IV)PL_regoffs[paren].start,
- (IV)(PL_reg_start_tmp[paren] - PL_bostr),
- (IV)PL_regoffs[paren].end,
- (paren > *PL_reglastparen ? "(no)" : ""));
- );
- }
- DEBUG_BUFFERS_r(
- if (*PL_reglastparen + 1 <= rex->nparens) {
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"IVdf"..\\%"IVdf" to undef\n",
- (IV)(*PL_reglastparen + 1), (IV)rex->nparens);
- }
- );
-#if 1
- /* It would seem that the similar code in regtry()
- * already takes care of this, and in fact it is in
- * a better location to since this code can #if 0-ed out
- * but the code in regtry() is needed or otherwise tests
- * requiring null fields (pat.t#187 and split.t#{13,14}
- * (as of patchlevel 7877) will fail. Then again,
- * this code seems to be necessary or otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * --jhi updated by dapm */
- for (i = *PL_reglastparen + 1; i <= rex->nparens; i++) {
- if (i > PL_regsize)
- PL_regoffs[i].start = -1;
- PL_regoffs[i].end = -1;
- }
-#endif
- return input;
-}
-
-#define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */
-
-/*
- * pregexec and friends
- */
-
-#ifndef PERL_IN_XSUB_RE
-/*
- - pregexec - match a regexp against a string
- */
-I32
-Perl_pregexec(pTHX_ REGEXP * const prog, char* stringarg, register char *strend,
- char *strbeg, I32 minend, SV *screamer, U32 nosave)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* nosave: For optimizations. */
-{
- PERL_ARGS_ASSERT_PREGEXEC;
-
- return
- regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL,
- nosave ? 0 : REXEC_COPY_STR);
-}
-#endif
-
-/*
- * Need to implement the following flags for reg_anch:
- *
- * USE_INTUIT_NOML - Useful to call re_intuit_start() first
- * USE_INTUIT_ML
- * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer
- * INTUIT_AUTORITATIVE_ML
- * INTUIT_ONCE_NOML - Intuit can match in one location only.
- * INTUIT_ONCE_ML
- *
- * Another flag for this function: SECOND_TIME (so that float substrs
- * with giant delta may be not rechecked).
- */
-
-/* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */
-
-/* If SCREAM, then SvPVX_const(sv) should be compatible with strpos and strend.
- Otherwise, only SvCUR(sv) is used to get strbeg. */
-
-/* XXXX We assume that strpos is strbeg unless sv. */
-
-/* XXXX Some places assume that there is a fixed substring.
- An update may be needed if optimizer marks as "INTUITable"
- RExen without fixed substrings. Similarly, it is assumed that
- lengths of all the strings are no more than minlen, thus they
- cannot come from lookahead.
- (Or minlen should take into account lookahead.)
- NOTE: Some of this comment is not correct. minlen does now take account
- of lookahead/behind. Further research is required. -- demerphq
-
-*/
-
-/* A failure to find a constant substring means that there is no need to make
- an expensive call to REx engine, thus we celebrate a failure. Similarly,
- finding a substring too deep into the string means that less calls to
- regtry() should be needed.
-
- REx compiler's optimizer found 4 possible hints:
- a) Anchored substring;
- b) Fixed substring;
- c) Whether we are anchored (beginning-of-line or \G);
- d) First node (of those at offset 0) which may distingush positions;
- We use a)b)d) and multiline-part of c), and try to find a position in the
- string which does not contradict any of them.
- */
-
-/* Most of decisions we do here should have been done at compile time.
- The nodes of the REx which we used for the search should have been
- deleted from the finite automaton. */
-
-char *
-Perl_re_intuit_start(pTHX_ REGEXP * const rx, SV *sv, char *strpos,
- char *strend, const U32 flags, re_scream_pos_data *data)
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- register I32 start_shift = 0;
- /* Should be nonnegative! */
- register I32 end_shift = 0;
- register char *s;
- register SV *check;
- char *strbeg;
- char *t;
- const bool do_utf8 = (sv && SvUTF8(sv)) ? 1 : 0; /* if no sv we have to assume bytes */
- I32 ml_anch;
- register char *other_last = NULL; /* other substr checked before this */
- char *check_at = NULL; /* check substr found at this pos */
- const I32 multiline = prog->extflags & RXf_PMf_MULTILINE;
- RXi_GET_DECL(prog,progi);
-#ifdef DEBUGGING
- const char * const i_strpos = strpos;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_START;
-
- RX_MATCH_UTF8_set(rx,do_utf8);
-
- if (RX_UTF8(rx)) {
- PL_reg_flags |= RF_utf8;
- }
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, strpos, strend,
- sv ? "Guessing start of match in sv for"
- : "Guessing start of match in string for");
- );
-
- /* CHR_DIST() would be more correct here but it makes things slow. */
- if (prog->minlen > strend - strpos) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short... [re_intuit_start]\n"));
- goto fail;
- }
-
- strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos;
- PL_regeol = strend;
- if (do_utf8) {
- if (!prog->check_utf8 && prog->check_substr)
- to_utf8_substr(prog);
- check = prog->check_utf8;
- } else {
- if (!prog->check_substr && prog->check_utf8)
- to_byte_substr(prog);
- check = prog->check_substr;
- }
- if (check == &PL_sv_undef) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Non-utf8 string cannot match utf8 check string\n"));
- goto fail;
- }
- if (prog->extflags & RXf_ANCH) { /* Match at beg-of-str or after \n */
- ml_anch = !( (prog->extflags & RXf_ANCH_SINGLE)
- || ( (prog->extflags & RXf_ANCH_BOL)
- && !multiline ) ); /* Check after \n? */
-
- if (!ml_anch) {
- if ( !(prog->extflags & RXf_ANCH_GPOS) /* Checked by the caller */
- && !(prog->intflags & PREGf_IMPLICIT) /* not a real BOL */
- /* SvCUR is not set on references: SvRV and SvPVX_const overlap */
- && sv && !SvROK(sv)
- && (strpos != strbeg)) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not at start...\n"));
- goto fail;
- }
- if (prog->check_offset_min == prog->check_offset_max &&
- !(prog->extflags & RXf_CANY_SEEN)) {
- /* Substring at constant offset from beg-of-str... */
- I32 slen;
-
- s = HOP3c(strpos, prog->check_offset_min, strend);
-
- if (SvTAIL(check)) {
- slen = SvCUR(check); /* >= 1 */
-
- if ( strend - s > slen || strend - s < slen - 1
- || (strend - s == slen && strend[-1] != '\n')) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String too long...\n"));
- goto fail_finish;
- }
- /* Now should match s[0..slen-2] */
- slen--;
- if (slen && (*SvPVX_const(check) != *s
- || (slen > 1
- && memNE(SvPVX_const(check), s, slen)))) {
- report_neq:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String not equal...\n"));
- goto fail_finish;
- }
- }
- else if (*SvPVX_const(check) != *s
- || ((slen = SvCUR(check)) > 1
- && memNE(SvPVX_const(check), s, slen)))
- goto report_neq;
- check_at = s;
- goto success_at_start;
- }
- }
- /* Match is anchored, but substr is not anchored wrt beg-of-str. */
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- if (!ml_anch) {
- const I32 end = prog->check_offset_max + CHR_SVLEN(check)
- - (SvTAIL(check) != 0);
- const I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end;
-
- if (end_shift < eshift)
- end_shift = eshift;
- }
- }
- else { /* Can match at random position */
- ml_anch = 0;
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- /* end shift should be non negative here */
- }
-
-#ifdef QDEBUGGING /* 7/99: reports of failure (with the older version) */
- if (end_shift < 0)
- Perl_croak(aTHX_ "panic: end_shift: %"IVdf" pattern:\n%s\n ",
- (IV)end_shift, RX_PRECOMP(prog));
-#endif
-
- restart:
- /* Find a possible match in the region s..strend by looking for
- the "check" substring in the region corrected by start/end_shift. */
-
- {
- I32 srch_start_shift = start_shift;
- I32 srch_end_shift = end_shift;
- if (srch_start_shift < 0 && strbeg - s > srch_start_shift) {
- srch_end_shift -= ((strbeg - s) - srch_start_shift);
- srch_start_shift = strbeg - s;
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "Check offset min: %"IVdf" Start shift: %"IVdf" End shift %"IVdf" Real End Shift: %"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)srch_start_shift,
- (IV)srch_end_shift,
- (IV)prog->check_end_shift);
- });
-
- if (flags & REXEC_SCREAM) {
- I32 p = -1; /* Internal iterator of scream. */
- I32 * const pp = data ? data->scream_pos : &p;
-
- if (PL_screamfirst[BmRARE(check)] >= 0
- || ( BmRARE(check) == '\n'
- && (BmPREVIOUS(check) == SvCUR(check) - 1)
- && SvTAIL(check) ))
- s = screaminstr(sv, check,
- srch_start_shift + (s - strbeg), srch_end_shift, pp, 0);
- else
- goto fail_finish;
- /* we may be pointing at the wrong string */
- if (s && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- if (data)
- *data->scream_olds = s;
- }
- else {
- U8* start_point;
- U8* end_point;
- if (prog->extflags & RXf_CANY_SEEN) {
- start_point= (U8*)(s + srch_start_shift);
- end_point= (U8*)(strend - srch_end_shift);
- } else {
- start_point= HOP3(s, srch_start_shift, srch_start_shift < 0 ? strbeg : strend);
- end_point= HOP3(strend, -srch_end_shift, strbeg);
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "fbm_instr len=%d str=<%.*s>\n",
- (int)(end_point - start_point),
- (int)(end_point - start_point) > 20 ? 20 : (int)(end_point - start_point),
- start_point);
- });
-
- s = fbm_instr( start_point, end_point,
- check, multiline ? FBMrf_MULTILINE : 0);
- }
- }
- /* Update the count-of-usability, remove useless subpatterns,
- unshift s. */
-
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(check), RE_SV_DUMPLEN(check), 30);
- PerlIO_printf(Perl_debug_log, "%s %s substr %s%s%s",
- (s ? "Found" : "Did not find"),
- (check == (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)
- ? "anchored" : "floating"),
- quoted,
- RE_SV_TAIL(check),
- (s ? " at offset " : "...\n") );
- });
-
- if (!s)
- goto fail_finish;
- /* Finish the diagnostic message */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) );
-
- /* XXX dmq: first branch is for positive lookbehind...
- Our check string is offset from the beginning of the pattern.
- So we need to do any stclass tests offset forward from that
- point. I think. :-(
- */
-
-
-
- check_at=s;
-
-
- /* Got a candidate. Check MBOL anchoring, and the *other* substr.
- Start with the other substr.
- XXXX no SCREAM optimization yet - and a very coarse implementation
- XXXX /ttx+/ results in anchored="ttx", floating="x". floating will
- *always* match. Probably should be marked during compile...
- Probably it is right to do no SCREAM here...
- */
-
- if (do_utf8 ? (prog->float_utf8 && prog->anchored_utf8)
- : (prog->float_substr && prog->anchored_substr))
- {
- /* Take into account the "other" substring. */
- /* XXXX May be hopelessly wrong for UTF... */
- if (!other_last)
- other_last = strpos;
- if (check == (do_utf8 ? prog->float_utf8 : prog->float_substr)) {
- do_other_anchored:
- {
- char * const last = HOP3c(s, -start_shift, strbeg);
- char *last1, *last2;
- char * const saved_s = s;
- SV* must;
-
- t = s - prog->check_offset_max;
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -(prog->check_offset_max), (U8*)strpos))
- && t > strpos)))
- NOOP;
- else
- t = strpos;
- t = HOP3c(t, prog->anchored_offset, strend);
- if (t < other_last) /* These positions already checked */
- t = other_last;
- last2 = last1 = HOP3c(strend, -prog->minlen, strbeg);
- if (last < last1)
- last1 = last;
- /* XXXX It is not documented what units *_offsets are in.
- We assume bytes, but this is clearly wrong.
- Meaning this code needs to be carefully reviewed for errors.
- dmq.
- */
-
- /* On end-of-str: see comment below. */
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->anchored_utf8); /* for debug */
- }
- else
- s = fbm_instr(
- (unsigned char*)t,
- HOP3(HOP3(last1, prog->anchored_offset, strend)
- + SvCUR(must), -(SvTAIL(must)!=0), strbeg),
- must,
- multiline ? FBMrf_MULTILINE : 0
- );
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s anchored substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
-
-
- if (!s) {
- if (last1 >= last2) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying floating at offset %ld...\n",
- (long)(HOP3c(saved_s, 1, strend) - i_strpos)));
- other_last = HOP3c(last1, prog->anchored_offset+1, strend);
- s = HOP3c(last, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- t = HOP3c(s, -prog->anchored_offset, strbeg);
- other_last = HOP3c(s, 1, strend);
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
- else { /* Take into account the floating substring. */
- char *last, *last1;
- char * const saved_s = s;
- SV* must;
-
- t = HOP3c(s, -start_shift, strbeg);
- last1 = last =
- HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg);
- if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset)
- last = HOP3c(t, prog->float_max_offset, strend);
- s = HOP3c(t, prog->float_min_offset, strend);
- if (s < other_last)
- s = other_last;
- /* XXXX It is not documented what units *_offsets are in. Assume bytes. */
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- /* fbm_instr() takes into account exact value of end-of-str
- if the check is SvTAIL(ed). Since false positives are OK,
- and end-of-str is not later than strend we are OK. */
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->float_utf8); /* for debug message */
- }
- else
- s = fbm_instr((unsigned char*)s,
- (unsigned char*)last + SvCUR(must)
- - (SvTAIL(must)!=0),
- must, multiline ? FBMrf_MULTILINE : 0);
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s floating substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
- if (!s) {
- if (last1 == last) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying anchored starting at offset %ld...\n",
- (long)(saved_s + 1 - i_strpos)));
- other_last = last;
- s = HOP3c(t, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- other_last = s; /* Fix this later. --Hugo */
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
-
-
- t= (char*)HOP3( s, -prog->check_offset_max, (prog->check_offset_max<0) ? strend : strpos);
-
- DEBUG_OPTIMISE_MORE_r(
- PerlIO_printf(Perl_debug_log,
- "Check offset min:%"IVdf" max:%"IVdf" S:%"IVdf" t:%"IVdf" D:%"IVdf" end:%"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)prog->check_offset_max,
- (IV)(s-strpos),
- (IV)(t-strpos),
- (IV)(t-s),
- (IV)(strend-strpos)
- )
- );
-
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -prog->check_offset_max, (U8*) ((prog->check_offset_max<0) ? strend : strpos)))
- && t > strpos)))
- {
- /* Fixed substring is found far enough so that the match
- cannot start at strpos. */
- try_at_offset:
- if (ml_anch && t[-1] != '\n') {
- /* Eventually fbm_*() should handle this, but often
- anchored_offset is not 0, so this check will not be wasted. */
- /* XXXX In the code below we prefer to look for "^" even in
- presence of anchored substrings. And we search even
- beyond the found float position. These pessimizations
- are historical artefacts only. */
- find_anchor:
- while (t < strend - prog->minlen) {
- if (*t == '\n') {
- if (t < check_at - prog->check_offset_min) {
- if (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) {
- /* Since we moved from the found position,
- we definitely contradict the found anchored
- substr. Due to the above check we do not
- contradict "check" substr.
- Thus we can arrive here only if check substr
- is float. Redo checking for "other"=="fixed".
- */
- strpos = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset)));
- goto do_other_anchored;
- }
- /* We don't contradict the found floating substring. */
- /* XXXX Why not check for STCLASS? */
- s = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(s - i_strpos)));
- goto set_useful;
- }
- /* Position contradicts check-string */
- /* XXXX probably better to look for check-string
- than for "\n", so one should lower the limit for t? */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t + 1 - i_strpos)));
- other_last = strpos = s = t + 1;
- goto restart;
- }
- t++;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- goto fail_finish;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- }
- s = t;
- set_useful:
- ++BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr); /* hooray/5 */
- }
- else {
- /* The found string does not prohibit matching at strpos,
- - no optimization of calling REx engine can be performed,
- unless it was an MBOL and we are not after MBOL,
- or a future STCLASS check will fail this. */
- try_at_start:
- /* Even in this situation we may use MBOL flag if strpos is offset
- wrt the start of the string. */
- if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */
- && (strpos != strbeg) && strpos[-1] != '\n'
- /* May be due to an implicit anchor of m{.*foo} */
- && !(prog->intflags & PREGf_IMPLICIT))
- {
- t = strpos;
- goto find_anchor;
- }
- DEBUG_EXECUTE_r( if (ml_anch)
- PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n",
- (long)(strpos - i_strpos), PL_colors[0], PL_colors[1]);
- );
- success_at_start:
- if (!(prog->intflags & PREGf_NAUGHTY) /* XXXX If strpos moved? */
- && (do_utf8 ? (
- prog->check_utf8 /* Could be deleted already */
- && --BmUSEFUL(prog->check_utf8) < 0
- && (prog->check_utf8 == prog->float_utf8)
- ) : (
- prog->check_substr /* Could be deleted already */
- && --BmUSEFUL(prog->check_substr) < 0
- && (prog->check_substr == prog->float_substr)
- )))
- {
- /* If flags & SOMETHING - do not do it many times on the same match */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n"));
- SvREFCNT_dec(do_utf8 ? prog->check_utf8 : prog->check_substr);
- if (do_utf8 ? prog->check_substr : prog->check_utf8)
- SvREFCNT_dec(do_utf8 ? prog->check_substr : prog->check_utf8);
- prog->check_substr = prog->check_utf8 = NULL; /* disable */
- prog->float_substr = prog->float_utf8 = NULL; /* clear */
- check = NULL; /* abort */
- s = strpos;
- /* XXXX This is a remnant of the old implementation. It
- looks wasteful, since now INTUIT can use many
- other heuristics. */
- prog->extflags &= ~RXf_USE_INTUIT;
- }
- else
- s = strpos;
- }
-
- /* Last resort... */
- /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */
- /* trie stclasses are too expensive to use here, we are better off to
- leave it to regmatch itself */
- if (progi->regstclass && PL_regkind[OP(progi->regstclass)]!=TRIE) {
- /* minlen == 0 is possible if regstclass is \b or \B,
- and the fixed substr is ''$.
- Since minlen is already taken into account, s+1 is before strend;
- accidentally, minlen >= 1 guaranties no false positives at s + 1
- even for \b or \B. But (minlen? 1 : 0) below assumes that
- regstclass does not come from lookahead... */
- /* If regstclass takes bytelength more than 1: If charlength==1, OK.
- This leaves EXACTF only, which is dealt with in find_byclass(). */
- const U8* const str = (U8*)STRING(progi->regstclass);
- const int cl_l = (PL_regkind[OP(progi->regstclass)] == EXACT
- ? CHR_DIST(str+STR_LEN(progi->regstclass), str)
- : 1);
- char * endpos;
- if (prog->anchored_substr || prog->anchored_utf8 || ml_anch)
- endpos= HOP3c(s, (prog->minlen ? cl_l : 0), strend);
- else if (prog->float_substr || prog->float_utf8)
- endpos= HOP3c(HOP3c(check_at, -start_shift, strbeg), cl_l, strend);
- else
- endpos= strend;
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %"IVdf" s: %"IVdf" endpos: %"IVdf"\n",
- (IV)start_shift, (IV)(check_at - strbeg), (IV)(s - strbeg), (IV)(endpos - strbeg)));
-
- t = s;
- s = find_byclass(prog, progi->regstclass, s, endpos, NULL);
- if (!s) {
-#ifdef DEBUGGING
- const char *what = NULL;
-#endif
- if (endpos == strend) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "This position contradicts STCLASS...\n") );
- if ((prog->extflags & RXf_ANCH) && !ml_anch)
- goto fail;
- /* Contradict one of substrings */
- if (prog->anchored_substr || prog->anchored_utf8) {
- if ((do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) == check) {
- DEBUG_EXECUTE_r( what = "anchored" );
- hop_and_restart:
- s = HOP3c(t, 1, strend);
- if (s + start_shift + end_shift > strend) {
- /* XXXX Should be taken into account earlier? */
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for %s substr starting at offset %ld...\n",
- what, (long)(s + start_shift - i_strpos)) );
- goto restart;
- }
- /* Have both, check_string is floating */
- if (t + start_shift >= check_at) /* Contradicts floating=check */
- goto retry_floating_check;
- /* Recheck anchored substring, but not floating... */
- s = check_at;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for anchored substr starting at offset %ld...\n",
- (long)(other_last - i_strpos)) );
- goto do_other_anchored;
- }
- /* Another way we could have checked stclass at the
- current position only: */
- if (ml_anch) {
- s = t = t + 1;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for /%s^%s/m starting at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t - i_strpos)) );
- goto try_at_offset;
- }
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) /* Could have been deleted */
- goto fail;
- /* Check is floating subtring. */
- retry_floating_check:
- t = check_at - start_shift;
- DEBUG_EXECUTE_r( what = "floating" );
- goto hop_and_restart;
- }
- if (t != s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "By STCLASS: moving %ld --> %ld\n",
- (long)(t - i_strpos), (long)(s - i_strpos))
- );
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Does not contradict STCLASS...\n");
- );
- }
- }
- giveup:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n",
- PL_colors[4], (check ? "Guessed" : "Giving up"),
- PL_colors[5], (long)(s - i_strpos)) );
- return s;
-
- fail_finish: /* Substring not found */
- if (prog->check_substr || prog->check_utf8) /* could be removed already */
- BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr) += 5; /* hooray */
- fail:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n",
- PL_colors[4], PL_colors[5]));
- return NULL;
-}
-
-#define DECL_TRIE_TYPE(scan) \
- const enum { trie_plain, trie_utf8, trie_utf8_fold, trie_latin_utf8_fold } \
- trie_type = (scan->flags != EXACT) \
- ? (do_utf8 ? trie_utf8_fold : (UTF ? trie_latin_utf8_fold : trie_plain)) \
- : (do_utf8 ? trie_utf8 : trie_plain)
-
-#define REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, uscan, len, \
-uvc, charid, foldlen, foldbuf, uniflags) STMT_START { \
- UV uvc_unfolded = 0; \
- switch (trie_type) { \
- case trie_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc_unfolded = uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- uvc_unfolded = uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_latin_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- len = 1; \
- uvc = to_uni_fold( *(U8*)uc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_utf8: \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- break; \
- case trie_plain: \
- uvc = (UV)*uc; \
- len = 1; \
- } \
- \
- if (uvc < 256) { \
- charid = trie->charmap[ uvc ]; \
- } \
- else { \
- charid = 0; \
- if (widecharmap) { \
- SV** const svpp = hv_fetch(widecharmap, \
- (char*)&uvc, sizeof(UV), 0); \
- if (svpp) \
- charid = (U16)SvIV(*svpp); \
- } \
- } \
- if (!charid && trie_type == trie_utf8_fold && !UTF) { \
- charid = trie->charmap[uvc_unfolded]; \
- } \
-} STMT_END
-
-#define REXEC_FBC_EXACTISH_CHECK(CoNd) \
-{ \
- char *my_strend= (char *)strend; \
- if ( (CoNd) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8, \
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- else { \
- U8 foldbuf[UTF8_MAXBYTES_CASE+1]; \
- uvchr_to_utf8(tmpbuf, c); \
- f = to_utf8_fold(tmpbuf, foldbuf, &foldlen); \
- if ( f != c \
- && (f == c1 || f == c2) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8,\
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- } \
-} \
-s += len
-
-#define REXEC_FBC_EXACTISH_SCAN(CoNd) \
-STMT_START { \
- while (s <= e) { \
- if ( (CoNd) \
- && (ln == 1 || !(OP(c) == EXACTF \
- ? ibcmp(s, m, ln) \
- : ibcmp_locale(s, m, ln))) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_SCAN(CoDe) \
-STMT_START { \
- while (s + (uskip = UTF8SKIP(s)) <= strend) { \
- CoDe \
- s += uskip; \
- } \
-} STMT_END
-
-#define REXEC_FBC_SCAN(CoDe) \
-STMT_START { \
- while (s < strend) { \
- CoDe \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_CLASS_SCAN(CoNd) \
-REXEC_FBC_UTF8_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_CLASS_SCAN(CoNd) \
-REXEC_FBC_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_TRYIT \
-if ((!reginfo || regtry(reginfo, &s))) \
- goto got_it
-
-#define REXEC_FBC_CSCAN(CoNdUtF8,CoNd) \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_PRELOAD(UtFpReLoAd,CoNdUtF8,CoNd) \
- if (do_utf8) { \
- UtFpReLoAd; \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_TAINT(CoNdUtF8,CoNd) \
- PL_reg_flags |= RF_tainted; \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define DUMP_EXEC_POS(li,s,doutf8) \
- dump_exec_pos(li,s,(PL_regeol),(PL_bostr),(PL_reg_starttry),doutf8)
-
-/* We know what class REx starts with. Try to find this position... */
-/* if reginfo is NULL, its a dryrun */
-/* annoyingly all the vars in this routine have different names from their counterparts
- in regmatch. /grrr */
-
-STATIC char *
-S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
- const char *strend, regmatch_info *reginfo)
-{
- dVAR;
- const I32 doevery = (prog->intflags & PREGf_SKIP) == 0;
- char *m;
- STRLEN ln;
- STRLEN lnc;
- register STRLEN uskip;
- unsigned int c1;
- unsigned int c2;
- char *e;
- register I32 tmp = 1; /* Scratch variable? */
- register const bool do_utf8 = PL_reg_match_utf8;
- RXi_GET_DECL(prog,progi);
-
- PERL_ARGS_ASSERT_FIND_BYCLASS;
-
- /* We know what class it must start with. */
- switch (OP(c)) {
- case ANYOF:
- if (do_utf8) {
- REXEC_FBC_UTF8_CLASS_SCAN((ANYOF_FLAGS(c) & ANYOF_UNICODE) ||
- !UTF8_IS_INVARIANT((U8)s[0]) ?
- reginclass(prog, c, (U8*)s, 0, do_utf8) :
- REGINCLASS(prog, c, (U8*)s));
- }
- else {
- while (s < strend) {
- STRLEN skip = 1;
-
- if (REGINCLASS(prog, c, (U8*)s) ||
- (ANYOF_FOLD_SHARP_S(c, s, strend) &&
- /* The assignment of 2 is intentional:
- * for the folded sharp s, the skip is 2. */
- (skip = SHARP_S_SKIP))) {
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += skip;
- }
- }
- break;
- case CANY:
- REXEC_FBC_SCAN(
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- );
- break;
- case EXACTF:
- m = STRING(c);
- ln = STR_LEN(c); /* length to match in octets/bytes */
- lnc = (I32) ln; /* length to match in characters */
- if (UTF) {
- STRLEN ulen1, ulen2;
- U8 *sm = (U8 *) m;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
- /* used by commented-out code below */
- /*const U32 uniflags = UTF8_ALLOW_DEFAULT;*/
-
- /* XXX: Since the node will be case folded at compile
- time this logic is a little odd, although im not
- sure that its actually wrong. --dmq */
-
- c1 = to_utf8_lower((U8*)m, tmpbuf1, &ulen1);
- c2 = to_utf8_upper((U8*)m, tmpbuf2, &ulen2);
-
- /* XXX: This is kinda strange. to_utf8_XYZ returns the
- codepoint of the first character in the converted
- form, yet originally we did the extra step.
- No tests fail by commenting this code out however
- so Ive left it out. -- dmq.
-
- c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- */
-
- lnc = 0;
- while (sm < ((U8 *) m + ln)) {
- lnc++;
- sm += UTF8SKIP(sm);
- }
- }
- else {
- c1 = *(U8*)m;
- c2 = PL_fold[c1];
- }
- goto do_exactf;
- case EXACTFL:
- m = STRING(c);
- ln = STR_LEN(c);
- lnc = (I32) ln;
- c1 = *(U8*)m;
- c2 = PL_fold_locale[c1];
- do_exactf:
- e = HOP3c(strend, -((I32)lnc), s);
-
- if (!reginfo && e < s)
- e = s; /* Due to minlen logic of intuit() */
-
- /* The idea in the EXACTF* cases is to first find the
- * first character of the EXACTF* node and then, if
- * necessary, case-insensitively compare the full
- * text of the node. The c1 and c2 are the first
- * characters (though in Unicode it gets a bit
- * more complicated because there are more cases
- * than just upper and lower: one needs to use
- * the so-called folding case for case-insensitive
- * matching (called "loose matching" in Unicode).
- * ibcmp_utf8() will do just that. */
-
- if (do_utf8 || UTF) {
- UV c, f;
- U8 tmpbuf [UTF8_MAXBYTES+1];
- STRLEN len = 1;
- STRLEN foldlen;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- if (c1 == c2) {
- /* Upper and lower of 1st char are equal -
- * probably not a "letter". */
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
- REXEC_FBC_EXACTISH_CHECK(c == c1);
- }
- }
- else {
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
-
- /* Handle some of the three Greek sigmas cases.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (the character class or ANYOF cases)
- * are handled during compiletime in
- * regexec.c:S_regclass(). */
- if (c == (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA ||
- c == (UV)UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA)
- c = (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA;
-
- REXEC_FBC_EXACTISH_CHECK(c == c1 || c == c2);
- }
- }
- }
- else {
- /* Neither pattern nor string are UTF8 */
- if (c1 == c2)
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1);
- else
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1 || *(U8*)s == c2);
- }
- break;
- case BOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == BOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == BOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- if ((!prog->minlen && tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NBOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == NBOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == NBOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == NBOUND ?
- isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- if ((!prog->minlen && !tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case ALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_ALNUM(),
- swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8),
- isALNUM(*s)
- );
- case ALNUML:
- REXEC_FBC_CSCAN_TAINT(
- isALNUM_LC_utf8((U8*)s),
- isALNUM_LC(*s)
- );
- case NALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_ALNUM(),
- !swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8),
- !isALNUM(*s)
- );
- case NALNUML:
- REXEC_FBC_CSCAN_TAINT(
- !isALNUM_LC_utf8((U8*)s),
- !isALNUM_LC(*s)
- );
- case SPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_SPACE(),
- *s == ' ' || swash_fetch(PL_utf8_space,(U8*)s, do_utf8),
- isSPACE(*s)
- );
- case SPACEL:
- REXEC_FBC_CSCAN_TAINT(
- *s == ' ' || isSPACE_LC_utf8((U8*)s),
- isSPACE_LC(*s)
- );
- case NSPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_SPACE(),
- !(*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s, do_utf8)),
- !isSPACE(*s)
- );
- case NSPACEL:
- REXEC_FBC_CSCAN_TAINT(
- !(*s == ' ' || isSPACE_LC_utf8((U8*)s)),
- !isSPACE_LC(*s)
- );
- case DIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_DIGIT(),
- swash_fetch(PL_utf8_digit,(U8*)s, do_utf8),
- isDIGIT(*s)
- );
- case DIGITL:
- REXEC_FBC_CSCAN_TAINT(
- isDIGIT_LC_utf8((U8*)s),
- isDIGIT_LC(*s)
- );
- case NDIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_DIGIT(),
- !swash_fetch(PL_utf8_digit,(U8*)s, do_utf8),
- !isDIGIT(*s)
- );
- case NDIGITL:
- REXEC_FBC_CSCAN_TAINT(
- !isDIGIT_LC_utf8((U8*)s),
- !isDIGIT_LC(*s)
- );
- case LNBREAK:
- REXEC_FBC_CSCAN(
- is_LNBREAK_utf8(s),
- is_LNBREAK_latin1(s)
- );
- case VERTWS:
- REXEC_FBC_CSCAN(
- is_VERTWS_utf8(s),
- is_VERTWS_latin1(s)
- );
- case NVERTWS:
- REXEC_FBC_CSCAN(
- !is_VERTWS_utf8(s),
- !is_VERTWS_latin1(s)
- );
- case HORIZWS:
- REXEC_FBC_CSCAN(
- is_HORIZWS_utf8(s),
- is_HORIZWS_latin1(s)
- );
- case NHORIZWS:
- REXEC_FBC_CSCAN(
- !is_HORIZWS_utf8(s),
- !is_HORIZWS_latin1(s)
- );
- case AHOCORASICKC:
- case AHOCORASICK:
- {
- DECL_TRIE_TYPE(c);
- /* what trie are we using right now */
- reg_ac_data *aho
- = (reg_ac_data*)progi->data->data[ ARG( c ) ];
- reg_trie_data *trie
- = (reg_trie_data*)progi->data->data[ aho->trie ];
- HV *widecharmap = MUTABLE_HV(progi->data->data[ aho->trie + 1 ]);
-
- const char *last_start = strend - trie->minlen;
-#ifdef DEBUGGING
- const char *real_start = s;
-#endif
- STRLEN maxlen = trie->maxlen;
- SV *sv_points;
- U8 **points; /* map of where we were in the input string
- when reading a given char. For ASCII this
- is unnecessary overhead as the relationship
- is always 1:1, but for Unicode, especially
- case folded Unicode this is not true. */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- U8 *bitmap=NULL;
-
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- /* We can't just allocate points here. We need to wrap it in
- * an SV so it gets freed properly if there is a croak while
- * running the match */
- ENTER;
- SAVETMPS;
- sv_points=newSV(maxlen * sizeof(U8 *));
- SvCUR_set(sv_points,
- maxlen * sizeof(U8 *));
- SvPOK_on(sv_points);
- sv_2mortal(sv_points);
- points=(U8**)SvPV_nolen(sv_points );
- if ( trie_type != trie_utf8_fold
- && (trie->bitmap || OP(c)==AHOCORASICKC) )
- {
- if (trie->bitmap)
- bitmap=(U8*)trie->bitmap;
- else
- bitmap=(U8*)ANYOF_BITMAP(c);
- }
- /* this is the Aho-Corasick algorithm modified a touch
- to include special handling for long "unknown char"
- sequences. The basic idea being that we use AC as long
- as we are dealing with a possible matching char, when
- we encounter an unknown char (and we have not encountered
- an accepting state) we scan forward until we find a legal
- starting char.
- AC matching is basically that of trie matching, except
- that when we encounter a failing transition, we fall back
- to the current states "fail state", and try the current char
- again, a process we repeat until we reach the root state,
- state 1, or a legal transition. If we fail on the root state
- then we can either terminate if we have reached an accepting
- state previously, or restart the entire process from the beginning
- if we have not.
-
- */
- while (s <= last_start) {
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- U8 *uc = (U8*)s;
- U16 charid = 0;
- U32 base = 1;
- U32 state = 1;
- UV uvc = 0;
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- U8 *leftmost = NULL;
-#ifdef DEBUGGING
- U32 accepted_word= 0;
-#endif
- U32 pointpos = 0;
-
- while ( state && uc <= (U8*)strend ) {
- int failed=0;
- U32 word = aho->states[ state ].wordnum;
-
- if( state==1 ) {
- if ( bitmap ) {
- DEBUG_TRIE_EXECUTE_r(
- if ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- dump_exec_pos( (char *)uc, c, strend, real_start,
- (char *)uc, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- " Scanning for legal start char...\n");
- }
- );
- while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- uc++;
- }
- s= (char *)uc;
- }
- if (uc >(U8*)last_start) break;
- }
-
- if ( word ) {
- U8 *lpos= points[ (pointpos - trie->wordlen[word-1] ) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=word);
- leftmost= lpos;
- }
- if (base==0) break;
-
- }
- points[pointpos++ % maxlen]= uc;
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
- DEBUG_TRIE_EXECUTE_r({
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf(Perl_debug_log,
- " Charid:%3u CP:%4"UVxf" ",
- charid, uvc);
- });
-
- do {
-#ifdef DEBUGGING
- word = aho->states[ state ].wordnum;
-#endif
- base = aho->states[ state ].trans.base;
-
- DEBUG_TRIE_EXECUTE_r({
- if (failed)
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%sState: %4"UVxf", word=%"UVxf,
- failed ? " Fail transition to " : "",
- (UV)state, (UV)word);
- });
- if ( base ) {
- U32 tmp;
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state
- && (tmp=trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next))
- {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - legal\n"));
- state = tmp;
- break;
- }
- else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - fail\n"));
- failed = 1;
- state = aho->fail[state];
- }
- }
- else {
- /* we must be accepting here */
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - accepting\n"));
- failed = 1;
- break;
- }
- } while(state);
- uc += len;
- if (failed) {
- if (leftmost)
- break;
- if (!state) state = 1;
- }
- }
- if ( aho->states[ state ].wordnum ) {
- U8 *lpos = points[ (pointpos - trie->wordlen[aho->states[ state ].wordnum-1]) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=aho->states[ state ].wordnum);
- leftmost = lpos;
- }
- }
- if (leftmost) {
- s = (char*)leftmost;
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf(
- Perl_debug_log,"Matches word #%"UVxf" at position %"IVdf". Trying full pattern...\n",
- (UV)accepted_word, (IV)(s - real_start)
- );
- });
- if (!reginfo || regtry(reginfo, &s)) {
- FREETMPS;
- LEAVE;
- goto got_it;
- }
- s = HOPc(s,1);
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,"Pattern failed. Looking for new start point...\n");
- });
- } else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,"No match.\n"));
- break;
- }
- }
- FREETMPS;
- LEAVE;
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c));
- break;
- }
- return 0;
- got_it:
- return s;
-}
-
-
-/*
- - regexec_flags - match a regexp against a string
- */
-I32
-Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, register char *strend,
- char *strbeg, I32 minend, SV *sv, void *data, U32 flags)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* data: May be used for some additional optimizations.
- Currently its only used, with a U32 cast, for transmitting
- the ganch offset when doing a /g match. This will change */
-/* nosave: For optimizations. */
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- /*register*/ char *s;
- register regnode *c;
- /*register*/ char *startpos = stringarg;
- I32 minlen; /* must match at least this many chars */
- I32 dontbother = 0; /* how many characters not to try at end */
- I32 end_shift = 0; /* Same for the end. */ /* CC */
- I32 scream_pos = -1; /* Internal iterator of scream. */
- char *scream_olds = NULL;
- const bool do_utf8 = (bool)DO_UTF8(sv);
- I32 multiline;
- RXi_GET_DECL(prog,progi);
- regmatch_info reginfo; /* create some info to pass to regtry etc */
- regexp_paren_pair *swap = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGEXEC_FLAGS;
- PERL_UNUSED_ARG(data);
-
- /* Be paranoid... */
- if (prog == NULL || startpos == NULL) {
- Perl_croak(aTHX_ "NULL regexp parameter");
- return 0;
- }
-
- multiline = prog->extflags & RXf_PMf_MULTILINE;
- reginfo.prog = rx; /* Yes, sorry that this is confusing. */
-
- RX_MATCH_UTF8_set(rx, do_utf8);
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, startpos, strend,
- "Matching");
- );
-
- minlen = prog->minlen;
-
- if (strend - startpos < (minlen+(prog->check_offset_min<0?prog->check_offset_min:0))) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short [regexec_flags]...\n"));
- goto phooey;
- }
-
-
- /* Check validity of program. */
- if (UCHARAT(progi->program) != REG_MAGIC) {
- Perl_croak(aTHX_ "corrupted regexp program");
- }
-
- PL_reg_flags = 0;
- PL_reg_eval_set = 0;
- PL_reg_maxiter = 0;
-
- if (RX_UTF8(rx))
- PL_reg_flags |= RF_utf8;
-
- /* Mark beginning of line for ^ and lookbehind. */
- reginfo.bol = startpos; /* XXX not used ??? */
- PL_bostr = strbeg;
- reginfo.sv = sv;
-
- /* Mark end of line for $ (and such) */
- PL_regeol = strend;
-
- /* see how far we have to get to not match where we matched before */
- reginfo.till = startpos+minend;
-
- /* If there is a "must appear" string, look for it. */
- s = startpos;
-
- if (prog->extflags & RXf_GPOS_SEEN) { /* Need to set reginfo->ganch */
- MAGIC *mg;
- if (flags & REXEC_IGNOREPOS){ /* Means: check only at start */
- reginfo.ganch = startpos + prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS IGNOREPOS: reginfo.ganch = startpos + %"UVxf"\n",(UV)prog->gofs));
- } else if (sv && SvTYPE(sv) >= SVt_PVMG
- && SvMAGIC(sv)
- && (mg = mg_find(sv, PERL_MAGIC_regex_global))
- && mg->mg_len >= 0) {
- reginfo.ganch = strbeg + mg->mg_len; /* Defined pos() */
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS MAGIC: reginfo.ganch = strbeg + %"IVdf"\n",(IV)mg->mg_len));
-
- if (prog->extflags & RXf_ANCH_GPOS) {
- if (s > reginfo.ganch)
- goto phooey;
- s = reginfo.ganch - prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS ANCH_GPOS: s = ganch - %"UVxf"\n",(UV)prog->gofs));
- if (s < strbeg)
- goto phooey;
- }
- }
- else if (data) {
- reginfo.ganch = strbeg + PTR2UV(data);
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS DATA: reginfo.ganch= strbeg + %"UVxf"\n",PTR2UV(data)));
-
- } else { /* pos() not defined */
- reginfo.ganch = strbeg;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS: reginfo.ganch = strbeg\n"));
- }
- }
- if (PL_curpm && (PM_GETRE(PL_curpm) == rx)) {
- /* We have to be careful. If the previous successful match
- was from this regex we don't want a subsequent partially
- successful match to clobber the old results.
- So when we detect this possibility we add a swap buffer
- to the re, and switch the buffer each match. If we fail
- we switch it back, otherwise we leave it swapped.
- */
- swap = prog->offs;
- /* do we need a save destructor here for eval dies? */
- Newxz(prog->offs, (prog->nparens + 1), regexp_paren_pair);
- }
- if (!(flags & REXEC_CHECKED) && (prog->check_substr != NULL || prog->check_utf8 != NULL)) {
- re_scream_pos_data d;
-
- d.scream_olds = &scream_olds;
- d.scream_pos = &scream_pos;
- s = re_intuit_start(rx, sv, s, strend, flags, &d);
- if (!s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not present...\n"));
- goto phooey; /* not present */
- }
- }
-
-
-
- /* Simplest case: anchored match need be tried only once. */
- /* [unless only anchor is BOL and multiline is set] */
- if (prog->extflags & (RXf_ANCH & ~RXf_ANCH_GPOS)) {
- if (s == startpos && regtry(®info, &startpos))
- goto got_it;
- else if (multiline || (prog->intflags & PREGf_IMPLICIT)
- || (prog->extflags & RXf_ANCH_MBOL)) /* XXXX SBOL? */
- {
- char *end;
-
- if (minlen)
- dontbother = minlen - 1;
- end = HOP3c(strend, -dontbother, strbeg) - 1;
- /* for multiline we only have to try after newlines */
- if (prog->check_substr || prog->check_utf8) {
- if (s == startpos)
- goto after_try;
- while (1) {
- if (regtry(®info, &s))
- goto got_it;
- after_try:
- if (s > end)
- goto phooey;
- if (prog->extflags & RXf_USE_INTUIT) {
- s = re_intuit_start(rx, sv, s + 1, strend, flags, NULL);
- if (!s)
- goto phooey;
- }
- else
- s++;
- }
- } else {
- if (s > startpos)
- s--;
- while (s < end) {
- if (*s++ == '\n') { /* don't need PL_utf8skip here */
- if (regtry(®info, &s))
- goto got_it;
- }
- }
- }
- }
- goto phooey;
- } else if (RXf_GPOS_CHECK == (prog->extflags & RXf_GPOS_CHECK))
- {
- /* the warning about reginfo.ganch being used without intialization
- is bogus -- we set it above, when prog->extflags & RXf_GPOS_SEEN
- and we only enter this block when the same bit is set. */
- char *tmp_s = reginfo.ganch - prog->gofs;
-
- if (tmp_s >= strbeg && regtry(®info, &tmp_s))
- goto got_it;
- goto phooey;
- }
-
- /* Messy cases: unanchored match. */
- if ((prog->anchored_substr || prog->anchored_utf8) && prog->intflags & PREGf_SKIP) {
- /* we have /x+whatever/ */
- /* it must be a one character string (XXXX Except UTF?) */
- char ch;
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- ch = SvPVX_const(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)[0];
-
- if (do_utf8) {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s += UTF8SKIP(s);
- while (s < strend && *s == ch)
- s += UTF8SKIP(s);
- }
- );
- }
- else {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s++;
- while (s < strend && *s == ch)
- s++;
- }
- );
- }
- DEBUG_EXECUTE_r(if (!did_match)
- PerlIO_printf(Perl_debug_log,
- "Did not find anchored character...\n")
- );
- }
- else if (prog->anchored_substr != NULL
- || prog->anchored_utf8 != NULL
- || ((prog->float_substr != NULL || prog->float_utf8 != NULL)
- && prog->float_max_offset < strend - s)) {
- SV *must;
- I32 back_max;
- I32 back_min;
- char *last;
- char *last1; /* Last position checked before */
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (prog->anchored_substr || prog->anchored_utf8) {
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- back_max = back_min = prog->anchored_offset;
- } else {
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- back_max = prog->float_max_offset;
- back_min = prog->float_min_offset;
- }
-
-
- if (must == &PL_sv_undef)
- /* could not downgrade utf8 check substring, so must fail */
- goto phooey;
-
- if (back_min<0) {
- last = strend;
- } else {
- last = HOP3c(strend, /* Cannot start after this */
- -(I32)(CHR_SVLEN(must)
- - (SvTAIL(must) != 0) + back_min), strbeg);
- }
- if (s > PL_bostr)
- last1 = HOPc(s, -1);
- else
- last1 = s - 1; /* bogus */
-
- /* XXXX check_substr already used to find "s", can optimize if
- check_substr==must. */
- scream_pos = -1;
- dontbother = end_shift;
- strend = HOPc(strend, -dontbother);
- while ( (s <= last) &&
- ((flags & REXEC_SCREAM)
- ? (s = screaminstr(sv, must, HOP3c(s, back_min, (back_min<0 ? strbeg : strend)) - strbeg,
- end_shift, &scream_pos, 0))
- : (s = fbm_instr((unsigned char*)HOP3(s, back_min, (back_min<0 ? strbeg : strend)),
- (unsigned char*)strend, must,
- multiline ? FBMrf_MULTILINE : 0))) ) {
- /* we may be pointing at the wrong string */
- if ((flags & REXEC_SCREAM) && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- DEBUG_EXECUTE_r( did_match = 1 );
- if (HOPc(s, -back_max) > last1) {
- last1 = HOPc(s, -back_min);
- s = HOPc(s, -back_max);
- }
- else {
- char * const t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1;
-
- last1 = HOPc(s, -back_min);
- s = t;
- }
- if (do_utf8) {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s += UTF8SKIP(s);
- }
- }
- else {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s++;
- }
- }
- }
- DEBUG_EXECUTE_r(if (!did_match) {
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "Did not find %s substr %s%s...\n",
- ((must == prog->anchored_substr || must == prog->anchored_utf8)
- ? "anchored" : "floating"),
- quoted, RE_SV_TAIL(must));
- });
- goto phooey;
- }
- else if ( (c = progi->regstclass) ) {
- if (minlen) {
- const OPCODE op = OP(progi->regstclass);
- /* don't bother with what can't match */
- if (PL_regkind[op] != EXACT && op != CANY && PL_regkind[op] != TRIE)
- strend = HOPc(strend, -(minlen - 1));
- }
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, c);
- {
- RE_PV_QUOTED_DECL(quoted,do_utf8,PERL_DEBUG_PAD_ZERO(1),
- s,strend-s,60);
- PerlIO_printf(Perl_debug_log,
- "Matching stclass %.*s against %s (%d chars)\n",
- (int)SvCUR(prop), SvPVX_const(prop),
- quoted, (int)(strend - s));
- }
- });
- if (find_byclass(prog, c, s, strend, ®info))
- goto got_it;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass... [regexec_flags]\n"));
- }
- else {
- dontbother = 0;
- if (prog->float_substr != NULL || prog->float_utf8 != NULL) {
- /* Trim the end. */
- char *last;
- SV* float_real;
-
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- float_real = do_utf8 ? prog->float_utf8 : prog->float_substr;
-
- if (flags & REXEC_SCREAM) {
- last = screaminstr(sv, float_real, s - strbeg,
- end_shift, &scream_pos, 1); /* last one */
- if (!last)
- last = scream_olds; /* Only one occurrence. */
- /* we may be pointing at the wrong string */
- else if (RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- }
- else {
- STRLEN len;
- const char * const little = SvPV_const(float_real, len);
-
- if (SvTAIL(float_real)) {
- if (memEQ(strend - len + 1, little, len - 1))
- last = strend - len + 1;
- else if (!multiline)
- last = memEQ(strend - len, little, len)
- ? strend - len : NULL;
- else
- goto find_last;
- } else {
- find_last:
- if (len)
- last = rninstr(s, strend, little, little + len);
- else
- last = strend; /* matching "$" */
- }
- }
- if (last == NULL) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%sCan't trim the tail, match fails (should not happen)%s\n",
- PL_colors[4], PL_colors[5]));
- goto phooey; /* Should not happen! */
- }
- dontbother = strend - last + prog->float_min_offset;
- }
- if (minlen && (dontbother < minlen))
- dontbother = minlen - 1;
- strend -= dontbother; /* this one's always in bytes! */
- /* We don't know much -- general case. */
- if (do_utf8) {
- for (;;) {
- if (regtry(®info, &s))
- goto got_it;
- if (s >= strend)
- break;
- s += UTF8SKIP(s);
- };
- }
- else {
- do {
- if (regtry(®info, &s))
- goto got_it;
- } while (s++ < strend);
- }
- }
-
- /* Failure. */
- goto phooey;
-
-got_it:
- Safefree(swap);
- RX_MATCH_TAINTED_set(rx, PL_reg_flags & RF_tainted);
-
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (RXp_PAREN_NAMES(prog))
- (void)hv_iterinit(RXp_PAREN_NAMES(prog));
-
- /* make sure $`, $&, $', and $digit will work later */
- if ( !(flags & REXEC_NOT_FIRST) ) {
- RX_MATCH_COPY_FREE(rx);
- if (flags & REXEC_COPY_STR) {
- const I32 i = PL_regeol - startpos + (stringarg - strbeg);
-#ifdef PERL_OLD_COPY_ON_WRITE
- if ((SvIsCOW(sv)
- || (SvFLAGS(sv) & CAN_COW_MASK) == CAN_COW_FLAGS)) {
- if (DEBUG_C_TEST) {
- PerlIO_printf(Perl_debug_log,
- "Copy on write: regexp capture, type %d\n",
- (int) SvTYPE(sv));
- }
- prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv);
- prog->subbeg = (char *)SvPVX_const(prog->saved_copy);
- assert (SvPOKp(prog->saved_copy));
- } else
-#endif
- {
- RX_MATCH_COPIED_on(rx);
- s = savepvn(strbeg, i);
- prog->subbeg = s;
- }
- prog->sublen = i;
- }
- else {
- prog->subbeg = strbeg;
- prog->sublen = PL_regeol - strbeg; /* strend may have been modified */
- }
- }
-
- return 1;
-
-phooey:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n",
- PL_colors[4], PL_colors[5]));
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (swap) {
- /* we failed :-( roll it back */
- Safefree(prog->offs);
- prog->offs = swap;
- }
-
- return 0;
-}
-
-
-/*
- - regtry - try match at specific point
- */
-STATIC I32 /* 0 failure, 1 success */
-S_regtry(pTHX_ regmatch_info *reginfo, char **startpos)
-{
- dVAR;
- CHECKPOINT lastcp;
- REGEXP *const rx = reginfo->prog;
- regexp *const prog = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTRY;
-
- reginfo->cutpoint=NULL;
-
- if ((prog->extflags & RXf_EVAL_SEEN) && !PL_reg_eval_set) {
- MAGIC *mg;
-
- PL_reg_eval_set = RS_init;
- DEBUG_EXECUTE_r(DEBUG_s(
- PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n",
- (IV)(PL_stack_sp - PL_stack_base));
- ));
- SAVESTACK_CXPOS();
- cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base;
- /* Otherwise OP_NEXTSTATE will free whatever on stack now. */
- SAVETMPS;
- /* Apparently this is not needed, judging by wantarray. */
- /* SAVEI8(cxstack[cxstack_ix].blk_gimme);
- cxstack[cxstack_ix].blk_gimme = G_SCALAR; */
-
- if (reginfo->sv) {
- /* Make $_ available to executed code. */
- if (reginfo->sv != DEFSV) {
- SAVE_DEFSV;
- DEFSV_set(reginfo->sv);
- }
-
- if (!(SvTYPE(reginfo->sv) >= SVt_PVMG && SvMAGIC(reginfo->sv)
- && (mg = mg_find(reginfo->sv, PERL_MAGIC_regex_global)))) {
- /* prepare for quick setting of pos */
-#ifdef PERL_OLD_COPY_ON_WRITE
- if (SvIsCOW(reginfo->sv))
- sv_force_normal_flags(reginfo->sv, 0);
-#endif
- mg = sv_magicext(reginfo->sv, NULL, PERL_MAGIC_regex_global,
- &PL_vtbl_mglob, NULL, 0);
- mg->mg_len = -1;
- }
- PL_reg_magic = mg;
- PL_reg_oldpos = mg->mg_len;
- SAVEDESTRUCTOR_X(restore_pos, prog);
- }
- if (!PL_reg_curpm) {
- Newxz(PL_reg_curpm, 1, PMOP);
-#ifdef USE_ITHREADS
- {
- SV* const repointer = &PL_sv_undef;
- /* this regexp is also owned by the new PL_reg_curpm, which
- will try to free it. */
- av_push(PL_regex_padav, repointer);
- PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav);
- PL_regex_pad = AvARRAY(PL_regex_padav);
- }
-#endif
- }
-#ifdef USE_ITHREADS
- /* It seems that non-ithreads works both with and without this code.
- So for efficiency reasons it seems best not to have the code
- compiled when it is not needed. */
- /* This is safe against NULLs: */
- ReREFCNT_dec(PM_GETRE(PL_reg_curpm));
- /* PM_reg_curpm owns a reference to this regexp. */
- ReREFCNT_inc(rx);
-#endif
- PM_SETRE(PL_reg_curpm, rx);
- PL_reg_oldcurpm = PL_curpm;
- PL_curpm = PL_reg_curpm;
- if (RXp_MATCH_COPIED(prog)) {
- /* Here is a serious problem: we cannot rewrite subbeg,
- since it may be needed if this match fails. Thus
- $` inside (?{}) could fail... */
- PL_reg_oldsaved = prog->subbeg;
- PL_reg_oldsavedlen = prog->sublen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = prog->saved_copy;
-#endif
- RXp_MATCH_COPIED_off(prog);
- }
- else
- PL_reg_oldsaved = NULL;
- prog->subbeg = PL_bostr;
- prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */
- }
- DEBUG_EXECUTE_r(PL_reg_starttry = *startpos);
- prog->offs[0].start = *startpos - PL_bostr;
- PL_reginput = *startpos;
- PL_reglastparen = &prog->lastparen;
- PL_reglastcloseparen = &prog->lastcloseparen;
- prog->lastparen = 0;
- prog->lastcloseparen = 0;
- PL_regsize = 0;
- PL_regoffs = prog->offs;
- if (PL_reg_start_tmpl <= prog->nparens) {
- PL_reg_start_tmpl = prog->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- /* XXXX What this code is doing here?!!! There should be no need
- to do this again and again, PL_reglastparen should take care of
- this! --ilya*/
-
- /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code.
- * Actually, the code in regcppop() (which Ilya may be meaning by
- * PL_reglastparen), is not needed at all by the test suite
- * (op/regexp, op/pat, op/split), but that code is needed otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * Meanwhile, this code *is* needed for the
- * above-mentioned test suite tests to succeed. The common theme
- * on those tests seems to be returning null fields from matches.
- * --jhi updated by dapm */
-#if 1
- if (prog->nparens) {
- regexp_paren_pair *pp = PL_regoffs;
- register I32 i;
- for (i = prog->nparens; i > (I32)*PL_reglastparen; i--) {
- ++pp;
- pp->start = -1;
- pp->end = -1;
- }
- }
-#endif
- REGCP_SET(lastcp);
- if (regmatch(reginfo, progi->program + 1)) {
- PL_regoffs[0].end = PL_reginput - PL_bostr;
- return 1;
- }
- if (reginfo->cutpoint)
- *startpos= reginfo->cutpoint;
- REGCP_UNWIND(lastcp);
- return 0;
-}
-
-
-#define sayYES goto yes
-#define sayNO goto no
-#define sayNO_SILENT goto no_silent
-
-/* we dont use STMT_START/END here because it leads to
- "unreachable code" warnings, which are bogus, but distracting. */
-#define CACHEsayNO \
- if (ST.cache_mask) \
- PL_reg_poscache[ST.cache_offset] |= ST.cache_mask; \
- sayNO
-
-/* this is used to determine how far from the left messages like
- 'failed...' are printed. It should be set such that messages
- are inline with the regop output that created them.
-*/
-#define REPORT_CODE_OFF 32
-
-
-/* Make sure there is a test for this +1 options in re_tests */
-#define TRIE_INITAL_ACCEPT_BUFFLEN 4;
-
-#define CHRTEST_UNINIT -1001 /* c1/c2 haven't been calculated yet */
-#define CHRTEST_VOID -1000 /* the c1/c2 "next char" test should be skipped */
-
-#define SLAB_FIRST(s) (&(s)->states[0])
-#define SLAB_LAST(s) (&(s)->states[PERL_REGMATCH_SLAB_SLOTS-1])
-
-/* grab a new slab and return the first slot in it */
-
-STATIC regmatch_state *
-S_push_slab(pTHX)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- regmatch_slab *s = PL_regmatch_slab->next;
- if (!s) {
- Newx(s, 1, regmatch_slab);
- s->prev = PL_regmatch_slab;
- s->next = NULL;
- PL_regmatch_slab->next = s;
- }
- PL_regmatch_slab = s;
- return SLAB_FIRST(s);
-}
-
-
-/* push a new state then goto it */
-
-#define PUSH_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_state;
-
-/* push a new state with success backtracking, then goto it */
-
-#define PUSH_YES_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_yes_state;
-
-
-
-/*
-
-regmatch() - main matching routine
-
-This is basically one big switch statement in a loop. We execute an op,
-set 'next' to point the next op, and continue. If we come to a point which
-we may need to backtrack to on failure such as (A|B|C), we push a
-backtrack state onto the backtrack stack. On failure, we pop the top
-state, and re-enter the loop at the state indicated. If there are no more
-states to pop, we return failure.
-
-Sometimes we also need to backtrack on success; for example /A+/, where
-after successfully matching one A, we need to go back and try to
-match another one; similarly for lookahead assertions: if the assertion
-completes successfully, we backtrack to the state just before the assertion
-and then carry on. In these cases, the pushed state is marked as
-'backtrack on success too'. This marking is in fact done by a chain of
-pointers, each pointing to the previous 'yes' state. On success, we pop to
-the nearest yes state, discarding any intermediate failure-only states.
-Sometimes a yes state is pushed just to force some cleanup code to be
-called at the end of a successful match or submatch; e.g. (??{$re}) uses
-it to free the inner regex.
-
-Note that failure backtracking rewinds the cursor position, while
-success backtracking leaves it alone.
-
-A pattern is complete when the END op is executed, while a subpattern
-such as (?=foo) is complete when the SUCCESS op is executed. Both of these
-ops trigger the "pop to last yes state if any, otherwise return true"
-behaviour.
-
-A common convention in this function is to use A and B to refer to the two
-subpatterns (or to the first nodes thereof) in patterns like /A*B/: so A is
-the subpattern to be matched possibly multiple times, while B is the entire
-rest of the pattern. Variable and state names reflect this convention.
-
-The states in the main switch are the union of ops and failure/success of
-substates associated with with that op. For example, IFMATCH is the op
-that does lookahead assertions /(?=A)B/ and so the IFMATCH state means
-'execute IFMATCH'; while IFMATCH_A is a state saying that we have just
-successfully matched A and IFMATCH_A_fail is a state saying that we have
-just failed to match A. Resume states always come in pairs. The backtrack
-state we push is marked as 'IFMATCH_A', but when that is popped, we resume
-at IFMATCH_A or IFMATCH_A_fail, depending on whether we are backtracking
-on success or failure.
-
-The struct that holds a backtracking state is actually a big union, with
-one variant for each major type of op. The variable st points to the
-top-most backtrack struct. To make the code clearer, within each
-block of code we #define ST to alias the relevant union.
-
-Here's a concrete example of a (vastly oversimplified) IFMATCH
-implementation:
-
- switch (state) {
- ....
-
-#define ST st->u.ifmatch
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- ST.foo = ...; // some state we wish to save
- ...
- // push a yes backtrack state with a resume value of
- // IFMATCH_A/IFMATCH_A_fail, then continue execution at the
- // first node of A:
- PUSH_YES_STATE_GOTO(IFMATCH_A, A);
- // NOTREACHED
-
- case IFMATCH_A: // we have successfully executed A; now continue with B
- next = B;
- bar = ST.foo; // do something with the preserved value
- break;
-
- case IFMATCH_A_fail: // A failed, so the assertion failed
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
-
-#undef ST
-
- ...
- }
-
-For any old-timers reading this who are familiar with the old recursive
-approach, the code above is equivalent to:
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- {
- int foo = ...
- ...
- if (regmatch(A)) {
- next = B;
- bar = foo;
- break;
- }
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
- }
-
-The topmost backtrack state, pointed to by st, is usually free. If you
-want to claim it, populate any ST.foo fields in it with values you wish to
-save, then do one of
-
- PUSH_STATE_GOTO(resume_state, node);
- PUSH_YES_STATE_GOTO(resume_state, node);
-
-which sets that backtrack state's resume value to 'resume_state', pushes a
-new free entry to the top of the backtrack stack, then goes to 'node'.
-On backtracking, the free slot is popped, and the saved state becomes the
-new free state. An ST.foo field in this new top state can be temporarily
-accessed to retrieve values, but once the main loop is re-entered, it
-becomes available for reuse.
-
-Note that the depth of the backtrack stack constantly increases during the
-left-to-right execution of the pattern, rather than going up and down with
-the pattern nesting. For example the stack is at its maximum at Z at the
-end of the pattern, rather than at X in the following:
-
- /(((X)+)+)+....(Y)+....Z/
-
-The only exceptions to this are lookahead/behind assertions and the cut,
-(?>A), which pop all the backtrack states associated with A before
-continuing.
-
-Bascktrack state structs are allocated in slabs of about 4K in size.
-PL_regmatch_state and st always point to the currently active state,
-and PL_regmatch_slab points to the slab currently containing
-PL_regmatch_state. The first time regmatch() is called, the first slab is
-allocated, and is never freed until interpreter destruction. When the slab
-is full, a new one is allocated and chained to the end. At exit from
-regmatch(), slabs allocated since entry are freed.
-
-*/
-
-
-#define DEBUG_STATE_pp(pp) \
- DEBUG_STATE_r({ \
- DUMP_EXEC_POS(locinput, scan, do_utf8); \
- PerlIO_printf(Perl_debug_log, \
- " %*s"pp" %s%s%s%s%s\n", \
- depth*2, "", \
- PL_reg_name[st->resume_state], \
- ((st==yes_state||st==mark_state) ? "[" : ""), \
- ((st==yes_state) ? "Y" : ""), \
- ((st==mark_state) ? "M" : ""), \
- ((st==yes_state||st==mark_state) ? "]" : "") \
- ); \
- });
-
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-prog) : -1)
-
-#ifdef DEBUGGING
-
-STATIC void
-S_debug_start_match(pTHX_ const REGEXP *prog, const bool do_utf8,
- const char *start, const char *end, const char *blurb)
-{
- const bool utf8_pat = RX_UTF8(prog) ? 1 : 0;
-
- PERL_ARGS_ASSERT_DEBUG_START_MATCH;
-
- if (!PL_colorset)
- reginitcolors();
- {
- RE_PV_QUOTED_DECL(s0, utf8_pat, PERL_DEBUG_PAD_ZERO(0),
- RX_PRECOMP_const(prog), RX_PRELEN(prog), 60);
-
- RE_PV_QUOTED_DECL(s1, do_utf8, PERL_DEBUG_PAD_ZERO(1),
- start, end - start, 60);
-
- PerlIO_printf(Perl_debug_log,
- "%s%s REx%s %s against %s\n",
- PL_colors[4], blurb, PL_colors[5], s0, s1);
-
- if (do_utf8||utf8_pat)
- PerlIO_printf(Perl_debug_log, "UTF-8 %s%s%s...\n",
- utf8_pat ? "pattern" : "",
- utf8_pat && do_utf8 ? " and " : "",
- do_utf8 ? "string" : ""
- );
- }
-}
-
-STATIC void
-S_dump_exec_pos(pTHX_ const char *locinput,
- const regnode *scan,
- const char *loc_regeol,
- const char *loc_bostr,
- const char *loc_reg_starttry,
- const bool do_utf8)
-{
- const int docolor = *PL_colors[0] || *PL_colors[2] || *PL_colors[4];
- const int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */
- int l = (loc_regeol - locinput) > taill ? taill : (loc_regeol - locinput);
- /* The part of the string before starttry has one color
- (pref0_len chars), between starttry and current
- position another one (pref_len - pref0_len chars),
- after the current position the third one.
- We assume that pref0_len <= pref_len, otherwise we
- decrease pref0_len. */
- int pref_len = (locinput - loc_bostr) > (5 + taill) - l
- ? (5 + taill) - l : locinput - loc_bostr;
- int pref0_len;
-
- PERL_ARGS_ASSERT_DUMP_EXEC_POS;
-
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len)))
- pref_len++;
- pref0_len = pref_len - (locinput - loc_reg_starttry);
- if (l + pref_len < (5 + taill) && l < loc_regeol - locinput)
- l = ( loc_regeol - locinput > (5 + taill) - pref_len
- ? (5 + taill) - pref_len : loc_regeol - locinput);
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput + l)))
- l--;
- if (pref0_len < 0)
- pref0_len = 0;
- if (pref0_len > pref_len)
- pref0_len = pref_len;
- {
- const int is_uni = (do_utf8 && OP(scan) != CANY) ? 1 : 0;
-
- RE_PV_COLOR_DECL(s0,len0,is_uni,PERL_DEBUG_PAD(0),
- (locinput - pref_len),pref0_len, 60, 4, 5);
-
- RE_PV_COLOR_DECL(s1,len1,is_uni,PERL_DEBUG_PAD(1),
- (locinput - pref_len + pref0_len),
- pref_len - pref0_len, 60, 2, 3);
-
- RE_PV_COLOR_DECL(s2,len2,is_uni,PERL_DEBUG_PAD(2),
- locinput, loc_regeol - locinput, 10, 0, 1);
-
- const STRLEN tlen=len0+len1+len2;
- PerlIO_printf(Perl_debug_log,
- "%4"IVdf" <%.*s%.*s%s%.*s>%*s|",
- (IV)(locinput - loc_bostr),
- len0, s0,
- len1, s1,
- (docolor ? "" : "> <"),
- len2, s2,
- (int)(tlen > 19 ? 0 : 19 - tlen),
- "");
- }
-}
-
-#endif
-
-/* reg_check_named_buff_matched()
- * Checks to see if a named buffer has matched. The data array of
- * buffer numbers corresponding to the buffer is expected to reside
- * in the regexp->data->data array in the slot stored in the ARG() of
- * node involved. Note that this routine doesn't actually care about the
- * name, that information is not preserved from compilation to execution.
- * Returns the index of the leftmost defined buffer with the given name
- * or 0 if non of the buffers matched.
- */
-STATIC I32
-S_reg_check_named_buff_matched(pTHX_ const regexp *rex, const regnode *scan)
-{
- I32 n;
- RXi_GET_DECL(rex,rexi);
- SV *sv_dat= MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
-
- PERL_ARGS_ASSERT_REG_CHECK_NAMED_BUFF_MATCHED;
-
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- if ((I32)*PL_reglastparen >= nums[n] &&
- PL_regoffs[nums[n]].end != -1)
- {
- return nums[n];
- }
- }
- return 0;
-}
-
-
-/* free all slabs above current one - called during LEAVE_SCOPE */
-
-STATIC void
-S_clear_backtrack_stack(pTHX_ void *p)
-{
- regmatch_slab *s = PL_regmatch_slab->next;
- PERL_UNUSED_ARG(p);
-
- if (!s)
- return;
- PL_regmatch_slab->next = NULL;
- while (s) {
- regmatch_slab * const osl = s;
- s = s->next;
- Safefree(osl);
- }
-}
-
-
-#define SETREX(Re1,Re2) \
- if (PL_reg_eval_set) PM_SETRE((PL_reg_curpm), (Re2)); \
- Re1 = (Re2)
-
-STATIC I32 /* 0 failure, 1 success */
-S_regmatch(pTHX_ regmatch_info *reginfo, regnode *prog)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- dVAR;
- register const bool do_utf8 = PL_reg_match_utf8;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- REGEXP *rex_sv = reginfo->prog;
- regexp *rex = (struct regexp *)SvANY(rex_sv);
- RXi_GET_DECL(rex,rexi);
- I32 oldsave;
- /* the current state. This is a cached copy of PL_regmatch_state */
- register regmatch_state *st;
- /* cache heavy used fields of st in registers */
- register regnode *scan;
- register regnode *next;
- register U32 n = 0; /* general value; init to avoid compiler warning */
- register I32 ln = 0; /* len or last; init to avoid compiler warning */
- register char *locinput = PL_reginput;
- register I32 nextchr; /* is always set to UCHARAT(locinput) */
-
- bool result = 0; /* return value of S_regmatch */
- int depth = 0; /* depth of backtrack stack */
- U32 nochange_depth = 0; /* depth of GOSUB recursion with nochange */
- const U32 max_nochange_depth =
- (3 * rex->nparens > MAX_RECURSE_EVAL_NOCHANGE_DEPTH) ?
- 3 * rex->nparens : MAX_RECURSE_EVAL_NOCHANGE_DEPTH;
- regmatch_state *yes_state = NULL; /* state to pop to on success of
- subpattern */
- /* mark_state piggy backs on the yes_state logic so that when we unwind
- the stack on success we can update the mark_state as we go */
- regmatch_state *mark_state = NULL; /* last mark state we have seen */
- regmatch_state *cur_eval = NULL; /* most recent EVAL_AB state */
- struct regmatch_state *cur_curlyx = NULL; /* most recent curlyx */
- U32 state_num;
- bool no_final = 0; /* prevent failure from backtracking? */
- bool do_cutgroup = 0; /* no_final only until next branch/trie entry */
- char *startpoint = PL_reginput;
- SV *popmark = NULL; /* are we looking for a mark? */
- SV *sv_commit = NULL; /* last mark name seen in failure */
- SV *sv_yes_mark = NULL; /* last mark name we have seen
- during a successfull match */
- U32 lastopen = 0; /* last open we saw */
- bool has_cutgroup = RX_HAS_CUTGROUP(rex) ? 1 : 0;
- SV* const oreplsv = GvSV(PL_replgv);
- /* these three flags are set by various ops to signal information to
- * the very next op. They have a useful lifetime of exactly one loop
- * iteration, and are not preserved or restored by state pushes/pops
- */
- bool sw = 0; /* the condition value in (?(cond)a|b) */
- bool minmod = 0; /* the next "{n,m}" is a "{n,m}?" */
- int logical = 0; /* the following EVAL is:
- 0: (?{...})
- 1: (?(?{...})X|Y)
- 2: (??{...})
- or the following IFMATCH/UNLESSM is:
- false: plain (?=foo)
- true: used as a condition: (?(?=foo))
- */
-#ifdef DEBUGGING
- GET_RE_DEBUG_FLAGS_DECL;
-#endif
-
- PERL_ARGS_ASSERT_REGMATCH;
-
- DEBUG_OPTIMISE_r( DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,"regmatch start\n");
- }));
- /* on first ever call to regmatch, allocate first slab */
- if (!PL_regmatch_slab) {
- Newx(PL_regmatch_slab, 1, regmatch_slab);
- PL_regmatch_slab->prev = NULL;
- PL_regmatch_slab->next = NULL;
- PL_regmatch_state = SLAB_FIRST(PL_regmatch_slab);
- }
-
- oldsave = PL_savestack_ix;
- SAVEDESTRUCTOR_X(S_clear_backtrack_stack, NULL);
- SAVEVPTR(PL_regmatch_slab);
- SAVEVPTR(PL_regmatch_state);
-
- /* grab next free state slot */
- st = ++PL_regmatch_state;
- if (st > SLAB_LAST(PL_regmatch_slab))
- st = PL_regmatch_state = S_push_slab(aTHX);
-
- /* Note that nextchr is a byte even in UTF */
- nextchr = UCHARAT(locinput);
- scan = prog;
- while (scan != NULL) {
-
- DEBUG_EXECUTE_r( {
- SV * const prop = sv_newmortal();
- regnode *rnext=regnext(scan);
- DUMP_EXEC_POS( locinput, scan, do_utf8 );
- regprop(rex, prop, scan);
-
- PerlIO_printf(Perl_debug_log,
- "%3"IVdf":%*s%s(%"IVdf")\n",
- (IV)(scan - rexi->program), depth*2, "",
- SvPVX_const(prop),
- (PL_regkind[OP(scan)] == END || !rnext) ?
- 0 : (IV)(rnext - rexi->program));
- });
-
- next = scan + NEXT_OFF(scan);
- if (next == scan)
- next = NULL;
- state_num = OP(scan);
-
- reenter_switch:
-
- assert(PL_reglastparen == &rex->lastparen);
- assert(PL_reglastcloseparen == &rex->lastcloseparen);
- assert(PL_regoffs == rex->offs);
-
- switch (state_num) {
- case BOL:
- if (locinput == PL_bostr)
- {
- /* reginfo->till = reginfo->bol; */
- break;
- }
- sayNO;
- case MBOL:
- if (locinput == PL_bostr ||
- ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n'))
- {
- break;
- }
- sayNO;
- case SBOL:
- if (locinput == PL_bostr)
- break;
- sayNO;
- case GPOS:
- if (locinput == reginfo->ganch)
- break;
- sayNO;
-
- case KEEPS:
- /* update the startpoint */
- st->u.keeper.val = PL_regoffs[0].start;
- PL_reginput = locinput;
- PL_regoffs[0].start = locinput - PL_bostr;
- PUSH_STATE_GOTO(KEEPS_next, next);
- /*NOT-REACHED*/
- case KEEPS_next_fail:
- /* rollback the start point change */
- PL_regoffs[0].start = st->u.keeper.val;
- sayNO_SILENT;
- /*NOT-REACHED*/
- case EOL:
- goto seol;
- case MEOL:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- break;
- case SEOL:
- seol:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- if (PL_regeol - locinput > 1)
- sayNO;
- break;
- case EOS:
- if (PL_regeol != locinput)
- sayNO;
- break;
- case SANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
- case CANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case REG_ANY:
- if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n')
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
-
-#undef ST
-#define ST st->u.trie
- case TRIEC:
- /* In this case the charclass data is available inline so
- we can fail fast without a lot of extra overhead.
- */
- if (scan->flags == EXACT || !do_utf8) {
- if(!ANYOF_BITMAP_TEST(scan, *locinput)) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case TRIE:
- {
- /* what type of TRIE am I? (utf8 makes this contextual) */
- DECL_TRIE_TYPE(scan);
-
- /* what trie are we using right now */
- reg_trie_data * const trie
- = (reg_trie_data*)rexi->data->data[ ARG( scan ) ];
- HV * widecharmap = MUTABLE_HV(rexi->data->data[ ARG( scan ) + 1 ]);
- U32 state = trie->startstate;
-
- if (trie->bitmap && trie_type != trie_utf8_fold &&
- !TRIE_BITMAP_TEST(trie,*locinput)
- ) {
- if (trie->states[ state ].wordnum) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %smatched empty string...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- break;
- } else {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- }
- }
-
- {
- U8 *uc = ( U8* )locinput;
-
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- STRLEN bufflen=0;
- SV *sv_accept_buff = NULL;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- ST.accepted = 0; /* how many accepting states we have seen */
- ST.B = next;
- ST.jump = trie->jump;
- ST.me = scan;
- /*
- traverse the TRIE keeping track of all accepting states
- we transition through until we get to a failing node.
- */
-
- while ( state && uc <= (U8*)PL_regeol ) {
- U32 base = trie->states[ state ].trans.base;
- UV uvc = 0;
- U16 charid;
- /* We use charid to hold the wordnum as we don't use it
- for charid until after we have done the wordnum logic.
- We define an alias just so that the wordnum logic reads
- more naturally. */
-
-#define got_wordnum charid
- got_wordnum = trie->states[ state ].wordnum;
-
- if ( got_wordnum ) {
- if ( ! ST.accepted ) {
- ENTER;
- SAVETMPS; /* XXX is this necessary? dmq */
- bufflen = TRIE_INITAL_ACCEPT_BUFFLEN;
- sv_accept_buff=newSV(bufflen *
- sizeof(reg_trie_accepted) - 1);
- SvCUR_set(sv_accept_buff, 0);
- SvPOK_on(sv_accept_buff);
- sv_2mortal(sv_accept_buff);
- SAVETMPS;
- ST.accept_buff =
- (reg_trie_accepted*)SvPV_nolen(sv_accept_buff );
- }
- do {
- if (ST.accepted >= bufflen) {
- bufflen *= 2;
- ST.accept_buff =(reg_trie_accepted*)
- SvGROW(sv_accept_buff,
- bufflen * sizeof(reg_trie_accepted));
- }
- SvCUR_set(sv_accept_buff,SvCUR(sv_accept_buff)
- + sizeof(reg_trie_accepted));
-
-
- ST.accept_buff[ST.accepted].wordnum = got_wordnum;
- ST.accept_buff[ST.accepted].endpos = uc;
- ++ST.accepted;
- } while (trie->nextword && (got_wordnum= trie->nextword[got_wordnum]));
- }
-#undef got_wordnum
-
- DEBUG_TRIE_EXECUTE_r({
- DUMP_EXEC_POS( (char *)uc, scan, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%*s %sState: %4"UVxf" Accepted: %4"UVxf" ",
- 2+depth * 2, "", PL_colors[4],
- (UV)state, (UV)ST.accepted );
- });
-
- if ( base ) {
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
-
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state)
- {
- state = trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next;
- }
- else {
- state = 0;
- }
- uc += len;
-
- }
- else {
- state = 0;
- }
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "Charid:%3x CP:%4"UVxf" After State: %4"UVxf"%s\n",
- charid, uvc, (UV)state, PL_colors[5] );
- );
- }
- if (!ST.accepted )
- sayNO;
-
- DEBUG_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" possible matches%s\n",
- REPORT_CODE_OFF + depth * 2, "",
- PL_colors[4], (IV)ST.accepted, PL_colors[5] );
- );
- }}
- goto trie_first_try; /* jump into the fail handler */
- /* NOTREACHED */
- case TRIE_next_fail: /* we failed - try next alterative */
- if ( ST.jump) {
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- }
- trie_first_try:
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
-
- if ( ST.jump) {
- ST.lastparen = *PL_reglastparen;
- REGCP_SET(ST.cp);
- }
- if ( ST.accepted == 1 ) {
- /* only one choice left - just continue */
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ 0 ].wordnum-1, 0 );
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %sonly one match left: #%d <%s>%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[ 0 ].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- )
- : "not compiled under -Dr",
- PL_colors[5] );
- });
- PL_reginput = (char *)ST.accept_buff[ 0 ].endpos;
- /* in this case we free tmps/leave before we call regmatch
- as we wont be using accept_buff again. */
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- if ( !ST.jump || !ST.jump[ST.accept_buff[0].wordnum])
- scan = ST.B;
- else
- scan = ST.me + ST.jump[ST.accept_buff[0].wordnum];
- if (!has_cutgroup) {
- FREETMPS;
- LEAVE;
- } else {
- ST.accepted--;
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- }
-
- continue; /* execute rest of RE */
- }
-
- if ( !ST.accepted-- ) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sTRIE failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- FREETMPS;
- LEAVE;
- sayNO_SILENT;
- /*NOTREACHED*/
- }
-
- /*
- There are at least two accepting states left. Presumably
- the number of accepting states is going to be low,
- typically two. So we simply scan through to find the one
- with lowest wordnum. Once we find it, we swap the last
- state into its place and decrement the size. We then try to
- match the rest of the pattern at the point where the word
- ends. If we succeed, control just continues along the
- regex; if we fail we return here to try the next accepting
- state
- */
-
- {
- U32 best = 0;
- U32 cur;
- for( cur = 1 ; cur <= ST.accepted ; cur++ ) {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" (%d) as best, looking at %"IVdf" (%d)%s\n",
- REPORT_CODE_OFF + depth * 2, "", PL_colors[4],
- (IV)best, ST.accept_buff[ best ].wordnum, (IV)cur,
- ST.accept_buff[ cur ].wordnum, PL_colors[5] );
- );
-
- if (ST.accept_buff[cur].wordnum <
- ST.accept_buff[best].wordnum)
- best = cur;
- }
-
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ best ].wordnum - 1, 0 );
- regnode *nextop=(!ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) ?
- ST.B :
- ST.me + ST.jump[ST.accept_buff[best].wordnum];
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %strying alternation #%d <%s> at node #%d %s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[best].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- ) : "not compiled under -Dr",
- REG_NODE_NUM(nextop),
- PL_colors[5] );
- });
-
- if ( best<ST.accepted ) {
- reg_trie_accepted tmp = ST.accept_buff[ best ];
- ST.accept_buff[ best ] = ST.accept_buff[ ST.accepted ];
- ST.accept_buff[ ST.accepted ] = tmp;
- best = ST.accepted;
- }
- PL_reginput = (char *)ST.accept_buff[ best ].endpos;
- if ( !ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) {
- scan = ST.B;
- } else {
- scan = ST.me + ST.jump[ST.accept_buff[best].wordnum];
- }
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- /* NOTREACHED */
- }
- /* NOTREACHED */
- case TRIE_next:
- /* we dont want to throw this away, see bug 57042*/
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- FREETMPS;
- LEAVE;
- sayYES;
-#undef ST
-
- case EXACT: {
- char *s = STRING(scan);
- ln = STR_LEN(scan);
- if (do_utf8 != UTF) {
- /* The target and the pattern have differing utf8ness. */
- char *l = locinput;
- const char * const e = s + ln;
-
- if (do_utf8) {
- /* The target is utf8, the pattern is not utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*(U8*)s) !=
- utf8n_to_uvuni((U8*)l, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- l += ulen;
- s ++;
- }
- }
- else {
- /* The target is not utf8, the pattern is utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*((U8*)l)) !=
- utf8n_to_uvuni((U8*)s, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- s += ulen;
- l ++;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
- /* The target and the pattern have the same utf8ness. */
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr)
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && memNE(s, locinput, ln))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case EXACTFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case EXACTF: {
- char * const s = STRING(scan);
- ln = STR_LEN(scan);
-
- if (do_utf8 || UTF) {
- /* Either target or the pattern are utf8. */
- const char * const l = locinput;
- char *e = PL_regeol;
-
- if (ibcmp_utf8(s, 0, ln, (bool)UTF,
- l, &e, 0, do_utf8)) {
- /* One more case for the sharp s:
- * pack("U0U*", 0xDF) =~ /ss/i,
- * the 0xC3 0x9F are the UTF-8
- * byte sequence for the U+00DF. */
-
- if (!(do_utf8 &&
- toLOWER(s[0]) == 's' &&
- ln >= 2 &&
- toLOWER(s[1]) == 's' &&
- (U8)l[0] == 0xC3 &&
- e - l >= 2 &&
- (U8)l[1] == 0x9F))
- sayNO;
- }
- locinput = e;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Neither the target and the pattern are utf8. */
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- UCHARAT(s) != ((OP(scan) == EXACTF)
- ? PL_fold : PL_fold_locale)[nextchr])
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && (OP(scan) == EXACTF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln)))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case ANYOF:
- if (do_utf8) {
- STRLEN inclasslen = PL_regeol - locinput;
-
- if (!reginclass(rex, scan, (U8*)locinput, &inclasslen, do_utf8))
- goto anyof_fail;
- if (locinput >= PL_regeol)
- sayNO;
- locinput += inclasslen ? inclasslen : UTF8SKIP(locinput);
- nextchr = UCHARAT(locinput);
- break;
- }
- else {
- if (nextchr < 0)
- nextchr = UCHARAT(locinput);
- if (!REGINCLASS(rex, scan, (U8*)locinput))
- goto anyof_fail;
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- }
- anyof_fail:
- /* If we might have the case of the German sharp s
- * in a casefolding Unicode character class. */
-
- if (ANYOF_FOLD_SHARP_S(scan, locinput, PL_regeol)) {
- locinput += SHARP_S_SKIP;
- nextchr = UCHARAT(locinput);
- }
- else
- sayNO;
- break;
- case ALNUML:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case ALNUM:
- if (!nextchr)
- sayNO;
- if (do_utf8) {
- LOAD_UTF8_CHARCLASS_ALNUM();
- if (!(OP(scan) == ALNUM
- ? (bool)swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8)
- : isALNUM_LC_utf8((U8*)locinput)))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (!(OP(scan) == ALNUM
- ? isALNUM(nextchr) : isALNUM_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NALNUML:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NALNUM:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- LOAD_UTF8_CHARCLASS_ALNUM();
- if (OP(scan) == NALNUM
- ? (bool)swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8)
- : isALNUM_LC_utf8((U8*)locinput))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (OP(scan) == NALNUM
- ? isALNUM(nextchr) : isALNUM_LC(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case BOUNDL:
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- case NBOUND:
- /* was last char in word? */
- if (do_utf8) {
- if (locinput == PL_bostr)
- ln = '\n';
- else {
- const U8 * const r = reghop3((U8*)locinput, -1, (U8*)PL_bostr);
-
- ln = utf8n_to_uvchr(r, UTF8SKIP(r), 0, uniflags);
- }
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM_uni(ln);
- LOAD_UTF8_CHARCLASS_ALNUM();
- n = swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8);
- }
- else {
- ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln));
- n = isALNUM_LC_utf8((U8*)locinput);
- }
- }
- else {
- ln = (locinput != PL_bostr) ?
- UCHARAT(locinput - 1) : '\n';
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM(ln);
- n = isALNUM(nextchr);
- }
- else {
- ln = isALNUM_LC(ln);
- n = isALNUM_LC(nextchr);
- }
- }
- if (((!ln) == (!n)) == (OP(scan) == BOUND ||
- OP(scan) == BOUNDL))
- sayNO;
- break;
- case SPACEL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case SPACE:
- if (!nextchr)
- sayNO;
- if (do_utf8) {
- if (UTF8_IS_CONTINUED(nextchr)) {
- LOAD_UTF8_CHARCLASS_SPACE();
- if (!(OP(scan) == SPACE
- ? (bool)swash_fetch(PL_utf8_space, (U8*)locinput, do_utf8)
- : isSPACE_LC_utf8((U8*)locinput)))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (!(OP(scan) == SPACE
- ? isSPACE(nextchr) : isSPACE_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- }
- else {
- if (!(OP(scan) == SPACE
- ? isSPACE(nextchr) : isSPACE_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- }
- break;
- case NSPACEL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NSPACE:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- LOAD_UTF8_CHARCLASS_SPACE();
- if (OP(scan) == NSPACE
- ? (bool)swash_fetch(PL_utf8_space, (U8*)locinput, do_utf8)
- : isSPACE_LC_utf8((U8*)locinput))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (OP(scan) == NSPACE
- ? isSPACE(nextchr) : isSPACE_LC(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case DIGITL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case DIGIT:
- if (!nextchr)
- sayNO;
- if (do_utf8) {
- LOAD_UTF8_CHARCLASS_DIGIT();
- if (!(OP(scan) == DIGIT
- ? (bool)swash_fetch(PL_utf8_digit, (U8*)locinput, do_utf8)
- : isDIGIT_LC_utf8((U8*)locinput)))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (!(OP(scan) == DIGIT
- ? isDIGIT(nextchr) : isDIGIT_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NDIGITL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NDIGIT:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- LOAD_UTF8_CHARCLASS_DIGIT();
- if (OP(scan) == NDIGIT
- ? (bool)swash_fetch(PL_utf8_digit, (U8*)locinput, do_utf8)
- : isDIGIT_LC_utf8((U8*)locinput))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (OP(scan) == NDIGIT
- ? isDIGIT(nextchr) : isDIGIT_LC(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case CLUMP:
- if (locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- LOAD_UTF8_CHARCLASS_MARK();
- if (swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8))
- sayNO;
- locinput += PL_utf8skip[nextchr];
- while (locinput < PL_regeol &&
- swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8))
- locinput += UTF8SKIP(locinput);
- if (locinput > PL_regeol)
- sayNO;
- }
- else
- locinput++;
- nextchr = UCHARAT(locinput);
- break;
-
- case NREFFL:
- {
- char *s;
- char type;
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NREF:
- case NREFF:
- type = OP(scan);
- n = reg_check_named_buff_matched(rex,scan);
-
- if ( n ) {
- type = REF + ( type - NREF );
- goto do_ref;
- } else {
- sayNO;
- }
- /* unreached */
- case REFFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case REF:
- case REFF:
- n = ARG(scan); /* which paren pair */
- type = OP(scan);
- do_ref:
- ln = PL_regoffs[n].start;
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (*PL_reglastparen < n || ln == -1)
- sayNO; /* Do not match unless seen CLOSEn. */
- if (ln == PL_regoffs[n].end)
- break;
-
- s = PL_bostr + ln;
- if (do_utf8 && type != REF) { /* REF can do byte comparison */
- char *l = locinput;
- const char *e = PL_bostr + PL_regoffs[n].end;
- /*
- * Note that we can't do the "other character" lookup trick as
- * in the 8-bit case (no pun intended) because in Unicode we
- * have to map both upper and title case to lower case.
- */
- if (type == REFF) {
- while (s < e) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- if (l >= PL_regeol)
- sayNO;
- toLOWER_utf8((U8*)s, tmpbuf1, &ulen1);
- toLOWER_utf8((U8*)l, tmpbuf2, &ulen2);
- if (ulen1 != ulen2 || memNE((char *)tmpbuf1, (char *)tmpbuf2, ulen1))
- sayNO;
- s += ulen1;
- l += ulen2;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- (type == REF ||
- (UCHARAT(s) != (type == REFF
- ? PL_fold : PL_fold_locale)[nextchr])))
- sayNO;
- ln = PL_regoffs[n].end - ln;
- if (locinput + ln > PL_regeol)
- sayNO;
- if (ln > 1 && (type == REF
- ? memNE(s, locinput, ln)
- : (type == REFF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln))))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case NOTHING:
- case TAIL:
- break;
- case BACK:
- break;
-
-#undef ST
-#define ST st->u.eval
- {
- SV *ret;
- REGEXP *re_sv;
- regexp *re;
- regexp_internal *rei;
- regnode *startpoint;
-
- case GOSTART:
- case GOSUB: /* /(...(?1))/ /(...(?&foo))/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if (cur_eval->u.eval.close_paren == (U32)ARG(scan))
- Perl_croak(aTHX_ "Infinite recursion in regex");
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_
- "Pattern subroutine nesting without pos change"
- " exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- re_sv = rex_sv;
- re = rex;
- rei = rexi;
- (void)ReREFCNT_inc(rex_sv);
- if (OP(scan)==GOSUB) {
- startpoint = scan + ARG2L(scan);
- ST.close_paren = ARG(scan);
- } else {
- startpoint = rei->program+1;
- ST.close_paren = 0;
- }
- goto eval_recurse_doit;
- /* NOTREACHED */
- case EVAL: /* /(?{A})B/ /(??{A})B/ and /(?(?{A})X|Y)B/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_ "EVAL without pos change exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- {
- /* execute the code in the {...} */
- dSP;
- SV ** const before = SP;
- OP_4tree * const oop = PL_op;
- COP * const ocurcop = PL_curcop;
- PAD *old_comppad;
- char *saved_regeol = PL_regeol;
-
- n = ARG(scan);
- PL_op = (OP_4tree*)rexi->data->data[n];
- DEBUG_STATE_r( PerlIO_printf(Perl_debug_log,
- " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) );
- PAD_SAVE_LOCAL(old_comppad, (PAD*)rexi->data->data[n + 2]);
- PL_regoffs[0].end = PL_reg_magic->mg_len = locinput - PL_bostr;
-
- if (sv_yes_mark) {
- SV *sv_mrk = get_sv("REGMARK", 1);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- CALLRUNOPS(aTHX); /* Scalar context. */
- SPAGAIN;
- if (SP == before)
- ret = &PL_sv_undef; /* protect against empty (?{}) blocks. */
- else {
- ret = POPs;
- PUTBACK;
- }
-
- PL_op = oop;
- PAD_RESTORE_LOCAL(old_comppad);
- PL_curcop = ocurcop;
- PL_regeol = saved_regeol;
- if (!logical) {
- /* /(?{...})/ */
- sv_setsv(save_scalar(PL_replgv), ret);
- break;
- }
- }
- if (logical == 2) { /* Postponed subexpression: /(??{...})/ */
- logical = 0;
- {
- /* extract RE object from returned value; compiling if
- * necessary */
- MAGIC *mg = NULL;
- REGEXP *rx = NULL;
-
- if (SvROK(ret)) {
- SV *const sv = SvRV(ret);
-
- if (SvTYPE(sv) == SVt_REGEXP) {
- rx = (REGEXP*) sv;
- } else if (SvSMAGICAL(sv)) {
- mg = mg_find(sv, PERL_MAGIC_qr);
- assert(mg);
- }
- } else if (SvTYPE(ret) == SVt_REGEXP) {
- rx = (REGEXP*) ret;
- } else if (SvSMAGICAL(ret)) {
- if (SvGMAGICAL(ret)) {
- /* I don't believe that there is ever qr magic
- here. */
- assert(!mg_find(ret, PERL_MAGIC_qr));
- sv_unmagic(ret, PERL_MAGIC_qr);
- }
- else {
- mg = mg_find(ret, PERL_MAGIC_qr);
- /* testing suggests mg only ends up non-NULL for
- scalars who were upgraded and compiled in the
- else block below. In turn, this is only
- triggered in the "postponed utf8 string" tests
- in t/op/pat.t */
- }
- }
-
- if (mg) {
- rx = (REGEXP *) mg->mg_obj; /*XXX:dmq*/
- assert(rx);
- }
- if (rx) {
- rx = reg_temp_copy(rx);
- }
- else {
- U32 pm_flags = 0;
- const I32 osize = PL_regsize;
-
- if (DO_UTF8(ret)) {
- assert (SvUTF8(ret));
- } else if (SvUTF8(ret)) {
- /* Not doing UTF-8, despite what the SV says. Is
- this only if we're trapped in use 'bytes'? */
- /* Make a copy of the octet sequence, but without
- the flag on, as the compiler now honours the
- SvUTF8 flag on ret. */
- STRLEN len;
- const char *const p = SvPV(ret, len);
- ret = newSVpvn_flags(p, len, SVs_TEMP);
- }
- rx = CALLREGCOMP(ret, pm_flags);
- if (!(SvFLAGS(ret)
- & (SVs_TEMP | SVs_PADTMP | SVf_READONLY
- | SVs_GMG))) {
- /* This isn't a first class regexp. Instead, it's
- caching a regexp onto an existing, Perl visible
- scalar. */
- sv_magic(ret, MUTABLE_SV(rx), PERL_MAGIC_qr, 0, 0);
- }
- PL_regsize = osize;
- }
- re_sv = rx;
- re = (struct regexp *)SvANY(rx);
- }
- RXp_MATCH_COPIED_off(re);
- re->subbeg = rex->subbeg;
- re->sublen = rex->sublen;
- rei = RXi_GET(re);
- DEBUG_EXECUTE_r(
- debug_start_match(re_sv, do_utf8, locinput, PL_regeol,
- "Matching embedded");
- );
- startpoint = rei->program + 1;
- ST.close_paren = 0; /* only used for GOSUB */
- /* borrowed from regtry */
- if (PL_reg_start_tmpl <= re->nparens) {
- PL_reg_start_tmpl = re->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- eval_recurse_doit: /* Share code with GOSUB below this line */
- /* run the pattern returned from (??{...}) */
- ST.cp = regcppush(0); /* Save *all* the positions. */
- REGCP_SET(ST.lastcp);
-
- PL_regoffs = re->offs; /* essentially NOOP on GOSUB */
-
- /* see regtry, specifically PL_reglast(?:close)?paren is a pointer! (i dont know why) :dmq */
- PL_reglastparen = &re->lastparen;
- PL_reglastcloseparen = &re->lastcloseparen;
- re->lastparen = 0;
- re->lastcloseparen = 0;
-
- PL_reginput = locinput;
- PL_regsize = 0;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
-
- ST.toggle_reg_flags = PL_reg_flags;
- if (RX_UTF8(re_sv))
- PL_reg_flags |= RF_utf8;
- else
- PL_reg_flags &= ~RF_utf8;
- ST.toggle_reg_flags ^= PL_reg_flags; /* diff of old and new */
-
- ST.prev_rex = rex_sv;
- ST.prev_curlyx = cur_curlyx;
- SETREX(rex_sv,re_sv);
- rex = re;
- rexi = rei;
- cur_curlyx = NULL;
- ST.B = next;
- ST.prev_eval = cur_eval;
- cur_eval = st;
- /* now continue from first node in postoned RE */
- PUSH_YES_STATE_GOTO(EVAL_AB, startpoint);
- /* NOTREACHED */
- }
- /* logical is 1, /(?(?{...})X|Y)/ */
- sw = (bool)SvTRUE(ret);
- logical = 0;
- break;
- }
-
- case EVAL_AB: /* cleanup after a successful (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- regcpblow(ST.cp);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
- /* also update PL_regoffs */
- PL_regoffs = rex->offs;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayYES;
-
-
- case EVAL_AB_fail: /* unsuccessfully ran A or B in (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- PL_reginput = locinput;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayNO_SILENT;
-#undef ST
-
- case OPEN:
- n = ARG(scan); /* which paren pair */
- PL_reg_start_tmp[n] = locinput;
- if (n > PL_regsize)
- PL_regsize = n;
- lastopen = n;
- break;
- case CLOSE:
- n = ARG(scan); /* which paren pair */
- PL_regoffs[n].start = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if (cur_eval && cur_eval->u.eval.close_paren == n) {
- goto fake_end;
- }
- break;
- case ACCEPT:
- if (ARG(scan)){
- regnode *cursor;
- for (cursor=scan;
- cursor && OP(cursor)!=END;
- cursor=regnext(cursor))
- {
- if ( OP(cursor)==CLOSE ){
- n = ARG(cursor);
- if ( n <= lastopen ) {
- PL_regoffs[n].start
- = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if ( n == ARG(scan) || (cur_eval &&
- cur_eval->u.eval.close_paren == n))
- break;
- }
- }
- }
- }
- goto fake_end;
- /*NOTREACHED*/
- case GROUPP:
- n = ARG(scan); /* which paren pair */
- sw = (bool)(*PL_reglastparen >= n && PL_regoffs[n].end != -1);
- break;
- case NGROUPP:
- /* reg_check_named_buff_matched returns 0 for no match */
- sw = (bool)(0 < reg_check_named_buff_matched(rex,scan));
- break;
- case INSUBP:
- n = ARG(scan);
- sw = (cur_eval && (!n || cur_eval->u.eval.close_paren == n));
- break;
- case DEFINEP:
- sw = 0;
- break;
- case IFTHEN:
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (sw)
- next = NEXTOPER(NEXTOPER(scan));
- else {
- next = scan + ARG(scan);
- if (OP(next) == IFTHEN) /* Fake one. */
- next = NEXTOPER(NEXTOPER(next));
- }
- break;
- case LOGICAL:
- logical = scan->flags;
- break;
-
-/*******************************************************************
-
-The CURLYX/WHILEM pair of ops handle the most generic case of the /A*B/
-pattern, where A and B are subpatterns. (For simple A, CURLYM or
-STAR/PLUS/CURLY/CURLYN are used instead.)
-
-A*B is compiled as <CURLYX><A><WHILEM><B>
-
-On entry to the subpattern, CURLYX is called. This pushes a CURLYX
-state, which contains the current count, initialised to -1. It also sets
-cur_curlyx to point to this state, with any previous value saved in the
-state block.
-
-CURLYX then jumps straight to the WHILEM op, rather than executing A,
-since the pattern may possibly match zero times (i.e. it's a while {} loop
-rather than a do {} while loop).
-
-Each entry to WHILEM represents a successful match of A. The count in the
-CURLYX block is incremented, another WHILEM state is pushed, and execution
-passes to A or B depending on greediness and the current count.
-
-For example, if matching against the string a1a2a3b (where the aN are
-substrings that match /A/), then the match progresses as follows: (the
-pushed states are interspersed with the bits of strings matched so far):
-
- <CURLYX cnt=-1>
- <CURLYX cnt=0><WHILEM>
- <CURLYX cnt=1><WHILEM> a1 <WHILEM>
- <CURLYX cnt=2><WHILEM> a1 <WHILEM> a2 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> b
-
-(Contrast this with something like CURLYM, which maintains only a single
-backtrack state:
-
- <CURLYM cnt=0> a1
- a1 <CURLYM cnt=1> a2
- a1 a2 <CURLYM cnt=2> a3
- a1 a2 a3 <CURLYM cnt=3> b
-)
-
-Each WHILEM state block marks a point to backtrack to upon partial failure
-of A or B, and also contains some minor state data related to that
-iteration. The CURLYX block, pointed to by cur_curlyx, contains the
-overall state, such as the count, and pointers to the A and B ops.
-
-This is complicated slightly by nested CURLYX/WHILEM's. Since cur_curlyx
-must always point to the *current* CURLYX block, the rules are:
-
-When executing CURLYX, save the old cur_curlyx in the CURLYX state block,
-and set cur_curlyx to point the new block.
-
-When popping the CURLYX block after a successful or unsuccessful match,
-restore the previous cur_curlyx.
-
-When WHILEM is about to execute B, save the current cur_curlyx, and set it
-to the outer one saved in the CURLYX block.
-
-When popping the WHILEM block after a successful or unsuccessful B match,
-restore the previous cur_curlyx.
-
-Here's an example for the pattern (AI* BI)*BO
-I and O refer to inner and outer, C and W refer to CURLYX and WHILEM:
-
-cur_
-curlyx backtrack stack
------- ---------------
-NULL
-CO <CO prev=NULL> <WO>
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-NULL <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi <WO prev=CO> bo
-
-At this point the pattern succeeds, and we work back down the stack to
-clean up, restoring as we go:
-
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO>
-NULL
-
-*******************************************************************/
-
-#define ST st->u.curlyx
-
- case CURLYX: /* start of /A*B/ (for complex A) */
- {
- /* No need to save/restore up to this paren */
- I32 parenfloor = scan->flags;
-
- assert(next); /* keep Coverity happy */
- if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */
- next += ARG(next);
-
- /* XXXX Probably it is better to teach regpush to support
- parenfloor > PL_regsize... */
- if (parenfloor > (I32)*PL_reglastparen)
- parenfloor = *PL_reglastparen; /* Pessimization... */
-
- ST.prev_curlyx= cur_curlyx;
- cur_curlyx = st;
- ST.cp = PL_savestack_ix;
-
- /* these fields contain the state of the current curly.
- * they are accessed by subsequent WHILEMs */
- ST.parenfloor = parenfloor;
- ST.min = ARG1(scan);
- ST.max = ARG2(scan);
- ST.A = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- ST.B = next;
- ST.minmod = minmod;
- minmod = 0;
- ST.count = -1; /* this will be updated by WHILEM */
- ST.lastloc = NULL; /* this will be updated by WHILEM */
-
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYX_end, PREVOPER(next));
- /* NOTREACHED */
- }
-
- case CURLYX_end: /* just finished matching all of A*B */
- cur_curlyx = ST.prev_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case CURLYX_end_fail: /* just failed to match all of A*B */
- regcpblow(ST.cp);
- cur_curlyx = ST.prev_curlyx;
- sayNO;
- /* NOTREACHED */
-
-
-#undef ST
-#define ST st->u.whilem
-
- case WHILEM: /* just matched an A in /A*B/ (for complex A) */
- {
- /* see the discussion above about CURLYX/WHILEM */
- I32 n;
- assert(cur_curlyx); /* keep Coverity happy */
- n = ++cur_curlyx->u.curlyx.count; /* how many A's matched */
- ST.save_lastloc = cur_curlyx->u.curlyx.lastloc;
- ST.cache_offset = 0;
- ST.cache_mask = 0;
-
- PL_reginput = locinput;
-
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: matched %ld out of %ld..%ld\n",
- REPORT_CODE_OFF+depth*2, "", (long)n,
- (long)cur_curlyx->u.curlyx.min,
- (long)cur_curlyx->u.curlyx.max)
- );
-
- /* First just match a string of min A's. */
-
- if (n < cur_curlyx->u.curlyx.min) {
- cur_curlyx->u.curlyx.lastloc = locinput;
- PUSH_STATE_GOTO(WHILEM_A_pre, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
-
- /* If degenerate A matches "", assume A done. */
-
- if (locinput == cur_curlyx->u.curlyx.lastloc) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: empty match detected, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- goto do_whilem_B_max;
- }
-
- /* super-linear cache processing */
-
- if (scan->flags) {
-
- if (!PL_reg_maxiter) {
- /* start the countdown: Postpone detection until we
- * know the match is not *that* much linear. */
- PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4);
- /* possible overflow for long strings and many CURLYX's */
- if (PL_reg_maxiter < 0)
- PL_reg_maxiter = I32_MAX;
- PL_reg_leftiter = PL_reg_maxiter;
- }
-
- if (PL_reg_leftiter-- == 0) {
- /* initialise cache */
- const I32 size = (PL_reg_maxiter + 7)/8;
- if (PL_reg_poscache) {
- if ((I32)PL_reg_poscache_size < size) {
- Renew(PL_reg_poscache, size, char);
- PL_reg_poscache_size = size;
- }
- Zero(PL_reg_poscache, size, char);
- }
- else {
- PL_reg_poscache_size = size;
- Newxz(PL_reg_poscache, size, char);
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%swhilem: Detected a super-linear match, switching on caching%s...\n",
- PL_colors[4], PL_colors[5])
- );
- }
-
- if (PL_reg_leftiter < 0) {
- /* have we already failed at this position? */
- I32 offset, mask;
- offset = (scan->flags & 0xf) - 1
- + (locinput - PL_bostr) * (scan->flags>>4);
- mask = 1 << (offset % 8);
- offset /= 8;
- if (PL_reg_poscache[offset] & mask) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: (cache) already tried at this position...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- sayNO; /* cache records failure */
- }
- ST.cache_offset = offset;
- ST.cache_mask = mask;
- }
- }
-
- /* Prefer B over A for minimal matching. */
-
- if (cur_curlyx->u.curlyx.minmod) {
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- ST.cp = regcppush(ST.save_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_YES_STATE_GOTO(WHILEM_B_min, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
- }
-
- /* Prefer A over B for maximal matching. */
-
- if (n < cur_curlyx->u.curlyx.max) { /* More greed allowed? */
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- cur_curlyx->u.curlyx.lastloc = locinput;
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_max, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
- goto do_whilem_B_max;
- }
- /* NOTREACHED */
-
- case WHILEM_B_min: /* just matched B in a minimal match */
- case WHILEM_B_max: /* just matched B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case WHILEM_B_max_fail: /* just failed to match B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_min_fail: /* just failed to match A in a minimal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- /* FALL THROUGH */
- case WHILEM_A_pre_fail: /* just failed to match even minimal A */
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_max_fail: /* just failed to match A in a maximal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex); /* Restore some previous $<digit>s? */
- PL_reginput = locinput;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s whilem: failed, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- do_whilem_B_max:
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
-
- /* now try B */
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- PUSH_YES_STATE_GOTO(WHILEM_B_max, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
-
- case WHILEM_B_min_fail: /* just failed to match B in a minimal match */
- cur_curlyx = ST.save_curlyx;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
-
- if (cur_curlyx->u.curlyx.count >= cur_curlyx->u.curlyx.max) {
- /* Maximum greed exceeded */
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP),
- "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s trying longer...\n", REPORT_CODE_OFF+depth*2, "")
- );
- /* Try grabbing another A and see if it helps. */
- PL_reginput = locinput;
- cur_curlyx->u.curlyx.lastloc = locinput;
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_min, ST.save_curlyx->u.curlyx.A);
- /* NOTREACHED */
-
-#undef ST
-#define ST st->u.branch
-
- case BRANCHJ: /* /(...|A|...)/ with long next pointer */
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- scan = NEXTOPER(scan);
- /* FALL THROUGH */
-
- case BRANCH: /* /(...|A|...)/ */
- scan = NEXTOPER(scan); /* scan now points to inner node */
- ST.lastparen = *PL_reglastparen;
- ST.next_branch = next;
- REGCP_SET(ST.cp);
- PL_reginput = locinput;
-
- /* Now go into the branch */
- if (has_cutgroup) {
- PUSH_YES_STATE_GOTO(BRANCH_next, scan);
- } else {
- PUSH_STATE_GOTO(BRANCH_next, scan);
- }
- /* NOTREACHED */
- case CUTGROUP:
- PL_reginput = locinput;
- sv_yes_mark = st->u.mark.mark_name = scan->flags ? NULL :
- MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(CUTGROUP_next,next);
- /* NOTREACHED */
- case CUTGROUP_next_fail:
- do_cutgroup = 1;
- no_final = 1;
- if (st->u.mark.mark_name)
- sv_commit = st->u.mark.mark_name;
- sayNO;
- /* NOTREACHED */
- case BRANCH_next:
- sayYES;
- /* NOTREACHED */
- case BRANCH_next_fail: /* that branch failed; try the next, if any */
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- /*dmq: *PL_reglastcloseparen = n; */
- scan = ST.next_branch;
- /* no more branches? */
- if (!scan || (OP(scan) != BRANCH && OP(scan) != BRANCHJ)) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sBRANCH failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- sayNO_SILENT;
- }
- continue; /* execute next BRANCH[J] op */
- /* NOTREACHED */
-
- case MINMOD:
- minmod = 1;
- break;
-
-#undef ST
-#define ST st->u.curlym
-
- case CURLYM: /* /A{m,n}B/ where A is fixed-length */
-
- /* This is an optimisation of CURLYX that enables us to push
- * only a single backtracking state, no matter how many matches
- * there are in {m,n}. It relies on the pattern being constant
- * length, with no parens to influence future backrefs
- */
-
- ST.me = scan;
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
-
- /* if paren positive, emulate an OPEN/CLOSE around A */
- if (ST.me->flags) {
- U32 paren = ST.me->flags;
- if (paren > PL_regsize)
- PL_regsize = paren;
- if (paren > *PL_reglastparen)
- *PL_reglastparen = paren;
- scan += NEXT_OFF(scan); /* Skip former OPEN. */
- }
- ST.A = scan;
- ST.B = next;
- ST.alen = 0;
- ST.count = 0;
- ST.minmod = minmod;
- minmod = 0;
- ST.c1 = CHRTEST_UNINIT;
- REGCP_SET(ST.cp);
-
- if (!(ST.minmod ? ARG1(ST.me) : ARG2(ST.me))) /* min/max */
- goto curlym_do_B;
-
- curlym_do_A: /* execute the A in /A{m,n}B/ */
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYM_A, ST.A); /* match A */
- /* NOTREACHED */
-
- case CURLYM_A: /* we've just matched an A */
- locinput = st->locinput;
- nextchr = UCHARAT(locinput);
-
- ST.count++;
- /* after first match, determine A's length: u.curlym.alen */
- if (ST.count == 1) {
- if (PL_reg_match_utf8) {
- char *s = locinput;
- while (s < PL_reginput) {
- ST.alen++;
- s += UTF8SKIP(s);
- }
- }
- else {
- ST.alen = PL_reginput - locinput;
- }
- if (ST.alen == 0)
- ST.count = ST.minmod ? ARG1(ST.me) : ARG2(ST.me);
- }
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM now matched %"IVdf" times, len=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)), "",
- (IV) ST.count, (IV)ST.alen)
- );
-
- locinput = PL_reginput;
-
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- goto fake_end;
-
- {
- I32 max = (ST.minmod ? ARG1(ST.me) : ARG2(ST.me));
- if ( max == REG_INFTY || ST.count < max )
- goto curlym_do_A; /* try to match another A */
- }
- goto curlym_do_B; /* try to match B */
-
- case CURLYM_A_fail: /* just failed to match an A */
- REGCP_UNWIND(ST.cp);
-
- if (ST.minmod || ST.count < ARG1(ST.me) /* min*/
- || (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags))
- sayNO;
-
- curlym_do_B: /* execute the B in /A{m,n}B/ */
- PL_reginput = locinput;
- if (ST.c1 == CHRTEST_UNINIT) {
- /* calculate c1 and c2 for possible match of 1st char
- * following curly */
- ST.c1 = ST.c2 = CHRTEST_VOID;
- if (HAS_TEXT(ST.B) || JUMPABLE(ST.B)) {
- regnode *text_node = ST.B;
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
- /* this used to be
-
- (HAS_TEXT(text_node) && PL_regkind[OP(text_node)] == EXACT)
-
- But the former is redundant in light of the latter.
-
- if this changes back then the macro for
- IS_TEXT and friends need to change.
- */
- if (PL_regkind[OP(text_node)] == EXACT)
- {
-
- ST.c1 = (U8)*STRING(text_node);
- ST.c2 =
- (IS_TEXTF(text_node))
- ? PL_fold[ST.c1]
- : (IS_TEXTFL(text_node))
- ? PL_fold_locale[ST.c1]
- : ST.c1;
- }
- }
- }
-
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM trying tail with matches=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)),
- "", (IV)ST.count)
- );
- if (ST.c1 != CHRTEST_VOID
- && UCHARAT(PL_reginput) != ST.c1
- && UCHARAT(PL_reginput) != ST.c2)
- {
- /* simulate B failing */
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM Fast bail c1=%"IVdf" c2=%"IVdf"\n",
- (int)(REPORT_CODE_OFF+(depth*2)),"",
- (IV)ST.c1,(IV)ST.c2
- ));
- state_num = CURLYM_B_fail;
- goto reenter_switch;
- }
-
- if (ST.me->flags) {
- /* mark current A as captured */
- I32 paren = ST.me->flags;
- if (ST.count) {
- PL_regoffs[paren].start
- = HOPc(PL_reginput, -ST.alen) - PL_bostr;
- PL_regoffs[paren].end = PL_reginput - PL_bostr;
- /*dmq: *PL_reglastcloseparen = paren; */
- }
- else
- PL_regoffs[paren].end = -1;
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- {
- if (ST.count)
- goto fake_end;
- else
- sayNO;
- }
- }
-
- PUSH_STATE_GOTO(CURLYM_B, ST.B); /* match B */
- /* NOTREACHED */
-
- case CURLYM_B_fail: /* just failed to match a B */
- REGCP_UNWIND(ST.cp);
- if (ST.minmod) {
- I32 max = ARG2(ST.me);
- if (max != REG_INFTY && ST.count == max)
- sayNO;
- goto curlym_do_A; /* try to match a further A */
- }
- /* backtrack one A */
- if (ST.count == ARG1(ST.me) /* min */)
- sayNO;
- ST.count--;
- locinput = HOPc(locinput, -ST.alen);
- goto curlym_do_B; /* try to match B */
-
-#undef ST
-#define ST st->u.curly
-
-#define CURLY_SETPAREN(paren, success) \
- if (paren) { \
- if (success) { \
- PL_regoffs[paren].start = HOPc(locinput, -1) - PL_bostr; \
- PL_regoffs[paren].end = locinput - PL_bostr; \
- *PL_reglastcloseparen = paren; \
- } \
- else \
- PL_regoffs[paren].end = -1; \
- }
-
- case STAR: /* /A*B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 0;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case PLUS: /* /A+B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 1;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case CURLYN: /* /(A){m,n}B/ where A is width 1 */
- ST.paren = scan->flags; /* Which paren to set */
- if (ST.paren > PL_regsize)
- PL_regsize = ST.paren;
- if (ST.paren > *PL_reglastparen)
- *PL_reglastparen = ST.paren;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- ST.min=1;
- ST.max=1;
- }
- scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE);
- goto repeat;
- case CURLY: /* /A{m,n}B/ where A is width 1 */
- ST.paren = 0;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
- repeat:
- /*
- * Lookahead to avoid useless match attempts
- * when we know what character comes next.
- *
- * Used to only do .*x and .*?x, but now it allows
- * for )'s, ('s and (?{ ... })'s to be in the way
- * of the quantifier and the EXACT-like node. -- japhy
- */
-
- if (ST.min > ST.max) /* XXX make this a compile-time check? */
- sayNO;
- if (HAS_TEXT(next) || JUMPABLE(next)) {
- U8 *s;
- regnode *text_node = next;
-
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
-
- if (! HAS_TEXT(text_node))
- ST.c1 = ST.c2 = CHRTEST_VOID;
- else {
- if ( PL_regkind[OP(text_node)] != EXACT ) {
- ST.c1 = ST.c2 = CHRTEST_VOID;
- goto assume_ok_easy;
- }
- else
- s = (U8*)STRING(text_node);
-
- /* Currently we only get here when
-
- PL_rekind[OP(text_node)] == EXACT
-
- if this changes back then the macro for IS_TEXT and
- friends need to change. */
- if (!UTF) {
- ST.c2 = ST.c1 = *s;
- if (IS_TEXTF(text_node))
- ST.c2 = PL_fold[ST.c1];
- else if (IS_TEXTFL(text_node))
- ST.c2 = PL_fold_locale[ST.c1];
- }
- else { /* UTF */
- if (IS_TEXTF(text_node)) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- to_utf8_lower((U8*)s, tmpbuf1, &ulen1);
- to_utf8_upper((U8*)s, tmpbuf2, &ulen2);
-#ifdef EBCDIC
- ST.c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
- ST.c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
-#else
- ST.c1 = utf8n_to_uvuni(tmpbuf1, UTF8_MAXBYTES, 0,
- uniflags);
- ST.c2 = utf8n_to_uvuni(tmpbuf2, UTF8_MAXBYTES, 0,
- uniflags);
-#endif
- }
- else {
- ST.c2 = ST.c1 = utf8n_to_uvchr(s, UTF8_MAXBYTES, 0,
- uniflags);
- }
- }
- }
- }
- else
- ST.c1 = ST.c2 = CHRTEST_VOID;
- assume_ok_easy:
-
- ST.A = scan;
- ST.B = next;
- PL_reginput = locinput;
- if (minmod) {
- minmod = 0;
- if (ST.min && regrepeat(rex, ST.A, ST.min, depth) < ST.min)
- sayNO;
- ST.count = ST.min;
- locinput = PL_reginput;
- REGCP_SET(ST.cp);
- if (ST.c1 == CHRTEST_VOID)
- goto curly_try_B_min;
-
- ST.oldloc = locinput;
-
- /* set ST.maxpos to the furthest point along the
- * string that could possibly match */
- if (ST.max == REG_INFTY) {
- ST.maxpos = PL_regeol - 1;
- if (do_utf8)
- while (UTF8_IS_CONTINUATION(*(U8*)ST.maxpos))
- ST.maxpos--;
- }
- else if (do_utf8) {
- int m = ST.max - ST.min;
- for (ST.maxpos = locinput;
- m >0 && ST.maxpos + UTF8SKIP(ST.maxpos) <= PL_regeol; m--)
- ST.maxpos += UTF8SKIP(ST.maxpos);
- }
- else {
- ST.maxpos = locinput + ST.max - ST.min;
- if (ST.maxpos >= PL_regeol)
- ST.maxpos = PL_regeol - 1;
- }
- goto curly_try_B_min_known;
-
- }
- else {
- ST.count = regrepeat(rex, ST.A, ST.max, depth);
- locinput = PL_reginput;
- if (ST.count < ST.min)
- sayNO;
- if ((ST.count > ST.min)
- && (PL_regkind[OP(ST.B)] == EOL) && (OP(ST.B) != MEOL))
- {
- /* A{m,n} must come at the end of the string, there's
- * no point in backing off ... */
- ST.min = ST.count;
- /* ...except that $ and \Z can match before *and* after
- newline at the end. Consider "\n\n" =~ /\n+\Z\n/.
- We may back off by one in this case. */
- if (UCHARAT(PL_reginput - 1) == '\n' && OP(ST.B) != EOS)
- ST.min--;
- }
- REGCP_SET(ST.cp);
- goto curly_try_B_max;
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_known_fail:
- /* failed to find B in a non-greedy match where c1,c2 valid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- PL_reginput = locinput; /* Could be reset... */
- REGCP_UNWIND(ST.cp);
- /* Couldn't or didn't -- move forward. */
- ST.oldloc = locinput;
- if (do_utf8)
- locinput += UTF8SKIP(locinput);
- else
- locinput++;
- ST.count++;
- curly_try_B_min_known:
- /* find the next place where 'B' could work, then call B */
- {
- int n;
- if (do_utf8) {
- n = (ST.oldloc == locinput) ? 0 : 1;
- if (ST.c1 == ST.c2) {
- STRLEN len;
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos &&
- utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags) != (UV)ST.c1) {
- locinput += len;
- n++;
- }
- }
- else {
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos) {
- STRLEN len;
- const UV c = utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags);
- if (c == (UV)ST.c1 || c == (UV)ST.c2)
- break;
- locinput += len;
- n++;
- }
- }
- }
- else {
- if (ST.c1 == ST.c2) {
- while (locinput <= ST.maxpos &&
- UCHARAT(locinput) != ST.c1)
- locinput++;
- }
- else {
- while (locinput <= ST.maxpos
- && UCHARAT(locinput) != ST.c1
- && UCHARAT(locinput) != ST.c2)
- locinput++;
- }
- n = locinput - ST.oldloc;
- }
- if (locinput > ST.maxpos)
- sayNO;
- /* PL_reginput == oldloc now */
- if (n) {
- ST.count += n;
- if (regrepeat(rex, ST.A, n, depth) < n)
- sayNO;
- }
- PL_reginput = locinput;
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min_known, ST.B);
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_fail:
- /* failed to find B in a non-greedy match where c1,c2 invalid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* failed -- move forward one */
- PL_reginput = locinput;
- if (regrepeat(rex, ST.A, 1, depth)) {
- ST.count++;
- locinput = PL_reginput;
- if (ST.count <= ST.max || (ST.max == REG_INFTY &&
- ST.count > 0)) /* count overflow ? */
- {
- curly_try_B_min:
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min, ST.B);
- }
- }
- sayNO;
- /* NOTREACHED */
-
-
- curly_try_B_max:
- /* a successful greedy match: now try to match B */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- {
- UV c = 0;
- if (ST.c1 != CHRTEST_VOID)
- c = do_utf8 ? utf8n_to_uvchr((U8*)PL_reginput,
- UTF8_MAXBYTES, 0, uniflags)
- : (UV) UCHARAT(PL_reginput);
- /* If it could work, try it. */
- if (ST.c1 == CHRTEST_VOID || c == (UV)ST.c1 || c == (UV)ST.c2) {
- CURLY_SETPAREN(ST.paren, ST.count);
- PUSH_STATE_GOTO(CURLY_B_max, ST.B);
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case CURLY_B_max_fail:
- /* failed to find B in a greedy match */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* back up. */
- if (--ST.count < ST.min)
- sayNO;
- PL_reginput = locinput = HOPc(locinput, -1);
- goto curly_try_B_max;
-
-#undef ST
-
- case END:
- fake_end:
- if (cur_eval) {
- /* we've just finished A in /(??{A})B/; now continue with B */
- I32 tmpix;
- st->u.eval.toggle_reg_flags
- = cur_eval->u.eval.toggle_reg_flags;
- PL_reg_flags ^= st->u.eval.toggle_reg_flags;
-
- st->u.eval.prev_rex = rex_sv; /* inner */
- SETREX(rex_sv,cur_eval->u.eval.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- cur_curlyx = cur_eval->u.eval.prev_curlyx;
- ReREFCNT_inc(rex_sv);
- st->u.eval.cp = regcppush(0); /* Save *all* the positions. */
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- REGCP_SET(st->u.eval.lastcp);
- PL_reginput = locinput;
-
- /* Restore parens of the outer rex without popping the
- * savestack */
- tmpix = PL_savestack_ix;
- PL_savestack_ix = cur_eval->u.eval.lastcp;
- regcppop(rex);
- PL_savestack_ix = tmpix;
-
- st->u.eval.prev_eval = cur_eval;
- cur_eval = cur_eval->u.eval.prev_eval;
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log, "%*s EVAL trying tail ... %"UVxf"\n",
- REPORT_CODE_OFF+depth*2, "",PTR2UV(cur_eval)););
- if ( nochange_depth )
- nochange_depth--;
-
- PUSH_YES_STATE_GOTO(EVAL_AB,
- st->u.eval.prev_eval->u.eval.B); /* match B */
- }
-
- if (locinput < reginfo->till) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n",
- PL_colors[4],
- (long)(locinput - PL_reg_starttry),
- (long)(reginfo->till - PL_reg_starttry),
- PL_colors[5]));
-
- sayNO_SILENT; /* Cannot match: too short. */
- }
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
- case SUCCEED: /* successful SUSPEND/UNLESSM/IFMATCH/CURLYM */
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %ssubpattern success...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]));
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
-#undef ST
-#define ST st->u.ifmatch
-
- case SUSPEND: /* (?>A) */
- ST.wanted = 1;
- PL_reginput = locinput;
- goto do_ifmatch;
-
- case UNLESSM: /* -ve lookaround: (?!A), or with flags, (?<!A) */
- ST.wanted = 0;
- goto ifmatch_trivial_fail_test;
-
- case IFMATCH: /* +ve lookaround: (?=A), or with flags, (?<=A) */
- ST.wanted = 1;
- ifmatch_trivial_fail_test:
- if (scan->flags) {
- char * const s = HOPBACKc(locinput, scan->flags);
- if (!s) {
- /* trivial fail */
- if (logical) {
- logical = 0;
- sw = 1 - (bool)ST.wanted;
- }
- else if (ST.wanted)
- sayNO;
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- }
- PL_reginput = s;
- }
- else
- PL_reginput = locinput;
-
- do_ifmatch:
- ST.me = scan;
- ST.logical = logical;
- logical = 0; /* XXX: reset state of logical once it has been saved into ST */
-
- /* execute body of (?...A) */
- PUSH_YES_STATE_GOTO(IFMATCH_A, NEXTOPER(NEXTOPER(scan)));
- /* NOTREACHED */
-
- case IFMATCH_A_fail: /* body of (?...A) failed */
- ST.wanted = !ST.wanted;
- /* FALL THROUGH */
-
- case IFMATCH_A: /* body of (?...A) succeeded */
- if (ST.logical) {
- sw = (bool)ST.wanted;
- }
- else if (!ST.wanted)
- sayNO;
-
- if (OP(ST.me) == SUSPEND)
- locinput = PL_reginput;
- else {
- locinput = PL_reginput = st->locinput;
- nextchr = UCHARAT(locinput);
- }
- scan = ST.me + ARG(ST.me);
- if (scan == ST.me)
- scan = NULL;
- continue; /* execute B */
-
-#undef ST
-
- case LONGJMP:
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- case COMMIT:
- reginfo->cutpoint = PL_regeol;
- /* FALLTHROUGH */
- case PRUNE:
- PL_reginput = locinput;
- if (!scan->flags)
- sv_yes_mark = sv_commit = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(COMMIT_next,next);
- /* NOTREACHED */
- case COMMIT_next_fail:
- no_final = 1;
- /* FALLTHROUGH */
- case OPFAIL:
- sayNO;
- /* NOTREACHED */
-
-#define ST st->u.mark
- case MARKPOINT:
- ST.prev_mark = mark_state;
- ST.mark_name = sv_commit = sv_yes_mark
- = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- mark_state = st;
- ST.mark_loc = PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(MARKPOINT_next,next);
- /* NOTREACHED */
- case MARKPOINT_next:
- mark_state = ST.prev_mark;
- sayYES;
- /* NOTREACHED */
- case MARKPOINT_next_fail:
- if (popmark && sv_eq(ST.mark_name,popmark))
- {
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- popmark = NULL; /* we found our mark */
- sv_commit = ST.mark_name;
-
- DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,
- "%*s %ssetting cutpoint to mark:%"SVf"...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], SVfARG(sv_commit), PL_colors[5]);
- });
- }
- mark_state = ST.prev_mark;
- sv_yes_mark = mark_state ?
- mark_state->u.mark.mark_name : NULL;
- sayNO;
- /* NOTREACHED */
- case SKIP:
- PL_reginput = locinput;
- if (scan->flags) {
- /* (*SKIP) : if we fail we cut here*/
- ST.mark_name = NULL;
- ST.mark_loc = locinput;
- PUSH_STATE_GOTO(SKIP_next,next);
- } else {
- /* (*SKIP:NAME) : if there is a (*MARK:NAME) fail where it was,
- otherwise do nothing. Meaning we need to scan
- */
- regmatch_state *cur = mark_state;
- SV *find = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
-
- while (cur) {
- if ( sv_eq( cur->u.mark.mark_name,
- find ) )
- {
- ST.mark_name = find;
- PUSH_STATE_GOTO( SKIP_next, next );
- }
- cur = cur->u.mark.prev_mark;
- }
- }
- /* Didn't find our (*MARK:NAME) so ignore this (*SKIP:NAME) */
- break;
- case SKIP_next_fail:
- if (ST.mark_name) {
- /* (*CUT:NAME) - Set up to search for the name as we
- collapse the stack*/
- popmark = ST.mark_name;
- } else {
- /* (*CUT) - No name, we cut here.*/
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- /* but we set sv_commit to latest mark_name if there
- is one so they can test to see how things lead to this
- cut */
- if (mark_state)
- sv_commit=mark_state->u.mark.mark_name;
- }
- no_final = 1;
- sayNO;
- /* NOTREACHED */
-#undef ST
- case FOLDCHAR:
- n = ARG(scan);
- if ( n == (U32)what_len_TRICKYFOLD(locinput,do_utf8,ln) ) {
- locinput += ln;
- } else if ( 0xDF == n && !do_utf8 && !UTF ) {
- sayNO;
- } else {
- U8 folded[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const char * const l = locinput;
- char *e = PL_regeol;
- to_uni_fold(n, folded, &foldlen);
-
- if (ibcmp_utf8((const char*) folded, 0, foldlen, 1,
- l, &e, 0, do_utf8)) {
- sayNO;
- }
- locinput = e;
- }
- nextchr = UCHARAT(locinput);
- break;
- case LNBREAK:
- if ((n=is_LNBREAK(locinput,do_utf8))) {
- locinput += n;
- nextchr = UCHARAT(locinput);
- } else
- sayNO;
- break;
-
-#define CASE_CLASS(nAmE) \
- case nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- locinput += n; \
- nextchr = UCHARAT(locinput); \
- } else \
- sayNO; \
- break; \
- case N##nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- sayNO; \
- } else { \
- locinput += UTF8SKIP(locinput); \
- nextchr = UCHARAT(locinput); \
- } \
- break
-
- CASE_CLASS(VERTWS);
- CASE_CLASS(HORIZWS);
-#undef CASE_CLASS
-
- default:
- PerlIO_printf(Perl_error_log, "%"UVxf" %d\n",
- PTR2UV(scan), OP(scan));
- Perl_croak(aTHX_ "regexp memory corruption");
-
- } /* end switch */
-
- /* switch break jumps here */
- scan = next; /* prepare to execute the next op and ... */
- continue; /* ... jump back to the top, reusing st */
- /* NOTREACHED */
-
- push_yes_state:
- /* push a state that backtracks on success */
- st->u.yes.prev_yes_state = yes_state;
- yes_state = st;
- /* FALL THROUGH */
- push_state:
- /* push a new regex state, then continue at scan */
- {
- regmatch_state *newst;
-
- DEBUG_STACK_r({
- regmatch_state *cur = st;
- regmatch_state *curyes = yes_state;
- int curd = depth;
- regmatch_slab *slab = PL_regmatch_slab;
- for (;curd > -1;cur--,curd--) {
- if (cur < SLAB_FIRST(slab)) {
- slab = slab->prev;
- cur = SLAB_LAST(slab);
- }
- PerlIO_printf(Perl_error_log, "%*s#%-3d %-10s %s\n",
- REPORT_CODE_OFF + 2 + depth * 2,"",
- curd, PL_reg_name[cur->resume_state],
- (curyes == cur) ? "yes" : ""
- );
- if (curyes == cur)
- curyes = cur->u.yes.prev_yes_state;
- }
- } else
- DEBUG_STATE_pp("push")
- );
- depth++;
- st->locinput = locinput;
- newst = st+1;
- if (newst > SLAB_LAST(PL_regmatch_slab))
- newst = S_push_slab(aTHX);
- PL_regmatch_state = newst;
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- st = newst;
- continue;
- /* NOTREACHED */
- }
- }
-
- /*
- * We get here only if there's trouble -- normally "case END" is
- * the terminating point.
- */
- Perl_croak(aTHX_ "corrupted regexp pointers");
- /*NOTREACHED*/
- sayNO;
-
-yes:
- if (yes_state) {
- /* we have successfully completed a subexpression, but we must now
- * pop to the state marked by yes_state and continue from there */
- assert(st != yes_state);
-#ifdef DEBUGGING
- while (st != yes_state) {
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- DEBUG_STATE_r({
- if (no_final) {
- DEBUG_STATE_pp("pop (no final)");
- } else {
- DEBUG_STATE_pp("pop (yes)");
- }
- });
- depth--;
- }
-#else
- while (yes_state < SLAB_FIRST(PL_regmatch_slab)
- || yes_state > SLAB_LAST(PL_regmatch_slab))
- {
- /* not in this slab, pop slab */
- depth -= (st - SLAB_FIRST(PL_regmatch_slab) + 1);
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- depth -= (st - yes_state);
-#endif
- st = yes_state;
- yes_state = st->u.yes.prev_yes_state;
- PL_regmatch_state = st;
-
- if (no_final) {
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
- }
- state_num = st->resume_state + no_final;
- goto reenter_switch;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n",
- PL_colors[4], PL_colors[5]));
-
- if (PL_reg_eval_set) {
- /* each successfully executed (?{...}) block does the equivalent of
- * local $^R = do {...}
- * When popping the save stack, all these locals would be undone;
- * bypass this by setting the outermost saved $^R to the latest
- * value */
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- }
- result = 1;
- goto final_exit;
-
-no:
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], PL_colors[5])
- );
-
-no_silent:
- if (no_final) {
- if (yes_state) {
- goto yes;
- } else {
- goto final_exit;
- }
- }
- if (depth) {
- /* there's a previous state to backtrack to */
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- PL_regmatch_state = st;
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
-
- DEBUG_STATE_pp("pop");
- depth--;
- if (yes_state == st)
- yes_state = st->u.yes.prev_yes_state;
-
- state_num = st->resume_state + 1; /* failure = success + 1 */
- goto reenter_switch;
- }
- result = 0;
-
- final_exit:
- if (rex->intflags & PREGf_VERBARG_SEEN) {
- SV *sv_err = get_sv("REGERROR", 1);
- SV *sv_mrk = get_sv("REGMARK", 1);
- if (result) {
- sv_commit = &PL_sv_no;
- if (!sv_yes_mark)
- sv_yes_mark = &PL_sv_yes;
- } else {
- if (!sv_commit)
- sv_commit = &PL_sv_yes;
- sv_yes_mark = &PL_sv_no;
- }
- sv_setsv(sv_err, sv_commit);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- /* clean up; in particular, free all slabs above current one */
- LEAVE_SCOPE(oldsave);
-
- return result;
-}
-
-/*
- - regrepeat - repeatedly match something simple, report how many
- */
-/*
- * [This routine now assumes that it will only match on things of length 1.
- * That was true before, but now we assume scan - reginput is the count,
- * rather than incrementing count on every character. [Er, except utf8.]]
- */
-STATIC I32
-S_regrepeat(pTHX_ const regexp *prog, const regnode *p, I32 max, int depth)
-{
- dVAR;
- register char *scan;
- register I32 c;
- register char *loceol = PL_regeol;
- register I32 hardcount = 0;
- register bool do_utf8 = PL_reg_match_utf8;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_REGREPEAT;
-
- scan = PL_reginput;
- if (max == REG_INFTY)
- max = I32_MAX;
- else if (max < loceol - scan)
- loceol = scan + max;
- switch (OP(p)) {
- case REG_ANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max && *scan != '\n') {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && *scan != '\n')
- scan++;
- }
- break;
- case SANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- }
- else
- scan = loceol;
- break;
- case CANY:
- scan = loceol;
- break;
- case EXACT: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol && UCHARAT(scan) == c)
- scan++;
- break;
- case EXACTF: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c]))
- scan++;
- break;
- case EXACTFL: /* length of string is 1 */
- PL_reg_flags |= RF_tainted;
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c]))
- scan++;
- break;
- case ANYOF:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- reginclass(prog, p, (U8*)scan, 0, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && REGINCLASS(prog, p, (U8*)scan))
- scan++;
- }
- break;
- case ALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM(*scan))
- scan++;
- }
- break;
- case ALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM_LC(*scan))
- scan++;
- }
- break;
- case NALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM(*scan))
- scan++;
- }
- break;
- case NALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM_LC(*scan))
- scan++;
- }
- break;
- case SPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE(*scan))
- scan++;
- }
- break;
- case SPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE_LC(*scan))
- scan++;
- }
- break;
- case NSPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE(*scan))
- scan++;
- }
- break;
- case NSPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE_LC(*scan))
- scan++;
- }
- break;
- case DIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isDIGIT(*scan))
- scan++;
- }
- break;
- case NDIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isDIGIT(*scan))
- scan++;
- }
- case LNBREAK:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_LNBREAK_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- /*
- LNBREAK can match two latin chars, which is ok,
- because we have a null terminated string, but we
- have to use hardcount in this situation
- */
- while (scan < loceol && (c=is_LNBREAK_latin1(scan))) {
- scan+=c;
- hardcount++;
- }
- }
- break;
- case HORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_HORIZWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_HORIZWS_latin1(scan))
- scan++;
- }
- break;
- case NHORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_HORIZWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_HORIZWS_latin1(scan))
- scan++;
-
- }
- break;
- case VERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_VERTWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
- case NVERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_VERTWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
-
- default: /* Called on something of 0 width. */
- break; /* So match right here or not at all. */
- }
-
- if (hardcount)
- c = hardcount;
- else
- c = scan - PL_reginput;
- PL_reginput = scan;
-
- DEBUG_r({
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, p);
- PerlIO_printf(Perl_debug_log,
- "%*s %s can match %"IVdf" times out of %"IVdf"...\n",
- REPORT_CODE_OFF + depth*2, "", SvPVX_const(prop),(IV)c,(IV)max);
- });
- });
-
- return(c);
-}
-
-
-#if !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION)
-/*
-- regclass_swash - prepare the utf8 swash
-*/
-
-SV *
-Perl_regclass_swash(pTHX_ const regexp *prog, register const regnode* node, bool doinit, SV** listsvp, SV **altsvp)
-{
- dVAR;
- SV *sw = NULL;
- SV *si = NULL;
- SV *alt = NULL;
- RXi_GET_DECL(prog,progi);
- const struct reg_data * const data = prog ? progi->data : NULL;
-
- PERL_ARGS_ASSERT_REGCLASS_SWASH;
-
- if (data && data->count) {
- const U32 n = ARG(node);
-
- if (data->what[n] == 's') {
- SV * const rv = MUTABLE_SV(data->data[n]);
- AV * const av = MUTABLE_AV(SvRV(rv));
- SV **const ary = AvARRAY(av);
- SV **a, **b;
-
- /* See the end of regcomp.c:S_regclass() for
- * documentation of these array elements. */
-
- si = *ary;
- a = SvROK(ary[1]) ? &ary[1] : NULL;
- b = SvTYPE(ary[2]) == SVt_PVAV ? &ary[2] : NULL;
-
- if (a)
- sw = *a;
- else if (si && doinit) {
- sw = swash_init("utf8", "", si, 1, 0);
- (void)av_store(av, 1, sw);
- }
- if (b)
- alt = *b;
- }
- }
-
- if (listsvp)
- *listsvp = si;
- if (altsvp)
- *altsvp = alt;
-
- return sw;
-}
-#endif
-
-/*
- - reginclass - determine if a character falls into a character class
-
- The n is the ANYOF regnode, the p is the target string, lenp
- is pointer to the maximum length of how far to go in the p
- (if the lenp is zero, UTF8SKIP(p) is used),
- do_utf8 tells whether the target string is in UTF-8.
-
- */
-
-STATIC bool
-S_reginclass(pTHX_ const regexp *prog, register const regnode *n, register const U8* p, STRLEN* lenp, register bool do_utf8)
-{
- dVAR;
- const char flags = ANYOF_FLAGS(n);
- bool match = FALSE;
- UV c = *p;
- STRLEN len = 0;
- STRLEN plen;
-
- PERL_ARGS_ASSERT_REGINCLASS;
-
- if (do_utf8 && !UTF8_IS_INVARIANT(c)) {
- c = utf8n_to_uvchr(p, UTF8_MAXBYTES, &len,
- (UTF8_ALLOW_DEFAULT & UTF8_ALLOW_ANYUV) | UTF8_CHECK_ONLY);
- /* see [perl #37836] for UTF8_ALLOW_ANYUV */
- if (len == (STRLEN)-1)
- Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)");
- }
-
- plen = lenp ? *lenp : UNISKIP(NATIVE_TO_UNI(c));
- if (do_utf8 || (flags & ANYOF_UNICODE)) {
- if (lenp)
- *lenp = 0;
- if (do_utf8 && !ANYOF_RUNTIME(n)) {
- if (len != (STRLEN)-1 && c < 256 && ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- }
- if (!match && do_utf8 && (flags & ANYOF_UNICODE_ALL) && c >= 256)
- match = TRUE;
- if (!match) {
- AV *av;
- SV * const sw = regclass_swash(prog, n, TRUE, 0, (SV**)&av);
-
- if (sw) {
- U8 * utf8_p;
- if (do_utf8) {
- utf8_p = (U8 *) p;
- } else {
- STRLEN len = 1;
- utf8_p = bytes_to_utf8(p, &len);
- }
- if (swash_fetch(sw, utf8_p, 1))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- if (!match && lenp && av) {
- I32 i;
- for (i = 0; i <= av_len(av); i++) {
- SV* const sv = *av_fetch(av, i, FALSE);
- STRLEN len;
- const char * const s = SvPV_const(sv, len);
- if (len <= plen && memEQ(s, (char*)utf8_p, len)) {
- *lenp = len;
- match = TRUE;
- break;
- }
- }
- }
- if (!match) {
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1];
-
- STRLEN tmplen;
- to_utf8_fold(utf8_p, tmpbuf, &tmplen);
- if (swash_fetch(sw, tmpbuf, 1))
- match = TRUE;
- }
- }
-
- /* If we allocated a string above, free it */
- if (! do_utf8) Safefree(utf8_p);
- }
- }
- if (match && lenp && *lenp == 0)
- *lenp = UNISKIP(NATIVE_TO_UNI(c));
- }
- if (!match && c < 256) {
- if (ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- U8 f;
-
- if (flags & ANYOF_LOCALE) {
- PL_reg_flags |= RF_tainted;
- f = PL_fold_locale[c];
- }
- else
- f = PL_fold[c];
- if (f != c && ANYOF_BITMAP_TEST(n, f))
- match = TRUE;
- }
-
- if (!match && (flags & ANYOF_CLASS)) {
- PL_reg_flags |= RF_tainted;
- if (
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK(c))
- ) /* How's that for a conditional? */
- {
- match = TRUE;
- }
- }
- }
-
- return (flags & ANYOF_INVERT) ? !match : match;
-}
-
-STATIC U8 *
-S_reghop3(U8 *s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-
-#ifdef XXX_dmq
-/* there are a bunch of places where we use two reghop3's that should
- be replaced with this routine. but since thats not done yet
- we ifdef it out - dmq
-*/
-STATIC U8 *
-S_reghop4(U8 *s, I32 off, const U8* llim, const U8* rlim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP4;
-
- if (off >= 0) {
- while (off-- && s < rlim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > llim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > llim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-#endif
-
-STATIC U8 *
-S_reghopmaybe3(U8* s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOPMAYBE3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- if (off >= 0)
- return NULL;
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- if (off <= 0)
- return NULL;
- }
- return s;
-}
-
-static void
-restore_pos(pTHX_ void *arg)
-{
- dVAR;
- regexp * const rex = (regexp *)arg;
- if (PL_reg_eval_set) {
- if (PL_reg_oldsaved) {
- rex->subbeg = PL_reg_oldsaved;
- rex->sublen = PL_reg_oldsavedlen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- rex->saved_copy = PL_nrs;
-#endif
- RXp_MATCH_COPIED_on(rex);
- }
- PL_reg_magic->mg_len = PL_reg_oldpos;
- PL_reg_eval_set = 0;
- PL_curpm = PL_reg_oldcurpm;
- }
-}
-
-STATIC void
-S_to_utf8_substr(pTHX_ register regexp *prog)
-{
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_UTF8_SUBSTR;
-
- do {
- if (prog->substrs->data[i].substr
- && !prog->substrs->data[i].utf8_substr) {
- SV* const sv = newSVsv(prog->substrs->data[i].substr);
- prog->substrs->data[i].utf8_substr = sv;
- sv_utf8_upgrade(sv);
- if (SvVALID(prog->substrs->data[i].substr)) {
- const U8 flags = BmFLAGS(prog->substrs->data[i].substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- /* Whilst this makes the SV technically "invalid" (as its
- buffer is no longer followed by "\0") when fbm_compile()
- adds the "\n" back, a "\0" is restored. */
- }
- fbm_compile(sv, flags);
- }
- if (prog->substrs->data[i].substr == prog->check_substr)
- prog->check_utf8 = sv;
- }
- } while (i--);
-}
-
-STATIC void
-S_to_byte_substr(pTHX_ register regexp *prog)
-{
- dVAR;
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_BYTE_SUBSTR;
-
- do {
- if (prog->substrs->data[i].utf8_substr
- && !prog->substrs->data[i].substr) {
- SV* sv = newSVsv(prog->substrs->data[i].utf8_substr);
- if (sv_utf8_downgrade(sv, TRUE)) {
- if (SvVALID(prog->substrs->data[i].utf8_substr)) {
- const U8 flags
- = BmFLAGS(prog->substrs->data[i].utf8_substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- }
- fbm_compile(sv, flags);
- }
- } else {
- SvREFCNT_dec(sv);
- sv = &PL_sv_undef;
- }
- prog->substrs->data[i].substr = sv;
- if (prog->substrs->data[i].utf8_substr == prog->check_utf8)
- prog->check_substr = sv;
- }
- } while (i--);
-}
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regcomp.c
- */
-
-/*
- * 'A fair jaw-cracker dwarf-language must be.' --Samwise Gamgee
- *
- * [p.285 of _The Lord of the Rings_, II/iii: "The Ring Goes South"]
- */
-
-/* This file contains functions for compiling a regular expression. See
- * also regexec.c which funnily enough, contains functions for executing
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_comp.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
-
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGCOMP_C
-#include "perl.h"
-
-#ifndef PERL_IN_XSUB_RE
-#include "re_defs.h"
-#endif
-
-#define REG_COMP_C
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#ifdef op
-#undef op
-#endif /* op */
-
-#ifdef MSDOS
-# if defined(BUGGY_MSC6)
- /* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */
-# pragma optimize("a",off)
- /* But MSC 6.00A is happy with 'w', for aliases only across function calls*/
-# pragma optimize("w",on )
-# endif /* BUGGY_MSC6 */
-#endif /* MSDOS */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-typedef struct RExC_state_t {
- U32 flags; /* are we folding, multilining? */
- char *precomp; /* uncompiled string. */
- REGEXP *rx_sv; /* The SV that is the regexp. */
- regexp *rx; /* perl core regexp structure */
- regexp_internal *rxi; /* internal data for regexp object pprivate field */
- char *start; /* Start of input for compile */
- char *end; /* End of input for compile */
- char *parse; /* Input-scan pointer. */
- I32 whilem_seen; /* number of WHILEM in this expr */
- regnode *emit_start; /* Start of emitted-code area */
- regnode *emit_bound; /* First regnode outside of the allocated space */
- regnode *emit; /* Code-emit pointer; ®dummy = don't = compiling */
- I32 naughty; /* How bad is this pattern? */
- I32 sawback; /* Did we see \1, ...? */
- U32 seen;
- I32 size; /* Code size. */
- I32 npar; /* Capture buffer count, (OPEN). */
- I32 cpar; /* Capture buffer count, (CLOSE). */
- I32 nestroot; /* root parens we are in - used by accept */
- I32 extralen;
- I32 seen_zerolen;
- I32 seen_evals;
- regnode **open_parens; /* pointers to open parens */
- regnode **close_parens; /* pointers to close parens */
- regnode *opend; /* END node in program */
- I32 utf8; /* whether the pattern is utf8 or not */
- I32 orig_utf8; /* whether the pattern was originally in utf8 */
- /* XXX use this for future optimisation of case
- * where pattern must be upgraded to utf8. */
- HV *charnames; /* cache of named sequences */
- HV *paren_names; /* Paren names */
-
- regnode **recurse; /* Recurse regops */
- I32 recurse_count; /* Number of recurse regops */
-#if ADD_TO_REGEXEC
- char *starttry; /* -Dr: where regtry was called. */
-#define RExC_starttry (pRExC_state->starttry)
-#endif
-#ifdef DEBUGGING
- const char *lastparse;
- I32 lastnum;
- AV *paren_name_list; /* idx -> name */
-#define RExC_lastparse (pRExC_state->lastparse)
-#define RExC_lastnum (pRExC_state->lastnum)
-#define RExC_paren_name_list (pRExC_state->paren_name_list)
-#endif
-} RExC_state_t;
-
-#define RExC_flags (pRExC_state->flags)
-#define RExC_precomp (pRExC_state->precomp)
-#define RExC_rx_sv (pRExC_state->rx_sv)
-#define RExC_rx (pRExC_state->rx)
-#define RExC_rxi (pRExC_state->rxi)
-#define RExC_start (pRExC_state->start)
-#define RExC_end (pRExC_state->end)
-#define RExC_parse (pRExC_state->parse)
-#define RExC_whilem_seen (pRExC_state->whilem_seen)
-#ifdef RE_TRACK_PATTERN_OFFSETS
-#define RExC_offsets (pRExC_state->rxi->u.offsets) /* I am not like the others */
-#endif
-#define RExC_emit (pRExC_state->emit)
-#define RExC_emit_start (pRExC_state->emit_start)
-#define RExC_emit_bound (pRExC_state->emit_bound)
-#define RExC_naughty (pRExC_state->naughty)
-#define RExC_sawback (pRExC_state->sawback)
-#define RExC_seen (pRExC_state->seen)
-#define RExC_size (pRExC_state->size)
-#define RExC_npar (pRExC_state->npar)
-#define RExC_nestroot (pRExC_state->nestroot)
-#define RExC_extralen (pRExC_state->extralen)
-#define RExC_seen_zerolen (pRExC_state->seen_zerolen)
-#define RExC_seen_evals (pRExC_state->seen_evals)
-#define RExC_utf8 (pRExC_state->utf8)
-#define RExC_orig_utf8 (pRExC_state->orig_utf8)
-#define RExC_charnames (pRExC_state->charnames)
-#define RExC_open_parens (pRExC_state->open_parens)
-#define RExC_close_parens (pRExC_state->close_parens)
-#define RExC_opend (pRExC_state->opend)
-#define RExC_paren_names (pRExC_state->paren_names)
-#define RExC_recurse (pRExC_state->recurse)
-#define RExC_recurse_count (pRExC_state->recurse_count)
-
-
-#define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?')
-#define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \
- ((*s) == '{' && regcurly(s)))
-
-#ifdef SPSTART
-#undef SPSTART /* dratted cpp namespace... */
-#endif
-/*
- * Flags to be passed up and down.
- */
-#define WORST 0 /* Worst case. */
-#define HASWIDTH 0x01 /* Known to match non-null strings. */
-#define SIMPLE 0x02 /* Simple enough to be STAR/PLUS operand. */
-#define SPSTART 0x04 /* Starts with * or +. */
-#define TRYAGAIN 0x08 /* Weeded out a declaration. */
-#define POSTPONED 0x10 /* (?1),(?&name), (??{...}) or similar */
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-RExC_emit_start) : -1)
-
-/* whether trie related optimizations are enabled */
-#if PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION
-#define TRIE_STUDY_OPT
-#define FULL_TRIE_STUDY
-#define TRIE_STCLASS
-#endif
-
-
-
-#define PBYTE(u8str,paren) ((U8*)(u8str))[(paren) >> 3]
-#define PBITVAL(paren) (1 << ((paren) & 7))
-#define PAREN_TEST(u8str,paren) ( PBYTE(u8str,paren) & PBITVAL(paren))
-#define PAREN_SET(u8str,paren) PBYTE(u8str,paren) |= PBITVAL(paren)
-#define PAREN_UNSET(u8str,paren) PBYTE(u8str,paren) &= (~PBITVAL(paren))
-
-
-/* About scan_data_t.
-
- During optimisation we recurse through the regexp program performing
- various inplace (keyhole style) optimisations. In addition study_chunk
- and scan_commit populate this data structure with information about
- what strings MUST appear in the pattern. We look for the longest
- string that must appear for at a fixed location, and we look for the
- longest string that may appear at a floating location. So for instance
- in the pattern:
-
- /FOO[xX]A.*B[xX]BAR/
-
- Both 'FOO' and 'A' are fixed strings. Both 'B' and 'BAR' are floating
- strings (because they follow a .* construct). study_chunk will identify
- both FOO and BAR as being the longest fixed and floating strings respectively.
-
- The strings can be composites, for instance
-
- /(f)(o)(o)/
-
- will result in a composite fixed substring 'foo'.
-
- For each string some basic information is maintained:
-
- - offset or min_offset
- This is the position the string must appear at, or not before.
- It also implicitly (when combined with minlenp) tells us how many
- character must match before the string we are searching.
- Likewise when combined with minlenp and the length of the string
- tells us how many characters must appear after the string we have
- found.
-
- - max_offset
- Only used for floating strings. This is the rightmost point that
- the string can appear at. Ifset to I32 max it indicates that the
- string can occur infinitely far to the right.
-
- - minlenp
- A pointer to the minimum length of the pattern that the string
- was found inside. This is important as in the case of positive
- lookahead or positive lookbehind we can have multiple patterns
- involved. Consider
-
- /(?=FOO).*F/
-
- The minimum length of the pattern overall is 3, the minimum length
- of the lookahead part is 3, but the minimum length of the part that
- will actually match is 1. So 'FOO's minimum length is 3, but the
- minimum length for the F is 1. This is important as the minimum length
- is used to determine offsets in front of and behind the string being
- looked for. Since strings can be composites this is the length of the
- pattern at the time it was commited with a scan_commit. Note that
- the length is calculated by study_chunk, so that the minimum lengths
- are not known until the full pattern has been compiled, thus the
- pointer to the value.
-
- - lookbehind
-
- In the case of lookbehind the string being searched for can be
- offset past the start point of the final matching string.
- If this value was just blithely removed from the min_offset it would
- invalidate some of the calculations for how many chars must match
- before or after (as they are derived from min_offset and minlen and
- the length of the string being searched for).
- When the final pattern is compiled and the data is moved from the
- scan_data_t structure into the regexp structure the information
- about lookbehind is factored in, with the information that would
- have been lost precalculated in the end_shift field for the
- associated string.
-
- The fields pos_min and pos_delta are used to store the minimum offset
- and the delta to the maximum offset at the current point in the pattern.
-
-*/
-
-typedef struct scan_data_t {
- /*I32 len_min; unused */
- /*I32 len_delta; unused */
- I32 pos_min;
- I32 pos_delta;
- SV *last_found;
- I32 last_end; /* min value, <0 unless valid. */
- I32 last_start_min;
- I32 last_start_max;
- SV **longest; /* Either &l_fixed, or &l_float. */
- SV *longest_fixed; /* longest fixed string found in pattern */
- I32 offset_fixed; /* offset where it starts */
- I32 *minlen_fixed; /* pointer to the minlen relevent to the string */
- I32 lookbehind_fixed; /* is the position of the string modfied by LB */
- SV *longest_float; /* longest floating string found in pattern */
- I32 offset_float_min; /* earliest point in string it can appear */
- I32 offset_float_max; /* latest point in string it can appear */
- I32 *minlen_float; /* pointer to the minlen relevent to the string */
- I32 lookbehind_float; /* is the position of the string modified by LB */
- I32 flags;
- I32 whilem_c;
- I32 *last_closep;
- struct regnode_charclass_class *start_class;
-} scan_data_t;
-
-/*
- * Forward declarations for pregcomp()'s friends.
- */
-
-static const scan_data_t zero_scan_data =
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0};
-
-#define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL)
-#define SF_BEFORE_SEOL 0x0001
-#define SF_BEFORE_MEOL 0x0002
-#define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL)
-#define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL)
-
-#ifdef NO_UNARY_PLUS
-# define SF_FIX_SHIFT_EOL (0+2)
-# define SF_FL_SHIFT_EOL (0+4)
-#else
-# define SF_FIX_SHIFT_EOL (+2)
-# define SF_FL_SHIFT_EOL (+4)
-#endif
-
-#define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL)
-#define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL)
-
-#define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL)
-#define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */
-#define SF_IS_INF 0x0040
-#define SF_HAS_PAR 0x0080
-#define SF_IN_PAR 0x0100
-#define SF_HAS_EVAL 0x0200
-#define SCF_DO_SUBSTR 0x0400
-#define SCF_DO_STCLASS_AND 0x0800
-#define SCF_DO_STCLASS_OR 0x1000
-#define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR)
-#define SCF_WHILEM_VISITED_POS 0x2000
-
-#define SCF_TRIE_RESTUDY 0x4000 /* Do restudy? */
-#define SCF_SEEN_ACCEPT 0x8000
-
-#define UTF (RExC_utf8 != 0)
-#define LOC ((RExC_flags & RXf_PMf_LOCALE) != 0)
-#define FOLD ((RExC_flags & RXf_PMf_FOLD) != 0)
-
-#define OOB_UNICODE 12345678
-#define OOB_NAMEDCLASS -1
-
-#define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b)
-
-
-/* length of regex to show in messages that don't mark a position within */
-#define RegexLengthToShowInErrorMessages 127
-
-/*
- * If MARKER[12] are adjusted, be sure to adjust the constants at the top
- * of t/op/regmesg.t, the tests in t/op/re_tests, and those in
- * op/pragma/warn/regcomp.
- */
-#define MARKER1 "<-- HERE" /* marker as it appears in the description */
-#define MARKER2 " <-- HERE " /* marker as it appears within the regex */
-
-#define REPORT_LOCATION " in regex; marked by " MARKER1 " in m/%.*s" MARKER2 "%s/"
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given
- * arg. Show regex, up to a maximum length. If it's too long, chop and add
- * "...".
- */
-#define _FAIL(code) STMT_START { \
- const char *ellipses = ""; \
- IV len = RExC_end - RExC_precomp; \
- \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- if (len > RegexLengthToShowInErrorMessages) { \
- /* chop 10 shorter than the max, to ensure meaning of "..." */ \
- len = RegexLengthToShowInErrorMessages - 10; \
- ellipses = "..."; \
- } \
- code; \
-} STMT_END
-
-#define FAIL(msg) _FAIL( \
- Perl_croak(aTHX_ "%s in regex m/%.*s%s/", \
- msg, (int)len, RExC_precomp, ellipses))
-
-#define FAIL2(msg,arg) _FAIL( \
- Perl_croak(aTHX_ msg " in regex m/%.*s%s/", \
- arg, (int)len, RExC_precomp, ellipses))
-
-/*
- * Simple_vFAIL -- like FAIL, but marks the current location in the scan
- */
-#define Simple_vFAIL(m) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- Perl_croak(aTHX_ "%s" REPORT_LOCATION, \
- m, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL()
- */
-#define vFAIL(m) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL(m); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts two arguments.
- */
-#define Simple_vFAIL2(m,a1) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2().
- */
-#define vFAIL2(m,a1) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL2(m, a1); \
-} STMT_END
-
-
-/*
- * Like Simple_vFAIL(), but accepts three arguments.
- */
-#define Simple_vFAIL3(m, a1, a2) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3().
- */
-#define vFAIL3(m,a1,a2) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL3(m, a1, a2); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts four arguments.
- */
-#define Simple_vFAIL4(m, a1, a2, a3) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s" REPORT_LOCATION, \
- m, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARNdep(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_REGEXP), \
- "%s" REPORT_LOCATION, \
- m, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-
-#define vWARN2(loc, m, a1) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN3(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN4(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN5(loc, m, a1, a2, a3, a4) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, a4, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-
-/* Allow for side effects in s */
-#define REGC(c,s) STMT_START { \
- if (!SIZE_ONLY) *(s) = (c); else (void)(s); \
-} STMT_END
-
-/* Macros for recording node offsets. 20001227 mjd@plover.com
- * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in
- * element 2*n-1 of the array. Element #2n holds the byte length node #n.
- * Element 0 holds the number n.
- * Position is 1 indexed.
- */
-#ifndef RE_TRACK_PATTERN_OFFSETS
-#define Set_Node_Offset_To_R(node,byte)
-#define Set_Node_Offset(node,byte)
-#define Set_Cur_Node_Offset
-#define Set_Node_Length_To_R(node,len)
-#define Set_Node_Length(node,len)
-#define Set_Node_Cur_Length(node)
-#define Node_Offset(n)
-#define Node_Length(n)
-#define Set_Node_Offset_Length(node,offset,len)
-#define ProgLen(ri) ri->u.proglen
-#define SetProgLen(ri,x) ri->u.proglen = x
-#else
-#define ProgLen(ri) ri->u.offsets[0]
-#define SetProgLen(ri,x) ri->u.offsets[0] = x
-#define Set_Node_Offset_To_R(node,byte) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) offset of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(byte))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Offset macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)-1] = (byte); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Offset(node,byte) \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start)
-#define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse)
-
-#define Set_Node_Length_To_R(node,len) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) size of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(len))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Length macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)] = (len); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Length(node,len) \
- Set_Node_Length_To_R((node)-RExC_emit_start, len)
-#define Set_Cur_Node_Length(len) Set_Node_Length(RExC_emit, len)
-#define Set_Node_Cur_Length(node) \
- Set_Node_Length(node, RExC_parse - parse_start)
-
-/* Get offsets and lengths */
-#define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1])
-#define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)])
-
-#define Set_Node_Offset_Length(node,offset,len) STMT_START { \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (offset)); \
- Set_Node_Length_To_R((node)-RExC_emit_start, (len)); \
-} STMT_END
-#endif
-
-#if PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS
-#define EXPERIMENTAL_INPLACESCAN
-#endif /*RE_TRACK_PATTERN_OFFSETS*/
-
-#define DEBUG_STUDYDATA(str,data,depth) \
-DEBUG_OPTIMISE_MORE_r(if(data){ \
- PerlIO_printf(Perl_debug_log, \
- "%*s" str "Pos:%"IVdf"/%"IVdf \
- " Flags: 0x%"UVXf" Whilem_c: %"IVdf" Lcp: %"IVdf" %s", \
- (int)(depth)*2, "", \
- (IV)((data)->pos_min), \
- (IV)((data)->pos_delta), \
- (UV)((data)->flags), \
- (IV)((data)->whilem_c), \
- (IV)((data)->last_closep ? *((data)->last_closep) : -1), \
- is_inf ? "INF " : "" \
- ); \
- if ((data)->last_found) \
- PerlIO_printf(Perl_debug_log, \
- "Last:'%s' %"IVdf":%"IVdf"/%"IVdf" %sFixed:'%s' @ %"IVdf \
- " %sFloat: '%s' @ %"IVdf"/%"IVdf"", \
- SvPVX_const((data)->last_found), \
- (IV)((data)->last_end), \
- (IV)((data)->last_start_min), \
- (IV)((data)->last_start_max), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_fixed)) ? "*" : "", \
- SvPVX_const((data)->longest_fixed), \
- (IV)((data)->offset_fixed), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_float)) ? "*" : "", \
- SvPVX_const((data)->longest_float), \
- (IV)((data)->offset_float_min), \
- (IV)((data)->offset_float_max) \
- ); \
- PerlIO_printf(Perl_debug_log,"\n"); \
-});
-
-static void clear_re(pTHX_ void *r);
-
-/* Mark that we cannot extend a found fixed substring at this point.
- Update the longest found anchored substring and the longest found
- floating substrings if needed. */
-
-STATIC void
-S_scan_commit(pTHX_ const RExC_state_t *pRExC_state, scan_data_t *data, I32 *minlenp, int is_inf)
-{
- const STRLEN l = CHR_SVLEN(data->last_found);
- const STRLEN old_l = CHR_SVLEN(*data->longest);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_SCAN_COMMIT;
-
- if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) {
- SvSetMagicSV(*data->longest, data->last_found);
- if (*data->longest == data->longest_fixed) {
- data->offset_fixed = l ? data->last_start_min : data->pos_min;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL);
- else
- data->flags &= ~SF_FIX_BEFORE_EOL;
- data->minlen_fixed=minlenp;
- data->lookbehind_fixed=0;
- }
- else { /* *data->longest == data->longest_float */
- data->offset_float_min = l ? data->last_start_min : data->pos_min;
- data->offset_float_max = (l
- ? data->last_start_max
- : data->pos_min + data->pos_delta);
- if (is_inf || (U32)data->offset_float_max > (U32)I32_MAX)
- data->offset_float_max = I32_MAX;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL);
- else
- data->flags &= ~SF_FL_BEFORE_EOL;
- data->minlen_float=minlenp;
- data->lookbehind_float=0;
- }
- }
- SvCUR_set(data->last_found, 0);
- {
- SV * const sv = data->last_found;
- if (SvUTF8(sv) && SvMAGICAL(sv)) {
- MAGIC * const mg = mg_find(sv, PERL_MAGIC_utf8);
- if (mg)
- mg->mg_len = 0;
- }
- }
- data->last_end = -1;
- data->flags &= ~SF_BEFORE_EOL;
- DEBUG_STUDYDATA("commit: ",data,0);
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_anything(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_ANYTHING;
-
- ANYOF_CLASS_ZERO(cl);
- ANYOF_BITMAP_SETALL(cl);
- cl->flags = ANYOF_EOS|ANYOF_UNICODE_ALL;
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* Can match anything (initialization) */
-STATIC int
-S_cl_is_anything(const struct regnode_charclass_class *cl)
-{
- int value;
-
- PERL_ARGS_ASSERT_CL_IS_ANYTHING;
-
- for (value = 0; value <= ANYOF_MAX; value += 2)
- if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1))
- return 1;
- if (!(cl->flags & ANYOF_UNICODE_ALL))
- return 0;
- if (!ANYOF_BITMAP_TESTALLSET((const void*)cl))
- return 0;
- return 1;
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_init(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
-}
-
-STATIC void
-S_cl_init_zero(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT_ZERO;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* 'And' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_and(struct regnode_charclass_class *cl,
- const struct regnode_charclass_class *and_with)
-{
- PERL_ARGS_ASSERT_CL_AND;
-
- assert(and_with->type == ANYOF);
- if (!(and_with->flags & ANYOF_CLASS)
- && !(cl->flags & ANYOF_CLASS)
- && (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(and_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD)) {
- int i;
-
- if (and_with->flags & ANYOF_INVERT)
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= ~and_with->bitmap[i];
- else
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= and_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise, leave it along for a moment. */
- if (!(and_with->flags & ANYOF_EOS))
- cl->flags &= ~ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE_ALL && and_with->flags & ANYOF_UNICODE &&
- !(and_with->flags & ANYOF_INVERT)) {
- cl->flags &= ~ANYOF_UNICODE_ALL;
- cl->flags |= ANYOF_UNICODE;
- ARG_SET(cl, ARG(and_with));
- }
- if (!(and_with->flags & ANYOF_UNICODE_ALL) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE_ALL;
- if (!(and_with->flags & (ANYOF_UNICODE|ANYOF_UNICODE_ALL)) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE;
-}
-
-/* 'OR' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_or(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl, const struct regnode_charclass_class *or_with)
-{
- PERL_ARGS_ASSERT_CL_OR;
-
- if (or_with->flags & ANYOF_INVERT) {
- /* We do not use
- * (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2))
- * <= (B1 | !B2) | (CL1 | !CL2)
- * which is wasteful if CL2 is small, but we ignore CL2:
- * (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1
- * XXXX Can we handle case-fold? Unclear:
- * (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) =
- * (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i'))
- */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(or_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD) ) {
- int i;
-
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= ~or_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise */
- else {
- cl_anything(pRExC_state, cl);
- }
- } else {
- /* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && (!(or_with->flags & ANYOF_FOLD)
- || (cl->flags & ANYOF_FOLD)) ) {
- int i;
-
- /* OR char bitmap and class bitmap separately */
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= or_with->bitmap[i];
- if (or_with->flags & ANYOF_CLASS) {
- for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++)
- cl->classflags[i] |= or_with->classflags[i];
- cl->flags |= ANYOF_CLASS;
- }
- }
- else { /* XXXX: logic is complicated, leave it along for a moment. */
- cl_anything(pRExC_state, cl);
- }
- }
- if (or_with->flags & ANYOF_EOS)
- cl->flags |= ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE && or_with->flags & ANYOF_UNICODE &&
- ARG(cl) != ARG(or_with)) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
- if (or_with->flags & ANYOF_UNICODE_ALL) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
-}
-
-#define TRIE_LIST_ITEM(state,idx) (trie->states[state].trans.list)[ idx ]
-#define TRIE_LIST_CUR(state) ( TRIE_LIST_ITEM( state, 0 ).forid )
-#define TRIE_LIST_LEN(state) ( TRIE_LIST_ITEM( state, 0 ).newstate )
-#define TRIE_LIST_USED(idx) ( trie->states[state].trans.list ? (TRIE_LIST_CUR( idx ) - 1) : 0 )
-
-
-#ifdef DEBUGGING
-/*
- dump_trie(trie,widecharmap,revcharmap)
- dump_trie_interim_list(trie,widecharmap,revcharmap,next_alloc)
- dump_trie_interim_table(trie,widecharmap,revcharmap,next_alloc)
-
- These routines dump out a trie in a somewhat readable format.
- The _interim_ variants are used for debugging the interim
- tables that are used to generate the final compressed
- representation which is what dump_trie expects.
-
- Part of the reason for their existance is to provide a form
- of documentation as to how the different representations function.
-
-*/
-
-/*
- Dumps the final compressed table form of the trie to Perl_debug_log.
- Used for debugging make_trie().
-*/
-
-STATIC void
-S_dump_trie(pTHX_ const struct _reg_trie_data *trie, HV *widecharmap,
- AV *revcharmap, U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE;
-
- PerlIO_printf( Perl_debug_log, "%*sChar : %-6s%-6s%-4s ",
- (int)depth * 2 + 2,"",
- "Match","Base","Ofs" );
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ ) {
- SV ** const tmp = av_fetch( revcharmap, state, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
- PerlIO_printf( Perl_debug_log, "\n%*sState|-----------------------",
- (int)depth * 2 + 2,"");
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ )
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth, "--------");
- PerlIO_printf( Perl_debug_log, "\n");
-
- for( state = 1 ; state < trie->statecount ; state++ ) {
- const U32 base = trie->states[ state ].trans.base;
-
- PerlIO_printf( Perl_debug_log, "%*s#%4"UVXf"|", (int)depth * 2 + 2,"", (UV)state);
-
- if ( trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " W%4X", trie->states[ state ].wordnum );
- } else {
- PerlIO_printf( Perl_debug_log, "%6s", "" );
- }
-
- PerlIO_printf( Perl_debug_log, " @%4"UVXf" ", (UV)base );
-
- if ( base ) {
- U32 ofs = 0;
-
- while( ( base + ofs < trie->uniquecharcount ) ||
- ( base + ofs - trie->uniquecharcount < trie->lasttrans
- && trie->trans[ base + ofs - trie->uniquecharcount ].check != state))
- ofs++;
-
- PerlIO_printf( Perl_debug_log, "+%2"UVXf"[ ", (UV)ofs);
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- PerlIO_printf( Perl_debug_log, "%*"UVXf,
- colwidth,
- (UV)trie->trans[ base + ofs - trie->uniquecharcount ].next );
- } else {
- PerlIO_printf( Perl_debug_log, "%*s",colwidth," ." );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "]");
-
- }
- PerlIO_printf( Perl_debug_log, "\n" );
- }
-}
-/*
- Dumps a fully constructed but uncompressed trie in list form.
- List tries normally only are used for construction when the number of
- possible chars (trie->uniquecharcount) is very high.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_list(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_LIST;
-
- /* print out the table precompression. */
- PerlIO_printf( Perl_debug_log, "%*sState :Word | Transition Data\n%*s%s",
- (int)depth * 2 + 2,"", (int)depth * 2 + 2,"",
- "------:-----+-----------------\n" );
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U16 charid;
-
- PerlIO_printf( Perl_debug_log, "%*s %4"UVXf" :",
- (int)depth * 2 + 2,"", (UV)state );
- if ( ! trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, "%5s| ","");
- } else {
- PerlIO_printf( Perl_debug_log, "W%4x| ",
- trie->states[ state ].wordnum
- );
- }
- for( charid = 1 ; charid <= TRIE_LIST_USED( state ) ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, TRIE_LIST_ITEM(state,charid).forid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s:%3X=%4"UVXf" | ",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- ) ,
- TRIE_LIST_ITEM(state,charid).forid,
- (UV)TRIE_LIST_ITEM(state,charid).newstate
- );
- if (!(charid % 10))
- PerlIO_printf(Perl_debug_log, "\n%*s| ",
- (int)((depth * 2) + 14), "");
- }
- }
- PerlIO_printf( Perl_debug_log, "\n");
- }
-}
-
-/*
- Dumps a fully constructed but uncompressed trie in table form.
- This is the normal DFA style state transition table, with a few
- twists to facilitate compression later.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_table(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- U16 charid;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_TABLE;
-
- /*
- print out the table precompression so that we can do a visual check
- that they are identical.
- */
-
- PerlIO_printf( Perl_debug_log, "%*sChar : ",(int)depth * 2 + 2,"" );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, charid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "\n%*sState+-",(int)depth * 2 + 2,"" );
-
- for( charid=0 ; charid < trie->uniquecharcount ; charid++ ) {
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth,"--------");
- }
-
- PerlIO_printf( Perl_debug_log, "\n" );
-
- for( state=1 ; state < next_alloc ; state += trie->uniquecharcount ) {
-
- PerlIO_printf( Perl_debug_log, "%*s%4"UVXf" : ",
- (int)depth * 2 + 2,"",
- (UV)TRIE_NODENUM( state ) );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- UV v=(UV)SAFE_TRIE_NODENUM( trie->trans[ state + charid ].next );
- if (v)
- PerlIO_printf( Perl_debug_log, "%*"UVXf, colwidth, v );
- else
- PerlIO_printf( Perl_debug_log, "%*s", colwidth, "." );
- }
- if ( ! trie->states[ TRIE_NODENUM( state ) ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf")\n", (UV)trie->trans[ state ].check );
- } else {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf") W%4X\n", (UV)trie->trans[ state ].check,
- trie->states[ TRIE_NODENUM( state ) ].wordnum );
- }
- }
-}
-
-#endif
-
-/* make_trie(startbranch,first,last,tail,word_count,flags,depth)
- startbranch: the first branch in the whole branch sequence
- first : start branch of sequence of branch-exact nodes.
- May be the same as startbranch
- last : Thing following the last branch.
- May be the same as tail.
- tail : item following the branch sequence
- count : words in the sequence
- flags : currently the OP() type we will be building one of /EXACT(|F|Fl)/
- depth : indent depth
-
-Inplace optimizes a sequence of 2 or more Branch-Exact nodes into a TRIE node.
-
-A trie is an N'ary tree where the branches are determined by digital
-decomposition of the key. IE, at the root node you look up the 1st character and
-follow that branch repeat until you find the end of the branches. Nodes can be
-marked as "accepting" meaning they represent a complete word. Eg:
-
- /he|she|his|hers/
-
-would convert into the following structure. Numbers represent states, letters
-following numbers represent valid transitions on the letter from that state, if
-the number is in square brackets it represents an accepting state, otherwise it
-will be in parenthesis.
-
- +-h->+-e->[3]-+-r->(8)-+-s->[9]
- | |
- | (2)
- | |
- (1) +-i->(6)-+-s->[7]
- |
- +-s->(3)-+-h->(4)-+-e->[5]
-
- Accept Word Mapping: 3=>1 (he),5=>2 (she), 7=>3 (his), 9=>4 (hers)
-
-This shows that when matching against the string 'hers' we will begin at state 1
-read 'h' and move to state 2, read 'e' and move to state 3 which is accepting,
-then read 'r' and go to state 8 followed by 's' which takes us to state 9 which
-is also accepting. Thus we know that we can match both 'he' and 'hers' with a
-single traverse. We store a mapping from accepting to state to which word was
-matched, and then when we have multiple possibilities we try to complete the
-rest of the regex in the order in which they occured in the alternation.
-
-The only prior NFA like behaviour that would be changed by the TRIE support is
-the silent ignoring of duplicate alternations which are of the form:
-
- / (DUPE|DUPE) X? (?{ ... }) Y /x
-
-Thus EVAL blocks follwing a trie may be called a different number of times with
-and without the optimisation. With the optimisations dupes will be silently
-ignored. This inconsistant behaviour of EVAL type nodes is well established as
-the following demonstrates:
-
- 'words'=~/(word|word|word)(?{ print $1 })[xyz]/
-
-which prints out 'word' three times, but
-
- 'words'=~/(word|word|word)(?{ print $1 })S/
-
-which doesnt print it out at all. This is due to other optimisations kicking in.
-
-Example of what happens on a structural level:
-
-The regexp /(ac|ad|ab)+/ will produce the folowing debug output:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: BRANCH(8)
- 6: EXACT <ac>(16)
- 8: BRANCH(11)
- 9: EXACT <ad>(16)
- 11: BRANCH(14)
- 12: EXACT <ab>(16)
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-This would be optimizable with startbranch=5, first=5, last=16, tail=16
-and should turn into:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: TRIE(16)
- [Words:3 Chars Stored:6 Unique Chars:4 States:5 NCP:1]
- <ac>
- <ad>
- <ab>
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-Cases where tail != last would be like /(?foo|bar)baz/:
-
- 1: BRANCH(4)
- 2: EXACT <foo>(8)
- 4: BRANCH(7)
- 5: EXACT <bar>(8)
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
-which would be optimizable with startbranch=1, first=1, last=7, tail=8
-and would end up looking like:
-
- 1: TRIE(8)
- [Words:2 Chars Stored:6 Unique Chars:5 States:7 NCP:1]
- <foo>
- <bar>
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
- d = uvuni_to_utf8_flags(d, uv, 0);
-
-is the recommended Unicode-aware way of saying
-
- *(d++) = uv;
-*/
-
-#define TRIE_STORE_REVCHAR \
- STMT_START { \
- if (UTF) { \
- SV *zlopp = newSV(2); \
- unsigned char *flrbbbbb = (unsigned char *) SvPVX(zlopp); \
- unsigned const char *const kapow = uvuni_to_utf8(flrbbbbb, uvc & 0xFF); \
- SvCUR_set(zlopp, kapow - flrbbbbb); \
- SvPOK_on(zlopp); \
- SvUTF8_on(zlopp); \
- av_push(revcharmap, zlopp); \
- } else { \
- char ooooff = (char)uvc; \
- av_push(revcharmap, newSVpvn(&ooooff, 1)); \
- } \
- } STMT_END
-
-#define TRIE_READ_CHAR STMT_START { \
- wordlen++; \
- if ( UTF ) { \
- if ( folder ) { \
- if ( foldlen > 0 ) { \
- uvc = utf8n_to_uvuni( scan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- scan += len; \
- len = 0; \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- scan = foldbuf + UNISKIP( uvc ); \
- } \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- } \
- } else { \
- uvc = (U32)*uc; \
- len = 1; \
- } \
-} STMT_END
-
-
-
-#define TRIE_LIST_PUSH(state,fid,ns) STMT_START { \
- if ( TRIE_LIST_CUR( state ) >=TRIE_LIST_LEN( state ) ) { \
- U32 ging = TRIE_LIST_LEN( state ) *= 2; \
- Renew( trie->states[ state ].trans.list, ging, reg_trie_trans_le ); \
- } \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).forid = fid; \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).newstate = ns; \
- TRIE_LIST_CUR( state )++; \
-} STMT_END
-
-#define TRIE_LIST_NEW(state) STMT_START { \
- Newxz( trie->states[ state ].trans.list, \
- 4, reg_trie_trans_le ); \
- TRIE_LIST_CUR( state ) = 1; \
- TRIE_LIST_LEN( state ) = 4; \
-} STMT_END
-
-#define TRIE_HANDLE_WORD(state) STMT_START { \
- U16 dupe= trie->states[ state ].wordnum; \
- regnode * const noper_next = regnext( noper ); \
- \
- if (trie->wordlen) \
- trie->wordlen[ curword ] = wordlen; \
- DEBUG_r({ \
- /* store the word for dumping */ \
- SV* tmp; \
- if (OP(noper) != NOTHING) \
- tmp = newSVpvn_utf8(STRING(noper), STR_LEN(noper), UTF); \
- else \
- tmp = newSVpvn_utf8( "", 0, UTF ); \
- av_push( trie_words, tmp ); \
- }); \
- \
- curword++; \
- \
- if ( noper_next < tail ) { \
- if (!trie->jump) \
- trie->jump = (U16 *) PerlMemShared_calloc( word_count + 1, sizeof(U16) ); \
- trie->jump[curword] = (U16)(noper_next - convert); \
- if (!jumper) \
- jumper = noper_next; \
- if (!nextbranch) \
- nextbranch= regnext(cur); \
- } \
- \
- if ( dupe ) { \
- /* So it's a dupe. This means we need to maintain a */\
- /* linked-list from the first to the next. */\
- /* we only allocate the nextword buffer when there */\
- /* a dupe, so first time we have to do the allocation */\
- if (!trie->nextword) \
- trie->nextword = (U16 *) \
- PerlMemShared_calloc( word_count + 1, sizeof(U16)); \
- while ( trie->nextword[dupe] ) \
- dupe= trie->nextword[dupe]; \
- trie->nextword[dupe]= curword; \
- } else { \
- /* we haven't inserted this word yet. */ \
- trie->states[ state ].wordnum = curword; \
- } \
-} STMT_END
-
-
-#define TRIE_TRANS_STATE(state,base,ucharcount,charid,special) \
- ( ( base + charid >= ucharcount \
- && base + charid < ubound \
- && state == trie->trans[ base - ucharcount + charid ].check \
- && trie->trans[ base - ucharcount + charid ].next ) \
- ? trie->trans[ base - ucharcount + charid ].next \
- : ( state==1 ? special : 0 ) \
- )
-
-#define MADE_TRIE 1
-#define MADE_JUMP_TRIE 2
-#define MADE_EXACT_TRIE 4
-
-STATIC I32
-S_make_trie(pTHX_ RExC_state_t *pRExC_state, regnode *startbranch, regnode *first, regnode *last, regnode *tail, U32 word_count, U32 flags, U32 depth)
-{
- dVAR;
- /* first pass, loop through and scan words */
- reg_trie_data *trie;
- HV *widecharmap = NULL;
- AV *revcharmap = newAV();
- regnode *cur;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- STRLEN len = 0;
- UV uvc = 0;
- U16 curword = 0;
- U32 next_alloc = 0;
- regnode *jumper = NULL;
- regnode *nextbranch = NULL;
- regnode *convert = NULL;
- /* we just use folder as a flag in utf8 */
- const U8 * const folder = ( flags == EXACTF
- ? PL_fold
- : ( flags == EXACTFL
- ? PL_fold_locale
- : NULL
- )
- );
-
-#ifdef DEBUGGING
- const U32 data_slot = add_data( pRExC_state, 4, "tuuu" );
- AV *trie_words = NULL;
- /* along with revcharmap, this only used during construction but both are
- * useful during debugging so we store them in the struct when debugging.
- */
-#else
- const U32 data_slot = add_data( pRExC_state, 2, "tu" );
- STRLEN trie_charcount=0;
-#endif
- SV *re_trie_maxbuff;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- trie = (reg_trie_data *) PerlMemShared_calloc( 1, sizeof(reg_trie_data) );
- trie->refcount = 1;
- trie->startstate = 1;
- trie->wordcount = word_count;
- RExC_rxi->data->data[ data_slot ] = (void*)trie;
- trie->charmap = (U16 *) PerlMemShared_calloc( 256, sizeof(U16) );
- if (!(UTF && folder))
- trie->bitmap = (char *) PerlMemShared_calloc( ANYOF_BITMAP_SIZE, 1 );
- DEBUG_r({
- trie_words = newAV();
- });
-
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff)) {
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- DEBUG_OPTIMISE_r({
- PerlIO_printf( Perl_debug_log,
- "%*smake_trie start==%d, first==%d, last==%d, tail==%d depth=%d\n",
- (int)depth * 2 + 2, "",
- REG_NODE_NUM(startbranch),REG_NODE_NUM(first),
- REG_NODE_NUM(last), REG_NODE_NUM(tail),
- (int)depth);
- });
-
- /* Find the node we are going to overwrite */
- if ( first == startbranch && OP( last ) != BRANCH ) {
- /* whole branch chain */
- convert = first;
- } else {
- /* branch sub-chain */
- convert = NEXTOPER( first );
- }
-
- /* -- First loop and Setup --
-
- We first traverse the branches and scan each word to determine if it
- contains widechars, and how many unique chars there are, this is
- important as we have to build a table with at least as many columns as we
- have unique chars.
-
- We use an array of integers to represent the character codes 0..255
- (trie->charmap) and we use a an HV* to store Unicode characters. We use the
- native representation of the character value as the key and IV's for the
- coded index.
-
- *TODO* If we keep track of how many times each character is used we can
- remap the columns so that the table compression later on is more
- efficient in terms of memory by ensuring most common value is in the
- middle and the least common are on the outside. IMO this would be better
- than a most to least common mapping as theres a decent chance the most
- common letter will share a node with the least common, meaning the node
- will not be compressable. With a middle is most common approach the worst
- case is when we have the least common nodes twice.
-
- */
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- STRLEN foldlen = 0;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- const U8 *scan = (U8*)NULL;
- U32 wordlen = 0; /* required init */
- STRLEN chars = 0;
- bool set_bit = trie->bitmap ? 1 : 0; /*store the first char in the bitmap?*/
-
- if (OP(noper) == NOTHING) {
- trie->minlen= 0;
- continue;
- }
- if ( set_bit ) /* bitmap only alloced when !(UTF&&Folding) */
- TRIE_BITMAP_SET(trie,*uc); /* store the raw first byte
- regardless of encoding */
-
- for ( ; uc < e ; uc += len ) {
- TRIE_CHARCOUNT(trie)++;
- TRIE_READ_CHAR;
- chars++;
- if ( uvc < 256 ) {
- if ( !trie->charmap[ uvc ] ) {
- trie->charmap[ uvc ]=( ++trie->uniquecharcount );
- if ( folder )
- trie->charmap[ folder[ uvc ] ] = trie->charmap[ uvc ];
- TRIE_STORE_REVCHAR;
- }
- if ( set_bit ) {
- /* store the codepoint in the bitmap, and if its ascii
- also store its folded equivelent. */
- TRIE_BITMAP_SET(trie,uvc);
-
- /* store the folded codepoint */
- if ( folder ) TRIE_BITMAP_SET(trie,folder[ uvc ]);
-
- if ( !UTF ) {
- /* store first byte of utf8 representation of
- codepoints in the 127 < uvc < 256 range */
- if (127 < uvc && uvc < 192) {
- TRIE_BITMAP_SET(trie,194);
- } else if (191 < uvc ) {
- TRIE_BITMAP_SET(trie,195);
- /* && uvc < 256 -- we know uvc is < 256 already */
- }
- }
- set_bit = 0; /* We've done our bit :-) */
- }
- } else {
- SV** svpp;
- if ( !widecharmap )
- widecharmap = newHV();
-
- svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 1 );
-
- if ( !svpp )
- Perl_croak( aTHX_ "error creating/fetching widecharmap entry for 0x%"UVXf, uvc );
-
- if ( !SvTRUE( *svpp ) ) {
- sv_setiv( *svpp, ++trie->uniquecharcount );
- TRIE_STORE_REVCHAR;
- }
- }
- }
- if( cur == first ) {
- trie->minlen=chars;
- trie->maxlen=chars;
- } else if (chars < trie->minlen) {
- trie->minlen=chars;
- } else if (chars > trie->maxlen) {
- trie->maxlen=chars;
- }
-
- } /* end first pass */
- DEBUG_TRIE_COMPILE_r(
- PerlIO_printf( Perl_debug_log, "%*sTRIE(%s): W:%d C:%d Uq:%d Min:%d Max:%d\n",
- (int)depth * 2 + 2,"",
- ( widecharmap ? "UTF8" : "NATIVE" ), (int)word_count,
- (int)TRIE_CHARCOUNT(trie), trie->uniquecharcount,
- (int)trie->minlen, (int)trie->maxlen )
- );
- trie->wordlen = (U32 *) PerlMemShared_calloc( word_count, sizeof(U32) );
-
- /*
- We now know what we are dealing with in terms of unique chars and
- string sizes so we can calculate how much memory a naive
- representation using a flat table will take. If it's over a reasonable
- limit (as specified by ${^RE_TRIE_MAXBUF}) we use a more memory
- conservative but potentially much slower representation using an array
- of lists.
-
- At the end we convert both representations into the same compressed
- form that will be used in regexec.c for matching with. The latter
- is a form that cannot be used to construct with but has memory
- properties similar to the list form and access properties similar
- to the table form making it both suitable for fast searches and
- small enough that its feasable to store for the duration of a program.
-
- See the comment in the code where the compressed table is produced
- inplace from the flat tabe representation for an explanation of how
- the compression works.
-
- */
-
-
- if ( (IV)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1) > SvIV(re_trie_maxbuff) ) {
- /*
- Second Pass -- Array Of Lists Representation
-
- Each state will be represented by a list of charid:state records
- (reg_trie_trans_le) the first such element holds the CUR and LEN
- points of the allocated array. (See defines above).
-
- We build the initial structure using the lists, and then convert
- it into the compressed table form which allows faster lookups
- (but cant be modified once converted).
- */
-
- STRLEN transcount = 1;
-
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using list compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- TRIE_LIST_NEW(1);
- next_alloc = 2;
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- U32 state = 1; /* required init */
- U16 charid = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if (OP(noper) != NOTHING) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV** const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- if ( !svpp ) {
- charid = 0;
- } else {
- charid=(U16)SvIV( *svpp );
- }
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- if ( charid ) {
-
- U16 check;
- U32 newstate = 0;
-
- charid--;
- if ( !trie->states[ state ].trans.list ) {
- TRIE_LIST_NEW( state );
- }
- for ( check = 1; check <= TRIE_LIST_USED( state ); check++ ) {
- if ( TRIE_LIST_ITEM( state, check ).forid == charid ) {
- newstate = TRIE_LIST_ITEM( state, check ).newstate;
- break;
- }
- }
- if ( ! newstate ) {
- newstate = next_alloc++;
- TRIE_LIST_PUSH( state, charid, newstate );
- transcount++;
- }
- state = newstate;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- }
- }
- TRIE_HANDLE_WORD(state);
-
- } /* end second pass */
-
- /* next alloc is the NEXT state to be allocated */
- trie->statecount = next_alloc;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states,
- next_alloc
- * sizeof(reg_trie_state) );
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_list(trie, widecharmap,
- revcharmap, next_alloc,
- depth+1)
- );
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( transcount, sizeof(reg_trie_trans) );
- {
- U32 state;
- U32 tp = 0;
- U32 zp = 0;
-
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U32 base=0;
-
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, "tp: %d zp: %d ",tp,zp)
- );
- */
-
- if (trie->states[state].trans.list) {
- U16 minid=TRIE_LIST_ITEM( state, 1).forid;
- U16 maxid=minid;
- U16 idx;
-
- for( idx = 2 ; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U16 forid = TRIE_LIST_ITEM( state, idx).forid;
- if ( forid < minid ) {
- minid=forid;
- } else if ( forid > maxid ) {
- maxid=forid;
- }
- }
- if ( transcount < tp + maxid - minid + 1) {
- transcount *= 2;
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans,
- transcount
- * sizeof(reg_trie_trans) );
- Zero( trie->trans + (transcount / 2), transcount / 2 , reg_trie_trans );
- }
- base = trie->uniquecharcount + tp - minid;
- if ( maxid == minid ) {
- U32 set = 0;
- for ( ; zp < tp ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- base = trie->uniquecharcount + zp - minid;
- trie->trans[ zp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ zp ].check = state;
- set = 1;
- break;
- }
- }
- if ( !set ) {
- trie->trans[ tp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ tp ].check = state;
- tp++;
- zp = tp;
- }
- } else {
- for ( idx=1; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U32 tid = base - trie->uniquecharcount + TRIE_LIST_ITEM( state, idx ).forid;
- trie->trans[ tid ].next = TRIE_LIST_ITEM( state, idx ).newstate;
- trie->trans[ tid ].check = state;
- }
- tp += ( maxid - minid + 1 );
- }
- Safefree(trie->states[ state ].trans.list);
- }
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, " base: %d\n",base);
- );
- */
- trie->states[ state ].trans.base=base;
- }
- trie->lasttrans = tp + 1;
- }
- } else {
- /*
- Second Pass -- Flat Table Representation.
-
- we dont use the 0 slot of either trans[] or states[] so we add 1 to each.
- We know that we will need Charcount+1 trans at most to store the data
- (one row per char at worst case) So we preallocate both structures
- assuming worst case.
-
- We then construct the trie using only the .next slots of the entry
- structs.
-
- We use the .check field of the first entry of the node temporarily to
- make compression both faster and easier by keeping track of how many non
- zero fields are in the node.
-
- Since trans are numbered from 1 any 0 pointer in the table is a FAIL
- transition.
-
- There are two terms at use here: state as a TRIE_NODEIDX() which is a
- number representing the first entry of the node, and state as a
- TRIE_NODENUM() which is the trans number. state 1 is TRIE_NODEIDX(1) and
- TRIE_NODENUM(1), state 2 is TRIE_NODEIDX(2) and TRIE_NODENUM(3) if there
- are 2 entrys per node. eg:
-
- A B A B
- 1. 2 4 1. 3 7
- 2. 0 3 3. 0 5
- 3. 0 0 5. 0 0
- 4. 0 0 7. 0 0
-
- The table is internally in the right hand, idx form. However as we also
- have to deal with the states array which is indexed by nodenum we have to
- use TRIE_NODENUM() to convert.
-
- */
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using table compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( ( TRIE_CHARCOUNT(trie) + 1 )
- * trie->uniquecharcount + 1,
- sizeof(reg_trie_trans) );
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- next_alloc = trie->uniquecharcount + 1;
-
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
-
- U32 state = 1; /* required init */
-
- U16 charid = 0; /* sanity init */
- U32 accept_state = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
-
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if ( OP(noper) != NOTHING ) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV* const * const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- charid = svpp ? (U16)SvIV(*svpp) : 0;
- }
- if ( charid ) {
- charid--;
- if ( !trie->trans[ state + charid ].next ) {
- trie->trans[ state + charid ].next = next_alloc;
- trie->trans[ state ].check++;
- next_alloc += trie->uniquecharcount;
- }
- state = trie->trans[ state + charid ].next;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- }
- }
- accept_state = TRIE_NODENUM( state );
- TRIE_HANDLE_WORD(accept_state);
-
- } /* end second pass */
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_table(trie, widecharmap,
- revcharmap,
- next_alloc, depth+1));
-
- {
- /*
- * Inplace compress the table.*
-
- For sparse data sets the table constructed by the trie algorithm will
- be mostly 0/FAIL transitions or to put it another way mostly empty.
- (Note that leaf nodes will not contain any transitions.)
-
- This algorithm compresses the tables by eliminating most such
- transitions, at the cost of a modest bit of extra work during lookup:
-
- - Each states[] entry contains a .base field which indicates the
- index in the state[] array wheres its transition data is stored.
-
- - If .base is 0 there are no valid transitions from that node.
-
- - If .base is nonzero then charid is added to it to find an entry in
- the trans array.
-
- -If trans[states[state].base+charid].check!=state then the
- transition is taken to be a 0/Fail transition. Thus if there are fail
- transitions at the front of the node then the .base offset will point
- somewhere inside the previous nodes data (or maybe even into a node
- even earlier), but the .check field determines if the transition is
- valid.
-
- XXX - wrong maybe?
- The following process inplace converts the table to the compressed
- table: We first do not compress the root node 1,and mark its all its
- .check pointers as 1 and set its .base pointer as 1 as well. This
- allows to do a DFA construction from the compressed table later, and
- ensures that any .base pointers we calculate later are greater than
- 0.
-
- - We set 'pos' to indicate the first entry of the second node.
-
- - We then iterate over the columns of the node, finding the first and
- last used entry at l and m. We then copy l..m into pos..(pos+m-l),
- and set the .check pointers accordingly, and advance pos
- appropriately and repreat for the next node. Note that when we copy
- the next pointers we have to convert them from the original
- NODEIDX form to NODENUM form as the former is not valid post
- compression.
-
- - If a node has no transitions used we mark its base as 0 and do not
- advance the pos pointer.
-
- - If a node only has one transition we use a second pointer into the
- structure to fill in allocated fail transitions from other states.
- This pointer is independent of the main pointer and scans forward
- looking for null transitions that are allocated to a state. When it
- finds one it writes the single transition into the "hole". If the
- pointer doesnt find one the single transition is appended as normal.
-
- - Once compressed we can Renew/realloc the structures to release the
- excess space.
-
- See "Table-Compression Methods" in sec 3.9 of the Red Dragon,
- specifically Fig 3.47 and the associated pseudocode.
-
- demq
- */
- const U32 laststate = TRIE_NODENUM( next_alloc );
- U32 state, charid;
- U32 pos = 0, zp=0;
- trie->statecount = laststate;
-
- for ( state = 1 ; state < laststate ; state++ ) {
- U8 flag = 0;
- const U32 stateidx = TRIE_NODEIDX( state );
- const U32 o_used = trie->trans[ stateidx ].check;
- U32 used = trie->trans[ stateidx ].check;
- trie->trans[ stateidx ].check = 0;
-
- for ( charid = 0 ; used && charid < trie->uniquecharcount ; charid++ ) {
- if ( flag || trie->trans[ stateidx + charid ].next ) {
- if ( trie->trans[ stateidx + charid ].next ) {
- if (o_used == 1) {
- for ( ; zp < pos ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- break;
- }
- }
- trie->states[ state ].trans.base = zp + trie->uniquecharcount - charid ;
- trie->trans[ zp ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ zp ].check = state;
- if ( ++zp > pos ) pos = zp;
- break;
- }
- used--;
- }
- if ( !flag ) {
- flag = 1;
- trie->states[ state ].trans.base = pos + trie->uniquecharcount - charid ;
- }
- trie->trans[ pos ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ pos ].check = state;
- pos++;
- }
- }
- }
- trie->lasttrans = pos + 1;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states, laststate
- * sizeof(reg_trie_state) );
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log,
- "%*sAlloc: %d Orig: %"IVdf" elements, Final:%"IVdf". Savings of %%%5.2f\n",
- (int)depth * 2 + 2,"",
- (int)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1 ),
- (IV)next_alloc,
- (IV)pos,
- ( ( next_alloc - pos ) * 100 ) / (double)next_alloc );
- );
-
- } /* end table compress */
- }
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf(Perl_debug_log, "%*sStatecount:%"UVxf" Lasttrans:%"UVxf"\n",
- (int)depth * 2 + 2, "",
- (UV)trie->statecount,
- (UV)trie->lasttrans)
- );
- /* resize the trans array to remove unused space */
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans, trie->lasttrans
- * sizeof(reg_trie_trans) );
-
- /* and now dump out the compressed format */
- DEBUG_TRIE_COMPILE_r(dump_trie(trie, widecharmap, revcharmap, depth+1));
-
- { /* Modify the program and insert the new TRIE node*/
- U8 nodetype =(U8)(flags & 0xFF);
- char *str=NULL;
-
-#ifdef DEBUGGING
- regnode *optimize = NULL;
-#ifdef RE_TRACK_PATTERN_OFFSETS
-
- U32 mjd_offset = 0;
- U32 mjd_nodelen = 0;
-#endif /* RE_TRACK_PATTERN_OFFSETS */
-#endif /* DEBUGGING */
- /*
- This means we convert either the first branch or the first Exact,
- depending on whether the thing following (in 'last') is a branch
- or not and whther first is the startbranch (ie is it a sub part of
- the alternation or is it the whole thing.)
- Assuming its a sub part we conver the EXACT otherwise we convert
- the whole branch sequence, including the first.
- */
- /* Find the node we are going to overwrite */
- if ( first != startbranch || OP( last ) == BRANCH ) {
- /* branch sub-chain */
- NEXT_OFF( first ) = (U16)(last - first);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_r({
- mjd_offset= Node_Offset((convert));
- mjd_nodelen= Node_Length((convert));
- });
-#endif
- /* whole branch chain */
- }
-#ifdef RE_TRACK_PATTERN_OFFSETS
- else {
- DEBUG_r({
- const regnode *nop = NEXTOPER( convert );
- mjd_offset= Node_Offset((nop));
- mjd_nodelen= Node_Length((nop));
- });
- }
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%*sMJD offset:%"UVuf" MJD length:%"UVuf"\n",
- (int)depth * 2 + 2, "",
- (UV)mjd_offset, (UV)mjd_nodelen)
- );
-#endif
- /* But first we check to see if there is a common prefix we can
- split out as an EXACT and put in front of the TRIE node. */
- trie->startstate= 1;
- if ( trie->bitmap && !widecharmap && !trie->jump ) {
- U32 state;
- for ( state = 1 ; state < trie->statecount-1 ; state++ ) {
- U32 ofs = 0;
- I32 idx = -1;
- U32 count = 0;
- const U32 base = trie->states[ state ].trans.base;
-
- if ( trie->states[state].wordnum )
- count = 1;
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- if ( ++count > 1 ) {
- SV **tmp = av_fetch( revcharmap, ofs, 0);
- const U8 *ch = (U8*)SvPV_nolen_const( *tmp );
- if ( state == 1 ) break;
- if ( count == 2 ) {
- Zero(trie->bitmap, ANYOF_BITMAP_SIZE, char);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*sNew Start State=%"UVuf" Class: [",
- (int)depth * 2 + 2, "",
- (UV)state));
- if (idx >= 0) {
- SV ** const tmp = av_fetch( revcharmap, idx, 0);
- const U8 * const ch = (U8*)SvPV_nolen_const( *tmp );
-
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie, folder[ *ch ]);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%s", (char*)ch)
- );
- }
- }
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie,folder[ *ch ]);
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"%s", ch));
- }
- idx = ofs;
- }
- }
- if ( count == 1 ) {
- SV **tmp = av_fetch( revcharmap, idx, 0);
- STRLEN len;
- char *ch = SvPV( *tmp, len );
- DEBUG_OPTIMISE_r({
- SV *sv=sv_newmortal();
- PerlIO_printf( Perl_debug_log,
- "%*sPrefix State: %"UVuf" Idx:%"UVuf" Char='%s'\n",
- (int)depth * 2 + 2, "",
- (UV)state, (UV)idx,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 6,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- });
- if ( state==1 ) {
- OP( convert ) = nodetype;
- str=STRING(convert);
- STR_LEN(convert)=0;
- }
- STR_LEN(convert) += len;
- while (len--)
- *str++ = *ch++;
- } else {
-#ifdef DEBUGGING
- if (state>1)
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"]\n"));
-#endif
- break;
- }
- }
- if (str) {
- regnode *n = convert+NODE_SZ_STR(convert);
- NEXT_OFF(convert) = NODE_SZ_STR(convert);
- trie->startstate = state;
- trie->minlen -= (state - 1);
- trie->maxlen -= (state - 1);
-#ifdef DEBUGGING
- /* At least the UNICOS C compiler choked on this
- * being argument to DEBUG_r(), so let's just have
- * it right here. */
- if (
-#ifdef PERL_EXT_RE_BUILD
- 1
-#else
- DEBUG_r_TEST
-#endif
- ) {
- regnode *fix = convert;
- U32 word = trie->wordcount;
- mjd_nodelen++;
- Set_Node_Offset_Length(convert, mjd_offset, state - 1);
- while( ++fix < n ) {
- Set_Node_Offset_Length(fix, 0, 0);
- }
- while (word--) {
- SV ** const tmp = av_fetch( trie_words, word, 0 );
- if (tmp) {
- if ( STR_LEN(convert) <= SvCUR(*tmp) )
- sv_chop(*tmp, SvPV_nolen(*tmp) + STR_LEN(convert));
- else
- sv_chop(*tmp, SvPV_nolen(*tmp) + SvCUR(*tmp));
- }
- }
- }
-#endif
- if (trie->maxlen) {
- convert = n;
- } else {
- NEXT_OFF(convert) = (U16)(tail - convert);
- DEBUG_r(optimize= n);
- }
- }
- }
- if (!jumper)
- jumper = last;
- if ( trie->maxlen ) {
- NEXT_OFF( convert ) = (U16)(tail - convert);
- ARG_SET( convert, data_slot );
- /* Store the offset to the first unabsorbed branch in
- jump[0], which is otherwise unused by the jump logic.
- We use this when dumping a trie and during optimisation. */
- if (trie->jump)
- trie->jump[0] = (U16)(nextbranch - convert);
-
- /* XXXX */
- if ( !trie->states[trie->startstate].wordnum && trie->bitmap &&
- ( (char *)jumper - (char *)convert) >= (int)sizeof(struct regnode_charclass) )
- {
- OP( convert ) = TRIEC;
- Copy(trie->bitmap, ((struct regnode_charclass *)convert)->bitmap, ANYOF_BITMAP_SIZE, char);
- PerlMemShared_free(trie->bitmap);
- trie->bitmap= NULL;
- } else
- OP( convert ) = TRIE;
-
- /* store the type in the flags */
- convert->flags = nodetype;
- DEBUG_r({
- optimize = convert
- + NODE_STEP_REGNODE
- + regarglen[ OP( convert ) ];
- });
- /* XXX We really should free up the resource in trie now,
- as we won't use them - (which resources?) dmq */
- }
- /* needed for dumping*/
- DEBUG_r(if (optimize) {
- regnode *opt = convert;
-
- while ( ++opt < optimize) {
- Set_Node_Offset_Length(opt,0,0);
- }
- /*
- Try to clean up some of the debris left after the
- optimisation.
- */
- while( optimize < jumper ) {
- mjd_nodelen += Node_Length((optimize));
- OP( optimize ) = OPTIMIZED;
- Set_Node_Offset_Length(optimize,0,0);
- optimize++;
- }
- Set_Node_Offset_Length(convert,mjd_offset,mjd_nodelen);
- });
- } /* end node insert */
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, convert);
- RExC_rxi->data->data[ data_slot + 1 ] = (void*)widecharmap;
-#ifdef DEBUGGING
- RExC_rxi->data->data[ data_slot + TRIE_WORDS_OFFSET ] = (void*)trie_words;
- RExC_rxi->data->data[ data_slot + 3 ] = (void*)revcharmap;
-#else
- SvREFCNT_dec(revcharmap);
-#endif
- return trie->jump
- ? MADE_JUMP_TRIE
- : trie->startstate>1
- ? MADE_EXACT_TRIE
- : MADE_TRIE;
-}
-
-STATIC void
-S_make_trie_failtable(pTHX_ RExC_state_t *pRExC_state, regnode *source, regnode *stclass, U32 depth)
-{
-/* The Trie is constructed and compressed now so we can build a fail array now if its needed
-
- This is basically the Aho-Corasick algorithm. Its from exercise 3.31 and 3.32 in the
- "Red Dragon" -- Compilers, principles, techniques, and tools. Aho, Sethi, Ullman 1985/88
- ISBN 0-201-10088-6
-
- We find the fail state for each state in the trie, this state is the longest proper
- suffix of the current states 'word' that is also a proper prefix of another word in our
- trie. State 1 represents the word '' and is the thus the default fail state. This allows
- the DFA not to have to restart after its tried and failed a word at a given point, it
- simply continues as though it had been matching the other word in the first place.
- Consider
- 'abcdgu'=~/abcdefg|cdgu/
- When we get to 'd' we are still matching the first word, we would encounter 'g' which would
- fail, which would bring use to the state representing 'd' in the second word where we would
- try 'g' and succeed, prodceding to match 'cdgu'.
- */
- /* add a fail transition */
- const U32 trie_offset = ARG(source);
- reg_trie_data *trie=(reg_trie_data *)RExC_rxi->data->data[trie_offset];
- U32 *q;
- const U32 ucharcount = trie->uniquecharcount;
- const U32 numstates = trie->statecount;
- const U32 ubound = trie->lasttrans + ucharcount;
- U32 q_read = 0;
- U32 q_write = 0;
- U32 charid;
- U32 base = trie->states[ 1 ].trans.base;
- U32 *fail;
- reg_ac_data *aho;
- const U32 data_slot = add_data( pRExC_state, 1, "T" );
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE_FAILTABLE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
-
- ARG_SET( stclass, data_slot );
- aho = (reg_ac_data *) PerlMemShared_calloc( 1, sizeof(reg_ac_data) );
- RExC_rxi->data->data[ data_slot ] = (void*)aho;
- aho->trie=trie_offset;
- aho->states=(reg_trie_state *)PerlMemShared_malloc( numstates * sizeof(reg_trie_state) );
- Copy( trie->states, aho->states, numstates, reg_trie_state );
- Newxz( q, numstates, U32);
- aho->fail = (U32 *) PerlMemShared_calloc( numstates, sizeof(U32) );
- aho->refcount = 1;
- fail = aho->fail;
- /* initialize fail[0..1] to be 1 so that we always have
- a valid final fail state */
- fail[ 0 ] = fail[ 1 ] = 1;
-
- for ( charid = 0; charid < ucharcount ; charid++ ) {
- const U32 newstate = TRIE_TRANS_STATE( 1, base, ucharcount, charid, 0 );
- if ( newstate ) {
- q[ q_write ] = newstate;
- /* set to point at the root */
- fail[ q[ q_write++ ] ]=1;
- }
- }
- while ( q_read < q_write) {
- const U32 cur = q[ q_read++ % numstates ];
- base = trie->states[ cur ].trans.base;
-
- for ( charid = 0 ; charid < ucharcount ; charid++ ) {
- const U32 ch_state = TRIE_TRANS_STATE( cur, base, ucharcount, charid, 1 );
- if (ch_state) {
- U32 fail_state = cur;
- U32 fail_base;
- do {
- fail_state = fail[ fail_state ];
- fail_base = aho->states[ fail_state ].trans.base;
- } while ( !TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ) );
-
- fail_state = TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 );
- fail[ ch_state ] = fail_state;
- if ( !aho->states[ ch_state ].wordnum && aho->states[ fail_state ].wordnum )
- {
- aho->states[ ch_state ].wordnum = aho->states[ fail_state ].wordnum;
- }
- q[ q_write++ % numstates] = ch_state;
- }
- }
- }
- /* restore fail[0..1] to 0 so that we "fall out" of the AC loop
- when we fail in state 1, this allows us to use the
- charclass scan to find a valid start char. This is based on the principle
- that theres a good chance the string being searched contains lots of stuff
- that cant be a start char.
- */
- fail[ 0 ] = fail[ 1 ] = 0;
- DEBUG_TRIE_COMPILE_r({
- PerlIO_printf(Perl_debug_log,
- "%*sStclass Failtable (%"UVuf" states): 0",
- (int)(depth * 2), "", (UV)numstates
- );
- for( q_read=1; q_read<numstates; q_read++ ) {
- PerlIO_printf(Perl_debug_log, ", %"UVuf, (UV)fail[q_read]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
- Safefree(q);
- /*RExC_seen |= REG_SEEN_TRIEDFA;*/
-}
-
-
-/*
- * There are strange code-generation bugs caused on sparc64 by gcc-2.95.2.
- * These need to be revisited when a newer toolchain becomes available.
- */
-#if defined(__sparc64__) && defined(__GNUC__)
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
-# undef SPARC64_GCC_WORKAROUND
-# define SPARC64_GCC_WORKAROUND 1
-# endif
-#endif
-
-#define DEBUG_PEEP(str,scan,depth) \
- DEBUG_OPTIMISE_r({if (scan){ \
- SV * const mysv=sv_newmortal(); \
- regnode *Next = regnext(scan); \
- regprop(RExC_rx, mysv, scan); \
- PerlIO_printf(Perl_debug_log, "%*s" str ">%3d: %s (%d)\n", \
- (int)depth*2, "", REG_NODE_NUM(scan), SvPV_nolen_const(mysv),\
- Next ? (REG_NODE_NUM(Next)) : 0 ); \
- }});
-
-
-
-
-
-#define JOIN_EXACT(scan,min,flags) \
- if (PL_regkind[OP(scan)] == EXACT) \
- join_exact(pRExC_state,(scan),(min),(flags),NULL,depth+1)
-
-STATIC U32
-S_join_exact(pTHX_ RExC_state_t *pRExC_state, regnode *scan, I32 *min, U32 flags,regnode *val, U32 depth) {
- /* Merge several consecutive EXACTish nodes into one. */
- regnode *n = regnext(scan);
- U32 stringok = 1;
- regnode *next = scan + NODE_SZ_STR(scan);
- U32 merged = 0;
- U32 stopnow = 0;
-#ifdef DEBUGGING
- regnode *stop = scan;
- GET_RE_DEBUG_FLAGS_DECL;
-#else
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_JOIN_EXACT;
-#ifndef EXPERIMENTAL_INPLACESCAN
- PERL_UNUSED_ARG(flags);
- PERL_UNUSED_ARG(val);
-#endif
- DEBUG_PEEP("join",scan,depth);
-
- /* Skip NOTHING, merge EXACT*. */
- while (n &&
- ( PL_regkind[OP(n)] == NOTHING ||
- (stringok && (OP(n) == OP(scan))))
- && NEXT_OFF(n)
- && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) {
-
- if (OP(n) == TAIL || n > next)
- stringok = 0;
- if (PL_regkind[OP(n)] == NOTHING) {
- DEBUG_PEEP("skip:",n,depth);
- NEXT_OFF(scan) += NEXT_OFF(n);
- next = n + NODE_STEP_REGNODE;
-#ifdef DEBUGGING
- if (stringok)
- stop = n;
-#endif
- n = regnext(n);
- }
- else if (stringok) {
- const unsigned int oldl = STR_LEN(scan);
- regnode * const nnext = regnext(n);
-
- DEBUG_PEEP("merg",n,depth);
-
- merged++;
- if (oldl + STR_LEN(n) > U8_MAX)
- break;
- NEXT_OFF(scan) += NEXT_OFF(n);
- STR_LEN(scan) += STR_LEN(n);
- next = n + NODE_SZ_STR(n);
- /* Now we can overwrite *n : */
- Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char);
-#ifdef DEBUGGING
- stop = next - 1;
-#endif
- n = nnext;
- if (stopnow) break;
- }
-
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (flags && !NEXT_OFF(n)) {
- DEBUG_PEEP("atch", val, depth);
- if (reg_off_by_arg[OP(n)]) {
- ARG_SET(n, val - n);
- }
- else {
- NEXT_OFF(n) = val - n;
- }
- stopnow = 1;
- }
-#endif
- }
-
- if (UTF && ( OP(scan) == EXACTF ) && ( STR_LEN(scan) >= 6 ) ) {
- /*
- Two problematic code points in Unicode casefolding of EXACT nodes:
-
- U+0390 - GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS
- U+03B0 - GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS
-
- which casefold to
-
- Unicode UTF-8
-
- U+03B9 U+0308 U+0301 0xCE 0xB9 0xCC 0x88 0xCC 0x81
- U+03C5 U+0308 U+0301 0xCF 0x85 0xCC 0x88 0xCC 0x81
-
- This means that in case-insensitive matching (or "loose matching",
- as Unicode calls it), an EXACTF of length six (the UTF-8 encoded byte
- length of the above casefolded versions) can match a target string
- of length two (the byte length of UTF-8 encoded U+0390 or U+03B0).
- This would rather mess up the minimum length computation.
-
- What we'll do is to look for the tail four bytes, and then peek
- at the preceding two bytes to see whether we need to decrease
- the minimum length by four (six minus two).
-
- Thanks to the design of UTF-8, there cannot be false matches:
- A sequence of valid UTF-8 bytes cannot be a subsequence of
- another valid sequence of UTF-8 bytes.
-
- */
- char * const s0 = STRING(scan), *s, *t;
- char * const s1 = s0 + STR_LEN(scan) - 1;
- char * const s2 = s1 - 4;
-#ifdef EBCDIC /* RD tunifold greek 0390 and 03B0 */
- const char t0[] = "\xaf\x49\xaf\x42";
-#else
- const char t0[] = "\xcc\x88\xcc\x81";
-#endif
- const char * const t1 = t0 + 3;
-
- for (s = s0 + 2;
- s < s2 && (t = ninstr(s, s1, t0, t1));
- s = t + 4) {
-#ifdef EBCDIC
- if (((U8)t[-1] == 0x68 && (U8)t[-2] == 0xB4) ||
- ((U8)t[-1] == 0x46 && (U8)t[-2] == 0xB5))
-#else
- if (((U8)t[-1] == 0xB9 && (U8)t[-2] == 0xCE) ||
- ((U8)t[-1] == 0x85 && (U8)t[-2] == 0xCF))
-#endif
- *min -= 4;
- }
- }
-
-#ifdef DEBUGGING
- /* Allow dumping */
- n = scan + NODE_SZ_STR(scan);
- while (n <= stop) {
- if (PL_regkind[OP(n)] != NOTHING || OP(n) == NOTHING) {
- OP(n) = OPTIMIZED;
- NEXT_OFF(n) = 0;
- }
- n++;
- }
-#endif
- DEBUG_OPTIMISE_r(if (merged){DEBUG_PEEP("finl",scan,depth)});
- return stopnow;
-}
-
-/* REx optimizer. Converts nodes into quickier variants "in place".
- Finds fixed substrings. */
-
-/* Stops at toplevel WHILEM as well as at "last". At end *scanp is set
- to the position after last scanned or to NULL. */
-
-#define INIT_AND_WITHP \
- assert(!and_withp); \
- Newx(and_withp,1,struct regnode_charclass_class); \
- SAVEFREEPV(and_withp)
-
-/* this is a chain of data about sub patterns we are processing that
- need to be handled seperately/specially in study_chunk. Its so
- we can simulate recursion without losing state. */
-struct scan_frame;
-typedef struct scan_frame {
- regnode *last; /* last node to process in this frame */
- regnode *next; /* next node to process when last is reached */
- struct scan_frame *prev; /*previous frame*/
- I32 stop; /* what stopparen do we use */
-} scan_frame;
-
-
-#define SCAN_COMMIT(s, data, m) scan_commit(s, data, m, is_inf)
-
-#define CASE_SYNST_FNC(nAmE) \
-case nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break; \
-case N ## nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break
-
-
-
-STATIC I32
-S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp,
- I32 *minlenp, I32 *deltap,
- regnode *last,
- scan_data_t *data,
- I32 stopparen,
- U8* recursed,
- struct regnode_charclass_class *and_withp,
- U32 flags, U32 depth)
- /* scanp: Start here (read-write). */
- /* deltap: Write maxlen-minlen here. */
- /* last: Stop before this one. */
- /* data: string data about the pattern */
- /* stopparen: treat close N as END */
- /* recursed: which subroutines have we recursed into */
- /* and_withp: Valid if flags & SCF_DO_STCLASS_OR */
-{
- dVAR;
- I32 min = 0, pars = 0, code;
- regnode *scan = *scanp, *next;
- I32 delta = 0;
- int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF);
- int is_inf_internal = 0; /* The studied chunk is infinite */
- I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0;
- scan_data_t data_fake;
- SV *re_trie_maxbuff = NULL;
- regnode *first_non_open = scan;
- I32 stopmin = I32_MAX;
- scan_frame *frame = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_STUDY_CHUNK;
-
-#ifdef DEBUGGING
- StructCopy(&zero_scan_data, &data_fake, scan_data_t);
-#endif
-
- if ( depth == 0 ) {
- while (first_non_open && OP(first_non_open) == OPEN)
- first_non_open=regnext(first_non_open);
- }
-
-
- fake_study_recurse:
- while ( scan && OP(scan) != END && scan < last ){
- /* Peephole optimizer: */
- DEBUG_STUDYDATA("Peep:", data,depth);
- DEBUG_PEEP("Peep",scan,depth);
- JOIN_EXACT(scan,&min,0);
-
- /* Follow the next-chain of the current node and optimize
- away all the NOTHINGs from it. */
- if (OP(scan) != CURLYX) {
- const int max = (reg_off_by_arg[OP(scan)]
- ? I32_MAX
- /* I32 may be smaller than U16 on CRAYs! */
- : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX));
- int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan));
- int noff;
- regnode *n = scan;
-
- /* Skip NOTHING and LONGJMP. */
- while ((n = regnext(n))
- && ((PL_regkind[OP(n)] == NOTHING && (noff = NEXT_OFF(n)))
- || ((OP(n) == LONGJMP) && (noff = ARG(n))))
- && off + noff < max)
- off += noff;
- if (reg_off_by_arg[OP(scan)])
- ARG(scan) = off;
- else
- NEXT_OFF(scan) = off;
- }
-
-
-
- /* The principal pseudo-switch. Cannot be a switch, since we
- look into several different things. */
- if (OP(scan) == BRANCH || OP(scan) == BRANCHJ
- || OP(scan) == IFTHEN) {
- next = regnext(scan);
- code = OP(scan);
- /* demq: the op(next)==code check is to see if we have "branch-branch" AFAICT */
-
- if (OP(next) == code || code == IFTHEN) {
- /* NOTE - There is similar code to this block below for handling
- TRIE nodes on a re-study. If you change stuff here check there
- too. */
- I32 max1 = 0, min1 = I32_MAX, num = 0;
- struct regnode_charclass_class accum;
- regnode * const startbranch=scan;
-
- if (flags & SCF_DO_SUBSTR)
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- while (OP(scan) == code) {
- I32 deltanext, minnext, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- num++;
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
-
- data_fake.pos_delta = delta;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- if (code != BRANCH)
- scan = NEXTOPER(scan);
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- /* we suppose the run is continuous, last=next...*/
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- next, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- if (min1 > minnext)
- min1 = minnext;
- if (max1 < minnext + deltanext)
- max1 = minnext + deltanext;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
- scan = next;
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > minnext)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- if (code == IFTHEN && num < 2) /* Empty ELSE branch */
- min1 = 0;
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
-
- if (PERL_ENABLE_TRIE_OPTIMISATION && OP( startbranch ) == BRANCH ) {
- /* demq.
-
- Assuming this was/is a branch we are dealing with: 'scan' now
- points at the item that follows the branch sequence, whatever
- it is. We now start at the beginning of the sequence and look
- for subsequences of
-
- BRANCH->EXACT=>x1
- BRANCH->EXACT=>x2
- tail
-
- which would be constructed from a pattern like /A|LIST|OF|WORDS/
-
- If we can find such a subseqence we need to turn the first
- element into a trie and then add the subsequent branch exact
- strings to the trie.
-
- We have two cases
-
- 1. patterns where the whole set of branch can be converted.
-
- 2. patterns where only a subset can be converted.
-
- In case 1 we can replace the whole set with a single regop
- for the trie. In case 2 we need to keep the start and end
- branchs so
-
- 'BRANCH EXACT; BRANCH EXACT; BRANCH X'
- becomes BRANCH TRIE; BRANCH X;
-
- There is an additional case, that being where there is a
- common prefix, which gets split out into an EXACT like node
- preceding the TRIE node.
-
- If x(1..n)==tail then we can do a simple trie, if not we make
- a "jump" trie, such that when we match the appropriate word
- we "jump" to the appopriate tail node. Essentailly we turn
- a nested if into a case structure of sorts.
-
- */
-
- int made=0;
- if (!re_trie_maxbuff) {
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff))
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- if ( SvIV(re_trie_maxbuff)>=0 ) {
- regnode *cur;
- regnode *first = (regnode *)NULL;
- regnode *last = (regnode *)NULL;
- regnode *tail = scan;
- U8 optype = 0;
- U32 count=0;
-
-#ifdef DEBUGGING
- SV * const mysv = sv_newmortal(); /* for dumping */
-#endif
- /* var tail is used because there may be a TAIL
- regop in the way. Ie, the exacts will point to the
- thing following the TAIL, but the last branch will
- point at the TAIL. So we advance tail. If we
- have nested (?:) we may have to move through several
- tails.
- */
-
- while ( OP( tail ) == TAIL ) {
- /* this is the TAIL generated by (?:) */
- tail = regnext( tail );
- }
-
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, tail );
- PerlIO_printf( Perl_debug_log, "%*s%s%s\n",
- (int)depth * 2 + 2, "",
- "Looking for TRIE'able sequences. Tail node is: ",
- SvPV_nolen_const( mysv )
- );
- });
-
- /*
-
- step through the branches, cur represents each
- branch, noper is the first thing to be matched
- as part of that branch and noper_next is the
- regnext() of that node. if noper is an EXACT
- and noper_next is the same as scan (our current
- position in the regex) then the EXACT branch is
- a possible optimization target. Once we have
- two or more consequetive such branches we can
- create a trie of the EXACT's contents and stich
- it in place. If the sequence represents all of
- the branches we eliminate the whole thing and
- replace it with a single TRIE. If it is a
- subsequence then we need to stitch it in. This
- means the first branch has to remain, and needs
- to be repointed at the item on the branch chain
- following the last branch optimized. This could
- be either a BRANCH, in which case the
- subsequence is internal, or it could be the
- item following the branch sequence in which
- case the subsequence is at the end.
-
- */
-
- /* dont use tail as the end marker for this traverse */
- for ( cur = startbranch ; cur != scan ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
-#if defined(DEBUGGING) || defined(NOJUMPTRIE)
- regnode * const noper_next = regnext( noper );
-#endif
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log, "%*s- %s (%d)",
- (int)depth * 2 + 2,"", SvPV_nolen_const( mysv ), REG_NODE_NUM(cur) );
-
- regprop(RExC_rx, mysv, noper);
- PerlIO_printf( Perl_debug_log, " -> %s",
- SvPV_nolen_const(mysv));
-
- if ( noper_next ) {
- regprop(RExC_rx, mysv, noper_next );
- PerlIO_printf( Perl_debug_log,"\t=> %s\t",
- SvPV_nolen_const(mysv));
- }
- PerlIO_printf( Perl_debug_log, "(First==%d,Last==%d,Cur==%d)\n",
- REG_NODE_NUM(first), REG_NODE_NUM(last), REG_NODE_NUM(cur) );
- });
- if ( (((first && optype!=NOTHING) ? OP( noper ) == optype
- : PL_regkind[ OP( noper ) ] == EXACT )
- || OP(noper) == NOTHING )
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- && count < U16_MAX)
- {
- count++;
- if ( !first || optype == NOTHING ) {
- if (!first) first = cur;
- optype = OP( noper );
- } else {
- last = cur;
- }
- } else {
-/*
- Currently we assume that the trie can handle unicode and ascii
- matches fold cased matches. If this proves true then the following
- define will prevent tries in this situation.
-
- #define TRIE_TYPE_IS_SAFE (UTF || optype==EXACT)
-*/
-#define TRIE_TYPE_IS_SAFE 1
- if ( last && TRIE_TYPE_IS_SAFE ) {
- make_trie( pRExC_state,
- startbranch, first, cur, tail, count,
- optype, depth+1 );
- }
- if ( PL_regkind[ OP( noper ) ] == EXACT
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- ){
- count = 1;
- first = cur;
- optype = OP( noper );
- } else {
- count = 0;
- first = NULL;
- optype = 0;
- }
- last = NULL;
- }
- }
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log,
- "%*s- %s (%d) <SCAN FINISHED>\n", (int)depth * 2 + 2,
- "", SvPV_nolen_const( mysv ),REG_NODE_NUM(cur));
-
- });
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- made= make_trie( pRExC_state, startbranch, first, scan, tail, count, optype, depth+1 );
-#ifdef TRIE_STUDY_OPT
- if ( ((made == MADE_EXACT_TRIE &&
- startbranch == first)
- || ( first_non_open == first )) &&
- depth==0 ) {
- flags |= SCF_TRIE_RESTUDY;
- if ( startbranch == first
- && scan == tail )
- {
- RExC_seen &=~REG_TOP_LEVEL_BRANCHES;
- }
- }
-#endif
- }
- }
-
- } /* do trie */
-
- }
- else if ( code == BRANCHJ ) { /* single branch is optimized. */
- scan = NEXTOPER(NEXTOPER(scan));
- } else /* single branch is optimized. */
- scan = NEXTOPER(scan);
- continue;
- } else if (OP(scan) == SUSPEND || OP(scan) == GOSUB || OP(scan) == GOSTART) {
- scan_frame *newframe = NULL;
- I32 paren;
- regnode *start;
- regnode *end;
-
- if (OP(scan) != SUSPEND) {
- /* set the pointer */
- if (OP(scan) == GOSUB) {
- paren = ARG(scan);
- RExC_recurse[ARG2L(scan)] = scan;
- start = RExC_open_parens[paren-1];
- end = RExC_close_parens[paren-1];
- } else {
- paren = 0;
- start = RExC_rxi->program + 1;
- end = RExC_opend;
- }
- if (!recursed) {
- Newxz(recursed, (((RExC_npar)>>3) +1), U8);
- SAVEFREEPV(recursed);
- }
- if (!PAREN_TEST(recursed,paren+1)) {
- PAREN_SET(recursed,paren+1);
- Newx(newframe,1,scan_frame);
- } else {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- } else {
- Newx(newframe,1,scan_frame);
- paren = stopparen;
- start = scan+2;
- end = regnext(scan);
- }
- if (newframe) {
- assert(start);
- assert(end);
- SAVEFREEPV(newframe);
- newframe->next = regnext(scan);
- newframe->last = last;
- newframe->stop = stopparen;
- newframe->prev = frame;
-
- frame = newframe;
- scan = start;
- stopparen = paren;
- last = end;
-
- continue;
- }
- }
- else if (OP(scan) == EXACT) {
- I32 l = STR_LEN(scan);
- UV uc;
- if (UTF) {
- const U8 * const s = (U8*)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- } else {
- uc = *((U8*)STRING(scan));
- }
- min += l;
- if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */
- /* The code below prefers earlier match for fixed
- offset, later match for variable offset. */
- if (data->last_end == -1) { /* Update the start info. */
- data->last_start_min = data->pos_min;
- data->last_start_max = is_inf
- ? I32_MAX : data->pos_min + data->pos_delta;
- }
- sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan));
- if (UTF)
- SvUTF8_on(data->last_found);
- {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += utf8_length((U8*)STRING(scan),
- (U8*)STRING(scan)+STR_LEN(scan));
- }
- data->last_end = data->pos_min + l;
- data->pos_min += l; /* As in the first entry. */
- data->flags &= ~SF_BEFORE_EOL;
- }
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && (!(data->start_class->flags & ANYOF_FOLD)
- || !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- )
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- if (uc < 0x100)
- data->start_class->flags &= ~ANYOF_UNICODE_ALL;
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- /* false positive possible if the class is case-folded */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- else
- data->start_class->flags |= ANYOF_UNICODE_ALL;
- data->start_class->flags &= ~ANYOF_EOS;
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (PL_regkind[OP(scan)] == EXACT) { /* But OP != EXACT! */
- I32 l = STR_LEN(scan);
- UV uc = *((U8*)STRING(scan));
-
- /* Search for fixed substrings supports EXACT only. */
- if (flags & SCF_DO_SUBSTR) {
- assert(data);
- SCAN_COMMIT(pRExC_state, data, minlenp);
- }
- if (UTF) {
- const U8 * const s = (U8 *)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- }
- min += l;
- if (flags & SCF_DO_SUBSTR)
- data->pos_min += l;
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat) {
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- data->start_class->flags |= ANYOF_FOLD;
- if (OP(scan) == EXACTFL)
- data->start_class->flags |= ANYOF_LOCALE;
- }
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- if (data->start_class->flags & ANYOF_FOLD) {
- /* false positive possible if the class is case-folded.
- Assume that the locale settings are the same... */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- }
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (strchr((const char*)PL_varies,OP(scan))) {
- I32 mincount, maxcount, minnext, deltanext, fl = 0;
- I32 f = flags, pos_before = 0;
- regnode * const oscan = scan;
- struct regnode_charclass_class this_class;
- struct regnode_charclass_class *oclass = NULL;
- I32 next_is_eval = 0;
-
- switch (PL_regkind[OP(scan)]) {
- case WHILEM: /* End of (?:...)* . */
- scan = NEXTOPER(scan);
- goto finish;
- case PLUS:
- if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) {
- next = NEXTOPER(scan);
- if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) {
- mincount = 1;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- }
- if (flags & SCF_DO_SUBSTR)
- data->pos_min++;
- min++;
- /* Fall through. */
- case STAR:
- if (flags & SCF_DO_STCLASS) {
- mincount = 0;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- is_inf = is_inf_internal = 1;
- scan = regnext(scan);
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot extend fixed substrings */
- data->longest = &(data->longest_float);
- }
- goto optimize_curly_tail;
- case CURLY:
- if (stopparen>0 && (OP(scan)==CURLYN || OP(scan)==CURLYM)
- && (scan->flags == stopparen))
- {
- mincount = 1;
- maxcount = 1;
- } else {
- mincount = ARG1(scan);
- maxcount = ARG2(scan);
- }
- next = regnext(scan);
- if (OP(scan) == CURLYX) {
- I32 lp = (data ? *(data->last_closep) : 0);
- scan->flags = ((lp <= (I32)U8_MAX) ? (U8)lp : U8_MAX);
- }
- scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- next_is_eval = (OP(scan) == EVAL);
- do_curly:
- if (flags & SCF_DO_SUBSTR) {
- if (mincount == 0) SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot extend fixed substrings */
- pos_before = data->pos_min;
- }
- if (data) {
- fl = data->flags;
- data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL);
- if (is_inf)
- data->flags |= SF_IS_INF;
- }
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- oclass = data->start_class;
- data->start_class = &this_class;
- f |= SCF_DO_STCLASS_AND;
- f &= ~SCF_DO_STCLASS_OR;
- }
- /* These are the cases when once a subexpression
- fails at a particular position, it cannot succeed
- even after backtracking at the enclosing scope.
-
- XXXX what if minimal match and we are at the
- initial run of {n,m}? */
- if ((mincount != maxcount - 1) && (maxcount != REG_INFTY))
- f &= ~SCF_WHILEM_VISITED_POS;
-
- /* This will finish on WHILEM, setting scan, or on NULL: */
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- last, data, stopparen, recursed, NULL,
- (mincount == 0
- ? (f & ~SCF_DO_SUBSTR) : f),depth+1);
-
- if (flags & SCF_DO_STCLASS)
- data->start_class = oclass;
- if (mincount == 0 || minnext == 0) {
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&this_class, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- } else { /* Non-zero len */
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- cl_and(data->start_class, and_withp);
- }
- else if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class, &this_class);
- flags &= ~SCF_DO_STCLASS;
- }
- if (!scan) /* It was not CURLYX, but CURLY. */
- scan = next;
- if ( /* ? quantifier ok, except for (?{ ... }) */
- (next_is_eval || !(mincount == 0 && maxcount == 1))
- && (minnext == 0) && (deltanext == 0)
- && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR))
- && maxcount <= REG_INFTY/3 /* Complement check for big count */
- && ckWARN(WARN_REGEXP))
- {
- vWARN(RExC_parse,
- "Quantifier unexpected on zero-length expression");
- }
-
- min += minnext * mincount;
- is_inf_internal |= ((maxcount == REG_INFTY
- && (minnext + deltanext) > 0)
- || deltanext == I32_MAX);
- is_inf |= is_inf_internal;
- delta += (minnext + deltanext) * maxcount - minnext * mincount;
-
- /* Try powerful optimization CURLYX => CURLYN. */
- if ( OP(oscan) == CURLYX && data
- && data->flags & SF_IN_PAR
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext && minnext == 1 ) {
- /* Try to optimize to CURLYN. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS;
- regnode * const nxt1 = nxt;
-#ifdef DEBUGGING
- regnode *nxt2;
-#endif
-
- /* Skip open. */
- nxt = regnext(nxt);
- if (!strchr((const char*)PL_simple,OP(nxt))
- && !(PL_regkind[OP(nxt)] == EXACT
- && STR_LEN(nxt) == 1))
- goto nogo;
-#ifdef DEBUGGING
- nxt2 = nxt;
-#endif
- nxt = regnext(nxt);
- if (OP(nxt) != CLOSE)
- goto nogo;
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt+2; /*close->while*/
- }
- /* Now we know that nxt2 is the only contents: */
- oscan->flags = (U8)ARG(nxt);
- OP(oscan) = CURLYN;
- OP(nxt1) = NOTHING; /* was OPEN. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */
-#endif
- }
- nogo:
-
- /* Try optimization CURLYX => CURLYM. */
- if ( OP(oscan) == CURLYX && data
- && !(data->flags & SF_HAS_PAR)
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext /* atom is fixed width */
- && minnext != 0 /* CURLYM can't handle zero width */
- ) {
- /* XXXX How to optimize if data == 0? */
- /* Optimize to a simpler form. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */
- regnode *nxt2;
-
- OP(oscan) = CURLYM;
- while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/
- && (OP(nxt2) != WHILEM))
- nxt = nxt2;
- OP(nxt2) = SUCCEED; /* Whas WHILEM */
- /* Need to optimize away parenths. */
- if (data->flags & SF_IN_PAR) {
- /* Set the parenth number. */
- regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/
-
- if (OP(nxt) != CLOSE)
- FAIL("Panic opt close");
- oscan->flags = (U8)ARG(nxt);
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt2+1; /*close->NOTHING*/
- }
- OP(nxt1) = OPTIMIZED; /* was OPEN. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */
-#endif
-#if 0
- while ( nxt1 && (OP(nxt1) != WHILEM)) {
- regnode *nnxt = regnext(nxt1);
-
- if (nnxt == nxt) {
- if (reg_off_by_arg[OP(nxt1)])
- ARG_SET(nxt1, nxt2 - nxt1);
- else if (nxt2 - nxt1 < U16_MAX)
- NEXT_OFF(nxt1) = nxt2 - nxt1;
- else
- OP(nxt) = NOTHING; /* Cannot beautify */
- }
- nxt1 = nnxt;
- }
-#endif
- /* Optimize again: */
- study_chunk(pRExC_state, &nxt1, minlenp, &deltanext, nxt,
- NULL, stopparen, recursed, NULL, 0,depth+1);
- }
- else
- oscan->flags = 0;
- }
- else if ((OP(oscan) == CURLYX)
- && (flags & SCF_WHILEM_VISITED_POS)
- /* See the comment on a similar expression above.
- However, this time it not a subexpression
- we care about, but the expression itself. */
- && (maxcount == REG_INFTY)
- && data && ++data->whilem_c < 16) {
- /* This stays as CURLYX, we can put the count/of pair. */
- /* Find WHILEM (as in regexec.c) */
- regnode *nxt = oscan + NEXT_OFF(oscan);
-
- if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */
- nxt += ARG(nxt);
- PREVOPER(nxt)->flags = (U8)(data->whilem_c
- | (RExC_whilem_seen << 4)); /* On WHILEM */
- }
- if (data && fl & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (flags & SCF_DO_SUBSTR) {
- SV *last_str = NULL;
- int counted = mincount != 0;
-
- if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */
-#if defined(SPARC64_GCC_WORKAROUND)
- I32 b = 0;
- STRLEN l = 0;
- const char *s = NULL;
- I32 old = 0;
-
- if (pos_before >= data->last_start_min)
- b = pos_before;
- else
- b = data->last_start_min;
-
- l = 0;
- s = SvPV_const(data->last_found, l);
- old = b - data->last_start_min;
-
-#else
- I32 b = pos_before >= data->last_start_min
- ? pos_before : data->last_start_min;
- STRLEN l;
- const char * const s = SvPV_const(data->last_found, l);
- I32 old = b - data->last_start_min;
-#endif
-
- if (UTF)
- old = utf8_hop((U8*)s, old) - (U8*)s;
-
- l -= old;
- /* Get the added string: */
- last_str = newSVpvn_utf8(s + old, l, UTF);
- if (deltanext == 0 && pos_before == b) {
- /* What was added is a constant string */
- if (mincount > 1) {
- SvGROW(last_str, (mincount * l) + 1);
- repeatcpy(SvPVX(last_str) + l,
- SvPVX_const(last_str), l, mincount - 1);
- SvCUR_set(last_str, SvCUR(last_str) * mincount);
- /* Add additional parts. */
- SvCUR_set(data->last_found,
- SvCUR(data->last_found) - l);
- sv_catsv(data->last_found, last_str);
- {
- SV * sv = data->last_found;
- MAGIC *mg =
- SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += CHR_SVLEN(last_str) - l;
- }
- data->last_end += l * (mincount - 1);
- }
- } else {
- /* start offset must point into the last copy */
- data->last_start_min += minnext * (mincount - 1);
- data->last_start_max += is_inf ? I32_MAX
- : (maxcount - 1) * (minnext + data->pos_delta);
- }
- }
- /* It is counted once already... */
- data->pos_min += minnext * (mincount - counted);
- data->pos_delta += - counted * deltanext +
- (minnext + deltanext) * maxcount - minnext * mincount;
- if (mincount != maxcount) {
- /* Cannot extend fixed substrings found inside
- the group. */
- SCAN_COMMIT(pRExC_state,data,minlenp);
- if (mincount && last_str) {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
-
- if (mg)
- mg->mg_len = -1;
- sv_setsv(sv, last_str);
- data->last_end = data->pos_min;
- data->last_start_min =
- data->pos_min - CHR_SVLEN(last_str);
- data->last_start_max = is_inf
- ? I32_MAX
- : data->pos_min + data->pos_delta
- - CHR_SVLEN(last_str);
- }
- data->longest = &(data->longest_float);
- }
- SvREFCNT_dec(last_str);
- }
- if (data && (fl & SF_HAS_EVAL))
- data->flags |= SF_HAS_EVAL;
- optimize_curly_tail:
- if (OP(oscan) != CURLYX) {
- while (PL_regkind[OP(next = regnext(oscan))] == NOTHING
- && NEXT_OFF(next))
- NEXT_OFF(oscan) += NEXT_OFF(next);
- }
- continue;
- default: /* REF and CLUMP only? */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR)
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- break;
- }
- }
- else if (OP(scan) == LNBREAK) {
- if (flags & SCF_DO_STCLASS) {
- int value = 0;
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
- if (flags & SCF_DO_STCLASS_AND) {
- for (value = 0; value < 256; value++)
- if (!is_VERTWS_cp(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- for (value = 0; value < 256; value++)
- if (is_VERTWS_cp(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- min += 1;
- delta += 1;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += 1;
- data->longest = &(data->longest_float);
- }
-
- }
- else if (OP(scan) == FOLDCHAR) {
- int d = ARG(scan)==0xDF ? 1 : 2;
- flags &= ~SCF_DO_STCLASS;
- min += 1;
- delta += d;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += d;
- data->longest = &(data->longest_float);
- }
- }
- else if (strchr((const char*)PL_simple,OP(scan))) {
- int value = 0;
-
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->pos_min++;
- }
- min++;
- if (flags & SCF_DO_STCLASS) {
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
-
- /* Some of the logic below assumes that switching
- locale on will only add false positives. */
- switch (PL_regkind[OP(scan)]) {
- case SANY:
- default:
- do_default:
- /* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- break;
- case REG_ANY:
- if (OP(scan) == SANY)
- goto do_default;
- if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */
- value = (ANYOF_BITMAP_TEST(data->start_class,'\n')
- || (data->start_class->flags & ANYOF_CLASS));
- cl_anything(pRExC_state, data->start_class);
- }
- if (flags & SCF_DO_STCLASS_AND || !value)
- ANYOF_BITMAP_CLEAR(data->start_class,'\n');
- break;
- case ANYOF:
- if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class,
- (struct regnode_charclass_class*)scan);
- else
- cl_or(pRExC_state, data->start_class,
- (struct regnode_charclass_class*)scan);
- break;
- case ALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case ALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- }
- else {
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- data->start_class->flags |= ANYOF_LOCALE;
- }
- break;
- case NALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- }
- break;
- case SPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- else {
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case SPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- }
- break;
- case NSPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- else {
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NSPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- }
- break;
- case DIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT);
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NDIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT);
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- CASE_SYNST_FNC(VERTWS);
- CASE_SYNST_FNC(HORIZWS);
-
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (PL_regkind[OP(scan)] == EOL && flags & SCF_DO_SUBSTR) {
- data->flags |= (OP(scan) == MEOL
- ? SF_BEFORE_MEOL
- : SF_BEFORE_SEOL);
- }
- else if ( PL_regkind[OP(scan)] == BRANCHJ
- /* Lookbehind, or need to calculate parens/evals/stclass: */
- && (scan->flags || data || (flags & SCF_DO_STCLASS))
- && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) {
- if ( !PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- || OP(scan) == UNLESSM )
- {
- /* Negative Lookahead/lookbehind
- In this case we can't do fixed string optimisation.
- */
-
- I32 deltanext, minnext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
- minnext = study_chunk(pRExC_state, &nscan, minlenp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f, depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (minnext > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)minnext;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (f & SCF_DO_STCLASS_AND) {
- if (flags & SCF_DO_STCLASS_OR) {
- /* OR before, AND after: ideally we would recurse with
- * data_fake to get the AND applied by study of the
- * remainder of the pattern, and then derecurse;
- * *** HACK *** for now just treat as "no information".
- * See [perl #56690].
- */
- cl_init(pRExC_state, data->start_class);
- } else {
- /* AND before and after: combine and continue */
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- }
-#if PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- else {
- /* Positive Lookahead/lookbehind
- In this case we can do fixed string optimisation,
- but we must be careful about it. Note in the case of
- lookbehind the positions will be offset by the minimum
- length of the pattern, something we won't know about
- until after the recurse.
- */
- I32 deltanext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
- /* We use SAVEFREEPV so that when the full compile
- is finished perl will clean up the allocated
- minlens when its all done. This was we don't
- have to worry about freeing them when we know
- they wont be used, which would be a pain.
- */
- I32 *minnextp;
- Newx( minnextp, 1, I32 );
- SAVEFREEPV(minnextp);
-
- if (data) {
- StructCopy(data, &data_fake, scan_data_t);
- if ((flags & SCF_DO_SUBSTR) && data->last_found) {
- f |= SCF_DO_SUBSTR;
- if (scan->flags)
- SCAN_COMMIT(pRExC_state, &data_fake,minlenp);
- data_fake.last_found=newSVsv(data->last_found);
- }
- }
- else
- data_fake.last_closep = &fake;
- data_fake.flags = 0;
- data_fake.pos_delta = delta;
- if (is_inf)
- data_fake.flags |= SF_IS_INF;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
-
- *minnextp = study_chunk(pRExC_state, &nscan, minnextp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f,depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (*minnextp > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)*minnextp;
- }
-
- *minnextp += min;
-
- if (f & SCF_DO_STCLASS_AND) {
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- if ((flags & SCF_DO_SUBSTR) && data_fake.last_found) {
- if (RExC_rx->minlen<*minnextp)
- RExC_rx->minlen=*minnextp;
- SCAN_COMMIT(pRExC_state, &data_fake, minnextp);
- SvREFCNT_dec(data_fake.last_found);
-
- if ( data_fake.minlen_fixed != minlenp )
- {
- data->offset_fixed= data_fake.offset_fixed;
- data->minlen_fixed= data_fake.minlen_fixed;
- data->lookbehind_fixed+= scan->flags;
- }
- if ( data_fake.minlen_float != minlenp )
- {
- data->minlen_float= data_fake.minlen_float;
- data->offset_float_min=data_fake.offset_float_min;
- data->offset_float_max=data_fake.offset_float_max;
- data->lookbehind_float+= scan->flags;
- }
- }
- }
-
-
- }
-#endif
- }
- else if (OP(scan) == OPEN) {
- if (stopparen != (I32)ARG(scan))
- pars++;
- }
- else if (OP(scan) == CLOSE) {
- if (stopparen == (I32)ARG(scan)) {
- break;
- }
- if ((I32)ARG(scan) == is_par) {
- next = regnext(scan);
-
- if ( next && (OP(next) != WHILEM) && next < last)
- is_par = 0; /* Disable optimization */
- }
- if (data)
- *(data->last_closep) = ARG(scan);
- }
- else if (OP(scan) == EVAL) {
- if (data)
- data->flags |= SF_HAS_EVAL;
- }
- else if ( PL_regkind[OP(scan)] == ENDLIKE ) {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- flags &= ~SCF_DO_SUBSTR;
- }
- if (data && OP(scan)==ACCEPT) {
- data->flags |= SCF_SEEN_ACCEPT;
- if (stopmin > min)
- stopmin = min;
- }
- }
- else if (OP(scan) == LOGICAL && scan->flags == 2) /* Embedded follows */
- {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- else if (OP(scan) == GPOS) {
- if (!(RExC_rx->extflags & RXf_GPOS_FLOAT) &&
- !(delta || is_inf || (data && data->pos_delta)))
- {
- if (!(RExC_rx->extflags & RXf_ANCH) && (flags & SCF_DO_SUBSTR))
- RExC_rx->extflags |= RXf_ANCH_GPOS;
- if (RExC_rx->gofs < (U32)min)
- RExC_rx->gofs = min;
- } else {
- RExC_rx->extflags |= RXf_GPOS_FLOAT;
- RExC_rx->gofs = 0;
- }
- }
-#ifdef TRIE_STUDY_OPT
-#ifdef FULL_TRIE_STUDY
- else if (PL_regkind[OP(scan)] == TRIE) {
- /* NOTE - There is similar code to this block above for handling
- BRANCH nodes on the initial study. If you change stuff here
- check there too. */
- regnode *trie_node= scan;
- regnode *tail= regnext(scan);
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- I32 max1 = 0, min1 = I32_MAX;
- struct regnode_charclass_class accum;
-
- if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */
- SCAN_COMMIT(pRExC_state, data,minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- if (!trie->jump) {
- min1= trie->minlen;
- max1= trie->maxlen;
- } else {
- const regnode *nextbranch= NULL;
- U32 word;
-
- for ( word=1 ; word <= trie->wordcount ; word++)
- {
- I32 deltanext=0, minnext=0, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- if (trie->jump[word]) {
- if (!nextbranch)
- nextbranch = trie_node + trie->jump[0];
- scan= trie_node + trie->jump[word];
- /* We go from the jump point to the branch that follows
- it. Note this means we need the vestigal unused branches
- even though they arent otherwise used.
- */
- minnext = study_chunk(pRExC_state, &scan, minlenp,
- &deltanext, (regnode *)nextbranch, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode*)nextbranch);
-
- if (min1 > (I32)(minnext + trie->minlen))
- min1 = minnext + trie->minlen;
- if (max1 < (I32)(minnext + deltanext + trie->maxlen))
- max1 = minnext + deltanext + trie->maxlen;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
-
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > min + min1)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- }
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- scan= tail;
- continue;
- }
-#else
- else if (PL_regkind[OP(scan)] == TRIE) {
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- U8*bang=NULL;
-
- min += trie->minlen;
- delta += (trie->maxlen - trie->minlen);
- flags &= ~SCF_DO_STCLASS; /* xxx */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += trie->minlen;
- data->pos_delta += (trie->maxlen - trie->minlen);
- if (trie->maxlen != trie->minlen)
- data->longest = &(data->longest_float);
- }
- if (trie->jump) /* no more substrings -- for now /grr*/
- flags &= ~SCF_DO_SUBSTR;
- }
-#endif /* old or new */
-#endif /* TRIE_STUDY_OPT */
-
- /* Else: zero-length, ignore. */
- scan = regnext(scan);
- }
- if (frame) {
- last = frame->last;
- scan = frame->next;
- stopparen = frame->stop;
- frame = frame->prev;
- goto fake_study_recurse;
- }
-
- finish:
- assert(!frame);
- DEBUG_STUDYDATA("pre-fin:",data,depth);
-
- *scanp = scan;
- *deltap = is_inf_internal ? I32_MAX : delta;
- if (flags & SCF_DO_SUBSTR && is_inf)
- data->pos_delta = I32_MAX - data->pos_min;
- if (is_par > (I32)U8_MAX)
- is_par = 0;
- if (is_par && pars==1 && data) {
- data->flags |= SF_IN_PAR;
- data->flags &= ~SF_HAS_PAR;
- }
- else if (pars && data) {
- data->flags |= SF_HAS_PAR;
- data->flags &= ~SF_IN_PAR;
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- if (flags & SCF_TRIE_RESTUDY)
- data->flags |= SCF_TRIE_RESTUDY;
-
- DEBUG_STUDYDATA("post-fin:",data,depth);
-
- return min < stopmin ? min : stopmin;
-}
-
-STATIC U32
-S_add_data(RExC_state_t *pRExC_state, U32 n, const char *s)
-{
- U32 count = RExC_rxi->data ? RExC_rxi->data->count : 0;
-
- PERL_ARGS_ASSERT_ADD_DATA;
-
- Renewc(RExC_rxi->data,
- sizeof(*RExC_rxi->data) + sizeof(void*) * (count + n - 1),
- char, struct reg_data);
- if(count)
- Renew(RExC_rxi->data->what, count + n, U8);
- else
- Newx(RExC_rxi->data->what, n, U8);
- RExC_rxi->data->count = count + n;
- Copy(s, RExC_rxi->data->what + count, n, U8);
- return count;
-}
-
-/*XXX: todo make this not included in a non debugging perl */
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_reginitcolors(pTHX)
-{
- dVAR;
- const char * const s = PerlEnv_getenv("PERL_RE_COLORS");
- if (s) {
- char *t = savepv(s);
- int i = 0;
- PL_colors[0] = t;
- while (++i < 6) {
- t = strchr(t, '\t');
- if (t) {
- *t = '\0';
- PL_colors[i] = ++t;
- }
- else
- PL_colors[i] = t = (char *)"";
- }
- } else {
- int i = 0;
- while (i < 6)
- PL_colors[i++] = (char *)"";
- }
- PL_colorset = 1;
-}
-#endif
-
-
-#ifdef TRIE_STUDY_OPT
-#define CHECK_RESTUDY_GOTO \
- if ( \
- (data.flags & SCF_TRIE_RESTUDY) \
- && ! restudied++ \
- ) goto reStudy
-#else
-#define CHECK_RESTUDY_GOTO
-#endif
-
-/*
- - pregcomp - compile a regular expression into internal code
- *
- * We can't allocate space until we know how big the compiled form will be,
- * but we can't compile it (and thus know how big it is) until we've got a
- * place to put the code. So we cheat: we compile it twice, once with code
- * generation turned off and size counting turned on, and once "for real".
- * This also means that we don't allocate space until we are sure that the
- * thing really will compile successfully, and we never have to move the
- * code and thus invalidate pointers into it. (Note that it has to be in
- * one piece because free() must be able to free it all.) [NB: not true in perl]
- *
- * Beware that the optimization-preparation code in here knows about some
- * of the structure of the compiled regexp. [I'll say.]
- */
-
-
-
-#ifndef PERL_IN_XSUB_RE
-#define RE_ENGINE_PTR &reh_regexp_engine
-#else
-extern const struct regexp_engine my_reg_engine;
-#define RE_ENGINE_PTR &my_reg_engine
-#endif
-
-#ifndef PERL_IN_XSUB_RE
-REGEXP *
-Perl_pregcomp(pTHX_ SV * const pattern, const U32 flags)
-{
- dVAR;
- HV * const table = GvHV(PL_hintgv);
-
- PERL_ARGS_ASSERT_PREGCOMP;
-
- /* Dispatch a request to compile a regexp to correct
- regexp engine. */
- if (table) {
- SV **ptr= hv_fetchs(table, "regcomp", FALSE);
- GET_RE_DEBUG_FLAGS_DECL;
- if (ptr && SvIOK(*ptr) && SvIV(*ptr)) {
- const regexp_engine *eng=INT2PTR(regexp_engine*,SvIV(*ptr));
- DEBUG_COMPILE_r({
- PerlIO_printf(Perl_debug_log, "Using engine %"UVxf"\n",
- SvIV(*ptr));
- });
- return CALLREGCOMP_ENG(eng, pattern, flags);
- }
- }
- return Perl_re_compile(aTHX_ pattern, flags);
-}
-#endif
-
-REGEXP *
-Perl_re_compile(pTHX_ SV * const pattern, U32 pm_flags)
-{
- dVAR;
- REGEXP *rx;
- struct regexp *r;
- register regexp_internal *ri;
- STRLEN plen;
- char *exp = SvPV(pattern, plen);
- char* xend = exp + plen;
- regnode *scan;
- I32 flags;
- I32 minlen = 0;
- I32 sawplus = 0;
- I32 sawopen = 0;
- scan_data_t data;
- RExC_state_t RExC_state;
- RExC_state_t * const pRExC_state = &RExC_state;
-#ifdef TRIE_STUDY_OPT
- int restudied= 0;
- RExC_state_t copyRExC_state;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_COMPILE;
-
- DEBUG_r(if (!PL_colorset) reginitcolors());
-
- RExC_utf8 = RExC_orig_utf8 = SvUTF8(pattern);
-
- DEBUG_COMPILE_r({
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RExC_utf8,
- dsv, exp, plen, 60);
- PerlIO_printf(Perl_debug_log, "%sCompiling REx%s %s\n",
- PL_colors[4],PL_colors[5],s);
- });
-
-redo_first_pass:
- RExC_precomp = exp;
- RExC_flags = pm_flags;
- RExC_sawback = 0;
-
- RExC_seen = 0;
- RExC_seen_zerolen = *exp == '^' ? -1 : 0;
- RExC_seen_evals = 0;
- RExC_extralen = 0;
-
- /* First pass: determine size, legality. */
- RExC_parse = exp;
- RExC_start = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_nestroot = 0;
- RExC_size = 0L;
- RExC_emit = &PL_regdummy;
- RExC_whilem_seen = 0;
- RExC_charnames = NULL;
- RExC_open_parens = NULL;
- RExC_close_parens = NULL;
- RExC_opend = NULL;
- RExC_paren_names = NULL;
-#ifdef DEBUGGING
- RExC_paren_name_list = NULL;
-#endif
- RExC_recurse = NULL;
- RExC_recurse_count = 0;
-
-#if 0 /* REGC() is (currently) a NOP at the first pass.
- * Clever compilers notice this and complain. --jhi */
- REGC((U8)REG_MAGIC, (char*)RExC_emit);
-#endif
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n"));
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- RExC_precomp = NULL;
- return(NULL);
- }
- if (RExC_utf8 && !RExC_orig_utf8) {
- /* It's possible to write a regexp in ascii that represents Unicode
- codepoints outside of the byte range, such as via \x{100}. If we
- detect such a sequence we have to convert the entire pattern to utf8
- and then recompile, as our sizing calculation will have been based
- on 1 byte == 1 character, but we will need to use utf8 to encode
- at least some part of the pattern, and therefore must convert the whole
- thing.
- XXX: somehow figure out how to make this less expensive...
- -- dmq */
- STRLEN len = plen;
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log,
- "UTF8 mismatch! Converting to utf8 for resizing and compile\n"));
- exp = (char*)Perl_bytes_to_utf8(aTHX_ (U8*)exp, &len);
- xend = exp + len;
- RExC_orig_utf8 = RExC_utf8;
- SAVEFREEPV(exp);
- goto redo_first_pass;
- }
- DEBUG_PARSE_r({
- PerlIO_printf(Perl_debug_log,
- "Required size %"IVdf" nodes\n"
- "Starting second pass (creation)\n",
- (IV)RExC_size);
- RExC_lastnum=0;
- RExC_lastparse=NULL;
- });
- /* Small enough for pointer-storage convention?
- If extralen==0, this means that we will not need long jumps. */
- if (RExC_size >= 0x10000L && RExC_extralen)
- RExC_size += RExC_extralen;
- else
- RExC_extralen = 0;
- if (RExC_whilem_seen > 15)
- RExC_whilem_seen = 15;
-
- /* Allocate space and zero-initialize. Note, the two step process
- of zeroing when in debug mode, thus anything assigned has to
- happen after that */
- rx = (REGEXP*) newSV_type(SVt_REGEXP);
- r = (struct regexp*)SvANY(rx);
- Newxc(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode),
- char, regexp_internal);
- if ( r == NULL || ri == NULL )
- FAIL("Regexp out of space");
-#ifdef DEBUGGING
- /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */
- Zero(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode), char);
-#else
- /* bulk initialize base fields with 0. */
- Zero(ri, sizeof(regexp_internal), char);
-#endif
-
- /* non-zero initialization begins here */
- RXi_SET( r, ri );
- r->engine= RE_ENGINE_PTR;
- r->extflags = pm_flags;
- {
- bool has_p = ((r->extflags & RXf_PMf_KEEPCOPY) == RXf_PMf_KEEPCOPY);
- bool has_minus = ((r->extflags & RXf_PMf_STD_PMMOD) != RXf_PMf_STD_PMMOD);
- bool has_runon = ((RExC_seen & REG_SEEN_RUN_ON_COMMENT)==REG_SEEN_RUN_ON_COMMENT);
- U16 reganch = (U16)((r->extflags & RXf_PMf_STD_PMMOD)
- >> RXf_PMf_STD_PMMOD_SHIFT);
- const char *fptr = STD_PAT_MODS; /*"msix"*/
- char *p;
- const STRLEN wraplen = plen + has_minus + has_p + has_runon
- + (sizeof(STD_PAT_MODS) - 1)
- + (sizeof("(?:)") - 1);
-
- p = sv_grow(MUTABLE_SV(rx), wraplen + 1);
- SvCUR_set(rx, wraplen);
- SvPOK_on(rx);
- SvFLAGS(rx) |= SvUTF8(pattern);
- *p++='('; *p++='?';
- if (has_p)
- *p++ = KEEPCOPY_PAT_MOD; /*'p'*/
- {
- char *r = p + (sizeof(STD_PAT_MODS) - 1) + has_minus - 1;
- char *colon = r + 1;
- char ch;
-
- while((ch = *fptr++)) {
- if(reganch & 1)
- *p++ = ch;
- else
- *r-- = ch;
- reganch >>= 1;
- }
- if(has_minus) {
- *r = '-';
- p = colon;
- }
- }
-
- *p++ = ':';
- Copy(RExC_precomp, p, plen, char);
- assert ((RX_WRAPPED(rx) - p) < 16);
- r->pre_prefix = p - RX_WRAPPED(rx);
- p += plen;
- if (has_runon)
- *p++ = '\n';
- *p++ = ')';
- *p = 0;
- }
-
- r->intflags = 0;
- r->nparens = RExC_npar - 1; /* set early to validate backrefs */
-
- if (RExC_seen & REG_SEEN_RECURSE) {
- Newxz(RExC_open_parens, RExC_npar,regnode *);
- SAVEFREEPV(RExC_open_parens);
- Newxz(RExC_close_parens,RExC_npar,regnode *);
- SAVEFREEPV(RExC_close_parens);
- }
-
- /* Useful during FAIL. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- Newxz(ri->u.offsets, 2*RExC_size+1, U32); /* MJD 20001228 */
- DEBUG_OFFSETS_r(PerlIO_printf(Perl_debug_log,
- "%s %"UVuf" bytes for offset annotations.\n",
- ri->u.offsets ? "Got" : "Couldn't get",
- (UV)((2*RExC_size+1) * sizeof(U32))));
-#endif
- SetProgLen(ri,RExC_size);
- RExC_rx_sv = rx;
- RExC_rx = r;
- RExC_rxi = ri;
- REH_CALL_COMP_BEGIN_HOOK(pRExC_state->rx);
-
- /* Second pass: emit code. */
- RExC_flags = pm_flags; /* don't let top level (?i) bleed */
- RExC_parse = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_emit_start = ri->program;
- RExC_emit = ri->program;
- RExC_emit_bound = ri->program + RExC_size + 1;
-
- /* Store the count of eval-groups for security checks: */
- RExC_rx->seen_evals = RExC_seen_evals;
- REGC((U8)REG_MAGIC, (char*) RExC_emit++);
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- ReREFCNT_dec(rx);
- return(NULL);
- }
- /* XXXX To minimize changes to RE engine we always allocate
- 3-units-long substrs field. */
- Newx(r->substrs, 1, struct reg_substr_data);
- if (RExC_recurse_count) {
- Newxz(RExC_recurse,RExC_recurse_count,regnode *);
- SAVEFREEPV(RExC_recurse);
- }
-
-reStudy:
- r->minlen = minlen = sawplus = sawopen = 0;
- Zero(r->substrs, 1, struct reg_substr_data);
-
-#ifdef TRIE_STUDY_OPT
- if (!restudied) {
- StructCopy(&zero_scan_data, &data, scan_data_t);
- copyRExC_state = RExC_state;
- } else {
- U32 seen=RExC_seen;
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log,"Restudying\n"));
-
- RExC_state = copyRExC_state;
- if (seen & REG_TOP_LEVEL_BRANCHES)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
- else
- RExC_seen &= ~REG_TOP_LEVEL_BRANCHES;
- if (data.last_found) {
- SvREFCNT_dec(data.longest_fixed);
- SvREFCNT_dec(data.longest_float);
- SvREFCNT_dec(data.last_found);
- }
- StructCopy(&zero_scan_data, &data, scan_data_t);
- }
-#else
- StructCopy(&zero_scan_data, &data, scan_data_t);
-#endif
-
- /* Dig out information for optimizations. */
- r->extflags = RExC_flags; /* was pm_op */
- /*dmq: removed as part of de-PMOP: pm->op_pmflags = RExC_flags; */
-
- if (UTF)
- SvUTF8_on(rx); /* Unicode in it? */
- ri->regstclass = NULL;
- if (RExC_naughty >= 10) /* Probably an expensive pattern. */
- r->intflags |= PREGf_NAUGHTY;
- scan = ri->program + 1; /* First BRANCH. */
-
- /* testing for BRANCH here tells us whether there is "must appear"
- data in the pattern. If there is then we can use it for optimisations */
- if (!(RExC_seen & REG_TOP_LEVEL_BRANCHES)) { /* Only one top-level choice. */
- I32 fake;
- STRLEN longest_float_length, longest_fixed_length;
- struct regnode_charclass_class ch_class; /* pointed to by data */
- int stclass_flag;
- I32 last_close = 0; /* pointed to by data */
- regnode *first= scan;
- regnode *first_next= regnext(first);
-
- /*
- * Skip introductions and multiplicators >= 1
- * so that we can extract the 'meat' of the pattern that must
- * match in the large if() sequence following.
- * NOTE that EXACT is NOT covered here, as it is normally
- * picked up by the optimiser separately.
- *
- * This is unfortunate as the optimiser isnt handling lookahead
- * properly currently.
- *
- */
- while ((OP(first) == OPEN && (sawopen = 1)) ||
- /* An OR of *one* alternative - should not happen now. */
- (OP(first) == BRANCH && OP(first_next) != BRANCH) ||
- /* for now we can't handle lookbehind IFMATCH*/
- (OP(first) == IFMATCH && !first->flags) ||
- (OP(first) == PLUS) ||
- (OP(first) == MINMOD) ||
- /* An {n,m} with n>0 */
- (PL_regkind[OP(first)] == CURLY && ARG1(first) > 0) ||
- (OP(first) == NOTHING && PL_regkind[OP(first_next)] != END ))
- {
- /*
- * the only op that could be a regnode is PLUS, all the rest
- * will be regnode_1 or regnode_2.
- *
- */
- if (OP(first) == PLUS)
- sawplus = 1;
- else
- first += regarglen[OP(first)];
-
- first = NEXTOPER(first);
- first_next= regnext(first);
- }
-
- /* Starting-point info. */
- again:
- DEBUG_PEEP("first:",first,0);
- /* Ignore EXACT as we deal with it later. */
- if (PL_regkind[OP(first)] == EXACT) {
- if (OP(first) == EXACT)
- NOOP; /* Empty, get anchored substr later. */
- else if ((OP(first) == EXACTF || OP(first) == EXACTFL))
- ri->regstclass = first;
- }
-#ifdef TRIE_STCLASS
- else if (PL_regkind[OP(first)] == TRIE &&
- ((reg_trie_data *)ri->data->data[ ARG(first) ])->minlen>0)
- {
- regnode *trie_op;
- /* this can happen only on restudy */
- if ( OP(first) == TRIE ) {
- struct regnode_1 *trieop = (struct regnode_1 *)
- PerlMemShared_calloc(1, sizeof(struct regnode_1));
- StructCopy(first,trieop,struct regnode_1);
- trie_op=(regnode *)trieop;
- } else {
- struct regnode_charclass *trieop = (struct regnode_charclass *)
- PerlMemShared_calloc(1, sizeof(struct regnode_charclass));
- StructCopy(first,trieop,struct regnode_charclass);
- trie_op=(regnode *)trieop;
- }
- OP(trie_op)+=2;
- make_trie_failtable(pRExC_state, (regnode *)first, trie_op, 0);
- ri->regstclass = trie_op;
- }
-#endif
- else if (strchr((const char*)PL_simple,OP(first)))
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOUND ||
- PL_regkind[OP(first)] == NBOUND)
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOL) {
- r->extflags |= (OP(first) == MBOL
- ? RXf_ANCH_MBOL
- : (OP(first) == SBOL
- ? RXf_ANCH_SBOL
- : RXf_ANCH_BOL));
- first = NEXTOPER(first);
- goto again;
- }
- else if (OP(first) == GPOS) {
- r->extflags |= RXf_ANCH_GPOS;
- first = NEXTOPER(first);
- goto again;
- }
- else if ((!sawopen || !RExC_sawback) &&
- (OP(first) == STAR &&
- PL_regkind[OP(NEXTOPER(first))] == REG_ANY) &&
- !(r->extflags & RXf_ANCH) && !(RExC_seen & REG_SEEN_EVAL))
- {
- /* turn .* into ^.* with an implied $*=1 */
- const int type =
- (OP(NEXTOPER(first)) == REG_ANY)
- ? RXf_ANCH_MBOL
- : RXf_ANCH_SBOL;
- r->extflags |= type;
- r->intflags |= PREGf_IMPLICIT;
- first = NEXTOPER(first);
- goto again;
- }
- if (sawplus && (!sawopen || !RExC_sawback)
- && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */
- /* x+ must match at the 1st pos of run of x's */
- r->intflags |= PREGf_SKIP;
-
- /* Scan is after the zeroth branch, first is atomic matcher. */
-#ifdef TRIE_STUDY_OPT
- DEBUG_PARSE_r(
- if (!restudied)
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#else
- DEBUG_PARSE_r(
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#endif
-
-
- /*
- * If there's something expensive in the r.e., find the
- * longest literal string that must appear and make it the
- * regmust. Resolve ties in favor of later strings, since
- * the regstart check works with the beginning of the r.e.
- * and avoiding duplication strengthens checking. Not a
- * strong reason, but sufficient in the absence of others.
- * [Now we resolve ties in favor of the earlier string if
- * it happens that c_offset_min has been invalidated, since the
- * earlier string may buy us something the later one won't.]
- */
-
- data.longest_fixed = newSVpvs("");
- data.longest_float = newSVpvs("");
- data.last_found = newSVpvs("");
- data.longest = &(data.longest_fixed);
- first = scan;
- if (!ri->regstclass) {
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- stclass_flag = SCF_DO_STCLASS_AND;
- } else /* XXXX Check for BOUND? */
- stclass_flag = 0;
- data.last_closep = &last_close;
-
- minlen = study_chunk(pRExC_state, &first, &minlen, &fake, scan + RExC_size, /* Up to end */
- &data, -1, NULL, NULL,
- SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag,0);
-
-
- CHECK_RESTUDY_GOTO;
-
-
- if ( RExC_npar == 1 && data.longest == &(data.longest_fixed)
- && data.last_start_min == 0 && data.last_end > 0
- && !RExC_seen_zerolen
- && !(RExC_seen & REG_SEEN_VERBARG)
- && (!(RExC_seen & REG_SEEN_GPOS) || (r->extflags & RXf_ANCH_GPOS)))
- r->extflags |= RXf_CHECK_ALL;
- scan_commit(pRExC_state, &data,&minlen,0);
- SvREFCNT_dec(data.last_found);
-
- /* Note that code very similar to this but for anchored string
- follows immediately below, changes may need to be made to both.
- Be careful.
- */
- longest_float_length = CHR_SVLEN(data.longest_float);
- if (longest_float_length
- || (data.flags & SF_FL_BEFORE_EOL
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */
- && data.offset_fixed == data.offset_float_min
- && SvCUR(data.longest_fixed) == SvCUR(data.longest_float))
- goto remove_float; /* As in (a)+. */
-
- /* copy the information about the longest float from the reg_scan_data
- over to the program. */
- if (SvUTF8(data.longest_float)) {
- r->float_utf8 = data.longest_float;
- r->float_substr = NULL;
- } else {
- r->float_substr = data.longest_float;
- r->float_utf8 = NULL;
- }
- /* float_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_float ? *(data.minlen_float)
- : (I32)longest_float_length;
- r->float_end_shift = ml - data.offset_float_min
- - longest_float_length + (SvTAIL(data.longest_float) != 0)
- + data.lookbehind_float;
- r->float_min_offset = data.offset_float_min - data.lookbehind_float;
- r->float_max_offset = data.offset_float_max;
- if (data.offset_float_max < I32_MAX) /* Don't offset infinity */
- r->float_max_offset -= data.lookbehind_float;
-
- t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_float, t ? FBMcf_TAIL : 0);
- }
- else {
- remove_float:
- r->float_substr = r->float_utf8 = NULL;
- SvREFCNT_dec(data.longest_float);
- longest_float_length = 0;
- }
-
- /* Note that code very similar to this but for floating string
- is immediately above, changes may need to be made to both.
- Be careful.
- */
- longest_fixed_length = CHR_SVLEN(data.longest_fixed);
- if (longest_fixed_length
- || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- /* copy the information about the longest fixed
- from the reg_scan_data over to the program. */
- if (SvUTF8(data.longest_fixed)) {
- r->anchored_utf8 = data.longest_fixed;
- r->anchored_substr = NULL;
- } else {
- r->anchored_substr = data.longest_fixed;
- r->anchored_utf8 = NULL;
- }
- /* fixed_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_fixed ? *(data.minlen_fixed)
- : (I32)longest_fixed_length;
- r->anchored_end_shift = ml - data.offset_fixed
- - longest_fixed_length + (SvTAIL(data.longest_fixed) != 0)
- + data.lookbehind_fixed;
- r->anchored_offset = data.offset_fixed - data.lookbehind_fixed;
-
- t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_fixed, t ? FBMcf_TAIL : 0);
- }
- else {
- r->anchored_substr = r->anchored_utf8 = NULL;
- SvREFCNT_dec(data.longest_fixed);
- longest_fixed_length = 0;
- }
- if (ri->regstclass
- && (OP(ri->regstclass) == REG_ANY || OP(ri->regstclass) == SANY))
- ri->regstclass = NULL;
- if ((!(r->anchored_substr || r->anchored_utf8) || r->anchored_offset)
- && stclass_flag
- && !(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV *sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
-
- /* A temporary algorithm prefers floated substr to fixed one to dig more info. */
- if (longest_fixed_length > longest_float_length) {
- r->check_end_shift = r->anchored_end_shift;
- r->check_substr = r->anchored_substr;
- r->check_utf8 = r->anchored_utf8;
- r->check_offset_min = r->check_offset_max = r->anchored_offset;
- if (r->extflags & RXf_ANCH_SINGLE)
- r->extflags |= RXf_NOSCAN;
- }
- else {
- r->check_end_shift = r->float_end_shift;
- r->check_substr = r->float_substr;
- r->check_utf8 = r->float_utf8;
- r->check_offset_min = r->float_min_offset;
- r->check_offset_max = r->float_max_offset;
- }
- /* XXXX Currently intuiting is not compatible with ANCH_GPOS.
- This should be changed ASAP! */
- if ((r->check_substr || r->check_utf8) && !(r->extflags & RXf_ANCH_GPOS)) {
- r->extflags |= RXf_USE_INTUIT;
- if (SvTAIL(r->check_substr ? r->check_substr : r->check_utf8))
- r->extflags |= RXf_INTUIT_TAIL;
- }
- /* XXX Unneeded? dmq (shouldn't as this is handled elsewhere)
- if ( (STRLEN)minlen < longest_float_length )
- minlen= longest_float_length;
- if ( (STRLEN)minlen < longest_fixed_length )
- minlen= longest_fixed_length;
- */
- }
- else {
- /* Several toplevels. Best we can is to set minlen. */
- I32 fake;
- struct regnode_charclass_class ch_class;
- I32 last_close = 0;
-
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "\nMulti Top Level\n"));
-
- scan = ri->program + 1;
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- data.last_closep = &last_close;
-
-
- minlen = study_chunk(pRExC_state, &scan, &minlen, &fake, scan + RExC_size,
- &data, -1, NULL, NULL, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS,0);
-
- CHECK_RESTUDY_GOTO;
-
- r->check_substr = r->check_utf8 = r->anchored_substr = r->anchored_utf8
- = r->float_substr = r->float_utf8 = NULL;
- if (!(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV* sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
- }
-
- /* Guard against an embedded (?=) or (?<=) with a longer minlen than
- the "real" pattern. */
- DEBUG_OPTIMISE_r({
- PerlIO_printf(Perl_debug_log,"minlen: %"IVdf" r->minlen:%"IVdf"\n",
- (IV)minlen, (IV)r->minlen);
- });
- r->minlenret = minlen;
- if (r->minlen < minlen)
- r->minlen = minlen;
-
- if (RExC_seen & REG_SEEN_GPOS)
- r->extflags |= RXf_GPOS_SEEN;
- if (RExC_seen & REG_SEEN_LOOKBEHIND)
- r->extflags |= RXf_LOOKBEHIND_SEEN;
- if (RExC_seen & REG_SEEN_EVAL)
- r->extflags |= RXf_EVAL_SEEN;
- if (RExC_seen & REG_SEEN_CANY)
- r->extflags |= RXf_CANY_SEEN;
- if (RExC_seen & REG_SEEN_VERBARG)
- r->intflags |= PREGf_VERBARG_SEEN;
- if (RExC_seen & REG_SEEN_CUTGROUP)
- r->intflags |= PREGf_CUTGROUP_SEEN;
- if (RExC_paren_names)
- RXp_PAREN_NAMES(r) = MUTABLE_HV(SvREFCNT_inc(RExC_paren_names));
- else
- RXp_PAREN_NAMES(r) = NULL;
-
-#ifdef STUPID_PATTERN_CHECKS
- if (RX_PRELEN(rx) == 0)
- r->extflags |= RXf_NULL;
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else if (RX_PRELEN(rx) == 3 && memEQ("\\s+", RX_PRECOMP(rx), 3))
- r->extflags |= RXf_WHITE;
- else if (RX_PRELEN(rx) == 1 && RXp_PRECOMP(rx)[0] == '^')
- r->extflags |= RXf_START_ONLY;
-#else
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else {
- regnode *first = ri->program + 1;
- U8 fop = OP(first);
- U8 nop = OP(NEXTOPER(first));
-
- if (PL_regkind[fop] == NOTHING && nop == END)
- r->extflags |= RXf_NULL;
- else if (PL_regkind[fop] == BOL && nop == END)
- r->extflags |= RXf_START_ONLY;
- else if (fop == PLUS && nop ==SPACE && OP(regnext(first))==END)
- r->extflags |= RXf_WHITE;
- }
-#endif
-#ifdef DEBUGGING
- if (RExC_paren_names) {
- ri->name_list_idx = add_data( pRExC_state, 1, "p" );
- ri->data->data[ri->name_list_idx] = (void*)SvREFCNT_inc(RExC_paren_name_list);
- } else
-#endif
- ri->name_list_idx = 0;
-
- if (RExC_recurse_count) {
- for ( ; RExC_recurse_count ; RExC_recurse_count-- ) {
- const regnode *scan = RExC_recurse[RExC_recurse_count-1];
- ARG2L_SET( scan, RExC_open_parens[ARG(scan)-1] - scan );
- }
- }
- Newxz(r->offs, RExC_npar, regexp_paren_pair);
- /* assume we don't need to swap parens around before we match */
-
- DEBUG_DUMP_r({
- PerlIO_printf(Perl_debug_log,"Final program:\n");
- regdump(r);
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_OFFSETS_r(if (ri->u.offsets) {
- const U32 len = ri->u.offsets[0];
- U32 i;
- GET_RE_DEBUG_FLAGS_DECL;
- PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)ri->u.offsets[0]);
- for (i = 1; i <= len; i++) {
- if (ri->u.offsets[i*2-1] || ri->u.offsets[i*2])
- PerlIO_printf(Perl_debug_log, "%"UVuf":%"UVuf"[%"UVuf"] ",
- (UV)i, (UV)ri->u.offsets[i*2-1], (UV)ri->u.offsets[i*2]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
-#endif
- return rx;
-}
-
-#undef RE_ENGINE_PTR
-
-
-SV*
-Perl_reg_named_buff(pTHX_ REGEXP * const rx, SV * const key, SV * const value,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF;
-
- PERL_UNUSED_ARG(value);
-
- if (flags & RXapif_FETCH) {
- return reg_named_buff_fetch(rx, key, flags);
- } else if (flags & (RXapif_STORE | RXapif_DELETE | RXapif_CLEAR)) {
- Perl_croak(aTHX_ "%s", PL_no_modify);
- return NULL;
- } else if (flags & RXapif_EXISTS) {
- return reg_named_buff_exists(rx, key, flags)
- ? &PL_sv_yes
- : &PL_sv_no;
- } else if (flags & RXapif_REGNAMES) {
- return reg_named_buff_all(rx, flags);
- } else if (flags & (RXapif_SCALAR | RXapif_REGNAMES_COUNT)) {
- return reg_named_buff_scalar(rx, flags);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_iter(pTHX_ REGEXP * const rx, const SV * const lastkey,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ITER;
- PERL_UNUSED_ARG(lastkey);
-
- if (flags & RXapif_FIRSTKEY)
- return reg_named_buff_firstkey(rx, flags);
- else if (flags & RXapif_NEXTKEY)
- return reg_named_buff_nextkey(rx, flags);
- else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_iter", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_fetch(pTHX_ REGEXP * const r, SV * const namesv,
- const U32 flags)
-{
- AV *retarray = NULL;
- SV *ret;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FETCH;
-
- if (flags & RXapif_ALL)
- retarray=newAV();
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HE *he_str = hv_fetch_ent( RXp_PAREN_NAMES(rx), namesv, 0, 0 );
- if (he_str) {
- IV i;
- SV* sv_dat=HeVAL(he_str);
- I32 *nums=(I32*)SvPVX(sv_dat);
- for ( i=0; i<SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->nparens) >= nums[i]
- && rx->offs[nums[i]].start != -1
- && rx->offs[nums[i]].end != -1)
- {
- ret = newSVpvs("");
- CALLREG_NUMBUF_FETCH(r,nums[i],ret);
- if (!retarray)
- return ret;
- } else {
- ret = newSVsv(&PL_sv_undef);
- }
- if (retarray)
- av_push(retarray, ret);
- }
- if (retarray)
- return newRV_noinc(MUTABLE_SV(retarray));
- }
- }
- return NULL;
-}
-
-bool
-Perl_reg_named_buff_exists(pTHX_ REGEXP * const r, SV * const key,
- const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_EXISTS;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & RXapif_ALL) {
- return hv_exists_ent(RXp_PAREN_NAMES(rx), key, 0);
- } else {
- SV *sv = CALLREG_NAMED_BUFF_FETCH(r, key, flags);
- if (sv) {
- SvREFCNT_dec(sv);
- return TRUE;
- } else {
- return FALSE;
- }
- }
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_firstkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FIRSTKEY;
-
- if ( rx && RXp_PAREN_NAMES(rx) ) {
- (void)hv_iterinit(RXp_PAREN_NAMES(rx));
-
- return CALLREG_NAMED_BUFF_NEXTKEY(r, NULL, flags & ~RXapif_FIRSTKEY);
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_nextkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_NEXTKEY;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv = RXp_PAREN_NAMES(rx);
- HE *temphe;
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- return newSVhek(HeKEY_hek(temphe));
- }
- }
- }
- return NULL;
-}
-
-SV*
-Perl_reg_named_buff_scalar(pTHX_ REGEXP * const r, const U32 flags)
-{
- SV *ret;
- AV *av;
- I32 length;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_SCALAR;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & (RXapif_ALL | RXapif_REGNAMES_COUNT)) {
- return newSViv(HvTOTALKEYS(RXp_PAREN_NAMES(rx)));
- } else if (flags & RXapif_ONE) {
- ret = CALLREG_NAMED_BUFF_ALL(r, (flags | RXapif_REGNAMES));
- av = MUTABLE_AV(SvRV(ret));
- length = av_len(av);
- SvREFCNT_dec(ret);
- return newSViv(length + 1);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_scalar", (int)flags);
- return NULL;
- }
- }
- return &PL_sv_undef;
-}
-
-SV*
-Perl_reg_named_buff_all(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- AV *av = newAV();
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ALL;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv= RXp_PAREN_NAMES(rx);
- HE *temphe;
- (void)hv_iterinit(hv);
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- av_push(av, newSVhek(HeKEY_hek(temphe)));
- }
- }
- }
-
- return newRV_noinc(MUTABLE_SV(av));
-}
-
-void
-Perl_reg_numbered_buff_fetch(pTHX_ REGEXP * const r, const I32 paren,
- SV * const sv)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- char *s = NULL;
- I32 i = 0;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_FETCH;
-
- if (!rx->subbeg) {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- else
- if (paren == RX_BUFF_IDX_PREMATCH && rx->offs[0].start != -1) {
- /* $` */
- i = rx->offs[0].start;
- s = rx->subbeg;
- }
- else
- if (paren == RX_BUFF_IDX_POSTMATCH && rx->offs[0].end != -1) {
- /* $' */
- s = rx->subbeg + rx->offs[0].end;
- i = rx->sublen - rx->offs[0].end;
- }
- else
- if ( 0 <= paren && paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- /* $& $1 ... */
- i = t1 - s1;
- s = rx->subbeg + s1;
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- assert(rx->sublen >= (s - rx->subbeg) + i );
- if (i >= 0) {
- const int oldtainted = PL_tainted;
- TAINT_NOT;
- sv_setpvn(sv, s, i);
- PL_tainted = oldtainted;
- if ( (rx->extflags & RXf_CANY_SEEN)
- ? (RXp_MATCH_UTF8(rx)
- && (!i || is_utf8_string((U8*)s, i)))
- : (RXp_MATCH_UTF8(rx)) )
- {
- SvUTF8_on(sv);
- }
- else
- SvUTF8_off(sv);
- if (PL_tainting) {
- if (RXp_MATCH_TAINTED(rx)) {
- if (SvTYPE(sv) >= SVt_PVMG) {
- MAGIC* const mg = SvMAGIC(sv);
- MAGIC* mgt;
- PL_tainted = 1;
- SvMAGIC_set(sv, mg->mg_moremagic);
- SvTAINT(sv);
- if ((mgt = SvMAGIC(sv))) {
- mg->mg_moremagic = mgt;
- SvMAGIC_set(sv, mg);
- }
- } else {
- PL_tainted = 1;
- SvTAINT(sv);
- }
- } else
- SvTAINTED_off(sv);
- }
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
-}
-
-void
-Perl_reg_numbered_buff_store(pTHX_ REGEXP * const rx, const I32 paren,
- SV const * const value)
-{
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_STORE;
-
- PERL_UNUSED_ARG(rx);
- PERL_UNUSED_ARG(paren);
- PERL_UNUSED_ARG(value);
-
- if (!PL_localizing)
- Perl_croak(aTHX_ "%s", PL_no_modify);
-}
-
-I32
-Perl_reg_numbered_buff_length(pTHX_ REGEXP * const r, const SV * const sv,
- const I32 paren)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- I32 i;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_LENGTH;
-
- /* Some of this code was originally in C<Perl_magic_len> in F<mg.c> */
- switch (paren) {
- /* $` / ${^PREMATCH} */
- case RX_BUFF_IDX_PREMATCH:
- if (rx->offs[0].start != -1) {
- i = rx->offs[0].start;
- if (i > 0) {
- s1 = 0;
- t1 = i;
- goto getlen;
- }
- }
- return 0;
- /* $' / ${^POSTMATCH} */
- case RX_BUFF_IDX_POSTMATCH:
- if (rx->offs[0].end != -1) {
- i = rx->sublen - rx->offs[0].end;
- if (i > 0) {
- s1 = rx->offs[0].end;
- t1 = rx->sublen;
- goto getlen;
- }
- }
- return 0;
- /* $& / ${^MATCH}, $1, $2, ... */
- default:
- if (paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- i = t1 - s1;
- goto getlen;
- } else {
- if (ckWARN(WARN_UNINITIALIZED))
- report_uninit((const SV *)sv);
- return 0;
- }
- }
- getlen:
- if (i > 0 && RXp_MATCH_UTF8(rx)) {
- const char * const s = rx->subbeg + s1;
- const U8 *ep;
- STRLEN el;
-
- i = t1 - s1;
- if (is_utf8_string_loclen((U8*)s, i, &ep, &el))
- i = el;
- }
- return i;
-}
-
-SV*
-Perl_reg_qr_package(pTHX_ REGEXP * const rx)
-{
- PERL_ARGS_ASSERT_REG_QR_PACKAGE;
- PERL_UNUSED_ARG(rx);
- if (0)
- return NULL;
- else
- return newSVpvs("Regexp");
-}
-
-/* Scans the name of a named buffer from the pattern.
- * If flags is REG_RSN_RETURN_NULL returns null.
- * If flags is REG_RSN_RETURN_NAME returns an SV* containing the name
- * If flags is REG_RSN_RETURN_DATA returns the data SV* corresponding
- * to the parsed name as looked up in the RExC_paren_names hash.
- * If there is an error throws a vFAIL().. type exception.
- */
-
-#define REG_RSN_RETURN_NULL 0
-#define REG_RSN_RETURN_NAME 1
-#define REG_RSN_RETURN_DATA 2
-
-STATIC SV*
-S_reg_scan_name(pTHX_ RExC_state_t *pRExC_state, U32 flags)
-{
- char *name_start = RExC_parse;
-
- PERL_ARGS_ASSERT_REG_SCAN_NAME;
-
- if (isIDFIRST_lazy_if(RExC_parse, UTF)) {
- /* skip IDFIRST by using do...while */
- if (UTF)
- do {
- RExC_parse += UTF8SKIP(RExC_parse);
- } while (isALNUM_utf8((U8*)RExC_parse));
- else
- do {
- RExC_parse++;
- } while (isALNUM(*RExC_parse));
- }
-
- if ( flags ) {
- SV* sv_name
- = newSVpvn_flags(name_start, (int)(RExC_parse - name_start),
- SVs_TEMP | (UTF ? SVf_UTF8 : 0));
- if ( flags == REG_RSN_RETURN_NAME)
- return sv_name;
- else if (flags==REG_RSN_RETURN_DATA) {
- HE *he_str = NULL;
- SV *sv_dat = NULL;
- if ( ! sv_name ) /* should not happen*/
- Perl_croak(aTHX_ "panic: no svname in reg_scan_name");
- if (RExC_paren_names)
- he_str = hv_fetch_ent( RExC_paren_names, sv_name, 0, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat )
- vFAIL("Reference to nonexistent named group");
- return sv_dat;
- }
- else {
- Perl_croak(aTHX_ "panic: bad flag in reg_scan_name");
- }
- /* NOT REACHED */
- }
- return NULL;
-}
-
-#define DEBUG_PARSE_MSG(funcname) DEBUG_PARSE_r({ \
- int rem=(int)(RExC_end - RExC_parse); \
- int cut; \
- int num; \
- int iscut=0; \
- if (rem>10) { \
- rem=10; \
- iscut=1; \
- } \
- cut=10-rem; \
- if (RExC_lastparse!=RExC_parse) \
- PerlIO_printf(Perl_debug_log," >%.*s%-*s", \
- rem, RExC_parse, \
- cut + 4, \
- iscut ? "..." : "<" \
- ); \
- else \
- PerlIO_printf(Perl_debug_log,"%16s",""); \
- \
- if (SIZE_ONLY) \
- num = RExC_size + 1; \
- else \
- num=REG_NODE_NUM(RExC_emit); \
- if (RExC_lastnum!=num) \
- PerlIO_printf(Perl_debug_log,"|%4d",num); \
- else \
- PerlIO_printf(Perl_debug_log,"|%4s",""); \
- PerlIO_printf(Perl_debug_log,"|%*s%-4s", \
- (int)((depth*2)), "", \
- (funcname) \
- ); \
- RExC_lastnum=num; \
- RExC_lastparse=RExC_parse; \
-})
-
-
-
-#define DEBUG_PARSE(funcname) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,"%4s","\n"); \
-})
-#define DEBUG_PARSE_FMT(funcname,fmt,args) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,fmt "\n",args); \
-})
-/*
- - reg - regular expression, i.e. main body or parenthesized thing
- *
- * Caller must absorb opening parenthesis.
- *
- * Combining parenthesis handling with the base level of regular expression
- * is a trifle forced, but the need to tie the tails of the branches to what
- * follows makes it hard to avoid.
- */
-#define REGTAIL(x,y,z) regtail((x),(y),(z),depth+1)
-#ifdef DEBUGGING
-#define REGTAIL_STUDY(x,y,z) regtail_study((x),(y),(z),depth+1)
-#else
-#define REGTAIL_STUDY(x,y,z) regtail((x),(y),(z),depth+1)
-#endif
-
-STATIC regnode *
-S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth)
- /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */
-{
- dVAR;
- register regnode *ret; /* Will be the head of the group. */
- register regnode *br;
- register regnode *lastbr;
- register regnode *ender = NULL;
- register I32 parno = 0;
- I32 flags;
- U32 oregflags = RExC_flags;
- bool have_branch = 0;
- bool is_open = 0;
- I32 freeze_paren = 0;
- I32 after_freeze = 0;
-
- /* for (?g), (?gc), and (?o) warnings; warning
- about (?c) will warn about (?g) -- japhy */
-
-#define WASTED_O 0x01
-#define WASTED_G 0x02
-#define WASTED_C 0x04
-#define WASTED_GC (0x02|0x04)
- I32 wastedflags = 0x00;
-
- char * parse_start = RExC_parse; /* MJD */
- char * const oregcomp_parse = RExC_parse;
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG;
- DEBUG_PARSE("reg ");
-
- *flagp = 0; /* Tentatively. */
-
-
- /* Make an OPEN node, if parenthesized. */
- if (paren) {
- if ( *RExC_parse == '*') { /* (*VERB:ARG) */
- char *start_verb = RExC_parse;
- STRLEN verb_len = 0;
- char *start_arg = NULL;
- unsigned char op = 0;
- int argok = 1;
- int internal_argval = 0; /* internal_argval is only useful if !argok */
- while ( *RExC_parse && *RExC_parse != ')' ) {
- if ( *RExC_parse == ':' ) {
- start_arg = RExC_parse + 1;
- break;
- }
- RExC_parse++;
- }
- ++start_verb;
- verb_len = RExC_parse - start_verb;
- if ( start_arg ) {
- RExC_parse++;
- while ( *RExC_parse && *RExC_parse != ')' )
- RExC_parse++;
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern argument");
- if ( RExC_parse == start_arg )
- start_arg = NULL;
- } else {
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern");
- }
-
- switch ( *start_verb ) {
- case 'A': /* (*ACCEPT) */
- if ( memEQs(start_verb,verb_len,"ACCEPT") ) {
- op = ACCEPT;
- internal_argval = RExC_nestroot;
- }
- break;
- case 'C': /* (*COMMIT) */
- if ( memEQs(start_verb,verb_len,"COMMIT") )
- op = COMMIT;
- break;
- case 'F': /* (*FAIL) */
- if ( verb_len==1 || memEQs(start_verb,verb_len,"FAIL") ) {
- op = OPFAIL;
- argok = 0;
- }
- break;
- case ':': /* (*:NAME) */
- case 'M': /* (*MARK:NAME) */
- if ( verb_len==0 || memEQs(start_verb,verb_len,"MARK") ) {
- op = MARKPOINT;
- argok = -1;
- }
- break;
- case 'P': /* (*PRUNE) */
- if ( memEQs(start_verb,verb_len,"PRUNE") )
- op = PRUNE;
- break;
- case 'S': /* (*SKIP) */
- if ( memEQs(start_verb,verb_len,"SKIP") )
- op = SKIP;
- break;
- case 'T': /* (*THEN) */
- /* [19:06] <TimToady> :: is then */
- if ( memEQs(start_verb,verb_len,"THEN") ) {
- op = CUTGROUP;
- RExC_seen |= REG_SEEN_CUTGROUP;
- }
- break;
- }
- if ( ! op ) {
- RExC_parse++;
- vFAIL3("Unknown verb pattern '%.*s'",
- verb_len, start_verb);
- }
- if ( argok ) {
- if ( start_arg && internal_argval ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else if ( argok < 0 && !start_arg ) {
- vFAIL3("Verb pattern '%.*s' has a mandatory argument",
- verb_len, start_verb);
- } else {
- ret = reganode(pRExC_state, op, internal_argval);
- if ( ! internal_argval && ! SIZE_ONLY ) {
- if (start_arg) {
- SV *sv = newSVpvn( start_arg, RExC_parse - start_arg);
- ARG(ret) = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[ARG(ret)]=(void*)sv;
- ret->flags = 0;
- } else {
- ret->flags = 1;
- }
- }
- }
- if (!internal_argval)
- RExC_seen |= REG_SEEN_VERBARG;
- } else if ( start_arg ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else {
- ret = reg_node(pRExC_state, op);
- }
- nextchar(pRExC_state);
- return ret;
- } else
- if (*RExC_parse == '?') { /* (?...) */
- bool is_logical = 0;
- const char * const seqstart = RExC_parse;
-
- RExC_parse++;
- paren = *RExC_parse++;
- ret = NULL; /* For look-ahead/behind. */
- switch (paren) {
-
- case 'P': /* (?P...) variants for those used to PCRE/Python */
- paren = *RExC_parse++;
- if ( paren == '<') /* (?P<...>) named capture */
- goto named_capture;
- else if (paren == '>') { /* (?P>name) named recursion */
- goto named_recursion;
- }
- else if (paren == '=') { /* (?P=...) named backref */
- /* this pretty much dupes the code for \k<NAME> in regatom(), if
- you change this make sure you change that */
- char* name_start = RExC_parse;
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ')')
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
-
- nextchar(pRExC_state);
- return ret;
- }
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- case '<': /* (?<...) */
- if (*RExC_parse == '!')
- paren = ',';
- else if (*RExC_parse != '=')
- named_capture:
- { /* (?<...>) */
- char *name_start;
- SV *svname;
- paren= '>';
- case '\'': /* (?'...') */
- name_start= RExC_parse;
- svname = reg_scan_name(pRExC_state,
- SIZE_ONLY ? /* reverse test from the others */
- REG_RSN_RETURN_NAME :
- REG_RSN_RETURN_NULL);
- if (RExC_parse == name_start) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- if (*RExC_parse != paren)
- vFAIL2("Sequence (?%c... not terminated",
- paren=='>' ? '<' : paren);
- if (SIZE_ONLY) {
- HE *he_str;
- SV *sv_dat = NULL;
- if (!svname) /* shouldnt happen */
- Perl_croak(aTHX_
- "panic: reg_scan_name returned NULL");
- if (!RExC_paren_names) {
- RExC_paren_names= newHV();
- sv_2mortal(MUTABLE_SV(RExC_paren_names));
-#ifdef DEBUGGING
- RExC_paren_name_list= newAV();
- sv_2mortal(MUTABLE_SV(RExC_paren_name_list));
-#endif
- }
- he_str = hv_fetch_ent( RExC_paren_names, svname, 1, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat ) {
- /* croak baby croak */
- Perl_croak(aTHX_
- "panic: paren_name hash element allocation failed");
- } else if ( SvPOK(sv_dat) ) {
- /* (?|...) can mean we have dupes so scan to check
- its already been stored. Maybe a flag indicating
- we are inside such a construct would be useful,
- but the arrays are likely to be quite small, so
- for now we punt -- dmq */
- IV count = SvIV(sv_dat);
- I32 *pv = (I32*)SvPVX(sv_dat);
- IV i;
- for ( i = 0 ; i < count ; i++ ) {
- if ( pv[i] == RExC_npar ) {
- count = 0;
- break;
- }
- }
- if ( count ) {
- pv = (I32*)SvGROW(sv_dat, SvCUR(sv_dat) + sizeof(I32)+1);
- SvCUR_set(sv_dat, SvCUR(sv_dat) + sizeof(I32));
- pv[count] = RExC_npar;
- SvIV_set(sv_dat, SvIVX(sv_dat) + 1);
- }
- } else {
- (void)SvUPGRADE(sv_dat,SVt_PVNV);
- sv_setpvn(sv_dat, (char *)&(RExC_npar), sizeof(I32));
- SvIOK_on(sv_dat);
- SvIV_set(sv_dat, 1);
- }
-#ifdef DEBUGGING
- if (!av_store(RExC_paren_name_list, RExC_npar, SvREFCNT_inc(svname)))
- SvREFCNT_dec(svname);
-#endif
-
- /*sv_dump(sv_dat);*/
- }
- nextchar(pRExC_state);
- paren = 1;
- goto capturing_parens;
- }
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- RExC_parse++;
- case '=': /* (?=...) */
- RExC_seen_zerolen++;
- break;
- case '!': /* (?!...) */
- RExC_seen_zerolen++;
- if (*RExC_parse == ')') {
- ret=reg_node(pRExC_state, OPFAIL);
- nextchar(pRExC_state);
- return ret;
- }
- break;
- case '|': /* (?|...) */
- /* branch reset, behave like a (?:...) except that
- buffers in alternations share the same numbers */
- paren = ':';
- after_freeze = freeze_paren = RExC_npar;
- break;
- case ':': /* (?:...) */
- case '>': /* (?>...) */
- break;
- case '$': /* (?$...) */
- case '@': /* (?@...) */
- vFAIL2("Sequence (?%c...) not implemented", (int)paren);
- break;
- case '#': /* (?#...) */
- while (*RExC_parse && *RExC_parse != ')')
- RExC_parse++;
- if (*RExC_parse != ')')
- FAIL("Sequence (?#... not terminated");
- nextchar(pRExC_state);
- *flagp = TRYAGAIN;
- return NULL;
- case '0' : /* (?0) */
- case 'R' : /* (?R) */
- if (*RExC_parse != ')')
- FAIL("Sequence (?R) not terminated");
- ret = reg_node(pRExC_state, GOSTART);
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- /*notreached*/
- { /* named and numeric backreferences */
- I32 num;
- case '&': /* (?&NAME) */
- parse_start = RExC_parse - 1;
- named_recursion:
- {
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- num = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- goto gen_recurse_regop;
- /* NOT REACHED */
- case '+':
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse++;
- vFAIL("Illegal pattern");
- }
- goto parse_recursion;
- /* NOT REACHED*/
- case '-': /* (?-1) */
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse--; /* rewind to let it be handled later */
- goto parse_flags;
- }
- /*FALLTHROUGH */
- case '1': case '2': case '3': case '4': /* (?1) */
- case '5': case '6': case '7': case '8': case '9':
- RExC_parse--;
- parse_recursion:
- num = atoi(RExC_parse);
- parse_start = RExC_parse - 1; /* MJD */
- if (*RExC_parse == '-')
- RExC_parse++;
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (*RExC_parse!=')')
- vFAIL("Expecting close bracket");
-
- gen_recurse_regop:
- if ( paren == '-' ) {
- /*
- Diagram of capture buffer numbering.
- Top line is the normal capture buffer numbers
- Botton line is the negative indexing as from
- the X (the (?-2))
-
- + 1 2 3 4 5 X 6 7
- /(a(x)y)(a(b(c(?-2)d)e)f)(g(h))/
- - 5 4 3 2 1 X x x
-
- */
- num = RExC_npar + num;
- if (num < 1) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- } else if ( paren == '+' ) {
- num = RExC_npar + num - 1;
- }
-
- ret = reganode(pRExC_state, GOSUB, num);
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- ARG2L_SET( ret, RExC_recurse_count++);
- RExC_emit++;
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Recurse #%"UVuf" to %"IVdf"\n", (UV)ARG(ret), (IV)ARG2L(ret)));
- } else {
- RExC_size++;
- }
- RExC_seen |= REG_SEEN_RECURSE;
- Set_Node_Length(ret, 1 + regarglen[OP(ret)]); /* MJD */
- Set_Node_Offset(ret, parse_start); /* MJD */
-
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- } /* named and numeric backreferences */
- /* NOT REACHED */
-
- case '?': /* (??...) */
- is_logical = 1;
- if (*RExC_parse != '{') {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- *flagp |= POSTPONED;
- paren = *RExC_parse++;
- /* FALL THROUGH */
- case '{': /* (?{...}) */
- {
- I32 count = 1;
- U32 n = 0;
- char c;
- char *s = RExC_parse;
-
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_EVAL;
- while (count && (c = *RExC_parse)) {
- if (c == '\\') {
- if (RExC_parse[1])
- RExC_parse++;
- }
- else if (c == '{')
- count++;
- else if (c == '}')
- count--;
- RExC_parse++;
- }
- if (*RExC_parse != ')') {
- RExC_parse = s;
- vFAIL("Sequence (?{...}) not terminated or not {}-balanced");
- }
- if (!SIZE_ONLY) {
- PAD *pad;
- OP_4tree *sop, *rop;
- SV * const sv = newSVpvn(s, RExC_parse - 1 - s);
-
- ENTER;
- Perl_save_re_context(aTHX);
- rop = sv_compile_2op(sv, &sop, "re", &pad);
- sop->op_private |= OPpREFCOUNTED;
- /* re_dup will OpREFCNT_inc */
- OpREFCNT_set(sop, 1);
- LEAVE;
-
- n = add_data(pRExC_state, 3, "nop");
- RExC_rxi->data->data[n] = (void*)rop;
- RExC_rxi->data->data[n+1] = (void*)sop;
- RExC_rxi->data->data[n+2] = (void*)pad;
- SvREFCNT_dec(sv);
- }
- else { /* First pass */
- if (PL_reginterp_cnt < ++RExC_seen_evals
- && IN_PERL_RUNTIME)
- /* No compiled RE interpolated, has runtime
- components ===> unsafe. */
- FAIL("Eval-group not allowed at runtime, use re 'eval'");
- if (PL_tainting && PL_tainted)
- FAIL("Eval-group in insecure regular expression");
-#if PERL_VERSION > 8
- if (IN_PERL_COMPILETIME)
- PL_cv_has_eval = 1;
-#endif
- }
-
- nextchar(pRExC_state);
- if (is_logical) {
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 2;
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, EVAL, n));
- /* deal with the length of this later - MJD */
- return ret;
- }
- ret = reganode(pRExC_state, EVAL, n);
- Set_Node_Length(ret, RExC_parse - parse_start + 1);
- Set_Node_Offset(ret, parse_start);
- return ret;
- }
- case '(': /* (?(?{...})...) and (?(?=...)...) */
- {
- int is_define= 0;
- if (RExC_parse[0] == '?') { /* (?(?...)) */
- if (RExC_parse[1] == '=' || RExC_parse[1] == '!'
- || RExC_parse[1] == '<'
- || RExC_parse[1] == '{') { /* Lookahead or eval. */
- I32 flag;
-
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 1;
- REGTAIL(pRExC_state, ret, reg(pRExC_state, 1, &flag,depth+1));
- goto insert_if;
- }
- }
- else if ( RExC_parse[0] == '<' /* (?(<NAME>)...) */
- || RExC_parse[0] == '\'' ) /* (?('NAME')...) */
- {
- char ch = RExC_parse[0] == '<' ? '>' : '\'';
- char *name_start= RExC_parse++;
- U32 num = 0;
- SV *sv_dat=reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence (?(%c... not terminated",
- (ch == '>' ? '<' : ch));
- RExC_parse++;
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- ret = reganode(pRExC_state,NGROUPP,num);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'D' &&
- RExC_parse[1] == 'E' &&
- RExC_parse[2] == 'F' &&
- RExC_parse[3] == 'I' &&
- RExC_parse[4] == 'N' &&
- RExC_parse[5] == 'E')
- {
- ret = reganode(pRExC_state,DEFINEP,0);
- RExC_parse +=6 ;
- is_define = 1;
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'R') {
- RExC_parse++;
- parno = 0;
- if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- parno = atoi(RExC_parse++);
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- } else if (RExC_parse[0] == '&') {
- SV *sv_dat;
- RExC_parse++;
- sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- parno = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- ret = reganode(pRExC_state,INSUBP,parno);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- /* (?(1)...) */
- char c;
- parno = atoi(RExC_parse++);
-
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- ret = reganode(pRExC_state, GROUPP, parno);
-
- insert_if_check_paren:
- if ((c = *nextchar(pRExC_state)) != ')')
- vFAIL("Switch condition not recognized");
- insert_if:
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0));
- br = regbranch(pRExC_state, &flags, 1,depth+1);
- if (br == NULL)
- br = reganode(pRExC_state, LONGJMP, 0);
- else
- REGTAIL(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0));
- c = *nextchar(pRExC_state);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- if (c == '|') {
- if (is_define)
- vFAIL("(?(DEFINE)....) does not allow branches");
- lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */
- regbranch(pRExC_state, &flags, 1,depth+1);
- REGTAIL(pRExC_state, ret, lastbr);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- c = *nextchar(pRExC_state);
- }
- else
- lastbr = NULL;
- if (c != ')')
- vFAIL("Switch (?(condition)... contains too many branches");
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, br, ender);
- if (lastbr) {
- REGTAIL(pRExC_state, lastbr, ender);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender);
- }
- else
- REGTAIL(pRExC_state, ret, ender);
- RExC_size++; /* XXX WHY do we need this?!!
- For large programs it seems to be required
- but I can't figure out why. -- dmq*/
- return ret;
- }
- else {
- vFAIL2("Unknown switch condition (?(%.2s", RExC_parse);
- }
- }
- case 0:
- RExC_parse--; /* for vFAIL to print correctly */
- vFAIL("Sequence (? incomplete");
- break;
- default:
- --RExC_parse;
- parse_flags: /* (?i) */
- {
- U32 posflags = 0, negflags = 0;
- U32 *flagsp = &posflags;
-
- while (*RExC_parse) {
- /* && strchr("iogcmsx", *RExC_parse) */
- /* (?g), (?gc) and (?o) are useless here
- and must be globally applied -- japhy */
- switch (*RExC_parse) {
- CASE_STD_PMMOD_FLAGS_PARSE_SET(flagsp);
- case ONCE_PAT_MOD: /* 'o' */
- case GLOBAL_PAT_MOD: /* 'g' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- const I32 wflagbit = *RExC_parse == 'o' ? WASTED_O : WASTED_G;
- if (! (wastedflags & wflagbit) ) {
- wastedflags |= wflagbit;
- vWARN5(
- RExC_parse + 1,
- "Useless (%s%c) - %suse /%c modifier",
- flagsp == &negflags ? "?-" : "?",
- *RExC_parse,
- flagsp == &negflags ? "don't " : "",
- *RExC_parse
- );
- }
- }
- break;
-
- case CONTINUE_PAT_MOD: /* 'c' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- if (! (wastedflags & WASTED_C) ) {
- wastedflags |= WASTED_GC;
- vWARN3(
- RExC_parse + 1,
- "Useless (%sc) - %suse /gc modifier",
- flagsp == &negflags ? "?-" : "?",
- flagsp == &negflags ? "don't " : ""
- );
- }
- }
- break;
- case KEEPCOPY_PAT_MOD: /* 'p' */
- if (flagsp == &negflags) {
- if (SIZE_ONLY && ckWARN(WARN_REGEXP))
- vWARN(RExC_parse + 1,"Useless use of (?-p)");
- } else {
- *flagsp |= RXf_PMf_KEEPCOPY;
- }
- break;
- case '-':
- if (flagsp == &negflags) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- flagsp = &negflags;
- wastedflags = 0; /* reset so (?g-c) warns twice */
- break;
- case ':':
- paren = ':';
- /*FALLTHROUGH*/
- case ')':
- RExC_flags |= posflags;
- RExC_flags &= ~negflags;
- if (paren != ':') {
- oregflags |= posflags;
- oregflags &= ~negflags;
- }
- nextchar(pRExC_state);
- if (paren != ':') {
- *flagp = TRYAGAIN;
- return NULL;
- } else {
- ret = NULL;
- goto parse_rest;
- }
- /*NOTREACHED*/
- default:
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- ++RExC_parse;
- }
- }} /* one for the default block, one for the switch */
- }
- else { /* (...) */
- capturing_parens:
- parno = RExC_npar;
- RExC_npar++;
-
- ret = reganode(pRExC_state, OPEN, parno);
- if (!SIZE_ONLY ){
- if (!RExC_nestroot)
- RExC_nestroot = parno;
- if (RExC_seen & REG_SEEN_RECURSE
- && !RExC_open_parens[parno-1])
- {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting open paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ret)));
- RExC_open_parens[parno-1]= ret;
- }
- }
- Set_Node_Length(ret, 1); /* MJD */
- Set_Node_Offset(ret, RExC_parse); /* MJD */
- is_open = 1;
- }
- }
- else /* ! paren */
- ret = NULL;
-
- parse_rest:
- /* Pick up the branches, linking them together. */
- parse_start = RExC_parse; /* MJD */
- br = regbranch(pRExC_state, &flags, 1,depth+1);
-
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
-
- /* branch_len = (paren != 0); */
-
- if (br == NULL)
- return(NULL);
- if (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, BRANCHJ, br, depth+1);
- }
- else { /* MJD */
- reginsert(pRExC_state, BRANCH, br, depth+1);
- Set_Node_Length(br, paren != 0);
- Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start);
- }
- have_branch = 1;
- if (SIZE_ONLY)
- RExC_extralen += 1; /* For BRANCHJ-BRANCH. */
- }
- else if (paren == ':') {
- *flagp |= flags&SIMPLE;
- }
- if (is_open) { /* Starts with OPEN. */
- REGTAIL(pRExC_state, ret, br); /* OPEN -> first. */
- }
- else if (paren != '?') /* Not Conditional */
- ret = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- lastbr = br;
- while (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- ender = reganode(pRExC_state, LONGJMP,0);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */
- }
- if (SIZE_ONLY)
- RExC_extralen += 2; /* Account for LONGJMP. */
- nextchar(pRExC_state);
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
- br = regbranch(pRExC_state, &flags, 0, depth+1);
-
- if (br == NULL)
- return(NULL);
- REGTAIL(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */
- lastbr = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- }
-
- if (have_branch || paren != ':') {
- /* Make a closing node, and hook it on the end. */
- switch (paren) {
- case ':':
- ender = reg_node(pRExC_state, TAIL);
- break;
- case 1:
- ender = reganode(pRExC_state, CLOSE, parno);
- if (!SIZE_ONLY && RExC_seen & REG_SEEN_RECURSE) {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting close paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ender)));
- RExC_close_parens[parno-1]= ender;
- if (RExC_nestroot == parno)
- RExC_nestroot = 0;
- }
- Set_Node_Offset(ender,RExC_parse+1); /* MJD */
- Set_Node_Length(ender,1); /* MJD */
- break;
- case '<':
- case ',':
- case '=':
- case '!':
- *flagp &= ~HASWIDTH;
- /* FALL THROUGH */
- case '>':
- ender = reg_node(pRExC_state, SUCCEED);
- break;
- case 0:
- ender = reg_node(pRExC_state, END);
- if (!SIZE_ONLY) {
- assert(!RExC_opend); /* there can only be one! */
- RExC_opend = ender;
- }
- break;
- }
- REGTAIL(pRExC_state, lastbr, ender);
-
- if (have_branch && !SIZE_ONLY) {
- if (depth==1)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
-
- /* Hook the tails of the branches to the closing node. */
- for (br = ret; br; br = regnext(br)) {
- const U8 op = PL_regkind[OP(br)];
- if (op == BRANCH) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(br), ender);
- }
- else if (op == BRANCHJ) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(NEXTOPER(br)), ender);
- }
- }
- }
- }
-
- {
- const char *p;
- static const char parens[] = "=!<,>";
-
- if (paren && (p = strchr(parens, paren))) {
- U8 node = ((p - parens) % 2) ? UNLESSM : IFMATCH;
- int flag = (p - parens) > 1;
-
- if (paren == '>')
- node = SUSPEND, flag = 0;
- reginsert(pRExC_state, node,ret, depth+1);
- Set_Node_Cur_Length(ret);
- Set_Node_Offset(ret, parse_start + 1);
- ret->flags = flag;
- REGTAIL_STUDY(pRExC_state, ret, reg_node(pRExC_state, TAIL));
- }
- }
-
- /* Check for proper termination. */
- if (paren) {
- RExC_flags = oregflags;
- if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched (");
- }
- }
- else if (!paren && RExC_parse < RExC_end) {
- if (*RExC_parse == ')') {
- RExC_parse++;
- vFAIL("Unmatched )");
- }
- else
- FAIL("Junk on end of regexp"); /* "Can't happen". */
- /* NOTREACHED */
- }
- if (after_freeze)
- RExC_npar = after_freeze;
- return(ret);
-}
-
-/*
- - regbranch - one alternative of an | operator
- *
- * Implements the concatenation operator.
- */
-STATIC regnode *
-S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register regnode *chain = NULL;
- register regnode *latest;
- I32 flags = 0, c = 0;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGBRANCH;
-
- DEBUG_PARSE("brnc");
-
- if (first)
- ret = NULL;
- else {
- if (!SIZE_ONLY && RExC_extralen)
- ret = reganode(pRExC_state, BRANCHJ,0);
- else {
- ret = reg_node(pRExC_state, BRANCH);
- Set_Node_Length(ret, 1);
- }
- }
-
- if (!first && SIZE_ONLY)
- RExC_extralen += 1; /* BRANCHJ */
-
- *flagp = WORST; /* Tentatively. */
-
- RExC_parse--;
- nextchar(pRExC_state);
- while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') {
- flags &= ~TRYAGAIN;
- latest = regpiece(pRExC_state, &flags,depth+1);
- if (latest == NULL) {
- if (flags & TRYAGAIN)
- continue;
- return(NULL);
- }
- else if (ret == NULL)
- ret = latest;
- *flagp |= flags&(HASWIDTH|POSTPONED);
- if (chain == NULL) /* First piece. */
- *flagp |= flags&SPSTART;
- else {
- RExC_naughty++;
- REGTAIL(pRExC_state, chain, latest);
- }
- chain = latest;
- c++;
- }
- if (chain == NULL) { /* Loop ran zero times. */
- chain = reg_node(pRExC_state, NOTHING);
- if (ret == NULL)
- ret = chain;
- }
- if (c == 1) {
- *flagp |= flags&SIMPLE;
- }
-
- return ret;
-}
-
-/*
- - regpiece - something followed by possible [*+?]
- *
- * Note that the branching code sequences used for ? and the general cases
- * of * and + are somewhat optimized: they use the same NOTHING node as
- * both the endmarker for their branch list and the body of the last branch.
- * It might seem that this node could be dispensed with entirely, but the
- * endmarker role is not redundant.
- */
-STATIC regnode *
-S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register char op;
- register char *next;
- I32 flags;
- const char * const origparse = RExC_parse;
- I32 min;
- I32 max = REG_INFTY;
- char *parse_start;
- const char *maxpos = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPIECE;
-
- DEBUG_PARSE("piec");
-
- ret = regatom(pRExC_state, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN)
- *flagp |= TRYAGAIN;
- return(NULL);
- }
-
- op = *RExC_parse;
-
- if (op == '{' && regcurly(RExC_parse)) {
- maxpos = NULL;
- parse_start = RExC_parse; /* MJD */
- next = RExC_parse + 1;
- while (isDIGIT(*next) || *next == ',') {
- if (*next == ',') {
- if (maxpos)
- break;
- else
- maxpos = next;
- }
- next++;
- }
- if (*next == '}') { /* got one */
- if (!maxpos)
- maxpos = next;
- RExC_parse++;
- min = atoi(RExC_parse);
- if (*maxpos == ',')
- maxpos++;
- else
- maxpos = RExC_parse;
- max = atoi(maxpos);
- if (!max && *maxpos != '0')
- max = REG_INFTY; /* meaning "infinity" */
- else if (max >= REG_INFTY)
- vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1);
- RExC_parse = next;
- nextchar(pRExC_state);
-
- do_curly:
- if ((flags&SIMPLE)) {
- RExC_naughty += 2 + RExC_naughty / 2;
- reginsert(pRExC_state, CURLY, ret, depth+1);
- Set_Node_Offset(ret, parse_start+1); /* MJD */
- Set_Node_Cur_Length(ret);
- }
- else {
- regnode * const w = reg_node(pRExC_state, WHILEM);
-
- w->flags = 0;
- REGTAIL(pRExC_state, ret, w);
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, LONGJMP,ret, depth+1);
- reginsert(pRExC_state, NOTHING,ret, depth+1);
- NEXT_OFF(ret) = 3; /* Go over LONGJMP. */
- }
- reginsert(pRExC_state, CURLYX,ret, depth+1);
- /* MJD hk */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Length(ret,
- op == '{' ? (RExC_parse - parse_start) : 1);
-
- if (!SIZE_ONLY && RExC_extralen)
- NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */
- REGTAIL(pRExC_state, ret, reg_node(pRExC_state, NOTHING));
- if (SIZE_ONLY)
- RExC_whilem_seen++, RExC_extralen += 3;
- RExC_naughty += 4 + RExC_naughty; /* compound interest */
- }
- ret->flags = 0;
-
- if (min > 0)
- *flagp = WORST;
- if (max > 0)
- *flagp |= HASWIDTH;
- if (max < min)
- vFAIL("Can't do {n,m} with n > m");
- if (!SIZE_ONLY) {
- ARG1_SET(ret, (U16)min);
- ARG2_SET(ret, (U16)max);
- }
-
- goto nest_check;
- }
- }
-
- if (!ISMULT1(op)) {
- *flagp = flags;
- return(ret);
- }
-
-#if 0 /* Now runtime fix should be reliable. */
-
- /* if this is reinstated, don't forget to put this back into perldiag:
-
- =item Regexp *+ operand could be empty at {#} in regex m/%s/
-
- (F) The part of the regexp subject to either the * or + quantifier
- could match an empty string. The {#} shows in the regular
- expression about where the problem was discovered.
-
- */
-
- if (!(flags&HASWIDTH) && op != '?')
- vFAIL("Regexp *+ operand could be empty");
-#endif
-
- parse_start = RExC_parse;
- nextchar(pRExC_state);
-
- *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH);
-
- if (op == '*' && (flags&SIMPLE)) {
- reginsert(pRExC_state, STAR, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 4;
- }
- else if (op == '*') {
- min = 0;
- goto do_curly;
- }
- else if (op == '+' && (flags&SIMPLE)) {
- reginsert(pRExC_state, PLUS, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 3;
- }
- else if (op == '+') {
- min = 1;
- goto do_curly;
- }
- else if (op == '?') {
- min = 0; max = 1;
- goto do_curly;
- }
- nest_check:
- if (!SIZE_ONLY && !(flags&(HASWIDTH|POSTPONED)) && max > REG_INFTY/3 && ckWARN(WARN_REGEXP)) {
- vWARN3(RExC_parse,
- "%.*s matches null string many times",
- (int)(RExC_parse >= origparse ? RExC_parse - origparse : 0),
- origparse);
- }
-
- if (RExC_parse < RExC_end && *RExC_parse == '?') {
- nextchar(pRExC_state);
- reginsert(pRExC_state, MINMOD, ret, depth+1);
- REGTAIL(pRExC_state, ret, ret + NODE_STEP_REGNODE);
- }
-#ifndef REG_ALLOW_MINMOD_SUSPEND
- else
-#endif
- if (RExC_parse < RExC_end && *RExC_parse == '+') {
- regnode *ender;
- nextchar(pRExC_state);
- ender = reg_node(pRExC_state, SUCCEED);
- REGTAIL(pRExC_state, ret, ender);
- reginsert(pRExC_state, SUSPEND, ret, depth+1);
- ret->flags = 0;
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, ret, ender);
- /*ret= ender;*/
- }
-
- if (RExC_parse < RExC_end && ISMULT2(RExC_parse)) {
- RExC_parse++;
- vFAIL("Nested quantifiers");
- }
-
- return(ret);
-}
-
-
-/* reg_namedseq(pRExC_state,UVp)
-
- This is expected to be called by a parser routine that has
- recognized '\N' and needs to handle the rest. RExC_parse is
- expected to point at the first char following the N at the time
- of the call.
-
- If valuep is non-null then it is assumed that we are parsing inside
- of a charclass definition and the first codepoint in the resolved
- string is returned via *valuep and the routine will return NULL.
- In this mode if a multichar string is returned from the charnames
- handler a warning will be issued, and only the first char in the
- sequence will be examined. If the string returned is zero length
- then the value of *valuep is undefined and NON-NULL will
- be returned to indicate failure. (This will NOT be a valid pointer
- to a regnode.)
-
- If valuep is null then it is assumed that we are parsing normal text
- and inserts a new EXACT node into the program containing the resolved
- string and returns a pointer to the new node. If the string is
- zerolength a NOTHING node is emitted.
-
- On success RExC_parse is set to the char following the endbrace.
- Parsing failures will generate a fatal errorvia vFAIL(...)
-
- NOTE: We cache all results from the charnames handler locally in
- the RExC_charnames hash (created on first use) to prevent a charnames
- handler from playing silly-buggers and returning a short string and
- then a long string for a given pattern. Since the regexp program
- size is calculated during an initial parse this would result
- in a buffer overrun so we cache to prevent the charname result from
- changing during the course of the parse.
-
- */
-STATIC regnode *
-S_reg_namedseq(pTHX_ RExC_state_t *pRExC_state, UV *valuep, I32 *flagp)
-{
- char * name; /* start of the content of the name */
- char * endbrace; /* endbrace following the name */
- SV *sv_str = NULL;
- SV *sv_name = NULL;
- STRLEN len; /* this has various purposes throughout the code */
- bool cached = 0; /* if this is true then we shouldn't refcount dev sv_str */
- regnode *ret = NULL;
-
- PERL_ARGS_ASSERT_REG_NAMEDSEQ;
-
- if (*RExC_parse != '{' ||
- (*RExC_parse == '{' && RExC_parse[1]
- && strchr("0123456789", RExC_parse[1])))
- {
- GET_RE_DEBUG_FLAGS_DECL;
- if (valuep)
- /* no bare \N in a charclass */
- vFAIL("Missing braces on \\N{}");
- GET_RE_DEBUG_FLAGS;
- nextchar(pRExC_state);
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- RExC_parse--;
- Set_Node_Length(ret, 1); /* MJD */
- return ret;
- }
- name = RExC_parse+1;
- endbrace = strchr(RExC_parse, '}');
- if ( ! endbrace ) {
- RExC_parse++;
- vFAIL("Missing right brace on \\N{}");
- }
- RExC_parse = endbrace + 1;
-
-
- /* RExC_parse points at the beginning brace,
- endbrace points at the last */
- if ( name[0]=='U' && name[1]=='+' ) {
- /* its a "Unicode hex" notation {U+89AB} */
- I32 fl = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX
- | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0);
- UV cp;
- len = (STRLEN)(endbrace - name - 2);
- cp = grok_hex(name + 2, &len, &fl, NULL);
- if ( len != (STRLEN)(endbrace - name - 2) ) {
- cp = 0xFFFD;
- }
- if ( valuep ) {
- if (cp > 0xff) RExC_utf8 = 1;
- *valuep = cp;
- return NULL;
- }
-
- /* Need to convert to utf8 if either: won't fit into a byte, or the re
- * is going to be in utf8 and the representation changes under utf8. */
- if (cp > 0xff || (RExC_utf8 && ! UNI_IS_INVARIANT(cp))) {
- U8 string[UTF8_MAXBYTES+1];
- U8 *tmps;
- RExC_utf8 = 1;
- tmps = uvuni_to_utf8(string, cp);
- sv_str = newSVpvn_utf8((char*)string, tmps - string, TRUE);
- } else { /* Otherwise, no need for utf8, can skip that step */
- char string;
- string = (char)cp;
- sv_str= newSVpvn(&string, 1);
- }
- } else {
- /* fetch the charnames handler for this scope */
- HV * const table = GvHV(PL_hintgv);
- SV **cvp= table ?
- hv_fetchs(table, "charnames", FALSE) :
- NULL;
- SV *cv= cvp ? *cvp : NULL;
- HE *he_str;
- int count;
- /* create an SV with the name as argument */
- sv_name = newSVpvn(name, endbrace - name);
-
- if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
- vFAIL2("Constant(\\N{%s}) unknown: "
- "(possibly a missing \"use charnames ...\")",
- SvPVX(sv_name));
- }
- if (!cvp || !SvOK(*cvp)) { /* when $^H{charnames} = undef; */
- vFAIL2("Constant(\\N{%s}): "
- "$^H{charnames} is not defined",SvPVX(sv_name));
- }
-
-
-
- if (!RExC_charnames) {
- /* make sure our cache is allocated */
- RExC_charnames = newHV();
- sv_2mortal(MUTABLE_SV(RExC_charnames));
- }
- /* see if we have looked this one up before */
- he_str = hv_fetch_ent( RExC_charnames, sv_name, 0, 0 );
- if ( he_str ) {
- sv_str = HeVAL(he_str);
- cached = 1;
- } else {
- dSP ;
-
- ENTER ;
- SAVETMPS ;
- PUSHMARK(SP) ;
-
- XPUSHs(sv_name);
-
- PUTBACK ;
-
- count= call_sv(cv, G_SCALAR);
-
- if (count == 1) { /* XXXX is this right? dmq */
- sv_str = POPs;
- SvREFCNT_inc_simple_void(sv_str);
- }
-
- SPAGAIN ;
- PUTBACK ;
- FREETMPS ;
- LEAVE ;
-
- if ( !sv_str || !SvOK(sv_str) ) {
- vFAIL2("Constant(\\N{%s}): Call to &{$^H{charnames}} "
- "did not return a defined value",SvPVX(sv_name));
- }
- if (hv_store_ent( RExC_charnames, sv_name, sv_str, 0))
- cached = 1;
- }
- }
- if (valuep) {
- char *p = SvPV(sv_str, len);
- if (len) {
- STRLEN numlen = 1;
- if ( SvUTF8(sv_str) ) {
- *valuep = utf8_to_uvchr((U8*)p, &numlen);
- if (*valuep > 0x7F)
- RExC_utf8 = 1;
- /* XXXX
- We have to turn on utf8 for high bit chars otherwise
- we get failures with
-
- "ss" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
- "SS" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
-
- This is different from what \x{} would do with the same
- codepoint, where the condition is > 0xFF.
- - dmq
- */
-
-
- } else {
- *valuep = (UV)*p;
- /* warn if we havent used the whole string? */
- }
- if (numlen<len && SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- vWARN2(RExC_parse,
- "Ignoring excess chars from \\N{%s} in character class",
- SvPVX(sv_name)
- );
- }
- } else if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- vWARN2(RExC_parse,
- "Ignoring zero length \\N{%s} in character class",
- SvPVX(sv_name)
- );
- }
- if (sv_name)
- SvREFCNT_dec(sv_name);
- if (!cached)
- SvREFCNT_dec(sv_str);
- return len ? NULL : (regnode *)&len;
- } else if(SvCUR(sv_str)) {
-
- char *s;
- char *p, *pend;
- STRLEN charlen = 1;
-#ifdef DEBUGGING
- char * parse_start = name-3; /* needed for the offsets */
-#endif
- GET_RE_DEBUG_FLAGS_DECL; /* needed for the offsets */
-
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s= STRING(ret);
-
- if ( RExC_utf8 && !SvUTF8(sv_str) ) {
- sv_utf8_upgrade(sv_str);
- } else if ( !RExC_utf8 && SvUTF8(sv_str) ) {
- RExC_utf8= 1;
- }
-
- p = SvPV(sv_str, len);
- pend = p + len;
- /* len is the length written, charlen is the size the char read */
- for ( len = 0; p < pend; p += charlen ) {
- if (UTF) {
- UV uvc = utf8_to_uvchr((U8*)p, &charlen);
- if (FOLD) {
- STRLEN foldlen,numlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
- uvc = toFOLD_uni(uvc, tmpbuf, &foldlen);
- /* Emit all the Unicode characters. */
-
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen)
- {
- uvc = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- } else {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- } else {
- len++;
- REGC(*p, s++);
- }
- }
- if (SIZE_ONLY) {
- RExC_size += STR_SZ(len);
- } else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- } else { /* zero length */
- ret = reg_node(pRExC_state,NOTHING);
- }
- if (!cached) {
- SvREFCNT_dec(sv_str);
- }
- if (sv_name) {
- SvREFCNT_dec(sv_name);
- }
- return ret;
-
-}
-
-
-/*
- * reg_recode
- *
- * It returns the code point in utf8 for the value in *encp.
- * value: a code value in the source encoding
- * encp: a pointer to an Encode object
- *
- * If the result from Encode is not a single character,
- * it returns U+FFFD (Replacement character) and sets *encp to NULL.
- */
-STATIC UV
-S_reg_recode(pTHX_ const char value, SV **encp)
-{
- STRLEN numlen = 1;
- SV * const sv = newSVpvn_flags(&value, numlen, SVs_TEMP);
- const char * const s = *encp ? sv_recode_to_utf8(sv, *encp) : SvPVX(sv);
- const STRLEN newlen = SvCUR(sv);
- UV uv = UNICODE_REPLACEMENT;
-
- PERL_ARGS_ASSERT_REG_RECODE;
-
- if (newlen)
- uv = SvUTF8(sv)
- ? utf8n_to_uvchr((U8*)s, newlen, &numlen, UTF8_ALLOW_DEFAULT)
- : *(U8*)s;
-
- if (!newlen || numlen != newlen) {
- uv = UNICODE_REPLACEMENT;
- *encp = NULL;
- }
- return uv;
-}
-
-
-/*
- - regatom - the lowest level
-
- Try to identify anything special at the start of the pattern. If there
- is, then handle it as required. This may involve generating a single regop,
- such as for an assertion; or it may involve recursing, such as to
- handle a () structure.
-
- If the string doesn't start with something special then we gobble up
- as much literal text as we can.
-
- Once we have been able to handle whatever type of thing started the
- sequence, we return.
-
- Note: we have to be careful with escapes, as they can be both literal
- and special, and in the case of \10 and friends can either, depending
- on context. Specifically there are two seperate switches for handling
- escape sequences, with the one for handling literal escapes requiring
- a dummy entry for all of the special escapes that are actually handled
- by the other.
-*/
-
-STATIC regnode *
-S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret = NULL;
- I32 flags;
- char *parse_start = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_PARSE("atom");
- *flagp = WORST; /* Tentatively. */
-
- PERL_ARGS_ASSERT_REGATOM;
-
-tryagain:
- switch ((U8)*RExC_parse) {
- case '^':
- RExC_seen_zerolen++;
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MBOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SBOL);
- else
- ret = reg_node(pRExC_state, BOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '$':
- nextchar(pRExC_state);
- if (*RExC_parse)
- RExC_seen_zerolen++;
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MEOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SEOL);
- else
- ret = reg_node(pRExC_state, EOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '.':
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SANY);
- else
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '[':
- {
- char * const oregcomp_parse = ++RExC_parse;
- ret = regclass(pRExC_state,depth+1);
- if (*RExC_parse != ']') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched [");
- }
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */
- break;
- }
- case '(':
- nextchar(pRExC_state);
- ret = reg(pRExC_state, 1, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN) {
- if (RExC_parse == RExC_end) {
- /* Make parent create an empty node if needed. */
- *flagp |= TRYAGAIN;
- return(NULL);
- }
- goto tryagain;
- }
- return(NULL);
- }
- *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE|POSTPONED);
- break;
- case '|':
- case ')':
- if (flags & TRYAGAIN) {
- *flagp |= TRYAGAIN;
- return NULL;
- }
- vFAIL("Internal urp");
- /* Supposed to be caught earlier. */
- break;
- case '{':
- if (!regcurly(RExC_parse)) {
- RExC_parse++;
- goto defchar;
- }
- /* FALL THROUGH */
- case '?':
- case '+':
- case '*':
- RExC_parse++;
- vFAIL("Quantifier follows nothing");
- break;
- case 0xDF:
- case 0xC3:
- case 0xCE:
- do_foldchar:
- if (!LOC && FOLD) {
- U32 len,cp;
- len=0; /* silence a spurious compiler warning */
- if ((cp = what_len_TRICKYFOLD_safe(RExC_parse,RExC_end,UTF,len))) {
- *flagp |= HASWIDTH; /* could be SIMPLE too, but needs a handler in regexec.regrepeat */
- RExC_parse+=len-1; /* we get one from nextchar() as well. :-( */
- ret = reganode(pRExC_state, FOLDCHAR, cp);
- Set_Node_Length(ret, 1); /* MJD */
- nextchar(pRExC_state); /* kill whitespace under /x */
- return ret;
- }
- }
- goto outer_default;
- case '\\':
- /* Special Escapes
-
- This switch handles escape sequences that resolve to some kind
- of special regop and not to literal text. Escape sequnces that
- resolve to literal text are handled below in the switch marked
- "Literal Escapes".
-
- Every entry in this switch *must* have a corresponding entry
- in the literal escape switch. However, the opposite is not
- required, as the default for this switch is to jump to the
- literal text handling code.
- */
- switch ((U8)*++RExC_parse) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- goto do_foldchar;
- /* Special Escapes */
- case 'A':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, SBOL);
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'G':
- ret = reg_node(pRExC_state, GPOS);
- RExC_seen |= REG_SEEN_GPOS;
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'K':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, KEEPS);
- *flagp |= SIMPLE;
- /* XXX:dmq : disabling in-place substitution seems to
- * be necessary here to avoid cases of memory corruption, as
- * with: C<$_="x" x 80; s/x\K/y/> -- rgs
- */
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- goto finish_meta_pat;
- case 'Z':
- ret = reg_node(pRExC_state, SEOL);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'z':
- ret = reg_node(pRExC_state, EOS);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'C':
- ret = reg_node(pRExC_state, CANY);
- RExC_seen |= REG_SEEN_CANY;
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'X':
- ret = reg_node(pRExC_state, CLUMP);
- *flagp |= HASWIDTH;
- goto finish_meta_pat;
- case 'w':
- ret = reg_node(pRExC_state, (U8)(LOC ? ALNUML : ALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'W':
- ret = reg_node(pRExC_state, (U8)(LOC ? NALNUML : NALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'b':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? BOUNDL : BOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'B':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? NBOUNDL : NBOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 's':
- ret = reg_node(pRExC_state, (U8)(LOC ? SPACEL : SPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'S':
- ret = reg_node(pRExC_state, (U8)(LOC ? NSPACEL : NSPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'd':
- ret = reg_node(pRExC_state, DIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'D':
- ret = reg_node(pRExC_state, NDIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'R':
- ret = reg_node(pRExC_state, LNBREAK);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'h':
- ret = reg_node(pRExC_state, HORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'H':
- ret = reg_node(pRExC_state, NHORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'v':
- ret = reg_node(pRExC_state, VERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'V':
- ret = reg_node(pRExC_state, NVERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- finish_meta_pat:
- nextchar(pRExC_state);
- Set_Node_Length(ret, 2); /* MJD */
- break;
- case 'p':
- case 'P':
- {
- char* const oldregxend = RExC_end;
-#ifdef DEBUGGING
- char* parse_start = RExC_parse - 2;
-#endif
-
- if (RExC_parse[1] == '{') {
- /* a lovely hack--pretend we saw [\pX] instead */
- RExC_end = strchr(RExC_parse, '}');
- if (!RExC_end) {
- const U8 c = (U8)*RExC_parse;
- RExC_parse += 2;
- RExC_end = oldregxend;
- vFAIL2("Missing right brace on \\%c{}", c);
- }
- RExC_end++;
- }
- else {
- RExC_end = RExC_parse + 2;
- if (RExC_end > oldregxend)
- RExC_end = oldregxend;
- }
- RExC_parse--;
-
- ret = regclass(pRExC_state,depth+1);
-
- RExC_end = oldregxend;
- RExC_parse--;
-
- Set_Node_Offset(ret, parse_start + 2);
- Set_Node_Cur_Length(ret);
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- }
- break;
- case 'N':
- /* Handle \N and \N{NAME} here and not below because it can be
- multicharacter. join_exact() will join them up later on.
- Also this makes sure that things like /\N{BLAH}+/ and
- \N{BLAH} being multi char Just Happen. dmq*/
- ++RExC_parse;
- ret= reg_namedseq(pRExC_state, NULL, flagp);
- break;
- case 'k': /* Handle \k<NAME> and \k'NAME' */
- parse_named_seq:
- {
- char ch= RExC_parse[1];
- if (ch != '<' && ch != '\'' && ch != '{') {
- RExC_parse++;
- vFAIL2("Sequence %.2s... not terminated",parse_start);
- } else {
- /* this pretty much dupes the code for (?P=...) in reg(), if
- you change this make sure you change that */
- char* name_start = (RExC_parse += 2);
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- ch= (ch == '<') ? '>' : (ch == '{') ? '}' : '\'';
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
-
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
-
- }
- break;
- }
- case 'g':
- case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 num;
- bool isg = *RExC_parse == 'g';
- bool isrel = 0;
- bool hasbrace = 0;
- if (isg) {
- RExC_parse++;
- if (*RExC_parse == '{') {
- RExC_parse++;
- hasbrace = 1;
- }
- if (*RExC_parse == '-') {
- RExC_parse++;
- isrel = 1;
- }
- if (hasbrace && !isDIGIT(*RExC_parse)) {
- if (isrel) RExC_parse--;
- RExC_parse -= 2;
- goto parse_named_seq;
- } }
- num = atoi(RExC_parse);
- if (isg && num == 0)
- vFAIL("Reference to invalid group 0");
- if (isrel) {
- num = RExC_npar - num;
- if (num < 1)
- vFAIL("Reference to nonexistent or unclosed group");
- }
- if (!isg && num > 9 && num >= RExC_npar)
- goto defchar;
- else {
- char * const parse_start = RExC_parse - 1; /* MJD */
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (parse_start == RExC_parse - 1)
- vFAIL("Unterminated \\g... pattern");
- if (hasbrace) {
- if (*RExC_parse != '}')
- vFAIL("Unterminated \\g{...} pattern");
- RExC_parse++;
- }
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens)
- vFAIL("Reference to nonexistent group");
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? REFFL : REFF) : REF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- }
- }
- break;
- case '\0':
- if (RExC_parse >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- /* Do not generate "unrecognized" warnings here, we fall
- back into the quick-grab loop below */
- parse_start--;
- goto defchar;
- }
- break;
-
- case '#':
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if ( reg_skipcomment( pRExC_state ) )
- goto tryagain;
- }
- /* FALL THROUGH */
-
- default:
- outer_default:{
- register STRLEN len;
- register UV ender;
- register char *p;
- char *s;
- STRLEN foldlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
-
- parse_start = RExC_parse - 1;
-
- RExC_parse++;
-
- defchar:
- ender = 0;
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s = STRING(ret);
- for (len = 0, p = RExC_parse - 1;
- len < 127 && p < RExC_end;
- len++)
- {
- char * const oldp = p;
-
- if (RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- switch ((U8)*p) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case '^':
- case '$':
- case '.':
- case '[':
- case '(':
- case ')':
- case '|':
- goto loopdone;
- case '\\':
- /* Literal Escapes Switch
-
- This switch is meant to handle escape sequences that
- resolve to a literal character.
-
- Every escape sequence that represents something
- else, like an assertion or a char class, is handled
- in the switch marked 'Special Escapes' above in this
- routine, but also has an entry here as anything that
- isn't explicitly mentioned here will be treated as
- an unescaped equivalent literal.
- */
-
- switch ((U8)*++p) {
- /* These are all the special escapes. */
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case 'A': /* Start assertion */
- case 'b': case 'B': /* Word-boundary assertion*/
- case 'C': /* Single char !DANGEROUS! */
- case 'd': case 'D': /* digit class */
- case 'g': case 'G': /* generic-backref, pos assertion */
- case 'h': case 'H': /* HORIZWS */
- case 'k': case 'K': /* named backref, keep marker */
- case 'N': /* named char sequence */
- case 'p': case 'P': /* Unicode property */
- case 'R': /* LNBREAK */
- case 's': case 'S': /* space class */
- case 'v': case 'V': /* VERTWS */
- case 'w': case 'W': /* word class */
- case 'X': /* eXtended Unicode "combining character sequence" */
- case 'z': case 'Z': /* End of line/string assertion */
- --p;
- goto loopdone;
-
- /* Anything after here is an escape that resolves to a
- literal. (Except digits, which may or may not)
- */
- case 'n':
- ender = '\n';
- p++;
- break;
- case 'r':
- ender = '\r';
- p++;
- break;
- case 't':
- ender = '\t';
- p++;
- break;
- case 'f':
- ender = '\f';
- p++;
- break;
- case 'e':
- ender = ASCII_TO_NATIVE('\033');
- p++;
- break;
- case 'a':
- ender = ASCII_TO_NATIVE('\007');
- p++;
- break;
- case 'x':
- if (*++p == '{') {
- char* const e = strchr(p, '}');
-
- if (!e) {
- RExC_parse = p + 1;
- vFAIL("Missing right brace on \\x{}");
- }
- else {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = e - p - 1;
- ender = grok_hex(p + 1, &numlen, &flags, NULL);
- if (ender > 0xff)
- RExC_utf8 = 1;
- p = e + 1;
- }
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = 2;
- ender = grok_hex(p, &numlen, &flags, NULL);
- p += numlen;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- p++;
- ender = UCHARAT(p++);
- ender = toCTRL(ender);
- break;
- case '0': case '1': case '2': case '3':case '4':
- case '5': case '6': case '7': case '8':case '9':
- if (*p == '0' ||
- (isDIGIT(p[1]) && atoi(p) >= RExC_npar) ) {
- I32 flags = 0;
- STRLEN numlen = 3;
- ender = grok_oct(p, &numlen, &flags, NULL);
-
- /* An octal above 0xff is interpreted differently
- * depending on if the re is in utf8 or not. If it
- * is in utf8, the value will be itself, otherwise
- * it is interpreted as modulo 0x100. It has been
- * decided to discourage the use of octal above the
- * single-byte range. For now, warn only when
- * it ends up modulo */
- if (SIZE_ONLY && ender >= 0x100
- && ! UTF && ! PL_encoding
- && ckWARN2(WARN_DEPRECATED, WARN_REGEXP)) {
- vWARNdep(p, "Use of octal value above 377 is deprecated");
- }
- p += numlen;
- }
- else {
- --p;
- goto loopdone;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- recode_encoding:
- {
- SV* enc = PL_encoding;
- ender = reg_recode((const char)(U8)ender, &enc);
- if (!enc && SIZE_ONLY && ckWARN(WARN_REGEXP))
- vWARN(p, "Invalid escape in the specified encoding");
- RExC_utf8 = 1;
- }
- break;
- case '\0':
- if (p >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- if (!SIZE_ONLY&& isALPHA(*p) && ckWARN(WARN_REGEXP))
- vWARN2(p + 1, "Unrecognized escape \\%c passed through", UCHARAT(p));
- goto normal_default;
- }
- break;
- default:
- normal_default:
- if (UTF8_IS_START(*p) && UTF) {
- STRLEN numlen;
- ender = utf8n_to_uvchr((U8*)p, RExC_end - p,
- &numlen, UTF8_ALLOW_DEFAULT);
- p += numlen;
- }
- else
- ender = *p++;
- break;
- }
- if ( RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- if (UTF && FOLD) {
- /* Prime the casefolded buffer. */
- ender = toFOLD_uni(ender, tmpbuf, &foldlen);
- }
- if (p < RExC_end && ISMULT2(p)) { /* Back off on ?+*. */
- if (len)
- p = oldp;
- else if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- }
- else {
- len++;
- REGC((char)ender, s++);
- }
- break;
- }
- if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- len += unilen;
- s += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break;
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- len--;
- }
- else
- REGC((char)ender, s++);
- }
- loopdone:
- RExC_parse = p - 1;
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
- {
- /* len is STRLEN which is unsigned, need to copy to signed */
- IV iv = len;
- if (iv < 0)
- vFAIL("Internal disaster");
- }
- if (len > 0)
- *flagp |= HASWIDTH;
- if (len == 1 && UNI_IS_INVARIANT(ender))
- *flagp |= SIMPLE;
-
- if (SIZE_ONLY)
- RExC_size += STR_SZ(len);
- else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- }
- break;
- }
-
- return(ret);
-}
-
-STATIC char *
-S_regwhite( RExC_state_t *pRExC_state, char *p )
-{
- const char *e = RExC_end;
-
- PERL_ARGS_ASSERT_REGWHITE;
-
- while (p < e) {
- if (isSPACE(*p))
- ++p;
- else if (*p == '#') {
- bool ended = 0;
- do {
- if (*p++ == '\n') {
- ended = 1;
- break;
- }
- } while (p < e);
- if (!ended)
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- }
- else
- break;
- }
- return p;
-}
-
-/* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]].
- Character classes ([:foo:]) can also be negated ([:^foo:]).
- Returns a named class id (ANYOF_XXX) if successful, -1 otherwise.
- Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed,
- but trigger failures because they are currently unimplemented. */
-
-#define POSIXCC_DONE(c) ((c) == ':')
-#define POSIXCC_NOTYET(c) ((c) == '=' || (c) == '.')
-#define POSIXCC(c) (POSIXCC_DONE(c) || POSIXCC_NOTYET(c))
-
-STATIC I32
-S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value)
-{
- dVAR;
- I32 namedclass = OOB_NAMEDCLASS;
-
- PERL_ARGS_ASSERT_REGPPOSIXCC;
-
- if (value == '[' && RExC_parse + 1 < RExC_end &&
- /* I smell either [: or [= or [. -- POSIX has been here, right? */
- POSIXCC(UCHARAT(RExC_parse))) {
- const char c = UCHARAT(RExC_parse);
- char* const s = RExC_parse++;
-
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != c)
- RExC_parse++;
- if (RExC_parse == RExC_end)
- /* Grandfather lone [:, [=, [. */
- RExC_parse = s;
- else {
- const char* const t = RExC_parse++; /* skip over the c */
- assert(*t == c);
-
- if (UCHARAT(RExC_parse) == ']') {
- const char *posixcc = s + 1;
- RExC_parse++; /* skip over the ending ] */
-
- if (*s == ':') {
- const I32 complement = *posixcc == '^' ? *posixcc++ : 0;
- const I32 skip = t - posixcc;
-
- /* Initially switch on the length of the name. */
- switch (skip) {
- case 4:
- if (memEQ(posixcc, "word", 4)) /* this is not POSIX, this is the Perl \w */
- namedclass = complement ? ANYOF_NALNUM : ANYOF_ALNUM;
- break;
- case 5:
- /* Names all of length 5. */
- /* alnum alpha ascii blank cntrl digit graph lower
- print punct space upper */
- /* Offset 4 gives the best switch position. */
- switch (posixcc[4]) {
- case 'a':
- if (memEQ(posixcc, "alph", 4)) /* alpha */
- namedclass = complement ? ANYOF_NALPHA : ANYOF_ALPHA;
- break;
- case 'e':
- if (memEQ(posixcc, "spac", 4)) /* space */
- namedclass = complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC;
- break;
- case 'h':
- if (memEQ(posixcc, "grap", 4)) /* graph */
- namedclass = complement ? ANYOF_NGRAPH : ANYOF_GRAPH;
- break;
- case 'i':
- if (memEQ(posixcc, "asci", 4)) /* ascii */
- namedclass = complement ? ANYOF_NASCII : ANYOF_ASCII;
- break;
- case 'k':
- if (memEQ(posixcc, "blan", 4)) /* blank */
- namedclass = complement ? ANYOF_NBLANK : ANYOF_BLANK;
- break;
- case 'l':
- if (memEQ(posixcc, "cntr", 4)) /* cntrl */
- namedclass = complement ? ANYOF_NCNTRL : ANYOF_CNTRL;
- break;
- case 'm':
- if (memEQ(posixcc, "alnu", 4)) /* alnum */
- namedclass = complement ? ANYOF_NALNUMC : ANYOF_ALNUMC;
- break;
- case 'r':
- if (memEQ(posixcc, "lowe", 4)) /* lower */
- namedclass = complement ? ANYOF_NLOWER : ANYOF_LOWER;
- else if (memEQ(posixcc, "uppe", 4)) /* upper */
- namedclass = complement ? ANYOF_NUPPER : ANYOF_UPPER;
- break;
- case 't':
- if (memEQ(posixcc, "digi", 4)) /* digit */
- namedclass = complement ? ANYOF_NDIGIT : ANYOF_DIGIT;
- else if (memEQ(posixcc, "prin", 4)) /* print */
- namedclass = complement ? ANYOF_NPRINT : ANYOF_PRINT;
- else if (memEQ(posixcc, "punc", 4)) /* punct */
- namedclass = complement ? ANYOF_NPUNCT : ANYOF_PUNCT;
- break;
- }
- break;
- case 6:
- if (memEQ(posixcc, "xdigit", 6))
- namedclass = complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT;
- break;
- }
-
- if (namedclass == OOB_NAMEDCLASS)
- Simple_vFAIL3("POSIX class [:%.*s:] unknown",
- t - s - 1, s + 1);
- assert (posixcc[skip] == ':');
- assert (posixcc[skip+1] == ']');
- } else if (!SIZE_ONLY) {
- /* [[=foo=]] and [[.foo.]] are still future. */
-
- /* adjust RExC_parse so the warning shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse) != ']')
- RExC_parse++;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- } else {
- /* Maternal grandfather:
- * "[:" ending in ":" but not in ":]" */
- RExC_parse = s;
- }
- }
- }
-
- return namedclass;
-}
-
-STATIC void
-S_checkposixcc(pTHX_ RExC_state_t *pRExC_state)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_CHECKPOSIXCC;
-
- if (POSIXCC(UCHARAT(RExC_parse))) {
- const char *s = RExC_parse;
- const char c = *s++;
-
- while (isALNUM(*s))
- s++;
- if (*s && c == *s && s[1] == ']') {
- if (ckWARN(WARN_REGEXP))
- vWARN3(s+2,
- "POSIX syntax [%c %c] belongs inside character classes",
- c, c);
-
- /* [[=foo=]] and [[.foo.]] are still future. */
- if (POSIXCC_NOTYET(c)) {
- /* adjust RExC_parse so the error shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse++) != ']')
- NOOP;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- }
- }
-}
-
-
-#define _C_C_T_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_N##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '!'; \
- what = WORD; \
- break
-
-#define _C_C_T_NOLOC_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '!'; \
- what = WORD; \
- break
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define POSIX_CC_UNI_NAME(CCNAME) CCNAME
-#else
-#define POSIX_CC_UNI_NAME(CCNAME) "Posix" CCNAME
-#endif
-
-/*
- parse a class specification and produce either an ANYOF node that
- matches the pattern or if the pattern matches a single char only and
- that char is < 256 and we are case insensitive then we produce an
- EXACT node instead.
-*/
-
-STATIC regnode *
-S_regclass(pTHX_ RExC_state_t *pRExC_state, U32 depth)
-{
- dVAR;
- register UV nextvalue;
- register IV prevvalue = OOB_UNICODE;
- register IV range = 0;
- UV value = 0; /* XXX:dmq: needs to be referenceable (unfortunately) */
- register regnode *ret;
- STRLEN numlen;
- IV namedclass;
- char *rangebegin = NULL;
- bool need_class = 0;
- SV *listsv = NULL;
- UV n;
- bool optimize_invert = TRUE;
- AV* unicode_alternate = NULL;
-#ifdef EBCDIC
- UV literal_endpoint = 0;
-#endif
- UV stored = 0; /* number of chars stored in the class */
-
- regnode * const orig_emit = RExC_emit; /* Save the original RExC_emit in
- case we need to change the emitted regop to an EXACT. */
- const char * orig_parse = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCLASS;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- DEBUG_PARSE("clas");
-
- /* Assume we are going to generate an ANYOF node. */
- ret = reganode(pRExC_state, ANYOF, 0);
-
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) = 0;
-
- if (UCHARAT(RExC_parse) == '^') { /* Complement of range. */
- RExC_naughty++;
- RExC_parse++;
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) |= ANYOF_INVERT;
- }
-
- if (SIZE_ONLY) {
- RExC_size += ANYOF_SKIP;
- listsv = &PL_sv_undef; /* For code scanners: listsv always non-NULL. */
- }
- else {
- RExC_emit += ANYOF_SKIP;
- if (FOLD)
- ANYOF_FLAGS(ret) |= ANYOF_FOLD;
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_LOCALE;
- ANYOF_BITMAP_ZERO(ret);
- listsv = newSVpvs("# comment\n");
- }
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
-
- if (!SIZE_ONLY && POSIXCC(nextvalue))
- checkposixcc(pRExC_state);
-
- /* allow 1st char to be ] (allowing it to be - is dealt with later) */
- if (UCHARAT(RExC_parse) == ']')
- goto charclassloop;
-
-parseit:
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != ']') {
-
- charclassloop:
-
- namedclass = OOB_NAMEDCLASS; /* initialize as illegal */
-
- if (!range)
- rangebegin = RExC_parse;
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
- if (value == '[' && POSIXCC(nextvalue))
- namedclass = regpposixcc(pRExC_state, value);
- else if (value == '\\') {
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
- /* Some compilers cannot handle switching on 64-bit integer
- * values, therefore value cannot be an UV. Yes, this will
- * be a problem later if we want switch on Unicode.
- * A similar issue a little bit later when switching on
- * namedclass. --jhi */
- switch ((I32)value) {
- case 'w': namedclass = ANYOF_ALNUM; break;
- case 'W': namedclass = ANYOF_NALNUM; break;
- case 's': namedclass = ANYOF_SPACE; break;
- case 'S': namedclass = ANYOF_NSPACE; break;
- case 'd': namedclass = ANYOF_DIGIT; break;
- case 'D': namedclass = ANYOF_NDIGIT; break;
- case 'v': namedclass = ANYOF_VERTWS; break;
- case 'V': namedclass = ANYOF_NVERTWS; break;
- case 'h': namedclass = ANYOF_HORIZWS; break;
- case 'H': namedclass = ANYOF_NHORIZWS; break;
- case 'N': /* Handle \N{NAME} in class */
- {
- /* We only pay attention to the first char of
- multichar strings being returned. I kinda wonder
- if this makes sense as it does change the behaviour
- from earlier versions, OTOH that behaviour was broken
- as well. */
- UV v; /* value is register so we cant & it /grrr */
- if (reg_namedseq(pRExC_state, &v, NULL)) {
- goto parseit;
- }
- value= v;
- }
- break;
- case 'p':
- case 'P':
- {
- char *e;
- if (RExC_parse >= RExC_end)
- vFAIL2("Empty \\%c{}", (U8)value);
- if (*RExC_parse == '{') {
- const U8 c = (U8)value;
- e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL2("Missing right brace on \\%c{}", c);
- while (isSPACE(UCHARAT(RExC_parse)))
- RExC_parse++;
- if (e == RExC_parse)
- vFAIL2("Empty \\%c{}", c);
- n = e - RExC_parse;
- while (isSPACE(UCHARAT(RExC_parse + n - 1)))
- n--;
- }
- else {
- e = RExC_parse;
- n = 1;
- }
- if (!SIZE_ONLY) {
- if (UCHARAT(RExC_parse) == '^') {
- RExC_parse++;
- n--;
- value = value == 'p' ? 'P' : 'p'; /* toggle */
- while (isSPACE(UCHARAT(RExC_parse))) {
- RExC_parse++;
- n--;
- }
- }
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::%.*s\n",
- (value=='p' ? '+' : '!'), (int)n, RExC_parse);
- }
- RExC_parse = e + 1;
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- namedclass = ANYOF_MAX; /* no official name, but it's named */
- }
- break;
- case 'n': value = '\n'; break;
- case 'r': value = '\r'; break;
- case 't': value = '\t'; break;
- case 'f': value = '\f'; break;
- case 'b': value = '\b'; break;
- case 'e': value = ASCII_TO_NATIVE('\033');break;
- case 'a': value = ASCII_TO_NATIVE('\007');break;
- case 'x':
- if (*RExC_parse == '{') {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- char * const e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL("Missing right brace on \\x{}");
-
- numlen = e - RExC_parse;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse = e + 1;
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- numlen = 2;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- }
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- value = UCHARAT(RExC_parse++);
- value = toCTRL(value);
- break;
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 flags = 0;
- numlen = 3;
- value = grok_oct(--RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- }
- recode_encoding:
- {
- SV* enc = PL_encoding;
- value = reg_recode((const char)(U8)value, &enc);
- if (!enc && SIZE_ONLY && ckWARN(WARN_REGEXP))
- vWARN(RExC_parse,
- "Invalid escape in the specified encoding");
- break;
- }
- default:
- if (!SIZE_ONLY && isALPHA(value) && ckWARN(WARN_REGEXP))
- vWARN2(RExC_parse,
- "Unrecognized escape \\%c in character class passed through",
- (int)value);
- break;
- }
- } /* end of \blah */
-#ifdef EBCDIC
- else
- literal_endpoint++;
-#endif
-
- if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */
-
- if (!SIZE_ONLY && !need_class)
- ANYOF_CLASS_ZERO(ret);
-
- need_class = 1;
-
- /* a bad range like a-\d, a-[:digit:] ? */
- if (range) {
- if (!SIZE_ONLY) {
- if (ckWARN(WARN_REGEXP)) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- vWARN4(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
- }
- if (prevvalue < 256) {
- ANYOF_BITMAP_SET(ret, prevvalue);
- ANYOF_BITMAP_SET(ret, '-');
- }
- else {
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-');
- }
- }
-
- range = 0; /* this was not a true range */
- }
-
-
-
- if (!SIZE_ONLY) {
- const char *what = NULL;
- char yesno = 0;
-
- if (namedclass > OOB_NAMEDCLASS)
- optimize_invert = FALSE;
- /* Possible truncation here but in some 64-bit environments
- * the compiler gets heartburn about switch on 64-bit values.
- * A similar issue a little earlier when switching on value.
- * --jhi */
- switch ((I32)namedclass) {
-
- case _C_C_T_(ALNUMC, isALNUMC(value), POSIX_CC_UNI_NAME("Alnum"));
- case _C_C_T_(ALPHA, isALPHA(value), POSIX_CC_UNI_NAME("Alpha"));
- case _C_C_T_(BLANK, isBLANK(value), POSIX_CC_UNI_NAME("Blank"));
- case _C_C_T_(CNTRL, isCNTRL(value), POSIX_CC_UNI_NAME("Cntrl"));
- case _C_C_T_(GRAPH, isGRAPH(value), POSIX_CC_UNI_NAME("Graph"));
- case _C_C_T_(LOWER, isLOWER(value), POSIX_CC_UNI_NAME("Lower"));
- case _C_C_T_(PRINT, isPRINT(value), POSIX_CC_UNI_NAME("Print"));
- case _C_C_T_(PSXSPC, isPSXSPC(value), POSIX_CC_UNI_NAME("Space"));
- case _C_C_T_(PUNCT, isPUNCT(value), POSIX_CC_UNI_NAME("Punct"));
- case _C_C_T_(UPPER, isUPPER(value), POSIX_CC_UNI_NAME("Upper"));
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
- case _C_C_T_(ALNUM, isALNUM(value), "Word");
- case _C_C_T_(SPACE, isSPACE(value), "SpacePerl");
-#else
- case _C_C_T_(SPACE, isSPACE(value), "PerlSpace");
- case _C_C_T_(ALNUM, isALNUM(value), "PerlWord");
-#endif
- case _C_C_T_(XDIGIT, isXDIGIT(value), "XDigit");
- case _C_C_T_NOLOC_(VERTWS, is_VERTWS_latin1(&value), "VertSpace");
- case _C_C_T_NOLOC_(HORIZWS, is_HORIZWS_latin1(&value), "HorizSpace");
- case ANYOF_ASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_ASCII);
- else {
-#ifndef EBCDIC
- for (value = 0; value < 128; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '+';
- what = "ASCII";
- break;
- case ANYOF_NASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NASCII);
- else {
-#ifndef EBCDIC
- for (value = 128; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (!isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '!';
- what = "ASCII";
- break;
- case ANYOF_DIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_DIGIT);
- else {
- /* consecutive digits assumed */
- for (value = '0'; value <= '9'; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '+';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_NDIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NDIGIT);
- else {
- /* consecutive digits assumed */
- for (value = 0; value < '0'; value++)
- ANYOF_BITMAP_SET(ret, value);
- for (value = '9' + 1; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '!';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_MAX:
- /* this is to handle \p and \P */
- break;
- default:
- vFAIL("Invalid [::] class");
- break;
- }
- if (what) {
- /* Strings such as "+utf8::isWord\n" */
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::Is%s\n", yesno, what);
- }
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_CLASS;
- continue;
- }
- } /* end of namedclass \blah */
-
- if (range) {
- if (prevvalue > (IV)value) /* b-a */ {
- const int w = RExC_parse - rangebegin;
- Simple_vFAIL4("Invalid [] range \"%*.*s\"", w, w, rangebegin);
- range = 0; /* not a valid range */
- }
- }
- else {
- prevvalue = value; /* save the beginning of the range */
- if (*RExC_parse == '-' && RExC_parse+1 < RExC_end &&
- RExC_parse[1] != ']') {
- RExC_parse++;
-
- /* a bad range like \w-, [:word:]- ? */
- if (namedclass > OOB_NAMEDCLASS) {
- if (ckWARN(WARN_REGEXP)) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- vWARN4(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
- }
- if (!SIZE_ONLY)
- ANYOF_BITMAP_SET(ret, '-');
- } else
- range = 1; /* yeah, it's a range! */
- continue; /* but do it the next time */
- }
- }
-
- /* now is the next time */
- /*stored += (value - prevvalue + 1);*/
- if (!SIZE_ONLY) {
- if (prevvalue < 256) {
- const IV ceilvalue = value < 256 ? value : 255;
- IV i;
-#ifdef EBCDIC
- /* In EBCDIC [\x89-\x91] should include
- * the \x8e but [i-j] should not. */
- if (literal_endpoint == 2 &&
- ((isLOWER(prevvalue) && isLOWER(ceilvalue)) ||
- (isUPPER(prevvalue) && isUPPER(ceilvalue))))
- {
- if (isLOWER(prevvalue)) {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isLOWER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- } else {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isUPPER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- else
-#endif
- for (i = prevvalue; i <= ceilvalue; i++) {
- if (!ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- if (value > 255 || UTF) {
- const UV prevnatvalue = NATIVE_TO_UNI(prevvalue);
- const UV natvalue = NATIVE_TO_UNI(value);
- stored+=2; /* can't optimize this class */
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- if (prevnatvalue < natvalue) { /* what about > ? */
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n",
- prevnatvalue, natvalue);
- }
- else if (prevnatvalue == natvalue) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", natvalue);
- if (FOLD) {
- U8 foldbuf[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const UV f = to_uni_fold(natvalue, foldbuf, &foldlen);
-
-#ifdef EBCDIC /* RD t/uni/fold ff and 6b */
- if (RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xDF || f == 0x92)) {
- f = NATIVE_TO_UNI(f);
- }
-#endif
- /* If folding and foldable and a single
- * character, insert also the folded version
- * to the charclass. */
- if (f != value) {
-#ifdef EBCDIC /* RD tunifold ligatures s,t fb05, fb06 */
- if ((RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xA2 &&
- (value == 0xFB05 || value == 0xFB06))) ?
- foldlen == ((STRLEN)UNISKIP(f) - 1) :
- foldlen == (STRLEN)UNISKIP(f) )
-#else
- if (foldlen == (STRLEN)UNISKIP(f))
-#endif
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n", f);
- else {
- /* Any multicharacter foldings
- * require the following transform:
- * [ABCDEF] -> (?:[ABCabcDEFd]|pq|rst)
- * where E folds into "pq" and F folds
- * into "rst", all other characters
- * fold to single characters. We save
- * away these multicharacter foldings,
- * to be later saved as part of the
- * additional "s" data. */
- SV *sv;
-
- if (!unicode_alternate)
- unicode_alternate = newAV();
- sv = newSVpvn_utf8((char*)foldbuf, foldlen,
- TRUE);
- av_push(unicode_alternate, sv);
- }
- }
-
- /* If folding and the value is one of the Greek
- * sigmas insert a few more sigmas to make the
- * folding rules of the sigmas to work right.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (literal or EXACTF cases) are handled
- * during runtime in regexec.c:S_find_byclass(). */
- if (value == UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA);
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- else if (value == UNICODE_GREEK_CAPITAL_LETTER_SIGMA)
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- }
- }
-#ifdef EBCDIC
- literal_endpoint = 0;
-#endif
- }
-
- range = 0; /* this range (if it was one) is done now */
- }
-
- if (need_class) {
- ANYOF_FLAGS(ret) |= ANYOF_LARGE;
- if (SIZE_ONLY)
- RExC_size += ANYOF_CLASS_ADD_SKIP;
- else
- RExC_emit += ANYOF_CLASS_ADD_SKIP;
- }
-
-
- if (SIZE_ONLY)
- return ret;
- /****** !SIZE_ONLY AFTER HERE *********/
-
- if( stored == 1 && (value < 128 || (value < 256 && !UTF))
- && !( ANYOF_FLAGS(ret) & ( ANYOF_FLAGS_ALL ^ ANYOF_FOLD ) )
- ) {
- /* optimize single char class to an EXACT node
- but *only* when its not a UTF/high char */
- const char * cur_parse= RExC_parse;
- RExC_emit = (regnode *)orig_emit;
- RExC_parse = (char *)orig_parse;
- ret = reg_node(pRExC_state,
- (U8)((ANYOF_FLAGS(ret) & ANYOF_FOLD) ? EXACTF : EXACT));
- RExC_parse = (char *)cur_parse;
- *STRING(ret)= (char)value;
- STR_LEN(ret)= 1;
- RExC_emit += STR_SZ(1);
- if (listsv) {
- SvREFCNT_dec(listsv);
- }
- return ret;
- }
- /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */
- if ( /* If the only flag is folding (plus possibly inversion). */
- ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD)
- ) {
- for (value = 0; value < 256; ++value) {
- if (ANYOF_BITMAP_TEST(ret, value)) {
- UV fold = PL_fold[value];
-
- if (fold != value)
- ANYOF_BITMAP_SET(ret, fold);
- }
- }
- ANYOF_FLAGS(ret) &= ~ANYOF_FOLD;
- }
-
- /* optimize inverted simple patterns (e.g. [^a-z]) */
- if (optimize_invert &&
- /* If the only flag is inversion. */
- (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) {
- for (value = 0; value < ANYOF_BITMAP_SIZE; ++value)
- ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL;
- ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL;
- }
- {
- AV * const av = newAV();
- SV *rv;
- /* The 0th element stores the character class description
- * in its textual form: used later (regexec.c:Perl_regclass_swash())
- * to initialize the appropriate swash (which gets stored in
- * the 1st element), and also useful for dumping the regnode.
- * The 2nd element stores the multicharacter foldings,
- * used later (regexec.c:S_reginclass()). */
- av_store(av, 0, listsv);
- av_store(av, 1, NULL);
- av_store(av, 2, MUTABLE_SV(unicode_alternate));
- rv = newRV_noinc(MUTABLE_SV(av));
- n = add_data(pRExC_state, 1, "s");
- RExC_rxi->data->data[n] = (void*)rv;
- ARG_SET(ret, n);
- }
- return ret;
-}
-#undef _C_C_T_
-
-
-/* reg_skipcomment()
-
- Absorbs an /x style # comments from the input stream.
- Returns true if there is more text remaining in the stream.
- Will set the REG_SEEN_RUN_ON_COMMENT flag if the comment
- terminates the pattern without including a newline.
-
- Note its the callers responsibility to ensure that we are
- actually in /x mode
-
-*/
-
-STATIC bool
-S_reg_skipcomment(pTHX_ RExC_state_t *pRExC_state)
-{
- bool ended = 0;
-
- PERL_ARGS_ASSERT_REG_SKIPCOMMENT;
-
- while (RExC_parse < RExC_end)
- if (*RExC_parse++ == '\n') {
- ended = 1;
- break;
- }
- if (!ended) {
- /* we ran off the end of the pattern without ending
- the comment, so we have to add an \n when wrapping */
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- return 0;
- } else
- return 1;
-}
-
-/* nextchar()
-
- Advance that parse position, and optionall absorbs
- "whitespace" from the inputstream.
-
- Without /x "whitespace" means (?#...) style comments only,
- with /x this means (?#...) and # comments and whitespace proper.
-
- Returns the RExC_parse point from BEFORE the scan occurs.
-
- This is the /x friendly way of saying RExC_parse++.
-*/
-
-STATIC char*
-S_nextchar(pTHX_ RExC_state_t *pRExC_state)
-{
- char* const retval = RExC_parse++;
-
- PERL_ARGS_ASSERT_NEXTCHAR;
-
- for (;;) {
- if (*RExC_parse == '(' && RExC_parse[1] == '?' &&
- RExC_parse[2] == '#') {
- while (*RExC_parse != ')') {
- if (RExC_parse == RExC_end)
- FAIL("Sequence (?#... not terminated");
- RExC_parse++;
- }
- RExC_parse++;
- continue;
- }
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if (isSPACE(*RExC_parse)) {
- RExC_parse++;
- continue;
- }
- else if (*RExC_parse == '#') {
- if ( reg_skipcomment( pRExC_state ) )
- continue;
- }
- }
- return retval;
- }
-}
-
-/*
-- reg_node - emit a node
-*/
-STATIC regnode * /* Location. */
-S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 1;
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE(ptr, op);
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, (ptr) - 1);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s:%d: (op %s) %s %"UVuf" (len %"UVuf") (max %"UVuf").\n",
- "reg_node", __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(RExC_emit, RExC_parse + (op == END));
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reganode - emit a node with an argument
-*/
-STATIC regnode * /* Location. */
-S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGANODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 2;
- /*
- We can't do this:
-
- assert(2==regarglen[op]+1);
-
- Anything larger than this has to allocate the extra amount.
- If we changed this to be:
-
- RExC_size += (1 + regarglen[op]);
-
- then it wouldn't matter. Its not clear what side effect
- might come from that so its not done so far.
- -- dmq
- */
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE_ARG(ptr, op, arg);
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, (ptr) - 2);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reganode",
- __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] ?
- "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Cur_Node_Offset;
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reguni - emit (if appropriate) a Unicode character
-*/
-STATIC STRLEN
-S_reguni(pTHX_ const RExC_state_t *pRExC_state, UV uv, char* s)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGUNI;
-
- return SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s);
-}
-
-/*
-- reginsert - insert an operator in front of already-emitted operand
-*
-* Means relocating the operand.
-*/
-STATIC void
-S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd, U32 depth)
-{
- dVAR;
- register regnode *src;
- register regnode *dst;
- register regnode *place;
- const int offset = regarglen[(U8)op];
- const int size = NODE_STEP_REGNODE + offset;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGINSERT;
- PERL_UNUSED_ARG(depth);
-/* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */
- DEBUG_PARSE_FMT("inst"," - %s",PL_reg_name[op]);
- if (SIZE_ONLY) {
- RExC_size += size;
- return;
- }
-
- src = RExC_emit;
- RExC_emit += size;
- dst = RExC_emit;
- if (RExC_open_parens) {
- int paren;
- /*DEBUG_PARSE_FMT("inst"," - %"IVdf, (IV)RExC_npar);*/
- for ( paren=0 ; paren < RExC_npar ; paren++ ) {
- if ( RExC_open_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("open"," - %d",size);*/
- RExC_open_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("open"," - %s","ok");*/
- }
- if ( RExC_close_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("close"," - %d",size);*/
- RExC_close_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("close"," - %s","ok");*/
- }
- }
- }
-
- while (src > opnd) {
- StructCopy(--src, --dst, regnode);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD 20010112 */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s copy %"UVuf" -> %"UVuf" (max %"UVuf").\n",
- "reg_insert",
- __LINE__,
- PL_reg_name[op],
- (UV)(dst - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(src - RExC_emit_start),
- (UV)(dst - RExC_emit_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src));
- Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src));
- }
-#endif
- }
-
-
- place = opnd; /* Op node, where operand used to be. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reginsert",
- __LINE__,
- PL_reg_name[op],
- (UV)(place - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(place - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(place, RExC_parse);
- Set_Node_Length(place, 1);
- }
-#endif
- src = NEXTOPER(place);
- FILL_ADVANCE_NODE(place, op);
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, (place) - 1);
- Zero(src, offset, regnode);
-}
-
-/*
-- regtail - set the next-pointer at the end of a node chain of p to val.
-- SEE ALSO: regtail_study
-*/
-/* TODO: All three parms should be const */
-STATIC void
-S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- if (SIZE_ONLY)
- return;
-
- /* Find last node. */
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tail" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) %s %s\n",
- SvPV_nolen_const(mysv), REG_NODE_NUM(scan),
- (temp == NULL ? "->" : ""),
- (temp == NULL ? PL_reg_name[OP(val)] : "")
- );
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
-
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-}
-
-#ifdef DEBUGGING
-/*
-- regtail_study - set the next-pointer at the end of a node chain of p to val.
-- Look for optimizable sequences at the same time.
-- currently only looks for EXACT chains.
-
-This is expermental code. The idea is to use this routine to perform
-in place optimizations on branches and groups as they are constructed,
-with the long term intention of removing optimization from study_chunk so
-that it is purely analytical.
-
-Currently only used when in DEBUG mode. The macro REGTAIL_STUDY() is used
-to control which is which.
-
-*/
-/* TODO: All four parms should be const */
-
-STATIC U8
-S_regtail_study(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- U8 exact = PSEUDO;
-#ifdef EXPERIMENTAL_INPLACESCAN
- I32 min = 0;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL_STUDY;
-
-
- if (SIZE_ONLY)
- return exact;
-
- /* Find last node. */
-
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (PL_regkind[OP(scan)] == EXACT)
- if (join_exact(pRExC_state,scan,&min,1,val,depth+1))
- return EXACT;
-#endif
- if ( exact ) {
- switch (OP(scan)) {
- case EXACT:
- case EXACTF:
- case EXACTFL:
- if( exact == PSEUDO )
- exact= OP(scan);
- else if ( exact != OP(scan) )
- exact= 0;
- case NOTHING:
- break;
- default:
- exact= 0;
- }
- }
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tsdy" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) -> %s\n",
- SvPV_nolen_const(mysv),
- REG_NODE_NUM(scan),
- PL_reg_name[exact]);
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
- DEBUG_PARSE_r({
- SV * const mysv_val=sv_newmortal();
- DEBUG_PARSE_MSG("");
- regprop(RExC_rx, mysv_val, val);
- PerlIO_printf(Perl_debug_log, "~ attach to %s (%"IVdf") offset to %"IVdf"\n",
- SvPV_nolen_const(mysv_val),
- (IV)REG_NODE_NUM(val),
- (IV)(val - scan)
- );
- });
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-
- return exact;
-}
-#endif
-
-/*
- - regcurly - a little FSA that accepts {\d+,?\d*}
- */
-STATIC I32
-S_regcurly(register const char *s)
-{
- PERL_ARGS_ASSERT_REGCURLY;
-
- if (*s++ != '{')
- return FALSE;
- if (!isDIGIT(*s))
- return FALSE;
- while (isDIGIT(*s))
- s++;
- if (*s == ',')
- s++;
- while (isDIGIT(*s))
- s++;
- if (*s != '}')
- return FALSE;
- return TRUE;
-}
-
-
-/*
- - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form
- */
-#ifdef DEBUGGING
-static void
-S_regdump_extflags(pTHX_ const char *lead, const U32 flags)
-{
- int bit;
- int set=0;
-
- for (bit=0; bit<32; bit++) {
- if (flags & (1<<bit)) {
- if (!set++ && lead)
- PerlIO_printf(Perl_debug_log, "%s",lead);
- PerlIO_printf(Perl_debug_log, "%s ",PL_reg_extflags_name[bit]);
- }
- }
- if (lead) {
- if (set)
- PerlIO_printf(Perl_debug_log, "\n");
- else
- PerlIO_printf(Perl_debug_log, "%s[none-set]\n",lead);
- }
-}
-#endif
-
-void
-Perl_regdump(pTHX_ const regexp *r)
-{
-#ifdef DEBUGGING
- dVAR;
- SV * const sv = sv_newmortal();
- SV *dsv= sv_newmortal();
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGDUMP;
-
- (void)dumpuntil(r, ri->program, ri->program + 1, NULL, NULL, sv, 0, 0);
-
- /* Header fields of interest. */
- if (r->anchored_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->anchored_substr),
- RE_SV_DUMPLEN(r->anchored_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_substr),
- (IV)r->anchored_offset);
- } else if (r->anchored_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->anchored_utf8),
- RE_SV_DUMPLEN(r->anchored_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored utf8 %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_utf8),
- (IV)r->anchored_offset);
- }
- if (r->float_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->float_substr),
- RE_SV_DUMPLEN(r->float_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "floating %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_substr),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- } else if (r->float_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->float_utf8),
- RE_SV_DUMPLEN(r->float_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "floating utf8 %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_utf8),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- }
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log,
- (const char *)
- (r->check_substr == r->float_substr
- && r->check_utf8 == r->float_utf8
- ? "(checking floating" : "(checking anchored"));
- if (r->extflags & RXf_NOSCAN)
- PerlIO_printf(Perl_debug_log, " noscan");
- if (r->extflags & RXf_CHECK_ALL)
- PerlIO_printf(Perl_debug_log, " isall");
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log, ") ");
-
- if (ri->regstclass) {
- regprop(r, sv, ri->regstclass);
- PerlIO_printf(Perl_debug_log, "stclass %s ", SvPVX_const(sv));
- }
- if (r->extflags & RXf_ANCH) {
- PerlIO_printf(Perl_debug_log, "anchored");
- if (r->extflags & RXf_ANCH_BOL)
- PerlIO_printf(Perl_debug_log, "(BOL)");
- if (r->extflags & RXf_ANCH_MBOL)
- PerlIO_printf(Perl_debug_log, "(MBOL)");
- if (r->extflags & RXf_ANCH_SBOL)
- PerlIO_printf(Perl_debug_log, "(SBOL)");
- if (r->extflags & RXf_ANCH_GPOS)
- PerlIO_printf(Perl_debug_log, "(GPOS)");
- PerlIO_putc(Perl_debug_log, ' ');
- }
- if (r->extflags & RXf_GPOS_SEEN)
- PerlIO_printf(Perl_debug_log, "GPOS:%"UVuf" ", (UV)r->gofs);
- if (r->intflags & PREGf_SKIP)
- PerlIO_printf(Perl_debug_log, "plus ");
- if (r->intflags & PREGf_IMPLICIT)
- PerlIO_printf(Perl_debug_log, "implicit ");
- PerlIO_printf(Perl_debug_log, "minlen %"IVdf" ", (IV)r->minlen);
- if (r->extflags & RXf_EVAL_SEEN)
- PerlIO_printf(Perl_debug_log, "with eval ");
- PerlIO_printf(Perl_debug_log, "\n");
- DEBUG_FLAGS_r(regdump_extflags("r->extflags: ",r->extflags));
-#else
- PERL_ARGS_ASSERT_REGDUMP;
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(r);
-#endif /* DEBUGGING */
-}
-
-/*
-- regprop - printable representation of opcode
-*/
-#define EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags) \
-STMT_START { \
- if (do_sep) { \
- Perl_sv_catpvf(aTHX_ sv,"%s][%s",PL_colors[1],PL_colors[0]); \
- if (flags & ANYOF_INVERT) \
- /*make sure the invert info is in each */ \
- sv_catpvs(sv, "^"); \
- do_sep = 0; \
- } \
-} STMT_END
-
-void
-Perl_regprop(pTHX_ const regexp *prog, SV *sv, const regnode *o)
-{
-#ifdef DEBUGGING
- dVAR;
- register int k;
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPROP;
-
- sv_setpvs(sv, "");
-
- if (OP(o) > REGNODE_MAX) /* regnode.type is unsigned */
- /* It would be nice to FAIL() here, but this may be called from
- regexec.c, and it would be hard to supply pRExC_state. */
- Perl_croak(aTHX_ "Corrupted regexp opcode %d > %d", (int)OP(o), (int)REGNODE_MAX);
- sv_catpv(sv, PL_reg_name[OP(o)]); /* Take off const! */
-
- k = PL_regkind[OP(o)];
-
- if (k == EXACT) {
- sv_catpvs(sv, " ");
- /* Using is_utf8_string() (via PERL_PV_UNI_DETECT)
- * is a crude hack but it may be the best for now since
- * we have no flag "this EXACTish node was UTF-8"
- * --jhi */
- pv_pretty(sv, STRING(o), STR_LEN(o), 60, PL_colors[0], PL_colors[1],
- PERL_PV_ESCAPE_UNI_DETECT |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT |
- PERL_PV_PRETTY_NOCLEAR
- );
- } else if (k == TRIE) {
- /* print the details of the trie in dumpuntil instead, as
- * progi->data isn't available here */
- const char op = OP(o);
- const U32 n = ARG(o);
- const reg_ac_data * const ac = IS_TRIE_AC(op) ?
- (reg_ac_data *)progi->data->data[n] :
- NULL;
- const reg_trie_data * const trie
- = (reg_trie_data*)progi->data->data[!IS_TRIE_AC(op) ? n : ac->trie];
-
- Perl_sv_catpvf(aTHX_ sv, "-%s",PL_reg_name[o->flags]);
- DEBUG_TRIE_COMPILE_r(
- Perl_sv_catpvf(aTHX_ sv,
- "<S:%"UVuf"/%"IVdf" W:%"UVuf" L:%"UVuf"/%"UVuf" C:%"UVuf"/%"UVuf">",
- (UV)trie->startstate,
- (IV)trie->statecount-1, /* -1 because of the unused 0 element */
- (UV)trie->wordcount,
- (UV)trie->minlen,
- (UV)trie->maxlen,
- (UV)TRIE_CHARCOUNT(trie),
- (UV)trie->uniquecharcount
- )
- );
- if ( IS_ANYOF_TRIE(op) || trie->bitmap ) {
- int i;
- int rangestart = -1;
- U8* bitmap = IS_ANYOF_TRIE(op) ? (U8*)ANYOF_BITMAP(o) : (U8*)TRIE_BITMAP(trie);
- sv_catpvs(sv, "[");
- for (i = 0; i <= 256; i++) {
- if (i < 256 && BITMAP_TEST(bitmap,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- rangestart = -1;
- }
- }
- sv_catpvs(sv, "]");
- }
-
- } else if (k == CURLY) {
- if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */
- Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o));
- }
- else if (k == WHILEM && o->flags) /* Ordinal/of */
- Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4);
- else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP || OP(o)==ACCEPT) {
- Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */
- if ( RXp_PAREN_NAMES(prog) ) {
- if ( k != REF || OP(o) < NREF) {
- AV *list= MUTABLE_AV(progi->data->data[progi->name_list_idx]);
- SV **name= av_fetch(list, ARG(o), 0 );
- if (name)
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- else {
- AV *list= MUTABLE_AV(progi->data->data[ progi->name_list_idx ]);
- SV *sv_dat= MUTABLE_SV(progi->data->data[ ARG( o ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
- SV **name= av_fetch(list, nums[0], 0 );
- I32 n;
- if (name) {
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- Perl_sv_catpvf(aTHX_ sv, "%s%"IVdf,
- (n ? "," : ""), (IV)nums[n]);
- }
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- }
- }
- } else if (k == GOSUB)
- Perl_sv_catpvf(aTHX_ sv, "%d[%+d]", (int)ARG(o),(int)ARG2L(o)); /* Paren and offset */
- else if (k == VERB) {
- if (!o->flags)
- Perl_sv_catpvf(aTHX_ sv, ":%"SVf,
- SVfARG((MUTABLE_SV(progi->data->data[ ARG( o ) ]))));
- } else if (k == LOGICAL)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */
- else if (k == FOLDCHAR)
- Perl_sv_catpvf(aTHX_ sv, "[0x%"UVXf"]", PTR2UV(ARG(o)) );
- else if (k == ANYOF) {
- int i, rangestart = -1;
- const U8 flags = ANYOF_FLAGS(o);
- int do_sep = 0;
-
- /* Should be synchronized with * ANYOF_ #xdefines in regcomp.h */
- static const char * const anyofs[] = {
- "\\w",
- "\\W",
- "\\s",
- "\\S",
- "\\d",
- "\\D",
- "[:alnum:]",
- "[:^alnum:]",
- "[:alpha:]",
- "[:^alpha:]",
- "[:ascii:]",
- "[:^ascii:]",
- "[:cntrl:]",
- "[:^cntrl:]",
- "[:graph:]",
- "[:^graph:]",
- "[:lower:]",
- "[:^lower:]",
- "[:print:]",
- "[:^print:]",
- "[:punct:]",
- "[:^punct:]",
- "[:upper:]",
- "[:^upper:]",
- "[:xdigit:]",
- "[:^xdigit:]",
- "[:space:]",
- "[:^space:]",
- "[:blank:]",
- "[:^blank:]"
- };
-
- if (flags & ANYOF_LOCALE)
- sv_catpvs(sv, "{loc}");
- if (flags & ANYOF_FOLD)
- sv_catpvs(sv, "{i}");
- Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]);
- if (flags & ANYOF_INVERT)
- sv_catpvs(sv, "^");
-
- /* output what the standard cp 0-255 bitmap matches */
- for (i = 0; i <= 256; i++) {
- if (i < 256 && ANYOF_BITMAP_TEST(o,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- do_sep = 1;
- rangestart = -1;
- }
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
- /* output any special charclass tests (used mostly under use locale) */
- if (o->flags & ANYOF_CLASS)
- for (i = 0; i < (int)(sizeof(anyofs)/sizeof(char*)); i++)
- if (ANYOF_CLASS_TEST(o,i)) {
- sv_catpv(sv, anyofs[i]);
- do_sep = 1;
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
-
- /* output information about the unicode matching */
- if (flags & ANYOF_UNICODE)
- sv_catpvs(sv, "{unicode}");
- else if (flags & ANYOF_UNICODE_ALL)
- sv_catpvs(sv, "{unicode_all}");
-
- {
- SV *lv;
- SV * const sw = regclass_swash(prog, o, FALSE, &lv, 0);
-
- if (lv) {
- if (sw) {
- U8 s[UTF8_MAXBYTES_CASE+1];
-
- for (i = 0; i <= 256; i++) { /* just the first 256 */
- uvchr_to_utf8(s, i);
-
- if (i < 256 && swash_fetch(sw, s, TRUE)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++) {
- const U8 * const e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for(p = s; p < e; p++)
- put_byte(sv, *p);
- }
- else {
- const U8 *e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- sv_catpvs(sv, "-");
- e = uvchr_to_utf8(s, i-1);
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- }
- rangestart = -1;
- }
- }
-
- sv_catpvs(sv, "..."); /* et cetera */
- }
-
- {
- char *s = savesvpv(lv);
- char * const origs = s;
-
- while (*s && *s != '\n')
- s++;
-
- if (*s == '\n') {
- const char * const t = ++s;
-
- while (*s) {
- if (*s == '\n')
- *s = ' ';
- s++;
- }
- if (s[-1] == ' ')
- s[-1] = 0;
-
- sv_catpv(sv, t);
- }
-
- Safefree(origs);
- }
- }
- }
-
- Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]);
- }
- else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH))
- Perl_sv_catpvf(aTHX_ sv, "[%d]", -(o->flags));
-#else
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(sv);
- PERL_UNUSED_ARG(o);
- PERL_UNUSED_ARG(prog);
-#endif /* DEBUGGING */
-}
-
-SV *
-Perl_re_intuit_string(pTHX_ REGEXP * const r)
-{ /* Assume that RE_INTUIT is set */
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_STRING;
- PERL_UNUSED_CONTEXT;
-
- DEBUG_COMPILE_r(
- {
- const char * const s = SvPV_nolen_const(prog->check_substr
- ? prog->check_substr : prog->check_utf8);
-
- if (!PL_colorset) reginitcolors();
- PerlIO_printf(Perl_debug_log,
- "%sUsing REx %ssubstr:%s \"%s%.60s%s%s\"\n",
- PL_colors[4],
- prog->check_substr ? "" : "utf8 ",
- PL_colors[5],PL_colors[0],
- s,
- PL_colors[1],
- (strlen(s) > 60 ? "..." : ""));
- } );
-
- return prog->check_substr ? prog->check_substr : prog->check_utf8;
-}
-
-/*
- pregfree()
-
- handles refcounting and freeing the perl core regexp structure. When
- it is necessary to actually free the structure the first thing it
- does is call the 'free' method of the regexp_engine associated to to
- the regexp, allowing the handling of the void *pprivate; member
- first. (This routine is not overridable by extensions, which is why
- the extensions free is called first.)
-
- See regdupe and regdupe_internal if you change anything here.
-*/
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_pregfree(pTHX_ REGEXP *r)
-{
- SvREFCNT_dec(r);
-}
-
-void
-Perl_pregfree2(pTHX_ REGEXP *rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_PREGFREE2;
-
- if (r->mother_re) {
- ReREFCNT_dec(r->mother_re);
- } else {
- CALLREGFREE_PVT(rx); /* free the private data */
- if (RXp_PAREN_NAMES(r))
- SvREFCNT_dec(RXp_PAREN_NAMES(r));
- }
- if (r->substrs) {
- if (r->anchored_substr)
- SvREFCNT_dec(r->anchored_substr);
- if (r->anchored_utf8)
- SvREFCNT_dec(r->anchored_utf8);
- if (r->float_substr)
- SvREFCNT_dec(r->float_substr);
- if (r->float_utf8)
- SvREFCNT_dec(r->float_utf8);
- Safefree(r->substrs);
- }
- RX_MATCH_COPY_FREE(rx);
-#ifdef PERL_OLD_COPY_ON_WRITE
- if (r->saved_copy)
- SvREFCNT_dec(r->saved_copy);
-#endif
- Safefree(r->offs);
-}
-
-/* reg_temp_copy()
-
- This is a hacky workaround to the structural issue of match results
- being stored in the regexp structure which is in turn stored in
- PL_curpm/PL_reg_curpm. The problem is that due to qr// the pattern
- could be PL_curpm in multiple contexts, and could require multiple
- result sets being associated with the pattern simultaneously, such
- as when doing a recursive match with (??{$qr})
-
- The solution is to make a lightweight copy of the regexp structure
- when a qr// is returned from the code executed by (??{$qr}) this
- lightweight copy doesnt actually own any of its data except for
- the starp/end and the actual regexp structure itself.
-
-*/
-
-
-REGEXP *
-Perl_reg_temp_copy (pTHX_ REGEXP *rx)
-{
- REGEXP *ret_x = (REGEXP*) newSV_type(SVt_REGEXP);
- struct regexp *ret = (struct regexp *)SvANY(ret_x);
- struct regexp *const r = (struct regexp *)SvANY(rx);
- register const I32 npar = r->nparens+1;
-
- PERL_ARGS_ASSERT_REG_TEMP_COPY;
-
- (void)ReREFCNT_inc(rx);
- /* We can take advantage of the existing "copied buffer" mechanism in SVs
- by pointing directly at the buffer, but flagging that the allocated
- space in the copy is zero. As we've just done a struct copy, it's now
- a case of zero-ing that, rather than copying the current length. */
- SvPV_set(ret_x, RX_WRAPPED(rx));
- SvFLAGS(ret_x) |= SvFLAGS(rx) & (SVf_POK|SVp_POK|SVf_UTF8);
- memcpy(&(ret->xpv_cur), &(r->xpv_cur),
- sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur));
- SvLEN_set(ret_x, 0);
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if (r->substrs) {
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- SvREFCNT_inc_void(ret->anchored_substr);
- SvREFCNT_inc_void(ret->anchored_utf8);
- SvREFCNT_inc_void(ret->float_substr);
- SvREFCNT_inc_void(ret->float_utf8);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
- }
- RX_MATCH_COPIED_off(ret_x);
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
- ret->mother_re = rx;
-
- return ret_x;
-}
-#endif
-
-/* regfree_internal()
-
- Free the private data in a regexp. This is overloadable by
- extensions. Perl takes care of the regexp structure in pregfree(),
- this covers the *pprivate pointer which technically perldoesnt
- know about, however of course we have to handle the
- regexp_internal structure when no extension is in use.
-
- Note this is called before freeing anything in the regexp
- structure.
- */
-
-void
-Perl_regfree_internal(pTHX_ REGEXP * const rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGFREE_INTERNAL;
-
- DEBUG_COMPILE_r({
- if (!PL_colorset)
- reginitcolors();
- {
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RX_UTF8(rx),
- dsv, RX_PRECOMP(rx), RX_PRELEN(rx), 60);
- PerlIO_printf(Perl_debug_log,"%sFreeing REx:%s %s\n",
- PL_colors[4],PL_colors[5],s);
- }
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets)
- Safefree(ri->u.offsets); /* 20010421 MJD */
-#endif
- if (ri->data) {
- int n = ri->data->count;
- PAD* new_comppad = NULL;
- PAD* old_comppad;
- PADOFFSET refcnt;
-
- while (--n >= 0) {
- /* If you add a ->what type here, update the comment in regcomp.h */
- switch (ri->data->what[n]) {
- case 's':
- case 'S':
- case 'u':
- SvREFCNT_dec(MUTABLE_SV(ri->data->data[n]));
- break;
- case 'f':
- Safefree(ri->data->data[n]);
- break;
- case 'p':
- new_comppad = MUTABLE_AV(ri->data->data[n]);
- break;
- case 'o':
- if (new_comppad == NULL)
- Perl_croak(aTHX_ "panic: pregfree comppad");
- PAD_SAVE_LOCAL(old_comppad,
- /* Watch out for global destruction's random ordering. */
- (SvTYPE(new_comppad) == SVt_PVAV) ? new_comppad : NULL
- );
- OP_REFCNT_LOCK;
- refcnt = OpREFCNT_dec((OP_4tree*)ri->data->data[n]);
- OP_REFCNT_UNLOCK;
- if (!refcnt)
- op_free((OP_4tree*)ri->data->data[n]);
-
- PAD_RESTORE_LOCAL(old_comppad);
- SvREFCNT_dec(MUTABLE_SV(new_comppad));
- new_comppad = NULL;
- break;
- case 'n':
- break;
- case 'T':
- { /* Aho Corasick add-on structure for a trie node.
- Used in stclass optimization only */
- U32 refcount;
- reg_ac_data *aho=(reg_ac_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --aho->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(aho->states);
- PerlMemShared_free(aho->fail);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- PerlMemShared_free(ri->regstclass);
- }
- }
- break;
- case 't':
- {
- /* trie structure. */
- U32 refcount;
- reg_trie_data *trie=(reg_trie_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --trie->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(trie->charmap);
- PerlMemShared_free(trie->states);
- PerlMemShared_free(trie->trans);
- if (trie->bitmap)
- PerlMemShared_free(trie->bitmap);
- if (trie->wordlen)
- PerlMemShared_free(trie->wordlen);
- if (trie->jump)
- PerlMemShared_free(trie->jump);
- if (trie->nextword)
- PerlMemShared_free(trie->nextword);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- }
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: regfree data code '%c'", ri->data->what[n]);
- }
- }
- Safefree(ri->data->what);
- Safefree(ri->data);
- }
-
- Safefree(ri);
-}
-
-#define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
-#define av_dup_inc(s,t) MUTABLE_AV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define hv_dup_inc(s,t) MUTABLE_HV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define SAVEPVN(p,n) ((p) ? savepvn(p,n) : NULL)
-
-/*
- re_dup - duplicate a regexp.
-
- This routine is expected to clone a given regexp structure. It is only
- compiled under USE_ITHREADS.
-
- After all of the core data stored in struct regexp is duplicated
- the regexp_engine.dupe method is used to copy any private data
- stored in the *pprivate pointer. This allows extensions to handle
- any duplication it needs to do.
-
- See pregfree() and regfree_internal() if you change anything here.
-*/
-#if defined(USE_ITHREADS)
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_re_dup_guts(pTHX_ const REGEXP *sstr, REGEXP *dstr, CLONE_PARAMS *param)
-{
- dVAR;
- I32 npar;
- const struct regexp *r = (const struct regexp *)SvANY(sstr);
- struct regexp *ret = (struct regexp *)SvANY(dstr);
-
- PERL_ARGS_ASSERT_RE_DUP_GUTS;
-
- npar = r->nparens+1;
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if(ret->swap) {
- /* no need to copy these */
- Newx(ret->swap, npar, regexp_paren_pair);
- }
-
- if (ret->substrs) {
- /* Do it this way to avoid reading from *r after the StructCopy().
- That way, if any of the sv_dup_inc()s dislodge *r from the L1
- cache, it doesn't matter. */
- const bool anchored = r->check_substr
- ? r->check_substr == r->anchored_substr
- : r->check_utf8 == r->anchored_utf8;
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- ret->anchored_substr = sv_dup_inc(ret->anchored_substr, param);
- ret->anchored_utf8 = sv_dup_inc(ret->anchored_utf8, param);
- ret->float_substr = sv_dup_inc(ret->float_substr, param);
- ret->float_utf8 = sv_dup_inc(ret->float_utf8, param);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
-
- if (ret->check_substr) {
- if (anchored) {
- assert(r->check_utf8 == r->anchored_utf8);
- ret->check_substr = ret->anchored_substr;
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- assert(r->check_substr == r->float_substr);
- assert(r->check_utf8 == r->float_utf8);
- ret->check_substr = ret->float_substr;
- ret->check_utf8 = ret->float_utf8;
- }
- } else if (ret->check_utf8) {
- if (anchored) {
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- ret->check_utf8 = ret->float_utf8;
- }
- }
- }
-
- RXp_PAREN_NAMES(ret) = hv_dup_inc(RXp_PAREN_NAMES(ret), param);
-
- if (ret->pprivate)
- RXi_SET(ret,CALLREGDUPE_PVT(dstr,param));
-
- if (RX_MATCH_COPIED(dstr))
- ret->subbeg = SAVEPVN(ret->subbeg, ret->sublen);
- else
- ret->subbeg = NULL;
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
-
- ret->mother_re = NULL;
- ret->gofs = 0;
-}
-#endif /* PERL_IN_XSUB_RE */
-
-/*
- regdupe_internal()
-
- This is the internal complement to regdupe() which is used to copy
- the structure pointed to by the *pprivate pointer in the regexp.
- This is the core version of the extension overridable cloning hook.
- The regexp structure being duplicated will be copied by perl prior
- to this and will be provided as the regexp *r argument, however
- with the /old/ structures pprivate pointer value. Thus this routine
- may override any copying normally done by perl.
-
- It returns a pointer to the new regexp_internal structure.
-*/
-
-void *
-Perl_regdupe_internal(pTHX_ REGEXP * const rx, CLONE_PARAMS *param)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- regexp_internal *reti;
- int len, npar;
- RXi_GET_DECL(r,ri);
-
- PERL_ARGS_ASSERT_REGDUPE_INTERNAL;
-
- npar = r->nparens+1;
- len = ProgLen(ri);
-
- Newxc(reti, sizeof(regexp_internal) + len*sizeof(regnode), char, regexp_internal);
- Copy(ri->program, reti->program, len+1, regnode);
-
-
- reti->regstclass = NULL;
-
- if (ri->data) {
- struct reg_data *d;
- const int count = ri->data->count;
- int i;
-
- Newxc(d, sizeof(struct reg_data) + count*sizeof(void *),
- char, struct reg_data);
- Newx(d->what, count, U8);
-
- d->count = count;
- for (i = 0; i < count; i++) {
- d->what[i] = ri->data->what[i];
- switch (d->what[i]) {
- /* legal options are one of: sSfpontTu
- see also regcomp.h and pregfree() */
- case 's':
- case 'S':
- case 'p': /* actually an AV, but the dup function is identical. */
- case 'u': /* actually an HV, but the dup function is identical. */
- d->data[i] = sv_dup_inc((const SV *)ri->data->data[i], param);
- break;
- case 'f':
- /* This is cheating. */
- Newx(d->data[i], 1, struct regnode_charclass_class);
- StructCopy(ri->data->data[i], d->data[i],
- struct regnode_charclass_class);
- reti->regstclass = (regnode*)d->data[i];
- break;
- case 'o':
- /* Compiled op trees are readonly and in shared memory,
- and can thus be shared without duplication. */
- OP_REFCNT_LOCK;
- d->data[i] = (void*)OpREFCNT_inc((OP*)ri->data->data[i]);
- OP_REFCNT_UNLOCK;
- break;
- case 'T':
- /* Trie stclasses are readonly and can thus be shared
- * without duplication. We free the stclass in pregfree
- * when the corresponding reg_ac_data struct is freed.
- */
- reti->regstclass= ri->regstclass;
- /* Fall through */
- case 't':
- OP_REFCNT_LOCK;
- ((reg_trie_data*)ri->data->data[i])->refcount++;
- OP_REFCNT_UNLOCK;
- /* Fall through */
- case 'n':
- d->data[i] = ri->data->data[i];
- break;
- default:
- Perl_croak(aTHX_ "panic: re_dup unknown data code '%c'", ri->data->what[i]);
- }
- }
-
- reti->data = d;
- }
- else
- reti->data = NULL;
-
- reti->name_list_idx = ri->name_list_idx;
-
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets) {
- Newx(reti->u.offsets, 2*len+1, U32);
- Copy(ri->u.offsets, reti->u.offsets, 2*len+1, U32);
- }
-#else
- SetProgLen(reti,len);
-#endif
-
- return (void*)reti;
-}
-
-#endif /* USE_ITHREADS */
-
-#ifndef PERL_IN_XSUB_RE
-
-/*
- - regnext - dig the "next" pointer out of a node
- */
-regnode *
-Perl_regnext(pTHX_ register regnode *p)
-{
- dVAR;
- register I32 offset;
-
- if (!p)
- return(NULL);
-
- offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p));
- if (offset == 0)
- return(NULL);
-
- return(p+offset);
-}
-#endif
-
-STATIC void
-S_re_croak2(pTHX_ const char* pat1,const char* pat2,...)
-{
- va_list args;
- STRLEN l1 = strlen(pat1);
- STRLEN l2 = strlen(pat2);
- char buf[512];
- SV *msv;
- const char *message;
-
- PERL_ARGS_ASSERT_RE_CROAK2;
-
- if (l1 > 510)
- l1 = 510;
- if (l1 + l2 > 510)
- l2 = 510 - l1;
- Copy(pat1, buf, l1 , char);
- Copy(pat2, buf + l1, l2 , char);
- buf[l1 + l2] = '\n';
- buf[l1 + l2 + 1] = '\0';
-#ifdef I_STDARG
- /* ANSI variant takes additional second argument */
- va_start(args, pat2);
-#else
- va_start(args);
-#endif
- msv = vmess(buf, &args);
- va_end(args);
- message = SvPV_const(msv,l1);
- if (l1 > 512)
- l1 = 512;
- Copy(message, buf, l1 , char);
- buf[l1-1] = '\0'; /* Overwrite \n */
- Perl_croak(aTHX_ "%s", buf);
-}
-
-/* XXX Here's a total kludge. But we need to re-enter for swash routines. */
-
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_save_re_context(pTHX)
-{
- dVAR;
-
- struct re_save_state *state;
-
- SAVEVPTR(PL_curcop);
- SSGROW(SAVESTACK_ALLOC_FOR_RE_SAVE_STATE + 1);
-
- state = (struct re_save_state *)(PL_savestack + PL_savestack_ix);
- PL_savestack_ix += SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
- SSPUSHINT(SAVEt_RE_STATE);
-
- Copy(&PL_reg_state, state, 1, struct re_save_state);
-
- PL_reg_start_tmp = 0;
- PL_reg_start_tmpl = 0;
- PL_reg_oldsaved = NULL;
- PL_reg_oldsavedlen = 0;
- PL_reg_maxiter = 0;
- PL_reg_leftiter = 0;
- PL_reg_poscache = NULL;
- PL_reg_poscache_size = 0;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = NULL;
-#endif
-
- /* Save $1..$n (#18107: UTF-8 s/(\w+)/uc($1)/e); AMS 20021106. */
- if (PL_curpm) {
- const REGEXP * const rx = PM_GETRE(PL_curpm);
- if (rx) {
- U32 i;
- for (i = 1; i <= RX_NPARENS(rx); i++) {
- char digits[TYPE_CHARS(long)];
- const STRLEN len = my_snprintf(digits, sizeof(digits), "%lu", (long)i);
- GV *const *const gvp
- = (GV**)hv_fetch(PL_defstash, digits, len, 0);
-
- if (gvp) {
- GV * const gv = *gvp;
- if (SvTYPE(gv) == SVt_PVGV && GvSV(gv))
- save_scalar(gv);
- }
- }
- }
- }
-}
-#endif
-
-static void
-clear_re(pTHX_ void *r)
-{
- dVAR;
- ReREFCNT_dec((REGEXP *)r);
-}
-
-#ifdef DEBUGGING
-
-STATIC void
-S_put_byte(pTHX_ SV *sv, int c)
-{
- PERL_ARGS_ASSERT_PUT_BYTE;
-
- /* Our definition of isPRINT() ignores locales, so only bytes that are
- not part of UTF-8 are considered printable. I assume that the same
- holds for UTF-EBCDIC.
- Also, code point 255 is not printable in either (it's E0 in EBCDIC,
- which Wikipedia says:
-
- EO, or Eight Ones, is an 8-bit EBCDIC character code represented as all
- ones (binary 1111 1111, hexadecimal FF). It is similar, but not
- identical, to the ASCII delete (DEL) or rubout control character.
- ) So the old condition can be simplified to !isPRINT(c) */
- if (!isPRINT(c))
- Perl_sv_catpvf(aTHX_ sv, "\\%o", c);
- else {
- const char string = c;
- if (c == '-' || c == ']' || c == '\\' || c == '^')
- sv_catpvs(sv, "\\");
- sv_catpvn(sv, &string, 1);
- }
-}
-
-
-#define CLEAR_OPTSTART \
- if (optstart) STMT_START { \
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log, " (%"IVdf" nodes)\n", (IV)(node - optstart))); \
- optstart=NULL; \
- } STMT_END
-
-#define DUMPUNTIL(b,e) CLEAR_OPTSTART; node=dumpuntil(r,start,(b),(e),last,sv,indent+1,depth+1);
-
-STATIC const regnode *
-S_dumpuntil(pTHX_ const regexp *r, const regnode *start, const regnode *node,
- const regnode *last, const regnode *plast,
- SV* sv, I32 indent, U32 depth)
-{
- dVAR;
- register U8 op = PSEUDO; /* Arbitrary non-END op. */
- register const regnode *next;
- const regnode *optstart= NULL;
-
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMPUNTIL;
-
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d : %d - %d - %d\n",indent,node-start,
- last ? last-start : 0,plast ? plast-start : 0);
-#endif
-
- if (plast && plast < last)
- last= plast;
-
- while (PL_regkind[op] != END && (!last || node < last)) {
- /* While that wasn't END last time... */
- NODE_ALIGN(node);
- op = OP(node);
- if (op == CLOSE || op == WHILEM)
- indent--;
- next = regnext((regnode *)node);
-
- /* Where, what. */
- if (OP(node) == OPTIMIZED) {
- if (!optstart && RE_DEBUG_FLAG(RE_DEBUG_COMPILE_OPTIMISE))
- optstart = node;
- else
- goto after_print;
- } else
- CLEAR_OPTSTART;
-
- regprop(r, sv, node);
- PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start),
- (int)(2*indent + 1), "", SvPVX_const(sv));
-
- if (OP(node) != OPTIMIZED) {
- if (next == NULL) /* Next ptr. */
- PerlIO_printf(Perl_debug_log, " (0)");
- else if (PL_regkind[(U8)op] == BRANCH && PL_regkind[OP(next)] != BRANCH )
- PerlIO_printf(Perl_debug_log, " (FAIL)");
- else
- PerlIO_printf(Perl_debug_log, " (%"IVdf")", (IV)(next - start));
- (void)PerlIO_putc(Perl_debug_log, '\n');
- }
-
- after_print:
- if (PL_regkind[(U8)op] == BRANCHJ) {
- assert(next);
- {
- register const regnode *nnode = (OP(next) == LONGJMP
- ? regnext((regnode *)next)
- : next);
- if (last && nnode > last)
- nnode = last;
- DUMPUNTIL(NEXTOPER(NEXTOPER(node)), nnode);
- }
- }
- else if (PL_regkind[(U8)op] == BRANCH) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node), next);
- }
- else if ( PL_regkind[(U8)op] == TRIE ) {
- const regnode *this_trie = node;
- const char op = OP(node);
- const U32 n = ARG(node);
- const reg_ac_data * const ac = op>=AHOCORASICK ?
- (reg_ac_data *)ri->data->data[n] :
- NULL;
- const reg_trie_data * const trie =
- (reg_trie_data*)ri->data->data[op<AHOCORASICK ? n : ac->trie];
-#ifdef DEBUGGING
- AV *const trie_words = MUTABLE_AV(ri->data->data[n + TRIE_WORDS_OFFSET]);
-#endif
- const regnode *nextbranch= NULL;
- I32 word_idx;
- sv_setpvs(sv, "");
- for (word_idx= 0; word_idx < (I32)trie->wordcount; word_idx++) {
- SV ** const elem_ptr = av_fetch(trie_words,word_idx,0);
-
- PerlIO_printf(Perl_debug_log, "%*s%s ",
- (int)(2*(indent+3)), "",
- elem_ptr ? pv_pretty(sv, SvPV_nolen_const(*elem_ptr), SvCUR(*elem_ptr), 60,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*elem_ptr) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT
- )
- : "???"
- );
- if (trie->jump) {
- U16 dist= trie->jump[word_idx+1];
- PerlIO_printf(Perl_debug_log, "(%"UVuf")\n",
- (UV)((dist ? this_trie + dist : next) - start));
- if (dist) {
- if (!nextbranch)
- nextbranch= this_trie + trie->jump[0];
- DUMPUNTIL(this_trie + dist, nextbranch);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode *)nextbranch);
- } else {
- PerlIO_printf(Perl_debug_log, "\n");
- }
- }
- if (last && next > last)
- node= last;
- else
- node= next;
- }
- else if ( op == CURLY ) { /* "next" might be very big: optimizer */
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS,
- NEXTOPER(node) + EXTRA_STEP_2ARGS + 1);
- }
- else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, next);
- }
- else if ( op == PLUS || op == STAR) {
- DUMPUNTIL(NEXTOPER(node), NEXTOPER(node) + 1);
- }
- else if (op == ANYOF) {
- /* arglen 1 + class block */
- node += 1 + ((ANYOF_FLAGS(node) & ANYOF_LARGE)
- ? ANYOF_CLASS_SKIP : ANYOF_SKIP);
- node = NEXTOPER(node);
- }
- else if (PL_regkind[(U8)op] == EXACT) {
- /* Literal string, where present. */
- node += NODE_SZ_STR(node) - 1;
- node = NEXTOPER(node);
- }
- else {
- node = NEXTOPER(node);
- node += regarglen[(U8)op];
- }
- if (op == CURLYX || op == OPEN)
- indent++;
- }
- CLEAR_OPTSTART;
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d\n", (int)indent);
-#endif
- return node;
-}
-
-#endif /* DEBUGGING */
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regexec.c
- */
-
-/*
- * One Ring to rule them all, One Ring to find them
- &
- * [p.v of _The Lord of the Rings_, opening poem]
- * [p.50 of _The Lord of the Rings_, I/iii: "The Shadow of the Past"]
- * [p.254 of _The Lord of the Rings_, II/ii: "The Council of Elrond"]
- */
-
-/* This file contains functions for executing a regular expression. See
- * also regcomp.c which funnily enough, contains functions for compiling
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_exec.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGEXEC_C
-#include "perl.h"
-#include "re_defs.h"
-
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#define RF_tainted 1 /* tainted information used? */
-#define RF_warned 2 /* warned about big count? */
-
-#define RF_utf8 8 /* Pattern contains multibyte chars? */
-
-#define UTF ((PL_reg_flags & RF_utf8) != 0)
-
-#define RS_init 1 /* eval environment created */
-#define RS_set 2 /* replsv value is set */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-#define REGINCLASS(prog,p,c) (ANYOF_FLAGS(p) ? reginclass(prog,p,c,0,0) : ANYOF_BITMAP_TEST(p,*(c)))
-
-/*
- * Forwards.
- */
-
-#define CHR_SVLEN(sv) (do_utf8 ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (PL_reg_match_utf8 ? utf8_distance(a,b) : a - b)
-
-#define HOPc(pos,off) \
- (char *)(PL_reg_match_utf8 \
- ? reghop3((U8*)pos, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)) \
- : (U8*)(pos + off))
-#define HOPBACKc(pos, off) \
- (char*)(PL_reg_match_utf8\
- ? reghopmaybe3((U8*)pos, -off, (U8*)PL_bostr) \
- : (pos - off >= PL_bostr) \
- ? (U8*)pos - off \
- : NULL)
-
-#define HOP3(pos,off,lim) (PL_reg_match_utf8 ? reghop3((U8*)(pos), off, (U8*)(lim)) : (U8*)(pos + off))
-#define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim))
-
-#define LOAD_UTF8_CHARCLASS(class,str) STMT_START { \
- if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)str); assert(ok); LEAVE; } } STMT_END
-#define LOAD_UTF8_CHARCLASS_ALNUM() LOAD_UTF8_CHARCLASS(alnum,"a")
-#define LOAD_UTF8_CHARCLASS_DIGIT() LOAD_UTF8_CHARCLASS(digit,"0")
-#define LOAD_UTF8_CHARCLASS_SPACE() LOAD_UTF8_CHARCLASS(space," ")
-#define LOAD_UTF8_CHARCLASS_MARK() LOAD_UTF8_CHARCLASS(mark, "\xcd\x86")
-
-/* TODO: Combine JUMPABLE and HAS_TEXT to cache OP(rn) */
-
-/* for use after a quantifier and before an EXACT-like node -- japhy */
-/* it would be nice to rework regcomp.sym to generate this stuff. sigh */
-#define JUMPABLE(rn) ( \
- OP(rn) == OPEN || \
- (OP(rn) == CLOSE && (!cur_eval || cur_eval->u.eval.close_paren != ARG(rn))) || \
- OP(rn) == EVAL || \
- OP(rn) == SUSPEND || OP(rn) == IFMATCH || \
- OP(rn) == PLUS || OP(rn) == MINMOD || \
- OP(rn) == KEEPS || (PL_regkind[OP(rn)] == VERB) || \
- (PL_regkind[OP(rn)] == CURLY && ARG1(rn) > 0) \
-)
-#define IS_EXACT(rn) (PL_regkind[OP(rn)] == EXACT)
-
-#define HAS_TEXT(rn) ( IS_EXACT(rn) || PL_regkind[OP(rn)] == REF )
-
-#if 0
-/* Currently these are only used when PL_regkind[OP(rn)] == EXACT so
- we don't need this definition. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT || OP(rn)==REF || OP(rn)==NREF )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF || OP(rn)==REFF || OP(rn)==NREFF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL || OP(rn)==REFFL || OP(rn)==NREFFL )
-
-#else
-/* ... so we use this as its faster. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL )
-
-#endif
-
-/*
- Search for mandatory following text node; for lookahead, the text must
- follow but for lookbehind (rn->flags != 0) we skip to the next step.
-*/
-#define FIND_NEXT_IMPT(rn) STMT_START { \
- while (JUMPABLE(rn)) { \
- const OPCODE type = OP(rn); \
- if (type == SUSPEND || PL_regkind[type] == CURLY) \
- rn = NEXTOPER(NEXTOPER(rn)); \
- else if (type == PLUS) \
- rn = NEXTOPER(rn); \
- else if (type == IFMATCH) \
- rn = (rn->flags == 0) ? NEXTOPER(NEXTOPER(rn)) : rn + ARG(rn); \
- else rn += NEXT_OFF(rn); \
- } \
-} STMT_END
-
-
-static void restore_pos(pTHX_ void *arg);
-
-STATIC CHECKPOINT
-S_regcppush(pTHX_ I32 parenfloor)
-{
- dVAR;
- const int retval = PL_savestack_ix;
-#define REGCP_PAREN_ELEMS 4
- const int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS;
- int p;
- GET_RE_DEBUG_FLAGS_DECL;
-
- if (paren_elems_to_push < 0)
- Perl_croak(aTHX_ "panic: paren_elems_to_push < 0");
-
-#define REGCP_OTHER_ELEMS 7
- SSGROW(paren_elems_to_push + REGCP_OTHER_ELEMS);
-
- for (p = PL_regsize; p > parenfloor; p--) {
-/* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */
- SSPUSHINT(PL_regoffs[p].end);
- SSPUSHINT(PL_regoffs[p].start);
- SSPUSHPTR(PL_reg_start_tmp[p]);
- SSPUSHINT(p);
- DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log,
- " saving \\%"UVuf" %"IVdf"(%"IVdf")..%"IVdf"\n",
- (UV)p, (IV)PL_regoffs[p].start,
- (IV)(PL_reg_start_tmp[p] - PL_bostr),
- (IV)PL_regoffs[p].end
- ));
- }
-/* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */
- SSPUSHPTR(PL_regoffs);
- SSPUSHINT(PL_regsize);
- SSPUSHINT(*PL_reglastparen);
- SSPUSHINT(*PL_reglastcloseparen);
- SSPUSHPTR(PL_reginput);
-#define REGCP_FRAME_ELEMS 2
-/* REGCP_FRAME_ELEMS are part of the REGCP_OTHER_ELEMS and
- * are needed for the regexp context stack bookkeeping. */
- SSPUSHINT(paren_elems_to_push + REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- SSPUSHINT(SAVEt_REGCONTEXT); /* Magic cookie. */
-
- return retval;
-}
-
-/* These are needed since we do not localize EVAL nodes: */
-#define REGCP_SET(cp) \
- DEBUG_STATE_r( \
- PerlIO_printf(Perl_debug_log, \
- " Setting an EVAL scope, savestack=%"IVdf"\n", \
- (IV)PL_savestack_ix)); \
- cp = PL_savestack_ix
-
-#define REGCP_UNWIND(cp) \
- DEBUG_STATE_r( \
- if (cp != PL_savestack_ix) \
- PerlIO_printf(Perl_debug_log, \
- " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \
- (IV)(cp), (IV)PL_savestack_ix)); \
- regcpblow(cp)
-
-STATIC char *
-S_regcppop(pTHX_ const regexp *rex)
-{
- dVAR;
- U32 i;
- char *input;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCPPOP;
-
- /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */
- i = SSPOPINT;
- assert(i == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */
- i = SSPOPINT; /* Parentheses elements to pop. */
- input = (char *) SSPOPPTR;
- *PL_reglastcloseparen = SSPOPINT;
- *PL_reglastparen = SSPOPINT;
- PL_regsize = SSPOPINT;
- PL_regoffs=(regexp_paren_pair *) SSPOPPTR;
-
-
- /* Now restore the parentheses context. */
- for (i -= (REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- i > 0; i -= REGCP_PAREN_ELEMS) {
- I32 tmps;
- U32 paren = (U32)SSPOPINT;
- PL_reg_start_tmp[paren] = (char *) SSPOPPTR;
- PL_regoffs[paren].start = SSPOPINT;
- tmps = SSPOPINT;
- if (paren <= *PL_reglastparen)
- PL_regoffs[paren].end = tmps;
- DEBUG_BUFFERS_r(
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n",
- (UV)paren, (IV)PL_regoffs[paren].start,
- (IV)(PL_reg_start_tmp[paren] - PL_bostr),
- (IV)PL_regoffs[paren].end,
- (paren > *PL_reglastparen ? "(no)" : ""));
- );
- }
- DEBUG_BUFFERS_r(
- if (*PL_reglastparen + 1 <= rex->nparens) {
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"IVdf"..\\%"IVdf" to undef\n",
- (IV)(*PL_reglastparen + 1), (IV)rex->nparens);
- }
- );
-#if 1
- /* It would seem that the similar code in regtry()
- * already takes care of this, and in fact it is in
- * a better location to since this code can #if 0-ed out
- * but the code in regtry() is needed or otherwise tests
- * requiring null fields (pat.t#187 and split.t#{13,14}
- * (as of patchlevel 7877) will fail. Then again,
- * this code seems to be necessary or otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * --jhi updated by dapm */
- for (i = *PL_reglastparen + 1; i <= rex->nparens; i++) {
- if (i > PL_regsize)
- PL_regoffs[i].start = -1;
- PL_regoffs[i].end = -1;
- }
-#endif
- return input;
-}
-
-#define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */
-
-/*
- * pregexec and friends
- */
-
-#ifndef PERL_IN_XSUB_RE
-/*
- - pregexec - match a regexp against a string
- */
-I32
-Perl_pregexec(pTHX_ REGEXP * const prog, char* stringarg, register char *strend,
- char *strbeg, I32 minend, SV *screamer, U32 nosave)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* nosave: For optimizations. */
-{
- PERL_ARGS_ASSERT_PREGEXEC;
-
- return
- regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL,
- nosave ? 0 : REXEC_COPY_STR);
-}
-#endif
-
-/*
- * Need to implement the following flags for reg_anch:
- *
- * USE_INTUIT_NOML - Useful to call re_intuit_start() first
- * USE_INTUIT_ML
- * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer
- * INTUIT_AUTORITATIVE_ML
- * INTUIT_ONCE_NOML - Intuit can match in one location only.
- * INTUIT_ONCE_ML
- *
- * Another flag for this function: SECOND_TIME (so that float substrs
- * with giant delta may be not rechecked).
- */
-
-/* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */
-
-/* If SCREAM, then SvPVX_const(sv) should be compatible with strpos and strend.
- Otherwise, only SvCUR(sv) is used to get strbeg. */
-
-/* XXXX We assume that strpos is strbeg unless sv. */
-
-/* XXXX Some places assume that there is a fixed substring.
- An update may be needed if optimizer marks as "INTUITable"
- RExen without fixed substrings. Similarly, it is assumed that
- lengths of all the strings are no more than minlen, thus they
- cannot come from lookahead.
- (Or minlen should take into account lookahead.)
- NOTE: Some of this comment is not correct. minlen does now take account
- of lookahead/behind. Further research is required. -- demerphq
-
-*/
-
-/* A failure to find a constant substring means that there is no need to make
- an expensive call to REx engine, thus we celebrate a failure. Similarly,
- finding a substring too deep into the string means that less calls to
- regtry() should be needed.
-
- REx compiler's optimizer found 4 possible hints:
- a) Anchored substring;
- b) Fixed substring;
- c) Whether we are anchored (beginning-of-line or \G);
- d) First node (of those at offset 0) which may distingush positions;
- We use a)b)d) and multiline-part of c), and try to find a position in the
- string which does not contradict any of them.
- */
-
-/* Most of decisions we do here should have been done at compile time.
- The nodes of the REx which we used for the search should have been
- deleted from the finite automaton. */
-
-char *
-Perl_re_intuit_start(pTHX_ REGEXP * const rx, SV *sv, char *strpos,
- char *strend, const U32 flags, re_scream_pos_data *data)
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- register I32 start_shift = 0;
- /* Should be nonnegative! */
- register I32 end_shift = 0;
- register char *s;
- register SV *check;
- char *strbeg;
- char *t;
- const bool do_utf8 = (sv && SvUTF8(sv)) ? 1 : 0; /* if no sv we have to assume bytes */
- I32 ml_anch;
- register char *other_last = NULL; /* other substr checked before this */
- char *check_at = NULL; /* check substr found at this pos */
- const I32 multiline = prog->extflags & RXf_PMf_MULTILINE;
- RXi_GET_DECL(prog,progi);
-#ifdef DEBUGGING
- const char * const i_strpos = strpos;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_START;
-
- RX_MATCH_UTF8_set(rx,do_utf8);
-
- if (RX_UTF8(rx)) {
- PL_reg_flags |= RF_utf8;
- }
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, strpos, strend,
- sv ? "Guessing start of match in sv for"
- : "Guessing start of match in string for");
- );
-
- /* CHR_DIST() would be more correct here but it makes things slow. */
- if (prog->minlen > strend - strpos) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short... [re_intuit_start]\n"));
- goto fail;
- }
-
- strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos;
- PL_regeol = strend;
- if (do_utf8) {
- if (!prog->check_utf8 && prog->check_substr)
- to_utf8_substr(prog);
- check = prog->check_utf8;
- } else {
- if (!prog->check_substr && prog->check_utf8)
- to_byte_substr(prog);
- check = prog->check_substr;
- }
- if (check == &PL_sv_undef) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Non-utf8 string cannot match utf8 check string\n"));
- goto fail;
- }
- if (prog->extflags & RXf_ANCH) { /* Match at beg-of-str or after \n */
- ml_anch = !( (prog->extflags & RXf_ANCH_SINGLE)
- || ( (prog->extflags & RXf_ANCH_BOL)
- && !multiline ) ); /* Check after \n? */
-
- if (!ml_anch) {
- if ( !(prog->extflags & RXf_ANCH_GPOS) /* Checked by the caller */
- && !(prog->intflags & PREGf_IMPLICIT) /* not a real BOL */
- /* SvCUR is not set on references: SvRV and SvPVX_const overlap */
- && sv && !SvROK(sv)
- && (strpos != strbeg)) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not at start...\n"));
- goto fail;
- }
- if (prog->check_offset_min == prog->check_offset_max &&
- !(prog->extflags & RXf_CANY_SEEN)) {
- /* Substring at constant offset from beg-of-str... */
- I32 slen;
-
- s = HOP3c(strpos, prog->check_offset_min, strend);
-
- if (SvTAIL(check)) {
- slen = SvCUR(check); /* >= 1 */
-
- if ( strend - s > slen || strend - s < slen - 1
- || (strend - s == slen && strend[-1] != '\n')) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String too long...\n"));
- goto fail_finish;
- }
- /* Now should match s[0..slen-2] */
- slen--;
- if (slen && (*SvPVX_const(check) != *s
- || (slen > 1
- && memNE(SvPVX_const(check), s, slen)))) {
- report_neq:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String not equal...\n"));
- goto fail_finish;
- }
- }
- else if (*SvPVX_const(check) != *s
- || ((slen = SvCUR(check)) > 1
- && memNE(SvPVX_const(check), s, slen)))
- goto report_neq;
- check_at = s;
- goto success_at_start;
- }
- }
- /* Match is anchored, but substr is not anchored wrt beg-of-str. */
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- if (!ml_anch) {
- const I32 end = prog->check_offset_max + CHR_SVLEN(check)
- - (SvTAIL(check) != 0);
- const I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end;
-
- if (end_shift < eshift)
- end_shift = eshift;
- }
- }
- else { /* Can match at random position */
- ml_anch = 0;
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- /* end shift should be non negative here */
- }
-
-#ifdef QDEBUGGING /* 7/99: reports of failure (with the older version) */
- if (end_shift < 0)
- Perl_croak(aTHX_ "panic: end_shift: %"IVdf" pattern:\n%s\n ",
- (IV)end_shift, RX_PRECOMP(prog));
-#endif
-
- restart:
- /* Find a possible match in the region s..strend by looking for
- the "check" substring in the region corrected by start/end_shift. */
-
- {
- I32 srch_start_shift = start_shift;
- I32 srch_end_shift = end_shift;
- if (srch_start_shift < 0 && strbeg - s > srch_start_shift) {
- srch_end_shift -= ((strbeg - s) - srch_start_shift);
- srch_start_shift = strbeg - s;
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "Check offset min: %"IVdf" Start shift: %"IVdf" End shift %"IVdf" Real End Shift: %"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)srch_start_shift,
- (IV)srch_end_shift,
- (IV)prog->check_end_shift);
- });
-
- if (flags & REXEC_SCREAM) {
- I32 p = -1; /* Internal iterator of scream. */
- I32 * const pp = data ? data->scream_pos : &p;
-
- if (PL_screamfirst[BmRARE(check)] >= 0
- || ( BmRARE(check) == '\n'
- && (BmPREVIOUS(check) == SvCUR(check) - 1)
- && SvTAIL(check) ))
- s = screaminstr(sv, check,
- srch_start_shift + (s - strbeg), srch_end_shift, pp, 0);
- else
- goto fail_finish;
- /* we may be pointing at the wrong string */
- if (s && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- if (data)
- *data->scream_olds = s;
- }
- else {
- U8* start_point;
- U8* end_point;
- if (prog->extflags & RXf_CANY_SEEN) {
- start_point= (U8*)(s + srch_start_shift);
- end_point= (U8*)(strend - srch_end_shift);
- } else {
- start_point= HOP3(s, srch_start_shift, srch_start_shift < 0 ? strbeg : strend);
- end_point= HOP3(strend, -srch_end_shift, strbeg);
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "fbm_instr len=%d str=<%.*s>\n",
- (int)(end_point - start_point),
- (int)(end_point - start_point) > 20 ? 20 : (int)(end_point - start_point),
- start_point);
- });
-
- s = fbm_instr( start_point, end_point,
- check, multiline ? FBMrf_MULTILINE : 0);
- }
- }
- /* Update the count-of-usability, remove useless subpatterns,
- unshift s. */
-
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(check), RE_SV_DUMPLEN(check), 30);
- PerlIO_printf(Perl_debug_log, "%s %s substr %s%s%s",
- (s ? "Found" : "Did not find"),
- (check == (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)
- ? "anchored" : "floating"),
- quoted,
- RE_SV_TAIL(check),
- (s ? " at offset " : "...\n") );
- });
-
- if (!s)
- goto fail_finish;
- /* Finish the diagnostic message */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) );
-
- /* XXX dmq: first branch is for positive lookbehind...
- Our check string is offset from the beginning of the pattern.
- So we need to do any stclass tests offset forward from that
- point. I think. :-(
- */
-
-
-
- check_at=s;
-
-
- /* Got a candidate. Check MBOL anchoring, and the *other* substr.
- Start with the other substr.
- XXXX no SCREAM optimization yet - and a very coarse implementation
- XXXX /ttx+/ results in anchored="ttx", floating="x". floating will
- *always* match. Probably should be marked during compile...
- Probably it is right to do no SCREAM here...
- */
-
- if (do_utf8 ? (prog->float_utf8 && prog->anchored_utf8)
- : (prog->float_substr && prog->anchored_substr))
- {
- /* Take into account the "other" substring. */
- /* XXXX May be hopelessly wrong for UTF... */
- if (!other_last)
- other_last = strpos;
- if (check == (do_utf8 ? prog->float_utf8 : prog->float_substr)) {
- do_other_anchored:
- {
- char * const last = HOP3c(s, -start_shift, strbeg);
- char *last1, *last2;
- char * const saved_s = s;
- SV* must;
-
- t = s - prog->check_offset_max;
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -(prog->check_offset_max), (U8*)strpos))
- && t > strpos)))
- NOOP;
- else
- t = strpos;
- t = HOP3c(t, prog->anchored_offset, strend);
- if (t < other_last) /* These positions already checked */
- t = other_last;
- last2 = last1 = HOP3c(strend, -prog->minlen, strbeg);
- if (last < last1)
- last1 = last;
- /* XXXX It is not documented what units *_offsets are in.
- We assume bytes, but this is clearly wrong.
- Meaning this code needs to be carefully reviewed for errors.
- dmq.
- */
-
- /* On end-of-str: see comment below. */
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->anchored_utf8); /* for debug */
- }
- else
- s = fbm_instr(
- (unsigned char*)t,
- HOP3(HOP3(last1, prog->anchored_offset, strend)
- + SvCUR(must), -(SvTAIL(must)!=0), strbeg),
- must,
- multiline ? FBMrf_MULTILINE : 0
- );
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s anchored substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
-
-
- if (!s) {
- if (last1 >= last2) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying floating at offset %ld...\n",
- (long)(HOP3c(saved_s, 1, strend) - i_strpos)));
- other_last = HOP3c(last1, prog->anchored_offset+1, strend);
- s = HOP3c(last, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- t = HOP3c(s, -prog->anchored_offset, strbeg);
- other_last = HOP3c(s, 1, strend);
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
- else { /* Take into account the floating substring. */
- char *last, *last1;
- char * const saved_s = s;
- SV* must;
-
- t = HOP3c(s, -start_shift, strbeg);
- last1 = last =
- HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg);
- if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset)
- last = HOP3c(t, prog->float_max_offset, strend);
- s = HOP3c(t, prog->float_min_offset, strend);
- if (s < other_last)
- s = other_last;
- /* XXXX It is not documented what units *_offsets are in. Assume bytes. */
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- /* fbm_instr() takes into account exact value of end-of-str
- if the check is SvTAIL(ed). Since false positives are OK,
- and end-of-str is not later than strend we are OK. */
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->float_utf8); /* for debug message */
- }
- else
- s = fbm_instr((unsigned char*)s,
- (unsigned char*)last + SvCUR(must)
- - (SvTAIL(must)!=0),
- must, multiline ? FBMrf_MULTILINE : 0);
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s floating substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
- if (!s) {
- if (last1 == last) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying anchored starting at offset %ld...\n",
- (long)(saved_s + 1 - i_strpos)));
- other_last = last;
- s = HOP3c(t, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- other_last = s; /* Fix this later. --Hugo */
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
-
-
- t= (char*)HOP3( s, -prog->check_offset_max, (prog->check_offset_max<0) ? strend : strpos);
-
- DEBUG_OPTIMISE_MORE_r(
- PerlIO_printf(Perl_debug_log,
- "Check offset min:%"IVdf" max:%"IVdf" S:%"IVdf" t:%"IVdf" D:%"IVdf" end:%"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)prog->check_offset_max,
- (IV)(s-strpos),
- (IV)(t-strpos),
- (IV)(t-s),
- (IV)(strend-strpos)
- )
- );
-
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -prog->check_offset_max, (U8*) ((prog->check_offset_max<0) ? strend : strpos)))
- && t > strpos)))
- {
- /* Fixed substring is found far enough so that the match
- cannot start at strpos. */
- try_at_offset:
- if (ml_anch && t[-1] != '\n') {
- /* Eventually fbm_*() should handle this, but often
- anchored_offset is not 0, so this check will not be wasted. */
- /* XXXX In the code below we prefer to look for "^" even in
- presence of anchored substrings. And we search even
- beyond the found float position. These pessimizations
- are historical artefacts only. */
- find_anchor:
- while (t < strend - prog->minlen) {
- if (*t == '\n') {
- if (t < check_at - prog->check_offset_min) {
- if (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) {
- /* Since we moved from the found position,
- we definitely contradict the found anchored
- substr. Due to the above check we do not
- contradict "check" substr.
- Thus we can arrive here only if check substr
- is float. Redo checking for "other"=="fixed".
- */
- strpos = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset)));
- goto do_other_anchored;
- }
- /* We don't contradict the found floating substring. */
- /* XXXX Why not check for STCLASS? */
- s = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(s - i_strpos)));
- goto set_useful;
- }
- /* Position contradicts check-string */
- /* XXXX probably better to look for check-string
- than for "\n", so one should lower the limit for t? */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t + 1 - i_strpos)));
- other_last = strpos = s = t + 1;
- goto restart;
- }
- t++;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- goto fail_finish;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- }
- s = t;
- set_useful:
- ++BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr); /* hooray/5 */
- }
- else {
- /* The found string does not prohibit matching at strpos,
- - no optimization of calling REx engine can be performed,
- unless it was an MBOL and we are not after MBOL,
- or a future STCLASS check will fail this. */
- try_at_start:
- /* Even in this situation we may use MBOL flag if strpos is offset
- wrt the start of the string. */
- if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */
- && (strpos != strbeg) && strpos[-1] != '\n'
- /* May be due to an implicit anchor of m{.*foo} */
- && !(prog->intflags & PREGf_IMPLICIT))
- {
- t = strpos;
- goto find_anchor;
- }
- DEBUG_EXECUTE_r( if (ml_anch)
- PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n",
- (long)(strpos - i_strpos), PL_colors[0], PL_colors[1]);
- );
- success_at_start:
- if (!(prog->intflags & PREGf_NAUGHTY) /* XXXX If strpos moved? */
- && (do_utf8 ? (
- prog->check_utf8 /* Could be deleted already */
- && --BmUSEFUL(prog->check_utf8) < 0
- && (prog->check_utf8 == prog->float_utf8)
- ) : (
- prog->check_substr /* Could be deleted already */
- && --BmUSEFUL(prog->check_substr) < 0
- && (prog->check_substr == prog->float_substr)
- )))
- {
- /* If flags & SOMETHING - do not do it many times on the same match */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n"));
- SvREFCNT_dec(do_utf8 ? prog->check_utf8 : prog->check_substr);
- if (do_utf8 ? prog->check_substr : prog->check_utf8)
- SvREFCNT_dec(do_utf8 ? prog->check_substr : prog->check_utf8);
- prog->check_substr = prog->check_utf8 = NULL; /* disable */
- prog->float_substr = prog->float_utf8 = NULL; /* clear */
- check = NULL; /* abort */
- s = strpos;
- /* XXXX This is a remnant of the old implementation. It
- looks wasteful, since now INTUIT can use many
- other heuristics. */
- prog->extflags &= ~RXf_USE_INTUIT;
- }
- else
- s = strpos;
- }
-
- /* Last resort... */
- /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */
- /* trie stclasses are too expensive to use here, we are better off to
- leave it to regmatch itself */
- if (progi->regstclass && PL_regkind[OP(progi->regstclass)]!=TRIE) {
- /* minlen == 0 is possible if regstclass is \b or \B,
- and the fixed substr is ''$.
- Since minlen is already taken into account, s+1 is before strend;
- accidentally, minlen >= 1 guaranties no false positives at s + 1
- even for \b or \B. But (minlen? 1 : 0) below assumes that
- regstclass does not come from lookahead... */
- /* If regstclass takes bytelength more than 1: If charlength==1, OK.
- This leaves EXACTF only, which is dealt with in find_byclass(). */
- const U8* const str = (U8*)STRING(progi->regstclass);
- const int cl_l = (PL_regkind[OP(progi->regstclass)] == EXACT
- ? CHR_DIST(str+STR_LEN(progi->regstclass), str)
- : 1);
- char * endpos;
- if (prog->anchored_substr || prog->anchored_utf8 || ml_anch)
- endpos= HOP3c(s, (prog->minlen ? cl_l : 0), strend);
- else if (prog->float_substr || prog->float_utf8)
- endpos= HOP3c(HOP3c(check_at, -start_shift, strbeg), cl_l, strend);
- else
- endpos= strend;
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %"IVdf" s: %"IVdf" endpos: %"IVdf"\n",
- (IV)start_shift, (IV)(check_at - strbeg), (IV)(s - strbeg), (IV)(endpos - strbeg)));
-
- t = s;
- s = find_byclass(prog, progi->regstclass, s, endpos, NULL);
- if (!s) {
-#ifdef DEBUGGING
- const char *what = NULL;
-#endif
- if (endpos == strend) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "This position contradicts STCLASS...\n") );
- if ((prog->extflags & RXf_ANCH) && !ml_anch)
- goto fail;
- /* Contradict one of substrings */
- if (prog->anchored_substr || prog->anchored_utf8) {
- if ((do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) == check) {
- DEBUG_EXECUTE_r( what = "anchored" );
- hop_and_restart:
- s = HOP3c(t, 1, strend);
- if (s + start_shift + end_shift > strend) {
- /* XXXX Should be taken into account earlier? */
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for %s substr starting at offset %ld...\n",
- what, (long)(s + start_shift - i_strpos)) );
- goto restart;
- }
- /* Have both, check_string is floating */
- if (t + start_shift >= check_at) /* Contradicts floating=check */
- goto retry_floating_check;
- /* Recheck anchored substring, but not floating... */
- s = check_at;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for anchored substr starting at offset %ld...\n",
- (long)(other_last - i_strpos)) );
- goto do_other_anchored;
- }
- /* Another way we could have checked stclass at the
- current position only: */
- if (ml_anch) {
- s = t = t + 1;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for /%s^%s/m starting at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t - i_strpos)) );
- goto try_at_offset;
- }
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) /* Could have been deleted */
- goto fail;
- /* Check is floating subtring. */
- retry_floating_check:
- t = check_at - start_shift;
- DEBUG_EXECUTE_r( what = "floating" );
- goto hop_and_restart;
- }
- if (t != s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "By STCLASS: moving %ld --> %ld\n",
- (long)(t - i_strpos), (long)(s - i_strpos))
- );
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Does not contradict STCLASS...\n");
- );
- }
- }
- giveup:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n",
- PL_colors[4], (check ? "Guessed" : "Giving up"),
- PL_colors[5], (long)(s - i_strpos)) );
- return s;
-
- fail_finish: /* Substring not found */
- if (prog->check_substr || prog->check_utf8) /* could be removed already */
- BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr) += 5; /* hooray */
- fail:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n",
- PL_colors[4], PL_colors[5]));
- return NULL;
-}
-
-#define DECL_TRIE_TYPE(scan) \
- const enum { trie_plain, trie_utf8, trie_utf8_fold, trie_latin_utf8_fold } \
- trie_type = (scan->flags != EXACT) \
- ? (do_utf8 ? trie_utf8_fold : (UTF ? trie_latin_utf8_fold : trie_plain)) \
- : (do_utf8 ? trie_utf8 : trie_plain)
-
-#define REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, uscan, len, \
-uvc, charid, foldlen, foldbuf, uniflags) STMT_START { \
- UV uvc_unfolded = 0; \
- switch (trie_type) { \
- case trie_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc_unfolded = uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- uvc_unfolded = uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_latin_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- len = 1; \
- uvc = to_uni_fold( *(U8*)uc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_utf8: \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- break; \
- case trie_plain: \
- uvc = (UV)*uc; \
- len = 1; \
- } \
- \
- if (uvc < 256) { \
- charid = trie->charmap[ uvc ]; \
- } \
- else { \
- charid = 0; \
- if (widecharmap) { \
- SV** const svpp = hv_fetch(widecharmap, \
- (char*)&uvc, sizeof(UV), 0); \
- if (svpp) \
- charid = (U16)SvIV(*svpp); \
- } \
- } \
- if (!charid && trie_type == trie_utf8_fold && !UTF) { \
- charid = trie->charmap[uvc_unfolded]; \
- } \
-} STMT_END
-
-#define REXEC_FBC_EXACTISH_CHECK(CoNd) \
-{ \
- char *my_strend= (char *)strend; \
- if ( (CoNd) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8, \
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- else { \
- U8 foldbuf[UTF8_MAXBYTES_CASE+1]; \
- uvchr_to_utf8(tmpbuf, c); \
- f = to_utf8_fold(tmpbuf, foldbuf, &foldlen); \
- if ( f != c \
- && (f == c1 || f == c2) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8,\
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- } \
-} \
-s += len
-
-#define REXEC_FBC_EXACTISH_SCAN(CoNd) \
-STMT_START { \
- while (s <= e) { \
- if ( (CoNd) \
- && (ln == 1 || !(OP(c) == EXACTF \
- ? ibcmp(s, m, ln) \
- : ibcmp_locale(s, m, ln))) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_SCAN(CoDe) \
-STMT_START { \
- while (s + (uskip = UTF8SKIP(s)) <= strend) { \
- CoDe \
- s += uskip; \
- } \
-} STMT_END
-
-#define REXEC_FBC_SCAN(CoDe) \
-STMT_START { \
- while (s < strend) { \
- CoDe \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_CLASS_SCAN(CoNd) \
-REXEC_FBC_UTF8_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_CLASS_SCAN(CoNd) \
-REXEC_FBC_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_TRYIT \
-if ((!reginfo || regtry(reginfo, &s))) \
- goto got_it
-
-#define REXEC_FBC_CSCAN(CoNdUtF8,CoNd) \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_PRELOAD(UtFpReLoAd,CoNdUtF8,CoNd) \
- if (do_utf8) { \
- UtFpReLoAd; \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_TAINT(CoNdUtF8,CoNd) \
- PL_reg_flags |= RF_tainted; \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define DUMP_EXEC_POS(li,s,doutf8) \
- dump_exec_pos(li,s,(PL_regeol),(PL_bostr),(PL_reg_starttry),doutf8)
-
-/* We know what class REx starts with. Try to find this position... */
-/* if reginfo is NULL, its a dryrun */
-/* annoyingly all the vars in this routine have different names from their counterparts
- in regmatch. /grrr */
-
-STATIC char *
-S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
- const char *strend, regmatch_info *reginfo)
-{
- dVAR;
- const I32 doevery = (prog->intflags & PREGf_SKIP) == 0;
- char *m;
- STRLEN ln;
- STRLEN lnc;
- register STRLEN uskip;
- unsigned int c1;
- unsigned int c2;
- char *e;
- register I32 tmp = 1; /* Scratch variable? */
- register const bool do_utf8 = PL_reg_match_utf8;
- RXi_GET_DECL(prog,progi);
-
- PERL_ARGS_ASSERT_FIND_BYCLASS;
-
- /* We know what class it must start with. */
- switch (OP(c)) {
- case ANYOF:
- if (do_utf8) {
- REXEC_FBC_UTF8_CLASS_SCAN((ANYOF_FLAGS(c) & ANYOF_UNICODE) ||
- !UTF8_IS_INVARIANT((U8)s[0]) ?
- reginclass(prog, c, (U8*)s, 0, do_utf8) :
- REGINCLASS(prog, c, (U8*)s));
- }
- else {
- while (s < strend) {
- STRLEN skip = 1;
-
- if (REGINCLASS(prog, c, (U8*)s) ||
- (ANYOF_FOLD_SHARP_S(c, s, strend) &&
- /* The assignment of 2 is intentional:
- * for the folded sharp s, the skip is 2. */
- (skip = SHARP_S_SKIP))) {
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += skip;
- }
- }
- break;
- case CANY:
- REXEC_FBC_SCAN(
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- );
- break;
- case EXACTF:
- m = STRING(c);
- ln = STR_LEN(c); /* length to match in octets/bytes */
- lnc = (I32) ln; /* length to match in characters */
- if (UTF) {
- STRLEN ulen1, ulen2;
- U8 *sm = (U8 *) m;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
- /* used by commented-out code below */
- /*const U32 uniflags = UTF8_ALLOW_DEFAULT;*/
-
- /* XXX: Since the node will be case folded at compile
- time this logic is a little odd, although im not
- sure that its actually wrong. --dmq */
-
- c1 = to_utf8_lower((U8*)m, tmpbuf1, &ulen1);
- c2 = to_utf8_upper((U8*)m, tmpbuf2, &ulen2);
-
- /* XXX: This is kinda strange. to_utf8_XYZ returns the
- codepoint of the first character in the converted
- form, yet originally we did the extra step.
- No tests fail by commenting this code out however
- so Ive left it out. -- dmq.
-
- c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- */
-
- lnc = 0;
- while (sm < ((U8 *) m + ln)) {
- lnc++;
- sm += UTF8SKIP(sm);
- }
- }
- else {
- c1 = *(U8*)m;
- c2 = PL_fold[c1];
- }
- goto do_exactf;
- case EXACTFL:
- m = STRING(c);
- ln = STR_LEN(c);
- lnc = (I32) ln;
- c1 = *(U8*)m;
- c2 = PL_fold_locale[c1];
- do_exactf:
- e = HOP3c(strend, -((I32)lnc), s);
-
- if (!reginfo && e < s)
- e = s; /* Due to minlen logic of intuit() */
-
- /* The idea in the EXACTF* cases is to first find the
- * first character of the EXACTF* node and then, if
- * necessary, case-insensitively compare the full
- * text of the node. The c1 and c2 are the first
- * characters (though in Unicode it gets a bit
- * more complicated because there are more cases
- * than just upper and lower: one needs to use
- * the so-called folding case for case-insensitive
- * matching (called "loose matching" in Unicode).
- * ibcmp_utf8() will do just that. */
-
- if (do_utf8 || UTF) {
- UV c, f;
- U8 tmpbuf [UTF8_MAXBYTES+1];
- STRLEN len = 1;
- STRLEN foldlen;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- if (c1 == c2) {
- /* Upper and lower of 1st char are equal -
- * probably not a "letter". */
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
- REXEC_FBC_EXACTISH_CHECK(c == c1);
- }
- }
- else {
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
-
- /* Handle some of the three Greek sigmas cases.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (the character class or ANYOF cases)
- * are handled during compiletime in
- * regexec.c:S_regclass(). */
- if (c == (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA ||
- c == (UV)UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA)
- c = (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA;
-
- REXEC_FBC_EXACTISH_CHECK(c == c1 || c == c2);
- }
- }
- }
- else {
- /* Neither pattern nor string are UTF8 */
- if (c1 == c2)
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1);
- else
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1 || *(U8*)s == c2);
- }
- break;
- case BOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == BOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == BOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- if ((!prog->minlen && tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NBOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == NBOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == NBOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == NBOUND ?
- isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- if ((!prog->minlen && !tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case ALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_ALNUM(),
- swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8),
- isALNUM(*s)
- );
- case ALNUML:
- REXEC_FBC_CSCAN_TAINT(
- isALNUM_LC_utf8((U8*)s),
- isALNUM_LC(*s)
- );
- case NALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_ALNUM(),
- !swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8),
- !isALNUM(*s)
- );
- case NALNUML:
- REXEC_FBC_CSCAN_TAINT(
- !isALNUM_LC_utf8((U8*)s),
- !isALNUM_LC(*s)
- );
- case SPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_SPACE(),
- *s == ' ' || swash_fetch(PL_utf8_space,(U8*)s, do_utf8),
- isSPACE(*s)
- );
- case SPACEL:
- REXEC_FBC_CSCAN_TAINT(
- *s == ' ' || isSPACE_LC_utf8((U8*)s),
- isSPACE_LC(*s)
- );
- case NSPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_SPACE(),
- !(*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s, do_utf8)),
- !isSPACE(*s)
- );
- case NSPACEL:
- REXEC_FBC_CSCAN_TAINT(
- !(*s == ' ' || isSPACE_LC_utf8((U8*)s)),
- !isSPACE_LC(*s)
- );
- case DIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_DIGIT(),
- swash_fetch(PL_utf8_digit,(U8*)s, do_utf8),
- isDIGIT(*s)
- );
- case DIGITL:
- REXEC_FBC_CSCAN_TAINT(
- isDIGIT_LC_utf8((U8*)s),
- isDIGIT_LC(*s)
- );
- case NDIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_DIGIT(),
- !swash_fetch(PL_utf8_digit,(U8*)s, do_utf8),
- !isDIGIT(*s)
- );
- case NDIGITL:
- REXEC_FBC_CSCAN_TAINT(
- !isDIGIT_LC_utf8((U8*)s),
- !isDIGIT_LC(*s)
- );
- case LNBREAK:
- REXEC_FBC_CSCAN(
- is_LNBREAK_utf8(s),
- is_LNBREAK_latin1(s)
- );
- case VERTWS:
- REXEC_FBC_CSCAN(
- is_VERTWS_utf8(s),
- is_VERTWS_latin1(s)
- );
- case NVERTWS:
- REXEC_FBC_CSCAN(
- !is_VERTWS_utf8(s),
- !is_VERTWS_latin1(s)
- );
- case HORIZWS:
- REXEC_FBC_CSCAN(
- is_HORIZWS_utf8(s),
- is_HORIZWS_latin1(s)
- );
- case NHORIZWS:
- REXEC_FBC_CSCAN(
- !is_HORIZWS_utf8(s),
- !is_HORIZWS_latin1(s)
- );
- case AHOCORASICKC:
- case AHOCORASICK:
- {
- DECL_TRIE_TYPE(c);
- /* what trie are we using right now */
- reg_ac_data *aho
- = (reg_ac_data*)progi->data->data[ ARG( c ) ];
- reg_trie_data *trie
- = (reg_trie_data*)progi->data->data[ aho->trie ];
- HV *widecharmap = MUTABLE_HV(progi->data->data[ aho->trie + 1 ]);
-
- const char *last_start = strend - trie->minlen;
-#ifdef DEBUGGING
- const char *real_start = s;
-#endif
- STRLEN maxlen = trie->maxlen;
- SV *sv_points;
- U8 **points; /* map of where we were in the input string
- when reading a given char. For ASCII this
- is unnecessary overhead as the relationship
- is always 1:1, but for Unicode, especially
- case folded Unicode this is not true. */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- U8 *bitmap=NULL;
-
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- /* We can't just allocate points here. We need to wrap it in
- * an SV so it gets freed properly if there is a croak while
- * running the match */
- ENTER;
- SAVETMPS;
- sv_points=newSV(maxlen * sizeof(U8 *));
- SvCUR_set(sv_points,
- maxlen * sizeof(U8 *));
- SvPOK_on(sv_points);
- sv_2mortal(sv_points);
- points=(U8**)SvPV_nolen(sv_points );
- if ( trie_type != trie_utf8_fold
- && (trie->bitmap || OP(c)==AHOCORASICKC) )
- {
- if (trie->bitmap)
- bitmap=(U8*)trie->bitmap;
- else
- bitmap=(U8*)ANYOF_BITMAP(c);
- }
- /* this is the Aho-Corasick algorithm modified a touch
- to include special handling for long "unknown char"
- sequences. The basic idea being that we use AC as long
- as we are dealing with a possible matching char, when
- we encounter an unknown char (and we have not encountered
- an accepting state) we scan forward until we find a legal
- starting char.
- AC matching is basically that of trie matching, except
- that when we encounter a failing transition, we fall back
- to the current states "fail state", and try the current char
- again, a process we repeat until we reach the root state,
- state 1, or a legal transition. If we fail on the root state
- then we can either terminate if we have reached an accepting
- state previously, or restart the entire process from the beginning
- if we have not.
-
- */
- while (s <= last_start) {
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- U8 *uc = (U8*)s;
- U16 charid = 0;
- U32 base = 1;
- U32 state = 1;
- UV uvc = 0;
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- U8 *leftmost = NULL;
-#ifdef DEBUGGING
- U32 accepted_word= 0;
-#endif
- U32 pointpos = 0;
-
- while ( state && uc <= (U8*)strend ) {
- int failed=0;
- U32 word = aho->states[ state ].wordnum;
-
- if( state==1 ) {
- if ( bitmap ) {
- DEBUG_TRIE_EXECUTE_r(
- if ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- dump_exec_pos( (char *)uc, c, strend, real_start,
- (char *)uc, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- " Scanning for legal start char...\n");
- }
- );
- while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- uc++;
- }
- s= (char *)uc;
- }
- if (uc >(U8*)last_start) break;
- }
-
- if ( word ) {
- U8 *lpos= points[ (pointpos - trie->wordlen[word-1] ) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=word);
- leftmost= lpos;
- }
- if (base==0) break;
-
- }
- points[pointpos++ % maxlen]= uc;
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
- DEBUG_TRIE_EXECUTE_r({
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf(Perl_debug_log,
- " Charid:%3u CP:%4"UVxf" ",
- charid, uvc);
- });
-
- do {
-#ifdef DEBUGGING
- word = aho->states[ state ].wordnum;
-#endif
- base = aho->states[ state ].trans.base;
-
- DEBUG_TRIE_EXECUTE_r({
- if (failed)
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%sState: %4"UVxf", word=%"UVxf,
- failed ? " Fail transition to " : "",
- (UV)state, (UV)word);
- });
- if ( base ) {
- U32 tmp;
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state
- && (tmp=trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next))
- {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - legal\n"));
- state = tmp;
- break;
- }
- else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - fail\n"));
- failed = 1;
- state = aho->fail[state];
- }
- }
- else {
- /* we must be accepting here */
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - accepting\n"));
- failed = 1;
- break;
- }
- } while(state);
- uc += len;
- if (failed) {
- if (leftmost)
- break;
- if (!state) state = 1;
- }
- }
- if ( aho->states[ state ].wordnum ) {
- U8 *lpos = points[ (pointpos - trie->wordlen[aho->states[ state ].wordnum-1]) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=aho->states[ state ].wordnum);
- leftmost = lpos;
- }
- }
- if (leftmost) {
- s = (char*)leftmost;
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf(
- Perl_debug_log,"Matches word #%"UVxf" at position %"IVdf". Trying full pattern...\n",
- (UV)accepted_word, (IV)(s - real_start)
- );
- });
- if (!reginfo || regtry(reginfo, &s)) {
- FREETMPS;
- LEAVE;
- goto got_it;
- }
- s = HOPc(s,1);
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,"Pattern failed. Looking for new start point...\n");
- });
- } else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,"No match.\n"));
- break;
- }
- }
- FREETMPS;
- LEAVE;
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c));
- break;
- }
- return 0;
- got_it:
- return s;
-}
-
-
-/*
- - regexec_flags - match a regexp against a string
- */
-I32
-Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, register char *strend,
- char *strbeg, I32 minend, SV *sv, void *data, U32 flags)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* data: May be used for some additional optimizations.
- Currently its only used, with a U32 cast, for transmitting
- the ganch offset when doing a /g match. This will change */
-/* nosave: For optimizations. */
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- /*register*/ char *s;
- register regnode *c;
- /*register*/ char *startpos = stringarg;
- I32 minlen; /* must match at least this many chars */
- I32 dontbother = 0; /* how many characters not to try at end */
- I32 end_shift = 0; /* Same for the end. */ /* CC */
- I32 scream_pos = -1; /* Internal iterator of scream. */
- char *scream_olds = NULL;
- const bool do_utf8 = (bool)DO_UTF8(sv);
- I32 multiline;
- RXi_GET_DECL(prog,progi);
- regmatch_info reginfo; /* create some info to pass to regtry etc */
- regexp_paren_pair *swap = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGEXEC_FLAGS;
- PERL_UNUSED_ARG(data);
-
- /* Be paranoid... */
- if (prog == NULL || startpos == NULL) {
- Perl_croak(aTHX_ "NULL regexp parameter");
- return 0;
- }
-
- multiline = prog->extflags & RXf_PMf_MULTILINE;
- reginfo.prog = rx; /* Yes, sorry that this is confusing. */
-
- RX_MATCH_UTF8_set(rx, do_utf8);
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, startpos, strend,
- "Matching");
- );
-
- minlen = prog->minlen;
-
- if (strend - startpos < (minlen+(prog->check_offset_min<0?prog->check_offset_min:0))) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short [regexec_flags]...\n"));
- goto phooey;
- }
-
-
- /* Check validity of program. */
- if (UCHARAT(progi->program) != REG_MAGIC) {
- Perl_croak(aTHX_ "corrupted regexp program");
- }
-
- PL_reg_flags = 0;
- PL_reg_eval_set = 0;
- PL_reg_maxiter = 0;
-
- if (RX_UTF8(rx))
- PL_reg_flags |= RF_utf8;
-
- /* Mark beginning of line for ^ and lookbehind. */
- reginfo.bol = startpos; /* XXX not used ??? */
- PL_bostr = strbeg;
- reginfo.sv = sv;
-
- /* Mark end of line for $ (and such) */
- PL_regeol = strend;
-
- /* see how far we have to get to not match where we matched before */
- reginfo.till = startpos+minend;
-
- /* If there is a "must appear" string, look for it. */
- s = startpos;
-
- if (prog->extflags & RXf_GPOS_SEEN) { /* Need to set reginfo->ganch */
- MAGIC *mg;
- if (flags & REXEC_IGNOREPOS){ /* Means: check only at start */
- reginfo.ganch = startpos + prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS IGNOREPOS: reginfo.ganch = startpos + %"UVxf"\n",(UV)prog->gofs));
- } else if (sv && SvTYPE(sv) >= SVt_PVMG
- && SvMAGIC(sv)
- && (mg = mg_find(sv, PERL_MAGIC_regex_global))
- && mg->mg_len >= 0) {
- reginfo.ganch = strbeg + mg->mg_len; /* Defined pos() */
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS MAGIC: reginfo.ganch = strbeg + %"IVdf"\n",(IV)mg->mg_len));
-
- if (prog->extflags & RXf_ANCH_GPOS) {
- if (s > reginfo.ganch)
- goto phooey;
- s = reginfo.ganch - prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS ANCH_GPOS: s = ganch - %"UVxf"\n",(UV)prog->gofs));
- if (s < strbeg)
- goto phooey;
- }
- }
- else if (data) {
- reginfo.ganch = strbeg + PTR2UV(data);
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS DATA: reginfo.ganch= strbeg + %"UVxf"\n",PTR2UV(data)));
-
- } else { /* pos() not defined */
- reginfo.ganch = strbeg;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS: reginfo.ganch = strbeg\n"));
- }
- }
- if (PL_curpm && (PM_GETRE(PL_curpm) == rx)) {
- /* We have to be careful. If the previous successful match
- was from this regex we don't want a subsequent partially
- successful match to clobber the old results.
- So when we detect this possibility we add a swap buffer
- to the re, and switch the buffer each match. If we fail
- we switch it back, otherwise we leave it swapped.
- */
- swap = prog->offs;
- /* do we need a save destructor here for eval dies? */
- Newxz(prog->offs, (prog->nparens + 1), regexp_paren_pair);
- }
- if (!(flags & REXEC_CHECKED) && (prog->check_substr != NULL || prog->check_utf8 != NULL)) {
- re_scream_pos_data d;
-
- d.scream_olds = &scream_olds;
- d.scream_pos = &scream_pos;
- s = re_intuit_start(rx, sv, s, strend, flags, &d);
- if (!s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not present...\n"));
- goto phooey; /* not present */
- }
- }
-
-
-
- /* Simplest case: anchored match need be tried only once. */
- /* [unless only anchor is BOL and multiline is set] */
- if (prog->extflags & (RXf_ANCH & ~RXf_ANCH_GPOS)) {
- if (s == startpos && regtry(®info, &startpos))
- goto got_it;
- else if (multiline || (prog->intflags & PREGf_IMPLICIT)
- || (prog->extflags & RXf_ANCH_MBOL)) /* XXXX SBOL? */
- {
- char *end;
-
- if (minlen)
- dontbother = minlen - 1;
- end = HOP3c(strend, -dontbother, strbeg) - 1;
- /* for multiline we only have to try after newlines */
- if (prog->check_substr || prog->check_utf8) {
- if (s == startpos)
- goto after_try;
- while (1) {
- if (regtry(®info, &s))
- goto got_it;
- after_try:
- if (s > end)
- goto phooey;
- if (prog->extflags & RXf_USE_INTUIT) {
- s = re_intuit_start(rx, sv, s + 1, strend, flags, NULL);
- if (!s)
- goto phooey;
- }
- else
- s++;
- }
- } else {
- if (s > startpos)
- s--;
- while (s < end) {
- if (*s++ == '\n') { /* don't need PL_utf8skip here */
- if (regtry(®info, &s))
- goto got_it;
- }
- }
- }
- }
- goto phooey;
- } else if (RXf_GPOS_CHECK == (prog->extflags & RXf_GPOS_CHECK))
- {
- /* the warning about reginfo.ganch being used without intialization
- is bogus -- we set it above, when prog->extflags & RXf_GPOS_SEEN
- and we only enter this block when the same bit is set. */
- char *tmp_s = reginfo.ganch - prog->gofs;
-
- if (tmp_s >= strbeg && regtry(®info, &tmp_s))
- goto got_it;
- goto phooey;
- }
-
- /* Messy cases: unanchored match. */
- if ((prog->anchored_substr || prog->anchored_utf8) && prog->intflags & PREGf_SKIP) {
- /* we have /x+whatever/ */
- /* it must be a one character string (XXXX Except UTF?) */
- char ch;
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- ch = SvPVX_const(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)[0];
-
- if (do_utf8) {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s += UTF8SKIP(s);
- while (s < strend && *s == ch)
- s += UTF8SKIP(s);
- }
- );
- }
- else {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s++;
- while (s < strend && *s == ch)
- s++;
- }
- );
- }
- DEBUG_EXECUTE_r(if (!did_match)
- PerlIO_printf(Perl_debug_log,
- "Did not find anchored character...\n")
- );
- }
- else if (prog->anchored_substr != NULL
- || prog->anchored_utf8 != NULL
- || ((prog->float_substr != NULL || prog->float_utf8 != NULL)
- && prog->float_max_offset < strend - s)) {
- SV *must;
- I32 back_max;
- I32 back_min;
- char *last;
- char *last1; /* Last position checked before */
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (prog->anchored_substr || prog->anchored_utf8) {
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- back_max = back_min = prog->anchored_offset;
- } else {
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- back_max = prog->float_max_offset;
- back_min = prog->float_min_offset;
- }
-
-
- if (must == &PL_sv_undef)
- /* could not downgrade utf8 check substring, so must fail */
- goto phooey;
-
- if (back_min<0) {
- last = strend;
- } else {
- last = HOP3c(strend, /* Cannot start after this */
- -(I32)(CHR_SVLEN(must)
- - (SvTAIL(must) != 0) + back_min), strbeg);
- }
- if (s > PL_bostr)
- last1 = HOPc(s, -1);
- else
- last1 = s - 1; /* bogus */
-
- /* XXXX check_substr already used to find "s", can optimize if
- check_substr==must. */
- scream_pos = -1;
- dontbother = end_shift;
- strend = HOPc(strend, -dontbother);
- while ( (s <= last) &&
- ((flags & REXEC_SCREAM)
- ? (s = screaminstr(sv, must, HOP3c(s, back_min, (back_min<0 ? strbeg : strend)) - strbeg,
- end_shift, &scream_pos, 0))
- : (s = fbm_instr((unsigned char*)HOP3(s, back_min, (back_min<0 ? strbeg : strend)),
- (unsigned char*)strend, must,
- multiline ? FBMrf_MULTILINE : 0))) ) {
- /* we may be pointing at the wrong string */
- if ((flags & REXEC_SCREAM) && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- DEBUG_EXECUTE_r( did_match = 1 );
- if (HOPc(s, -back_max) > last1) {
- last1 = HOPc(s, -back_min);
- s = HOPc(s, -back_max);
- }
- else {
- char * const t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1;
-
- last1 = HOPc(s, -back_min);
- s = t;
- }
- if (do_utf8) {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s += UTF8SKIP(s);
- }
- }
- else {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s++;
- }
- }
- }
- DEBUG_EXECUTE_r(if (!did_match) {
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "Did not find %s substr %s%s...\n",
- ((must == prog->anchored_substr || must == prog->anchored_utf8)
- ? "anchored" : "floating"),
- quoted, RE_SV_TAIL(must));
- });
- goto phooey;
- }
- else if ( (c = progi->regstclass) ) {
- if (minlen) {
- const OPCODE op = OP(progi->regstclass);
- /* don't bother with what can't match */
- if (PL_regkind[op] != EXACT && op != CANY && PL_regkind[op] != TRIE)
- strend = HOPc(strend, -(minlen - 1));
- }
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, c);
- {
- RE_PV_QUOTED_DECL(quoted,do_utf8,PERL_DEBUG_PAD_ZERO(1),
- s,strend-s,60);
- PerlIO_printf(Perl_debug_log,
- "Matching stclass %.*s against %s (%d chars)\n",
- (int)SvCUR(prop), SvPVX_const(prop),
- quoted, (int)(strend - s));
- }
- });
- if (find_byclass(prog, c, s, strend, ®info))
- goto got_it;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass... [regexec_flags]\n"));
- }
- else {
- dontbother = 0;
- if (prog->float_substr != NULL || prog->float_utf8 != NULL) {
- /* Trim the end. */
- char *last;
- SV* float_real;
-
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- float_real = do_utf8 ? prog->float_utf8 : prog->float_substr;
-
- if (flags & REXEC_SCREAM) {
- last = screaminstr(sv, float_real, s - strbeg,
- end_shift, &scream_pos, 1); /* last one */
- if (!last)
- last = scream_olds; /* Only one occurrence. */
- /* we may be pointing at the wrong string */
- else if (RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- }
- else {
- STRLEN len;
- const char * const little = SvPV_const(float_real, len);
-
- if (SvTAIL(float_real)) {
- if (memEQ(strend - len + 1, little, len - 1))
- last = strend - len + 1;
- else if (!multiline)
- last = memEQ(strend - len, little, len)
- ? strend - len : NULL;
- else
- goto find_last;
- } else {
- find_last:
- if (len)
- last = rninstr(s, strend, little, little + len);
- else
- last = strend; /* matching "$" */
- }
- }
- if (last == NULL) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%sCan't trim the tail, match fails (should not happen)%s\n",
- PL_colors[4], PL_colors[5]));
- goto phooey; /* Should not happen! */
- }
- dontbother = strend - last + prog->float_min_offset;
- }
- if (minlen && (dontbother < minlen))
- dontbother = minlen - 1;
- strend -= dontbother; /* this one's always in bytes! */
- /* We don't know much -- general case. */
- if (do_utf8) {
- for (;;) {
- if (regtry(®info, &s))
- goto got_it;
- if (s >= strend)
- break;
- s += UTF8SKIP(s);
- };
- }
- else {
- do {
- if (regtry(®info, &s))
- goto got_it;
- } while (s++ < strend);
- }
- }
-
- /* Failure. */
- goto phooey;
-
-got_it:
- Safefree(swap);
- RX_MATCH_TAINTED_set(rx, PL_reg_flags & RF_tainted);
-
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (RXp_PAREN_NAMES(prog))
- (void)hv_iterinit(RXp_PAREN_NAMES(prog));
-
- /* make sure $`, $&, $', and $digit will work later */
- if ( !(flags & REXEC_NOT_FIRST) ) {
- RX_MATCH_COPY_FREE(rx);
- if (flags & REXEC_COPY_STR) {
- const I32 i = PL_regeol - startpos + (stringarg - strbeg);
-#ifdef PERL_OLD_COPY_ON_WRITE
- if ((SvIsCOW(sv)
- || (SvFLAGS(sv) & CAN_COW_MASK) == CAN_COW_FLAGS)) {
- if (DEBUG_C_TEST) {
- PerlIO_printf(Perl_debug_log,
- "Copy on write: regexp capture, type %d\n",
- (int) SvTYPE(sv));
- }
- prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv);
- prog->subbeg = (char *)SvPVX_const(prog->saved_copy);
- assert (SvPOKp(prog->saved_copy));
- } else
-#endif
- {
- RX_MATCH_COPIED_on(rx);
- s = savepvn(strbeg, i);
- prog->subbeg = s;
- }
- prog->sublen = i;
- }
- else {
- prog->subbeg = strbeg;
- prog->sublen = PL_regeol - strbeg; /* strend may have been modified */
- }
- }
-
- return 1;
-
-phooey:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n",
- PL_colors[4], PL_colors[5]));
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (swap) {
- /* we failed :-( roll it back */
- Safefree(prog->offs);
- prog->offs = swap;
- }
-
- return 0;
-}
-
-
-/*
- - regtry - try match at specific point
- */
-STATIC I32 /* 0 failure, 1 success */
-S_regtry(pTHX_ regmatch_info *reginfo, char **startpos)
-{
- dVAR;
- CHECKPOINT lastcp;
- REGEXP *const rx = reginfo->prog;
- regexp *const prog = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTRY;
-
- reginfo->cutpoint=NULL;
-
- if ((prog->extflags & RXf_EVAL_SEEN) && !PL_reg_eval_set) {
- MAGIC *mg;
-
- PL_reg_eval_set = RS_init;
- DEBUG_EXECUTE_r(DEBUG_s(
- PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n",
- (IV)(PL_stack_sp - PL_stack_base));
- ));
- SAVESTACK_CXPOS();
- cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base;
- /* Otherwise OP_NEXTSTATE will free whatever on stack now. */
- SAVETMPS;
- /* Apparently this is not needed, judging by wantarray. */
- /* SAVEI8(cxstack[cxstack_ix].blk_gimme);
- cxstack[cxstack_ix].blk_gimme = G_SCALAR; */
-
- if (reginfo->sv) {
- /* Make $_ available to executed code. */
- if (reginfo->sv != DEFSV) {
- SAVE_DEFSV;
- DEFSV_set(reginfo->sv);
- }
-
- if (!(SvTYPE(reginfo->sv) >= SVt_PVMG && SvMAGIC(reginfo->sv)
- && (mg = mg_find(reginfo->sv, PERL_MAGIC_regex_global)))) {
- /* prepare for quick setting of pos */
-#ifdef PERL_OLD_COPY_ON_WRITE
- if (SvIsCOW(reginfo->sv))
- sv_force_normal_flags(reginfo->sv, 0);
-#endif
- mg = sv_magicext(reginfo->sv, NULL, PERL_MAGIC_regex_global,
- &PL_vtbl_mglob, NULL, 0);
- mg->mg_len = -1;
- }
- PL_reg_magic = mg;
- PL_reg_oldpos = mg->mg_len;
- SAVEDESTRUCTOR_X(restore_pos, prog);
- }
- if (!PL_reg_curpm) {
- Newxz(PL_reg_curpm, 1, PMOP);
-#ifdef USE_ITHREADS
- {
- SV* const repointer = &PL_sv_undef;
- /* this regexp is also owned by the new PL_reg_curpm, which
- will try to free it. */
- av_push(PL_regex_padav, repointer);
- PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav);
- PL_regex_pad = AvARRAY(PL_regex_padav);
- }
-#endif
- }
-#ifdef USE_ITHREADS
- /* It seems that non-ithreads works both with and without this code.
- So for efficiency reasons it seems best not to have the code
- compiled when it is not needed. */
- /* This is safe against NULLs: */
- ReREFCNT_dec(PM_GETRE(PL_reg_curpm));
- /* PM_reg_curpm owns a reference to this regexp. */
- ReREFCNT_inc(rx);
-#endif
- PM_SETRE(PL_reg_curpm, rx);
- PL_reg_oldcurpm = PL_curpm;
- PL_curpm = PL_reg_curpm;
- if (RXp_MATCH_COPIED(prog)) {
- /* Here is a serious problem: we cannot rewrite subbeg,
- since it may be needed if this match fails. Thus
- $` inside (?{}) could fail... */
- PL_reg_oldsaved = prog->subbeg;
- PL_reg_oldsavedlen = prog->sublen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = prog->saved_copy;
-#endif
- RXp_MATCH_COPIED_off(prog);
- }
- else
- PL_reg_oldsaved = NULL;
- prog->subbeg = PL_bostr;
- prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */
- }
- DEBUG_EXECUTE_r(PL_reg_starttry = *startpos);
- prog->offs[0].start = *startpos - PL_bostr;
- PL_reginput = *startpos;
- PL_reglastparen = &prog->lastparen;
- PL_reglastcloseparen = &prog->lastcloseparen;
- prog->lastparen = 0;
- prog->lastcloseparen = 0;
- PL_regsize = 0;
- PL_regoffs = prog->offs;
- if (PL_reg_start_tmpl <= prog->nparens) {
- PL_reg_start_tmpl = prog->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- /* XXXX What this code is doing here?!!! There should be no need
- to do this again and again, PL_reglastparen should take care of
- this! --ilya*/
-
- /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code.
- * Actually, the code in regcppop() (which Ilya may be meaning by
- * PL_reglastparen), is not needed at all by the test suite
- * (op/regexp, op/pat, op/split), but that code is needed otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * Meanwhile, this code *is* needed for the
- * above-mentioned test suite tests to succeed. The common theme
- * on those tests seems to be returning null fields from matches.
- * --jhi updated by dapm */
-#if 1
- if (prog->nparens) {
- regexp_paren_pair *pp = PL_regoffs;
- register I32 i;
- for (i = prog->nparens; i > (I32)*PL_reglastparen; i--) {
- ++pp;
- pp->start = -1;
- pp->end = -1;
- }
- }
-#endif
- REGCP_SET(lastcp);
- if (regmatch(reginfo, progi->program + 1)) {
- PL_regoffs[0].end = PL_reginput - PL_bostr;
- return 1;
- }
- if (reginfo->cutpoint)
- *startpos= reginfo->cutpoint;
- REGCP_UNWIND(lastcp);
- return 0;
-}
-
-
-#define sayYES goto yes
-#define sayNO goto no
-#define sayNO_SILENT goto no_silent
-
-/* we dont use STMT_START/END here because it leads to
- "unreachable code" warnings, which are bogus, but distracting. */
-#define CACHEsayNO \
- if (ST.cache_mask) \
- PL_reg_poscache[ST.cache_offset] |= ST.cache_mask; \
- sayNO
-
-/* this is used to determine how far from the left messages like
- 'failed...' are printed. It should be set such that messages
- are inline with the regop output that created them.
-*/
-#define REPORT_CODE_OFF 32
-
-
-/* Make sure there is a test for this +1 options in re_tests */
-#define TRIE_INITAL_ACCEPT_BUFFLEN 4;
-
-#define CHRTEST_UNINIT -1001 /* c1/c2 haven't been calculated yet */
-#define CHRTEST_VOID -1000 /* the c1/c2 "next char" test should be skipped */
-
-#define SLAB_FIRST(s) (&(s)->states[0])
-#define SLAB_LAST(s) (&(s)->states[PERL_REGMATCH_SLAB_SLOTS-1])
-
-/* grab a new slab and return the first slot in it */
-
-STATIC regmatch_state *
-S_push_slab(pTHX)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- regmatch_slab *s = PL_regmatch_slab->next;
- if (!s) {
- Newx(s, 1, regmatch_slab);
- s->prev = PL_regmatch_slab;
- s->next = NULL;
- PL_regmatch_slab->next = s;
- }
- PL_regmatch_slab = s;
- return SLAB_FIRST(s);
-}
-
-
-/* push a new state then goto it */
-
-#define PUSH_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_state;
-
-/* push a new state with success backtracking, then goto it */
-
-#define PUSH_YES_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_yes_state;
-
-
-
-/*
-
-regmatch() - main matching routine
-
-This is basically one big switch statement in a loop. We execute an op,
-set 'next' to point the next op, and continue. If we come to a point which
-we may need to backtrack to on failure such as (A|B|C), we push a
-backtrack state onto the backtrack stack. On failure, we pop the top
-state, and re-enter the loop at the state indicated. If there are no more
-states to pop, we return failure.
-
-Sometimes we also need to backtrack on success; for example /A+/, where
-after successfully matching one A, we need to go back and try to
-match another one; similarly for lookahead assertions: if the assertion
-completes successfully, we backtrack to the state just before the assertion
-and then carry on. In these cases, the pushed state is marked as
-'backtrack on success too'. This marking is in fact done by a chain of
-pointers, each pointing to the previous 'yes' state. On success, we pop to
-the nearest yes state, discarding any intermediate failure-only states.
-Sometimes a yes state is pushed just to force some cleanup code to be
-called at the end of a successful match or submatch; e.g. (??{$re}) uses
-it to free the inner regex.
-
-Note that failure backtracking rewinds the cursor position, while
-success backtracking leaves it alone.
-
-A pattern is complete when the END op is executed, while a subpattern
-such as (?=foo) is complete when the SUCCESS op is executed. Both of these
-ops trigger the "pop to last yes state if any, otherwise return true"
-behaviour.
-
-A common convention in this function is to use A and B to refer to the two
-subpatterns (or to the first nodes thereof) in patterns like /A*B/: so A is
-the subpattern to be matched possibly multiple times, while B is the entire
-rest of the pattern. Variable and state names reflect this convention.
-
-The states in the main switch are the union of ops and failure/success of
-substates associated with with that op. For example, IFMATCH is the op
-that does lookahead assertions /(?=A)B/ and so the IFMATCH state means
-'execute IFMATCH'; while IFMATCH_A is a state saying that we have just
-successfully matched A and IFMATCH_A_fail is a state saying that we have
-just failed to match A. Resume states always come in pairs. The backtrack
-state we push is marked as 'IFMATCH_A', but when that is popped, we resume
-at IFMATCH_A or IFMATCH_A_fail, depending on whether we are backtracking
-on success or failure.
-
-The struct that holds a backtracking state is actually a big union, with
-one variant for each major type of op. The variable st points to the
-top-most backtrack struct. To make the code clearer, within each
-block of code we #define ST to alias the relevant union.
-
-Here's a concrete example of a (vastly oversimplified) IFMATCH
-implementation:
-
- switch (state) {
- ....
-
-#define ST st->u.ifmatch
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- ST.foo = ...; // some state we wish to save
- ...
- // push a yes backtrack state with a resume value of
- // IFMATCH_A/IFMATCH_A_fail, then continue execution at the
- // first node of A:
- PUSH_YES_STATE_GOTO(IFMATCH_A, A);
- // NOTREACHED
-
- case IFMATCH_A: // we have successfully executed A; now continue with B
- next = B;
- bar = ST.foo; // do something with the preserved value
- break;
-
- case IFMATCH_A_fail: // A failed, so the assertion failed
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
-
-#undef ST
-
- ...
- }
-
-For any old-timers reading this who are familiar with the old recursive
-approach, the code above is equivalent to:
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- {
- int foo = ...
- ...
- if (regmatch(A)) {
- next = B;
- bar = foo;
- break;
- }
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
- }
-
-The topmost backtrack state, pointed to by st, is usually free. If you
-want to claim it, populate any ST.foo fields in it with values you wish to
-save, then do one of
-
- PUSH_STATE_GOTO(resume_state, node);
- PUSH_YES_STATE_GOTO(resume_state, node);
-
-which sets that backtrack state's resume value to 'resume_state', pushes a
-new free entry to the top of the backtrack stack, then goes to 'node'.
-On backtracking, the free slot is popped, and the saved state becomes the
-new free state. An ST.foo field in this new top state can be temporarily
-accessed to retrieve values, but once the main loop is re-entered, it
-becomes available for reuse.
-
-Note that the depth of the backtrack stack constantly increases during the
-left-to-right execution of the pattern, rather than going up and down with
-the pattern nesting. For example the stack is at its maximum at Z at the
-end of the pattern, rather than at X in the following:
-
- /(((X)+)+)+....(Y)+....Z/
-
-The only exceptions to this are lookahead/behind assertions and the cut,
-(?>A), which pop all the backtrack states associated with A before
-continuing.
-
-Bascktrack state structs are allocated in slabs of about 4K in size.
-PL_regmatch_state and st always point to the currently active state,
-and PL_regmatch_slab points to the slab currently containing
-PL_regmatch_state. The first time regmatch() is called, the first slab is
-allocated, and is never freed until interpreter destruction. When the slab
-is full, a new one is allocated and chained to the end. At exit from
-regmatch(), slabs allocated since entry are freed.
-
-*/
-
-
-#define DEBUG_STATE_pp(pp) \
- DEBUG_STATE_r({ \
- DUMP_EXEC_POS(locinput, scan, do_utf8); \
- PerlIO_printf(Perl_debug_log, \
- " %*s"pp" %s%s%s%s%s\n", \
- depth*2, "", \
- PL_reg_name[st->resume_state], \
- ((st==yes_state||st==mark_state) ? "[" : ""), \
- ((st==yes_state) ? "Y" : ""), \
- ((st==mark_state) ? "M" : ""), \
- ((st==yes_state||st==mark_state) ? "]" : "") \
- ); \
- });
-
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-prog) : -1)
-
-#ifdef DEBUGGING
-
-STATIC void
-S_debug_start_match(pTHX_ const REGEXP *prog, const bool do_utf8,
- const char *start, const char *end, const char *blurb)
-{
- const bool utf8_pat = RX_UTF8(prog) ? 1 : 0;
-
- PERL_ARGS_ASSERT_DEBUG_START_MATCH;
-
- if (!PL_colorset)
- reginitcolors();
- {
- RE_PV_QUOTED_DECL(s0, utf8_pat, PERL_DEBUG_PAD_ZERO(0),
- RX_PRECOMP_const(prog), RX_PRELEN(prog), 60);
-
- RE_PV_QUOTED_DECL(s1, do_utf8, PERL_DEBUG_PAD_ZERO(1),
- start, end - start, 60);
-
- PerlIO_printf(Perl_debug_log,
- "%s%s REx%s %s against %s\n",
- PL_colors[4], blurb, PL_colors[5], s0, s1);
-
- if (do_utf8||utf8_pat)
- PerlIO_printf(Perl_debug_log, "UTF-8 %s%s%s...\n",
- utf8_pat ? "pattern" : "",
- utf8_pat && do_utf8 ? " and " : "",
- do_utf8 ? "string" : ""
- );
- }
-}
-
-STATIC void
-S_dump_exec_pos(pTHX_ const char *locinput,
- const regnode *scan,
- const char *loc_regeol,
- const char *loc_bostr,
- const char *loc_reg_starttry,
- const bool do_utf8)
-{
- const int docolor = *PL_colors[0] || *PL_colors[2] || *PL_colors[4];
- const int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */
- int l = (loc_regeol - locinput) > taill ? taill : (loc_regeol - locinput);
- /* The part of the string before starttry has one color
- (pref0_len chars), between starttry and current
- position another one (pref_len - pref0_len chars),
- after the current position the third one.
- We assume that pref0_len <= pref_len, otherwise we
- decrease pref0_len. */
- int pref_len = (locinput - loc_bostr) > (5 + taill) - l
- ? (5 + taill) - l : locinput - loc_bostr;
- int pref0_len;
-
- PERL_ARGS_ASSERT_DUMP_EXEC_POS;
-
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len)))
- pref_len++;
- pref0_len = pref_len - (locinput - loc_reg_starttry);
- if (l + pref_len < (5 + taill) && l < loc_regeol - locinput)
- l = ( loc_regeol - locinput > (5 + taill) - pref_len
- ? (5 + taill) - pref_len : loc_regeol - locinput);
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput + l)))
- l--;
- if (pref0_len < 0)
- pref0_len = 0;
- if (pref0_len > pref_len)
- pref0_len = pref_len;
- {
- const int is_uni = (do_utf8 && OP(scan) != CANY) ? 1 : 0;
-
- RE_PV_COLOR_DECL(s0,len0,is_uni,PERL_DEBUG_PAD(0),
- (locinput - pref_len),pref0_len, 60, 4, 5);
-
- RE_PV_COLOR_DECL(s1,len1,is_uni,PERL_DEBUG_PAD(1),
- (locinput - pref_len + pref0_len),
- pref_len - pref0_len, 60, 2, 3);
-
- RE_PV_COLOR_DECL(s2,len2,is_uni,PERL_DEBUG_PAD(2),
- locinput, loc_regeol - locinput, 10, 0, 1);
-
- const STRLEN tlen=len0+len1+len2;
- PerlIO_printf(Perl_debug_log,
- "%4"IVdf" <%.*s%.*s%s%.*s>%*s|",
- (IV)(locinput - loc_bostr),
- len0, s0,
- len1, s1,
- (docolor ? "" : "> <"),
- len2, s2,
- (int)(tlen > 19 ? 0 : 19 - tlen),
- "");
- }
-}
-
-#endif
-
-/* reg_check_named_buff_matched()
- * Checks to see if a named buffer has matched. The data array of
- * buffer numbers corresponding to the buffer is expected to reside
- * in the regexp->data->data array in the slot stored in the ARG() of
- * node involved. Note that this routine doesn't actually care about the
- * name, that information is not preserved from compilation to execution.
- * Returns the index of the leftmost defined buffer with the given name
- * or 0 if non of the buffers matched.
- */
-STATIC I32
-S_reg_check_named_buff_matched(pTHX_ const regexp *rex, const regnode *scan)
-{
- I32 n;
- RXi_GET_DECL(rex,rexi);
- SV *sv_dat= MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
-
- PERL_ARGS_ASSERT_REG_CHECK_NAMED_BUFF_MATCHED;
-
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- if ((I32)*PL_reglastparen >= nums[n] &&
- PL_regoffs[nums[n]].end != -1)
- {
- return nums[n];
- }
- }
- return 0;
-}
-
-
-/* free all slabs above current one - called during LEAVE_SCOPE */
-
-STATIC void
-S_clear_backtrack_stack(pTHX_ void *p)
-{
- regmatch_slab *s = PL_regmatch_slab->next;
- PERL_UNUSED_ARG(p);
-
- if (!s)
- return;
- PL_regmatch_slab->next = NULL;
- while (s) {
- regmatch_slab * const osl = s;
- s = s->next;
- Safefree(osl);
- }
-}
-
-
-#define SETREX(Re1,Re2) \
- if (PL_reg_eval_set) PM_SETRE((PL_reg_curpm), (Re2)); \
- Re1 = (Re2)
-
-STATIC I32 /* 0 failure, 1 success */
-S_regmatch(pTHX_ regmatch_info *reginfo, regnode *prog)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- dVAR;
- register const bool do_utf8 = PL_reg_match_utf8;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- REGEXP *rex_sv = reginfo->prog;
- regexp *rex = (struct regexp *)SvANY(rex_sv);
- RXi_GET_DECL(rex,rexi);
- I32 oldsave;
- /* the current state. This is a cached copy of PL_regmatch_state */
- register regmatch_state *st;
- /* cache heavy used fields of st in registers */
- register regnode *scan;
- register regnode *next;
- register U32 n = 0; /* general value; init to avoid compiler warning */
- register I32 ln = 0; /* len or last; init to avoid compiler warning */
- register char *locinput = PL_reginput;
- register I32 nextchr; /* is always set to UCHARAT(locinput) */
-
- bool result = 0; /* return value of S_regmatch */
- int depth = 0; /* depth of backtrack stack */
- U32 nochange_depth = 0; /* depth of GOSUB recursion with nochange */
- const U32 max_nochange_depth =
- (3 * rex->nparens > MAX_RECURSE_EVAL_NOCHANGE_DEPTH) ?
- 3 * rex->nparens : MAX_RECURSE_EVAL_NOCHANGE_DEPTH;
- regmatch_state *yes_state = NULL; /* state to pop to on success of
- subpattern */
- /* mark_state piggy backs on the yes_state logic so that when we unwind
- the stack on success we can update the mark_state as we go */
- regmatch_state *mark_state = NULL; /* last mark state we have seen */
- regmatch_state *cur_eval = NULL; /* most recent EVAL_AB state */
- struct regmatch_state *cur_curlyx = NULL; /* most recent curlyx */
- U32 state_num;
- bool no_final = 0; /* prevent failure from backtracking? */
- bool do_cutgroup = 0; /* no_final only until next branch/trie entry */
- char *startpoint = PL_reginput;
- SV *popmark = NULL; /* are we looking for a mark? */
- SV *sv_commit = NULL; /* last mark name seen in failure */
- SV *sv_yes_mark = NULL; /* last mark name we have seen
- during a successfull match */
- U32 lastopen = 0; /* last open we saw */
- bool has_cutgroup = RX_HAS_CUTGROUP(rex) ? 1 : 0;
- SV* const oreplsv = GvSV(PL_replgv);
- /* these three flags are set by various ops to signal information to
- * the very next op. They have a useful lifetime of exactly one loop
- * iteration, and are not preserved or restored by state pushes/pops
- */
- bool sw = 0; /* the condition value in (?(cond)a|b) */
- bool minmod = 0; /* the next "{n,m}" is a "{n,m}?" */
- int logical = 0; /* the following EVAL is:
- 0: (?{...})
- 1: (?(?{...})X|Y)
- 2: (??{...})
- or the following IFMATCH/UNLESSM is:
- false: plain (?=foo)
- true: used as a condition: (?(?=foo))
- */
-#ifdef DEBUGGING
- GET_RE_DEBUG_FLAGS_DECL;
-#endif
-
- PERL_ARGS_ASSERT_REGMATCH;
-
- DEBUG_OPTIMISE_r( DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,"regmatch start\n");
- }));
- /* on first ever call to regmatch, allocate first slab */
- if (!PL_regmatch_slab) {
- Newx(PL_regmatch_slab, 1, regmatch_slab);
- PL_regmatch_slab->prev = NULL;
- PL_regmatch_slab->next = NULL;
- PL_regmatch_state = SLAB_FIRST(PL_regmatch_slab);
- }
-
- oldsave = PL_savestack_ix;
- SAVEDESTRUCTOR_X(S_clear_backtrack_stack, NULL);
- SAVEVPTR(PL_regmatch_slab);
- SAVEVPTR(PL_regmatch_state);
-
- /* grab next free state slot */
- st = ++PL_regmatch_state;
- if (st > SLAB_LAST(PL_regmatch_slab))
- st = PL_regmatch_state = S_push_slab(aTHX);
-
- /* Note that nextchr is a byte even in UTF */
- nextchr = UCHARAT(locinput);
- scan = prog;
- while (scan != NULL) {
-
- DEBUG_EXECUTE_r( {
- SV * const prop = sv_newmortal();
- regnode *rnext=regnext(scan);
- DUMP_EXEC_POS( locinput, scan, do_utf8 );
- regprop(rex, prop, scan);
-
- PerlIO_printf(Perl_debug_log,
- "%3"IVdf":%*s%s(%"IVdf")\n",
- (IV)(scan - rexi->program), depth*2, "",
- SvPVX_const(prop),
- (PL_regkind[OP(scan)] == END || !rnext) ?
- 0 : (IV)(rnext - rexi->program));
- });
-
- next = scan + NEXT_OFF(scan);
- if (next == scan)
- next = NULL;
- state_num = OP(scan);
-
- REH_CALL_EXEC_NODE_HOOK(rex, scan, reginfo, st);
- reenter_switch:
-
- assert(PL_reglastparen == &rex->lastparen);
- assert(PL_reglastcloseparen == &rex->lastcloseparen);
- assert(PL_regoffs == rex->offs);
-
- switch (state_num) {
- case BOL:
- if (locinput == PL_bostr)
- {
- /* reginfo->till = reginfo->bol; */
- break;
- }
- sayNO;
- case MBOL:
- if (locinput == PL_bostr ||
- ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n'))
- {
- break;
- }
- sayNO;
- case SBOL:
- if (locinput == PL_bostr)
- break;
- sayNO;
- case GPOS:
- if (locinput == reginfo->ganch)
- break;
- sayNO;
-
- case KEEPS:
- /* update the startpoint */
- st->u.keeper.val = PL_regoffs[0].start;
- PL_reginput = locinput;
- PL_regoffs[0].start = locinput - PL_bostr;
- PUSH_STATE_GOTO(KEEPS_next, next);
- /*NOT-REACHED*/
- case KEEPS_next_fail:
- /* rollback the start point change */
- PL_regoffs[0].start = st->u.keeper.val;
- sayNO_SILENT;
- /*NOT-REACHED*/
- case EOL:
- goto seol;
- case MEOL:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- break;
- case SEOL:
- seol:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- if (PL_regeol - locinput > 1)
- sayNO;
- break;
- case EOS:
- if (PL_regeol != locinput)
- sayNO;
- break;
- case SANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
- case CANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case REG_ANY:
- if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n')
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
-
-#undef ST
-#define ST st->u.trie
- case TRIEC:
- /* In this case the charclass data is available inline so
- we can fail fast without a lot of extra overhead.
- */
- if (scan->flags == EXACT || !do_utf8) {
- if(!ANYOF_BITMAP_TEST(scan, *locinput)) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case TRIE:
- {
- /* what type of TRIE am I? (utf8 makes this contextual) */
- DECL_TRIE_TYPE(scan);
-
- /* what trie are we using right now */
- reg_trie_data * const trie
- = (reg_trie_data*)rexi->data->data[ ARG( scan ) ];
- HV * widecharmap = MUTABLE_HV(rexi->data->data[ ARG( scan ) + 1 ]);
- U32 state = trie->startstate;
-
- if (trie->bitmap && trie_type != trie_utf8_fold &&
- !TRIE_BITMAP_TEST(trie,*locinput)
- ) {
- if (trie->states[ state ].wordnum) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %smatched empty string...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- break;
- } else {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- }
- }
-
- {
- U8 *uc = ( U8* )locinput;
-
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- STRLEN bufflen=0;
- SV *sv_accept_buff = NULL;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- ST.accepted = 0; /* how many accepting states we have seen */
- ST.B = next;
- ST.jump = trie->jump;
- ST.me = scan;
- /*
- traverse the TRIE keeping track of all accepting states
- we transition through until we get to a failing node.
- */
-
- while ( state && uc <= (U8*)PL_regeol ) {
- U32 base = trie->states[ state ].trans.base;
- UV uvc = 0;
- U16 charid;
- /* We use charid to hold the wordnum as we don't use it
- for charid until after we have done the wordnum logic.
- We define an alias just so that the wordnum logic reads
- more naturally. */
-
-#define got_wordnum charid
- got_wordnum = trie->states[ state ].wordnum;
-
- if ( got_wordnum ) {
- if ( ! ST.accepted ) {
- ENTER;
- SAVETMPS; /* XXX is this necessary? dmq */
- bufflen = TRIE_INITAL_ACCEPT_BUFFLEN;
- sv_accept_buff=newSV(bufflen *
- sizeof(reg_trie_accepted) - 1);
- SvCUR_set(sv_accept_buff, 0);
- SvPOK_on(sv_accept_buff);
- sv_2mortal(sv_accept_buff);
- SAVETMPS;
- ST.accept_buff =
- (reg_trie_accepted*)SvPV_nolen(sv_accept_buff );
- }
- do {
- if (ST.accepted >= bufflen) {
- bufflen *= 2;
- ST.accept_buff =(reg_trie_accepted*)
- SvGROW(sv_accept_buff,
- bufflen * sizeof(reg_trie_accepted));
- }
- SvCUR_set(sv_accept_buff,SvCUR(sv_accept_buff)
- + sizeof(reg_trie_accepted));
-
-
- ST.accept_buff[ST.accepted].wordnum = got_wordnum;
- ST.accept_buff[ST.accepted].endpos = uc;
- ++ST.accepted;
- } while (trie->nextword && (got_wordnum= trie->nextword[got_wordnum]));
- }
-#undef got_wordnum
-
- DEBUG_TRIE_EXECUTE_r({
- DUMP_EXEC_POS( (char *)uc, scan, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%*s %sState: %4"UVxf" Accepted: %4"UVxf" ",
- 2+depth * 2, "", PL_colors[4],
- (UV)state, (UV)ST.accepted );
- });
-
- if ( base ) {
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
-
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state)
- {
- state = trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next;
- }
- else {
- state = 0;
- }
- uc += len;
-
- }
- else {
- state = 0;
- }
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "Charid:%3x CP:%4"UVxf" After State: %4"UVxf"%s\n",
- charid, uvc, (UV)state, PL_colors[5] );
- );
- }
- if (!ST.accepted )
- sayNO;
-
- DEBUG_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" possible matches%s\n",
- REPORT_CODE_OFF + depth * 2, "",
- PL_colors[4], (IV)ST.accepted, PL_colors[5] );
- );
- }}
- goto trie_first_try; /* jump into the fail handler */
- /* NOTREACHED */
- case TRIE_next_fail: /* we failed - try next alterative */
- if ( ST.jump) {
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- }
- trie_first_try:
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
-
- if ( ST.jump) {
- ST.lastparen = *PL_reglastparen;
- REGCP_SET(ST.cp);
- }
- if ( ST.accepted == 1 ) {
- /* only one choice left - just continue */
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ 0 ].wordnum-1, 0 );
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %sonly one match left: #%d <%s>%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[ 0 ].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- )
- : "not compiled under -Dr",
- PL_colors[5] );
- });
- PL_reginput = (char *)ST.accept_buff[ 0 ].endpos;
- /* in this case we free tmps/leave before we call regmatch
- as we wont be using accept_buff again. */
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- if ( !ST.jump || !ST.jump[ST.accept_buff[0].wordnum])
- scan = ST.B;
- else
- scan = ST.me + ST.jump[ST.accept_buff[0].wordnum];
- if (!has_cutgroup) {
- FREETMPS;
- LEAVE;
- } else {
- ST.accepted--;
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- }
-
- continue; /* execute rest of RE */
- }
-
- if ( !ST.accepted-- ) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sTRIE failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- FREETMPS;
- LEAVE;
- sayNO_SILENT;
- /*NOTREACHED*/
- }
-
- /*
- There are at least two accepting states left. Presumably
- the number of accepting states is going to be low,
- typically two. So we simply scan through to find the one
- with lowest wordnum. Once we find it, we swap the last
- state into its place and decrement the size. We then try to
- match the rest of the pattern at the point where the word
- ends. If we succeed, control just continues along the
- regex; if we fail we return here to try the next accepting
- state
- */
-
- {
- U32 best = 0;
- U32 cur;
- for( cur = 1 ; cur <= ST.accepted ; cur++ ) {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" (%d) as best, looking at %"IVdf" (%d)%s\n",
- REPORT_CODE_OFF + depth * 2, "", PL_colors[4],
- (IV)best, ST.accept_buff[ best ].wordnum, (IV)cur,
- ST.accept_buff[ cur ].wordnum, PL_colors[5] );
- );
-
- if (ST.accept_buff[cur].wordnum <
- ST.accept_buff[best].wordnum)
- best = cur;
- }
-
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ best ].wordnum - 1, 0 );
- regnode *nextop=(!ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) ?
- ST.B :
- ST.me + ST.jump[ST.accept_buff[best].wordnum];
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %strying alternation #%d <%s> at node #%d %s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[best].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- ) : "not compiled under -Dr",
- REG_NODE_NUM(nextop),
- PL_colors[5] );
- });
-
- if ( best<ST.accepted ) {
- reg_trie_accepted tmp = ST.accept_buff[ best ];
- ST.accept_buff[ best ] = ST.accept_buff[ ST.accepted ];
- ST.accept_buff[ ST.accepted ] = tmp;
- best = ST.accepted;
- }
- PL_reginput = (char *)ST.accept_buff[ best ].endpos;
- if ( !ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) {
- scan = ST.B;
- } else {
- scan = ST.me + ST.jump[ST.accept_buff[best].wordnum];
- }
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- /* NOTREACHED */
- }
- /* NOTREACHED */
- case TRIE_next:
- /* we dont want to throw this away, see bug 57042*/
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- FREETMPS;
- LEAVE;
- sayYES;
-#undef ST
-
- case EXACT: {
- char *s = STRING(scan);
- ln = STR_LEN(scan);
- if (do_utf8 != UTF) {
- /* The target and the pattern have differing utf8ness. */
- char *l = locinput;
- const char * const e = s + ln;
-
- if (do_utf8) {
- /* The target is utf8, the pattern is not utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*(U8*)s) !=
- utf8n_to_uvuni((U8*)l, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- l += ulen;
- s ++;
- }
- }
- else {
- /* The target is not utf8, the pattern is utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*((U8*)l)) !=
- utf8n_to_uvuni((U8*)s, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- s += ulen;
- l ++;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
- /* The target and the pattern have the same utf8ness. */
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr)
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && memNE(s, locinput, ln))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case EXACTFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case EXACTF: {
- char * const s = STRING(scan);
- ln = STR_LEN(scan);
-
- if (do_utf8 || UTF) {
- /* Either target or the pattern are utf8. */
- const char * const l = locinput;
- char *e = PL_regeol;
-
- if (ibcmp_utf8(s, 0, ln, (bool)UTF,
- l, &e, 0, do_utf8)) {
- /* One more case for the sharp s:
- * pack("U0U*", 0xDF) =~ /ss/i,
- * the 0xC3 0x9F are the UTF-8
- * byte sequence for the U+00DF. */
-
- if (!(do_utf8 &&
- toLOWER(s[0]) == 's' &&
- ln >= 2 &&
- toLOWER(s[1]) == 's' &&
- (U8)l[0] == 0xC3 &&
- e - l >= 2 &&
- (U8)l[1] == 0x9F))
- sayNO;
- }
- locinput = e;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Neither the target and the pattern are utf8. */
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- UCHARAT(s) != ((OP(scan) == EXACTF)
- ? PL_fold : PL_fold_locale)[nextchr])
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && (OP(scan) == EXACTF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln)))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case ANYOF:
- if (do_utf8) {
- STRLEN inclasslen = PL_regeol - locinput;
-
- if (!reginclass(rex, scan, (U8*)locinput, &inclasslen, do_utf8))
- goto anyof_fail;
- if (locinput >= PL_regeol)
- sayNO;
- locinput += inclasslen ? inclasslen : UTF8SKIP(locinput);
- nextchr = UCHARAT(locinput);
- break;
- }
- else {
- if (nextchr < 0)
- nextchr = UCHARAT(locinput);
- if (!REGINCLASS(rex, scan, (U8*)locinput))
- goto anyof_fail;
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- }
- anyof_fail:
- /* If we might have the case of the German sharp s
- * in a casefolding Unicode character class. */
-
- if (ANYOF_FOLD_SHARP_S(scan, locinput, PL_regeol)) {
- locinput += SHARP_S_SKIP;
- nextchr = UCHARAT(locinput);
- }
- else
- sayNO;
- break;
- case ALNUML:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case ALNUM:
- if (!nextchr)
- sayNO;
- if (do_utf8) {
- LOAD_UTF8_CHARCLASS_ALNUM();
- if (!(OP(scan) == ALNUM
- ? (bool)swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8)
- : isALNUM_LC_utf8((U8*)locinput)))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (!(OP(scan) == ALNUM
- ? isALNUM(nextchr) : isALNUM_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NALNUML:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NALNUM:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- LOAD_UTF8_CHARCLASS_ALNUM();
- if (OP(scan) == NALNUM
- ? (bool)swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8)
- : isALNUM_LC_utf8((U8*)locinput))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (OP(scan) == NALNUM
- ? isALNUM(nextchr) : isALNUM_LC(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case BOUNDL:
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- case NBOUND:
- /* was last char in word? */
- if (do_utf8) {
- if (locinput == PL_bostr)
- ln = '\n';
- else {
- const U8 * const r = reghop3((U8*)locinput, -1, (U8*)PL_bostr);
-
- ln = utf8n_to_uvchr(r, UTF8SKIP(r), 0, uniflags);
- }
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM_uni(ln);
- LOAD_UTF8_CHARCLASS_ALNUM();
- n = swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8);
- }
- else {
- ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln));
- n = isALNUM_LC_utf8((U8*)locinput);
- }
- }
- else {
- ln = (locinput != PL_bostr) ?
- UCHARAT(locinput - 1) : '\n';
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM(ln);
- n = isALNUM(nextchr);
- }
- else {
- ln = isALNUM_LC(ln);
- n = isALNUM_LC(nextchr);
- }
- }
- if (((!ln) == (!n)) == (OP(scan) == BOUND ||
- OP(scan) == BOUNDL))
- sayNO;
- break;
- case SPACEL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case SPACE:
- if (!nextchr)
- sayNO;
- if (do_utf8) {
- if (UTF8_IS_CONTINUED(nextchr)) {
- LOAD_UTF8_CHARCLASS_SPACE();
- if (!(OP(scan) == SPACE
- ? (bool)swash_fetch(PL_utf8_space, (U8*)locinput, do_utf8)
- : isSPACE_LC_utf8((U8*)locinput)))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (!(OP(scan) == SPACE
- ? isSPACE(nextchr) : isSPACE_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- }
- else {
- if (!(OP(scan) == SPACE
- ? isSPACE(nextchr) : isSPACE_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- }
- break;
- case NSPACEL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NSPACE:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- LOAD_UTF8_CHARCLASS_SPACE();
- if (OP(scan) == NSPACE
- ? (bool)swash_fetch(PL_utf8_space, (U8*)locinput, do_utf8)
- : isSPACE_LC_utf8((U8*)locinput))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (OP(scan) == NSPACE
- ? isSPACE(nextchr) : isSPACE_LC(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case DIGITL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case DIGIT:
- if (!nextchr)
- sayNO;
- if (do_utf8) {
- LOAD_UTF8_CHARCLASS_DIGIT();
- if (!(OP(scan) == DIGIT
- ? (bool)swash_fetch(PL_utf8_digit, (U8*)locinput, do_utf8)
- : isDIGIT_LC_utf8((U8*)locinput)))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (!(OP(scan) == DIGIT
- ? isDIGIT(nextchr) : isDIGIT_LC(nextchr)))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case NDIGITL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NDIGIT:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- LOAD_UTF8_CHARCLASS_DIGIT();
- if (OP(scan) == NDIGIT
- ? (bool)swash_fetch(PL_utf8_digit, (U8*)locinput, do_utf8)
- : isDIGIT_LC_utf8((U8*)locinput))
- {
- sayNO;
- }
- locinput += PL_utf8skip[nextchr];
- nextchr = UCHARAT(locinput);
- break;
- }
- if (OP(scan) == NDIGIT
- ? isDIGIT(nextchr) : isDIGIT_LC(nextchr))
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case CLUMP:
- if (locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- LOAD_UTF8_CHARCLASS_MARK();
- if (swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8))
- sayNO;
- locinput += PL_utf8skip[nextchr];
- while (locinput < PL_regeol &&
- swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8))
- locinput += UTF8SKIP(locinput);
- if (locinput > PL_regeol)
- sayNO;
- }
- else
- locinput++;
- nextchr = UCHARAT(locinput);
- break;
-
- case NREFFL:
- {
- char *s;
- char type;
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NREF:
- case NREFF:
- type = OP(scan);
- n = reg_check_named_buff_matched(rex,scan);
-
- if ( n ) {
- type = REF + ( type - NREF );
- goto do_ref;
- } else {
- sayNO;
- }
- /* unreached */
- case REFFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case REF:
- case REFF:
- n = ARG(scan); /* which paren pair */
- type = OP(scan);
- do_ref:
- ln = PL_regoffs[n].start;
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (*PL_reglastparen < n || ln == -1)
- sayNO; /* Do not match unless seen CLOSEn. */
- if (ln == PL_regoffs[n].end)
- break;
-
- s = PL_bostr + ln;
- if (do_utf8 && type != REF) { /* REF can do byte comparison */
- char *l = locinput;
- const char *e = PL_bostr + PL_regoffs[n].end;
- /*
- * Note that we can't do the "other character" lookup trick as
- * in the 8-bit case (no pun intended) because in Unicode we
- * have to map both upper and title case to lower case.
- */
- if (type == REFF) {
- while (s < e) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- if (l >= PL_regeol)
- sayNO;
- toLOWER_utf8((U8*)s, tmpbuf1, &ulen1);
- toLOWER_utf8((U8*)l, tmpbuf2, &ulen2);
- if (ulen1 != ulen2 || memNE((char *)tmpbuf1, (char *)tmpbuf2, ulen1))
- sayNO;
- s += ulen1;
- l += ulen2;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- (type == REF ||
- (UCHARAT(s) != (type == REFF
- ? PL_fold : PL_fold_locale)[nextchr])))
- sayNO;
- ln = PL_regoffs[n].end - ln;
- if (locinput + ln > PL_regeol)
- sayNO;
- if (ln > 1 && (type == REF
- ? memNE(s, locinput, ln)
- : (type == REFF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln))))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case NOTHING:
- case TAIL:
- break;
- case BACK:
- break;
-
-#undef ST
-#define ST st->u.eval
- {
- SV *ret;
- REGEXP *re_sv;
- regexp *re;
- regexp_internal *rei;
- regnode *startpoint;
-
- case GOSTART:
- case GOSUB: /* /(...(?1))/ /(...(?&foo))/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if (cur_eval->u.eval.close_paren == (U32)ARG(scan))
- Perl_croak(aTHX_ "Infinite recursion in regex");
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_
- "Pattern subroutine nesting without pos change"
- " exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- re_sv = rex_sv;
- re = rex;
- rei = rexi;
- (void)ReREFCNT_inc(rex_sv);
- if (OP(scan)==GOSUB) {
- startpoint = scan + ARG2L(scan);
- ST.close_paren = ARG(scan);
- } else {
- startpoint = rei->program+1;
- ST.close_paren = 0;
- }
- goto eval_recurse_doit;
- /* NOTREACHED */
- case EVAL: /* /(?{A})B/ /(??{A})B/ and /(?(?{A})X|Y)B/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_ "EVAL without pos change exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- {
- /* execute the code in the {...} */
- dSP;
- SV ** const before = SP;
- OP_4tree * const oop = PL_op;
- COP * const ocurcop = PL_curcop;
- PAD *old_comppad;
- char *saved_regeol = PL_regeol;
-
- n = ARG(scan);
- PL_op = (OP_4tree*)rexi->data->data[n];
- DEBUG_STATE_r( PerlIO_printf(Perl_debug_log,
- " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) );
- PAD_SAVE_LOCAL(old_comppad, (PAD*)rexi->data->data[n + 2]);
- PL_regoffs[0].end = PL_reg_magic->mg_len = locinput - PL_bostr;
-
- if (sv_yes_mark) {
- SV *sv_mrk = get_sv("REGMARK", 1);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- CALLRUNOPS(aTHX); /* Scalar context. */
- SPAGAIN;
- if (SP == before)
- ret = &PL_sv_undef; /* protect against empty (?{}) blocks. */
- else {
- ret = POPs;
- PUTBACK;
- }
-
- PL_op = oop;
- PAD_RESTORE_LOCAL(old_comppad);
- PL_curcop = ocurcop;
- PL_regeol = saved_regeol;
- if (!logical) {
- /* /(?{...})/ */
- sv_setsv(save_scalar(PL_replgv), ret);
- break;
- }
- }
- if (logical == 2) { /* Postponed subexpression: /(??{...})/ */
- logical = 0;
- {
- /* extract RE object from returned value; compiling if
- * necessary */
- MAGIC *mg = NULL;
- REGEXP *rx = NULL;
-
- if (SvROK(ret)) {
- SV *const sv = SvRV(ret);
-
- if (SvTYPE(sv) == SVt_REGEXP) {
- rx = (REGEXP*) sv;
- } else if (SvSMAGICAL(sv)) {
- mg = mg_find(sv, PERL_MAGIC_qr);
- assert(mg);
- }
- } else if (SvTYPE(ret) == SVt_REGEXP) {
- rx = (REGEXP*) ret;
- } else if (SvSMAGICAL(ret)) {
- if (SvGMAGICAL(ret)) {
- /* I don't believe that there is ever qr magic
- here. */
- assert(!mg_find(ret, PERL_MAGIC_qr));
- sv_unmagic(ret, PERL_MAGIC_qr);
- }
- else {
- mg = mg_find(ret, PERL_MAGIC_qr);
- /* testing suggests mg only ends up non-NULL for
- scalars who were upgraded and compiled in the
- else block below. In turn, this is only
- triggered in the "postponed utf8 string" tests
- in t/op/pat.t */
- }
- }
-
- if (mg) {
- rx = (REGEXP *) mg->mg_obj; /*XXX:dmq*/
- assert(rx);
- }
- if (rx) {
- rx = reg_temp_copy(rx);
- }
- else {
- U32 pm_flags = 0;
- const I32 osize = PL_regsize;
-
- if (DO_UTF8(ret)) {
- assert (SvUTF8(ret));
- } else if (SvUTF8(ret)) {
- /* Not doing UTF-8, despite what the SV says. Is
- this only if we're trapped in use 'bytes'? */
- /* Make a copy of the octet sequence, but without
- the flag on, as the compiler now honours the
- SvUTF8 flag on ret. */
- STRLEN len;
- const char *const p = SvPV(ret, len);
- ret = newSVpvn_flags(p, len, SVs_TEMP);
- }
- rx = CALLREGCOMP(ret, pm_flags);
- if (!(SvFLAGS(ret)
- & (SVs_TEMP | SVs_PADTMP | SVf_READONLY
- | SVs_GMG))) {
- /* This isn't a first class regexp. Instead, it's
- caching a regexp onto an existing, Perl visible
- scalar. */
- sv_magic(ret, MUTABLE_SV(rx), PERL_MAGIC_qr, 0, 0);
- }
- PL_regsize = osize;
- }
- re_sv = rx;
- re = (struct regexp *)SvANY(rx);
- }
- RXp_MATCH_COPIED_off(re);
- re->subbeg = rex->subbeg;
- re->sublen = rex->sublen;
- rei = RXi_GET(re);
- DEBUG_EXECUTE_r(
- debug_start_match(re_sv, do_utf8, locinput, PL_regeol,
- "Matching embedded");
- );
- startpoint = rei->program + 1;
- ST.close_paren = 0; /* only used for GOSUB */
- /* borrowed from regtry */
- if (PL_reg_start_tmpl <= re->nparens) {
- PL_reg_start_tmpl = re->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- eval_recurse_doit: /* Share code with GOSUB below this line */
- /* run the pattern returned from (??{...}) */
- ST.cp = regcppush(0); /* Save *all* the positions. */
- REGCP_SET(ST.lastcp);
-
- PL_regoffs = re->offs; /* essentially NOOP on GOSUB */
-
- /* see regtry, specifically PL_reglast(?:close)?paren is a pointer! (i dont know why) :dmq */
- PL_reglastparen = &re->lastparen;
- PL_reglastcloseparen = &re->lastcloseparen;
- re->lastparen = 0;
- re->lastcloseparen = 0;
-
- PL_reginput = locinput;
- PL_regsize = 0;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
-
- ST.toggle_reg_flags = PL_reg_flags;
- if (RX_UTF8(re_sv))
- PL_reg_flags |= RF_utf8;
- else
- PL_reg_flags &= ~RF_utf8;
- ST.toggle_reg_flags ^= PL_reg_flags; /* diff of old and new */
-
- ST.prev_rex = rex_sv;
- ST.prev_curlyx = cur_curlyx;
- SETREX(rex_sv,re_sv);
- rex = re;
- rexi = rei;
- cur_curlyx = NULL;
- ST.B = next;
- ST.prev_eval = cur_eval;
- cur_eval = st;
- /* now continue from first node in postoned RE */
- PUSH_YES_STATE_GOTO(EVAL_AB, startpoint);
- /* NOTREACHED */
- }
- /* logical is 1, /(?(?{...})X|Y)/ */
- sw = (bool)SvTRUE(ret);
- logical = 0;
- break;
- }
-
- case EVAL_AB: /* cleanup after a successful (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- regcpblow(ST.cp);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
- /* also update PL_regoffs */
- PL_regoffs = rex->offs;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayYES;
-
-
- case EVAL_AB_fail: /* unsuccessfully ran A or B in (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- PL_reginput = locinput;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayNO_SILENT;
-#undef ST
-
- case OPEN:
- n = ARG(scan); /* which paren pair */
- PL_reg_start_tmp[n] = locinput;
- if (n > PL_regsize)
- PL_regsize = n;
- lastopen = n;
- break;
- case CLOSE:
- n = ARG(scan); /* which paren pair */
- PL_regoffs[n].start = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if (cur_eval && cur_eval->u.eval.close_paren == n) {
- goto fake_end;
- }
- break;
- case ACCEPT:
- if (ARG(scan)){
- regnode *cursor;
- for (cursor=scan;
- cursor && OP(cursor)!=END;
- cursor=regnext(cursor))
- {
- if ( OP(cursor)==CLOSE ){
- n = ARG(cursor);
- if ( n <= lastopen ) {
- PL_regoffs[n].start
- = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if ( n == ARG(scan) || (cur_eval &&
- cur_eval->u.eval.close_paren == n))
- break;
- }
- }
- }
- }
- goto fake_end;
- /*NOTREACHED*/
- case GROUPP:
- n = ARG(scan); /* which paren pair */
- sw = (bool)(*PL_reglastparen >= n && PL_regoffs[n].end != -1);
- break;
- case NGROUPP:
- /* reg_check_named_buff_matched returns 0 for no match */
- sw = (bool)(0 < reg_check_named_buff_matched(rex,scan));
- break;
- case INSUBP:
- n = ARG(scan);
- sw = (cur_eval && (!n || cur_eval->u.eval.close_paren == n));
- break;
- case DEFINEP:
- sw = 0;
- break;
- case IFTHEN:
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (sw)
- next = NEXTOPER(NEXTOPER(scan));
- else {
- next = scan + ARG(scan);
- if (OP(next) == IFTHEN) /* Fake one. */
- next = NEXTOPER(NEXTOPER(next));
- }
- break;
- case LOGICAL:
- logical = scan->flags;
- break;
-
-/*******************************************************************
-
-The CURLYX/WHILEM pair of ops handle the most generic case of the /A*B/
-pattern, where A and B are subpatterns. (For simple A, CURLYM or
-STAR/PLUS/CURLY/CURLYN are used instead.)
-
-A*B is compiled as <CURLYX><A><WHILEM><B>
-
-On entry to the subpattern, CURLYX is called. This pushes a CURLYX
-state, which contains the current count, initialised to -1. It also sets
-cur_curlyx to point to this state, with any previous value saved in the
-state block.
-
-CURLYX then jumps straight to the WHILEM op, rather than executing A,
-since the pattern may possibly match zero times (i.e. it's a while {} loop
-rather than a do {} while loop).
-
-Each entry to WHILEM represents a successful match of A. The count in the
-CURLYX block is incremented, another WHILEM state is pushed, and execution
-passes to A or B depending on greediness and the current count.
-
-For example, if matching against the string a1a2a3b (where the aN are
-substrings that match /A/), then the match progresses as follows: (the
-pushed states are interspersed with the bits of strings matched so far):
-
- <CURLYX cnt=-1>
- <CURLYX cnt=0><WHILEM>
- <CURLYX cnt=1><WHILEM> a1 <WHILEM>
- <CURLYX cnt=2><WHILEM> a1 <WHILEM> a2 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> b
-
-(Contrast this with something like CURLYM, which maintains only a single
-backtrack state:
-
- <CURLYM cnt=0> a1
- a1 <CURLYM cnt=1> a2
- a1 a2 <CURLYM cnt=2> a3
- a1 a2 a3 <CURLYM cnt=3> b
-)
-
-Each WHILEM state block marks a point to backtrack to upon partial failure
-of A or B, and also contains some minor state data related to that
-iteration. The CURLYX block, pointed to by cur_curlyx, contains the
-overall state, such as the count, and pointers to the A and B ops.
-
-This is complicated slightly by nested CURLYX/WHILEM's. Since cur_curlyx
-must always point to the *current* CURLYX block, the rules are:
-
-When executing CURLYX, save the old cur_curlyx in the CURLYX state block,
-and set cur_curlyx to point the new block.
-
-When popping the CURLYX block after a successful or unsuccessful match,
-restore the previous cur_curlyx.
-
-When WHILEM is about to execute B, save the current cur_curlyx, and set it
-to the outer one saved in the CURLYX block.
-
-When popping the WHILEM block after a successful or unsuccessful B match,
-restore the previous cur_curlyx.
-
-Here's an example for the pattern (AI* BI)*BO
-I and O refer to inner and outer, C and W refer to CURLYX and WHILEM:
-
-cur_
-curlyx backtrack stack
------- ---------------
-NULL
-CO <CO prev=NULL> <WO>
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-NULL <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi <WO prev=CO> bo
-
-At this point the pattern succeeds, and we work back down the stack to
-clean up, restoring as we go:
-
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO>
-NULL
-
-*******************************************************************/
-
-#define ST st->u.curlyx
-
- case CURLYX: /* start of /A*B/ (for complex A) */
- {
- /* No need to save/restore up to this paren */
- I32 parenfloor = scan->flags;
-
- assert(next); /* keep Coverity happy */
- if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */
- next += ARG(next);
-
- /* XXXX Probably it is better to teach regpush to support
- parenfloor > PL_regsize... */
- if (parenfloor > (I32)*PL_reglastparen)
- parenfloor = *PL_reglastparen; /* Pessimization... */
-
- ST.prev_curlyx= cur_curlyx;
- cur_curlyx = st;
- ST.cp = PL_savestack_ix;
-
- /* these fields contain the state of the current curly.
- * they are accessed by subsequent WHILEMs */
- ST.parenfloor = parenfloor;
- ST.min = ARG1(scan);
- ST.max = ARG2(scan);
- ST.A = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- ST.B = next;
- ST.minmod = minmod;
- minmod = 0;
- ST.count = -1; /* this will be updated by WHILEM */
- ST.lastloc = NULL; /* this will be updated by WHILEM */
-
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYX_end, PREVOPER(next));
- /* NOTREACHED */
- }
-
- case CURLYX_end: /* just finished matching all of A*B */
- cur_curlyx = ST.prev_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case CURLYX_end_fail: /* just failed to match all of A*B */
- regcpblow(ST.cp);
- cur_curlyx = ST.prev_curlyx;
- sayNO;
- /* NOTREACHED */
-
-
-#undef ST
-#define ST st->u.whilem
-
- case WHILEM: /* just matched an A in /A*B/ (for complex A) */
- {
- /* see the discussion above about CURLYX/WHILEM */
- I32 n;
- assert(cur_curlyx); /* keep Coverity happy */
- n = ++cur_curlyx->u.curlyx.count; /* how many A's matched */
- ST.save_lastloc = cur_curlyx->u.curlyx.lastloc;
- ST.cache_offset = 0;
- ST.cache_mask = 0;
-
- PL_reginput = locinput;
-
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: matched %ld out of %ld..%ld\n",
- REPORT_CODE_OFF+depth*2, "", (long)n,
- (long)cur_curlyx->u.curlyx.min,
- (long)cur_curlyx->u.curlyx.max)
- );
-
- /* First just match a string of min A's. */
-
- if (n < cur_curlyx->u.curlyx.min) {
- cur_curlyx->u.curlyx.lastloc = locinput;
- PUSH_STATE_GOTO(WHILEM_A_pre, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
-
- /* If degenerate A matches "", assume A done. */
-
- if (locinput == cur_curlyx->u.curlyx.lastloc) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: empty match detected, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- goto do_whilem_B_max;
- }
-
- /* super-linear cache processing */
-
- if (scan->flags) {
-
- if (!PL_reg_maxiter) {
- /* start the countdown: Postpone detection until we
- * know the match is not *that* much linear. */
- PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4);
- /* possible overflow for long strings and many CURLYX's */
- if (PL_reg_maxiter < 0)
- PL_reg_maxiter = I32_MAX;
- PL_reg_leftiter = PL_reg_maxiter;
- }
-
- if (PL_reg_leftiter-- == 0) {
- /* initialise cache */
- const I32 size = (PL_reg_maxiter + 7)/8;
- if (PL_reg_poscache) {
- if ((I32)PL_reg_poscache_size < size) {
- Renew(PL_reg_poscache, size, char);
- PL_reg_poscache_size = size;
- }
- Zero(PL_reg_poscache, size, char);
- }
- else {
- PL_reg_poscache_size = size;
- Newxz(PL_reg_poscache, size, char);
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%swhilem: Detected a super-linear match, switching on caching%s...\n",
- PL_colors[4], PL_colors[5])
- );
- }
-
- if (PL_reg_leftiter < 0) {
- /* have we already failed at this position? */
- I32 offset, mask;
- offset = (scan->flags & 0xf) - 1
- + (locinput - PL_bostr) * (scan->flags>>4);
- mask = 1 << (offset % 8);
- offset /= 8;
- if (PL_reg_poscache[offset] & mask) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: (cache) already tried at this position...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- sayNO; /* cache records failure */
- }
- ST.cache_offset = offset;
- ST.cache_mask = mask;
- }
- }
-
- /* Prefer B over A for minimal matching. */
-
- if (cur_curlyx->u.curlyx.minmod) {
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- ST.cp = regcppush(ST.save_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_YES_STATE_GOTO(WHILEM_B_min, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
- }
-
- /* Prefer A over B for maximal matching. */
-
- if (n < cur_curlyx->u.curlyx.max) { /* More greed allowed? */
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- cur_curlyx->u.curlyx.lastloc = locinput;
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_max, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
- goto do_whilem_B_max;
- }
- /* NOTREACHED */
-
- case WHILEM_B_min: /* just matched B in a minimal match */
- case WHILEM_B_max: /* just matched B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case WHILEM_B_max_fail: /* just failed to match B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_min_fail: /* just failed to match A in a minimal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- /* FALL THROUGH */
- case WHILEM_A_pre_fail: /* just failed to match even minimal A */
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_max_fail: /* just failed to match A in a maximal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex); /* Restore some previous $<digit>s? */
- PL_reginput = locinput;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s whilem: failed, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- do_whilem_B_max:
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
-
- /* now try B */
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- PUSH_YES_STATE_GOTO(WHILEM_B_max, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
-
- case WHILEM_B_min_fail: /* just failed to match B in a minimal match */
- cur_curlyx = ST.save_curlyx;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
-
- if (cur_curlyx->u.curlyx.count >= cur_curlyx->u.curlyx.max) {
- /* Maximum greed exceeded */
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP),
- "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s trying longer...\n", REPORT_CODE_OFF+depth*2, "")
- );
- /* Try grabbing another A and see if it helps. */
- PL_reginput = locinput;
- cur_curlyx->u.curlyx.lastloc = locinput;
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_min, ST.save_curlyx->u.curlyx.A);
- /* NOTREACHED */
-
-#undef ST
-#define ST st->u.branch
-
- case BRANCHJ: /* /(...|A|...)/ with long next pointer */
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- scan = NEXTOPER(scan);
- /* FALL THROUGH */
-
- case BRANCH: /* /(...|A|...)/ */
- scan = NEXTOPER(scan); /* scan now points to inner node */
- ST.lastparen = *PL_reglastparen;
- ST.next_branch = next;
- REGCP_SET(ST.cp);
- PL_reginput = locinput;
-
- /* Now go into the branch */
- if (has_cutgroup) {
- PUSH_YES_STATE_GOTO(BRANCH_next, scan);
- } else {
- PUSH_STATE_GOTO(BRANCH_next, scan);
- }
- /* NOTREACHED */
- case CUTGROUP:
- PL_reginput = locinput;
- sv_yes_mark = st->u.mark.mark_name = scan->flags ? NULL :
- MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(CUTGROUP_next,next);
- /* NOTREACHED */
- case CUTGROUP_next_fail:
- do_cutgroup = 1;
- no_final = 1;
- if (st->u.mark.mark_name)
- sv_commit = st->u.mark.mark_name;
- sayNO;
- /* NOTREACHED */
- case BRANCH_next:
- sayYES;
- /* NOTREACHED */
- case BRANCH_next_fail: /* that branch failed; try the next, if any */
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- /*dmq: *PL_reglastcloseparen = n; */
- scan = ST.next_branch;
- /* no more branches? */
- if (!scan || (OP(scan) != BRANCH && OP(scan) != BRANCHJ)) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sBRANCH failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- sayNO_SILENT;
- }
- continue; /* execute next BRANCH[J] op */
- /* NOTREACHED */
-
- case MINMOD:
- minmod = 1;
- break;
-
-#undef ST
-#define ST st->u.curlym
-
- case CURLYM: /* /A{m,n}B/ where A is fixed-length */
-
- /* This is an optimisation of CURLYX that enables us to push
- * only a single backtracking state, no matter how many matches
- * there are in {m,n}. It relies on the pattern being constant
- * length, with no parens to influence future backrefs
- */
-
- ST.me = scan;
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
-
- /* if paren positive, emulate an OPEN/CLOSE around A */
- if (ST.me->flags) {
- U32 paren = ST.me->flags;
- if (paren > PL_regsize)
- PL_regsize = paren;
- if (paren > *PL_reglastparen)
- *PL_reglastparen = paren;
- scan += NEXT_OFF(scan); /* Skip former OPEN. */
- }
- ST.A = scan;
- ST.B = next;
- ST.alen = 0;
- ST.count = 0;
- ST.minmod = minmod;
- minmod = 0;
- ST.c1 = CHRTEST_UNINIT;
- REGCP_SET(ST.cp);
-
- if (!(ST.minmod ? ARG1(ST.me) : ARG2(ST.me))) /* min/max */
- goto curlym_do_B;
-
- curlym_do_A: /* execute the A in /A{m,n}B/ */
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYM_A, ST.A); /* match A */
- /* NOTREACHED */
-
- case CURLYM_A: /* we've just matched an A */
- locinput = st->locinput;
- nextchr = UCHARAT(locinput);
-
- ST.count++;
- /* after first match, determine A's length: u.curlym.alen */
- if (ST.count == 1) {
- if (PL_reg_match_utf8) {
- char *s = locinput;
- while (s < PL_reginput) {
- ST.alen++;
- s += UTF8SKIP(s);
- }
- }
- else {
- ST.alen = PL_reginput - locinput;
- }
- if (ST.alen == 0)
- ST.count = ST.minmod ? ARG1(ST.me) : ARG2(ST.me);
- }
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM now matched %"IVdf" times, len=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)), "",
- (IV) ST.count, (IV)ST.alen)
- );
-
- locinput = PL_reginput;
-
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- goto fake_end;
-
- {
- I32 max = (ST.minmod ? ARG1(ST.me) : ARG2(ST.me));
- if ( max == REG_INFTY || ST.count < max )
- goto curlym_do_A; /* try to match another A */
- }
- goto curlym_do_B; /* try to match B */
-
- case CURLYM_A_fail: /* just failed to match an A */
- REGCP_UNWIND(ST.cp);
-
- if (ST.minmod || ST.count < ARG1(ST.me) /* min*/
- || (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags))
- sayNO;
-
- curlym_do_B: /* execute the B in /A{m,n}B/ */
- PL_reginput = locinput;
- if (ST.c1 == CHRTEST_UNINIT) {
- /* calculate c1 and c2 for possible match of 1st char
- * following curly */
- ST.c1 = ST.c2 = CHRTEST_VOID;
- if (HAS_TEXT(ST.B) || JUMPABLE(ST.B)) {
- regnode *text_node = ST.B;
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
- /* this used to be
-
- (HAS_TEXT(text_node) && PL_regkind[OP(text_node)] == EXACT)
-
- But the former is redundant in light of the latter.
-
- if this changes back then the macro for
- IS_TEXT and friends need to change.
- */
- if (PL_regkind[OP(text_node)] == EXACT)
- {
-
- ST.c1 = (U8)*STRING(text_node);
- ST.c2 =
- (IS_TEXTF(text_node))
- ? PL_fold[ST.c1]
- : (IS_TEXTFL(text_node))
- ? PL_fold_locale[ST.c1]
- : ST.c1;
- }
- }
- }
-
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM trying tail with matches=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)),
- "", (IV)ST.count)
- );
- if (ST.c1 != CHRTEST_VOID
- && UCHARAT(PL_reginput) != ST.c1
- && UCHARAT(PL_reginput) != ST.c2)
- {
- /* simulate B failing */
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM Fast bail c1=%"IVdf" c2=%"IVdf"\n",
- (int)(REPORT_CODE_OFF+(depth*2)),"",
- (IV)ST.c1,(IV)ST.c2
- ));
- state_num = CURLYM_B_fail;
- goto reenter_switch;
- }
-
- if (ST.me->flags) {
- /* mark current A as captured */
- I32 paren = ST.me->flags;
- if (ST.count) {
- PL_regoffs[paren].start
- = HOPc(PL_reginput, -ST.alen) - PL_bostr;
- PL_regoffs[paren].end = PL_reginput - PL_bostr;
- /*dmq: *PL_reglastcloseparen = paren; */
- }
- else
- PL_regoffs[paren].end = -1;
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- {
- if (ST.count)
- goto fake_end;
- else
- sayNO;
- }
- }
-
- PUSH_STATE_GOTO(CURLYM_B, ST.B); /* match B */
- /* NOTREACHED */
-
- case CURLYM_B_fail: /* just failed to match a B */
- REGCP_UNWIND(ST.cp);
- if (ST.minmod) {
- I32 max = ARG2(ST.me);
- if (max != REG_INFTY && ST.count == max)
- sayNO;
- goto curlym_do_A; /* try to match a further A */
- }
- /* backtrack one A */
- if (ST.count == ARG1(ST.me) /* min */)
- sayNO;
- ST.count--;
- locinput = HOPc(locinput, -ST.alen);
- goto curlym_do_B; /* try to match B */
-
-#undef ST
-#define ST st->u.curly
-
-#define CURLY_SETPAREN(paren, success) \
- if (paren) { \
- if (success) { \
- PL_regoffs[paren].start = HOPc(locinput, -1) - PL_bostr; \
- PL_regoffs[paren].end = locinput - PL_bostr; \
- *PL_reglastcloseparen = paren; \
- } \
- else \
- PL_regoffs[paren].end = -1; \
- }
-
- case STAR: /* /A*B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 0;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case PLUS: /* /A+B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 1;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case CURLYN: /* /(A){m,n}B/ where A is width 1 */
- ST.paren = scan->flags; /* Which paren to set */
- if (ST.paren > PL_regsize)
- PL_regsize = ST.paren;
- if (ST.paren > *PL_reglastparen)
- *PL_reglastparen = ST.paren;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- ST.min=1;
- ST.max=1;
- }
- scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE);
- goto repeat;
- case CURLY: /* /A{m,n}B/ where A is width 1 */
- ST.paren = 0;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
- repeat:
- /*
- * Lookahead to avoid useless match attempts
- * when we know what character comes next.
- *
- * Used to only do .*x and .*?x, but now it allows
- * for )'s, ('s and (?{ ... })'s to be in the way
- * of the quantifier and the EXACT-like node. -- japhy
- */
-
- if (ST.min > ST.max) /* XXX make this a compile-time check? */
- sayNO;
- if (HAS_TEXT(next) || JUMPABLE(next)) {
- U8 *s;
- regnode *text_node = next;
-
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
-
- if (! HAS_TEXT(text_node))
- ST.c1 = ST.c2 = CHRTEST_VOID;
- else {
- if ( PL_regkind[OP(text_node)] != EXACT ) {
- ST.c1 = ST.c2 = CHRTEST_VOID;
- goto assume_ok_easy;
- }
- else
- s = (U8*)STRING(text_node);
-
- /* Currently we only get here when
-
- PL_rekind[OP(text_node)] == EXACT
-
- if this changes back then the macro for IS_TEXT and
- friends need to change. */
- if (!UTF) {
- ST.c2 = ST.c1 = *s;
- if (IS_TEXTF(text_node))
- ST.c2 = PL_fold[ST.c1];
- else if (IS_TEXTFL(text_node))
- ST.c2 = PL_fold_locale[ST.c1];
- }
- else { /* UTF */
- if (IS_TEXTF(text_node)) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- to_utf8_lower((U8*)s, tmpbuf1, &ulen1);
- to_utf8_upper((U8*)s, tmpbuf2, &ulen2);
-#ifdef EBCDIC
- ST.c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
- ST.c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
-#else
- ST.c1 = utf8n_to_uvuni(tmpbuf1, UTF8_MAXBYTES, 0,
- uniflags);
- ST.c2 = utf8n_to_uvuni(tmpbuf2, UTF8_MAXBYTES, 0,
- uniflags);
-#endif
- }
- else {
- ST.c2 = ST.c1 = utf8n_to_uvchr(s, UTF8_MAXBYTES, 0,
- uniflags);
- }
- }
- }
- }
- else
- ST.c1 = ST.c2 = CHRTEST_VOID;
- assume_ok_easy:
-
- ST.A = scan;
- ST.B = next;
- PL_reginput = locinput;
- if (minmod) {
- minmod = 0;
- if (ST.min && regrepeat(rex, ST.A, ST.min, depth) < ST.min)
- sayNO;
- ST.count = ST.min;
- locinput = PL_reginput;
- REGCP_SET(ST.cp);
- if (ST.c1 == CHRTEST_VOID)
- goto curly_try_B_min;
-
- ST.oldloc = locinput;
-
- /* set ST.maxpos to the furthest point along the
- * string that could possibly match */
- if (ST.max == REG_INFTY) {
- ST.maxpos = PL_regeol - 1;
- if (do_utf8)
- while (UTF8_IS_CONTINUATION(*(U8*)ST.maxpos))
- ST.maxpos--;
- }
- else if (do_utf8) {
- int m = ST.max - ST.min;
- for (ST.maxpos = locinput;
- m >0 && ST.maxpos + UTF8SKIP(ST.maxpos) <= PL_regeol; m--)
- ST.maxpos += UTF8SKIP(ST.maxpos);
- }
- else {
- ST.maxpos = locinput + ST.max - ST.min;
- if (ST.maxpos >= PL_regeol)
- ST.maxpos = PL_regeol - 1;
- }
- goto curly_try_B_min_known;
-
- }
- else {
- ST.count = regrepeat(rex, ST.A, ST.max, depth);
- locinput = PL_reginput;
- if (ST.count < ST.min)
- sayNO;
- if ((ST.count > ST.min)
- && (PL_regkind[OP(ST.B)] == EOL) && (OP(ST.B) != MEOL))
- {
- /* A{m,n} must come at the end of the string, there's
- * no point in backing off ... */
- ST.min = ST.count;
- /* ...except that $ and \Z can match before *and* after
- newline at the end. Consider "\n\n" =~ /\n+\Z\n/.
- We may back off by one in this case. */
- if (UCHARAT(PL_reginput - 1) == '\n' && OP(ST.B) != EOS)
- ST.min--;
- }
- REGCP_SET(ST.cp);
- goto curly_try_B_max;
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_known_fail:
- /* failed to find B in a non-greedy match where c1,c2 valid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- PL_reginput = locinput; /* Could be reset... */
- REGCP_UNWIND(ST.cp);
- /* Couldn't or didn't -- move forward. */
- ST.oldloc = locinput;
- if (do_utf8)
- locinput += UTF8SKIP(locinput);
- else
- locinput++;
- ST.count++;
- curly_try_B_min_known:
- /* find the next place where 'B' could work, then call B */
- {
- int n;
- if (do_utf8) {
- n = (ST.oldloc == locinput) ? 0 : 1;
- if (ST.c1 == ST.c2) {
- STRLEN len;
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos &&
- utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags) != (UV)ST.c1) {
- locinput += len;
- n++;
- }
- }
- else {
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos) {
- STRLEN len;
- const UV c = utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags);
- if (c == (UV)ST.c1 || c == (UV)ST.c2)
- break;
- locinput += len;
- n++;
- }
- }
- }
- else {
- if (ST.c1 == ST.c2) {
- while (locinput <= ST.maxpos &&
- UCHARAT(locinput) != ST.c1)
- locinput++;
- }
- else {
- while (locinput <= ST.maxpos
- && UCHARAT(locinput) != ST.c1
- && UCHARAT(locinput) != ST.c2)
- locinput++;
- }
- n = locinput - ST.oldloc;
- }
- if (locinput > ST.maxpos)
- sayNO;
- /* PL_reginput == oldloc now */
- if (n) {
- ST.count += n;
- if (regrepeat(rex, ST.A, n, depth) < n)
- sayNO;
- }
- PL_reginput = locinput;
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min_known, ST.B);
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_fail:
- /* failed to find B in a non-greedy match where c1,c2 invalid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* failed -- move forward one */
- PL_reginput = locinput;
- if (regrepeat(rex, ST.A, 1, depth)) {
- ST.count++;
- locinput = PL_reginput;
- if (ST.count <= ST.max || (ST.max == REG_INFTY &&
- ST.count > 0)) /* count overflow ? */
- {
- curly_try_B_min:
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min, ST.B);
- }
- }
- sayNO;
- /* NOTREACHED */
-
-
- curly_try_B_max:
- /* a successful greedy match: now try to match B */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- {
- UV c = 0;
- if (ST.c1 != CHRTEST_VOID)
- c = do_utf8 ? utf8n_to_uvchr((U8*)PL_reginput,
- UTF8_MAXBYTES, 0, uniflags)
- : (UV) UCHARAT(PL_reginput);
- /* If it could work, try it. */
- if (ST.c1 == CHRTEST_VOID || c == (UV)ST.c1 || c == (UV)ST.c2) {
- CURLY_SETPAREN(ST.paren, ST.count);
- PUSH_STATE_GOTO(CURLY_B_max, ST.B);
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case CURLY_B_max_fail:
- /* failed to find B in a greedy match */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* back up. */
- if (--ST.count < ST.min)
- sayNO;
- PL_reginput = locinput = HOPc(locinput, -1);
- goto curly_try_B_max;
-
-#undef ST
-
- case END:
- fake_end:
- if (cur_eval) {
- /* we've just finished A in /(??{A})B/; now continue with B */
- I32 tmpix;
- st->u.eval.toggle_reg_flags
- = cur_eval->u.eval.toggle_reg_flags;
- PL_reg_flags ^= st->u.eval.toggle_reg_flags;
-
- st->u.eval.prev_rex = rex_sv; /* inner */
- SETREX(rex_sv,cur_eval->u.eval.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- cur_curlyx = cur_eval->u.eval.prev_curlyx;
- ReREFCNT_inc(rex_sv);
- st->u.eval.cp = regcppush(0); /* Save *all* the positions. */
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- REGCP_SET(st->u.eval.lastcp);
- PL_reginput = locinput;
-
- /* Restore parens of the outer rex without popping the
- * savestack */
- tmpix = PL_savestack_ix;
- PL_savestack_ix = cur_eval->u.eval.lastcp;
- regcppop(rex);
- PL_savestack_ix = tmpix;
-
- st->u.eval.prev_eval = cur_eval;
- cur_eval = cur_eval->u.eval.prev_eval;
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log, "%*s EVAL trying tail ... %"UVxf"\n",
- REPORT_CODE_OFF+depth*2, "",PTR2UV(cur_eval)););
- if ( nochange_depth )
- nochange_depth--;
-
- PUSH_YES_STATE_GOTO(EVAL_AB,
- st->u.eval.prev_eval->u.eval.B); /* match B */
- }
-
- if (locinput < reginfo->till) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n",
- PL_colors[4],
- (long)(locinput - PL_reg_starttry),
- (long)(reginfo->till - PL_reg_starttry),
- PL_colors[5]));
-
- sayNO_SILENT; /* Cannot match: too short. */
- }
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
- case SUCCEED: /* successful SUSPEND/UNLESSM/IFMATCH/CURLYM */
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %ssubpattern success...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]));
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
-#undef ST
-#define ST st->u.ifmatch
-
- case SUSPEND: /* (?>A) */
- ST.wanted = 1;
- PL_reginput = locinput;
- goto do_ifmatch;
-
- case UNLESSM: /* -ve lookaround: (?!A), or with flags, (?<!A) */
- ST.wanted = 0;
- goto ifmatch_trivial_fail_test;
-
- case IFMATCH: /* +ve lookaround: (?=A), or with flags, (?<=A) */
- ST.wanted = 1;
- ifmatch_trivial_fail_test:
- if (scan->flags) {
- char * const s = HOPBACKc(locinput, scan->flags);
- if (!s) {
- /* trivial fail */
- if (logical) {
- logical = 0;
- sw = 1 - (bool)ST.wanted;
- }
- else if (ST.wanted)
- sayNO;
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- }
- PL_reginput = s;
- }
- else
- PL_reginput = locinput;
-
- do_ifmatch:
- ST.me = scan;
- ST.logical = logical;
- logical = 0; /* XXX: reset state of logical once it has been saved into ST */
-
- /* execute body of (?...A) */
- PUSH_YES_STATE_GOTO(IFMATCH_A, NEXTOPER(NEXTOPER(scan)));
- /* NOTREACHED */
-
- case IFMATCH_A_fail: /* body of (?...A) failed */
- ST.wanted = !ST.wanted;
- /* FALL THROUGH */
-
- case IFMATCH_A: /* body of (?...A) succeeded */
- if (ST.logical) {
- sw = (bool)ST.wanted;
- }
- else if (!ST.wanted)
- sayNO;
-
- if (OP(ST.me) == SUSPEND)
- locinput = PL_reginput;
- else {
- locinput = PL_reginput = st->locinput;
- nextchr = UCHARAT(locinput);
- }
- scan = ST.me + ARG(ST.me);
- if (scan == ST.me)
- scan = NULL;
- continue; /* execute B */
-
-#undef ST
-
- case LONGJMP:
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- case COMMIT:
- reginfo->cutpoint = PL_regeol;
- /* FALLTHROUGH */
- case PRUNE:
- PL_reginput = locinput;
- if (!scan->flags)
- sv_yes_mark = sv_commit = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(COMMIT_next,next);
- /* NOTREACHED */
- case COMMIT_next_fail:
- no_final = 1;
- /* FALLTHROUGH */
- case OPFAIL:
- sayNO;
- /* NOTREACHED */
-
-#define ST st->u.mark
- case MARKPOINT:
- ST.prev_mark = mark_state;
- ST.mark_name = sv_commit = sv_yes_mark
- = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- mark_state = st;
- ST.mark_loc = PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(MARKPOINT_next,next);
- /* NOTREACHED */
- case MARKPOINT_next:
- mark_state = ST.prev_mark;
- sayYES;
- /* NOTREACHED */
- case MARKPOINT_next_fail:
- if (popmark && sv_eq(ST.mark_name,popmark))
- {
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- popmark = NULL; /* we found our mark */
- sv_commit = ST.mark_name;
-
- DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,
- "%*s %ssetting cutpoint to mark:%"SVf"...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], SVfARG(sv_commit), PL_colors[5]);
- });
- }
- mark_state = ST.prev_mark;
- sv_yes_mark = mark_state ?
- mark_state->u.mark.mark_name : NULL;
- sayNO;
- /* NOTREACHED */
- case SKIP:
- PL_reginput = locinput;
- if (scan->flags) {
- /* (*SKIP) : if we fail we cut here*/
- ST.mark_name = NULL;
- ST.mark_loc = locinput;
- PUSH_STATE_GOTO(SKIP_next,next);
- } else {
- /* (*SKIP:NAME) : if there is a (*MARK:NAME) fail where it was,
- otherwise do nothing. Meaning we need to scan
- */
- regmatch_state *cur = mark_state;
- SV *find = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
-
- while (cur) {
- if ( sv_eq( cur->u.mark.mark_name,
- find ) )
- {
- ST.mark_name = find;
- PUSH_STATE_GOTO( SKIP_next, next );
- }
- cur = cur->u.mark.prev_mark;
- }
- }
- /* Didn't find our (*MARK:NAME) so ignore this (*SKIP:NAME) */
- break;
- case SKIP_next_fail:
- if (ST.mark_name) {
- /* (*CUT:NAME) - Set up to search for the name as we
- collapse the stack*/
- popmark = ST.mark_name;
- } else {
- /* (*CUT) - No name, we cut here.*/
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- /* but we set sv_commit to latest mark_name if there
- is one so they can test to see how things lead to this
- cut */
- if (mark_state)
- sv_commit=mark_state->u.mark.mark_name;
- }
- no_final = 1;
- sayNO;
- /* NOTREACHED */
-#undef ST
- case FOLDCHAR:
- n = ARG(scan);
- if ( n == (U32)what_len_TRICKYFOLD(locinput,do_utf8,ln) ) {
- locinput += ln;
- } else if ( 0xDF == n && !do_utf8 && !UTF ) {
- sayNO;
- } else {
- U8 folded[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const char * const l = locinput;
- char *e = PL_regeol;
- to_uni_fold(n, folded, &foldlen);
-
- if (ibcmp_utf8((const char*) folded, 0, foldlen, 1,
- l, &e, 0, do_utf8)) {
- sayNO;
- }
- locinput = e;
- }
- nextchr = UCHARAT(locinput);
- break;
- case LNBREAK:
- if ((n=is_LNBREAK(locinput,do_utf8))) {
- locinput += n;
- nextchr = UCHARAT(locinput);
- } else
- sayNO;
- break;
-
-#define CASE_CLASS(nAmE) \
- case nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- locinput += n; \
- nextchr = UCHARAT(locinput); \
- } else \
- sayNO; \
- break; \
- case N##nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- sayNO; \
- } else { \
- locinput += UTF8SKIP(locinput); \
- nextchr = UCHARAT(locinput); \
- } \
- break
-
- CASE_CLASS(VERTWS);
- CASE_CLASS(HORIZWS);
-#undef CASE_CLASS
-
- default:
- PerlIO_printf(Perl_error_log, "%"UVxf" %d\n",
- PTR2UV(scan), OP(scan));
- Perl_croak(aTHX_ "regexp memory corruption");
-
- } /* end switch */
-
- /* switch break jumps here */
- scan = next; /* prepare to execute the next op and ... */
- continue; /* ... jump back to the top, reusing st */
- /* NOTREACHED */
-
- push_yes_state:
- /* push a state that backtracks on success */
- st->u.yes.prev_yes_state = yes_state;
- yes_state = st;
- /* FALL THROUGH */
- push_state:
- /* push a new regex state, then continue at scan */
- {
- regmatch_state *newst;
-
- DEBUG_STACK_r({
- regmatch_state *cur = st;
- regmatch_state *curyes = yes_state;
- int curd = depth;
- regmatch_slab *slab = PL_regmatch_slab;
- for (;curd > -1;cur--,curd--) {
- if (cur < SLAB_FIRST(slab)) {
- slab = slab->prev;
- cur = SLAB_LAST(slab);
- }
- PerlIO_printf(Perl_error_log, "%*s#%-3d %-10s %s\n",
- REPORT_CODE_OFF + 2 + depth * 2,"",
- curd, PL_reg_name[cur->resume_state],
- (curyes == cur) ? "yes" : ""
- );
- if (curyes == cur)
- curyes = cur->u.yes.prev_yes_state;
- }
- } else
- DEBUG_STATE_pp("push")
- );
- depth++;
- st->locinput = locinput;
- newst = st+1;
- if (newst > SLAB_LAST(PL_regmatch_slab))
- newst = S_push_slab(aTHX);
- PL_regmatch_state = newst;
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- st = newst;
- continue;
- /* NOTREACHED */
- }
- }
-
- /*
- * We get here only if there's trouble -- normally "case END" is
- * the terminating point.
- */
- Perl_croak(aTHX_ "corrupted regexp pointers");
- /*NOTREACHED*/
- sayNO;
-
-yes:
- if (yes_state) {
- /* we have successfully completed a subexpression, but we must now
- * pop to the state marked by yes_state and continue from there */
- assert(st != yes_state);
-#ifdef DEBUGGING
- while (st != yes_state) {
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- DEBUG_STATE_r({
- if (no_final) {
- DEBUG_STATE_pp("pop (no final)");
- } else {
- DEBUG_STATE_pp("pop (yes)");
- }
- });
- depth--;
- }
-#else
- while (yes_state < SLAB_FIRST(PL_regmatch_slab)
- || yes_state > SLAB_LAST(PL_regmatch_slab))
- {
- /* not in this slab, pop slab */
- depth -= (st - SLAB_FIRST(PL_regmatch_slab) + 1);
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- depth -= (st - yes_state);
-#endif
- st = yes_state;
- yes_state = st->u.yes.prev_yes_state;
- PL_regmatch_state = st;
-
- if (no_final) {
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
- }
- state_num = st->resume_state + no_final;
- goto reenter_switch;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n",
- PL_colors[4], PL_colors[5]));
-
- if (PL_reg_eval_set) {
- /* each successfully executed (?{...}) block does the equivalent of
- * local $^R = do {...}
- * When popping the save stack, all these locals would be undone;
- * bypass this by setting the outermost saved $^R to the latest
- * value */
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- }
- result = 1;
- goto final_exit;
-
-no:
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], PL_colors[5])
- );
-
-no_silent:
- if (no_final) {
- if (yes_state) {
- goto yes;
- } else {
- goto final_exit;
- }
- }
- if (depth) {
- /* there's a previous state to backtrack to */
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- PL_regmatch_state = st;
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
-
- DEBUG_STATE_pp("pop");
- depth--;
- if (yes_state == st)
- yes_state = st->u.yes.prev_yes_state;
-
- state_num = st->resume_state + 1; /* failure = success + 1 */
- goto reenter_switch;
- }
- result = 0;
-
- final_exit:
- if (rex->intflags & PREGf_VERBARG_SEEN) {
- SV *sv_err = get_sv("REGERROR", 1);
- SV *sv_mrk = get_sv("REGMARK", 1);
- if (result) {
- sv_commit = &PL_sv_no;
- if (!sv_yes_mark)
- sv_yes_mark = &PL_sv_yes;
- } else {
- if (!sv_commit)
- sv_commit = &PL_sv_yes;
- sv_yes_mark = &PL_sv_no;
- }
- sv_setsv(sv_err, sv_commit);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- /* clean up; in particular, free all slabs above current one */
- LEAVE_SCOPE(oldsave);
-
- return result;
-}
-
-/*
- - regrepeat - repeatedly match something simple, report how many
- */
-/*
- * [This routine now assumes that it will only match on things of length 1.
- * That was true before, but now we assume scan - reginput is the count,
- * rather than incrementing count on every character. [Er, except utf8.]]
- */
-STATIC I32
-S_regrepeat(pTHX_ const regexp *prog, const regnode *p, I32 max, int depth)
-{
- dVAR;
- register char *scan;
- register I32 c;
- register char *loceol = PL_regeol;
- register I32 hardcount = 0;
- register bool do_utf8 = PL_reg_match_utf8;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_REGREPEAT;
-
- scan = PL_reginput;
- if (max == REG_INFTY)
- max = I32_MAX;
- else if (max < loceol - scan)
- loceol = scan + max;
- switch (OP(p)) {
- case REG_ANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max && *scan != '\n') {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && *scan != '\n')
- scan++;
- }
- break;
- case SANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- }
- else
- scan = loceol;
- break;
- case CANY:
- scan = loceol;
- break;
- case EXACT: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol && UCHARAT(scan) == c)
- scan++;
- break;
- case EXACTF: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c]))
- scan++;
- break;
- case EXACTFL: /* length of string is 1 */
- PL_reg_flags |= RF_tainted;
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c]))
- scan++;
- break;
- case ANYOF:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- reginclass(prog, p, (U8*)scan, 0, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && REGINCLASS(prog, p, (U8*)scan))
- scan++;
- }
- break;
- case ALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM(*scan))
- scan++;
- }
- break;
- case ALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM_LC(*scan))
- scan++;
- }
- break;
- case NALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM(*scan))
- scan++;
- }
- break;
- case NALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM_LC(*scan))
- scan++;
- }
- break;
- case SPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE(*scan))
- scan++;
- }
- break;
- case SPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE_LC(*scan))
- scan++;
- }
- break;
- case NSPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE(*scan))
- scan++;
- }
- break;
- case NSPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE_LC(*scan))
- scan++;
- }
- break;
- case DIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isDIGIT(*scan))
- scan++;
- }
- break;
- case NDIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isDIGIT(*scan))
- scan++;
- }
- case LNBREAK:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_LNBREAK_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- /*
- LNBREAK can match two latin chars, which is ok,
- because we have a null terminated string, but we
- have to use hardcount in this situation
- */
- while (scan < loceol && (c=is_LNBREAK_latin1(scan))) {
- scan+=c;
- hardcount++;
- }
- }
- break;
- case HORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_HORIZWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_HORIZWS_latin1(scan))
- scan++;
- }
- break;
- case NHORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_HORIZWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_HORIZWS_latin1(scan))
- scan++;
-
- }
- break;
- case VERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_VERTWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
- case NVERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_VERTWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
-
- default: /* Called on something of 0 width. */
- break; /* So match right here or not at all. */
- }
-
- if (hardcount)
- c = hardcount;
- else
- c = scan - PL_reginput;
- PL_reginput = scan;
-
- DEBUG_r({
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, p);
- PerlIO_printf(Perl_debug_log,
- "%*s %s can match %"IVdf" times out of %"IVdf"...\n",
- REPORT_CODE_OFF + depth*2, "", SvPVX_const(prop),(IV)c,(IV)max);
- });
- });
-
- return(c);
-}
-
-
-#if !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION)
-/*
-- regclass_swash - prepare the utf8 swash
-*/
-
-SV *
-Perl_regclass_swash(pTHX_ const regexp *prog, register const regnode* node, bool doinit, SV** listsvp, SV **altsvp)
-{
- dVAR;
- SV *sw = NULL;
- SV *si = NULL;
- SV *alt = NULL;
- RXi_GET_DECL(prog,progi);
- const struct reg_data * const data = prog ? progi->data : NULL;
-
- PERL_ARGS_ASSERT_REGCLASS_SWASH;
-
- if (data && data->count) {
- const U32 n = ARG(node);
-
- if (data->what[n] == 's') {
- SV * const rv = MUTABLE_SV(data->data[n]);
- AV * const av = MUTABLE_AV(SvRV(rv));
- SV **const ary = AvARRAY(av);
- SV **a, **b;
-
- /* See the end of regcomp.c:S_regclass() for
- * documentation of these array elements. */
-
- si = *ary;
- a = SvROK(ary[1]) ? &ary[1] : NULL;
- b = SvTYPE(ary[2]) == SVt_PVAV ? &ary[2] : NULL;
-
- if (a)
- sw = *a;
- else if (si && doinit) {
- sw = swash_init("utf8", "", si, 1, 0);
- (void)av_store(av, 1, sw);
- }
- if (b)
- alt = *b;
- }
- }
-
- if (listsvp)
- *listsvp = si;
- if (altsvp)
- *altsvp = alt;
-
- return sw;
-}
-#endif
-
-/*
- - reginclass - determine if a character falls into a character class
-
- The n is the ANYOF regnode, the p is the target string, lenp
- is pointer to the maximum length of how far to go in the p
- (if the lenp is zero, UTF8SKIP(p) is used),
- do_utf8 tells whether the target string is in UTF-8.
-
- */
-
-STATIC bool
-S_reginclass(pTHX_ const regexp *prog, register const regnode *n, register const U8* p, STRLEN* lenp, register bool do_utf8)
-{
- dVAR;
- const char flags = ANYOF_FLAGS(n);
- bool match = FALSE;
- UV c = *p;
- STRLEN len = 0;
- STRLEN plen;
-
- PERL_ARGS_ASSERT_REGINCLASS;
-
- if (do_utf8 && !UTF8_IS_INVARIANT(c)) {
- c = utf8n_to_uvchr(p, UTF8_MAXBYTES, &len,
- (UTF8_ALLOW_DEFAULT & UTF8_ALLOW_ANYUV) | UTF8_CHECK_ONLY);
- /* see [perl #37836] for UTF8_ALLOW_ANYUV */
- if (len == (STRLEN)-1)
- Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)");
- }
-
- plen = lenp ? *lenp : UNISKIP(NATIVE_TO_UNI(c));
- if (do_utf8 || (flags & ANYOF_UNICODE)) {
- if (lenp)
- *lenp = 0;
- if (do_utf8 && !ANYOF_RUNTIME(n)) {
- if (len != (STRLEN)-1 && c < 256 && ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- }
- if (!match && do_utf8 && (flags & ANYOF_UNICODE_ALL) && c >= 256)
- match = TRUE;
- if (!match) {
- AV *av;
- SV * const sw = regclass_swash(prog, n, TRUE, 0, (SV**)&av);
-
- if (sw) {
- U8 * utf8_p;
- if (do_utf8) {
- utf8_p = (U8 *) p;
- } else {
- STRLEN len = 1;
- utf8_p = bytes_to_utf8(p, &len);
- }
- if (swash_fetch(sw, utf8_p, 1))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- if (!match && lenp && av) {
- I32 i;
- for (i = 0; i <= av_len(av); i++) {
- SV* const sv = *av_fetch(av, i, FALSE);
- STRLEN len;
- const char * const s = SvPV_const(sv, len);
- if (len <= plen && memEQ(s, (char*)utf8_p, len)) {
- *lenp = len;
- match = TRUE;
- break;
- }
- }
- }
- if (!match) {
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1];
-
- STRLEN tmplen;
- to_utf8_fold(utf8_p, tmpbuf, &tmplen);
- if (swash_fetch(sw, tmpbuf, 1))
- match = TRUE;
- }
- }
-
- /* If we allocated a string above, free it */
- if (! do_utf8) Safefree(utf8_p);
- }
- }
- if (match && lenp && *lenp == 0)
- *lenp = UNISKIP(NATIVE_TO_UNI(c));
- }
- if (!match && c < 256) {
- if (ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- U8 f;
-
- if (flags & ANYOF_LOCALE) {
- PL_reg_flags |= RF_tainted;
- f = PL_fold_locale[c];
- }
- else
- f = PL_fold[c];
- if (f != c && ANYOF_BITMAP_TEST(n, f))
- match = TRUE;
- }
-
- if (!match && (flags & ANYOF_CLASS)) {
- PL_reg_flags |= RF_tainted;
- if (
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK(c))
- ) /* How's that for a conditional? */
- {
- match = TRUE;
- }
- }
- }
-
- return (flags & ANYOF_INVERT) ? !match : match;
-}
-
-STATIC U8 *
-S_reghop3(U8 *s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-
-#ifdef XXX_dmq
-/* there are a bunch of places where we use two reghop3's that should
- be replaced with this routine. but since thats not done yet
- we ifdef it out - dmq
-*/
-STATIC U8 *
-S_reghop4(U8 *s, I32 off, const U8* llim, const U8* rlim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP4;
-
- if (off >= 0) {
- while (off-- && s < rlim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > llim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > llim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-#endif
-
-STATIC U8 *
-S_reghopmaybe3(U8* s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOPMAYBE3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- if (off >= 0)
- return NULL;
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- if (off <= 0)
- return NULL;
- }
- return s;
-}
-
-static void
-restore_pos(pTHX_ void *arg)
-{
- dVAR;
- regexp * const rex = (regexp *)arg;
- if (PL_reg_eval_set) {
- if (PL_reg_oldsaved) {
- rex->subbeg = PL_reg_oldsaved;
- rex->sublen = PL_reg_oldsavedlen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- rex->saved_copy = PL_nrs;
-#endif
- RXp_MATCH_COPIED_on(rex);
- }
- PL_reg_magic->mg_len = PL_reg_oldpos;
- PL_reg_eval_set = 0;
- PL_curpm = PL_reg_oldcurpm;
- }
-}
-
-STATIC void
-S_to_utf8_substr(pTHX_ register regexp *prog)
-{
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_UTF8_SUBSTR;
-
- do {
- if (prog->substrs->data[i].substr
- && !prog->substrs->data[i].utf8_substr) {
- SV* const sv = newSVsv(prog->substrs->data[i].substr);
- prog->substrs->data[i].utf8_substr = sv;
- sv_utf8_upgrade(sv);
- if (SvVALID(prog->substrs->data[i].substr)) {
- const U8 flags = BmFLAGS(prog->substrs->data[i].substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- /* Whilst this makes the SV technically "invalid" (as its
- buffer is no longer followed by "\0") when fbm_compile()
- adds the "\n" back, a "\0" is restored. */
- }
- fbm_compile(sv, flags);
- }
- if (prog->substrs->data[i].substr == prog->check_substr)
- prog->check_utf8 = sv;
- }
- } while (i--);
-}
-
-STATIC void
-S_to_byte_substr(pTHX_ register regexp *prog)
-{
- dVAR;
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_BYTE_SUBSTR;
-
- do {
- if (prog->substrs->data[i].utf8_substr
- && !prog->substrs->data[i].substr) {
- SV* sv = newSVsv(prog->substrs->data[i].utf8_substr);
- if (sv_utf8_downgrade(sv, TRUE)) {
- if (SvVALID(prog->substrs->data[i].utf8_substr)) {
- const U8 flags
- = BmFLAGS(prog->substrs->data[i].utf8_substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- }
- fbm_compile(sv, flags);
- }
- } else {
- SvREFCNT_dec(sv);
- sv = &PL_sv_undef;
- }
- prog->substrs->data[i].substr = sv;
- if (prog->substrs->data[i].utf8_substr == prog->check_utf8)
- prog->check_substr = sv;
- }
- } while (i--);
-}
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regcomp.c
- */
-
-/*
- * 'A fair jaw-cracker dwarf-language must be.' --Samwise Gamgee
- *
- * [p.285 of _The Lord of the Rings_, II/iii: "The Ring Goes South"]
- */
-
-/* This file contains functions for compiling a regular expression. See
- * also regexec.c which funnily enough, contains functions for executing
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_comp.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
-
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGCOMP_C
-#include "perl.h"
-
-#ifndef PERL_IN_XSUB_RE
-# include "INTERN.h"
-#endif
-
-#define REG_COMP_C
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#ifdef op
-#undef op
-#endif /* op */
-
-#ifdef MSDOS
-# if defined(BUGGY_MSC6)
- /* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */
-# pragma optimize("a",off)
- /* But MSC 6.00A is happy with 'w', for aliases only across function calls*/
-# pragma optimize("w",on )
-# endif /* BUGGY_MSC6 */
-#endif /* MSDOS */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-typedef struct RExC_state_t {
- U32 flags; /* are we folding, multilining? */
- char *precomp; /* uncompiled string. */
- REGEXP *rx_sv; /* The SV that is the regexp. */
- regexp *rx; /* perl core regexp structure */
- regexp_internal *rxi; /* internal data for regexp object pprivate field */
- char *start; /* Start of input for compile */
- char *end; /* End of input for compile */
- char *parse; /* Input-scan pointer. */
- I32 whilem_seen; /* number of WHILEM in this expr */
- regnode *emit_start; /* Start of emitted-code area */
- regnode *emit_bound; /* First regnode outside of the allocated space */
- regnode *emit; /* Code-emit pointer; ®dummy = don't = compiling */
- I32 naughty; /* How bad is this pattern? */
- I32 sawback; /* Did we see \1, ...? */
- U32 seen;
- I32 size; /* Code size. */
- I32 npar; /* Capture buffer count, (OPEN). */
- I32 cpar; /* Capture buffer count, (CLOSE). */
- I32 nestroot; /* root parens we are in - used by accept */
- I32 extralen;
- I32 seen_zerolen;
- I32 seen_evals;
- regnode **open_parens; /* pointers to open parens */
- regnode **close_parens; /* pointers to close parens */
- regnode *opend; /* END node in program */
- I32 utf8; /* whether the pattern is utf8 or not */
- I32 orig_utf8; /* whether the pattern was originally in utf8 */
- /* XXX use this for future optimisation of case
- * where pattern must be upgraded to utf8. */
- HV *charnames; /* cache of named sequences */
- HV *paren_names; /* Paren names */
-
- regnode **recurse; /* Recurse regops */
- I32 recurse_count; /* Number of recurse regops */
-#if ADD_TO_REGEXEC
- char *starttry; /* -Dr: where regtry was called. */
-#define RExC_starttry (pRExC_state->starttry)
-#endif
-#ifdef DEBUGGING
- const char *lastparse;
- I32 lastnum;
- AV *paren_name_list; /* idx -> name */
-#define RExC_lastparse (pRExC_state->lastparse)
-#define RExC_lastnum (pRExC_state->lastnum)
-#define RExC_paren_name_list (pRExC_state->paren_name_list)
-#endif
-} RExC_state_t;
-
-#define RExC_flags (pRExC_state->flags)
-#define RExC_precomp (pRExC_state->precomp)
-#define RExC_rx_sv (pRExC_state->rx_sv)
-#define RExC_rx (pRExC_state->rx)
-#define RExC_rxi (pRExC_state->rxi)
-#define RExC_start (pRExC_state->start)
-#define RExC_end (pRExC_state->end)
-#define RExC_parse (pRExC_state->parse)
-#define RExC_whilem_seen (pRExC_state->whilem_seen)
-#ifdef RE_TRACK_PATTERN_OFFSETS
-#define RExC_offsets (pRExC_state->rxi->u.offsets) /* I am not like the others */
-#endif
-#define RExC_emit (pRExC_state->emit)
-#define RExC_emit_start (pRExC_state->emit_start)
-#define RExC_emit_bound (pRExC_state->emit_bound)
-#define RExC_naughty (pRExC_state->naughty)
-#define RExC_sawback (pRExC_state->sawback)
-#define RExC_seen (pRExC_state->seen)
-#define RExC_size (pRExC_state->size)
-#define RExC_npar (pRExC_state->npar)
-#define RExC_nestroot (pRExC_state->nestroot)
-#define RExC_extralen (pRExC_state->extralen)
-#define RExC_seen_zerolen (pRExC_state->seen_zerolen)
-#define RExC_seen_evals (pRExC_state->seen_evals)
-#define RExC_utf8 (pRExC_state->utf8)
-#define RExC_orig_utf8 (pRExC_state->orig_utf8)
-#define RExC_charnames (pRExC_state->charnames)
-#define RExC_open_parens (pRExC_state->open_parens)
-#define RExC_close_parens (pRExC_state->close_parens)
-#define RExC_opend (pRExC_state->opend)
-#define RExC_paren_names (pRExC_state->paren_names)
-#define RExC_recurse (pRExC_state->recurse)
-#define RExC_recurse_count (pRExC_state->recurse_count)
-
-
-#define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?')
-#define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \
- ((*s) == '{' && regcurly(s)))
-
-#ifdef SPSTART
-#undef SPSTART /* dratted cpp namespace... */
-#endif
-/*
- * Flags to be passed up and down.
- */
-#define WORST 0 /* Worst case. */
-#define HASWIDTH 0x01 /* Known to match non-null strings. */
-#define SIMPLE 0x02 /* Simple enough to be STAR/PLUS operand. */
-#define SPSTART 0x04 /* Starts with * or +. */
-#define TRYAGAIN 0x08 /* Weeded out a declaration. */
-#define POSTPONED 0x10 /* (?1),(?&name), (??{...}) or similar */
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-RExC_emit_start) : -1)
-
-/* whether trie related optimizations are enabled */
-#if PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION
-#define TRIE_STUDY_OPT
-#define FULL_TRIE_STUDY
-#define TRIE_STCLASS
-#endif
-
-
-
-#define PBYTE(u8str,paren) ((U8*)(u8str))[(paren) >> 3]
-#define PBITVAL(paren) (1 << ((paren) & 7))
-#define PAREN_TEST(u8str,paren) ( PBYTE(u8str,paren) & PBITVAL(paren))
-#define PAREN_SET(u8str,paren) PBYTE(u8str,paren) |= PBITVAL(paren)
-#define PAREN_UNSET(u8str,paren) PBYTE(u8str,paren) &= (~PBITVAL(paren))
-
-
-/* About scan_data_t.
-
- During optimisation we recurse through the regexp program performing
- various inplace (keyhole style) optimisations. In addition study_chunk
- and scan_commit populate this data structure with information about
- what strings MUST appear in the pattern. We look for the longest
- string that must appear for at a fixed location, and we look for the
- longest string that may appear at a floating location. So for instance
- in the pattern:
-
- /FOO[xX]A.*B[xX]BAR/
-
- Both 'FOO' and 'A' are fixed strings. Both 'B' and 'BAR' are floating
- strings (because they follow a .* construct). study_chunk will identify
- both FOO and BAR as being the longest fixed and floating strings respectively.
-
- The strings can be composites, for instance
-
- /(f)(o)(o)/
-
- will result in a composite fixed substring 'foo'.
-
- For each string some basic information is maintained:
-
- - offset or min_offset
- This is the position the string must appear at, or not before.
- It also implicitly (when combined with minlenp) tells us how many
- character must match before the string we are searching.
- Likewise when combined with minlenp and the length of the string
- tells us how many characters must appear after the string we have
- found.
-
- - max_offset
- Only used for floating strings. This is the rightmost point that
- the string can appear at. Ifset to I32 max it indicates that the
- string can occur infinitely far to the right.
-
- - minlenp
- A pointer to the minimum length of the pattern that the string
- was found inside. This is important as in the case of positive
- lookahead or positive lookbehind we can have multiple patterns
- involved. Consider
-
- /(?=FOO).*F/
-
- The minimum length of the pattern overall is 3, the minimum length
- of the lookahead part is 3, but the minimum length of the part that
- will actually match is 1. So 'FOO's minimum length is 3, but the
- minimum length for the F is 1. This is important as the minimum length
- is used to determine offsets in front of and behind the string being
- looked for. Since strings can be composites this is the length of the
- pattern at the time it was commited with a scan_commit. Note that
- the length is calculated by study_chunk, so that the minimum lengths
- are not known until the full pattern has been compiled, thus the
- pointer to the value.
-
- - lookbehind
-
- In the case of lookbehind the string being searched for can be
- offset past the start point of the final matching string.
- If this value was just blithely removed from the min_offset it would
- invalidate some of the calculations for how many chars must match
- before or after (as they are derived from min_offset and minlen and
- the length of the string being searched for).
- When the final pattern is compiled and the data is moved from the
- scan_data_t structure into the regexp structure the information
- about lookbehind is factored in, with the information that would
- have been lost precalculated in the end_shift field for the
- associated string.
-
- The fields pos_min and pos_delta are used to store the minimum offset
- and the delta to the maximum offset at the current point in the pattern.
-
-*/
-
-typedef struct scan_data_t {
- /*I32 len_min; unused */
- /*I32 len_delta; unused */
- I32 pos_min;
- I32 pos_delta;
- SV *last_found;
- I32 last_end; /* min value, <0 unless valid. */
- I32 last_start_min;
- I32 last_start_max;
- SV **longest; /* Either &l_fixed, or &l_float. */
- SV *longest_fixed; /* longest fixed string found in pattern */
- I32 offset_fixed; /* offset where it starts */
- I32 *minlen_fixed; /* pointer to the minlen relevent to the string */
- I32 lookbehind_fixed; /* is the position of the string modfied by LB */
- SV *longest_float; /* longest floating string found in pattern */
- I32 offset_float_min; /* earliest point in string it can appear */
- I32 offset_float_max; /* latest point in string it can appear */
- I32 *minlen_float; /* pointer to the minlen relevent to the string */
- I32 lookbehind_float; /* is the position of the string modified by LB */
- I32 flags;
- I32 whilem_c;
- I32 *last_closep;
- struct regnode_charclass_class *start_class;
-} scan_data_t;
-
-/*
- * Forward declarations for pregcomp()'s friends.
- */
-
-static const scan_data_t zero_scan_data =
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0};
-
-#define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL)
-#define SF_BEFORE_SEOL 0x0001
-#define SF_BEFORE_MEOL 0x0002
-#define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL)
-#define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL)
-
-#ifdef NO_UNARY_PLUS
-# define SF_FIX_SHIFT_EOL (0+2)
-# define SF_FL_SHIFT_EOL (0+4)
-#else
-# define SF_FIX_SHIFT_EOL (+2)
-# define SF_FL_SHIFT_EOL (+4)
-#endif
-
-#define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL)
-#define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL)
-
-#define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL)
-#define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */
-#define SF_IS_INF 0x0040
-#define SF_HAS_PAR 0x0080
-#define SF_IN_PAR 0x0100
-#define SF_HAS_EVAL 0x0200
-#define SCF_DO_SUBSTR 0x0400
-#define SCF_DO_STCLASS_AND 0x0800
-#define SCF_DO_STCLASS_OR 0x1000
-#define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR)
-#define SCF_WHILEM_VISITED_POS 0x2000
-
-#define SCF_TRIE_RESTUDY 0x4000 /* Do restudy? */
-#define SCF_SEEN_ACCEPT 0x8000
-
-#define UTF (RExC_utf8 != 0)
-#define LOC ((RExC_flags & RXf_PMf_LOCALE) != 0)
-#define FOLD ((RExC_flags & RXf_PMf_FOLD) != 0)
-
-#define OOB_UNICODE 12345678
-#define OOB_NAMEDCLASS -1
-
-#define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b)
-
-
-/* length of regex to show in messages that don't mark a position within */
-#define RegexLengthToShowInErrorMessages 127
-
-/*
- * If MARKER[12] are adjusted, be sure to adjust the constants at the top
- * of t/op/regmesg.t, the tests in t/op/re_tests, and those in
- * op/pragma/warn/regcomp.
- */
-#define MARKER1 "<-- HERE" /* marker as it appears in the description */
-#define MARKER2 " <-- HERE " /* marker as it appears within the regex */
-
-#define REPORT_LOCATION " in regex; marked by " MARKER1 " in m/%.*s" MARKER2 "%s/"
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given
- * arg. Show regex, up to a maximum length. If it's too long, chop and add
- * "...".
- */
-#define _FAIL(code) STMT_START { \
- const char *ellipses = ""; \
- IV len = RExC_end - RExC_precomp; \
- \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- if (len > RegexLengthToShowInErrorMessages) { \
- /* chop 10 shorter than the max, to ensure meaning of "..." */ \
- len = RegexLengthToShowInErrorMessages - 10; \
- ellipses = "..."; \
- } \
- code; \
-} STMT_END
-
-#define FAIL(msg) _FAIL( \
- Perl_croak(aTHX_ "%s in regex m/%.*s%s/", \
- msg, (int)len, RExC_precomp, ellipses))
-
-#define FAIL2(msg,arg) _FAIL( \
- Perl_croak(aTHX_ msg " in regex m/%.*s%s/", \
- arg, (int)len, RExC_precomp, ellipses))
-
-/*
- * Simple_vFAIL -- like FAIL, but marks the current location in the scan
- */
-#define Simple_vFAIL(m) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- Perl_croak(aTHX_ "%s" REPORT_LOCATION, \
- m, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL()
- */
-#define vFAIL(m) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL(m); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts two arguments.
- */
-#define Simple_vFAIL2(m,a1) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2().
- */
-#define vFAIL2(m,a1) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL2(m, a1); \
-} STMT_END
-
-
-/*
- * Like Simple_vFAIL(), but accepts three arguments.
- */
-#define Simple_vFAIL3(m, a1, a2) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3().
- */
-#define vFAIL3(m,a1,a2) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL3(m, a1, a2); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts four arguments.
- */
-#define Simple_vFAIL4(m, a1, a2, a3) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNreg(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNregdep(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_REGEXP), \
- m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN2reg(loc, m, a1) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN3(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN3reg(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN4(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN4reg(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN5(loc, m, a1, a2, a3, a4) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, a4, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-
-/* Allow for side effects in s */
-#define REGC(c,s) STMT_START { \
- if (!SIZE_ONLY) *(s) = (c); else (void)(s); \
-} STMT_END
-
-/* Macros for recording node offsets. 20001227 mjd@plover.com
- * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in
- * element 2*n-1 of the array. Element #2n holds the byte length node #n.
- * Element 0 holds the number n.
- * Position is 1 indexed.
- */
-#ifndef RE_TRACK_PATTERN_OFFSETS
-#define Set_Node_Offset_To_R(node,byte)
-#define Set_Node_Offset(node,byte)
-#define Set_Cur_Node_Offset
-#define Set_Node_Length_To_R(node,len)
-#define Set_Node_Length(node,len)
-#define Set_Node_Cur_Length(node)
-#define Node_Offset(n)
-#define Node_Length(n)
-#define Set_Node_Offset_Length(node,offset,len)
-#define ProgLen(ri) ri->u.proglen
-#define SetProgLen(ri,x) ri->u.proglen = x
-#else
-#define ProgLen(ri) ri->u.offsets[0]
-#define SetProgLen(ri,x) ri->u.offsets[0] = x
-#define Set_Node_Offset_To_R(node,byte) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) offset of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(byte))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Offset macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)-1] = (byte); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Offset(node,byte) \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start)
-#define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse)
-
-#define Set_Node_Length_To_R(node,len) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) size of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(len))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Length macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)] = (len); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Length(node,len) \
- Set_Node_Length_To_R((node)-RExC_emit_start, len)
-#define Set_Cur_Node_Length(len) Set_Node_Length(RExC_emit, len)
-#define Set_Node_Cur_Length(node) \
- Set_Node_Length(node, RExC_parse - parse_start)
-
-/* Get offsets and lengths */
-#define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1])
-#define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)])
-
-#define Set_Node_Offset_Length(node,offset,len) STMT_START { \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (offset)); \
- Set_Node_Length_To_R((node)-RExC_emit_start, (len)); \
-} STMT_END
-#endif
-
-#if PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS
-#define EXPERIMENTAL_INPLACESCAN
-#endif /*RE_TRACK_PATTERN_OFFSETS*/
-
-#define DEBUG_STUDYDATA(str,data,depth) \
-DEBUG_OPTIMISE_MORE_r(if(data){ \
- PerlIO_printf(Perl_debug_log, \
- "%*s" str "Pos:%"IVdf"/%"IVdf \
- " Flags: 0x%"UVXf" Whilem_c: %"IVdf" Lcp: %"IVdf" %s", \
- (int)(depth)*2, "", \
- (IV)((data)->pos_min), \
- (IV)((data)->pos_delta), \
- (UV)((data)->flags), \
- (IV)((data)->whilem_c), \
- (IV)((data)->last_closep ? *((data)->last_closep) : -1), \
- is_inf ? "INF " : "" \
- ); \
- if ((data)->last_found) \
- PerlIO_printf(Perl_debug_log, \
- "Last:'%s' %"IVdf":%"IVdf"/%"IVdf" %sFixed:'%s' @ %"IVdf \
- " %sFloat: '%s' @ %"IVdf"/%"IVdf"", \
- SvPVX_const((data)->last_found), \
- (IV)((data)->last_end), \
- (IV)((data)->last_start_min), \
- (IV)((data)->last_start_max), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_fixed)) ? "*" : "", \
- SvPVX_const((data)->longest_fixed), \
- (IV)((data)->offset_fixed), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_float)) ? "*" : "", \
- SvPVX_const((data)->longest_float), \
- (IV)((data)->offset_float_min), \
- (IV)((data)->offset_float_max) \
- ); \
- PerlIO_printf(Perl_debug_log,"\n"); \
-});
-
-static void clear_re(pTHX_ void *r);
-
-/* Mark that we cannot extend a found fixed substring at this point.
- Update the longest found anchored substring and the longest found
- floating substrings if needed. */
-
-STATIC void
-S_scan_commit(pTHX_ const RExC_state_t *pRExC_state, scan_data_t *data, I32 *minlenp, int is_inf)
-{
- const STRLEN l = CHR_SVLEN(data->last_found);
- const STRLEN old_l = CHR_SVLEN(*data->longest);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_SCAN_COMMIT;
-
- if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) {
- SvSetMagicSV(*data->longest, data->last_found);
- if (*data->longest == data->longest_fixed) {
- data->offset_fixed = l ? data->last_start_min : data->pos_min;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL);
- else
- data->flags &= ~SF_FIX_BEFORE_EOL;
- data->minlen_fixed=minlenp;
- data->lookbehind_fixed=0;
- }
- else { /* *data->longest == data->longest_float */
- data->offset_float_min = l ? data->last_start_min : data->pos_min;
- data->offset_float_max = (l
- ? data->last_start_max
- : data->pos_min + data->pos_delta);
- if (is_inf || (U32)data->offset_float_max > (U32)I32_MAX)
- data->offset_float_max = I32_MAX;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL);
- else
- data->flags &= ~SF_FL_BEFORE_EOL;
- data->minlen_float=minlenp;
- data->lookbehind_float=0;
- }
- }
- SvCUR_set(data->last_found, 0);
- {
- SV * const sv = data->last_found;
- if (SvUTF8(sv) && SvMAGICAL(sv)) {
- MAGIC * const mg = mg_find(sv, PERL_MAGIC_utf8);
- if (mg)
- mg->mg_len = 0;
- }
- }
- data->last_end = -1;
- data->flags &= ~SF_BEFORE_EOL;
- DEBUG_STUDYDATA("commit: ",data,0);
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_anything(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_ANYTHING;
-
- ANYOF_CLASS_ZERO(cl);
- ANYOF_BITMAP_SETALL(cl);
- cl->flags = ANYOF_EOS|ANYOF_UNICODE_ALL;
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* Can match anything (initialization) */
-STATIC int
-S_cl_is_anything(const struct regnode_charclass_class *cl)
-{
- int value;
-
- PERL_ARGS_ASSERT_CL_IS_ANYTHING;
-
- for (value = 0; value <= ANYOF_MAX; value += 2)
- if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1))
- return 1;
- if (!(cl->flags & ANYOF_UNICODE_ALL))
- return 0;
- if (!ANYOF_BITMAP_TESTALLSET((const void*)cl))
- return 0;
- return 1;
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_init(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
-}
-
-STATIC void
-S_cl_init_zero(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT_ZERO;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* 'And' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_and(struct regnode_charclass_class *cl,
- const struct regnode_charclass_class *and_with)
-{
- PERL_ARGS_ASSERT_CL_AND;
-
- assert(and_with->type == ANYOF);
- if (!(and_with->flags & ANYOF_CLASS)
- && !(cl->flags & ANYOF_CLASS)
- && (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(and_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD)) {
- int i;
-
- if (and_with->flags & ANYOF_INVERT)
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= ~and_with->bitmap[i];
- else
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= and_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise, leave it along for a moment. */
- if (!(and_with->flags & ANYOF_EOS))
- cl->flags &= ~ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE_ALL && and_with->flags & ANYOF_UNICODE &&
- !(and_with->flags & ANYOF_INVERT)) {
- cl->flags &= ~ANYOF_UNICODE_ALL;
- cl->flags |= ANYOF_UNICODE;
- ARG_SET(cl, ARG(and_with));
- }
- if (!(and_with->flags & ANYOF_UNICODE_ALL) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE_ALL;
- if (!(and_with->flags & (ANYOF_UNICODE|ANYOF_UNICODE_ALL)) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE;
-}
-
-/* 'OR' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_or(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl, const struct regnode_charclass_class *or_with)
-{
- PERL_ARGS_ASSERT_CL_OR;
-
- if (or_with->flags & ANYOF_INVERT) {
- /* We do not use
- * (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2))
- * <= (B1 | !B2) | (CL1 | !CL2)
- * which is wasteful if CL2 is small, but we ignore CL2:
- * (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1
- * XXXX Can we handle case-fold? Unclear:
- * (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) =
- * (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i'))
- */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(or_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD) ) {
- int i;
-
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= ~or_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise */
- else {
- cl_anything(pRExC_state, cl);
- }
- } else {
- /* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && (!(or_with->flags & ANYOF_FOLD)
- || (cl->flags & ANYOF_FOLD)) ) {
- int i;
-
- /* OR char bitmap and class bitmap separately */
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= or_with->bitmap[i];
- if (or_with->flags & ANYOF_CLASS) {
- for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++)
- cl->classflags[i] |= or_with->classflags[i];
- cl->flags |= ANYOF_CLASS;
- }
- }
- else { /* XXXX: logic is complicated, leave it along for a moment. */
- cl_anything(pRExC_state, cl);
- }
- }
- if (or_with->flags & ANYOF_EOS)
- cl->flags |= ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE && or_with->flags & ANYOF_UNICODE &&
- ARG(cl) != ARG(or_with)) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
- if (or_with->flags & ANYOF_UNICODE_ALL) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
-}
-
-#define TRIE_LIST_ITEM(state,idx) (trie->states[state].trans.list)[ idx ]
-#define TRIE_LIST_CUR(state) ( TRIE_LIST_ITEM( state, 0 ).forid )
-#define TRIE_LIST_LEN(state) ( TRIE_LIST_ITEM( state, 0 ).newstate )
-#define TRIE_LIST_USED(idx) ( trie->states[state].trans.list ? (TRIE_LIST_CUR( idx ) - 1) : 0 )
-
-
-#ifdef DEBUGGING
-/*
- dump_trie(trie,widecharmap,revcharmap)
- dump_trie_interim_list(trie,widecharmap,revcharmap,next_alloc)
- dump_trie_interim_table(trie,widecharmap,revcharmap,next_alloc)
-
- These routines dump out a trie in a somewhat readable format.
- The _interim_ variants are used for debugging the interim
- tables that are used to generate the final compressed
- representation which is what dump_trie expects.
-
- Part of the reason for their existance is to provide a form
- of documentation as to how the different representations function.
-
-*/
-
-/*
- Dumps the final compressed table form of the trie to Perl_debug_log.
- Used for debugging make_trie().
-*/
-
-STATIC void
-S_dump_trie(pTHX_ const struct _reg_trie_data *trie, HV *widecharmap,
- AV *revcharmap, U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE;
-
- PerlIO_printf( Perl_debug_log, "%*sChar : %-6s%-6s%-4s ",
- (int)depth * 2 + 2,"",
- "Match","Base","Ofs" );
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ ) {
- SV ** const tmp = av_fetch( revcharmap, state, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
- PerlIO_printf( Perl_debug_log, "\n%*sState|-----------------------",
- (int)depth * 2 + 2,"");
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ )
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth, "--------");
- PerlIO_printf( Perl_debug_log, "\n");
-
- for( state = 1 ; state < trie->statecount ; state++ ) {
- const U32 base = trie->states[ state ].trans.base;
-
- PerlIO_printf( Perl_debug_log, "%*s#%4"UVXf"|", (int)depth * 2 + 2,"", (UV)state);
-
- if ( trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " W%4X", trie->states[ state ].wordnum );
- } else {
- PerlIO_printf( Perl_debug_log, "%6s", "" );
- }
-
- PerlIO_printf( Perl_debug_log, " @%4"UVXf" ", (UV)base );
-
- if ( base ) {
- U32 ofs = 0;
-
- while( ( base + ofs < trie->uniquecharcount ) ||
- ( base + ofs - trie->uniquecharcount < trie->lasttrans
- && trie->trans[ base + ofs - trie->uniquecharcount ].check != state))
- ofs++;
-
- PerlIO_printf( Perl_debug_log, "+%2"UVXf"[ ", (UV)ofs);
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- PerlIO_printf( Perl_debug_log, "%*"UVXf,
- colwidth,
- (UV)trie->trans[ base + ofs - trie->uniquecharcount ].next );
- } else {
- PerlIO_printf( Perl_debug_log, "%*s",colwidth," ." );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "]");
-
- }
- PerlIO_printf( Perl_debug_log, "\n" );
- }
-}
-/*
- Dumps a fully constructed but uncompressed trie in list form.
- List tries normally only are used for construction when the number of
- possible chars (trie->uniquecharcount) is very high.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_list(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_LIST;
-
- /* print out the table precompression. */
- PerlIO_printf( Perl_debug_log, "%*sState :Word | Transition Data\n%*s%s",
- (int)depth * 2 + 2,"", (int)depth * 2 + 2,"",
- "------:-----+-----------------\n" );
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U16 charid;
-
- PerlIO_printf( Perl_debug_log, "%*s %4"UVXf" :",
- (int)depth * 2 + 2,"", (UV)state );
- if ( ! trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, "%5s| ","");
- } else {
- PerlIO_printf( Perl_debug_log, "W%4x| ",
- trie->states[ state ].wordnum
- );
- }
- for( charid = 1 ; charid <= TRIE_LIST_USED( state ) ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, TRIE_LIST_ITEM(state,charid).forid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s:%3X=%4"UVXf" | ",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- ) ,
- TRIE_LIST_ITEM(state,charid).forid,
- (UV)TRIE_LIST_ITEM(state,charid).newstate
- );
- if (!(charid % 10))
- PerlIO_printf(Perl_debug_log, "\n%*s| ",
- (int)((depth * 2) + 14), "");
- }
- }
- PerlIO_printf( Perl_debug_log, "\n");
- }
-}
-
-/*
- Dumps a fully constructed but uncompressed trie in table form.
- This is the normal DFA style state transition table, with a few
- twists to facilitate compression later.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_table(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- U16 charid;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_TABLE;
-
- /*
- print out the table precompression so that we can do a visual check
- that they are identical.
- */
-
- PerlIO_printf( Perl_debug_log, "%*sChar : ",(int)depth * 2 + 2,"" );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, charid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "\n%*sState+-",(int)depth * 2 + 2,"" );
-
- for( charid=0 ; charid < trie->uniquecharcount ; charid++ ) {
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth,"--------");
- }
-
- PerlIO_printf( Perl_debug_log, "\n" );
-
- for( state=1 ; state < next_alloc ; state += trie->uniquecharcount ) {
-
- PerlIO_printf( Perl_debug_log, "%*s%4"UVXf" : ",
- (int)depth * 2 + 2,"",
- (UV)TRIE_NODENUM( state ) );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- UV v=(UV)SAFE_TRIE_NODENUM( trie->trans[ state + charid ].next );
- if (v)
- PerlIO_printf( Perl_debug_log, "%*"UVXf, colwidth, v );
- else
- PerlIO_printf( Perl_debug_log, "%*s", colwidth, "." );
- }
- if ( ! trie->states[ TRIE_NODENUM( state ) ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf")\n", (UV)trie->trans[ state ].check );
- } else {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf") W%4X\n", (UV)trie->trans[ state ].check,
- trie->states[ TRIE_NODENUM( state ) ].wordnum );
- }
- }
-}
-
-#endif
-
-/* make_trie(startbranch,first,last,tail,word_count,flags,depth)
- startbranch: the first branch in the whole branch sequence
- first : start branch of sequence of branch-exact nodes.
- May be the same as startbranch
- last : Thing following the last branch.
- May be the same as tail.
- tail : item following the branch sequence
- count : words in the sequence
- flags : currently the OP() type we will be building one of /EXACT(|F|Fl)/
- depth : indent depth
-
-Inplace optimizes a sequence of 2 or more Branch-Exact nodes into a TRIE node.
-
-A trie is an N'ary tree where the branches are determined by digital
-decomposition of the key. IE, at the root node you look up the 1st character and
-follow that branch repeat until you find the end of the branches. Nodes can be
-marked as "accepting" meaning they represent a complete word. Eg:
-
- /he|she|his|hers/
-
-would convert into the following structure. Numbers represent states, letters
-following numbers represent valid transitions on the letter from that state, if
-the number is in square brackets it represents an accepting state, otherwise it
-will be in parenthesis.
-
- +-h->+-e->[3]-+-r->(8)-+-s->[9]
- | |
- | (2)
- | |
- (1) +-i->(6)-+-s->[7]
- |
- +-s->(3)-+-h->(4)-+-e->[5]
-
- Accept Word Mapping: 3=>1 (he),5=>2 (she), 7=>3 (his), 9=>4 (hers)
-
-This shows that when matching against the string 'hers' we will begin at state 1
-read 'h' and move to state 2, read 'e' and move to state 3 which is accepting,
-then read 'r' and go to state 8 followed by 's' which takes us to state 9 which
-is also accepting. Thus we know that we can match both 'he' and 'hers' with a
-single traverse. We store a mapping from accepting to state to which word was
-matched, and then when we have multiple possibilities we try to complete the
-rest of the regex in the order in which they occured in the alternation.
-
-The only prior NFA like behaviour that would be changed by the TRIE support is
-the silent ignoring of duplicate alternations which are of the form:
-
- / (DUPE|DUPE) X? (?{ ... }) Y /x
-
-Thus EVAL blocks follwing a trie may be called a different number of times with
-and without the optimisation. With the optimisations dupes will be silently
-ignored. This inconsistant behaviour of EVAL type nodes is well established as
-the following demonstrates:
-
- 'words'=~/(word|word|word)(?{ print $1 })[xyz]/
-
-which prints out 'word' three times, but
-
- 'words'=~/(word|word|word)(?{ print $1 })S/
-
-which doesnt print it out at all. This is due to other optimisations kicking in.
-
-Example of what happens on a structural level:
-
-The regexp /(ac|ad|ab)+/ will produce the folowing debug output:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: BRANCH(8)
- 6: EXACT <ac>(16)
- 8: BRANCH(11)
- 9: EXACT <ad>(16)
- 11: BRANCH(14)
- 12: EXACT <ab>(16)
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-This would be optimizable with startbranch=5, first=5, last=16, tail=16
-and should turn into:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: TRIE(16)
- [Words:3 Chars Stored:6 Unique Chars:4 States:5 NCP:1]
- <ac>
- <ad>
- <ab>
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-Cases where tail != last would be like /(?foo|bar)baz/:
-
- 1: BRANCH(4)
- 2: EXACT <foo>(8)
- 4: BRANCH(7)
- 5: EXACT <bar>(8)
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
-which would be optimizable with startbranch=1, first=1, last=7, tail=8
-and would end up looking like:
-
- 1: TRIE(8)
- [Words:2 Chars Stored:6 Unique Chars:5 States:7 NCP:1]
- <foo>
- <bar>
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
- d = uvuni_to_utf8_flags(d, uv, 0);
-
-is the recommended Unicode-aware way of saying
-
- *(d++) = uv;
-*/
-
-#define TRIE_STORE_REVCHAR \
- STMT_START { \
- if (UTF) { \
- SV *zlopp = newSV(2); \
- unsigned char *flrbbbbb = (unsigned char *) SvPVX(zlopp); \
- unsigned const char *const kapow = uvuni_to_utf8(flrbbbbb, uvc & 0xFF); \
- SvCUR_set(zlopp, kapow - flrbbbbb); \
- SvPOK_on(zlopp); \
- SvUTF8_on(zlopp); \
- av_push(revcharmap, zlopp); \
- } else { \
- char ooooff = (char)uvc; \
- av_push(revcharmap, newSVpvn(&ooooff, 1)); \
- } \
- } STMT_END
-
-#define TRIE_READ_CHAR STMT_START { \
- wordlen++; \
- if ( UTF ) { \
- if ( folder ) { \
- if ( foldlen > 0 ) { \
- uvc = utf8n_to_uvuni( scan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- scan += len; \
- len = 0; \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- scan = foldbuf + UNISKIP( uvc ); \
- } \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- } \
- } else { \
- uvc = (U32)*uc; \
- len = 1; \
- } \
-} STMT_END
-
-
-
-#define TRIE_LIST_PUSH(state,fid,ns) STMT_START { \
- if ( TRIE_LIST_CUR( state ) >=TRIE_LIST_LEN( state ) ) { \
- U32 ging = TRIE_LIST_LEN( state ) *= 2; \
- Renew( trie->states[ state ].trans.list, ging, reg_trie_trans_le ); \
- } \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).forid = fid; \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).newstate = ns; \
- TRIE_LIST_CUR( state )++; \
-} STMT_END
-
-#define TRIE_LIST_NEW(state) STMT_START { \
- Newxz( trie->states[ state ].trans.list, \
- 4, reg_trie_trans_le ); \
- TRIE_LIST_CUR( state ) = 1; \
- TRIE_LIST_LEN( state ) = 4; \
-} STMT_END
-
-#define TRIE_HANDLE_WORD(state) STMT_START { \
- U16 dupe= trie->states[ state ].wordnum; \
- regnode * const noper_next = regnext( noper ); \
- \
- if (trie->wordlen) \
- trie->wordlen[ curword ] = wordlen; \
- DEBUG_r({ \
- /* store the word for dumping */ \
- SV* tmp; \
- if (OP(noper) != NOTHING) \
- tmp = newSVpvn_utf8(STRING(noper), STR_LEN(noper), UTF); \
- else \
- tmp = newSVpvn_utf8( "", 0, UTF ); \
- av_push( trie_words, tmp ); \
- }); \
- \
- curword++; \
- \
- if ( noper_next < tail ) { \
- if (!trie->jump) \
- trie->jump = (U16 *) PerlMemShared_calloc( word_count + 1, sizeof(U16) ); \
- trie->jump[curword] = (U16)(noper_next - convert); \
- if (!jumper) \
- jumper = noper_next; \
- if (!nextbranch) \
- nextbranch= regnext(cur); \
- } \
- \
- if ( dupe ) { \
- /* So it's a dupe. This means we need to maintain a */\
- /* linked-list from the first to the next. */\
- /* we only allocate the nextword buffer when there */\
- /* a dupe, so first time we have to do the allocation */\
- if (!trie->nextword) \
- trie->nextword = (U16 *) \
- PerlMemShared_calloc( word_count + 1, sizeof(U16)); \
- while ( trie->nextword[dupe] ) \
- dupe= trie->nextword[dupe]; \
- trie->nextword[dupe]= curword; \
- } else { \
- /* we haven't inserted this word yet. */ \
- trie->states[ state ].wordnum = curword; \
- } \
-} STMT_END
-
-
-#define TRIE_TRANS_STATE(state,base,ucharcount,charid,special) \
- ( ( base + charid >= ucharcount \
- && base + charid < ubound \
- && state == trie->trans[ base - ucharcount + charid ].check \
- && trie->trans[ base - ucharcount + charid ].next ) \
- ? trie->trans[ base - ucharcount + charid ].next \
- : ( state==1 ? special : 0 ) \
- )
-
-#define MADE_TRIE 1
-#define MADE_JUMP_TRIE 2
-#define MADE_EXACT_TRIE 4
-
-STATIC I32
-S_make_trie(pTHX_ RExC_state_t *pRExC_state, regnode *startbranch, regnode *first, regnode *last, regnode *tail, U32 word_count, U32 flags, U32 depth)
-{
- dVAR;
- /* first pass, loop through and scan words */
- reg_trie_data *trie;
- HV *widecharmap = NULL;
- AV *revcharmap = newAV();
- regnode *cur;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- STRLEN len = 0;
- UV uvc = 0;
- U16 curword = 0;
- U32 next_alloc = 0;
- regnode *jumper = NULL;
- regnode *nextbranch = NULL;
- regnode *convert = NULL;
- /* we just use folder as a flag in utf8 */
- const U8 * const folder = ( flags == EXACTF
- ? PL_fold
- : ( flags == EXACTFL
- ? PL_fold_locale
- : NULL
- )
- );
-
-#ifdef DEBUGGING
- const U32 data_slot = add_data( pRExC_state, 4, "tuuu" );
- AV *trie_words = NULL;
- /* along with revcharmap, this only used during construction but both are
- * useful during debugging so we store them in the struct when debugging.
- */
-#else
- const U32 data_slot = add_data( pRExC_state, 2, "tu" );
- STRLEN trie_charcount=0;
-#endif
- SV *re_trie_maxbuff;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- trie = (reg_trie_data *) PerlMemShared_calloc( 1, sizeof(reg_trie_data) );
- trie->refcount = 1;
- trie->startstate = 1;
- trie->wordcount = word_count;
- RExC_rxi->data->data[ data_slot ] = (void*)trie;
- trie->charmap = (U16 *) PerlMemShared_calloc( 256, sizeof(U16) );
- if (!(UTF && folder))
- trie->bitmap = (char *) PerlMemShared_calloc( ANYOF_BITMAP_SIZE, 1 );
- DEBUG_r({
- trie_words = newAV();
- });
-
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff)) {
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- DEBUG_OPTIMISE_r({
- PerlIO_printf( Perl_debug_log,
- "%*smake_trie start==%d, first==%d, last==%d, tail==%d depth=%d\n",
- (int)depth * 2 + 2, "",
- REG_NODE_NUM(startbranch),REG_NODE_NUM(first),
- REG_NODE_NUM(last), REG_NODE_NUM(tail),
- (int)depth);
- });
-
- /* Find the node we are going to overwrite */
- if ( first == startbranch && OP( last ) != BRANCH ) {
- /* whole branch chain */
- convert = first;
- } else {
- /* branch sub-chain */
- convert = NEXTOPER( first );
- }
-
- /* -- First loop and Setup --
-
- We first traverse the branches and scan each word to determine if it
- contains widechars, and how many unique chars there are, this is
- important as we have to build a table with at least as many columns as we
- have unique chars.
-
- We use an array of integers to represent the character codes 0..255
- (trie->charmap) and we use a an HV* to store Unicode characters. We use the
- native representation of the character value as the key and IV's for the
- coded index.
-
- *TODO* If we keep track of how many times each character is used we can
- remap the columns so that the table compression later on is more
- efficient in terms of memory by ensuring most common value is in the
- middle and the least common are on the outside. IMO this would be better
- than a most to least common mapping as theres a decent chance the most
- common letter will share a node with the least common, meaning the node
- will not be compressable. With a middle is most common approach the worst
- case is when we have the least common nodes twice.
-
- */
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- STRLEN foldlen = 0;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- const U8 *scan = (U8*)NULL;
- U32 wordlen = 0; /* required init */
- STRLEN chars = 0;
- bool set_bit = trie->bitmap ? 1 : 0; /*store the first char in the bitmap?*/
-
- if (OP(noper) == NOTHING) {
- trie->minlen= 0;
- continue;
- }
- if ( set_bit ) /* bitmap only alloced when !(UTF&&Folding) */
- TRIE_BITMAP_SET(trie,*uc); /* store the raw first byte
- regardless of encoding */
-
- for ( ; uc < e ; uc += len ) {
- TRIE_CHARCOUNT(trie)++;
- TRIE_READ_CHAR;
- chars++;
- if ( uvc < 256 ) {
- if ( !trie->charmap[ uvc ] ) {
- trie->charmap[ uvc ]=( ++trie->uniquecharcount );
- if ( folder )
- trie->charmap[ folder[ uvc ] ] = trie->charmap[ uvc ];
- TRIE_STORE_REVCHAR;
- }
- if ( set_bit ) {
- /* store the codepoint in the bitmap, and if its ascii
- also store its folded equivelent. */
- TRIE_BITMAP_SET(trie,uvc);
-
- /* store the folded codepoint */
- if ( folder ) TRIE_BITMAP_SET(trie,folder[ uvc ]);
-
- if ( !UTF ) {
- /* store first byte of utf8 representation of
- codepoints in the 127 < uvc < 256 range */
- if (127 < uvc && uvc < 192) {
- TRIE_BITMAP_SET(trie,194);
- } else if (191 < uvc ) {
- TRIE_BITMAP_SET(trie,195);
- /* && uvc < 256 -- we know uvc is < 256 already */
- }
- }
- set_bit = 0; /* We've done our bit :-) */
- }
- } else {
- SV** svpp;
- if ( !widecharmap )
- widecharmap = newHV();
-
- svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 1 );
-
- if ( !svpp )
- Perl_croak( aTHX_ "error creating/fetching widecharmap entry for 0x%"UVXf, uvc );
-
- if ( !SvTRUE( *svpp ) ) {
- sv_setiv( *svpp, ++trie->uniquecharcount );
- TRIE_STORE_REVCHAR;
- }
- }
- }
- if( cur == first ) {
- trie->minlen=chars;
- trie->maxlen=chars;
- } else if (chars < trie->minlen) {
- trie->minlen=chars;
- } else if (chars > trie->maxlen) {
- trie->maxlen=chars;
- }
-
- } /* end first pass */
- DEBUG_TRIE_COMPILE_r(
- PerlIO_printf( Perl_debug_log, "%*sTRIE(%s): W:%d C:%d Uq:%d Min:%d Max:%d\n",
- (int)depth * 2 + 2,"",
- ( widecharmap ? "UTF8" : "NATIVE" ), (int)word_count,
- (int)TRIE_CHARCOUNT(trie), trie->uniquecharcount,
- (int)trie->minlen, (int)trie->maxlen )
- );
- trie->wordlen = (U32 *) PerlMemShared_calloc( word_count, sizeof(U32) );
-
- /*
- We now know what we are dealing with in terms of unique chars and
- string sizes so we can calculate how much memory a naive
- representation using a flat table will take. If it's over a reasonable
- limit (as specified by ${^RE_TRIE_MAXBUF}) we use a more memory
- conservative but potentially much slower representation using an array
- of lists.
-
- At the end we convert both representations into the same compressed
- form that will be used in regexec.c for matching with. The latter
- is a form that cannot be used to construct with but has memory
- properties similar to the list form and access properties similar
- to the table form making it both suitable for fast searches and
- small enough that its feasable to store for the duration of a program.
-
- See the comment in the code where the compressed table is produced
- inplace from the flat tabe representation for an explanation of how
- the compression works.
-
- */
-
-
- if ( (IV)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1) > SvIV(re_trie_maxbuff) ) {
- /*
- Second Pass -- Array Of Lists Representation
-
- Each state will be represented by a list of charid:state records
- (reg_trie_trans_le) the first such element holds the CUR and LEN
- points of the allocated array. (See defines above).
-
- We build the initial structure using the lists, and then convert
- it into the compressed table form which allows faster lookups
- (but cant be modified once converted).
- */
-
- STRLEN transcount = 1;
-
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using list compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- TRIE_LIST_NEW(1);
- next_alloc = 2;
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- U32 state = 1; /* required init */
- U16 charid = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if (OP(noper) != NOTHING) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV** const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- if ( !svpp ) {
- charid = 0;
- } else {
- charid=(U16)SvIV( *svpp );
- }
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- if ( charid ) {
-
- U16 check;
- U32 newstate = 0;
-
- charid--;
- if ( !trie->states[ state ].trans.list ) {
- TRIE_LIST_NEW( state );
- }
- for ( check = 1; check <= TRIE_LIST_USED( state ); check++ ) {
- if ( TRIE_LIST_ITEM( state, check ).forid == charid ) {
- newstate = TRIE_LIST_ITEM( state, check ).newstate;
- break;
- }
- }
- if ( ! newstate ) {
- newstate = next_alloc++;
- TRIE_LIST_PUSH( state, charid, newstate );
- transcount++;
- }
- state = newstate;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- }
- }
- TRIE_HANDLE_WORD(state);
-
- } /* end second pass */
-
- /* next alloc is the NEXT state to be allocated */
- trie->statecount = next_alloc;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states,
- next_alloc
- * sizeof(reg_trie_state) );
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_list(trie, widecharmap,
- revcharmap, next_alloc,
- depth+1)
- );
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( transcount, sizeof(reg_trie_trans) );
- {
- U32 state;
- U32 tp = 0;
- U32 zp = 0;
-
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U32 base=0;
-
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, "tp: %d zp: %d ",tp,zp)
- );
- */
-
- if (trie->states[state].trans.list) {
- U16 minid=TRIE_LIST_ITEM( state, 1).forid;
- U16 maxid=minid;
- U16 idx;
-
- for( idx = 2 ; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U16 forid = TRIE_LIST_ITEM( state, idx).forid;
- if ( forid < minid ) {
- minid=forid;
- } else if ( forid > maxid ) {
- maxid=forid;
- }
- }
- if ( transcount < tp + maxid - minid + 1) {
- transcount *= 2;
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans,
- transcount
- * sizeof(reg_trie_trans) );
- Zero( trie->trans + (transcount / 2), transcount / 2 , reg_trie_trans );
- }
- base = trie->uniquecharcount + tp - minid;
- if ( maxid == minid ) {
- U32 set = 0;
- for ( ; zp < tp ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- base = trie->uniquecharcount + zp - minid;
- trie->trans[ zp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ zp ].check = state;
- set = 1;
- break;
- }
- }
- if ( !set ) {
- trie->trans[ tp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ tp ].check = state;
- tp++;
- zp = tp;
- }
- } else {
- for ( idx=1; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U32 tid = base - trie->uniquecharcount + TRIE_LIST_ITEM( state, idx ).forid;
- trie->trans[ tid ].next = TRIE_LIST_ITEM( state, idx ).newstate;
- trie->trans[ tid ].check = state;
- }
- tp += ( maxid - minid + 1 );
- }
- Safefree(trie->states[ state ].trans.list);
- }
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, " base: %d\n",base);
- );
- */
- trie->states[ state ].trans.base=base;
- }
- trie->lasttrans = tp + 1;
- }
- } else {
- /*
- Second Pass -- Flat Table Representation.
-
- we dont use the 0 slot of either trans[] or states[] so we add 1 to each.
- We know that we will need Charcount+1 trans at most to store the data
- (one row per char at worst case) So we preallocate both structures
- assuming worst case.
-
- We then construct the trie using only the .next slots of the entry
- structs.
-
- We use the .check field of the first entry of the node temporarily to
- make compression both faster and easier by keeping track of how many non
- zero fields are in the node.
-
- Since trans are numbered from 1 any 0 pointer in the table is a FAIL
- transition.
-
- There are two terms at use here: state as a TRIE_NODEIDX() which is a
- number representing the first entry of the node, and state as a
- TRIE_NODENUM() which is the trans number. state 1 is TRIE_NODEIDX(1) and
- TRIE_NODENUM(1), state 2 is TRIE_NODEIDX(2) and TRIE_NODENUM(3) if there
- are 2 entrys per node. eg:
-
- A B A B
- 1. 2 4 1. 3 7
- 2. 0 3 3. 0 5
- 3. 0 0 5. 0 0
- 4. 0 0 7. 0 0
-
- The table is internally in the right hand, idx form. However as we also
- have to deal with the states array which is indexed by nodenum we have to
- use TRIE_NODENUM() to convert.
-
- */
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using table compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( ( TRIE_CHARCOUNT(trie) + 1 )
- * trie->uniquecharcount + 1,
- sizeof(reg_trie_trans) );
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- next_alloc = trie->uniquecharcount + 1;
-
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
-
- U32 state = 1; /* required init */
-
- U16 charid = 0; /* sanity init */
- U32 accept_state = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
-
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if ( OP(noper) != NOTHING ) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV* const * const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- charid = svpp ? (U16)SvIV(*svpp) : 0;
- }
- if ( charid ) {
- charid--;
- if ( !trie->trans[ state + charid ].next ) {
- trie->trans[ state + charid ].next = next_alloc;
- trie->trans[ state ].check++;
- next_alloc += trie->uniquecharcount;
- }
- state = trie->trans[ state + charid ].next;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- }
- }
- accept_state = TRIE_NODENUM( state );
- TRIE_HANDLE_WORD(accept_state);
-
- } /* end second pass */
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_table(trie, widecharmap,
- revcharmap,
- next_alloc, depth+1));
-
- {
- /*
- * Inplace compress the table.*
-
- For sparse data sets the table constructed by the trie algorithm will
- be mostly 0/FAIL transitions or to put it another way mostly empty.
- (Note that leaf nodes will not contain any transitions.)
-
- This algorithm compresses the tables by eliminating most such
- transitions, at the cost of a modest bit of extra work during lookup:
-
- - Each states[] entry contains a .base field which indicates the
- index in the state[] array wheres its transition data is stored.
-
- - If .base is 0 there are no valid transitions from that node.
-
- - If .base is nonzero then charid is added to it to find an entry in
- the trans array.
-
- -If trans[states[state].base+charid].check!=state then the
- transition is taken to be a 0/Fail transition. Thus if there are fail
- transitions at the front of the node then the .base offset will point
- somewhere inside the previous nodes data (or maybe even into a node
- even earlier), but the .check field determines if the transition is
- valid.
-
- XXX - wrong maybe?
- The following process inplace converts the table to the compressed
- table: We first do not compress the root node 1,and mark its all its
- .check pointers as 1 and set its .base pointer as 1 as well. This
- allows to do a DFA construction from the compressed table later, and
- ensures that any .base pointers we calculate later are greater than
- 0.
-
- - We set 'pos' to indicate the first entry of the second node.
-
- - We then iterate over the columns of the node, finding the first and
- last used entry at l and m. We then copy l..m into pos..(pos+m-l),
- and set the .check pointers accordingly, and advance pos
- appropriately and repreat for the next node. Note that when we copy
- the next pointers we have to convert them from the original
- NODEIDX form to NODENUM form as the former is not valid post
- compression.
-
- - If a node has no transitions used we mark its base as 0 and do not
- advance the pos pointer.
-
- - If a node only has one transition we use a second pointer into the
- structure to fill in allocated fail transitions from other states.
- This pointer is independent of the main pointer and scans forward
- looking for null transitions that are allocated to a state. When it
- finds one it writes the single transition into the "hole". If the
- pointer doesnt find one the single transition is appended as normal.
-
- - Once compressed we can Renew/realloc the structures to release the
- excess space.
-
- See "Table-Compression Methods" in sec 3.9 of the Red Dragon,
- specifically Fig 3.47 and the associated pseudocode.
-
- demq
- */
- const U32 laststate = TRIE_NODENUM( next_alloc );
- U32 state, charid;
- U32 pos = 0, zp=0;
- trie->statecount = laststate;
-
- for ( state = 1 ; state < laststate ; state++ ) {
- U8 flag = 0;
- const U32 stateidx = TRIE_NODEIDX( state );
- const U32 o_used = trie->trans[ stateidx ].check;
- U32 used = trie->trans[ stateidx ].check;
- trie->trans[ stateidx ].check = 0;
-
- for ( charid = 0 ; used && charid < trie->uniquecharcount ; charid++ ) {
- if ( flag || trie->trans[ stateidx + charid ].next ) {
- if ( trie->trans[ stateidx + charid ].next ) {
- if (o_used == 1) {
- for ( ; zp < pos ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- break;
- }
- }
- trie->states[ state ].trans.base = zp + trie->uniquecharcount - charid ;
- trie->trans[ zp ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ zp ].check = state;
- if ( ++zp > pos ) pos = zp;
- break;
- }
- used--;
- }
- if ( !flag ) {
- flag = 1;
- trie->states[ state ].trans.base = pos + trie->uniquecharcount - charid ;
- }
- trie->trans[ pos ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ pos ].check = state;
- pos++;
- }
- }
- }
- trie->lasttrans = pos + 1;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states, laststate
- * sizeof(reg_trie_state) );
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log,
- "%*sAlloc: %d Orig: %"IVdf" elements, Final:%"IVdf". Savings of %%%5.2f\n",
- (int)depth * 2 + 2,"",
- (int)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1 ),
- (IV)next_alloc,
- (IV)pos,
- ( ( next_alloc - pos ) * 100 ) / (double)next_alloc );
- );
-
- } /* end table compress */
- }
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf(Perl_debug_log, "%*sStatecount:%"UVxf" Lasttrans:%"UVxf"\n",
- (int)depth * 2 + 2, "",
- (UV)trie->statecount,
- (UV)trie->lasttrans)
- );
- /* resize the trans array to remove unused space */
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans, trie->lasttrans
- * sizeof(reg_trie_trans) );
-
- /* and now dump out the compressed format */
- DEBUG_TRIE_COMPILE_r(dump_trie(trie, widecharmap, revcharmap, depth+1));
-
- { /* Modify the program and insert the new TRIE node*/
- U8 nodetype =(U8)(flags & 0xFF);
- char *str=NULL;
-
-#ifdef DEBUGGING
- regnode *optimize = NULL;
-#ifdef RE_TRACK_PATTERN_OFFSETS
-
- U32 mjd_offset = 0;
- U32 mjd_nodelen = 0;
-#endif /* RE_TRACK_PATTERN_OFFSETS */
-#endif /* DEBUGGING */
- /*
- This means we convert either the first branch or the first Exact,
- depending on whether the thing following (in 'last') is a branch
- or not and whther first is the startbranch (ie is it a sub part of
- the alternation or is it the whole thing.)
- Assuming its a sub part we conver the EXACT otherwise we convert
- the whole branch sequence, including the first.
- */
- /* Find the node we are going to overwrite */
- if ( first != startbranch || OP( last ) == BRANCH ) {
- /* branch sub-chain */
- NEXT_OFF( first ) = (U16)(last - first);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_r({
- mjd_offset= Node_Offset((convert));
- mjd_nodelen= Node_Length((convert));
- });
-#endif
- /* whole branch chain */
- }
-#ifdef RE_TRACK_PATTERN_OFFSETS
- else {
- DEBUG_r({
- const regnode *nop = NEXTOPER( convert );
- mjd_offset= Node_Offset((nop));
- mjd_nodelen= Node_Length((nop));
- });
- }
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%*sMJD offset:%"UVuf" MJD length:%"UVuf"\n",
- (int)depth * 2 + 2, "",
- (UV)mjd_offset, (UV)mjd_nodelen)
- );
-#endif
- /* But first we check to see if there is a common prefix we can
- split out as an EXACT and put in front of the TRIE node. */
- trie->startstate= 1;
- if ( trie->bitmap && !widecharmap && !trie->jump ) {
- U32 state;
- for ( state = 1 ; state < trie->statecount-1 ; state++ ) {
- U32 ofs = 0;
- I32 idx = -1;
- U32 count = 0;
- const U32 base = trie->states[ state ].trans.base;
-
- if ( trie->states[state].wordnum )
- count = 1;
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- if ( ++count > 1 ) {
- SV **tmp = av_fetch( revcharmap, ofs, 0);
- const U8 *ch = (U8*)SvPV_nolen_const( *tmp );
- if ( state == 1 ) break;
- if ( count == 2 ) {
- Zero(trie->bitmap, ANYOF_BITMAP_SIZE, char);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*sNew Start State=%"UVuf" Class: [",
- (int)depth * 2 + 2, "",
- (UV)state));
- if (idx >= 0) {
- SV ** const tmp = av_fetch( revcharmap, idx, 0);
- const U8 * const ch = (U8*)SvPV_nolen_const( *tmp );
-
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie, folder[ *ch ]);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%s", (char*)ch)
- );
- }
- }
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie,folder[ *ch ]);
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"%s", ch));
- }
- idx = ofs;
- }
- }
- if ( count == 1 ) {
- SV **tmp = av_fetch( revcharmap, idx, 0);
- STRLEN len;
- char *ch = SvPV( *tmp, len );
- DEBUG_OPTIMISE_r({
- SV *sv=sv_newmortal();
- PerlIO_printf( Perl_debug_log,
- "%*sPrefix State: %"UVuf" Idx:%"UVuf" Char='%s'\n",
- (int)depth * 2 + 2, "",
- (UV)state, (UV)idx,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 6,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- });
- if ( state==1 ) {
- OP( convert ) = nodetype;
- str=STRING(convert);
- STR_LEN(convert)=0;
- }
- STR_LEN(convert) += len;
- while (len--)
- *str++ = *ch++;
- } else {
-#ifdef DEBUGGING
- if (state>1)
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"]\n"));
-#endif
- break;
- }
- }
- if (str) {
- regnode *n = convert+NODE_SZ_STR(convert);
- NEXT_OFF(convert) = NODE_SZ_STR(convert);
- trie->startstate = state;
- trie->minlen -= (state - 1);
- trie->maxlen -= (state - 1);
-#ifdef DEBUGGING
- /* At least the UNICOS C compiler choked on this
- * being argument to DEBUG_r(), so let's just have
- * it right here. */
- if (
-#ifdef PERL_EXT_RE_BUILD
- 1
-#else
- DEBUG_r_TEST
-#endif
- ) {
- regnode *fix = convert;
- U32 word = trie->wordcount;
- mjd_nodelen++;
- Set_Node_Offset_Length(convert, mjd_offset, state - 1);
- while( ++fix < n ) {
- Set_Node_Offset_Length(fix, 0, 0);
- }
- while (word--) {
- SV ** const tmp = av_fetch( trie_words, word, 0 );
- if (tmp) {
- if ( STR_LEN(convert) <= SvCUR(*tmp) )
- sv_chop(*tmp, SvPV_nolen(*tmp) + STR_LEN(convert));
- else
- sv_chop(*tmp, SvPV_nolen(*tmp) + SvCUR(*tmp));
- }
- }
- }
-#endif
- if (trie->maxlen) {
- convert = n;
- } else {
- NEXT_OFF(convert) = (U16)(tail - convert);
- DEBUG_r(optimize= n);
- }
- }
- }
- if (!jumper)
- jumper = last;
- if ( trie->maxlen ) {
- NEXT_OFF( convert ) = (U16)(tail - convert);
- ARG_SET( convert, data_slot );
- /* Store the offset to the first unabsorbed branch in
- jump[0], which is otherwise unused by the jump logic.
- We use this when dumping a trie and during optimisation. */
- if (trie->jump)
- trie->jump[0] = (U16)(nextbranch - convert);
-
- /* XXXX */
- if ( !trie->states[trie->startstate].wordnum && trie->bitmap &&
- ( (char *)jumper - (char *)convert) >= (int)sizeof(struct regnode_charclass) )
- {
- OP( convert ) = TRIEC;
- Copy(trie->bitmap, ((struct regnode_charclass *)convert)->bitmap, ANYOF_BITMAP_SIZE, char);
- PerlMemShared_free(trie->bitmap);
- trie->bitmap= NULL;
- } else
- OP( convert ) = TRIE;
-
- /* store the type in the flags */
- convert->flags = nodetype;
- DEBUG_r({
- optimize = convert
- + NODE_STEP_REGNODE
- + regarglen[ OP( convert ) ];
- });
- /* XXX We really should free up the resource in trie now,
- as we won't use them - (which resources?) dmq */
- }
- /* needed for dumping*/
- DEBUG_r(if (optimize) {
- regnode *opt = convert;
-
- while ( ++opt < optimize) {
- Set_Node_Offset_Length(opt,0,0);
- }
- /*
- Try to clean up some of the debris left after the
- optimisation.
- */
- while( optimize < jumper ) {
- mjd_nodelen += Node_Length((optimize));
- OP( optimize ) = OPTIMIZED;
- Set_Node_Offset_Length(optimize,0,0);
- optimize++;
- }
- Set_Node_Offset_Length(convert,mjd_offset,mjd_nodelen);
- });
- } /* end node insert */
- RExC_rxi->data->data[ data_slot + 1 ] = (void*)widecharmap;
-#ifdef DEBUGGING
- RExC_rxi->data->data[ data_slot + TRIE_WORDS_OFFSET ] = (void*)trie_words;
- RExC_rxi->data->data[ data_slot + 3 ] = (void*)revcharmap;
-#else
- SvREFCNT_dec(revcharmap);
-#endif
- return trie->jump
- ? MADE_JUMP_TRIE
- : trie->startstate>1
- ? MADE_EXACT_TRIE
- : MADE_TRIE;
-}
-
-STATIC void
-S_make_trie_failtable(pTHX_ RExC_state_t *pRExC_state, regnode *source, regnode *stclass, U32 depth)
-{
-/* The Trie is constructed and compressed now so we can build a fail array now if its needed
-
- This is basically the Aho-Corasick algorithm. Its from exercise 3.31 and 3.32 in the
- "Red Dragon" -- Compilers, principles, techniques, and tools. Aho, Sethi, Ullman 1985/88
- ISBN 0-201-10088-6
-
- We find the fail state for each state in the trie, this state is the longest proper
- suffix of the current states 'word' that is also a proper prefix of another word in our
- trie. State 1 represents the word '' and is the thus the default fail state. This allows
- the DFA not to have to restart after its tried and failed a word at a given point, it
- simply continues as though it had been matching the other word in the first place.
- Consider
- 'abcdgu'=~/abcdefg|cdgu/
- When we get to 'd' we are still matching the first word, we would encounter 'g' which would
- fail, which would bring use to the state representing 'd' in the second word where we would
- try 'g' and succeed, prodceding to match 'cdgu'.
- */
- /* add a fail transition */
- const U32 trie_offset = ARG(source);
- reg_trie_data *trie=(reg_trie_data *)RExC_rxi->data->data[trie_offset];
- U32 *q;
- const U32 ucharcount = trie->uniquecharcount;
- const U32 numstates = trie->statecount;
- const U32 ubound = trie->lasttrans + ucharcount;
- U32 q_read = 0;
- U32 q_write = 0;
- U32 charid;
- U32 base = trie->states[ 1 ].trans.base;
- U32 *fail;
- reg_ac_data *aho;
- const U32 data_slot = add_data( pRExC_state, 1, "T" );
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE_FAILTABLE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
-
- ARG_SET( stclass, data_slot );
- aho = (reg_ac_data *) PerlMemShared_calloc( 1, sizeof(reg_ac_data) );
- RExC_rxi->data->data[ data_slot ] = (void*)aho;
- aho->trie=trie_offset;
- aho->states=(reg_trie_state *)PerlMemShared_malloc( numstates * sizeof(reg_trie_state) );
- Copy( trie->states, aho->states, numstates, reg_trie_state );
- Newxz( q, numstates, U32);
- aho->fail = (U32 *) PerlMemShared_calloc( numstates, sizeof(U32) );
- aho->refcount = 1;
- fail = aho->fail;
- /* initialize fail[0..1] to be 1 so that we always have
- a valid final fail state */
- fail[ 0 ] = fail[ 1 ] = 1;
-
- for ( charid = 0; charid < ucharcount ; charid++ ) {
- const U32 newstate = TRIE_TRANS_STATE( 1, base, ucharcount, charid, 0 );
- if ( newstate ) {
- q[ q_write ] = newstate;
- /* set to point at the root */
- fail[ q[ q_write++ ] ]=1;
- }
- }
- while ( q_read < q_write) {
- const U32 cur = q[ q_read++ % numstates ];
- base = trie->states[ cur ].trans.base;
-
- for ( charid = 0 ; charid < ucharcount ; charid++ ) {
- const U32 ch_state = TRIE_TRANS_STATE( cur, base, ucharcount, charid, 1 );
- if (ch_state) {
- U32 fail_state = cur;
- U32 fail_base;
- do {
- fail_state = fail[ fail_state ];
- fail_base = aho->states[ fail_state ].trans.base;
- } while ( !TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ) );
-
- fail_state = TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 );
- fail[ ch_state ] = fail_state;
- if ( !aho->states[ ch_state ].wordnum && aho->states[ fail_state ].wordnum )
- {
- aho->states[ ch_state ].wordnum = aho->states[ fail_state ].wordnum;
- }
- q[ q_write++ % numstates] = ch_state;
- }
- }
- }
- /* restore fail[0..1] to 0 so that we "fall out" of the AC loop
- when we fail in state 1, this allows us to use the
- charclass scan to find a valid start char. This is based on the principle
- that theres a good chance the string being searched contains lots of stuff
- that cant be a start char.
- */
- fail[ 0 ] = fail[ 1 ] = 0;
- DEBUG_TRIE_COMPILE_r({
- PerlIO_printf(Perl_debug_log,
- "%*sStclass Failtable (%"UVuf" states): 0",
- (int)(depth * 2), "", (UV)numstates
- );
- for( q_read=1; q_read<numstates; q_read++ ) {
- PerlIO_printf(Perl_debug_log, ", %"UVuf, (UV)fail[q_read]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
- Safefree(q);
- /*RExC_seen |= REG_SEEN_TRIEDFA;*/
-}
-
-
-/*
- * There are strange code-generation bugs caused on sparc64 by gcc-2.95.2.
- * These need to be revisited when a newer toolchain becomes available.
- */
-#if defined(__sparc64__) && defined(__GNUC__)
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
-# undef SPARC64_GCC_WORKAROUND
-# define SPARC64_GCC_WORKAROUND 1
-# endif
-#endif
-
-#define DEBUG_PEEP(str,scan,depth) \
- DEBUG_OPTIMISE_r({if (scan){ \
- SV * const mysv=sv_newmortal(); \
- regnode *Next = regnext(scan); \
- regprop(RExC_rx, mysv, scan); \
- PerlIO_printf(Perl_debug_log, "%*s" str ">%3d: %s (%d)\n", \
- (int)depth*2, "", REG_NODE_NUM(scan), SvPV_nolen_const(mysv),\
- Next ? (REG_NODE_NUM(Next)) : 0 ); \
- }});
-
-
-
-
-
-#define JOIN_EXACT(scan,min,flags) \
- if (PL_regkind[OP(scan)] == EXACT) \
- join_exact(pRExC_state,(scan),(min),(flags),NULL,depth+1)
-
-STATIC U32
-S_join_exact(pTHX_ RExC_state_t *pRExC_state, regnode *scan, I32 *min, U32 flags,regnode *val, U32 depth) {
- /* Merge several consecutive EXACTish nodes into one. */
- regnode *n = regnext(scan);
- U32 stringok = 1;
- regnode *next = scan + NODE_SZ_STR(scan);
- U32 merged = 0;
- U32 stopnow = 0;
-#ifdef DEBUGGING
- regnode *stop = scan;
- GET_RE_DEBUG_FLAGS_DECL;
-#else
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_JOIN_EXACT;
-#ifndef EXPERIMENTAL_INPLACESCAN
- PERL_UNUSED_ARG(flags);
- PERL_UNUSED_ARG(val);
-#endif
- DEBUG_PEEP("join",scan,depth);
-
- /* Skip NOTHING, merge EXACT*. */
- while (n &&
- ( PL_regkind[OP(n)] == NOTHING ||
- (stringok && (OP(n) == OP(scan))))
- && NEXT_OFF(n)
- && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) {
-
- if (OP(n) == TAIL || n > next)
- stringok = 0;
- if (PL_regkind[OP(n)] == NOTHING) {
- DEBUG_PEEP("skip:",n,depth);
- NEXT_OFF(scan) += NEXT_OFF(n);
- next = n + NODE_STEP_REGNODE;
-#ifdef DEBUGGING
- if (stringok)
- stop = n;
-#endif
- n = regnext(n);
- }
- else if (stringok) {
- const unsigned int oldl = STR_LEN(scan);
- regnode * const nnext = regnext(n);
-
- DEBUG_PEEP("merg",n,depth);
-
- merged++;
- if (oldl + STR_LEN(n) > U8_MAX)
- break;
- NEXT_OFF(scan) += NEXT_OFF(n);
- STR_LEN(scan) += STR_LEN(n);
- next = n + NODE_SZ_STR(n);
- /* Now we can overwrite *n : */
- Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char);
-#ifdef DEBUGGING
- stop = next - 1;
-#endif
- n = nnext;
- if (stopnow) break;
- }
-
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (flags && !NEXT_OFF(n)) {
- DEBUG_PEEP("atch", val, depth);
- if (reg_off_by_arg[OP(n)]) {
- ARG_SET(n, val - n);
- }
- else {
- NEXT_OFF(n) = val - n;
- }
- stopnow = 1;
- }
-#endif
- }
-
- if (UTF && ( OP(scan) == EXACTF ) && ( STR_LEN(scan) >= 6 ) ) {
- /*
- Two problematic code points in Unicode casefolding of EXACT nodes:
-
- U+0390 - GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS
- U+03B0 - GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS
-
- which casefold to
-
- Unicode UTF-8
-
- U+03B9 U+0308 U+0301 0xCE 0xB9 0xCC 0x88 0xCC 0x81
- U+03C5 U+0308 U+0301 0xCF 0x85 0xCC 0x88 0xCC 0x81
-
- This means that in case-insensitive matching (or "loose matching",
- as Unicode calls it), an EXACTF of length six (the UTF-8 encoded byte
- length of the above casefolded versions) can match a target string
- of length two (the byte length of UTF-8 encoded U+0390 or U+03B0).
- This would rather mess up the minimum length computation.
-
- What we'll do is to look for the tail four bytes, and then peek
- at the preceding two bytes to see whether we need to decrease
- the minimum length by four (six minus two).
-
- Thanks to the design of UTF-8, there cannot be false matches:
- A sequence of valid UTF-8 bytes cannot be a subsequence of
- another valid sequence of UTF-8 bytes.
-
- */
- char * const s0 = STRING(scan), *s, *t;
- char * const s1 = s0 + STR_LEN(scan) - 1;
- char * const s2 = s1 - 4;
-#ifdef EBCDIC /* RD tunifold greek 0390 and 03B0 */
- const char t0[] = "\xaf\x49\xaf\x42";
-#else
- const char t0[] = "\xcc\x88\xcc\x81";
-#endif
- const char * const t1 = t0 + 3;
-
- for (s = s0 + 2;
- s < s2 && (t = ninstr(s, s1, t0, t1));
- s = t + 4) {
-#ifdef EBCDIC
- if (((U8)t[-1] == 0x68 && (U8)t[-2] == 0xB4) ||
- ((U8)t[-1] == 0x46 && (U8)t[-2] == 0xB5))
-#else
- if (((U8)t[-1] == 0xB9 && (U8)t[-2] == 0xCE) ||
- ((U8)t[-1] == 0x85 && (U8)t[-2] == 0xCF))
-#endif
- *min -= 4;
- }
- }
-
-#ifdef DEBUGGING
- /* Allow dumping */
- n = scan + NODE_SZ_STR(scan);
- while (n <= stop) {
- if (PL_regkind[OP(n)] != NOTHING || OP(n) == NOTHING) {
- OP(n) = OPTIMIZED;
- NEXT_OFF(n) = 0;
- }
- n++;
- }
-#endif
- DEBUG_OPTIMISE_r(if (merged){DEBUG_PEEP("finl",scan,depth)});
- return stopnow;
-}
-
-/* REx optimizer. Converts nodes into quickier variants "in place".
- Finds fixed substrings. */
-
-/* Stops at toplevel WHILEM as well as at "last". At end *scanp is set
- to the position after last scanned or to NULL. */
-
-#define INIT_AND_WITHP \
- assert(!and_withp); \
- Newx(and_withp,1,struct regnode_charclass_class); \
- SAVEFREEPV(and_withp)
-
-/* this is a chain of data about sub patterns we are processing that
- need to be handled seperately/specially in study_chunk. Its so
- we can simulate recursion without losing state. */
-struct scan_frame;
-typedef struct scan_frame {
- regnode *last; /* last node to process in this frame */
- regnode *next; /* next node to process when last is reached */
- struct scan_frame *prev; /*previous frame*/
- I32 stop; /* what stopparen do we use */
-} scan_frame;
-
-
-#define SCAN_COMMIT(s, data, m) scan_commit(s, data, m, is_inf)
-
-#define CASE_SYNST_FNC(nAmE) \
-case nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break; \
-case N ## nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break
-
-
-
-STATIC I32
-S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp,
- I32 *minlenp, I32 *deltap,
- regnode *last,
- scan_data_t *data,
- I32 stopparen,
- U8* recursed,
- struct regnode_charclass_class *and_withp,
- U32 flags, U32 depth)
- /* scanp: Start here (read-write). */
- /* deltap: Write maxlen-minlen here. */
- /* last: Stop before this one. */
- /* data: string data about the pattern */
- /* stopparen: treat close N as END */
- /* recursed: which subroutines have we recursed into */
- /* and_withp: Valid if flags & SCF_DO_STCLASS_OR */
-{
- dVAR;
- I32 min = 0, pars = 0, code;
- regnode *scan = *scanp, *next;
- I32 delta = 0;
- int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF);
- int is_inf_internal = 0; /* The studied chunk is infinite */
- I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0;
- scan_data_t data_fake;
- SV *re_trie_maxbuff = NULL;
- regnode *first_non_open = scan;
- I32 stopmin = I32_MAX;
- scan_frame *frame = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_STUDY_CHUNK;
-
-#ifdef DEBUGGING
- StructCopy(&zero_scan_data, &data_fake, scan_data_t);
-#endif
-
- if ( depth == 0 ) {
- while (first_non_open && OP(first_non_open) == OPEN)
- first_non_open=regnext(first_non_open);
- }
-
-
- fake_study_recurse:
- while ( scan && OP(scan) != END && scan < last ){
- /* Peephole optimizer: */
- DEBUG_STUDYDATA("Peep:", data,depth);
- DEBUG_PEEP("Peep",scan,depth);
- JOIN_EXACT(scan,&min,0);
-
- /* Follow the next-chain of the current node and optimize
- away all the NOTHINGs from it. */
- if (OP(scan) != CURLYX) {
- const int max = (reg_off_by_arg[OP(scan)]
- ? I32_MAX
- /* I32 may be smaller than U16 on CRAYs! */
- : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX));
- int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan));
- int noff;
- regnode *n = scan;
-
- /* Skip NOTHING and LONGJMP. */
- while ((n = regnext(n))
- && ((PL_regkind[OP(n)] == NOTHING && (noff = NEXT_OFF(n)))
- || ((OP(n) == LONGJMP) && (noff = ARG(n))))
- && off + noff < max)
- off += noff;
- if (reg_off_by_arg[OP(scan)])
- ARG(scan) = off;
- else
- NEXT_OFF(scan) = off;
- }
-
-
-
- /* The principal pseudo-switch. Cannot be a switch, since we
- look into several different things. */
- if (OP(scan) == BRANCH || OP(scan) == BRANCHJ
- || OP(scan) == IFTHEN) {
- next = regnext(scan);
- code = OP(scan);
- /* demq: the op(next)==code check is to see if we have "branch-branch" AFAICT */
-
- if (OP(next) == code || code == IFTHEN) {
- /* NOTE - There is similar code to this block below for handling
- TRIE nodes on a re-study. If you change stuff here check there
- too. */
- I32 max1 = 0, min1 = I32_MAX, num = 0;
- struct regnode_charclass_class accum;
- regnode * const startbranch=scan;
-
- if (flags & SCF_DO_SUBSTR)
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- while (OP(scan) == code) {
- I32 deltanext, minnext, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- num++;
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
-
- data_fake.pos_delta = delta;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- if (code != BRANCH)
- scan = NEXTOPER(scan);
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- /* we suppose the run is continuous, last=next...*/
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- next, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- if (min1 > minnext)
- min1 = minnext;
- if (max1 < minnext + deltanext)
- max1 = minnext + deltanext;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
- scan = next;
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > minnext)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- if (code == IFTHEN && num < 2) /* Empty ELSE branch */
- min1 = 0;
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
-
- if (PERL_ENABLE_TRIE_OPTIMISATION && OP( startbranch ) == BRANCH ) {
- /* demq.
-
- Assuming this was/is a branch we are dealing with: 'scan' now
- points at the item that follows the branch sequence, whatever
- it is. We now start at the beginning of the sequence and look
- for subsequences of
-
- BRANCH->EXACT=>x1
- BRANCH->EXACT=>x2
- tail
-
- which would be constructed from a pattern like /A|LIST|OF|WORDS/
-
- If we can find such a subseqence we need to turn the first
- element into a trie and then add the subsequent branch exact
- strings to the trie.
-
- We have two cases
-
- 1. patterns where the whole set of branch can be converted.
-
- 2. patterns where only a subset can be converted.
-
- In case 1 we can replace the whole set with a single regop
- for the trie. In case 2 we need to keep the start and end
- branchs so
-
- 'BRANCH EXACT; BRANCH EXACT; BRANCH X'
- becomes BRANCH TRIE; BRANCH X;
-
- There is an additional case, that being where there is a
- common prefix, which gets split out into an EXACT like node
- preceding the TRIE node.
-
- If x(1..n)==tail then we can do a simple trie, if not we make
- a "jump" trie, such that when we match the appropriate word
- we "jump" to the appopriate tail node. Essentailly we turn
- a nested if into a case structure of sorts.
-
- */
-
- int made=0;
- if (!re_trie_maxbuff) {
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff))
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- if ( SvIV(re_trie_maxbuff)>=0 ) {
- regnode *cur;
- regnode *first = (regnode *)NULL;
- regnode *last = (regnode *)NULL;
- regnode *tail = scan;
- U8 optype = 0;
- U32 count=0;
-
-#ifdef DEBUGGING
- SV * const mysv = sv_newmortal(); /* for dumping */
-#endif
- /* var tail is used because there may be a TAIL
- regop in the way. Ie, the exacts will point to the
- thing following the TAIL, but the last branch will
- point at the TAIL. So we advance tail. If we
- have nested (?:) we may have to move through several
- tails.
- */
-
- while ( OP( tail ) == TAIL ) {
- /* this is the TAIL generated by (?:) */
- tail = regnext( tail );
- }
-
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, tail );
- PerlIO_printf( Perl_debug_log, "%*s%s%s\n",
- (int)depth * 2 + 2, "",
- "Looking for TRIE'able sequences. Tail node is: ",
- SvPV_nolen_const( mysv )
- );
- });
-
- /*
-
- step through the branches, cur represents each
- branch, noper is the first thing to be matched
- as part of that branch and noper_next is the
- regnext() of that node. if noper is an EXACT
- and noper_next is the same as scan (our current
- position in the regex) then the EXACT branch is
- a possible optimization target. Once we have
- two or more consequetive such branches we can
- create a trie of the EXACT's contents and stich
- it in place. If the sequence represents all of
- the branches we eliminate the whole thing and
- replace it with a single TRIE. If it is a
- subsequence then we need to stitch it in. This
- means the first branch has to remain, and needs
- to be repointed at the item on the branch chain
- following the last branch optimized. This could
- be either a BRANCH, in which case the
- subsequence is internal, or it could be the
- item following the branch sequence in which
- case the subsequence is at the end.
-
- */
-
- /* dont use tail as the end marker for this traverse */
- for ( cur = startbranch ; cur != scan ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
-#if defined(DEBUGGING) || defined(NOJUMPTRIE)
- regnode * const noper_next = regnext( noper );
-#endif
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log, "%*s- %s (%d)",
- (int)depth * 2 + 2,"", SvPV_nolen_const( mysv ), REG_NODE_NUM(cur) );
-
- regprop(RExC_rx, mysv, noper);
- PerlIO_printf( Perl_debug_log, " -> %s",
- SvPV_nolen_const(mysv));
-
- if ( noper_next ) {
- regprop(RExC_rx, mysv, noper_next );
- PerlIO_printf( Perl_debug_log,"\t=> %s\t",
- SvPV_nolen_const(mysv));
- }
- PerlIO_printf( Perl_debug_log, "(First==%d,Last==%d,Cur==%d)\n",
- REG_NODE_NUM(first), REG_NODE_NUM(last), REG_NODE_NUM(cur) );
- });
- if ( (((first && optype!=NOTHING) ? OP( noper ) == optype
- : PL_regkind[ OP( noper ) ] == EXACT )
- || OP(noper) == NOTHING )
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- && count < U16_MAX)
- {
- count++;
- if ( !first || optype == NOTHING ) {
- if (!first) first = cur;
- optype = OP( noper );
- } else {
- last = cur;
- }
- } else {
-/*
- Currently we assume that the trie can handle unicode and ascii
- matches fold cased matches. If this proves true then the following
- define will prevent tries in this situation.
-
- #define TRIE_TYPE_IS_SAFE (UTF || optype==EXACT)
-*/
-#define TRIE_TYPE_IS_SAFE 1
- if ( last && TRIE_TYPE_IS_SAFE ) {
- make_trie( pRExC_state,
- startbranch, first, cur, tail, count,
- optype, depth+1 );
- }
- if ( PL_regkind[ OP( noper ) ] == EXACT
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- ){
- count = 1;
- first = cur;
- optype = OP( noper );
- } else {
- count = 0;
- first = NULL;
- optype = 0;
- }
- last = NULL;
- }
- }
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log,
- "%*s- %s (%d) <SCAN FINISHED>\n", (int)depth * 2 + 2,
- "", SvPV_nolen_const( mysv ),REG_NODE_NUM(cur));
-
- });
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- made= make_trie( pRExC_state, startbranch, first, scan, tail, count, optype, depth+1 );
-#ifdef TRIE_STUDY_OPT
- if ( ((made == MADE_EXACT_TRIE &&
- startbranch == first)
- || ( first_non_open == first )) &&
- depth==0 ) {
- flags |= SCF_TRIE_RESTUDY;
- if ( startbranch == first
- && scan == tail )
- {
- RExC_seen &=~REG_TOP_LEVEL_BRANCHES;
- }
- }
-#endif
- }
- }
-
- } /* do trie */
-
- }
- else if ( code == BRANCHJ ) { /* single branch is optimized. */
- scan = NEXTOPER(NEXTOPER(scan));
- } else /* single branch is optimized. */
- scan = NEXTOPER(scan);
- continue;
- } else if (OP(scan) == SUSPEND || OP(scan) == GOSUB || OP(scan) == GOSTART) {
- scan_frame *newframe = NULL;
- I32 paren;
- regnode *start;
- regnode *end;
-
- if (OP(scan) != SUSPEND) {
- /* set the pointer */
- if (OP(scan) == GOSUB) {
- paren = ARG(scan);
- RExC_recurse[ARG2L(scan)] = scan;
- start = RExC_open_parens[paren-1];
- end = RExC_close_parens[paren-1];
- } else {
- paren = 0;
- start = RExC_rxi->program + 1;
- end = RExC_opend;
- }
- if (!recursed) {
- Newxz(recursed, (((RExC_npar)>>3) +1), U8);
- SAVEFREEPV(recursed);
- }
- if (!PAREN_TEST(recursed,paren+1)) {
- PAREN_SET(recursed,paren+1);
- Newx(newframe,1,scan_frame);
- } else {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- } else {
- Newx(newframe,1,scan_frame);
- paren = stopparen;
- start = scan+2;
- end = regnext(scan);
- }
- if (newframe) {
- assert(start);
- assert(end);
- SAVEFREEPV(newframe);
- newframe->next = regnext(scan);
- newframe->last = last;
- newframe->stop = stopparen;
- newframe->prev = frame;
-
- frame = newframe;
- scan = start;
- stopparen = paren;
- last = end;
-
- continue;
- }
- }
- else if (OP(scan) == EXACT) {
- I32 l = STR_LEN(scan);
- UV uc;
- if (UTF) {
- const U8 * const s = (U8*)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- } else {
- uc = *((U8*)STRING(scan));
- }
- min += l;
- if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */
- /* The code below prefers earlier match for fixed
- offset, later match for variable offset. */
- if (data->last_end == -1) { /* Update the start info. */
- data->last_start_min = data->pos_min;
- data->last_start_max = is_inf
- ? I32_MAX : data->pos_min + data->pos_delta;
- }
- sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan));
- if (UTF)
- SvUTF8_on(data->last_found);
- {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += utf8_length((U8*)STRING(scan),
- (U8*)STRING(scan)+STR_LEN(scan));
- }
- data->last_end = data->pos_min + l;
- data->pos_min += l; /* As in the first entry. */
- data->flags &= ~SF_BEFORE_EOL;
- }
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && (!(data->start_class->flags & ANYOF_FOLD)
- || !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- )
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- if (uc < 0x100)
- data->start_class->flags &= ~ANYOF_UNICODE_ALL;
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- /* false positive possible if the class is case-folded */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- else
- data->start_class->flags |= ANYOF_UNICODE_ALL;
- data->start_class->flags &= ~ANYOF_EOS;
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (PL_regkind[OP(scan)] == EXACT) { /* But OP != EXACT! */
- I32 l = STR_LEN(scan);
- UV uc = *((U8*)STRING(scan));
-
- /* Search for fixed substrings supports EXACT only. */
- if (flags & SCF_DO_SUBSTR) {
- assert(data);
- SCAN_COMMIT(pRExC_state, data, minlenp);
- }
- if (UTF) {
- const U8 * const s = (U8 *)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- }
- min += l;
- if (flags & SCF_DO_SUBSTR)
- data->pos_min += l;
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat) {
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- data->start_class->flags |= ANYOF_FOLD;
- if (OP(scan) == EXACTFL)
- data->start_class->flags |= ANYOF_LOCALE;
- }
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- if (data->start_class->flags & ANYOF_FOLD) {
- /* false positive possible if the class is case-folded.
- Assume that the locale settings are the same... */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- }
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (strchr((const char*)PL_varies,OP(scan))) {
- I32 mincount, maxcount, minnext, deltanext, fl = 0;
- I32 f = flags, pos_before = 0;
- regnode * const oscan = scan;
- struct regnode_charclass_class this_class;
- struct regnode_charclass_class *oclass = NULL;
- I32 next_is_eval = 0;
-
- switch (PL_regkind[OP(scan)]) {
- case WHILEM: /* End of (?:...)* . */
- scan = NEXTOPER(scan);
- goto finish;
- case PLUS:
- if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) {
- next = NEXTOPER(scan);
- if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) {
- mincount = 1;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- }
- if (flags & SCF_DO_SUBSTR)
- data->pos_min++;
- min++;
- /* Fall through. */
- case STAR:
- if (flags & SCF_DO_STCLASS) {
- mincount = 0;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- is_inf = is_inf_internal = 1;
- scan = regnext(scan);
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot extend fixed substrings */
- data->longest = &(data->longest_float);
- }
- goto optimize_curly_tail;
- case CURLY:
- if (stopparen>0 && (OP(scan)==CURLYN || OP(scan)==CURLYM)
- && (scan->flags == stopparen))
- {
- mincount = 1;
- maxcount = 1;
- } else {
- mincount = ARG1(scan);
- maxcount = ARG2(scan);
- }
- next = regnext(scan);
- if (OP(scan) == CURLYX) {
- I32 lp = (data ? *(data->last_closep) : 0);
- scan->flags = ((lp <= (I32)U8_MAX) ? (U8)lp : U8_MAX);
- }
- scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- next_is_eval = (OP(scan) == EVAL);
- do_curly:
- if (flags & SCF_DO_SUBSTR) {
- if (mincount == 0) SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot extend fixed substrings */
- pos_before = data->pos_min;
- }
- if (data) {
- fl = data->flags;
- data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL);
- if (is_inf)
- data->flags |= SF_IS_INF;
- }
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- oclass = data->start_class;
- data->start_class = &this_class;
- f |= SCF_DO_STCLASS_AND;
- f &= ~SCF_DO_STCLASS_OR;
- }
- /* These are the cases when once a subexpression
- fails at a particular position, it cannot succeed
- even after backtracking at the enclosing scope.
-
- XXXX what if minimal match and we are at the
- initial run of {n,m}? */
- if ((mincount != maxcount - 1) && (maxcount != REG_INFTY))
- f &= ~SCF_WHILEM_VISITED_POS;
-
- /* This will finish on WHILEM, setting scan, or on NULL: */
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- last, data, stopparen, recursed, NULL,
- (mincount == 0
- ? (f & ~SCF_DO_SUBSTR) : f),depth+1);
-
- if (flags & SCF_DO_STCLASS)
- data->start_class = oclass;
- if (mincount == 0 || minnext == 0) {
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&this_class, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- } else { /* Non-zero len */
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- cl_and(data->start_class, and_withp);
- }
- else if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class, &this_class);
- flags &= ~SCF_DO_STCLASS;
- }
- if (!scan) /* It was not CURLYX, but CURLY. */
- scan = next;
- if ( /* ? quantifier ok, except for (?{ ... }) */
- (next_is_eval || !(mincount == 0 && maxcount == 1))
- && (minnext == 0) && (deltanext == 0)
- && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR))
- && maxcount <= REG_INFTY/3) /* Complement check for big count */
- {
- ckWARNreg(RExC_parse,
- "Quantifier unexpected on zero-length expression");
- }
-
- min += minnext * mincount;
- is_inf_internal |= ((maxcount == REG_INFTY
- && (minnext + deltanext) > 0)
- || deltanext == I32_MAX);
- is_inf |= is_inf_internal;
- delta += (minnext + deltanext) * maxcount - minnext * mincount;
-
- /* Try powerful optimization CURLYX => CURLYN. */
- if ( OP(oscan) == CURLYX && data
- && data->flags & SF_IN_PAR
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext && minnext == 1 ) {
- /* Try to optimize to CURLYN. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS;
- regnode * const nxt1 = nxt;
-#ifdef DEBUGGING
- regnode *nxt2;
-#endif
-
- /* Skip open. */
- nxt = regnext(nxt);
- if (!strchr((const char*)PL_simple,OP(nxt))
- && !(PL_regkind[OP(nxt)] == EXACT
- && STR_LEN(nxt) == 1))
- goto nogo;
-#ifdef DEBUGGING
- nxt2 = nxt;
-#endif
- nxt = regnext(nxt);
- if (OP(nxt) != CLOSE)
- goto nogo;
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt+2; /*close->while*/
- }
- /* Now we know that nxt2 is the only contents: */
- oscan->flags = (U8)ARG(nxt);
- OP(oscan) = CURLYN;
- OP(nxt1) = NOTHING; /* was OPEN. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */
-#endif
- }
- nogo:
-
- /* Try optimization CURLYX => CURLYM. */
- if ( OP(oscan) == CURLYX && data
- && !(data->flags & SF_HAS_PAR)
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext /* atom is fixed width */
- && minnext != 0 /* CURLYM can't handle zero width */
- ) {
- /* XXXX How to optimize if data == 0? */
- /* Optimize to a simpler form. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */
- regnode *nxt2;
-
- OP(oscan) = CURLYM;
- while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/
- && (OP(nxt2) != WHILEM))
- nxt = nxt2;
- OP(nxt2) = SUCCEED; /* Whas WHILEM */
- /* Need to optimize away parenths. */
- if (data->flags & SF_IN_PAR) {
- /* Set the parenth number. */
- regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/
-
- if (OP(nxt) != CLOSE)
- FAIL("Panic opt close");
- oscan->flags = (U8)ARG(nxt);
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt2+1; /*close->NOTHING*/
- }
- OP(nxt1) = OPTIMIZED; /* was OPEN. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */
-#endif
-#if 0
- while ( nxt1 && (OP(nxt1) != WHILEM)) {
- regnode *nnxt = regnext(nxt1);
-
- if (nnxt == nxt) {
- if (reg_off_by_arg[OP(nxt1)])
- ARG_SET(nxt1, nxt2 - nxt1);
- else if (nxt2 - nxt1 < U16_MAX)
- NEXT_OFF(nxt1) = nxt2 - nxt1;
- else
- OP(nxt) = NOTHING; /* Cannot beautify */
- }
- nxt1 = nnxt;
- }
-#endif
- /* Optimize again: */
- study_chunk(pRExC_state, &nxt1, minlenp, &deltanext, nxt,
- NULL, stopparen, recursed, NULL, 0,depth+1);
- }
- else
- oscan->flags = 0;
- }
- else if ((OP(oscan) == CURLYX)
- && (flags & SCF_WHILEM_VISITED_POS)
- /* See the comment on a similar expression above.
- However, this time it not a subexpression
- we care about, but the expression itself. */
- && (maxcount == REG_INFTY)
- && data && ++data->whilem_c < 16) {
- /* This stays as CURLYX, we can put the count/of pair. */
- /* Find WHILEM (as in regexec.c) */
- regnode *nxt = oscan + NEXT_OFF(oscan);
-
- if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */
- nxt += ARG(nxt);
- PREVOPER(nxt)->flags = (U8)(data->whilem_c
- | (RExC_whilem_seen << 4)); /* On WHILEM */
- }
- if (data && fl & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (flags & SCF_DO_SUBSTR) {
- SV *last_str = NULL;
- int counted = mincount != 0;
-
- if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */
-#if defined(SPARC64_GCC_WORKAROUND)
- I32 b = 0;
- STRLEN l = 0;
- const char *s = NULL;
- I32 old = 0;
-
- if (pos_before >= data->last_start_min)
- b = pos_before;
- else
- b = data->last_start_min;
-
- l = 0;
- s = SvPV_const(data->last_found, l);
- old = b - data->last_start_min;
-
-#else
- I32 b = pos_before >= data->last_start_min
- ? pos_before : data->last_start_min;
- STRLEN l;
- const char * const s = SvPV_const(data->last_found, l);
- I32 old = b - data->last_start_min;
-#endif
-
- if (UTF)
- old = utf8_hop((U8*)s, old) - (U8*)s;
-
- l -= old;
- /* Get the added string: */
- last_str = newSVpvn_utf8(s + old, l, UTF);
- if (deltanext == 0 && pos_before == b) {
- /* What was added is a constant string */
- if (mincount > 1) {
- SvGROW(last_str, (mincount * l) + 1);
- repeatcpy(SvPVX(last_str) + l,
- SvPVX_const(last_str), l, mincount - 1);
- SvCUR_set(last_str, SvCUR(last_str) * mincount);
- /* Add additional parts. */
- SvCUR_set(data->last_found,
- SvCUR(data->last_found) - l);
- sv_catsv(data->last_found, last_str);
- {
- SV * sv = data->last_found;
- MAGIC *mg =
- SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += CHR_SVLEN(last_str) - l;
- }
- data->last_end += l * (mincount - 1);
- }
- } else {
- /* start offset must point into the last copy */
- data->last_start_min += minnext * (mincount - 1);
- data->last_start_max += is_inf ? I32_MAX
- : (maxcount - 1) * (minnext + data->pos_delta);
- }
- }
- /* It is counted once already... */
- data->pos_min += minnext * (mincount - counted);
- data->pos_delta += - counted * deltanext +
- (minnext + deltanext) * maxcount - minnext * mincount;
- if (mincount != maxcount) {
- /* Cannot extend fixed substrings found inside
- the group. */
- SCAN_COMMIT(pRExC_state,data,minlenp);
- if (mincount && last_str) {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
-
- if (mg)
- mg->mg_len = -1;
- sv_setsv(sv, last_str);
- data->last_end = data->pos_min;
- data->last_start_min =
- data->pos_min - CHR_SVLEN(last_str);
- data->last_start_max = is_inf
- ? I32_MAX
- : data->pos_min + data->pos_delta
- - CHR_SVLEN(last_str);
- }
- data->longest = &(data->longest_float);
- }
- SvREFCNT_dec(last_str);
- }
- if (data && (fl & SF_HAS_EVAL))
- data->flags |= SF_HAS_EVAL;
- optimize_curly_tail:
- if (OP(oscan) != CURLYX) {
- while (PL_regkind[OP(next = regnext(oscan))] == NOTHING
- && NEXT_OFF(next))
- NEXT_OFF(oscan) += NEXT_OFF(next);
- }
- continue;
- default: /* REF and CLUMP only? */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR)
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- break;
- }
- }
- else if (OP(scan) == LNBREAK) {
- if (flags & SCF_DO_STCLASS) {
- int value = 0;
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
- if (flags & SCF_DO_STCLASS_AND) {
- for (value = 0; value < 256; value++)
- if (!is_VERTWS_cp(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- for (value = 0; value < 256; value++)
- if (is_VERTWS_cp(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- min += 1;
- delta += 1;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += 1;
- data->longest = &(data->longest_float);
- }
-
- }
- else if (OP(scan) == FOLDCHAR) {
- int d = ARG(scan)==0xDF ? 1 : 2;
- flags &= ~SCF_DO_STCLASS;
- min += 1;
- delta += d;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += d;
- data->longest = &(data->longest_float);
- }
- }
- else if (strchr((const char*)PL_simple,OP(scan))) {
- int value = 0;
-
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->pos_min++;
- }
- min++;
- if (flags & SCF_DO_STCLASS) {
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
-
- /* Some of the logic below assumes that switching
- locale on will only add false positives. */
- switch (PL_regkind[OP(scan)]) {
- case SANY:
- default:
- do_default:
- /* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- break;
- case REG_ANY:
- if (OP(scan) == SANY)
- goto do_default;
- if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */
- value = (ANYOF_BITMAP_TEST(data->start_class,'\n')
- || (data->start_class->flags & ANYOF_CLASS));
- cl_anything(pRExC_state, data->start_class);
- }
- if (flags & SCF_DO_STCLASS_AND || !value)
- ANYOF_BITMAP_CLEAR(data->start_class,'\n');
- break;
- case ANYOF:
- if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class,
- (struct regnode_charclass_class*)scan);
- else
- cl_or(pRExC_state, data->start_class,
- (struct regnode_charclass_class*)scan);
- break;
- case ALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case ALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- }
- else {
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- data->start_class->flags |= ANYOF_LOCALE;
- }
- break;
- case NALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- }
- break;
- case SPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- else {
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case SPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- }
- break;
- case NSPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- else {
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NSPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- }
- break;
- case DIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT);
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NDIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT);
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- CASE_SYNST_FNC(VERTWS);
- CASE_SYNST_FNC(HORIZWS);
-
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (PL_regkind[OP(scan)] == EOL && flags & SCF_DO_SUBSTR) {
- data->flags |= (OP(scan) == MEOL
- ? SF_BEFORE_MEOL
- : SF_BEFORE_SEOL);
- }
- else if ( PL_regkind[OP(scan)] == BRANCHJ
- /* Lookbehind, or need to calculate parens/evals/stclass: */
- && (scan->flags || data || (flags & SCF_DO_STCLASS))
- && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) {
- if ( !PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- || OP(scan) == UNLESSM )
- {
- /* Negative Lookahead/lookbehind
- In this case we can't do fixed string optimisation.
- */
-
- I32 deltanext, minnext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
- minnext = study_chunk(pRExC_state, &nscan, minlenp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f, depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (minnext > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)minnext;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (f & SCF_DO_STCLASS_AND) {
- if (flags & SCF_DO_STCLASS_OR) {
- /* OR before, AND after: ideally we would recurse with
- * data_fake to get the AND applied by study of the
- * remainder of the pattern, and then derecurse;
- * *** HACK *** for now just treat as "no information".
- * See [perl #56690].
- */
- cl_init(pRExC_state, data->start_class);
- } else {
- /* AND before and after: combine and continue */
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- }
-#if PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- else {
- /* Positive Lookahead/lookbehind
- In this case we can do fixed string optimisation,
- but we must be careful about it. Note in the case of
- lookbehind the positions will be offset by the minimum
- length of the pattern, something we won't know about
- until after the recurse.
- */
- I32 deltanext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
- /* We use SAVEFREEPV so that when the full compile
- is finished perl will clean up the allocated
- minlens when its all done. This was we don't
- have to worry about freeing them when we know
- they wont be used, which would be a pain.
- */
- I32 *minnextp;
- Newx( minnextp, 1, I32 );
- SAVEFREEPV(minnextp);
-
- if (data) {
- StructCopy(data, &data_fake, scan_data_t);
- if ((flags & SCF_DO_SUBSTR) && data->last_found) {
- f |= SCF_DO_SUBSTR;
- if (scan->flags)
- SCAN_COMMIT(pRExC_state, &data_fake,minlenp);
- data_fake.last_found=newSVsv(data->last_found);
- }
- }
- else
- data_fake.last_closep = &fake;
- data_fake.flags = 0;
- data_fake.pos_delta = delta;
- if (is_inf)
- data_fake.flags |= SF_IS_INF;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
-
- *minnextp = study_chunk(pRExC_state, &nscan, minnextp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f,depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (*minnextp > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)*minnextp;
- }
-
- *minnextp += min;
-
- if (f & SCF_DO_STCLASS_AND) {
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- if ((flags & SCF_DO_SUBSTR) && data_fake.last_found) {
- if (RExC_rx->minlen<*minnextp)
- RExC_rx->minlen=*minnextp;
- SCAN_COMMIT(pRExC_state, &data_fake, minnextp);
- SvREFCNT_dec(data_fake.last_found);
-
- if ( data_fake.minlen_fixed != minlenp )
- {
- data->offset_fixed= data_fake.offset_fixed;
- data->minlen_fixed= data_fake.minlen_fixed;
- data->lookbehind_fixed+= scan->flags;
- }
- if ( data_fake.minlen_float != minlenp )
- {
- data->minlen_float= data_fake.minlen_float;
- data->offset_float_min=data_fake.offset_float_min;
- data->offset_float_max=data_fake.offset_float_max;
- data->lookbehind_float+= scan->flags;
- }
- }
- }
-
-
- }
-#endif
- }
- else if (OP(scan) == OPEN) {
- if (stopparen != (I32)ARG(scan))
- pars++;
- }
- else if (OP(scan) == CLOSE) {
- if (stopparen == (I32)ARG(scan)) {
- break;
- }
- if ((I32)ARG(scan) == is_par) {
- next = regnext(scan);
-
- if ( next && (OP(next) != WHILEM) && next < last)
- is_par = 0; /* Disable optimization */
- }
- if (data)
- *(data->last_closep) = ARG(scan);
- }
- else if (OP(scan) == EVAL) {
- if (data)
- data->flags |= SF_HAS_EVAL;
- }
- else if ( PL_regkind[OP(scan)] == ENDLIKE ) {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- flags &= ~SCF_DO_SUBSTR;
- }
- if (data && OP(scan)==ACCEPT) {
- data->flags |= SCF_SEEN_ACCEPT;
- if (stopmin > min)
- stopmin = min;
- }
- }
- else if (OP(scan) == LOGICAL && scan->flags == 2) /* Embedded follows */
- {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- else if (OP(scan) == GPOS) {
- if (!(RExC_rx->extflags & RXf_GPOS_FLOAT) &&
- !(delta || is_inf || (data && data->pos_delta)))
- {
- if (!(RExC_rx->extflags & RXf_ANCH) && (flags & SCF_DO_SUBSTR))
- RExC_rx->extflags |= RXf_ANCH_GPOS;
- if (RExC_rx->gofs < (U32)min)
- RExC_rx->gofs = min;
- } else {
- RExC_rx->extflags |= RXf_GPOS_FLOAT;
- RExC_rx->gofs = 0;
- }
- }
-#ifdef TRIE_STUDY_OPT
-#ifdef FULL_TRIE_STUDY
- else if (PL_regkind[OP(scan)] == TRIE) {
- /* NOTE - There is similar code to this block above for handling
- BRANCH nodes on the initial study. If you change stuff here
- check there too. */
- regnode *trie_node= scan;
- regnode *tail= regnext(scan);
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- I32 max1 = 0, min1 = I32_MAX;
- struct regnode_charclass_class accum;
-
- if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */
- SCAN_COMMIT(pRExC_state, data,minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- if (!trie->jump) {
- min1= trie->minlen;
- max1= trie->maxlen;
- } else {
- const regnode *nextbranch= NULL;
- U32 word;
-
- for ( word=1 ; word <= trie->wordcount ; word++)
- {
- I32 deltanext=0, minnext=0, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- if (trie->jump[word]) {
- if (!nextbranch)
- nextbranch = trie_node + trie->jump[0];
- scan= trie_node + trie->jump[word];
- /* We go from the jump point to the branch that follows
- it. Note this means we need the vestigal unused branches
- even though they arent otherwise used.
- */
- minnext = study_chunk(pRExC_state, &scan, minlenp,
- &deltanext, (regnode *)nextbranch, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode*)nextbranch);
-
- if (min1 > (I32)(minnext + trie->minlen))
- min1 = minnext + trie->minlen;
- if (max1 < (I32)(minnext + deltanext + trie->maxlen))
- max1 = minnext + deltanext + trie->maxlen;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
-
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > min + min1)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- }
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- scan= tail;
- continue;
- }
-#else
- else if (PL_regkind[OP(scan)] == TRIE) {
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- U8*bang=NULL;
-
- min += trie->minlen;
- delta += (trie->maxlen - trie->minlen);
- flags &= ~SCF_DO_STCLASS; /* xxx */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += trie->minlen;
- data->pos_delta += (trie->maxlen - trie->minlen);
- if (trie->maxlen != trie->minlen)
- data->longest = &(data->longest_float);
- }
- if (trie->jump) /* no more substrings -- for now /grr*/
- flags &= ~SCF_DO_SUBSTR;
- }
-#endif /* old or new */
-#endif /* TRIE_STUDY_OPT */
-
- /* Else: zero-length, ignore. */
- scan = regnext(scan);
- }
- if (frame) {
- last = frame->last;
- scan = frame->next;
- stopparen = frame->stop;
- frame = frame->prev;
- goto fake_study_recurse;
- }
-
- finish:
- assert(!frame);
- DEBUG_STUDYDATA("pre-fin:",data,depth);
-
- *scanp = scan;
- *deltap = is_inf_internal ? I32_MAX : delta;
- if (flags & SCF_DO_SUBSTR && is_inf)
- data->pos_delta = I32_MAX - data->pos_min;
- if (is_par > (I32)U8_MAX)
- is_par = 0;
- if (is_par && pars==1 && data) {
- data->flags |= SF_IN_PAR;
- data->flags &= ~SF_HAS_PAR;
- }
- else if (pars && data) {
- data->flags |= SF_HAS_PAR;
- data->flags &= ~SF_IN_PAR;
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- if (flags & SCF_TRIE_RESTUDY)
- data->flags |= SCF_TRIE_RESTUDY;
-
- DEBUG_STUDYDATA("post-fin:",data,depth);
-
- return min < stopmin ? min : stopmin;
-}
-
-STATIC U32
-S_add_data(RExC_state_t *pRExC_state, U32 n, const char *s)
-{
- U32 count = RExC_rxi->data ? RExC_rxi->data->count : 0;
-
- PERL_ARGS_ASSERT_ADD_DATA;
-
- Renewc(RExC_rxi->data,
- sizeof(*RExC_rxi->data) + sizeof(void*) * (count + n - 1),
- char, struct reg_data);
- if(count)
- Renew(RExC_rxi->data->what, count + n, U8);
- else
- Newx(RExC_rxi->data->what, n, U8);
- RExC_rxi->data->count = count + n;
- Copy(s, RExC_rxi->data->what + count, n, U8);
- return count;
-}
-
-/*XXX: todo make this not included in a non debugging perl */
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_reginitcolors(pTHX)
-{
- dVAR;
- const char * const s = PerlEnv_getenv("PERL_RE_COLORS");
- if (s) {
- char *t = savepv(s);
- int i = 0;
- PL_colors[0] = t;
- while (++i < 6) {
- t = strchr(t, '\t');
- if (t) {
- *t = '\0';
- PL_colors[i] = ++t;
- }
- else
- PL_colors[i] = t = (char *)"";
- }
- } else {
- int i = 0;
- while (i < 6)
- PL_colors[i++] = (char *)"";
- }
- PL_colorset = 1;
-}
-#endif
-
-
-#ifdef TRIE_STUDY_OPT
-#define CHECK_RESTUDY_GOTO \
- if ( \
- (data.flags & SCF_TRIE_RESTUDY) \
- && ! restudied++ \
- ) goto reStudy
-#else
-#define CHECK_RESTUDY_GOTO
-#endif
-
-/*
- - pregcomp - compile a regular expression into internal code
- *
- * We can't allocate space until we know how big the compiled form will be,
- * but we can't compile it (and thus know how big it is) until we've got a
- * place to put the code. So we cheat: we compile it twice, once with code
- * generation turned off and size counting turned on, and once "for real".
- * This also means that we don't allocate space until we are sure that the
- * thing really will compile successfully, and we never have to move the
- * code and thus invalidate pointers into it. (Note that it has to be in
- * one piece because free() must be able to free it all.) [NB: not true in perl]
- *
- * Beware that the optimization-preparation code in here knows about some
- * of the structure of the compiled regexp. [I'll say.]
- */
-
-
-
-#ifndef PERL_IN_XSUB_RE
-#define RE_ENGINE_PTR &PL_core_reg_engine
-#else
-extern const struct regexp_engine my_reg_engine;
-#define RE_ENGINE_PTR &my_reg_engine
-#endif
-
-#ifndef PERL_IN_XSUB_RE
-REGEXP *
-Perl_pregcomp(pTHX_ SV * const pattern, const U32 flags)
-{
- dVAR;
- HV * const table = GvHV(PL_hintgv);
-
- PERL_ARGS_ASSERT_PREGCOMP;
-
- /* Dispatch a request to compile a regexp to correct
- regexp engine. */
- if (table) {
- SV **ptr= hv_fetchs(table, "regcomp", FALSE);
- GET_RE_DEBUG_FLAGS_DECL;
- if (ptr && SvIOK(*ptr) && SvIV(*ptr)) {
- const regexp_engine *eng=INT2PTR(regexp_engine*,SvIV(*ptr));
- DEBUG_COMPILE_r({
- PerlIO_printf(Perl_debug_log, "Using engine %"UVxf"\n",
- SvIV(*ptr));
- });
- return CALLREGCOMP_ENG(eng, pattern, flags);
- }
- }
- return Perl_re_compile(aTHX_ pattern, flags);
-}
-#endif
-
-REGEXP *
-Perl_re_compile(pTHX_ SV * const pattern, U32 pm_flags)
-{
- dVAR;
- REGEXP *rx;
- struct regexp *r;
- register regexp_internal *ri;
- STRLEN plen;
- char *exp = SvPV(pattern, plen);
- char* xend = exp + plen;
- regnode *scan;
- I32 flags;
- I32 minlen = 0;
- I32 sawplus = 0;
- I32 sawopen = 0;
- scan_data_t data;
- RExC_state_t RExC_state;
- RExC_state_t * const pRExC_state = &RExC_state;
-#ifdef TRIE_STUDY_OPT
- int restudied= 0;
- RExC_state_t copyRExC_state;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_COMPILE;
-
- DEBUG_r(if (!PL_colorset) reginitcolors());
-
- RExC_utf8 = RExC_orig_utf8 = SvUTF8(pattern);
-
- DEBUG_COMPILE_r({
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RExC_utf8,
- dsv, exp, plen, 60);
- PerlIO_printf(Perl_debug_log, "%sCompiling REx%s %s\n",
- PL_colors[4],PL_colors[5],s);
- });
-
-redo_first_pass:
- RExC_precomp = exp;
- RExC_flags = pm_flags;
- RExC_sawback = 0;
-
- RExC_seen = 0;
- RExC_seen_zerolen = *exp == '^' ? -1 : 0;
- RExC_seen_evals = 0;
- RExC_extralen = 0;
-
- /* First pass: determine size, legality. */
- RExC_parse = exp;
- RExC_start = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_nestroot = 0;
- RExC_size = 0L;
- RExC_emit = &PL_regdummy;
- RExC_whilem_seen = 0;
- RExC_charnames = NULL;
- RExC_open_parens = NULL;
- RExC_close_parens = NULL;
- RExC_opend = NULL;
- RExC_paren_names = NULL;
-#ifdef DEBUGGING
- RExC_paren_name_list = NULL;
-#endif
- RExC_recurse = NULL;
- RExC_recurse_count = 0;
-
-#if 0 /* REGC() is (currently) a NOP at the first pass.
- * Clever compilers notice this and complain. --jhi */
- REGC((U8)REG_MAGIC, (char*)RExC_emit);
-#endif
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n"));
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- RExC_precomp = NULL;
- return(NULL);
- }
- if (RExC_utf8 && !RExC_orig_utf8) {
- /* It's possible to write a regexp in ascii that represents Unicode
- codepoints outside of the byte range, such as via \x{100}. If we
- detect such a sequence we have to convert the entire pattern to utf8
- and then recompile, as our sizing calculation will have been based
- on 1 byte == 1 character, but we will need to use utf8 to encode
- at least some part of the pattern, and therefore must convert the whole
- thing.
- XXX: somehow figure out how to make this less expensive...
- -- dmq */
- STRLEN len = plen;
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log,
- "UTF8 mismatch! Converting to utf8 for resizing and compile\n"));
- exp = (char*)Perl_bytes_to_utf8(aTHX_ (U8*)exp, &len);
- xend = exp + len;
- RExC_orig_utf8 = RExC_utf8;
- SAVEFREEPV(exp);
- goto redo_first_pass;
- }
- DEBUG_PARSE_r({
- PerlIO_printf(Perl_debug_log,
- "Required size %"IVdf" nodes\n"
- "Starting second pass (creation)\n",
- (IV)RExC_size);
- RExC_lastnum=0;
- RExC_lastparse=NULL;
- });
- /* Small enough for pointer-storage convention?
- If extralen==0, this means that we will not need long jumps. */
- if (RExC_size >= 0x10000L && RExC_extralen)
- RExC_size += RExC_extralen;
- else
- RExC_extralen = 0;
- if (RExC_whilem_seen > 15)
- RExC_whilem_seen = 15;
-
- /* Allocate space and zero-initialize. Note, the two step process
- of zeroing when in debug mode, thus anything assigned has to
- happen after that */
- rx = (REGEXP*) newSV_type(SVt_REGEXP);
- r = (struct regexp*)SvANY(rx);
- Newxc(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode),
- char, regexp_internal);
- if ( r == NULL || ri == NULL )
- FAIL("Regexp out of space");
-#ifdef DEBUGGING
- /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */
- Zero(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode), char);
-#else
- /* bulk initialize base fields with 0. */
- Zero(ri, sizeof(regexp_internal), char);
-#endif
-
- /* non-zero initialization begins here */
- RXi_SET( r, ri );
- r->engine= RE_ENGINE_PTR;
- r->extflags = pm_flags;
- {
- bool has_p = ((r->extflags & RXf_PMf_KEEPCOPY) == RXf_PMf_KEEPCOPY);
- bool has_minus = ((r->extflags & RXf_PMf_STD_PMMOD) != RXf_PMf_STD_PMMOD);
- bool has_runon = ((RExC_seen & REG_SEEN_RUN_ON_COMMENT)==REG_SEEN_RUN_ON_COMMENT);
- U16 reganch = (U16)((r->extflags & RXf_PMf_STD_PMMOD)
- >> RXf_PMf_STD_PMMOD_SHIFT);
- const char *fptr = STD_PAT_MODS; /*"msix"*/
- char *p;
- const STRLEN wraplen = plen + has_minus + has_p + has_runon
- + (sizeof(STD_PAT_MODS) - 1)
- + (sizeof("(?:)") - 1);
-
- p = sv_grow(MUTABLE_SV(rx), wraplen + 1);
- SvCUR_set(rx, wraplen);
- SvPOK_on(rx);
- SvFLAGS(rx) |= SvUTF8(pattern);
- *p++='('; *p++='?';
- if (has_p)
- *p++ = KEEPCOPY_PAT_MOD; /*'p'*/
- {
- char *r = p + (sizeof(STD_PAT_MODS) - 1) + has_minus - 1;
- char *colon = r + 1;
- char ch;
-
- while((ch = *fptr++)) {
- if(reganch & 1)
- *p++ = ch;
- else
- *r-- = ch;
- reganch >>= 1;
- }
- if(has_minus) {
- *r = '-';
- p = colon;
- }
- }
-
- *p++ = ':';
- Copy(RExC_precomp, p, plen, char);
- assert ((RX_WRAPPED(rx) - p) < 16);
- r->pre_prefix = p - RX_WRAPPED(rx);
- p += plen;
- if (has_runon)
- *p++ = '\n';
- *p++ = ')';
- *p = 0;
- }
-
- r->intflags = 0;
- r->nparens = RExC_npar - 1; /* set early to validate backrefs */
-
- if (RExC_seen & REG_SEEN_RECURSE) {
- Newxz(RExC_open_parens, RExC_npar,regnode *);
- SAVEFREEPV(RExC_open_parens);
- Newxz(RExC_close_parens,RExC_npar,regnode *);
- SAVEFREEPV(RExC_close_parens);
- }
-
- /* Useful during FAIL. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- Newxz(ri->u.offsets, 2*RExC_size+1, U32); /* MJD 20001228 */
- DEBUG_OFFSETS_r(PerlIO_printf(Perl_debug_log,
- "%s %"UVuf" bytes for offset annotations.\n",
- ri->u.offsets ? "Got" : "Couldn't get",
- (UV)((2*RExC_size+1) * sizeof(U32))));
-#endif
- SetProgLen(ri,RExC_size);
- RExC_rx_sv = rx;
- RExC_rx = r;
- RExC_rxi = ri;
-
- /* Second pass: emit code. */
- RExC_flags = pm_flags; /* don't let top level (?i) bleed */
- RExC_parse = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_emit_start = ri->program;
- RExC_emit = ri->program;
- RExC_emit_bound = ri->program + RExC_size + 1;
-
- /* Store the count of eval-groups for security checks: */
- RExC_rx->seen_evals = RExC_seen_evals;
- REGC((U8)REG_MAGIC, (char*) RExC_emit++);
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- ReREFCNT_dec(rx);
- return(NULL);
- }
- /* XXXX To minimize changes to RE engine we always allocate
- 3-units-long substrs field. */
- Newx(r->substrs, 1, struct reg_substr_data);
- if (RExC_recurse_count) {
- Newxz(RExC_recurse,RExC_recurse_count,regnode *);
- SAVEFREEPV(RExC_recurse);
- }
-
-reStudy:
- r->minlen = minlen = sawplus = sawopen = 0;
- Zero(r->substrs, 1, struct reg_substr_data);
-
-#ifdef TRIE_STUDY_OPT
- if (!restudied) {
- StructCopy(&zero_scan_data, &data, scan_data_t);
- copyRExC_state = RExC_state;
- } else {
- U32 seen=RExC_seen;
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log,"Restudying\n"));
-
- RExC_state = copyRExC_state;
- if (seen & REG_TOP_LEVEL_BRANCHES)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
- else
- RExC_seen &= ~REG_TOP_LEVEL_BRANCHES;
- if (data.last_found) {
- SvREFCNT_dec(data.longest_fixed);
- SvREFCNT_dec(data.longest_float);
- SvREFCNT_dec(data.last_found);
- }
- StructCopy(&zero_scan_data, &data, scan_data_t);
- }
-#else
- StructCopy(&zero_scan_data, &data, scan_data_t);
-#endif
-
- /* Dig out information for optimizations. */
- r->extflags = RExC_flags; /* was pm_op */
- /*dmq: removed as part of de-PMOP: pm->op_pmflags = RExC_flags; */
-
- if (UTF)
- SvUTF8_on(rx); /* Unicode in it? */
- ri->regstclass = NULL;
- if (RExC_naughty >= 10) /* Probably an expensive pattern. */
- r->intflags |= PREGf_NAUGHTY;
- scan = ri->program + 1; /* First BRANCH. */
-
- /* testing for BRANCH here tells us whether there is "must appear"
- data in the pattern. If there is then we can use it for optimisations */
- if (!(RExC_seen & REG_TOP_LEVEL_BRANCHES)) { /* Only one top-level choice. */
- I32 fake;
- STRLEN longest_float_length, longest_fixed_length;
- struct regnode_charclass_class ch_class; /* pointed to by data */
- int stclass_flag;
- I32 last_close = 0; /* pointed to by data */
- regnode *first= scan;
- regnode *first_next= regnext(first);
-
- /*
- * Skip introductions and multiplicators >= 1
- * so that we can extract the 'meat' of the pattern that must
- * match in the large if() sequence following.
- * NOTE that EXACT is NOT covered here, as it is normally
- * picked up by the optimiser separately.
- *
- * This is unfortunate as the optimiser isnt handling lookahead
- * properly currently.
- *
- */
- while ((OP(first) == OPEN && (sawopen = 1)) ||
- /* An OR of *one* alternative - should not happen now. */
- (OP(first) == BRANCH && OP(first_next) != BRANCH) ||
- /* for now we can't handle lookbehind IFMATCH*/
- (OP(first) == IFMATCH && !first->flags) ||
- (OP(first) == PLUS) ||
- (OP(first) == MINMOD) ||
- /* An {n,m} with n>0 */
- (PL_regkind[OP(first)] == CURLY && ARG1(first) > 0) ||
- (OP(first) == NOTHING && PL_regkind[OP(first_next)] != END ))
- {
- /*
- * the only op that could be a regnode is PLUS, all the rest
- * will be regnode_1 or regnode_2.
- *
- */
- if (OP(first) == PLUS)
- sawplus = 1;
- else
- first += regarglen[OP(first)];
-
- first = NEXTOPER(first);
- first_next= regnext(first);
- }
-
- /* Starting-point info. */
- again:
- DEBUG_PEEP("first:",first,0);
- /* Ignore EXACT as we deal with it later. */
- if (PL_regkind[OP(first)] == EXACT) {
- if (OP(first) == EXACT)
- NOOP; /* Empty, get anchored substr later. */
- else if ((OP(first) == EXACTF || OP(first) == EXACTFL))
- ri->regstclass = first;
- }
-#ifdef TRIE_STCLASS
- else if (PL_regkind[OP(first)] == TRIE &&
- ((reg_trie_data *)ri->data->data[ ARG(first) ])->minlen>0)
- {
- regnode *trie_op;
- /* this can happen only on restudy */
- if ( OP(first) == TRIE ) {
- struct regnode_1 *trieop = (struct regnode_1 *)
- PerlMemShared_calloc(1, sizeof(struct regnode_1));
- StructCopy(first,trieop,struct regnode_1);
- trie_op=(regnode *)trieop;
- } else {
- struct regnode_charclass *trieop = (struct regnode_charclass *)
- PerlMemShared_calloc(1, sizeof(struct regnode_charclass));
- StructCopy(first,trieop,struct regnode_charclass);
- trie_op=(regnode *)trieop;
- }
- OP(trie_op)+=2;
- make_trie_failtable(pRExC_state, (regnode *)first, trie_op, 0);
- ri->regstclass = trie_op;
- }
-#endif
- else if (strchr((const char*)PL_simple,OP(first)))
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOUND ||
- PL_regkind[OP(first)] == NBOUND)
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOL) {
- r->extflags |= (OP(first) == MBOL
- ? RXf_ANCH_MBOL
- : (OP(first) == SBOL
- ? RXf_ANCH_SBOL
- : RXf_ANCH_BOL));
- first = NEXTOPER(first);
- goto again;
- }
- else if (OP(first) == GPOS) {
- r->extflags |= RXf_ANCH_GPOS;
- first = NEXTOPER(first);
- goto again;
- }
- else if ((!sawopen || !RExC_sawback) &&
- (OP(first) == STAR &&
- PL_regkind[OP(NEXTOPER(first))] == REG_ANY) &&
- !(r->extflags & RXf_ANCH) && !(RExC_seen & REG_SEEN_EVAL))
- {
- /* turn .* into ^.* with an implied $*=1 */
- const int type =
- (OP(NEXTOPER(first)) == REG_ANY)
- ? RXf_ANCH_MBOL
- : RXf_ANCH_SBOL;
- r->extflags |= type;
- r->intflags |= PREGf_IMPLICIT;
- first = NEXTOPER(first);
- goto again;
- }
- if (sawplus && (!sawopen || !RExC_sawback)
- && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */
- /* x+ must match at the 1st pos of run of x's */
- r->intflags |= PREGf_SKIP;
-
- /* Scan is after the zeroth branch, first is atomic matcher. */
-#ifdef TRIE_STUDY_OPT
- DEBUG_PARSE_r(
- if (!restudied)
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#else
- DEBUG_PARSE_r(
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#endif
-
-
- /*
- * If there's something expensive in the r.e., find the
- * longest literal string that must appear and make it the
- * regmust. Resolve ties in favor of later strings, since
- * the regstart check works with the beginning of the r.e.
- * and avoiding duplication strengthens checking. Not a
- * strong reason, but sufficient in the absence of others.
- * [Now we resolve ties in favor of the earlier string if
- * it happens that c_offset_min has been invalidated, since the
- * earlier string may buy us something the later one won't.]
- */
-
- data.longest_fixed = newSVpvs("");
- data.longest_float = newSVpvs("");
- data.last_found = newSVpvs("");
- data.longest = &(data.longest_fixed);
- first = scan;
- if (!ri->regstclass) {
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- stclass_flag = SCF_DO_STCLASS_AND;
- } else /* XXXX Check for BOUND? */
- stclass_flag = 0;
- data.last_closep = &last_close;
-
- minlen = study_chunk(pRExC_state, &first, &minlen, &fake, scan + RExC_size, /* Up to end */
- &data, -1, NULL, NULL,
- SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag,0);
-
-
- CHECK_RESTUDY_GOTO;
-
-
- if ( RExC_npar == 1 && data.longest == &(data.longest_fixed)
- && data.last_start_min == 0 && data.last_end > 0
- && !RExC_seen_zerolen
- && !(RExC_seen & REG_SEEN_VERBARG)
- && (!(RExC_seen & REG_SEEN_GPOS) || (r->extflags & RXf_ANCH_GPOS)))
- r->extflags |= RXf_CHECK_ALL;
- scan_commit(pRExC_state, &data,&minlen,0);
- SvREFCNT_dec(data.last_found);
-
- /* Note that code very similar to this but for anchored string
- follows immediately below, changes may need to be made to both.
- Be careful.
- */
- longest_float_length = CHR_SVLEN(data.longest_float);
- if (longest_float_length
- || (data.flags & SF_FL_BEFORE_EOL
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */
- && data.offset_fixed == data.offset_float_min
- && SvCUR(data.longest_fixed) == SvCUR(data.longest_float))
- goto remove_float; /* As in (a)+. */
-
- /* copy the information about the longest float from the reg_scan_data
- over to the program. */
- if (SvUTF8(data.longest_float)) {
- r->float_utf8 = data.longest_float;
- r->float_substr = NULL;
- } else {
- r->float_substr = data.longest_float;
- r->float_utf8 = NULL;
- }
- /* float_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_float ? *(data.minlen_float)
- : (I32)longest_float_length;
- r->float_end_shift = ml - data.offset_float_min
- - longest_float_length + (SvTAIL(data.longest_float) != 0)
- + data.lookbehind_float;
- r->float_min_offset = data.offset_float_min - data.lookbehind_float;
- r->float_max_offset = data.offset_float_max;
- if (data.offset_float_max < I32_MAX) /* Don't offset infinity */
- r->float_max_offset -= data.lookbehind_float;
-
- t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_float, t ? FBMcf_TAIL : 0);
- }
- else {
- remove_float:
- r->float_substr = r->float_utf8 = NULL;
- SvREFCNT_dec(data.longest_float);
- longest_float_length = 0;
- }
-
- /* Note that code very similar to this but for floating string
- is immediately above, changes may need to be made to both.
- Be careful.
- */
- longest_fixed_length = CHR_SVLEN(data.longest_fixed);
- if (longest_fixed_length
- || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- /* copy the information about the longest fixed
- from the reg_scan_data over to the program. */
- if (SvUTF8(data.longest_fixed)) {
- r->anchored_utf8 = data.longest_fixed;
- r->anchored_substr = NULL;
- } else {
- r->anchored_substr = data.longest_fixed;
- r->anchored_utf8 = NULL;
- }
- /* fixed_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_fixed ? *(data.minlen_fixed)
- : (I32)longest_fixed_length;
- r->anchored_end_shift = ml - data.offset_fixed
- - longest_fixed_length + (SvTAIL(data.longest_fixed) != 0)
- + data.lookbehind_fixed;
- r->anchored_offset = data.offset_fixed - data.lookbehind_fixed;
-
- t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_fixed, t ? FBMcf_TAIL : 0);
- }
- else {
- r->anchored_substr = r->anchored_utf8 = NULL;
- SvREFCNT_dec(data.longest_fixed);
- longest_fixed_length = 0;
- }
- if (ri->regstclass
- && (OP(ri->regstclass) == REG_ANY || OP(ri->regstclass) == SANY))
- ri->regstclass = NULL;
- if ((!(r->anchored_substr || r->anchored_utf8) || r->anchored_offset)
- && stclass_flag
- && !(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV *sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
-
- /* A temporary algorithm prefers floated substr to fixed one to dig more info. */
- if (longest_fixed_length > longest_float_length) {
- r->check_end_shift = r->anchored_end_shift;
- r->check_substr = r->anchored_substr;
- r->check_utf8 = r->anchored_utf8;
- r->check_offset_min = r->check_offset_max = r->anchored_offset;
- if (r->extflags & RXf_ANCH_SINGLE)
- r->extflags |= RXf_NOSCAN;
- }
- else {
- r->check_end_shift = r->float_end_shift;
- r->check_substr = r->float_substr;
- r->check_utf8 = r->float_utf8;
- r->check_offset_min = r->float_min_offset;
- r->check_offset_max = r->float_max_offset;
- }
- /* XXXX Currently intuiting is not compatible with ANCH_GPOS.
- This should be changed ASAP! */
- if ((r->check_substr || r->check_utf8) && !(r->extflags & RXf_ANCH_GPOS)) {
- r->extflags |= RXf_USE_INTUIT;
- if (SvTAIL(r->check_substr ? r->check_substr : r->check_utf8))
- r->extflags |= RXf_INTUIT_TAIL;
- }
- /* XXX Unneeded? dmq (shouldn't as this is handled elsewhere)
- if ( (STRLEN)minlen < longest_float_length )
- minlen= longest_float_length;
- if ( (STRLEN)minlen < longest_fixed_length )
- minlen= longest_fixed_length;
- */
- }
- else {
- /* Several toplevels. Best we can is to set minlen. */
- I32 fake;
- struct regnode_charclass_class ch_class;
- I32 last_close = 0;
-
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "\nMulti Top Level\n"));
-
- scan = ri->program + 1;
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- data.last_closep = &last_close;
-
-
- minlen = study_chunk(pRExC_state, &scan, &minlen, &fake, scan + RExC_size,
- &data, -1, NULL, NULL, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS,0);
-
- CHECK_RESTUDY_GOTO;
-
- r->check_substr = r->check_utf8 = r->anchored_substr = r->anchored_utf8
- = r->float_substr = r->float_utf8 = NULL;
- if (!(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV* sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
- }
-
- /* Guard against an embedded (?=) or (?<=) with a longer minlen than
- the "real" pattern. */
- DEBUG_OPTIMISE_r({
- PerlIO_printf(Perl_debug_log,"minlen: %"IVdf" r->minlen:%"IVdf"\n",
- (IV)minlen, (IV)r->minlen);
- });
- r->minlenret = minlen;
- if (r->minlen < minlen)
- r->minlen = minlen;
-
- if (RExC_seen & REG_SEEN_GPOS)
- r->extflags |= RXf_GPOS_SEEN;
- if (RExC_seen & REG_SEEN_LOOKBEHIND)
- r->extflags |= RXf_LOOKBEHIND_SEEN;
- if (RExC_seen & REG_SEEN_EVAL)
- r->extflags |= RXf_EVAL_SEEN;
- if (RExC_seen & REG_SEEN_CANY)
- r->extflags |= RXf_CANY_SEEN;
- if (RExC_seen & REG_SEEN_VERBARG)
- r->intflags |= PREGf_VERBARG_SEEN;
- if (RExC_seen & REG_SEEN_CUTGROUP)
- r->intflags |= PREGf_CUTGROUP_SEEN;
- if (RExC_paren_names)
- RXp_PAREN_NAMES(r) = MUTABLE_HV(SvREFCNT_inc(RExC_paren_names));
- else
- RXp_PAREN_NAMES(r) = NULL;
-
-#ifdef STUPID_PATTERN_CHECKS
- if (RX_PRELEN(rx) == 0)
- r->extflags |= RXf_NULL;
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else if (RX_PRELEN(rx) == 3 && memEQ("\\s+", RX_PRECOMP(rx), 3))
- r->extflags |= RXf_WHITE;
- else if (RX_PRELEN(rx) == 1 && RXp_PRECOMP(rx)[0] == '^')
- r->extflags |= RXf_START_ONLY;
-#else
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else {
- regnode *first = ri->program + 1;
- U8 fop = OP(first);
- U8 nop = OP(NEXTOPER(first));
-
- if (PL_regkind[fop] == NOTHING && nop == END)
- r->extflags |= RXf_NULL;
- else if (PL_regkind[fop] == BOL && nop == END)
- r->extflags |= RXf_START_ONLY;
- else if (fop == PLUS && nop ==SPACE && OP(regnext(first))==END)
- r->extflags |= RXf_WHITE;
- }
-#endif
-#ifdef DEBUGGING
- if (RExC_paren_names) {
- ri->name_list_idx = add_data( pRExC_state, 1, "p" );
- ri->data->data[ri->name_list_idx] = (void*)SvREFCNT_inc(RExC_paren_name_list);
- } else
-#endif
- ri->name_list_idx = 0;
-
- if (RExC_recurse_count) {
- for ( ; RExC_recurse_count ; RExC_recurse_count-- ) {
- const regnode *scan = RExC_recurse[RExC_recurse_count-1];
- ARG2L_SET( scan, RExC_open_parens[ARG(scan)-1] - scan );
- }
- }
- Newxz(r->offs, RExC_npar, regexp_paren_pair);
- /* assume we don't need to swap parens around before we match */
-
- DEBUG_DUMP_r({
- PerlIO_printf(Perl_debug_log,"Final program:\n");
- regdump(r);
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_OFFSETS_r(if (ri->u.offsets) {
- const U32 len = ri->u.offsets[0];
- U32 i;
- GET_RE_DEBUG_FLAGS_DECL;
- PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)ri->u.offsets[0]);
- for (i = 1; i <= len; i++) {
- if (ri->u.offsets[i*2-1] || ri->u.offsets[i*2])
- PerlIO_printf(Perl_debug_log, "%"UVuf":%"UVuf"[%"UVuf"] ",
- (UV)i, (UV)ri->u.offsets[i*2-1], (UV)ri->u.offsets[i*2]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
-#endif
- return rx;
-}
-
-#undef RE_ENGINE_PTR
-
-
-SV*
-Perl_reg_named_buff(pTHX_ REGEXP * const rx, SV * const key, SV * const value,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF;
-
- PERL_UNUSED_ARG(value);
-
- if (flags & RXapif_FETCH) {
- return reg_named_buff_fetch(rx, key, flags);
- } else if (flags & (RXapif_STORE | RXapif_DELETE | RXapif_CLEAR)) {
- Perl_croak(aTHX_ "%s", PL_no_modify);
- return NULL;
- } else if (flags & RXapif_EXISTS) {
- return reg_named_buff_exists(rx, key, flags)
- ? &PL_sv_yes
- : &PL_sv_no;
- } else if (flags & RXapif_REGNAMES) {
- return reg_named_buff_all(rx, flags);
- } else if (flags & (RXapif_SCALAR | RXapif_REGNAMES_COUNT)) {
- return reg_named_buff_scalar(rx, flags);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_iter(pTHX_ REGEXP * const rx, const SV * const lastkey,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ITER;
- PERL_UNUSED_ARG(lastkey);
-
- if (flags & RXapif_FIRSTKEY)
- return reg_named_buff_firstkey(rx, flags);
- else if (flags & RXapif_NEXTKEY)
- return reg_named_buff_nextkey(rx, flags);
- else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_iter", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_fetch(pTHX_ REGEXP * const r, SV * const namesv,
- const U32 flags)
-{
- AV *retarray = NULL;
- SV *ret;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FETCH;
-
- if (flags & RXapif_ALL)
- retarray=newAV();
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HE *he_str = hv_fetch_ent( RXp_PAREN_NAMES(rx), namesv, 0, 0 );
- if (he_str) {
- IV i;
- SV* sv_dat=HeVAL(he_str);
- I32 *nums=(I32*)SvPVX(sv_dat);
- for ( i=0; i<SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->nparens) >= nums[i]
- && rx->offs[nums[i]].start != -1
- && rx->offs[nums[i]].end != -1)
- {
- ret = newSVpvs("");
- CALLREG_NUMBUF_FETCH(r,nums[i],ret);
- if (!retarray)
- return ret;
- } else {
- ret = newSVsv(&PL_sv_undef);
- }
- if (retarray)
- av_push(retarray, ret);
- }
- if (retarray)
- return newRV_noinc(MUTABLE_SV(retarray));
- }
- }
- return NULL;
-}
-
-bool
-Perl_reg_named_buff_exists(pTHX_ REGEXP * const r, SV * const key,
- const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_EXISTS;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & RXapif_ALL) {
- return hv_exists_ent(RXp_PAREN_NAMES(rx), key, 0);
- } else {
- SV *sv = CALLREG_NAMED_BUFF_FETCH(r, key, flags);
- if (sv) {
- SvREFCNT_dec(sv);
- return TRUE;
- } else {
- return FALSE;
- }
- }
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_firstkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FIRSTKEY;
-
- if ( rx && RXp_PAREN_NAMES(rx) ) {
- (void)hv_iterinit(RXp_PAREN_NAMES(rx));
-
- return CALLREG_NAMED_BUFF_NEXTKEY(r, NULL, flags & ~RXapif_FIRSTKEY);
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_nextkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_NEXTKEY;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv = RXp_PAREN_NAMES(rx);
- HE *temphe;
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- return newSVhek(HeKEY_hek(temphe));
- }
- }
- }
- return NULL;
-}
-
-SV*
-Perl_reg_named_buff_scalar(pTHX_ REGEXP * const r, const U32 flags)
-{
- SV *ret;
- AV *av;
- I32 length;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_SCALAR;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & (RXapif_ALL | RXapif_REGNAMES_COUNT)) {
- return newSViv(HvTOTALKEYS(RXp_PAREN_NAMES(rx)));
- } else if (flags & RXapif_ONE) {
- ret = CALLREG_NAMED_BUFF_ALL(r, (flags | RXapif_REGNAMES));
- av = MUTABLE_AV(SvRV(ret));
- length = av_len(av);
- SvREFCNT_dec(ret);
- return newSViv(length + 1);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_scalar", (int)flags);
- return NULL;
- }
- }
- return &PL_sv_undef;
-}
-
-SV*
-Perl_reg_named_buff_all(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- AV *av = newAV();
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ALL;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv= RXp_PAREN_NAMES(rx);
- HE *temphe;
- (void)hv_iterinit(hv);
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- av_push(av, newSVhek(HeKEY_hek(temphe)));
- }
- }
- }
-
- return newRV_noinc(MUTABLE_SV(av));
-}
-
-void
-Perl_reg_numbered_buff_fetch(pTHX_ REGEXP * const r, const I32 paren,
- SV * const sv)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- char *s = NULL;
- I32 i = 0;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_FETCH;
-
- if (!rx->subbeg) {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- else
- if (paren == RX_BUFF_IDX_PREMATCH && rx->offs[0].start != -1) {
- /* $` */
- i = rx->offs[0].start;
- s = rx->subbeg;
- }
- else
- if (paren == RX_BUFF_IDX_POSTMATCH && rx->offs[0].end != -1) {
- /* $' */
- s = rx->subbeg + rx->offs[0].end;
- i = rx->sublen - rx->offs[0].end;
- }
- else
- if ( 0 <= paren && paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- /* $& $1 ... */
- i = t1 - s1;
- s = rx->subbeg + s1;
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- assert(rx->sublen >= (s - rx->subbeg) + i );
- if (i >= 0) {
- const int oldtainted = PL_tainted;
- TAINT_NOT;
- sv_setpvn(sv, s, i);
- PL_tainted = oldtainted;
- if ( (rx->extflags & RXf_CANY_SEEN)
- ? (RXp_MATCH_UTF8(rx)
- && (!i || is_utf8_string((U8*)s, i)))
- : (RXp_MATCH_UTF8(rx)) )
- {
- SvUTF8_on(sv);
- }
- else
- SvUTF8_off(sv);
- if (PL_tainting) {
- if (RXp_MATCH_TAINTED(rx)) {
- if (SvTYPE(sv) >= SVt_PVMG) {
- MAGIC* const mg = SvMAGIC(sv);
- MAGIC* mgt;
- PL_tainted = 1;
- SvMAGIC_set(sv, mg->mg_moremagic);
- SvTAINT(sv);
- if ((mgt = SvMAGIC(sv))) {
- mg->mg_moremagic = mgt;
- SvMAGIC_set(sv, mg);
- }
- } else {
- PL_tainted = 1;
- SvTAINT(sv);
- }
- } else
- SvTAINTED_off(sv);
- }
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
-}
-
-void
-Perl_reg_numbered_buff_store(pTHX_ REGEXP * const rx, const I32 paren,
- SV const * const value)
-{
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_STORE;
-
- PERL_UNUSED_ARG(rx);
- PERL_UNUSED_ARG(paren);
- PERL_UNUSED_ARG(value);
-
- if (!PL_localizing)
- Perl_croak(aTHX_ "%s", PL_no_modify);
-}
-
-I32
-Perl_reg_numbered_buff_length(pTHX_ REGEXP * const r, const SV * const sv,
- const I32 paren)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- I32 i;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_LENGTH;
-
- /* Some of this code was originally in C<Perl_magic_len> in F<mg.c> */
- switch (paren) {
- /* $` / ${^PREMATCH} */
- case RX_BUFF_IDX_PREMATCH:
- if (rx->offs[0].start != -1) {
- i = rx->offs[0].start;
- if (i > 0) {
- s1 = 0;
- t1 = i;
- goto getlen;
- }
- }
- return 0;
- /* $' / ${^POSTMATCH} */
- case RX_BUFF_IDX_POSTMATCH:
- if (rx->offs[0].end != -1) {
- i = rx->sublen - rx->offs[0].end;
- if (i > 0) {
- s1 = rx->offs[0].end;
- t1 = rx->sublen;
- goto getlen;
- }
- }
- return 0;
- /* $& / ${^MATCH}, $1, $2, ... */
- default:
- if (paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- i = t1 - s1;
- goto getlen;
- } else {
- if (ckWARN(WARN_UNINITIALIZED))
- report_uninit((const SV *)sv);
- return 0;
- }
- }
- getlen:
- if (i > 0 && RXp_MATCH_UTF8(rx)) {
- const char * const s = rx->subbeg + s1;
- const U8 *ep;
- STRLEN el;
-
- i = t1 - s1;
- if (is_utf8_string_loclen((U8*)s, i, &ep, &el))
- i = el;
- }
- return i;
-}
-
-SV*
-Perl_reg_qr_package(pTHX_ REGEXP * const rx)
-{
- PERL_ARGS_ASSERT_REG_QR_PACKAGE;
- PERL_UNUSED_ARG(rx);
- if (0)
- return NULL;
- else
- return newSVpvs("Regexp");
-}
-
-/* Scans the name of a named buffer from the pattern.
- * If flags is REG_RSN_RETURN_NULL returns null.
- * If flags is REG_RSN_RETURN_NAME returns an SV* containing the name
- * If flags is REG_RSN_RETURN_DATA returns the data SV* corresponding
- * to the parsed name as looked up in the RExC_paren_names hash.
- * If there is an error throws a vFAIL().. type exception.
- */
-
-#define REG_RSN_RETURN_NULL 0
-#define REG_RSN_RETURN_NAME 1
-#define REG_RSN_RETURN_DATA 2
-
-STATIC SV*
-S_reg_scan_name(pTHX_ RExC_state_t *pRExC_state, U32 flags)
-{
- char *name_start = RExC_parse;
-
- PERL_ARGS_ASSERT_REG_SCAN_NAME;
-
- if (isIDFIRST_lazy_if(RExC_parse, UTF)) {
- /* skip IDFIRST by using do...while */
- if (UTF)
- do {
- RExC_parse += UTF8SKIP(RExC_parse);
- } while (isALNUM_utf8((U8*)RExC_parse));
- else
- do {
- RExC_parse++;
- } while (isALNUM(*RExC_parse));
- }
-
- if ( flags ) {
- SV* sv_name
- = newSVpvn_flags(name_start, (int)(RExC_parse - name_start),
- SVs_TEMP | (UTF ? SVf_UTF8 : 0));
- if ( flags == REG_RSN_RETURN_NAME)
- return sv_name;
- else if (flags==REG_RSN_RETURN_DATA) {
- HE *he_str = NULL;
- SV *sv_dat = NULL;
- if ( ! sv_name ) /* should not happen*/
- Perl_croak(aTHX_ "panic: no svname in reg_scan_name");
- if (RExC_paren_names)
- he_str = hv_fetch_ent( RExC_paren_names, sv_name, 0, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat )
- vFAIL("Reference to nonexistent named group");
- return sv_dat;
- }
- else {
- Perl_croak(aTHX_ "panic: bad flag in reg_scan_name");
- }
- /* NOT REACHED */
- }
- return NULL;
-}
-
-#define DEBUG_PARSE_MSG(funcname) DEBUG_PARSE_r({ \
- int rem=(int)(RExC_end - RExC_parse); \
- int cut; \
- int num; \
- int iscut=0; \
- if (rem>10) { \
- rem=10; \
- iscut=1; \
- } \
- cut=10-rem; \
- if (RExC_lastparse!=RExC_parse) \
- PerlIO_printf(Perl_debug_log," >%.*s%-*s", \
- rem, RExC_parse, \
- cut + 4, \
- iscut ? "..." : "<" \
- ); \
- else \
- PerlIO_printf(Perl_debug_log,"%16s",""); \
- \
- if (SIZE_ONLY) \
- num = RExC_size + 1; \
- else \
- num=REG_NODE_NUM(RExC_emit); \
- if (RExC_lastnum!=num) \
- PerlIO_printf(Perl_debug_log,"|%4d",num); \
- else \
- PerlIO_printf(Perl_debug_log,"|%4s",""); \
- PerlIO_printf(Perl_debug_log,"|%*s%-4s", \
- (int)((depth*2)), "", \
- (funcname) \
- ); \
- RExC_lastnum=num; \
- RExC_lastparse=RExC_parse; \
-})
-
-
-
-#define DEBUG_PARSE(funcname) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,"%4s","\n"); \
-})
-#define DEBUG_PARSE_FMT(funcname,fmt,args) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,fmt "\n",args); \
-})
-/*
- - reg - regular expression, i.e. main body or parenthesized thing
- *
- * Caller must absorb opening parenthesis.
- *
- * Combining parenthesis handling with the base level of regular expression
- * is a trifle forced, but the need to tie the tails of the branches to what
- * follows makes it hard to avoid.
- */
-#define REGTAIL(x,y,z) regtail((x),(y),(z),depth+1)
-#ifdef DEBUGGING
-#define REGTAIL_STUDY(x,y,z) regtail_study((x),(y),(z),depth+1)
-#else
-#define REGTAIL_STUDY(x,y,z) regtail((x),(y),(z),depth+1)
-#endif
-
-STATIC regnode *
-S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth)
- /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */
-{
- dVAR;
- register regnode *ret; /* Will be the head of the group. */
- register regnode *br;
- register regnode *lastbr;
- register regnode *ender = NULL;
- register I32 parno = 0;
- I32 flags;
- U32 oregflags = RExC_flags;
- bool have_branch = 0;
- bool is_open = 0;
- I32 freeze_paren = 0;
- I32 after_freeze = 0;
-
- /* for (?g), (?gc), and (?o) warnings; warning
- about (?c) will warn about (?g) -- japhy */
-
-#define WASTED_O 0x01
-#define WASTED_G 0x02
-#define WASTED_C 0x04
-#define WASTED_GC (0x02|0x04)
- I32 wastedflags = 0x00;
-
- char * parse_start = RExC_parse; /* MJD */
- char * const oregcomp_parse = RExC_parse;
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG;
- DEBUG_PARSE("reg ");
-
- *flagp = 0; /* Tentatively. */
-
-
- /* Make an OPEN node, if parenthesized. */
- if (paren) {
- if ( *RExC_parse == '*') { /* (*VERB:ARG) */
- char *start_verb = RExC_parse;
- STRLEN verb_len = 0;
- char *start_arg = NULL;
- unsigned char op = 0;
- int argok = 1;
- int internal_argval = 0; /* internal_argval is only useful if !argok */
- while ( *RExC_parse && *RExC_parse != ')' ) {
- if ( *RExC_parse == ':' ) {
- start_arg = RExC_parse + 1;
- break;
- }
- RExC_parse++;
- }
- ++start_verb;
- verb_len = RExC_parse - start_verb;
- if ( start_arg ) {
- RExC_parse++;
- while ( *RExC_parse && *RExC_parse != ')' )
- RExC_parse++;
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern argument");
- if ( RExC_parse == start_arg )
- start_arg = NULL;
- } else {
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern");
- }
-
- switch ( *start_verb ) {
- case 'A': /* (*ACCEPT) */
- if ( memEQs(start_verb,verb_len,"ACCEPT") ) {
- op = ACCEPT;
- internal_argval = RExC_nestroot;
- }
- break;
- case 'C': /* (*COMMIT) */
- if ( memEQs(start_verb,verb_len,"COMMIT") )
- op = COMMIT;
- break;
- case 'F': /* (*FAIL) */
- if ( verb_len==1 || memEQs(start_verb,verb_len,"FAIL") ) {
- op = OPFAIL;
- argok = 0;
- }
- break;
- case ':': /* (*:NAME) */
- case 'M': /* (*MARK:NAME) */
- if ( verb_len==0 || memEQs(start_verb,verb_len,"MARK") ) {
- op = MARKPOINT;
- argok = -1;
- }
- break;
- case 'P': /* (*PRUNE) */
- if ( memEQs(start_verb,verb_len,"PRUNE") )
- op = PRUNE;
- break;
- case 'S': /* (*SKIP) */
- if ( memEQs(start_verb,verb_len,"SKIP") )
- op = SKIP;
- break;
- case 'T': /* (*THEN) */
- /* [19:06] <TimToady> :: is then */
- if ( memEQs(start_verb,verb_len,"THEN") ) {
- op = CUTGROUP;
- RExC_seen |= REG_SEEN_CUTGROUP;
- }
- break;
- }
- if ( ! op ) {
- RExC_parse++;
- vFAIL3("Unknown verb pattern '%.*s'",
- verb_len, start_verb);
- }
- if ( argok ) {
- if ( start_arg && internal_argval ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else if ( argok < 0 && !start_arg ) {
- vFAIL3("Verb pattern '%.*s' has a mandatory argument",
- verb_len, start_verb);
- } else {
- ret = reganode(pRExC_state, op, internal_argval);
- if ( ! internal_argval && ! SIZE_ONLY ) {
- if (start_arg) {
- SV *sv = newSVpvn( start_arg, RExC_parse - start_arg);
- ARG(ret) = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[ARG(ret)]=(void*)sv;
- ret->flags = 0;
- } else {
- ret->flags = 1;
- }
- }
- }
- if (!internal_argval)
- RExC_seen |= REG_SEEN_VERBARG;
- } else if ( start_arg ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else {
- ret = reg_node(pRExC_state, op);
- }
- nextchar(pRExC_state);
- return ret;
- } else
- if (*RExC_parse == '?') { /* (?...) */
- bool is_logical = 0;
- const char * const seqstart = RExC_parse;
-
- RExC_parse++;
- paren = *RExC_parse++;
- ret = NULL; /* For look-ahead/behind. */
- switch (paren) {
-
- case 'P': /* (?P...) variants for those used to PCRE/Python */
- paren = *RExC_parse++;
- if ( paren == '<') /* (?P<...>) named capture */
- goto named_capture;
- else if (paren == '>') { /* (?P>name) named recursion */
- goto named_recursion;
- }
- else if (paren == '=') { /* (?P=...) named backref */
- /* this pretty much dupes the code for \k<NAME> in regatom(), if
- you change this make sure you change that */
- char* name_start = RExC_parse;
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ')')
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
-
- nextchar(pRExC_state);
- return ret;
- }
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- case '<': /* (?<...) */
- if (*RExC_parse == '!')
- paren = ',';
- else if (*RExC_parse != '=')
- named_capture:
- { /* (?<...>) */
- char *name_start;
- SV *svname;
- paren= '>';
- case '\'': /* (?'...') */
- name_start= RExC_parse;
- svname = reg_scan_name(pRExC_state,
- SIZE_ONLY ? /* reverse test from the others */
- REG_RSN_RETURN_NAME :
- REG_RSN_RETURN_NULL);
- if (RExC_parse == name_start) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- if (*RExC_parse != paren)
- vFAIL2("Sequence (?%c... not terminated",
- paren=='>' ? '<' : paren);
- if (SIZE_ONLY) {
- HE *he_str;
- SV *sv_dat = NULL;
- if (!svname) /* shouldnt happen */
- Perl_croak(aTHX_
- "panic: reg_scan_name returned NULL");
- if (!RExC_paren_names) {
- RExC_paren_names= newHV();
- sv_2mortal(MUTABLE_SV(RExC_paren_names));
-#ifdef DEBUGGING
- RExC_paren_name_list= newAV();
- sv_2mortal(MUTABLE_SV(RExC_paren_name_list));
-#endif
- }
- he_str = hv_fetch_ent( RExC_paren_names, svname, 1, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat ) {
- /* croak baby croak */
- Perl_croak(aTHX_
- "panic: paren_name hash element allocation failed");
- } else if ( SvPOK(sv_dat) ) {
- /* (?|...) can mean we have dupes so scan to check
- its already been stored. Maybe a flag indicating
- we are inside such a construct would be useful,
- but the arrays are likely to be quite small, so
- for now we punt -- dmq */
- IV count = SvIV(sv_dat);
- I32 *pv = (I32*)SvPVX(sv_dat);
- IV i;
- for ( i = 0 ; i < count ; i++ ) {
- if ( pv[i] == RExC_npar ) {
- count = 0;
- break;
- }
- }
- if ( count ) {
- pv = (I32*)SvGROW(sv_dat, SvCUR(sv_dat) + sizeof(I32)+1);
- SvCUR_set(sv_dat, SvCUR(sv_dat) + sizeof(I32));
- pv[count] = RExC_npar;
- SvIV_set(sv_dat, SvIVX(sv_dat) + 1);
- }
- } else {
- (void)SvUPGRADE(sv_dat,SVt_PVNV);
- sv_setpvn(sv_dat, (char *)&(RExC_npar), sizeof(I32));
- SvIOK_on(sv_dat);
- SvIV_set(sv_dat, 1);
- }
-#ifdef DEBUGGING
- if (!av_store(RExC_paren_name_list, RExC_npar, SvREFCNT_inc(svname)))
- SvREFCNT_dec(svname);
-#endif
-
- /*sv_dump(sv_dat);*/
- }
- nextchar(pRExC_state);
- paren = 1;
- goto capturing_parens;
- }
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- RExC_parse++;
- case '=': /* (?=...) */
- RExC_seen_zerolen++;
- break;
- case '!': /* (?!...) */
- RExC_seen_zerolen++;
- if (*RExC_parse == ')') {
- ret=reg_node(pRExC_state, OPFAIL);
- nextchar(pRExC_state);
- return ret;
- }
- break;
- case '|': /* (?|...) */
- /* branch reset, behave like a (?:...) except that
- buffers in alternations share the same numbers */
- paren = ':';
- after_freeze = freeze_paren = RExC_npar;
- break;
- case ':': /* (?:...) */
- case '>': /* (?>...) */
- break;
- case '$': /* (?$...) */
- case '@': /* (?@...) */
- vFAIL2("Sequence (?%c...) not implemented", (int)paren);
- break;
- case '#': /* (?#...) */
- while (*RExC_parse && *RExC_parse != ')')
- RExC_parse++;
- if (*RExC_parse != ')')
- FAIL("Sequence (?#... not terminated");
- nextchar(pRExC_state);
- *flagp = TRYAGAIN;
- return NULL;
- case '0' : /* (?0) */
- case 'R' : /* (?R) */
- if (*RExC_parse != ')')
- FAIL("Sequence (?R) not terminated");
- ret = reg_node(pRExC_state, GOSTART);
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- /*notreached*/
- { /* named and numeric backreferences */
- I32 num;
- case '&': /* (?&NAME) */
- parse_start = RExC_parse - 1;
- named_recursion:
- {
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- num = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- goto gen_recurse_regop;
- /* NOT REACHED */
- case '+':
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse++;
- vFAIL("Illegal pattern");
- }
- goto parse_recursion;
- /* NOT REACHED*/
- case '-': /* (?-1) */
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse--; /* rewind to let it be handled later */
- goto parse_flags;
- }
- /*FALLTHROUGH */
- case '1': case '2': case '3': case '4': /* (?1) */
- case '5': case '6': case '7': case '8': case '9':
- RExC_parse--;
- parse_recursion:
- num = atoi(RExC_parse);
- parse_start = RExC_parse - 1; /* MJD */
- if (*RExC_parse == '-')
- RExC_parse++;
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (*RExC_parse!=')')
- vFAIL("Expecting close bracket");
-
- gen_recurse_regop:
- if ( paren == '-' ) {
- /*
- Diagram of capture buffer numbering.
- Top line is the normal capture buffer numbers
- Botton line is the negative indexing as from
- the X (the (?-2))
-
- + 1 2 3 4 5 X 6 7
- /(a(x)y)(a(b(c(?-2)d)e)f)(g(h))/
- - 5 4 3 2 1 X x x
-
- */
- num = RExC_npar + num;
- if (num < 1) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- } else if ( paren == '+' ) {
- num = RExC_npar + num - 1;
- }
-
- ret = reganode(pRExC_state, GOSUB, num);
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- ARG2L_SET( ret, RExC_recurse_count++);
- RExC_emit++;
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Recurse #%"UVuf" to %"IVdf"\n", (UV)ARG(ret), (IV)ARG2L(ret)));
- } else {
- RExC_size++;
- }
- RExC_seen |= REG_SEEN_RECURSE;
- Set_Node_Length(ret, 1 + regarglen[OP(ret)]); /* MJD */
- Set_Node_Offset(ret, parse_start); /* MJD */
-
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- } /* named and numeric backreferences */
- /* NOT REACHED */
-
- case '?': /* (??...) */
- is_logical = 1;
- if (*RExC_parse != '{') {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- *flagp |= POSTPONED;
- paren = *RExC_parse++;
- /* FALL THROUGH */
- case '{': /* (?{...}) */
- {
- I32 count = 1;
- U32 n = 0;
- char c;
- char *s = RExC_parse;
-
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_EVAL;
- while (count && (c = *RExC_parse)) {
- if (c == '\\') {
- if (RExC_parse[1])
- RExC_parse++;
- }
- else if (c == '{')
- count++;
- else if (c == '}')
- count--;
- RExC_parse++;
- }
- if (*RExC_parse != ')') {
- RExC_parse = s;
- vFAIL("Sequence (?{...}) not terminated or not {}-balanced");
- }
- if (!SIZE_ONLY) {
- PAD *pad;
- OP_4tree *sop, *rop;
- SV * const sv = newSVpvn(s, RExC_parse - 1 - s);
-
- ENTER;
- Perl_save_re_context(aTHX);
- rop = sv_compile_2op(sv, &sop, "re", &pad);
- sop->op_private |= OPpREFCOUNTED;
- /* re_dup will OpREFCNT_inc */
- OpREFCNT_set(sop, 1);
- LEAVE;
-
- n = add_data(pRExC_state, 3, "nop");
- RExC_rxi->data->data[n] = (void*)rop;
- RExC_rxi->data->data[n+1] = (void*)sop;
- RExC_rxi->data->data[n+2] = (void*)pad;
- SvREFCNT_dec(sv);
- }
- else { /* First pass */
- if (PL_reginterp_cnt < ++RExC_seen_evals
- && IN_PERL_RUNTIME)
- /* No compiled RE interpolated, has runtime
- components ===> unsafe. */
- FAIL("Eval-group not allowed at runtime, use re 'eval'");
- if (PL_tainting && PL_tainted)
- FAIL("Eval-group in insecure regular expression");
-#if PERL_VERSION > 8
- if (IN_PERL_COMPILETIME)
- PL_cv_has_eval = 1;
-#endif
- }
-
- nextchar(pRExC_state);
- if (is_logical) {
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 2;
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, EVAL, n));
- /* deal with the length of this later - MJD */
- return ret;
- }
- ret = reganode(pRExC_state, EVAL, n);
- Set_Node_Length(ret, RExC_parse - parse_start + 1);
- Set_Node_Offset(ret, parse_start);
- return ret;
- }
- case '(': /* (?(?{...})...) and (?(?=...)...) */
- {
- int is_define= 0;
- if (RExC_parse[0] == '?') { /* (?(?...)) */
- if (RExC_parse[1] == '=' || RExC_parse[1] == '!'
- || RExC_parse[1] == '<'
- || RExC_parse[1] == '{') { /* Lookahead or eval. */
- I32 flag;
-
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 1;
- REGTAIL(pRExC_state, ret, reg(pRExC_state, 1, &flag,depth+1));
- goto insert_if;
- }
- }
- else if ( RExC_parse[0] == '<' /* (?(<NAME>)...) */
- || RExC_parse[0] == '\'' ) /* (?('NAME')...) */
- {
- char ch = RExC_parse[0] == '<' ? '>' : '\'';
- char *name_start= RExC_parse++;
- U32 num = 0;
- SV *sv_dat=reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence (?(%c... not terminated",
- (ch == '>' ? '<' : ch));
- RExC_parse++;
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- ret = reganode(pRExC_state,NGROUPP,num);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'D' &&
- RExC_parse[1] == 'E' &&
- RExC_parse[2] == 'F' &&
- RExC_parse[3] == 'I' &&
- RExC_parse[4] == 'N' &&
- RExC_parse[5] == 'E')
- {
- ret = reganode(pRExC_state,DEFINEP,0);
- RExC_parse +=6 ;
- is_define = 1;
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'R') {
- RExC_parse++;
- parno = 0;
- if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- parno = atoi(RExC_parse++);
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- } else if (RExC_parse[0] == '&') {
- SV *sv_dat;
- RExC_parse++;
- sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- parno = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- ret = reganode(pRExC_state,INSUBP,parno);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- /* (?(1)...) */
- char c;
- parno = atoi(RExC_parse++);
-
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- ret = reganode(pRExC_state, GROUPP, parno);
-
- insert_if_check_paren:
- if ((c = *nextchar(pRExC_state)) != ')')
- vFAIL("Switch condition not recognized");
- insert_if:
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0));
- br = regbranch(pRExC_state, &flags, 1,depth+1);
- if (br == NULL)
- br = reganode(pRExC_state, LONGJMP, 0);
- else
- REGTAIL(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0));
- c = *nextchar(pRExC_state);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- if (c == '|') {
- if (is_define)
- vFAIL("(?(DEFINE)....) does not allow branches");
- lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */
- regbranch(pRExC_state, &flags, 1,depth+1);
- REGTAIL(pRExC_state, ret, lastbr);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- c = *nextchar(pRExC_state);
- }
- else
- lastbr = NULL;
- if (c != ')')
- vFAIL("Switch (?(condition)... contains too many branches");
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, br, ender);
- if (lastbr) {
- REGTAIL(pRExC_state, lastbr, ender);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender);
- }
- else
- REGTAIL(pRExC_state, ret, ender);
- RExC_size++; /* XXX WHY do we need this?!!
- For large programs it seems to be required
- but I can't figure out why. -- dmq*/
- return ret;
- }
- else {
- vFAIL2("Unknown switch condition (?(%.2s", RExC_parse);
- }
- }
- case 0:
- RExC_parse--; /* for vFAIL to print correctly */
- vFAIL("Sequence (? incomplete");
- break;
- default:
- --RExC_parse;
- parse_flags: /* (?i) */
- {
- U32 posflags = 0, negflags = 0;
- U32 *flagsp = &posflags;
-
- while (*RExC_parse) {
- /* && strchr("iogcmsx", *RExC_parse) */
- /* (?g), (?gc) and (?o) are useless here
- and must be globally applied -- japhy */
- switch (*RExC_parse) {
- CASE_STD_PMMOD_FLAGS_PARSE_SET(flagsp);
- case ONCE_PAT_MOD: /* 'o' */
- case GLOBAL_PAT_MOD: /* 'g' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- const I32 wflagbit = *RExC_parse == 'o' ? WASTED_O : WASTED_G;
- if (! (wastedflags & wflagbit) ) {
- wastedflags |= wflagbit;
- vWARN5(
- RExC_parse + 1,
- "Useless (%s%c) - %suse /%c modifier",
- flagsp == &negflags ? "?-" : "?",
- *RExC_parse,
- flagsp == &negflags ? "don't " : "",
- *RExC_parse
- );
- }
- }
- break;
-
- case CONTINUE_PAT_MOD: /* 'c' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- if (! (wastedflags & WASTED_C) ) {
- wastedflags |= WASTED_GC;
- vWARN3(
- RExC_parse + 1,
- "Useless (%sc) - %suse /gc modifier",
- flagsp == &negflags ? "?-" : "?",
- flagsp == &negflags ? "don't " : ""
- );
- }
- }
- break;
- case KEEPCOPY_PAT_MOD: /* 'p' */
- if (flagsp == &negflags) {
- if (SIZE_ONLY)
- ckWARNreg(RExC_parse + 1,"Useless use of (?-p)");
- } else {
- *flagsp |= RXf_PMf_KEEPCOPY;
- }
- break;
- case '-':
- if (flagsp == &negflags) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- flagsp = &negflags;
- wastedflags = 0; /* reset so (?g-c) warns twice */
- break;
- case ':':
- paren = ':';
- /*FALLTHROUGH*/
- case ')':
- RExC_flags |= posflags;
- RExC_flags &= ~negflags;
- if (paren != ':') {
- oregflags |= posflags;
- oregflags &= ~negflags;
- }
- nextchar(pRExC_state);
- if (paren != ':') {
- *flagp = TRYAGAIN;
- return NULL;
- } else {
- ret = NULL;
- goto parse_rest;
- }
- /*NOTREACHED*/
- default:
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- ++RExC_parse;
- }
- }} /* one for the default block, one for the switch */
- }
- else { /* (...) */
- capturing_parens:
- parno = RExC_npar;
- RExC_npar++;
-
- ret = reganode(pRExC_state, OPEN, parno);
- if (!SIZE_ONLY ){
- if (!RExC_nestroot)
- RExC_nestroot = parno;
- if (RExC_seen & REG_SEEN_RECURSE
- && !RExC_open_parens[parno-1])
- {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting open paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ret)));
- RExC_open_parens[parno-1]= ret;
- }
- }
- Set_Node_Length(ret, 1); /* MJD */
- Set_Node_Offset(ret, RExC_parse); /* MJD */
- is_open = 1;
- }
- }
- else /* ! paren */
- ret = NULL;
-
- parse_rest:
- /* Pick up the branches, linking them together. */
- parse_start = RExC_parse; /* MJD */
- br = regbranch(pRExC_state, &flags, 1,depth+1);
-
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
-
- /* branch_len = (paren != 0); */
-
- if (br == NULL)
- return(NULL);
- if (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, BRANCHJ, br, depth+1);
- }
- else { /* MJD */
- reginsert(pRExC_state, BRANCH, br, depth+1);
- Set_Node_Length(br, paren != 0);
- Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start);
- }
- have_branch = 1;
- if (SIZE_ONLY)
- RExC_extralen += 1; /* For BRANCHJ-BRANCH. */
- }
- else if (paren == ':') {
- *flagp |= flags&SIMPLE;
- }
- if (is_open) { /* Starts with OPEN. */
- REGTAIL(pRExC_state, ret, br); /* OPEN -> first. */
- }
- else if (paren != '?') /* Not Conditional */
- ret = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- lastbr = br;
- while (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- ender = reganode(pRExC_state, LONGJMP,0);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */
- }
- if (SIZE_ONLY)
- RExC_extralen += 2; /* Account for LONGJMP. */
- nextchar(pRExC_state);
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
- br = regbranch(pRExC_state, &flags, 0, depth+1);
-
- if (br == NULL)
- return(NULL);
- REGTAIL(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */
- lastbr = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- }
-
- if (have_branch || paren != ':') {
- /* Make a closing node, and hook it on the end. */
- switch (paren) {
- case ':':
- ender = reg_node(pRExC_state, TAIL);
- break;
- case 1:
- ender = reganode(pRExC_state, CLOSE, parno);
- if (!SIZE_ONLY && RExC_seen & REG_SEEN_RECURSE) {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting close paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ender)));
- RExC_close_parens[parno-1]= ender;
- if (RExC_nestroot == parno)
- RExC_nestroot = 0;
- }
- Set_Node_Offset(ender,RExC_parse+1); /* MJD */
- Set_Node_Length(ender,1); /* MJD */
- break;
- case '<':
- case ',':
- case '=':
- case '!':
- *flagp &= ~HASWIDTH;
- /* FALL THROUGH */
- case '>':
- ender = reg_node(pRExC_state, SUCCEED);
- break;
- case 0:
- ender = reg_node(pRExC_state, END);
- if (!SIZE_ONLY) {
- assert(!RExC_opend); /* there can only be one! */
- RExC_opend = ender;
- }
- break;
- }
- REGTAIL(pRExC_state, lastbr, ender);
-
- if (have_branch && !SIZE_ONLY) {
- if (depth==1)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
-
- /* Hook the tails of the branches to the closing node. */
- for (br = ret; br; br = regnext(br)) {
- const U8 op = PL_regkind[OP(br)];
- if (op == BRANCH) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(br), ender);
- }
- else if (op == BRANCHJ) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(NEXTOPER(br)), ender);
- }
- }
- }
- }
-
- {
- const char *p;
- static const char parens[] = "=!<,>";
-
- if (paren && (p = strchr(parens, paren))) {
- U8 node = ((p - parens) % 2) ? UNLESSM : IFMATCH;
- int flag = (p - parens) > 1;
-
- if (paren == '>')
- node = SUSPEND, flag = 0;
- reginsert(pRExC_state, node,ret, depth+1);
- Set_Node_Cur_Length(ret);
- Set_Node_Offset(ret, parse_start + 1);
- ret->flags = flag;
- REGTAIL_STUDY(pRExC_state, ret, reg_node(pRExC_state, TAIL));
- }
- }
-
- /* Check for proper termination. */
- if (paren) {
- RExC_flags = oregflags;
- if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched (");
- }
- }
- else if (!paren && RExC_parse < RExC_end) {
- if (*RExC_parse == ')') {
- RExC_parse++;
- vFAIL("Unmatched )");
- }
- else
- FAIL("Junk on end of regexp"); /* "Can't happen". */
- /* NOTREACHED */
- }
- if (after_freeze)
- RExC_npar = after_freeze;
- return(ret);
-}
-
-/*
- - regbranch - one alternative of an | operator
- *
- * Implements the concatenation operator.
- */
-STATIC regnode *
-S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register regnode *chain = NULL;
- register regnode *latest;
- I32 flags = 0, c = 0;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGBRANCH;
-
- DEBUG_PARSE("brnc");
-
- if (first)
- ret = NULL;
- else {
- if (!SIZE_ONLY && RExC_extralen)
- ret = reganode(pRExC_state, BRANCHJ,0);
- else {
- ret = reg_node(pRExC_state, BRANCH);
- Set_Node_Length(ret, 1);
- }
- }
-
- if (!first && SIZE_ONLY)
- RExC_extralen += 1; /* BRANCHJ */
-
- *flagp = WORST; /* Tentatively. */
-
- RExC_parse--;
- nextchar(pRExC_state);
- while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') {
- flags &= ~TRYAGAIN;
- latest = regpiece(pRExC_state, &flags,depth+1);
- if (latest == NULL) {
- if (flags & TRYAGAIN)
- continue;
- return(NULL);
- }
- else if (ret == NULL)
- ret = latest;
- *flagp |= flags&(HASWIDTH|POSTPONED);
- if (chain == NULL) /* First piece. */
- *flagp |= flags&SPSTART;
- else {
- RExC_naughty++;
- REGTAIL(pRExC_state, chain, latest);
- }
- chain = latest;
- c++;
- }
- if (chain == NULL) { /* Loop ran zero times. */
- chain = reg_node(pRExC_state, NOTHING);
- if (ret == NULL)
- ret = chain;
- }
- if (c == 1) {
- *flagp |= flags&SIMPLE;
- }
-
- return ret;
-}
-
-/*
- - regpiece - something followed by possible [*+?]
- *
- * Note that the branching code sequences used for ? and the general cases
- * of * and + are somewhat optimized: they use the same NOTHING node as
- * both the endmarker for their branch list and the body of the last branch.
- * It might seem that this node could be dispensed with entirely, but the
- * endmarker role is not redundant.
- */
-STATIC regnode *
-S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register char op;
- register char *next;
- I32 flags;
- const char * const origparse = RExC_parse;
- I32 min;
- I32 max = REG_INFTY;
- char *parse_start;
- const char *maxpos = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPIECE;
-
- DEBUG_PARSE("piec");
-
- ret = regatom(pRExC_state, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN)
- *flagp |= TRYAGAIN;
- return(NULL);
- }
-
- op = *RExC_parse;
-
- if (op == '{' && regcurly(RExC_parse)) {
- maxpos = NULL;
- parse_start = RExC_parse; /* MJD */
- next = RExC_parse + 1;
- while (isDIGIT(*next) || *next == ',') {
- if (*next == ',') {
- if (maxpos)
- break;
- else
- maxpos = next;
- }
- next++;
- }
- if (*next == '}') { /* got one */
- if (!maxpos)
- maxpos = next;
- RExC_parse++;
- min = atoi(RExC_parse);
- if (*maxpos == ',')
- maxpos++;
- else
- maxpos = RExC_parse;
- max = atoi(maxpos);
- if (!max && *maxpos != '0')
- max = REG_INFTY; /* meaning "infinity" */
- else if (max >= REG_INFTY)
- vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1);
- RExC_parse = next;
- nextchar(pRExC_state);
-
- do_curly:
- if ((flags&SIMPLE)) {
- RExC_naughty += 2 + RExC_naughty / 2;
- reginsert(pRExC_state, CURLY, ret, depth+1);
- Set_Node_Offset(ret, parse_start+1); /* MJD */
- Set_Node_Cur_Length(ret);
- }
- else {
- regnode * const w = reg_node(pRExC_state, WHILEM);
-
- w->flags = 0;
- REGTAIL(pRExC_state, ret, w);
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, LONGJMP,ret, depth+1);
- reginsert(pRExC_state, NOTHING,ret, depth+1);
- NEXT_OFF(ret) = 3; /* Go over LONGJMP. */
- }
- reginsert(pRExC_state, CURLYX,ret, depth+1);
- /* MJD hk */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Length(ret,
- op == '{' ? (RExC_parse - parse_start) : 1);
-
- if (!SIZE_ONLY && RExC_extralen)
- NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */
- REGTAIL(pRExC_state, ret, reg_node(pRExC_state, NOTHING));
- if (SIZE_ONLY)
- RExC_whilem_seen++, RExC_extralen += 3;
- RExC_naughty += 4 + RExC_naughty; /* compound interest */
- }
- ret->flags = 0;
-
- if (min > 0)
- *flagp = WORST;
- if (max > 0)
- *flagp |= HASWIDTH;
- if (max < min)
- vFAIL("Can't do {n,m} with n > m");
- if (!SIZE_ONLY) {
- ARG1_SET(ret, (U16)min);
- ARG2_SET(ret, (U16)max);
- }
-
- goto nest_check;
- }
- }
-
- if (!ISMULT1(op)) {
- *flagp = flags;
- return(ret);
- }
-
-#if 0 /* Now runtime fix should be reliable. */
-
- /* if this is reinstated, don't forget to put this back into perldiag:
-
- =item Regexp *+ operand could be empty at {#} in regex m/%s/
-
- (F) The part of the regexp subject to either the * or + quantifier
- could match an empty string. The {#} shows in the regular
- expression about where the problem was discovered.
-
- */
-
- if (!(flags&HASWIDTH) && op != '?')
- vFAIL("Regexp *+ operand could be empty");
-#endif
-
- parse_start = RExC_parse;
- nextchar(pRExC_state);
-
- *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH);
-
- if (op == '*' && (flags&SIMPLE)) {
- reginsert(pRExC_state, STAR, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 4;
- }
- else if (op == '*') {
- min = 0;
- goto do_curly;
- }
- else if (op == '+' && (flags&SIMPLE)) {
- reginsert(pRExC_state, PLUS, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 3;
- }
- else if (op == '+') {
- min = 1;
- goto do_curly;
- }
- else if (op == '?') {
- min = 0; max = 1;
- goto do_curly;
- }
- nest_check:
- if (!SIZE_ONLY && !(flags&(HASWIDTH|POSTPONED)) && max > REG_INFTY/3) {
- ckWARN3reg(RExC_parse,
- "%.*s matches null string many times",
- (int)(RExC_parse >= origparse ? RExC_parse - origparse : 0),
- origparse);
- }
-
- if (RExC_parse < RExC_end && *RExC_parse == '?') {
- nextchar(pRExC_state);
- reginsert(pRExC_state, MINMOD, ret, depth+1);
- REGTAIL(pRExC_state, ret, ret + NODE_STEP_REGNODE);
- }
-#ifndef REG_ALLOW_MINMOD_SUSPEND
- else
-#endif
- if (RExC_parse < RExC_end && *RExC_parse == '+') {
- regnode *ender;
- nextchar(pRExC_state);
- ender = reg_node(pRExC_state, SUCCEED);
- REGTAIL(pRExC_state, ret, ender);
- reginsert(pRExC_state, SUSPEND, ret, depth+1);
- ret->flags = 0;
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, ret, ender);
- /*ret= ender;*/
- }
-
- if (RExC_parse < RExC_end && ISMULT2(RExC_parse)) {
- RExC_parse++;
- vFAIL("Nested quantifiers");
- }
-
- return(ret);
-}
-
-
-/* reg_namedseq(pRExC_state,UVp)
-
- This is expected to be called by a parser routine that has
- recognized '\N' and needs to handle the rest. RExC_parse is
- expected to point at the first char following the N at the time
- of the call.
-
- If valuep is non-null then it is assumed that we are parsing inside
- of a charclass definition and the first codepoint in the resolved
- string is returned via *valuep and the routine will return NULL.
- In this mode if a multichar string is returned from the charnames
- handler a warning will be issued, and only the first char in the
- sequence will be examined. If the string returned is zero length
- then the value of *valuep is undefined and NON-NULL will
- be returned to indicate failure. (This will NOT be a valid pointer
- to a regnode.)
-
- If valuep is null then it is assumed that we are parsing normal text
- and inserts a new EXACT node into the program containing the resolved
- string and returns a pointer to the new node. If the string is
- zerolength a NOTHING node is emitted.
-
- On success RExC_parse is set to the char following the endbrace.
- Parsing failures will generate a fatal errorvia vFAIL(...)
-
- NOTE: We cache all results from the charnames handler locally in
- the RExC_charnames hash (created on first use) to prevent a charnames
- handler from playing silly-buggers and returning a short string and
- then a long string for a given pattern. Since the regexp program
- size is calculated during an initial parse this would result
- in a buffer overrun so we cache to prevent the charname result from
- changing during the course of the parse.
-
- */
-STATIC regnode *
-S_reg_namedseq(pTHX_ RExC_state_t *pRExC_state, UV *valuep, I32 *flagp)
-{
- char * name; /* start of the content of the name */
- char * endbrace; /* endbrace following the name */
- SV *sv_str = NULL;
- SV *sv_name = NULL;
- STRLEN len; /* this has various purposes throughout the code */
- bool cached = 0; /* if this is true then we shouldn't refcount dev sv_str */
- regnode *ret = NULL;
-
- PERL_ARGS_ASSERT_REG_NAMEDSEQ;
-
- if (*RExC_parse != '{' ||
- (*RExC_parse == '{' && RExC_parse[1]
- && strchr("0123456789", RExC_parse[1])))
- {
- GET_RE_DEBUG_FLAGS_DECL;
- if (valuep)
- /* no bare \N in a charclass */
- vFAIL("Missing braces on \\N{}");
- GET_RE_DEBUG_FLAGS;
- nextchar(pRExC_state);
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- RExC_parse--;
- Set_Node_Length(ret, 1); /* MJD */
- return ret;
- }
- name = RExC_parse+1;
- endbrace = strchr(RExC_parse, '}');
- if ( ! endbrace ) {
- RExC_parse++;
- vFAIL("Missing right brace on \\N{}");
- }
- RExC_parse = endbrace + 1;
-
-
- /* RExC_parse points at the beginning brace,
- endbrace points at the last */
- if ( name[0]=='U' && name[1]=='+' ) {
- /* its a "Unicode hex" notation {U+89AB} */
- I32 fl = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX
- | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0);
- UV cp;
- len = (STRLEN)(endbrace - name - 2);
- cp = grok_hex(name + 2, &len, &fl, NULL);
- if ( len != (STRLEN)(endbrace - name - 2) ) {
- cp = 0xFFFD;
- }
- if ( valuep ) {
- if (cp > 0xff) RExC_utf8 = 1;
- *valuep = cp;
- return NULL;
- }
-
- /* Need to convert to utf8 if either: won't fit into a byte, or the re
- * is going to be in utf8 and the representation changes under utf8. */
- if (cp > 0xff || (RExC_utf8 && ! UNI_IS_INVARIANT(cp))) {
- U8 string[UTF8_MAXBYTES+1];
- U8 *tmps;
- RExC_utf8 = 1;
- tmps = uvuni_to_utf8(string, cp);
- sv_str = newSVpvn_utf8((char*)string, tmps - string, TRUE);
- } else { /* Otherwise, no need for utf8, can skip that step */
- char string;
- string = (char)cp;
- sv_str= newSVpvn(&string, 1);
- }
- } else {
- /* fetch the charnames handler for this scope */
- HV * const table = GvHV(PL_hintgv);
- SV **cvp= table ?
- hv_fetchs(table, "charnames", FALSE) :
- NULL;
- SV *cv= cvp ? *cvp : NULL;
- HE *he_str;
- int count;
- /* create an SV with the name as argument */
- sv_name = newSVpvn(name, endbrace - name);
-
- if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
- vFAIL2("Constant(\\N{%" SVf "}) unknown: "
- "(possibly a missing \"use charnames ...\")",
- SVfARG(sv_name));
- }
- if (!cvp || !SvOK(*cvp)) { /* when $^H{charnames} = undef; */
- vFAIL2("Constant(\\N{%" SVf "}): "
- "$^H{charnames} is not defined", SVfARG(sv_name));
- }
-
-
-
- if (!RExC_charnames) {
- /* make sure our cache is allocated */
- RExC_charnames = newHV();
- sv_2mortal(MUTABLE_SV(RExC_charnames));
- }
- /* see if we have looked this one up before */
- he_str = hv_fetch_ent( RExC_charnames, sv_name, 0, 0 );
- if ( he_str ) {
- sv_str = HeVAL(he_str);
- cached = 1;
- } else {
- dSP ;
-
- ENTER ;
- SAVETMPS ;
- PUSHMARK(SP) ;
-
- XPUSHs(sv_name);
-
- PUTBACK ;
-
- count= call_sv(cv, G_SCALAR);
-
- if (count == 1) { /* XXXX is this right? dmq */
- sv_str = POPs;
- SvREFCNT_inc_simple_void(sv_str);
- }
-
- SPAGAIN ;
- PUTBACK ;
- FREETMPS ;
- LEAVE ;
-
- if ( !sv_str || !SvOK(sv_str) ) {
- vFAIL2("Constant(\\N{%" SVf "}): Call to &{$^H{charnames}} "
- "did not return a defined value", SVfARG(sv_name));
- }
- if (hv_store_ent( RExC_charnames, sv_name, sv_str, 0))
- cached = 1;
- }
- }
- if (valuep) {
- char *p = SvPV(sv_str, len);
- if (len) {
- STRLEN numlen = 1;
- if ( SvUTF8(sv_str) ) {
- *valuep = utf8_to_uvchr((U8*)p, &numlen);
- if (*valuep > 0x7F)
- RExC_utf8 = 1;
- /* XXXX
- We have to turn on utf8 for high bit chars otherwise
- we get failures with
-
- "ss" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
- "SS" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
-
- This is different from what \x{} would do with the same
- codepoint, where the condition is > 0xFF.
- - dmq
- */
-
-
- } else {
- *valuep = (UV)*p;
- /* warn if we havent used the whole string? */
- }
- if (numlen<len && SIZE_ONLY) {
- ckWARN2reg(RExC_parse,
- "Ignoring excess chars from \\N{%" SVf "} in character class",
- SVfARG(sv_name)
- );
- }
- } else if (SIZE_ONLY) {
- ckWARN2reg(RExC_parse,
- "Ignoring zero length \\N{%" SVf "} in character class",
- SVfARG(sv_name)
- );
- }
- if (sv_name)
- SvREFCNT_dec(sv_name);
- if (!cached)
- SvREFCNT_dec(sv_str);
- return len ? NULL : (regnode *)&len;
- } else if(SvCUR(sv_str)) {
-
- char *s;
- char *p, *pend;
- STRLEN charlen = 1;
-#ifdef DEBUGGING
- char * parse_start = name-3; /* needed for the offsets */
-#endif
- GET_RE_DEBUG_FLAGS_DECL; /* needed for the offsets */
-
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s= STRING(ret);
-
- if ( RExC_utf8 && !SvUTF8(sv_str) ) {
- sv_utf8_upgrade(sv_str);
- } else if ( !RExC_utf8 && SvUTF8(sv_str) ) {
- RExC_utf8= 1;
- }
-
- p = SvPV(sv_str, len);
- pend = p + len;
- /* len is the length written, charlen is the size the char read */
- for ( len = 0; p < pend; p += charlen ) {
- if (UTF) {
- UV uvc = utf8_to_uvchr((U8*)p, &charlen);
- if (FOLD) {
- STRLEN foldlen,numlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
- uvc = toFOLD_uni(uvc, tmpbuf, &foldlen);
- /* Emit all the Unicode characters. */
-
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen)
- {
- uvc = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- } else {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- } else {
- len++;
- REGC(*p, s++);
- }
- }
- if (SIZE_ONLY) {
- RExC_size += STR_SZ(len);
- } else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- } else { /* zero length */
- ret = reg_node(pRExC_state,NOTHING);
- }
- if (!cached) {
- SvREFCNT_dec(sv_str);
- }
- if (sv_name) {
- SvREFCNT_dec(sv_name);
- }
- return ret;
-
-}
-
-
-/*
- * reg_recode
- *
- * It returns the code point in utf8 for the value in *encp.
- * value: a code value in the source encoding
- * encp: a pointer to an Encode object
- *
- * If the result from Encode is not a single character,
- * it returns U+FFFD (Replacement character) and sets *encp to NULL.
- */
-STATIC UV
-S_reg_recode(pTHX_ const char value, SV **encp)
-{
- STRLEN numlen = 1;
- SV * const sv = newSVpvn_flags(&value, numlen, SVs_TEMP);
- const char * const s = *encp ? sv_recode_to_utf8(sv, *encp) : SvPVX(sv);
- const STRLEN newlen = SvCUR(sv);
- UV uv = UNICODE_REPLACEMENT;
-
- PERL_ARGS_ASSERT_REG_RECODE;
-
- if (newlen)
- uv = SvUTF8(sv)
- ? utf8n_to_uvchr((U8*)s, newlen, &numlen, UTF8_ALLOW_DEFAULT)
- : *(U8*)s;
-
- if (!newlen || numlen != newlen) {
- uv = UNICODE_REPLACEMENT;
- *encp = NULL;
- }
- return uv;
-}
-
-
-/*
- - regatom - the lowest level
-
- Try to identify anything special at the start of the pattern. If there
- is, then handle it as required. This may involve generating a single regop,
- such as for an assertion; or it may involve recursing, such as to
- handle a () structure.
-
- If the string doesn't start with something special then we gobble up
- as much literal text as we can.
-
- Once we have been able to handle whatever type of thing started the
- sequence, we return.
-
- Note: we have to be careful with escapes, as they can be both literal
- and special, and in the case of \10 and friends can either, depending
- on context. Specifically there are two seperate switches for handling
- escape sequences, with the one for handling literal escapes requiring
- a dummy entry for all of the special escapes that are actually handled
- by the other.
-*/
-
-STATIC regnode *
-S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret = NULL;
- I32 flags;
- char *parse_start = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_PARSE("atom");
- *flagp = WORST; /* Tentatively. */
-
- PERL_ARGS_ASSERT_REGATOM;
-
-tryagain:
- switch ((U8)*RExC_parse) {
- case '^':
- RExC_seen_zerolen++;
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MBOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SBOL);
- else
- ret = reg_node(pRExC_state, BOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '$':
- nextchar(pRExC_state);
- if (*RExC_parse)
- RExC_seen_zerolen++;
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MEOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SEOL);
- else
- ret = reg_node(pRExC_state, EOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '.':
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SANY);
- else
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '[':
- {
- char * const oregcomp_parse = ++RExC_parse;
- ret = regclass(pRExC_state,depth+1);
- if (*RExC_parse != ']') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched [");
- }
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */
- break;
- }
- case '(':
- nextchar(pRExC_state);
- ret = reg(pRExC_state, 1, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN) {
- if (RExC_parse == RExC_end) {
- /* Make parent create an empty node if needed. */
- *flagp |= TRYAGAIN;
- return(NULL);
- }
- goto tryagain;
- }
- return(NULL);
- }
- *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE|POSTPONED);
- break;
- case '|':
- case ')':
- if (flags & TRYAGAIN) {
- *flagp |= TRYAGAIN;
- return NULL;
- }
- vFAIL("Internal urp");
- /* Supposed to be caught earlier. */
- break;
- case '{':
- if (!regcurly(RExC_parse)) {
- RExC_parse++;
- goto defchar;
- }
- /* FALL THROUGH */
- case '?':
- case '+':
- case '*':
- RExC_parse++;
- vFAIL("Quantifier follows nothing");
- break;
- case 0xDF:
- case 0xC3:
- case 0xCE:
- do_foldchar:
- if (!LOC && FOLD) {
- U32 len,cp;
- len=0; /* silence a spurious compiler warning */
- if ((cp = what_len_TRICKYFOLD_safe(RExC_parse,RExC_end,UTF,len))) {
- *flagp |= HASWIDTH; /* could be SIMPLE too, but needs a handler in regexec.regrepeat */
- RExC_parse+=len-1; /* we get one from nextchar() as well. :-( */
- ret = reganode(pRExC_state, FOLDCHAR, cp);
- Set_Node_Length(ret, 1); /* MJD */
- nextchar(pRExC_state); /* kill whitespace under /x */
- return ret;
- }
- }
- goto outer_default;
- case '\\':
- /* Special Escapes
-
- This switch handles escape sequences that resolve to some kind
- of special regop and not to literal text. Escape sequnces that
- resolve to literal text are handled below in the switch marked
- "Literal Escapes".
-
- Every entry in this switch *must* have a corresponding entry
- in the literal escape switch. However, the opposite is not
- required, as the default for this switch is to jump to the
- literal text handling code.
- */
- switch ((U8)*++RExC_parse) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- goto do_foldchar;
- /* Special Escapes */
- case 'A':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, SBOL);
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'G':
- ret = reg_node(pRExC_state, GPOS);
- RExC_seen |= REG_SEEN_GPOS;
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'K':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, KEEPS);
- *flagp |= SIMPLE;
- /* XXX:dmq : disabling in-place substitution seems to
- * be necessary here to avoid cases of memory corruption, as
- * with: C<$_="x" x 80; s/x\K/y/> -- rgs
- */
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- goto finish_meta_pat;
- case 'Z':
- ret = reg_node(pRExC_state, SEOL);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'z':
- ret = reg_node(pRExC_state, EOS);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'C':
- ret = reg_node(pRExC_state, CANY);
- RExC_seen |= REG_SEEN_CANY;
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'X':
- ret = reg_node(pRExC_state, CLUMP);
- *flagp |= HASWIDTH;
- goto finish_meta_pat;
- case 'w':
- ret = reg_node(pRExC_state, (U8)(LOC ? ALNUML : ALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'W':
- ret = reg_node(pRExC_state, (U8)(LOC ? NALNUML : NALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'b':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? BOUNDL : BOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'B':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? NBOUNDL : NBOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 's':
- ret = reg_node(pRExC_state, (U8)(LOC ? SPACEL : SPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'S':
- ret = reg_node(pRExC_state, (U8)(LOC ? NSPACEL : NSPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'd':
- ret = reg_node(pRExC_state, DIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'D':
- ret = reg_node(pRExC_state, NDIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'R':
- ret = reg_node(pRExC_state, LNBREAK);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'h':
- ret = reg_node(pRExC_state, HORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'H':
- ret = reg_node(pRExC_state, NHORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'v':
- ret = reg_node(pRExC_state, VERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'V':
- ret = reg_node(pRExC_state, NVERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- finish_meta_pat:
- nextchar(pRExC_state);
- Set_Node_Length(ret, 2); /* MJD */
- break;
- case 'p':
- case 'P':
- {
- char* const oldregxend = RExC_end;
-#ifdef DEBUGGING
- char* parse_start = RExC_parse - 2;
-#endif
-
- if (RExC_parse[1] == '{') {
- /* a lovely hack--pretend we saw [\pX] instead */
- RExC_end = strchr(RExC_parse, '}');
- if (!RExC_end) {
- const U8 c = (U8)*RExC_parse;
- RExC_parse += 2;
- RExC_end = oldregxend;
- vFAIL2("Missing right brace on \\%c{}", c);
- }
- RExC_end++;
- }
- else {
- RExC_end = RExC_parse + 2;
- if (RExC_end > oldregxend)
- RExC_end = oldregxend;
- }
- RExC_parse--;
-
- ret = regclass(pRExC_state,depth+1);
-
- RExC_end = oldregxend;
- RExC_parse--;
-
- Set_Node_Offset(ret, parse_start + 2);
- Set_Node_Cur_Length(ret);
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- }
- break;
- case 'N':
- /* Handle \N and \N{NAME} here and not below because it can be
- multicharacter. join_exact() will join them up later on.
- Also this makes sure that things like /\N{BLAH}+/ and
- \N{BLAH} being multi char Just Happen. dmq*/
- ++RExC_parse;
- ret= reg_namedseq(pRExC_state, NULL, flagp);
- break;
- case 'k': /* Handle \k<NAME> and \k'NAME' */
- parse_named_seq:
- {
- char ch= RExC_parse[1];
- if (ch != '<' && ch != '\'' && ch != '{') {
- RExC_parse++;
- vFAIL2("Sequence %.2s... not terminated",parse_start);
- } else {
- /* this pretty much dupes the code for (?P=...) in reg(), if
- you change this make sure you change that */
- char* name_start = (RExC_parse += 2);
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- ch= (ch == '<') ? '>' : (ch == '{') ? '}' : '\'';
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
-
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
-
- }
- break;
- }
- case 'g':
- case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 num;
- bool isg = *RExC_parse == 'g';
- bool isrel = 0;
- bool hasbrace = 0;
- if (isg) {
- RExC_parse++;
- if (*RExC_parse == '{') {
- RExC_parse++;
- hasbrace = 1;
- }
- if (*RExC_parse == '-') {
- RExC_parse++;
- isrel = 1;
- }
- if (hasbrace && !isDIGIT(*RExC_parse)) {
- if (isrel) RExC_parse--;
- RExC_parse -= 2;
- goto parse_named_seq;
- } }
- num = atoi(RExC_parse);
- if (isg && num == 0)
- vFAIL("Reference to invalid group 0");
- if (isrel) {
- num = RExC_npar - num;
- if (num < 1)
- vFAIL("Reference to nonexistent or unclosed group");
- }
- if (!isg && num > 9 && num >= RExC_npar)
- goto defchar;
- else {
- char * const parse_start = RExC_parse - 1; /* MJD */
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (parse_start == RExC_parse - 1)
- vFAIL("Unterminated \\g... pattern");
- if (hasbrace) {
- if (*RExC_parse != '}')
- vFAIL("Unterminated \\g{...} pattern");
- RExC_parse++;
- }
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens)
- vFAIL("Reference to nonexistent group");
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? REFFL : REFF) : REF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- }
- }
- break;
- case '\0':
- if (RExC_parse >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- /* Do not generate "unrecognized" warnings here, we fall
- back into the quick-grab loop below */
- parse_start--;
- goto defchar;
- }
- break;
-
- case '#':
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if ( reg_skipcomment( pRExC_state ) )
- goto tryagain;
- }
- /* FALL THROUGH */
-
- default:
- outer_default:{
- register STRLEN len;
- register UV ender;
- register char *p;
- char *s;
- STRLEN foldlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
-
- parse_start = RExC_parse - 1;
-
- RExC_parse++;
-
- defchar:
- ender = 0;
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s = STRING(ret);
- for (len = 0, p = RExC_parse - 1;
- len < 127 && p < RExC_end;
- len++)
- {
- char * const oldp = p;
-
- if (RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- switch ((U8)*p) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case '^':
- case '$':
- case '.':
- case '[':
- case '(':
- case ')':
- case '|':
- goto loopdone;
- case '\\':
- /* Literal Escapes Switch
-
- This switch is meant to handle escape sequences that
- resolve to a literal character.
-
- Every escape sequence that represents something
- else, like an assertion or a char class, is handled
- in the switch marked 'Special Escapes' above in this
- routine, but also has an entry here as anything that
- isn't explicitly mentioned here will be treated as
- an unescaped equivalent literal.
- */
-
- switch ((U8)*++p) {
- /* These are all the special escapes. */
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case 'A': /* Start assertion */
- case 'b': case 'B': /* Word-boundary assertion*/
- case 'C': /* Single char !DANGEROUS! */
- case 'd': case 'D': /* digit class */
- case 'g': case 'G': /* generic-backref, pos assertion */
- case 'h': case 'H': /* HORIZWS */
- case 'k': case 'K': /* named backref, keep marker */
- case 'N': /* named char sequence */
- case 'p': case 'P': /* Unicode property */
- case 'R': /* LNBREAK */
- case 's': case 'S': /* space class */
- case 'v': case 'V': /* VERTWS */
- case 'w': case 'W': /* word class */
- case 'X': /* eXtended Unicode "combining character sequence" */
- case 'z': case 'Z': /* End of line/string assertion */
- --p;
- goto loopdone;
-
- /* Anything after here is an escape that resolves to a
- literal. (Except digits, which may or may not)
- */
- case 'n':
- ender = '\n';
- p++;
- break;
- case 'r':
- ender = '\r';
- p++;
- break;
- case 't':
- ender = '\t';
- p++;
- break;
- case 'f':
- ender = '\f';
- p++;
- break;
- case 'e':
- ender = ASCII_TO_NATIVE('\033');
- p++;
- break;
- case 'a':
- ender = ASCII_TO_NATIVE('\007');
- p++;
- break;
- case 'x':
- if (*++p == '{') {
- char* const e = strchr(p, '}');
-
- if (!e) {
- RExC_parse = p + 1;
- vFAIL("Missing right brace on \\x{}");
- }
- else {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = e - p - 1;
- ender = grok_hex(p + 1, &numlen, &flags, NULL);
- if (ender > 0xff)
- RExC_utf8 = 1;
- p = e + 1;
- }
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = 2;
- ender = grok_hex(p, &numlen, &flags, NULL);
- p += numlen;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- p++;
- ender = UCHARAT(p++);
- ender = toCTRL(ender);
- break;
- case '0': case '1': case '2': case '3':case '4':
- case '5': case '6': case '7': case '8':case '9':
- if (*p == '0' ||
- (isDIGIT(p[1]) && atoi(p) >= RExC_npar) ) {
- I32 flags = 0;
- STRLEN numlen = 3;
- ender = grok_oct(p, &numlen, &flags, NULL);
-
- /* An octal above 0xff is interpreted differently
- * depending on if the re is in utf8 or not. If it
- * is in utf8, the value will be itself, otherwise
- * it is interpreted as modulo 0x100. It has been
- * decided to discourage the use of octal above the
- * single-byte range. For now, warn only when
- * it ends up modulo */
- if (SIZE_ONLY && ender >= 0x100
- && ! UTF && ! PL_encoding) {
- ckWARNregdep(p, "Use of octal value above 377 is deprecated");
- }
- p += numlen;
- }
- else {
- --p;
- goto loopdone;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- recode_encoding:
- {
- SV* enc = PL_encoding;
- ender = reg_recode((const char)(U8)ender, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(p, "Invalid escape in the specified encoding");
- RExC_utf8 = 1;
- }
- break;
- case '\0':
- if (p >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- if (!SIZE_ONLY&& isALPHA(*p))
- ckWARN2reg(p + 1, "Unrecognized escape \\%c passed through", UCHARAT(p));
- goto normal_default;
- }
- break;
- default:
- normal_default:
- if (UTF8_IS_START(*p) && UTF) {
- STRLEN numlen;
- ender = utf8n_to_uvchr((U8*)p, RExC_end - p,
- &numlen, UTF8_ALLOW_DEFAULT);
- p += numlen;
- }
- else
- ender = *p++;
- break;
- }
- if ( RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- if (UTF && FOLD) {
- /* Prime the casefolded buffer. */
- ender = toFOLD_uni(ender, tmpbuf, &foldlen);
- }
- if (p < RExC_end && ISMULT2(p)) { /* Back off on ?+*. */
- if (len)
- p = oldp;
- else if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- }
- else {
- len++;
- REGC((char)ender, s++);
- }
- break;
- }
- if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- len += unilen;
- s += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break;
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- len--;
- }
- else
- REGC((char)ender, s++);
- }
- loopdone:
- RExC_parse = p - 1;
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
- {
- /* len is STRLEN which is unsigned, need to copy to signed */
- IV iv = len;
- if (iv < 0)
- vFAIL("Internal disaster");
- }
- if (len > 0)
- *flagp |= HASWIDTH;
- if (len == 1 && UNI_IS_INVARIANT(ender))
- *flagp |= SIMPLE;
-
- if (SIZE_ONLY)
- RExC_size += STR_SZ(len);
- else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- }
- break;
- }
-
- return(ret);
-}
-
-STATIC char *
-S_regwhite( RExC_state_t *pRExC_state, char *p )
-{
- const char *e = RExC_end;
-
- PERL_ARGS_ASSERT_REGWHITE;
-
- while (p < e) {
- if (isSPACE(*p))
- ++p;
- else if (*p == '#') {
- bool ended = 0;
- do {
- if (*p++ == '\n') {
- ended = 1;
- break;
- }
- } while (p < e);
- if (!ended)
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- }
- else
- break;
- }
- return p;
-}
-
-/* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]].
- Character classes ([:foo:]) can also be negated ([:^foo:]).
- Returns a named class id (ANYOF_XXX) if successful, -1 otherwise.
- Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed,
- but trigger failures because they are currently unimplemented. */
-
-#define POSIXCC_DONE(c) ((c) == ':')
-#define POSIXCC_NOTYET(c) ((c) == '=' || (c) == '.')
-#define POSIXCC(c) (POSIXCC_DONE(c) || POSIXCC_NOTYET(c))
-
-STATIC I32
-S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value)
-{
- dVAR;
- I32 namedclass = OOB_NAMEDCLASS;
-
- PERL_ARGS_ASSERT_REGPPOSIXCC;
-
- if (value == '[' && RExC_parse + 1 < RExC_end &&
- /* I smell either [: or [= or [. -- POSIX has been here, right? */
- POSIXCC(UCHARAT(RExC_parse))) {
- const char c = UCHARAT(RExC_parse);
- char* const s = RExC_parse++;
-
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != c)
- RExC_parse++;
- if (RExC_parse == RExC_end)
- /* Grandfather lone [:, [=, [. */
- RExC_parse = s;
- else {
- const char* const t = RExC_parse++; /* skip over the c */
- assert(*t == c);
-
- if (UCHARAT(RExC_parse) == ']') {
- const char *posixcc = s + 1;
- RExC_parse++; /* skip over the ending ] */
-
- if (*s == ':') {
- const I32 complement = *posixcc == '^' ? *posixcc++ : 0;
- const I32 skip = t - posixcc;
-
- /* Initially switch on the length of the name. */
- switch (skip) {
- case 4:
- if (memEQ(posixcc, "word", 4)) /* this is not POSIX, this is the Perl \w */
- namedclass = complement ? ANYOF_NALNUM : ANYOF_ALNUM;
- break;
- case 5:
- /* Names all of length 5. */
- /* alnum alpha ascii blank cntrl digit graph lower
- print punct space upper */
- /* Offset 4 gives the best switch position. */
- switch (posixcc[4]) {
- case 'a':
- if (memEQ(posixcc, "alph", 4)) /* alpha */
- namedclass = complement ? ANYOF_NALPHA : ANYOF_ALPHA;
- break;
- case 'e':
- if (memEQ(posixcc, "spac", 4)) /* space */
- namedclass = complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC;
- break;
- case 'h':
- if (memEQ(posixcc, "grap", 4)) /* graph */
- namedclass = complement ? ANYOF_NGRAPH : ANYOF_GRAPH;
- break;
- case 'i':
- if (memEQ(posixcc, "asci", 4)) /* ascii */
- namedclass = complement ? ANYOF_NASCII : ANYOF_ASCII;
- break;
- case 'k':
- if (memEQ(posixcc, "blan", 4)) /* blank */
- namedclass = complement ? ANYOF_NBLANK : ANYOF_BLANK;
- break;
- case 'l':
- if (memEQ(posixcc, "cntr", 4)) /* cntrl */
- namedclass = complement ? ANYOF_NCNTRL : ANYOF_CNTRL;
- break;
- case 'm':
- if (memEQ(posixcc, "alnu", 4)) /* alnum */
- namedclass = complement ? ANYOF_NALNUMC : ANYOF_ALNUMC;
- break;
- case 'r':
- if (memEQ(posixcc, "lowe", 4)) /* lower */
- namedclass = complement ? ANYOF_NLOWER : ANYOF_LOWER;
- else if (memEQ(posixcc, "uppe", 4)) /* upper */
- namedclass = complement ? ANYOF_NUPPER : ANYOF_UPPER;
- break;
- case 't':
- if (memEQ(posixcc, "digi", 4)) /* digit */
- namedclass = complement ? ANYOF_NDIGIT : ANYOF_DIGIT;
- else if (memEQ(posixcc, "prin", 4)) /* print */
- namedclass = complement ? ANYOF_NPRINT : ANYOF_PRINT;
- else if (memEQ(posixcc, "punc", 4)) /* punct */
- namedclass = complement ? ANYOF_NPUNCT : ANYOF_PUNCT;
- break;
- }
- break;
- case 6:
- if (memEQ(posixcc, "xdigit", 6))
- namedclass = complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT;
- break;
- }
-
- if (namedclass == OOB_NAMEDCLASS)
- Simple_vFAIL3("POSIX class [:%.*s:] unknown",
- t - s - 1, s + 1);
- assert (posixcc[skip] == ':');
- assert (posixcc[skip+1] == ']');
- } else if (!SIZE_ONLY) {
- /* [[=foo=]] and [[.foo.]] are still future. */
-
- /* adjust RExC_parse so the warning shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse) != ']')
- RExC_parse++;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- } else {
- /* Maternal grandfather:
- * "[:" ending in ":" but not in ":]" */
- RExC_parse = s;
- }
- }
- }
-
- return namedclass;
-}
-
-STATIC void
-S_checkposixcc(pTHX_ RExC_state_t *pRExC_state)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_CHECKPOSIXCC;
-
- if (POSIXCC(UCHARAT(RExC_parse))) {
- const char *s = RExC_parse;
- const char c = *s++;
-
- while (isALNUM(*s))
- s++;
- if (*s && c == *s && s[1] == ']') {
- ckWARN3reg(s+2,
- "POSIX syntax [%c %c] belongs inside character classes",
- c, c);
-
- /* [[=foo=]] and [[.foo.]] are still future. */
- if (POSIXCC_NOTYET(c)) {
- /* adjust RExC_parse so the error shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse++) != ']')
- NOOP;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- }
- }
-}
-
-
-#define _C_C_T_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_N##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '!'; \
- what = WORD; \
- break
-
-#define _C_C_T_NOLOC_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '!'; \
- what = WORD; \
- break
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define POSIX_CC_UNI_NAME(CCNAME) CCNAME
-#else
-#define POSIX_CC_UNI_NAME(CCNAME) "Posix" CCNAME
-#endif
-
-/*
- parse a class specification and produce either an ANYOF node that
- matches the pattern or if the pattern matches a single char only and
- that char is < 256 and we are case insensitive then we produce an
- EXACT node instead.
-*/
-
-STATIC regnode *
-S_regclass(pTHX_ RExC_state_t *pRExC_state, U32 depth)
-{
- dVAR;
- register UV nextvalue;
- register IV prevvalue = OOB_UNICODE;
- register IV range = 0;
- UV value = 0; /* XXX:dmq: needs to be referenceable (unfortunately) */
- register regnode *ret;
- STRLEN numlen;
- IV namedclass;
- char *rangebegin = NULL;
- bool need_class = 0;
- SV *listsv = NULL;
- UV n;
- bool optimize_invert = TRUE;
- AV* unicode_alternate = NULL;
-#ifdef EBCDIC
- UV literal_endpoint = 0;
-#endif
- UV stored = 0; /* number of chars stored in the class */
-
- regnode * const orig_emit = RExC_emit; /* Save the original RExC_emit in
- case we need to change the emitted regop to an EXACT. */
- const char * orig_parse = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCLASS;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- DEBUG_PARSE("clas");
-
- /* Assume we are going to generate an ANYOF node. */
- ret = reganode(pRExC_state, ANYOF, 0);
-
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) = 0;
-
- if (UCHARAT(RExC_parse) == '^') { /* Complement of range. */
- RExC_naughty++;
- RExC_parse++;
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) |= ANYOF_INVERT;
- }
-
- if (SIZE_ONLY) {
- RExC_size += ANYOF_SKIP;
- listsv = &PL_sv_undef; /* For code scanners: listsv always non-NULL. */
- }
- else {
- RExC_emit += ANYOF_SKIP;
- if (FOLD)
- ANYOF_FLAGS(ret) |= ANYOF_FOLD;
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_LOCALE;
- ANYOF_BITMAP_ZERO(ret);
- listsv = newSVpvs("# comment\n");
- }
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
-
- if (!SIZE_ONLY && POSIXCC(nextvalue))
- checkposixcc(pRExC_state);
-
- /* allow 1st char to be ] (allowing it to be - is dealt with later) */
- if (UCHARAT(RExC_parse) == ']')
- goto charclassloop;
-
-parseit:
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != ']') {
-
- charclassloop:
-
- namedclass = OOB_NAMEDCLASS; /* initialize as illegal */
-
- if (!range)
- rangebegin = RExC_parse;
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
- if (value == '[' && POSIXCC(nextvalue))
- namedclass = regpposixcc(pRExC_state, value);
- else if (value == '\\') {
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
- /* Some compilers cannot handle switching on 64-bit integer
- * values, therefore value cannot be an UV. Yes, this will
- * be a problem later if we want switch on Unicode.
- * A similar issue a little bit later when switching on
- * namedclass. --jhi */
- switch ((I32)value) {
- case 'w': namedclass = ANYOF_ALNUM; break;
- case 'W': namedclass = ANYOF_NALNUM; break;
- case 's': namedclass = ANYOF_SPACE; break;
- case 'S': namedclass = ANYOF_NSPACE; break;
- case 'd': namedclass = ANYOF_DIGIT; break;
- case 'D': namedclass = ANYOF_NDIGIT; break;
- case 'v': namedclass = ANYOF_VERTWS; break;
- case 'V': namedclass = ANYOF_NVERTWS; break;
- case 'h': namedclass = ANYOF_HORIZWS; break;
- case 'H': namedclass = ANYOF_NHORIZWS; break;
- case 'N': /* Handle \N{NAME} in class */
- {
- /* We only pay attention to the first char of
- multichar strings being returned. I kinda wonder
- if this makes sense as it does change the behaviour
- from earlier versions, OTOH that behaviour was broken
- as well. */
- UV v; /* value is register so we cant & it /grrr */
- if (reg_namedseq(pRExC_state, &v, NULL)) {
- goto parseit;
- }
- value= v;
- }
- break;
- case 'p':
- case 'P':
- {
- char *e;
- if (RExC_parse >= RExC_end)
- vFAIL2("Empty \\%c{}", (U8)value);
- if (*RExC_parse == '{') {
- const U8 c = (U8)value;
- e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL2("Missing right brace on \\%c{}", c);
- while (isSPACE(UCHARAT(RExC_parse)))
- RExC_parse++;
- if (e == RExC_parse)
- vFAIL2("Empty \\%c{}", c);
- n = e - RExC_parse;
- while (isSPACE(UCHARAT(RExC_parse + n - 1)))
- n--;
- }
- else {
- e = RExC_parse;
- n = 1;
- }
- if (!SIZE_ONLY) {
- if (UCHARAT(RExC_parse) == '^') {
- RExC_parse++;
- n--;
- value = value == 'p' ? 'P' : 'p'; /* toggle */
- while (isSPACE(UCHARAT(RExC_parse))) {
- RExC_parse++;
- n--;
- }
- }
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::%.*s\n",
- (value=='p' ? '+' : '!'), (int)n, RExC_parse);
- }
- RExC_parse = e + 1;
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- namedclass = ANYOF_MAX; /* no official name, but it's named */
- }
- break;
- case 'n': value = '\n'; break;
- case 'r': value = '\r'; break;
- case 't': value = '\t'; break;
- case 'f': value = '\f'; break;
- case 'b': value = '\b'; break;
- case 'e': value = ASCII_TO_NATIVE('\033');break;
- case 'a': value = ASCII_TO_NATIVE('\007');break;
- case 'x':
- if (*RExC_parse == '{') {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- char * const e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL("Missing right brace on \\x{}");
-
- numlen = e - RExC_parse;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse = e + 1;
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- numlen = 2;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- }
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- value = UCHARAT(RExC_parse++);
- value = toCTRL(value);
- break;
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 flags = 0;
- numlen = 3;
- value = grok_oct(--RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- }
- recode_encoding:
- {
- SV* enc = PL_encoding;
- value = reg_recode((const char)(U8)value, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(RExC_parse,
- "Invalid escape in the specified encoding");
- break;
- }
- default:
- if (!SIZE_ONLY && isALPHA(value))
- ckWARN2reg(RExC_parse,
- "Unrecognized escape \\%c in character class passed through",
- (int)value);
- break;
- }
- } /* end of \blah */
-#ifdef EBCDIC
- else
- literal_endpoint++;
-#endif
-
- if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */
-
- if (!SIZE_ONLY && !need_class)
- ANYOF_CLASS_ZERO(ret);
-
- need_class = 1;
-
- /* a bad range like a-\d, a-[:digit:] ? */
- if (range) {
- if (!SIZE_ONLY) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- ckWARN4reg(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
-
- if (prevvalue < 256) {
- ANYOF_BITMAP_SET(ret, prevvalue);
- ANYOF_BITMAP_SET(ret, '-');
- }
- else {
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-');
- }
- }
-
- range = 0; /* this was not a true range */
- }
-
-
-
- if (!SIZE_ONLY) {
- const char *what = NULL;
- char yesno = 0;
-
- if (namedclass > OOB_NAMEDCLASS)
- optimize_invert = FALSE;
- /* Possible truncation here but in some 64-bit environments
- * the compiler gets heartburn about switch on 64-bit values.
- * A similar issue a little earlier when switching on value.
- * --jhi */
- switch ((I32)namedclass) {
-
- case _C_C_T_(ALNUMC, isALNUMC(value), POSIX_CC_UNI_NAME("Alnum"));
- case _C_C_T_(ALPHA, isALPHA(value), POSIX_CC_UNI_NAME("Alpha"));
- case _C_C_T_(BLANK, isBLANK(value), POSIX_CC_UNI_NAME("Blank"));
- case _C_C_T_(CNTRL, isCNTRL(value), POSIX_CC_UNI_NAME("Cntrl"));
- case _C_C_T_(GRAPH, isGRAPH(value), POSIX_CC_UNI_NAME("Graph"));
- case _C_C_T_(LOWER, isLOWER(value), POSIX_CC_UNI_NAME("Lower"));
- case _C_C_T_(PRINT, isPRINT(value), POSIX_CC_UNI_NAME("Print"));
- case _C_C_T_(PSXSPC, isPSXSPC(value), POSIX_CC_UNI_NAME("Space"));
- case _C_C_T_(PUNCT, isPUNCT(value), POSIX_CC_UNI_NAME("Punct"));
- case _C_C_T_(UPPER, isUPPER(value), POSIX_CC_UNI_NAME("Upper"));
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
- case _C_C_T_(ALNUM, isALNUM(value), "Word");
- case _C_C_T_(SPACE, isSPACE(value), "SpacePerl");
-#else
- case _C_C_T_(SPACE, isSPACE(value), "PerlSpace");
- case _C_C_T_(ALNUM, isALNUM(value), "PerlWord");
-#endif
- case _C_C_T_(XDIGIT, isXDIGIT(value), "XDigit");
- case _C_C_T_NOLOC_(VERTWS, is_VERTWS_latin1(&value), "VertSpace");
- case _C_C_T_NOLOC_(HORIZWS, is_HORIZWS_latin1(&value), "HorizSpace");
- case ANYOF_ASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_ASCII);
- else {
-#ifndef EBCDIC
- for (value = 0; value < 128; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '+';
- what = "ASCII";
- break;
- case ANYOF_NASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NASCII);
- else {
-#ifndef EBCDIC
- for (value = 128; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (!isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '!';
- what = "ASCII";
- break;
- case ANYOF_DIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_DIGIT);
- else {
- /* consecutive digits assumed */
- for (value = '0'; value <= '9'; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '+';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_NDIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NDIGIT);
- else {
- /* consecutive digits assumed */
- for (value = 0; value < '0'; value++)
- ANYOF_BITMAP_SET(ret, value);
- for (value = '9' + 1; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '!';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_MAX:
- /* this is to handle \p and \P */
- break;
- default:
- vFAIL("Invalid [::] class");
- break;
- }
- if (what) {
- /* Strings such as "+utf8::isWord\n" */
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::Is%s\n", yesno, what);
- }
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_CLASS;
- continue;
- }
- } /* end of namedclass \blah */
-
- if (range) {
- if (prevvalue > (IV)value) /* b-a */ {
- const int w = RExC_parse - rangebegin;
- Simple_vFAIL4("Invalid [] range \"%*.*s\"", w, w, rangebegin);
- range = 0; /* not a valid range */
- }
- }
- else {
- prevvalue = value; /* save the beginning of the range */
- if (*RExC_parse == '-' && RExC_parse+1 < RExC_end &&
- RExC_parse[1] != ']') {
- RExC_parse++;
-
- /* a bad range like \w-, [:word:]- ? */
- if (namedclass > OOB_NAMEDCLASS) {
- if (ckWARN(WARN_REGEXP)) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- vWARN4(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
- }
- if (!SIZE_ONLY)
- ANYOF_BITMAP_SET(ret, '-');
- } else
- range = 1; /* yeah, it's a range! */
- continue; /* but do it the next time */
- }
- }
-
- /* now is the next time */
- /*stored += (value - prevvalue + 1);*/
- if (!SIZE_ONLY) {
- if (prevvalue < 256) {
- const IV ceilvalue = value < 256 ? value : 255;
- IV i;
-#ifdef EBCDIC
- /* In EBCDIC [\x89-\x91] should include
- * the \x8e but [i-j] should not. */
- if (literal_endpoint == 2 &&
- ((isLOWER(prevvalue) && isLOWER(ceilvalue)) ||
- (isUPPER(prevvalue) && isUPPER(ceilvalue))))
- {
- if (isLOWER(prevvalue)) {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isLOWER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- } else {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isUPPER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- else
-#endif
- for (i = prevvalue; i <= ceilvalue; i++) {
- if (!ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- if (value > 255 || UTF) {
- const UV prevnatvalue = NATIVE_TO_UNI(prevvalue);
- const UV natvalue = NATIVE_TO_UNI(value);
- stored+=2; /* can't optimize this class */
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- if (prevnatvalue < natvalue) { /* what about > ? */
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n",
- prevnatvalue, natvalue);
- }
- else if (prevnatvalue == natvalue) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", natvalue);
- if (FOLD) {
- U8 foldbuf[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const UV f = to_uni_fold(natvalue, foldbuf, &foldlen);
-
-#ifdef EBCDIC /* RD t/uni/fold ff and 6b */
- if (RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xDF || f == 0x92)) {
- f = NATIVE_TO_UNI(f);
- }
-#endif
- /* If folding and foldable and a single
- * character, insert also the folded version
- * to the charclass. */
- if (f != value) {
-#ifdef EBCDIC /* RD tunifold ligatures s,t fb05, fb06 */
- if ((RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xA2 &&
- (value == 0xFB05 || value == 0xFB06))) ?
- foldlen == ((STRLEN)UNISKIP(f) - 1) :
- foldlen == (STRLEN)UNISKIP(f) )
-#else
- if (foldlen == (STRLEN)UNISKIP(f))
-#endif
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n", f);
- else {
- /* Any multicharacter foldings
- * require the following transform:
- * [ABCDEF] -> (?:[ABCabcDEFd]|pq|rst)
- * where E folds into "pq" and F folds
- * into "rst", all other characters
- * fold to single characters. We save
- * away these multicharacter foldings,
- * to be later saved as part of the
- * additional "s" data. */
- SV *sv;
-
- if (!unicode_alternate)
- unicode_alternate = newAV();
- sv = newSVpvn_utf8((char*)foldbuf, foldlen,
- TRUE);
- av_push(unicode_alternate, sv);
- }
- }
-
- /* If folding and the value is one of the Greek
- * sigmas insert a few more sigmas to make the
- * folding rules of the sigmas to work right.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (literal or EXACTF cases) are handled
- * during runtime in regexec.c:S_find_byclass(). */
- if (value == UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA);
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- else if (value == UNICODE_GREEK_CAPITAL_LETTER_SIGMA)
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- }
- }
-#ifdef EBCDIC
- literal_endpoint = 0;
-#endif
- }
-
- range = 0; /* this range (if it was one) is done now */
- }
-
- if (need_class) {
- ANYOF_FLAGS(ret) |= ANYOF_LARGE;
- if (SIZE_ONLY)
- RExC_size += ANYOF_CLASS_ADD_SKIP;
- else
- RExC_emit += ANYOF_CLASS_ADD_SKIP;
- }
-
-
- if (SIZE_ONLY)
- return ret;
- /****** !SIZE_ONLY AFTER HERE *********/
-
- if( stored == 1 && (value < 128 || (value < 256 && !UTF))
- && !( ANYOF_FLAGS(ret) & ( ANYOF_FLAGS_ALL ^ ANYOF_FOLD ) )
- ) {
- /* optimize single char class to an EXACT node
- but *only* when its not a UTF/high char */
- const char * cur_parse= RExC_parse;
- RExC_emit = (regnode *)orig_emit;
- RExC_parse = (char *)orig_parse;
- ret = reg_node(pRExC_state,
- (U8)((ANYOF_FLAGS(ret) & ANYOF_FOLD) ? EXACTF : EXACT));
- RExC_parse = (char *)cur_parse;
- *STRING(ret)= (char)value;
- STR_LEN(ret)= 1;
- RExC_emit += STR_SZ(1);
- if (listsv) {
- SvREFCNT_dec(listsv);
- }
- return ret;
- }
- /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */
- if ( /* If the only flag is folding (plus possibly inversion). */
- ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD)
- ) {
- for (value = 0; value < 256; ++value) {
- if (ANYOF_BITMAP_TEST(ret, value)) {
- UV fold = PL_fold[value];
-
- if (fold != value)
- ANYOF_BITMAP_SET(ret, fold);
- }
- }
- ANYOF_FLAGS(ret) &= ~ANYOF_FOLD;
- }
-
- /* optimize inverted simple patterns (e.g. [^a-z]) */
- if (optimize_invert &&
- /* If the only flag is inversion. */
- (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) {
- for (value = 0; value < ANYOF_BITMAP_SIZE; ++value)
- ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL;
- ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL;
- }
- {
- AV * const av = newAV();
- SV *rv;
- /* The 0th element stores the character class description
- * in its textual form: used later (regexec.c:Perl_regclass_swash())
- * to initialize the appropriate swash (which gets stored in
- * the 1st element), and also useful for dumping the regnode.
- * The 2nd element stores the multicharacter foldings,
- * used later (regexec.c:S_reginclass()). */
- av_store(av, 0, listsv);
- av_store(av, 1, NULL);
- av_store(av, 2, MUTABLE_SV(unicode_alternate));
- rv = newRV_noinc(MUTABLE_SV(av));
- n = add_data(pRExC_state, 1, "s");
- RExC_rxi->data->data[n] = (void*)rv;
- ARG_SET(ret, n);
- }
- return ret;
-}
-#undef _C_C_T_
-
-
-/* reg_skipcomment()
-
- Absorbs an /x style # comments from the input stream.
- Returns true if there is more text remaining in the stream.
- Will set the REG_SEEN_RUN_ON_COMMENT flag if the comment
- terminates the pattern without including a newline.
-
- Note its the callers responsibility to ensure that we are
- actually in /x mode
-
-*/
-
-STATIC bool
-S_reg_skipcomment(pTHX_ RExC_state_t *pRExC_state)
-{
- bool ended = 0;
-
- PERL_ARGS_ASSERT_REG_SKIPCOMMENT;
-
- while (RExC_parse < RExC_end)
- if (*RExC_parse++ == '\n') {
- ended = 1;
- break;
- }
- if (!ended) {
- /* we ran off the end of the pattern without ending
- the comment, so we have to add an \n when wrapping */
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- return 0;
- } else
- return 1;
-}
-
-/* nextchar()
-
- Advance that parse position, and optionall absorbs
- "whitespace" from the inputstream.
-
- Without /x "whitespace" means (?#...) style comments only,
- with /x this means (?#...) and # comments and whitespace proper.
-
- Returns the RExC_parse point from BEFORE the scan occurs.
-
- This is the /x friendly way of saying RExC_parse++.
-*/
-
-STATIC char*
-S_nextchar(pTHX_ RExC_state_t *pRExC_state)
-{
- char* const retval = RExC_parse++;
-
- PERL_ARGS_ASSERT_NEXTCHAR;
-
- for (;;) {
- if (*RExC_parse == '(' && RExC_parse[1] == '?' &&
- RExC_parse[2] == '#') {
- while (*RExC_parse != ')') {
- if (RExC_parse == RExC_end)
- FAIL("Sequence (?#... not terminated");
- RExC_parse++;
- }
- RExC_parse++;
- continue;
- }
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if (isSPACE(*RExC_parse)) {
- RExC_parse++;
- continue;
- }
- else if (*RExC_parse == '#') {
- if ( reg_skipcomment( pRExC_state ) )
- continue;
- }
- }
- return retval;
- }
-}
-
-/*
-- reg_node - emit a node
-*/
-STATIC regnode * /* Location. */
-S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 1;
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE(ptr, op);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s:%d: (op %s) %s %"UVuf" (len %"UVuf") (max %"UVuf").\n",
- "reg_node", __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(RExC_emit, RExC_parse + (op == END));
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reganode - emit a node with an argument
-*/
-STATIC regnode * /* Location. */
-S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGANODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 2;
- /*
- We can't do this:
-
- assert(2==regarglen[op]+1);
-
- Anything larger than this has to allocate the extra amount.
- If we changed this to be:
-
- RExC_size += (1 + regarglen[op]);
-
- then it wouldn't matter. Its not clear what side effect
- might come from that so its not done so far.
- -- dmq
- */
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE_ARG(ptr, op, arg);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reganode",
- __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] ?
- "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Cur_Node_Offset;
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reguni - emit (if appropriate) a Unicode character
-*/
-STATIC STRLEN
-S_reguni(pTHX_ const RExC_state_t *pRExC_state, UV uv, char* s)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGUNI;
-
- return SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s);
-}
-
-/*
-- reginsert - insert an operator in front of already-emitted operand
-*
-* Means relocating the operand.
-*/
-STATIC void
-S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd, U32 depth)
-{
- dVAR;
- register regnode *src;
- register regnode *dst;
- register regnode *place;
- const int offset = regarglen[(U8)op];
- const int size = NODE_STEP_REGNODE + offset;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGINSERT;
- PERL_UNUSED_ARG(depth);
-/* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */
- DEBUG_PARSE_FMT("inst"," - %s",PL_reg_name[op]);
- if (SIZE_ONLY) {
- RExC_size += size;
- return;
- }
-
- src = RExC_emit;
- RExC_emit += size;
- dst = RExC_emit;
- if (RExC_open_parens) {
- int paren;
- /*DEBUG_PARSE_FMT("inst"," - %"IVdf, (IV)RExC_npar);*/
- for ( paren=0 ; paren < RExC_npar ; paren++ ) {
- if ( RExC_open_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("open"," - %d",size);*/
- RExC_open_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("open"," - %s","ok");*/
- }
- if ( RExC_close_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("close"," - %d",size);*/
- RExC_close_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("close"," - %s","ok");*/
- }
- }
- }
-
- while (src > opnd) {
- StructCopy(--src, --dst, regnode);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD 20010112 */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s copy %"UVuf" -> %"UVuf" (max %"UVuf").\n",
- "reg_insert",
- __LINE__,
- PL_reg_name[op],
- (UV)(dst - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(src - RExC_emit_start),
- (UV)(dst - RExC_emit_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src));
- Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src));
- }
-#endif
- }
-
-
- place = opnd; /* Op node, where operand used to be. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reginsert",
- __LINE__,
- PL_reg_name[op],
- (UV)(place - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(place - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(place, RExC_parse);
- Set_Node_Length(place, 1);
- }
-#endif
- src = NEXTOPER(place);
- FILL_ADVANCE_NODE(place, op);
- Zero(src, offset, regnode);
-}
-
-/*
-- regtail - set the next-pointer at the end of a node chain of p to val.
-- SEE ALSO: regtail_study
-*/
-/* TODO: All three parms should be const */
-STATIC void
-S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- if (SIZE_ONLY)
- return;
-
- /* Find last node. */
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tail" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) %s %s\n",
- SvPV_nolen_const(mysv), REG_NODE_NUM(scan),
- (temp == NULL ? "->" : ""),
- (temp == NULL ? PL_reg_name[OP(val)] : "")
- );
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
-
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-}
-
-#ifdef DEBUGGING
-/*
-- regtail_study - set the next-pointer at the end of a node chain of p to val.
-- Look for optimizable sequences at the same time.
-- currently only looks for EXACT chains.
-
-This is expermental code. The idea is to use this routine to perform
-in place optimizations on branches and groups as they are constructed,
-with the long term intention of removing optimization from study_chunk so
-that it is purely analytical.
-
-Currently only used when in DEBUG mode. The macro REGTAIL_STUDY() is used
-to control which is which.
-
-*/
-/* TODO: All four parms should be const */
-
-STATIC U8
-S_regtail_study(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- U8 exact = PSEUDO;
-#ifdef EXPERIMENTAL_INPLACESCAN
- I32 min = 0;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL_STUDY;
-
-
- if (SIZE_ONLY)
- return exact;
-
- /* Find last node. */
-
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (PL_regkind[OP(scan)] == EXACT)
- if (join_exact(pRExC_state,scan,&min,1,val,depth+1))
- return EXACT;
-#endif
- if ( exact ) {
- switch (OP(scan)) {
- case EXACT:
- case EXACTF:
- case EXACTFL:
- if( exact == PSEUDO )
- exact= OP(scan);
- else if ( exact != OP(scan) )
- exact= 0;
- case NOTHING:
- break;
- default:
- exact= 0;
- }
- }
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tsdy" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) -> %s\n",
- SvPV_nolen_const(mysv),
- REG_NODE_NUM(scan),
- PL_reg_name[exact]);
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
- DEBUG_PARSE_r({
- SV * const mysv_val=sv_newmortal();
- DEBUG_PARSE_MSG("");
- regprop(RExC_rx, mysv_val, val);
- PerlIO_printf(Perl_debug_log, "~ attach to %s (%"IVdf") offset to %"IVdf"\n",
- SvPV_nolen_const(mysv_val),
- (IV)REG_NODE_NUM(val),
- (IV)(val - scan)
- );
- });
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-
- return exact;
-}
-#endif
-
-/*
- - regcurly - a little FSA that accepts {\d+,?\d*}
- */
-STATIC I32
-S_regcurly(register const char *s)
-{
- PERL_ARGS_ASSERT_REGCURLY;
-
- if (*s++ != '{')
- return FALSE;
- if (!isDIGIT(*s))
- return FALSE;
- while (isDIGIT(*s))
- s++;
- if (*s == ',')
- s++;
- while (isDIGIT(*s))
- s++;
- if (*s != '}')
- return FALSE;
- return TRUE;
-}
-
-
-/*
- - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form
- */
-#ifdef DEBUGGING
-static void
-S_regdump_extflags(pTHX_ const char *lead, const U32 flags)
-{
- int bit;
- int set=0;
-
- for (bit=0; bit<32; bit++) {
- if (flags & (1<<bit)) {
- if (!set++ && lead)
- PerlIO_printf(Perl_debug_log, "%s",lead);
- PerlIO_printf(Perl_debug_log, "%s ",PL_reg_extflags_name[bit]);
- }
- }
- if (lead) {
- if (set)
- PerlIO_printf(Perl_debug_log, "\n");
- else
- PerlIO_printf(Perl_debug_log, "%s[none-set]\n",lead);
- }
-}
-#endif
-
-void
-Perl_regdump(pTHX_ const regexp *r)
-{
-#ifdef DEBUGGING
- dVAR;
- SV * const sv = sv_newmortal();
- SV *dsv= sv_newmortal();
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGDUMP;
-
- (void)dumpuntil(r, ri->program, ri->program + 1, NULL, NULL, sv, 0, 0);
-
- /* Header fields of interest. */
- if (r->anchored_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->anchored_substr),
- RE_SV_DUMPLEN(r->anchored_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_substr),
- (IV)r->anchored_offset);
- } else if (r->anchored_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->anchored_utf8),
- RE_SV_DUMPLEN(r->anchored_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored utf8 %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_utf8),
- (IV)r->anchored_offset);
- }
- if (r->float_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->float_substr),
- RE_SV_DUMPLEN(r->float_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "floating %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_substr),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- } else if (r->float_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->float_utf8),
- RE_SV_DUMPLEN(r->float_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "floating utf8 %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_utf8),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- }
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log,
- (const char *)
- (r->check_substr == r->float_substr
- && r->check_utf8 == r->float_utf8
- ? "(checking floating" : "(checking anchored"));
- if (r->extflags & RXf_NOSCAN)
- PerlIO_printf(Perl_debug_log, " noscan");
- if (r->extflags & RXf_CHECK_ALL)
- PerlIO_printf(Perl_debug_log, " isall");
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log, ") ");
-
- if (ri->regstclass) {
- regprop(r, sv, ri->regstclass);
- PerlIO_printf(Perl_debug_log, "stclass %s ", SvPVX_const(sv));
- }
- if (r->extflags & RXf_ANCH) {
- PerlIO_printf(Perl_debug_log, "anchored");
- if (r->extflags & RXf_ANCH_BOL)
- PerlIO_printf(Perl_debug_log, "(BOL)");
- if (r->extflags & RXf_ANCH_MBOL)
- PerlIO_printf(Perl_debug_log, "(MBOL)");
- if (r->extflags & RXf_ANCH_SBOL)
- PerlIO_printf(Perl_debug_log, "(SBOL)");
- if (r->extflags & RXf_ANCH_GPOS)
- PerlIO_printf(Perl_debug_log, "(GPOS)");
- PerlIO_putc(Perl_debug_log, ' ');
- }
- if (r->extflags & RXf_GPOS_SEEN)
- PerlIO_printf(Perl_debug_log, "GPOS:%"UVuf" ", (UV)r->gofs);
- if (r->intflags & PREGf_SKIP)
- PerlIO_printf(Perl_debug_log, "plus ");
- if (r->intflags & PREGf_IMPLICIT)
- PerlIO_printf(Perl_debug_log, "implicit ");
- PerlIO_printf(Perl_debug_log, "minlen %"IVdf" ", (IV)r->minlen);
- if (r->extflags & RXf_EVAL_SEEN)
- PerlIO_printf(Perl_debug_log, "with eval ");
- PerlIO_printf(Perl_debug_log, "\n");
- DEBUG_FLAGS_r(regdump_extflags("r->extflags: ",r->extflags));
-#else
- PERL_ARGS_ASSERT_REGDUMP;
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(r);
-#endif /* DEBUGGING */
-}
-
-/*
-- regprop - printable representation of opcode
-*/
-#define EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags) \
-STMT_START { \
- if (do_sep) { \
- Perl_sv_catpvf(aTHX_ sv,"%s][%s",PL_colors[1],PL_colors[0]); \
- if (flags & ANYOF_INVERT) \
- /*make sure the invert info is in each */ \
- sv_catpvs(sv, "^"); \
- do_sep = 0; \
- } \
-} STMT_END
-
-void
-Perl_regprop(pTHX_ const regexp *prog, SV *sv, const regnode *o)
-{
-#ifdef DEBUGGING
- dVAR;
- register int k;
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPROP;
-
- sv_setpvs(sv, "");
-
- if (OP(o) > REGNODE_MAX) /* regnode.type is unsigned */
- /* It would be nice to FAIL() here, but this may be called from
- regexec.c, and it would be hard to supply pRExC_state. */
- Perl_croak(aTHX_ "Corrupted regexp opcode %d > %d", (int)OP(o), (int)REGNODE_MAX);
- sv_catpv(sv, PL_reg_name[OP(o)]); /* Take off const! */
-
- k = PL_regkind[OP(o)];
-
- if (k == EXACT) {
- sv_catpvs(sv, " ");
- /* Using is_utf8_string() (via PERL_PV_UNI_DETECT)
- * is a crude hack but it may be the best for now since
- * we have no flag "this EXACTish node was UTF-8"
- * --jhi */
- pv_pretty(sv, STRING(o), STR_LEN(o), 60, PL_colors[0], PL_colors[1],
- PERL_PV_ESCAPE_UNI_DETECT |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT |
- PERL_PV_PRETTY_NOCLEAR
- );
- } else if (k == TRIE) {
- /* print the details of the trie in dumpuntil instead, as
- * progi->data isn't available here */
- const char op = OP(o);
- const U32 n = ARG(o);
- const reg_ac_data * const ac = IS_TRIE_AC(op) ?
- (reg_ac_data *)progi->data->data[n] :
- NULL;
- const reg_trie_data * const trie
- = (reg_trie_data*)progi->data->data[!IS_TRIE_AC(op) ? n : ac->trie];
-
- Perl_sv_catpvf(aTHX_ sv, "-%s",PL_reg_name[o->flags]);
- DEBUG_TRIE_COMPILE_r(
- Perl_sv_catpvf(aTHX_ sv,
- "<S:%"UVuf"/%"IVdf" W:%"UVuf" L:%"UVuf"/%"UVuf" C:%"UVuf"/%"UVuf">",
- (UV)trie->startstate,
- (IV)trie->statecount-1, /* -1 because of the unused 0 element */
- (UV)trie->wordcount,
- (UV)trie->minlen,
- (UV)trie->maxlen,
- (UV)TRIE_CHARCOUNT(trie),
- (UV)trie->uniquecharcount
- )
- );
- if ( IS_ANYOF_TRIE(op) || trie->bitmap ) {
- int i;
- int rangestart = -1;
- U8* bitmap = IS_ANYOF_TRIE(op) ? (U8*)ANYOF_BITMAP(o) : (U8*)TRIE_BITMAP(trie);
- sv_catpvs(sv, "[");
- for (i = 0; i <= 256; i++) {
- if (i < 256 && BITMAP_TEST(bitmap,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- rangestart = -1;
- }
- }
- sv_catpvs(sv, "]");
- }
-
- } else if (k == CURLY) {
- if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */
- Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o));
- }
- else if (k == WHILEM && o->flags) /* Ordinal/of */
- Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4);
- else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP || OP(o)==ACCEPT) {
- Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */
- if ( RXp_PAREN_NAMES(prog) ) {
- if ( k != REF || OP(o) < NREF) {
- AV *list= MUTABLE_AV(progi->data->data[progi->name_list_idx]);
- SV **name= av_fetch(list, ARG(o), 0 );
- if (name)
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- else {
- AV *list= MUTABLE_AV(progi->data->data[ progi->name_list_idx ]);
- SV *sv_dat= MUTABLE_SV(progi->data->data[ ARG( o ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
- SV **name= av_fetch(list, nums[0], 0 );
- I32 n;
- if (name) {
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- Perl_sv_catpvf(aTHX_ sv, "%s%"IVdf,
- (n ? "," : ""), (IV)nums[n]);
- }
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- }
- }
- } else if (k == GOSUB)
- Perl_sv_catpvf(aTHX_ sv, "%d[%+d]", (int)ARG(o),(int)ARG2L(o)); /* Paren and offset */
- else if (k == VERB) {
- if (!o->flags)
- Perl_sv_catpvf(aTHX_ sv, ":%"SVf,
- SVfARG((MUTABLE_SV(progi->data->data[ ARG( o ) ]))));
- } else if (k == LOGICAL)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */
- else if (k == FOLDCHAR)
- Perl_sv_catpvf(aTHX_ sv, "[0x%"UVXf"]", PTR2UV(ARG(o)) );
- else if (k == ANYOF) {
- int i, rangestart = -1;
- const U8 flags = ANYOF_FLAGS(o);
- int do_sep = 0;
-
- /* Should be synchronized with * ANYOF_ #xdefines in regcomp.h */
- static const char * const anyofs[] = {
- "\\w",
- "\\W",
- "\\s",
- "\\S",
- "\\d",
- "\\D",
- "[:alnum:]",
- "[:^alnum:]",
- "[:alpha:]",
- "[:^alpha:]",
- "[:ascii:]",
- "[:^ascii:]",
- "[:cntrl:]",
- "[:^cntrl:]",
- "[:graph:]",
- "[:^graph:]",
- "[:lower:]",
- "[:^lower:]",
- "[:print:]",
- "[:^print:]",
- "[:punct:]",
- "[:^punct:]",
- "[:upper:]",
- "[:^upper:]",
- "[:xdigit:]",
- "[:^xdigit:]",
- "[:space:]",
- "[:^space:]",
- "[:blank:]",
- "[:^blank:]"
- };
-
- if (flags & ANYOF_LOCALE)
- sv_catpvs(sv, "{loc}");
- if (flags & ANYOF_FOLD)
- sv_catpvs(sv, "{i}");
- Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]);
- if (flags & ANYOF_INVERT)
- sv_catpvs(sv, "^");
-
- /* output what the standard cp 0-255 bitmap matches */
- for (i = 0; i <= 256; i++) {
- if (i < 256 && ANYOF_BITMAP_TEST(o,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- do_sep = 1;
- rangestart = -1;
- }
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
- /* output any special charclass tests (used mostly under use locale) */
- if (o->flags & ANYOF_CLASS)
- for (i = 0; i < (int)(sizeof(anyofs)/sizeof(char*)); i++)
- if (ANYOF_CLASS_TEST(o,i)) {
- sv_catpv(sv, anyofs[i]);
- do_sep = 1;
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
-
- /* output information about the unicode matching */
- if (flags & ANYOF_UNICODE)
- sv_catpvs(sv, "{unicode}");
- else if (flags & ANYOF_UNICODE_ALL)
- sv_catpvs(sv, "{unicode_all}");
-
- {
- SV *lv;
- SV * const sw = regclass_swash(prog, o, FALSE, &lv, 0);
-
- if (lv) {
- if (sw) {
- U8 s[UTF8_MAXBYTES_CASE+1];
-
- for (i = 0; i <= 256; i++) { /* just the first 256 */
- uvchr_to_utf8(s, i);
-
- if (i < 256 && swash_fetch(sw, s, TRUE)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++) {
- const U8 * const e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for(p = s; p < e; p++)
- put_byte(sv, *p);
- }
- else {
- const U8 *e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- sv_catpvs(sv, "-");
- e = uvchr_to_utf8(s, i-1);
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- }
- rangestart = -1;
- }
- }
-
- sv_catpvs(sv, "..."); /* et cetera */
- }
-
- {
- char *s = savesvpv(lv);
- char * const origs = s;
-
- while (*s && *s != '\n')
- s++;
-
- if (*s == '\n') {
- const char * const t = ++s;
-
- while (*s) {
- if (*s == '\n')
- *s = ' ';
- s++;
- }
- if (s[-1] == ' ')
- s[-1] = 0;
-
- sv_catpv(sv, t);
- }
-
- Safefree(origs);
- }
- }
- }
-
- Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]);
- }
- else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH))
- Perl_sv_catpvf(aTHX_ sv, "[%d]", -(o->flags));
-#else
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(sv);
- PERL_UNUSED_ARG(o);
- PERL_UNUSED_ARG(prog);
-#endif /* DEBUGGING */
-}
-
-SV *
-Perl_re_intuit_string(pTHX_ REGEXP * const r)
-{ /* Assume that RE_INTUIT is set */
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_STRING;
- PERL_UNUSED_CONTEXT;
-
- DEBUG_COMPILE_r(
- {
- const char * const s = SvPV_nolen_const(prog->check_substr
- ? prog->check_substr : prog->check_utf8);
-
- if (!PL_colorset) reginitcolors();
- PerlIO_printf(Perl_debug_log,
- "%sUsing REx %ssubstr:%s \"%s%.60s%s%s\"\n",
- PL_colors[4],
- prog->check_substr ? "" : "utf8 ",
- PL_colors[5],PL_colors[0],
- s,
- PL_colors[1],
- (strlen(s) > 60 ? "..." : ""));
- } );
-
- return prog->check_substr ? prog->check_substr : prog->check_utf8;
-}
-
-/*
- pregfree()
-
- handles refcounting and freeing the perl core regexp structure. When
- it is necessary to actually free the structure the first thing it
- does is call the 'free' method of the regexp_engine associated to to
- the regexp, allowing the handling of the void *pprivate; member
- first. (This routine is not overridable by extensions, which is why
- the extensions free is called first.)
-
- See regdupe and regdupe_internal if you change anything here.
-*/
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_pregfree(pTHX_ REGEXP *r)
-{
- SvREFCNT_dec(r);
-}
-
-void
-Perl_pregfree2(pTHX_ REGEXP *rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_PREGFREE2;
-
- if (r->mother_re) {
- ReREFCNT_dec(r->mother_re);
- } else {
- CALLREGFREE_PVT(rx); /* free the private data */
- if (RXp_PAREN_NAMES(r))
- SvREFCNT_dec(RXp_PAREN_NAMES(r));
- }
- if (r->substrs) {
- if (r->anchored_substr)
- SvREFCNT_dec(r->anchored_substr);
- if (r->anchored_utf8)
- SvREFCNT_dec(r->anchored_utf8);
- if (r->float_substr)
- SvREFCNT_dec(r->float_substr);
- if (r->float_utf8)
- SvREFCNT_dec(r->float_utf8);
- Safefree(r->substrs);
- }
- RX_MATCH_COPY_FREE(rx);
-#ifdef PERL_OLD_COPY_ON_WRITE
- if (r->saved_copy)
- SvREFCNT_dec(r->saved_copy);
-#endif
- Safefree(r->offs);
-}
-
-/* reg_temp_copy()
-
- This is a hacky workaround to the structural issue of match results
- being stored in the regexp structure which is in turn stored in
- PL_curpm/PL_reg_curpm. The problem is that due to qr// the pattern
- could be PL_curpm in multiple contexts, and could require multiple
- result sets being associated with the pattern simultaneously, such
- as when doing a recursive match with (??{$qr})
-
- The solution is to make a lightweight copy of the regexp structure
- when a qr// is returned from the code executed by (??{$qr}) this
- lightweight copy doesnt actually own any of its data except for
- the starp/end and the actual regexp structure itself.
-
-*/
-
-
-REGEXP *
-Perl_reg_temp_copy (pTHX_ REGEXP *rx)
-{
- REGEXP *ret_x = (REGEXP*) newSV_type(SVt_REGEXP);
- struct regexp *ret = (struct regexp *)SvANY(ret_x);
- struct regexp *const r = (struct regexp *)SvANY(rx);
- register const I32 npar = r->nparens+1;
-
- PERL_ARGS_ASSERT_REG_TEMP_COPY;
-
- (void)ReREFCNT_inc(rx);
- /* We can take advantage of the existing "copied buffer" mechanism in SVs
- by pointing directly at the buffer, but flagging that the allocated
- space in the copy is zero. As we've just done a struct copy, it's now
- a case of zero-ing that, rather than copying the current length. */
- SvPV_set(ret_x, RX_WRAPPED(rx));
- SvFLAGS(ret_x) |= SvFLAGS(rx) & (SVf_POK|SVp_POK|SVf_UTF8);
- memcpy(&(ret->xpv_cur), &(r->xpv_cur),
- sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur));
- SvLEN_set(ret_x, 0);
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if (r->substrs) {
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- SvREFCNT_inc_void(ret->anchored_substr);
- SvREFCNT_inc_void(ret->anchored_utf8);
- SvREFCNT_inc_void(ret->float_substr);
- SvREFCNT_inc_void(ret->float_utf8);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
- }
- RX_MATCH_COPIED_off(ret_x);
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
- ret->mother_re = rx;
-
- return ret_x;
-}
-#endif
-
-/* regfree_internal()
-
- Free the private data in a regexp. This is overloadable by
- extensions. Perl takes care of the regexp structure in pregfree(),
- this covers the *pprivate pointer which technically perldoesnt
- know about, however of course we have to handle the
- regexp_internal structure when no extension is in use.
-
- Note this is called before freeing anything in the regexp
- structure.
- */
-
-void
-Perl_regfree_internal(pTHX_ REGEXP * const rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGFREE_INTERNAL;
-
- DEBUG_COMPILE_r({
- if (!PL_colorset)
- reginitcolors();
- {
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RX_UTF8(rx),
- dsv, RX_PRECOMP(rx), RX_PRELEN(rx), 60);
- PerlIO_printf(Perl_debug_log,"%sFreeing REx:%s %s\n",
- PL_colors[4],PL_colors[5],s);
- }
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets)
- Safefree(ri->u.offsets); /* 20010421 MJD */
-#endif
- if (ri->data) {
- int n = ri->data->count;
- PAD* new_comppad = NULL;
- PAD* old_comppad;
- PADOFFSET refcnt;
-
- while (--n >= 0) {
- /* If you add a ->what type here, update the comment in regcomp.h */
- switch (ri->data->what[n]) {
- case 's':
- case 'S':
- case 'u':
- SvREFCNT_dec(MUTABLE_SV(ri->data->data[n]));
- break;
- case 'f':
- Safefree(ri->data->data[n]);
- break;
- case 'p':
- new_comppad = MUTABLE_AV(ri->data->data[n]);
- break;
- case 'o':
- if (new_comppad == NULL)
- Perl_croak(aTHX_ "panic: pregfree comppad");
- PAD_SAVE_LOCAL(old_comppad,
- /* Watch out for global destruction's random ordering. */
- (SvTYPE(new_comppad) == SVt_PVAV) ? new_comppad : NULL
- );
- OP_REFCNT_LOCK;
- refcnt = OpREFCNT_dec((OP_4tree*)ri->data->data[n]);
- OP_REFCNT_UNLOCK;
- if (!refcnt)
- op_free((OP_4tree*)ri->data->data[n]);
-
- PAD_RESTORE_LOCAL(old_comppad);
- SvREFCNT_dec(MUTABLE_SV(new_comppad));
- new_comppad = NULL;
- break;
- case 'n':
- break;
- case 'T':
- { /* Aho Corasick add-on structure for a trie node.
- Used in stclass optimization only */
- U32 refcount;
- reg_ac_data *aho=(reg_ac_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --aho->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(aho->states);
- PerlMemShared_free(aho->fail);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- PerlMemShared_free(ri->regstclass);
- }
- }
- break;
- case 't':
- {
- /* trie structure. */
- U32 refcount;
- reg_trie_data *trie=(reg_trie_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --trie->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(trie->charmap);
- PerlMemShared_free(trie->states);
- PerlMemShared_free(trie->trans);
- if (trie->bitmap)
- PerlMemShared_free(trie->bitmap);
- if (trie->wordlen)
- PerlMemShared_free(trie->wordlen);
- if (trie->jump)
- PerlMemShared_free(trie->jump);
- if (trie->nextword)
- PerlMemShared_free(trie->nextword);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- }
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: regfree data code '%c'", ri->data->what[n]);
- }
- }
- Safefree(ri->data->what);
- Safefree(ri->data);
- }
-
- Safefree(ri);
-}
-
-#define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
-#define av_dup_inc(s,t) MUTABLE_AV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define hv_dup_inc(s,t) MUTABLE_HV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define SAVEPVN(p,n) ((p) ? savepvn(p,n) : NULL)
-
-/*
- re_dup - duplicate a regexp.
-
- This routine is expected to clone a given regexp structure. It is only
- compiled under USE_ITHREADS.
-
- After all of the core data stored in struct regexp is duplicated
- the regexp_engine.dupe method is used to copy any private data
- stored in the *pprivate pointer. This allows extensions to handle
- any duplication it needs to do.
-
- See pregfree() and regfree_internal() if you change anything here.
-*/
-#if defined(USE_ITHREADS)
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_re_dup_guts(pTHX_ const REGEXP *sstr, REGEXP *dstr, CLONE_PARAMS *param)
-{
- dVAR;
- I32 npar;
- const struct regexp *r = (const struct regexp *)SvANY(sstr);
- struct regexp *ret = (struct regexp *)SvANY(dstr);
-
- PERL_ARGS_ASSERT_RE_DUP_GUTS;
-
- npar = r->nparens+1;
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if(ret->swap) {
- /* no need to copy these */
- Newx(ret->swap, npar, regexp_paren_pair);
- }
-
- if (ret->substrs) {
- /* Do it this way to avoid reading from *r after the StructCopy().
- That way, if any of the sv_dup_inc()s dislodge *r from the L1
- cache, it doesn't matter. */
- const bool anchored = r->check_substr
- ? r->check_substr == r->anchored_substr
- : r->check_utf8 == r->anchored_utf8;
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- ret->anchored_substr = sv_dup_inc(ret->anchored_substr, param);
- ret->anchored_utf8 = sv_dup_inc(ret->anchored_utf8, param);
- ret->float_substr = sv_dup_inc(ret->float_substr, param);
- ret->float_utf8 = sv_dup_inc(ret->float_utf8, param);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
-
- if (ret->check_substr) {
- if (anchored) {
- assert(r->check_utf8 == r->anchored_utf8);
- ret->check_substr = ret->anchored_substr;
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- assert(r->check_substr == r->float_substr);
- assert(r->check_utf8 == r->float_utf8);
- ret->check_substr = ret->float_substr;
- ret->check_utf8 = ret->float_utf8;
- }
- } else if (ret->check_utf8) {
- if (anchored) {
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- ret->check_utf8 = ret->float_utf8;
- }
- }
- }
-
- RXp_PAREN_NAMES(ret) = hv_dup_inc(RXp_PAREN_NAMES(ret), param);
-
- if (ret->pprivate)
- RXi_SET(ret,CALLREGDUPE_PVT(dstr,param));
-
- if (RX_MATCH_COPIED(dstr))
- ret->subbeg = SAVEPVN(ret->subbeg, ret->sublen);
- else
- ret->subbeg = NULL;
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
-
- ret->mother_re = NULL;
- ret->gofs = 0;
-}
-#endif /* PERL_IN_XSUB_RE */
-
-/*
- regdupe_internal()
-
- This is the internal complement to regdupe() which is used to copy
- the structure pointed to by the *pprivate pointer in the regexp.
- This is the core version of the extension overridable cloning hook.
- The regexp structure being duplicated will be copied by perl prior
- to this and will be provided as the regexp *r argument, however
- with the /old/ structures pprivate pointer value. Thus this routine
- may override any copying normally done by perl.
-
- It returns a pointer to the new regexp_internal structure.
-*/
-
-void *
-Perl_regdupe_internal(pTHX_ REGEXP * const rx, CLONE_PARAMS *param)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- regexp_internal *reti;
- int len, npar;
- RXi_GET_DECL(r,ri);
-
- PERL_ARGS_ASSERT_REGDUPE_INTERNAL;
-
- npar = r->nparens+1;
- len = ProgLen(ri);
-
- Newxc(reti, sizeof(regexp_internal) + len*sizeof(regnode), char, regexp_internal);
- Copy(ri->program, reti->program, len+1, regnode);
-
-
- reti->regstclass = NULL;
-
- if (ri->data) {
- struct reg_data *d;
- const int count = ri->data->count;
- int i;
-
- Newxc(d, sizeof(struct reg_data) + count*sizeof(void *),
- char, struct reg_data);
- Newx(d->what, count, U8);
-
- d->count = count;
- for (i = 0; i < count; i++) {
- d->what[i] = ri->data->what[i];
- switch (d->what[i]) {
- /* legal options are one of: sSfpontTu
- see also regcomp.h and pregfree() */
- case 's':
- case 'S':
- case 'p': /* actually an AV, but the dup function is identical. */
- case 'u': /* actually an HV, but the dup function is identical. */
- d->data[i] = sv_dup_inc((const SV *)ri->data->data[i], param);
- break;
- case 'f':
- /* This is cheating. */
- Newx(d->data[i], 1, struct regnode_charclass_class);
- StructCopy(ri->data->data[i], d->data[i],
- struct regnode_charclass_class);
- reti->regstclass = (regnode*)d->data[i];
- break;
- case 'o':
- /* Compiled op trees are readonly and in shared memory,
- and can thus be shared without duplication. */
- OP_REFCNT_LOCK;
- d->data[i] = (void*)OpREFCNT_inc((OP*)ri->data->data[i]);
- OP_REFCNT_UNLOCK;
- break;
- case 'T':
- /* Trie stclasses are readonly and can thus be shared
- * without duplication. We free the stclass in pregfree
- * when the corresponding reg_ac_data struct is freed.
- */
- reti->regstclass= ri->regstclass;
- /* Fall through */
- case 't':
- OP_REFCNT_LOCK;
- ((reg_trie_data*)ri->data->data[i])->refcount++;
- OP_REFCNT_UNLOCK;
- /* Fall through */
- case 'n':
- d->data[i] = ri->data->data[i];
- break;
- default:
- Perl_croak(aTHX_ "panic: re_dup unknown data code '%c'", ri->data->what[i]);
- }
- }
-
- reti->data = d;
- }
- else
- reti->data = NULL;
-
- reti->name_list_idx = ri->name_list_idx;
-
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets) {
- Newx(reti->u.offsets, 2*len+1, U32);
- Copy(ri->u.offsets, reti->u.offsets, 2*len+1, U32);
- }
-#else
- SetProgLen(reti,len);
-#endif
-
- return (void*)reti;
-}
-
-#endif /* USE_ITHREADS */
-
-#ifndef PERL_IN_XSUB_RE
-
-/*
- - regnext - dig the "next" pointer out of a node
- */
-regnode *
-Perl_regnext(pTHX_ register regnode *p)
-{
- dVAR;
- register I32 offset;
-
- if (!p)
- return(NULL);
-
- offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p));
- if (offset == 0)
- return(NULL);
-
- return(p+offset);
-}
-#endif
-
-STATIC void
-S_re_croak2(pTHX_ const char* pat1,const char* pat2,...)
-{
- va_list args;
- STRLEN l1 = strlen(pat1);
- STRLEN l2 = strlen(pat2);
- char buf[512];
- SV *msv;
- const char *message;
-
- PERL_ARGS_ASSERT_RE_CROAK2;
-
- if (l1 > 510)
- l1 = 510;
- if (l1 + l2 > 510)
- l2 = 510 - l1;
- Copy(pat1, buf, l1 , char);
- Copy(pat2, buf + l1, l2 , char);
- buf[l1 + l2] = '\n';
- buf[l1 + l2 + 1] = '\0';
-#ifdef I_STDARG
- /* ANSI variant takes additional second argument */
- va_start(args, pat2);
-#else
- va_start(args);
-#endif
- msv = vmess(buf, &args);
- va_end(args);
- message = SvPV_const(msv,l1);
- if (l1 > 512)
- l1 = 512;
- Copy(message, buf, l1 , char);
- buf[l1-1] = '\0'; /* Overwrite \n */
- Perl_croak(aTHX_ "%s", buf);
-}
-
-/* XXX Here's a total kludge. But we need to re-enter for swash routines. */
-
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_save_re_context(pTHX)
-{
- dVAR;
-
- struct re_save_state *state;
-
- SAVEVPTR(PL_curcop);
- SSGROW(SAVESTACK_ALLOC_FOR_RE_SAVE_STATE + 1);
-
- state = (struct re_save_state *)(PL_savestack + PL_savestack_ix);
- PL_savestack_ix += SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
- SSPUSHINT(SAVEt_RE_STATE);
-
- Copy(&PL_reg_state, state, 1, struct re_save_state);
-
- PL_reg_start_tmp = 0;
- PL_reg_start_tmpl = 0;
- PL_reg_oldsaved = NULL;
- PL_reg_oldsavedlen = 0;
- PL_reg_maxiter = 0;
- PL_reg_leftiter = 0;
- PL_reg_poscache = NULL;
- PL_reg_poscache_size = 0;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = NULL;
-#endif
-
- /* Save $1..$n (#18107: UTF-8 s/(\w+)/uc($1)/e); AMS 20021106. */
- if (PL_curpm) {
- const REGEXP * const rx = PM_GETRE(PL_curpm);
- if (rx) {
- U32 i;
- for (i = 1; i <= RX_NPARENS(rx); i++) {
- char digits[TYPE_CHARS(long)];
- const STRLEN len = my_snprintf(digits, sizeof(digits), "%lu", (long)i);
- GV *const *const gvp
- = (GV**)hv_fetch(PL_defstash, digits, len, 0);
-
- if (gvp) {
- GV * const gv = *gvp;
- if (SvTYPE(gv) == SVt_PVGV && GvSV(gv))
- save_scalar(gv);
- }
- }
- }
- }
-}
-#endif
-
-static void
-clear_re(pTHX_ void *r)
-{
- dVAR;
- ReREFCNT_dec((REGEXP *)r);
-}
-
-#ifdef DEBUGGING
-
-STATIC void
-S_put_byte(pTHX_ SV *sv, int c)
-{
- PERL_ARGS_ASSERT_PUT_BYTE;
-
- /* Our definition of isPRINT() ignores locales, so only bytes that are
- not part of UTF-8 are considered printable. I assume that the same
- holds for UTF-EBCDIC.
- Also, code point 255 is not printable in either (it's E0 in EBCDIC,
- which Wikipedia says:
-
- EO, or Eight Ones, is an 8-bit EBCDIC character code represented as all
- ones (binary 1111 1111, hexadecimal FF). It is similar, but not
- identical, to the ASCII delete (DEL) or rubout control character.
- ) So the old condition can be simplified to !isPRINT(c) */
- if (!isPRINT(c))
- Perl_sv_catpvf(aTHX_ sv, "\\%o", c);
- else {
- const char string = c;
- if (c == '-' || c == ']' || c == '\\' || c == '^')
- sv_catpvs(sv, "\\");
- sv_catpvn(sv, &string, 1);
- }
-}
-
-
-#define CLEAR_OPTSTART \
- if (optstart) STMT_START { \
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log, " (%"IVdf" nodes)\n", (IV)(node - optstart))); \
- optstart=NULL; \
- } STMT_END
-
-#define DUMPUNTIL(b,e) CLEAR_OPTSTART; node=dumpuntil(r,start,(b),(e),last,sv,indent+1,depth+1);
-
-STATIC const regnode *
-S_dumpuntil(pTHX_ const regexp *r, const regnode *start, const regnode *node,
- const regnode *last, const regnode *plast,
- SV* sv, I32 indent, U32 depth)
-{
- dVAR;
- register U8 op = PSEUDO; /* Arbitrary non-END op. */
- register const regnode *next;
- const regnode *optstart= NULL;
-
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMPUNTIL;
-
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d : %d - %d - %d\n",indent,node-start,
- last ? last-start : 0,plast ? plast-start : 0);
-#endif
-
- if (plast && plast < last)
- last= plast;
-
- while (PL_regkind[op] != END && (!last || node < last)) {
- /* While that wasn't END last time... */
- NODE_ALIGN(node);
- op = OP(node);
- if (op == CLOSE || op == WHILEM)
- indent--;
- next = regnext((regnode *)node);
-
- /* Where, what. */
- if (OP(node) == OPTIMIZED) {
- if (!optstart && RE_DEBUG_FLAG(RE_DEBUG_COMPILE_OPTIMISE))
- optstart = node;
- else
- goto after_print;
- } else
- CLEAR_OPTSTART;
-
- regprop(r, sv, node);
- PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start),
- (int)(2*indent + 1), "", SvPVX_const(sv));
-
- if (OP(node) != OPTIMIZED) {
- if (next == NULL) /* Next ptr. */
- PerlIO_printf(Perl_debug_log, " (0)");
- else if (PL_regkind[(U8)op] == BRANCH && PL_regkind[OP(next)] != BRANCH )
- PerlIO_printf(Perl_debug_log, " (FAIL)");
- else
- PerlIO_printf(Perl_debug_log, " (%"IVdf")", (IV)(next - start));
- (void)PerlIO_putc(Perl_debug_log, '\n');
- }
-
- after_print:
- if (PL_regkind[(U8)op] == BRANCHJ) {
- assert(next);
- {
- register const regnode *nnode = (OP(next) == LONGJMP
- ? regnext((regnode *)next)
- : next);
- if (last && nnode > last)
- nnode = last;
- DUMPUNTIL(NEXTOPER(NEXTOPER(node)), nnode);
- }
- }
- else if (PL_regkind[(U8)op] == BRANCH) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node), next);
- }
- else if ( PL_regkind[(U8)op] == TRIE ) {
- const regnode *this_trie = node;
- const char op = OP(node);
- const U32 n = ARG(node);
- const reg_ac_data * const ac = op>=AHOCORASICK ?
- (reg_ac_data *)ri->data->data[n] :
- NULL;
- const reg_trie_data * const trie =
- (reg_trie_data*)ri->data->data[op<AHOCORASICK ? n : ac->trie];
-#ifdef DEBUGGING
- AV *const trie_words = MUTABLE_AV(ri->data->data[n + TRIE_WORDS_OFFSET]);
-#endif
- const regnode *nextbranch= NULL;
- I32 word_idx;
- sv_setpvs(sv, "");
- for (word_idx= 0; word_idx < (I32)trie->wordcount; word_idx++) {
- SV ** const elem_ptr = av_fetch(trie_words,word_idx,0);
-
- PerlIO_printf(Perl_debug_log, "%*s%s ",
- (int)(2*(indent+3)), "",
- elem_ptr ? pv_pretty(sv, SvPV_nolen_const(*elem_ptr), SvCUR(*elem_ptr), 60,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*elem_ptr) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT
- )
- : "???"
- );
- if (trie->jump) {
- U16 dist= trie->jump[word_idx+1];
- PerlIO_printf(Perl_debug_log, "(%"UVuf")\n",
- (UV)((dist ? this_trie + dist : next) - start));
- if (dist) {
- if (!nextbranch)
- nextbranch= this_trie + trie->jump[0];
- DUMPUNTIL(this_trie + dist, nextbranch);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode *)nextbranch);
- } else {
- PerlIO_printf(Perl_debug_log, "\n");
- }
- }
- if (last && next > last)
- node= last;
- else
- node= next;
- }
- else if ( op == CURLY ) { /* "next" might be very big: optimizer */
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS,
- NEXTOPER(node) + EXTRA_STEP_2ARGS + 1);
- }
- else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, next);
- }
- else if ( op == PLUS || op == STAR) {
- DUMPUNTIL(NEXTOPER(node), NEXTOPER(node) + 1);
- }
- else if (op == ANYOF) {
- /* arglen 1 + class block */
- node += 1 + ((ANYOF_FLAGS(node) & ANYOF_LARGE)
- ? ANYOF_CLASS_SKIP : ANYOF_SKIP);
- node = NEXTOPER(node);
- }
- else if (PL_regkind[(U8)op] == EXACT) {
- /* Literal string, where present. */
- node += NODE_SZ_STR(node) - 1;
- node = NEXTOPER(node);
- }
- else {
- node = NEXTOPER(node);
- node += regarglen[(U8)op];
- }
- if (op == CURLYX || op == OPEN)
- indent++;
- }
- CLEAR_OPTSTART;
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d\n", (int)indent);
-#endif
- return node;
-}
-
-#endif /* DEBUGGING */
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regexec.c
- */
-
-/*
- * One Ring to rule them all, One Ring to find them
- &
- * [p.v of _The Lord of the Rings_, opening poem]
- * [p.50 of _The Lord of the Rings_, I/iii: "The Shadow of the Past"]
- * [p.254 of _The Lord of the Rings_, II/ii: "The Council of Elrond"]
- */
-
-/* This file contains functions for executing a regular expression. See
- * also regcomp.c which funnily enough, contains functions for compiling
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_exec.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGEXEC_C
-#include "perl.h"
-
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#define RF_tainted 1 /* tainted information used? */
-#define RF_warned 2 /* warned about big count? */
-
-#define RF_utf8 8 /* Pattern contains multibyte chars? */
-
-#define UTF ((PL_reg_flags & RF_utf8) != 0)
-
-#define RS_init 1 /* eval environment created */
-#define RS_set 2 /* replsv value is set */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-#define REGINCLASS(prog,p,c) (ANYOF_FLAGS(p) ? reginclass(prog,p,c,0,0) : ANYOF_BITMAP_TEST(p,*(c)))
-
-/*
- * Forwards.
- */
-
-#define CHR_SVLEN(sv) (do_utf8 ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (PL_reg_match_utf8 ? utf8_distance(a,b) : a - b)
-
-#define HOPc(pos,off) \
- (char *)(PL_reg_match_utf8 \
- ? reghop3((U8*)pos, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)) \
- : (U8*)(pos + off))
-#define HOPBACKc(pos, off) \
- (char*)(PL_reg_match_utf8\
- ? reghopmaybe3((U8*)pos, -off, (U8*)PL_bostr) \
- : (pos - off >= PL_bostr) \
- ? (U8*)pos - off \
- : NULL)
-
-#define HOP3(pos,off,lim) (PL_reg_match_utf8 ? reghop3((U8*)(pos), off, (U8*)(lim)) : (U8*)(pos + off))
-#define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim))
-
-/* these are unrolled below in the CCC_TRY_XXX defined */
-#define LOAD_UTF8_CHARCLASS(class,str) STMT_START { \
- if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)str); assert(ok); LEAVE; } } STMT_END
-#define LOAD_UTF8_CHARCLASS_ALNUM() LOAD_UTF8_CHARCLASS(alnum,"a")
-#define LOAD_UTF8_CHARCLASS_DIGIT() LOAD_UTF8_CHARCLASS(digit,"0")
-#define LOAD_UTF8_CHARCLASS_SPACE() LOAD_UTF8_CHARCLASS(space," ")
-#define LOAD_UTF8_CHARCLASS_MARK() LOAD_UTF8_CHARCLASS(mark, "\xcd\x86")
-
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS_ALNUM()
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS_SPACE()
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS_DIGIT()
-#define RE_utf8_perl_word PL_utf8_alnum
-#define RE_utf8_perl_space PL_utf8_space
-#define RE_utf8_posix_digit PL_utf8_digit
-#define perl_word alnum
-#define perl_space space
-#define posix_digit digit
-#else
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS(perl_word,"a")
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS(perl_space," ")
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS(posix_digit,"0")
-#define RE_utf8_perl_word PL_utf8_perl_word
-#define RE_utf8_perl_space PL_utf8_perl_space
-#define RE_utf8_posix_digit PL_utf8_posix_digit
-#endif
-
-
-#define CCC_TRY_AFF(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME: \
- if (!nextchr) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if (!(OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if (!(OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-#define CCC_TRY_NEG(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME : \
- if (!nextchr && locinput >= PL_regeol) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if ((OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if ((OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-
-
-
-
-/* TODO: Combine JUMPABLE and HAS_TEXT to cache OP(rn) */
-
-/* for use after a quantifier and before an EXACT-like node -- japhy */
-/* it would be nice to rework regcomp.sym to generate this stuff. sigh */
-#define JUMPABLE(rn) ( \
- OP(rn) == OPEN || \
- (OP(rn) == CLOSE && (!cur_eval || cur_eval->u.eval.close_paren != ARG(rn))) || \
- OP(rn) == EVAL || \
- OP(rn) == SUSPEND || OP(rn) == IFMATCH || \
- OP(rn) == PLUS || OP(rn) == MINMOD || \
- OP(rn) == KEEPS || (PL_regkind[OP(rn)] == VERB) || \
- (PL_regkind[OP(rn)] == CURLY && ARG1(rn) > 0) \
-)
-#define IS_EXACT(rn) (PL_regkind[OP(rn)] == EXACT)
-
-#define HAS_TEXT(rn) ( IS_EXACT(rn) || PL_regkind[OP(rn)] == REF )
-
-#if 0
-/* Currently these are only used when PL_regkind[OP(rn)] == EXACT so
- we don't need this definition. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT || OP(rn)==REF || OP(rn)==NREF )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF || OP(rn)==REFF || OP(rn)==NREFF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL || OP(rn)==REFFL || OP(rn)==NREFFL )
-
-#else
-/* ... so we use this as its faster. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL )
-
-#endif
-
-/*
- Search for mandatory following text node; for lookahead, the text must
- follow but for lookbehind (rn->flags != 0) we skip to the next step.
-*/
-#define FIND_NEXT_IMPT(rn) STMT_START { \
- while (JUMPABLE(rn)) { \
- const OPCODE type = OP(rn); \
- if (type == SUSPEND || PL_regkind[type] == CURLY) \
- rn = NEXTOPER(NEXTOPER(rn)); \
- else if (type == PLUS) \
- rn = NEXTOPER(rn); \
- else if (type == IFMATCH) \
- rn = (rn->flags == 0) ? NEXTOPER(NEXTOPER(rn)) : rn + ARG(rn); \
- else rn += NEXT_OFF(rn); \
- } \
-} STMT_END
-
-
-static void restore_pos(pTHX_ void *arg);
-
-STATIC CHECKPOINT
-S_regcppush(pTHX_ I32 parenfloor)
-{
- dVAR;
- const int retval = PL_savestack_ix;
-#define REGCP_PAREN_ELEMS 4
- const int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS;
- int p;
- GET_RE_DEBUG_FLAGS_DECL;
-
- if (paren_elems_to_push < 0)
- Perl_croak(aTHX_ "panic: paren_elems_to_push < 0");
-
-#define REGCP_OTHER_ELEMS 7
- SSGROW(paren_elems_to_push + REGCP_OTHER_ELEMS);
-
- for (p = PL_regsize; p > parenfloor; p--) {
-/* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */
- SSPUSHINT(PL_regoffs[p].end);
- SSPUSHINT(PL_regoffs[p].start);
- SSPUSHPTR(PL_reg_start_tmp[p]);
- SSPUSHINT(p);
- DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log,
- " saving \\%"UVuf" %"IVdf"(%"IVdf")..%"IVdf"\n",
- (UV)p, (IV)PL_regoffs[p].start,
- (IV)(PL_reg_start_tmp[p] - PL_bostr),
- (IV)PL_regoffs[p].end
- ));
- }
-/* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */
- SSPUSHPTR(PL_regoffs);
- SSPUSHINT(PL_regsize);
- SSPUSHINT(*PL_reglastparen);
- SSPUSHINT(*PL_reglastcloseparen);
- SSPUSHPTR(PL_reginput);
-#define REGCP_FRAME_ELEMS 2
-/* REGCP_FRAME_ELEMS are part of the REGCP_OTHER_ELEMS and
- * are needed for the regexp context stack bookkeeping. */
- SSPUSHINT(paren_elems_to_push + REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- SSPUSHINT(SAVEt_REGCONTEXT); /* Magic cookie. */
-
- return retval;
-}
-
-/* These are needed since we do not localize EVAL nodes: */
-#define REGCP_SET(cp) \
- DEBUG_STATE_r( \
- PerlIO_printf(Perl_debug_log, \
- " Setting an EVAL scope, savestack=%"IVdf"\n", \
- (IV)PL_savestack_ix)); \
- cp = PL_savestack_ix
-
-#define REGCP_UNWIND(cp) \
- DEBUG_STATE_r( \
- if (cp != PL_savestack_ix) \
- PerlIO_printf(Perl_debug_log, \
- " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \
- (IV)(cp), (IV)PL_savestack_ix)); \
- regcpblow(cp)
-
-STATIC char *
-S_regcppop(pTHX_ const regexp *rex)
-{
- dVAR;
- U32 i;
- char *input;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCPPOP;
-
- /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */
- i = SSPOPINT;
- assert(i == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */
- i = SSPOPINT; /* Parentheses elements to pop. */
- input = (char *) SSPOPPTR;
- *PL_reglastcloseparen = SSPOPINT;
- *PL_reglastparen = SSPOPINT;
- PL_regsize = SSPOPINT;
- PL_regoffs=(regexp_paren_pair *) SSPOPPTR;
-
-
- /* Now restore the parentheses context. */
- for (i -= (REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- i > 0; i -= REGCP_PAREN_ELEMS) {
- I32 tmps;
- U32 paren = (U32)SSPOPINT;
- PL_reg_start_tmp[paren] = (char *) SSPOPPTR;
- PL_regoffs[paren].start = SSPOPINT;
- tmps = SSPOPINT;
- if (paren <= *PL_reglastparen)
- PL_regoffs[paren].end = tmps;
- DEBUG_BUFFERS_r(
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n",
- (UV)paren, (IV)PL_regoffs[paren].start,
- (IV)(PL_reg_start_tmp[paren] - PL_bostr),
- (IV)PL_regoffs[paren].end,
- (paren > *PL_reglastparen ? "(no)" : ""));
- );
- }
- DEBUG_BUFFERS_r(
- if (*PL_reglastparen + 1 <= rex->nparens) {
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"IVdf"..\\%"IVdf" to undef\n",
- (IV)(*PL_reglastparen + 1), (IV)rex->nparens);
- }
- );
-#if 1
- /* It would seem that the similar code in regtry()
- * already takes care of this, and in fact it is in
- * a better location to since this code can #if 0-ed out
- * but the code in regtry() is needed or otherwise tests
- * requiring null fields (pat.t#187 and split.t#{13,14}
- * (as of patchlevel 7877) will fail. Then again,
- * this code seems to be necessary or otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * --jhi updated by dapm */
- for (i = *PL_reglastparen + 1; i <= rex->nparens; i++) {
- if (i > PL_regsize)
- PL_regoffs[i].start = -1;
- PL_regoffs[i].end = -1;
- }
-#endif
- return input;
-}
-
-#define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */
-
-/*
- * pregexec and friends
- */
-
-#ifndef PERL_IN_XSUB_RE
-/*
- - pregexec - match a regexp against a string
- */
-I32
-Perl_pregexec(pTHX_ REGEXP * const prog, char* stringarg, register char *strend,
- char *strbeg, I32 minend, SV *screamer, U32 nosave)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* nosave: For optimizations. */
-{
- PERL_ARGS_ASSERT_PREGEXEC;
-
- return
- regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL,
- nosave ? 0 : REXEC_COPY_STR);
-}
-#endif
-
-/*
- * Need to implement the following flags for reg_anch:
- *
- * USE_INTUIT_NOML - Useful to call re_intuit_start() first
- * USE_INTUIT_ML
- * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer
- * INTUIT_AUTORITATIVE_ML
- * INTUIT_ONCE_NOML - Intuit can match in one location only.
- * INTUIT_ONCE_ML
- *
- * Another flag for this function: SECOND_TIME (so that float substrs
- * with giant delta may be not rechecked).
- */
-
-/* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */
-
-/* If SCREAM, then SvPVX_const(sv) should be compatible with strpos and strend.
- Otherwise, only SvCUR(sv) is used to get strbeg. */
-
-/* XXXX We assume that strpos is strbeg unless sv. */
-
-/* XXXX Some places assume that there is a fixed substring.
- An update may be needed if optimizer marks as "INTUITable"
- RExen without fixed substrings. Similarly, it is assumed that
- lengths of all the strings are no more than minlen, thus they
- cannot come from lookahead.
- (Or minlen should take into account lookahead.)
- NOTE: Some of this comment is not correct. minlen does now take account
- of lookahead/behind. Further research is required. -- demerphq
-
-*/
-
-/* A failure to find a constant substring means that there is no need to make
- an expensive call to REx engine, thus we celebrate a failure. Similarly,
- finding a substring too deep into the string means that less calls to
- regtry() should be needed.
-
- REx compiler's optimizer found 4 possible hints:
- a) Anchored substring;
- b) Fixed substring;
- c) Whether we are anchored (beginning-of-line or \G);
- d) First node (of those at offset 0) which may distingush positions;
- We use a)b)d) and multiline-part of c), and try to find a position in the
- string which does not contradict any of them.
- */
-
-/* Most of decisions we do here should have been done at compile time.
- The nodes of the REx which we used for the search should have been
- deleted from the finite automaton. */
-
-char *
-Perl_re_intuit_start(pTHX_ REGEXP * const rx, SV *sv, char *strpos,
- char *strend, const U32 flags, re_scream_pos_data *data)
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- register I32 start_shift = 0;
- /* Should be nonnegative! */
- register I32 end_shift = 0;
- register char *s;
- register SV *check;
- char *strbeg;
- char *t;
- const bool do_utf8 = (sv && SvUTF8(sv)) ? 1 : 0; /* if no sv we have to assume bytes */
- I32 ml_anch;
- register char *other_last = NULL; /* other substr checked before this */
- char *check_at = NULL; /* check substr found at this pos */
- const I32 multiline = prog->extflags & RXf_PMf_MULTILINE;
- RXi_GET_DECL(prog,progi);
-#ifdef DEBUGGING
- const char * const i_strpos = strpos;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_START;
-
- RX_MATCH_UTF8_set(rx,do_utf8);
-
- if (RX_UTF8(rx)) {
- PL_reg_flags |= RF_utf8;
- }
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, strpos, strend,
- sv ? "Guessing start of match in sv for"
- : "Guessing start of match in string for");
- );
-
- /* CHR_DIST() would be more correct here but it makes things slow. */
- if (prog->minlen > strend - strpos) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short... [re_intuit_start]\n"));
- goto fail;
- }
-
- strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos;
- PL_regeol = strend;
- if (do_utf8) {
- if (!prog->check_utf8 && prog->check_substr)
- to_utf8_substr(prog);
- check = prog->check_utf8;
- } else {
- if (!prog->check_substr && prog->check_utf8)
- to_byte_substr(prog);
- check = prog->check_substr;
- }
- if (check == &PL_sv_undef) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Non-utf8 string cannot match utf8 check string\n"));
- goto fail;
- }
- if (prog->extflags & RXf_ANCH) { /* Match at beg-of-str or after \n */
- ml_anch = !( (prog->extflags & RXf_ANCH_SINGLE)
- || ( (prog->extflags & RXf_ANCH_BOL)
- && !multiline ) ); /* Check after \n? */
-
- if (!ml_anch) {
- if ( !(prog->extflags & RXf_ANCH_GPOS) /* Checked by the caller */
- && !(prog->intflags & PREGf_IMPLICIT) /* not a real BOL */
- /* SvCUR is not set on references: SvRV and SvPVX_const overlap */
- && sv && !SvROK(sv)
- && (strpos != strbeg)) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not at start...\n"));
- goto fail;
- }
- if (prog->check_offset_min == prog->check_offset_max &&
- !(prog->extflags & RXf_CANY_SEEN)) {
- /* Substring at constant offset from beg-of-str... */
- I32 slen;
-
- s = HOP3c(strpos, prog->check_offset_min, strend);
-
- if (SvTAIL(check)) {
- slen = SvCUR(check); /* >= 1 */
-
- if ( strend - s > slen || strend - s < slen - 1
- || (strend - s == slen && strend[-1] != '\n')) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String too long...\n"));
- goto fail_finish;
- }
- /* Now should match s[0..slen-2] */
- slen--;
- if (slen && (*SvPVX_const(check) != *s
- || (slen > 1
- && memNE(SvPVX_const(check), s, slen)))) {
- report_neq:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String not equal...\n"));
- goto fail_finish;
- }
- }
- else if (*SvPVX_const(check) != *s
- || ((slen = SvCUR(check)) > 1
- && memNE(SvPVX_const(check), s, slen)))
- goto report_neq;
- check_at = s;
- goto success_at_start;
- }
- }
- /* Match is anchored, but substr is not anchored wrt beg-of-str. */
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- if (!ml_anch) {
- const I32 end = prog->check_offset_max + CHR_SVLEN(check)
- - (SvTAIL(check) != 0);
- const I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end;
-
- if (end_shift < eshift)
- end_shift = eshift;
- }
- }
- else { /* Can match at random position */
- ml_anch = 0;
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- /* end shift should be non negative here */
- }
-
-#ifdef QDEBUGGING /* 7/99: reports of failure (with the older version) */
- if (end_shift < 0)
- Perl_croak(aTHX_ "panic: end_shift: %"IVdf" pattern:\n%s\n ",
- (IV)end_shift, RX_PRECOMP(prog));
-#endif
-
- restart:
- /* Find a possible match in the region s..strend by looking for
- the "check" substring in the region corrected by start/end_shift. */
-
- {
- I32 srch_start_shift = start_shift;
- I32 srch_end_shift = end_shift;
- if (srch_start_shift < 0 && strbeg - s > srch_start_shift) {
- srch_end_shift -= ((strbeg - s) - srch_start_shift);
- srch_start_shift = strbeg - s;
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "Check offset min: %"IVdf" Start shift: %"IVdf" End shift %"IVdf" Real End Shift: %"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)srch_start_shift,
- (IV)srch_end_shift,
- (IV)prog->check_end_shift);
- });
-
- if (flags & REXEC_SCREAM) {
- I32 p = -1; /* Internal iterator of scream. */
- I32 * const pp = data ? data->scream_pos : &p;
-
- if (PL_screamfirst[BmRARE(check)] >= 0
- || ( BmRARE(check) == '\n'
- && (BmPREVIOUS(check) == SvCUR(check) - 1)
- && SvTAIL(check) ))
- s = screaminstr(sv, check,
- srch_start_shift + (s - strbeg), srch_end_shift, pp, 0);
- else
- goto fail_finish;
- /* we may be pointing at the wrong string */
- if (s && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- if (data)
- *data->scream_olds = s;
- }
- else {
- U8* start_point;
- U8* end_point;
- if (prog->extflags & RXf_CANY_SEEN) {
- start_point= (U8*)(s + srch_start_shift);
- end_point= (U8*)(strend - srch_end_shift);
- } else {
- start_point= HOP3(s, srch_start_shift, srch_start_shift < 0 ? strbeg : strend);
- end_point= HOP3(strend, -srch_end_shift, strbeg);
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "fbm_instr len=%d str=<%.*s>\n",
- (int)(end_point - start_point),
- (int)(end_point - start_point) > 20 ? 20 : (int)(end_point - start_point),
- start_point);
- });
-
- s = fbm_instr( start_point, end_point,
- check, multiline ? FBMrf_MULTILINE : 0);
- }
- }
- /* Update the count-of-usability, remove useless subpatterns,
- unshift s. */
-
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(check), RE_SV_DUMPLEN(check), 30);
- PerlIO_printf(Perl_debug_log, "%s %s substr %s%s%s",
- (s ? "Found" : "Did not find"),
- (check == (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)
- ? "anchored" : "floating"),
- quoted,
- RE_SV_TAIL(check),
- (s ? " at offset " : "...\n") );
- });
-
- if (!s)
- goto fail_finish;
- /* Finish the diagnostic message */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) );
-
- /* XXX dmq: first branch is for positive lookbehind...
- Our check string is offset from the beginning of the pattern.
- So we need to do any stclass tests offset forward from that
- point. I think. :-(
- */
-
-
-
- check_at=s;
-
-
- /* Got a candidate. Check MBOL anchoring, and the *other* substr.
- Start with the other substr.
- XXXX no SCREAM optimization yet - and a very coarse implementation
- XXXX /ttx+/ results in anchored="ttx", floating="x". floating will
- *always* match. Probably should be marked during compile...
- Probably it is right to do no SCREAM here...
- */
-
- if (do_utf8 ? (prog->float_utf8 && prog->anchored_utf8)
- : (prog->float_substr && prog->anchored_substr))
- {
- /* Take into account the "other" substring. */
- /* XXXX May be hopelessly wrong for UTF... */
- if (!other_last)
- other_last = strpos;
- if (check == (do_utf8 ? prog->float_utf8 : prog->float_substr)) {
- do_other_anchored:
- {
- char * const last = HOP3c(s, -start_shift, strbeg);
- char *last1, *last2;
- char * const saved_s = s;
- SV* must;
-
- t = s - prog->check_offset_max;
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -(prog->check_offset_max), (U8*)strpos))
- && t > strpos)))
- NOOP;
- else
- t = strpos;
- t = HOP3c(t, prog->anchored_offset, strend);
- if (t < other_last) /* These positions already checked */
- t = other_last;
- last2 = last1 = HOP3c(strend, -prog->minlen, strbeg);
- if (last < last1)
- last1 = last;
- /* XXXX It is not documented what units *_offsets are in.
- We assume bytes, but this is clearly wrong.
- Meaning this code needs to be carefully reviewed for errors.
- dmq.
- */
-
- /* On end-of-str: see comment below. */
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->anchored_utf8); /* for debug */
- }
- else
- s = fbm_instr(
- (unsigned char*)t,
- HOP3(HOP3(last1, prog->anchored_offset, strend)
- + SvCUR(must), -(SvTAIL(must)!=0), strbeg),
- must,
- multiline ? FBMrf_MULTILINE : 0
- );
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s anchored substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
-
-
- if (!s) {
- if (last1 >= last2) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying floating at offset %ld...\n",
- (long)(HOP3c(saved_s, 1, strend) - i_strpos)));
- other_last = HOP3c(last1, prog->anchored_offset+1, strend);
- s = HOP3c(last, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- t = HOP3c(s, -prog->anchored_offset, strbeg);
- other_last = HOP3c(s, 1, strend);
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
- else { /* Take into account the floating substring. */
- char *last, *last1;
- char * const saved_s = s;
- SV* must;
-
- t = HOP3c(s, -start_shift, strbeg);
- last1 = last =
- HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg);
- if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset)
- last = HOP3c(t, prog->float_max_offset, strend);
- s = HOP3c(t, prog->float_min_offset, strend);
- if (s < other_last)
- s = other_last;
- /* XXXX It is not documented what units *_offsets are in. Assume bytes. */
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- /* fbm_instr() takes into account exact value of end-of-str
- if the check is SvTAIL(ed). Since false positives are OK,
- and end-of-str is not later than strend we are OK. */
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->float_utf8); /* for debug message */
- }
- else
- s = fbm_instr((unsigned char*)s,
- (unsigned char*)last + SvCUR(must)
- - (SvTAIL(must)!=0),
- must, multiline ? FBMrf_MULTILINE : 0);
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s floating substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
- if (!s) {
- if (last1 == last) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying anchored starting at offset %ld...\n",
- (long)(saved_s + 1 - i_strpos)));
- other_last = last;
- s = HOP3c(t, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- other_last = s; /* Fix this later. --Hugo */
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
-
-
- t= (char*)HOP3( s, -prog->check_offset_max, (prog->check_offset_max<0) ? strend : strpos);
-
- DEBUG_OPTIMISE_MORE_r(
- PerlIO_printf(Perl_debug_log,
- "Check offset min:%"IVdf" max:%"IVdf" S:%"IVdf" t:%"IVdf" D:%"IVdf" end:%"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)prog->check_offset_max,
- (IV)(s-strpos),
- (IV)(t-strpos),
- (IV)(t-s),
- (IV)(strend-strpos)
- )
- );
-
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -prog->check_offset_max, (U8*) ((prog->check_offset_max<0) ? strend : strpos)))
- && t > strpos)))
- {
- /* Fixed substring is found far enough so that the match
- cannot start at strpos. */
- try_at_offset:
- if (ml_anch && t[-1] != '\n') {
- /* Eventually fbm_*() should handle this, but often
- anchored_offset is not 0, so this check will not be wasted. */
- /* XXXX In the code below we prefer to look for "^" even in
- presence of anchored substrings. And we search even
- beyond the found float position. These pessimizations
- are historical artefacts only. */
- find_anchor:
- while (t < strend - prog->minlen) {
- if (*t == '\n') {
- if (t < check_at - prog->check_offset_min) {
- if (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) {
- /* Since we moved from the found position,
- we definitely contradict the found anchored
- substr. Due to the above check we do not
- contradict "check" substr.
- Thus we can arrive here only if check substr
- is float. Redo checking for "other"=="fixed".
- */
- strpos = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset)));
- goto do_other_anchored;
- }
- /* We don't contradict the found floating substring. */
- /* XXXX Why not check for STCLASS? */
- s = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(s - i_strpos)));
- goto set_useful;
- }
- /* Position contradicts check-string */
- /* XXXX probably better to look for check-string
- than for "\n", so one should lower the limit for t? */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t + 1 - i_strpos)));
- other_last = strpos = s = t + 1;
- goto restart;
- }
- t++;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- goto fail_finish;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- }
- s = t;
- set_useful:
- ++BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr); /* hooray/5 */
- }
- else {
- /* The found string does not prohibit matching at strpos,
- - no optimization of calling REx engine can be performed,
- unless it was an MBOL and we are not after MBOL,
- or a future STCLASS check will fail this. */
- try_at_start:
- /* Even in this situation we may use MBOL flag if strpos is offset
- wrt the start of the string. */
- if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */
- && (strpos != strbeg) && strpos[-1] != '\n'
- /* May be due to an implicit anchor of m{.*foo} */
- && !(prog->intflags & PREGf_IMPLICIT))
- {
- t = strpos;
- goto find_anchor;
- }
- DEBUG_EXECUTE_r( if (ml_anch)
- PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n",
- (long)(strpos - i_strpos), PL_colors[0], PL_colors[1]);
- );
- success_at_start:
- if (!(prog->intflags & PREGf_NAUGHTY) /* XXXX If strpos moved? */
- && (do_utf8 ? (
- prog->check_utf8 /* Could be deleted already */
- && --BmUSEFUL(prog->check_utf8) < 0
- && (prog->check_utf8 == prog->float_utf8)
- ) : (
- prog->check_substr /* Could be deleted already */
- && --BmUSEFUL(prog->check_substr) < 0
- && (prog->check_substr == prog->float_substr)
- )))
- {
- /* If flags & SOMETHING - do not do it many times on the same match */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n"));
- SvREFCNT_dec(do_utf8 ? prog->check_utf8 : prog->check_substr);
- if (do_utf8 ? prog->check_substr : prog->check_utf8)
- SvREFCNT_dec(do_utf8 ? prog->check_substr : prog->check_utf8);
- prog->check_substr = prog->check_utf8 = NULL; /* disable */
- prog->float_substr = prog->float_utf8 = NULL; /* clear */
- check = NULL; /* abort */
- s = strpos;
- /* XXXX This is a remnant of the old implementation. It
- looks wasteful, since now INTUIT can use many
- other heuristics. */
- prog->extflags &= ~RXf_USE_INTUIT;
- }
- else
- s = strpos;
- }
-
- /* Last resort... */
- /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */
- /* trie stclasses are too expensive to use here, we are better off to
- leave it to regmatch itself */
- if (progi->regstclass && PL_regkind[OP(progi->regstclass)]!=TRIE) {
- /* minlen == 0 is possible if regstclass is \b or \B,
- and the fixed substr is ''$.
- Since minlen is already taken into account, s+1 is before strend;
- accidentally, minlen >= 1 guaranties no false positives at s + 1
- even for \b or \B. But (minlen? 1 : 0) below assumes that
- regstclass does not come from lookahead... */
- /* If regstclass takes bytelength more than 1: If charlength==1, OK.
- This leaves EXACTF only, which is dealt with in find_byclass(). */
- const U8* const str = (U8*)STRING(progi->regstclass);
- const int cl_l = (PL_regkind[OP(progi->regstclass)] == EXACT
- ? CHR_DIST(str+STR_LEN(progi->regstclass), str)
- : 1);
- char * endpos;
- if (prog->anchored_substr || prog->anchored_utf8 || ml_anch)
- endpos= HOP3c(s, (prog->minlen ? cl_l : 0), strend);
- else if (prog->float_substr || prog->float_utf8)
- endpos= HOP3c(HOP3c(check_at, -start_shift, strbeg), cl_l, strend);
- else
- endpos= strend;
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %"IVdf" s: %"IVdf" endpos: %"IVdf"\n",
- (IV)start_shift, (IV)(check_at - strbeg), (IV)(s - strbeg), (IV)(endpos - strbeg)));
-
- t = s;
- s = find_byclass(prog, progi->regstclass, s, endpos, NULL);
- if (!s) {
-#ifdef DEBUGGING
- const char *what = NULL;
-#endif
- if (endpos == strend) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "This position contradicts STCLASS...\n") );
- if ((prog->extflags & RXf_ANCH) && !ml_anch)
- goto fail;
- /* Contradict one of substrings */
- if (prog->anchored_substr || prog->anchored_utf8) {
- if ((do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) == check) {
- DEBUG_EXECUTE_r( what = "anchored" );
- hop_and_restart:
- s = HOP3c(t, 1, strend);
- if (s + start_shift + end_shift > strend) {
- /* XXXX Should be taken into account earlier? */
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for %s substr starting at offset %ld...\n",
- what, (long)(s + start_shift - i_strpos)) );
- goto restart;
- }
- /* Have both, check_string is floating */
- if (t + start_shift >= check_at) /* Contradicts floating=check */
- goto retry_floating_check;
- /* Recheck anchored substring, but not floating... */
- s = check_at;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for anchored substr starting at offset %ld...\n",
- (long)(other_last - i_strpos)) );
- goto do_other_anchored;
- }
- /* Another way we could have checked stclass at the
- current position only: */
- if (ml_anch) {
- s = t = t + 1;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for /%s^%s/m starting at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t - i_strpos)) );
- goto try_at_offset;
- }
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) /* Could have been deleted */
- goto fail;
- /* Check is floating subtring. */
- retry_floating_check:
- t = check_at - start_shift;
- DEBUG_EXECUTE_r( what = "floating" );
- goto hop_and_restart;
- }
- if (t != s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "By STCLASS: moving %ld --> %ld\n",
- (long)(t - i_strpos), (long)(s - i_strpos))
- );
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Does not contradict STCLASS...\n");
- );
- }
- }
- giveup:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n",
- PL_colors[4], (check ? "Guessed" : "Giving up"),
- PL_colors[5], (long)(s - i_strpos)) );
- return s;
-
- fail_finish: /* Substring not found */
- if (prog->check_substr || prog->check_utf8) /* could be removed already */
- BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr) += 5; /* hooray */
- fail:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n",
- PL_colors[4], PL_colors[5]));
- return NULL;
-}
-
-#define DECL_TRIE_TYPE(scan) \
- const enum { trie_plain, trie_utf8, trie_utf8_fold, trie_latin_utf8_fold } \
- trie_type = (scan->flags != EXACT) \
- ? (do_utf8 ? trie_utf8_fold : (UTF ? trie_latin_utf8_fold : trie_plain)) \
- : (do_utf8 ? trie_utf8 : trie_plain)
-
-#define REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, uscan, len, \
-uvc, charid, foldlen, foldbuf, uniflags) STMT_START { \
- UV uvc_unfolded = 0; \
- switch (trie_type) { \
- case trie_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc_unfolded = uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- uvc_unfolded = uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_latin_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- len = 1; \
- uvc = to_uni_fold( *(U8*)uc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_utf8: \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- break; \
- case trie_plain: \
- uvc = (UV)*uc; \
- len = 1; \
- } \
- \
- if (uvc < 256) { \
- charid = trie->charmap[ uvc ]; \
- } \
- else { \
- charid = 0; \
- if (widecharmap) { \
- SV** const svpp = hv_fetch(widecharmap, \
- (char*)&uvc, sizeof(UV), 0); \
- if (svpp) \
- charid = (U16)SvIV(*svpp); \
- } \
- } \
- if (!charid && trie_type == trie_utf8_fold && !UTF) { \
- charid = trie->charmap[uvc_unfolded]; \
- } \
-} STMT_END
-
-#define REXEC_FBC_EXACTISH_CHECK(CoNd) \
-{ \
- char *my_strend= (char *)strend; \
- if ( (CoNd) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8, \
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- else { \
- U8 foldbuf[UTF8_MAXBYTES_CASE+1]; \
- uvchr_to_utf8(tmpbuf, c); \
- f = to_utf8_fold(tmpbuf, foldbuf, &foldlen); \
- if ( f != c \
- && (f == c1 || f == c2) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8,\
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- } \
-} \
-s += len
-
-#define REXEC_FBC_EXACTISH_SCAN(CoNd) \
-STMT_START { \
- while (s <= e) { \
- if ( (CoNd) \
- && (ln == 1 || !(OP(c) == EXACTF \
- ? ibcmp(s, m, ln) \
- : ibcmp_locale(s, m, ln))) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_SCAN(CoDe) \
-STMT_START { \
- while (s + (uskip = UTF8SKIP(s)) <= strend) { \
- CoDe \
- s += uskip; \
- } \
-} STMT_END
-
-#define REXEC_FBC_SCAN(CoDe) \
-STMT_START { \
- while (s < strend) { \
- CoDe \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_CLASS_SCAN(CoNd) \
-REXEC_FBC_UTF8_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_CLASS_SCAN(CoNd) \
-REXEC_FBC_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_TRYIT \
-if ((!reginfo || regtry(reginfo, &s))) \
- goto got_it
-
-#define REXEC_FBC_CSCAN(CoNdUtF8,CoNd) \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_PRELOAD(UtFpReLoAd,CoNdUtF8,CoNd) \
- if (do_utf8) { \
- UtFpReLoAd; \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_TAINT(CoNdUtF8,CoNd) \
- PL_reg_flags |= RF_tainted; \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define DUMP_EXEC_POS(li,s,doutf8) \
- dump_exec_pos(li,s,(PL_regeol),(PL_bostr),(PL_reg_starttry),doutf8)
-
-/* We know what class REx starts with. Try to find this position... */
-/* if reginfo is NULL, its a dryrun */
-/* annoyingly all the vars in this routine have different names from their counterparts
- in regmatch. /grrr */
-
-STATIC char *
-S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
- const char *strend, regmatch_info *reginfo)
-{
- dVAR;
- const I32 doevery = (prog->intflags & PREGf_SKIP) == 0;
- char *m;
- STRLEN ln;
- STRLEN lnc;
- register STRLEN uskip;
- unsigned int c1;
- unsigned int c2;
- char *e;
- register I32 tmp = 1; /* Scratch variable? */
- register const bool do_utf8 = PL_reg_match_utf8;
- RXi_GET_DECL(prog,progi);
-
- PERL_ARGS_ASSERT_FIND_BYCLASS;
-
- /* We know what class it must start with. */
- switch (OP(c)) {
- case ANYOF:
- if (do_utf8) {
- REXEC_FBC_UTF8_CLASS_SCAN((ANYOF_FLAGS(c) & ANYOF_UNICODE) ||
- !UTF8_IS_INVARIANT((U8)s[0]) ?
- reginclass(prog, c, (U8*)s, 0, do_utf8) :
- REGINCLASS(prog, c, (U8*)s));
- }
- else {
- while (s < strend) {
- STRLEN skip = 1;
-
- if (REGINCLASS(prog, c, (U8*)s) ||
- (ANYOF_FOLD_SHARP_S(c, s, strend) &&
- /* The assignment of 2 is intentional:
- * for the folded sharp s, the skip is 2. */
- (skip = SHARP_S_SKIP))) {
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += skip;
- }
- }
- break;
- case CANY:
- REXEC_FBC_SCAN(
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- );
- break;
- case EXACTF:
- m = STRING(c);
- ln = STR_LEN(c); /* length to match in octets/bytes */
- lnc = (I32) ln; /* length to match in characters */
- if (UTF) {
- STRLEN ulen1, ulen2;
- U8 *sm = (U8 *) m;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
- /* used by commented-out code below */
- /*const U32 uniflags = UTF8_ALLOW_DEFAULT;*/
-
- /* XXX: Since the node will be case folded at compile
- time this logic is a little odd, although im not
- sure that its actually wrong. --dmq */
-
- c1 = to_utf8_lower((U8*)m, tmpbuf1, &ulen1);
- c2 = to_utf8_upper((U8*)m, tmpbuf2, &ulen2);
-
- /* XXX: This is kinda strange. to_utf8_XYZ returns the
- codepoint of the first character in the converted
- form, yet originally we did the extra step.
- No tests fail by commenting this code out however
- so Ive left it out. -- dmq.
-
- c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- */
-
- lnc = 0;
- while (sm < ((U8 *) m + ln)) {
- lnc++;
- sm += UTF8SKIP(sm);
- }
- }
- else {
- c1 = *(U8*)m;
- c2 = PL_fold[c1];
- }
- goto do_exactf;
- case EXACTFL:
- m = STRING(c);
- ln = STR_LEN(c);
- lnc = (I32) ln;
- c1 = *(U8*)m;
- c2 = PL_fold_locale[c1];
- do_exactf:
- e = HOP3c(strend, -((I32)lnc), s);
-
- if (!reginfo && e < s)
- e = s; /* Due to minlen logic of intuit() */
-
- /* The idea in the EXACTF* cases is to first find the
- * first character of the EXACTF* node and then, if
- * necessary, case-insensitively compare the full
- * text of the node. The c1 and c2 are the first
- * characters (though in Unicode it gets a bit
- * more complicated because there are more cases
- * than just upper and lower: one needs to use
- * the so-called folding case for case-insensitive
- * matching (called "loose matching" in Unicode).
- * ibcmp_utf8() will do just that. */
-
- if (do_utf8 || UTF) {
- UV c, f;
- U8 tmpbuf [UTF8_MAXBYTES+1];
- STRLEN len = 1;
- STRLEN foldlen;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- if (c1 == c2) {
- /* Upper and lower of 1st char are equal -
- * probably not a "letter". */
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
- REXEC_FBC_EXACTISH_CHECK(c == c1);
- }
- }
- else {
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
-
- /* Handle some of the three Greek sigmas cases.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (the character class or ANYOF cases)
- * are handled during compiletime in
- * regexec.c:S_regclass(). */
- if (c == (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA ||
- c == (UV)UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA)
- c = (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA;
-
- REXEC_FBC_EXACTISH_CHECK(c == c1 || c == c2);
- }
- }
- }
- else {
- /* Neither pattern nor string are UTF8 */
- if (c1 == c2)
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1);
- else
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1 || *(U8*)s == c2);
- }
- break;
- case BOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == BOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == BOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- if ((!prog->minlen && tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NBOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == NBOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == NBOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == NBOUND ?
- isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- if ((!prog->minlen && !tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case ALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- isALNUM(*s)
- );
- case ALNUML:
- REXEC_FBC_CSCAN_TAINT(
- isALNUM_LC_utf8((U8*)s),
- isALNUM_LC(*s)
- );
- case NALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- !swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- !isALNUM(*s)
- );
- case NALNUML:
- REXEC_FBC_CSCAN_TAINT(
- !isALNUM_LC_utf8((U8*)s),
- !isALNUM_LC(*s)
- );
- case SPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- *s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8),
- isSPACE(*s)
- );
- case SPACEL:
- REXEC_FBC_CSCAN_TAINT(
- *s == ' ' || isSPACE_LC_utf8((U8*)s),
- isSPACE_LC(*s)
- );
- case NSPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- !(*s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8)),
- !isSPACE(*s)
- );
- case NSPACEL:
- REXEC_FBC_CSCAN_TAINT(
- !(*s == ' ' || isSPACE_LC_utf8((U8*)s)),
- !isSPACE_LC(*s)
- );
- case DIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- isDIGIT(*s)
- );
- case DIGITL:
- REXEC_FBC_CSCAN_TAINT(
- isDIGIT_LC_utf8((U8*)s),
- isDIGIT_LC(*s)
- );
- case NDIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- !swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- !isDIGIT(*s)
- );
- case NDIGITL:
- REXEC_FBC_CSCAN_TAINT(
- !isDIGIT_LC_utf8((U8*)s),
- !isDIGIT_LC(*s)
- );
- case LNBREAK:
- REXEC_FBC_CSCAN(
- is_LNBREAK_utf8(s),
- is_LNBREAK_latin1(s)
- );
- case VERTWS:
- REXEC_FBC_CSCAN(
- is_VERTWS_utf8(s),
- is_VERTWS_latin1(s)
- );
- case NVERTWS:
- REXEC_FBC_CSCAN(
- !is_VERTWS_utf8(s),
- !is_VERTWS_latin1(s)
- );
- case HORIZWS:
- REXEC_FBC_CSCAN(
- is_HORIZWS_utf8(s),
- is_HORIZWS_latin1(s)
- );
- case NHORIZWS:
- REXEC_FBC_CSCAN(
- !is_HORIZWS_utf8(s),
- !is_HORIZWS_latin1(s)
- );
- case AHOCORASICKC:
- case AHOCORASICK:
- {
- DECL_TRIE_TYPE(c);
- /* what trie are we using right now */
- reg_ac_data *aho
- = (reg_ac_data*)progi->data->data[ ARG( c ) ];
- reg_trie_data *trie
- = (reg_trie_data*)progi->data->data[ aho->trie ];
- HV *widecharmap = MUTABLE_HV(progi->data->data[ aho->trie + 1 ]);
-
- const char *last_start = strend - trie->minlen;
-#ifdef DEBUGGING
- const char *real_start = s;
-#endif
- STRLEN maxlen = trie->maxlen;
- SV *sv_points;
- U8 **points; /* map of where we were in the input string
- when reading a given char. For ASCII this
- is unnecessary overhead as the relationship
- is always 1:1, but for Unicode, especially
- case folded Unicode this is not true. */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- U8 *bitmap=NULL;
-
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- /* We can't just allocate points here. We need to wrap it in
- * an SV so it gets freed properly if there is a croak while
- * running the match */
- ENTER;
- SAVETMPS;
- sv_points=newSV(maxlen * sizeof(U8 *));
- SvCUR_set(sv_points,
- maxlen * sizeof(U8 *));
- SvPOK_on(sv_points);
- sv_2mortal(sv_points);
- points=(U8**)SvPV_nolen(sv_points );
- if ( trie_type != trie_utf8_fold
- && (trie->bitmap || OP(c)==AHOCORASICKC) )
- {
- if (trie->bitmap)
- bitmap=(U8*)trie->bitmap;
- else
- bitmap=(U8*)ANYOF_BITMAP(c);
- }
- /* this is the Aho-Corasick algorithm modified a touch
- to include special handling for long "unknown char"
- sequences. The basic idea being that we use AC as long
- as we are dealing with a possible matching char, when
- we encounter an unknown char (and we have not encountered
- an accepting state) we scan forward until we find a legal
- starting char.
- AC matching is basically that of trie matching, except
- that when we encounter a failing transition, we fall back
- to the current states "fail state", and try the current char
- again, a process we repeat until we reach the root state,
- state 1, or a legal transition. If we fail on the root state
- then we can either terminate if we have reached an accepting
- state previously, or restart the entire process from the beginning
- if we have not.
-
- */
- while (s <= last_start) {
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- U8 *uc = (U8*)s;
- U16 charid = 0;
- U32 base = 1;
- U32 state = 1;
- UV uvc = 0;
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- U8 *leftmost = NULL;
-#ifdef DEBUGGING
- U32 accepted_word= 0;
-#endif
- U32 pointpos = 0;
-
- while ( state && uc <= (U8*)strend ) {
- int failed=0;
- U32 word = aho->states[ state ].wordnum;
-
- if( state==1 ) {
- if ( bitmap ) {
- DEBUG_TRIE_EXECUTE_r(
- if ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- dump_exec_pos( (char *)uc, c, strend, real_start,
- (char *)uc, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- " Scanning for legal start char...\n");
- }
- );
- while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- uc++;
- }
- s= (char *)uc;
- }
- if (uc >(U8*)last_start) break;
- }
-
- if ( word ) {
- U8 *lpos= points[ (pointpos - trie->wordlen[word-1] ) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=word);
- leftmost= lpos;
- }
- if (base==0) break;
-
- }
- points[pointpos++ % maxlen]= uc;
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
- DEBUG_TRIE_EXECUTE_r({
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf(Perl_debug_log,
- " Charid:%3u CP:%4"UVxf" ",
- charid, uvc);
- });
-
- do {
-#ifdef DEBUGGING
- word = aho->states[ state ].wordnum;
-#endif
- base = aho->states[ state ].trans.base;
-
- DEBUG_TRIE_EXECUTE_r({
- if (failed)
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%sState: %4"UVxf", word=%"UVxf,
- failed ? " Fail transition to " : "",
- (UV)state, (UV)word);
- });
- if ( base ) {
- U32 tmp;
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state
- && (tmp=trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next))
- {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - legal\n"));
- state = tmp;
- break;
- }
- else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - fail\n"));
- failed = 1;
- state = aho->fail[state];
- }
- }
- else {
- /* we must be accepting here */
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - accepting\n"));
- failed = 1;
- break;
- }
- } while(state);
- uc += len;
- if (failed) {
- if (leftmost)
- break;
- if (!state) state = 1;
- }
- }
- if ( aho->states[ state ].wordnum ) {
- U8 *lpos = points[ (pointpos - trie->wordlen[aho->states[ state ].wordnum-1]) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=aho->states[ state ].wordnum);
- leftmost = lpos;
- }
- }
- if (leftmost) {
- s = (char*)leftmost;
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf(
- Perl_debug_log,"Matches word #%"UVxf" at position %"IVdf". Trying full pattern...\n",
- (UV)accepted_word, (IV)(s - real_start)
- );
- });
- if (!reginfo || regtry(reginfo, &s)) {
- FREETMPS;
- LEAVE;
- goto got_it;
- }
- s = HOPc(s,1);
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,"Pattern failed. Looking for new start point...\n");
- });
- } else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,"No match.\n"));
- break;
- }
- }
- FREETMPS;
- LEAVE;
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c));
- break;
- }
- return 0;
- got_it:
- return s;
-}
-
-
-/*
- - regexec_flags - match a regexp against a string
- */
-I32
-Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, register char *strend,
- char *strbeg, I32 minend, SV *sv, void *data, U32 flags)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* data: May be used for some additional optimizations.
- Currently its only used, with a U32 cast, for transmitting
- the ganch offset when doing a /g match. This will change */
-/* nosave: For optimizations. */
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- /*register*/ char *s;
- register regnode *c;
- /*register*/ char *startpos = stringarg;
- I32 minlen; /* must match at least this many chars */
- I32 dontbother = 0; /* how many characters not to try at end */
- I32 end_shift = 0; /* Same for the end. */ /* CC */
- I32 scream_pos = -1; /* Internal iterator of scream. */
- char *scream_olds = NULL;
- const bool do_utf8 = (bool)DO_UTF8(sv);
- I32 multiline;
- RXi_GET_DECL(prog,progi);
- regmatch_info reginfo; /* create some info to pass to regtry etc */
- regexp_paren_pair *swap = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGEXEC_FLAGS;
- PERL_UNUSED_ARG(data);
-
- /* Be paranoid... */
- if (prog == NULL || startpos == NULL) {
- Perl_croak(aTHX_ "NULL regexp parameter");
- return 0;
- }
-
- multiline = prog->extflags & RXf_PMf_MULTILINE;
- reginfo.prog = rx; /* Yes, sorry that this is confusing. */
-
- RX_MATCH_UTF8_set(rx, do_utf8);
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, startpos, strend,
- "Matching");
- );
-
- minlen = prog->minlen;
-
- if (strend - startpos < (minlen+(prog->check_offset_min<0?prog->check_offset_min:0))) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short [regexec_flags]...\n"));
- goto phooey;
- }
-
-
- /* Check validity of program. */
- if (UCHARAT(progi->program) != REG_MAGIC) {
- Perl_croak(aTHX_ "corrupted regexp program");
- }
-
- PL_reg_flags = 0;
- PL_reg_eval_set = 0;
- PL_reg_maxiter = 0;
-
- if (RX_UTF8(rx))
- PL_reg_flags |= RF_utf8;
-
- /* Mark beginning of line for ^ and lookbehind. */
- reginfo.bol = startpos; /* XXX not used ??? */
- PL_bostr = strbeg;
- reginfo.sv = sv;
-
- /* Mark end of line for $ (and such) */
- PL_regeol = strend;
-
- /* see how far we have to get to not match where we matched before */
- reginfo.till = startpos+minend;
-
- /* If there is a "must appear" string, look for it. */
- s = startpos;
-
- if (prog->extflags & RXf_GPOS_SEEN) { /* Need to set reginfo->ganch */
- MAGIC *mg;
- if (flags & REXEC_IGNOREPOS){ /* Means: check only at start */
- reginfo.ganch = startpos + prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS IGNOREPOS: reginfo.ganch = startpos + %"UVxf"\n",(UV)prog->gofs));
- } else if (sv && SvTYPE(sv) >= SVt_PVMG
- && SvMAGIC(sv)
- && (mg = mg_find(sv, PERL_MAGIC_regex_global))
- && mg->mg_len >= 0) {
- reginfo.ganch = strbeg + mg->mg_len; /* Defined pos() */
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS MAGIC: reginfo.ganch = strbeg + %"IVdf"\n",(IV)mg->mg_len));
-
- if (prog->extflags & RXf_ANCH_GPOS) {
- if (s > reginfo.ganch)
- goto phooey;
- s = reginfo.ganch - prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS ANCH_GPOS: s = ganch - %"UVxf"\n",(UV)prog->gofs));
- if (s < strbeg)
- goto phooey;
- }
- }
- else if (data) {
- reginfo.ganch = strbeg + PTR2UV(data);
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS DATA: reginfo.ganch= strbeg + %"UVxf"\n",PTR2UV(data)));
-
- } else { /* pos() not defined */
- reginfo.ganch = strbeg;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS: reginfo.ganch = strbeg\n"));
- }
- }
- if (PL_curpm && (PM_GETRE(PL_curpm) == rx)) {
- /* We have to be careful. If the previous successful match
- was from this regex we don't want a subsequent partially
- successful match to clobber the old results.
- So when we detect this possibility we add a swap buffer
- to the re, and switch the buffer each match. If we fail
- we switch it back, otherwise we leave it swapped.
- */
- swap = prog->offs;
- /* do we need a save destructor here for eval dies? */
- Newxz(prog->offs, (prog->nparens + 1), regexp_paren_pair);
- }
- if (!(flags & REXEC_CHECKED) && (prog->check_substr != NULL || prog->check_utf8 != NULL)) {
- re_scream_pos_data d;
-
- d.scream_olds = &scream_olds;
- d.scream_pos = &scream_pos;
- s = re_intuit_start(rx, sv, s, strend, flags, &d);
- if (!s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not present...\n"));
- goto phooey; /* not present */
- }
- }
-
-
-
- /* Simplest case: anchored match need be tried only once. */
- /* [unless only anchor is BOL and multiline is set] */
- if (prog->extflags & (RXf_ANCH & ~RXf_ANCH_GPOS)) {
- if (s == startpos && regtry(®info, &startpos))
- goto got_it;
- else if (multiline || (prog->intflags & PREGf_IMPLICIT)
- || (prog->extflags & RXf_ANCH_MBOL)) /* XXXX SBOL? */
- {
- char *end;
-
- if (minlen)
- dontbother = minlen - 1;
- end = HOP3c(strend, -dontbother, strbeg) - 1;
- /* for multiline we only have to try after newlines */
- if (prog->check_substr || prog->check_utf8) {
- if (s == startpos)
- goto after_try;
- while (1) {
- if (regtry(®info, &s))
- goto got_it;
- after_try:
- if (s > end)
- goto phooey;
- if (prog->extflags & RXf_USE_INTUIT) {
- s = re_intuit_start(rx, sv, s + 1, strend, flags, NULL);
- if (!s)
- goto phooey;
- }
- else
- s++;
- }
- } else {
- if (s > startpos)
- s--;
- while (s < end) {
- if (*s++ == '\n') { /* don't need PL_utf8skip here */
- if (regtry(®info, &s))
- goto got_it;
- }
- }
- }
- }
- goto phooey;
- } else if (RXf_GPOS_CHECK == (prog->extflags & RXf_GPOS_CHECK))
- {
- /* the warning about reginfo.ganch being used without intialization
- is bogus -- we set it above, when prog->extflags & RXf_GPOS_SEEN
- and we only enter this block when the same bit is set. */
- char *tmp_s = reginfo.ganch - prog->gofs;
-
- if (tmp_s >= strbeg && regtry(®info, &tmp_s))
- goto got_it;
- goto phooey;
- }
-
- /* Messy cases: unanchored match. */
- if ((prog->anchored_substr || prog->anchored_utf8) && prog->intflags & PREGf_SKIP) {
- /* we have /x+whatever/ */
- /* it must be a one character string (XXXX Except UTF?) */
- char ch;
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- ch = SvPVX_const(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)[0];
-
- if (do_utf8) {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s += UTF8SKIP(s);
- while (s < strend && *s == ch)
- s += UTF8SKIP(s);
- }
- );
- }
- else {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s++;
- while (s < strend && *s == ch)
- s++;
- }
- );
- }
- DEBUG_EXECUTE_r(if (!did_match)
- PerlIO_printf(Perl_debug_log,
- "Did not find anchored character...\n")
- );
- }
- else if (prog->anchored_substr != NULL
- || prog->anchored_utf8 != NULL
- || ((prog->float_substr != NULL || prog->float_utf8 != NULL)
- && prog->float_max_offset < strend - s)) {
- SV *must;
- I32 back_max;
- I32 back_min;
- char *last;
- char *last1; /* Last position checked before */
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (prog->anchored_substr || prog->anchored_utf8) {
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- back_max = back_min = prog->anchored_offset;
- } else {
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- back_max = prog->float_max_offset;
- back_min = prog->float_min_offset;
- }
-
-
- if (must == &PL_sv_undef)
- /* could not downgrade utf8 check substring, so must fail */
- goto phooey;
-
- if (back_min<0) {
- last = strend;
- } else {
- last = HOP3c(strend, /* Cannot start after this */
- -(I32)(CHR_SVLEN(must)
- - (SvTAIL(must) != 0) + back_min), strbeg);
- }
- if (s > PL_bostr)
- last1 = HOPc(s, -1);
- else
- last1 = s - 1; /* bogus */
-
- /* XXXX check_substr already used to find "s", can optimize if
- check_substr==must. */
- scream_pos = -1;
- dontbother = end_shift;
- strend = HOPc(strend, -dontbother);
- while ( (s <= last) &&
- ((flags & REXEC_SCREAM)
- ? (s = screaminstr(sv, must, HOP3c(s, back_min, (back_min<0 ? strbeg : strend)) - strbeg,
- end_shift, &scream_pos, 0))
- : (s = fbm_instr((unsigned char*)HOP3(s, back_min, (back_min<0 ? strbeg : strend)),
- (unsigned char*)strend, must,
- multiline ? FBMrf_MULTILINE : 0))) ) {
- /* we may be pointing at the wrong string */
- if ((flags & REXEC_SCREAM) && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- DEBUG_EXECUTE_r( did_match = 1 );
- if (HOPc(s, -back_max) > last1) {
- last1 = HOPc(s, -back_min);
- s = HOPc(s, -back_max);
- }
- else {
- char * const t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1;
-
- last1 = HOPc(s, -back_min);
- s = t;
- }
- if (do_utf8) {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s += UTF8SKIP(s);
- }
- }
- else {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s++;
- }
- }
- }
- DEBUG_EXECUTE_r(if (!did_match) {
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "Did not find %s substr %s%s...\n",
- ((must == prog->anchored_substr || must == prog->anchored_utf8)
- ? "anchored" : "floating"),
- quoted, RE_SV_TAIL(must));
- });
- goto phooey;
- }
- else if ( (c = progi->regstclass) ) {
- if (minlen) {
- const OPCODE op = OP(progi->regstclass);
- /* don't bother with what can't match */
- if (PL_regkind[op] != EXACT && op != CANY && PL_regkind[op] != TRIE)
- strend = HOPc(strend, -(minlen - 1));
- }
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, c);
- {
- RE_PV_QUOTED_DECL(quoted,do_utf8,PERL_DEBUG_PAD_ZERO(1),
- s,strend-s,60);
- PerlIO_printf(Perl_debug_log,
- "Matching stclass %.*s against %s (%d chars)\n",
- (int)SvCUR(prop), SvPVX_const(prop),
- quoted, (int)(strend - s));
- }
- });
- if (find_byclass(prog, c, s, strend, ®info))
- goto got_it;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass... [regexec_flags]\n"));
- }
- else {
- dontbother = 0;
- if (prog->float_substr != NULL || prog->float_utf8 != NULL) {
- /* Trim the end. */
- char *last;
- SV* float_real;
-
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- float_real = do_utf8 ? prog->float_utf8 : prog->float_substr;
-
- if (flags & REXEC_SCREAM) {
- last = screaminstr(sv, float_real, s - strbeg,
- end_shift, &scream_pos, 1); /* last one */
- if (!last)
- last = scream_olds; /* Only one occurrence. */
- /* we may be pointing at the wrong string */
- else if (RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- }
- else {
- STRLEN len;
- const char * const little = SvPV_const(float_real, len);
-
- if (SvTAIL(float_real)) {
- if (memEQ(strend - len + 1, little, len - 1))
- last = strend - len + 1;
- else if (!multiline)
- last = memEQ(strend - len, little, len)
- ? strend - len : NULL;
- else
- goto find_last;
- } else {
- find_last:
- if (len)
- last = rninstr(s, strend, little, little + len);
- else
- last = strend; /* matching "$" */
- }
- }
- if (last == NULL) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%sCan't trim the tail, match fails (should not happen)%s\n",
- PL_colors[4], PL_colors[5]));
- goto phooey; /* Should not happen! */
- }
- dontbother = strend - last + prog->float_min_offset;
- }
- if (minlen && (dontbother < minlen))
- dontbother = minlen - 1;
- strend -= dontbother; /* this one's always in bytes! */
- /* We don't know much -- general case. */
- if (do_utf8) {
- for (;;) {
- if (regtry(®info, &s))
- goto got_it;
- if (s >= strend)
- break;
- s += UTF8SKIP(s);
- };
- }
- else {
- do {
- if (regtry(®info, &s))
- goto got_it;
- } while (s++ < strend);
- }
- }
-
- /* Failure. */
- goto phooey;
-
-got_it:
- Safefree(swap);
- RX_MATCH_TAINTED_set(rx, PL_reg_flags & RF_tainted);
-
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (RXp_PAREN_NAMES(prog))
- (void)hv_iterinit(RXp_PAREN_NAMES(prog));
-
- /* make sure $`, $&, $', and $digit will work later */
- if ( !(flags & REXEC_NOT_FIRST) ) {
- RX_MATCH_COPY_FREE(rx);
- if (flags & REXEC_COPY_STR) {
- const I32 i = PL_regeol - startpos + (stringarg - strbeg);
-#ifdef PERL_OLD_COPY_ON_WRITE
- if ((SvIsCOW(sv)
- || (SvFLAGS(sv) & CAN_COW_MASK) == CAN_COW_FLAGS)) {
- if (DEBUG_C_TEST) {
- PerlIO_printf(Perl_debug_log,
- "Copy on write: regexp capture, type %d\n",
- (int) SvTYPE(sv));
- }
- prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv);
- prog->subbeg = (char *)SvPVX_const(prog->saved_copy);
- assert (SvPOKp(prog->saved_copy));
- } else
-#endif
- {
- RX_MATCH_COPIED_on(rx);
- s = savepvn(strbeg, i);
- prog->subbeg = s;
- }
- prog->sublen = i;
- }
- else {
- prog->subbeg = strbeg;
- prog->sublen = PL_regeol - strbeg; /* strend may have been modified */
- }
- }
-
- return 1;
-
-phooey:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n",
- PL_colors[4], PL_colors[5]));
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (swap) {
- /* we failed :-( roll it back */
- Safefree(prog->offs);
- prog->offs = swap;
- }
-
- return 0;
-}
-
-
-/*
- - regtry - try match at specific point
- */
-STATIC I32 /* 0 failure, 1 success */
-S_regtry(pTHX_ regmatch_info *reginfo, char **startpos)
-{
- dVAR;
- CHECKPOINT lastcp;
- REGEXP *const rx = reginfo->prog;
- regexp *const prog = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTRY;
-
- reginfo->cutpoint=NULL;
-
- if ((prog->extflags & RXf_EVAL_SEEN) && !PL_reg_eval_set) {
- MAGIC *mg;
-
- PL_reg_eval_set = RS_init;
- DEBUG_EXECUTE_r(DEBUG_s(
- PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n",
- (IV)(PL_stack_sp - PL_stack_base));
- ));
- SAVESTACK_CXPOS();
- cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base;
- /* Otherwise OP_NEXTSTATE will free whatever on stack now. */
- SAVETMPS;
- /* Apparently this is not needed, judging by wantarray. */
- /* SAVEI8(cxstack[cxstack_ix].blk_gimme);
- cxstack[cxstack_ix].blk_gimme = G_SCALAR; */
-
- if (reginfo->sv) {
- /* Make $_ available to executed code. */
- if (reginfo->sv != DEFSV) {
- SAVE_DEFSV;
- DEFSV_set(reginfo->sv);
- }
-
- if (!(SvTYPE(reginfo->sv) >= SVt_PVMG && SvMAGIC(reginfo->sv)
- && (mg = mg_find(reginfo->sv, PERL_MAGIC_regex_global)))) {
- /* prepare for quick setting of pos */
-#ifdef PERL_OLD_COPY_ON_WRITE
- if (SvIsCOW(reginfo->sv))
- sv_force_normal_flags(reginfo->sv, 0);
-#endif
- mg = sv_magicext(reginfo->sv, NULL, PERL_MAGIC_regex_global,
- &PL_vtbl_mglob, NULL, 0);
- mg->mg_len = -1;
- }
- PL_reg_magic = mg;
- PL_reg_oldpos = mg->mg_len;
- SAVEDESTRUCTOR_X(restore_pos, prog);
- }
- if (!PL_reg_curpm) {
- Newxz(PL_reg_curpm, 1, PMOP);
-#ifdef USE_ITHREADS
- {
- SV* const repointer = &PL_sv_undef;
- /* this regexp is also owned by the new PL_reg_curpm, which
- will try to free it. */
- av_push(PL_regex_padav, repointer);
- PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav);
- PL_regex_pad = AvARRAY(PL_regex_padav);
- }
-#endif
- }
-#ifdef USE_ITHREADS
- /* It seems that non-ithreads works both with and without this code.
- So for efficiency reasons it seems best not to have the code
- compiled when it is not needed. */
- /* This is safe against NULLs: */
- ReREFCNT_dec(PM_GETRE(PL_reg_curpm));
- /* PM_reg_curpm owns a reference to this regexp. */
- ReREFCNT_inc(rx);
-#endif
- PM_SETRE(PL_reg_curpm, rx);
- PL_reg_oldcurpm = PL_curpm;
- PL_curpm = PL_reg_curpm;
- if (RXp_MATCH_COPIED(prog)) {
- /* Here is a serious problem: we cannot rewrite subbeg,
- since it may be needed if this match fails. Thus
- $` inside (?{}) could fail... */
- PL_reg_oldsaved = prog->subbeg;
- PL_reg_oldsavedlen = prog->sublen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = prog->saved_copy;
-#endif
- RXp_MATCH_COPIED_off(prog);
- }
- else
- PL_reg_oldsaved = NULL;
- prog->subbeg = PL_bostr;
- prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */
- }
- DEBUG_EXECUTE_r(PL_reg_starttry = *startpos);
- prog->offs[0].start = *startpos - PL_bostr;
- PL_reginput = *startpos;
- PL_reglastparen = &prog->lastparen;
- PL_reglastcloseparen = &prog->lastcloseparen;
- prog->lastparen = 0;
- prog->lastcloseparen = 0;
- PL_regsize = 0;
- PL_regoffs = prog->offs;
- if (PL_reg_start_tmpl <= prog->nparens) {
- PL_reg_start_tmpl = prog->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- /* XXXX What this code is doing here?!!! There should be no need
- to do this again and again, PL_reglastparen should take care of
- this! --ilya*/
-
- /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code.
- * Actually, the code in regcppop() (which Ilya may be meaning by
- * PL_reglastparen), is not needed at all by the test suite
- * (op/regexp, op/pat, op/split), but that code is needed otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * Meanwhile, this code *is* needed for the
- * above-mentioned test suite tests to succeed. The common theme
- * on those tests seems to be returning null fields from matches.
- * --jhi updated by dapm */
-#if 1
- if (prog->nparens) {
- regexp_paren_pair *pp = PL_regoffs;
- register I32 i;
- for (i = prog->nparens; i > (I32)*PL_reglastparen; i--) {
- ++pp;
- pp->start = -1;
- pp->end = -1;
- }
- }
-#endif
- REGCP_SET(lastcp);
- if (regmatch(reginfo, progi->program + 1)) {
- PL_regoffs[0].end = PL_reginput - PL_bostr;
- return 1;
- }
- if (reginfo->cutpoint)
- *startpos= reginfo->cutpoint;
- REGCP_UNWIND(lastcp);
- return 0;
-}
-
-
-#define sayYES goto yes
-#define sayNO goto no
-#define sayNO_SILENT goto no_silent
-
-/* we dont use STMT_START/END here because it leads to
- "unreachable code" warnings, which are bogus, but distracting. */
-#define CACHEsayNO \
- if (ST.cache_mask) \
- PL_reg_poscache[ST.cache_offset] |= ST.cache_mask; \
- sayNO
-
-/* this is used to determine how far from the left messages like
- 'failed...' are printed. It should be set such that messages
- are inline with the regop output that created them.
-*/
-#define REPORT_CODE_OFF 32
-
-
-/* Make sure there is a test for this +1 options in re_tests */
-#define TRIE_INITAL_ACCEPT_BUFFLEN 4;
-
-#define CHRTEST_UNINIT -1001 /* c1/c2 haven't been calculated yet */
-#define CHRTEST_VOID -1000 /* the c1/c2 "next char" test should be skipped */
-
-#define SLAB_FIRST(s) (&(s)->states[0])
-#define SLAB_LAST(s) (&(s)->states[PERL_REGMATCH_SLAB_SLOTS-1])
-
-/* grab a new slab and return the first slot in it */
-
-STATIC regmatch_state *
-S_push_slab(pTHX)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- regmatch_slab *s = PL_regmatch_slab->next;
- if (!s) {
- Newx(s, 1, regmatch_slab);
- s->prev = PL_regmatch_slab;
- s->next = NULL;
- PL_regmatch_slab->next = s;
- }
- PL_regmatch_slab = s;
- return SLAB_FIRST(s);
-}
-
-
-/* push a new state then goto it */
-
-#define PUSH_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_state;
-
-/* push a new state with success backtracking, then goto it */
-
-#define PUSH_YES_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_yes_state;
-
-
-
-/*
-
-regmatch() - main matching routine
-
-This is basically one big switch statement in a loop. We execute an op,
-set 'next' to point the next op, and continue. If we come to a point which
-we may need to backtrack to on failure such as (A|B|C), we push a
-backtrack state onto the backtrack stack. On failure, we pop the top
-state, and re-enter the loop at the state indicated. If there are no more
-states to pop, we return failure.
-
-Sometimes we also need to backtrack on success; for example /A+/, where
-after successfully matching one A, we need to go back and try to
-match another one; similarly for lookahead assertions: if the assertion
-completes successfully, we backtrack to the state just before the assertion
-and then carry on. In these cases, the pushed state is marked as
-'backtrack on success too'. This marking is in fact done by a chain of
-pointers, each pointing to the previous 'yes' state. On success, we pop to
-the nearest yes state, discarding any intermediate failure-only states.
-Sometimes a yes state is pushed just to force some cleanup code to be
-called at the end of a successful match or submatch; e.g. (??{$re}) uses
-it to free the inner regex.
-
-Note that failure backtracking rewinds the cursor position, while
-success backtracking leaves it alone.
-
-A pattern is complete when the END op is executed, while a subpattern
-such as (?=foo) is complete when the SUCCESS op is executed. Both of these
-ops trigger the "pop to last yes state if any, otherwise return true"
-behaviour.
-
-A common convention in this function is to use A and B to refer to the two
-subpatterns (or to the first nodes thereof) in patterns like /A*B/: so A is
-the subpattern to be matched possibly multiple times, while B is the entire
-rest of the pattern. Variable and state names reflect this convention.
-
-The states in the main switch are the union of ops and failure/success of
-substates associated with with that op. For example, IFMATCH is the op
-that does lookahead assertions /(?=A)B/ and so the IFMATCH state means
-'execute IFMATCH'; while IFMATCH_A is a state saying that we have just
-successfully matched A and IFMATCH_A_fail is a state saying that we have
-just failed to match A. Resume states always come in pairs. The backtrack
-state we push is marked as 'IFMATCH_A', but when that is popped, we resume
-at IFMATCH_A or IFMATCH_A_fail, depending on whether we are backtracking
-on success or failure.
-
-The struct that holds a backtracking state is actually a big union, with
-one variant for each major type of op. The variable st points to the
-top-most backtrack struct. To make the code clearer, within each
-block of code we #define ST to alias the relevant union.
-
-Here's a concrete example of a (vastly oversimplified) IFMATCH
-implementation:
-
- switch (state) {
- ....
-
-#define ST st->u.ifmatch
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- ST.foo = ...; // some state we wish to save
- ...
- // push a yes backtrack state with a resume value of
- // IFMATCH_A/IFMATCH_A_fail, then continue execution at the
- // first node of A:
- PUSH_YES_STATE_GOTO(IFMATCH_A, A);
- // NOTREACHED
-
- case IFMATCH_A: // we have successfully executed A; now continue with B
- next = B;
- bar = ST.foo; // do something with the preserved value
- break;
-
- case IFMATCH_A_fail: // A failed, so the assertion failed
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
-
-#undef ST
-
- ...
- }
-
-For any old-timers reading this who are familiar with the old recursive
-approach, the code above is equivalent to:
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- {
- int foo = ...
- ...
- if (regmatch(A)) {
- next = B;
- bar = foo;
- break;
- }
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
- }
-
-The topmost backtrack state, pointed to by st, is usually free. If you
-want to claim it, populate any ST.foo fields in it with values you wish to
-save, then do one of
-
- PUSH_STATE_GOTO(resume_state, node);
- PUSH_YES_STATE_GOTO(resume_state, node);
-
-which sets that backtrack state's resume value to 'resume_state', pushes a
-new free entry to the top of the backtrack stack, then goes to 'node'.
-On backtracking, the free slot is popped, and the saved state becomes the
-new free state. An ST.foo field in this new top state can be temporarily
-accessed to retrieve values, but once the main loop is re-entered, it
-becomes available for reuse.
-
-Note that the depth of the backtrack stack constantly increases during the
-left-to-right execution of the pattern, rather than going up and down with
-the pattern nesting. For example the stack is at its maximum at Z at the
-end of the pattern, rather than at X in the following:
-
- /(((X)+)+)+....(Y)+....Z/
-
-The only exceptions to this are lookahead/behind assertions and the cut,
-(?>A), which pop all the backtrack states associated with A before
-continuing.
-
-Bascktrack state structs are allocated in slabs of about 4K in size.
-PL_regmatch_state and st always point to the currently active state,
-and PL_regmatch_slab points to the slab currently containing
-PL_regmatch_state. The first time regmatch() is called, the first slab is
-allocated, and is never freed until interpreter destruction. When the slab
-is full, a new one is allocated and chained to the end. At exit from
-regmatch(), slabs allocated since entry are freed.
-
-*/
-
-
-#define DEBUG_STATE_pp(pp) \
- DEBUG_STATE_r({ \
- DUMP_EXEC_POS(locinput, scan, do_utf8); \
- PerlIO_printf(Perl_debug_log, \
- " %*s"pp" %s%s%s%s%s\n", \
- depth*2, "", \
- PL_reg_name[st->resume_state], \
- ((st==yes_state||st==mark_state) ? "[" : ""), \
- ((st==yes_state) ? "Y" : ""), \
- ((st==mark_state) ? "M" : ""), \
- ((st==yes_state||st==mark_state) ? "]" : "") \
- ); \
- });
-
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-prog) : -1)
-
-#ifdef DEBUGGING
-
-STATIC void
-S_debug_start_match(pTHX_ const REGEXP *prog, const bool do_utf8,
- const char *start, const char *end, const char *blurb)
-{
- const bool utf8_pat = RX_UTF8(prog) ? 1 : 0;
-
- PERL_ARGS_ASSERT_DEBUG_START_MATCH;
-
- if (!PL_colorset)
- reginitcolors();
- {
- RE_PV_QUOTED_DECL(s0, utf8_pat, PERL_DEBUG_PAD_ZERO(0),
- RX_PRECOMP_const(prog), RX_PRELEN(prog), 60);
-
- RE_PV_QUOTED_DECL(s1, do_utf8, PERL_DEBUG_PAD_ZERO(1),
- start, end - start, 60);
-
- PerlIO_printf(Perl_debug_log,
- "%s%s REx%s %s against %s\n",
- PL_colors[4], blurb, PL_colors[5], s0, s1);
-
- if (do_utf8||utf8_pat)
- PerlIO_printf(Perl_debug_log, "UTF-8 %s%s%s...\n",
- utf8_pat ? "pattern" : "",
- utf8_pat && do_utf8 ? " and " : "",
- do_utf8 ? "string" : ""
- );
- }
-}
-
-STATIC void
-S_dump_exec_pos(pTHX_ const char *locinput,
- const regnode *scan,
- const char *loc_regeol,
- const char *loc_bostr,
- const char *loc_reg_starttry,
- const bool do_utf8)
-{
- const int docolor = *PL_colors[0] || *PL_colors[2] || *PL_colors[4];
- const int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */
- int l = (loc_regeol - locinput) > taill ? taill : (loc_regeol - locinput);
- /* The part of the string before starttry has one color
- (pref0_len chars), between starttry and current
- position another one (pref_len - pref0_len chars),
- after the current position the third one.
- We assume that pref0_len <= pref_len, otherwise we
- decrease pref0_len. */
- int pref_len = (locinput - loc_bostr) > (5 + taill) - l
- ? (5 + taill) - l : locinput - loc_bostr;
- int pref0_len;
-
- PERL_ARGS_ASSERT_DUMP_EXEC_POS;
-
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len)))
- pref_len++;
- pref0_len = pref_len - (locinput - loc_reg_starttry);
- if (l + pref_len < (5 + taill) && l < loc_regeol - locinput)
- l = ( loc_regeol - locinput > (5 + taill) - pref_len
- ? (5 + taill) - pref_len : loc_regeol - locinput);
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput + l)))
- l--;
- if (pref0_len < 0)
- pref0_len = 0;
- if (pref0_len > pref_len)
- pref0_len = pref_len;
- {
- const int is_uni = (do_utf8 && OP(scan) != CANY) ? 1 : 0;
-
- RE_PV_COLOR_DECL(s0,len0,is_uni,PERL_DEBUG_PAD(0),
- (locinput - pref_len),pref0_len, 60, 4, 5);
-
- RE_PV_COLOR_DECL(s1,len1,is_uni,PERL_DEBUG_PAD(1),
- (locinput - pref_len + pref0_len),
- pref_len - pref0_len, 60, 2, 3);
-
- RE_PV_COLOR_DECL(s2,len2,is_uni,PERL_DEBUG_PAD(2),
- locinput, loc_regeol - locinput, 10, 0, 1);
-
- const STRLEN tlen=len0+len1+len2;
- PerlIO_printf(Perl_debug_log,
- "%4"IVdf" <%.*s%.*s%s%.*s>%*s|",
- (IV)(locinput - loc_bostr),
- len0, s0,
- len1, s1,
- (docolor ? "" : "> <"),
- len2, s2,
- (int)(tlen > 19 ? 0 : 19 - tlen),
- "");
- }
-}
-
-#endif
-
-/* reg_check_named_buff_matched()
- * Checks to see if a named buffer has matched. The data array of
- * buffer numbers corresponding to the buffer is expected to reside
- * in the regexp->data->data array in the slot stored in the ARG() of
- * node involved. Note that this routine doesn't actually care about the
- * name, that information is not preserved from compilation to execution.
- * Returns the index of the leftmost defined buffer with the given name
- * or 0 if non of the buffers matched.
- */
-STATIC I32
-S_reg_check_named_buff_matched(pTHX_ const regexp *rex, const regnode *scan)
-{
- I32 n;
- RXi_GET_DECL(rex,rexi);
- SV *sv_dat= MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
-
- PERL_ARGS_ASSERT_REG_CHECK_NAMED_BUFF_MATCHED;
-
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- if ((I32)*PL_reglastparen >= nums[n] &&
- PL_regoffs[nums[n]].end != -1)
- {
- return nums[n];
- }
- }
- return 0;
-}
-
-
-/* free all slabs above current one - called during LEAVE_SCOPE */
-
-STATIC void
-S_clear_backtrack_stack(pTHX_ void *p)
-{
- regmatch_slab *s = PL_regmatch_slab->next;
- PERL_UNUSED_ARG(p);
-
- if (!s)
- return;
- PL_regmatch_slab->next = NULL;
- while (s) {
- regmatch_slab * const osl = s;
- s = s->next;
- Safefree(osl);
- }
-}
-
-
-#define SETREX(Re1,Re2) \
- if (PL_reg_eval_set) PM_SETRE((PL_reg_curpm), (Re2)); \
- Re1 = (Re2)
-
-STATIC I32 /* 0 failure, 1 success */
-S_regmatch(pTHX_ regmatch_info *reginfo, regnode *prog)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- dVAR;
- register const bool do_utf8 = PL_reg_match_utf8;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- REGEXP *rex_sv = reginfo->prog;
- regexp *rex = (struct regexp *)SvANY(rex_sv);
- RXi_GET_DECL(rex,rexi);
- I32 oldsave;
- /* the current state. This is a cached copy of PL_regmatch_state */
- register regmatch_state *st;
- /* cache heavy used fields of st in registers */
- register regnode *scan;
- register regnode *next;
- register U32 n = 0; /* general value; init to avoid compiler warning */
- register I32 ln = 0; /* len or last; init to avoid compiler warning */
- register char *locinput = PL_reginput;
- register I32 nextchr; /* is always set to UCHARAT(locinput) */
-
- bool result = 0; /* return value of S_regmatch */
- int depth = 0; /* depth of backtrack stack */
- U32 nochange_depth = 0; /* depth of GOSUB recursion with nochange */
- const U32 max_nochange_depth =
- (3 * rex->nparens > MAX_RECURSE_EVAL_NOCHANGE_DEPTH) ?
- 3 * rex->nparens : MAX_RECURSE_EVAL_NOCHANGE_DEPTH;
- regmatch_state *yes_state = NULL; /* state to pop to on success of
- subpattern */
- /* mark_state piggy backs on the yes_state logic so that when we unwind
- the stack on success we can update the mark_state as we go */
- regmatch_state *mark_state = NULL; /* last mark state we have seen */
- regmatch_state *cur_eval = NULL; /* most recent EVAL_AB state */
- struct regmatch_state *cur_curlyx = NULL; /* most recent curlyx */
- U32 state_num;
- bool no_final = 0; /* prevent failure from backtracking? */
- bool do_cutgroup = 0; /* no_final only until next branch/trie entry */
- char *startpoint = PL_reginput;
- SV *popmark = NULL; /* are we looking for a mark? */
- SV *sv_commit = NULL; /* last mark name seen in failure */
- SV *sv_yes_mark = NULL; /* last mark name we have seen
- during a successfull match */
- U32 lastopen = 0; /* last open we saw */
- bool has_cutgroup = RX_HAS_CUTGROUP(rex) ? 1 : 0;
- SV* const oreplsv = GvSV(PL_replgv);
- /* these three flags are set by various ops to signal information to
- * the very next op. They have a useful lifetime of exactly one loop
- * iteration, and are not preserved or restored by state pushes/pops
- */
- bool sw = 0; /* the condition value in (?(cond)a|b) */
- bool minmod = 0; /* the next "{n,m}" is a "{n,m}?" */
- int logical = 0; /* the following EVAL is:
- 0: (?{...})
- 1: (?(?{...})X|Y)
- 2: (??{...})
- or the following IFMATCH/UNLESSM is:
- false: plain (?=foo)
- true: used as a condition: (?(?=foo))
- */
-#ifdef DEBUGGING
- GET_RE_DEBUG_FLAGS_DECL;
-#endif
-
- PERL_ARGS_ASSERT_REGMATCH;
-
- DEBUG_OPTIMISE_r( DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,"regmatch start\n");
- }));
- /* on first ever call to regmatch, allocate first slab */
- if (!PL_regmatch_slab) {
- Newx(PL_regmatch_slab, 1, regmatch_slab);
- PL_regmatch_slab->prev = NULL;
- PL_regmatch_slab->next = NULL;
- PL_regmatch_state = SLAB_FIRST(PL_regmatch_slab);
- }
-
- oldsave = PL_savestack_ix;
- SAVEDESTRUCTOR_X(S_clear_backtrack_stack, NULL);
- SAVEVPTR(PL_regmatch_slab);
- SAVEVPTR(PL_regmatch_state);
-
- /* grab next free state slot */
- st = ++PL_regmatch_state;
- if (st > SLAB_LAST(PL_regmatch_slab))
- st = PL_regmatch_state = S_push_slab(aTHX);
-
- /* Note that nextchr is a byte even in UTF */
- nextchr = UCHARAT(locinput);
- scan = prog;
- while (scan != NULL) {
-
- DEBUG_EXECUTE_r( {
- SV * const prop = sv_newmortal();
- regnode *rnext=regnext(scan);
- DUMP_EXEC_POS( locinput, scan, do_utf8 );
- regprop(rex, prop, scan);
-
- PerlIO_printf(Perl_debug_log,
- "%3"IVdf":%*s%s(%"IVdf")\n",
- (IV)(scan - rexi->program), depth*2, "",
- SvPVX_const(prop),
- (PL_regkind[OP(scan)] == END || !rnext) ?
- 0 : (IV)(rnext - rexi->program));
- });
-
- next = scan + NEXT_OFF(scan);
- if (next == scan)
- next = NULL;
- state_num = OP(scan);
-
- reenter_switch:
-
- assert(PL_reglastparen == &rex->lastparen);
- assert(PL_reglastcloseparen == &rex->lastcloseparen);
- assert(PL_regoffs == rex->offs);
-
- switch (state_num) {
- case BOL:
- if (locinput == PL_bostr)
- {
- /* reginfo->till = reginfo->bol; */
- break;
- }
- sayNO;
- case MBOL:
- if (locinput == PL_bostr ||
- ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n'))
- {
- break;
- }
- sayNO;
- case SBOL:
- if (locinput == PL_bostr)
- break;
- sayNO;
- case GPOS:
- if (locinput == reginfo->ganch)
- break;
- sayNO;
-
- case KEEPS:
- /* update the startpoint */
- st->u.keeper.val = PL_regoffs[0].start;
- PL_reginput = locinput;
- PL_regoffs[0].start = locinput - PL_bostr;
- PUSH_STATE_GOTO(KEEPS_next, next);
- /*NOT-REACHED*/
- case KEEPS_next_fail:
- /* rollback the start point change */
- PL_regoffs[0].start = st->u.keeper.val;
- sayNO_SILENT;
- /*NOT-REACHED*/
- case EOL:
- goto seol;
- case MEOL:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- break;
- case SEOL:
- seol:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- if (PL_regeol - locinput > 1)
- sayNO;
- break;
- case EOS:
- if (PL_regeol != locinput)
- sayNO;
- break;
- case SANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
- case CANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case REG_ANY:
- if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n')
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
-
-#undef ST
-#define ST st->u.trie
- case TRIEC:
- /* In this case the charclass data is available inline so
- we can fail fast without a lot of extra overhead.
- */
- if (scan->flags == EXACT || !do_utf8) {
- if(!ANYOF_BITMAP_TEST(scan, *locinput)) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case TRIE:
- {
- /* what type of TRIE am I? (utf8 makes this contextual) */
- DECL_TRIE_TYPE(scan);
-
- /* what trie are we using right now */
- reg_trie_data * const trie
- = (reg_trie_data*)rexi->data->data[ ARG( scan ) ];
- HV * widecharmap = MUTABLE_HV(rexi->data->data[ ARG( scan ) + 1 ]);
- U32 state = trie->startstate;
-
- if (trie->bitmap && trie_type != trie_utf8_fold &&
- !TRIE_BITMAP_TEST(trie,*locinput)
- ) {
- if (trie->states[ state ].wordnum) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %smatched empty string...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- break;
- } else {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- }
- }
-
- {
- U8 *uc = ( U8* )locinput;
-
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- STRLEN bufflen=0;
- SV *sv_accept_buff = NULL;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- ST.accepted = 0; /* how many accepting states we have seen */
- ST.B = next;
- ST.jump = trie->jump;
- ST.me = scan;
- /*
- traverse the TRIE keeping track of all accepting states
- we transition through until we get to a failing node.
- */
-
- while ( state && uc <= (U8*)PL_regeol ) {
- U32 base = trie->states[ state ].trans.base;
- UV uvc = 0;
- U16 charid;
- /* We use charid to hold the wordnum as we don't use it
- for charid until after we have done the wordnum logic.
- We define an alias just so that the wordnum logic reads
- more naturally. */
-
-#define got_wordnum charid
- got_wordnum = trie->states[ state ].wordnum;
-
- if ( got_wordnum ) {
- if ( ! ST.accepted ) {
- ENTER;
- SAVETMPS; /* XXX is this necessary? dmq */
- bufflen = TRIE_INITAL_ACCEPT_BUFFLEN;
- sv_accept_buff=newSV(bufflen *
- sizeof(reg_trie_accepted) - 1);
- SvCUR_set(sv_accept_buff, 0);
- SvPOK_on(sv_accept_buff);
- sv_2mortal(sv_accept_buff);
- SAVETMPS;
- ST.accept_buff =
- (reg_trie_accepted*)SvPV_nolen(sv_accept_buff );
- }
- do {
- if (ST.accepted >= bufflen) {
- bufflen *= 2;
- ST.accept_buff =(reg_trie_accepted*)
- SvGROW(sv_accept_buff,
- bufflen * sizeof(reg_trie_accepted));
- }
- SvCUR_set(sv_accept_buff,SvCUR(sv_accept_buff)
- + sizeof(reg_trie_accepted));
-
-
- ST.accept_buff[ST.accepted].wordnum = got_wordnum;
- ST.accept_buff[ST.accepted].endpos = uc;
- ++ST.accepted;
- } while (trie->nextword && (got_wordnum= trie->nextword[got_wordnum]));
- }
-#undef got_wordnum
-
- DEBUG_TRIE_EXECUTE_r({
- DUMP_EXEC_POS( (char *)uc, scan, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%*s %sState: %4"UVxf" Accepted: %4"UVxf" ",
- 2+depth * 2, "", PL_colors[4],
- (UV)state, (UV)ST.accepted );
- });
-
- if ( base ) {
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
-
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state)
- {
- state = trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next;
- }
- else {
- state = 0;
- }
- uc += len;
-
- }
- else {
- state = 0;
- }
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "Charid:%3x CP:%4"UVxf" After State: %4"UVxf"%s\n",
- charid, uvc, (UV)state, PL_colors[5] );
- );
- }
- if (!ST.accepted )
- sayNO;
-
- DEBUG_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" possible matches%s\n",
- REPORT_CODE_OFF + depth * 2, "",
- PL_colors[4], (IV)ST.accepted, PL_colors[5] );
- );
- }}
- goto trie_first_try; /* jump into the fail handler */
- /* NOTREACHED */
- case TRIE_next_fail: /* we failed - try next alterative */
- if ( ST.jump) {
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- }
- trie_first_try:
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
-
- if ( ST.jump) {
- ST.lastparen = *PL_reglastparen;
- REGCP_SET(ST.cp);
- }
- if ( ST.accepted == 1 ) {
- /* only one choice left - just continue */
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ 0 ].wordnum-1, 0 );
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %sonly one match left: #%d <%s>%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[ 0 ].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- )
- : "not compiled under -Dr",
- PL_colors[5] );
- });
- PL_reginput = (char *)ST.accept_buff[ 0 ].endpos;
- /* in this case we free tmps/leave before we call regmatch
- as we wont be using accept_buff again. */
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- if ( !ST.jump || !ST.jump[ST.accept_buff[0].wordnum])
- scan = ST.B;
- else
- scan = ST.me + ST.jump[ST.accept_buff[0].wordnum];
- if (!has_cutgroup) {
- FREETMPS;
- LEAVE;
- } else {
- ST.accepted--;
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- }
-
- continue; /* execute rest of RE */
- }
-
- if ( !ST.accepted-- ) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sTRIE failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- FREETMPS;
- LEAVE;
- sayNO_SILENT;
- /*NOTREACHED*/
- }
-
- /*
- There are at least two accepting states left. Presumably
- the number of accepting states is going to be low,
- typically two. So we simply scan through to find the one
- with lowest wordnum. Once we find it, we swap the last
- state into its place and decrement the size. We then try to
- match the rest of the pattern at the point where the word
- ends. If we succeed, control just continues along the
- regex; if we fail we return here to try the next accepting
- state
- */
-
- {
- U32 best = 0;
- U32 cur;
- for( cur = 1 ; cur <= ST.accepted ; cur++ ) {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" (%d) as best, looking at %"IVdf" (%d)%s\n",
- REPORT_CODE_OFF + depth * 2, "", PL_colors[4],
- (IV)best, ST.accept_buff[ best ].wordnum, (IV)cur,
- ST.accept_buff[ cur ].wordnum, PL_colors[5] );
- );
-
- if (ST.accept_buff[cur].wordnum <
- ST.accept_buff[best].wordnum)
- best = cur;
- }
-
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ best ].wordnum - 1, 0 );
- regnode *nextop=(!ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) ?
- ST.B :
- ST.me + ST.jump[ST.accept_buff[best].wordnum];
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %strying alternation #%d <%s> at node #%d %s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[best].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- ) : "not compiled under -Dr",
- REG_NODE_NUM(nextop),
- PL_colors[5] );
- });
-
- if ( best<ST.accepted ) {
- reg_trie_accepted tmp = ST.accept_buff[ best ];
- ST.accept_buff[ best ] = ST.accept_buff[ ST.accepted ];
- ST.accept_buff[ ST.accepted ] = tmp;
- best = ST.accepted;
- }
- PL_reginput = (char *)ST.accept_buff[ best ].endpos;
- if ( !ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) {
- scan = ST.B;
- } else {
- scan = ST.me + ST.jump[ST.accept_buff[best].wordnum];
- }
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- /* NOTREACHED */
- }
- /* NOTREACHED */
- case TRIE_next:
- /* we dont want to throw this away, see bug 57042*/
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- FREETMPS;
- LEAVE;
- sayYES;
-#undef ST
-
- case EXACT: {
- char *s = STRING(scan);
- ln = STR_LEN(scan);
- if (do_utf8 != UTF) {
- /* The target and the pattern have differing utf8ness. */
- char *l = locinput;
- const char * const e = s + ln;
-
- if (do_utf8) {
- /* The target is utf8, the pattern is not utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*(U8*)s) !=
- utf8n_to_uvuni((U8*)l, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- l += ulen;
- s ++;
- }
- }
- else {
- /* The target is not utf8, the pattern is utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*((U8*)l)) !=
- utf8n_to_uvuni((U8*)s, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- s += ulen;
- l ++;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
- /* The target and the pattern have the same utf8ness. */
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr)
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && memNE(s, locinput, ln))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case EXACTFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case EXACTF: {
- char * const s = STRING(scan);
- ln = STR_LEN(scan);
-
- if (do_utf8 || UTF) {
- /* Either target or the pattern are utf8. */
- const char * const l = locinput;
- char *e = PL_regeol;
-
- if (ibcmp_utf8(s, 0, ln, (bool)UTF,
- l, &e, 0, do_utf8)) {
- /* One more case for the sharp s:
- * pack("U0U*", 0xDF) =~ /ss/i,
- * the 0xC3 0x9F are the UTF-8
- * byte sequence for the U+00DF. */
-
- if (!(do_utf8 &&
- toLOWER(s[0]) == 's' &&
- ln >= 2 &&
- toLOWER(s[1]) == 's' &&
- (U8)l[0] == 0xC3 &&
- e - l >= 2 &&
- (U8)l[1] == 0x9F))
- sayNO;
- }
- locinput = e;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Neither the target and the pattern are utf8. */
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- UCHARAT(s) != ((OP(scan) == EXACTF)
- ? PL_fold : PL_fold_locale)[nextchr])
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && (OP(scan) == EXACTF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln)))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case BOUNDL:
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- case NBOUND:
- /* was last char in word? */
- if (do_utf8) {
- if (locinput == PL_bostr)
- ln = '\n';
- else {
- const U8 * const r = reghop3((U8*)locinput, -1, (U8*)PL_bostr);
-
- ln = utf8n_to_uvchr(r, UTF8SKIP(r), 0, uniflags);
- }
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM_uni(ln);
- LOAD_UTF8_CHARCLASS_ALNUM();
- n = swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8);
- }
- else {
- ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln));
- n = isALNUM_LC_utf8((U8*)locinput);
- }
- }
- else {
- ln = (locinput != PL_bostr) ?
- UCHARAT(locinput - 1) : '\n';
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM(ln);
- n = isALNUM(nextchr);
- }
- else {
- ln = isALNUM_LC(ln);
- n = isALNUM_LC(nextchr);
- }
- }
- if (((!ln) == (!n)) == (OP(scan) == BOUND ||
- OP(scan) == BOUNDL))
- sayNO;
- break;
- case ANYOF:
- if (do_utf8) {
- STRLEN inclasslen = PL_regeol - locinput;
-
- if (!reginclass(rex, scan, (U8*)locinput, &inclasslen, do_utf8))
- goto anyof_fail;
- if (locinput >= PL_regeol)
- sayNO;
- locinput += inclasslen ? inclasslen : UTF8SKIP(locinput);
- nextchr = UCHARAT(locinput);
- break;
- }
- else {
- if (nextchr < 0)
- nextchr = UCHARAT(locinput);
- if (!REGINCLASS(rex, scan, (U8*)locinput))
- goto anyof_fail;
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- }
- anyof_fail:
- /* If we might have the case of the German sharp s
- * in a casefolding Unicode character class. */
-
- if (ANYOF_FOLD_SHARP_S(scan, locinput, PL_regeol)) {
- locinput += SHARP_S_SKIP;
- nextchr = UCHARAT(locinput);
- }
- else
- sayNO;
- break;
- /* Special char classes - The defines start on line 129 or so */
- CCC_TRY_AFF( ALNUM, ALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
- CCC_TRY_NEG(NALNUM, NALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
-
- CCC_TRY_AFF( SPACE, SPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
- CCC_TRY_NEG(NSPACE, NSPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
-
- CCC_TRY_AFF( DIGIT, DIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
- CCC_TRY_NEG(NDIGIT, NDIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
-
- case CLUMP:
- if (locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- LOAD_UTF8_CHARCLASS_MARK();
- if (swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8))
- sayNO;
- locinput += PL_utf8skip[nextchr];
- while (locinput < PL_regeol &&
- swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8))
- locinput += UTF8SKIP(locinput);
- if (locinput > PL_regeol)
- sayNO;
- }
- else
- locinput++;
- nextchr = UCHARAT(locinput);
- break;
-
- case NREFFL:
- {
- char *s;
- char type;
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NREF:
- case NREFF:
- type = OP(scan);
- n = reg_check_named_buff_matched(rex,scan);
-
- if ( n ) {
- type = REF + ( type - NREF );
- goto do_ref;
- } else {
- sayNO;
- }
- /* unreached */
- case REFFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case REF:
- case REFF:
- n = ARG(scan); /* which paren pair */
- type = OP(scan);
- do_ref:
- ln = PL_regoffs[n].start;
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (*PL_reglastparen < n || ln == -1)
- sayNO; /* Do not match unless seen CLOSEn. */
- if (ln == PL_regoffs[n].end)
- break;
-
- s = PL_bostr + ln;
- if (do_utf8 && type != REF) { /* REF can do byte comparison */
- char *l = locinput;
- const char *e = PL_bostr + PL_regoffs[n].end;
- /*
- * Note that we can't do the "other character" lookup trick as
- * in the 8-bit case (no pun intended) because in Unicode we
- * have to map both upper and title case to lower case.
- */
- if (type == REFF) {
- while (s < e) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- if (l >= PL_regeol)
- sayNO;
- toLOWER_utf8((U8*)s, tmpbuf1, &ulen1);
- toLOWER_utf8((U8*)l, tmpbuf2, &ulen2);
- if (ulen1 != ulen2 || memNE((char *)tmpbuf1, (char *)tmpbuf2, ulen1))
- sayNO;
- s += ulen1;
- l += ulen2;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- (type == REF ||
- (UCHARAT(s) != (type == REFF
- ? PL_fold : PL_fold_locale)[nextchr])))
- sayNO;
- ln = PL_regoffs[n].end - ln;
- if (locinput + ln > PL_regeol)
- sayNO;
- if (ln > 1 && (type == REF
- ? memNE(s, locinput, ln)
- : (type == REFF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln))))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case NOTHING:
- case TAIL:
- break;
- case BACK:
- break;
-
-#undef ST
-#define ST st->u.eval
- {
- SV *ret;
- REGEXP *re_sv;
- regexp *re;
- regexp_internal *rei;
- regnode *startpoint;
-
- case GOSTART:
- case GOSUB: /* /(...(?1))/ /(...(?&foo))/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if (cur_eval->u.eval.close_paren == (U32)ARG(scan))
- Perl_croak(aTHX_ "Infinite recursion in regex");
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_
- "Pattern subroutine nesting without pos change"
- " exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- re_sv = rex_sv;
- re = rex;
- rei = rexi;
- (void)ReREFCNT_inc(rex_sv);
- if (OP(scan)==GOSUB) {
- startpoint = scan + ARG2L(scan);
- ST.close_paren = ARG(scan);
- } else {
- startpoint = rei->program+1;
- ST.close_paren = 0;
- }
- goto eval_recurse_doit;
- /* NOTREACHED */
- case EVAL: /* /(?{A})B/ /(??{A})B/ and /(?(?{A})X|Y)B/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_ "EVAL without pos change exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- {
- /* execute the code in the {...} */
- dSP;
- SV ** const before = SP;
- OP_4tree * const oop = PL_op;
- COP * const ocurcop = PL_curcop;
- PAD *old_comppad;
- char *saved_regeol = PL_regeol;
-
- n = ARG(scan);
- PL_op = (OP_4tree*)rexi->data->data[n];
- DEBUG_STATE_r( PerlIO_printf(Perl_debug_log,
- " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) );
- PAD_SAVE_LOCAL(old_comppad, (PAD*)rexi->data->data[n + 2]);
- PL_regoffs[0].end = PL_reg_magic->mg_len = locinput - PL_bostr;
-
- if (sv_yes_mark) {
- SV *sv_mrk = get_sv("REGMARK", 1);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- CALLRUNOPS(aTHX); /* Scalar context. */
- SPAGAIN;
- if (SP == before)
- ret = &PL_sv_undef; /* protect against empty (?{}) blocks. */
- else {
- ret = POPs;
- PUTBACK;
- }
-
- PL_op = oop;
- PAD_RESTORE_LOCAL(old_comppad);
- PL_curcop = ocurcop;
- PL_regeol = saved_regeol;
- if (!logical) {
- /* /(?{...})/ */
- sv_setsv(save_scalar(PL_replgv), ret);
- break;
- }
- }
- if (logical == 2) { /* Postponed subexpression: /(??{...})/ */
- logical = 0;
- {
- /* extract RE object from returned value; compiling if
- * necessary */
- MAGIC *mg = NULL;
- REGEXP *rx = NULL;
-
- if (SvROK(ret)) {
- SV *const sv = SvRV(ret);
-
- if (SvTYPE(sv) == SVt_REGEXP) {
- rx = (REGEXP*) sv;
- } else if (SvSMAGICAL(sv)) {
- mg = mg_find(sv, PERL_MAGIC_qr);
- assert(mg);
- }
- } else if (SvTYPE(ret) == SVt_REGEXP) {
- rx = (REGEXP*) ret;
- } else if (SvSMAGICAL(ret)) {
- if (SvGMAGICAL(ret)) {
- /* I don't believe that there is ever qr magic
- here. */
- assert(!mg_find(ret, PERL_MAGIC_qr));
- sv_unmagic(ret, PERL_MAGIC_qr);
- }
- else {
- mg = mg_find(ret, PERL_MAGIC_qr);
- /* testing suggests mg only ends up non-NULL for
- scalars who were upgraded and compiled in the
- else block below. In turn, this is only
- triggered in the "postponed utf8 string" tests
- in t/op/pat.t */
- }
- }
-
- if (mg) {
- rx = (REGEXP *) mg->mg_obj; /*XXX:dmq*/
- assert(rx);
- }
- if (rx) {
- rx = reg_temp_copy(rx);
- }
- else {
- U32 pm_flags = 0;
- const I32 osize = PL_regsize;
-
- if (DO_UTF8(ret)) {
- assert (SvUTF8(ret));
- } else if (SvUTF8(ret)) {
- /* Not doing UTF-8, despite what the SV says. Is
- this only if we're trapped in use 'bytes'? */
- /* Make a copy of the octet sequence, but without
- the flag on, as the compiler now honours the
- SvUTF8 flag on ret. */
- STRLEN len;
- const char *const p = SvPV(ret, len);
- ret = newSVpvn_flags(p, len, SVs_TEMP);
- }
- rx = CALLREGCOMP(ret, pm_flags);
- if (!(SvFLAGS(ret)
- & (SVs_TEMP | SVs_PADTMP | SVf_READONLY
- | SVs_GMG))) {
- /* This isn't a first class regexp. Instead, it's
- caching a regexp onto an existing, Perl visible
- scalar. */
- sv_magic(ret, MUTABLE_SV(rx), PERL_MAGIC_qr, 0, 0);
- }
- PL_regsize = osize;
- }
- re_sv = rx;
- re = (struct regexp *)SvANY(rx);
- }
- RXp_MATCH_COPIED_off(re);
- re->subbeg = rex->subbeg;
- re->sublen = rex->sublen;
- rei = RXi_GET(re);
- DEBUG_EXECUTE_r(
- debug_start_match(re_sv, do_utf8, locinput, PL_regeol,
- "Matching embedded");
- );
- startpoint = rei->program + 1;
- ST.close_paren = 0; /* only used for GOSUB */
- /* borrowed from regtry */
- if (PL_reg_start_tmpl <= re->nparens) {
- PL_reg_start_tmpl = re->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- eval_recurse_doit: /* Share code with GOSUB below this line */
- /* run the pattern returned from (??{...}) */
- ST.cp = regcppush(0); /* Save *all* the positions. */
- REGCP_SET(ST.lastcp);
-
- PL_regoffs = re->offs; /* essentially NOOP on GOSUB */
-
- /* see regtry, specifically PL_reglast(?:close)?paren is a pointer! (i dont know why) :dmq */
- PL_reglastparen = &re->lastparen;
- PL_reglastcloseparen = &re->lastcloseparen;
- re->lastparen = 0;
- re->lastcloseparen = 0;
-
- PL_reginput = locinput;
- PL_regsize = 0;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
-
- ST.toggle_reg_flags = PL_reg_flags;
- if (RX_UTF8(re_sv))
- PL_reg_flags |= RF_utf8;
- else
- PL_reg_flags &= ~RF_utf8;
- ST.toggle_reg_flags ^= PL_reg_flags; /* diff of old and new */
-
- ST.prev_rex = rex_sv;
- ST.prev_curlyx = cur_curlyx;
- SETREX(rex_sv,re_sv);
- rex = re;
- rexi = rei;
- cur_curlyx = NULL;
- ST.B = next;
- ST.prev_eval = cur_eval;
- cur_eval = st;
- /* now continue from first node in postoned RE */
- PUSH_YES_STATE_GOTO(EVAL_AB, startpoint);
- /* NOTREACHED */
- }
- /* logical is 1, /(?(?{...})X|Y)/ */
- sw = (bool)SvTRUE(ret);
- logical = 0;
- break;
- }
-
- case EVAL_AB: /* cleanup after a successful (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- regcpblow(ST.cp);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
- /* also update PL_regoffs */
- PL_regoffs = rex->offs;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayYES;
-
-
- case EVAL_AB_fail: /* unsuccessfully ran A or B in (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- PL_reginput = locinput;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayNO_SILENT;
-#undef ST
-
- case OPEN:
- n = ARG(scan); /* which paren pair */
- PL_reg_start_tmp[n] = locinput;
- if (n > PL_regsize)
- PL_regsize = n;
- lastopen = n;
- break;
- case CLOSE:
- n = ARG(scan); /* which paren pair */
- PL_regoffs[n].start = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if (cur_eval && cur_eval->u.eval.close_paren == n) {
- goto fake_end;
- }
- break;
- case ACCEPT:
- if (ARG(scan)){
- regnode *cursor;
- for (cursor=scan;
- cursor && OP(cursor)!=END;
- cursor=regnext(cursor))
- {
- if ( OP(cursor)==CLOSE ){
- n = ARG(cursor);
- if ( n <= lastopen ) {
- PL_regoffs[n].start
- = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if ( n == ARG(scan) || (cur_eval &&
- cur_eval->u.eval.close_paren == n))
- break;
- }
- }
- }
- }
- goto fake_end;
- /*NOTREACHED*/
- case GROUPP:
- n = ARG(scan); /* which paren pair */
- sw = (bool)(*PL_reglastparen >= n && PL_regoffs[n].end != -1);
- break;
- case NGROUPP:
- /* reg_check_named_buff_matched returns 0 for no match */
- sw = (bool)(0 < reg_check_named_buff_matched(rex,scan));
- break;
- case INSUBP:
- n = ARG(scan);
- sw = (cur_eval && (!n || cur_eval->u.eval.close_paren == n));
- break;
- case DEFINEP:
- sw = 0;
- break;
- case IFTHEN:
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (sw)
- next = NEXTOPER(NEXTOPER(scan));
- else {
- next = scan + ARG(scan);
- if (OP(next) == IFTHEN) /* Fake one. */
- next = NEXTOPER(NEXTOPER(next));
- }
- break;
- case LOGICAL:
- logical = scan->flags;
- break;
-
-/*******************************************************************
-
-The CURLYX/WHILEM pair of ops handle the most generic case of the /A*B/
-pattern, where A and B are subpatterns. (For simple A, CURLYM or
-STAR/PLUS/CURLY/CURLYN are used instead.)
-
-A*B is compiled as <CURLYX><A><WHILEM><B>
-
-On entry to the subpattern, CURLYX is called. This pushes a CURLYX
-state, which contains the current count, initialised to -1. It also sets
-cur_curlyx to point to this state, with any previous value saved in the
-state block.
-
-CURLYX then jumps straight to the WHILEM op, rather than executing A,
-since the pattern may possibly match zero times (i.e. it's a while {} loop
-rather than a do {} while loop).
-
-Each entry to WHILEM represents a successful match of A. The count in the
-CURLYX block is incremented, another WHILEM state is pushed, and execution
-passes to A or B depending on greediness and the current count.
-
-For example, if matching against the string a1a2a3b (where the aN are
-substrings that match /A/), then the match progresses as follows: (the
-pushed states are interspersed with the bits of strings matched so far):
-
- <CURLYX cnt=-1>
- <CURLYX cnt=0><WHILEM>
- <CURLYX cnt=1><WHILEM> a1 <WHILEM>
- <CURLYX cnt=2><WHILEM> a1 <WHILEM> a2 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> b
-
-(Contrast this with something like CURLYM, which maintains only a single
-backtrack state:
-
- <CURLYM cnt=0> a1
- a1 <CURLYM cnt=1> a2
- a1 a2 <CURLYM cnt=2> a3
- a1 a2 a3 <CURLYM cnt=3> b
-)
-
-Each WHILEM state block marks a point to backtrack to upon partial failure
-of A or B, and also contains some minor state data related to that
-iteration. The CURLYX block, pointed to by cur_curlyx, contains the
-overall state, such as the count, and pointers to the A and B ops.
-
-This is complicated slightly by nested CURLYX/WHILEM's. Since cur_curlyx
-must always point to the *current* CURLYX block, the rules are:
-
-When executing CURLYX, save the old cur_curlyx in the CURLYX state block,
-and set cur_curlyx to point the new block.
-
-When popping the CURLYX block after a successful or unsuccessful match,
-restore the previous cur_curlyx.
-
-When WHILEM is about to execute B, save the current cur_curlyx, and set it
-to the outer one saved in the CURLYX block.
-
-When popping the WHILEM block after a successful or unsuccessful B match,
-restore the previous cur_curlyx.
-
-Here's an example for the pattern (AI* BI)*BO
-I and O refer to inner and outer, C and W refer to CURLYX and WHILEM:
-
-cur_
-curlyx backtrack stack
------- ---------------
-NULL
-CO <CO prev=NULL> <WO>
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-NULL <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi <WO prev=CO> bo
-
-At this point the pattern succeeds, and we work back down the stack to
-clean up, restoring as we go:
-
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO>
-NULL
-
-*******************************************************************/
-
-#define ST st->u.curlyx
-
- case CURLYX: /* start of /A*B/ (for complex A) */
- {
- /* No need to save/restore up to this paren */
- I32 parenfloor = scan->flags;
-
- assert(next); /* keep Coverity happy */
- if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */
- next += ARG(next);
-
- /* XXXX Probably it is better to teach regpush to support
- parenfloor > PL_regsize... */
- if (parenfloor > (I32)*PL_reglastparen)
- parenfloor = *PL_reglastparen; /* Pessimization... */
-
- ST.prev_curlyx= cur_curlyx;
- cur_curlyx = st;
- ST.cp = PL_savestack_ix;
-
- /* these fields contain the state of the current curly.
- * they are accessed by subsequent WHILEMs */
- ST.parenfloor = parenfloor;
- ST.min = ARG1(scan);
- ST.max = ARG2(scan);
- ST.A = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- ST.B = next;
- ST.minmod = minmod;
- minmod = 0;
- ST.count = -1; /* this will be updated by WHILEM */
- ST.lastloc = NULL; /* this will be updated by WHILEM */
-
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYX_end, PREVOPER(next));
- /* NOTREACHED */
- }
-
- case CURLYX_end: /* just finished matching all of A*B */
- cur_curlyx = ST.prev_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case CURLYX_end_fail: /* just failed to match all of A*B */
- regcpblow(ST.cp);
- cur_curlyx = ST.prev_curlyx;
- sayNO;
- /* NOTREACHED */
-
-
-#undef ST
-#define ST st->u.whilem
-
- case WHILEM: /* just matched an A in /A*B/ (for complex A) */
- {
- /* see the discussion above about CURLYX/WHILEM */
- I32 n;
- assert(cur_curlyx); /* keep Coverity happy */
- n = ++cur_curlyx->u.curlyx.count; /* how many A's matched */
- ST.save_lastloc = cur_curlyx->u.curlyx.lastloc;
- ST.cache_offset = 0;
- ST.cache_mask = 0;
-
- PL_reginput = locinput;
-
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: matched %ld out of %ld..%ld\n",
- REPORT_CODE_OFF+depth*2, "", (long)n,
- (long)cur_curlyx->u.curlyx.min,
- (long)cur_curlyx->u.curlyx.max)
- );
-
- /* First just match a string of min A's. */
-
- if (n < cur_curlyx->u.curlyx.min) {
- cur_curlyx->u.curlyx.lastloc = locinput;
- PUSH_STATE_GOTO(WHILEM_A_pre, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
-
- /* If degenerate A matches "", assume A done. */
-
- if (locinput == cur_curlyx->u.curlyx.lastloc) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: empty match detected, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- goto do_whilem_B_max;
- }
-
- /* super-linear cache processing */
-
- if (scan->flags) {
-
- if (!PL_reg_maxiter) {
- /* start the countdown: Postpone detection until we
- * know the match is not *that* much linear. */
- PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4);
- /* possible overflow for long strings and many CURLYX's */
- if (PL_reg_maxiter < 0)
- PL_reg_maxiter = I32_MAX;
- PL_reg_leftiter = PL_reg_maxiter;
- }
-
- if (PL_reg_leftiter-- == 0) {
- /* initialise cache */
- const I32 size = (PL_reg_maxiter + 7)/8;
- if (PL_reg_poscache) {
- if ((I32)PL_reg_poscache_size < size) {
- Renew(PL_reg_poscache, size, char);
- PL_reg_poscache_size = size;
- }
- Zero(PL_reg_poscache, size, char);
- }
- else {
- PL_reg_poscache_size = size;
- Newxz(PL_reg_poscache, size, char);
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%swhilem: Detected a super-linear match, switching on caching%s...\n",
- PL_colors[4], PL_colors[5])
- );
- }
-
- if (PL_reg_leftiter < 0) {
- /* have we already failed at this position? */
- I32 offset, mask;
- offset = (scan->flags & 0xf) - 1
- + (locinput - PL_bostr) * (scan->flags>>4);
- mask = 1 << (offset % 8);
- offset /= 8;
- if (PL_reg_poscache[offset] & mask) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: (cache) already tried at this position...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- sayNO; /* cache records failure */
- }
- ST.cache_offset = offset;
- ST.cache_mask = mask;
- }
- }
-
- /* Prefer B over A for minimal matching. */
-
- if (cur_curlyx->u.curlyx.minmod) {
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- ST.cp = regcppush(ST.save_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_YES_STATE_GOTO(WHILEM_B_min, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
- }
-
- /* Prefer A over B for maximal matching. */
-
- if (n < cur_curlyx->u.curlyx.max) { /* More greed allowed? */
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- cur_curlyx->u.curlyx.lastloc = locinput;
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_max, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
- goto do_whilem_B_max;
- }
- /* NOTREACHED */
-
- case WHILEM_B_min: /* just matched B in a minimal match */
- case WHILEM_B_max: /* just matched B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case WHILEM_B_max_fail: /* just failed to match B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_min_fail: /* just failed to match A in a minimal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- /* FALL THROUGH */
- case WHILEM_A_pre_fail: /* just failed to match even minimal A */
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_max_fail: /* just failed to match A in a maximal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex); /* Restore some previous $<digit>s? */
- PL_reginput = locinput;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s whilem: failed, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- do_whilem_B_max:
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
-
- /* now try B */
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- PUSH_YES_STATE_GOTO(WHILEM_B_max, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
-
- case WHILEM_B_min_fail: /* just failed to match B in a minimal match */
- cur_curlyx = ST.save_curlyx;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
-
- if (cur_curlyx->u.curlyx.count >= cur_curlyx->u.curlyx.max) {
- /* Maximum greed exceeded */
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP),
- "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s trying longer...\n", REPORT_CODE_OFF+depth*2, "")
- );
- /* Try grabbing another A and see if it helps. */
- PL_reginput = locinput;
- cur_curlyx->u.curlyx.lastloc = locinput;
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_min, ST.save_curlyx->u.curlyx.A);
- /* NOTREACHED */
-
-#undef ST
-#define ST st->u.branch
-
- case BRANCHJ: /* /(...|A|...)/ with long next pointer */
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- scan = NEXTOPER(scan);
- /* FALL THROUGH */
-
- case BRANCH: /* /(...|A|...)/ */
- scan = NEXTOPER(scan); /* scan now points to inner node */
- ST.lastparen = *PL_reglastparen;
- ST.next_branch = next;
- REGCP_SET(ST.cp);
- PL_reginput = locinput;
-
- /* Now go into the branch */
- if (has_cutgroup) {
- PUSH_YES_STATE_GOTO(BRANCH_next, scan);
- } else {
- PUSH_STATE_GOTO(BRANCH_next, scan);
- }
- /* NOTREACHED */
- case CUTGROUP:
- PL_reginput = locinput;
- sv_yes_mark = st->u.mark.mark_name = scan->flags ? NULL :
- MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(CUTGROUP_next,next);
- /* NOTREACHED */
- case CUTGROUP_next_fail:
- do_cutgroup = 1;
- no_final = 1;
- if (st->u.mark.mark_name)
- sv_commit = st->u.mark.mark_name;
- sayNO;
- /* NOTREACHED */
- case BRANCH_next:
- sayYES;
- /* NOTREACHED */
- case BRANCH_next_fail: /* that branch failed; try the next, if any */
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- /*dmq: *PL_reglastcloseparen = n; */
- scan = ST.next_branch;
- /* no more branches? */
- if (!scan || (OP(scan) != BRANCH && OP(scan) != BRANCHJ)) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sBRANCH failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- sayNO_SILENT;
- }
- continue; /* execute next BRANCH[J] op */
- /* NOTREACHED */
-
- case MINMOD:
- minmod = 1;
- break;
-
-#undef ST
-#define ST st->u.curlym
-
- case CURLYM: /* /A{m,n}B/ where A is fixed-length */
-
- /* This is an optimisation of CURLYX that enables us to push
- * only a single backtracking state, no matter how many matches
- * there are in {m,n}. It relies on the pattern being constant
- * length, with no parens to influence future backrefs
- */
-
- ST.me = scan;
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
-
- /* if paren positive, emulate an OPEN/CLOSE around A */
- if (ST.me->flags) {
- U32 paren = ST.me->flags;
- if (paren > PL_regsize)
- PL_regsize = paren;
- if (paren > *PL_reglastparen)
- *PL_reglastparen = paren;
- scan += NEXT_OFF(scan); /* Skip former OPEN. */
- }
- ST.A = scan;
- ST.B = next;
- ST.alen = 0;
- ST.count = 0;
- ST.minmod = minmod;
- minmod = 0;
- ST.c1 = CHRTEST_UNINIT;
- REGCP_SET(ST.cp);
-
- if (!(ST.minmod ? ARG1(ST.me) : ARG2(ST.me))) /* min/max */
- goto curlym_do_B;
-
- curlym_do_A: /* execute the A in /A{m,n}B/ */
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYM_A, ST.A); /* match A */
- /* NOTREACHED */
-
- case CURLYM_A: /* we've just matched an A */
- locinput = st->locinput;
- nextchr = UCHARAT(locinput);
-
- ST.count++;
- /* after first match, determine A's length: u.curlym.alen */
- if (ST.count == 1) {
- if (PL_reg_match_utf8) {
- char *s = locinput;
- while (s < PL_reginput) {
- ST.alen++;
- s += UTF8SKIP(s);
- }
- }
- else {
- ST.alen = PL_reginput - locinput;
- }
- if (ST.alen == 0)
- ST.count = ST.minmod ? ARG1(ST.me) : ARG2(ST.me);
- }
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM now matched %"IVdf" times, len=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)), "",
- (IV) ST.count, (IV)ST.alen)
- );
-
- locinput = PL_reginput;
-
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- goto fake_end;
-
- {
- I32 max = (ST.minmod ? ARG1(ST.me) : ARG2(ST.me));
- if ( max == REG_INFTY || ST.count < max )
- goto curlym_do_A; /* try to match another A */
- }
- goto curlym_do_B; /* try to match B */
-
- case CURLYM_A_fail: /* just failed to match an A */
- REGCP_UNWIND(ST.cp);
-
- if (ST.minmod || ST.count < ARG1(ST.me) /* min*/
- || (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags))
- sayNO;
-
- curlym_do_B: /* execute the B in /A{m,n}B/ */
- PL_reginput = locinput;
- if (ST.c1 == CHRTEST_UNINIT) {
- /* calculate c1 and c2 for possible match of 1st char
- * following curly */
- ST.c1 = ST.c2 = CHRTEST_VOID;
- if (HAS_TEXT(ST.B) || JUMPABLE(ST.B)) {
- regnode *text_node = ST.B;
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
- /* this used to be
-
- (HAS_TEXT(text_node) && PL_regkind[OP(text_node)] == EXACT)
-
- But the former is redundant in light of the latter.
-
- if this changes back then the macro for
- IS_TEXT and friends need to change.
- */
- if (PL_regkind[OP(text_node)] == EXACT)
- {
-
- ST.c1 = (U8)*STRING(text_node);
- ST.c2 =
- (IS_TEXTF(text_node))
- ? PL_fold[ST.c1]
- : (IS_TEXTFL(text_node))
- ? PL_fold_locale[ST.c1]
- : ST.c1;
- }
- }
- }
-
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM trying tail with matches=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)),
- "", (IV)ST.count)
- );
- if (ST.c1 != CHRTEST_VOID
- && UCHARAT(PL_reginput) != ST.c1
- && UCHARAT(PL_reginput) != ST.c2)
- {
- /* simulate B failing */
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM Fast bail c1=%"IVdf" c2=%"IVdf"\n",
- (int)(REPORT_CODE_OFF+(depth*2)),"",
- (IV)ST.c1,(IV)ST.c2
- ));
- state_num = CURLYM_B_fail;
- goto reenter_switch;
- }
-
- if (ST.me->flags) {
- /* mark current A as captured */
- I32 paren = ST.me->flags;
- if (ST.count) {
- PL_regoffs[paren].start
- = HOPc(PL_reginput, -ST.alen) - PL_bostr;
- PL_regoffs[paren].end = PL_reginput - PL_bostr;
- /*dmq: *PL_reglastcloseparen = paren; */
- }
- else
- PL_regoffs[paren].end = -1;
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- {
- if (ST.count)
- goto fake_end;
- else
- sayNO;
- }
- }
-
- PUSH_STATE_GOTO(CURLYM_B, ST.B); /* match B */
- /* NOTREACHED */
-
- case CURLYM_B_fail: /* just failed to match a B */
- REGCP_UNWIND(ST.cp);
- if (ST.minmod) {
- I32 max = ARG2(ST.me);
- if (max != REG_INFTY && ST.count == max)
- sayNO;
- goto curlym_do_A; /* try to match a further A */
- }
- /* backtrack one A */
- if (ST.count == ARG1(ST.me) /* min */)
- sayNO;
- ST.count--;
- locinput = HOPc(locinput, -ST.alen);
- goto curlym_do_B; /* try to match B */
-
-#undef ST
-#define ST st->u.curly
-
-#define CURLY_SETPAREN(paren, success) \
- if (paren) { \
- if (success) { \
- PL_regoffs[paren].start = HOPc(locinput, -1) - PL_bostr; \
- PL_regoffs[paren].end = locinput - PL_bostr; \
- *PL_reglastcloseparen = paren; \
- } \
- else \
- PL_regoffs[paren].end = -1; \
- }
-
- case STAR: /* /A*B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 0;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case PLUS: /* /A+B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 1;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case CURLYN: /* /(A){m,n}B/ where A is width 1 */
- ST.paren = scan->flags; /* Which paren to set */
- if (ST.paren > PL_regsize)
- PL_regsize = ST.paren;
- if (ST.paren > *PL_reglastparen)
- *PL_reglastparen = ST.paren;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- ST.min=1;
- ST.max=1;
- }
- scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE);
- goto repeat;
- case CURLY: /* /A{m,n}B/ where A is width 1 */
- ST.paren = 0;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
- repeat:
- /*
- * Lookahead to avoid useless match attempts
- * when we know what character comes next.
- *
- * Used to only do .*x and .*?x, but now it allows
- * for )'s, ('s and (?{ ... })'s to be in the way
- * of the quantifier and the EXACT-like node. -- japhy
- */
-
- if (ST.min > ST.max) /* XXX make this a compile-time check? */
- sayNO;
- if (HAS_TEXT(next) || JUMPABLE(next)) {
- U8 *s;
- regnode *text_node = next;
-
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
-
- if (! HAS_TEXT(text_node))
- ST.c1 = ST.c2 = CHRTEST_VOID;
- else {
- if ( PL_regkind[OP(text_node)] != EXACT ) {
- ST.c1 = ST.c2 = CHRTEST_VOID;
- goto assume_ok_easy;
- }
- else
- s = (U8*)STRING(text_node);
-
- /* Currently we only get here when
-
- PL_rekind[OP(text_node)] == EXACT
-
- if this changes back then the macro for IS_TEXT and
- friends need to change. */
- if (!UTF) {
- ST.c2 = ST.c1 = *s;
- if (IS_TEXTF(text_node))
- ST.c2 = PL_fold[ST.c1];
- else if (IS_TEXTFL(text_node))
- ST.c2 = PL_fold_locale[ST.c1];
- }
- else { /* UTF */
- if (IS_TEXTF(text_node)) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- to_utf8_lower((U8*)s, tmpbuf1, &ulen1);
- to_utf8_upper((U8*)s, tmpbuf2, &ulen2);
-#ifdef EBCDIC
- ST.c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
- ST.c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
-#else
- ST.c1 = utf8n_to_uvuni(tmpbuf1, UTF8_MAXBYTES, 0,
- uniflags);
- ST.c2 = utf8n_to_uvuni(tmpbuf2, UTF8_MAXBYTES, 0,
- uniflags);
-#endif
- }
- else {
- ST.c2 = ST.c1 = utf8n_to_uvchr(s, UTF8_MAXBYTES, 0,
- uniflags);
- }
- }
- }
- }
- else
- ST.c1 = ST.c2 = CHRTEST_VOID;
- assume_ok_easy:
-
- ST.A = scan;
- ST.B = next;
- PL_reginput = locinput;
- if (minmod) {
- minmod = 0;
- if (ST.min && regrepeat(rex, ST.A, ST.min, depth) < ST.min)
- sayNO;
- ST.count = ST.min;
- locinput = PL_reginput;
- REGCP_SET(ST.cp);
- if (ST.c1 == CHRTEST_VOID)
- goto curly_try_B_min;
-
- ST.oldloc = locinput;
-
- /* set ST.maxpos to the furthest point along the
- * string that could possibly match */
- if (ST.max == REG_INFTY) {
- ST.maxpos = PL_regeol - 1;
- if (do_utf8)
- while (UTF8_IS_CONTINUATION(*(U8*)ST.maxpos))
- ST.maxpos--;
- }
- else if (do_utf8) {
- int m = ST.max - ST.min;
- for (ST.maxpos = locinput;
- m >0 && ST.maxpos + UTF8SKIP(ST.maxpos) <= PL_regeol; m--)
- ST.maxpos += UTF8SKIP(ST.maxpos);
- }
- else {
- ST.maxpos = locinput + ST.max - ST.min;
- if (ST.maxpos >= PL_regeol)
- ST.maxpos = PL_regeol - 1;
- }
- goto curly_try_B_min_known;
-
- }
- else {
- ST.count = regrepeat(rex, ST.A, ST.max, depth);
- locinput = PL_reginput;
- if (ST.count < ST.min)
- sayNO;
- if ((ST.count > ST.min)
- && (PL_regkind[OP(ST.B)] == EOL) && (OP(ST.B) != MEOL))
- {
- /* A{m,n} must come at the end of the string, there's
- * no point in backing off ... */
- ST.min = ST.count;
- /* ...except that $ and \Z can match before *and* after
- newline at the end. Consider "\n\n" =~ /\n+\Z\n/.
- We may back off by one in this case. */
- if (UCHARAT(PL_reginput - 1) == '\n' && OP(ST.B) != EOS)
- ST.min--;
- }
- REGCP_SET(ST.cp);
- goto curly_try_B_max;
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_known_fail:
- /* failed to find B in a non-greedy match where c1,c2 valid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- PL_reginput = locinput; /* Could be reset... */
- REGCP_UNWIND(ST.cp);
- /* Couldn't or didn't -- move forward. */
- ST.oldloc = locinput;
- if (do_utf8)
- locinput += UTF8SKIP(locinput);
- else
- locinput++;
- ST.count++;
- curly_try_B_min_known:
- /* find the next place where 'B' could work, then call B */
- {
- int n;
- if (do_utf8) {
- n = (ST.oldloc == locinput) ? 0 : 1;
- if (ST.c1 == ST.c2) {
- STRLEN len;
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos &&
- utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags) != (UV)ST.c1) {
- locinput += len;
- n++;
- }
- }
- else {
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos) {
- STRLEN len;
- const UV c = utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags);
- if (c == (UV)ST.c1 || c == (UV)ST.c2)
- break;
- locinput += len;
- n++;
- }
- }
- }
- else {
- if (ST.c1 == ST.c2) {
- while (locinput <= ST.maxpos &&
- UCHARAT(locinput) != ST.c1)
- locinput++;
- }
- else {
- while (locinput <= ST.maxpos
- && UCHARAT(locinput) != ST.c1
- && UCHARAT(locinput) != ST.c2)
- locinput++;
- }
- n = locinput - ST.oldloc;
- }
- if (locinput > ST.maxpos)
- sayNO;
- /* PL_reginput == oldloc now */
- if (n) {
- ST.count += n;
- if (regrepeat(rex, ST.A, n, depth) < n)
- sayNO;
- }
- PL_reginput = locinput;
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min_known, ST.B);
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_fail:
- /* failed to find B in a non-greedy match where c1,c2 invalid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* failed -- move forward one */
- PL_reginput = locinput;
- if (regrepeat(rex, ST.A, 1, depth)) {
- ST.count++;
- locinput = PL_reginput;
- if (ST.count <= ST.max || (ST.max == REG_INFTY &&
- ST.count > 0)) /* count overflow ? */
- {
- curly_try_B_min:
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min, ST.B);
- }
- }
- sayNO;
- /* NOTREACHED */
-
-
- curly_try_B_max:
- /* a successful greedy match: now try to match B */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- {
- UV c = 0;
- if (ST.c1 != CHRTEST_VOID)
- c = do_utf8 ? utf8n_to_uvchr((U8*)PL_reginput,
- UTF8_MAXBYTES, 0, uniflags)
- : (UV) UCHARAT(PL_reginput);
- /* If it could work, try it. */
- if (ST.c1 == CHRTEST_VOID || c == (UV)ST.c1 || c == (UV)ST.c2) {
- CURLY_SETPAREN(ST.paren, ST.count);
- PUSH_STATE_GOTO(CURLY_B_max, ST.B);
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case CURLY_B_max_fail:
- /* failed to find B in a greedy match */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* back up. */
- if (--ST.count < ST.min)
- sayNO;
- PL_reginput = locinput = HOPc(locinput, -1);
- goto curly_try_B_max;
-
-#undef ST
-
- case END:
- fake_end:
- if (cur_eval) {
- /* we've just finished A in /(??{A})B/; now continue with B */
- I32 tmpix;
- st->u.eval.toggle_reg_flags
- = cur_eval->u.eval.toggle_reg_flags;
- PL_reg_flags ^= st->u.eval.toggle_reg_flags;
-
- st->u.eval.prev_rex = rex_sv; /* inner */
- SETREX(rex_sv,cur_eval->u.eval.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- cur_curlyx = cur_eval->u.eval.prev_curlyx;
- ReREFCNT_inc(rex_sv);
- st->u.eval.cp = regcppush(0); /* Save *all* the positions. */
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- REGCP_SET(st->u.eval.lastcp);
- PL_reginput = locinput;
-
- /* Restore parens of the outer rex without popping the
- * savestack */
- tmpix = PL_savestack_ix;
- PL_savestack_ix = cur_eval->u.eval.lastcp;
- regcppop(rex);
- PL_savestack_ix = tmpix;
-
- st->u.eval.prev_eval = cur_eval;
- cur_eval = cur_eval->u.eval.prev_eval;
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log, "%*s EVAL trying tail ... %"UVxf"\n",
- REPORT_CODE_OFF+depth*2, "",PTR2UV(cur_eval)););
- if ( nochange_depth )
- nochange_depth--;
-
- PUSH_YES_STATE_GOTO(EVAL_AB,
- st->u.eval.prev_eval->u.eval.B); /* match B */
- }
-
- if (locinput < reginfo->till) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n",
- PL_colors[4],
- (long)(locinput - PL_reg_starttry),
- (long)(reginfo->till - PL_reg_starttry),
- PL_colors[5]));
-
- sayNO_SILENT; /* Cannot match: too short. */
- }
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
- case SUCCEED: /* successful SUSPEND/UNLESSM/IFMATCH/CURLYM */
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %ssubpattern success...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]));
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
-#undef ST
-#define ST st->u.ifmatch
-
- case SUSPEND: /* (?>A) */
- ST.wanted = 1;
- PL_reginput = locinput;
- goto do_ifmatch;
-
- case UNLESSM: /* -ve lookaround: (?!A), or with flags, (?<!A) */
- ST.wanted = 0;
- goto ifmatch_trivial_fail_test;
-
- case IFMATCH: /* +ve lookaround: (?=A), or with flags, (?<=A) */
- ST.wanted = 1;
- ifmatch_trivial_fail_test:
- if (scan->flags) {
- char * const s = HOPBACKc(locinput, scan->flags);
- if (!s) {
- /* trivial fail */
- if (logical) {
- logical = 0;
- sw = 1 - (bool)ST.wanted;
- }
- else if (ST.wanted)
- sayNO;
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- }
- PL_reginput = s;
- }
- else
- PL_reginput = locinput;
-
- do_ifmatch:
- ST.me = scan;
- ST.logical = logical;
- logical = 0; /* XXX: reset state of logical once it has been saved into ST */
-
- /* execute body of (?...A) */
- PUSH_YES_STATE_GOTO(IFMATCH_A, NEXTOPER(NEXTOPER(scan)));
- /* NOTREACHED */
-
- case IFMATCH_A_fail: /* body of (?...A) failed */
- ST.wanted = !ST.wanted;
- /* FALL THROUGH */
-
- case IFMATCH_A: /* body of (?...A) succeeded */
- if (ST.logical) {
- sw = (bool)ST.wanted;
- }
- else if (!ST.wanted)
- sayNO;
-
- if (OP(ST.me) == SUSPEND)
- locinput = PL_reginput;
- else {
- locinput = PL_reginput = st->locinput;
- nextchr = UCHARAT(locinput);
- }
- scan = ST.me + ARG(ST.me);
- if (scan == ST.me)
- scan = NULL;
- continue; /* execute B */
-
-#undef ST
-
- case LONGJMP:
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- case COMMIT:
- reginfo->cutpoint = PL_regeol;
- /* FALLTHROUGH */
- case PRUNE:
- PL_reginput = locinput;
- if (!scan->flags)
- sv_yes_mark = sv_commit = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(COMMIT_next,next);
- /* NOTREACHED */
- case COMMIT_next_fail:
- no_final = 1;
- /* FALLTHROUGH */
- case OPFAIL:
- sayNO;
- /* NOTREACHED */
-
-#define ST st->u.mark
- case MARKPOINT:
- ST.prev_mark = mark_state;
- ST.mark_name = sv_commit = sv_yes_mark
- = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- mark_state = st;
- ST.mark_loc = PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(MARKPOINT_next,next);
- /* NOTREACHED */
- case MARKPOINT_next:
- mark_state = ST.prev_mark;
- sayYES;
- /* NOTREACHED */
- case MARKPOINT_next_fail:
- if (popmark && sv_eq(ST.mark_name,popmark))
- {
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- popmark = NULL; /* we found our mark */
- sv_commit = ST.mark_name;
-
- DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,
- "%*s %ssetting cutpoint to mark:%"SVf"...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], SVfARG(sv_commit), PL_colors[5]);
- });
- }
- mark_state = ST.prev_mark;
- sv_yes_mark = mark_state ?
- mark_state->u.mark.mark_name : NULL;
- sayNO;
- /* NOTREACHED */
- case SKIP:
- PL_reginput = locinput;
- if (scan->flags) {
- /* (*SKIP) : if we fail we cut here*/
- ST.mark_name = NULL;
- ST.mark_loc = locinput;
- PUSH_STATE_GOTO(SKIP_next,next);
- } else {
- /* (*SKIP:NAME) : if there is a (*MARK:NAME) fail where it was,
- otherwise do nothing. Meaning we need to scan
- */
- regmatch_state *cur = mark_state;
- SV *find = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
-
- while (cur) {
- if ( sv_eq( cur->u.mark.mark_name,
- find ) )
- {
- ST.mark_name = find;
- PUSH_STATE_GOTO( SKIP_next, next );
- }
- cur = cur->u.mark.prev_mark;
- }
- }
- /* Didn't find our (*MARK:NAME) so ignore this (*SKIP:NAME) */
- break;
- case SKIP_next_fail:
- if (ST.mark_name) {
- /* (*CUT:NAME) - Set up to search for the name as we
- collapse the stack*/
- popmark = ST.mark_name;
- } else {
- /* (*CUT) - No name, we cut here.*/
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- /* but we set sv_commit to latest mark_name if there
- is one so they can test to see how things lead to this
- cut */
- if (mark_state)
- sv_commit=mark_state->u.mark.mark_name;
- }
- no_final = 1;
- sayNO;
- /* NOTREACHED */
-#undef ST
- case FOLDCHAR:
- n = ARG(scan);
- if ( n == (U32)what_len_TRICKYFOLD(locinput,do_utf8,ln) ) {
- locinput += ln;
- } else if ( 0xDF == n && !do_utf8 && !UTF ) {
- sayNO;
- } else {
- U8 folded[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const char * const l = locinput;
- char *e = PL_regeol;
- to_uni_fold(n, folded, &foldlen);
-
- if (ibcmp_utf8((const char*) folded, 0, foldlen, 1,
- l, &e, 0, do_utf8)) {
- sayNO;
- }
- locinput = e;
- }
- nextchr = UCHARAT(locinput);
- break;
- case LNBREAK:
- if ((n=is_LNBREAK(locinput,do_utf8))) {
- locinput += n;
- nextchr = UCHARAT(locinput);
- } else
- sayNO;
- break;
-
-#define CASE_CLASS(nAmE) \
- case nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- locinput += n; \
- nextchr = UCHARAT(locinput); \
- } else \
- sayNO; \
- break; \
- case N##nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- sayNO; \
- } else { \
- locinput += UTF8SKIP(locinput); \
- nextchr = UCHARAT(locinput); \
- } \
- break
-
- CASE_CLASS(VERTWS);
- CASE_CLASS(HORIZWS);
-#undef CASE_CLASS
-
- default:
- PerlIO_printf(Perl_error_log, "%"UVxf" %d\n",
- PTR2UV(scan), OP(scan));
- Perl_croak(aTHX_ "regexp memory corruption");
-
- } /* end switch */
-
- /* switch break jumps here */
- scan = next; /* prepare to execute the next op and ... */
- continue; /* ... jump back to the top, reusing st */
- /* NOTREACHED */
-
- push_yes_state:
- /* push a state that backtracks on success */
- st->u.yes.prev_yes_state = yes_state;
- yes_state = st;
- /* FALL THROUGH */
- push_state:
- /* push a new regex state, then continue at scan */
- {
- regmatch_state *newst;
-
- DEBUG_STACK_r({
- regmatch_state *cur = st;
- regmatch_state *curyes = yes_state;
- int curd = depth;
- regmatch_slab *slab = PL_regmatch_slab;
- for (;curd > -1;cur--,curd--) {
- if (cur < SLAB_FIRST(slab)) {
- slab = slab->prev;
- cur = SLAB_LAST(slab);
- }
- PerlIO_printf(Perl_error_log, "%*s#%-3d %-10s %s\n",
- REPORT_CODE_OFF + 2 + depth * 2,"",
- curd, PL_reg_name[cur->resume_state],
- (curyes == cur) ? "yes" : ""
- );
- if (curyes == cur)
- curyes = cur->u.yes.prev_yes_state;
- }
- } else
- DEBUG_STATE_pp("push")
- );
- depth++;
- st->locinput = locinput;
- newst = st+1;
- if (newst > SLAB_LAST(PL_regmatch_slab))
- newst = S_push_slab(aTHX);
- PL_regmatch_state = newst;
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- st = newst;
- continue;
- /* NOTREACHED */
- }
- }
-
- /*
- * We get here only if there's trouble -- normally "case END" is
- * the terminating point.
- */
- Perl_croak(aTHX_ "corrupted regexp pointers");
- /*NOTREACHED*/
- sayNO;
-
-yes:
- if (yes_state) {
- /* we have successfully completed a subexpression, but we must now
- * pop to the state marked by yes_state and continue from there */
- assert(st != yes_state);
-#ifdef DEBUGGING
- while (st != yes_state) {
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- DEBUG_STATE_r({
- if (no_final) {
- DEBUG_STATE_pp("pop (no final)");
- } else {
- DEBUG_STATE_pp("pop (yes)");
- }
- });
- depth--;
- }
-#else
- while (yes_state < SLAB_FIRST(PL_regmatch_slab)
- || yes_state > SLAB_LAST(PL_regmatch_slab))
- {
- /* not in this slab, pop slab */
- depth -= (st - SLAB_FIRST(PL_regmatch_slab) + 1);
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- depth -= (st - yes_state);
-#endif
- st = yes_state;
- yes_state = st->u.yes.prev_yes_state;
- PL_regmatch_state = st;
-
- if (no_final) {
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
- }
- state_num = st->resume_state + no_final;
- goto reenter_switch;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n",
- PL_colors[4], PL_colors[5]));
-
- if (PL_reg_eval_set) {
- /* each successfully executed (?{...}) block does the equivalent of
- * local $^R = do {...}
- * When popping the save stack, all these locals would be undone;
- * bypass this by setting the outermost saved $^R to the latest
- * value */
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- }
- result = 1;
- goto final_exit;
-
-no:
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], PL_colors[5])
- );
-
-no_silent:
- if (no_final) {
- if (yes_state) {
- goto yes;
- } else {
- goto final_exit;
- }
- }
- if (depth) {
- /* there's a previous state to backtrack to */
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- PL_regmatch_state = st;
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
-
- DEBUG_STATE_pp("pop");
- depth--;
- if (yes_state == st)
- yes_state = st->u.yes.prev_yes_state;
-
- state_num = st->resume_state + 1; /* failure = success + 1 */
- goto reenter_switch;
- }
- result = 0;
-
- final_exit:
- if (rex->intflags & PREGf_VERBARG_SEEN) {
- SV *sv_err = get_sv("REGERROR", 1);
- SV *sv_mrk = get_sv("REGMARK", 1);
- if (result) {
- sv_commit = &PL_sv_no;
- if (!sv_yes_mark)
- sv_yes_mark = &PL_sv_yes;
- } else {
- if (!sv_commit)
- sv_commit = &PL_sv_yes;
- sv_yes_mark = &PL_sv_no;
- }
- sv_setsv(sv_err, sv_commit);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- /* clean up; in particular, free all slabs above current one */
- LEAVE_SCOPE(oldsave);
-
- return result;
-}
-
-/*
- - regrepeat - repeatedly match something simple, report how many
- */
-/*
- * [This routine now assumes that it will only match on things of length 1.
- * That was true before, but now we assume scan - reginput is the count,
- * rather than incrementing count on every character. [Er, except utf8.]]
- */
-STATIC I32
-S_regrepeat(pTHX_ const regexp *prog, const regnode *p, I32 max, int depth)
-{
- dVAR;
- register char *scan;
- register I32 c;
- register char *loceol = PL_regeol;
- register I32 hardcount = 0;
- register bool do_utf8 = PL_reg_match_utf8;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_REGREPEAT;
-
- scan = PL_reginput;
- if (max == REG_INFTY)
- max = I32_MAX;
- else if (max < loceol - scan)
- loceol = scan + max;
- switch (OP(p)) {
- case REG_ANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max && *scan != '\n') {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && *scan != '\n')
- scan++;
- }
- break;
- case SANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- }
- else
- scan = loceol;
- break;
- case CANY:
- scan = loceol;
- break;
- case EXACT: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol && UCHARAT(scan) == c)
- scan++;
- break;
- case EXACTF: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c]))
- scan++;
- break;
- case EXACTFL: /* length of string is 1 */
- PL_reg_flags |= RF_tainted;
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c]))
- scan++;
- break;
- case ANYOF:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- reginclass(prog, p, (U8*)scan, 0, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && REGINCLASS(prog, p, (U8*)scan))
- scan++;
- }
- break;
- case ALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM(*scan))
- scan++;
- }
- break;
- case ALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM_LC(*scan))
- scan++;
- }
- break;
- case NALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM(*scan))
- scan++;
- }
- break;
- case NALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM_LC(*scan))
- scan++;
- }
- break;
- case SPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE(*scan))
- scan++;
- }
- break;
- case SPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE_LC(*scan))
- scan++;
- }
- break;
- case NSPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE(*scan))
- scan++;
- }
- break;
- case NSPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE_LC(*scan))
- scan++;
- }
- break;
- case DIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isDIGIT(*scan))
- scan++;
- }
- break;
- case NDIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isDIGIT(*scan))
- scan++;
- }
- case LNBREAK:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_LNBREAK_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- /*
- LNBREAK can match two latin chars, which is ok,
- because we have a null terminated string, but we
- have to use hardcount in this situation
- */
- while (scan < loceol && (c=is_LNBREAK_latin1(scan))) {
- scan+=c;
- hardcount++;
- }
- }
- break;
- case HORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_HORIZWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_HORIZWS_latin1(scan))
- scan++;
- }
- break;
- case NHORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_HORIZWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_HORIZWS_latin1(scan))
- scan++;
-
- }
- break;
- case VERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_VERTWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
- case NVERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_VERTWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
-
- default: /* Called on something of 0 width. */
- break; /* So match right here or not at all. */
- }
-
- if (hardcount)
- c = hardcount;
- else
- c = scan - PL_reginput;
- PL_reginput = scan;
-
- DEBUG_r({
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, p);
- PerlIO_printf(Perl_debug_log,
- "%*s %s can match %"IVdf" times out of %"IVdf"...\n",
- REPORT_CODE_OFF + depth*2, "", SvPVX_const(prop),(IV)c,(IV)max);
- });
- });
-
- return(c);
-}
-
-
-#if !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION)
-/*
-- regclass_swash - prepare the utf8 swash
-*/
-
-SV *
-Perl_regclass_swash(pTHX_ const regexp *prog, register const regnode* node, bool doinit, SV** listsvp, SV **altsvp)
-{
- dVAR;
- SV *sw = NULL;
- SV *si = NULL;
- SV *alt = NULL;
- RXi_GET_DECL(prog,progi);
- const struct reg_data * const data = prog ? progi->data : NULL;
-
- PERL_ARGS_ASSERT_REGCLASS_SWASH;
-
- if (data && data->count) {
- const U32 n = ARG(node);
-
- if (data->what[n] == 's') {
- SV * const rv = MUTABLE_SV(data->data[n]);
- AV * const av = MUTABLE_AV(SvRV(rv));
- SV **const ary = AvARRAY(av);
- SV **a, **b;
-
- /* See the end of regcomp.c:S_regclass() for
- * documentation of these array elements. */
-
- si = *ary;
- a = SvROK(ary[1]) ? &ary[1] : NULL;
- b = SvTYPE(ary[2]) == SVt_PVAV ? &ary[2] : NULL;
-
- if (a)
- sw = *a;
- else if (si && doinit) {
- sw = swash_init("utf8", "", si, 1, 0);
- (void)av_store(av, 1, sw);
- }
- if (b)
- alt = *b;
- }
- }
-
- if (listsvp)
- *listsvp = si;
- if (altsvp)
- *altsvp = alt;
-
- return sw;
-}
-#endif
-
-/*
- - reginclass - determine if a character falls into a character class
-
- The n is the ANYOF regnode, the p is the target string, lenp
- is pointer to the maximum length of how far to go in the p
- (if the lenp is zero, UTF8SKIP(p) is used),
- do_utf8 tells whether the target string is in UTF-8.
-
- */
-
-STATIC bool
-S_reginclass(pTHX_ const regexp *prog, register const regnode *n, register const U8* p, STRLEN* lenp, register bool do_utf8)
-{
- dVAR;
- const char flags = ANYOF_FLAGS(n);
- bool match = FALSE;
- UV c = *p;
- STRLEN len = 0;
- STRLEN plen;
-
- PERL_ARGS_ASSERT_REGINCLASS;
-
- if (do_utf8 && !UTF8_IS_INVARIANT(c)) {
- c = utf8n_to_uvchr(p, UTF8_MAXBYTES, &len,
- (UTF8_ALLOW_DEFAULT & UTF8_ALLOW_ANYUV) | UTF8_CHECK_ONLY);
- /* see [perl #37836] for UTF8_ALLOW_ANYUV */
- if (len == (STRLEN)-1)
- Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)");
- }
-
- plen = lenp ? *lenp : UNISKIP(NATIVE_TO_UNI(c));
- if (do_utf8 || (flags & ANYOF_UNICODE)) {
- if (lenp)
- *lenp = 0;
- if (do_utf8 && !ANYOF_RUNTIME(n)) {
- if (len != (STRLEN)-1 && c < 256 && ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- }
- if (!match && do_utf8 && (flags & ANYOF_UNICODE_ALL) && c >= 256)
- match = TRUE;
- if (!match) {
- AV *av;
- SV * const sw = regclass_swash(prog, n, TRUE, 0, (SV**)&av);
-
- if (sw) {
- U8 * utf8_p;
- if (do_utf8) {
- utf8_p = (U8 *) p;
- } else {
- STRLEN len = 1;
- utf8_p = bytes_to_utf8(p, &len);
- }
- if (swash_fetch(sw, utf8_p, 1))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- if (!match && lenp && av) {
- I32 i;
- for (i = 0; i <= av_len(av); i++) {
- SV* const sv = *av_fetch(av, i, FALSE);
- STRLEN len;
- const char * const s = SvPV_const(sv, len);
- if (len <= plen && memEQ(s, (char*)utf8_p, len)) {
- *lenp = len;
- match = TRUE;
- break;
- }
- }
- }
- if (!match) {
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1];
-
- STRLEN tmplen;
- to_utf8_fold(utf8_p, tmpbuf, &tmplen);
- if (swash_fetch(sw, tmpbuf, 1))
- match = TRUE;
- }
- }
-
- /* If we allocated a string above, free it */
- if (! do_utf8) Safefree(utf8_p);
- }
- }
- if (match && lenp && *lenp == 0)
- *lenp = UNISKIP(NATIVE_TO_UNI(c));
- }
- if (!match && c < 256) {
- if (ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- U8 f;
-
- if (flags & ANYOF_LOCALE) {
- PL_reg_flags |= RF_tainted;
- f = PL_fold_locale[c];
- }
- else
- f = PL_fold[c];
- if (f != c && ANYOF_BITMAP_TEST(n, f))
- match = TRUE;
- }
-
- if (!match && (flags & ANYOF_CLASS)) {
- PL_reg_flags |= RF_tainted;
- if (
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK(c))
- ) /* How's that for a conditional? */
- {
- match = TRUE;
- }
- }
- }
-
- return (flags & ANYOF_INVERT) ? !match : match;
-}
-
-STATIC U8 *
-S_reghop3(U8 *s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-
-#ifdef XXX_dmq
-/* there are a bunch of places where we use two reghop3's that should
- be replaced with this routine. but since thats not done yet
- we ifdef it out - dmq
-*/
-STATIC U8 *
-S_reghop4(U8 *s, I32 off, const U8* llim, const U8* rlim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP4;
-
- if (off >= 0) {
- while (off-- && s < rlim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > llim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > llim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-#endif
-
-STATIC U8 *
-S_reghopmaybe3(U8* s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOPMAYBE3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- if (off >= 0)
- return NULL;
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- if (off <= 0)
- return NULL;
- }
- return s;
-}
-
-static void
-restore_pos(pTHX_ void *arg)
-{
- dVAR;
- regexp * const rex = (regexp *)arg;
- if (PL_reg_eval_set) {
- if (PL_reg_oldsaved) {
- rex->subbeg = PL_reg_oldsaved;
- rex->sublen = PL_reg_oldsavedlen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- rex->saved_copy = PL_nrs;
-#endif
- RXp_MATCH_COPIED_on(rex);
- }
- PL_reg_magic->mg_len = PL_reg_oldpos;
- PL_reg_eval_set = 0;
- PL_curpm = PL_reg_oldcurpm;
- }
-}
-
-STATIC void
-S_to_utf8_substr(pTHX_ register regexp *prog)
-{
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_UTF8_SUBSTR;
-
- do {
- if (prog->substrs->data[i].substr
- && !prog->substrs->data[i].utf8_substr) {
- SV* const sv = newSVsv(prog->substrs->data[i].substr);
- prog->substrs->data[i].utf8_substr = sv;
- sv_utf8_upgrade(sv);
- if (SvVALID(prog->substrs->data[i].substr)) {
- const U8 flags = BmFLAGS(prog->substrs->data[i].substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- /* Whilst this makes the SV technically "invalid" (as its
- buffer is no longer followed by "\0") when fbm_compile()
- adds the "\n" back, a "\0" is restored. */
- }
- fbm_compile(sv, flags);
- }
- if (prog->substrs->data[i].substr == prog->check_substr)
- prog->check_utf8 = sv;
- }
- } while (i--);
-}
-
-STATIC void
-S_to_byte_substr(pTHX_ register regexp *prog)
-{
- dVAR;
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_BYTE_SUBSTR;
-
- do {
- if (prog->substrs->data[i].utf8_substr
- && !prog->substrs->data[i].substr) {
- SV* sv = newSVsv(prog->substrs->data[i].utf8_substr);
- if (sv_utf8_downgrade(sv, TRUE)) {
- if (SvVALID(prog->substrs->data[i].utf8_substr)) {
- const U8 flags
- = BmFLAGS(prog->substrs->data[i].utf8_substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- }
- fbm_compile(sv, flags);
- }
- } else {
- SvREFCNT_dec(sv);
- sv = &PL_sv_undef;
- }
- prog->substrs->data[i].substr = sv;
- if (prog->substrs->data[i].utf8_substr == prog->check_utf8)
- prog->check_substr = sv;
- }
- } while (i--);
-}
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regcomp.c
- */
-
-/*
- * 'A fair jaw-cracker dwarf-language must be.' --Samwise Gamgee
- *
- * [p.285 of _The Lord of the Rings_, II/iii: "The Ring Goes South"]
- */
-
-/* This file contains functions for compiling a regular expression. See
- * also regexec.c which funnily enough, contains functions for executing
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_comp.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
-
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGCOMP_C
-#include "perl.h"
-
-#ifndef PERL_IN_XSUB_RE
-#include "re_defs.h"
-#endif
-
-#define REG_COMP_C
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#ifdef op
-#undef op
-#endif /* op */
-
-#ifdef MSDOS
-# if defined(BUGGY_MSC6)
- /* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */
-# pragma optimize("a",off)
- /* But MSC 6.00A is happy with 'w', for aliases only across function calls*/
-# pragma optimize("w",on )
-# endif /* BUGGY_MSC6 */
-#endif /* MSDOS */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-typedef struct RExC_state_t {
- U32 flags; /* are we folding, multilining? */
- char *precomp; /* uncompiled string. */
- REGEXP *rx_sv; /* The SV that is the regexp. */
- regexp *rx; /* perl core regexp structure */
- regexp_internal *rxi; /* internal data for regexp object pprivate field */
- char *start; /* Start of input for compile */
- char *end; /* End of input for compile */
- char *parse; /* Input-scan pointer. */
- I32 whilem_seen; /* number of WHILEM in this expr */
- regnode *emit_start; /* Start of emitted-code area */
- regnode *emit_bound; /* First regnode outside of the allocated space */
- regnode *emit; /* Code-emit pointer; ®dummy = don't = compiling */
- I32 naughty; /* How bad is this pattern? */
- I32 sawback; /* Did we see \1, ...? */
- U32 seen;
- I32 size; /* Code size. */
- I32 npar; /* Capture buffer count, (OPEN). */
- I32 cpar; /* Capture buffer count, (CLOSE). */
- I32 nestroot; /* root parens we are in - used by accept */
- I32 extralen;
- I32 seen_zerolen;
- I32 seen_evals;
- regnode **open_parens; /* pointers to open parens */
- regnode **close_parens; /* pointers to close parens */
- regnode *opend; /* END node in program */
- I32 utf8; /* whether the pattern is utf8 or not */
- I32 orig_utf8; /* whether the pattern was originally in utf8 */
- /* XXX use this for future optimisation of case
- * where pattern must be upgraded to utf8. */
- HV *charnames; /* cache of named sequences */
- HV *paren_names; /* Paren names */
-
- regnode **recurse; /* Recurse regops */
- I32 recurse_count; /* Number of recurse regops */
-#if ADD_TO_REGEXEC
- char *starttry; /* -Dr: where regtry was called. */
-#define RExC_starttry (pRExC_state->starttry)
-#endif
-#ifdef DEBUGGING
- const char *lastparse;
- I32 lastnum;
- AV *paren_name_list; /* idx -> name */
-#define RExC_lastparse (pRExC_state->lastparse)
-#define RExC_lastnum (pRExC_state->lastnum)
-#define RExC_paren_name_list (pRExC_state->paren_name_list)
-#endif
-} RExC_state_t;
-
-#define RExC_flags (pRExC_state->flags)
-#define RExC_precomp (pRExC_state->precomp)
-#define RExC_rx_sv (pRExC_state->rx_sv)
-#define RExC_rx (pRExC_state->rx)
-#define RExC_rxi (pRExC_state->rxi)
-#define RExC_start (pRExC_state->start)
-#define RExC_end (pRExC_state->end)
-#define RExC_parse (pRExC_state->parse)
-#define RExC_whilem_seen (pRExC_state->whilem_seen)
-#ifdef RE_TRACK_PATTERN_OFFSETS
-#define RExC_offsets (pRExC_state->rxi->u.offsets) /* I am not like the others */
-#endif
-#define RExC_emit (pRExC_state->emit)
-#define RExC_emit_start (pRExC_state->emit_start)
-#define RExC_emit_bound (pRExC_state->emit_bound)
-#define RExC_naughty (pRExC_state->naughty)
-#define RExC_sawback (pRExC_state->sawback)
-#define RExC_seen (pRExC_state->seen)
-#define RExC_size (pRExC_state->size)
-#define RExC_npar (pRExC_state->npar)
-#define RExC_nestroot (pRExC_state->nestroot)
-#define RExC_extralen (pRExC_state->extralen)
-#define RExC_seen_zerolen (pRExC_state->seen_zerolen)
-#define RExC_seen_evals (pRExC_state->seen_evals)
-#define RExC_utf8 (pRExC_state->utf8)
-#define RExC_orig_utf8 (pRExC_state->orig_utf8)
-#define RExC_charnames (pRExC_state->charnames)
-#define RExC_open_parens (pRExC_state->open_parens)
-#define RExC_close_parens (pRExC_state->close_parens)
-#define RExC_opend (pRExC_state->opend)
-#define RExC_paren_names (pRExC_state->paren_names)
-#define RExC_recurse (pRExC_state->recurse)
-#define RExC_recurse_count (pRExC_state->recurse_count)
-
-
-#define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?')
-#define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \
- ((*s) == '{' && regcurly(s)))
-
-#ifdef SPSTART
-#undef SPSTART /* dratted cpp namespace... */
-#endif
-/*
- * Flags to be passed up and down.
- */
-#define WORST 0 /* Worst case. */
-#define HASWIDTH 0x01 /* Known to match non-null strings. */
-#define SIMPLE 0x02 /* Simple enough to be STAR/PLUS operand. */
-#define SPSTART 0x04 /* Starts with * or +. */
-#define TRYAGAIN 0x08 /* Weeded out a declaration. */
-#define POSTPONED 0x10 /* (?1),(?&name), (??{...}) or similar */
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-RExC_emit_start) : -1)
-
-/* whether trie related optimizations are enabled */
-#if PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION
-#define TRIE_STUDY_OPT
-#define FULL_TRIE_STUDY
-#define TRIE_STCLASS
-#endif
-
-
-
-#define PBYTE(u8str,paren) ((U8*)(u8str))[(paren) >> 3]
-#define PBITVAL(paren) (1 << ((paren) & 7))
-#define PAREN_TEST(u8str,paren) ( PBYTE(u8str,paren) & PBITVAL(paren))
-#define PAREN_SET(u8str,paren) PBYTE(u8str,paren) |= PBITVAL(paren)
-#define PAREN_UNSET(u8str,paren) PBYTE(u8str,paren) &= (~PBITVAL(paren))
-
-
-/* About scan_data_t.
-
- During optimisation we recurse through the regexp program performing
- various inplace (keyhole style) optimisations. In addition study_chunk
- and scan_commit populate this data structure with information about
- what strings MUST appear in the pattern. We look for the longest
- string that must appear for at a fixed location, and we look for the
- longest string that may appear at a floating location. So for instance
- in the pattern:
-
- /FOO[xX]A.*B[xX]BAR/
-
- Both 'FOO' and 'A' are fixed strings. Both 'B' and 'BAR' are floating
- strings (because they follow a .* construct). study_chunk will identify
- both FOO and BAR as being the longest fixed and floating strings respectively.
-
- The strings can be composites, for instance
-
- /(f)(o)(o)/
-
- will result in a composite fixed substring 'foo'.
-
- For each string some basic information is maintained:
-
- - offset or min_offset
- This is the position the string must appear at, or not before.
- It also implicitly (when combined with minlenp) tells us how many
- character must match before the string we are searching.
- Likewise when combined with minlenp and the length of the string
- tells us how many characters must appear after the string we have
- found.
-
- - max_offset
- Only used for floating strings. This is the rightmost point that
- the string can appear at. Ifset to I32 max it indicates that the
- string can occur infinitely far to the right.
-
- - minlenp
- A pointer to the minimum length of the pattern that the string
- was found inside. This is important as in the case of positive
- lookahead or positive lookbehind we can have multiple patterns
- involved. Consider
-
- /(?=FOO).*F/
-
- The minimum length of the pattern overall is 3, the minimum length
- of the lookahead part is 3, but the minimum length of the part that
- will actually match is 1. So 'FOO's minimum length is 3, but the
- minimum length for the F is 1. This is important as the minimum length
- is used to determine offsets in front of and behind the string being
- looked for. Since strings can be composites this is the length of the
- pattern at the time it was commited with a scan_commit. Note that
- the length is calculated by study_chunk, so that the minimum lengths
- are not known until the full pattern has been compiled, thus the
- pointer to the value.
-
- - lookbehind
-
- In the case of lookbehind the string being searched for can be
- offset past the start point of the final matching string.
- If this value was just blithely removed from the min_offset it would
- invalidate some of the calculations for how many chars must match
- before or after (as they are derived from min_offset and minlen and
- the length of the string being searched for).
- When the final pattern is compiled and the data is moved from the
- scan_data_t structure into the regexp structure the information
- about lookbehind is factored in, with the information that would
- have been lost precalculated in the end_shift field for the
- associated string.
-
- The fields pos_min and pos_delta are used to store the minimum offset
- and the delta to the maximum offset at the current point in the pattern.
-
-*/
-
-typedef struct scan_data_t {
- /*I32 len_min; unused */
- /*I32 len_delta; unused */
- I32 pos_min;
- I32 pos_delta;
- SV *last_found;
- I32 last_end; /* min value, <0 unless valid. */
- I32 last_start_min;
- I32 last_start_max;
- SV **longest; /* Either &l_fixed, or &l_float. */
- SV *longest_fixed; /* longest fixed string found in pattern */
- I32 offset_fixed; /* offset where it starts */
- I32 *minlen_fixed; /* pointer to the minlen relevent to the string */
- I32 lookbehind_fixed; /* is the position of the string modfied by LB */
- SV *longest_float; /* longest floating string found in pattern */
- I32 offset_float_min; /* earliest point in string it can appear */
- I32 offset_float_max; /* latest point in string it can appear */
- I32 *minlen_float; /* pointer to the minlen relevent to the string */
- I32 lookbehind_float; /* is the position of the string modified by LB */
- I32 flags;
- I32 whilem_c;
- I32 *last_closep;
- struct regnode_charclass_class *start_class;
-} scan_data_t;
-
-/*
- * Forward declarations for pregcomp()'s friends.
- */
-
-static const scan_data_t zero_scan_data =
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0};
-
-#define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL)
-#define SF_BEFORE_SEOL 0x0001
-#define SF_BEFORE_MEOL 0x0002
-#define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL)
-#define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL)
-
-#ifdef NO_UNARY_PLUS
-# define SF_FIX_SHIFT_EOL (0+2)
-# define SF_FL_SHIFT_EOL (0+4)
-#else
-# define SF_FIX_SHIFT_EOL (+2)
-# define SF_FL_SHIFT_EOL (+4)
-#endif
-
-#define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL)
-#define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL)
-
-#define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL)
-#define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */
-#define SF_IS_INF 0x0040
-#define SF_HAS_PAR 0x0080
-#define SF_IN_PAR 0x0100
-#define SF_HAS_EVAL 0x0200
-#define SCF_DO_SUBSTR 0x0400
-#define SCF_DO_STCLASS_AND 0x0800
-#define SCF_DO_STCLASS_OR 0x1000
-#define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR)
-#define SCF_WHILEM_VISITED_POS 0x2000
-
-#define SCF_TRIE_RESTUDY 0x4000 /* Do restudy? */
-#define SCF_SEEN_ACCEPT 0x8000
-
-#define UTF (RExC_utf8 != 0)
-#define LOC ((RExC_flags & RXf_PMf_LOCALE) != 0)
-#define FOLD ((RExC_flags & RXf_PMf_FOLD) != 0)
-
-#define OOB_UNICODE 12345678
-#define OOB_NAMEDCLASS -1
-
-#define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b)
-
-
-/* length of regex to show in messages that don't mark a position within */
-#define RegexLengthToShowInErrorMessages 127
-
-/*
- * If MARKER[12] are adjusted, be sure to adjust the constants at the top
- * of t/op/regmesg.t, the tests in t/op/re_tests, and those in
- * op/pragma/warn/regcomp.
- */
-#define MARKER1 "<-- HERE" /* marker as it appears in the description */
-#define MARKER2 " <-- HERE " /* marker as it appears within the regex */
-
-#define REPORT_LOCATION " in regex; marked by " MARKER1 " in m/%.*s" MARKER2 "%s/"
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given
- * arg. Show regex, up to a maximum length. If it's too long, chop and add
- * "...".
- */
-#define _FAIL(code) STMT_START { \
- const char *ellipses = ""; \
- IV len = RExC_end - RExC_precomp; \
- \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- if (len > RegexLengthToShowInErrorMessages) { \
- /* chop 10 shorter than the max, to ensure meaning of "..." */ \
- len = RegexLengthToShowInErrorMessages - 10; \
- ellipses = "..."; \
- } \
- code; \
-} STMT_END
-
-#define FAIL(msg) _FAIL( \
- Perl_croak(aTHX_ "%s in regex m/%.*s%s/", \
- msg, (int)len, RExC_precomp, ellipses))
-
-#define FAIL2(msg,arg) _FAIL( \
- Perl_croak(aTHX_ msg " in regex m/%.*s%s/", \
- arg, (int)len, RExC_precomp, ellipses))
-
-/*
- * Simple_vFAIL -- like FAIL, but marks the current location in the scan
- */
-#define Simple_vFAIL(m) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- Perl_croak(aTHX_ "%s" REPORT_LOCATION, \
- m, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL()
- */
-#define vFAIL(m) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL(m); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts two arguments.
- */
-#define Simple_vFAIL2(m,a1) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2().
- */
-#define vFAIL2(m,a1) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL2(m, a1); \
-} STMT_END
-
-
-/*
- * Like Simple_vFAIL(), but accepts three arguments.
- */
-#define Simple_vFAIL3(m, a1, a2) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3().
- */
-#define vFAIL3(m,a1,a2) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL3(m, a1, a2); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts four arguments.
- */
-#define Simple_vFAIL4(m, a1, a2, a3) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNreg(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNregdep(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_REGEXP), \
- m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN2reg(loc, m, a1) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN3(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN3reg(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN4(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN4reg(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN5(loc, m, a1, a2, a3, a4) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, a4, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-
-/* Allow for side effects in s */
-#define REGC(c,s) STMT_START { \
- if (!SIZE_ONLY) *(s) = (c); else (void)(s); \
-} STMT_END
-
-/* Macros for recording node offsets. 20001227 mjd@plover.com
- * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in
- * element 2*n-1 of the array. Element #2n holds the byte length node #n.
- * Element 0 holds the number n.
- * Position is 1 indexed.
- */
-#ifndef RE_TRACK_PATTERN_OFFSETS
-#define Set_Node_Offset_To_R(node,byte)
-#define Set_Node_Offset(node,byte)
-#define Set_Cur_Node_Offset
-#define Set_Node_Length_To_R(node,len)
-#define Set_Node_Length(node,len)
-#define Set_Node_Cur_Length(node)
-#define Node_Offset(n)
-#define Node_Length(n)
-#define Set_Node_Offset_Length(node,offset,len)
-#define ProgLen(ri) ri->u.proglen
-#define SetProgLen(ri,x) ri->u.proglen = x
-#else
-#define ProgLen(ri) ri->u.offsets[0]
-#define SetProgLen(ri,x) ri->u.offsets[0] = x
-#define Set_Node_Offset_To_R(node,byte) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) offset of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(byte))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Offset macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)-1] = (byte); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Offset(node,byte) \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start)
-#define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse)
-
-#define Set_Node_Length_To_R(node,len) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) size of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(len))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Length macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)] = (len); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Length(node,len) \
- Set_Node_Length_To_R((node)-RExC_emit_start, len)
-#define Set_Cur_Node_Length(len) Set_Node_Length(RExC_emit, len)
-#define Set_Node_Cur_Length(node) \
- Set_Node_Length(node, RExC_parse - parse_start)
-
-/* Get offsets and lengths */
-#define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1])
-#define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)])
-
-#define Set_Node_Offset_Length(node,offset,len) STMT_START { \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (offset)); \
- Set_Node_Length_To_R((node)-RExC_emit_start, (len)); \
-} STMT_END
-#endif
-
-#if PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS
-#define EXPERIMENTAL_INPLACESCAN
-#endif /*RE_TRACK_PATTERN_OFFSETS*/
-
-#define DEBUG_STUDYDATA(str,data,depth) \
-DEBUG_OPTIMISE_MORE_r(if(data){ \
- PerlIO_printf(Perl_debug_log, \
- "%*s" str "Pos:%"IVdf"/%"IVdf \
- " Flags: 0x%"UVXf" Whilem_c: %"IVdf" Lcp: %"IVdf" %s", \
- (int)(depth)*2, "", \
- (IV)((data)->pos_min), \
- (IV)((data)->pos_delta), \
- (UV)((data)->flags), \
- (IV)((data)->whilem_c), \
- (IV)((data)->last_closep ? *((data)->last_closep) : -1), \
- is_inf ? "INF " : "" \
- ); \
- if ((data)->last_found) \
- PerlIO_printf(Perl_debug_log, \
- "Last:'%s' %"IVdf":%"IVdf"/%"IVdf" %sFixed:'%s' @ %"IVdf \
- " %sFloat: '%s' @ %"IVdf"/%"IVdf"", \
- SvPVX_const((data)->last_found), \
- (IV)((data)->last_end), \
- (IV)((data)->last_start_min), \
- (IV)((data)->last_start_max), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_fixed)) ? "*" : "", \
- SvPVX_const((data)->longest_fixed), \
- (IV)((data)->offset_fixed), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_float)) ? "*" : "", \
- SvPVX_const((data)->longest_float), \
- (IV)((data)->offset_float_min), \
- (IV)((data)->offset_float_max) \
- ); \
- PerlIO_printf(Perl_debug_log,"\n"); \
-});
-
-static void clear_re(pTHX_ void *r);
-
-/* Mark that we cannot extend a found fixed substring at this point.
- Update the longest found anchored substring and the longest found
- floating substrings if needed. */
-
-STATIC void
-S_scan_commit(pTHX_ const RExC_state_t *pRExC_state, scan_data_t *data, I32 *minlenp, int is_inf)
-{
- const STRLEN l = CHR_SVLEN(data->last_found);
- const STRLEN old_l = CHR_SVLEN(*data->longest);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_SCAN_COMMIT;
-
- if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) {
- SvSetMagicSV(*data->longest, data->last_found);
- if (*data->longest == data->longest_fixed) {
- data->offset_fixed = l ? data->last_start_min : data->pos_min;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL);
- else
- data->flags &= ~SF_FIX_BEFORE_EOL;
- data->minlen_fixed=minlenp;
- data->lookbehind_fixed=0;
- }
- else { /* *data->longest == data->longest_float */
- data->offset_float_min = l ? data->last_start_min : data->pos_min;
- data->offset_float_max = (l
- ? data->last_start_max
- : data->pos_min + data->pos_delta);
- if (is_inf || (U32)data->offset_float_max > (U32)I32_MAX)
- data->offset_float_max = I32_MAX;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL);
- else
- data->flags &= ~SF_FL_BEFORE_EOL;
- data->minlen_float=minlenp;
- data->lookbehind_float=0;
- }
- }
- SvCUR_set(data->last_found, 0);
- {
- SV * const sv = data->last_found;
- if (SvUTF8(sv) && SvMAGICAL(sv)) {
- MAGIC * const mg = mg_find(sv, PERL_MAGIC_utf8);
- if (mg)
- mg->mg_len = 0;
- }
- }
- data->last_end = -1;
- data->flags &= ~SF_BEFORE_EOL;
- DEBUG_STUDYDATA("commit: ",data,0);
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_anything(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_ANYTHING;
-
- ANYOF_CLASS_ZERO(cl);
- ANYOF_BITMAP_SETALL(cl);
- cl->flags = ANYOF_EOS|ANYOF_UNICODE_ALL;
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* Can match anything (initialization) */
-STATIC int
-S_cl_is_anything(const struct regnode_charclass_class *cl)
-{
- int value;
-
- PERL_ARGS_ASSERT_CL_IS_ANYTHING;
-
- for (value = 0; value <= ANYOF_MAX; value += 2)
- if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1))
- return 1;
- if (!(cl->flags & ANYOF_UNICODE_ALL))
- return 0;
- if (!ANYOF_BITMAP_TESTALLSET((const void*)cl))
- return 0;
- return 1;
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_init(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
-}
-
-STATIC void
-S_cl_init_zero(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT_ZERO;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* 'And' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_and(struct regnode_charclass_class *cl,
- const struct regnode_charclass_class *and_with)
-{
- PERL_ARGS_ASSERT_CL_AND;
-
- assert(and_with->type == ANYOF);
- if (!(and_with->flags & ANYOF_CLASS)
- && !(cl->flags & ANYOF_CLASS)
- && (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(and_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD)) {
- int i;
-
- if (and_with->flags & ANYOF_INVERT)
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= ~and_with->bitmap[i];
- else
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= and_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise, leave it along for a moment. */
- if (!(and_with->flags & ANYOF_EOS))
- cl->flags &= ~ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE_ALL && and_with->flags & ANYOF_UNICODE &&
- !(and_with->flags & ANYOF_INVERT)) {
- cl->flags &= ~ANYOF_UNICODE_ALL;
- cl->flags |= ANYOF_UNICODE;
- ARG_SET(cl, ARG(and_with));
- }
- if (!(and_with->flags & ANYOF_UNICODE_ALL) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE_ALL;
- if (!(and_with->flags & (ANYOF_UNICODE|ANYOF_UNICODE_ALL)) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE;
-}
-
-/* 'OR' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_or(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl, const struct regnode_charclass_class *or_with)
-{
- PERL_ARGS_ASSERT_CL_OR;
-
- if (or_with->flags & ANYOF_INVERT) {
- /* We do not use
- * (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2))
- * <= (B1 | !B2) | (CL1 | !CL2)
- * which is wasteful if CL2 is small, but we ignore CL2:
- * (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1
- * XXXX Can we handle case-fold? Unclear:
- * (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) =
- * (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i'))
- */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(or_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD) ) {
- int i;
-
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= ~or_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise */
- else {
- cl_anything(pRExC_state, cl);
- }
- } else {
- /* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && (!(or_with->flags & ANYOF_FOLD)
- || (cl->flags & ANYOF_FOLD)) ) {
- int i;
-
- /* OR char bitmap and class bitmap separately */
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= or_with->bitmap[i];
- if (or_with->flags & ANYOF_CLASS) {
- for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++)
- cl->classflags[i] |= or_with->classflags[i];
- cl->flags |= ANYOF_CLASS;
- }
- }
- else { /* XXXX: logic is complicated, leave it along for a moment. */
- cl_anything(pRExC_state, cl);
- }
- }
- if (or_with->flags & ANYOF_EOS)
- cl->flags |= ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE && or_with->flags & ANYOF_UNICODE &&
- ARG(cl) != ARG(or_with)) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
- if (or_with->flags & ANYOF_UNICODE_ALL) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
-}
-
-#define TRIE_LIST_ITEM(state,idx) (trie->states[state].trans.list)[ idx ]
-#define TRIE_LIST_CUR(state) ( TRIE_LIST_ITEM( state, 0 ).forid )
-#define TRIE_LIST_LEN(state) ( TRIE_LIST_ITEM( state, 0 ).newstate )
-#define TRIE_LIST_USED(idx) ( trie->states[state].trans.list ? (TRIE_LIST_CUR( idx ) - 1) : 0 )
-
-
-#ifdef DEBUGGING
-/*
- dump_trie(trie,widecharmap,revcharmap)
- dump_trie_interim_list(trie,widecharmap,revcharmap,next_alloc)
- dump_trie_interim_table(trie,widecharmap,revcharmap,next_alloc)
-
- These routines dump out a trie in a somewhat readable format.
- The _interim_ variants are used for debugging the interim
- tables that are used to generate the final compressed
- representation which is what dump_trie expects.
-
- Part of the reason for their existance is to provide a form
- of documentation as to how the different representations function.
-
-*/
-
-/*
- Dumps the final compressed table form of the trie to Perl_debug_log.
- Used for debugging make_trie().
-*/
-
-STATIC void
-S_dump_trie(pTHX_ const struct _reg_trie_data *trie, HV *widecharmap,
- AV *revcharmap, U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE;
-
- PerlIO_printf( Perl_debug_log, "%*sChar : %-6s%-6s%-4s ",
- (int)depth * 2 + 2,"",
- "Match","Base","Ofs" );
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ ) {
- SV ** const tmp = av_fetch( revcharmap, state, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
- PerlIO_printf( Perl_debug_log, "\n%*sState|-----------------------",
- (int)depth * 2 + 2,"");
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ )
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth, "--------");
- PerlIO_printf( Perl_debug_log, "\n");
-
- for( state = 1 ; state < trie->statecount ; state++ ) {
- const U32 base = trie->states[ state ].trans.base;
-
- PerlIO_printf( Perl_debug_log, "%*s#%4"UVXf"|", (int)depth * 2 + 2,"", (UV)state);
-
- if ( trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " W%4X", trie->states[ state ].wordnum );
- } else {
- PerlIO_printf( Perl_debug_log, "%6s", "" );
- }
-
- PerlIO_printf( Perl_debug_log, " @%4"UVXf" ", (UV)base );
-
- if ( base ) {
- U32 ofs = 0;
-
- while( ( base + ofs < trie->uniquecharcount ) ||
- ( base + ofs - trie->uniquecharcount < trie->lasttrans
- && trie->trans[ base + ofs - trie->uniquecharcount ].check != state))
- ofs++;
-
- PerlIO_printf( Perl_debug_log, "+%2"UVXf"[ ", (UV)ofs);
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- PerlIO_printf( Perl_debug_log, "%*"UVXf,
- colwidth,
- (UV)trie->trans[ base + ofs - trie->uniquecharcount ].next );
- } else {
- PerlIO_printf( Perl_debug_log, "%*s",colwidth," ." );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "]");
-
- }
- PerlIO_printf( Perl_debug_log, "\n" );
- }
-}
-/*
- Dumps a fully constructed but uncompressed trie in list form.
- List tries normally only are used for construction when the number of
- possible chars (trie->uniquecharcount) is very high.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_list(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_LIST;
-
- /* print out the table precompression. */
- PerlIO_printf( Perl_debug_log, "%*sState :Word | Transition Data\n%*s%s",
- (int)depth * 2 + 2,"", (int)depth * 2 + 2,"",
- "------:-----+-----------------\n" );
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U16 charid;
-
- PerlIO_printf( Perl_debug_log, "%*s %4"UVXf" :",
- (int)depth * 2 + 2,"", (UV)state );
- if ( ! trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, "%5s| ","");
- } else {
- PerlIO_printf( Perl_debug_log, "W%4x| ",
- trie->states[ state ].wordnum
- );
- }
- for( charid = 1 ; charid <= TRIE_LIST_USED( state ) ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, TRIE_LIST_ITEM(state,charid).forid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s:%3X=%4"UVXf" | ",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- ) ,
- TRIE_LIST_ITEM(state,charid).forid,
- (UV)TRIE_LIST_ITEM(state,charid).newstate
- );
- if (!(charid % 10))
- PerlIO_printf(Perl_debug_log, "\n%*s| ",
- (int)((depth * 2) + 14), "");
- }
- }
- PerlIO_printf( Perl_debug_log, "\n");
- }
-}
-
-/*
- Dumps a fully constructed but uncompressed trie in table form.
- This is the normal DFA style state transition table, with a few
- twists to facilitate compression later.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_table(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- U16 charid;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_TABLE;
-
- /*
- print out the table precompression so that we can do a visual check
- that they are identical.
- */
-
- PerlIO_printf( Perl_debug_log, "%*sChar : ",(int)depth * 2 + 2,"" );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, charid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "\n%*sState+-",(int)depth * 2 + 2,"" );
-
- for( charid=0 ; charid < trie->uniquecharcount ; charid++ ) {
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth,"--------");
- }
-
- PerlIO_printf( Perl_debug_log, "\n" );
-
- for( state=1 ; state < next_alloc ; state += trie->uniquecharcount ) {
-
- PerlIO_printf( Perl_debug_log, "%*s%4"UVXf" : ",
- (int)depth * 2 + 2,"",
- (UV)TRIE_NODENUM( state ) );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- UV v=(UV)SAFE_TRIE_NODENUM( trie->trans[ state + charid ].next );
- if (v)
- PerlIO_printf( Perl_debug_log, "%*"UVXf, colwidth, v );
- else
- PerlIO_printf( Perl_debug_log, "%*s", colwidth, "." );
- }
- if ( ! trie->states[ TRIE_NODENUM( state ) ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf")\n", (UV)trie->trans[ state ].check );
- } else {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf") W%4X\n", (UV)trie->trans[ state ].check,
- trie->states[ TRIE_NODENUM( state ) ].wordnum );
- }
- }
-}
-
-#endif
-
-/* make_trie(startbranch,first,last,tail,word_count,flags,depth)
- startbranch: the first branch in the whole branch sequence
- first : start branch of sequence of branch-exact nodes.
- May be the same as startbranch
- last : Thing following the last branch.
- May be the same as tail.
- tail : item following the branch sequence
- count : words in the sequence
- flags : currently the OP() type we will be building one of /EXACT(|F|Fl)/
- depth : indent depth
-
-Inplace optimizes a sequence of 2 or more Branch-Exact nodes into a TRIE node.
-
-A trie is an N'ary tree where the branches are determined by digital
-decomposition of the key. IE, at the root node you look up the 1st character and
-follow that branch repeat until you find the end of the branches. Nodes can be
-marked as "accepting" meaning they represent a complete word. Eg:
-
- /he|she|his|hers/
-
-would convert into the following structure. Numbers represent states, letters
-following numbers represent valid transitions on the letter from that state, if
-the number is in square brackets it represents an accepting state, otherwise it
-will be in parenthesis.
-
- +-h->+-e->[3]-+-r->(8)-+-s->[9]
- | |
- | (2)
- | |
- (1) +-i->(6)-+-s->[7]
- |
- +-s->(3)-+-h->(4)-+-e->[5]
-
- Accept Word Mapping: 3=>1 (he),5=>2 (she), 7=>3 (his), 9=>4 (hers)
-
-This shows that when matching against the string 'hers' we will begin at state 1
-read 'h' and move to state 2, read 'e' and move to state 3 which is accepting,
-then read 'r' and go to state 8 followed by 's' which takes us to state 9 which
-is also accepting. Thus we know that we can match both 'he' and 'hers' with a
-single traverse. We store a mapping from accepting to state to which word was
-matched, and then when we have multiple possibilities we try to complete the
-rest of the regex in the order in which they occured in the alternation.
-
-The only prior NFA like behaviour that would be changed by the TRIE support is
-the silent ignoring of duplicate alternations which are of the form:
-
- / (DUPE|DUPE) X? (?{ ... }) Y /x
-
-Thus EVAL blocks follwing a trie may be called a different number of times with
-and without the optimisation. With the optimisations dupes will be silently
-ignored. This inconsistant behaviour of EVAL type nodes is well established as
-the following demonstrates:
-
- 'words'=~/(word|word|word)(?{ print $1 })[xyz]/
-
-which prints out 'word' three times, but
-
- 'words'=~/(word|word|word)(?{ print $1 })S/
-
-which doesnt print it out at all. This is due to other optimisations kicking in.
-
-Example of what happens on a structural level:
-
-The regexp /(ac|ad|ab)+/ will produce the folowing debug output:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: BRANCH(8)
- 6: EXACT <ac>(16)
- 8: BRANCH(11)
- 9: EXACT <ad>(16)
- 11: BRANCH(14)
- 12: EXACT <ab>(16)
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-This would be optimizable with startbranch=5, first=5, last=16, tail=16
-and should turn into:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: TRIE(16)
- [Words:3 Chars Stored:6 Unique Chars:4 States:5 NCP:1]
- <ac>
- <ad>
- <ab>
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-Cases where tail != last would be like /(?foo|bar)baz/:
-
- 1: BRANCH(4)
- 2: EXACT <foo>(8)
- 4: BRANCH(7)
- 5: EXACT <bar>(8)
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
-which would be optimizable with startbranch=1, first=1, last=7, tail=8
-and would end up looking like:
-
- 1: TRIE(8)
- [Words:2 Chars Stored:6 Unique Chars:5 States:7 NCP:1]
- <foo>
- <bar>
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
- d = uvuni_to_utf8_flags(d, uv, 0);
-
-is the recommended Unicode-aware way of saying
-
- *(d++) = uv;
-*/
-
-#define TRIE_STORE_REVCHAR \
- STMT_START { \
- if (UTF) { \
- SV *zlopp = newSV(2); \
- unsigned char *flrbbbbb = (unsigned char *) SvPVX(zlopp); \
- unsigned const char *const kapow = uvuni_to_utf8(flrbbbbb, uvc & 0xFF); \
- SvCUR_set(zlopp, kapow - flrbbbbb); \
- SvPOK_on(zlopp); \
- SvUTF8_on(zlopp); \
- av_push(revcharmap, zlopp); \
- } else { \
- char ooooff = (char)uvc; \
- av_push(revcharmap, newSVpvn(&ooooff, 1)); \
- } \
- } STMT_END
-
-#define TRIE_READ_CHAR STMT_START { \
- wordlen++; \
- if ( UTF ) { \
- if ( folder ) { \
- if ( foldlen > 0 ) { \
- uvc = utf8n_to_uvuni( scan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- scan += len; \
- len = 0; \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- scan = foldbuf + UNISKIP( uvc ); \
- } \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- } \
- } else { \
- uvc = (U32)*uc; \
- len = 1; \
- } \
-} STMT_END
-
-
-
-#define TRIE_LIST_PUSH(state,fid,ns) STMT_START { \
- if ( TRIE_LIST_CUR( state ) >=TRIE_LIST_LEN( state ) ) { \
- U32 ging = TRIE_LIST_LEN( state ) *= 2; \
- Renew( trie->states[ state ].trans.list, ging, reg_trie_trans_le ); \
- } \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).forid = fid; \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).newstate = ns; \
- TRIE_LIST_CUR( state )++; \
-} STMT_END
-
-#define TRIE_LIST_NEW(state) STMT_START { \
- Newxz( trie->states[ state ].trans.list, \
- 4, reg_trie_trans_le ); \
- TRIE_LIST_CUR( state ) = 1; \
- TRIE_LIST_LEN( state ) = 4; \
-} STMT_END
-
-#define TRIE_HANDLE_WORD(state) STMT_START { \
- U16 dupe= trie->states[ state ].wordnum; \
- regnode * const noper_next = regnext( noper ); \
- \
- if (trie->wordlen) \
- trie->wordlen[ curword ] = wordlen; \
- DEBUG_r({ \
- /* store the word for dumping */ \
- SV* tmp; \
- if (OP(noper) != NOTHING) \
- tmp = newSVpvn_utf8(STRING(noper), STR_LEN(noper), UTF); \
- else \
- tmp = newSVpvn_utf8( "", 0, UTF ); \
- av_push( trie_words, tmp ); \
- }); \
- \
- curword++; \
- \
- if ( noper_next < tail ) { \
- if (!trie->jump) \
- trie->jump = (U16 *) PerlMemShared_calloc( word_count + 1, sizeof(U16) ); \
- trie->jump[curword] = (U16)(noper_next - convert); \
- if (!jumper) \
- jumper = noper_next; \
- if (!nextbranch) \
- nextbranch= regnext(cur); \
- } \
- \
- if ( dupe ) { \
- /* So it's a dupe. This means we need to maintain a */\
- /* linked-list from the first to the next. */\
- /* we only allocate the nextword buffer when there */\
- /* a dupe, so first time we have to do the allocation */\
- if (!trie->nextword) \
- trie->nextword = (U16 *) \
- PerlMemShared_calloc( word_count + 1, sizeof(U16)); \
- while ( trie->nextword[dupe] ) \
- dupe= trie->nextword[dupe]; \
- trie->nextword[dupe]= curword; \
- } else { \
- /* we haven't inserted this word yet. */ \
- trie->states[ state ].wordnum = curword; \
- } \
-} STMT_END
-
-
-#define TRIE_TRANS_STATE(state,base,ucharcount,charid,special) \
- ( ( base + charid >= ucharcount \
- && base + charid < ubound \
- && state == trie->trans[ base - ucharcount + charid ].check \
- && trie->trans[ base - ucharcount + charid ].next ) \
- ? trie->trans[ base - ucharcount + charid ].next \
- : ( state==1 ? special : 0 ) \
- )
-
-#define MADE_TRIE 1
-#define MADE_JUMP_TRIE 2
-#define MADE_EXACT_TRIE 4
-
-STATIC I32
-S_make_trie(pTHX_ RExC_state_t *pRExC_state, regnode *startbranch, regnode *first, regnode *last, regnode *tail, U32 word_count, U32 flags, U32 depth)
-{
- dVAR;
- /* first pass, loop through and scan words */
- reg_trie_data *trie;
- HV *widecharmap = NULL;
- AV *revcharmap = newAV();
- regnode *cur;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- STRLEN len = 0;
- UV uvc = 0;
- U16 curword = 0;
- U32 next_alloc = 0;
- regnode *jumper = NULL;
- regnode *nextbranch = NULL;
- regnode *convert = NULL;
- /* we just use folder as a flag in utf8 */
- const U8 * const folder = ( flags == EXACTF
- ? PL_fold
- : ( flags == EXACTFL
- ? PL_fold_locale
- : NULL
- )
- );
-
-#ifdef DEBUGGING
- const U32 data_slot = add_data( pRExC_state, 4, "tuuu" );
- AV *trie_words = NULL;
- /* along with revcharmap, this only used during construction but both are
- * useful during debugging so we store them in the struct when debugging.
- */
-#else
- const U32 data_slot = add_data( pRExC_state, 2, "tu" );
- STRLEN trie_charcount=0;
-#endif
- SV *re_trie_maxbuff;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- trie = (reg_trie_data *) PerlMemShared_calloc( 1, sizeof(reg_trie_data) );
- trie->refcount = 1;
- trie->startstate = 1;
- trie->wordcount = word_count;
- RExC_rxi->data->data[ data_slot ] = (void*)trie;
- trie->charmap = (U16 *) PerlMemShared_calloc( 256, sizeof(U16) );
- if (!(UTF && folder))
- trie->bitmap = (char *) PerlMemShared_calloc( ANYOF_BITMAP_SIZE, 1 );
- DEBUG_r({
- trie_words = newAV();
- });
-
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff)) {
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- DEBUG_OPTIMISE_r({
- PerlIO_printf( Perl_debug_log,
- "%*smake_trie start==%d, first==%d, last==%d, tail==%d depth=%d\n",
- (int)depth * 2 + 2, "",
- REG_NODE_NUM(startbranch),REG_NODE_NUM(first),
- REG_NODE_NUM(last), REG_NODE_NUM(tail),
- (int)depth);
- });
-
- /* Find the node we are going to overwrite */
- if ( first == startbranch && OP( last ) != BRANCH ) {
- /* whole branch chain */
- convert = first;
- } else {
- /* branch sub-chain */
- convert = NEXTOPER( first );
- }
-
- /* -- First loop and Setup --
-
- We first traverse the branches and scan each word to determine if it
- contains widechars, and how many unique chars there are, this is
- important as we have to build a table with at least as many columns as we
- have unique chars.
-
- We use an array of integers to represent the character codes 0..255
- (trie->charmap) and we use a an HV* to store Unicode characters. We use the
- native representation of the character value as the key and IV's for the
- coded index.
-
- *TODO* If we keep track of how many times each character is used we can
- remap the columns so that the table compression later on is more
- efficient in terms of memory by ensuring most common value is in the
- middle and the least common are on the outside. IMO this would be better
- than a most to least common mapping as theres a decent chance the most
- common letter will share a node with the least common, meaning the node
- will not be compressable. With a middle is most common approach the worst
- case is when we have the least common nodes twice.
-
- */
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- STRLEN foldlen = 0;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- const U8 *scan = (U8*)NULL;
- U32 wordlen = 0; /* required init */
- STRLEN chars = 0;
- bool set_bit = trie->bitmap ? 1 : 0; /*store the first char in the bitmap?*/
-
- if (OP(noper) == NOTHING) {
- trie->minlen= 0;
- continue;
- }
- if ( set_bit ) /* bitmap only alloced when !(UTF&&Folding) */
- TRIE_BITMAP_SET(trie,*uc); /* store the raw first byte
- regardless of encoding */
-
- for ( ; uc < e ; uc += len ) {
- TRIE_CHARCOUNT(trie)++;
- TRIE_READ_CHAR;
- chars++;
- if ( uvc < 256 ) {
- if ( !trie->charmap[ uvc ] ) {
- trie->charmap[ uvc ]=( ++trie->uniquecharcount );
- if ( folder )
- trie->charmap[ folder[ uvc ] ] = trie->charmap[ uvc ];
- TRIE_STORE_REVCHAR;
- }
- if ( set_bit ) {
- /* store the codepoint in the bitmap, and if its ascii
- also store its folded equivelent. */
- TRIE_BITMAP_SET(trie,uvc);
-
- /* store the folded codepoint */
- if ( folder ) TRIE_BITMAP_SET(trie,folder[ uvc ]);
-
- if ( !UTF ) {
- /* store first byte of utf8 representation of
- codepoints in the 127 < uvc < 256 range */
- if (127 < uvc && uvc < 192) {
- TRIE_BITMAP_SET(trie,194);
- } else if (191 < uvc ) {
- TRIE_BITMAP_SET(trie,195);
- /* && uvc < 256 -- we know uvc is < 256 already */
- }
- }
- set_bit = 0; /* We've done our bit :-) */
- }
- } else {
- SV** svpp;
- if ( !widecharmap )
- widecharmap = newHV();
-
- svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 1 );
-
- if ( !svpp )
- Perl_croak( aTHX_ "error creating/fetching widecharmap entry for 0x%"UVXf, uvc );
-
- if ( !SvTRUE( *svpp ) ) {
- sv_setiv( *svpp, ++trie->uniquecharcount );
- TRIE_STORE_REVCHAR;
- }
- }
- }
- if( cur == first ) {
- trie->minlen=chars;
- trie->maxlen=chars;
- } else if (chars < trie->minlen) {
- trie->minlen=chars;
- } else if (chars > trie->maxlen) {
- trie->maxlen=chars;
- }
-
- } /* end first pass */
- DEBUG_TRIE_COMPILE_r(
- PerlIO_printf( Perl_debug_log, "%*sTRIE(%s): W:%d C:%d Uq:%d Min:%d Max:%d\n",
- (int)depth * 2 + 2,"",
- ( widecharmap ? "UTF8" : "NATIVE" ), (int)word_count,
- (int)TRIE_CHARCOUNT(trie), trie->uniquecharcount,
- (int)trie->minlen, (int)trie->maxlen )
- );
- trie->wordlen = (U32 *) PerlMemShared_calloc( word_count, sizeof(U32) );
-
- /*
- We now know what we are dealing with in terms of unique chars and
- string sizes so we can calculate how much memory a naive
- representation using a flat table will take. If it's over a reasonable
- limit (as specified by ${^RE_TRIE_MAXBUF}) we use a more memory
- conservative but potentially much slower representation using an array
- of lists.
-
- At the end we convert both representations into the same compressed
- form that will be used in regexec.c for matching with. The latter
- is a form that cannot be used to construct with but has memory
- properties similar to the list form and access properties similar
- to the table form making it both suitable for fast searches and
- small enough that its feasable to store for the duration of a program.
-
- See the comment in the code where the compressed table is produced
- inplace from the flat tabe representation for an explanation of how
- the compression works.
-
- */
-
-
- if ( (IV)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1) > SvIV(re_trie_maxbuff) ) {
- /*
- Second Pass -- Array Of Lists Representation
-
- Each state will be represented by a list of charid:state records
- (reg_trie_trans_le) the first such element holds the CUR and LEN
- points of the allocated array. (See defines above).
-
- We build the initial structure using the lists, and then convert
- it into the compressed table form which allows faster lookups
- (but cant be modified once converted).
- */
-
- STRLEN transcount = 1;
-
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using list compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- TRIE_LIST_NEW(1);
- next_alloc = 2;
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- U32 state = 1; /* required init */
- U16 charid = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if (OP(noper) != NOTHING) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV** const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- if ( !svpp ) {
- charid = 0;
- } else {
- charid=(U16)SvIV( *svpp );
- }
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- if ( charid ) {
-
- U16 check;
- U32 newstate = 0;
-
- charid--;
- if ( !trie->states[ state ].trans.list ) {
- TRIE_LIST_NEW( state );
- }
- for ( check = 1; check <= TRIE_LIST_USED( state ); check++ ) {
- if ( TRIE_LIST_ITEM( state, check ).forid == charid ) {
- newstate = TRIE_LIST_ITEM( state, check ).newstate;
- break;
- }
- }
- if ( ! newstate ) {
- newstate = next_alloc++;
- TRIE_LIST_PUSH( state, charid, newstate );
- transcount++;
- }
- state = newstate;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- }
- }
- TRIE_HANDLE_WORD(state);
-
- } /* end second pass */
-
- /* next alloc is the NEXT state to be allocated */
- trie->statecount = next_alloc;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states,
- next_alloc
- * sizeof(reg_trie_state) );
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_list(trie, widecharmap,
- revcharmap, next_alloc,
- depth+1)
- );
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( transcount, sizeof(reg_trie_trans) );
- {
- U32 state;
- U32 tp = 0;
- U32 zp = 0;
-
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U32 base=0;
-
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, "tp: %d zp: %d ",tp,zp)
- );
- */
-
- if (trie->states[state].trans.list) {
- U16 minid=TRIE_LIST_ITEM( state, 1).forid;
- U16 maxid=minid;
- U16 idx;
-
- for( idx = 2 ; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U16 forid = TRIE_LIST_ITEM( state, idx).forid;
- if ( forid < minid ) {
- minid=forid;
- } else if ( forid > maxid ) {
- maxid=forid;
- }
- }
- if ( transcount < tp + maxid - minid + 1) {
- transcount *= 2;
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans,
- transcount
- * sizeof(reg_trie_trans) );
- Zero( trie->trans + (transcount / 2), transcount / 2 , reg_trie_trans );
- }
- base = trie->uniquecharcount + tp - minid;
- if ( maxid == minid ) {
- U32 set = 0;
- for ( ; zp < tp ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- base = trie->uniquecharcount + zp - minid;
- trie->trans[ zp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ zp ].check = state;
- set = 1;
- break;
- }
- }
- if ( !set ) {
- trie->trans[ tp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ tp ].check = state;
- tp++;
- zp = tp;
- }
- } else {
- for ( idx=1; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U32 tid = base - trie->uniquecharcount + TRIE_LIST_ITEM( state, idx ).forid;
- trie->trans[ tid ].next = TRIE_LIST_ITEM( state, idx ).newstate;
- trie->trans[ tid ].check = state;
- }
- tp += ( maxid - minid + 1 );
- }
- Safefree(trie->states[ state ].trans.list);
- }
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, " base: %d\n",base);
- );
- */
- trie->states[ state ].trans.base=base;
- }
- trie->lasttrans = tp + 1;
- }
- } else {
- /*
- Second Pass -- Flat Table Representation.
-
- we dont use the 0 slot of either trans[] or states[] so we add 1 to each.
- We know that we will need Charcount+1 trans at most to store the data
- (one row per char at worst case) So we preallocate both structures
- assuming worst case.
-
- We then construct the trie using only the .next slots of the entry
- structs.
-
- We use the .check field of the first entry of the node temporarily to
- make compression both faster and easier by keeping track of how many non
- zero fields are in the node.
-
- Since trans are numbered from 1 any 0 pointer in the table is a FAIL
- transition.
-
- There are two terms at use here: state as a TRIE_NODEIDX() which is a
- number representing the first entry of the node, and state as a
- TRIE_NODENUM() which is the trans number. state 1 is TRIE_NODEIDX(1) and
- TRIE_NODENUM(1), state 2 is TRIE_NODEIDX(2) and TRIE_NODENUM(3) if there
- are 2 entrys per node. eg:
-
- A B A B
- 1. 2 4 1. 3 7
- 2. 0 3 3. 0 5
- 3. 0 0 5. 0 0
- 4. 0 0 7. 0 0
-
- The table is internally in the right hand, idx form. However as we also
- have to deal with the states array which is indexed by nodenum we have to
- use TRIE_NODENUM() to convert.
-
- */
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using table compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( ( TRIE_CHARCOUNT(trie) + 1 )
- * trie->uniquecharcount + 1,
- sizeof(reg_trie_trans) );
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- next_alloc = trie->uniquecharcount + 1;
-
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
-
- U32 state = 1; /* required init */
-
- U16 charid = 0; /* sanity init */
- U32 accept_state = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
-
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if ( OP(noper) != NOTHING ) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV* const * const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- charid = svpp ? (U16)SvIV(*svpp) : 0;
- }
- if ( charid ) {
- charid--;
- if ( !trie->trans[ state + charid ].next ) {
- trie->trans[ state + charid ].next = next_alloc;
- trie->trans[ state ].check++;
- next_alloc += trie->uniquecharcount;
- }
- state = trie->trans[ state + charid ].next;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- }
- }
- accept_state = TRIE_NODENUM( state );
- TRIE_HANDLE_WORD(accept_state);
-
- } /* end second pass */
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_table(trie, widecharmap,
- revcharmap,
- next_alloc, depth+1));
-
- {
- /*
- * Inplace compress the table.*
-
- For sparse data sets the table constructed by the trie algorithm will
- be mostly 0/FAIL transitions or to put it another way mostly empty.
- (Note that leaf nodes will not contain any transitions.)
-
- This algorithm compresses the tables by eliminating most such
- transitions, at the cost of a modest bit of extra work during lookup:
-
- - Each states[] entry contains a .base field which indicates the
- index in the state[] array wheres its transition data is stored.
-
- - If .base is 0 there are no valid transitions from that node.
-
- - If .base is nonzero then charid is added to it to find an entry in
- the trans array.
-
- -If trans[states[state].base+charid].check!=state then the
- transition is taken to be a 0/Fail transition. Thus if there are fail
- transitions at the front of the node then the .base offset will point
- somewhere inside the previous nodes data (or maybe even into a node
- even earlier), but the .check field determines if the transition is
- valid.
-
- XXX - wrong maybe?
- The following process inplace converts the table to the compressed
- table: We first do not compress the root node 1,and mark its all its
- .check pointers as 1 and set its .base pointer as 1 as well. This
- allows to do a DFA construction from the compressed table later, and
- ensures that any .base pointers we calculate later are greater than
- 0.
-
- - We set 'pos' to indicate the first entry of the second node.
-
- - We then iterate over the columns of the node, finding the first and
- last used entry at l and m. We then copy l..m into pos..(pos+m-l),
- and set the .check pointers accordingly, and advance pos
- appropriately and repreat for the next node. Note that when we copy
- the next pointers we have to convert them from the original
- NODEIDX form to NODENUM form as the former is not valid post
- compression.
-
- - If a node has no transitions used we mark its base as 0 and do not
- advance the pos pointer.
-
- - If a node only has one transition we use a second pointer into the
- structure to fill in allocated fail transitions from other states.
- This pointer is independent of the main pointer and scans forward
- looking for null transitions that are allocated to a state. When it
- finds one it writes the single transition into the "hole". If the
- pointer doesnt find one the single transition is appended as normal.
-
- - Once compressed we can Renew/realloc the structures to release the
- excess space.
-
- See "Table-Compression Methods" in sec 3.9 of the Red Dragon,
- specifically Fig 3.47 and the associated pseudocode.
-
- demq
- */
- const U32 laststate = TRIE_NODENUM( next_alloc );
- U32 state, charid;
- U32 pos = 0, zp=0;
- trie->statecount = laststate;
-
- for ( state = 1 ; state < laststate ; state++ ) {
- U8 flag = 0;
- const U32 stateidx = TRIE_NODEIDX( state );
- const U32 o_used = trie->trans[ stateidx ].check;
- U32 used = trie->trans[ stateidx ].check;
- trie->trans[ stateidx ].check = 0;
-
- for ( charid = 0 ; used && charid < trie->uniquecharcount ; charid++ ) {
- if ( flag || trie->trans[ stateidx + charid ].next ) {
- if ( trie->trans[ stateidx + charid ].next ) {
- if (o_used == 1) {
- for ( ; zp < pos ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- break;
- }
- }
- trie->states[ state ].trans.base = zp + trie->uniquecharcount - charid ;
- trie->trans[ zp ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ zp ].check = state;
- if ( ++zp > pos ) pos = zp;
- break;
- }
- used--;
- }
- if ( !flag ) {
- flag = 1;
- trie->states[ state ].trans.base = pos + trie->uniquecharcount - charid ;
- }
- trie->trans[ pos ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ pos ].check = state;
- pos++;
- }
- }
- }
- trie->lasttrans = pos + 1;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states, laststate
- * sizeof(reg_trie_state) );
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log,
- "%*sAlloc: %d Orig: %"IVdf" elements, Final:%"IVdf". Savings of %%%5.2f\n",
- (int)depth * 2 + 2,"",
- (int)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1 ),
- (IV)next_alloc,
- (IV)pos,
- ( ( next_alloc - pos ) * 100 ) / (double)next_alloc );
- );
-
- } /* end table compress */
- }
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf(Perl_debug_log, "%*sStatecount:%"UVxf" Lasttrans:%"UVxf"\n",
- (int)depth * 2 + 2, "",
- (UV)trie->statecount,
- (UV)trie->lasttrans)
- );
- /* resize the trans array to remove unused space */
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans, trie->lasttrans
- * sizeof(reg_trie_trans) );
-
- /* and now dump out the compressed format */
- DEBUG_TRIE_COMPILE_r(dump_trie(trie, widecharmap, revcharmap, depth+1));
-
- { /* Modify the program and insert the new TRIE node*/
- U8 nodetype =(U8)(flags & 0xFF);
- char *str=NULL;
-
-#ifdef DEBUGGING
- regnode *optimize = NULL;
-#ifdef RE_TRACK_PATTERN_OFFSETS
-
- U32 mjd_offset = 0;
- U32 mjd_nodelen = 0;
-#endif /* RE_TRACK_PATTERN_OFFSETS */
-#endif /* DEBUGGING */
- /*
- This means we convert either the first branch or the first Exact,
- depending on whether the thing following (in 'last') is a branch
- or not and whther first is the startbranch (ie is it a sub part of
- the alternation or is it the whole thing.)
- Assuming its a sub part we conver the EXACT otherwise we convert
- the whole branch sequence, including the first.
- */
- /* Find the node we are going to overwrite */
- if ( first != startbranch || OP( last ) == BRANCH ) {
- /* branch sub-chain */
- NEXT_OFF( first ) = (U16)(last - first);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_r({
- mjd_offset= Node_Offset((convert));
- mjd_nodelen= Node_Length((convert));
- });
-#endif
- /* whole branch chain */
- }
-#ifdef RE_TRACK_PATTERN_OFFSETS
- else {
- DEBUG_r({
- const regnode *nop = NEXTOPER( convert );
- mjd_offset= Node_Offset((nop));
- mjd_nodelen= Node_Length((nop));
- });
- }
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%*sMJD offset:%"UVuf" MJD length:%"UVuf"\n",
- (int)depth * 2 + 2, "",
- (UV)mjd_offset, (UV)mjd_nodelen)
- );
-#endif
- /* But first we check to see if there is a common prefix we can
- split out as an EXACT and put in front of the TRIE node. */
- trie->startstate= 1;
- if ( trie->bitmap && !widecharmap && !trie->jump ) {
- U32 state;
- for ( state = 1 ; state < trie->statecount-1 ; state++ ) {
- U32 ofs = 0;
- I32 idx = -1;
- U32 count = 0;
- const U32 base = trie->states[ state ].trans.base;
-
- if ( trie->states[state].wordnum )
- count = 1;
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- if ( ++count > 1 ) {
- SV **tmp = av_fetch( revcharmap, ofs, 0);
- const U8 *ch = (U8*)SvPV_nolen_const( *tmp );
- if ( state == 1 ) break;
- if ( count == 2 ) {
- Zero(trie->bitmap, ANYOF_BITMAP_SIZE, char);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*sNew Start State=%"UVuf" Class: [",
- (int)depth * 2 + 2, "",
- (UV)state));
- if (idx >= 0) {
- SV ** const tmp = av_fetch( revcharmap, idx, 0);
- const U8 * const ch = (U8*)SvPV_nolen_const( *tmp );
-
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie, folder[ *ch ]);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%s", (char*)ch)
- );
- }
- }
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie,folder[ *ch ]);
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"%s", ch));
- }
- idx = ofs;
- }
- }
- if ( count == 1 ) {
- SV **tmp = av_fetch( revcharmap, idx, 0);
- STRLEN len;
- char *ch = SvPV( *tmp, len );
- DEBUG_OPTIMISE_r({
- SV *sv=sv_newmortal();
- PerlIO_printf( Perl_debug_log,
- "%*sPrefix State: %"UVuf" Idx:%"UVuf" Char='%s'\n",
- (int)depth * 2 + 2, "",
- (UV)state, (UV)idx,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 6,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- });
- if ( state==1 ) {
- OP( convert ) = nodetype;
- str=STRING(convert);
- STR_LEN(convert)=0;
- }
- STR_LEN(convert) += len;
- while (len--)
- *str++ = *ch++;
- } else {
-#ifdef DEBUGGING
- if (state>1)
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"]\n"));
-#endif
- break;
- }
- }
- if (str) {
- regnode *n = convert+NODE_SZ_STR(convert);
- NEXT_OFF(convert) = NODE_SZ_STR(convert);
- trie->startstate = state;
- trie->minlen -= (state - 1);
- trie->maxlen -= (state - 1);
-#ifdef DEBUGGING
- /* At least the UNICOS C compiler choked on this
- * being argument to DEBUG_r(), so let's just have
- * it right here. */
- if (
-#ifdef PERL_EXT_RE_BUILD
- 1
-#else
- DEBUG_r_TEST
-#endif
- ) {
- regnode *fix = convert;
- U32 word = trie->wordcount;
- mjd_nodelen++;
- Set_Node_Offset_Length(convert, mjd_offset, state - 1);
- while( ++fix < n ) {
- Set_Node_Offset_Length(fix, 0, 0);
- }
- while (word--) {
- SV ** const tmp = av_fetch( trie_words, word, 0 );
- if (tmp) {
- if ( STR_LEN(convert) <= SvCUR(*tmp) )
- sv_chop(*tmp, SvPV_nolen(*tmp) + STR_LEN(convert));
- else
- sv_chop(*tmp, SvPV_nolen(*tmp) + SvCUR(*tmp));
- }
- }
- }
-#endif
- if (trie->maxlen) {
- convert = n;
- } else {
- NEXT_OFF(convert) = (U16)(tail - convert);
- DEBUG_r(optimize= n);
- }
- }
- }
- if (!jumper)
- jumper = last;
- if ( trie->maxlen ) {
- NEXT_OFF( convert ) = (U16)(tail - convert);
- ARG_SET( convert, data_slot );
- /* Store the offset to the first unabsorbed branch in
- jump[0], which is otherwise unused by the jump logic.
- We use this when dumping a trie and during optimisation. */
- if (trie->jump)
- trie->jump[0] = (U16)(nextbranch - convert);
-
- /* XXXX */
- if ( !trie->states[trie->startstate].wordnum && trie->bitmap &&
- ( (char *)jumper - (char *)convert) >= (int)sizeof(struct regnode_charclass) )
- {
- OP( convert ) = TRIEC;
- Copy(trie->bitmap, ((struct regnode_charclass *)convert)->bitmap, ANYOF_BITMAP_SIZE, char);
- PerlMemShared_free(trie->bitmap);
- trie->bitmap= NULL;
- } else
- OP( convert ) = TRIE;
-
- /* store the type in the flags */
- convert->flags = nodetype;
- DEBUG_r({
- optimize = convert
- + NODE_STEP_REGNODE
- + regarglen[ OP( convert ) ];
- });
- /* XXX We really should free up the resource in trie now,
- as we won't use them - (which resources?) dmq */
- }
- /* needed for dumping*/
- DEBUG_r(if (optimize) {
- regnode *opt = convert;
-
- while ( ++opt < optimize) {
- Set_Node_Offset_Length(opt,0,0);
- }
- /*
- Try to clean up some of the debris left after the
- optimisation.
- */
- while( optimize < jumper ) {
- mjd_nodelen += Node_Length((optimize));
- OP( optimize ) = OPTIMIZED;
- Set_Node_Offset_Length(optimize,0,0);
- optimize++;
- }
- Set_Node_Offset_Length(convert,mjd_offset,mjd_nodelen);
- });
- } /* end node insert */
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, convert);
- RExC_rxi->data->data[ data_slot + 1 ] = (void*)widecharmap;
-#ifdef DEBUGGING
- RExC_rxi->data->data[ data_slot + TRIE_WORDS_OFFSET ] = (void*)trie_words;
- RExC_rxi->data->data[ data_slot + 3 ] = (void*)revcharmap;
-#else
- SvREFCNT_dec(revcharmap);
-#endif
- return trie->jump
- ? MADE_JUMP_TRIE
- : trie->startstate>1
- ? MADE_EXACT_TRIE
- : MADE_TRIE;
-}
-
-STATIC void
-S_make_trie_failtable(pTHX_ RExC_state_t *pRExC_state, regnode *source, regnode *stclass, U32 depth)
-{
-/* The Trie is constructed and compressed now so we can build a fail array now if its needed
-
- This is basically the Aho-Corasick algorithm. Its from exercise 3.31 and 3.32 in the
- "Red Dragon" -- Compilers, principles, techniques, and tools. Aho, Sethi, Ullman 1985/88
- ISBN 0-201-10088-6
-
- We find the fail state for each state in the trie, this state is the longest proper
- suffix of the current states 'word' that is also a proper prefix of another word in our
- trie. State 1 represents the word '' and is the thus the default fail state. This allows
- the DFA not to have to restart after its tried and failed a word at a given point, it
- simply continues as though it had been matching the other word in the first place.
- Consider
- 'abcdgu'=~/abcdefg|cdgu/
- When we get to 'd' we are still matching the first word, we would encounter 'g' which would
- fail, which would bring use to the state representing 'd' in the second word where we would
- try 'g' and succeed, prodceding to match 'cdgu'.
- */
- /* add a fail transition */
- const U32 trie_offset = ARG(source);
- reg_trie_data *trie=(reg_trie_data *)RExC_rxi->data->data[trie_offset];
- U32 *q;
- const U32 ucharcount = trie->uniquecharcount;
- const U32 numstates = trie->statecount;
- const U32 ubound = trie->lasttrans + ucharcount;
- U32 q_read = 0;
- U32 q_write = 0;
- U32 charid;
- U32 base = trie->states[ 1 ].trans.base;
- U32 *fail;
- reg_ac_data *aho;
- const U32 data_slot = add_data( pRExC_state, 1, "T" );
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE_FAILTABLE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
-
- ARG_SET( stclass, data_slot );
- aho = (reg_ac_data *) PerlMemShared_calloc( 1, sizeof(reg_ac_data) );
- RExC_rxi->data->data[ data_slot ] = (void*)aho;
- aho->trie=trie_offset;
- aho->states=(reg_trie_state *)PerlMemShared_malloc( numstates * sizeof(reg_trie_state) );
- Copy( trie->states, aho->states, numstates, reg_trie_state );
- Newxz( q, numstates, U32);
- aho->fail = (U32 *) PerlMemShared_calloc( numstates, sizeof(U32) );
- aho->refcount = 1;
- fail = aho->fail;
- /* initialize fail[0..1] to be 1 so that we always have
- a valid final fail state */
- fail[ 0 ] = fail[ 1 ] = 1;
-
- for ( charid = 0; charid < ucharcount ; charid++ ) {
- const U32 newstate = TRIE_TRANS_STATE( 1, base, ucharcount, charid, 0 );
- if ( newstate ) {
- q[ q_write ] = newstate;
- /* set to point at the root */
- fail[ q[ q_write++ ] ]=1;
- }
- }
- while ( q_read < q_write) {
- const U32 cur = q[ q_read++ % numstates ];
- base = trie->states[ cur ].trans.base;
-
- for ( charid = 0 ; charid < ucharcount ; charid++ ) {
- const U32 ch_state = TRIE_TRANS_STATE( cur, base, ucharcount, charid, 1 );
- if (ch_state) {
- U32 fail_state = cur;
- U32 fail_base;
- do {
- fail_state = fail[ fail_state ];
- fail_base = aho->states[ fail_state ].trans.base;
- } while ( !TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ) );
-
- fail_state = TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 );
- fail[ ch_state ] = fail_state;
- if ( !aho->states[ ch_state ].wordnum && aho->states[ fail_state ].wordnum )
- {
- aho->states[ ch_state ].wordnum = aho->states[ fail_state ].wordnum;
- }
- q[ q_write++ % numstates] = ch_state;
- }
- }
- }
- /* restore fail[0..1] to 0 so that we "fall out" of the AC loop
- when we fail in state 1, this allows us to use the
- charclass scan to find a valid start char. This is based on the principle
- that theres a good chance the string being searched contains lots of stuff
- that cant be a start char.
- */
- fail[ 0 ] = fail[ 1 ] = 0;
- DEBUG_TRIE_COMPILE_r({
- PerlIO_printf(Perl_debug_log,
- "%*sStclass Failtable (%"UVuf" states): 0",
- (int)(depth * 2), "", (UV)numstates
- );
- for( q_read=1; q_read<numstates; q_read++ ) {
- PerlIO_printf(Perl_debug_log, ", %"UVuf, (UV)fail[q_read]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
- Safefree(q);
- /*RExC_seen |= REG_SEEN_TRIEDFA;*/
-}
-
-
-/*
- * There are strange code-generation bugs caused on sparc64 by gcc-2.95.2.
- * These need to be revisited when a newer toolchain becomes available.
- */
-#if defined(__sparc64__) && defined(__GNUC__)
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
-# undef SPARC64_GCC_WORKAROUND
-# define SPARC64_GCC_WORKAROUND 1
-# endif
-#endif
-
-#define DEBUG_PEEP(str,scan,depth) \
- DEBUG_OPTIMISE_r({if (scan){ \
- SV * const mysv=sv_newmortal(); \
- regnode *Next = regnext(scan); \
- regprop(RExC_rx, mysv, scan); \
- PerlIO_printf(Perl_debug_log, "%*s" str ">%3d: %s (%d)\n", \
- (int)depth*2, "", REG_NODE_NUM(scan), SvPV_nolen_const(mysv),\
- Next ? (REG_NODE_NUM(Next)) : 0 ); \
- }});
-
-
-
-
-
-#define JOIN_EXACT(scan,min,flags) \
- if (PL_regkind[OP(scan)] == EXACT) \
- join_exact(pRExC_state,(scan),(min),(flags),NULL,depth+1)
-
-STATIC U32
-S_join_exact(pTHX_ RExC_state_t *pRExC_state, regnode *scan, I32 *min, U32 flags,regnode *val, U32 depth) {
- /* Merge several consecutive EXACTish nodes into one. */
- regnode *n = regnext(scan);
- U32 stringok = 1;
- regnode *next = scan + NODE_SZ_STR(scan);
- U32 merged = 0;
- U32 stopnow = 0;
-#ifdef DEBUGGING
- regnode *stop = scan;
- GET_RE_DEBUG_FLAGS_DECL;
-#else
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_JOIN_EXACT;
-#ifndef EXPERIMENTAL_INPLACESCAN
- PERL_UNUSED_ARG(flags);
- PERL_UNUSED_ARG(val);
-#endif
- DEBUG_PEEP("join",scan,depth);
-
- /* Skip NOTHING, merge EXACT*. */
- while (n &&
- ( PL_regkind[OP(n)] == NOTHING ||
- (stringok && (OP(n) == OP(scan))))
- && NEXT_OFF(n)
- && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) {
-
- if (OP(n) == TAIL || n > next)
- stringok = 0;
- if (PL_regkind[OP(n)] == NOTHING) {
- DEBUG_PEEP("skip:",n,depth);
- NEXT_OFF(scan) += NEXT_OFF(n);
- next = n + NODE_STEP_REGNODE;
-#ifdef DEBUGGING
- if (stringok)
- stop = n;
-#endif
- n = regnext(n);
- }
- else if (stringok) {
- const unsigned int oldl = STR_LEN(scan);
- regnode * const nnext = regnext(n);
-
- DEBUG_PEEP("merg",n,depth);
-
- merged++;
- if (oldl + STR_LEN(n) > U8_MAX)
- break;
- NEXT_OFF(scan) += NEXT_OFF(n);
- STR_LEN(scan) += STR_LEN(n);
- next = n + NODE_SZ_STR(n);
- /* Now we can overwrite *n : */
- Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char);
-#ifdef DEBUGGING
- stop = next - 1;
-#endif
- n = nnext;
- if (stopnow) break;
- }
-
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (flags && !NEXT_OFF(n)) {
- DEBUG_PEEP("atch", val, depth);
- if (reg_off_by_arg[OP(n)]) {
- ARG_SET(n, val - n);
- }
- else {
- NEXT_OFF(n) = val - n;
- }
- stopnow = 1;
- }
-#endif
- }
-
- if (UTF && ( OP(scan) == EXACTF ) && ( STR_LEN(scan) >= 6 ) ) {
- /*
- Two problematic code points in Unicode casefolding of EXACT nodes:
-
- U+0390 - GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS
- U+03B0 - GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS
-
- which casefold to
-
- Unicode UTF-8
-
- U+03B9 U+0308 U+0301 0xCE 0xB9 0xCC 0x88 0xCC 0x81
- U+03C5 U+0308 U+0301 0xCF 0x85 0xCC 0x88 0xCC 0x81
-
- This means that in case-insensitive matching (or "loose matching",
- as Unicode calls it), an EXACTF of length six (the UTF-8 encoded byte
- length of the above casefolded versions) can match a target string
- of length two (the byte length of UTF-8 encoded U+0390 or U+03B0).
- This would rather mess up the minimum length computation.
-
- What we'll do is to look for the tail four bytes, and then peek
- at the preceding two bytes to see whether we need to decrease
- the minimum length by four (six minus two).
-
- Thanks to the design of UTF-8, there cannot be false matches:
- A sequence of valid UTF-8 bytes cannot be a subsequence of
- another valid sequence of UTF-8 bytes.
-
- */
- char * const s0 = STRING(scan), *s, *t;
- char * const s1 = s0 + STR_LEN(scan) - 1;
- char * const s2 = s1 - 4;
-#ifdef EBCDIC /* RD tunifold greek 0390 and 03B0 */
- const char t0[] = "\xaf\x49\xaf\x42";
-#else
- const char t0[] = "\xcc\x88\xcc\x81";
-#endif
- const char * const t1 = t0 + 3;
-
- for (s = s0 + 2;
- s < s2 && (t = ninstr(s, s1, t0, t1));
- s = t + 4) {
-#ifdef EBCDIC
- if (((U8)t[-1] == 0x68 && (U8)t[-2] == 0xB4) ||
- ((U8)t[-1] == 0x46 && (U8)t[-2] == 0xB5))
-#else
- if (((U8)t[-1] == 0xB9 && (U8)t[-2] == 0xCE) ||
- ((U8)t[-1] == 0x85 && (U8)t[-2] == 0xCF))
-#endif
- *min -= 4;
- }
- }
-
-#ifdef DEBUGGING
- /* Allow dumping */
- n = scan + NODE_SZ_STR(scan);
- while (n <= stop) {
- if (PL_regkind[OP(n)] != NOTHING || OP(n) == NOTHING) {
- OP(n) = OPTIMIZED;
- NEXT_OFF(n) = 0;
- }
- n++;
- }
-#endif
- DEBUG_OPTIMISE_r(if (merged){DEBUG_PEEP("finl",scan,depth)});
- return stopnow;
-}
-
-/* REx optimizer. Converts nodes into quickier variants "in place".
- Finds fixed substrings. */
-
-/* Stops at toplevel WHILEM as well as at "last". At end *scanp is set
- to the position after last scanned or to NULL. */
-
-#define INIT_AND_WITHP \
- assert(!and_withp); \
- Newx(and_withp,1,struct regnode_charclass_class); \
- SAVEFREEPV(and_withp)
-
-/* this is a chain of data about sub patterns we are processing that
- need to be handled seperately/specially in study_chunk. Its so
- we can simulate recursion without losing state. */
-struct scan_frame;
-typedef struct scan_frame {
- regnode *last; /* last node to process in this frame */
- regnode *next; /* next node to process when last is reached */
- struct scan_frame *prev; /*previous frame*/
- I32 stop; /* what stopparen do we use */
-} scan_frame;
-
-
-#define SCAN_COMMIT(s, data, m) scan_commit(s, data, m, is_inf)
-
-#define CASE_SYNST_FNC(nAmE) \
-case nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break; \
-case N ## nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break
-
-
-
-STATIC I32
-S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp,
- I32 *minlenp, I32 *deltap,
- regnode *last,
- scan_data_t *data,
- I32 stopparen,
- U8* recursed,
- struct regnode_charclass_class *and_withp,
- U32 flags, U32 depth)
- /* scanp: Start here (read-write). */
- /* deltap: Write maxlen-minlen here. */
- /* last: Stop before this one. */
- /* data: string data about the pattern */
- /* stopparen: treat close N as END */
- /* recursed: which subroutines have we recursed into */
- /* and_withp: Valid if flags & SCF_DO_STCLASS_OR */
-{
- dVAR;
- I32 min = 0, pars = 0, code;
- regnode *scan = *scanp, *next;
- I32 delta = 0;
- int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF);
- int is_inf_internal = 0; /* The studied chunk is infinite */
- I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0;
- scan_data_t data_fake;
- SV *re_trie_maxbuff = NULL;
- regnode *first_non_open = scan;
- I32 stopmin = I32_MAX;
- scan_frame *frame = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_STUDY_CHUNK;
-
-#ifdef DEBUGGING
- StructCopy(&zero_scan_data, &data_fake, scan_data_t);
-#endif
-
- if ( depth == 0 ) {
- while (first_non_open && OP(first_non_open) == OPEN)
- first_non_open=regnext(first_non_open);
- }
-
-
- fake_study_recurse:
- while ( scan && OP(scan) != END && scan < last ){
- /* Peephole optimizer: */
- DEBUG_STUDYDATA("Peep:", data,depth);
- DEBUG_PEEP("Peep",scan,depth);
- JOIN_EXACT(scan,&min,0);
-
- /* Follow the next-chain of the current node and optimize
- away all the NOTHINGs from it. */
- if (OP(scan) != CURLYX) {
- const int max = (reg_off_by_arg[OP(scan)]
- ? I32_MAX
- /* I32 may be smaller than U16 on CRAYs! */
- : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX));
- int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan));
- int noff;
- regnode *n = scan;
-
- /* Skip NOTHING and LONGJMP. */
- while ((n = regnext(n))
- && ((PL_regkind[OP(n)] == NOTHING && (noff = NEXT_OFF(n)))
- || ((OP(n) == LONGJMP) && (noff = ARG(n))))
- && off + noff < max)
- off += noff;
- if (reg_off_by_arg[OP(scan)])
- ARG(scan) = off;
- else
- NEXT_OFF(scan) = off;
- }
-
-
-
- /* The principal pseudo-switch. Cannot be a switch, since we
- look into several different things. */
- if (OP(scan) == BRANCH || OP(scan) == BRANCHJ
- || OP(scan) == IFTHEN) {
- next = regnext(scan);
- code = OP(scan);
- /* demq: the op(next)==code check is to see if we have "branch-branch" AFAICT */
-
- if (OP(next) == code || code == IFTHEN) {
- /* NOTE - There is similar code to this block below for handling
- TRIE nodes on a re-study. If you change stuff here check there
- too. */
- I32 max1 = 0, min1 = I32_MAX, num = 0;
- struct regnode_charclass_class accum;
- regnode * const startbranch=scan;
-
- if (flags & SCF_DO_SUBSTR)
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- while (OP(scan) == code) {
- I32 deltanext, minnext, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- num++;
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
-
- data_fake.pos_delta = delta;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- if (code != BRANCH)
- scan = NEXTOPER(scan);
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- /* we suppose the run is continuous, last=next...*/
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- next, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- if (min1 > minnext)
- min1 = minnext;
- if (max1 < minnext + deltanext)
- max1 = minnext + deltanext;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
- scan = next;
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > minnext)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- if (code == IFTHEN && num < 2) /* Empty ELSE branch */
- min1 = 0;
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
-
- if (PERL_ENABLE_TRIE_OPTIMISATION && OP( startbranch ) == BRANCH ) {
- /* demq.
-
- Assuming this was/is a branch we are dealing with: 'scan' now
- points at the item that follows the branch sequence, whatever
- it is. We now start at the beginning of the sequence and look
- for subsequences of
-
- BRANCH->EXACT=>x1
- BRANCH->EXACT=>x2
- tail
-
- which would be constructed from a pattern like /A|LIST|OF|WORDS/
-
- If we can find such a subseqence we need to turn the first
- element into a trie and then add the subsequent branch exact
- strings to the trie.
-
- We have two cases
-
- 1. patterns where the whole set of branch can be converted.
-
- 2. patterns where only a subset can be converted.
-
- In case 1 we can replace the whole set with a single regop
- for the trie. In case 2 we need to keep the start and end
- branchs so
-
- 'BRANCH EXACT; BRANCH EXACT; BRANCH X'
- becomes BRANCH TRIE; BRANCH X;
-
- There is an additional case, that being where there is a
- common prefix, which gets split out into an EXACT like node
- preceding the TRIE node.
-
- If x(1..n)==tail then we can do a simple trie, if not we make
- a "jump" trie, such that when we match the appropriate word
- we "jump" to the appopriate tail node. Essentailly we turn
- a nested if into a case structure of sorts.
-
- */
-
- int made=0;
- if (!re_trie_maxbuff) {
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff))
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- if ( SvIV(re_trie_maxbuff)>=0 ) {
- regnode *cur;
- regnode *first = (regnode *)NULL;
- regnode *last = (regnode *)NULL;
- regnode *tail = scan;
- U8 optype = 0;
- U32 count=0;
-
-#ifdef DEBUGGING
- SV * const mysv = sv_newmortal(); /* for dumping */
-#endif
- /* var tail is used because there may be a TAIL
- regop in the way. Ie, the exacts will point to the
- thing following the TAIL, but the last branch will
- point at the TAIL. So we advance tail. If we
- have nested (?:) we may have to move through several
- tails.
- */
-
- while ( OP( tail ) == TAIL ) {
- /* this is the TAIL generated by (?:) */
- tail = regnext( tail );
- }
-
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, tail );
- PerlIO_printf( Perl_debug_log, "%*s%s%s\n",
- (int)depth * 2 + 2, "",
- "Looking for TRIE'able sequences. Tail node is: ",
- SvPV_nolen_const( mysv )
- );
- });
-
- /*
-
- step through the branches, cur represents each
- branch, noper is the first thing to be matched
- as part of that branch and noper_next is the
- regnext() of that node. if noper is an EXACT
- and noper_next is the same as scan (our current
- position in the regex) then the EXACT branch is
- a possible optimization target. Once we have
- two or more consequetive such branches we can
- create a trie of the EXACT's contents and stich
- it in place. If the sequence represents all of
- the branches we eliminate the whole thing and
- replace it with a single TRIE. If it is a
- subsequence then we need to stitch it in. This
- means the first branch has to remain, and needs
- to be repointed at the item on the branch chain
- following the last branch optimized. This could
- be either a BRANCH, in which case the
- subsequence is internal, or it could be the
- item following the branch sequence in which
- case the subsequence is at the end.
-
- */
-
- /* dont use tail as the end marker for this traverse */
- for ( cur = startbranch ; cur != scan ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
-#if defined(DEBUGGING) || defined(NOJUMPTRIE)
- regnode * const noper_next = regnext( noper );
-#endif
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log, "%*s- %s (%d)",
- (int)depth * 2 + 2,"", SvPV_nolen_const( mysv ), REG_NODE_NUM(cur) );
-
- regprop(RExC_rx, mysv, noper);
- PerlIO_printf( Perl_debug_log, " -> %s",
- SvPV_nolen_const(mysv));
-
- if ( noper_next ) {
- regprop(RExC_rx, mysv, noper_next );
- PerlIO_printf( Perl_debug_log,"\t=> %s\t",
- SvPV_nolen_const(mysv));
- }
- PerlIO_printf( Perl_debug_log, "(First==%d,Last==%d,Cur==%d)\n",
- REG_NODE_NUM(first), REG_NODE_NUM(last), REG_NODE_NUM(cur) );
- });
- if ( (((first && optype!=NOTHING) ? OP( noper ) == optype
- : PL_regkind[ OP( noper ) ] == EXACT )
- || OP(noper) == NOTHING )
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- && count < U16_MAX)
- {
- count++;
- if ( !first || optype == NOTHING ) {
- if (!first) first = cur;
- optype = OP( noper );
- } else {
- last = cur;
- }
- } else {
-/*
- Currently we assume that the trie can handle unicode and ascii
- matches fold cased matches. If this proves true then the following
- define will prevent tries in this situation.
-
- #define TRIE_TYPE_IS_SAFE (UTF || optype==EXACT)
-*/
-#define TRIE_TYPE_IS_SAFE 1
- if ( last && TRIE_TYPE_IS_SAFE ) {
- make_trie( pRExC_state,
- startbranch, first, cur, tail, count,
- optype, depth+1 );
- }
- if ( PL_regkind[ OP( noper ) ] == EXACT
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- ){
- count = 1;
- first = cur;
- optype = OP( noper );
- } else {
- count = 0;
- first = NULL;
- optype = 0;
- }
- last = NULL;
- }
- }
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log,
- "%*s- %s (%d) <SCAN FINISHED>\n", (int)depth * 2 + 2,
- "", SvPV_nolen_const( mysv ),REG_NODE_NUM(cur));
-
- });
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- made= make_trie( pRExC_state, startbranch, first, scan, tail, count, optype, depth+1 );
-#ifdef TRIE_STUDY_OPT
- if ( ((made == MADE_EXACT_TRIE &&
- startbranch == first)
- || ( first_non_open == first )) &&
- depth==0 ) {
- flags |= SCF_TRIE_RESTUDY;
- if ( startbranch == first
- && scan == tail )
- {
- RExC_seen &=~REG_TOP_LEVEL_BRANCHES;
- }
- }
-#endif
- }
- }
-
- } /* do trie */
-
- }
- else if ( code == BRANCHJ ) { /* single branch is optimized. */
- scan = NEXTOPER(NEXTOPER(scan));
- } else /* single branch is optimized. */
- scan = NEXTOPER(scan);
- continue;
- } else if (OP(scan) == SUSPEND || OP(scan) == GOSUB || OP(scan) == GOSTART) {
- scan_frame *newframe = NULL;
- I32 paren;
- regnode *start;
- regnode *end;
-
- if (OP(scan) != SUSPEND) {
- /* set the pointer */
- if (OP(scan) == GOSUB) {
- paren = ARG(scan);
- RExC_recurse[ARG2L(scan)] = scan;
- start = RExC_open_parens[paren-1];
- end = RExC_close_parens[paren-1];
- } else {
- paren = 0;
- start = RExC_rxi->program + 1;
- end = RExC_opend;
- }
- if (!recursed) {
- Newxz(recursed, (((RExC_npar)>>3) +1), U8);
- SAVEFREEPV(recursed);
- }
- if (!PAREN_TEST(recursed,paren+1)) {
- PAREN_SET(recursed,paren+1);
- Newx(newframe,1,scan_frame);
- } else {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- } else {
- Newx(newframe,1,scan_frame);
- paren = stopparen;
- start = scan+2;
- end = regnext(scan);
- }
- if (newframe) {
- assert(start);
- assert(end);
- SAVEFREEPV(newframe);
- newframe->next = regnext(scan);
- newframe->last = last;
- newframe->stop = stopparen;
- newframe->prev = frame;
-
- frame = newframe;
- scan = start;
- stopparen = paren;
- last = end;
-
- continue;
- }
- }
- else if (OP(scan) == EXACT) {
- I32 l = STR_LEN(scan);
- UV uc;
- if (UTF) {
- const U8 * const s = (U8*)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- } else {
- uc = *((U8*)STRING(scan));
- }
- min += l;
- if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */
- /* The code below prefers earlier match for fixed
- offset, later match for variable offset. */
- if (data->last_end == -1) { /* Update the start info. */
- data->last_start_min = data->pos_min;
- data->last_start_max = is_inf
- ? I32_MAX : data->pos_min + data->pos_delta;
- }
- sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan));
- if (UTF)
- SvUTF8_on(data->last_found);
- {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += utf8_length((U8*)STRING(scan),
- (U8*)STRING(scan)+STR_LEN(scan));
- }
- data->last_end = data->pos_min + l;
- data->pos_min += l; /* As in the first entry. */
- data->flags &= ~SF_BEFORE_EOL;
- }
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && (!(data->start_class->flags & ANYOF_FOLD)
- || !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- )
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- if (uc < 0x100)
- data->start_class->flags &= ~ANYOF_UNICODE_ALL;
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- /* false positive possible if the class is case-folded */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- else
- data->start_class->flags |= ANYOF_UNICODE_ALL;
- data->start_class->flags &= ~ANYOF_EOS;
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (PL_regkind[OP(scan)] == EXACT) { /* But OP != EXACT! */
- I32 l = STR_LEN(scan);
- UV uc = *((U8*)STRING(scan));
-
- /* Search for fixed substrings supports EXACT only. */
- if (flags & SCF_DO_SUBSTR) {
- assert(data);
- SCAN_COMMIT(pRExC_state, data, minlenp);
- }
- if (UTF) {
- const U8 * const s = (U8 *)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- }
- min += l;
- if (flags & SCF_DO_SUBSTR)
- data->pos_min += l;
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat) {
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- data->start_class->flags |= ANYOF_FOLD;
- if (OP(scan) == EXACTFL)
- data->start_class->flags |= ANYOF_LOCALE;
- }
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- if (data->start_class->flags & ANYOF_FOLD) {
- /* false positive possible if the class is case-folded.
- Assume that the locale settings are the same... */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- }
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (strchr((const char*)PL_varies,OP(scan))) {
- I32 mincount, maxcount, minnext, deltanext, fl = 0;
- I32 f = flags, pos_before = 0;
- regnode * const oscan = scan;
- struct regnode_charclass_class this_class;
- struct regnode_charclass_class *oclass = NULL;
- I32 next_is_eval = 0;
-
- switch (PL_regkind[OP(scan)]) {
- case WHILEM: /* End of (?:...)* . */
- scan = NEXTOPER(scan);
- goto finish;
- case PLUS:
- if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) {
- next = NEXTOPER(scan);
- if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) {
- mincount = 1;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- }
- if (flags & SCF_DO_SUBSTR)
- data->pos_min++;
- min++;
- /* Fall through. */
- case STAR:
- if (flags & SCF_DO_STCLASS) {
- mincount = 0;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- is_inf = is_inf_internal = 1;
- scan = regnext(scan);
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot extend fixed substrings */
- data->longest = &(data->longest_float);
- }
- goto optimize_curly_tail;
- case CURLY:
- if (stopparen>0 && (OP(scan)==CURLYN || OP(scan)==CURLYM)
- && (scan->flags == stopparen))
- {
- mincount = 1;
- maxcount = 1;
- } else {
- mincount = ARG1(scan);
- maxcount = ARG2(scan);
- }
- next = regnext(scan);
- if (OP(scan) == CURLYX) {
- I32 lp = (data ? *(data->last_closep) : 0);
- scan->flags = ((lp <= (I32)U8_MAX) ? (U8)lp : U8_MAX);
- }
- scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- next_is_eval = (OP(scan) == EVAL);
- do_curly:
- if (flags & SCF_DO_SUBSTR) {
- if (mincount == 0) SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot extend fixed substrings */
- pos_before = data->pos_min;
- }
- if (data) {
- fl = data->flags;
- data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL);
- if (is_inf)
- data->flags |= SF_IS_INF;
- }
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- oclass = data->start_class;
- data->start_class = &this_class;
- f |= SCF_DO_STCLASS_AND;
- f &= ~SCF_DO_STCLASS_OR;
- }
- /* These are the cases when once a subexpression
- fails at a particular position, it cannot succeed
- even after backtracking at the enclosing scope.
-
- XXXX what if minimal match and we are at the
- initial run of {n,m}? */
- if ((mincount != maxcount - 1) && (maxcount != REG_INFTY))
- f &= ~SCF_WHILEM_VISITED_POS;
-
- /* This will finish on WHILEM, setting scan, or on NULL: */
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- last, data, stopparen, recursed, NULL,
- (mincount == 0
- ? (f & ~SCF_DO_SUBSTR) : f),depth+1);
-
- if (flags & SCF_DO_STCLASS)
- data->start_class = oclass;
- if (mincount == 0 || minnext == 0) {
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&this_class, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- } else { /* Non-zero len */
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- cl_and(data->start_class, and_withp);
- }
- else if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class, &this_class);
- flags &= ~SCF_DO_STCLASS;
- }
- if (!scan) /* It was not CURLYX, but CURLY. */
- scan = next;
- if ( /* ? quantifier ok, except for (?{ ... }) */
- (next_is_eval || !(mincount == 0 && maxcount == 1))
- && (minnext == 0) && (deltanext == 0)
- && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR))
- && maxcount <= REG_INFTY/3) /* Complement check for big count */
- {
- ckWARNreg(RExC_parse,
- "Quantifier unexpected on zero-length expression");
- }
-
- min += minnext * mincount;
- is_inf_internal |= ((maxcount == REG_INFTY
- && (minnext + deltanext) > 0)
- || deltanext == I32_MAX);
- is_inf |= is_inf_internal;
- delta += (minnext + deltanext) * maxcount - minnext * mincount;
-
- /* Try powerful optimization CURLYX => CURLYN. */
- if ( OP(oscan) == CURLYX && data
- && data->flags & SF_IN_PAR
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext && minnext == 1 ) {
- /* Try to optimize to CURLYN. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS;
- regnode * const nxt1 = nxt;
-#ifdef DEBUGGING
- regnode *nxt2;
-#endif
-
- /* Skip open. */
- nxt = regnext(nxt);
- if (!strchr((const char*)PL_simple,OP(nxt))
- && !(PL_regkind[OP(nxt)] == EXACT
- && STR_LEN(nxt) == 1))
- goto nogo;
-#ifdef DEBUGGING
- nxt2 = nxt;
-#endif
- nxt = regnext(nxt);
- if (OP(nxt) != CLOSE)
- goto nogo;
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt+2; /*close->while*/
- }
- /* Now we know that nxt2 is the only contents: */
- oscan->flags = (U8)ARG(nxt);
- OP(oscan) = CURLYN;
- OP(nxt1) = NOTHING; /* was OPEN. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */
-#endif
- }
- nogo:
-
- /* Try optimization CURLYX => CURLYM. */
- if ( OP(oscan) == CURLYX && data
- && !(data->flags & SF_HAS_PAR)
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext /* atom is fixed width */
- && minnext != 0 /* CURLYM can't handle zero width */
- ) {
- /* XXXX How to optimize if data == 0? */
- /* Optimize to a simpler form. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */
- regnode *nxt2;
-
- OP(oscan) = CURLYM;
- while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/
- && (OP(nxt2) != WHILEM))
- nxt = nxt2;
- OP(nxt2) = SUCCEED; /* Whas WHILEM */
- /* Need to optimize away parenths. */
- if (data->flags & SF_IN_PAR) {
- /* Set the parenth number. */
- regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/
-
- if (OP(nxt) != CLOSE)
- FAIL("Panic opt close");
- oscan->flags = (U8)ARG(nxt);
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt2+1; /*close->NOTHING*/
- }
- OP(nxt1) = OPTIMIZED; /* was OPEN. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */
-#endif
-#if 0
- while ( nxt1 && (OP(nxt1) != WHILEM)) {
- regnode *nnxt = regnext(nxt1);
-
- if (nnxt == nxt) {
- if (reg_off_by_arg[OP(nxt1)])
- ARG_SET(nxt1, nxt2 - nxt1);
- else if (nxt2 - nxt1 < U16_MAX)
- NEXT_OFF(nxt1) = nxt2 - nxt1;
- else
- OP(nxt) = NOTHING; /* Cannot beautify */
- }
- nxt1 = nnxt;
- }
-#endif
- /* Optimize again: */
- study_chunk(pRExC_state, &nxt1, minlenp, &deltanext, nxt,
- NULL, stopparen, recursed, NULL, 0,depth+1);
- }
- else
- oscan->flags = 0;
- }
- else if ((OP(oscan) == CURLYX)
- && (flags & SCF_WHILEM_VISITED_POS)
- /* See the comment on a similar expression above.
- However, this time it not a subexpression
- we care about, but the expression itself. */
- && (maxcount == REG_INFTY)
- && data && ++data->whilem_c < 16) {
- /* This stays as CURLYX, we can put the count/of pair. */
- /* Find WHILEM (as in regexec.c) */
- regnode *nxt = oscan + NEXT_OFF(oscan);
-
- if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */
- nxt += ARG(nxt);
- PREVOPER(nxt)->flags = (U8)(data->whilem_c
- | (RExC_whilem_seen << 4)); /* On WHILEM */
- }
- if (data && fl & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (flags & SCF_DO_SUBSTR) {
- SV *last_str = NULL;
- int counted = mincount != 0;
-
- if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */
-#if defined(SPARC64_GCC_WORKAROUND)
- I32 b = 0;
- STRLEN l = 0;
- const char *s = NULL;
- I32 old = 0;
-
- if (pos_before >= data->last_start_min)
- b = pos_before;
- else
- b = data->last_start_min;
-
- l = 0;
- s = SvPV_const(data->last_found, l);
- old = b - data->last_start_min;
-
-#else
- I32 b = pos_before >= data->last_start_min
- ? pos_before : data->last_start_min;
- STRLEN l;
- const char * const s = SvPV_const(data->last_found, l);
- I32 old = b - data->last_start_min;
-#endif
-
- if (UTF)
- old = utf8_hop((U8*)s, old) - (U8*)s;
-
- l -= old;
- /* Get the added string: */
- last_str = newSVpvn_utf8(s + old, l, UTF);
- if (deltanext == 0 && pos_before == b) {
- /* What was added is a constant string */
- if (mincount > 1) {
- SvGROW(last_str, (mincount * l) + 1);
- repeatcpy(SvPVX(last_str) + l,
- SvPVX_const(last_str), l, mincount - 1);
- SvCUR_set(last_str, SvCUR(last_str) * mincount);
- /* Add additional parts. */
- SvCUR_set(data->last_found,
- SvCUR(data->last_found) - l);
- sv_catsv(data->last_found, last_str);
- {
- SV * sv = data->last_found;
- MAGIC *mg =
- SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += CHR_SVLEN(last_str) - l;
- }
- data->last_end += l * (mincount - 1);
- }
- } else {
- /* start offset must point into the last copy */
- data->last_start_min += minnext * (mincount - 1);
- data->last_start_max += is_inf ? I32_MAX
- : (maxcount - 1) * (minnext + data->pos_delta);
- }
- }
- /* It is counted once already... */
- data->pos_min += minnext * (mincount - counted);
- data->pos_delta += - counted * deltanext +
- (minnext + deltanext) * maxcount - minnext * mincount;
- if (mincount != maxcount) {
- /* Cannot extend fixed substrings found inside
- the group. */
- SCAN_COMMIT(pRExC_state,data,minlenp);
- if (mincount && last_str) {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
-
- if (mg)
- mg->mg_len = -1;
- sv_setsv(sv, last_str);
- data->last_end = data->pos_min;
- data->last_start_min =
- data->pos_min - CHR_SVLEN(last_str);
- data->last_start_max = is_inf
- ? I32_MAX
- : data->pos_min + data->pos_delta
- - CHR_SVLEN(last_str);
- }
- data->longest = &(data->longest_float);
- }
- SvREFCNT_dec(last_str);
- }
- if (data && (fl & SF_HAS_EVAL))
- data->flags |= SF_HAS_EVAL;
- optimize_curly_tail:
- if (OP(oscan) != CURLYX) {
- while (PL_regkind[OP(next = regnext(oscan))] == NOTHING
- && NEXT_OFF(next))
- NEXT_OFF(oscan) += NEXT_OFF(next);
- }
- continue;
- default: /* REF and CLUMP only? */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR)
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- break;
- }
- }
- else if (OP(scan) == LNBREAK) {
- if (flags & SCF_DO_STCLASS) {
- int value = 0;
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
- if (flags & SCF_DO_STCLASS_AND) {
- for (value = 0; value < 256; value++)
- if (!is_VERTWS_cp(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- for (value = 0; value < 256; value++)
- if (is_VERTWS_cp(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- min += 1;
- delta += 1;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += 1;
- data->longest = &(data->longest_float);
- }
-
- }
- else if (OP(scan) == FOLDCHAR) {
- int d = ARG(scan)==0xDF ? 1 : 2;
- flags &= ~SCF_DO_STCLASS;
- min += 1;
- delta += d;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += d;
- data->longest = &(data->longest_float);
- }
- }
- else if (strchr((const char*)PL_simple,OP(scan))) {
- int value = 0;
-
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->pos_min++;
- }
- min++;
- if (flags & SCF_DO_STCLASS) {
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
-
- /* Some of the logic below assumes that switching
- locale on will only add false positives. */
- switch (PL_regkind[OP(scan)]) {
- case SANY:
- default:
- do_default:
- /* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- break;
- case REG_ANY:
- if (OP(scan) == SANY)
- goto do_default;
- if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */
- value = (ANYOF_BITMAP_TEST(data->start_class,'\n')
- || (data->start_class->flags & ANYOF_CLASS));
- cl_anything(pRExC_state, data->start_class);
- }
- if (flags & SCF_DO_STCLASS_AND || !value)
- ANYOF_BITMAP_CLEAR(data->start_class,'\n');
- break;
- case ANYOF:
- if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class,
- (struct regnode_charclass_class*)scan);
- else
- cl_or(pRExC_state, data->start_class,
- (struct regnode_charclass_class*)scan);
- break;
- case ALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case ALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- }
- else {
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- data->start_class->flags |= ANYOF_LOCALE;
- }
- break;
- case NALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- }
- break;
- case SPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- else {
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case SPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- }
- break;
- case NSPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- else {
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NSPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- }
- break;
- case DIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT);
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NDIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT);
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- CASE_SYNST_FNC(VERTWS);
- CASE_SYNST_FNC(HORIZWS);
-
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (PL_regkind[OP(scan)] == EOL && flags & SCF_DO_SUBSTR) {
- data->flags |= (OP(scan) == MEOL
- ? SF_BEFORE_MEOL
- : SF_BEFORE_SEOL);
- }
- else if ( PL_regkind[OP(scan)] == BRANCHJ
- /* Lookbehind, or need to calculate parens/evals/stclass: */
- && (scan->flags || data || (flags & SCF_DO_STCLASS))
- && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) {
- if ( !PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- || OP(scan) == UNLESSM )
- {
- /* Negative Lookahead/lookbehind
- In this case we can't do fixed string optimisation.
- */
-
- I32 deltanext, minnext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
- minnext = study_chunk(pRExC_state, &nscan, minlenp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f, depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (minnext > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)minnext;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (f & SCF_DO_STCLASS_AND) {
- if (flags & SCF_DO_STCLASS_OR) {
- /* OR before, AND after: ideally we would recurse with
- * data_fake to get the AND applied by study of the
- * remainder of the pattern, and then derecurse;
- * *** HACK *** for now just treat as "no information".
- * See [perl #56690].
- */
- cl_init(pRExC_state, data->start_class);
- } else {
- /* AND before and after: combine and continue */
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- }
-#if PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- else {
- /* Positive Lookahead/lookbehind
- In this case we can do fixed string optimisation,
- but we must be careful about it. Note in the case of
- lookbehind the positions will be offset by the minimum
- length of the pattern, something we won't know about
- until after the recurse.
- */
- I32 deltanext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
- /* We use SAVEFREEPV so that when the full compile
- is finished perl will clean up the allocated
- minlens when its all done. This was we don't
- have to worry about freeing them when we know
- they wont be used, which would be a pain.
- */
- I32 *minnextp;
- Newx( minnextp, 1, I32 );
- SAVEFREEPV(minnextp);
-
- if (data) {
- StructCopy(data, &data_fake, scan_data_t);
- if ((flags & SCF_DO_SUBSTR) && data->last_found) {
- f |= SCF_DO_SUBSTR;
- if (scan->flags)
- SCAN_COMMIT(pRExC_state, &data_fake,minlenp);
- data_fake.last_found=newSVsv(data->last_found);
- }
- }
- else
- data_fake.last_closep = &fake;
- data_fake.flags = 0;
- data_fake.pos_delta = delta;
- if (is_inf)
- data_fake.flags |= SF_IS_INF;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
-
- *minnextp = study_chunk(pRExC_state, &nscan, minnextp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f,depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (*minnextp > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)*minnextp;
- }
-
- *minnextp += min;
-
- if (f & SCF_DO_STCLASS_AND) {
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- if ((flags & SCF_DO_SUBSTR) && data_fake.last_found) {
- if (RExC_rx->minlen<*minnextp)
- RExC_rx->minlen=*minnextp;
- SCAN_COMMIT(pRExC_state, &data_fake, minnextp);
- SvREFCNT_dec(data_fake.last_found);
-
- if ( data_fake.minlen_fixed != minlenp )
- {
- data->offset_fixed= data_fake.offset_fixed;
- data->minlen_fixed= data_fake.minlen_fixed;
- data->lookbehind_fixed+= scan->flags;
- }
- if ( data_fake.minlen_float != minlenp )
- {
- data->minlen_float= data_fake.minlen_float;
- data->offset_float_min=data_fake.offset_float_min;
- data->offset_float_max=data_fake.offset_float_max;
- data->lookbehind_float+= scan->flags;
- }
- }
- }
-
-
- }
-#endif
- }
- else if (OP(scan) == OPEN) {
- if (stopparen != (I32)ARG(scan))
- pars++;
- }
- else if (OP(scan) == CLOSE) {
- if (stopparen == (I32)ARG(scan)) {
- break;
- }
- if ((I32)ARG(scan) == is_par) {
- next = regnext(scan);
-
- if ( next && (OP(next) != WHILEM) && next < last)
- is_par = 0; /* Disable optimization */
- }
- if (data)
- *(data->last_closep) = ARG(scan);
- }
- else if (OP(scan) == EVAL) {
- if (data)
- data->flags |= SF_HAS_EVAL;
- }
- else if ( PL_regkind[OP(scan)] == ENDLIKE ) {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- flags &= ~SCF_DO_SUBSTR;
- }
- if (data && OP(scan)==ACCEPT) {
- data->flags |= SCF_SEEN_ACCEPT;
- if (stopmin > min)
- stopmin = min;
- }
- }
- else if (OP(scan) == LOGICAL && scan->flags == 2) /* Embedded follows */
- {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- else if (OP(scan) == GPOS) {
- if (!(RExC_rx->extflags & RXf_GPOS_FLOAT) &&
- !(delta || is_inf || (data && data->pos_delta)))
- {
- if (!(RExC_rx->extflags & RXf_ANCH) && (flags & SCF_DO_SUBSTR))
- RExC_rx->extflags |= RXf_ANCH_GPOS;
- if (RExC_rx->gofs < (U32)min)
- RExC_rx->gofs = min;
- } else {
- RExC_rx->extflags |= RXf_GPOS_FLOAT;
- RExC_rx->gofs = 0;
- }
- }
-#ifdef TRIE_STUDY_OPT
-#ifdef FULL_TRIE_STUDY
- else if (PL_regkind[OP(scan)] == TRIE) {
- /* NOTE - There is similar code to this block above for handling
- BRANCH nodes on the initial study. If you change stuff here
- check there too. */
- regnode *trie_node= scan;
- regnode *tail= regnext(scan);
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- I32 max1 = 0, min1 = I32_MAX;
- struct regnode_charclass_class accum;
-
- if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */
- SCAN_COMMIT(pRExC_state, data,minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- if (!trie->jump) {
- min1= trie->minlen;
- max1= trie->maxlen;
- } else {
- const regnode *nextbranch= NULL;
- U32 word;
-
- for ( word=1 ; word <= trie->wordcount ; word++)
- {
- I32 deltanext=0, minnext=0, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- if (trie->jump[word]) {
- if (!nextbranch)
- nextbranch = trie_node + trie->jump[0];
- scan= trie_node + trie->jump[word];
- /* We go from the jump point to the branch that follows
- it. Note this means we need the vestigal unused branches
- even though they arent otherwise used.
- */
- minnext = study_chunk(pRExC_state, &scan, minlenp,
- &deltanext, (regnode *)nextbranch, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode*)nextbranch);
-
- if (min1 > (I32)(minnext + trie->minlen))
- min1 = minnext + trie->minlen;
- if (max1 < (I32)(minnext + deltanext + trie->maxlen))
- max1 = minnext + deltanext + trie->maxlen;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
-
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > min + min1)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- }
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- scan= tail;
- continue;
- }
-#else
- else if (PL_regkind[OP(scan)] == TRIE) {
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- U8*bang=NULL;
-
- min += trie->minlen;
- delta += (trie->maxlen - trie->minlen);
- flags &= ~SCF_DO_STCLASS; /* xxx */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += trie->minlen;
- data->pos_delta += (trie->maxlen - trie->minlen);
- if (trie->maxlen != trie->minlen)
- data->longest = &(data->longest_float);
- }
- if (trie->jump) /* no more substrings -- for now /grr*/
- flags &= ~SCF_DO_SUBSTR;
- }
-#endif /* old or new */
-#endif /* TRIE_STUDY_OPT */
-
- /* Else: zero-length, ignore. */
- scan = regnext(scan);
- }
- if (frame) {
- last = frame->last;
- scan = frame->next;
- stopparen = frame->stop;
- frame = frame->prev;
- goto fake_study_recurse;
- }
-
- finish:
- assert(!frame);
- DEBUG_STUDYDATA("pre-fin:",data,depth);
-
- *scanp = scan;
- *deltap = is_inf_internal ? I32_MAX : delta;
- if (flags & SCF_DO_SUBSTR && is_inf)
- data->pos_delta = I32_MAX - data->pos_min;
- if (is_par > (I32)U8_MAX)
- is_par = 0;
- if (is_par && pars==1 && data) {
- data->flags |= SF_IN_PAR;
- data->flags &= ~SF_HAS_PAR;
- }
- else if (pars && data) {
- data->flags |= SF_HAS_PAR;
- data->flags &= ~SF_IN_PAR;
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- if (flags & SCF_TRIE_RESTUDY)
- data->flags |= SCF_TRIE_RESTUDY;
-
- DEBUG_STUDYDATA("post-fin:",data,depth);
-
- return min < stopmin ? min : stopmin;
-}
-
-STATIC U32
-S_add_data(RExC_state_t *pRExC_state, U32 n, const char *s)
-{
- U32 count = RExC_rxi->data ? RExC_rxi->data->count : 0;
-
- PERL_ARGS_ASSERT_ADD_DATA;
-
- Renewc(RExC_rxi->data,
- sizeof(*RExC_rxi->data) + sizeof(void*) * (count + n - 1),
- char, struct reg_data);
- if(count)
- Renew(RExC_rxi->data->what, count + n, U8);
- else
- Newx(RExC_rxi->data->what, n, U8);
- RExC_rxi->data->count = count + n;
- Copy(s, RExC_rxi->data->what + count, n, U8);
- return count;
-}
-
-/*XXX: todo make this not included in a non debugging perl */
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_reginitcolors(pTHX)
-{
- dVAR;
- const char * const s = PerlEnv_getenv("PERL_RE_COLORS");
- if (s) {
- char *t = savepv(s);
- int i = 0;
- PL_colors[0] = t;
- while (++i < 6) {
- t = strchr(t, '\t');
- if (t) {
- *t = '\0';
- PL_colors[i] = ++t;
- }
- else
- PL_colors[i] = t = (char *)"";
- }
- } else {
- int i = 0;
- while (i < 6)
- PL_colors[i++] = (char *)"";
- }
- PL_colorset = 1;
-}
-#endif
-
-
-#ifdef TRIE_STUDY_OPT
-#define CHECK_RESTUDY_GOTO \
- if ( \
- (data.flags & SCF_TRIE_RESTUDY) \
- && ! restudied++ \
- ) goto reStudy
-#else
-#define CHECK_RESTUDY_GOTO
-#endif
-
-/*
- - pregcomp - compile a regular expression into internal code
- *
- * We can't allocate space until we know how big the compiled form will be,
- * but we can't compile it (and thus know how big it is) until we've got a
- * place to put the code. So we cheat: we compile it twice, once with code
- * generation turned off and size counting turned on, and once "for real".
- * This also means that we don't allocate space until we are sure that the
- * thing really will compile successfully, and we never have to move the
- * code and thus invalidate pointers into it. (Note that it has to be in
- * one piece because free() must be able to free it all.) [NB: not true in perl]
- *
- * Beware that the optimization-preparation code in here knows about some
- * of the structure of the compiled regexp. [I'll say.]
- */
-
-
-
-#ifndef PERL_IN_XSUB_RE
-#define RE_ENGINE_PTR &reh_regexp_engine
-#else
-extern const struct regexp_engine my_reg_engine;
-#define RE_ENGINE_PTR &my_reg_engine
-#endif
-
-#ifndef PERL_IN_XSUB_RE
-REGEXP *
-Perl_pregcomp(pTHX_ SV * const pattern, const U32 flags)
-{
- dVAR;
- HV * const table = GvHV(PL_hintgv);
-
- PERL_ARGS_ASSERT_PREGCOMP;
-
- /* Dispatch a request to compile a regexp to correct
- regexp engine. */
- if (table) {
- SV **ptr= hv_fetchs(table, "regcomp", FALSE);
- GET_RE_DEBUG_FLAGS_DECL;
- if (ptr && SvIOK(*ptr) && SvIV(*ptr)) {
- const regexp_engine *eng=INT2PTR(regexp_engine*,SvIV(*ptr));
- DEBUG_COMPILE_r({
- PerlIO_printf(Perl_debug_log, "Using engine %"UVxf"\n",
- SvIV(*ptr));
- });
- return CALLREGCOMP_ENG(eng, pattern, flags);
- }
- }
- return Perl_re_compile(aTHX_ pattern, flags);
-}
-#endif
-
-REGEXP *
-Perl_re_compile(pTHX_ SV * const pattern, U32 pm_flags)
-{
- dVAR;
- REGEXP *rx;
- struct regexp *r;
- register regexp_internal *ri;
- STRLEN plen;
- char *exp = SvPV(pattern, plen);
- char* xend = exp + plen;
- regnode *scan;
- I32 flags;
- I32 minlen = 0;
- I32 sawplus = 0;
- I32 sawopen = 0;
- scan_data_t data;
- RExC_state_t RExC_state;
- RExC_state_t * const pRExC_state = &RExC_state;
-#ifdef TRIE_STUDY_OPT
- int restudied= 0;
- RExC_state_t copyRExC_state;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_COMPILE;
-
- DEBUG_r(if (!PL_colorset) reginitcolors());
-
- RExC_utf8 = RExC_orig_utf8 = SvUTF8(pattern);
-
- DEBUG_COMPILE_r({
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RExC_utf8,
- dsv, exp, plen, 60);
- PerlIO_printf(Perl_debug_log, "%sCompiling REx%s %s\n",
- PL_colors[4],PL_colors[5],s);
- });
-
-redo_first_pass:
- RExC_precomp = exp;
- RExC_flags = pm_flags;
- RExC_sawback = 0;
-
- RExC_seen = 0;
- RExC_seen_zerolen = *exp == '^' ? -1 : 0;
- RExC_seen_evals = 0;
- RExC_extralen = 0;
-
- /* First pass: determine size, legality. */
- RExC_parse = exp;
- RExC_start = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_nestroot = 0;
- RExC_size = 0L;
- RExC_emit = &PL_regdummy;
- RExC_whilem_seen = 0;
- RExC_charnames = NULL;
- RExC_open_parens = NULL;
- RExC_close_parens = NULL;
- RExC_opend = NULL;
- RExC_paren_names = NULL;
-#ifdef DEBUGGING
- RExC_paren_name_list = NULL;
-#endif
- RExC_recurse = NULL;
- RExC_recurse_count = 0;
-
-#if 0 /* REGC() is (currently) a NOP at the first pass.
- * Clever compilers notice this and complain. --jhi */
- REGC((U8)REG_MAGIC, (char*)RExC_emit);
-#endif
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n"));
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- RExC_precomp = NULL;
- return(NULL);
- }
- if (RExC_utf8 && !RExC_orig_utf8) {
- /* It's possible to write a regexp in ascii that represents Unicode
- codepoints outside of the byte range, such as via \x{100}. If we
- detect such a sequence we have to convert the entire pattern to utf8
- and then recompile, as our sizing calculation will have been based
- on 1 byte == 1 character, but we will need to use utf8 to encode
- at least some part of the pattern, and therefore must convert the whole
- thing.
- XXX: somehow figure out how to make this less expensive...
- -- dmq */
- STRLEN len = plen;
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log,
- "UTF8 mismatch! Converting to utf8 for resizing and compile\n"));
- exp = (char*)Perl_bytes_to_utf8(aTHX_ (U8*)exp, &len);
- xend = exp + len;
- RExC_orig_utf8 = RExC_utf8;
- SAVEFREEPV(exp);
- goto redo_first_pass;
- }
- DEBUG_PARSE_r({
- PerlIO_printf(Perl_debug_log,
- "Required size %"IVdf" nodes\n"
- "Starting second pass (creation)\n",
- (IV)RExC_size);
- RExC_lastnum=0;
- RExC_lastparse=NULL;
- });
- /* Small enough for pointer-storage convention?
- If extralen==0, this means that we will not need long jumps. */
- if (RExC_size >= 0x10000L && RExC_extralen)
- RExC_size += RExC_extralen;
- else
- RExC_extralen = 0;
- if (RExC_whilem_seen > 15)
- RExC_whilem_seen = 15;
-
- /* Allocate space and zero-initialize. Note, the two step process
- of zeroing when in debug mode, thus anything assigned has to
- happen after that */
- rx = (REGEXP*) newSV_type(SVt_REGEXP);
- r = (struct regexp*)SvANY(rx);
- Newxc(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode),
- char, regexp_internal);
- if ( r == NULL || ri == NULL )
- FAIL("Regexp out of space");
-#ifdef DEBUGGING
- /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */
- Zero(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode), char);
-#else
- /* bulk initialize base fields with 0. */
- Zero(ri, sizeof(regexp_internal), char);
-#endif
-
- /* non-zero initialization begins here */
- RXi_SET( r, ri );
- r->engine= RE_ENGINE_PTR;
- r->extflags = pm_flags;
- {
- bool has_p = ((r->extflags & RXf_PMf_KEEPCOPY) == RXf_PMf_KEEPCOPY);
- bool has_minus = ((r->extflags & RXf_PMf_STD_PMMOD) != RXf_PMf_STD_PMMOD);
- bool has_runon = ((RExC_seen & REG_SEEN_RUN_ON_COMMENT)==REG_SEEN_RUN_ON_COMMENT);
- U16 reganch = (U16)((r->extflags & RXf_PMf_STD_PMMOD)
- >> RXf_PMf_STD_PMMOD_SHIFT);
- const char *fptr = STD_PAT_MODS; /*"msix"*/
- char *p;
- const STRLEN wraplen = plen + has_minus + has_p + has_runon
- + (sizeof(STD_PAT_MODS) - 1)
- + (sizeof("(?:)") - 1);
-
- p = sv_grow(MUTABLE_SV(rx), wraplen + 1);
- SvCUR_set(rx, wraplen);
- SvPOK_on(rx);
- SvFLAGS(rx) |= SvUTF8(pattern);
- *p++='('; *p++='?';
- if (has_p)
- *p++ = KEEPCOPY_PAT_MOD; /*'p'*/
- {
- char *r = p + (sizeof(STD_PAT_MODS) - 1) + has_minus - 1;
- char *colon = r + 1;
- char ch;
-
- while((ch = *fptr++)) {
- if(reganch & 1)
- *p++ = ch;
- else
- *r-- = ch;
- reganch >>= 1;
- }
- if(has_minus) {
- *r = '-';
- p = colon;
- }
- }
-
- *p++ = ':';
- Copy(RExC_precomp, p, plen, char);
- assert ((RX_WRAPPED(rx) - p) < 16);
- r->pre_prefix = p - RX_WRAPPED(rx);
- p += plen;
- if (has_runon)
- *p++ = '\n';
- *p++ = ')';
- *p = 0;
- }
-
- r->intflags = 0;
- r->nparens = RExC_npar - 1; /* set early to validate backrefs */
-
- if (RExC_seen & REG_SEEN_RECURSE) {
- Newxz(RExC_open_parens, RExC_npar,regnode *);
- SAVEFREEPV(RExC_open_parens);
- Newxz(RExC_close_parens,RExC_npar,regnode *);
- SAVEFREEPV(RExC_close_parens);
- }
-
- /* Useful during FAIL. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- Newxz(ri->u.offsets, 2*RExC_size+1, U32); /* MJD 20001228 */
- DEBUG_OFFSETS_r(PerlIO_printf(Perl_debug_log,
- "%s %"UVuf" bytes for offset annotations.\n",
- ri->u.offsets ? "Got" : "Couldn't get",
- (UV)((2*RExC_size+1) * sizeof(U32))));
-#endif
- SetProgLen(ri,RExC_size);
- RExC_rx_sv = rx;
- RExC_rx = r;
- RExC_rxi = ri;
- REH_CALL_COMP_BEGIN_HOOK(pRExC_state->rx);
-
- /* Second pass: emit code. */
- RExC_flags = pm_flags; /* don't let top level (?i) bleed */
- RExC_parse = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_emit_start = ri->program;
- RExC_emit = ri->program;
- RExC_emit_bound = ri->program + RExC_size + 1;
-
- /* Store the count of eval-groups for security checks: */
- RExC_rx->seen_evals = RExC_seen_evals;
- REGC((U8)REG_MAGIC, (char*) RExC_emit++);
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- ReREFCNT_dec(rx);
- return(NULL);
- }
- /* XXXX To minimize changes to RE engine we always allocate
- 3-units-long substrs field. */
- Newx(r->substrs, 1, struct reg_substr_data);
- if (RExC_recurse_count) {
- Newxz(RExC_recurse,RExC_recurse_count,regnode *);
- SAVEFREEPV(RExC_recurse);
- }
-
-reStudy:
- r->minlen = minlen = sawplus = sawopen = 0;
- Zero(r->substrs, 1, struct reg_substr_data);
-
-#ifdef TRIE_STUDY_OPT
- if (!restudied) {
- StructCopy(&zero_scan_data, &data, scan_data_t);
- copyRExC_state = RExC_state;
- } else {
- U32 seen=RExC_seen;
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log,"Restudying\n"));
-
- RExC_state = copyRExC_state;
- if (seen & REG_TOP_LEVEL_BRANCHES)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
- else
- RExC_seen &= ~REG_TOP_LEVEL_BRANCHES;
- if (data.last_found) {
- SvREFCNT_dec(data.longest_fixed);
- SvREFCNT_dec(data.longest_float);
- SvREFCNT_dec(data.last_found);
- }
- StructCopy(&zero_scan_data, &data, scan_data_t);
- }
-#else
- StructCopy(&zero_scan_data, &data, scan_data_t);
-#endif
-
- /* Dig out information for optimizations. */
- r->extflags = RExC_flags; /* was pm_op */
- /*dmq: removed as part of de-PMOP: pm->op_pmflags = RExC_flags; */
-
- if (UTF)
- SvUTF8_on(rx); /* Unicode in it? */
- ri->regstclass = NULL;
- if (RExC_naughty >= 10) /* Probably an expensive pattern. */
- r->intflags |= PREGf_NAUGHTY;
- scan = ri->program + 1; /* First BRANCH. */
-
- /* testing for BRANCH here tells us whether there is "must appear"
- data in the pattern. If there is then we can use it for optimisations */
- if (!(RExC_seen & REG_TOP_LEVEL_BRANCHES)) { /* Only one top-level choice. */
- I32 fake;
- STRLEN longest_float_length, longest_fixed_length;
- struct regnode_charclass_class ch_class; /* pointed to by data */
- int stclass_flag;
- I32 last_close = 0; /* pointed to by data */
- regnode *first= scan;
- regnode *first_next= regnext(first);
-
- /*
- * Skip introductions and multiplicators >= 1
- * so that we can extract the 'meat' of the pattern that must
- * match in the large if() sequence following.
- * NOTE that EXACT is NOT covered here, as it is normally
- * picked up by the optimiser separately.
- *
- * This is unfortunate as the optimiser isnt handling lookahead
- * properly currently.
- *
- */
- while ((OP(first) == OPEN && (sawopen = 1)) ||
- /* An OR of *one* alternative - should not happen now. */
- (OP(first) == BRANCH && OP(first_next) != BRANCH) ||
- /* for now we can't handle lookbehind IFMATCH*/
- (OP(first) == IFMATCH && !first->flags) ||
- (OP(first) == PLUS) ||
- (OP(first) == MINMOD) ||
- /* An {n,m} with n>0 */
- (PL_regkind[OP(first)] == CURLY && ARG1(first) > 0) ||
- (OP(first) == NOTHING && PL_regkind[OP(first_next)] != END ))
- {
- /*
- * the only op that could be a regnode is PLUS, all the rest
- * will be regnode_1 or regnode_2.
- *
- */
- if (OP(first) == PLUS)
- sawplus = 1;
- else
- first += regarglen[OP(first)];
-
- first = NEXTOPER(first);
- first_next= regnext(first);
- }
-
- /* Starting-point info. */
- again:
- DEBUG_PEEP("first:",first,0);
- /* Ignore EXACT as we deal with it later. */
- if (PL_regkind[OP(first)] == EXACT) {
- if (OP(first) == EXACT)
- NOOP; /* Empty, get anchored substr later. */
- else if ((OP(first) == EXACTF || OP(first) == EXACTFL))
- ri->regstclass = first;
- }
-#ifdef TRIE_STCLASS
- else if (PL_regkind[OP(first)] == TRIE &&
- ((reg_trie_data *)ri->data->data[ ARG(first) ])->minlen>0)
- {
- regnode *trie_op;
- /* this can happen only on restudy */
- if ( OP(first) == TRIE ) {
- struct regnode_1 *trieop = (struct regnode_1 *)
- PerlMemShared_calloc(1, sizeof(struct regnode_1));
- StructCopy(first,trieop,struct regnode_1);
- trie_op=(regnode *)trieop;
- } else {
- struct regnode_charclass *trieop = (struct regnode_charclass *)
- PerlMemShared_calloc(1, sizeof(struct regnode_charclass));
- StructCopy(first,trieop,struct regnode_charclass);
- trie_op=(regnode *)trieop;
- }
- OP(trie_op)+=2;
- make_trie_failtable(pRExC_state, (regnode *)first, trie_op, 0);
- ri->regstclass = trie_op;
- }
-#endif
- else if (strchr((const char*)PL_simple,OP(first)))
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOUND ||
- PL_regkind[OP(first)] == NBOUND)
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOL) {
- r->extflags |= (OP(first) == MBOL
- ? RXf_ANCH_MBOL
- : (OP(first) == SBOL
- ? RXf_ANCH_SBOL
- : RXf_ANCH_BOL));
- first = NEXTOPER(first);
- goto again;
- }
- else if (OP(first) == GPOS) {
- r->extflags |= RXf_ANCH_GPOS;
- first = NEXTOPER(first);
- goto again;
- }
- else if ((!sawopen || !RExC_sawback) &&
- (OP(first) == STAR &&
- PL_regkind[OP(NEXTOPER(first))] == REG_ANY) &&
- !(r->extflags & RXf_ANCH) && !(RExC_seen & REG_SEEN_EVAL))
- {
- /* turn .* into ^.* with an implied $*=1 */
- const int type =
- (OP(NEXTOPER(first)) == REG_ANY)
- ? RXf_ANCH_MBOL
- : RXf_ANCH_SBOL;
- r->extflags |= type;
- r->intflags |= PREGf_IMPLICIT;
- first = NEXTOPER(first);
- goto again;
- }
- if (sawplus && (!sawopen || !RExC_sawback)
- && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */
- /* x+ must match at the 1st pos of run of x's */
- r->intflags |= PREGf_SKIP;
-
- /* Scan is after the zeroth branch, first is atomic matcher. */
-#ifdef TRIE_STUDY_OPT
- DEBUG_PARSE_r(
- if (!restudied)
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#else
- DEBUG_PARSE_r(
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#endif
-
-
- /*
- * If there's something expensive in the r.e., find the
- * longest literal string that must appear and make it the
- * regmust. Resolve ties in favor of later strings, since
- * the regstart check works with the beginning of the r.e.
- * and avoiding duplication strengthens checking. Not a
- * strong reason, but sufficient in the absence of others.
- * [Now we resolve ties in favor of the earlier string if
- * it happens that c_offset_min has been invalidated, since the
- * earlier string may buy us something the later one won't.]
- */
-
- data.longest_fixed = newSVpvs("");
- data.longest_float = newSVpvs("");
- data.last_found = newSVpvs("");
- data.longest = &(data.longest_fixed);
- first = scan;
- if (!ri->regstclass) {
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- stclass_flag = SCF_DO_STCLASS_AND;
- } else /* XXXX Check for BOUND? */
- stclass_flag = 0;
- data.last_closep = &last_close;
-
- minlen = study_chunk(pRExC_state, &first, &minlen, &fake, scan + RExC_size, /* Up to end */
- &data, -1, NULL, NULL,
- SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag,0);
-
-
- CHECK_RESTUDY_GOTO;
-
-
- if ( RExC_npar == 1 && data.longest == &(data.longest_fixed)
- && data.last_start_min == 0 && data.last_end > 0
- && !RExC_seen_zerolen
- && !(RExC_seen & REG_SEEN_VERBARG)
- && (!(RExC_seen & REG_SEEN_GPOS) || (r->extflags & RXf_ANCH_GPOS)))
- r->extflags |= RXf_CHECK_ALL;
- scan_commit(pRExC_state, &data,&minlen,0);
- SvREFCNT_dec(data.last_found);
-
- /* Note that code very similar to this but for anchored string
- follows immediately below, changes may need to be made to both.
- Be careful.
- */
- longest_float_length = CHR_SVLEN(data.longest_float);
- if (longest_float_length
- || (data.flags & SF_FL_BEFORE_EOL
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */
- && data.offset_fixed == data.offset_float_min
- && SvCUR(data.longest_fixed) == SvCUR(data.longest_float))
- goto remove_float; /* As in (a)+. */
-
- /* copy the information about the longest float from the reg_scan_data
- over to the program. */
- if (SvUTF8(data.longest_float)) {
- r->float_utf8 = data.longest_float;
- r->float_substr = NULL;
- } else {
- r->float_substr = data.longest_float;
- r->float_utf8 = NULL;
- }
- /* float_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_float ? *(data.minlen_float)
- : (I32)longest_float_length;
- r->float_end_shift = ml - data.offset_float_min
- - longest_float_length + (SvTAIL(data.longest_float) != 0)
- + data.lookbehind_float;
- r->float_min_offset = data.offset_float_min - data.lookbehind_float;
- r->float_max_offset = data.offset_float_max;
- if (data.offset_float_max < I32_MAX) /* Don't offset infinity */
- r->float_max_offset -= data.lookbehind_float;
-
- t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_float, t ? FBMcf_TAIL : 0);
- }
- else {
- remove_float:
- r->float_substr = r->float_utf8 = NULL;
- SvREFCNT_dec(data.longest_float);
- longest_float_length = 0;
- }
-
- /* Note that code very similar to this but for floating string
- is immediately above, changes may need to be made to both.
- Be careful.
- */
- longest_fixed_length = CHR_SVLEN(data.longest_fixed);
- if (longest_fixed_length
- || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- /* copy the information about the longest fixed
- from the reg_scan_data over to the program. */
- if (SvUTF8(data.longest_fixed)) {
- r->anchored_utf8 = data.longest_fixed;
- r->anchored_substr = NULL;
- } else {
- r->anchored_substr = data.longest_fixed;
- r->anchored_utf8 = NULL;
- }
- /* fixed_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_fixed ? *(data.minlen_fixed)
- : (I32)longest_fixed_length;
- r->anchored_end_shift = ml - data.offset_fixed
- - longest_fixed_length + (SvTAIL(data.longest_fixed) != 0)
- + data.lookbehind_fixed;
- r->anchored_offset = data.offset_fixed - data.lookbehind_fixed;
-
- t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_fixed, t ? FBMcf_TAIL : 0);
- }
- else {
- r->anchored_substr = r->anchored_utf8 = NULL;
- SvREFCNT_dec(data.longest_fixed);
- longest_fixed_length = 0;
- }
- if (ri->regstclass
- && (OP(ri->regstclass) == REG_ANY || OP(ri->regstclass) == SANY))
- ri->regstclass = NULL;
- if ((!(r->anchored_substr || r->anchored_utf8) || r->anchored_offset)
- && stclass_flag
- && !(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV *sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
-
- /* A temporary algorithm prefers floated substr to fixed one to dig more info. */
- if (longest_fixed_length > longest_float_length) {
- r->check_end_shift = r->anchored_end_shift;
- r->check_substr = r->anchored_substr;
- r->check_utf8 = r->anchored_utf8;
- r->check_offset_min = r->check_offset_max = r->anchored_offset;
- if (r->extflags & RXf_ANCH_SINGLE)
- r->extflags |= RXf_NOSCAN;
- }
- else {
- r->check_end_shift = r->float_end_shift;
- r->check_substr = r->float_substr;
- r->check_utf8 = r->float_utf8;
- r->check_offset_min = r->float_min_offset;
- r->check_offset_max = r->float_max_offset;
- }
- /* XXXX Currently intuiting is not compatible with ANCH_GPOS.
- This should be changed ASAP! */
- if ((r->check_substr || r->check_utf8) && !(r->extflags & RXf_ANCH_GPOS)) {
- r->extflags |= RXf_USE_INTUIT;
- if (SvTAIL(r->check_substr ? r->check_substr : r->check_utf8))
- r->extflags |= RXf_INTUIT_TAIL;
- }
- /* XXX Unneeded? dmq (shouldn't as this is handled elsewhere)
- if ( (STRLEN)minlen < longest_float_length )
- minlen= longest_float_length;
- if ( (STRLEN)minlen < longest_fixed_length )
- minlen= longest_fixed_length;
- */
- }
- else {
- /* Several toplevels. Best we can is to set minlen. */
- I32 fake;
- struct regnode_charclass_class ch_class;
- I32 last_close = 0;
-
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "\nMulti Top Level\n"));
-
- scan = ri->program + 1;
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- data.last_closep = &last_close;
-
-
- minlen = study_chunk(pRExC_state, &scan, &minlen, &fake, scan + RExC_size,
- &data, -1, NULL, NULL, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS,0);
-
- CHECK_RESTUDY_GOTO;
-
- r->check_substr = r->check_utf8 = r->anchored_substr = r->anchored_utf8
- = r->float_substr = r->float_utf8 = NULL;
- if (!(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV* sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
- }
-
- /* Guard against an embedded (?=) or (?<=) with a longer minlen than
- the "real" pattern. */
- DEBUG_OPTIMISE_r({
- PerlIO_printf(Perl_debug_log,"minlen: %"IVdf" r->minlen:%"IVdf"\n",
- (IV)minlen, (IV)r->minlen);
- });
- r->minlenret = minlen;
- if (r->minlen < minlen)
- r->minlen = minlen;
-
- if (RExC_seen & REG_SEEN_GPOS)
- r->extflags |= RXf_GPOS_SEEN;
- if (RExC_seen & REG_SEEN_LOOKBEHIND)
- r->extflags |= RXf_LOOKBEHIND_SEEN;
- if (RExC_seen & REG_SEEN_EVAL)
- r->extflags |= RXf_EVAL_SEEN;
- if (RExC_seen & REG_SEEN_CANY)
- r->extflags |= RXf_CANY_SEEN;
- if (RExC_seen & REG_SEEN_VERBARG)
- r->intflags |= PREGf_VERBARG_SEEN;
- if (RExC_seen & REG_SEEN_CUTGROUP)
- r->intflags |= PREGf_CUTGROUP_SEEN;
- if (RExC_paren_names)
- RXp_PAREN_NAMES(r) = MUTABLE_HV(SvREFCNT_inc(RExC_paren_names));
- else
- RXp_PAREN_NAMES(r) = NULL;
-
-#ifdef STUPID_PATTERN_CHECKS
- if (RX_PRELEN(rx) == 0)
- r->extflags |= RXf_NULL;
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else if (RX_PRELEN(rx) == 3 && memEQ("\\s+", RX_PRECOMP(rx), 3))
- r->extflags |= RXf_WHITE;
- else if (RX_PRELEN(rx) == 1 && RXp_PRECOMP(rx)[0] == '^')
- r->extflags |= RXf_START_ONLY;
-#else
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else {
- regnode *first = ri->program + 1;
- U8 fop = OP(first);
- U8 nop = OP(NEXTOPER(first));
-
- if (PL_regkind[fop] == NOTHING && nop == END)
- r->extflags |= RXf_NULL;
- else if (PL_regkind[fop] == BOL && nop == END)
- r->extflags |= RXf_START_ONLY;
- else if (fop == PLUS && nop ==SPACE && OP(regnext(first))==END)
- r->extflags |= RXf_WHITE;
- }
-#endif
-#ifdef DEBUGGING
- if (RExC_paren_names) {
- ri->name_list_idx = add_data( pRExC_state, 1, "p" );
- ri->data->data[ri->name_list_idx] = (void*)SvREFCNT_inc(RExC_paren_name_list);
- } else
-#endif
- ri->name_list_idx = 0;
-
- if (RExC_recurse_count) {
- for ( ; RExC_recurse_count ; RExC_recurse_count-- ) {
- const regnode *scan = RExC_recurse[RExC_recurse_count-1];
- ARG2L_SET( scan, RExC_open_parens[ARG(scan)-1] - scan );
- }
- }
- Newxz(r->offs, RExC_npar, regexp_paren_pair);
- /* assume we don't need to swap parens around before we match */
-
- DEBUG_DUMP_r({
- PerlIO_printf(Perl_debug_log,"Final program:\n");
- regdump(r);
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_OFFSETS_r(if (ri->u.offsets) {
- const U32 len = ri->u.offsets[0];
- U32 i;
- GET_RE_DEBUG_FLAGS_DECL;
- PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)ri->u.offsets[0]);
- for (i = 1; i <= len; i++) {
- if (ri->u.offsets[i*2-1] || ri->u.offsets[i*2])
- PerlIO_printf(Perl_debug_log, "%"UVuf":%"UVuf"[%"UVuf"] ",
- (UV)i, (UV)ri->u.offsets[i*2-1], (UV)ri->u.offsets[i*2]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
-#endif
- return rx;
-}
-
-#undef RE_ENGINE_PTR
-
-
-SV*
-Perl_reg_named_buff(pTHX_ REGEXP * const rx, SV * const key, SV * const value,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF;
-
- PERL_UNUSED_ARG(value);
-
- if (flags & RXapif_FETCH) {
- return reg_named_buff_fetch(rx, key, flags);
- } else if (flags & (RXapif_STORE | RXapif_DELETE | RXapif_CLEAR)) {
- Perl_croak(aTHX_ "%s", PL_no_modify);
- return NULL;
- } else if (flags & RXapif_EXISTS) {
- return reg_named_buff_exists(rx, key, flags)
- ? &PL_sv_yes
- : &PL_sv_no;
- } else if (flags & RXapif_REGNAMES) {
- return reg_named_buff_all(rx, flags);
- } else if (flags & (RXapif_SCALAR | RXapif_REGNAMES_COUNT)) {
- return reg_named_buff_scalar(rx, flags);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_iter(pTHX_ REGEXP * const rx, const SV * const lastkey,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ITER;
- PERL_UNUSED_ARG(lastkey);
-
- if (flags & RXapif_FIRSTKEY)
- return reg_named_buff_firstkey(rx, flags);
- else if (flags & RXapif_NEXTKEY)
- return reg_named_buff_nextkey(rx, flags);
- else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_iter", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_fetch(pTHX_ REGEXP * const r, SV * const namesv,
- const U32 flags)
-{
- AV *retarray = NULL;
- SV *ret;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FETCH;
-
- if (flags & RXapif_ALL)
- retarray=newAV();
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HE *he_str = hv_fetch_ent( RXp_PAREN_NAMES(rx), namesv, 0, 0 );
- if (he_str) {
- IV i;
- SV* sv_dat=HeVAL(he_str);
- I32 *nums=(I32*)SvPVX(sv_dat);
- for ( i=0; i<SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->nparens) >= nums[i]
- && rx->offs[nums[i]].start != -1
- && rx->offs[nums[i]].end != -1)
- {
- ret = newSVpvs("");
- CALLREG_NUMBUF_FETCH(r,nums[i],ret);
- if (!retarray)
- return ret;
- } else {
- ret = newSVsv(&PL_sv_undef);
- }
- if (retarray)
- av_push(retarray, ret);
- }
- if (retarray)
- return newRV_noinc(MUTABLE_SV(retarray));
- }
- }
- return NULL;
-}
-
-bool
-Perl_reg_named_buff_exists(pTHX_ REGEXP * const r, SV * const key,
- const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_EXISTS;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & RXapif_ALL) {
- return hv_exists_ent(RXp_PAREN_NAMES(rx), key, 0);
- } else {
- SV *sv = CALLREG_NAMED_BUFF_FETCH(r, key, flags);
- if (sv) {
- SvREFCNT_dec(sv);
- return TRUE;
- } else {
- return FALSE;
- }
- }
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_firstkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FIRSTKEY;
-
- if ( rx && RXp_PAREN_NAMES(rx) ) {
- (void)hv_iterinit(RXp_PAREN_NAMES(rx));
-
- return CALLREG_NAMED_BUFF_NEXTKEY(r, NULL, flags & ~RXapif_FIRSTKEY);
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_nextkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_NEXTKEY;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv = RXp_PAREN_NAMES(rx);
- HE *temphe;
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- return newSVhek(HeKEY_hek(temphe));
- }
- }
- }
- return NULL;
-}
-
-SV*
-Perl_reg_named_buff_scalar(pTHX_ REGEXP * const r, const U32 flags)
-{
- SV *ret;
- AV *av;
- I32 length;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_SCALAR;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & (RXapif_ALL | RXapif_REGNAMES_COUNT)) {
- return newSViv(HvTOTALKEYS(RXp_PAREN_NAMES(rx)));
- } else if (flags & RXapif_ONE) {
- ret = CALLREG_NAMED_BUFF_ALL(r, (flags | RXapif_REGNAMES));
- av = MUTABLE_AV(SvRV(ret));
- length = av_len(av);
- SvREFCNT_dec(ret);
- return newSViv(length + 1);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_scalar", (int)flags);
- return NULL;
- }
- }
- return &PL_sv_undef;
-}
-
-SV*
-Perl_reg_named_buff_all(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- AV *av = newAV();
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ALL;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv= RXp_PAREN_NAMES(rx);
- HE *temphe;
- (void)hv_iterinit(hv);
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- av_push(av, newSVhek(HeKEY_hek(temphe)));
- }
- }
- }
-
- return newRV_noinc(MUTABLE_SV(av));
-}
-
-void
-Perl_reg_numbered_buff_fetch(pTHX_ REGEXP * const r, const I32 paren,
- SV * const sv)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- char *s = NULL;
- I32 i = 0;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_FETCH;
-
- if (!rx->subbeg) {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- else
- if (paren == RX_BUFF_IDX_PREMATCH && rx->offs[0].start != -1) {
- /* $` */
- i = rx->offs[0].start;
- s = rx->subbeg;
- }
- else
- if (paren == RX_BUFF_IDX_POSTMATCH && rx->offs[0].end != -1) {
- /* $' */
- s = rx->subbeg + rx->offs[0].end;
- i = rx->sublen - rx->offs[0].end;
- }
- else
- if ( 0 <= paren && paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- /* $& $1 ... */
- i = t1 - s1;
- s = rx->subbeg + s1;
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- assert(rx->sublen >= (s - rx->subbeg) + i );
- if (i >= 0) {
- const int oldtainted = PL_tainted;
- TAINT_NOT;
- sv_setpvn(sv, s, i);
- PL_tainted = oldtainted;
- if ( (rx->extflags & RXf_CANY_SEEN)
- ? (RXp_MATCH_UTF8(rx)
- && (!i || is_utf8_string((U8*)s, i)))
- : (RXp_MATCH_UTF8(rx)) )
- {
- SvUTF8_on(sv);
- }
- else
- SvUTF8_off(sv);
- if (PL_tainting) {
- if (RXp_MATCH_TAINTED(rx)) {
- if (SvTYPE(sv) >= SVt_PVMG) {
- MAGIC* const mg = SvMAGIC(sv);
- MAGIC* mgt;
- PL_tainted = 1;
- SvMAGIC_set(sv, mg->mg_moremagic);
- SvTAINT(sv);
- if ((mgt = SvMAGIC(sv))) {
- mg->mg_moremagic = mgt;
- SvMAGIC_set(sv, mg);
- }
- } else {
- PL_tainted = 1;
- SvTAINT(sv);
- }
- } else
- SvTAINTED_off(sv);
- }
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
-}
-
-void
-Perl_reg_numbered_buff_store(pTHX_ REGEXP * const rx, const I32 paren,
- SV const * const value)
-{
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_STORE;
-
- PERL_UNUSED_ARG(rx);
- PERL_UNUSED_ARG(paren);
- PERL_UNUSED_ARG(value);
-
- if (!PL_localizing)
- Perl_croak(aTHX_ "%s", PL_no_modify);
-}
-
-I32
-Perl_reg_numbered_buff_length(pTHX_ REGEXP * const r, const SV * const sv,
- const I32 paren)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- I32 i;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_LENGTH;
-
- /* Some of this code was originally in C<Perl_magic_len> in F<mg.c> */
- switch (paren) {
- /* $` / ${^PREMATCH} */
- case RX_BUFF_IDX_PREMATCH:
- if (rx->offs[0].start != -1) {
- i = rx->offs[0].start;
- if (i > 0) {
- s1 = 0;
- t1 = i;
- goto getlen;
- }
- }
- return 0;
- /* $' / ${^POSTMATCH} */
- case RX_BUFF_IDX_POSTMATCH:
- if (rx->offs[0].end != -1) {
- i = rx->sublen - rx->offs[0].end;
- if (i > 0) {
- s1 = rx->offs[0].end;
- t1 = rx->sublen;
- goto getlen;
- }
- }
- return 0;
- /* $& / ${^MATCH}, $1, $2, ... */
- default:
- if (paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- i = t1 - s1;
- goto getlen;
- } else {
- if (ckWARN(WARN_UNINITIALIZED))
- report_uninit((const SV *)sv);
- return 0;
- }
- }
- getlen:
- if (i > 0 && RXp_MATCH_UTF8(rx)) {
- const char * const s = rx->subbeg + s1;
- const U8 *ep;
- STRLEN el;
-
- i = t1 - s1;
- if (is_utf8_string_loclen((U8*)s, i, &ep, &el))
- i = el;
- }
- return i;
-}
-
-SV*
-Perl_reg_qr_package(pTHX_ REGEXP * const rx)
-{
- PERL_ARGS_ASSERT_REG_QR_PACKAGE;
- PERL_UNUSED_ARG(rx);
- if (0)
- return NULL;
- else
- return newSVpvs("Regexp");
-}
-
-/* Scans the name of a named buffer from the pattern.
- * If flags is REG_RSN_RETURN_NULL returns null.
- * If flags is REG_RSN_RETURN_NAME returns an SV* containing the name
- * If flags is REG_RSN_RETURN_DATA returns the data SV* corresponding
- * to the parsed name as looked up in the RExC_paren_names hash.
- * If there is an error throws a vFAIL().. type exception.
- */
-
-#define REG_RSN_RETURN_NULL 0
-#define REG_RSN_RETURN_NAME 1
-#define REG_RSN_RETURN_DATA 2
-
-STATIC SV*
-S_reg_scan_name(pTHX_ RExC_state_t *pRExC_state, U32 flags)
-{
- char *name_start = RExC_parse;
-
- PERL_ARGS_ASSERT_REG_SCAN_NAME;
-
- if (isIDFIRST_lazy_if(RExC_parse, UTF)) {
- /* skip IDFIRST by using do...while */
- if (UTF)
- do {
- RExC_parse += UTF8SKIP(RExC_parse);
- } while (isALNUM_utf8((U8*)RExC_parse));
- else
- do {
- RExC_parse++;
- } while (isALNUM(*RExC_parse));
- }
-
- if ( flags ) {
- SV* sv_name
- = newSVpvn_flags(name_start, (int)(RExC_parse - name_start),
- SVs_TEMP | (UTF ? SVf_UTF8 : 0));
- if ( flags == REG_RSN_RETURN_NAME)
- return sv_name;
- else if (flags==REG_RSN_RETURN_DATA) {
- HE *he_str = NULL;
- SV *sv_dat = NULL;
- if ( ! sv_name ) /* should not happen*/
- Perl_croak(aTHX_ "panic: no svname in reg_scan_name");
- if (RExC_paren_names)
- he_str = hv_fetch_ent( RExC_paren_names, sv_name, 0, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat )
- vFAIL("Reference to nonexistent named group");
- return sv_dat;
- }
- else {
- Perl_croak(aTHX_ "panic: bad flag in reg_scan_name");
- }
- /* NOT REACHED */
- }
- return NULL;
-}
-
-#define DEBUG_PARSE_MSG(funcname) DEBUG_PARSE_r({ \
- int rem=(int)(RExC_end - RExC_parse); \
- int cut; \
- int num; \
- int iscut=0; \
- if (rem>10) { \
- rem=10; \
- iscut=1; \
- } \
- cut=10-rem; \
- if (RExC_lastparse!=RExC_parse) \
- PerlIO_printf(Perl_debug_log," >%.*s%-*s", \
- rem, RExC_parse, \
- cut + 4, \
- iscut ? "..." : "<" \
- ); \
- else \
- PerlIO_printf(Perl_debug_log,"%16s",""); \
- \
- if (SIZE_ONLY) \
- num = RExC_size + 1; \
- else \
- num=REG_NODE_NUM(RExC_emit); \
- if (RExC_lastnum!=num) \
- PerlIO_printf(Perl_debug_log,"|%4d",num); \
- else \
- PerlIO_printf(Perl_debug_log,"|%4s",""); \
- PerlIO_printf(Perl_debug_log,"|%*s%-4s", \
- (int)((depth*2)), "", \
- (funcname) \
- ); \
- RExC_lastnum=num; \
- RExC_lastparse=RExC_parse; \
-})
-
-
-
-#define DEBUG_PARSE(funcname) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,"%4s","\n"); \
-})
-#define DEBUG_PARSE_FMT(funcname,fmt,args) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,fmt "\n",args); \
-})
-/*
- - reg - regular expression, i.e. main body or parenthesized thing
- *
- * Caller must absorb opening parenthesis.
- *
- * Combining parenthesis handling with the base level of regular expression
- * is a trifle forced, but the need to tie the tails of the branches to what
- * follows makes it hard to avoid.
- */
-#define REGTAIL(x,y,z) regtail((x),(y),(z),depth+1)
-#ifdef DEBUGGING
-#define REGTAIL_STUDY(x,y,z) regtail_study((x),(y),(z),depth+1)
-#else
-#define REGTAIL_STUDY(x,y,z) regtail((x),(y),(z),depth+1)
-#endif
-
-STATIC regnode *
-S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth)
- /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */
-{
- dVAR;
- register regnode *ret; /* Will be the head of the group. */
- register regnode *br;
- register regnode *lastbr;
- register regnode *ender = NULL;
- register I32 parno = 0;
- I32 flags;
- U32 oregflags = RExC_flags;
- bool have_branch = 0;
- bool is_open = 0;
- I32 freeze_paren = 0;
- I32 after_freeze = 0;
-
- /* for (?g), (?gc), and (?o) warnings; warning
- about (?c) will warn about (?g) -- japhy */
-
-#define WASTED_O 0x01
-#define WASTED_G 0x02
-#define WASTED_C 0x04
-#define WASTED_GC (0x02|0x04)
- I32 wastedflags = 0x00;
-
- char * parse_start = RExC_parse; /* MJD */
- char * const oregcomp_parse = RExC_parse;
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG;
- DEBUG_PARSE("reg ");
-
- *flagp = 0; /* Tentatively. */
-
-
- /* Make an OPEN node, if parenthesized. */
- if (paren) {
- if ( *RExC_parse == '*') { /* (*VERB:ARG) */
- char *start_verb = RExC_parse;
- STRLEN verb_len = 0;
- char *start_arg = NULL;
- unsigned char op = 0;
- int argok = 1;
- int internal_argval = 0; /* internal_argval is only useful if !argok */
- while ( *RExC_parse && *RExC_parse != ')' ) {
- if ( *RExC_parse == ':' ) {
- start_arg = RExC_parse + 1;
- break;
- }
- RExC_parse++;
- }
- ++start_verb;
- verb_len = RExC_parse - start_verb;
- if ( start_arg ) {
- RExC_parse++;
- while ( *RExC_parse && *RExC_parse != ')' )
- RExC_parse++;
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern argument");
- if ( RExC_parse == start_arg )
- start_arg = NULL;
- } else {
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern");
- }
-
- switch ( *start_verb ) {
- case 'A': /* (*ACCEPT) */
- if ( memEQs(start_verb,verb_len,"ACCEPT") ) {
- op = ACCEPT;
- internal_argval = RExC_nestroot;
- }
- break;
- case 'C': /* (*COMMIT) */
- if ( memEQs(start_verb,verb_len,"COMMIT") )
- op = COMMIT;
- break;
- case 'F': /* (*FAIL) */
- if ( verb_len==1 || memEQs(start_verb,verb_len,"FAIL") ) {
- op = OPFAIL;
- argok = 0;
- }
- break;
- case ':': /* (*:NAME) */
- case 'M': /* (*MARK:NAME) */
- if ( verb_len==0 || memEQs(start_verb,verb_len,"MARK") ) {
- op = MARKPOINT;
- argok = -1;
- }
- break;
- case 'P': /* (*PRUNE) */
- if ( memEQs(start_verb,verb_len,"PRUNE") )
- op = PRUNE;
- break;
- case 'S': /* (*SKIP) */
- if ( memEQs(start_verb,verb_len,"SKIP") )
- op = SKIP;
- break;
- case 'T': /* (*THEN) */
- /* [19:06] <TimToady> :: is then */
- if ( memEQs(start_verb,verb_len,"THEN") ) {
- op = CUTGROUP;
- RExC_seen |= REG_SEEN_CUTGROUP;
- }
- break;
- }
- if ( ! op ) {
- RExC_parse++;
- vFAIL3("Unknown verb pattern '%.*s'",
- verb_len, start_verb);
- }
- if ( argok ) {
- if ( start_arg && internal_argval ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else if ( argok < 0 && !start_arg ) {
- vFAIL3("Verb pattern '%.*s' has a mandatory argument",
- verb_len, start_verb);
- } else {
- ret = reganode(pRExC_state, op, internal_argval);
- if ( ! internal_argval && ! SIZE_ONLY ) {
- if (start_arg) {
- SV *sv = newSVpvn( start_arg, RExC_parse - start_arg);
- ARG(ret) = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[ARG(ret)]=(void*)sv;
- ret->flags = 0;
- } else {
- ret->flags = 1;
- }
- }
- }
- if (!internal_argval)
- RExC_seen |= REG_SEEN_VERBARG;
- } else if ( start_arg ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else {
- ret = reg_node(pRExC_state, op);
- }
- nextchar(pRExC_state);
- return ret;
- } else
- if (*RExC_parse == '?') { /* (?...) */
- bool is_logical = 0;
- const char * const seqstart = RExC_parse;
-
- RExC_parse++;
- paren = *RExC_parse++;
- ret = NULL; /* For look-ahead/behind. */
- switch (paren) {
-
- case 'P': /* (?P...) variants for those used to PCRE/Python */
- paren = *RExC_parse++;
- if ( paren == '<') /* (?P<...>) named capture */
- goto named_capture;
- else if (paren == '>') { /* (?P>name) named recursion */
- goto named_recursion;
- }
- else if (paren == '=') { /* (?P=...) named backref */
- /* this pretty much dupes the code for \k<NAME> in regatom(), if
- you change this make sure you change that */
- char* name_start = RExC_parse;
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ')')
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
-
- nextchar(pRExC_state);
- return ret;
- }
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- case '<': /* (?<...) */
- if (*RExC_parse == '!')
- paren = ',';
- else if (*RExC_parse != '=')
- named_capture:
- { /* (?<...>) */
- char *name_start;
- SV *svname;
- paren= '>';
- case '\'': /* (?'...') */
- name_start= RExC_parse;
- svname = reg_scan_name(pRExC_state,
- SIZE_ONLY ? /* reverse test from the others */
- REG_RSN_RETURN_NAME :
- REG_RSN_RETURN_NULL);
- if (RExC_parse == name_start) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- if (*RExC_parse != paren)
- vFAIL2("Sequence (?%c... not terminated",
- paren=='>' ? '<' : paren);
- if (SIZE_ONLY) {
- HE *he_str;
- SV *sv_dat = NULL;
- if (!svname) /* shouldnt happen */
- Perl_croak(aTHX_
- "panic: reg_scan_name returned NULL");
- if (!RExC_paren_names) {
- RExC_paren_names= newHV();
- sv_2mortal(MUTABLE_SV(RExC_paren_names));
-#ifdef DEBUGGING
- RExC_paren_name_list= newAV();
- sv_2mortal(MUTABLE_SV(RExC_paren_name_list));
-#endif
- }
- he_str = hv_fetch_ent( RExC_paren_names, svname, 1, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat ) {
- /* croak baby croak */
- Perl_croak(aTHX_
- "panic: paren_name hash element allocation failed");
- } else if ( SvPOK(sv_dat) ) {
- /* (?|...) can mean we have dupes so scan to check
- its already been stored. Maybe a flag indicating
- we are inside such a construct would be useful,
- but the arrays are likely to be quite small, so
- for now we punt -- dmq */
- IV count = SvIV(sv_dat);
- I32 *pv = (I32*)SvPVX(sv_dat);
- IV i;
- for ( i = 0 ; i < count ; i++ ) {
- if ( pv[i] == RExC_npar ) {
- count = 0;
- break;
- }
- }
- if ( count ) {
- pv = (I32*)SvGROW(sv_dat, SvCUR(sv_dat) + sizeof(I32)+1);
- SvCUR_set(sv_dat, SvCUR(sv_dat) + sizeof(I32));
- pv[count] = RExC_npar;
- SvIV_set(sv_dat, SvIVX(sv_dat) + 1);
- }
- } else {
- (void)SvUPGRADE(sv_dat,SVt_PVNV);
- sv_setpvn(sv_dat, (char *)&(RExC_npar), sizeof(I32));
- SvIOK_on(sv_dat);
- SvIV_set(sv_dat, 1);
- }
-#ifdef DEBUGGING
- if (!av_store(RExC_paren_name_list, RExC_npar, SvREFCNT_inc(svname)))
- SvREFCNT_dec(svname);
-#endif
-
- /*sv_dump(sv_dat);*/
- }
- nextchar(pRExC_state);
- paren = 1;
- goto capturing_parens;
- }
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- RExC_parse++;
- case '=': /* (?=...) */
- RExC_seen_zerolen++;
- break;
- case '!': /* (?!...) */
- RExC_seen_zerolen++;
- if (*RExC_parse == ')') {
- ret=reg_node(pRExC_state, OPFAIL);
- nextchar(pRExC_state);
- return ret;
- }
- break;
- case '|': /* (?|...) */
- /* branch reset, behave like a (?:...) except that
- buffers in alternations share the same numbers */
- paren = ':';
- after_freeze = freeze_paren = RExC_npar;
- break;
- case ':': /* (?:...) */
- case '>': /* (?>...) */
- break;
- case '$': /* (?$...) */
- case '@': /* (?@...) */
- vFAIL2("Sequence (?%c...) not implemented", (int)paren);
- break;
- case '#': /* (?#...) */
- while (*RExC_parse && *RExC_parse != ')')
- RExC_parse++;
- if (*RExC_parse != ')')
- FAIL("Sequence (?#... not terminated");
- nextchar(pRExC_state);
- *flagp = TRYAGAIN;
- return NULL;
- case '0' : /* (?0) */
- case 'R' : /* (?R) */
- if (*RExC_parse != ')')
- FAIL("Sequence (?R) not terminated");
- ret = reg_node(pRExC_state, GOSTART);
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- /*notreached*/
- { /* named and numeric backreferences */
- I32 num;
- case '&': /* (?&NAME) */
- parse_start = RExC_parse - 1;
- named_recursion:
- {
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- num = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- goto gen_recurse_regop;
- /* NOT REACHED */
- case '+':
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse++;
- vFAIL("Illegal pattern");
- }
- goto parse_recursion;
- /* NOT REACHED*/
- case '-': /* (?-1) */
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse--; /* rewind to let it be handled later */
- goto parse_flags;
- }
- /*FALLTHROUGH */
- case '1': case '2': case '3': case '4': /* (?1) */
- case '5': case '6': case '7': case '8': case '9':
- RExC_parse--;
- parse_recursion:
- num = atoi(RExC_parse);
- parse_start = RExC_parse - 1; /* MJD */
- if (*RExC_parse == '-')
- RExC_parse++;
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (*RExC_parse!=')')
- vFAIL("Expecting close bracket");
-
- gen_recurse_regop:
- if ( paren == '-' ) {
- /*
- Diagram of capture buffer numbering.
- Top line is the normal capture buffer numbers
- Botton line is the negative indexing as from
- the X (the (?-2))
-
- + 1 2 3 4 5 X 6 7
- /(a(x)y)(a(b(c(?-2)d)e)f)(g(h))/
- - 5 4 3 2 1 X x x
-
- */
- num = RExC_npar + num;
- if (num < 1) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- } else if ( paren == '+' ) {
- num = RExC_npar + num - 1;
- }
-
- ret = reganode(pRExC_state, GOSUB, num);
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- ARG2L_SET( ret, RExC_recurse_count++);
- RExC_emit++;
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Recurse #%"UVuf" to %"IVdf"\n", (UV)ARG(ret), (IV)ARG2L(ret)));
- } else {
- RExC_size++;
- }
- RExC_seen |= REG_SEEN_RECURSE;
- Set_Node_Length(ret, 1 + regarglen[OP(ret)]); /* MJD */
- Set_Node_Offset(ret, parse_start); /* MJD */
-
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- } /* named and numeric backreferences */
- /* NOT REACHED */
-
- case '?': /* (??...) */
- is_logical = 1;
- if (*RExC_parse != '{') {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- *flagp |= POSTPONED;
- paren = *RExC_parse++;
- /* FALL THROUGH */
- case '{': /* (?{...}) */
- {
- I32 count = 1;
- U32 n = 0;
- char c;
- char *s = RExC_parse;
-
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_EVAL;
- while (count && (c = *RExC_parse)) {
- if (c == '\\') {
- if (RExC_parse[1])
- RExC_parse++;
- }
- else if (c == '{')
- count++;
- else if (c == '}')
- count--;
- RExC_parse++;
- }
- if (*RExC_parse != ')') {
- RExC_parse = s;
- vFAIL("Sequence (?{...}) not terminated or not {}-balanced");
- }
- if (!SIZE_ONLY) {
- PAD *pad;
- OP_4tree *sop, *rop;
- SV * const sv = newSVpvn(s, RExC_parse - 1 - s);
-
- ENTER;
- Perl_save_re_context(aTHX);
- rop = sv_compile_2op(sv, &sop, "re", &pad);
- sop->op_private |= OPpREFCOUNTED;
- /* re_dup will OpREFCNT_inc */
- OpREFCNT_set(sop, 1);
- LEAVE;
-
- n = add_data(pRExC_state, 3, "nop");
- RExC_rxi->data->data[n] = (void*)rop;
- RExC_rxi->data->data[n+1] = (void*)sop;
- RExC_rxi->data->data[n+2] = (void*)pad;
- SvREFCNT_dec(sv);
- }
- else { /* First pass */
- if (PL_reginterp_cnt < ++RExC_seen_evals
- && IN_PERL_RUNTIME)
- /* No compiled RE interpolated, has runtime
- components ===> unsafe. */
- FAIL("Eval-group not allowed at runtime, use re 'eval'");
- if (PL_tainting && PL_tainted)
- FAIL("Eval-group in insecure regular expression");
-#if PERL_VERSION > 8
- if (IN_PERL_COMPILETIME)
- PL_cv_has_eval = 1;
-#endif
- }
-
- nextchar(pRExC_state);
- if (is_logical) {
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 2;
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, EVAL, n));
- /* deal with the length of this later - MJD */
- return ret;
- }
- ret = reganode(pRExC_state, EVAL, n);
- Set_Node_Length(ret, RExC_parse - parse_start + 1);
- Set_Node_Offset(ret, parse_start);
- return ret;
- }
- case '(': /* (?(?{...})...) and (?(?=...)...) */
- {
- int is_define= 0;
- if (RExC_parse[0] == '?') { /* (?(?...)) */
- if (RExC_parse[1] == '=' || RExC_parse[1] == '!'
- || RExC_parse[1] == '<'
- || RExC_parse[1] == '{') { /* Lookahead or eval. */
- I32 flag;
-
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 1;
- REGTAIL(pRExC_state, ret, reg(pRExC_state, 1, &flag,depth+1));
- goto insert_if;
- }
- }
- else if ( RExC_parse[0] == '<' /* (?(<NAME>)...) */
- || RExC_parse[0] == '\'' ) /* (?('NAME')...) */
- {
- char ch = RExC_parse[0] == '<' ? '>' : '\'';
- char *name_start= RExC_parse++;
- U32 num = 0;
- SV *sv_dat=reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence (?(%c... not terminated",
- (ch == '>' ? '<' : ch));
- RExC_parse++;
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- ret = reganode(pRExC_state,NGROUPP,num);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'D' &&
- RExC_parse[1] == 'E' &&
- RExC_parse[2] == 'F' &&
- RExC_parse[3] == 'I' &&
- RExC_parse[4] == 'N' &&
- RExC_parse[5] == 'E')
- {
- ret = reganode(pRExC_state,DEFINEP,0);
- RExC_parse +=6 ;
- is_define = 1;
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'R') {
- RExC_parse++;
- parno = 0;
- if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- parno = atoi(RExC_parse++);
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- } else if (RExC_parse[0] == '&') {
- SV *sv_dat;
- RExC_parse++;
- sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- parno = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- ret = reganode(pRExC_state,INSUBP,parno);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- /* (?(1)...) */
- char c;
- parno = atoi(RExC_parse++);
-
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- ret = reganode(pRExC_state, GROUPP, parno);
-
- insert_if_check_paren:
- if ((c = *nextchar(pRExC_state)) != ')')
- vFAIL("Switch condition not recognized");
- insert_if:
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0));
- br = regbranch(pRExC_state, &flags, 1,depth+1);
- if (br == NULL)
- br = reganode(pRExC_state, LONGJMP, 0);
- else
- REGTAIL(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0));
- c = *nextchar(pRExC_state);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- if (c == '|') {
- if (is_define)
- vFAIL("(?(DEFINE)....) does not allow branches");
- lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */
- regbranch(pRExC_state, &flags, 1,depth+1);
- REGTAIL(pRExC_state, ret, lastbr);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- c = *nextchar(pRExC_state);
- }
- else
- lastbr = NULL;
- if (c != ')')
- vFAIL("Switch (?(condition)... contains too many branches");
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, br, ender);
- if (lastbr) {
- REGTAIL(pRExC_state, lastbr, ender);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender);
- }
- else
- REGTAIL(pRExC_state, ret, ender);
- RExC_size++; /* XXX WHY do we need this?!!
- For large programs it seems to be required
- but I can't figure out why. -- dmq*/
- return ret;
- }
- else {
- vFAIL2("Unknown switch condition (?(%.2s", RExC_parse);
- }
- }
- case 0:
- RExC_parse--; /* for vFAIL to print correctly */
- vFAIL("Sequence (? incomplete");
- break;
- default:
- --RExC_parse;
- parse_flags: /* (?i) */
- {
- U32 posflags = 0, negflags = 0;
- U32 *flagsp = &posflags;
-
- while (*RExC_parse) {
- /* && strchr("iogcmsx", *RExC_parse) */
- /* (?g), (?gc) and (?o) are useless here
- and must be globally applied -- japhy */
- switch (*RExC_parse) {
- CASE_STD_PMMOD_FLAGS_PARSE_SET(flagsp);
- case ONCE_PAT_MOD: /* 'o' */
- case GLOBAL_PAT_MOD: /* 'g' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- const I32 wflagbit = *RExC_parse == 'o' ? WASTED_O : WASTED_G;
- if (! (wastedflags & wflagbit) ) {
- wastedflags |= wflagbit;
- vWARN5(
- RExC_parse + 1,
- "Useless (%s%c) - %suse /%c modifier",
- flagsp == &negflags ? "?-" : "?",
- *RExC_parse,
- flagsp == &negflags ? "don't " : "",
- *RExC_parse
- );
- }
- }
- break;
-
- case CONTINUE_PAT_MOD: /* 'c' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- if (! (wastedflags & WASTED_C) ) {
- wastedflags |= WASTED_GC;
- vWARN3(
- RExC_parse + 1,
- "Useless (%sc) - %suse /gc modifier",
- flagsp == &negflags ? "?-" : "?",
- flagsp == &negflags ? "don't " : ""
- );
- }
- }
- break;
- case KEEPCOPY_PAT_MOD: /* 'p' */
- if (flagsp == &negflags) {
- if (SIZE_ONLY)
- ckWARNreg(RExC_parse + 1,"Useless use of (?-p)");
- } else {
- *flagsp |= RXf_PMf_KEEPCOPY;
- }
- break;
- case '-':
- if (flagsp == &negflags) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- flagsp = &negflags;
- wastedflags = 0; /* reset so (?g-c) warns twice */
- break;
- case ':':
- paren = ':';
- /*FALLTHROUGH*/
- case ')':
- RExC_flags |= posflags;
- RExC_flags &= ~negflags;
- if (paren != ':') {
- oregflags |= posflags;
- oregflags &= ~negflags;
- }
- nextchar(pRExC_state);
- if (paren != ':') {
- *flagp = TRYAGAIN;
- return NULL;
- } else {
- ret = NULL;
- goto parse_rest;
- }
- /*NOTREACHED*/
- default:
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- ++RExC_parse;
- }
- }} /* one for the default block, one for the switch */
- }
- else { /* (...) */
- capturing_parens:
- parno = RExC_npar;
- RExC_npar++;
-
- ret = reganode(pRExC_state, OPEN, parno);
- if (!SIZE_ONLY ){
- if (!RExC_nestroot)
- RExC_nestroot = parno;
- if (RExC_seen & REG_SEEN_RECURSE
- && !RExC_open_parens[parno-1])
- {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting open paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ret)));
- RExC_open_parens[parno-1]= ret;
- }
- }
- Set_Node_Length(ret, 1); /* MJD */
- Set_Node_Offset(ret, RExC_parse); /* MJD */
- is_open = 1;
- }
- }
- else /* ! paren */
- ret = NULL;
-
- parse_rest:
- /* Pick up the branches, linking them together. */
- parse_start = RExC_parse; /* MJD */
- br = regbranch(pRExC_state, &flags, 1,depth+1);
-
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
-
- /* branch_len = (paren != 0); */
-
- if (br == NULL)
- return(NULL);
- if (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, BRANCHJ, br, depth+1);
- }
- else { /* MJD */
- reginsert(pRExC_state, BRANCH, br, depth+1);
- Set_Node_Length(br, paren != 0);
- Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start);
- }
- have_branch = 1;
- if (SIZE_ONLY)
- RExC_extralen += 1; /* For BRANCHJ-BRANCH. */
- }
- else if (paren == ':') {
- *flagp |= flags&SIMPLE;
- }
- if (is_open) { /* Starts with OPEN. */
- REGTAIL(pRExC_state, ret, br); /* OPEN -> first. */
- }
- else if (paren != '?') /* Not Conditional */
- ret = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- lastbr = br;
- while (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- ender = reganode(pRExC_state, LONGJMP,0);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */
- }
- if (SIZE_ONLY)
- RExC_extralen += 2; /* Account for LONGJMP. */
- nextchar(pRExC_state);
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
- br = regbranch(pRExC_state, &flags, 0, depth+1);
-
- if (br == NULL)
- return(NULL);
- REGTAIL(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */
- lastbr = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- }
-
- if (have_branch || paren != ':') {
- /* Make a closing node, and hook it on the end. */
- switch (paren) {
- case ':':
- ender = reg_node(pRExC_state, TAIL);
- break;
- case 1:
- ender = reganode(pRExC_state, CLOSE, parno);
- if (!SIZE_ONLY && RExC_seen & REG_SEEN_RECURSE) {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting close paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ender)));
- RExC_close_parens[parno-1]= ender;
- if (RExC_nestroot == parno)
- RExC_nestroot = 0;
- }
- Set_Node_Offset(ender,RExC_parse+1); /* MJD */
- Set_Node_Length(ender,1); /* MJD */
- break;
- case '<':
- case ',':
- case '=':
- case '!':
- *flagp &= ~HASWIDTH;
- /* FALL THROUGH */
- case '>':
- ender = reg_node(pRExC_state, SUCCEED);
- break;
- case 0:
- ender = reg_node(pRExC_state, END);
- if (!SIZE_ONLY) {
- assert(!RExC_opend); /* there can only be one! */
- RExC_opend = ender;
- }
- break;
- }
- REGTAIL(pRExC_state, lastbr, ender);
-
- if (have_branch && !SIZE_ONLY) {
- if (depth==1)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
-
- /* Hook the tails of the branches to the closing node. */
- for (br = ret; br; br = regnext(br)) {
- const U8 op = PL_regkind[OP(br)];
- if (op == BRANCH) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(br), ender);
- }
- else if (op == BRANCHJ) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(NEXTOPER(br)), ender);
- }
- }
- }
- }
-
- {
- const char *p;
- static const char parens[] = "=!<,>";
-
- if (paren && (p = strchr(parens, paren))) {
- U8 node = ((p - parens) % 2) ? UNLESSM : IFMATCH;
- int flag = (p - parens) > 1;
-
- if (paren == '>')
- node = SUSPEND, flag = 0;
- reginsert(pRExC_state, node,ret, depth+1);
- Set_Node_Cur_Length(ret);
- Set_Node_Offset(ret, parse_start + 1);
- ret->flags = flag;
- REGTAIL_STUDY(pRExC_state, ret, reg_node(pRExC_state, TAIL));
- }
- }
-
- /* Check for proper termination. */
- if (paren) {
- RExC_flags = oregflags;
- if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched (");
- }
- }
- else if (!paren && RExC_parse < RExC_end) {
- if (*RExC_parse == ')') {
- RExC_parse++;
- vFAIL("Unmatched )");
- }
- else
- FAIL("Junk on end of regexp"); /* "Can't happen". */
- /* NOTREACHED */
- }
- if (after_freeze)
- RExC_npar = after_freeze;
- return(ret);
-}
-
-/*
- - regbranch - one alternative of an | operator
- *
- * Implements the concatenation operator.
- */
-STATIC regnode *
-S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register regnode *chain = NULL;
- register regnode *latest;
- I32 flags = 0, c = 0;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGBRANCH;
-
- DEBUG_PARSE("brnc");
-
- if (first)
- ret = NULL;
- else {
- if (!SIZE_ONLY && RExC_extralen)
- ret = reganode(pRExC_state, BRANCHJ,0);
- else {
- ret = reg_node(pRExC_state, BRANCH);
- Set_Node_Length(ret, 1);
- }
- }
-
- if (!first && SIZE_ONLY)
- RExC_extralen += 1; /* BRANCHJ */
-
- *flagp = WORST; /* Tentatively. */
-
- RExC_parse--;
- nextchar(pRExC_state);
- while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') {
- flags &= ~TRYAGAIN;
- latest = regpiece(pRExC_state, &flags,depth+1);
- if (latest == NULL) {
- if (flags & TRYAGAIN)
- continue;
- return(NULL);
- }
- else if (ret == NULL)
- ret = latest;
- *flagp |= flags&(HASWIDTH|POSTPONED);
- if (chain == NULL) /* First piece. */
- *flagp |= flags&SPSTART;
- else {
- RExC_naughty++;
- REGTAIL(pRExC_state, chain, latest);
- }
- chain = latest;
- c++;
- }
- if (chain == NULL) { /* Loop ran zero times. */
- chain = reg_node(pRExC_state, NOTHING);
- if (ret == NULL)
- ret = chain;
- }
- if (c == 1) {
- *flagp |= flags&SIMPLE;
- }
-
- return ret;
-}
-
-/*
- - regpiece - something followed by possible [*+?]
- *
- * Note that the branching code sequences used for ? and the general cases
- * of * and + are somewhat optimized: they use the same NOTHING node as
- * both the endmarker for their branch list and the body of the last branch.
- * It might seem that this node could be dispensed with entirely, but the
- * endmarker role is not redundant.
- */
-STATIC regnode *
-S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register char op;
- register char *next;
- I32 flags;
- const char * const origparse = RExC_parse;
- I32 min;
- I32 max = REG_INFTY;
- char *parse_start;
- const char *maxpos = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPIECE;
-
- DEBUG_PARSE("piec");
-
- ret = regatom(pRExC_state, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN)
- *flagp |= TRYAGAIN;
- return(NULL);
- }
-
- op = *RExC_parse;
-
- if (op == '{' && regcurly(RExC_parse)) {
- maxpos = NULL;
- parse_start = RExC_parse; /* MJD */
- next = RExC_parse + 1;
- while (isDIGIT(*next) || *next == ',') {
- if (*next == ',') {
- if (maxpos)
- break;
- else
- maxpos = next;
- }
- next++;
- }
- if (*next == '}') { /* got one */
- if (!maxpos)
- maxpos = next;
- RExC_parse++;
- min = atoi(RExC_parse);
- if (*maxpos == ',')
- maxpos++;
- else
- maxpos = RExC_parse;
- max = atoi(maxpos);
- if (!max && *maxpos != '0')
- max = REG_INFTY; /* meaning "infinity" */
- else if (max >= REG_INFTY)
- vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1);
- RExC_parse = next;
- nextchar(pRExC_state);
-
- do_curly:
- if ((flags&SIMPLE)) {
- RExC_naughty += 2 + RExC_naughty / 2;
- reginsert(pRExC_state, CURLY, ret, depth+1);
- Set_Node_Offset(ret, parse_start+1); /* MJD */
- Set_Node_Cur_Length(ret);
- }
- else {
- regnode * const w = reg_node(pRExC_state, WHILEM);
-
- w->flags = 0;
- REGTAIL(pRExC_state, ret, w);
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, LONGJMP,ret, depth+1);
- reginsert(pRExC_state, NOTHING,ret, depth+1);
- NEXT_OFF(ret) = 3; /* Go over LONGJMP. */
- }
- reginsert(pRExC_state, CURLYX,ret, depth+1);
- /* MJD hk */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Length(ret,
- op == '{' ? (RExC_parse - parse_start) : 1);
-
- if (!SIZE_ONLY && RExC_extralen)
- NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */
- REGTAIL(pRExC_state, ret, reg_node(pRExC_state, NOTHING));
- if (SIZE_ONLY)
- RExC_whilem_seen++, RExC_extralen += 3;
- RExC_naughty += 4 + RExC_naughty; /* compound interest */
- }
- ret->flags = 0;
-
- if (min > 0)
- *flagp = WORST;
- if (max > 0)
- *flagp |= HASWIDTH;
- if (max < min)
- vFAIL("Can't do {n,m} with n > m");
- if (!SIZE_ONLY) {
- ARG1_SET(ret, (U16)min);
- ARG2_SET(ret, (U16)max);
- }
-
- goto nest_check;
- }
- }
-
- if (!ISMULT1(op)) {
- *flagp = flags;
- return(ret);
- }
-
-#if 0 /* Now runtime fix should be reliable. */
-
- /* if this is reinstated, don't forget to put this back into perldiag:
-
- =item Regexp *+ operand could be empty at {#} in regex m/%s/
-
- (F) The part of the regexp subject to either the * or + quantifier
- could match an empty string. The {#} shows in the regular
- expression about where the problem was discovered.
-
- */
-
- if (!(flags&HASWIDTH) && op != '?')
- vFAIL("Regexp *+ operand could be empty");
-#endif
-
- parse_start = RExC_parse;
- nextchar(pRExC_state);
-
- *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH);
-
- if (op == '*' && (flags&SIMPLE)) {
- reginsert(pRExC_state, STAR, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 4;
- }
- else if (op == '*') {
- min = 0;
- goto do_curly;
- }
- else if (op == '+' && (flags&SIMPLE)) {
- reginsert(pRExC_state, PLUS, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 3;
- }
- else if (op == '+') {
- min = 1;
- goto do_curly;
- }
- else if (op == '?') {
- min = 0; max = 1;
- goto do_curly;
- }
- nest_check:
- if (!SIZE_ONLY && !(flags&(HASWIDTH|POSTPONED)) && max > REG_INFTY/3) {
- ckWARN3reg(RExC_parse,
- "%.*s matches null string many times",
- (int)(RExC_parse >= origparse ? RExC_parse - origparse : 0),
- origparse);
- }
-
- if (RExC_parse < RExC_end && *RExC_parse == '?') {
- nextchar(pRExC_state);
- reginsert(pRExC_state, MINMOD, ret, depth+1);
- REGTAIL(pRExC_state, ret, ret + NODE_STEP_REGNODE);
- }
-#ifndef REG_ALLOW_MINMOD_SUSPEND
- else
-#endif
- if (RExC_parse < RExC_end && *RExC_parse == '+') {
- regnode *ender;
- nextchar(pRExC_state);
- ender = reg_node(pRExC_state, SUCCEED);
- REGTAIL(pRExC_state, ret, ender);
- reginsert(pRExC_state, SUSPEND, ret, depth+1);
- ret->flags = 0;
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, ret, ender);
- /*ret= ender;*/
- }
-
- if (RExC_parse < RExC_end && ISMULT2(RExC_parse)) {
- RExC_parse++;
- vFAIL("Nested quantifiers");
- }
-
- return(ret);
-}
-
-
-/* reg_namedseq(pRExC_state,UVp)
-
- This is expected to be called by a parser routine that has
- recognized '\N' and needs to handle the rest. RExC_parse is
- expected to point at the first char following the N at the time
- of the call.
-
- If valuep is non-null then it is assumed that we are parsing inside
- of a charclass definition and the first codepoint in the resolved
- string is returned via *valuep and the routine will return NULL.
- In this mode if a multichar string is returned from the charnames
- handler a warning will be issued, and only the first char in the
- sequence will be examined. If the string returned is zero length
- then the value of *valuep is undefined and NON-NULL will
- be returned to indicate failure. (This will NOT be a valid pointer
- to a regnode.)
-
- If valuep is null then it is assumed that we are parsing normal text
- and inserts a new EXACT node into the program containing the resolved
- string and returns a pointer to the new node. If the string is
- zerolength a NOTHING node is emitted.
-
- On success RExC_parse is set to the char following the endbrace.
- Parsing failures will generate a fatal errorvia vFAIL(...)
-
- NOTE: We cache all results from the charnames handler locally in
- the RExC_charnames hash (created on first use) to prevent a charnames
- handler from playing silly-buggers and returning a short string and
- then a long string for a given pattern. Since the regexp program
- size is calculated during an initial parse this would result
- in a buffer overrun so we cache to prevent the charname result from
- changing during the course of the parse.
-
- */
-STATIC regnode *
-S_reg_namedseq(pTHX_ RExC_state_t *pRExC_state, UV *valuep, I32 *flagp)
-{
- char * name; /* start of the content of the name */
- char * endbrace; /* endbrace following the name */
- SV *sv_str = NULL;
- SV *sv_name = NULL;
- STRLEN len; /* this has various purposes throughout the code */
- bool cached = 0; /* if this is true then we shouldn't refcount dev sv_str */
- regnode *ret = NULL;
-
- PERL_ARGS_ASSERT_REG_NAMEDSEQ;
-
- if (*RExC_parse != '{' ||
- (*RExC_parse == '{' && RExC_parse[1]
- && strchr("0123456789", RExC_parse[1])))
- {
- GET_RE_DEBUG_FLAGS_DECL;
- if (valuep)
- /* no bare \N in a charclass */
- vFAIL("Missing braces on \\N{}");
- GET_RE_DEBUG_FLAGS;
- nextchar(pRExC_state);
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- RExC_parse--;
- Set_Node_Length(ret, 1); /* MJD */
- return ret;
- }
- name = RExC_parse+1;
- endbrace = strchr(RExC_parse, '}');
- if ( ! endbrace ) {
- RExC_parse++;
- vFAIL("Missing right brace on \\N{}");
- }
- RExC_parse = endbrace + 1;
-
-
- /* RExC_parse points at the beginning brace,
- endbrace points at the last */
- if ( name[0]=='U' && name[1]=='+' ) {
- /* its a "Unicode hex" notation {U+89AB} */
- I32 fl = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX
- | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0);
- UV cp;
- len = (STRLEN)(endbrace - name - 2);
- cp = grok_hex(name + 2, &len, &fl, NULL);
- if ( len != (STRLEN)(endbrace - name - 2) ) {
- cp = 0xFFFD;
- }
- if ( valuep ) {
- if (cp > 0xff) RExC_utf8 = 1;
- *valuep = cp;
- return NULL;
- }
-
- /* Need to convert to utf8 if either: won't fit into a byte, or the re
- * is going to be in utf8 and the representation changes under utf8. */
- if (cp > 0xff || (RExC_utf8 && ! UNI_IS_INVARIANT(cp))) {
- U8 string[UTF8_MAXBYTES+1];
- U8 *tmps;
- RExC_utf8 = 1;
- tmps = uvuni_to_utf8(string, cp);
- sv_str = newSVpvn_utf8((char*)string, tmps - string, TRUE);
- } else { /* Otherwise, no need for utf8, can skip that step */
- char string;
- string = (char)cp;
- sv_str= newSVpvn(&string, 1);
- }
- } else {
- /* fetch the charnames handler for this scope */
- HV * const table = GvHV(PL_hintgv);
- SV **cvp= table ?
- hv_fetchs(table, "charnames", FALSE) :
- NULL;
- SV *cv= cvp ? *cvp : NULL;
- HE *he_str;
- int count;
- /* create an SV with the name as argument */
- sv_name = newSVpvn(name, endbrace - name);
-
- if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
- vFAIL2("Constant(\\N{%" SVf "}) unknown: "
- "(possibly a missing \"use charnames ...\")",
- SVfARG(sv_name));
- }
- if (!cvp || !SvOK(*cvp)) { /* when $^H{charnames} = undef; */
- vFAIL2("Constant(\\N{%" SVf "}): "
- "$^H{charnames} is not defined", SVfARG(sv_name));
- }
-
-
-
- if (!RExC_charnames) {
- /* make sure our cache is allocated */
- RExC_charnames = newHV();
- sv_2mortal(MUTABLE_SV(RExC_charnames));
- }
- /* see if we have looked this one up before */
- he_str = hv_fetch_ent( RExC_charnames, sv_name, 0, 0 );
- if ( he_str ) {
- sv_str = HeVAL(he_str);
- cached = 1;
- } else {
- dSP ;
-
- ENTER ;
- SAVETMPS ;
- PUSHMARK(SP) ;
-
- XPUSHs(sv_name);
-
- PUTBACK ;
-
- count= call_sv(cv, G_SCALAR);
-
- if (count == 1) { /* XXXX is this right? dmq */
- sv_str = POPs;
- SvREFCNT_inc_simple_void(sv_str);
- }
-
- SPAGAIN ;
- PUTBACK ;
- FREETMPS ;
- LEAVE ;
-
- if ( !sv_str || !SvOK(sv_str) ) {
- vFAIL2("Constant(\\N{%" SVf "}): Call to &{$^H{charnames}} "
- "did not return a defined value", SVfARG(sv_name));
- }
- if (hv_store_ent( RExC_charnames, sv_name, sv_str, 0))
- cached = 1;
- }
- }
- if (valuep) {
- char *p = SvPV(sv_str, len);
- if (len) {
- STRLEN numlen = 1;
- if ( SvUTF8(sv_str) ) {
- *valuep = utf8_to_uvchr((U8*)p, &numlen);
- if (*valuep > 0x7F)
- RExC_utf8 = 1;
- /* XXXX
- We have to turn on utf8 for high bit chars otherwise
- we get failures with
-
- "ss" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
- "SS" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
-
- This is different from what \x{} would do with the same
- codepoint, where the condition is > 0xFF.
- - dmq
- */
-
-
- } else {
- *valuep = (UV)*p;
- /* warn if we havent used the whole string? */
- }
- if (numlen<len && SIZE_ONLY) {
- ckWARN2reg(RExC_parse,
- "Ignoring excess chars from \\N{%" SVf "} in character class",
- SVfARG(sv_name)
- );
- }
- } else if (SIZE_ONLY) {
- ckWARN2reg(RExC_parse,
- "Ignoring zero length \\N{%" SVf "} in character class",
- SVfARG(sv_name)
- );
- }
- if (sv_name)
- SvREFCNT_dec(sv_name);
- if (!cached)
- SvREFCNT_dec(sv_str);
- return len ? NULL : (regnode *)&len;
- } else if(SvCUR(sv_str)) {
-
- char *s;
- char *p, *pend;
- STRLEN charlen = 1;
-#ifdef DEBUGGING
- char * parse_start = name-3; /* needed for the offsets */
-#endif
- GET_RE_DEBUG_FLAGS_DECL; /* needed for the offsets */
-
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s= STRING(ret);
-
- if ( RExC_utf8 && !SvUTF8(sv_str) ) {
- sv_utf8_upgrade(sv_str);
- } else if ( !RExC_utf8 && SvUTF8(sv_str) ) {
- RExC_utf8= 1;
- }
-
- p = SvPV(sv_str, len);
- pend = p + len;
- /* len is the length written, charlen is the size the char read */
- for ( len = 0; p < pend; p += charlen ) {
- if (UTF) {
- UV uvc = utf8_to_uvchr((U8*)p, &charlen);
- if (FOLD) {
- STRLEN foldlen,numlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
- uvc = toFOLD_uni(uvc, tmpbuf, &foldlen);
- /* Emit all the Unicode characters. */
-
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen)
- {
- uvc = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- } else {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- } else {
- len++;
- REGC(*p, s++);
- }
- }
- if (SIZE_ONLY) {
- RExC_size += STR_SZ(len);
- } else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- } else { /* zero length */
- ret = reg_node(pRExC_state,NOTHING);
- }
- if (!cached) {
- SvREFCNT_dec(sv_str);
- }
- if (sv_name) {
- SvREFCNT_dec(sv_name);
- }
- return ret;
-
-}
-
-
-/*
- * reg_recode
- *
- * It returns the code point in utf8 for the value in *encp.
- * value: a code value in the source encoding
- * encp: a pointer to an Encode object
- *
- * If the result from Encode is not a single character,
- * it returns U+FFFD (Replacement character) and sets *encp to NULL.
- */
-STATIC UV
-S_reg_recode(pTHX_ const char value, SV **encp)
-{
- STRLEN numlen = 1;
- SV * const sv = newSVpvn_flags(&value, numlen, SVs_TEMP);
- const char * const s = *encp ? sv_recode_to_utf8(sv, *encp) : SvPVX(sv);
- const STRLEN newlen = SvCUR(sv);
- UV uv = UNICODE_REPLACEMENT;
-
- PERL_ARGS_ASSERT_REG_RECODE;
-
- if (newlen)
- uv = SvUTF8(sv)
- ? utf8n_to_uvchr((U8*)s, newlen, &numlen, UTF8_ALLOW_DEFAULT)
- : *(U8*)s;
-
- if (!newlen || numlen != newlen) {
- uv = UNICODE_REPLACEMENT;
- *encp = NULL;
- }
- return uv;
-}
-
-
-/*
- - regatom - the lowest level
-
- Try to identify anything special at the start of the pattern. If there
- is, then handle it as required. This may involve generating a single regop,
- such as for an assertion; or it may involve recursing, such as to
- handle a () structure.
-
- If the string doesn't start with something special then we gobble up
- as much literal text as we can.
-
- Once we have been able to handle whatever type of thing started the
- sequence, we return.
-
- Note: we have to be careful with escapes, as they can be both literal
- and special, and in the case of \10 and friends can either, depending
- on context. Specifically there are two seperate switches for handling
- escape sequences, with the one for handling literal escapes requiring
- a dummy entry for all of the special escapes that are actually handled
- by the other.
-*/
-
-STATIC regnode *
-S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret = NULL;
- I32 flags;
- char *parse_start = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_PARSE("atom");
- *flagp = WORST; /* Tentatively. */
-
- PERL_ARGS_ASSERT_REGATOM;
-
-tryagain:
- switch ((U8)*RExC_parse) {
- case '^':
- RExC_seen_zerolen++;
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MBOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SBOL);
- else
- ret = reg_node(pRExC_state, BOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '$':
- nextchar(pRExC_state);
- if (*RExC_parse)
- RExC_seen_zerolen++;
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MEOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SEOL);
- else
- ret = reg_node(pRExC_state, EOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '.':
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SANY);
- else
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '[':
- {
- char * const oregcomp_parse = ++RExC_parse;
- ret = regclass(pRExC_state,depth+1);
- if (*RExC_parse != ']') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched [");
- }
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */
- break;
- }
- case '(':
- nextchar(pRExC_state);
- ret = reg(pRExC_state, 1, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN) {
- if (RExC_parse == RExC_end) {
- /* Make parent create an empty node if needed. */
- *flagp |= TRYAGAIN;
- return(NULL);
- }
- goto tryagain;
- }
- return(NULL);
- }
- *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE|POSTPONED);
- break;
- case '|':
- case ')':
- if (flags & TRYAGAIN) {
- *flagp |= TRYAGAIN;
- return NULL;
- }
- vFAIL("Internal urp");
- /* Supposed to be caught earlier. */
- break;
- case '{':
- if (!regcurly(RExC_parse)) {
- RExC_parse++;
- goto defchar;
- }
- /* FALL THROUGH */
- case '?':
- case '+':
- case '*':
- RExC_parse++;
- vFAIL("Quantifier follows nothing");
- break;
- case 0xDF:
- case 0xC3:
- case 0xCE:
- do_foldchar:
- if (!LOC && FOLD) {
- U32 len,cp;
- len=0; /* silence a spurious compiler warning */
- if ((cp = what_len_TRICKYFOLD_safe(RExC_parse,RExC_end,UTF,len))) {
- *flagp |= HASWIDTH; /* could be SIMPLE too, but needs a handler in regexec.regrepeat */
- RExC_parse+=len-1; /* we get one from nextchar() as well. :-( */
- ret = reganode(pRExC_state, FOLDCHAR, cp);
- Set_Node_Length(ret, 1); /* MJD */
- nextchar(pRExC_state); /* kill whitespace under /x */
- return ret;
- }
- }
- goto outer_default;
- case '\\':
- /* Special Escapes
-
- This switch handles escape sequences that resolve to some kind
- of special regop and not to literal text. Escape sequnces that
- resolve to literal text are handled below in the switch marked
- "Literal Escapes".
-
- Every entry in this switch *must* have a corresponding entry
- in the literal escape switch. However, the opposite is not
- required, as the default for this switch is to jump to the
- literal text handling code.
- */
- switch ((U8)*++RExC_parse) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- goto do_foldchar;
- /* Special Escapes */
- case 'A':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, SBOL);
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'G':
- ret = reg_node(pRExC_state, GPOS);
- RExC_seen |= REG_SEEN_GPOS;
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'K':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, KEEPS);
- *flagp |= SIMPLE;
- /* XXX:dmq : disabling in-place substitution seems to
- * be necessary here to avoid cases of memory corruption, as
- * with: C<$_="x" x 80; s/x\K/y/> -- rgs
- */
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- goto finish_meta_pat;
- case 'Z':
- ret = reg_node(pRExC_state, SEOL);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'z':
- ret = reg_node(pRExC_state, EOS);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'C':
- ret = reg_node(pRExC_state, CANY);
- RExC_seen |= REG_SEEN_CANY;
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'X':
- ret = reg_node(pRExC_state, CLUMP);
- *flagp |= HASWIDTH;
- goto finish_meta_pat;
- case 'w':
- ret = reg_node(pRExC_state, (U8)(LOC ? ALNUML : ALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'W':
- ret = reg_node(pRExC_state, (U8)(LOC ? NALNUML : NALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'b':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? BOUNDL : BOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'B':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? NBOUNDL : NBOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 's':
- ret = reg_node(pRExC_state, (U8)(LOC ? SPACEL : SPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'S':
- ret = reg_node(pRExC_state, (U8)(LOC ? NSPACEL : NSPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'd':
- ret = reg_node(pRExC_state, DIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'D':
- ret = reg_node(pRExC_state, NDIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'R':
- ret = reg_node(pRExC_state, LNBREAK);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'h':
- ret = reg_node(pRExC_state, HORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'H':
- ret = reg_node(pRExC_state, NHORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'v':
- ret = reg_node(pRExC_state, VERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'V':
- ret = reg_node(pRExC_state, NVERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- finish_meta_pat:
- nextchar(pRExC_state);
- Set_Node_Length(ret, 2); /* MJD */
- break;
- case 'p':
- case 'P':
- {
- char* const oldregxend = RExC_end;
-#ifdef DEBUGGING
- char* parse_start = RExC_parse - 2;
-#endif
-
- if (RExC_parse[1] == '{') {
- /* a lovely hack--pretend we saw [\pX] instead */
- RExC_end = strchr(RExC_parse, '}');
- if (!RExC_end) {
- const U8 c = (U8)*RExC_parse;
- RExC_parse += 2;
- RExC_end = oldregxend;
- vFAIL2("Missing right brace on \\%c{}", c);
- }
- RExC_end++;
- }
- else {
- RExC_end = RExC_parse + 2;
- if (RExC_end > oldregxend)
- RExC_end = oldregxend;
- }
- RExC_parse--;
-
- ret = regclass(pRExC_state,depth+1);
-
- RExC_end = oldregxend;
- RExC_parse--;
-
- Set_Node_Offset(ret, parse_start + 2);
- Set_Node_Cur_Length(ret);
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- }
- break;
- case 'N':
- /* Handle \N and \N{NAME} here and not below because it can be
- multicharacter. join_exact() will join them up later on.
- Also this makes sure that things like /\N{BLAH}+/ and
- \N{BLAH} being multi char Just Happen. dmq*/
- ++RExC_parse;
- ret= reg_namedseq(pRExC_state, NULL, flagp);
- break;
- case 'k': /* Handle \k<NAME> and \k'NAME' */
- parse_named_seq:
- {
- char ch= RExC_parse[1];
- if (ch != '<' && ch != '\'' && ch != '{') {
- RExC_parse++;
- vFAIL2("Sequence %.2s... not terminated",parse_start);
- } else {
- /* this pretty much dupes the code for (?P=...) in reg(), if
- you change this make sure you change that */
- char* name_start = (RExC_parse += 2);
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- ch= (ch == '<') ? '>' : (ch == '{') ? '}' : '\'';
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
-
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
-
- }
- break;
- }
- case 'g':
- case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 num;
- bool isg = *RExC_parse == 'g';
- bool isrel = 0;
- bool hasbrace = 0;
- if (isg) {
- RExC_parse++;
- if (*RExC_parse == '{') {
- RExC_parse++;
- hasbrace = 1;
- }
- if (*RExC_parse == '-') {
- RExC_parse++;
- isrel = 1;
- }
- if (hasbrace && !isDIGIT(*RExC_parse)) {
- if (isrel) RExC_parse--;
- RExC_parse -= 2;
- goto parse_named_seq;
- } }
- num = atoi(RExC_parse);
- if (isg && num == 0)
- vFAIL("Reference to invalid group 0");
- if (isrel) {
- num = RExC_npar - num;
- if (num < 1)
- vFAIL("Reference to nonexistent or unclosed group");
- }
- if (!isg && num > 9 && num >= RExC_npar)
- goto defchar;
- else {
- char * const parse_start = RExC_parse - 1; /* MJD */
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (parse_start == RExC_parse - 1)
- vFAIL("Unterminated \\g... pattern");
- if (hasbrace) {
- if (*RExC_parse != '}')
- vFAIL("Unterminated \\g{...} pattern");
- RExC_parse++;
- }
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens)
- vFAIL("Reference to nonexistent group");
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? REFFL : REFF) : REF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- }
- }
- break;
- case '\0':
- if (RExC_parse >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- /* Do not generate "unrecognized" warnings here, we fall
- back into the quick-grab loop below */
- parse_start--;
- goto defchar;
- }
- break;
-
- case '#':
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if ( reg_skipcomment( pRExC_state ) )
- goto tryagain;
- }
- /* FALL THROUGH */
-
- default:
- outer_default:{
- register STRLEN len;
- register UV ender;
- register char *p;
- char *s;
- STRLEN foldlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
-
- parse_start = RExC_parse - 1;
-
- RExC_parse++;
-
- defchar:
- ender = 0;
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s = STRING(ret);
- for (len = 0, p = RExC_parse - 1;
- len < 127 && p < RExC_end;
- len++)
- {
- char * const oldp = p;
-
- if (RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- switch ((U8)*p) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case '^':
- case '$':
- case '.':
- case '[':
- case '(':
- case ')':
- case '|':
- goto loopdone;
- case '\\':
- /* Literal Escapes Switch
-
- This switch is meant to handle escape sequences that
- resolve to a literal character.
-
- Every escape sequence that represents something
- else, like an assertion or a char class, is handled
- in the switch marked 'Special Escapes' above in this
- routine, but also has an entry here as anything that
- isn't explicitly mentioned here will be treated as
- an unescaped equivalent literal.
- */
-
- switch ((U8)*++p) {
- /* These are all the special escapes. */
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case 'A': /* Start assertion */
- case 'b': case 'B': /* Word-boundary assertion*/
- case 'C': /* Single char !DANGEROUS! */
- case 'd': case 'D': /* digit class */
- case 'g': case 'G': /* generic-backref, pos assertion */
- case 'h': case 'H': /* HORIZWS */
- case 'k': case 'K': /* named backref, keep marker */
- case 'N': /* named char sequence */
- case 'p': case 'P': /* Unicode property */
- case 'R': /* LNBREAK */
- case 's': case 'S': /* space class */
- case 'v': case 'V': /* VERTWS */
- case 'w': case 'W': /* word class */
- case 'X': /* eXtended Unicode "combining character sequence" */
- case 'z': case 'Z': /* End of line/string assertion */
- --p;
- goto loopdone;
-
- /* Anything after here is an escape that resolves to a
- literal. (Except digits, which may or may not)
- */
- case 'n':
- ender = '\n';
- p++;
- break;
- case 'r':
- ender = '\r';
- p++;
- break;
- case 't':
- ender = '\t';
- p++;
- break;
- case 'f':
- ender = '\f';
- p++;
- break;
- case 'e':
- ender = ASCII_TO_NATIVE('\033');
- p++;
- break;
- case 'a':
- ender = ASCII_TO_NATIVE('\007');
- p++;
- break;
- case 'x':
- if (*++p == '{') {
- char* const e = strchr(p, '}');
-
- if (!e) {
- RExC_parse = p + 1;
- vFAIL("Missing right brace on \\x{}");
- }
- else {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = e - p - 1;
- ender = grok_hex(p + 1, &numlen, &flags, NULL);
- if (ender > 0xff)
- RExC_utf8 = 1;
- p = e + 1;
- }
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = 2;
- ender = grok_hex(p, &numlen, &flags, NULL);
- p += numlen;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- p++;
- ender = UCHARAT(p++);
- ender = toCTRL(ender);
- break;
- case '0': case '1': case '2': case '3':case '4':
- case '5': case '6': case '7': case '8':case '9':
- if (*p == '0' ||
- (isDIGIT(p[1]) && atoi(p) >= RExC_npar) ) {
- I32 flags = 0;
- STRLEN numlen = 3;
- ender = grok_oct(p, &numlen, &flags, NULL);
-
- /* An octal above 0xff is interpreted differently
- * depending on if the re is in utf8 or not. If it
- * is in utf8, the value will be itself, otherwise
- * it is interpreted as modulo 0x100. It has been
- * decided to discourage the use of octal above the
- * single-byte range. For now, warn only when
- * it ends up modulo */
- if (SIZE_ONLY && ender >= 0x100
- && ! UTF && ! PL_encoding) {
- ckWARNregdep(p, "Use of octal value above 377 is deprecated");
- }
- p += numlen;
- }
- else {
- --p;
- goto loopdone;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- recode_encoding:
- {
- SV* enc = PL_encoding;
- ender = reg_recode((const char)(U8)ender, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(p, "Invalid escape in the specified encoding");
- RExC_utf8 = 1;
- }
- break;
- case '\0':
- if (p >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- if (!SIZE_ONLY&& isALPHA(*p))
- ckWARN2reg(p + 1, "Unrecognized escape \\%c passed through", UCHARAT(p));
- goto normal_default;
- }
- break;
- default:
- normal_default:
- if (UTF8_IS_START(*p) && UTF) {
- STRLEN numlen;
- ender = utf8n_to_uvchr((U8*)p, RExC_end - p,
- &numlen, UTF8_ALLOW_DEFAULT);
- p += numlen;
- }
- else
- ender = *p++;
- break;
- }
- if ( RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- if (UTF && FOLD) {
- /* Prime the casefolded buffer. */
- ender = toFOLD_uni(ender, tmpbuf, &foldlen);
- }
- if (p < RExC_end && ISMULT2(p)) { /* Back off on ?+*. */
- if (len)
- p = oldp;
- else if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- }
- else {
- len++;
- REGC((char)ender, s++);
- }
- break;
- }
- if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- len += unilen;
- s += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break;
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- len--;
- }
- else
- REGC((char)ender, s++);
- }
- loopdone:
- RExC_parse = p - 1;
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
- {
- /* len is STRLEN which is unsigned, need to copy to signed */
- IV iv = len;
- if (iv < 0)
- vFAIL("Internal disaster");
- }
- if (len > 0)
- *flagp |= HASWIDTH;
- if (len == 1 && UNI_IS_INVARIANT(ender))
- *flagp |= SIMPLE;
-
- if (SIZE_ONLY)
- RExC_size += STR_SZ(len);
- else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- }
- break;
- }
-
- return(ret);
-}
-
-STATIC char *
-S_regwhite( RExC_state_t *pRExC_state, char *p )
-{
- const char *e = RExC_end;
-
- PERL_ARGS_ASSERT_REGWHITE;
-
- while (p < e) {
- if (isSPACE(*p))
- ++p;
- else if (*p == '#') {
- bool ended = 0;
- do {
- if (*p++ == '\n') {
- ended = 1;
- break;
- }
- } while (p < e);
- if (!ended)
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- }
- else
- break;
- }
- return p;
-}
-
-/* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]].
- Character classes ([:foo:]) can also be negated ([:^foo:]).
- Returns a named class id (ANYOF_XXX) if successful, -1 otherwise.
- Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed,
- but trigger failures because they are currently unimplemented. */
-
-#define POSIXCC_DONE(c) ((c) == ':')
-#define POSIXCC_NOTYET(c) ((c) == '=' || (c) == '.')
-#define POSIXCC(c) (POSIXCC_DONE(c) || POSIXCC_NOTYET(c))
-
-STATIC I32
-S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value)
-{
- dVAR;
- I32 namedclass = OOB_NAMEDCLASS;
-
- PERL_ARGS_ASSERT_REGPPOSIXCC;
-
- if (value == '[' && RExC_parse + 1 < RExC_end &&
- /* I smell either [: or [= or [. -- POSIX has been here, right? */
- POSIXCC(UCHARAT(RExC_parse))) {
- const char c = UCHARAT(RExC_parse);
- char* const s = RExC_parse++;
-
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != c)
- RExC_parse++;
- if (RExC_parse == RExC_end)
- /* Grandfather lone [:, [=, [. */
- RExC_parse = s;
- else {
- const char* const t = RExC_parse++; /* skip over the c */
- assert(*t == c);
-
- if (UCHARAT(RExC_parse) == ']') {
- const char *posixcc = s + 1;
- RExC_parse++; /* skip over the ending ] */
-
- if (*s == ':') {
- const I32 complement = *posixcc == '^' ? *posixcc++ : 0;
- const I32 skip = t - posixcc;
-
- /* Initially switch on the length of the name. */
- switch (skip) {
- case 4:
- if (memEQ(posixcc, "word", 4)) /* this is not POSIX, this is the Perl \w */
- namedclass = complement ? ANYOF_NALNUM : ANYOF_ALNUM;
- break;
- case 5:
- /* Names all of length 5. */
- /* alnum alpha ascii blank cntrl digit graph lower
- print punct space upper */
- /* Offset 4 gives the best switch position. */
- switch (posixcc[4]) {
- case 'a':
- if (memEQ(posixcc, "alph", 4)) /* alpha */
- namedclass = complement ? ANYOF_NALPHA : ANYOF_ALPHA;
- break;
- case 'e':
- if (memEQ(posixcc, "spac", 4)) /* space */
- namedclass = complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC;
- break;
- case 'h':
- if (memEQ(posixcc, "grap", 4)) /* graph */
- namedclass = complement ? ANYOF_NGRAPH : ANYOF_GRAPH;
- break;
- case 'i':
- if (memEQ(posixcc, "asci", 4)) /* ascii */
- namedclass = complement ? ANYOF_NASCII : ANYOF_ASCII;
- break;
- case 'k':
- if (memEQ(posixcc, "blan", 4)) /* blank */
- namedclass = complement ? ANYOF_NBLANK : ANYOF_BLANK;
- break;
- case 'l':
- if (memEQ(posixcc, "cntr", 4)) /* cntrl */
- namedclass = complement ? ANYOF_NCNTRL : ANYOF_CNTRL;
- break;
- case 'm':
- if (memEQ(posixcc, "alnu", 4)) /* alnum */
- namedclass = complement ? ANYOF_NALNUMC : ANYOF_ALNUMC;
- break;
- case 'r':
- if (memEQ(posixcc, "lowe", 4)) /* lower */
- namedclass = complement ? ANYOF_NLOWER : ANYOF_LOWER;
- else if (memEQ(posixcc, "uppe", 4)) /* upper */
- namedclass = complement ? ANYOF_NUPPER : ANYOF_UPPER;
- break;
- case 't':
- if (memEQ(posixcc, "digi", 4)) /* digit */
- namedclass = complement ? ANYOF_NDIGIT : ANYOF_DIGIT;
- else if (memEQ(posixcc, "prin", 4)) /* print */
- namedclass = complement ? ANYOF_NPRINT : ANYOF_PRINT;
- else if (memEQ(posixcc, "punc", 4)) /* punct */
- namedclass = complement ? ANYOF_NPUNCT : ANYOF_PUNCT;
- break;
- }
- break;
- case 6:
- if (memEQ(posixcc, "xdigit", 6))
- namedclass = complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT;
- break;
- }
-
- if (namedclass == OOB_NAMEDCLASS)
- Simple_vFAIL3("POSIX class [:%.*s:] unknown",
- t - s - 1, s + 1);
- assert (posixcc[skip] == ':');
- assert (posixcc[skip+1] == ']');
- } else if (!SIZE_ONLY) {
- /* [[=foo=]] and [[.foo.]] are still future. */
-
- /* adjust RExC_parse so the warning shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse) != ']')
- RExC_parse++;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- } else {
- /* Maternal grandfather:
- * "[:" ending in ":" but not in ":]" */
- RExC_parse = s;
- }
- }
- }
-
- return namedclass;
-}
-
-STATIC void
-S_checkposixcc(pTHX_ RExC_state_t *pRExC_state)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_CHECKPOSIXCC;
-
- if (POSIXCC(UCHARAT(RExC_parse))) {
- const char *s = RExC_parse;
- const char c = *s++;
-
- while (isALNUM(*s))
- s++;
- if (*s && c == *s && s[1] == ']') {
- ckWARN3reg(s+2,
- "POSIX syntax [%c %c] belongs inside character classes",
- c, c);
-
- /* [[=foo=]] and [[.foo.]] are still future. */
- if (POSIXCC_NOTYET(c)) {
- /* adjust RExC_parse so the error shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse++) != ']')
- NOOP;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- }
- }
-}
-
-
-#define _C_C_T_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_N##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '!'; \
- what = WORD; \
- break
-
-#define _C_C_T_NOLOC_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '!'; \
- what = WORD; \
- break
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define POSIX_CC_UNI_NAME(CCNAME) CCNAME
-#else
-#define POSIX_CC_UNI_NAME(CCNAME) "Posix" CCNAME
-#endif
-
-/*
- parse a class specification and produce either an ANYOF node that
- matches the pattern or if the pattern matches a single char only and
- that char is < 256 and we are case insensitive then we produce an
- EXACT node instead.
-*/
-
-STATIC regnode *
-S_regclass(pTHX_ RExC_state_t *pRExC_state, U32 depth)
-{
- dVAR;
- register UV nextvalue;
- register IV prevvalue = OOB_UNICODE;
- register IV range = 0;
- UV value = 0; /* XXX:dmq: needs to be referenceable (unfortunately) */
- register regnode *ret;
- STRLEN numlen;
- IV namedclass;
- char *rangebegin = NULL;
- bool need_class = 0;
- SV *listsv = NULL;
- UV n;
- bool optimize_invert = TRUE;
- AV* unicode_alternate = NULL;
-#ifdef EBCDIC
- UV literal_endpoint = 0;
-#endif
- UV stored = 0; /* number of chars stored in the class */
-
- regnode * const orig_emit = RExC_emit; /* Save the original RExC_emit in
- case we need to change the emitted regop to an EXACT. */
- const char * orig_parse = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCLASS;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- DEBUG_PARSE("clas");
-
- /* Assume we are going to generate an ANYOF node. */
- ret = reganode(pRExC_state, ANYOF, 0);
-
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) = 0;
-
- if (UCHARAT(RExC_parse) == '^') { /* Complement of range. */
- RExC_naughty++;
- RExC_parse++;
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) |= ANYOF_INVERT;
- }
-
- if (SIZE_ONLY) {
- RExC_size += ANYOF_SKIP;
- listsv = &PL_sv_undef; /* For code scanners: listsv always non-NULL. */
- }
- else {
- RExC_emit += ANYOF_SKIP;
- if (FOLD)
- ANYOF_FLAGS(ret) |= ANYOF_FOLD;
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_LOCALE;
- ANYOF_BITMAP_ZERO(ret);
- listsv = newSVpvs("# comment\n");
- }
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
-
- if (!SIZE_ONLY && POSIXCC(nextvalue))
- checkposixcc(pRExC_state);
-
- /* allow 1st char to be ] (allowing it to be - is dealt with later) */
- if (UCHARAT(RExC_parse) == ']')
- goto charclassloop;
-
-parseit:
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != ']') {
-
- charclassloop:
-
- namedclass = OOB_NAMEDCLASS; /* initialize as illegal */
-
- if (!range)
- rangebegin = RExC_parse;
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
- if (value == '[' && POSIXCC(nextvalue))
- namedclass = regpposixcc(pRExC_state, value);
- else if (value == '\\') {
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
- /* Some compilers cannot handle switching on 64-bit integer
- * values, therefore value cannot be an UV. Yes, this will
- * be a problem later if we want switch on Unicode.
- * A similar issue a little bit later when switching on
- * namedclass. --jhi */
- switch ((I32)value) {
- case 'w': namedclass = ANYOF_ALNUM; break;
- case 'W': namedclass = ANYOF_NALNUM; break;
- case 's': namedclass = ANYOF_SPACE; break;
- case 'S': namedclass = ANYOF_NSPACE; break;
- case 'd': namedclass = ANYOF_DIGIT; break;
- case 'D': namedclass = ANYOF_NDIGIT; break;
- case 'v': namedclass = ANYOF_VERTWS; break;
- case 'V': namedclass = ANYOF_NVERTWS; break;
- case 'h': namedclass = ANYOF_HORIZWS; break;
- case 'H': namedclass = ANYOF_NHORIZWS; break;
- case 'N': /* Handle \N{NAME} in class */
- {
- /* We only pay attention to the first char of
- multichar strings being returned. I kinda wonder
- if this makes sense as it does change the behaviour
- from earlier versions, OTOH that behaviour was broken
- as well. */
- UV v; /* value is register so we cant & it /grrr */
- if (reg_namedseq(pRExC_state, &v, NULL)) {
- goto parseit;
- }
- value= v;
- }
- break;
- case 'p':
- case 'P':
- {
- char *e;
- if (RExC_parse >= RExC_end)
- vFAIL2("Empty \\%c{}", (U8)value);
- if (*RExC_parse == '{') {
- const U8 c = (U8)value;
- e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL2("Missing right brace on \\%c{}", c);
- while (isSPACE(UCHARAT(RExC_parse)))
- RExC_parse++;
- if (e == RExC_parse)
- vFAIL2("Empty \\%c{}", c);
- n = e - RExC_parse;
- while (isSPACE(UCHARAT(RExC_parse + n - 1)))
- n--;
- }
- else {
- e = RExC_parse;
- n = 1;
- }
- if (!SIZE_ONLY) {
- if (UCHARAT(RExC_parse) == '^') {
- RExC_parse++;
- n--;
- value = value == 'p' ? 'P' : 'p'; /* toggle */
- while (isSPACE(UCHARAT(RExC_parse))) {
- RExC_parse++;
- n--;
- }
- }
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::%.*s\n",
- (value=='p' ? '+' : '!'), (int)n, RExC_parse);
- }
- RExC_parse = e + 1;
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- namedclass = ANYOF_MAX; /* no official name, but it's named */
- }
- break;
- case 'n': value = '\n'; break;
- case 'r': value = '\r'; break;
- case 't': value = '\t'; break;
- case 'f': value = '\f'; break;
- case 'b': value = '\b'; break;
- case 'e': value = ASCII_TO_NATIVE('\033');break;
- case 'a': value = ASCII_TO_NATIVE('\007');break;
- case 'x':
- if (*RExC_parse == '{') {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- char * const e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL("Missing right brace on \\x{}");
-
- numlen = e - RExC_parse;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse = e + 1;
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- numlen = 2;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- }
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- value = UCHARAT(RExC_parse++);
- value = toCTRL(value);
- break;
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 flags = 0;
- numlen = 3;
- value = grok_oct(--RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- }
- recode_encoding:
- {
- SV* enc = PL_encoding;
- value = reg_recode((const char)(U8)value, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(RExC_parse,
- "Invalid escape in the specified encoding");
- break;
- }
- default:
- if (!SIZE_ONLY && isALPHA(value))
- ckWARN2reg(RExC_parse,
- "Unrecognized escape \\%c in character class passed through",
- (int)value);
- break;
- }
- } /* end of \blah */
-#ifdef EBCDIC
- else
- literal_endpoint++;
-#endif
-
- if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */
-
- if (!SIZE_ONLY && !need_class)
- ANYOF_CLASS_ZERO(ret);
-
- need_class = 1;
-
- /* a bad range like a-\d, a-[:digit:] ? */
- if (range) {
- if (!SIZE_ONLY) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- ckWARN4reg(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
-
- if (prevvalue < 256) {
- ANYOF_BITMAP_SET(ret, prevvalue);
- ANYOF_BITMAP_SET(ret, '-');
- }
- else {
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-');
- }
- }
-
- range = 0; /* this was not a true range */
- }
-
-
-
- if (!SIZE_ONLY) {
- const char *what = NULL;
- char yesno = 0;
-
- if (namedclass > OOB_NAMEDCLASS)
- optimize_invert = FALSE;
- /* Possible truncation here but in some 64-bit environments
- * the compiler gets heartburn about switch on 64-bit values.
- * A similar issue a little earlier when switching on value.
- * --jhi */
- switch ((I32)namedclass) {
-
- case _C_C_T_(ALNUMC, isALNUMC(value), POSIX_CC_UNI_NAME("Alnum"));
- case _C_C_T_(ALPHA, isALPHA(value), POSIX_CC_UNI_NAME("Alpha"));
- case _C_C_T_(BLANK, isBLANK(value), POSIX_CC_UNI_NAME("Blank"));
- case _C_C_T_(CNTRL, isCNTRL(value), POSIX_CC_UNI_NAME("Cntrl"));
- case _C_C_T_(GRAPH, isGRAPH(value), POSIX_CC_UNI_NAME("Graph"));
- case _C_C_T_(LOWER, isLOWER(value), POSIX_CC_UNI_NAME("Lower"));
- case _C_C_T_(PRINT, isPRINT(value), POSIX_CC_UNI_NAME("Print"));
- case _C_C_T_(PSXSPC, isPSXSPC(value), POSIX_CC_UNI_NAME("Space"));
- case _C_C_T_(PUNCT, isPUNCT(value), POSIX_CC_UNI_NAME("Punct"));
- case _C_C_T_(UPPER, isUPPER(value), POSIX_CC_UNI_NAME("Upper"));
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
- case _C_C_T_(ALNUM, isALNUM(value), "Word");
- case _C_C_T_(SPACE, isSPACE(value), "SpacePerl");
-#else
- case _C_C_T_(SPACE, isSPACE(value), "PerlSpace");
- case _C_C_T_(ALNUM, isALNUM(value), "PerlWord");
-#endif
- case _C_C_T_(XDIGIT, isXDIGIT(value), "XDigit");
- case _C_C_T_NOLOC_(VERTWS, is_VERTWS_latin1(&value), "VertSpace");
- case _C_C_T_NOLOC_(HORIZWS, is_HORIZWS_latin1(&value), "HorizSpace");
- case ANYOF_ASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_ASCII);
- else {
-#ifndef EBCDIC
- for (value = 0; value < 128; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '+';
- what = "ASCII";
- break;
- case ANYOF_NASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NASCII);
- else {
-#ifndef EBCDIC
- for (value = 128; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (!isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '!';
- what = "ASCII";
- break;
- case ANYOF_DIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_DIGIT);
- else {
- /* consecutive digits assumed */
- for (value = '0'; value <= '9'; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '+';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_NDIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NDIGIT);
- else {
- /* consecutive digits assumed */
- for (value = 0; value < '0'; value++)
- ANYOF_BITMAP_SET(ret, value);
- for (value = '9' + 1; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '!';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_MAX:
- /* this is to handle \p and \P */
- break;
- default:
- vFAIL("Invalid [::] class");
- break;
- }
- if (what) {
- /* Strings such as "+utf8::isWord\n" */
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::Is%s\n", yesno, what);
- }
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_CLASS;
- continue;
- }
- } /* end of namedclass \blah */
-
- if (range) {
- if (prevvalue > (IV)value) /* b-a */ {
- const int w = RExC_parse - rangebegin;
- Simple_vFAIL4("Invalid [] range \"%*.*s\"", w, w, rangebegin);
- range = 0; /* not a valid range */
- }
- }
- else {
- prevvalue = value; /* save the beginning of the range */
- if (*RExC_parse == '-' && RExC_parse+1 < RExC_end &&
- RExC_parse[1] != ']') {
- RExC_parse++;
-
- /* a bad range like \w-, [:word:]- ? */
- if (namedclass > OOB_NAMEDCLASS) {
- if (ckWARN(WARN_REGEXP)) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- vWARN4(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
- }
- if (!SIZE_ONLY)
- ANYOF_BITMAP_SET(ret, '-');
- } else
- range = 1; /* yeah, it's a range! */
- continue; /* but do it the next time */
- }
- }
-
- /* now is the next time */
- /*stored += (value - prevvalue + 1);*/
- if (!SIZE_ONLY) {
- if (prevvalue < 256) {
- const IV ceilvalue = value < 256 ? value : 255;
- IV i;
-#ifdef EBCDIC
- /* In EBCDIC [\x89-\x91] should include
- * the \x8e but [i-j] should not. */
- if (literal_endpoint == 2 &&
- ((isLOWER(prevvalue) && isLOWER(ceilvalue)) ||
- (isUPPER(prevvalue) && isUPPER(ceilvalue))))
- {
- if (isLOWER(prevvalue)) {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isLOWER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- } else {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isUPPER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- else
-#endif
- for (i = prevvalue; i <= ceilvalue; i++) {
- if (!ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- if (value > 255 || UTF) {
- const UV prevnatvalue = NATIVE_TO_UNI(prevvalue);
- const UV natvalue = NATIVE_TO_UNI(value);
- stored+=2; /* can't optimize this class */
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- if (prevnatvalue < natvalue) { /* what about > ? */
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n",
- prevnatvalue, natvalue);
- }
- else if (prevnatvalue == natvalue) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", natvalue);
- if (FOLD) {
- U8 foldbuf[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const UV f = to_uni_fold(natvalue, foldbuf, &foldlen);
-
-#ifdef EBCDIC /* RD t/uni/fold ff and 6b */
- if (RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xDF || f == 0x92)) {
- f = NATIVE_TO_UNI(f);
- }
-#endif
- /* If folding and foldable and a single
- * character, insert also the folded version
- * to the charclass. */
- if (f != value) {
-#ifdef EBCDIC /* RD tunifold ligatures s,t fb05, fb06 */
- if ((RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xA2 &&
- (value == 0xFB05 || value == 0xFB06))) ?
- foldlen == ((STRLEN)UNISKIP(f) - 1) :
- foldlen == (STRLEN)UNISKIP(f) )
-#else
- if (foldlen == (STRLEN)UNISKIP(f))
-#endif
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n", f);
- else {
- /* Any multicharacter foldings
- * require the following transform:
- * [ABCDEF] -> (?:[ABCabcDEFd]|pq|rst)
- * where E folds into "pq" and F folds
- * into "rst", all other characters
- * fold to single characters. We save
- * away these multicharacter foldings,
- * to be later saved as part of the
- * additional "s" data. */
- SV *sv;
-
- if (!unicode_alternate)
- unicode_alternate = newAV();
- sv = newSVpvn_utf8((char*)foldbuf, foldlen,
- TRUE);
- av_push(unicode_alternate, sv);
- }
- }
-
- /* If folding and the value is one of the Greek
- * sigmas insert a few more sigmas to make the
- * folding rules of the sigmas to work right.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (literal or EXACTF cases) are handled
- * during runtime in regexec.c:S_find_byclass(). */
- if (value == UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA);
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- else if (value == UNICODE_GREEK_CAPITAL_LETTER_SIGMA)
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- }
- }
-#ifdef EBCDIC
- literal_endpoint = 0;
-#endif
- }
-
- range = 0; /* this range (if it was one) is done now */
- }
-
- if (need_class) {
- ANYOF_FLAGS(ret) |= ANYOF_LARGE;
- if (SIZE_ONLY)
- RExC_size += ANYOF_CLASS_ADD_SKIP;
- else
- RExC_emit += ANYOF_CLASS_ADD_SKIP;
- }
-
-
- if (SIZE_ONLY)
- return ret;
- /****** !SIZE_ONLY AFTER HERE *********/
-
- if( stored == 1 && (value < 128 || (value < 256 && !UTF))
- && !( ANYOF_FLAGS(ret) & ( ANYOF_FLAGS_ALL ^ ANYOF_FOLD ) )
- ) {
- /* optimize single char class to an EXACT node
- but *only* when its not a UTF/high char */
- const char * cur_parse= RExC_parse;
- RExC_emit = (regnode *)orig_emit;
- RExC_parse = (char *)orig_parse;
- ret = reg_node(pRExC_state,
- (U8)((ANYOF_FLAGS(ret) & ANYOF_FOLD) ? EXACTF : EXACT));
- RExC_parse = (char *)cur_parse;
- *STRING(ret)= (char)value;
- STR_LEN(ret)= 1;
- RExC_emit += STR_SZ(1);
- if (listsv) {
- SvREFCNT_dec(listsv);
- }
- return ret;
- }
- /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */
- if ( /* If the only flag is folding (plus possibly inversion). */
- ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD)
- ) {
- for (value = 0; value < 256; ++value) {
- if (ANYOF_BITMAP_TEST(ret, value)) {
- UV fold = PL_fold[value];
-
- if (fold != value)
- ANYOF_BITMAP_SET(ret, fold);
- }
- }
- ANYOF_FLAGS(ret) &= ~ANYOF_FOLD;
- }
-
- /* optimize inverted simple patterns (e.g. [^a-z]) */
- if (optimize_invert &&
- /* If the only flag is inversion. */
- (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) {
- for (value = 0; value < ANYOF_BITMAP_SIZE; ++value)
- ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL;
- ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL;
- }
- {
- AV * const av = newAV();
- SV *rv;
- /* The 0th element stores the character class description
- * in its textual form: used later (regexec.c:Perl_regclass_swash())
- * to initialize the appropriate swash (which gets stored in
- * the 1st element), and also useful for dumping the regnode.
- * The 2nd element stores the multicharacter foldings,
- * used later (regexec.c:S_reginclass()). */
- av_store(av, 0, listsv);
- av_store(av, 1, NULL);
- av_store(av, 2, MUTABLE_SV(unicode_alternate));
- rv = newRV_noinc(MUTABLE_SV(av));
- n = add_data(pRExC_state, 1, "s");
- RExC_rxi->data->data[n] = (void*)rv;
- ARG_SET(ret, n);
- }
- return ret;
-}
-#undef _C_C_T_
-
-
-/* reg_skipcomment()
-
- Absorbs an /x style # comments from the input stream.
- Returns true if there is more text remaining in the stream.
- Will set the REG_SEEN_RUN_ON_COMMENT flag if the comment
- terminates the pattern without including a newline.
-
- Note its the callers responsibility to ensure that we are
- actually in /x mode
-
-*/
-
-STATIC bool
-S_reg_skipcomment(pTHX_ RExC_state_t *pRExC_state)
-{
- bool ended = 0;
-
- PERL_ARGS_ASSERT_REG_SKIPCOMMENT;
-
- while (RExC_parse < RExC_end)
- if (*RExC_parse++ == '\n') {
- ended = 1;
- break;
- }
- if (!ended) {
- /* we ran off the end of the pattern without ending
- the comment, so we have to add an \n when wrapping */
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- return 0;
- } else
- return 1;
-}
-
-/* nextchar()
-
- Advance that parse position, and optionall absorbs
- "whitespace" from the inputstream.
-
- Without /x "whitespace" means (?#...) style comments only,
- with /x this means (?#...) and # comments and whitespace proper.
-
- Returns the RExC_parse point from BEFORE the scan occurs.
-
- This is the /x friendly way of saying RExC_parse++.
-*/
-
-STATIC char*
-S_nextchar(pTHX_ RExC_state_t *pRExC_state)
-{
- char* const retval = RExC_parse++;
-
- PERL_ARGS_ASSERT_NEXTCHAR;
-
- for (;;) {
- if (*RExC_parse == '(' && RExC_parse[1] == '?' &&
- RExC_parse[2] == '#') {
- while (*RExC_parse != ')') {
- if (RExC_parse == RExC_end)
- FAIL("Sequence (?#... not terminated");
- RExC_parse++;
- }
- RExC_parse++;
- continue;
- }
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if (isSPACE(*RExC_parse)) {
- RExC_parse++;
- continue;
- }
- else if (*RExC_parse == '#') {
- if ( reg_skipcomment( pRExC_state ) )
- continue;
- }
- }
- return retval;
- }
-}
-
-/*
-- reg_node - emit a node
-*/
-STATIC regnode * /* Location. */
-S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 1;
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE(ptr, op);
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, (ptr) - 1);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s:%d: (op %s) %s %"UVuf" (len %"UVuf") (max %"UVuf").\n",
- "reg_node", __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(RExC_emit, RExC_parse + (op == END));
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reganode - emit a node with an argument
-*/
-STATIC regnode * /* Location. */
-S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGANODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 2;
- /*
- We can't do this:
-
- assert(2==regarglen[op]+1);
-
- Anything larger than this has to allocate the extra amount.
- If we changed this to be:
-
- RExC_size += (1 + regarglen[op]);
-
- then it wouldn't matter. Its not clear what side effect
- might come from that so its not done so far.
- -- dmq
- */
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE_ARG(ptr, op, arg);
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, (ptr) - 2);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reganode",
- __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] ?
- "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Cur_Node_Offset;
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reguni - emit (if appropriate) a Unicode character
-*/
-STATIC STRLEN
-S_reguni(pTHX_ const RExC_state_t *pRExC_state, UV uv, char* s)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGUNI;
-
- return SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s);
-}
-
-/*
-- reginsert - insert an operator in front of already-emitted operand
-*
-* Means relocating the operand.
-*/
-STATIC void
-S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd, U32 depth)
-{
- dVAR;
- register regnode *src;
- register regnode *dst;
- register regnode *place;
- const int offset = regarglen[(U8)op];
- const int size = NODE_STEP_REGNODE + offset;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGINSERT;
- PERL_UNUSED_ARG(depth);
-/* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */
- DEBUG_PARSE_FMT("inst"," - %s",PL_reg_name[op]);
- if (SIZE_ONLY) {
- RExC_size += size;
- return;
- }
-
- src = RExC_emit;
- RExC_emit += size;
- dst = RExC_emit;
- if (RExC_open_parens) {
- int paren;
- /*DEBUG_PARSE_FMT("inst"," - %"IVdf, (IV)RExC_npar);*/
- for ( paren=0 ; paren < RExC_npar ; paren++ ) {
- if ( RExC_open_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("open"," - %d",size);*/
- RExC_open_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("open"," - %s","ok");*/
- }
- if ( RExC_close_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("close"," - %d",size);*/
- RExC_close_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("close"," - %s","ok");*/
- }
- }
- }
-
- while (src > opnd) {
- StructCopy(--src, --dst, regnode);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD 20010112 */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s copy %"UVuf" -> %"UVuf" (max %"UVuf").\n",
- "reg_insert",
- __LINE__,
- PL_reg_name[op],
- (UV)(dst - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(src - RExC_emit_start),
- (UV)(dst - RExC_emit_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src));
- Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src));
- }
-#endif
- }
-
-
- place = opnd; /* Op node, where operand used to be. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reginsert",
- __LINE__,
- PL_reg_name[op],
- (UV)(place - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(place - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(place, RExC_parse);
- Set_Node_Length(place, 1);
- }
-#endif
- src = NEXTOPER(place);
- FILL_ADVANCE_NODE(place, op);
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, (place) - 1);
- Zero(src, offset, regnode);
-}
-
-/*
-- regtail - set the next-pointer at the end of a node chain of p to val.
-- SEE ALSO: regtail_study
-*/
-/* TODO: All three parms should be const */
-STATIC void
-S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- if (SIZE_ONLY)
- return;
-
- /* Find last node. */
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tail" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) %s %s\n",
- SvPV_nolen_const(mysv), REG_NODE_NUM(scan),
- (temp == NULL ? "->" : ""),
- (temp == NULL ? PL_reg_name[OP(val)] : "")
- );
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
-
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-}
-
-#ifdef DEBUGGING
-/*
-- regtail_study - set the next-pointer at the end of a node chain of p to val.
-- Look for optimizable sequences at the same time.
-- currently only looks for EXACT chains.
-
-This is expermental code. The idea is to use this routine to perform
-in place optimizations on branches and groups as they are constructed,
-with the long term intention of removing optimization from study_chunk so
-that it is purely analytical.
-
-Currently only used when in DEBUG mode. The macro REGTAIL_STUDY() is used
-to control which is which.
-
-*/
-/* TODO: All four parms should be const */
-
-STATIC U8
-S_regtail_study(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- U8 exact = PSEUDO;
-#ifdef EXPERIMENTAL_INPLACESCAN
- I32 min = 0;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL_STUDY;
-
-
- if (SIZE_ONLY)
- return exact;
-
- /* Find last node. */
-
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (PL_regkind[OP(scan)] == EXACT)
- if (join_exact(pRExC_state,scan,&min,1,val,depth+1))
- return EXACT;
-#endif
- if ( exact ) {
- switch (OP(scan)) {
- case EXACT:
- case EXACTF:
- case EXACTFL:
- if( exact == PSEUDO )
- exact= OP(scan);
- else if ( exact != OP(scan) )
- exact= 0;
- case NOTHING:
- break;
- default:
- exact= 0;
- }
- }
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tsdy" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) -> %s\n",
- SvPV_nolen_const(mysv),
- REG_NODE_NUM(scan),
- PL_reg_name[exact]);
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
- DEBUG_PARSE_r({
- SV * const mysv_val=sv_newmortal();
- DEBUG_PARSE_MSG("");
- regprop(RExC_rx, mysv_val, val);
- PerlIO_printf(Perl_debug_log, "~ attach to %s (%"IVdf") offset to %"IVdf"\n",
- SvPV_nolen_const(mysv_val),
- (IV)REG_NODE_NUM(val),
- (IV)(val - scan)
- );
- });
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-
- return exact;
-}
-#endif
-
-/*
- - regcurly - a little FSA that accepts {\d+,?\d*}
- */
-STATIC I32
-S_regcurly(register const char *s)
-{
- PERL_ARGS_ASSERT_REGCURLY;
-
- if (*s++ != '{')
- return FALSE;
- if (!isDIGIT(*s))
- return FALSE;
- while (isDIGIT(*s))
- s++;
- if (*s == ',')
- s++;
- while (isDIGIT(*s))
- s++;
- if (*s != '}')
- return FALSE;
- return TRUE;
-}
-
-
-/*
- - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form
- */
-#ifdef DEBUGGING
-static void
-S_regdump_extflags(pTHX_ const char *lead, const U32 flags)
-{
- int bit;
- int set=0;
-
- for (bit=0; bit<32; bit++) {
- if (flags & (1<<bit)) {
- if (!set++ && lead)
- PerlIO_printf(Perl_debug_log, "%s",lead);
- PerlIO_printf(Perl_debug_log, "%s ",PL_reg_extflags_name[bit]);
- }
- }
- if (lead) {
- if (set)
- PerlIO_printf(Perl_debug_log, "\n");
- else
- PerlIO_printf(Perl_debug_log, "%s[none-set]\n",lead);
- }
-}
-#endif
-
-void
-Perl_regdump(pTHX_ const regexp *r)
-{
-#ifdef DEBUGGING
- dVAR;
- SV * const sv = sv_newmortal();
- SV *dsv= sv_newmortal();
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGDUMP;
-
- (void)dumpuntil(r, ri->program, ri->program + 1, NULL, NULL, sv, 0, 0);
-
- /* Header fields of interest. */
- if (r->anchored_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->anchored_substr),
- RE_SV_DUMPLEN(r->anchored_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_substr),
- (IV)r->anchored_offset);
- } else if (r->anchored_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->anchored_utf8),
- RE_SV_DUMPLEN(r->anchored_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored utf8 %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_utf8),
- (IV)r->anchored_offset);
- }
- if (r->float_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->float_substr),
- RE_SV_DUMPLEN(r->float_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "floating %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_substr),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- } else if (r->float_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->float_utf8),
- RE_SV_DUMPLEN(r->float_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "floating utf8 %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_utf8),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- }
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log,
- (const char *)
- (r->check_substr == r->float_substr
- && r->check_utf8 == r->float_utf8
- ? "(checking floating" : "(checking anchored"));
- if (r->extflags & RXf_NOSCAN)
- PerlIO_printf(Perl_debug_log, " noscan");
- if (r->extflags & RXf_CHECK_ALL)
- PerlIO_printf(Perl_debug_log, " isall");
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log, ") ");
-
- if (ri->regstclass) {
- regprop(r, sv, ri->regstclass);
- PerlIO_printf(Perl_debug_log, "stclass %s ", SvPVX_const(sv));
- }
- if (r->extflags & RXf_ANCH) {
- PerlIO_printf(Perl_debug_log, "anchored");
- if (r->extflags & RXf_ANCH_BOL)
- PerlIO_printf(Perl_debug_log, "(BOL)");
- if (r->extflags & RXf_ANCH_MBOL)
- PerlIO_printf(Perl_debug_log, "(MBOL)");
- if (r->extflags & RXf_ANCH_SBOL)
- PerlIO_printf(Perl_debug_log, "(SBOL)");
- if (r->extflags & RXf_ANCH_GPOS)
- PerlIO_printf(Perl_debug_log, "(GPOS)");
- PerlIO_putc(Perl_debug_log, ' ');
- }
- if (r->extflags & RXf_GPOS_SEEN)
- PerlIO_printf(Perl_debug_log, "GPOS:%"UVuf" ", (UV)r->gofs);
- if (r->intflags & PREGf_SKIP)
- PerlIO_printf(Perl_debug_log, "plus ");
- if (r->intflags & PREGf_IMPLICIT)
- PerlIO_printf(Perl_debug_log, "implicit ");
- PerlIO_printf(Perl_debug_log, "minlen %"IVdf" ", (IV)r->minlen);
- if (r->extflags & RXf_EVAL_SEEN)
- PerlIO_printf(Perl_debug_log, "with eval ");
- PerlIO_printf(Perl_debug_log, "\n");
- DEBUG_FLAGS_r(regdump_extflags("r->extflags: ",r->extflags));
-#else
- PERL_ARGS_ASSERT_REGDUMP;
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(r);
-#endif /* DEBUGGING */
-}
-
-/*
-- regprop - printable representation of opcode
-*/
-#define EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags) \
-STMT_START { \
- if (do_sep) { \
- Perl_sv_catpvf(aTHX_ sv,"%s][%s",PL_colors[1],PL_colors[0]); \
- if (flags & ANYOF_INVERT) \
- /*make sure the invert info is in each */ \
- sv_catpvs(sv, "^"); \
- do_sep = 0; \
- } \
-} STMT_END
-
-void
-Perl_regprop(pTHX_ const regexp *prog, SV *sv, const regnode *o)
-{
-#ifdef DEBUGGING
- dVAR;
- register int k;
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPROP;
-
- sv_setpvs(sv, "");
-
- if (OP(o) > REGNODE_MAX) /* regnode.type is unsigned */
- /* It would be nice to FAIL() here, but this may be called from
- regexec.c, and it would be hard to supply pRExC_state. */
- Perl_croak(aTHX_ "Corrupted regexp opcode %d > %d", (int)OP(o), (int)REGNODE_MAX);
- sv_catpv(sv, PL_reg_name[OP(o)]); /* Take off const! */
-
- k = PL_regkind[OP(o)];
-
- if (k == EXACT) {
- sv_catpvs(sv, " ");
- /* Using is_utf8_string() (via PERL_PV_UNI_DETECT)
- * is a crude hack but it may be the best for now since
- * we have no flag "this EXACTish node was UTF-8"
- * --jhi */
- pv_pretty(sv, STRING(o), STR_LEN(o), 60, PL_colors[0], PL_colors[1],
- PERL_PV_ESCAPE_UNI_DETECT |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT |
- PERL_PV_PRETTY_NOCLEAR
- );
- } else if (k == TRIE) {
- /* print the details of the trie in dumpuntil instead, as
- * progi->data isn't available here */
- const char op = OP(o);
- const U32 n = ARG(o);
- const reg_ac_data * const ac = IS_TRIE_AC(op) ?
- (reg_ac_data *)progi->data->data[n] :
- NULL;
- const reg_trie_data * const trie
- = (reg_trie_data*)progi->data->data[!IS_TRIE_AC(op) ? n : ac->trie];
-
- Perl_sv_catpvf(aTHX_ sv, "-%s",PL_reg_name[o->flags]);
- DEBUG_TRIE_COMPILE_r(
- Perl_sv_catpvf(aTHX_ sv,
- "<S:%"UVuf"/%"IVdf" W:%"UVuf" L:%"UVuf"/%"UVuf" C:%"UVuf"/%"UVuf">",
- (UV)trie->startstate,
- (IV)trie->statecount-1, /* -1 because of the unused 0 element */
- (UV)trie->wordcount,
- (UV)trie->minlen,
- (UV)trie->maxlen,
- (UV)TRIE_CHARCOUNT(trie),
- (UV)trie->uniquecharcount
- )
- );
- if ( IS_ANYOF_TRIE(op) || trie->bitmap ) {
- int i;
- int rangestart = -1;
- U8* bitmap = IS_ANYOF_TRIE(op) ? (U8*)ANYOF_BITMAP(o) : (U8*)TRIE_BITMAP(trie);
- sv_catpvs(sv, "[");
- for (i = 0; i <= 256; i++) {
- if (i < 256 && BITMAP_TEST(bitmap,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- rangestart = -1;
- }
- }
- sv_catpvs(sv, "]");
- }
-
- } else if (k == CURLY) {
- if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */
- Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o));
- }
- else if (k == WHILEM && o->flags) /* Ordinal/of */
- Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4);
- else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP || OP(o)==ACCEPT) {
- Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */
- if ( RXp_PAREN_NAMES(prog) ) {
- if ( k != REF || OP(o) < NREF) {
- AV *list= MUTABLE_AV(progi->data->data[progi->name_list_idx]);
- SV **name= av_fetch(list, ARG(o), 0 );
- if (name)
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- else {
- AV *list= MUTABLE_AV(progi->data->data[ progi->name_list_idx ]);
- SV *sv_dat= MUTABLE_SV(progi->data->data[ ARG( o ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
- SV **name= av_fetch(list, nums[0], 0 );
- I32 n;
- if (name) {
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- Perl_sv_catpvf(aTHX_ sv, "%s%"IVdf,
- (n ? "," : ""), (IV)nums[n]);
- }
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- }
- }
- } else if (k == GOSUB)
- Perl_sv_catpvf(aTHX_ sv, "%d[%+d]", (int)ARG(o),(int)ARG2L(o)); /* Paren and offset */
- else if (k == VERB) {
- if (!o->flags)
- Perl_sv_catpvf(aTHX_ sv, ":%"SVf,
- SVfARG((MUTABLE_SV(progi->data->data[ ARG( o ) ]))));
- } else if (k == LOGICAL)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */
- else if (k == FOLDCHAR)
- Perl_sv_catpvf(aTHX_ sv, "[0x%"UVXf"]", PTR2UV(ARG(o)) );
- else if (k == ANYOF) {
- int i, rangestart = -1;
- const U8 flags = ANYOF_FLAGS(o);
- int do_sep = 0;
-
- /* Should be synchronized with * ANYOF_ #xdefines in regcomp.h */
- static const char * const anyofs[] = {
- "\\w",
- "\\W",
- "\\s",
- "\\S",
- "\\d",
- "\\D",
- "[:alnum:]",
- "[:^alnum:]",
- "[:alpha:]",
- "[:^alpha:]",
- "[:ascii:]",
- "[:^ascii:]",
- "[:cntrl:]",
- "[:^cntrl:]",
- "[:graph:]",
- "[:^graph:]",
- "[:lower:]",
- "[:^lower:]",
- "[:print:]",
- "[:^print:]",
- "[:punct:]",
- "[:^punct:]",
- "[:upper:]",
- "[:^upper:]",
- "[:xdigit:]",
- "[:^xdigit:]",
- "[:space:]",
- "[:^space:]",
- "[:blank:]",
- "[:^blank:]"
- };
-
- if (flags & ANYOF_LOCALE)
- sv_catpvs(sv, "{loc}");
- if (flags & ANYOF_FOLD)
- sv_catpvs(sv, "{i}");
- Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]);
- if (flags & ANYOF_INVERT)
- sv_catpvs(sv, "^");
-
- /* output what the standard cp 0-255 bitmap matches */
- for (i = 0; i <= 256; i++) {
- if (i < 256 && ANYOF_BITMAP_TEST(o,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- do_sep = 1;
- rangestart = -1;
- }
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
- /* output any special charclass tests (used mostly under use locale) */
- if (o->flags & ANYOF_CLASS)
- for (i = 0; i < (int)(sizeof(anyofs)/sizeof(char*)); i++)
- if (ANYOF_CLASS_TEST(o,i)) {
- sv_catpv(sv, anyofs[i]);
- do_sep = 1;
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
-
- /* output information about the unicode matching */
- if (flags & ANYOF_UNICODE)
- sv_catpvs(sv, "{unicode}");
- else if (flags & ANYOF_UNICODE_ALL)
- sv_catpvs(sv, "{unicode_all}");
-
- {
- SV *lv;
- SV * const sw = regclass_swash(prog, o, FALSE, &lv, 0);
-
- if (lv) {
- if (sw) {
- U8 s[UTF8_MAXBYTES_CASE+1];
-
- for (i = 0; i <= 256; i++) { /* just the first 256 */
- uvchr_to_utf8(s, i);
-
- if (i < 256 && swash_fetch(sw, s, TRUE)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++) {
- const U8 * const e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for(p = s; p < e; p++)
- put_byte(sv, *p);
- }
- else {
- const U8 *e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- sv_catpvs(sv, "-");
- e = uvchr_to_utf8(s, i-1);
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- }
- rangestart = -1;
- }
- }
-
- sv_catpvs(sv, "..."); /* et cetera */
- }
-
- {
- char *s = savesvpv(lv);
- char * const origs = s;
-
- while (*s && *s != '\n')
- s++;
-
- if (*s == '\n') {
- const char * const t = ++s;
-
- while (*s) {
- if (*s == '\n')
- *s = ' ';
- s++;
- }
- if (s[-1] == ' ')
- s[-1] = 0;
-
- sv_catpv(sv, t);
- }
-
- Safefree(origs);
- }
- }
- }
-
- Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]);
- }
- else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH))
- Perl_sv_catpvf(aTHX_ sv, "[%d]", -(o->flags));
-#else
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(sv);
- PERL_UNUSED_ARG(o);
- PERL_UNUSED_ARG(prog);
-#endif /* DEBUGGING */
-}
-
-SV *
-Perl_re_intuit_string(pTHX_ REGEXP * const r)
-{ /* Assume that RE_INTUIT is set */
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_STRING;
- PERL_UNUSED_CONTEXT;
-
- DEBUG_COMPILE_r(
- {
- const char * const s = SvPV_nolen_const(prog->check_substr
- ? prog->check_substr : prog->check_utf8);
-
- if (!PL_colorset) reginitcolors();
- PerlIO_printf(Perl_debug_log,
- "%sUsing REx %ssubstr:%s \"%s%.60s%s%s\"\n",
- PL_colors[4],
- prog->check_substr ? "" : "utf8 ",
- PL_colors[5],PL_colors[0],
- s,
- PL_colors[1],
- (strlen(s) > 60 ? "..." : ""));
- } );
-
- return prog->check_substr ? prog->check_substr : prog->check_utf8;
-}
-
-/*
- pregfree()
-
- handles refcounting and freeing the perl core regexp structure. When
- it is necessary to actually free the structure the first thing it
- does is call the 'free' method of the regexp_engine associated to to
- the regexp, allowing the handling of the void *pprivate; member
- first. (This routine is not overridable by extensions, which is why
- the extensions free is called first.)
-
- See regdupe and regdupe_internal if you change anything here.
-*/
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_pregfree(pTHX_ REGEXP *r)
-{
- SvREFCNT_dec(r);
-}
-
-void
-Perl_pregfree2(pTHX_ REGEXP *rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_PREGFREE2;
-
- if (r->mother_re) {
- ReREFCNT_dec(r->mother_re);
- } else {
- CALLREGFREE_PVT(rx); /* free the private data */
- if (RXp_PAREN_NAMES(r))
- SvREFCNT_dec(RXp_PAREN_NAMES(r));
- }
- if (r->substrs) {
- if (r->anchored_substr)
- SvREFCNT_dec(r->anchored_substr);
- if (r->anchored_utf8)
- SvREFCNT_dec(r->anchored_utf8);
- if (r->float_substr)
- SvREFCNT_dec(r->float_substr);
- if (r->float_utf8)
- SvREFCNT_dec(r->float_utf8);
- Safefree(r->substrs);
- }
- RX_MATCH_COPY_FREE(rx);
-#ifdef PERL_OLD_COPY_ON_WRITE
- if (r->saved_copy)
- SvREFCNT_dec(r->saved_copy);
-#endif
- Safefree(r->offs);
-}
-
-/* reg_temp_copy()
-
- This is a hacky workaround to the structural issue of match results
- being stored in the regexp structure which is in turn stored in
- PL_curpm/PL_reg_curpm. The problem is that due to qr// the pattern
- could be PL_curpm in multiple contexts, and could require multiple
- result sets being associated with the pattern simultaneously, such
- as when doing a recursive match with (??{$qr})
-
- The solution is to make a lightweight copy of the regexp structure
- when a qr// is returned from the code executed by (??{$qr}) this
- lightweight copy doesnt actually own any of its data except for
- the starp/end and the actual regexp structure itself.
-
-*/
-
-
-REGEXP *
-Perl_reg_temp_copy (pTHX_ REGEXP *rx)
-{
- REGEXP *ret_x = (REGEXP*) newSV_type(SVt_REGEXP);
- struct regexp *ret = (struct regexp *)SvANY(ret_x);
- struct regexp *const r = (struct regexp *)SvANY(rx);
- register const I32 npar = r->nparens+1;
-
- PERL_ARGS_ASSERT_REG_TEMP_COPY;
-
- (void)ReREFCNT_inc(rx);
- /* We can take advantage of the existing "copied buffer" mechanism in SVs
- by pointing directly at the buffer, but flagging that the allocated
- space in the copy is zero. As we've just done a struct copy, it's now
- a case of zero-ing that, rather than copying the current length. */
- SvPV_set(ret_x, RX_WRAPPED(rx));
- SvFLAGS(ret_x) |= SvFLAGS(rx) & (SVf_POK|SVp_POK|SVf_UTF8);
- memcpy(&(ret->xpv_cur), &(r->xpv_cur),
- sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur));
- SvLEN_set(ret_x, 0);
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if (r->substrs) {
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- SvREFCNT_inc_void(ret->anchored_substr);
- SvREFCNT_inc_void(ret->anchored_utf8);
- SvREFCNT_inc_void(ret->float_substr);
- SvREFCNT_inc_void(ret->float_utf8);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
- }
- RX_MATCH_COPIED_off(ret_x);
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
- ret->mother_re = rx;
-
- return ret_x;
-}
-#endif
-
-/* regfree_internal()
-
- Free the private data in a regexp. This is overloadable by
- extensions. Perl takes care of the regexp structure in pregfree(),
- this covers the *pprivate pointer which technically perldoesnt
- know about, however of course we have to handle the
- regexp_internal structure when no extension is in use.
-
- Note this is called before freeing anything in the regexp
- structure.
- */
-
-void
-Perl_regfree_internal(pTHX_ REGEXP * const rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGFREE_INTERNAL;
-
- DEBUG_COMPILE_r({
- if (!PL_colorset)
- reginitcolors();
- {
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RX_UTF8(rx),
- dsv, RX_PRECOMP(rx), RX_PRELEN(rx), 60);
- PerlIO_printf(Perl_debug_log,"%sFreeing REx:%s %s\n",
- PL_colors[4],PL_colors[5],s);
- }
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets)
- Safefree(ri->u.offsets); /* 20010421 MJD */
-#endif
- if (ri->data) {
- int n = ri->data->count;
- PAD* new_comppad = NULL;
- PAD* old_comppad;
- PADOFFSET refcnt;
-
- while (--n >= 0) {
- /* If you add a ->what type here, update the comment in regcomp.h */
- switch (ri->data->what[n]) {
- case 's':
- case 'S':
- case 'u':
- SvREFCNT_dec(MUTABLE_SV(ri->data->data[n]));
- break;
- case 'f':
- Safefree(ri->data->data[n]);
- break;
- case 'p':
- new_comppad = MUTABLE_AV(ri->data->data[n]);
- break;
- case 'o':
- if (new_comppad == NULL)
- Perl_croak(aTHX_ "panic: pregfree comppad");
- PAD_SAVE_LOCAL(old_comppad,
- /* Watch out for global destruction's random ordering. */
- (SvTYPE(new_comppad) == SVt_PVAV) ? new_comppad : NULL
- );
- OP_REFCNT_LOCK;
- refcnt = OpREFCNT_dec((OP_4tree*)ri->data->data[n]);
- OP_REFCNT_UNLOCK;
- if (!refcnt)
- op_free((OP_4tree*)ri->data->data[n]);
-
- PAD_RESTORE_LOCAL(old_comppad);
- SvREFCNT_dec(MUTABLE_SV(new_comppad));
- new_comppad = NULL;
- break;
- case 'n':
- break;
- case 'T':
- { /* Aho Corasick add-on structure for a trie node.
- Used in stclass optimization only */
- U32 refcount;
- reg_ac_data *aho=(reg_ac_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --aho->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(aho->states);
- PerlMemShared_free(aho->fail);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- PerlMemShared_free(ri->regstclass);
- }
- }
- break;
- case 't':
- {
- /* trie structure. */
- U32 refcount;
- reg_trie_data *trie=(reg_trie_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --trie->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(trie->charmap);
- PerlMemShared_free(trie->states);
- PerlMemShared_free(trie->trans);
- if (trie->bitmap)
- PerlMemShared_free(trie->bitmap);
- if (trie->wordlen)
- PerlMemShared_free(trie->wordlen);
- if (trie->jump)
- PerlMemShared_free(trie->jump);
- if (trie->nextword)
- PerlMemShared_free(trie->nextword);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- }
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: regfree data code '%c'", ri->data->what[n]);
- }
- }
- Safefree(ri->data->what);
- Safefree(ri->data);
- }
-
- Safefree(ri);
-}
-
-#define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
-#define av_dup_inc(s,t) MUTABLE_AV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define hv_dup_inc(s,t) MUTABLE_HV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define SAVEPVN(p,n) ((p) ? savepvn(p,n) : NULL)
-
-/*
- re_dup - duplicate a regexp.
-
- This routine is expected to clone a given regexp structure. It is only
- compiled under USE_ITHREADS.
-
- After all of the core data stored in struct regexp is duplicated
- the regexp_engine.dupe method is used to copy any private data
- stored in the *pprivate pointer. This allows extensions to handle
- any duplication it needs to do.
-
- See pregfree() and regfree_internal() if you change anything here.
-*/
-#if defined(USE_ITHREADS)
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_re_dup_guts(pTHX_ const REGEXP *sstr, REGEXP *dstr, CLONE_PARAMS *param)
-{
- dVAR;
- I32 npar;
- const struct regexp *r = (const struct regexp *)SvANY(sstr);
- struct regexp *ret = (struct regexp *)SvANY(dstr);
-
- PERL_ARGS_ASSERT_RE_DUP_GUTS;
-
- npar = r->nparens+1;
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if(ret->swap) {
- /* no need to copy these */
- Newx(ret->swap, npar, regexp_paren_pair);
- }
-
- if (ret->substrs) {
- /* Do it this way to avoid reading from *r after the StructCopy().
- That way, if any of the sv_dup_inc()s dislodge *r from the L1
- cache, it doesn't matter. */
- const bool anchored = r->check_substr
- ? r->check_substr == r->anchored_substr
- : r->check_utf8 == r->anchored_utf8;
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- ret->anchored_substr = sv_dup_inc(ret->anchored_substr, param);
- ret->anchored_utf8 = sv_dup_inc(ret->anchored_utf8, param);
- ret->float_substr = sv_dup_inc(ret->float_substr, param);
- ret->float_utf8 = sv_dup_inc(ret->float_utf8, param);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
-
- if (ret->check_substr) {
- if (anchored) {
- assert(r->check_utf8 == r->anchored_utf8);
- ret->check_substr = ret->anchored_substr;
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- assert(r->check_substr == r->float_substr);
- assert(r->check_utf8 == r->float_utf8);
- ret->check_substr = ret->float_substr;
- ret->check_utf8 = ret->float_utf8;
- }
- } else if (ret->check_utf8) {
- if (anchored) {
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- ret->check_utf8 = ret->float_utf8;
- }
- }
- }
-
- RXp_PAREN_NAMES(ret) = hv_dup_inc(RXp_PAREN_NAMES(ret), param);
-
- if (ret->pprivate)
- RXi_SET(ret,CALLREGDUPE_PVT(dstr,param));
-
- if (RX_MATCH_COPIED(dstr))
- ret->subbeg = SAVEPVN(ret->subbeg, ret->sublen);
- else
- ret->subbeg = NULL;
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
-
- ret->mother_re = NULL;
- ret->gofs = 0;
-}
-#endif /* PERL_IN_XSUB_RE */
-
-/*
- regdupe_internal()
-
- This is the internal complement to regdupe() which is used to copy
- the structure pointed to by the *pprivate pointer in the regexp.
- This is the core version of the extension overridable cloning hook.
- The regexp structure being duplicated will be copied by perl prior
- to this and will be provided as the regexp *r argument, however
- with the /old/ structures pprivate pointer value. Thus this routine
- may override any copying normally done by perl.
-
- It returns a pointer to the new regexp_internal structure.
-*/
-
-void *
-Perl_regdupe_internal(pTHX_ REGEXP * const rx, CLONE_PARAMS *param)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- regexp_internal *reti;
- int len, npar;
- RXi_GET_DECL(r,ri);
-
- PERL_ARGS_ASSERT_REGDUPE_INTERNAL;
-
- npar = r->nparens+1;
- len = ProgLen(ri);
-
- Newxc(reti, sizeof(regexp_internal) + len*sizeof(regnode), char, regexp_internal);
- Copy(ri->program, reti->program, len+1, regnode);
-
-
- reti->regstclass = NULL;
-
- if (ri->data) {
- struct reg_data *d;
- const int count = ri->data->count;
- int i;
-
- Newxc(d, sizeof(struct reg_data) + count*sizeof(void *),
- char, struct reg_data);
- Newx(d->what, count, U8);
-
- d->count = count;
- for (i = 0; i < count; i++) {
- d->what[i] = ri->data->what[i];
- switch (d->what[i]) {
- /* legal options are one of: sSfpontTu
- see also regcomp.h and pregfree() */
- case 's':
- case 'S':
- case 'p': /* actually an AV, but the dup function is identical. */
- case 'u': /* actually an HV, but the dup function is identical. */
- d->data[i] = sv_dup_inc((const SV *)ri->data->data[i], param);
- break;
- case 'f':
- /* This is cheating. */
- Newx(d->data[i], 1, struct regnode_charclass_class);
- StructCopy(ri->data->data[i], d->data[i],
- struct regnode_charclass_class);
- reti->regstclass = (regnode*)d->data[i];
- break;
- case 'o':
- /* Compiled op trees are readonly and in shared memory,
- and can thus be shared without duplication. */
- OP_REFCNT_LOCK;
- d->data[i] = (void*)OpREFCNT_inc((OP*)ri->data->data[i]);
- OP_REFCNT_UNLOCK;
- break;
- case 'T':
- /* Trie stclasses are readonly and can thus be shared
- * without duplication. We free the stclass in pregfree
- * when the corresponding reg_ac_data struct is freed.
- */
- reti->regstclass= ri->regstclass;
- /* Fall through */
- case 't':
- OP_REFCNT_LOCK;
- ((reg_trie_data*)ri->data->data[i])->refcount++;
- OP_REFCNT_UNLOCK;
- /* Fall through */
- case 'n':
- d->data[i] = ri->data->data[i];
- break;
- default:
- Perl_croak(aTHX_ "panic: re_dup unknown data code '%c'", ri->data->what[i]);
- }
- }
-
- reti->data = d;
- }
- else
- reti->data = NULL;
-
- reti->name_list_idx = ri->name_list_idx;
-
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets) {
- Newx(reti->u.offsets, 2*len+1, U32);
- Copy(ri->u.offsets, reti->u.offsets, 2*len+1, U32);
- }
-#else
- SetProgLen(reti,len);
-#endif
-
- return (void*)reti;
-}
-
-#endif /* USE_ITHREADS */
-
-#ifndef PERL_IN_XSUB_RE
-
-/*
- - regnext - dig the "next" pointer out of a node
- */
-regnode *
-Perl_regnext(pTHX_ register regnode *p)
-{
- dVAR;
- register I32 offset;
-
- if (!p)
- return(NULL);
-
- offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p));
- if (offset == 0)
- return(NULL);
-
- return(p+offset);
-}
-#endif
-
-STATIC void
-S_re_croak2(pTHX_ const char* pat1,const char* pat2,...)
-{
- va_list args;
- STRLEN l1 = strlen(pat1);
- STRLEN l2 = strlen(pat2);
- char buf[512];
- SV *msv;
- const char *message;
-
- PERL_ARGS_ASSERT_RE_CROAK2;
-
- if (l1 > 510)
- l1 = 510;
- if (l1 + l2 > 510)
- l2 = 510 - l1;
- Copy(pat1, buf, l1 , char);
- Copy(pat2, buf + l1, l2 , char);
- buf[l1 + l2] = '\n';
- buf[l1 + l2 + 1] = '\0';
-#ifdef I_STDARG
- /* ANSI variant takes additional second argument */
- va_start(args, pat2);
-#else
- va_start(args);
-#endif
- msv = vmess(buf, &args);
- va_end(args);
- message = SvPV_const(msv,l1);
- if (l1 > 512)
- l1 = 512;
- Copy(message, buf, l1 , char);
- buf[l1-1] = '\0'; /* Overwrite \n */
- Perl_croak(aTHX_ "%s", buf);
-}
-
-/* XXX Here's a total kludge. But we need to re-enter for swash routines. */
-
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_save_re_context(pTHX)
-{
- dVAR;
-
- struct re_save_state *state;
-
- SAVEVPTR(PL_curcop);
- SSGROW(SAVESTACK_ALLOC_FOR_RE_SAVE_STATE + 1);
-
- state = (struct re_save_state *)(PL_savestack + PL_savestack_ix);
- PL_savestack_ix += SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
- SSPUSHINT(SAVEt_RE_STATE);
-
- Copy(&PL_reg_state, state, 1, struct re_save_state);
-
- PL_reg_start_tmp = 0;
- PL_reg_start_tmpl = 0;
- PL_reg_oldsaved = NULL;
- PL_reg_oldsavedlen = 0;
- PL_reg_maxiter = 0;
- PL_reg_leftiter = 0;
- PL_reg_poscache = NULL;
- PL_reg_poscache_size = 0;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = NULL;
-#endif
-
- /* Save $1..$n (#18107: UTF-8 s/(\w+)/uc($1)/e); AMS 20021106. */
- if (PL_curpm) {
- const REGEXP * const rx = PM_GETRE(PL_curpm);
- if (rx) {
- U32 i;
- for (i = 1; i <= RX_NPARENS(rx); i++) {
- char digits[TYPE_CHARS(long)];
- const STRLEN len = my_snprintf(digits, sizeof(digits), "%lu", (long)i);
- GV *const *const gvp
- = (GV**)hv_fetch(PL_defstash, digits, len, 0);
-
- if (gvp) {
- GV * const gv = *gvp;
- if (SvTYPE(gv) == SVt_PVGV && GvSV(gv))
- save_scalar(gv);
- }
- }
- }
- }
-}
-#endif
-
-static void
-clear_re(pTHX_ void *r)
-{
- dVAR;
- ReREFCNT_dec((REGEXP *)r);
-}
-
-#ifdef DEBUGGING
-
-STATIC void
-S_put_byte(pTHX_ SV *sv, int c)
-{
- PERL_ARGS_ASSERT_PUT_BYTE;
-
- /* Our definition of isPRINT() ignores locales, so only bytes that are
- not part of UTF-8 are considered printable. I assume that the same
- holds for UTF-EBCDIC.
- Also, code point 255 is not printable in either (it's E0 in EBCDIC,
- which Wikipedia says:
-
- EO, or Eight Ones, is an 8-bit EBCDIC character code represented as all
- ones (binary 1111 1111, hexadecimal FF). It is similar, but not
- identical, to the ASCII delete (DEL) or rubout control character.
- ) So the old condition can be simplified to !isPRINT(c) */
- if (!isPRINT(c))
- Perl_sv_catpvf(aTHX_ sv, "\\%o", c);
- else {
- const char string = c;
- if (c == '-' || c == ']' || c == '\\' || c == '^')
- sv_catpvs(sv, "\\");
- sv_catpvn(sv, &string, 1);
- }
-}
-
-
-#define CLEAR_OPTSTART \
- if (optstart) STMT_START { \
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log, " (%"IVdf" nodes)\n", (IV)(node - optstart))); \
- optstart=NULL; \
- } STMT_END
-
-#define DUMPUNTIL(b,e) CLEAR_OPTSTART; node=dumpuntil(r,start,(b),(e),last,sv,indent+1,depth+1);
-
-STATIC const regnode *
-S_dumpuntil(pTHX_ const regexp *r, const regnode *start, const regnode *node,
- const regnode *last, const regnode *plast,
- SV* sv, I32 indent, U32 depth)
-{
- dVAR;
- register U8 op = PSEUDO; /* Arbitrary non-END op. */
- register const regnode *next;
- const regnode *optstart= NULL;
-
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMPUNTIL;
-
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d : %d - %d - %d\n",indent,node-start,
- last ? last-start : 0,plast ? plast-start : 0);
-#endif
-
- if (plast && plast < last)
- last= plast;
-
- while (PL_regkind[op] != END && (!last || node < last)) {
- /* While that wasn't END last time... */
- NODE_ALIGN(node);
- op = OP(node);
- if (op == CLOSE || op == WHILEM)
- indent--;
- next = regnext((regnode *)node);
-
- /* Where, what. */
- if (OP(node) == OPTIMIZED) {
- if (!optstart && RE_DEBUG_FLAG(RE_DEBUG_COMPILE_OPTIMISE))
- optstart = node;
- else
- goto after_print;
- } else
- CLEAR_OPTSTART;
-
- regprop(r, sv, node);
- PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start),
- (int)(2*indent + 1), "", SvPVX_const(sv));
-
- if (OP(node) != OPTIMIZED) {
- if (next == NULL) /* Next ptr. */
- PerlIO_printf(Perl_debug_log, " (0)");
- else if (PL_regkind[(U8)op] == BRANCH && PL_regkind[OP(next)] != BRANCH )
- PerlIO_printf(Perl_debug_log, " (FAIL)");
- else
- PerlIO_printf(Perl_debug_log, " (%"IVdf")", (IV)(next - start));
- (void)PerlIO_putc(Perl_debug_log, '\n');
- }
-
- after_print:
- if (PL_regkind[(U8)op] == BRANCHJ) {
- assert(next);
- {
- register const regnode *nnode = (OP(next) == LONGJMP
- ? regnext((regnode *)next)
- : next);
- if (last && nnode > last)
- nnode = last;
- DUMPUNTIL(NEXTOPER(NEXTOPER(node)), nnode);
- }
- }
- else if (PL_regkind[(U8)op] == BRANCH) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node), next);
- }
- else if ( PL_regkind[(U8)op] == TRIE ) {
- const regnode *this_trie = node;
- const char op = OP(node);
- const U32 n = ARG(node);
- const reg_ac_data * const ac = op>=AHOCORASICK ?
- (reg_ac_data *)ri->data->data[n] :
- NULL;
- const reg_trie_data * const trie =
- (reg_trie_data*)ri->data->data[op<AHOCORASICK ? n : ac->trie];
-#ifdef DEBUGGING
- AV *const trie_words = MUTABLE_AV(ri->data->data[n + TRIE_WORDS_OFFSET]);
-#endif
- const regnode *nextbranch= NULL;
- I32 word_idx;
- sv_setpvs(sv, "");
- for (word_idx= 0; word_idx < (I32)trie->wordcount; word_idx++) {
- SV ** const elem_ptr = av_fetch(trie_words,word_idx,0);
-
- PerlIO_printf(Perl_debug_log, "%*s%s ",
- (int)(2*(indent+3)), "",
- elem_ptr ? pv_pretty(sv, SvPV_nolen_const(*elem_ptr), SvCUR(*elem_ptr), 60,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*elem_ptr) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT
- )
- : "???"
- );
- if (trie->jump) {
- U16 dist= trie->jump[word_idx+1];
- PerlIO_printf(Perl_debug_log, "(%"UVuf")\n",
- (UV)((dist ? this_trie + dist : next) - start));
- if (dist) {
- if (!nextbranch)
- nextbranch= this_trie + trie->jump[0];
- DUMPUNTIL(this_trie + dist, nextbranch);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode *)nextbranch);
- } else {
- PerlIO_printf(Perl_debug_log, "\n");
- }
- }
- if (last && next > last)
- node= last;
- else
- node= next;
- }
- else if ( op == CURLY ) { /* "next" might be very big: optimizer */
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS,
- NEXTOPER(node) + EXTRA_STEP_2ARGS + 1);
- }
- else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, next);
- }
- else if ( op == PLUS || op == STAR) {
- DUMPUNTIL(NEXTOPER(node), NEXTOPER(node) + 1);
- }
- else if (op == ANYOF) {
- /* arglen 1 + class block */
- node += 1 + ((ANYOF_FLAGS(node) & ANYOF_LARGE)
- ? ANYOF_CLASS_SKIP : ANYOF_SKIP);
- node = NEXTOPER(node);
- }
- else if (PL_regkind[(U8)op] == EXACT) {
- /* Literal string, where present. */
- node += NODE_SZ_STR(node) - 1;
- node = NEXTOPER(node);
- }
- else {
- node = NEXTOPER(node);
- node += regarglen[(U8)op];
- }
- if (op == CURLYX || op == OPEN)
- indent++;
- }
- CLEAR_OPTSTART;
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d\n", (int)indent);
-#endif
- return node;
-}
-
-#endif /* DEBUGGING */
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regexec.c
- */
-
-/*
- * One Ring to rule them all, One Ring to find them
- &
- * [p.v of _The Lord of the Rings_, opening poem]
- * [p.50 of _The Lord of the Rings_, I/iii: "The Shadow of the Past"]
- * [p.254 of _The Lord of the Rings_, II/ii: "The Council of Elrond"]
- */
-
-/* This file contains functions for executing a regular expression. See
- * also regcomp.c which funnily enough, contains functions for compiling
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_exec.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGEXEC_C
-#include "perl.h"
-#include "re_defs.h"
-
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#define RF_tainted 1 /* tainted information used? */
-#define RF_warned 2 /* warned about big count? */
-
-#define RF_utf8 8 /* Pattern contains multibyte chars? */
-
-#define UTF ((PL_reg_flags & RF_utf8) != 0)
-
-#define RS_init 1 /* eval environment created */
-#define RS_set 2 /* replsv value is set */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-#define REGINCLASS(prog,p,c) (ANYOF_FLAGS(p) ? reginclass(prog,p,c,0,0) : ANYOF_BITMAP_TEST(p,*(c)))
-
-/*
- * Forwards.
- */
-
-#define CHR_SVLEN(sv) (do_utf8 ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (PL_reg_match_utf8 ? utf8_distance(a,b) : a - b)
-
-#define HOPc(pos,off) \
- (char *)(PL_reg_match_utf8 \
- ? reghop3((U8*)pos, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)) \
- : (U8*)(pos + off))
-#define HOPBACKc(pos, off) \
- (char*)(PL_reg_match_utf8\
- ? reghopmaybe3((U8*)pos, -off, (U8*)PL_bostr) \
- : (pos - off >= PL_bostr) \
- ? (U8*)pos - off \
- : NULL)
-
-#define HOP3(pos,off,lim) (PL_reg_match_utf8 ? reghop3((U8*)(pos), off, (U8*)(lim)) : (U8*)(pos + off))
-#define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim))
-
-/* these are unrolled below in the CCC_TRY_XXX defined */
-#define LOAD_UTF8_CHARCLASS(class,str) STMT_START { \
- if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)str); assert(ok); LEAVE; } } STMT_END
-#define LOAD_UTF8_CHARCLASS_ALNUM() LOAD_UTF8_CHARCLASS(alnum,"a")
-#define LOAD_UTF8_CHARCLASS_DIGIT() LOAD_UTF8_CHARCLASS(digit,"0")
-#define LOAD_UTF8_CHARCLASS_SPACE() LOAD_UTF8_CHARCLASS(space," ")
-#define LOAD_UTF8_CHARCLASS_MARK() LOAD_UTF8_CHARCLASS(mark, "\xcd\x86")
-
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS_ALNUM()
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS_SPACE()
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS_DIGIT()
-#define RE_utf8_perl_word PL_utf8_alnum
-#define RE_utf8_perl_space PL_utf8_space
-#define RE_utf8_posix_digit PL_utf8_digit
-#define perl_word alnum
-#define perl_space space
-#define posix_digit digit
-#else
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS(perl_word,"a")
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS(perl_space," ")
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS(posix_digit,"0")
-#define RE_utf8_perl_word PL_utf8_perl_word
-#define RE_utf8_perl_space PL_utf8_perl_space
-#define RE_utf8_posix_digit PL_utf8_posix_digit
-#endif
-
-
-#define CCC_TRY_AFF(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME: \
- if (!nextchr) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if (!(OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if (!(OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-#define CCC_TRY_NEG(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME : \
- if (!nextchr && locinput >= PL_regeol) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if ((OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if ((OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-
-
-
-
-/* TODO: Combine JUMPABLE and HAS_TEXT to cache OP(rn) */
-
-/* for use after a quantifier and before an EXACT-like node -- japhy */
-/* it would be nice to rework regcomp.sym to generate this stuff. sigh */
-#define JUMPABLE(rn) ( \
- OP(rn) == OPEN || \
- (OP(rn) == CLOSE && (!cur_eval || cur_eval->u.eval.close_paren != ARG(rn))) || \
- OP(rn) == EVAL || \
- OP(rn) == SUSPEND || OP(rn) == IFMATCH || \
- OP(rn) == PLUS || OP(rn) == MINMOD || \
- OP(rn) == KEEPS || (PL_regkind[OP(rn)] == VERB) || \
- (PL_regkind[OP(rn)] == CURLY && ARG1(rn) > 0) \
-)
-#define IS_EXACT(rn) (PL_regkind[OP(rn)] == EXACT)
-
-#define HAS_TEXT(rn) ( IS_EXACT(rn) || PL_regkind[OP(rn)] == REF )
-
-#if 0
-/* Currently these are only used when PL_regkind[OP(rn)] == EXACT so
- we don't need this definition. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT || OP(rn)==REF || OP(rn)==NREF )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF || OP(rn)==REFF || OP(rn)==NREFF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL || OP(rn)==REFFL || OP(rn)==NREFFL )
-
-#else
-/* ... so we use this as its faster. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL )
-
-#endif
-
-/*
- Search for mandatory following text node; for lookahead, the text must
- follow but for lookbehind (rn->flags != 0) we skip to the next step.
-*/
-#define FIND_NEXT_IMPT(rn) STMT_START { \
- while (JUMPABLE(rn)) { \
- const OPCODE type = OP(rn); \
- if (type == SUSPEND || PL_regkind[type] == CURLY) \
- rn = NEXTOPER(NEXTOPER(rn)); \
- else if (type == PLUS) \
- rn = NEXTOPER(rn); \
- else if (type == IFMATCH) \
- rn = (rn->flags == 0) ? NEXTOPER(NEXTOPER(rn)) : rn + ARG(rn); \
- else rn += NEXT_OFF(rn); \
- } \
-} STMT_END
-
-
-static void restore_pos(pTHX_ void *arg);
-
-STATIC CHECKPOINT
-S_regcppush(pTHX_ I32 parenfloor)
-{
- dVAR;
- const int retval = PL_savestack_ix;
-#define REGCP_PAREN_ELEMS 4
- const int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS;
- int p;
- GET_RE_DEBUG_FLAGS_DECL;
-
- if (paren_elems_to_push < 0)
- Perl_croak(aTHX_ "panic: paren_elems_to_push < 0");
-
-#define REGCP_OTHER_ELEMS 7
- SSGROW(paren_elems_to_push + REGCP_OTHER_ELEMS);
-
- for (p = PL_regsize; p > parenfloor; p--) {
-/* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */
- SSPUSHINT(PL_regoffs[p].end);
- SSPUSHINT(PL_regoffs[p].start);
- SSPUSHPTR(PL_reg_start_tmp[p]);
- SSPUSHINT(p);
- DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log,
- " saving \\%"UVuf" %"IVdf"(%"IVdf")..%"IVdf"\n",
- (UV)p, (IV)PL_regoffs[p].start,
- (IV)(PL_reg_start_tmp[p] - PL_bostr),
- (IV)PL_regoffs[p].end
- ));
- }
-/* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */
- SSPUSHPTR(PL_regoffs);
- SSPUSHINT(PL_regsize);
- SSPUSHINT(*PL_reglastparen);
- SSPUSHINT(*PL_reglastcloseparen);
- SSPUSHPTR(PL_reginput);
-#define REGCP_FRAME_ELEMS 2
-/* REGCP_FRAME_ELEMS are part of the REGCP_OTHER_ELEMS and
- * are needed for the regexp context stack bookkeeping. */
- SSPUSHINT(paren_elems_to_push + REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- SSPUSHINT(SAVEt_REGCONTEXT); /* Magic cookie. */
-
- return retval;
-}
-
-/* These are needed since we do not localize EVAL nodes: */
-#define REGCP_SET(cp) \
- DEBUG_STATE_r( \
- PerlIO_printf(Perl_debug_log, \
- " Setting an EVAL scope, savestack=%"IVdf"\n", \
- (IV)PL_savestack_ix)); \
- cp = PL_savestack_ix
-
-#define REGCP_UNWIND(cp) \
- DEBUG_STATE_r( \
- if (cp != PL_savestack_ix) \
- PerlIO_printf(Perl_debug_log, \
- " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \
- (IV)(cp), (IV)PL_savestack_ix)); \
- regcpblow(cp)
-
-STATIC char *
-S_regcppop(pTHX_ const regexp *rex)
-{
- dVAR;
- U32 i;
- char *input;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCPPOP;
-
- /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */
- i = SSPOPINT;
- assert(i == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */
- i = SSPOPINT; /* Parentheses elements to pop. */
- input = (char *) SSPOPPTR;
- *PL_reglastcloseparen = SSPOPINT;
- *PL_reglastparen = SSPOPINT;
- PL_regsize = SSPOPINT;
- PL_regoffs=(regexp_paren_pair *) SSPOPPTR;
-
-
- /* Now restore the parentheses context. */
- for (i -= (REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- i > 0; i -= REGCP_PAREN_ELEMS) {
- I32 tmps;
- U32 paren = (U32)SSPOPINT;
- PL_reg_start_tmp[paren] = (char *) SSPOPPTR;
- PL_regoffs[paren].start = SSPOPINT;
- tmps = SSPOPINT;
- if (paren <= *PL_reglastparen)
- PL_regoffs[paren].end = tmps;
- DEBUG_BUFFERS_r(
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n",
- (UV)paren, (IV)PL_regoffs[paren].start,
- (IV)(PL_reg_start_tmp[paren] - PL_bostr),
- (IV)PL_regoffs[paren].end,
- (paren > *PL_reglastparen ? "(no)" : ""));
- );
- }
- DEBUG_BUFFERS_r(
- if (*PL_reglastparen + 1 <= rex->nparens) {
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"IVdf"..\\%"IVdf" to undef\n",
- (IV)(*PL_reglastparen + 1), (IV)rex->nparens);
- }
- );
-#if 1
- /* It would seem that the similar code in regtry()
- * already takes care of this, and in fact it is in
- * a better location to since this code can #if 0-ed out
- * but the code in regtry() is needed or otherwise tests
- * requiring null fields (pat.t#187 and split.t#{13,14}
- * (as of patchlevel 7877) will fail. Then again,
- * this code seems to be necessary or otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * --jhi updated by dapm */
- for (i = *PL_reglastparen + 1; i <= rex->nparens; i++) {
- if (i > PL_regsize)
- PL_regoffs[i].start = -1;
- PL_regoffs[i].end = -1;
- }
-#endif
- return input;
-}
-
-#define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */
-
-/*
- * pregexec and friends
- */
-
-#ifndef PERL_IN_XSUB_RE
-/*
- - pregexec - match a regexp against a string
- */
-I32
-Perl_pregexec(pTHX_ REGEXP * const prog, char* stringarg, register char *strend,
- char *strbeg, I32 minend, SV *screamer, U32 nosave)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* nosave: For optimizations. */
-{
- PERL_ARGS_ASSERT_PREGEXEC;
-
- return
- regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL,
- nosave ? 0 : REXEC_COPY_STR);
-}
-#endif
-
-/*
- * Need to implement the following flags for reg_anch:
- *
- * USE_INTUIT_NOML - Useful to call re_intuit_start() first
- * USE_INTUIT_ML
- * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer
- * INTUIT_AUTORITATIVE_ML
- * INTUIT_ONCE_NOML - Intuit can match in one location only.
- * INTUIT_ONCE_ML
- *
- * Another flag for this function: SECOND_TIME (so that float substrs
- * with giant delta may be not rechecked).
- */
-
-/* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */
-
-/* If SCREAM, then SvPVX_const(sv) should be compatible with strpos and strend.
- Otherwise, only SvCUR(sv) is used to get strbeg. */
-
-/* XXXX We assume that strpos is strbeg unless sv. */
-
-/* XXXX Some places assume that there is a fixed substring.
- An update may be needed if optimizer marks as "INTUITable"
- RExen without fixed substrings. Similarly, it is assumed that
- lengths of all the strings are no more than minlen, thus they
- cannot come from lookahead.
- (Or minlen should take into account lookahead.)
- NOTE: Some of this comment is not correct. minlen does now take account
- of lookahead/behind. Further research is required. -- demerphq
-
-*/
-
-/* A failure to find a constant substring means that there is no need to make
- an expensive call to REx engine, thus we celebrate a failure. Similarly,
- finding a substring too deep into the string means that less calls to
- regtry() should be needed.
-
- REx compiler's optimizer found 4 possible hints:
- a) Anchored substring;
- b) Fixed substring;
- c) Whether we are anchored (beginning-of-line or \G);
- d) First node (of those at offset 0) which may distingush positions;
- We use a)b)d) and multiline-part of c), and try to find a position in the
- string which does not contradict any of them.
- */
-
-/* Most of decisions we do here should have been done at compile time.
- The nodes of the REx which we used for the search should have been
- deleted from the finite automaton. */
-
-char *
-Perl_re_intuit_start(pTHX_ REGEXP * const rx, SV *sv, char *strpos,
- char *strend, const U32 flags, re_scream_pos_data *data)
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- register I32 start_shift = 0;
- /* Should be nonnegative! */
- register I32 end_shift = 0;
- register char *s;
- register SV *check;
- char *strbeg;
- char *t;
- const bool do_utf8 = (sv && SvUTF8(sv)) ? 1 : 0; /* if no sv we have to assume bytes */
- I32 ml_anch;
- register char *other_last = NULL; /* other substr checked before this */
- char *check_at = NULL; /* check substr found at this pos */
- const I32 multiline = prog->extflags & RXf_PMf_MULTILINE;
- RXi_GET_DECL(prog,progi);
-#ifdef DEBUGGING
- const char * const i_strpos = strpos;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_START;
-
- RX_MATCH_UTF8_set(rx,do_utf8);
-
- if (RX_UTF8(rx)) {
- PL_reg_flags |= RF_utf8;
- }
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, strpos, strend,
- sv ? "Guessing start of match in sv for"
- : "Guessing start of match in string for");
- );
-
- /* CHR_DIST() would be more correct here but it makes things slow. */
- if (prog->minlen > strend - strpos) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short... [re_intuit_start]\n"));
- goto fail;
- }
-
- strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos;
- PL_regeol = strend;
- if (do_utf8) {
- if (!prog->check_utf8 && prog->check_substr)
- to_utf8_substr(prog);
- check = prog->check_utf8;
- } else {
- if (!prog->check_substr && prog->check_utf8)
- to_byte_substr(prog);
- check = prog->check_substr;
- }
- if (check == &PL_sv_undef) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Non-utf8 string cannot match utf8 check string\n"));
- goto fail;
- }
- if (prog->extflags & RXf_ANCH) { /* Match at beg-of-str or after \n */
- ml_anch = !( (prog->extflags & RXf_ANCH_SINGLE)
- || ( (prog->extflags & RXf_ANCH_BOL)
- && !multiline ) ); /* Check after \n? */
-
- if (!ml_anch) {
- if ( !(prog->extflags & RXf_ANCH_GPOS) /* Checked by the caller */
- && !(prog->intflags & PREGf_IMPLICIT) /* not a real BOL */
- /* SvCUR is not set on references: SvRV and SvPVX_const overlap */
- && sv && !SvROK(sv)
- && (strpos != strbeg)) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not at start...\n"));
- goto fail;
- }
- if (prog->check_offset_min == prog->check_offset_max &&
- !(prog->extflags & RXf_CANY_SEEN)) {
- /* Substring at constant offset from beg-of-str... */
- I32 slen;
-
- s = HOP3c(strpos, prog->check_offset_min, strend);
-
- if (SvTAIL(check)) {
- slen = SvCUR(check); /* >= 1 */
-
- if ( strend - s > slen || strend - s < slen - 1
- || (strend - s == slen && strend[-1] != '\n')) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String too long...\n"));
- goto fail_finish;
- }
- /* Now should match s[0..slen-2] */
- slen--;
- if (slen && (*SvPVX_const(check) != *s
- || (slen > 1
- && memNE(SvPVX_const(check), s, slen)))) {
- report_neq:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String not equal...\n"));
- goto fail_finish;
- }
- }
- else if (*SvPVX_const(check) != *s
- || ((slen = SvCUR(check)) > 1
- && memNE(SvPVX_const(check), s, slen)))
- goto report_neq;
- check_at = s;
- goto success_at_start;
- }
- }
- /* Match is anchored, but substr is not anchored wrt beg-of-str. */
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- if (!ml_anch) {
- const I32 end = prog->check_offset_max + CHR_SVLEN(check)
- - (SvTAIL(check) != 0);
- const I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end;
-
- if (end_shift < eshift)
- end_shift = eshift;
- }
- }
- else { /* Can match at random position */
- ml_anch = 0;
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- /* end shift should be non negative here */
- }
-
-#ifdef QDEBUGGING /* 7/99: reports of failure (with the older version) */
- if (end_shift < 0)
- Perl_croak(aTHX_ "panic: end_shift: %"IVdf" pattern:\n%s\n ",
- (IV)end_shift, RX_PRECOMP(prog));
-#endif
-
- restart:
- /* Find a possible match in the region s..strend by looking for
- the "check" substring in the region corrected by start/end_shift. */
-
- {
- I32 srch_start_shift = start_shift;
- I32 srch_end_shift = end_shift;
- if (srch_start_shift < 0 && strbeg - s > srch_start_shift) {
- srch_end_shift -= ((strbeg - s) - srch_start_shift);
- srch_start_shift = strbeg - s;
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "Check offset min: %"IVdf" Start shift: %"IVdf" End shift %"IVdf" Real End Shift: %"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)srch_start_shift,
- (IV)srch_end_shift,
- (IV)prog->check_end_shift);
- });
-
- if (flags & REXEC_SCREAM) {
- I32 p = -1; /* Internal iterator of scream. */
- I32 * const pp = data ? data->scream_pos : &p;
-
- if (PL_screamfirst[BmRARE(check)] >= 0
- || ( BmRARE(check) == '\n'
- && (BmPREVIOUS(check) == SvCUR(check) - 1)
- && SvTAIL(check) ))
- s = screaminstr(sv, check,
- srch_start_shift + (s - strbeg), srch_end_shift, pp, 0);
- else
- goto fail_finish;
- /* we may be pointing at the wrong string */
- if (s && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- if (data)
- *data->scream_olds = s;
- }
- else {
- U8* start_point;
- U8* end_point;
- if (prog->extflags & RXf_CANY_SEEN) {
- start_point= (U8*)(s + srch_start_shift);
- end_point= (U8*)(strend - srch_end_shift);
- } else {
- start_point= HOP3(s, srch_start_shift, srch_start_shift < 0 ? strbeg : strend);
- end_point= HOP3(strend, -srch_end_shift, strbeg);
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "fbm_instr len=%d str=<%.*s>\n",
- (int)(end_point - start_point),
- (int)(end_point - start_point) > 20 ? 20 : (int)(end_point - start_point),
- start_point);
- });
-
- s = fbm_instr( start_point, end_point,
- check, multiline ? FBMrf_MULTILINE : 0);
- }
- }
- /* Update the count-of-usability, remove useless subpatterns,
- unshift s. */
-
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(check), RE_SV_DUMPLEN(check), 30);
- PerlIO_printf(Perl_debug_log, "%s %s substr %s%s%s",
- (s ? "Found" : "Did not find"),
- (check == (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)
- ? "anchored" : "floating"),
- quoted,
- RE_SV_TAIL(check),
- (s ? " at offset " : "...\n") );
- });
-
- if (!s)
- goto fail_finish;
- /* Finish the diagnostic message */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) );
-
- /* XXX dmq: first branch is for positive lookbehind...
- Our check string is offset from the beginning of the pattern.
- So we need to do any stclass tests offset forward from that
- point. I think. :-(
- */
-
-
-
- check_at=s;
-
-
- /* Got a candidate. Check MBOL anchoring, and the *other* substr.
- Start with the other substr.
- XXXX no SCREAM optimization yet - and a very coarse implementation
- XXXX /ttx+/ results in anchored="ttx", floating="x". floating will
- *always* match. Probably should be marked during compile...
- Probably it is right to do no SCREAM here...
- */
-
- if (do_utf8 ? (prog->float_utf8 && prog->anchored_utf8)
- : (prog->float_substr && prog->anchored_substr))
- {
- /* Take into account the "other" substring. */
- /* XXXX May be hopelessly wrong for UTF... */
- if (!other_last)
- other_last = strpos;
- if (check == (do_utf8 ? prog->float_utf8 : prog->float_substr)) {
- do_other_anchored:
- {
- char * const last = HOP3c(s, -start_shift, strbeg);
- char *last1, *last2;
- char * const saved_s = s;
- SV* must;
-
- t = s - prog->check_offset_max;
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -(prog->check_offset_max), (U8*)strpos))
- && t > strpos)))
- NOOP;
- else
- t = strpos;
- t = HOP3c(t, prog->anchored_offset, strend);
- if (t < other_last) /* These positions already checked */
- t = other_last;
- last2 = last1 = HOP3c(strend, -prog->minlen, strbeg);
- if (last < last1)
- last1 = last;
- /* XXXX It is not documented what units *_offsets are in.
- We assume bytes, but this is clearly wrong.
- Meaning this code needs to be carefully reviewed for errors.
- dmq.
- */
-
- /* On end-of-str: see comment below. */
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->anchored_utf8); /* for debug */
- }
- else
- s = fbm_instr(
- (unsigned char*)t,
- HOP3(HOP3(last1, prog->anchored_offset, strend)
- + SvCUR(must), -(SvTAIL(must)!=0), strbeg),
- must,
- multiline ? FBMrf_MULTILINE : 0
- );
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s anchored substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
-
-
- if (!s) {
- if (last1 >= last2) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying floating at offset %ld...\n",
- (long)(HOP3c(saved_s, 1, strend) - i_strpos)));
- other_last = HOP3c(last1, prog->anchored_offset+1, strend);
- s = HOP3c(last, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- t = HOP3c(s, -prog->anchored_offset, strbeg);
- other_last = HOP3c(s, 1, strend);
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
- else { /* Take into account the floating substring. */
- char *last, *last1;
- char * const saved_s = s;
- SV* must;
-
- t = HOP3c(s, -start_shift, strbeg);
- last1 = last =
- HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg);
- if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset)
- last = HOP3c(t, prog->float_max_offset, strend);
- s = HOP3c(t, prog->float_min_offset, strend);
- if (s < other_last)
- s = other_last;
- /* XXXX It is not documented what units *_offsets are in. Assume bytes. */
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- /* fbm_instr() takes into account exact value of end-of-str
- if the check is SvTAIL(ed). Since false positives are OK,
- and end-of-str is not later than strend we are OK. */
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->float_utf8); /* for debug message */
- }
- else
- s = fbm_instr((unsigned char*)s,
- (unsigned char*)last + SvCUR(must)
- - (SvTAIL(must)!=0),
- must, multiline ? FBMrf_MULTILINE : 0);
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s floating substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
- if (!s) {
- if (last1 == last) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying anchored starting at offset %ld...\n",
- (long)(saved_s + 1 - i_strpos)));
- other_last = last;
- s = HOP3c(t, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- other_last = s; /* Fix this later. --Hugo */
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
-
-
- t= (char*)HOP3( s, -prog->check_offset_max, (prog->check_offset_max<0) ? strend : strpos);
-
- DEBUG_OPTIMISE_MORE_r(
- PerlIO_printf(Perl_debug_log,
- "Check offset min:%"IVdf" max:%"IVdf" S:%"IVdf" t:%"IVdf" D:%"IVdf" end:%"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)prog->check_offset_max,
- (IV)(s-strpos),
- (IV)(t-strpos),
- (IV)(t-s),
- (IV)(strend-strpos)
- )
- );
-
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -prog->check_offset_max, (U8*) ((prog->check_offset_max<0) ? strend : strpos)))
- && t > strpos)))
- {
- /* Fixed substring is found far enough so that the match
- cannot start at strpos. */
- try_at_offset:
- if (ml_anch && t[-1] != '\n') {
- /* Eventually fbm_*() should handle this, but often
- anchored_offset is not 0, so this check will not be wasted. */
- /* XXXX In the code below we prefer to look for "^" even in
- presence of anchored substrings. And we search even
- beyond the found float position. These pessimizations
- are historical artefacts only. */
- find_anchor:
- while (t < strend - prog->minlen) {
- if (*t == '\n') {
- if (t < check_at - prog->check_offset_min) {
- if (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) {
- /* Since we moved from the found position,
- we definitely contradict the found anchored
- substr. Due to the above check we do not
- contradict "check" substr.
- Thus we can arrive here only if check substr
- is float. Redo checking for "other"=="fixed".
- */
- strpos = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset)));
- goto do_other_anchored;
- }
- /* We don't contradict the found floating substring. */
- /* XXXX Why not check for STCLASS? */
- s = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(s - i_strpos)));
- goto set_useful;
- }
- /* Position contradicts check-string */
- /* XXXX probably better to look for check-string
- than for "\n", so one should lower the limit for t? */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t + 1 - i_strpos)));
- other_last = strpos = s = t + 1;
- goto restart;
- }
- t++;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- goto fail_finish;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- }
- s = t;
- set_useful:
- ++BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr); /* hooray/5 */
- }
- else {
- /* The found string does not prohibit matching at strpos,
- - no optimization of calling REx engine can be performed,
- unless it was an MBOL and we are not after MBOL,
- or a future STCLASS check will fail this. */
- try_at_start:
- /* Even in this situation we may use MBOL flag if strpos is offset
- wrt the start of the string. */
- if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */
- && (strpos != strbeg) && strpos[-1] != '\n'
- /* May be due to an implicit anchor of m{.*foo} */
- && !(prog->intflags & PREGf_IMPLICIT))
- {
- t = strpos;
- goto find_anchor;
- }
- DEBUG_EXECUTE_r( if (ml_anch)
- PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n",
- (long)(strpos - i_strpos), PL_colors[0], PL_colors[1]);
- );
- success_at_start:
- if (!(prog->intflags & PREGf_NAUGHTY) /* XXXX If strpos moved? */
- && (do_utf8 ? (
- prog->check_utf8 /* Could be deleted already */
- && --BmUSEFUL(prog->check_utf8) < 0
- && (prog->check_utf8 == prog->float_utf8)
- ) : (
- prog->check_substr /* Could be deleted already */
- && --BmUSEFUL(prog->check_substr) < 0
- && (prog->check_substr == prog->float_substr)
- )))
- {
- /* If flags & SOMETHING - do not do it many times on the same match */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n"));
- SvREFCNT_dec(do_utf8 ? prog->check_utf8 : prog->check_substr);
- if (do_utf8 ? prog->check_substr : prog->check_utf8)
- SvREFCNT_dec(do_utf8 ? prog->check_substr : prog->check_utf8);
- prog->check_substr = prog->check_utf8 = NULL; /* disable */
- prog->float_substr = prog->float_utf8 = NULL; /* clear */
- check = NULL; /* abort */
- s = strpos;
- /* XXXX This is a remnant of the old implementation. It
- looks wasteful, since now INTUIT can use many
- other heuristics. */
- prog->extflags &= ~RXf_USE_INTUIT;
- }
- else
- s = strpos;
- }
-
- /* Last resort... */
- /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */
- /* trie stclasses are too expensive to use here, we are better off to
- leave it to regmatch itself */
- if (progi->regstclass && PL_regkind[OP(progi->regstclass)]!=TRIE) {
- /* minlen == 0 is possible if regstclass is \b or \B,
- and the fixed substr is ''$.
- Since minlen is already taken into account, s+1 is before strend;
- accidentally, minlen >= 1 guaranties no false positives at s + 1
- even for \b or \B. But (minlen? 1 : 0) below assumes that
- regstclass does not come from lookahead... */
- /* If regstclass takes bytelength more than 1: If charlength==1, OK.
- This leaves EXACTF only, which is dealt with in find_byclass(). */
- const U8* const str = (U8*)STRING(progi->regstclass);
- const int cl_l = (PL_regkind[OP(progi->regstclass)] == EXACT
- ? CHR_DIST(str+STR_LEN(progi->regstclass), str)
- : 1);
- char * endpos;
- if (prog->anchored_substr || prog->anchored_utf8 || ml_anch)
- endpos= HOP3c(s, (prog->minlen ? cl_l : 0), strend);
- else if (prog->float_substr || prog->float_utf8)
- endpos= HOP3c(HOP3c(check_at, -start_shift, strbeg), cl_l, strend);
- else
- endpos= strend;
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %"IVdf" s: %"IVdf" endpos: %"IVdf"\n",
- (IV)start_shift, (IV)(check_at - strbeg), (IV)(s - strbeg), (IV)(endpos - strbeg)));
-
- t = s;
- s = find_byclass(prog, progi->regstclass, s, endpos, NULL);
- if (!s) {
-#ifdef DEBUGGING
- const char *what = NULL;
-#endif
- if (endpos == strend) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "This position contradicts STCLASS...\n") );
- if ((prog->extflags & RXf_ANCH) && !ml_anch)
- goto fail;
- /* Contradict one of substrings */
- if (prog->anchored_substr || prog->anchored_utf8) {
- if ((do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) == check) {
- DEBUG_EXECUTE_r( what = "anchored" );
- hop_and_restart:
- s = HOP3c(t, 1, strend);
- if (s + start_shift + end_shift > strend) {
- /* XXXX Should be taken into account earlier? */
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for %s substr starting at offset %ld...\n",
- what, (long)(s + start_shift - i_strpos)) );
- goto restart;
- }
- /* Have both, check_string is floating */
- if (t + start_shift >= check_at) /* Contradicts floating=check */
- goto retry_floating_check;
- /* Recheck anchored substring, but not floating... */
- s = check_at;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for anchored substr starting at offset %ld...\n",
- (long)(other_last - i_strpos)) );
- goto do_other_anchored;
- }
- /* Another way we could have checked stclass at the
- current position only: */
- if (ml_anch) {
- s = t = t + 1;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for /%s^%s/m starting at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t - i_strpos)) );
- goto try_at_offset;
- }
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) /* Could have been deleted */
- goto fail;
- /* Check is floating subtring. */
- retry_floating_check:
- t = check_at - start_shift;
- DEBUG_EXECUTE_r( what = "floating" );
- goto hop_and_restart;
- }
- if (t != s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "By STCLASS: moving %ld --> %ld\n",
- (long)(t - i_strpos), (long)(s - i_strpos))
- );
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Does not contradict STCLASS...\n");
- );
- }
- }
- giveup:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n",
- PL_colors[4], (check ? "Guessed" : "Giving up"),
- PL_colors[5], (long)(s - i_strpos)) );
- return s;
-
- fail_finish: /* Substring not found */
- if (prog->check_substr || prog->check_utf8) /* could be removed already */
- BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr) += 5; /* hooray */
- fail:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n",
- PL_colors[4], PL_colors[5]));
- return NULL;
-}
-
-#define DECL_TRIE_TYPE(scan) \
- const enum { trie_plain, trie_utf8, trie_utf8_fold, trie_latin_utf8_fold } \
- trie_type = (scan->flags != EXACT) \
- ? (do_utf8 ? trie_utf8_fold : (UTF ? trie_latin_utf8_fold : trie_plain)) \
- : (do_utf8 ? trie_utf8 : trie_plain)
-
-#define REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, uscan, len, \
-uvc, charid, foldlen, foldbuf, uniflags) STMT_START { \
- UV uvc_unfolded = 0; \
- switch (trie_type) { \
- case trie_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc_unfolded = uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- uvc_unfolded = uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_latin_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- len = 1; \
- uvc = to_uni_fold( *(U8*)uc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_utf8: \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- break; \
- case trie_plain: \
- uvc = (UV)*uc; \
- len = 1; \
- } \
- \
- if (uvc < 256) { \
- charid = trie->charmap[ uvc ]; \
- } \
- else { \
- charid = 0; \
- if (widecharmap) { \
- SV** const svpp = hv_fetch(widecharmap, \
- (char*)&uvc, sizeof(UV), 0); \
- if (svpp) \
- charid = (U16)SvIV(*svpp); \
- } \
- } \
- if (!charid && trie_type == trie_utf8_fold && !UTF) { \
- charid = trie->charmap[uvc_unfolded]; \
- } \
-} STMT_END
-
-#define REXEC_FBC_EXACTISH_CHECK(CoNd) \
-{ \
- char *my_strend= (char *)strend; \
- if ( (CoNd) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8, \
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- else { \
- U8 foldbuf[UTF8_MAXBYTES_CASE+1]; \
- uvchr_to_utf8(tmpbuf, c); \
- f = to_utf8_fold(tmpbuf, foldbuf, &foldlen); \
- if ( f != c \
- && (f == c1 || f == c2) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8,\
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- } \
-} \
-s += len
-
-#define REXEC_FBC_EXACTISH_SCAN(CoNd) \
-STMT_START { \
- while (s <= e) { \
- if ( (CoNd) \
- && (ln == 1 || !(OP(c) == EXACTF \
- ? ibcmp(s, m, ln) \
- : ibcmp_locale(s, m, ln))) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_SCAN(CoDe) \
-STMT_START { \
- while (s + (uskip = UTF8SKIP(s)) <= strend) { \
- CoDe \
- s += uskip; \
- } \
-} STMT_END
-
-#define REXEC_FBC_SCAN(CoDe) \
-STMT_START { \
- while (s < strend) { \
- CoDe \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_CLASS_SCAN(CoNd) \
-REXEC_FBC_UTF8_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_CLASS_SCAN(CoNd) \
-REXEC_FBC_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_TRYIT \
-if ((!reginfo || regtry(reginfo, &s))) \
- goto got_it
-
-#define REXEC_FBC_CSCAN(CoNdUtF8,CoNd) \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_PRELOAD(UtFpReLoAd,CoNdUtF8,CoNd) \
- if (do_utf8) { \
- UtFpReLoAd; \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_TAINT(CoNdUtF8,CoNd) \
- PL_reg_flags |= RF_tainted; \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define DUMP_EXEC_POS(li,s,doutf8) \
- dump_exec_pos(li,s,(PL_regeol),(PL_bostr),(PL_reg_starttry),doutf8)
-
-/* We know what class REx starts with. Try to find this position... */
-/* if reginfo is NULL, its a dryrun */
-/* annoyingly all the vars in this routine have different names from their counterparts
- in regmatch. /grrr */
-
-STATIC char *
-S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
- const char *strend, regmatch_info *reginfo)
-{
- dVAR;
- const I32 doevery = (prog->intflags & PREGf_SKIP) == 0;
- char *m;
- STRLEN ln;
- STRLEN lnc;
- register STRLEN uskip;
- unsigned int c1;
- unsigned int c2;
- char *e;
- register I32 tmp = 1; /* Scratch variable? */
- register const bool do_utf8 = PL_reg_match_utf8;
- RXi_GET_DECL(prog,progi);
-
- PERL_ARGS_ASSERT_FIND_BYCLASS;
-
- /* We know what class it must start with. */
- switch (OP(c)) {
- case ANYOF:
- if (do_utf8) {
- REXEC_FBC_UTF8_CLASS_SCAN((ANYOF_FLAGS(c) & ANYOF_UNICODE) ||
- !UTF8_IS_INVARIANT((U8)s[0]) ?
- reginclass(prog, c, (U8*)s, 0, do_utf8) :
- REGINCLASS(prog, c, (U8*)s));
- }
- else {
- while (s < strend) {
- STRLEN skip = 1;
-
- if (REGINCLASS(prog, c, (U8*)s) ||
- (ANYOF_FOLD_SHARP_S(c, s, strend) &&
- /* The assignment of 2 is intentional:
- * for the folded sharp s, the skip is 2. */
- (skip = SHARP_S_SKIP))) {
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += skip;
- }
- }
- break;
- case CANY:
- REXEC_FBC_SCAN(
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- );
- break;
- case EXACTF:
- m = STRING(c);
- ln = STR_LEN(c); /* length to match in octets/bytes */
- lnc = (I32) ln; /* length to match in characters */
- if (UTF) {
- STRLEN ulen1, ulen2;
- U8 *sm = (U8 *) m;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
- /* used by commented-out code below */
- /*const U32 uniflags = UTF8_ALLOW_DEFAULT;*/
-
- /* XXX: Since the node will be case folded at compile
- time this logic is a little odd, although im not
- sure that its actually wrong. --dmq */
-
- c1 = to_utf8_lower((U8*)m, tmpbuf1, &ulen1);
- c2 = to_utf8_upper((U8*)m, tmpbuf2, &ulen2);
-
- /* XXX: This is kinda strange. to_utf8_XYZ returns the
- codepoint of the first character in the converted
- form, yet originally we did the extra step.
- No tests fail by commenting this code out however
- so Ive left it out. -- dmq.
-
- c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- */
-
- lnc = 0;
- while (sm < ((U8 *) m + ln)) {
- lnc++;
- sm += UTF8SKIP(sm);
- }
- }
- else {
- c1 = *(U8*)m;
- c2 = PL_fold[c1];
- }
- goto do_exactf;
- case EXACTFL:
- m = STRING(c);
- ln = STR_LEN(c);
- lnc = (I32) ln;
- c1 = *(U8*)m;
- c2 = PL_fold_locale[c1];
- do_exactf:
- e = HOP3c(strend, -((I32)lnc), s);
-
- if (!reginfo && e < s)
- e = s; /* Due to minlen logic of intuit() */
-
- /* The idea in the EXACTF* cases is to first find the
- * first character of the EXACTF* node and then, if
- * necessary, case-insensitively compare the full
- * text of the node. The c1 and c2 are the first
- * characters (though in Unicode it gets a bit
- * more complicated because there are more cases
- * than just upper and lower: one needs to use
- * the so-called folding case for case-insensitive
- * matching (called "loose matching" in Unicode).
- * ibcmp_utf8() will do just that. */
-
- if (do_utf8 || UTF) {
- UV c, f;
- U8 tmpbuf [UTF8_MAXBYTES+1];
- STRLEN len = 1;
- STRLEN foldlen;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- if (c1 == c2) {
- /* Upper and lower of 1st char are equal -
- * probably not a "letter". */
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
- REXEC_FBC_EXACTISH_CHECK(c == c1);
- }
- }
- else {
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
-
- /* Handle some of the three Greek sigmas cases.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (the character class or ANYOF cases)
- * are handled during compiletime in
- * regexec.c:S_regclass(). */
- if (c == (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA ||
- c == (UV)UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA)
- c = (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA;
-
- REXEC_FBC_EXACTISH_CHECK(c == c1 || c == c2);
- }
- }
- }
- else {
- /* Neither pattern nor string are UTF8 */
- if (c1 == c2)
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1);
- else
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1 || *(U8*)s == c2);
- }
- break;
- case BOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == BOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == BOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- if ((!prog->minlen && tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NBOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == NBOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == NBOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == NBOUND ?
- isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- if ((!prog->minlen && !tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case ALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- isALNUM(*s)
- );
- case ALNUML:
- REXEC_FBC_CSCAN_TAINT(
- isALNUM_LC_utf8((U8*)s),
- isALNUM_LC(*s)
- );
- case NALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- !swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- !isALNUM(*s)
- );
- case NALNUML:
- REXEC_FBC_CSCAN_TAINT(
- !isALNUM_LC_utf8((U8*)s),
- !isALNUM_LC(*s)
- );
- case SPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- *s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8),
- isSPACE(*s)
- );
- case SPACEL:
- REXEC_FBC_CSCAN_TAINT(
- *s == ' ' || isSPACE_LC_utf8((U8*)s),
- isSPACE_LC(*s)
- );
- case NSPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- !(*s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8)),
- !isSPACE(*s)
- );
- case NSPACEL:
- REXEC_FBC_CSCAN_TAINT(
- !(*s == ' ' || isSPACE_LC_utf8((U8*)s)),
- !isSPACE_LC(*s)
- );
- case DIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- isDIGIT(*s)
- );
- case DIGITL:
- REXEC_FBC_CSCAN_TAINT(
- isDIGIT_LC_utf8((U8*)s),
- isDIGIT_LC(*s)
- );
- case NDIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- !swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- !isDIGIT(*s)
- );
- case NDIGITL:
- REXEC_FBC_CSCAN_TAINT(
- !isDIGIT_LC_utf8((U8*)s),
- !isDIGIT_LC(*s)
- );
- case LNBREAK:
- REXEC_FBC_CSCAN(
- is_LNBREAK_utf8(s),
- is_LNBREAK_latin1(s)
- );
- case VERTWS:
- REXEC_FBC_CSCAN(
- is_VERTWS_utf8(s),
- is_VERTWS_latin1(s)
- );
- case NVERTWS:
- REXEC_FBC_CSCAN(
- !is_VERTWS_utf8(s),
- !is_VERTWS_latin1(s)
- );
- case HORIZWS:
- REXEC_FBC_CSCAN(
- is_HORIZWS_utf8(s),
- is_HORIZWS_latin1(s)
- );
- case NHORIZWS:
- REXEC_FBC_CSCAN(
- !is_HORIZWS_utf8(s),
- !is_HORIZWS_latin1(s)
- );
- case AHOCORASICKC:
- case AHOCORASICK:
- {
- DECL_TRIE_TYPE(c);
- /* what trie are we using right now */
- reg_ac_data *aho
- = (reg_ac_data*)progi->data->data[ ARG( c ) ];
- reg_trie_data *trie
- = (reg_trie_data*)progi->data->data[ aho->trie ];
- HV *widecharmap = MUTABLE_HV(progi->data->data[ aho->trie + 1 ]);
-
- const char *last_start = strend - trie->minlen;
-#ifdef DEBUGGING
- const char *real_start = s;
-#endif
- STRLEN maxlen = trie->maxlen;
- SV *sv_points;
- U8 **points; /* map of where we were in the input string
- when reading a given char. For ASCII this
- is unnecessary overhead as the relationship
- is always 1:1, but for Unicode, especially
- case folded Unicode this is not true. */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- U8 *bitmap=NULL;
-
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- /* We can't just allocate points here. We need to wrap it in
- * an SV so it gets freed properly if there is a croak while
- * running the match */
- ENTER;
- SAVETMPS;
- sv_points=newSV(maxlen * sizeof(U8 *));
- SvCUR_set(sv_points,
- maxlen * sizeof(U8 *));
- SvPOK_on(sv_points);
- sv_2mortal(sv_points);
- points=(U8**)SvPV_nolen(sv_points );
- if ( trie_type != trie_utf8_fold
- && (trie->bitmap || OP(c)==AHOCORASICKC) )
- {
- if (trie->bitmap)
- bitmap=(U8*)trie->bitmap;
- else
- bitmap=(U8*)ANYOF_BITMAP(c);
- }
- /* this is the Aho-Corasick algorithm modified a touch
- to include special handling for long "unknown char"
- sequences. The basic idea being that we use AC as long
- as we are dealing with a possible matching char, when
- we encounter an unknown char (and we have not encountered
- an accepting state) we scan forward until we find a legal
- starting char.
- AC matching is basically that of trie matching, except
- that when we encounter a failing transition, we fall back
- to the current states "fail state", and try the current char
- again, a process we repeat until we reach the root state,
- state 1, or a legal transition. If we fail on the root state
- then we can either terminate if we have reached an accepting
- state previously, or restart the entire process from the beginning
- if we have not.
-
- */
- while (s <= last_start) {
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- U8 *uc = (U8*)s;
- U16 charid = 0;
- U32 base = 1;
- U32 state = 1;
- UV uvc = 0;
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- U8 *leftmost = NULL;
-#ifdef DEBUGGING
- U32 accepted_word= 0;
-#endif
- U32 pointpos = 0;
-
- while ( state && uc <= (U8*)strend ) {
- int failed=0;
- U32 word = aho->states[ state ].wordnum;
-
- if( state==1 ) {
- if ( bitmap ) {
- DEBUG_TRIE_EXECUTE_r(
- if ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- dump_exec_pos( (char *)uc, c, strend, real_start,
- (char *)uc, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- " Scanning for legal start char...\n");
- }
- );
- while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- uc++;
- }
- s= (char *)uc;
- }
- if (uc >(U8*)last_start) break;
- }
-
- if ( word ) {
- U8 *lpos= points[ (pointpos - trie->wordlen[word-1] ) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=word);
- leftmost= lpos;
- }
- if (base==0) break;
-
- }
- points[pointpos++ % maxlen]= uc;
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
- DEBUG_TRIE_EXECUTE_r({
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf(Perl_debug_log,
- " Charid:%3u CP:%4"UVxf" ",
- charid, uvc);
- });
-
- do {
-#ifdef DEBUGGING
- word = aho->states[ state ].wordnum;
-#endif
- base = aho->states[ state ].trans.base;
-
- DEBUG_TRIE_EXECUTE_r({
- if (failed)
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%sState: %4"UVxf", word=%"UVxf,
- failed ? " Fail transition to " : "",
- (UV)state, (UV)word);
- });
- if ( base ) {
- U32 tmp;
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state
- && (tmp=trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next))
- {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - legal\n"));
- state = tmp;
- break;
- }
- else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - fail\n"));
- failed = 1;
- state = aho->fail[state];
- }
- }
- else {
- /* we must be accepting here */
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - accepting\n"));
- failed = 1;
- break;
- }
- } while(state);
- uc += len;
- if (failed) {
- if (leftmost)
- break;
- if (!state) state = 1;
- }
- }
- if ( aho->states[ state ].wordnum ) {
- U8 *lpos = points[ (pointpos - trie->wordlen[aho->states[ state ].wordnum-1]) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=aho->states[ state ].wordnum);
- leftmost = lpos;
- }
- }
- if (leftmost) {
- s = (char*)leftmost;
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf(
- Perl_debug_log,"Matches word #%"UVxf" at position %"IVdf". Trying full pattern...\n",
- (UV)accepted_word, (IV)(s - real_start)
- );
- });
- if (!reginfo || regtry(reginfo, &s)) {
- FREETMPS;
- LEAVE;
- goto got_it;
- }
- s = HOPc(s,1);
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,"Pattern failed. Looking for new start point...\n");
- });
- } else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,"No match.\n"));
- break;
- }
- }
- FREETMPS;
- LEAVE;
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c));
- break;
- }
- return 0;
- got_it:
- return s;
-}
-
-
-/*
- - regexec_flags - match a regexp against a string
- */
-I32
-Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, register char *strend,
- char *strbeg, I32 minend, SV *sv, void *data, U32 flags)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* data: May be used for some additional optimizations.
- Currently its only used, with a U32 cast, for transmitting
- the ganch offset when doing a /g match. This will change */
-/* nosave: For optimizations. */
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- /*register*/ char *s;
- register regnode *c;
- /*register*/ char *startpos = stringarg;
- I32 minlen; /* must match at least this many chars */
- I32 dontbother = 0; /* how many characters not to try at end */
- I32 end_shift = 0; /* Same for the end. */ /* CC */
- I32 scream_pos = -1; /* Internal iterator of scream. */
- char *scream_olds = NULL;
- const bool do_utf8 = (bool)DO_UTF8(sv);
- I32 multiline;
- RXi_GET_DECL(prog,progi);
- regmatch_info reginfo; /* create some info to pass to regtry etc */
- regexp_paren_pair *swap = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGEXEC_FLAGS;
- PERL_UNUSED_ARG(data);
-
- /* Be paranoid... */
- if (prog == NULL || startpos == NULL) {
- Perl_croak(aTHX_ "NULL regexp parameter");
- return 0;
- }
-
- multiline = prog->extflags & RXf_PMf_MULTILINE;
- reginfo.prog = rx; /* Yes, sorry that this is confusing. */
-
- RX_MATCH_UTF8_set(rx, do_utf8);
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, startpos, strend,
- "Matching");
- );
-
- minlen = prog->minlen;
-
- if (strend - startpos < (minlen+(prog->check_offset_min<0?prog->check_offset_min:0))) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short [regexec_flags]...\n"));
- goto phooey;
- }
-
-
- /* Check validity of program. */
- if (UCHARAT(progi->program) != REG_MAGIC) {
- Perl_croak(aTHX_ "corrupted regexp program");
- }
-
- PL_reg_flags = 0;
- PL_reg_eval_set = 0;
- PL_reg_maxiter = 0;
-
- if (RX_UTF8(rx))
- PL_reg_flags |= RF_utf8;
-
- /* Mark beginning of line for ^ and lookbehind. */
- reginfo.bol = startpos; /* XXX not used ??? */
- PL_bostr = strbeg;
- reginfo.sv = sv;
-
- /* Mark end of line for $ (and such) */
- PL_regeol = strend;
-
- /* see how far we have to get to not match where we matched before */
- reginfo.till = startpos+minend;
-
- /* If there is a "must appear" string, look for it. */
- s = startpos;
-
- if (prog->extflags & RXf_GPOS_SEEN) { /* Need to set reginfo->ganch */
- MAGIC *mg;
- if (flags & REXEC_IGNOREPOS){ /* Means: check only at start */
- reginfo.ganch = startpos + prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS IGNOREPOS: reginfo.ganch = startpos + %"UVxf"\n",(UV)prog->gofs));
- } else if (sv && SvTYPE(sv) >= SVt_PVMG
- && SvMAGIC(sv)
- && (mg = mg_find(sv, PERL_MAGIC_regex_global))
- && mg->mg_len >= 0) {
- reginfo.ganch = strbeg + mg->mg_len; /* Defined pos() */
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS MAGIC: reginfo.ganch = strbeg + %"IVdf"\n",(IV)mg->mg_len));
-
- if (prog->extflags & RXf_ANCH_GPOS) {
- if (s > reginfo.ganch)
- goto phooey;
- s = reginfo.ganch - prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS ANCH_GPOS: s = ganch - %"UVxf"\n",(UV)prog->gofs));
- if (s < strbeg)
- goto phooey;
- }
- }
- else if (data) {
- reginfo.ganch = strbeg + PTR2UV(data);
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS DATA: reginfo.ganch= strbeg + %"UVxf"\n",PTR2UV(data)));
-
- } else { /* pos() not defined */
- reginfo.ganch = strbeg;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS: reginfo.ganch = strbeg\n"));
- }
- }
- if (PL_curpm && (PM_GETRE(PL_curpm) == rx)) {
- /* We have to be careful. If the previous successful match
- was from this regex we don't want a subsequent partially
- successful match to clobber the old results.
- So when we detect this possibility we add a swap buffer
- to the re, and switch the buffer each match. If we fail
- we switch it back, otherwise we leave it swapped.
- */
- swap = prog->offs;
- /* do we need a save destructor here for eval dies? */
- Newxz(prog->offs, (prog->nparens + 1), regexp_paren_pair);
- }
- if (!(flags & REXEC_CHECKED) && (prog->check_substr != NULL || prog->check_utf8 != NULL)) {
- re_scream_pos_data d;
-
- d.scream_olds = &scream_olds;
- d.scream_pos = &scream_pos;
- s = re_intuit_start(rx, sv, s, strend, flags, &d);
- if (!s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not present...\n"));
- goto phooey; /* not present */
- }
- }
-
-
-
- /* Simplest case: anchored match need be tried only once. */
- /* [unless only anchor is BOL and multiline is set] */
- if (prog->extflags & (RXf_ANCH & ~RXf_ANCH_GPOS)) {
- if (s == startpos && regtry(®info, &startpos))
- goto got_it;
- else if (multiline || (prog->intflags & PREGf_IMPLICIT)
- || (prog->extflags & RXf_ANCH_MBOL)) /* XXXX SBOL? */
- {
- char *end;
-
- if (minlen)
- dontbother = minlen - 1;
- end = HOP3c(strend, -dontbother, strbeg) - 1;
- /* for multiline we only have to try after newlines */
- if (prog->check_substr || prog->check_utf8) {
- if (s == startpos)
- goto after_try;
- while (1) {
- if (regtry(®info, &s))
- goto got_it;
- after_try:
- if (s > end)
- goto phooey;
- if (prog->extflags & RXf_USE_INTUIT) {
- s = re_intuit_start(rx, sv, s + 1, strend, flags, NULL);
- if (!s)
- goto phooey;
- }
- else
- s++;
- }
- } else {
- if (s > startpos)
- s--;
- while (s < end) {
- if (*s++ == '\n') { /* don't need PL_utf8skip here */
- if (regtry(®info, &s))
- goto got_it;
- }
- }
- }
- }
- goto phooey;
- } else if (RXf_GPOS_CHECK == (prog->extflags & RXf_GPOS_CHECK))
- {
- /* the warning about reginfo.ganch being used without intialization
- is bogus -- we set it above, when prog->extflags & RXf_GPOS_SEEN
- and we only enter this block when the same bit is set. */
- char *tmp_s = reginfo.ganch - prog->gofs;
-
- if (tmp_s >= strbeg && regtry(®info, &tmp_s))
- goto got_it;
- goto phooey;
- }
-
- /* Messy cases: unanchored match. */
- if ((prog->anchored_substr || prog->anchored_utf8) && prog->intflags & PREGf_SKIP) {
- /* we have /x+whatever/ */
- /* it must be a one character string (XXXX Except UTF?) */
- char ch;
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- ch = SvPVX_const(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)[0];
-
- if (do_utf8) {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s += UTF8SKIP(s);
- while (s < strend && *s == ch)
- s += UTF8SKIP(s);
- }
- );
- }
- else {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s++;
- while (s < strend && *s == ch)
- s++;
- }
- );
- }
- DEBUG_EXECUTE_r(if (!did_match)
- PerlIO_printf(Perl_debug_log,
- "Did not find anchored character...\n")
- );
- }
- else if (prog->anchored_substr != NULL
- || prog->anchored_utf8 != NULL
- || ((prog->float_substr != NULL || prog->float_utf8 != NULL)
- && prog->float_max_offset < strend - s)) {
- SV *must;
- I32 back_max;
- I32 back_min;
- char *last;
- char *last1; /* Last position checked before */
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (prog->anchored_substr || prog->anchored_utf8) {
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- back_max = back_min = prog->anchored_offset;
- } else {
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- back_max = prog->float_max_offset;
- back_min = prog->float_min_offset;
- }
-
-
- if (must == &PL_sv_undef)
- /* could not downgrade utf8 check substring, so must fail */
- goto phooey;
-
- if (back_min<0) {
- last = strend;
- } else {
- last = HOP3c(strend, /* Cannot start after this */
- -(I32)(CHR_SVLEN(must)
- - (SvTAIL(must) != 0) + back_min), strbeg);
- }
- if (s > PL_bostr)
- last1 = HOPc(s, -1);
- else
- last1 = s - 1; /* bogus */
-
- /* XXXX check_substr already used to find "s", can optimize if
- check_substr==must. */
- scream_pos = -1;
- dontbother = end_shift;
- strend = HOPc(strend, -dontbother);
- while ( (s <= last) &&
- ((flags & REXEC_SCREAM)
- ? (s = screaminstr(sv, must, HOP3c(s, back_min, (back_min<0 ? strbeg : strend)) - strbeg,
- end_shift, &scream_pos, 0))
- : (s = fbm_instr((unsigned char*)HOP3(s, back_min, (back_min<0 ? strbeg : strend)),
- (unsigned char*)strend, must,
- multiline ? FBMrf_MULTILINE : 0))) ) {
- /* we may be pointing at the wrong string */
- if ((flags & REXEC_SCREAM) && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- DEBUG_EXECUTE_r( did_match = 1 );
- if (HOPc(s, -back_max) > last1) {
- last1 = HOPc(s, -back_min);
- s = HOPc(s, -back_max);
- }
- else {
- char * const t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1;
-
- last1 = HOPc(s, -back_min);
- s = t;
- }
- if (do_utf8) {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s += UTF8SKIP(s);
- }
- }
- else {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s++;
- }
- }
- }
- DEBUG_EXECUTE_r(if (!did_match) {
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "Did not find %s substr %s%s...\n",
- ((must == prog->anchored_substr || must == prog->anchored_utf8)
- ? "anchored" : "floating"),
- quoted, RE_SV_TAIL(must));
- });
- goto phooey;
- }
- else if ( (c = progi->regstclass) ) {
- if (minlen) {
- const OPCODE op = OP(progi->regstclass);
- /* don't bother with what can't match */
- if (PL_regkind[op] != EXACT && op != CANY && PL_regkind[op] != TRIE)
- strend = HOPc(strend, -(minlen - 1));
- }
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, c);
- {
- RE_PV_QUOTED_DECL(quoted,do_utf8,PERL_DEBUG_PAD_ZERO(1),
- s,strend-s,60);
- PerlIO_printf(Perl_debug_log,
- "Matching stclass %.*s against %s (%d chars)\n",
- (int)SvCUR(prop), SvPVX_const(prop),
- quoted, (int)(strend - s));
- }
- });
- if (find_byclass(prog, c, s, strend, ®info))
- goto got_it;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass... [regexec_flags]\n"));
- }
- else {
- dontbother = 0;
- if (prog->float_substr != NULL || prog->float_utf8 != NULL) {
- /* Trim the end. */
- char *last;
- SV* float_real;
-
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- float_real = do_utf8 ? prog->float_utf8 : prog->float_substr;
-
- if (flags & REXEC_SCREAM) {
- last = screaminstr(sv, float_real, s - strbeg,
- end_shift, &scream_pos, 1); /* last one */
- if (!last)
- last = scream_olds; /* Only one occurrence. */
- /* we may be pointing at the wrong string */
- else if (RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- }
- else {
- STRLEN len;
- const char * const little = SvPV_const(float_real, len);
-
- if (SvTAIL(float_real)) {
- if (memEQ(strend - len + 1, little, len - 1))
- last = strend - len + 1;
- else if (!multiline)
- last = memEQ(strend - len, little, len)
- ? strend - len : NULL;
- else
- goto find_last;
- } else {
- find_last:
- if (len)
- last = rninstr(s, strend, little, little + len);
- else
- last = strend; /* matching "$" */
- }
- }
- if (last == NULL) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%sCan't trim the tail, match fails (should not happen)%s\n",
- PL_colors[4], PL_colors[5]));
- goto phooey; /* Should not happen! */
- }
- dontbother = strend - last + prog->float_min_offset;
- }
- if (minlen && (dontbother < minlen))
- dontbother = minlen - 1;
- strend -= dontbother; /* this one's always in bytes! */
- /* We don't know much -- general case. */
- if (do_utf8) {
- for (;;) {
- if (regtry(®info, &s))
- goto got_it;
- if (s >= strend)
- break;
- s += UTF8SKIP(s);
- };
- }
- else {
- do {
- if (regtry(®info, &s))
- goto got_it;
- } while (s++ < strend);
- }
- }
-
- /* Failure. */
- goto phooey;
-
-got_it:
- Safefree(swap);
- RX_MATCH_TAINTED_set(rx, PL_reg_flags & RF_tainted);
-
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (RXp_PAREN_NAMES(prog))
- (void)hv_iterinit(RXp_PAREN_NAMES(prog));
-
- /* make sure $`, $&, $', and $digit will work later */
- if ( !(flags & REXEC_NOT_FIRST) ) {
- RX_MATCH_COPY_FREE(rx);
- if (flags & REXEC_COPY_STR) {
- const I32 i = PL_regeol - startpos + (stringarg - strbeg);
-#ifdef PERL_OLD_COPY_ON_WRITE
- if ((SvIsCOW(sv)
- || (SvFLAGS(sv) & CAN_COW_MASK) == CAN_COW_FLAGS)) {
- if (DEBUG_C_TEST) {
- PerlIO_printf(Perl_debug_log,
- "Copy on write: regexp capture, type %d\n",
- (int) SvTYPE(sv));
- }
- prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv);
- prog->subbeg = (char *)SvPVX_const(prog->saved_copy);
- assert (SvPOKp(prog->saved_copy));
- } else
-#endif
- {
- RX_MATCH_COPIED_on(rx);
- s = savepvn(strbeg, i);
- prog->subbeg = s;
- }
- prog->sublen = i;
- }
- else {
- prog->subbeg = strbeg;
- prog->sublen = PL_regeol - strbeg; /* strend may have been modified */
- }
- }
-
- return 1;
-
-phooey:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n",
- PL_colors[4], PL_colors[5]));
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (swap) {
- /* we failed :-( roll it back */
- Safefree(prog->offs);
- prog->offs = swap;
- }
-
- return 0;
-}
-
-
-/*
- - regtry - try match at specific point
- */
-STATIC I32 /* 0 failure, 1 success */
-S_regtry(pTHX_ regmatch_info *reginfo, char **startpos)
-{
- dVAR;
- CHECKPOINT lastcp;
- REGEXP *const rx = reginfo->prog;
- regexp *const prog = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTRY;
-
- reginfo->cutpoint=NULL;
-
- if ((prog->extflags & RXf_EVAL_SEEN) && !PL_reg_eval_set) {
- MAGIC *mg;
-
- PL_reg_eval_set = RS_init;
- DEBUG_EXECUTE_r(DEBUG_s(
- PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n",
- (IV)(PL_stack_sp - PL_stack_base));
- ));
- SAVESTACK_CXPOS();
- cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base;
- /* Otherwise OP_NEXTSTATE will free whatever on stack now. */
- SAVETMPS;
- /* Apparently this is not needed, judging by wantarray. */
- /* SAVEI8(cxstack[cxstack_ix].blk_gimme);
- cxstack[cxstack_ix].blk_gimme = G_SCALAR; */
-
- if (reginfo->sv) {
- /* Make $_ available to executed code. */
- if (reginfo->sv != DEFSV) {
- SAVE_DEFSV;
- DEFSV_set(reginfo->sv);
- }
-
- if (!(SvTYPE(reginfo->sv) >= SVt_PVMG && SvMAGIC(reginfo->sv)
- && (mg = mg_find(reginfo->sv, PERL_MAGIC_regex_global)))) {
- /* prepare for quick setting of pos */
-#ifdef PERL_OLD_COPY_ON_WRITE
- if (SvIsCOW(reginfo->sv))
- sv_force_normal_flags(reginfo->sv, 0);
-#endif
- mg = sv_magicext(reginfo->sv, NULL, PERL_MAGIC_regex_global,
- &PL_vtbl_mglob, NULL, 0);
- mg->mg_len = -1;
- }
- PL_reg_magic = mg;
- PL_reg_oldpos = mg->mg_len;
- SAVEDESTRUCTOR_X(restore_pos, prog);
- }
- if (!PL_reg_curpm) {
- Newxz(PL_reg_curpm, 1, PMOP);
-#ifdef USE_ITHREADS
- {
- SV* const repointer = &PL_sv_undef;
- /* this regexp is also owned by the new PL_reg_curpm, which
- will try to free it. */
- av_push(PL_regex_padav, repointer);
- PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav);
- PL_regex_pad = AvARRAY(PL_regex_padav);
- }
-#endif
- }
-#ifdef USE_ITHREADS
- /* It seems that non-ithreads works both with and without this code.
- So for efficiency reasons it seems best not to have the code
- compiled when it is not needed. */
- /* This is safe against NULLs: */
- ReREFCNT_dec(PM_GETRE(PL_reg_curpm));
- /* PM_reg_curpm owns a reference to this regexp. */
- ReREFCNT_inc(rx);
-#endif
- PM_SETRE(PL_reg_curpm, rx);
- PL_reg_oldcurpm = PL_curpm;
- PL_curpm = PL_reg_curpm;
- if (RXp_MATCH_COPIED(prog)) {
- /* Here is a serious problem: we cannot rewrite subbeg,
- since it may be needed if this match fails. Thus
- $` inside (?{}) could fail... */
- PL_reg_oldsaved = prog->subbeg;
- PL_reg_oldsavedlen = prog->sublen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = prog->saved_copy;
-#endif
- RXp_MATCH_COPIED_off(prog);
- }
- else
- PL_reg_oldsaved = NULL;
- prog->subbeg = PL_bostr;
- prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */
- }
- DEBUG_EXECUTE_r(PL_reg_starttry = *startpos);
- prog->offs[0].start = *startpos - PL_bostr;
- PL_reginput = *startpos;
- PL_reglastparen = &prog->lastparen;
- PL_reglastcloseparen = &prog->lastcloseparen;
- prog->lastparen = 0;
- prog->lastcloseparen = 0;
- PL_regsize = 0;
- PL_regoffs = prog->offs;
- if (PL_reg_start_tmpl <= prog->nparens) {
- PL_reg_start_tmpl = prog->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- /* XXXX What this code is doing here?!!! There should be no need
- to do this again and again, PL_reglastparen should take care of
- this! --ilya*/
-
- /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code.
- * Actually, the code in regcppop() (which Ilya may be meaning by
- * PL_reglastparen), is not needed at all by the test suite
- * (op/regexp, op/pat, op/split), but that code is needed otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * Meanwhile, this code *is* needed for the
- * above-mentioned test suite tests to succeed. The common theme
- * on those tests seems to be returning null fields from matches.
- * --jhi updated by dapm */
-#if 1
- if (prog->nparens) {
- regexp_paren_pair *pp = PL_regoffs;
- register I32 i;
- for (i = prog->nparens; i > (I32)*PL_reglastparen; i--) {
- ++pp;
- pp->start = -1;
- pp->end = -1;
- }
- }
-#endif
- REGCP_SET(lastcp);
- if (regmatch(reginfo, progi->program + 1)) {
- PL_regoffs[0].end = PL_reginput - PL_bostr;
- return 1;
- }
- if (reginfo->cutpoint)
- *startpos= reginfo->cutpoint;
- REGCP_UNWIND(lastcp);
- return 0;
-}
-
-
-#define sayYES goto yes
-#define sayNO goto no
-#define sayNO_SILENT goto no_silent
-
-/* we dont use STMT_START/END here because it leads to
- "unreachable code" warnings, which are bogus, but distracting. */
-#define CACHEsayNO \
- if (ST.cache_mask) \
- PL_reg_poscache[ST.cache_offset] |= ST.cache_mask; \
- sayNO
-
-/* this is used to determine how far from the left messages like
- 'failed...' are printed. It should be set such that messages
- are inline with the regop output that created them.
-*/
-#define REPORT_CODE_OFF 32
-
-
-/* Make sure there is a test for this +1 options in re_tests */
-#define TRIE_INITAL_ACCEPT_BUFFLEN 4;
-
-#define CHRTEST_UNINIT -1001 /* c1/c2 haven't been calculated yet */
-#define CHRTEST_VOID -1000 /* the c1/c2 "next char" test should be skipped */
-
-#define SLAB_FIRST(s) (&(s)->states[0])
-#define SLAB_LAST(s) (&(s)->states[PERL_REGMATCH_SLAB_SLOTS-1])
-
-/* grab a new slab and return the first slot in it */
-
-STATIC regmatch_state *
-S_push_slab(pTHX)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- regmatch_slab *s = PL_regmatch_slab->next;
- if (!s) {
- Newx(s, 1, regmatch_slab);
- s->prev = PL_regmatch_slab;
- s->next = NULL;
- PL_regmatch_slab->next = s;
- }
- PL_regmatch_slab = s;
- return SLAB_FIRST(s);
-}
-
-
-/* push a new state then goto it */
-
-#define PUSH_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_state;
-
-/* push a new state with success backtracking, then goto it */
-
-#define PUSH_YES_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_yes_state;
-
-
-
-/*
-
-regmatch() - main matching routine
-
-This is basically one big switch statement in a loop. We execute an op,
-set 'next' to point the next op, and continue. If we come to a point which
-we may need to backtrack to on failure such as (A|B|C), we push a
-backtrack state onto the backtrack stack. On failure, we pop the top
-state, and re-enter the loop at the state indicated. If there are no more
-states to pop, we return failure.
-
-Sometimes we also need to backtrack on success; for example /A+/, where
-after successfully matching one A, we need to go back and try to
-match another one; similarly for lookahead assertions: if the assertion
-completes successfully, we backtrack to the state just before the assertion
-and then carry on. In these cases, the pushed state is marked as
-'backtrack on success too'. This marking is in fact done by a chain of
-pointers, each pointing to the previous 'yes' state. On success, we pop to
-the nearest yes state, discarding any intermediate failure-only states.
-Sometimes a yes state is pushed just to force some cleanup code to be
-called at the end of a successful match or submatch; e.g. (??{$re}) uses
-it to free the inner regex.
-
-Note that failure backtracking rewinds the cursor position, while
-success backtracking leaves it alone.
-
-A pattern is complete when the END op is executed, while a subpattern
-such as (?=foo) is complete when the SUCCESS op is executed. Both of these
-ops trigger the "pop to last yes state if any, otherwise return true"
-behaviour.
-
-A common convention in this function is to use A and B to refer to the two
-subpatterns (or to the first nodes thereof) in patterns like /A*B/: so A is
-the subpattern to be matched possibly multiple times, while B is the entire
-rest of the pattern. Variable and state names reflect this convention.
-
-The states in the main switch are the union of ops and failure/success of
-substates associated with with that op. For example, IFMATCH is the op
-that does lookahead assertions /(?=A)B/ and so the IFMATCH state means
-'execute IFMATCH'; while IFMATCH_A is a state saying that we have just
-successfully matched A and IFMATCH_A_fail is a state saying that we have
-just failed to match A. Resume states always come in pairs. The backtrack
-state we push is marked as 'IFMATCH_A', but when that is popped, we resume
-at IFMATCH_A or IFMATCH_A_fail, depending on whether we are backtracking
-on success or failure.
-
-The struct that holds a backtracking state is actually a big union, with
-one variant for each major type of op. The variable st points to the
-top-most backtrack struct. To make the code clearer, within each
-block of code we #define ST to alias the relevant union.
-
-Here's a concrete example of a (vastly oversimplified) IFMATCH
-implementation:
-
- switch (state) {
- ....
-
-#define ST st->u.ifmatch
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- ST.foo = ...; // some state we wish to save
- ...
- // push a yes backtrack state with a resume value of
- // IFMATCH_A/IFMATCH_A_fail, then continue execution at the
- // first node of A:
- PUSH_YES_STATE_GOTO(IFMATCH_A, A);
- // NOTREACHED
-
- case IFMATCH_A: // we have successfully executed A; now continue with B
- next = B;
- bar = ST.foo; // do something with the preserved value
- break;
-
- case IFMATCH_A_fail: // A failed, so the assertion failed
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
-
-#undef ST
-
- ...
- }
-
-For any old-timers reading this who are familiar with the old recursive
-approach, the code above is equivalent to:
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- {
- int foo = ...
- ...
- if (regmatch(A)) {
- next = B;
- bar = foo;
- break;
- }
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
- }
-
-The topmost backtrack state, pointed to by st, is usually free. If you
-want to claim it, populate any ST.foo fields in it with values you wish to
-save, then do one of
-
- PUSH_STATE_GOTO(resume_state, node);
- PUSH_YES_STATE_GOTO(resume_state, node);
-
-which sets that backtrack state's resume value to 'resume_state', pushes a
-new free entry to the top of the backtrack stack, then goes to 'node'.
-On backtracking, the free slot is popped, and the saved state becomes the
-new free state. An ST.foo field in this new top state can be temporarily
-accessed to retrieve values, but once the main loop is re-entered, it
-becomes available for reuse.
-
-Note that the depth of the backtrack stack constantly increases during the
-left-to-right execution of the pattern, rather than going up and down with
-the pattern nesting. For example the stack is at its maximum at Z at the
-end of the pattern, rather than at X in the following:
-
- /(((X)+)+)+....(Y)+....Z/
-
-The only exceptions to this are lookahead/behind assertions and the cut,
-(?>A), which pop all the backtrack states associated with A before
-continuing.
-
-Bascktrack state structs are allocated in slabs of about 4K in size.
-PL_regmatch_state and st always point to the currently active state,
-and PL_regmatch_slab points to the slab currently containing
-PL_regmatch_state. The first time regmatch() is called, the first slab is
-allocated, and is never freed until interpreter destruction. When the slab
-is full, a new one is allocated and chained to the end. At exit from
-regmatch(), slabs allocated since entry are freed.
-
-*/
-
-
-#define DEBUG_STATE_pp(pp) \
- DEBUG_STATE_r({ \
- DUMP_EXEC_POS(locinput, scan, do_utf8); \
- PerlIO_printf(Perl_debug_log, \
- " %*s"pp" %s%s%s%s%s\n", \
- depth*2, "", \
- PL_reg_name[st->resume_state], \
- ((st==yes_state||st==mark_state) ? "[" : ""), \
- ((st==yes_state) ? "Y" : ""), \
- ((st==mark_state) ? "M" : ""), \
- ((st==yes_state||st==mark_state) ? "]" : "") \
- ); \
- });
-
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-prog) : -1)
-
-#ifdef DEBUGGING
-
-STATIC void
-S_debug_start_match(pTHX_ const REGEXP *prog, const bool do_utf8,
- const char *start, const char *end, const char *blurb)
-{
- const bool utf8_pat = RX_UTF8(prog) ? 1 : 0;
-
- PERL_ARGS_ASSERT_DEBUG_START_MATCH;
-
- if (!PL_colorset)
- reginitcolors();
- {
- RE_PV_QUOTED_DECL(s0, utf8_pat, PERL_DEBUG_PAD_ZERO(0),
- RX_PRECOMP_const(prog), RX_PRELEN(prog), 60);
-
- RE_PV_QUOTED_DECL(s1, do_utf8, PERL_DEBUG_PAD_ZERO(1),
- start, end - start, 60);
-
- PerlIO_printf(Perl_debug_log,
- "%s%s REx%s %s against %s\n",
- PL_colors[4], blurb, PL_colors[5], s0, s1);
-
- if (do_utf8||utf8_pat)
- PerlIO_printf(Perl_debug_log, "UTF-8 %s%s%s...\n",
- utf8_pat ? "pattern" : "",
- utf8_pat && do_utf8 ? " and " : "",
- do_utf8 ? "string" : ""
- );
- }
-}
-
-STATIC void
-S_dump_exec_pos(pTHX_ const char *locinput,
- const regnode *scan,
- const char *loc_regeol,
- const char *loc_bostr,
- const char *loc_reg_starttry,
- const bool do_utf8)
-{
- const int docolor = *PL_colors[0] || *PL_colors[2] || *PL_colors[4];
- const int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */
- int l = (loc_regeol - locinput) > taill ? taill : (loc_regeol - locinput);
- /* The part of the string before starttry has one color
- (pref0_len chars), between starttry and current
- position another one (pref_len - pref0_len chars),
- after the current position the third one.
- We assume that pref0_len <= pref_len, otherwise we
- decrease pref0_len. */
- int pref_len = (locinput - loc_bostr) > (5 + taill) - l
- ? (5 + taill) - l : locinput - loc_bostr;
- int pref0_len;
-
- PERL_ARGS_ASSERT_DUMP_EXEC_POS;
-
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len)))
- pref_len++;
- pref0_len = pref_len - (locinput - loc_reg_starttry);
- if (l + pref_len < (5 + taill) && l < loc_regeol - locinput)
- l = ( loc_regeol - locinput > (5 + taill) - pref_len
- ? (5 + taill) - pref_len : loc_regeol - locinput);
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput + l)))
- l--;
- if (pref0_len < 0)
- pref0_len = 0;
- if (pref0_len > pref_len)
- pref0_len = pref_len;
- {
- const int is_uni = (do_utf8 && OP(scan) != CANY) ? 1 : 0;
-
- RE_PV_COLOR_DECL(s0,len0,is_uni,PERL_DEBUG_PAD(0),
- (locinput - pref_len),pref0_len, 60, 4, 5);
-
- RE_PV_COLOR_DECL(s1,len1,is_uni,PERL_DEBUG_PAD(1),
- (locinput - pref_len + pref0_len),
- pref_len - pref0_len, 60, 2, 3);
-
- RE_PV_COLOR_DECL(s2,len2,is_uni,PERL_DEBUG_PAD(2),
- locinput, loc_regeol - locinput, 10, 0, 1);
-
- const STRLEN tlen=len0+len1+len2;
- PerlIO_printf(Perl_debug_log,
- "%4"IVdf" <%.*s%.*s%s%.*s>%*s|",
- (IV)(locinput - loc_bostr),
- len0, s0,
- len1, s1,
- (docolor ? "" : "> <"),
- len2, s2,
- (int)(tlen > 19 ? 0 : 19 - tlen),
- "");
- }
-}
-
-#endif
-
-/* reg_check_named_buff_matched()
- * Checks to see if a named buffer has matched. The data array of
- * buffer numbers corresponding to the buffer is expected to reside
- * in the regexp->data->data array in the slot stored in the ARG() of
- * node involved. Note that this routine doesn't actually care about the
- * name, that information is not preserved from compilation to execution.
- * Returns the index of the leftmost defined buffer with the given name
- * or 0 if non of the buffers matched.
- */
-STATIC I32
-S_reg_check_named_buff_matched(pTHX_ const regexp *rex, const regnode *scan)
-{
- I32 n;
- RXi_GET_DECL(rex,rexi);
- SV *sv_dat= MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
-
- PERL_ARGS_ASSERT_REG_CHECK_NAMED_BUFF_MATCHED;
-
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- if ((I32)*PL_reglastparen >= nums[n] &&
- PL_regoffs[nums[n]].end != -1)
- {
- return nums[n];
- }
- }
- return 0;
-}
-
-
-/* free all slabs above current one - called during LEAVE_SCOPE */
-
-STATIC void
-S_clear_backtrack_stack(pTHX_ void *p)
-{
- regmatch_slab *s = PL_regmatch_slab->next;
- PERL_UNUSED_ARG(p);
-
- if (!s)
- return;
- PL_regmatch_slab->next = NULL;
- while (s) {
- regmatch_slab * const osl = s;
- s = s->next;
- Safefree(osl);
- }
-}
-
-
-#define SETREX(Re1,Re2) \
- if (PL_reg_eval_set) PM_SETRE((PL_reg_curpm), (Re2)); \
- Re1 = (Re2)
-
-STATIC I32 /* 0 failure, 1 success */
-S_regmatch(pTHX_ regmatch_info *reginfo, regnode *prog)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- dVAR;
- register const bool do_utf8 = PL_reg_match_utf8;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- REGEXP *rex_sv = reginfo->prog;
- regexp *rex = (struct regexp *)SvANY(rex_sv);
- RXi_GET_DECL(rex,rexi);
- I32 oldsave;
- /* the current state. This is a cached copy of PL_regmatch_state */
- register regmatch_state *st;
- /* cache heavy used fields of st in registers */
- register regnode *scan;
- register regnode *next;
- register U32 n = 0; /* general value; init to avoid compiler warning */
- register I32 ln = 0; /* len or last; init to avoid compiler warning */
- register char *locinput = PL_reginput;
- register I32 nextchr; /* is always set to UCHARAT(locinput) */
-
- bool result = 0; /* return value of S_regmatch */
- int depth = 0; /* depth of backtrack stack */
- U32 nochange_depth = 0; /* depth of GOSUB recursion with nochange */
- const U32 max_nochange_depth =
- (3 * rex->nparens > MAX_RECURSE_EVAL_NOCHANGE_DEPTH) ?
- 3 * rex->nparens : MAX_RECURSE_EVAL_NOCHANGE_DEPTH;
- regmatch_state *yes_state = NULL; /* state to pop to on success of
- subpattern */
- /* mark_state piggy backs on the yes_state logic so that when we unwind
- the stack on success we can update the mark_state as we go */
- regmatch_state *mark_state = NULL; /* last mark state we have seen */
- regmatch_state *cur_eval = NULL; /* most recent EVAL_AB state */
- struct regmatch_state *cur_curlyx = NULL; /* most recent curlyx */
- U32 state_num;
- bool no_final = 0; /* prevent failure from backtracking? */
- bool do_cutgroup = 0; /* no_final only until next branch/trie entry */
- char *startpoint = PL_reginput;
- SV *popmark = NULL; /* are we looking for a mark? */
- SV *sv_commit = NULL; /* last mark name seen in failure */
- SV *sv_yes_mark = NULL; /* last mark name we have seen
- during a successfull match */
- U32 lastopen = 0; /* last open we saw */
- bool has_cutgroup = RX_HAS_CUTGROUP(rex) ? 1 : 0;
- SV* const oreplsv = GvSV(PL_replgv);
- /* these three flags are set by various ops to signal information to
- * the very next op. They have a useful lifetime of exactly one loop
- * iteration, and are not preserved or restored by state pushes/pops
- */
- bool sw = 0; /* the condition value in (?(cond)a|b) */
- bool minmod = 0; /* the next "{n,m}" is a "{n,m}?" */
- int logical = 0; /* the following EVAL is:
- 0: (?{...})
- 1: (?(?{...})X|Y)
- 2: (??{...})
- or the following IFMATCH/UNLESSM is:
- false: plain (?=foo)
- true: used as a condition: (?(?=foo))
- */
-#ifdef DEBUGGING
- GET_RE_DEBUG_FLAGS_DECL;
-#endif
-
- PERL_ARGS_ASSERT_REGMATCH;
-
- DEBUG_OPTIMISE_r( DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,"regmatch start\n");
- }));
- /* on first ever call to regmatch, allocate first slab */
- if (!PL_regmatch_slab) {
- Newx(PL_regmatch_slab, 1, regmatch_slab);
- PL_regmatch_slab->prev = NULL;
- PL_regmatch_slab->next = NULL;
- PL_regmatch_state = SLAB_FIRST(PL_regmatch_slab);
- }
-
- oldsave = PL_savestack_ix;
- SAVEDESTRUCTOR_X(S_clear_backtrack_stack, NULL);
- SAVEVPTR(PL_regmatch_slab);
- SAVEVPTR(PL_regmatch_state);
-
- /* grab next free state slot */
- st = ++PL_regmatch_state;
- if (st > SLAB_LAST(PL_regmatch_slab))
- st = PL_regmatch_state = S_push_slab(aTHX);
-
- /* Note that nextchr is a byte even in UTF */
- nextchr = UCHARAT(locinput);
- scan = prog;
- while (scan != NULL) {
-
- DEBUG_EXECUTE_r( {
- SV * const prop = sv_newmortal();
- regnode *rnext=regnext(scan);
- DUMP_EXEC_POS( locinput, scan, do_utf8 );
- regprop(rex, prop, scan);
-
- PerlIO_printf(Perl_debug_log,
- "%3"IVdf":%*s%s(%"IVdf")\n",
- (IV)(scan - rexi->program), depth*2, "",
- SvPVX_const(prop),
- (PL_regkind[OP(scan)] == END || !rnext) ?
- 0 : (IV)(rnext - rexi->program));
- });
-
- next = scan + NEXT_OFF(scan);
- if (next == scan)
- next = NULL;
- state_num = OP(scan);
-
- REH_CALL_EXEC_NODE_HOOK(rex, scan, reginfo, st);
- reenter_switch:
-
- assert(PL_reglastparen == &rex->lastparen);
- assert(PL_reglastcloseparen == &rex->lastcloseparen);
- assert(PL_regoffs == rex->offs);
-
- switch (state_num) {
- case BOL:
- if (locinput == PL_bostr)
- {
- /* reginfo->till = reginfo->bol; */
- break;
- }
- sayNO;
- case MBOL:
- if (locinput == PL_bostr ||
- ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n'))
- {
- break;
- }
- sayNO;
- case SBOL:
- if (locinput == PL_bostr)
- break;
- sayNO;
- case GPOS:
- if (locinput == reginfo->ganch)
- break;
- sayNO;
-
- case KEEPS:
- /* update the startpoint */
- st->u.keeper.val = PL_regoffs[0].start;
- PL_reginput = locinput;
- PL_regoffs[0].start = locinput - PL_bostr;
- PUSH_STATE_GOTO(KEEPS_next, next);
- /*NOT-REACHED*/
- case KEEPS_next_fail:
- /* rollback the start point change */
- PL_regoffs[0].start = st->u.keeper.val;
- sayNO_SILENT;
- /*NOT-REACHED*/
- case EOL:
- goto seol;
- case MEOL:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- break;
- case SEOL:
- seol:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- if (PL_regeol - locinput > 1)
- sayNO;
- break;
- case EOS:
- if (PL_regeol != locinput)
- sayNO;
- break;
- case SANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
- case CANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case REG_ANY:
- if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n')
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
-
-#undef ST
-#define ST st->u.trie
- case TRIEC:
- /* In this case the charclass data is available inline so
- we can fail fast without a lot of extra overhead.
- */
- if (scan->flags == EXACT || !do_utf8) {
- if(!ANYOF_BITMAP_TEST(scan, *locinput)) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case TRIE:
- {
- /* what type of TRIE am I? (utf8 makes this contextual) */
- DECL_TRIE_TYPE(scan);
-
- /* what trie are we using right now */
- reg_trie_data * const trie
- = (reg_trie_data*)rexi->data->data[ ARG( scan ) ];
- HV * widecharmap = MUTABLE_HV(rexi->data->data[ ARG( scan ) + 1 ]);
- U32 state = trie->startstate;
-
- if (trie->bitmap && trie_type != trie_utf8_fold &&
- !TRIE_BITMAP_TEST(trie,*locinput)
- ) {
- if (trie->states[ state ].wordnum) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %smatched empty string...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- break;
- } else {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- }
- }
-
- {
- U8 *uc = ( U8* )locinput;
-
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- STRLEN bufflen=0;
- SV *sv_accept_buff = NULL;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- ST.accepted = 0; /* how many accepting states we have seen */
- ST.B = next;
- ST.jump = trie->jump;
- ST.me = scan;
- /*
- traverse the TRIE keeping track of all accepting states
- we transition through until we get to a failing node.
- */
-
- while ( state && uc <= (U8*)PL_regeol ) {
- U32 base = trie->states[ state ].trans.base;
- UV uvc = 0;
- U16 charid;
- /* We use charid to hold the wordnum as we don't use it
- for charid until after we have done the wordnum logic.
- We define an alias just so that the wordnum logic reads
- more naturally. */
-
-#define got_wordnum charid
- got_wordnum = trie->states[ state ].wordnum;
-
- if ( got_wordnum ) {
- if ( ! ST.accepted ) {
- ENTER;
- SAVETMPS; /* XXX is this necessary? dmq */
- bufflen = TRIE_INITAL_ACCEPT_BUFFLEN;
- sv_accept_buff=newSV(bufflen *
- sizeof(reg_trie_accepted) - 1);
- SvCUR_set(sv_accept_buff, 0);
- SvPOK_on(sv_accept_buff);
- sv_2mortal(sv_accept_buff);
- SAVETMPS;
- ST.accept_buff =
- (reg_trie_accepted*)SvPV_nolen(sv_accept_buff );
- }
- do {
- if (ST.accepted >= bufflen) {
- bufflen *= 2;
- ST.accept_buff =(reg_trie_accepted*)
- SvGROW(sv_accept_buff,
- bufflen * sizeof(reg_trie_accepted));
- }
- SvCUR_set(sv_accept_buff,SvCUR(sv_accept_buff)
- + sizeof(reg_trie_accepted));
-
-
- ST.accept_buff[ST.accepted].wordnum = got_wordnum;
- ST.accept_buff[ST.accepted].endpos = uc;
- ++ST.accepted;
- } while (trie->nextword && (got_wordnum= trie->nextword[got_wordnum]));
- }
-#undef got_wordnum
-
- DEBUG_TRIE_EXECUTE_r({
- DUMP_EXEC_POS( (char *)uc, scan, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%*s %sState: %4"UVxf" Accepted: %4"UVxf" ",
- 2+depth * 2, "", PL_colors[4],
- (UV)state, (UV)ST.accepted );
- });
-
- if ( base ) {
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
-
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state)
- {
- state = trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next;
- }
- else {
- state = 0;
- }
- uc += len;
-
- }
- else {
- state = 0;
- }
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "Charid:%3x CP:%4"UVxf" After State: %4"UVxf"%s\n",
- charid, uvc, (UV)state, PL_colors[5] );
- );
- }
- if (!ST.accepted )
- sayNO;
-
- DEBUG_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" possible matches%s\n",
- REPORT_CODE_OFF + depth * 2, "",
- PL_colors[4], (IV)ST.accepted, PL_colors[5] );
- );
- }}
- goto trie_first_try; /* jump into the fail handler */
- /* NOTREACHED */
- case TRIE_next_fail: /* we failed - try next alterative */
- if ( ST.jump) {
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- }
- trie_first_try:
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
-
- if ( ST.jump) {
- ST.lastparen = *PL_reglastparen;
- REGCP_SET(ST.cp);
- }
- if ( ST.accepted == 1 ) {
- /* only one choice left - just continue */
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ 0 ].wordnum-1, 0 );
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %sonly one match left: #%d <%s>%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[ 0 ].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- )
- : "not compiled under -Dr",
- PL_colors[5] );
- });
- PL_reginput = (char *)ST.accept_buff[ 0 ].endpos;
- /* in this case we free tmps/leave before we call regmatch
- as we wont be using accept_buff again. */
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- if ( !ST.jump || !ST.jump[ST.accept_buff[0].wordnum])
- scan = ST.B;
- else
- scan = ST.me + ST.jump[ST.accept_buff[0].wordnum];
- if (!has_cutgroup) {
- FREETMPS;
- LEAVE;
- } else {
- ST.accepted--;
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- }
-
- continue; /* execute rest of RE */
- }
-
- if ( !ST.accepted-- ) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sTRIE failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- FREETMPS;
- LEAVE;
- sayNO_SILENT;
- /*NOTREACHED*/
- }
-
- /*
- There are at least two accepting states left. Presumably
- the number of accepting states is going to be low,
- typically two. So we simply scan through to find the one
- with lowest wordnum. Once we find it, we swap the last
- state into its place and decrement the size. We then try to
- match the rest of the pattern at the point where the word
- ends. If we succeed, control just continues along the
- regex; if we fail we return here to try the next accepting
- state
- */
-
- {
- U32 best = 0;
- U32 cur;
- for( cur = 1 ; cur <= ST.accepted ; cur++ ) {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" (%d) as best, looking at %"IVdf" (%d)%s\n",
- REPORT_CODE_OFF + depth * 2, "", PL_colors[4],
- (IV)best, ST.accept_buff[ best ].wordnum, (IV)cur,
- ST.accept_buff[ cur ].wordnum, PL_colors[5] );
- );
-
- if (ST.accept_buff[cur].wordnum <
- ST.accept_buff[best].wordnum)
- best = cur;
- }
-
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ best ].wordnum - 1, 0 );
- regnode *nextop=(!ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) ?
- ST.B :
- ST.me + ST.jump[ST.accept_buff[best].wordnum];
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %strying alternation #%d <%s> at node #%d %s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[best].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- ) : "not compiled under -Dr",
- REG_NODE_NUM(nextop),
- PL_colors[5] );
- });
-
- if ( best<ST.accepted ) {
- reg_trie_accepted tmp = ST.accept_buff[ best ];
- ST.accept_buff[ best ] = ST.accept_buff[ ST.accepted ];
- ST.accept_buff[ ST.accepted ] = tmp;
- best = ST.accepted;
- }
- PL_reginput = (char *)ST.accept_buff[ best ].endpos;
- if ( !ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) {
- scan = ST.B;
- } else {
- scan = ST.me + ST.jump[ST.accept_buff[best].wordnum];
- }
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- /* NOTREACHED */
- }
- /* NOTREACHED */
- case TRIE_next:
- /* we dont want to throw this away, see bug 57042*/
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- FREETMPS;
- LEAVE;
- sayYES;
-#undef ST
-
- case EXACT: {
- char *s = STRING(scan);
- ln = STR_LEN(scan);
- if (do_utf8 != UTF) {
- /* The target and the pattern have differing utf8ness. */
- char *l = locinput;
- const char * const e = s + ln;
-
- if (do_utf8) {
- /* The target is utf8, the pattern is not utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*(U8*)s) !=
- utf8n_to_uvuni((U8*)l, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- l += ulen;
- s ++;
- }
- }
- else {
- /* The target is not utf8, the pattern is utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*((U8*)l)) !=
- utf8n_to_uvuni((U8*)s, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- s += ulen;
- l ++;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
- /* The target and the pattern have the same utf8ness. */
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr)
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && memNE(s, locinput, ln))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case EXACTFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case EXACTF: {
- char * const s = STRING(scan);
- ln = STR_LEN(scan);
-
- if (do_utf8 || UTF) {
- /* Either target or the pattern are utf8. */
- const char * const l = locinput;
- char *e = PL_regeol;
-
- if (ibcmp_utf8(s, 0, ln, (bool)UTF,
- l, &e, 0, do_utf8)) {
- /* One more case for the sharp s:
- * pack("U0U*", 0xDF) =~ /ss/i,
- * the 0xC3 0x9F are the UTF-8
- * byte sequence for the U+00DF. */
-
- if (!(do_utf8 &&
- toLOWER(s[0]) == 's' &&
- ln >= 2 &&
- toLOWER(s[1]) == 's' &&
- (U8)l[0] == 0xC3 &&
- e - l >= 2 &&
- (U8)l[1] == 0x9F))
- sayNO;
- }
- locinput = e;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Neither the target and the pattern are utf8. */
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- UCHARAT(s) != ((OP(scan) == EXACTF)
- ? PL_fold : PL_fold_locale)[nextchr])
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && (OP(scan) == EXACTF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln)))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case BOUNDL:
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- case NBOUND:
- /* was last char in word? */
- if (do_utf8) {
- if (locinput == PL_bostr)
- ln = '\n';
- else {
- const U8 * const r = reghop3((U8*)locinput, -1, (U8*)PL_bostr);
-
- ln = utf8n_to_uvchr(r, UTF8SKIP(r), 0, uniflags);
- }
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM_uni(ln);
- LOAD_UTF8_CHARCLASS_ALNUM();
- n = swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8);
- }
- else {
- ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln));
- n = isALNUM_LC_utf8((U8*)locinput);
- }
- }
- else {
- ln = (locinput != PL_bostr) ?
- UCHARAT(locinput - 1) : '\n';
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM(ln);
- n = isALNUM(nextchr);
- }
- else {
- ln = isALNUM_LC(ln);
- n = isALNUM_LC(nextchr);
- }
- }
- if (((!ln) == (!n)) == (OP(scan) == BOUND ||
- OP(scan) == BOUNDL))
- sayNO;
- break;
- case ANYOF:
- if (do_utf8) {
- STRLEN inclasslen = PL_regeol - locinput;
-
- if (!reginclass(rex, scan, (U8*)locinput, &inclasslen, do_utf8))
- goto anyof_fail;
- if (locinput >= PL_regeol)
- sayNO;
- locinput += inclasslen ? inclasslen : UTF8SKIP(locinput);
- nextchr = UCHARAT(locinput);
- break;
- }
- else {
- if (nextchr < 0)
- nextchr = UCHARAT(locinput);
- if (!REGINCLASS(rex, scan, (U8*)locinput))
- goto anyof_fail;
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- }
- anyof_fail:
- /* If we might have the case of the German sharp s
- * in a casefolding Unicode character class. */
-
- if (ANYOF_FOLD_SHARP_S(scan, locinput, PL_regeol)) {
- locinput += SHARP_S_SKIP;
- nextchr = UCHARAT(locinput);
- }
- else
- sayNO;
- break;
- /* Special char classes - The defines start on line 129 or so */
- CCC_TRY_AFF( ALNUM, ALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
- CCC_TRY_NEG(NALNUM, NALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
-
- CCC_TRY_AFF( SPACE, SPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
- CCC_TRY_NEG(NSPACE, NSPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
-
- CCC_TRY_AFF( DIGIT, DIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
- CCC_TRY_NEG(NDIGIT, NDIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
-
- case CLUMP:
- if (locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- LOAD_UTF8_CHARCLASS_MARK();
- if (swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8))
- sayNO;
- locinput += PL_utf8skip[nextchr];
- while (locinput < PL_regeol &&
- swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8))
- locinput += UTF8SKIP(locinput);
- if (locinput > PL_regeol)
- sayNO;
- }
- else
- locinput++;
- nextchr = UCHARAT(locinput);
- break;
-
- case NREFFL:
- {
- char *s;
- char type;
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NREF:
- case NREFF:
- type = OP(scan);
- n = reg_check_named_buff_matched(rex,scan);
-
- if ( n ) {
- type = REF + ( type - NREF );
- goto do_ref;
- } else {
- sayNO;
- }
- /* unreached */
- case REFFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case REF:
- case REFF:
- n = ARG(scan); /* which paren pair */
- type = OP(scan);
- do_ref:
- ln = PL_regoffs[n].start;
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (*PL_reglastparen < n || ln == -1)
- sayNO; /* Do not match unless seen CLOSEn. */
- if (ln == PL_regoffs[n].end)
- break;
-
- s = PL_bostr + ln;
- if (do_utf8 && type != REF) { /* REF can do byte comparison */
- char *l = locinput;
- const char *e = PL_bostr + PL_regoffs[n].end;
- /*
- * Note that we can't do the "other character" lookup trick as
- * in the 8-bit case (no pun intended) because in Unicode we
- * have to map both upper and title case to lower case.
- */
- if (type == REFF) {
- while (s < e) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- if (l >= PL_regeol)
- sayNO;
- toLOWER_utf8((U8*)s, tmpbuf1, &ulen1);
- toLOWER_utf8((U8*)l, tmpbuf2, &ulen2);
- if (ulen1 != ulen2 || memNE((char *)tmpbuf1, (char *)tmpbuf2, ulen1))
- sayNO;
- s += ulen1;
- l += ulen2;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- (type == REF ||
- (UCHARAT(s) != (type == REFF
- ? PL_fold : PL_fold_locale)[nextchr])))
- sayNO;
- ln = PL_regoffs[n].end - ln;
- if (locinput + ln > PL_regeol)
- sayNO;
- if (ln > 1 && (type == REF
- ? memNE(s, locinput, ln)
- : (type == REFF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln))))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case NOTHING:
- case TAIL:
- break;
- case BACK:
- break;
-
-#undef ST
-#define ST st->u.eval
- {
- SV *ret;
- REGEXP *re_sv;
- regexp *re;
- regexp_internal *rei;
- regnode *startpoint;
-
- case GOSTART:
- case GOSUB: /* /(...(?1))/ /(...(?&foo))/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if (cur_eval->u.eval.close_paren == (U32)ARG(scan))
- Perl_croak(aTHX_ "Infinite recursion in regex");
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_
- "Pattern subroutine nesting without pos change"
- " exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- re_sv = rex_sv;
- re = rex;
- rei = rexi;
- (void)ReREFCNT_inc(rex_sv);
- if (OP(scan)==GOSUB) {
- startpoint = scan + ARG2L(scan);
- ST.close_paren = ARG(scan);
- } else {
- startpoint = rei->program+1;
- ST.close_paren = 0;
- }
- goto eval_recurse_doit;
- /* NOTREACHED */
- case EVAL: /* /(?{A})B/ /(??{A})B/ and /(?(?{A})X|Y)B/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_ "EVAL without pos change exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- {
- /* execute the code in the {...} */
- dSP;
- SV ** const before = SP;
- OP_4tree * const oop = PL_op;
- COP * const ocurcop = PL_curcop;
- PAD *old_comppad;
- char *saved_regeol = PL_regeol;
-
- n = ARG(scan);
- PL_op = (OP_4tree*)rexi->data->data[n];
- DEBUG_STATE_r( PerlIO_printf(Perl_debug_log,
- " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) );
- PAD_SAVE_LOCAL(old_comppad, (PAD*)rexi->data->data[n + 2]);
- PL_regoffs[0].end = PL_reg_magic->mg_len = locinput - PL_bostr;
-
- if (sv_yes_mark) {
- SV *sv_mrk = get_sv("REGMARK", 1);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- CALLRUNOPS(aTHX); /* Scalar context. */
- SPAGAIN;
- if (SP == before)
- ret = &PL_sv_undef; /* protect against empty (?{}) blocks. */
- else {
- ret = POPs;
- PUTBACK;
- }
-
- PL_op = oop;
- PAD_RESTORE_LOCAL(old_comppad);
- PL_curcop = ocurcop;
- PL_regeol = saved_regeol;
- if (!logical) {
- /* /(?{...})/ */
- sv_setsv(save_scalar(PL_replgv), ret);
- break;
- }
- }
- if (logical == 2) { /* Postponed subexpression: /(??{...})/ */
- logical = 0;
- {
- /* extract RE object from returned value; compiling if
- * necessary */
- MAGIC *mg = NULL;
- REGEXP *rx = NULL;
-
- if (SvROK(ret)) {
- SV *const sv = SvRV(ret);
-
- if (SvTYPE(sv) == SVt_REGEXP) {
- rx = (REGEXP*) sv;
- } else if (SvSMAGICAL(sv)) {
- mg = mg_find(sv, PERL_MAGIC_qr);
- assert(mg);
- }
- } else if (SvTYPE(ret) == SVt_REGEXP) {
- rx = (REGEXP*) ret;
- } else if (SvSMAGICAL(ret)) {
- if (SvGMAGICAL(ret)) {
- /* I don't believe that there is ever qr magic
- here. */
- assert(!mg_find(ret, PERL_MAGIC_qr));
- sv_unmagic(ret, PERL_MAGIC_qr);
- }
- else {
- mg = mg_find(ret, PERL_MAGIC_qr);
- /* testing suggests mg only ends up non-NULL for
- scalars who were upgraded and compiled in the
- else block below. In turn, this is only
- triggered in the "postponed utf8 string" tests
- in t/op/pat.t */
- }
- }
-
- if (mg) {
- rx = (REGEXP *) mg->mg_obj; /*XXX:dmq*/
- assert(rx);
- }
- if (rx) {
- rx = reg_temp_copy(rx);
- }
- else {
- U32 pm_flags = 0;
- const I32 osize = PL_regsize;
-
- if (DO_UTF8(ret)) {
- assert (SvUTF8(ret));
- } else if (SvUTF8(ret)) {
- /* Not doing UTF-8, despite what the SV says. Is
- this only if we're trapped in use 'bytes'? */
- /* Make a copy of the octet sequence, but without
- the flag on, as the compiler now honours the
- SvUTF8 flag on ret. */
- STRLEN len;
- const char *const p = SvPV(ret, len);
- ret = newSVpvn_flags(p, len, SVs_TEMP);
- }
- rx = CALLREGCOMP(ret, pm_flags);
- if (!(SvFLAGS(ret)
- & (SVs_TEMP | SVs_PADTMP | SVf_READONLY
- | SVs_GMG))) {
- /* This isn't a first class regexp. Instead, it's
- caching a regexp onto an existing, Perl visible
- scalar. */
- sv_magic(ret, MUTABLE_SV(rx), PERL_MAGIC_qr, 0, 0);
- }
- PL_regsize = osize;
- }
- re_sv = rx;
- re = (struct regexp *)SvANY(rx);
- }
- RXp_MATCH_COPIED_off(re);
- re->subbeg = rex->subbeg;
- re->sublen = rex->sublen;
- rei = RXi_GET(re);
- DEBUG_EXECUTE_r(
- debug_start_match(re_sv, do_utf8, locinput, PL_regeol,
- "Matching embedded");
- );
- startpoint = rei->program + 1;
- ST.close_paren = 0; /* only used for GOSUB */
- /* borrowed from regtry */
- if (PL_reg_start_tmpl <= re->nparens) {
- PL_reg_start_tmpl = re->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- eval_recurse_doit: /* Share code with GOSUB below this line */
- /* run the pattern returned from (??{...}) */
- ST.cp = regcppush(0); /* Save *all* the positions. */
- REGCP_SET(ST.lastcp);
-
- PL_regoffs = re->offs; /* essentially NOOP on GOSUB */
-
- /* see regtry, specifically PL_reglast(?:close)?paren is a pointer! (i dont know why) :dmq */
- PL_reglastparen = &re->lastparen;
- PL_reglastcloseparen = &re->lastcloseparen;
- re->lastparen = 0;
- re->lastcloseparen = 0;
-
- PL_reginput = locinput;
- PL_regsize = 0;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
-
- ST.toggle_reg_flags = PL_reg_flags;
- if (RX_UTF8(re_sv))
- PL_reg_flags |= RF_utf8;
- else
- PL_reg_flags &= ~RF_utf8;
- ST.toggle_reg_flags ^= PL_reg_flags; /* diff of old and new */
-
- ST.prev_rex = rex_sv;
- ST.prev_curlyx = cur_curlyx;
- SETREX(rex_sv,re_sv);
- rex = re;
- rexi = rei;
- cur_curlyx = NULL;
- ST.B = next;
- ST.prev_eval = cur_eval;
- cur_eval = st;
- /* now continue from first node in postoned RE */
- PUSH_YES_STATE_GOTO(EVAL_AB, startpoint);
- /* NOTREACHED */
- }
- /* logical is 1, /(?(?{...})X|Y)/ */
- sw = (bool)SvTRUE(ret);
- logical = 0;
- break;
- }
-
- case EVAL_AB: /* cleanup after a successful (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- regcpblow(ST.cp);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
- /* also update PL_regoffs */
- PL_regoffs = rex->offs;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayYES;
-
-
- case EVAL_AB_fail: /* unsuccessfully ran A or B in (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- PL_reginput = locinput;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayNO_SILENT;
-#undef ST
-
- case OPEN:
- n = ARG(scan); /* which paren pair */
- PL_reg_start_tmp[n] = locinput;
- if (n > PL_regsize)
- PL_regsize = n;
- lastopen = n;
- break;
- case CLOSE:
- n = ARG(scan); /* which paren pair */
- PL_regoffs[n].start = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if (cur_eval && cur_eval->u.eval.close_paren == n) {
- goto fake_end;
- }
- break;
- case ACCEPT:
- if (ARG(scan)){
- regnode *cursor;
- for (cursor=scan;
- cursor && OP(cursor)!=END;
- cursor=regnext(cursor))
- {
- if ( OP(cursor)==CLOSE ){
- n = ARG(cursor);
- if ( n <= lastopen ) {
- PL_regoffs[n].start
- = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if ( n == ARG(scan) || (cur_eval &&
- cur_eval->u.eval.close_paren == n))
- break;
- }
- }
- }
- }
- goto fake_end;
- /*NOTREACHED*/
- case GROUPP:
- n = ARG(scan); /* which paren pair */
- sw = (bool)(*PL_reglastparen >= n && PL_regoffs[n].end != -1);
- break;
- case NGROUPP:
- /* reg_check_named_buff_matched returns 0 for no match */
- sw = (bool)(0 < reg_check_named_buff_matched(rex,scan));
- break;
- case INSUBP:
- n = ARG(scan);
- sw = (cur_eval && (!n || cur_eval->u.eval.close_paren == n));
- break;
- case DEFINEP:
- sw = 0;
- break;
- case IFTHEN:
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (sw)
- next = NEXTOPER(NEXTOPER(scan));
- else {
- next = scan + ARG(scan);
- if (OP(next) == IFTHEN) /* Fake one. */
- next = NEXTOPER(NEXTOPER(next));
- }
- break;
- case LOGICAL:
- logical = scan->flags;
- break;
-
-/*******************************************************************
-
-The CURLYX/WHILEM pair of ops handle the most generic case of the /A*B/
-pattern, where A and B are subpatterns. (For simple A, CURLYM or
-STAR/PLUS/CURLY/CURLYN are used instead.)
-
-A*B is compiled as <CURLYX><A><WHILEM><B>
-
-On entry to the subpattern, CURLYX is called. This pushes a CURLYX
-state, which contains the current count, initialised to -1. It also sets
-cur_curlyx to point to this state, with any previous value saved in the
-state block.
-
-CURLYX then jumps straight to the WHILEM op, rather than executing A,
-since the pattern may possibly match zero times (i.e. it's a while {} loop
-rather than a do {} while loop).
-
-Each entry to WHILEM represents a successful match of A. The count in the
-CURLYX block is incremented, another WHILEM state is pushed, and execution
-passes to A or B depending on greediness and the current count.
-
-For example, if matching against the string a1a2a3b (where the aN are
-substrings that match /A/), then the match progresses as follows: (the
-pushed states are interspersed with the bits of strings matched so far):
-
- <CURLYX cnt=-1>
- <CURLYX cnt=0><WHILEM>
- <CURLYX cnt=1><WHILEM> a1 <WHILEM>
- <CURLYX cnt=2><WHILEM> a1 <WHILEM> a2 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> b
-
-(Contrast this with something like CURLYM, which maintains only a single
-backtrack state:
-
- <CURLYM cnt=0> a1
- a1 <CURLYM cnt=1> a2
- a1 a2 <CURLYM cnt=2> a3
- a1 a2 a3 <CURLYM cnt=3> b
-)
-
-Each WHILEM state block marks a point to backtrack to upon partial failure
-of A or B, and also contains some minor state data related to that
-iteration. The CURLYX block, pointed to by cur_curlyx, contains the
-overall state, such as the count, and pointers to the A and B ops.
-
-This is complicated slightly by nested CURLYX/WHILEM's. Since cur_curlyx
-must always point to the *current* CURLYX block, the rules are:
-
-When executing CURLYX, save the old cur_curlyx in the CURLYX state block,
-and set cur_curlyx to point the new block.
-
-When popping the CURLYX block after a successful or unsuccessful match,
-restore the previous cur_curlyx.
-
-When WHILEM is about to execute B, save the current cur_curlyx, and set it
-to the outer one saved in the CURLYX block.
-
-When popping the WHILEM block after a successful or unsuccessful B match,
-restore the previous cur_curlyx.
-
-Here's an example for the pattern (AI* BI)*BO
-I and O refer to inner and outer, C and W refer to CURLYX and WHILEM:
-
-cur_
-curlyx backtrack stack
------- ---------------
-NULL
-CO <CO prev=NULL> <WO>
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-NULL <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi <WO prev=CO> bo
-
-At this point the pattern succeeds, and we work back down the stack to
-clean up, restoring as we go:
-
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO>
-NULL
-
-*******************************************************************/
-
-#define ST st->u.curlyx
-
- case CURLYX: /* start of /A*B/ (for complex A) */
- {
- /* No need to save/restore up to this paren */
- I32 parenfloor = scan->flags;
-
- assert(next); /* keep Coverity happy */
- if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */
- next += ARG(next);
-
- /* XXXX Probably it is better to teach regpush to support
- parenfloor > PL_regsize... */
- if (parenfloor > (I32)*PL_reglastparen)
- parenfloor = *PL_reglastparen; /* Pessimization... */
-
- ST.prev_curlyx= cur_curlyx;
- cur_curlyx = st;
- ST.cp = PL_savestack_ix;
-
- /* these fields contain the state of the current curly.
- * they are accessed by subsequent WHILEMs */
- ST.parenfloor = parenfloor;
- ST.min = ARG1(scan);
- ST.max = ARG2(scan);
- ST.A = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- ST.B = next;
- ST.minmod = minmod;
- minmod = 0;
- ST.count = -1; /* this will be updated by WHILEM */
- ST.lastloc = NULL; /* this will be updated by WHILEM */
-
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYX_end, PREVOPER(next));
- /* NOTREACHED */
- }
-
- case CURLYX_end: /* just finished matching all of A*B */
- cur_curlyx = ST.prev_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case CURLYX_end_fail: /* just failed to match all of A*B */
- regcpblow(ST.cp);
- cur_curlyx = ST.prev_curlyx;
- sayNO;
- /* NOTREACHED */
-
-
-#undef ST
-#define ST st->u.whilem
-
- case WHILEM: /* just matched an A in /A*B/ (for complex A) */
- {
- /* see the discussion above about CURLYX/WHILEM */
- I32 n;
- assert(cur_curlyx); /* keep Coverity happy */
- n = ++cur_curlyx->u.curlyx.count; /* how many A's matched */
- ST.save_lastloc = cur_curlyx->u.curlyx.lastloc;
- ST.cache_offset = 0;
- ST.cache_mask = 0;
-
- PL_reginput = locinput;
-
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: matched %ld out of %ld..%ld\n",
- REPORT_CODE_OFF+depth*2, "", (long)n,
- (long)cur_curlyx->u.curlyx.min,
- (long)cur_curlyx->u.curlyx.max)
- );
-
- /* First just match a string of min A's. */
-
- if (n < cur_curlyx->u.curlyx.min) {
- cur_curlyx->u.curlyx.lastloc = locinput;
- PUSH_STATE_GOTO(WHILEM_A_pre, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
-
- /* If degenerate A matches "", assume A done. */
-
- if (locinput == cur_curlyx->u.curlyx.lastloc) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: empty match detected, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- goto do_whilem_B_max;
- }
-
- /* super-linear cache processing */
-
- if (scan->flags) {
-
- if (!PL_reg_maxiter) {
- /* start the countdown: Postpone detection until we
- * know the match is not *that* much linear. */
- PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4);
- /* possible overflow for long strings and many CURLYX's */
- if (PL_reg_maxiter < 0)
- PL_reg_maxiter = I32_MAX;
- PL_reg_leftiter = PL_reg_maxiter;
- }
-
- if (PL_reg_leftiter-- == 0) {
- /* initialise cache */
- const I32 size = (PL_reg_maxiter + 7)/8;
- if (PL_reg_poscache) {
- if ((I32)PL_reg_poscache_size < size) {
- Renew(PL_reg_poscache, size, char);
- PL_reg_poscache_size = size;
- }
- Zero(PL_reg_poscache, size, char);
- }
- else {
- PL_reg_poscache_size = size;
- Newxz(PL_reg_poscache, size, char);
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%swhilem: Detected a super-linear match, switching on caching%s...\n",
- PL_colors[4], PL_colors[5])
- );
- }
-
- if (PL_reg_leftiter < 0) {
- /* have we already failed at this position? */
- I32 offset, mask;
- offset = (scan->flags & 0xf) - 1
- + (locinput - PL_bostr) * (scan->flags>>4);
- mask = 1 << (offset % 8);
- offset /= 8;
- if (PL_reg_poscache[offset] & mask) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: (cache) already tried at this position...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- sayNO; /* cache records failure */
- }
- ST.cache_offset = offset;
- ST.cache_mask = mask;
- }
- }
-
- /* Prefer B over A for minimal matching. */
-
- if (cur_curlyx->u.curlyx.minmod) {
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- ST.cp = regcppush(ST.save_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_YES_STATE_GOTO(WHILEM_B_min, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
- }
-
- /* Prefer A over B for maximal matching. */
-
- if (n < cur_curlyx->u.curlyx.max) { /* More greed allowed? */
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- cur_curlyx->u.curlyx.lastloc = locinput;
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_max, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
- goto do_whilem_B_max;
- }
- /* NOTREACHED */
-
- case WHILEM_B_min: /* just matched B in a minimal match */
- case WHILEM_B_max: /* just matched B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case WHILEM_B_max_fail: /* just failed to match B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_min_fail: /* just failed to match A in a minimal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- /* FALL THROUGH */
- case WHILEM_A_pre_fail: /* just failed to match even minimal A */
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_max_fail: /* just failed to match A in a maximal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex); /* Restore some previous $<digit>s? */
- PL_reginput = locinput;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s whilem: failed, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- do_whilem_B_max:
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
-
- /* now try B */
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- PUSH_YES_STATE_GOTO(WHILEM_B_max, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
-
- case WHILEM_B_min_fail: /* just failed to match B in a minimal match */
- cur_curlyx = ST.save_curlyx;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
-
- if (cur_curlyx->u.curlyx.count >= cur_curlyx->u.curlyx.max) {
- /* Maximum greed exceeded */
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP),
- "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s trying longer...\n", REPORT_CODE_OFF+depth*2, "")
- );
- /* Try grabbing another A and see if it helps. */
- PL_reginput = locinput;
- cur_curlyx->u.curlyx.lastloc = locinput;
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_min, ST.save_curlyx->u.curlyx.A);
- /* NOTREACHED */
-
-#undef ST
-#define ST st->u.branch
-
- case BRANCHJ: /* /(...|A|...)/ with long next pointer */
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- scan = NEXTOPER(scan);
- /* FALL THROUGH */
-
- case BRANCH: /* /(...|A|...)/ */
- scan = NEXTOPER(scan); /* scan now points to inner node */
- ST.lastparen = *PL_reglastparen;
- ST.next_branch = next;
- REGCP_SET(ST.cp);
- PL_reginput = locinput;
-
- /* Now go into the branch */
- if (has_cutgroup) {
- PUSH_YES_STATE_GOTO(BRANCH_next, scan);
- } else {
- PUSH_STATE_GOTO(BRANCH_next, scan);
- }
- /* NOTREACHED */
- case CUTGROUP:
- PL_reginput = locinput;
- sv_yes_mark = st->u.mark.mark_name = scan->flags ? NULL :
- MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(CUTGROUP_next,next);
- /* NOTREACHED */
- case CUTGROUP_next_fail:
- do_cutgroup = 1;
- no_final = 1;
- if (st->u.mark.mark_name)
- sv_commit = st->u.mark.mark_name;
- sayNO;
- /* NOTREACHED */
- case BRANCH_next:
- sayYES;
- /* NOTREACHED */
- case BRANCH_next_fail: /* that branch failed; try the next, if any */
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- /*dmq: *PL_reglastcloseparen = n; */
- scan = ST.next_branch;
- /* no more branches? */
- if (!scan || (OP(scan) != BRANCH && OP(scan) != BRANCHJ)) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sBRANCH failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- sayNO_SILENT;
- }
- continue; /* execute next BRANCH[J] op */
- /* NOTREACHED */
-
- case MINMOD:
- minmod = 1;
- break;
-
-#undef ST
-#define ST st->u.curlym
-
- case CURLYM: /* /A{m,n}B/ where A is fixed-length */
-
- /* This is an optimisation of CURLYX that enables us to push
- * only a single backtracking state, no matter how many matches
- * there are in {m,n}. It relies on the pattern being constant
- * length, with no parens to influence future backrefs
- */
-
- ST.me = scan;
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
-
- /* if paren positive, emulate an OPEN/CLOSE around A */
- if (ST.me->flags) {
- U32 paren = ST.me->flags;
- if (paren > PL_regsize)
- PL_regsize = paren;
- if (paren > *PL_reglastparen)
- *PL_reglastparen = paren;
- scan += NEXT_OFF(scan); /* Skip former OPEN. */
- }
- ST.A = scan;
- ST.B = next;
- ST.alen = 0;
- ST.count = 0;
- ST.minmod = minmod;
- minmod = 0;
- ST.c1 = CHRTEST_UNINIT;
- REGCP_SET(ST.cp);
-
- if (!(ST.minmod ? ARG1(ST.me) : ARG2(ST.me))) /* min/max */
- goto curlym_do_B;
-
- curlym_do_A: /* execute the A in /A{m,n}B/ */
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYM_A, ST.A); /* match A */
- /* NOTREACHED */
-
- case CURLYM_A: /* we've just matched an A */
- locinput = st->locinput;
- nextchr = UCHARAT(locinput);
-
- ST.count++;
- /* after first match, determine A's length: u.curlym.alen */
- if (ST.count == 1) {
- if (PL_reg_match_utf8) {
- char *s = locinput;
- while (s < PL_reginput) {
- ST.alen++;
- s += UTF8SKIP(s);
- }
- }
- else {
- ST.alen = PL_reginput - locinput;
- }
- if (ST.alen == 0)
- ST.count = ST.minmod ? ARG1(ST.me) : ARG2(ST.me);
- }
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM now matched %"IVdf" times, len=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)), "",
- (IV) ST.count, (IV)ST.alen)
- );
-
- locinput = PL_reginput;
-
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- goto fake_end;
-
- {
- I32 max = (ST.minmod ? ARG1(ST.me) : ARG2(ST.me));
- if ( max == REG_INFTY || ST.count < max )
- goto curlym_do_A; /* try to match another A */
- }
- goto curlym_do_B; /* try to match B */
-
- case CURLYM_A_fail: /* just failed to match an A */
- REGCP_UNWIND(ST.cp);
-
- if (ST.minmod || ST.count < ARG1(ST.me) /* min*/
- || (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags))
- sayNO;
-
- curlym_do_B: /* execute the B in /A{m,n}B/ */
- PL_reginput = locinput;
- if (ST.c1 == CHRTEST_UNINIT) {
- /* calculate c1 and c2 for possible match of 1st char
- * following curly */
- ST.c1 = ST.c2 = CHRTEST_VOID;
- if (HAS_TEXT(ST.B) || JUMPABLE(ST.B)) {
- regnode *text_node = ST.B;
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
- /* this used to be
-
- (HAS_TEXT(text_node) && PL_regkind[OP(text_node)] == EXACT)
-
- But the former is redundant in light of the latter.
-
- if this changes back then the macro for
- IS_TEXT and friends need to change.
- */
- if (PL_regkind[OP(text_node)] == EXACT)
- {
-
- ST.c1 = (U8)*STRING(text_node);
- ST.c2 =
- (IS_TEXTF(text_node))
- ? PL_fold[ST.c1]
- : (IS_TEXTFL(text_node))
- ? PL_fold_locale[ST.c1]
- : ST.c1;
- }
- }
- }
-
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM trying tail with matches=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)),
- "", (IV)ST.count)
- );
- if (ST.c1 != CHRTEST_VOID
- && UCHARAT(PL_reginput) != ST.c1
- && UCHARAT(PL_reginput) != ST.c2)
- {
- /* simulate B failing */
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM Fast bail c1=%"IVdf" c2=%"IVdf"\n",
- (int)(REPORT_CODE_OFF+(depth*2)),"",
- (IV)ST.c1,(IV)ST.c2
- ));
- state_num = CURLYM_B_fail;
- goto reenter_switch;
- }
-
- if (ST.me->flags) {
- /* mark current A as captured */
- I32 paren = ST.me->flags;
- if (ST.count) {
- PL_regoffs[paren].start
- = HOPc(PL_reginput, -ST.alen) - PL_bostr;
- PL_regoffs[paren].end = PL_reginput - PL_bostr;
- /*dmq: *PL_reglastcloseparen = paren; */
- }
- else
- PL_regoffs[paren].end = -1;
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- {
- if (ST.count)
- goto fake_end;
- else
- sayNO;
- }
- }
-
- PUSH_STATE_GOTO(CURLYM_B, ST.B); /* match B */
- /* NOTREACHED */
-
- case CURLYM_B_fail: /* just failed to match a B */
- REGCP_UNWIND(ST.cp);
- if (ST.minmod) {
- I32 max = ARG2(ST.me);
- if (max != REG_INFTY && ST.count == max)
- sayNO;
- goto curlym_do_A; /* try to match a further A */
- }
- /* backtrack one A */
- if (ST.count == ARG1(ST.me) /* min */)
- sayNO;
- ST.count--;
- locinput = HOPc(locinput, -ST.alen);
- goto curlym_do_B; /* try to match B */
-
-#undef ST
-#define ST st->u.curly
-
-#define CURLY_SETPAREN(paren, success) \
- if (paren) { \
- if (success) { \
- PL_regoffs[paren].start = HOPc(locinput, -1) - PL_bostr; \
- PL_regoffs[paren].end = locinput - PL_bostr; \
- *PL_reglastcloseparen = paren; \
- } \
- else \
- PL_regoffs[paren].end = -1; \
- }
-
- case STAR: /* /A*B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 0;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case PLUS: /* /A+B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 1;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case CURLYN: /* /(A){m,n}B/ where A is width 1 */
- ST.paren = scan->flags; /* Which paren to set */
- if (ST.paren > PL_regsize)
- PL_regsize = ST.paren;
- if (ST.paren > *PL_reglastparen)
- *PL_reglastparen = ST.paren;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- ST.min=1;
- ST.max=1;
- }
- scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE);
- goto repeat;
- case CURLY: /* /A{m,n}B/ where A is width 1 */
- ST.paren = 0;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
- repeat:
- /*
- * Lookahead to avoid useless match attempts
- * when we know what character comes next.
- *
- * Used to only do .*x and .*?x, but now it allows
- * for )'s, ('s and (?{ ... })'s to be in the way
- * of the quantifier and the EXACT-like node. -- japhy
- */
-
- if (ST.min > ST.max) /* XXX make this a compile-time check? */
- sayNO;
- if (HAS_TEXT(next) || JUMPABLE(next)) {
- U8 *s;
- regnode *text_node = next;
-
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
-
- if (! HAS_TEXT(text_node))
- ST.c1 = ST.c2 = CHRTEST_VOID;
- else {
- if ( PL_regkind[OP(text_node)] != EXACT ) {
- ST.c1 = ST.c2 = CHRTEST_VOID;
- goto assume_ok_easy;
- }
- else
- s = (U8*)STRING(text_node);
-
- /* Currently we only get here when
-
- PL_rekind[OP(text_node)] == EXACT
-
- if this changes back then the macro for IS_TEXT and
- friends need to change. */
- if (!UTF) {
- ST.c2 = ST.c1 = *s;
- if (IS_TEXTF(text_node))
- ST.c2 = PL_fold[ST.c1];
- else if (IS_TEXTFL(text_node))
- ST.c2 = PL_fold_locale[ST.c1];
- }
- else { /* UTF */
- if (IS_TEXTF(text_node)) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- to_utf8_lower((U8*)s, tmpbuf1, &ulen1);
- to_utf8_upper((U8*)s, tmpbuf2, &ulen2);
-#ifdef EBCDIC
- ST.c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
- ST.c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
-#else
- ST.c1 = utf8n_to_uvuni(tmpbuf1, UTF8_MAXBYTES, 0,
- uniflags);
- ST.c2 = utf8n_to_uvuni(tmpbuf2, UTF8_MAXBYTES, 0,
- uniflags);
-#endif
- }
- else {
- ST.c2 = ST.c1 = utf8n_to_uvchr(s, UTF8_MAXBYTES, 0,
- uniflags);
- }
- }
- }
- }
- else
- ST.c1 = ST.c2 = CHRTEST_VOID;
- assume_ok_easy:
-
- ST.A = scan;
- ST.B = next;
- PL_reginput = locinput;
- if (minmod) {
- minmod = 0;
- if (ST.min && regrepeat(rex, ST.A, ST.min, depth) < ST.min)
- sayNO;
- ST.count = ST.min;
- locinput = PL_reginput;
- REGCP_SET(ST.cp);
- if (ST.c1 == CHRTEST_VOID)
- goto curly_try_B_min;
-
- ST.oldloc = locinput;
-
- /* set ST.maxpos to the furthest point along the
- * string that could possibly match */
- if (ST.max == REG_INFTY) {
- ST.maxpos = PL_regeol - 1;
- if (do_utf8)
- while (UTF8_IS_CONTINUATION(*(U8*)ST.maxpos))
- ST.maxpos--;
- }
- else if (do_utf8) {
- int m = ST.max - ST.min;
- for (ST.maxpos = locinput;
- m >0 && ST.maxpos + UTF8SKIP(ST.maxpos) <= PL_regeol; m--)
- ST.maxpos += UTF8SKIP(ST.maxpos);
- }
- else {
- ST.maxpos = locinput + ST.max - ST.min;
- if (ST.maxpos >= PL_regeol)
- ST.maxpos = PL_regeol - 1;
- }
- goto curly_try_B_min_known;
-
- }
- else {
- ST.count = regrepeat(rex, ST.A, ST.max, depth);
- locinput = PL_reginput;
- if (ST.count < ST.min)
- sayNO;
- if ((ST.count > ST.min)
- && (PL_regkind[OP(ST.B)] == EOL) && (OP(ST.B) != MEOL))
- {
- /* A{m,n} must come at the end of the string, there's
- * no point in backing off ... */
- ST.min = ST.count;
- /* ...except that $ and \Z can match before *and* after
- newline at the end. Consider "\n\n" =~ /\n+\Z\n/.
- We may back off by one in this case. */
- if (UCHARAT(PL_reginput - 1) == '\n' && OP(ST.B) != EOS)
- ST.min--;
- }
- REGCP_SET(ST.cp);
- goto curly_try_B_max;
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_known_fail:
- /* failed to find B in a non-greedy match where c1,c2 valid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- PL_reginput = locinput; /* Could be reset... */
- REGCP_UNWIND(ST.cp);
- /* Couldn't or didn't -- move forward. */
- ST.oldloc = locinput;
- if (do_utf8)
- locinput += UTF8SKIP(locinput);
- else
- locinput++;
- ST.count++;
- curly_try_B_min_known:
- /* find the next place where 'B' could work, then call B */
- {
- int n;
- if (do_utf8) {
- n = (ST.oldloc == locinput) ? 0 : 1;
- if (ST.c1 == ST.c2) {
- STRLEN len;
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos &&
- utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags) != (UV)ST.c1) {
- locinput += len;
- n++;
- }
- }
- else {
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos) {
- STRLEN len;
- const UV c = utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags);
- if (c == (UV)ST.c1 || c == (UV)ST.c2)
- break;
- locinput += len;
- n++;
- }
- }
- }
- else {
- if (ST.c1 == ST.c2) {
- while (locinput <= ST.maxpos &&
- UCHARAT(locinput) != ST.c1)
- locinput++;
- }
- else {
- while (locinput <= ST.maxpos
- && UCHARAT(locinput) != ST.c1
- && UCHARAT(locinput) != ST.c2)
- locinput++;
- }
- n = locinput - ST.oldloc;
- }
- if (locinput > ST.maxpos)
- sayNO;
- /* PL_reginput == oldloc now */
- if (n) {
- ST.count += n;
- if (regrepeat(rex, ST.A, n, depth) < n)
- sayNO;
- }
- PL_reginput = locinput;
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min_known, ST.B);
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_fail:
- /* failed to find B in a non-greedy match where c1,c2 invalid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* failed -- move forward one */
- PL_reginput = locinput;
- if (regrepeat(rex, ST.A, 1, depth)) {
- ST.count++;
- locinput = PL_reginput;
- if (ST.count <= ST.max || (ST.max == REG_INFTY &&
- ST.count > 0)) /* count overflow ? */
- {
- curly_try_B_min:
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min, ST.B);
- }
- }
- sayNO;
- /* NOTREACHED */
-
-
- curly_try_B_max:
- /* a successful greedy match: now try to match B */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- {
- UV c = 0;
- if (ST.c1 != CHRTEST_VOID)
- c = do_utf8 ? utf8n_to_uvchr((U8*)PL_reginput,
- UTF8_MAXBYTES, 0, uniflags)
- : (UV) UCHARAT(PL_reginput);
- /* If it could work, try it. */
- if (ST.c1 == CHRTEST_VOID || c == (UV)ST.c1 || c == (UV)ST.c2) {
- CURLY_SETPAREN(ST.paren, ST.count);
- PUSH_STATE_GOTO(CURLY_B_max, ST.B);
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case CURLY_B_max_fail:
- /* failed to find B in a greedy match */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* back up. */
- if (--ST.count < ST.min)
- sayNO;
- PL_reginput = locinput = HOPc(locinput, -1);
- goto curly_try_B_max;
-
-#undef ST
-
- case END:
- fake_end:
- if (cur_eval) {
- /* we've just finished A in /(??{A})B/; now continue with B */
- I32 tmpix;
- st->u.eval.toggle_reg_flags
- = cur_eval->u.eval.toggle_reg_flags;
- PL_reg_flags ^= st->u.eval.toggle_reg_flags;
-
- st->u.eval.prev_rex = rex_sv; /* inner */
- SETREX(rex_sv,cur_eval->u.eval.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- cur_curlyx = cur_eval->u.eval.prev_curlyx;
- ReREFCNT_inc(rex_sv);
- st->u.eval.cp = regcppush(0); /* Save *all* the positions. */
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- REGCP_SET(st->u.eval.lastcp);
- PL_reginput = locinput;
-
- /* Restore parens of the outer rex without popping the
- * savestack */
- tmpix = PL_savestack_ix;
- PL_savestack_ix = cur_eval->u.eval.lastcp;
- regcppop(rex);
- PL_savestack_ix = tmpix;
-
- st->u.eval.prev_eval = cur_eval;
- cur_eval = cur_eval->u.eval.prev_eval;
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log, "%*s EVAL trying tail ... %"UVxf"\n",
- REPORT_CODE_OFF+depth*2, "",PTR2UV(cur_eval)););
- if ( nochange_depth )
- nochange_depth--;
-
- PUSH_YES_STATE_GOTO(EVAL_AB,
- st->u.eval.prev_eval->u.eval.B); /* match B */
- }
-
- if (locinput < reginfo->till) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n",
- PL_colors[4],
- (long)(locinput - PL_reg_starttry),
- (long)(reginfo->till - PL_reg_starttry),
- PL_colors[5]));
-
- sayNO_SILENT; /* Cannot match: too short. */
- }
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
- case SUCCEED: /* successful SUSPEND/UNLESSM/IFMATCH/CURLYM */
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %ssubpattern success...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]));
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
-#undef ST
-#define ST st->u.ifmatch
-
- case SUSPEND: /* (?>A) */
- ST.wanted = 1;
- PL_reginput = locinput;
- goto do_ifmatch;
-
- case UNLESSM: /* -ve lookaround: (?!A), or with flags, (?<!A) */
- ST.wanted = 0;
- goto ifmatch_trivial_fail_test;
-
- case IFMATCH: /* +ve lookaround: (?=A), or with flags, (?<=A) */
- ST.wanted = 1;
- ifmatch_trivial_fail_test:
- if (scan->flags) {
- char * const s = HOPBACKc(locinput, scan->flags);
- if (!s) {
- /* trivial fail */
- if (logical) {
- logical = 0;
- sw = 1 - (bool)ST.wanted;
- }
- else if (ST.wanted)
- sayNO;
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- }
- PL_reginput = s;
- }
- else
- PL_reginput = locinput;
-
- do_ifmatch:
- ST.me = scan;
- ST.logical = logical;
- logical = 0; /* XXX: reset state of logical once it has been saved into ST */
-
- /* execute body of (?...A) */
- PUSH_YES_STATE_GOTO(IFMATCH_A, NEXTOPER(NEXTOPER(scan)));
- /* NOTREACHED */
-
- case IFMATCH_A_fail: /* body of (?...A) failed */
- ST.wanted = !ST.wanted;
- /* FALL THROUGH */
-
- case IFMATCH_A: /* body of (?...A) succeeded */
- if (ST.logical) {
- sw = (bool)ST.wanted;
- }
- else if (!ST.wanted)
- sayNO;
-
- if (OP(ST.me) == SUSPEND)
- locinput = PL_reginput;
- else {
- locinput = PL_reginput = st->locinput;
- nextchr = UCHARAT(locinput);
- }
- scan = ST.me + ARG(ST.me);
- if (scan == ST.me)
- scan = NULL;
- continue; /* execute B */
-
-#undef ST
-
- case LONGJMP:
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- case COMMIT:
- reginfo->cutpoint = PL_regeol;
- /* FALLTHROUGH */
- case PRUNE:
- PL_reginput = locinput;
- if (!scan->flags)
- sv_yes_mark = sv_commit = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(COMMIT_next,next);
- /* NOTREACHED */
- case COMMIT_next_fail:
- no_final = 1;
- /* FALLTHROUGH */
- case OPFAIL:
- sayNO;
- /* NOTREACHED */
-
-#define ST st->u.mark
- case MARKPOINT:
- ST.prev_mark = mark_state;
- ST.mark_name = sv_commit = sv_yes_mark
- = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- mark_state = st;
- ST.mark_loc = PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(MARKPOINT_next,next);
- /* NOTREACHED */
- case MARKPOINT_next:
- mark_state = ST.prev_mark;
- sayYES;
- /* NOTREACHED */
- case MARKPOINT_next_fail:
- if (popmark && sv_eq(ST.mark_name,popmark))
- {
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- popmark = NULL; /* we found our mark */
- sv_commit = ST.mark_name;
-
- DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,
- "%*s %ssetting cutpoint to mark:%"SVf"...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], SVfARG(sv_commit), PL_colors[5]);
- });
- }
- mark_state = ST.prev_mark;
- sv_yes_mark = mark_state ?
- mark_state->u.mark.mark_name : NULL;
- sayNO;
- /* NOTREACHED */
- case SKIP:
- PL_reginput = locinput;
- if (scan->flags) {
- /* (*SKIP) : if we fail we cut here*/
- ST.mark_name = NULL;
- ST.mark_loc = locinput;
- PUSH_STATE_GOTO(SKIP_next,next);
- } else {
- /* (*SKIP:NAME) : if there is a (*MARK:NAME) fail where it was,
- otherwise do nothing. Meaning we need to scan
- */
- regmatch_state *cur = mark_state;
- SV *find = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
-
- while (cur) {
- if ( sv_eq( cur->u.mark.mark_name,
- find ) )
- {
- ST.mark_name = find;
- PUSH_STATE_GOTO( SKIP_next, next );
- }
- cur = cur->u.mark.prev_mark;
- }
- }
- /* Didn't find our (*MARK:NAME) so ignore this (*SKIP:NAME) */
- break;
- case SKIP_next_fail:
- if (ST.mark_name) {
- /* (*CUT:NAME) - Set up to search for the name as we
- collapse the stack*/
- popmark = ST.mark_name;
- } else {
- /* (*CUT) - No name, we cut here.*/
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- /* but we set sv_commit to latest mark_name if there
- is one so they can test to see how things lead to this
- cut */
- if (mark_state)
- sv_commit=mark_state->u.mark.mark_name;
- }
- no_final = 1;
- sayNO;
- /* NOTREACHED */
-#undef ST
- case FOLDCHAR:
- n = ARG(scan);
- if ( n == (U32)what_len_TRICKYFOLD(locinput,do_utf8,ln) ) {
- locinput += ln;
- } else if ( 0xDF == n && !do_utf8 && !UTF ) {
- sayNO;
- } else {
- U8 folded[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const char * const l = locinput;
- char *e = PL_regeol;
- to_uni_fold(n, folded, &foldlen);
-
- if (ibcmp_utf8((const char*) folded, 0, foldlen, 1,
- l, &e, 0, do_utf8)) {
- sayNO;
- }
- locinput = e;
- }
- nextchr = UCHARAT(locinput);
- break;
- case LNBREAK:
- if ((n=is_LNBREAK(locinput,do_utf8))) {
- locinput += n;
- nextchr = UCHARAT(locinput);
- } else
- sayNO;
- break;
-
-#define CASE_CLASS(nAmE) \
- case nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- locinput += n; \
- nextchr = UCHARAT(locinput); \
- } else \
- sayNO; \
- break; \
- case N##nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- sayNO; \
- } else { \
- locinput += UTF8SKIP(locinput); \
- nextchr = UCHARAT(locinput); \
- } \
- break
-
- CASE_CLASS(VERTWS);
- CASE_CLASS(HORIZWS);
-#undef CASE_CLASS
-
- default:
- PerlIO_printf(Perl_error_log, "%"UVxf" %d\n",
- PTR2UV(scan), OP(scan));
- Perl_croak(aTHX_ "regexp memory corruption");
-
- } /* end switch */
-
- /* switch break jumps here */
- scan = next; /* prepare to execute the next op and ... */
- continue; /* ... jump back to the top, reusing st */
- /* NOTREACHED */
-
- push_yes_state:
- /* push a state that backtracks on success */
- st->u.yes.prev_yes_state = yes_state;
- yes_state = st;
- /* FALL THROUGH */
- push_state:
- /* push a new regex state, then continue at scan */
- {
- regmatch_state *newst;
-
- DEBUG_STACK_r({
- regmatch_state *cur = st;
- regmatch_state *curyes = yes_state;
- int curd = depth;
- regmatch_slab *slab = PL_regmatch_slab;
- for (;curd > -1;cur--,curd--) {
- if (cur < SLAB_FIRST(slab)) {
- slab = slab->prev;
- cur = SLAB_LAST(slab);
- }
- PerlIO_printf(Perl_error_log, "%*s#%-3d %-10s %s\n",
- REPORT_CODE_OFF + 2 + depth * 2,"",
- curd, PL_reg_name[cur->resume_state],
- (curyes == cur) ? "yes" : ""
- );
- if (curyes == cur)
- curyes = cur->u.yes.prev_yes_state;
- }
- } else
- DEBUG_STATE_pp("push")
- );
- depth++;
- st->locinput = locinput;
- newst = st+1;
- if (newst > SLAB_LAST(PL_regmatch_slab))
- newst = S_push_slab(aTHX);
- PL_regmatch_state = newst;
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- st = newst;
- continue;
- /* NOTREACHED */
- }
- }
-
- /*
- * We get here only if there's trouble -- normally "case END" is
- * the terminating point.
- */
- Perl_croak(aTHX_ "corrupted regexp pointers");
- /*NOTREACHED*/
- sayNO;
-
-yes:
- if (yes_state) {
- /* we have successfully completed a subexpression, but we must now
- * pop to the state marked by yes_state and continue from there */
- assert(st != yes_state);
-#ifdef DEBUGGING
- while (st != yes_state) {
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- DEBUG_STATE_r({
- if (no_final) {
- DEBUG_STATE_pp("pop (no final)");
- } else {
- DEBUG_STATE_pp("pop (yes)");
- }
- });
- depth--;
- }
-#else
- while (yes_state < SLAB_FIRST(PL_regmatch_slab)
- || yes_state > SLAB_LAST(PL_regmatch_slab))
- {
- /* not in this slab, pop slab */
- depth -= (st - SLAB_FIRST(PL_regmatch_slab) + 1);
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- depth -= (st - yes_state);
-#endif
- st = yes_state;
- yes_state = st->u.yes.prev_yes_state;
- PL_regmatch_state = st;
-
- if (no_final) {
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
- }
- state_num = st->resume_state + no_final;
- goto reenter_switch;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n",
- PL_colors[4], PL_colors[5]));
-
- if (PL_reg_eval_set) {
- /* each successfully executed (?{...}) block does the equivalent of
- * local $^R = do {...}
- * When popping the save stack, all these locals would be undone;
- * bypass this by setting the outermost saved $^R to the latest
- * value */
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- }
- result = 1;
- goto final_exit;
-
-no:
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], PL_colors[5])
- );
-
-no_silent:
- if (no_final) {
- if (yes_state) {
- goto yes;
- } else {
- goto final_exit;
- }
- }
- if (depth) {
- /* there's a previous state to backtrack to */
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- PL_regmatch_state = st;
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
-
- DEBUG_STATE_pp("pop");
- depth--;
- if (yes_state == st)
- yes_state = st->u.yes.prev_yes_state;
-
- state_num = st->resume_state + 1; /* failure = success + 1 */
- goto reenter_switch;
- }
- result = 0;
-
- final_exit:
- if (rex->intflags & PREGf_VERBARG_SEEN) {
- SV *sv_err = get_sv("REGERROR", 1);
- SV *sv_mrk = get_sv("REGMARK", 1);
- if (result) {
- sv_commit = &PL_sv_no;
- if (!sv_yes_mark)
- sv_yes_mark = &PL_sv_yes;
- } else {
- if (!sv_commit)
- sv_commit = &PL_sv_yes;
- sv_yes_mark = &PL_sv_no;
- }
- sv_setsv(sv_err, sv_commit);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- /* clean up; in particular, free all slabs above current one */
- LEAVE_SCOPE(oldsave);
-
- return result;
-}
-
-/*
- - regrepeat - repeatedly match something simple, report how many
- */
-/*
- * [This routine now assumes that it will only match on things of length 1.
- * That was true before, but now we assume scan - reginput is the count,
- * rather than incrementing count on every character. [Er, except utf8.]]
- */
-STATIC I32
-S_regrepeat(pTHX_ const regexp *prog, const regnode *p, I32 max, int depth)
-{
- dVAR;
- register char *scan;
- register I32 c;
- register char *loceol = PL_regeol;
- register I32 hardcount = 0;
- register bool do_utf8 = PL_reg_match_utf8;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_REGREPEAT;
-
- scan = PL_reginput;
- if (max == REG_INFTY)
- max = I32_MAX;
- else if (max < loceol - scan)
- loceol = scan + max;
- switch (OP(p)) {
- case REG_ANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max && *scan != '\n') {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && *scan != '\n')
- scan++;
- }
- break;
- case SANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- }
- else
- scan = loceol;
- break;
- case CANY:
- scan = loceol;
- break;
- case EXACT: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol && UCHARAT(scan) == c)
- scan++;
- break;
- case EXACTF: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c]))
- scan++;
- break;
- case EXACTFL: /* length of string is 1 */
- PL_reg_flags |= RF_tainted;
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c]))
- scan++;
- break;
- case ANYOF:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- reginclass(prog, p, (U8*)scan, 0, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && REGINCLASS(prog, p, (U8*)scan))
- scan++;
- }
- break;
- case ALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM(*scan))
- scan++;
- }
- break;
- case ALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM_LC(*scan))
- scan++;
- }
- break;
- case NALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM(*scan))
- scan++;
- }
- break;
- case NALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM_LC(*scan))
- scan++;
- }
- break;
- case SPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE(*scan))
- scan++;
- }
- break;
- case SPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE_LC(*scan))
- scan++;
- }
- break;
- case NSPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE(*scan))
- scan++;
- }
- break;
- case NSPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE_LC(*scan))
- scan++;
- }
- break;
- case DIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isDIGIT(*scan))
- scan++;
- }
- break;
- case NDIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isDIGIT(*scan))
- scan++;
- }
- case LNBREAK:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_LNBREAK_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- /*
- LNBREAK can match two latin chars, which is ok,
- because we have a null terminated string, but we
- have to use hardcount in this situation
- */
- while (scan < loceol && (c=is_LNBREAK_latin1(scan))) {
- scan+=c;
- hardcount++;
- }
- }
- break;
- case HORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_HORIZWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_HORIZWS_latin1(scan))
- scan++;
- }
- break;
- case NHORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_HORIZWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_HORIZWS_latin1(scan))
- scan++;
-
- }
- break;
- case VERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_VERTWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
- case NVERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_VERTWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
-
- default: /* Called on something of 0 width. */
- break; /* So match right here or not at all. */
- }
-
- if (hardcount)
- c = hardcount;
- else
- c = scan - PL_reginput;
- PL_reginput = scan;
-
- DEBUG_r({
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, p);
- PerlIO_printf(Perl_debug_log,
- "%*s %s can match %"IVdf" times out of %"IVdf"...\n",
- REPORT_CODE_OFF + depth*2, "", SvPVX_const(prop),(IV)c,(IV)max);
- });
- });
-
- return(c);
-}
-
-
-#if !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION)
-/*
-- regclass_swash - prepare the utf8 swash
-*/
-
-SV *
-Perl_regclass_swash(pTHX_ const regexp *prog, register const regnode* node, bool doinit, SV** listsvp, SV **altsvp)
-{
- dVAR;
- SV *sw = NULL;
- SV *si = NULL;
- SV *alt = NULL;
- RXi_GET_DECL(prog,progi);
- const struct reg_data * const data = prog ? progi->data : NULL;
-
- PERL_ARGS_ASSERT_REGCLASS_SWASH;
-
- if (data && data->count) {
- const U32 n = ARG(node);
-
- if (data->what[n] == 's') {
- SV * const rv = MUTABLE_SV(data->data[n]);
- AV * const av = MUTABLE_AV(SvRV(rv));
- SV **const ary = AvARRAY(av);
- SV **a, **b;
-
- /* See the end of regcomp.c:S_regclass() for
- * documentation of these array elements. */
-
- si = *ary;
- a = SvROK(ary[1]) ? &ary[1] : NULL;
- b = SvTYPE(ary[2]) == SVt_PVAV ? &ary[2] : NULL;
-
- if (a)
- sw = *a;
- else if (si && doinit) {
- sw = swash_init("utf8", "", si, 1, 0);
- (void)av_store(av, 1, sw);
- }
- if (b)
- alt = *b;
- }
- }
-
- if (listsvp)
- *listsvp = si;
- if (altsvp)
- *altsvp = alt;
-
- return sw;
-}
-#endif
-
-/*
- - reginclass - determine if a character falls into a character class
-
- The n is the ANYOF regnode, the p is the target string, lenp
- is pointer to the maximum length of how far to go in the p
- (if the lenp is zero, UTF8SKIP(p) is used),
- do_utf8 tells whether the target string is in UTF-8.
-
- */
-
-STATIC bool
-S_reginclass(pTHX_ const regexp *prog, register const regnode *n, register const U8* p, STRLEN* lenp, register bool do_utf8)
-{
- dVAR;
- const char flags = ANYOF_FLAGS(n);
- bool match = FALSE;
- UV c = *p;
- STRLEN len = 0;
- STRLEN plen;
-
- PERL_ARGS_ASSERT_REGINCLASS;
-
- if (do_utf8 && !UTF8_IS_INVARIANT(c)) {
- c = utf8n_to_uvchr(p, UTF8_MAXBYTES, &len,
- (UTF8_ALLOW_DEFAULT & UTF8_ALLOW_ANYUV) | UTF8_CHECK_ONLY);
- /* see [perl #37836] for UTF8_ALLOW_ANYUV */
- if (len == (STRLEN)-1)
- Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)");
- }
-
- plen = lenp ? *lenp : UNISKIP(NATIVE_TO_UNI(c));
- if (do_utf8 || (flags & ANYOF_UNICODE)) {
- if (lenp)
- *lenp = 0;
- if (do_utf8 && !ANYOF_RUNTIME(n)) {
- if (len != (STRLEN)-1 && c < 256 && ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- }
- if (!match && do_utf8 && (flags & ANYOF_UNICODE_ALL) && c >= 256)
- match = TRUE;
- if (!match) {
- AV *av;
- SV * const sw = regclass_swash(prog, n, TRUE, 0, (SV**)&av);
-
- if (sw) {
- U8 * utf8_p;
- if (do_utf8) {
- utf8_p = (U8 *) p;
- } else {
- STRLEN len = 1;
- utf8_p = bytes_to_utf8(p, &len);
- }
- if (swash_fetch(sw, utf8_p, 1))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- if (!match && lenp && av) {
- I32 i;
- for (i = 0; i <= av_len(av); i++) {
- SV* const sv = *av_fetch(av, i, FALSE);
- STRLEN len;
- const char * const s = SvPV_const(sv, len);
- if (len <= plen && memEQ(s, (char*)utf8_p, len)) {
- *lenp = len;
- match = TRUE;
- break;
- }
- }
- }
- if (!match) {
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1];
-
- STRLEN tmplen;
- to_utf8_fold(utf8_p, tmpbuf, &tmplen);
- if (swash_fetch(sw, tmpbuf, 1))
- match = TRUE;
- }
- }
-
- /* If we allocated a string above, free it */
- if (! do_utf8) Safefree(utf8_p);
- }
- }
- if (match && lenp && *lenp == 0)
- *lenp = UNISKIP(NATIVE_TO_UNI(c));
- }
- if (!match && c < 256) {
- if (ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- U8 f;
-
- if (flags & ANYOF_LOCALE) {
- PL_reg_flags |= RF_tainted;
- f = PL_fold_locale[c];
- }
- else
- f = PL_fold[c];
- if (f != c && ANYOF_BITMAP_TEST(n, f))
- match = TRUE;
- }
-
- if (!match && (flags & ANYOF_CLASS)) {
- PL_reg_flags |= RF_tainted;
- if (
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK(c))
- ) /* How's that for a conditional? */
- {
- match = TRUE;
- }
- }
- }
-
- return (flags & ANYOF_INVERT) ? !match : match;
-}
-
-STATIC U8 *
-S_reghop3(U8 *s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-
-#ifdef XXX_dmq
-/* there are a bunch of places where we use two reghop3's that should
- be replaced with this routine. but since thats not done yet
- we ifdef it out - dmq
-*/
-STATIC U8 *
-S_reghop4(U8 *s, I32 off, const U8* llim, const U8* rlim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP4;
-
- if (off >= 0) {
- while (off-- && s < rlim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > llim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > llim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-#endif
-
-STATIC U8 *
-S_reghopmaybe3(U8* s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOPMAYBE3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- if (off >= 0)
- return NULL;
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- if (off <= 0)
- return NULL;
- }
- return s;
-}
-
-static void
-restore_pos(pTHX_ void *arg)
-{
- dVAR;
- regexp * const rex = (regexp *)arg;
- if (PL_reg_eval_set) {
- if (PL_reg_oldsaved) {
- rex->subbeg = PL_reg_oldsaved;
- rex->sublen = PL_reg_oldsavedlen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- rex->saved_copy = PL_nrs;
-#endif
- RXp_MATCH_COPIED_on(rex);
- }
- PL_reg_magic->mg_len = PL_reg_oldpos;
- PL_reg_eval_set = 0;
- PL_curpm = PL_reg_oldcurpm;
- }
-}
-
-STATIC void
-S_to_utf8_substr(pTHX_ register regexp *prog)
-{
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_UTF8_SUBSTR;
-
- do {
- if (prog->substrs->data[i].substr
- && !prog->substrs->data[i].utf8_substr) {
- SV* const sv = newSVsv(prog->substrs->data[i].substr);
- prog->substrs->data[i].utf8_substr = sv;
- sv_utf8_upgrade(sv);
- if (SvVALID(prog->substrs->data[i].substr)) {
- const U8 flags = BmFLAGS(prog->substrs->data[i].substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- /* Whilst this makes the SV technically "invalid" (as its
- buffer is no longer followed by "\0") when fbm_compile()
- adds the "\n" back, a "\0" is restored. */
- }
- fbm_compile(sv, flags);
- }
- if (prog->substrs->data[i].substr == prog->check_substr)
- prog->check_utf8 = sv;
- }
- } while (i--);
-}
-
-STATIC void
-S_to_byte_substr(pTHX_ register regexp *prog)
-{
- dVAR;
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_BYTE_SUBSTR;
-
- do {
- if (prog->substrs->data[i].utf8_substr
- && !prog->substrs->data[i].substr) {
- SV* sv = newSVsv(prog->substrs->data[i].utf8_substr);
- if (sv_utf8_downgrade(sv, TRUE)) {
- if (SvVALID(prog->substrs->data[i].utf8_substr)) {
- const U8 flags
- = BmFLAGS(prog->substrs->data[i].utf8_substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- }
- fbm_compile(sv, flags);
- }
- } else {
- SvREFCNT_dec(sv);
- sv = &PL_sv_undef;
- }
- prog->substrs->data[i].substr = sv;
- if (prog->substrs->data[i].utf8_substr == prog->check_utf8)
- prog->check_substr = sv;
- }
- } while (i--);
-}
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regcomp.c
- */
-
-/*
- * 'A fair jaw-cracker dwarf-language must be.' --Samwise Gamgee
- *
- * [p.285 of _The Lord of the Rings_, II/iii: "The Ring Goes South"]
- */
-
-/* This file contains functions for compiling a regular expression. See
- * also regexec.c which funnily enough, contains functions for executing
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_comp.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
-
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGCOMP_C
-#include "perl.h"
-
-#ifndef PERL_IN_XSUB_RE
-# include "INTERN.h"
-#endif
-
-#define REG_COMP_C
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#ifdef op
-#undef op
-#endif /* op */
-
-#ifdef MSDOS
-# if defined(BUGGY_MSC6)
- /* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */
-# pragma optimize("a",off)
- /* But MSC 6.00A is happy with 'w', for aliases only across function calls*/
-# pragma optimize("w",on )
-# endif /* BUGGY_MSC6 */
-#endif /* MSDOS */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-typedef struct RExC_state_t {
- U32 flags; /* are we folding, multilining? */
- char *precomp; /* uncompiled string. */
- REGEXP *rx_sv; /* The SV that is the regexp. */
- regexp *rx; /* perl core regexp structure */
- regexp_internal *rxi; /* internal data for regexp object pprivate field */
- char *start; /* Start of input for compile */
- char *end; /* End of input for compile */
- char *parse; /* Input-scan pointer. */
- I32 whilem_seen; /* number of WHILEM in this expr */
- regnode *emit_start; /* Start of emitted-code area */
- regnode *emit_bound; /* First regnode outside of the allocated space */
- regnode *emit; /* Code-emit pointer; ®dummy = don't = compiling */
- I32 naughty; /* How bad is this pattern? */
- I32 sawback; /* Did we see \1, ...? */
- U32 seen;
- I32 size; /* Code size. */
- I32 npar; /* Capture buffer count, (OPEN). */
- I32 cpar; /* Capture buffer count, (CLOSE). */
- I32 nestroot; /* root parens we are in - used by accept */
- I32 extralen;
- I32 seen_zerolen;
- I32 seen_evals;
- regnode **open_parens; /* pointers to open parens */
- regnode **close_parens; /* pointers to close parens */
- regnode *opend; /* END node in program */
- I32 utf8; /* whether the pattern is utf8 or not */
- I32 orig_utf8; /* whether the pattern was originally in utf8 */
- /* XXX use this for future optimisation of case
- * where pattern must be upgraded to utf8. */
- HV *charnames; /* cache of named sequences */
- HV *paren_names; /* Paren names */
-
- regnode **recurse; /* Recurse regops */
- I32 recurse_count; /* Number of recurse regops */
-#if ADD_TO_REGEXEC
- char *starttry; /* -Dr: where regtry was called. */
-#define RExC_starttry (pRExC_state->starttry)
-#endif
-#ifdef DEBUGGING
- const char *lastparse;
- I32 lastnum;
- AV *paren_name_list; /* idx -> name */
-#define RExC_lastparse (pRExC_state->lastparse)
-#define RExC_lastnum (pRExC_state->lastnum)
-#define RExC_paren_name_list (pRExC_state->paren_name_list)
-#endif
-} RExC_state_t;
-
-#define RExC_flags (pRExC_state->flags)
-#define RExC_precomp (pRExC_state->precomp)
-#define RExC_rx_sv (pRExC_state->rx_sv)
-#define RExC_rx (pRExC_state->rx)
-#define RExC_rxi (pRExC_state->rxi)
-#define RExC_start (pRExC_state->start)
-#define RExC_end (pRExC_state->end)
-#define RExC_parse (pRExC_state->parse)
-#define RExC_whilem_seen (pRExC_state->whilem_seen)
-#ifdef RE_TRACK_PATTERN_OFFSETS
-#define RExC_offsets (pRExC_state->rxi->u.offsets) /* I am not like the others */
-#endif
-#define RExC_emit (pRExC_state->emit)
-#define RExC_emit_start (pRExC_state->emit_start)
-#define RExC_emit_bound (pRExC_state->emit_bound)
-#define RExC_naughty (pRExC_state->naughty)
-#define RExC_sawback (pRExC_state->sawback)
-#define RExC_seen (pRExC_state->seen)
-#define RExC_size (pRExC_state->size)
-#define RExC_npar (pRExC_state->npar)
-#define RExC_nestroot (pRExC_state->nestroot)
-#define RExC_extralen (pRExC_state->extralen)
-#define RExC_seen_zerolen (pRExC_state->seen_zerolen)
-#define RExC_seen_evals (pRExC_state->seen_evals)
-#define RExC_utf8 (pRExC_state->utf8)
-#define RExC_orig_utf8 (pRExC_state->orig_utf8)
-#define RExC_charnames (pRExC_state->charnames)
-#define RExC_open_parens (pRExC_state->open_parens)
-#define RExC_close_parens (pRExC_state->close_parens)
-#define RExC_opend (pRExC_state->opend)
-#define RExC_paren_names (pRExC_state->paren_names)
-#define RExC_recurse (pRExC_state->recurse)
-#define RExC_recurse_count (pRExC_state->recurse_count)
-
-
-#define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?')
-#define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \
- ((*s) == '{' && regcurly(s)))
-
-#ifdef SPSTART
-#undef SPSTART /* dratted cpp namespace... */
-#endif
-/*
- * Flags to be passed up and down.
- */
-#define WORST 0 /* Worst case. */
-#define HASWIDTH 0x01 /* Known to match non-null strings. */
-#define SIMPLE 0x02 /* Simple enough to be STAR/PLUS operand. */
-#define SPSTART 0x04 /* Starts with * or +. */
-#define TRYAGAIN 0x08 /* Weeded out a declaration. */
-#define POSTPONED 0x10 /* (?1),(?&name), (??{...}) or similar */
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-RExC_emit_start) : -1)
-
-/* whether trie related optimizations are enabled */
-#if PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION
-#define TRIE_STUDY_OPT
-#define FULL_TRIE_STUDY
-#define TRIE_STCLASS
-#endif
-
-
-
-#define PBYTE(u8str,paren) ((U8*)(u8str))[(paren) >> 3]
-#define PBITVAL(paren) (1 << ((paren) & 7))
-#define PAREN_TEST(u8str,paren) ( PBYTE(u8str,paren) & PBITVAL(paren))
-#define PAREN_SET(u8str,paren) PBYTE(u8str,paren) |= PBITVAL(paren)
-#define PAREN_UNSET(u8str,paren) PBYTE(u8str,paren) &= (~PBITVAL(paren))
-
-
-/* About scan_data_t.
-
- During optimisation we recurse through the regexp program performing
- various inplace (keyhole style) optimisations. In addition study_chunk
- and scan_commit populate this data structure with information about
- what strings MUST appear in the pattern. We look for the longest
- string that must appear for at a fixed location, and we look for the
- longest string that may appear at a floating location. So for instance
- in the pattern:
-
- /FOO[xX]A.*B[xX]BAR/
-
- Both 'FOO' and 'A' are fixed strings. Both 'B' and 'BAR' are floating
- strings (because they follow a .* construct). study_chunk will identify
- both FOO and BAR as being the longest fixed and floating strings respectively.
-
- The strings can be composites, for instance
-
- /(f)(o)(o)/
-
- will result in a composite fixed substring 'foo'.
-
- For each string some basic information is maintained:
-
- - offset or min_offset
- This is the position the string must appear at, or not before.
- It also implicitly (when combined with minlenp) tells us how many
- character must match before the string we are searching.
- Likewise when combined with minlenp and the length of the string
- tells us how many characters must appear after the string we have
- found.
-
- - max_offset
- Only used for floating strings. This is the rightmost point that
- the string can appear at. Ifset to I32 max it indicates that the
- string can occur infinitely far to the right.
-
- - minlenp
- A pointer to the minimum length of the pattern that the string
- was found inside. This is important as in the case of positive
- lookahead or positive lookbehind we can have multiple patterns
- involved. Consider
-
- /(?=FOO).*F/
-
- The minimum length of the pattern overall is 3, the minimum length
- of the lookahead part is 3, but the minimum length of the part that
- will actually match is 1. So 'FOO's minimum length is 3, but the
- minimum length for the F is 1. This is important as the minimum length
- is used to determine offsets in front of and behind the string being
- looked for. Since strings can be composites this is the length of the
- pattern at the time it was commited with a scan_commit. Note that
- the length is calculated by study_chunk, so that the minimum lengths
- are not known until the full pattern has been compiled, thus the
- pointer to the value.
-
- - lookbehind
-
- In the case of lookbehind the string being searched for can be
- offset past the start point of the final matching string.
- If this value was just blithely removed from the min_offset it would
- invalidate some of the calculations for how many chars must match
- before or after (as they are derived from min_offset and minlen and
- the length of the string being searched for).
- When the final pattern is compiled and the data is moved from the
- scan_data_t structure into the regexp structure the information
- about lookbehind is factored in, with the information that would
- have been lost precalculated in the end_shift field for the
- associated string.
-
- The fields pos_min and pos_delta are used to store the minimum offset
- and the delta to the maximum offset at the current point in the pattern.
-
-*/
-
-typedef struct scan_data_t {
- /*I32 len_min; unused */
- /*I32 len_delta; unused */
- I32 pos_min;
- I32 pos_delta;
- SV *last_found;
- I32 last_end; /* min value, <0 unless valid. */
- I32 last_start_min;
- I32 last_start_max;
- SV **longest; /* Either &l_fixed, or &l_float. */
- SV *longest_fixed; /* longest fixed string found in pattern */
- I32 offset_fixed; /* offset where it starts */
- I32 *minlen_fixed; /* pointer to the minlen relevent to the string */
- I32 lookbehind_fixed; /* is the position of the string modfied by LB */
- SV *longest_float; /* longest floating string found in pattern */
- I32 offset_float_min; /* earliest point in string it can appear */
- I32 offset_float_max; /* latest point in string it can appear */
- I32 *minlen_float; /* pointer to the minlen relevent to the string */
- I32 lookbehind_float; /* is the position of the string modified by LB */
- I32 flags;
- I32 whilem_c;
- I32 *last_closep;
- struct regnode_charclass_class *start_class;
-} scan_data_t;
-
-/*
- * Forward declarations for pregcomp()'s friends.
- */
-
-static const scan_data_t zero_scan_data =
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0};
-
-#define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL)
-#define SF_BEFORE_SEOL 0x0001
-#define SF_BEFORE_MEOL 0x0002
-#define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL)
-#define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL)
-
-#ifdef NO_UNARY_PLUS
-# define SF_FIX_SHIFT_EOL (0+2)
-# define SF_FL_SHIFT_EOL (0+4)
-#else
-# define SF_FIX_SHIFT_EOL (+2)
-# define SF_FL_SHIFT_EOL (+4)
-#endif
-
-#define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL)
-#define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL)
-
-#define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL)
-#define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */
-#define SF_IS_INF 0x0040
-#define SF_HAS_PAR 0x0080
-#define SF_IN_PAR 0x0100
-#define SF_HAS_EVAL 0x0200
-#define SCF_DO_SUBSTR 0x0400
-#define SCF_DO_STCLASS_AND 0x0800
-#define SCF_DO_STCLASS_OR 0x1000
-#define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR)
-#define SCF_WHILEM_VISITED_POS 0x2000
-
-#define SCF_TRIE_RESTUDY 0x4000 /* Do restudy? */
-#define SCF_SEEN_ACCEPT 0x8000
-
-#define UTF (RExC_utf8 != 0)
-#define LOC ((RExC_flags & RXf_PMf_LOCALE) != 0)
-#define FOLD ((RExC_flags & RXf_PMf_FOLD) != 0)
-
-#define OOB_UNICODE 12345678
-#define OOB_NAMEDCLASS -1
-
-#define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b)
-
-
-/* length of regex to show in messages that don't mark a position within */
-#define RegexLengthToShowInErrorMessages 127
-
-/*
- * If MARKER[12] are adjusted, be sure to adjust the constants at the top
- * of t/op/regmesg.t, the tests in t/op/re_tests, and those in
- * op/pragma/warn/regcomp.
- */
-#define MARKER1 "<-- HERE" /* marker as it appears in the description */
-#define MARKER2 " <-- HERE " /* marker as it appears within the regex */
-
-#define REPORT_LOCATION " in regex; marked by " MARKER1 " in m/%.*s" MARKER2 "%s/"
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given
- * arg. Show regex, up to a maximum length. If it's too long, chop and add
- * "...".
- */
-#define _FAIL(code) STMT_START { \
- const char *ellipses = ""; \
- IV len = RExC_end - RExC_precomp; \
- \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- if (len > RegexLengthToShowInErrorMessages) { \
- /* chop 10 shorter than the max, to ensure meaning of "..." */ \
- len = RegexLengthToShowInErrorMessages - 10; \
- ellipses = "..."; \
- } \
- code; \
-} STMT_END
-
-#define FAIL(msg) _FAIL( \
- Perl_croak(aTHX_ "%s in regex m/%.*s%s/", \
- msg, (int)len, RExC_precomp, ellipses))
-
-#define FAIL2(msg,arg) _FAIL( \
- Perl_croak(aTHX_ msg " in regex m/%.*s%s/", \
- arg, (int)len, RExC_precomp, ellipses))
-
-/*
- * Simple_vFAIL -- like FAIL, but marks the current location in the scan
- */
-#define Simple_vFAIL(m) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- Perl_croak(aTHX_ "%s" REPORT_LOCATION, \
- m, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL()
- */
-#define vFAIL(m) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL(m); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts two arguments.
- */
-#define Simple_vFAIL2(m,a1) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2().
- */
-#define vFAIL2(m,a1) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL2(m, a1); \
-} STMT_END
-
-
-/*
- * Like Simple_vFAIL(), but accepts three arguments.
- */
-#define Simple_vFAIL3(m, a1, a2) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3().
- */
-#define vFAIL3(m,a1,a2) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL3(m, a1, a2); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts four arguments.
- */
-#define Simple_vFAIL4(m, a1, a2, a3) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNreg(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNregdep(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_REGEXP), \
- m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN2reg(loc, m, a1) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN3(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN3reg(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN4(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN4reg(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN5(loc, m, a1, a2, a3, a4) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, a4, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-
-/* Allow for side effects in s */
-#define REGC(c,s) STMT_START { \
- if (!SIZE_ONLY) *(s) = (c); else (void)(s); \
-} STMT_END
-
-/* Macros for recording node offsets. 20001227 mjd@plover.com
- * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in
- * element 2*n-1 of the array. Element #2n holds the byte length node #n.
- * Element 0 holds the number n.
- * Position is 1 indexed.
- */
-#ifndef RE_TRACK_PATTERN_OFFSETS
-#define Set_Node_Offset_To_R(node,byte)
-#define Set_Node_Offset(node,byte)
-#define Set_Cur_Node_Offset
-#define Set_Node_Length_To_R(node,len)
-#define Set_Node_Length(node,len)
-#define Set_Node_Cur_Length(node)
-#define Node_Offset(n)
-#define Node_Length(n)
-#define Set_Node_Offset_Length(node,offset,len)
-#define ProgLen(ri) ri->u.proglen
-#define SetProgLen(ri,x) ri->u.proglen = x
-#else
-#define ProgLen(ri) ri->u.offsets[0]
-#define SetProgLen(ri,x) ri->u.offsets[0] = x
-#define Set_Node_Offset_To_R(node,byte) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) offset of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(byte))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Offset macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)-1] = (byte); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Offset(node,byte) \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start)
-#define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse)
-
-#define Set_Node_Length_To_R(node,len) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) size of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(len))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Length macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)] = (len); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Length(node,len) \
- Set_Node_Length_To_R((node)-RExC_emit_start, len)
-#define Set_Cur_Node_Length(len) Set_Node_Length(RExC_emit, len)
-#define Set_Node_Cur_Length(node) \
- Set_Node_Length(node, RExC_parse - parse_start)
-
-/* Get offsets and lengths */
-#define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1])
-#define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)])
-
-#define Set_Node_Offset_Length(node,offset,len) STMT_START { \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (offset)); \
- Set_Node_Length_To_R((node)-RExC_emit_start, (len)); \
-} STMT_END
-#endif
-
-#if PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS
-#define EXPERIMENTAL_INPLACESCAN
-#endif /*RE_TRACK_PATTERN_OFFSETS*/
-
-#define DEBUG_STUDYDATA(str,data,depth) \
-DEBUG_OPTIMISE_MORE_r(if(data){ \
- PerlIO_printf(Perl_debug_log, \
- "%*s" str "Pos:%"IVdf"/%"IVdf \
- " Flags: 0x%"UVXf" Whilem_c: %"IVdf" Lcp: %"IVdf" %s", \
- (int)(depth)*2, "", \
- (IV)((data)->pos_min), \
- (IV)((data)->pos_delta), \
- (UV)((data)->flags), \
- (IV)((data)->whilem_c), \
- (IV)((data)->last_closep ? *((data)->last_closep) : -1), \
- is_inf ? "INF " : "" \
- ); \
- if ((data)->last_found) \
- PerlIO_printf(Perl_debug_log, \
- "Last:'%s' %"IVdf":%"IVdf"/%"IVdf" %sFixed:'%s' @ %"IVdf \
- " %sFloat: '%s' @ %"IVdf"/%"IVdf"", \
- SvPVX_const((data)->last_found), \
- (IV)((data)->last_end), \
- (IV)((data)->last_start_min), \
- (IV)((data)->last_start_max), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_fixed)) ? "*" : "", \
- SvPVX_const((data)->longest_fixed), \
- (IV)((data)->offset_fixed), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_float)) ? "*" : "", \
- SvPVX_const((data)->longest_float), \
- (IV)((data)->offset_float_min), \
- (IV)((data)->offset_float_max) \
- ); \
- PerlIO_printf(Perl_debug_log,"\n"); \
-});
-
-static void clear_re(pTHX_ void *r);
-
-/* Mark that we cannot extend a found fixed substring at this point.
- Update the longest found anchored substring and the longest found
- floating substrings if needed. */
-
-STATIC void
-S_scan_commit(pTHX_ const RExC_state_t *pRExC_state, scan_data_t *data, I32 *minlenp, int is_inf)
-{
- const STRLEN l = CHR_SVLEN(data->last_found);
- const STRLEN old_l = CHR_SVLEN(*data->longest);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_SCAN_COMMIT;
-
- if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) {
- SvSetMagicSV(*data->longest, data->last_found);
- if (*data->longest == data->longest_fixed) {
- data->offset_fixed = l ? data->last_start_min : data->pos_min;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL);
- else
- data->flags &= ~SF_FIX_BEFORE_EOL;
- data->minlen_fixed=minlenp;
- data->lookbehind_fixed=0;
- }
- else { /* *data->longest == data->longest_float */
- data->offset_float_min = l ? data->last_start_min : data->pos_min;
- data->offset_float_max = (l
- ? data->last_start_max
- : data->pos_min + data->pos_delta);
- if (is_inf || (U32)data->offset_float_max > (U32)I32_MAX)
- data->offset_float_max = I32_MAX;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL);
- else
- data->flags &= ~SF_FL_BEFORE_EOL;
- data->minlen_float=minlenp;
- data->lookbehind_float=0;
- }
- }
- SvCUR_set(data->last_found, 0);
- {
- SV * const sv = data->last_found;
- if (SvUTF8(sv) && SvMAGICAL(sv)) {
- MAGIC * const mg = mg_find(sv, PERL_MAGIC_utf8);
- if (mg)
- mg->mg_len = 0;
- }
- }
- data->last_end = -1;
- data->flags &= ~SF_BEFORE_EOL;
- DEBUG_STUDYDATA("commit: ",data,0);
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_anything(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_ANYTHING;
-
- ANYOF_CLASS_ZERO(cl);
- ANYOF_BITMAP_SETALL(cl);
- cl->flags = ANYOF_EOS|ANYOF_UNICODE_ALL;
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* Can match anything (initialization) */
-STATIC int
-S_cl_is_anything(const struct regnode_charclass_class *cl)
-{
- int value;
-
- PERL_ARGS_ASSERT_CL_IS_ANYTHING;
-
- for (value = 0; value <= ANYOF_MAX; value += 2)
- if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1))
- return 1;
- if (!(cl->flags & ANYOF_UNICODE_ALL))
- return 0;
- if (!ANYOF_BITMAP_TESTALLSET((const void*)cl))
- return 0;
- return 1;
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_init(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
-}
-
-STATIC void
-S_cl_init_zero(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT_ZERO;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* 'And' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_and(struct regnode_charclass_class *cl,
- const struct regnode_charclass_class *and_with)
-{
- PERL_ARGS_ASSERT_CL_AND;
-
- assert(and_with->type == ANYOF);
- if (!(and_with->flags & ANYOF_CLASS)
- && !(cl->flags & ANYOF_CLASS)
- && (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(and_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD)) {
- int i;
-
- if (and_with->flags & ANYOF_INVERT)
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= ~and_with->bitmap[i];
- else
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= and_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise, leave it along for a moment. */
- if (!(and_with->flags & ANYOF_EOS))
- cl->flags &= ~ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE_ALL && and_with->flags & ANYOF_UNICODE &&
- !(and_with->flags & ANYOF_INVERT)) {
- cl->flags &= ~ANYOF_UNICODE_ALL;
- cl->flags |= ANYOF_UNICODE;
- ARG_SET(cl, ARG(and_with));
- }
- if (!(and_with->flags & ANYOF_UNICODE_ALL) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE_ALL;
- if (!(and_with->flags & (ANYOF_UNICODE|ANYOF_UNICODE_ALL)) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE;
-}
-
-/* 'OR' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_or(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl, const struct regnode_charclass_class *or_with)
-{
- PERL_ARGS_ASSERT_CL_OR;
-
- if (or_with->flags & ANYOF_INVERT) {
- /* We do not use
- * (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2))
- * <= (B1 | !B2) | (CL1 | !CL2)
- * which is wasteful if CL2 is small, but we ignore CL2:
- * (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1
- * XXXX Can we handle case-fold? Unclear:
- * (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) =
- * (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i'))
- */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(or_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD) ) {
- int i;
-
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= ~or_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise */
- else {
- cl_anything(pRExC_state, cl);
- }
- } else {
- /* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && (!(or_with->flags & ANYOF_FOLD)
- || (cl->flags & ANYOF_FOLD)) ) {
- int i;
-
- /* OR char bitmap and class bitmap separately */
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= or_with->bitmap[i];
- if (or_with->flags & ANYOF_CLASS) {
- for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++)
- cl->classflags[i] |= or_with->classflags[i];
- cl->flags |= ANYOF_CLASS;
- }
- }
- else { /* XXXX: logic is complicated, leave it along for a moment. */
- cl_anything(pRExC_state, cl);
- }
- }
- if (or_with->flags & ANYOF_EOS)
- cl->flags |= ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE && or_with->flags & ANYOF_UNICODE &&
- ARG(cl) != ARG(or_with)) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
- if (or_with->flags & ANYOF_UNICODE_ALL) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
-}
-
-#define TRIE_LIST_ITEM(state,idx) (trie->states[state].trans.list)[ idx ]
-#define TRIE_LIST_CUR(state) ( TRIE_LIST_ITEM( state, 0 ).forid )
-#define TRIE_LIST_LEN(state) ( TRIE_LIST_ITEM( state, 0 ).newstate )
-#define TRIE_LIST_USED(idx) ( trie->states[state].trans.list ? (TRIE_LIST_CUR( idx ) - 1) : 0 )
-
-
-#ifdef DEBUGGING
-/*
- dump_trie(trie,widecharmap,revcharmap)
- dump_trie_interim_list(trie,widecharmap,revcharmap,next_alloc)
- dump_trie_interim_table(trie,widecharmap,revcharmap,next_alloc)
-
- These routines dump out a trie in a somewhat readable format.
- The _interim_ variants are used for debugging the interim
- tables that are used to generate the final compressed
- representation which is what dump_trie expects.
-
- Part of the reason for their existance is to provide a form
- of documentation as to how the different representations function.
-
-*/
-
-/*
- Dumps the final compressed table form of the trie to Perl_debug_log.
- Used for debugging make_trie().
-*/
-
-STATIC void
-S_dump_trie(pTHX_ const struct _reg_trie_data *trie, HV *widecharmap,
- AV *revcharmap, U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE;
-
- PerlIO_printf( Perl_debug_log, "%*sChar : %-6s%-6s%-4s ",
- (int)depth * 2 + 2,"",
- "Match","Base","Ofs" );
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ ) {
- SV ** const tmp = av_fetch( revcharmap, state, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
- PerlIO_printf( Perl_debug_log, "\n%*sState|-----------------------",
- (int)depth * 2 + 2,"");
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ )
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth, "--------");
- PerlIO_printf( Perl_debug_log, "\n");
-
- for( state = 1 ; state < trie->statecount ; state++ ) {
- const U32 base = trie->states[ state ].trans.base;
-
- PerlIO_printf( Perl_debug_log, "%*s#%4"UVXf"|", (int)depth * 2 + 2,"", (UV)state);
-
- if ( trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " W%4X", trie->states[ state ].wordnum );
- } else {
- PerlIO_printf( Perl_debug_log, "%6s", "" );
- }
-
- PerlIO_printf( Perl_debug_log, " @%4"UVXf" ", (UV)base );
-
- if ( base ) {
- U32 ofs = 0;
-
- while( ( base + ofs < trie->uniquecharcount ) ||
- ( base + ofs - trie->uniquecharcount < trie->lasttrans
- && trie->trans[ base + ofs - trie->uniquecharcount ].check != state))
- ofs++;
-
- PerlIO_printf( Perl_debug_log, "+%2"UVXf"[ ", (UV)ofs);
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- PerlIO_printf( Perl_debug_log, "%*"UVXf,
- colwidth,
- (UV)trie->trans[ base + ofs - trie->uniquecharcount ].next );
- } else {
- PerlIO_printf( Perl_debug_log, "%*s",colwidth," ." );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "]");
-
- }
- PerlIO_printf( Perl_debug_log, "\n" );
- }
-}
-/*
- Dumps a fully constructed but uncompressed trie in list form.
- List tries normally only are used for construction when the number of
- possible chars (trie->uniquecharcount) is very high.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_list(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_LIST;
-
- /* print out the table precompression. */
- PerlIO_printf( Perl_debug_log, "%*sState :Word | Transition Data\n%*s%s",
- (int)depth * 2 + 2,"", (int)depth * 2 + 2,"",
- "------:-----+-----------------\n" );
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U16 charid;
-
- PerlIO_printf( Perl_debug_log, "%*s %4"UVXf" :",
- (int)depth * 2 + 2,"", (UV)state );
- if ( ! trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, "%5s| ","");
- } else {
- PerlIO_printf( Perl_debug_log, "W%4x| ",
- trie->states[ state ].wordnum
- );
- }
- for( charid = 1 ; charid <= TRIE_LIST_USED( state ) ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, TRIE_LIST_ITEM(state,charid).forid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s:%3X=%4"UVXf" | ",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- ) ,
- TRIE_LIST_ITEM(state,charid).forid,
- (UV)TRIE_LIST_ITEM(state,charid).newstate
- );
- if (!(charid % 10))
- PerlIO_printf(Perl_debug_log, "\n%*s| ",
- (int)((depth * 2) + 14), "");
- }
- }
- PerlIO_printf( Perl_debug_log, "\n");
- }
-}
-
-/*
- Dumps a fully constructed but uncompressed trie in table form.
- This is the normal DFA style state transition table, with a few
- twists to facilitate compression later.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_table(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- U16 charid;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_TABLE;
-
- /*
- print out the table precompression so that we can do a visual check
- that they are identical.
- */
-
- PerlIO_printf( Perl_debug_log, "%*sChar : ",(int)depth * 2 + 2,"" );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, charid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "\n%*sState+-",(int)depth * 2 + 2,"" );
-
- for( charid=0 ; charid < trie->uniquecharcount ; charid++ ) {
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth,"--------");
- }
-
- PerlIO_printf( Perl_debug_log, "\n" );
-
- for( state=1 ; state < next_alloc ; state += trie->uniquecharcount ) {
-
- PerlIO_printf( Perl_debug_log, "%*s%4"UVXf" : ",
- (int)depth * 2 + 2,"",
- (UV)TRIE_NODENUM( state ) );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- UV v=(UV)SAFE_TRIE_NODENUM( trie->trans[ state + charid ].next );
- if (v)
- PerlIO_printf( Perl_debug_log, "%*"UVXf, colwidth, v );
- else
- PerlIO_printf( Perl_debug_log, "%*s", colwidth, "." );
- }
- if ( ! trie->states[ TRIE_NODENUM( state ) ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf")\n", (UV)trie->trans[ state ].check );
- } else {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf") W%4X\n", (UV)trie->trans[ state ].check,
- trie->states[ TRIE_NODENUM( state ) ].wordnum );
- }
- }
-}
-
-#endif
-
-/* make_trie(startbranch,first,last,tail,word_count,flags,depth)
- startbranch: the first branch in the whole branch sequence
- first : start branch of sequence of branch-exact nodes.
- May be the same as startbranch
- last : Thing following the last branch.
- May be the same as tail.
- tail : item following the branch sequence
- count : words in the sequence
- flags : currently the OP() type we will be building one of /EXACT(|F|Fl)/
- depth : indent depth
-
-Inplace optimizes a sequence of 2 or more Branch-Exact nodes into a TRIE node.
-
-A trie is an N'ary tree where the branches are determined by digital
-decomposition of the key. IE, at the root node you look up the 1st character and
-follow that branch repeat until you find the end of the branches. Nodes can be
-marked as "accepting" meaning they represent a complete word. Eg:
-
- /he|she|his|hers/
-
-would convert into the following structure. Numbers represent states, letters
-following numbers represent valid transitions on the letter from that state, if
-the number is in square brackets it represents an accepting state, otherwise it
-will be in parenthesis.
-
- +-h->+-e->[3]-+-r->(8)-+-s->[9]
- | |
- | (2)
- | |
- (1) +-i->(6)-+-s->[7]
- |
- +-s->(3)-+-h->(4)-+-e->[5]
-
- Accept Word Mapping: 3=>1 (he),5=>2 (she), 7=>3 (his), 9=>4 (hers)
-
-This shows that when matching against the string 'hers' we will begin at state 1
-read 'h' and move to state 2, read 'e' and move to state 3 which is accepting,
-then read 'r' and go to state 8 followed by 's' which takes us to state 9 which
-is also accepting. Thus we know that we can match both 'he' and 'hers' with a
-single traverse. We store a mapping from accepting to state to which word was
-matched, and then when we have multiple possibilities we try to complete the
-rest of the regex in the order in which they occured in the alternation.
-
-The only prior NFA like behaviour that would be changed by the TRIE support is
-the silent ignoring of duplicate alternations which are of the form:
-
- / (DUPE|DUPE) X? (?{ ... }) Y /x
-
-Thus EVAL blocks follwing a trie may be called a different number of times with
-and without the optimisation. With the optimisations dupes will be silently
-ignored. This inconsistant behaviour of EVAL type nodes is well established as
-the following demonstrates:
-
- 'words'=~/(word|word|word)(?{ print $1 })[xyz]/
-
-which prints out 'word' three times, but
-
- 'words'=~/(word|word|word)(?{ print $1 })S/
-
-which doesnt print it out at all. This is due to other optimisations kicking in.
-
-Example of what happens on a structural level:
-
-The regexp /(ac|ad|ab)+/ will produce the folowing debug output:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: BRANCH(8)
- 6: EXACT <ac>(16)
- 8: BRANCH(11)
- 9: EXACT <ad>(16)
- 11: BRANCH(14)
- 12: EXACT <ab>(16)
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-This would be optimizable with startbranch=5, first=5, last=16, tail=16
-and should turn into:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: TRIE(16)
- [Words:3 Chars Stored:6 Unique Chars:4 States:5 NCP:1]
- <ac>
- <ad>
- <ab>
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-Cases where tail != last would be like /(?foo|bar)baz/:
-
- 1: BRANCH(4)
- 2: EXACT <foo>(8)
- 4: BRANCH(7)
- 5: EXACT <bar>(8)
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
-which would be optimizable with startbranch=1, first=1, last=7, tail=8
-and would end up looking like:
-
- 1: TRIE(8)
- [Words:2 Chars Stored:6 Unique Chars:5 States:7 NCP:1]
- <foo>
- <bar>
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
- d = uvuni_to_utf8_flags(d, uv, 0);
-
-is the recommended Unicode-aware way of saying
-
- *(d++) = uv;
-*/
-
-#define TRIE_STORE_REVCHAR \
- STMT_START { \
- if (UTF) { \
- SV *zlopp = newSV(2); \
- unsigned char *flrbbbbb = (unsigned char *) SvPVX(zlopp); \
- unsigned const char *const kapow = uvuni_to_utf8(flrbbbbb, uvc & 0xFF); \
- SvCUR_set(zlopp, kapow - flrbbbbb); \
- SvPOK_on(zlopp); \
- SvUTF8_on(zlopp); \
- av_push(revcharmap, zlopp); \
- } else { \
- char ooooff = (char)uvc; \
- av_push(revcharmap, newSVpvn(&ooooff, 1)); \
- } \
- } STMT_END
-
-#define TRIE_READ_CHAR STMT_START { \
- wordlen++; \
- if ( UTF ) { \
- if ( folder ) { \
- if ( foldlen > 0 ) { \
- uvc = utf8n_to_uvuni( scan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- scan += len; \
- len = 0; \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- scan = foldbuf + UNISKIP( uvc ); \
- } \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- } \
- } else { \
- uvc = (U32)*uc; \
- len = 1; \
- } \
-} STMT_END
-
-
-
-#define TRIE_LIST_PUSH(state,fid,ns) STMT_START { \
- if ( TRIE_LIST_CUR( state ) >=TRIE_LIST_LEN( state ) ) { \
- U32 ging = TRIE_LIST_LEN( state ) *= 2; \
- Renew( trie->states[ state ].trans.list, ging, reg_trie_trans_le ); \
- } \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).forid = fid; \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).newstate = ns; \
- TRIE_LIST_CUR( state )++; \
-} STMT_END
-
-#define TRIE_LIST_NEW(state) STMT_START { \
- Newxz( trie->states[ state ].trans.list, \
- 4, reg_trie_trans_le ); \
- TRIE_LIST_CUR( state ) = 1; \
- TRIE_LIST_LEN( state ) = 4; \
-} STMT_END
-
-#define TRIE_HANDLE_WORD(state) STMT_START { \
- U16 dupe= trie->states[ state ].wordnum; \
- regnode * const noper_next = regnext( noper ); \
- \
- if (trie->wordlen) \
- trie->wordlen[ curword ] = wordlen; \
- DEBUG_r({ \
- /* store the word for dumping */ \
- SV* tmp; \
- if (OP(noper) != NOTHING) \
- tmp = newSVpvn_utf8(STRING(noper), STR_LEN(noper), UTF); \
- else \
- tmp = newSVpvn_utf8( "", 0, UTF ); \
- av_push( trie_words, tmp ); \
- }); \
- \
- curword++; \
- \
- if ( noper_next < tail ) { \
- if (!trie->jump) \
- trie->jump = (U16 *) PerlMemShared_calloc( word_count + 1, sizeof(U16) ); \
- trie->jump[curword] = (U16)(noper_next - convert); \
- if (!jumper) \
- jumper = noper_next; \
- if (!nextbranch) \
- nextbranch= regnext(cur); \
- } \
- \
- if ( dupe ) { \
- /* So it's a dupe. This means we need to maintain a */\
- /* linked-list from the first to the next. */\
- /* we only allocate the nextword buffer when there */\
- /* a dupe, so first time we have to do the allocation */\
- if (!trie->nextword) \
- trie->nextword = (U16 *) \
- PerlMemShared_calloc( word_count + 1, sizeof(U16)); \
- while ( trie->nextword[dupe] ) \
- dupe= trie->nextword[dupe]; \
- trie->nextword[dupe]= curword; \
- } else { \
- /* we haven't inserted this word yet. */ \
- trie->states[ state ].wordnum = curword; \
- } \
-} STMT_END
-
-
-#define TRIE_TRANS_STATE(state,base,ucharcount,charid,special) \
- ( ( base + charid >= ucharcount \
- && base + charid < ubound \
- && state == trie->trans[ base - ucharcount + charid ].check \
- && trie->trans[ base - ucharcount + charid ].next ) \
- ? trie->trans[ base - ucharcount + charid ].next \
- : ( state==1 ? special : 0 ) \
- )
-
-#define MADE_TRIE 1
-#define MADE_JUMP_TRIE 2
-#define MADE_EXACT_TRIE 4
-
-STATIC I32
-S_make_trie(pTHX_ RExC_state_t *pRExC_state, regnode *startbranch, regnode *first, regnode *last, regnode *tail, U32 word_count, U32 flags, U32 depth)
-{
- dVAR;
- /* first pass, loop through and scan words */
- reg_trie_data *trie;
- HV *widecharmap = NULL;
- AV *revcharmap = newAV();
- regnode *cur;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- STRLEN len = 0;
- UV uvc = 0;
- U16 curword = 0;
- U32 next_alloc = 0;
- regnode *jumper = NULL;
- regnode *nextbranch = NULL;
- regnode *convert = NULL;
- /* we just use folder as a flag in utf8 */
- const U8 * const folder = ( flags == EXACTF
- ? PL_fold
- : ( flags == EXACTFL
- ? PL_fold_locale
- : NULL
- )
- );
-
-#ifdef DEBUGGING
- const U32 data_slot = add_data( pRExC_state, 4, "tuuu" );
- AV *trie_words = NULL;
- /* along with revcharmap, this only used during construction but both are
- * useful during debugging so we store them in the struct when debugging.
- */
-#else
- const U32 data_slot = add_data( pRExC_state, 2, "tu" );
- STRLEN trie_charcount=0;
-#endif
- SV *re_trie_maxbuff;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- trie = (reg_trie_data *) PerlMemShared_calloc( 1, sizeof(reg_trie_data) );
- trie->refcount = 1;
- trie->startstate = 1;
- trie->wordcount = word_count;
- RExC_rxi->data->data[ data_slot ] = (void*)trie;
- trie->charmap = (U16 *) PerlMemShared_calloc( 256, sizeof(U16) );
- if (!(UTF && folder))
- trie->bitmap = (char *) PerlMemShared_calloc( ANYOF_BITMAP_SIZE, 1 );
- DEBUG_r({
- trie_words = newAV();
- });
-
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff)) {
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- DEBUG_OPTIMISE_r({
- PerlIO_printf( Perl_debug_log,
- "%*smake_trie start==%d, first==%d, last==%d, tail==%d depth=%d\n",
- (int)depth * 2 + 2, "",
- REG_NODE_NUM(startbranch),REG_NODE_NUM(first),
- REG_NODE_NUM(last), REG_NODE_NUM(tail),
- (int)depth);
- });
-
- /* Find the node we are going to overwrite */
- if ( first == startbranch && OP( last ) != BRANCH ) {
- /* whole branch chain */
- convert = first;
- } else {
- /* branch sub-chain */
- convert = NEXTOPER( first );
- }
-
- /* -- First loop and Setup --
-
- We first traverse the branches and scan each word to determine if it
- contains widechars, and how many unique chars there are, this is
- important as we have to build a table with at least as many columns as we
- have unique chars.
-
- We use an array of integers to represent the character codes 0..255
- (trie->charmap) and we use a an HV* to store Unicode characters. We use the
- native representation of the character value as the key and IV's for the
- coded index.
-
- *TODO* If we keep track of how many times each character is used we can
- remap the columns so that the table compression later on is more
- efficient in terms of memory by ensuring most common value is in the
- middle and the least common are on the outside. IMO this would be better
- than a most to least common mapping as theres a decent chance the most
- common letter will share a node with the least common, meaning the node
- will not be compressable. With a middle is most common approach the worst
- case is when we have the least common nodes twice.
-
- */
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- STRLEN foldlen = 0;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- const U8 *scan = (U8*)NULL;
- U32 wordlen = 0; /* required init */
- STRLEN chars = 0;
- bool set_bit = trie->bitmap ? 1 : 0; /*store the first char in the bitmap?*/
-
- if (OP(noper) == NOTHING) {
- trie->minlen= 0;
- continue;
- }
- if ( set_bit ) /* bitmap only alloced when !(UTF&&Folding) */
- TRIE_BITMAP_SET(trie,*uc); /* store the raw first byte
- regardless of encoding */
-
- for ( ; uc < e ; uc += len ) {
- TRIE_CHARCOUNT(trie)++;
- TRIE_READ_CHAR;
- chars++;
- if ( uvc < 256 ) {
- if ( !trie->charmap[ uvc ] ) {
- trie->charmap[ uvc ]=( ++trie->uniquecharcount );
- if ( folder )
- trie->charmap[ folder[ uvc ] ] = trie->charmap[ uvc ];
- TRIE_STORE_REVCHAR;
- }
- if ( set_bit ) {
- /* store the codepoint in the bitmap, and if its ascii
- also store its folded equivelent. */
- TRIE_BITMAP_SET(trie,uvc);
-
- /* store the folded codepoint */
- if ( folder ) TRIE_BITMAP_SET(trie,folder[ uvc ]);
-
- if ( !UTF ) {
- /* store first byte of utf8 representation of
- codepoints in the 127 < uvc < 256 range */
- if (127 < uvc && uvc < 192) {
- TRIE_BITMAP_SET(trie,194);
- } else if (191 < uvc ) {
- TRIE_BITMAP_SET(trie,195);
- /* && uvc < 256 -- we know uvc is < 256 already */
- }
- }
- set_bit = 0; /* We've done our bit :-) */
- }
- } else {
- SV** svpp;
- if ( !widecharmap )
- widecharmap = newHV();
-
- svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 1 );
-
- if ( !svpp )
- Perl_croak( aTHX_ "error creating/fetching widecharmap entry for 0x%"UVXf, uvc );
-
- if ( !SvTRUE( *svpp ) ) {
- sv_setiv( *svpp, ++trie->uniquecharcount );
- TRIE_STORE_REVCHAR;
- }
- }
- }
- if( cur == first ) {
- trie->minlen=chars;
- trie->maxlen=chars;
- } else if (chars < trie->minlen) {
- trie->minlen=chars;
- } else if (chars > trie->maxlen) {
- trie->maxlen=chars;
- }
-
- } /* end first pass */
- DEBUG_TRIE_COMPILE_r(
- PerlIO_printf( Perl_debug_log, "%*sTRIE(%s): W:%d C:%d Uq:%d Min:%d Max:%d\n",
- (int)depth * 2 + 2,"",
- ( widecharmap ? "UTF8" : "NATIVE" ), (int)word_count,
- (int)TRIE_CHARCOUNT(trie), trie->uniquecharcount,
- (int)trie->minlen, (int)trie->maxlen )
- );
- trie->wordlen = (U32 *) PerlMemShared_calloc( word_count, sizeof(U32) );
-
- /*
- We now know what we are dealing with in terms of unique chars and
- string sizes so we can calculate how much memory a naive
- representation using a flat table will take. If it's over a reasonable
- limit (as specified by ${^RE_TRIE_MAXBUF}) we use a more memory
- conservative but potentially much slower representation using an array
- of lists.
-
- At the end we convert both representations into the same compressed
- form that will be used in regexec.c for matching with. The latter
- is a form that cannot be used to construct with but has memory
- properties similar to the list form and access properties similar
- to the table form making it both suitable for fast searches and
- small enough that its feasable to store for the duration of a program.
-
- See the comment in the code where the compressed table is produced
- inplace from the flat tabe representation for an explanation of how
- the compression works.
-
- */
-
-
- if ( (IV)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1) > SvIV(re_trie_maxbuff) ) {
- /*
- Second Pass -- Array Of Lists Representation
-
- Each state will be represented by a list of charid:state records
- (reg_trie_trans_le) the first such element holds the CUR and LEN
- points of the allocated array. (See defines above).
-
- We build the initial structure using the lists, and then convert
- it into the compressed table form which allows faster lookups
- (but cant be modified once converted).
- */
-
- STRLEN transcount = 1;
-
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using list compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- TRIE_LIST_NEW(1);
- next_alloc = 2;
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- U32 state = 1; /* required init */
- U16 charid = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if (OP(noper) != NOTHING) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV** const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- if ( !svpp ) {
- charid = 0;
- } else {
- charid=(U16)SvIV( *svpp );
- }
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- if ( charid ) {
-
- U16 check;
- U32 newstate = 0;
-
- charid--;
- if ( !trie->states[ state ].trans.list ) {
- TRIE_LIST_NEW( state );
- }
- for ( check = 1; check <= TRIE_LIST_USED( state ); check++ ) {
- if ( TRIE_LIST_ITEM( state, check ).forid == charid ) {
- newstate = TRIE_LIST_ITEM( state, check ).newstate;
- break;
- }
- }
- if ( ! newstate ) {
- newstate = next_alloc++;
- TRIE_LIST_PUSH( state, charid, newstate );
- transcount++;
- }
- state = newstate;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- }
- }
- TRIE_HANDLE_WORD(state);
-
- } /* end second pass */
-
- /* next alloc is the NEXT state to be allocated */
- trie->statecount = next_alloc;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states,
- next_alloc
- * sizeof(reg_trie_state) );
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_list(trie, widecharmap,
- revcharmap, next_alloc,
- depth+1)
- );
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( transcount, sizeof(reg_trie_trans) );
- {
- U32 state;
- U32 tp = 0;
- U32 zp = 0;
-
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U32 base=0;
-
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, "tp: %d zp: %d ",tp,zp)
- );
- */
-
- if (trie->states[state].trans.list) {
- U16 minid=TRIE_LIST_ITEM( state, 1).forid;
- U16 maxid=minid;
- U16 idx;
-
- for( idx = 2 ; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U16 forid = TRIE_LIST_ITEM( state, idx).forid;
- if ( forid < minid ) {
- minid=forid;
- } else if ( forid > maxid ) {
- maxid=forid;
- }
- }
- if ( transcount < tp + maxid - minid + 1) {
- transcount *= 2;
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans,
- transcount
- * sizeof(reg_trie_trans) );
- Zero( trie->trans + (transcount / 2), transcount / 2 , reg_trie_trans );
- }
- base = trie->uniquecharcount + tp - minid;
- if ( maxid == minid ) {
- U32 set = 0;
- for ( ; zp < tp ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- base = trie->uniquecharcount + zp - minid;
- trie->trans[ zp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ zp ].check = state;
- set = 1;
- break;
- }
- }
- if ( !set ) {
- trie->trans[ tp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ tp ].check = state;
- tp++;
- zp = tp;
- }
- } else {
- for ( idx=1; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U32 tid = base - trie->uniquecharcount + TRIE_LIST_ITEM( state, idx ).forid;
- trie->trans[ tid ].next = TRIE_LIST_ITEM( state, idx ).newstate;
- trie->trans[ tid ].check = state;
- }
- tp += ( maxid - minid + 1 );
- }
- Safefree(trie->states[ state ].trans.list);
- }
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, " base: %d\n",base);
- );
- */
- trie->states[ state ].trans.base=base;
- }
- trie->lasttrans = tp + 1;
- }
- } else {
- /*
- Second Pass -- Flat Table Representation.
-
- we dont use the 0 slot of either trans[] or states[] so we add 1 to each.
- We know that we will need Charcount+1 trans at most to store the data
- (one row per char at worst case) So we preallocate both structures
- assuming worst case.
-
- We then construct the trie using only the .next slots of the entry
- structs.
-
- We use the .check field of the first entry of the node temporarily to
- make compression both faster and easier by keeping track of how many non
- zero fields are in the node.
-
- Since trans are numbered from 1 any 0 pointer in the table is a FAIL
- transition.
-
- There are two terms at use here: state as a TRIE_NODEIDX() which is a
- number representing the first entry of the node, and state as a
- TRIE_NODENUM() which is the trans number. state 1 is TRIE_NODEIDX(1) and
- TRIE_NODENUM(1), state 2 is TRIE_NODEIDX(2) and TRIE_NODENUM(3) if there
- are 2 entrys per node. eg:
-
- A B A B
- 1. 2 4 1. 3 7
- 2. 0 3 3. 0 5
- 3. 0 0 5. 0 0
- 4. 0 0 7. 0 0
-
- The table is internally in the right hand, idx form. However as we also
- have to deal with the states array which is indexed by nodenum we have to
- use TRIE_NODENUM() to convert.
-
- */
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using table compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( ( TRIE_CHARCOUNT(trie) + 1 )
- * trie->uniquecharcount + 1,
- sizeof(reg_trie_trans) );
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- next_alloc = trie->uniquecharcount + 1;
-
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
-
- U32 state = 1; /* required init */
-
- U16 charid = 0; /* sanity init */
- U32 accept_state = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
-
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if ( OP(noper) != NOTHING ) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV* const * const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- charid = svpp ? (U16)SvIV(*svpp) : 0;
- }
- if ( charid ) {
- charid--;
- if ( !trie->trans[ state + charid ].next ) {
- trie->trans[ state + charid ].next = next_alloc;
- trie->trans[ state ].check++;
- next_alloc += trie->uniquecharcount;
- }
- state = trie->trans[ state + charid ].next;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- }
- }
- accept_state = TRIE_NODENUM( state );
- TRIE_HANDLE_WORD(accept_state);
-
- } /* end second pass */
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_table(trie, widecharmap,
- revcharmap,
- next_alloc, depth+1));
-
- {
- /*
- * Inplace compress the table.*
-
- For sparse data sets the table constructed by the trie algorithm will
- be mostly 0/FAIL transitions or to put it another way mostly empty.
- (Note that leaf nodes will not contain any transitions.)
-
- This algorithm compresses the tables by eliminating most such
- transitions, at the cost of a modest bit of extra work during lookup:
-
- - Each states[] entry contains a .base field which indicates the
- index in the state[] array wheres its transition data is stored.
-
- - If .base is 0 there are no valid transitions from that node.
-
- - If .base is nonzero then charid is added to it to find an entry in
- the trans array.
-
- -If trans[states[state].base+charid].check!=state then the
- transition is taken to be a 0/Fail transition. Thus if there are fail
- transitions at the front of the node then the .base offset will point
- somewhere inside the previous nodes data (or maybe even into a node
- even earlier), but the .check field determines if the transition is
- valid.
-
- XXX - wrong maybe?
- The following process inplace converts the table to the compressed
- table: We first do not compress the root node 1,and mark its all its
- .check pointers as 1 and set its .base pointer as 1 as well. This
- allows to do a DFA construction from the compressed table later, and
- ensures that any .base pointers we calculate later are greater than
- 0.
-
- - We set 'pos' to indicate the first entry of the second node.
-
- - We then iterate over the columns of the node, finding the first and
- last used entry at l and m. We then copy l..m into pos..(pos+m-l),
- and set the .check pointers accordingly, and advance pos
- appropriately and repreat for the next node. Note that when we copy
- the next pointers we have to convert them from the original
- NODEIDX form to NODENUM form as the former is not valid post
- compression.
-
- - If a node has no transitions used we mark its base as 0 and do not
- advance the pos pointer.
-
- - If a node only has one transition we use a second pointer into the
- structure to fill in allocated fail transitions from other states.
- This pointer is independent of the main pointer and scans forward
- looking for null transitions that are allocated to a state. When it
- finds one it writes the single transition into the "hole". If the
- pointer doesnt find one the single transition is appended as normal.
-
- - Once compressed we can Renew/realloc the structures to release the
- excess space.
-
- See "Table-Compression Methods" in sec 3.9 of the Red Dragon,
- specifically Fig 3.47 and the associated pseudocode.
-
- demq
- */
- const U32 laststate = TRIE_NODENUM( next_alloc );
- U32 state, charid;
- U32 pos = 0, zp=0;
- trie->statecount = laststate;
-
- for ( state = 1 ; state < laststate ; state++ ) {
- U8 flag = 0;
- const U32 stateidx = TRIE_NODEIDX( state );
- const U32 o_used = trie->trans[ stateidx ].check;
- U32 used = trie->trans[ stateidx ].check;
- trie->trans[ stateidx ].check = 0;
-
- for ( charid = 0 ; used && charid < trie->uniquecharcount ; charid++ ) {
- if ( flag || trie->trans[ stateidx + charid ].next ) {
- if ( trie->trans[ stateidx + charid ].next ) {
- if (o_used == 1) {
- for ( ; zp < pos ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- break;
- }
- }
- trie->states[ state ].trans.base = zp + trie->uniquecharcount - charid ;
- trie->trans[ zp ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ zp ].check = state;
- if ( ++zp > pos ) pos = zp;
- break;
- }
- used--;
- }
- if ( !flag ) {
- flag = 1;
- trie->states[ state ].trans.base = pos + trie->uniquecharcount - charid ;
- }
- trie->trans[ pos ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ pos ].check = state;
- pos++;
- }
- }
- }
- trie->lasttrans = pos + 1;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states, laststate
- * sizeof(reg_trie_state) );
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log,
- "%*sAlloc: %d Orig: %"IVdf" elements, Final:%"IVdf". Savings of %%%5.2f\n",
- (int)depth * 2 + 2,"",
- (int)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1 ),
- (IV)next_alloc,
- (IV)pos,
- ( ( next_alloc - pos ) * 100 ) / (double)next_alloc );
- );
-
- } /* end table compress */
- }
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf(Perl_debug_log, "%*sStatecount:%"UVxf" Lasttrans:%"UVxf"\n",
- (int)depth * 2 + 2, "",
- (UV)trie->statecount,
- (UV)trie->lasttrans)
- );
- /* resize the trans array to remove unused space */
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans, trie->lasttrans
- * sizeof(reg_trie_trans) );
-
- /* and now dump out the compressed format */
- DEBUG_TRIE_COMPILE_r(dump_trie(trie, widecharmap, revcharmap, depth+1));
-
- { /* Modify the program and insert the new TRIE node*/
- U8 nodetype =(U8)(flags & 0xFF);
- char *str=NULL;
-
-#ifdef DEBUGGING
- regnode *optimize = NULL;
-#ifdef RE_TRACK_PATTERN_OFFSETS
-
- U32 mjd_offset = 0;
- U32 mjd_nodelen = 0;
-#endif /* RE_TRACK_PATTERN_OFFSETS */
-#endif /* DEBUGGING */
- /*
- This means we convert either the first branch or the first Exact,
- depending on whether the thing following (in 'last') is a branch
- or not and whther first is the startbranch (ie is it a sub part of
- the alternation or is it the whole thing.)
- Assuming its a sub part we conver the EXACT otherwise we convert
- the whole branch sequence, including the first.
- */
- /* Find the node we are going to overwrite */
- if ( first != startbranch || OP( last ) == BRANCH ) {
- /* branch sub-chain */
- NEXT_OFF( first ) = (U16)(last - first);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_r({
- mjd_offset= Node_Offset((convert));
- mjd_nodelen= Node_Length((convert));
- });
-#endif
- /* whole branch chain */
- }
-#ifdef RE_TRACK_PATTERN_OFFSETS
- else {
- DEBUG_r({
- const regnode *nop = NEXTOPER( convert );
- mjd_offset= Node_Offset((nop));
- mjd_nodelen= Node_Length((nop));
- });
- }
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%*sMJD offset:%"UVuf" MJD length:%"UVuf"\n",
- (int)depth * 2 + 2, "",
- (UV)mjd_offset, (UV)mjd_nodelen)
- );
-#endif
- /* But first we check to see if there is a common prefix we can
- split out as an EXACT and put in front of the TRIE node. */
- trie->startstate= 1;
- if ( trie->bitmap && !widecharmap && !trie->jump ) {
- U32 state;
- for ( state = 1 ; state < trie->statecount-1 ; state++ ) {
- U32 ofs = 0;
- I32 idx = -1;
- U32 count = 0;
- const U32 base = trie->states[ state ].trans.base;
-
- if ( trie->states[state].wordnum )
- count = 1;
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- if ( ++count > 1 ) {
- SV **tmp = av_fetch( revcharmap, ofs, 0);
- const U8 *ch = (U8*)SvPV_nolen_const( *tmp );
- if ( state == 1 ) break;
- if ( count == 2 ) {
- Zero(trie->bitmap, ANYOF_BITMAP_SIZE, char);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*sNew Start State=%"UVuf" Class: [",
- (int)depth * 2 + 2, "",
- (UV)state));
- if (idx >= 0) {
- SV ** const tmp = av_fetch( revcharmap, idx, 0);
- const U8 * const ch = (U8*)SvPV_nolen_const( *tmp );
-
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie, folder[ *ch ]);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%s", (char*)ch)
- );
- }
- }
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie,folder[ *ch ]);
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"%s", ch));
- }
- idx = ofs;
- }
- }
- if ( count == 1 ) {
- SV **tmp = av_fetch( revcharmap, idx, 0);
- STRLEN len;
- char *ch = SvPV( *tmp, len );
- DEBUG_OPTIMISE_r({
- SV *sv=sv_newmortal();
- PerlIO_printf( Perl_debug_log,
- "%*sPrefix State: %"UVuf" Idx:%"UVuf" Char='%s'\n",
- (int)depth * 2 + 2, "",
- (UV)state, (UV)idx,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 6,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- });
- if ( state==1 ) {
- OP( convert ) = nodetype;
- str=STRING(convert);
- STR_LEN(convert)=0;
- }
- STR_LEN(convert) += len;
- while (len--)
- *str++ = *ch++;
- } else {
-#ifdef DEBUGGING
- if (state>1)
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"]\n"));
-#endif
- break;
- }
- }
- if (str) {
- regnode *n = convert+NODE_SZ_STR(convert);
- NEXT_OFF(convert) = NODE_SZ_STR(convert);
- trie->startstate = state;
- trie->minlen -= (state - 1);
- trie->maxlen -= (state - 1);
-#ifdef DEBUGGING
- /* At least the UNICOS C compiler choked on this
- * being argument to DEBUG_r(), so let's just have
- * it right here. */
- if (
-#ifdef PERL_EXT_RE_BUILD
- 1
-#else
- DEBUG_r_TEST
-#endif
- ) {
- regnode *fix = convert;
- U32 word = trie->wordcount;
- mjd_nodelen++;
- Set_Node_Offset_Length(convert, mjd_offset, state - 1);
- while( ++fix < n ) {
- Set_Node_Offset_Length(fix, 0, 0);
- }
- while (word--) {
- SV ** const tmp = av_fetch( trie_words, word, 0 );
- if (tmp) {
- if ( STR_LEN(convert) <= SvCUR(*tmp) )
- sv_chop(*tmp, SvPV_nolen(*tmp) + STR_LEN(convert));
- else
- sv_chop(*tmp, SvPV_nolen(*tmp) + SvCUR(*tmp));
- }
- }
- }
-#endif
- if (trie->maxlen) {
- convert = n;
- } else {
- NEXT_OFF(convert) = (U16)(tail - convert);
- DEBUG_r(optimize= n);
- }
- }
- }
- if (!jumper)
- jumper = last;
- if ( trie->maxlen ) {
- NEXT_OFF( convert ) = (U16)(tail - convert);
- ARG_SET( convert, data_slot );
- /* Store the offset to the first unabsorbed branch in
- jump[0], which is otherwise unused by the jump logic.
- We use this when dumping a trie and during optimisation. */
- if (trie->jump)
- trie->jump[0] = (U16)(nextbranch - convert);
-
- /* XXXX */
- if ( !trie->states[trie->startstate].wordnum && trie->bitmap &&
- ( (char *)jumper - (char *)convert) >= (int)sizeof(struct regnode_charclass) )
- {
- OP( convert ) = TRIEC;
- Copy(trie->bitmap, ((struct regnode_charclass *)convert)->bitmap, ANYOF_BITMAP_SIZE, char);
- PerlMemShared_free(trie->bitmap);
- trie->bitmap= NULL;
- } else
- OP( convert ) = TRIE;
-
- /* store the type in the flags */
- convert->flags = nodetype;
- DEBUG_r({
- optimize = convert
- + NODE_STEP_REGNODE
- + regarglen[ OP( convert ) ];
- });
- /* XXX We really should free up the resource in trie now,
- as we won't use them - (which resources?) dmq */
- }
- /* needed for dumping*/
- DEBUG_r(if (optimize) {
- regnode *opt = convert;
-
- while ( ++opt < optimize) {
- Set_Node_Offset_Length(opt,0,0);
- }
- /*
- Try to clean up some of the debris left after the
- optimisation.
- */
- while( optimize < jumper ) {
- mjd_nodelen += Node_Length((optimize));
- OP( optimize ) = OPTIMIZED;
- Set_Node_Offset_Length(optimize,0,0);
- optimize++;
- }
- Set_Node_Offset_Length(convert,mjd_offset,mjd_nodelen);
- });
- } /* end node insert */
- RExC_rxi->data->data[ data_slot + 1 ] = (void*)widecharmap;
-#ifdef DEBUGGING
- RExC_rxi->data->data[ data_slot + TRIE_WORDS_OFFSET ] = (void*)trie_words;
- RExC_rxi->data->data[ data_slot + 3 ] = (void*)revcharmap;
-#else
- SvREFCNT_dec(revcharmap);
-#endif
- return trie->jump
- ? MADE_JUMP_TRIE
- : trie->startstate>1
- ? MADE_EXACT_TRIE
- : MADE_TRIE;
-}
-
-STATIC void
-S_make_trie_failtable(pTHX_ RExC_state_t *pRExC_state, regnode *source, regnode *stclass, U32 depth)
-{
-/* The Trie is constructed and compressed now so we can build a fail array now if its needed
-
- This is basically the Aho-Corasick algorithm. Its from exercise 3.31 and 3.32 in the
- "Red Dragon" -- Compilers, principles, techniques, and tools. Aho, Sethi, Ullman 1985/88
- ISBN 0-201-10088-6
-
- We find the fail state for each state in the trie, this state is the longest proper
- suffix of the current states 'word' that is also a proper prefix of another word in our
- trie. State 1 represents the word '' and is the thus the default fail state. This allows
- the DFA not to have to restart after its tried and failed a word at a given point, it
- simply continues as though it had been matching the other word in the first place.
- Consider
- 'abcdgu'=~/abcdefg|cdgu/
- When we get to 'd' we are still matching the first word, we would encounter 'g' which would
- fail, which would bring use to the state representing 'd' in the second word where we would
- try 'g' and succeed, prodceding to match 'cdgu'.
- */
- /* add a fail transition */
- const U32 trie_offset = ARG(source);
- reg_trie_data *trie=(reg_trie_data *)RExC_rxi->data->data[trie_offset];
- U32 *q;
- const U32 ucharcount = trie->uniquecharcount;
- const U32 numstates = trie->statecount;
- const U32 ubound = trie->lasttrans + ucharcount;
- U32 q_read = 0;
- U32 q_write = 0;
- U32 charid;
- U32 base = trie->states[ 1 ].trans.base;
- U32 *fail;
- reg_ac_data *aho;
- const U32 data_slot = add_data( pRExC_state, 1, "T" );
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE_FAILTABLE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
-
- ARG_SET( stclass, data_slot );
- aho = (reg_ac_data *) PerlMemShared_calloc( 1, sizeof(reg_ac_data) );
- RExC_rxi->data->data[ data_slot ] = (void*)aho;
- aho->trie=trie_offset;
- aho->states=(reg_trie_state *)PerlMemShared_malloc( numstates * sizeof(reg_trie_state) );
- Copy( trie->states, aho->states, numstates, reg_trie_state );
- Newxz( q, numstates, U32);
- aho->fail = (U32 *) PerlMemShared_calloc( numstates, sizeof(U32) );
- aho->refcount = 1;
- fail = aho->fail;
- /* initialize fail[0..1] to be 1 so that we always have
- a valid final fail state */
- fail[ 0 ] = fail[ 1 ] = 1;
-
- for ( charid = 0; charid < ucharcount ; charid++ ) {
- const U32 newstate = TRIE_TRANS_STATE( 1, base, ucharcount, charid, 0 );
- if ( newstate ) {
- q[ q_write ] = newstate;
- /* set to point at the root */
- fail[ q[ q_write++ ] ]=1;
- }
- }
- while ( q_read < q_write) {
- const U32 cur = q[ q_read++ % numstates ];
- base = trie->states[ cur ].trans.base;
-
- for ( charid = 0 ; charid < ucharcount ; charid++ ) {
- const U32 ch_state = TRIE_TRANS_STATE( cur, base, ucharcount, charid, 1 );
- if (ch_state) {
- U32 fail_state = cur;
- U32 fail_base;
- do {
- fail_state = fail[ fail_state ];
- fail_base = aho->states[ fail_state ].trans.base;
- } while ( !TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ) );
-
- fail_state = TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 );
- fail[ ch_state ] = fail_state;
- if ( !aho->states[ ch_state ].wordnum && aho->states[ fail_state ].wordnum )
- {
- aho->states[ ch_state ].wordnum = aho->states[ fail_state ].wordnum;
- }
- q[ q_write++ % numstates] = ch_state;
- }
- }
- }
- /* restore fail[0..1] to 0 so that we "fall out" of the AC loop
- when we fail in state 1, this allows us to use the
- charclass scan to find a valid start char. This is based on the principle
- that theres a good chance the string being searched contains lots of stuff
- that cant be a start char.
- */
- fail[ 0 ] = fail[ 1 ] = 0;
- DEBUG_TRIE_COMPILE_r({
- PerlIO_printf(Perl_debug_log,
- "%*sStclass Failtable (%"UVuf" states): 0",
- (int)(depth * 2), "", (UV)numstates
- );
- for( q_read=1; q_read<numstates; q_read++ ) {
- PerlIO_printf(Perl_debug_log, ", %"UVuf, (UV)fail[q_read]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
- Safefree(q);
- /*RExC_seen |= REG_SEEN_TRIEDFA;*/
-}
-
-
-/*
- * There are strange code-generation bugs caused on sparc64 by gcc-2.95.2.
- * These need to be revisited when a newer toolchain becomes available.
- */
-#if defined(__sparc64__) && defined(__GNUC__)
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
-# undef SPARC64_GCC_WORKAROUND
-# define SPARC64_GCC_WORKAROUND 1
-# endif
-#endif
-
-#define DEBUG_PEEP(str,scan,depth) \
- DEBUG_OPTIMISE_r({if (scan){ \
- SV * const mysv=sv_newmortal(); \
- regnode *Next = regnext(scan); \
- regprop(RExC_rx, mysv, scan); \
- PerlIO_printf(Perl_debug_log, "%*s" str ">%3d: %s (%d)\n", \
- (int)depth*2, "", REG_NODE_NUM(scan), SvPV_nolen_const(mysv),\
- Next ? (REG_NODE_NUM(Next)) : 0 ); \
- }});
-
-
-
-
-
-#define JOIN_EXACT(scan,min,flags) \
- if (PL_regkind[OP(scan)] == EXACT) \
- join_exact(pRExC_state,(scan),(min),(flags),NULL,depth+1)
-
-STATIC U32
-S_join_exact(pTHX_ RExC_state_t *pRExC_state, regnode *scan, I32 *min, U32 flags,regnode *val, U32 depth) {
- /* Merge several consecutive EXACTish nodes into one. */
- regnode *n = regnext(scan);
- U32 stringok = 1;
- regnode *next = scan + NODE_SZ_STR(scan);
- U32 merged = 0;
- U32 stopnow = 0;
-#ifdef DEBUGGING
- regnode *stop = scan;
- GET_RE_DEBUG_FLAGS_DECL;
-#else
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_JOIN_EXACT;
-#ifndef EXPERIMENTAL_INPLACESCAN
- PERL_UNUSED_ARG(flags);
- PERL_UNUSED_ARG(val);
-#endif
- DEBUG_PEEP("join",scan,depth);
-
- /* Skip NOTHING, merge EXACT*. */
- while (n &&
- ( PL_regkind[OP(n)] == NOTHING ||
- (stringok && (OP(n) == OP(scan))))
- && NEXT_OFF(n)
- && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) {
-
- if (OP(n) == TAIL || n > next)
- stringok = 0;
- if (PL_regkind[OP(n)] == NOTHING) {
- DEBUG_PEEP("skip:",n,depth);
- NEXT_OFF(scan) += NEXT_OFF(n);
- next = n + NODE_STEP_REGNODE;
-#ifdef DEBUGGING
- if (stringok)
- stop = n;
-#endif
- n = regnext(n);
- }
- else if (stringok) {
- const unsigned int oldl = STR_LEN(scan);
- regnode * const nnext = regnext(n);
-
- DEBUG_PEEP("merg",n,depth);
-
- merged++;
- if (oldl + STR_LEN(n) > U8_MAX)
- break;
- NEXT_OFF(scan) += NEXT_OFF(n);
- STR_LEN(scan) += STR_LEN(n);
- next = n + NODE_SZ_STR(n);
- /* Now we can overwrite *n : */
- Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char);
-#ifdef DEBUGGING
- stop = next - 1;
-#endif
- n = nnext;
- if (stopnow) break;
- }
-
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (flags && !NEXT_OFF(n)) {
- DEBUG_PEEP("atch", val, depth);
- if (reg_off_by_arg[OP(n)]) {
- ARG_SET(n, val - n);
- }
- else {
- NEXT_OFF(n) = val - n;
- }
- stopnow = 1;
- }
-#endif
- }
-
- if (UTF && ( OP(scan) == EXACTF ) && ( STR_LEN(scan) >= 6 ) ) {
- /*
- Two problematic code points in Unicode casefolding of EXACT nodes:
-
- U+0390 - GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS
- U+03B0 - GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS
-
- which casefold to
-
- Unicode UTF-8
-
- U+03B9 U+0308 U+0301 0xCE 0xB9 0xCC 0x88 0xCC 0x81
- U+03C5 U+0308 U+0301 0xCF 0x85 0xCC 0x88 0xCC 0x81
-
- This means that in case-insensitive matching (or "loose matching",
- as Unicode calls it), an EXACTF of length six (the UTF-8 encoded byte
- length of the above casefolded versions) can match a target string
- of length two (the byte length of UTF-8 encoded U+0390 or U+03B0).
- This would rather mess up the minimum length computation.
-
- What we'll do is to look for the tail four bytes, and then peek
- at the preceding two bytes to see whether we need to decrease
- the minimum length by four (six minus two).
-
- Thanks to the design of UTF-8, there cannot be false matches:
- A sequence of valid UTF-8 bytes cannot be a subsequence of
- another valid sequence of UTF-8 bytes.
-
- */
- char * const s0 = STRING(scan), *s, *t;
- char * const s1 = s0 + STR_LEN(scan) - 1;
- char * const s2 = s1 - 4;
-#ifdef EBCDIC /* RD tunifold greek 0390 and 03B0 */
- const char t0[] = "\xaf\x49\xaf\x42";
-#else
- const char t0[] = "\xcc\x88\xcc\x81";
-#endif
- const char * const t1 = t0 + 3;
-
- for (s = s0 + 2;
- s < s2 && (t = ninstr(s, s1, t0, t1));
- s = t + 4) {
-#ifdef EBCDIC
- if (((U8)t[-1] == 0x68 && (U8)t[-2] == 0xB4) ||
- ((U8)t[-1] == 0x46 && (U8)t[-2] == 0xB5))
-#else
- if (((U8)t[-1] == 0xB9 && (U8)t[-2] == 0xCE) ||
- ((U8)t[-1] == 0x85 && (U8)t[-2] == 0xCF))
-#endif
- *min -= 4;
- }
- }
-
-#ifdef DEBUGGING
- /* Allow dumping */
- n = scan + NODE_SZ_STR(scan);
- while (n <= stop) {
- if (PL_regkind[OP(n)] != NOTHING || OP(n) == NOTHING) {
- OP(n) = OPTIMIZED;
- NEXT_OFF(n) = 0;
- }
- n++;
- }
-#endif
- DEBUG_OPTIMISE_r(if (merged){DEBUG_PEEP("finl",scan,depth)});
- return stopnow;
-}
-
-/* REx optimizer. Converts nodes into quickier variants "in place".
- Finds fixed substrings. */
-
-/* Stops at toplevel WHILEM as well as at "last". At end *scanp is set
- to the position after last scanned or to NULL. */
-
-#define INIT_AND_WITHP \
- assert(!and_withp); \
- Newx(and_withp,1,struct regnode_charclass_class); \
- SAVEFREEPV(and_withp)
-
-/* this is a chain of data about sub patterns we are processing that
- need to be handled seperately/specially in study_chunk. Its so
- we can simulate recursion without losing state. */
-struct scan_frame;
-typedef struct scan_frame {
- regnode *last; /* last node to process in this frame */
- regnode *next; /* next node to process when last is reached */
- struct scan_frame *prev; /*previous frame*/
- I32 stop; /* what stopparen do we use */
-} scan_frame;
-
-
-#define SCAN_COMMIT(s, data, m) scan_commit(s, data, m, is_inf)
-
-#define CASE_SYNST_FNC(nAmE) \
-case nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break; \
-case N ## nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break
-
-
-
-STATIC I32
-S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp,
- I32 *minlenp, I32 *deltap,
- regnode *last,
- scan_data_t *data,
- I32 stopparen,
- U8* recursed,
- struct regnode_charclass_class *and_withp,
- U32 flags, U32 depth)
- /* scanp: Start here (read-write). */
- /* deltap: Write maxlen-minlen here. */
- /* last: Stop before this one. */
- /* data: string data about the pattern */
- /* stopparen: treat close N as END */
- /* recursed: which subroutines have we recursed into */
- /* and_withp: Valid if flags & SCF_DO_STCLASS_OR */
-{
- dVAR;
- I32 min = 0, pars = 0, code;
- regnode *scan = *scanp, *next;
- I32 delta = 0;
- int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF);
- int is_inf_internal = 0; /* The studied chunk is infinite */
- I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0;
- scan_data_t data_fake;
- SV *re_trie_maxbuff = NULL;
- regnode *first_non_open = scan;
- I32 stopmin = I32_MAX;
- scan_frame *frame = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_STUDY_CHUNK;
-
-#ifdef DEBUGGING
- StructCopy(&zero_scan_data, &data_fake, scan_data_t);
-#endif
-
- if ( depth == 0 ) {
- while (first_non_open && OP(first_non_open) == OPEN)
- first_non_open=regnext(first_non_open);
- }
-
-
- fake_study_recurse:
- while ( scan && OP(scan) != END && scan < last ){
- /* Peephole optimizer: */
- DEBUG_STUDYDATA("Peep:", data,depth);
- DEBUG_PEEP("Peep",scan,depth);
- JOIN_EXACT(scan,&min,0);
-
- /* Follow the next-chain of the current node and optimize
- away all the NOTHINGs from it. */
- if (OP(scan) != CURLYX) {
- const int max = (reg_off_by_arg[OP(scan)]
- ? I32_MAX
- /* I32 may be smaller than U16 on CRAYs! */
- : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX));
- int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan));
- int noff;
- regnode *n = scan;
-
- /* Skip NOTHING and LONGJMP. */
- while ((n = regnext(n))
- && ((PL_regkind[OP(n)] == NOTHING && (noff = NEXT_OFF(n)))
- || ((OP(n) == LONGJMP) && (noff = ARG(n))))
- && off + noff < max)
- off += noff;
- if (reg_off_by_arg[OP(scan)])
- ARG(scan) = off;
- else
- NEXT_OFF(scan) = off;
- }
-
-
-
- /* The principal pseudo-switch. Cannot be a switch, since we
- look into several different things. */
- if (OP(scan) == BRANCH || OP(scan) == BRANCHJ
- || OP(scan) == IFTHEN) {
- next = regnext(scan);
- code = OP(scan);
- /* demq: the op(next)==code check is to see if we have "branch-branch" AFAICT */
-
- if (OP(next) == code || code == IFTHEN) {
- /* NOTE - There is similar code to this block below for handling
- TRIE nodes on a re-study. If you change stuff here check there
- too. */
- I32 max1 = 0, min1 = I32_MAX, num = 0;
- struct regnode_charclass_class accum;
- regnode * const startbranch=scan;
-
- if (flags & SCF_DO_SUBSTR)
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- while (OP(scan) == code) {
- I32 deltanext, minnext, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- num++;
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
-
- data_fake.pos_delta = delta;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- if (code != BRANCH)
- scan = NEXTOPER(scan);
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- /* we suppose the run is continuous, last=next...*/
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- next, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- if (min1 > minnext)
- min1 = minnext;
- if (max1 < minnext + deltanext)
- max1 = minnext + deltanext;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
- scan = next;
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > minnext)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- if (code == IFTHEN && num < 2) /* Empty ELSE branch */
- min1 = 0;
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
-
- if (PERL_ENABLE_TRIE_OPTIMISATION && OP( startbranch ) == BRANCH ) {
- /* demq.
-
- Assuming this was/is a branch we are dealing with: 'scan' now
- points at the item that follows the branch sequence, whatever
- it is. We now start at the beginning of the sequence and look
- for subsequences of
-
- BRANCH->EXACT=>x1
- BRANCH->EXACT=>x2
- tail
-
- which would be constructed from a pattern like /A|LIST|OF|WORDS/
-
- If we can find such a subseqence we need to turn the first
- element into a trie and then add the subsequent branch exact
- strings to the trie.
-
- We have two cases
-
- 1. patterns where the whole set of branch can be converted.
-
- 2. patterns where only a subset can be converted.
-
- In case 1 we can replace the whole set with a single regop
- for the trie. In case 2 we need to keep the start and end
- branchs so
-
- 'BRANCH EXACT; BRANCH EXACT; BRANCH X'
- becomes BRANCH TRIE; BRANCH X;
-
- There is an additional case, that being where there is a
- common prefix, which gets split out into an EXACT like node
- preceding the TRIE node.
-
- If x(1..n)==tail then we can do a simple trie, if not we make
- a "jump" trie, such that when we match the appropriate word
- we "jump" to the appopriate tail node. Essentailly we turn
- a nested if into a case structure of sorts.
-
- */
-
- int made=0;
- if (!re_trie_maxbuff) {
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff))
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- if ( SvIV(re_trie_maxbuff)>=0 ) {
- regnode *cur;
- regnode *first = (regnode *)NULL;
- regnode *last = (regnode *)NULL;
- regnode *tail = scan;
- U8 optype = 0;
- U32 count=0;
-
-#ifdef DEBUGGING
- SV * const mysv = sv_newmortal(); /* for dumping */
-#endif
- /* var tail is used because there may be a TAIL
- regop in the way. Ie, the exacts will point to the
- thing following the TAIL, but the last branch will
- point at the TAIL. So we advance tail. If we
- have nested (?:) we may have to move through several
- tails.
- */
-
- while ( OP( tail ) == TAIL ) {
- /* this is the TAIL generated by (?:) */
- tail = regnext( tail );
- }
-
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, tail );
- PerlIO_printf( Perl_debug_log, "%*s%s%s\n",
- (int)depth * 2 + 2, "",
- "Looking for TRIE'able sequences. Tail node is: ",
- SvPV_nolen_const( mysv )
- );
- });
-
- /*
-
- step through the branches, cur represents each
- branch, noper is the first thing to be matched
- as part of that branch and noper_next is the
- regnext() of that node. if noper is an EXACT
- and noper_next is the same as scan (our current
- position in the regex) then the EXACT branch is
- a possible optimization target. Once we have
- two or more consequetive such branches we can
- create a trie of the EXACT's contents and stich
- it in place. If the sequence represents all of
- the branches we eliminate the whole thing and
- replace it with a single TRIE. If it is a
- subsequence then we need to stitch it in. This
- means the first branch has to remain, and needs
- to be repointed at the item on the branch chain
- following the last branch optimized. This could
- be either a BRANCH, in which case the
- subsequence is internal, or it could be the
- item following the branch sequence in which
- case the subsequence is at the end.
-
- */
-
- /* dont use tail as the end marker for this traverse */
- for ( cur = startbranch ; cur != scan ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
-#if defined(DEBUGGING) || defined(NOJUMPTRIE)
- regnode * const noper_next = regnext( noper );
-#endif
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log, "%*s- %s (%d)",
- (int)depth * 2 + 2,"", SvPV_nolen_const( mysv ), REG_NODE_NUM(cur) );
-
- regprop(RExC_rx, mysv, noper);
- PerlIO_printf( Perl_debug_log, " -> %s",
- SvPV_nolen_const(mysv));
-
- if ( noper_next ) {
- regprop(RExC_rx, mysv, noper_next );
- PerlIO_printf( Perl_debug_log,"\t=> %s\t",
- SvPV_nolen_const(mysv));
- }
- PerlIO_printf( Perl_debug_log, "(First==%d,Last==%d,Cur==%d)\n",
- REG_NODE_NUM(first), REG_NODE_NUM(last), REG_NODE_NUM(cur) );
- });
- if ( (((first && optype!=NOTHING) ? OP( noper ) == optype
- : PL_regkind[ OP( noper ) ] == EXACT )
- || OP(noper) == NOTHING )
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- && count < U16_MAX)
- {
- count++;
- if ( !first || optype == NOTHING ) {
- if (!first) first = cur;
- optype = OP( noper );
- } else {
- last = cur;
- }
- } else {
-/*
- Currently we do not believe that the trie logic can
- handle case insensitive matching properly when the
- pattern is not unicode (thus forcing unicode semantics).
-
- If/when this is fixed the following define can be swapped
- in below to fully enable trie logic.
-
-#define TRIE_TYPE_IS_SAFE 1
-
-*/
-#define TRIE_TYPE_IS_SAFE (UTF || optype==EXACT)
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- make_trie( pRExC_state,
- startbranch, first, cur, tail, count,
- optype, depth+1 );
- }
- if ( PL_regkind[ OP( noper ) ] == EXACT
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- ){
- count = 1;
- first = cur;
- optype = OP( noper );
- } else {
- count = 0;
- first = NULL;
- optype = 0;
- }
- last = NULL;
- }
- }
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log,
- "%*s- %s (%d) <SCAN FINISHED>\n", (int)depth * 2 + 2,
- "", SvPV_nolen_const( mysv ),REG_NODE_NUM(cur));
-
- });
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- made= make_trie( pRExC_state, startbranch, first, scan, tail, count, optype, depth+1 );
-#ifdef TRIE_STUDY_OPT
- if ( ((made == MADE_EXACT_TRIE &&
- startbranch == first)
- || ( first_non_open == first )) &&
- depth==0 ) {
- flags |= SCF_TRIE_RESTUDY;
- if ( startbranch == first
- && scan == tail )
- {
- RExC_seen &=~REG_TOP_LEVEL_BRANCHES;
- }
- }
-#endif
- }
- }
-
- } /* do trie */
-
- }
- else if ( code == BRANCHJ ) { /* single branch is optimized. */
- scan = NEXTOPER(NEXTOPER(scan));
- } else /* single branch is optimized. */
- scan = NEXTOPER(scan);
- continue;
- } else if (OP(scan) == SUSPEND || OP(scan) == GOSUB || OP(scan) == GOSTART) {
- scan_frame *newframe = NULL;
- I32 paren;
- regnode *start;
- regnode *end;
-
- if (OP(scan) != SUSPEND) {
- /* set the pointer */
- if (OP(scan) == GOSUB) {
- paren = ARG(scan);
- RExC_recurse[ARG2L(scan)] = scan;
- start = RExC_open_parens[paren-1];
- end = RExC_close_parens[paren-1];
- } else {
- paren = 0;
- start = RExC_rxi->program + 1;
- end = RExC_opend;
- }
- if (!recursed) {
- Newxz(recursed, (((RExC_npar)>>3) +1), U8);
- SAVEFREEPV(recursed);
- }
- if (!PAREN_TEST(recursed,paren+1)) {
- PAREN_SET(recursed,paren+1);
- Newx(newframe,1,scan_frame);
- } else {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- } else {
- Newx(newframe,1,scan_frame);
- paren = stopparen;
- start = scan+2;
- end = regnext(scan);
- }
- if (newframe) {
- assert(start);
- assert(end);
- SAVEFREEPV(newframe);
- newframe->next = regnext(scan);
- newframe->last = last;
- newframe->stop = stopparen;
- newframe->prev = frame;
-
- frame = newframe;
- scan = start;
- stopparen = paren;
- last = end;
-
- continue;
- }
- }
- else if (OP(scan) == EXACT) {
- I32 l = STR_LEN(scan);
- UV uc;
- if (UTF) {
- const U8 * const s = (U8*)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- } else {
- uc = *((U8*)STRING(scan));
- }
- min += l;
- if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */
- /* The code below prefers earlier match for fixed
- offset, later match for variable offset. */
- if (data->last_end == -1) { /* Update the start info. */
- data->last_start_min = data->pos_min;
- data->last_start_max = is_inf
- ? I32_MAX : data->pos_min + data->pos_delta;
- }
- sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan));
- if (UTF)
- SvUTF8_on(data->last_found);
- {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += utf8_length((U8*)STRING(scan),
- (U8*)STRING(scan)+STR_LEN(scan));
- }
- data->last_end = data->pos_min + l;
- data->pos_min += l; /* As in the first entry. */
- data->flags &= ~SF_BEFORE_EOL;
- }
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && (!(data->start_class->flags & ANYOF_FOLD)
- || !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- )
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- if (uc < 0x100)
- data->start_class->flags &= ~ANYOF_UNICODE_ALL;
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- /* false positive possible if the class is case-folded */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- else
- data->start_class->flags |= ANYOF_UNICODE_ALL;
- data->start_class->flags &= ~ANYOF_EOS;
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (PL_regkind[OP(scan)] == EXACT) { /* But OP != EXACT! */
- I32 l = STR_LEN(scan);
- UV uc = *((U8*)STRING(scan));
-
- /* Search for fixed substrings supports EXACT only. */
- if (flags & SCF_DO_SUBSTR) {
- assert(data);
- SCAN_COMMIT(pRExC_state, data, minlenp);
- }
- if (UTF) {
- const U8 * const s = (U8 *)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- }
- min += l;
- if (flags & SCF_DO_SUBSTR)
- data->pos_min += l;
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat) {
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- data->start_class->flags |= ANYOF_FOLD;
- if (OP(scan) == EXACTFL)
- data->start_class->flags |= ANYOF_LOCALE;
- }
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- if (data->start_class->flags & ANYOF_FOLD) {
- /* false positive possible if the class is case-folded.
- Assume that the locale settings are the same... */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- }
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (strchr((const char*)PL_varies,OP(scan))) {
- I32 mincount, maxcount, minnext, deltanext, fl = 0;
- I32 f = flags, pos_before = 0;
- regnode * const oscan = scan;
- struct regnode_charclass_class this_class;
- struct regnode_charclass_class *oclass = NULL;
- I32 next_is_eval = 0;
-
- switch (PL_regkind[OP(scan)]) {
- case WHILEM: /* End of (?:...)* . */
- scan = NEXTOPER(scan);
- goto finish;
- case PLUS:
- if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) {
- next = NEXTOPER(scan);
- if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) {
- mincount = 1;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- }
- if (flags & SCF_DO_SUBSTR)
- data->pos_min++;
- min++;
- /* Fall through. */
- case STAR:
- if (flags & SCF_DO_STCLASS) {
- mincount = 0;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- is_inf = is_inf_internal = 1;
- scan = regnext(scan);
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot extend fixed substrings */
- data->longest = &(data->longest_float);
- }
- goto optimize_curly_tail;
- case CURLY:
- if (stopparen>0 && (OP(scan)==CURLYN || OP(scan)==CURLYM)
- && (scan->flags == stopparen))
- {
- mincount = 1;
- maxcount = 1;
- } else {
- mincount = ARG1(scan);
- maxcount = ARG2(scan);
- }
- next = regnext(scan);
- if (OP(scan) == CURLYX) {
- I32 lp = (data ? *(data->last_closep) : 0);
- scan->flags = ((lp <= (I32)U8_MAX) ? (U8)lp : U8_MAX);
- }
- scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- next_is_eval = (OP(scan) == EVAL);
- do_curly:
- if (flags & SCF_DO_SUBSTR) {
- if (mincount == 0) SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot extend fixed substrings */
- pos_before = data->pos_min;
- }
- if (data) {
- fl = data->flags;
- data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL);
- if (is_inf)
- data->flags |= SF_IS_INF;
- }
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- oclass = data->start_class;
- data->start_class = &this_class;
- f |= SCF_DO_STCLASS_AND;
- f &= ~SCF_DO_STCLASS_OR;
- }
- /* These are the cases when once a subexpression
- fails at a particular position, it cannot succeed
- even after backtracking at the enclosing scope.
-
- XXXX what if minimal match and we are at the
- initial run of {n,m}? */
- if ((mincount != maxcount - 1) && (maxcount != REG_INFTY))
- f &= ~SCF_WHILEM_VISITED_POS;
-
- /* This will finish on WHILEM, setting scan, or on NULL: */
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- last, data, stopparen, recursed, NULL,
- (mincount == 0
- ? (f & ~SCF_DO_SUBSTR) : f),depth+1);
-
- if (flags & SCF_DO_STCLASS)
- data->start_class = oclass;
- if (mincount == 0 || minnext == 0) {
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&this_class, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- } else { /* Non-zero len */
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- cl_and(data->start_class, and_withp);
- }
- else if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class, &this_class);
- flags &= ~SCF_DO_STCLASS;
- }
- if (!scan) /* It was not CURLYX, but CURLY. */
- scan = next;
- if ( /* ? quantifier ok, except for (?{ ... }) */
- (next_is_eval || !(mincount == 0 && maxcount == 1))
- && (minnext == 0) && (deltanext == 0)
- && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR))
- && maxcount <= REG_INFTY/3) /* Complement check for big count */
- {
- ckWARNreg(RExC_parse,
- "Quantifier unexpected on zero-length expression");
- }
-
- min += minnext * mincount;
- is_inf_internal |= ((maxcount == REG_INFTY
- && (minnext + deltanext) > 0)
- || deltanext == I32_MAX);
- is_inf |= is_inf_internal;
- delta += (minnext + deltanext) * maxcount - minnext * mincount;
-
- /* Try powerful optimization CURLYX => CURLYN. */
- if ( OP(oscan) == CURLYX && data
- && data->flags & SF_IN_PAR
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext && minnext == 1 ) {
- /* Try to optimize to CURLYN. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS;
- regnode * const nxt1 = nxt;
-#ifdef DEBUGGING
- regnode *nxt2;
-#endif
-
- /* Skip open. */
- nxt = regnext(nxt);
- if (!strchr((const char*)PL_simple,OP(nxt))
- && !(PL_regkind[OP(nxt)] == EXACT
- && STR_LEN(nxt) == 1))
- goto nogo;
-#ifdef DEBUGGING
- nxt2 = nxt;
-#endif
- nxt = regnext(nxt);
- if (OP(nxt) != CLOSE)
- goto nogo;
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt+2; /*close->while*/
- }
- /* Now we know that nxt2 is the only contents: */
- oscan->flags = (U8)ARG(nxt);
- OP(oscan) = CURLYN;
- OP(nxt1) = NOTHING; /* was OPEN. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */
-#endif
- }
- nogo:
-
- /* Try optimization CURLYX => CURLYM. */
- if ( OP(oscan) == CURLYX && data
- && !(data->flags & SF_HAS_PAR)
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext /* atom is fixed width */
- && minnext != 0 /* CURLYM can't handle zero width */
- ) {
- /* XXXX How to optimize if data == 0? */
- /* Optimize to a simpler form. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */
- regnode *nxt2;
-
- OP(oscan) = CURLYM;
- while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/
- && (OP(nxt2) != WHILEM))
- nxt = nxt2;
- OP(nxt2) = SUCCEED; /* Whas WHILEM */
- /* Need to optimize away parenths. */
- if (data->flags & SF_IN_PAR) {
- /* Set the parenth number. */
- regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/
-
- if (OP(nxt) != CLOSE)
- FAIL("Panic opt close");
- oscan->flags = (U8)ARG(nxt);
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt2+1; /*close->NOTHING*/
- }
- OP(nxt1) = OPTIMIZED; /* was OPEN. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */
-#endif
-#if 0
- while ( nxt1 && (OP(nxt1) != WHILEM)) {
- regnode *nnxt = regnext(nxt1);
-
- if (nnxt == nxt) {
- if (reg_off_by_arg[OP(nxt1)])
- ARG_SET(nxt1, nxt2 - nxt1);
- else if (nxt2 - nxt1 < U16_MAX)
- NEXT_OFF(nxt1) = nxt2 - nxt1;
- else
- OP(nxt) = NOTHING; /* Cannot beautify */
- }
- nxt1 = nnxt;
- }
-#endif
- /* Optimize again: */
- study_chunk(pRExC_state, &nxt1, minlenp, &deltanext, nxt,
- NULL, stopparen, recursed, NULL, 0,depth+1);
- }
- else
- oscan->flags = 0;
- }
- else if ((OP(oscan) == CURLYX)
- && (flags & SCF_WHILEM_VISITED_POS)
- /* See the comment on a similar expression above.
- However, this time it not a subexpression
- we care about, but the expression itself. */
- && (maxcount == REG_INFTY)
- && data && ++data->whilem_c < 16) {
- /* This stays as CURLYX, we can put the count/of pair. */
- /* Find WHILEM (as in regexec.c) */
- regnode *nxt = oscan + NEXT_OFF(oscan);
-
- if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */
- nxt += ARG(nxt);
- PREVOPER(nxt)->flags = (U8)(data->whilem_c
- | (RExC_whilem_seen << 4)); /* On WHILEM */
- }
- if (data && fl & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (flags & SCF_DO_SUBSTR) {
- SV *last_str = NULL;
- int counted = mincount != 0;
-
- if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */
-#if defined(SPARC64_GCC_WORKAROUND)
- I32 b = 0;
- STRLEN l = 0;
- const char *s = NULL;
- I32 old = 0;
-
- if (pos_before >= data->last_start_min)
- b = pos_before;
- else
- b = data->last_start_min;
-
- l = 0;
- s = SvPV_const(data->last_found, l);
- old = b - data->last_start_min;
-
-#else
- I32 b = pos_before >= data->last_start_min
- ? pos_before : data->last_start_min;
- STRLEN l;
- const char * const s = SvPV_const(data->last_found, l);
- I32 old = b - data->last_start_min;
-#endif
-
- if (UTF)
- old = utf8_hop((U8*)s, old) - (U8*)s;
-
- l -= old;
- /* Get the added string: */
- last_str = newSVpvn_utf8(s + old, l, UTF);
- if (deltanext == 0 && pos_before == b) {
- /* What was added is a constant string */
- if (mincount > 1) {
- SvGROW(last_str, (mincount * l) + 1);
- repeatcpy(SvPVX(last_str) + l,
- SvPVX_const(last_str), l, mincount - 1);
- SvCUR_set(last_str, SvCUR(last_str) * mincount);
- /* Add additional parts. */
- SvCUR_set(data->last_found,
- SvCUR(data->last_found) - l);
- sv_catsv(data->last_found, last_str);
- {
- SV * sv = data->last_found;
- MAGIC *mg =
- SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += CHR_SVLEN(last_str) - l;
- }
- data->last_end += l * (mincount - 1);
- }
- } else {
- /* start offset must point into the last copy */
- data->last_start_min += minnext * (mincount - 1);
- data->last_start_max += is_inf ? I32_MAX
- : (maxcount - 1) * (minnext + data->pos_delta);
- }
- }
- /* It is counted once already... */
- data->pos_min += minnext * (mincount - counted);
- data->pos_delta += - counted * deltanext +
- (minnext + deltanext) * maxcount - minnext * mincount;
- if (mincount != maxcount) {
- /* Cannot extend fixed substrings found inside
- the group. */
- SCAN_COMMIT(pRExC_state,data,minlenp);
- if (mincount && last_str) {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
-
- if (mg)
- mg->mg_len = -1;
- sv_setsv(sv, last_str);
- data->last_end = data->pos_min;
- data->last_start_min =
- data->pos_min - CHR_SVLEN(last_str);
- data->last_start_max = is_inf
- ? I32_MAX
- : data->pos_min + data->pos_delta
- - CHR_SVLEN(last_str);
- }
- data->longest = &(data->longest_float);
- }
- SvREFCNT_dec(last_str);
- }
- if (data && (fl & SF_HAS_EVAL))
- data->flags |= SF_HAS_EVAL;
- optimize_curly_tail:
- if (OP(oscan) != CURLYX) {
- while (PL_regkind[OP(next = regnext(oscan))] == NOTHING
- && NEXT_OFF(next))
- NEXT_OFF(oscan) += NEXT_OFF(next);
- }
- continue;
- default: /* REF and CLUMP only? */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR)
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- break;
- }
- }
- else if (OP(scan) == LNBREAK) {
- if (flags & SCF_DO_STCLASS) {
- int value = 0;
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
- if (flags & SCF_DO_STCLASS_AND) {
- for (value = 0; value < 256; value++)
- if (!is_VERTWS_cp(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- for (value = 0; value < 256; value++)
- if (is_VERTWS_cp(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- min += 1;
- delta += 1;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += 1;
- data->longest = &(data->longest_float);
- }
-
- }
- else if (OP(scan) == FOLDCHAR) {
- int d = ARG(scan)==0xDF ? 1 : 2;
- flags &= ~SCF_DO_STCLASS;
- min += 1;
- delta += d;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += d;
- data->longest = &(data->longest_float);
- }
- }
- else if (strchr((const char*)PL_simple,OP(scan))) {
- int value = 0;
-
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->pos_min++;
- }
- min++;
- if (flags & SCF_DO_STCLASS) {
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
-
- /* Some of the logic below assumes that switching
- locale on will only add false positives. */
- switch (PL_regkind[OP(scan)]) {
- case SANY:
- default:
- do_default:
- /* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- break;
- case REG_ANY:
- if (OP(scan) == SANY)
- goto do_default;
- if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */
- value = (ANYOF_BITMAP_TEST(data->start_class,'\n')
- || (data->start_class->flags & ANYOF_CLASS));
- cl_anything(pRExC_state, data->start_class);
- }
- if (flags & SCF_DO_STCLASS_AND || !value)
- ANYOF_BITMAP_CLEAR(data->start_class,'\n');
- break;
- case ANYOF:
- if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class,
- (struct regnode_charclass_class*)scan);
- else
- cl_or(pRExC_state, data->start_class,
- (struct regnode_charclass_class*)scan);
- break;
- case ALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case ALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- }
- else {
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- data->start_class->flags |= ANYOF_LOCALE;
- }
- break;
- case NALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- }
- break;
- case SPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- else {
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case SPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- }
- break;
- case NSPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- else {
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NSPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- }
- break;
- case DIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT);
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NDIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT);
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- CASE_SYNST_FNC(VERTWS);
- CASE_SYNST_FNC(HORIZWS);
-
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (PL_regkind[OP(scan)] == EOL && flags & SCF_DO_SUBSTR) {
- data->flags |= (OP(scan) == MEOL
- ? SF_BEFORE_MEOL
- : SF_BEFORE_SEOL);
- }
- else if ( PL_regkind[OP(scan)] == BRANCHJ
- /* Lookbehind, or need to calculate parens/evals/stclass: */
- && (scan->flags || data || (flags & SCF_DO_STCLASS))
- && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) {
- if ( !PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- || OP(scan) == UNLESSM )
- {
- /* Negative Lookahead/lookbehind
- In this case we can't do fixed string optimisation.
- */
-
- I32 deltanext, minnext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
- minnext = study_chunk(pRExC_state, &nscan, minlenp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f, depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (minnext > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)minnext;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (f & SCF_DO_STCLASS_AND) {
- if (flags & SCF_DO_STCLASS_OR) {
- /* OR before, AND after: ideally we would recurse with
- * data_fake to get the AND applied by study of the
- * remainder of the pattern, and then derecurse;
- * *** HACK *** for now just treat as "no information".
- * See [perl #56690].
- */
- cl_init(pRExC_state, data->start_class);
- } else {
- /* AND before and after: combine and continue */
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- }
-#if PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- else {
- /* Positive Lookahead/lookbehind
- In this case we can do fixed string optimisation,
- but we must be careful about it. Note in the case of
- lookbehind the positions will be offset by the minimum
- length of the pattern, something we won't know about
- until after the recurse.
- */
- I32 deltanext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
- /* We use SAVEFREEPV so that when the full compile
- is finished perl will clean up the allocated
- minlens when its all done. This was we don't
- have to worry about freeing them when we know
- they wont be used, which would be a pain.
- */
- I32 *minnextp;
- Newx( minnextp, 1, I32 );
- SAVEFREEPV(minnextp);
-
- if (data) {
- StructCopy(data, &data_fake, scan_data_t);
- if ((flags & SCF_DO_SUBSTR) && data->last_found) {
- f |= SCF_DO_SUBSTR;
- if (scan->flags)
- SCAN_COMMIT(pRExC_state, &data_fake,minlenp);
- data_fake.last_found=newSVsv(data->last_found);
- }
- }
- else
- data_fake.last_closep = &fake;
- data_fake.flags = 0;
- data_fake.pos_delta = delta;
- if (is_inf)
- data_fake.flags |= SF_IS_INF;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
-
- *minnextp = study_chunk(pRExC_state, &nscan, minnextp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f,depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (*minnextp > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)*minnextp;
- }
-
- *minnextp += min;
-
- if (f & SCF_DO_STCLASS_AND) {
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- if ((flags & SCF_DO_SUBSTR) && data_fake.last_found) {
- if (RExC_rx->minlen<*minnextp)
- RExC_rx->minlen=*minnextp;
- SCAN_COMMIT(pRExC_state, &data_fake, minnextp);
- SvREFCNT_dec(data_fake.last_found);
-
- if ( data_fake.minlen_fixed != minlenp )
- {
- data->offset_fixed= data_fake.offset_fixed;
- data->minlen_fixed= data_fake.minlen_fixed;
- data->lookbehind_fixed+= scan->flags;
- }
- if ( data_fake.minlen_float != minlenp )
- {
- data->minlen_float= data_fake.minlen_float;
- data->offset_float_min=data_fake.offset_float_min;
- data->offset_float_max=data_fake.offset_float_max;
- data->lookbehind_float+= scan->flags;
- }
- }
- }
-
-
- }
-#endif
- }
- else if (OP(scan) == OPEN) {
- if (stopparen != (I32)ARG(scan))
- pars++;
- }
- else if (OP(scan) == CLOSE) {
- if (stopparen == (I32)ARG(scan)) {
- break;
- }
- if ((I32)ARG(scan) == is_par) {
- next = regnext(scan);
-
- if ( next && (OP(next) != WHILEM) && next < last)
- is_par = 0; /* Disable optimization */
- }
- if (data)
- *(data->last_closep) = ARG(scan);
- }
- else if (OP(scan) == EVAL) {
- if (data)
- data->flags |= SF_HAS_EVAL;
- }
- else if ( PL_regkind[OP(scan)] == ENDLIKE ) {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- flags &= ~SCF_DO_SUBSTR;
- }
- if (data && OP(scan)==ACCEPT) {
- data->flags |= SCF_SEEN_ACCEPT;
- if (stopmin > min)
- stopmin = min;
- }
- }
- else if (OP(scan) == LOGICAL && scan->flags == 2) /* Embedded follows */
- {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- else if (OP(scan) == GPOS) {
- if (!(RExC_rx->extflags & RXf_GPOS_FLOAT) &&
- !(delta || is_inf || (data && data->pos_delta)))
- {
- if (!(RExC_rx->extflags & RXf_ANCH) && (flags & SCF_DO_SUBSTR))
- RExC_rx->extflags |= RXf_ANCH_GPOS;
- if (RExC_rx->gofs < (U32)min)
- RExC_rx->gofs = min;
- } else {
- RExC_rx->extflags |= RXf_GPOS_FLOAT;
- RExC_rx->gofs = 0;
- }
- }
-#ifdef TRIE_STUDY_OPT
-#ifdef FULL_TRIE_STUDY
- else if (PL_regkind[OP(scan)] == TRIE) {
- /* NOTE - There is similar code to this block above for handling
- BRANCH nodes on the initial study. If you change stuff here
- check there too. */
- regnode *trie_node= scan;
- regnode *tail= regnext(scan);
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- I32 max1 = 0, min1 = I32_MAX;
- struct regnode_charclass_class accum;
-
- if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */
- SCAN_COMMIT(pRExC_state, data,minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- if (!trie->jump) {
- min1= trie->minlen;
- max1= trie->maxlen;
- } else {
- const regnode *nextbranch= NULL;
- U32 word;
-
- for ( word=1 ; word <= trie->wordcount ; word++)
- {
- I32 deltanext=0, minnext=0, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- if (trie->jump[word]) {
- if (!nextbranch)
- nextbranch = trie_node + trie->jump[0];
- scan= trie_node + trie->jump[word];
- /* We go from the jump point to the branch that follows
- it. Note this means we need the vestigal unused branches
- even though they arent otherwise used.
- */
- minnext = study_chunk(pRExC_state, &scan, minlenp,
- &deltanext, (regnode *)nextbranch, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode*)nextbranch);
-
- if (min1 > (I32)(minnext + trie->minlen))
- min1 = minnext + trie->minlen;
- if (max1 < (I32)(minnext + deltanext + trie->maxlen))
- max1 = minnext + deltanext + trie->maxlen;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
-
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > min + min1)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- }
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- scan= tail;
- continue;
- }
-#else
- else if (PL_regkind[OP(scan)] == TRIE) {
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- U8*bang=NULL;
-
- min += trie->minlen;
- delta += (trie->maxlen - trie->minlen);
- flags &= ~SCF_DO_STCLASS; /* xxx */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += trie->minlen;
- data->pos_delta += (trie->maxlen - trie->minlen);
- if (trie->maxlen != trie->minlen)
- data->longest = &(data->longest_float);
- }
- if (trie->jump) /* no more substrings -- for now /grr*/
- flags &= ~SCF_DO_SUBSTR;
- }
-#endif /* old or new */
-#endif /* TRIE_STUDY_OPT */
-
- /* Else: zero-length, ignore. */
- scan = regnext(scan);
- }
- if (frame) {
- last = frame->last;
- scan = frame->next;
- stopparen = frame->stop;
- frame = frame->prev;
- goto fake_study_recurse;
- }
-
- finish:
- assert(!frame);
- DEBUG_STUDYDATA("pre-fin:",data,depth);
-
- *scanp = scan;
- *deltap = is_inf_internal ? I32_MAX : delta;
- if (flags & SCF_DO_SUBSTR && is_inf)
- data->pos_delta = I32_MAX - data->pos_min;
- if (is_par > (I32)U8_MAX)
- is_par = 0;
- if (is_par && pars==1 && data) {
- data->flags |= SF_IN_PAR;
- data->flags &= ~SF_HAS_PAR;
- }
- else if (pars && data) {
- data->flags |= SF_HAS_PAR;
- data->flags &= ~SF_IN_PAR;
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- if (flags & SCF_TRIE_RESTUDY)
- data->flags |= SCF_TRIE_RESTUDY;
-
- DEBUG_STUDYDATA("post-fin:",data,depth);
-
- return min < stopmin ? min : stopmin;
-}
-
-STATIC U32
-S_add_data(RExC_state_t *pRExC_state, U32 n, const char *s)
-{
- U32 count = RExC_rxi->data ? RExC_rxi->data->count : 0;
-
- PERL_ARGS_ASSERT_ADD_DATA;
-
- Renewc(RExC_rxi->data,
- sizeof(*RExC_rxi->data) + sizeof(void*) * (count + n - 1),
- char, struct reg_data);
- if(count)
- Renew(RExC_rxi->data->what, count + n, U8);
- else
- Newx(RExC_rxi->data->what, n, U8);
- RExC_rxi->data->count = count + n;
- Copy(s, RExC_rxi->data->what + count, n, U8);
- return count;
-}
-
-/*XXX: todo make this not included in a non debugging perl */
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_reginitcolors(pTHX)
-{
- dVAR;
- const char * const s = PerlEnv_getenv("PERL_RE_COLORS");
- if (s) {
- char *t = savepv(s);
- int i = 0;
- PL_colors[0] = t;
- while (++i < 6) {
- t = strchr(t, '\t');
- if (t) {
- *t = '\0';
- PL_colors[i] = ++t;
- }
- else
- PL_colors[i] = t = (char *)"";
- }
- } else {
- int i = 0;
- while (i < 6)
- PL_colors[i++] = (char *)"";
- }
- PL_colorset = 1;
-}
-#endif
-
-
-#ifdef TRIE_STUDY_OPT
-#define CHECK_RESTUDY_GOTO \
- if ( \
- (data.flags & SCF_TRIE_RESTUDY) \
- && ! restudied++ \
- ) goto reStudy
-#else
-#define CHECK_RESTUDY_GOTO
-#endif
-
-/*
- - pregcomp - compile a regular expression into internal code
- *
- * We can't allocate space until we know how big the compiled form will be,
- * but we can't compile it (and thus know how big it is) until we've got a
- * place to put the code. So we cheat: we compile it twice, once with code
- * generation turned off and size counting turned on, and once "for real".
- * This also means that we don't allocate space until we are sure that the
- * thing really will compile successfully, and we never have to move the
- * code and thus invalidate pointers into it. (Note that it has to be in
- * one piece because free() must be able to free it all.) [NB: not true in perl]
- *
- * Beware that the optimization-preparation code in here knows about some
- * of the structure of the compiled regexp. [I'll say.]
- */
-
-
-
-#ifndef PERL_IN_XSUB_RE
-#define RE_ENGINE_PTR &PL_core_reg_engine
-#else
-extern const struct regexp_engine my_reg_engine;
-#define RE_ENGINE_PTR &my_reg_engine
-#endif
-
-#ifndef PERL_IN_XSUB_RE
-REGEXP *
-Perl_pregcomp(pTHX_ SV * const pattern, const U32 flags)
-{
- dVAR;
- HV * const table = GvHV(PL_hintgv);
-
- PERL_ARGS_ASSERT_PREGCOMP;
-
- /* Dispatch a request to compile a regexp to correct
- regexp engine. */
- if (table) {
- SV **ptr= hv_fetchs(table, "regcomp", FALSE);
- GET_RE_DEBUG_FLAGS_DECL;
- if (ptr && SvIOK(*ptr) && SvIV(*ptr)) {
- const regexp_engine *eng=INT2PTR(regexp_engine*,SvIV(*ptr));
- DEBUG_COMPILE_r({
- PerlIO_printf(Perl_debug_log, "Using engine %"UVxf"\n",
- SvIV(*ptr));
- });
- return CALLREGCOMP_ENG(eng, pattern, flags);
- }
- }
- return Perl_re_compile(aTHX_ pattern, flags);
-}
-#endif
-
-REGEXP *
-Perl_re_compile(pTHX_ SV * const pattern, U32 pm_flags)
-{
- dVAR;
- REGEXP *rx;
- struct regexp *r;
- register regexp_internal *ri;
- STRLEN plen;
- char *exp = SvPV(pattern, plen);
- char* xend = exp + plen;
- regnode *scan;
- I32 flags;
- I32 minlen = 0;
- I32 sawplus = 0;
- I32 sawopen = 0;
- scan_data_t data;
- RExC_state_t RExC_state;
- RExC_state_t * const pRExC_state = &RExC_state;
-#ifdef TRIE_STUDY_OPT
- int restudied= 0;
- RExC_state_t copyRExC_state;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_COMPILE;
-
- DEBUG_r(if (!PL_colorset) reginitcolors());
-
- RExC_utf8 = RExC_orig_utf8 = SvUTF8(pattern);
-
- DEBUG_COMPILE_r({
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RExC_utf8,
- dsv, exp, plen, 60);
- PerlIO_printf(Perl_debug_log, "%sCompiling REx%s %s\n",
- PL_colors[4],PL_colors[5],s);
- });
-
-redo_first_pass:
- RExC_precomp = exp;
- RExC_flags = pm_flags;
- RExC_sawback = 0;
-
- RExC_seen = 0;
- RExC_seen_zerolen = *exp == '^' ? -1 : 0;
- RExC_seen_evals = 0;
- RExC_extralen = 0;
-
- /* First pass: determine size, legality. */
- RExC_parse = exp;
- RExC_start = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_nestroot = 0;
- RExC_size = 0L;
- RExC_emit = &PL_regdummy;
- RExC_whilem_seen = 0;
- RExC_charnames = NULL;
- RExC_open_parens = NULL;
- RExC_close_parens = NULL;
- RExC_opend = NULL;
- RExC_paren_names = NULL;
-#ifdef DEBUGGING
- RExC_paren_name_list = NULL;
-#endif
- RExC_recurse = NULL;
- RExC_recurse_count = 0;
-
-#if 0 /* REGC() is (currently) a NOP at the first pass.
- * Clever compilers notice this and complain. --jhi */
- REGC((U8)REG_MAGIC, (char*)RExC_emit);
-#endif
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n"));
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- RExC_precomp = NULL;
- return(NULL);
- }
- if (RExC_utf8 && !RExC_orig_utf8) {
- /* It's possible to write a regexp in ascii that represents Unicode
- codepoints outside of the byte range, such as via \x{100}. If we
- detect such a sequence we have to convert the entire pattern to utf8
- and then recompile, as our sizing calculation will have been based
- on 1 byte == 1 character, but we will need to use utf8 to encode
- at least some part of the pattern, and therefore must convert the whole
- thing.
- XXX: somehow figure out how to make this less expensive...
- -- dmq */
- STRLEN len = plen;
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log,
- "UTF8 mismatch! Converting to utf8 for resizing and compile\n"));
- exp = (char*)Perl_bytes_to_utf8(aTHX_ (U8*)exp, &len);
- xend = exp + len;
- RExC_orig_utf8 = RExC_utf8;
- SAVEFREEPV(exp);
- goto redo_first_pass;
- }
- DEBUG_PARSE_r({
- PerlIO_printf(Perl_debug_log,
- "Required size %"IVdf" nodes\n"
- "Starting second pass (creation)\n",
- (IV)RExC_size);
- RExC_lastnum=0;
- RExC_lastparse=NULL;
- });
- /* Small enough for pointer-storage convention?
- If extralen==0, this means that we will not need long jumps. */
- if (RExC_size >= 0x10000L && RExC_extralen)
- RExC_size += RExC_extralen;
- else
- RExC_extralen = 0;
- if (RExC_whilem_seen > 15)
- RExC_whilem_seen = 15;
-
- /* Allocate space and zero-initialize. Note, the two step process
- of zeroing when in debug mode, thus anything assigned has to
- happen after that */
- rx = (REGEXP*) newSV_type(SVt_REGEXP);
- r = (struct regexp*)SvANY(rx);
- Newxc(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode),
- char, regexp_internal);
- if ( r == NULL || ri == NULL )
- FAIL("Regexp out of space");
-#ifdef DEBUGGING
- /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */
- Zero(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode), char);
-#else
- /* bulk initialize base fields with 0. */
- Zero(ri, sizeof(regexp_internal), char);
-#endif
-
- /* non-zero initialization begins here */
- RXi_SET( r, ri );
- r->engine= RE_ENGINE_PTR;
- r->extflags = pm_flags;
- {
- bool has_p = ((r->extflags & RXf_PMf_KEEPCOPY) == RXf_PMf_KEEPCOPY);
- bool has_minus = ((r->extflags & RXf_PMf_STD_PMMOD) != RXf_PMf_STD_PMMOD);
- bool has_runon = ((RExC_seen & REG_SEEN_RUN_ON_COMMENT)==REG_SEEN_RUN_ON_COMMENT);
- U16 reganch = (U16)((r->extflags & RXf_PMf_STD_PMMOD)
- >> RXf_PMf_STD_PMMOD_SHIFT);
- const char *fptr = STD_PAT_MODS; /*"msix"*/
- char *p;
- const STRLEN wraplen = plen + has_minus + has_p + has_runon
- + (sizeof(STD_PAT_MODS) - 1)
- + (sizeof("(?:)") - 1);
-
- p = sv_grow(MUTABLE_SV(rx), wraplen + 1);
- SvCUR_set(rx, wraplen);
- SvPOK_on(rx);
- SvFLAGS(rx) |= SvUTF8(pattern);
- *p++='('; *p++='?';
- if (has_p)
- *p++ = KEEPCOPY_PAT_MOD; /*'p'*/
- {
- char *r = p + (sizeof(STD_PAT_MODS) - 1) + has_minus - 1;
- char *colon = r + 1;
- char ch;
-
- while((ch = *fptr++)) {
- if(reganch & 1)
- *p++ = ch;
- else
- *r-- = ch;
- reganch >>= 1;
- }
- if(has_minus) {
- *r = '-';
- p = colon;
- }
- }
-
- *p++ = ':';
- Copy(RExC_precomp, p, plen, char);
- assert ((RX_WRAPPED(rx) - p) < 16);
- r->pre_prefix = p - RX_WRAPPED(rx);
- p += plen;
- if (has_runon)
- *p++ = '\n';
- *p++ = ')';
- *p = 0;
- }
-
- r->intflags = 0;
- r->nparens = RExC_npar - 1; /* set early to validate backrefs */
-
- if (RExC_seen & REG_SEEN_RECURSE) {
- Newxz(RExC_open_parens, RExC_npar,regnode *);
- SAVEFREEPV(RExC_open_parens);
- Newxz(RExC_close_parens,RExC_npar,regnode *);
- SAVEFREEPV(RExC_close_parens);
- }
-
- /* Useful during FAIL. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- Newxz(ri->u.offsets, 2*RExC_size+1, U32); /* MJD 20001228 */
- DEBUG_OFFSETS_r(PerlIO_printf(Perl_debug_log,
- "%s %"UVuf" bytes for offset annotations.\n",
- ri->u.offsets ? "Got" : "Couldn't get",
- (UV)((2*RExC_size+1) * sizeof(U32))));
-#endif
- SetProgLen(ri,RExC_size);
- RExC_rx_sv = rx;
- RExC_rx = r;
- RExC_rxi = ri;
-
- /* Second pass: emit code. */
- RExC_flags = pm_flags; /* don't let top level (?i) bleed */
- RExC_parse = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_emit_start = ri->program;
- RExC_emit = ri->program;
- RExC_emit_bound = ri->program + RExC_size + 1;
-
- /* Store the count of eval-groups for security checks: */
- RExC_rx->seen_evals = RExC_seen_evals;
- REGC((U8)REG_MAGIC, (char*) RExC_emit++);
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- ReREFCNT_dec(rx);
- return(NULL);
- }
- /* XXXX To minimize changes to RE engine we always allocate
- 3-units-long substrs field. */
- Newx(r->substrs, 1, struct reg_substr_data);
- if (RExC_recurse_count) {
- Newxz(RExC_recurse,RExC_recurse_count,regnode *);
- SAVEFREEPV(RExC_recurse);
- }
-
-reStudy:
- r->minlen = minlen = sawplus = sawopen = 0;
- Zero(r->substrs, 1, struct reg_substr_data);
-
-#ifdef TRIE_STUDY_OPT
- if (!restudied) {
- StructCopy(&zero_scan_data, &data, scan_data_t);
- copyRExC_state = RExC_state;
- } else {
- U32 seen=RExC_seen;
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log,"Restudying\n"));
-
- RExC_state = copyRExC_state;
- if (seen & REG_TOP_LEVEL_BRANCHES)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
- else
- RExC_seen &= ~REG_TOP_LEVEL_BRANCHES;
- if (data.last_found) {
- SvREFCNT_dec(data.longest_fixed);
- SvREFCNT_dec(data.longest_float);
- SvREFCNT_dec(data.last_found);
- }
- StructCopy(&zero_scan_data, &data, scan_data_t);
- }
-#else
- StructCopy(&zero_scan_data, &data, scan_data_t);
-#endif
-
- /* Dig out information for optimizations. */
- r->extflags = RExC_flags; /* was pm_op */
- /*dmq: removed as part of de-PMOP: pm->op_pmflags = RExC_flags; */
-
- if (UTF)
- SvUTF8_on(rx); /* Unicode in it? */
- ri->regstclass = NULL;
- if (RExC_naughty >= 10) /* Probably an expensive pattern. */
- r->intflags |= PREGf_NAUGHTY;
- scan = ri->program + 1; /* First BRANCH. */
-
- /* testing for BRANCH here tells us whether there is "must appear"
- data in the pattern. If there is then we can use it for optimisations */
- if (!(RExC_seen & REG_TOP_LEVEL_BRANCHES)) { /* Only one top-level choice. */
- I32 fake;
- STRLEN longest_float_length, longest_fixed_length;
- struct regnode_charclass_class ch_class; /* pointed to by data */
- int stclass_flag;
- I32 last_close = 0; /* pointed to by data */
- regnode *first= scan;
- regnode *first_next= regnext(first);
-
- /*
- * Skip introductions and multiplicators >= 1
- * so that we can extract the 'meat' of the pattern that must
- * match in the large if() sequence following.
- * NOTE that EXACT is NOT covered here, as it is normally
- * picked up by the optimiser separately.
- *
- * This is unfortunate as the optimiser isnt handling lookahead
- * properly currently.
- *
- */
- while ((OP(first) == OPEN && (sawopen = 1)) ||
- /* An OR of *one* alternative - should not happen now. */
- (OP(first) == BRANCH && OP(first_next) != BRANCH) ||
- /* for now we can't handle lookbehind IFMATCH*/
- (OP(first) == IFMATCH && !first->flags) ||
- (OP(first) == PLUS) ||
- (OP(first) == MINMOD) ||
- /* An {n,m} with n>0 */
- (PL_regkind[OP(first)] == CURLY && ARG1(first) > 0) ||
- (OP(first) == NOTHING && PL_regkind[OP(first_next)] != END ))
- {
- /*
- * the only op that could be a regnode is PLUS, all the rest
- * will be regnode_1 or regnode_2.
- *
- */
- if (OP(first) == PLUS)
- sawplus = 1;
- else
- first += regarglen[OP(first)];
-
- first = NEXTOPER(first);
- first_next= regnext(first);
- }
-
- /* Starting-point info. */
- again:
- DEBUG_PEEP("first:",first,0);
- /* Ignore EXACT as we deal with it later. */
- if (PL_regkind[OP(first)] == EXACT) {
- if (OP(first) == EXACT)
- NOOP; /* Empty, get anchored substr later. */
- else if ((OP(first) == EXACTF || OP(first) == EXACTFL))
- ri->regstclass = first;
- }
-#ifdef TRIE_STCLASS
- else if (PL_regkind[OP(first)] == TRIE &&
- ((reg_trie_data *)ri->data->data[ ARG(first) ])->minlen>0)
- {
- regnode *trie_op;
- /* this can happen only on restudy */
- if ( OP(first) == TRIE ) {
- struct regnode_1 *trieop = (struct regnode_1 *)
- PerlMemShared_calloc(1, sizeof(struct regnode_1));
- StructCopy(first,trieop,struct regnode_1);
- trie_op=(regnode *)trieop;
- } else {
- struct regnode_charclass *trieop = (struct regnode_charclass *)
- PerlMemShared_calloc(1, sizeof(struct regnode_charclass));
- StructCopy(first,trieop,struct regnode_charclass);
- trie_op=(regnode *)trieop;
- }
- OP(trie_op)+=2;
- make_trie_failtable(pRExC_state, (regnode *)first, trie_op, 0);
- ri->regstclass = trie_op;
- }
-#endif
- else if (strchr((const char*)PL_simple,OP(first)))
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOUND ||
- PL_regkind[OP(first)] == NBOUND)
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOL) {
- r->extflags |= (OP(first) == MBOL
- ? RXf_ANCH_MBOL
- : (OP(first) == SBOL
- ? RXf_ANCH_SBOL
- : RXf_ANCH_BOL));
- first = NEXTOPER(first);
- goto again;
- }
- else if (OP(first) == GPOS) {
- r->extflags |= RXf_ANCH_GPOS;
- first = NEXTOPER(first);
- goto again;
- }
- else if ((!sawopen || !RExC_sawback) &&
- (OP(first) == STAR &&
- PL_regkind[OP(NEXTOPER(first))] == REG_ANY) &&
- !(r->extflags & RXf_ANCH) && !(RExC_seen & REG_SEEN_EVAL))
- {
- /* turn .* into ^.* with an implied $*=1 */
- const int type =
- (OP(NEXTOPER(first)) == REG_ANY)
- ? RXf_ANCH_MBOL
- : RXf_ANCH_SBOL;
- r->extflags |= type;
- r->intflags |= PREGf_IMPLICIT;
- first = NEXTOPER(first);
- goto again;
- }
- if (sawplus && (!sawopen || !RExC_sawback)
- && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */
- /* x+ must match at the 1st pos of run of x's */
- r->intflags |= PREGf_SKIP;
-
- /* Scan is after the zeroth branch, first is atomic matcher. */
-#ifdef TRIE_STUDY_OPT
- DEBUG_PARSE_r(
- if (!restudied)
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#else
- DEBUG_PARSE_r(
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#endif
-
-
- /*
- * If there's something expensive in the r.e., find the
- * longest literal string that must appear and make it the
- * regmust. Resolve ties in favor of later strings, since
- * the regstart check works with the beginning of the r.e.
- * and avoiding duplication strengthens checking. Not a
- * strong reason, but sufficient in the absence of others.
- * [Now we resolve ties in favor of the earlier string if
- * it happens that c_offset_min has been invalidated, since the
- * earlier string may buy us something the later one won't.]
- */
-
- data.longest_fixed = newSVpvs("");
- data.longest_float = newSVpvs("");
- data.last_found = newSVpvs("");
- data.longest = &(data.longest_fixed);
- first = scan;
- if (!ri->regstclass) {
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- stclass_flag = SCF_DO_STCLASS_AND;
- } else /* XXXX Check for BOUND? */
- stclass_flag = 0;
- data.last_closep = &last_close;
-
- minlen = study_chunk(pRExC_state, &first, &minlen, &fake, scan + RExC_size, /* Up to end */
- &data, -1, NULL, NULL,
- SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag,0);
-
-
- CHECK_RESTUDY_GOTO;
-
-
- if ( RExC_npar == 1 && data.longest == &(data.longest_fixed)
- && data.last_start_min == 0 && data.last_end > 0
- && !RExC_seen_zerolen
- && !(RExC_seen & REG_SEEN_VERBARG)
- && (!(RExC_seen & REG_SEEN_GPOS) || (r->extflags & RXf_ANCH_GPOS)))
- r->extflags |= RXf_CHECK_ALL;
- scan_commit(pRExC_state, &data,&minlen,0);
- SvREFCNT_dec(data.last_found);
-
- /* Note that code very similar to this but for anchored string
- follows immediately below, changes may need to be made to both.
- Be careful.
- */
- longest_float_length = CHR_SVLEN(data.longest_float);
- if (longest_float_length
- || (data.flags & SF_FL_BEFORE_EOL
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */
- && data.offset_fixed == data.offset_float_min
- && SvCUR(data.longest_fixed) == SvCUR(data.longest_float))
- goto remove_float; /* As in (a)+. */
-
- /* copy the information about the longest float from the reg_scan_data
- over to the program. */
- if (SvUTF8(data.longest_float)) {
- r->float_utf8 = data.longest_float;
- r->float_substr = NULL;
- } else {
- r->float_substr = data.longest_float;
- r->float_utf8 = NULL;
- }
- /* float_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_float ? *(data.minlen_float)
- : (I32)longest_float_length;
- r->float_end_shift = ml - data.offset_float_min
- - longest_float_length + (SvTAIL(data.longest_float) != 0)
- + data.lookbehind_float;
- r->float_min_offset = data.offset_float_min - data.lookbehind_float;
- r->float_max_offset = data.offset_float_max;
- if (data.offset_float_max < I32_MAX) /* Don't offset infinity */
- r->float_max_offset -= data.lookbehind_float;
-
- t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_float, t ? FBMcf_TAIL : 0);
- }
- else {
- remove_float:
- r->float_substr = r->float_utf8 = NULL;
- SvREFCNT_dec(data.longest_float);
- longest_float_length = 0;
- }
-
- /* Note that code very similar to this but for floating string
- is immediately above, changes may need to be made to both.
- Be careful.
- */
- longest_fixed_length = CHR_SVLEN(data.longest_fixed);
- if (longest_fixed_length
- || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- /* copy the information about the longest fixed
- from the reg_scan_data over to the program. */
- if (SvUTF8(data.longest_fixed)) {
- r->anchored_utf8 = data.longest_fixed;
- r->anchored_substr = NULL;
- } else {
- r->anchored_substr = data.longest_fixed;
- r->anchored_utf8 = NULL;
- }
- /* fixed_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_fixed ? *(data.minlen_fixed)
- : (I32)longest_fixed_length;
- r->anchored_end_shift = ml - data.offset_fixed
- - longest_fixed_length + (SvTAIL(data.longest_fixed) != 0)
- + data.lookbehind_fixed;
- r->anchored_offset = data.offset_fixed - data.lookbehind_fixed;
-
- t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_fixed, t ? FBMcf_TAIL : 0);
- }
- else {
- r->anchored_substr = r->anchored_utf8 = NULL;
- SvREFCNT_dec(data.longest_fixed);
- longest_fixed_length = 0;
- }
- if (ri->regstclass
- && (OP(ri->regstclass) == REG_ANY || OP(ri->regstclass) == SANY))
- ri->regstclass = NULL;
- if ((!(r->anchored_substr || r->anchored_utf8) || r->anchored_offset)
- && stclass_flag
- && !(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV *sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
-
- /* A temporary algorithm prefers floated substr to fixed one to dig more info. */
- if (longest_fixed_length > longest_float_length) {
- r->check_end_shift = r->anchored_end_shift;
- r->check_substr = r->anchored_substr;
- r->check_utf8 = r->anchored_utf8;
- r->check_offset_min = r->check_offset_max = r->anchored_offset;
- if (r->extflags & RXf_ANCH_SINGLE)
- r->extflags |= RXf_NOSCAN;
- }
- else {
- r->check_end_shift = r->float_end_shift;
- r->check_substr = r->float_substr;
- r->check_utf8 = r->float_utf8;
- r->check_offset_min = r->float_min_offset;
- r->check_offset_max = r->float_max_offset;
- }
- /* XXXX Currently intuiting is not compatible with ANCH_GPOS.
- This should be changed ASAP! */
- if ((r->check_substr || r->check_utf8) && !(r->extflags & RXf_ANCH_GPOS)) {
- r->extflags |= RXf_USE_INTUIT;
- if (SvTAIL(r->check_substr ? r->check_substr : r->check_utf8))
- r->extflags |= RXf_INTUIT_TAIL;
- }
- /* XXX Unneeded? dmq (shouldn't as this is handled elsewhere)
- if ( (STRLEN)minlen < longest_float_length )
- minlen= longest_float_length;
- if ( (STRLEN)minlen < longest_fixed_length )
- minlen= longest_fixed_length;
- */
- }
- else {
- /* Several toplevels. Best we can is to set minlen. */
- I32 fake;
- struct regnode_charclass_class ch_class;
- I32 last_close = 0;
-
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "\nMulti Top Level\n"));
-
- scan = ri->program + 1;
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- data.last_closep = &last_close;
-
-
- minlen = study_chunk(pRExC_state, &scan, &minlen, &fake, scan + RExC_size,
- &data, -1, NULL, NULL, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS,0);
-
- CHECK_RESTUDY_GOTO;
-
- r->check_substr = r->check_utf8 = r->anchored_substr = r->anchored_utf8
- = r->float_substr = r->float_utf8 = NULL;
- if (!(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV* sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
- }
-
- /* Guard against an embedded (?=) or (?<=) with a longer minlen than
- the "real" pattern. */
- DEBUG_OPTIMISE_r({
- PerlIO_printf(Perl_debug_log,"minlen: %"IVdf" r->minlen:%"IVdf"\n",
- (IV)minlen, (IV)r->minlen);
- });
- r->minlenret = minlen;
- if (r->minlen < minlen)
- r->minlen = minlen;
-
- if (RExC_seen & REG_SEEN_GPOS)
- r->extflags |= RXf_GPOS_SEEN;
- if (RExC_seen & REG_SEEN_LOOKBEHIND)
- r->extflags |= RXf_LOOKBEHIND_SEEN;
- if (RExC_seen & REG_SEEN_EVAL)
- r->extflags |= RXf_EVAL_SEEN;
- if (RExC_seen & REG_SEEN_CANY)
- r->extflags |= RXf_CANY_SEEN;
- if (RExC_seen & REG_SEEN_VERBARG)
- r->intflags |= PREGf_VERBARG_SEEN;
- if (RExC_seen & REG_SEEN_CUTGROUP)
- r->intflags |= PREGf_CUTGROUP_SEEN;
- if (RExC_paren_names)
- RXp_PAREN_NAMES(r) = MUTABLE_HV(SvREFCNT_inc(RExC_paren_names));
- else
- RXp_PAREN_NAMES(r) = NULL;
-
-#ifdef STUPID_PATTERN_CHECKS
- if (RX_PRELEN(rx) == 0)
- r->extflags |= RXf_NULL;
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else if (RX_PRELEN(rx) == 3 && memEQ("\\s+", RX_PRECOMP(rx), 3))
- r->extflags |= RXf_WHITE;
- else if (RX_PRELEN(rx) == 1 && RXp_PRECOMP(rx)[0] == '^')
- r->extflags |= RXf_START_ONLY;
-#else
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else {
- regnode *first = ri->program + 1;
- U8 fop = OP(first);
- U8 nop = OP(NEXTOPER(first));
-
- if (PL_regkind[fop] == NOTHING && nop == END)
- r->extflags |= RXf_NULL;
- else if (PL_regkind[fop] == BOL && nop == END)
- r->extflags |= RXf_START_ONLY;
- else if (fop == PLUS && nop ==SPACE && OP(regnext(first))==END)
- r->extflags |= RXf_WHITE;
- }
-#endif
-#ifdef DEBUGGING
- if (RExC_paren_names) {
- ri->name_list_idx = add_data( pRExC_state, 1, "p" );
- ri->data->data[ri->name_list_idx] = (void*)SvREFCNT_inc(RExC_paren_name_list);
- } else
-#endif
- ri->name_list_idx = 0;
-
- if (RExC_recurse_count) {
- for ( ; RExC_recurse_count ; RExC_recurse_count-- ) {
- const regnode *scan = RExC_recurse[RExC_recurse_count-1];
- ARG2L_SET( scan, RExC_open_parens[ARG(scan)-1] - scan );
- }
- }
- Newxz(r->offs, RExC_npar, regexp_paren_pair);
- /* assume we don't need to swap parens around before we match */
-
- DEBUG_DUMP_r({
- PerlIO_printf(Perl_debug_log,"Final program:\n");
- regdump(r);
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_OFFSETS_r(if (ri->u.offsets) {
- const U32 len = ri->u.offsets[0];
- U32 i;
- GET_RE_DEBUG_FLAGS_DECL;
- PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)ri->u.offsets[0]);
- for (i = 1; i <= len; i++) {
- if (ri->u.offsets[i*2-1] || ri->u.offsets[i*2])
- PerlIO_printf(Perl_debug_log, "%"UVuf":%"UVuf"[%"UVuf"] ",
- (UV)i, (UV)ri->u.offsets[i*2-1], (UV)ri->u.offsets[i*2]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
-#endif
- return rx;
-}
-
-#undef RE_ENGINE_PTR
-
-
-SV*
-Perl_reg_named_buff(pTHX_ REGEXP * const rx, SV * const key, SV * const value,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF;
-
- PERL_UNUSED_ARG(value);
-
- if (flags & RXapif_FETCH) {
- return reg_named_buff_fetch(rx, key, flags);
- } else if (flags & (RXapif_STORE | RXapif_DELETE | RXapif_CLEAR)) {
- Perl_croak(aTHX_ "%s", PL_no_modify);
- return NULL;
- } else if (flags & RXapif_EXISTS) {
- return reg_named_buff_exists(rx, key, flags)
- ? &PL_sv_yes
- : &PL_sv_no;
- } else if (flags & RXapif_REGNAMES) {
- return reg_named_buff_all(rx, flags);
- } else if (flags & (RXapif_SCALAR | RXapif_REGNAMES_COUNT)) {
- return reg_named_buff_scalar(rx, flags);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_iter(pTHX_ REGEXP * const rx, const SV * const lastkey,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ITER;
- PERL_UNUSED_ARG(lastkey);
-
- if (flags & RXapif_FIRSTKEY)
- return reg_named_buff_firstkey(rx, flags);
- else if (flags & RXapif_NEXTKEY)
- return reg_named_buff_nextkey(rx, flags);
- else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_iter", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_fetch(pTHX_ REGEXP * const r, SV * const namesv,
- const U32 flags)
-{
- AV *retarray = NULL;
- SV *ret;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FETCH;
-
- if (flags & RXapif_ALL)
- retarray=newAV();
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HE *he_str = hv_fetch_ent( RXp_PAREN_NAMES(rx), namesv, 0, 0 );
- if (he_str) {
- IV i;
- SV* sv_dat=HeVAL(he_str);
- I32 *nums=(I32*)SvPVX(sv_dat);
- for ( i=0; i<SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->nparens) >= nums[i]
- && rx->offs[nums[i]].start != -1
- && rx->offs[nums[i]].end != -1)
- {
- ret = newSVpvs("");
- CALLREG_NUMBUF_FETCH(r,nums[i],ret);
- if (!retarray)
- return ret;
- } else {
- ret = newSVsv(&PL_sv_undef);
- }
- if (retarray)
- av_push(retarray, ret);
- }
- if (retarray)
- return newRV_noinc(MUTABLE_SV(retarray));
- }
- }
- return NULL;
-}
-
-bool
-Perl_reg_named_buff_exists(pTHX_ REGEXP * const r, SV * const key,
- const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_EXISTS;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & RXapif_ALL) {
- return hv_exists_ent(RXp_PAREN_NAMES(rx), key, 0);
- } else {
- SV *sv = CALLREG_NAMED_BUFF_FETCH(r, key, flags);
- if (sv) {
- SvREFCNT_dec(sv);
- return TRUE;
- } else {
- return FALSE;
- }
- }
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_firstkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FIRSTKEY;
-
- if ( rx && RXp_PAREN_NAMES(rx) ) {
- (void)hv_iterinit(RXp_PAREN_NAMES(rx));
-
- return CALLREG_NAMED_BUFF_NEXTKEY(r, NULL, flags & ~RXapif_FIRSTKEY);
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_nextkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_NEXTKEY;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv = RXp_PAREN_NAMES(rx);
- HE *temphe;
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- return newSVhek(HeKEY_hek(temphe));
- }
- }
- }
- return NULL;
-}
-
-SV*
-Perl_reg_named_buff_scalar(pTHX_ REGEXP * const r, const U32 flags)
-{
- SV *ret;
- AV *av;
- I32 length;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_SCALAR;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & (RXapif_ALL | RXapif_REGNAMES_COUNT)) {
- return newSViv(HvTOTALKEYS(RXp_PAREN_NAMES(rx)));
- } else if (flags & RXapif_ONE) {
- ret = CALLREG_NAMED_BUFF_ALL(r, (flags | RXapif_REGNAMES));
- av = MUTABLE_AV(SvRV(ret));
- length = av_len(av);
- SvREFCNT_dec(ret);
- return newSViv(length + 1);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_scalar", (int)flags);
- return NULL;
- }
- }
- return &PL_sv_undef;
-}
-
-SV*
-Perl_reg_named_buff_all(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- AV *av = newAV();
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ALL;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv= RXp_PAREN_NAMES(rx);
- HE *temphe;
- (void)hv_iterinit(hv);
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- av_push(av, newSVhek(HeKEY_hek(temphe)));
- }
- }
- }
-
- return newRV_noinc(MUTABLE_SV(av));
-}
-
-void
-Perl_reg_numbered_buff_fetch(pTHX_ REGEXP * const r, const I32 paren,
- SV * const sv)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- char *s = NULL;
- I32 i = 0;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_FETCH;
-
- if (!rx->subbeg) {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- else
- if (paren == RX_BUFF_IDX_PREMATCH && rx->offs[0].start != -1) {
- /* $` */
- i = rx->offs[0].start;
- s = rx->subbeg;
- }
- else
- if (paren == RX_BUFF_IDX_POSTMATCH && rx->offs[0].end != -1) {
- /* $' */
- s = rx->subbeg + rx->offs[0].end;
- i = rx->sublen - rx->offs[0].end;
- }
- else
- if ( 0 <= paren && paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- /* $& $1 ... */
- i = t1 - s1;
- s = rx->subbeg + s1;
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- assert(rx->sublen >= (s - rx->subbeg) + i );
- if (i >= 0) {
- const int oldtainted = PL_tainted;
- TAINT_NOT;
- sv_setpvn(sv, s, i);
- PL_tainted = oldtainted;
- if ( (rx->extflags & RXf_CANY_SEEN)
- ? (RXp_MATCH_UTF8(rx)
- && (!i || is_utf8_string((U8*)s, i)))
- : (RXp_MATCH_UTF8(rx)) )
- {
- SvUTF8_on(sv);
- }
- else
- SvUTF8_off(sv);
- if (PL_tainting) {
- if (RXp_MATCH_TAINTED(rx)) {
- if (SvTYPE(sv) >= SVt_PVMG) {
- MAGIC* const mg = SvMAGIC(sv);
- MAGIC* mgt;
- PL_tainted = 1;
- SvMAGIC_set(sv, mg->mg_moremagic);
- SvTAINT(sv);
- if ((mgt = SvMAGIC(sv))) {
- mg->mg_moremagic = mgt;
- SvMAGIC_set(sv, mg);
- }
- } else {
- PL_tainted = 1;
- SvTAINT(sv);
- }
- } else
- SvTAINTED_off(sv);
- }
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
-}
-
-void
-Perl_reg_numbered_buff_store(pTHX_ REGEXP * const rx, const I32 paren,
- SV const * const value)
-{
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_STORE;
-
- PERL_UNUSED_ARG(rx);
- PERL_UNUSED_ARG(paren);
- PERL_UNUSED_ARG(value);
-
- if (!PL_localizing)
- Perl_croak(aTHX_ "%s", PL_no_modify);
-}
-
-I32
-Perl_reg_numbered_buff_length(pTHX_ REGEXP * const r, const SV * const sv,
- const I32 paren)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- I32 i;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_LENGTH;
-
- /* Some of this code was originally in C<Perl_magic_len> in F<mg.c> */
- switch (paren) {
- /* $` / ${^PREMATCH} */
- case RX_BUFF_IDX_PREMATCH:
- if (rx->offs[0].start != -1) {
- i = rx->offs[0].start;
- if (i > 0) {
- s1 = 0;
- t1 = i;
- goto getlen;
- }
- }
- return 0;
- /* $' / ${^POSTMATCH} */
- case RX_BUFF_IDX_POSTMATCH:
- if (rx->offs[0].end != -1) {
- i = rx->sublen - rx->offs[0].end;
- if (i > 0) {
- s1 = rx->offs[0].end;
- t1 = rx->sublen;
- goto getlen;
- }
- }
- return 0;
- /* $& / ${^MATCH}, $1, $2, ... */
- default:
- if (paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- i = t1 - s1;
- goto getlen;
- } else {
- if (ckWARN(WARN_UNINITIALIZED))
- report_uninit((const SV *)sv);
- return 0;
- }
- }
- getlen:
- if (i > 0 && RXp_MATCH_UTF8(rx)) {
- const char * const s = rx->subbeg + s1;
- const U8 *ep;
- STRLEN el;
-
- i = t1 - s1;
- if (is_utf8_string_loclen((U8*)s, i, &ep, &el))
- i = el;
- }
- return i;
-}
-
-SV*
-Perl_reg_qr_package(pTHX_ REGEXP * const rx)
-{
- PERL_ARGS_ASSERT_REG_QR_PACKAGE;
- PERL_UNUSED_ARG(rx);
- if (0)
- return NULL;
- else
- return newSVpvs("Regexp");
-}
-
-/* Scans the name of a named buffer from the pattern.
- * If flags is REG_RSN_RETURN_NULL returns null.
- * If flags is REG_RSN_RETURN_NAME returns an SV* containing the name
- * If flags is REG_RSN_RETURN_DATA returns the data SV* corresponding
- * to the parsed name as looked up in the RExC_paren_names hash.
- * If there is an error throws a vFAIL().. type exception.
- */
-
-#define REG_RSN_RETURN_NULL 0
-#define REG_RSN_RETURN_NAME 1
-#define REG_RSN_RETURN_DATA 2
-
-STATIC SV*
-S_reg_scan_name(pTHX_ RExC_state_t *pRExC_state, U32 flags)
-{
- char *name_start = RExC_parse;
-
- PERL_ARGS_ASSERT_REG_SCAN_NAME;
-
- if (isIDFIRST_lazy_if(RExC_parse, UTF)) {
- /* skip IDFIRST by using do...while */
- if (UTF)
- do {
- RExC_parse += UTF8SKIP(RExC_parse);
- } while (isALNUM_utf8((U8*)RExC_parse));
- else
- do {
- RExC_parse++;
- } while (isALNUM(*RExC_parse));
- }
-
- if ( flags ) {
- SV* sv_name
- = newSVpvn_flags(name_start, (int)(RExC_parse - name_start),
- SVs_TEMP | (UTF ? SVf_UTF8 : 0));
- if ( flags == REG_RSN_RETURN_NAME)
- return sv_name;
- else if (flags==REG_RSN_RETURN_DATA) {
- HE *he_str = NULL;
- SV *sv_dat = NULL;
- if ( ! sv_name ) /* should not happen*/
- Perl_croak(aTHX_ "panic: no svname in reg_scan_name");
- if (RExC_paren_names)
- he_str = hv_fetch_ent( RExC_paren_names, sv_name, 0, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat )
- vFAIL("Reference to nonexistent named group");
- return sv_dat;
- }
- else {
- Perl_croak(aTHX_ "panic: bad flag in reg_scan_name");
- }
- /* NOT REACHED */
- }
- return NULL;
-}
-
-#define DEBUG_PARSE_MSG(funcname) DEBUG_PARSE_r({ \
- int rem=(int)(RExC_end - RExC_parse); \
- int cut; \
- int num; \
- int iscut=0; \
- if (rem>10) { \
- rem=10; \
- iscut=1; \
- } \
- cut=10-rem; \
- if (RExC_lastparse!=RExC_parse) \
- PerlIO_printf(Perl_debug_log," >%.*s%-*s", \
- rem, RExC_parse, \
- cut + 4, \
- iscut ? "..." : "<" \
- ); \
- else \
- PerlIO_printf(Perl_debug_log,"%16s",""); \
- \
- if (SIZE_ONLY) \
- num = RExC_size + 1; \
- else \
- num=REG_NODE_NUM(RExC_emit); \
- if (RExC_lastnum!=num) \
- PerlIO_printf(Perl_debug_log,"|%4d",num); \
- else \
- PerlIO_printf(Perl_debug_log,"|%4s",""); \
- PerlIO_printf(Perl_debug_log,"|%*s%-4s", \
- (int)((depth*2)), "", \
- (funcname) \
- ); \
- RExC_lastnum=num; \
- RExC_lastparse=RExC_parse; \
-})
-
-
-
-#define DEBUG_PARSE(funcname) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,"%4s","\n"); \
-})
-#define DEBUG_PARSE_FMT(funcname,fmt,args) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,fmt "\n",args); \
-})
-/*
- - reg - regular expression, i.e. main body or parenthesized thing
- *
- * Caller must absorb opening parenthesis.
- *
- * Combining parenthesis handling with the base level of regular expression
- * is a trifle forced, but the need to tie the tails of the branches to what
- * follows makes it hard to avoid.
- */
-#define REGTAIL(x,y,z) regtail((x),(y),(z),depth+1)
-#ifdef DEBUGGING
-#define REGTAIL_STUDY(x,y,z) regtail_study((x),(y),(z),depth+1)
-#else
-#define REGTAIL_STUDY(x,y,z) regtail((x),(y),(z),depth+1)
-#endif
-
-STATIC regnode *
-S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth)
- /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */
-{
- dVAR;
- register regnode *ret; /* Will be the head of the group. */
- register regnode *br;
- register regnode *lastbr;
- register regnode *ender = NULL;
- register I32 parno = 0;
- I32 flags;
- U32 oregflags = RExC_flags;
- bool have_branch = 0;
- bool is_open = 0;
- I32 freeze_paren = 0;
- I32 after_freeze = 0;
-
- /* for (?g), (?gc), and (?o) warnings; warning
- about (?c) will warn about (?g) -- japhy */
-
-#define WASTED_O 0x01
-#define WASTED_G 0x02
-#define WASTED_C 0x04
-#define WASTED_GC (0x02|0x04)
- I32 wastedflags = 0x00;
-
- char * parse_start = RExC_parse; /* MJD */
- char * const oregcomp_parse = RExC_parse;
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG;
- DEBUG_PARSE("reg ");
-
- *flagp = 0; /* Tentatively. */
-
-
- /* Make an OPEN node, if parenthesized. */
- if (paren) {
- if ( *RExC_parse == '*') { /* (*VERB:ARG) */
- char *start_verb = RExC_parse;
- STRLEN verb_len = 0;
- char *start_arg = NULL;
- unsigned char op = 0;
- int argok = 1;
- int internal_argval = 0; /* internal_argval is only useful if !argok */
- while ( *RExC_parse && *RExC_parse != ')' ) {
- if ( *RExC_parse == ':' ) {
- start_arg = RExC_parse + 1;
- break;
- }
- RExC_parse++;
- }
- ++start_verb;
- verb_len = RExC_parse - start_verb;
- if ( start_arg ) {
- RExC_parse++;
- while ( *RExC_parse && *RExC_parse != ')' )
- RExC_parse++;
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern argument");
- if ( RExC_parse == start_arg )
- start_arg = NULL;
- } else {
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern");
- }
-
- switch ( *start_verb ) {
- case 'A': /* (*ACCEPT) */
- if ( memEQs(start_verb,verb_len,"ACCEPT") ) {
- op = ACCEPT;
- internal_argval = RExC_nestroot;
- }
- break;
- case 'C': /* (*COMMIT) */
- if ( memEQs(start_verb,verb_len,"COMMIT") )
- op = COMMIT;
- break;
- case 'F': /* (*FAIL) */
- if ( verb_len==1 || memEQs(start_verb,verb_len,"FAIL") ) {
- op = OPFAIL;
- argok = 0;
- }
- break;
- case ':': /* (*:NAME) */
- case 'M': /* (*MARK:NAME) */
- if ( verb_len==0 || memEQs(start_verb,verb_len,"MARK") ) {
- op = MARKPOINT;
- argok = -1;
- }
- break;
- case 'P': /* (*PRUNE) */
- if ( memEQs(start_verb,verb_len,"PRUNE") )
- op = PRUNE;
- break;
- case 'S': /* (*SKIP) */
- if ( memEQs(start_verb,verb_len,"SKIP") )
- op = SKIP;
- break;
- case 'T': /* (*THEN) */
- /* [19:06] <TimToady> :: is then */
- if ( memEQs(start_verb,verb_len,"THEN") ) {
- op = CUTGROUP;
- RExC_seen |= REG_SEEN_CUTGROUP;
- }
- break;
- }
- if ( ! op ) {
- RExC_parse++;
- vFAIL3("Unknown verb pattern '%.*s'",
- verb_len, start_verb);
- }
- if ( argok ) {
- if ( start_arg && internal_argval ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else if ( argok < 0 && !start_arg ) {
- vFAIL3("Verb pattern '%.*s' has a mandatory argument",
- verb_len, start_verb);
- } else {
- ret = reganode(pRExC_state, op, internal_argval);
- if ( ! internal_argval && ! SIZE_ONLY ) {
- if (start_arg) {
- SV *sv = newSVpvn( start_arg, RExC_parse - start_arg);
- ARG(ret) = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[ARG(ret)]=(void*)sv;
- ret->flags = 0;
- } else {
- ret->flags = 1;
- }
- }
- }
- if (!internal_argval)
- RExC_seen |= REG_SEEN_VERBARG;
- } else if ( start_arg ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else {
- ret = reg_node(pRExC_state, op);
- }
- nextchar(pRExC_state);
- return ret;
- } else
- if (*RExC_parse == '?') { /* (?...) */
- bool is_logical = 0;
- const char * const seqstart = RExC_parse;
-
- RExC_parse++;
- paren = *RExC_parse++;
- ret = NULL; /* For look-ahead/behind. */
- switch (paren) {
-
- case 'P': /* (?P...) variants for those used to PCRE/Python */
- paren = *RExC_parse++;
- if ( paren == '<') /* (?P<...>) named capture */
- goto named_capture;
- else if (paren == '>') { /* (?P>name) named recursion */
- goto named_recursion;
- }
- else if (paren == '=') { /* (?P=...) named backref */
- /* this pretty much dupes the code for \k<NAME> in regatom(), if
- you change this make sure you change that */
- char* name_start = RExC_parse;
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ')')
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
-
- nextchar(pRExC_state);
- return ret;
- }
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- case '<': /* (?<...) */
- if (*RExC_parse == '!')
- paren = ',';
- else if (*RExC_parse != '=')
- named_capture:
- { /* (?<...>) */
- char *name_start;
- SV *svname;
- paren= '>';
- case '\'': /* (?'...') */
- name_start= RExC_parse;
- svname = reg_scan_name(pRExC_state,
- SIZE_ONLY ? /* reverse test from the others */
- REG_RSN_RETURN_NAME :
- REG_RSN_RETURN_NULL);
- if (RExC_parse == name_start) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- if (*RExC_parse != paren)
- vFAIL2("Sequence (?%c... not terminated",
- paren=='>' ? '<' : paren);
- if (SIZE_ONLY) {
- HE *he_str;
- SV *sv_dat = NULL;
- if (!svname) /* shouldnt happen */
- Perl_croak(aTHX_
- "panic: reg_scan_name returned NULL");
- if (!RExC_paren_names) {
- RExC_paren_names= newHV();
- sv_2mortal(MUTABLE_SV(RExC_paren_names));
-#ifdef DEBUGGING
- RExC_paren_name_list= newAV();
- sv_2mortal(MUTABLE_SV(RExC_paren_name_list));
-#endif
- }
- he_str = hv_fetch_ent( RExC_paren_names, svname, 1, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat ) {
- /* croak baby croak */
- Perl_croak(aTHX_
- "panic: paren_name hash element allocation failed");
- } else if ( SvPOK(sv_dat) ) {
- /* (?|...) can mean we have dupes so scan to check
- its already been stored. Maybe a flag indicating
- we are inside such a construct would be useful,
- but the arrays are likely to be quite small, so
- for now we punt -- dmq */
- IV count = SvIV(sv_dat);
- I32 *pv = (I32*)SvPVX(sv_dat);
- IV i;
- for ( i = 0 ; i < count ; i++ ) {
- if ( pv[i] == RExC_npar ) {
- count = 0;
- break;
- }
- }
- if ( count ) {
- pv = (I32*)SvGROW(sv_dat, SvCUR(sv_dat) + sizeof(I32)+1);
- SvCUR_set(sv_dat, SvCUR(sv_dat) + sizeof(I32));
- pv[count] = RExC_npar;
- SvIV_set(sv_dat, SvIVX(sv_dat) + 1);
- }
- } else {
- (void)SvUPGRADE(sv_dat,SVt_PVNV);
- sv_setpvn(sv_dat, (char *)&(RExC_npar), sizeof(I32));
- SvIOK_on(sv_dat);
- SvIV_set(sv_dat, 1);
- }
-#ifdef DEBUGGING
- if (!av_store(RExC_paren_name_list, RExC_npar, SvREFCNT_inc(svname)))
- SvREFCNT_dec(svname);
-#endif
-
- /*sv_dump(sv_dat);*/
- }
- nextchar(pRExC_state);
- paren = 1;
- goto capturing_parens;
- }
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- RExC_parse++;
- case '=': /* (?=...) */
- RExC_seen_zerolen++;
- break;
- case '!': /* (?!...) */
- RExC_seen_zerolen++;
- if (*RExC_parse == ')') {
- ret=reg_node(pRExC_state, OPFAIL);
- nextchar(pRExC_state);
- return ret;
- }
- break;
- case '|': /* (?|...) */
- /* branch reset, behave like a (?:...) except that
- buffers in alternations share the same numbers */
- paren = ':';
- after_freeze = freeze_paren = RExC_npar;
- break;
- case ':': /* (?:...) */
- case '>': /* (?>...) */
- break;
- case '$': /* (?$...) */
- case '@': /* (?@...) */
- vFAIL2("Sequence (?%c...) not implemented", (int)paren);
- break;
- case '#': /* (?#...) */
- while (*RExC_parse && *RExC_parse != ')')
- RExC_parse++;
- if (*RExC_parse != ')')
- FAIL("Sequence (?#... not terminated");
- nextchar(pRExC_state);
- *flagp = TRYAGAIN;
- return NULL;
- case '0' : /* (?0) */
- case 'R' : /* (?R) */
- if (*RExC_parse != ')')
- FAIL("Sequence (?R) not terminated");
- ret = reg_node(pRExC_state, GOSTART);
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- /*notreached*/
- { /* named and numeric backreferences */
- I32 num;
- case '&': /* (?&NAME) */
- parse_start = RExC_parse - 1;
- named_recursion:
- {
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- num = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- goto gen_recurse_regop;
- /* NOT REACHED */
- case '+':
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse++;
- vFAIL("Illegal pattern");
- }
- goto parse_recursion;
- /* NOT REACHED*/
- case '-': /* (?-1) */
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse--; /* rewind to let it be handled later */
- goto parse_flags;
- }
- /*FALLTHROUGH */
- case '1': case '2': case '3': case '4': /* (?1) */
- case '5': case '6': case '7': case '8': case '9':
- RExC_parse--;
- parse_recursion:
- num = atoi(RExC_parse);
- parse_start = RExC_parse - 1; /* MJD */
- if (*RExC_parse == '-')
- RExC_parse++;
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (*RExC_parse!=')')
- vFAIL("Expecting close bracket");
-
- gen_recurse_regop:
- if ( paren == '-' ) {
- /*
- Diagram of capture buffer numbering.
- Top line is the normal capture buffer numbers
- Botton line is the negative indexing as from
- the X (the (?-2))
-
- + 1 2 3 4 5 X 6 7
- /(a(x)y)(a(b(c(?-2)d)e)f)(g(h))/
- - 5 4 3 2 1 X x x
-
- */
- num = RExC_npar + num;
- if (num < 1) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- } else if ( paren == '+' ) {
- num = RExC_npar + num - 1;
- }
-
- ret = reganode(pRExC_state, GOSUB, num);
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- ARG2L_SET( ret, RExC_recurse_count++);
- RExC_emit++;
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Recurse #%"UVuf" to %"IVdf"\n", (UV)ARG(ret), (IV)ARG2L(ret)));
- } else {
- RExC_size++;
- }
- RExC_seen |= REG_SEEN_RECURSE;
- Set_Node_Length(ret, 1 + regarglen[OP(ret)]); /* MJD */
- Set_Node_Offset(ret, parse_start); /* MJD */
-
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- } /* named and numeric backreferences */
- /* NOT REACHED */
-
- case '?': /* (??...) */
- is_logical = 1;
- if (*RExC_parse != '{') {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- *flagp |= POSTPONED;
- paren = *RExC_parse++;
- /* FALL THROUGH */
- case '{': /* (?{...}) */
- {
- I32 count = 1;
- U32 n = 0;
- char c;
- char *s = RExC_parse;
-
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_EVAL;
- while (count && (c = *RExC_parse)) {
- if (c == '\\') {
- if (RExC_parse[1])
- RExC_parse++;
- }
- else if (c == '{')
- count++;
- else if (c == '}')
- count--;
- RExC_parse++;
- }
- if (*RExC_parse != ')') {
- RExC_parse = s;
- vFAIL("Sequence (?{...}) not terminated or not {}-balanced");
- }
- if (!SIZE_ONLY) {
- PAD *pad;
- OP_4tree *sop, *rop;
- SV * const sv = newSVpvn(s, RExC_parse - 1 - s);
-
- ENTER;
- Perl_save_re_context(aTHX);
- rop = sv_compile_2op(sv, &sop, "re", &pad);
- sop->op_private |= OPpREFCOUNTED;
- /* re_dup will OpREFCNT_inc */
- OpREFCNT_set(sop, 1);
- LEAVE;
-
- n = add_data(pRExC_state, 3, "nop");
- RExC_rxi->data->data[n] = (void*)rop;
- RExC_rxi->data->data[n+1] = (void*)sop;
- RExC_rxi->data->data[n+2] = (void*)pad;
- SvREFCNT_dec(sv);
- }
- else { /* First pass */
- if (PL_reginterp_cnt < ++RExC_seen_evals
- && IN_PERL_RUNTIME)
- /* No compiled RE interpolated, has runtime
- components ===> unsafe. */
- FAIL("Eval-group not allowed at runtime, use re 'eval'");
- if (PL_tainting && PL_tainted)
- FAIL("Eval-group in insecure regular expression");
-#if PERL_VERSION > 8
- if (IN_PERL_COMPILETIME)
- PL_cv_has_eval = 1;
-#endif
- }
-
- nextchar(pRExC_state);
- if (is_logical) {
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 2;
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, EVAL, n));
- /* deal with the length of this later - MJD */
- return ret;
- }
- ret = reganode(pRExC_state, EVAL, n);
- Set_Node_Length(ret, RExC_parse - parse_start + 1);
- Set_Node_Offset(ret, parse_start);
- return ret;
- }
- case '(': /* (?(?{...})...) and (?(?=...)...) */
- {
- int is_define= 0;
- if (RExC_parse[0] == '?') { /* (?(?...)) */
- if (RExC_parse[1] == '=' || RExC_parse[1] == '!'
- || RExC_parse[1] == '<'
- || RExC_parse[1] == '{') { /* Lookahead or eval. */
- I32 flag;
-
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 1;
- REGTAIL(pRExC_state, ret, reg(pRExC_state, 1, &flag,depth+1));
- goto insert_if;
- }
- }
- else if ( RExC_parse[0] == '<' /* (?(<NAME>)...) */
- || RExC_parse[0] == '\'' ) /* (?('NAME')...) */
- {
- char ch = RExC_parse[0] == '<' ? '>' : '\'';
- char *name_start= RExC_parse++;
- U32 num = 0;
- SV *sv_dat=reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence (?(%c... not terminated",
- (ch == '>' ? '<' : ch));
- RExC_parse++;
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- ret = reganode(pRExC_state,NGROUPP,num);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'D' &&
- RExC_parse[1] == 'E' &&
- RExC_parse[2] == 'F' &&
- RExC_parse[3] == 'I' &&
- RExC_parse[4] == 'N' &&
- RExC_parse[5] == 'E')
- {
- ret = reganode(pRExC_state,DEFINEP,0);
- RExC_parse +=6 ;
- is_define = 1;
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'R') {
- RExC_parse++;
- parno = 0;
- if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- parno = atoi(RExC_parse++);
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- } else if (RExC_parse[0] == '&') {
- SV *sv_dat;
- RExC_parse++;
- sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- parno = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- ret = reganode(pRExC_state,INSUBP,parno);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- /* (?(1)...) */
- char c;
- parno = atoi(RExC_parse++);
-
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- ret = reganode(pRExC_state, GROUPP, parno);
-
- insert_if_check_paren:
- if ((c = *nextchar(pRExC_state)) != ')')
- vFAIL("Switch condition not recognized");
- insert_if:
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0));
- br = regbranch(pRExC_state, &flags, 1,depth+1);
- if (br == NULL)
- br = reganode(pRExC_state, LONGJMP, 0);
- else
- REGTAIL(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0));
- c = *nextchar(pRExC_state);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- if (c == '|') {
- if (is_define)
- vFAIL("(?(DEFINE)....) does not allow branches");
- lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */
- regbranch(pRExC_state, &flags, 1,depth+1);
- REGTAIL(pRExC_state, ret, lastbr);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- c = *nextchar(pRExC_state);
- }
- else
- lastbr = NULL;
- if (c != ')')
- vFAIL("Switch (?(condition)... contains too many branches");
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, br, ender);
- if (lastbr) {
- REGTAIL(pRExC_state, lastbr, ender);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender);
- }
- else
- REGTAIL(pRExC_state, ret, ender);
- RExC_size++; /* XXX WHY do we need this?!!
- For large programs it seems to be required
- but I can't figure out why. -- dmq*/
- return ret;
- }
- else {
- vFAIL2("Unknown switch condition (?(%.2s", RExC_parse);
- }
- }
- case 0:
- RExC_parse--; /* for vFAIL to print correctly */
- vFAIL("Sequence (? incomplete");
- break;
- default:
- --RExC_parse;
- parse_flags: /* (?i) */
- {
- U32 posflags = 0, negflags = 0;
- U32 *flagsp = &posflags;
-
- while (*RExC_parse) {
- /* && strchr("iogcmsx", *RExC_parse) */
- /* (?g), (?gc) and (?o) are useless here
- and must be globally applied -- japhy */
- switch (*RExC_parse) {
- CASE_STD_PMMOD_FLAGS_PARSE_SET(flagsp);
- case ONCE_PAT_MOD: /* 'o' */
- case GLOBAL_PAT_MOD: /* 'g' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- const I32 wflagbit = *RExC_parse == 'o' ? WASTED_O : WASTED_G;
- if (! (wastedflags & wflagbit) ) {
- wastedflags |= wflagbit;
- vWARN5(
- RExC_parse + 1,
- "Useless (%s%c) - %suse /%c modifier",
- flagsp == &negflags ? "?-" : "?",
- *RExC_parse,
- flagsp == &negflags ? "don't " : "",
- *RExC_parse
- );
- }
- }
- break;
-
- case CONTINUE_PAT_MOD: /* 'c' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- if (! (wastedflags & WASTED_C) ) {
- wastedflags |= WASTED_GC;
- vWARN3(
- RExC_parse + 1,
- "Useless (%sc) - %suse /gc modifier",
- flagsp == &negflags ? "?-" : "?",
- flagsp == &negflags ? "don't " : ""
- );
- }
- }
- break;
- case KEEPCOPY_PAT_MOD: /* 'p' */
- if (flagsp == &negflags) {
- if (SIZE_ONLY)
- ckWARNreg(RExC_parse + 1,"Useless use of (?-p)");
- } else {
- *flagsp |= RXf_PMf_KEEPCOPY;
- }
- break;
- case '-':
- if (flagsp == &negflags) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- flagsp = &negflags;
- wastedflags = 0; /* reset so (?g-c) warns twice */
- break;
- case ':':
- paren = ':';
- /*FALLTHROUGH*/
- case ')':
- RExC_flags |= posflags;
- RExC_flags &= ~negflags;
- if (paren != ':') {
- oregflags |= posflags;
- oregflags &= ~negflags;
- }
- nextchar(pRExC_state);
- if (paren != ':') {
- *flagp = TRYAGAIN;
- return NULL;
- } else {
- ret = NULL;
- goto parse_rest;
- }
- /*NOTREACHED*/
- default:
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- ++RExC_parse;
- }
- }} /* one for the default block, one for the switch */
- }
- else { /* (...) */
- capturing_parens:
- parno = RExC_npar;
- RExC_npar++;
-
- ret = reganode(pRExC_state, OPEN, parno);
- if (!SIZE_ONLY ){
- if (!RExC_nestroot)
- RExC_nestroot = parno;
- if (RExC_seen & REG_SEEN_RECURSE
- && !RExC_open_parens[parno-1])
- {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting open paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ret)));
- RExC_open_parens[parno-1]= ret;
- }
- }
- Set_Node_Length(ret, 1); /* MJD */
- Set_Node_Offset(ret, RExC_parse); /* MJD */
- is_open = 1;
- }
- }
- else /* ! paren */
- ret = NULL;
-
- parse_rest:
- /* Pick up the branches, linking them together. */
- parse_start = RExC_parse; /* MJD */
- br = regbranch(pRExC_state, &flags, 1,depth+1);
-
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
-
- /* branch_len = (paren != 0); */
-
- if (br == NULL)
- return(NULL);
- if (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, BRANCHJ, br, depth+1);
- }
- else { /* MJD */
- reginsert(pRExC_state, BRANCH, br, depth+1);
- Set_Node_Length(br, paren != 0);
- Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start);
- }
- have_branch = 1;
- if (SIZE_ONLY)
- RExC_extralen += 1; /* For BRANCHJ-BRANCH. */
- }
- else if (paren == ':') {
- *flagp |= flags&SIMPLE;
- }
- if (is_open) { /* Starts with OPEN. */
- REGTAIL(pRExC_state, ret, br); /* OPEN -> first. */
- }
- else if (paren != '?') /* Not Conditional */
- ret = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- lastbr = br;
- while (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- ender = reganode(pRExC_state, LONGJMP,0);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */
- }
- if (SIZE_ONLY)
- RExC_extralen += 2; /* Account for LONGJMP. */
- nextchar(pRExC_state);
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
- br = regbranch(pRExC_state, &flags, 0, depth+1);
-
- if (br == NULL)
- return(NULL);
- REGTAIL(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */
- lastbr = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- }
-
- if (have_branch || paren != ':') {
- /* Make a closing node, and hook it on the end. */
- switch (paren) {
- case ':':
- ender = reg_node(pRExC_state, TAIL);
- break;
- case 1:
- ender = reganode(pRExC_state, CLOSE, parno);
- if (!SIZE_ONLY && RExC_seen & REG_SEEN_RECURSE) {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting close paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ender)));
- RExC_close_parens[parno-1]= ender;
- if (RExC_nestroot == parno)
- RExC_nestroot = 0;
- }
- Set_Node_Offset(ender,RExC_parse+1); /* MJD */
- Set_Node_Length(ender,1); /* MJD */
- break;
- case '<':
- case ',':
- case '=':
- case '!':
- *flagp &= ~HASWIDTH;
- /* FALL THROUGH */
- case '>':
- ender = reg_node(pRExC_state, SUCCEED);
- break;
- case 0:
- ender = reg_node(pRExC_state, END);
- if (!SIZE_ONLY) {
- assert(!RExC_opend); /* there can only be one! */
- RExC_opend = ender;
- }
- break;
- }
- REGTAIL(pRExC_state, lastbr, ender);
-
- if (have_branch && !SIZE_ONLY) {
- if (depth==1)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
-
- /* Hook the tails of the branches to the closing node. */
- for (br = ret; br; br = regnext(br)) {
- const U8 op = PL_regkind[OP(br)];
- if (op == BRANCH) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(br), ender);
- }
- else if (op == BRANCHJ) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(NEXTOPER(br)), ender);
- }
- }
- }
- }
-
- {
- const char *p;
- static const char parens[] = "=!<,>";
-
- if (paren && (p = strchr(parens, paren))) {
- U8 node = ((p - parens) % 2) ? UNLESSM : IFMATCH;
- int flag = (p - parens) > 1;
-
- if (paren == '>')
- node = SUSPEND, flag = 0;
- reginsert(pRExC_state, node,ret, depth+1);
- Set_Node_Cur_Length(ret);
- Set_Node_Offset(ret, parse_start + 1);
- ret->flags = flag;
- REGTAIL_STUDY(pRExC_state, ret, reg_node(pRExC_state, TAIL));
- }
- }
-
- /* Check for proper termination. */
- if (paren) {
- RExC_flags = oregflags;
- if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched (");
- }
- }
- else if (!paren && RExC_parse < RExC_end) {
- if (*RExC_parse == ')') {
- RExC_parse++;
- vFAIL("Unmatched )");
- }
- else
- FAIL("Junk on end of regexp"); /* "Can't happen". */
- /* NOTREACHED */
- }
- if (after_freeze)
- RExC_npar = after_freeze;
- return(ret);
-}
-
-/*
- - regbranch - one alternative of an | operator
- *
- * Implements the concatenation operator.
- */
-STATIC regnode *
-S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register regnode *chain = NULL;
- register regnode *latest;
- I32 flags = 0, c = 0;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGBRANCH;
-
- DEBUG_PARSE("brnc");
-
- if (first)
- ret = NULL;
- else {
- if (!SIZE_ONLY && RExC_extralen)
- ret = reganode(pRExC_state, BRANCHJ,0);
- else {
- ret = reg_node(pRExC_state, BRANCH);
- Set_Node_Length(ret, 1);
- }
- }
-
- if (!first && SIZE_ONLY)
- RExC_extralen += 1; /* BRANCHJ */
-
- *flagp = WORST; /* Tentatively. */
-
- RExC_parse--;
- nextchar(pRExC_state);
- while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') {
- flags &= ~TRYAGAIN;
- latest = regpiece(pRExC_state, &flags,depth+1);
- if (latest == NULL) {
- if (flags & TRYAGAIN)
- continue;
- return(NULL);
- }
- else if (ret == NULL)
- ret = latest;
- *flagp |= flags&(HASWIDTH|POSTPONED);
- if (chain == NULL) /* First piece. */
- *flagp |= flags&SPSTART;
- else {
- RExC_naughty++;
- REGTAIL(pRExC_state, chain, latest);
- }
- chain = latest;
- c++;
- }
- if (chain == NULL) { /* Loop ran zero times. */
- chain = reg_node(pRExC_state, NOTHING);
- if (ret == NULL)
- ret = chain;
- }
- if (c == 1) {
- *flagp |= flags&SIMPLE;
- }
-
- return ret;
-}
-
-/*
- - regpiece - something followed by possible [*+?]
- *
- * Note that the branching code sequences used for ? and the general cases
- * of * and + are somewhat optimized: they use the same NOTHING node as
- * both the endmarker for their branch list and the body of the last branch.
- * It might seem that this node could be dispensed with entirely, but the
- * endmarker role is not redundant.
- */
-STATIC regnode *
-S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register char op;
- register char *next;
- I32 flags;
- const char * const origparse = RExC_parse;
- I32 min;
- I32 max = REG_INFTY;
- char *parse_start;
- const char *maxpos = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPIECE;
-
- DEBUG_PARSE("piec");
-
- ret = regatom(pRExC_state, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN)
- *flagp |= TRYAGAIN;
- return(NULL);
- }
-
- op = *RExC_parse;
-
- if (op == '{' && regcurly(RExC_parse)) {
- maxpos = NULL;
- parse_start = RExC_parse; /* MJD */
- next = RExC_parse + 1;
- while (isDIGIT(*next) || *next == ',') {
- if (*next == ',') {
- if (maxpos)
- break;
- else
- maxpos = next;
- }
- next++;
- }
- if (*next == '}') { /* got one */
- if (!maxpos)
- maxpos = next;
- RExC_parse++;
- min = atoi(RExC_parse);
- if (*maxpos == ',')
- maxpos++;
- else
- maxpos = RExC_parse;
- max = atoi(maxpos);
- if (!max && *maxpos != '0')
- max = REG_INFTY; /* meaning "infinity" */
- else if (max >= REG_INFTY)
- vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1);
- RExC_parse = next;
- nextchar(pRExC_state);
-
- do_curly:
- if ((flags&SIMPLE)) {
- RExC_naughty += 2 + RExC_naughty / 2;
- reginsert(pRExC_state, CURLY, ret, depth+1);
- Set_Node_Offset(ret, parse_start+1); /* MJD */
- Set_Node_Cur_Length(ret);
- }
- else {
- regnode * const w = reg_node(pRExC_state, WHILEM);
-
- w->flags = 0;
- REGTAIL(pRExC_state, ret, w);
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, LONGJMP,ret, depth+1);
- reginsert(pRExC_state, NOTHING,ret, depth+1);
- NEXT_OFF(ret) = 3; /* Go over LONGJMP. */
- }
- reginsert(pRExC_state, CURLYX,ret, depth+1);
- /* MJD hk */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Length(ret,
- op == '{' ? (RExC_parse - parse_start) : 1);
-
- if (!SIZE_ONLY && RExC_extralen)
- NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */
- REGTAIL(pRExC_state, ret, reg_node(pRExC_state, NOTHING));
- if (SIZE_ONLY)
- RExC_whilem_seen++, RExC_extralen += 3;
- RExC_naughty += 4 + RExC_naughty; /* compound interest */
- }
- ret->flags = 0;
-
- if (min > 0)
- *flagp = WORST;
- if (max > 0)
- *flagp |= HASWIDTH;
- if (max < min)
- vFAIL("Can't do {n,m} with n > m");
- if (!SIZE_ONLY) {
- ARG1_SET(ret, (U16)min);
- ARG2_SET(ret, (U16)max);
- }
-
- goto nest_check;
- }
- }
-
- if (!ISMULT1(op)) {
- *flagp = flags;
- return(ret);
- }
-
-#if 0 /* Now runtime fix should be reliable. */
-
- /* if this is reinstated, don't forget to put this back into perldiag:
-
- =item Regexp *+ operand could be empty at {#} in regex m/%s/
-
- (F) The part of the regexp subject to either the * or + quantifier
- could match an empty string. The {#} shows in the regular
- expression about where the problem was discovered.
-
- */
-
- if (!(flags&HASWIDTH) && op != '?')
- vFAIL("Regexp *+ operand could be empty");
-#endif
-
- parse_start = RExC_parse;
- nextchar(pRExC_state);
-
- *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH);
-
- if (op == '*' && (flags&SIMPLE)) {
- reginsert(pRExC_state, STAR, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 4;
- }
- else if (op == '*') {
- min = 0;
- goto do_curly;
- }
- else if (op == '+' && (flags&SIMPLE)) {
- reginsert(pRExC_state, PLUS, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 3;
- }
- else if (op == '+') {
- min = 1;
- goto do_curly;
- }
- else if (op == '?') {
- min = 0; max = 1;
- goto do_curly;
- }
- nest_check:
- if (!SIZE_ONLY && !(flags&(HASWIDTH|POSTPONED)) && max > REG_INFTY/3) {
- ckWARN3reg(RExC_parse,
- "%.*s matches null string many times",
- (int)(RExC_parse >= origparse ? RExC_parse - origparse : 0),
- origparse);
- }
-
- if (RExC_parse < RExC_end && *RExC_parse == '?') {
- nextchar(pRExC_state);
- reginsert(pRExC_state, MINMOD, ret, depth+1);
- REGTAIL(pRExC_state, ret, ret + NODE_STEP_REGNODE);
- }
-#ifndef REG_ALLOW_MINMOD_SUSPEND
- else
-#endif
- if (RExC_parse < RExC_end && *RExC_parse == '+') {
- regnode *ender;
- nextchar(pRExC_state);
- ender = reg_node(pRExC_state, SUCCEED);
- REGTAIL(pRExC_state, ret, ender);
- reginsert(pRExC_state, SUSPEND, ret, depth+1);
- ret->flags = 0;
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, ret, ender);
- /*ret= ender;*/
- }
-
- if (RExC_parse < RExC_end && ISMULT2(RExC_parse)) {
- RExC_parse++;
- vFAIL("Nested quantifiers");
- }
-
- return(ret);
-}
-
-
-/* reg_namedseq(pRExC_state,UVp)
-
- This is expected to be called by a parser routine that has
- recognized '\N' and needs to handle the rest. RExC_parse is
- expected to point at the first char following the N at the time
- of the call.
-
- If valuep is non-null then it is assumed that we are parsing inside
- of a charclass definition and the first codepoint in the resolved
- string is returned via *valuep and the routine will return NULL.
- In this mode if a multichar string is returned from the charnames
- handler a warning will be issued, and only the first char in the
- sequence will be examined. If the string returned is zero length
- then the value of *valuep is undefined and NON-NULL will
- be returned to indicate failure. (This will NOT be a valid pointer
- to a regnode.)
-
- If valuep is null then it is assumed that we are parsing normal text
- and inserts a new EXACT node into the program containing the resolved
- string and returns a pointer to the new node. If the string is
- zerolength a NOTHING node is emitted.
-
- On success RExC_parse is set to the char following the endbrace.
- Parsing failures will generate a fatal errorvia vFAIL(...)
-
- NOTE: We cache all results from the charnames handler locally in
- the RExC_charnames hash (created on first use) to prevent a charnames
- handler from playing silly-buggers and returning a short string and
- then a long string for a given pattern. Since the regexp program
- size is calculated during an initial parse this would result
- in a buffer overrun so we cache to prevent the charname result from
- changing during the course of the parse.
-
- */
-STATIC regnode *
-S_reg_namedseq(pTHX_ RExC_state_t *pRExC_state, UV *valuep, I32 *flagp)
-{
- char * name; /* start of the content of the name */
- char * endbrace; /* endbrace following the name */
- SV *sv_str = NULL;
- SV *sv_name = NULL;
- STRLEN len; /* this has various purposes throughout the code */
- bool cached = 0; /* if this is true then we shouldn't refcount dev sv_str */
- regnode *ret = NULL;
-
- PERL_ARGS_ASSERT_REG_NAMEDSEQ;
-
- if (*RExC_parse != '{' ||
- (*RExC_parse == '{' && RExC_parse[1]
- && strchr("0123456789", RExC_parse[1])))
- {
- GET_RE_DEBUG_FLAGS_DECL;
- if (valuep)
- /* no bare \N in a charclass */
- vFAIL("Missing braces on \\N{}");
- GET_RE_DEBUG_FLAGS;
- nextchar(pRExC_state);
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- RExC_parse--;
- Set_Node_Length(ret, 1); /* MJD */
- return ret;
- }
- name = RExC_parse+1;
- endbrace = strchr(RExC_parse, '}');
- if ( ! endbrace ) {
- RExC_parse++;
- vFAIL("Missing right brace on \\N{}");
- }
- RExC_parse = endbrace + 1;
-
-
- /* RExC_parse points at the beginning brace,
- endbrace points at the last */
- if ( name[0]=='U' && name[1]=='+' ) {
- /* its a "Unicode hex" notation {U+89AB} */
- I32 fl = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX
- | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0);
- UV cp;
- len = (STRLEN)(endbrace - name - 2);
- cp = grok_hex(name + 2, &len, &fl, NULL);
- if ( len != (STRLEN)(endbrace - name - 2) ) {
- cp = 0xFFFD;
- }
- if ( valuep ) {
- if (cp > 0xff) RExC_utf8 = 1;
- *valuep = cp;
- return NULL;
- }
-
- /* Need to convert to utf8 if either: won't fit into a byte, or the re
- * is going to be in utf8 and the representation changes under utf8. */
- if (cp > 0xff || (RExC_utf8 && ! UNI_IS_INVARIANT(cp))) {
- U8 string[UTF8_MAXBYTES+1];
- U8 *tmps;
- RExC_utf8 = 1;
- tmps = uvuni_to_utf8(string, cp);
- sv_str = newSVpvn_utf8((char*)string, tmps - string, TRUE);
- } else { /* Otherwise, no need for utf8, can skip that step */
- char string;
- string = (char)cp;
- sv_str= newSVpvn(&string, 1);
- }
- } else {
- /* fetch the charnames handler for this scope */
- HV * const table = GvHV(PL_hintgv);
- SV **cvp= table ?
- hv_fetchs(table, "charnames", FALSE) :
- NULL;
- SV *cv= cvp ? *cvp : NULL;
- HE *he_str;
- int count;
- /* create an SV with the name as argument */
- sv_name = newSVpvn(name, endbrace - name);
-
- if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
- vFAIL2("Constant(\\N{%" SVf "}) unknown: "
- "(possibly a missing \"use charnames ...\")",
- SVfARG(sv_name));
- }
- if (!cvp || !SvOK(*cvp)) { /* when $^H{charnames} = undef; */
- vFAIL2("Constant(\\N{%" SVf "}): "
- "$^H{charnames} is not defined", SVfARG(sv_name));
- }
-
-
-
- if (!RExC_charnames) {
- /* make sure our cache is allocated */
- RExC_charnames = newHV();
- sv_2mortal(MUTABLE_SV(RExC_charnames));
- }
- /* see if we have looked this one up before */
- he_str = hv_fetch_ent( RExC_charnames, sv_name, 0, 0 );
- if ( he_str ) {
- sv_str = HeVAL(he_str);
- cached = 1;
- } else {
- dSP ;
-
- ENTER ;
- SAVETMPS ;
- PUSHMARK(SP) ;
-
- XPUSHs(sv_name);
-
- PUTBACK ;
-
- count= call_sv(cv, G_SCALAR);
-
- if (count == 1) { /* XXXX is this right? dmq */
- sv_str = POPs;
- SvREFCNT_inc_simple_void(sv_str);
- }
-
- SPAGAIN ;
- PUTBACK ;
- FREETMPS ;
- LEAVE ;
-
- if ( !sv_str || !SvOK(sv_str) ) {
- vFAIL2("Constant(\\N{%" SVf "}): Call to &{$^H{charnames}} "
- "did not return a defined value", SVfARG(sv_name));
- }
- if (hv_store_ent( RExC_charnames, sv_name, sv_str, 0))
- cached = 1;
- }
- }
- if (valuep) {
- char *p = SvPV(sv_str, len);
- if (len) {
- STRLEN numlen = 1;
- if ( SvUTF8(sv_str) ) {
- *valuep = utf8_to_uvchr((U8*)p, &numlen);
- if (*valuep > 0x7F)
- RExC_utf8 = 1;
- /* XXXX
- We have to turn on utf8 for high bit chars otherwise
- we get failures with
-
- "ss" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
- "SS" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
-
- This is different from what \x{} would do with the same
- codepoint, where the condition is > 0xFF.
- - dmq
- */
-
-
- } else {
- *valuep = (UV)*p;
- /* warn if we havent used the whole string? */
- }
- if (numlen<len && SIZE_ONLY) {
- ckWARN2reg(RExC_parse,
- "Ignoring excess chars from \\N{%" SVf "} in character class",
- SVfARG(sv_name)
- );
- }
- } else if (SIZE_ONLY) {
- ckWARN2reg(RExC_parse,
- "Ignoring zero length \\N{%" SVf "} in character class",
- SVfARG(sv_name)
- );
- }
- SvREFCNT_dec(sv_name);
- if (!cached)
- SvREFCNT_dec(sv_str);
- return len ? NULL : (regnode *)&len;
- } else if(SvCUR(sv_str)) {
-
- char *s;
- char *p, *pend;
- STRLEN charlen = 1;
-#ifdef DEBUGGING
- char * parse_start = name-3; /* needed for the offsets */
-#endif
- GET_RE_DEBUG_FLAGS_DECL; /* needed for the offsets */
-
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s= STRING(ret);
-
- if ( RExC_utf8 && !SvUTF8(sv_str) ) {
- sv_utf8_upgrade(sv_str);
- } else if ( !RExC_utf8 && SvUTF8(sv_str) ) {
- RExC_utf8= 1;
- }
-
- p = SvPV(sv_str, len);
- pend = p + len;
- /* len is the length written, charlen is the size the char read */
- for ( len = 0; p < pend; p += charlen ) {
- if (UTF) {
- UV uvc = utf8_to_uvchr((U8*)p, &charlen);
- if (FOLD) {
- STRLEN foldlen,numlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
- uvc = toFOLD_uni(uvc, tmpbuf, &foldlen);
- /* Emit all the Unicode characters. */
-
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen)
- {
- uvc = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- } else {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- } else {
- len++;
- REGC(*p, s++);
- }
- }
- if (SIZE_ONLY) {
- RExC_size += STR_SZ(len);
- } else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- } else { /* zero length */
- ret = reg_node(pRExC_state,NOTHING);
- }
- SvREFCNT_dec(sv_name);
- if (!cached)
- SvREFCNT_dec(sv_str);
- return ret;
-
-}
-
-
-/*
- * reg_recode
- *
- * It returns the code point in utf8 for the value in *encp.
- * value: a code value in the source encoding
- * encp: a pointer to an Encode object
- *
- * If the result from Encode is not a single character,
- * it returns U+FFFD (Replacement character) and sets *encp to NULL.
- */
-STATIC UV
-S_reg_recode(pTHX_ const char value, SV **encp)
-{
- STRLEN numlen = 1;
- SV * const sv = newSVpvn_flags(&value, numlen, SVs_TEMP);
- const char * const s = *encp ? sv_recode_to_utf8(sv, *encp) : SvPVX(sv);
- const STRLEN newlen = SvCUR(sv);
- UV uv = UNICODE_REPLACEMENT;
-
- PERL_ARGS_ASSERT_REG_RECODE;
-
- if (newlen)
- uv = SvUTF8(sv)
- ? utf8n_to_uvchr((U8*)s, newlen, &numlen, UTF8_ALLOW_DEFAULT)
- : *(U8*)s;
-
- if (!newlen || numlen != newlen) {
- uv = UNICODE_REPLACEMENT;
- *encp = NULL;
- }
- return uv;
-}
-
-
-/*
- - regatom - the lowest level
-
- Try to identify anything special at the start of the pattern. If there
- is, then handle it as required. This may involve generating a single regop,
- such as for an assertion; or it may involve recursing, such as to
- handle a () structure.
-
- If the string doesn't start with something special then we gobble up
- as much literal text as we can.
-
- Once we have been able to handle whatever type of thing started the
- sequence, we return.
-
- Note: we have to be careful with escapes, as they can be both literal
- and special, and in the case of \10 and friends can either, depending
- on context. Specifically there are two seperate switches for handling
- escape sequences, with the one for handling literal escapes requiring
- a dummy entry for all of the special escapes that are actually handled
- by the other.
-*/
-
-STATIC regnode *
-S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret = NULL;
- I32 flags;
- char *parse_start = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_PARSE("atom");
- *flagp = WORST; /* Tentatively. */
-
- PERL_ARGS_ASSERT_REGATOM;
-
-tryagain:
- switch ((U8)*RExC_parse) {
- case '^':
- RExC_seen_zerolen++;
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MBOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SBOL);
- else
- ret = reg_node(pRExC_state, BOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '$':
- nextchar(pRExC_state);
- if (*RExC_parse)
- RExC_seen_zerolen++;
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MEOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SEOL);
- else
- ret = reg_node(pRExC_state, EOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '.':
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SANY);
- else
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '[':
- {
- char * const oregcomp_parse = ++RExC_parse;
- ret = regclass(pRExC_state,depth+1);
- if (*RExC_parse != ']') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched [");
- }
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */
- break;
- }
- case '(':
- nextchar(pRExC_state);
- ret = reg(pRExC_state, 1, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN) {
- if (RExC_parse == RExC_end) {
- /* Make parent create an empty node if needed. */
- *flagp |= TRYAGAIN;
- return(NULL);
- }
- goto tryagain;
- }
- return(NULL);
- }
- *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE|POSTPONED);
- break;
- case '|':
- case ')':
- if (flags & TRYAGAIN) {
- *flagp |= TRYAGAIN;
- return NULL;
- }
- vFAIL("Internal urp");
- /* Supposed to be caught earlier. */
- break;
- case '{':
- if (!regcurly(RExC_parse)) {
- RExC_parse++;
- goto defchar;
- }
- /* FALL THROUGH */
- case '?':
- case '+':
- case '*':
- RExC_parse++;
- vFAIL("Quantifier follows nothing");
- break;
- case 0xDF:
- case 0xC3:
- case 0xCE:
- do_foldchar:
- if (!LOC && FOLD) {
- U32 len,cp;
- len=0; /* silence a spurious compiler warning */
- if ((cp = what_len_TRICKYFOLD_safe(RExC_parse,RExC_end,UTF,len))) {
- *flagp |= HASWIDTH; /* could be SIMPLE too, but needs a handler in regexec.regrepeat */
- RExC_parse+=len-1; /* we get one from nextchar() as well. :-( */
- ret = reganode(pRExC_state, FOLDCHAR, cp);
- Set_Node_Length(ret, 1); /* MJD */
- nextchar(pRExC_state); /* kill whitespace under /x */
- return ret;
- }
- }
- goto outer_default;
- case '\\':
- /* Special Escapes
-
- This switch handles escape sequences that resolve to some kind
- of special regop and not to literal text. Escape sequnces that
- resolve to literal text are handled below in the switch marked
- "Literal Escapes".
-
- Every entry in this switch *must* have a corresponding entry
- in the literal escape switch. However, the opposite is not
- required, as the default for this switch is to jump to the
- literal text handling code.
- */
- switch ((U8)*++RExC_parse) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- goto do_foldchar;
- /* Special Escapes */
- case 'A':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, SBOL);
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'G':
- ret = reg_node(pRExC_state, GPOS);
- RExC_seen |= REG_SEEN_GPOS;
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'K':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, KEEPS);
- *flagp |= SIMPLE;
- /* XXX:dmq : disabling in-place substitution seems to
- * be necessary here to avoid cases of memory corruption, as
- * with: C<$_="x" x 80; s/x\K/y/> -- rgs
- */
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- goto finish_meta_pat;
- case 'Z':
- ret = reg_node(pRExC_state, SEOL);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'z':
- ret = reg_node(pRExC_state, EOS);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'C':
- ret = reg_node(pRExC_state, CANY);
- RExC_seen |= REG_SEEN_CANY;
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'X':
- ret = reg_node(pRExC_state, CLUMP);
- *flagp |= HASWIDTH;
- goto finish_meta_pat;
- case 'w':
- ret = reg_node(pRExC_state, (U8)(LOC ? ALNUML : ALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'W':
- ret = reg_node(pRExC_state, (U8)(LOC ? NALNUML : NALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'b':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? BOUNDL : BOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'B':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? NBOUNDL : NBOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 's':
- ret = reg_node(pRExC_state, (U8)(LOC ? SPACEL : SPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'S':
- ret = reg_node(pRExC_state, (U8)(LOC ? NSPACEL : NSPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'd':
- ret = reg_node(pRExC_state, DIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'D':
- ret = reg_node(pRExC_state, NDIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'R':
- ret = reg_node(pRExC_state, LNBREAK);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'h':
- ret = reg_node(pRExC_state, HORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'H':
- ret = reg_node(pRExC_state, NHORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'v':
- ret = reg_node(pRExC_state, VERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'V':
- ret = reg_node(pRExC_state, NVERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- finish_meta_pat:
- nextchar(pRExC_state);
- Set_Node_Length(ret, 2); /* MJD */
- break;
- case 'p':
- case 'P':
- {
- char* const oldregxend = RExC_end;
-#ifdef DEBUGGING
- char* parse_start = RExC_parse - 2;
-#endif
-
- if (RExC_parse[1] == '{') {
- /* a lovely hack--pretend we saw [\pX] instead */
- RExC_end = strchr(RExC_parse, '}');
- if (!RExC_end) {
- const U8 c = (U8)*RExC_parse;
- RExC_parse += 2;
- RExC_end = oldregxend;
- vFAIL2("Missing right brace on \\%c{}", c);
- }
- RExC_end++;
- }
- else {
- RExC_end = RExC_parse + 2;
- if (RExC_end > oldregxend)
- RExC_end = oldregxend;
- }
- RExC_parse--;
-
- ret = regclass(pRExC_state,depth+1);
-
- RExC_end = oldregxend;
- RExC_parse--;
-
- Set_Node_Offset(ret, parse_start + 2);
- Set_Node_Cur_Length(ret);
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- }
- break;
- case 'N':
- /* Handle \N and \N{NAME} here and not below because it can be
- multicharacter. join_exact() will join them up later on.
- Also this makes sure that things like /\N{BLAH}+/ and
- \N{BLAH} being multi char Just Happen. dmq*/
- ++RExC_parse;
- ret= reg_namedseq(pRExC_state, NULL, flagp);
- break;
- case 'k': /* Handle \k<NAME> and \k'NAME' */
- parse_named_seq:
- {
- char ch= RExC_parse[1];
- if (ch != '<' && ch != '\'' && ch != '{') {
- RExC_parse++;
- vFAIL2("Sequence %.2s... not terminated",parse_start);
- } else {
- /* this pretty much dupes the code for (?P=...) in reg(), if
- you change this make sure you change that */
- char* name_start = (RExC_parse += 2);
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- ch= (ch == '<') ? '>' : (ch == '{') ? '}' : '\'';
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
-
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
-
- }
- break;
- }
- case 'g':
- case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 num;
- bool isg = *RExC_parse == 'g';
- bool isrel = 0;
- bool hasbrace = 0;
- if (isg) {
- RExC_parse++;
- if (*RExC_parse == '{') {
- RExC_parse++;
- hasbrace = 1;
- }
- if (*RExC_parse == '-') {
- RExC_parse++;
- isrel = 1;
- }
- if (hasbrace && !isDIGIT(*RExC_parse)) {
- if (isrel) RExC_parse--;
- RExC_parse -= 2;
- goto parse_named_seq;
- } }
- num = atoi(RExC_parse);
- if (isg && num == 0)
- vFAIL("Reference to invalid group 0");
- if (isrel) {
- num = RExC_npar - num;
- if (num < 1)
- vFAIL("Reference to nonexistent or unclosed group");
- }
- if (!isg && num > 9 && num >= RExC_npar)
- goto defchar;
- else {
- char * const parse_start = RExC_parse - 1; /* MJD */
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (parse_start == RExC_parse - 1)
- vFAIL("Unterminated \\g... pattern");
- if (hasbrace) {
- if (*RExC_parse != '}')
- vFAIL("Unterminated \\g{...} pattern");
- RExC_parse++;
- }
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens)
- vFAIL("Reference to nonexistent group");
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? REFFL : REFF) : REF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- }
- }
- break;
- case '\0':
- if (RExC_parse >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- /* Do not generate "unrecognized" warnings here, we fall
- back into the quick-grab loop below */
- parse_start--;
- goto defchar;
- }
- break;
-
- case '#':
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if ( reg_skipcomment( pRExC_state ) )
- goto tryagain;
- }
- /* FALL THROUGH */
-
- default:
- outer_default:{
- register STRLEN len;
- register UV ender;
- register char *p;
- char *s;
- STRLEN foldlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
-
- parse_start = RExC_parse - 1;
-
- RExC_parse++;
-
- defchar:
- ender = 0;
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s = STRING(ret);
- for (len = 0, p = RExC_parse - 1;
- len < 127 && p < RExC_end;
- len++)
- {
- char * const oldp = p;
-
- if (RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- switch ((U8)*p) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case '^':
- case '$':
- case '.':
- case '[':
- case '(':
- case ')':
- case '|':
- goto loopdone;
- case '\\':
- /* Literal Escapes Switch
-
- This switch is meant to handle escape sequences that
- resolve to a literal character.
-
- Every escape sequence that represents something
- else, like an assertion or a char class, is handled
- in the switch marked 'Special Escapes' above in this
- routine, but also has an entry here as anything that
- isn't explicitly mentioned here will be treated as
- an unescaped equivalent literal.
- */
-
- switch ((U8)*++p) {
- /* These are all the special escapes. */
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case 'A': /* Start assertion */
- case 'b': case 'B': /* Word-boundary assertion*/
- case 'C': /* Single char !DANGEROUS! */
- case 'd': case 'D': /* digit class */
- case 'g': case 'G': /* generic-backref, pos assertion */
- case 'h': case 'H': /* HORIZWS */
- case 'k': case 'K': /* named backref, keep marker */
- case 'N': /* named char sequence */
- case 'p': case 'P': /* Unicode property */
- case 'R': /* LNBREAK */
- case 's': case 'S': /* space class */
- case 'v': case 'V': /* VERTWS */
- case 'w': case 'W': /* word class */
- case 'X': /* eXtended Unicode "combining character sequence" */
- case 'z': case 'Z': /* End of line/string assertion */
- --p;
- goto loopdone;
-
- /* Anything after here is an escape that resolves to a
- literal. (Except digits, which may or may not)
- */
- case 'n':
- ender = '\n';
- p++;
- break;
- case 'r':
- ender = '\r';
- p++;
- break;
- case 't':
- ender = '\t';
- p++;
- break;
- case 'f':
- ender = '\f';
- p++;
- break;
- case 'e':
- ender = ASCII_TO_NATIVE('\033');
- p++;
- break;
- case 'a':
- ender = ASCII_TO_NATIVE('\007');
- p++;
- break;
- case 'x':
- if (*++p == '{') {
- char* const e = strchr(p, '}');
-
- if (!e) {
- RExC_parse = p + 1;
- vFAIL("Missing right brace on \\x{}");
- }
- else {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = e - p - 1;
- ender = grok_hex(p + 1, &numlen, &flags, NULL);
- if (ender > 0xff)
- RExC_utf8 = 1;
- p = e + 1;
- }
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = 2;
- ender = grok_hex(p, &numlen, &flags, NULL);
- p += numlen;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- p++;
- ender = UCHARAT(p++);
- ender = toCTRL(ender);
- break;
- case '0': case '1': case '2': case '3':case '4':
- case '5': case '6': case '7': case '8':case '9':
- if (*p == '0' ||
- (isDIGIT(p[1]) && atoi(p) >= RExC_npar) ) {
- I32 flags = 0;
- STRLEN numlen = 3;
- ender = grok_oct(p, &numlen, &flags, NULL);
-
- /* An octal above 0xff is interpreted differently
- * depending on if the re is in utf8 or not. If it
- * is in utf8, the value will be itself, otherwise
- * it is interpreted as modulo 0x100. It has been
- * decided to discourage the use of octal above the
- * single-byte range. For now, warn only when
- * it ends up modulo */
- if (SIZE_ONLY && ender >= 0x100
- && ! UTF && ! PL_encoding) {
- ckWARNregdep(p, "Use of octal value above 377 is deprecated");
- }
- p += numlen;
- }
- else {
- --p;
- goto loopdone;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- recode_encoding:
- {
- SV* enc = PL_encoding;
- ender = reg_recode((const char)(U8)ender, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(p, "Invalid escape in the specified encoding");
- RExC_utf8 = 1;
- }
- break;
- case '\0':
- if (p >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- if (!SIZE_ONLY&& isALPHA(*p))
- ckWARN2reg(p + 1, "Unrecognized escape \\%c passed through", UCHARAT(p));
- goto normal_default;
- }
- break;
- default:
- normal_default:
- if (UTF8_IS_START(*p) && UTF) {
- STRLEN numlen;
- ender = utf8n_to_uvchr((U8*)p, RExC_end - p,
- &numlen, UTF8_ALLOW_DEFAULT);
- p += numlen;
- }
- else
- ender = *p++;
- break;
- }
- if ( RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- if (UTF && FOLD) {
- /* Prime the casefolded buffer. */
- ender = toFOLD_uni(ender, tmpbuf, &foldlen);
- }
- if (p < RExC_end && ISMULT2(p)) { /* Back off on ?+*. */
- if (len)
- p = oldp;
- else if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- }
- else {
- len++;
- REGC((char)ender, s++);
- }
- break;
- }
- if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- len += unilen;
- s += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break;
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- len--;
- }
- else
- REGC((char)ender, s++);
- }
- loopdone:
- RExC_parse = p - 1;
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
- {
- /* len is STRLEN which is unsigned, need to copy to signed */
- IV iv = len;
- if (iv < 0)
- vFAIL("Internal disaster");
- }
- if (len > 0)
- *flagp |= HASWIDTH;
- if (len == 1 && UNI_IS_INVARIANT(ender))
- *flagp |= SIMPLE;
-
- if (SIZE_ONLY)
- RExC_size += STR_SZ(len);
- else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- }
- break;
- }
-
- return(ret);
-}
-
-STATIC char *
-S_regwhite( RExC_state_t *pRExC_state, char *p )
-{
- const char *e = RExC_end;
-
- PERL_ARGS_ASSERT_REGWHITE;
-
- while (p < e) {
- if (isSPACE(*p))
- ++p;
- else if (*p == '#') {
- bool ended = 0;
- do {
- if (*p++ == '\n') {
- ended = 1;
- break;
- }
- } while (p < e);
- if (!ended)
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- }
- else
- break;
- }
- return p;
-}
-
-/* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]].
- Character classes ([:foo:]) can also be negated ([:^foo:]).
- Returns a named class id (ANYOF_XXX) if successful, -1 otherwise.
- Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed,
- but trigger failures because they are currently unimplemented. */
-
-#define POSIXCC_DONE(c) ((c) == ':')
-#define POSIXCC_NOTYET(c) ((c) == '=' || (c) == '.')
-#define POSIXCC(c) (POSIXCC_DONE(c) || POSIXCC_NOTYET(c))
-
-STATIC I32
-S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value)
-{
- dVAR;
- I32 namedclass = OOB_NAMEDCLASS;
-
- PERL_ARGS_ASSERT_REGPPOSIXCC;
-
- if (value == '[' && RExC_parse + 1 < RExC_end &&
- /* I smell either [: or [= or [. -- POSIX has been here, right? */
- POSIXCC(UCHARAT(RExC_parse))) {
- const char c = UCHARAT(RExC_parse);
- char* const s = RExC_parse++;
-
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != c)
- RExC_parse++;
- if (RExC_parse == RExC_end)
- /* Grandfather lone [:, [=, [. */
- RExC_parse = s;
- else {
- const char* const t = RExC_parse++; /* skip over the c */
- assert(*t == c);
-
- if (UCHARAT(RExC_parse) == ']') {
- const char *posixcc = s + 1;
- RExC_parse++; /* skip over the ending ] */
-
- if (*s == ':') {
- const I32 complement = *posixcc == '^' ? *posixcc++ : 0;
- const I32 skip = t - posixcc;
-
- /* Initially switch on the length of the name. */
- switch (skip) {
- case 4:
- if (memEQ(posixcc, "word", 4)) /* this is not POSIX, this is the Perl \w */
- namedclass = complement ? ANYOF_NALNUM : ANYOF_ALNUM;
- break;
- case 5:
- /* Names all of length 5. */
- /* alnum alpha ascii blank cntrl digit graph lower
- print punct space upper */
- /* Offset 4 gives the best switch position. */
- switch (posixcc[4]) {
- case 'a':
- if (memEQ(posixcc, "alph", 4)) /* alpha */
- namedclass = complement ? ANYOF_NALPHA : ANYOF_ALPHA;
- break;
- case 'e':
- if (memEQ(posixcc, "spac", 4)) /* space */
- namedclass = complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC;
- break;
- case 'h':
- if (memEQ(posixcc, "grap", 4)) /* graph */
- namedclass = complement ? ANYOF_NGRAPH : ANYOF_GRAPH;
- break;
- case 'i':
- if (memEQ(posixcc, "asci", 4)) /* ascii */
- namedclass = complement ? ANYOF_NASCII : ANYOF_ASCII;
- break;
- case 'k':
- if (memEQ(posixcc, "blan", 4)) /* blank */
- namedclass = complement ? ANYOF_NBLANK : ANYOF_BLANK;
- break;
- case 'l':
- if (memEQ(posixcc, "cntr", 4)) /* cntrl */
- namedclass = complement ? ANYOF_NCNTRL : ANYOF_CNTRL;
- break;
- case 'm':
- if (memEQ(posixcc, "alnu", 4)) /* alnum */
- namedclass = complement ? ANYOF_NALNUMC : ANYOF_ALNUMC;
- break;
- case 'r':
- if (memEQ(posixcc, "lowe", 4)) /* lower */
- namedclass = complement ? ANYOF_NLOWER : ANYOF_LOWER;
- else if (memEQ(posixcc, "uppe", 4)) /* upper */
- namedclass = complement ? ANYOF_NUPPER : ANYOF_UPPER;
- break;
- case 't':
- if (memEQ(posixcc, "digi", 4)) /* digit */
- namedclass = complement ? ANYOF_NDIGIT : ANYOF_DIGIT;
- else if (memEQ(posixcc, "prin", 4)) /* print */
- namedclass = complement ? ANYOF_NPRINT : ANYOF_PRINT;
- else if (memEQ(posixcc, "punc", 4)) /* punct */
- namedclass = complement ? ANYOF_NPUNCT : ANYOF_PUNCT;
- break;
- }
- break;
- case 6:
- if (memEQ(posixcc, "xdigit", 6))
- namedclass = complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT;
- break;
- }
-
- if (namedclass == OOB_NAMEDCLASS)
- Simple_vFAIL3("POSIX class [:%.*s:] unknown",
- t - s - 1, s + 1);
- assert (posixcc[skip] == ':');
- assert (posixcc[skip+1] == ']');
- } else if (!SIZE_ONLY) {
- /* [[=foo=]] and [[.foo.]] are still future. */
-
- /* adjust RExC_parse so the warning shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse) != ']')
- RExC_parse++;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- } else {
- /* Maternal grandfather:
- * "[:" ending in ":" but not in ":]" */
- RExC_parse = s;
- }
- }
- }
-
- return namedclass;
-}
-
-STATIC void
-S_checkposixcc(pTHX_ RExC_state_t *pRExC_state)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_CHECKPOSIXCC;
-
- if (POSIXCC(UCHARAT(RExC_parse))) {
- const char *s = RExC_parse;
- const char c = *s++;
-
- while (isALNUM(*s))
- s++;
- if (*s && c == *s && s[1] == ']') {
- ckWARN3reg(s+2,
- "POSIX syntax [%c %c] belongs inside character classes",
- c, c);
-
- /* [[=foo=]] and [[.foo.]] are still future. */
- if (POSIXCC_NOTYET(c)) {
- /* adjust RExC_parse so the error shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse++) != ']')
- NOOP;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- }
- }
-}
-
-
-#define _C_C_T_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_N##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '!'; \
- what = WORD; \
- break
-
-#define _C_C_T_NOLOC_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '!'; \
- what = WORD; \
- break
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define POSIX_CC_UNI_NAME(CCNAME) CCNAME
-#else
-#define POSIX_CC_UNI_NAME(CCNAME) "Posix" CCNAME
-#endif
-
-/*
- parse a class specification and produce either an ANYOF node that
- matches the pattern or if the pattern matches a single char only and
- that char is < 256 and we are case insensitive then we produce an
- EXACT node instead.
-*/
-
-STATIC regnode *
-S_regclass(pTHX_ RExC_state_t *pRExC_state, U32 depth)
-{
- dVAR;
- register UV nextvalue;
- register IV prevvalue = OOB_UNICODE;
- register IV range = 0;
- UV value = 0; /* XXX:dmq: needs to be referenceable (unfortunately) */
- register regnode *ret;
- STRLEN numlen;
- IV namedclass;
- char *rangebegin = NULL;
- bool need_class = 0;
- SV *listsv = NULL;
- UV n;
- bool optimize_invert = TRUE;
- AV* unicode_alternate = NULL;
-#ifdef EBCDIC
- UV literal_endpoint = 0;
-#endif
- UV stored = 0; /* number of chars stored in the class */
-
- regnode * const orig_emit = RExC_emit; /* Save the original RExC_emit in
- case we need to change the emitted regop to an EXACT. */
- const char * orig_parse = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCLASS;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- DEBUG_PARSE("clas");
-
- /* Assume we are going to generate an ANYOF node. */
- ret = reganode(pRExC_state, ANYOF, 0);
-
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) = 0;
-
- if (UCHARAT(RExC_parse) == '^') { /* Complement of range. */
- RExC_naughty++;
- RExC_parse++;
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) |= ANYOF_INVERT;
- }
-
- if (SIZE_ONLY) {
- RExC_size += ANYOF_SKIP;
- listsv = &PL_sv_undef; /* For code scanners: listsv always non-NULL. */
- }
- else {
- RExC_emit += ANYOF_SKIP;
- if (FOLD)
- ANYOF_FLAGS(ret) |= ANYOF_FOLD;
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_LOCALE;
- ANYOF_BITMAP_ZERO(ret);
- listsv = newSVpvs("# comment\n");
- }
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
-
- if (!SIZE_ONLY && POSIXCC(nextvalue))
- checkposixcc(pRExC_state);
-
- /* allow 1st char to be ] (allowing it to be - is dealt with later) */
- if (UCHARAT(RExC_parse) == ']')
- goto charclassloop;
-
-parseit:
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != ']') {
-
- charclassloop:
-
- namedclass = OOB_NAMEDCLASS; /* initialize as illegal */
-
- if (!range)
- rangebegin = RExC_parse;
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
- if (value == '[' && POSIXCC(nextvalue))
- namedclass = regpposixcc(pRExC_state, value);
- else if (value == '\\') {
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
- /* Some compilers cannot handle switching on 64-bit integer
- * values, therefore value cannot be an UV. Yes, this will
- * be a problem later if we want switch on Unicode.
- * A similar issue a little bit later when switching on
- * namedclass. --jhi */
- switch ((I32)value) {
- case 'w': namedclass = ANYOF_ALNUM; break;
- case 'W': namedclass = ANYOF_NALNUM; break;
- case 's': namedclass = ANYOF_SPACE; break;
- case 'S': namedclass = ANYOF_NSPACE; break;
- case 'd': namedclass = ANYOF_DIGIT; break;
- case 'D': namedclass = ANYOF_NDIGIT; break;
- case 'v': namedclass = ANYOF_VERTWS; break;
- case 'V': namedclass = ANYOF_NVERTWS; break;
- case 'h': namedclass = ANYOF_HORIZWS; break;
- case 'H': namedclass = ANYOF_NHORIZWS; break;
- case 'N': /* Handle \N{NAME} in class */
- {
- /* We only pay attention to the first char of
- multichar strings being returned. I kinda wonder
- if this makes sense as it does change the behaviour
- from earlier versions, OTOH that behaviour was broken
- as well. */
- UV v; /* value is register so we cant & it /grrr */
- if (reg_namedseq(pRExC_state, &v, NULL)) {
- goto parseit;
- }
- value= v;
- }
- break;
- case 'p':
- case 'P':
- {
- char *e;
- if (RExC_parse >= RExC_end)
- vFAIL2("Empty \\%c{}", (U8)value);
- if (*RExC_parse == '{') {
- const U8 c = (U8)value;
- e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL2("Missing right brace on \\%c{}", c);
- while (isSPACE(UCHARAT(RExC_parse)))
- RExC_parse++;
- if (e == RExC_parse)
- vFAIL2("Empty \\%c{}", c);
- n = e - RExC_parse;
- while (isSPACE(UCHARAT(RExC_parse + n - 1)))
- n--;
- }
- else {
- e = RExC_parse;
- n = 1;
- }
- if (!SIZE_ONLY) {
- if (UCHARAT(RExC_parse) == '^') {
- RExC_parse++;
- n--;
- value = value == 'p' ? 'P' : 'p'; /* toggle */
- while (isSPACE(UCHARAT(RExC_parse))) {
- RExC_parse++;
- n--;
- }
- }
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::%.*s\n",
- (value=='p' ? '+' : '!'), (int)n, RExC_parse);
- }
- RExC_parse = e + 1;
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- namedclass = ANYOF_MAX; /* no official name, but it's named */
- }
- break;
- case 'n': value = '\n'; break;
- case 'r': value = '\r'; break;
- case 't': value = '\t'; break;
- case 'f': value = '\f'; break;
- case 'b': value = '\b'; break;
- case 'e': value = ASCII_TO_NATIVE('\033');break;
- case 'a': value = ASCII_TO_NATIVE('\007');break;
- case 'x':
- if (*RExC_parse == '{') {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- char * const e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL("Missing right brace on \\x{}");
-
- numlen = e - RExC_parse;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse = e + 1;
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- numlen = 2;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- }
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- value = UCHARAT(RExC_parse++);
- value = toCTRL(value);
- break;
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 flags = 0;
- numlen = 3;
- value = grok_oct(--RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- }
- recode_encoding:
- {
- SV* enc = PL_encoding;
- value = reg_recode((const char)(U8)value, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(RExC_parse,
- "Invalid escape in the specified encoding");
- break;
- }
- default:
- if (!SIZE_ONLY && isALPHA(value))
- ckWARN2reg(RExC_parse,
- "Unrecognized escape \\%c in character class passed through",
- (int)value);
- break;
- }
- } /* end of \blah */
-#ifdef EBCDIC
- else
- literal_endpoint++;
-#endif
-
- if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */
-
- if (!SIZE_ONLY && !need_class)
- ANYOF_CLASS_ZERO(ret);
-
- need_class = 1;
-
- /* a bad range like a-\d, a-[:digit:] ? */
- if (range) {
- if (!SIZE_ONLY) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- ckWARN4reg(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
-
- if (prevvalue < 256) {
- ANYOF_BITMAP_SET(ret, prevvalue);
- ANYOF_BITMAP_SET(ret, '-');
- }
- else {
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-');
- }
- }
-
- range = 0; /* this was not a true range */
- }
-
-
-
- if (!SIZE_ONLY) {
- const char *what = NULL;
- char yesno = 0;
-
- if (namedclass > OOB_NAMEDCLASS)
- optimize_invert = FALSE;
- /* Possible truncation here but in some 64-bit environments
- * the compiler gets heartburn about switch on 64-bit values.
- * A similar issue a little earlier when switching on value.
- * --jhi */
- switch ((I32)namedclass) {
-
- case _C_C_T_(ALNUMC, isALNUMC(value), POSIX_CC_UNI_NAME("Alnum"));
- case _C_C_T_(ALPHA, isALPHA(value), POSIX_CC_UNI_NAME("Alpha"));
- case _C_C_T_(BLANK, isBLANK(value), POSIX_CC_UNI_NAME("Blank"));
- case _C_C_T_(CNTRL, isCNTRL(value), POSIX_CC_UNI_NAME("Cntrl"));
- case _C_C_T_(GRAPH, isGRAPH(value), POSIX_CC_UNI_NAME("Graph"));
- case _C_C_T_(LOWER, isLOWER(value), POSIX_CC_UNI_NAME("Lower"));
- case _C_C_T_(PRINT, isPRINT(value), POSIX_CC_UNI_NAME("Print"));
- case _C_C_T_(PSXSPC, isPSXSPC(value), POSIX_CC_UNI_NAME("Space"));
- case _C_C_T_(PUNCT, isPUNCT(value), POSIX_CC_UNI_NAME("Punct"));
- case _C_C_T_(UPPER, isUPPER(value), POSIX_CC_UNI_NAME("Upper"));
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
- case _C_C_T_(ALNUM, isALNUM(value), "Word");
- case _C_C_T_(SPACE, isSPACE(value), "SpacePerl");
-#else
- case _C_C_T_(SPACE, isSPACE(value), "PerlSpace");
- case _C_C_T_(ALNUM, isALNUM(value), "PerlWord");
-#endif
- case _C_C_T_(XDIGIT, isXDIGIT(value), "XDigit");
- case _C_C_T_NOLOC_(VERTWS, is_VERTWS_latin1(&value), "VertSpace");
- case _C_C_T_NOLOC_(HORIZWS, is_HORIZWS_latin1(&value), "HorizSpace");
- case ANYOF_ASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_ASCII);
- else {
-#ifndef EBCDIC
- for (value = 0; value < 128; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '+';
- what = "ASCII";
- break;
- case ANYOF_NASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NASCII);
- else {
-#ifndef EBCDIC
- for (value = 128; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (!isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '!';
- what = "ASCII";
- break;
- case ANYOF_DIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_DIGIT);
- else {
- /* consecutive digits assumed */
- for (value = '0'; value <= '9'; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '+';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_NDIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NDIGIT);
- else {
- /* consecutive digits assumed */
- for (value = 0; value < '0'; value++)
- ANYOF_BITMAP_SET(ret, value);
- for (value = '9' + 1; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '!';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_MAX:
- /* this is to handle \p and \P */
- break;
- default:
- vFAIL("Invalid [::] class");
- break;
- }
- if (what) {
- /* Strings such as "+utf8::isWord\n" */
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::Is%s\n", yesno, what);
- }
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_CLASS;
- continue;
- }
- } /* end of namedclass \blah */
-
- if (range) {
- if (prevvalue > (IV)value) /* b-a */ {
- const int w = RExC_parse - rangebegin;
- Simple_vFAIL4("Invalid [] range \"%*.*s\"", w, w, rangebegin);
- range = 0; /* not a valid range */
- }
- }
- else {
- prevvalue = value; /* save the beginning of the range */
- if (*RExC_parse == '-' && RExC_parse+1 < RExC_end &&
- RExC_parse[1] != ']') {
- RExC_parse++;
-
- /* a bad range like \w-, [:word:]- ? */
- if (namedclass > OOB_NAMEDCLASS) {
- if (ckWARN(WARN_REGEXP)) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- vWARN4(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
- }
- if (!SIZE_ONLY)
- ANYOF_BITMAP_SET(ret, '-');
- } else
- range = 1; /* yeah, it's a range! */
- continue; /* but do it the next time */
- }
- }
-
- /* now is the next time */
- /*stored += (value - prevvalue + 1);*/
- if (!SIZE_ONLY) {
- if (prevvalue < 256) {
- const IV ceilvalue = value < 256 ? value : 255;
- IV i;
-#ifdef EBCDIC
- /* In EBCDIC [\x89-\x91] should include
- * the \x8e but [i-j] should not. */
- if (literal_endpoint == 2 &&
- ((isLOWER(prevvalue) && isLOWER(ceilvalue)) ||
- (isUPPER(prevvalue) && isUPPER(ceilvalue))))
- {
- if (isLOWER(prevvalue)) {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isLOWER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- } else {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isUPPER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- else
-#endif
- for (i = prevvalue; i <= ceilvalue; i++) {
- if (!ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- if (value > 255 || UTF) {
- const UV prevnatvalue = NATIVE_TO_UNI(prevvalue);
- const UV natvalue = NATIVE_TO_UNI(value);
- stored+=2; /* can't optimize this class */
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- if (prevnatvalue < natvalue) { /* what about > ? */
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n",
- prevnatvalue, natvalue);
- }
- else if (prevnatvalue == natvalue) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", natvalue);
- if (FOLD) {
- U8 foldbuf[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const UV f = to_uni_fold(natvalue, foldbuf, &foldlen);
-
-#ifdef EBCDIC /* RD t/uni/fold ff and 6b */
- if (RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xDF || f == 0x92)) {
- f = NATIVE_TO_UNI(f);
- }
-#endif
- /* If folding and foldable and a single
- * character, insert also the folded version
- * to the charclass. */
- if (f != value) {
-#ifdef EBCDIC /* RD tunifold ligatures s,t fb05, fb06 */
- if ((RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xA2 &&
- (value == 0xFB05 || value == 0xFB06))) ?
- foldlen == ((STRLEN)UNISKIP(f) - 1) :
- foldlen == (STRLEN)UNISKIP(f) )
-#else
- if (foldlen == (STRLEN)UNISKIP(f))
-#endif
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n", f);
- else {
- /* Any multicharacter foldings
- * require the following transform:
- * [ABCDEF] -> (?:[ABCabcDEFd]|pq|rst)
- * where E folds into "pq" and F folds
- * into "rst", all other characters
- * fold to single characters. We save
- * away these multicharacter foldings,
- * to be later saved as part of the
- * additional "s" data. */
- SV *sv;
-
- if (!unicode_alternate)
- unicode_alternate = newAV();
- sv = newSVpvn_utf8((char*)foldbuf, foldlen,
- TRUE);
- av_push(unicode_alternate, sv);
- }
- }
-
- /* If folding and the value is one of the Greek
- * sigmas insert a few more sigmas to make the
- * folding rules of the sigmas to work right.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (literal or EXACTF cases) are handled
- * during runtime in regexec.c:S_find_byclass(). */
- if (value == UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA);
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- else if (value == UNICODE_GREEK_CAPITAL_LETTER_SIGMA)
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- }
- }
-#ifdef EBCDIC
- literal_endpoint = 0;
-#endif
- }
-
- range = 0; /* this range (if it was one) is done now */
- }
-
- if (need_class) {
- ANYOF_FLAGS(ret) |= ANYOF_LARGE;
- if (SIZE_ONLY)
- RExC_size += ANYOF_CLASS_ADD_SKIP;
- else
- RExC_emit += ANYOF_CLASS_ADD_SKIP;
- }
-
-
- if (SIZE_ONLY)
- return ret;
- /****** !SIZE_ONLY AFTER HERE *********/
-
- if( stored == 1 && (value < 128 || (value < 256 && !UTF))
- && !( ANYOF_FLAGS(ret) & ( ANYOF_FLAGS_ALL ^ ANYOF_FOLD ) )
- ) {
- /* optimize single char class to an EXACT node
- but *only* when its not a UTF/high char */
- const char * cur_parse= RExC_parse;
- RExC_emit = (regnode *)orig_emit;
- RExC_parse = (char *)orig_parse;
- ret = reg_node(pRExC_state,
- (U8)((ANYOF_FLAGS(ret) & ANYOF_FOLD) ? EXACTF : EXACT));
- RExC_parse = (char *)cur_parse;
- *STRING(ret)= (char)value;
- STR_LEN(ret)= 1;
- RExC_emit += STR_SZ(1);
- SvREFCNT_dec(listsv);
- return ret;
- }
- /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */
- if ( /* If the only flag is folding (plus possibly inversion). */
- ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD)
- ) {
- for (value = 0; value < 256; ++value) {
- if (ANYOF_BITMAP_TEST(ret, value)) {
- UV fold = PL_fold[value];
-
- if (fold != value)
- ANYOF_BITMAP_SET(ret, fold);
- }
- }
- ANYOF_FLAGS(ret) &= ~ANYOF_FOLD;
- }
-
- /* optimize inverted simple patterns (e.g. [^a-z]) */
- if (optimize_invert &&
- /* If the only flag is inversion. */
- (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) {
- for (value = 0; value < ANYOF_BITMAP_SIZE; ++value)
- ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL;
- ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL;
- }
- {
- AV * const av = newAV();
- SV *rv;
- /* The 0th element stores the character class description
- * in its textual form: used later (regexec.c:Perl_regclass_swash())
- * to initialize the appropriate swash (which gets stored in
- * the 1st element), and also useful for dumping the regnode.
- * The 2nd element stores the multicharacter foldings,
- * used later (regexec.c:S_reginclass()). */
- av_store(av, 0, listsv);
- av_store(av, 1, NULL);
- av_store(av, 2, MUTABLE_SV(unicode_alternate));
- rv = newRV_noinc(MUTABLE_SV(av));
- n = add_data(pRExC_state, 1, "s");
- RExC_rxi->data->data[n] = (void*)rv;
- ARG_SET(ret, n);
- }
- return ret;
-}
-#undef _C_C_T_
-
-
-/* reg_skipcomment()
-
- Absorbs an /x style # comments from the input stream.
- Returns true if there is more text remaining in the stream.
- Will set the REG_SEEN_RUN_ON_COMMENT flag if the comment
- terminates the pattern without including a newline.
-
- Note its the callers responsibility to ensure that we are
- actually in /x mode
-
-*/
-
-STATIC bool
-S_reg_skipcomment(pTHX_ RExC_state_t *pRExC_state)
-{
- bool ended = 0;
-
- PERL_ARGS_ASSERT_REG_SKIPCOMMENT;
-
- while (RExC_parse < RExC_end)
- if (*RExC_parse++ == '\n') {
- ended = 1;
- break;
- }
- if (!ended) {
- /* we ran off the end of the pattern without ending
- the comment, so we have to add an \n when wrapping */
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- return 0;
- } else
- return 1;
-}
-
-/* nextchar()
-
- Advance that parse position, and optionall absorbs
- "whitespace" from the inputstream.
-
- Without /x "whitespace" means (?#...) style comments only,
- with /x this means (?#...) and # comments and whitespace proper.
-
- Returns the RExC_parse point from BEFORE the scan occurs.
-
- This is the /x friendly way of saying RExC_parse++.
-*/
-
-STATIC char*
-S_nextchar(pTHX_ RExC_state_t *pRExC_state)
-{
- char* const retval = RExC_parse++;
-
- PERL_ARGS_ASSERT_NEXTCHAR;
-
- for (;;) {
- if (*RExC_parse == '(' && RExC_parse[1] == '?' &&
- RExC_parse[2] == '#') {
- while (*RExC_parse != ')') {
- if (RExC_parse == RExC_end)
- FAIL("Sequence (?#... not terminated");
- RExC_parse++;
- }
- RExC_parse++;
- continue;
- }
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if (isSPACE(*RExC_parse)) {
- RExC_parse++;
- continue;
- }
- else if (*RExC_parse == '#') {
- if ( reg_skipcomment( pRExC_state ) )
- continue;
- }
- }
- return retval;
- }
-}
-
-/*
-- reg_node - emit a node
-*/
-STATIC regnode * /* Location. */
-S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 1;
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE(ptr, op);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s:%d: (op %s) %s %"UVuf" (len %"UVuf") (max %"UVuf").\n",
- "reg_node", __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(RExC_emit, RExC_parse + (op == END));
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reganode - emit a node with an argument
-*/
-STATIC regnode * /* Location. */
-S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGANODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 2;
- /*
- We can't do this:
-
- assert(2==regarglen[op]+1);
-
- Anything larger than this has to allocate the extra amount.
- If we changed this to be:
-
- RExC_size += (1 + regarglen[op]);
-
- then it wouldn't matter. Its not clear what side effect
- might come from that so its not done so far.
- -- dmq
- */
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE_ARG(ptr, op, arg);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reganode",
- __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] ?
- "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Cur_Node_Offset;
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reguni - emit (if appropriate) a Unicode character
-*/
-STATIC STRLEN
-S_reguni(pTHX_ const RExC_state_t *pRExC_state, UV uv, char* s)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGUNI;
-
- return SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s);
-}
-
-/*
-- reginsert - insert an operator in front of already-emitted operand
-*
-* Means relocating the operand.
-*/
-STATIC void
-S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd, U32 depth)
-{
- dVAR;
- register regnode *src;
- register regnode *dst;
- register regnode *place;
- const int offset = regarglen[(U8)op];
- const int size = NODE_STEP_REGNODE + offset;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGINSERT;
- PERL_UNUSED_ARG(depth);
-/* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */
- DEBUG_PARSE_FMT("inst"," - %s",PL_reg_name[op]);
- if (SIZE_ONLY) {
- RExC_size += size;
- return;
- }
-
- src = RExC_emit;
- RExC_emit += size;
- dst = RExC_emit;
- if (RExC_open_parens) {
- int paren;
- /*DEBUG_PARSE_FMT("inst"," - %"IVdf, (IV)RExC_npar);*/
- for ( paren=0 ; paren < RExC_npar ; paren++ ) {
- if ( RExC_open_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("open"," - %d",size);*/
- RExC_open_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("open"," - %s","ok");*/
- }
- if ( RExC_close_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("close"," - %d",size);*/
- RExC_close_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("close"," - %s","ok");*/
- }
- }
- }
-
- while (src > opnd) {
- StructCopy(--src, --dst, regnode);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD 20010112 */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s copy %"UVuf" -> %"UVuf" (max %"UVuf").\n",
- "reg_insert",
- __LINE__,
- PL_reg_name[op],
- (UV)(dst - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(src - RExC_emit_start),
- (UV)(dst - RExC_emit_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src));
- Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src));
- }
-#endif
- }
-
-
- place = opnd; /* Op node, where operand used to be. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reginsert",
- __LINE__,
- PL_reg_name[op],
- (UV)(place - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(place - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(place, RExC_parse);
- Set_Node_Length(place, 1);
- }
-#endif
- src = NEXTOPER(place);
- FILL_ADVANCE_NODE(place, op);
- Zero(src, offset, regnode);
-}
-
-/*
-- regtail - set the next-pointer at the end of a node chain of p to val.
-- SEE ALSO: regtail_study
-*/
-/* TODO: All three parms should be const */
-STATIC void
-S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- if (SIZE_ONLY)
- return;
-
- /* Find last node. */
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tail" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) %s %s\n",
- SvPV_nolen_const(mysv), REG_NODE_NUM(scan),
- (temp == NULL ? "->" : ""),
- (temp == NULL ? PL_reg_name[OP(val)] : "")
- );
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
-
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-}
-
-#ifdef DEBUGGING
-/*
-- regtail_study - set the next-pointer at the end of a node chain of p to val.
-- Look for optimizable sequences at the same time.
-- currently only looks for EXACT chains.
-
-This is expermental code. The idea is to use this routine to perform
-in place optimizations on branches and groups as they are constructed,
-with the long term intention of removing optimization from study_chunk so
-that it is purely analytical.
-
-Currently only used when in DEBUG mode. The macro REGTAIL_STUDY() is used
-to control which is which.
-
-*/
-/* TODO: All four parms should be const */
-
-STATIC U8
-S_regtail_study(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- U8 exact = PSEUDO;
-#ifdef EXPERIMENTAL_INPLACESCAN
- I32 min = 0;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL_STUDY;
-
-
- if (SIZE_ONLY)
- return exact;
-
- /* Find last node. */
-
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (PL_regkind[OP(scan)] == EXACT)
- if (join_exact(pRExC_state,scan,&min,1,val,depth+1))
- return EXACT;
-#endif
- if ( exact ) {
- switch (OP(scan)) {
- case EXACT:
- case EXACTF:
- case EXACTFL:
- if( exact == PSEUDO )
- exact= OP(scan);
- else if ( exact != OP(scan) )
- exact= 0;
- case NOTHING:
- break;
- default:
- exact= 0;
- }
- }
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tsdy" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) -> %s\n",
- SvPV_nolen_const(mysv),
- REG_NODE_NUM(scan),
- PL_reg_name[exact]);
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
- DEBUG_PARSE_r({
- SV * const mysv_val=sv_newmortal();
- DEBUG_PARSE_MSG("");
- regprop(RExC_rx, mysv_val, val);
- PerlIO_printf(Perl_debug_log, "~ attach to %s (%"IVdf") offset to %"IVdf"\n",
- SvPV_nolen_const(mysv_val),
- (IV)REG_NODE_NUM(val),
- (IV)(val - scan)
- );
- });
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-
- return exact;
-}
-#endif
-
-/*
- - regcurly - a little FSA that accepts {\d+,?\d*}
- */
-STATIC I32
-S_regcurly(register const char *s)
-{
- PERL_ARGS_ASSERT_REGCURLY;
-
- if (*s++ != '{')
- return FALSE;
- if (!isDIGIT(*s))
- return FALSE;
- while (isDIGIT(*s))
- s++;
- if (*s == ',')
- s++;
- while (isDIGIT(*s))
- s++;
- if (*s != '}')
- return FALSE;
- return TRUE;
-}
-
-
-/*
- - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form
- */
-#ifdef DEBUGGING
-static void
-S_regdump_extflags(pTHX_ const char *lead, const U32 flags)
-{
- int bit;
- int set=0;
-
- for (bit=0; bit<32; bit++) {
- if (flags & (1<<bit)) {
- if (!set++ && lead)
- PerlIO_printf(Perl_debug_log, "%s",lead);
- PerlIO_printf(Perl_debug_log, "%s ",PL_reg_extflags_name[bit]);
- }
- }
- if (lead) {
- if (set)
- PerlIO_printf(Perl_debug_log, "\n");
- else
- PerlIO_printf(Perl_debug_log, "%s[none-set]\n",lead);
- }
-}
-#endif
-
-void
-Perl_regdump(pTHX_ const regexp *r)
-{
-#ifdef DEBUGGING
- dVAR;
- SV * const sv = sv_newmortal();
- SV *dsv= sv_newmortal();
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGDUMP;
-
- (void)dumpuntil(r, ri->program, ri->program + 1, NULL, NULL, sv, 0, 0);
-
- /* Header fields of interest. */
- if (r->anchored_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->anchored_substr),
- RE_SV_DUMPLEN(r->anchored_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_substr),
- (IV)r->anchored_offset);
- } else if (r->anchored_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->anchored_utf8),
- RE_SV_DUMPLEN(r->anchored_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored utf8 %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_utf8),
- (IV)r->anchored_offset);
- }
- if (r->float_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->float_substr),
- RE_SV_DUMPLEN(r->float_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "floating %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_substr),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- } else if (r->float_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->float_utf8),
- RE_SV_DUMPLEN(r->float_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "floating utf8 %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_utf8),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- }
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log,
- (const char *)
- (r->check_substr == r->float_substr
- && r->check_utf8 == r->float_utf8
- ? "(checking floating" : "(checking anchored"));
- if (r->extflags & RXf_NOSCAN)
- PerlIO_printf(Perl_debug_log, " noscan");
- if (r->extflags & RXf_CHECK_ALL)
- PerlIO_printf(Perl_debug_log, " isall");
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log, ") ");
-
- if (ri->regstclass) {
- regprop(r, sv, ri->regstclass);
- PerlIO_printf(Perl_debug_log, "stclass %s ", SvPVX_const(sv));
- }
- if (r->extflags & RXf_ANCH) {
- PerlIO_printf(Perl_debug_log, "anchored");
- if (r->extflags & RXf_ANCH_BOL)
- PerlIO_printf(Perl_debug_log, "(BOL)");
- if (r->extflags & RXf_ANCH_MBOL)
- PerlIO_printf(Perl_debug_log, "(MBOL)");
- if (r->extflags & RXf_ANCH_SBOL)
- PerlIO_printf(Perl_debug_log, "(SBOL)");
- if (r->extflags & RXf_ANCH_GPOS)
- PerlIO_printf(Perl_debug_log, "(GPOS)");
- PerlIO_putc(Perl_debug_log, ' ');
- }
- if (r->extflags & RXf_GPOS_SEEN)
- PerlIO_printf(Perl_debug_log, "GPOS:%"UVuf" ", (UV)r->gofs);
- if (r->intflags & PREGf_SKIP)
- PerlIO_printf(Perl_debug_log, "plus ");
- if (r->intflags & PREGf_IMPLICIT)
- PerlIO_printf(Perl_debug_log, "implicit ");
- PerlIO_printf(Perl_debug_log, "minlen %"IVdf" ", (IV)r->minlen);
- if (r->extflags & RXf_EVAL_SEEN)
- PerlIO_printf(Perl_debug_log, "with eval ");
- PerlIO_printf(Perl_debug_log, "\n");
- DEBUG_FLAGS_r(regdump_extflags("r->extflags: ",r->extflags));
-#else
- PERL_ARGS_ASSERT_REGDUMP;
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(r);
-#endif /* DEBUGGING */
-}
-
-/*
-- regprop - printable representation of opcode
-*/
-#define EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags) \
-STMT_START { \
- if (do_sep) { \
- Perl_sv_catpvf(aTHX_ sv,"%s][%s",PL_colors[1],PL_colors[0]); \
- if (flags & ANYOF_INVERT) \
- /*make sure the invert info is in each */ \
- sv_catpvs(sv, "^"); \
- do_sep = 0; \
- } \
-} STMT_END
-
-void
-Perl_regprop(pTHX_ const regexp *prog, SV *sv, const regnode *o)
-{
-#ifdef DEBUGGING
- dVAR;
- register int k;
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPROP;
-
- sv_setpvs(sv, "");
-
- if (OP(o) > REGNODE_MAX) /* regnode.type is unsigned */
- /* It would be nice to FAIL() here, but this may be called from
- regexec.c, and it would be hard to supply pRExC_state. */
- Perl_croak(aTHX_ "Corrupted regexp opcode %d > %d", (int)OP(o), (int)REGNODE_MAX);
- sv_catpv(sv, PL_reg_name[OP(o)]); /* Take off const! */
-
- k = PL_regkind[OP(o)];
-
- if (k == EXACT) {
- sv_catpvs(sv, " ");
- /* Using is_utf8_string() (via PERL_PV_UNI_DETECT)
- * is a crude hack but it may be the best for now since
- * we have no flag "this EXACTish node was UTF-8"
- * --jhi */
- pv_pretty(sv, STRING(o), STR_LEN(o), 60, PL_colors[0], PL_colors[1],
- PERL_PV_ESCAPE_UNI_DETECT |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT |
- PERL_PV_PRETTY_NOCLEAR
- );
- } else if (k == TRIE) {
- /* print the details of the trie in dumpuntil instead, as
- * progi->data isn't available here */
- const char op = OP(o);
- const U32 n = ARG(o);
- const reg_ac_data * const ac = IS_TRIE_AC(op) ?
- (reg_ac_data *)progi->data->data[n] :
- NULL;
- const reg_trie_data * const trie
- = (reg_trie_data*)progi->data->data[!IS_TRIE_AC(op) ? n : ac->trie];
-
- Perl_sv_catpvf(aTHX_ sv, "-%s",PL_reg_name[o->flags]);
- DEBUG_TRIE_COMPILE_r(
- Perl_sv_catpvf(aTHX_ sv,
- "<S:%"UVuf"/%"IVdf" W:%"UVuf" L:%"UVuf"/%"UVuf" C:%"UVuf"/%"UVuf">",
- (UV)trie->startstate,
- (IV)trie->statecount-1, /* -1 because of the unused 0 element */
- (UV)trie->wordcount,
- (UV)trie->minlen,
- (UV)trie->maxlen,
- (UV)TRIE_CHARCOUNT(trie),
- (UV)trie->uniquecharcount
- )
- );
- if ( IS_ANYOF_TRIE(op) || trie->bitmap ) {
- int i;
- int rangestart = -1;
- U8* bitmap = IS_ANYOF_TRIE(op) ? (U8*)ANYOF_BITMAP(o) : (U8*)TRIE_BITMAP(trie);
- sv_catpvs(sv, "[");
- for (i = 0; i <= 256; i++) {
- if (i < 256 && BITMAP_TEST(bitmap,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- rangestart = -1;
- }
- }
- sv_catpvs(sv, "]");
- }
-
- } else if (k == CURLY) {
- if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */
- Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o));
- }
- else if (k == WHILEM && o->flags) /* Ordinal/of */
- Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4);
- else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP || OP(o)==ACCEPT) {
- Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */
- if ( RXp_PAREN_NAMES(prog) ) {
- if ( k != REF || OP(o) < NREF) {
- AV *list= MUTABLE_AV(progi->data->data[progi->name_list_idx]);
- SV **name= av_fetch(list, ARG(o), 0 );
- if (name)
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- else {
- AV *list= MUTABLE_AV(progi->data->data[ progi->name_list_idx ]);
- SV *sv_dat= MUTABLE_SV(progi->data->data[ ARG( o ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
- SV **name= av_fetch(list, nums[0], 0 );
- I32 n;
- if (name) {
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- Perl_sv_catpvf(aTHX_ sv, "%s%"IVdf,
- (n ? "," : ""), (IV)nums[n]);
- }
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- }
- }
- } else if (k == GOSUB)
- Perl_sv_catpvf(aTHX_ sv, "%d[%+d]", (int)ARG(o),(int)ARG2L(o)); /* Paren and offset */
- else if (k == VERB) {
- if (!o->flags)
- Perl_sv_catpvf(aTHX_ sv, ":%"SVf,
- SVfARG((MUTABLE_SV(progi->data->data[ ARG( o ) ]))));
- } else if (k == LOGICAL)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */
- else if (k == FOLDCHAR)
- Perl_sv_catpvf(aTHX_ sv, "[0x%"UVXf"]", PTR2UV(ARG(o)) );
- else if (k == ANYOF) {
- int i, rangestart = -1;
- const U8 flags = ANYOF_FLAGS(o);
- int do_sep = 0;
-
- /* Should be synchronized with * ANYOF_ #xdefines in regcomp.h */
- static const char * const anyofs[] = {
- "\\w",
- "\\W",
- "\\s",
- "\\S",
- "\\d",
- "\\D",
- "[:alnum:]",
- "[:^alnum:]",
- "[:alpha:]",
- "[:^alpha:]",
- "[:ascii:]",
- "[:^ascii:]",
- "[:cntrl:]",
- "[:^cntrl:]",
- "[:graph:]",
- "[:^graph:]",
- "[:lower:]",
- "[:^lower:]",
- "[:print:]",
- "[:^print:]",
- "[:punct:]",
- "[:^punct:]",
- "[:upper:]",
- "[:^upper:]",
- "[:xdigit:]",
- "[:^xdigit:]",
- "[:space:]",
- "[:^space:]",
- "[:blank:]",
- "[:^blank:]"
- };
-
- if (flags & ANYOF_LOCALE)
- sv_catpvs(sv, "{loc}");
- if (flags & ANYOF_FOLD)
- sv_catpvs(sv, "{i}");
- Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]);
- if (flags & ANYOF_INVERT)
- sv_catpvs(sv, "^");
-
- /* output what the standard cp 0-255 bitmap matches */
- for (i = 0; i <= 256; i++) {
- if (i < 256 && ANYOF_BITMAP_TEST(o,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- do_sep = 1;
- rangestart = -1;
- }
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
- /* output any special charclass tests (used mostly under use locale) */
- if (o->flags & ANYOF_CLASS)
- for (i = 0; i < (int)(sizeof(anyofs)/sizeof(char*)); i++)
- if (ANYOF_CLASS_TEST(o,i)) {
- sv_catpv(sv, anyofs[i]);
- do_sep = 1;
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
-
- /* output information about the unicode matching */
- if (flags & ANYOF_UNICODE)
- sv_catpvs(sv, "{unicode}");
- else if (flags & ANYOF_UNICODE_ALL)
- sv_catpvs(sv, "{unicode_all}");
-
- {
- SV *lv;
- SV * const sw = regclass_swash(prog, o, FALSE, &lv, 0);
-
- if (lv) {
- if (sw) {
- U8 s[UTF8_MAXBYTES_CASE+1];
-
- for (i = 0; i <= 256; i++) { /* just the first 256 */
- uvchr_to_utf8(s, i);
-
- if (i < 256 && swash_fetch(sw, s, TRUE)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++) {
- const U8 * const e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for(p = s; p < e; p++)
- put_byte(sv, *p);
- }
- else {
- const U8 *e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- sv_catpvs(sv, "-");
- e = uvchr_to_utf8(s, i-1);
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- }
- rangestart = -1;
- }
- }
-
- sv_catpvs(sv, "..."); /* et cetera */
- }
-
- {
- char *s = savesvpv(lv);
- char * const origs = s;
-
- while (*s && *s != '\n')
- s++;
-
- if (*s == '\n') {
- const char * const t = ++s;
-
- while (*s) {
- if (*s == '\n')
- *s = ' ';
- s++;
- }
- if (s[-1] == ' ')
- s[-1] = 0;
-
- sv_catpv(sv, t);
- }
-
- Safefree(origs);
- }
- }
- }
-
- Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]);
- }
- else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH))
- Perl_sv_catpvf(aTHX_ sv, "[%d]", -(o->flags));
-#else
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(sv);
- PERL_UNUSED_ARG(o);
- PERL_UNUSED_ARG(prog);
-#endif /* DEBUGGING */
-}
-
-SV *
-Perl_re_intuit_string(pTHX_ REGEXP * const r)
-{ /* Assume that RE_INTUIT is set */
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_STRING;
- PERL_UNUSED_CONTEXT;
-
- DEBUG_COMPILE_r(
- {
- const char * const s = SvPV_nolen_const(prog->check_substr
- ? prog->check_substr : prog->check_utf8);
-
- if (!PL_colorset) reginitcolors();
- PerlIO_printf(Perl_debug_log,
- "%sUsing REx %ssubstr:%s \"%s%.60s%s%s\"\n",
- PL_colors[4],
- prog->check_substr ? "" : "utf8 ",
- PL_colors[5],PL_colors[0],
- s,
- PL_colors[1],
- (strlen(s) > 60 ? "..." : ""));
- } );
-
- return prog->check_substr ? prog->check_substr : prog->check_utf8;
-}
-
-/*
- pregfree()
-
- handles refcounting and freeing the perl core regexp structure. When
- it is necessary to actually free the structure the first thing it
- does is call the 'free' method of the regexp_engine associated to to
- the regexp, allowing the handling of the void *pprivate; member
- first. (This routine is not overridable by extensions, which is why
- the extensions free is called first.)
-
- See regdupe and regdupe_internal if you change anything here.
-*/
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_pregfree(pTHX_ REGEXP *r)
-{
- SvREFCNT_dec(r);
-}
-
-void
-Perl_pregfree2(pTHX_ REGEXP *rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_PREGFREE2;
-
- if (r->mother_re) {
- ReREFCNT_dec(r->mother_re);
- } else {
- CALLREGFREE_PVT(rx); /* free the private data */
- SvREFCNT_dec(RXp_PAREN_NAMES(r));
- }
- if (r->substrs) {
- SvREFCNT_dec(r->anchored_substr);
- SvREFCNT_dec(r->anchored_utf8);
- SvREFCNT_dec(r->float_substr);
- SvREFCNT_dec(r->float_utf8);
- Safefree(r->substrs);
- }
- RX_MATCH_COPY_FREE(rx);
-#ifdef PERL_OLD_COPY_ON_WRITE
- SvREFCNT_dec(r->saved_copy);
-#endif
- Safefree(r->offs);
-}
-
-/* reg_temp_copy()
-
- This is a hacky workaround to the structural issue of match results
- being stored in the regexp structure which is in turn stored in
- PL_curpm/PL_reg_curpm. The problem is that due to qr// the pattern
- could be PL_curpm in multiple contexts, and could require multiple
- result sets being associated with the pattern simultaneously, such
- as when doing a recursive match with (??{$qr})
-
- The solution is to make a lightweight copy of the regexp structure
- when a qr// is returned from the code executed by (??{$qr}) this
- lightweight copy doesnt actually own any of its data except for
- the starp/end and the actual regexp structure itself.
-
-*/
-
-
-REGEXP *
-Perl_reg_temp_copy (pTHX_ REGEXP *ret_x, REGEXP *rx)
-{
- struct regexp *ret;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- register const I32 npar = r->nparens+1;
-
- PERL_ARGS_ASSERT_REG_TEMP_COPY;
-
- if (!ret_x)
- ret_x = (REGEXP*) newSV_type(SVt_REGEXP);
- ret = (struct regexp *)SvANY(ret_x);
-
- (void)ReREFCNT_inc(rx);
- /* We can take advantage of the existing "copied buffer" mechanism in SVs
- by pointing directly at the buffer, but flagging that the allocated
- space in the copy is zero. As we've just done a struct copy, it's now
- a case of zero-ing that, rather than copying the current length. */
- SvPV_set(ret_x, RX_WRAPPED(rx));
- SvFLAGS(ret_x) |= SvFLAGS(rx) & (SVf_POK|SVp_POK|SVf_UTF8);
- memcpy(&(ret->xpv_cur), &(r->xpv_cur),
- sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur));
- SvLEN_set(ret_x, 0);
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if (r->substrs) {
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- SvREFCNT_inc_void(ret->anchored_substr);
- SvREFCNT_inc_void(ret->anchored_utf8);
- SvREFCNT_inc_void(ret->float_substr);
- SvREFCNT_inc_void(ret->float_utf8);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
- }
- RX_MATCH_COPIED_off(ret_x);
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
- ret->mother_re = rx;
-
- return ret_x;
-}
-#endif
-
-/* regfree_internal()
-
- Free the private data in a regexp. This is overloadable by
- extensions. Perl takes care of the regexp structure in pregfree(),
- this covers the *pprivate pointer which technically perldoesnt
- know about, however of course we have to handle the
- regexp_internal structure when no extension is in use.
-
- Note this is called before freeing anything in the regexp
- structure.
- */
-
-void
-Perl_regfree_internal(pTHX_ REGEXP * const rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGFREE_INTERNAL;
-
- DEBUG_COMPILE_r({
- if (!PL_colorset)
- reginitcolors();
- {
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RX_UTF8(rx),
- dsv, RX_PRECOMP(rx), RX_PRELEN(rx), 60);
- PerlIO_printf(Perl_debug_log,"%sFreeing REx:%s %s\n",
- PL_colors[4],PL_colors[5],s);
- }
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets)
- Safefree(ri->u.offsets); /* 20010421 MJD */
-#endif
- if (ri->data) {
- int n = ri->data->count;
- PAD* new_comppad = NULL;
- PAD* old_comppad;
- PADOFFSET refcnt;
-
- while (--n >= 0) {
- /* If you add a ->what type here, update the comment in regcomp.h */
- switch (ri->data->what[n]) {
- case 's':
- case 'S':
- case 'u':
- SvREFCNT_dec(MUTABLE_SV(ri->data->data[n]));
- break;
- case 'f':
- Safefree(ri->data->data[n]);
- break;
- case 'p':
- new_comppad = MUTABLE_AV(ri->data->data[n]);
- break;
- case 'o':
- if (new_comppad == NULL)
- Perl_croak(aTHX_ "panic: pregfree comppad");
- PAD_SAVE_LOCAL(old_comppad,
- /* Watch out for global destruction's random ordering. */
- (SvTYPE(new_comppad) == SVt_PVAV) ? new_comppad : NULL
- );
- OP_REFCNT_LOCK;
- refcnt = OpREFCNT_dec((OP_4tree*)ri->data->data[n]);
- OP_REFCNT_UNLOCK;
- if (!refcnt)
- op_free((OP_4tree*)ri->data->data[n]);
-
- PAD_RESTORE_LOCAL(old_comppad);
- SvREFCNT_dec(MUTABLE_SV(new_comppad));
- new_comppad = NULL;
- break;
- case 'n':
- break;
- case 'T':
- { /* Aho Corasick add-on structure for a trie node.
- Used in stclass optimization only */
- U32 refcount;
- reg_ac_data *aho=(reg_ac_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --aho->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(aho->states);
- PerlMemShared_free(aho->fail);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- PerlMemShared_free(ri->regstclass);
- }
- }
- break;
- case 't':
- {
- /* trie structure. */
- U32 refcount;
- reg_trie_data *trie=(reg_trie_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --trie->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(trie->charmap);
- PerlMemShared_free(trie->states);
- PerlMemShared_free(trie->trans);
- if (trie->bitmap)
- PerlMemShared_free(trie->bitmap);
- if (trie->wordlen)
- PerlMemShared_free(trie->wordlen);
- if (trie->jump)
- PerlMemShared_free(trie->jump);
- if (trie->nextword)
- PerlMemShared_free(trie->nextword);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- }
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: regfree data code '%c'", ri->data->what[n]);
- }
- }
- Safefree(ri->data->what);
- Safefree(ri->data);
- }
-
- Safefree(ri);
-}
-
-#define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
-#define av_dup_inc(s,t) MUTABLE_AV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define hv_dup_inc(s,t) MUTABLE_HV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define SAVEPVN(p,n) ((p) ? savepvn(p,n) : NULL)
-
-/*
- re_dup - duplicate a regexp.
-
- This routine is expected to clone a given regexp structure. It is only
- compiled under USE_ITHREADS.
-
- After all of the core data stored in struct regexp is duplicated
- the regexp_engine.dupe method is used to copy any private data
- stored in the *pprivate pointer. This allows extensions to handle
- any duplication it needs to do.
-
- See pregfree() and regfree_internal() if you change anything here.
-*/
-#if defined(USE_ITHREADS)
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_re_dup_guts(pTHX_ const REGEXP *sstr, REGEXP *dstr, CLONE_PARAMS *param)
-{
- dVAR;
- I32 npar;
- const struct regexp *r = (const struct regexp *)SvANY(sstr);
- struct regexp *ret = (struct regexp *)SvANY(dstr);
-
- PERL_ARGS_ASSERT_RE_DUP_GUTS;
-
- npar = r->nparens+1;
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if(ret->swap) {
- /* no need to copy these */
- Newx(ret->swap, npar, regexp_paren_pair);
- }
-
- if (ret->substrs) {
- /* Do it this way to avoid reading from *r after the StructCopy().
- That way, if any of the sv_dup_inc()s dislodge *r from the L1
- cache, it doesn't matter. */
- const bool anchored = r->check_substr
- ? r->check_substr == r->anchored_substr
- : r->check_utf8 == r->anchored_utf8;
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- ret->anchored_substr = sv_dup_inc(ret->anchored_substr, param);
- ret->anchored_utf8 = sv_dup_inc(ret->anchored_utf8, param);
- ret->float_substr = sv_dup_inc(ret->float_substr, param);
- ret->float_utf8 = sv_dup_inc(ret->float_utf8, param);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
-
- if (ret->check_substr) {
- if (anchored) {
- assert(r->check_utf8 == r->anchored_utf8);
- ret->check_substr = ret->anchored_substr;
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- assert(r->check_substr == r->float_substr);
- assert(r->check_utf8 == r->float_utf8);
- ret->check_substr = ret->float_substr;
- ret->check_utf8 = ret->float_utf8;
- }
- } else if (ret->check_utf8) {
- if (anchored) {
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- ret->check_utf8 = ret->float_utf8;
- }
- }
- }
-
- RXp_PAREN_NAMES(ret) = hv_dup_inc(RXp_PAREN_NAMES(ret), param);
-
- if (ret->pprivate)
- RXi_SET(ret,CALLREGDUPE_PVT(dstr,param));
-
- if (RX_MATCH_COPIED(dstr))
- ret->subbeg = SAVEPVN(ret->subbeg, ret->sublen);
- else
- ret->subbeg = NULL;
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
-
- ret->mother_re = NULL;
- ret->gofs = 0;
-}
-#endif /* PERL_IN_XSUB_RE */
-
-/*
- regdupe_internal()
-
- This is the internal complement to regdupe() which is used to copy
- the structure pointed to by the *pprivate pointer in the regexp.
- This is the core version of the extension overridable cloning hook.
- The regexp structure being duplicated will be copied by perl prior
- to this and will be provided as the regexp *r argument, however
- with the /old/ structures pprivate pointer value. Thus this routine
- may override any copying normally done by perl.
-
- It returns a pointer to the new regexp_internal structure.
-*/
-
-void *
-Perl_regdupe_internal(pTHX_ REGEXP * const rx, CLONE_PARAMS *param)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- regexp_internal *reti;
- int len, npar;
- RXi_GET_DECL(r,ri);
-
- PERL_ARGS_ASSERT_REGDUPE_INTERNAL;
-
- npar = r->nparens+1;
- len = ProgLen(ri);
-
- Newxc(reti, sizeof(regexp_internal) + len*sizeof(regnode), char, regexp_internal);
- Copy(ri->program, reti->program, len+1, regnode);
-
-
- reti->regstclass = NULL;
-
- if (ri->data) {
- struct reg_data *d;
- const int count = ri->data->count;
- int i;
-
- Newxc(d, sizeof(struct reg_data) + count*sizeof(void *),
- char, struct reg_data);
- Newx(d->what, count, U8);
-
- d->count = count;
- for (i = 0; i < count; i++) {
- d->what[i] = ri->data->what[i];
- switch (d->what[i]) {
- /* legal options are one of: sSfpontTu
- see also regcomp.h and pregfree() */
- case 's':
- case 'S':
- case 'p': /* actually an AV, but the dup function is identical. */
- case 'u': /* actually an HV, but the dup function is identical. */
- d->data[i] = sv_dup_inc((const SV *)ri->data->data[i], param);
- break;
- case 'f':
- /* This is cheating. */
- Newx(d->data[i], 1, struct regnode_charclass_class);
- StructCopy(ri->data->data[i], d->data[i],
- struct regnode_charclass_class);
- reti->regstclass = (regnode*)d->data[i];
- break;
- case 'o':
- /* Compiled op trees are readonly and in shared memory,
- and can thus be shared without duplication. */
- OP_REFCNT_LOCK;
- d->data[i] = (void*)OpREFCNT_inc((OP*)ri->data->data[i]);
- OP_REFCNT_UNLOCK;
- break;
- case 'T':
- /* Trie stclasses are readonly and can thus be shared
- * without duplication. We free the stclass in pregfree
- * when the corresponding reg_ac_data struct is freed.
- */
- reti->regstclass= ri->regstclass;
- /* Fall through */
- case 't':
- OP_REFCNT_LOCK;
- ((reg_trie_data*)ri->data->data[i])->refcount++;
- OP_REFCNT_UNLOCK;
- /* Fall through */
- case 'n':
- d->data[i] = ri->data->data[i];
- break;
- default:
- Perl_croak(aTHX_ "panic: re_dup unknown data code '%c'", ri->data->what[i]);
- }
- }
-
- reti->data = d;
- }
- else
- reti->data = NULL;
-
- reti->name_list_idx = ri->name_list_idx;
-
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets) {
- Newx(reti->u.offsets, 2*len+1, U32);
- Copy(ri->u.offsets, reti->u.offsets, 2*len+1, U32);
- }
-#else
- SetProgLen(reti,len);
-#endif
-
- return (void*)reti;
-}
-
-#endif /* USE_ITHREADS */
-
-#ifndef PERL_IN_XSUB_RE
-
-/*
- - regnext - dig the "next" pointer out of a node
- */
-regnode *
-Perl_regnext(pTHX_ register regnode *p)
-{
- dVAR;
- register I32 offset;
-
- if (!p)
- return(NULL);
-
- offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p));
- if (offset == 0)
- return(NULL);
-
- return(p+offset);
-}
-#endif
-
-STATIC void
-S_re_croak2(pTHX_ const char* pat1,const char* pat2,...)
-{
- va_list args;
- STRLEN l1 = strlen(pat1);
- STRLEN l2 = strlen(pat2);
- char buf[512];
- SV *msv;
- const char *message;
-
- PERL_ARGS_ASSERT_RE_CROAK2;
-
- if (l1 > 510)
- l1 = 510;
- if (l1 + l2 > 510)
- l2 = 510 - l1;
- Copy(pat1, buf, l1 , char);
- Copy(pat2, buf + l1, l2 , char);
- buf[l1 + l2] = '\n';
- buf[l1 + l2 + 1] = '\0';
-#ifdef I_STDARG
- /* ANSI variant takes additional second argument */
- va_start(args, pat2);
-#else
- va_start(args);
-#endif
- msv = vmess(buf, &args);
- va_end(args);
- message = SvPV_const(msv,l1);
- if (l1 > 512)
- l1 = 512;
- Copy(message, buf, l1 , char);
- buf[l1-1] = '\0'; /* Overwrite \n */
- Perl_croak(aTHX_ "%s", buf);
-}
-
-/* XXX Here's a total kludge. But we need to re-enter for swash routines. */
-
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_save_re_context(pTHX)
-{
- dVAR;
-
- struct re_save_state *state;
-
- SAVEVPTR(PL_curcop);
- SSGROW(SAVESTACK_ALLOC_FOR_RE_SAVE_STATE + 1);
-
- state = (struct re_save_state *)(PL_savestack + PL_savestack_ix);
- PL_savestack_ix += SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
- SSPUSHINT(SAVEt_RE_STATE);
-
- Copy(&PL_reg_state, state, 1, struct re_save_state);
-
- PL_reg_start_tmp = 0;
- PL_reg_start_tmpl = 0;
- PL_reg_oldsaved = NULL;
- PL_reg_oldsavedlen = 0;
- PL_reg_maxiter = 0;
- PL_reg_leftiter = 0;
- PL_reg_poscache = NULL;
- PL_reg_poscache_size = 0;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = NULL;
-#endif
-
- /* Save $1..$n (#18107: UTF-8 s/(\w+)/uc($1)/e); AMS 20021106. */
- if (PL_curpm) {
- const REGEXP * const rx = PM_GETRE(PL_curpm);
- if (rx) {
- U32 i;
- for (i = 1; i <= RX_NPARENS(rx); i++) {
- char digits[TYPE_CHARS(long)];
- const STRLEN len = my_snprintf(digits, sizeof(digits), "%lu", (long)i);
- GV *const *const gvp
- = (GV**)hv_fetch(PL_defstash, digits, len, 0);
-
- if (gvp) {
- GV * const gv = *gvp;
- if (SvTYPE(gv) == SVt_PVGV && GvSV(gv))
- save_scalar(gv);
- }
- }
- }
- }
-}
-#endif
-
-static void
-clear_re(pTHX_ void *r)
-{
- dVAR;
- ReREFCNT_dec((REGEXP *)r);
-}
-
-#ifdef DEBUGGING
-
-STATIC void
-S_put_byte(pTHX_ SV *sv, int c)
-{
- PERL_ARGS_ASSERT_PUT_BYTE;
-
- /* Our definition of isPRINT() ignores locales, so only bytes that are
- not part of UTF-8 are considered printable. I assume that the same
- holds for UTF-EBCDIC.
- Also, code point 255 is not printable in either (it's E0 in EBCDIC,
- which Wikipedia says:
-
- EO, or Eight Ones, is an 8-bit EBCDIC character code represented as all
- ones (binary 1111 1111, hexadecimal FF). It is similar, but not
- identical, to the ASCII delete (DEL) or rubout control character.
- ) So the old condition can be simplified to !isPRINT(c) */
- if (!isPRINT(c))
- Perl_sv_catpvf(aTHX_ sv, "\\%o", c);
- else {
- const char string = c;
- if (c == '-' || c == ']' || c == '\\' || c == '^')
- sv_catpvs(sv, "\\");
- sv_catpvn(sv, &string, 1);
- }
-}
-
-
-#define CLEAR_OPTSTART \
- if (optstart) STMT_START { \
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log, " (%"IVdf" nodes)\n", (IV)(node - optstart))); \
- optstart=NULL; \
- } STMT_END
-
-#define DUMPUNTIL(b,e) CLEAR_OPTSTART; node=dumpuntil(r,start,(b),(e),last,sv,indent+1,depth+1);
-
-STATIC const regnode *
-S_dumpuntil(pTHX_ const regexp *r, const regnode *start, const regnode *node,
- const regnode *last, const regnode *plast,
- SV* sv, I32 indent, U32 depth)
-{
- dVAR;
- register U8 op = PSEUDO; /* Arbitrary non-END op. */
- register const regnode *next;
- const regnode *optstart= NULL;
-
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMPUNTIL;
-
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d : %d - %d - %d\n",indent,node-start,
- last ? last-start : 0,plast ? plast-start : 0);
-#endif
-
- if (plast && plast < last)
- last= plast;
-
- while (PL_regkind[op] != END && (!last || node < last)) {
- /* While that wasn't END last time... */
- NODE_ALIGN(node);
- op = OP(node);
- if (op == CLOSE || op == WHILEM)
- indent--;
- next = regnext((regnode *)node);
-
- /* Where, what. */
- if (OP(node) == OPTIMIZED) {
- if (!optstart && RE_DEBUG_FLAG(RE_DEBUG_COMPILE_OPTIMISE))
- optstart = node;
- else
- goto after_print;
- } else
- CLEAR_OPTSTART;
-
- regprop(r, sv, node);
- PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start),
- (int)(2*indent + 1), "", SvPVX_const(sv));
-
- if (OP(node) != OPTIMIZED) {
- if (next == NULL) /* Next ptr. */
- PerlIO_printf(Perl_debug_log, " (0)");
- else if (PL_regkind[(U8)op] == BRANCH && PL_regkind[OP(next)] != BRANCH )
- PerlIO_printf(Perl_debug_log, " (FAIL)");
- else
- PerlIO_printf(Perl_debug_log, " (%"IVdf")", (IV)(next - start));
- (void)PerlIO_putc(Perl_debug_log, '\n');
- }
-
- after_print:
- if (PL_regkind[(U8)op] == BRANCHJ) {
- assert(next);
- {
- register const regnode *nnode = (OP(next) == LONGJMP
- ? regnext((regnode *)next)
- : next);
- if (last && nnode > last)
- nnode = last;
- DUMPUNTIL(NEXTOPER(NEXTOPER(node)), nnode);
- }
- }
- else if (PL_regkind[(U8)op] == BRANCH) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node), next);
- }
- else if ( PL_regkind[(U8)op] == TRIE ) {
- const regnode *this_trie = node;
- const char op = OP(node);
- const U32 n = ARG(node);
- const reg_ac_data * const ac = op>=AHOCORASICK ?
- (reg_ac_data *)ri->data->data[n] :
- NULL;
- const reg_trie_data * const trie =
- (reg_trie_data*)ri->data->data[op<AHOCORASICK ? n : ac->trie];
-#ifdef DEBUGGING
- AV *const trie_words = MUTABLE_AV(ri->data->data[n + TRIE_WORDS_OFFSET]);
-#endif
- const regnode *nextbranch= NULL;
- I32 word_idx;
- sv_setpvs(sv, "");
- for (word_idx= 0; word_idx < (I32)trie->wordcount; word_idx++) {
- SV ** const elem_ptr = av_fetch(trie_words,word_idx,0);
-
- PerlIO_printf(Perl_debug_log, "%*s%s ",
- (int)(2*(indent+3)), "",
- elem_ptr ? pv_pretty(sv, SvPV_nolen_const(*elem_ptr), SvCUR(*elem_ptr), 60,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*elem_ptr) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT
- )
- : "???"
- );
- if (trie->jump) {
- U16 dist= trie->jump[word_idx+1];
- PerlIO_printf(Perl_debug_log, "(%"UVuf")\n",
- (UV)((dist ? this_trie + dist : next) - start));
- if (dist) {
- if (!nextbranch)
- nextbranch= this_trie + trie->jump[0];
- DUMPUNTIL(this_trie + dist, nextbranch);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode *)nextbranch);
- } else {
- PerlIO_printf(Perl_debug_log, "\n");
- }
- }
- if (last && next > last)
- node= last;
- else
- node= next;
- }
- else if ( op == CURLY ) { /* "next" might be very big: optimizer */
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS,
- NEXTOPER(node) + EXTRA_STEP_2ARGS + 1);
- }
- else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, next);
- }
- else if ( op == PLUS || op == STAR) {
- DUMPUNTIL(NEXTOPER(node), NEXTOPER(node) + 1);
- }
- else if (op == ANYOF) {
- /* arglen 1 + class block */
- node += 1 + ((ANYOF_FLAGS(node) & ANYOF_LARGE)
- ? ANYOF_CLASS_SKIP : ANYOF_SKIP);
- node = NEXTOPER(node);
- }
- else if (PL_regkind[(U8)op] == EXACT) {
- /* Literal string, where present. */
- node += NODE_SZ_STR(node) - 1;
- node = NEXTOPER(node);
- }
- else {
- node = NEXTOPER(node);
- node += regarglen[(U8)op];
- }
- if (op == CURLYX || op == OPEN)
- indent++;
- }
- CLEAR_OPTSTART;
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d\n", (int)indent);
-#endif
- return node;
-}
-
-#endif /* DEBUGGING */
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regexec.c
- */
-
-/*
- * One Ring to rule them all, One Ring to find them
- &
- * [p.v of _The Lord of the Rings_, opening poem]
- * [p.50 of _The Lord of the Rings_, I/iii: "The Shadow of the Past"]
- * [p.254 of _The Lord of the Rings_, II/ii: "The Council of Elrond"]
- */
-
-/* This file contains functions for executing a regular expression. See
- * also regcomp.c which funnily enough, contains functions for compiling
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_exec.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGEXEC_C
-#include "perl.h"
-
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#define RF_tainted 1 /* tainted information used? */
-#define RF_warned 2 /* warned about big count? */
-
-#define RF_utf8 8 /* Pattern contains multibyte chars? */
-
-#define UTF ((PL_reg_flags & RF_utf8) != 0)
-
-#define RS_init 1 /* eval environment created */
-#define RS_set 2 /* replsv value is set */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-#define REGINCLASS(prog,p,c) (ANYOF_FLAGS(p) ? reginclass(prog,p,c,0,0) : ANYOF_BITMAP_TEST(p,*(c)))
-
-/*
- * Forwards.
- */
-
-#define CHR_SVLEN(sv) (do_utf8 ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (PL_reg_match_utf8 ? utf8_distance(a,b) : a - b)
-
-#define HOPc(pos,off) \
- (char *)(PL_reg_match_utf8 \
- ? reghop3((U8*)pos, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)) \
- : (U8*)(pos + off))
-#define HOPBACKc(pos, off) \
- (char*)(PL_reg_match_utf8\
- ? reghopmaybe3((U8*)pos, -off, (U8*)PL_bostr) \
- : (pos - off >= PL_bostr) \
- ? (U8*)pos - off \
- : NULL)
-
-#define HOP3(pos,off,lim) (PL_reg_match_utf8 ? reghop3((U8*)(pos), off, (U8*)(lim)) : (U8*)(pos + off))
-#define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim))
-
-/* these are unrolled below in the CCC_TRY_XXX defined */
-#define LOAD_UTF8_CHARCLASS(class,str) STMT_START { \
- if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)str); assert(ok); LEAVE; } } STMT_END
-#define LOAD_UTF8_CHARCLASS_ALNUM() LOAD_UTF8_CHARCLASS(alnum,"a")
-#define LOAD_UTF8_CHARCLASS_DIGIT() LOAD_UTF8_CHARCLASS(digit,"0")
-#define LOAD_UTF8_CHARCLASS_SPACE() LOAD_UTF8_CHARCLASS(space," ")
-#define LOAD_UTF8_CHARCLASS_MARK() LOAD_UTF8_CHARCLASS(mark, "\xcd\x86")
-
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS_ALNUM()
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS_SPACE()
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS_DIGIT()
-#define RE_utf8_perl_word PL_utf8_alnum
-#define RE_utf8_perl_space PL_utf8_space
-#define RE_utf8_posix_digit PL_utf8_digit
-#define perl_word alnum
-#define perl_space space
-#define posix_digit digit
-#else
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS(perl_word,"a")
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS(perl_space," ")
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS(posix_digit,"0")
-#define RE_utf8_perl_word PL_utf8_perl_word
-#define RE_utf8_perl_space PL_utf8_perl_space
-#define RE_utf8_posix_digit PL_utf8_posix_digit
-#endif
-
-
-#define CCC_TRY_AFF(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME: \
- if (!nextchr) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if (!(OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if (!(OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-#define CCC_TRY_NEG(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME : \
- if (!nextchr && locinput >= PL_regeol) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if ((OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if ((OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-
-
-
-
-/* TODO: Combine JUMPABLE and HAS_TEXT to cache OP(rn) */
-
-/* for use after a quantifier and before an EXACT-like node -- japhy */
-/* it would be nice to rework regcomp.sym to generate this stuff. sigh */
-#define JUMPABLE(rn) ( \
- OP(rn) == OPEN || \
- (OP(rn) == CLOSE && (!cur_eval || cur_eval->u.eval.close_paren != ARG(rn))) || \
- OP(rn) == EVAL || \
- OP(rn) == SUSPEND || OP(rn) == IFMATCH || \
- OP(rn) == PLUS || OP(rn) == MINMOD || \
- OP(rn) == KEEPS || (PL_regkind[OP(rn)] == VERB) || \
- (PL_regkind[OP(rn)] == CURLY && ARG1(rn) > 0) \
-)
-#define IS_EXACT(rn) (PL_regkind[OP(rn)] == EXACT)
-
-#define HAS_TEXT(rn) ( IS_EXACT(rn) || PL_regkind[OP(rn)] == REF )
-
-#if 0
-/* Currently these are only used when PL_regkind[OP(rn)] == EXACT so
- we don't need this definition. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT || OP(rn)==REF || OP(rn)==NREF )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF || OP(rn)==REFF || OP(rn)==NREFF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL || OP(rn)==REFFL || OP(rn)==NREFFL )
-
-#else
-/* ... so we use this as its faster. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL )
-
-#endif
-
-/*
- Search for mandatory following text node; for lookahead, the text must
- follow but for lookbehind (rn->flags != 0) we skip to the next step.
-*/
-#define FIND_NEXT_IMPT(rn) STMT_START { \
- while (JUMPABLE(rn)) { \
- const OPCODE type = OP(rn); \
- if (type == SUSPEND || PL_regkind[type] == CURLY) \
- rn = NEXTOPER(NEXTOPER(rn)); \
- else if (type == PLUS) \
- rn = NEXTOPER(rn); \
- else if (type == IFMATCH) \
- rn = (rn->flags == 0) ? NEXTOPER(NEXTOPER(rn)) : rn + ARG(rn); \
- else rn += NEXT_OFF(rn); \
- } \
-} STMT_END
-
-
-static void restore_pos(pTHX_ void *arg);
-
-STATIC CHECKPOINT
-S_regcppush(pTHX_ I32 parenfloor)
-{
- dVAR;
- const int retval = PL_savestack_ix;
-#define REGCP_PAREN_ELEMS 4
- const int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS;
- int p;
- GET_RE_DEBUG_FLAGS_DECL;
-
- if (paren_elems_to_push < 0)
- Perl_croak(aTHX_ "panic: paren_elems_to_push < 0");
-
-#define REGCP_OTHER_ELEMS 7
- SSGROW(paren_elems_to_push + REGCP_OTHER_ELEMS);
-
- for (p = PL_regsize; p > parenfloor; p--) {
-/* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */
- SSPUSHINT(PL_regoffs[p].end);
- SSPUSHINT(PL_regoffs[p].start);
- SSPUSHPTR(PL_reg_start_tmp[p]);
- SSPUSHINT(p);
- DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log,
- " saving \\%"UVuf" %"IVdf"(%"IVdf")..%"IVdf"\n",
- (UV)p, (IV)PL_regoffs[p].start,
- (IV)(PL_reg_start_tmp[p] - PL_bostr),
- (IV)PL_regoffs[p].end
- ));
- }
-/* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */
- SSPUSHPTR(PL_regoffs);
- SSPUSHINT(PL_regsize);
- SSPUSHINT(*PL_reglastparen);
- SSPUSHINT(*PL_reglastcloseparen);
- SSPUSHPTR(PL_reginput);
-#define REGCP_FRAME_ELEMS 2
-/* REGCP_FRAME_ELEMS are part of the REGCP_OTHER_ELEMS and
- * are needed for the regexp context stack bookkeeping. */
- SSPUSHINT(paren_elems_to_push + REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- SSPUSHINT(SAVEt_REGCONTEXT); /* Magic cookie. */
-
- return retval;
-}
-
-/* These are needed since we do not localize EVAL nodes: */
-#define REGCP_SET(cp) \
- DEBUG_STATE_r( \
- PerlIO_printf(Perl_debug_log, \
- " Setting an EVAL scope, savestack=%"IVdf"\n", \
- (IV)PL_savestack_ix)); \
- cp = PL_savestack_ix
-
-#define REGCP_UNWIND(cp) \
- DEBUG_STATE_r( \
- if (cp != PL_savestack_ix) \
- PerlIO_printf(Perl_debug_log, \
- " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \
- (IV)(cp), (IV)PL_savestack_ix)); \
- regcpblow(cp)
-
-STATIC char *
-S_regcppop(pTHX_ const regexp *rex)
-{
- dVAR;
- U32 i;
- char *input;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCPPOP;
-
- /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */
- i = SSPOPINT;
- assert(i == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */
- i = SSPOPINT; /* Parentheses elements to pop. */
- input = (char *) SSPOPPTR;
- *PL_reglastcloseparen = SSPOPINT;
- *PL_reglastparen = SSPOPINT;
- PL_regsize = SSPOPINT;
- PL_regoffs=(regexp_paren_pair *) SSPOPPTR;
-
-
- /* Now restore the parentheses context. */
- for (i -= (REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- i > 0; i -= REGCP_PAREN_ELEMS) {
- I32 tmps;
- U32 paren = (U32)SSPOPINT;
- PL_reg_start_tmp[paren] = (char *) SSPOPPTR;
- PL_regoffs[paren].start = SSPOPINT;
- tmps = SSPOPINT;
- if (paren <= *PL_reglastparen)
- PL_regoffs[paren].end = tmps;
- DEBUG_BUFFERS_r(
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n",
- (UV)paren, (IV)PL_regoffs[paren].start,
- (IV)(PL_reg_start_tmp[paren] - PL_bostr),
- (IV)PL_regoffs[paren].end,
- (paren > *PL_reglastparen ? "(no)" : ""));
- );
- }
- DEBUG_BUFFERS_r(
- if (*PL_reglastparen + 1 <= rex->nparens) {
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"IVdf"..\\%"IVdf" to undef\n",
- (IV)(*PL_reglastparen + 1), (IV)rex->nparens);
- }
- );
-#if 1
- /* It would seem that the similar code in regtry()
- * already takes care of this, and in fact it is in
- * a better location to since this code can #if 0-ed out
- * but the code in regtry() is needed or otherwise tests
- * requiring null fields (pat.t#187 and split.t#{13,14}
- * (as of patchlevel 7877) will fail. Then again,
- * this code seems to be necessary or otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * --jhi updated by dapm */
- for (i = *PL_reglastparen + 1; i <= rex->nparens; i++) {
- if (i > PL_regsize)
- PL_regoffs[i].start = -1;
- PL_regoffs[i].end = -1;
- }
-#endif
- return input;
-}
-
-#define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */
-
-/*
- * pregexec and friends
- */
-
-#ifndef PERL_IN_XSUB_RE
-/*
- - pregexec - match a regexp against a string
- */
-I32
-Perl_pregexec(pTHX_ REGEXP * const prog, char* stringarg, register char *strend,
- char *strbeg, I32 minend, SV *screamer, U32 nosave)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* nosave: For optimizations. */
-{
- PERL_ARGS_ASSERT_PREGEXEC;
-
- return
- regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL,
- nosave ? 0 : REXEC_COPY_STR);
-}
-#endif
-
-/*
- * Need to implement the following flags for reg_anch:
- *
- * USE_INTUIT_NOML - Useful to call re_intuit_start() first
- * USE_INTUIT_ML
- * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer
- * INTUIT_AUTORITATIVE_ML
- * INTUIT_ONCE_NOML - Intuit can match in one location only.
- * INTUIT_ONCE_ML
- *
- * Another flag for this function: SECOND_TIME (so that float substrs
- * with giant delta may be not rechecked).
- */
-
-/* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */
-
-/* If SCREAM, then SvPVX_const(sv) should be compatible with strpos and strend.
- Otherwise, only SvCUR(sv) is used to get strbeg. */
-
-/* XXXX We assume that strpos is strbeg unless sv. */
-
-/* XXXX Some places assume that there is a fixed substring.
- An update may be needed if optimizer marks as "INTUITable"
- RExen without fixed substrings. Similarly, it is assumed that
- lengths of all the strings are no more than minlen, thus they
- cannot come from lookahead.
- (Or minlen should take into account lookahead.)
- NOTE: Some of this comment is not correct. minlen does now take account
- of lookahead/behind. Further research is required. -- demerphq
-
-*/
-
-/* A failure to find a constant substring means that there is no need to make
- an expensive call to REx engine, thus we celebrate a failure. Similarly,
- finding a substring too deep into the string means that less calls to
- regtry() should be needed.
-
- REx compiler's optimizer found 4 possible hints:
- a) Anchored substring;
- b) Fixed substring;
- c) Whether we are anchored (beginning-of-line or \G);
- d) First node (of those at offset 0) which may distingush positions;
- We use a)b)d) and multiline-part of c), and try to find a position in the
- string which does not contradict any of them.
- */
-
-/* Most of decisions we do here should have been done at compile time.
- The nodes of the REx which we used for the search should have been
- deleted from the finite automaton. */
-
-char *
-Perl_re_intuit_start(pTHX_ REGEXP * const rx, SV *sv, char *strpos,
- char *strend, const U32 flags, re_scream_pos_data *data)
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- register I32 start_shift = 0;
- /* Should be nonnegative! */
- register I32 end_shift = 0;
- register char *s;
- register SV *check;
- char *strbeg;
- char *t;
- const bool do_utf8 = (sv && SvUTF8(sv)) ? 1 : 0; /* if no sv we have to assume bytes */
- I32 ml_anch;
- register char *other_last = NULL; /* other substr checked before this */
- char *check_at = NULL; /* check substr found at this pos */
- const I32 multiline = prog->extflags & RXf_PMf_MULTILINE;
- RXi_GET_DECL(prog,progi);
-#ifdef DEBUGGING
- const char * const i_strpos = strpos;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_START;
-
- RX_MATCH_UTF8_set(rx,do_utf8);
-
- if (RX_UTF8(rx)) {
- PL_reg_flags |= RF_utf8;
- }
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, strpos, strend,
- sv ? "Guessing start of match in sv for"
- : "Guessing start of match in string for");
- );
-
- /* CHR_DIST() would be more correct here but it makes things slow. */
- if (prog->minlen > strend - strpos) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short... [re_intuit_start]\n"));
- goto fail;
- }
-
- strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos;
- PL_regeol = strend;
- if (do_utf8) {
- if (!prog->check_utf8 && prog->check_substr)
- to_utf8_substr(prog);
- check = prog->check_utf8;
- } else {
- if (!prog->check_substr && prog->check_utf8)
- to_byte_substr(prog);
- check = prog->check_substr;
- }
- if (check == &PL_sv_undef) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Non-utf8 string cannot match utf8 check string\n"));
- goto fail;
- }
- if (prog->extflags & RXf_ANCH) { /* Match at beg-of-str or after \n */
- ml_anch = !( (prog->extflags & RXf_ANCH_SINGLE)
- || ( (prog->extflags & RXf_ANCH_BOL)
- && !multiline ) ); /* Check after \n? */
-
- if (!ml_anch) {
- if ( !(prog->extflags & RXf_ANCH_GPOS) /* Checked by the caller */
- && !(prog->intflags & PREGf_IMPLICIT) /* not a real BOL */
- /* SvCUR is not set on references: SvRV and SvPVX_const overlap */
- && sv && !SvROK(sv)
- && (strpos != strbeg)) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not at start...\n"));
- goto fail;
- }
- if (prog->check_offset_min == prog->check_offset_max &&
- !(prog->extflags & RXf_CANY_SEEN)) {
- /* Substring at constant offset from beg-of-str... */
- I32 slen;
-
- s = HOP3c(strpos, prog->check_offset_min, strend);
-
- if (SvTAIL(check)) {
- slen = SvCUR(check); /* >= 1 */
-
- if ( strend - s > slen || strend - s < slen - 1
- || (strend - s == slen && strend[-1] != '\n')) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String too long...\n"));
- goto fail_finish;
- }
- /* Now should match s[0..slen-2] */
- slen--;
- if (slen && (*SvPVX_const(check) != *s
- || (slen > 1
- && memNE(SvPVX_const(check), s, slen)))) {
- report_neq:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String not equal...\n"));
- goto fail_finish;
- }
- }
- else if (*SvPVX_const(check) != *s
- || ((slen = SvCUR(check)) > 1
- && memNE(SvPVX_const(check), s, slen)))
- goto report_neq;
- check_at = s;
- goto success_at_start;
- }
- }
- /* Match is anchored, but substr is not anchored wrt beg-of-str. */
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- if (!ml_anch) {
- const I32 end = prog->check_offset_max + CHR_SVLEN(check)
- - (SvTAIL(check) != 0);
- const I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end;
-
- if (end_shift < eshift)
- end_shift = eshift;
- }
- }
- else { /* Can match at random position */
- ml_anch = 0;
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- /* end shift should be non negative here */
- }
-
-#ifdef QDEBUGGING /* 7/99: reports of failure (with the older version) */
- if (end_shift < 0)
- Perl_croak(aTHX_ "panic: end_shift: %"IVdf" pattern:\n%s\n ",
- (IV)end_shift, RX_PRECOMP(prog));
-#endif
-
- restart:
- /* Find a possible match in the region s..strend by looking for
- the "check" substring in the region corrected by start/end_shift. */
-
- {
- I32 srch_start_shift = start_shift;
- I32 srch_end_shift = end_shift;
- if (srch_start_shift < 0 && strbeg - s > srch_start_shift) {
- srch_end_shift -= ((strbeg - s) - srch_start_shift);
- srch_start_shift = strbeg - s;
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "Check offset min: %"IVdf" Start shift: %"IVdf" End shift %"IVdf" Real End Shift: %"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)srch_start_shift,
- (IV)srch_end_shift,
- (IV)prog->check_end_shift);
- });
-
- if (flags & REXEC_SCREAM) {
- I32 p = -1; /* Internal iterator of scream. */
- I32 * const pp = data ? data->scream_pos : &p;
-
- if (PL_screamfirst[BmRARE(check)] >= 0
- || ( BmRARE(check) == '\n'
- && (BmPREVIOUS(check) == SvCUR(check) - 1)
- && SvTAIL(check) ))
- s = screaminstr(sv, check,
- srch_start_shift + (s - strbeg), srch_end_shift, pp, 0);
- else
- goto fail_finish;
- /* we may be pointing at the wrong string */
- if (s && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- if (data)
- *data->scream_olds = s;
- }
- else {
- U8* start_point;
- U8* end_point;
- if (prog->extflags & RXf_CANY_SEEN) {
- start_point= (U8*)(s + srch_start_shift);
- end_point= (U8*)(strend - srch_end_shift);
- } else {
- start_point= HOP3(s, srch_start_shift, srch_start_shift < 0 ? strbeg : strend);
- end_point= HOP3(strend, -srch_end_shift, strbeg);
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "fbm_instr len=%d str=<%.*s>\n",
- (int)(end_point - start_point),
- (int)(end_point - start_point) > 20 ? 20 : (int)(end_point - start_point),
- start_point);
- });
-
- s = fbm_instr( start_point, end_point,
- check, multiline ? FBMrf_MULTILINE : 0);
- }
- }
- /* Update the count-of-usability, remove useless subpatterns,
- unshift s. */
-
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(check), RE_SV_DUMPLEN(check), 30);
- PerlIO_printf(Perl_debug_log, "%s %s substr %s%s%s",
- (s ? "Found" : "Did not find"),
- (check == (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)
- ? "anchored" : "floating"),
- quoted,
- RE_SV_TAIL(check),
- (s ? " at offset " : "...\n") );
- });
-
- if (!s)
- goto fail_finish;
- /* Finish the diagnostic message */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) );
-
- /* XXX dmq: first branch is for positive lookbehind...
- Our check string is offset from the beginning of the pattern.
- So we need to do any stclass tests offset forward from that
- point. I think. :-(
- */
-
-
-
- check_at=s;
-
-
- /* Got a candidate. Check MBOL anchoring, and the *other* substr.
- Start with the other substr.
- XXXX no SCREAM optimization yet - and a very coarse implementation
- XXXX /ttx+/ results in anchored="ttx", floating="x". floating will
- *always* match. Probably should be marked during compile...
- Probably it is right to do no SCREAM here...
- */
-
- if (do_utf8 ? (prog->float_utf8 && prog->anchored_utf8)
- : (prog->float_substr && prog->anchored_substr))
- {
- /* Take into account the "other" substring. */
- /* XXXX May be hopelessly wrong for UTF... */
- if (!other_last)
- other_last = strpos;
- if (check == (do_utf8 ? prog->float_utf8 : prog->float_substr)) {
- do_other_anchored:
- {
- char * const last = HOP3c(s, -start_shift, strbeg);
- char *last1, *last2;
- char * const saved_s = s;
- SV* must;
-
- t = s - prog->check_offset_max;
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -(prog->check_offset_max), (U8*)strpos))
- && t > strpos)))
- NOOP;
- else
- t = strpos;
- t = HOP3c(t, prog->anchored_offset, strend);
- if (t < other_last) /* These positions already checked */
- t = other_last;
- last2 = last1 = HOP3c(strend, -prog->minlen, strbeg);
- if (last < last1)
- last1 = last;
- /* XXXX It is not documented what units *_offsets are in.
- We assume bytes, but this is clearly wrong.
- Meaning this code needs to be carefully reviewed for errors.
- dmq.
- */
-
- /* On end-of-str: see comment below. */
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->anchored_utf8); /* for debug */
- }
- else
- s = fbm_instr(
- (unsigned char*)t,
- HOP3(HOP3(last1, prog->anchored_offset, strend)
- + SvCUR(must), -(SvTAIL(must)!=0), strbeg),
- must,
- multiline ? FBMrf_MULTILINE : 0
- );
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s anchored substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
-
-
- if (!s) {
- if (last1 >= last2) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying floating at offset %ld...\n",
- (long)(HOP3c(saved_s, 1, strend) - i_strpos)));
- other_last = HOP3c(last1, prog->anchored_offset+1, strend);
- s = HOP3c(last, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- t = HOP3c(s, -prog->anchored_offset, strbeg);
- other_last = HOP3c(s, 1, strend);
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
- else { /* Take into account the floating substring. */
- char *last, *last1;
- char * const saved_s = s;
- SV* must;
-
- t = HOP3c(s, -start_shift, strbeg);
- last1 = last =
- HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg);
- if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset)
- last = HOP3c(t, prog->float_max_offset, strend);
- s = HOP3c(t, prog->float_min_offset, strend);
- if (s < other_last)
- s = other_last;
- /* XXXX It is not documented what units *_offsets are in. Assume bytes. */
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- /* fbm_instr() takes into account exact value of end-of-str
- if the check is SvTAIL(ed). Since false positives are OK,
- and end-of-str is not later than strend we are OK. */
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->float_utf8); /* for debug message */
- }
- else
- s = fbm_instr((unsigned char*)s,
- (unsigned char*)last + SvCUR(must)
- - (SvTAIL(must)!=0),
- must, multiline ? FBMrf_MULTILINE : 0);
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s floating substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
- if (!s) {
- if (last1 == last) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying anchored starting at offset %ld...\n",
- (long)(saved_s + 1 - i_strpos)));
- other_last = last;
- s = HOP3c(t, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- other_last = s; /* Fix this later. --Hugo */
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
-
-
- t= (char*)HOP3( s, -prog->check_offset_max, (prog->check_offset_max<0) ? strend : strpos);
-
- DEBUG_OPTIMISE_MORE_r(
- PerlIO_printf(Perl_debug_log,
- "Check offset min:%"IVdf" max:%"IVdf" S:%"IVdf" t:%"IVdf" D:%"IVdf" end:%"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)prog->check_offset_max,
- (IV)(s-strpos),
- (IV)(t-strpos),
- (IV)(t-s),
- (IV)(strend-strpos)
- )
- );
-
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -prog->check_offset_max, (U8*) ((prog->check_offset_max<0) ? strend : strpos)))
- && t > strpos)))
- {
- /* Fixed substring is found far enough so that the match
- cannot start at strpos. */
- try_at_offset:
- if (ml_anch && t[-1] != '\n') {
- /* Eventually fbm_*() should handle this, but often
- anchored_offset is not 0, so this check will not be wasted. */
- /* XXXX In the code below we prefer to look for "^" even in
- presence of anchored substrings. And we search even
- beyond the found float position. These pessimizations
- are historical artefacts only. */
- find_anchor:
- while (t < strend - prog->minlen) {
- if (*t == '\n') {
- if (t < check_at - prog->check_offset_min) {
- if (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) {
- /* Since we moved from the found position,
- we definitely contradict the found anchored
- substr. Due to the above check we do not
- contradict "check" substr.
- Thus we can arrive here only if check substr
- is float. Redo checking for "other"=="fixed".
- */
- strpos = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset)));
- goto do_other_anchored;
- }
- /* We don't contradict the found floating substring. */
- /* XXXX Why not check for STCLASS? */
- s = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(s - i_strpos)));
- goto set_useful;
- }
- /* Position contradicts check-string */
- /* XXXX probably better to look for check-string
- than for "\n", so one should lower the limit for t? */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t + 1 - i_strpos)));
- other_last = strpos = s = t + 1;
- goto restart;
- }
- t++;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- goto fail_finish;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- }
- s = t;
- set_useful:
- ++BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr); /* hooray/5 */
- }
- else {
- /* The found string does not prohibit matching at strpos,
- - no optimization of calling REx engine can be performed,
- unless it was an MBOL and we are not after MBOL,
- or a future STCLASS check will fail this. */
- try_at_start:
- /* Even in this situation we may use MBOL flag if strpos is offset
- wrt the start of the string. */
- if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */
- && (strpos != strbeg) && strpos[-1] != '\n'
- /* May be due to an implicit anchor of m{.*foo} */
- && !(prog->intflags & PREGf_IMPLICIT))
- {
- t = strpos;
- goto find_anchor;
- }
- DEBUG_EXECUTE_r( if (ml_anch)
- PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n",
- (long)(strpos - i_strpos), PL_colors[0], PL_colors[1]);
- );
- success_at_start:
- if (!(prog->intflags & PREGf_NAUGHTY) /* XXXX If strpos moved? */
- && (do_utf8 ? (
- prog->check_utf8 /* Could be deleted already */
- && --BmUSEFUL(prog->check_utf8) < 0
- && (prog->check_utf8 == prog->float_utf8)
- ) : (
- prog->check_substr /* Could be deleted already */
- && --BmUSEFUL(prog->check_substr) < 0
- && (prog->check_substr == prog->float_substr)
- )))
- {
- /* If flags & SOMETHING - do not do it many times on the same match */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n"));
- /* XXX Does the destruction order has to change with do_utf8? */
- SvREFCNT_dec(do_utf8 ? prog->check_utf8 : prog->check_substr);
- SvREFCNT_dec(do_utf8 ? prog->check_substr : prog->check_utf8);
- prog->check_substr = prog->check_utf8 = NULL; /* disable */
- prog->float_substr = prog->float_utf8 = NULL; /* clear */
- check = NULL; /* abort */
- s = strpos;
- /* XXXX This is a remnant of the old implementation. It
- looks wasteful, since now INTUIT can use many
- other heuristics. */
- prog->extflags &= ~RXf_USE_INTUIT;
- }
- else
- s = strpos;
- }
-
- /* Last resort... */
- /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */
- /* trie stclasses are too expensive to use here, we are better off to
- leave it to regmatch itself */
- if (progi->regstclass && PL_regkind[OP(progi->regstclass)]!=TRIE) {
- /* minlen == 0 is possible if regstclass is \b or \B,
- and the fixed substr is ''$.
- Since minlen is already taken into account, s+1 is before strend;
- accidentally, minlen >= 1 guaranties no false positives at s + 1
- even for \b or \B. But (minlen? 1 : 0) below assumes that
- regstclass does not come from lookahead... */
- /* If regstclass takes bytelength more than 1: If charlength==1, OK.
- This leaves EXACTF only, which is dealt with in find_byclass(). */
- const U8* const str = (U8*)STRING(progi->regstclass);
- const int cl_l = (PL_regkind[OP(progi->regstclass)] == EXACT
- ? CHR_DIST(str+STR_LEN(progi->regstclass), str)
- : 1);
- char * endpos;
- if (prog->anchored_substr || prog->anchored_utf8 || ml_anch)
- endpos= HOP3c(s, (prog->minlen ? cl_l : 0), strend);
- else if (prog->float_substr || prog->float_utf8)
- endpos= HOP3c(HOP3c(check_at, -start_shift, strbeg), cl_l, strend);
- else
- endpos= strend;
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %"IVdf" s: %"IVdf" endpos: %"IVdf"\n",
- (IV)start_shift, (IV)(check_at - strbeg), (IV)(s - strbeg), (IV)(endpos - strbeg)));
-
- t = s;
- s = find_byclass(prog, progi->regstclass, s, endpos, NULL);
- if (!s) {
-#ifdef DEBUGGING
- const char *what = NULL;
-#endif
- if (endpos == strend) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "This position contradicts STCLASS...\n") );
- if ((prog->extflags & RXf_ANCH) && !ml_anch)
- goto fail;
- /* Contradict one of substrings */
- if (prog->anchored_substr || prog->anchored_utf8) {
- if ((do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) == check) {
- DEBUG_EXECUTE_r( what = "anchored" );
- hop_and_restart:
- s = HOP3c(t, 1, strend);
- if (s + start_shift + end_shift > strend) {
- /* XXXX Should be taken into account earlier? */
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for %s substr starting at offset %ld...\n",
- what, (long)(s + start_shift - i_strpos)) );
- goto restart;
- }
- /* Have both, check_string is floating */
- if (t + start_shift >= check_at) /* Contradicts floating=check */
- goto retry_floating_check;
- /* Recheck anchored substring, but not floating... */
- s = check_at;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for anchored substr starting at offset %ld...\n",
- (long)(other_last - i_strpos)) );
- goto do_other_anchored;
- }
- /* Another way we could have checked stclass at the
- current position only: */
- if (ml_anch) {
- s = t = t + 1;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for /%s^%s/m starting at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t - i_strpos)) );
- goto try_at_offset;
- }
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) /* Could have been deleted */
- goto fail;
- /* Check is floating subtring. */
- retry_floating_check:
- t = check_at - start_shift;
- DEBUG_EXECUTE_r( what = "floating" );
- goto hop_and_restart;
- }
- if (t != s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "By STCLASS: moving %ld --> %ld\n",
- (long)(t - i_strpos), (long)(s - i_strpos))
- );
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Does not contradict STCLASS...\n");
- );
- }
- }
- giveup:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n",
- PL_colors[4], (check ? "Guessed" : "Giving up"),
- PL_colors[5], (long)(s - i_strpos)) );
- return s;
-
- fail_finish: /* Substring not found */
- if (prog->check_substr || prog->check_utf8) /* could be removed already */
- BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr) += 5; /* hooray */
- fail:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n",
- PL_colors[4], PL_colors[5]));
- return NULL;
-}
-
-#define DECL_TRIE_TYPE(scan) \
- const enum { trie_plain, trie_utf8, trie_utf8_fold, trie_latin_utf8_fold } \
- trie_type = (scan->flags != EXACT) \
- ? (do_utf8 ? trie_utf8_fold : (UTF ? trie_latin_utf8_fold : trie_plain)) \
- : (do_utf8 ? trie_utf8 : trie_plain)
-
-#define REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, uscan, len, \
-uvc, charid, foldlen, foldbuf, uniflags) STMT_START { \
- switch (trie_type) { \
- case trie_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_latin_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- len = 1; \
- uvc = to_uni_fold( *(U8*)uc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_utf8: \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- break; \
- case trie_plain: \
- uvc = (UV)*uc; \
- len = 1; \
- } \
- if (uvc < 256) { \
- charid = trie->charmap[ uvc ]; \
- } \
- else { \
- charid = 0; \
- if (widecharmap) { \
- SV** const svpp = hv_fetch(widecharmap, \
- (char*)&uvc, sizeof(UV), 0); \
- if (svpp) \
- charid = (U16)SvIV(*svpp); \
- } \
- } \
-} STMT_END
-
-#define REXEC_FBC_EXACTISH_CHECK(CoNd) \
-{ \
- char *my_strend= (char *)strend; \
- if ( (CoNd) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8, \
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- else { \
- U8 foldbuf[UTF8_MAXBYTES_CASE+1]; \
- uvchr_to_utf8(tmpbuf, c); \
- f = to_utf8_fold(tmpbuf, foldbuf, &foldlen); \
- if ( f != c \
- && (f == c1 || f == c2) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8,\
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- } \
-} \
-s += len
-
-#define REXEC_FBC_EXACTISH_SCAN(CoNd) \
-STMT_START { \
- while (s <= e) { \
- if ( (CoNd) \
- && (ln == 1 || !(OP(c) == EXACTF \
- ? ibcmp(s, m, ln) \
- : ibcmp_locale(s, m, ln))) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_SCAN(CoDe) \
-STMT_START { \
- while (s + (uskip = UTF8SKIP(s)) <= strend) { \
- CoDe \
- s += uskip; \
- } \
-} STMT_END
-
-#define REXEC_FBC_SCAN(CoDe) \
-STMT_START { \
- while (s < strend) { \
- CoDe \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_CLASS_SCAN(CoNd) \
-REXEC_FBC_UTF8_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_CLASS_SCAN(CoNd) \
-REXEC_FBC_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_TRYIT \
-if ((!reginfo || regtry(reginfo, &s))) \
- goto got_it
-
-#define REXEC_FBC_CSCAN(CoNdUtF8,CoNd) \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_PRELOAD(UtFpReLoAd,CoNdUtF8,CoNd) \
- if (do_utf8) { \
- UtFpReLoAd; \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_TAINT(CoNdUtF8,CoNd) \
- PL_reg_flags |= RF_tainted; \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define DUMP_EXEC_POS(li,s,doutf8) \
- dump_exec_pos(li,s,(PL_regeol),(PL_bostr),(PL_reg_starttry),doutf8)
-
-/* We know what class REx starts with. Try to find this position... */
-/* if reginfo is NULL, its a dryrun */
-/* annoyingly all the vars in this routine have different names from their counterparts
- in regmatch. /grrr */
-
-STATIC char *
-S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
- const char *strend, regmatch_info *reginfo)
-{
- dVAR;
- const I32 doevery = (prog->intflags & PREGf_SKIP) == 0;
- char *m;
- STRLEN ln;
- STRLEN lnc;
- register STRLEN uskip;
- unsigned int c1;
- unsigned int c2;
- char *e;
- register I32 tmp = 1; /* Scratch variable? */
- register const bool do_utf8 = PL_reg_match_utf8;
- RXi_GET_DECL(prog,progi);
-
- PERL_ARGS_ASSERT_FIND_BYCLASS;
-
- /* We know what class it must start with. */
- switch (OP(c)) {
- case ANYOF:
- if (do_utf8) {
- REXEC_FBC_UTF8_CLASS_SCAN((ANYOF_FLAGS(c) & ANYOF_UNICODE) ||
- !UTF8_IS_INVARIANT((U8)s[0]) ?
- reginclass(prog, c, (U8*)s, 0, do_utf8) :
- REGINCLASS(prog, c, (U8*)s));
- }
- else {
- while (s < strend) {
- STRLEN skip = 1;
-
- if (REGINCLASS(prog, c, (U8*)s) ||
- (ANYOF_FOLD_SHARP_S(c, s, strend) &&
- /* The assignment of 2 is intentional:
- * for the folded sharp s, the skip is 2. */
- (skip = SHARP_S_SKIP))) {
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += skip;
- }
- }
- break;
- case CANY:
- REXEC_FBC_SCAN(
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- );
- break;
- case EXACTF:
- m = STRING(c);
- ln = STR_LEN(c); /* length to match in octets/bytes */
- lnc = (I32) ln; /* length to match in characters */
- if (UTF) {
- STRLEN ulen1, ulen2;
- U8 *sm = (U8 *) m;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
- /* used by commented-out code below */
- /*const U32 uniflags = UTF8_ALLOW_DEFAULT;*/
-
- /* XXX: Since the node will be case folded at compile
- time this logic is a little odd, although im not
- sure that its actually wrong. --dmq */
-
- c1 = to_utf8_lower((U8*)m, tmpbuf1, &ulen1);
- c2 = to_utf8_upper((U8*)m, tmpbuf2, &ulen2);
-
- /* XXX: This is kinda strange. to_utf8_XYZ returns the
- codepoint of the first character in the converted
- form, yet originally we did the extra step.
- No tests fail by commenting this code out however
- so Ive left it out. -- dmq.
-
- c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- */
-
- lnc = 0;
- while (sm < ((U8 *) m + ln)) {
- lnc++;
- sm += UTF8SKIP(sm);
- }
- }
- else {
- c1 = *(U8*)m;
- c2 = PL_fold[c1];
- }
- goto do_exactf;
- case EXACTFL:
- m = STRING(c);
- ln = STR_LEN(c);
- lnc = (I32) ln;
- c1 = *(U8*)m;
- c2 = PL_fold_locale[c1];
- do_exactf:
- e = HOP3c(strend, -((I32)lnc), s);
-
- if (!reginfo && e < s)
- e = s; /* Due to minlen logic of intuit() */
-
- /* The idea in the EXACTF* cases is to first find the
- * first character of the EXACTF* node and then, if
- * necessary, case-insensitively compare the full
- * text of the node. The c1 and c2 are the first
- * characters (though in Unicode it gets a bit
- * more complicated because there are more cases
- * than just upper and lower: one needs to use
- * the so-called folding case for case-insensitive
- * matching (called "loose matching" in Unicode).
- * ibcmp_utf8() will do just that. */
-
- if (do_utf8 || UTF) {
- UV c, f;
- U8 tmpbuf [UTF8_MAXBYTES+1];
- STRLEN len = 1;
- STRLEN foldlen;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- if (c1 == c2) {
- /* Upper and lower of 1st char are equal -
- * probably not a "letter". */
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
- REXEC_FBC_EXACTISH_CHECK(c == c1);
- }
- }
- else {
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
-
- /* Handle some of the three Greek sigmas cases.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (the character class or ANYOF cases)
- * are handled during compiletime in
- * regexec.c:S_regclass(). */
- if (c == (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA ||
- c == (UV)UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA)
- c = (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA;
-
- REXEC_FBC_EXACTISH_CHECK(c == c1 || c == c2);
- }
- }
- }
- else {
- /* Neither pattern nor string are UTF8 */
- if (c1 == c2)
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1);
- else
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1 || *(U8*)s == c2);
- }
- break;
- case BOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == BOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == BOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- if ((!prog->minlen && tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NBOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == NBOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == NBOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == NBOUND ?
- isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- if ((!prog->minlen && !tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case ALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- isALNUM(*s)
- );
- case ALNUML:
- REXEC_FBC_CSCAN_TAINT(
- isALNUM_LC_utf8((U8*)s),
- isALNUM_LC(*s)
- );
- case NALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- !swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- !isALNUM(*s)
- );
- case NALNUML:
- REXEC_FBC_CSCAN_TAINT(
- !isALNUM_LC_utf8((U8*)s),
- !isALNUM_LC(*s)
- );
- case SPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- *s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8),
- isSPACE(*s)
- );
- case SPACEL:
- REXEC_FBC_CSCAN_TAINT(
- *s == ' ' || isSPACE_LC_utf8((U8*)s),
- isSPACE_LC(*s)
- );
- case NSPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- !(*s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8)),
- !isSPACE(*s)
- );
- case NSPACEL:
- REXEC_FBC_CSCAN_TAINT(
- !(*s == ' ' || isSPACE_LC_utf8((U8*)s)),
- !isSPACE_LC(*s)
- );
- case DIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- isDIGIT(*s)
- );
- case DIGITL:
- REXEC_FBC_CSCAN_TAINT(
- isDIGIT_LC_utf8((U8*)s),
- isDIGIT_LC(*s)
- );
- case NDIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- !swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- !isDIGIT(*s)
- );
- case NDIGITL:
- REXEC_FBC_CSCAN_TAINT(
- !isDIGIT_LC_utf8((U8*)s),
- !isDIGIT_LC(*s)
- );
- case LNBREAK:
- REXEC_FBC_CSCAN(
- is_LNBREAK_utf8(s),
- is_LNBREAK_latin1(s)
- );
- case VERTWS:
- REXEC_FBC_CSCAN(
- is_VERTWS_utf8(s),
- is_VERTWS_latin1(s)
- );
- case NVERTWS:
- REXEC_FBC_CSCAN(
- !is_VERTWS_utf8(s),
- !is_VERTWS_latin1(s)
- );
- case HORIZWS:
- REXEC_FBC_CSCAN(
- is_HORIZWS_utf8(s),
- is_HORIZWS_latin1(s)
- );
- case NHORIZWS:
- REXEC_FBC_CSCAN(
- !is_HORIZWS_utf8(s),
- !is_HORIZWS_latin1(s)
- );
- case AHOCORASICKC:
- case AHOCORASICK:
- {
- DECL_TRIE_TYPE(c);
- /* what trie are we using right now */
- reg_ac_data *aho
- = (reg_ac_data*)progi->data->data[ ARG( c ) ];
- reg_trie_data *trie
- = (reg_trie_data*)progi->data->data[ aho->trie ];
- HV *widecharmap = MUTABLE_HV(progi->data->data[ aho->trie + 1 ]);
-
- const char *last_start = strend - trie->minlen;
-#ifdef DEBUGGING
- const char *real_start = s;
-#endif
- STRLEN maxlen = trie->maxlen;
- SV *sv_points;
- U8 **points; /* map of where we were in the input string
- when reading a given char. For ASCII this
- is unnecessary overhead as the relationship
- is always 1:1, but for Unicode, especially
- case folded Unicode this is not true. */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- U8 *bitmap=NULL;
-
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- /* We can't just allocate points here. We need to wrap it in
- * an SV so it gets freed properly if there is a croak while
- * running the match */
- ENTER;
- SAVETMPS;
- sv_points=newSV(maxlen * sizeof(U8 *));
- SvCUR_set(sv_points,
- maxlen * sizeof(U8 *));
- SvPOK_on(sv_points);
- sv_2mortal(sv_points);
- points=(U8**)SvPV_nolen(sv_points );
- if ( trie_type != trie_utf8_fold
- && (trie->bitmap || OP(c)==AHOCORASICKC) )
- {
- if (trie->bitmap)
- bitmap=(U8*)trie->bitmap;
- else
- bitmap=(U8*)ANYOF_BITMAP(c);
- }
- /* this is the Aho-Corasick algorithm modified a touch
- to include special handling for long "unknown char"
- sequences. The basic idea being that we use AC as long
- as we are dealing with a possible matching char, when
- we encounter an unknown char (and we have not encountered
- an accepting state) we scan forward until we find a legal
- starting char.
- AC matching is basically that of trie matching, except
- that when we encounter a failing transition, we fall back
- to the current states "fail state", and try the current char
- again, a process we repeat until we reach the root state,
- state 1, or a legal transition. If we fail on the root state
- then we can either terminate if we have reached an accepting
- state previously, or restart the entire process from the beginning
- if we have not.
-
- */
- while (s <= last_start) {
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- U8 *uc = (U8*)s;
- U16 charid = 0;
- U32 base = 1;
- U32 state = 1;
- UV uvc = 0;
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- U8 *leftmost = NULL;
-#ifdef DEBUGGING
- U32 accepted_word= 0;
-#endif
- U32 pointpos = 0;
-
- while ( state && uc <= (U8*)strend ) {
- int failed=0;
- U32 word = aho->states[ state ].wordnum;
-
- if( state==1 ) {
- if ( bitmap ) {
- DEBUG_TRIE_EXECUTE_r(
- if ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- dump_exec_pos( (char *)uc, c, strend, real_start,
- (char *)uc, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- " Scanning for legal start char...\n");
- }
- );
- while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- uc++;
- }
- s= (char *)uc;
- }
- if (uc >(U8*)last_start) break;
- }
-
- if ( word ) {
- U8 *lpos= points[ (pointpos - trie->wordlen[word-1] ) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=word);
- leftmost= lpos;
- }
- if (base==0) break;
-
- }
- points[pointpos++ % maxlen]= uc;
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
- DEBUG_TRIE_EXECUTE_r({
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf(Perl_debug_log,
- " Charid:%3u CP:%4"UVxf" ",
- charid, uvc);
- });
-
- do {
-#ifdef DEBUGGING
- word = aho->states[ state ].wordnum;
-#endif
- base = aho->states[ state ].trans.base;
-
- DEBUG_TRIE_EXECUTE_r({
- if (failed)
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%sState: %4"UVxf", word=%"UVxf,
- failed ? " Fail transition to " : "",
- (UV)state, (UV)word);
- });
- if ( base ) {
- U32 tmp;
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state
- && (tmp=trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next))
- {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - legal\n"));
- state = tmp;
- break;
- }
- else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - fail\n"));
- failed = 1;
- state = aho->fail[state];
- }
- }
- else {
- /* we must be accepting here */
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - accepting\n"));
- failed = 1;
- break;
- }
- } while(state);
- uc += len;
- if (failed) {
- if (leftmost)
- break;
- if (!state) state = 1;
- }
- }
- if ( aho->states[ state ].wordnum ) {
- U8 *lpos = points[ (pointpos - trie->wordlen[aho->states[ state ].wordnum-1]) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=aho->states[ state ].wordnum);
- leftmost = lpos;
- }
- }
- if (leftmost) {
- s = (char*)leftmost;
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf(
- Perl_debug_log,"Matches word #%"UVxf" at position %"IVdf". Trying full pattern...\n",
- (UV)accepted_word, (IV)(s - real_start)
- );
- });
- if (!reginfo || regtry(reginfo, &s)) {
- FREETMPS;
- LEAVE;
- goto got_it;
- }
- s = HOPc(s,1);
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,"Pattern failed. Looking for new start point...\n");
- });
- } else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,"No match.\n"));
- break;
- }
- }
- FREETMPS;
- LEAVE;
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c));
- break;
- }
- return 0;
- got_it:
- return s;
-}
-
-
-/*
- - regexec_flags - match a regexp against a string
- */
-I32
-Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, register char *strend,
- char *strbeg, I32 minend, SV *sv, void *data, U32 flags)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* data: May be used for some additional optimizations.
- Currently its only used, with a U32 cast, for transmitting
- the ganch offset when doing a /g match. This will change */
-/* nosave: For optimizations. */
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- /*register*/ char *s;
- register regnode *c;
- /*register*/ char *startpos = stringarg;
- I32 minlen; /* must match at least this many chars */
- I32 dontbother = 0; /* how many characters not to try at end */
- I32 end_shift = 0; /* Same for the end. */ /* CC */
- I32 scream_pos = -1; /* Internal iterator of scream. */
- char *scream_olds = NULL;
- const bool do_utf8 = (bool)DO_UTF8(sv);
- I32 multiline;
- RXi_GET_DECL(prog,progi);
- regmatch_info reginfo; /* create some info to pass to regtry etc */
- regexp_paren_pair *swap = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGEXEC_FLAGS;
- PERL_UNUSED_ARG(data);
-
- /* Be paranoid... */
- if (prog == NULL || startpos == NULL) {
- Perl_croak(aTHX_ "NULL regexp parameter");
- return 0;
- }
-
- multiline = prog->extflags & RXf_PMf_MULTILINE;
- reginfo.prog = rx; /* Yes, sorry that this is confusing. */
-
- RX_MATCH_UTF8_set(rx, do_utf8);
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, startpos, strend,
- "Matching");
- );
-
- minlen = prog->minlen;
-
- if (strend - startpos < (minlen+(prog->check_offset_min<0?prog->check_offset_min:0))) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short [regexec_flags]...\n"));
- goto phooey;
- }
-
-
- /* Check validity of program. */
- if (UCHARAT(progi->program) != REG_MAGIC) {
- Perl_croak(aTHX_ "corrupted regexp program");
- }
-
- PL_reg_flags = 0;
- PL_reg_eval_set = 0;
- PL_reg_maxiter = 0;
-
- if (RX_UTF8(rx))
- PL_reg_flags |= RF_utf8;
-
- /* Mark beginning of line for ^ and lookbehind. */
- reginfo.bol = startpos; /* XXX not used ??? */
- PL_bostr = strbeg;
- reginfo.sv = sv;
-
- /* Mark end of line for $ (and such) */
- PL_regeol = strend;
-
- /* see how far we have to get to not match where we matched before */
- reginfo.till = startpos+minend;
-
- /* If there is a "must appear" string, look for it. */
- s = startpos;
-
- if (prog->extflags & RXf_GPOS_SEEN) { /* Need to set reginfo->ganch */
- MAGIC *mg;
- if (flags & REXEC_IGNOREPOS){ /* Means: check only at start */
- reginfo.ganch = startpos + prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS IGNOREPOS: reginfo.ganch = startpos + %"UVxf"\n",(UV)prog->gofs));
- } else if (sv && SvTYPE(sv) >= SVt_PVMG
- && SvMAGIC(sv)
- && (mg = mg_find(sv, PERL_MAGIC_regex_global))
- && mg->mg_len >= 0) {
- reginfo.ganch = strbeg + mg->mg_len; /* Defined pos() */
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS MAGIC: reginfo.ganch = strbeg + %"IVdf"\n",(IV)mg->mg_len));
-
- if (prog->extflags & RXf_ANCH_GPOS) {
- if (s > reginfo.ganch)
- goto phooey;
- s = reginfo.ganch - prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS ANCH_GPOS: s = ganch - %"UVxf"\n",(UV)prog->gofs));
- if (s < strbeg)
- goto phooey;
- }
- }
- else if (data) {
- reginfo.ganch = strbeg + PTR2UV(data);
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS DATA: reginfo.ganch= strbeg + %"UVxf"\n",PTR2UV(data)));
-
- } else { /* pos() not defined */
- reginfo.ganch = strbeg;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS: reginfo.ganch = strbeg\n"));
- }
- }
- if (PL_curpm && (PM_GETRE(PL_curpm) == rx)) {
- /* We have to be careful. If the previous successful match
- was from this regex we don't want a subsequent partially
- successful match to clobber the old results.
- So when we detect this possibility we add a swap buffer
- to the re, and switch the buffer each match. If we fail
- we switch it back, otherwise we leave it swapped.
- */
- swap = prog->offs;
- /* do we need a save destructor here for eval dies? */
- Newxz(prog->offs, (prog->nparens + 1), regexp_paren_pair);
- }
- if (!(flags & REXEC_CHECKED) && (prog->check_substr != NULL || prog->check_utf8 != NULL)) {
- re_scream_pos_data d;
-
- d.scream_olds = &scream_olds;
- d.scream_pos = &scream_pos;
- s = re_intuit_start(rx, sv, s, strend, flags, &d);
- if (!s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not present...\n"));
- goto phooey; /* not present */
- }
- }
-
-
-
- /* Simplest case: anchored match need be tried only once. */
- /* [unless only anchor is BOL and multiline is set] */
- if (prog->extflags & (RXf_ANCH & ~RXf_ANCH_GPOS)) {
- if (s == startpos && regtry(®info, &startpos))
- goto got_it;
- else if (multiline || (prog->intflags & PREGf_IMPLICIT)
- || (prog->extflags & RXf_ANCH_MBOL)) /* XXXX SBOL? */
- {
- char *end;
-
- if (minlen)
- dontbother = minlen - 1;
- end = HOP3c(strend, -dontbother, strbeg) - 1;
- /* for multiline we only have to try after newlines */
- if (prog->check_substr || prog->check_utf8) {
- if (s == startpos)
- goto after_try;
- while (1) {
- if (regtry(®info, &s))
- goto got_it;
- after_try:
- if (s > end)
- goto phooey;
- if (prog->extflags & RXf_USE_INTUIT) {
- s = re_intuit_start(rx, sv, s + 1, strend, flags, NULL);
- if (!s)
- goto phooey;
- }
- else
- s++;
- }
- } else {
- if (s > startpos)
- s--;
- while (s < end) {
- if (*s++ == '\n') { /* don't need PL_utf8skip here */
- if (regtry(®info, &s))
- goto got_it;
- }
- }
- }
- }
- goto phooey;
- } else if (RXf_GPOS_CHECK == (prog->extflags & RXf_GPOS_CHECK))
- {
- /* the warning about reginfo.ganch being used without intialization
- is bogus -- we set it above, when prog->extflags & RXf_GPOS_SEEN
- and we only enter this block when the same bit is set. */
- char *tmp_s = reginfo.ganch - prog->gofs;
-
- if (tmp_s >= strbeg && regtry(®info, &tmp_s))
- goto got_it;
- goto phooey;
- }
-
- /* Messy cases: unanchored match. */
- if ((prog->anchored_substr || prog->anchored_utf8) && prog->intflags & PREGf_SKIP) {
- /* we have /x+whatever/ */
- /* it must be a one character string (XXXX Except UTF?) */
- char ch;
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- ch = SvPVX_const(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)[0];
-
- if (do_utf8) {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s += UTF8SKIP(s);
- while (s < strend && *s == ch)
- s += UTF8SKIP(s);
- }
- );
- }
- else {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s++;
- while (s < strend && *s == ch)
- s++;
- }
- );
- }
- DEBUG_EXECUTE_r(if (!did_match)
- PerlIO_printf(Perl_debug_log,
- "Did not find anchored character...\n")
- );
- }
- else if (prog->anchored_substr != NULL
- || prog->anchored_utf8 != NULL
- || ((prog->float_substr != NULL || prog->float_utf8 != NULL)
- && prog->float_max_offset < strend - s)) {
- SV *must;
- I32 back_max;
- I32 back_min;
- char *last;
- char *last1; /* Last position checked before */
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (prog->anchored_substr || prog->anchored_utf8) {
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- back_max = back_min = prog->anchored_offset;
- } else {
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- back_max = prog->float_max_offset;
- back_min = prog->float_min_offset;
- }
-
-
- if (must == &PL_sv_undef)
- /* could not downgrade utf8 check substring, so must fail */
- goto phooey;
-
- if (back_min<0) {
- last = strend;
- } else {
- last = HOP3c(strend, /* Cannot start after this */
- -(I32)(CHR_SVLEN(must)
- - (SvTAIL(must) != 0) + back_min), strbeg);
- }
- if (s > PL_bostr)
- last1 = HOPc(s, -1);
- else
- last1 = s - 1; /* bogus */
-
- /* XXXX check_substr already used to find "s", can optimize if
- check_substr==must. */
- scream_pos = -1;
- dontbother = end_shift;
- strend = HOPc(strend, -dontbother);
- while ( (s <= last) &&
- ((flags & REXEC_SCREAM)
- ? (s = screaminstr(sv, must, HOP3c(s, back_min, (back_min<0 ? strbeg : strend)) - strbeg,
- end_shift, &scream_pos, 0))
- : (s = fbm_instr((unsigned char*)HOP3(s, back_min, (back_min<0 ? strbeg : strend)),
- (unsigned char*)strend, must,
- multiline ? FBMrf_MULTILINE : 0))) ) {
- /* we may be pointing at the wrong string */
- if ((flags & REXEC_SCREAM) && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- DEBUG_EXECUTE_r( did_match = 1 );
- if (HOPc(s, -back_max) > last1) {
- last1 = HOPc(s, -back_min);
- s = HOPc(s, -back_max);
- }
- else {
- char * const t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1;
-
- last1 = HOPc(s, -back_min);
- s = t;
- }
- if (do_utf8) {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s += UTF8SKIP(s);
- }
- }
- else {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s++;
- }
- }
- }
- DEBUG_EXECUTE_r(if (!did_match) {
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "Did not find %s substr %s%s...\n",
- ((must == prog->anchored_substr || must == prog->anchored_utf8)
- ? "anchored" : "floating"),
- quoted, RE_SV_TAIL(must));
- });
- goto phooey;
- }
- else if ( (c = progi->regstclass) ) {
- if (minlen) {
- const OPCODE op = OP(progi->regstclass);
- /* don't bother with what can't match */
- if (PL_regkind[op] != EXACT && op != CANY && PL_regkind[op] != TRIE)
- strend = HOPc(strend, -(minlen - 1));
- }
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, c);
- {
- RE_PV_QUOTED_DECL(quoted,do_utf8,PERL_DEBUG_PAD_ZERO(1),
- s,strend-s,60);
- PerlIO_printf(Perl_debug_log,
- "Matching stclass %.*s against %s (%d chars)\n",
- (int)SvCUR(prop), SvPVX_const(prop),
- quoted, (int)(strend - s));
- }
- });
- if (find_byclass(prog, c, s, strend, ®info))
- goto got_it;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass... [regexec_flags]\n"));
- }
- else {
- dontbother = 0;
- if (prog->float_substr != NULL || prog->float_utf8 != NULL) {
- /* Trim the end. */
- char *last;
- SV* float_real;
-
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- float_real = do_utf8 ? prog->float_utf8 : prog->float_substr;
-
- if (flags & REXEC_SCREAM) {
- last = screaminstr(sv, float_real, s - strbeg,
- end_shift, &scream_pos, 1); /* last one */
- if (!last)
- last = scream_olds; /* Only one occurrence. */
- /* we may be pointing at the wrong string */
- else if (RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- }
- else {
- STRLEN len;
- const char * const little = SvPV_const(float_real, len);
-
- if (SvTAIL(float_real)) {
- if (memEQ(strend - len + 1, little, len - 1))
- last = strend - len + 1;
- else if (!multiline)
- last = memEQ(strend - len, little, len)
- ? strend - len : NULL;
- else
- goto find_last;
- } else {
- find_last:
- if (len)
- last = rninstr(s, strend, little, little + len);
- else
- last = strend; /* matching "$" */
- }
- }
- if (last == NULL) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%sCan't trim the tail, match fails (should not happen)%s\n",
- PL_colors[4], PL_colors[5]));
- goto phooey; /* Should not happen! */
- }
- dontbother = strend - last + prog->float_min_offset;
- }
- if (minlen && (dontbother < minlen))
- dontbother = minlen - 1;
- strend -= dontbother; /* this one's always in bytes! */
- /* We don't know much -- general case. */
- if (do_utf8) {
- for (;;) {
- if (regtry(®info, &s))
- goto got_it;
- if (s >= strend)
- break;
- s += UTF8SKIP(s);
- };
- }
- else {
- do {
- if (regtry(®info, &s))
- goto got_it;
- } while (s++ < strend);
- }
- }
-
- /* Failure. */
- goto phooey;
-
-got_it:
- Safefree(swap);
- RX_MATCH_TAINTED_set(rx, PL_reg_flags & RF_tainted);
-
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (RXp_PAREN_NAMES(prog))
- (void)hv_iterinit(RXp_PAREN_NAMES(prog));
-
- /* make sure $`, $&, $', and $digit will work later */
- if ( !(flags & REXEC_NOT_FIRST) ) {
- RX_MATCH_COPY_FREE(rx);
- if (flags & REXEC_COPY_STR) {
- const I32 i = PL_regeol - startpos + (stringarg - strbeg);
-#ifdef PERL_OLD_COPY_ON_WRITE
- if ((SvIsCOW(sv)
- || (SvFLAGS(sv) & CAN_COW_MASK) == CAN_COW_FLAGS)) {
- if (DEBUG_C_TEST) {
- PerlIO_printf(Perl_debug_log,
- "Copy on write: regexp capture, type %d\n",
- (int) SvTYPE(sv));
- }
- prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv);
- prog->subbeg = (char *)SvPVX_const(prog->saved_copy);
- assert (SvPOKp(prog->saved_copy));
- } else
-#endif
- {
- RX_MATCH_COPIED_on(rx);
- s = savepvn(strbeg, i);
- prog->subbeg = s;
- }
- prog->sublen = i;
- }
- else {
- prog->subbeg = strbeg;
- prog->sublen = PL_regeol - strbeg; /* strend may have been modified */
- }
- }
-
- return 1;
-
-phooey:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n",
- PL_colors[4], PL_colors[5]));
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (swap) {
- /* we failed :-( roll it back */
- Safefree(prog->offs);
- prog->offs = swap;
- }
-
- return 0;
-}
-
-
-/*
- - regtry - try match at specific point
- */
-STATIC I32 /* 0 failure, 1 success */
-S_regtry(pTHX_ regmatch_info *reginfo, char **startpos)
-{
- dVAR;
- CHECKPOINT lastcp;
- REGEXP *const rx = reginfo->prog;
- regexp *const prog = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTRY;
-
- reginfo->cutpoint=NULL;
-
- if ((prog->extflags & RXf_EVAL_SEEN) && !PL_reg_eval_set) {
- MAGIC *mg;
-
- PL_reg_eval_set = RS_init;
- DEBUG_EXECUTE_r(DEBUG_s(
- PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n",
- (IV)(PL_stack_sp - PL_stack_base));
- ));
- SAVESTACK_CXPOS();
- cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base;
- /* Otherwise OP_NEXTSTATE will free whatever on stack now. */
- SAVETMPS;
- /* Apparently this is not needed, judging by wantarray. */
- /* SAVEI8(cxstack[cxstack_ix].blk_gimme);
- cxstack[cxstack_ix].blk_gimme = G_SCALAR; */
-
- if (reginfo->sv) {
- /* Make $_ available to executed code. */
- if (reginfo->sv != DEFSV) {
- SAVE_DEFSV;
- DEFSV_set(reginfo->sv);
- }
-
- if (!(SvTYPE(reginfo->sv) >= SVt_PVMG && SvMAGIC(reginfo->sv)
- && (mg = mg_find(reginfo->sv, PERL_MAGIC_regex_global)))) {
- /* prepare for quick setting of pos */
-#ifdef PERL_OLD_COPY_ON_WRITE
- if (SvIsCOW(reginfo->sv))
- sv_force_normal_flags(reginfo->sv, 0);
-#endif
- mg = sv_magicext(reginfo->sv, NULL, PERL_MAGIC_regex_global,
- &PL_vtbl_mglob, NULL, 0);
- mg->mg_len = -1;
- }
- PL_reg_magic = mg;
- PL_reg_oldpos = mg->mg_len;
- SAVEDESTRUCTOR_X(restore_pos, prog);
- }
- if (!PL_reg_curpm) {
- Newxz(PL_reg_curpm, 1, PMOP);
-#ifdef USE_ITHREADS
- {
- SV* const repointer = &PL_sv_undef;
- /* this regexp is also owned by the new PL_reg_curpm, which
- will try to free it. */
- av_push(PL_regex_padav, repointer);
- PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav);
- PL_regex_pad = AvARRAY(PL_regex_padav);
- }
-#endif
- }
-#ifdef USE_ITHREADS
- /* It seems that non-ithreads works both with and without this code.
- So for efficiency reasons it seems best not to have the code
- compiled when it is not needed. */
- /* This is safe against NULLs: */
- ReREFCNT_dec(PM_GETRE(PL_reg_curpm));
- /* PM_reg_curpm owns a reference to this regexp. */
- ReREFCNT_inc(rx);
-#endif
- PM_SETRE(PL_reg_curpm, rx);
- PL_reg_oldcurpm = PL_curpm;
- PL_curpm = PL_reg_curpm;
- if (RXp_MATCH_COPIED(prog)) {
- /* Here is a serious problem: we cannot rewrite subbeg,
- since it may be needed if this match fails. Thus
- $` inside (?{}) could fail... */
- PL_reg_oldsaved = prog->subbeg;
- PL_reg_oldsavedlen = prog->sublen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = prog->saved_copy;
-#endif
- RXp_MATCH_COPIED_off(prog);
- }
- else
- PL_reg_oldsaved = NULL;
- prog->subbeg = PL_bostr;
- prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */
- }
- DEBUG_EXECUTE_r(PL_reg_starttry = *startpos);
- prog->offs[0].start = *startpos - PL_bostr;
- PL_reginput = *startpos;
- PL_reglastparen = &prog->lastparen;
- PL_reglastcloseparen = &prog->lastcloseparen;
- prog->lastparen = 0;
- prog->lastcloseparen = 0;
- PL_regsize = 0;
- PL_regoffs = prog->offs;
- if (PL_reg_start_tmpl <= prog->nparens) {
- PL_reg_start_tmpl = prog->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- /* XXXX What this code is doing here?!!! There should be no need
- to do this again and again, PL_reglastparen should take care of
- this! --ilya*/
-
- /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code.
- * Actually, the code in regcppop() (which Ilya may be meaning by
- * PL_reglastparen), is not needed at all by the test suite
- * (op/regexp, op/pat, op/split), but that code is needed otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * Meanwhile, this code *is* needed for the
- * above-mentioned test suite tests to succeed. The common theme
- * on those tests seems to be returning null fields from matches.
- * --jhi updated by dapm */
-#if 1
- if (prog->nparens) {
- regexp_paren_pair *pp = PL_regoffs;
- register I32 i;
- for (i = prog->nparens; i > (I32)*PL_reglastparen; i--) {
- ++pp;
- pp->start = -1;
- pp->end = -1;
- }
- }
-#endif
- REGCP_SET(lastcp);
- if (regmatch(reginfo, progi->program + 1)) {
- PL_regoffs[0].end = PL_reginput - PL_bostr;
- return 1;
- }
- if (reginfo->cutpoint)
- *startpos= reginfo->cutpoint;
- REGCP_UNWIND(lastcp);
- return 0;
-}
-
-
-#define sayYES goto yes
-#define sayNO goto no
-#define sayNO_SILENT goto no_silent
-
-/* we dont use STMT_START/END here because it leads to
- "unreachable code" warnings, which are bogus, but distracting. */
-#define CACHEsayNO \
- if (ST.cache_mask) \
- PL_reg_poscache[ST.cache_offset] |= ST.cache_mask; \
- sayNO
-
-/* this is used to determine how far from the left messages like
- 'failed...' are printed. It should be set such that messages
- are inline with the regop output that created them.
-*/
-#define REPORT_CODE_OFF 32
-
-
-/* Make sure there is a test for this +1 options in re_tests */
-#define TRIE_INITAL_ACCEPT_BUFFLEN 4;
-
-#define CHRTEST_UNINIT -1001 /* c1/c2 haven't been calculated yet */
-#define CHRTEST_VOID -1000 /* the c1/c2 "next char" test should be skipped */
-
-#define SLAB_FIRST(s) (&(s)->states[0])
-#define SLAB_LAST(s) (&(s)->states[PERL_REGMATCH_SLAB_SLOTS-1])
-
-/* grab a new slab and return the first slot in it */
-
-STATIC regmatch_state *
-S_push_slab(pTHX)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- regmatch_slab *s = PL_regmatch_slab->next;
- if (!s) {
- Newx(s, 1, regmatch_slab);
- s->prev = PL_regmatch_slab;
- s->next = NULL;
- PL_regmatch_slab->next = s;
- }
- PL_regmatch_slab = s;
- return SLAB_FIRST(s);
-}
-
-
-/* push a new state then goto it */
-
-#define PUSH_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_state;
-
-/* push a new state with success backtracking, then goto it */
-
-#define PUSH_YES_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_yes_state;
-
-
-
-/*
-
-regmatch() - main matching routine
-
-This is basically one big switch statement in a loop. We execute an op,
-set 'next' to point the next op, and continue. If we come to a point which
-we may need to backtrack to on failure such as (A|B|C), we push a
-backtrack state onto the backtrack stack. On failure, we pop the top
-state, and re-enter the loop at the state indicated. If there are no more
-states to pop, we return failure.
-
-Sometimes we also need to backtrack on success; for example /A+/, where
-after successfully matching one A, we need to go back and try to
-match another one; similarly for lookahead assertions: if the assertion
-completes successfully, we backtrack to the state just before the assertion
-and then carry on. In these cases, the pushed state is marked as
-'backtrack on success too'. This marking is in fact done by a chain of
-pointers, each pointing to the previous 'yes' state. On success, we pop to
-the nearest yes state, discarding any intermediate failure-only states.
-Sometimes a yes state is pushed just to force some cleanup code to be
-called at the end of a successful match or submatch; e.g. (??{$re}) uses
-it to free the inner regex.
-
-Note that failure backtracking rewinds the cursor position, while
-success backtracking leaves it alone.
-
-A pattern is complete when the END op is executed, while a subpattern
-such as (?=foo) is complete when the SUCCESS op is executed. Both of these
-ops trigger the "pop to last yes state if any, otherwise return true"
-behaviour.
-
-A common convention in this function is to use A and B to refer to the two
-subpatterns (or to the first nodes thereof) in patterns like /A*B/: so A is
-the subpattern to be matched possibly multiple times, while B is the entire
-rest of the pattern. Variable and state names reflect this convention.
-
-The states in the main switch are the union of ops and failure/success of
-substates associated with with that op. For example, IFMATCH is the op
-that does lookahead assertions /(?=A)B/ and so the IFMATCH state means
-'execute IFMATCH'; while IFMATCH_A is a state saying that we have just
-successfully matched A and IFMATCH_A_fail is a state saying that we have
-just failed to match A. Resume states always come in pairs. The backtrack
-state we push is marked as 'IFMATCH_A', but when that is popped, we resume
-at IFMATCH_A or IFMATCH_A_fail, depending on whether we are backtracking
-on success or failure.
-
-The struct that holds a backtracking state is actually a big union, with
-one variant for each major type of op. The variable st points to the
-top-most backtrack struct. To make the code clearer, within each
-block of code we #define ST to alias the relevant union.
-
-Here's a concrete example of a (vastly oversimplified) IFMATCH
-implementation:
-
- switch (state) {
- ....
-
-#define ST st->u.ifmatch
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- ST.foo = ...; // some state we wish to save
- ...
- // push a yes backtrack state with a resume value of
- // IFMATCH_A/IFMATCH_A_fail, then continue execution at the
- // first node of A:
- PUSH_YES_STATE_GOTO(IFMATCH_A, A);
- // NOTREACHED
-
- case IFMATCH_A: // we have successfully executed A; now continue with B
- next = B;
- bar = ST.foo; // do something with the preserved value
- break;
-
- case IFMATCH_A_fail: // A failed, so the assertion failed
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
-
-#undef ST
-
- ...
- }
-
-For any old-timers reading this who are familiar with the old recursive
-approach, the code above is equivalent to:
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- {
- int foo = ...
- ...
- if (regmatch(A)) {
- next = B;
- bar = foo;
- break;
- }
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
- }
-
-The topmost backtrack state, pointed to by st, is usually free. If you
-want to claim it, populate any ST.foo fields in it with values you wish to
-save, then do one of
-
- PUSH_STATE_GOTO(resume_state, node);
- PUSH_YES_STATE_GOTO(resume_state, node);
-
-which sets that backtrack state's resume value to 'resume_state', pushes a
-new free entry to the top of the backtrack stack, then goes to 'node'.
-On backtracking, the free slot is popped, and the saved state becomes the
-new free state. An ST.foo field in this new top state can be temporarily
-accessed to retrieve values, but once the main loop is re-entered, it
-becomes available for reuse.
-
-Note that the depth of the backtrack stack constantly increases during the
-left-to-right execution of the pattern, rather than going up and down with
-the pattern nesting. For example the stack is at its maximum at Z at the
-end of the pattern, rather than at X in the following:
-
- /(((X)+)+)+....(Y)+....Z/
-
-The only exceptions to this are lookahead/behind assertions and the cut,
-(?>A), which pop all the backtrack states associated with A before
-continuing.
-
-Bascktrack state structs are allocated in slabs of about 4K in size.
-PL_regmatch_state and st always point to the currently active state,
-and PL_regmatch_slab points to the slab currently containing
-PL_regmatch_state. The first time regmatch() is called, the first slab is
-allocated, and is never freed until interpreter destruction. When the slab
-is full, a new one is allocated and chained to the end. At exit from
-regmatch(), slabs allocated since entry are freed.
-
-*/
-
-
-#define DEBUG_STATE_pp(pp) \
- DEBUG_STATE_r({ \
- DUMP_EXEC_POS(locinput, scan, do_utf8); \
- PerlIO_printf(Perl_debug_log, \
- " %*s"pp" %s%s%s%s%s\n", \
- depth*2, "", \
- PL_reg_name[st->resume_state], \
- ((st==yes_state||st==mark_state) ? "[" : ""), \
- ((st==yes_state) ? "Y" : ""), \
- ((st==mark_state) ? "M" : ""), \
- ((st==yes_state||st==mark_state) ? "]" : "") \
- ); \
- });
-
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-prog) : -1)
-
-#ifdef DEBUGGING
-
-STATIC void
-S_debug_start_match(pTHX_ const REGEXP *prog, const bool do_utf8,
- const char *start, const char *end, const char *blurb)
-{
- const bool utf8_pat = RX_UTF8(prog) ? 1 : 0;
-
- PERL_ARGS_ASSERT_DEBUG_START_MATCH;
-
- if (!PL_colorset)
- reginitcolors();
- {
- RE_PV_QUOTED_DECL(s0, utf8_pat, PERL_DEBUG_PAD_ZERO(0),
- RX_PRECOMP_const(prog), RX_PRELEN(prog), 60);
-
- RE_PV_QUOTED_DECL(s1, do_utf8, PERL_DEBUG_PAD_ZERO(1),
- start, end - start, 60);
-
- PerlIO_printf(Perl_debug_log,
- "%s%s REx%s %s against %s\n",
- PL_colors[4], blurb, PL_colors[5], s0, s1);
-
- if (do_utf8||utf8_pat)
- PerlIO_printf(Perl_debug_log, "UTF-8 %s%s%s...\n",
- utf8_pat ? "pattern" : "",
- utf8_pat && do_utf8 ? " and " : "",
- do_utf8 ? "string" : ""
- );
- }
-}
-
-STATIC void
-S_dump_exec_pos(pTHX_ const char *locinput,
- const regnode *scan,
- const char *loc_regeol,
- const char *loc_bostr,
- const char *loc_reg_starttry,
- const bool do_utf8)
-{
- const int docolor = *PL_colors[0] || *PL_colors[2] || *PL_colors[4];
- const int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */
- int l = (loc_regeol - locinput) > taill ? taill : (loc_regeol - locinput);
- /* The part of the string before starttry has one color
- (pref0_len chars), between starttry and current
- position another one (pref_len - pref0_len chars),
- after the current position the third one.
- We assume that pref0_len <= pref_len, otherwise we
- decrease pref0_len. */
- int pref_len = (locinput - loc_bostr) > (5 + taill) - l
- ? (5 + taill) - l : locinput - loc_bostr;
- int pref0_len;
-
- PERL_ARGS_ASSERT_DUMP_EXEC_POS;
-
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len)))
- pref_len++;
- pref0_len = pref_len - (locinput - loc_reg_starttry);
- if (l + pref_len < (5 + taill) && l < loc_regeol - locinput)
- l = ( loc_regeol - locinput > (5 + taill) - pref_len
- ? (5 + taill) - pref_len : loc_regeol - locinput);
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput + l)))
- l--;
- if (pref0_len < 0)
- pref0_len = 0;
- if (pref0_len > pref_len)
- pref0_len = pref_len;
- {
- const int is_uni = (do_utf8 && OP(scan) != CANY) ? 1 : 0;
-
- RE_PV_COLOR_DECL(s0,len0,is_uni,PERL_DEBUG_PAD(0),
- (locinput - pref_len),pref0_len, 60, 4, 5);
-
- RE_PV_COLOR_DECL(s1,len1,is_uni,PERL_DEBUG_PAD(1),
- (locinput - pref_len + pref0_len),
- pref_len - pref0_len, 60, 2, 3);
-
- RE_PV_COLOR_DECL(s2,len2,is_uni,PERL_DEBUG_PAD(2),
- locinput, loc_regeol - locinput, 10, 0, 1);
-
- const STRLEN tlen=len0+len1+len2;
- PerlIO_printf(Perl_debug_log,
- "%4"IVdf" <%.*s%.*s%s%.*s>%*s|",
- (IV)(locinput - loc_bostr),
- len0, s0,
- len1, s1,
- (docolor ? "" : "> <"),
- len2, s2,
- (int)(tlen > 19 ? 0 : 19 - tlen),
- "");
- }
-}
-
-#endif
-
-/* reg_check_named_buff_matched()
- * Checks to see if a named buffer has matched. The data array of
- * buffer numbers corresponding to the buffer is expected to reside
- * in the regexp->data->data array in the slot stored in the ARG() of
- * node involved. Note that this routine doesn't actually care about the
- * name, that information is not preserved from compilation to execution.
- * Returns the index of the leftmost defined buffer with the given name
- * or 0 if non of the buffers matched.
- */
-STATIC I32
-S_reg_check_named_buff_matched(pTHX_ const regexp *rex, const regnode *scan)
-{
- I32 n;
- RXi_GET_DECL(rex,rexi);
- SV *sv_dat= MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
-
- PERL_ARGS_ASSERT_REG_CHECK_NAMED_BUFF_MATCHED;
-
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- if ((I32)*PL_reglastparen >= nums[n] &&
- PL_regoffs[nums[n]].end != -1)
- {
- return nums[n];
- }
- }
- return 0;
-}
-
-
-/* free all slabs above current one - called during LEAVE_SCOPE */
-
-STATIC void
-S_clear_backtrack_stack(pTHX_ void *p)
-{
- regmatch_slab *s = PL_regmatch_slab->next;
- PERL_UNUSED_ARG(p);
-
- if (!s)
- return;
- PL_regmatch_slab->next = NULL;
- while (s) {
- regmatch_slab * const osl = s;
- s = s->next;
- Safefree(osl);
- }
-}
-
-
-#define SETREX(Re1,Re2) \
- if (PL_reg_eval_set) PM_SETRE((PL_reg_curpm), (Re2)); \
- Re1 = (Re2)
-
-STATIC I32 /* 0 failure, 1 success */
-S_regmatch(pTHX_ regmatch_info *reginfo, regnode *prog)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- dVAR;
- register const bool do_utf8 = PL_reg_match_utf8;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- REGEXP *rex_sv = reginfo->prog;
- regexp *rex = (struct regexp *)SvANY(rex_sv);
- RXi_GET_DECL(rex,rexi);
- I32 oldsave;
- /* the current state. This is a cached copy of PL_regmatch_state */
- register regmatch_state *st;
- /* cache heavy used fields of st in registers */
- register regnode *scan;
- register regnode *next;
- register U32 n = 0; /* general value; init to avoid compiler warning */
- register I32 ln = 0; /* len or last; init to avoid compiler warning */
- register char *locinput = PL_reginput;
- register I32 nextchr; /* is always set to UCHARAT(locinput) */
-
- bool result = 0; /* return value of S_regmatch */
- int depth = 0; /* depth of backtrack stack */
- U32 nochange_depth = 0; /* depth of GOSUB recursion with nochange */
- const U32 max_nochange_depth =
- (3 * rex->nparens > MAX_RECURSE_EVAL_NOCHANGE_DEPTH) ?
- 3 * rex->nparens : MAX_RECURSE_EVAL_NOCHANGE_DEPTH;
- regmatch_state *yes_state = NULL; /* state to pop to on success of
- subpattern */
- /* mark_state piggy backs on the yes_state logic so that when we unwind
- the stack on success we can update the mark_state as we go */
- regmatch_state *mark_state = NULL; /* last mark state we have seen */
- regmatch_state *cur_eval = NULL; /* most recent EVAL_AB state */
- struct regmatch_state *cur_curlyx = NULL; /* most recent curlyx */
- U32 state_num;
- bool no_final = 0; /* prevent failure from backtracking? */
- bool do_cutgroup = 0; /* no_final only until next branch/trie entry */
- char *startpoint = PL_reginput;
- SV *popmark = NULL; /* are we looking for a mark? */
- SV *sv_commit = NULL; /* last mark name seen in failure */
- SV *sv_yes_mark = NULL; /* last mark name we have seen
- during a successfull match */
- U32 lastopen = 0; /* last open we saw */
- bool has_cutgroup = RX_HAS_CUTGROUP(rex) ? 1 : 0;
- SV* const oreplsv = GvSV(PL_replgv);
- /* these three flags are set by various ops to signal information to
- * the very next op. They have a useful lifetime of exactly one loop
- * iteration, and are not preserved or restored by state pushes/pops
- */
- bool sw = 0; /* the condition value in (?(cond)a|b) */
- bool minmod = 0; /* the next "{n,m}" is a "{n,m}?" */
- int logical = 0; /* the following EVAL is:
- 0: (?{...})
- 1: (?(?{...})X|Y)
- 2: (??{...})
- or the following IFMATCH/UNLESSM is:
- false: plain (?=foo)
- true: used as a condition: (?(?=foo))
- */
-#ifdef DEBUGGING
- GET_RE_DEBUG_FLAGS_DECL;
-#endif
-
- PERL_ARGS_ASSERT_REGMATCH;
-
- DEBUG_OPTIMISE_r( DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,"regmatch start\n");
- }));
- /* on first ever call to regmatch, allocate first slab */
- if (!PL_regmatch_slab) {
- Newx(PL_regmatch_slab, 1, regmatch_slab);
- PL_regmatch_slab->prev = NULL;
- PL_regmatch_slab->next = NULL;
- PL_regmatch_state = SLAB_FIRST(PL_regmatch_slab);
- }
-
- oldsave = PL_savestack_ix;
- SAVEDESTRUCTOR_X(S_clear_backtrack_stack, NULL);
- SAVEVPTR(PL_regmatch_slab);
- SAVEVPTR(PL_regmatch_state);
-
- /* grab next free state slot */
- st = ++PL_regmatch_state;
- if (st > SLAB_LAST(PL_regmatch_slab))
- st = PL_regmatch_state = S_push_slab(aTHX);
-
- /* Note that nextchr is a byte even in UTF */
- nextchr = UCHARAT(locinput);
- scan = prog;
- while (scan != NULL) {
-
- DEBUG_EXECUTE_r( {
- SV * const prop = sv_newmortal();
- regnode *rnext=regnext(scan);
- DUMP_EXEC_POS( locinput, scan, do_utf8 );
- regprop(rex, prop, scan);
-
- PerlIO_printf(Perl_debug_log,
- "%3"IVdf":%*s%s(%"IVdf")\n",
- (IV)(scan - rexi->program), depth*2, "",
- SvPVX_const(prop),
- (PL_regkind[OP(scan)] == END || !rnext) ?
- 0 : (IV)(rnext - rexi->program));
- });
-
- next = scan + NEXT_OFF(scan);
- if (next == scan)
- next = NULL;
- state_num = OP(scan);
-
- reenter_switch:
-
- assert(PL_reglastparen == &rex->lastparen);
- assert(PL_reglastcloseparen == &rex->lastcloseparen);
- assert(PL_regoffs == rex->offs);
-
- switch (state_num) {
- case BOL:
- if (locinput == PL_bostr)
- {
- /* reginfo->till = reginfo->bol; */
- break;
- }
- sayNO;
- case MBOL:
- if (locinput == PL_bostr ||
- ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n'))
- {
- break;
- }
- sayNO;
- case SBOL:
- if (locinput == PL_bostr)
- break;
- sayNO;
- case GPOS:
- if (locinput == reginfo->ganch)
- break;
- sayNO;
-
- case KEEPS:
- /* update the startpoint */
- st->u.keeper.val = PL_regoffs[0].start;
- PL_reginput = locinput;
- PL_regoffs[0].start = locinput - PL_bostr;
- PUSH_STATE_GOTO(KEEPS_next, next);
- /*NOT-REACHED*/
- case KEEPS_next_fail:
- /* rollback the start point change */
- PL_regoffs[0].start = st->u.keeper.val;
- sayNO_SILENT;
- /*NOT-REACHED*/
- case EOL:
- goto seol;
- case MEOL:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- break;
- case SEOL:
- seol:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- if (PL_regeol - locinput > 1)
- sayNO;
- break;
- case EOS:
- if (PL_regeol != locinput)
- sayNO;
- break;
- case SANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
- case CANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case REG_ANY:
- if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n')
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
-
-#undef ST
-#define ST st->u.trie
- case TRIEC:
- /* In this case the charclass data is available inline so
- we can fail fast without a lot of extra overhead.
- */
- if (scan->flags == EXACT || !do_utf8) {
- if(!ANYOF_BITMAP_TEST(scan, *locinput)) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case TRIE:
- {
- /* what type of TRIE am I? (utf8 makes this contextual) */
- DECL_TRIE_TYPE(scan);
-
- /* what trie are we using right now */
- reg_trie_data * const trie
- = (reg_trie_data*)rexi->data->data[ ARG( scan ) ];
- HV * widecharmap = MUTABLE_HV(rexi->data->data[ ARG( scan ) + 1 ]);
- U32 state = trie->startstate;
-
- if (trie->bitmap && trie_type != trie_utf8_fold &&
- !TRIE_BITMAP_TEST(trie,*locinput)
- ) {
- if (trie->states[ state ].wordnum) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %smatched empty string...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- break;
- } else {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- }
- }
-
- {
- U8 *uc = ( U8* )locinput;
-
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- STRLEN bufflen=0;
- SV *sv_accept_buff = NULL;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- ST.accepted = 0; /* how many accepting states we have seen */
- ST.B = next;
- ST.jump = trie->jump;
- ST.me = scan;
- /*
- traverse the TRIE keeping track of all accepting states
- we transition through until we get to a failing node.
- */
-
- while ( state && uc <= (U8*)PL_regeol ) {
- U32 base = trie->states[ state ].trans.base;
- UV uvc = 0;
- U16 charid;
- /* We use charid to hold the wordnum as we don't use it
- for charid until after we have done the wordnum logic.
- We define an alias just so that the wordnum logic reads
- more naturally. */
-
-#define got_wordnum charid
- got_wordnum = trie->states[ state ].wordnum;
-
- if ( got_wordnum ) {
- if ( ! ST.accepted ) {
- ENTER;
- SAVETMPS; /* XXX is this necessary? dmq */
- bufflen = TRIE_INITAL_ACCEPT_BUFFLEN;
- sv_accept_buff=newSV(bufflen *
- sizeof(reg_trie_accepted) - 1);
- SvCUR_set(sv_accept_buff, 0);
- SvPOK_on(sv_accept_buff);
- sv_2mortal(sv_accept_buff);
- SAVETMPS;
- ST.accept_buff =
- (reg_trie_accepted*)SvPV_nolen(sv_accept_buff );
- }
- do {
- if (ST.accepted >= bufflen) {
- bufflen *= 2;
- ST.accept_buff =(reg_trie_accepted*)
- SvGROW(sv_accept_buff,
- bufflen * sizeof(reg_trie_accepted));
- }
- SvCUR_set(sv_accept_buff,SvCUR(sv_accept_buff)
- + sizeof(reg_trie_accepted));
-
-
- ST.accept_buff[ST.accepted].wordnum = got_wordnum;
- ST.accept_buff[ST.accepted].endpos = uc;
- ++ST.accepted;
- } while (trie->nextword && (got_wordnum= trie->nextword[got_wordnum]));
- }
-#undef got_wordnum
-
- DEBUG_TRIE_EXECUTE_r({
- DUMP_EXEC_POS( (char *)uc, scan, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%*s %sState: %4"UVxf" Accepted: %4"UVxf" ",
- 2+depth * 2, "", PL_colors[4],
- (UV)state, (UV)ST.accepted );
- });
-
- if ( base ) {
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
-
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state)
- {
- state = trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next;
- }
- else {
- state = 0;
- }
- uc += len;
-
- }
- else {
- state = 0;
- }
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "Charid:%3x CP:%4"UVxf" After State: %4"UVxf"%s\n",
- charid, uvc, (UV)state, PL_colors[5] );
- );
- }
- if (!ST.accepted )
- sayNO;
-
- DEBUG_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" possible matches%s\n",
- REPORT_CODE_OFF + depth * 2, "",
- PL_colors[4], (IV)ST.accepted, PL_colors[5] );
- );
- }}
- goto trie_first_try; /* jump into the fail handler */
- /* NOTREACHED */
- case TRIE_next_fail: /* we failed - try next alterative */
- if ( ST.jump) {
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- }
- trie_first_try:
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
-
- if ( ST.jump) {
- ST.lastparen = *PL_reglastparen;
- REGCP_SET(ST.cp);
- }
- if ( ST.accepted == 1 ) {
- /* only one choice left - just continue */
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ 0 ].wordnum-1, 0 );
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %sonly one match left: #%d <%s>%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[ 0 ].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- )
- : "not compiled under -Dr",
- PL_colors[5] );
- });
- PL_reginput = (char *)ST.accept_buff[ 0 ].endpos;
- /* in this case we free tmps/leave before we call regmatch
- as we wont be using accept_buff again. */
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- if ( !ST.jump || !ST.jump[ST.accept_buff[0].wordnum])
- scan = ST.B;
- else
- scan = ST.me + ST.jump[ST.accept_buff[0].wordnum];
- if (!has_cutgroup) {
- FREETMPS;
- LEAVE;
- } else {
- ST.accepted--;
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- }
-
- continue; /* execute rest of RE */
- }
-
- if ( !ST.accepted-- ) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sTRIE failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- FREETMPS;
- LEAVE;
- sayNO_SILENT;
- /*NOTREACHED*/
- }
-
- /*
- There are at least two accepting states left. Presumably
- the number of accepting states is going to be low,
- typically two. So we simply scan through to find the one
- with lowest wordnum. Once we find it, we swap the last
- state into its place and decrement the size. We then try to
- match the rest of the pattern at the point where the word
- ends. If we succeed, control just continues along the
- regex; if we fail we return here to try the next accepting
- state
- */
-
- {
- U32 best = 0;
- U32 cur;
- for( cur = 1 ; cur <= ST.accepted ; cur++ ) {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" (%d) as best, looking at %"IVdf" (%d)%s\n",
- REPORT_CODE_OFF + depth * 2, "", PL_colors[4],
- (IV)best, ST.accept_buff[ best ].wordnum, (IV)cur,
- ST.accept_buff[ cur ].wordnum, PL_colors[5] );
- );
-
- if (ST.accept_buff[cur].wordnum <
- ST.accept_buff[best].wordnum)
- best = cur;
- }
-
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ best ].wordnum - 1, 0 );
- regnode *nextop=(!ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) ?
- ST.B :
- ST.me + ST.jump[ST.accept_buff[best].wordnum];
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %strying alternation #%d <%s> at node #%d %s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[best].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- ) : "not compiled under -Dr",
- REG_NODE_NUM(nextop),
- PL_colors[5] );
- });
-
- if ( best<ST.accepted ) {
- reg_trie_accepted tmp = ST.accept_buff[ best ];
- ST.accept_buff[ best ] = ST.accept_buff[ ST.accepted ];
- ST.accept_buff[ ST.accepted ] = tmp;
- best = ST.accepted;
- }
- PL_reginput = (char *)ST.accept_buff[ best ].endpos;
- if ( !ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) {
- scan = ST.B;
- } else {
- scan = ST.me + ST.jump[ST.accept_buff[best].wordnum];
- }
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- /* NOTREACHED */
- }
- /* NOTREACHED */
- case TRIE_next:
- /* we dont want to throw this away, see bug 57042*/
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- FREETMPS;
- LEAVE;
- sayYES;
-#undef ST
-
- case EXACT: {
- char *s = STRING(scan);
- ln = STR_LEN(scan);
- if (do_utf8 != UTF) {
- /* The target and the pattern have differing utf8ness. */
- char *l = locinput;
- const char * const e = s + ln;
-
- if (do_utf8) {
- /* The target is utf8, the pattern is not utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*(U8*)s) !=
- utf8n_to_uvuni((U8*)l, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- l += ulen;
- s ++;
- }
- }
- else {
- /* The target is not utf8, the pattern is utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*((U8*)l)) !=
- utf8n_to_uvuni((U8*)s, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- s += ulen;
- l ++;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
- /* The target and the pattern have the same utf8ness. */
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr)
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && memNE(s, locinput, ln))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case EXACTFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case EXACTF: {
- char * const s = STRING(scan);
- ln = STR_LEN(scan);
-
- if (do_utf8 || UTF) {
- /* Either target or the pattern are utf8. */
- const char * const l = locinput;
- char *e = PL_regeol;
-
- if (ibcmp_utf8(s, 0, ln, (bool)UTF,
- l, &e, 0, do_utf8)) {
- /* One more case for the sharp s:
- * pack("U0U*", 0xDF) =~ /ss/i,
- * the 0xC3 0x9F are the UTF-8
- * byte sequence for the U+00DF. */
-
- if (!(do_utf8 &&
- toLOWER(s[0]) == 's' &&
- ln >= 2 &&
- toLOWER(s[1]) == 's' &&
- (U8)l[0] == 0xC3 &&
- e - l >= 2 &&
- (U8)l[1] == 0x9F))
- sayNO;
- }
- locinput = e;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Neither the target and the pattern are utf8. */
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- UCHARAT(s) != ((OP(scan) == EXACTF)
- ? PL_fold : PL_fold_locale)[nextchr])
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && (OP(scan) == EXACTF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln)))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case BOUNDL:
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- case NBOUND:
- /* was last char in word? */
- if (do_utf8) {
- if (locinput == PL_bostr)
- ln = '\n';
- else {
- const U8 * const r = reghop3((U8*)locinput, -1, (U8*)PL_bostr);
-
- ln = utf8n_to_uvchr(r, UTF8SKIP(r), 0, uniflags);
- }
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM_uni(ln);
- LOAD_UTF8_CHARCLASS_ALNUM();
- n = swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8);
- }
- else {
- ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln));
- n = isALNUM_LC_utf8((U8*)locinput);
- }
- }
- else {
- ln = (locinput != PL_bostr) ?
- UCHARAT(locinput - 1) : '\n';
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM(ln);
- n = isALNUM(nextchr);
- }
- else {
- ln = isALNUM_LC(ln);
- n = isALNUM_LC(nextchr);
- }
- }
- if (((!ln) == (!n)) == (OP(scan) == BOUND ||
- OP(scan) == BOUNDL))
- sayNO;
- break;
- case ANYOF:
- if (do_utf8) {
- STRLEN inclasslen = PL_regeol - locinput;
-
- if (!reginclass(rex, scan, (U8*)locinput, &inclasslen, do_utf8))
- goto anyof_fail;
- if (locinput >= PL_regeol)
- sayNO;
- locinput += inclasslen ? inclasslen : UTF8SKIP(locinput);
- nextchr = UCHARAT(locinput);
- break;
- }
- else {
- if (nextchr < 0)
- nextchr = UCHARAT(locinput);
- if (!REGINCLASS(rex, scan, (U8*)locinput))
- goto anyof_fail;
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- }
- anyof_fail:
- /* If we might have the case of the German sharp s
- * in a casefolding Unicode character class. */
-
- if (ANYOF_FOLD_SHARP_S(scan, locinput, PL_regeol)) {
- locinput += SHARP_S_SKIP;
- nextchr = UCHARAT(locinput);
- }
- else
- sayNO;
- break;
- /* Special char classes - The defines start on line 129 or so */
- CCC_TRY_AFF( ALNUM, ALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
- CCC_TRY_NEG(NALNUM, NALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
-
- CCC_TRY_AFF( SPACE, SPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
- CCC_TRY_NEG(NSPACE, NSPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
-
- CCC_TRY_AFF( DIGIT, DIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
- CCC_TRY_NEG(NDIGIT, NDIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
-
- case CLUMP:
- if (locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- LOAD_UTF8_CHARCLASS_MARK();
- if (swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8))
- sayNO;
- locinput += PL_utf8skip[nextchr];
- while (locinput < PL_regeol &&
- swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8))
- locinput += UTF8SKIP(locinput);
- if (locinput > PL_regeol)
- sayNO;
- }
- else
- locinput++;
- nextchr = UCHARAT(locinput);
- break;
-
- case NREFFL:
- {
- char *s;
- char type;
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NREF:
- case NREFF:
- type = OP(scan);
- n = reg_check_named_buff_matched(rex,scan);
-
- if ( n ) {
- type = REF + ( type - NREF );
- goto do_ref;
- } else {
- sayNO;
- }
- /* unreached */
- case REFFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case REF:
- case REFF:
- n = ARG(scan); /* which paren pair */
- type = OP(scan);
- do_ref:
- ln = PL_regoffs[n].start;
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (*PL_reglastparen < n || ln == -1)
- sayNO; /* Do not match unless seen CLOSEn. */
- if (ln == PL_regoffs[n].end)
- break;
-
- s = PL_bostr + ln;
- if (do_utf8 && type != REF) { /* REF can do byte comparison */
- char *l = locinput;
- const char *e = PL_bostr + PL_regoffs[n].end;
- /*
- * Note that we can't do the "other character" lookup trick as
- * in the 8-bit case (no pun intended) because in Unicode we
- * have to map both upper and title case to lower case.
- */
- if (type == REFF) {
- while (s < e) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- if (l >= PL_regeol)
- sayNO;
- toLOWER_utf8((U8*)s, tmpbuf1, &ulen1);
- toLOWER_utf8((U8*)l, tmpbuf2, &ulen2);
- if (ulen1 != ulen2 || memNE((char *)tmpbuf1, (char *)tmpbuf2, ulen1))
- sayNO;
- s += ulen1;
- l += ulen2;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- (type == REF ||
- (UCHARAT(s) != (type == REFF
- ? PL_fold : PL_fold_locale)[nextchr])))
- sayNO;
- ln = PL_regoffs[n].end - ln;
- if (locinput + ln > PL_regeol)
- sayNO;
- if (ln > 1 && (type == REF
- ? memNE(s, locinput, ln)
- : (type == REFF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln))))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case NOTHING:
- case TAIL:
- break;
- case BACK:
- break;
-
-#undef ST
-#define ST st->u.eval
- {
- SV *ret;
- REGEXP *re_sv;
- regexp *re;
- regexp_internal *rei;
- regnode *startpoint;
-
- case GOSTART:
- case GOSUB: /* /(...(?1))/ /(...(?&foo))/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if (cur_eval->u.eval.close_paren == (U32)ARG(scan))
- Perl_croak(aTHX_ "Infinite recursion in regex");
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_
- "Pattern subroutine nesting without pos change"
- " exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- re_sv = rex_sv;
- re = rex;
- rei = rexi;
- (void)ReREFCNT_inc(rex_sv);
- if (OP(scan)==GOSUB) {
- startpoint = scan + ARG2L(scan);
- ST.close_paren = ARG(scan);
- } else {
- startpoint = rei->program+1;
- ST.close_paren = 0;
- }
- goto eval_recurse_doit;
- /* NOTREACHED */
- case EVAL: /* /(?{A})B/ /(??{A})B/ and /(?(?{A})X|Y)B/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_ "EVAL without pos change exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- {
- /* execute the code in the {...} */
- dSP;
- SV ** const before = SP;
- OP_4tree * const oop = PL_op;
- COP * const ocurcop = PL_curcop;
- PAD *old_comppad;
- char *saved_regeol = PL_regeol;
-
- n = ARG(scan);
- PL_op = (OP_4tree*)rexi->data->data[n];
- DEBUG_STATE_r( PerlIO_printf(Perl_debug_log,
- " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) );
- PAD_SAVE_LOCAL(old_comppad, (PAD*)rexi->data->data[n + 2]);
- PL_regoffs[0].end = PL_reg_magic->mg_len = locinput - PL_bostr;
-
- if (sv_yes_mark) {
- SV *sv_mrk = get_sv("REGMARK", 1);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- CALLRUNOPS(aTHX); /* Scalar context. */
- SPAGAIN;
- if (SP == before)
- ret = &PL_sv_undef; /* protect against empty (?{}) blocks. */
- else {
- ret = POPs;
- PUTBACK;
- }
-
- PL_op = oop;
- PAD_RESTORE_LOCAL(old_comppad);
- PL_curcop = ocurcop;
- PL_regeol = saved_regeol;
- if (!logical) {
- /* /(?{...})/ */
- sv_setsv(save_scalar(PL_replgv), ret);
- break;
- }
- }
- if (logical == 2) { /* Postponed subexpression: /(??{...})/ */
- logical = 0;
- {
- /* extract RE object from returned value; compiling if
- * necessary */
- MAGIC *mg = NULL;
- REGEXP *rx = NULL;
-
- if (SvROK(ret)) {
- SV *const sv = SvRV(ret);
-
- if (SvTYPE(sv) == SVt_REGEXP) {
- rx = (REGEXP*) sv;
- } else if (SvSMAGICAL(sv)) {
- mg = mg_find(sv, PERL_MAGIC_qr);
- assert(mg);
- }
- } else if (SvTYPE(ret) == SVt_REGEXP) {
- rx = (REGEXP*) ret;
- } else if (SvSMAGICAL(ret)) {
- if (SvGMAGICAL(ret)) {
- /* I don't believe that there is ever qr magic
- here. */
- assert(!mg_find(ret, PERL_MAGIC_qr));
- sv_unmagic(ret, PERL_MAGIC_qr);
- }
- else {
- mg = mg_find(ret, PERL_MAGIC_qr);
- /* testing suggests mg only ends up non-NULL for
- scalars who were upgraded and compiled in the
- else block below. In turn, this is only
- triggered in the "postponed utf8 string" tests
- in t/op/pat.t */
- }
- }
-
- if (mg) {
- rx = (REGEXP *) mg->mg_obj; /*XXX:dmq*/
- assert(rx);
- }
- if (rx) {
- rx = reg_temp_copy(NULL, rx);
- }
- else {
- U32 pm_flags = 0;
- const I32 osize = PL_regsize;
-
- if (DO_UTF8(ret)) {
- assert (SvUTF8(ret));
- } else if (SvUTF8(ret)) {
- /* Not doing UTF-8, despite what the SV says. Is
- this only if we're trapped in use 'bytes'? */
- /* Make a copy of the octet sequence, but without
- the flag on, as the compiler now honours the
- SvUTF8 flag on ret. */
- STRLEN len;
- const char *const p = SvPV(ret, len);
- ret = newSVpvn_flags(p, len, SVs_TEMP);
- }
- rx = CALLREGCOMP(ret, pm_flags);
- if (!(SvFLAGS(ret)
- & (SVs_TEMP | SVs_PADTMP | SVf_READONLY
- | SVs_GMG))) {
- /* This isn't a first class regexp. Instead, it's
- caching a regexp onto an existing, Perl visible
- scalar. */
- sv_magic(ret, MUTABLE_SV(rx), PERL_MAGIC_qr, 0, 0);
- }
- PL_regsize = osize;
- }
- re_sv = rx;
- re = (struct regexp *)SvANY(rx);
- }
- RXp_MATCH_COPIED_off(re);
- re->subbeg = rex->subbeg;
- re->sublen = rex->sublen;
- rei = RXi_GET(re);
- DEBUG_EXECUTE_r(
- debug_start_match(re_sv, do_utf8, locinput, PL_regeol,
- "Matching embedded");
- );
- startpoint = rei->program + 1;
- ST.close_paren = 0; /* only used for GOSUB */
- /* borrowed from regtry */
- if (PL_reg_start_tmpl <= re->nparens) {
- PL_reg_start_tmpl = re->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- eval_recurse_doit: /* Share code with GOSUB below this line */
- /* run the pattern returned from (??{...}) */
- ST.cp = regcppush(0); /* Save *all* the positions. */
- REGCP_SET(ST.lastcp);
-
- PL_regoffs = re->offs; /* essentially NOOP on GOSUB */
-
- /* see regtry, specifically PL_reglast(?:close)?paren is a pointer! (i dont know why) :dmq */
- PL_reglastparen = &re->lastparen;
- PL_reglastcloseparen = &re->lastcloseparen;
- re->lastparen = 0;
- re->lastcloseparen = 0;
-
- PL_reginput = locinput;
- PL_regsize = 0;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
-
- ST.toggle_reg_flags = PL_reg_flags;
- if (RX_UTF8(re_sv))
- PL_reg_flags |= RF_utf8;
- else
- PL_reg_flags &= ~RF_utf8;
- ST.toggle_reg_flags ^= PL_reg_flags; /* diff of old and new */
-
- ST.prev_rex = rex_sv;
- ST.prev_curlyx = cur_curlyx;
- SETREX(rex_sv,re_sv);
- rex = re;
- rexi = rei;
- cur_curlyx = NULL;
- ST.B = next;
- ST.prev_eval = cur_eval;
- cur_eval = st;
- /* now continue from first node in postoned RE */
- PUSH_YES_STATE_GOTO(EVAL_AB, startpoint);
- /* NOTREACHED */
- }
- /* logical is 1, /(?(?{...})X|Y)/ */
- sw = (bool)SvTRUE(ret);
- logical = 0;
- break;
- }
-
- case EVAL_AB: /* cleanup after a successful (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- regcpblow(ST.cp);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
- /* also update PL_regoffs */
- PL_regoffs = rex->offs;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayYES;
-
-
- case EVAL_AB_fail: /* unsuccessfully ran A or B in (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- PL_reginput = locinput;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayNO_SILENT;
-#undef ST
-
- case OPEN:
- n = ARG(scan); /* which paren pair */
- PL_reg_start_tmp[n] = locinput;
- if (n > PL_regsize)
- PL_regsize = n;
- lastopen = n;
- break;
- case CLOSE:
- n = ARG(scan); /* which paren pair */
- PL_regoffs[n].start = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if (cur_eval && cur_eval->u.eval.close_paren == n) {
- goto fake_end;
- }
- break;
- case ACCEPT:
- if (ARG(scan)){
- regnode *cursor;
- for (cursor=scan;
- cursor && OP(cursor)!=END;
- cursor=regnext(cursor))
- {
- if ( OP(cursor)==CLOSE ){
- n = ARG(cursor);
- if ( n <= lastopen ) {
- PL_regoffs[n].start
- = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if ( n == ARG(scan) || (cur_eval &&
- cur_eval->u.eval.close_paren == n))
- break;
- }
- }
- }
- }
- goto fake_end;
- /*NOTREACHED*/
- case GROUPP:
- n = ARG(scan); /* which paren pair */
- sw = (bool)(*PL_reglastparen >= n && PL_regoffs[n].end != -1);
- break;
- case NGROUPP:
- /* reg_check_named_buff_matched returns 0 for no match */
- sw = (bool)(0 < reg_check_named_buff_matched(rex,scan));
- break;
- case INSUBP:
- n = ARG(scan);
- sw = (cur_eval && (!n || cur_eval->u.eval.close_paren == n));
- break;
- case DEFINEP:
- sw = 0;
- break;
- case IFTHEN:
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (sw)
- next = NEXTOPER(NEXTOPER(scan));
- else {
- next = scan + ARG(scan);
- if (OP(next) == IFTHEN) /* Fake one. */
- next = NEXTOPER(NEXTOPER(next));
- }
- break;
- case LOGICAL:
- logical = scan->flags;
- break;
-
-/*******************************************************************
-
-The CURLYX/WHILEM pair of ops handle the most generic case of the /A*B/
-pattern, where A and B are subpatterns. (For simple A, CURLYM or
-STAR/PLUS/CURLY/CURLYN are used instead.)
-
-A*B is compiled as <CURLYX><A><WHILEM><B>
-
-On entry to the subpattern, CURLYX is called. This pushes a CURLYX
-state, which contains the current count, initialised to -1. It also sets
-cur_curlyx to point to this state, with any previous value saved in the
-state block.
-
-CURLYX then jumps straight to the WHILEM op, rather than executing A,
-since the pattern may possibly match zero times (i.e. it's a while {} loop
-rather than a do {} while loop).
-
-Each entry to WHILEM represents a successful match of A. The count in the
-CURLYX block is incremented, another WHILEM state is pushed, and execution
-passes to A or B depending on greediness and the current count.
-
-For example, if matching against the string a1a2a3b (where the aN are
-substrings that match /A/), then the match progresses as follows: (the
-pushed states are interspersed with the bits of strings matched so far):
-
- <CURLYX cnt=-1>
- <CURLYX cnt=0><WHILEM>
- <CURLYX cnt=1><WHILEM> a1 <WHILEM>
- <CURLYX cnt=2><WHILEM> a1 <WHILEM> a2 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> b
-
-(Contrast this with something like CURLYM, which maintains only a single
-backtrack state:
-
- <CURLYM cnt=0> a1
- a1 <CURLYM cnt=1> a2
- a1 a2 <CURLYM cnt=2> a3
- a1 a2 a3 <CURLYM cnt=3> b
-)
-
-Each WHILEM state block marks a point to backtrack to upon partial failure
-of A or B, and also contains some minor state data related to that
-iteration. The CURLYX block, pointed to by cur_curlyx, contains the
-overall state, such as the count, and pointers to the A and B ops.
-
-This is complicated slightly by nested CURLYX/WHILEM's. Since cur_curlyx
-must always point to the *current* CURLYX block, the rules are:
-
-When executing CURLYX, save the old cur_curlyx in the CURLYX state block,
-and set cur_curlyx to point the new block.
-
-When popping the CURLYX block after a successful or unsuccessful match,
-restore the previous cur_curlyx.
-
-When WHILEM is about to execute B, save the current cur_curlyx, and set it
-to the outer one saved in the CURLYX block.
-
-When popping the WHILEM block after a successful or unsuccessful B match,
-restore the previous cur_curlyx.
-
-Here's an example for the pattern (AI* BI)*BO
-I and O refer to inner and outer, C and W refer to CURLYX and WHILEM:
-
-cur_
-curlyx backtrack stack
------- ---------------
-NULL
-CO <CO prev=NULL> <WO>
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-NULL <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi <WO prev=CO> bo
-
-At this point the pattern succeeds, and we work back down the stack to
-clean up, restoring as we go:
-
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO>
-NULL
-
-*******************************************************************/
-
-#define ST st->u.curlyx
-
- case CURLYX: /* start of /A*B/ (for complex A) */
- {
- /* No need to save/restore up to this paren */
- I32 parenfloor = scan->flags;
-
- assert(next); /* keep Coverity happy */
- if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */
- next += ARG(next);
-
- /* XXXX Probably it is better to teach regpush to support
- parenfloor > PL_regsize... */
- if (parenfloor > (I32)*PL_reglastparen)
- parenfloor = *PL_reglastparen; /* Pessimization... */
-
- ST.prev_curlyx= cur_curlyx;
- cur_curlyx = st;
- ST.cp = PL_savestack_ix;
-
- /* these fields contain the state of the current curly.
- * they are accessed by subsequent WHILEMs */
- ST.parenfloor = parenfloor;
- ST.min = ARG1(scan);
- ST.max = ARG2(scan);
- ST.A = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- ST.B = next;
- ST.minmod = minmod;
- minmod = 0;
- ST.count = -1; /* this will be updated by WHILEM */
- ST.lastloc = NULL; /* this will be updated by WHILEM */
-
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYX_end, PREVOPER(next));
- /* NOTREACHED */
- }
-
- case CURLYX_end: /* just finished matching all of A*B */
- cur_curlyx = ST.prev_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case CURLYX_end_fail: /* just failed to match all of A*B */
- regcpblow(ST.cp);
- cur_curlyx = ST.prev_curlyx;
- sayNO;
- /* NOTREACHED */
-
-
-#undef ST
-#define ST st->u.whilem
-
- case WHILEM: /* just matched an A in /A*B/ (for complex A) */
- {
- /* see the discussion above about CURLYX/WHILEM */
- I32 n;
- assert(cur_curlyx); /* keep Coverity happy */
- n = ++cur_curlyx->u.curlyx.count; /* how many A's matched */
- ST.save_lastloc = cur_curlyx->u.curlyx.lastloc;
- ST.cache_offset = 0;
- ST.cache_mask = 0;
-
- PL_reginput = locinput;
-
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: matched %ld out of %ld..%ld\n",
- REPORT_CODE_OFF+depth*2, "", (long)n,
- (long)cur_curlyx->u.curlyx.min,
- (long)cur_curlyx->u.curlyx.max)
- );
-
- /* First just match a string of min A's. */
-
- if (n < cur_curlyx->u.curlyx.min) {
- cur_curlyx->u.curlyx.lastloc = locinput;
- PUSH_STATE_GOTO(WHILEM_A_pre, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
-
- /* If degenerate A matches "", assume A done. */
-
- if (locinput == cur_curlyx->u.curlyx.lastloc) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: empty match detected, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- goto do_whilem_B_max;
- }
-
- /* super-linear cache processing */
-
- if (scan->flags) {
-
- if (!PL_reg_maxiter) {
- /* start the countdown: Postpone detection until we
- * know the match is not *that* much linear. */
- PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4);
- /* possible overflow for long strings and many CURLYX's */
- if (PL_reg_maxiter < 0)
- PL_reg_maxiter = I32_MAX;
- PL_reg_leftiter = PL_reg_maxiter;
- }
-
- if (PL_reg_leftiter-- == 0) {
- /* initialise cache */
- const I32 size = (PL_reg_maxiter + 7)/8;
- if (PL_reg_poscache) {
- if ((I32)PL_reg_poscache_size < size) {
- Renew(PL_reg_poscache, size, char);
- PL_reg_poscache_size = size;
- }
- Zero(PL_reg_poscache, size, char);
- }
- else {
- PL_reg_poscache_size = size;
- Newxz(PL_reg_poscache, size, char);
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%swhilem: Detected a super-linear match, switching on caching%s...\n",
- PL_colors[4], PL_colors[5])
- );
- }
-
- if (PL_reg_leftiter < 0) {
- /* have we already failed at this position? */
- I32 offset, mask;
- offset = (scan->flags & 0xf) - 1
- + (locinput - PL_bostr) * (scan->flags>>4);
- mask = 1 << (offset % 8);
- offset /= 8;
- if (PL_reg_poscache[offset] & mask) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: (cache) already tried at this position...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- sayNO; /* cache records failure */
- }
- ST.cache_offset = offset;
- ST.cache_mask = mask;
- }
- }
-
- /* Prefer B over A for minimal matching. */
-
- if (cur_curlyx->u.curlyx.minmod) {
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- ST.cp = regcppush(ST.save_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_YES_STATE_GOTO(WHILEM_B_min, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
- }
-
- /* Prefer A over B for maximal matching. */
-
- if (n < cur_curlyx->u.curlyx.max) { /* More greed allowed? */
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- cur_curlyx->u.curlyx.lastloc = locinput;
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_max, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
- goto do_whilem_B_max;
- }
- /* NOTREACHED */
-
- case WHILEM_B_min: /* just matched B in a minimal match */
- case WHILEM_B_max: /* just matched B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case WHILEM_B_max_fail: /* just failed to match B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_min_fail: /* just failed to match A in a minimal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- /* FALL THROUGH */
- case WHILEM_A_pre_fail: /* just failed to match even minimal A */
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_max_fail: /* just failed to match A in a maximal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex); /* Restore some previous $<digit>s? */
- PL_reginput = locinput;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s whilem: failed, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- do_whilem_B_max:
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
-
- /* now try B */
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- PUSH_YES_STATE_GOTO(WHILEM_B_max, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
-
- case WHILEM_B_min_fail: /* just failed to match B in a minimal match */
- cur_curlyx = ST.save_curlyx;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
-
- if (cur_curlyx->u.curlyx.count >= cur_curlyx->u.curlyx.max) {
- /* Maximum greed exceeded */
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP),
- "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s trying longer...\n", REPORT_CODE_OFF+depth*2, "")
- );
- /* Try grabbing another A and see if it helps. */
- PL_reginput = locinput;
- cur_curlyx->u.curlyx.lastloc = locinput;
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_min, ST.save_curlyx->u.curlyx.A);
- /* NOTREACHED */
-
-#undef ST
-#define ST st->u.branch
-
- case BRANCHJ: /* /(...|A|...)/ with long next pointer */
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- scan = NEXTOPER(scan);
- /* FALL THROUGH */
-
- case BRANCH: /* /(...|A|...)/ */
- scan = NEXTOPER(scan); /* scan now points to inner node */
- ST.lastparen = *PL_reglastparen;
- ST.next_branch = next;
- REGCP_SET(ST.cp);
- PL_reginput = locinput;
-
- /* Now go into the branch */
- if (has_cutgroup) {
- PUSH_YES_STATE_GOTO(BRANCH_next, scan);
- } else {
- PUSH_STATE_GOTO(BRANCH_next, scan);
- }
- /* NOTREACHED */
- case CUTGROUP:
- PL_reginput = locinput;
- sv_yes_mark = st->u.mark.mark_name = scan->flags ? NULL :
- MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(CUTGROUP_next,next);
- /* NOTREACHED */
- case CUTGROUP_next_fail:
- do_cutgroup = 1;
- no_final = 1;
- if (st->u.mark.mark_name)
- sv_commit = st->u.mark.mark_name;
- sayNO;
- /* NOTREACHED */
- case BRANCH_next:
- sayYES;
- /* NOTREACHED */
- case BRANCH_next_fail: /* that branch failed; try the next, if any */
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- /*dmq: *PL_reglastcloseparen = n; */
- scan = ST.next_branch;
- /* no more branches? */
- if (!scan || (OP(scan) != BRANCH && OP(scan) != BRANCHJ)) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sBRANCH failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- sayNO_SILENT;
- }
- continue; /* execute next BRANCH[J] op */
- /* NOTREACHED */
-
- case MINMOD:
- minmod = 1;
- break;
-
-#undef ST
-#define ST st->u.curlym
-
- case CURLYM: /* /A{m,n}B/ where A is fixed-length */
-
- /* This is an optimisation of CURLYX that enables us to push
- * only a single backtracking state, no matter how many matches
- * there are in {m,n}. It relies on the pattern being constant
- * length, with no parens to influence future backrefs
- */
-
- ST.me = scan;
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
-
- /* if paren positive, emulate an OPEN/CLOSE around A */
- if (ST.me->flags) {
- U32 paren = ST.me->flags;
- if (paren > PL_regsize)
- PL_regsize = paren;
- if (paren > *PL_reglastparen)
- *PL_reglastparen = paren;
- scan += NEXT_OFF(scan); /* Skip former OPEN. */
- }
- ST.A = scan;
- ST.B = next;
- ST.alen = 0;
- ST.count = 0;
- ST.minmod = minmod;
- minmod = 0;
- ST.c1 = CHRTEST_UNINIT;
- REGCP_SET(ST.cp);
-
- if (!(ST.minmod ? ARG1(ST.me) : ARG2(ST.me))) /* min/max */
- goto curlym_do_B;
-
- curlym_do_A: /* execute the A in /A{m,n}B/ */
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYM_A, ST.A); /* match A */
- /* NOTREACHED */
-
- case CURLYM_A: /* we've just matched an A */
- locinput = st->locinput;
- nextchr = UCHARAT(locinput);
-
- ST.count++;
- /* after first match, determine A's length: u.curlym.alen */
- if (ST.count == 1) {
- if (PL_reg_match_utf8) {
- char *s = locinput;
- while (s < PL_reginput) {
- ST.alen++;
- s += UTF8SKIP(s);
- }
- }
- else {
- ST.alen = PL_reginput - locinput;
- }
- if (ST.alen == 0)
- ST.count = ST.minmod ? ARG1(ST.me) : ARG2(ST.me);
- }
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM now matched %"IVdf" times, len=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)), "",
- (IV) ST.count, (IV)ST.alen)
- );
-
- locinput = PL_reginput;
-
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- goto fake_end;
-
- {
- I32 max = (ST.minmod ? ARG1(ST.me) : ARG2(ST.me));
- if ( max == REG_INFTY || ST.count < max )
- goto curlym_do_A; /* try to match another A */
- }
- goto curlym_do_B; /* try to match B */
-
- case CURLYM_A_fail: /* just failed to match an A */
- REGCP_UNWIND(ST.cp);
-
- if (ST.minmod || ST.count < ARG1(ST.me) /* min*/
- || (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags))
- sayNO;
-
- curlym_do_B: /* execute the B in /A{m,n}B/ */
- PL_reginput = locinput;
- if (ST.c1 == CHRTEST_UNINIT) {
- /* calculate c1 and c2 for possible match of 1st char
- * following curly */
- ST.c1 = ST.c2 = CHRTEST_VOID;
- if (HAS_TEXT(ST.B) || JUMPABLE(ST.B)) {
- regnode *text_node = ST.B;
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
- /* this used to be
-
- (HAS_TEXT(text_node) && PL_regkind[OP(text_node)] == EXACT)
-
- But the former is redundant in light of the latter.
-
- if this changes back then the macro for
- IS_TEXT and friends need to change.
- */
- if (PL_regkind[OP(text_node)] == EXACT)
- {
-
- ST.c1 = (U8)*STRING(text_node);
- ST.c2 =
- (IS_TEXTF(text_node))
- ? PL_fold[ST.c1]
- : (IS_TEXTFL(text_node))
- ? PL_fold_locale[ST.c1]
- : ST.c1;
- }
- }
- }
-
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM trying tail with matches=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)),
- "", (IV)ST.count)
- );
- if (ST.c1 != CHRTEST_VOID
- && UCHARAT(PL_reginput) != ST.c1
- && UCHARAT(PL_reginput) != ST.c2)
- {
- /* simulate B failing */
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM Fast bail c1=%"IVdf" c2=%"IVdf"\n",
- (int)(REPORT_CODE_OFF+(depth*2)),"",
- (IV)ST.c1,(IV)ST.c2
- ));
- state_num = CURLYM_B_fail;
- goto reenter_switch;
- }
-
- if (ST.me->flags) {
- /* mark current A as captured */
- I32 paren = ST.me->flags;
- if (ST.count) {
- PL_regoffs[paren].start
- = HOPc(PL_reginput, -ST.alen) - PL_bostr;
- PL_regoffs[paren].end = PL_reginput - PL_bostr;
- /*dmq: *PL_reglastcloseparen = paren; */
- }
- else
- PL_regoffs[paren].end = -1;
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- {
- if (ST.count)
- goto fake_end;
- else
- sayNO;
- }
- }
-
- PUSH_STATE_GOTO(CURLYM_B, ST.B); /* match B */
- /* NOTREACHED */
-
- case CURLYM_B_fail: /* just failed to match a B */
- REGCP_UNWIND(ST.cp);
- if (ST.minmod) {
- I32 max = ARG2(ST.me);
- if (max != REG_INFTY && ST.count == max)
- sayNO;
- goto curlym_do_A; /* try to match a further A */
- }
- /* backtrack one A */
- if (ST.count == ARG1(ST.me) /* min */)
- sayNO;
- ST.count--;
- locinput = HOPc(locinput, -ST.alen);
- goto curlym_do_B; /* try to match B */
-
-#undef ST
-#define ST st->u.curly
-
-#define CURLY_SETPAREN(paren, success) \
- if (paren) { \
- if (success) { \
- PL_regoffs[paren].start = HOPc(locinput, -1) - PL_bostr; \
- PL_regoffs[paren].end = locinput - PL_bostr; \
- *PL_reglastcloseparen = paren; \
- } \
- else \
- PL_regoffs[paren].end = -1; \
- }
-
- case STAR: /* /A*B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 0;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case PLUS: /* /A+B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 1;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case CURLYN: /* /(A){m,n}B/ where A is width 1 */
- ST.paren = scan->flags; /* Which paren to set */
- if (ST.paren > PL_regsize)
- PL_regsize = ST.paren;
- if (ST.paren > *PL_reglastparen)
- *PL_reglastparen = ST.paren;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- ST.min=1;
- ST.max=1;
- }
- scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE);
- goto repeat;
- case CURLY: /* /A{m,n}B/ where A is width 1 */
- ST.paren = 0;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
- repeat:
- /*
- * Lookahead to avoid useless match attempts
- * when we know what character comes next.
- *
- * Used to only do .*x and .*?x, but now it allows
- * for )'s, ('s and (?{ ... })'s to be in the way
- * of the quantifier and the EXACT-like node. -- japhy
- */
-
- if (ST.min > ST.max) /* XXX make this a compile-time check? */
- sayNO;
- if (HAS_TEXT(next) || JUMPABLE(next)) {
- U8 *s;
- regnode *text_node = next;
-
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
-
- if (! HAS_TEXT(text_node))
- ST.c1 = ST.c2 = CHRTEST_VOID;
- else {
- if ( PL_regkind[OP(text_node)] != EXACT ) {
- ST.c1 = ST.c2 = CHRTEST_VOID;
- goto assume_ok_easy;
- }
- else
- s = (U8*)STRING(text_node);
-
- /* Currently we only get here when
-
- PL_rekind[OP(text_node)] == EXACT
-
- if this changes back then the macro for IS_TEXT and
- friends need to change. */
- if (!UTF) {
- ST.c2 = ST.c1 = *s;
- if (IS_TEXTF(text_node))
- ST.c2 = PL_fold[ST.c1];
- else if (IS_TEXTFL(text_node))
- ST.c2 = PL_fold_locale[ST.c1];
- }
- else { /* UTF */
- if (IS_TEXTF(text_node)) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- to_utf8_lower((U8*)s, tmpbuf1, &ulen1);
- to_utf8_upper((U8*)s, tmpbuf2, &ulen2);
-#ifdef EBCDIC
- ST.c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
- ST.c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
-#else
- ST.c1 = utf8n_to_uvuni(tmpbuf1, UTF8_MAXBYTES, 0,
- uniflags);
- ST.c2 = utf8n_to_uvuni(tmpbuf2, UTF8_MAXBYTES, 0,
- uniflags);
-#endif
- }
- else {
- ST.c2 = ST.c1 = utf8n_to_uvchr(s, UTF8_MAXBYTES, 0,
- uniflags);
- }
- }
- }
- }
- else
- ST.c1 = ST.c2 = CHRTEST_VOID;
- assume_ok_easy:
-
- ST.A = scan;
- ST.B = next;
- PL_reginput = locinput;
- if (minmod) {
- minmod = 0;
- if (ST.min && regrepeat(rex, ST.A, ST.min, depth) < ST.min)
- sayNO;
- ST.count = ST.min;
- locinput = PL_reginput;
- REGCP_SET(ST.cp);
- if (ST.c1 == CHRTEST_VOID)
- goto curly_try_B_min;
-
- ST.oldloc = locinput;
-
- /* set ST.maxpos to the furthest point along the
- * string that could possibly match */
- if (ST.max == REG_INFTY) {
- ST.maxpos = PL_regeol - 1;
- if (do_utf8)
- while (UTF8_IS_CONTINUATION(*(U8*)ST.maxpos))
- ST.maxpos--;
- }
- else if (do_utf8) {
- int m = ST.max - ST.min;
- for (ST.maxpos = locinput;
- m >0 && ST.maxpos + UTF8SKIP(ST.maxpos) <= PL_regeol; m--)
- ST.maxpos += UTF8SKIP(ST.maxpos);
- }
- else {
- ST.maxpos = locinput + ST.max - ST.min;
- if (ST.maxpos >= PL_regeol)
- ST.maxpos = PL_regeol - 1;
- }
- goto curly_try_B_min_known;
-
- }
- else {
- ST.count = regrepeat(rex, ST.A, ST.max, depth);
- locinput = PL_reginput;
- if (ST.count < ST.min)
- sayNO;
- if ((ST.count > ST.min)
- && (PL_regkind[OP(ST.B)] == EOL) && (OP(ST.B) != MEOL))
- {
- /* A{m,n} must come at the end of the string, there's
- * no point in backing off ... */
- ST.min = ST.count;
- /* ...except that $ and \Z can match before *and* after
- newline at the end. Consider "\n\n" =~ /\n+\Z\n/.
- We may back off by one in this case. */
- if (UCHARAT(PL_reginput - 1) == '\n' && OP(ST.B) != EOS)
- ST.min--;
- }
- REGCP_SET(ST.cp);
- goto curly_try_B_max;
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_known_fail:
- /* failed to find B in a non-greedy match where c1,c2 valid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- PL_reginput = locinput; /* Could be reset... */
- REGCP_UNWIND(ST.cp);
- /* Couldn't or didn't -- move forward. */
- ST.oldloc = locinput;
- if (do_utf8)
- locinput += UTF8SKIP(locinput);
- else
- locinput++;
- ST.count++;
- curly_try_B_min_known:
- /* find the next place where 'B' could work, then call B */
- {
- int n;
- if (do_utf8) {
- n = (ST.oldloc == locinput) ? 0 : 1;
- if (ST.c1 == ST.c2) {
- STRLEN len;
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos &&
- utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags) != (UV)ST.c1) {
- locinput += len;
- n++;
- }
- }
- else {
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos) {
- STRLEN len;
- const UV c = utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags);
- if (c == (UV)ST.c1 || c == (UV)ST.c2)
- break;
- locinput += len;
- n++;
- }
- }
- }
- else {
- if (ST.c1 == ST.c2) {
- while (locinput <= ST.maxpos &&
- UCHARAT(locinput) != ST.c1)
- locinput++;
- }
- else {
- while (locinput <= ST.maxpos
- && UCHARAT(locinput) != ST.c1
- && UCHARAT(locinput) != ST.c2)
- locinput++;
- }
- n = locinput - ST.oldloc;
- }
- if (locinput > ST.maxpos)
- sayNO;
- /* PL_reginput == oldloc now */
- if (n) {
- ST.count += n;
- if (regrepeat(rex, ST.A, n, depth) < n)
- sayNO;
- }
- PL_reginput = locinput;
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min_known, ST.B);
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_fail:
- /* failed to find B in a non-greedy match where c1,c2 invalid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* failed -- move forward one */
- PL_reginput = locinput;
- if (regrepeat(rex, ST.A, 1, depth)) {
- ST.count++;
- locinput = PL_reginput;
- if (ST.count <= ST.max || (ST.max == REG_INFTY &&
- ST.count > 0)) /* count overflow ? */
- {
- curly_try_B_min:
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min, ST.B);
- }
- }
- sayNO;
- /* NOTREACHED */
-
-
- curly_try_B_max:
- /* a successful greedy match: now try to match B */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- {
- UV c = 0;
- if (ST.c1 != CHRTEST_VOID)
- c = do_utf8 ? utf8n_to_uvchr((U8*)PL_reginput,
- UTF8_MAXBYTES, 0, uniflags)
- : (UV) UCHARAT(PL_reginput);
- /* If it could work, try it. */
- if (ST.c1 == CHRTEST_VOID || c == (UV)ST.c1 || c == (UV)ST.c2) {
- CURLY_SETPAREN(ST.paren, ST.count);
- PUSH_STATE_GOTO(CURLY_B_max, ST.B);
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case CURLY_B_max_fail:
- /* failed to find B in a greedy match */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* back up. */
- if (--ST.count < ST.min)
- sayNO;
- PL_reginput = locinput = HOPc(locinput, -1);
- goto curly_try_B_max;
-
-#undef ST
-
- case END:
- fake_end:
- if (cur_eval) {
- /* we've just finished A in /(??{A})B/; now continue with B */
- I32 tmpix;
- st->u.eval.toggle_reg_flags
- = cur_eval->u.eval.toggle_reg_flags;
- PL_reg_flags ^= st->u.eval.toggle_reg_flags;
-
- st->u.eval.prev_rex = rex_sv; /* inner */
- SETREX(rex_sv,cur_eval->u.eval.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- cur_curlyx = cur_eval->u.eval.prev_curlyx;
- ReREFCNT_inc(rex_sv);
- st->u.eval.cp = regcppush(0); /* Save *all* the positions. */
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- REGCP_SET(st->u.eval.lastcp);
- PL_reginput = locinput;
-
- /* Restore parens of the outer rex without popping the
- * savestack */
- tmpix = PL_savestack_ix;
- PL_savestack_ix = cur_eval->u.eval.lastcp;
- regcppop(rex);
- PL_savestack_ix = tmpix;
-
- st->u.eval.prev_eval = cur_eval;
- cur_eval = cur_eval->u.eval.prev_eval;
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log, "%*s EVAL trying tail ... %"UVxf"\n",
- REPORT_CODE_OFF+depth*2, "",PTR2UV(cur_eval)););
- if ( nochange_depth )
- nochange_depth--;
-
- PUSH_YES_STATE_GOTO(EVAL_AB,
- st->u.eval.prev_eval->u.eval.B); /* match B */
- }
-
- if (locinput < reginfo->till) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n",
- PL_colors[4],
- (long)(locinput - PL_reg_starttry),
- (long)(reginfo->till - PL_reg_starttry),
- PL_colors[5]));
-
- sayNO_SILENT; /* Cannot match: too short. */
- }
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
- case SUCCEED: /* successful SUSPEND/UNLESSM/IFMATCH/CURLYM */
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %ssubpattern success...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]));
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
-#undef ST
-#define ST st->u.ifmatch
-
- case SUSPEND: /* (?>A) */
- ST.wanted = 1;
- PL_reginput = locinput;
- goto do_ifmatch;
-
- case UNLESSM: /* -ve lookaround: (?!A), or with flags, (?<!A) */
- ST.wanted = 0;
- goto ifmatch_trivial_fail_test;
-
- case IFMATCH: /* +ve lookaround: (?=A), or with flags, (?<=A) */
- ST.wanted = 1;
- ifmatch_trivial_fail_test:
- if (scan->flags) {
- char * const s = HOPBACKc(locinput, scan->flags);
- if (!s) {
- /* trivial fail */
- if (logical) {
- logical = 0;
- sw = 1 - (bool)ST.wanted;
- }
- else if (ST.wanted)
- sayNO;
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- }
- PL_reginput = s;
- }
- else
- PL_reginput = locinput;
-
- do_ifmatch:
- ST.me = scan;
- ST.logical = logical;
- logical = 0; /* XXX: reset state of logical once it has been saved into ST */
-
- /* execute body of (?...A) */
- PUSH_YES_STATE_GOTO(IFMATCH_A, NEXTOPER(NEXTOPER(scan)));
- /* NOTREACHED */
-
- case IFMATCH_A_fail: /* body of (?...A) failed */
- ST.wanted = !ST.wanted;
- /* FALL THROUGH */
-
- case IFMATCH_A: /* body of (?...A) succeeded */
- if (ST.logical) {
- sw = (bool)ST.wanted;
- }
- else if (!ST.wanted)
- sayNO;
-
- if (OP(ST.me) == SUSPEND)
- locinput = PL_reginput;
- else {
- locinput = PL_reginput = st->locinput;
- nextchr = UCHARAT(locinput);
- }
- scan = ST.me + ARG(ST.me);
- if (scan == ST.me)
- scan = NULL;
- continue; /* execute B */
-
-#undef ST
-
- case LONGJMP:
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- case COMMIT:
- reginfo->cutpoint = PL_regeol;
- /* FALLTHROUGH */
- case PRUNE:
- PL_reginput = locinput;
- if (!scan->flags)
- sv_yes_mark = sv_commit = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(COMMIT_next,next);
- /* NOTREACHED */
- case COMMIT_next_fail:
- no_final = 1;
- /* FALLTHROUGH */
- case OPFAIL:
- sayNO;
- /* NOTREACHED */
-
-#define ST st->u.mark
- case MARKPOINT:
- ST.prev_mark = mark_state;
- ST.mark_name = sv_commit = sv_yes_mark
- = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- mark_state = st;
- ST.mark_loc = PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(MARKPOINT_next,next);
- /* NOTREACHED */
- case MARKPOINT_next:
- mark_state = ST.prev_mark;
- sayYES;
- /* NOTREACHED */
- case MARKPOINT_next_fail:
- if (popmark && sv_eq(ST.mark_name,popmark))
- {
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- popmark = NULL; /* we found our mark */
- sv_commit = ST.mark_name;
-
- DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,
- "%*s %ssetting cutpoint to mark:%"SVf"...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], SVfARG(sv_commit), PL_colors[5]);
- });
- }
- mark_state = ST.prev_mark;
- sv_yes_mark = mark_state ?
- mark_state->u.mark.mark_name : NULL;
- sayNO;
- /* NOTREACHED */
- case SKIP:
- PL_reginput = locinput;
- if (scan->flags) {
- /* (*SKIP) : if we fail we cut here*/
- ST.mark_name = NULL;
- ST.mark_loc = locinput;
- PUSH_STATE_GOTO(SKIP_next,next);
- } else {
- /* (*SKIP:NAME) : if there is a (*MARK:NAME) fail where it was,
- otherwise do nothing. Meaning we need to scan
- */
- regmatch_state *cur = mark_state;
- SV *find = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
-
- while (cur) {
- if ( sv_eq( cur->u.mark.mark_name,
- find ) )
- {
- ST.mark_name = find;
- PUSH_STATE_GOTO( SKIP_next, next );
- }
- cur = cur->u.mark.prev_mark;
- }
- }
- /* Didn't find our (*MARK:NAME) so ignore this (*SKIP:NAME) */
- break;
- case SKIP_next_fail:
- if (ST.mark_name) {
- /* (*CUT:NAME) - Set up to search for the name as we
- collapse the stack*/
- popmark = ST.mark_name;
- } else {
- /* (*CUT) - No name, we cut here.*/
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- /* but we set sv_commit to latest mark_name if there
- is one so they can test to see how things lead to this
- cut */
- if (mark_state)
- sv_commit=mark_state->u.mark.mark_name;
- }
- no_final = 1;
- sayNO;
- /* NOTREACHED */
-#undef ST
- case FOLDCHAR:
- n = ARG(scan);
- if ( n == (U32)what_len_TRICKYFOLD(locinput,do_utf8,ln) ) {
- locinput += ln;
- } else if ( 0xDF == n && !do_utf8 && !UTF ) {
- sayNO;
- } else {
- U8 folded[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const char * const l = locinput;
- char *e = PL_regeol;
- to_uni_fold(n, folded, &foldlen);
-
- if (ibcmp_utf8((const char*) folded, 0, foldlen, 1,
- l, &e, 0, do_utf8)) {
- sayNO;
- }
- locinput = e;
- }
- nextchr = UCHARAT(locinput);
- break;
- case LNBREAK:
- if ((n=is_LNBREAK(locinput,do_utf8))) {
- locinput += n;
- nextchr = UCHARAT(locinput);
- } else
- sayNO;
- break;
-
-#define CASE_CLASS(nAmE) \
- case nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- locinput += n; \
- nextchr = UCHARAT(locinput); \
- } else \
- sayNO; \
- break; \
- case N##nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- sayNO; \
- } else { \
- locinput += UTF8SKIP(locinput); \
- nextchr = UCHARAT(locinput); \
- } \
- break
-
- CASE_CLASS(VERTWS);
- CASE_CLASS(HORIZWS);
-#undef CASE_CLASS
-
- default:
- PerlIO_printf(Perl_error_log, "%"UVxf" %d\n",
- PTR2UV(scan), OP(scan));
- Perl_croak(aTHX_ "regexp memory corruption");
-
- } /* end switch */
-
- /* switch break jumps here */
- scan = next; /* prepare to execute the next op and ... */
- continue; /* ... jump back to the top, reusing st */
- /* NOTREACHED */
-
- push_yes_state:
- /* push a state that backtracks on success */
- st->u.yes.prev_yes_state = yes_state;
- yes_state = st;
- /* FALL THROUGH */
- push_state:
- /* push a new regex state, then continue at scan */
- {
- regmatch_state *newst;
-
- DEBUG_STACK_r({
- regmatch_state *cur = st;
- regmatch_state *curyes = yes_state;
- int curd = depth;
- regmatch_slab *slab = PL_regmatch_slab;
- for (;curd > -1;cur--,curd--) {
- if (cur < SLAB_FIRST(slab)) {
- slab = slab->prev;
- cur = SLAB_LAST(slab);
- }
- PerlIO_printf(Perl_error_log, "%*s#%-3d %-10s %s\n",
- REPORT_CODE_OFF + 2 + depth * 2,"",
- curd, PL_reg_name[cur->resume_state],
- (curyes == cur) ? "yes" : ""
- );
- if (curyes == cur)
- curyes = cur->u.yes.prev_yes_state;
- }
- } else
- DEBUG_STATE_pp("push")
- );
- depth++;
- st->locinput = locinput;
- newst = st+1;
- if (newst > SLAB_LAST(PL_regmatch_slab))
- newst = S_push_slab(aTHX);
- PL_regmatch_state = newst;
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- st = newst;
- continue;
- /* NOTREACHED */
- }
- }
-
- /*
- * We get here only if there's trouble -- normally "case END" is
- * the terminating point.
- */
- Perl_croak(aTHX_ "corrupted regexp pointers");
- /*NOTREACHED*/
- sayNO;
-
-yes:
- if (yes_state) {
- /* we have successfully completed a subexpression, but we must now
- * pop to the state marked by yes_state and continue from there */
- assert(st != yes_state);
-#ifdef DEBUGGING
- while (st != yes_state) {
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- DEBUG_STATE_r({
- if (no_final) {
- DEBUG_STATE_pp("pop (no final)");
- } else {
- DEBUG_STATE_pp("pop (yes)");
- }
- });
- depth--;
- }
-#else
- while (yes_state < SLAB_FIRST(PL_regmatch_slab)
- || yes_state > SLAB_LAST(PL_regmatch_slab))
- {
- /* not in this slab, pop slab */
- depth -= (st - SLAB_FIRST(PL_regmatch_slab) + 1);
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- depth -= (st - yes_state);
-#endif
- st = yes_state;
- yes_state = st->u.yes.prev_yes_state;
- PL_regmatch_state = st;
-
- if (no_final) {
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
- }
- state_num = st->resume_state + no_final;
- goto reenter_switch;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n",
- PL_colors[4], PL_colors[5]));
-
- if (PL_reg_eval_set) {
- /* each successfully executed (?{...}) block does the equivalent of
- * local $^R = do {...}
- * When popping the save stack, all these locals would be undone;
- * bypass this by setting the outermost saved $^R to the latest
- * value */
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- }
- result = 1;
- goto final_exit;
-
-no:
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], PL_colors[5])
- );
-
-no_silent:
- if (no_final) {
- if (yes_state) {
- goto yes;
- } else {
- goto final_exit;
- }
- }
- if (depth) {
- /* there's a previous state to backtrack to */
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- PL_regmatch_state = st;
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
-
- DEBUG_STATE_pp("pop");
- depth--;
- if (yes_state == st)
- yes_state = st->u.yes.prev_yes_state;
-
- state_num = st->resume_state + 1; /* failure = success + 1 */
- goto reenter_switch;
- }
- result = 0;
-
- final_exit:
- if (rex->intflags & PREGf_VERBARG_SEEN) {
- SV *sv_err = get_sv("REGERROR", 1);
- SV *sv_mrk = get_sv("REGMARK", 1);
- if (result) {
- sv_commit = &PL_sv_no;
- if (!sv_yes_mark)
- sv_yes_mark = &PL_sv_yes;
- } else {
- if (!sv_commit)
- sv_commit = &PL_sv_yes;
- sv_yes_mark = &PL_sv_no;
- }
- sv_setsv(sv_err, sv_commit);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- /* clean up; in particular, free all slabs above current one */
- LEAVE_SCOPE(oldsave);
-
- return result;
-}
-
-/*
- - regrepeat - repeatedly match something simple, report how many
- */
-/*
- * [This routine now assumes that it will only match on things of length 1.
- * That was true before, but now we assume scan - reginput is the count,
- * rather than incrementing count on every character. [Er, except utf8.]]
- */
-STATIC I32
-S_regrepeat(pTHX_ const regexp *prog, const regnode *p, I32 max, int depth)
-{
- dVAR;
- register char *scan;
- register I32 c;
- register char *loceol = PL_regeol;
- register I32 hardcount = 0;
- register bool do_utf8 = PL_reg_match_utf8;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_REGREPEAT;
-
- scan = PL_reginput;
- if (max == REG_INFTY)
- max = I32_MAX;
- else if (max < loceol - scan)
- loceol = scan + max;
- switch (OP(p)) {
- case REG_ANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max && *scan != '\n') {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && *scan != '\n')
- scan++;
- }
- break;
- case SANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- }
- else
- scan = loceol;
- break;
- case CANY:
- scan = loceol;
- break;
- case EXACT: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol && UCHARAT(scan) == c)
- scan++;
- break;
- case EXACTF: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c]))
- scan++;
- break;
- case EXACTFL: /* length of string is 1 */
- PL_reg_flags |= RF_tainted;
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c]))
- scan++;
- break;
- case ANYOF:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- reginclass(prog, p, (U8*)scan, 0, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && REGINCLASS(prog, p, (U8*)scan))
- scan++;
- }
- break;
- case ALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM(*scan))
- scan++;
- }
- break;
- case ALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM_LC(*scan))
- scan++;
- }
- break;
- case NALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM(*scan))
- scan++;
- }
- break;
- case NALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM_LC(*scan))
- scan++;
- }
- break;
- case SPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE(*scan))
- scan++;
- }
- break;
- case SPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE_LC(*scan))
- scan++;
- }
- break;
- case NSPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE(*scan))
- scan++;
- }
- break;
- case NSPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE_LC(*scan))
- scan++;
- }
- break;
- case DIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isDIGIT(*scan))
- scan++;
- }
- break;
- case NDIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isDIGIT(*scan))
- scan++;
- }
- case LNBREAK:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_LNBREAK_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- /*
- LNBREAK can match two latin chars, which is ok,
- because we have a null terminated string, but we
- have to use hardcount in this situation
- */
- while (scan < loceol && (c=is_LNBREAK_latin1(scan))) {
- scan+=c;
- hardcount++;
- }
- }
- break;
- case HORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_HORIZWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_HORIZWS_latin1(scan))
- scan++;
- }
- break;
- case NHORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_HORIZWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_HORIZWS_latin1(scan))
- scan++;
-
- }
- break;
- case VERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_VERTWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
- case NVERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_VERTWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
-
- default: /* Called on something of 0 width. */
- break; /* So match right here or not at all. */
- }
-
- if (hardcount)
- c = hardcount;
- else
- c = scan - PL_reginput;
- PL_reginput = scan;
-
- DEBUG_r({
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, p);
- PerlIO_printf(Perl_debug_log,
- "%*s %s can match %"IVdf" times out of %"IVdf"...\n",
- REPORT_CODE_OFF + depth*2, "", SvPVX_const(prop),(IV)c,(IV)max);
- });
- });
-
- return(c);
-}
-
-
-#if !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION)
-/*
-- regclass_swash - prepare the utf8 swash
-*/
-
-SV *
-Perl_regclass_swash(pTHX_ const regexp *prog, register const regnode* node, bool doinit, SV** listsvp, SV **altsvp)
-{
- dVAR;
- SV *sw = NULL;
- SV *si = NULL;
- SV *alt = NULL;
- RXi_GET_DECL(prog,progi);
- const struct reg_data * const data = prog ? progi->data : NULL;
-
- PERL_ARGS_ASSERT_REGCLASS_SWASH;
-
- if (data && data->count) {
- const U32 n = ARG(node);
-
- if (data->what[n] == 's') {
- SV * const rv = MUTABLE_SV(data->data[n]);
- AV * const av = MUTABLE_AV(SvRV(rv));
- SV **const ary = AvARRAY(av);
- SV **a, **b;
-
- /* See the end of regcomp.c:S_regclass() for
- * documentation of these array elements. */
-
- si = *ary;
- a = SvROK(ary[1]) ? &ary[1] : NULL;
- b = SvTYPE(ary[2]) == SVt_PVAV ? &ary[2] : NULL;
-
- if (a)
- sw = *a;
- else if (si && doinit) {
- sw = swash_init("utf8", "", si, 1, 0);
- (void)av_store(av, 1, sw);
- }
- if (b)
- alt = *b;
- }
- }
-
- if (listsvp)
- *listsvp = si;
- if (altsvp)
- *altsvp = alt;
-
- return sw;
-}
-#endif
-
-/*
- - reginclass - determine if a character falls into a character class
-
- The n is the ANYOF regnode, the p is the target string, lenp
- is pointer to the maximum length of how far to go in the p
- (if the lenp is zero, UTF8SKIP(p) is used),
- do_utf8 tells whether the target string is in UTF-8.
-
- */
-
-STATIC bool
-S_reginclass(pTHX_ const regexp *prog, register const regnode *n, register const U8* p, STRLEN* lenp, register bool do_utf8)
-{
- dVAR;
- const char flags = ANYOF_FLAGS(n);
- bool match = FALSE;
- UV c = *p;
- STRLEN len = 0;
- STRLEN plen;
-
- PERL_ARGS_ASSERT_REGINCLASS;
-
- if (do_utf8 && !UTF8_IS_INVARIANT(c)) {
- c = utf8n_to_uvchr(p, UTF8_MAXBYTES, &len,
- (UTF8_ALLOW_DEFAULT & UTF8_ALLOW_ANYUV) | UTF8_CHECK_ONLY);
- /* see [perl #37836] for UTF8_ALLOW_ANYUV */
- if (len == (STRLEN)-1)
- Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)");
- }
-
- plen = lenp ? *lenp : UNISKIP(NATIVE_TO_UNI(c));
- if (do_utf8 || (flags & ANYOF_UNICODE)) {
- if (lenp)
- *lenp = 0;
- if (do_utf8 && !ANYOF_RUNTIME(n)) {
- if (len != (STRLEN)-1 && c < 256 && ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- }
- if (!match && do_utf8 && (flags & ANYOF_UNICODE_ALL) && c >= 256)
- match = TRUE;
- if (!match) {
- AV *av;
- SV * const sw = regclass_swash(prog, n, TRUE, 0, (SV**)&av);
-
- if (sw) {
- U8 * utf8_p;
- if (do_utf8) {
- utf8_p = (U8 *) p;
- } else {
- STRLEN len = 1;
- utf8_p = bytes_to_utf8(p, &len);
- }
- if (swash_fetch(sw, utf8_p, 1))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- if (!match && lenp && av) {
- I32 i;
- for (i = 0; i <= av_len(av); i++) {
- SV* const sv = *av_fetch(av, i, FALSE);
- STRLEN len;
- const char * const s = SvPV_const(sv, len);
- if (len <= plen && memEQ(s, (char*)utf8_p, len)) {
- *lenp = len;
- match = TRUE;
- break;
- }
- }
- }
- if (!match) {
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1];
-
- STRLEN tmplen;
- to_utf8_fold(utf8_p, tmpbuf, &tmplen);
- if (swash_fetch(sw, tmpbuf, 1))
- match = TRUE;
- }
- }
-
- /* If we allocated a string above, free it */
- if (! do_utf8) Safefree(utf8_p);
- }
- }
- if (match && lenp && *lenp == 0)
- *lenp = UNISKIP(NATIVE_TO_UNI(c));
- }
- if (!match && c < 256) {
- if (ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- U8 f;
-
- if (flags & ANYOF_LOCALE) {
- PL_reg_flags |= RF_tainted;
- f = PL_fold_locale[c];
- }
- else
- f = PL_fold[c];
- if (f != c && ANYOF_BITMAP_TEST(n, f))
- match = TRUE;
- }
-
- if (!match && (flags & ANYOF_CLASS)) {
- PL_reg_flags |= RF_tainted;
- if (
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK(c))
- ) /* How's that for a conditional? */
- {
- match = TRUE;
- }
- }
- }
-
- return (flags & ANYOF_INVERT) ? !match : match;
-}
-
-STATIC U8 *
-S_reghop3(U8 *s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-
-#ifdef XXX_dmq
-/* there are a bunch of places where we use two reghop3's that should
- be replaced with this routine. but since thats not done yet
- we ifdef it out - dmq
-*/
-STATIC U8 *
-S_reghop4(U8 *s, I32 off, const U8* llim, const U8* rlim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP4;
-
- if (off >= 0) {
- while (off-- && s < rlim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > llim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > llim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-#endif
-
-STATIC U8 *
-S_reghopmaybe3(U8* s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOPMAYBE3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- if (off >= 0)
- return NULL;
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- if (off <= 0)
- return NULL;
- }
- return s;
-}
-
-static void
-restore_pos(pTHX_ void *arg)
-{
- dVAR;
- regexp * const rex = (regexp *)arg;
- if (PL_reg_eval_set) {
- if (PL_reg_oldsaved) {
- rex->subbeg = PL_reg_oldsaved;
- rex->sublen = PL_reg_oldsavedlen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- rex->saved_copy = PL_nrs;
-#endif
- RXp_MATCH_COPIED_on(rex);
- }
- PL_reg_magic->mg_len = PL_reg_oldpos;
- PL_reg_eval_set = 0;
- PL_curpm = PL_reg_oldcurpm;
- }
-}
-
-STATIC void
-S_to_utf8_substr(pTHX_ register regexp *prog)
-{
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_UTF8_SUBSTR;
-
- do {
- if (prog->substrs->data[i].substr
- && !prog->substrs->data[i].utf8_substr) {
- SV* const sv = newSVsv(prog->substrs->data[i].substr);
- prog->substrs->data[i].utf8_substr = sv;
- sv_utf8_upgrade(sv);
- if (SvVALID(prog->substrs->data[i].substr)) {
- const U8 flags = BmFLAGS(prog->substrs->data[i].substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- /* Whilst this makes the SV technically "invalid" (as its
- buffer is no longer followed by "\0") when fbm_compile()
- adds the "\n" back, a "\0" is restored. */
- }
- fbm_compile(sv, flags);
- }
- if (prog->substrs->data[i].substr == prog->check_substr)
- prog->check_utf8 = sv;
- }
- } while (i--);
-}
-
-STATIC void
-S_to_byte_substr(pTHX_ register regexp *prog)
-{
- dVAR;
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_BYTE_SUBSTR;
-
- do {
- if (prog->substrs->data[i].utf8_substr
- && !prog->substrs->data[i].substr) {
- SV* sv = newSVsv(prog->substrs->data[i].utf8_substr);
- if (sv_utf8_downgrade(sv, TRUE)) {
- if (SvVALID(prog->substrs->data[i].utf8_substr)) {
- const U8 flags
- = BmFLAGS(prog->substrs->data[i].utf8_substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- }
- fbm_compile(sv, flags);
- }
- } else {
- SvREFCNT_dec(sv);
- sv = &PL_sv_undef;
- }
- prog->substrs->data[i].substr = sv;
- if (prog->substrs->data[i].utf8_substr == prog->check_utf8)
- prog->check_substr = sv;
- }
- } while (i--);
-}
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regcomp.c
- */
-
-/*
- * 'A fair jaw-cracker dwarf-language must be.' --Samwise Gamgee
- *
- * [p.285 of _The Lord of the Rings_, II/iii: "The Ring Goes South"]
- */
-
-/* This file contains functions for compiling a regular expression. See
- * also regexec.c which funnily enough, contains functions for executing
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_comp.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
-
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGCOMP_C
-#include "perl.h"
-
-#ifndef PERL_IN_XSUB_RE
-#include "re_defs.h"
-#endif
-
-#define REG_COMP_C
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#ifdef op
-#undef op
-#endif /* op */
-
-#ifdef MSDOS
-# if defined(BUGGY_MSC6)
- /* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */
-# pragma optimize("a",off)
- /* But MSC 6.00A is happy with 'w', for aliases only across function calls*/
-# pragma optimize("w",on )
-# endif /* BUGGY_MSC6 */
-#endif /* MSDOS */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-typedef struct RExC_state_t {
- U32 flags; /* are we folding, multilining? */
- char *precomp; /* uncompiled string. */
- REGEXP *rx_sv; /* The SV that is the regexp. */
- regexp *rx; /* perl core regexp structure */
- regexp_internal *rxi; /* internal data for regexp object pprivate field */
- char *start; /* Start of input for compile */
- char *end; /* End of input for compile */
- char *parse; /* Input-scan pointer. */
- I32 whilem_seen; /* number of WHILEM in this expr */
- regnode *emit_start; /* Start of emitted-code area */
- regnode *emit_bound; /* First regnode outside of the allocated space */
- regnode *emit; /* Code-emit pointer; ®dummy = don't = compiling */
- I32 naughty; /* How bad is this pattern? */
- I32 sawback; /* Did we see \1, ...? */
- U32 seen;
- I32 size; /* Code size. */
- I32 npar; /* Capture buffer count, (OPEN). */
- I32 cpar; /* Capture buffer count, (CLOSE). */
- I32 nestroot; /* root parens we are in - used by accept */
- I32 extralen;
- I32 seen_zerolen;
- I32 seen_evals;
- regnode **open_parens; /* pointers to open parens */
- regnode **close_parens; /* pointers to close parens */
- regnode *opend; /* END node in program */
- I32 utf8; /* whether the pattern is utf8 or not */
- I32 orig_utf8; /* whether the pattern was originally in utf8 */
- /* XXX use this for future optimisation of case
- * where pattern must be upgraded to utf8. */
- HV *charnames; /* cache of named sequences */
- HV *paren_names; /* Paren names */
-
- regnode **recurse; /* Recurse regops */
- I32 recurse_count; /* Number of recurse regops */
-#if ADD_TO_REGEXEC
- char *starttry; /* -Dr: where regtry was called. */
-#define RExC_starttry (pRExC_state->starttry)
-#endif
-#ifdef DEBUGGING
- const char *lastparse;
- I32 lastnum;
- AV *paren_name_list; /* idx -> name */
-#define RExC_lastparse (pRExC_state->lastparse)
-#define RExC_lastnum (pRExC_state->lastnum)
-#define RExC_paren_name_list (pRExC_state->paren_name_list)
-#endif
-} RExC_state_t;
-
-#define RExC_flags (pRExC_state->flags)
-#define RExC_precomp (pRExC_state->precomp)
-#define RExC_rx_sv (pRExC_state->rx_sv)
-#define RExC_rx (pRExC_state->rx)
-#define RExC_rxi (pRExC_state->rxi)
-#define RExC_start (pRExC_state->start)
-#define RExC_end (pRExC_state->end)
-#define RExC_parse (pRExC_state->parse)
-#define RExC_whilem_seen (pRExC_state->whilem_seen)
-#ifdef RE_TRACK_PATTERN_OFFSETS
-#define RExC_offsets (pRExC_state->rxi->u.offsets) /* I am not like the others */
-#endif
-#define RExC_emit (pRExC_state->emit)
-#define RExC_emit_start (pRExC_state->emit_start)
-#define RExC_emit_bound (pRExC_state->emit_bound)
-#define RExC_naughty (pRExC_state->naughty)
-#define RExC_sawback (pRExC_state->sawback)
-#define RExC_seen (pRExC_state->seen)
-#define RExC_size (pRExC_state->size)
-#define RExC_npar (pRExC_state->npar)
-#define RExC_nestroot (pRExC_state->nestroot)
-#define RExC_extralen (pRExC_state->extralen)
-#define RExC_seen_zerolen (pRExC_state->seen_zerolen)
-#define RExC_seen_evals (pRExC_state->seen_evals)
-#define RExC_utf8 (pRExC_state->utf8)
-#define RExC_orig_utf8 (pRExC_state->orig_utf8)
-#define RExC_charnames (pRExC_state->charnames)
-#define RExC_open_parens (pRExC_state->open_parens)
-#define RExC_close_parens (pRExC_state->close_parens)
-#define RExC_opend (pRExC_state->opend)
-#define RExC_paren_names (pRExC_state->paren_names)
-#define RExC_recurse (pRExC_state->recurse)
-#define RExC_recurse_count (pRExC_state->recurse_count)
-
-
-#define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?')
-#define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \
- ((*s) == '{' && regcurly(s)))
-
-#ifdef SPSTART
-#undef SPSTART /* dratted cpp namespace... */
-#endif
-/*
- * Flags to be passed up and down.
- */
-#define WORST 0 /* Worst case. */
-#define HASWIDTH 0x01 /* Known to match non-null strings. */
-#define SIMPLE 0x02 /* Simple enough to be STAR/PLUS operand. */
-#define SPSTART 0x04 /* Starts with * or +. */
-#define TRYAGAIN 0x08 /* Weeded out a declaration. */
-#define POSTPONED 0x10 /* (?1),(?&name), (??{...}) or similar */
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-RExC_emit_start) : -1)
-
-/* whether trie related optimizations are enabled */
-#if PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION
-#define TRIE_STUDY_OPT
-#define FULL_TRIE_STUDY
-#define TRIE_STCLASS
-#endif
-
-
-
-#define PBYTE(u8str,paren) ((U8*)(u8str))[(paren) >> 3]
-#define PBITVAL(paren) (1 << ((paren) & 7))
-#define PAREN_TEST(u8str,paren) ( PBYTE(u8str,paren) & PBITVAL(paren))
-#define PAREN_SET(u8str,paren) PBYTE(u8str,paren) |= PBITVAL(paren)
-#define PAREN_UNSET(u8str,paren) PBYTE(u8str,paren) &= (~PBITVAL(paren))
-
-
-/* About scan_data_t.
-
- During optimisation we recurse through the regexp program performing
- various inplace (keyhole style) optimisations. In addition study_chunk
- and scan_commit populate this data structure with information about
- what strings MUST appear in the pattern. We look for the longest
- string that must appear for at a fixed location, and we look for the
- longest string that may appear at a floating location. So for instance
- in the pattern:
-
- /FOO[xX]A.*B[xX]BAR/
-
- Both 'FOO' and 'A' are fixed strings. Both 'B' and 'BAR' are floating
- strings (because they follow a .* construct). study_chunk will identify
- both FOO and BAR as being the longest fixed and floating strings respectively.
-
- The strings can be composites, for instance
-
- /(f)(o)(o)/
-
- will result in a composite fixed substring 'foo'.
-
- For each string some basic information is maintained:
-
- - offset or min_offset
- This is the position the string must appear at, or not before.
- It also implicitly (when combined with minlenp) tells us how many
- character must match before the string we are searching.
- Likewise when combined with minlenp and the length of the string
- tells us how many characters must appear after the string we have
- found.
-
- - max_offset
- Only used for floating strings. This is the rightmost point that
- the string can appear at. Ifset to I32 max it indicates that the
- string can occur infinitely far to the right.
-
- - minlenp
- A pointer to the minimum length of the pattern that the string
- was found inside. This is important as in the case of positive
- lookahead or positive lookbehind we can have multiple patterns
- involved. Consider
-
- /(?=FOO).*F/
-
- The minimum length of the pattern overall is 3, the minimum length
- of the lookahead part is 3, but the minimum length of the part that
- will actually match is 1. So 'FOO's minimum length is 3, but the
- minimum length for the F is 1. This is important as the minimum length
- is used to determine offsets in front of and behind the string being
- looked for. Since strings can be composites this is the length of the
- pattern at the time it was commited with a scan_commit. Note that
- the length is calculated by study_chunk, so that the minimum lengths
- are not known until the full pattern has been compiled, thus the
- pointer to the value.
-
- - lookbehind
-
- In the case of lookbehind the string being searched for can be
- offset past the start point of the final matching string.
- If this value was just blithely removed from the min_offset it would
- invalidate some of the calculations for how many chars must match
- before or after (as they are derived from min_offset and minlen and
- the length of the string being searched for).
- When the final pattern is compiled and the data is moved from the
- scan_data_t structure into the regexp structure the information
- about lookbehind is factored in, with the information that would
- have been lost precalculated in the end_shift field for the
- associated string.
-
- The fields pos_min and pos_delta are used to store the minimum offset
- and the delta to the maximum offset at the current point in the pattern.
-
-*/
-
-typedef struct scan_data_t {
- /*I32 len_min; unused */
- /*I32 len_delta; unused */
- I32 pos_min;
- I32 pos_delta;
- SV *last_found;
- I32 last_end; /* min value, <0 unless valid. */
- I32 last_start_min;
- I32 last_start_max;
- SV **longest; /* Either &l_fixed, or &l_float. */
- SV *longest_fixed; /* longest fixed string found in pattern */
- I32 offset_fixed; /* offset where it starts */
- I32 *minlen_fixed; /* pointer to the minlen relevent to the string */
- I32 lookbehind_fixed; /* is the position of the string modfied by LB */
- SV *longest_float; /* longest floating string found in pattern */
- I32 offset_float_min; /* earliest point in string it can appear */
- I32 offset_float_max; /* latest point in string it can appear */
- I32 *minlen_float; /* pointer to the minlen relevent to the string */
- I32 lookbehind_float; /* is the position of the string modified by LB */
- I32 flags;
- I32 whilem_c;
- I32 *last_closep;
- struct regnode_charclass_class *start_class;
-} scan_data_t;
-
-/*
- * Forward declarations for pregcomp()'s friends.
- */
-
-static const scan_data_t zero_scan_data =
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0};
-
-#define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL)
-#define SF_BEFORE_SEOL 0x0001
-#define SF_BEFORE_MEOL 0x0002
-#define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL)
-#define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL)
-
-#ifdef NO_UNARY_PLUS
-# define SF_FIX_SHIFT_EOL (0+2)
-# define SF_FL_SHIFT_EOL (0+4)
-#else
-# define SF_FIX_SHIFT_EOL (+2)
-# define SF_FL_SHIFT_EOL (+4)
-#endif
-
-#define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL)
-#define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL)
-
-#define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL)
-#define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */
-#define SF_IS_INF 0x0040
-#define SF_HAS_PAR 0x0080
-#define SF_IN_PAR 0x0100
-#define SF_HAS_EVAL 0x0200
-#define SCF_DO_SUBSTR 0x0400
-#define SCF_DO_STCLASS_AND 0x0800
-#define SCF_DO_STCLASS_OR 0x1000
-#define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR)
-#define SCF_WHILEM_VISITED_POS 0x2000
-
-#define SCF_TRIE_RESTUDY 0x4000 /* Do restudy? */
-#define SCF_SEEN_ACCEPT 0x8000
-
-#define UTF (RExC_utf8 != 0)
-#define LOC ((RExC_flags & RXf_PMf_LOCALE) != 0)
-#define FOLD ((RExC_flags & RXf_PMf_FOLD) != 0)
-
-#define OOB_UNICODE 12345678
-#define OOB_NAMEDCLASS -1
-
-#define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b)
-
-
-/* length of regex to show in messages that don't mark a position within */
-#define RegexLengthToShowInErrorMessages 127
-
-/*
- * If MARKER[12] are adjusted, be sure to adjust the constants at the top
- * of t/op/regmesg.t, the tests in t/op/re_tests, and those in
- * op/pragma/warn/regcomp.
- */
-#define MARKER1 "<-- HERE" /* marker as it appears in the description */
-#define MARKER2 " <-- HERE " /* marker as it appears within the regex */
-
-#define REPORT_LOCATION " in regex; marked by " MARKER1 " in m/%.*s" MARKER2 "%s/"
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given
- * arg. Show regex, up to a maximum length. If it's too long, chop and add
- * "...".
- */
-#define _FAIL(code) STMT_START { \
- const char *ellipses = ""; \
- IV len = RExC_end - RExC_precomp; \
- \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- if (len > RegexLengthToShowInErrorMessages) { \
- /* chop 10 shorter than the max, to ensure meaning of "..." */ \
- len = RegexLengthToShowInErrorMessages - 10; \
- ellipses = "..."; \
- } \
- code; \
-} STMT_END
-
-#define FAIL(msg) _FAIL( \
- Perl_croak(aTHX_ "%s in regex m/%.*s%s/", \
- msg, (int)len, RExC_precomp, ellipses))
-
-#define FAIL2(msg,arg) _FAIL( \
- Perl_croak(aTHX_ msg " in regex m/%.*s%s/", \
- arg, (int)len, RExC_precomp, ellipses))
-
-/*
- * Simple_vFAIL -- like FAIL, but marks the current location in the scan
- */
-#define Simple_vFAIL(m) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- Perl_croak(aTHX_ "%s" REPORT_LOCATION, \
- m, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL()
- */
-#define vFAIL(m) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL(m); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts two arguments.
- */
-#define Simple_vFAIL2(m,a1) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2().
- */
-#define vFAIL2(m,a1) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL2(m, a1); \
-} STMT_END
-
-
-/*
- * Like Simple_vFAIL(), but accepts three arguments.
- */
-#define Simple_vFAIL3(m, a1, a2) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3().
- */
-#define vFAIL3(m,a1,a2) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL3(m, a1, a2); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts four arguments.
- */
-#define Simple_vFAIL4(m, a1, a2, a3) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNreg(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNregdep(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_REGEXP), \
- m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN2reg(loc, m, a1) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN3(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN3reg(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN4(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN4reg(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN5(loc, m, a1, a2, a3, a4) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, a4, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-
-/* Allow for side effects in s */
-#define REGC(c,s) STMT_START { \
- if (!SIZE_ONLY) *(s) = (c); else (void)(s); \
-} STMT_END
-
-/* Macros for recording node offsets. 20001227 mjd@plover.com
- * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in
- * element 2*n-1 of the array. Element #2n holds the byte length node #n.
- * Element 0 holds the number n.
- * Position is 1 indexed.
- */
-#ifndef RE_TRACK_PATTERN_OFFSETS
-#define Set_Node_Offset_To_R(node,byte)
-#define Set_Node_Offset(node,byte)
-#define Set_Cur_Node_Offset
-#define Set_Node_Length_To_R(node,len)
-#define Set_Node_Length(node,len)
-#define Set_Node_Cur_Length(node)
-#define Node_Offset(n)
-#define Node_Length(n)
-#define Set_Node_Offset_Length(node,offset,len)
-#define ProgLen(ri) ri->u.proglen
-#define SetProgLen(ri,x) ri->u.proglen = x
-#else
-#define ProgLen(ri) ri->u.offsets[0]
-#define SetProgLen(ri,x) ri->u.offsets[0] = x
-#define Set_Node_Offset_To_R(node,byte) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) offset of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(byte))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Offset macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)-1] = (byte); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Offset(node,byte) \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start)
-#define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse)
-
-#define Set_Node_Length_To_R(node,len) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) size of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(len))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Length macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)] = (len); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Length(node,len) \
- Set_Node_Length_To_R((node)-RExC_emit_start, len)
-#define Set_Cur_Node_Length(len) Set_Node_Length(RExC_emit, len)
-#define Set_Node_Cur_Length(node) \
- Set_Node_Length(node, RExC_parse - parse_start)
-
-/* Get offsets and lengths */
-#define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1])
-#define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)])
-
-#define Set_Node_Offset_Length(node,offset,len) STMT_START { \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (offset)); \
- Set_Node_Length_To_R((node)-RExC_emit_start, (len)); \
-} STMT_END
-#endif
-
-#if PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS
-#define EXPERIMENTAL_INPLACESCAN
-#endif /*RE_TRACK_PATTERN_OFFSETS*/
-
-#define DEBUG_STUDYDATA(str,data,depth) \
-DEBUG_OPTIMISE_MORE_r(if(data){ \
- PerlIO_printf(Perl_debug_log, \
- "%*s" str "Pos:%"IVdf"/%"IVdf \
- " Flags: 0x%"UVXf" Whilem_c: %"IVdf" Lcp: %"IVdf" %s", \
- (int)(depth)*2, "", \
- (IV)((data)->pos_min), \
- (IV)((data)->pos_delta), \
- (UV)((data)->flags), \
- (IV)((data)->whilem_c), \
- (IV)((data)->last_closep ? *((data)->last_closep) : -1), \
- is_inf ? "INF " : "" \
- ); \
- if ((data)->last_found) \
- PerlIO_printf(Perl_debug_log, \
- "Last:'%s' %"IVdf":%"IVdf"/%"IVdf" %sFixed:'%s' @ %"IVdf \
- " %sFloat: '%s' @ %"IVdf"/%"IVdf"", \
- SvPVX_const((data)->last_found), \
- (IV)((data)->last_end), \
- (IV)((data)->last_start_min), \
- (IV)((data)->last_start_max), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_fixed)) ? "*" : "", \
- SvPVX_const((data)->longest_fixed), \
- (IV)((data)->offset_fixed), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_float)) ? "*" : "", \
- SvPVX_const((data)->longest_float), \
- (IV)((data)->offset_float_min), \
- (IV)((data)->offset_float_max) \
- ); \
- PerlIO_printf(Perl_debug_log,"\n"); \
-});
-
-static void clear_re(pTHX_ void *r);
-
-/* Mark that we cannot extend a found fixed substring at this point.
- Update the longest found anchored substring and the longest found
- floating substrings if needed. */
-
-STATIC void
-S_scan_commit(pTHX_ const RExC_state_t *pRExC_state, scan_data_t *data, I32 *minlenp, int is_inf)
-{
- const STRLEN l = CHR_SVLEN(data->last_found);
- const STRLEN old_l = CHR_SVLEN(*data->longest);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_SCAN_COMMIT;
-
- if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) {
- SvSetMagicSV(*data->longest, data->last_found);
- if (*data->longest == data->longest_fixed) {
- data->offset_fixed = l ? data->last_start_min : data->pos_min;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL);
- else
- data->flags &= ~SF_FIX_BEFORE_EOL;
- data->minlen_fixed=minlenp;
- data->lookbehind_fixed=0;
- }
- else { /* *data->longest == data->longest_float */
- data->offset_float_min = l ? data->last_start_min : data->pos_min;
- data->offset_float_max = (l
- ? data->last_start_max
- : data->pos_min + data->pos_delta);
- if (is_inf || (U32)data->offset_float_max > (U32)I32_MAX)
- data->offset_float_max = I32_MAX;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL);
- else
- data->flags &= ~SF_FL_BEFORE_EOL;
- data->minlen_float=minlenp;
- data->lookbehind_float=0;
- }
- }
- SvCUR_set(data->last_found, 0);
- {
- SV * const sv = data->last_found;
- if (SvUTF8(sv) && SvMAGICAL(sv)) {
- MAGIC * const mg = mg_find(sv, PERL_MAGIC_utf8);
- if (mg)
- mg->mg_len = 0;
- }
- }
- data->last_end = -1;
- data->flags &= ~SF_BEFORE_EOL;
- DEBUG_STUDYDATA("commit: ",data,0);
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_anything(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_ANYTHING;
-
- ANYOF_CLASS_ZERO(cl);
- ANYOF_BITMAP_SETALL(cl);
- cl->flags = ANYOF_EOS|ANYOF_UNICODE_ALL;
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* Can match anything (initialization) */
-STATIC int
-S_cl_is_anything(const struct regnode_charclass_class *cl)
-{
- int value;
-
- PERL_ARGS_ASSERT_CL_IS_ANYTHING;
-
- for (value = 0; value <= ANYOF_MAX; value += 2)
- if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1))
- return 1;
- if (!(cl->flags & ANYOF_UNICODE_ALL))
- return 0;
- if (!ANYOF_BITMAP_TESTALLSET((const void*)cl))
- return 0;
- return 1;
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_init(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
-}
-
-STATIC void
-S_cl_init_zero(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT_ZERO;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* 'And' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_and(struct regnode_charclass_class *cl,
- const struct regnode_charclass_class *and_with)
-{
- PERL_ARGS_ASSERT_CL_AND;
-
- assert(and_with->type == ANYOF);
- if (!(and_with->flags & ANYOF_CLASS)
- && !(cl->flags & ANYOF_CLASS)
- && (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(and_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD)) {
- int i;
-
- if (and_with->flags & ANYOF_INVERT)
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= ~and_with->bitmap[i];
- else
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= and_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise, leave it along for a moment. */
- if (!(and_with->flags & ANYOF_EOS))
- cl->flags &= ~ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE_ALL && and_with->flags & ANYOF_UNICODE &&
- !(and_with->flags & ANYOF_INVERT)) {
- cl->flags &= ~ANYOF_UNICODE_ALL;
- cl->flags |= ANYOF_UNICODE;
- ARG_SET(cl, ARG(and_with));
- }
- if (!(and_with->flags & ANYOF_UNICODE_ALL) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE_ALL;
- if (!(and_with->flags & (ANYOF_UNICODE|ANYOF_UNICODE_ALL)) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE;
-}
-
-/* 'OR' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_or(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl, const struct regnode_charclass_class *or_with)
-{
- PERL_ARGS_ASSERT_CL_OR;
-
- if (or_with->flags & ANYOF_INVERT) {
- /* We do not use
- * (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2))
- * <= (B1 | !B2) | (CL1 | !CL2)
- * which is wasteful if CL2 is small, but we ignore CL2:
- * (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1
- * XXXX Can we handle case-fold? Unclear:
- * (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) =
- * (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i'))
- */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(or_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD) ) {
- int i;
-
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= ~or_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise */
- else {
- cl_anything(pRExC_state, cl);
- }
- } else {
- /* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && (!(or_with->flags & ANYOF_FOLD)
- || (cl->flags & ANYOF_FOLD)) ) {
- int i;
-
- /* OR char bitmap and class bitmap separately */
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= or_with->bitmap[i];
- if (or_with->flags & ANYOF_CLASS) {
- for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++)
- cl->classflags[i] |= or_with->classflags[i];
- cl->flags |= ANYOF_CLASS;
- }
- }
- else { /* XXXX: logic is complicated, leave it along for a moment. */
- cl_anything(pRExC_state, cl);
- }
- }
- if (or_with->flags & ANYOF_EOS)
- cl->flags |= ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE && or_with->flags & ANYOF_UNICODE &&
- ARG(cl) != ARG(or_with)) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
- if (or_with->flags & ANYOF_UNICODE_ALL) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
-}
-
-#define TRIE_LIST_ITEM(state,idx) (trie->states[state].trans.list)[ idx ]
-#define TRIE_LIST_CUR(state) ( TRIE_LIST_ITEM( state, 0 ).forid )
-#define TRIE_LIST_LEN(state) ( TRIE_LIST_ITEM( state, 0 ).newstate )
-#define TRIE_LIST_USED(idx) ( trie->states[state].trans.list ? (TRIE_LIST_CUR( idx ) - 1) : 0 )
-
-
-#ifdef DEBUGGING
-/*
- dump_trie(trie,widecharmap,revcharmap)
- dump_trie_interim_list(trie,widecharmap,revcharmap,next_alloc)
- dump_trie_interim_table(trie,widecharmap,revcharmap,next_alloc)
-
- These routines dump out a trie in a somewhat readable format.
- The _interim_ variants are used for debugging the interim
- tables that are used to generate the final compressed
- representation which is what dump_trie expects.
-
- Part of the reason for their existance is to provide a form
- of documentation as to how the different representations function.
-
-*/
-
-/*
- Dumps the final compressed table form of the trie to Perl_debug_log.
- Used for debugging make_trie().
-*/
-
-STATIC void
-S_dump_trie(pTHX_ const struct _reg_trie_data *trie, HV *widecharmap,
- AV *revcharmap, U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE;
-
- PerlIO_printf( Perl_debug_log, "%*sChar : %-6s%-6s%-4s ",
- (int)depth * 2 + 2,"",
- "Match","Base","Ofs" );
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ ) {
- SV ** const tmp = av_fetch( revcharmap, state, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
- PerlIO_printf( Perl_debug_log, "\n%*sState|-----------------------",
- (int)depth * 2 + 2,"");
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ )
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth, "--------");
- PerlIO_printf( Perl_debug_log, "\n");
-
- for( state = 1 ; state < trie->statecount ; state++ ) {
- const U32 base = trie->states[ state ].trans.base;
-
- PerlIO_printf( Perl_debug_log, "%*s#%4"UVXf"|", (int)depth * 2 + 2,"", (UV)state);
-
- if ( trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " W%4X", trie->states[ state ].wordnum );
- } else {
- PerlIO_printf( Perl_debug_log, "%6s", "" );
- }
-
- PerlIO_printf( Perl_debug_log, " @%4"UVXf" ", (UV)base );
-
- if ( base ) {
- U32 ofs = 0;
-
- while( ( base + ofs < trie->uniquecharcount ) ||
- ( base + ofs - trie->uniquecharcount < trie->lasttrans
- && trie->trans[ base + ofs - trie->uniquecharcount ].check != state))
- ofs++;
-
- PerlIO_printf( Perl_debug_log, "+%2"UVXf"[ ", (UV)ofs);
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- PerlIO_printf( Perl_debug_log, "%*"UVXf,
- colwidth,
- (UV)trie->trans[ base + ofs - trie->uniquecharcount ].next );
- } else {
- PerlIO_printf( Perl_debug_log, "%*s",colwidth," ." );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "]");
-
- }
- PerlIO_printf( Perl_debug_log, "\n" );
- }
-}
-/*
- Dumps a fully constructed but uncompressed trie in list form.
- List tries normally only are used for construction when the number of
- possible chars (trie->uniquecharcount) is very high.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_list(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_LIST;
-
- /* print out the table precompression. */
- PerlIO_printf( Perl_debug_log, "%*sState :Word | Transition Data\n%*s%s",
- (int)depth * 2 + 2,"", (int)depth * 2 + 2,"",
- "------:-----+-----------------\n" );
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U16 charid;
-
- PerlIO_printf( Perl_debug_log, "%*s %4"UVXf" :",
- (int)depth * 2 + 2,"", (UV)state );
- if ( ! trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, "%5s| ","");
- } else {
- PerlIO_printf( Perl_debug_log, "W%4x| ",
- trie->states[ state ].wordnum
- );
- }
- for( charid = 1 ; charid <= TRIE_LIST_USED( state ) ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, TRIE_LIST_ITEM(state,charid).forid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s:%3X=%4"UVXf" | ",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- ) ,
- TRIE_LIST_ITEM(state,charid).forid,
- (UV)TRIE_LIST_ITEM(state,charid).newstate
- );
- if (!(charid % 10))
- PerlIO_printf(Perl_debug_log, "\n%*s| ",
- (int)((depth * 2) + 14), "");
- }
- }
- PerlIO_printf( Perl_debug_log, "\n");
- }
-}
-
-/*
- Dumps a fully constructed but uncompressed trie in table form.
- This is the normal DFA style state transition table, with a few
- twists to facilitate compression later.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_table(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- U16 charid;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_TABLE;
-
- /*
- print out the table precompression so that we can do a visual check
- that they are identical.
- */
-
- PerlIO_printf( Perl_debug_log, "%*sChar : ",(int)depth * 2 + 2,"" );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, charid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "\n%*sState+-",(int)depth * 2 + 2,"" );
-
- for( charid=0 ; charid < trie->uniquecharcount ; charid++ ) {
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth,"--------");
- }
-
- PerlIO_printf( Perl_debug_log, "\n" );
-
- for( state=1 ; state < next_alloc ; state += trie->uniquecharcount ) {
-
- PerlIO_printf( Perl_debug_log, "%*s%4"UVXf" : ",
- (int)depth * 2 + 2,"",
- (UV)TRIE_NODENUM( state ) );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- UV v=(UV)SAFE_TRIE_NODENUM( trie->trans[ state + charid ].next );
- if (v)
- PerlIO_printf( Perl_debug_log, "%*"UVXf, colwidth, v );
- else
- PerlIO_printf( Perl_debug_log, "%*s", colwidth, "." );
- }
- if ( ! trie->states[ TRIE_NODENUM( state ) ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf")\n", (UV)trie->trans[ state ].check );
- } else {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf") W%4X\n", (UV)trie->trans[ state ].check,
- trie->states[ TRIE_NODENUM( state ) ].wordnum );
- }
- }
-}
-
-#endif
-
-/* make_trie(startbranch,first,last,tail,word_count,flags,depth)
- startbranch: the first branch in the whole branch sequence
- first : start branch of sequence of branch-exact nodes.
- May be the same as startbranch
- last : Thing following the last branch.
- May be the same as tail.
- tail : item following the branch sequence
- count : words in the sequence
- flags : currently the OP() type we will be building one of /EXACT(|F|Fl)/
- depth : indent depth
-
-Inplace optimizes a sequence of 2 or more Branch-Exact nodes into a TRIE node.
-
-A trie is an N'ary tree where the branches are determined by digital
-decomposition of the key. IE, at the root node you look up the 1st character and
-follow that branch repeat until you find the end of the branches. Nodes can be
-marked as "accepting" meaning they represent a complete word. Eg:
-
- /he|she|his|hers/
-
-would convert into the following structure. Numbers represent states, letters
-following numbers represent valid transitions on the letter from that state, if
-the number is in square brackets it represents an accepting state, otherwise it
-will be in parenthesis.
-
- +-h->+-e->[3]-+-r->(8)-+-s->[9]
- | |
- | (2)
- | |
- (1) +-i->(6)-+-s->[7]
- |
- +-s->(3)-+-h->(4)-+-e->[5]
-
- Accept Word Mapping: 3=>1 (he),5=>2 (she), 7=>3 (his), 9=>4 (hers)
-
-This shows that when matching against the string 'hers' we will begin at state 1
-read 'h' and move to state 2, read 'e' and move to state 3 which is accepting,
-then read 'r' and go to state 8 followed by 's' which takes us to state 9 which
-is also accepting. Thus we know that we can match both 'he' and 'hers' with a
-single traverse. We store a mapping from accepting to state to which word was
-matched, and then when we have multiple possibilities we try to complete the
-rest of the regex in the order in which they occured in the alternation.
-
-The only prior NFA like behaviour that would be changed by the TRIE support is
-the silent ignoring of duplicate alternations which are of the form:
-
- / (DUPE|DUPE) X? (?{ ... }) Y /x
-
-Thus EVAL blocks follwing a trie may be called a different number of times with
-and without the optimisation. With the optimisations dupes will be silently
-ignored. This inconsistant behaviour of EVAL type nodes is well established as
-the following demonstrates:
-
- 'words'=~/(word|word|word)(?{ print $1 })[xyz]/
-
-which prints out 'word' three times, but
-
- 'words'=~/(word|word|word)(?{ print $1 })S/
-
-which doesnt print it out at all. This is due to other optimisations kicking in.
-
-Example of what happens on a structural level:
-
-The regexp /(ac|ad|ab)+/ will produce the folowing debug output:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: BRANCH(8)
- 6: EXACT <ac>(16)
- 8: BRANCH(11)
- 9: EXACT <ad>(16)
- 11: BRANCH(14)
- 12: EXACT <ab>(16)
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-This would be optimizable with startbranch=5, first=5, last=16, tail=16
-and should turn into:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: TRIE(16)
- [Words:3 Chars Stored:6 Unique Chars:4 States:5 NCP:1]
- <ac>
- <ad>
- <ab>
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-Cases where tail != last would be like /(?foo|bar)baz/:
-
- 1: BRANCH(4)
- 2: EXACT <foo>(8)
- 4: BRANCH(7)
- 5: EXACT <bar>(8)
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
-which would be optimizable with startbranch=1, first=1, last=7, tail=8
-and would end up looking like:
-
- 1: TRIE(8)
- [Words:2 Chars Stored:6 Unique Chars:5 States:7 NCP:1]
- <foo>
- <bar>
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
- d = uvuni_to_utf8_flags(d, uv, 0);
-
-is the recommended Unicode-aware way of saying
-
- *(d++) = uv;
-*/
-
-#define TRIE_STORE_REVCHAR \
- STMT_START { \
- if (UTF) { \
- SV *zlopp = newSV(2); \
- unsigned char *flrbbbbb = (unsigned char *) SvPVX(zlopp); \
- unsigned const char *const kapow = uvuni_to_utf8(flrbbbbb, uvc & 0xFF); \
- SvCUR_set(zlopp, kapow - flrbbbbb); \
- SvPOK_on(zlopp); \
- SvUTF8_on(zlopp); \
- av_push(revcharmap, zlopp); \
- } else { \
- char ooooff = (char)uvc; \
- av_push(revcharmap, newSVpvn(&ooooff, 1)); \
- } \
- } STMT_END
-
-#define TRIE_READ_CHAR STMT_START { \
- wordlen++; \
- if ( UTF ) { \
- if ( folder ) { \
- if ( foldlen > 0 ) { \
- uvc = utf8n_to_uvuni( scan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- scan += len; \
- len = 0; \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- scan = foldbuf + UNISKIP( uvc ); \
- } \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- } \
- } else { \
- uvc = (U32)*uc; \
- len = 1; \
- } \
-} STMT_END
-
-
-
-#define TRIE_LIST_PUSH(state,fid,ns) STMT_START { \
- if ( TRIE_LIST_CUR( state ) >=TRIE_LIST_LEN( state ) ) { \
- U32 ging = TRIE_LIST_LEN( state ) *= 2; \
- Renew( trie->states[ state ].trans.list, ging, reg_trie_trans_le ); \
- } \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).forid = fid; \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).newstate = ns; \
- TRIE_LIST_CUR( state )++; \
-} STMT_END
-
-#define TRIE_LIST_NEW(state) STMT_START { \
- Newxz( trie->states[ state ].trans.list, \
- 4, reg_trie_trans_le ); \
- TRIE_LIST_CUR( state ) = 1; \
- TRIE_LIST_LEN( state ) = 4; \
-} STMT_END
-
-#define TRIE_HANDLE_WORD(state) STMT_START { \
- U16 dupe= trie->states[ state ].wordnum; \
- regnode * const noper_next = regnext( noper ); \
- \
- if (trie->wordlen) \
- trie->wordlen[ curword ] = wordlen; \
- DEBUG_r({ \
- /* store the word for dumping */ \
- SV* tmp; \
- if (OP(noper) != NOTHING) \
- tmp = newSVpvn_utf8(STRING(noper), STR_LEN(noper), UTF); \
- else \
- tmp = newSVpvn_utf8( "", 0, UTF ); \
- av_push( trie_words, tmp ); \
- }); \
- \
- curword++; \
- \
- if ( noper_next < tail ) { \
- if (!trie->jump) \
- trie->jump = (U16 *) PerlMemShared_calloc( word_count + 1, sizeof(U16) ); \
- trie->jump[curword] = (U16)(noper_next - convert); \
- if (!jumper) \
- jumper = noper_next; \
- if (!nextbranch) \
- nextbranch= regnext(cur); \
- } \
- \
- if ( dupe ) { \
- /* So it's a dupe. This means we need to maintain a */\
- /* linked-list from the first to the next. */\
- /* we only allocate the nextword buffer when there */\
- /* a dupe, so first time we have to do the allocation */\
- if (!trie->nextword) \
- trie->nextword = (U16 *) \
- PerlMemShared_calloc( word_count + 1, sizeof(U16)); \
- while ( trie->nextword[dupe] ) \
- dupe= trie->nextword[dupe]; \
- trie->nextword[dupe]= curword; \
- } else { \
- /* we haven't inserted this word yet. */ \
- trie->states[ state ].wordnum = curword; \
- } \
-} STMT_END
-
-
-#define TRIE_TRANS_STATE(state,base,ucharcount,charid,special) \
- ( ( base + charid >= ucharcount \
- && base + charid < ubound \
- && state == trie->trans[ base - ucharcount + charid ].check \
- && trie->trans[ base - ucharcount + charid ].next ) \
- ? trie->trans[ base - ucharcount + charid ].next \
- : ( state==1 ? special : 0 ) \
- )
-
-#define MADE_TRIE 1
-#define MADE_JUMP_TRIE 2
-#define MADE_EXACT_TRIE 4
-
-STATIC I32
-S_make_trie(pTHX_ RExC_state_t *pRExC_state, regnode *startbranch, regnode *first, regnode *last, regnode *tail, U32 word_count, U32 flags, U32 depth)
-{
- dVAR;
- /* first pass, loop through and scan words */
- reg_trie_data *trie;
- HV *widecharmap = NULL;
- AV *revcharmap = newAV();
- regnode *cur;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- STRLEN len = 0;
- UV uvc = 0;
- U16 curword = 0;
- U32 next_alloc = 0;
- regnode *jumper = NULL;
- regnode *nextbranch = NULL;
- regnode *convert = NULL;
- /* we just use folder as a flag in utf8 */
- const U8 * const folder = ( flags == EXACTF
- ? PL_fold
- : ( flags == EXACTFL
- ? PL_fold_locale
- : NULL
- )
- );
-
-#ifdef DEBUGGING
- const U32 data_slot = add_data( pRExC_state, 4, "tuuu" );
- AV *trie_words = NULL;
- /* along with revcharmap, this only used during construction but both are
- * useful during debugging so we store them in the struct when debugging.
- */
-#else
- const U32 data_slot = add_data( pRExC_state, 2, "tu" );
- STRLEN trie_charcount=0;
-#endif
- SV *re_trie_maxbuff;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- trie = (reg_trie_data *) PerlMemShared_calloc( 1, sizeof(reg_trie_data) );
- trie->refcount = 1;
- trie->startstate = 1;
- trie->wordcount = word_count;
- RExC_rxi->data->data[ data_slot ] = (void*)trie;
- trie->charmap = (U16 *) PerlMemShared_calloc( 256, sizeof(U16) );
- if (!(UTF && folder))
- trie->bitmap = (char *) PerlMemShared_calloc( ANYOF_BITMAP_SIZE, 1 );
- DEBUG_r({
- trie_words = newAV();
- });
-
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff)) {
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- DEBUG_OPTIMISE_r({
- PerlIO_printf( Perl_debug_log,
- "%*smake_trie start==%d, first==%d, last==%d, tail==%d depth=%d\n",
- (int)depth * 2 + 2, "",
- REG_NODE_NUM(startbranch),REG_NODE_NUM(first),
- REG_NODE_NUM(last), REG_NODE_NUM(tail),
- (int)depth);
- });
-
- /* Find the node we are going to overwrite */
- if ( first == startbranch && OP( last ) != BRANCH ) {
- /* whole branch chain */
- convert = first;
- } else {
- /* branch sub-chain */
- convert = NEXTOPER( first );
- }
-
- /* -- First loop and Setup --
-
- We first traverse the branches and scan each word to determine if it
- contains widechars, and how many unique chars there are, this is
- important as we have to build a table with at least as many columns as we
- have unique chars.
-
- We use an array of integers to represent the character codes 0..255
- (trie->charmap) and we use a an HV* to store Unicode characters. We use the
- native representation of the character value as the key and IV's for the
- coded index.
-
- *TODO* If we keep track of how many times each character is used we can
- remap the columns so that the table compression later on is more
- efficient in terms of memory by ensuring most common value is in the
- middle and the least common are on the outside. IMO this would be better
- than a most to least common mapping as theres a decent chance the most
- common letter will share a node with the least common, meaning the node
- will not be compressable. With a middle is most common approach the worst
- case is when we have the least common nodes twice.
-
- */
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- STRLEN foldlen = 0;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- const U8 *scan = (U8*)NULL;
- U32 wordlen = 0; /* required init */
- STRLEN chars = 0;
- bool set_bit = trie->bitmap ? 1 : 0; /*store the first char in the bitmap?*/
-
- if (OP(noper) == NOTHING) {
- trie->minlen= 0;
- continue;
- }
- if ( set_bit ) /* bitmap only alloced when !(UTF&&Folding) */
- TRIE_BITMAP_SET(trie,*uc); /* store the raw first byte
- regardless of encoding */
-
- for ( ; uc < e ; uc += len ) {
- TRIE_CHARCOUNT(trie)++;
- TRIE_READ_CHAR;
- chars++;
- if ( uvc < 256 ) {
- if ( !trie->charmap[ uvc ] ) {
- trie->charmap[ uvc ]=( ++trie->uniquecharcount );
- if ( folder )
- trie->charmap[ folder[ uvc ] ] = trie->charmap[ uvc ];
- TRIE_STORE_REVCHAR;
- }
- if ( set_bit ) {
- /* store the codepoint in the bitmap, and if its ascii
- also store its folded equivelent. */
- TRIE_BITMAP_SET(trie,uvc);
-
- /* store the folded codepoint */
- if ( folder ) TRIE_BITMAP_SET(trie,folder[ uvc ]);
-
- if ( !UTF ) {
- /* store first byte of utf8 representation of
- codepoints in the 127 < uvc < 256 range */
- if (127 < uvc && uvc < 192) {
- TRIE_BITMAP_SET(trie,194);
- } else if (191 < uvc ) {
- TRIE_BITMAP_SET(trie,195);
- /* && uvc < 256 -- we know uvc is < 256 already */
- }
- }
- set_bit = 0; /* We've done our bit :-) */
- }
- } else {
- SV** svpp;
- if ( !widecharmap )
- widecharmap = newHV();
-
- svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 1 );
-
- if ( !svpp )
- Perl_croak( aTHX_ "error creating/fetching widecharmap entry for 0x%"UVXf, uvc );
-
- if ( !SvTRUE( *svpp ) ) {
- sv_setiv( *svpp, ++trie->uniquecharcount );
- TRIE_STORE_REVCHAR;
- }
- }
- }
- if( cur == first ) {
- trie->minlen=chars;
- trie->maxlen=chars;
- } else if (chars < trie->minlen) {
- trie->minlen=chars;
- } else if (chars > trie->maxlen) {
- trie->maxlen=chars;
- }
-
- } /* end first pass */
- DEBUG_TRIE_COMPILE_r(
- PerlIO_printf( Perl_debug_log, "%*sTRIE(%s): W:%d C:%d Uq:%d Min:%d Max:%d\n",
- (int)depth * 2 + 2,"",
- ( widecharmap ? "UTF8" : "NATIVE" ), (int)word_count,
- (int)TRIE_CHARCOUNT(trie), trie->uniquecharcount,
- (int)trie->minlen, (int)trie->maxlen )
- );
- trie->wordlen = (U32 *) PerlMemShared_calloc( word_count, sizeof(U32) );
-
- /*
- We now know what we are dealing with in terms of unique chars and
- string sizes so we can calculate how much memory a naive
- representation using a flat table will take. If it's over a reasonable
- limit (as specified by ${^RE_TRIE_MAXBUF}) we use a more memory
- conservative but potentially much slower representation using an array
- of lists.
-
- At the end we convert both representations into the same compressed
- form that will be used in regexec.c for matching with. The latter
- is a form that cannot be used to construct with but has memory
- properties similar to the list form and access properties similar
- to the table form making it both suitable for fast searches and
- small enough that its feasable to store for the duration of a program.
-
- See the comment in the code where the compressed table is produced
- inplace from the flat tabe representation for an explanation of how
- the compression works.
-
- */
-
-
- if ( (IV)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1) > SvIV(re_trie_maxbuff) ) {
- /*
- Second Pass -- Array Of Lists Representation
-
- Each state will be represented by a list of charid:state records
- (reg_trie_trans_le) the first such element holds the CUR and LEN
- points of the allocated array. (See defines above).
-
- We build the initial structure using the lists, and then convert
- it into the compressed table form which allows faster lookups
- (but cant be modified once converted).
- */
-
- STRLEN transcount = 1;
-
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using list compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- TRIE_LIST_NEW(1);
- next_alloc = 2;
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- U32 state = 1; /* required init */
- U16 charid = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if (OP(noper) != NOTHING) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV** const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- if ( !svpp ) {
- charid = 0;
- } else {
- charid=(U16)SvIV( *svpp );
- }
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- if ( charid ) {
-
- U16 check;
- U32 newstate = 0;
-
- charid--;
- if ( !trie->states[ state ].trans.list ) {
- TRIE_LIST_NEW( state );
- }
- for ( check = 1; check <= TRIE_LIST_USED( state ); check++ ) {
- if ( TRIE_LIST_ITEM( state, check ).forid == charid ) {
- newstate = TRIE_LIST_ITEM( state, check ).newstate;
- break;
- }
- }
- if ( ! newstate ) {
- newstate = next_alloc++;
- TRIE_LIST_PUSH( state, charid, newstate );
- transcount++;
- }
- state = newstate;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- }
- }
- TRIE_HANDLE_WORD(state);
-
- } /* end second pass */
-
- /* next alloc is the NEXT state to be allocated */
- trie->statecount = next_alloc;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states,
- next_alloc
- * sizeof(reg_trie_state) );
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_list(trie, widecharmap,
- revcharmap, next_alloc,
- depth+1)
- );
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( transcount, sizeof(reg_trie_trans) );
- {
- U32 state;
- U32 tp = 0;
- U32 zp = 0;
-
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U32 base=0;
-
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, "tp: %d zp: %d ",tp,zp)
- );
- */
-
- if (trie->states[state].trans.list) {
- U16 minid=TRIE_LIST_ITEM( state, 1).forid;
- U16 maxid=minid;
- U16 idx;
-
- for( idx = 2 ; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U16 forid = TRIE_LIST_ITEM( state, idx).forid;
- if ( forid < minid ) {
- minid=forid;
- } else if ( forid > maxid ) {
- maxid=forid;
- }
- }
- if ( transcount < tp + maxid - minid + 1) {
- transcount *= 2;
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans,
- transcount
- * sizeof(reg_trie_trans) );
- Zero( trie->trans + (transcount / 2), transcount / 2 , reg_trie_trans );
- }
- base = trie->uniquecharcount + tp - minid;
- if ( maxid == minid ) {
- U32 set = 0;
- for ( ; zp < tp ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- base = trie->uniquecharcount + zp - minid;
- trie->trans[ zp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ zp ].check = state;
- set = 1;
- break;
- }
- }
- if ( !set ) {
- trie->trans[ tp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ tp ].check = state;
- tp++;
- zp = tp;
- }
- } else {
- for ( idx=1; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U32 tid = base - trie->uniquecharcount + TRIE_LIST_ITEM( state, idx ).forid;
- trie->trans[ tid ].next = TRIE_LIST_ITEM( state, idx ).newstate;
- trie->trans[ tid ].check = state;
- }
- tp += ( maxid - minid + 1 );
- }
- Safefree(trie->states[ state ].trans.list);
- }
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, " base: %d\n",base);
- );
- */
- trie->states[ state ].trans.base=base;
- }
- trie->lasttrans = tp + 1;
- }
- } else {
- /*
- Second Pass -- Flat Table Representation.
-
- we dont use the 0 slot of either trans[] or states[] so we add 1 to each.
- We know that we will need Charcount+1 trans at most to store the data
- (one row per char at worst case) So we preallocate both structures
- assuming worst case.
-
- We then construct the trie using only the .next slots of the entry
- structs.
-
- We use the .check field of the first entry of the node temporarily to
- make compression both faster and easier by keeping track of how many non
- zero fields are in the node.
-
- Since trans are numbered from 1 any 0 pointer in the table is a FAIL
- transition.
-
- There are two terms at use here: state as a TRIE_NODEIDX() which is a
- number representing the first entry of the node, and state as a
- TRIE_NODENUM() which is the trans number. state 1 is TRIE_NODEIDX(1) and
- TRIE_NODENUM(1), state 2 is TRIE_NODEIDX(2) and TRIE_NODENUM(3) if there
- are 2 entrys per node. eg:
-
- A B A B
- 1. 2 4 1. 3 7
- 2. 0 3 3. 0 5
- 3. 0 0 5. 0 0
- 4. 0 0 7. 0 0
-
- The table is internally in the right hand, idx form. However as we also
- have to deal with the states array which is indexed by nodenum we have to
- use TRIE_NODENUM() to convert.
-
- */
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using table compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( ( TRIE_CHARCOUNT(trie) + 1 )
- * trie->uniquecharcount + 1,
- sizeof(reg_trie_trans) );
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- next_alloc = trie->uniquecharcount + 1;
-
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
-
- U32 state = 1; /* required init */
-
- U16 charid = 0; /* sanity init */
- U32 accept_state = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
-
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if ( OP(noper) != NOTHING ) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV* const * const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- charid = svpp ? (U16)SvIV(*svpp) : 0;
- }
- if ( charid ) {
- charid--;
- if ( !trie->trans[ state + charid ].next ) {
- trie->trans[ state + charid ].next = next_alloc;
- trie->trans[ state ].check++;
- next_alloc += trie->uniquecharcount;
- }
- state = trie->trans[ state + charid ].next;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- }
- }
- accept_state = TRIE_NODENUM( state );
- TRIE_HANDLE_WORD(accept_state);
-
- } /* end second pass */
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_table(trie, widecharmap,
- revcharmap,
- next_alloc, depth+1));
-
- {
- /*
- * Inplace compress the table.*
-
- For sparse data sets the table constructed by the trie algorithm will
- be mostly 0/FAIL transitions or to put it another way mostly empty.
- (Note that leaf nodes will not contain any transitions.)
-
- This algorithm compresses the tables by eliminating most such
- transitions, at the cost of a modest bit of extra work during lookup:
-
- - Each states[] entry contains a .base field which indicates the
- index in the state[] array wheres its transition data is stored.
-
- - If .base is 0 there are no valid transitions from that node.
-
- - If .base is nonzero then charid is added to it to find an entry in
- the trans array.
-
- -If trans[states[state].base+charid].check!=state then the
- transition is taken to be a 0/Fail transition. Thus if there are fail
- transitions at the front of the node then the .base offset will point
- somewhere inside the previous nodes data (or maybe even into a node
- even earlier), but the .check field determines if the transition is
- valid.
-
- XXX - wrong maybe?
- The following process inplace converts the table to the compressed
- table: We first do not compress the root node 1,and mark its all its
- .check pointers as 1 and set its .base pointer as 1 as well. This
- allows to do a DFA construction from the compressed table later, and
- ensures that any .base pointers we calculate later are greater than
- 0.
-
- - We set 'pos' to indicate the first entry of the second node.
-
- - We then iterate over the columns of the node, finding the first and
- last used entry at l and m. We then copy l..m into pos..(pos+m-l),
- and set the .check pointers accordingly, and advance pos
- appropriately and repreat for the next node. Note that when we copy
- the next pointers we have to convert them from the original
- NODEIDX form to NODENUM form as the former is not valid post
- compression.
-
- - If a node has no transitions used we mark its base as 0 and do not
- advance the pos pointer.
-
- - If a node only has one transition we use a second pointer into the
- structure to fill in allocated fail transitions from other states.
- This pointer is independent of the main pointer and scans forward
- looking for null transitions that are allocated to a state. When it
- finds one it writes the single transition into the "hole". If the
- pointer doesnt find one the single transition is appended as normal.
-
- - Once compressed we can Renew/realloc the structures to release the
- excess space.
-
- See "Table-Compression Methods" in sec 3.9 of the Red Dragon,
- specifically Fig 3.47 and the associated pseudocode.
-
- demq
- */
- const U32 laststate = TRIE_NODENUM( next_alloc );
- U32 state, charid;
- U32 pos = 0, zp=0;
- trie->statecount = laststate;
-
- for ( state = 1 ; state < laststate ; state++ ) {
- U8 flag = 0;
- const U32 stateidx = TRIE_NODEIDX( state );
- const U32 o_used = trie->trans[ stateidx ].check;
- U32 used = trie->trans[ stateidx ].check;
- trie->trans[ stateidx ].check = 0;
-
- for ( charid = 0 ; used && charid < trie->uniquecharcount ; charid++ ) {
- if ( flag || trie->trans[ stateidx + charid ].next ) {
- if ( trie->trans[ stateidx + charid ].next ) {
- if (o_used == 1) {
- for ( ; zp < pos ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- break;
- }
- }
- trie->states[ state ].trans.base = zp + trie->uniquecharcount - charid ;
- trie->trans[ zp ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ zp ].check = state;
- if ( ++zp > pos ) pos = zp;
- break;
- }
- used--;
- }
- if ( !flag ) {
- flag = 1;
- trie->states[ state ].trans.base = pos + trie->uniquecharcount - charid ;
- }
- trie->trans[ pos ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ pos ].check = state;
- pos++;
- }
- }
- }
- trie->lasttrans = pos + 1;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states, laststate
- * sizeof(reg_trie_state) );
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log,
- "%*sAlloc: %d Orig: %"IVdf" elements, Final:%"IVdf". Savings of %%%5.2f\n",
- (int)depth * 2 + 2,"",
- (int)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1 ),
- (IV)next_alloc,
- (IV)pos,
- ( ( next_alloc - pos ) * 100 ) / (double)next_alloc );
- );
-
- } /* end table compress */
- }
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf(Perl_debug_log, "%*sStatecount:%"UVxf" Lasttrans:%"UVxf"\n",
- (int)depth * 2 + 2, "",
- (UV)trie->statecount,
- (UV)trie->lasttrans)
- );
- /* resize the trans array to remove unused space */
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans, trie->lasttrans
- * sizeof(reg_trie_trans) );
-
- /* and now dump out the compressed format */
- DEBUG_TRIE_COMPILE_r(dump_trie(trie, widecharmap, revcharmap, depth+1));
-
- { /* Modify the program and insert the new TRIE node*/
- U8 nodetype =(U8)(flags & 0xFF);
- char *str=NULL;
-
-#ifdef DEBUGGING
- regnode *optimize = NULL;
-#ifdef RE_TRACK_PATTERN_OFFSETS
-
- U32 mjd_offset = 0;
- U32 mjd_nodelen = 0;
-#endif /* RE_TRACK_PATTERN_OFFSETS */
-#endif /* DEBUGGING */
- /*
- This means we convert either the first branch or the first Exact,
- depending on whether the thing following (in 'last') is a branch
- or not and whther first is the startbranch (ie is it a sub part of
- the alternation or is it the whole thing.)
- Assuming its a sub part we conver the EXACT otherwise we convert
- the whole branch sequence, including the first.
- */
- /* Find the node we are going to overwrite */
- if ( first != startbranch || OP( last ) == BRANCH ) {
- /* branch sub-chain */
- NEXT_OFF( first ) = (U16)(last - first);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_r({
- mjd_offset= Node_Offset((convert));
- mjd_nodelen= Node_Length((convert));
- });
-#endif
- /* whole branch chain */
- }
-#ifdef RE_TRACK_PATTERN_OFFSETS
- else {
- DEBUG_r({
- const regnode *nop = NEXTOPER( convert );
- mjd_offset= Node_Offset((nop));
- mjd_nodelen= Node_Length((nop));
- });
- }
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%*sMJD offset:%"UVuf" MJD length:%"UVuf"\n",
- (int)depth * 2 + 2, "",
- (UV)mjd_offset, (UV)mjd_nodelen)
- );
-#endif
- /* But first we check to see if there is a common prefix we can
- split out as an EXACT and put in front of the TRIE node. */
- trie->startstate= 1;
- if ( trie->bitmap && !widecharmap && !trie->jump ) {
- U32 state;
- for ( state = 1 ; state < trie->statecount-1 ; state++ ) {
- U32 ofs = 0;
- I32 idx = -1;
- U32 count = 0;
- const U32 base = trie->states[ state ].trans.base;
-
- if ( trie->states[state].wordnum )
- count = 1;
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- if ( ++count > 1 ) {
- SV **tmp = av_fetch( revcharmap, ofs, 0);
- const U8 *ch = (U8*)SvPV_nolen_const( *tmp );
- if ( state == 1 ) break;
- if ( count == 2 ) {
- Zero(trie->bitmap, ANYOF_BITMAP_SIZE, char);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*sNew Start State=%"UVuf" Class: [",
- (int)depth * 2 + 2, "",
- (UV)state));
- if (idx >= 0) {
- SV ** const tmp = av_fetch( revcharmap, idx, 0);
- const U8 * const ch = (U8*)SvPV_nolen_const( *tmp );
-
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie, folder[ *ch ]);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%s", (char*)ch)
- );
- }
- }
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie,folder[ *ch ]);
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"%s", ch));
- }
- idx = ofs;
- }
- }
- if ( count == 1 ) {
- SV **tmp = av_fetch( revcharmap, idx, 0);
- STRLEN len;
- char *ch = SvPV( *tmp, len );
- DEBUG_OPTIMISE_r({
- SV *sv=sv_newmortal();
- PerlIO_printf( Perl_debug_log,
- "%*sPrefix State: %"UVuf" Idx:%"UVuf" Char='%s'\n",
- (int)depth * 2 + 2, "",
- (UV)state, (UV)idx,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 6,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- });
- if ( state==1 ) {
- OP( convert ) = nodetype;
- str=STRING(convert);
- STR_LEN(convert)=0;
- }
- STR_LEN(convert) += len;
- while (len--)
- *str++ = *ch++;
- } else {
-#ifdef DEBUGGING
- if (state>1)
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"]\n"));
-#endif
- break;
- }
- }
- if (str) {
- regnode *n = convert+NODE_SZ_STR(convert);
- NEXT_OFF(convert) = NODE_SZ_STR(convert);
- trie->startstate = state;
- trie->minlen -= (state - 1);
- trie->maxlen -= (state - 1);
-#ifdef DEBUGGING
- /* At least the UNICOS C compiler choked on this
- * being argument to DEBUG_r(), so let's just have
- * it right here. */
- if (
-#ifdef PERL_EXT_RE_BUILD
- 1
-#else
- DEBUG_r_TEST
-#endif
- ) {
- regnode *fix = convert;
- U32 word = trie->wordcount;
- mjd_nodelen++;
- Set_Node_Offset_Length(convert, mjd_offset, state - 1);
- while( ++fix < n ) {
- Set_Node_Offset_Length(fix, 0, 0);
- }
- while (word--) {
- SV ** const tmp = av_fetch( trie_words, word, 0 );
- if (tmp) {
- if ( STR_LEN(convert) <= SvCUR(*tmp) )
- sv_chop(*tmp, SvPV_nolen(*tmp) + STR_LEN(convert));
- else
- sv_chop(*tmp, SvPV_nolen(*tmp) + SvCUR(*tmp));
- }
- }
- }
-#endif
- if (trie->maxlen) {
- convert = n;
- } else {
- NEXT_OFF(convert) = (U16)(tail - convert);
- DEBUG_r(optimize= n);
- }
- }
- }
- if (!jumper)
- jumper = last;
- if ( trie->maxlen ) {
- NEXT_OFF( convert ) = (U16)(tail - convert);
- ARG_SET( convert, data_slot );
- /* Store the offset to the first unabsorbed branch in
- jump[0], which is otherwise unused by the jump logic.
- We use this when dumping a trie and during optimisation. */
- if (trie->jump)
- trie->jump[0] = (U16)(nextbranch - convert);
-
- /* XXXX */
- if ( !trie->states[trie->startstate].wordnum && trie->bitmap &&
- ( (char *)jumper - (char *)convert) >= (int)sizeof(struct regnode_charclass) )
- {
- OP( convert ) = TRIEC;
- Copy(trie->bitmap, ((struct regnode_charclass *)convert)->bitmap, ANYOF_BITMAP_SIZE, char);
- PerlMemShared_free(trie->bitmap);
- trie->bitmap= NULL;
- } else
- OP( convert ) = TRIE;
-
- /* store the type in the flags */
- convert->flags = nodetype;
- DEBUG_r({
- optimize = convert
- + NODE_STEP_REGNODE
- + regarglen[ OP( convert ) ];
- });
- /* XXX We really should free up the resource in trie now,
- as we won't use them - (which resources?) dmq */
- }
- /* needed for dumping*/
- DEBUG_r(if (optimize) {
- regnode *opt = convert;
-
- while ( ++opt < optimize) {
- Set_Node_Offset_Length(opt,0,0);
- }
- /*
- Try to clean up some of the debris left after the
- optimisation.
- */
- while( optimize < jumper ) {
- mjd_nodelen += Node_Length((optimize));
- OP( optimize ) = OPTIMIZED;
- Set_Node_Offset_Length(optimize,0,0);
- optimize++;
- }
- Set_Node_Offset_Length(convert,mjd_offset,mjd_nodelen);
- });
- } /* end node insert */
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, convert);
- RExC_rxi->data->data[ data_slot + 1 ] = (void*)widecharmap;
-#ifdef DEBUGGING
- RExC_rxi->data->data[ data_slot + TRIE_WORDS_OFFSET ] = (void*)trie_words;
- RExC_rxi->data->data[ data_slot + 3 ] = (void*)revcharmap;
-#else
- SvREFCNT_dec(revcharmap);
-#endif
- return trie->jump
- ? MADE_JUMP_TRIE
- : trie->startstate>1
- ? MADE_EXACT_TRIE
- : MADE_TRIE;
-}
-
-STATIC void
-S_make_trie_failtable(pTHX_ RExC_state_t *pRExC_state, regnode *source, regnode *stclass, U32 depth)
-{
-/* The Trie is constructed and compressed now so we can build a fail array now if its needed
-
- This is basically the Aho-Corasick algorithm. Its from exercise 3.31 and 3.32 in the
- "Red Dragon" -- Compilers, principles, techniques, and tools. Aho, Sethi, Ullman 1985/88
- ISBN 0-201-10088-6
-
- We find the fail state for each state in the trie, this state is the longest proper
- suffix of the current states 'word' that is also a proper prefix of another word in our
- trie. State 1 represents the word '' and is the thus the default fail state. This allows
- the DFA not to have to restart after its tried and failed a word at a given point, it
- simply continues as though it had been matching the other word in the first place.
- Consider
- 'abcdgu'=~/abcdefg|cdgu/
- When we get to 'd' we are still matching the first word, we would encounter 'g' which would
- fail, which would bring use to the state representing 'd' in the second word where we would
- try 'g' and succeed, prodceding to match 'cdgu'.
- */
- /* add a fail transition */
- const U32 trie_offset = ARG(source);
- reg_trie_data *trie=(reg_trie_data *)RExC_rxi->data->data[trie_offset];
- U32 *q;
- const U32 ucharcount = trie->uniquecharcount;
- const U32 numstates = trie->statecount;
- const U32 ubound = trie->lasttrans + ucharcount;
- U32 q_read = 0;
- U32 q_write = 0;
- U32 charid;
- U32 base = trie->states[ 1 ].trans.base;
- U32 *fail;
- reg_ac_data *aho;
- const U32 data_slot = add_data( pRExC_state, 1, "T" );
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE_FAILTABLE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
-
- ARG_SET( stclass, data_slot );
- aho = (reg_ac_data *) PerlMemShared_calloc( 1, sizeof(reg_ac_data) );
- RExC_rxi->data->data[ data_slot ] = (void*)aho;
- aho->trie=trie_offset;
- aho->states=(reg_trie_state *)PerlMemShared_malloc( numstates * sizeof(reg_trie_state) );
- Copy( trie->states, aho->states, numstates, reg_trie_state );
- Newxz( q, numstates, U32);
- aho->fail = (U32 *) PerlMemShared_calloc( numstates, sizeof(U32) );
- aho->refcount = 1;
- fail = aho->fail;
- /* initialize fail[0..1] to be 1 so that we always have
- a valid final fail state */
- fail[ 0 ] = fail[ 1 ] = 1;
-
- for ( charid = 0; charid < ucharcount ; charid++ ) {
- const U32 newstate = TRIE_TRANS_STATE( 1, base, ucharcount, charid, 0 );
- if ( newstate ) {
- q[ q_write ] = newstate;
- /* set to point at the root */
- fail[ q[ q_write++ ] ]=1;
- }
- }
- while ( q_read < q_write) {
- const U32 cur = q[ q_read++ % numstates ];
- base = trie->states[ cur ].trans.base;
-
- for ( charid = 0 ; charid < ucharcount ; charid++ ) {
- const U32 ch_state = TRIE_TRANS_STATE( cur, base, ucharcount, charid, 1 );
- if (ch_state) {
- U32 fail_state = cur;
- U32 fail_base;
- do {
- fail_state = fail[ fail_state ];
- fail_base = aho->states[ fail_state ].trans.base;
- } while ( !TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ) );
-
- fail_state = TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 );
- fail[ ch_state ] = fail_state;
- if ( !aho->states[ ch_state ].wordnum && aho->states[ fail_state ].wordnum )
- {
- aho->states[ ch_state ].wordnum = aho->states[ fail_state ].wordnum;
- }
- q[ q_write++ % numstates] = ch_state;
- }
- }
- }
- /* restore fail[0..1] to 0 so that we "fall out" of the AC loop
- when we fail in state 1, this allows us to use the
- charclass scan to find a valid start char. This is based on the principle
- that theres a good chance the string being searched contains lots of stuff
- that cant be a start char.
- */
- fail[ 0 ] = fail[ 1 ] = 0;
- DEBUG_TRIE_COMPILE_r({
- PerlIO_printf(Perl_debug_log,
- "%*sStclass Failtable (%"UVuf" states): 0",
- (int)(depth * 2), "", (UV)numstates
- );
- for( q_read=1; q_read<numstates; q_read++ ) {
- PerlIO_printf(Perl_debug_log, ", %"UVuf, (UV)fail[q_read]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
- Safefree(q);
- /*RExC_seen |= REG_SEEN_TRIEDFA;*/
-}
-
-
-/*
- * There are strange code-generation bugs caused on sparc64 by gcc-2.95.2.
- * These need to be revisited when a newer toolchain becomes available.
- */
-#if defined(__sparc64__) && defined(__GNUC__)
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
-# undef SPARC64_GCC_WORKAROUND
-# define SPARC64_GCC_WORKAROUND 1
-# endif
-#endif
-
-#define DEBUG_PEEP(str,scan,depth) \
- DEBUG_OPTIMISE_r({if (scan){ \
- SV * const mysv=sv_newmortal(); \
- regnode *Next = regnext(scan); \
- regprop(RExC_rx, mysv, scan); \
- PerlIO_printf(Perl_debug_log, "%*s" str ">%3d: %s (%d)\n", \
- (int)depth*2, "", REG_NODE_NUM(scan), SvPV_nolen_const(mysv),\
- Next ? (REG_NODE_NUM(Next)) : 0 ); \
- }});
-
-
-
-
-
-#define JOIN_EXACT(scan,min,flags) \
- if (PL_regkind[OP(scan)] == EXACT) \
- join_exact(pRExC_state,(scan),(min),(flags),NULL,depth+1)
-
-STATIC U32
-S_join_exact(pTHX_ RExC_state_t *pRExC_state, regnode *scan, I32 *min, U32 flags,regnode *val, U32 depth) {
- /* Merge several consecutive EXACTish nodes into one. */
- regnode *n = regnext(scan);
- U32 stringok = 1;
- regnode *next = scan + NODE_SZ_STR(scan);
- U32 merged = 0;
- U32 stopnow = 0;
-#ifdef DEBUGGING
- regnode *stop = scan;
- GET_RE_DEBUG_FLAGS_DECL;
-#else
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_JOIN_EXACT;
-#ifndef EXPERIMENTAL_INPLACESCAN
- PERL_UNUSED_ARG(flags);
- PERL_UNUSED_ARG(val);
-#endif
- DEBUG_PEEP("join",scan,depth);
-
- /* Skip NOTHING, merge EXACT*. */
- while (n &&
- ( PL_regkind[OP(n)] == NOTHING ||
- (stringok && (OP(n) == OP(scan))))
- && NEXT_OFF(n)
- && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) {
-
- if (OP(n) == TAIL || n > next)
- stringok = 0;
- if (PL_regkind[OP(n)] == NOTHING) {
- DEBUG_PEEP("skip:",n,depth);
- NEXT_OFF(scan) += NEXT_OFF(n);
- next = n + NODE_STEP_REGNODE;
-#ifdef DEBUGGING
- if (stringok)
- stop = n;
-#endif
- n = regnext(n);
- }
- else if (stringok) {
- const unsigned int oldl = STR_LEN(scan);
- regnode * const nnext = regnext(n);
-
- DEBUG_PEEP("merg",n,depth);
-
- merged++;
- if (oldl + STR_LEN(n) > U8_MAX)
- break;
- NEXT_OFF(scan) += NEXT_OFF(n);
- STR_LEN(scan) += STR_LEN(n);
- next = n + NODE_SZ_STR(n);
- /* Now we can overwrite *n : */
- Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char);
-#ifdef DEBUGGING
- stop = next - 1;
-#endif
- n = nnext;
- if (stopnow) break;
- }
-
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (flags && !NEXT_OFF(n)) {
- DEBUG_PEEP("atch", val, depth);
- if (reg_off_by_arg[OP(n)]) {
- ARG_SET(n, val - n);
- }
- else {
- NEXT_OFF(n) = val - n;
- }
- stopnow = 1;
- }
-#endif
- }
-
- if (UTF && ( OP(scan) == EXACTF ) && ( STR_LEN(scan) >= 6 ) ) {
- /*
- Two problematic code points in Unicode casefolding of EXACT nodes:
-
- U+0390 - GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS
- U+03B0 - GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS
-
- which casefold to
-
- Unicode UTF-8
-
- U+03B9 U+0308 U+0301 0xCE 0xB9 0xCC 0x88 0xCC 0x81
- U+03C5 U+0308 U+0301 0xCF 0x85 0xCC 0x88 0xCC 0x81
-
- This means that in case-insensitive matching (or "loose matching",
- as Unicode calls it), an EXACTF of length six (the UTF-8 encoded byte
- length of the above casefolded versions) can match a target string
- of length two (the byte length of UTF-8 encoded U+0390 or U+03B0).
- This would rather mess up the minimum length computation.
-
- What we'll do is to look for the tail four bytes, and then peek
- at the preceding two bytes to see whether we need to decrease
- the minimum length by four (six minus two).
-
- Thanks to the design of UTF-8, there cannot be false matches:
- A sequence of valid UTF-8 bytes cannot be a subsequence of
- another valid sequence of UTF-8 bytes.
-
- */
- char * const s0 = STRING(scan), *s, *t;
- char * const s1 = s0 + STR_LEN(scan) - 1;
- char * const s2 = s1 - 4;
-#ifdef EBCDIC /* RD tunifold greek 0390 and 03B0 */
- const char t0[] = "\xaf\x49\xaf\x42";
-#else
- const char t0[] = "\xcc\x88\xcc\x81";
-#endif
- const char * const t1 = t0 + 3;
-
- for (s = s0 + 2;
- s < s2 && (t = ninstr(s, s1, t0, t1));
- s = t + 4) {
-#ifdef EBCDIC
- if (((U8)t[-1] == 0x68 && (U8)t[-2] == 0xB4) ||
- ((U8)t[-1] == 0x46 && (U8)t[-2] == 0xB5))
-#else
- if (((U8)t[-1] == 0xB9 && (U8)t[-2] == 0xCE) ||
- ((U8)t[-1] == 0x85 && (U8)t[-2] == 0xCF))
-#endif
- *min -= 4;
- }
- }
-
-#ifdef DEBUGGING
- /* Allow dumping */
- n = scan + NODE_SZ_STR(scan);
- while (n <= stop) {
- if (PL_regkind[OP(n)] != NOTHING || OP(n) == NOTHING) {
- OP(n) = OPTIMIZED;
- NEXT_OFF(n) = 0;
- }
- n++;
- }
-#endif
- DEBUG_OPTIMISE_r(if (merged){DEBUG_PEEP("finl",scan,depth)});
- return stopnow;
-}
-
-/* REx optimizer. Converts nodes into quickier variants "in place".
- Finds fixed substrings. */
-
-/* Stops at toplevel WHILEM as well as at "last". At end *scanp is set
- to the position after last scanned or to NULL. */
-
-#define INIT_AND_WITHP \
- assert(!and_withp); \
- Newx(and_withp,1,struct regnode_charclass_class); \
- SAVEFREEPV(and_withp)
-
-/* this is a chain of data about sub patterns we are processing that
- need to be handled seperately/specially in study_chunk. Its so
- we can simulate recursion without losing state. */
-struct scan_frame;
-typedef struct scan_frame {
- regnode *last; /* last node to process in this frame */
- regnode *next; /* next node to process when last is reached */
- struct scan_frame *prev; /*previous frame*/
- I32 stop; /* what stopparen do we use */
-} scan_frame;
-
-
-#define SCAN_COMMIT(s, data, m) scan_commit(s, data, m, is_inf)
-
-#define CASE_SYNST_FNC(nAmE) \
-case nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break; \
-case N ## nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break
-
-
-
-STATIC I32
-S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp,
- I32 *minlenp, I32 *deltap,
- regnode *last,
- scan_data_t *data,
- I32 stopparen,
- U8* recursed,
- struct regnode_charclass_class *and_withp,
- U32 flags, U32 depth)
- /* scanp: Start here (read-write). */
- /* deltap: Write maxlen-minlen here. */
- /* last: Stop before this one. */
- /* data: string data about the pattern */
- /* stopparen: treat close N as END */
- /* recursed: which subroutines have we recursed into */
- /* and_withp: Valid if flags & SCF_DO_STCLASS_OR */
-{
- dVAR;
- I32 min = 0, pars = 0, code;
- regnode *scan = *scanp, *next;
- I32 delta = 0;
- int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF);
- int is_inf_internal = 0; /* The studied chunk is infinite */
- I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0;
- scan_data_t data_fake;
- SV *re_trie_maxbuff = NULL;
- regnode *first_non_open = scan;
- I32 stopmin = I32_MAX;
- scan_frame *frame = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_STUDY_CHUNK;
-
-#ifdef DEBUGGING
- StructCopy(&zero_scan_data, &data_fake, scan_data_t);
-#endif
-
- if ( depth == 0 ) {
- while (first_non_open && OP(first_non_open) == OPEN)
- first_non_open=regnext(first_non_open);
- }
-
-
- fake_study_recurse:
- while ( scan && OP(scan) != END && scan < last ){
- /* Peephole optimizer: */
- DEBUG_STUDYDATA("Peep:", data,depth);
- DEBUG_PEEP("Peep",scan,depth);
- JOIN_EXACT(scan,&min,0);
-
- /* Follow the next-chain of the current node and optimize
- away all the NOTHINGs from it. */
- if (OP(scan) != CURLYX) {
- const int max = (reg_off_by_arg[OP(scan)]
- ? I32_MAX
- /* I32 may be smaller than U16 on CRAYs! */
- : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX));
- int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan));
- int noff;
- regnode *n = scan;
-
- /* Skip NOTHING and LONGJMP. */
- while ((n = regnext(n))
- && ((PL_regkind[OP(n)] == NOTHING && (noff = NEXT_OFF(n)))
- || ((OP(n) == LONGJMP) && (noff = ARG(n))))
- && off + noff < max)
- off += noff;
- if (reg_off_by_arg[OP(scan)])
- ARG(scan) = off;
- else
- NEXT_OFF(scan) = off;
- }
-
-
-
- /* The principal pseudo-switch. Cannot be a switch, since we
- look into several different things. */
- if (OP(scan) == BRANCH || OP(scan) == BRANCHJ
- || OP(scan) == IFTHEN) {
- next = regnext(scan);
- code = OP(scan);
- /* demq: the op(next)==code check is to see if we have "branch-branch" AFAICT */
-
- if (OP(next) == code || code == IFTHEN) {
- /* NOTE - There is similar code to this block below for handling
- TRIE nodes on a re-study. If you change stuff here check there
- too. */
- I32 max1 = 0, min1 = I32_MAX, num = 0;
- struct regnode_charclass_class accum;
- regnode * const startbranch=scan;
-
- if (flags & SCF_DO_SUBSTR)
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- while (OP(scan) == code) {
- I32 deltanext, minnext, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- num++;
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
-
- data_fake.pos_delta = delta;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- if (code != BRANCH)
- scan = NEXTOPER(scan);
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- /* we suppose the run is continuous, last=next...*/
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- next, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- if (min1 > minnext)
- min1 = minnext;
- if (max1 < minnext + deltanext)
- max1 = minnext + deltanext;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
- scan = next;
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > minnext)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- if (code == IFTHEN && num < 2) /* Empty ELSE branch */
- min1 = 0;
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
-
- if (PERL_ENABLE_TRIE_OPTIMISATION && OP( startbranch ) == BRANCH ) {
- /* demq.
-
- Assuming this was/is a branch we are dealing with: 'scan' now
- points at the item that follows the branch sequence, whatever
- it is. We now start at the beginning of the sequence and look
- for subsequences of
-
- BRANCH->EXACT=>x1
- BRANCH->EXACT=>x2
- tail
-
- which would be constructed from a pattern like /A|LIST|OF|WORDS/
-
- If we can find such a subseqence we need to turn the first
- element into a trie and then add the subsequent branch exact
- strings to the trie.
-
- We have two cases
-
- 1. patterns where the whole set of branch can be converted.
-
- 2. patterns where only a subset can be converted.
-
- In case 1 we can replace the whole set with a single regop
- for the trie. In case 2 we need to keep the start and end
- branchs so
-
- 'BRANCH EXACT; BRANCH EXACT; BRANCH X'
- becomes BRANCH TRIE; BRANCH X;
-
- There is an additional case, that being where there is a
- common prefix, which gets split out into an EXACT like node
- preceding the TRIE node.
-
- If x(1..n)==tail then we can do a simple trie, if not we make
- a "jump" trie, such that when we match the appropriate word
- we "jump" to the appopriate tail node. Essentailly we turn
- a nested if into a case structure of sorts.
-
- */
-
- int made=0;
- if (!re_trie_maxbuff) {
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff))
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- if ( SvIV(re_trie_maxbuff)>=0 ) {
- regnode *cur;
- regnode *first = (regnode *)NULL;
- regnode *last = (regnode *)NULL;
- regnode *tail = scan;
- U8 optype = 0;
- U32 count=0;
-
-#ifdef DEBUGGING
- SV * const mysv = sv_newmortal(); /* for dumping */
-#endif
- /* var tail is used because there may be a TAIL
- regop in the way. Ie, the exacts will point to the
- thing following the TAIL, but the last branch will
- point at the TAIL. So we advance tail. If we
- have nested (?:) we may have to move through several
- tails.
- */
-
- while ( OP( tail ) == TAIL ) {
- /* this is the TAIL generated by (?:) */
- tail = regnext( tail );
- }
-
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, tail );
- PerlIO_printf( Perl_debug_log, "%*s%s%s\n",
- (int)depth * 2 + 2, "",
- "Looking for TRIE'able sequences. Tail node is: ",
- SvPV_nolen_const( mysv )
- );
- });
-
- /*
-
- step through the branches, cur represents each
- branch, noper is the first thing to be matched
- as part of that branch and noper_next is the
- regnext() of that node. if noper is an EXACT
- and noper_next is the same as scan (our current
- position in the regex) then the EXACT branch is
- a possible optimization target. Once we have
- two or more consequetive such branches we can
- create a trie of the EXACT's contents and stich
- it in place. If the sequence represents all of
- the branches we eliminate the whole thing and
- replace it with a single TRIE. If it is a
- subsequence then we need to stitch it in. This
- means the first branch has to remain, and needs
- to be repointed at the item on the branch chain
- following the last branch optimized. This could
- be either a BRANCH, in which case the
- subsequence is internal, or it could be the
- item following the branch sequence in which
- case the subsequence is at the end.
-
- */
-
- /* dont use tail as the end marker for this traverse */
- for ( cur = startbranch ; cur != scan ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
-#if defined(DEBUGGING) || defined(NOJUMPTRIE)
- regnode * const noper_next = regnext( noper );
-#endif
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log, "%*s- %s (%d)",
- (int)depth * 2 + 2,"", SvPV_nolen_const( mysv ), REG_NODE_NUM(cur) );
-
- regprop(RExC_rx, mysv, noper);
- PerlIO_printf( Perl_debug_log, " -> %s",
- SvPV_nolen_const(mysv));
-
- if ( noper_next ) {
- regprop(RExC_rx, mysv, noper_next );
- PerlIO_printf( Perl_debug_log,"\t=> %s\t",
- SvPV_nolen_const(mysv));
- }
- PerlIO_printf( Perl_debug_log, "(First==%d,Last==%d,Cur==%d)\n",
- REG_NODE_NUM(first), REG_NODE_NUM(last), REG_NODE_NUM(cur) );
- });
- if ( (((first && optype!=NOTHING) ? OP( noper ) == optype
- : PL_regkind[ OP( noper ) ] == EXACT )
- || OP(noper) == NOTHING )
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- && count < U16_MAX)
- {
- count++;
- if ( !first || optype == NOTHING ) {
- if (!first) first = cur;
- optype = OP( noper );
- } else {
- last = cur;
- }
- } else {
-/*
- Currently we do not believe that the trie logic can
- handle case insensitive matching properly when the
- pattern is not unicode (thus forcing unicode semantics).
-
- If/when this is fixed the following define can be swapped
- in below to fully enable trie logic.
-
-#define TRIE_TYPE_IS_SAFE 1
-
-*/
-#define TRIE_TYPE_IS_SAFE (UTF || optype==EXACT)
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- make_trie( pRExC_state,
- startbranch, first, cur, tail, count,
- optype, depth+1 );
- }
- if ( PL_regkind[ OP( noper ) ] == EXACT
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- ){
- count = 1;
- first = cur;
- optype = OP( noper );
- } else {
- count = 0;
- first = NULL;
- optype = 0;
- }
- last = NULL;
- }
- }
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log,
- "%*s- %s (%d) <SCAN FINISHED>\n", (int)depth * 2 + 2,
- "", SvPV_nolen_const( mysv ),REG_NODE_NUM(cur));
-
- });
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- made= make_trie( pRExC_state, startbranch, first, scan, tail, count, optype, depth+1 );
-#ifdef TRIE_STUDY_OPT
- if ( ((made == MADE_EXACT_TRIE &&
- startbranch == first)
- || ( first_non_open == first )) &&
- depth==0 ) {
- flags |= SCF_TRIE_RESTUDY;
- if ( startbranch == first
- && scan == tail )
- {
- RExC_seen &=~REG_TOP_LEVEL_BRANCHES;
- }
- }
-#endif
- }
- }
-
- } /* do trie */
-
- }
- else if ( code == BRANCHJ ) { /* single branch is optimized. */
- scan = NEXTOPER(NEXTOPER(scan));
- } else /* single branch is optimized. */
- scan = NEXTOPER(scan);
- continue;
- } else if (OP(scan) == SUSPEND || OP(scan) == GOSUB || OP(scan) == GOSTART) {
- scan_frame *newframe = NULL;
- I32 paren;
- regnode *start;
- regnode *end;
-
- if (OP(scan) != SUSPEND) {
- /* set the pointer */
- if (OP(scan) == GOSUB) {
- paren = ARG(scan);
- RExC_recurse[ARG2L(scan)] = scan;
- start = RExC_open_parens[paren-1];
- end = RExC_close_parens[paren-1];
- } else {
- paren = 0;
- start = RExC_rxi->program + 1;
- end = RExC_opend;
- }
- if (!recursed) {
- Newxz(recursed, (((RExC_npar)>>3) +1), U8);
- SAVEFREEPV(recursed);
- }
- if (!PAREN_TEST(recursed,paren+1)) {
- PAREN_SET(recursed,paren+1);
- Newx(newframe,1,scan_frame);
- } else {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- } else {
- Newx(newframe,1,scan_frame);
- paren = stopparen;
- start = scan+2;
- end = regnext(scan);
- }
- if (newframe) {
- assert(start);
- assert(end);
- SAVEFREEPV(newframe);
- newframe->next = regnext(scan);
- newframe->last = last;
- newframe->stop = stopparen;
- newframe->prev = frame;
-
- frame = newframe;
- scan = start;
- stopparen = paren;
- last = end;
-
- continue;
- }
- }
- else if (OP(scan) == EXACT) {
- I32 l = STR_LEN(scan);
- UV uc;
- if (UTF) {
- const U8 * const s = (U8*)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- } else {
- uc = *((U8*)STRING(scan));
- }
- min += l;
- if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */
- /* The code below prefers earlier match for fixed
- offset, later match for variable offset. */
- if (data->last_end == -1) { /* Update the start info. */
- data->last_start_min = data->pos_min;
- data->last_start_max = is_inf
- ? I32_MAX : data->pos_min + data->pos_delta;
- }
- sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan));
- if (UTF)
- SvUTF8_on(data->last_found);
- {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += utf8_length((U8*)STRING(scan),
- (U8*)STRING(scan)+STR_LEN(scan));
- }
- data->last_end = data->pos_min + l;
- data->pos_min += l; /* As in the first entry. */
- data->flags &= ~SF_BEFORE_EOL;
- }
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && (!(data->start_class->flags & ANYOF_FOLD)
- || !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- )
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- if (uc < 0x100)
- data->start_class->flags &= ~ANYOF_UNICODE_ALL;
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- /* false positive possible if the class is case-folded */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- else
- data->start_class->flags |= ANYOF_UNICODE_ALL;
- data->start_class->flags &= ~ANYOF_EOS;
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (PL_regkind[OP(scan)] == EXACT) { /* But OP != EXACT! */
- I32 l = STR_LEN(scan);
- UV uc = *((U8*)STRING(scan));
-
- /* Search for fixed substrings supports EXACT only. */
- if (flags & SCF_DO_SUBSTR) {
- assert(data);
- SCAN_COMMIT(pRExC_state, data, minlenp);
- }
- if (UTF) {
- const U8 * const s = (U8 *)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- }
- min += l;
- if (flags & SCF_DO_SUBSTR)
- data->pos_min += l;
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat) {
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- data->start_class->flags |= ANYOF_FOLD;
- if (OP(scan) == EXACTFL)
- data->start_class->flags |= ANYOF_LOCALE;
- }
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- if (data->start_class->flags & ANYOF_FOLD) {
- /* false positive possible if the class is case-folded.
- Assume that the locale settings are the same... */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- }
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (strchr((const char*)PL_varies,OP(scan))) {
- I32 mincount, maxcount, minnext, deltanext, fl = 0;
- I32 f = flags, pos_before = 0;
- regnode * const oscan = scan;
- struct regnode_charclass_class this_class;
- struct regnode_charclass_class *oclass = NULL;
- I32 next_is_eval = 0;
-
- switch (PL_regkind[OP(scan)]) {
- case WHILEM: /* End of (?:...)* . */
- scan = NEXTOPER(scan);
- goto finish;
- case PLUS:
- if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) {
- next = NEXTOPER(scan);
- if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) {
- mincount = 1;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- }
- if (flags & SCF_DO_SUBSTR)
- data->pos_min++;
- min++;
- /* Fall through. */
- case STAR:
- if (flags & SCF_DO_STCLASS) {
- mincount = 0;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- is_inf = is_inf_internal = 1;
- scan = regnext(scan);
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot extend fixed substrings */
- data->longest = &(data->longest_float);
- }
- goto optimize_curly_tail;
- case CURLY:
- if (stopparen>0 && (OP(scan)==CURLYN || OP(scan)==CURLYM)
- && (scan->flags == stopparen))
- {
- mincount = 1;
- maxcount = 1;
- } else {
- mincount = ARG1(scan);
- maxcount = ARG2(scan);
- }
- next = regnext(scan);
- if (OP(scan) == CURLYX) {
- I32 lp = (data ? *(data->last_closep) : 0);
- scan->flags = ((lp <= (I32)U8_MAX) ? (U8)lp : U8_MAX);
- }
- scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- next_is_eval = (OP(scan) == EVAL);
- do_curly:
- if (flags & SCF_DO_SUBSTR) {
- if (mincount == 0) SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot extend fixed substrings */
- pos_before = data->pos_min;
- }
- if (data) {
- fl = data->flags;
- data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL);
- if (is_inf)
- data->flags |= SF_IS_INF;
- }
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- oclass = data->start_class;
- data->start_class = &this_class;
- f |= SCF_DO_STCLASS_AND;
- f &= ~SCF_DO_STCLASS_OR;
- }
- /* These are the cases when once a subexpression
- fails at a particular position, it cannot succeed
- even after backtracking at the enclosing scope.
-
- XXXX what if minimal match and we are at the
- initial run of {n,m}? */
- if ((mincount != maxcount - 1) && (maxcount != REG_INFTY))
- f &= ~SCF_WHILEM_VISITED_POS;
-
- /* This will finish on WHILEM, setting scan, or on NULL: */
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- last, data, stopparen, recursed, NULL,
- (mincount == 0
- ? (f & ~SCF_DO_SUBSTR) : f),depth+1);
-
- if (flags & SCF_DO_STCLASS)
- data->start_class = oclass;
- if (mincount == 0 || minnext == 0) {
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&this_class, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- } else { /* Non-zero len */
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- cl_and(data->start_class, and_withp);
- }
- else if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class, &this_class);
- flags &= ~SCF_DO_STCLASS;
- }
- if (!scan) /* It was not CURLYX, but CURLY. */
- scan = next;
- if ( /* ? quantifier ok, except for (?{ ... }) */
- (next_is_eval || !(mincount == 0 && maxcount == 1))
- && (minnext == 0) && (deltanext == 0)
- && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR))
- && maxcount <= REG_INFTY/3) /* Complement check for big count */
- {
- ckWARNreg(RExC_parse,
- "Quantifier unexpected on zero-length expression");
- }
-
- min += minnext * mincount;
- is_inf_internal |= ((maxcount == REG_INFTY
- && (minnext + deltanext) > 0)
- || deltanext == I32_MAX);
- is_inf |= is_inf_internal;
- delta += (minnext + deltanext) * maxcount - minnext * mincount;
-
- /* Try powerful optimization CURLYX => CURLYN. */
- if ( OP(oscan) == CURLYX && data
- && data->flags & SF_IN_PAR
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext && minnext == 1 ) {
- /* Try to optimize to CURLYN. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS;
- regnode * const nxt1 = nxt;
-#ifdef DEBUGGING
- regnode *nxt2;
-#endif
-
- /* Skip open. */
- nxt = regnext(nxt);
- if (!strchr((const char*)PL_simple,OP(nxt))
- && !(PL_regkind[OP(nxt)] == EXACT
- && STR_LEN(nxt) == 1))
- goto nogo;
-#ifdef DEBUGGING
- nxt2 = nxt;
-#endif
- nxt = regnext(nxt);
- if (OP(nxt) != CLOSE)
- goto nogo;
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt+2; /*close->while*/
- }
- /* Now we know that nxt2 is the only contents: */
- oscan->flags = (U8)ARG(nxt);
- OP(oscan) = CURLYN;
- OP(nxt1) = NOTHING; /* was OPEN. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */
-#endif
- }
- nogo:
-
- /* Try optimization CURLYX => CURLYM. */
- if ( OP(oscan) == CURLYX && data
- && !(data->flags & SF_HAS_PAR)
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext /* atom is fixed width */
- && minnext != 0 /* CURLYM can't handle zero width */
- ) {
- /* XXXX How to optimize if data == 0? */
- /* Optimize to a simpler form. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */
- regnode *nxt2;
-
- OP(oscan) = CURLYM;
- while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/
- && (OP(nxt2) != WHILEM))
- nxt = nxt2;
- OP(nxt2) = SUCCEED; /* Whas WHILEM */
- /* Need to optimize away parenths. */
- if (data->flags & SF_IN_PAR) {
- /* Set the parenth number. */
- regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/
-
- if (OP(nxt) != CLOSE)
- FAIL("Panic opt close");
- oscan->flags = (U8)ARG(nxt);
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt2+1; /*close->NOTHING*/
- }
- OP(nxt1) = OPTIMIZED; /* was OPEN. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */
-#endif
-#if 0
- while ( nxt1 && (OP(nxt1) != WHILEM)) {
- regnode *nnxt = regnext(nxt1);
-
- if (nnxt == nxt) {
- if (reg_off_by_arg[OP(nxt1)])
- ARG_SET(nxt1, nxt2 - nxt1);
- else if (nxt2 - nxt1 < U16_MAX)
- NEXT_OFF(nxt1) = nxt2 - nxt1;
- else
- OP(nxt) = NOTHING; /* Cannot beautify */
- }
- nxt1 = nnxt;
- }
-#endif
- /* Optimize again: */
- study_chunk(pRExC_state, &nxt1, minlenp, &deltanext, nxt,
- NULL, stopparen, recursed, NULL, 0,depth+1);
- }
- else
- oscan->flags = 0;
- }
- else if ((OP(oscan) == CURLYX)
- && (flags & SCF_WHILEM_VISITED_POS)
- /* See the comment on a similar expression above.
- However, this time it not a subexpression
- we care about, but the expression itself. */
- && (maxcount == REG_INFTY)
- && data && ++data->whilem_c < 16) {
- /* This stays as CURLYX, we can put the count/of pair. */
- /* Find WHILEM (as in regexec.c) */
- regnode *nxt = oscan + NEXT_OFF(oscan);
-
- if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */
- nxt += ARG(nxt);
- PREVOPER(nxt)->flags = (U8)(data->whilem_c
- | (RExC_whilem_seen << 4)); /* On WHILEM */
- }
- if (data && fl & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (flags & SCF_DO_SUBSTR) {
- SV *last_str = NULL;
- int counted = mincount != 0;
-
- if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */
-#if defined(SPARC64_GCC_WORKAROUND)
- I32 b = 0;
- STRLEN l = 0;
- const char *s = NULL;
- I32 old = 0;
-
- if (pos_before >= data->last_start_min)
- b = pos_before;
- else
- b = data->last_start_min;
-
- l = 0;
- s = SvPV_const(data->last_found, l);
- old = b - data->last_start_min;
-
-#else
- I32 b = pos_before >= data->last_start_min
- ? pos_before : data->last_start_min;
- STRLEN l;
- const char * const s = SvPV_const(data->last_found, l);
- I32 old = b - data->last_start_min;
-#endif
-
- if (UTF)
- old = utf8_hop((U8*)s, old) - (U8*)s;
-
- l -= old;
- /* Get the added string: */
- last_str = newSVpvn_utf8(s + old, l, UTF);
- if (deltanext == 0 && pos_before == b) {
- /* What was added is a constant string */
- if (mincount > 1) {
- SvGROW(last_str, (mincount * l) + 1);
- repeatcpy(SvPVX(last_str) + l,
- SvPVX_const(last_str), l, mincount - 1);
- SvCUR_set(last_str, SvCUR(last_str) * mincount);
- /* Add additional parts. */
- SvCUR_set(data->last_found,
- SvCUR(data->last_found) - l);
- sv_catsv(data->last_found, last_str);
- {
- SV * sv = data->last_found;
- MAGIC *mg =
- SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += CHR_SVLEN(last_str) - l;
- }
- data->last_end += l * (mincount - 1);
- }
- } else {
- /* start offset must point into the last copy */
- data->last_start_min += minnext * (mincount - 1);
- data->last_start_max += is_inf ? I32_MAX
- : (maxcount - 1) * (minnext + data->pos_delta);
- }
- }
- /* It is counted once already... */
- data->pos_min += minnext * (mincount - counted);
- data->pos_delta += - counted * deltanext +
- (minnext + deltanext) * maxcount - minnext * mincount;
- if (mincount != maxcount) {
- /* Cannot extend fixed substrings found inside
- the group. */
- SCAN_COMMIT(pRExC_state,data,minlenp);
- if (mincount && last_str) {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
-
- if (mg)
- mg->mg_len = -1;
- sv_setsv(sv, last_str);
- data->last_end = data->pos_min;
- data->last_start_min =
- data->pos_min - CHR_SVLEN(last_str);
- data->last_start_max = is_inf
- ? I32_MAX
- : data->pos_min + data->pos_delta
- - CHR_SVLEN(last_str);
- }
- data->longest = &(data->longest_float);
- }
- SvREFCNT_dec(last_str);
- }
- if (data && (fl & SF_HAS_EVAL))
- data->flags |= SF_HAS_EVAL;
- optimize_curly_tail:
- if (OP(oscan) != CURLYX) {
- while (PL_regkind[OP(next = regnext(oscan))] == NOTHING
- && NEXT_OFF(next))
- NEXT_OFF(oscan) += NEXT_OFF(next);
- }
- continue;
- default: /* REF and CLUMP only? */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR)
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- break;
- }
- }
- else if (OP(scan) == LNBREAK) {
- if (flags & SCF_DO_STCLASS) {
- int value = 0;
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
- if (flags & SCF_DO_STCLASS_AND) {
- for (value = 0; value < 256; value++)
- if (!is_VERTWS_cp(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- for (value = 0; value < 256; value++)
- if (is_VERTWS_cp(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- min += 1;
- delta += 1;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += 1;
- data->longest = &(data->longest_float);
- }
-
- }
- else if (OP(scan) == FOLDCHAR) {
- int d = ARG(scan)==0xDF ? 1 : 2;
- flags &= ~SCF_DO_STCLASS;
- min += 1;
- delta += d;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += d;
- data->longest = &(data->longest_float);
- }
- }
- else if (strchr((const char*)PL_simple,OP(scan))) {
- int value = 0;
-
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->pos_min++;
- }
- min++;
- if (flags & SCF_DO_STCLASS) {
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
-
- /* Some of the logic below assumes that switching
- locale on will only add false positives. */
- switch (PL_regkind[OP(scan)]) {
- case SANY:
- default:
- do_default:
- /* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- break;
- case REG_ANY:
- if (OP(scan) == SANY)
- goto do_default;
- if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */
- value = (ANYOF_BITMAP_TEST(data->start_class,'\n')
- || (data->start_class->flags & ANYOF_CLASS));
- cl_anything(pRExC_state, data->start_class);
- }
- if (flags & SCF_DO_STCLASS_AND || !value)
- ANYOF_BITMAP_CLEAR(data->start_class,'\n');
- break;
- case ANYOF:
- if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class,
- (struct regnode_charclass_class*)scan);
- else
- cl_or(pRExC_state, data->start_class,
- (struct regnode_charclass_class*)scan);
- break;
- case ALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case ALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- }
- else {
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- data->start_class->flags |= ANYOF_LOCALE;
- }
- break;
- case NALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- }
- break;
- case SPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- else {
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case SPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- }
- break;
- case NSPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- else {
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NSPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- }
- break;
- case DIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT);
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NDIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT);
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- CASE_SYNST_FNC(VERTWS);
- CASE_SYNST_FNC(HORIZWS);
-
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (PL_regkind[OP(scan)] == EOL && flags & SCF_DO_SUBSTR) {
- data->flags |= (OP(scan) == MEOL
- ? SF_BEFORE_MEOL
- : SF_BEFORE_SEOL);
- }
- else if ( PL_regkind[OP(scan)] == BRANCHJ
- /* Lookbehind, or need to calculate parens/evals/stclass: */
- && (scan->flags || data || (flags & SCF_DO_STCLASS))
- && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) {
- if ( !PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- || OP(scan) == UNLESSM )
- {
- /* Negative Lookahead/lookbehind
- In this case we can't do fixed string optimisation.
- */
-
- I32 deltanext, minnext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
- minnext = study_chunk(pRExC_state, &nscan, minlenp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f, depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (minnext > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)minnext;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (f & SCF_DO_STCLASS_AND) {
- if (flags & SCF_DO_STCLASS_OR) {
- /* OR before, AND after: ideally we would recurse with
- * data_fake to get the AND applied by study of the
- * remainder of the pattern, and then derecurse;
- * *** HACK *** for now just treat as "no information".
- * See [perl #56690].
- */
- cl_init(pRExC_state, data->start_class);
- } else {
- /* AND before and after: combine and continue */
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- }
-#if PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- else {
- /* Positive Lookahead/lookbehind
- In this case we can do fixed string optimisation,
- but we must be careful about it. Note in the case of
- lookbehind the positions will be offset by the minimum
- length of the pattern, something we won't know about
- until after the recurse.
- */
- I32 deltanext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
- /* We use SAVEFREEPV so that when the full compile
- is finished perl will clean up the allocated
- minlens when its all done. This was we don't
- have to worry about freeing them when we know
- they wont be used, which would be a pain.
- */
- I32 *minnextp;
- Newx( minnextp, 1, I32 );
- SAVEFREEPV(minnextp);
-
- if (data) {
- StructCopy(data, &data_fake, scan_data_t);
- if ((flags & SCF_DO_SUBSTR) && data->last_found) {
- f |= SCF_DO_SUBSTR;
- if (scan->flags)
- SCAN_COMMIT(pRExC_state, &data_fake,minlenp);
- data_fake.last_found=newSVsv(data->last_found);
- }
- }
- else
- data_fake.last_closep = &fake;
- data_fake.flags = 0;
- data_fake.pos_delta = delta;
- if (is_inf)
- data_fake.flags |= SF_IS_INF;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
-
- *minnextp = study_chunk(pRExC_state, &nscan, minnextp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f,depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (*minnextp > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)*minnextp;
- }
-
- *minnextp += min;
-
- if (f & SCF_DO_STCLASS_AND) {
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- if ((flags & SCF_DO_SUBSTR) && data_fake.last_found) {
- if (RExC_rx->minlen<*minnextp)
- RExC_rx->minlen=*minnextp;
- SCAN_COMMIT(pRExC_state, &data_fake, minnextp);
- SvREFCNT_dec(data_fake.last_found);
-
- if ( data_fake.minlen_fixed != minlenp )
- {
- data->offset_fixed= data_fake.offset_fixed;
- data->minlen_fixed= data_fake.minlen_fixed;
- data->lookbehind_fixed+= scan->flags;
- }
- if ( data_fake.minlen_float != minlenp )
- {
- data->minlen_float= data_fake.minlen_float;
- data->offset_float_min=data_fake.offset_float_min;
- data->offset_float_max=data_fake.offset_float_max;
- data->lookbehind_float+= scan->flags;
- }
- }
- }
-
-
- }
-#endif
- }
- else if (OP(scan) == OPEN) {
- if (stopparen != (I32)ARG(scan))
- pars++;
- }
- else if (OP(scan) == CLOSE) {
- if (stopparen == (I32)ARG(scan)) {
- break;
- }
- if ((I32)ARG(scan) == is_par) {
- next = regnext(scan);
-
- if ( next && (OP(next) != WHILEM) && next < last)
- is_par = 0; /* Disable optimization */
- }
- if (data)
- *(data->last_closep) = ARG(scan);
- }
- else if (OP(scan) == EVAL) {
- if (data)
- data->flags |= SF_HAS_EVAL;
- }
- else if ( PL_regkind[OP(scan)] == ENDLIKE ) {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- flags &= ~SCF_DO_SUBSTR;
- }
- if (data && OP(scan)==ACCEPT) {
- data->flags |= SCF_SEEN_ACCEPT;
- if (stopmin > min)
- stopmin = min;
- }
- }
- else if (OP(scan) == LOGICAL && scan->flags == 2) /* Embedded follows */
- {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- else if (OP(scan) == GPOS) {
- if (!(RExC_rx->extflags & RXf_GPOS_FLOAT) &&
- !(delta || is_inf || (data && data->pos_delta)))
- {
- if (!(RExC_rx->extflags & RXf_ANCH) && (flags & SCF_DO_SUBSTR))
- RExC_rx->extflags |= RXf_ANCH_GPOS;
- if (RExC_rx->gofs < (U32)min)
- RExC_rx->gofs = min;
- } else {
- RExC_rx->extflags |= RXf_GPOS_FLOAT;
- RExC_rx->gofs = 0;
- }
- }
-#ifdef TRIE_STUDY_OPT
-#ifdef FULL_TRIE_STUDY
- else if (PL_regkind[OP(scan)] == TRIE) {
- /* NOTE - There is similar code to this block above for handling
- BRANCH nodes on the initial study. If you change stuff here
- check there too. */
- regnode *trie_node= scan;
- regnode *tail= regnext(scan);
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- I32 max1 = 0, min1 = I32_MAX;
- struct regnode_charclass_class accum;
-
- if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */
- SCAN_COMMIT(pRExC_state, data,minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- if (!trie->jump) {
- min1= trie->minlen;
- max1= trie->maxlen;
- } else {
- const regnode *nextbranch= NULL;
- U32 word;
-
- for ( word=1 ; word <= trie->wordcount ; word++)
- {
- I32 deltanext=0, minnext=0, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- if (trie->jump[word]) {
- if (!nextbranch)
- nextbranch = trie_node + trie->jump[0];
- scan= trie_node + trie->jump[word];
- /* We go from the jump point to the branch that follows
- it. Note this means we need the vestigal unused branches
- even though they arent otherwise used.
- */
- minnext = study_chunk(pRExC_state, &scan, minlenp,
- &deltanext, (regnode *)nextbranch, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode*)nextbranch);
-
- if (min1 > (I32)(minnext + trie->minlen))
- min1 = minnext + trie->minlen;
- if (max1 < (I32)(minnext + deltanext + trie->maxlen))
- max1 = minnext + deltanext + trie->maxlen;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
-
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > min + min1)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- }
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- scan= tail;
- continue;
- }
-#else
- else if (PL_regkind[OP(scan)] == TRIE) {
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- U8*bang=NULL;
-
- min += trie->minlen;
- delta += (trie->maxlen - trie->minlen);
- flags &= ~SCF_DO_STCLASS; /* xxx */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += trie->minlen;
- data->pos_delta += (trie->maxlen - trie->minlen);
- if (trie->maxlen != trie->minlen)
- data->longest = &(data->longest_float);
- }
- if (trie->jump) /* no more substrings -- for now /grr*/
- flags &= ~SCF_DO_SUBSTR;
- }
-#endif /* old or new */
-#endif /* TRIE_STUDY_OPT */
-
- /* Else: zero-length, ignore. */
- scan = regnext(scan);
- }
- if (frame) {
- last = frame->last;
- scan = frame->next;
- stopparen = frame->stop;
- frame = frame->prev;
- goto fake_study_recurse;
- }
-
- finish:
- assert(!frame);
- DEBUG_STUDYDATA("pre-fin:",data,depth);
-
- *scanp = scan;
- *deltap = is_inf_internal ? I32_MAX : delta;
- if (flags & SCF_DO_SUBSTR && is_inf)
- data->pos_delta = I32_MAX - data->pos_min;
- if (is_par > (I32)U8_MAX)
- is_par = 0;
- if (is_par && pars==1 && data) {
- data->flags |= SF_IN_PAR;
- data->flags &= ~SF_HAS_PAR;
- }
- else if (pars && data) {
- data->flags |= SF_HAS_PAR;
- data->flags &= ~SF_IN_PAR;
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- if (flags & SCF_TRIE_RESTUDY)
- data->flags |= SCF_TRIE_RESTUDY;
-
- DEBUG_STUDYDATA("post-fin:",data,depth);
-
- return min < stopmin ? min : stopmin;
-}
-
-STATIC U32
-S_add_data(RExC_state_t *pRExC_state, U32 n, const char *s)
-{
- U32 count = RExC_rxi->data ? RExC_rxi->data->count : 0;
-
- PERL_ARGS_ASSERT_ADD_DATA;
-
- Renewc(RExC_rxi->data,
- sizeof(*RExC_rxi->data) + sizeof(void*) * (count + n - 1),
- char, struct reg_data);
- if(count)
- Renew(RExC_rxi->data->what, count + n, U8);
- else
- Newx(RExC_rxi->data->what, n, U8);
- RExC_rxi->data->count = count + n;
- Copy(s, RExC_rxi->data->what + count, n, U8);
- return count;
-}
-
-/*XXX: todo make this not included in a non debugging perl */
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_reginitcolors(pTHX)
-{
- dVAR;
- const char * const s = PerlEnv_getenv("PERL_RE_COLORS");
- if (s) {
- char *t = savepv(s);
- int i = 0;
- PL_colors[0] = t;
- while (++i < 6) {
- t = strchr(t, '\t');
- if (t) {
- *t = '\0';
- PL_colors[i] = ++t;
- }
- else
- PL_colors[i] = t = (char *)"";
- }
- } else {
- int i = 0;
- while (i < 6)
- PL_colors[i++] = (char *)"";
- }
- PL_colorset = 1;
-}
-#endif
-
-
-#ifdef TRIE_STUDY_OPT
-#define CHECK_RESTUDY_GOTO \
- if ( \
- (data.flags & SCF_TRIE_RESTUDY) \
- && ! restudied++ \
- ) goto reStudy
-#else
-#define CHECK_RESTUDY_GOTO
-#endif
-
-/*
- - pregcomp - compile a regular expression into internal code
- *
- * We can't allocate space until we know how big the compiled form will be,
- * but we can't compile it (and thus know how big it is) until we've got a
- * place to put the code. So we cheat: we compile it twice, once with code
- * generation turned off and size counting turned on, and once "for real".
- * This also means that we don't allocate space until we are sure that the
- * thing really will compile successfully, and we never have to move the
- * code and thus invalidate pointers into it. (Note that it has to be in
- * one piece because free() must be able to free it all.) [NB: not true in perl]
- *
- * Beware that the optimization-preparation code in here knows about some
- * of the structure of the compiled regexp. [I'll say.]
- */
-
-
-
-#ifndef PERL_IN_XSUB_RE
-#define RE_ENGINE_PTR &reh_regexp_engine
-#else
-extern const struct regexp_engine my_reg_engine;
-#define RE_ENGINE_PTR &my_reg_engine
-#endif
-
-#ifndef PERL_IN_XSUB_RE
-REGEXP *
-Perl_pregcomp(pTHX_ SV * const pattern, const U32 flags)
-{
- dVAR;
- HV * const table = GvHV(PL_hintgv);
-
- PERL_ARGS_ASSERT_PREGCOMP;
-
- /* Dispatch a request to compile a regexp to correct
- regexp engine. */
- if (table) {
- SV **ptr= hv_fetchs(table, "regcomp", FALSE);
- GET_RE_DEBUG_FLAGS_DECL;
- if (ptr && SvIOK(*ptr) && SvIV(*ptr)) {
- const regexp_engine *eng=INT2PTR(regexp_engine*,SvIV(*ptr));
- DEBUG_COMPILE_r({
- PerlIO_printf(Perl_debug_log, "Using engine %"UVxf"\n",
- SvIV(*ptr));
- });
- return CALLREGCOMP_ENG(eng, pattern, flags);
- }
- }
- return Perl_re_compile(aTHX_ pattern, flags);
-}
-#endif
-
-REGEXP *
-Perl_re_compile(pTHX_ SV * const pattern, U32 pm_flags)
-{
- dVAR;
- REGEXP *rx;
- struct regexp *r;
- register regexp_internal *ri;
- STRLEN plen;
- char *exp = SvPV(pattern, plen);
- char* xend = exp + plen;
- regnode *scan;
- I32 flags;
- I32 minlen = 0;
- I32 sawplus = 0;
- I32 sawopen = 0;
- scan_data_t data;
- RExC_state_t RExC_state;
- RExC_state_t * const pRExC_state = &RExC_state;
-#ifdef TRIE_STUDY_OPT
- int restudied= 0;
- RExC_state_t copyRExC_state;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_COMPILE;
-
- DEBUG_r(if (!PL_colorset) reginitcolors());
-
- RExC_utf8 = RExC_orig_utf8 = SvUTF8(pattern);
-
- DEBUG_COMPILE_r({
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RExC_utf8,
- dsv, exp, plen, 60);
- PerlIO_printf(Perl_debug_log, "%sCompiling REx%s %s\n",
- PL_colors[4],PL_colors[5],s);
- });
-
-redo_first_pass:
- RExC_precomp = exp;
- RExC_flags = pm_flags;
- RExC_sawback = 0;
-
- RExC_seen = 0;
- RExC_seen_zerolen = *exp == '^' ? -1 : 0;
- RExC_seen_evals = 0;
- RExC_extralen = 0;
-
- /* First pass: determine size, legality. */
- RExC_parse = exp;
- RExC_start = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_nestroot = 0;
- RExC_size = 0L;
- RExC_emit = &PL_regdummy;
- RExC_whilem_seen = 0;
- RExC_charnames = NULL;
- RExC_open_parens = NULL;
- RExC_close_parens = NULL;
- RExC_opend = NULL;
- RExC_paren_names = NULL;
-#ifdef DEBUGGING
- RExC_paren_name_list = NULL;
-#endif
- RExC_recurse = NULL;
- RExC_recurse_count = 0;
-
-#if 0 /* REGC() is (currently) a NOP at the first pass.
- * Clever compilers notice this and complain. --jhi */
- REGC((U8)REG_MAGIC, (char*)RExC_emit);
-#endif
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n"));
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- RExC_precomp = NULL;
- return(NULL);
- }
- if (RExC_utf8 && !RExC_orig_utf8) {
- /* It's possible to write a regexp in ascii that represents Unicode
- codepoints outside of the byte range, such as via \x{100}. If we
- detect such a sequence we have to convert the entire pattern to utf8
- and then recompile, as our sizing calculation will have been based
- on 1 byte == 1 character, but we will need to use utf8 to encode
- at least some part of the pattern, and therefore must convert the whole
- thing.
- XXX: somehow figure out how to make this less expensive...
- -- dmq */
- STRLEN len = plen;
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log,
- "UTF8 mismatch! Converting to utf8 for resizing and compile\n"));
- exp = (char*)Perl_bytes_to_utf8(aTHX_ (U8*)exp, &len);
- xend = exp + len;
- RExC_orig_utf8 = RExC_utf8;
- SAVEFREEPV(exp);
- goto redo_first_pass;
- }
- DEBUG_PARSE_r({
- PerlIO_printf(Perl_debug_log,
- "Required size %"IVdf" nodes\n"
- "Starting second pass (creation)\n",
- (IV)RExC_size);
- RExC_lastnum=0;
- RExC_lastparse=NULL;
- });
- /* Small enough for pointer-storage convention?
- If extralen==0, this means that we will not need long jumps. */
- if (RExC_size >= 0x10000L && RExC_extralen)
- RExC_size += RExC_extralen;
- else
- RExC_extralen = 0;
- if (RExC_whilem_seen > 15)
- RExC_whilem_seen = 15;
-
- /* Allocate space and zero-initialize. Note, the two step process
- of zeroing when in debug mode, thus anything assigned has to
- happen after that */
- rx = (REGEXP*) newSV_type(SVt_REGEXP);
- r = (struct regexp*)SvANY(rx);
- Newxc(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode),
- char, regexp_internal);
- if ( r == NULL || ri == NULL )
- FAIL("Regexp out of space");
-#ifdef DEBUGGING
- /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */
- Zero(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode), char);
-#else
- /* bulk initialize base fields with 0. */
- Zero(ri, sizeof(regexp_internal), char);
-#endif
-
- /* non-zero initialization begins here */
- RXi_SET( r, ri );
- r->engine= RE_ENGINE_PTR;
- r->extflags = pm_flags;
- {
- bool has_p = ((r->extflags & RXf_PMf_KEEPCOPY) == RXf_PMf_KEEPCOPY);
- bool has_minus = ((r->extflags & RXf_PMf_STD_PMMOD) != RXf_PMf_STD_PMMOD);
- bool has_runon = ((RExC_seen & REG_SEEN_RUN_ON_COMMENT)==REG_SEEN_RUN_ON_COMMENT);
- U16 reganch = (U16)((r->extflags & RXf_PMf_STD_PMMOD)
- >> RXf_PMf_STD_PMMOD_SHIFT);
- const char *fptr = STD_PAT_MODS; /*"msix"*/
- char *p;
- const STRLEN wraplen = plen + has_minus + has_p + has_runon
- + (sizeof(STD_PAT_MODS) - 1)
- + (sizeof("(?:)") - 1);
-
- p = sv_grow(MUTABLE_SV(rx), wraplen + 1);
- SvCUR_set(rx, wraplen);
- SvPOK_on(rx);
- SvFLAGS(rx) |= SvUTF8(pattern);
- *p++='('; *p++='?';
- if (has_p)
- *p++ = KEEPCOPY_PAT_MOD; /*'p'*/
- {
- char *r = p + (sizeof(STD_PAT_MODS) - 1) + has_minus - 1;
- char *colon = r + 1;
- char ch;
-
- while((ch = *fptr++)) {
- if(reganch & 1)
- *p++ = ch;
- else
- *r-- = ch;
- reganch >>= 1;
- }
- if(has_minus) {
- *r = '-';
- p = colon;
- }
- }
-
- *p++ = ':';
- Copy(RExC_precomp, p, plen, char);
- assert ((RX_WRAPPED(rx) - p) < 16);
- r->pre_prefix = p - RX_WRAPPED(rx);
- p += plen;
- if (has_runon)
- *p++ = '\n';
- *p++ = ')';
- *p = 0;
- }
-
- r->intflags = 0;
- r->nparens = RExC_npar - 1; /* set early to validate backrefs */
-
- if (RExC_seen & REG_SEEN_RECURSE) {
- Newxz(RExC_open_parens, RExC_npar,regnode *);
- SAVEFREEPV(RExC_open_parens);
- Newxz(RExC_close_parens,RExC_npar,regnode *);
- SAVEFREEPV(RExC_close_parens);
- }
-
- /* Useful during FAIL. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- Newxz(ri->u.offsets, 2*RExC_size+1, U32); /* MJD 20001228 */
- DEBUG_OFFSETS_r(PerlIO_printf(Perl_debug_log,
- "%s %"UVuf" bytes for offset annotations.\n",
- ri->u.offsets ? "Got" : "Couldn't get",
- (UV)((2*RExC_size+1) * sizeof(U32))));
-#endif
- SetProgLen(ri,RExC_size);
- RExC_rx_sv = rx;
- RExC_rx = r;
- RExC_rxi = ri;
- REH_CALL_COMP_BEGIN_HOOK(pRExC_state->rx);
-
- /* Second pass: emit code. */
- RExC_flags = pm_flags; /* don't let top level (?i) bleed */
- RExC_parse = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_emit_start = ri->program;
- RExC_emit = ri->program;
- RExC_emit_bound = ri->program + RExC_size + 1;
-
- /* Store the count of eval-groups for security checks: */
- RExC_rx->seen_evals = RExC_seen_evals;
- REGC((U8)REG_MAGIC, (char*) RExC_emit++);
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- ReREFCNT_dec(rx);
- return(NULL);
- }
- /* XXXX To minimize changes to RE engine we always allocate
- 3-units-long substrs field. */
- Newx(r->substrs, 1, struct reg_substr_data);
- if (RExC_recurse_count) {
- Newxz(RExC_recurse,RExC_recurse_count,regnode *);
- SAVEFREEPV(RExC_recurse);
- }
-
-reStudy:
- r->minlen = minlen = sawplus = sawopen = 0;
- Zero(r->substrs, 1, struct reg_substr_data);
-
-#ifdef TRIE_STUDY_OPT
- if (!restudied) {
- StructCopy(&zero_scan_data, &data, scan_data_t);
- copyRExC_state = RExC_state;
- } else {
- U32 seen=RExC_seen;
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log,"Restudying\n"));
-
- RExC_state = copyRExC_state;
- if (seen & REG_TOP_LEVEL_BRANCHES)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
- else
- RExC_seen &= ~REG_TOP_LEVEL_BRANCHES;
- if (data.last_found) {
- SvREFCNT_dec(data.longest_fixed);
- SvREFCNT_dec(data.longest_float);
- SvREFCNT_dec(data.last_found);
- }
- StructCopy(&zero_scan_data, &data, scan_data_t);
- }
-#else
- StructCopy(&zero_scan_data, &data, scan_data_t);
-#endif
-
- /* Dig out information for optimizations. */
- r->extflags = RExC_flags; /* was pm_op */
- /*dmq: removed as part of de-PMOP: pm->op_pmflags = RExC_flags; */
-
- if (UTF)
- SvUTF8_on(rx); /* Unicode in it? */
- ri->regstclass = NULL;
- if (RExC_naughty >= 10) /* Probably an expensive pattern. */
- r->intflags |= PREGf_NAUGHTY;
- scan = ri->program + 1; /* First BRANCH. */
-
- /* testing for BRANCH here tells us whether there is "must appear"
- data in the pattern. If there is then we can use it for optimisations */
- if (!(RExC_seen & REG_TOP_LEVEL_BRANCHES)) { /* Only one top-level choice. */
- I32 fake;
- STRLEN longest_float_length, longest_fixed_length;
- struct regnode_charclass_class ch_class; /* pointed to by data */
- int stclass_flag;
- I32 last_close = 0; /* pointed to by data */
- regnode *first= scan;
- regnode *first_next= regnext(first);
-
- /*
- * Skip introductions and multiplicators >= 1
- * so that we can extract the 'meat' of the pattern that must
- * match in the large if() sequence following.
- * NOTE that EXACT is NOT covered here, as it is normally
- * picked up by the optimiser separately.
- *
- * This is unfortunate as the optimiser isnt handling lookahead
- * properly currently.
- *
- */
- while ((OP(first) == OPEN && (sawopen = 1)) ||
- /* An OR of *one* alternative - should not happen now. */
- (OP(first) == BRANCH && OP(first_next) != BRANCH) ||
- /* for now we can't handle lookbehind IFMATCH*/
- (OP(first) == IFMATCH && !first->flags) ||
- (OP(first) == PLUS) ||
- (OP(first) == MINMOD) ||
- /* An {n,m} with n>0 */
- (PL_regkind[OP(first)] == CURLY && ARG1(first) > 0) ||
- (OP(first) == NOTHING && PL_regkind[OP(first_next)] != END ))
- {
- /*
- * the only op that could be a regnode is PLUS, all the rest
- * will be regnode_1 or regnode_2.
- *
- */
- if (OP(first) == PLUS)
- sawplus = 1;
- else
- first += regarglen[OP(first)];
-
- first = NEXTOPER(first);
- first_next= regnext(first);
- }
-
- /* Starting-point info. */
- again:
- DEBUG_PEEP("first:",first,0);
- /* Ignore EXACT as we deal with it later. */
- if (PL_regkind[OP(first)] == EXACT) {
- if (OP(first) == EXACT)
- NOOP; /* Empty, get anchored substr later. */
- else if ((OP(first) == EXACTF || OP(first) == EXACTFL))
- ri->regstclass = first;
- }
-#ifdef TRIE_STCLASS
- else if (PL_regkind[OP(first)] == TRIE &&
- ((reg_trie_data *)ri->data->data[ ARG(first) ])->minlen>0)
- {
- regnode *trie_op;
- /* this can happen only on restudy */
- if ( OP(first) == TRIE ) {
- struct regnode_1 *trieop = (struct regnode_1 *)
- PerlMemShared_calloc(1, sizeof(struct regnode_1));
- StructCopy(first,trieop,struct regnode_1);
- trie_op=(regnode *)trieop;
- } else {
- struct regnode_charclass *trieop = (struct regnode_charclass *)
- PerlMemShared_calloc(1, sizeof(struct regnode_charclass));
- StructCopy(first,trieop,struct regnode_charclass);
- trie_op=(regnode *)trieop;
- }
- OP(trie_op)+=2;
- make_trie_failtable(pRExC_state, (regnode *)first, trie_op, 0);
- ri->regstclass = trie_op;
- }
-#endif
- else if (strchr((const char*)PL_simple,OP(first)))
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOUND ||
- PL_regkind[OP(first)] == NBOUND)
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOL) {
- r->extflags |= (OP(first) == MBOL
- ? RXf_ANCH_MBOL
- : (OP(first) == SBOL
- ? RXf_ANCH_SBOL
- : RXf_ANCH_BOL));
- first = NEXTOPER(first);
- goto again;
- }
- else if (OP(first) == GPOS) {
- r->extflags |= RXf_ANCH_GPOS;
- first = NEXTOPER(first);
- goto again;
- }
- else if ((!sawopen || !RExC_sawback) &&
- (OP(first) == STAR &&
- PL_regkind[OP(NEXTOPER(first))] == REG_ANY) &&
- !(r->extflags & RXf_ANCH) && !(RExC_seen & REG_SEEN_EVAL))
- {
- /* turn .* into ^.* with an implied $*=1 */
- const int type =
- (OP(NEXTOPER(first)) == REG_ANY)
- ? RXf_ANCH_MBOL
- : RXf_ANCH_SBOL;
- r->extflags |= type;
- r->intflags |= PREGf_IMPLICIT;
- first = NEXTOPER(first);
- goto again;
- }
- if (sawplus && (!sawopen || !RExC_sawback)
- && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */
- /* x+ must match at the 1st pos of run of x's */
- r->intflags |= PREGf_SKIP;
-
- /* Scan is after the zeroth branch, first is atomic matcher. */
-#ifdef TRIE_STUDY_OPT
- DEBUG_PARSE_r(
- if (!restudied)
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#else
- DEBUG_PARSE_r(
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#endif
-
-
- /*
- * If there's something expensive in the r.e., find the
- * longest literal string that must appear and make it the
- * regmust. Resolve ties in favor of later strings, since
- * the regstart check works with the beginning of the r.e.
- * and avoiding duplication strengthens checking. Not a
- * strong reason, but sufficient in the absence of others.
- * [Now we resolve ties in favor of the earlier string if
- * it happens that c_offset_min has been invalidated, since the
- * earlier string may buy us something the later one won't.]
- */
-
- data.longest_fixed = newSVpvs("");
- data.longest_float = newSVpvs("");
- data.last_found = newSVpvs("");
- data.longest = &(data.longest_fixed);
- first = scan;
- if (!ri->regstclass) {
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- stclass_flag = SCF_DO_STCLASS_AND;
- } else /* XXXX Check for BOUND? */
- stclass_flag = 0;
- data.last_closep = &last_close;
-
- minlen = study_chunk(pRExC_state, &first, &minlen, &fake, scan + RExC_size, /* Up to end */
- &data, -1, NULL, NULL,
- SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag,0);
-
-
- CHECK_RESTUDY_GOTO;
-
-
- if ( RExC_npar == 1 && data.longest == &(data.longest_fixed)
- && data.last_start_min == 0 && data.last_end > 0
- && !RExC_seen_zerolen
- && !(RExC_seen & REG_SEEN_VERBARG)
- && (!(RExC_seen & REG_SEEN_GPOS) || (r->extflags & RXf_ANCH_GPOS)))
- r->extflags |= RXf_CHECK_ALL;
- scan_commit(pRExC_state, &data,&minlen,0);
- SvREFCNT_dec(data.last_found);
-
- /* Note that code very similar to this but for anchored string
- follows immediately below, changes may need to be made to both.
- Be careful.
- */
- longest_float_length = CHR_SVLEN(data.longest_float);
- if (longest_float_length
- || (data.flags & SF_FL_BEFORE_EOL
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */
- && data.offset_fixed == data.offset_float_min
- && SvCUR(data.longest_fixed) == SvCUR(data.longest_float))
- goto remove_float; /* As in (a)+. */
-
- /* copy the information about the longest float from the reg_scan_data
- over to the program. */
- if (SvUTF8(data.longest_float)) {
- r->float_utf8 = data.longest_float;
- r->float_substr = NULL;
- } else {
- r->float_substr = data.longest_float;
- r->float_utf8 = NULL;
- }
- /* float_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_float ? *(data.minlen_float)
- : (I32)longest_float_length;
- r->float_end_shift = ml - data.offset_float_min
- - longest_float_length + (SvTAIL(data.longest_float) != 0)
- + data.lookbehind_float;
- r->float_min_offset = data.offset_float_min - data.lookbehind_float;
- r->float_max_offset = data.offset_float_max;
- if (data.offset_float_max < I32_MAX) /* Don't offset infinity */
- r->float_max_offset -= data.lookbehind_float;
-
- t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_float, t ? FBMcf_TAIL : 0);
- }
- else {
- remove_float:
- r->float_substr = r->float_utf8 = NULL;
- SvREFCNT_dec(data.longest_float);
- longest_float_length = 0;
- }
-
- /* Note that code very similar to this but for floating string
- is immediately above, changes may need to be made to both.
- Be careful.
- */
- longest_fixed_length = CHR_SVLEN(data.longest_fixed);
- if (longest_fixed_length
- || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- /* copy the information about the longest fixed
- from the reg_scan_data over to the program. */
- if (SvUTF8(data.longest_fixed)) {
- r->anchored_utf8 = data.longest_fixed;
- r->anchored_substr = NULL;
- } else {
- r->anchored_substr = data.longest_fixed;
- r->anchored_utf8 = NULL;
- }
- /* fixed_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_fixed ? *(data.minlen_fixed)
- : (I32)longest_fixed_length;
- r->anchored_end_shift = ml - data.offset_fixed
- - longest_fixed_length + (SvTAIL(data.longest_fixed) != 0)
- + data.lookbehind_fixed;
- r->anchored_offset = data.offset_fixed - data.lookbehind_fixed;
-
- t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_fixed, t ? FBMcf_TAIL : 0);
- }
- else {
- r->anchored_substr = r->anchored_utf8 = NULL;
- SvREFCNT_dec(data.longest_fixed);
- longest_fixed_length = 0;
- }
- if (ri->regstclass
- && (OP(ri->regstclass) == REG_ANY || OP(ri->regstclass) == SANY))
- ri->regstclass = NULL;
- if ((!(r->anchored_substr || r->anchored_utf8) || r->anchored_offset)
- && stclass_flag
- && !(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV *sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
-
- /* A temporary algorithm prefers floated substr to fixed one to dig more info. */
- if (longest_fixed_length > longest_float_length) {
- r->check_end_shift = r->anchored_end_shift;
- r->check_substr = r->anchored_substr;
- r->check_utf8 = r->anchored_utf8;
- r->check_offset_min = r->check_offset_max = r->anchored_offset;
- if (r->extflags & RXf_ANCH_SINGLE)
- r->extflags |= RXf_NOSCAN;
- }
- else {
- r->check_end_shift = r->float_end_shift;
- r->check_substr = r->float_substr;
- r->check_utf8 = r->float_utf8;
- r->check_offset_min = r->float_min_offset;
- r->check_offset_max = r->float_max_offset;
- }
- /* XXXX Currently intuiting is not compatible with ANCH_GPOS.
- This should be changed ASAP! */
- if ((r->check_substr || r->check_utf8) && !(r->extflags & RXf_ANCH_GPOS)) {
- r->extflags |= RXf_USE_INTUIT;
- if (SvTAIL(r->check_substr ? r->check_substr : r->check_utf8))
- r->extflags |= RXf_INTUIT_TAIL;
- }
- /* XXX Unneeded? dmq (shouldn't as this is handled elsewhere)
- if ( (STRLEN)minlen < longest_float_length )
- minlen= longest_float_length;
- if ( (STRLEN)minlen < longest_fixed_length )
- minlen= longest_fixed_length;
- */
- }
- else {
- /* Several toplevels. Best we can is to set minlen. */
- I32 fake;
- struct regnode_charclass_class ch_class;
- I32 last_close = 0;
-
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "\nMulti Top Level\n"));
-
- scan = ri->program + 1;
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- data.last_closep = &last_close;
-
-
- minlen = study_chunk(pRExC_state, &scan, &minlen, &fake, scan + RExC_size,
- &data, -1, NULL, NULL, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS,0);
-
- CHECK_RESTUDY_GOTO;
-
- r->check_substr = r->check_utf8 = r->anchored_substr = r->anchored_utf8
- = r->float_substr = r->float_utf8 = NULL;
- if (!(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV* sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
- }
-
- /* Guard against an embedded (?=) or (?<=) with a longer minlen than
- the "real" pattern. */
- DEBUG_OPTIMISE_r({
- PerlIO_printf(Perl_debug_log,"minlen: %"IVdf" r->minlen:%"IVdf"\n",
- (IV)minlen, (IV)r->minlen);
- });
- r->minlenret = minlen;
- if (r->minlen < minlen)
- r->minlen = minlen;
-
- if (RExC_seen & REG_SEEN_GPOS)
- r->extflags |= RXf_GPOS_SEEN;
- if (RExC_seen & REG_SEEN_LOOKBEHIND)
- r->extflags |= RXf_LOOKBEHIND_SEEN;
- if (RExC_seen & REG_SEEN_EVAL)
- r->extflags |= RXf_EVAL_SEEN;
- if (RExC_seen & REG_SEEN_CANY)
- r->extflags |= RXf_CANY_SEEN;
- if (RExC_seen & REG_SEEN_VERBARG)
- r->intflags |= PREGf_VERBARG_SEEN;
- if (RExC_seen & REG_SEEN_CUTGROUP)
- r->intflags |= PREGf_CUTGROUP_SEEN;
- if (RExC_paren_names)
- RXp_PAREN_NAMES(r) = MUTABLE_HV(SvREFCNT_inc(RExC_paren_names));
- else
- RXp_PAREN_NAMES(r) = NULL;
-
-#ifdef STUPID_PATTERN_CHECKS
- if (RX_PRELEN(rx) == 0)
- r->extflags |= RXf_NULL;
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else if (RX_PRELEN(rx) == 3 && memEQ("\\s+", RX_PRECOMP(rx), 3))
- r->extflags |= RXf_WHITE;
- else if (RX_PRELEN(rx) == 1 && RXp_PRECOMP(rx)[0] == '^')
- r->extflags |= RXf_START_ONLY;
-#else
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else {
- regnode *first = ri->program + 1;
- U8 fop = OP(first);
- U8 nop = OP(NEXTOPER(first));
-
- if (PL_regkind[fop] == NOTHING && nop == END)
- r->extflags |= RXf_NULL;
- else if (PL_regkind[fop] == BOL && nop == END)
- r->extflags |= RXf_START_ONLY;
- else if (fop == PLUS && nop ==SPACE && OP(regnext(first))==END)
- r->extflags |= RXf_WHITE;
- }
-#endif
-#ifdef DEBUGGING
- if (RExC_paren_names) {
- ri->name_list_idx = add_data( pRExC_state, 1, "p" );
- ri->data->data[ri->name_list_idx] = (void*)SvREFCNT_inc(RExC_paren_name_list);
- } else
-#endif
- ri->name_list_idx = 0;
-
- if (RExC_recurse_count) {
- for ( ; RExC_recurse_count ; RExC_recurse_count-- ) {
- const regnode *scan = RExC_recurse[RExC_recurse_count-1];
- ARG2L_SET( scan, RExC_open_parens[ARG(scan)-1] - scan );
- }
- }
- Newxz(r->offs, RExC_npar, regexp_paren_pair);
- /* assume we don't need to swap parens around before we match */
-
- DEBUG_DUMP_r({
- PerlIO_printf(Perl_debug_log,"Final program:\n");
- regdump(r);
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_OFFSETS_r(if (ri->u.offsets) {
- const U32 len = ri->u.offsets[0];
- U32 i;
- GET_RE_DEBUG_FLAGS_DECL;
- PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)ri->u.offsets[0]);
- for (i = 1; i <= len; i++) {
- if (ri->u.offsets[i*2-1] || ri->u.offsets[i*2])
- PerlIO_printf(Perl_debug_log, "%"UVuf":%"UVuf"[%"UVuf"] ",
- (UV)i, (UV)ri->u.offsets[i*2-1], (UV)ri->u.offsets[i*2]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
-#endif
- return rx;
-}
-
-#undef RE_ENGINE_PTR
-
-
-SV*
-Perl_reg_named_buff(pTHX_ REGEXP * const rx, SV * const key, SV * const value,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF;
-
- PERL_UNUSED_ARG(value);
-
- if (flags & RXapif_FETCH) {
- return reg_named_buff_fetch(rx, key, flags);
- } else if (flags & (RXapif_STORE | RXapif_DELETE | RXapif_CLEAR)) {
- Perl_croak(aTHX_ "%s", PL_no_modify);
- return NULL;
- } else if (flags & RXapif_EXISTS) {
- return reg_named_buff_exists(rx, key, flags)
- ? &PL_sv_yes
- : &PL_sv_no;
- } else if (flags & RXapif_REGNAMES) {
- return reg_named_buff_all(rx, flags);
- } else if (flags & (RXapif_SCALAR | RXapif_REGNAMES_COUNT)) {
- return reg_named_buff_scalar(rx, flags);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_iter(pTHX_ REGEXP * const rx, const SV * const lastkey,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ITER;
- PERL_UNUSED_ARG(lastkey);
-
- if (flags & RXapif_FIRSTKEY)
- return reg_named_buff_firstkey(rx, flags);
- else if (flags & RXapif_NEXTKEY)
- return reg_named_buff_nextkey(rx, flags);
- else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_iter", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_fetch(pTHX_ REGEXP * const r, SV * const namesv,
- const U32 flags)
-{
- AV *retarray = NULL;
- SV *ret;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FETCH;
-
- if (flags & RXapif_ALL)
- retarray=newAV();
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HE *he_str = hv_fetch_ent( RXp_PAREN_NAMES(rx), namesv, 0, 0 );
- if (he_str) {
- IV i;
- SV* sv_dat=HeVAL(he_str);
- I32 *nums=(I32*)SvPVX(sv_dat);
- for ( i=0; i<SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->nparens) >= nums[i]
- && rx->offs[nums[i]].start != -1
- && rx->offs[nums[i]].end != -1)
- {
- ret = newSVpvs("");
- CALLREG_NUMBUF_FETCH(r,nums[i],ret);
- if (!retarray)
- return ret;
- } else {
- ret = newSVsv(&PL_sv_undef);
- }
- if (retarray)
- av_push(retarray, ret);
- }
- if (retarray)
- return newRV_noinc(MUTABLE_SV(retarray));
- }
- }
- return NULL;
-}
-
-bool
-Perl_reg_named_buff_exists(pTHX_ REGEXP * const r, SV * const key,
- const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_EXISTS;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & RXapif_ALL) {
- return hv_exists_ent(RXp_PAREN_NAMES(rx), key, 0);
- } else {
- SV *sv = CALLREG_NAMED_BUFF_FETCH(r, key, flags);
- if (sv) {
- SvREFCNT_dec(sv);
- return TRUE;
- } else {
- return FALSE;
- }
- }
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_firstkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FIRSTKEY;
-
- if ( rx && RXp_PAREN_NAMES(rx) ) {
- (void)hv_iterinit(RXp_PAREN_NAMES(rx));
-
- return CALLREG_NAMED_BUFF_NEXTKEY(r, NULL, flags & ~RXapif_FIRSTKEY);
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_nextkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_NEXTKEY;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv = RXp_PAREN_NAMES(rx);
- HE *temphe;
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- return newSVhek(HeKEY_hek(temphe));
- }
- }
- }
- return NULL;
-}
-
-SV*
-Perl_reg_named_buff_scalar(pTHX_ REGEXP * const r, const U32 flags)
-{
- SV *ret;
- AV *av;
- I32 length;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_SCALAR;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & (RXapif_ALL | RXapif_REGNAMES_COUNT)) {
- return newSViv(HvTOTALKEYS(RXp_PAREN_NAMES(rx)));
- } else if (flags & RXapif_ONE) {
- ret = CALLREG_NAMED_BUFF_ALL(r, (flags | RXapif_REGNAMES));
- av = MUTABLE_AV(SvRV(ret));
- length = av_len(av);
- SvREFCNT_dec(ret);
- return newSViv(length + 1);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_scalar", (int)flags);
- return NULL;
- }
- }
- return &PL_sv_undef;
-}
-
-SV*
-Perl_reg_named_buff_all(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- AV *av = newAV();
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ALL;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv= RXp_PAREN_NAMES(rx);
- HE *temphe;
- (void)hv_iterinit(hv);
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- av_push(av, newSVhek(HeKEY_hek(temphe)));
- }
- }
- }
-
- return newRV_noinc(MUTABLE_SV(av));
-}
-
-void
-Perl_reg_numbered_buff_fetch(pTHX_ REGEXP * const r, const I32 paren,
- SV * const sv)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- char *s = NULL;
- I32 i = 0;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_FETCH;
-
- if (!rx->subbeg) {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- else
- if (paren == RX_BUFF_IDX_PREMATCH && rx->offs[0].start != -1) {
- /* $` */
- i = rx->offs[0].start;
- s = rx->subbeg;
- }
- else
- if (paren == RX_BUFF_IDX_POSTMATCH && rx->offs[0].end != -1) {
- /* $' */
- s = rx->subbeg + rx->offs[0].end;
- i = rx->sublen - rx->offs[0].end;
- }
- else
- if ( 0 <= paren && paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- /* $& $1 ... */
- i = t1 - s1;
- s = rx->subbeg + s1;
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- assert(rx->sublen >= (s - rx->subbeg) + i );
- if (i >= 0) {
- const int oldtainted = PL_tainted;
- TAINT_NOT;
- sv_setpvn(sv, s, i);
- PL_tainted = oldtainted;
- if ( (rx->extflags & RXf_CANY_SEEN)
- ? (RXp_MATCH_UTF8(rx)
- && (!i || is_utf8_string((U8*)s, i)))
- : (RXp_MATCH_UTF8(rx)) )
- {
- SvUTF8_on(sv);
- }
- else
- SvUTF8_off(sv);
- if (PL_tainting) {
- if (RXp_MATCH_TAINTED(rx)) {
- if (SvTYPE(sv) >= SVt_PVMG) {
- MAGIC* const mg = SvMAGIC(sv);
- MAGIC* mgt;
- PL_tainted = 1;
- SvMAGIC_set(sv, mg->mg_moremagic);
- SvTAINT(sv);
- if ((mgt = SvMAGIC(sv))) {
- mg->mg_moremagic = mgt;
- SvMAGIC_set(sv, mg);
- }
- } else {
- PL_tainted = 1;
- SvTAINT(sv);
- }
- } else
- SvTAINTED_off(sv);
- }
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
-}
-
-void
-Perl_reg_numbered_buff_store(pTHX_ REGEXP * const rx, const I32 paren,
- SV const * const value)
-{
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_STORE;
-
- PERL_UNUSED_ARG(rx);
- PERL_UNUSED_ARG(paren);
- PERL_UNUSED_ARG(value);
-
- if (!PL_localizing)
- Perl_croak(aTHX_ "%s", PL_no_modify);
-}
-
-I32
-Perl_reg_numbered_buff_length(pTHX_ REGEXP * const r, const SV * const sv,
- const I32 paren)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- I32 i;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_LENGTH;
-
- /* Some of this code was originally in C<Perl_magic_len> in F<mg.c> */
- switch (paren) {
- /* $` / ${^PREMATCH} */
- case RX_BUFF_IDX_PREMATCH:
- if (rx->offs[0].start != -1) {
- i = rx->offs[0].start;
- if (i > 0) {
- s1 = 0;
- t1 = i;
- goto getlen;
- }
- }
- return 0;
- /* $' / ${^POSTMATCH} */
- case RX_BUFF_IDX_POSTMATCH:
- if (rx->offs[0].end != -1) {
- i = rx->sublen - rx->offs[0].end;
- if (i > 0) {
- s1 = rx->offs[0].end;
- t1 = rx->sublen;
- goto getlen;
- }
- }
- return 0;
- /* $& / ${^MATCH}, $1, $2, ... */
- default:
- if (paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- i = t1 - s1;
- goto getlen;
- } else {
- if (ckWARN(WARN_UNINITIALIZED))
- report_uninit((const SV *)sv);
- return 0;
- }
- }
- getlen:
- if (i > 0 && RXp_MATCH_UTF8(rx)) {
- const char * const s = rx->subbeg + s1;
- const U8 *ep;
- STRLEN el;
-
- i = t1 - s1;
- if (is_utf8_string_loclen((U8*)s, i, &ep, &el))
- i = el;
- }
- return i;
-}
-
-SV*
-Perl_reg_qr_package(pTHX_ REGEXP * const rx)
-{
- PERL_ARGS_ASSERT_REG_QR_PACKAGE;
- PERL_UNUSED_ARG(rx);
- if (0)
- return NULL;
- else
- return newSVpvs("Regexp");
-}
-
-/* Scans the name of a named buffer from the pattern.
- * If flags is REG_RSN_RETURN_NULL returns null.
- * If flags is REG_RSN_RETURN_NAME returns an SV* containing the name
- * If flags is REG_RSN_RETURN_DATA returns the data SV* corresponding
- * to the parsed name as looked up in the RExC_paren_names hash.
- * If there is an error throws a vFAIL().. type exception.
- */
-
-#define REG_RSN_RETURN_NULL 0
-#define REG_RSN_RETURN_NAME 1
-#define REG_RSN_RETURN_DATA 2
-
-STATIC SV*
-S_reg_scan_name(pTHX_ RExC_state_t *pRExC_state, U32 flags)
-{
- char *name_start = RExC_parse;
-
- PERL_ARGS_ASSERT_REG_SCAN_NAME;
-
- if (isIDFIRST_lazy_if(RExC_parse, UTF)) {
- /* skip IDFIRST by using do...while */
- if (UTF)
- do {
- RExC_parse += UTF8SKIP(RExC_parse);
- } while (isALNUM_utf8((U8*)RExC_parse));
- else
- do {
- RExC_parse++;
- } while (isALNUM(*RExC_parse));
- }
-
- if ( flags ) {
- SV* sv_name
- = newSVpvn_flags(name_start, (int)(RExC_parse - name_start),
- SVs_TEMP | (UTF ? SVf_UTF8 : 0));
- if ( flags == REG_RSN_RETURN_NAME)
- return sv_name;
- else if (flags==REG_RSN_RETURN_DATA) {
- HE *he_str = NULL;
- SV *sv_dat = NULL;
- if ( ! sv_name ) /* should not happen*/
- Perl_croak(aTHX_ "panic: no svname in reg_scan_name");
- if (RExC_paren_names)
- he_str = hv_fetch_ent( RExC_paren_names, sv_name, 0, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat )
- vFAIL("Reference to nonexistent named group");
- return sv_dat;
- }
- else {
- Perl_croak(aTHX_ "panic: bad flag in reg_scan_name");
- }
- /* NOT REACHED */
- }
- return NULL;
-}
-
-#define DEBUG_PARSE_MSG(funcname) DEBUG_PARSE_r({ \
- int rem=(int)(RExC_end - RExC_parse); \
- int cut; \
- int num; \
- int iscut=0; \
- if (rem>10) { \
- rem=10; \
- iscut=1; \
- } \
- cut=10-rem; \
- if (RExC_lastparse!=RExC_parse) \
- PerlIO_printf(Perl_debug_log," >%.*s%-*s", \
- rem, RExC_parse, \
- cut + 4, \
- iscut ? "..." : "<" \
- ); \
- else \
- PerlIO_printf(Perl_debug_log,"%16s",""); \
- \
- if (SIZE_ONLY) \
- num = RExC_size + 1; \
- else \
- num=REG_NODE_NUM(RExC_emit); \
- if (RExC_lastnum!=num) \
- PerlIO_printf(Perl_debug_log,"|%4d",num); \
- else \
- PerlIO_printf(Perl_debug_log,"|%4s",""); \
- PerlIO_printf(Perl_debug_log,"|%*s%-4s", \
- (int)((depth*2)), "", \
- (funcname) \
- ); \
- RExC_lastnum=num; \
- RExC_lastparse=RExC_parse; \
-})
-
-
-
-#define DEBUG_PARSE(funcname) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,"%4s","\n"); \
-})
-#define DEBUG_PARSE_FMT(funcname,fmt,args) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,fmt "\n",args); \
-})
-/*
- - reg - regular expression, i.e. main body or parenthesized thing
- *
- * Caller must absorb opening parenthesis.
- *
- * Combining parenthesis handling with the base level of regular expression
- * is a trifle forced, but the need to tie the tails of the branches to what
- * follows makes it hard to avoid.
- */
-#define REGTAIL(x,y,z) regtail((x),(y),(z),depth+1)
-#ifdef DEBUGGING
-#define REGTAIL_STUDY(x,y,z) regtail_study((x),(y),(z),depth+1)
-#else
-#define REGTAIL_STUDY(x,y,z) regtail((x),(y),(z),depth+1)
-#endif
-
-STATIC regnode *
-S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth)
- /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */
-{
- dVAR;
- register regnode *ret; /* Will be the head of the group. */
- register regnode *br;
- register regnode *lastbr;
- register regnode *ender = NULL;
- register I32 parno = 0;
- I32 flags;
- U32 oregflags = RExC_flags;
- bool have_branch = 0;
- bool is_open = 0;
- I32 freeze_paren = 0;
- I32 after_freeze = 0;
-
- /* for (?g), (?gc), and (?o) warnings; warning
- about (?c) will warn about (?g) -- japhy */
-
-#define WASTED_O 0x01
-#define WASTED_G 0x02
-#define WASTED_C 0x04
-#define WASTED_GC (0x02|0x04)
- I32 wastedflags = 0x00;
-
- char * parse_start = RExC_parse; /* MJD */
- char * const oregcomp_parse = RExC_parse;
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG;
- DEBUG_PARSE("reg ");
-
- *flagp = 0; /* Tentatively. */
-
-
- /* Make an OPEN node, if parenthesized. */
- if (paren) {
- if ( *RExC_parse == '*') { /* (*VERB:ARG) */
- char *start_verb = RExC_parse;
- STRLEN verb_len = 0;
- char *start_arg = NULL;
- unsigned char op = 0;
- int argok = 1;
- int internal_argval = 0; /* internal_argval is only useful if !argok */
- while ( *RExC_parse && *RExC_parse != ')' ) {
- if ( *RExC_parse == ':' ) {
- start_arg = RExC_parse + 1;
- break;
- }
- RExC_parse++;
- }
- ++start_verb;
- verb_len = RExC_parse - start_verb;
- if ( start_arg ) {
- RExC_parse++;
- while ( *RExC_parse && *RExC_parse != ')' )
- RExC_parse++;
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern argument");
- if ( RExC_parse == start_arg )
- start_arg = NULL;
- } else {
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern");
- }
-
- switch ( *start_verb ) {
- case 'A': /* (*ACCEPT) */
- if ( memEQs(start_verb,verb_len,"ACCEPT") ) {
- op = ACCEPT;
- internal_argval = RExC_nestroot;
- }
- break;
- case 'C': /* (*COMMIT) */
- if ( memEQs(start_verb,verb_len,"COMMIT") )
- op = COMMIT;
- break;
- case 'F': /* (*FAIL) */
- if ( verb_len==1 || memEQs(start_verb,verb_len,"FAIL") ) {
- op = OPFAIL;
- argok = 0;
- }
- break;
- case ':': /* (*:NAME) */
- case 'M': /* (*MARK:NAME) */
- if ( verb_len==0 || memEQs(start_verb,verb_len,"MARK") ) {
- op = MARKPOINT;
- argok = -1;
- }
- break;
- case 'P': /* (*PRUNE) */
- if ( memEQs(start_verb,verb_len,"PRUNE") )
- op = PRUNE;
- break;
- case 'S': /* (*SKIP) */
- if ( memEQs(start_verb,verb_len,"SKIP") )
- op = SKIP;
- break;
- case 'T': /* (*THEN) */
- /* [19:06] <TimToady> :: is then */
- if ( memEQs(start_verb,verb_len,"THEN") ) {
- op = CUTGROUP;
- RExC_seen |= REG_SEEN_CUTGROUP;
- }
- break;
- }
- if ( ! op ) {
- RExC_parse++;
- vFAIL3("Unknown verb pattern '%.*s'",
- verb_len, start_verb);
- }
- if ( argok ) {
- if ( start_arg && internal_argval ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else if ( argok < 0 && !start_arg ) {
- vFAIL3("Verb pattern '%.*s' has a mandatory argument",
- verb_len, start_verb);
- } else {
- ret = reganode(pRExC_state, op, internal_argval);
- if ( ! internal_argval && ! SIZE_ONLY ) {
- if (start_arg) {
- SV *sv = newSVpvn( start_arg, RExC_parse - start_arg);
- ARG(ret) = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[ARG(ret)]=(void*)sv;
- ret->flags = 0;
- } else {
- ret->flags = 1;
- }
- }
- }
- if (!internal_argval)
- RExC_seen |= REG_SEEN_VERBARG;
- } else if ( start_arg ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else {
- ret = reg_node(pRExC_state, op);
- }
- nextchar(pRExC_state);
- return ret;
- } else
- if (*RExC_parse == '?') { /* (?...) */
- bool is_logical = 0;
- const char * const seqstart = RExC_parse;
-
- RExC_parse++;
- paren = *RExC_parse++;
- ret = NULL; /* For look-ahead/behind. */
- switch (paren) {
-
- case 'P': /* (?P...) variants for those used to PCRE/Python */
- paren = *RExC_parse++;
- if ( paren == '<') /* (?P<...>) named capture */
- goto named_capture;
- else if (paren == '>') { /* (?P>name) named recursion */
- goto named_recursion;
- }
- else if (paren == '=') { /* (?P=...) named backref */
- /* this pretty much dupes the code for \k<NAME> in regatom(), if
- you change this make sure you change that */
- char* name_start = RExC_parse;
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ')')
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
-
- nextchar(pRExC_state);
- return ret;
- }
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- case '<': /* (?<...) */
- if (*RExC_parse == '!')
- paren = ',';
- else if (*RExC_parse != '=')
- named_capture:
- { /* (?<...>) */
- char *name_start;
- SV *svname;
- paren= '>';
- case '\'': /* (?'...') */
- name_start= RExC_parse;
- svname = reg_scan_name(pRExC_state,
- SIZE_ONLY ? /* reverse test from the others */
- REG_RSN_RETURN_NAME :
- REG_RSN_RETURN_NULL);
- if (RExC_parse == name_start) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- if (*RExC_parse != paren)
- vFAIL2("Sequence (?%c... not terminated",
- paren=='>' ? '<' : paren);
- if (SIZE_ONLY) {
- HE *he_str;
- SV *sv_dat = NULL;
- if (!svname) /* shouldnt happen */
- Perl_croak(aTHX_
- "panic: reg_scan_name returned NULL");
- if (!RExC_paren_names) {
- RExC_paren_names= newHV();
- sv_2mortal(MUTABLE_SV(RExC_paren_names));
-#ifdef DEBUGGING
- RExC_paren_name_list= newAV();
- sv_2mortal(MUTABLE_SV(RExC_paren_name_list));
-#endif
- }
- he_str = hv_fetch_ent( RExC_paren_names, svname, 1, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat ) {
- /* croak baby croak */
- Perl_croak(aTHX_
- "panic: paren_name hash element allocation failed");
- } else if ( SvPOK(sv_dat) ) {
- /* (?|...) can mean we have dupes so scan to check
- its already been stored. Maybe a flag indicating
- we are inside such a construct would be useful,
- but the arrays are likely to be quite small, so
- for now we punt -- dmq */
- IV count = SvIV(sv_dat);
- I32 *pv = (I32*)SvPVX(sv_dat);
- IV i;
- for ( i = 0 ; i < count ; i++ ) {
- if ( pv[i] == RExC_npar ) {
- count = 0;
- break;
- }
- }
- if ( count ) {
- pv = (I32*)SvGROW(sv_dat, SvCUR(sv_dat) + sizeof(I32)+1);
- SvCUR_set(sv_dat, SvCUR(sv_dat) + sizeof(I32));
- pv[count] = RExC_npar;
- SvIV_set(sv_dat, SvIVX(sv_dat) + 1);
- }
- } else {
- (void)SvUPGRADE(sv_dat,SVt_PVNV);
- sv_setpvn(sv_dat, (char *)&(RExC_npar), sizeof(I32));
- SvIOK_on(sv_dat);
- SvIV_set(sv_dat, 1);
- }
-#ifdef DEBUGGING
- if (!av_store(RExC_paren_name_list, RExC_npar, SvREFCNT_inc(svname)))
- SvREFCNT_dec(svname);
-#endif
-
- /*sv_dump(sv_dat);*/
- }
- nextchar(pRExC_state);
- paren = 1;
- goto capturing_parens;
- }
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- RExC_parse++;
- case '=': /* (?=...) */
- RExC_seen_zerolen++;
- break;
- case '!': /* (?!...) */
- RExC_seen_zerolen++;
- if (*RExC_parse == ')') {
- ret=reg_node(pRExC_state, OPFAIL);
- nextchar(pRExC_state);
- return ret;
- }
- break;
- case '|': /* (?|...) */
- /* branch reset, behave like a (?:...) except that
- buffers in alternations share the same numbers */
- paren = ':';
- after_freeze = freeze_paren = RExC_npar;
- break;
- case ':': /* (?:...) */
- case '>': /* (?>...) */
- break;
- case '$': /* (?$...) */
- case '@': /* (?@...) */
- vFAIL2("Sequence (?%c...) not implemented", (int)paren);
- break;
- case '#': /* (?#...) */
- while (*RExC_parse && *RExC_parse != ')')
- RExC_parse++;
- if (*RExC_parse != ')')
- FAIL("Sequence (?#... not terminated");
- nextchar(pRExC_state);
- *flagp = TRYAGAIN;
- return NULL;
- case '0' : /* (?0) */
- case 'R' : /* (?R) */
- if (*RExC_parse != ')')
- FAIL("Sequence (?R) not terminated");
- ret = reg_node(pRExC_state, GOSTART);
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- /*notreached*/
- { /* named and numeric backreferences */
- I32 num;
- case '&': /* (?&NAME) */
- parse_start = RExC_parse - 1;
- named_recursion:
- {
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- num = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- goto gen_recurse_regop;
- /* NOT REACHED */
- case '+':
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse++;
- vFAIL("Illegal pattern");
- }
- goto parse_recursion;
- /* NOT REACHED*/
- case '-': /* (?-1) */
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse--; /* rewind to let it be handled later */
- goto parse_flags;
- }
- /*FALLTHROUGH */
- case '1': case '2': case '3': case '4': /* (?1) */
- case '5': case '6': case '7': case '8': case '9':
- RExC_parse--;
- parse_recursion:
- num = atoi(RExC_parse);
- parse_start = RExC_parse - 1; /* MJD */
- if (*RExC_parse == '-')
- RExC_parse++;
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (*RExC_parse!=')')
- vFAIL("Expecting close bracket");
-
- gen_recurse_regop:
- if ( paren == '-' ) {
- /*
- Diagram of capture buffer numbering.
- Top line is the normal capture buffer numbers
- Botton line is the negative indexing as from
- the X (the (?-2))
-
- + 1 2 3 4 5 X 6 7
- /(a(x)y)(a(b(c(?-2)d)e)f)(g(h))/
- - 5 4 3 2 1 X x x
-
- */
- num = RExC_npar + num;
- if (num < 1) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- } else if ( paren == '+' ) {
- num = RExC_npar + num - 1;
- }
-
- ret = reganode(pRExC_state, GOSUB, num);
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- ARG2L_SET( ret, RExC_recurse_count++);
- RExC_emit++;
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Recurse #%"UVuf" to %"IVdf"\n", (UV)ARG(ret), (IV)ARG2L(ret)));
- } else {
- RExC_size++;
- }
- RExC_seen |= REG_SEEN_RECURSE;
- Set_Node_Length(ret, 1 + regarglen[OP(ret)]); /* MJD */
- Set_Node_Offset(ret, parse_start); /* MJD */
-
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- } /* named and numeric backreferences */
- /* NOT REACHED */
-
- case '?': /* (??...) */
- is_logical = 1;
- if (*RExC_parse != '{') {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- *flagp |= POSTPONED;
- paren = *RExC_parse++;
- /* FALL THROUGH */
- case '{': /* (?{...}) */
- {
- I32 count = 1;
- U32 n = 0;
- char c;
- char *s = RExC_parse;
-
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_EVAL;
- while (count && (c = *RExC_parse)) {
- if (c == '\\') {
- if (RExC_parse[1])
- RExC_parse++;
- }
- else if (c == '{')
- count++;
- else if (c == '}')
- count--;
- RExC_parse++;
- }
- if (*RExC_parse != ')') {
- RExC_parse = s;
- vFAIL("Sequence (?{...}) not terminated or not {}-balanced");
- }
- if (!SIZE_ONLY) {
- PAD *pad;
- OP_4tree *sop, *rop;
- SV * const sv = newSVpvn(s, RExC_parse - 1 - s);
-
- ENTER;
- Perl_save_re_context(aTHX);
- rop = sv_compile_2op(sv, &sop, "re", &pad);
- sop->op_private |= OPpREFCOUNTED;
- /* re_dup will OpREFCNT_inc */
- OpREFCNT_set(sop, 1);
- LEAVE;
-
- n = add_data(pRExC_state, 3, "nop");
- RExC_rxi->data->data[n] = (void*)rop;
- RExC_rxi->data->data[n+1] = (void*)sop;
- RExC_rxi->data->data[n+2] = (void*)pad;
- SvREFCNT_dec(sv);
- }
- else { /* First pass */
- if (PL_reginterp_cnt < ++RExC_seen_evals
- && IN_PERL_RUNTIME)
- /* No compiled RE interpolated, has runtime
- components ===> unsafe. */
- FAIL("Eval-group not allowed at runtime, use re 'eval'");
- if (PL_tainting && PL_tainted)
- FAIL("Eval-group in insecure regular expression");
-#if PERL_VERSION > 8
- if (IN_PERL_COMPILETIME)
- PL_cv_has_eval = 1;
-#endif
- }
-
- nextchar(pRExC_state);
- if (is_logical) {
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 2;
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, EVAL, n));
- /* deal with the length of this later - MJD */
- return ret;
- }
- ret = reganode(pRExC_state, EVAL, n);
- Set_Node_Length(ret, RExC_parse - parse_start + 1);
- Set_Node_Offset(ret, parse_start);
- return ret;
- }
- case '(': /* (?(?{...})...) and (?(?=...)...) */
- {
- int is_define= 0;
- if (RExC_parse[0] == '?') { /* (?(?...)) */
- if (RExC_parse[1] == '=' || RExC_parse[1] == '!'
- || RExC_parse[1] == '<'
- || RExC_parse[1] == '{') { /* Lookahead or eval. */
- I32 flag;
-
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 1;
- REGTAIL(pRExC_state, ret, reg(pRExC_state, 1, &flag,depth+1));
- goto insert_if;
- }
- }
- else if ( RExC_parse[0] == '<' /* (?(<NAME>)...) */
- || RExC_parse[0] == '\'' ) /* (?('NAME')...) */
- {
- char ch = RExC_parse[0] == '<' ? '>' : '\'';
- char *name_start= RExC_parse++;
- U32 num = 0;
- SV *sv_dat=reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence (?(%c... not terminated",
- (ch == '>' ? '<' : ch));
- RExC_parse++;
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- ret = reganode(pRExC_state,NGROUPP,num);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'D' &&
- RExC_parse[1] == 'E' &&
- RExC_parse[2] == 'F' &&
- RExC_parse[3] == 'I' &&
- RExC_parse[4] == 'N' &&
- RExC_parse[5] == 'E')
- {
- ret = reganode(pRExC_state,DEFINEP,0);
- RExC_parse +=6 ;
- is_define = 1;
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'R') {
- RExC_parse++;
- parno = 0;
- if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- parno = atoi(RExC_parse++);
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- } else if (RExC_parse[0] == '&') {
- SV *sv_dat;
- RExC_parse++;
- sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- parno = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- ret = reganode(pRExC_state,INSUBP,parno);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- /* (?(1)...) */
- char c;
- parno = atoi(RExC_parse++);
-
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- ret = reganode(pRExC_state, GROUPP, parno);
-
- insert_if_check_paren:
- if ((c = *nextchar(pRExC_state)) != ')')
- vFAIL("Switch condition not recognized");
- insert_if:
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0));
- br = regbranch(pRExC_state, &flags, 1,depth+1);
- if (br == NULL)
- br = reganode(pRExC_state, LONGJMP, 0);
- else
- REGTAIL(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0));
- c = *nextchar(pRExC_state);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- if (c == '|') {
- if (is_define)
- vFAIL("(?(DEFINE)....) does not allow branches");
- lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */
- regbranch(pRExC_state, &flags, 1,depth+1);
- REGTAIL(pRExC_state, ret, lastbr);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- c = *nextchar(pRExC_state);
- }
- else
- lastbr = NULL;
- if (c != ')')
- vFAIL("Switch (?(condition)... contains too many branches");
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, br, ender);
- if (lastbr) {
- REGTAIL(pRExC_state, lastbr, ender);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender);
- }
- else
- REGTAIL(pRExC_state, ret, ender);
- RExC_size++; /* XXX WHY do we need this?!!
- For large programs it seems to be required
- but I can't figure out why. -- dmq*/
- return ret;
- }
- else {
- vFAIL2("Unknown switch condition (?(%.2s", RExC_parse);
- }
- }
- case 0:
- RExC_parse--; /* for vFAIL to print correctly */
- vFAIL("Sequence (? incomplete");
- break;
- default:
- --RExC_parse;
- parse_flags: /* (?i) */
- {
- U32 posflags = 0, negflags = 0;
- U32 *flagsp = &posflags;
-
- while (*RExC_parse) {
- /* && strchr("iogcmsx", *RExC_parse) */
- /* (?g), (?gc) and (?o) are useless here
- and must be globally applied -- japhy */
- switch (*RExC_parse) {
- CASE_STD_PMMOD_FLAGS_PARSE_SET(flagsp);
- case ONCE_PAT_MOD: /* 'o' */
- case GLOBAL_PAT_MOD: /* 'g' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- const I32 wflagbit = *RExC_parse == 'o' ? WASTED_O : WASTED_G;
- if (! (wastedflags & wflagbit) ) {
- wastedflags |= wflagbit;
- vWARN5(
- RExC_parse + 1,
- "Useless (%s%c) - %suse /%c modifier",
- flagsp == &negflags ? "?-" : "?",
- *RExC_parse,
- flagsp == &negflags ? "don't " : "",
- *RExC_parse
- );
- }
- }
- break;
-
- case CONTINUE_PAT_MOD: /* 'c' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- if (! (wastedflags & WASTED_C) ) {
- wastedflags |= WASTED_GC;
- vWARN3(
- RExC_parse + 1,
- "Useless (%sc) - %suse /gc modifier",
- flagsp == &negflags ? "?-" : "?",
- flagsp == &negflags ? "don't " : ""
- );
- }
- }
- break;
- case KEEPCOPY_PAT_MOD: /* 'p' */
- if (flagsp == &negflags) {
- if (SIZE_ONLY)
- ckWARNreg(RExC_parse + 1,"Useless use of (?-p)");
- } else {
- *flagsp |= RXf_PMf_KEEPCOPY;
- }
- break;
- case '-':
- if (flagsp == &negflags) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- flagsp = &negflags;
- wastedflags = 0; /* reset so (?g-c) warns twice */
- break;
- case ':':
- paren = ':';
- /*FALLTHROUGH*/
- case ')':
- RExC_flags |= posflags;
- RExC_flags &= ~negflags;
- if (paren != ':') {
- oregflags |= posflags;
- oregflags &= ~negflags;
- }
- nextchar(pRExC_state);
- if (paren != ':') {
- *flagp = TRYAGAIN;
- return NULL;
- } else {
- ret = NULL;
- goto parse_rest;
- }
- /*NOTREACHED*/
- default:
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- ++RExC_parse;
- }
- }} /* one for the default block, one for the switch */
- }
- else { /* (...) */
- capturing_parens:
- parno = RExC_npar;
- RExC_npar++;
-
- ret = reganode(pRExC_state, OPEN, parno);
- if (!SIZE_ONLY ){
- if (!RExC_nestroot)
- RExC_nestroot = parno;
- if (RExC_seen & REG_SEEN_RECURSE
- && !RExC_open_parens[parno-1])
- {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting open paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ret)));
- RExC_open_parens[parno-1]= ret;
- }
- }
- Set_Node_Length(ret, 1); /* MJD */
- Set_Node_Offset(ret, RExC_parse); /* MJD */
- is_open = 1;
- }
- }
- else /* ! paren */
- ret = NULL;
-
- parse_rest:
- /* Pick up the branches, linking them together. */
- parse_start = RExC_parse; /* MJD */
- br = regbranch(pRExC_state, &flags, 1,depth+1);
-
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
-
- /* branch_len = (paren != 0); */
-
- if (br == NULL)
- return(NULL);
- if (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, BRANCHJ, br, depth+1);
- }
- else { /* MJD */
- reginsert(pRExC_state, BRANCH, br, depth+1);
- Set_Node_Length(br, paren != 0);
- Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start);
- }
- have_branch = 1;
- if (SIZE_ONLY)
- RExC_extralen += 1; /* For BRANCHJ-BRANCH. */
- }
- else if (paren == ':') {
- *flagp |= flags&SIMPLE;
- }
- if (is_open) { /* Starts with OPEN. */
- REGTAIL(pRExC_state, ret, br); /* OPEN -> first. */
- }
- else if (paren != '?') /* Not Conditional */
- ret = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- lastbr = br;
- while (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- ender = reganode(pRExC_state, LONGJMP,0);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */
- }
- if (SIZE_ONLY)
- RExC_extralen += 2; /* Account for LONGJMP. */
- nextchar(pRExC_state);
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
- br = regbranch(pRExC_state, &flags, 0, depth+1);
-
- if (br == NULL)
- return(NULL);
- REGTAIL(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */
- lastbr = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- }
-
- if (have_branch || paren != ':') {
- /* Make a closing node, and hook it on the end. */
- switch (paren) {
- case ':':
- ender = reg_node(pRExC_state, TAIL);
- break;
- case 1:
- ender = reganode(pRExC_state, CLOSE, parno);
- if (!SIZE_ONLY && RExC_seen & REG_SEEN_RECURSE) {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting close paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ender)));
- RExC_close_parens[parno-1]= ender;
- if (RExC_nestroot == parno)
- RExC_nestroot = 0;
- }
- Set_Node_Offset(ender,RExC_parse+1); /* MJD */
- Set_Node_Length(ender,1); /* MJD */
- break;
- case '<':
- case ',':
- case '=':
- case '!':
- *flagp &= ~HASWIDTH;
- /* FALL THROUGH */
- case '>':
- ender = reg_node(pRExC_state, SUCCEED);
- break;
- case 0:
- ender = reg_node(pRExC_state, END);
- if (!SIZE_ONLY) {
- assert(!RExC_opend); /* there can only be one! */
- RExC_opend = ender;
- }
- break;
- }
- REGTAIL(pRExC_state, lastbr, ender);
-
- if (have_branch && !SIZE_ONLY) {
- if (depth==1)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
-
- /* Hook the tails of the branches to the closing node. */
- for (br = ret; br; br = regnext(br)) {
- const U8 op = PL_regkind[OP(br)];
- if (op == BRANCH) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(br), ender);
- }
- else if (op == BRANCHJ) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(NEXTOPER(br)), ender);
- }
- }
- }
- }
-
- {
- const char *p;
- static const char parens[] = "=!<,>";
-
- if (paren && (p = strchr(parens, paren))) {
- U8 node = ((p - parens) % 2) ? UNLESSM : IFMATCH;
- int flag = (p - parens) > 1;
-
- if (paren == '>')
- node = SUSPEND, flag = 0;
- reginsert(pRExC_state, node,ret, depth+1);
- Set_Node_Cur_Length(ret);
- Set_Node_Offset(ret, parse_start + 1);
- ret->flags = flag;
- REGTAIL_STUDY(pRExC_state, ret, reg_node(pRExC_state, TAIL));
- }
- }
-
- /* Check for proper termination. */
- if (paren) {
- RExC_flags = oregflags;
- if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched (");
- }
- }
- else if (!paren && RExC_parse < RExC_end) {
- if (*RExC_parse == ')') {
- RExC_parse++;
- vFAIL("Unmatched )");
- }
- else
- FAIL("Junk on end of regexp"); /* "Can't happen". */
- /* NOTREACHED */
- }
- if (after_freeze)
- RExC_npar = after_freeze;
- return(ret);
-}
-
-/*
- - regbranch - one alternative of an | operator
- *
- * Implements the concatenation operator.
- */
-STATIC regnode *
-S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register regnode *chain = NULL;
- register regnode *latest;
- I32 flags = 0, c = 0;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGBRANCH;
-
- DEBUG_PARSE("brnc");
-
- if (first)
- ret = NULL;
- else {
- if (!SIZE_ONLY && RExC_extralen)
- ret = reganode(pRExC_state, BRANCHJ,0);
- else {
- ret = reg_node(pRExC_state, BRANCH);
- Set_Node_Length(ret, 1);
- }
- }
-
- if (!first && SIZE_ONLY)
- RExC_extralen += 1; /* BRANCHJ */
-
- *flagp = WORST; /* Tentatively. */
-
- RExC_parse--;
- nextchar(pRExC_state);
- while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') {
- flags &= ~TRYAGAIN;
- latest = regpiece(pRExC_state, &flags,depth+1);
- if (latest == NULL) {
- if (flags & TRYAGAIN)
- continue;
- return(NULL);
- }
- else if (ret == NULL)
- ret = latest;
- *flagp |= flags&(HASWIDTH|POSTPONED);
- if (chain == NULL) /* First piece. */
- *flagp |= flags&SPSTART;
- else {
- RExC_naughty++;
- REGTAIL(pRExC_state, chain, latest);
- }
- chain = latest;
- c++;
- }
- if (chain == NULL) { /* Loop ran zero times. */
- chain = reg_node(pRExC_state, NOTHING);
- if (ret == NULL)
- ret = chain;
- }
- if (c == 1) {
- *flagp |= flags&SIMPLE;
- }
-
- return ret;
-}
-
-/*
- - regpiece - something followed by possible [*+?]
- *
- * Note that the branching code sequences used for ? and the general cases
- * of * and + are somewhat optimized: they use the same NOTHING node as
- * both the endmarker for their branch list and the body of the last branch.
- * It might seem that this node could be dispensed with entirely, but the
- * endmarker role is not redundant.
- */
-STATIC regnode *
-S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register char op;
- register char *next;
- I32 flags;
- const char * const origparse = RExC_parse;
- I32 min;
- I32 max = REG_INFTY;
- char *parse_start;
- const char *maxpos = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPIECE;
-
- DEBUG_PARSE("piec");
-
- ret = regatom(pRExC_state, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN)
- *flagp |= TRYAGAIN;
- return(NULL);
- }
-
- op = *RExC_parse;
-
- if (op == '{' && regcurly(RExC_parse)) {
- maxpos = NULL;
- parse_start = RExC_parse; /* MJD */
- next = RExC_parse + 1;
- while (isDIGIT(*next) || *next == ',') {
- if (*next == ',') {
- if (maxpos)
- break;
- else
- maxpos = next;
- }
- next++;
- }
- if (*next == '}') { /* got one */
- if (!maxpos)
- maxpos = next;
- RExC_parse++;
- min = atoi(RExC_parse);
- if (*maxpos == ',')
- maxpos++;
- else
- maxpos = RExC_parse;
- max = atoi(maxpos);
- if (!max && *maxpos != '0')
- max = REG_INFTY; /* meaning "infinity" */
- else if (max >= REG_INFTY)
- vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1);
- RExC_parse = next;
- nextchar(pRExC_state);
-
- do_curly:
- if ((flags&SIMPLE)) {
- RExC_naughty += 2 + RExC_naughty / 2;
- reginsert(pRExC_state, CURLY, ret, depth+1);
- Set_Node_Offset(ret, parse_start+1); /* MJD */
- Set_Node_Cur_Length(ret);
- }
- else {
- regnode * const w = reg_node(pRExC_state, WHILEM);
-
- w->flags = 0;
- REGTAIL(pRExC_state, ret, w);
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, LONGJMP,ret, depth+1);
- reginsert(pRExC_state, NOTHING,ret, depth+1);
- NEXT_OFF(ret) = 3; /* Go over LONGJMP. */
- }
- reginsert(pRExC_state, CURLYX,ret, depth+1);
- /* MJD hk */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Length(ret,
- op == '{' ? (RExC_parse - parse_start) : 1);
-
- if (!SIZE_ONLY && RExC_extralen)
- NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */
- REGTAIL(pRExC_state, ret, reg_node(pRExC_state, NOTHING));
- if (SIZE_ONLY)
- RExC_whilem_seen++, RExC_extralen += 3;
- RExC_naughty += 4 + RExC_naughty; /* compound interest */
- }
- ret->flags = 0;
-
- if (min > 0)
- *flagp = WORST;
- if (max > 0)
- *flagp |= HASWIDTH;
- if (max < min)
- vFAIL("Can't do {n,m} with n > m");
- if (!SIZE_ONLY) {
- ARG1_SET(ret, (U16)min);
- ARG2_SET(ret, (U16)max);
- }
-
- goto nest_check;
- }
- }
-
- if (!ISMULT1(op)) {
- *flagp = flags;
- return(ret);
- }
-
-#if 0 /* Now runtime fix should be reliable. */
-
- /* if this is reinstated, don't forget to put this back into perldiag:
-
- =item Regexp *+ operand could be empty at {#} in regex m/%s/
-
- (F) The part of the regexp subject to either the * or + quantifier
- could match an empty string. The {#} shows in the regular
- expression about where the problem was discovered.
-
- */
-
- if (!(flags&HASWIDTH) && op != '?')
- vFAIL("Regexp *+ operand could be empty");
-#endif
-
- parse_start = RExC_parse;
- nextchar(pRExC_state);
-
- *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH);
-
- if (op == '*' && (flags&SIMPLE)) {
- reginsert(pRExC_state, STAR, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 4;
- }
- else if (op == '*') {
- min = 0;
- goto do_curly;
- }
- else if (op == '+' && (flags&SIMPLE)) {
- reginsert(pRExC_state, PLUS, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 3;
- }
- else if (op == '+') {
- min = 1;
- goto do_curly;
- }
- else if (op == '?') {
- min = 0; max = 1;
- goto do_curly;
- }
- nest_check:
- if (!SIZE_ONLY && !(flags&(HASWIDTH|POSTPONED)) && max > REG_INFTY/3) {
- ckWARN3reg(RExC_parse,
- "%.*s matches null string many times",
- (int)(RExC_parse >= origparse ? RExC_parse - origparse : 0),
- origparse);
- }
-
- if (RExC_parse < RExC_end && *RExC_parse == '?') {
- nextchar(pRExC_state);
- reginsert(pRExC_state, MINMOD, ret, depth+1);
- REGTAIL(pRExC_state, ret, ret + NODE_STEP_REGNODE);
- }
-#ifndef REG_ALLOW_MINMOD_SUSPEND
- else
-#endif
- if (RExC_parse < RExC_end && *RExC_parse == '+') {
- regnode *ender;
- nextchar(pRExC_state);
- ender = reg_node(pRExC_state, SUCCEED);
- REGTAIL(pRExC_state, ret, ender);
- reginsert(pRExC_state, SUSPEND, ret, depth+1);
- ret->flags = 0;
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, ret, ender);
- /*ret= ender;*/
- }
-
- if (RExC_parse < RExC_end && ISMULT2(RExC_parse)) {
- RExC_parse++;
- vFAIL("Nested quantifiers");
- }
-
- return(ret);
-}
-
-
-/* reg_namedseq(pRExC_state,UVp)
-
- This is expected to be called by a parser routine that has
- recognized '\N' and needs to handle the rest. RExC_parse is
- expected to point at the first char following the N at the time
- of the call.
-
- If valuep is non-null then it is assumed that we are parsing inside
- of a charclass definition and the first codepoint in the resolved
- string is returned via *valuep and the routine will return NULL.
- In this mode if a multichar string is returned from the charnames
- handler a warning will be issued, and only the first char in the
- sequence will be examined. If the string returned is zero length
- then the value of *valuep is undefined and NON-NULL will
- be returned to indicate failure. (This will NOT be a valid pointer
- to a regnode.)
-
- If valuep is null then it is assumed that we are parsing normal text
- and inserts a new EXACT node into the program containing the resolved
- string and returns a pointer to the new node. If the string is
- zerolength a NOTHING node is emitted.
-
- On success RExC_parse is set to the char following the endbrace.
- Parsing failures will generate a fatal errorvia vFAIL(...)
-
- NOTE: We cache all results from the charnames handler locally in
- the RExC_charnames hash (created on first use) to prevent a charnames
- handler from playing silly-buggers and returning a short string and
- then a long string for a given pattern. Since the regexp program
- size is calculated during an initial parse this would result
- in a buffer overrun so we cache to prevent the charname result from
- changing during the course of the parse.
-
- */
-STATIC regnode *
-S_reg_namedseq(pTHX_ RExC_state_t *pRExC_state, UV *valuep, I32 *flagp)
-{
- char * name; /* start of the content of the name */
- char * endbrace; /* endbrace following the name */
- SV *sv_str = NULL;
- SV *sv_name = NULL;
- STRLEN len; /* this has various purposes throughout the code */
- bool cached = 0; /* if this is true then we shouldn't refcount dev sv_str */
- regnode *ret = NULL;
-
- PERL_ARGS_ASSERT_REG_NAMEDSEQ;
-
- if (*RExC_parse != '{' ||
- (*RExC_parse == '{' && RExC_parse[1]
- && strchr("0123456789", RExC_parse[1])))
- {
- GET_RE_DEBUG_FLAGS_DECL;
- if (valuep)
- /* no bare \N in a charclass */
- vFAIL("Missing braces on \\N{}");
- GET_RE_DEBUG_FLAGS;
- nextchar(pRExC_state);
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- RExC_parse--;
- Set_Node_Length(ret, 1); /* MJD */
- return ret;
- }
- name = RExC_parse+1;
- endbrace = strchr(RExC_parse, '}');
- if ( ! endbrace ) {
- RExC_parse++;
- vFAIL("Missing right brace on \\N{}");
- }
- RExC_parse = endbrace + 1;
-
-
- /* RExC_parse points at the beginning brace,
- endbrace points at the last */
- if ( name[0]=='U' && name[1]=='+' ) {
- /* its a "Unicode hex" notation {U+89AB} */
- I32 fl = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX
- | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0);
- UV cp;
- len = (STRLEN)(endbrace - name - 2);
- cp = grok_hex(name + 2, &len, &fl, NULL);
- if ( len != (STRLEN)(endbrace - name - 2) ) {
- cp = 0xFFFD;
- }
- if ( valuep ) {
- if (cp > 0xff) RExC_utf8 = 1;
- *valuep = cp;
- return NULL;
- }
-
- /* Need to convert to utf8 if either: won't fit into a byte, or the re
- * is going to be in utf8 and the representation changes under utf8. */
- if (cp > 0xff || (RExC_utf8 && ! UNI_IS_INVARIANT(cp))) {
- U8 string[UTF8_MAXBYTES+1];
- U8 *tmps;
- RExC_utf8 = 1;
- tmps = uvuni_to_utf8(string, cp);
- sv_str = newSVpvn_utf8((char*)string, tmps - string, TRUE);
- } else { /* Otherwise, no need for utf8, can skip that step */
- char string;
- string = (char)cp;
- sv_str= newSVpvn(&string, 1);
- }
- } else {
- /* fetch the charnames handler for this scope */
- HV * const table = GvHV(PL_hintgv);
- SV **cvp= table ?
- hv_fetchs(table, "charnames", FALSE) :
- NULL;
- SV *cv= cvp ? *cvp : NULL;
- HE *he_str;
- int count;
- /* create an SV with the name as argument */
- sv_name = newSVpvn(name, endbrace - name);
-
- if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
- vFAIL2("Constant(\\N{%" SVf "}) unknown: "
- "(possibly a missing \"use charnames ...\")",
- SVfARG(sv_name));
- }
- if (!cvp || !SvOK(*cvp)) { /* when $^H{charnames} = undef; */
- vFAIL2("Constant(\\N{%" SVf "}): "
- "$^H{charnames} is not defined", SVfARG(sv_name));
- }
-
-
-
- if (!RExC_charnames) {
- /* make sure our cache is allocated */
- RExC_charnames = newHV();
- sv_2mortal(MUTABLE_SV(RExC_charnames));
- }
- /* see if we have looked this one up before */
- he_str = hv_fetch_ent( RExC_charnames, sv_name, 0, 0 );
- if ( he_str ) {
- sv_str = HeVAL(he_str);
- cached = 1;
- } else {
- dSP ;
-
- ENTER ;
- SAVETMPS ;
- PUSHMARK(SP) ;
-
- XPUSHs(sv_name);
-
- PUTBACK ;
-
- count= call_sv(cv, G_SCALAR);
-
- if (count == 1) { /* XXXX is this right? dmq */
- sv_str = POPs;
- SvREFCNT_inc_simple_void(sv_str);
- }
-
- SPAGAIN ;
- PUTBACK ;
- FREETMPS ;
- LEAVE ;
-
- if ( !sv_str || !SvOK(sv_str) ) {
- vFAIL2("Constant(\\N{%" SVf "}): Call to &{$^H{charnames}} "
- "did not return a defined value", SVfARG(sv_name));
- }
- if (hv_store_ent( RExC_charnames, sv_name, sv_str, 0))
- cached = 1;
- }
- }
- if (valuep) {
- char *p = SvPV(sv_str, len);
- if (len) {
- STRLEN numlen = 1;
- if ( SvUTF8(sv_str) ) {
- *valuep = utf8_to_uvchr((U8*)p, &numlen);
- if (*valuep > 0x7F)
- RExC_utf8 = 1;
- /* XXXX
- We have to turn on utf8 for high bit chars otherwise
- we get failures with
-
- "ss" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
- "SS" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
-
- This is different from what \x{} would do with the same
- codepoint, where the condition is > 0xFF.
- - dmq
- */
-
-
- } else {
- *valuep = (UV)*p;
- /* warn if we havent used the whole string? */
- }
- if (numlen<len && SIZE_ONLY) {
- ckWARN2reg(RExC_parse,
- "Ignoring excess chars from \\N{%" SVf "} in character class",
- SVfARG(sv_name)
- );
- }
- } else if (SIZE_ONLY) {
- ckWARN2reg(RExC_parse,
- "Ignoring zero length \\N{%" SVf "} in character class",
- SVfARG(sv_name)
- );
- }
- SvREFCNT_dec(sv_name);
- if (!cached)
- SvREFCNT_dec(sv_str);
- return len ? NULL : (regnode *)&len;
- } else if(SvCUR(sv_str)) {
-
- char *s;
- char *p, *pend;
- STRLEN charlen = 1;
-#ifdef DEBUGGING
- char * parse_start = name-3; /* needed for the offsets */
-#endif
- GET_RE_DEBUG_FLAGS_DECL; /* needed for the offsets */
-
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s= STRING(ret);
-
- if ( RExC_utf8 && !SvUTF8(sv_str) ) {
- sv_utf8_upgrade(sv_str);
- } else if ( !RExC_utf8 && SvUTF8(sv_str) ) {
- RExC_utf8= 1;
- }
-
- p = SvPV(sv_str, len);
- pend = p + len;
- /* len is the length written, charlen is the size the char read */
- for ( len = 0; p < pend; p += charlen ) {
- if (UTF) {
- UV uvc = utf8_to_uvchr((U8*)p, &charlen);
- if (FOLD) {
- STRLEN foldlen,numlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
- uvc = toFOLD_uni(uvc, tmpbuf, &foldlen);
- /* Emit all the Unicode characters. */
-
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen)
- {
- uvc = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- } else {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- } else {
- len++;
- REGC(*p, s++);
- }
- }
- if (SIZE_ONLY) {
- RExC_size += STR_SZ(len);
- } else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- } else { /* zero length */
- ret = reg_node(pRExC_state,NOTHING);
- }
- SvREFCNT_dec(sv_name);
- if (!cached)
- SvREFCNT_dec(sv_str);
- return ret;
-
-}
-
-
-/*
- * reg_recode
- *
- * It returns the code point in utf8 for the value in *encp.
- * value: a code value in the source encoding
- * encp: a pointer to an Encode object
- *
- * If the result from Encode is not a single character,
- * it returns U+FFFD (Replacement character) and sets *encp to NULL.
- */
-STATIC UV
-S_reg_recode(pTHX_ const char value, SV **encp)
-{
- STRLEN numlen = 1;
- SV * const sv = newSVpvn_flags(&value, numlen, SVs_TEMP);
- const char * const s = *encp ? sv_recode_to_utf8(sv, *encp) : SvPVX(sv);
- const STRLEN newlen = SvCUR(sv);
- UV uv = UNICODE_REPLACEMENT;
-
- PERL_ARGS_ASSERT_REG_RECODE;
-
- if (newlen)
- uv = SvUTF8(sv)
- ? utf8n_to_uvchr((U8*)s, newlen, &numlen, UTF8_ALLOW_DEFAULT)
- : *(U8*)s;
-
- if (!newlen || numlen != newlen) {
- uv = UNICODE_REPLACEMENT;
- *encp = NULL;
- }
- return uv;
-}
-
-
-/*
- - regatom - the lowest level
-
- Try to identify anything special at the start of the pattern. If there
- is, then handle it as required. This may involve generating a single regop,
- such as for an assertion; or it may involve recursing, such as to
- handle a () structure.
-
- If the string doesn't start with something special then we gobble up
- as much literal text as we can.
-
- Once we have been able to handle whatever type of thing started the
- sequence, we return.
-
- Note: we have to be careful with escapes, as they can be both literal
- and special, and in the case of \10 and friends can either, depending
- on context. Specifically there are two seperate switches for handling
- escape sequences, with the one for handling literal escapes requiring
- a dummy entry for all of the special escapes that are actually handled
- by the other.
-*/
-
-STATIC regnode *
-S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret = NULL;
- I32 flags;
- char *parse_start = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_PARSE("atom");
- *flagp = WORST; /* Tentatively. */
-
- PERL_ARGS_ASSERT_REGATOM;
-
-tryagain:
- switch ((U8)*RExC_parse) {
- case '^':
- RExC_seen_zerolen++;
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MBOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SBOL);
- else
- ret = reg_node(pRExC_state, BOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '$':
- nextchar(pRExC_state);
- if (*RExC_parse)
- RExC_seen_zerolen++;
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MEOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SEOL);
- else
- ret = reg_node(pRExC_state, EOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '.':
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SANY);
- else
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '[':
- {
- char * const oregcomp_parse = ++RExC_parse;
- ret = regclass(pRExC_state,depth+1);
- if (*RExC_parse != ']') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched [");
- }
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */
- break;
- }
- case '(':
- nextchar(pRExC_state);
- ret = reg(pRExC_state, 1, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN) {
- if (RExC_parse == RExC_end) {
- /* Make parent create an empty node if needed. */
- *flagp |= TRYAGAIN;
- return(NULL);
- }
- goto tryagain;
- }
- return(NULL);
- }
- *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE|POSTPONED);
- break;
- case '|':
- case ')':
- if (flags & TRYAGAIN) {
- *flagp |= TRYAGAIN;
- return NULL;
- }
- vFAIL("Internal urp");
- /* Supposed to be caught earlier. */
- break;
- case '{':
- if (!regcurly(RExC_parse)) {
- RExC_parse++;
- goto defchar;
- }
- /* FALL THROUGH */
- case '?':
- case '+':
- case '*':
- RExC_parse++;
- vFAIL("Quantifier follows nothing");
- break;
- case 0xDF:
- case 0xC3:
- case 0xCE:
- do_foldchar:
- if (!LOC && FOLD) {
- U32 len,cp;
- len=0; /* silence a spurious compiler warning */
- if ((cp = what_len_TRICKYFOLD_safe(RExC_parse,RExC_end,UTF,len))) {
- *flagp |= HASWIDTH; /* could be SIMPLE too, but needs a handler in regexec.regrepeat */
- RExC_parse+=len-1; /* we get one from nextchar() as well. :-( */
- ret = reganode(pRExC_state, FOLDCHAR, cp);
- Set_Node_Length(ret, 1); /* MJD */
- nextchar(pRExC_state); /* kill whitespace under /x */
- return ret;
- }
- }
- goto outer_default;
- case '\\':
- /* Special Escapes
-
- This switch handles escape sequences that resolve to some kind
- of special regop and not to literal text. Escape sequnces that
- resolve to literal text are handled below in the switch marked
- "Literal Escapes".
-
- Every entry in this switch *must* have a corresponding entry
- in the literal escape switch. However, the opposite is not
- required, as the default for this switch is to jump to the
- literal text handling code.
- */
- switch ((U8)*++RExC_parse) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- goto do_foldchar;
- /* Special Escapes */
- case 'A':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, SBOL);
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'G':
- ret = reg_node(pRExC_state, GPOS);
- RExC_seen |= REG_SEEN_GPOS;
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'K':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, KEEPS);
- *flagp |= SIMPLE;
- /* XXX:dmq : disabling in-place substitution seems to
- * be necessary here to avoid cases of memory corruption, as
- * with: C<$_="x" x 80; s/x\K/y/> -- rgs
- */
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- goto finish_meta_pat;
- case 'Z':
- ret = reg_node(pRExC_state, SEOL);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'z':
- ret = reg_node(pRExC_state, EOS);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'C':
- ret = reg_node(pRExC_state, CANY);
- RExC_seen |= REG_SEEN_CANY;
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'X':
- ret = reg_node(pRExC_state, CLUMP);
- *flagp |= HASWIDTH;
- goto finish_meta_pat;
- case 'w':
- ret = reg_node(pRExC_state, (U8)(LOC ? ALNUML : ALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'W':
- ret = reg_node(pRExC_state, (U8)(LOC ? NALNUML : NALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'b':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? BOUNDL : BOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'B':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? NBOUNDL : NBOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 's':
- ret = reg_node(pRExC_state, (U8)(LOC ? SPACEL : SPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'S':
- ret = reg_node(pRExC_state, (U8)(LOC ? NSPACEL : NSPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'd':
- ret = reg_node(pRExC_state, DIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'D':
- ret = reg_node(pRExC_state, NDIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'R':
- ret = reg_node(pRExC_state, LNBREAK);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'h':
- ret = reg_node(pRExC_state, HORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'H':
- ret = reg_node(pRExC_state, NHORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'v':
- ret = reg_node(pRExC_state, VERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'V':
- ret = reg_node(pRExC_state, NVERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- finish_meta_pat:
- nextchar(pRExC_state);
- Set_Node_Length(ret, 2); /* MJD */
- break;
- case 'p':
- case 'P':
- {
- char* const oldregxend = RExC_end;
-#ifdef DEBUGGING
- char* parse_start = RExC_parse - 2;
-#endif
-
- if (RExC_parse[1] == '{') {
- /* a lovely hack--pretend we saw [\pX] instead */
- RExC_end = strchr(RExC_parse, '}');
- if (!RExC_end) {
- const U8 c = (U8)*RExC_parse;
- RExC_parse += 2;
- RExC_end = oldregxend;
- vFAIL2("Missing right brace on \\%c{}", c);
- }
- RExC_end++;
- }
- else {
- RExC_end = RExC_parse + 2;
- if (RExC_end > oldregxend)
- RExC_end = oldregxend;
- }
- RExC_parse--;
-
- ret = regclass(pRExC_state,depth+1);
-
- RExC_end = oldregxend;
- RExC_parse--;
-
- Set_Node_Offset(ret, parse_start + 2);
- Set_Node_Cur_Length(ret);
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- }
- break;
- case 'N':
- /* Handle \N and \N{NAME} here and not below because it can be
- multicharacter. join_exact() will join them up later on.
- Also this makes sure that things like /\N{BLAH}+/ and
- \N{BLAH} being multi char Just Happen. dmq*/
- ++RExC_parse;
- ret= reg_namedseq(pRExC_state, NULL, flagp);
- break;
- case 'k': /* Handle \k<NAME> and \k'NAME' */
- parse_named_seq:
- {
- char ch= RExC_parse[1];
- if (ch != '<' && ch != '\'' && ch != '{') {
- RExC_parse++;
- vFAIL2("Sequence %.2s... not terminated",parse_start);
- } else {
- /* this pretty much dupes the code for (?P=...) in reg(), if
- you change this make sure you change that */
- char* name_start = (RExC_parse += 2);
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- ch= (ch == '<') ? '>' : (ch == '{') ? '}' : '\'';
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
-
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
-
- }
- break;
- }
- case 'g':
- case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 num;
- bool isg = *RExC_parse == 'g';
- bool isrel = 0;
- bool hasbrace = 0;
- if (isg) {
- RExC_parse++;
- if (*RExC_parse == '{') {
- RExC_parse++;
- hasbrace = 1;
- }
- if (*RExC_parse == '-') {
- RExC_parse++;
- isrel = 1;
- }
- if (hasbrace && !isDIGIT(*RExC_parse)) {
- if (isrel) RExC_parse--;
- RExC_parse -= 2;
- goto parse_named_seq;
- } }
- num = atoi(RExC_parse);
- if (isg && num == 0)
- vFAIL("Reference to invalid group 0");
- if (isrel) {
- num = RExC_npar - num;
- if (num < 1)
- vFAIL("Reference to nonexistent or unclosed group");
- }
- if (!isg && num > 9 && num >= RExC_npar)
- goto defchar;
- else {
- char * const parse_start = RExC_parse - 1; /* MJD */
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (parse_start == RExC_parse - 1)
- vFAIL("Unterminated \\g... pattern");
- if (hasbrace) {
- if (*RExC_parse != '}')
- vFAIL("Unterminated \\g{...} pattern");
- RExC_parse++;
- }
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens)
- vFAIL("Reference to nonexistent group");
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? REFFL : REFF) : REF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- }
- }
- break;
- case '\0':
- if (RExC_parse >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- /* Do not generate "unrecognized" warnings here, we fall
- back into the quick-grab loop below */
- parse_start--;
- goto defchar;
- }
- break;
-
- case '#':
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if ( reg_skipcomment( pRExC_state ) )
- goto tryagain;
- }
- /* FALL THROUGH */
-
- default:
- outer_default:{
- register STRLEN len;
- register UV ender;
- register char *p;
- char *s;
- STRLEN foldlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
-
- parse_start = RExC_parse - 1;
-
- RExC_parse++;
-
- defchar:
- ender = 0;
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s = STRING(ret);
- for (len = 0, p = RExC_parse - 1;
- len < 127 && p < RExC_end;
- len++)
- {
- char * const oldp = p;
-
- if (RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- switch ((U8)*p) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case '^':
- case '$':
- case '.':
- case '[':
- case '(':
- case ')':
- case '|':
- goto loopdone;
- case '\\':
- /* Literal Escapes Switch
-
- This switch is meant to handle escape sequences that
- resolve to a literal character.
-
- Every escape sequence that represents something
- else, like an assertion or a char class, is handled
- in the switch marked 'Special Escapes' above in this
- routine, but also has an entry here as anything that
- isn't explicitly mentioned here will be treated as
- an unescaped equivalent literal.
- */
-
- switch ((U8)*++p) {
- /* These are all the special escapes. */
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case 'A': /* Start assertion */
- case 'b': case 'B': /* Word-boundary assertion*/
- case 'C': /* Single char !DANGEROUS! */
- case 'd': case 'D': /* digit class */
- case 'g': case 'G': /* generic-backref, pos assertion */
- case 'h': case 'H': /* HORIZWS */
- case 'k': case 'K': /* named backref, keep marker */
- case 'N': /* named char sequence */
- case 'p': case 'P': /* Unicode property */
- case 'R': /* LNBREAK */
- case 's': case 'S': /* space class */
- case 'v': case 'V': /* VERTWS */
- case 'w': case 'W': /* word class */
- case 'X': /* eXtended Unicode "combining character sequence" */
- case 'z': case 'Z': /* End of line/string assertion */
- --p;
- goto loopdone;
-
- /* Anything after here is an escape that resolves to a
- literal. (Except digits, which may or may not)
- */
- case 'n':
- ender = '\n';
- p++;
- break;
- case 'r':
- ender = '\r';
- p++;
- break;
- case 't':
- ender = '\t';
- p++;
- break;
- case 'f':
- ender = '\f';
- p++;
- break;
- case 'e':
- ender = ASCII_TO_NATIVE('\033');
- p++;
- break;
- case 'a':
- ender = ASCII_TO_NATIVE('\007');
- p++;
- break;
- case 'x':
- if (*++p == '{') {
- char* const e = strchr(p, '}');
-
- if (!e) {
- RExC_parse = p + 1;
- vFAIL("Missing right brace on \\x{}");
- }
- else {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = e - p - 1;
- ender = grok_hex(p + 1, &numlen, &flags, NULL);
- if (ender > 0xff)
- RExC_utf8 = 1;
- p = e + 1;
- }
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = 2;
- ender = grok_hex(p, &numlen, &flags, NULL);
- p += numlen;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- p++;
- ender = UCHARAT(p++);
- ender = toCTRL(ender);
- break;
- case '0': case '1': case '2': case '3':case '4':
- case '5': case '6': case '7': case '8':case '9':
- if (*p == '0' ||
- (isDIGIT(p[1]) && atoi(p) >= RExC_npar) ) {
- I32 flags = 0;
- STRLEN numlen = 3;
- ender = grok_oct(p, &numlen, &flags, NULL);
-
- /* An octal above 0xff is interpreted differently
- * depending on if the re is in utf8 or not. If it
- * is in utf8, the value will be itself, otherwise
- * it is interpreted as modulo 0x100. It has been
- * decided to discourage the use of octal above the
- * single-byte range. For now, warn only when
- * it ends up modulo */
- if (SIZE_ONLY && ender >= 0x100
- && ! UTF && ! PL_encoding) {
- ckWARNregdep(p, "Use of octal value above 377 is deprecated");
- }
- p += numlen;
- }
- else {
- --p;
- goto loopdone;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- recode_encoding:
- {
- SV* enc = PL_encoding;
- ender = reg_recode((const char)(U8)ender, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(p, "Invalid escape in the specified encoding");
- RExC_utf8 = 1;
- }
- break;
- case '\0':
- if (p >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- if (!SIZE_ONLY&& isALPHA(*p))
- ckWARN2reg(p + 1, "Unrecognized escape \\%c passed through", UCHARAT(p));
- goto normal_default;
- }
- break;
- default:
- normal_default:
- if (UTF8_IS_START(*p) && UTF) {
- STRLEN numlen;
- ender = utf8n_to_uvchr((U8*)p, RExC_end - p,
- &numlen, UTF8_ALLOW_DEFAULT);
- p += numlen;
- }
- else
- ender = *p++;
- break;
- }
- if ( RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- if (UTF && FOLD) {
- /* Prime the casefolded buffer. */
- ender = toFOLD_uni(ender, tmpbuf, &foldlen);
- }
- if (p < RExC_end && ISMULT2(p)) { /* Back off on ?+*. */
- if (len)
- p = oldp;
- else if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- }
- else {
- len++;
- REGC((char)ender, s++);
- }
- break;
- }
- if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- len += unilen;
- s += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break;
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- len--;
- }
- else
- REGC((char)ender, s++);
- }
- loopdone:
- RExC_parse = p - 1;
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
- {
- /* len is STRLEN which is unsigned, need to copy to signed */
- IV iv = len;
- if (iv < 0)
- vFAIL("Internal disaster");
- }
- if (len > 0)
- *flagp |= HASWIDTH;
- if (len == 1 && UNI_IS_INVARIANT(ender))
- *flagp |= SIMPLE;
-
- if (SIZE_ONLY)
- RExC_size += STR_SZ(len);
- else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- }
- break;
- }
-
- return(ret);
-}
-
-STATIC char *
-S_regwhite( RExC_state_t *pRExC_state, char *p )
-{
- const char *e = RExC_end;
-
- PERL_ARGS_ASSERT_REGWHITE;
-
- while (p < e) {
- if (isSPACE(*p))
- ++p;
- else if (*p == '#') {
- bool ended = 0;
- do {
- if (*p++ == '\n') {
- ended = 1;
- break;
- }
- } while (p < e);
- if (!ended)
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- }
- else
- break;
- }
- return p;
-}
-
-/* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]].
- Character classes ([:foo:]) can also be negated ([:^foo:]).
- Returns a named class id (ANYOF_XXX) if successful, -1 otherwise.
- Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed,
- but trigger failures because they are currently unimplemented. */
-
-#define POSIXCC_DONE(c) ((c) == ':')
-#define POSIXCC_NOTYET(c) ((c) == '=' || (c) == '.')
-#define POSIXCC(c) (POSIXCC_DONE(c) || POSIXCC_NOTYET(c))
-
-STATIC I32
-S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value)
-{
- dVAR;
- I32 namedclass = OOB_NAMEDCLASS;
-
- PERL_ARGS_ASSERT_REGPPOSIXCC;
-
- if (value == '[' && RExC_parse + 1 < RExC_end &&
- /* I smell either [: or [= or [. -- POSIX has been here, right? */
- POSIXCC(UCHARAT(RExC_parse))) {
- const char c = UCHARAT(RExC_parse);
- char* const s = RExC_parse++;
-
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != c)
- RExC_parse++;
- if (RExC_parse == RExC_end)
- /* Grandfather lone [:, [=, [. */
- RExC_parse = s;
- else {
- const char* const t = RExC_parse++; /* skip over the c */
- assert(*t == c);
-
- if (UCHARAT(RExC_parse) == ']') {
- const char *posixcc = s + 1;
- RExC_parse++; /* skip over the ending ] */
-
- if (*s == ':') {
- const I32 complement = *posixcc == '^' ? *posixcc++ : 0;
- const I32 skip = t - posixcc;
-
- /* Initially switch on the length of the name. */
- switch (skip) {
- case 4:
- if (memEQ(posixcc, "word", 4)) /* this is not POSIX, this is the Perl \w */
- namedclass = complement ? ANYOF_NALNUM : ANYOF_ALNUM;
- break;
- case 5:
- /* Names all of length 5. */
- /* alnum alpha ascii blank cntrl digit graph lower
- print punct space upper */
- /* Offset 4 gives the best switch position. */
- switch (posixcc[4]) {
- case 'a':
- if (memEQ(posixcc, "alph", 4)) /* alpha */
- namedclass = complement ? ANYOF_NALPHA : ANYOF_ALPHA;
- break;
- case 'e':
- if (memEQ(posixcc, "spac", 4)) /* space */
- namedclass = complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC;
- break;
- case 'h':
- if (memEQ(posixcc, "grap", 4)) /* graph */
- namedclass = complement ? ANYOF_NGRAPH : ANYOF_GRAPH;
- break;
- case 'i':
- if (memEQ(posixcc, "asci", 4)) /* ascii */
- namedclass = complement ? ANYOF_NASCII : ANYOF_ASCII;
- break;
- case 'k':
- if (memEQ(posixcc, "blan", 4)) /* blank */
- namedclass = complement ? ANYOF_NBLANK : ANYOF_BLANK;
- break;
- case 'l':
- if (memEQ(posixcc, "cntr", 4)) /* cntrl */
- namedclass = complement ? ANYOF_NCNTRL : ANYOF_CNTRL;
- break;
- case 'm':
- if (memEQ(posixcc, "alnu", 4)) /* alnum */
- namedclass = complement ? ANYOF_NALNUMC : ANYOF_ALNUMC;
- break;
- case 'r':
- if (memEQ(posixcc, "lowe", 4)) /* lower */
- namedclass = complement ? ANYOF_NLOWER : ANYOF_LOWER;
- else if (memEQ(posixcc, "uppe", 4)) /* upper */
- namedclass = complement ? ANYOF_NUPPER : ANYOF_UPPER;
- break;
- case 't':
- if (memEQ(posixcc, "digi", 4)) /* digit */
- namedclass = complement ? ANYOF_NDIGIT : ANYOF_DIGIT;
- else if (memEQ(posixcc, "prin", 4)) /* print */
- namedclass = complement ? ANYOF_NPRINT : ANYOF_PRINT;
- else if (memEQ(posixcc, "punc", 4)) /* punct */
- namedclass = complement ? ANYOF_NPUNCT : ANYOF_PUNCT;
- break;
- }
- break;
- case 6:
- if (memEQ(posixcc, "xdigit", 6))
- namedclass = complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT;
- break;
- }
-
- if (namedclass == OOB_NAMEDCLASS)
- Simple_vFAIL3("POSIX class [:%.*s:] unknown",
- t - s - 1, s + 1);
- assert (posixcc[skip] == ':');
- assert (posixcc[skip+1] == ']');
- } else if (!SIZE_ONLY) {
- /* [[=foo=]] and [[.foo.]] are still future. */
-
- /* adjust RExC_parse so the warning shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse) != ']')
- RExC_parse++;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- } else {
- /* Maternal grandfather:
- * "[:" ending in ":" but not in ":]" */
- RExC_parse = s;
- }
- }
- }
-
- return namedclass;
-}
-
-STATIC void
-S_checkposixcc(pTHX_ RExC_state_t *pRExC_state)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_CHECKPOSIXCC;
-
- if (POSIXCC(UCHARAT(RExC_parse))) {
- const char *s = RExC_parse;
- const char c = *s++;
-
- while (isALNUM(*s))
- s++;
- if (*s && c == *s && s[1] == ']') {
- ckWARN3reg(s+2,
- "POSIX syntax [%c %c] belongs inside character classes",
- c, c);
-
- /* [[=foo=]] and [[.foo.]] are still future. */
- if (POSIXCC_NOTYET(c)) {
- /* adjust RExC_parse so the error shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse++) != ']')
- NOOP;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- }
- }
-}
-
-
-#define _C_C_T_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_N##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '!'; \
- what = WORD; \
- break
-
-#define _C_C_T_NOLOC_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '!'; \
- what = WORD; \
- break
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define POSIX_CC_UNI_NAME(CCNAME) CCNAME
-#else
-#define POSIX_CC_UNI_NAME(CCNAME) "Posix" CCNAME
-#endif
-
-/*
- parse a class specification and produce either an ANYOF node that
- matches the pattern or if the pattern matches a single char only and
- that char is < 256 and we are case insensitive then we produce an
- EXACT node instead.
-*/
-
-STATIC regnode *
-S_regclass(pTHX_ RExC_state_t *pRExC_state, U32 depth)
-{
- dVAR;
- register UV nextvalue;
- register IV prevvalue = OOB_UNICODE;
- register IV range = 0;
- UV value = 0; /* XXX:dmq: needs to be referenceable (unfortunately) */
- register regnode *ret;
- STRLEN numlen;
- IV namedclass;
- char *rangebegin = NULL;
- bool need_class = 0;
- SV *listsv = NULL;
- UV n;
- bool optimize_invert = TRUE;
- AV* unicode_alternate = NULL;
-#ifdef EBCDIC
- UV literal_endpoint = 0;
-#endif
- UV stored = 0; /* number of chars stored in the class */
-
- regnode * const orig_emit = RExC_emit; /* Save the original RExC_emit in
- case we need to change the emitted regop to an EXACT. */
- const char * orig_parse = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCLASS;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- DEBUG_PARSE("clas");
-
- /* Assume we are going to generate an ANYOF node. */
- ret = reganode(pRExC_state, ANYOF, 0);
-
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) = 0;
-
- if (UCHARAT(RExC_parse) == '^') { /* Complement of range. */
- RExC_naughty++;
- RExC_parse++;
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) |= ANYOF_INVERT;
- }
-
- if (SIZE_ONLY) {
- RExC_size += ANYOF_SKIP;
- listsv = &PL_sv_undef; /* For code scanners: listsv always non-NULL. */
- }
- else {
- RExC_emit += ANYOF_SKIP;
- if (FOLD)
- ANYOF_FLAGS(ret) |= ANYOF_FOLD;
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_LOCALE;
- ANYOF_BITMAP_ZERO(ret);
- listsv = newSVpvs("# comment\n");
- }
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
-
- if (!SIZE_ONLY && POSIXCC(nextvalue))
- checkposixcc(pRExC_state);
-
- /* allow 1st char to be ] (allowing it to be - is dealt with later) */
- if (UCHARAT(RExC_parse) == ']')
- goto charclassloop;
-
-parseit:
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != ']') {
-
- charclassloop:
-
- namedclass = OOB_NAMEDCLASS; /* initialize as illegal */
-
- if (!range)
- rangebegin = RExC_parse;
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
- if (value == '[' && POSIXCC(nextvalue))
- namedclass = regpposixcc(pRExC_state, value);
- else if (value == '\\') {
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
- /* Some compilers cannot handle switching on 64-bit integer
- * values, therefore value cannot be an UV. Yes, this will
- * be a problem later if we want switch on Unicode.
- * A similar issue a little bit later when switching on
- * namedclass. --jhi */
- switch ((I32)value) {
- case 'w': namedclass = ANYOF_ALNUM; break;
- case 'W': namedclass = ANYOF_NALNUM; break;
- case 's': namedclass = ANYOF_SPACE; break;
- case 'S': namedclass = ANYOF_NSPACE; break;
- case 'd': namedclass = ANYOF_DIGIT; break;
- case 'D': namedclass = ANYOF_NDIGIT; break;
- case 'v': namedclass = ANYOF_VERTWS; break;
- case 'V': namedclass = ANYOF_NVERTWS; break;
- case 'h': namedclass = ANYOF_HORIZWS; break;
- case 'H': namedclass = ANYOF_NHORIZWS; break;
- case 'N': /* Handle \N{NAME} in class */
- {
- /* We only pay attention to the first char of
- multichar strings being returned. I kinda wonder
- if this makes sense as it does change the behaviour
- from earlier versions, OTOH that behaviour was broken
- as well. */
- UV v; /* value is register so we cant & it /grrr */
- if (reg_namedseq(pRExC_state, &v, NULL)) {
- goto parseit;
- }
- value= v;
- }
- break;
- case 'p':
- case 'P':
- {
- char *e;
- if (RExC_parse >= RExC_end)
- vFAIL2("Empty \\%c{}", (U8)value);
- if (*RExC_parse == '{') {
- const U8 c = (U8)value;
- e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL2("Missing right brace on \\%c{}", c);
- while (isSPACE(UCHARAT(RExC_parse)))
- RExC_parse++;
- if (e == RExC_parse)
- vFAIL2("Empty \\%c{}", c);
- n = e - RExC_parse;
- while (isSPACE(UCHARAT(RExC_parse + n - 1)))
- n--;
- }
- else {
- e = RExC_parse;
- n = 1;
- }
- if (!SIZE_ONLY) {
- if (UCHARAT(RExC_parse) == '^') {
- RExC_parse++;
- n--;
- value = value == 'p' ? 'P' : 'p'; /* toggle */
- while (isSPACE(UCHARAT(RExC_parse))) {
- RExC_parse++;
- n--;
- }
- }
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::%.*s\n",
- (value=='p' ? '+' : '!'), (int)n, RExC_parse);
- }
- RExC_parse = e + 1;
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- namedclass = ANYOF_MAX; /* no official name, but it's named */
- }
- break;
- case 'n': value = '\n'; break;
- case 'r': value = '\r'; break;
- case 't': value = '\t'; break;
- case 'f': value = '\f'; break;
- case 'b': value = '\b'; break;
- case 'e': value = ASCII_TO_NATIVE('\033');break;
- case 'a': value = ASCII_TO_NATIVE('\007');break;
- case 'x':
- if (*RExC_parse == '{') {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- char * const e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL("Missing right brace on \\x{}");
-
- numlen = e - RExC_parse;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse = e + 1;
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- numlen = 2;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- }
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- value = UCHARAT(RExC_parse++);
- value = toCTRL(value);
- break;
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 flags = 0;
- numlen = 3;
- value = grok_oct(--RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- }
- recode_encoding:
- {
- SV* enc = PL_encoding;
- value = reg_recode((const char)(U8)value, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(RExC_parse,
- "Invalid escape in the specified encoding");
- break;
- }
- default:
- if (!SIZE_ONLY && isALPHA(value))
- ckWARN2reg(RExC_parse,
- "Unrecognized escape \\%c in character class passed through",
- (int)value);
- break;
- }
- } /* end of \blah */
-#ifdef EBCDIC
- else
- literal_endpoint++;
-#endif
-
- if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */
-
- if (!SIZE_ONLY && !need_class)
- ANYOF_CLASS_ZERO(ret);
-
- need_class = 1;
-
- /* a bad range like a-\d, a-[:digit:] ? */
- if (range) {
- if (!SIZE_ONLY) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- ckWARN4reg(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
-
- if (prevvalue < 256) {
- ANYOF_BITMAP_SET(ret, prevvalue);
- ANYOF_BITMAP_SET(ret, '-');
- }
- else {
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-');
- }
- }
-
- range = 0; /* this was not a true range */
- }
-
-
-
- if (!SIZE_ONLY) {
- const char *what = NULL;
- char yesno = 0;
-
- if (namedclass > OOB_NAMEDCLASS)
- optimize_invert = FALSE;
- /* Possible truncation here but in some 64-bit environments
- * the compiler gets heartburn about switch on 64-bit values.
- * A similar issue a little earlier when switching on value.
- * --jhi */
- switch ((I32)namedclass) {
-
- case _C_C_T_(ALNUMC, isALNUMC(value), POSIX_CC_UNI_NAME("Alnum"));
- case _C_C_T_(ALPHA, isALPHA(value), POSIX_CC_UNI_NAME("Alpha"));
- case _C_C_T_(BLANK, isBLANK(value), POSIX_CC_UNI_NAME("Blank"));
- case _C_C_T_(CNTRL, isCNTRL(value), POSIX_CC_UNI_NAME("Cntrl"));
- case _C_C_T_(GRAPH, isGRAPH(value), POSIX_CC_UNI_NAME("Graph"));
- case _C_C_T_(LOWER, isLOWER(value), POSIX_CC_UNI_NAME("Lower"));
- case _C_C_T_(PRINT, isPRINT(value), POSIX_CC_UNI_NAME("Print"));
- case _C_C_T_(PSXSPC, isPSXSPC(value), POSIX_CC_UNI_NAME("Space"));
- case _C_C_T_(PUNCT, isPUNCT(value), POSIX_CC_UNI_NAME("Punct"));
- case _C_C_T_(UPPER, isUPPER(value), POSIX_CC_UNI_NAME("Upper"));
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
- case _C_C_T_(ALNUM, isALNUM(value), "Word");
- case _C_C_T_(SPACE, isSPACE(value), "SpacePerl");
-#else
- case _C_C_T_(SPACE, isSPACE(value), "PerlSpace");
- case _C_C_T_(ALNUM, isALNUM(value), "PerlWord");
-#endif
- case _C_C_T_(XDIGIT, isXDIGIT(value), "XDigit");
- case _C_C_T_NOLOC_(VERTWS, is_VERTWS_latin1(&value), "VertSpace");
- case _C_C_T_NOLOC_(HORIZWS, is_HORIZWS_latin1(&value), "HorizSpace");
- case ANYOF_ASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_ASCII);
- else {
-#ifndef EBCDIC
- for (value = 0; value < 128; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '+';
- what = "ASCII";
- break;
- case ANYOF_NASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NASCII);
- else {
-#ifndef EBCDIC
- for (value = 128; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (!isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '!';
- what = "ASCII";
- break;
- case ANYOF_DIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_DIGIT);
- else {
- /* consecutive digits assumed */
- for (value = '0'; value <= '9'; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '+';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_NDIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NDIGIT);
- else {
- /* consecutive digits assumed */
- for (value = 0; value < '0'; value++)
- ANYOF_BITMAP_SET(ret, value);
- for (value = '9' + 1; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '!';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_MAX:
- /* this is to handle \p and \P */
- break;
- default:
- vFAIL("Invalid [::] class");
- break;
- }
- if (what) {
- /* Strings such as "+utf8::isWord\n" */
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::Is%s\n", yesno, what);
- }
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_CLASS;
- continue;
- }
- } /* end of namedclass \blah */
-
- if (range) {
- if (prevvalue > (IV)value) /* b-a */ {
- const int w = RExC_parse - rangebegin;
- Simple_vFAIL4("Invalid [] range \"%*.*s\"", w, w, rangebegin);
- range = 0; /* not a valid range */
- }
- }
- else {
- prevvalue = value; /* save the beginning of the range */
- if (*RExC_parse == '-' && RExC_parse+1 < RExC_end &&
- RExC_parse[1] != ']') {
- RExC_parse++;
-
- /* a bad range like \w-, [:word:]- ? */
- if (namedclass > OOB_NAMEDCLASS) {
- if (ckWARN(WARN_REGEXP)) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- vWARN4(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
- }
- if (!SIZE_ONLY)
- ANYOF_BITMAP_SET(ret, '-');
- } else
- range = 1; /* yeah, it's a range! */
- continue; /* but do it the next time */
- }
- }
-
- /* now is the next time */
- /*stored += (value - prevvalue + 1);*/
- if (!SIZE_ONLY) {
- if (prevvalue < 256) {
- const IV ceilvalue = value < 256 ? value : 255;
- IV i;
-#ifdef EBCDIC
- /* In EBCDIC [\x89-\x91] should include
- * the \x8e but [i-j] should not. */
- if (literal_endpoint == 2 &&
- ((isLOWER(prevvalue) && isLOWER(ceilvalue)) ||
- (isUPPER(prevvalue) && isUPPER(ceilvalue))))
- {
- if (isLOWER(prevvalue)) {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isLOWER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- } else {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isUPPER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- else
-#endif
- for (i = prevvalue; i <= ceilvalue; i++) {
- if (!ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- if (value > 255 || UTF) {
- const UV prevnatvalue = NATIVE_TO_UNI(prevvalue);
- const UV natvalue = NATIVE_TO_UNI(value);
- stored+=2; /* can't optimize this class */
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- if (prevnatvalue < natvalue) { /* what about > ? */
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n",
- prevnatvalue, natvalue);
- }
- else if (prevnatvalue == natvalue) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", natvalue);
- if (FOLD) {
- U8 foldbuf[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const UV f = to_uni_fold(natvalue, foldbuf, &foldlen);
-
-#ifdef EBCDIC /* RD t/uni/fold ff and 6b */
- if (RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xDF || f == 0x92)) {
- f = NATIVE_TO_UNI(f);
- }
-#endif
- /* If folding and foldable and a single
- * character, insert also the folded version
- * to the charclass. */
- if (f != value) {
-#ifdef EBCDIC /* RD tunifold ligatures s,t fb05, fb06 */
- if ((RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xA2 &&
- (value == 0xFB05 || value == 0xFB06))) ?
- foldlen == ((STRLEN)UNISKIP(f) - 1) :
- foldlen == (STRLEN)UNISKIP(f) )
-#else
- if (foldlen == (STRLEN)UNISKIP(f))
-#endif
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n", f);
- else {
- /* Any multicharacter foldings
- * require the following transform:
- * [ABCDEF] -> (?:[ABCabcDEFd]|pq|rst)
- * where E folds into "pq" and F folds
- * into "rst", all other characters
- * fold to single characters. We save
- * away these multicharacter foldings,
- * to be later saved as part of the
- * additional "s" data. */
- SV *sv;
-
- if (!unicode_alternate)
- unicode_alternate = newAV();
- sv = newSVpvn_utf8((char*)foldbuf, foldlen,
- TRUE);
- av_push(unicode_alternate, sv);
- }
- }
-
- /* If folding and the value is one of the Greek
- * sigmas insert a few more sigmas to make the
- * folding rules of the sigmas to work right.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (literal or EXACTF cases) are handled
- * during runtime in regexec.c:S_find_byclass(). */
- if (value == UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA);
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- else if (value == UNICODE_GREEK_CAPITAL_LETTER_SIGMA)
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- }
- }
-#ifdef EBCDIC
- literal_endpoint = 0;
-#endif
- }
-
- range = 0; /* this range (if it was one) is done now */
- }
-
- if (need_class) {
- ANYOF_FLAGS(ret) |= ANYOF_LARGE;
- if (SIZE_ONLY)
- RExC_size += ANYOF_CLASS_ADD_SKIP;
- else
- RExC_emit += ANYOF_CLASS_ADD_SKIP;
- }
-
-
- if (SIZE_ONLY)
- return ret;
- /****** !SIZE_ONLY AFTER HERE *********/
-
- if( stored == 1 && (value < 128 || (value < 256 && !UTF))
- && !( ANYOF_FLAGS(ret) & ( ANYOF_FLAGS_ALL ^ ANYOF_FOLD ) )
- ) {
- /* optimize single char class to an EXACT node
- but *only* when its not a UTF/high char */
- const char * cur_parse= RExC_parse;
- RExC_emit = (regnode *)orig_emit;
- RExC_parse = (char *)orig_parse;
- ret = reg_node(pRExC_state,
- (U8)((ANYOF_FLAGS(ret) & ANYOF_FOLD) ? EXACTF : EXACT));
- RExC_parse = (char *)cur_parse;
- *STRING(ret)= (char)value;
- STR_LEN(ret)= 1;
- RExC_emit += STR_SZ(1);
- SvREFCNT_dec(listsv);
- return ret;
- }
- /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */
- if ( /* If the only flag is folding (plus possibly inversion). */
- ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD)
- ) {
- for (value = 0; value < 256; ++value) {
- if (ANYOF_BITMAP_TEST(ret, value)) {
- UV fold = PL_fold[value];
-
- if (fold != value)
- ANYOF_BITMAP_SET(ret, fold);
- }
- }
- ANYOF_FLAGS(ret) &= ~ANYOF_FOLD;
- }
-
- /* optimize inverted simple patterns (e.g. [^a-z]) */
- if (optimize_invert &&
- /* If the only flag is inversion. */
- (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) {
- for (value = 0; value < ANYOF_BITMAP_SIZE; ++value)
- ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL;
- ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL;
- }
- {
- AV * const av = newAV();
- SV *rv;
- /* The 0th element stores the character class description
- * in its textual form: used later (regexec.c:Perl_regclass_swash())
- * to initialize the appropriate swash (which gets stored in
- * the 1st element), and also useful for dumping the regnode.
- * The 2nd element stores the multicharacter foldings,
- * used later (regexec.c:S_reginclass()). */
- av_store(av, 0, listsv);
- av_store(av, 1, NULL);
- av_store(av, 2, MUTABLE_SV(unicode_alternate));
- rv = newRV_noinc(MUTABLE_SV(av));
- n = add_data(pRExC_state, 1, "s");
- RExC_rxi->data->data[n] = (void*)rv;
- ARG_SET(ret, n);
- }
- return ret;
-}
-#undef _C_C_T_
-
-
-/* reg_skipcomment()
-
- Absorbs an /x style # comments from the input stream.
- Returns true if there is more text remaining in the stream.
- Will set the REG_SEEN_RUN_ON_COMMENT flag if the comment
- terminates the pattern without including a newline.
-
- Note its the callers responsibility to ensure that we are
- actually in /x mode
-
-*/
-
-STATIC bool
-S_reg_skipcomment(pTHX_ RExC_state_t *pRExC_state)
-{
- bool ended = 0;
-
- PERL_ARGS_ASSERT_REG_SKIPCOMMENT;
-
- while (RExC_parse < RExC_end)
- if (*RExC_parse++ == '\n') {
- ended = 1;
- break;
- }
- if (!ended) {
- /* we ran off the end of the pattern without ending
- the comment, so we have to add an \n when wrapping */
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- return 0;
- } else
- return 1;
-}
-
-/* nextchar()
-
- Advance that parse position, and optionall absorbs
- "whitespace" from the inputstream.
-
- Without /x "whitespace" means (?#...) style comments only,
- with /x this means (?#...) and # comments and whitespace proper.
-
- Returns the RExC_parse point from BEFORE the scan occurs.
-
- This is the /x friendly way of saying RExC_parse++.
-*/
-
-STATIC char*
-S_nextchar(pTHX_ RExC_state_t *pRExC_state)
-{
- char* const retval = RExC_parse++;
-
- PERL_ARGS_ASSERT_NEXTCHAR;
-
- for (;;) {
- if (*RExC_parse == '(' && RExC_parse[1] == '?' &&
- RExC_parse[2] == '#') {
- while (*RExC_parse != ')') {
- if (RExC_parse == RExC_end)
- FAIL("Sequence (?#... not terminated");
- RExC_parse++;
- }
- RExC_parse++;
- continue;
- }
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if (isSPACE(*RExC_parse)) {
- RExC_parse++;
- continue;
- }
- else if (*RExC_parse == '#') {
- if ( reg_skipcomment( pRExC_state ) )
- continue;
- }
- }
- return retval;
- }
-}
-
-/*
-- reg_node - emit a node
-*/
-STATIC regnode * /* Location. */
-S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 1;
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE(ptr, op);
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, (ptr) - 1);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s:%d: (op %s) %s %"UVuf" (len %"UVuf") (max %"UVuf").\n",
- "reg_node", __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(RExC_emit, RExC_parse + (op == END));
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reganode - emit a node with an argument
-*/
-STATIC regnode * /* Location. */
-S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGANODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 2;
- /*
- We can't do this:
-
- assert(2==regarglen[op]+1);
-
- Anything larger than this has to allocate the extra amount.
- If we changed this to be:
-
- RExC_size += (1 + regarglen[op]);
-
- then it wouldn't matter. Its not clear what side effect
- might come from that so its not done so far.
- -- dmq
- */
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE_ARG(ptr, op, arg);
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, (ptr) - 2);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reganode",
- __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] ?
- "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Cur_Node_Offset;
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reguni - emit (if appropriate) a Unicode character
-*/
-STATIC STRLEN
-S_reguni(pTHX_ const RExC_state_t *pRExC_state, UV uv, char* s)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGUNI;
-
- return SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s);
-}
-
-/*
-- reginsert - insert an operator in front of already-emitted operand
-*
-* Means relocating the operand.
-*/
-STATIC void
-S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd, U32 depth)
-{
- dVAR;
- register regnode *src;
- register regnode *dst;
- register regnode *place;
- const int offset = regarglen[(U8)op];
- const int size = NODE_STEP_REGNODE + offset;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGINSERT;
- PERL_UNUSED_ARG(depth);
-/* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */
- DEBUG_PARSE_FMT("inst"," - %s",PL_reg_name[op]);
- if (SIZE_ONLY) {
- RExC_size += size;
- return;
- }
-
- src = RExC_emit;
- RExC_emit += size;
- dst = RExC_emit;
- if (RExC_open_parens) {
- int paren;
- /*DEBUG_PARSE_FMT("inst"," - %"IVdf, (IV)RExC_npar);*/
- for ( paren=0 ; paren < RExC_npar ; paren++ ) {
- if ( RExC_open_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("open"," - %d",size);*/
- RExC_open_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("open"," - %s","ok");*/
- }
- if ( RExC_close_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("close"," - %d",size);*/
- RExC_close_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("close"," - %s","ok");*/
- }
- }
- }
-
- while (src > opnd) {
- StructCopy(--src, --dst, regnode);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD 20010112 */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s copy %"UVuf" -> %"UVuf" (max %"UVuf").\n",
- "reg_insert",
- __LINE__,
- PL_reg_name[op],
- (UV)(dst - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(src - RExC_emit_start),
- (UV)(dst - RExC_emit_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src));
- Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src));
- }
-#endif
- }
-
-
- place = opnd; /* Op node, where operand used to be. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reginsert",
- __LINE__,
- PL_reg_name[op],
- (UV)(place - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(place - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(place, RExC_parse);
- Set_Node_Length(place, 1);
- }
-#endif
- src = NEXTOPER(place);
- FILL_ADVANCE_NODE(place, op);
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, (place) - 1);
- Zero(src, offset, regnode);
-}
-
-/*
-- regtail - set the next-pointer at the end of a node chain of p to val.
-- SEE ALSO: regtail_study
-*/
-/* TODO: All three parms should be const */
-STATIC void
-S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- if (SIZE_ONLY)
- return;
-
- /* Find last node. */
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tail" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) %s %s\n",
- SvPV_nolen_const(mysv), REG_NODE_NUM(scan),
- (temp == NULL ? "->" : ""),
- (temp == NULL ? PL_reg_name[OP(val)] : "")
- );
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
-
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-}
-
-#ifdef DEBUGGING
-/*
-- regtail_study - set the next-pointer at the end of a node chain of p to val.
-- Look for optimizable sequences at the same time.
-- currently only looks for EXACT chains.
-
-This is expermental code. The idea is to use this routine to perform
-in place optimizations on branches and groups as they are constructed,
-with the long term intention of removing optimization from study_chunk so
-that it is purely analytical.
-
-Currently only used when in DEBUG mode. The macro REGTAIL_STUDY() is used
-to control which is which.
-
-*/
-/* TODO: All four parms should be const */
-
-STATIC U8
-S_regtail_study(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- U8 exact = PSEUDO;
-#ifdef EXPERIMENTAL_INPLACESCAN
- I32 min = 0;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL_STUDY;
-
-
- if (SIZE_ONLY)
- return exact;
-
- /* Find last node. */
-
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (PL_regkind[OP(scan)] == EXACT)
- if (join_exact(pRExC_state,scan,&min,1,val,depth+1))
- return EXACT;
-#endif
- if ( exact ) {
- switch (OP(scan)) {
- case EXACT:
- case EXACTF:
- case EXACTFL:
- if( exact == PSEUDO )
- exact= OP(scan);
- else if ( exact != OP(scan) )
- exact= 0;
- case NOTHING:
- break;
- default:
- exact= 0;
- }
- }
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tsdy" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) -> %s\n",
- SvPV_nolen_const(mysv),
- REG_NODE_NUM(scan),
- PL_reg_name[exact]);
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
- DEBUG_PARSE_r({
- SV * const mysv_val=sv_newmortal();
- DEBUG_PARSE_MSG("");
- regprop(RExC_rx, mysv_val, val);
- PerlIO_printf(Perl_debug_log, "~ attach to %s (%"IVdf") offset to %"IVdf"\n",
- SvPV_nolen_const(mysv_val),
- (IV)REG_NODE_NUM(val),
- (IV)(val - scan)
- );
- });
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-
- return exact;
-}
-#endif
-
-/*
- - regcurly - a little FSA that accepts {\d+,?\d*}
- */
-STATIC I32
-S_regcurly(register const char *s)
-{
- PERL_ARGS_ASSERT_REGCURLY;
-
- if (*s++ != '{')
- return FALSE;
- if (!isDIGIT(*s))
- return FALSE;
- while (isDIGIT(*s))
- s++;
- if (*s == ',')
- s++;
- while (isDIGIT(*s))
- s++;
- if (*s != '}')
- return FALSE;
- return TRUE;
-}
-
-
-/*
- - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form
- */
-#ifdef DEBUGGING
-static void
-S_regdump_extflags(pTHX_ const char *lead, const U32 flags)
-{
- int bit;
- int set=0;
-
- for (bit=0; bit<32; bit++) {
- if (flags & (1<<bit)) {
- if (!set++ && lead)
- PerlIO_printf(Perl_debug_log, "%s",lead);
- PerlIO_printf(Perl_debug_log, "%s ",PL_reg_extflags_name[bit]);
- }
- }
- if (lead) {
- if (set)
- PerlIO_printf(Perl_debug_log, "\n");
- else
- PerlIO_printf(Perl_debug_log, "%s[none-set]\n",lead);
- }
-}
-#endif
-
-void
-Perl_regdump(pTHX_ const regexp *r)
-{
-#ifdef DEBUGGING
- dVAR;
- SV * const sv = sv_newmortal();
- SV *dsv= sv_newmortal();
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGDUMP;
-
- (void)dumpuntil(r, ri->program, ri->program + 1, NULL, NULL, sv, 0, 0);
-
- /* Header fields of interest. */
- if (r->anchored_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->anchored_substr),
- RE_SV_DUMPLEN(r->anchored_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_substr),
- (IV)r->anchored_offset);
- } else if (r->anchored_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->anchored_utf8),
- RE_SV_DUMPLEN(r->anchored_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored utf8 %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_utf8),
- (IV)r->anchored_offset);
- }
- if (r->float_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->float_substr),
- RE_SV_DUMPLEN(r->float_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "floating %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_substr),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- } else if (r->float_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->float_utf8),
- RE_SV_DUMPLEN(r->float_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "floating utf8 %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_utf8),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- }
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log,
- (const char *)
- (r->check_substr == r->float_substr
- && r->check_utf8 == r->float_utf8
- ? "(checking floating" : "(checking anchored"));
- if (r->extflags & RXf_NOSCAN)
- PerlIO_printf(Perl_debug_log, " noscan");
- if (r->extflags & RXf_CHECK_ALL)
- PerlIO_printf(Perl_debug_log, " isall");
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log, ") ");
-
- if (ri->regstclass) {
- regprop(r, sv, ri->regstclass);
- PerlIO_printf(Perl_debug_log, "stclass %s ", SvPVX_const(sv));
- }
- if (r->extflags & RXf_ANCH) {
- PerlIO_printf(Perl_debug_log, "anchored");
- if (r->extflags & RXf_ANCH_BOL)
- PerlIO_printf(Perl_debug_log, "(BOL)");
- if (r->extflags & RXf_ANCH_MBOL)
- PerlIO_printf(Perl_debug_log, "(MBOL)");
- if (r->extflags & RXf_ANCH_SBOL)
- PerlIO_printf(Perl_debug_log, "(SBOL)");
- if (r->extflags & RXf_ANCH_GPOS)
- PerlIO_printf(Perl_debug_log, "(GPOS)");
- PerlIO_putc(Perl_debug_log, ' ');
- }
- if (r->extflags & RXf_GPOS_SEEN)
- PerlIO_printf(Perl_debug_log, "GPOS:%"UVuf" ", (UV)r->gofs);
- if (r->intflags & PREGf_SKIP)
- PerlIO_printf(Perl_debug_log, "plus ");
- if (r->intflags & PREGf_IMPLICIT)
- PerlIO_printf(Perl_debug_log, "implicit ");
- PerlIO_printf(Perl_debug_log, "minlen %"IVdf" ", (IV)r->minlen);
- if (r->extflags & RXf_EVAL_SEEN)
- PerlIO_printf(Perl_debug_log, "with eval ");
- PerlIO_printf(Perl_debug_log, "\n");
- DEBUG_FLAGS_r(regdump_extflags("r->extflags: ",r->extflags));
-#else
- PERL_ARGS_ASSERT_REGDUMP;
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(r);
-#endif /* DEBUGGING */
-}
-
-/*
-- regprop - printable representation of opcode
-*/
-#define EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags) \
-STMT_START { \
- if (do_sep) { \
- Perl_sv_catpvf(aTHX_ sv,"%s][%s",PL_colors[1],PL_colors[0]); \
- if (flags & ANYOF_INVERT) \
- /*make sure the invert info is in each */ \
- sv_catpvs(sv, "^"); \
- do_sep = 0; \
- } \
-} STMT_END
-
-void
-Perl_regprop(pTHX_ const regexp *prog, SV *sv, const regnode *o)
-{
-#ifdef DEBUGGING
- dVAR;
- register int k;
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPROP;
-
- sv_setpvs(sv, "");
-
- if (OP(o) > REGNODE_MAX) /* regnode.type is unsigned */
- /* It would be nice to FAIL() here, but this may be called from
- regexec.c, and it would be hard to supply pRExC_state. */
- Perl_croak(aTHX_ "Corrupted regexp opcode %d > %d", (int)OP(o), (int)REGNODE_MAX);
- sv_catpv(sv, PL_reg_name[OP(o)]); /* Take off const! */
-
- k = PL_regkind[OP(o)];
-
- if (k == EXACT) {
- sv_catpvs(sv, " ");
- /* Using is_utf8_string() (via PERL_PV_UNI_DETECT)
- * is a crude hack but it may be the best for now since
- * we have no flag "this EXACTish node was UTF-8"
- * --jhi */
- pv_pretty(sv, STRING(o), STR_LEN(o), 60, PL_colors[0], PL_colors[1],
- PERL_PV_ESCAPE_UNI_DETECT |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT |
- PERL_PV_PRETTY_NOCLEAR
- );
- } else if (k == TRIE) {
- /* print the details of the trie in dumpuntil instead, as
- * progi->data isn't available here */
- const char op = OP(o);
- const U32 n = ARG(o);
- const reg_ac_data * const ac = IS_TRIE_AC(op) ?
- (reg_ac_data *)progi->data->data[n] :
- NULL;
- const reg_trie_data * const trie
- = (reg_trie_data*)progi->data->data[!IS_TRIE_AC(op) ? n : ac->trie];
-
- Perl_sv_catpvf(aTHX_ sv, "-%s",PL_reg_name[o->flags]);
- DEBUG_TRIE_COMPILE_r(
- Perl_sv_catpvf(aTHX_ sv,
- "<S:%"UVuf"/%"IVdf" W:%"UVuf" L:%"UVuf"/%"UVuf" C:%"UVuf"/%"UVuf">",
- (UV)trie->startstate,
- (IV)trie->statecount-1, /* -1 because of the unused 0 element */
- (UV)trie->wordcount,
- (UV)trie->minlen,
- (UV)trie->maxlen,
- (UV)TRIE_CHARCOUNT(trie),
- (UV)trie->uniquecharcount
- )
- );
- if ( IS_ANYOF_TRIE(op) || trie->bitmap ) {
- int i;
- int rangestart = -1;
- U8* bitmap = IS_ANYOF_TRIE(op) ? (U8*)ANYOF_BITMAP(o) : (U8*)TRIE_BITMAP(trie);
- sv_catpvs(sv, "[");
- for (i = 0; i <= 256; i++) {
- if (i < 256 && BITMAP_TEST(bitmap,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- rangestart = -1;
- }
- }
- sv_catpvs(sv, "]");
- }
-
- } else if (k == CURLY) {
- if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */
- Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o));
- }
- else if (k == WHILEM && o->flags) /* Ordinal/of */
- Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4);
- else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP || OP(o)==ACCEPT) {
- Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */
- if ( RXp_PAREN_NAMES(prog) ) {
- if ( k != REF || OP(o) < NREF) {
- AV *list= MUTABLE_AV(progi->data->data[progi->name_list_idx]);
- SV **name= av_fetch(list, ARG(o), 0 );
- if (name)
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- else {
- AV *list= MUTABLE_AV(progi->data->data[ progi->name_list_idx ]);
- SV *sv_dat= MUTABLE_SV(progi->data->data[ ARG( o ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
- SV **name= av_fetch(list, nums[0], 0 );
- I32 n;
- if (name) {
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- Perl_sv_catpvf(aTHX_ sv, "%s%"IVdf,
- (n ? "," : ""), (IV)nums[n]);
- }
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- }
- }
- } else if (k == GOSUB)
- Perl_sv_catpvf(aTHX_ sv, "%d[%+d]", (int)ARG(o),(int)ARG2L(o)); /* Paren and offset */
- else if (k == VERB) {
- if (!o->flags)
- Perl_sv_catpvf(aTHX_ sv, ":%"SVf,
- SVfARG((MUTABLE_SV(progi->data->data[ ARG( o ) ]))));
- } else if (k == LOGICAL)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */
- else if (k == FOLDCHAR)
- Perl_sv_catpvf(aTHX_ sv, "[0x%"UVXf"]", PTR2UV(ARG(o)) );
- else if (k == ANYOF) {
- int i, rangestart = -1;
- const U8 flags = ANYOF_FLAGS(o);
- int do_sep = 0;
-
- /* Should be synchronized with * ANYOF_ #xdefines in regcomp.h */
- static const char * const anyofs[] = {
- "\\w",
- "\\W",
- "\\s",
- "\\S",
- "\\d",
- "\\D",
- "[:alnum:]",
- "[:^alnum:]",
- "[:alpha:]",
- "[:^alpha:]",
- "[:ascii:]",
- "[:^ascii:]",
- "[:cntrl:]",
- "[:^cntrl:]",
- "[:graph:]",
- "[:^graph:]",
- "[:lower:]",
- "[:^lower:]",
- "[:print:]",
- "[:^print:]",
- "[:punct:]",
- "[:^punct:]",
- "[:upper:]",
- "[:^upper:]",
- "[:xdigit:]",
- "[:^xdigit:]",
- "[:space:]",
- "[:^space:]",
- "[:blank:]",
- "[:^blank:]"
- };
-
- if (flags & ANYOF_LOCALE)
- sv_catpvs(sv, "{loc}");
- if (flags & ANYOF_FOLD)
- sv_catpvs(sv, "{i}");
- Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]);
- if (flags & ANYOF_INVERT)
- sv_catpvs(sv, "^");
-
- /* output what the standard cp 0-255 bitmap matches */
- for (i = 0; i <= 256; i++) {
- if (i < 256 && ANYOF_BITMAP_TEST(o,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- do_sep = 1;
- rangestart = -1;
- }
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
- /* output any special charclass tests (used mostly under use locale) */
- if (o->flags & ANYOF_CLASS)
- for (i = 0; i < (int)(sizeof(anyofs)/sizeof(char*)); i++)
- if (ANYOF_CLASS_TEST(o,i)) {
- sv_catpv(sv, anyofs[i]);
- do_sep = 1;
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
-
- /* output information about the unicode matching */
- if (flags & ANYOF_UNICODE)
- sv_catpvs(sv, "{unicode}");
- else if (flags & ANYOF_UNICODE_ALL)
- sv_catpvs(sv, "{unicode_all}");
-
- {
- SV *lv;
- SV * const sw = regclass_swash(prog, o, FALSE, &lv, 0);
-
- if (lv) {
- if (sw) {
- U8 s[UTF8_MAXBYTES_CASE+1];
-
- for (i = 0; i <= 256; i++) { /* just the first 256 */
- uvchr_to_utf8(s, i);
-
- if (i < 256 && swash_fetch(sw, s, TRUE)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++) {
- const U8 * const e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for(p = s; p < e; p++)
- put_byte(sv, *p);
- }
- else {
- const U8 *e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- sv_catpvs(sv, "-");
- e = uvchr_to_utf8(s, i-1);
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- }
- rangestart = -1;
- }
- }
-
- sv_catpvs(sv, "..."); /* et cetera */
- }
-
- {
- char *s = savesvpv(lv);
- char * const origs = s;
-
- while (*s && *s != '\n')
- s++;
-
- if (*s == '\n') {
- const char * const t = ++s;
-
- while (*s) {
- if (*s == '\n')
- *s = ' ';
- s++;
- }
- if (s[-1] == ' ')
- s[-1] = 0;
-
- sv_catpv(sv, t);
- }
-
- Safefree(origs);
- }
- }
- }
-
- Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]);
- }
- else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH))
- Perl_sv_catpvf(aTHX_ sv, "[%d]", -(o->flags));
-#else
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(sv);
- PERL_UNUSED_ARG(o);
- PERL_UNUSED_ARG(prog);
-#endif /* DEBUGGING */
-}
-
-SV *
-Perl_re_intuit_string(pTHX_ REGEXP * const r)
-{ /* Assume that RE_INTUIT is set */
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_STRING;
- PERL_UNUSED_CONTEXT;
-
- DEBUG_COMPILE_r(
- {
- const char * const s = SvPV_nolen_const(prog->check_substr
- ? prog->check_substr : prog->check_utf8);
-
- if (!PL_colorset) reginitcolors();
- PerlIO_printf(Perl_debug_log,
- "%sUsing REx %ssubstr:%s \"%s%.60s%s%s\"\n",
- PL_colors[4],
- prog->check_substr ? "" : "utf8 ",
- PL_colors[5],PL_colors[0],
- s,
- PL_colors[1],
- (strlen(s) > 60 ? "..." : ""));
- } );
-
- return prog->check_substr ? prog->check_substr : prog->check_utf8;
-}
-
-/*
- pregfree()
-
- handles refcounting and freeing the perl core regexp structure. When
- it is necessary to actually free the structure the first thing it
- does is call the 'free' method of the regexp_engine associated to to
- the regexp, allowing the handling of the void *pprivate; member
- first. (This routine is not overridable by extensions, which is why
- the extensions free is called first.)
-
- See regdupe and regdupe_internal if you change anything here.
-*/
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_pregfree(pTHX_ REGEXP *r)
-{
- SvREFCNT_dec(r);
-}
-
-void
-Perl_pregfree2(pTHX_ REGEXP *rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_PREGFREE2;
-
- if (r->mother_re) {
- ReREFCNT_dec(r->mother_re);
- } else {
- CALLREGFREE_PVT(rx); /* free the private data */
- SvREFCNT_dec(RXp_PAREN_NAMES(r));
- }
- if (r->substrs) {
- SvREFCNT_dec(r->anchored_substr);
- SvREFCNT_dec(r->anchored_utf8);
- SvREFCNT_dec(r->float_substr);
- SvREFCNT_dec(r->float_utf8);
- Safefree(r->substrs);
- }
- RX_MATCH_COPY_FREE(rx);
-#ifdef PERL_OLD_COPY_ON_WRITE
- SvREFCNT_dec(r->saved_copy);
-#endif
- Safefree(r->offs);
-}
-
-/* reg_temp_copy()
-
- This is a hacky workaround to the structural issue of match results
- being stored in the regexp structure which is in turn stored in
- PL_curpm/PL_reg_curpm. The problem is that due to qr// the pattern
- could be PL_curpm in multiple contexts, and could require multiple
- result sets being associated with the pattern simultaneously, such
- as when doing a recursive match with (??{$qr})
-
- The solution is to make a lightweight copy of the regexp structure
- when a qr// is returned from the code executed by (??{$qr}) this
- lightweight copy doesnt actually own any of its data except for
- the starp/end and the actual regexp structure itself.
-
-*/
-
-
-REGEXP *
-Perl_reg_temp_copy (pTHX_ REGEXP *ret_x, REGEXP *rx)
-{
- struct regexp *ret;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- register const I32 npar = r->nparens+1;
-
- PERL_ARGS_ASSERT_REG_TEMP_COPY;
-
- if (!ret_x)
- ret_x = (REGEXP*) newSV_type(SVt_REGEXP);
- ret = (struct regexp *)SvANY(ret_x);
-
- (void)ReREFCNT_inc(rx);
- /* We can take advantage of the existing "copied buffer" mechanism in SVs
- by pointing directly at the buffer, but flagging that the allocated
- space in the copy is zero. As we've just done a struct copy, it's now
- a case of zero-ing that, rather than copying the current length. */
- SvPV_set(ret_x, RX_WRAPPED(rx));
- SvFLAGS(ret_x) |= SvFLAGS(rx) & (SVf_POK|SVp_POK|SVf_UTF8);
- memcpy(&(ret->xpv_cur), &(r->xpv_cur),
- sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur));
- SvLEN_set(ret_x, 0);
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if (r->substrs) {
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- SvREFCNT_inc_void(ret->anchored_substr);
- SvREFCNT_inc_void(ret->anchored_utf8);
- SvREFCNT_inc_void(ret->float_substr);
- SvREFCNT_inc_void(ret->float_utf8);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
- }
- RX_MATCH_COPIED_off(ret_x);
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
- ret->mother_re = rx;
-
- return ret_x;
-}
-#endif
-
-/* regfree_internal()
-
- Free the private data in a regexp. This is overloadable by
- extensions. Perl takes care of the regexp structure in pregfree(),
- this covers the *pprivate pointer which technically perldoesnt
- know about, however of course we have to handle the
- regexp_internal structure when no extension is in use.
-
- Note this is called before freeing anything in the regexp
- structure.
- */
-
-void
-Perl_regfree_internal(pTHX_ REGEXP * const rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGFREE_INTERNAL;
-
- DEBUG_COMPILE_r({
- if (!PL_colorset)
- reginitcolors();
- {
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RX_UTF8(rx),
- dsv, RX_PRECOMP(rx), RX_PRELEN(rx), 60);
- PerlIO_printf(Perl_debug_log,"%sFreeing REx:%s %s\n",
- PL_colors[4],PL_colors[5],s);
- }
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets)
- Safefree(ri->u.offsets); /* 20010421 MJD */
-#endif
- if (ri->data) {
- int n = ri->data->count;
- PAD* new_comppad = NULL;
- PAD* old_comppad;
- PADOFFSET refcnt;
-
- while (--n >= 0) {
- /* If you add a ->what type here, update the comment in regcomp.h */
- switch (ri->data->what[n]) {
- case 's':
- case 'S':
- case 'u':
- SvREFCNT_dec(MUTABLE_SV(ri->data->data[n]));
- break;
- case 'f':
- Safefree(ri->data->data[n]);
- break;
- case 'p':
- new_comppad = MUTABLE_AV(ri->data->data[n]);
- break;
- case 'o':
- if (new_comppad == NULL)
- Perl_croak(aTHX_ "panic: pregfree comppad");
- PAD_SAVE_LOCAL(old_comppad,
- /* Watch out for global destruction's random ordering. */
- (SvTYPE(new_comppad) == SVt_PVAV) ? new_comppad : NULL
- );
- OP_REFCNT_LOCK;
- refcnt = OpREFCNT_dec((OP_4tree*)ri->data->data[n]);
- OP_REFCNT_UNLOCK;
- if (!refcnt)
- op_free((OP_4tree*)ri->data->data[n]);
-
- PAD_RESTORE_LOCAL(old_comppad);
- SvREFCNT_dec(MUTABLE_SV(new_comppad));
- new_comppad = NULL;
- break;
- case 'n':
- break;
- case 'T':
- { /* Aho Corasick add-on structure for a trie node.
- Used in stclass optimization only */
- U32 refcount;
- reg_ac_data *aho=(reg_ac_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --aho->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(aho->states);
- PerlMemShared_free(aho->fail);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- PerlMemShared_free(ri->regstclass);
- }
- }
- break;
- case 't':
- {
- /* trie structure. */
- U32 refcount;
- reg_trie_data *trie=(reg_trie_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --trie->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(trie->charmap);
- PerlMemShared_free(trie->states);
- PerlMemShared_free(trie->trans);
- if (trie->bitmap)
- PerlMemShared_free(trie->bitmap);
- if (trie->wordlen)
- PerlMemShared_free(trie->wordlen);
- if (trie->jump)
- PerlMemShared_free(trie->jump);
- if (trie->nextword)
- PerlMemShared_free(trie->nextword);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- }
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: regfree data code '%c'", ri->data->what[n]);
- }
- }
- Safefree(ri->data->what);
- Safefree(ri->data);
- }
-
- Safefree(ri);
-}
-
-#define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
-#define av_dup_inc(s,t) MUTABLE_AV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define hv_dup_inc(s,t) MUTABLE_HV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define SAVEPVN(p,n) ((p) ? savepvn(p,n) : NULL)
-
-/*
- re_dup - duplicate a regexp.
-
- This routine is expected to clone a given regexp structure. It is only
- compiled under USE_ITHREADS.
-
- After all of the core data stored in struct regexp is duplicated
- the regexp_engine.dupe method is used to copy any private data
- stored in the *pprivate pointer. This allows extensions to handle
- any duplication it needs to do.
-
- See pregfree() and regfree_internal() if you change anything here.
-*/
-#if defined(USE_ITHREADS)
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_re_dup_guts(pTHX_ const REGEXP *sstr, REGEXP *dstr, CLONE_PARAMS *param)
-{
- dVAR;
- I32 npar;
- const struct regexp *r = (const struct regexp *)SvANY(sstr);
- struct regexp *ret = (struct regexp *)SvANY(dstr);
-
- PERL_ARGS_ASSERT_RE_DUP_GUTS;
-
- npar = r->nparens+1;
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if(ret->swap) {
- /* no need to copy these */
- Newx(ret->swap, npar, regexp_paren_pair);
- }
-
- if (ret->substrs) {
- /* Do it this way to avoid reading from *r after the StructCopy().
- That way, if any of the sv_dup_inc()s dislodge *r from the L1
- cache, it doesn't matter. */
- const bool anchored = r->check_substr
- ? r->check_substr == r->anchored_substr
- : r->check_utf8 == r->anchored_utf8;
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- ret->anchored_substr = sv_dup_inc(ret->anchored_substr, param);
- ret->anchored_utf8 = sv_dup_inc(ret->anchored_utf8, param);
- ret->float_substr = sv_dup_inc(ret->float_substr, param);
- ret->float_utf8 = sv_dup_inc(ret->float_utf8, param);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
-
- if (ret->check_substr) {
- if (anchored) {
- assert(r->check_utf8 == r->anchored_utf8);
- ret->check_substr = ret->anchored_substr;
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- assert(r->check_substr == r->float_substr);
- assert(r->check_utf8 == r->float_utf8);
- ret->check_substr = ret->float_substr;
- ret->check_utf8 = ret->float_utf8;
- }
- } else if (ret->check_utf8) {
- if (anchored) {
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- ret->check_utf8 = ret->float_utf8;
- }
- }
- }
-
- RXp_PAREN_NAMES(ret) = hv_dup_inc(RXp_PAREN_NAMES(ret), param);
-
- if (ret->pprivate)
- RXi_SET(ret,CALLREGDUPE_PVT(dstr,param));
-
- if (RX_MATCH_COPIED(dstr))
- ret->subbeg = SAVEPVN(ret->subbeg, ret->sublen);
- else
- ret->subbeg = NULL;
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
-
- ret->mother_re = NULL;
- ret->gofs = 0;
-}
-#endif /* PERL_IN_XSUB_RE */
-
-/*
- regdupe_internal()
-
- This is the internal complement to regdupe() which is used to copy
- the structure pointed to by the *pprivate pointer in the regexp.
- This is the core version of the extension overridable cloning hook.
- The regexp structure being duplicated will be copied by perl prior
- to this and will be provided as the regexp *r argument, however
- with the /old/ structures pprivate pointer value. Thus this routine
- may override any copying normally done by perl.
-
- It returns a pointer to the new regexp_internal structure.
-*/
-
-void *
-Perl_regdupe_internal(pTHX_ REGEXP * const rx, CLONE_PARAMS *param)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- regexp_internal *reti;
- int len, npar;
- RXi_GET_DECL(r,ri);
-
- PERL_ARGS_ASSERT_REGDUPE_INTERNAL;
-
- npar = r->nparens+1;
- len = ProgLen(ri);
-
- Newxc(reti, sizeof(regexp_internal) + len*sizeof(regnode), char, regexp_internal);
- Copy(ri->program, reti->program, len+1, regnode);
-
-
- reti->regstclass = NULL;
-
- if (ri->data) {
- struct reg_data *d;
- const int count = ri->data->count;
- int i;
-
- Newxc(d, sizeof(struct reg_data) + count*sizeof(void *),
- char, struct reg_data);
- Newx(d->what, count, U8);
-
- d->count = count;
- for (i = 0; i < count; i++) {
- d->what[i] = ri->data->what[i];
- switch (d->what[i]) {
- /* legal options are one of: sSfpontTu
- see also regcomp.h and pregfree() */
- case 's':
- case 'S':
- case 'p': /* actually an AV, but the dup function is identical. */
- case 'u': /* actually an HV, but the dup function is identical. */
- d->data[i] = sv_dup_inc((const SV *)ri->data->data[i], param);
- break;
- case 'f':
- /* This is cheating. */
- Newx(d->data[i], 1, struct regnode_charclass_class);
- StructCopy(ri->data->data[i], d->data[i],
- struct regnode_charclass_class);
- reti->regstclass = (regnode*)d->data[i];
- break;
- case 'o':
- /* Compiled op trees are readonly and in shared memory,
- and can thus be shared without duplication. */
- OP_REFCNT_LOCK;
- d->data[i] = (void*)OpREFCNT_inc((OP*)ri->data->data[i]);
- OP_REFCNT_UNLOCK;
- break;
- case 'T':
- /* Trie stclasses are readonly and can thus be shared
- * without duplication. We free the stclass in pregfree
- * when the corresponding reg_ac_data struct is freed.
- */
- reti->regstclass= ri->regstclass;
- /* Fall through */
- case 't':
- OP_REFCNT_LOCK;
- ((reg_trie_data*)ri->data->data[i])->refcount++;
- OP_REFCNT_UNLOCK;
- /* Fall through */
- case 'n':
- d->data[i] = ri->data->data[i];
- break;
- default:
- Perl_croak(aTHX_ "panic: re_dup unknown data code '%c'", ri->data->what[i]);
- }
- }
-
- reti->data = d;
- }
- else
- reti->data = NULL;
-
- reti->name_list_idx = ri->name_list_idx;
-
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets) {
- Newx(reti->u.offsets, 2*len+1, U32);
- Copy(ri->u.offsets, reti->u.offsets, 2*len+1, U32);
- }
-#else
- SetProgLen(reti,len);
-#endif
-
- return (void*)reti;
-}
-
-#endif /* USE_ITHREADS */
-
-#ifndef PERL_IN_XSUB_RE
-
-/*
- - regnext - dig the "next" pointer out of a node
- */
-regnode *
-Perl_regnext(pTHX_ register regnode *p)
-{
- dVAR;
- register I32 offset;
-
- if (!p)
- return(NULL);
-
- offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p));
- if (offset == 0)
- return(NULL);
-
- return(p+offset);
-}
-#endif
-
-STATIC void
-S_re_croak2(pTHX_ const char* pat1,const char* pat2,...)
-{
- va_list args;
- STRLEN l1 = strlen(pat1);
- STRLEN l2 = strlen(pat2);
- char buf[512];
- SV *msv;
- const char *message;
-
- PERL_ARGS_ASSERT_RE_CROAK2;
-
- if (l1 > 510)
- l1 = 510;
- if (l1 + l2 > 510)
- l2 = 510 - l1;
- Copy(pat1, buf, l1 , char);
- Copy(pat2, buf + l1, l2 , char);
- buf[l1 + l2] = '\n';
- buf[l1 + l2 + 1] = '\0';
-#ifdef I_STDARG
- /* ANSI variant takes additional second argument */
- va_start(args, pat2);
-#else
- va_start(args);
-#endif
- msv = vmess(buf, &args);
- va_end(args);
- message = SvPV_const(msv,l1);
- if (l1 > 512)
- l1 = 512;
- Copy(message, buf, l1 , char);
- buf[l1-1] = '\0'; /* Overwrite \n */
- Perl_croak(aTHX_ "%s", buf);
-}
-
-/* XXX Here's a total kludge. But we need to re-enter for swash routines. */
-
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_save_re_context(pTHX)
-{
- dVAR;
-
- struct re_save_state *state;
-
- SAVEVPTR(PL_curcop);
- SSGROW(SAVESTACK_ALLOC_FOR_RE_SAVE_STATE + 1);
-
- state = (struct re_save_state *)(PL_savestack + PL_savestack_ix);
- PL_savestack_ix += SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
- SSPUSHINT(SAVEt_RE_STATE);
-
- Copy(&PL_reg_state, state, 1, struct re_save_state);
-
- PL_reg_start_tmp = 0;
- PL_reg_start_tmpl = 0;
- PL_reg_oldsaved = NULL;
- PL_reg_oldsavedlen = 0;
- PL_reg_maxiter = 0;
- PL_reg_leftiter = 0;
- PL_reg_poscache = NULL;
- PL_reg_poscache_size = 0;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = NULL;
-#endif
-
- /* Save $1..$n (#18107: UTF-8 s/(\w+)/uc($1)/e); AMS 20021106. */
- if (PL_curpm) {
- const REGEXP * const rx = PM_GETRE(PL_curpm);
- if (rx) {
- U32 i;
- for (i = 1; i <= RX_NPARENS(rx); i++) {
- char digits[TYPE_CHARS(long)];
- const STRLEN len = my_snprintf(digits, sizeof(digits), "%lu", (long)i);
- GV *const *const gvp
- = (GV**)hv_fetch(PL_defstash, digits, len, 0);
-
- if (gvp) {
- GV * const gv = *gvp;
- if (SvTYPE(gv) == SVt_PVGV && GvSV(gv))
- save_scalar(gv);
- }
- }
- }
- }
-}
-#endif
-
-static void
-clear_re(pTHX_ void *r)
-{
- dVAR;
- ReREFCNT_dec((REGEXP *)r);
-}
-
-#ifdef DEBUGGING
-
-STATIC void
-S_put_byte(pTHX_ SV *sv, int c)
-{
- PERL_ARGS_ASSERT_PUT_BYTE;
-
- /* Our definition of isPRINT() ignores locales, so only bytes that are
- not part of UTF-8 are considered printable. I assume that the same
- holds for UTF-EBCDIC.
- Also, code point 255 is not printable in either (it's E0 in EBCDIC,
- which Wikipedia says:
-
- EO, or Eight Ones, is an 8-bit EBCDIC character code represented as all
- ones (binary 1111 1111, hexadecimal FF). It is similar, but not
- identical, to the ASCII delete (DEL) or rubout control character.
- ) So the old condition can be simplified to !isPRINT(c) */
- if (!isPRINT(c))
- Perl_sv_catpvf(aTHX_ sv, "\\%o", c);
- else {
- const char string = c;
- if (c == '-' || c == ']' || c == '\\' || c == '^')
- sv_catpvs(sv, "\\");
- sv_catpvn(sv, &string, 1);
- }
-}
-
-
-#define CLEAR_OPTSTART \
- if (optstart) STMT_START { \
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log, " (%"IVdf" nodes)\n", (IV)(node - optstart))); \
- optstart=NULL; \
- } STMT_END
-
-#define DUMPUNTIL(b,e) CLEAR_OPTSTART; node=dumpuntil(r,start,(b),(e),last,sv,indent+1,depth+1);
-
-STATIC const regnode *
-S_dumpuntil(pTHX_ const regexp *r, const regnode *start, const regnode *node,
- const regnode *last, const regnode *plast,
- SV* sv, I32 indent, U32 depth)
-{
- dVAR;
- register U8 op = PSEUDO; /* Arbitrary non-END op. */
- register const regnode *next;
- const regnode *optstart= NULL;
-
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMPUNTIL;
-
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d : %d - %d - %d\n",indent,node-start,
- last ? last-start : 0,plast ? plast-start : 0);
-#endif
-
- if (plast && plast < last)
- last= plast;
-
- while (PL_regkind[op] != END && (!last || node < last)) {
- /* While that wasn't END last time... */
- NODE_ALIGN(node);
- op = OP(node);
- if (op == CLOSE || op == WHILEM)
- indent--;
- next = regnext((regnode *)node);
-
- /* Where, what. */
- if (OP(node) == OPTIMIZED) {
- if (!optstart && RE_DEBUG_FLAG(RE_DEBUG_COMPILE_OPTIMISE))
- optstart = node;
- else
- goto after_print;
- } else
- CLEAR_OPTSTART;
-
- regprop(r, sv, node);
- PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start),
- (int)(2*indent + 1), "", SvPVX_const(sv));
-
- if (OP(node) != OPTIMIZED) {
- if (next == NULL) /* Next ptr. */
- PerlIO_printf(Perl_debug_log, " (0)");
- else if (PL_regkind[(U8)op] == BRANCH && PL_regkind[OP(next)] != BRANCH )
- PerlIO_printf(Perl_debug_log, " (FAIL)");
- else
- PerlIO_printf(Perl_debug_log, " (%"IVdf")", (IV)(next - start));
- (void)PerlIO_putc(Perl_debug_log, '\n');
- }
-
- after_print:
- if (PL_regkind[(U8)op] == BRANCHJ) {
- assert(next);
- {
- register const regnode *nnode = (OP(next) == LONGJMP
- ? regnext((regnode *)next)
- : next);
- if (last && nnode > last)
- nnode = last;
- DUMPUNTIL(NEXTOPER(NEXTOPER(node)), nnode);
- }
- }
- else if (PL_regkind[(U8)op] == BRANCH) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node), next);
- }
- else if ( PL_regkind[(U8)op] == TRIE ) {
- const regnode *this_trie = node;
- const char op = OP(node);
- const U32 n = ARG(node);
- const reg_ac_data * const ac = op>=AHOCORASICK ?
- (reg_ac_data *)ri->data->data[n] :
- NULL;
- const reg_trie_data * const trie =
- (reg_trie_data*)ri->data->data[op<AHOCORASICK ? n : ac->trie];
-#ifdef DEBUGGING
- AV *const trie_words = MUTABLE_AV(ri->data->data[n + TRIE_WORDS_OFFSET]);
-#endif
- const regnode *nextbranch= NULL;
- I32 word_idx;
- sv_setpvs(sv, "");
- for (word_idx= 0; word_idx < (I32)trie->wordcount; word_idx++) {
- SV ** const elem_ptr = av_fetch(trie_words,word_idx,0);
-
- PerlIO_printf(Perl_debug_log, "%*s%s ",
- (int)(2*(indent+3)), "",
- elem_ptr ? pv_pretty(sv, SvPV_nolen_const(*elem_ptr), SvCUR(*elem_ptr), 60,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*elem_ptr) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT
- )
- : "???"
- );
- if (trie->jump) {
- U16 dist= trie->jump[word_idx+1];
- PerlIO_printf(Perl_debug_log, "(%"UVuf")\n",
- (UV)((dist ? this_trie + dist : next) - start));
- if (dist) {
- if (!nextbranch)
- nextbranch= this_trie + trie->jump[0];
- DUMPUNTIL(this_trie + dist, nextbranch);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode *)nextbranch);
- } else {
- PerlIO_printf(Perl_debug_log, "\n");
- }
- }
- if (last && next > last)
- node= last;
- else
- node= next;
- }
- else if ( op == CURLY ) { /* "next" might be very big: optimizer */
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS,
- NEXTOPER(node) + EXTRA_STEP_2ARGS + 1);
- }
- else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, next);
- }
- else if ( op == PLUS || op == STAR) {
- DUMPUNTIL(NEXTOPER(node), NEXTOPER(node) + 1);
- }
- else if (op == ANYOF) {
- /* arglen 1 + class block */
- node += 1 + ((ANYOF_FLAGS(node) & ANYOF_LARGE)
- ? ANYOF_CLASS_SKIP : ANYOF_SKIP);
- node = NEXTOPER(node);
- }
- else if (PL_regkind[(U8)op] == EXACT) {
- /* Literal string, where present. */
- node += NODE_SZ_STR(node) - 1;
- node = NEXTOPER(node);
- }
- else {
- node = NEXTOPER(node);
- node += regarglen[(U8)op];
- }
- if (op == CURLYX || op == OPEN)
- indent++;
- }
- CLEAR_OPTSTART;
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d\n", (int)indent);
-#endif
- return node;
-}
-
-#endif /* DEBUGGING */
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regexec.c
- */
-
-/*
- * One Ring to rule them all, One Ring to find them
- &
- * [p.v of _The Lord of the Rings_, opening poem]
- * [p.50 of _The Lord of the Rings_, I/iii: "The Shadow of the Past"]
- * [p.254 of _The Lord of the Rings_, II/ii: "The Council of Elrond"]
- */
-
-/* This file contains functions for executing a regular expression. See
- * also regcomp.c which funnily enough, contains functions for compiling
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_exec.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGEXEC_C
-#include "perl.h"
-#include "re_defs.h"
-
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#define RF_tainted 1 /* tainted information used? */
-#define RF_warned 2 /* warned about big count? */
-
-#define RF_utf8 8 /* Pattern contains multibyte chars? */
-
-#define UTF ((PL_reg_flags & RF_utf8) != 0)
-
-#define RS_init 1 /* eval environment created */
-#define RS_set 2 /* replsv value is set */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-#define REGINCLASS(prog,p,c) (ANYOF_FLAGS(p) ? reginclass(prog,p,c,0,0) : ANYOF_BITMAP_TEST(p,*(c)))
-
-/*
- * Forwards.
- */
-
-#define CHR_SVLEN(sv) (do_utf8 ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (PL_reg_match_utf8 ? utf8_distance(a,b) : a - b)
-
-#define HOPc(pos,off) \
- (char *)(PL_reg_match_utf8 \
- ? reghop3((U8*)pos, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)) \
- : (U8*)(pos + off))
-#define HOPBACKc(pos, off) \
- (char*)(PL_reg_match_utf8\
- ? reghopmaybe3((U8*)pos, -off, (U8*)PL_bostr) \
- : (pos - off >= PL_bostr) \
- ? (U8*)pos - off \
- : NULL)
-
-#define HOP3(pos,off,lim) (PL_reg_match_utf8 ? reghop3((U8*)(pos), off, (U8*)(lim)) : (U8*)(pos + off))
-#define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim))
-
-/* these are unrolled below in the CCC_TRY_XXX defined */
-#define LOAD_UTF8_CHARCLASS(class,str) STMT_START { \
- if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)str); assert(ok); LEAVE; } } STMT_END
-#define LOAD_UTF8_CHARCLASS_ALNUM() LOAD_UTF8_CHARCLASS(alnum,"a")
-#define LOAD_UTF8_CHARCLASS_DIGIT() LOAD_UTF8_CHARCLASS(digit,"0")
-#define LOAD_UTF8_CHARCLASS_SPACE() LOAD_UTF8_CHARCLASS(space," ")
-#define LOAD_UTF8_CHARCLASS_MARK() LOAD_UTF8_CHARCLASS(mark, "\xcd\x86")
-
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS_ALNUM()
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS_SPACE()
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS_DIGIT()
-#define RE_utf8_perl_word PL_utf8_alnum
-#define RE_utf8_perl_space PL_utf8_space
-#define RE_utf8_posix_digit PL_utf8_digit
-#define perl_word alnum
-#define perl_space space
-#define posix_digit digit
-#else
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS(perl_word,"a")
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS(perl_space," ")
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS(posix_digit,"0")
-#define RE_utf8_perl_word PL_utf8_perl_word
-#define RE_utf8_perl_space PL_utf8_perl_space
-#define RE_utf8_posix_digit PL_utf8_posix_digit
-#endif
-
-
-#define CCC_TRY_AFF(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME: \
- if (!nextchr) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if (!(OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if (!(OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-#define CCC_TRY_NEG(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME : \
- if (!nextchr && locinput >= PL_regeol) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if ((OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if ((OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-
-
-
-
-/* TODO: Combine JUMPABLE and HAS_TEXT to cache OP(rn) */
-
-/* for use after a quantifier and before an EXACT-like node -- japhy */
-/* it would be nice to rework regcomp.sym to generate this stuff. sigh */
-#define JUMPABLE(rn) ( \
- OP(rn) == OPEN || \
- (OP(rn) == CLOSE && (!cur_eval || cur_eval->u.eval.close_paren != ARG(rn))) || \
- OP(rn) == EVAL || \
- OP(rn) == SUSPEND || OP(rn) == IFMATCH || \
- OP(rn) == PLUS || OP(rn) == MINMOD || \
- OP(rn) == KEEPS || (PL_regkind[OP(rn)] == VERB) || \
- (PL_regkind[OP(rn)] == CURLY && ARG1(rn) > 0) \
-)
-#define IS_EXACT(rn) (PL_regkind[OP(rn)] == EXACT)
-
-#define HAS_TEXT(rn) ( IS_EXACT(rn) || PL_regkind[OP(rn)] == REF )
-
-#if 0
-/* Currently these are only used when PL_regkind[OP(rn)] == EXACT so
- we don't need this definition. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT || OP(rn)==REF || OP(rn)==NREF )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF || OP(rn)==REFF || OP(rn)==NREFF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL || OP(rn)==REFFL || OP(rn)==NREFFL )
-
-#else
-/* ... so we use this as its faster. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL )
-
-#endif
-
-/*
- Search for mandatory following text node; for lookahead, the text must
- follow but for lookbehind (rn->flags != 0) we skip to the next step.
-*/
-#define FIND_NEXT_IMPT(rn) STMT_START { \
- while (JUMPABLE(rn)) { \
- const OPCODE type = OP(rn); \
- if (type == SUSPEND || PL_regkind[type] == CURLY) \
- rn = NEXTOPER(NEXTOPER(rn)); \
- else if (type == PLUS) \
- rn = NEXTOPER(rn); \
- else if (type == IFMATCH) \
- rn = (rn->flags == 0) ? NEXTOPER(NEXTOPER(rn)) : rn + ARG(rn); \
- else rn += NEXT_OFF(rn); \
- } \
-} STMT_END
-
-
-static void restore_pos(pTHX_ void *arg);
-
-STATIC CHECKPOINT
-S_regcppush(pTHX_ I32 parenfloor)
-{
- dVAR;
- const int retval = PL_savestack_ix;
-#define REGCP_PAREN_ELEMS 4
- const int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS;
- int p;
- GET_RE_DEBUG_FLAGS_DECL;
-
- if (paren_elems_to_push < 0)
- Perl_croak(aTHX_ "panic: paren_elems_to_push < 0");
-
-#define REGCP_OTHER_ELEMS 7
- SSGROW(paren_elems_to_push + REGCP_OTHER_ELEMS);
-
- for (p = PL_regsize; p > parenfloor; p--) {
-/* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */
- SSPUSHINT(PL_regoffs[p].end);
- SSPUSHINT(PL_regoffs[p].start);
- SSPUSHPTR(PL_reg_start_tmp[p]);
- SSPUSHINT(p);
- DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log,
- " saving \\%"UVuf" %"IVdf"(%"IVdf")..%"IVdf"\n",
- (UV)p, (IV)PL_regoffs[p].start,
- (IV)(PL_reg_start_tmp[p] - PL_bostr),
- (IV)PL_regoffs[p].end
- ));
- }
-/* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */
- SSPUSHPTR(PL_regoffs);
- SSPUSHINT(PL_regsize);
- SSPUSHINT(*PL_reglastparen);
- SSPUSHINT(*PL_reglastcloseparen);
- SSPUSHPTR(PL_reginput);
-#define REGCP_FRAME_ELEMS 2
-/* REGCP_FRAME_ELEMS are part of the REGCP_OTHER_ELEMS and
- * are needed for the regexp context stack bookkeeping. */
- SSPUSHINT(paren_elems_to_push + REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- SSPUSHINT(SAVEt_REGCONTEXT); /* Magic cookie. */
-
- return retval;
-}
-
-/* These are needed since we do not localize EVAL nodes: */
-#define REGCP_SET(cp) \
- DEBUG_STATE_r( \
- PerlIO_printf(Perl_debug_log, \
- " Setting an EVAL scope, savestack=%"IVdf"\n", \
- (IV)PL_savestack_ix)); \
- cp = PL_savestack_ix
-
-#define REGCP_UNWIND(cp) \
- DEBUG_STATE_r( \
- if (cp != PL_savestack_ix) \
- PerlIO_printf(Perl_debug_log, \
- " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \
- (IV)(cp), (IV)PL_savestack_ix)); \
- regcpblow(cp)
-
-STATIC char *
-S_regcppop(pTHX_ const regexp *rex)
-{
- dVAR;
- U32 i;
- char *input;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCPPOP;
-
- /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */
- i = SSPOPINT;
- assert(i == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */
- i = SSPOPINT; /* Parentheses elements to pop. */
- input = (char *) SSPOPPTR;
- *PL_reglastcloseparen = SSPOPINT;
- *PL_reglastparen = SSPOPINT;
- PL_regsize = SSPOPINT;
- PL_regoffs=(regexp_paren_pair *) SSPOPPTR;
-
-
- /* Now restore the parentheses context. */
- for (i -= (REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- i > 0; i -= REGCP_PAREN_ELEMS) {
- I32 tmps;
- U32 paren = (U32)SSPOPINT;
- PL_reg_start_tmp[paren] = (char *) SSPOPPTR;
- PL_regoffs[paren].start = SSPOPINT;
- tmps = SSPOPINT;
- if (paren <= *PL_reglastparen)
- PL_regoffs[paren].end = tmps;
- DEBUG_BUFFERS_r(
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n",
- (UV)paren, (IV)PL_regoffs[paren].start,
- (IV)(PL_reg_start_tmp[paren] - PL_bostr),
- (IV)PL_regoffs[paren].end,
- (paren > *PL_reglastparen ? "(no)" : ""));
- );
- }
- DEBUG_BUFFERS_r(
- if (*PL_reglastparen + 1 <= rex->nparens) {
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"IVdf"..\\%"IVdf" to undef\n",
- (IV)(*PL_reglastparen + 1), (IV)rex->nparens);
- }
- );
-#if 1
- /* It would seem that the similar code in regtry()
- * already takes care of this, and in fact it is in
- * a better location to since this code can #if 0-ed out
- * but the code in regtry() is needed or otherwise tests
- * requiring null fields (pat.t#187 and split.t#{13,14}
- * (as of patchlevel 7877) will fail. Then again,
- * this code seems to be necessary or otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * --jhi updated by dapm */
- for (i = *PL_reglastparen + 1; i <= rex->nparens; i++) {
- if (i > PL_regsize)
- PL_regoffs[i].start = -1;
- PL_regoffs[i].end = -1;
- }
-#endif
- return input;
-}
-
-#define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */
-
-/*
- * pregexec and friends
- */
-
-#ifndef PERL_IN_XSUB_RE
-/*
- - pregexec - match a regexp against a string
- */
-I32
-Perl_pregexec(pTHX_ REGEXP * const prog, char* stringarg, register char *strend,
- char *strbeg, I32 minend, SV *screamer, U32 nosave)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* nosave: For optimizations. */
-{
- PERL_ARGS_ASSERT_PREGEXEC;
-
- return
- regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL,
- nosave ? 0 : REXEC_COPY_STR);
-}
-#endif
-
-/*
- * Need to implement the following flags for reg_anch:
- *
- * USE_INTUIT_NOML - Useful to call re_intuit_start() first
- * USE_INTUIT_ML
- * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer
- * INTUIT_AUTORITATIVE_ML
- * INTUIT_ONCE_NOML - Intuit can match in one location only.
- * INTUIT_ONCE_ML
- *
- * Another flag for this function: SECOND_TIME (so that float substrs
- * with giant delta may be not rechecked).
- */
-
-/* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */
-
-/* If SCREAM, then SvPVX_const(sv) should be compatible with strpos and strend.
- Otherwise, only SvCUR(sv) is used to get strbeg. */
-
-/* XXXX We assume that strpos is strbeg unless sv. */
-
-/* XXXX Some places assume that there is a fixed substring.
- An update may be needed if optimizer marks as "INTUITable"
- RExen without fixed substrings. Similarly, it is assumed that
- lengths of all the strings are no more than minlen, thus they
- cannot come from lookahead.
- (Or minlen should take into account lookahead.)
- NOTE: Some of this comment is not correct. minlen does now take account
- of lookahead/behind. Further research is required. -- demerphq
-
-*/
-
-/* A failure to find a constant substring means that there is no need to make
- an expensive call to REx engine, thus we celebrate a failure. Similarly,
- finding a substring too deep into the string means that less calls to
- regtry() should be needed.
-
- REx compiler's optimizer found 4 possible hints:
- a) Anchored substring;
- b) Fixed substring;
- c) Whether we are anchored (beginning-of-line or \G);
- d) First node (of those at offset 0) which may distingush positions;
- We use a)b)d) and multiline-part of c), and try to find a position in the
- string which does not contradict any of them.
- */
-
-/* Most of decisions we do here should have been done at compile time.
- The nodes of the REx which we used for the search should have been
- deleted from the finite automaton. */
-
-char *
-Perl_re_intuit_start(pTHX_ REGEXP * const rx, SV *sv, char *strpos,
- char *strend, const U32 flags, re_scream_pos_data *data)
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- register I32 start_shift = 0;
- /* Should be nonnegative! */
- register I32 end_shift = 0;
- register char *s;
- register SV *check;
- char *strbeg;
- char *t;
- const bool do_utf8 = (sv && SvUTF8(sv)) ? 1 : 0; /* if no sv we have to assume bytes */
- I32 ml_anch;
- register char *other_last = NULL; /* other substr checked before this */
- char *check_at = NULL; /* check substr found at this pos */
- const I32 multiline = prog->extflags & RXf_PMf_MULTILINE;
- RXi_GET_DECL(prog,progi);
-#ifdef DEBUGGING
- const char * const i_strpos = strpos;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_START;
-
- RX_MATCH_UTF8_set(rx,do_utf8);
-
- if (RX_UTF8(rx)) {
- PL_reg_flags |= RF_utf8;
- }
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, strpos, strend,
- sv ? "Guessing start of match in sv for"
- : "Guessing start of match in string for");
- );
-
- /* CHR_DIST() would be more correct here but it makes things slow. */
- if (prog->minlen > strend - strpos) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short... [re_intuit_start]\n"));
- goto fail;
- }
-
- strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos;
- PL_regeol = strend;
- if (do_utf8) {
- if (!prog->check_utf8 && prog->check_substr)
- to_utf8_substr(prog);
- check = prog->check_utf8;
- } else {
- if (!prog->check_substr && prog->check_utf8)
- to_byte_substr(prog);
- check = prog->check_substr;
- }
- if (check == &PL_sv_undef) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Non-utf8 string cannot match utf8 check string\n"));
- goto fail;
- }
- if (prog->extflags & RXf_ANCH) { /* Match at beg-of-str or after \n */
- ml_anch = !( (prog->extflags & RXf_ANCH_SINGLE)
- || ( (prog->extflags & RXf_ANCH_BOL)
- && !multiline ) ); /* Check after \n? */
-
- if (!ml_anch) {
- if ( !(prog->extflags & RXf_ANCH_GPOS) /* Checked by the caller */
- && !(prog->intflags & PREGf_IMPLICIT) /* not a real BOL */
- /* SvCUR is not set on references: SvRV and SvPVX_const overlap */
- && sv && !SvROK(sv)
- && (strpos != strbeg)) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not at start...\n"));
- goto fail;
- }
- if (prog->check_offset_min == prog->check_offset_max &&
- !(prog->extflags & RXf_CANY_SEEN)) {
- /* Substring at constant offset from beg-of-str... */
- I32 slen;
-
- s = HOP3c(strpos, prog->check_offset_min, strend);
-
- if (SvTAIL(check)) {
- slen = SvCUR(check); /* >= 1 */
-
- if ( strend - s > slen || strend - s < slen - 1
- || (strend - s == slen && strend[-1] != '\n')) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String too long...\n"));
- goto fail_finish;
- }
- /* Now should match s[0..slen-2] */
- slen--;
- if (slen && (*SvPVX_const(check) != *s
- || (slen > 1
- && memNE(SvPVX_const(check), s, slen)))) {
- report_neq:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String not equal...\n"));
- goto fail_finish;
- }
- }
- else if (*SvPVX_const(check) != *s
- || ((slen = SvCUR(check)) > 1
- && memNE(SvPVX_const(check), s, slen)))
- goto report_neq;
- check_at = s;
- goto success_at_start;
- }
- }
- /* Match is anchored, but substr is not anchored wrt beg-of-str. */
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- if (!ml_anch) {
- const I32 end = prog->check_offset_max + CHR_SVLEN(check)
- - (SvTAIL(check) != 0);
- const I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end;
-
- if (end_shift < eshift)
- end_shift = eshift;
- }
- }
- else { /* Can match at random position */
- ml_anch = 0;
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- /* end shift should be non negative here */
- }
-
-#ifdef QDEBUGGING /* 7/99: reports of failure (with the older version) */
- if (end_shift < 0)
- Perl_croak(aTHX_ "panic: end_shift: %"IVdf" pattern:\n%s\n ",
- (IV)end_shift, RX_PRECOMP(prog));
-#endif
-
- restart:
- /* Find a possible match in the region s..strend by looking for
- the "check" substring in the region corrected by start/end_shift. */
-
- {
- I32 srch_start_shift = start_shift;
- I32 srch_end_shift = end_shift;
- if (srch_start_shift < 0 && strbeg - s > srch_start_shift) {
- srch_end_shift -= ((strbeg - s) - srch_start_shift);
- srch_start_shift = strbeg - s;
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "Check offset min: %"IVdf" Start shift: %"IVdf" End shift %"IVdf" Real End Shift: %"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)srch_start_shift,
- (IV)srch_end_shift,
- (IV)prog->check_end_shift);
- });
-
- if (flags & REXEC_SCREAM) {
- I32 p = -1; /* Internal iterator of scream. */
- I32 * const pp = data ? data->scream_pos : &p;
-
- if (PL_screamfirst[BmRARE(check)] >= 0
- || ( BmRARE(check) == '\n'
- && (BmPREVIOUS(check) == SvCUR(check) - 1)
- && SvTAIL(check) ))
- s = screaminstr(sv, check,
- srch_start_shift + (s - strbeg), srch_end_shift, pp, 0);
- else
- goto fail_finish;
- /* we may be pointing at the wrong string */
- if (s && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- if (data)
- *data->scream_olds = s;
- }
- else {
- U8* start_point;
- U8* end_point;
- if (prog->extflags & RXf_CANY_SEEN) {
- start_point= (U8*)(s + srch_start_shift);
- end_point= (U8*)(strend - srch_end_shift);
- } else {
- start_point= HOP3(s, srch_start_shift, srch_start_shift < 0 ? strbeg : strend);
- end_point= HOP3(strend, -srch_end_shift, strbeg);
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "fbm_instr len=%d str=<%.*s>\n",
- (int)(end_point - start_point),
- (int)(end_point - start_point) > 20 ? 20 : (int)(end_point - start_point),
- start_point);
- });
-
- s = fbm_instr( start_point, end_point,
- check, multiline ? FBMrf_MULTILINE : 0);
- }
- }
- /* Update the count-of-usability, remove useless subpatterns,
- unshift s. */
-
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(check), RE_SV_DUMPLEN(check), 30);
- PerlIO_printf(Perl_debug_log, "%s %s substr %s%s%s",
- (s ? "Found" : "Did not find"),
- (check == (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)
- ? "anchored" : "floating"),
- quoted,
- RE_SV_TAIL(check),
- (s ? " at offset " : "...\n") );
- });
-
- if (!s)
- goto fail_finish;
- /* Finish the diagnostic message */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) );
-
- /* XXX dmq: first branch is for positive lookbehind...
- Our check string is offset from the beginning of the pattern.
- So we need to do any stclass tests offset forward from that
- point. I think. :-(
- */
-
-
-
- check_at=s;
-
-
- /* Got a candidate. Check MBOL anchoring, and the *other* substr.
- Start with the other substr.
- XXXX no SCREAM optimization yet - and a very coarse implementation
- XXXX /ttx+/ results in anchored="ttx", floating="x". floating will
- *always* match. Probably should be marked during compile...
- Probably it is right to do no SCREAM here...
- */
-
- if (do_utf8 ? (prog->float_utf8 && prog->anchored_utf8)
- : (prog->float_substr && prog->anchored_substr))
- {
- /* Take into account the "other" substring. */
- /* XXXX May be hopelessly wrong for UTF... */
- if (!other_last)
- other_last = strpos;
- if (check == (do_utf8 ? prog->float_utf8 : prog->float_substr)) {
- do_other_anchored:
- {
- char * const last = HOP3c(s, -start_shift, strbeg);
- char *last1, *last2;
- char * const saved_s = s;
- SV* must;
-
- t = s - prog->check_offset_max;
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -(prog->check_offset_max), (U8*)strpos))
- && t > strpos)))
- NOOP;
- else
- t = strpos;
- t = HOP3c(t, prog->anchored_offset, strend);
- if (t < other_last) /* These positions already checked */
- t = other_last;
- last2 = last1 = HOP3c(strend, -prog->minlen, strbeg);
- if (last < last1)
- last1 = last;
- /* XXXX It is not documented what units *_offsets are in.
- We assume bytes, but this is clearly wrong.
- Meaning this code needs to be carefully reviewed for errors.
- dmq.
- */
-
- /* On end-of-str: see comment below. */
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->anchored_utf8); /* for debug */
- }
- else
- s = fbm_instr(
- (unsigned char*)t,
- HOP3(HOP3(last1, prog->anchored_offset, strend)
- + SvCUR(must), -(SvTAIL(must)!=0), strbeg),
- must,
- multiline ? FBMrf_MULTILINE : 0
- );
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s anchored substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
-
-
- if (!s) {
- if (last1 >= last2) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying floating at offset %ld...\n",
- (long)(HOP3c(saved_s, 1, strend) - i_strpos)));
- other_last = HOP3c(last1, prog->anchored_offset+1, strend);
- s = HOP3c(last, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- t = HOP3c(s, -prog->anchored_offset, strbeg);
- other_last = HOP3c(s, 1, strend);
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
- else { /* Take into account the floating substring. */
- char *last, *last1;
- char * const saved_s = s;
- SV* must;
-
- t = HOP3c(s, -start_shift, strbeg);
- last1 = last =
- HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg);
- if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset)
- last = HOP3c(t, prog->float_max_offset, strend);
- s = HOP3c(t, prog->float_min_offset, strend);
- if (s < other_last)
- s = other_last;
- /* XXXX It is not documented what units *_offsets are in. Assume bytes. */
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- /* fbm_instr() takes into account exact value of end-of-str
- if the check is SvTAIL(ed). Since false positives are OK,
- and end-of-str is not later than strend we are OK. */
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->float_utf8); /* for debug message */
- }
- else
- s = fbm_instr((unsigned char*)s,
- (unsigned char*)last + SvCUR(must)
- - (SvTAIL(must)!=0),
- must, multiline ? FBMrf_MULTILINE : 0);
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s floating substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
- if (!s) {
- if (last1 == last) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying anchored starting at offset %ld...\n",
- (long)(saved_s + 1 - i_strpos)));
- other_last = last;
- s = HOP3c(t, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- other_last = s; /* Fix this later. --Hugo */
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
-
-
- t= (char*)HOP3( s, -prog->check_offset_max, (prog->check_offset_max<0) ? strend : strpos);
-
- DEBUG_OPTIMISE_MORE_r(
- PerlIO_printf(Perl_debug_log,
- "Check offset min:%"IVdf" max:%"IVdf" S:%"IVdf" t:%"IVdf" D:%"IVdf" end:%"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)prog->check_offset_max,
- (IV)(s-strpos),
- (IV)(t-strpos),
- (IV)(t-s),
- (IV)(strend-strpos)
- )
- );
-
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -prog->check_offset_max, (U8*) ((prog->check_offset_max<0) ? strend : strpos)))
- && t > strpos)))
- {
- /* Fixed substring is found far enough so that the match
- cannot start at strpos. */
- try_at_offset:
- if (ml_anch && t[-1] != '\n') {
- /* Eventually fbm_*() should handle this, but often
- anchored_offset is not 0, so this check will not be wasted. */
- /* XXXX In the code below we prefer to look for "^" even in
- presence of anchored substrings. And we search even
- beyond the found float position. These pessimizations
- are historical artefacts only. */
- find_anchor:
- while (t < strend - prog->minlen) {
- if (*t == '\n') {
- if (t < check_at - prog->check_offset_min) {
- if (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) {
- /* Since we moved from the found position,
- we definitely contradict the found anchored
- substr. Due to the above check we do not
- contradict "check" substr.
- Thus we can arrive here only if check substr
- is float. Redo checking for "other"=="fixed".
- */
- strpos = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset)));
- goto do_other_anchored;
- }
- /* We don't contradict the found floating substring. */
- /* XXXX Why not check for STCLASS? */
- s = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(s - i_strpos)));
- goto set_useful;
- }
- /* Position contradicts check-string */
- /* XXXX probably better to look for check-string
- than for "\n", so one should lower the limit for t? */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t + 1 - i_strpos)));
- other_last = strpos = s = t + 1;
- goto restart;
- }
- t++;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- goto fail_finish;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- }
- s = t;
- set_useful:
- ++BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr); /* hooray/5 */
- }
- else {
- /* The found string does not prohibit matching at strpos,
- - no optimization of calling REx engine can be performed,
- unless it was an MBOL and we are not after MBOL,
- or a future STCLASS check will fail this. */
- try_at_start:
- /* Even in this situation we may use MBOL flag if strpos is offset
- wrt the start of the string. */
- if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */
- && (strpos != strbeg) && strpos[-1] != '\n'
- /* May be due to an implicit anchor of m{.*foo} */
- && !(prog->intflags & PREGf_IMPLICIT))
- {
- t = strpos;
- goto find_anchor;
- }
- DEBUG_EXECUTE_r( if (ml_anch)
- PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n",
- (long)(strpos - i_strpos), PL_colors[0], PL_colors[1]);
- );
- success_at_start:
- if (!(prog->intflags & PREGf_NAUGHTY) /* XXXX If strpos moved? */
- && (do_utf8 ? (
- prog->check_utf8 /* Could be deleted already */
- && --BmUSEFUL(prog->check_utf8) < 0
- && (prog->check_utf8 == prog->float_utf8)
- ) : (
- prog->check_substr /* Could be deleted already */
- && --BmUSEFUL(prog->check_substr) < 0
- && (prog->check_substr == prog->float_substr)
- )))
- {
- /* If flags & SOMETHING - do not do it many times on the same match */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n"));
- /* XXX Does the destruction order has to change with do_utf8? */
- SvREFCNT_dec(do_utf8 ? prog->check_utf8 : prog->check_substr);
- SvREFCNT_dec(do_utf8 ? prog->check_substr : prog->check_utf8);
- prog->check_substr = prog->check_utf8 = NULL; /* disable */
- prog->float_substr = prog->float_utf8 = NULL; /* clear */
- check = NULL; /* abort */
- s = strpos;
- /* XXXX This is a remnant of the old implementation. It
- looks wasteful, since now INTUIT can use many
- other heuristics. */
- prog->extflags &= ~RXf_USE_INTUIT;
- }
- else
- s = strpos;
- }
-
- /* Last resort... */
- /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */
- /* trie stclasses are too expensive to use here, we are better off to
- leave it to regmatch itself */
- if (progi->regstclass && PL_regkind[OP(progi->regstclass)]!=TRIE) {
- /* minlen == 0 is possible if regstclass is \b or \B,
- and the fixed substr is ''$.
- Since minlen is already taken into account, s+1 is before strend;
- accidentally, minlen >= 1 guaranties no false positives at s + 1
- even for \b or \B. But (minlen? 1 : 0) below assumes that
- regstclass does not come from lookahead... */
- /* If regstclass takes bytelength more than 1: If charlength==1, OK.
- This leaves EXACTF only, which is dealt with in find_byclass(). */
- const U8* const str = (U8*)STRING(progi->regstclass);
- const int cl_l = (PL_regkind[OP(progi->regstclass)] == EXACT
- ? CHR_DIST(str+STR_LEN(progi->regstclass), str)
- : 1);
- char * endpos;
- if (prog->anchored_substr || prog->anchored_utf8 || ml_anch)
- endpos= HOP3c(s, (prog->minlen ? cl_l : 0), strend);
- else if (prog->float_substr || prog->float_utf8)
- endpos= HOP3c(HOP3c(check_at, -start_shift, strbeg), cl_l, strend);
- else
- endpos= strend;
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %"IVdf" s: %"IVdf" endpos: %"IVdf"\n",
- (IV)start_shift, (IV)(check_at - strbeg), (IV)(s - strbeg), (IV)(endpos - strbeg)));
-
- t = s;
- s = find_byclass(prog, progi->regstclass, s, endpos, NULL);
- if (!s) {
-#ifdef DEBUGGING
- const char *what = NULL;
-#endif
- if (endpos == strend) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "This position contradicts STCLASS...\n") );
- if ((prog->extflags & RXf_ANCH) && !ml_anch)
- goto fail;
- /* Contradict one of substrings */
- if (prog->anchored_substr || prog->anchored_utf8) {
- if ((do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) == check) {
- DEBUG_EXECUTE_r( what = "anchored" );
- hop_and_restart:
- s = HOP3c(t, 1, strend);
- if (s + start_shift + end_shift > strend) {
- /* XXXX Should be taken into account earlier? */
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for %s substr starting at offset %ld...\n",
- what, (long)(s + start_shift - i_strpos)) );
- goto restart;
- }
- /* Have both, check_string is floating */
- if (t + start_shift >= check_at) /* Contradicts floating=check */
- goto retry_floating_check;
- /* Recheck anchored substring, but not floating... */
- s = check_at;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for anchored substr starting at offset %ld...\n",
- (long)(other_last - i_strpos)) );
- goto do_other_anchored;
- }
- /* Another way we could have checked stclass at the
- current position only: */
- if (ml_anch) {
- s = t = t + 1;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for /%s^%s/m starting at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t - i_strpos)) );
- goto try_at_offset;
- }
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) /* Could have been deleted */
- goto fail;
- /* Check is floating subtring. */
- retry_floating_check:
- t = check_at - start_shift;
- DEBUG_EXECUTE_r( what = "floating" );
- goto hop_and_restart;
- }
- if (t != s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "By STCLASS: moving %ld --> %ld\n",
- (long)(t - i_strpos), (long)(s - i_strpos))
- );
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Does not contradict STCLASS...\n");
- );
- }
- }
- giveup:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n",
- PL_colors[4], (check ? "Guessed" : "Giving up"),
- PL_colors[5], (long)(s - i_strpos)) );
- return s;
-
- fail_finish: /* Substring not found */
- if (prog->check_substr || prog->check_utf8) /* could be removed already */
- BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr) += 5; /* hooray */
- fail:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n",
- PL_colors[4], PL_colors[5]));
- return NULL;
-}
-
-#define DECL_TRIE_TYPE(scan) \
- const enum { trie_plain, trie_utf8, trie_utf8_fold, trie_latin_utf8_fold } \
- trie_type = (scan->flags != EXACT) \
- ? (do_utf8 ? trie_utf8_fold : (UTF ? trie_latin_utf8_fold : trie_plain)) \
- : (do_utf8 ? trie_utf8 : trie_plain)
-
-#define REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, uscan, len, \
-uvc, charid, foldlen, foldbuf, uniflags) STMT_START { \
- switch (trie_type) { \
- case trie_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_latin_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- len = 1; \
- uvc = to_uni_fold( *(U8*)uc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_utf8: \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- break; \
- case trie_plain: \
- uvc = (UV)*uc; \
- len = 1; \
- } \
- if (uvc < 256) { \
- charid = trie->charmap[ uvc ]; \
- } \
- else { \
- charid = 0; \
- if (widecharmap) { \
- SV** const svpp = hv_fetch(widecharmap, \
- (char*)&uvc, sizeof(UV), 0); \
- if (svpp) \
- charid = (U16)SvIV(*svpp); \
- } \
- } \
-} STMT_END
-
-#define REXEC_FBC_EXACTISH_CHECK(CoNd) \
-{ \
- char *my_strend= (char *)strend; \
- if ( (CoNd) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8, \
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- else { \
- U8 foldbuf[UTF8_MAXBYTES_CASE+1]; \
- uvchr_to_utf8(tmpbuf, c); \
- f = to_utf8_fold(tmpbuf, foldbuf, &foldlen); \
- if ( f != c \
- && (f == c1 || f == c2) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8,\
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- } \
-} \
-s += len
-
-#define REXEC_FBC_EXACTISH_SCAN(CoNd) \
-STMT_START { \
- while (s <= e) { \
- if ( (CoNd) \
- && (ln == 1 || !(OP(c) == EXACTF \
- ? ibcmp(s, m, ln) \
- : ibcmp_locale(s, m, ln))) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_SCAN(CoDe) \
-STMT_START { \
- while (s + (uskip = UTF8SKIP(s)) <= strend) { \
- CoDe \
- s += uskip; \
- } \
-} STMT_END
-
-#define REXEC_FBC_SCAN(CoDe) \
-STMT_START { \
- while (s < strend) { \
- CoDe \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_CLASS_SCAN(CoNd) \
-REXEC_FBC_UTF8_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_CLASS_SCAN(CoNd) \
-REXEC_FBC_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_TRYIT \
-if ((!reginfo || regtry(reginfo, &s))) \
- goto got_it
-
-#define REXEC_FBC_CSCAN(CoNdUtF8,CoNd) \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_PRELOAD(UtFpReLoAd,CoNdUtF8,CoNd) \
- if (do_utf8) { \
- UtFpReLoAd; \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_TAINT(CoNdUtF8,CoNd) \
- PL_reg_flags |= RF_tainted; \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define DUMP_EXEC_POS(li,s,doutf8) \
- dump_exec_pos(li,s,(PL_regeol),(PL_bostr),(PL_reg_starttry),doutf8)
-
-/* We know what class REx starts with. Try to find this position... */
-/* if reginfo is NULL, its a dryrun */
-/* annoyingly all the vars in this routine have different names from their counterparts
- in regmatch. /grrr */
-
-STATIC char *
-S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
- const char *strend, regmatch_info *reginfo)
-{
- dVAR;
- const I32 doevery = (prog->intflags & PREGf_SKIP) == 0;
- char *m;
- STRLEN ln;
- STRLEN lnc;
- register STRLEN uskip;
- unsigned int c1;
- unsigned int c2;
- char *e;
- register I32 tmp = 1; /* Scratch variable? */
- register const bool do_utf8 = PL_reg_match_utf8;
- RXi_GET_DECL(prog,progi);
-
- PERL_ARGS_ASSERT_FIND_BYCLASS;
-
- /* We know what class it must start with. */
- switch (OP(c)) {
- case ANYOF:
- if (do_utf8) {
- REXEC_FBC_UTF8_CLASS_SCAN((ANYOF_FLAGS(c) & ANYOF_UNICODE) ||
- !UTF8_IS_INVARIANT((U8)s[0]) ?
- reginclass(prog, c, (U8*)s, 0, do_utf8) :
- REGINCLASS(prog, c, (U8*)s));
- }
- else {
- while (s < strend) {
- STRLEN skip = 1;
-
- if (REGINCLASS(prog, c, (U8*)s) ||
- (ANYOF_FOLD_SHARP_S(c, s, strend) &&
- /* The assignment of 2 is intentional:
- * for the folded sharp s, the skip is 2. */
- (skip = SHARP_S_SKIP))) {
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += skip;
- }
- }
- break;
- case CANY:
- REXEC_FBC_SCAN(
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- );
- break;
- case EXACTF:
- m = STRING(c);
- ln = STR_LEN(c); /* length to match in octets/bytes */
- lnc = (I32) ln; /* length to match in characters */
- if (UTF) {
- STRLEN ulen1, ulen2;
- U8 *sm = (U8 *) m;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
- /* used by commented-out code below */
- /*const U32 uniflags = UTF8_ALLOW_DEFAULT;*/
-
- /* XXX: Since the node will be case folded at compile
- time this logic is a little odd, although im not
- sure that its actually wrong. --dmq */
-
- c1 = to_utf8_lower((U8*)m, tmpbuf1, &ulen1);
- c2 = to_utf8_upper((U8*)m, tmpbuf2, &ulen2);
-
- /* XXX: This is kinda strange. to_utf8_XYZ returns the
- codepoint of the first character in the converted
- form, yet originally we did the extra step.
- No tests fail by commenting this code out however
- so Ive left it out. -- dmq.
-
- c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- */
-
- lnc = 0;
- while (sm < ((U8 *) m + ln)) {
- lnc++;
- sm += UTF8SKIP(sm);
- }
- }
- else {
- c1 = *(U8*)m;
- c2 = PL_fold[c1];
- }
- goto do_exactf;
- case EXACTFL:
- m = STRING(c);
- ln = STR_LEN(c);
- lnc = (I32) ln;
- c1 = *(U8*)m;
- c2 = PL_fold_locale[c1];
- do_exactf:
- e = HOP3c(strend, -((I32)lnc), s);
-
- if (!reginfo && e < s)
- e = s; /* Due to minlen logic of intuit() */
-
- /* The idea in the EXACTF* cases is to first find the
- * first character of the EXACTF* node and then, if
- * necessary, case-insensitively compare the full
- * text of the node. The c1 and c2 are the first
- * characters (though in Unicode it gets a bit
- * more complicated because there are more cases
- * than just upper and lower: one needs to use
- * the so-called folding case for case-insensitive
- * matching (called "loose matching" in Unicode).
- * ibcmp_utf8() will do just that. */
-
- if (do_utf8 || UTF) {
- UV c, f;
- U8 tmpbuf [UTF8_MAXBYTES+1];
- STRLEN len = 1;
- STRLEN foldlen;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- if (c1 == c2) {
- /* Upper and lower of 1st char are equal -
- * probably not a "letter". */
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
- REXEC_FBC_EXACTISH_CHECK(c == c1);
- }
- }
- else {
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
-
- /* Handle some of the three Greek sigmas cases.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (the character class or ANYOF cases)
- * are handled during compiletime in
- * regexec.c:S_regclass(). */
- if (c == (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA ||
- c == (UV)UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA)
- c = (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA;
-
- REXEC_FBC_EXACTISH_CHECK(c == c1 || c == c2);
- }
- }
- }
- else {
- /* Neither pattern nor string are UTF8 */
- if (c1 == c2)
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1);
- else
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1 || *(U8*)s == c2);
- }
- break;
- case BOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == BOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == BOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- if ((!prog->minlen && tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NBOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == NBOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == NBOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == NBOUND ?
- isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- if ((!prog->minlen && !tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case ALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- isALNUM(*s)
- );
- case ALNUML:
- REXEC_FBC_CSCAN_TAINT(
- isALNUM_LC_utf8((U8*)s),
- isALNUM_LC(*s)
- );
- case NALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- !swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- !isALNUM(*s)
- );
- case NALNUML:
- REXEC_FBC_CSCAN_TAINT(
- !isALNUM_LC_utf8((U8*)s),
- !isALNUM_LC(*s)
- );
- case SPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- *s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8),
- isSPACE(*s)
- );
- case SPACEL:
- REXEC_FBC_CSCAN_TAINT(
- *s == ' ' || isSPACE_LC_utf8((U8*)s),
- isSPACE_LC(*s)
- );
- case NSPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- !(*s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8)),
- !isSPACE(*s)
- );
- case NSPACEL:
- REXEC_FBC_CSCAN_TAINT(
- !(*s == ' ' || isSPACE_LC_utf8((U8*)s)),
- !isSPACE_LC(*s)
- );
- case DIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- isDIGIT(*s)
- );
- case DIGITL:
- REXEC_FBC_CSCAN_TAINT(
- isDIGIT_LC_utf8((U8*)s),
- isDIGIT_LC(*s)
- );
- case NDIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- !swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- !isDIGIT(*s)
- );
- case NDIGITL:
- REXEC_FBC_CSCAN_TAINT(
- !isDIGIT_LC_utf8((U8*)s),
- !isDIGIT_LC(*s)
- );
- case LNBREAK:
- REXEC_FBC_CSCAN(
- is_LNBREAK_utf8(s),
- is_LNBREAK_latin1(s)
- );
- case VERTWS:
- REXEC_FBC_CSCAN(
- is_VERTWS_utf8(s),
- is_VERTWS_latin1(s)
- );
- case NVERTWS:
- REXEC_FBC_CSCAN(
- !is_VERTWS_utf8(s),
- !is_VERTWS_latin1(s)
- );
- case HORIZWS:
- REXEC_FBC_CSCAN(
- is_HORIZWS_utf8(s),
- is_HORIZWS_latin1(s)
- );
- case NHORIZWS:
- REXEC_FBC_CSCAN(
- !is_HORIZWS_utf8(s),
- !is_HORIZWS_latin1(s)
- );
- case AHOCORASICKC:
- case AHOCORASICK:
- {
- DECL_TRIE_TYPE(c);
- /* what trie are we using right now */
- reg_ac_data *aho
- = (reg_ac_data*)progi->data->data[ ARG( c ) ];
- reg_trie_data *trie
- = (reg_trie_data*)progi->data->data[ aho->trie ];
- HV *widecharmap = MUTABLE_HV(progi->data->data[ aho->trie + 1 ]);
-
- const char *last_start = strend - trie->minlen;
-#ifdef DEBUGGING
- const char *real_start = s;
-#endif
- STRLEN maxlen = trie->maxlen;
- SV *sv_points;
- U8 **points; /* map of where we were in the input string
- when reading a given char. For ASCII this
- is unnecessary overhead as the relationship
- is always 1:1, but for Unicode, especially
- case folded Unicode this is not true. */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- U8 *bitmap=NULL;
-
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- /* We can't just allocate points here. We need to wrap it in
- * an SV so it gets freed properly if there is a croak while
- * running the match */
- ENTER;
- SAVETMPS;
- sv_points=newSV(maxlen * sizeof(U8 *));
- SvCUR_set(sv_points,
- maxlen * sizeof(U8 *));
- SvPOK_on(sv_points);
- sv_2mortal(sv_points);
- points=(U8**)SvPV_nolen(sv_points );
- if ( trie_type != trie_utf8_fold
- && (trie->bitmap || OP(c)==AHOCORASICKC) )
- {
- if (trie->bitmap)
- bitmap=(U8*)trie->bitmap;
- else
- bitmap=(U8*)ANYOF_BITMAP(c);
- }
- /* this is the Aho-Corasick algorithm modified a touch
- to include special handling for long "unknown char"
- sequences. The basic idea being that we use AC as long
- as we are dealing with a possible matching char, when
- we encounter an unknown char (and we have not encountered
- an accepting state) we scan forward until we find a legal
- starting char.
- AC matching is basically that of trie matching, except
- that when we encounter a failing transition, we fall back
- to the current states "fail state", and try the current char
- again, a process we repeat until we reach the root state,
- state 1, or a legal transition. If we fail on the root state
- then we can either terminate if we have reached an accepting
- state previously, or restart the entire process from the beginning
- if we have not.
-
- */
- while (s <= last_start) {
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- U8 *uc = (U8*)s;
- U16 charid = 0;
- U32 base = 1;
- U32 state = 1;
- UV uvc = 0;
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- U8 *leftmost = NULL;
-#ifdef DEBUGGING
- U32 accepted_word= 0;
-#endif
- U32 pointpos = 0;
-
- while ( state && uc <= (U8*)strend ) {
- int failed=0;
- U32 word = aho->states[ state ].wordnum;
-
- if( state==1 ) {
- if ( bitmap ) {
- DEBUG_TRIE_EXECUTE_r(
- if ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- dump_exec_pos( (char *)uc, c, strend, real_start,
- (char *)uc, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- " Scanning for legal start char...\n");
- }
- );
- while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- uc++;
- }
- s= (char *)uc;
- }
- if (uc >(U8*)last_start) break;
- }
-
- if ( word ) {
- U8 *lpos= points[ (pointpos - trie->wordlen[word-1] ) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=word);
- leftmost= lpos;
- }
- if (base==0) break;
-
- }
- points[pointpos++ % maxlen]= uc;
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
- DEBUG_TRIE_EXECUTE_r({
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf(Perl_debug_log,
- " Charid:%3u CP:%4"UVxf" ",
- charid, uvc);
- });
-
- do {
-#ifdef DEBUGGING
- word = aho->states[ state ].wordnum;
-#endif
- base = aho->states[ state ].trans.base;
-
- DEBUG_TRIE_EXECUTE_r({
- if (failed)
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%sState: %4"UVxf", word=%"UVxf,
- failed ? " Fail transition to " : "",
- (UV)state, (UV)word);
- });
- if ( base ) {
- U32 tmp;
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state
- && (tmp=trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next))
- {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - legal\n"));
- state = tmp;
- break;
- }
- else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - fail\n"));
- failed = 1;
- state = aho->fail[state];
- }
- }
- else {
- /* we must be accepting here */
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - accepting\n"));
- failed = 1;
- break;
- }
- } while(state);
- uc += len;
- if (failed) {
- if (leftmost)
- break;
- if (!state) state = 1;
- }
- }
- if ( aho->states[ state ].wordnum ) {
- U8 *lpos = points[ (pointpos - trie->wordlen[aho->states[ state ].wordnum-1]) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=aho->states[ state ].wordnum);
- leftmost = lpos;
- }
- }
- if (leftmost) {
- s = (char*)leftmost;
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf(
- Perl_debug_log,"Matches word #%"UVxf" at position %"IVdf". Trying full pattern...\n",
- (UV)accepted_word, (IV)(s - real_start)
- );
- });
- if (!reginfo || regtry(reginfo, &s)) {
- FREETMPS;
- LEAVE;
- goto got_it;
- }
- s = HOPc(s,1);
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,"Pattern failed. Looking for new start point...\n");
- });
- } else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,"No match.\n"));
- break;
- }
- }
- FREETMPS;
- LEAVE;
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c));
- break;
- }
- return 0;
- got_it:
- return s;
-}
-
-
-/*
- - regexec_flags - match a regexp against a string
- */
-I32
-Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, register char *strend,
- char *strbeg, I32 minend, SV *sv, void *data, U32 flags)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* data: May be used for some additional optimizations.
- Currently its only used, with a U32 cast, for transmitting
- the ganch offset when doing a /g match. This will change */
-/* nosave: For optimizations. */
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- /*register*/ char *s;
- register regnode *c;
- /*register*/ char *startpos = stringarg;
- I32 minlen; /* must match at least this many chars */
- I32 dontbother = 0; /* how many characters not to try at end */
- I32 end_shift = 0; /* Same for the end. */ /* CC */
- I32 scream_pos = -1; /* Internal iterator of scream. */
- char *scream_olds = NULL;
- const bool do_utf8 = (bool)DO_UTF8(sv);
- I32 multiline;
- RXi_GET_DECL(prog,progi);
- regmatch_info reginfo; /* create some info to pass to regtry etc */
- regexp_paren_pair *swap = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGEXEC_FLAGS;
- PERL_UNUSED_ARG(data);
-
- /* Be paranoid... */
- if (prog == NULL || startpos == NULL) {
- Perl_croak(aTHX_ "NULL regexp parameter");
- return 0;
- }
-
- multiline = prog->extflags & RXf_PMf_MULTILINE;
- reginfo.prog = rx; /* Yes, sorry that this is confusing. */
-
- RX_MATCH_UTF8_set(rx, do_utf8);
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, startpos, strend,
- "Matching");
- );
-
- minlen = prog->minlen;
-
- if (strend - startpos < (minlen+(prog->check_offset_min<0?prog->check_offset_min:0))) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short [regexec_flags]...\n"));
- goto phooey;
- }
-
-
- /* Check validity of program. */
- if (UCHARAT(progi->program) != REG_MAGIC) {
- Perl_croak(aTHX_ "corrupted regexp program");
- }
-
- PL_reg_flags = 0;
- PL_reg_eval_set = 0;
- PL_reg_maxiter = 0;
-
- if (RX_UTF8(rx))
- PL_reg_flags |= RF_utf8;
-
- /* Mark beginning of line for ^ and lookbehind. */
- reginfo.bol = startpos; /* XXX not used ??? */
- PL_bostr = strbeg;
- reginfo.sv = sv;
-
- /* Mark end of line for $ (and such) */
- PL_regeol = strend;
-
- /* see how far we have to get to not match where we matched before */
- reginfo.till = startpos+minend;
-
- /* If there is a "must appear" string, look for it. */
- s = startpos;
-
- if (prog->extflags & RXf_GPOS_SEEN) { /* Need to set reginfo->ganch */
- MAGIC *mg;
- if (flags & REXEC_IGNOREPOS){ /* Means: check only at start */
- reginfo.ganch = startpos + prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS IGNOREPOS: reginfo.ganch = startpos + %"UVxf"\n",(UV)prog->gofs));
- } else if (sv && SvTYPE(sv) >= SVt_PVMG
- && SvMAGIC(sv)
- && (mg = mg_find(sv, PERL_MAGIC_regex_global))
- && mg->mg_len >= 0) {
- reginfo.ganch = strbeg + mg->mg_len; /* Defined pos() */
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS MAGIC: reginfo.ganch = strbeg + %"IVdf"\n",(IV)mg->mg_len));
-
- if (prog->extflags & RXf_ANCH_GPOS) {
- if (s > reginfo.ganch)
- goto phooey;
- s = reginfo.ganch - prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS ANCH_GPOS: s = ganch - %"UVxf"\n",(UV)prog->gofs));
- if (s < strbeg)
- goto phooey;
- }
- }
- else if (data) {
- reginfo.ganch = strbeg + PTR2UV(data);
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS DATA: reginfo.ganch= strbeg + %"UVxf"\n",PTR2UV(data)));
-
- } else { /* pos() not defined */
- reginfo.ganch = strbeg;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS: reginfo.ganch = strbeg\n"));
- }
- }
- if (PL_curpm && (PM_GETRE(PL_curpm) == rx)) {
- /* We have to be careful. If the previous successful match
- was from this regex we don't want a subsequent partially
- successful match to clobber the old results.
- So when we detect this possibility we add a swap buffer
- to the re, and switch the buffer each match. If we fail
- we switch it back, otherwise we leave it swapped.
- */
- swap = prog->offs;
- /* do we need a save destructor here for eval dies? */
- Newxz(prog->offs, (prog->nparens + 1), regexp_paren_pair);
- }
- if (!(flags & REXEC_CHECKED) && (prog->check_substr != NULL || prog->check_utf8 != NULL)) {
- re_scream_pos_data d;
-
- d.scream_olds = &scream_olds;
- d.scream_pos = &scream_pos;
- s = re_intuit_start(rx, sv, s, strend, flags, &d);
- if (!s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not present...\n"));
- goto phooey; /* not present */
- }
- }
-
-
-
- /* Simplest case: anchored match need be tried only once. */
- /* [unless only anchor is BOL and multiline is set] */
- if (prog->extflags & (RXf_ANCH & ~RXf_ANCH_GPOS)) {
- if (s == startpos && regtry(®info, &startpos))
- goto got_it;
- else if (multiline || (prog->intflags & PREGf_IMPLICIT)
- || (prog->extflags & RXf_ANCH_MBOL)) /* XXXX SBOL? */
- {
- char *end;
-
- if (minlen)
- dontbother = minlen - 1;
- end = HOP3c(strend, -dontbother, strbeg) - 1;
- /* for multiline we only have to try after newlines */
- if (prog->check_substr || prog->check_utf8) {
- if (s == startpos)
- goto after_try;
- while (1) {
- if (regtry(®info, &s))
- goto got_it;
- after_try:
- if (s > end)
- goto phooey;
- if (prog->extflags & RXf_USE_INTUIT) {
- s = re_intuit_start(rx, sv, s + 1, strend, flags, NULL);
- if (!s)
- goto phooey;
- }
- else
- s++;
- }
- } else {
- if (s > startpos)
- s--;
- while (s < end) {
- if (*s++ == '\n') { /* don't need PL_utf8skip here */
- if (regtry(®info, &s))
- goto got_it;
- }
- }
- }
- }
- goto phooey;
- } else if (RXf_GPOS_CHECK == (prog->extflags & RXf_GPOS_CHECK))
- {
- /* the warning about reginfo.ganch being used without intialization
- is bogus -- we set it above, when prog->extflags & RXf_GPOS_SEEN
- and we only enter this block when the same bit is set. */
- char *tmp_s = reginfo.ganch - prog->gofs;
-
- if (tmp_s >= strbeg && regtry(®info, &tmp_s))
- goto got_it;
- goto phooey;
- }
-
- /* Messy cases: unanchored match. */
- if ((prog->anchored_substr || prog->anchored_utf8) && prog->intflags & PREGf_SKIP) {
- /* we have /x+whatever/ */
- /* it must be a one character string (XXXX Except UTF?) */
- char ch;
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- ch = SvPVX_const(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)[0];
-
- if (do_utf8) {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s += UTF8SKIP(s);
- while (s < strend && *s == ch)
- s += UTF8SKIP(s);
- }
- );
- }
- else {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s++;
- while (s < strend && *s == ch)
- s++;
- }
- );
- }
- DEBUG_EXECUTE_r(if (!did_match)
- PerlIO_printf(Perl_debug_log,
- "Did not find anchored character...\n")
- );
- }
- else if (prog->anchored_substr != NULL
- || prog->anchored_utf8 != NULL
- || ((prog->float_substr != NULL || prog->float_utf8 != NULL)
- && prog->float_max_offset < strend - s)) {
- SV *must;
- I32 back_max;
- I32 back_min;
- char *last;
- char *last1; /* Last position checked before */
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (prog->anchored_substr || prog->anchored_utf8) {
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- back_max = back_min = prog->anchored_offset;
- } else {
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- back_max = prog->float_max_offset;
- back_min = prog->float_min_offset;
- }
-
-
- if (must == &PL_sv_undef)
- /* could not downgrade utf8 check substring, so must fail */
- goto phooey;
-
- if (back_min<0) {
- last = strend;
- } else {
- last = HOP3c(strend, /* Cannot start after this */
- -(I32)(CHR_SVLEN(must)
- - (SvTAIL(must) != 0) + back_min), strbeg);
- }
- if (s > PL_bostr)
- last1 = HOPc(s, -1);
- else
- last1 = s - 1; /* bogus */
-
- /* XXXX check_substr already used to find "s", can optimize if
- check_substr==must. */
- scream_pos = -1;
- dontbother = end_shift;
- strend = HOPc(strend, -dontbother);
- while ( (s <= last) &&
- ((flags & REXEC_SCREAM)
- ? (s = screaminstr(sv, must, HOP3c(s, back_min, (back_min<0 ? strbeg : strend)) - strbeg,
- end_shift, &scream_pos, 0))
- : (s = fbm_instr((unsigned char*)HOP3(s, back_min, (back_min<0 ? strbeg : strend)),
- (unsigned char*)strend, must,
- multiline ? FBMrf_MULTILINE : 0))) ) {
- /* we may be pointing at the wrong string */
- if ((flags & REXEC_SCREAM) && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- DEBUG_EXECUTE_r( did_match = 1 );
- if (HOPc(s, -back_max) > last1) {
- last1 = HOPc(s, -back_min);
- s = HOPc(s, -back_max);
- }
- else {
- char * const t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1;
-
- last1 = HOPc(s, -back_min);
- s = t;
- }
- if (do_utf8) {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s += UTF8SKIP(s);
- }
- }
- else {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s++;
- }
- }
- }
- DEBUG_EXECUTE_r(if (!did_match) {
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "Did not find %s substr %s%s...\n",
- ((must == prog->anchored_substr || must == prog->anchored_utf8)
- ? "anchored" : "floating"),
- quoted, RE_SV_TAIL(must));
- });
- goto phooey;
- }
- else if ( (c = progi->regstclass) ) {
- if (minlen) {
- const OPCODE op = OP(progi->regstclass);
- /* don't bother with what can't match */
- if (PL_regkind[op] != EXACT && op != CANY && PL_regkind[op] != TRIE)
- strend = HOPc(strend, -(minlen - 1));
- }
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, c);
- {
- RE_PV_QUOTED_DECL(quoted,do_utf8,PERL_DEBUG_PAD_ZERO(1),
- s,strend-s,60);
- PerlIO_printf(Perl_debug_log,
- "Matching stclass %.*s against %s (%d chars)\n",
- (int)SvCUR(prop), SvPVX_const(prop),
- quoted, (int)(strend - s));
- }
- });
- if (find_byclass(prog, c, s, strend, ®info))
- goto got_it;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass... [regexec_flags]\n"));
- }
- else {
- dontbother = 0;
- if (prog->float_substr != NULL || prog->float_utf8 != NULL) {
- /* Trim the end. */
- char *last;
- SV* float_real;
-
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- float_real = do_utf8 ? prog->float_utf8 : prog->float_substr;
-
- if (flags & REXEC_SCREAM) {
- last = screaminstr(sv, float_real, s - strbeg,
- end_shift, &scream_pos, 1); /* last one */
- if (!last)
- last = scream_olds; /* Only one occurrence. */
- /* we may be pointing at the wrong string */
- else if (RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- }
- else {
- STRLEN len;
- const char * const little = SvPV_const(float_real, len);
-
- if (SvTAIL(float_real)) {
- if (memEQ(strend - len + 1, little, len - 1))
- last = strend - len + 1;
- else if (!multiline)
- last = memEQ(strend - len, little, len)
- ? strend - len : NULL;
- else
- goto find_last;
- } else {
- find_last:
- if (len)
- last = rninstr(s, strend, little, little + len);
- else
- last = strend; /* matching "$" */
- }
- }
- if (last == NULL) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%sCan't trim the tail, match fails (should not happen)%s\n",
- PL_colors[4], PL_colors[5]));
- goto phooey; /* Should not happen! */
- }
- dontbother = strend - last + prog->float_min_offset;
- }
- if (minlen && (dontbother < minlen))
- dontbother = minlen - 1;
- strend -= dontbother; /* this one's always in bytes! */
- /* We don't know much -- general case. */
- if (do_utf8) {
- for (;;) {
- if (regtry(®info, &s))
- goto got_it;
- if (s >= strend)
- break;
- s += UTF8SKIP(s);
- };
- }
- else {
- do {
- if (regtry(®info, &s))
- goto got_it;
- } while (s++ < strend);
- }
- }
-
- /* Failure. */
- goto phooey;
-
-got_it:
- Safefree(swap);
- RX_MATCH_TAINTED_set(rx, PL_reg_flags & RF_tainted);
-
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (RXp_PAREN_NAMES(prog))
- (void)hv_iterinit(RXp_PAREN_NAMES(prog));
-
- /* make sure $`, $&, $', and $digit will work later */
- if ( !(flags & REXEC_NOT_FIRST) ) {
- RX_MATCH_COPY_FREE(rx);
- if (flags & REXEC_COPY_STR) {
- const I32 i = PL_regeol - startpos + (stringarg - strbeg);
-#ifdef PERL_OLD_COPY_ON_WRITE
- if ((SvIsCOW(sv)
- || (SvFLAGS(sv) & CAN_COW_MASK) == CAN_COW_FLAGS)) {
- if (DEBUG_C_TEST) {
- PerlIO_printf(Perl_debug_log,
- "Copy on write: regexp capture, type %d\n",
- (int) SvTYPE(sv));
- }
- prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv);
- prog->subbeg = (char *)SvPVX_const(prog->saved_copy);
- assert (SvPOKp(prog->saved_copy));
- } else
-#endif
- {
- RX_MATCH_COPIED_on(rx);
- s = savepvn(strbeg, i);
- prog->subbeg = s;
- }
- prog->sublen = i;
- }
- else {
- prog->subbeg = strbeg;
- prog->sublen = PL_regeol - strbeg; /* strend may have been modified */
- }
- }
-
- return 1;
-
-phooey:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n",
- PL_colors[4], PL_colors[5]));
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (swap) {
- /* we failed :-( roll it back */
- Safefree(prog->offs);
- prog->offs = swap;
- }
-
- return 0;
-}
-
-
-/*
- - regtry - try match at specific point
- */
-STATIC I32 /* 0 failure, 1 success */
-S_regtry(pTHX_ regmatch_info *reginfo, char **startpos)
-{
- dVAR;
- CHECKPOINT lastcp;
- REGEXP *const rx = reginfo->prog;
- regexp *const prog = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTRY;
-
- reginfo->cutpoint=NULL;
-
- if ((prog->extflags & RXf_EVAL_SEEN) && !PL_reg_eval_set) {
- MAGIC *mg;
-
- PL_reg_eval_set = RS_init;
- DEBUG_EXECUTE_r(DEBUG_s(
- PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n",
- (IV)(PL_stack_sp - PL_stack_base));
- ));
- SAVESTACK_CXPOS();
- cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base;
- /* Otherwise OP_NEXTSTATE will free whatever on stack now. */
- SAVETMPS;
- /* Apparently this is not needed, judging by wantarray. */
- /* SAVEI8(cxstack[cxstack_ix].blk_gimme);
- cxstack[cxstack_ix].blk_gimme = G_SCALAR; */
-
- if (reginfo->sv) {
- /* Make $_ available to executed code. */
- if (reginfo->sv != DEFSV) {
- SAVE_DEFSV;
- DEFSV_set(reginfo->sv);
- }
-
- if (!(SvTYPE(reginfo->sv) >= SVt_PVMG && SvMAGIC(reginfo->sv)
- && (mg = mg_find(reginfo->sv, PERL_MAGIC_regex_global)))) {
- /* prepare for quick setting of pos */
-#ifdef PERL_OLD_COPY_ON_WRITE
- if (SvIsCOW(reginfo->sv))
- sv_force_normal_flags(reginfo->sv, 0);
-#endif
- mg = sv_magicext(reginfo->sv, NULL, PERL_MAGIC_regex_global,
- &PL_vtbl_mglob, NULL, 0);
- mg->mg_len = -1;
- }
- PL_reg_magic = mg;
- PL_reg_oldpos = mg->mg_len;
- SAVEDESTRUCTOR_X(restore_pos, prog);
- }
- if (!PL_reg_curpm) {
- Newxz(PL_reg_curpm, 1, PMOP);
-#ifdef USE_ITHREADS
- {
- SV* const repointer = &PL_sv_undef;
- /* this regexp is also owned by the new PL_reg_curpm, which
- will try to free it. */
- av_push(PL_regex_padav, repointer);
- PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav);
- PL_regex_pad = AvARRAY(PL_regex_padav);
- }
-#endif
- }
-#ifdef USE_ITHREADS
- /* It seems that non-ithreads works both with and without this code.
- So for efficiency reasons it seems best not to have the code
- compiled when it is not needed. */
- /* This is safe against NULLs: */
- ReREFCNT_dec(PM_GETRE(PL_reg_curpm));
- /* PM_reg_curpm owns a reference to this regexp. */
- ReREFCNT_inc(rx);
-#endif
- PM_SETRE(PL_reg_curpm, rx);
- PL_reg_oldcurpm = PL_curpm;
- PL_curpm = PL_reg_curpm;
- if (RXp_MATCH_COPIED(prog)) {
- /* Here is a serious problem: we cannot rewrite subbeg,
- since it may be needed if this match fails. Thus
- $` inside (?{}) could fail... */
- PL_reg_oldsaved = prog->subbeg;
- PL_reg_oldsavedlen = prog->sublen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = prog->saved_copy;
-#endif
- RXp_MATCH_COPIED_off(prog);
- }
- else
- PL_reg_oldsaved = NULL;
- prog->subbeg = PL_bostr;
- prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */
- }
- DEBUG_EXECUTE_r(PL_reg_starttry = *startpos);
- prog->offs[0].start = *startpos - PL_bostr;
- PL_reginput = *startpos;
- PL_reglastparen = &prog->lastparen;
- PL_reglastcloseparen = &prog->lastcloseparen;
- prog->lastparen = 0;
- prog->lastcloseparen = 0;
- PL_regsize = 0;
- PL_regoffs = prog->offs;
- if (PL_reg_start_tmpl <= prog->nparens) {
- PL_reg_start_tmpl = prog->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- /* XXXX What this code is doing here?!!! There should be no need
- to do this again and again, PL_reglastparen should take care of
- this! --ilya*/
-
- /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code.
- * Actually, the code in regcppop() (which Ilya may be meaning by
- * PL_reglastparen), is not needed at all by the test suite
- * (op/regexp, op/pat, op/split), but that code is needed otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * Meanwhile, this code *is* needed for the
- * above-mentioned test suite tests to succeed. The common theme
- * on those tests seems to be returning null fields from matches.
- * --jhi updated by dapm */
-#if 1
- if (prog->nparens) {
- regexp_paren_pair *pp = PL_regoffs;
- register I32 i;
- for (i = prog->nparens; i > (I32)*PL_reglastparen; i--) {
- ++pp;
- pp->start = -1;
- pp->end = -1;
- }
- }
-#endif
- REGCP_SET(lastcp);
- if (regmatch(reginfo, progi->program + 1)) {
- PL_regoffs[0].end = PL_reginput - PL_bostr;
- return 1;
- }
- if (reginfo->cutpoint)
- *startpos= reginfo->cutpoint;
- REGCP_UNWIND(lastcp);
- return 0;
-}
-
-
-#define sayYES goto yes
-#define sayNO goto no
-#define sayNO_SILENT goto no_silent
-
-/* we dont use STMT_START/END here because it leads to
- "unreachable code" warnings, which are bogus, but distracting. */
-#define CACHEsayNO \
- if (ST.cache_mask) \
- PL_reg_poscache[ST.cache_offset] |= ST.cache_mask; \
- sayNO
-
-/* this is used to determine how far from the left messages like
- 'failed...' are printed. It should be set such that messages
- are inline with the regop output that created them.
-*/
-#define REPORT_CODE_OFF 32
-
-
-/* Make sure there is a test for this +1 options in re_tests */
-#define TRIE_INITAL_ACCEPT_BUFFLEN 4;
-
-#define CHRTEST_UNINIT -1001 /* c1/c2 haven't been calculated yet */
-#define CHRTEST_VOID -1000 /* the c1/c2 "next char" test should be skipped */
-
-#define SLAB_FIRST(s) (&(s)->states[0])
-#define SLAB_LAST(s) (&(s)->states[PERL_REGMATCH_SLAB_SLOTS-1])
-
-/* grab a new slab and return the first slot in it */
-
-STATIC regmatch_state *
-S_push_slab(pTHX)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- regmatch_slab *s = PL_regmatch_slab->next;
- if (!s) {
- Newx(s, 1, regmatch_slab);
- s->prev = PL_regmatch_slab;
- s->next = NULL;
- PL_regmatch_slab->next = s;
- }
- PL_regmatch_slab = s;
- return SLAB_FIRST(s);
-}
-
-
-/* push a new state then goto it */
-
-#define PUSH_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_state;
-
-/* push a new state with success backtracking, then goto it */
-
-#define PUSH_YES_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_yes_state;
-
-
-
-/*
-
-regmatch() - main matching routine
-
-This is basically one big switch statement in a loop. We execute an op,
-set 'next' to point the next op, and continue. If we come to a point which
-we may need to backtrack to on failure such as (A|B|C), we push a
-backtrack state onto the backtrack stack. On failure, we pop the top
-state, and re-enter the loop at the state indicated. If there are no more
-states to pop, we return failure.
-
-Sometimes we also need to backtrack on success; for example /A+/, where
-after successfully matching one A, we need to go back and try to
-match another one; similarly for lookahead assertions: if the assertion
-completes successfully, we backtrack to the state just before the assertion
-and then carry on. In these cases, the pushed state is marked as
-'backtrack on success too'. This marking is in fact done by a chain of
-pointers, each pointing to the previous 'yes' state. On success, we pop to
-the nearest yes state, discarding any intermediate failure-only states.
-Sometimes a yes state is pushed just to force some cleanup code to be
-called at the end of a successful match or submatch; e.g. (??{$re}) uses
-it to free the inner regex.
-
-Note that failure backtracking rewinds the cursor position, while
-success backtracking leaves it alone.
-
-A pattern is complete when the END op is executed, while a subpattern
-such as (?=foo) is complete when the SUCCESS op is executed. Both of these
-ops trigger the "pop to last yes state if any, otherwise return true"
-behaviour.
-
-A common convention in this function is to use A and B to refer to the two
-subpatterns (or to the first nodes thereof) in patterns like /A*B/: so A is
-the subpattern to be matched possibly multiple times, while B is the entire
-rest of the pattern. Variable and state names reflect this convention.
-
-The states in the main switch are the union of ops and failure/success of
-substates associated with with that op. For example, IFMATCH is the op
-that does lookahead assertions /(?=A)B/ and so the IFMATCH state means
-'execute IFMATCH'; while IFMATCH_A is a state saying that we have just
-successfully matched A and IFMATCH_A_fail is a state saying that we have
-just failed to match A. Resume states always come in pairs. The backtrack
-state we push is marked as 'IFMATCH_A', but when that is popped, we resume
-at IFMATCH_A or IFMATCH_A_fail, depending on whether we are backtracking
-on success or failure.
-
-The struct that holds a backtracking state is actually a big union, with
-one variant for each major type of op. The variable st points to the
-top-most backtrack struct. To make the code clearer, within each
-block of code we #define ST to alias the relevant union.
-
-Here's a concrete example of a (vastly oversimplified) IFMATCH
-implementation:
-
- switch (state) {
- ....
-
-#define ST st->u.ifmatch
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- ST.foo = ...; // some state we wish to save
- ...
- // push a yes backtrack state with a resume value of
- // IFMATCH_A/IFMATCH_A_fail, then continue execution at the
- // first node of A:
- PUSH_YES_STATE_GOTO(IFMATCH_A, A);
- // NOTREACHED
-
- case IFMATCH_A: // we have successfully executed A; now continue with B
- next = B;
- bar = ST.foo; // do something with the preserved value
- break;
-
- case IFMATCH_A_fail: // A failed, so the assertion failed
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
-
-#undef ST
-
- ...
- }
-
-For any old-timers reading this who are familiar with the old recursive
-approach, the code above is equivalent to:
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- {
- int foo = ...
- ...
- if (regmatch(A)) {
- next = B;
- bar = foo;
- break;
- }
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
- }
-
-The topmost backtrack state, pointed to by st, is usually free. If you
-want to claim it, populate any ST.foo fields in it with values you wish to
-save, then do one of
-
- PUSH_STATE_GOTO(resume_state, node);
- PUSH_YES_STATE_GOTO(resume_state, node);
-
-which sets that backtrack state's resume value to 'resume_state', pushes a
-new free entry to the top of the backtrack stack, then goes to 'node'.
-On backtracking, the free slot is popped, and the saved state becomes the
-new free state. An ST.foo field in this new top state can be temporarily
-accessed to retrieve values, but once the main loop is re-entered, it
-becomes available for reuse.
-
-Note that the depth of the backtrack stack constantly increases during the
-left-to-right execution of the pattern, rather than going up and down with
-the pattern nesting. For example the stack is at its maximum at Z at the
-end of the pattern, rather than at X in the following:
-
- /(((X)+)+)+....(Y)+....Z/
-
-The only exceptions to this are lookahead/behind assertions and the cut,
-(?>A), which pop all the backtrack states associated with A before
-continuing.
-
-Bascktrack state structs are allocated in slabs of about 4K in size.
-PL_regmatch_state and st always point to the currently active state,
-and PL_regmatch_slab points to the slab currently containing
-PL_regmatch_state. The first time regmatch() is called, the first slab is
-allocated, and is never freed until interpreter destruction. When the slab
-is full, a new one is allocated and chained to the end. At exit from
-regmatch(), slabs allocated since entry are freed.
-
-*/
-
-
-#define DEBUG_STATE_pp(pp) \
- DEBUG_STATE_r({ \
- DUMP_EXEC_POS(locinput, scan, do_utf8); \
- PerlIO_printf(Perl_debug_log, \
- " %*s"pp" %s%s%s%s%s\n", \
- depth*2, "", \
- PL_reg_name[st->resume_state], \
- ((st==yes_state||st==mark_state) ? "[" : ""), \
- ((st==yes_state) ? "Y" : ""), \
- ((st==mark_state) ? "M" : ""), \
- ((st==yes_state||st==mark_state) ? "]" : "") \
- ); \
- });
-
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-prog) : -1)
-
-#ifdef DEBUGGING
-
-STATIC void
-S_debug_start_match(pTHX_ const REGEXP *prog, const bool do_utf8,
- const char *start, const char *end, const char *blurb)
-{
- const bool utf8_pat = RX_UTF8(prog) ? 1 : 0;
-
- PERL_ARGS_ASSERT_DEBUG_START_MATCH;
-
- if (!PL_colorset)
- reginitcolors();
- {
- RE_PV_QUOTED_DECL(s0, utf8_pat, PERL_DEBUG_PAD_ZERO(0),
- RX_PRECOMP_const(prog), RX_PRELEN(prog), 60);
-
- RE_PV_QUOTED_DECL(s1, do_utf8, PERL_DEBUG_PAD_ZERO(1),
- start, end - start, 60);
-
- PerlIO_printf(Perl_debug_log,
- "%s%s REx%s %s against %s\n",
- PL_colors[4], blurb, PL_colors[5], s0, s1);
-
- if (do_utf8||utf8_pat)
- PerlIO_printf(Perl_debug_log, "UTF-8 %s%s%s...\n",
- utf8_pat ? "pattern" : "",
- utf8_pat && do_utf8 ? " and " : "",
- do_utf8 ? "string" : ""
- );
- }
-}
-
-STATIC void
-S_dump_exec_pos(pTHX_ const char *locinput,
- const regnode *scan,
- const char *loc_regeol,
- const char *loc_bostr,
- const char *loc_reg_starttry,
- const bool do_utf8)
-{
- const int docolor = *PL_colors[0] || *PL_colors[2] || *PL_colors[4];
- const int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */
- int l = (loc_regeol - locinput) > taill ? taill : (loc_regeol - locinput);
- /* The part of the string before starttry has one color
- (pref0_len chars), between starttry and current
- position another one (pref_len - pref0_len chars),
- after the current position the third one.
- We assume that pref0_len <= pref_len, otherwise we
- decrease pref0_len. */
- int pref_len = (locinput - loc_bostr) > (5 + taill) - l
- ? (5 + taill) - l : locinput - loc_bostr;
- int pref0_len;
-
- PERL_ARGS_ASSERT_DUMP_EXEC_POS;
-
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len)))
- pref_len++;
- pref0_len = pref_len - (locinput - loc_reg_starttry);
- if (l + pref_len < (5 + taill) && l < loc_regeol - locinput)
- l = ( loc_regeol - locinput > (5 + taill) - pref_len
- ? (5 + taill) - pref_len : loc_regeol - locinput);
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput + l)))
- l--;
- if (pref0_len < 0)
- pref0_len = 0;
- if (pref0_len > pref_len)
- pref0_len = pref_len;
- {
- const int is_uni = (do_utf8 && OP(scan) != CANY) ? 1 : 0;
-
- RE_PV_COLOR_DECL(s0,len0,is_uni,PERL_DEBUG_PAD(0),
- (locinput - pref_len),pref0_len, 60, 4, 5);
-
- RE_PV_COLOR_DECL(s1,len1,is_uni,PERL_DEBUG_PAD(1),
- (locinput - pref_len + pref0_len),
- pref_len - pref0_len, 60, 2, 3);
-
- RE_PV_COLOR_DECL(s2,len2,is_uni,PERL_DEBUG_PAD(2),
- locinput, loc_regeol - locinput, 10, 0, 1);
-
- const STRLEN tlen=len0+len1+len2;
- PerlIO_printf(Perl_debug_log,
- "%4"IVdf" <%.*s%.*s%s%.*s>%*s|",
- (IV)(locinput - loc_bostr),
- len0, s0,
- len1, s1,
- (docolor ? "" : "> <"),
- len2, s2,
- (int)(tlen > 19 ? 0 : 19 - tlen),
- "");
- }
-}
-
-#endif
-
-/* reg_check_named_buff_matched()
- * Checks to see if a named buffer has matched. The data array of
- * buffer numbers corresponding to the buffer is expected to reside
- * in the regexp->data->data array in the slot stored in the ARG() of
- * node involved. Note that this routine doesn't actually care about the
- * name, that information is not preserved from compilation to execution.
- * Returns the index of the leftmost defined buffer with the given name
- * or 0 if non of the buffers matched.
- */
-STATIC I32
-S_reg_check_named_buff_matched(pTHX_ const regexp *rex, const regnode *scan)
-{
- I32 n;
- RXi_GET_DECL(rex,rexi);
- SV *sv_dat= MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
-
- PERL_ARGS_ASSERT_REG_CHECK_NAMED_BUFF_MATCHED;
-
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- if ((I32)*PL_reglastparen >= nums[n] &&
- PL_regoffs[nums[n]].end != -1)
- {
- return nums[n];
- }
- }
- return 0;
-}
-
-
-/* free all slabs above current one - called during LEAVE_SCOPE */
-
-STATIC void
-S_clear_backtrack_stack(pTHX_ void *p)
-{
- regmatch_slab *s = PL_regmatch_slab->next;
- PERL_UNUSED_ARG(p);
-
- if (!s)
- return;
- PL_regmatch_slab->next = NULL;
- while (s) {
- regmatch_slab * const osl = s;
- s = s->next;
- Safefree(osl);
- }
-}
-
-
-#define SETREX(Re1,Re2) \
- if (PL_reg_eval_set) PM_SETRE((PL_reg_curpm), (Re2)); \
- Re1 = (Re2)
-
-STATIC I32 /* 0 failure, 1 success */
-S_regmatch(pTHX_ regmatch_info *reginfo, regnode *prog)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- dVAR;
- register const bool do_utf8 = PL_reg_match_utf8;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- REGEXP *rex_sv = reginfo->prog;
- regexp *rex = (struct regexp *)SvANY(rex_sv);
- RXi_GET_DECL(rex,rexi);
- I32 oldsave;
- /* the current state. This is a cached copy of PL_regmatch_state */
- register regmatch_state *st;
- /* cache heavy used fields of st in registers */
- register regnode *scan;
- register regnode *next;
- register U32 n = 0; /* general value; init to avoid compiler warning */
- register I32 ln = 0; /* len or last; init to avoid compiler warning */
- register char *locinput = PL_reginput;
- register I32 nextchr; /* is always set to UCHARAT(locinput) */
-
- bool result = 0; /* return value of S_regmatch */
- int depth = 0; /* depth of backtrack stack */
- U32 nochange_depth = 0; /* depth of GOSUB recursion with nochange */
- const U32 max_nochange_depth =
- (3 * rex->nparens > MAX_RECURSE_EVAL_NOCHANGE_DEPTH) ?
- 3 * rex->nparens : MAX_RECURSE_EVAL_NOCHANGE_DEPTH;
- regmatch_state *yes_state = NULL; /* state to pop to on success of
- subpattern */
- /* mark_state piggy backs on the yes_state logic so that when we unwind
- the stack on success we can update the mark_state as we go */
- regmatch_state *mark_state = NULL; /* last mark state we have seen */
- regmatch_state *cur_eval = NULL; /* most recent EVAL_AB state */
- struct regmatch_state *cur_curlyx = NULL; /* most recent curlyx */
- U32 state_num;
- bool no_final = 0; /* prevent failure from backtracking? */
- bool do_cutgroup = 0; /* no_final only until next branch/trie entry */
- char *startpoint = PL_reginput;
- SV *popmark = NULL; /* are we looking for a mark? */
- SV *sv_commit = NULL; /* last mark name seen in failure */
- SV *sv_yes_mark = NULL; /* last mark name we have seen
- during a successfull match */
- U32 lastopen = 0; /* last open we saw */
- bool has_cutgroup = RX_HAS_CUTGROUP(rex) ? 1 : 0;
- SV* const oreplsv = GvSV(PL_replgv);
- /* these three flags are set by various ops to signal information to
- * the very next op. They have a useful lifetime of exactly one loop
- * iteration, and are not preserved or restored by state pushes/pops
- */
- bool sw = 0; /* the condition value in (?(cond)a|b) */
- bool minmod = 0; /* the next "{n,m}" is a "{n,m}?" */
- int logical = 0; /* the following EVAL is:
- 0: (?{...})
- 1: (?(?{...})X|Y)
- 2: (??{...})
- or the following IFMATCH/UNLESSM is:
- false: plain (?=foo)
- true: used as a condition: (?(?=foo))
- */
-#ifdef DEBUGGING
- GET_RE_DEBUG_FLAGS_DECL;
-#endif
-
- PERL_ARGS_ASSERT_REGMATCH;
-
- DEBUG_OPTIMISE_r( DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,"regmatch start\n");
- }));
- /* on first ever call to regmatch, allocate first slab */
- if (!PL_regmatch_slab) {
- Newx(PL_regmatch_slab, 1, regmatch_slab);
- PL_regmatch_slab->prev = NULL;
- PL_regmatch_slab->next = NULL;
- PL_regmatch_state = SLAB_FIRST(PL_regmatch_slab);
- }
-
- oldsave = PL_savestack_ix;
- SAVEDESTRUCTOR_X(S_clear_backtrack_stack, NULL);
- SAVEVPTR(PL_regmatch_slab);
- SAVEVPTR(PL_regmatch_state);
-
- /* grab next free state slot */
- st = ++PL_regmatch_state;
- if (st > SLAB_LAST(PL_regmatch_slab))
- st = PL_regmatch_state = S_push_slab(aTHX);
-
- /* Note that nextchr is a byte even in UTF */
- nextchr = UCHARAT(locinput);
- scan = prog;
- while (scan != NULL) {
-
- DEBUG_EXECUTE_r( {
- SV * const prop = sv_newmortal();
- regnode *rnext=regnext(scan);
- DUMP_EXEC_POS( locinput, scan, do_utf8 );
- regprop(rex, prop, scan);
-
- PerlIO_printf(Perl_debug_log,
- "%3"IVdf":%*s%s(%"IVdf")\n",
- (IV)(scan - rexi->program), depth*2, "",
- SvPVX_const(prop),
- (PL_regkind[OP(scan)] == END || !rnext) ?
- 0 : (IV)(rnext - rexi->program));
- });
-
- next = scan + NEXT_OFF(scan);
- if (next == scan)
- next = NULL;
- state_num = OP(scan);
-
- REH_CALL_EXEC_NODE_HOOK(rex, scan, reginfo, st);
- reenter_switch:
-
- assert(PL_reglastparen == &rex->lastparen);
- assert(PL_reglastcloseparen == &rex->lastcloseparen);
- assert(PL_regoffs == rex->offs);
-
- switch (state_num) {
- case BOL:
- if (locinput == PL_bostr)
- {
- /* reginfo->till = reginfo->bol; */
- break;
- }
- sayNO;
- case MBOL:
- if (locinput == PL_bostr ||
- ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n'))
- {
- break;
- }
- sayNO;
- case SBOL:
- if (locinput == PL_bostr)
- break;
- sayNO;
- case GPOS:
- if (locinput == reginfo->ganch)
- break;
- sayNO;
-
- case KEEPS:
- /* update the startpoint */
- st->u.keeper.val = PL_regoffs[0].start;
- PL_reginput = locinput;
- PL_regoffs[0].start = locinput - PL_bostr;
- PUSH_STATE_GOTO(KEEPS_next, next);
- /*NOT-REACHED*/
- case KEEPS_next_fail:
- /* rollback the start point change */
- PL_regoffs[0].start = st->u.keeper.val;
- sayNO_SILENT;
- /*NOT-REACHED*/
- case EOL:
- goto seol;
- case MEOL:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- break;
- case SEOL:
- seol:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- if (PL_regeol - locinput > 1)
- sayNO;
- break;
- case EOS:
- if (PL_regeol != locinput)
- sayNO;
- break;
- case SANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
- case CANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case REG_ANY:
- if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n')
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
-
-#undef ST
-#define ST st->u.trie
- case TRIEC:
- /* In this case the charclass data is available inline so
- we can fail fast without a lot of extra overhead.
- */
- if (scan->flags == EXACT || !do_utf8) {
- if(!ANYOF_BITMAP_TEST(scan, *locinput)) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case TRIE:
- {
- /* what type of TRIE am I? (utf8 makes this contextual) */
- DECL_TRIE_TYPE(scan);
-
- /* what trie are we using right now */
- reg_trie_data * const trie
- = (reg_trie_data*)rexi->data->data[ ARG( scan ) ];
- HV * widecharmap = MUTABLE_HV(rexi->data->data[ ARG( scan ) + 1 ]);
- U32 state = trie->startstate;
-
- if (trie->bitmap && trie_type != trie_utf8_fold &&
- !TRIE_BITMAP_TEST(trie,*locinput)
- ) {
- if (trie->states[ state ].wordnum) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %smatched empty string...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- break;
- } else {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- }
- }
-
- {
- U8 *uc = ( U8* )locinput;
-
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- STRLEN bufflen=0;
- SV *sv_accept_buff = NULL;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- ST.accepted = 0; /* how many accepting states we have seen */
- ST.B = next;
- ST.jump = trie->jump;
- ST.me = scan;
- /*
- traverse the TRIE keeping track of all accepting states
- we transition through until we get to a failing node.
- */
-
- while ( state && uc <= (U8*)PL_regeol ) {
- U32 base = trie->states[ state ].trans.base;
- UV uvc = 0;
- U16 charid;
- /* We use charid to hold the wordnum as we don't use it
- for charid until after we have done the wordnum logic.
- We define an alias just so that the wordnum logic reads
- more naturally. */
-
-#define got_wordnum charid
- got_wordnum = trie->states[ state ].wordnum;
-
- if ( got_wordnum ) {
- if ( ! ST.accepted ) {
- ENTER;
- SAVETMPS; /* XXX is this necessary? dmq */
- bufflen = TRIE_INITAL_ACCEPT_BUFFLEN;
- sv_accept_buff=newSV(bufflen *
- sizeof(reg_trie_accepted) - 1);
- SvCUR_set(sv_accept_buff, 0);
- SvPOK_on(sv_accept_buff);
- sv_2mortal(sv_accept_buff);
- SAVETMPS;
- ST.accept_buff =
- (reg_trie_accepted*)SvPV_nolen(sv_accept_buff );
- }
- do {
- if (ST.accepted >= bufflen) {
- bufflen *= 2;
- ST.accept_buff =(reg_trie_accepted*)
- SvGROW(sv_accept_buff,
- bufflen * sizeof(reg_trie_accepted));
- }
- SvCUR_set(sv_accept_buff,SvCUR(sv_accept_buff)
- + sizeof(reg_trie_accepted));
-
-
- ST.accept_buff[ST.accepted].wordnum = got_wordnum;
- ST.accept_buff[ST.accepted].endpos = uc;
- ++ST.accepted;
- } while (trie->nextword && (got_wordnum= trie->nextword[got_wordnum]));
- }
-#undef got_wordnum
-
- DEBUG_TRIE_EXECUTE_r({
- DUMP_EXEC_POS( (char *)uc, scan, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%*s %sState: %4"UVxf" Accepted: %4"UVxf" ",
- 2+depth * 2, "", PL_colors[4],
- (UV)state, (UV)ST.accepted );
- });
-
- if ( base ) {
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
-
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state)
- {
- state = trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next;
- }
- else {
- state = 0;
- }
- uc += len;
-
- }
- else {
- state = 0;
- }
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "Charid:%3x CP:%4"UVxf" After State: %4"UVxf"%s\n",
- charid, uvc, (UV)state, PL_colors[5] );
- );
- }
- if (!ST.accepted )
- sayNO;
-
- DEBUG_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" possible matches%s\n",
- REPORT_CODE_OFF + depth * 2, "",
- PL_colors[4], (IV)ST.accepted, PL_colors[5] );
- );
- }}
- goto trie_first_try; /* jump into the fail handler */
- /* NOTREACHED */
- case TRIE_next_fail: /* we failed - try next alterative */
- if ( ST.jump) {
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- }
- trie_first_try:
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
-
- if ( ST.jump) {
- ST.lastparen = *PL_reglastparen;
- REGCP_SET(ST.cp);
- }
- if ( ST.accepted == 1 ) {
- /* only one choice left - just continue */
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ 0 ].wordnum-1, 0 );
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %sonly one match left: #%d <%s>%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[ 0 ].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- )
- : "not compiled under -Dr",
- PL_colors[5] );
- });
- PL_reginput = (char *)ST.accept_buff[ 0 ].endpos;
- /* in this case we free tmps/leave before we call regmatch
- as we wont be using accept_buff again. */
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- if ( !ST.jump || !ST.jump[ST.accept_buff[0].wordnum])
- scan = ST.B;
- else
- scan = ST.me + ST.jump[ST.accept_buff[0].wordnum];
- if (!has_cutgroup) {
- FREETMPS;
- LEAVE;
- } else {
- ST.accepted--;
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- }
-
- continue; /* execute rest of RE */
- }
-
- if ( !ST.accepted-- ) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sTRIE failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- FREETMPS;
- LEAVE;
- sayNO_SILENT;
- /*NOTREACHED*/
- }
-
- /*
- There are at least two accepting states left. Presumably
- the number of accepting states is going to be low,
- typically two. So we simply scan through to find the one
- with lowest wordnum. Once we find it, we swap the last
- state into its place and decrement the size. We then try to
- match the rest of the pattern at the point where the word
- ends. If we succeed, control just continues along the
- regex; if we fail we return here to try the next accepting
- state
- */
-
- {
- U32 best = 0;
- U32 cur;
- for( cur = 1 ; cur <= ST.accepted ; cur++ ) {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" (%d) as best, looking at %"IVdf" (%d)%s\n",
- REPORT_CODE_OFF + depth * 2, "", PL_colors[4],
- (IV)best, ST.accept_buff[ best ].wordnum, (IV)cur,
- ST.accept_buff[ cur ].wordnum, PL_colors[5] );
- );
-
- if (ST.accept_buff[cur].wordnum <
- ST.accept_buff[best].wordnum)
- best = cur;
- }
-
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ best ].wordnum - 1, 0 );
- regnode *nextop=(!ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) ?
- ST.B :
- ST.me + ST.jump[ST.accept_buff[best].wordnum];
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %strying alternation #%d <%s> at node #%d %s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[best].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- ) : "not compiled under -Dr",
- REG_NODE_NUM(nextop),
- PL_colors[5] );
- });
-
- if ( best<ST.accepted ) {
- reg_trie_accepted tmp = ST.accept_buff[ best ];
- ST.accept_buff[ best ] = ST.accept_buff[ ST.accepted ];
- ST.accept_buff[ ST.accepted ] = tmp;
- best = ST.accepted;
- }
- PL_reginput = (char *)ST.accept_buff[ best ].endpos;
- if ( !ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) {
- scan = ST.B;
- } else {
- scan = ST.me + ST.jump[ST.accept_buff[best].wordnum];
- }
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- /* NOTREACHED */
- }
- /* NOTREACHED */
- case TRIE_next:
- /* we dont want to throw this away, see bug 57042*/
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- FREETMPS;
- LEAVE;
- sayYES;
-#undef ST
-
- case EXACT: {
- char *s = STRING(scan);
- ln = STR_LEN(scan);
- if (do_utf8 != UTF) {
- /* The target and the pattern have differing utf8ness. */
- char *l = locinput;
- const char * const e = s + ln;
-
- if (do_utf8) {
- /* The target is utf8, the pattern is not utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*(U8*)s) !=
- utf8n_to_uvuni((U8*)l, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- l += ulen;
- s ++;
- }
- }
- else {
- /* The target is not utf8, the pattern is utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*((U8*)l)) !=
- utf8n_to_uvuni((U8*)s, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- s += ulen;
- l ++;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
- /* The target and the pattern have the same utf8ness. */
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr)
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && memNE(s, locinput, ln))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case EXACTFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case EXACTF: {
- char * const s = STRING(scan);
- ln = STR_LEN(scan);
-
- if (do_utf8 || UTF) {
- /* Either target or the pattern are utf8. */
- const char * const l = locinput;
- char *e = PL_regeol;
-
- if (ibcmp_utf8(s, 0, ln, (bool)UTF,
- l, &e, 0, do_utf8)) {
- /* One more case for the sharp s:
- * pack("U0U*", 0xDF) =~ /ss/i,
- * the 0xC3 0x9F are the UTF-8
- * byte sequence for the U+00DF. */
-
- if (!(do_utf8 &&
- toLOWER(s[0]) == 's' &&
- ln >= 2 &&
- toLOWER(s[1]) == 's' &&
- (U8)l[0] == 0xC3 &&
- e - l >= 2 &&
- (U8)l[1] == 0x9F))
- sayNO;
- }
- locinput = e;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Neither the target and the pattern are utf8. */
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- UCHARAT(s) != ((OP(scan) == EXACTF)
- ? PL_fold : PL_fold_locale)[nextchr])
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && (OP(scan) == EXACTF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln)))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case BOUNDL:
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- case NBOUND:
- /* was last char in word? */
- if (do_utf8) {
- if (locinput == PL_bostr)
- ln = '\n';
- else {
- const U8 * const r = reghop3((U8*)locinput, -1, (U8*)PL_bostr);
-
- ln = utf8n_to_uvchr(r, UTF8SKIP(r), 0, uniflags);
- }
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM_uni(ln);
- LOAD_UTF8_CHARCLASS_ALNUM();
- n = swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8);
- }
- else {
- ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln));
- n = isALNUM_LC_utf8((U8*)locinput);
- }
- }
- else {
- ln = (locinput != PL_bostr) ?
- UCHARAT(locinput - 1) : '\n';
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM(ln);
- n = isALNUM(nextchr);
- }
- else {
- ln = isALNUM_LC(ln);
- n = isALNUM_LC(nextchr);
- }
- }
- if (((!ln) == (!n)) == (OP(scan) == BOUND ||
- OP(scan) == BOUNDL))
- sayNO;
- break;
- case ANYOF:
- if (do_utf8) {
- STRLEN inclasslen = PL_regeol - locinput;
-
- if (!reginclass(rex, scan, (U8*)locinput, &inclasslen, do_utf8))
- goto anyof_fail;
- if (locinput >= PL_regeol)
- sayNO;
- locinput += inclasslen ? inclasslen : UTF8SKIP(locinput);
- nextchr = UCHARAT(locinput);
- break;
- }
- else {
- if (nextchr < 0)
- nextchr = UCHARAT(locinput);
- if (!REGINCLASS(rex, scan, (U8*)locinput))
- goto anyof_fail;
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- }
- anyof_fail:
- /* If we might have the case of the German sharp s
- * in a casefolding Unicode character class. */
-
- if (ANYOF_FOLD_SHARP_S(scan, locinput, PL_regeol)) {
- locinput += SHARP_S_SKIP;
- nextchr = UCHARAT(locinput);
- }
- else
- sayNO;
- break;
- /* Special char classes - The defines start on line 129 or so */
- CCC_TRY_AFF( ALNUM, ALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
- CCC_TRY_NEG(NALNUM, NALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
-
- CCC_TRY_AFF( SPACE, SPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
- CCC_TRY_NEG(NSPACE, NSPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
-
- CCC_TRY_AFF( DIGIT, DIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
- CCC_TRY_NEG(NDIGIT, NDIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
-
- case CLUMP:
- if (locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- LOAD_UTF8_CHARCLASS_MARK();
- if (swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8))
- sayNO;
- locinput += PL_utf8skip[nextchr];
- while (locinput < PL_regeol &&
- swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8))
- locinput += UTF8SKIP(locinput);
- if (locinput > PL_regeol)
- sayNO;
- }
- else
- locinput++;
- nextchr = UCHARAT(locinput);
- break;
-
- case NREFFL:
- {
- char *s;
- char type;
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NREF:
- case NREFF:
- type = OP(scan);
- n = reg_check_named_buff_matched(rex,scan);
-
- if ( n ) {
- type = REF + ( type - NREF );
- goto do_ref;
- } else {
- sayNO;
- }
- /* unreached */
- case REFFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case REF:
- case REFF:
- n = ARG(scan); /* which paren pair */
- type = OP(scan);
- do_ref:
- ln = PL_regoffs[n].start;
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (*PL_reglastparen < n || ln == -1)
- sayNO; /* Do not match unless seen CLOSEn. */
- if (ln == PL_regoffs[n].end)
- break;
-
- s = PL_bostr + ln;
- if (do_utf8 && type != REF) { /* REF can do byte comparison */
- char *l = locinput;
- const char *e = PL_bostr + PL_regoffs[n].end;
- /*
- * Note that we can't do the "other character" lookup trick as
- * in the 8-bit case (no pun intended) because in Unicode we
- * have to map both upper and title case to lower case.
- */
- if (type == REFF) {
- while (s < e) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- if (l >= PL_regeol)
- sayNO;
- toLOWER_utf8((U8*)s, tmpbuf1, &ulen1);
- toLOWER_utf8((U8*)l, tmpbuf2, &ulen2);
- if (ulen1 != ulen2 || memNE((char *)tmpbuf1, (char *)tmpbuf2, ulen1))
- sayNO;
- s += ulen1;
- l += ulen2;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- (type == REF ||
- (UCHARAT(s) != (type == REFF
- ? PL_fold : PL_fold_locale)[nextchr])))
- sayNO;
- ln = PL_regoffs[n].end - ln;
- if (locinput + ln > PL_regeol)
- sayNO;
- if (ln > 1 && (type == REF
- ? memNE(s, locinput, ln)
- : (type == REFF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln))))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case NOTHING:
- case TAIL:
- break;
- case BACK:
- break;
-
-#undef ST
-#define ST st->u.eval
- {
- SV *ret;
- REGEXP *re_sv;
- regexp *re;
- regexp_internal *rei;
- regnode *startpoint;
-
- case GOSTART:
- case GOSUB: /* /(...(?1))/ /(...(?&foo))/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if (cur_eval->u.eval.close_paren == (U32)ARG(scan))
- Perl_croak(aTHX_ "Infinite recursion in regex");
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_
- "Pattern subroutine nesting without pos change"
- " exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- re_sv = rex_sv;
- re = rex;
- rei = rexi;
- (void)ReREFCNT_inc(rex_sv);
- if (OP(scan)==GOSUB) {
- startpoint = scan + ARG2L(scan);
- ST.close_paren = ARG(scan);
- } else {
- startpoint = rei->program+1;
- ST.close_paren = 0;
- }
- goto eval_recurse_doit;
- /* NOTREACHED */
- case EVAL: /* /(?{A})B/ /(??{A})B/ and /(?(?{A})X|Y)B/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_ "EVAL without pos change exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- {
- /* execute the code in the {...} */
- dSP;
- SV ** const before = SP;
- OP_4tree * const oop = PL_op;
- COP * const ocurcop = PL_curcop;
- PAD *old_comppad;
- char *saved_regeol = PL_regeol;
-
- n = ARG(scan);
- PL_op = (OP_4tree*)rexi->data->data[n];
- DEBUG_STATE_r( PerlIO_printf(Perl_debug_log,
- " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) );
- PAD_SAVE_LOCAL(old_comppad, (PAD*)rexi->data->data[n + 2]);
- PL_regoffs[0].end = PL_reg_magic->mg_len = locinput - PL_bostr;
-
- if (sv_yes_mark) {
- SV *sv_mrk = get_sv("REGMARK", 1);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- CALLRUNOPS(aTHX); /* Scalar context. */
- SPAGAIN;
- if (SP == before)
- ret = &PL_sv_undef; /* protect against empty (?{}) blocks. */
- else {
- ret = POPs;
- PUTBACK;
- }
-
- PL_op = oop;
- PAD_RESTORE_LOCAL(old_comppad);
- PL_curcop = ocurcop;
- PL_regeol = saved_regeol;
- if (!logical) {
- /* /(?{...})/ */
- sv_setsv(save_scalar(PL_replgv), ret);
- break;
- }
- }
- if (logical == 2) { /* Postponed subexpression: /(??{...})/ */
- logical = 0;
- {
- /* extract RE object from returned value; compiling if
- * necessary */
- MAGIC *mg = NULL;
- REGEXP *rx = NULL;
-
- if (SvROK(ret)) {
- SV *const sv = SvRV(ret);
-
- if (SvTYPE(sv) == SVt_REGEXP) {
- rx = (REGEXP*) sv;
- } else if (SvSMAGICAL(sv)) {
- mg = mg_find(sv, PERL_MAGIC_qr);
- assert(mg);
- }
- } else if (SvTYPE(ret) == SVt_REGEXP) {
- rx = (REGEXP*) ret;
- } else if (SvSMAGICAL(ret)) {
- if (SvGMAGICAL(ret)) {
- /* I don't believe that there is ever qr magic
- here. */
- assert(!mg_find(ret, PERL_MAGIC_qr));
- sv_unmagic(ret, PERL_MAGIC_qr);
- }
- else {
- mg = mg_find(ret, PERL_MAGIC_qr);
- /* testing suggests mg only ends up non-NULL for
- scalars who were upgraded and compiled in the
- else block below. In turn, this is only
- triggered in the "postponed utf8 string" tests
- in t/op/pat.t */
- }
- }
-
- if (mg) {
- rx = (REGEXP *) mg->mg_obj; /*XXX:dmq*/
- assert(rx);
- }
- if (rx) {
- rx = reg_temp_copy(NULL, rx);
- }
- else {
- U32 pm_flags = 0;
- const I32 osize = PL_regsize;
-
- if (DO_UTF8(ret)) {
- assert (SvUTF8(ret));
- } else if (SvUTF8(ret)) {
- /* Not doing UTF-8, despite what the SV says. Is
- this only if we're trapped in use 'bytes'? */
- /* Make a copy of the octet sequence, but without
- the flag on, as the compiler now honours the
- SvUTF8 flag on ret. */
- STRLEN len;
- const char *const p = SvPV(ret, len);
- ret = newSVpvn_flags(p, len, SVs_TEMP);
- }
- rx = CALLREGCOMP(ret, pm_flags);
- if (!(SvFLAGS(ret)
- & (SVs_TEMP | SVs_PADTMP | SVf_READONLY
- | SVs_GMG))) {
- /* This isn't a first class regexp. Instead, it's
- caching a regexp onto an existing, Perl visible
- scalar. */
- sv_magic(ret, MUTABLE_SV(rx), PERL_MAGIC_qr, 0, 0);
- }
- PL_regsize = osize;
- }
- re_sv = rx;
- re = (struct regexp *)SvANY(rx);
- }
- RXp_MATCH_COPIED_off(re);
- re->subbeg = rex->subbeg;
- re->sublen = rex->sublen;
- rei = RXi_GET(re);
- DEBUG_EXECUTE_r(
- debug_start_match(re_sv, do_utf8, locinput, PL_regeol,
- "Matching embedded");
- );
- startpoint = rei->program + 1;
- ST.close_paren = 0; /* only used for GOSUB */
- /* borrowed from regtry */
- if (PL_reg_start_tmpl <= re->nparens) {
- PL_reg_start_tmpl = re->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- eval_recurse_doit: /* Share code with GOSUB below this line */
- /* run the pattern returned from (??{...}) */
- ST.cp = regcppush(0); /* Save *all* the positions. */
- REGCP_SET(ST.lastcp);
-
- PL_regoffs = re->offs; /* essentially NOOP on GOSUB */
-
- /* see regtry, specifically PL_reglast(?:close)?paren is a pointer! (i dont know why) :dmq */
- PL_reglastparen = &re->lastparen;
- PL_reglastcloseparen = &re->lastcloseparen;
- re->lastparen = 0;
- re->lastcloseparen = 0;
-
- PL_reginput = locinput;
- PL_regsize = 0;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
-
- ST.toggle_reg_flags = PL_reg_flags;
- if (RX_UTF8(re_sv))
- PL_reg_flags |= RF_utf8;
- else
- PL_reg_flags &= ~RF_utf8;
- ST.toggle_reg_flags ^= PL_reg_flags; /* diff of old and new */
-
- ST.prev_rex = rex_sv;
- ST.prev_curlyx = cur_curlyx;
- SETREX(rex_sv,re_sv);
- rex = re;
- rexi = rei;
- cur_curlyx = NULL;
- ST.B = next;
- ST.prev_eval = cur_eval;
- cur_eval = st;
- /* now continue from first node in postoned RE */
- PUSH_YES_STATE_GOTO(EVAL_AB, startpoint);
- /* NOTREACHED */
- }
- /* logical is 1, /(?(?{...})X|Y)/ */
- sw = (bool)SvTRUE(ret);
- logical = 0;
- break;
- }
-
- case EVAL_AB: /* cleanup after a successful (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- regcpblow(ST.cp);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
- /* also update PL_regoffs */
- PL_regoffs = rex->offs;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayYES;
-
-
- case EVAL_AB_fail: /* unsuccessfully ran A or B in (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- PL_reginput = locinput;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayNO_SILENT;
-#undef ST
-
- case OPEN:
- n = ARG(scan); /* which paren pair */
- PL_reg_start_tmp[n] = locinput;
- if (n > PL_regsize)
- PL_regsize = n;
- lastopen = n;
- break;
- case CLOSE:
- n = ARG(scan); /* which paren pair */
- PL_regoffs[n].start = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if (cur_eval && cur_eval->u.eval.close_paren == n) {
- goto fake_end;
- }
- break;
- case ACCEPT:
- if (ARG(scan)){
- regnode *cursor;
- for (cursor=scan;
- cursor && OP(cursor)!=END;
- cursor=regnext(cursor))
- {
- if ( OP(cursor)==CLOSE ){
- n = ARG(cursor);
- if ( n <= lastopen ) {
- PL_regoffs[n].start
- = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if ( n == ARG(scan) || (cur_eval &&
- cur_eval->u.eval.close_paren == n))
- break;
- }
- }
- }
- }
- goto fake_end;
- /*NOTREACHED*/
- case GROUPP:
- n = ARG(scan); /* which paren pair */
- sw = (bool)(*PL_reglastparen >= n && PL_regoffs[n].end != -1);
- break;
- case NGROUPP:
- /* reg_check_named_buff_matched returns 0 for no match */
- sw = (bool)(0 < reg_check_named_buff_matched(rex,scan));
- break;
- case INSUBP:
- n = ARG(scan);
- sw = (cur_eval && (!n || cur_eval->u.eval.close_paren == n));
- break;
- case DEFINEP:
- sw = 0;
- break;
- case IFTHEN:
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (sw)
- next = NEXTOPER(NEXTOPER(scan));
- else {
- next = scan + ARG(scan);
- if (OP(next) == IFTHEN) /* Fake one. */
- next = NEXTOPER(NEXTOPER(next));
- }
- break;
- case LOGICAL:
- logical = scan->flags;
- break;
-
-/*******************************************************************
-
-The CURLYX/WHILEM pair of ops handle the most generic case of the /A*B/
-pattern, where A and B are subpatterns. (For simple A, CURLYM or
-STAR/PLUS/CURLY/CURLYN are used instead.)
-
-A*B is compiled as <CURLYX><A><WHILEM><B>
-
-On entry to the subpattern, CURLYX is called. This pushes a CURLYX
-state, which contains the current count, initialised to -1. It also sets
-cur_curlyx to point to this state, with any previous value saved in the
-state block.
-
-CURLYX then jumps straight to the WHILEM op, rather than executing A,
-since the pattern may possibly match zero times (i.e. it's a while {} loop
-rather than a do {} while loop).
-
-Each entry to WHILEM represents a successful match of A. The count in the
-CURLYX block is incremented, another WHILEM state is pushed, and execution
-passes to A or B depending on greediness and the current count.
-
-For example, if matching against the string a1a2a3b (where the aN are
-substrings that match /A/), then the match progresses as follows: (the
-pushed states are interspersed with the bits of strings matched so far):
-
- <CURLYX cnt=-1>
- <CURLYX cnt=0><WHILEM>
- <CURLYX cnt=1><WHILEM> a1 <WHILEM>
- <CURLYX cnt=2><WHILEM> a1 <WHILEM> a2 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> b
-
-(Contrast this with something like CURLYM, which maintains only a single
-backtrack state:
-
- <CURLYM cnt=0> a1
- a1 <CURLYM cnt=1> a2
- a1 a2 <CURLYM cnt=2> a3
- a1 a2 a3 <CURLYM cnt=3> b
-)
-
-Each WHILEM state block marks a point to backtrack to upon partial failure
-of A or B, and also contains some minor state data related to that
-iteration. The CURLYX block, pointed to by cur_curlyx, contains the
-overall state, such as the count, and pointers to the A and B ops.
-
-This is complicated slightly by nested CURLYX/WHILEM's. Since cur_curlyx
-must always point to the *current* CURLYX block, the rules are:
-
-When executing CURLYX, save the old cur_curlyx in the CURLYX state block,
-and set cur_curlyx to point the new block.
-
-When popping the CURLYX block after a successful or unsuccessful match,
-restore the previous cur_curlyx.
-
-When WHILEM is about to execute B, save the current cur_curlyx, and set it
-to the outer one saved in the CURLYX block.
-
-When popping the WHILEM block after a successful or unsuccessful B match,
-restore the previous cur_curlyx.
-
-Here's an example for the pattern (AI* BI)*BO
-I and O refer to inner and outer, C and W refer to CURLYX and WHILEM:
-
-cur_
-curlyx backtrack stack
------- ---------------
-NULL
-CO <CO prev=NULL> <WO>
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-NULL <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi <WO prev=CO> bo
-
-At this point the pattern succeeds, and we work back down the stack to
-clean up, restoring as we go:
-
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO>
-NULL
-
-*******************************************************************/
-
-#define ST st->u.curlyx
-
- case CURLYX: /* start of /A*B/ (for complex A) */
- {
- /* No need to save/restore up to this paren */
- I32 parenfloor = scan->flags;
-
- assert(next); /* keep Coverity happy */
- if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */
- next += ARG(next);
-
- /* XXXX Probably it is better to teach regpush to support
- parenfloor > PL_regsize... */
- if (parenfloor > (I32)*PL_reglastparen)
- parenfloor = *PL_reglastparen; /* Pessimization... */
-
- ST.prev_curlyx= cur_curlyx;
- cur_curlyx = st;
- ST.cp = PL_savestack_ix;
-
- /* these fields contain the state of the current curly.
- * they are accessed by subsequent WHILEMs */
- ST.parenfloor = parenfloor;
- ST.min = ARG1(scan);
- ST.max = ARG2(scan);
- ST.A = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- ST.B = next;
- ST.minmod = minmod;
- minmod = 0;
- ST.count = -1; /* this will be updated by WHILEM */
- ST.lastloc = NULL; /* this will be updated by WHILEM */
-
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYX_end, PREVOPER(next));
- /* NOTREACHED */
- }
-
- case CURLYX_end: /* just finished matching all of A*B */
- cur_curlyx = ST.prev_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case CURLYX_end_fail: /* just failed to match all of A*B */
- regcpblow(ST.cp);
- cur_curlyx = ST.prev_curlyx;
- sayNO;
- /* NOTREACHED */
-
-
-#undef ST
-#define ST st->u.whilem
-
- case WHILEM: /* just matched an A in /A*B/ (for complex A) */
- {
- /* see the discussion above about CURLYX/WHILEM */
- I32 n;
- assert(cur_curlyx); /* keep Coverity happy */
- n = ++cur_curlyx->u.curlyx.count; /* how many A's matched */
- ST.save_lastloc = cur_curlyx->u.curlyx.lastloc;
- ST.cache_offset = 0;
- ST.cache_mask = 0;
-
- PL_reginput = locinput;
-
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: matched %ld out of %ld..%ld\n",
- REPORT_CODE_OFF+depth*2, "", (long)n,
- (long)cur_curlyx->u.curlyx.min,
- (long)cur_curlyx->u.curlyx.max)
- );
-
- /* First just match a string of min A's. */
-
- if (n < cur_curlyx->u.curlyx.min) {
- cur_curlyx->u.curlyx.lastloc = locinput;
- PUSH_STATE_GOTO(WHILEM_A_pre, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
-
- /* If degenerate A matches "", assume A done. */
-
- if (locinput == cur_curlyx->u.curlyx.lastloc) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: empty match detected, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- goto do_whilem_B_max;
- }
-
- /* super-linear cache processing */
-
- if (scan->flags) {
-
- if (!PL_reg_maxiter) {
- /* start the countdown: Postpone detection until we
- * know the match is not *that* much linear. */
- PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4);
- /* possible overflow for long strings and many CURLYX's */
- if (PL_reg_maxiter < 0)
- PL_reg_maxiter = I32_MAX;
- PL_reg_leftiter = PL_reg_maxiter;
- }
-
- if (PL_reg_leftiter-- == 0) {
- /* initialise cache */
- const I32 size = (PL_reg_maxiter + 7)/8;
- if (PL_reg_poscache) {
- if ((I32)PL_reg_poscache_size < size) {
- Renew(PL_reg_poscache, size, char);
- PL_reg_poscache_size = size;
- }
- Zero(PL_reg_poscache, size, char);
- }
- else {
- PL_reg_poscache_size = size;
- Newxz(PL_reg_poscache, size, char);
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%swhilem: Detected a super-linear match, switching on caching%s...\n",
- PL_colors[4], PL_colors[5])
- );
- }
-
- if (PL_reg_leftiter < 0) {
- /* have we already failed at this position? */
- I32 offset, mask;
- offset = (scan->flags & 0xf) - 1
- + (locinput - PL_bostr) * (scan->flags>>4);
- mask = 1 << (offset % 8);
- offset /= 8;
- if (PL_reg_poscache[offset] & mask) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: (cache) already tried at this position...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- sayNO; /* cache records failure */
- }
- ST.cache_offset = offset;
- ST.cache_mask = mask;
- }
- }
-
- /* Prefer B over A for minimal matching. */
-
- if (cur_curlyx->u.curlyx.minmod) {
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- ST.cp = regcppush(ST.save_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_YES_STATE_GOTO(WHILEM_B_min, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
- }
-
- /* Prefer A over B for maximal matching. */
-
- if (n < cur_curlyx->u.curlyx.max) { /* More greed allowed? */
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- cur_curlyx->u.curlyx.lastloc = locinput;
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_max, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
- goto do_whilem_B_max;
- }
- /* NOTREACHED */
-
- case WHILEM_B_min: /* just matched B in a minimal match */
- case WHILEM_B_max: /* just matched B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case WHILEM_B_max_fail: /* just failed to match B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_min_fail: /* just failed to match A in a minimal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- /* FALL THROUGH */
- case WHILEM_A_pre_fail: /* just failed to match even minimal A */
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_max_fail: /* just failed to match A in a maximal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex); /* Restore some previous $<digit>s? */
- PL_reginput = locinput;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s whilem: failed, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- do_whilem_B_max:
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
-
- /* now try B */
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- PUSH_YES_STATE_GOTO(WHILEM_B_max, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
-
- case WHILEM_B_min_fail: /* just failed to match B in a minimal match */
- cur_curlyx = ST.save_curlyx;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
-
- if (cur_curlyx->u.curlyx.count >= cur_curlyx->u.curlyx.max) {
- /* Maximum greed exceeded */
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP),
- "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s trying longer...\n", REPORT_CODE_OFF+depth*2, "")
- );
- /* Try grabbing another A and see if it helps. */
- PL_reginput = locinput;
- cur_curlyx->u.curlyx.lastloc = locinput;
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_min, ST.save_curlyx->u.curlyx.A);
- /* NOTREACHED */
-
-#undef ST
-#define ST st->u.branch
-
- case BRANCHJ: /* /(...|A|...)/ with long next pointer */
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- scan = NEXTOPER(scan);
- /* FALL THROUGH */
-
- case BRANCH: /* /(...|A|...)/ */
- scan = NEXTOPER(scan); /* scan now points to inner node */
- ST.lastparen = *PL_reglastparen;
- ST.next_branch = next;
- REGCP_SET(ST.cp);
- PL_reginput = locinput;
-
- /* Now go into the branch */
- if (has_cutgroup) {
- PUSH_YES_STATE_GOTO(BRANCH_next, scan);
- } else {
- PUSH_STATE_GOTO(BRANCH_next, scan);
- }
- /* NOTREACHED */
- case CUTGROUP:
- PL_reginput = locinput;
- sv_yes_mark = st->u.mark.mark_name = scan->flags ? NULL :
- MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(CUTGROUP_next,next);
- /* NOTREACHED */
- case CUTGROUP_next_fail:
- do_cutgroup = 1;
- no_final = 1;
- if (st->u.mark.mark_name)
- sv_commit = st->u.mark.mark_name;
- sayNO;
- /* NOTREACHED */
- case BRANCH_next:
- sayYES;
- /* NOTREACHED */
- case BRANCH_next_fail: /* that branch failed; try the next, if any */
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- /*dmq: *PL_reglastcloseparen = n; */
- scan = ST.next_branch;
- /* no more branches? */
- if (!scan || (OP(scan) != BRANCH && OP(scan) != BRANCHJ)) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sBRANCH failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- sayNO_SILENT;
- }
- continue; /* execute next BRANCH[J] op */
- /* NOTREACHED */
-
- case MINMOD:
- minmod = 1;
- break;
-
-#undef ST
-#define ST st->u.curlym
-
- case CURLYM: /* /A{m,n}B/ where A is fixed-length */
-
- /* This is an optimisation of CURLYX that enables us to push
- * only a single backtracking state, no matter how many matches
- * there are in {m,n}. It relies on the pattern being constant
- * length, with no parens to influence future backrefs
- */
-
- ST.me = scan;
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
-
- /* if paren positive, emulate an OPEN/CLOSE around A */
- if (ST.me->flags) {
- U32 paren = ST.me->flags;
- if (paren > PL_regsize)
- PL_regsize = paren;
- if (paren > *PL_reglastparen)
- *PL_reglastparen = paren;
- scan += NEXT_OFF(scan); /* Skip former OPEN. */
- }
- ST.A = scan;
- ST.B = next;
- ST.alen = 0;
- ST.count = 0;
- ST.minmod = minmod;
- minmod = 0;
- ST.c1 = CHRTEST_UNINIT;
- REGCP_SET(ST.cp);
-
- if (!(ST.minmod ? ARG1(ST.me) : ARG2(ST.me))) /* min/max */
- goto curlym_do_B;
-
- curlym_do_A: /* execute the A in /A{m,n}B/ */
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYM_A, ST.A); /* match A */
- /* NOTREACHED */
-
- case CURLYM_A: /* we've just matched an A */
- locinput = st->locinput;
- nextchr = UCHARAT(locinput);
-
- ST.count++;
- /* after first match, determine A's length: u.curlym.alen */
- if (ST.count == 1) {
- if (PL_reg_match_utf8) {
- char *s = locinput;
- while (s < PL_reginput) {
- ST.alen++;
- s += UTF8SKIP(s);
- }
- }
- else {
- ST.alen = PL_reginput - locinput;
- }
- if (ST.alen == 0)
- ST.count = ST.minmod ? ARG1(ST.me) : ARG2(ST.me);
- }
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM now matched %"IVdf" times, len=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)), "",
- (IV) ST.count, (IV)ST.alen)
- );
-
- locinput = PL_reginput;
-
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- goto fake_end;
-
- {
- I32 max = (ST.minmod ? ARG1(ST.me) : ARG2(ST.me));
- if ( max == REG_INFTY || ST.count < max )
- goto curlym_do_A; /* try to match another A */
- }
- goto curlym_do_B; /* try to match B */
-
- case CURLYM_A_fail: /* just failed to match an A */
- REGCP_UNWIND(ST.cp);
-
- if (ST.minmod || ST.count < ARG1(ST.me) /* min*/
- || (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags))
- sayNO;
-
- curlym_do_B: /* execute the B in /A{m,n}B/ */
- PL_reginput = locinput;
- if (ST.c1 == CHRTEST_UNINIT) {
- /* calculate c1 and c2 for possible match of 1st char
- * following curly */
- ST.c1 = ST.c2 = CHRTEST_VOID;
- if (HAS_TEXT(ST.B) || JUMPABLE(ST.B)) {
- regnode *text_node = ST.B;
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
- /* this used to be
-
- (HAS_TEXT(text_node) && PL_regkind[OP(text_node)] == EXACT)
-
- But the former is redundant in light of the latter.
-
- if this changes back then the macro for
- IS_TEXT and friends need to change.
- */
- if (PL_regkind[OP(text_node)] == EXACT)
- {
-
- ST.c1 = (U8)*STRING(text_node);
- ST.c2 =
- (IS_TEXTF(text_node))
- ? PL_fold[ST.c1]
- : (IS_TEXTFL(text_node))
- ? PL_fold_locale[ST.c1]
- : ST.c1;
- }
- }
- }
-
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM trying tail with matches=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)),
- "", (IV)ST.count)
- );
- if (ST.c1 != CHRTEST_VOID
- && UCHARAT(PL_reginput) != ST.c1
- && UCHARAT(PL_reginput) != ST.c2)
- {
- /* simulate B failing */
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM Fast bail c1=%"IVdf" c2=%"IVdf"\n",
- (int)(REPORT_CODE_OFF+(depth*2)),"",
- (IV)ST.c1,(IV)ST.c2
- ));
- state_num = CURLYM_B_fail;
- goto reenter_switch;
- }
-
- if (ST.me->flags) {
- /* mark current A as captured */
- I32 paren = ST.me->flags;
- if (ST.count) {
- PL_regoffs[paren].start
- = HOPc(PL_reginput, -ST.alen) - PL_bostr;
- PL_regoffs[paren].end = PL_reginput - PL_bostr;
- /*dmq: *PL_reglastcloseparen = paren; */
- }
- else
- PL_regoffs[paren].end = -1;
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- {
- if (ST.count)
- goto fake_end;
- else
- sayNO;
- }
- }
-
- PUSH_STATE_GOTO(CURLYM_B, ST.B); /* match B */
- /* NOTREACHED */
-
- case CURLYM_B_fail: /* just failed to match a B */
- REGCP_UNWIND(ST.cp);
- if (ST.minmod) {
- I32 max = ARG2(ST.me);
- if (max != REG_INFTY && ST.count == max)
- sayNO;
- goto curlym_do_A; /* try to match a further A */
- }
- /* backtrack one A */
- if (ST.count == ARG1(ST.me) /* min */)
- sayNO;
- ST.count--;
- locinput = HOPc(locinput, -ST.alen);
- goto curlym_do_B; /* try to match B */
-
-#undef ST
-#define ST st->u.curly
-
-#define CURLY_SETPAREN(paren, success) \
- if (paren) { \
- if (success) { \
- PL_regoffs[paren].start = HOPc(locinput, -1) - PL_bostr; \
- PL_regoffs[paren].end = locinput - PL_bostr; \
- *PL_reglastcloseparen = paren; \
- } \
- else \
- PL_regoffs[paren].end = -1; \
- }
-
- case STAR: /* /A*B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 0;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case PLUS: /* /A+B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 1;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case CURLYN: /* /(A){m,n}B/ where A is width 1 */
- ST.paren = scan->flags; /* Which paren to set */
- if (ST.paren > PL_regsize)
- PL_regsize = ST.paren;
- if (ST.paren > *PL_reglastparen)
- *PL_reglastparen = ST.paren;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- ST.min=1;
- ST.max=1;
- }
- scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE);
- goto repeat;
- case CURLY: /* /A{m,n}B/ where A is width 1 */
- ST.paren = 0;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
- repeat:
- /*
- * Lookahead to avoid useless match attempts
- * when we know what character comes next.
- *
- * Used to only do .*x and .*?x, but now it allows
- * for )'s, ('s and (?{ ... })'s to be in the way
- * of the quantifier and the EXACT-like node. -- japhy
- */
-
- if (ST.min > ST.max) /* XXX make this a compile-time check? */
- sayNO;
- if (HAS_TEXT(next) || JUMPABLE(next)) {
- U8 *s;
- regnode *text_node = next;
-
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
-
- if (! HAS_TEXT(text_node))
- ST.c1 = ST.c2 = CHRTEST_VOID;
- else {
- if ( PL_regkind[OP(text_node)] != EXACT ) {
- ST.c1 = ST.c2 = CHRTEST_VOID;
- goto assume_ok_easy;
- }
- else
- s = (U8*)STRING(text_node);
-
- /* Currently we only get here when
-
- PL_rekind[OP(text_node)] == EXACT
-
- if this changes back then the macro for IS_TEXT and
- friends need to change. */
- if (!UTF) {
- ST.c2 = ST.c1 = *s;
- if (IS_TEXTF(text_node))
- ST.c2 = PL_fold[ST.c1];
- else if (IS_TEXTFL(text_node))
- ST.c2 = PL_fold_locale[ST.c1];
- }
- else { /* UTF */
- if (IS_TEXTF(text_node)) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- to_utf8_lower((U8*)s, tmpbuf1, &ulen1);
- to_utf8_upper((U8*)s, tmpbuf2, &ulen2);
-#ifdef EBCDIC
- ST.c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
- ST.c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
-#else
- ST.c1 = utf8n_to_uvuni(tmpbuf1, UTF8_MAXBYTES, 0,
- uniflags);
- ST.c2 = utf8n_to_uvuni(tmpbuf2, UTF8_MAXBYTES, 0,
- uniflags);
-#endif
- }
- else {
- ST.c2 = ST.c1 = utf8n_to_uvchr(s, UTF8_MAXBYTES, 0,
- uniflags);
- }
- }
- }
- }
- else
- ST.c1 = ST.c2 = CHRTEST_VOID;
- assume_ok_easy:
-
- ST.A = scan;
- ST.B = next;
- PL_reginput = locinput;
- if (minmod) {
- minmod = 0;
- if (ST.min && regrepeat(rex, ST.A, ST.min, depth) < ST.min)
- sayNO;
- ST.count = ST.min;
- locinput = PL_reginput;
- REGCP_SET(ST.cp);
- if (ST.c1 == CHRTEST_VOID)
- goto curly_try_B_min;
-
- ST.oldloc = locinput;
-
- /* set ST.maxpos to the furthest point along the
- * string that could possibly match */
- if (ST.max == REG_INFTY) {
- ST.maxpos = PL_regeol - 1;
- if (do_utf8)
- while (UTF8_IS_CONTINUATION(*(U8*)ST.maxpos))
- ST.maxpos--;
- }
- else if (do_utf8) {
- int m = ST.max - ST.min;
- for (ST.maxpos = locinput;
- m >0 && ST.maxpos + UTF8SKIP(ST.maxpos) <= PL_regeol; m--)
- ST.maxpos += UTF8SKIP(ST.maxpos);
- }
- else {
- ST.maxpos = locinput + ST.max - ST.min;
- if (ST.maxpos >= PL_regeol)
- ST.maxpos = PL_regeol - 1;
- }
- goto curly_try_B_min_known;
-
- }
- else {
- ST.count = regrepeat(rex, ST.A, ST.max, depth);
- locinput = PL_reginput;
- if (ST.count < ST.min)
- sayNO;
- if ((ST.count > ST.min)
- && (PL_regkind[OP(ST.B)] == EOL) && (OP(ST.B) != MEOL))
- {
- /* A{m,n} must come at the end of the string, there's
- * no point in backing off ... */
- ST.min = ST.count;
- /* ...except that $ and \Z can match before *and* after
- newline at the end. Consider "\n\n" =~ /\n+\Z\n/.
- We may back off by one in this case. */
- if (UCHARAT(PL_reginput - 1) == '\n' && OP(ST.B) != EOS)
- ST.min--;
- }
- REGCP_SET(ST.cp);
- goto curly_try_B_max;
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_known_fail:
- /* failed to find B in a non-greedy match where c1,c2 valid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- PL_reginput = locinput; /* Could be reset... */
- REGCP_UNWIND(ST.cp);
- /* Couldn't or didn't -- move forward. */
- ST.oldloc = locinput;
- if (do_utf8)
- locinput += UTF8SKIP(locinput);
- else
- locinput++;
- ST.count++;
- curly_try_B_min_known:
- /* find the next place where 'B' could work, then call B */
- {
- int n;
- if (do_utf8) {
- n = (ST.oldloc == locinput) ? 0 : 1;
- if (ST.c1 == ST.c2) {
- STRLEN len;
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos &&
- utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags) != (UV)ST.c1) {
- locinput += len;
- n++;
- }
- }
- else {
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos) {
- STRLEN len;
- const UV c = utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags);
- if (c == (UV)ST.c1 || c == (UV)ST.c2)
- break;
- locinput += len;
- n++;
- }
- }
- }
- else {
- if (ST.c1 == ST.c2) {
- while (locinput <= ST.maxpos &&
- UCHARAT(locinput) != ST.c1)
- locinput++;
- }
- else {
- while (locinput <= ST.maxpos
- && UCHARAT(locinput) != ST.c1
- && UCHARAT(locinput) != ST.c2)
- locinput++;
- }
- n = locinput - ST.oldloc;
- }
- if (locinput > ST.maxpos)
- sayNO;
- /* PL_reginput == oldloc now */
- if (n) {
- ST.count += n;
- if (regrepeat(rex, ST.A, n, depth) < n)
- sayNO;
- }
- PL_reginput = locinput;
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min_known, ST.B);
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_fail:
- /* failed to find B in a non-greedy match where c1,c2 invalid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* failed -- move forward one */
- PL_reginput = locinput;
- if (regrepeat(rex, ST.A, 1, depth)) {
- ST.count++;
- locinput = PL_reginput;
- if (ST.count <= ST.max || (ST.max == REG_INFTY &&
- ST.count > 0)) /* count overflow ? */
- {
- curly_try_B_min:
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min, ST.B);
- }
- }
- sayNO;
- /* NOTREACHED */
-
-
- curly_try_B_max:
- /* a successful greedy match: now try to match B */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- {
- UV c = 0;
- if (ST.c1 != CHRTEST_VOID)
- c = do_utf8 ? utf8n_to_uvchr((U8*)PL_reginput,
- UTF8_MAXBYTES, 0, uniflags)
- : (UV) UCHARAT(PL_reginput);
- /* If it could work, try it. */
- if (ST.c1 == CHRTEST_VOID || c == (UV)ST.c1 || c == (UV)ST.c2) {
- CURLY_SETPAREN(ST.paren, ST.count);
- PUSH_STATE_GOTO(CURLY_B_max, ST.B);
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case CURLY_B_max_fail:
- /* failed to find B in a greedy match */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* back up. */
- if (--ST.count < ST.min)
- sayNO;
- PL_reginput = locinput = HOPc(locinput, -1);
- goto curly_try_B_max;
-
-#undef ST
-
- case END:
- fake_end:
- if (cur_eval) {
- /* we've just finished A in /(??{A})B/; now continue with B */
- I32 tmpix;
- st->u.eval.toggle_reg_flags
- = cur_eval->u.eval.toggle_reg_flags;
- PL_reg_flags ^= st->u.eval.toggle_reg_flags;
-
- st->u.eval.prev_rex = rex_sv; /* inner */
- SETREX(rex_sv,cur_eval->u.eval.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- cur_curlyx = cur_eval->u.eval.prev_curlyx;
- ReREFCNT_inc(rex_sv);
- st->u.eval.cp = regcppush(0); /* Save *all* the positions. */
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- REGCP_SET(st->u.eval.lastcp);
- PL_reginput = locinput;
-
- /* Restore parens of the outer rex without popping the
- * savestack */
- tmpix = PL_savestack_ix;
- PL_savestack_ix = cur_eval->u.eval.lastcp;
- regcppop(rex);
- PL_savestack_ix = tmpix;
-
- st->u.eval.prev_eval = cur_eval;
- cur_eval = cur_eval->u.eval.prev_eval;
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log, "%*s EVAL trying tail ... %"UVxf"\n",
- REPORT_CODE_OFF+depth*2, "",PTR2UV(cur_eval)););
- if ( nochange_depth )
- nochange_depth--;
-
- PUSH_YES_STATE_GOTO(EVAL_AB,
- st->u.eval.prev_eval->u.eval.B); /* match B */
- }
-
- if (locinput < reginfo->till) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n",
- PL_colors[4],
- (long)(locinput - PL_reg_starttry),
- (long)(reginfo->till - PL_reg_starttry),
- PL_colors[5]));
-
- sayNO_SILENT; /* Cannot match: too short. */
- }
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
- case SUCCEED: /* successful SUSPEND/UNLESSM/IFMATCH/CURLYM */
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %ssubpattern success...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]));
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
-#undef ST
-#define ST st->u.ifmatch
-
- case SUSPEND: /* (?>A) */
- ST.wanted = 1;
- PL_reginput = locinput;
- goto do_ifmatch;
-
- case UNLESSM: /* -ve lookaround: (?!A), or with flags, (?<!A) */
- ST.wanted = 0;
- goto ifmatch_trivial_fail_test;
-
- case IFMATCH: /* +ve lookaround: (?=A), or with flags, (?<=A) */
- ST.wanted = 1;
- ifmatch_trivial_fail_test:
- if (scan->flags) {
- char * const s = HOPBACKc(locinput, scan->flags);
- if (!s) {
- /* trivial fail */
- if (logical) {
- logical = 0;
- sw = 1 - (bool)ST.wanted;
- }
- else if (ST.wanted)
- sayNO;
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- }
- PL_reginput = s;
- }
- else
- PL_reginput = locinput;
-
- do_ifmatch:
- ST.me = scan;
- ST.logical = logical;
- logical = 0; /* XXX: reset state of logical once it has been saved into ST */
-
- /* execute body of (?...A) */
- PUSH_YES_STATE_GOTO(IFMATCH_A, NEXTOPER(NEXTOPER(scan)));
- /* NOTREACHED */
-
- case IFMATCH_A_fail: /* body of (?...A) failed */
- ST.wanted = !ST.wanted;
- /* FALL THROUGH */
-
- case IFMATCH_A: /* body of (?...A) succeeded */
- if (ST.logical) {
- sw = (bool)ST.wanted;
- }
- else if (!ST.wanted)
- sayNO;
-
- if (OP(ST.me) == SUSPEND)
- locinput = PL_reginput;
- else {
- locinput = PL_reginput = st->locinput;
- nextchr = UCHARAT(locinput);
- }
- scan = ST.me + ARG(ST.me);
- if (scan == ST.me)
- scan = NULL;
- continue; /* execute B */
-
-#undef ST
-
- case LONGJMP:
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- case COMMIT:
- reginfo->cutpoint = PL_regeol;
- /* FALLTHROUGH */
- case PRUNE:
- PL_reginput = locinput;
- if (!scan->flags)
- sv_yes_mark = sv_commit = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(COMMIT_next,next);
- /* NOTREACHED */
- case COMMIT_next_fail:
- no_final = 1;
- /* FALLTHROUGH */
- case OPFAIL:
- sayNO;
- /* NOTREACHED */
-
-#define ST st->u.mark
- case MARKPOINT:
- ST.prev_mark = mark_state;
- ST.mark_name = sv_commit = sv_yes_mark
- = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- mark_state = st;
- ST.mark_loc = PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(MARKPOINT_next,next);
- /* NOTREACHED */
- case MARKPOINT_next:
- mark_state = ST.prev_mark;
- sayYES;
- /* NOTREACHED */
- case MARKPOINT_next_fail:
- if (popmark && sv_eq(ST.mark_name,popmark))
- {
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- popmark = NULL; /* we found our mark */
- sv_commit = ST.mark_name;
-
- DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,
- "%*s %ssetting cutpoint to mark:%"SVf"...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], SVfARG(sv_commit), PL_colors[5]);
- });
- }
- mark_state = ST.prev_mark;
- sv_yes_mark = mark_state ?
- mark_state->u.mark.mark_name : NULL;
- sayNO;
- /* NOTREACHED */
- case SKIP:
- PL_reginput = locinput;
- if (scan->flags) {
- /* (*SKIP) : if we fail we cut here*/
- ST.mark_name = NULL;
- ST.mark_loc = locinput;
- PUSH_STATE_GOTO(SKIP_next,next);
- } else {
- /* (*SKIP:NAME) : if there is a (*MARK:NAME) fail where it was,
- otherwise do nothing. Meaning we need to scan
- */
- regmatch_state *cur = mark_state;
- SV *find = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
-
- while (cur) {
- if ( sv_eq( cur->u.mark.mark_name,
- find ) )
- {
- ST.mark_name = find;
- PUSH_STATE_GOTO( SKIP_next, next );
- }
- cur = cur->u.mark.prev_mark;
- }
- }
- /* Didn't find our (*MARK:NAME) so ignore this (*SKIP:NAME) */
- break;
- case SKIP_next_fail:
- if (ST.mark_name) {
- /* (*CUT:NAME) - Set up to search for the name as we
- collapse the stack*/
- popmark = ST.mark_name;
- } else {
- /* (*CUT) - No name, we cut here.*/
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- /* but we set sv_commit to latest mark_name if there
- is one so they can test to see how things lead to this
- cut */
- if (mark_state)
- sv_commit=mark_state->u.mark.mark_name;
- }
- no_final = 1;
- sayNO;
- /* NOTREACHED */
-#undef ST
- case FOLDCHAR:
- n = ARG(scan);
- if ( n == (U32)what_len_TRICKYFOLD(locinput,do_utf8,ln) ) {
- locinput += ln;
- } else if ( 0xDF == n && !do_utf8 && !UTF ) {
- sayNO;
- } else {
- U8 folded[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const char * const l = locinput;
- char *e = PL_regeol;
- to_uni_fold(n, folded, &foldlen);
-
- if (ibcmp_utf8((const char*) folded, 0, foldlen, 1,
- l, &e, 0, do_utf8)) {
- sayNO;
- }
- locinput = e;
- }
- nextchr = UCHARAT(locinput);
- break;
- case LNBREAK:
- if ((n=is_LNBREAK(locinput,do_utf8))) {
- locinput += n;
- nextchr = UCHARAT(locinput);
- } else
- sayNO;
- break;
-
-#define CASE_CLASS(nAmE) \
- case nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- locinput += n; \
- nextchr = UCHARAT(locinput); \
- } else \
- sayNO; \
- break; \
- case N##nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- sayNO; \
- } else { \
- locinput += UTF8SKIP(locinput); \
- nextchr = UCHARAT(locinput); \
- } \
- break
-
- CASE_CLASS(VERTWS);
- CASE_CLASS(HORIZWS);
-#undef CASE_CLASS
-
- default:
- PerlIO_printf(Perl_error_log, "%"UVxf" %d\n",
- PTR2UV(scan), OP(scan));
- Perl_croak(aTHX_ "regexp memory corruption");
-
- } /* end switch */
-
- /* switch break jumps here */
- scan = next; /* prepare to execute the next op and ... */
- continue; /* ... jump back to the top, reusing st */
- /* NOTREACHED */
-
- push_yes_state:
- /* push a state that backtracks on success */
- st->u.yes.prev_yes_state = yes_state;
- yes_state = st;
- /* FALL THROUGH */
- push_state:
- /* push a new regex state, then continue at scan */
- {
- regmatch_state *newst;
-
- DEBUG_STACK_r({
- regmatch_state *cur = st;
- regmatch_state *curyes = yes_state;
- int curd = depth;
- regmatch_slab *slab = PL_regmatch_slab;
- for (;curd > -1;cur--,curd--) {
- if (cur < SLAB_FIRST(slab)) {
- slab = slab->prev;
- cur = SLAB_LAST(slab);
- }
- PerlIO_printf(Perl_error_log, "%*s#%-3d %-10s %s\n",
- REPORT_CODE_OFF + 2 + depth * 2,"",
- curd, PL_reg_name[cur->resume_state],
- (curyes == cur) ? "yes" : ""
- );
- if (curyes == cur)
- curyes = cur->u.yes.prev_yes_state;
- }
- } else
- DEBUG_STATE_pp("push")
- );
- depth++;
- st->locinput = locinput;
- newst = st+1;
- if (newst > SLAB_LAST(PL_regmatch_slab))
- newst = S_push_slab(aTHX);
- PL_regmatch_state = newst;
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- st = newst;
- continue;
- /* NOTREACHED */
- }
- }
-
- /*
- * We get here only if there's trouble -- normally "case END" is
- * the terminating point.
- */
- Perl_croak(aTHX_ "corrupted regexp pointers");
- /*NOTREACHED*/
- sayNO;
-
-yes:
- if (yes_state) {
- /* we have successfully completed a subexpression, but we must now
- * pop to the state marked by yes_state and continue from there */
- assert(st != yes_state);
-#ifdef DEBUGGING
- while (st != yes_state) {
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- DEBUG_STATE_r({
- if (no_final) {
- DEBUG_STATE_pp("pop (no final)");
- } else {
- DEBUG_STATE_pp("pop (yes)");
- }
- });
- depth--;
- }
-#else
- while (yes_state < SLAB_FIRST(PL_regmatch_slab)
- || yes_state > SLAB_LAST(PL_regmatch_slab))
- {
- /* not in this slab, pop slab */
- depth -= (st - SLAB_FIRST(PL_regmatch_slab) + 1);
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- depth -= (st - yes_state);
-#endif
- st = yes_state;
- yes_state = st->u.yes.prev_yes_state;
- PL_regmatch_state = st;
-
- if (no_final) {
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
- }
- state_num = st->resume_state + no_final;
- goto reenter_switch;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n",
- PL_colors[4], PL_colors[5]));
-
- if (PL_reg_eval_set) {
- /* each successfully executed (?{...}) block does the equivalent of
- * local $^R = do {...}
- * When popping the save stack, all these locals would be undone;
- * bypass this by setting the outermost saved $^R to the latest
- * value */
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- }
- result = 1;
- goto final_exit;
-
-no:
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], PL_colors[5])
- );
-
-no_silent:
- if (no_final) {
- if (yes_state) {
- goto yes;
- } else {
- goto final_exit;
- }
- }
- if (depth) {
- /* there's a previous state to backtrack to */
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- PL_regmatch_state = st;
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
-
- DEBUG_STATE_pp("pop");
- depth--;
- if (yes_state == st)
- yes_state = st->u.yes.prev_yes_state;
-
- state_num = st->resume_state + 1; /* failure = success + 1 */
- goto reenter_switch;
- }
- result = 0;
-
- final_exit:
- if (rex->intflags & PREGf_VERBARG_SEEN) {
- SV *sv_err = get_sv("REGERROR", 1);
- SV *sv_mrk = get_sv("REGMARK", 1);
- if (result) {
- sv_commit = &PL_sv_no;
- if (!sv_yes_mark)
- sv_yes_mark = &PL_sv_yes;
- } else {
- if (!sv_commit)
- sv_commit = &PL_sv_yes;
- sv_yes_mark = &PL_sv_no;
- }
- sv_setsv(sv_err, sv_commit);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- /* clean up; in particular, free all slabs above current one */
- LEAVE_SCOPE(oldsave);
-
- return result;
-}
-
-/*
- - regrepeat - repeatedly match something simple, report how many
- */
-/*
- * [This routine now assumes that it will only match on things of length 1.
- * That was true before, but now we assume scan - reginput is the count,
- * rather than incrementing count on every character. [Er, except utf8.]]
- */
-STATIC I32
-S_regrepeat(pTHX_ const regexp *prog, const regnode *p, I32 max, int depth)
-{
- dVAR;
- register char *scan;
- register I32 c;
- register char *loceol = PL_regeol;
- register I32 hardcount = 0;
- register bool do_utf8 = PL_reg_match_utf8;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_REGREPEAT;
-
- scan = PL_reginput;
- if (max == REG_INFTY)
- max = I32_MAX;
- else if (max < loceol - scan)
- loceol = scan + max;
- switch (OP(p)) {
- case REG_ANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max && *scan != '\n') {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && *scan != '\n')
- scan++;
- }
- break;
- case SANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- }
- else
- scan = loceol;
- break;
- case CANY:
- scan = loceol;
- break;
- case EXACT: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol && UCHARAT(scan) == c)
- scan++;
- break;
- case EXACTF: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c]))
- scan++;
- break;
- case EXACTFL: /* length of string is 1 */
- PL_reg_flags |= RF_tainted;
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c]))
- scan++;
- break;
- case ANYOF:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- reginclass(prog, p, (U8*)scan, 0, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && REGINCLASS(prog, p, (U8*)scan))
- scan++;
- }
- break;
- case ALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM(*scan))
- scan++;
- }
- break;
- case ALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM_LC(*scan))
- scan++;
- }
- break;
- case NALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM(*scan))
- scan++;
- }
- break;
- case NALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM_LC(*scan))
- scan++;
- }
- break;
- case SPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE(*scan))
- scan++;
- }
- break;
- case SPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE_LC(*scan))
- scan++;
- }
- break;
- case NSPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE(*scan))
- scan++;
- }
- break;
- case NSPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE_LC(*scan))
- scan++;
- }
- break;
- case DIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isDIGIT(*scan))
- scan++;
- }
- break;
- case NDIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isDIGIT(*scan))
- scan++;
- }
- case LNBREAK:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_LNBREAK_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- /*
- LNBREAK can match two latin chars, which is ok,
- because we have a null terminated string, but we
- have to use hardcount in this situation
- */
- while (scan < loceol && (c=is_LNBREAK_latin1(scan))) {
- scan+=c;
- hardcount++;
- }
- }
- break;
- case HORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_HORIZWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_HORIZWS_latin1(scan))
- scan++;
- }
- break;
- case NHORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_HORIZWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_HORIZWS_latin1(scan))
- scan++;
-
- }
- break;
- case VERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_VERTWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
- case NVERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_VERTWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
-
- default: /* Called on something of 0 width. */
- break; /* So match right here or not at all. */
- }
-
- if (hardcount)
- c = hardcount;
- else
- c = scan - PL_reginput;
- PL_reginput = scan;
-
- DEBUG_r({
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, p);
- PerlIO_printf(Perl_debug_log,
- "%*s %s can match %"IVdf" times out of %"IVdf"...\n",
- REPORT_CODE_OFF + depth*2, "", SvPVX_const(prop),(IV)c,(IV)max);
- });
- });
-
- return(c);
-}
-
-
-#if !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION)
-/*
-- regclass_swash - prepare the utf8 swash
-*/
-
-SV *
-Perl_regclass_swash(pTHX_ const regexp *prog, register const regnode* node, bool doinit, SV** listsvp, SV **altsvp)
-{
- dVAR;
- SV *sw = NULL;
- SV *si = NULL;
- SV *alt = NULL;
- RXi_GET_DECL(prog,progi);
- const struct reg_data * const data = prog ? progi->data : NULL;
-
- PERL_ARGS_ASSERT_REGCLASS_SWASH;
-
- if (data && data->count) {
- const U32 n = ARG(node);
-
- if (data->what[n] == 's') {
- SV * const rv = MUTABLE_SV(data->data[n]);
- AV * const av = MUTABLE_AV(SvRV(rv));
- SV **const ary = AvARRAY(av);
- SV **a, **b;
-
- /* See the end of regcomp.c:S_regclass() for
- * documentation of these array elements. */
-
- si = *ary;
- a = SvROK(ary[1]) ? &ary[1] : NULL;
- b = SvTYPE(ary[2]) == SVt_PVAV ? &ary[2] : NULL;
-
- if (a)
- sw = *a;
- else if (si && doinit) {
- sw = swash_init("utf8", "", si, 1, 0);
- (void)av_store(av, 1, sw);
- }
- if (b)
- alt = *b;
- }
- }
-
- if (listsvp)
- *listsvp = si;
- if (altsvp)
- *altsvp = alt;
-
- return sw;
-}
-#endif
-
-/*
- - reginclass - determine if a character falls into a character class
-
- The n is the ANYOF regnode, the p is the target string, lenp
- is pointer to the maximum length of how far to go in the p
- (if the lenp is zero, UTF8SKIP(p) is used),
- do_utf8 tells whether the target string is in UTF-8.
-
- */
-
-STATIC bool
-S_reginclass(pTHX_ const regexp *prog, register const regnode *n, register const U8* p, STRLEN* lenp, register bool do_utf8)
-{
- dVAR;
- const char flags = ANYOF_FLAGS(n);
- bool match = FALSE;
- UV c = *p;
- STRLEN len = 0;
- STRLEN plen;
-
- PERL_ARGS_ASSERT_REGINCLASS;
-
- if (do_utf8 && !UTF8_IS_INVARIANT(c)) {
- c = utf8n_to_uvchr(p, UTF8_MAXBYTES, &len,
- (UTF8_ALLOW_DEFAULT & UTF8_ALLOW_ANYUV) | UTF8_CHECK_ONLY);
- /* see [perl #37836] for UTF8_ALLOW_ANYUV */
- if (len == (STRLEN)-1)
- Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)");
- }
-
- plen = lenp ? *lenp : UNISKIP(NATIVE_TO_UNI(c));
- if (do_utf8 || (flags & ANYOF_UNICODE)) {
- if (lenp)
- *lenp = 0;
- if (do_utf8 && !ANYOF_RUNTIME(n)) {
- if (len != (STRLEN)-1 && c < 256 && ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- }
- if (!match && do_utf8 && (flags & ANYOF_UNICODE_ALL) && c >= 256)
- match = TRUE;
- if (!match) {
- AV *av;
- SV * const sw = regclass_swash(prog, n, TRUE, 0, (SV**)&av);
-
- if (sw) {
- U8 * utf8_p;
- if (do_utf8) {
- utf8_p = (U8 *) p;
- } else {
- STRLEN len = 1;
- utf8_p = bytes_to_utf8(p, &len);
- }
- if (swash_fetch(sw, utf8_p, 1))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- if (!match && lenp && av) {
- I32 i;
- for (i = 0; i <= av_len(av); i++) {
- SV* const sv = *av_fetch(av, i, FALSE);
- STRLEN len;
- const char * const s = SvPV_const(sv, len);
- if (len <= plen && memEQ(s, (char*)utf8_p, len)) {
- *lenp = len;
- match = TRUE;
- break;
- }
- }
- }
- if (!match) {
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1];
-
- STRLEN tmplen;
- to_utf8_fold(utf8_p, tmpbuf, &tmplen);
- if (swash_fetch(sw, tmpbuf, 1))
- match = TRUE;
- }
- }
-
- /* If we allocated a string above, free it */
- if (! do_utf8) Safefree(utf8_p);
- }
- }
- if (match && lenp && *lenp == 0)
- *lenp = UNISKIP(NATIVE_TO_UNI(c));
- }
- if (!match && c < 256) {
- if (ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- U8 f;
-
- if (flags & ANYOF_LOCALE) {
- PL_reg_flags |= RF_tainted;
- f = PL_fold_locale[c];
- }
- else
- f = PL_fold[c];
- if (f != c && ANYOF_BITMAP_TEST(n, f))
- match = TRUE;
- }
-
- if (!match && (flags & ANYOF_CLASS)) {
- PL_reg_flags |= RF_tainted;
- if (
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK(c))
- ) /* How's that for a conditional? */
- {
- match = TRUE;
- }
- }
- }
-
- return (flags & ANYOF_INVERT) ? !match : match;
-}
-
-STATIC U8 *
-S_reghop3(U8 *s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-
-#ifdef XXX_dmq
-/* there are a bunch of places where we use two reghop3's that should
- be replaced with this routine. but since thats not done yet
- we ifdef it out - dmq
-*/
-STATIC U8 *
-S_reghop4(U8 *s, I32 off, const U8* llim, const U8* rlim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP4;
-
- if (off >= 0) {
- while (off-- && s < rlim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > llim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > llim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-#endif
-
-STATIC U8 *
-S_reghopmaybe3(U8* s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOPMAYBE3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- if (off >= 0)
- return NULL;
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- if (off <= 0)
- return NULL;
- }
- return s;
-}
-
-static void
-restore_pos(pTHX_ void *arg)
-{
- dVAR;
- regexp * const rex = (regexp *)arg;
- if (PL_reg_eval_set) {
- if (PL_reg_oldsaved) {
- rex->subbeg = PL_reg_oldsaved;
- rex->sublen = PL_reg_oldsavedlen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- rex->saved_copy = PL_nrs;
-#endif
- RXp_MATCH_COPIED_on(rex);
- }
- PL_reg_magic->mg_len = PL_reg_oldpos;
- PL_reg_eval_set = 0;
- PL_curpm = PL_reg_oldcurpm;
- }
-}
-
-STATIC void
-S_to_utf8_substr(pTHX_ register regexp *prog)
-{
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_UTF8_SUBSTR;
-
- do {
- if (prog->substrs->data[i].substr
- && !prog->substrs->data[i].utf8_substr) {
- SV* const sv = newSVsv(prog->substrs->data[i].substr);
- prog->substrs->data[i].utf8_substr = sv;
- sv_utf8_upgrade(sv);
- if (SvVALID(prog->substrs->data[i].substr)) {
- const U8 flags = BmFLAGS(prog->substrs->data[i].substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- /* Whilst this makes the SV technically "invalid" (as its
- buffer is no longer followed by "\0") when fbm_compile()
- adds the "\n" back, a "\0" is restored. */
- }
- fbm_compile(sv, flags);
- }
- if (prog->substrs->data[i].substr == prog->check_substr)
- prog->check_utf8 = sv;
- }
- } while (i--);
-}
-
-STATIC void
-S_to_byte_substr(pTHX_ register regexp *prog)
-{
- dVAR;
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_BYTE_SUBSTR;
-
- do {
- if (prog->substrs->data[i].utf8_substr
- && !prog->substrs->data[i].substr) {
- SV* sv = newSVsv(prog->substrs->data[i].utf8_substr);
- if (sv_utf8_downgrade(sv, TRUE)) {
- if (SvVALID(prog->substrs->data[i].utf8_substr)) {
- const U8 flags
- = BmFLAGS(prog->substrs->data[i].utf8_substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- }
- fbm_compile(sv, flags);
- }
- } else {
- SvREFCNT_dec(sv);
- sv = &PL_sv_undef;
- }
- prog->substrs->data[i].substr = sv;
- if (prog->substrs->data[i].utf8_substr == prog->check_utf8)
- prog->check_substr = sv;
- }
- } while (i--);
-}
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regcomp.c
- */
-
-/*
- * 'A fair jaw-cracker dwarf-language must be.' --Samwise Gamgee
- *
- * [p.285 of _The Lord of the Rings_, II/iii: "The Ring Goes South"]
- */
-
-/* This file contains functions for compiling a regular expression. See
- * also regexec.c which funnily enough, contains functions for executing
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_comp.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
-
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGCOMP_C
-#include "perl.h"
-
-#ifndef PERL_IN_XSUB_RE
-# include "INTERN.h"
-#endif
-
-#define REG_COMP_C
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#ifdef op
-#undef op
-#endif /* op */
-
-#ifdef MSDOS
-# if defined(BUGGY_MSC6)
- /* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */
-# pragma optimize("a",off)
- /* But MSC 6.00A is happy with 'w', for aliases only across function calls*/
-# pragma optimize("w",on )
-# endif /* BUGGY_MSC6 */
-#endif /* MSDOS */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-typedef struct RExC_state_t {
- U32 flags; /* are we folding, multilining? */
- char *precomp; /* uncompiled string. */
- REGEXP *rx_sv; /* The SV that is the regexp. */
- regexp *rx; /* perl core regexp structure */
- regexp_internal *rxi; /* internal data for regexp object pprivate field */
- char *start; /* Start of input for compile */
- char *end; /* End of input for compile */
- char *parse; /* Input-scan pointer. */
- I32 whilem_seen; /* number of WHILEM in this expr */
- regnode *emit_start; /* Start of emitted-code area */
- regnode *emit_bound; /* First regnode outside of the allocated space */
- regnode *emit; /* Code-emit pointer; ®dummy = don't = compiling */
- I32 naughty; /* How bad is this pattern? */
- I32 sawback; /* Did we see \1, ...? */
- U32 seen;
- I32 size; /* Code size. */
- I32 npar; /* Capture buffer count, (OPEN). */
- I32 cpar; /* Capture buffer count, (CLOSE). */
- I32 nestroot; /* root parens we are in - used by accept */
- I32 extralen;
- I32 seen_zerolen;
- I32 seen_evals;
- regnode **open_parens; /* pointers to open parens */
- regnode **close_parens; /* pointers to close parens */
- regnode *opend; /* END node in program */
- I32 utf8; /* whether the pattern is utf8 or not */
- I32 orig_utf8; /* whether the pattern was originally in utf8 */
- /* XXX use this for future optimisation of case
- * where pattern must be upgraded to utf8. */
- HV *charnames; /* cache of named sequences */
- HV *paren_names; /* Paren names */
-
- regnode **recurse; /* Recurse regops */
- I32 recurse_count; /* Number of recurse regops */
-#if ADD_TO_REGEXEC
- char *starttry; /* -Dr: where regtry was called. */
-#define RExC_starttry (pRExC_state->starttry)
-#endif
-#ifdef DEBUGGING
- const char *lastparse;
- I32 lastnum;
- AV *paren_name_list; /* idx -> name */
-#define RExC_lastparse (pRExC_state->lastparse)
-#define RExC_lastnum (pRExC_state->lastnum)
-#define RExC_paren_name_list (pRExC_state->paren_name_list)
-#endif
-} RExC_state_t;
-
-#define RExC_flags (pRExC_state->flags)
-#define RExC_precomp (pRExC_state->precomp)
-#define RExC_rx_sv (pRExC_state->rx_sv)
-#define RExC_rx (pRExC_state->rx)
-#define RExC_rxi (pRExC_state->rxi)
-#define RExC_start (pRExC_state->start)
-#define RExC_end (pRExC_state->end)
-#define RExC_parse (pRExC_state->parse)
-#define RExC_whilem_seen (pRExC_state->whilem_seen)
-#ifdef RE_TRACK_PATTERN_OFFSETS
-#define RExC_offsets (pRExC_state->rxi->u.offsets) /* I am not like the others */
-#endif
-#define RExC_emit (pRExC_state->emit)
-#define RExC_emit_start (pRExC_state->emit_start)
-#define RExC_emit_bound (pRExC_state->emit_bound)
-#define RExC_naughty (pRExC_state->naughty)
-#define RExC_sawback (pRExC_state->sawback)
-#define RExC_seen (pRExC_state->seen)
-#define RExC_size (pRExC_state->size)
-#define RExC_npar (pRExC_state->npar)
-#define RExC_nestroot (pRExC_state->nestroot)
-#define RExC_extralen (pRExC_state->extralen)
-#define RExC_seen_zerolen (pRExC_state->seen_zerolen)
-#define RExC_seen_evals (pRExC_state->seen_evals)
-#define RExC_utf8 (pRExC_state->utf8)
-#define RExC_orig_utf8 (pRExC_state->orig_utf8)
-#define RExC_charnames (pRExC_state->charnames)
-#define RExC_open_parens (pRExC_state->open_parens)
-#define RExC_close_parens (pRExC_state->close_parens)
-#define RExC_opend (pRExC_state->opend)
-#define RExC_paren_names (pRExC_state->paren_names)
-#define RExC_recurse (pRExC_state->recurse)
-#define RExC_recurse_count (pRExC_state->recurse_count)
-
-
-#define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?')
-#define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \
- ((*s) == '{' && regcurly(s)))
-
-#ifdef SPSTART
-#undef SPSTART /* dratted cpp namespace... */
-#endif
-/*
- * Flags to be passed up and down.
- */
-#define WORST 0 /* Worst case. */
-#define HASWIDTH 0x01 /* Known to match non-null strings. */
-#define SIMPLE 0x02 /* Simple enough to be STAR/PLUS operand. */
-#define SPSTART 0x04 /* Starts with * or +. */
-#define TRYAGAIN 0x08 /* Weeded out a declaration. */
-#define POSTPONED 0x10 /* (?1),(?&name), (??{...}) or similar */
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-RExC_emit_start) : -1)
-
-/* whether trie related optimizations are enabled */
-#if PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION
-#define TRIE_STUDY_OPT
-#define FULL_TRIE_STUDY
-#define TRIE_STCLASS
-#endif
-
-
-
-#define PBYTE(u8str,paren) ((U8*)(u8str))[(paren) >> 3]
-#define PBITVAL(paren) (1 << ((paren) & 7))
-#define PAREN_TEST(u8str,paren) ( PBYTE(u8str,paren) & PBITVAL(paren))
-#define PAREN_SET(u8str,paren) PBYTE(u8str,paren) |= PBITVAL(paren)
-#define PAREN_UNSET(u8str,paren) PBYTE(u8str,paren) &= (~PBITVAL(paren))
-
-
-/* About scan_data_t.
-
- During optimisation we recurse through the regexp program performing
- various inplace (keyhole style) optimisations. In addition study_chunk
- and scan_commit populate this data structure with information about
- what strings MUST appear in the pattern. We look for the longest
- string that must appear for at a fixed location, and we look for the
- longest string that may appear at a floating location. So for instance
- in the pattern:
-
- /FOO[xX]A.*B[xX]BAR/
-
- Both 'FOO' and 'A' are fixed strings. Both 'B' and 'BAR' are floating
- strings (because they follow a .* construct). study_chunk will identify
- both FOO and BAR as being the longest fixed and floating strings respectively.
-
- The strings can be composites, for instance
-
- /(f)(o)(o)/
-
- will result in a composite fixed substring 'foo'.
-
- For each string some basic information is maintained:
-
- - offset or min_offset
- This is the position the string must appear at, or not before.
- It also implicitly (when combined with minlenp) tells us how many
- character must match before the string we are searching.
- Likewise when combined with minlenp and the length of the string
- tells us how many characters must appear after the string we have
- found.
-
- - max_offset
- Only used for floating strings. This is the rightmost point that
- the string can appear at. Ifset to I32 max it indicates that the
- string can occur infinitely far to the right.
-
- - minlenp
- A pointer to the minimum length of the pattern that the string
- was found inside. This is important as in the case of positive
- lookahead or positive lookbehind we can have multiple patterns
- involved. Consider
-
- /(?=FOO).*F/
-
- The minimum length of the pattern overall is 3, the minimum length
- of the lookahead part is 3, but the minimum length of the part that
- will actually match is 1. So 'FOO's minimum length is 3, but the
- minimum length for the F is 1. This is important as the minimum length
- is used to determine offsets in front of and behind the string being
- looked for. Since strings can be composites this is the length of the
- pattern at the time it was commited with a scan_commit. Note that
- the length is calculated by study_chunk, so that the minimum lengths
- are not known until the full pattern has been compiled, thus the
- pointer to the value.
-
- - lookbehind
-
- In the case of lookbehind the string being searched for can be
- offset past the start point of the final matching string.
- If this value was just blithely removed from the min_offset it would
- invalidate some of the calculations for how many chars must match
- before or after (as they are derived from min_offset and minlen and
- the length of the string being searched for).
- When the final pattern is compiled and the data is moved from the
- scan_data_t structure into the regexp structure the information
- about lookbehind is factored in, with the information that would
- have been lost precalculated in the end_shift field for the
- associated string.
-
- The fields pos_min and pos_delta are used to store the minimum offset
- and the delta to the maximum offset at the current point in the pattern.
-
-*/
-
-typedef struct scan_data_t {
- /*I32 len_min; unused */
- /*I32 len_delta; unused */
- I32 pos_min;
- I32 pos_delta;
- SV *last_found;
- I32 last_end; /* min value, <0 unless valid. */
- I32 last_start_min;
- I32 last_start_max;
- SV **longest; /* Either &l_fixed, or &l_float. */
- SV *longest_fixed; /* longest fixed string found in pattern */
- I32 offset_fixed; /* offset where it starts */
- I32 *minlen_fixed; /* pointer to the minlen relevent to the string */
- I32 lookbehind_fixed; /* is the position of the string modfied by LB */
- SV *longest_float; /* longest floating string found in pattern */
- I32 offset_float_min; /* earliest point in string it can appear */
- I32 offset_float_max; /* latest point in string it can appear */
- I32 *minlen_float; /* pointer to the minlen relevent to the string */
- I32 lookbehind_float; /* is the position of the string modified by LB */
- I32 flags;
- I32 whilem_c;
- I32 *last_closep;
- struct regnode_charclass_class *start_class;
-} scan_data_t;
-
-/*
- * Forward declarations for pregcomp()'s friends.
- */
-
-static const scan_data_t zero_scan_data =
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0};
-
-#define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL)
-#define SF_BEFORE_SEOL 0x0001
-#define SF_BEFORE_MEOL 0x0002
-#define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL)
-#define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL)
-
-#ifdef NO_UNARY_PLUS
-# define SF_FIX_SHIFT_EOL (0+2)
-# define SF_FL_SHIFT_EOL (0+4)
-#else
-# define SF_FIX_SHIFT_EOL (+2)
-# define SF_FL_SHIFT_EOL (+4)
-#endif
-
-#define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL)
-#define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL)
-
-#define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL)
-#define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */
-#define SF_IS_INF 0x0040
-#define SF_HAS_PAR 0x0080
-#define SF_IN_PAR 0x0100
-#define SF_HAS_EVAL 0x0200
-#define SCF_DO_SUBSTR 0x0400
-#define SCF_DO_STCLASS_AND 0x0800
-#define SCF_DO_STCLASS_OR 0x1000
-#define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR)
-#define SCF_WHILEM_VISITED_POS 0x2000
-
-#define SCF_TRIE_RESTUDY 0x4000 /* Do restudy? */
-#define SCF_SEEN_ACCEPT 0x8000
-
-#define UTF (RExC_utf8 != 0)
-#define LOC ((RExC_flags & RXf_PMf_LOCALE) != 0)
-#define FOLD ((RExC_flags & RXf_PMf_FOLD) != 0)
-
-#define OOB_UNICODE 12345678
-#define OOB_NAMEDCLASS -1
-
-#define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b)
-
-
-/* length of regex to show in messages that don't mark a position within */
-#define RegexLengthToShowInErrorMessages 127
-
-/*
- * If MARKER[12] are adjusted, be sure to adjust the constants at the top
- * of t/op/regmesg.t, the tests in t/op/re_tests, and those in
- * op/pragma/warn/regcomp.
- */
-#define MARKER1 "<-- HERE" /* marker as it appears in the description */
-#define MARKER2 " <-- HERE " /* marker as it appears within the regex */
-
-#define REPORT_LOCATION " in regex; marked by " MARKER1 " in m/%.*s" MARKER2 "%s/"
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given
- * arg. Show regex, up to a maximum length. If it's too long, chop and add
- * "...".
- */
-#define _FAIL(code) STMT_START { \
- const char *ellipses = ""; \
- IV len = RExC_end - RExC_precomp; \
- \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- if (len > RegexLengthToShowInErrorMessages) { \
- /* chop 10 shorter than the max, to ensure meaning of "..." */ \
- len = RegexLengthToShowInErrorMessages - 10; \
- ellipses = "..."; \
- } \
- code; \
-} STMT_END
-
-#define FAIL(msg) _FAIL( \
- Perl_croak(aTHX_ "%s in regex m/%.*s%s/", \
- msg, (int)len, RExC_precomp, ellipses))
-
-#define FAIL2(msg,arg) _FAIL( \
- Perl_croak(aTHX_ msg " in regex m/%.*s%s/", \
- arg, (int)len, RExC_precomp, ellipses))
-
-/*
- * Simple_vFAIL -- like FAIL, but marks the current location in the scan
- */
-#define Simple_vFAIL(m) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- Perl_croak(aTHX_ "%s" REPORT_LOCATION, \
- m, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL()
- */
-#define vFAIL(m) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL(m); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts two arguments.
- */
-#define Simple_vFAIL2(m,a1) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2().
- */
-#define vFAIL2(m,a1) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL2(m, a1); \
-} STMT_END
-
-
-/*
- * Like Simple_vFAIL(), but accepts three arguments.
- */
-#define Simple_vFAIL3(m, a1, a2) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3().
- */
-#define vFAIL3(m,a1,a2) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL3(m, a1, a2); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts four arguments.
- */
-#define Simple_vFAIL4(m, a1, a2, a3) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNreg(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNregdep(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_REGEXP), \
- m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN2reg(loc, m, a1) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN3(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN3reg(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN4(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN4reg(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN5(loc, m, a1, a2, a3, a4) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, a4, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-
-/* Allow for side effects in s */
-#define REGC(c,s) STMT_START { \
- if (!SIZE_ONLY) *(s) = (c); else (void)(s); \
-} STMT_END
-
-/* Macros for recording node offsets. 20001227 mjd@plover.com
- * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in
- * element 2*n-1 of the array. Element #2n holds the byte length node #n.
- * Element 0 holds the number n.
- * Position is 1 indexed.
- */
-#ifndef RE_TRACK_PATTERN_OFFSETS
-#define Set_Node_Offset_To_R(node,byte)
-#define Set_Node_Offset(node,byte)
-#define Set_Cur_Node_Offset
-#define Set_Node_Length_To_R(node,len)
-#define Set_Node_Length(node,len)
-#define Set_Node_Cur_Length(node)
-#define Node_Offset(n)
-#define Node_Length(n)
-#define Set_Node_Offset_Length(node,offset,len)
-#define ProgLen(ri) ri->u.proglen
-#define SetProgLen(ri,x) ri->u.proglen = x
-#else
-#define ProgLen(ri) ri->u.offsets[0]
-#define SetProgLen(ri,x) ri->u.offsets[0] = x
-#define Set_Node_Offset_To_R(node,byte) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) offset of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(byte))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Offset macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)-1] = (byte); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Offset(node,byte) \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start)
-#define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse)
-
-#define Set_Node_Length_To_R(node,len) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) size of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(len))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Length macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)] = (len); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Length(node,len) \
- Set_Node_Length_To_R((node)-RExC_emit_start, len)
-#define Set_Cur_Node_Length(len) Set_Node_Length(RExC_emit, len)
-#define Set_Node_Cur_Length(node) \
- Set_Node_Length(node, RExC_parse - parse_start)
-
-/* Get offsets and lengths */
-#define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1])
-#define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)])
-
-#define Set_Node_Offset_Length(node,offset,len) STMT_START { \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (offset)); \
- Set_Node_Length_To_R((node)-RExC_emit_start, (len)); \
-} STMT_END
-#endif
-
-#if PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS
-#define EXPERIMENTAL_INPLACESCAN
-#endif /*RE_TRACK_PATTERN_OFFSETS*/
-
-#define DEBUG_STUDYDATA(str,data,depth) \
-DEBUG_OPTIMISE_MORE_r(if(data){ \
- PerlIO_printf(Perl_debug_log, \
- "%*s" str "Pos:%"IVdf"/%"IVdf \
- " Flags: 0x%"UVXf" Whilem_c: %"IVdf" Lcp: %"IVdf" %s", \
- (int)(depth)*2, "", \
- (IV)((data)->pos_min), \
- (IV)((data)->pos_delta), \
- (UV)((data)->flags), \
- (IV)((data)->whilem_c), \
- (IV)((data)->last_closep ? *((data)->last_closep) : -1), \
- is_inf ? "INF " : "" \
- ); \
- if ((data)->last_found) \
- PerlIO_printf(Perl_debug_log, \
- "Last:'%s' %"IVdf":%"IVdf"/%"IVdf" %sFixed:'%s' @ %"IVdf \
- " %sFloat: '%s' @ %"IVdf"/%"IVdf"", \
- SvPVX_const((data)->last_found), \
- (IV)((data)->last_end), \
- (IV)((data)->last_start_min), \
- (IV)((data)->last_start_max), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_fixed)) ? "*" : "", \
- SvPVX_const((data)->longest_fixed), \
- (IV)((data)->offset_fixed), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_float)) ? "*" : "", \
- SvPVX_const((data)->longest_float), \
- (IV)((data)->offset_float_min), \
- (IV)((data)->offset_float_max) \
- ); \
- PerlIO_printf(Perl_debug_log,"\n"); \
-});
-
-static void clear_re(pTHX_ void *r);
-
-/* Mark that we cannot extend a found fixed substring at this point.
- Update the longest found anchored substring and the longest found
- floating substrings if needed. */
-
-STATIC void
-S_scan_commit(pTHX_ const RExC_state_t *pRExC_state, scan_data_t *data, I32 *minlenp, int is_inf)
-{
- const STRLEN l = CHR_SVLEN(data->last_found);
- const STRLEN old_l = CHR_SVLEN(*data->longest);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_SCAN_COMMIT;
-
- if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) {
- SvSetMagicSV(*data->longest, data->last_found);
- if (*data->longest == data->longest_fixed) {
- data->offset_fixed = l ? data->last_start_min : data->pos_min;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL);
- else
- data->flags &= ~SF_FIX_BEFORE_EOL;
- data->minlen_fixed=minlenp;
- data->lookbehind_fixed=0;
- }
- else { /* *data->longest == data->longest_float */
- data->offset_float_min = l ? data->last_start_min : data->pos_min;
- data->offset_float_max = (l
- ? data->last_start_max
- : data->pos_min + data->pos_delta);
- if (is_inf || (U32)data->offset_float_max > (U32)I32_MAX)
- data->offset_float_max = I32_MAX;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL);
- else
- data->flags &= ~SF_FL_BEFORE_EOL;
- data->minlen_float=minlenp;
- data->lookbehind_float=0;
- }
- }
- SvCUR_set(data->last_found, 0);
- {
- SV * const sv = data->last_found;
- if (SvUTF8(sv) && SvMAGICAL(sv)) {
- MAGIC * const mg = mg_find(sv, PERL_MAGIC_utf8);
- if (mg)
- mg->mg_len = 0;
- }
- }
- data->last_end = -1;
- data->flags &= ~SF_BEFORE_EOL;
- DEBUG_STUDYDATA("commit: ",data,0);
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_anything(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_ANYTHING;
-
- ANYOF_CLASS_ZERO(cl);
- ANYOF_BITMAP_SETALL(cl);
- cl->flags = ANYOF_EOS|ANYOF_UNICODE_ALL;
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* Can match anything (initialization) */
-STATIC int
-S_cl_is_anything(const struct regnode_charclass_class *cl)
-{
- int value;
-
- PERL_ARGS_ASSERT_CL_IS_ANYTHING;
-
- for (value = 0; value <= ANYOF_MAX; value += 2)
- if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1))
- return 1;
- if (!(cl->flags & ANYOF_UNICODE_ALL))
- return 0;
- if (!ANYOF_BITMAP_TESTALLSET((const void*)cl))
- return 0;
- return 1;
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_init(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
-}
-
-STATIC void
-S_cl_init_zero(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT_ZERO;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* 'And' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_and(struct regnode_charclass_class *cl,
- const struct regnode_charclass_class *and_with)
-{
- PERL_ARGS_ASSERT_CL_AND;
-
- assert(and_with->type == ANYOF);
- if (!(and_with->flags & ANYOF_CLASS)
- && !(cl->flags & ANYOF_CLASS)
- && (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(and_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD)) {
- int i;
-
- if (and_with->flags & ANYOF_INVERT)
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= ~and_with->bitmap[i];
- else
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= and_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise, leave it along for a moment. */
- if (!(and_with->flags & ANYOF_EOS))
- cl->flags &= ~ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE_ALL && and_with->flags & ANYOF_UNICODE &&
- !(and_with->flags & ANYOF_INVERT)) {
- cl->flags &= ~ANYOF_UNICODE_ALL;
- cl->flags |= ANYOF_UNICODE;
- ARG_SET(cl, ARG(and_with));
- }
- if (!(and_with->flags & ANYOF_UNICODE_ALL) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE_ALL;
- if (!(and_with->flags & (ANYOF_UNICODE|ANYOF_UNICODE_ALL)) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE;
-}
-
-/* 'OR' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_or(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl, const struct regnode_charclass_class *or_with)
-{
- PERL_ARGS_ASSERT_CL_OR;
-
- if (or_with->flags & ANYOF_INVERT) {
- /* We do not use
- * (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2))
- * <= (B1 | !B2) | (CL1 | !CL2)
- * which is wasteful if CL2 is small, but we ignore CL2:
- * (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1
- * XXXX Can we handle case-fold? Unclear:
- * (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) =
- * (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i'))
- */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(or_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD) ) {
- int i;
-
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= ~or_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise */
- else {
- cl_anything(pRExC_state, cl);
- }
- } else {
- /* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && (!(or_with->flags & ANYOF_FOLD)
- || (cl->flags & ANYOF_FOLD)) ) {
- int i;
-
- /* OR char bitmap and class bitmap separately */
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= or_with->bitmap[i];
- if (or_with->flags & ANYOF_CLASS) {
- for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++)
- cl->classflags[i] |= or_with->classflags[i];
- cl->flags |= ANYOF_CLASS;
- }
- }
- else { /* XXXX: logic is complicated, leave it along for a moment. */
- cl_anything(pRExC_state, cl);
- }
- }
- if (or_with->flags & ANYOF_EOS)
- cl->flags |= ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE && or_with->flags & ANYOF_UNICODE &&
- ARG(cl) != ARG(or_with)) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
- if (or_with->flags & ANYOF_UNICODE_ALL) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
-}
-
-#define TRIE_LIST_ITEM(state,idx) (trie->states[state].trans.list)[ idx ]
-#define TRIE_LIST_CUR(state) ( TRIE_LIST_ITEM( state, 0 ).forid )
-#define TRIE_LIST_LEN(state) ( TRIE_LIST_ITEM( state, 0 ).newstate )
-#define TRIE_LIST_USED(idx) ( trie->states[state].trans.list ? (TRIE_LIST_CUR( idx ) - 1) : 0 )
-
-
-#ifdef DEBUGGING
-/*
- dump_trie(trie,widecharmap,revcharmap)
- dump_trie_interim_list(trie,widecharmap,revcharmap,next_alloc)
- dump_trie_interim_table(trie,widecharmap,revcharmap,next_alloc)
-
- These routines dump out a trie in a somewhat readable format.
- The _interim_ variants are used for debugging the interim
- tables that are used to generate the final compressed
- representation which is what dump_trie expects.
-
- Part of the reason for their existance is to provide a form
- of documentation as to how the different representations function.
-
-*/
-
-/*
- Dumps the final compressed table form of the trie to Perl_debug_log.
- Used for debugging make_trie().
-*/
-
-STATIC void
-S_dump_trie(pTHX_ const struct _reg_trie_data *trie, HV *widecharmap,
- AV *revcharmap, U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE;
-
- PerlIO_printf( Perl_debug_log, "%*sChar : %-6s%-6s%-4s ",
- (int)depth * 2 + 2,"",
- "Match","Base","Ofs" );
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ ) {
- SV ** const tmp = av_fetch( revcharmap, state, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
- PerlIO_printf( Perl_debug_log, "\n%*sState|-----------------------",
- (int)depth * 2 + 2,"");
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ )
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth, "--------");
- PerlIO_printf( Perl_debug_log, "\n");
-
- for( state = 1 ; state < trie->statecount ; state++ ) {
- const U32 base = trie->states[ state ].trans.base;
-
- PerlIO_printf( Perl_debug_log, "%*s#%4"UVXf"|", (int)depth * 2 + 2,"", (UV)state);
-
- if ( trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " W%4X", trie->states[ state ].wordnum );
- } else {
- PerlIO_printf( Perl_debug_log, "%6s", "" );
- }
-
- PerlIO_printf( Perl_debug_log, " @%4"UVXf" ", (UV)base );
-
- if ( base ) {
- U32 ofs = 0;
-
- while( ( base + ofs < trie->uniquecharcount ) ||
- ( base + ofs - trie->uniquecharcount < trie->lasttrans
- && trie->trans[ base + ofs - trie->uniquecharcount ].check != state))
- ofs++;
-
- PerlIO_printf( Perl_debug_log, "+%2"UVXf"[ ", (UV)ofs);
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- PerlIO_printf( Perl_debug_log, "%*"UVXf,
- colwidth,
- (UV)trie->trans[ base + ofs - trie->uniquecharcount ].next );
- } else {
- PerlIO_printf( Perl_debug_log, "%*s",colwidth," ." );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "]");
-
- }
- PerlIO_printf( Perl_debug_log, "\n" );
- }
-}
-/*
- Dumps a fully constructed but uncompressed trie in list form.
- List tries normally only are used for construction when the number of
- possible chars (trie->uniquecharcount) is very high.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_list(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_LIST;
-
- /* print out the table precompression. */
- PerlIO_printf( Perl_debug_log, "%*sState :Word | Transition Data\n%*s%s",
- (int)depth * 2 + 2,"", (int)depth * 2 + 2,"",
- "------:-----+-----------------\n" );
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U16 charid;
-
- PerlIO_printf( Perl_debug_log, "%*s %4"UVXf" :",
- (int)depth * 2 + 2,"", (UV)state );
- if ( ! trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, "%5s| ","");
- } else {
- PerlIO_printf( Perl_debug_log, "W%4x| ",
- trie->states[ state ].wordnum
- );
- }
- for( charid = 1 ; charid <= TRIE_LIST_USED( state ) ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, TRIE_LIST_ITEM(state,charid).forid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s:%3X=%4"UVXf" | ",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- ) ,
- TRIE_LIST_ITEM(state,charid).forid,
- (UV)TRIE_LIST_ITEM(state,charid).newstate
- );
- if (!(charid % 10))
- PerlIO_printf(Perl_debug_log, "\n%*s| ",
- (int)((depth * 2) + 14), "");
- }
- }
- PerlIO_printf( Perl_debug_log, "\n");
- }
-}
-
-/*
- Dumps a fully constructed but uncompressed trie in table form.
- This is the normal DFA style state transition table, with a few
- twists to facilitate compression later.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_table(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- U16 charid;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_TABLE;
-
- /*
- print out the table precompression so that we can do a visual check
- that they are identical.
- */
-
- PerlIO_printf( Perl_debug_log, "%*sChar : ",(int)depth * 2 + 2,"" );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, charid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "\n%*sState+-",(int)depth * 2 + 2,"" );
-
- for( charid=0 ; charid < trie->uniquecharcount ; charid++ ) {
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth,"--------");
- }
-
- PerlIO_printf( Perl_debug_log, "\n" );
-
- for( state=1 ; state < next_alloc ; state += trie->uniquecharcount ) {
-
- PerlIO_printf( Perl_debug_log, "%*s%4"UVXf" : ",
- (int)depth * 2 + 2,"",
- (UV)TRIE_NODENUM( state ) );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- UV v=(UV)SAFE_TRIE_NODENUM( trie->trans[ state + charid ].next );
- if (v)
- PerlIO_printf( Perl_debug_log, "%*"UVXf, colwidth, v );
- else
- PerlIO_printf( Perl_debug_log, "%*s", colwidth, "." );
- }
- if ( ! trie->states[ TRIE_NODENUM( state ) ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf")\n", (UV)trie->trans[ state ].check );
- } else {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf") W%4X\n", (UV)trie->trans[ state ].check,
- trie->states[ TRIE_NODENUM( state ) ].wordnum );
- }
- }
-}
-
-#endif
-
-/* make_trie(startbranch,first,last,tail,word_count,flags,depth)
- startbranch: the first branch in the whole branch sequence
- first : start branch of sequence of branch-exact nodes.
- May be the same as startbranch
- last : Thing following the last branch.
- May be the same as tail.
- tail : item following the branch sequence
- count : words in the sequence
- flags : currently the OP() type we will be building one of /EXACT(|F|Fl)/
- depth : indent depth
-
-Inplace optimizes a sequence of 2 or more Branch-Exact nodes into a TRIE node.
-
-A trie is an N'ary tree where the branches are determined by digital
-decomposition of the key. IE, at the root node you look up the 1st character and
-follow that branch repeat until you find the end of the branches. Nodes can be
-marked as "accepting" meaning they represent a complete word. Eg:
-
- /he|she|his|hers/
-
-would convert into the following structure. Numbers represent states, letters
-following numbers represent valid transitions on the letter from that state, if
-the number is in square brackets it represents an accepting state, otherwise it
-will be in parenthesis.
-
- +-h->+-e->[3]-+-r->(8)-+-s->[9]
- | |
- | (2)
- | |
- (1) +-i->(6)-+-s->[7]
- |
- +-s->(3)-+-h->(4)-+-e->[5]
-
- Accept Word Mapping: 3=>1 (he),5=>2 (she), 7=>3 (his), 9=>4 (hers)
-
-This shows that when matching against the string 'hers' we will begin at state 1
-read 'h' and move to state 2, read 'e' and move to state 3 which is accepting,
-then read 'r' and go to state 8 followed by 's' which takes us to state 9 which
-is also accepting. Thus we know that we can match both 'he' and 'hers' with a
-single traverse. We store a mapping from accepting to state to which word was
-matched, and then when we have multiple possibilities we try to complete the
-rest of the regex in the order in which they occured in the alternation.
-
-The only prior NFA like behaviour that would be changed by the TRIE support is
-the silent ignoring of duplicate alternations which are of the form:
-
- / (DUPE|DUPE) X? (?{ ... }) Y /x
-
-Thus EVAL blocks follwing a trie may be called a different number of times with
-and without the optimisation. With the optimisations dupes will be silently
-ignored. This inconsistant behaviour of EVAL type nodes is well established as
-the following demonstrates:
-
- 'words'=~/(word|word|word)(?{ print $1 })[xyz]/
-
-which prints out 'word' three times, but
-
- 'words'=~/(word|word|word)(?{ print $1 })S/
-
-which doesnt print it out at all. This is due to other optimisations kicking in.
-
-Example of what happens on a structural level:
-
-The regexp /(ac|ad|ab)+/ will produce the folowing debug output:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: BRANCH(8)
- 6: EXACT <ac>(16)
- 8: BRANCH(11)
- 9: EXACT <ad>(16)
- 11: BRANCH(14)
- 12: EXACT <ab>(16)
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-This would be optimizable with startbranch=5, first=5, last=16, tail=16
-and should turn into:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: TRIE(16)
- [Words:3 Chars Stored:6 Unique Chars:4 States:5 NCP:1]
- <ac>
- <ad>
- <ab>
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-Cases where tail != last would be like /(?foo|bar)baz/:
-
- 1: BRANCH(4)
- 2: EXACT <foo>(8)
- 4: BRANCH(7)
- 5: EXACT <bar>(8)
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
-which would be optimizable with startbranch=1, first=1, last=7, tail=8
-and would end up looking like:
-
- 1: TRIE(8)
- [Words:2 Chars Stored:6 Unique Chars:5 States:7 NCP:1]
- <foo>
- <bar>
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
- d = uvuni_to_utf8_flags(d, uv, 0);
-
-is the recommended Unicode-aware way of saying
-
- *(d++) = uv;
-*/
-
-#define TRIE_STORE_REVCHAR \
- STMT_START { \
- if (UTF) { \
- SV *zlopp = newSV(2); \
- unsigned char *flrbbbbb = (unsigned char *) SvPVX(zlopp); \
- unsigned const char *const kapow = uvuni_to_utf8(flrbbbbb, uvc & 0xFF); \
- SvCUR_set(zlopp, kapow - flrbbbbb); \
- SvPOK_on(zlopp); \
- SvUTF8_on(zlopp); \
- av_push(revcharmap, zlopp); \
- } else { \
- char ooooff = (char)uvc; \
- av_push(revcharmap, newSVpvn(&ooooff, 1)); \
- } \
- } STMT_END
-
-#define TRIE_READ_CHAR STMT_START { \
- wordlen++; \
- if ( UTF ) { \
- if ( folder ) { \
- if ( foldlen > 0 ) { \
- uvc = utf8n_to_uvuni( scan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- scan += len; \
- len = 0; \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- scan = foldbuf + UNISKIP( uvc ); \
- } \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- } \
- } else { \
- uvc = (U32)*uc; \
- len = 1; \
- } \
-} STMT_END
-
-
-
-#define TRIE_LIST_PUSH(state,fid,ns) STMT_START { \
- if ( TRIE_LIST_CUR( state ) >=TRIE_LIST_LEN( state ) ) { \
- U32 ging = TRIE_LIST_LEN( state ) *= 2; \
- Renew( trie->states[ state ].trans.list, ging, reg_trie_trans_le ); \
- } \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).forid = fid; \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).newstate = ns; \
- TRIE_LIST_CUR( state )++; \
-} STMT_END
-
-#define TRIE_LIST_NEW(state) STMT_START { \
- Newxz( trie->states[ state ].trans.list, \
- 4, reg_trie_trans_le ); \
- TRIE_LIST_CUR( state ) = 1; \
- TRIE_LIST_LEN( state ) = 4; \
-} STMT_END
-
-#define TRIE_HANDLE_WORD(state) STMT_START { \
- U16 dupe= trie->states[ state ].wordnum; \
- regnode * const noper_next = regnext( noper ); \
- \
- if (trie->wordlen) \
- trie->wordlen[ curword ] = wordlen; \
- DEBUG_r({ \
- /* store the word for dumping */ \
- SV* tmp; \
- if (OP(noper) != NOTHING) \
- tmp = newSVpvn_utf8(STRING(noper), STR_LEN(noper), UTF); \
- else \
- tmp = newSVpvn_utf8( "", 0, UTF ); \
- av_push( trie_words, tmp ); \
- }); \
- \
- curword++; \
- \
- if ( noper_next < tail ) { \
- if (!trie->jump) \
- trie->jump = (U16 *) PerlMemShared_calloc( word_count + 1, sizeof(U16) ); \
- trie->jump[curword] = (U16)(noper_next - convert); \
- if (!jumper) \
- jumper = noper_next; \
- if (!nextbranch) \
- nextbranch= regnext(cur); \
- } \
- \
- if ( dupe ) { \
- /* So it's a dupe. This means we need to maintain a */\
- /* linked-list from the first to the next. */\
- /* we only allocate the nextword buffer when there */\
- /* a dupe, so first time we have to do the allocation */\
- if (!trie->nextword) \
- trie->nextword = (U16 *) \
- PerlMemShared_calloc( word_count + 1, sizeof(U16)); \
- while ( trie->nextword[dupe] ) \
- dupe= trie->nextword[dupe]; \
- trie->nextword[dupe]= curword; \
- } else { \
- /* we haven't inserted this word yet. */ \
- trie->states[ state ].wordnum = curword; \
- } \
-} STMT_END
-
-
-#define TRIE_TRANS_STATE(state,base,ucharcount,charid,special) \
- ( ( base + charid >= ucharcount \
- && base + charid < ubound \
- && state == trie->trans[ base - ucharcount + charid ].check \
- && trie->trans[ base - ucharcount + charid ].next ) \
- ? trie->trans[ base - ucharcount + charid ].next \
- : ( state==1 ? special : 0 ) \
- )
-
-#define MADE_TRIE 1
-#define MADE_JUMP_TRIE 2
-#define MADE_EXACT_TRIE 4
-
-STATIC I32
-S_make_trie(pTHX_ RExC_state_t *pRExC_state, regnode *startbranch, regnode *first, regnode *last, regnode *tail, U32 word_count, U32 flags, U32 depth)
-{
- dVAR;
- /* first pass, loop through and scan words */
- reg_trie_data *trie;
- HV *widecharmap = NULL;
- AV *revcharmap = newAV();
- regnode *cur;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- STRLEN len = 0;
- UV uvc = 0;
- U16 curword = 0;
- U32 next_alloc = 0;
- regnode *jumper = NULL;
- regnode *nextbranch = NULL;
- regnode *convert = NULL;
- /* we just use folder as a flag in utf8 */
- const U8 * const folder = ( flags == EXACTF
- ? PL_fold
- : ( flags == EXACTFL
- ? PL_fold_locale
- : NULL
- )
- );
-
-#ifdef DEBUGGING
- const U32 data_slot = add_data( pRExC_state, 4, "tuuu" );
- AV *trie_words = NULL;
- /* along with revcharmap, this only used during construction but both are
- * useful during debugging so we store them in the struct when debugging.
- */
-#else
- const U32 data_slot = add_data( pRExC_state, 2, "tu" );
- STRLEN trie_charcount=0;
-#endif
- SV *re_trie_maxbuff;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- trie = (reg_trie_data *) PerlMemShared_calloc( 1, sizeof(reg_trie_data) );
- trie->refcount = 1;
- trie->startstate = 1;
- trie->wordcount = word_count;
- RExC_rxi->data->data[ data_slot ] = (void*)trie;
- trie->charmap = (U16 *) PerlMemShared_calloc( 256, sizeof(U16) );
- if (!(UTF && folder))
- trie->bitmap = (char *) PerlMemShared_calloc( ANYOF_BITMAP_SIZE, 1 );
- DEBUG_r({
- trie_words = newAV();
- });
-
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff)) {
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- DEBUG_OPTIMISE_r({
- PerlIO_printf( Perl_debug_log,
- "%*smake_trie start==%d, first==%d, last==%d, tail==%d depth=%d\n",
- (int)depth * 2 + 2, "",
- REG_NODE_NUM(startbranch),REG_NODE_NUM(first),
- REG_NODE_NUM(last), REG_NODE_NUM(tail),
- (int)depth);
- });
-
- /* Find the node we are going to overwrite */
- if ( first == startbranch && OP( last ) != BRANCH ) {
- /* whole branch chain */
- convert = first;
- } else {
- /* branch sub-chain */
- convert = NEXTOPER( first );
- }
-
- /* -- First loop and Setup --
-
- We first traverse the branches and scan each word to determine if it
- contains widechars, and how many unique chars there are, this is
- important as we have to build a table with at least as many columns as we
- have unique chars.
-
- We use an array of integers to represent the character codes 0..255
- (trie->charmap) and we use a an HV* to store Unicode characters. We use the
- native representation of the character value as the key and IV's for the
- coded index.
-
- *TODO* If we keep track of how many times each character is used we can
- remap the columns so that the table compression later on is more
- efficient in terms of memory by ensuring most common value is in the
- middle and the least common are on the outside. IMO this would be better
- than a most to least common mapping as theres a decent chance the most
- common letter will share a node with the least common, meaning the node
- will not be compressable. With a middle is most common approach the worst
- case is when we have the least common nodes twice.
-
- */
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- STRLEN foldlen = 0;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- const U8 *scan = (U8*)NULL;
- U32 wordlen = 0; /* required init */
- STRLEN chars = 0;
- bool set_bit = trie->bitmap ? 1 : 0; /*store the first char in the bitmap?*/
-
- if (OP(noper) == NOTHING) {
- trie->minlen= 0;
- continue;
- }
- if ( set_bit ) /* bitmap only alloced when !(UTF&&Folding) */
- TRIE_BITMAP_SET(trie,*uc); /* store the raw first byte
- regardless of encoding */
-
- for ( ; uc < e ; uc += len ) {
- TRIE_CHARCOUNT(trie)++;
- TRIE_READ_CHAR;
- chars++;
- if ( uvc < 256 ) {
- if ( !trie->charmap[ uvc ] ) {
- trie->charmap[ uvc ]=( ++trie->uniquecharcount );
- if ( folder )
- trie->charmap[ folder[ uvc ] ] = trie->charmap[ uvc ];
- TRIE_STORE_REVCHAR;
- }
- if ( set_bit ) {
- /* store the codepoint in the bitmap, and if its ascii
- also store its folded equivelent. */
- TRIE_BITMAP_SET(trie,uvc);
-
- /* store the folded codepoint */
- if ( folder ) TRIE_BITMAP_SET(trie,folder[ uvc ]);
-
- if ( !UTF ) {
- /* store first byte of utf8 representation of
- codepoints in the 127 < uvc < 256 range */
- if (127 < uvc && uvc < 192) {
- TRIE_BITMAP_SET(trie,194);
- } else if (191 < uvc ) {
- TRIE_BITMAP_SET(trie,195);
- /* && uvc < 256 -- we know uvc is < 256 already */
- }
- }
- set_bit = 0; /* We've done our bit :-) */
- }
- } else {
- SV** svpp;
- if ( !widecharmap )
- widecharmap = newHV();
-
- svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 1 );
-
- if ( !svpp )
- Perl_croak( aTHX_ "error creating/fetching widecharmap entry for 0x%"UVXf, uvc );
-
- if ( !SvTRUE( *svpp ) ) {
- sv_setiv( *svpp, ++trie->uniquecharcount );
- TRIE_STORE_REVCHAR;
- }
- }
- }
- if( cur == first ) {
- trie->minlen=chars;
- trie->maxlen=chars;
- } else if (chars < trie->minlen) {
- trie->minlen=chars;
- } else if (chars > trie->maxlen) {
- trie->maxlen=chars;
- }
-
- } /* end first pass */
- DEBUG_TRIE_COMPILE_r(
- PerlIO_printf( Perl_debug_log, "%*sTRIE(%s): W:%d C:%d Uq:%d Min:%d Max:%d\n",
- (int)depth * 2 + 2,"",
- ( widecharmap ? "UTF8" : "NATIVE" ), (int)word_count,
- (int)TRIE_CHARCOUNT(trie), trie->uniquecharcount,
- (int)trie->minlen, (int)trie->maxlen )
- );
- trie->wordlen = (U32 *) PerlMemShared_calloc( word_count, sizeof(U32) );
-
- /*
- We now know what we are dealing with in terms of unique chars and
- string sizes so we can calculate how much memory a naive
- representation using a flat table will take. If it's over a reasonable
- limit (as specified by ${^RE_TRIE_MAXBUF}) we use a more memory
- conservative but potentially much slower representation using an array
- of lists.
-
- At the end we convert both representations into the same compressed
- form that will be used in regexec.c for matching with. The latter
- is a form that cannot be used to construct with but has memory
- properties similar to the list form and access properties similar
- to the table form making it both suitable for fast searches and
- small enough that its feasable to store for the duration of a program.
-
- See the comment in the code where the compressed table is produced
- inplace from the flat tabe representation for an explanation of how
- the compression works.
-
- */
-
-
- if ( (IV)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1) > SvIV(re_trie_maxbuff) ) {
- /*
- Second Pass -- Array Of Lists Representation
-
- Each state will be represented by a list of charid:state records
- (reg_trie_trans_le) the first such element holds the CUR and LEN
- points of the allocated array. (See defines above).
-
- We build the initial structure using the lists, and then convert
- it into the compressed table form which allows faster lookups
- (but cant be modified once converted).
- */
-
- STRLEN transcount = 1;
-
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using list compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- TRIE_LIST_NEW(1);
- next_alloc = 2;
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- U32 state = 1; /* required init */
- U16 charid = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if (OP(noper) != NOTHING) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV** const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- if ( !svpp ) {
- charid = 0;
- } else {
- charid=(U16)SvIV( *svpp );
- }
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- if ( charid ) {
-
- U16 check;
- U32 newstate = 0;
-
- charid--;
- if ( !trie->states[ state ].trans.list ) {
- TRIE_LIST_NEW( state );
- }
- for ( check = 1; check <= TRIE_LIST_USED( state ); check++ ) {
- if ( TRIE_LIST_ITEM( state, check ).forid == charid ) {
- newstate = TRIE_LIST_ITEM( state, check ).newstate;
- break;
- }
- }
- if ( ! newstate ) {
- newstate = next_alloc++;
- TRIE_LIST_PUSH( state, charid, newstate );
- transcount++;
- }
- state = newstate;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- }
- }
- TRIE_HANDLE_WORD(state);
-
- } /* end second pass */
-
- /* next alloc is the NEXT state to be allocated */
- trie->statecount = next_alloc;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states,
- next_alloc
- * sizeof(reg_trie_state) );
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_list(trie, widecharmap,
- revcharmap, next_alloc,
- depth+1)
- );
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( transcount, sizeof(reg_trie_trans) );
- {
- U32 state;
- U32 tp = 0;
- U32 zp = 0;
-
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U32 base=0;
-
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, "tp: %d zp: %d ",tp,zp)
- );
- */
-
- if (trie->states[state].trans.list) {
- U16 minid=TRIE_LIST_ITEM( state, 1).forid;
- U16 maxid=minid;
- U16 idx;
-
- for( idx = 2 ; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U16 forid = TRIE_LIST_ITEM( state, idx).forid;
- if ( forid < minid ) {
- minid=forid;
- } else if ( forid > maxid ) {
- maxid=forid;
- }
- }
- if ( transcount < tp + maxid - minid + 1) {
- transcount *= 2;
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans,
- transcount
- * sizeof(reg_trie_trans) );
- Zero( trie->trans + (transcount / 2), transcount / 2 , reg_trie_trans );
- }
- base = trie->uniquecharcount + tp - minid;
- if ( maxid == minid ) {
- U32 set = 0;
- for ( ; zp < tp ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- base = trie->uniquecharcount + zp - minid;
- trie->trans[ zp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ zp ].check = state;
- set = 1;
- break;
- }
- }
- if ( !set ) {
- trie->trans[ tp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ tp ].check = state;
- tp++;
- zp = tp;
- }
- } else {
- for ( idx=1; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U32 tid = base - trie->uniquecharcount + TRIE_LIST_ITEM( state, idx ).forid;
- trie->trans[ tid ].next = TRIE_LIST_ITEM( state, idx ).newstate;
- trie->trans[ tid ].check = state;
- }
- tp += ( maxid - minid + 1 );
- }
- Safefree(trie->states[ state ].trans.list);
- }
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, " base: %d\n",base);
- );
- */
- trie->states[ state ].trans.base=base;
- }
- trie->lasttrans = tp + 1;
- }
- } else {
- /*
- Second Pass -- Flat Table Representation.
-
- we dont use the 0 slot of either trans[] or states[] so we add 1 to each.
- We know that we will need Charcount+1 trans at most to store the data
- (one row per char at worst case) So we preallocate both structures
- assuming worst case.
-
- We then construct the trie using only the .next slots of the entry
- structs.
-
- We use the .check field of the first entry of the node temporarily to
- make compression both faster and easier by keeping track of how many non
- zero fields are in the node.
-
- Since trans are numbered from 1 any 0 pointer in the table is a FAIL
- transition.
-
- There are two terms at use here: state as a TRIE_NODEIDX() which is a
- number representing the first entry of the node, and state as a
- TRIE_NODENUM() which is the trans number. state 1 is TRIE_NODEIDX(1) and
- TRIE_NODENUM(1), state 2 is TRIE_NODEIDX(2) and TRIE_NODENUM(3) if there
- are 2 entrys per node. eg:
-
- A B A B
- 1. 2 4 1. 3 7
- 2. 0 3 3. 0 5
- 3. 0 0 5. 0 0
- 4. 0 0 7. 0 0
-
- The table is internally in the right hand, idx form. However as we also
- have to deal with the states array which is indexed by nodenum we have to
- use TRIE_NODENUM() to convert.
-
- */
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using table compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( ( TRIE_CHARCOUNT(trie) + 1 )
- * trie->uniquecharcount + 1,
- sizeof(reg_trie_trans) );
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- next_alloc = trie->uniquecharcount + 1;
-
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
-
- U32 state = 1; /* required init */
-
- U16 charid = 0; /* sanity init */
- U32 accept_state = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
-
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if ( OP(noper) != NOTHING ) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV* const * const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- charid = svpp ? (U16)SvIV(*svpp) : 0;
- }
- if ( charid ) {
- charid--;
- if ( !trie->trans[ state + charid ].next ) {
- trie->trans[ state + charid ].next = next_alloc;
- trie->trans[ state ].check++;
- next_alloc += trie->uniquecharcount;
- }
- state = trie->trans[ state + charid ].next;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- }
- }
- accept_state = TRIE_NODENUM( state );
- TRIE_HANDLE_WORD(accept_state);
-
- } /* end second pass */
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_table(trie, widecharmap,
- revcharmap,
- next_alloc, depth+1));
-
- {
- /*
- * Inplace compress the table.*
-
- For sparse data sets the table constructed by the trie algorithm will
- be mostly 0/FAIL transitions or to put it another way mostly empty.
- (Note that leaf nodes will not contain any transitions.)
-
- This algorithm compresses the tables by eliminating most such
- transitions, at the cost of a modest bit of extra work during lookup:
-
- - Each states[] entry contains a .base field which indicates the
- index in the state[] array wheres its transition data is stored.
-
- - If .base is 0 there are no valid transitions from that node.
-
- - If .base is nonzero then charid is added to it to find an entry in
- the trans array.
-
- -If trans[states[state].base+charid].check!=state then the
- transition is taken to be a 0/Fail transition. Thus if there are fail
- transitions at the front of the node then the .base offset will point
- somewhere inside the previous nodes data (or maybe even into a node
- even earlier), but the .check field determines if the transition is
- valid.
-
- XXX - wrong maybe?
- The following process inplace converts the table to the compressed
- table: We first do not compress the root node 1,and mark its all its
- .check pointers as 1 and set its .base pointer as 1 as well. This
- allows to do a DFA construction from the compressed table later, and
- ensures that any .base pointers we calculate later are greater than
- 0.
-
- - We set 'pos' to indicate the first entry of the second node.
-
- - We then iterate over the columns of the node, finding the first and
- last used entry at l and m. We then copy l..m into pos..(pos+m-l),
- and set the .check pointers accordingly, and advance pos
- appropriately and repreat for the next node. Note that when we copy
- the next pointers we have to convert them from the original
- NODEIDX form to NODENUM form as the former is not valid post
- compression.
-
- - If a node has no transitions used we mark its base as 0 and do not
- advance the pos pointer.
-
- - If a node only has one transition we use a second pointer into the
- structure to fill in allocated fail transitions from other states.
- This pointer is independent of the main pointer and scans forward
- looking for null transitions that are allocated to a state. When it
- finds one it writes the single transition into the "hole". If the
- pointer doesnt find one the single transition is appended as normal.
-
- - Once compressed we can Renew/realloc the structures to release the
- excess space.
-
- See "Table-Compression Methods" in sec 3.9 of the Red Dragon,
- specifically Fig 3.47 and the associated pseudocode.
-
- demq
- */
- const U32 laststate = TRIE_NODENUM( next_alloc );
- U32 state, charid;
- U32 pos = 0, zp=0;
- trie->statecount = laststate;
-
- for ( state = 1 ; state < laststate ; state++ ) {
- U8 flag = 0;
- const U32 stateidx = TRIE_NODEIDX( state );
- const U32 o_used = trie->trans[ stateidx ].check;
- U32 used = trie->trans[ stateidx ].check;
- trie->trans[ stateidx ].check = 0;
-
- for ( charid = 0 ; used && charid < trie->uniquecharcount ; charid++ ) {
- if ( flag || trie->trans[ stateidx + charid ].next ) {
- if ( trie->trans[ stateidx + charid ].next ) {
- if (o_used == 1) {
- for ( ; zp < pos ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- break;
- }
- }
- trie->states[ state ].trans.base = zp + trie->uniquecharcount - charid ;
- trie->trans[ zp ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ zp ].check = state;
- if ( ++zp > pos ) pos = zp;
- break;
- }
- used--;
- }
- if ( !flag ) {
- flag = 1;
- trie->states[ state ].trans.base = pos + trie->uniquecharcount - charid ;
- }
- trie->trans[ pos ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ pos ].check = state;
- pos++;
- }
- }
- }
- trie->lasttrans = pos + 1;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states, laststate
- * sizeof(reg_trie_state) );
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log,
- "%*sAlloc: %d Orig: %"IVdf" elements, Final:%"IVdf". Savings of %%%5.2f\n",
- (int)depth * 2 + 2,"",
- (int)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1 ),
- (IV)next_alloc,
- (IV)pos,
- ( ( next_alloc - pos ) * 100 ) / (double)next_alloc );
- );
-
- } /* end table compress */
- }
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf(Perl_debug_log, "%*sStatecount:%"UVxf" Lasttrans:%"UVxf"\n",
- (int)depth * 2 + 2, "",
- (UV)trie->statecount,
- (UV)trie->lasttrans)
- );
- /* resize the trans array to remove unused space */
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans, trie->lasttrans
- * sizeof(reg_trie_trans) );
-
- /* and now dump out the compressed format */
- DEBUG_TRIE_COMPILE_r(dump_trie(trie, widecharmap, revcharmap, depth+1));
-
- { /* Modify the program and insert the new TRIE node*/
- U8 nodetype =(U8)(flags & 0xFF);
- char *str=NULL;
-
-#ifdef DEBUGGING
- regnode *optimize = NULL;
-#ifdef RE_TRACK_PATTERN_OFFSETS
-
- U32 mjd_offset = 0;
- U32 mjd_nodelen = 0;
-#endif /* RE_TRACK_PATTERN_OFFSETS */
-#endif /* DEBUGGING */
- /*
- This means we convert either the first branch or the first Exact,
- depending on whether the thing following (in 'last') is a branch
- or not and whther first is the startbranch (ie is it a sub part of
- the alternation or is it the whole thing.)
- Assuming its a sub part we conver the EXACT otherwise we convert
- the whole branch sequence, including the first.
- */
- /* Find the node we are going to overwrite */
- if ( first != startbranch || OP( last ) == BRANCH ) {
- /* branch sub-chain */
- NEXT_OFF( first ) = (U16)(last - first);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_r({
- mjd_offset= Node_Offset((convert));
- mjd_nodelen= Node_Length((convert));
- });
-#endif
- /* whole branch chain */
- }
-#ifdef RE_TRACK_PATTERN_OFFSETS
- else {
- DEBUG_r({
- const regnode *nop = NEXTOPER( convert );
- mjd_offset= Node_Offset((nop));
- mjd_nodelen= Node_Length((nop));
- });
- }
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%*sMJD offset:%"UVuf" MJD length:%"UVuf"\n",
- (int)depth * 2 + 2, "",
- (UV)mjd_offset, (UV)mjd_nodelen)
- );
-#endif
- /* But first we check to see if there is a common prefix we can
- split out as an EXACT and put in front of the TRIE node. */
- trie->startstate= 1;
- if ( trie->bitmap && !widecharmap && !trie->jump ) {
- U32 state;
- for ( state = 1 ; state < trie->statecount-1 ; state++ ) {
- U32 ofs = 0;
- I32 idx = -1;
- U32 count = 0;
- const U32 base = trie->states[ state ].trans.base;
-
- if ( trie->states[state].wordnum )
- count = 1;
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- if ( ++count > 1 ) {
- SV **tmp = av_fetch( revcharmap, ofs, 0);
- const U8 *ch = (U8*)SvPV_nolen_const( *tmp );
- if ( state == 1 ) break;
- if ( count == 2 ) {
- Zero(trie->bitmap, ANYOF_BITMAP_SIZE, char);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*sNew Start State=%"UVuf" Class: [",
- (int)depth * 2 + 2, "",
- (UV)state));
- if (idx >= 0) {
- SV ** const tmp = av_fetch( revcharmap, idx, 0);
- const U8 * const ch = (U8*)SvPV_nolen_const( *tmp );
-
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie, folder[ *ch ]);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%s", (char*)ch)
- );
- }
- }
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie,folder[ *ch ]);
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"%s", ch));
- }
- idx = ofs;
- }
- }
- if ( count == 1 ) {
- SV **tmp = av_fetch( revcharmap, idx, 0);
- STRLEN len;
- char *ch = SvPV( *tmp, len );
- DEBUG_OPTIMISE_r({
- SV *sv=sv_newmortal();
- PerlIO_printf( Perl_debug_log,
- "%*sPrefix State: %"UVuf" Idx:%"UVuf" Char='%s'\n",
- (int)depth * 2 + 2, "",
- (UV)state, (UV)idx,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 6,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- });
- if ( state==1 ) {
- OP( convert ) = nodetype;
- str=STRING(convert);
- STR_LEN(convert)=0;
- }
- STR_LEN(convert) += len;
- while (len--)
- *str++ = *ch++;
- } else {
-#ifdef DEBUGGING
- if (state>1)
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"]\n"));
-#endif
- break;
- }
- }
- if (str) {
- regnode *n = convert+NODE_SZ_STR(convert);
- NEXT_OFF(convert) = NODE_SZ_STR(convert);
- trie->startstate = state;
- trie->minlen -= (state - 1);
- trie->maxlen -= (state - 1);
-#ifdef DEBUGGING
- /* At least the UNICOS C compiler choked on this
- * being argument to DEBUG_r(), so let's just have
- * it right here. */
- if (
-#ifdef PERL_EXT_RE_BUILD
- 1
-#else
- DEBUG_r_TEST
-#endif
- ) {
- regnode *fix = convert;
- U32 word = trie->wordcount;
- mjd_nodelen++;
- Set_Node_Offset_Length(convert, mjd_offset, state - 1);
- while( ++fix < n ) {
- Set_Node_Offset_Length(fix, 0, 0);
- }
- while (word--) {
- SV ** const tmp = av_fetch( trie_words, word, 0 );
- if (tmp) {
- if ( STR_LEN(convert) <= SvCUR(*tmp) )
- sv_chop(*tmp, SvPV_nolen(*tmp) + STR_LEN(convert));
- else
- sv_chop(*tmp, SvPV_nolen(*tmp) + SvCUR(*tmp));
- }
- }
- }
-#endif
- if (trie->maxlen) {
- convert = n;
- } else {
- NEXT_OFF(convert) = (U16)(tail - convert);
- DEBUG_r(optimize= n);
- }
- }
- }
- if (!jumper)
- jumper = last;
- if ( trie->maxlen ) {
- NEXT_OFF( convert ) = (U16)(tail - convert);
- ARG_SET( convert, data_slot );
- /* Store the offset to the first unabsorbed branch in
- jump[0], which is otherwise unused by the jump logic.
- We use this when dumping a trie and during optimisation. */
- if (trie->jump)
- trie->jump[0] = (U16)(nextbranch - convert);
-
- /* XXXX */
- if ( !trie->states[trie->startstate].wordnum && trie->bitmap &&
- ( (char *)jumper - (char *)convert) >= (int)sizeof(struct regnode_charclass) )
- {
- OP( convert ) = TRIEC;
- Copy(trie->bitmap, ((struct regnode_charclass *)convert)->bitmap, ANYOF_BITMAP_SIZE, char);
- PerlMemShared_free(trie->bitmap);
- trie->bitmap= NULL;
- } else
- OP( convert ) = TRIE;
-
- /* store the type in the flags */
- convert->flags = nodetype;
- DEBUG_r({
- optimize = convert
- + NODE_STEP_REGNODE
- + regarglen[ OP( convert ) ];
- });
- /* XXX We really should free up the resource in trie now,
- as we won't use them - (which resources?) dmq */
- }
- /* needed for dumping*/
- DEBUG_r(if (optimize) {
- regnode *opt = convert;
-
- while ( ++opt < optimize) {
- Set_Node_Offset_Length(opt,0,0);
- }
- /*
- Try to clean up some of the debris left after the
- optimisation.
- */
- while( optimize < jumper ) {
- mjd_nodelen += Node_Length((optimize));
- OP( optimize ) = OPTIMIZED;
- Set_Node_Offset_Length(optimize,0,0);
- optimize++;
- }
- Set_Node_Offset_Length(convert,mjd_offset,mjd_nodelen);
- });
- } /* end node insert */
- RExC_rxi->data->data[ data_slot + 1 ] = (void*)widecharmap;
-#ifdef DEBUGGING
- RExC_rxi->data->data[ data_slot + TRIE_WORDS_OFFSET ] = (void*)trie_words;
- RExC_rxi->data->data[ data_slot + 3 ] = (void*)revcharmap;
-#else
- SvREFCNT_dec(revcharmap);
-#endif
- return trie->jump
- ? MADE_JUMP_TRIE
- : trie->startstate>1
- ? MADE_EXACT_TRIE
- : MADE_TRIE;
-}
-
-STATIC void
-S_make_trie_failtable(pTHX_ RExC_state_t *pRExC_state, regnode *source, regnode *stclass, U32 depth)
-{
-/* The Trie is constructed and compressed now so we can build a fail array now if its needed
-
- This is basically the Aho-Corasick algorithm. Its from exercise 3.31 and 3.32 in the
- "Red Dragon" -- Compilers, principles, techniques, and tools. Aho, Sethi, Ullman 1985/88
- ISBN 0-201-10088-6
-
- We find the fail state for each state in the trie, this state is the longest proper
- suffix of the current states 'word' that is also a proper prefix of another word in our
- trie. State 1 represents the word '' and is the thus the default fail state. This allows
- the DFA not to have to restart after its tried and failed a word at a given point, it
- simply continues as though it had been matching the other word in the first place.
- Consider
- 'abcdgu'=~/abcdefg|cdgu/
- When we get to 'd' we are still matching the first word, we would encounter 'g' which would
- fail, which would bring use to the state representing 'd' in the second word where we would
- try 'g' and succeed, prodceding to match 'cdgu'.
- */
- /* add a fail transition */
- const U32 trie_offset = ARG(source);
- reg_trie_data *trie=(reg_trie_data *)RExC_rxi->data->data[trie_offset];
- U32 *q;
- const U32 ucharcount = trie->uniquecharcount;
- const U32 numstates = trie->statecount;
- const U32 ubound = trie->lasttrans + ucharcount;
- U32 q_read = 0;
- U32 q_write = 0;
- U32 charid;
- U32 base = trie->states[ 1 ].trans.base;
- U32 *fail;
- reg_ac_data *aho;
- const U32 data_slot = add_data( pRExC_state, 1, "T" );
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE_FAILTABLE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
-
- ARG_SET( stclass, data_slot );
- aho = (reg_ac_data *) PerlMemShared_calloc( 1, sizeof(reg_ac_data) );
- RExC_rxi->data->data[ data_slot ] = (void*)aho;
- aho->trie=trie_offset;
- aho->states=(reg_trie_state *)PerlMemShared_malloc( numstates * sizeof(reg_trie_state) );
- Copy( trie->states, aho->states, numstates, reg_trie_state );
- Newxz( q, numstates, U32);
- aho->fail = (U32 *) PerlMemShared_calloc( numstates, sizeof(U32) );
- aho->refcount = 1;
- fail = aho->fail;
- /* initialize fail[0..1] to be 1 so that we always have
- a valid final fail state */
- fail[ 0 ] = fail[ 1 ] = 1;
-
- for ( charid = 0; charid < ucharcount ; charid++ ) {
- const U32 newstate = TRIE_TRANS_STATE( 1, base, ucharcount, charid, 0 );
- if ( newstate ) {
- q[ q_write ] = newstate;
- /* set to point at the root */
- fail[ q[ q_write++ ] ]=1;
- }
- }
- while ( q_read < q_write) {
- const U32 cur = q[ q_read++ % numstates ];
- base = trie->states[ cur ].trans.base;
-
- for ( charid = 0 ; charid < ucharcount ; charid++ ) {
- const U32 ch_state = TRIE_TRANS_STATE( cur, base, ucharcount, charid, 1 );
- if (ch_state) {
- U32 fail_state = cur;
- U32 fail_base;
- do {
- fail_state = fail[ fail_state ];
- fail_base = aho->states[ fail_state ].trans.base;
- } while ( !TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ) );
-
- fail_state = TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 );
- fail[ ch_state ] = fail_state;
- if ( !aho->states[ ch_state ].wordnum && aho->states[ fail_state ].wordnum )
- {
- aho->states[ ch_state ].wordnum = aho->states[ fail_state ].wordnum;
- }
- q[ q_write++ % numstates] = ch_state;
- }
- }
- }
- /* restore fail[0..1] to 0 so that we "fall out" of the AC loop
- when we fail in state 1, this allows us to use the
- charclass scan to find a valid start char. This is based on the principle
- that theres a good chance the string being searched contains lots of stuff
- that cant be a start char.
- */
- fail[ 0 ] = fail[ 1 ] = 0;
- DEBUG_TRIE_COMPILE_r({
- PerlIO_printf(Perl_debug_log,
- "%*sStclass Failtable (%"UVuf" states): 0",
- (int)(depth * 2), "", (UV)numstates
- );
- for( q_read=1; q_read<numstates; q_read++ ) {
- PerlIO_printf(Perl_debug_log, ", %"UVuf, (UV)fail[q_read]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
- Safefree(q);
- /*RExC_seen |= REG_SEEN_TRIEDFA;*/
-}
-
-
-/*
- * There are strange code-generation bugs caused on sparc64 by gcc-2.95.2.
- * These need to be revisited when a newer toolchain becomes available.
- */
-#if defined(__sparc64__) && defined(__GNUC__)
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
-# undef SPARC64_GCC_WORKAROUND
-# define SPARC64_GCC_WORKAROUND 1
-# endif
-#endif
-
-#define DEBUG_PEEP(str,scan,depth) \
- DEBUG_OPTIMISE_r({if (scan){ \
- SV * const mysv=sv_newmortal(); \
- regnode *Next = regnext(scan); \
- regprop(RExC_rx, mysv, scan); \
- PerlIO_printf(Perl_debug_log, "%*s" str ">%3d: %s (%d)\n", \
- (int)depth*2, "", REG_NODE_NUM(scan), SvPV_nolen_const(mysv),\
- Next ? (REG_NODE_NUM(Next)) : 0 ); \
- }});
-
-
-
-
-
-#define JOIN_EXACT(scan,min,flags) \
- if (PL_regkind[OP(scan)] == EXACT) \
- join_exact(pRExC_state,(scan),(min),(flags),NULL,depth+1)
-
-STATIC U32
-S_join_exact(pTHX_ RExC_state_t *pRExC_state, regnode *scan, I32 *min, U32 flags,regnode *val, U32 depth) {
- /* Merge several consecutive EXACTish nodes into one. */
- regnode *n = regnext(scan);
- U32 stringok = 1;
- regnode *next = scan + NODE_SZ_STR(scan);
- U32 merged = 0;
- U32 stopnow = 0;
-#ifdef DEBUGGING
- regnode *stop = scan;
- GET_RE_DEBUG_FLAGS_DECL;
-#else
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_JOIN_EXACT;
-#ifndef EXPERIMENTAL_INPLACESCAN
- PERL_UNUSED_ARG(flags);
- PERL_UNUSED_ARG(val);
-#endif
- DEBUG_PEEP("join",scan,depth);
-
- /* Skip NOTHING, merge EXACT*. */
- while (n &&
- ( PL_regkind[OP(n)] == NOTHING ||
- (stringok && (OP(n) == OP(scan))))
- && NEXT_OFF(n)
- && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) {
-
- if (OP(n) == TAIL || n > next)
- stringok = 0;
- if (PL_regkind[OP(n)] == NOTHING) {
- DEBUG_PEEP("skip:",n,depth);
- NEXT_OFF(scan) += NEXT_OFF(n);
- next = n + NODE_STEP_REGNODE;
-#ifdef DEBUGGING
- if (stringok)
- stop = n;
-#endif
- n = regnext(n);
- }
- else if (stringok) {
- const unsigned int oldl = STR_LEN(scan);
- regnode * const nnext = regnext(n);
-
- DEBUG_PEEP("merg",n,depth);
-
- merged++;
- if (oldl + STR_LEN(n) > U8_MAX)
- break;
- NEXT_OFF(scan) += NEXT_OFF(n);
- STR_LEN(scan) += STR_LEN(n);
- next = n + NODE_SZ_STR(n);
- /* Now we can overwrite *n : */
- Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char);
-#ifdef DEBUGGING
- stop = next - 1;
-#endif
- n = nnext;
- if (stopnow) break;
- }
-
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (flags && !NEXT_OFF(n)) {
- DEBUG_PEEP("atch", val, depth);
- if (reg_off_by_arg[OP(n)]) {
- ARG_SET(n, val - n);
- }
- else {
- NEXT_OFF(n) = val - n;
- }
- stopnow = 1;
- }
-#endif
- }
-
- if (UTF && ( OP(scan) == EXACTF ) && ( STR_LEN(scan) >= 6 ) ) {
- /*
- Two problematic code points in Unicode casefolding of EXACT nodes:
-
- U+0390 - GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS
- U+03B0 - GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS
-
- which casefold to
-
- Unicode UTF-8
-
- U+03B9 U+0308 U+0301 0xCE 0xB9 0xCC 0x88 0xCC 0x81
- U+03C5 U+0308 U+0301 0xCF 0x85 0xCC 0x88 0xCC 0x81
-
- This means that in case-insensitive matching (or "loose matching",
- as Unicode calls it), an EXACTF of length six (the UTF-8 encoded byte
- length of the above casefolded versions) can match a target string
- of length two (the byte length of UTF-8 encoded U+0390 or U+03B0).
- This would rather mess up the minimum length computation.
-
- What we'll do is to look for the tail four bytes, and then peek
- at the preceding two bytes to see whether we need to decrease
- the minimum length by four (six minus two).
-
- Thanks to the design of UTF-8, there cannot be false matches:
- A sequence of valid UTF-8 bytes cannot be a subsequence of
- another valid sequence of UTF-8 bytes.
-
- */
- char * const s0 = STRING(scan), *s, *t;
- char * const s1 = s0 + STR_LEN(scan) - 1;
- char * const s2 = s1 - 4;
-#ifdef EBCDIC /* RD tunifold greek 0390 and 03B0 */
- const char t0[] = "\xaf\x49\xaf\x42";
-#else
- const char t0[] = "\xcc\x88\xcc\x81";
-#endif
- const char * const t1 = t0 + 3;
-
- for (s = s0 + 2;
- s < s2 && (t = ninstr(s, s1, t0, t1));
- s = t + 4) {
-#ifdef EBCDIC
- if (((U8)t[-1] == 0x68 && (U8)t[-2] == 0xB4) ||
- ((U8)t[-1] == 0x46 && (U8)t[-2] == 0xB5))
-#else
- if (((U8)t[-1] == 0xB9 && (U8)t[-2] == 0xCE) ||
- ((U8)t[-1] == 0x85 && (U8)t[-2] == 0xCF))
-#endif
- *min -= 4;
- }
- }
-
-#ifdef DEBUGGING
- /* Allow dumping */
- n = scan + NODE_SZ_STR(scan);
- while (n <= stop) {
- if (PL_regkind[OP(n)] != NOTHING || OP(n) == NOTHING) {
- OP(n) = OPTIMIZED;
- NEXT_OFF(n) = 0;
- }
- n++;
- }
-#endif
- DEBUG_OPTIMISE_r(if (merged){DEBUG_PEEP("finl",scan,depth)});
- return stopnow;
-}
-
-/* REx optimizer. Converts nodes into quickier variants "in place".
- Finds fixed substrings. */
-
-/* Stops at toplevel WHILEM as well as at "last". At end *scanp is set
- to the position after last scanned or to NULL. */
-
-#define INIT_AND_WITHP \
- assert(!and_withp); \
- Newx(and_withp,1,struct regnode_charclass_class); \
- SAVEFREEPV(and_withp)
-
-/* this is a chain of data about sub patterns we are processing that
- need to be handled seperately/specially in study_chunk. Its so
- we can simulate recursion without losing state. */
-struct scan_frame;
-typedef struct scan_frame {
- regnode *last; /* last node to process in this frame */
- regnode *next; /* next node to process when last is reached */
- struct scan_frame *prev; /*previous frame*/
- I32 stop; /* what stopparen do we use */
-} scan_frame;
-
-
-#define SCAN_COMMIT(s, data, m) scan_commit(s, data, m, is_inf)
-
-#define CASE_SYNST_FNC(nAmE) \
-case nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break; \
-case N ## nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break
-
-
-
-STATIC I32
-S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp,
- I32 *minlenp, I32 *deltap,
- regnode *last,
- scan_data_t *data,
- I32 stopparen,
- U8* recursed,
- struct regnode_charclass_class *and_withp,
- U32 flags, U32 depth)
- /* scanp: Start here (read-write). */
- /* deltap: Write maxlen-minlen here. */
- /* last: Stop before this one. */
- /* data: string data about the pattern */
- /* stopparen: treat close N as END */
- /* recursed: which subroutines have we recursed into */
- /* and_withp: Valid if flags & SCF_DO_STCLASS_OR */
-{
- dVAR;
- I32 min = 0, pars = 0, code;
- regnode *scan = *scanp, *next;
- I32 delta = 0;
- int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF);
- int is_inf_internal = 0; /* The studied chunk is infinite */
- I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0;
- scan_data_t data_fake;
- SV *re_trie_maxbuff = NULL;
- regnode *first_non_open = scan;
- I32 stopmin = I32_MAX;
- scan_frame *frame = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_STUDY_CHUNK;
-
-#ifdef DEBUGGING
- StructCopy(&zero_scan_data, &data_fake, scan_data_t);
-#endif
-
- if ( depth == 0 ) {
- while (first_non_open && OP(first_non_open) == OPEN)
- first_non_open=regnext(first_non_open);
- }
-
-
- fake_study_recurse:
- while ( scan && OP(scan) != END && scan < last ){
- /* Peephole optimizer: */
- DEBUG_STUDYDATA("Peep:", data,depth);
- DEBUG_PEEP("Peep",scan,depth);
- JOIN_EXACT(scan,&min,0);
-
- /* Follow the next-chain of the current node and optimize
- away all the NOTHINGs from it. */
- if (OP(scan) != CURLYX) {
- const int max = (reg_off_by_arg[OP(scan)]
- ? I32_MAX
- /* I32 may be smaller than U16 on CRAYs! */
- : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX));
- int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan));
- int noff;
- regnode *n = scan;
-
- /* Skip NOTHING and LONGJMP. */
- while ((n = regnext(n))
- && ((PL_regkind[OP(n)] == NOTHING && (noff = NEXT_OFF(n)))
- || ((OP(n) == LONGJMP) && (noff = ARG(n))))
- && off + noff < max)
- off += noff;
- if (reg_off_by_arg[OP(scan)])
- ARG(scan) = off;
- else
- NEXT_OFF(scan) = off;
- }
-
-
-
- /* The principal pseudo-switch. Cannot be a switch, since we
- look into several different things. */
- if (OP(scan) == BRANCH || OP(scan) == BRANCHJ
- || OP(scan) == IFTHEN) {
- next = regnext(scan);
- code = OP(scan);
- /* demq: the op(next)==code check is to see if we have "branch-branch" AFAICT */
-
- if (OP(next) == code || code == IFTHEN) {
- /* NOTE - There is similar code to this block below for handling
- TRIE nodes on a re-study. If you change stuff here check there
- too. */
- I32 max1 = 0, min1 = I32_MAX, num = 0;
- struct regnode_charclass_class accum;
- regnode * const startbranch=scan;
-
- if (flags & SCF_DO_SUBSTR)
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- while (OP(scan) == code) {
- I32 deltanext, minnext, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- num++;
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
-
- data_fake.pos_delta = delta;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- if (code != BRANCH)
- scan = NEXTOPER(scan);
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- /* we suppose the run is continuous, last=next...*/
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- next, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- if (min1 > minnext)
- min1 = minnext;
- if (max1 < minnext + deltanext)
- max1 = minnext + deltanext;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
- scan = next;
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > minnext)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- if (code == IFTHEN && num < 2) /* Empty ELSE branch */
- min1 = 0;
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
-
- if (PERL_ENABLE_TRIE_OPTIMISATION && OP( startbranch ) == BRANCH ) {
- /* demq.
-
- Assuming this was/is a branch we are dealing with: 'scan' now
- points at the item that follows the branch sequence, whatever
- it is. We now start at the beginning of the sequence and look
- for subsequences of
-
- BRANCH->EXACT=>x1
- BRANCH->EXACT=>x2
- tail
-
- which would be constructed from a pattern like /A|LIST|OF|WORDS/
-
- If we can find such a subseqence we need to turn the first
- element into a trie and then add the subsequent branch exact
- strings to the trie.
-
- We have two cases
-
- 1. patterns where the whole set of branch can be converted.
-
- 2. patterns where only a subset can be converted.
-
- In case 1 we can replace the whole set with a single regop
- for the trie. In case 2 we need to keep the start and end
- branchs so
-
- 'BRANCH EXACT; BRANCH EXACT; BRANCH X'
- becomes BRANCH TRIE; BRANCH X;
-
- There is an additional case, that being where there is a
- common prefix, which gets split out into an EXACT like node
- preceding the TRIE node.
-
- If x(1..n)==tail then we can do a simple trie, if not we make
- a "jump" trie, such that when we match the appropriate word
- we "jump" to the appopriate tail node. Essentailly we turn
- a nested if into a case structure of sorts.
-
- */
-
- int made=0;
- if (!re_trie_maxbuff) {
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff))
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- if ( SvIV(re_trie_maxbuff)>=0 ) {
- regnode *cur;
- regnode *first = (regnode *)NULL;
- regnode *last = (regnode *)NULL;
- regnode *tail = scan;
- U8 optype = 0;
- U32 count=0;
-
-#ifdef DEBUGGING
- SV * const mysv = sv_newmortal(); /* for dumping */
-#endif
- /* var tail is used because there may be a TAIL
- regop in the way. Ie, the exacts will point to the
- thing following the TAIL, but the last branch will
- point at the TAIL. So we advance tail. If we
- have nested (?:) we may have to move through several
- tails.
- */
-
- while ( OP( tail ) == TAIL ) {
- /* this is the TAIL generated by (?:) */
- tail = regnext( tail );
- }
-
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, tail );
- PerlIO_printf( Perl_debug_log, "%*s%s%s\n",
- (int)depth * 2 + 2, "",
- "Looking for TRIE'able sequences. Tail node is: ",
- SvPV_nolen_const( mysv )
- );
- });
-
- /*
-
- step through the branches, cur represents each
- branch, noper is the first thing to be matched
- as part of that branch and noper_next is the
- regnext() of that node. if noper is an EXACT
- and noper_next is the same as scan (our current
- position in the regex) then the EXACT branch is
- a possible optimization target. Once we have
- two or more consequetive such branches we can
- create a trie of the EXACT's contents and stich
- it in place. If the sequence represents all of
- the branches we eliminate the whole thing and
- replace it with a single TRIE. If it is a
- subsequence then we need to stitch it in. This
- means the first branch has to remain, and needs
- to be repointed at the item on the branch chain
- following the last branch optimized. This could
- be either a BRANCH, in which case the
- subsequence is internal, or it could be the
- item following the branch sequence in which
- case the subsequence is at the end.
-
- */
-
- /* dont use tail as the end marker for this traverse */
- for ( cur = startbranch ; cur != scan ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
-#if defined(DEBUGGING) || defined(NOJUMPTRIE)
- regnode * const noper_next = regnext( noper );
-#endif
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log, "%*s- %s (%d)",
- (int)depth * 2 + 2,"", SvPV_nolen_const( mysv ), REG_NODE_NUM(cur) );
-
- regprop(RExC_rx, mysv, noper);
- PerlIO_printf( Perl_debug_log, " -> %s",
- SvPV_nolen_const(mysv));
-
- if ( noper_next ) {
- regprop(RExC_rx, mysv, noper_next );
- PerlIO_printf( Perl_debug_log,"\t=> %s\t",
- SvPV_nolen_const(mysv));
- }
- PerlIO_printf( Perl_debug_log, "(First==%d,Last==%d,Cur==%d)\n",
- REG_NODE_NUM(first), REG_NODE_NUM(last), REG_NODE_NUM(cur) );
- });
- if ( (((first && optype!=NOTHING) ? OP( noper ) == optype
- : PL_regkind[ OP( noper ) ] == EXACT )
- || OP(noper) == NOTHING )
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- && count < U16_MAX)
- {
- count++;
- if ( !first || optype == NOTHING ) {
- if (!first) first = cur;
- optype = OP( noper );
- } else {
- last = cur;
- }
- } else {
-/*
- Currently we do not believe that the trie logic can
- handle case insensitive matching properly when the
- pattern is not unicode (thus forcing unicode semantics).
-
- If/when this is fixed the following define can be swapped
- in below to fully enable trie logic.
-
-#define TRIE_TYPE_IS_SAFE 1
-
-*/
-#define TRIE_TYPE_IS_SAFE (UTF || optype==EXACT)
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- make_trie( pRExC_state,
- startbranch, first, cur, tail, count,
- optype, depth+1 );
- }
- if ( PL_regkind[ OP( noper ) ] == EXACT
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- ){
- count = 1;
- first = cur;
- optype = OP( noper );
- } else {
- count = 0;
- first = NULL;
- optype = 0;
- }
- last = NULL;
- }
- }
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log,
- "%*s- %s (%d) <SCAN FINISHED>\n", (int)depth * 2 + 2,
- "", SvPV_nolen_const( mysv ),REG_NODE_NUM(cur));
-
- });
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- made= make_trie( pRExC_state, startbranch, first, scan, tail, count, optype, depth+1 );
-#ifdef TRIE_STUDY_OPT
- if ( ((made == MADE_EXACT_TRIE &&
- startbranch == first)
- || ( first_non_open == first )) &&
- depth==0 ) {
- flags |= SCF_TRIE_RESTUDY;
- if ( startbranch == first
- && scan == tail )
- {
- RExC_seen &=~REG_TOP_LEVEL_BRANCHES;
- }
- }
-#endif
- }
- }
-
- } /* do trie */
-
- }
- else if ( code == BRANCHJ ) { /* single branch is optimized. */
- scan = NEXTOPER(NEXTOPER(scan));
- } else /* single branch is optimized. */
- scan = NEXTOPER(scan);
- continue;
- } else if (OP(scan) == SUSPEND || OP(scan) == GOSUB || OP(scan) == GOSTART) {
- scan_frame *newframe = NULL;
- I32 paren;
- regnode *start;
- regnode *end;
-
- if (OP(scan) != SUSPEND) {
- /* set the pointer */
- if (OP(scan) == GOSUB) {
- paren = ARG(scan);
- RExC_recurse[ARG2L(scan)] = scan;
- start = RExC_open_parens[paren-1];
- end = RExC_close_parens[paren-1];
- } else {
- paren = 0;
- start = RExC_rxi->program + 1;
- end = RExC_opend;
- }
- if (!recursed) {
- Newxz(recursed, (((RExC_npar)>>3) +1), U8);
- SAVEFREEPV(recursed);
- }
- if (!PAREN_TEST(recursed,paren+1)) {
- PAREN_SET(recursed,paren+1);
- Newx(newframe,1,scan_frame);
- } else {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- } else {
- Newx(newframe,1,scan_frame);
- paren = stopparen;
- start = scan+2;
- end = regnext(scan);
- }
- if (newframe) {
- assert(start);
- assert(end);
- SAVEFREEPV(newframe);
- newframe->next = regnext(scan);
- newframe->last = last;
- newframe->stop = stopparen;
- newframe->prev = frame;
-
- frame = newframe;
- scan = start;
- stopparen = paren;
- last = end;
-
- continue;
- }
- }
- else if (OP(scan) == EXACT) {
- I32 l = STR_LEN(scan);
- UV uc;
- if (UTF) {
- const U8 * const s = (U8*)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- } else {
- uc = *((U8*)STRING(scan));
- }
- min += l;
- if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */
- /* The code below prefers earlier match for fixed
- offset, later match for variable offset. */
- if (data->last_end == -1) { /* Update the start info. */
- data->last_start_min = data->pos_min;
- data->last_start_max = is_inf
- ? I32_MAX : data->pos_min + data->pos_delta;
- }
- sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan));
- if (UTF)
- SvUTF8_on(data->last_found);
- {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += utf8_length((U8*)STRING(scan),
- (U8*)STRING(scan)+STR_LEN(scan));
- }
- data->last_end = data->pos_min + l;
- data->pos_min += l; /* As in the first entry. */
- data->flags &= ~SF_BEFORE_EOL;
- }
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && (!(data->start_class->flags & ANYOF_FOLD)
- || !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- )
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- if (uc < 0x100)
- data->start_class->flags &= ~ANYOF_UNICODE_ALL;
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- /* false positive possible if the class is case-folded */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- else
- data->start_class->flags |= ANYOF_UNICODE_ALL;
- data->start_class->flags &= ~ANYOF_EOS;
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (PL_regkind[OP(scan)] == EXACT) { /* But OP != EXACT! */
- I32 l = STR_LEN(scan);
- UV uc = *((U8*)STRING(scan));
-
- /* Search for fixed substrings supports EXACT only. */
- if (flags & SCF_DO_SUBSTR) {
- assert(data);
- SCAN_COMMIT(pRExC_state, data, minlenp);
- }
- if (UTF) {
- const U8 * const s = (U8 *)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- }
- min += l;
- if (flags & SCF_DO_SUBSTR)
- data->pos_min += l;
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat) {
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- data->start_class->flags |= ANYOF_FOLD;
- if (OP(scan) == EXACTFL)
- data->start_class->flags |= ANYOF_LOCALE;
- }
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- if (data->start_class->flags & ANYOF_FOLD) {
- /* false positive possible if the class is case-folded.
- Assume that the locale settings are the same... */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- }
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (strchr((const char*)PL_varies,OP(scan))) {
- I32 mincount, maxcount, minnext, deltanext, fl = 0;
- I32 f = flags, pos_before = 0;
- regnode * const oscan = scan;
- struct regnode_charclass_class this_class;
- struct regnode_charclass_class *oclass = NULL;
- I32 next_is_eval = 0;
-
- switch (PL_regkind[OP(scan)]) {
- case WHILEM: /* End of (?:...)* . */
- scan = NEXTOPER(scan);
- goto finish;
- case PLUS:
- if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) {
- next = NEXTOPER(scan);
- if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) {
- mincount = 1;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- }
- if (flags & SCF_DO_SUBSTR)
- data->pos_min++;
- min++;
- /* Fall through. */
- case STAR:
- if (flags & SCF_DO_STCLASS) {
- mincount = 0;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- is_inf = is_inf_internal = 1;
- scan = regnext(scan);
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot extend fixed substrings */
- data->longest = &(data->longest_float);
- }
- goto optimize_curly_tail;
- case CURLY:
- if (stopparen>0 && (OP(scan)==CURLYN || OP(scan)==CURLYM)
- && (scan->flags == stopparen))
- {
- mincount = 1;
- maxcount = 1;
- } else {
- mincount = ARG1(scan);
- maxcount = ARG2(scan);
- }
- next = regnext(scan);
- if (OP(scan) == CURLYX) {
- I32 lp = (data ? *(data->last_closep) : 0);
- scan->flags = ((lp <= (I32)U8_MAX) ? (U8)lp : U8_MAX);
- }
- scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- next_is_eval = (OP(scan) == EVAL);
- do_curly:
- if (flags & SCF_DO_SUBSTR) {
- if (mincount == 0) SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot extend fixed substrings */
- pos_before = data->pos_min;
- }
- if (data) {
- fl = data->flags;
- data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL);
- if (is_inf)
- data->flags |= SF_IS_INF;
- }
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- oclass = data->start_class;
- data->start_class = &this_class;
- f |= SCF_DO_STCLASS_AND;
- f &= ~SCF_DO_STCLASS_OR;
- }
- /* These are the cases when once a subexpression
- fails at a particular position, it cannot succeed
- even after backtracking at the enclosing scope.
-
- XXXX what if minimal match and we are at the
- initial run of {n,m}? */
- if ((mincount != maxcount - 1) && (maxcount != REG_INFTY))
- f &= ~SCF_WHILEM_VISITED_POS;
-
- /* This will finish on WHILEM, setting scan, or on NULL: */
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- last, data, stopparen, recursed, NULL,
- (mincount == 0
- ? (f & ~SCF_DO_SUBSTR) : f),depth+1);
-
- if (flags & SCF_DO_STCLASS)
- data->start_class = oclass;
- if (mincount == 0 || minnext == 0) {
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&this_class, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- } else { /* Non-zero len */
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- cl_and(data->start_class, and_withp);
- }
- else if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class, &this_class);
- flags &= ~SCF_DO_STCLASS;
- }
- if (!scan) /* It was not CURLYX, but CURLY. */
- scan = next;
- if ( /* ? quantifier ok, except for (?{ ... }) */
- (next_is_eval || !(mincount == 0 && maxcount == 1))
- && (minnext == 0) && (deltanext == 0)
- && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR))
- && maxcount <= REG_INFTY/3) /* Complement check for big count */
- {
- ckWARNreg(RExC_parse,
- "Quantifier unexpected on zero-length expression");
- }
-
- min += minnext * mincount;
- is_inf_internal |= ((maxcount == REG_INFTY
- && (minnext + deltanext) > 0)
- || deltanext == I32_MAX);
- is_inf |= is_inf_internal;
- delta += (minnext + deltanext) * maxcount - minnext * mincount;
-
- /* Try powerful optimization CURLYX => CURLYN. */
- if ( OP(oscan) == CURLYX && data
- && data->flags & SF_IN_PAR
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext && minnext == 1 ) {
- /* Try to optimize to CURLYN. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS;
- regnode * const nxt1 = nxt;
-#ifdef DEBUGGING
- regnode *nxt2;
-#endif
-
- /* Skip open. */
- nxt = regnext(nxt);
- if (!strchr((const char*)PL_simple,OP(nxt))
- && !(PL_regkind[OP(nxt)] == EXACT
- && STR_LEN(nxt) == 1))
- goto nogo;
-#ifdef DEBUGGING
- nxt2 = nxt;
-#endif
- nxt = regnext(nxt);
- if (OP(nxt) != CLOSE)
- goto nogo;
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt+2; /*close->while*/
- }
- /* Now we know that nxt2 is the only contents: */
- oscan->flags = (U8)ARG(nxt);
- OP(oscan) = CURLYN;
- OP(nxt1) = NOTHING; /* was OPEN. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */
-#endif
- }
- nogo:
-
- /* Try optimization CURLYX => CURLYM. */
- if ( OP(oscan) == CURLYX && data
- && !(data->flags & SF_HAS_PAR)
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext /* atom is fixed width */
- && minnext != 0 /* CURLYM can't handle zero width */
- ) {
- /* XXXX How to optimize if data == 0? */
- /* Optimize to a simpler form. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */
- regnode *nxt2;
-
- OP(oscan) = CURLYM;
- while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/
- && (OP(nxt2) != WHILEM))
- nxt = nxt2;
- OP(nxt2) = SUCCEED; /* Whas WHILEM */
- /* Need to optimize away parenths. */
- if (data->flags & SF_IN_PAR) {
- /* Set the parenth number. */
- regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/
-
- if (OP(nxt) != CLOSE)
- FAIL("Panic opt close");
- oscan->flags = (U8)ARG(nxt);
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt2+1; /*close->NOTHING*/
- }
- OP(nxt1) = OPTIMIZED; /* was OPEN. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */
-#endif
-#if 0
- while ( nxt1 && (OP(nxt1) != WHILEM)) {
- regnode *nnxt = regnext(nxt1);
-
- if (nnxt == nxt) {
- if (reg_off_by_arg[OP(nxt1)])
- ARG_SET(nxt1, nxt2 - nxt1);
- else if (nxt2 - nxt1 < U16_MAX)
- NEXT_OFF(nxt1) = nxt2 - nxt1;
- else
- OP(nxt) = NOTHING; /* Cannot beautify */
- }
- nxt1 = nnxt;
- }
-#endif
- /* Optimize again: */
- study_chunk(pRExC_state, &nxt1, minlenp, &deltanext, nxt,
- NULL, stopparen, recursed, NULL, 0,depth+1);
- }
- else
- oscan->flags = 0;
- }
- else if ((OP(oscan) == CURLYX)
- && (flags & SCF_WHILEM_VISITED_POS)
- /* See the comment on a similar expression above.
- However, this time it not a subexpression
- we care about, but the expression itself. */
- && (maxcount == REG_INFTY)
- && data && ++data->whilem_c < 16) {
- /* This stays as CURLYX, we can put the count/of pair. */
- /* Find WHILEM (as in regexec.c) */
- regnode *nxt = oscan + NEXT_OFF(oscan);
-
- if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */
- nxt += ARG(nxt);
- PREVOPER(nxt)->flags = (U8)(data->whilem_c
- | (RExC_whilem_seen << 4)); /* On WHILEM */
- }
- if (data && fl & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (flags & SCF_DO_SUBSTR) {
- SV *last_str = NULL;
- int counted = mincount != 0;
-
- if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */
-#if defined(SPARC64_GCC_WORKAROUND)
- I32 b = 0;
- STRLEN l = 0;
- const char *s = NULL;
- I32 old = 0;
-
- if (pos_before >= data->last_start_min)
- b = pos_before;
- else
- b = data->last_start_min;
-
- l = 0;
- s = SvPV_const(data->last_found, l);
- old = b - data->last_start_min;
-
-#else
- I32 b = pos_before >= data->last_start_min
- ? pos_before : data->last_start_min;
- STRLEN l;
- const char * const s = SvPV_const(data->last_found, l);
- I32 old = b - data->last_start_min;
-#endif
-
- if (UTF)
- old = utf8_hop((U8*)s, old) - (U8*)s;
-
- l -= old;
- /* Get the added string: */
- last_str = newSVpvn_utf8(s + old, l, UTF);
- if (deltanext == 0 && pos_before == b) {
- /* What was added is a constant string */
- if (mincount > 1) {
- SvGROW(last_str, (mincount * l) + 1);
- repeatcpy(SvPVX(last_str) + l,
- SvPVX_const(last_str), l, mincount - 1);
- SvCUR_set(last_str, SvCUR(last_str) * mincount);
- /* Add additional parts. */
- SvCUR_set(data->last_found,
- SvCUR(data->last_found) - l);
- sv_catsv(data->last_found, last_str);
- {
- SV * sv = data->last_found;
- MAGIC *mg =
- SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += CHR_SVLEN(last_str) - l;
- }
- data->last_end += l * (mincount - 1);
- }
- } else {
- /* start offset must point into the last copy */
- data->last_start_min += minnext * (mincount - 1);
- data->last_start_max += is_inf ? I32_MAX
- : (maxcount - 1) * (minnext + data->pos_delta);
- }
- }
- /* It is counted once already... */
- data->pos_min += minnext * (mincount - counted);
- data->pos_delta += - counted * deltanext +
- (minnext + deltanext) * maxcount - minnext * mincount;
- if (mincount != maxcount) {
- /* Cannot extend fixed substrings found inside
- the group. */
- SCAN_COMMIT(pRExC_state,data,minlenp);
- if (mincount && last_str) {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
-
- if (mg)
- mg->mg_len = -1;
- sv_setsv(sv, last_str);
- data->last_end = data->pos_min;
- data->last_start_min =
- data->pos_min - CHR_SVLEN(last_str);
- data->last_start_max = is_inf
- ? I32_MAX
- : data->pos_min + data->pos_delta
- - CHR_SVLEN(last_str);
- }
- data->longest = &(data->longest_float);
- }
- SvREFCNT_dec(last_str);
- }
- if (data && (fl & SF_HAS_EVAL))
- data->flags |= SF_HAS_EVAL;
- optimize_curly_tail:
- if (OP(oscan) != CURLYX) {
- while (PL_regkind[OP(next = regnext(oscan))] == NOTHING
- && NEXT_OFF(next))
- NEXT_OFF(oscan) += NEXT_OFF(next);
- }
- continue;
- default: /* REF and CLUMP only? */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR)
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- break;
- }
- }
- else if (OP(scan) == LNBREAK) {
- if (flags & SCF_DO_STCLASS) {
- int value = 0;
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
- if (flags & SCF_DO_STCLASS_AND) {
- for (value = 0; value < 256; value++)
- if (!is_VERTWS_cp(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- for (value = 0; value < 256; value++)
- if (is_VERTWS_cp(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- min += 1;
- delta += 1;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += 1;
- data->longest = &(data->longest_float);
- }
-
- }
- else if (OP(scan) == FOLDCHAR) {
- int d = ARG(scan)==0xDF ? 1 : 2;
- flags &= ~SCF_DO_STCLASS;
- min += 1;
- delta += d;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += d;
- data->longest = &(data->longest_float);
- }
- }
- else if (strchr((const char*)PL_simple,OP(scan))) {
- int value = 0;
-
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->pos_min++;
- }
- min++;
- if (flags & SCF_DO_STCLASS) {
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
-
- /* Some of the logic below assumes that switching
- locale on will only add false positives. */
- switch (PL_regkind[OP(scan)]) {
- case SANY:
- default:
- do_default:
- /* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- break;
- case REG_ANY:
- if (OP(scan) == SANY)
- goto do_default;
- if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */
- value = (ANYOF_BITMAP_TEST(data->start_class,'\n')
- || (data->start_class->flags & ANYOF_CLASS));
- cl_anything(pRExC_state, data->start_class);
- }
- if (flags & SCF_DO_STCLASS_AND || !value)
- ANYOF_BITMAP_CLEAR(data->start_class,'\n');
- break;
- case ANYOF:
- if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class,
- (struct regnode_charclass_class*)scan);
- else
- cl_or(pRExC_state, data->start_class,
- (struct regnode_charclass_class*)scan);
- break;
- case ALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case ALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- }
- else {
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- data->start_class->flags |= ANYOF_LOCALE;
- }
- break;
- case NALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- }
- break;
- case SPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- else {
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case SPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- }
- break;
- case NSPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- else {
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NSPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- }
- break;
- case DIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT);
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NDIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT);
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- CASE_SYNST_FNC(VERTWS);
- CASE_SYNST_FNC(HORIZWS);
-
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (PL_regkind[OP(scan)] == EOL && flags & SCF_DO_SUBSTR) {
- data->flags |= (OP(scan) == MEOL
- ? SF_BEFORE_MEOL
- : SF_BEFORE_SEOL);
- }
- else if ( PL_regkind[OP(scan)] == BRANCHJ
- /* Lookbehind, or need to calculate parens/evals/stclass: */
- && (scan->flags || data || (flags & SCF_DO_STCLASS))
- && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) {
- if ( !PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- || OP(scan) == UNLESSM )
- {
- /* Negative Lookahead/lookbehind
- In this case we can't do fixed string optimisation.
- */
-
- I32 deltanext, minnext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
- minnext = study_chunk(pRExC_state, &nscan, minlenp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f, depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (minnext > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)minnext;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (f & SCF_DO_STCLASS_AND) {
- if (flags & SCF_DO_STCLASS_OR) {
- /* OR before, AND after: ideally we would recurse with
- * data_fake to get the AND applied by study of the
- * remainder of the pattern, and then derecurse;
- * *** HACK *** for now just treat as "no information".
- * See [perl #56690].
- */
- cl_init(pRExC_state, data->start_class);
- } else {
- /* AND before and after: combine and continue */
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- }
-#if PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- else {
- /* Positive Lookahead/lookbehind
- In this case we can do fixed string optimisation,
- but we must be careful about it. Note in the case of
- lookbehind the positions will be offset by the minimum
- length of the pattern, something we won't know about
- until after the recurse.
- */
- I32 deltanext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
- /* We use SAVEFREEPV so that when the full compile
- is finished perl will clean up the allocated
- minlens when its all done. This was we don't
- have to worry about freeing them when we know
- they wont be used, which would be a pain.
- */
- I32 *minnextp;
- Newx( minnextp, 1, I32 );
- SAVEFREEPV(minnextp);
-
- if (data) {
- StructCopy(data, &data_fake, scan_data_t);
- if ((flags & SCF_DO_SUBSTR) && data->last_found) {
- f |= SCF_DO_SUBSTR;
- if (scan->flags)
- SCAN_COMMIT(pRExC_state, &data_fake,minlenp);
- data_fake.last_found=newSVsv(data->last_found);
- }
- }
- else
- data_fake.last_closep = &fake;
- data_fake.flags = 0;
- data_fake.pos_delta = delta;
- if (is_inf)
- data_fake.flags |= SF_IS_INF;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
-
- *minnextp = study_chunk(pRExC_state, &nscan, minnextp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f,depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (*minnextp > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)*minnextp;
- }
-
- *minnextp += min;
-
- if (f & SCF_DO_STCLASS_AND) {
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- if ((flags & SCF_DO_SUBSTR) && data_fake.last_found) {
- if (RExC_rx->minlen<*minnextp)
- RExC_rx->minlen=*minnextp;
- SCAN_COMMIT(pRExC_state, &data_fake, minnextp);
- SvREFCNT_dec(data_fake.last_found);
-
- if ( data_fake.minlen_fixed != minlenp )
- {
- data->offset_fixed= data_fake.offset_fixed;
- data->minlen_fixed= data_fake.minlen_fixed;
- data->lookbehind_fixed+= scan->flags;
- }
- if ( data_fake.minlen_float != minlenp )
- {
- data->minlen_float= data_fake.minlen_float;
- data->offset_float_min=data_fake.offset_float_min;
- data->offset_float_max=data_fake.offset_float_max;
- data->lookbehind_float+= scan->flags;
- }
- }
- }
-
-
- }
-#endif
- }
- else if (OP(scan) == OPEN) {
- if (stopparen != (I32)ARG(scan))
- pars++;
- }
- else if (OP(scan) == CLOSE) {
- if (stopparen == (I32)ARG(scan)) {
- break;
- }
- if ((I32)ARG(scan) == is_par) {
- next = regnext(scan);
-
- if ( next && (OP(next) != WHILEM) && next < last)
- is_par = 0; /* Disable optimization */
- }
- if (data)
- *(data->last_closep) = ARG(scan);
- }
- else if (OP(scan) == EVAL) {
- if (data)
- data->flags |= SF_HAS_EVAL;
- }
- else if ( PL_regkind[OP(scan)] == ENDLIKE ) {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- flags &= ~SCF_DO_SUBSTR;
- }
- if (data && OP(scan)==ACCEPT) {
- data->flags |= SCF_SEEN_ACCEPT;
- if (stopmin > min)
- stopmin = min;
- }
- }
- else if (OP(scan) == LOGICAL && scan->flags == 2) /* Embedded follows */
- {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- else if (OP(scan) == GPOS) {
- if (!(RExC_rx->extflags & RXf_GPOS_FLOAT) &&
- !(delta || is_inf || (data && data->pos_delta)))
- {
- if (!(RExC_rx->extflags & RXf_ANCH) && (flags & SCF_DO_SUBSTR))
- RExC_rx->extflags |= RXf_ANCH_GPOS;
- if (RExC_rx->gofs < (U32)min)
- RExC_rx->gofs = min;
- } else {
- RExC_rx->extflags |= RXf_GPOS_FLOAT;
- RExC_rx->gofs = 0;
- }
- }
-#ifdef TRIE_STUDY_OPT
-#ifdef FULL_TRIE_STUDY
- else if (PL_regkind[OP(scan)] == TRIE) {
- /* NOTE - There is similar code to this block above for handling
- BRANCH nodes on the initial study. If you change stuff here
- check there too. */
- regnode *trie_node= scan;
- regnode *tail= regnext(scan);
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- I32 max1 = 0, min1 = I32_MAX;
- struct regnode_charclass_class accum;
-
- if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */
- SCAN_COMMIT(pRExC_state, data,minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- if (!trie->jump) {
- min1= trie->minlen;
- max1= trie->maxlen;
- } else {
- const regnode *nextbranch= NULL;
- U32 word;
-
- for ( word=1 ; word <= trie->wordcount ; word++)
- {
- I32 deltanext=0, minnext=0, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- if (trie->jump[word]) {
- if (!nextbranch)
- nextbranch = trie_node + trie->jump[0];
- scan= trie_node + trie->jump[word];
- /* We go from the jump point to the branch that follows
- it. Note this means we need the vestigal unused branches
- even though they arent otherwise used.
- */
- minnext = study_chunk(pRExC_state, &scan, minlenp,
- &deltanext, (regnode *)nextbranch, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode*)nextbranch);
-
- if (min1 > (I32)(minnext + trie->minlen))
- min1 = minnext + trie->minlen;
- if (max1 < (I32)(minnext + deltanext + trie->maxlen))
- max1 = minnext + deltanext + trie->maxlen;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
-
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > min + min1)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- }
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- scan= tail;
- continue;
- }
-#else
- else if (PL_regkind[OP(scan)] == TRIE) {
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- U8*bang=NULL;
-
- min += trie->minlen;
- delta += (trie->maxlen - trie->minlen);
- flags &= ~SCF_DO_STCLASS; /* xxx */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += trie->minlen;
- data->pos_delta += (trie->maxlen - trie->minlen);
- if (trie->maxlen != trie->minlen)
- data->longest = &(data->longest_float);
- }
- if (trie->jump) /* no more substrings -- for now /grr*/
- flags &= ~SCF_DO_SUBSTR;
- }
-#endif /* old or new */
-#endif /* TRIE_STUDY_OPT */
-
- /* Else: zero-length, ignore. */
- scan = regnext(scan);
- }
- if (frame) {
- last = frame->last;
- scan = frame->next;
- stopparen = frame->stop;
- frame = frame->prev;
- goto fake_study_recurse;
- }
-
- finish:
- assert(!frame);
- DEBUG_STUDYDATA("pre-fin:",data,depth);
-
- *scanp = scan;
- *deltap = is_inf_internal ? I32_MAX : delta;
- if (flags & SCF_DO_SUBSTR && is_inf)
- data->pos_delta = I32_MAX - data->pos_min;
- if (is_par > (I32)U8_MAX)
- is_par = 0;
- if (is_par && pars==1 && data) {
- data->flags |= SF_IN_PAR;
- data->flags &= ~SF_HAS_PAR;
- }
- else if (pars && data) {
- data->flags |= SF_HAS_PAR;
- data->flags &= ~SF_IN_PAR;
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- if (flags & SCF_TRIE_RESTUDY)
- data->flags |= SCF_TRIE_RESTUDY;
-
- DEBUG_STUDYDATA("post-fin:",data,depth);
-
- return min < stopmin ? min : stopmin;
-}
-
-STATIC U32
-S_add_data(RExC_state_t *pRExC_state, U32 n, const char *s)
-{
- U32 count = RExC_rxi->data ? RExC_rxi->data->count : 0;
-
- PERL_ARGS_ASSERT_ADD_DATA;
-
- Renewc(RExC_rxi->data,
- sizeof(*RExC_rxi->data) + sizeof(void*) * (count + n - 1),
- char, struct reg_data);
- if(count)
- Renew(RExC_rxi->data->what, count + n, U8);
- else
- Newx(RExC_rxi->data->what, n, U8);
- RExC_rxi->data->count = count + n;
- Copy(s, RExC_rxi->data->what + count, n, U8);
- return count;
-}
-
-/*XXX: todo make this not included in a non debugging perl */
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_reginitcolors(pTHX)
-{
- dVAR;
- const char * const s = PerlEnv_getenv("PERL_RE_COLORS");
- if (s) {
- char *t = savepv(s);
- int i = 0;
- PL_colors[0] = t;
- while (++i < 6) {
- t = strchr(t, '\t');
- if (t) {
- *t = '\0';
- PL_colors[i] = ++t;
- }
- else
- PL_colors[i] = t = (char *)"";
- }
- } else {
- int i = 0;
- while (i < 6)
- PL_colors[i++] = (char *)"";
- }
- PL_colorset = 1;
-}
-#endif
-
-
-#ifdef TRIE_STUDY_OPT
-#define CHECK_RESTUDY_GOTO \
- if ( \
- (data.flags & SCF_TRIE_RESTUDY) \
- && ! restudied++ \
- ) goto reStudy
-#else
-#define CHECK_RESTUDY_GOTO
-#endif
-
-/*
- - pregcomp - compile a regular expression into internal code
- *
- * We can't allocate space until we know how big the compiled form will be,
- * but we can't compile it (and thus know how big it is) until we've got a
- * place to put the code. So we cheat: we compile it twice, once with code
- * generation turned off and size counting turned on, and once "for real".
- * This also means that we don't allocate space until we are sure that the
- * thing really will compile successfully, and we never have to move the
- * code and thus invalidate pointers into it. (Note that it has to be in
- * one piece because free() must be able to free it all.) [NB: not true in perl]
- *
- * Beware that the optimization-preparation code in here knows about some
- * of the structure of the compiled regexp. [I'll say.]
- */
-
-
-
-#ifndef PERL_IN_XSUB_RE
-#define RE_ENGINE_PTR &PL_core_reg_engine
-#else
-extern const struct regexp_engine my_reg_engine;
-#define RE_ENGINE_PTR &my_reg_engine
-#endif
-
-#ifndef PERL_IN_XSUB_RE
-REGEXP *
-Perl_pregcomp(pTHX_ SV * const pattern, const U32 flags)
-{
- dVAR;
- HV * const table = GvHV(PL_hintgv);
-
- PERL_ARGS_ASSERT_PREGCOMP;
-
- /* Dispatch a request to compile a regexp to correct
- regexp engine. */
- if (table) {
- SV **ptr= hv_fetchs(table, "regcomp", FALSE);
- GET_RE_DEBUG_FLAGS_DECL;
- if (ptr && SvIOK(*ptr) && SvIV(*ptr)) {
- const regexp_engine *eng=INT2PTR(regexp_engine*,SvIV(*ptr));
- DEBUG_COMPILE_r({
- PerlIO_printf(Perl_debug_log, "Using engine %"UVxf"\n",
- SvIV(*ptr));
- });
- return CALLREGCOMP_ENG(eng, pattern, flags);
- }
- }
- return Perl_re_compile(aTHX_ pattern, flags);
-}
-#endif
-
-REGEXP *
-Perl_re_compile(pTHX_ SV * const pattern, U32 pm_flags)
-{
- dVAR;
- REGEXP *rx;
- struct regexp *r;
- register regexp_internal *ri;
- STRLEN plen;
- char *exp = SvPV(pattern, plen);
- char* xend = exp + plen;
- regnode *scan;
- I32 flags;
- I32 minlen = 0;
- I32 sawplus = 0;
- I32 sawopen = 0;
- scan_data_t data;
- RExC_state_t RExC_state;
- RExC_state_t * const pRExC_state = &RExC_state;
-#ifdef TRIE_STUDY_OPT
- int restudied= 0;
- RExC_state_t copyRExC_state;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_COMPILE;
-
- DEBUG_r(if (!PL_colorset) reginitcolors());
-
- RExC_utf8 = RExC_orig_utf8 = SvUTF8(pattern);
-
- DEBUG_COMPILE_r({
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RExC_utf8,
- dsv, exp, plen, 60);
- PerlIO_printf(Perl_debug_log, "%sCompiling REx%s %s\n",
- PL_colors[4],PL_colors[5],s);
- });
-
-redo_first_pass:
- RExC_precomp = exp;
- RExC_flags = pm_flags;
- RExC_sawback = 0;
-
- RExC_seen = 0;
- RExC_seen_zerolen = *exp == '^' ? -1 : 0;
- RExC_seen_evals = 0;
- RExC_extralen = 0;
-
- /* First pass: determine size, legality. */
- RExC_parse = exp;
- RExC_start = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_nestroot = 0;
- RExC_size = 0L;
- RExC_emit = &PL_regdummy;
- RExC_whilem_seen = 0;
- RExC_charnames = NULL;
- RExC_open_parens = NULL;
- RExC_close_parens = NULL;
- RExC_opend = NULL;
- RExC_paren_names = NULL;
-#ifdef DEBUGGING
- RExC_paren_name_list = NULL;
-#endif
- RExC_recurse = NULL;
- RExC_recurse_count = 0;
-
-#if 0 /* REGC() is (currently) a NOP at the first pass.
- * Clever compilers notice this and complain. --jhi */
- REGC((U8)REG_MAGIC, (char*)RExC_emit);
-#endif
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n"));
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- RExC_precomp = NULL;
- return(NULL);
- }
- if (RExC_utf8 && !RExC_orig_utf8) {
- /* It's possible to write a regexp in ascii that represents Unicode
- codepoints outside of the byte range, such as via \x{100}. If we
- detect such a sequence we have to convert the entire pattern to utf8
- and then recompile, as our sizing calculation will have been based
- on 1 byte == 1 character, but we will need to use utf8 to encode
- at least some part of the pattern, and therefore must convert the whole
- thing.
- XXX: somehow figure out how to make this less expensive...
- -- dmq */
- STRLEN len = plen;
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log,
- "UTF8 mismatch! Converting to utf8 for resizing and compile\n"));
- exp = (char*)Perl_bytes_to_utf8(aTHX_ (U8*)exp, &len);
- xend = exp + len;
- RExC_orig_utf8 = RExC_utf8;
- SAVEFREEPV(exp);
- goto redo_first_pass;
- }
- DEBUG_PARSE_r({
- PerlIO_printf(Perl_debug_log,
- "Required size %"IVdf" nodes\n"
- "Starting second pass (creation)\n",
- (IV)RExC_size);
- RExC_lastnum=0;
- RExC_lastparse=NULL;
- });
- /* Small enough for pointer-storage convention?
- If extralen==0, this means that we will not need long jumps. */
- if (RExC_size >= 0x10000L && RExC_extralen)
- RExC_size += RExC_extralen;
- else
- RExC_extralen = 0;
- if (RExC_whilem_seen > 15)
- RExC_whilem_seen = 15;
-
- /* Allocate space and zero-initialize. Note, the two step process
- of zeroing when in debug mode, thus anything assigned has to
- happen after that */
- rx = (REGEXP*) newSV_type(SVt_REGEXP);
- r = (struct regexp*)SvANY(rx);
- Newxc(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode),
- char, regexp_internal);
- if ( r == NULL || ri == NULL )
- FAIL("Regexp out of space");
-#ifdef DEBUGGING
- /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */
- Zero(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode), char);
-#else
- /* bulk initialize base fields with 0. */
- Zero(ri, sizeof(regexp_internal), char);
-#endif
-
- /* non-zero initialization begins here */
- RXi_SET( r, ri );
- r->engine= RE_ENGINE_PTR;
- r->extflags = pm_flags;
- {
- bool has_p = ((r->extflags & RXf_PMf_KEEPCOPY) == RXf_PMf_KEEPCOPY);
- bool has_minus = ((r->extflags & RXf_PMf_STD_PMMOD) != RXf_PMf_STD_PMMOD);
- bool has_runon = ((RExC_seen & REG_SEEN_RUN_ON_COMMENT)==REG_SEEN_RUN_ON_COMMENT);
- U16 reganch = (U16)((r->extflags & RXf_PMf_STD_PMMOD)
- >> RXf_PMf_STD_PMMOD_SHIFT);
- const char *fptr = STD_PAT_MODS; /*"msix"*/
- char *p;
- const STRLEN wraplen = plen + has_minus + has_p + has_runon
- + (sizeof(STD_PAT_MODS) - 1)
- + (sizeof("(?:)") - 1);
-
- p = sv_grow(MUTABLE_SV(rx), wraplen + 1);
- SvCUR_set(rx, wraplen);
- SvPOK_on(rx);
- SvFLAGS(rx) |= SvUTF8(pattern);
- *p++='('; *p++='?';
- if (has_p)
- *p++ = KEEPCOPY_PAT_MOD; /*'p'*/
- {
- char *r = p + (sizeof(STD_PAT_MODS) - 1) + has_minus - 1;
- char *colon = r + 1;
- char ch;
-
- while((ch = *fptr++)) {
- if(reganch & 1)
- *p++ = ch;
- else
- *r-- = ch;
- reganch >>= 1;
- }
- if(has_minus) {
- *r = '-';
- p = colon;
- }
- }
-
- *p++ = ':';
- Copy(RExC_precomp, p, plen, char);
- assert ((RX_WRAPPED(rx) - p) < 16);
- r->pre_prefix = p - RX_WRAPPED(rx);
- p += plen;
- if (has_runon)
- *p++ = '\n';
- *p++ = ')';
- *p = 0;
- }
-
- r->intflags = 0;
- r->nparens = RExC_npar - 1; /* set early to validate backrefs */
-
- if (RExC_seen & REG_SEEN_RECURSE) {
- Newxz(RExC_open_parens, RExC_npar,regnode *);
- SAVEFREEPV(RExC_open_parens);
- Newxz(RExC_close_parens,RExC_npar,regnode *);
- SAVEFREEPV(RExC_close_parens);
- }
-
- /* Useful during FAIL. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- Newxz(ri->u.offsets, 2*RExC_size+1, U32); /* MJD 20001228 */
- DEBUG_OFFSETS_r(PerlIO_printf(Perl_debug_log,
- "%s %"UVuf" bytes for offset annotations.\n",
- ri->u.offsets ? "Got" : "Couldn't get",
- (UV)((2*RExC_size+1) * sizeof(U32))));
-#endif
- SetProgLen(ri,RExC_size);
- RExC_rx_sv = rx;
- RExC_rx = r;
- RExC_rxi = ri;
-
- /* Second pass: emit code. */
- RExC_flags = pm_flags; /* don't let top level (?i) bleed */
- RExC_parse = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_emit_start = ri->program;
- RExC_emit = ri->program;
- RExC_emit_bound = ri->program + RExC_size + 1;
-
- /* Store the count of eval-groups for security checks: */
- RExC_rx->seen_evals = RExC_seen_evals;
- REGC((U8)REG_MAGIC, (char*) RExC_emit++);
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- ReREFCNT_dec(rx);
- return(NULL);
- }
- /* XXXX To minimize changes to RE engine we always allocate
- 3-units-long substrs field. */
- Newx(r->substrs, 1, struct reg_substr_data);
- if (RExC_recurse_count) {
- Newxz(RExC_recurse,RExC_recurse_count,regnode *);
- SAVEFREEPV(RExC_recurse);
- }
-
-reStudy:
- r->minlen = minlen = sawplus = sawopen = 0;
- Zero(r->substrs, 1, struct reg_substr_data);
-
-#ifdef TRIE_STUDY_OPT
- if (!restudied) {
- StructCopy(&zero_scan_data, &data, scan_data_t);
- copyRExC_state = RExC_state;
- } else {
- U32 seen=RExC_seen;
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log,"Restudying\n"));
-
- RExC_state = copyRExC_state;
- if (seen & REG_TOP_LEVEL_BRANCHES)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
- else
- RExC_seen &= ~REG_TOP_LEVEL_BRANCHES;
- if (data.last_found) {
- SvREFCNT_dec(data.longest_fixed);
- SvREFCNT_dec(data.longest_float);
- SvREFCNT_dec(data.last_found);
- }
- StructCopy(&zero_scan_data, &data, scan_data_t);
- }
-#else
- StructCopy(&zero_scan_data, &data, scan_data_t);
-#endif
-
- /* Dig out information for optimizations. */
- r->extflags = RExC_flags; /* was pm_op */
- /*dmq: removed as part of de-PMOP: pm->op_pmflags = RExC_flags; */
-
- if (UTF)
- SvUTF8_on(rx); /* Unicode in it? */
- ri->regstclass = NULL;
- if (RExC_naughty >= 10) /* Probably an expensive pattern. */
- r->intflags |= PREGf_NAUGHTY;
- scan = ri->program + 1; /* First BRANCH. */
-
- /* testing for BRANCH here tells us whether there is "must appear"
- data in the pattern. If there is then we can use it for optimisations */
- if (!(RExC_seen & REG_TOP_LEVEL_BRANCHES)) { /* Only one top-level choice. */
- I32 fake;
- STRLEN longest_float_length, longest_fixed_length;
- struct regnode_charclass_class ch_class; /* pointed to by data */
- int stclass_flag;
- I32 last_close = 0; /* pointed to by data */
- regnode *first= scan;
- regnode *first_next= regnext(first);
-
- /*
- * Skip introductions and multiplicators >= 1
- * so that we can extract the 'meat' of the pattern that must
- * match in the large if() sequence following.
- * NOTE that EXACT is NOT covered here, as it is normally
- * picked up by the optimiser separately.
- *
- * This is unfortunate as the optimiser isnt handling lookahead
- * properly currently.
- *
- */
- while ((OP(first) == OPEN && (sawopen = 1)) ||
- /* An OR of *one* alternative - should not happen now. */
- (OP(first) == BRANCH && OP(first_next) != BRANCH) ||
- /* for now we can't handle lookbehind IFMATCH*/
- (OP(first) == IFMATCH && !first->flags) ||
- (OP(first) == PLUS) ||
- (OP(first) == MINMOD) ||
- /* An {n,m} with n>0 */
- (PL_regkind[OP(first)] == CURLY && ARG1(first) > 0) ||
- (OP(first) == NOTHING && PL_regkind[OP(first_next)] != END ))
- {
- /*
- * the only op that could be a regnode is PLUS, all the rest
- * will be regnode_1 or regnode_2.
- *
- */
- if (OP(first) == PLUS)
- sawplus = 1;
- else
- first += regarglen[OP(first)];
-
- first = NEXTOPER(first);
- first_next= regnext(first);
- }
-
- /* Starting-point info. */
- again:
- DEBUG_PEEP("first:",first,0);
- /* Ignore EXACT as we deal with it later. */
- if (PL_regkind[OP(first)] == EXACT) {
- if (OP(first) == EXACT)
- NOOP; /* Empty, get anchored substr later. */
- else if ((OP(first) == EXACTF || OP(first) == EXACTFL))
- ri->regstclass = first;
- }
-#ifdef TRIE_STCLASS
- else if (PL_regkind[OP(first)] == TRIE &&
- ((reg_trie_data *)ri->data->data[ ARG(first) ])->minlen>0)
- {
- regnode *trie_op;
- /* this can happen only on restudy */
- if ( OP(first) == TRIE ) {
- struct regnode_1 *trieop = (struct regnode_1 *)
- PerlMemShared_calloc(1, sizeof(struct regnode_1));
- StructCopy(first,trieop,struct regnode_1);
- trie_op=(regnode *)trieop;
- } else {
- struct regnode_charclass *trieop = (struct regnode_charclass *)
- PerlMemShared_calloc(1, sizeof(struct regnode_charclass));
- StructCopy(first,trieop,struct regnode_charclass);
- trie_op=(regnode *)trieop;
- }
- OP(trie_op)+=2;
- make_trie_failtable(pRExC_state, (regnode *)first, trie_op, 0);
- ri->regstclass = trie_op;
- }
-#endif
- else if (strchr((const char*)PL_simple,OP(first)))
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOUND ||
- PL_regkind[OP(first)] == NBOUND)
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOL) {
- r->extflags |= (OP(first) == MBOL
- ? RXf_ANCH_MBOL
- : (OP(first) == SBOL
- ? RXf_ANCH_SBOL
- : RXf_ANCH_BOL));
- first = NEXTOPER(first);
- goto again;
- }
- else if (OP(first) == GPOS) {
- r->extflags |= RXf_ANCH_GPOS;
- first = NEXTOPER(first);
- goto again;
- }
- else if ((!sawopen || !RExC_sawback) &&
- (OP(first) == STAR &&
- PL_regkind[OP(NEXTOPER(first))] == REG_ANY) &&
- !(r->extflags & RXf_ANCH) && !(RExC_seen & REG_SEEN_EVAL))
- {
- /* turn .* into ^.* with an implied $*=1 */
- const int type =
- (OP(NEXTOPER(first)) == REG_ANY)
- ? RXf_ANCH_MBOL
- : RXf_ANCH_SBOL;
- r->extflags |= type;
- r->intflags |= PREGf_IMPLICIT;
- first = NEXTOPER(first);
- goto again;
- }
- if (sawplus && (!sawopen || !RExC_sawback)
- && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */
- /* x+ must match at the 1st pos of run of x's */
- r->intflags |= PREGf_SKIP;
-
- /* Scan is after the zeroth branch, first is atomic matcher. */
-#ifdef TRIE_STUDY_OPT
- DEBUG_PARSE_r(
- if (!restudied)
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#else
- DEBUG_PARSE_r(
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#endif
-
-
- /*
- * If there's something expensive in the r.e., find the
- * longest literal string that must appear and make it the
- * regmust. Resolve ties in favor of later strings, since
- * the regstart check works with the beginning of the r.e.
- * and avoiding duplication strengthens checking. Not a
- * strong reason, but sufficient in the absence of others.
- * [Now we resolve ties in favor of the earlier string if
- * it happens that c_offset_min has been invalidated, since the
- * earlier string may buy us something the later one won't.]
- */
-
- data.longest_fixed = newSVpvs("");
- data.longest_float = newSVpvs("");
- data.last_found = newSVpvs("");
- data.longest = &(data.longest_fixed);
- first = scan;
- if (!ri->regstclass) {
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- stclass_flag = SCF_DO_STCLASS_AND;
- } else /* XXXX Check for BOUND? */
- stclass_flag = 0;
- data.last_closep = &last_close;
-
- minlen = study_chunk(pRExC_state, &first, &minlen, &fake, scan + RExC_size, /* Up to end */
- &data, -1, NULL, NULL,
- SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag,0);
-
-
- CHECK_RESTUDY_GOTO;
-
-
- if ( RExC_npar == 1 && data.longest == &(data.longest_fixed)
- && data.last_start_min == 0 && data.last_end > 0
- && !RExC_seen_zerolen
- && !(RExC_seen & REG_SEEN_VERBARG)
- && (!(RExC_seen & REG_SEEN_GPOS) || (r->extflags & RXf_ANCH_GPOS)))
- r->extflags |= RXf_CHECK_ALL;
- scan_commit(pRExC_state, &data,&minlen,0);
- SvREFCNT_dec(data.last_found);
-
- /* Note that code very similar to this but for anchored string
- follows immediately below, changes may need to be made to both.
- Be careful.
- */
- longest_float_length = CHR_SVLEN(data.longest_float);
- if (longest_float_length
- || (data.flags & SF_FL_BEFORE_EOL
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */
- && data.offset_fixed == data.offset_float_min
- && SvCUR(data.longest_fixed) == SvCUR(data.longest_float))
- goto remove_float; /* As in (a)+. */
-
- /* copy the information about the longest float from the reg_scan_data
- over to the program. */
- if (SvUTF8(data.longest_float)) {
- r->float_utf8 = data.longest_float;
- r->float_substr = NULL;
- } else {
- r->float_substr = data.longest_float;
- r->float_utf8 = NULL;
- }
- /* float_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_float ? *(data.minlen_float)
- : (I32)longest_float_length;
- r->float_end_shift = ml - data.offset_float_min
- - longest_float_length + (SvTAIL(data.longest_float) != 0)
- + data.lookbehind_float;
- r->float_min_offset = data.offset_float_min - data.lookbehind_float;
- r->float_max_offset = data.offset_float_max;
- if (data.offset_float_max < I32_MAX) /* Don't offset infinity */
- r->float_max_offset -= data.lookbehind_float;
-
- t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_float, t ? FBMcf_TAIL : 0);
- }
- else {
- remove_float:
- r->float_substr = r->float_utf8 = NULL;
- SvREFCNT_dec(data.longest_float);
- longest_float_length = 0;
- }
-
- /* Note that code very similar to this but for floating string
- is immediately above, changes may need to be made to both.
- Be careful.
- */
- longest_fixed_length = CHR_SVLEN(data.longest_fixed);
- if (longest_fixed_length
- || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- /* copy the information about the longest fixed
- from the reg_scan_data over to the program. */
- if (SvUTF8(data.longest_fixed)) {
- r->anchored_utf8 = data.longest_fixed;
- r->anchored_substr = NULL;
- } else {
- r->anchored_substr = data.longest_fixed;
- r->anchored_utf8 = NULL;
- }
- /* fixed_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_fixed ? *(data.minlen_fixed)
- : (I32)longest_fixed_length;
- r->anchored_end_shift = ml - data.offset_fixed
- - longest_fixed_length + (SvTAIL(data.longest_fixed) != 0)
- + data.lookbehind_fixed;
- r->anchored_offset = data.offset_fixed - data.lookbehind_fixed;
-
- t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_fixed, t ? FBMcf_TAIL : 0);
- }
- else {
- r->anchored_substr = r->anchored_utf8 = NULL;
- SvREFCNT_dec(data.longest_fixed);
- longest_fixed_length = 0;
- }
- if (ri->regstclass
- && (OP(ri->regstclass) == REG_ANY || OP(ri->regstclass) == SANY))
- ri->regstclass = NULL;
- if ((!(r->anchored_substr || r->anchored_utf8) || r->anchored_offset)
- && stclass_flag
- && !(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV *sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
-
- /* A temporary algorithm prefers floated substr to fixed one to dig more info. */
- if (longest_fixed_length > longest_float_length) {
- r->check_end_shift = r->anchored_end_shift;
- r->check_substr = r->anchored_substr;
- r->check_utf8 = r->anchored_utf8;
- r->check_offset_min = r->check_offset_max = r->anchored_offset;
- if (r->extflags & RXf_ANCH_SINGLE)
- r->extflags |= RXf_NOSCAN;
- }
- else {
- r->check_end_shift = r->float_end_shift;
- r->check_substr = r->float_substr;
- r->check_utf8 = r->float_utf8;
- r->check_offset_min = r->float_min_offset;
- r->check_offset_max = r->float_max_offset;
- }
- /* XXXX Currently intuiting is not compatible with ANCH_GPOS.
- This should be changed ASAP! */
- if ((r->check_substr || r->check_utf8) && !(r->extflags & RXf_ANCH_GPOS)) {
- r->extflags |= RXf_USE_INTUIT;
- if (SvTAIL(r->check_substr ? r->check_substr : r->check_utf8))
- r->extflags |= RXf_INTUIT_TAIL;
- }
- /* XXX Unneeded? dmq (shouldn't as this is handled elsewhere)
- if ( (STRLEN)minlen < longest_float_length )
- minlen= longest_float_length;
- if ( (STRLEN)minlen < longest_fixed_length )
- minlen= longest_fixed_length;
- */
- }
- else {
- /* Several toplevels. Best we can is to set minlen. */
- I32 fake;
- struct regnode_charclass_class ch_class;
- I32 last_close = 0;
-
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "\nMulti Top Level\n"));
-
- scan = ri->program + 1;
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- data.last_closep = &last_close;
-
-
- minlen = study_chunk(pRExC_state, &scan, &minlen, &fake, scan + RExC_size,
- &data, -1, NULL, NULL, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS,0);
-
- CHECK_RESTUDY_GOTO;
-
- r->check_substr = r->check_utf8 = r->anchored_substr = r->anchored_utf8
- = r->float_substr = r->float_utf8 = NULL;
- if (!(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV* sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
- }
-
- /* Guard against an embedded (?=) or (?<=) with a longer minlen than
- the "real" pattern. */
- DEBUG_OPTIMISE_r({
- PerlIO_printf(Perl_debug_log,"minlen: %"IVdf" r->minlen:%"IVdf"\n",
- (IV)minlen, (IV)r->minlen);
- });
- r->minlenret = minlen;
- if (r->minlen < minlen)
- r->minlen = minlen;
-
- if (RExC_seen & REG_SEEN_GPOS)
- r->extflags |= RXf_GPOS_SEEN;
- if (RExC_seen & REG_SEEN_LOOKBEHIND)
- r->extflags |= RXf_LOOKBEHIND_SEEN;
- if (RExC_seen & REG_SEEN_EVAL)
- r->extflags |= RXf_EVAL_SEEN;
- if (RExC_seen & REG_SEEN_CANY)
- r->extflags |= RXf_CANY_SEEN;
- if (RExC_seen & REG_SEEN_VERBARG)
- r->intflags |= PREGf_VERBARG_SEEN;
- if (RExC_seen & REG_SEEN_CUTGROUP)
- r->intflags |= PREGf_CUTGROUP_SEEN;
- if (RExC_paren_names)
- RXp_PAREN_NAMES(r) = MUTABLE_HV(SvREFCNT_inc(RExC_paren_names));
- else
- RXp_PAREN_NAMES(r) = NULL;
-
-#ifdef STUPID_PATTERN_CHECKS
- if (RX_PRELEN(rx) == 0)
- r->extflags |= RXf_NULL;
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else if (RX_PRELEN(rx) == 3 && memEQ("\\s+", RX_PRECOMP(rx), 3))
- r->extflags |= RXf_WHITE;
- else if (RX_PRELEN(rx) == 1 && RXp_PRECOMP(rx)[0] == '^')
- r->extflags |= RXf_START_ONLY;
-#else
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else {
- regnode *first = ri->program + 1;
- U8 fop = OP(first);
- U8 nop = OP(NEXTOPER(first));
-
- if (PL_regkind[fop] == NOTHING && nop == END)
- r->extflags |= RXf_NULL;
- else if (PL_regkind[fop] == BOL && nop == END)
- r->extflags |= RXf_START_ONLY;
- else if (fop == PLUS && nop ==SPACE && OP(regnext(first))==END)
- r->extflags |= RXf_WHITE;
- }
-#endif
-#ifdef DEBUGGING
- if (RExC_paren_names) {
- ri->name_list_idx = add_data( pRExC_state, 1, "p" );
- ri->data->data[ri->name_list_idx] = (void*)SvREFCNT_inc(RExC_paren_name_list);
- } else
-#endif
- ri->name_list_idx = 0;
-
- if (RExC_recurse_count) {
- for ( ; RExC_recurse_count ; RExC_recurse_count-- ) {
- const regnode *scan = RExC_recurse[RExC_recurse_count-1];
- ARG2L_SET( scan, RExC_open_parens[ARG(scan)-1] - scan );
- }
- }
- Newxz(r->offs, RExC_npar, regexp_paren_pair);
- /* assume we don't need to swap parens around before we match */
-
- DEBUG_DUMP_r({
- PerlIO_printf(Perl_debug_log,"Final program:\n");
- regdump(r);
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_OFFSETS_r(if (ri->u.offsets) {
- const U32 len = ri->u.offsets[0];
- U32 i;
- GET_RE_DEBUG_FLAGS_DECL;
- PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)ri->u.offsets[0]);
- for (i = 1; i <= len; i++) {
- if (ri->u.offsets[i*2-1] || ri->u.offsets[i*2])
- PerlIO_printf(Perl_debug_log, "%"UVuf":%"UVuf"[%"UVuf"] ",
- (UV)i, (UV)ri->u.offsets[i*2-1], (UV)ri->u.offsets[i*2]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
-#endif
- return rx;
-}
-
-#undef RE_ENGINE_PTR
-
-
-SV*
-Perl_reg_named_buff(pTHX_ REGEXP * const rx, SV * const key, SV * const value,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF;
-
- PERL_UNUSED_ARG(value);
-
- if (flags & RXapif_FETCH) {
- return reg_named_buff_fetch(rx, key, flags);
- } else if (flags & (RXapif_STORE | RXapif_DELETE | RXapif_CLEAR)) {
- Perl_croak(aTHX_ "%s", PL_no_modify);
- return NULL;
- } else if (flags & RXapif_EXISTS) {
- return reg_named_buff_exists(rx, key, flags)
- ? &PL_sv_yes
- : &PL_sv_no;
- } else if (flags & RXapif_REGNAMES) {
- return reg_named_buff_all(rx, flags);
- } else if (flags & (RXapif_SCALAR | RXapif_REGNAMES_COUNT)) {
- return reg_named_buff_scalar(rx, flags);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_iter(pTHX_ REGEXP * const rx, const SV * const lastkey,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ITER;
- PERL_UNUSED_ARG(lastkey);
-
- if (flags & RXapif_FIRSTKEY)
- return reg_named_buff_firstkey(rx, flags);
- else if (flags & RXapif_NEXTKEY)
- return reg_named_buff_nextkey(rx, flags);
- else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_iter", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_fetch(pTHX_ REGEXP * const r, SV * const namesv,
- const U32 flags)
-{
- AV *retarray = NULL;
- SV *ret;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FETCH;
-
- if (flags & RXapif_ALL)
- retarray=newAV();
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HE *he_str = hv_fetch_ent( RXp_PAREN_NAMES(rx), namesv, 0, 0 );
- if (he_str) {
- IV i;
- SV* sv_dat=HeVAL(he_str);
- I32 *nums=(I32*)SvPVX(sv_dat);
- for ( i=0; i<SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->nparens) >= nums[i]
- && rx->offs[nums[i]].start != -1
- && rx->offs[nums[i]].end != -1)
- {
- ret = newSVpvs("");
- CALLREG_NUMBUF_FETCH(r,nums[i],ret);
- if (!retarray)
- return ret;
- } else {
- ret = newSVsv(&PL_sv_undef);
- }
- if (retarray)
- av_push(retarray, ret);
- }
- if (retarray)
- return newRV_noinc(MUTABLE_SV(retarray));
- }
- }
- return NULL;
-}
-
-bool
-Perl_reg_named_buff_exists(pTHX_ REGEXP * const r, SV * const key,
- const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_EXISTS;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & RXapif_ALL) {
- return hv_exists_ent(RXp_PAREN_NAMES(rx), key, 0);
- } else {
- SV *sv = CALLREG_NAMED_BUFF_FETCH(r, key, flags);
- if (sv) {
- SvREFCNT_dec(sv);
- return TRUE;
- } else {
- return FALSE;
- }
- }
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_firstkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FIRSTKEY;
-
- if ( rx && RXp_PAREN_NAMES(rx) ) {
- (void)hv_iterinit(RXp_PAREN_NAMES(rx));
-
- return CALLREG_NAMED_BUFF_NEXTKEY(r, NULL, flags & ~RXapif_FIRSTKEY);
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_nextkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_NEXTKEY;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv = RXp_PAREN_NAMES(rx);
- HE *temphe;
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- return newSVhek(HeKEY_hek(temphe));
- }
- }
- }
- return NULL;
-}
-
-SV*
-Perl_reg_named_buff_scalar(pTHX_ REGEXP * const r, const U32 flags)
-{
- SV *ret;
- AV *av;
- I32 length;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_SCALAR;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & (RXapif_ALL | RXapif_REGNAMES_COUNT)) {
- return newSViv(HvTOTALKEYS(RXp_PAREN_NAMES(rx)));
- } else if (flags & RXapif_ONE) {
- ret = CALLREG_NAMED_BUFF_ALL(r, (flags | RXapif_REGNAMES));
- av = MUTABLE_AV(SvRV(ret));
- length = av_len(av);
- SvREFCNT_dec(ret);
- return newSViv(length + 1);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_scalar", (int)flags);
- return NULL;
- }
- }
- return &PL_sv_undef;
-}
-
-SV*
-Perl_reg_named_buff_all(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- AV *av = newAV();
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ALL;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv= RXp_PAREN_NAMES(rx);
- HE *temphe;
- (void)hv_iterinit(hv);
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- av_push(av, newSVhek(HeKEY_hek(temphe)));
- }
- }
- }
-
- return newRV_noinc(MUTABLE_SV(av));
-}
-
-void
-Perl_reg_numbered_buff_fetch(pTHX_ REGEXP * const r, const I32 paren,
- SV * const sv)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- char *s = NULL;
- I32 i = 0;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_FETCH;
-
- if (!rx->subbeg) {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- else
- if (paren == RX_BUFF_IDX_PREMATCH && rx->offs[0].start != -1) {
- /* $` */
- i = rx->offs[0].start;
- s = rx->subbeg;
- }
- else
- if (paren == RX_BUFF_IDX_POSTMATCH && rx->offs[0].end != -1) {
- /* $' */
- s = rx->subbeg + rx->offs[0].end;
- i = rx->sublen - rx->offs[0].end;
- }
- else
- if ( 0 <= paren && paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- /* $& $1 ... */
- i = t1 - s1;
- s = rx->subbeg + s1;
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- assert(rx->sublen >= (s - rx->subbeg) + i );
- if (i >= 0) {
- const int oldtainted = PL_tainted;
- TAINT_NOT;
- sv_setpvn(sv, s, i);
- PL_tainted = oldtainted;
- if ( (rx->extflags & RXf_CANY_SEEN)
- ? (RXp_MATCH_UTF8(rx)
- && (!i || is_utf8_string((U8*)s, i)))
- : (RXp_MATCH_UTF8(rx)) )
- {
- SvUTF8_on(sv);
- }
- else
- SvUTF8_off(sv);
- if (PL_tainting) {
- if (RXp_MATCH_TAINTED(rx)) {
- if (SvTYPE(sv) >= SVt_PVMG) {
- MAGIC* const mg = SvMAGIC(sv);
- MAGIC* mgt;
- PL_tainted = 1;
- SvMAGIC_set(sv, mg->mg_moremagic);
- SvTAINT(sv);
- if ((mgt = SvMAGIC(sv))) {
- mg->mg_moremagic = mgt;
- SvMAGIC_set(sv, mg);
- }
- } else {
- PL_tainted = 1;
- SvTAINT(sv);
- }
- } else
- SvTAINTED_off(sv);
- }
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
-}
-
-void
-Perl_reg_numbered_buff_store(pTHX_ REGEXP * const rx, const I32 paren,
- SV const * const value)
-{
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_STORE;
-
- PERL_UNUSED_ARG(rx);
- PERL_UNUSED_ARG(paren);
- PERL_UNUSED_ARG(value);
-
- if (!PL_localizing)
- Perl_croak(aTHX_ "%s", PL_no_modify);
-}
-
-I32
-Perl_reg_numbered_buff_length(pTHX_ REGEXP * const r, const SV * const sv,
- const I32 paren)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- I32 i;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_LENGTH;
-
- /* Some of this code was originally in C<Perl_magic_len> in F<mg.c> */
- switch (paren) {
- /* $` / ${^PREMATCH} */
- case RX_BUFF_IDX_PREMATCH:
- if (rx->offs[0].start != -1) {
- i = rx->offs[0].start;
- if (i > 0) {
- s1 = 0;
- t1 = i;
- goto getlen;
- }
- }
- return 0;
- /* $' / ${^POSTMATCH} */
- case RX_BUFF_IDX_POSTMATCH:
- if (rx->offs[0].end != -1) {
- i = rx->sublen - rx->offs[0].end;
- if (i > 0) {
- s1 = rx->offs[0].end;
- t1 = rx->sublen;
- goto getlen;
- }
- }
- return 0;
- /* $& / ${^MATCH}, $1, $2, ... */
- default:
- if (paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- i = t1 - s1;
- goto getlen;
- } else {
- if (ckWARN(WARN_UNINITIALIZED))
- report_uninit((const SV *)sv);
- return 0;
- }
- }
- getlen:
- if (i > 0 && RXp_MATCH_UTF8(rx)) {
- const char * const s = rx->subbeg + s1;
- const U8 *ep;
- STRLEN el;
-
- i = t1 - s1;
- if (is_utf8_string_loclen((U8*)s, i, &ep, &el))
- i = el;
- }
- return i;
-}
-
-SV*
-Perl_reg_qr_package(pTHX_ REGEXP * const rx)
-{
- PERL_ARGS_ASSERT_REG_QR_PACKAGE;
- PERL_UNUSED_ARG(rx);
- if (0)
- return NULL;
- else
- return newSVpvs("Regexp");
-}
-
-/* Scans the name of a named buffer from the pattern.
- * If flags is REG_RSN_RETURN_NULL returns null.
- * If flags is REG_RSN_RETURN_NAME returns an SV* containing the name
- * If flags is REG_RSN_RETURN_DATA returns the data SV* corresponding
- * to the parsed name as looked up in the RExC_paren_names hash.
- * If there is an error throws a vFAIL().. type exception.
- */
-
-#define REG_RSN_RETURN_NULL 0
-#define REG_RSN_RETURN_NAME 1
-#define REG_RSN_RETURN_DATA 2
-
-STATIC SV*
-S_reg_scan_name(pTHX_ RExC_state_t *pRExC_state, U32 flags)
-{
- char *name_start = RExC_parse;
-
- PERL_ARGS_ASSERT_REG_SCAN_NAME;
-
- if (isIDFIRST_lazy_if(RExC_parse, UTF)) {
- /* skip IDFIRST by using do...while */
- if (UTF)
- do {
- RExC_parse += UTF8SKIP(RExC_parse);
- } while (isALNUM_utf8((U8*)RExC_parse));
- else
- do {
- RExC_parse++;
- } while (isALNUM(*RExC_parse));
- }
-
- if ( flags ) {
- SV* sv_name
- = newSVpvn_flags(name_start, (int)(RExC_parse - name_start),
- SVs_TEMP | (UTF ? SVf_UTF8 : 0));
- if ( flags == REG_RSN_RETURN_NAME)
- return sv_name;
- else if (flags==REG_RSN_RETURN_DATA) {
- HE *he_str = NULL;
- SV *sv_dat = NULL;
- if ( ! sv_name ) /* should not happen*/
- Perl_croak(aTHX_ "panic: no svname in reg_scan_name");
- if (RExC_paren_names)
- he_str = hv_fetch_ent( RExC_paren_names, sv_name, 0, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat )
- vFAIL("Reference to nonexistent named group");
- return sv_dat;
- }
- else {
- Perl_croak(aTHX_ "panic: bad flag in reg_scan_name");
- }
- /* NOT REACHED */
- }
- return NULL;
-}
-
-#define DEBUG_PARSE_MSG(funcname) DEBUG_PARSE_r({ \
- int rem=(int)(RExC_end - RExC_parse); \
- int cut; \
- int num; \
- int iscut=0; \
- if (rem>10) { \
- rem=10; \
- iscut=1; \
- } \
- cut=10-rem; \
- if (RExC_lastparse!=RExC_parse) \
- PerlIO_printf(Perl_debug_log," >%.*s%-*s", \
- rem, RExC_parse, \
- cut + 4, \
- iscut ? "..." : "<" \
- ); \
- else \
- PerlIO_printf(Perl_debug_log,"%16s",""); \
- \
- if (SIZE_ONLY) \
- num = RExC_size + 1; \
- else \
- num=REG_NODE_NUM(RExC_emit); \
- if (RExC_lastnum!=num) \
- PerlIO_printf(Perl_debug_log,"|%4d",num); \
- else \
- PerlIO_printf(Perl_debug_log,"|%4s",""); \
- PerlIO_printf(Perl_debug_log,"|%*s%-4s", \
- (int)((depth*2)), "", \
- (funcname) \
- ); \
- RExC_lastnum=num; \
- RExC_lastparse=RExC_parse; \
-})
-
-
-
-#define DEBUG_PARSE(funcname) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,"%4s","\n"); \
-})
-#define DEBUG_PARSE_FMT(funcname,fmt,args) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,fmt "\n",args); \
-})
-/*
- - reg - regular expression, i.e. main body or parenthesized thing
- *
- * Caller must absorb opening parenthesis.
- *
- * Combining parenthesis handling with the base level of regular expression
- * is a trifle forced, but the need to tie the tails of the branches to what
- * follows makes it hard to avoid.
- */
-#define REGTAIL(x,y,z) regtail((x),(y),(z),depth+1)
-#ifdef DEBUGGING
-#define REGTAIL_STUDY(x,y,z) regtail_study((x),(y),(z),depth+1)
-#else
-#define REGTAIL_STUDY(x,y,z) regtail((x),(y),(z),depth+1)
-#endif
-
-STATIC regnode *
-S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth)
- /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */
-{
- dVAR;
- register regnode *ret; /* Will be the head of the group. */
- register regnode *br;
- register regnode *lastbr;
- register regnode *ender = NULL;
- register I32 parno = 0;
- I32 flags;
- U32 oregflags = RExC_flags;
- bool have_branch = 0;
- bool is_open = 0;
- I32 freeze_paren = 0;
- I32 after_freeze = 0;
-
- /* for (?g), (?gc), and (?o) warnings; warning
- about (?c) will warn about (?g) -- japhy */
-
-#define WASTED_O 0x01
-#define WASTED_G 0x02
-#define WASTED_C 0x04
-#define WASTED_GC (0x02|0x04)
- I32 wastedflags = 0x00;
-
- char * parse_start = RExC_parse; /* MJD */
- char * const oregcomp_parse = RExC_parse;
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG;
- DEBUG_PARSE("reg ");
-
- *flagp = 0; /* Tentatively. */
-
-
- /* Make an OPEN node, if parenthesized. */
- if (paren) {
- if ( *RExC_parse == '*') { /* (*VERB:ARG) */
- char *start_verb = RExC_parse;
- STRLEN verb_len = 0;
- char *start_arg = NULL;
- unsigned char op = 0;
- int argok = 1;
- int internal_argval = 0; /* internal_argval is only useful if !argok */
- while ( *RExC_parse && *RExC_parse != ')' ) {
- if ( *RExC_parse == ':' ) {
- start_arg = RExC_parse + 1;
- break;
- }
- RExC_parse++;
- }
- ++start_verb;
- verb_len = RExC_parse - start_verb;
- if ( start_arg ) {
- RExC_parse++;
- while ( *RExC_parse && *RExC_parse != ')' )
- RExC_parse++;
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern argument");
- if ( RExC_parse == start_arg )
- start_arg = NULL;
- } else {
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern");
- }
-
- switch ( *start_verb ) {
- case 'A': /* (*ACCEPT) */
- if ( memEQs(start_verb,verb_len,"ACCEPT") ) {
- op = ACCEPT;
- internal_argval = RExC_nestroot;
- }
- break;
- case 'C': /* (*COMMIT) */
- if ( memEQs(start_verb,verb_len,"COMMIT") )
- op = COMMIT;
- break;
- case 'F': /* (*FAIL) */
- if ( verb_len==1 || memEQs(start_verb,verb_len,"FAIL") ) {
- op = OPFAIL;
- argok = 0;
- }
- break;
- case ':': /* (*:NAME) */
- case 'M': /* (*MARK:NAME) */
- if ( verb_len==0 || memEQs(start_verb,verb_len,"MARK") ) {
- op = MARKPOINT;
- argok = -1;
- }
- break;
- case 'P': /* (*PRUNE) */
- if ( memEQs(start_verb,verb_len,"PRUNE") )
- op = PRUNE;
- break;
- case 'S': /* (*SKIP) */
- if ( memEQs(start_verb,verb_len,"SKIP") )
- op = SKIP;
- break;
- case 'T': /* (*THEN) */
- /* [19:06] <TimToady> :: is then */
- if ( memEQs(start_verb,verb_len,"THEN") ) {
- op = CUTGROUP;
- RExC_seen |= REG_SEEN_CUTGROUP;
- }
- break;
- }
- if ( ! op ) {
- RExC_parse++;
- vFAIL3("Unknown verb pattern '%.*s'",
- verb_len, start_verb);
- }
- if ( argok ) {
- if ( start_arg && internal_argval ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else if ( argok < 0 && !start_arg ) {
- vFAIL3("Verb pattern '%.*s' has a mandatory argument",
- verb_len, start_verb);
- } else {
- ret = reganode(pRExC_state, op, internal_argval);
- if ( ! internal_argval && ! SIZE_ONLY ) {
- if (start_arg) {
- SV *sv = newSVpvn( start_arg, RExC_parse - start_arg);
- ARG(ret) = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[ARG(ret)]=(void*)sv;
- ret->flags = 0;
- } else {
- ret->flags = 1;
- }
- }
- }
- if (!internal_argval)
- RExC_seen |= REG_SEEN_VERBARG;
- } else if ( start_arg ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else {
- ret = reg_node(pRExC_state, op);
- }
- nextchar(pRExC_state);
- return ret;
- } else
- if (*RExC_parse == '?') { /* (?...) */
- bool is_logical = 0;
- const char * const seqstart = RExC_parse;
-
- RExC_parse++;
- paren = *RExC_parse++;
- ret = NULL; /* For look-ahead/behind. */
- switch (paren) {
-
- case 'P': /* (?P...) variants for those used to PCRE/Python */
- paren = *RExC_parse++;
- if ( paren == '<') /* (?P<...>) named capture */
- goto named_capture;
- else if (paren == '>') { /* (?P>name) named recursion */
- goto named_recursion;
- }
- else if (paren == '=') { /* (?P=...) named backref */
- /* this pretty much dupes the code for \k<NAME> in regatom(), if
- you change this make sure you change that */
- char* name_start = RExC_parse;
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ')')
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
-
- nextchar(pRExC_state);
- return ret;
- }
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- case '<': /* (?<...) */
- if (*RExC_parse == '!')
- paren = ',';
- else if (*RExC_parse != '=')
- named_capture:
- { /* (?<...>) */
- char *name_start;
- SV *svname;
- paren= '>';
- case '\'': /* (?'...') */
- name_start= RExC_parse;
- svname = reg_scan_name(pRExC_state,
- SIZE_ONLY ? /* reverse test from the others */
- REG_RSN_RETURN_NAME :
- REG_RSN_RETURN_NULL);
- if (RExC_parse == name_start) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- if (*RExC_parse != paren)
- vFAIL2("Sequence (?%c... not terminated",
- paren=='>' ? '<' : paren);
- if (SIZE_ONLY) {
- HE *he_str;
- SV *sv_dat = NULL;
- if (!svname) /* shouldnt happen */
- Perl_croak(aTHX_
- "panic: reg_scan_name returned NULL");
- if (!RExC_paren_names) {
- RExC_paren_names= newHV();
- sv_2mortal(MUTABLE_SV(RExC_paren_names));
-#ifdef DEBUGGING
- RExC_paren_name_list= newAV();
- sv_2mortal(MUTABLE_SV(RExC_paren_name_list));
-#endif
- }
- he_str = hv_fetch_ent( RExC_paren_names, svname, 1, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat ) {
- /* croak baby croak */
- Perl_croak(aTHX_
- "panic: paren_name hash element allocation failed");
- } else if ( SvPOK(sv_dat) ) {
- /* (?|...) can mean we have dupes so scan to check
- its already been stored. Maybe a flag indicating
- we are inside such a construct would be useful,
- but the arrays are likely to be quite small, so
- for now we punt -- dmq */
- IV count = SvIV(sv_dat);
- I32 *pv = (I32*)SvPVX(sv_dat);
- IV i;
- for ( i = 0 ; i < count ; i++ ) {
- if ( pv[i] == RExC_npar ) {
- count = 0;
- break;
- }
- }
- if ( count ) {
- pv = (I32*)SvGROW(sv_dat, SvCUR(sv_dat) + sizeof(I32)+1);
- SvCUR_set(sv_dat, SvCUR(sv_dat) + sizeof(I32));
- pv[count] = RExC_npar;
- SvIV_set(sv_dat, SvIVX(sv_dat) + 1);
- }
- } else {
- (void)SvUPGRADE(sv_dat,SVt_PVNV);
- sv_setpvn(sv_dat, (char *)&(RExC_npar), sizeof(I32));
- SvIOK_on(sv_dat);
- SvIV_set(sv_dat, 1);
- }
-#ifdef DEBUGGING
- if (!av_store(RExC_paren_name_list, RExC_npar, SvREFCNT_inc(svname)))
- SvREFCNT_dec(svname);
-#endif
-
- /*sv_dump(sv_dat);*/
- }
- nextchar(pRExC_state);
- paren = 1;
- goto capturing_parens;
- }
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- RExC_parse++;
- case '=': /* (?=...) */
- RExC_seen_zerolen++;
- break;
- case '!': /* (?!...) */
- RExC_seen_zerolen++;
- if (*RExC_parse == ')') {
- ret=reg_node(pRExC_state, OPFAIL);
- nextchar(pRExC_state);
- return ret;
- }
- break;
- case '|': /* (?|...) */
- /* branch reset, behave like a (?:...) except that
- buffers in alternations share the same numbers */
- paren = ':';
- after_freeze = freeze_paren = RExC_npar;
- break;
- case ':': /* (?:...) */
- case '>': /* (?>...) */
- break;
- case '$': /* (?$...) */
- case '@': /* (?@...) */
- vFAIL2("Sequence (?%c...) not implemented", (int)paren);
- break;
- case '#': /* (?#...) */
- while (*RExC_parse && *RExC_parse != ')')
- RExC_parse++;
- if (*RExC_parse != ')')
- FAIL("Sequence (?#... not terminated");
- nextchar(pRExC_state);
- *flagp = TRYAGAIN;
- return NULL;
- case '0' : /* (?0) */
- case 'R' : /* (?R) */
- if (*RExC_parse != ')')
- FAIL("Sequence (?R) not terminated");
- ret = reg_node(pRExC_state, GOSTART);
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- /*notreached*/
- { /* named and numeric backreferences */
- I32 num;
- case '&': /* (?&NAME) */
- parse_start = RExC_parse - 1;
- named_recursion:
- {
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- num = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- goto gen_recurse_regop;
- /* NOT REACHED */
- case '+':
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse++;
- vFAIL("Illegal pattern");
- }
- goto parse_recursion;
- /* NOT REACHED*/
- case '-': /* (?-1) */
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse--; /* rewind to let it be handled later */
- goto parse_flags;
- }
- /*FALLTHROUGH */
- case '1': case '2': case '3': case '4': /* (?1) */
- case '5': case '6': case '7': case '8': case '9':
- RExC_parse--;
- parse_recursion:
- num = atoi(RExC_parse);
- parse_start = RExC_parse - 1; /* MJD */
- if (*RExC_parse == '-')
- RExC_parse++;
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (*RExC_parse!=')')
- vFAIL("Expecting close bracket");
-
- gen_recurse_regop:
- if ( paren == '-' ) {
- /*
- Diagram of capture buffer numbering.
- Top line is the normal capture buffer numbers
- Botton line is the negative indexing as from
- the X (the (?-2))
-
- + 1 2 3 4 5 X 6 7
- /(a(x)y)(a(b(c(?-2)d)e)f)(g(h))/
- - 5 4 3 2 1 X x x
-
- */
- num = RExC_npar + num;
- if (num < 1) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- } else if ( paren == '+' ) {
- num = RExC_npar + num - 1;
- }
-
- ret = reganode(pRExC_state, GOSUB, num);
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- ARG2L_SET( ret, RExC_recurse_count++);
- RExC_emit++;
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Recurse #%"UVuf" to %"IVdf"\n", (UV)ARG(ret), (IV)ARG2L(ret)));
- } else {
- RExC_size++;
- }
- RExC_seen |= REG_SEEN_RECURSE;
- Set_Node_Length(ret, 1 + regarglen[OP(ret)]); /* MJD */
- Set_Node_Offset(ret, parse_start); /* MJD */
-
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- } /* named and numeric backreferences */
- /* NOT REACHED */
-
- case '?': /* (??...) */
- is_logical = 1;
- if (*RExC_parse != '{') {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- *flagp |= POSTPONED;
- paren = *RExC_parse++;
- /* FALL THROUGH */
- case '{': /* (?{...}) */
- {
- I32 count = 1;
- U32 n = 0;
- char c;
- char *s = RExC_parse;
-
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_EVAL;
- while (count && (c = *RExC_parse)) {
- if (c == '\\') {
- if (RExC_parse[1])
- RExC_parse++;
- }
- else if (c == '{')
- count++;
- else if (c == '}')
- count--;
- RExC_parse++;
- }
- if (*RExC_parse != ')') {
- RExC_parse = s;
- vFAIL("Sequence (?{...}) not terminated or not {}-balanced");
- }
- if (!SIZE_ONLY) {
- PAD *pad;
- OP_4tree *sop, *rop;
- SV * const sv = newSVpvn(s, RExC_parse - 1 - s);
-
- ENTER;
- Perl_save_re_context(aTHX);
- rop = sv_compile_2op(sv, &sop, "re", &pad);
- sop->op_private |= OPpREFCOUNTED;
- /* re_dup will OpREFCNT_inc */
- OpREFCNT_set(sop, 1);
- LEAVE;
-
- n = add_data(pRExC_state, 3, "nop");
- RExC_rxi->data->data[n] = (void*)rop;
- RExC_rxi->data->data[n+1] = (void*)sop;
- RExC_rxi->data->data[n+2] = (void*)pad;
- SvREFCNT_dec(sv);
- }
- else { /* First pass */
- if (PL_reginterp_cnt < ++RExC_seen_evals
- && IN_PERL_RUNTIME)
- /* No compiled RE interpolated, has runtime
- components ===> unsafe. */
- FAIL("Eval-group not allowed at runtime, use re 'eval'");
- if (PL_tainting && PL_tainted)
- FAIL("Eval-group in insecure regular expression");
-#if PERL_VERSION > 8
- if (IN_PERL_COMPILETIME)
- PL_cv_has_eval = 1;
-#endif
- }
-
- nextchar(pRExC_state);
- if (is_logical) {
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 2;
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, EVAL, n));
- /* deal with the length of this later - MJD */
- return ret;
- }
- ret = reganode(pRExC_state, EVAL, n);
- Set_Node_Length(ret, RExC_parse - parse_start + 1);
- Set_Node_Offset(ret, parse_start);
- return ret;
- }
- case '(': /* (?(?{...})...) and (?(?=...)...) */
- {
- int is_define= 0;
- if (RExC_parse[0] == '?') { /* (?(?...)) */
- if (RExC_parse[1] == '=' || RExC_parse[1] == '!'
- || RExC_parse[1] == '<'
- || RExC_parse[1] == '{') { /* Lookahead or eval. */
- I32 flag;
-
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 1;
- REGTAIL(pRExC_state, ret, reg(pRExC_state, 1, &flag,depth+1));
- goto insert_if;
- }
- }
- else if ( RExC_parse[0] == '<' /* (?(<NAME>)...) */
- || RExC_parse[0] == '\'' ) /* (?('NAME')...) */
- {
- char ch = RExC_parse[0] == '<' ? '>' : '\'';
- char *name_start= RExC_parse++;
- U32 num = 0;
- SV *sv_dat=reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence (?(%c... not terminated",
- (ch == '>' ? '<' : ch));
- RExC_parse++;
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- ret = reganode(pRExC_state,NGROUPP,num);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'D' &&
- RExC_parse[1] == 'E' &&
- RExC_parse[2] == 'F' &&
- RExC_parse[3] == 'I' &&
- RExC_parse[4] == 'N' &&
- RExC_parse[5] == 'E')
- {
- ret = reganode(pRExC_state,DEFINEP,0);
- RExC_parse +=6 ;
- is_define = 1;
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'R') {
- RExC_parse++;
- parno = 0;
- if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- parno = atoi(RExC_parse++);
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- } else if (RExC_parse[0] == '&') {
- SV *sv_dat;
- RExC_parse++;
- sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- parno = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- ret = reganode(pRExC_state,INSUBP,parno);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- /* (?(1)...) */
- char c;
- parno = atoi(RExC_parse++);
-
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- ret = reganode(pRExC_state, GROUPP, parno);
-
- insert_if_check_paren:
- if ((c = *nextchar(pRExC_state)) != ')')
- vFAIL("Switch condition not recognized");
- insert_if:
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0));
- br = regbranch(pRExC_state, &flags, 1,depth+1);
- if (br == NULL)
- br = reganode(pRExC_state, LONGJMP, 0);
- else
- REGTAIL(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0));
- c = *nextchar(pRExC_state);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- if (c == '|') {
- if (is_define)
- vFAIL("(?(DEFINE)....) does not allow branches");
- lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */
- regbranch(pRExC_state, &flags, 1,depth+1);
- REGTAIL(pRExC_state, ret, lastbr);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- c = *nextchar(pRExC_state);
- }
- else
- lastbr = NULL;
- if (c != ')')
- vFAIL("Switch (?(condition)... contains too many branches");
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, br, ender);
- if (lastbr) {
- REGTAIL(pRExC_state, lastbr, ender);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender);
- }
- else
- REGTAIL(pRExC_state, ret, ender);
- RExC_size++; /* XXX WHY do we need this?!!
- For large programs it seems to be required
- but I can't figure out why. -- dmq*/
- return ret;
- }
- else {
- vFAIL2("Unknown switch condition (?(%.2s", RExC_parse);
- }
- }
- case 0:
- RExC_parse--; /* for vFAIL to print correctly */
- vFAIL("Sequence (? incomplete");
- break;
- default:
- --RExC_parse;
- parse_flags: /* (?i) */
- {
- U32 posflags = 0, negflags = 0;
- U32 *flagsp = &posflags;
-
- while (*RExC_parse) {
- /* && strchr("iogcmsx", *RExC_parse) */
- /* (?g), (?gc) and (?o) are useless here
- and must be globally applied -- japhy */
- switch (*RExC_parse) {
- CASE_STD_PMMOD_FLAGS_PARSE_SET(flagsp);
- case ONCE_PAT_MOD: /* 'o' */
- case GLOBAL_PAT_MOD: /* 'g' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- const I32 wflagbit = *RExC_parse == 'o' ? WASTED_O : WASTED_G;
- if (! (wastedflags & wflagbit) ) {
- wastedflags |= wflagbit;
- vWARN5(
- RExC_parse + 1,
- "Useless (%s%c) - %suse /%c modifier",
- flagsp == &negflags ? "?-" : "?",
- *RExC_parse,
- flagsp == &negflags ? "don't " : "",
- *RExC_parse
- );
- }
- }
- break;
-
- case CONTINUE_PAT_MOD: /* 'c' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- if (! (wastedflags & WASTED_C) ) {
- wastedflags |= WASTED_GC;
- vWARN3(
- RExC_parse + 1,
- "Useless (%sc) - %suse /gc modifier",
- flagsp == &negflags ? "?-" : "?",
- flagsp == &negflags ? "don't " : ""
- );
- }
- }
- break;
- case KEEPCOPY_PAT_MOD: /* 'p' */
- if (flagsp == &negflags) {
- if (SIZE_ONLY)
- ckWARNreg(RExC_parse + 1,"Useless use of (?-p)");
- } else {
- *flagsp |= RXf_PMf_KEEPCOPY;
- }
- break;
- case '-':
- if (flagsp == &negflags) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- flagsp = &negflags;
- wastedflags = 0; /* reset so (?g-c) warns twice */
- break;
- case ':':
- paren = ':';
- /*FALLTHROUGH*/
- case ')':
- RExC_flags |= posflags;
- RExC_flags &= ~negflags;
- if (paren != ':') {
- oregflags |= posflags;
- oregflags &= ~negflags;
- }
- nextchar(pRExC_state);
- if (paren != ':') {
- *flagp = TRYAGAIN;
- return NULL;
- } else {
- ret = NULL;
- goto parse_rest;
- }
- /*NOTREACHED*/
- default:
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- ++RExC_parse;
- }
- }} /* one for the default block, one for the switch */
- }
- else { /* (...) */
- capturing_parens:
- parno = RExC_npar;
- RExC_npar++;
-
- ret = reganode(pRExC_state, OPEN, parno);
- if (!SIZE_ONLY ){
- if (!RExC_nestroot)
- RExC_nestroot = parno;
- if (RExC_seen & REG_SEEN_RECURSE
- && !RExC_open_parens[parno-1])
- {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting open paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ret)));
- RExC_open_parens[parno-1]= ret;
- }
- }
- Set_Node_Length(ret, 1); /* MJD */
- Set_Node_Offset(ret, RExC_parse); /* MJD */
- is_open = 1;
- }
- }
- else /* ! paren */
- ret = NULL;
-
- parse_rest:
- /* Pick up the branches, linking them together. */
- parse_start = RExC_parse; /* MJD */
- br = regbranch(pRExC_state, &flags, 1,depth+1);
-
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
-
- /* branch_len = (paren != 0); */
-
- if (br == NULL)
- return(NULL);
- if (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, BRANCHJ, br, depth+1);
- }
- else { /* MJD */
- reginsert(pRExC_state, BRANCH, br, depth+1);
- Set_Node_Length(br, paren != 0);
- Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start);
- }
- have_branch = 1;
- if (SIZE_ONLY)
- RExC_extralen += 1; /* For BRANCHJ-BRANCH. */
- }
- else if (paren == ':') {
- *flagp |= flags&SIMPLE;
- }
- if (is_open) { /* Starts with OPEN. */
- REGTAIL(pRExC_state, ret, br); /* OPEN -> first. */
- }
- else if (paren != '?') /* Not Conditional */
- ret = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- lastbr = br;
- while (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- ender = reganode(pRExC_state, LONGJMP,0);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */
- }
- if (SIZE_ONLY)
- RExC_extralen += 2; /* Account for LONGJMP. */
- nextchar(pRExC_state);
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
- br = regbranch(pRExC_state, &flags, 0, depth+1);
-
- if (br == NULL)
- return(NULL);
- REGTAIL(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */
- lastbr = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- }
-
- if (have_branch || paren != ':') {
- /* Make a closing node, and hook it on the end. */
- switch (paren) {
- case ':':
- ender = reg_node(pRExC_state, TAIL);
- break;
- case 1:
- ender = reganode(pRExC_state, CLOSE, parno);
- if (!SIZE_ONLY && RExC_seen & REG_SEEN_RECURSE) {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting close paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ender)));
- RExC_close_parens[parno-1]= ender;
- if (RExC_nestroot == parno)
- RExC_nestroot = 0;
- }
- Set_Node_Offset(ender,RExC_parse+1); /* MJD */
- Set_Node_Length(ender,1); /* MJD */
- break;
- case '<':
- case ',':
- case '=':
- case '!':
- *flagp &= ~HASWIDTH;
- /* FALL THROUGH */
- case '>':
- ender = reg_node(pRExC_state, SUCCEED);
- break;
- case 0:
- ender = reg_node(pRExC_state, END);
- if (!SIZE_ONLY) {
- assert(!RExC_opend); /* there can only be one! */
- RExC_opend = ender;
- }
- break;
- }
- REGTAIL(pRExC_state, lastbr, ender);
-
- if (have_branch && !SIZE_ONLY) {
- if (depth==1)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
-
- /* Hook the tails of the branches to the closing node. */
- for (br = ret; br; br = regnext(br)) {
- const U8 op = PL_regkind[OP(br)];
- if (op == BRANCH) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(br), ender);
- }
- else if (op == BRANCHJ) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(NEXTOPER(br)), ender);
- }
- }
- }
- }
-
- {
- const char *p;
- static const char parens[] = "=!<,>";
-
- if (paren && (p = strchr(parens, paren))) {
- U8 node = ((p - parens) % 2) ? UNLESSM : IFMATCH;
- int flag = (p - parens) > 1;
-
- if (paren == '>')
- node = SUSPEND, flag = 0;
- reginsert(pRExC_state, node,ret, depth+1);
- Set_Node_Cur_Length(ret);
- Set_Node_Offset(ret, parse_start + 1);
- ret->flags = flag;
- REGTAIL_STUDY(pRExC_state, ret, reg_node(pRExC_state, TAIL));
- }
- }
-
- /* Check for proper termination. */
- if (paren) {
- RExC_flags = oregflags;
- if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched (");
- }
- }
- else if (!paren && RExC_parse < RExC_end) {
- if (*RExC_parse == ')') {
- RExC_parse++;
- vFAIL("Unmatched )");
- }
- else
- FAIL("Junk on end of regexp"); /* "Can't happen". */
- /* NOTREACHED */
- }
- if (after_freeze)
- RExC_npar = after_freeze;
- return(ret);
-}
-
-/*
- - regbranch - one alternative of an | operator
- *
- * Implements the concatenation operator.
- */
-STATIC regnode *
-S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register regnode *chain = NULL;
- register regnode *latest;
- I32 flags = 0, c = 0;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGBRANCH;
-
- DEBUG_PARSE("brnc");
-
- if (first)
- ret = NULL;
- else {
- if (!SIZE_ONLY && RExC_extralen)
- ret = reganode(pRExC_state, BRANCHJ,0);
- else {
- ret = reg_node(pRExC_state, BRANCH);
- Set_Node_Length(ret, 1);
- }
- }
-
- if (!first && SIZE_ONLY)
- RExC_extralen += 1; /* BRANCHJ */
-
- *flagp = WORST; /* Tentatively. */
-
- RExC_parse--;
- nextchar(pRExC_state);
- while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') {
- flags &= ~TRYAGAIN;
- latest = regpiece(pRExC_state, &flags,depth+1);
- if (latest == NULL) {
- if (flags & TRYAGAIN)
- continue;
- return(NULL);
- }
- else if (ret == NULL)
- ret = latest;
- *flagp |= flags&(HASWIDTH|POSTPONED);
- if (chain == NULL) /* First piece. */
- *flagp |= flags&SPSTART;
- else {
- RExC_naughty++;
- REGTAIL(pRExC_state, chain, latest);
- }
- chain = latest;
- c++;
- }
- if (chain == NULL) { /* Loop ran zero times. */
- chain = reg_node(pRExC_state, NOTHING);
- if (ret == NULL)
- ret = chain;
- }
- if (c == 1) {
- *flagp |= flags&SIMPLE;
- }
-
- return ret;
-}
-
-/*
- - regpiece - something followed by possible [*+?]
- *
- * Note that the branching code sequences used for ? and the general cases
- * of * and + are somewhat optimized: they use the same NOTHING node as
- * both the endmarker for their branch list and the body of the last branch.
- * It might seem that this node could be dispensed with entirely, but the
- * endmarker role is not redundant.
- */
-STATIC regnode *
-S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register char op;
- register char *next;
- I32 flags;
- const char * const origparse = RExC_parse;
- I32 min;
- I32 max = REG_INFTY;
- char *parse_start;
- const char *maxpos = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPIECE;
-
- DEBUG_PARSE("piec");
-
- ret = regatom(pRExC_state, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN)
- *flagp |= TRYAGAIN;
- return(NULL);
- }
-
- op = *RExC_parse;
-
- if (op == '{' && regcurly(RExC_parse)) {
- maxpos = NULL;
- parse_start = RExC_parse; /* MJD */
- next = RExC_parse + 1;
- while (isDIGIT(*next) || *next == ',') {
- if (*next == ',') {
- if (maxpos)
- break;
- else
- maxpos = next;
- }
- next++;
- }
- if (*next == '}') { /* got one */
- if (!maxpos)
- maxpos = next;
- RExC_parse++;
- min = atoi(RExC_parse);
- if (*maxpos == ',')
- maxpos++;
- else
- maxpos = RExC_parse;
- max = atoi(maxpos);
- if (!max && *maxpos != '0')
- max = REG_INFTY; /* meaning "infinity" */
- else if (max >= REG_INFTY)
- vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1);
- RExC_parse = next;
- nextchar(pRExC_state);
-
- do_curly:
- if ((flags&SIMPLE)) {
- RExC_naughty += 2 + RExC_naughty / 2;
- reginsert(pRExC_state, CURLY, ret, depth+1);
- Set_Node_Offset(ret, parse_start+1); /* MJD */
- Set_Node_Cur_Length(ret);
- }
- else {
- regnode * const w = reg_node(pRExC_state, WHILEM);
-
- w->flags = 0;
- REGTAIL(pRExC_state, ret, w);
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, LONGJMP,ret, depth+1);
- reginsert(pRExC_state, NOTHING,ret, depth+1);
- NEXT_OFF(ret) = 3; /* Go over LONGJMP. */
- }
- reginsert(pRExC_state, CURLYX,ret, depth+1);
- /* MJD hk */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Length(ret,
- op == '{' ? (RExC_parse - parse_start) : 1);
-
- if (!SIZE_ONLY && RExC_extralen)
- NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */
- REGTAIL(pRExC_state, ret, reg_node(pRExC_state, NOTHING));
- if (SIZE_ONLY)
- RExC_whilem_seen++, RExC_extralen += 3;
- RExC_naughty += 4 + RExC_naughty; /* compound interest */
- }
- ret->flags = 0;
-
- if (min > 0)
- *flagp = WORST;
- if (max > 0)
- *flagp |= HASWIDTH;
- if (max < min)
- vFAIL("Can't do {n,m} with n > m");
- if (!SIZE_ONLY) {
- ARG1_SET(ret, (U16)min);
- ARG2_SET(ret, (U16)max);
- }
-
- goto nest_check;
- }
- }
-
- if (!ISMULT1(op)) {
- *flagp = flags;
- return(ret);
- }
-
-#if 0 /* Now runtime fix should be reliable. */
-
- /* if this is reinstated, don't forget to put this back into perldiag:
-
- =item Regexp *+ operand could be empty at {#} in regex m/%s/
-
- (F) The part of the regexp subject to either the * or + quantifier
- could match an empty string. The {#} shows in the regular
- expression about where the problem was discovered.
-
- */
-
- if (!(flags&HASWIDTH) && op != '?')
- vFAIL("Regexp *+ operand could be empty");
-#endif
-
- parse_start = RExC_parse;
- nextchar(pRExC_state);
-
- *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH);
-
- if (op == '*' && (flags&SIMPLE)) {
- reginsert(pRExC_state, STAR, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 4;
- }
- else if (op == '*') {
- min = 0;
- goto do_curly;
- }
- else if (op == '+' && (flags&SIMPLE)) {
- reginsert(pRExC_state, PLUS, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 3;
- }
- else if (op == '+') {
- min = 1;
- goto do_curly;
- }
- else if (op == '?') {
- min = 0; max = 1;
- goto do_curly;
- }
- nest_check:
- if (!SIZE_ONLY && !(flags&(HASWIDTH|POSTPONED)) && max > REG_INFTY/3) {
- ckWARN3reg(RExC_parse,
- "%.*s matches null string many times",
- (int)(RExC_parse >= origparse ? RExC_parse - origparse : 0),
- origparse);
- }
-
- if (RExC_parse < RExC_end && *RExC_parse == '?') {
- nextchar(pRExC_state);
- reginsert(pRExC_state, MINMOD, ret, depth+1);
- REGTAIL(pRExC_state, ret, ret + NODE_STEP_REGNODE);
- }
-#ifndef REG_ALLOW_MINMOD_SUSPEND
- else
-#endif
- if (RExC_parse < RExC_end && *RExC_parse == '+') {
- regnode *ender;
- nextchar(pRExC_state);
- ender = reg_node(pRExC_state, SUCCEED);
- REGTAIL(pRExC_state, ret, ender);
- reginsert(pRExC_state, SUSPEND, ret, depth+1);
- ret->flags = 0;
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, ret, ender);
- /*ret= ender;*/
- }
-
- if (RExC_parse < RExC_end && ISMULT2(RExC_parse)) {
- RExC_parse++;
- vFAIL("Nested quantifiers");
- }
-
- return(ret);
-}
-
-
-/* reg_namedseq(pRExC_state,UVp)
-
- This is expected to be called by a parser routine that has
- recognized '\N' and needs to handle the rest. RExC_parse is
- expected to point at the first char following the N at the time
- of the call.
-
- If valuep is non-null then it is assumed that we are parsing inside
- of a charclass definition and the first codepoint in the resolved
- string is returned via *valuep and the routine will return NULL.
- In this mode if a multichar string is returned from the charnames
- handler a warning will be issued, and only the first char in the
- sequence will be examined. If the string returned is zero length
- then the value of *valuep is undefined and NON-NULL will
- be returned to indicate failure. (This will NOT be a valid pointer
- to a regnode.)
-
- If valuep is null then it is assumed that we are parsing normal text
- and inserts a new EXACT node into the program containing the resolved
- string and returns a pointer to the new node. If the string is
- zerolength a NOTHING node is emitted.
-
- On success RExC_parse is set to the char following the endbrace.
- Parsing failures will generate a fatal errorvia vFAIL(...)
-
- NOTE: We cache all results from the charnames handler locally in
- the RExC_charnames hash (created on first use) to prevent a charnames
- handler from playing silly-buggers and returning a short string and
- then a long string for a given pattern. Since the regexp program
- size is calculated during an initial parse this would result
- in a buffer overrun so we cache to prevent the charname result from
- changing during the course of the parse.
-
- */
-STATIC regnode *
-S_reg_namedseq(pTHX_ RExC_state_t *pRExC_state, UV *valuep, I32 *flagp)
-{
- char * name; /* start of the content of the name */
- char * endbrace; /* endbrace following the name */
- SV *sv_str = NULL;
- SV *sv_name = NULL;
- STRLEN len; /* this has various purposes throughout the code */
- bool cached = 0; /* if this is true then we shouldn't refcount dev sv_str */
- regnode *ret = NULL;
-
- PERL_ARGS_ASSERT_REG_NAMEDSEQ;
-
- if (*RExC_parse != '{' ||
- (*RExC_parse == '{' && RExC_parse[1]
- && strchr("0123456789", RExC_parse[1])))
- {
- GET_RE_DEBUG_FLAGS_DECL;
- if (valuep)
- /* no bare \N in a charclass */
- vFAIL("Missing braces on \\N{}");
- GET_RE_DEBUG_FLAGS;
- nextchar(pRExC_state);
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- RExC_parse--;
- Set_Node_Length(ret, 1); /* MJD */
- return ret;
- }
- name = RExC_parse+1;
- endbrace = strchr(RExC_parse, '}');
- if ( ! endbrace ) {
- RExC_parse++;
- vFAIL("Missing right brace on \\N{}");
- }
- RExC_parse = endbrace + 1;
-
-
- /* RExC_parse points at the beginning brace,
- endbrace points at the last */
- if ( name[0]=='U' && name[1]=='+' ) {
- /* its a "Unicode hex" notation {U+89AB} */
- I32 fl = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX
- | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0);
- UV cp;
- len = (STRLEN)(endbrace - name - 2);
- cp = grok_hex(name + 2, &len, &fl, NULL);
- if ( len != (STRLEN)(endbrace - name - 2) ) {
- cp = 0xFFFD;
- }
- if ( valuep ) {
- if (cp > 0xff) RExC_utf8 = 1;
- *valuep = cp;
- return NULL;
- }
-
- /* Need to convert to utf8 if either: won't fit into a byte, or the re
- * is going to be in utf8 and the representation changes under utf8. */
- if (cp > 0xff || (RExC_utf8 && ! UNI_IS_INVARIANT(cp))) {
- U8 string[UTF8_MAXBYTES+1];
- U8 *tmps;
- RExC_utf8 = 1;
- tmps = uvuni_to_utf8(string, cp);
- sv_str = newSVpvn_utf8((char*)string, tmps - string, TRUE);
- } else { /* Otherwise, no need for utf8, can skip that step */
- char string;
- string = (char)cp;
- sv_str= newSVpvn(&string, 1);
- }
- } else {
- /* fetch the charnames handler for this scope */
- HV * const table = GvHV(PL_hintgv);
- SV **cvp= table ?
- hv_fetchs(table, "charnames", FALSE) :
- NULL;
- SV *cv= cvp ? *cvp : NULL;
- HE *he_str;
- int count;
- /* create an SV with the name as argument */
- sv_name = newSVpvn(name, endbrace - name);
-
- if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
- vFAIL2("Constant(\\N{%" SVf "}) unknown: "
- "(possibly a missing \"use charnames ...\")",
- SVfARG(sv_name));
- }
- if (!cvp || !SvOK(*cvp)) { /* when $^H{charnames} = undef; */
- vFAIL2("Constant(\\N{%" SVf "}): "
- "$^H{charnames} is not defined", SVfARG(sv_name));
- }
-
-
-
- if (!RExC_charnames) {
- /* make sure our cache is allocated */
- RExC_charnames = newHV();
- sv_2mortal(MUTABLE_SV(RExC_charnames));
- }
- /* see if we have looked this one up before */
- he_str = hv_fetch_ent( RExC_charnames, sv_name, 0, 0 );
- if ( he_str ) {
- sv_str = HeVAL(he_str);
- cached = 1;
- } else {
- dSP ;
-
- ENTER ;
- SAVETMPS ;
- PUSHMARK(SP) ;
-
- XPUSHs(sv_name);
-
- PUTBACK ;
-
- count= call_sv(cv, G_SCALAR);
-
- if (count == 1) { /* XXXX is this right? dmq */
- sv_str = POPs;
- SvREFCNT_inc_simple_void(sv_str);
- }
-
- SPAGAIN ;
- PUTBACK ;
- FREETMPS ;
- LEAVE ;
-
- if ( !sv_str || !SvOK(sv_str) ) {
- vFAIL2("Constant(\\N{%" SVf "}): Call to &{$^H{charnames}} "
- "did not return a defined value", SVfARG(sv_name));
- }
- if (hv_store_ent( RExC_charnames, sv_name, sv_str, 0))
- cached = 1;
- }
- }
- if (valuep) {
- char *p = SvPV(sv_str, len);
- if (len) {
- STRLEN numlen = 1;
- if ( SvUTF8(sv_str) ) {
- *valuep = utf8_to_uvchr((U8*)p, &numlen);
- if (*valuep > 0x7F)
- RExC_utf8 = 1;
- /* XXXX
- We have to turn on utf8 for high bit chars otherwise
- we get failures with
-
- "ss" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
- "SS" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
-
- This is different from what \x{} would do with the same
- codepoint, where the condition is > 0xFF.
- - dmq
- */
-
-
- } else {
- *valuep = (UV)*p;
- /* warn if we havent used the whole string? */
- }
- if (numlen<len && SIZE_ONLY) {
- ckWARN2reg(RExC_parse,
- "Ignoring excess chars from \\N{%" SVf "} in character class",
- SVfARG(sv_name)
- );
- }
- } else if (SIZE_ONLY) {
- ckWARN2reg(RExC_parse,
- "Ignoring zero length \\N{%" SVf "} in character class",
- SVfARG(sv_name)
- );
- }
- SvREFCNT_dec(sv_name);
- if (!cached)
- SvREFCNT_dec(sv_str);
- return len ? NULL : (regnode *)&len;
- } else if(SvCUR(sv_str)) {
-
- char *s;
- char *p, *pend;
- STRLEN charlen = 1;
-#ifdef DEBUGGING
- char * parse_start = name-3; /* needed for the offsets */
-#endif
- GET_RE_DEBUG_FLAGS_DECL; /* needed for the offsets */
-
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s= STRING(ret);
-
- if ( RExC_utf8 && !SvUTF8(sv_str) ) {
- sv_utf8_upgrade(sv_str);
- } else if ( !RExC_utf8 && SvUTF8(sv_str) ) {
- RExC_utf8= 1;
- }
-
- p = SvPV(sv_str, len);
- pend = p + len;
- /* len is the length written, charlen is the size the char read */
- for ( len = 0; p < pend; p += charlen ) {
- if (UTF) {
- UV uvc = utf8_to_uvchr((U8*)p, &charlen);
- if (FOLD) {
- STRLEN foldlen,numlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
- uvc = toFOLD_uni(uvc, tmpbuf, &foldlen);
- /* Emit all the Unicode characters. */
-
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen)
- {
- uvc = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- } else {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- } else {
- len++;
- REGC(*p, s++);
- }
- }
- if (SIZE_ONLY) {
- RExC_size += STR_SZ(len);
- } else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- } else { /* zero length */
- ret = reg_node(pRExC_state,NOTHING);
- }
- SvREFCNT_dec(sv_name);
- if (!cached)
- SvREFCNT_dec(sv_str);
- return ret;
-
-}
-
-
-/*
- * reg_recode
- *
- * It returns the code point in utf8 for the value in *encp.
- * value: a code value in the source encoding
- * encp: a pointer to an Encode object
- *
- * If the result from Encode is not a single character,
- * it returns U+FFFD (Replacement character) and sets *encp to NULL.
- */
-STATIC UV
-S_reg_recode(pTHX_ const char value, SV **encp)
-{
- STRLEN numlen = 1;
- SV * const sv = newSVpvn_flags(&value, numlen, SVs_TEMP);
- const char * const s = *encp ? sv_recode_to_utf8(sv, *encp) : SvPVX(sv);
- const STRLEN newlen = SvCUR(sv);
- UV uv = UNICODE_REPLACEMENT;
-
- PERL_ARGS_ASSERT_REG_RECODE;
-
- if (newlen)
- uv = SvUTF8(sv)
- ? utf8n_to_uvchr((U8*)s, newlen, &numlen, UTF8_ALLOW_DEFAULT)
- : *(U8*)s;
-
- if (!newlen || numlen != newlen) {
- uv = UNICODE_REPLACEMENT;
- *encp = NULL;
- }
- return uv;
-}
-
-
-/*
- - regatom - the lowest level
-
- Try to identify anything special at the start of the pattern. If there
- is, then handle it as required. This may involve generating a single regop,
- such as for an assertion; or it may involve recursing, such as to
- handle a () structure.
-
- If the string doesn't start with something special then we gobble up
- as much literal text as we can.
-
- Once we have been able to handle whatever type of thing started the
- sequence, we return.
-
- Note: we have to be careful with escapes, as they can be both literal
- and special, and in the case of \10 and friends can either, depending
- on context. Specifically there are two seperate switches for handling
- escape sequences, with the one for handling literal escapes requiring
- a dummy entry for all of the special escapes that are actually handled
- by the other.
-*/
-
-STATIC regnode *
-S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret = NULL;
- I32 flags;
- char *parse_start = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_PARSE("atom");
- *flagp = WORST; /* Tentatively. */
-
- PERL_ARGS_ASSERT_REGATOM;
-
-tryagain:
- switch ((U8)*RExC_parse) {
- case '^':
- RExC_seen_zerolen++;
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MBOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SBOL);
- else
- ret = reg_node(pRExC_state, BOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '$':
- nextchar(pRExC_state);
- if (*RExC_parse)
- RExC_seen_zerolen++;
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MEOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SEOL);
- else
- ret = reg_node(pRExC_state, EOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '.':
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SANY);
- else
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '[':
- {
- char * const oregcomp_parse = ++RExC_parse;
- ret = regclass(pRExC_state,depth+1);
- if (*RExC_parse != ']') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched [");
- }
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */
- break;
- }
- case '(':
- nextchar(pRExC_state);
- ret = reg(pRExC_state, 1, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN) {
- if (RExC_parse == RExC_end) {
- /* Make parent create an empty node if needed. */
- *flagp |= TRYAGAIN;
- return(NULL);
- }
- goto tryagain;
- }
- return(NULL);
- }
- *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE|POSTPONED);
- break;
- case '|':
- case ')':
- if (flags & TRYAGAIN) {
- *flagp |= TRYAGAIN;
- return NULL;
- }
- vFAIL("Internal urp");
- /* Supposed to be caught earlier. */
- break;
- case '{':
- if (!regcurly(RExC_parse)) {
- RExC_parse++;
- goto defchar;
- }
- /* FALL THROUGH */
- case '?':
- case '+':
- case '*':
- RExC_parse++;
- vFAIL("Quantifier follows nothing");
- break;
- case 0xDF:
- case 0xC3:
- case 0xCE:
- do_foldchar:
- if (!LOC && FOLD) {
- U32 len,cp;
- len=0; /* silence a spurious compiler warning */
- if ((cp = what_len_TRICKYFOLD_safe(RExC_parse,RExC_end,UTF,len))) {
- *flagp |= HASWIDTH; /* could be SIMPLE too, but needs a handler in regexec.regrepeat */
- RExC_parse+=len-1; /* we get one from nextchar() as well. :-( */
- ret = reganode(pRExC_state, FOLDCHAR, cp);
- Set_Node_Length(ret, 1); /* MJD */
- nextchar(pRExC_state); /* kill whitespace under /x */
- return ret;
- }
- }
- goto outer_default;
- case '\\':
- /* Special Escapes
-
- This switch handles escape sequences that resolve to some kind
- of special regop and not to literal text. Escape sequnces that
- resolve to literal text are handled below in the switch marked
- "Literal Escapes".
-
- Every entry in this switch *must* have a corresponding entry
- in the literal escape switch. However, the opposite is not
- required, as the default for this switch is to jump to the
- literal text handling code.
- */
- switch ((U8)*++RExC_parse) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- goto do_foldchar;
- /* Special Escapes */
- case 'A':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, SBOL);
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'G':
- ret = reg_node(pRExC_state, GPOS);
- RExC_seen |= REG_SEEN_GPOS;
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'K':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, KEEPS);
- *flagp |= SIMPLE;
- /* XXX:dmq : disabling in-place substitution seems to
- * be necessary here to avoid cases of memory corruption, as
- * with: C<$_="x" x 80; s/x\K/y/> -- rgs
- */
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- goto finish_meta_pat;
- case 'Z':
- ret = reg_node(pRExC_state, SEOL);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'z':
- ret = reg_node(pRExC_state, EOS);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'C':
- ret = reg_node(pRExC_state, CANY);
- RExC_seen |= REG_SEEN_CANY;
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'X':
- ret = reg_node(pRExC_state, CLUMP);
- *flagp |= HASWIDTH;
- goto finish_meta_pat;
- case 'w':
- ret = reg_node(pRExC_state, (U8)(LOC ? ALNUML : ALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'W':
- ret = reg_node(pRExC_state, (U8)(LOC ? NALNUML : NALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'b':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? BOUNDL : BOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'B':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? NBOUNDL : NBOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 's':
- ret = reg_node(pRExC_state, (U8)(LOC ? SPACEL : SPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'S':
- ret = reg_node(pRExC_state, (U8)(LOC ? NSPACEL : NSPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'd':
- ret = reg_node(pRExC_state, DIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'D':
- ret = reg_node(pRExC_state, NDIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'R':
- ret = reg_node(pRExC_state, LNBREAK);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'h':
- ret = reg_node(pRExC_state, HORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'H':
- ret = reg_node(pRExC_state, NHORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'v':
- ret = reg_node(pRExC_state, VERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'V':
- ret = reg_node(pRExC_state, NVERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- finish_meta_pat:
- nextchar(pRExC_state);
- Set_Node_Length(ret, 2); /* MJD */
- break;
- case 'p':
- case 'P':
- {
- char* const oldregxend = RExC_end;
-#ifdef DEBUGGING
- char* parse_start = RExC_parse - 2;
-#endif
-
- if (RExC_parse[1] == '{') {
- /* a lovely hack--pretend we saw [\pX] instead */
- RExC_end = strchr(RExC_parse, '}');
- if (!RExC_end) {
- const U8 c = (U8)*RExC_parse;
- RExC_parse += 2;
- RExC_end = oldregxend;
- vFAIL2("Missing right brace on \\%c{}", c);
- }
- RExC_end++;
- }
- else {
- RExC_end = RExC_parse + 2;
- if (RExC_end > oldregxend)
- RExC_end = oldregxend;
- }
- RExC_parse--;
-
- ret = regclass(pRExC_state,depth+1);
-
- RExC_end = oldregxend;
- RExC_parse--;
-
- Set_Node_Offset(ret, parse_start + 2);
- Set_Node_Cur_Length(ret);
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- }
- break;
- case 'N':
- /* Handle \N and \N{NAME} here and not below because it can be
- multicharacter. join_exact() will join them up later on.
- Also this makes sure that things like /\N{BLAH}+/ and
- \N{BLAH} being multi char Just Happen. dmq*/
- ++RExC_parse;
- ret= reg_namedseq(pRExC_state, NULL, flagp);
- break;
- case 'k': /* Handle \k<NAME> and \k'NAME' */
- parse_named_seq:
- {
- char ch= RExC_parse[1];
- if (ch != '<' && ch != '\'' && ch != '{') {
- RExC_parse++;
- vFAIL2("Sequence %.2s... not terminated",parse_start);
- } else {
- /* this pretty much dupes the code for (?P=...) in reg(), if
- you change this make sure you change that */
- char* name_start = (RExC_parse += 2);
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- ch= (ch == '<') ? '>' : (ch == '{') ? '}' : '\'';
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
-
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
-
- }
- break;
- }
- case 'g':
- case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 num;
- bool isg = *RExC_parse == 'g';
- bool isrel = 0;
- bool hasbrace = 0;
- if (isg) {
- RExC_parse++;
- if (*RExC_parse == '{') {
- RExC_parse++;
- hasbrace = 1;
- }
- if (*RExC_parse == '-') {
- RExC_parse++;
- isrel = 1;
- }
- if (hasbrace && !isDIGIT(*RExC_parse)) {
- if (isrel) RExC_parse--;
- RExC_parse -= 2;
- goto parse_named_seq;
- } }
- num = atoi(RExC_parse);
- if (isg && num == 0)
- vFAIL("Reference to invalid group 0");
- if (isrel) {
- num = RExC_npar - num;
- if (num < 1)
- vFAIL("Reference to nonexistent or unclosed group");
- }
- if (!isg && num > 9 && num >= RExC_npar)
- goto defchar;
- else {
- char * const parse_start = RExC_parse - 1; /* MJD */
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (parse_start == RExC_parse - 1)
- vFAIL("Unterminated \\g... pattern");
- if (hasbrace) {
- if (*RExC_parse != '}')
- vFAIL("Unterminated \\g{...} pattern");
- RExC_parse++;
- }
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens)
- vFAIL("Reference to nonexistent group");
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? REFFL : REFF) : REF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- }
- }
- break;
- case '\0':
- if (RExC_parse >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- /* Do not generate "unrecognized" warnings here, we fall
- back into the quick-grab loop below */
- parse_start--;
- goto defchar;
- }
- break;
-
- case '#':
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if ( reg_skipcomment( pRExC_state ) )
- goto tryagain;
- }
- /* FALL THROUGH */
-
- default:
- outer_default:{
- register STRLEN len;
- register UV ender;
- register char *p;
- char *s;
- STRLEN foldlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
-
- parse_start = RExC_parse - 1;
-
- RExC_parse++;
-
- defchar:
- ender = 0;
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s = STRING(ret);
- for (len = 0, p = RExC_parse - 1;
- len < 127 && p < RExC_end;
- len++)
- {
- char * const oldp = p;
-
- if (RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- switch ((U8)*p) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case '^':
- case '$':
- case '.':
- case '[':
- case '(':
- case ')':
- case '|':
- goto loopdone;
- case '\\':
- /* Literal Escapes Switch
-
- This switch is meant to handle escape sequences that
- resolve to a literal character.
-
- Every escape sequence that represents something
- else, like an assertion or a char class, is handled
- in the switch marked 'Special Escapes' above in this
- routine, but also has an entry here as anything that
- isn't explicitly mentioned here will be treated as
- an unescaped equivalent literal.
- */
-
- switch ((U8)*++p) {
- /* These are all the special escapes. */
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case 'A': /* Start assertion */
- case 'b': case 'B': /* Word-boundary assertion*/
- case 'C': /* Single char !DANGEROUS! */
- case 'd': case 'D': /* digit class */
- case 'g': case 'G': /* generic-backref, pos assertion */
- case 'h': case 'H': /* HORIZWS */
- case 'k': case 'K': /* named backref, keep marker */
- case 'N': /* named char sequence */
- case 'p': case 'P': /* Unicode property */
- case 'R': /* LNBREAK */
- case 's': case 'S': /* space class */
- case 'v': case 'V': /* VERTWS */
- case 'w': case 'W': /* word class */
- case 'X': /* eXtended Unicode "combining character sequence" */
- case 'z': case 'Z': /* End of line/string assertion */
- --p;
- goto loopdone;
-
- /* Anything after here is an escape that resolves to a
- literal. (Except digits, which may or may not)
- */
- case 'n':
- ender = '\n';
- p++;
- break;
- case 'r':
- ender = '\r';
- p++;
- break;
- case 't':
- ender = '\t';
- p++;
- break;
- case 'f':
- ender = '\f';
- p++;
- break;
- case 'e':
- ender = ASCII_TO_NATIVE('\033');
- p++;
- break;
- case 'a':
- ender = ASCII_TO_NATIVE('\007');
- p++;
- break;
- case 'x':
- if (*++p == '{') {
- char* const e = strchr(p, '}');
-
- if (!e) {
- RExC_parse = p + 1;
- vFAIL("Missing right brace on \\x{}");
- }
- else {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = e - p - 1;
- ender = grok_hex(p + 1, &numlen, &flags, NULL);
- if (ender > 0xff)
- RExC_utf8 = 1;
- p = e + 1;
- }
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = 2;
- ender = grok_hex(p, &numlen, &flags, NULL);
- p += numlen;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- p++;
- ender = UCHARAT(p++);
- ender = toCTRL(ender);
- break;
- case '0': case '1': case '2': case '3':case '4':
- case '5': case '6': case '7': case '8':case '9':
- if (*p == '0' ||
- (isDIGIT(p[1]) && atoi(p) >= RExC_npar) ) {
- I32 flags = 0;
- STRLEN numlen = 3;
- ender = grok_oct(p, &numlen, &flags, NULL);
-
- /* An octal above 0xff is interpreted differently
- * depending on if the re is in utf8 or not. If it
- * is in utf8, the value will be itself, otherwise
- * it is interpreted as modulo 0x100. It has been
- * decided to discourage the use of octal above the
- * single-byte range. For now, warn only when
- * it ends up modulo */
- if (SIZE_ONLY && ender >= 0x100
- && ! UTF && ! PL_encoding) {
- ckWARNregdep(p, "Use of octal value above 377 is deprecated");
- }
- p += numlen;
- }
- else {
- --p;
- goto loopdone;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- recode_encoding:
- {
- SV* enc = PL_encoding;
- ender = reg_recode((const char)(U8)ender, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(p, "Invalid escape in the specified encoding");
- RExC_utf8 = 1;
- }
- break;
- case '\0':
- if (p >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- if (!SIZE_ONLY&& isALPHA(*p))
- ckWARN2reg(p + 1, "Unrecognized escape \\%c passed through", UCHARAT(p));
- goto normal_default;
- }
- break;
- default:
- normal_default:
- if (UTF8_IS_START(*p) && UTF) {
- STRLEN numlen;
- ender = utf8n_to_uvchr((U8*)p, RExC_end - p,
- &numlen, UTF8_ALLOW_DEFAULT);
- p += numlen;
- }
- else
- ender = *p++;
- break;
- }
- if ( RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- if (UTF && FOLD) {
- /* Prime the casefolded buffer. */
- ender = toFOLD_uni(ender, tmpbuf, &foldlen);
- }
- if (p < RExC_end && ISMULT2(p)) { /* Back off on ?+*. */
- if (len)
- p = oldp;
- else if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- }
- else {
- len++;
- REGC((char)ender, s++);
- }
- break;
- }
- if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- len += unilen;
- s += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break;
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- len--;
- }
- else
- REGC((char)ender, s++);
- }
- loopdone:
- RExC_parse = p - 1;
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
- {
- /* len is STRLEN which is unsigned, need to copy to signed */
- IV iv = len;
- if (iv < 0)
- vFAIL("Internal disaster");
- }
- if (len > 0)
- *flagp |= HASWIDTH;
- if (len == 1 && UNI_IS_INVARIANT(ender))
- *flagp |= SIMPLE;
-
- if (SIZE_ONLY)
- RExC_size += STR_SZ(len);
- else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- }
- break;
- }
-
- return(ret);
-}
-
-STATIC char *
-S_regwhite( RExC_state_t *pRExC_state, char *p )
-{
- const char *e = RExC_end;
-
- PERL_ARGS_ASSERT_REGWHITE;
-
- while (p < e) {
- if (isSPACE(*p))
- ++p;
- else if (*p == '#') {
- bool ended = 0;
- do {
- if (*p++ == '\n') {
- ended = 1;
- break;
- }
- } while (p < e);
- if (!ended)
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- }
- else
- break;
- }
- return p;
-}
-
-/* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]].
- Character classes ([:foo:]) can also be negated ([:^foo:]).
- Returns a named class id (ANYOF_XXX) if successful, -1 otherwise.
- Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed,
- but trigger failures because they are currently unimplemented. */
-
-#define POSIXCC_DONE(c) ((c) == ':')
-#define POSIXCC_NOTYET(c) ((c) == '=' || (c) == '.')
-#define POSIXCC(c) (POSIXCC_DONE(c) || POSIXCC_NOTYET(c))
-
-STATIC I32
-S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value)
-{
- dVAR;
- I32 namedclass = OOB_NAMEDCLASS;
-
- PERL_ARGS_ASSERT_REGPPOSIXCC;
-
- if (value == '[' && RExC_parse + 1 < RExC_end &&
- /* I smell either [: or [= or [. -- POSIX has been here, right? */
- POSIXCC(UCHARAT(RExC_parse))) {
- const char c = UCHARAT(RExC_parse);
- char* const s = RExC_parse++;
-
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != c)
- RExC_parse++;
- if (RExC_parse == RExC_end)
- /* Grandfather lone [:, [=, [. */
- RExC_parse = s;
- else {
- const char* const t = RExC_parse++; /* skip over the c */
- assert(*t == c);
-
- if (UCHARAT(RExC_parse) == ']') {
- const char *posixcc = s + 1;
- RExC_parse++; /* skip over the ending ] */
-
- if (*s == ':') {
- const I32 complement = *posixcc == '^' ? *posixcc++ : 0;
- const I32 skip = t - posixcc;
-
- /* Initially switch on the length of the name. */
- switch (skip) {
- case 4:
- if (memEQ(posixcc, "word", 4)) /* this is not POSIX, this is the Perl \w */
- namedclass = complement ? ANYOF_NALNUM : ANYOF_ALNUM;
- break;
- case 5:
- /* Names all of length 5. */
- /* alnum alpha ascii blank cntrl digit graph lower
- print punct space upper */
- /* Offset 4 gives the best switch position. */
- switch (posixcc[4]) {
- case 'a':
- if (memEQ(posixcc, "alph", 4)) /* alpha */
- namedclass = complement ? ANYOF_NALPHA : ANYOF_ALPHA;
- break;
- case 'e':
- if (memEQ(posixcc, "spac", 4)) /* space */
- namedclass = complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC;
- break;
- case 'h':
- if (memEQ(posixcc, "grap", 4)) /* graph */
- namedclass = complement ? ANYOF_NGRAPH : ANYOF_GRAPH;
- break;
- case 'i':
- if (memEQ(posixcc, "asci", 4)) /* ascii */
- namedclass = complement ? ANYOF_NASCII : ANYOF_ASCII;
- break;
- case 'k':
- if (memEQ(posixcc, "blan", 4)) /* blank */
- namedclass = complement ? ANYOF_NBLANK : ANYOF_BLANK;
- break;
- case 'l':
- if (memEQ(posixcc, "cntr", 4)) /* cntrl */
- namedclass = complement ? ANYOF_NCNTRL : ANYOF_CNTRL;
- break;
- case 'm':
- if (memEQ(posixcc, "alnu", 4)) /* alnum */
- namedclass = complement ? ANYOF_NALNUMC : ANYOF_ALNUMC;
- break;
- case 'r':
- if (memEQ(posixcc, "lowe", 4)) /* lower */
- namedclass = complement ? ANYOF_NLOWER : ANYOF_LOWER;
- else if (memEQ(posixcc, "uppe", 4)) /* upper */
- namedclass = complement ? ANYOF_NUPPER : ANYOF_UPPER;
- break;
- case 't':
- if (memEQ(posixcc, "digi", 4)) /* digit */
- namedclass = complement ? ANYOF_NDIGIT : ANYOF_DIGIT;
- else if (memEQ(posixcc, "prin", 4)) /* print */
- namedclass = complement ? ANYOF_NPRINT : ANYOF_PRINT;
- else if (memEQ(posixcc, "punc", 4)) /* punct */
- namedclass = complement ? ANYOF_NPUNCT : ANYOF_PUNCT;
- break;
- }
- break;
- case 6:
- if (memEQ(posixcc, "xdigit", 6))
- namedclass = complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT;
- break;
- }
-
- if (namedclass == OOB_NAMEDCLASS)
- Simple_vFAIL3("POSIX class [:%.*s:] unknown",
- t - s - 1, s + 1);
- assert (posixcc[skip] == ':');
- assert (posixcc[skip+1] == ']');
- } else if (!SIZE_ONLY) {
- /* [[=foo=]] and [[.foo.]] are still future. */
-
- /* adjust RExC_parse so the warning shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse) != ']')
- RExC_parse++;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- } else {
- /* Maternal grandfather:
- * "[:" ending in ":" but not in ":]" */
- RExC_parse = s;
- }
- }
- }
-
- return namedclass;
-}
-
-STATIC void
-S_checkposixcc(pTHX_ RExC_state_t *pRExC_state)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_CHECKPOSIXCC;
-
- if (POSIXCC(UCHARAT(RExC_parse))) {
- const char *s = RExC_parse;
- const char c = *s++;
-
- while (isALNUM(*s))
- s++;
- if (*s && c == *s && s[1] == ']') {
- ckWARN3reg(s+2,
- "POSIX syntax [%c %c] belongs inside character classes",
- c, c);
-
- /* [[=foo=]] and [[.foo.]] are still future. */
- if (POSIXCC_NOTYET(c)) {
- /* adjust RExC_parse so the error shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse++) != ']')
- NOOP;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- }
- }
-}
-
-
-#define _C_C_T_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_N##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '!'; \
- what = WORD; \
- break
-
-#define _C_C_T_NOLOC_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '!'; \
- what = WORD; \
- break
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define POSIX_CC_UNI_NAME(CCNAME) CCNAME
-#else
-#define POSIX_CC_UNI_NAME(CCNAME) "Posix" CCNAME
-#endif
-
-/*
- parse a class specification and produce either an ANYOF node that
- matches the pattern or if the pattern matches a single char only and
- that char is < 256 and we are case insensitive then we produce an
- EXACT node instead.
-*/
-
-STATIC regnode *
-S_regclass(pTHX_ RExC_state_t *pRExC_state, U32 depth)
-{
- dVAR;
- register UV nextvalue;
- register IV prevvalue = OOB_UNICODE;
- register IV range = 0;
- UV value = 0; /* XXX:dmq: needs to be referenceable (unfortunately) */
- register regnode *ret;
- STRLEN numlen;
- IV namedclass;
- char *rangebegin = NULL;
- bool need_class = 0;
- SV *listsv = NULL;
- UV n;
- bool optimize_invert = TRUE;
- AV* unicode_alternate = NULL;
-#ifdef EBCDIC
- UV literal_endpoint = 0;
-#endif
- UV stored = 0; /* number of chars stored in the class */
-
- regnode * const orig_emit = RExC_emit; /* Save the original RExC_emit in
- case we need to change the emitted regop to an EXACT. */
- const char * orig_parse = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCLASS;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- DEBUG_PARSE("clas");
-
- /* Assume we are going to generate an ANYOF node. */
- ret = reganode(pRExC_state, ANYOF, 0);
-
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) = 0;
-
- if (UCHARAT(RExC_parse) == '^') { /* Complement of range. */
- RExC_naughty++;
- RExC_parse++;
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) |= ANYOF_INVERT;
- }
-
- if (SIZE_ONLY) {
- RExC_size += ANYOF_SKIP;
- listsv = &PL_sv_undef; /* For code scanners: listsv always non-NULL. */
- }
- else {
- RExC_emit += ANYOF_SKIP;
- if (FOLD)
- ANYOF_FLAGS(ret) |= ANYOF_FOLD;
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_LOCALE;
- ANYOF_BITMAP_ZERO(ret);
- listsv = newSVpvs("# comment\n");
- }
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
-
- if (!SIZE_ONLY && POSIXCC(nextvalue))
- checkposixcc(pRExC_state);
-
- /* allow 1st char to be ] (allowing it to be - is dealt with later) */
- if (UCHARAT(RExC_parse) == ']')
- goto charclassloop;
-
-parseit:
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != ']') {
-
- charclassloop:
-
- namedclass = OOB_NAMEDCLASS; /* initialize as illegal */
-
- if (!range)
- rangebegin = RExC_parse;
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
- if (value == '[' && POSIXCC(nextvalue))
- namedclass = regpposixcc(pRExC_state, value);
- else if (value == '\\') {
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
- /* Some compilers cannot handle switching on 64-bit integer
- * values, therefore value cannot be an UV. Yes, this will
- * be a problem later if we want switch on Unicode.
- * A similar issue a little bit later when switching on
- * namedclass. --jhi */
- switch ((I32)value) {
- case 'w': namedclass = ANYOF_ALNUM; break;
- case 'W': namedclass = ANYOF_NALNUM; break;
- case 's': namedclass = ANYOF_SPACE; break;
- case 'S': namedclass = ANYOF_NSPACE; break;
- case 'd': namedclass = ANYOF_DIGIT; break;
- case 'D': namedclass = ANYOF_NDIGIT; break;
- case 'v': namedclass = ANYOF_VERTWS; break;
- case 'V': namedclass = ANYOF_NVERTWS; break;
- case 'h': namedclass = ANYOF_HORIZWS; break;
- case 'H': namedclass = ANYOF_NHORIZWS; break;
- case 'N': /* Handle \N{NAME} in class */
- {
- /* We only pay attention to the first char of
- multichar strings being returned. I kinda wonder
- if this makes sense as it does change the behaviour
- from earlier versions, OTOH that behaviour was broken
- as well. */
- UV v; /* value is register so we cant & it /grrr */
- if (reg_namedseq(pRExC_state, &v, NULL)) {
- goto parseit;
- }
- value= v;
- }
- break;
- case 'p':
- case 'P':
- {
- char *e;
- if (RExC_parse >= RExC_end)
- vFAIL2("Empty \\%c{}", (U8)value);
- if (*RExC_parse == '{') {
- const U8 c = (U8)value;
- e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL2("Missing right brace on \\%c{}", c);
- while (isSPACE(UCHARAT(RExC_parse)))
- RExC_parse++;
- if (e == RExC_parse)
- vFAIL2("Empty \\%c{}", c);
- n = e - RExC_parse;
- while (isSPACE(UCHARAT(RExC_parse + n - 1)))
- n--;
- }
- else {
- e = RExC_parse;
- n = 1;
- }
- if (!SIZE_ONLY) {
- if (UCHARAT(RExC_parse) == '^') {
- RExC_parse++;
- n--;
- value = value == 'p' ? 'P' : 'p'; /* toggle */
- while (isSPACE(UCHARAT(RExC_parse))) {
- RExC_parse++;
- n--;
- }
- }
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::%.*s\n",
- (value=='p' ? '+' : '!'), (int)n, RExC_parse);
- }
- RExC_parse = e + 1;
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- namedclass = ANYOF_MAX; /* no official name, but it's named */
- }
- break;
- case 'n': value = '\n'; break;
- case 'r': value = '\r'; break;
- case 't': value = '\t'; break;
- case 'f': value = '\f'; break;
- case 'b': value = '\b'; break;
- case 'e': value = ASCII_TO_NATIVE('\033');break;
- case 'a': value = ASCII_TO_NATIVE('\007');break;
- case 'x':
- if (*RExC_parse == '{') {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- char * const e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL("Missing right brace on \\x{}");
-
- numlen = e - RExC_parse;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse = e + 1;
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- numlen = 2;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- }
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- value = UCHARAT(RExC_parse++);
- value = toCTRL(value);
- break;
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 flags = 0;
- numlen = 3;
- value = grok_oct(--RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- }
- recode_encoding:
- {
- SV* enc = PL_encoding;
- value = reg_recode((const char)(U8)value, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(RExC_parse,
- "Invalid escape in the specified encoding");
- break;
- }
- default:
- if (!SIZE_ONLY && isALPHA(value))
- ckWARN2reg(RExC_parse,
- "Unrecognized escape \\%c in character class passed through",
- (int)value);
- break;
- }
- } /* end of \blah */
-#ifdef EBCDIC
- else
- literal_endpoint++;
-#endif
-
- if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */
-
- if (!SIZE_ONLY && !need_class)
- ANYOF_CLASS_ZERO(ret);
-
- need_class = 1;
-
- /* a bad range like a-\d, a-[:digit:] ? */
- if (range) {
- if (!SIZE_ONLY) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- ckWARN4reg(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
-
- if (prevvalue < 256) {
- ANYOF_BITMAP_SET(ret, prevvalue);
- ANYOF_BITMAP_SET(ret, '-');
- }
- else {
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-');
- }
- }
-
- range = 0; /* this was not a true range */
- }
-
-
-
- if (!SIZE_ONLY) {
- const char *what = NULL;
- char yesno = 0;
-
- if (namedclass > OOB_NAMEDCLASS)
- optimize_invert = FALSE;
- /* Possible truncation here but in some 64-bit environments
- * the compiler gets heartburn about switch on 64-bit values.
- * A similar issue a little earlier when switching on value.
- * --jhi */
- switch ((I32)namedclass) {
-
- case _C_C_T_(ALNUMC, isALNUMC(value), POSIX_CC_UNI_NAME("Alnum"));
- case _C_C_T_(ALPHA, isALPHA(value), POSIX_CC_UNI_NAME("Alpha"));
- case _C_C_T_(BLANK, isBLANK(value), POSIX_CC_UNI_NAME("Blank"));
- case _C_C_T_(CNTRL, isCNTRL(value), POSIX_CC_UNI_NAME("Cntrl"));
- case _C_C_T_(GRAPH, isGRAPH(value), POSIX_CC_UNI_NAME("Graph"));
- case _C_C_T_(LOWER, isLOWER(value), POSIX_CC_UNI_NAME("Lower"));
- case _C_C_T_(PRINT, isPRINT(value), POSIX_CC_UNI_NAME("Print"));
- case _C_C_T_(PSXSPC, isPSXSPC(value), POSIX_CC_UNI_NAME("Space"));
- case _C_C_T_(PUNCT, isPUNCT(value), POSIX_CC_UNI_NAME("Punct"));
- case _C_C_T_(UPPER, isUPPER(value), POSIX_CC_UNI_NAME("Upper"));
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
- case _C_C_T_(ALNUM, isALNUM(value), "Word");
- case _C_C_T_(SPACE, isSPACE(value), "SpacePerl");
-#else
- case _C_C_T_(SPACE, isSPACE(value), "PerlSpace");
- case _C_C_T_(ALNUM, isALNUM(value), "PerlWord");
-#endif
- case _C_C_T_(XDIGIT, isXDIGIT(value), "XDigit");
- case _C_C_T_NOLOC_(VERTWS, is_VERTWS_latin1(&value), "VertSpace");
- case _C_C_T_NOLOC_(HORIZWS, is_HORIZWS_latin1(&value), "HorizSpace");
- case ANYOF_ASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_ASCII);
- else {
-#ifndef EBCDIC
- for (value = 0; value < 128; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '+';
- what = "ASCII";
- break;
- case ANYOF_NASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NASCII);
- else {
-#ifndef EBCDIC
- for (value = 128; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (!isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '!';
- what = "ASCII";
- break;
- case ANYOF_DIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_DIGIT);
- else {
- /* consecutive digits assumed */
- for (value = '0'; value <= '9'; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '+';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_NDIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NDIGIT);
- else {
- /* consecutive digits assumed */
- for (value = 0; value < '0'; value++)
- ANYOF_BITMAP_SET(ret, value);
- for (value = '9' + 1; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '!';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_MAX:
- /* this is to handle \p and \P */
- break;
- default:
- vFAIL("Invalid [::] class");
- break;
- }
- if (what) {
- /* Strings such as "+utf8::isWord\n" */
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::Is%s\n", yesno, what);
- }
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_CLASS;
- continue;
- }
- } /* end of namedclass \blah */
-
- if (range) {
- if (prevvalue > (IV)value) /* b-a */ {
- const int w = RExC_parse - rangebegin;
- Simple_vFAIL4("Invalid [] range \"%*.*s\"", w, w, rangebegin);
- range = 0; /* not a valid range */
- }
- }
- else {
- prevvalue = value; /* save the beginning of the range */
- if (*RExC_parse == '-' && RExC_parse+1 < RExC_end &&
- RExC_parse[1] != ']') {
- RExC_parse++;
-
- /* a bad range like \w-, [:word:]- ? */
- if (namedclass > OOB_NAMEDCLASS) {
- if (ckWARN(WARN_REGEXP)) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- vWARN4(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
- }
- if (!SIZE_ONLY)
- ANYOF_BITMAP_SET(ret, '-');
- } else
- range = 1; /* yeah, it's a range! */
- continue; /* but do it the next time */
- }
- }
-
- /* now is the next time */
- /*stored += (value - prevvalue + 1);*/
- if (!SIZE_ONLY) {
- if (prevvalue < 256) {
- const IV ceilvalue = value < 256 ? value : 255;
- IV i;
-#ifdef EBCDIC
- /* In EBCDIC [\x89-\x91] should include
- * the \x8e but [i-j] should not. */
- if (literal_endpoint == 2 &&
- ((isLOWER(prevvalue) && isLOWER(ceilvalue)) ||
- (isUPPER(prevvalue) && isUPPER(ceilvalue))))
- {
- if (isLOWER(prevvalue)) {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isLOWER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- } else {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isUPPER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- else
-#endif
- for (i = prevvalue; i <= ceilvalue; i++) {
- if (!ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- if (value > 255 || UTF) {
- const UV prevnatvalue = NATIVE_TO_UNI(prevvalue);
- const UV natvalue = NATIVE_TO_UNI(value);
- stored+=2; /* can't optimize this class */
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- if (prevnatvalue < natvalue) { /* what about > ? */
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n",
- prevnatvalue, natvalue);
- }
- else if (prevnatvalue == natvalue) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", natvalue);
- if (FOLD) {
- U8 foldbuf[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const UV f = to_uni_fold(natvalue, foldbuf, &foldlen);
-
-#ifdef EBCDIC /* RD t/uni/fold ff and 6b */
- if (RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xDF || f == 0x92)) {
- f = NATIVE_TO_UNI(f);
- }
-#endif
- /* If folding and foldable and a single
- * character, insert also the folded version
- * to the charclass. */
- if (f != value) {
-#ifdef EBCDIC /* RD tunifold ligatures s,t fb05, fb06 */
- if ((RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xA2 &&
- (value == 0xFB05 || value == 0xFB06))) ?
- foldlen == ((STRLEN)UNISKIP(f) - 1) :
- foldlen == (STRLEN)UNISKIP(f) )
-#else
- if (foldlen == (STRLEN)UNISKIP(f))
-#endif
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n", f);
- else {
- /* Any multicharacter foldings
- * require the following transform:
- * [ABCDEF] -> (?:[ABCabcDEFd]|pq|rst)
- * where E folds into "pq" and F folds
- * into "rst", all other characters
- * fold to single characters. We save
- * away these multicharacter foldings,
- * to be later saved as part of the
- * additional "s" data. */
- SV *sv;
-
- if (!unicode_alternate)
- unicode_alternate = newAV();
- sv = newSVpvn_utf8((char*)foldbuf, foldlen,
- TRUE);
- av_push(unicode_alternate, sv);
- }
- }
-
- /* If folding and the value is one of the Greek
- * sigmas insert a few more sigmas to make the
- * folding rules of the sigmas to work right.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (literal or EXACTF cases) are handled
- * during runtime in regexec.c:S_find_byclass(). */
- if (value == UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA);
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- else if (value == UNICODE_GREEK_CAPITAL_LETTER_SIGMA)
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- }
- }
-#ifdef EBCDIC
- literal_endpoint = 0;
-#endif
- }
-
- range = 0; /* this range (if it was one) is done now */
- }
-
- if (need_class) {
- ANYOF_FLAGS(ret) |= ANYOF_LARGE;
- if (SIZE_ONLY)
- RExC_size += ANYOF_CLASS_ADD_SKIP;
- else
- RExC_emit += ANYOF_CLASS_ADD_SKIP;
- }
-
-
- if (SIZE_ONLY)
- return ret;
- /****** !SIZE_ONLY AFTER HERE *********/
-
- if( stored == 1 && (value < 128 || (value < 256 && !UTF))
- && !( ANYOF_FLAGS(ret) & ( ANYOF_FLAGS_ALL ^ ANYOF_FOLD ) )
- ) {
- /* optimize single char class to an EXACT node
- but *only* when its not a UTF/high char */
- const char * cur_parse= RExC_parse;
- RExC_emit = (regnode *)orig_emit;
- RExC_parse = (char *)orig_parse;
- ret = reg_node(pRExC_state,
- (U8)((ANYOF_FLAGS(ret) & ANYOF_FOLD) ? EXACTF : EXACT));
- RExC_parse = (char *)cur_parse;
- *STRING(ret)= (char)value;
- STR_LEN(ret)= 1;
- RExC_emit += STR_SZ(1);
- SvREFCNT_dec(listsv);
- return ret;
- }
- /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */
- if ( /* If the only flag is folding (plus possibly inversion). */
- ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD)
- ) {
- for (value = 0; value < 256; ++value) {
- if (ANYOF_BITMAP_TEST(ret, value)) {
- UV fold = PL_fold[value];
-
- if (fold != value)
- ANYOF_BITMAP_SET(ret, fold);
- }
- }
- ANYOF_FLAGS(ret) &= ~ANYOF_FOLD;
- }
-
- /* optimize inverted simple patterns (e.g. [^a-z]) */
- if (optimize_invert &&
- /* If the only flag is inversion. */
- (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) {
- for (value = 0; value < ANYOF_BITMAP_SIZE; ++value)
- ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL;
- ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL;
- }
- {
- AV * const av = newAV();
- SV *rv;
- /* The 0th element stores the character class description
- * in its textual form: used later (regexec.c:Perl_regclass_swash())
- * to initialize the appropriate swash (which gets stored in
- * the 1st element), and also useful for dumping the regnode.
- * The 2nd element stores the multicharacter foldings,
- * used later (regexec.c:S_reginclass()). */
- av_store(av, 0, listsv);
- av_store(av, 1, NULL);
- av_store(av, 2, MUTABLE_SV(unicode_alternate));
- rv = newRV_noinc(MUTABLE_SV(av));
- n = add_data(pRExC_state, 1, "s");
- RExC_rxi->data->data[n] = (void*)rv;
- ARG_SET(ret, n);
- }
- return ret;
-}
-#undef _C_C_T_
-
-
-/* reg_skipcomment()
-
- Absorbs an /x style # comments from the input stream.
- Returns true if there is more text remaining in the stream.
- Will set the REG_SEEN_RUN_ON_COMMENT flag if the comment
- terminates the pattern without including a newline.
-
- Note its the callers responsibility to ensure that we are
- actually in /x mode
-
-*/
-
-STATIC bool
-S_reg_skipcomment(pTHX_ RExC_state_t *pRExC_state)
-{
- bool ended = 0;
-
- PERL_ARGS_ASSERT_REG_SKIPCOMMENT;
-
- while (RExC_parse < RExC_end)
- if (*RExC_parse++ == '\n') {
- ended = 1;
- break;
- }
- if (!ended) {
- /* we ran off the end of the pattern without ending
- the comment, so we have to add an \n when wrapping */
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- return 0;
- } else
- return 1;
-}
-
-/* nextchar()
-
- Advance that parse position, and optionall absorbs
- "whitespace" from the inputstream.
-
- Without /x "whitespace" means (?#...) style comments only,
- with /x this means (?#...) and # comments and whitespace proper.
-
- Returns the RExC_parse point from BEFORE the scan occurs.
-
- This is the /x friendly way of saying RExC_parse++.
-*/
-
-STATIC char*
-S_nextchar(pTHX_ RExC_state_t *pRExC_state)
-{
- char* const retval = RExC_parse++;
-
- PERL_ARGS_ASSERT_NEXTCHAR;
-
- for (;;) {
- if (*RExC_parse == '(' && RExC_parse[1] == '?' &&
- RExC_parse[2] == '#') {
- while (*RExC_parse != ')') {
- if (RExC_parse == RExC_end)
- FAIL("Sequence (?#... not terminated");
- RExC_parse++;
- }
- RExC_parse++;
- continue;
- }
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if (isSPACE(*RExC_parse)) {
- RExC_parse++;
- continue;
- }
- else if (*RExC_parse == '#') {
- if ( reg_skipcomment( pRExC_state ) )
- continue;
- }
- }
- return retval;
- }
-}
-
-/*
-- reg_node - emit a node
-*/
-STATIC regnode * /* Location. */
-S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 1;
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE(ptr, op);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s:%d: (op %s) %s %"UVuf" (len %"UVuf") (max %"UVuf").\n",
- "reg_node", __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(RExC_emit, RExC_parse + (op == END));
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reganode - emit a node with an argument
-*/
-STATIC regnode * /* Location. */
-S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGANODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 2;
- /*
- We can't do this:
-
- assert(2==regarglen[op]+1);
-
- Anything larger than this has to allocate the extra amount.
- If we changed this to be:
-
- RExC_size += (1 + regarglen[op]);
-
- then it wouldn't matter. Its not clear what side effect
- might come from that so its not done so far.
- -- dmq
- */
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE_ARG(ptr, op, arg);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reganode",
- __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] ?
- "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Cur_Node_Offset;
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reguni - emit (if appropriate) a Unicode character
-*/
-STATIC STRLEN
-S_reguni(pTHX_ const RExC_state_t *pRExC_state, UV uv, char* s)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGUNI;
-
- return SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s);
-}
-
-/*
-- reginsert - insert an operator in front of already-emitted operand
-*
-* Means relocating the operand.
-*/
-STATIC void
-S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd, U32 depth)
-{
- dVAR;
- register regnode *src;
- register regnode *dst;
- register regnode *place;
- const int offset = regarglen[(U8)op];
- const int size = NODE_STEP_REGNODE + offset;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGINSERT;
- PERL_UNUSED_ARG(depth);
-/* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */
- DEBUG_PARSE_FMT("inst"," - %s",PL_reg_name[op]);
- if (SIZE_ONLY) {
- RExC_size += size;
- return;
- }
-
- src = RExC_emit;
- RExC_emit += size;
- dst = RExC_emit;
- if (RExC_open_parens) {
- int paren;
- /*DEBUG_PARSE_FMT("inst"," - %"IVdf, (IV)RExC_npar);*/
- for ( paren=0 ; paren < RExC_npar ; paren++ ) {
- if ( RExC_open_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("open"," - %d",size);*/
- RExC_open_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("open"," - %s","ok");*/
- }
- if ( RExC_close_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("close"," - %d",size);*/
- RExC_close_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("close"," - %s","ok");*/
- }
- }
- }
-
- while (src > opnd) {
- StructCopy(--src, --dst, regnode);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD 20010112 */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s copy %"UVuf" -> %"UVuf" (max %"UVuf").\n",
- "reg_insert",
- __LINE__,
- PL_reg_name[op],
- (UV)(dst - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(src - RExC_emit_start),
- (UV)(dst - RExC_emit_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src));
- Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src));
- }
-#endif
- }
-
-
- place = opnd; /* Op node, where operand used to be. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reginsert",
- __LINE__,
- PL_reg_name[op],
- (UV)(place - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(place - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(place, RExC_parse);
- Set_Node_Length(place, 1);
- }
-#endif
- src = NEXTOPER(place);
- FILL_ADVANCE_NODE(place, op);
- Zero(src, offset, regnode);
-}
-
-/*
-- regtail - set the next-pointer at the end of a node chain of p to val.
-- SEE ALSO: regtail_study
-*/
-/* TODO: All three parms should be const */
-STATIC void
-S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- if (SIZE_ONLY)
- return;
-
- /* Find last node. */
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tail" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) %s %s\n",
- SvPV_nolen_const(mysv), REG_NODE_NUM(scan),
- (temp == NULL ? "->" : ""),
- (temp == NULL ? PL_reg_name[OP(val)] : "")
- );
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
-
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-}
-
-#ifdef DEBUGGING
-/*
-- regtail_study - set the next-pointer at the end of a node chain of p to val.
-- Look for optimizable sequences at the same time.
-- currently only looks for EXACT chains.
-
-This is expermental code. The idea is to use this routine to perform
-in place optimizations on branches and groups as they are constructed,
-with the long term intention of removing optimization from study_chunk so
-that it is purely analytical.
-
-Currently only used when in DEBUG mode. The macro REGTAIL_STUDY() is used
-to control which is which.
-
-*/
-/* TODO: All four parms should be const */
-
-STATIC U8
-S_regtail_study(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- U8 exact = PSEUDO;
-#ifdef EXPERIMENTAL_INPLACESCAN
- I32 min = 0;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL_STUDY;
-
-
- if (SIZE_ONLY)
- return exact;
-
- /* Find last node. */
-
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (PL_regkind[OP(scan)] == EXACT)
- if (join_exact(pRExC_state,scan,&min,1,val,depth+1))
- return EXACT;
-#endif
- if ( exact ) {
- switch (OP(scan)) {
- case EXACT:
- case EXACTF:
- case EXACTFL:
- if( exact == PSEUDO )
- exact= OP(scan);
- else if ( exact != OP(scan) )
- exact= 0;
- case NOTHING:
- break;
- default:
- exact= 0;
- }
- }
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tsdy" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) -> %s\n",
- SvPV_nolen_const(mysv),
- REG_NODE_NUM(scan),
- PL_reg_name[exact]);
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
- DEBUG_PARSE_r({
- SV * const mysv_val=sv_newmortal();
- DEBUG_PARSE_MSG("");
- regprop(RExC_rx, mysv_val, val);
- PerlIO_printf(Perl_debug_log, "~ attach to %s (%"IVdf") offset to %"IVdf"\n",
- SvPV_nolen_const(mysv_val),
- (IV)REG_NODE_NUM(val),
- (IV)(val - scan)
- );
- });
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-
- return exact;
-}
-#endif
-
-/*
- - regcurly - a little FSA that accepts {\d+,?\d*}
- */
-STATIC I32
-S_regcurly(register const char *s)
-{
- PERL_ARGS_ASSERT_REGCURLY;
-
- if (*s++ != '{')
- return FALSE;
- if (!isDIGIT(*s))
- return FALSE;
- while (isDIGIT(*s))
- s++;
- if (*s == ',')
- s++;
- while (isDIGIT(*s))
- s++;
- if (*s != '}')
- return FALSE;
- return TRUE;
-}
-
-
-/*
- - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form
- */
-#ifdef DEBUGGING
-static void
-S_regdump_extflags(pTHX_ const char *lead, const U32 flags)
-{
- int bit;
- int set=0;
-
- for (bit=0; bit<32; bit++) {
- if (flags & (1<<bit)) {
- if (!set++ && lead)
- PerlIO_printf(Perl_debug_log, "%s",lead);
- PerlIO_printf(Perl_debug_log, "%s ",PL_reg_extflags_name[bit]);
- }
- }
- if (lead) {
- if (set)
- PerlIO_printf(Perl_debug_log, "\n");
- else
- PerlIO_printf(Perl_debug_log, "%s[none-set]\n",lead);
- }
-}
-#endif
-
-void
-Perl_regdump(pTHX_ const regexp *r)
-{
-#ifdef DEBUGGING
- dVAR;
- SV * const sv = sv_newmortal();
- SV *dsv= sv_newmortal();
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGDUMP;
-
- (void)dumpuntil(r, ri->program, ri->program + 1, NULL, NULL, sv, 0, 0);
-
- /* Header fields of interest. */
- if (r->anchored_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->anchored_substr),
- RE_SV_DUMPLEN(r->anchored_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_substr),
- (IV)r->anchored_offset);
- } else if (r->anchored_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->anchored_utf8),
- RE_SV_DUMPLEN(r->anchored_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored utf8 %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_utf8),
- (IV)r->anchored_offset);
- }
- if (r->float_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->float_substr),
- RE_SV_DUMPLEN(r->float_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "floating %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_substr),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- } else if (r->float_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->float_utf8),
- RE_SV_DUMPLEN(r->float_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "floating utf8 %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_utf8),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- }
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log,
- (const char *)
- (r->check_substr == r->float_substr
- && r->check_utf8 == r->float_utf8
- ? "(checking floating" : "(checking anchored"));
- if (r->extflags & RXf_NOSCAN)
- PerlIO_printf(Perl_debug_log, " noscan");
- if (r->extflags & RXf_CHECK_ALL)
- PerlIO_printf(Perl_debug_log, " isall");
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log, ") ");
-
- if (ri->regstclass) {
- regprop(r, sv, ri->regstclass);
- PerlIO_printf(Perl_debug_log, "stclass %s ", SvPVX_const(sv));
- }
- if (r->extflags & RXf_ANCH) {
- PerlIO_printf(Perl_debug_log, "anchored");
- if (r->extflags & RXf_ANCH_BOL)
- PerlIO_printf(Perl_debug_log, "(BOL)");
- if (r->extflags & RXf_ANCH_MBOL)
- PerlIO_printf(Perl_debug_log, "(MBOL)");
- if (r->extflags & RXf_ANCH_SBOL)
- PerlIO_printf(Perl_debug_log, "(SBOL)");
- if (r->extflags & RXf_ANCH_GPOS)
- PerlIO_printf(Perl_debug_log, "(GPOS)");
- PerlIO_putc(Perl_debug_log, ' ');
- }
- if (r->extflags & RXf_GPOS_SEEN)
- PerlIO_printf(Perl_debug_log, "GPOS:%"UVuf" ", (UV)r->gofs);
- if (r->intflags & PREGf_SKIP)
- PerlIO_printf(Perl_debug_log, "plus ");
- if (r->intflags & PREGf_IMPLICIT)
- PerlIO_printf(Perl_debug_log, "implicit ");
- PerlIO_printf(Perl_debug_log, "minlen %"IVdf" ", (IV)r->minlen);
- if (r->extflags & RXf_EVAL_SEEN)
- PerlIO_printf(Perl_debug_log, "with eval ");
- PerlIO_printf(Perl_debug_log, "\n");
- DEBUG_FLAGS_r(regdump_extflags("r->extflags: ",r->extflags));
-#else
- PERL_ARGS_ASSERT_REGDUMP;
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(r);
-#endif /* DEBUGGING */
-}
-
-/*
-- regprop - printable representation of opcode
-*/
-#define EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags) \
-STMT_START { \
- if (do_sep) { \
- Perl_sv_catpvf(aTHX_ sv,"%s][%s",PL_colors[1],PL_colors[0]); \
- if (flags & ANYOF_INVERT) \
- /*make sure the invert info is in each */ \
- sv_catpvs(sv, "^"); \
- do_sep = 0; \
- } \
-} STMT_END
-
-void
-Perl_regprop(pTHX_ const regexp *prog, SV *sv, const regnode *o)
-{
-#ifdef DEBUGGING
- dVAR;
- register int k;
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPROP;
-
- sv_setpvs(sv, "");
-
- if (OP(o) > REGNODE_MAX) /* regnode.type is unsigned */
- /* It would be nice to FAIL() here, but this may be called from
- regexec.c, and it would be hard to supply pRExC_state. */
- Perl_croak(aTHX_ "Corrupted regexp opcode %d > %d", (int)OP(o), (int)REGNODE_MAX);
- sv_catpv(sv, PL_reg_name[OP(o)]); /* Take off const! */
-
- k = PL_regkind[OP(o)];
-
- if (k == EXACT) {
- sv_catpvs(sv, " ");
- /* Using is_utf8_string() (via PERL_PV_UNI_DETECT)
- * is a crude hack but it may be the best for now since
- * we have no flag "this EXACTish node was UTF-8"
- * --jhi */
- pv_pretty(sv, STRING(o), STR_LEN(o), 60, PL_colors[0], PL_colors[1],
- PERL_PV_ESCAPE_UNI_DETECT |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT |
- PERL_PV_PRETTY_NOCLEAR
- );
- } else if (k == TRIE) {
- /* print the details of the trie in dumpuntil instead, as
- * progi->data isn't available here */
- const char op = OP(o);
- const U32 n = ARG(o);
- const reg_ac_data * const ac = IS_TRIE_AC(op) ?
- (reg_ac_data *)progi->data->data[n] :
- NULL;
- const reg_trie_data * const trie
- = (reg_trie_data*)progi->data->data[!IS_TRIE_AC(op) ? n : ac->trie];
-
- Perl_sv_catpvf(aTHX_ sv, "-%s",PL_reg_name[o->flags]);
- DEBUG_TRIE_COMPILE_r(
- Perl_sv_catpvf(aTHX_ sv,
- "<S:%"UVuf"/%"IVdf" W:%"UVuf" L:%"UVuf"/%"UVuf" C:%"UVuf"/%"UVuf">",
- (UV)trie->startstate,
- (IV)trie->statecount-1, /* -1 because of the unused 0 element */
- (UV)trie->wordcount,
- (UV)trie->minlen,
- (UV)trie->maxlen,
- (UV)TRIE_CHARCOUNT(trie),
- (UV)trie->uniquecharcount
- )
- );
- if ( IS_ANYOF_TRIE(op) || trie->bitmap ) {
- int i;
- int rangestart = -1;
- U8* bitmap = IS_ANYOF_TRIE(op) ? (U8*)ANYOF_BITMAP(o) : (U8*)TRIE_BITMAP(trie);
- sv_catpvs(sv, "[");
- for (i = 0; i <= 256; i++) {
- if (i < 256 && BITMAP_TEST(bitmap,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- rangestart = -1;
- }
- }
- sv_catpvs(sv, "]");
- }
-
- } else if (k == CURLY) {
- if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */
- Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o));
- }
- else if (k == WHILEM && o->flags) /* Ordinal/of */
- Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4);
- else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP || OP(o)==ACCEPT) {
- Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */
- if ( RXp_PAREN_NAMES(prog) ) {
- if ( k != REF || OP(o) < NREF) {
- AV *list= MUTABLE_AV(progi->data->data[progi->name_list_idx]);
- SV **name= av_fetch(list, ARG(o), 0 );
- if (name)
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- else {
- AV *list= MUTABLE_AV(progi->data->data[ progi->name_list_idx ]);
- SV *sv_dat= MUTABLE_SV(progi->data->data[ ARG( o ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
- SV **name= av_fetch(list, nums[0], 0 );
- I32 n;
- if (name) {
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- Perl_sv_catpvf(aTHX_ sv, "%s%"IVdf,
- (n ? "," : ""), (IV)nums[n]);
- }
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- }
- }
- } else if (k == GOSUB)
- Perl_sv_catpvf(aTHX_ sv, "%d[%+d]", (int)ARG(o),(int)ARG2L(o)); /* Paren and offset */
- else if (k == VERB) {
- if (!o->flags)
- Perl_sv_catpvf(aTHX_ sv, ":%"SVf,
- SVfARG((MUTABLE_SV(progi->data->data[ ARG( o ) ]))));
- } else if (k == LOGICAL)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */
- else if (k == FOLDCHAR)
- Perl_sv_catpvf(aTHX_ sv, "[0x%"UVXf"]", PTR2UV(ARG(o)) );
- else if (k == ANYOF) {
- int i, rangestart = -1;
- const U8 flags = ANYOF_FLAGS(o);
- int do_sep = 0;
-
- /* Should be synchronized with * ANYOF_ #xdefines in regcomp.h */
- static const char * const anyofs[] = {
- "\\w",
- "\\W",
- "\\s",
- "\\S",
- "\\d",
- "\\D",
- "[:alnum:]",
- "[:^alnum:]",
- "[:alpha:]",
- "[:^alpha:]",
- "[:ascii:]",
- "[:^ascii:]",
- "[:cntrl:]",
- "[:^cntrl:]",
- "[:graph:]",
- "[:^graph:]",
- "[:lower:]",
- "[:^lower:]",
- "[:print:]",
- "[:^print:]",
- "[:punct:]",
- "[:^punct:]",
- "[:upper:]",
- "[:^upper:]",
- "[:xdigit:]",
- "[:^xdigit:]",
- "[:space:]",
- "[:^space:]",
- "[:blank:]",
- "[:^blank:]"
- };
-
- if (flags & ANYOF_LOCALE)
- sv_catpvs(sv, "{loc}");
- if (flags & ANYOF_FOLD)
- sv_catpvs(sv, "{i}");
- Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]);
- if (flags & ANYOF_INVERT)
- sv_catpvs(sv, "^");
-
- /* output what the standard cp 0-255 bitmap matches */
- for (i = 0; i <= 256; i++) {
- if (i < 256 && ANYOF_BITMAP_TEST(o,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- do_sep = 1;
- rangestart = -1;
- }
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
- /* output any special charclass tests (used mostly under use locale) */
- if (o->flags & ANYOF_CLASS)
- for (i = 0; i < (int)(sizeof(anyofs)/sizeof(char*)); i++)
- if (ANYOF_CLASS_TEST(o,i)) {
- sv_catpv(sv, anyofs[i]);
- do_sep = 1;
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
-
- /* output information about the unicode matching */
- if (flags & ANYOF_UNICODE)
- sv_catpvs(sv, "{unicode}");
- else if (flags & ANYOF_UNICODE_ALL)
- sv_catpvs(sv, "{unicode_all}");
-
- {
- SV *lv;
- SV * const sw = regclass_swash(prog, o, FALSE, &lv, 0);
-
- if (lv) {
- if (sw) {
- U8 s[UTF8_MAXBYTES_CASE+1];
-
- for (i = 0; i <= 256; i++) { /* just the first 256 */
- uvchr_to_utf8(s, i);
-
- if (i < 256 && swash_fetch(sw, s, TRUE)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++) {
- const U8 * const e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for(p = s; p < e; p++)
- put_byte(sv, *p);
- }
- else {
- const U8 *e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- sv_catpvs(sv, "-");
- e = uvchr_to_utf8(s, i-1);
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- }
- rangestart = -1;
- }
- }
-
- sv_catpvs(sv, "..."); /* et cetera */
- }
-
- {
- char *s = savesvpv(lv);
- char * const origs = s;
-
- while (*s && *s != '\n')
- s++;
-
- if (*s == '\n') {
- const char * const t = ++s;
-
- while (*s) {
- if (*s == '\n')
- *s = ' ';
- s++;
- }
- if (s[-1] == ' ')
- s[-1] = 0;
-
- sv_catpv(sv, t);
- }
-
- Safefree(origs);
- }
- }
- }
-
- Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]);
- }
- else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH))
- Perl_sv_catpvf(aTHX_ sv, "[%d]", -(o->flags));
-#else
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(sv);
- PERL_UNUSED_ARG(o);
- PERL_UNUSED_ARG(prog);
-#endif /* DEBUGGING */
-}
-
-SV *
-Perl_re_intuit_string(pTHX_ REGEXP * const r)
-{ /* Assume that RE_INTUIT is set */
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_STRING;
- PERL_UNUSED_CONTEXT;
-
- DEBUG_COMPILE_r(
- {
- const char * const s = SvPV_nolen_const(prog->check_substr
- ? prog->check_substr : prog->check_utf8);
-
- if (!PL_colorset) reginitcolors();
- PerlIO_printf(Perl_debug_log,
- "%sUsing REx %ssubstr:%s \"%s%.60s%s%s\"\n",
- PL_colors[4],
- prog->check_substr ? "" : "utf8 ",
- PL_colors[5],PL_colors[0],
- s,
- PL_colors[1],
- (strlen(s) > 60 ? "..." : ""));
- } );
-
- return prog->check_substr ? prog->check_substr : prog->check_utf8;
-}
-
-/*
- pregfree()
-
- handles refcounting and freeing the perl core regexp structure. When
- it is necessary to actually free the structure the first thing it
- does is call the 'free' method of the regexp_engine associated to to
- the regexp, allowing the handling of the void *pprivate; member
- first. (This routine is not overridable by extensions, which is why
- the extensions free is called first.)
-
- See regdupe and regdupe_internal if you change anything here.
-*/
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_pregfree(pTHX_ REGEXP *r)
-{
- SvREFCNT_dec(r);
-}
-
-void
-Perl_pregfree2(pTHX_ REGEXP *rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_PREGFREE2;
-
- if (r->mother_re) {
- ReREFCNT_dec(r->mother_re);
- } else {
- CALLREGFREE_PVT(rx); /* free the private data */
- SvREFCNT_dec(RXp_PAREN_NAMES(r));
- }
- if (r->substrs) {
- SvREFCNT_dec(r->anchored_substr);
- SvREFCNT_dec(r->anchored_utf8);
- SvREFCNT_dec(r->float_substr);
- SvREFCNT_dec(r->float_utf8);
- Safefree(r->substrs);
- }
- RX_MATCH_COPY_FREE(rx);
-#ifdef PERL_OLD_COPY_ON_WRITE
- SvREFCNT_dec(r->saved_copy);
-#endif
- Safefree(r->offs);
-}
-
-/* reg_temp_copy()
-
- This is a hacky workaround to the structural issue of match results
- being stored in the regexp structure which is in turn stored in
- PL_curpm/PL_reg_curpm. The problem is that due to qr// the pattern
- could be PL_curpm in multiple contexts, and could require multiple
- result sets being associated with the pattern simultaneously, such
- as when doing a recursive match with (??{$qr})
-
- The solution is to make a lightweight copy of the regexp structure
- when a qr// is returned from the code executed by (??{$qr}) this
- lightweight copy doesnt actually own any of its data except for
- the starp/end and the actual regexp structure itself.
-
-*/
-
-
-REGEXP *
-Perl_reg_temp_copy (pTHX_ REGEXP *ret_x, REGEXP *rx)
-{
- struct regexp *ret;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- register const I32 npar = r->nparens+1;
-
- PERL_ARGS_ASSERT_REG_TEMP_COPY;
-
- if (!ret_x)
- ret_x = (REGEXP*) newSV_type(SVt_REGEXP);
- ret = (struct regexp *)SvANY(ret_x);
-
- (void)ReREFCNT_inc(rx);
- /* We can take advantage of the existing "copied buffer" mechanism in SVs
- by pointing directly at the buffer, but flagging that the allocated
- space in the copy is zero. As we've just done a struct copy, it's now
- a case of zero-ing that, rather than copying the current length. */
- SvPV_set(ret_x, RX_WRAPPED(rx));
- SvFLAGS(ret_x) |= SvFLAGS(rx) & (SVf_POK|SVp_POK|SVf_UTF8);
- memcpy(&(ret->xpv_cur), &(r->xpv_cur),
- sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur));
- SvLEN_set(ret_x, 0);
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if (r->substrs) {
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- SvREFCNT_inc_void(ret->anchored_substr);
- SvREFCNT_inc_void(ret->anchored_utf8);
- SvREFCNT_inc_void(ret->float_substr);
- SvREFCNT_inc_void(ret->float_utf8);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
- }
- RX_MATCH_COPIED_off(ret_x);
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
- ret->mother_re = rx;
-
- return ret_x;
-}
-#endif
-
-/* regfree_internal()
-
- Free the private data in a regexp. This is overloadable by
- extensions. Perl takes care of the regexp structure in pregfree(),
- this covers the *pprivate pointer which technically perldoesnt
- know about, however of course we have to handle the
- regexp_internal structure when no extension is in use.
-
- Note this is called before freeing anything in the regexp
- structure.
- */
-
-void
-Perl_regfree_internal(pTHX_ REGEXP * const rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGFREE_INTERNAL;
-
- DEBUG_COMPILE_r({
- if (!PL_colorset)
- reginitcolors();
- {
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RX_UTF8(rx),
- dsv, RX_PRECOMP(rx), RX_PRELEN(rx), 60);
- PerlIO_printf(Perl_debug_log,"%sFreeing REx:%s %s\n",
- PL_colors[4],PL_colors[5],s);
- }
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets)
- Safefree(ri->u.offsets); /* 20010421 MJD */
-#endif
- if (ri->data) {
- int n = ri->data->count;
- PAD* new_comppad = NULL;
- PAD* old_comppad;
- PADOFFSET refcnt;
-
- while (--n >= 0) {
- /* If you add a ->what type here, update the comment in regcomp.h */
- switch (ri->data->what[n]) {
- case 's':
- case 'S':
- case 'u':
- SvREFCNT_dec(MUTABLE_SV(ri->data->data[n]));
- break;
- case 'f':
- Safefree(ri->data->data[n]);
- break;
- case 'p':
- new_comppad = MUTABLE_AV(ri->data->data[n]);
- break;
- case 'o':
- if (new_comppad == NULL)
- Perl_croak(aTHX_ "panic: pregfree comppad");
- PAD_SAVE_LOCAL(old_comppad,
- /* Watch out for global destruction's random ordering. */
- (SvTYPE(new_comppad) == SVt_PVAV) ? new_comppad : NULL
- );
- OP_REFCNT_LOCK;
- refcnt = OpREFCNT_dec((OP_4tree*)ri->data->data[n]);
- OP_REFCNT_UNLOCK;
- if (!refcnt)
- op_free((OP_4tree*)ri->data->data[n]);
-
- PAD_RESTORE_LOCAL(old_comppad);
- SvREFCNT_dec(MUTABLE_SV(new_comppad));
- new_comppad = NULL;
- break;
- case 'n':
- break;
- case 'T':
- { /* Aho Corasick add-on structure for a trie node.
- Used in stclass optimization only */
- U32 refcount;
- reg_ac_data *aho=(reg_ac_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --aho->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(aho->states);
- PerlMemShared_free(aho->fail);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- PerlMemShared_free(ri->regstclass);
- }
- }
- break;
- case 't':
- {
- /* trie structure. */
- U32 refcount;
- reg_trie_data *trie=(reg_trie_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --trie->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(trie->charmap);
- PerlMemShared_free(trie->states);
- PerlMemShared_free(trie->trans);
- if (trie->bitmap)
- PerlMemShared_free(trie->bitmap);
- if (trie->wordlen)
- PerlMemShared_free(trie->wordlen);
- if (trie->jump)
- PerlMemShared_free(trie->jump);
- if (trie->nextword)
- PerlMemShared_free(trie->nextword);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- }
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: regfree data code '%c'", ri->data->what[n]);
- }
- }
- Safefree(ri->data->what);
- Safefree(ri->data);
- }
-
- Safefree(ri);
-}
-
-#define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
-#define av_dup_inc(s,t) MUTABLE_AV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define hv_dup_inc(s,t) MUTABLE_HV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define SAVEPVN(p,n) ((p) ? savepvn(p,n) : NULL)
-
-/*
- re_dup - duplicate a regexp.
-
- This routine is expected to clone a given regexp structure. It is only
- compiled under USE_ITHREADS.
-
- After all of the core data stored in struct regexp is duplicated
- the regexp_engine.dupe method is used to copy any private data
- stored in the *pprivate pointer. This allows extensions to handle
- any duplication it needs to do.
-
- See pregfree() and regfree_internal() if you change anything here.
-*/
-#if defined(USE_ITHREADS)
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_re_dup_guts(pTHX_ const REGEXP *sstr, REGEXP *dstr, CLONE_PARAMS *param)
-{
- dVAR;
- I32 npar;
- const struct regexp *r = (const struct regexp *)SvANY(sstr);
- struct regexp *ret = (struct regexp *)SvANY(dstr);
-
- PERL_ARGS_ASSERT_RE_DUP_GUTS;
-
- npar = r->nparens+1;
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if(ret->swap) {
- /* no need to copy these */
- Newx(ret->swap, npar, regexp_paren_pair);
- }
-
- if (ret->substrs) {
- /* Do it this way to avoid reading from *r after the StructCopy().
- That way, if any of the sv_dup_inc()s dislodge *r from the L1
- cache, it doesn't matter. */
- const bool anchored = r->check_substr
- ? r->check_substr == r->anchored_substr
- : r->check_utf8 == r->anchored_utf8;
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- ret->anchored_substr = sv_dup_inc(ret->anchored_substr, param);
- ret->anchored_utf8 = sv_dup_inc(ret->anchored_utf8, param);
- ret->float_substr = sv_dup_inc(ret->float_substr, param);
- ret->float_utf8 = sv_dup_inc(ret->float_utf8, param);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
-
- if (ret->check_substr) {
- if (anchored) {
- assert(r->check_utf8 == r->anchored_utf8);
- ret->check_substr = ret->anchored_substr;
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- assert(r->check_substr == r->float_substr);
- assert(r->check_utf8 == r->float_utf8);
- ret->check_substr = ret->float_substr;
- ret->check_utf8 = ret->float_utf8;
- }
- } else if (ret->check_utf8) {
- if (anchored) {
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- ret->check_utf8 = ret->float_utf8;
- }
- }
- }
-
- RXp_PAREN_NAMES(ret) = hv_dup_inc(RXp_PAREN_NAMES(ret), param);
-
- if (ret->pprivate)
- RXi_SET(ret,CALLREGDUPE_PVT(dstr,param));
-
- if (RX_MATCH_COPIED(dstr))
- ret->subbeg = SAVEPVN(ret->subbeg, ret->sublen);
- else
- ret->subbeg = NULL;
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
-
- if (ret->mother_re) {
- if (SvPVX_const(dstr) == SvPVX_const(ret->mother_re)) {
- /* Our storage points directly to our mother regexp, but that's
- 1: a buffer in a different thread
- 2: something we no longer hold a reference on
- so we need to copy it locally. */
- /* Note we need to sue SvCUR() on our mother_re, because it, in
- turn, may well be pointing to its own mother_re. */
- SvPV_set(dstr, SAVEPVN(SvPVX_const(ret->mother_re),
- SvCUR(ret->mother_re)+1));
- SvLEN_set(dstr, SvCUR(ret->mother_re)+1);
- }
- ret->mother_re = NULL;
- }
- ret->gofs = 0;
-}
-#endif /* PERL_IN_XSUB_RE */
-
-/*
- regdupe_internal()
-
- This is the internal complement to regdupe() which is used to copy
- the structure pointed to by the *pprivate pointer in the regexp.
- This is the core version of the extension overridable cloning hook.
- The regexp structure being duplicated will be copied by perl prior
- to this and will be provided as the regexp *r argument, however
- with the /old/ structures pprivate pointer value. Thus this routine
- may override any copying normally done by perl.
-
- It returns a pointer to the new regexp_internal structure.
-*/
-
-void *
-Perl_regdupe_internal(pTHX_ REGEXP * const rx, CLONE_PARAMS *param)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- regexp_internal *reti;
- int len, npar;
- RXi_GET_DECL(r,ri);
-
- PERL_ARGS_ASSERT_REGDUPE_INTERNAL;
-
- npar = r->nparens+1;
- len = ProgLen(ri);
-
- Newxc(reti, sizeof(regexp_internal) + len*sizeof(regnode), char, regexp_internal);
- Copy(ri->program, reti->program, len+1, regnode);
-
-
- reti->regstclass = NULL;
-
- if (ri->data) {
- struct reg_data *d;
- const int count = ri->data->count;
- int i;
-
- Newxc(d, sizeof(struct reg_data) + count*sizeof(void *),
- char, struct reg_data);
- Newx(d->what, count, U8);
-
- d->count = count;
- for (i = 0; i < count; i++) {
- d->what[i] = ri->data->what[i];
- switch (d->what[i]) {
- /* legal options are one of: sSfpontTu
- see also regcomp.h and pregfree() */
- case 's':
- case 'S':
- case 'p': /* actually an AV, but the dup function is identical. */
- case 'u': /* actually an HV, but the dup function is identical. */
- d->data[i] = sv_dup_inc((const SV *)ri->data->data[i], param);
- break;
- case 'f':
- /* This is cheating. */
- Newx(d->data[i], 1, struct regnode_charclass_class);
- StructCopy(ri->data->data[i], d->data[i],
- struct regnode_charclass_class);
- reti->regstclass = (regnode*)d->data[i];
- break;
- case 'o':
- /* Compiled op trees are readonly and in shared memory,
- and can thus be shared without duplication. */
- OP_REFCNT_LOCK;
- d->data[i] = (void*)OpREFCNT_inc((OP*)ri->data->data[i]);
- OP_REFCNT_UNLOCK;
- break;
- case 'T':
- /* Trie stclasses are readonly and can thus be shared
- * without duplication. We free the stclass in pregfree
- * when the corresponding reg_ac_data struct is freed.
- */
- reti->regstclass= ri->regstclass;
- /* Fall through */
- case 't':
- OP_REFCNT_LOCK;
- ((reg_trie_data*)ri->data->data[i])->refcount++;
- OP_REFCNT_UNLOCK;
- /* Fall through */
- case 'n':
- d->data[i] = ri->data->data[i];
- break;
- default:
- Perl_croak(aTHX_ "panic: re_dup unknown data code '%c'", ri->data->what[i]);
- }
- }
-
- reti->data = d;
- }
- else
- reti->data = NULL;
-
- reti->name_list_idx = ri->name_list_idx;
-
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets) {
- Newx(reti->u.offsets, 2*len+1, U32);
- Copy(ri->u.offsets, reti->u.offsets, 2*len+1, U32);
- }
-#else
- SetProgLen(reti,len);
-#endif
-
- return (void*)reti;
-}
-
-#endif /* USE_ITHREADS */
-
-#ifndef PERL_IN_XSUB_RE
-
-/*
- - regnext - dig the "next" pointer out of a node
- */
-regnode *
-Perl_regnext(pTHX_ register regnode *p)
-{
- dVAR;
- register I32 offset;
-
- if (!p)
- return(NULL);
-
- offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p));
- if (offset == 0)
- return(NULL);
-
- return(p+offset);
-}
-#endif
-
-STATIC void
-S_re_croak2(pTHX_ const char* pat1,const char* pat2,...)
-{
- va_list args;
- STRLEN l1 = strlen(pat1);
- STRLEN l2 = strlen(pat2);
- char buf[512];
- SV *msv;
- const char *message;
-
- PERL_ARGS_ASSERT_RE_CROAK2;
-
- if (l1 > 510)
- l1 = 510;
- if (l1 + l2 > 510)
- l2 = 510 - l1;
- Copy(pat1, buf, l1 , char);
- Copy(pat2, buf + l1, l2 , char);
- buf[l1 + l2] = '\n';
- buf[l1 + l2 + 1] = '\0';
-#ifdef I_STDARG
- /* ANSI variant takes additional second argument */
- va_start(args, pat2);
-#else
- va_start(args);
-#endif
- msv = vmess(buf, &args);
- va_end(args);
- message = SvPV_const(msv,l1);
- if (l1 > 512)
- l1 = 512;
- Copy(message, buf, l1 , char);
- buf[l1-1] = '\0'; /* Overwrite \n */
- Perl_croak(aTHX_ "%s", buf);
-}
-
-/* XXX Here's a total kludge. But we need to re-enter for swash routines. */
-
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_save_re_context(pTHX)
-{
- dVAR;
-
- struct re_save_state *state;
-
- SAVEVPTR(PL_curcop);
- SSGROW(SAVESTACK_ALLOC_FOR_RE_SAVE_STATE + 1);
-
- state = (struct re_save_state *)(PL_savestack + PL_savestack_ix);
- PL_savestack_ix += SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
- SSPUSHINT(SAVEt_RE_STATE);
-
- Copy(&PL_reg_state, state, 1, struct re_save_state);
-
- PL_reg_start_tmp = 0;
- PL_reg_start_tmpl = 0;
- PL_reg_oldsaved = NULL;
- PL_reg_oldsavedlen = 0;
- PL_reg_maxiter = 0;
- PL_reg_leftiter = 0;
- PL_reg_poscache = NULL;
- PL_reg_poscache_size = 0;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = NULL;
-#endif
-
- /* Save $1..$n (#18107: UTF-8 s/(\w+)/uc($1)/e); AMS 20021106. */
- if (PL_curpm) {
- const REGEXP * const rx = PM_GETRE(PL_curpm);
- if (rx) {
- U32 i;
- for (i = 1; i <= RX_NPARENS(rx); i++) {
- char digits[TYPE_CHARS(long)];
- const STRLEN len = my_snprintf(digits, sizeof(digits), "%lu", (long)i);
- GV *const *const gvp
- = (GV**)hv_fetch(PL_defstash, digits, len, 0);
-
- if (gvp) {
- GV * const gv = *gvp;
- if (SvTYPE(gv) == SVt_PVGV && GvSV(gv))
- save_scalar(gv);
- }
- }
- }
- }
-}
-#endif
-
-static void
-clear_re(pTHX_ void *r)
-{
- dVAR;
- ReREFCNT_dec((REGEXP *)r);
-}
-
-#ifdef DEBUGGING
-
-STATIC void
-S_put_byte(pTHX_ SV *sv, int c)
-{
- PERL_ARGS_ASSERT_PUT_BYTE;
-
- /* Our definition of isPRINT() ignores locales, so only bytes that are
- not part of UTF-8 are considered printable. I assume that the same
- holds for UTF-EBCDIC.
- Also, code point 255 is not printable in either (it's E0 in EBCDIC,
- which Wikipedia says:
-
- EO, or Eight Ones, is an 8-bit EBCDIC character code represented as all
- ones (binary 1111 1111, hexadecimal FF). It is similar, but not
- identical, to the ASCII delete (DEL) or rubout control character.
- ) So the old condition can be simplified to !isPRINT(c) */
- if (!isPRINT(c))
- Perl_sv_catpvf(aTHX_ sv, "\\%o", c);
- else {
- const char string = c;
- if (c == '-' || c == ']' || c == '\\' || c == '^')
- sv_catpvs(sv, "\\");
- sv_catpvn(sv, &string, 1);
- }
-}
-
-
-#define CLEAR_OPTSTART \
- if (optstart) STMT_START { \
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log, " (%"IVdf" nodes)\n", (IV)(node - optstart))); \
- optstart=NULL; \
- } STMT_END
-
-#define DUMPUNTIL(b,e) CLEAR_OPTSTART; node=dumpuntil(r,start,(b),(e),last,sv,indent+1,depth+1);
-
-STATIC const regnode *
-S_dumpuntil(pTHX_ const regexp *r, const regnode *start, const regnode *node,
- const regnode *last, const regnode *plast,
- SV* sv, I32 indent, U32 depth)
-{
- dVAR;
- register U8 op = PSEUDO; /* Arbitrary non-END op. */
- register const regnode *next;
- const regnode *optstart= NULL;
-
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMPUNTIL;
-
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d : %d - %d - %d\n",indent,node-start,
- last ? last-start : 0,plast ? plast-start : 0);
-#endif
-
- if (plast && plast < last)
- last= plast;
-
- while (PL_regkind[op] != END && (!last || node < last)) {
- /* While that wasn't END last time... */
- NODE_ALIGN(node);
- op = OP(node);
- if (op == CLOSE || op == WHILEM)
- indent--;
- next = regnext((regnode *)node);
-
- /* Where, what. */
- if (OP(node) == OPTIMIZED) {
- if (!optstart && RE_DEBUG_FLAG(RE_DEBUG_COMPILE_OPTIMISE))
- optstart = node;
- else
- goto after_print;
- } else
- CLEAR_OPTSTART;
-
- regprop(r, sv, node);
- PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start),
- (int)(2*indent + 1), "", SvPVX_const(sv));
-
- if (OP(node) != OPTIMIZED) {
- if (next == NULL) /* Next ptr. */
- PerlIO_printf(Perl_debug_log, " (0)");
- else if (PL_regkind[(U8)op] == BRANCH && PL_regkind[OP(next)] != BRANCH )
- PerlIO_printf(Perl_debug_log, " (FAIL)");
- else
- PerlIO_printf(Perl_debug_log, " (%"IVdf")", (IV)(next - start));
- (void)PerlIO_putc(Perl_debug_log, '\n');
- }
-
- after_print:
- if (PL_regkind[(U8)op] == BRANCHJ) {
- assert(next);
- {
- register const regnode *nnode = (OP(next) == LONGJMP
- ? regnext((regnode *)next)
- : next);
- if (last && nnode > last)
- nnode = last;
- DUMPUNTIL(NEXTOPER(NEXTOPER(node)), nnode);
- }
- }
- else if (PL_regkind[(U8)op] == BRANCH) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node), next);
- }
- else if ( PL_regkind[(U8)op] == TRIE ) {
- const regnode *this_trie = node;
- const char op = OP(node);
- const U32 n = ARG(node);
- const reg_ac_data * const ac = op>=AHOCORASICK ?
- (reg_ac_data *)ri->data->data[n] :
- NULL;
- const reg_trie_data * const trie =
- (reg_trie_data*)ri->data->data[op<AHOCORASICK ? n : ac->trie];
-#ifdef DEBUGGING
- AV *const trie_words = MUTABLE_AV(ri->data->data[n + TRIE_WORDS_OFFSET]);
-#endif
- const regnode *nextbranch= NULL;
- I32 word_idx;
- sv_setpvs(sv, "");
- for (word_idx= 0; word_idx < (I32)trie->wordcount; word_idx++) {
- SV ** const elem_ptr = av_fetch(trie_words,word_idx,0);
-
- PerlIO_printf(Perl_debug_log, "%*s%s ",
- (int)(2*(indent+3)), "",
- elem_ptr ? pv_pretty(sv, SvPV_nolen_const(*elem_ptr), SvCUR(*elem_ptr), 60,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*elem_ptr) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT
- )
- : "???"
- );
- if (trie->jump) {
- U16 dist= trie->jump[word_idx+1];
- PerlIO_printf(Perl_debug_log, "(%"UVuf")\n",
- (UV)((dist ? this_trie + dist : next) - start));
- if (dist) {
- if (!nextbranch)
- nextbranch= this_trie + trie->jump[0];
- DUMPUNTIL(this_trie + dist, nextbranch);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode *)nextbranch);
- } else {
- PerlIO_printf(Perl_debug_log, "\n");
- }
- }
- if (last && next > last)
- node= last;
- else
- node= next;
- }
- else if ( op == CURLY ) { /* "next" might be very big: optimizer */
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS,
- NEXTOPER(node) + EXTRA_STEP_2ARGS + 1);
- }
- else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, next);
- }
- else if ( op == PLUS || op == STAR) {
- DUMPUNTIL(NEXTOPER(node), NEXTOPER(node) + 1);
- }
- else if (op == ANYOF) {
- /* arglen 1 + class block */
- node += 1 + ((ANYOF_FLAGS(node) & ANYOF_LARGE)
- ? ANYOF_CLASS_SKIP : ANYOF_SKIP);
- node = NEXTOPER(node);
- }
- else if (PL_regkind[(U8)op] == EXACT) {
- /* Literal string, where present. */
- node += NODE_SZ_STR(node) - 1;
- node = NEXTOPER(node);
- }
- else {
- node = NEXTOPER(node);
- node += regarglen[(U8)op];
- }
- if (op == CURLYX || op == OPEN)
- indent++;
- }
- CLEAR_OPTSTART;
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d\n", (int)indent);
-#endif
- return node;
-}
-
-#endif /* DEBUGGING */
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regexec.c
- */
-
-/*
- * One Ring to rule them all, One Ring to find them
- &
- * [p.v of _The Lord of the Rings_, opening poem]
- * [p.50 of _The Lord of the Rings_, I/iii: "The Shadow of the Past"]
- * [p.254 of _The Lord of the Rings_, II/ii: "The Council of Elrond"]
- */
-
-/* This file contains functions for executing a regular expression. See
- * also regcomp.c which funnily enough, contains functions for compiling
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_exec.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGEXEC_C
-#include "perl.h"
-
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#define RF_tainted 1 /* tainted information used? */
-#define RF_warned 2 /* warned about big count? */
-
-#define RF_utf8 8 /* Pattern contains multibyte chars? */
-
-#define UTF ((PL_reg_flags & RF_utf8) != 0)
-
-#define RS_init 1 /* eval environment created */
-#define RS_set 2 /* replsv value is set */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-#define REGINCLASS(prog,p,c) (ANYOF_FLAGS(p) ? reginclass(prog,p,c,0,0) : ANYOF_BITMAP_TEST(p,*(c)))
-
-/*
- * Forwards.
- */
-
-#define CHR_SVLEN(sv) (do_utf8 ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (PL_reg_match_utf8 ? utf8_distance(a,b) : a - b)
-
-#define HOPc(pos,off) \
- (char *)(PL_reg_match_utf8 \
- ? reghop3((U8*)pos, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)) \
- : (U8*)(pos + off))
-#define HOPBACKc(pos, off) \
- (char*)(PL_reg_match_utf8\
- ? reghopmaybe3((U8*)pos, -off, (U8*)PL_bostr) \
- : (pos - off >= PL_bostr) \
- ? (U8*)pos - off \
- : NULL)
-
-#define HOP3(pos,off,lim) (PL_reg_match_utf8 ? reghop3((U8*)(pos), off, (U8*)(lim)) : (U8*)(pos + off))
-#define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim))
-
-/* these are unrolled below in the CCC_TRY_XXX defined */
-#define LOAD_UTF8_CHARCLASS(class,str) STMT_START { \
- if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)str); assert(ok); LEAVE; } } STMT_END
-
-/* Doesn't do an assert to verify that is correct */
-#define LOAD_UTF8_CHARCLASS_NO_CHECK(class) STMT_START { \
- if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)" "); LEAVE; } } STMT_END
-
-#define LOAD_UTF8_CHARCLASS_ALNUM() LOAD_UTF8_CHARCLASS(alnum,"a")
-#define LOAD_UTF8_CHARCLASS_DIGIT() LOAD_UTF8_CHARCLASS(digit,"0")
-#define LOAD_UTF8_CHARCLASS_SPACE() LOAD_UTF8_CHARCLASS(space," ")
-
-#define LOAD_UTF8_CHARCLASS_GCB() /* Grapheme cluster boundaries */ \
- LOAD_UTF8_CHARCLASS(X_begin, " "); \
- LOAD_UTF8_CHARCLASS(X_non_hangul, "A"); \
- /* These are utf8 constants, and not utf-ebcdic constants, so the \
- * assert should likely and hopefully fail on an EBCDIC machine */ \
- LOAD_UTF8_CHARCLASS(X_extend, "\xcc\x80"); /* U+0300 */ \
- \
- /* No asserts are done for these, in case called on an early \
- * Unicode version in which they map to nothing */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_prepend);/* U+0E40 "\xe0\xb9\x80" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_L); /* U+1100 "\xe1\x84\x80" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_LV); /* U+AC00 "\xea\xb0\x80" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_LVT); /* U+AC01 "\xea\xb0\x81" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_LV_LVT_V);/* U+AC01 "\xea\xb0\x81" */\
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_T); /* U+11A8 "\xe1\x86\xa8" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_V) /* U+1160 "\xe1\x85\xa0" */
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS_ALNUM()
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS_SPACE()
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS_DIGIT()
-#define RE_utf8_perl_word PL_utf8_alnum
-#define RE_utf8_perl_space PL_utf8_space
-#define RE_utf8_posix_digit PL_utf8_digit
-#define perl_word alnum
-#define perl_space space
-#define posix_digit digit
-#else
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS(perl_word,"a")
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS(perl_space," ")
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS(posix_digit,"0")
-#define RE_utf8_perl_word PL_utf8_perl_word
-#define RE_utf8_perl_space PL_utf8_perl_space
-#define RE_utf8_posix_digit PL_utf8_posix_digit
-#endif
-
-
-#define CCC_TRY_AFF(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME: \
- if (!nextchr) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if (!(OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if (!(OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-#define CCC_TRY_NEG(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME : \
- if (!nextchr && locinput >= PL_regeol) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if ((OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if ((OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-
-
-
-
-/* TODO: Combine JUMPABLE and HAS_TEXT to cache OP(rn) */
-
-/* for use after a quantifier and before an EXACT-like node -- japhy */
-/* it would be nice to rework regcomp.sym to generate this stuff. sigh */
-#define JUMPABLE(rn) ( \
- OP(rn) == OPEN || \
- (OP(rn) == CLOSE && (!cur_eval || cur_eval->u.eval.close_paren != ARG(rn))) || \
- OP(rn) == EVAL || \
- OP(rn) == SUSPEND || OP(rn) == IFMATCH || \
- OP(rn) == PLUS || OP(rn) == MINMOD || \
- OP(rn) == KEEPS || (PL_regkind[OP(rn)] == VERB) || \
- (PL_regkind[OP(rn)] == CURLY && ARG1(rn) > 0) \
-)
-#define IS_EXACT(rn) (PL_regkind[OP(rn)] == EXACT)
-
-#define HAS_TEXT(rn) ( IS_EXACT(rn) || PL_regkind[OP(rn)] == REF )
-
-#if 0
-/* Currently these are only used when PL_regkind[OP(rn)] == EXACT so
- we don't need this definition. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT || OP(rn)==REF || OP(rn)==NREF )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF || OP(rn)==REFF || OP(rn)==NREFF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL || OP(rn)==REFFL || OP(rn)==NREFFL )
-
-#else
-/* ... so we use this as its faster. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL )
-
-#endif
-
-/*
- Search for mandatory following text node; for lookahead, the text must
- follow but for lookbehind (rn->flags != 0) we skip to the next step.
-*/
-#define FIND_NEXT_IMPT(rn) STMT_START { \
- while (JUMPABLE(rn)) { \
- const OPCODE type = OP(rn); \
- if (type == SUSPEND || PL_regkind[type] == CURLY) \
- rn = NEXTOPER(NEXTOPER(rn)); \
- else if (type == PLUS) \
- rn = NEXTOPER(rn); \
- else if (type == IFMATCH) \
- rn = (rn->flags == 0) ? NEXTOPER(NEXTOPER(rn)) : rn + ARG(rn); \
- else rn += NEXT_OFF(rn); \
- } \
-} STMT_END
-
-
-static void restore_pos(pTHX_ void *arg);
-
-STATIC CHECKPOINT
-S_regcppush(pTHX_ I32 parenfloor)
-{
- dVAR;
- const int retval = PL_savestack_ix;
-#define REGCP_PAREN_ELEMS 4
- const int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS;
- int p;
- GET_RE_DEBUG_FLAGS_DECL;
-
- if (paren_elems_to_push < 0)
- Perl_croak(aTHX_ "panic: paren_elems_to_push < 0");
-
-#define REGCP_OTHER_ELEMS 7
- SSGROW(paren_elems_to_push + REGCP_OTHER_ELEMS);
-
- for (p = PL_regsize; p > parenfloor; p--) {
-/* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */
- SSPUSHINT(PL_regoffs[p].end);
- SSPUSHINT(PL_regoffs[p].start);
- SSPUSHPTR(PL_reg_start_tmp[p]);
- SSPUSHINT(p);
- DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log,
- " saving \\%"UVuf" %"IVdf"(%"IVdf")..%"IVdf"\n",
- (UV)p, (IV)PL_regoffs[p].start,
- (IV)(PL_reg_start_tmp[p] - PL_bostr),
- (IV)PL_regoffs[p].end
- ));
- }
-/* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */
- SSPUSHPTR(PL_regoffs);
- SSPUSHINT(PL_regsize);
- SSPUSHINT(*PL_reglastparen);
- SSPUSHINT(*PL_reglastcloseparen);
- SSPUSHPTR(PL_reginput);
-#define REGCP_FRAME_ELEMS 2
-/* REGCP_FRAME_ELEMS are part of the REGCP_OTHER_ELEMS and
- * are needed for the regexp context stack bookkeeping. */
- SSPUSHINT(paren_elems_to_push + REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- SSPUSHINT(SAVEt_REGCONTEXT); /* Magic cookie. */
-
- return retval;
-}
-
-/* These are needed since we do not localize EVAL nodes: */
-#define REGCP_SET(cp) \
- DEBUG_STATE_r( \
- PerlIO_printf(Perl_debug_log, \
- " Setting an EVAL scope, savestack=%"IVdf"\n", \
- (IV)PL_savestack_ix)); \
- cp = PL_savestack_ix
-
-#define REGCP_UNWIND(cp) \
- DEBUG_STATE_r( \
- if (cp != PL_savestack_ix) \
- PerlIO_printf(Perl_debug_log, \
- " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \
- (IV)(cp), (IV)PL_savestack_ix)); \
- regcpblow(cp)
-
-STATIC char *
-S_regcppop(pTHX_ const regexp *rex)
-{
- dVAR;
- U32 i;
- char *input;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCPPOP;
-
- /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */
- i = SSPOPINT;
- assert(i == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */
- i = SSPOPINT; /* Parentheses elements to pop. */
- input = (char *) SSPOPPTR;
- *PL_reglastcloseparen = SSPOPINT;
- *PL_reglastparen = SSPOPINT;
- PL_regsize = SSPOPINT;
- PL_regoffs=(regexp_paren_pair *) SSPOPPTR;
-
-
- /* Now restore the parentheses context. */
- for (i -= (REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- i > 0; i -= REGCP_PAREN_ELEMS) {
- I32 tmps;
- U32 paren = (U32)SSPOPINT;
- PL_reg_start_tmp[paren] = (char *) SSPOPPTR;
- PL_regoffs[paren].start = SSPOPINT;
- tmps = SSPOPINT;
- if (paren <= *PL_reglastparen)
- PL_regoffs[paren].end = tmps;
- DEBUG_BUFFERS_r(
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n",
- (UV)paren, (IV)PL_regoffs[paren].start,
- (IV)(PL_reg_start_tmp[paren] - PL_bostr),
- (IV)PL_regoffs[paren].end,
- (paren > *PL_reglastparen ? "(no)" : ""));
- );
- }
- DEBUG_BUFFERS_r(
- if (*PL_reglastparen + 1 <= rex->nparens) {
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"IVdf"..\\%"IVdf" to undef\n",
- (IV)(*PL_reglastparen + 1), (IV)rex->nparens);
- }
- );
-#if 1
- /* It would seem that the similar code in regtry()
- * already takes care of this, and in fact it is in
- * a better location to since this code can #if 0-ed out
- * but the code in regtry() is needed or otherwise tests
- * requiring null fields (pat.t#187 and split.t#{13,14}
- * (as of patchlevel 7877) will fail. Then again,
- * this code seems to be necessary or otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * --jhi updated by dapm */
- for (i = *PL_reglastparen + 1; i <= rex->nparens; i++) {
- if (i > PL_regsize)
- PL_regoffs[i].start = -1;
- PL_regoffs[i].end = -1;
- }
-#endif
- return input;
-}
-
-#define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */
-
-/*
- * pregexec and friends
- */
-
-#ifndef PERL_IN_XSUB_RE
-/*
- - pregexec - match a regexp against a string
- */
-I32
-Perl_pregexec(pTHX_ REGEXP * const prog, char* stringarg, register char *strend,
- char *strbeg, I32 minend, SV *screamer, U32 nosave)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* nosave: For optimizations. */
-{
- PERL_ARGS_ASSERT_PREGEXEC;
-
- return
- regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL,
- nosave ? 0 : REXEC_COPY_STR);
-}
-#endif
-
-/*
- * Need to implement the following flags for reg_anch:
- *
- * USE_INTUIT_NOML - Useful to call re_intuit_start() first
- * USE_INTUIT_ML
- * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer
- * INTUIT_AUTORITATIVE_ML
- * INTUIT_ONCE_NOML - Intuit can match in one location only.
- * INTUIT_ONCE_ML
- *
- * Another flag for this function: SECOND_TIME (so that float substrs
- * with giant delta may be not rechecked).
- */
-
-/* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */
-
-/* If SCREAM, then SvPVX_const(sv) should be compatible with strpos and strend.
- Otherwise, only SvCUR(sv) is used to get strbeg. */
-
-/* XXXX We assume that strpos is strbeg unless sv. */
-
-/* XXXX Some places assume that there is a fixed substring.
- An update may be needed if optimizer marks as "INTUITable"
- RExen without fixed substrings. Similarly, it is assumed that
- lengths of all the strings are no more than minlen, thus they
- cannot come from lookahead.
- (Or minlen should take into account lookahead.)
- NOTE: Some of this comment is not correct. minlen does now take account
- of lookahead/behind. Further research is required. -- demerphq
-
-*/
-
-/* A failure to find a constant substring means that there is no need to make
- an expensive call to REx engine, thus we celebrate a failure. Similarly,
- finding a substring too deep into the string means that less calls to
- regtry() should be needed.
-
- REx compiler's optimizer found 4 possible hints:
- a) Anchored substring;
- b) Fixed substring;
- c) Whether we are anchored (beginning-of-line or \G);
- d) First node (of those at offset 0) which may distingush positions;
- We use a)b)d) and multiline-part of c), and try to find a position in the
- string which does not contradict any of them.
- */
-
-/* Most of decisions we do here should have been done at compile time.
- The nodes of the REx which we used for the search should have been
- deleted from the finite automaton. */
-
-char *
-Perl_re_intuit_start(pTHX_ REGEXP * const rx, SV *sv, char *strpos,
- char *strend, const U32 flags, re_scream_pos_data *data)
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- register I32 start_shift = 0;
- /* Should be nonnegative! */
- register I32 end_shift = 0;
- register char *s;
- register SV *check;
- char *strbeg;
- char *t;
- const bool do_utf8 = (sv && SvUTF8(sv)) ? 1 : 0; /* if no sv we have to assume bytes */
- I32 ml_anch;
- register char *other_last = NULL; /* other substr checked before this */
- char *check_at = NULL; /* check substr found at this pos */
- const I32 multiline = prog->extflags & RXf_PMf_MULTILINE;
- RXi_GET_DECL(prog,progi);
-#ifdef DEBUGGING
- const char * const i_strpos = strpos;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_START;
-
- RX_MATCH_UTF8_set(rx,do_utf8);
-
- if (RX_UTF8(rx)) {
- PL_reg_flags |= RF_utf8;
- }
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, strpos, strend,
- sv ? "Guessing start of match in sv for"
- : "Guessing start of match in string for");
- );
-
- /* CHR_DIST() would be more correct here but it makes things slow. */
- if (prog->minlen > strend - strpos) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short... [re_intuit_start]\n"));
- goto fail;
- }
-
- strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos;
- PL_regeol = strend;
- if (do_utf8) {
- if (!prog->check_utf8 && prog->check_substr)
- to_utf8_substr(prog);
- check = prog->check_utf8;
- } else {
- if (!prog->check_substr && prog->check_utf8)
- to_byte_substr(prog);
- check = prog->check_substr;
- }
- if (check == &PL_sv_undef) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Non-utf8 string cannot match utf8 check string\n"));
- goto fail;
- }
- if (prog->extflags & RXf_ANCH) { /* Match at beg-of-str or after \n */
- ml_anch = !( (prog->extflags & RXf_ANCH_SINGLE)
- || ( (prog->extflags & RXf_ANCH_BOL)
- && !multiline ) ); /* Check after \n? */
-
- if (!ml_anch) {
- if ( !(prog->extflags & RXf_ANCH_GPOS) /* Checked by the caller */
- && !(prog->intflags & PREGf_IMPLICIT) /* not a real BOL */
- /* SvCUR is not set on references: SvRV and SvPVX_const overlap */
- && sv && !SvROK(sv)
- && (strpos != strbeg)) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not at start...\n"));
- goto fail;
- }
- if (prog->check_offset_min == prog->check_offset_max &&
- !(prog->extflags & RXf_CANY_SEEN)) {
- /* Substring at constant offset from beg-of-str... */
- I32 slen;
-
- s = HOP3c(strpos, prog->check_offset_min, strend);
-
- if (SvTAIL(check)) {
- slen = SvCUR(check); /* >= 1 */
-
- if ( strend - s > slen || strend - s < slen - 1
- || (strend - s == slen && strend[-1] != '\n')) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String too long...\n"));
- goto fail_finish;
- }
- /* Now should match s[0..slen-2] */
- slen--;
- if (slen && (*SvPVX_const(check) != *s
- || (slen > 1
- && memNE(SvPVX_const(check), s, slen)))) {
- report_neq:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String not equal...\n"));
- goto fail_finish;
- }
- }
- else if (*SvPVX_const(check) != *s
- || ((slen = SvCUR(check)) > 1
- && memNE(SvPVX_const(check), s, slen)))
- goto report_neq;
- check_at = s;
- goto success_at_start;
- }
- }
- /* Match is anchored, but substr is not anchored wrt beg-of-str. */
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- if (!ml_anch) {
- const I32 end = prog->check_offset_max + CHR_SVLEN(check)
- - (SvTAIL(check) != 0);
- const I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end;
-
- if (end_shift < eshift)
- end_shift = eshift;
- }
- }
- else { /* Can match at random position */
- ml_anch = 0;
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- /* end shift should be non negative here */
- }
-
-#ifdef QDEBUGGING /* 7/99: reports of failure (with the older version) */
- if (end_shift < 0)
- Perl_croak(aTHX_ "panic: end_shift: %"IVdf" pattern:\n%s\n ",
- (IV)end_shift, RX_PRECOMP(prog));
-#endif
-
- restart:
- /* Find a possible match in the region s..strend by looking for
- the "check" substring in the region corrected by start/end_shift. */
-
- {
- I32 srch_start_shift = start_shift;
- I32 srch_end_shift = end_shift;
- if (srch_start_shift < 0 && strbeg - s > srch_start_shift) {
- srch_end_shift -= ((strbeg - s) - srch_start_shift);
- srch_start_shift = strbeg - s;
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "Check offset min: %"IVdf" Start shift: %"IVdf" End shift %"IVdf" Real End Shift: %"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)srch_start_shift,
- (IV)srch_end_shift,
- (IV)prog->check_end_shift);
- });
-
- if (flags & REXEC_SCREAM) {
- I32 p = -1; /* Internal iterator of scream. */
- I32 * const pp = data ? data->scream_pos : &p;
-
- if (PL_screamfirst[BmRARE(check)] >= 0
- || ( BmRARE(check) == '\n'
- && (BmPREVIOUS(check) == SvCUR(check) - 1)
- && SvTAIL(check) ))
- s = screaminstr(sv, check,
- srch_start_shift + (s - strbeg), srch_end_shift, pp, 0);
- else
- goto fail_finish;
- /* we may be pointing at the wrong string */
- if (s && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- if (data)
- *data->scream_olds = s;
- }
- else {
- U8* start_point;
- U8* end_point;
- if (prog->extflags & RXf_CANY_SEEN) {
- start_point= (U8*)(s + srch_start_shift);
- end_point= (U8*)(strend - srch_end_shift);
- } else {
- start_point= HOP3(s, srch_start_shift, srch_start_shift < 0 ? strbeg : strend);
- end_point= HOP3(strend, -srch_end_shift, strbeg);
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "fbm_instr len=%d str=<%.*s>\n",
- (int)(end_point - start_point),
- (int)(end_point - start_point) > 20 ? 20 : (int)(end_point - start_point),
- start_point);
- });
-
- s = fbm_instr( start_point, end_point,
- check, multiline ? FBMrf_MULTILINE : 0);
- }
- }
- /* Update the count-of-usability, remove useless subpatterns,
- unshift s. */
-
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(check), RE_SV_DUMPLEN(check), 30);
- PerlIO_printf(Perl_debug_log, "%s %s substr %s%s%s",
- (s ? "Found" : "Did not find"),
- (check == (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)
- ? "anchored" : "floating"),
- quoted,
- RE_SV_TAIL(check),
- (s ? " at offset " : "...\n") );
- });
-
- if (!s)
- goto fail_finish;
- /* Finish the diagnostic message */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) );
-
- /* XXX dmq: first branch is for positive lookbehind...
- Our check string is offset from the beginning of the pattern.
- So we need to do any stclass tests offset forward from that
- point. I think. :-(
- */
-
-
-
- check_at=s;
-
-
- /* Got a candidate. Check MBOL anchoring, and the *other* substr.
- Start with the other substr.
- XXXX no SCREAM optimization yet - and a very coarse implementation
- XXXX /ttx+/ results in anchored="ttx", floating="x". floating will
- *always* match. Probably should be marked during compile...
- Probably it is right to do no SCREAM here...
- */
-
- if (do_utf8 ? (prog->float_utf8 && prog->anchored_utf8)
- : (prog->float_substr && prog->anchored_substr))
- {
- /* Take into account the "other" substring. */
- /* XXXX May be hopelessly wrong for UTF... */
- if (!other_last)
- other_last = strpos;
- if (check == (do_utf8 ? prog->float_utf8 : prog->float_substr)) {
- do_other_anchored:
- {
- char * const last = HOP3c(s, -start_shift, strbeg);
- char *last1, *last2;
- char * const saved_s = s;
- SV* must;
-
- t = s - prog->check_offset_max;
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -(prog->check_offset_max), (U8*)strpos))
- && t > strpos)))
- NOOP;
- else
- t = strpos;
- t = HOP3c(t, prog->anchored_offset, strend);
- if (t < other_last) /* These positions already checked */
- t = other_last;
- last2 = last1 = HOP3c(strend, -prog->minlen, strbeg);
- if (last < last1)
- last1 = last;
- /* XXXX It is not documented what units *_offsets are in.
- We assume bytes, but this is clearly wrong.
- Meaning this code needs to be carefully reviewed for errors.
- dmq.
- */
-
- /* On end-of-str: see comment below. */
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->anchored_utf8); /* for debug */
- }
- else
- s = fbm_instr(
- (unsigned char*)t,
- HOP3(HOP3(last1, prog->anchored_offset, strend)
- + SvCUR(must), -(SvTAIL(must)!=0), strbeg),
- must,
- multiline ? FBMrf_MULTILINE : 0
- );
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s anchored substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
-
-
- if (!s) {
- if (last1 >= last2) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying floating at offset %ld...\n",
- (long)(HOP3c(saved_s, 1, strend) - i_strpos)));
- other_last = HOP3c(last1, prog->anchored_offset+1, strend);
- s = HOP3c(last, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- t = HOP3c(s, -prog->anchored_offset, strbeg);
- other_last = HOP3c(s, 1, strend);
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
- else { /* Take into account the floating substring. */
- char *last, *last1;
- char * const saved_s = s;
- SV* must;
-
- t = HOP3c(s, -start_shift, strbeg);
- last1 = last =
- HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg);
- if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset)
- last = HOP3c(t, prog->float_max_offset, strend);
- s = HOP3c(t, prog->float_min_offset, strend);
- if (s < other_last)
- s = other_last;
- /* XXXX It is not documented what units *_offsets are in. Assume bytes. */
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- /* fbm_instr() takes into account exact value of end-of-str
- if the check is SvTAIL(ed). Since false positives are OK,
- and end-of-str is not later than strend we are OK. */
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->float_utf8); /* for debug message */
- }
- else
- s = fbm_instr((unsigned char*)s,
- (unsigned char*)last + SvCUR(must)
- - (SvTAIL(must)!=0),
- must, multiline ? FBMrf_MULTILINE : 0);
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s floating substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
- if (!s) {
- if (last1 == last) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying anchored starting at offset %ld...\n",
- (long)(saved_s + 1 - i_strpos)));
- other_last = last;
- s = HOP3c(t, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- other_last = s; /* Fix this later. --Hugo */
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
-
-
- t= (char*)HOP3( s, -prog->check_offset_max, (prog->check_offset_max<0) ? strend : strpos);
-
- DEBUG_OPTIMISE_MORE_r(
- PerlIO_printf(Perl_debug_log,
- "Check offset min:%"IVdf" max:%"IVdf" S:%"IVdf" t:%"IVdf" D:%"IVdf" end:%"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)prog->check_offset_max,
- (IV)(s-strpos),
- (IV)(t-strpos),
- (IV)(t-s),
- (IV)(strend-strpos)
- )
- );
-
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -prog->check_offset_max, (U8*) ((prog->check_offset_max<0) ? strend : strpos)))
- && t > strpos)))
- {
- /* Fixed substring is found far enough so that the match
- cannot start at strpos. */
- try_at_offset:
- if (ml_anch && t[-1] != '\n') {
- /* Eventually fbm_*() should handle this, but often
- anchored_offset is not 0, so this check will not be wasted. */
- /* XXXX In the code below we prefer to look for "^" even in
- presence of anchored substrings. And we search even
- beyond the found float position. These pessimizations
- are historical artefacts only. */
- find_anchor:
- while (t < strend - prog->minlen) {
- if (*t == '\n') {
- if (t < check_at - prog->check_offset_min) {
- if (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) {
- /* Since we moved from the found position,
- we definitely contradict the found anchored
- substr. Due to the above check we do not
- contradict "check" substr.
- Thus we can arrive here only if check substr
- is float. Redo checking for "other"=="fixed".
- */
- strpos = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset)));
- goto do_other_anchored;
- }
- /* We don't contradict the found floating substring. */
- /* XXXX Why not check for STCLASS? */
- s = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(s - i_strpos)));
- goto set_useful;
- }
- /* Position contradicts check-string */
- /* XXXX probably better to look for check-string
- than for "\n", so one should lower the limit for t? */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t + 1 - i_strpos)));
- other_last = strpos = s = t + 1;
- goto restart;
- }
- t++;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- goto fail_finish;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- }
- s = t;
- set_useful:
- ++BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr); /* hooray/5 */
- }
- else {
- /* The found string does not prohibit matching at strpos,
- - no optimization of calling REx engine can be performed,
- unless it was an MBOL and we are not after MBOL,
- or a future STCLASS check will fail this. */
- try_at_start:
- /* Even in this situation we may use MBOL flag if strpos is offset
- wrt the start of the string. */
- if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */
- && (strpos != strbeg) && strpos[-1] != '\n'
- /* May be due to an implicit anchor of m{.*foo} */
- && !(prog->intflags & PREGf_IMPLICIT))
- {
- t = strpos;
- goto find_anchor;
- }
- DEBUG_EXECUTE_r( if (ml_anch)
- PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n",
- (long)(strpos - i_strpos), PL_colors[0], PL_colors[1]);
- );
- success_at_start:
- if (!(prog->intflags & PREGf_NAUGHTY) /* XXXX If strpos moved? */
- && (do_utf8 ? (
- prog->check_utf8 /* Could be deleted already */
- && --BmUSEFUL(prog->check_utf8) < 0
- && (prog->check_utf8 == prog->float_utf8)
- ) : (
- prog->check_substr /* Could be deleted already */
- && --BmUSEFUL(prog->check_substr) < 0
- && (prog->check_substr == prog->float_substr)
- )))
- {
- /* If flags & SOMETHING - do not do it many times on the same match */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n"));
- /* XXX Does the destruction order has to change with do_utf8? */
- SvREFCNT_dec(do_utf8 ? prog->check_utf8 : prog->check_substr);
- SvREFCNT_dec(do_utf8 ? prog->check_substr : prog->check_utf8);
- prog->check_substr = prog->check_utf8 = NULL; /* disable */
- prog->float_substr = prog->float_utf8 = NULL; /* clear */
- check = NULL; /* abort */
- s = strpos;
- /* XXXX This is a remnant of the old implementation. It
- looks wasteful, since now INTUIT can use many
- other heuristics. */
- prog->extflags &= ~RXf_USE_INTUIT;
- }
- else
- s = strpos;
- }
-
- /* Last resort... */
- /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */
- /* trie stclasses are too expensive to use here, we are better off to
- leave it to regmatch itself */
- if (progi->regstclass && PL_regkind[OP(progi->regstclass)]!=TRIE) {
- /* minlen == 0 is possible if regstclass is \b or \B,
- and the fixed substr is ''$.
- Since minlen is already taken into account, s+1 is before strend;
- accidentally, minlen >= 1 guaranties no false positives at s + 1
- even for \b or \B. But (minlen? 1 : 0) below assumes that
- regstclass does not come from lookahead... */
- /* If regstclass takes bytelength more than 1: If charlength==1, OK.
- This leaves EXACTF only, which is dealt with in find_byclass(). */
- const U8* const str = (U8*)STRING(progi->regstclass);
- const int cl_l = (PL_regkind[OP(progi->regstclass)] == EXACT
- ? CHR_DIST(str+STR_LEN(progi->regstclass), str)
- : 1);
- char * endpos;
- if (prog->anchored_substr || prog->anchored_utf8 || ml_anch)
- endpos= HOP3c(s, (prog->minlen ? cl_l : 0), strend);
- else if (prog->float_substr || prog->float_utf8)
- endpos= HOP3c(HOP3c(check_at, -start_shift, strbeg), cl_l, strend);
- else
- endpos= strend;
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %"IVdf" s: %"IVdf" endpos: %"IVdf"\n",
- (IV)start_shift, (IV)(check_at - strbeg), (IV)(s - strbeg), (IV)(endpos - strbeg)));
-
- t = s;
- s = find_byclass(prog, progi->regstclass, s, endpos, NULL);
- if (!s) {
-#ifdef DEBUGGING
- const char *what = NULL;
-#endif
- if (endpos == strend) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "This position contradicts STCLASS...\n") );
- if ((prog->extflags & RXf_ANCH) && !ml_anch)
- goto fail;
- /* Contradict one of substrings */
- if (prog->anchored_substr || prog->anchored_utf8) {
- if ((do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) == check) {
- DEBUG_EXECUTE_r( what = "anchored" );
- hop_and_restart:
- s = HOP3c(t, 1, strend);
- if (s + start_shift + end_shift > strend) {
- /* XXXX Should be taken into account earlier? */
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for %s substr starting at offset %ld...\n",
- what, (long)(s + start_shift - i_strpos)) );
- goto restart;
- }
- /* Have both, check_string is floating */
- if (t + start_shift >= check_at) /* Contradicts floating=check */
- goto retry_floating_check;
- /* Recheck anchored substring, but not floating... */
- s = check_at;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for anchored substr starting at offset %ld...\n",
- (long)(other_last - i_strpos)) );
- goto do_other_anchored;
- }
- /* Another way we could have checked stclass at the
- current position only: */
- if (ml_anch) {
- s = t = t + 1;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for /%s^%s/m starting at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t - i_strpos)) );
- goto try_at_offset;
- }
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) /* Could have been deleted */
- goto fail;
- /* Check is floating subtring. */
- retry_floating_check:
- t = check_at - start_shift;
- DEBUG_EXECUTE_r( what = "floating" );
- goto hop_and_restart;
- }
- if (t != s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "By STCLASS: moving %ld --> %ld\n",
- (long)(t - i_strpos), (long)(s - i_strpos))
- );
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Does not contradict STCLASS...\n");
- );
- }
- }
- giveup:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n",
- PL_colors[4], (check ? "Guessed" : "Giving up"),
- PL_colors[5], (long)(s - i_strpos)) );
- return s;
-
- fail_finish: /* Substring not found */
- if (prog->check_substr || prog->check_utf8) /* could be removed already */
- BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr) += 5; /* hooray */
- fail:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n",
- PL_colors[4], PL_colors[5]));
- return NULL;
-}
-
-#define DECL_TRIE_TYPE(scan) \
- const enum { trie_plain, trie_utf8, trie_utf8_fold, trie_latin_utf8_fold } \
- trie_type = (scan->flags != EXACT) \
- ? (do_utf8 ? trie_utf8_fold : (UTF ? trie_latin_utf8_fold : trie_plain)) \
- : (do_utf8 ? trie_utf8 : trie_plain)
-
-#define REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, uscan, len, \
-uvc, charid, foldlen, foldbuf, uniflags) STMT_START { \
- switch (trie_type) { \
- case trie_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_latin_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- len = 1; \
- uvc = to_uni_fold( *(U8*)uc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_utf8: \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- break; \
- case trie_plain: \
- uvc = (UV)*uc; \
- len = 1; \
- } \
- if (uvc < 256) { \
- charid = trie->charmap[ uvc ]; \
- } \
- else { \
- charid = 0; \
- if (widecharmap) { \
- SV** const svpp = hv_fetch(widecharmap, \
- (char*)&uvc, sizeof(UV), 0); \
- if (svpp) \
- charid = (U16)SvIV(*svpp); \
- } \
- } \
-} STMT_END
-
-#define REXEC_FBC_EXACTISH_CHECK(CoNd) \
-{ \
- char *my_strend= (char *)strend; \
- if ( (CoNd) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8, \
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- else { \
- U8 foldbuf[UTF8_MAXBYTES_CASE+1]; \
- uvchr_to_utf8(tmpbuf, c); \
- f = to_utf8_fold(tmpbuf, foldbuf, &foldlen); \
- if ( f != c \
- && (f == c1 || f == c2) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8,\
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- } \
-} \
-s += len
-
-#define REXEC_FBC_EXACTISH_SCAN(CoNd) \
-STMT_START { \
- while (s <= e) { \
- if ( (CoNd) \
- && (ln == 1 || !(OP(c) == EXACTF \
- ? ibcmp(s, m, ln) \
- : ibcmp_locale(s, m, ln))) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_SCAN(CoDe) \
-STMT_START { \
- while (s + (uskip = UTF8SKIP(s)) <= strend) { \
- CoDe \
- s += uskip; \
- } \
-} STMT_END
-
-#define REXEC_FBC_SCAN(CoDe) \
-STMT_START { \
- while (s < strend) { \
- CoDe \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_CLASS_SCAN(CoNd) \
-REXEC_FBC_UTF8_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_CLASS_SCAN(CoNd) \
-REXEC_FBC_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_TRYIT \
-if ((!reginfo || regtry(reginfo, &s))) \
- goto got_it
-
-#define REXEC_FBC_CSCAN(CoNdUtF8,CoNd) \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_PRELOAD(UtFpReLoAd,CoNdUtF8,CoNd) \
- if (do_utf8) { \
- UtFpReLoAd; \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_TAINT(CoNdUtF8,CoNd) \
- PL_reg_flags |= RF_tainted; \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define DUMP_EXEC_POS(li,s,doutf8) \
- dump_exec_pos(li,s,(PL_regeol),(PL_bostr),(PL_reg_starttry),doutf8)
-
-/* We know what class REx starts with. Try to find this position... */
-/* if reginfo is NULL, its a dryrun */
-/* annoyingly all the vars in this routine have different names from their counterparts
- in regmatch. /grrr */
-
-STATIC char *
-S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
- const char *strend, regmatch_info *reginfo)
-{
- dVAR;
- const I32 doevery = (prog->intflags & PREGf_SKIP) == 0;
- char *m;
- STRLEN ln;
- STRLEN lnc;
- register STRLEN uskip;
- unsigned int c1;
- unsigned int c2;
- char *e;
- register I32 tmp = 1; /* Scratch variable? */
- register const bool do_utf8 = PL_reg_match_utf8;
- RXi_GET_DECL(prog,progi);
-
- PERL_ARGS_ASSERT_FIND_BYCLASS;
-
- /* We know what class it must start with. */
- switch (OP(c)) {
- case ANYOF:
- if (do_utf8) {
- REXEC_FBC_UTF8_CLASS_SCAN((ANYOF_FLAGS(c) & ANYOF_UNICODE) ||
- !UTF8_IS_INVARIANT((U8)s[0]) ?
- reginclass(prog, c, (U8*)s, 0, do_utf8) :
- REGINCLASS(prog, c, (U8*)s));
- }
- else {
- while (s < strend) {
- STRLEN skip = 1;
-
- if (REGINCLASS(prog, c, (U8*)s) ||
- (ANYOF_FOLD_SHARP_S(c, s, strend) &&
- /* The assignment of 2 is intentional:
- * for the folded sharp s, the skip is 2. */
- (skip = SHARP_S_SKIP))) {
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += skip;
- }
- }
- break;
- case CANY:
- REXEC_FBC_SCAN(
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- );
- break;
- case EXACTF:
- m = STRING(c);
- ln = STR_LEN(c); /* length to match in octets/bytes */
- lnc = (I32) ln; /* length to match in characters */
- if (UTF) {
- STRLEN ulen1, ulen2;
- U8 *sm = (U8 *) m;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
- /* used by commented-out code below */
- /*const U32 uniflags = UTF8_ALLOW_DEFAULT;*/
-
- /* XXX: Since the node will be case folded at compile
- time this logic is a little odd, although im not
- sure that its actually wrong. --dmq */
-
- c1 = to_utf8_lower((U8*)m, tmpbuf1, &ulen1);
- c2 = to_utf8_upper((U8*)m, tmpbuf2, &ulen2);
-
- /* XXX: This is kinda strange. to_utf8_XYZ returns the
- codepoint of the first character in the converted
- form, yet originally we did the extra step.
- No tests fail by commenting this code out however
- so Ive left it out. -- dmq.
-
- c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- */
-
- lnc = 0;
- while (sm < ((U8 *) m + ln)) {
- lnc++;
- sm += UTF8SKIP(sm);
- }
- }
- else {
- c1 = *(U8*)m;
- c2 = PL_fold[c1];
- }
- goto do_exactf;
- case EXACTFL:
- m = STRING(c);
- ln = STR_LEN(c);
- lnc = (I32) ln;
- c1 = *(U8*)m;
- c2 = PL_fold_locale[c1];
- do_exactf:
- e = HOP3c(strend, -((I32)lnc), s);
-
- if (!reginfo && e < s)
- e = s; /* Due to minlen logic of intuit() */
-
- /* The idea in the EXACTF* cases is to first find the
- * first character of the EXACTF* node and then, if
- * necessary, case-insensitively compare the full
- * text of the node. The c1 and c2 are the first
- * characters (though in Unicode it gets a bit
- * more complicated because there are more cases
- * than just upper and lower: one needs to use
- * the so-called folding case for case-insensitive
- * matching (called "loose matching" in Unicode).
- * ibcmp_utf8() will do just that. */
-
- if (do_utf8 || UTF) {
- UV c, f;
- U8 tmpbuf [UTF8_MAXBYTES+1];
- STRLEN len = 1;
- STRLEN foldlen;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- if (c1 == c2) {
- /* Upper and lower of 1st char are equal -
- * probably not a "letter". */
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
- REXEC_FBC_EXACTISH_CHECK(c == c1);
- }
- }
- else {
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
-
- /* Handle some of the three Greek sigmas cases.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (the character class or ANYOF cases)
- * are handled during compiletime in
- * regexec.c:S_regclass(). */
- if (c == (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA ||
- c == (UV)UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA)
- c = (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA;
-
- REXEC_FBC_EXACTISH_CHECK(c == c1 || c == c2);
- }
- }
- }
- else {
- /* Neither pattern nor string are UTF8 */
- if (c1 == c2)
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1);
- else
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1 || *(U8*)s == c2);
- }
- break;
- case BOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == BOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == BOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- if ((!prog->minlen && tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NBOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == NBOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == NBOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == NBOUND ?
- isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- if ((!prog->minlen && !tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case ALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- isALNUM(*s)
- );
- case ALNUML:
- REXEC_FBC_CSCAN_TAINT(
- isALNUM_LC_utf8((U8*)s),
- isALNUM_LC(*s)
- );
- case NALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- !swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- !isALNUM(*s)
- );
- case NALNUML:
- REXEC_FBC_CSCAN_TAINT(
- !isALNUM_LC_utf8((U8*)s),
- !isALNUM_LC(*s)
- );
- case SPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- *s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8),
- isSPACE(*s)
- );
- case SPACEL:
- REXEC_FBC_CSCAN_TAINT(
- *s == ' ' || isSPACE_LC_utf8((U8*)s),
- isSPACE_LC(*s)
- );
- case NSPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- !(*s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8)),
- !isSPACE(*s)
- );
- case NSPACEL:
- REXEC_FBC_CSCAN_TAINT(
- !(*s == ' ' || isSPACE_LC_utf8((U8*)s)),
- !isSPACE_LC(*s)
- );
- case DIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- isDIGIT(*s)
- );
- case DIGITL:
- REXEC_FBC_CSCAN_TAINT(
- isDIGIT_LC_utf8((U8*)s),
- isDIGIT_LC(*s)
- );
- case NDIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- !swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- !isDIGIT(*s)
- );
- case NDIGITL:
- REXEC_FBC_CSCAN_TAINT(
- !isDIGIT_LC_utf8((U8*)s),
- !isDIGIT_LC(*s)
- );
- case LNBREAK:
- REXEC_FBC_CSCAN(
- is_LNBREAK_utf8(s),
- is_LNBREAK_latin1(s)
- );
- case VERTWS:
- REXEC_FBC_CSCAN(
- is_VERTWS_utf8(s),
- is_VERTWS_latin1(s)
- );
- case NVERTWS:
- REXEC_FBC_CSCAN(
- !is_VERTWS_utf8(s),
- !is_VERTWS_latin1(s)
- );
- case HORIZWS:
- REXEC_FBC_CSCAN(
- is_HORIZWS_utf8(s),
- is_HORIZWS_latin1(s)
- );
- case NHORIZWS:
- REXEC_FBC_CSCAN(
- !is_HORIZWS_utf8(s),
- !is_HORIZWS_latin1(s)
- );
- case AHOCORASICKC:
- case AHOCORASICK:
- {
- DECL_TRIE_TYPE(c);
- /* what trie are we using right now */
- reg_ac_data *aho
- = (reg_ac_data*)progi->data->data[ ARG( c ) ];
- reg_trie_data *trie
- = (reg_trie_data*)progi->data->data[ aho->trie ];
- HV *widecharmap = MUTABLE_HV(progi->data->data[ aho->trie + 1 ]);
-
- const char *last_start = strend - trie->minlen;
-#ifdef DEBUGGING
- const char *real_start = s;
-#endif
- STRLEN maxlen = trie->maxlen;
- SV *sv_points;
- U8 **points; /* map of where we were in the input string
- when reading a given char. For ASCII this
- is unnecessary overhead as the relationship
- is always 1:1, but for Unicode, especially
- case folded Unicode this is not true. */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- U8 *bitmap=NULL;
-
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- /* We can't just allocate points here. We need to wrap it in
- * an SV so it gets freed properly if there is a croak while
- * running the match */
- ENTER;
- SAVETMPS;
- sv_points=newSV(maxlen * sizeof(U8 *));
- SvCUR_set(sv_points,
- maxlen * sizeof(U8 *));
- SvPOK_on(sv_points);
- sv_2mortal(sv_points);
- points=(U8**)SvPV_nolen(sv_points );
- if ( trie_type != trie_utf8_fold
- && (trie->bitmap || OP(c)==AHOCORASICKC) )
- {
- if (trie->bitmap)
- bitmap=(U8*)trie->bitmap;
- else
- bitmap=(U8*)ANYOF_BITMAP(c);
- }
- /* this is the Aho-Corasick algorithm modified a touch
- to include special handling for long "unknown char"
- sequences. The basic idea being that we use AC as long
- as we are dealing with a possible matching char, when
- we encounter an unknown char (and we have not encountered
- an accepting state) we scan forward until we find a legal
- starting char.
- AC matching is basically that of trie matching, except
- that when we encounter a failing transition, we fall back
- to the current states "fail state", and try the current char
- again, a process we repeat until we reach the root state,
- state 1, or a legal transition. If we fail on the root state
- then we can either terminate if we have reached an accepting
- state previously, or restart the entire process from the beginning
- if we have not.
-
- */
- while (s <= last_start) {
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- U8 *uc = (U8*)s;
- U16 charid = 0;
- U32 base = 1;
- U32 state = 1;
- UV uvc = 0;
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- U8 *leftmost = NULL;
-#ifdef DEBUGGING
- U32 accepted_word= 0;
-#endif
- U32 pointpos = 0;
-
- while ( state && uc <= (U8*)strend ) {
- int failed=0;
- U32 word = aho->states[ state ].wordnum;
-
- if( state==1 ) {
- if ( bitmap ) {
- DEBUG_TRIE_EXECUTE_r(
- if ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- dump_exec_pos( (char *)uc, c, strend, real_start,
- (char *)uc, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- " Scanning for legal start char...\n");
- }
- );
- while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- uc++;
- }
- s= (char *)uc;
- }
- if (uc >(U8*)last_start) break;
- }
-
- if ( word ) {
- U8 *lpos= points[ (pointpos - trie->wordlen[word-1] ) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=word);
- leftmost= lpos;
- }
- if (base==0) break;
-
- }
- points[pointpos++ % maxlen]= uc;
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
- DEBUG_TRIE_EXECUTE_r({
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf(Perl_debug_log,
- " Charid:%3u CP:%4"UVxf" ",
- charid, uvc);
- });
-
- do {
-#ifdef DEBUGGING
- word = aho->states[ state ].wordnum;
-#endif
- base = aho->states[ state ].trans.base;
-
- DEBUG_TRIE_EXECUTE_r({
- if (failed)
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%sState: %4"UVxf", word=%"UVxf,
- failed ? " Fail transition to " : "",
- (UV)state, (UV)word);
- });
- if ( base ) {
- U32 tmp;
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state
- && (tmp=trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next))
- {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - legal\n"));
- state = tmp;
- break;
- }
- else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - fail\n"));
- failed = 1;
- state = aho->fail[state];
- }
- }
- else {
- /* we must be accepting here */
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - accepting\n"));
- failed = 1;
- break;
- }
- } while(state);
- uc += len;
- if (failed) {
- if (leftmost)
- break;
- if (!state) state = 1;
- }
- }
- if ( aho->states[ state ].wordnum ) {
- U8 *lpos = points[ (pointpos - trie->wordlen[aho->states[ state ].wordnum-1]) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=aho->states[ state ].wordnum);
- leftmost = lpos;
- }
- }
- if (leftmost) {
- s = (char*)leftmost;
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf(
- Perl_debug_log,"Matches word #%"UVxf" at position %"IVdf". Trying full pattern...\n",
- (UV)accepted_word, (IV)(s - real_start)
- );
- });
- if (!reginfo || regtry(reginfo, &s)) {
- FREETMPS;
- LEAVE;
- goto got_it;
- }
- s = HOPc(s,1);
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,"Pattern failed. Looking for new start point...\n");
- });
- } else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,"No match.\n"));
- break;
- }
- }
- FREETMPS;
- LEAVE;
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c));
- break;
- }
- return 0;
- got_it:
- return s;
-}
-
-
-/*
- - regexec_flags - match a regexp against a string
- */
-I32
-Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, register char *strend,
- char *strbeg, I32 minend, SV *sv, void *data, U32 flags)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* data: May be used for some additional optimizations.
- Currently its only used, with a U32 cast, for transmitting
- the ganch offset when doing a /g match. This will change */
-/* nosave: For optimizations. */
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- /*register*/ char *s;
- register regnode *c;
- /*register*/ char *startpos = stringarg;
- I32 minlen; /* must match at least this many chars */
- I32 dontbother = 0; /* how many characters not to try at end */
- I32 end_shift = 0; /* Same for the end. */ /* CC */
- I32 scream_pos = -1; /* Internal iterator of scream. */
- char *scream_olds = NULL;
- const bool do_utf8 = (bool)DO_UTF8(sv);
- I32 multiline;
- RXi_GET_DECL(prog,progi);
- regmatch_info reginfo; /* create some info to pass to regtry etc */
- regexp_paren_pair *swap = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGEXEC_FLAGS;
- PERL_UNUSED_ARG(data);
-
- /* Be paranoid... */
- if (prog == NULL || startpos == NULL) {
- Perl_croak(aTHX_ "NULL regexp parameter");
- return 0;
- }
-
- multiline = prog->extflags & RXf_PMf_MULTILINE;
- reginfo.prog = rx; /* Yes, sorry that this is confusing. */
-
- RX_MATCH_UTF8_set(rx, do_utf8);
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, startpos, strend,
- "Matching");
- );
-
- minlen = prog->minlen;
-
- if (strend - startpos < (minlen+(prog->check_offset_min<0?prog->check_offset_min:0))) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short [regexec_flags]...\n"));
- goto phooey;
- }
-
-
- /* Check validity of program. */
- if (UCHARAT(progi->program) != REG_MAGIC) {
- Perl_croak(aTHX_ "corrupted regexp program");
- }
-
- PL_reg_flags = 0;
- PL_reg_eval_set = 0;
- PL_reg_maxiter = 0;
-
- if (RX_UTF8(rx))
- PL_reg_flags |= RF_utf8;
-
- /* Mark beginning of line for ^ and lookbehind. */
- reginfo.bol = startpos; /* XXX not used ??? */
- PL_bostr = strbeg;
- reginfo.sv = sv;
-
- /* Mark end of line for $ (and such) */
- PL_regeol = strend;
-
- /* see how far we have to get to not match where we matched before */
- reginfo.till = startpos+minend;
-
- /* If there is a "must appear" string, look for it. */
- s = startpos;
-
- if (prog->extflags & RXf_GPOS_SEEN) { /* Need to set reginfo->ganch */
- MAGIC *mg;
- if (flags & REXEC_IGNOREPOS){ /* Means: check only at start */
- reginfo.ganch = startpos + prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS IGNOREPOS: reginfo.ganch = startpos + %"UVxf"\n",(UV)prog->gofs));
- } else if (sv && SvTYPE(sv) >= SVt_PVMG
- && SvMAGIC(sv)
- && (mg = mg_find(sv, PERL_MAGIC_regex_global))
- && mg->mg_len >= 0) {
- reginfo.ganch = strbeg + mg->mg_len; /* Defined pos() */
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS MAGIC: reginfo.ganch = strbeg + %"IVdf"\n",(IV)mg->mg_len));
-
- if (prog->extflags & RXf_ANCH_GPOS) {
- if (s > reginfo.ganch)
- goto phooey;
- s = reginfo.ganch - prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS ANCH_GPOS: s = ganch - %"UVxf"\n",(UV)prog->gofs));
- if (s < strbeg)
- goto phooey;
- }
- }
- else if (data) {
- reginfo.ganch = strbeg + PTR2UV(data);
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS DATA: reginfo.ganch= strbeg + %"UVxf"\n",PTR2UV(data)));
-
- } else { /* pos() not defined */
- reginfo.ganch = strbeg;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS: reginfo.ganch = strbeg\n"));
- }
- }
- if (PL_curpm && (PM_GETRE(PL_curpm) == rx)) {
- /* We have to be careful. If the previous successful match
- was from this regex we don't want a subsequent partially
- successful match to clobber the old results.
- So when we detect this possibility we add a swap buffer
- to the re, and switch the buffer each match. If we fail
- we switch it back, otherwise we leave it swapped.
- */
- swap = prog->offs;
- /* do we need a save destructor here for eval dies? */
- Newxz(prog->offs, (prog->nparens + 1), regexp_paren_pair);
- }
- if (!(flags & REXEC_CHECKED) && (prog->check_substr != NULL || prog->check_utf8 != NULL)) {
- re_scream_pos_data d;
-
- d.scream_olds = &scream_olds;
- d.scream_pos = &scream_pos;
- s = re_intuit_start(rx, sv, s, strend, flags, &d);
- if (!s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not present...\n"));
- goto phooey; /* not present */
- }
- }
-
-
-
- /* Simplest case: anchored match need be tried only once. */
- /* [unless only anchor is BOL and multiline is set] */
- if (prog->extflags & (RXf_ANCH & ~RXf_ANCH_GPOS)) {
- if (s == startpos && regtry(®info, &startpos))
- goto got_it;
- else if (multiline || (prog->intflags & PREGf_IMPLICIT)
- || (prog->extflags & RXf_ANCH_MBOL)) /* XXXX SBOL? */
- {
- char *end;
-
- if (minlen)
- dontbother = minlen - 1;
- end = HOP3c(strend, -dontbother, strbeg) - 1;
- /* for multiline we only have to try after newlines */
- if (prog->check_substr || prog->check_utf8) {
- if (s == startpos)
- goto after_try;
- while (1) {
- if (regtry(®info, &s))
- goto got_it;
- after_try:
- if (s > end)
- goto phooey;
- if (prog->extflags & RXf_USE_INTUIT) {
- s = re_intuit_start(rx, sv, s + 1, strend, flags, NULL);
- if (!s)
- goto phooey;
- }
- else
- s++;
- }
- } else {
- if (s > startpos)
- s--;
- while (s < end) {
- if (*s++ == '\n') { /* don't need PL_utf8skip here */
- if (regtry(®info, &s))
- goto got_it;
- }
- }
- }
- }
- goto phooey;
- } else if (RXf_GPOS_CHECK == (prog->extflags & RXf_GPOS_CHECK))
- {
- /* the warning about reginfo.ganch being used without intialization
- is bogus -- we set it above, when prog->extflags & RXf_GPOS_SEEN
- and we only enter this block when the same bit is set. */
- char *tmp_s = reginfo.ganch - prog->gofs;
-
- if (tmp_s >= strbeg && regtry(®info, &tmp_s))
- goto got_it;
- goto phooey;
- }
-
- /* Messy cases: unanchored match. */
- if ((prog->anchored_substr || prog->anchored_utf8) && prog->intflags & PREGf_SKIP) {
- /* we have /x+whatever/ */
- /* it must be a one character string (XXXX Except UTF?) */
- char ch;
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- ch = SvPVX_const(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)[0];
-
- if (do_utf8) {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s += UTF8SKIP(s);
- while (s < strend && *s == ch)
- s += UTF8SKIP(s);
- }
- );
- }
- else {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s++;
- while (s < strend && *s == ch)
- s++;
- }
- );
- }
- DEBUG_EXECUTE_r(if (!did_match)
- PerlIO_printf(Perl_debug_log,
- "Did not find anchored character...\n")
- );
- }
- else if (prog->anchored_substr != NULL
- || prog->anchored_utf8 != NULL
- || ((prog->float_substr != NULL || prog->float_utf8 != NULL)
- && prog->float_max_offset < strend - s)) {
- SV *must;
- I32 back_max;
- I32 back_min;
- char *last;
- char *last1; /* Last position checked before */
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (prog->anchored_substr || prog->anchored_utf8) {
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- back_max = back_min = prog->anchored_offset;
- } else {
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- back_max = prog->float_max_offset;
- back_min = prog->float_min_offset;
- }
-
-
- if (must == &PL_sv_undef)
- /* could not downgrade utf8 check substring, so must fail */
- goto phooey;
-
- if (back_min<0) {
- last = strend;
- } else {
- last = HOP3c(strend, /* Cannot start after this */
- -(I32)(CHR_SVLEN(must)
- - (SvTAIL(must) != 0) + back_min), strbeg);
- }
- if (s > PL_bostr)
- last1 = HOPc(s, -1);
- else
- last1 = s - 1; /* bogus */
-
- /* XXXX check_substr already used to find "s", can optimize if
- check_substr==must. */
- scream_pos = -1;
- dontbother = end_shift;
- strend = HOPc(strend, -dontbother);
- while ( (s <= last) &&
- ((flags & REXEC_SCREAM)
- ? (s = screaminstr(sv, must, HOP3c(s, back_min, (back_min<0 ? strbeg : strend)) - strbeg,
- end_shift, &scream_pos, 0))
- : (s = fbm_instr((unsigned char*)HOP3(s, back_min, (back_min<0 ? strbeg : strend)),
- (unsigned char*)strend, must,
- multiline ? FBMrf_MULTILINE : 0))) ) {
- /* we may be pointing at the wrong string */
- if ((flags & REXEC_SCREAM) && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- DEBUG_EXECUTE_r( did_match = 1 );
- if (HOPc(s, -back_max) > last1) {
- last1 = HOPc(s, -back_min);
- s = HOPc(s, -back_max);
- }
- else {
- char * const t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1;
-
- last1 = HOPc(s, -back_min);
- s = t;
- }
- if (do_utf8) {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s += UTF8SKIP(s);
- }
- }
- else {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s++;
- }
- }
- }
- DEBUG_EXECUTE_r(if (!did_match) {
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "Did not find %s substr %s%s...\n",
- ((must == prog->anchored_substr || must == prog->anchored_utf8)
- ? "anchored" : "floating"),
- quoted, RE_SV_TAIL(must));
- });
- goto phooey;
- }
- else if ( (c = progi->regstclass) ) {
- if (minlen) {
- const OPCODE op = OP(progi->regstclass);
- /* don't bother with what can't match */
- if (PL_regkind[op] != EXACT && op != CANY && PL_regkind[op] != TRIE)
- strend = HOPc(strend, -(minlen - 1));
- }
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, c);
- {
- RE_PV_QUOTED_DECL(quoted,do_utf8,PERL_DEBUG_PAD_ZERO(1),
- s,strend-s,60);
- PerlIO_printf(Perl_debug_log,
- "Matching stclass %.*s against %s (%d chars)\n",
- (int)SvCUR(prop), SvPVX_const(prop),
- quoted, (int)(strend - s));
- }
- });
- if (find_byclass(prog, c, s, strend, ®info))
- goto got_it;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass... [regexec_flags]\n"));
- }
- else {
- dontbother = 0;
- if (prog->float_substr != NULL || prog->float_utf8 != NULL) {
- /* Trim the end. */
- char *last;
- SV* float_real;
-
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- float_real = do_utf8 ? prog->float_utf8 : prog->float_substr;
-
- if (flags & REXEC_SCREAM) {
- last = screaminstr(sv, float_real, s - strbeg,
- end_shift, &scream_pos, 1); /* last one */
- if (!last)
- last = scream_olds; /* Only one occurrence. */
- /* we may be pointing at the wrong string */
- else if (RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- }
- else {
- STRLEN len;
- const char * const little = SvPV_const(float_real, len);
-
- if (SvTAIL(float_real)) {
- if (memEQ(strend - len + 1, little, len - 1))
- last = strend - len + 1;
- else if (!multiline)
- last = memEQ(strend - len, little, len)
- ? strend - len : NULL;
- else
- goto find_last;
- } else {
- find_last:
- if (len)
- last = rninstr(s, strend, little, little + len);
- else
- last = strend; /* matching "$" */
- }
- }
- if (last == NULL) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%sCan't trim the tail, match fails (should not happen)%s\n",
- PL_colors[4], PL_colors[5]));
- goto phooey; /* Should not happen! */
- }
- dontbother = strend - last + prog->float_min_offset;
- }
- if (minlen && (dontbother < minlen))
- dontbother = minlen - 1;
- strend -= dontbother; /* this one's always in bytes! */
- /* We don't know much -- general case. */
- if (do_utf8) {
- for (;;) {
- if (regtry(®info, &s))
- goto got_it;
- if (s >= strend)
- break;
- s += UTF8SKIP(s);
- };
- }
- else {
- do {
- if (regtry(®info, &s))
- goto got_it;
- } while (s++ < strend);
- }
- }
-
- /* Failure. */
- goto phooey;
-
-got_it:
- Safefree(swap);
- RX_MATCH_TAINTED_set(rx, PL_reg_flags & RF_tainted);
-
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (RXp_PAREN_NAMES(prog))
- (void)hv_iterinit(RXp_PAREN_NAMES(prog));
-
- /* make sure $`, $&, $', and $digit will work later */
- if ( !(flags & REXEC_NOT_FIRST) ) {
- RX_MATCH_COPY_FREE(rx);
- if (flags & REXEC_COPY_STR) {
- const I32 i = PL_regeol - startpos + (stringarg - strbeg);
-#ifdef PERL_OLD_COPY_ON_WRITE
- if ((SvIsCOW(sv)
- || (SvFLAGS(sv) & CAN_COW_MASK) == CAN_COW_FLAGS)) {
- if (DEBUG_C_TEST) {
- PerlIO_printf(Perl_debug_log,
- "Copy on write: regexp capture, type %d\n",
- (int) SvTYPE(sv));
- }
- prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv);
- prog->subbeg = (char *)SvPVX_const(prog->saved_copy);
- assert (SvPOKp(prog->saved_copy));
- } else
-#endif
- {
- RX_MATCH_COPIED_on(rx);
- s = savepvn(strbeg, i);
- prog->subbeg = s;
- }
- prog->sublen = i;
- }
- else {
- prog->subbeg = strbeg;
- prog->sublen = PL_regeol - strbeg; /* strend may have been modified */
- }
- }
-
- return 1;
-
-phooey:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n",
- PL_colors[4], PL_colors[5]));
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (swap) {
- /* we failed :-( roll it back */
- Safefree(prog->offs);
- prog->offs = swap;
- }
-
- return 0;
-}
-
-
-/*
- - regtry - try match at specific point
- */
-STATIC I32 /* 0 failure, 1 success */
-S_regtry(pTHX_ regmatch_info *reginfo, char **startpos)
-{
- dVAR;
- CHECKPOINT lastcp;
- REGEXP *const rx = reginfo->prog;
- regexp *const prog = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTRY;
-
- reginfo->cutpoint=NULL;
-
- if ((prog->extflags & RXf_EVAL_SEEN) && !PL_reg_eval_set) {
- MAGIC *mg;
-
- PL_reg_eval_set = RS_init;
- DEBUG_EXECUTE_r(DEBUG_s(
- PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n",
- (IV)(PL_stack_sp - PL_stack_base));
- ));
- SAVESTACK_CXPOS();
- cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base;
- /* Otherwise OP_NEXTSTATE will free whatever on stack now. */
- SAVETMPS;
- /* Apparently this is not needed, judging by wantarray. */
- /* SAVEI8(cxstack[cxstack_ix].blk_gimme);
- cxstack[cxstack_ix].blk_gimme = G_SCALAR; */
-
- if (reginfo->sv) {
- /* Make $_ available to executed code. */
- if (reginfo->sv != DEFSV) {
- SAVE_DEFSV;
- DEFSV_set(reginfo->sv);
- }
-
- if (!(SvTYPE(reginfo->sv) >= SVt_PVMG && SvMAGIC(reginfo->sv)
- && (mg = mg_find(reginfo->sv, PERL_MAGIC_regex_global)))) {
- /* prepare for quick setting of pos */
-#ifdef PERL_OLD_COPY_ON_WRITE
- if (SvIsCOW(reginfo->sv))
- sv_force_normal_flags(reginfo->sv, 0);
-#endif
- mg = sv_magicext(reginfo->sv, NULL, PERL_MAGIC_regex_global,
- &PL_vtbl_mglob, NULL, 0);
- mg->mg_len = -1;
- }
- PL_reg_magic = mg;
- PL_reg_oldpos = mg->mg_len;
- SAVEDESTRUCTOR_X(restore_pos, prog);
- }
- if (!PL_reg_curpm) {
- Newxz(PL_reg_curpm, 1, PMOP);
-#ifdef USE_ITHREADS
- {
- SV* const repointer = &PL_sv_undef;
- /* this regexp is also owned by the new PL_reg_curpm, which
- will try to free it. */
- av_push(PL_regex_padav, repointer);
- PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav);
- PL_regex_pad = AvARRAY(PL_regex_padav);
- }
-#endif
- }
-#ifdef USE_ITHREADS
- /* It seems that non-ithreads works both with and without this code.
- So for efficiency reasons it seems best not to have the code
- compiled when it is not needed. */
- /* This is safe against NULLs: */
- ReREFCNT_dec(PM_GETRE(PL_reg_curpm));
- /* PM_reg_curpm owns a reference to this regexp. */
- ReREFCNT_inc(rx);
-#endif
- PM_SETRE(PL_reg_curpm, rx);
- PL_reg_oldcurpm = PL_curpm;
- PL_curpm = PL_reg_curpm;
- if (RXp_MATCH_COPIED(prog)) {
- /* Here is a serious problem: we cannot rewrite subbeg,
- since it may be needed if this match fails. Thus
- $` inside (?{}) could fail... */
- PL_reg_oldsaved = prog->subbeg;
- PL_reg_oldsavedlen = prog->sublen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = prog->saved_copy;
-#endif
- RXp_MATCH_COPIED_off(prog);
- }
- else
- PL_reg_oldsaved = NULL;
- prog->subbeg = PL_bostr;
- prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */
- }
- DEBUG_EXECUTE_r(PL_reg_starttry = *startpos);
- prog->offs[0].start = *startpos - PL_bostr;
- PL_reginput = *startpos;
- PL_reglastparen = &prog->lastparen;
- PL_reglastcloseparen = &prog->lastcloseparen;
- prog->lastparen = 0;
- prog->lastcloseparen = 0;
- PL_regsize = 0;
- PL_regoffs = prog->offs;
- if (PL_reg_start_tmpl <= prog->nparens) {
- PL_reg_start_tmpl = prog->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- /* XXXX What this code is doing here?!!! There should be no need
- to do this again and again, PL_reglastparen should take care of
- this! --ilya*/
-
- /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code.
- * Actually, the code in regcppop() (which Ilya may be meaning by
- * PL_reglastparen), is not needed at all by the test suite
- * (op/regexp, op/pat, op/split), but that code is needed otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * Meanwhile, this code *is* needed for the
- * above-mentioned test suite tests to succeed. The common theme
- * on those tests seems to be returning null fields from matches.
- * --jhi updated by dapm */
-#if 1
- if (prog->nparens) {
- regexp_paren_pair *pp = PL_regoffs;
- register I32 i;
- for (i = prog->nparens; i > (I32)*PL_reglastparen; i--) {
- ++pp;
- pp->start = -1;
- pp->end = -1;
- }
- }
-#endif
- REGCP_SET(lastcp);
- if (regmatch(reginfo, progi->program + 1)) {
- PL_regoffs[0].end = PL_reginput - PL_bostr;
- return 1;
- }
- if (reginfo->cutpoint)
- *startpos= reginfo->cutpoint;
- REGCP_UNWIND(lastcp);
- return 0;
-}
-
-
-#define sayYES goto yes
-#define sayNO goto no
-#define sayNO_SILENT goto no_silent
-
-/* we dont use STMT_START/END here because it leads to
- "unreachable code" warnings, which are bogus, but distracting. */
-#define CACHEsayNO \
- if (ST.cache_mask) \
- PL_reg_poscache[ST.cache_offset] |= ST.cache_mask; \
- sayNO
-
-/* this is used to determine how far from the left messages like
- 'failed...' are printed. It should be set such that messages
- are inline with the regop output that created them.
-*/
-#define REPORT_CODE_OFF 32
-
-
-/* Make sure there is a test for this +1 options in re_tests */
-#define TRIE_INITAL_ACCEPT_BUFFLEN 4;
-
-#define CHRTEST_UNINIT -1001 /* c1/c2 haven't been calculated yet */
-#define CHRTEST_VOID -1000 /* the c1/c2 "next char" test should be skipped */
-
-#define SLAB_FIRST(s) (&(s)->states[0])
-#define SLAB_LAST(s) (&(s)->states[PERL_REGMATCH_SLAB_SLOTS-1])
-
-/* grab a new slab and return the first slot in it */
-
-STATIC regmatch_state *
-S_push_slab(pTHX)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- regmatch_slab *s = PL_regmatch_slab->next;
- if (!s) {
- Newx(s, 1, regmatch_slab);
- s->prev = PL_regmatch_slab;
- s->next = NULL;
- PL_regmatch_slab->next = s;
- }
- PL_regmatch_slab = s;
- return SLAB_FIRST(s);
-}
-
-
-/* push a new state then goto it */
-
-#define PUSH_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_state;
-
-/* push a new state with success backtracking, then goto it */
-
-#define PUSH_YES_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_yes_state;
-
-
-
-/*
-
-regmatch() - main matching routine
-
-This is basically one big switch statement in a loop. We execute an op,
-set 'next' to point the next op, and continue. If we come to a point which
-we may need to backtrack to on failure such as (A|B|C), we push a
-backtrack state onto the backtrack stack. On failure, we pop the top
-state, and re-enter the loop at the state indicated. If there are no more
-states to pop, we return failure.
-
-Sometimes we also need to backtrack on success; for example /A+/, where
-after successfully matching one A, we need to go back and try to
-match another one; similarly for lookahead assertions: if the assertion
-completes successfully, we backtrack to the state just before the assertion
-and then carry on. In these cases, the pushed state is marked as
-'backtrack on success too'. This marking is in fact done by a chain of
-pointers, each pointing to the previous 'yes' state. On success, we pop to
-the nearest yes state, discarding any intermediate failure-only states.
-Sometimes a yes state is pushed just to force some cleanup code to be
-called at the end of a successful match or submatch; e.g. (??{$re}) uses
-it to free the inner regex.
-
-Note that failure backtracking rewinds the cursor position, while
-success backtracking leaves it alone.
-
-A pattern is complete when the END op is executed, while a subpattern
-such as (?=foo) is complete when the SUCCESS op is executed. Both of these
-ops trigger the "pop to last yes state if any, otherwise return true"
-behaviour.
-
-A common convention in this function is to use A and B to refer to the two
-subpatterns (or to the first nodes thereof) in patterns like /A*B/: so A is
-the subpattern to be matched possibly multiple times, while B is the entire
-rest of the pattern. Variable and state names reflect this convention.
-
-The states in the main switch are the union of ops and failure/success of
-substates associated with with that op. For example, IFMATCH is the op
-that does lookahead assertions /(?=A)B/ and so the IFMATCH state means
-'execute IFMATCH'; while IFMATCH_A is a state saying that we have just
-successfully matched A and IFMATCH_A_fail is a state saying that we have
-just failed to match A. Resume states always come in pairs. The backtrack
-state we push is marked as 'IFMATCH_A', but when that is popped, we resume
-at IFMATCH_A or IFMATCH_A_fail, depending on whether we are backtracking
-on success or failure.
-
-The struct that holds a backtracking state is actually a big union, with
-one variant for each major type of op. The variable st points to the
-top-most backtrack struct. To make the code clearer, within each
-block of code we #define ST to alias the relevant union.
-
-Here's a concrete example of a (vastly oversimplified) IFMATCH
-implementation:
-
- switch (state) {
- ....
-
-#define ST st->u.ifmatch
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- ST.foo = ...; // some state we wish to save
- ...
- // push a yes backtrack state with a resume value of
- // IFMATCH_A/IFMATCH_A_fail, then continue execution at the
- // first node of A:
- PUSH_YES_STATE_GOTO(IFMATCH_A, A);
- // NOTREACHED
-
- case IFMATCH_A: // we have successfully executed A; now continue with B
- next = B;
- bar = ST.foo; // do something with the preserved value
- break;
-
- case IFMATCH_A_fail: // A failed, so the assertion failed
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
-
-#undef ST
-
- ...
- }
-
-For any old-timers reading this who are familiar with the old recursive
-approach, the code above is equivalent to:
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- {
- int foo = ...
- ...
- if (regmatch(A)) {
- next = B;
- bar = foo;
- break;
- }
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
- }
-
-The topmost backtrack state, pointed to by st, is usually free. If you
-want to claim it, populate any ST.foo fields in it with values you wish to
-save, then do one of
-
- PUSH_STATE_GOTO(resume_state, node);
- PUSH_YES_STATE_GOTO(resume_state, node);
-
-which sets that backtrack state's resume value to 'resume_state', pushes a
-new free entry to the top of the backtrack stack, then goes to 'node'.
-On backtracking, the free slot is popped, and the saved state becomes the
-new free state. An ST.foo field in this new top state can be temporarily
-accessed to retrieve values, but once the main loop is re-entered, it
-becomes available for reuse.
-
-Note that the depth of the backtrack stack constantly increases during the
-left-to-right execution of the pattern, rather than going up and down with
-the pattern nesting. For example the stack is at its maximum at Z at the
-end of the pattern, rather than at X in the following:
-
- /(((X)+)+)+....(Y)+....Z/
-
-The only exceptions to this are lookahead/behind assertions and the cut,
-(?>A), which pop all the backtrack states associated with A before
-continuing.
-
-Bascktrack state structs are allocated in slabs of about 4K in size.
-PL_regmatch_state and st always point to the currently active state,
-and PL_regmatch_slab points to the slab currently containing
-PL_regmatch_state. The first time regmatch() is called, the first slab is
-allocated, and is never freed until interpreter destruction. When the slab
-is full, a new one is allocated and chained to the end. At exit from
-regmatch(), slabs allocated since entry are freed.
-
-*/
-
-
-#define DEBUG_STATE_pp(pp) \
- DEBUG_STATE_r({ \
- DUMP_EXEC_POS(locinput, scan, do_utf8); \
- PerlIO_printf(Perl_debug_log, \
- " %*s"pp" %s%s%s%s%s\n", \
- depth*2, "", \
- PL_reg_name[st->resume_state], \
- ((st==yes_state||st==mark_state) ? "[" : ""), \
- ((st==yes_state) ? "Y" : ""), \
- ((st==mark_state) ? "M" : ""), \
- ((st==yes_state||st==mark_state) ? "]" : "") \
- ); \
- });
-
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-prog) : -1)
-
-#ifdef DEBUGGING
-
-STATIC void
-S_debug_start_match(pTHX_ const REGEXP *prog, const bool do_utf8,
- const char *start, const char *end, const char *blurb)
-{
- const bool utf8_pat = RX_UTF8(prog) ? 1 : 0;
-
- PERL_ARGS_ASSERT_DEBUG_START_MATCH;
-
- if (!PL_colorset)
- reginitcolors();
- {
- RE_PV_QUOTED_DECL(s0, utf8_pat, PERL_DEBUG_PAD_ZERO(0),
- RX_PRECOMP_const(prog), RX_PRELEN(prog), 60);
-
- RE_PV_QUOTED_DECL(s1, do_utf8, PERL_DEBUG_PAD_ZERO(1),
- start, end - start, 60);
-
- PerlIO_printf(Perl_debug_log,
- "%s%s REx%s %s against %s\n",
- PL_colors[4], blurb, PL_colors[5], s0, s1);
-
- if (do_utf8||utf8_pat)
- PerlIO_printf(Perl_debug_log, "UTF-8 %s%s%s...\n",
- utf8_pat ? "pattern" : "",
- utf8_pat && do_utf8 ? " and " : "",
- do_utf8 ? "string" : ""
- );
- }
-}
-
-STATIC void
-S_dump_exec_pos(pTHX_ const char *locinput,
- const regnode *scan,
- const char *loc_regeol,
- const char *loc_bostr,
- const char *loc_reg_starttry,
- const bool do_utf8)
-{
- const int docolor = *PL_colors[0] || *PL_colors[2] || *PL_colors[4];
- const int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */
- int l = (loc_regeol - locinput) > taill ? taill : (loc_regeol - locinput);
- /* The part of the string before starttry has one color
- (pref0_len chars), between starttry and current
- position another one (pref_len - pref0_len chars),
- after the current position the third one.
- We assume that pref0_len <= pref_len, otherwise we
- decrease pref0_len. */
- int pref_len = (locinput - loc_bostr) > (5 + taill) - l
- ? (5 + taill) - l : locinput - loc_bostr;
- int pref0_len;
-
- PERL_ARGS_ASSERT_DUMP_EXEC_POS;
-
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len)))
- pref_len++;
- pref0_len = pref_len - (locinput - loc_reg_starttry);
- if (l + pref_len < (5 + taill) && l < loc_regeol - locinput)
- l = ( loc_regeol - locinput > (5 + taill) - pref_len
- ? (5 + taill) - pref_len : loc_regeol - locinput);
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput + l)))
- l--;
- if (pref0_len < 0)
- pref0_len = 0;
- if (pref0_len > pref_len)
- pref0_len = pref_len;
- {
- const int is_uni = (do_utf8 && OP(scan) != CANY) ? 1 : 0;
-
- RE_PV_COLOR_DECL(s0,len0,is_uni,PERL_DEBUG_PAD(0),
- (locinput - pref_len),pref0_len, 60, 4, 5);
-
- RE_PV_COLOR_DECL(s1,len1,is_uni,PERL_DEBUG_PAD(1),
- (locinput - pref_len + pref0_len),
- pref_len - pref0_len, 60, 2, 3);
-
- RE_PV_COLOR_DECL(s2,len2,is_uni,PERL_DEBUG_PAD(2),
- locinput, loc_regeol - locinput, 10, 0, 1);
-
- const STRLEN tlen=len0+len1+len2;
- PerlIO_printf(Perl_debug_log,
- "%4"IVdf" <%.*s%.*s%s%.*s>%*s|",
- (IV)(locinput - loc_bostr),
- len0, s0,
- len1, s1,
- (docolor ? "" : "> <"),
- len2, s2,
- (int)(tlen > 19 ? 0 : 19 - tlen),
- "");
- }
-}
-
-#endif
-
-/* reg_check_named_buff_matched()
- * Checks to see if a named buffer has matched. The data array of
- * buffer numbers corresponding to the buffer is expected to reside
- * in the regexp->data->data array in the slot stored in the ARG() of
- * node involved. Note that this routine doesn't actually care about the
- * name, that information is not preserved from compilation to execution.
- * Returns the index of the leftmost defined buffer with the given name
- * or 0 if non of the buffers matched.
- */
-STATIC I32
-S_reg_check_named_buff_matched(pTHX_ const regexp *rex, const regnode *scan)
-{
- I32 n;
- RXi_GET_DECL(rex,rexi);
- SV *sv_dat= MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
-
- PERL_ARGS_ASSERT_REG_CHECK_NAMED_BUFF_MATCHED;
-
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- if ((I32)*PL_reglastparen >= nums[n] &&
- PL_regoffs[nums[n]].end != -1)
- {
- return nums[n];
- }
- }
- return 0;
-}
-
-
-/* free all slabs above current one - called during LEAVE_SCOPE */
-
-STATIC void
-S_clear_backtrack_stack(pTHX_ void *p)
-{
- regmatch_slab *s = PL_regmatch_slab->next;
- PERL_UNUSED_ARG(p);
-
- if (!s)
- return;
- PL_regmatch_slab->next = NULL;
- while (s) {
- regmatch_slab * const osl = s;
- s = s->next;
- Safefree(osl);
- }
-}
-
-
-#define SETREX(Re1,Re2) \
- if (PL_reg_eval_set) PM_SETRE((PL_reg_curpm), (Re2)); \
- Re1 = (Re2)
-
-STATIC I32 /* 0 failure, 1 success */
-S_regmatch(pTHX_ regmatch_info *reginfo, regnode *prog)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- dVAR;
- register const bool do_utf8 = PL_reg_match_utf8;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- REGEXP *rex_sv = reginfo->prog;
- regexp *rex = (struct regexp *)SvANY(rex_sv);
- RXi_GET_DECL(rex,rexi);
- I32 oldsave;
- /* the current state. This is a cached copy of PL_regmatch_state */
- register regmatch_state *st;
- /* cache heavy used fields of st in registers */
- register regnode *scan;
- register regnode *next;
- register U32 n = 0; /* general value; init to avoid compiler warning */
- register I32 ln = 0; /* len or last; init to avoid compiler warning */
- register char *locinput = PL_reginput;
- register I32 nextchr; /* is always set to UCHARAT(locinput) */
-
- bool result = 0; /* return value of S_regmatch */
- int depth = 0; /* depth of backtrack stack */
- U32 nochange_depth = 0; /* depth of GOSUB recursion with nochange */
- const U32 max_nochange_depth =
- (3 * rex->nparens > MAX_RECURSE_EVAL_NOCHANGE_DEPTH) ?
- 3 * rex->nparens : MAX_RECURSE_EVAL_NOCHANGE_DEPTH;
- regmatch_state *yes_state = NULL; /* state to pop to on success of
- subpattern */
- /* mark_state piggy backs on the yes_state logic so that when we unwind
- the stack on success we can update the mark_state as we go */
- regmatch_state *mark_state = NULL; /* last mark state we have seen */
- regmatch_state *cur_eval = NULL; /* most recent EVAL_AB state */
- struct regmatch_state *cur_curlyx = NULL; /* most recent curlyx */
- U32 state_num;
- bool no_final = 0; /* prevent failure from backtracking? */
- bool do_cutgroup = 0; /* no_final only until next branch/trie entry */
- char *startpoint = PL_reginput;
- SV *popmark = NULL; /* are we looking for a mark? */
- SV *sv_commit = NULL; /* last mark name seen in failure */
- SV *sv_yes_mark = NULL; /* last mark name we have seen
- during a successfull match */
- U32 lastopen = 0; /* last open we saw */
- bool has_cutgroup = RX_HAS_CUTGROUP(rex) ? 1 : 0;
- SV* const oreplsv = GvSV(PL_replgv);
- /* these three flags are set by various ops to signal information to
- * the very next op. They have a useful lifetime of exactly one loop
- * iteration, and are not preserved or restored by state pushes/pops
- */
- bool sw = 0; /* the condition value in (?(cond)a|b) */
- bool minmod = 0; /* the next "{n,m}" is a "{n,m}?" */
- int logical = 0; /* the following EVAL is:
- 0: (?{...})
- 1: (?(?{...})X|Y)
- 2: (??{...})
- or the following IFMATCH/UNLESSM is:
- false: plain (?=foo)
- true: used as a condition: (?(?=foo))
- */
-#ifdef DEBUGGING
- GET_RE_DEBUG_FLAGS_DECL;
-#endif
-
- PERL_ARGS_ASSERT_REGMATCH;
-
- DEBUG_OPTIMISE_r( DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,"regmatch start\n");
- }));
- /* on first ever call to regmatch, allocate first slab */
- if (!PL_regmatch_slab) {
- Newx(PL_regmatch_slab, 1, regmatch_slab);
- PL_regmatch_slab->prev = NULL;
- PL_regmatch_slab->next = NULL;
- PL_regmatch_state = SLAB_FIRST(PL_regmatch_slab);
- }
-
- oldsave = PL_savestack_ix;
- SAVEDESTRUCTOR_X(S_clear_backtrack_stack, NULL);
- SAVEVPTR(PL_regmatch_slab);
- SAVEVPTR(PL_regmatch_state);
-
- /* grab next free state slot */
- st = ++PL_regmatch_state;
- if (st > SLAB_LAST(PL_regmatch_slab))
- st = PL_regmatch_state = S_push_slab(aTHX);
-
- /* Note that nextchr is a byte even in UTF */
- nextchr = UCHARAT(locinput);
- scan = prog;
- while (scan != NULL) {
-
- DEBUG_EXECUTE_r( {
- SV * const prop = sv_newmortal();
- regnode *rnext=regnext(scan);
- DUMP_EXEC_POS( locinput, scan, do_utf8 );
- regprop(rex, prop, scan);
-
- PerlIO_printf(Perl_debug_log,
- "%3"IVdf":%*s%s(%"IVdf")\n",
- (IV)(scan - rexi->program), depth*2, "",
- SvPVX_const(prop),
- (PL_regkind[OP(scan)] == END || !rnext) ?
- 0 : (IV)(rnext - rexi->program));
- });
-
- next = scan + NEXT_OFF(scan);
- if (next == scan)
- next = NULL;
- state_num = OP(scan);
-
- reenter_switch:
-
- assert(PL_reglastparen == &rex->lastparen);
- assert(PL_reglastcloseparen == &rex->lastcloseparen);
- assert(PL_regoffs == rex->offs);
-
- switch (state_num) {
- case BOL:
- if (locinput == PL_bostr)
- {
- /* reginfo->till = reginfo->bol; */
- break;
- }
- sayNO;
- case MBOL:
- if (locinput == PL_bostr ||
- ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n'))
- {
- break;
- }
- sayNO;
- case SBOL:
- if (locinput == PL_bostr)
- break;
- sayNO;
- case GPOS:
- if (locinput == reginfo->ganch)
- break;
- sayNO;
-
- case KEEPS:
- /* update the startpoint */
- st->u.keeper.val = PL_regoffs[0].start;
- PL_reginput = locinput;
- PL_regoffs[0].start = locinput - PL_bostr;
- PUSH_STATE_GOTO(KEEPS_next, next);
- /*NOT-REACHED*/
- case KEEPS_next_fail:
- /* rollback the start point change */
- PL_regoffs[0].start = st->u.keeper.val;
- sayNO_SILENT;
- /*NOT-REACHED*/
- case EOL:
- goto seol;
- case MEOL:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- break;
- case SEOL:
- seol:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- if (PL_regeol - locinput > 1)
- sayNO;
- break;
- case EOS:
- if (PL_regeol != locinput)
- sayNO;
- break;
- case SANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
- case CANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case REG_ANY:
- if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n')
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
-
-#undef ST
-#define ST st->u.trie
- case TRIEC:
- /* In this case the charclass data is available inline so
- we can fail fast without a lot of extra overhead.
- */
- if (scan->flags == EXACT || !do_utf8) {
- if(!ANYOF_BITMAP_TEST(scan, *locinput)) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case TRIE:
- {
- /* what type of TRIE am I? (utf8 makes this contextual) */
- DECL_TRIE_TYPE(scan);
-
- /* what trie are we using right now */
- reg_trie_data * const trie
- = (reg_trie_data*)rexi->data->data[ ARG( scan ) ];
- HV * widecharmap = MUTABLE_HV(rexi->data->data[ ARG( scan ) + 1 ]);
- U32 state = trie->startstate;
-
- if (trie->bitmap && trie_type != trie_utf8_fold &&
- !TRIE_BITMAP_TEST(trie,*locinput)
- ) {
- if (trie->states[ state ].wordnum) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %smatched empty string...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- break;
- } else {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- }
- }
-
- {
- U8 *uc = ( U8* )locinput;
-
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- STRLEN bufflen=0;
- SV *sv_accept_buff = NULL;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- ST.accepted = 0; /* how many accepting states we have seen */
- ST.B = next;
- ST.jump = trie->jump;
- ST.me = scan;
- /*
- traverse the TRIE keeping track of all accepting states
- we transition through until we get to a failing node.
- */
-
- while ( state && uc <= (U8*)PL_regeol ) {
- U32 base = trie->states[ state ].trans.base;
- UV uvc = 0;
- U16 charid;
- /* We use charid to hold the wordnum as we don't use it
- for charid until after we have done the wordnum logic.
- We define an alias just so that the wordnum logic reads
- more naturally. */
-
-#define got_wordnum charid
- got_wordnum = trie->states[ state ].wordnum;
-
- if ( got_wordnum ) {
- if ( ! ST.accepted ) {
- ENTER;
- SAVETMPS; /* XXX is this necessary? dmq */
- bufflen = TRIE_INITAL_ACCEPT_BUFFLEN;
- sv_accept_buff=newSV(bufflen *
- sizeof(reg_trie_accepted) - 1);
- SvCUR_set(sv_accept_buff, 0);
- SvPOK_on(sv_accept_buff);
- sv_2mortal(sv_accept_buff);
- SAVETMPS;
- ST.accept_buff =
- (reg_trie_accepted*)SvPV_nolen(sv_accept_buff );
- }
- do {
- if (ST.accepted >= bufflen) {
- bufflen *= 2;
- ST.accept_buff =(reg_trie_accepted*)
- SvGROW(sv_accept_buff,
- bufflen * sizeof(reg_trie_accepted));
- }
- SvCUR_set(sv_accept_buff,SvCUR(sv_accept_buff)
- + sizeof(reg_trie_accepted));
-
-
- ST.accept_buff[ST.accepted].wordnum = got_wordnum;
- ST.accept_buff[ST.accepted].endpos = uc;
- ++ST.accepted;
- } while (trie->nextword && (got_wordnum= trie->nextword[got_wordnum]));
- }
-#undef got_wordnum
-
- DEBUG_TRIE_EXECUTE_r({
- DUMP_EXEC_POS( (char *)uc, scan, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%*s %sState: %4"UVxf" Accepted: %4"UVxf" ",
- 2+depth * 2, "", PL_colors[4],
- (UV)state, (UV)ST.accepted );
- });
-
- if ( base ) {
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
-
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state)
- {
- state = trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next;
- }
- else {
- state = 0;
- }
- uc += len;
-
- }
- else {
- state = 0;
- }
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "Charid:%3x CP:%4"UVxf" After State: %4"UVxf"%s\n",
- charid, uvc, (UV)state, PL_colors[5] );
- );
- }
- if (!ST.accepted )
- sayNO;
-
- DEBUG_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" possible matches%s\n",
- REPORT_CODE_OFF + depth * 2, "",
- PL_colors[4], (IV)ST.accepted, PL_colors[5] );
- );
- }}
- goto trie_first_try; /* jump into the fail handler */
- /* NOTREACHED */
- case TRIE_next_fail: /* we failed - try next alterative */
- if ( ST.jump) {
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- }
- trie_first_try:
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
-
- if ( ST.jump) {
- ST.lastparen = *PL_reglastparen;
- REGCP_SET(ST.cp);
- }
- if ( ST.accepted == 1 ) {
- /* only one choice left - just continue */
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ 0 ].wordnum-1, 0 );
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %sonly one match left: #%d <%s>%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[ 0 ].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- )
- : "not compiled under -Dr",
- PL_colors[5] );
- });
- PL_reginput = (char *)ST.accept_buff[ 0 ].endpos;
- /* in this case we free tmps/leave before we call regmatch
- as we wont be using accept_buff again. */
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- if ( !ST.jump || !ST.jump[ST.accept_buff[0].wordnum])
- scan = ST.B;
- else
- scan = ST.me + ST.jump[ST.accept_buff[0].wordnum];
- if (!has_cutgroup) {
- FREETMPS;
- LEAVE;
- } else {
- ST.accepted--;
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- }
-
- continue; /* execute rest of RE */
- }
-
- if ( !ST.accepted-- ) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sTRIE failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- FREETMPS;
- LEAVE;
- sayNO_SILENT;
- /*NOTREACHED*/
- }
-
- /*
- There are at least two accepting states left. Presumably
- the number of accepting states is going to be low,
- typically two. So we simply scan through to find the one
- with lowest wordnum. Once we find it, we swap the last
- state into its place and decrement the size. We then try to
- match the rest of the pattern at the point where the word
- ends. If we succeed, control just continues along the
- regex; if we fail we return here to try the next accepting
- state
- */
-
- {
- U32 best = 0;
- U32 cur;
- for( cur = 1 ; cur <= ST.accepted ; cur++ ) {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" (%d) as best, looking at %"IVdf" (%d)%s\n",
- REPORT_CODE_OFF + depth * 2, "", PL_colors[4],
- (IV)best, ST.accept_buff[ best ].wordnum, (IV)cur,
- ST.accept_buff[ cur ].wordnum, PL_colors[5] );
- );
-
- if (ST.accept_buff[cur].wordnum <
- ST.accept_buff[best].wordnum)
- best = cur;
- }
-
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ best ].wordnum - 1, 0 );
- regnode *nextop=(!ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) ?
- ST.B :
- ST.me + ST.jump[ST.accept_buff[best].wordnum];
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %strying alternation #%d <%s> at node #%d %s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[best].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- ) : "not compiled under -Dr",
- REG_NODE_NUM(nextop),
- PL_colors[5] );
- });
-
- if ( best<ST.accepted ) {
- reg_trie_accepted tmp = ST.accept_buff[ best ];
- ST.accept_buff[ best ] = ST.accept_buff[ ST.accepted ];
- ST.accept_buff[ ST.accepted ] = tmp;
- best = ST.accepted;
- }
- PL_reginput = (char *)ST.accept_buff[ best ].endpos;
- if ( !ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) {
- scan = ST.B;
- } else {
- scan = ST.me + ST.jump[ST.accept_buff[best].wordnum];
- }
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- /* NOTREACHED */
- }
- /* NOTREACHED */
- case TRIE_next:
- /* we dont want to throw this away, see bug 57042*/
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- FREETMPS;
- LEAVE;
- sayYES;
-#undef ST
-
- case EXACT: {
- char *s = STRING(scan);
- ln = STR_LEN(scan);
- if (do_utf8 != UTF) {
- /* The target and the pattern have differing utf8ness. */
- char *l = locinput;
- const char * const e = s + ln;
-
- if (do_utf8) {
- /* The target is utf8, the pattern is not utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*(U8*)s) !=
- utf8n_to_uvuni((U8*)l, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- l += ulen;
- s ++;
- }
- }
- else {
- /* The target is not utf8, the pattern is utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*((U8*)l)) !=
- utf8n_to_uvuni((U8*)s, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- s += ulen;
- l ++;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
- /* The target and the pattern have the same utf8ness. */
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr)
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && memNE(s, locinput, ln))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case EXACTFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case EXACTF: {
- char * const s = STRING(scan);
- ln = STR_LEN(scan);
-
- if (do_utf8 || UTF) {
- /* Either target or the pattern are utf8. */
- const char * const l = locinput;
- char *e = PL_regeol;
-
- if (ibcmp_utf8(s, 0, ln, (bool)UTF,
- l, &e, 0, do_utf8)) {
- /* One more case for the sharp s:
- * pack("U0U*", 0xDF) =~ /ss/i,
- * the 0xC3 0x9F are the UTF-8
- * byte sequence for the U+00DF. */
-
- if (!(do_utf8 &&
- toLOWER(s[0]) == 's' &&
- ln >= 2 &&
- toLOWER(s[1]) == 's' &&
- (U8)l[0] == 0xC3 &&
- e - l >= 2 &&
- (U8)l[1] == 0x9F))
- sayNO;
- }
- locinput = e;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Neither the target and the pattern are utf8. */
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- UCHARAT(s) != ((OP(scan) == EXACTF)
- ? PL_fold : PL_fold_locale)[nextchr])
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && (OP(scan) == EXACTF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln)))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case BOUNDL:
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- case NBOUND:
- /* was last char in word? */
- if (do_utf8) {
- if (locinput == PL_bostr)
- ln = '\n';
- else {
- const U8 * const r = reghop3((U8*)locinput, -1, (U8*)PL_bostr);
-
- ln = utf8n_to_uvchr(r, UTF8SKIP(r), 0, uniflags);
- }
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM_uni(ln);
- LOAD_UTF8_CHARCLASS_ALNUM();
- n = swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8);
- }
- else {
- ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln));
- n = isALNUM_LC_utf8((U8*)locinput);
- }
- }
- else {
- ln = (locinput != PL_bostr) ?
- UCHARAT(locinput - 1) : '\n';
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM(ln);
- n = isALNUM(nextchr);
- }
- else {
- ln = isALNUM_LC(ln);
- n = isALNUM_LC(nextchr);
- }
- }
- if (((!ln) == (!n)) == (OP(scan) == BOUND ||
- OP(scan) == BOUNDL))
- sayNO;
- break;
- case ANYOF:
- if (do_utf8) {
- STRLEN inclasslen = PL_regeol - locinput;
-
- if (!reginclass(rex, scan, (U8*)locinput, &inclasslen, do_utf8))
- goto anyof_fail;
- if (locinput >= PL_regeol)
- sayNO;
- locinput += inclasslen ? inclasslen : UTF8SKIP(locinput);
- nextchr = UCHARAT(locinput);
- break;
- }
- else {
- if (nextchr < 0)
- nextchr = UCHARAT(locinput);
- if (!REGINCLASS(rex, scan, (U8*)locinput))
- goto anyof_fail;
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- }
- anyof_fail:
- /* If we might have the case of the German sharp s
- * in a casefolding Unicode character class. */
-
- if (ANYOF_FOLD_SHARP_S(scan, locinput, PL_regeol)) {
- locinput += SHARP_S_SKIP;
- nextchr = UCHARAT(locinput);
- }
- else
- sayNO;
- break;
- /* Special char classes - The defines start on line 129 or so */
- CCC_TRY_AFF( ALNUM, ALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
- CCC_TRY_NEG(NALNUM, NALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
-
- CCC_TRY_AFF( SPACE, SPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
- CCC_TRY_NEG(NSPACE, NSPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
-
- CCC_TRY_AFF( DIGIT, DIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
- CCC_TRY_NEG(NDIGIT, NDIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
-
- case CLUMP: /* Match \X: logical Unicode character. This is defined as
- a Unicode extended Grapheme Cluster */
- /* From http://www.unicode.org/reports/tr29 (5.2 version). An
- extended Grapheme Cluster is:
-
- CR LF
- | Prepend* Begin Extend*
- | .
-
- Begin is (Hangul-syllable | ! Control)
- Extend is (Grapheme_Extend | Spacing_Mark)
- Control is [ GCB_Control CR LF ]
-
- The discussion below shows how the code for CLUMP is derived
- from this regex. Note that most of these concepts are from
- property values of the Grapheme Cluster Boundary (GCB) property.
- No code point can have multiple property values for a given
- property. Thus a code point in Prepend can't be in Control, but
- it must be in !Control. This is why Control above includes
- GCB_Control plus CR plus LF. The latter two are used in the GCB
- property separately, and so can't be in GCB_Control, even though
- they logically are controls. Control is not the same as gc=cc,
- but includes format and other characters as well.
-
- The Unicode definition of Hangul-syllable is:
- L+
- | (L* ( ( V | LV ) V* | LVT ) T*)
- | T+
- )
- Each of these is a value for the GCB property, and hence must be
- disjoint, so the order they are tested is immaterial, so the
- above can safely be changed to
- T+
- | L+
- | (L* ( LVT | ( V | LV ) V*) T*)
-
- The last two terms can be combined like this:
- L* ( L
- | (( LVT | ( V | LV ) V*) T*))
-
- And refactored into this:
- L* (L | LVT T* | V V* T* | LV V* T*)
-
- That means that if we have seen any L's at all we can quit
- there, but if the next character is a LVT, a V or and LV we
- should keep going.
-
- There is a subtlety with Prepend* which showed up in testing.
- Note that the Begin, and only the Begin is required in:
- | Prepend* Begin Extend*
- Also, Begin contains '! Control'. A Prepend must be a '!
- Control', which means it must be a Begin. What it comes down to
- is that if we match Prepend* and then find no suitable Begin
- afterwards, that if we backtrack the last Prepend, that one will
- be a suitable Begin.
- */
-
- if (locinput >= PL_regeol)
- sayNO;
- if (! do_utf8) {
-
- /* Match either CR LF or '.', as all the other possibilities
- * require utf8 */
- locinput++; /* Match the . or CR */
- if (nextchr == '\r'
- && locinput < PL_regeol
- && UCHARAT(locinput) == '\n') locinput++;
- }
- else {
-
- /* Utf8: See if is ( CR LF ); already know that locinput <
- * PL_regeol, so locinput+1 is in bounds */
- if (nextchr == '\r' && UCHARAT(locinput + 1) == '\n') {
- locinput += 2;
- }
- else {
- /* In case have to backtrack to beginning, then match '.' */
- char *starting = locinput;
-
- /* In case have to backtrack the last prepend */
- char *previous_prepend = 0;
-
- LOAD_UTF8_CHARCLASS_GCB();
-
- /* Match (prepend)* */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_prepend,
- (U8*)locinput, do_utf8))
- {
- previous_prepend = locinput;
- locinput += UTF8SKIP(locinput);
- }
-
- /* As noted above, if we matched a prepend character, but
- * the next thing won't match, back off the last prepend we
- * matched, as it is guaranteed to match the begin */
- if (previous_prepend
- && (locinput >= PL_regeol
- || ! swash_fetch(PL_utf8_X_begin,
- (U8*)locinput, do_utf8)))
- {
- locinput = previous_prepend;
- }
-
- /* Note that here we know PL_regeol > locinput, as we
- * tested that upon input to this switch case, and if we
- * moved locinput forward, we tested the result just above
- * and it either passed, or we backed off so that it will
- * now pass */
- if (! swash_fetch(PL_utf8_X_begin, (U8*)locinput, do_utf8)) {
-
- /* Here did not match the required 'Begin' in the
- * second term. So just match the very first
- * character, the '.' of the final term of the regex */
- locinput = starting + UTF8SKIP(starting);
- } else {
-
- /* Here is the beginning of a character that can have
- * an extender. It is either a hangul syllable, or a
- * non-control */
- if (swash_fetch(PL_utf8_X_non_hangul,
- (U8*)locinput, do_utf8))
- {
-
- /* Here not a Hangul syllable, must be a
- * ('! * Control') */
- locinput += UTF8SKIP(locinput);
- } else {
-
- /* Here is a Hangul syllable. It can be composed
- * of several individual characters. One
- * possibility is T+ */
- if (swash_fetch(PL_utf8_X_T,
- (U8*)locinput, do_utf8))
- {
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_T,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- } else {
-
- /* Here, not T+, but is a Hangul. That means
- * it is one of the others: L, LV, LVT or V,
- * and matches:
- * L* (L | LVT T* | V V* T* | LV V* T*) */
-
- /* Match L* */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_L,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
-
- /* Here, have exhausted L*. If the next
- * character is not an LV, LVT nor V, it means
- * we had to have at least one L, so matches L+
- * in the original equation, we have a complete
- * hangul syllable. Are done. */
-
- if (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_LV_LVT_V,
- (U8*)locinput, do_utf8))
- {
-
- /* Otherwise keep going. Must be LV, LVT
- * or V. See if LVT */
- if (swash_fetch(PL_utf8_X_LVT,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- } else {
-
- /* Must be V or LV. Take it, then
- * match V* */
- locinput += UTF8SKIP(locinput);
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_V,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- }
-
- /* And any of LV, LVT, or V can be followed
- * by T* */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_T,
- (U8*)locinput,
- do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- }
- }
- }
-
- /* Match any extender */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_extend,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- }
- }
- if (locinput > PL_regeol) sayNO;
- }
- nextchr = UCHARAT(locinput);
- break;
-
- case NREFFL:
- {
- char *s;
- char type;
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NREF:
- case NREFF:
- type = OP(scan);
- n = reg_check_named_buff_matched(rex,scan);
-
- if ( n ) {
- type = REF + ( type - NREF );
- goto do_ref;
- } else {
- sayNO;
- }
- /* unreached */
- case REFFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case REF:
- case REFF:
- n = ARG(scan); /* which paren pair */
- type = OP(scan);
- do_ref:
- ln = PL_regoffs[n].start;
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (*PL_reglastparen < n || ln == -1)
- sayNO; /* Do not match unless seen CLOSEn. */
- if (ln == PL_regoffs[n].end)
- break;
-
- s = PL_bostr + ln;
- if (do_utf8 && type != REF) { /* REF can do byte comparison */
- char *l = locinput;
- const char *e = PL_bostr + PL_regoffs[n].end;
- /*
- * Note that we can't do the "other character" lookup trick as
- * in the 8-bit case (no pun intended) because in Unicode we
- * have to map both upper and title case to lower case.
- */
- if (type == REFF) {
- while (s < e) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- if (l >= PL_regeol)
- sayNO;
- toLOWER_utf8((U8*)s, tmpbuf1, &ulen1);
- toLOWER_utf8((U8*)l, tmpbuf2, &ulen2);
- if (ulen1 != ulen2 || memNE((char *)tmpbuf1, (char *)tmpbuf2, ulen1))
- sayNO;
- s += ulen1;
- l += ulen2;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- (type == REF ||
- (UCHARAT(s) != (type == REFF
- ? PL_fold : PL_fold_locale)[nextchr])))
- sayNO;
- ln = PL_regoffs[n].end - ln;
- if (locinput + ln > PL_regeol)
- sayNO;
- if (ln > 1 && (type == REF
- ? memNE(s, locinput, ln)
- : (type == REFF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln))))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case NOTHING:
- case TAIL:
- break;
- case BACK:
- break;
-
-#undef ST
-#define ST st->u.eval
- {
- SV *ret;
- REGEXP *re_sv;
- regexp *re;
- regexp_internal *rei;
- regnode *startpoint;
-
- case GOSTART:
- case GOSUB: /* /(...(?1))/ /(...(?&foo))/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if (cur_eval->u.eval.close_paren == (U32)ARG(scan))
- Perl_croak(aTHX_ "Infinite recursion in regex");
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_
- "Pattern subroutine nesting without pos change"
- " exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- re_sv = rex_sv;
- re = rex;
- rei = rexi;
- (void)ReREFCNT_inc(rex_sv);
- if (OP(scan)==GOSUB) {
- startpoint = scan + ARG2L(scan);
- ST.close_paren = ARG(scan);
- } else {
- startpoint = rei->program+1;
- ST.close_paren = 0;
- }
- goto eval_recurse_doit;
- /* NOTREACHED */
- case EVAL: /* /(?{A})B/ /(??{A})B/ and /(?(?{A})X|Y)B/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_ "EVAL without pos change exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- {
- /* execute the code in the {...} */
- dSP;
- SV ** const before = SP;
- OP_4tree * const oop = PL_op;
- COP * const ocurcop = PL_curcop;
- PAD *old_comppad;
- char *saved_regeol = PL_regeol;
-
- n = ARG(scan);
- PL_op = (OP_4tree*)rexi->data->data[n];
- DEBUG_STATE_r( PerlIO_printf(Perl_debug_log,
- " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) );
- PAD_SAVE_LOCAL(old_comppad, (PAD*)rexi->data->data[n + 2]);
- PL_regoffs[0].end = PL_reg_magic->mg_len = locinput - PL_bostr;
-
- if (sv_yes_mark) {
- SV *sv_mrk = get_sv("REGMARK", 1);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- CALLRUNOPS(aTHX); /* Scalar context. */
- SPAGAIN;
- if (SP == before)
- ret = &PL_sv_undef; /* protect against empty (?{}) blocks. */
- else {
- ret = POPs;
- PUTBACK;
- }
-
- PL_op = oop;
- PAD_RESTORE_LOCAL(old_comppad);
- PL_curcop = ocurcop;
- PL_regeol = saved_regeol;
- if (!logical) {
- /* /(?{...})/ */
- sv_setsv(save_scalar(PL_replgv), ret);
- break;
- }
- }
- if (logical == 2) { /* Postponed subexpression: /(??{...})/ */
- logical = 0;
- {
- /* extract RE object from returned value; compiling if
- * necessary */
- MAGIC *mg = NULL;
- REGEXP *rx = NULL;
-
- if (SvROK(ret)) {
- SV *const sv = SvRV(ret);
-
- if (SvTYPE(sv) == SVt_REGEXP) {
- rx = (REGEXP*) sv;
- } else if (SvSMAGICAL(sv)) {
- mg = mg_find(sv, PERL_MAGIC_qr);
- assert(mg);
- }
- } else if (SvTYPE(ret) == SVt_REGEXP) {
- rx = (REGEXP*) ret;
- } else if (SvSMAGICAL(ret)) {
- if (SvGMAGICAL(ret)) {
- /* I don't believe that there is ever qr magic
- here. */
- assert(!mg_find(ret, PERL_MAGIC_qr));
- sv_unmagic(ret, PERL_MAGIC_qr);
- }
- else {
- mg = mg_find(ret, PERL_MAGIC_qr);
- /* testing suggests mg only ends up non-NULL for
- scalars who were upgraded and compiled in the
- else block below. In turn, this is only
- triggered in the "postponed utf8 string" tests
- in t/op/pat.t */
- }
- }
-
- if (mg) {
- rx = (REGEXP *) mg->mg_obj; /*XXX:dmq*/
- assert(rx);
- }
- if (rx) {
- rx = reg_temp_copy(NULL, rx);
- }
- else {
- U32 pm_flags = 0;
- const I32 osize = PL_regsize;
-
- if (DO_UTF8(ret)) {
- assert (SvUTF8(ret));
- } else if (SvUTF8(ret)) {
- /* Not doing UTF-8, despite what the SV says. Is
- this only if we're trapped in use 'bytes'? */
- /* Make a copy of the octet sequence, but without
- the flag on, as the compiler now honours the
- SvUTF8 flag on ret. */
- STRLEN len;
- const char *const p = SvPV(ret, len);
- ret = newSVpvn_flags(p, len, SVs_TEMP);
- }
- rx = CALLREGCOMP(ret, pm_flags);
- if (!(SvFLAGS(ret)
- & (SVs_TEMP | SVs_PADTMP | SVf_READONLY
- | SVs_GMG))) {
- /* This isn't a first class regexp. Instead, it's
- caching a regexp onto an existing, Perl visible
- scalar. */
- sv_magic(ret, MUTABLE_SV(rx), PERL_MAGIC_qr, 0, 0);
- }
- PL_regsize = osize;
- }
- re_sv = rx;
- re = (struct regexp *)SvANY(rx);
- }
- RXp_MATCH_COPIED_off(re);
- re->subbeg = rex->subbeg;
- re->sublen = rex->sublen;
- rei = RXi_GET(re);
- DEBUG_EXECUTE_r(
- debug_start_match(re_sv, do_utf8, locinput, PL_regeol,
- "Matching embedded");
- );
- startpoint = rei->program + 1;
- ST.close_paren = 0; /* only used for GOSUB */
- /* borrowed from regtry */
- if (PL_reg_start_tmpl <= re->nparens) {
- PL_reg_start_tmpl = re->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- eval_recurse_doit: /* Share code with GOSUB below this line */
- /* run the pattern returned from (??{...}) */
- ST.cp = regcppush(0); /* Save *all* the positions. */
- REGCP_SET(ST.lastcp);
-
- PL_regoffs = re->offs; /* essentially NOOP on GOSUB */
-
- /* see regtry, specifically PL_reglast(?:close)?paren is a pointer! (i dont know why) :dmq */
- PL_reglastparen = &re->lastparen;
- PL_reglastcloseparen = &re->lastcloseparen;
- re->lastparen = 0;
- re->lastcloseparen = 0;
-
- PL_reginput = locinput;
- PL_regsize = 0;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
-
- ST.toggle_reg_flags = PL_reg_flags;
- if (RX_UTF8(re_sv))
- PL_reg_flags |= RF_utf8;
- else
- PL_reg_flags &= ~RF_utf8;
- ST.toggle_reg_flags ^= PL_reg_flags; /* diff of old and new */
-
- ST.prev_rex = rex_sv;
- ST.prev_curlyx = cur_curlyx;
- SETREX(rex_sv,re_sv);
- rex = re;
- rexi = rei;
- cur_curlyx = NULL;
- ST.B = next;
- ST.prev_eval = cur_eval;
- cur_eval = st;
- /* now continue from first node in postoned RE */
- PUSH_YES_STATE_GOTO(EVAL_AB, startpoint);
- /* NOTREACHED */
- }
- /* logical is 1, /(?(?{...})X|Y)/ */
- sw = (bool)SvTRUE(ret);
- logical = 0;
- break;
- }
-
- case EVAL_AB: /* cleanup after a successful (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- regcpblow(ST.cp);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
- /* also update PL_regoffs */
- PL_regoffs = rex->offs;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayYES;
-
-
- case EVAL_AB_fail: /* unsuccessfully ran A or B in (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- PL_reginput = locinput;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayNO_SILENT;
-#undef ST
-
- case OPEN:
- n = ARG(scan); /* which paren pair */
- PL_reg_start_tmp[n] = locinput;
- if (n > PL_regsize)
- PL_regsize = n;
- lastopen = n;
- break;
- case CLOSE:
- n = ARG(scan); /* which paren pair */
- PL_regoffs[n].start = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if (cur_eval && cur_eval->u.eval.close_paren == n) {
- goto fake_end;
- }
- break;
- case ACCEPT:
- if (ARG(scan)){
- regnode *cursor;
- for (cursor=scan;
- cursor && OP(cursor)!=END;
- cursor=regnext(cursor))
- {
- if ( OP(cursor)==CLOSE ){
- n = ARG(cursor);
- if ( n <= lastopen ) {
- PL_regoffs[n].start
- = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if ( n == ARG(scan) || (cur_eval &&
- cur_eval->u.eval.close_paren == n))
- break;
- }
- }
- }
- }
- goto fake_end;
- /*NOTREACHED*/
- case GROUPP:
- n = ARG(scan); /* which paren pair */
- sw = (bool)(*PL_reglastparen >= n && PL_regoffs[n].end != -1);
- break;
- case NGROUPP:
- /* reg_check_named_buff_matched returns 0 for no match */
- sw = (bool)(0 < reg_check_named_buff_matched(rex,scan));
- break;
- case INSUBP:
- n = ARG(scan);
- sw = (cur_eval && (!n || cur_eval->u.eval.close_paren == n));
- break;
- case DEFINEP:
- sw = 0;
- break;
- case IFTHEN:
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (sw)
- next = NEXTOPER(NEXTOPER(scan));
- else {
- next = scan + ARG(scan);
- if (OP(next) == IFTHEN) /* Fake one. */
- next = NEXTOPER(NEXTOPER(next));
- }
- break;
- case LOGICAL:
- logical = scan->flags;
- break;
-
-/*******************************************************************
-
-The CURLYX/WHILEM pair of ops handle the most generic case of the /A*B/
-pattern, where A and B are subpatterns. (For simple A, CURLYM or
-STAR/PLUS/CURLY/CURLYN are used instead.)
-
-A*B is compiled as <CURLYX><A><WHILEM><B>
-
-On entry to the subpattern, CURLYX is called. This pushes a CURLYX
-state, which contains the current count, initialised to -1. It also sets
-cur_curlyx to point to this state, with any previous value saved in the
-state block.
-
-CURLYX then jumps straight to the WHILEM op, rather than executing A,
-since the pattern may possibly match zero times (i.e. it's a while {} loop
-rather than a do {} while loop).
-
-Each entry to WHILEM represents a successful match of A. The count in the
-CURLYX block is incremented, another WHILEM state is pushed, and execution
-passes to A or B depending on greediness and the current count.
-
-For example, if matching against the string a1a2a3b (where the aN are
-substrings that match /A/), then the match progresses as follows: (the
-pushed states are interspersed with the bits of strings matched so far):
-
- <CURLYX cnt=-1>
- <CURLYX cnt=0><WHILEM>
- <CURLYX cnt=1><WHILEM> a1 <WHILEM>
- <CURLYX cnt=2><WHILEM> a1 <WHILEM> a2 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> b
-
-(Contrast this with something like CURLYM, which maintains only a single
-backtrack state:
-
- <CURLYM cnt=0> a1
- a1 <CURLYM cnt=1> a2
- a1 a2 <CURLYM cnt=2> a3
- a1 a2 a3 <CURLYM cnt=3> b
-)
-
-Each WHILEM state block marks a point to backtrack to upon partial failure
-of A or B, and also contains some minor state data related to that
-iteration. The CURLYX block, pointed to by cur_curlyx, contains the
-overall state, such as the count, and pointers to the A and B ops.
-
-This is complicated slightly by nested CURLYX/WHILEM's. Since cur_curlyx
-must always point to the *current* CURLYX block, the rules are:
-
-When executing CURLYX, save the old cur_curlyx in the CURLYX state block,
-and set cur_curlyx to point the new block.
-
-When popping the CURLYX block after a successful or unsuccessful match,
-restore the previous cur_curlyx.
-
-When WHILEM is about to execute B, save the current cur_curlyx, and set it
-to the outer one saved in the CURLYX block.
-
-When popping the WHILEM block after a successful or unsuccessful B match,
-restore the previous cur_curlyx.
-
-Here's an example for the pattern (AI* BI)*BO
-I and O refer to inner and outer, C and W refer to CURLYX and WHILEM:
-
-cur_
-curlyx backtrack stack
------- ---------------
-NULL
-CO <CO prev=NULL> <WO>
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-NULL <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi <WO prev=CO> bo
-
-At this point the pattern succeeds, and we work back down the stack to
-clean up, restoring as we go:
-
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO>
-NULL
-
-*******************************************************************/
-
-#define ST st->u.curlyx
-
- case CURLYX: /* start of /A*B/ (for complex A) */
- {
- /* No need to save/restore up to this paren */
- I32 parenfloor = scan->flags;
-
- assert(next); /* keep Coverity happy */
- if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */
- next += ARG(next);
-
- /* XXXX Probably it is better to teach regpush to support
- parenfloor > PL_regsize... */
- if (parenfloor > (I32)*PL_reglastparen)
- parenfloor = *PL_reglastparen; /* Pessimization... */
-
- ST.prev_curlyx= cur_curlyx;
- cur_curlyx = st;
- ST.cp = PL_savestack_ix;
-
- /* these fields contain the state of the current curly.
- * they are accessed by subsequent WHILEMs */
- ST.parenfloor = parenfloor;
- ST.min = ARG1(scan);
- ST.max = ARG2(scan);
- ST.A = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- ST.B = next;
- ST.minmod = minmod;
- minmod = 0;
- ST.count = -1; /* this will be updated by WHILEM */
- ST.lastloc = NULL; /* this will be updated by WHILEM */
-
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYX_end, PREVOPER(next));
- /* NOTREACHED */
- }
-
- case CURLYX_end: /* just finished matching all of A*B */
- cur_curlyx = ST.prev_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case CURLYX_end_fail: /* just failed to match all of A*B */
- regcpblow(ST.cp);
- cur_curlyx = ST.prev_curlyx;
- sayNO;
- /* NOTREACHED */
-
-
-#undef ST
-#define ST st->u.whilem
-
- case WHILEM: /* just matched an A in /A*B/ (for complex A) */
- {
- /* see the discussion above about CURLYX/WHILEM */
- I32 n;
- assert(cur_curlyx); /* keep Coverity happy */
- n = ++cur_curlyx->u.curlyx.count; /* how many A's matched */
- ST.save_lastloc = cur_curlyx->u.curlyx.lastloc;
- ST.cache_offset = 0;
- ST.cache_mask = 0;
-
- PL_reginput = locinput;
-
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: matched %ld out of %ld..%ld\n",
- REPORT_CODE_OFF+depth*2, "", (long)n,
- (long)cur_curlyx->u.curlyx.min,
- (long)cur_curlyx->u.curlyx.max)
- );
-
- /* First just match a string of min A's. */
-
- if (n < cur_curlyx->u.curlyx.min) {
- cur_curlyx->u.curlyx.lastloc = locinput;
- PUSH_STATE_GOTO(WHILEM_A_pre, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
-
- /* If degenerate A matches "", assume A done. */
-
- if (locinput == cur_curlyx->u.curlyx.lastloc) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: empty match detected, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- goto do_whilem_B_max;
- }
-
- /* super-linear cache processing */
-
- if (scan->flags) {
-
- if (!PL_reg_maxiter) {
- /* start the countdown: Postpone detection until we
- * know the match is not *that* much linear. */
- PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4);
- /* possible overflow for long strings and many CURLYX's */
- if (PL_reg_maxiter < 0)
- PL_reg_maxiter = I32_MAX;
- PL_reg_leftiter = PL_reg_maxiter;
- }
-
- if (PL_reg_leftiter-- == 0) {
- /* initialise cache */
- const I32 size = (PL_reg_maxiter + 7)/8;
- if (PL_reg_poscache) {
- if ((I32)PL_reg_poscache_size < size) {
- Renew(PL_reg_poscache, size, char);
- PL_reg_poscache_size = size;
- }
- Zero(PL_reg_poscache, size, char);
- }
- else {
- PL_reg_poscache_size = size;
- Newxz(PL_reg_poscache, size, char);
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%swhilem: Detected a super-linear match, switching on caching%s...\n",
- PL_colors[4], PL_colors[5])
- );
- }
-
- if (PL_reg_leftiter < 0) {
- /* have we already failed at this position? */
- I32 offset, mask;
- offset = (scan->flags & 0xf) - 1
- + (locinput - PL_bostr) * (scan->flags>>4);
- mask = 1 << (offset % 8);
- offset /= 8;
- if (PL_reg_poscache[offset] & mask) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: (cache) already tried at this position...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- sayNO; /* cache records failure */
- }
- ST.cache_offset = offset;
- ST.cache_mask = mask;
- }
- }
-
- /* Prefer B over A for minimal matching. */
-
- if (cur_curlyx->u.curlyx.minmod) {
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- ST.cp = regcppush(ST.save_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_YES_STATE_GOTO(WHILEM_B_min, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
- }
-
- /* Prefer A over B for maximal matching. */
-
- if (n < cur_curlyx->u.curlyx.max) { /* More greed allowed? */
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- cur_curlyx->u.curlyx.lastloc = locinput;
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_max, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
- goto do_whilem_B_max;
- }
- /* NOTREACHED */
-
- case WHILEM_B_min: /* just matched B in a minimal match */
- case WHILEM_B_max: /* just matched B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case WHILEM_B_max_fail: /* just failed to match B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_min_fail: /* just failed to match A in a minimal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- /* FALL THROUGH */
- case WHILEM_A_pre_fail: /* just failed to match even minimal A */
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_max_fail: /* just failed to match A in a maximal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex); /* Restore some previous $<digit>s? */
- PL_reginput = locinput;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s whilem: failed, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- do_whilem_B_max:
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
-
- /* now try B */
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- PUSH_YES_STATE_GOTO(WHILEM_B_max, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
-
- case WHILEM_B_min_fail: /* just failed to match B in a minimal match */
- cur_curlyx = ST.save_curlyx;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
-
- if (cur_curlyx->u.curlyx.count >= cur_curlyx->u.curlyx.max) {
- /* Maximum greed exceeded */
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP),
- "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s trying longer...\n", REPORT_CODE_OFF+depth*2, "")
- );
- /* Try grabbing another A and see if it helps. */
- PL_reginput = locinput;
- cur_curlyx->u.curlyx.lastloc = locinput;
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_min, ST.save_curlyx->u.curlyx.A);
- /* NOTREACHED */
-
-#undef ST
-#define ST st->u.branch
-
- case BRANCHJ: /* /(...|A|...)/ with long next pointer */
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- scan = NEXTOPER(scan);
- /* FALL THROUGH */
-
- case BRANCH: /* /(...|A|...)/ */
- scan = NEXTOPER(scan); /* scan now points to inner node */
- ST.lastparen = *PL_reglastparen;
- ST.next_branch = next;
- REGCP_SET(ST.cp);
- PL_reginput = locinput;
-
- /* Now go into the branch */
- if (has_cutgroup) {
- PUSH_YES_STATE_GOTO(BRANCH_next, scan);
- } else {
- PUSH_STATE_GOTO(BRANCH_next, scan);
- }
- /* NOTREACHED */
- case CUTGROUP:
- PL_reginput = locinput;
- sv_yes_mark = st->u.mark.mark_name = scan->flags ? NULL :
- MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(CUTGROUP_next,next);
- /* NOTREACHED */
- case CUTGROUP_next_fail:
- do_cutgroup = 1;
- no_final = 1;
- if (st->u.mark.mark_name)
- sv_commit = st->u.mark.mark_name;
- sayNO;
- /* NOTREACHED */
- case BRANCH_next:
- sayYES;
- /* NOTREACHED */
- case BRANCH_next_fail: /* that branch failed; try the next, if any */
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- /*dmq: *PL_reglastcloseparen = n; */
- scan = ST.next_branch;
- /* no more branches? */
- if (!scan || (OP(scan) != BRANCH && OP(scan) != BRANCHJ)) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sBRANCH failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- sayNO_SILENT;
- }
- continue; /* execute next BRANCH[J] op */
- /* NOTREACHED */
-
- case MINMOD:
- minmod = 1;
- break;
-
-#undef ST
-#define ST st->u.curlym
-
- case CURLYM: /* /A{m,n}B/ where A is fixed-length */
-
- /* This is an optimisation of CURLYX that enables us to push
- * only a single backtracking state, no matter how many matches
- * there are in {m,n}. It relies on the pattern being constant
- * length, with no parens to influence future backrefs
- */
-
- ST.me = scan;
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
-
- /* if paren positive, emulate an OPEN/CLOSE around A */
- if (ST.me->flags) {
- U32 paren = ST.me->flags;
- if (paren > PL_regsize)
- PL_regsize = paren;
- if (paren > *PL_reglastparen)
- *PL_reglastparen = paren;
- scan += NEXT_OFF(scan); /* Skip former OPEN. */
- }
- ST.A = scan;
- ST.B = next;
- ST.alen = 0;
- ST.count = 0;
- ST.minmod = minmod;
- minmod = 0;
- ST.c1 = CHRTEST_UNINIT;
- REGCP_SET(ST.cp);
-
- if (!(ST.minmod ? ARG1(ST.me) : ARG2(ST.me))) /* min/max */
- goto curlym_do_B;
-
- curlym_do_A: /* execute the A in /A{m,n}B/ */
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYM_A, ST.A); /* match A */
- /* NOTREACHED */
-
- case CURLYM_A: /* we've just matched an A */
- locinput = st->locinput;
- nextchr = UCHARAT(locinput);
-
- ST.count++;
- /* after first match, determine A's length: u.curlym.alen */
- if (ST.count == 1) {
- if (PL_reg_match_utf8) {
- char *s = locinput;
- while (s < PL_reginput) {
- ST.alen++;
- s += UTF8SKIP(s);
- }
- }
- else {
- ST.alen = PL_reginput - locinput;
- }
- if (ST.alen == 0)
- ST.count = ST.minmod ? ARG1(ST.me) : ARG2(ST.me);
- }
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM now matched %"IVdf" times, len=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)), "",
- (IV) ST.count, (IV)ST.alen)
- );
-
- locinput = PL_reginput;
-
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- goto fake_end;
-
- {
- I32 max = (ST.minmod ? ARG1(ST.me) : ARG2(ST.me));
- if ( max == REG_INFTY || ST.count < max )
- goto curlym_do_A; /* try to match another A */
- }
- goto curlym_do_B; /* try to match B */
-
- case CURLYM_A_fail: /* just failed to match an A */
- REGCP_UNWIND(ST.cp);
-
- if (ST.minmod || ST.count < ARG1(ST.me) /* min*/
- || (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags))
- sayNO;
-
- curlym_do_B: /* execute the B in /A{m,n}B/ */
- PL_reginput = locinput;
- if (ST.c1 == CHRTEST_UNINIT) {
- /* calculate c1 and c2 for possible match of 1st char
- * following curly */
- ST.c1 = ST.c2 = CHRTEST_VOID;
- if (HAS_TEXT(ST.B) || JUMPABLE(ST.B)) {
- regnode *text_node = ST.B;
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
- /* this used to be
-
- (HAS_TEXT(text_node) && PL_regkind[OP(text_node)] == EXACT)
-
- But the former is redundant in light of the latter.
-
- if this changes back then the macro for
- IS_TEXT and friends need to change.
- */
- if (PL_regkind[OP(text_node)] == EXACT)
- {
-
- ST.c1 = (U8)*STRING(text_node);
- ST.c2 =
- (IS_TEXTF(text_node))
- ? PL_fold[ST.c1]
- : (IS_TEXTFL(text_node))
- ? PL_fold_locale[ST.c1]
- : ST.c1;
- }
- }
- }
-
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM trying tail with matches=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)),
- "", (IV)ST.count)
- );
- if (ST.c1 != CHRTEST_VOID
- && UCHARAT(PL_reginput) != ST.c1
- && UCHARAT(PL_reginput) != ST.c2)
- {
- /* simulate B failing */
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM Fast bail c1=%"IVdf" c2=%"IVdf"\n",
- (int)(REPORT_CODE_OFF+(depth*2)),"",
- (IV)ST.c1,(IV)ST.c2
- ));
- state_num = CURLYM_B_fail;
- goto reenter_switch;
- }
-
- if (ST.me->flags) {
- /* mark current A as captured */
- I32 paren = ST.me->flags;
- if (ST.count) {
- PL_regoffs[paren].start
- = HOPc(PL_reginput, -ST.alen) - PL_bostr;
- PL_regoffs[paren].end = PL_reginput - PL_bostr;
- /*dmq: *PL_reglastcloseparen = paren; */
- }
- else
- PL_regoffs[paren].end = -1;
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- {
- if (ST.count)
- goto fake_end;
- else
- sayNO;
- }
- }
-
- PUSH_STATE_GOTO(CURLYM_B, ST.B); /* match B */
- /* NOTREACHED */
-
- case CURLYM_B_fail: /* just failed to match a B */
- REGCP_UNWIND(ST.cp);
- if (ST.minmod) {
- I32 max = ARG2(ST.me);
- if (max != REG_INFTY && ST.count == max)
- sayNO;
- goto curlym_do_A; /* try to match a further A */
- }
- /* backtrack one A */
- if (ST.count == ARG1(ST.me) /* min */)
- sayNO;
- ST.count--;
- locinput = HOPc(locinput, -ST.alen);
- goto curlym_do_B; /* try to match B */
-
-#undef ST
-#define ST st->u.curly
-
-#define CURLY_SETPAREN(paren, success) \
- if (paren) { \
- if (success) { \
- PL_regoffs[paren].start = HOPc(locinput, -1) - PL_bostr; \
- PL_regoffs[paren].end = locinput - PL_bostr; \
- *PL_reglastcloseparen = paren; \
- } \
- else \
- PL_regoffs[paren].end = -1; \
- }
-
- case STAR: /* /A*B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 0;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case PLUS: /* /A+B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 1;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case CURLYN: /* /(A){m,n}B/ where A is width 1 */
- ST.paren = scan->flags; /* Which paren to set */
- if (ST.paren > PL_regsize)
- PL_regsize = ST.paren;
- if (ST.paren > *PL_reglastparen)
- *PL_reglastparen = ST.paren;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- ST.min=1;
- ST.max=1;
- }
- scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE);
- goto repeat;
- case CURLY: /* /A{m,n}B/ where A is width 1 */
- ST.paren = 0;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
- repeat:
- /*
- * Lookahead to avoid useless match attempts
- * when we know what character comes next.
- *
- * Used to only do .*x and .*?x, but now it allows
- * for )'s, ('s and (?{ ... })'s to be in the way
- * of the quantifier and the EXACT-like node. -- japhy
- */
-
- if (ST.min > ST.max) /* XXX make this a compile-time check? */
- sayNO;
- if (HAS_TEXT(next) || JUMPABLE(next)) {
- U8 *s;
- regnode *text_node = next;
-
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
-
- if (! HAS_TEXT(text_node))
- ST.c1 = ST.c2 = CHRTEST_VOID;
- else {
- if ( PL_regkind[OP(text_node)] != EXACT ) {
- ST.c1 = ST.c2 = CHRTEST_VOID;
- goto assume_ok_easy;
- }
- else
- s = (U8*)STRING(text_node);
-
- /* Currently we only get here when
-
- PL_rekind[OP(text_node)] == EXACT
-
- if this changes back then the macro for IS_TEXT and
- friends need to change. */
- if (!UTF) {
- ST.c2 = ST.c1 = *s;
- if (IS_TEXTF(text_node))
- ST.c2 = PL_fold[ST.c1];
- else if (IS_TEXTFL(text_node))
- ST.c2 = PL_fold_locale[ST.c1];
- }
- else { /* UTF */
- if (IS_TEXTF(text_node)) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- to_utf8_lower((U8*)s, tmpbuf1, &ulen1);
- to_utf8_upper((U8*)s, tmpbuf2, &ulen2);
-#ifdef EBCDIC
- ST.c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
- ST.c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
-#else
- ST.c1 = utf8n_to_uvuni(tmpbuf1, UTF8_MAXBYTES, 0,
- uniflags);
- ST.c2 = utf8n_to_uvuni(tmpbuf2, UTF8_MAXBYTES, 0,
- uniflags);
-#endif
- }
- else {
- ST.c2 = ST.c1 = utf8n_to_uvchr(s, UTF8_MAXBYTES, 0,
- uniflags);
- }
- }
- }
- }
- else
- ST.c1 = ST.c2 = CHRTEST_VOID;
- assume_ok_easy:
-
- ST.A = scan;
- ST.B = next;
- PL_reginput = locinput;
- if (minmod) {
- minmod = 0;
- if (ST.min && regrepeat(rex, ST.A, ST.min, depth) < ST.min)
- sayNO;
- ST.count = ST.min;
- locinput = PL_reginput;
- REGCP_SET(ST.cp);
- if (ST.c1 == CHRTEST_VOID)
- goto curly_try_B_min;
-
- ST.oldloc = locinput;
-
- /* set ST.maxpos to the furthest point along the
- * string that could possibly match */
- if (ST.max == REG_INFTY) {
- ST.maxpos = PL_regeol - 1;
- if (do_utf8)
- while (UTF8_IS_CONTINUATION(*(U8*)ST.maxpos))
- ST.maxpos--;
- }
- else if (do_utf8) {
- int m = ST.max - ST.min;
- for (ST.maxpos = locinput;
- m >0 && ST.maxpos + UTF8SKIP(ST.maxpos) <= PL_regeol; m--)
- ST.maxpos += UTF8SKIP(ST.maxpos);
- }
- else {
- ST.maxpos = locinput + ST.max - ST.min;
- if (ST.maxpos >= PL_regeol)
- ST.maxpos = PL_regeol - 1;
- }
- goto curly_try_B_min_known;
-
- }
- else {
- ST.count = regrepeat(rex, ST.A, ST.max, depth);
- locinput = PL_reginput;
- if (ST.count < ST.min)
- sayNO;
- if ((ST.count > ST.min)
- && (PL_regkind[OP(ST.B)] == EOL) && (OP(ST.B) != MEOL))
- {
- /* A{m,n} must come at the end of the string, there's
- * no point in backing off ... */
- ST.min = ST.count;
- /* ...except that $ and \Z can match before *and* after
- newline at the end. Consider "\n\n" =~ /\n+\Z\n/.
- We may back off by one in this case. */
- if (UCHARAT(PL_reginput - 1) == '\n' && OP(ST.B) != EOS)
- ST.min--;
- }
- REGCP_SET(ST.cp);
- goto curly_try_B_max;
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_known_fail:
- /* failed to find B in a non-greedy match where c1,c2 valid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- PL_reginput = locinput; /* Could be reset... */
- REGCP_UNWIND(ST.cp);
- /* Couldn't or didn't -- move forward. */
- ST.oldloc = locinput;
- if (do_utf8)
- locinput += UTF8SKIP(locinput);
- else
- locinput++;
- ST.count++;
- curly_try_B_min_known:
- /* find the next place where 'B' could work, then call B */
- {
- int n;
- if (do_utf8) {
- n = (ST.oldloc == locinput) ? 0 : 1;
- if (ST.c1 == ST.c2) {
- STRLEN len;
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos &&
- utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags) != (UV)ST.c1) {
- locinput += len;
- n++;
- }
- }
- else {
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos) {
- STRLEN len;
- const UV c = utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags);
- if (c == (UV)ST.c1 || c == (UV)ST.c2)
- break;
- locinput += len;
- n++;
- }
- }
- }
- else {
- if (ST.c1 == ST.c2) {
- while (locinput <= ST.maxpos &&
- UCHARAT(locinput) != ST.c1)
- locinput++;
- }
- else {
- while (locinput <= ST.maxpos
- && UCHARAT(locinput) != ST.c1
- && UCHARAT(locinput) != ST.c2)
- locinput++;
- }
- n = locinput - ST.oldloc;
- }
- if (locinput > ST.maxpos)
- sayNO;
- /* PL_reginput == oldloc now */
- if (n) {
- ST.count += n;
- if (regrepeat(rex, ST.A, n, depth) < n)
- sayNO;
- }
- PL_reginput = locinput;
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min_known, ST.B);
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_fail:
- /* failed to find B in a non-greedy match where c1,c2 invalid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* failed -- move forward one */
- PL_reginput = locinput;
- if (regrepeat(rex, ST.A, 1, depth)) {
- ST.count++;
- locinput = PL_reginput;
- if (ST.count <= ST.max || (ST.max == REG_INFTY &&
- ST.count > 0)) /* count overflow ? */
- {
- curly_try_B_min:
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min, ST.B);
- }
- }
- sayNO;
- /* NOTREACHED */
-
-
- curly_try_B_max:
- /* a successful greedy match: now try to match B */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- {
- UV c = 0;
- if (ST.c1 != CHRTEST_VOID)
- c = do_utf8 ? utf8n_to_uvchr((U8*)PL_reginput,
- UTF8_MAXBYTES, 0, uniflags)
- : (UV) UCHARAT(PL_reginput);
- /* If it could work, try it. */
- if (ST.c1 == CHRTEST_VOID || c == (UV)ST.c1 || c == (UV)ST.c2) {
- CURLY_SETPAREN(ST.paren, ST.count);
- PUSH_STATE_GOTO(CURLY_B_max, ST.B);
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case CURLY_B_max_fail:
- /* failed to find B in a greedy match */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* back up. */
- if (--ST.count < ST.min)
- sayNO;
- PL_reginput = locinput = HOPc(locinput, -1);
- goto curly_try_B_max;
-
-#undef ST
-
- case END:
- fake_end:
- if (cur_eval) {
- /* we've just finished A in /(??{A})B/; now continue with B */
- I32 tmpix;
- st->u.eval.toggle_reg_flags
- = cur_eval->u.eval.toggle_reg_flags;
- PL_reg_flags ^= st->u.eval.toggle_reg_flags;
-
- st->u.eval.prev_rex = rex_sv; /* inner */
- SETREX(rex_sv,cur_eval->u.eval.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- cur_curlyx = cur_eval->u.eval.prev_curlyx;
- ReREFCNT_inc(rex_sv);
- st->u.eval.cp = regcppush(0); /* Save *all* the positions. */
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- REGCP_SET(st->u.eval.lastcp);
- PL_reginput = locinput;
-
- /* Restore parens of the outer rex without popping the
- * savestack */
- tmpix = PL_savestack_ix;
- PL_savestack_ix = cur_eval->u.eval.lastcp;
- regcppop(rex);
- PL_savestack_ix = tmpix;
-
- st->u.eval.prev_eval = cur_eval;
- cur_eval = cur_eval->u.eval.prev_eval;
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log, "%*s EVAL trying tail ... %"UVxf"\n",
- REPORT_CODE_OFF+depth*2, "",PTR2UV(cur_eval)););
- if ( nochange_depth )
- nochange_depth--;
-
- PUSH_YES_STATE_GOTO(EVAL_AB,
- st->u.eval.prev_eval->u.eval.B); /* match B */
- }
-
- if (locinput < reginfo->till) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n",
- PL_colors[4],
- (long)(locinput - PL_reg_starttry),
- (long)(reginfo->till - PL_reg_starttry),
- PL_colors[5]));
-
- sayNO_SILENT; /* Cannot match: too short. */
- }
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
- case SUCCEED: /* successful SUSPEND/UNLESSM/IFMATCH/CURLYM */
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %ssubpattern success...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]));
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
-#undef ST
-#define ST st->u.ifmatch
-
- case SUSPEND: /* (?>A) */
- ST.wanted = 1;
- PL_reginput = locinput;
- goto do_ifmatch;
-
- case UNLESSM: /* -ve lookaround: (?!A), or with flags, (?<!A) */
- ST.wanted = 0;
- goto ifmatch_trivial_fail_test;
-
- case IFMATCH: /* +ve lookaround: (?=A), or with flags, (?<=A) */
- ST.wanted = 1;
- ifmatch_trivial_fail_test:
- if (scan->flags) {
- char * const s = HOPBACKc(locinput, scan->flags);
- if (!s) {
- /* trivial fail */
- if (logical) {
- logical = 0;
- sw = 1 - (bool)ST.wanted;
- }
- else if (ST.wanted)
- sayNO;
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- }
- PL_reginput = s;
- }
- else
- PL_reginput = locinput;
-
- do_ifmatch:
- ST.me = scan;
- ST.logical = logical;
- logical = 0; /* XXX: reset state of logical once it has been saved into ST */
-
- /* execute body of (?...A) */
- PUSH_YES_STATE_GOTO(IFMATCH_A, NEXTOPER(NEXTOPER(scan)));
- /* NOTREACHED */
-
- case IFMATCH_A_fail: /* body of (?...A) failed */
- ST.wanted = !ST.wanted;
- /* FALL THROUGH */
-
- case IFMATCH_A: /* body of (?...A) succeeded */
- if (ST.logical) {
- sw = (bool)ST.wanted;
- }
- else if (!ST.wanted)
- sayNO;
-
- if (OP(ST.me) == SUSPEND)
- locinput = PL_reginput;
- else {
- locinput = PL_reginput = st->locinput;
- nextchr = UCHARAT(locinput);
- }
- scan = ST.me + ARG(ST.me);
- if (scan == ST.me)
- scan = NULL;
- continue; /* execute B */
-
-#undef ST
-
- case LONGJMP:
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- case COMMIT:
- reginfo->cutpoint = PL_regeol;
- /* FALLTHROUGH */
- case PRUNE:
- PL_reginput = locinput;
- if (!scan->flags)
- sv_yes_mark = sv_commit = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(COMMIT_next,next);
- /* NOTREACHED */
- case COMMIT_next_fail:
- no_final = 1;
- /* FALLTHROUGH */
- case OPFAIL:
- sayNO;
- /* NOTREACHED */
-
-#define ST st->u.mark
- case MARKPOINT:
- ST.prev_mark = mark_state;
- ST.mark_name = sv_commit = sv_yes_mark
- = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- mark_state = st;
- ST.mark_loc = PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(MARKPOINT_next,next);
- /* NOTREACHED */
- case MARKPOINT_next:
- mark_state = ST.prev_mark;
- sayYES;
- /* NOTREACHED */
- case MARKPOINT_next_fail:
- if (popmark && sv_eq(ST.mark_name,popmark))
- {
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- popmark = NULL; /* we found our mark */
- sv_commit = ST.mark_name;
-
- DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,
- "%*s %ssetting cutpoint to mark:%"SVf"...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], SVfARG(sv_commit), PL_colors[5]);
- });
- }
- mark_state = ST.prev_mark;
- sv_yes_mark = mark_state ?
- mark_state->u.mark.mark_name : NULL;
- sayNO;
- /* NOTREACHED */
- case SKIP:
- PL_reginput = locinput;
- if (scan->flags) {
- /* (*SKIP) : if we fail we cut here*/
- ST.mark_name = NULL;
- ST.mark_loc = locinput;
- PUSH_STATE_GOTO(SKIP_next,next);
- } else {
- /* (*SKIP:NAME) : if there is a (*MARK:NAME) fail where it was,
- otherwise do nothing. Meaning we need to scan
- */
- regmatch_state *cur = mark_state;
- SV *find = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
-
- while (cur) {
- if ( sv_eq( cur->u.mark.mark_name,
- find ) )
- {
- ST.mark_name = find;
- PUSH_STATE_GOTO( SKIP_next, next );
- }
- cur = cur->u.mark.prev_mark;
- }
- }
- /* Didn't find our (*MARK:NAME) so ignore this (*SKIP:NAME) */
- break;
- case SKIP_next_fail:
- if (ST.mark_name) {
- /* (*CUT:NAME) - Set up to search for the name as we
- collapse the stack*/
- popmark = ST.mark_name;
- } else {
- /* (*CUT) - No name, we cut here.*/
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- /* but we set sv_commit to latest mark_name if there
- is one so they can test to see how things lead to this
- cut */
- if (mark_state)
- sv_commit=mark_state->u.mark.mark_name;
- }
- no_final = 1;
- sayNO;
- /* NOTREACHED */
-#undef ST
- case FOLDCHAR:
- n = ARG(scan);
- if ( n == (U32)what_len_TRICKYFOLD(locinput,do_utf8,ln) ) {
- locinput += ln;
- } else if ( 0xDF == n && !do_utf8 && !UTF ) {
- sayNO;
- } else {
- U8 folded[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const char * const l = locinput;
- char *e = PL_regeol;
- to_uni_fold(n, folded, &foldlen);
-
- if (ibcmp_utf8((const char*) folded, 0, foldlen, 1,
- l, &e, 0, do_utf8)) {
- sayNO;
- }
- locinput = e;
- }
- nextchr = UCHARAT(locinput);
- break;
- case LNBREAK:
- if ((n=is_LNBREAK(locinput,do_utf8))) {
- locinput += n;
- nextchr = UCHARAT(locinput);
- } else
- sayNO;
- break;
-
-#define CASE_CLASS(nAmE) \
- case nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- locinput += n; \
- nextchr = UCHARAT(locinput); \
- } else \
- sayNO; \
- break; \
- case N##nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- sayNO; \
- } else { \
- locinput += UTF8SKIP(locinput); \
- nextchr = UCHARAT(locinput); \
- } \
- break
-
- CASE_CLASS(VERTWS);
- CASE_CLASS(HORIZWS);
-#undef CASE_CLASS
-
- default:
- PerlIO_printf(Perl_error_log, "%"UVxf" %d\n",
- PTR2UV(scan), OP(scan));
- Perl_croak(aTHX_ "regexp memory corruption");
-
- } /* end switch */
-
- /* switch break jumps here */
- scan = next; /* prepare to execute the next op and ... */
- continue; /* ... jump back to the top, reusing st */
- /* NOTREACHED */
-
- push_yes_state:
- /* push a state that backtracks on success */
- st->u.yes.prev_yes_state = yes_state;
- yes_state = st;
- /* FALL THROUGH */
- push_state:
- /* push a new regex state, then continue at scan */
- {
- regmatch_state *newst;
-
- DEBUG_STACK_r({
- regmatch_state *cur = st;
- regmatch_state *curyes = yes_state;
- int curd = depth;
- regmatch_slab *slab = PL_regmatch_slab;
- for (;curd > -1;cur--,curd--) {
- if (cur < SLAB_FIRST(slab)) {
- slab = slab->prev;
- cur = SLAB_LAST(slab);
- }
- PerlIO_printf(Perl_error_log, "%*s#%-3d %-10s %s\n",
- REPORT_CODE_OFF + 2 + depth * 2,"",
- curd, PL_reg_name[cur->resume_state],
- (curyes == cur) ? "yes" : ""
- );
- if (curyes == cur)
- curyes = cur->u.yes.prev_yes_state;
- }
- } else
- DEBUG_STATE_pp("push")
- );
- depth++;
- st->locinput = locinput;
- newst = st+1;
- if (newst > SLAB_LAST(PL_regmatch_slab))
- newst = S_push_slab(aTHX);
- PL_regmatch_state = newst;
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- st = newst;
- continue;
- /* NOTREACHED */
- }
- }
-
- /*
- * We get here only if there's trouble -- normally "case END" is
- * the terminating point.
- */
- Perl_croak(aTHX_ "corrupted regexp pointers");
- /*NOTREACHED*/
- sayNO;
-
-yes:
- if (yes_state) {
- /* we have successfully completed a subexpression, but we must now
- * pop to the state marked by yes_state and continue from there */
- assert(st != yes_state);
-#ifdef DEBUGGING
- while (st != yes_state) {
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- DEBUG_STATE_r({
- if (no_final) {
- DEBUG_STATE_pp("pop (no final)");
- } else {
- DEBUG_STATE_pp("pop (yes)");
- }
- });
- depth--;
- }
-#else
- while (yes_state < SLAB_FIRST(PL_regmatch_slab)
- || yes_state > SLAB_LAST(PL_regmatch_slab))
- {
- /* not in this slab, pop slab */
- depth -= (st - SLAB_FIRST(PL_regmatch_slab) + 1);
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- depth -= (st - yes_state);
-#endif
- st = yes_state;
- yes_state = st->u.yes.prev_yes_state;
- PL_regmatch_state = st;
-
- if (no_final) {
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
- }
- state_num = st->resume_state + no_final;
- goto reenter_switch;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n",
- PL_colors[4], PL_colors[5]));
-
- if (PL_reg_eval_set) {
- /* each successfully executed (?{...}) block does the equivalent of
- * local $^R = do {...}
- * When popping the save stack, all these locals would be undone;
- * bypass this by setting the outermost saved $^R to the latest
- * value */
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- }
- result = 1;
- goto final_exit;
-
-no:
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], PL_colors[5])
- );
-
-no_silent:
- if (no_final) {
- if (yes_state) {
- goto yes;
- } else {
- goto final_exit;
- }
- }
- if (depth) {
- /* there's a previous state to backtrack to */
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- PL_regmatch_state = st;
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
-
- DEBUG_STATE_pp("pop");
- depth--;
- if (yes_state == st)
- yes_state = st->u.yes.prev_yes_state;
-
- state_num = st->resume_state + 1; /* failure = success + 1 */
- goto reenter_switch;
- }
- result = 0;
-
- final_exit:
- if (rex->intflags & PREGf_VERBARG_SEEN) {
- SV *sv_err = get_sv("REGERROR", 1);
- SV *sv_mrk = get_sv("REGMARK", 1);
- if (result) {
- sv_commit = &PL_sv_no;
- if (!sv_yes_mark)
- sv_yes_mark = &PL_sv_yes;
- } else {
- if (!sv_commit)
- sv_commit = &PL_sv_yes;
- sv_yes_mark = &PL_sv_no;
- }
- sv_setsv(sv_err, sv_commit);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- /* clean up; in particular, free all slabs above current one */
- LEAVE_SCOPE(oldsave);
-
- return result;
-}
-
-/*
- - regrepeat - repeatedly match something simple, report how many
- */
-/*
- * [This routine now assumes that it will only match on things of length 1.
- * That was true before, but now we assume scan - reginput is the count,
- * rather than incrementing count on every character. [Er, except utf8.]]
- */
-STATIC I32
-S_regrepeat(pTHX_ const regexp *prog, const regnode *p, I32 max, int depth)
-{
- dVAR;
- register char *scan;
- register I32 c;
- register char *loceol = PL_regeol;
- register I32 hardcount = 0;
- register bool do_utf8 = PL_reg_match_utf8;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_REGREPEAT;
-
- scan = PL_reginput;
- if (max == REG_INFTY)
- max = I32_MAX;
- else if (max < loceol - scan)
- loceol = scan + max;
- switch (OP(p)) {
- case REG_ANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max && *scan != '\n') {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && *scan != '\n')
- scan++;
- }
- break;
- case SANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- }
- else
- scan = loceol;
- break;
- case CANY:
- scan = loceol;
- break;
- case EXACT: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol && UCHARAT(scan) == c)
- scan++;
- break;
- case EXACTF: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c]))
- scan++;
- break;
- case EXACTFL: /* length of string is 1 */
- PL_reg_flags |= RF_tainted;
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c]))
- scan++;
- break;
- case ANYOF:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- reginclass(prog, p, (U8*)scan, 0, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && REGINCLASS(prog, p, (U8*)scan))
- scan++;
- }
- break;
- case ALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM(*scan))
- scan++;
- }
- break;
- case ALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM_LC(*scan))
- scan++;
- }
- break;
- case NALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM(*scan))
- scan++;
- }
- break;
- case NALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM_LC(*scan))
- scan++;
- }
- break;
- case SPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE(*scan))
- scan++;
- }
- break;
- case SPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE_LC(*scan))
- scan++;
- }
- break;
- case NSPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE(*scan))
- scan++;
- }
- break;
- case NSPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE_LC(*scan))
- scan++;
- }
- break;
- case DIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isDIGIT(*scan))
- scan++;
- }
- break;
- case NDIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isDIGIT(*scan))
- scan++;
- }
- case LNBREAK:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_LNBREAK_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- /*
- LNBREAK can match two latin chars, which is ok,
- because we have a null terminated string, but we
- have to use hardcount in this situation
- */
- while (scan < loceol && (c=is_LNBREAK_latin1(scan))) {
- scan+=c;
- hardcount++;
- }
- }
- break;
- case HORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_HORIZWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_HORIZWS_latin1(scan))
- scan++;
- }
- break;
- case NHORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_HORIZWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_HORIZWS_latin1(scan))
- scan++;
-
- }
- break;
- case VERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_VERTWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
- case NVERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_VERTWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
-
- default: /* Called on something of 0 width. */
- break; /* So match right here or not at all. */
- }
-
- if (hardcount)
- c = hardcount;
- else
- c = scan - PL_reginput;
- PL_reginput = scan;
-
- DEBUG_r({
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, p);
- PerlIO_printf(Perl_debug_log,
- "%*s %s can match %"IVdf" times out of %"IVdf"...\n",
- REPORT_CODE_OFF + depth*2, "", SvPVX_const(prop),(IV)c,(IV)max);
- });
- });
-
- return(c);
-}
-
-
-#if !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION)
-/*
-- regclass_swash - prepare the utf8 swash
-*/
-
-SV *
-Perl_regclass_swash(pTHX_ const regexp *prog, register const regnode* node, bool doinit, SV** listsvp, SV **altsvp)
-{
- dVAR;
- SV *sw = NULL;
- SV *si = NULL;
- SV *alt = NULL;
- RXi_GET_DECL(prog,progi);
- const struct reg_data * const data = prog ? progi->data : NULL;
-
- PERL_ARGS_ASSERT_REGCLASS_SWASH;
-
- if (data && data->count) {
- const U32 n = ARG(node);
-
- if (data->what[n] == 's') {
- SV * const rv = MUTABLE_SV(data->data[n]);
- AV * const av = MUTABLE_AV(SvRV(rv));
- SV **const ary = AvARRAY(av);
- SV **a, **b;
-
- /* See the end of regcomp.c:S_regclass() for
- * documentation of these array elements. */
-
- si = *ary;
- a = SvROK(ary[1]) ? &ary[1] : NULL;
- b = SvTYPE(ary[2]) == SVt_PVAV ? &ary[2] : NULL;
-
- if (a)
- sw = *a;
- else if (si && doinit) {
- sw = swash_init("utf8", "", si, 1, 0);
- (void)av_store(av, 1, sw);
- }
- if (b)
- alt = *b;
- }
- }
-
- if (listsvp)
- *listsvp = si;
- if (altsvp)
- *altsvp = alt;
-
- return sw;
-}
-#endif
-
-/*
- - reginclass - determine if a character falls into a character class
-
- The n is the ANYOF regnode, the p is the target string, lenp
- is pointer to the maximum length of how far to go in the p
- (if the lenp is zero, UTF8SKIP(p) is used),
- do_utf8 tells whether the target string is in UTF-8.
-
- */
-
-STATIC bool
-S_reginclass(pTHX_ const regexp *prog, register const regnode *n, register const U8* p, STRLEN* lenp, register bool do_utf8)
-{
- dVAR;
- const char flags = ANYOF_FLAGS(n);
- bool match = FALSE;
- UV c = *p;
- STRLEN len = 0;
- STRLEN plen;
-
- PERL_ARGS_ASSERT_REGINCLASS;
-
- if (do_utf8 && !UTF8_IS_INVARIANT(c)) {
- c = utf8n_to_uvchr(p, UTF8_MAXBYTES, &len,
- (UTF8_ALLOW_DEFAULT & UTF8_ALLOW_ANYUV)
- | UTF8_ALLOW_FFFF | UTF8_CHECK_ONLY);
- /* see [perl #37836] for UTF8_ALLOW_ANYUV; [perl #38293] for
- * UTF8_ALLOW_FFFF */
- if (len == (STRLEN)-1)
- Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)");
- }
-
- plen = lenp ? *lenp : UNISKIP(NATIVE_TO_UNI(c));
- if (do_utf8 || (flags & ANYOF_UNICODE)) {
- if (lenp)
- *lenp = 0;
- if (do_utf8 && !ANYOF_RUNTIME(n)) {
- if (len != (STRLEN)-1 && c < 256 && ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- }
- if (!match && do_utf8 && (flags & ANYOF_UNICODE_ALL) && c >= 256)
- match = TRUE;
- if (!match) {
- AV *av;
- SV * const sw = regclass_swash(prog, n, TRUE, 0, (SV**)&av);
-
- if (sw) {
- U8 * utf8_p;
- if (do_utf8) {
- utf8_p = (U8 *) p;
- } else {
- STRLEN len = 1;
- utf8_p = bytes_to_utf8(p, &len);
- }
- if (swash_fetch(sw, utf8_p, 1))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- if (!match && lenp && av) {
- I32 i;
- for (i = 0; i <= av_len(av); i++) {
- SV* const sv = *av_fetch(av, i, FALSE);
- STRLEN len;
- const char * const s = SvPV_const(sv, len);
- if (len <= plen && memEQ(s, (char*)utf8_p, len)) {
- *lenp = len;
- match = TRUE;
- break;
- }
- }
- }
- if (!match) {
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1];
-
- STRLEN tmplen;
- to_utf8_fold(utf8_p, tmpbuf, &tmplen);
- if (swash_fetch(sw, tmpbuf, 1))
- match = TRUE;
- }
- }
-
- /* If we allocated a string above, free it */
- if (! do_utf8) Safefree(utf8_p);
- }
- }
- if (match && lenp && *lenp == 0)
- *lenp = UNISKIP(NATIVE_TO_UNI(c));
- }
- if (!match && c < 256) {
- if (ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- U8 f;
-
- if (flags & ANYOF_LOCALE) {
- PL_reg_flags |= RF_tainted;
- f = PL_fold_locale[c];
- }
- else
- f = PL_fold[c];
- if (f != c && ANYOF_BITMAP_TEST(n, f))
- match = TRUE;
- }
-
- if (!match && (flags & ANYOF_CLASS)) {
- PL_reg_flags |= RF_tainted;
- if (
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK(c))
- ) /* How's that for a conditional? */
- {
- match = TRUE;
- }
- }
- }
-
- return (flags & ANYOF_INVERT) ? !match : match;
-}
-
-STATIC U8 *
-S_reghop3(U8 *s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-
-#ifdef XXX_dmq
-/* there are a bunch of places where we use two reghop3's that should
- be replaced with this routine. but since thats not done yet
- we ifdef it out - dmq
-*/
-STATIC U8 *
-S_reghop4(U8 *s, I32 off, const U8* llim, const U8* rlim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP4;
-
- if (off >= 0) {
- while (off-- && s < rlim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > llim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > llim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-#endif
-
-STATIC U8 *
-S_reghopmaybe3(U8* s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOPMAYBE3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- if (off >= 0)
- return NULL;
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- if (off <= 0)
- return NULL;
- }
- return s;
-}
-
-static void
-restore_pos(pTHX_ void *arg)
-{
- dVAR;
- regexp * const rex = (regexp *)arg;
- if (PL_reg_eval_set) {
- if (PL_reg_oldsaved) {
- rex->subbeg = PL_reg_oldsaved;
- rex->sublen = PL_reg_oldsavedlen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- rex->saved_copy = PL_nrs;
-#endif
- RXp_MATCH_COPIED_on(rex);
- }
- PL_reg_magic->mg_len = PL_reg_oldpos;
- PL_reg_eval_set = 0;
- PL_curpm = PL_reg_oldcurpm;
- }
-}
-
-STATIC void
-S_to_utf8_substr(pTHX_ register regexp *prog)
-{
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_UTF8_SUBSTR;
-
- do {
- if (prog->substrs->data[i].substr
- && !prog->substrs->data[i].utf8_substr) {
- SV* const sv = newSVsv(prog->substrs->data[i].substr);
- prog->substrs->data[i].utf8_substr = sv;
- sv_utf8_upgrade(sv);
- if (SvVALID(prog->substrs->data[i].substr)) {
- const U8 flags = BmFLAGS(prog->substrs->data[i].substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- /* Whilst this makes the SV technically "invalid" (as its
- buffer is no longer followed by "\0") when fbm_compile()
- adds the "\n" back, a "\0" is restored. */
- }
- fbm_compile(sv, flags);
- }
- if (prog->substrs->data[i].substr == prog->check_substr)
- prog->check_utf8 = sv;
- }
- } while (i--);
-}
-
-STATIC void
-S_to_byte_substr(pTHX_ register regexp *prog)
-{
- dVAR;
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_BYTE_SUBSTR;
-
- do {
- if (prog->substrs->data[i].utf8_substr
- && !prog->substrs->data[i].substr) {
- SV* sv = newSVsv(prog->substrs->data[i].utf8_substr);
- if (sv_utf8_downgrade(sv, TRUE)) {
- if (SvVALID(prog->substrs->data[i].utf8_substr)) {
- const U8 flags
- = BmFLAGS(prog->substrs->data[i].utf8_substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- }
- fbm_compile(sv, flags);
- }
- } else {
- SvREFCNT_dec(sv);
- sv = &PL_sv_undef;
- }
- prog->substrs->data[i].substr = sv;
- if (prog->substrs->data[i].utf8_substr == prog->check_utf8)
- prog->check_substr = sv;
- }
- } while (i--);
-}
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regcomp.c
- */
-
-/*
- * 'A fair jaw-cracker dwarf-language must be.' --Samwise Gamgee
- *
- * [p.285 of _The Lord of the Rings_, II/iii: "The Ring Goes South"]
- */
-
-/* This file contains functions for compiling a regular expression. See
- * also regexec.c which funnily enough, contains functions for executing
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_comp.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
-
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGCOMP_C
-#include "perl.h"
-
-#ifndef PERL_IN_XSUB_RE
-#include "re_defs.h"
-#endif
-
-#define REG_COMP_C
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#ifdef op
-#undef op
-#endif /* op */
-
-#ifdef MSDOS
-# if defined(BUGGY_MSC6)
- /* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */
-# pragma optimize("a",off)
- /* But MSC 6.00A is happy with 'w', for aliases only across function calls*/
-# pragma optimize("w",on )
-# endif /* BUGGY_MSC6 */
-#endif /* MSDOS */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-typedef struct RExC_state_t {
- U32 flags; /* are we folding, multilining? */
- char *precomp; /* uncompiled string. */
- REGEXP *rx_sv; /* The SV that is the regexp. */
- regexp *rx; /* perl core regexp structure */
- regexp_internal *rxi; /* internal data for regexp object pprivate field */
- char *start; /* Start of input for compile */
- char *end; /* End of input for compile */
- char *parse; /* Input-scan pointer. */
- I32 whilem_seen; /* number of WHILEM in this expr */
- regnode *emit_start; /* Start of emitted-code area */
- regnode *emit_bound; /* First regnode outside of the allocated space */
- regnode *emit; /* Code-emit pointer; ®dummy = don't = compiling */
- I32 naughty; /* How bad is this pattern? */
- I32 sawback; /* Did we see \1, ...? */
- U32 seen;
- I32 size; /* Code size. */
- I32 npar; /* Capture buffer count, (OPEN). */
- I32 cpar; /* Capture buffer count, (CLOSE). */
- I32 nestroot; /* root parens we are in - used by accept */
- I32 extralen;
- I32 seen_zerolen;
- I32 seen_evals;
- regnode **open_parens; /* pointers to open parens */
- regnode **close_parens; /* pointers to close parens */
- regnode *opend; /* END node in program */
- I32 utf8; /* whether the pattern is utf8 or not */
- I32 orig_utf8; /* whether the pattern was originally in utf8 */
- /* XXX use this for future optimisation of case
- * where pattern must be upgraded to utf8. */
- HV *charnames; /* cache of named sequences */
- HV *paren_names; /* Paren names */
-
- regnode **recurse; /* Recurse regops */
- I32 recurse_count; /* Number of recurse regops */
-#if ADD_TO_REGEXEC
- char *starttry; /* -Dr: where regtry was called. */
-#define RExC_starttry (pRExC_state->starttry)
-#endif
-#ifdef DEBUGGING
- const char *lastparse;
- I32 lastnum;
- AV *paren_name_list; /* idx -> name */
-#define RExC_lastparse (pRExC_state->lastparse)
-#define RExC_lastnum (pRExC_state->lastnum)
-#define RExC_paren_name_list (pRExC_state->paren_name_list)
-#endif
-} RExC_state_t;
-
-#define RExC_flags (pRExC_state->flags)
-#define RExC_precomp (pRExC_state->precomp)
-#define RExC_rx_sv (pRExC_state->rx_sv)
-#define RExC_rx (pRExC_state->rx)
-#define RExC_rxi (pRExC_state->rxi)
-#define RExC_start (pRExC_state->start)
-#define RExC_end (pRExC_state->end)
-#define RExC_parse (pRExC_state->parse)
-#define RExC_whilem_seen (pRExC_state->whilem_seen)
-#ifdef RE_TRACK_PATTERN_OFFSETS
-#define RExC_offsets (pRExC_state->rxi->u.offsets) /* I am not like the others */
-#endif
-#define RExC_emit (pRExC_state->emit)
-#define RExC_emit_start (pRExC_state->emit_start)
-#define RExC_emit_bound (pRExC_state->emit_bound)
-#define RExC_naughty (pRExC_state->naughty)
-#define RExC_sawback (pRExC_state->sawback)
-#define RExC_seen (pRExC_state->seen)
-#define RExC_size (pRExC_state->size)
-#define RExC_npar (pRExC_state->npar)
-#define RExC_nestroot (pRExC_state->nestroot)
-#define RExC_extralen (pRExC_state->extralen)
-#define RExC_seen_zerolen (pRExC_state->seen_zerolen)
-#define RExC_seen_evals (pRExC_state->seen_evals)
-#define RExC_utf8 (pRExC_state->utf8)
-#define RExC_orig_utf8 (pRExC_state->orig_utf8)
-#define RExC_charnames (pRExC_state->charnames)
-#define RExC_open_parens (pRExC_state->open_parens)
-#define RExC_close_parens (pRExC_state->close_parens)
-#define RExC_opend (pRExC_state->opend)
-#define RExC_paren_names (pRExC_state->paren_names)
-#define RExC_recurse (pRExC_state->recurse)
-#define RExC_recurse_count (pRExC_state->recurse_count)
-
-
-#define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?')
-#define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \
- ((*s) == '{' && regcurly(s)))
-
-#ifdef SPSTART
-#undef SPSTART /* dratted cpp namespace... */
-#endif
-/*
- * Flags to be passed up and down.
- */
-#define WORST 0 /* Worst case. */
-#define HASWIDTH 0x01 /* Known to match non-null strings. */
-#define SIMPLE 0x02 /* Simple enough to be STAR/PLUS operand. */
-#define SPSTART 0x04 /* Starts with * or +. */
-#define TRYAGAIN 0x08 /* Weeded out a declaration. */
-#define POSTPONED 0x10 /* (?1),(?&name), (??{...}) or similar */
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-RExC_emit_start) : -1)
-
-/* whether trie related optimizations are enabled */
-#if PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION
-#define TRIE_STUDY_OPT
-#define FULL_TRIE_STUDY
-#define TRIE_STCLASS
-#endif
-
-
-
-#define PBYTE(u8str,paren) ((U8*)(u8str))[(paren) >> 3]
-#define PBITVAL(paren) (1 << ((paren) & 7))
-#define PAREN_TEST(u8str,paren) ( PBYTE(u8str,paren) & PBITVAL(paren))
-#define PAREN_SET(u8str,paren) PBYTE(u8str,paren) |= PBITVAL(paren)
-#define PAREN_UNSET(u8str,paren) PBYTE(u8str,paren) &= (~PBITVAL(paren))
-
-
-/* About scan_data_t.
-
- During optimisation we recurse through the regexp program performing
- various inplace (keyhole style) optimisations. In addition study_chunk
- and scan_commit populate this data structure with information about
- what strings MUST appear in the pattern. We look for the longest
- string that must appear for at a fixed location, and we look for the
- longest string that may appear at a floating location. So for instance
- in the pattern:
-
- /FOO[xX]A.*B[xX]BAR/
-
- Both 'FOO' and 'A' are fixed strings. Both 'B' and 'BAR' are floating
- strings (because they follow a .* construct). study_chunk will identify
- both FOO and BAR as being the longest fixed and floating strings respectively.
-
- The strings can be composites, for instance
-
- /(f)(o)(o)/
-
- will result in a composite fixed substring 'foo'.
-
- For each string some basic information is maintained:
-
- - offset or min_offset
- This is the position the string must appear at, or not before.
- It also implicitly (when combined with minlenp) tells us how many
- character must match before the string we are searching.
- Likewise when combined with minlenp and the length of the string
- tells us how many characters must appear after the string we have
- found.
-
- - max_offset
- Only used for floating strings. This is the rightmost point that
- the string can appear at. Ifset to I32 max it indicates that the
- string can occur infinitely far to the right.
-
- - minlenp
- A pointer to the minimum length of the pattern that the string
- was found inside. This is important as in the case of positive
- lookahead or positive lookbehind we can have multiple patterns
- involved. Consider
-
- /(?=FOO).*F/
-
- The minimum length of the pattern overall is 3, the minimum length
- of the lookahead part is 3, but the minimum length of the part that
- will actually match is 1. So 'FOO's minimum length is 3, but the
- minimum length for the F is 1. This is important as the minimum length
- is used to determine offsets in front of and behind the string being
- looked for. Since strings can be composites this is the length of the
- pattern at the time it was commited with a scan_commit. Note that
- the length is calculated by study_chunk, so that the minimum lengths
- are not known until the full pattern has been compiled, thus the
- pointer to the value.
-
- - lookbehind
-
- In the case of lookbehind the string being searched for can be
- offset past the start point of the final matching string.
- If this value was just blithely removed from the min_offset it would
- invalidate some of the calculations for how many chars must match
- before or after (as they are derived from min_offset and minlen and
- the length of the string being searched for).
- When the final pattern is compiled and the data is moved from the
- scan_data_t structure into the regexp structure the information
- about lookbehind is factored in, with the information that would
- have been lost precalculated in the end_shift field for the
- associated string.
-
- The fields pos_min and pos_delta are used to store the minimum offset
- and the delta to the maximum offset at the current point in the pattern.
-
-*/
-
-typedef struct scan_data_t {
- /*I32 len_min; unused */
- /*I32 len_delta; unused */
- I32 pos_min;
- I32 pos_delta;
- SV *last_found;
- I32 last_end; /* min value, <0 unless valid. */
- I32 last_start_min;
- I32 last_start_max;
- SV **longest; /* Either &l_fixed, or &l_float. */
- SV *longest_fixed; /* longest fixed string found in pattern */
- I32 offset_fixed; /* offset where it starts */
- I32 *minlen_fixed; /* pointer to the minlen relevent to the string */
- I32 lookbehind_fixed; /* is the position of the string modfied by LB */
- SV *longest_float; /* longest floating string found in pattern */
- I32 offset_float_min; /* earliest point in string it can appear */
- I32 offset_float_max; /* latest point in string it can appear */
- I32 *minlen_float; /* pointer to the minlen relevent to the string */
- I32 lookbehind_float; /* is the position of the string modified by LB */
- I32 flags;
- I32 whilem_c;
- I32 *last_closep;
- struct regnode_charclass_class *start_class;
-} scan_data_t;
-
-/*
- * Forward declarations for pregcomp()'s friends.
- */
-
-static const scan_data_t zero_scan_data =
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0};
-
-#define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL)
-#define SF_BEFORE_SEOL 0x0001
-#define SF_BEFORE_MEOL 0x0002
-#define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL)
-#define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL)
-
-#ifdef NO_UNARY_PLUS
-# define SF_FIX_SHIFT_EOL (0+2)
-# define SF_FL_SHIFT_EOL (0+4)
-#else
-# define SF_FIX_SHIFT_EOL (+2)
-# define SF_FL_SHIFT_EOL (+4)
-#endif
-
-#define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL)
-#define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL)
-
-#define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL)
-#define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */
-#define SF_IS_INF 0x0040
-#define SF_HAS_PAR 0x0080
-#define SF_IN_PAR 0x0100
-#define SF_HAS_EVAL 0x0200
-#define SCF_DO_SUBSTR 0x0400
-#define SCF_DO_STCLASS_AND 0x0800
-#define SCF_DO_STCLASS_OR 0x1000
-#define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR)
-#define SCF_WHILEM_VISITED_POS 0x2000
-
-#define SCF_TRIE_RESTUDY 0x4000 /* Do restudy? */
-#define SCF_SEEN_ACCEPT 0x8000
-
-#define UTF (RExC_utf8 != 0)
-#define LOC ((RExC_flags & RXf_PMf_LOCALE) != 0)
-#define FOLD ((RExC_flags & RXf_PMf_FOLD) != 0)
-
-#define OOB_UNICODE 12345678
-#define OOB_NAMEDCLASS -1
-
-#define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b)
-
-
-/* length of regex to show in messages that don't mark a position within */
-#define RegexLengthToShowInErrorMessages 127
-
-/*
- * If MARKER[12] are adjusted, be sure to adjust the constants at the top
- * of t/op/regmesg.t, the tests in t/op/re_tests, and those in
- * op/pragma/warn/regcomp.
- */
-#define MARKER1 "<-- HERE" /* marker as it appears in the description */
-#define MARKER2 " <-- HERE " /* marker as it appears within the regex */
-
-#define REPORT_LOCATION " in regex; marked by " MARKER1 " in m/%.*s" MARKER2 "%s/"
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given
- * arg. Show regex, up to a maximum length. If it's too long, chop and add
- * "...".
- */
-#define _FAIL(code) STMT_START { \
- const char *ellipses = ""; \
- IV len = RExC_end - RExC_precomp; \
- \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- if (len > RegexLengthToShowInErrorMessages) { \
- /* chop 10 shorter than the max, to ensure meaning of "..." */ \
- len = RegexLengthToShowInErrorMessages - 10; \
- ellipses = "..."; \
- } \
- code; \
-} STMT_END
-
-#define FAIL(msg) _FAIL( \
- Perl_croak(aTHX_ "%s in regex m/%.*s%s/", \
- msg, (int)len, RExC_precomp, ellipses))
-
-#define FAIL2(msg,arg) _FAIL( \
- Perl_croak(aTHX_ msg " in regex m/%.*s%s/", \
- arg, (int)len, RExC_precomp, ellipses))
-
-/*
- * Simple_vFAIL -- like FAIL, but marks the current location in the scan
- */
-#define Simple_vFAIL(m) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- Perl_croak(aTHX_ "%s" REPORT_LOCATION, \
- m, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL()
- */
-#define vFAIL(m) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL(m); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts two arguments.
- */
-#define Simple_vFAIL2(m,a1) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2().
- */
-#define vFAIL2(m,a1) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL2(m, a1); \
-} STMT_END
-
-
-/*
- * Like Simple_vFAIL(), but accepts three arguments.
- */
-#define Simple_vFAIL3(m, a1, a2) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3().
- */
-#define vFAIL3(m,a1,a2) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL3(m, a1, a2); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts four arguments.
- */
-#define Simple_vFAIL4(m, a1, a2, a3) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNreg(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNregdep(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_REGEXP), \
- m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN2reg(loc, m, a1) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN3(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN3reg(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN4(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN4reg(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN5(loc, m, a1, a2, a3, a4) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, a4, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-
-/* Allow for side effects in s */
-#define REGC(c,s) STMT_START { \
- if (!SIZE_ONLY) *(s) = (c); else (void)(s); \
-} STMT_END
-
-/* Macros for recording node offsets. 20001227 mjd@plover.com
- * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in
- * element 2*n-1 of the array. Element #2n holds the byte length node #n.
- * Element 0 holds the number n.
- * Position is 1 indexed.
- */
-#ifndef RE_TRACK_PATTERN_OFFSETS
-#define Set_Node_Offset_To_R(node,byte)
-#define Set_Node_Offset(node,byte)
-#define Set_Cur_Node_Offset
-#define Set_Node_Length_To_R(node,len)
-#define Set_Node_Length(node,len)
-#define Set_Node_Cur_Length(node)
-#define Node_Offset(n)
-#define Node_Length(n)
-#define Set_Node_Offset_Length(node,offset,len)
-#define ProgLen(ri) ri->u.proglen
-#define SetProgLen(ri,x) ri->u.proglen = x
-#else
-#define ProgLen(ri) ri->u.offsets[0]
-#define SetProgLen(ri,x) ri->u.offsets[0] = x
-#define Set_Node_Offset_To_R(node,byte) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) offset of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(byte))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Offset macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)-1] = (byte); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Offset(node,byte) \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start)
-#define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse)
-
-#define Set_Node_Length_To_R(node,len) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) size of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(len))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Length macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)] = (len); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Length(node,len) \
- Set_Node_Length_To_R((node)-RExC_emit_start, len)
-#define Set_Cur_Node_Length(len) Set_Node_Length(RExC_emit, len)
-#define Set_Node_Cur_Length(node) \
- Set_Node_Length(node, RExC_parse - parse_start)
-
-/* Get offsets and lengths */
-#define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1])
-#define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)])
-
-#define Set_Node_Offset_Length(node,offset,len) STMT_START { \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (offset)); \
- Set_Node_Length_To_R((node)-RExC_emit_start, (len)); \
-} STMT_END
-#endif
-
-#if PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS
-#define EXPERIMENTAL_INPLACESCAN
-#endif /*RE_TRACK_PATTERN_OFFSETS*/
-
-#define DEBUG_STUDYDATA(str,data,depth) \
-DEBUG_OPTIMISE_MORE_r(if(data){ \
- PerlIO_printf(Perl_debug_log, \
- "%*s" str "Pos:%"IVdf"/%"IVdf \
- " Flags: 0x%"UVXf" Whilem_c: %"IVdf" Lcp: %"IVdf" %s", \
- (int)(depth)*2, "", \
- (IV)((data)->pos_min), \
- (IV)((data)->pos_delta), \
- (UV)((data)->flags), \
- (IV)((data)->whilem_c), \
- (IV)((data)->last_closep ? *((data)->last_closep) : -1), \
- is_inf ? "INF " : "" \
- ); \
- if ((data)->last_found) \
- PerlIO_printf(Perl_debug_log, \
- "Last:'%s' %"IVdf":%"IVdf"/%"IVdf" %sFixed:'%s' @ %"IVdf \
- " %sFloat: '%s' @ %"IVdf"/%"IVdf"", \
- SvPVX_const((data)->last_found), \
- (IV)((data)->last_end), \
- (IV)((data)->last_start_min), \
- (IV)((data)->last_start_max), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_fixed)) ? "*" : "", \
- SvPVX_const((data)->longest_fixed), \
- (IV)((data)->offset_fixed), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_float)) ? "*" : "", \
- SvPVX_const((data)->longest_float), \
- (IV)((data)->offset_float_min), \
- (IV)((data)->offset_float_max) \
- ); \
- PerlIO_printf(Perl_debug_log,"\n"); \
-});
-
-static void clear_re(pTHX_ void *r);
-
-/* Mark that we cannot extend a found fixed substring at this point.
- Update the longest found anchored substring and the longest found
- floating substrings if needed. */
-
-STATIC void
-S_scan_commit(pTHX_ const RExC_state_t *pRExC_state, scan_data_t *data, I32 *minlenp, int is_inf)
-{
- const STRLEN l = CHR_SVLEN(data->last_found);
- const STRLEN old_l = CHR_SVLEN(*data->longest);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_SCAN_COMMIT;
-
- if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) {
- SvSetMagicSV(*data->longest, data->last_found);
- if (*data->longest == data->longest_fixed) {
- data->offset_fixed = l ? data->last_start_min : data->pos_min;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL);
- else
- data->flags &= ~SF_FIX_BEFORE_EOL;
- data->minlen_fixed=minlenp;
- data->lookbehind_fixed=0;
- }
- else { /* *data->longest == data->longest_float */
- data->offset_float_min = l ? data->last_start_min : data->pos_min;
- data->offset_float_max = (l
- ? data->last_start_max
- : data->pos_min + data->pos_delta);
- if (is_inf || (U32)data->offset_float_max > (U32)I32_MAX)
- data->offset_float_max = I32_MAX;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL);
- else
- data->flags &= ~SF_FL_BEFORE_EOL;
- data->minlen_float=minlenp;
- data->lookbehind_float=0;
- }
- }
- SvCUR_set(data->last_found, 0);
- {
- SV * const sv = data->last_found;
- if (SvUTF8(sv) && SvMAGICAL(sv)) {
- MAGIC * const mg = mg_find(sv, PERL_MAGIC_utf8);
- if (mg)
- mg->mg_len = 0;
- }
- }
- data->last_end = -1;
- data->flags &= ~SF_BEFORE_EOL;
- DEBUG_STUDYDATA("commit: ",data,0);
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_anything(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_ANYTHING;
-
- ANYOF_CLASS_ZERO(cl);
- ANYOF_BITMAP_SETALL(cl);
- cl->flags = ANYOF_EOS|ANYOF_UNICODE_ALL;
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* Can match anything (initialization) */
-STATIC int
-S_cl_is_anything(const struct regnode_charclass_class *cl)
-{
- int value;
-
- PERL_ARGS_ASSERT_CL_IS_ANYTHING;
-
- for (value = 0; value <= ANYOF_MAX; value += 2)
- if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1))
- return 1;
- if (!(cl->flags & ANYOF_UNICODE_ALL))
- return 0;
- if (!ANYOF_BITMAP_TESTALLSET((const void*)cl))
- return 0;
- return 1;
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_init(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
-}
-
-STATIC void
-S_cl_init_zero(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT_ZERO;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* 'And' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_and(struct regnode_charclass_class *cl,
- const struct regnode_charclass_class *and_with)
-{
- PERL_ARGS_ASSERT_CL_AND;
-
- assert(and_with->type == ANYOF);
- if (!(and_with->flags & ANYOF_CLASS)
- && !(cl->flags & ANYOF_CLASS)
- && (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(and_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD)) {
- int i;
-
- if (and_with->flags & ANYOF_INVERT)
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= ~and_with->bitmap[i];
- else
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= and_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise, leave it along for a moment. */
- if (!(and_with->flags & ANYOF_EOS))
- cl->flags &= ~ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE_ALL && and_with->flags & ANYOF_UNICODE &&
- !(and_with->flags & ANYOF_INVERT)) {
- cl->flags &= ~ANYOF_UNICODE_ALL;
- cl->flags |= ANYOF_UNICODE;
- ARG_SET(cl, ARG(and_with));
- }
- if (!(and_with->flags & ANYOF_UNICODE_ALL) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE_ALL;
- if (!(and_with->flags & (ANYOF_UNICODE|ANYOF_UNICODE_ALL)) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE;
-}
-
-/* 'OR' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_or(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl, const struct regnode_charclass_class *or_with)
-{
- PERL_ARGS_ASSERT_CL_OR;
-
- if (or_with->flags & ANYOF_INVERT) {
- /* We do not use
- * (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2))
- * <= (B1 | !B2) | (CL1 | !CL2)
- * which is wasteful if CL2 is small, but we ignore CL2:
- * (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1
- * XXXX Can we handle case-fold? Unclear:
- * (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) =
- * (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i'))
- */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(or_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD) ) {
- int i;
-
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= ~or_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise */
- else {
- cl_anything(pRExC_state, cl);
- }
- } else {
- /* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && (!(or_with->flags & ANYOF_FOLD)
- || (cl->flags & ANYOF_FOLD)) ) {
- int i;
-
- /* OR char bitmap and class bitmap separately */
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= or_with->bitmap[i];
- if (or_with->flags & ANYOF_CLASS) {
- for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++)
- cl->classflags[i] |= or_with->classflags[i];
- cl->flags |= ANYOF_CLASS;
- }
- }
- else { /* XXXX: logic is complicated, leave it along for a moment. */
- cl_anything(pRExC_state, cl);
- }
- }
- if (or_with->flags & ANYOF_EOS)
- cl->flags |= ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE && or_with->flags & ANYOF_UNICODE &&
- ARG(cl) != ARG(or_with)) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
- if (or_with->flags & ANYOF_UNICODE_ALL) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
-}
-
-#define TRIE_LIST_ITEM(state,idx) (trie->states[state].trans.list)[ idx ]
-#define TRIE_LIST_CUR(state) ( TRIE_LIST_ITEM( state, 0 ).forid )
-#define TRIE_LIST_LEN(state) ( TRIE_LIST_ITEM( state, 0 ).newstate )
-#define TRIE_LIST_USED(idx) ( trie->states[state].trans.list ? (TRIE_LIST_CUR( idx ) - 1) : 0 )
-
-
-#ifdef DEBUGGING
-/*
- dump_trie(trie,widecharmap,revcharmap)
- dump_trie_interim_list(trie,widecharmap,revcharmap,next_alloc)
- dump_trie_interim_table(trie,widecharmap,revcharmap,next_alloc)
-
- These routines dump out a trie in a somewhat readable format.
- The _interim_ variants are used for debugging the interim
- tables that are used to generate the final compressed
- representation which is what dump_trie expects.
-
- Part of the reason for their existance is to provide a form
- of documentation as to how the different representations function.
-
-*/
-
-/*
- Dumps the final compressed table form of the trie to Perl_debug_log.
- Used for debugging make_trie().
-*/
-
-STATIC void
-S_dump_trie(pTHX_ const struct _reg_trie_data *trie, HV *widecharmap,
- AV *revcharmap, U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE;
-
- PerlIO_printf( Perl_debug_log, "%*sChar : %-6s%-6s%-4s ",
- (int)depth * 2 + 2,"",
- "Match","Base","Ofs" );
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ ) {
- SV ** const tmp = av_fetch( revcharmap, state, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
- PerlIO_printf( Perl_debug_log, "\n%*sState|-----------------------",
- (int)depth * 2 + 2,"");
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ )
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth, "--------");
- PerlIO_printf( Perl_debug_log, "\n");
-
- for( state = 1 ; state < trie->statecount ; state++ ) {
- const U32 base = trie->states[ state ].trans.base;
-
- PerlIO_printf( Perl_debug_log, "%*s#%4"UVXf"|", (int)depth * 2 + 2,"", (UV)state);
-
- if ( trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " W%4X", trie->states[ state ].wordnum );
- } else {
- PerlIO_printf( Perl_debug_log, "%6s", "" );
- }
-
- PerlIO_printf( Perl_debug_log, " @%4"UVXf" ", (UV)base );
-
- if ( base ) {
- U32 ofs = 0;
-
- while( ( base + ofs < trie->uniquecharcount ) ||
- ( base + ofs - trie->uniquecharcount < trie->lasttrans
- && trie->trans[ base + ofs - trie->uniquecharcount ].check != state))
- ofs++;
-
- PerlIO_printf( Perl_debug_log, "+%2"UVXf"[ ", (UV)ofs);
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- PerlIO_printf( Perl_debug_log, "%*"UVXf,
- colwidth,
- (UV)trie->trans[ base + ofs - trie->uniquecharcount ].next );
- } else {
- PerlIO_printf( Perl_debug_log, "%*s",colwidth," ." );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "]");
-
- }
- PerlIO_printf( Perl_debug_log, "\n" );
- }
-}
-/*
- Dumps a fully constructed but uncompressed trie in list form.
- List tries normally only are used for construction when the number of
- possible chars (trie->uniquecharcount) is very high.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_list(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_LIST;
-
- /* print out the table precompression. */
- PerlIO_printf( Perl_debug_log, "%*sState :Word | Transition Data\n%*s%s",
- (int)depth * 2 + 2,"", (int)depth * 2 + 2,"",
- "------:-----+-----------------\n" );
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U16 charid;
-
- PerlIO_printf( Perl_debug_log, "%*s %4"UVXf" :",
- (int)depth * 2 + 2,"", (UV)state );
- if ( ! trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, "%5s| ","");
- } else {
- PerlIO_printf( Perl_debug_log, "W%4x| ",
- trie->states[ state ].wordnum
- );
- }
- for( charid = 1 ; charid <= TRIE_LIST_USED( state ) ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, TRIE_LIST_ITEM(state,charid).forid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s:%3X=%4"UVXf" | ",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- ) ,
- TRIE_LIST_ITEM(state,charid).forid,
- (UV)TRIE_LIST_ITEM(state,charid).newstate
- );
- if (!(charid % 10))
- PerlIO_printf(Perl_debug_log, "\n%*s| ",
- (int)((depth * 2) + 14), "");
- }
- }
- PerlIO_printf( Perl_debug_log, "\n");
- }
-}
-
-/*
- Dumps a fully constructed but uncompressed trie in table form.
- This is the normal DFA style state transition table, with a few
- twists to facilitate compression later.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_table(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- U16 charid;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_TABLE;
-
- /*
- print out the table precompression so that we can do a visual check
- that they are identical.
- */
-
- PerlIO_printf( Perl_debug_log, "%*sChar : ",(int)depth * 2 + 2,"" );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, charid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "\n%*sState+-",(int)depth * 2 + 2,"" );
-
- for( charid=0 ; charid < trie->uniquecharcount ; charid++ ) {
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth,"--------");
- }
-
- PerlIO_printf( Perl_debug_log, "\n" );
-
- for( state=1 ; state < next_alloc ; state += trie->uniquecharcount ) {
-
- PerlIO_printf( Perl_debug_log, "%*s%4"UVXf" : ",
- (int)depth * 2 + 2,"",
- (UV)TRIE_NODENUM( state ) );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- UV v=(UV)SAFE_TRIE_NODENUM( trie->trans[ state + charid ].next );
- if (v)
- PerlIO_printf( Perl_debug_log, "%*"UVXf, colwidth, v );
- else
- PerlIO_printf( Perl_debug_log, "%*s", colwidth, "." );
- }
- if ( ! trie->states[ TRIE_NODENUM( state ) ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf")\n", (UV)trie->trans[ state ].check );
- } else {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf") W%4X\n", (UV)trie->trans[ state ].check,
- trie->states[ TRIE_NODENUM( state ) ].wordnum );
- }
- }
-}
-
-#endif
-
-/* make_trie(startbranch,first,last,tail,word_count,flags,depth)
- startbranch: the first branch in the whole branch sequence
- first : start branch of sequence of branch-exact nodes.
- May be the same as startbranch
- last : Thing following the last branch.
- May be the same as tail.
- tail : item following the branch sequence
- count : words in the sequence
- flags : currently the OP() type we will be building one of /EXACT(|F|Fl)/
- depth : indent depth
-
-Inplace optimizes a sequence of 2 or more Branch-Exact nodes into a TRIE node.
-
-A trie is an N'ary tree where the branches are determined by digital
-decomposition of the key. IE, at the root node you look up the 1st character and
-follow that branch repeat until you find the end of the branches. Nodes can be
-marked as "accepting" meaning they represent a complete word. Eg:
-
- /he|she|his|hers/
-
-would convert into the following structure. Numbers represent states, letters
-following numbers represent valid transitions on the letter from that state, if
-the number is in square brackets it represents an accepting state, otherwise it
-will be in parenthesis.
-
- +-h->+-e->[3]-+-r->(8)-+-s->[9]
- | |
- | (2)
- | |
- (1) +-i->(6)-+-s->[7]
- |
- +-s->(3)-+-h->(4)-+-e->[5]
-
- Accept Word Mapping: 3=>1 (he),5=>2 (she), 7=>3 (his), 9=>4 (hers)
-
-This shows that when matching against the string 'hers' we will begin at state 1
-read 'h' and move to state 2, read 'e' and move to state 3 which is accepting,
-then read 'r' and go to state 8 followed by 's' which takes us to state 9 which
-is also accepting. Thus we know that we can match both 'he' and 'hers' with a
-single traverse. We store a mapping from accepting to state to which word was
-matched, and then when we have multiple possibilities we try to complete the
-rest of the regex in the order in which they occured in the alternation.
-
-The only prior NFA like behaviour that would be changed by the TRIE support is
-the silent ignoring of duplicate alternations which are of the form:
-
- / (DUPE|DUPE) X? (?{ ... }) Y /x
-
-Thus EVAL blocks follwing a trie may be called a different number of times with
-and without the optimisation. With the optimisations dupes will be silently
-ignored. This inconsistant behaviour of EVAL type nodes is well established as
-the following demonstrates:
-
- 'words'=~/(word|word|word)(?{ print $1 })[xyz]/
-
-which prints out 'word' three times, but
-
- 'words'=~/(word|word|word)(?{ print $1 })S/
-
-which doesnt print it out at all. This is due to other optimisations kicking in.
-
-Example of what happens on a structural level:
-
-The regexp /(ac|ad|ab)+/ will produce the folowing debug output:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: BRANCH(8)
- 6: EXACT <ac>(16)
- 8: BRANCH(11)
- 9: EXACT <ad>(16)
- 11: BRANCH(14)
- 12: EXACT <ab>(16)
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-This would be optimizable with startbranch=5, first=5, last=16, tail=16
-and should turn into:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: TRIE(16)
- [Words:3 Chars Stored:6 Unique Chars:4 States:5 NCP:1]
- <ac>
- <ad>
- <ab>
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-Cases where tail != last would be like /(?foo|bar)baz/:
-
- 1: BRANCH(4)
- 2: EXACT <foo>(8)
- 4: BRANCH(7)
- 5: EXACT <bar>(8)
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
-which would be optimizable with startbranch=1, first=1, last=7, tail=8
-and would end up looking like:
-
- 1: TRIE(8)
- [Words:2 Chars Stored:6 Unique Chars:5 States:7 NCP:1]
- <foo>
- <bar>
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
- d = uvuni_to_utf8_flags(d, uv, 0);
-
-is the recommended Unicode-aware way of saying
-
- *(d++) = uv;
-*/
-
-#define TRIE_STORE_REVCHAR \
- STMT_START { \
- if (UTF) { \
- SV *zlopp = newSV(2); \
- unsigned char *flrbbbbb = (unsigned char *) SvPVX(zlopp); \
- unsigned const char *const kapow = uvuni_to_utf8(flrbbbbb, uvc & 0xFF); \
- SvCUR_set(zlopp, kapow - flrbbbbb); \
- SvPOK_on(zlopp); \
- SvUTF8_on(zlopp); \
- av_push(revcharmap, zlopp); \
- } else { \
- char ooooff = (char)uvc; \
- av_push(revcharmap, newSVpvn(&ooooff, 1)); \
- } \
- } STMT_END
-
-#define TRIE_READ_CHAR STMT_START { \
- wordlen++; \
- if ( UTF ) { \
- if ( folder ) { \
- if ( foldlen > 0 ) { \
- uvc = utf8n_to_uvuni( scan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- scan += len; \
- len = 0; \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- scan = foldbuf + UNISKIP( uvc ); \
- } \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- } \
- } else { \
- uvc = (U32)*uc; \
- len = 1; \
- } \
-} STMT_END
-
-
-
-#define TRIE_LIST_PUSH(state,fid,ns) STMT_START { \
- if ( TRIE_LIST_CUR( state ) >=TRIE_LIST_LEN( state ) ) { \
- U32 ging = TRIE_LIST_LEN( state ) *= 2; \
- Renew( trie->states[ state ].trans.list, ging, reg_trie_trans_le ); \
- } \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).forid = fid; \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).newstate = ns; \
- TRIE_LIST_CUR( state )++; \
-} STMT_END
-
-#define TRIE_LIST_NEW(state) STMT_START { \
- Newxz( trie->states[ state ].trans.list, \
- 4, reg_trie_trans_le ); \
- TRIE_LIST_CUR( state ) = 1; \
- TRIE_LIST_LEN( state ) = 4; \
-} STMT_END
-
-#define TRIE_HANDLE_WORD(state) STMT_START { \
- U16 dupe= trie->states[ state ].wordnum; \
- regnode * const noper_next = regnext( noper ); \
- \
- if (trie->wordlen) \
- trie->wordlen[ curword ] = wordlen; \
- DEBUG_r({ \
- /* store the word for dumping */ \
- SV* tmp; \
- if (OP(noper) != NOTHING) \
- tmp = newSVpvn_utf8(STRING(noper), STR_LEN(noper), UTF); \
- else \
- tmp = newSVpvn_utf8( "", 0, UTF ); \
- av_push( trie_words, tmp ); \
- }); \
- \
- curword++; \
- \
- if ( noper_next < tail ) { \
- if (!trie->jump) \
- trie->jump = (U16 *) PerlMemShared_calloc( word_count + 1, sizeof(U16) ); \
- trie->jump[curword] = (U16)(noper_next - convert); \
- if (!jumper) \
- jumper = noper_next; \
- if (!nextbranch) \
- nextbranch= regnext(cur); \
- } \
- \
- if ( dupe ) { \
- /* So it's a dupe. This means we need to maintain a */\
- /* linked-list from the first to the next. */\
- /* we only allocate the nextword buffer when there */\
- /* a dupe, so first time we have to do the allocation */\
- if (!trie->nextword) \
- trie->nextword = (U16 *) \
- PerlMemShared_calloc( word_count + 1, sizeof(U16)); \
- while ( trie->nextword[dupe] ) \
- dupe= trie->nextword[dupe]; \
- trie->nextword[dupe]= curword; \
- } else { \
- /* we haven't inserted this word yet. */ \
- trie->states[ state ].wordnum = curword; \
- } \
-} STMT_END
-
-
-#define TRIE_TRANS_STATE(state,base,ucharcount,charid,special) \
- ( ( base + charid >= ucharcount \
- && base + charid < ubound \
- && state == trie->trans[ base - ucharcount + charid ].check \
- && trie->trans[ base - ucharcount + charid ].next ) \
- ? trie->trans[ base - ucharcount + charid ].next \
- : ( state==1 ? special : 0 ) \
- )
-
-#define MADE_TRIE 1
-#define MADE_JUMP_TRIE 2
-#define MADE_EXACT_TRIE 4
-
-STATIC I32
-S_make_trie(pTHX_ RExC_state_t *pRExC_state, regnode *startbranch, regnode *first, regnode *last, regnode *tail, U32 word_count, U32 flags, U32 depth)
-{
- dVAR;
- /* first pass, loop through and scan words */
- reg_trie_data *trie;
- HV *widecharmap = NULL;
- AV *revcharmap = newAV();
- regnode *cur;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- STRLEN len = 0;
- UV uvc = 0;
- U16 curword = 0;
- U32 next_alloc = 0;
- regnode *jumper = NULL;
- regnode *nextbranch = NULL;
- regnode *convert = NULL;
- /* we just use folder as a flag in utf8 */
- const U8 * const folder = ( flags == EXACTF
- ? PL_fold
- : ( flags == EXACTFL
- ? PL_fold_locale
- : NULL
- )
- );
-
-#ifdef DEBUGGING
- const U32 data_slot = add_data( pRExC_state, 4, "tuuu" );
- AV *trie_words = NULL;
- /* along with revcharmap, this only used during construction but both are
- * useful during debugging so we store them in the struct when debugging.
- */
-#else
- const U32 data_slot = add_data( pRExC_state, 2, "tu" );
- STRLEN trie_charcount=0;
-#endif
- SV *re_trie_maxbuff;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- trie = (reg_trie_data *) PerlMemShared_calloc( 1, sizeof(reg_trie_data) );
- trie->refcount = 1;
- trie->startstate = 1;
- trie->wordcount = word_count;
- RExC_rxi->data->data[ data_slot ] = (void*)trie;
- trie->charmap = (U16 *) PerlMemShared_calloc( 256, sizeof(U16) );
- if (!(UTF && folder))
- trie->bitmap = (char *) PerlMemShared_calloc( ANYOF_BITMAP_SIZE, 1 );
- DEBUG_r({
- trie_words = newAV();
- });
-
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff)) {
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- DEBUG_OPTIMISE_r({
- PerlIO_printf( Perl_debug_log,
- "%*smake_trie start==%d, first==%d, last==%d, tail==%d depth=%d\n",
- (int)depth * 2 + 2, "",
- REG_NODE_NUM(startbranch),REG_NODE_NUM(first),
- REG_NODE_NUM(last), REG_NODE_NUM(tail),
- (int)depth);
- });
-
- /* Find the node we are going to overwrite */
- if ( first == startbranch && OP( last ) != BRANCH ) {
- /* whole branch chain */
- convert = first;
- } else {
- /* branch sub-chain */
- convert = NEXTOPER( first );
- }
-
- /* -- First loop and Setup --
-
- We first traverse the branches and scan each word to determine if it
- contains widechars, and how many unique chars there are, this is
- important as we have to build a table with at least as many columns as we
- have unique chars.
-
- We use an array of integers to represent the character codes 0..255
- (trie->charmap) and we use a an HV* to store Unicode characters. We use the
- native representation of the character value as the key and IV's for the
- coded index.
-
- *TODO* If we keep track of how many times each character is used we can
- remap the columns so that the table compression later on is more
- efficient in terms of memory by ensuring most common value is in the
- middle and the least common are on the outside. IMO this would be better
- than a most to least common mapping as theres a decent chance the most
- common letter will share a node with the least common, meaning the node
- will not be compressable. With a middle is most common approach the worst
- case is when we have the least common nodes twice.
-
- */
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- STRLEN foldlen = 0;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- const U8 *scan = (U8*)NULL;
- U32 wordlen = 0; /* required init */
- STRLEN chars = 0;
- bool set_bit = trie->bitmap ? 1 : 0; /*store the first char in the bitmap?*/
-
- if (OP(noper) == NOTHING) {
- trie->minlen= 0;
- continue;
- }
- if ( set_bit ) /* bitmap only alloced when !(UTF&&Folding) */
- TRIE_BITMAP_SET(trie,*uc); /* store the raw first byte
- regardless of encoding */
-
- for ( ; uc < e ; uc += len ) {
- TRIE_CHARCOUNT(trie)++;
- TRIE_READ_CHAR;
- chars++;
- if ( uvc < 256 ) {
- if ( !trie->charmap[ uvc ] ) {
- trie->charmap[ uvc ]=( ++trie->uniquecharcount );
- if ( folder )
- trie->charmap[ folder[ uvc ] ] = trie->charmap[ uvc ];
- TRIE_STORE_REVCHAR;
- }
- if ( set_bit ) {
- /* store the codepoint in the bitmap, and if its ascii
- also store its folded equivelent. */
- TRIE_BITMAP_SET(trie,uvc);
-
- /* store the folded codepoint */
- if ( folder ) TRIE_BITMAP_SET(trie,folder[ uvc ]);
-
- if ( !UTF ) {
- /* store first byte of utf8 representation of
- codepoints in the 127 < uvc < 256 range */
- if (127 < uvc && uvc < 192) {
- TRIE_BITMAP_SET(trie,194);
- } else if (191 < uvc ) {
- TRIE_BITMAP_SET(trie,195);
- /* && uvc < 256 -- we know uvc is < 256 already */
- }
- }
- set_bit = 0; /* We've done our bit :-) */
- }
- } else {
- SV** svpp;
- if ( !widecharmap )
- widecharmap = newHV();
-
- svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 1 );
-
- if ( !svpp )
- Perl_croak( aTHX_ "error creating/fetching widecharmap entry for 0x%"UVXf, uvc );
-
- if ( !SvTRUE( *svpp ) ) {
- sv_setiv( *svpp, ++trie->uniquecharcount );
- TRIE_STORE_REVCHAR;
- }
- }
- }
- if( cur == first ) {
- trie->minlen=chars;
- trie->maxlen=chars;
- } else if (chars < trie->minlen) {
- trie->minlen=chars;
- } else if (chars > trie->maxlen) {
- trie->maxlen=chars;
- }
-
- } /* end first pass */
- DEBUG_TRIE_COMPILE_r(
- PerlIO_printf( Perl_debug_log, "%*sTRIE(%s): W:%d C:%d Uq:%d Min:%d Max:%d\n",
- (int)depth * 2 + 2,"",
- ( widecharmap ? "UTF8" : "NATIVE" ), (int)word_count,
- (int)TRIE_CHARCOUNT(trie), trie->uniquecharcount,
- (int)trie->minlen, (int)trie->maxlen )
- );
- trie->wordlen = (U32 *) PerlMemShared_calloc( word_count, sizeof(U32) );
-
- /*
- We now know what we are dealing with in terms of unique chars and
- string sizes so we can calculate how much memory a naive
- representation using a flat table will take. If it's over a reasonable
- limit (as specified by ${^RE_TRIE_MAXBUF}) we use a more memory
- conservative but potentially much slower representation using an array
- of lists.
-
- At the end we convert both representations into the same compressed
- form that will be used in regexec.c for matching with. The latter
- is a form that cannot be used to construct with but has memory
- properties similar to the list form and access properties similar
- to the table form making it both suitable for fast searches and
- small enough that its feasable to store for the duration of a program.
-
- See the comment in the code where the compressed table is produced
- inplace from the flat tabe representation for an explanation of how
- the compression works.
-
- */
-
-
- if ( (IV)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1) > SvIV(re_trie_maxbuff) ) {
- /*
- Second Pass -- Array Of Lists Representation
-
- Each state will be represented by a list of charid:state records
- (reg_trie_trans_le) the first such element holds the CUR and LEN
- points of the allocated array. (See defines above).
-
- We build the initial structure using the lists, and then convert
- it into the compressed table form which allows faster lookups
- (but cant be modified once converted).
- */
-
- STRLEN transcount = 1;
-
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using list compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- TRIE_LIST_NEW(1);
- next_alloc = 2;
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- U32 state = 1; /* required init */
- U16 charid = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if (OP(noper) != NOTHING) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV** const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- if ( !svpp ) {
- charid = 0;
- } else {
- charid=(U16)SvIV( *svpp );
- }
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- if ( charid ) {
-
- U16 check;
- U32 newstate = 0;
-
- charid--;
- if ( !trie->states[ state ].trans.list ) {
- TRIE_LIST_NEW( state );
- }
- for ( check = 1; check <= TRIE_LIST_USED( state ); check++ ) {
- if ( TRIE_LIST_ITEM( state, check ).forid == charid ) {
- newstate = TRIE_LIST_ITEM( state, check ).newstate;
- break;
- }
- }
- if ( ! newstate ) {
- newstate = next_alloc++;
- TRIE_LIST_PUSH( state, charid, newstate );
- transcount++;
- }
- state = newstate;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- }
- }
- TRIE_HANDLE_WORD(state);
-
- } /* end second pass */
-
- /* next alloc is the NEXT state to be allocated */
- trie->statecount = next_alloc;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states,
- next_alloc
- * sizeof(reg_trie_state) );
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_list(trie, widecharmap,
- revcharmap, next_alloc,
- depth+1)
- );
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( transcount, sizeof(reg_trie_trans) );
- {
- U32 state;
- U32 tp = 0;
- U32 zp = 0;
-
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U32 base=0;
-
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, "tp: %d zp: %d ",tp,zp)
- );
- */
-
- if (trie->states[state].trans.list) {
- U16 minid=TRIE_LIST_ITEM( state, 1).forid;
- U16 maxid=minid;
- U16 idx;
-
- for( idx = 2 ; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U16 forid = TRIE_LIST_ITEM( state, idx).forid;
- if ( forid < minid ) {
- minid=forid;
- } else if ( forid > maxid ) {
- maxid=forid;
- }
- }
- if ( transcount < tp + maxid - minid + 1) {
- transcount *= 2;
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans,
- transcount
- * sizeof(reg_trie_trans) );
- Zero( trie->trans + (transcount / 2), transcount / 2 , reg_trie_trans );
- }
- base = trie->uniquecharcount + tp - minid;
- if ( maxid == minid ) {
- U32 set = 0;
- for ( ; zp < tp ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- base = trie->uniquecharcount + zp - minid;
- trie->trans[ zp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ zp ].check = state;
- set = 1;
- break;
- }
- }
- if ( !set ) {
- trie->trans[ tp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ tp ].check = state;
- tp++;
- zp = tp;
- }
- } else {
- for ( idx=1; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U32 tid = base - trie->uniquecharcount + TRIE_LIST_ITEM( state, idx ).forid;
- trie->trans[ tid ].next = TRIE_LIST_ITEM( state, idx ).newstate;
- trie->trans[ tid ].check = state;
- }
- tp += ( maxid - minid + 1 );
- }
- Safefree(trie->states[ state ].trans.list);
- }
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, " base: %d\n",base);
- );
- */
- trie->states[ state ].trans.base=base;
- }
- trie->lasttrans = tp + 1;
- }
- } else {
- /*
- Second Pass -- Flat Table Representation.
-
- we dont use the 0 slot of either trans[] or states[] so we add 1 to each.
- We know that we will need Charcount+1 trans at most to store the data
- (one row per char at worst case) So we preallocate both structures
- assuming worst case.
-
- We then construct the trie using only the .next slots of the entry
- structs.
-
- We use the .check field of the first entry of the node temporarily to
- make compression both faster and easier by keeping track of how many non
- zero fields are in the node.
-
- Since trans are numbered from 1 any 0 pointer in the table is a FAIL
- transition.
-
- There are two terms at use here: state as a TRIE_NODEIDX() which is a
- number representing the first entry of the node, and state as a
- TRIE_NODENUM() which is the trans number. state 1 is TRIE_NODEIDX(1) and
- TRIE_NODENUM(1), state 2 is TRIE_NODEIDX(2) and TRIE_NODENUM(3) if there
- are 2 entrys per node. eg:
-
- A B A B
- 1. 2 4 1. 3 7
- 2. 0 3 3. 0 5
- 3. 0 0 5. 0 0
- 4. 0 0 7. 0 0
-
- The table is internally in the right hand, idx form. However as we also
- have to deal with the states array which is indexed by nodenum we have to
- use TRIE_NODENUM() to convert.
-
- */
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using table compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( ( TRIE_CHARCOUNT(trie) + 1 )
- * trie->uniquecharcount + 1,
- sizeof(reg_trie_trans) );
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- next_alloc = trie->uniquecharcount + 1;
-
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
-
- U32 state = 1; /* required init */
-
- U16 charid = 0; /* sanity init */
- U32 accept_state = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
-
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if ( OP(noper) != NOTHING ) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV* const * const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- charid = svpp ? (U16)SvIV(*svpp) : 0;
- }
- if ( charid ) {
- charid--;
- if ( !trie->trans[ state + charid ].next ) {
- trie->trans[ state + charid ].next = next_alloc;
- trie->trans[ state ].check++;
- next_alloc += trie->uniquecharcount;
- }
- state = trie->trans[ state + charid ].next;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- }
- }
- accept_state = TRIE_NODENUM( state );
- TRIE_HANDLE_WORD(accept_state);
-
- } /* end second pass */
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_table(trie, widecharmap,
- revcharmap,
- next_alloc, depth+1));
-
- {
- /*
- * Inplace compress the table.*
-
- For sparse data sets the table constructed by the trie algorithm will
- be mostly 0/FAIL transitions or to put it another way mostly empty.
- (Note that leaf nodes will not contain any transitions.)
-
- This algorithm compresses the tables by eliminating most such
- transitions, at the cost of a modest bit of extra work during lookup:
-
- - Each states[] entry contains a .base field which indicates the
- index in the state[] array wheres its transition data is stored.
-
- - If .base is 0 there are no valid transitions from that node.
-
- - If .base is nonzero then charid is added to it to find an entry in
- the trans array.
-
- -If trans[states[state].base+charid].check!=state then the
- transition is taken to be a 0/Fail transition. Thus if there are fail
- transitions at the front of the node then the .base offset will point
- somewhere inside the previous nodes data (or maybe even into a node
- even earlier), but the .check field determines if the transition is
- valid.
-
- XXX - wrong maybe?
- The following process inplace converts the table to the compressed
- table: We first do not compress the root node 1,and mark its all its
- .check pointers as 1 and set its .base pointer as 1 as well. This
- allows to do a DFA construction from the compressed table later, and
- ensures that any .base pointers we calculate later are greater than
- 0.
-
- - We set 'pos' to indicate the first entry of the second node.
-
- - We then iterate over the columns of the node, finding the first and
- last used entry at l and m. We then copy l..m into pos..(pos+m-l),
- and set the .check pointers accordingly, and advance pos
- appropriately and repreat for the next node. Note that when we copy
- the next pointers we have to convert them from the original
- NODEIDX form to NODENUM form as the former is not valid post
- compression.
-
- - If a node has no transitions used we mark its base as 0 and do not
- advance the pos pointer.
-
- - If a node only has one transition we use a second pointer into the
- structure to fill in allocated fail transitions from other states.
- This pointer is independent of the main pointer and scans forward
- looking for null transitions that are allocated to a state. When it
- finds one it writes the single transition into the "hole". If the
- pointer doesnt find one the single transition is appended as normal.
-
- - Once compressed we can Renew/realloc the structures to release the
- excess space.
-
- See "Table-Compression Methods" in sec 3.9 of the Red Dragon,
- specifically Fig 3.47 and the associated pseudocode.
-
- demq
- */
- const U32 laststate = TRIE_NODENUM( next_alloc );
- U32 state, charid;
- U32 pos = 0, zp=0;
- trie->statecount = laststate;
-
- for ( state = 1 ; state < laststate ; state++ ) {
- U8 flag = 0;
- const U32 stateidx = TRIE_NODEIDX( state );
- const U32 o_used = trie->trans[ stateidx ].check;
- U32 used = trie->trans[ stateidx ].check;
- trie->trans[ stateidx ].check = 0;
-
- for ( charid = 0 ; used && charid < trie->uniquecharcount ; charid++ ) {
- if ( flag || trie->trans[ stateidx + charid ].next ) {
- if ( trie->trans[ stateidx + charid ].next ) {
- if (o_used == 1) {
- for ( ; zp < pos ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- break;
- }
- }
- trie->states[ state ].trans.base = zp + trie->uniquecharcount - charid ;
- trie->trans[ zp ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ zp ].check = state;
- if ( ++zp > pos ) pos = zp;
- break;
- }
- used--;
- }
- if ( !flag ) {
- flag = 1;
- trie->states[ state ].trans.base = pos + trie->uniquecharcount - charid ;
- }
- trie->trans[ pos ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ pos ].check = state;
- pos++;
- }
- }
- }
- trie->lasttrans = pos + 1;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states, laststate
- * sizeof(reg_trie_state) );
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log,
- "%*sAlloc: %d Orig: %"IVdf" elements, Final:%"IVdf". Savings of %%%5.2f\n",
- (int)depth * 2 + 2,"",
- (int)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1 ),
- (IV)next_alloc,
- (IV)pos,
- ( ( next_alloc - pos ) * 100 ) / (double)next_alloc );
- );
-
- } /* end table compress */
- }
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf(Perl_debug_log, "%*sStatecount:%"UVxf" Lasttrans:%"UVxf"\n",
- (int)depth * 2 + 2, "",
- (UV)trie->statecount,
- (UV)trie->lasttrans)
- );
- /* resize the trans array to remove unused space */
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans, trie->lasttrans
- * sizeof(reg_trie_trans) );
-
- /* and now dump out the compressed format */
- DEBUG_TRIE_COMPILE_r(dump_trie(trie, widecharmap, revcharmap, depth+1));
-
- { /* Modify the program and insert the new TRIE node*/
- U8 nodetype =(U8)(flags & 0xFF);
- char *str=NULL;
-
-#ifdef DEBUGGING
- regnode *optimize = NULL;
-#ifdef RE_TRACK_PATTERN_OFFSETS
-
- U32 mjd_offset = 0;
- U32 mjd_nodelen = 0;
-#endif /* RE_TRACK_PATTERN_OFFSETS */
-#endif /* DEBUGGING */
- /*
- This means we convert either the first branch or the first Exact,
- depending on whether the thing following (in 'last') is a branch
- or not and whther first is the startbranch (ie is it a sub part of
- the alternation or is it the whole thing.)
- Assuming its a sub part we conver the EXACT otherwise we convert
- the whole branch sequence, including the first.
- */
- /* Find the node we are going to overwrite */
- if ( first != startbranch || OP( last ) == BRANCH ) {
- /* branch sub-chain */
- NEXT_OFF( first ) = (U16)(last - first);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_r({
- mjd_offset= Node_Offset((convert));
- mjd_nodelen= Node_Length((convert));
- });
-#endif
- /* whole branch chain */
- }
-#ifdef RE_TRACK_PATTERN_OFFSETS
- else {
- DEBUG_r({
- const regnode *nop = NEXTOPER( convert );
- mjd_offset= Node_Offset((nop));
- mjd_nodelen= Node_Length((nop));
- });
- }
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%*sMJD offset:%"UVuf" MJD length:%"UVuf"\n",
- (int)depth * 2 + 2, "",
- (UV)mjd_offset, (UV)mjd_nodelen)
- );
-#endif
- /* But first we check to see if there is a common prefix we can
- split out as an EXACT and put in front of the TRIE node. */
- trie->startstate= 1;
- if ( trie->bitmap && !widecharmap && !trie->jump ) {
- U32 state;
- for ( state = 1 ; state < trie->statecount-1 ; state++ ) {
- U32 ofs = 0;
- I32 idx = -1;
- U32 count = 0;
- const U32 base = trie->states[ state ].trans.base;
-
- if ( trie->states[state].wordnum )
- count = 1;
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- if ( ++count > 1 ) {
- SV **tmp = av_fetch( revcharmap, ofs, 0);
- const U8 *ch = (U8*)SvPV_nolen_const( *tmp );
- if ( state == 1 ) break;
- if ( count == 2 ) {
- Zero(trie->bitmap, ANYOF_BITMAP_SIZE, char);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*sNew Start State=%"UVuf" Class: [",
- (int)depth * 2 + 2, "",
- (UV)state));
- if (idx >= 0) {
- SV ** const tmp = av_fetch( revcharmap, idx, 0);
- const U8 * const ch = (U8*)SvPV_nolen_const( *tmp );
-
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie, folder[ *ch ]);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%s", (char*)ch)
- );
- }
- }
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie,folder[ *ch ]);
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"%s", ch));
- }
- idx = ofs;
- }
- }
- if ( count == 1 ) {
- SV **tmp = av_fetch( revcharmap, idx, 0);
- STRLEN len;
- char *ch = SvPV( *tmp, len );
- DEBUG_OPTIMISE_r({
- SV *sv=sv_newmortal();
- PerlIO_printf( Perl_debug_log,
- "%*sPrefix State: %"UVuf" Idx:%"UVuf" Char='%s'\n",
- (int)depth * 2 + 2, "",
- (UV)state, (UV)idx,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 6,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- });
- if ( state==1 ) {
- OP( convert ) = nodetype;
- str=STRING(convert);
- STR_LEN(convert)=0;
- }
- STR_LEN(convert) += len;
- while (len--)
- *str++ = *ch++;
- } else {
-#ifdef DEBUGGING
- if (state>1)
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"]\n"));
-#endif
- break;
- }
- }
- if (str) {
- regnode *n = convert+NODE_SZ_STR(convert);
- NEXT_OFF(convert) = NODE_SZ_STR(convert);
- trie->startstate = state;
- trie->minlen -= (state - 1);
- trie->maxlen -= (state - 1);
-#ifdef DEBUGGING
- /* At least the UNICOS C compiler choked on this
- * being argument to DEBUG_r(), so let's just have
- * it right here. */
- if (
-#ifdef PERL_EXT_RE_BUILD
- 1
-#else
- DEBUG_r_TEST
-#endif
- ) {
- regnode *fix = convert;
- U32 word = trie->wordcount;
- mjd_nodelen++;
- Set_Node_Offset_Length(convert, mjd_offset, state - 1);
- while( ++fix < n ) {
- Set_Node_Offset_Length(fix, 0, 0);
- }
- while (word--) {
- SV ** const tmp = av_fetch( trie_words, word, 0 );
- if (tmp) {
- if ( STR_LEN(convert) <= SvCUR(*tmp) )
- sv_chop(*tmp, SvPV_nolen(*tmp) + STR_LEN(convert));
- else
- sv_chop(*tmp, SvPV_nolen(*tmp) + SvCUR(*tmp));
- }
- }
- }
-#endif
- if (trie->maxlen) {
- convert = n;
- } else {
- NEXT_OFF(convert) = (U16)(tail - convert);
- DEBUG_r(optimize= n);
- }
- }
- }
- if (!jumper)
- jumper = last;
- if ( trie->maxlen ) {
- NEXT_OFF( convert ) = (U16)(tail - convert);
- ARG_SET( convert, data_slot );
- /* Store the offset to the first unabsorbed branch in
- jump[0], which is otherwise unused by the jump logic.
- We use this when dumping a trie and during optimisation. */
- if (trie->jump)
- trie->jump[0] = (U16)(nextbranch - convert);
-
- /* XXXX */
- if ( !trie->states[trie->startstate].wordnum && trie->bitmap &&
- ( (char *)jumper - (char *)convert) >= (int)sizeof(struct regnode_charclass) )
- {
- OP( convert ) = TRIEC;
- Copy(trie->bitmap, ((struct regnode_charclass *)convert)->bitmap, ANYOF_BITMAP_SIZE, char);
- PerlMemShared_free(trie->bitmap);
- trie->bitmap= NULL;
- } else
- OP( convert ) = TRIE;
-
- /* store the type in the flags */
- convert->flags = nodetype;
- DEBUG_r({
- optimize = convert
- + NODE_STEP_REGNODE
- + regarglen[ OP( convert ) ];
- });
- /* XXX We really should free up the resource in trie now,
- as we won't use them - (which resources?) dmq */
- }
- /* needed for dumping*/
- DEBUG_r(if (optimize) {
- regnode *opt = convert;
-
- while ( ++opt < optimize) {
- Set_Node_Offset_Length(opt,0,0);
- }
- /*
- Try to clean up some of the debris left after the
- optimisation.
- */
- while( optimize < jumper ) {
- mjd_nodelen += Node_Length((optimize));
- OP( optimize ) = OPTIMIZED;
- Set_Node_Offset_Length(optimize,0,0);
- optimize++;
- }
- Set_Node_Offset_Length(convert,mjd_offset,mjd_nodelen);
- });
- } /* end node insert */
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, convert);
- RExC_rxi->data->data[ data_slot + 1 ] = (void*)widecharmap;
-#ifdef DEBUGGING
- RExC_rxi->data->data[ data_slot + TRIE_WORDS_OFFSET ] = (void*)trie_words;
- RExC_rxi->data->data[ data_slot + 3 ] = (void*)revcharmap;
-#else
- SvREFCNT_dec(revcharmap);
-#endif
- return trie->jump
- ? MADE_JUMP_TRIE
- : trie->startstate>1
- ? MADE_EXACT_TRIE
- : MADE_TRIE;
-}
-
-STATIC void
-S_make_trie_failtable(pTHX_ RExC_state_t *pRExC_state, regnode *source, regnode *stclass, U32 depth)
-{
-/* The Trie is constructed and compressed now so we can build a fail array now if its needed
-
- This is basically the Aho-Corasick algorithm. Its from exercise 3.31 and 3.32 in the
- "Red Dragon" -- Compilers, principles, techniques, and tools. Aho, Sethi, Ullman 1985/88
- ISBN 0-201-10088-6
-
- We find the fail state for each state in the trie, this state is the longest proper
- suffix of the current states 'word' that is also a proper prefix of another word in our
- trie. State 1 represents the word '' and is the thus the default fail state. This allows
- the DFA not to have to restart after its tried and failed a word at a given point, it
- simply continues as though it had been matching the other word in the first place.
- Consider
- 'abcdgu'=~/abcdefg|cdgu/
- When we get to 'd' we are still matching the first word, we would encounter 'g' which would
- fail, which would bring use to the state representing 'd' in the second word where we would
- try 'g' and succeed, prodceding to match 'cdgu'.
- */
- /* add a fail transition */
- const U32 trie_offset = ARG(source);
- reg_trie_data *trie=(reg_trie_data *)RExC_rxi->data->data[trie_offset];
- U32 *q;
- const U32 ucharcount = trie->uniquecharcount;
- const U32 numstates = trie->statecount;
- const U32 ubound = trie->lasttrans + ucharcount;
- U32 q_read = 0;
- U32 q_write = 0;
- U32 charid;
- U32 base = trie->states[ 1 ].trans.base;
- U32 *fail;
- reg_ac_data *aho;
- const U32 data_slot = add_data( pRExC_state, 1, "T" );
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE_FAILTABLE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
-
- ARG_SET( stclass, data_slot );
- aho = (reg_ac_data *) PerlMemShared_calloc( 1, sizeof(reg_ac_data) );
- RExC_rxi->data->data[ data_slot ] = (void*)aho;
- aho->trie=trie_offset;
- aho->states=(reg_trie_state *)PerlMemShared_malloc( numstates * sizeof(reg_trie_state) );
- Copy( trie->states, aho->states, numstates, reg_trie_state );
- Newxz( q, numstates, U32);
- aho->fail = (U32 *) PerlMemShared_calloc( numstates, sizeof(U32) );
- aho->refcount = 1;
- fail = aho->fail;
- /* initialize fail[0..1] to be 1 so that we always have
- a valid final fail state */
- fail[ 0 ] = fail[ 1 ] = 1;
-
- for ( charid = 0; charid < ucharcount ; charid++ ) {
- const U32 newstate = TRIE_TRANS_STATE( 1, base, ucharcount, charid, 0 );
- if ( newstate ) {
- q[ q_write ] = newstate;
- /* set to point at the root */
- fail[ q[ q_write++ ] ]=1;
- }
- }
- while ( q_read < q_write) {
- const U32 cur = q[ q_read++ % numstates ];
- base = trie->states[ cur ].trans.base;
-
- for ( charid = 0 ; charid < ucharcount ; charid++ ) {
- const U32 ch_state = TRIE_TRANS_STATE( cur, base, ucharcount, charid, 1 );
- if (ch_state) {
- U32 fail_state = cur;
- U32 fail_base;
- do {
- fail_state = fail[ fail_state ];
- fail_base = aho->states[ fail_state ].trans.base;
- } while ( !TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ) );
-
- fail_state = TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 );
- fail[ ch_state ] = fail_state;
- if ( !aho->states[ ch_state ].wordnum && aho->states[ fail_state ].wordnum )
- {
- aho->states[ ch_state ].wordnum = aho->states[ fail_state ].wordnum;
- }
- q[ q_write++ % numstates] = ch_state;
- }
- }
- }
- /* restore fail[0..1] to 0 so that we "fall out" of the AC loop
- when we fail in state 1, this allows us to use the
- charclass scan to find a valid start char. This is based on the principle
- that theres a good chance the string being searched contains lots of stuff
- that cant be a start char.
- */
- fail[ 0 ] = fail[ 1 ] = 0;
- DEBUG_TRIE_COMPILE_r({
- PerlIO_printf(Perl_debug_log,
- "%*sStclass Failtable (%"UVuf" states): 0",
- (int)(depth * 2), "", (UV)numstates
- );
- for( q_read=1; q_read<numstates; q_read++ ) {
- PerlIO_printf(Perl_debug_log, ", %"UVuf, (UV)fail[q_read]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
- Safefree(q);
- /*RExC_seen |= REG_SEEN_TRIEDFA;*/
-}
-
-
-/*
- * There are strange code-generation bugs caused on sparc64 by gcc-2.95.2.
- * These need to be revisited when a newer toolchain becomes available.
- */
-#if defined(__sparc64__) && defined(__GNUC__)
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
-# undef SPARC64_GCC_WORKAROUND
-# define SPARC64_GCC_WORKAROUND 1
-# endif
-#endif
-
-#define DEBUG_PEEP(str,scan,depth) \
- DEBUG_OPTIMISE_r({if (scan){ \
- SV * const mysv=sv_newmortal(); \
- regnode *Next = regnext(scan); \
- regprop(RExC_rx, mysv, scan); \
- PerlIO_printf(Perl_debug_log, "%*s" str ">%3d: %s (%d)\n", \
- (int)depth*2, "", REG_NODE_NUM(scan), SvPV_nolen_const(mysv),\
- Next ? (REG_NODE_NUM(Next)) : 0 ); \
- }});
-
-
-
-
-
-#define JOIN_EXACT(scan,min,flags) \
- if (PL_regkind[OP(scan)] == EXACT) \
- join_exact(pRExC_state,(scan),(min),(flags),NULL,depth+1)
-
-STATIC U32
-S_join_exact(pTHX_ RExC_state_t *pRExC_state, regnode *scan, I32 *min, U32 flags,regnode *val, U32 depth) {
- /* Merge several consecutive EXACTish nodes into one. */
- regnode *n = regnext(scan);
- U32 stringok = 1;
- regnode *next = scan + NODE_SZ_STR(scan);
- U32 merged = 0;
- U32 stopnow = 0;
-#ifdef DEBUGGING
- regnode *stop = scan;
- GET_RE_DEBUG_FLAGS_DECL;
-#else
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_JOIN_EXACT;
-#ifndef EXPERIMENTAL_INPLACESCAN
- PERL_UNUSED_ARG(flags);
- PERL_UNUSED_ARG(val);
-#endif
- DEBUG_PEEP("join",scan,depth);
-
- /* Skip NOTHING, merge EXACT*. */
- while (n &&
- ( PL_regkind[OP(n)] == NOTHING ||
- (stringok && (OP(n) == OP(scan))))
- && NEXT_OFF(n)
- && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) {
-
- if (OP(n) == TAIL || n > next)
- stringok = 0;
- if (PL_regkind[OP(n)] == NOTHING) {
- DEBUG_PEEP("skip:",n,depth);
- NEXT_OFF(scan) += NEXT_OFF(n);
- next = n + NODE_STEP_REGNODE;
-#ifdef DEBUGGING
- if (stringok)
- stop = n;
-#endif
- n = regnext(n);
- }
- else if (stringok) {
- const unsigned int oldl = STR_LEN(scan);
- regnode * const nnext = regnext(n);
-
- DEBUG_PEEP("merg",n,depth);
-
- merged++;
- if (oldl + STR_LEN(n) > U8_MAX)
- break;
- NEXT_OFF(scan) += NEXT_OFF(n);
- STR_LEN(scan) += STR_LEN(n);
- next = n + NODE_SZ_STR(n);
- /* Now we can overwrite *n : */
- Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char);
-#ifdef DEBUGGING
- stop = next - 1;
-#endif
- n = nnext;
- if (stopnow) break;
- }
-
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (flags && !NEXT_OFF(n)) {
- DEBUG_PEEP("atch", val, depth);
- if (reg_off_by_arg[OP(n)]) {
- ARG_SET(n, val - n);
- }
- else {
- NEXT_OFF(n) = val - n;
- }
- stopnow = 1;
- }
-#endif
- }
-
- if (UTF && ( OP(scan) == EXACTF ) && ( STR_LEN(scan) >= 6 ) ) {
- /*
- Two problematic code points in Unicode casefolding of EXACT nodes:
-
- U+0390 - GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS
- U+03B0 - GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS
-
- which casefold to
-
- Unicode UTF-8
-
- U+03B9 U+0308 U+0301 0xCE 0xB9 0xCC 0x88 0xCC 0x81
- U+03C5 U+0308 U+0301 0xCF 0x85 0xCC 0x88 0xCC 0x81
-
- This means that in case-insensitive matching (or "loose matching",
- as Unicode calls it), an EXACTF of length six (the UTF-8 encoded byte
- length of the above casefolded versions) can match a target string
- of length two (the byte length of UTF-8 encoded U+0390 or U+03B0).
- This would rather mess up the minimum length computation.
-
- What we'll do is to look for the tail four bytes, and then peek
- at the preceding two bytes to see whether we need to decrease
- the minimum length by four (six minus two).
-
- Thanks to the design of UTF-8, there cannot be false matches:
- A sequence of valid UTF-8 bytes cannot be a subsequence of
- another valid sequence of UTF-8 bytes.
-
- */
- char * const s0 = STRING(scan), *s, *t;
- char * const s1 = s0 + STR_LEN(scan) - 1;
- char * const s2 = s1 - 4;
-#ifdef EBCDIC /* RD tunifold greek 0390 and 03B0 */
- const char t0[] = "\xaf\x49\xaf\x42";
-#else
- const char t0[] = "\xcc\x88\xcc\x81";
-#endif
- const char * const t1 = t0 + 3;
-
- for (s = s0 + 2;
- s < s2 && (t = ninstr(s, s1, t0, t1));
- s = t + 4) {
-#ifdef EBCDIC
- if (((U8)t[-1] == 0x68 && (U8)t[-2] == 0xB4) ||
- ((U8)t[-1] == 0x46 && (U8)t[-2] == 0xB5))
-#else
- if (((U8)t[-1] == 0xB9 && (U8)t[-2] == 0xCE) ||
- ((U8)t[-1] == 0x85 && (U8)t[-2] == 0xCF))
-#endif
- *min -= 4;
- }
- }
-
-#ifdef DEBUGGING
- /* Allow dumping */
- n = scan + NODE_SZ_STR(scan);
- while (n <= stop) {
- if (PL_regkind[OP(n)] != NOTHING || OP(n) == NOTHING) {
- OP(n) = OPTIMIZED;
- NEXT_OFF(n) = 0;
- }
- n++;
- }
-#endif
- DEBUG_OPTIMISE_r(if (merged){DEBUG_PEEP("finl",scan,depth)});
- return stopnow;
-}
-
-/* REx optimizer. Converts nodes into quickier variants "in place".
- Finds fixed substrings. */
-
-/* Stops at toplevel WHILEM as well as at "last". At end *scanp is set
- to the position after last scanned or to NULL. */
-
-#define INIT_AND_WITHP \
- assert(!and_withp); \
- Newx(and_withp,1,struct regnode_charclass_class); \
- SAVEFREEPV(and_withp)
-
-/* this is a chain of data about sub patterns we are processing that
- need to be handled seperately/specially in study_chunk. Its so
- we can simulate recursion without losing state. */
-struct scan_frame;
-typedef struct scan_frame {
- regnode *last; /* last node to process in this frame */
- regnode *next; /* next node to process when last is reached */
- struct scan_frame *prev; /*previous frame*/
- I32 stop; /* what stopparen do we use */
-} scan_frame;
-
-
-#define SCAN_COMMIT(s, data, m) scan_commit(s, data, m, is_inf)
-
-#define CASE_SYNST_FNC(nAmE) \
-case nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break; \
-case N ## nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break
-
-
-
-STATIC I32
-S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp,
- I32 *minlenp, I32 *deltap,
- regnode *last,
- scan_data_t *data,
- I32 stopparen,
- U8* recursed,
- struct regnode_charclass_class *and_withp,
- U32 flags, U32 depth)
- /* scanp: Start here (read-write). */
- /* deltap: Write maxlen-minlen here. */
- /* last: Stop before this one. */
- /* data: string data about the pattern */
- /* stopparen: treat close N as END */
- /* recursed: which subroutines have we recursed into */
- /* and_withp: Valid if flags & SCF_DO_STCLASS_OR */
-{
- dVAR;
- I32 min = 0, pars = 0, code;
- regnode *scan = *scanp, *next;
- I32 delta = 0;
- int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF);
- int is_inf_internal = 0; /* The studied chunk is infinite */
- I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0;
- scan_data_t data_fake;
- SV *re_trie_maxbuff = NULL;
- regnode *first_non_open = scan;
- I32 stopmin = I32_MAX;
- scan_frame *frame = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_STUDY_CHUNK;
-
-#ifdef DEBUGGING
- StructCopy(&zero_scan_data, &data_fake, scan_data_t);
-#endif
-
- if ( depth == 0 ) {
- while (first_non_open && OP(first_non_open) == OPEN)
- first_non_open=regnext(first_non_open);
- }
-
-
- fake_study_recurse:
- while ( scan && OP(scan) != END && scan < last ){
- /* Peephole optimizer: */
- DEBUG_STUDYDATA("Peep:", data,depth);
- DEBUG_PEEP("Peep",scan,depth);
- JOIN_EXACT(scan,&min,0);
-
- /* Follow the next-chain of the current node and optimize
- away all the NOTHINGs from it. */
- if (OP(scan) != CURLYX) {
- const int max = (reg_off_by_arg[OP(scan)]
- ? I32_MAX
- /* I32 may be smaller than U16 on CRAYs! */
- : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX));
- int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan));
- int noff;
- regnode *n = scan;
-
- /* Skip NOTHING and LONGJMP. */
- while ((n = regnext(n))
- && ((PL_regkind[OP(n)] == NOTHING && (noff = NEXT_OFF(n)))
- || ((OP(n) == LONGJMP) && (noff = ARG(n))))
- && off + noff < max)
- off += noff;
- if (reg_off_by_arg[OP(scan)])
- ARG(scan) = off;
- else
- NEXT_OFF(scan) = off;
- }
-
-
-
- /* The principal pseudo-switch. Cannot be a switch, since we
- look into several different things. */
- if (OP(scan) == BRANCH || OP(scan) == BRANCHJ
- || OP(scan) == IFTHEN) {
- next = regnext(scan);
- code = OP(scan);
- /* demq: the op(next)==code check is to see if we have "branch-branch" AFAICT */
-
- if (OP(next) == code || code == IFTHEN) {
- /* NOTE - There is similar code to this block below for handling
- TRIE nodes on a re-study. If you change stuff here check there
- too. */
- I32 max1 = 0, min1 = I32_MAX, num = 0;
- struct regnode_charclass_class accum;
- regnode * const startbranch=scan;
-
- if (flags & SCF_DO_SUBSTR)
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- while (OP(scan) == code) {
- I32 deltanext, minnext, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- num++;
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
-
- data_fake.pos_delta = delta;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- if (code != BRANCH)
- scan = NEXTOPER(scan);
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- /* we suppose the run is continuous, last=next...*/
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- next, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- if (min1 > minnext)
- min1 = minnext;
- if (max1 < minnext + deltanext)
- max1 = minnext + deltanext;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
- scan = next;
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > minnext)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- if (code == IFTHEN && num < 2) /* Empty ELSE branch */
- min1 = 0;
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
-
- if (PERL_ENABLE_TRIE_OPTIMISATION && OP( startbranch ) == BRANCH ) {
- /* demq.
-
- Assuming this was/is a branch we are dealing with: 'scan' now
- points at the item that follows the branch sequence, whatever
- it is. We now start at the beginning of the sequence and look
- for subsequences of
-
- BRANCH->EXACT=>x1
- BRANCH->EXACT=>x2
- tail
-
- which would be constructed from a pattern like /A|LIST|OF|WORDS/
-
- If we can find such a subseqence we need to turn the first
- element into a trie and then add the subsequent branch exact
- strings to the trie.
-
- We have two cases
-
- 1. patterns where the whole set of branch can be converted.
-
- 2. patterns where only a subset can be converted.
-
- In case 1 we can replace the whole set with a single regop
- for the trie. In case 2 we need to keep the start and end
- branchs so
-
- 'BRANCH EXACT; BRANCH EXACT; BRANCH X'
- becomes BRANCH TRIE; BRANCH X;
-
- There is an additional case, that being where there is a
- common prefix, which gets split out into an EXACT like node
- preceding the TRIE node.
-
- If x(1..n)==tail then we can do a simple trie, if not we make
- a "jump" trie, such that when we match the appropriate word
- we "jump" to the appopriate tail node. Essentailly we turn
- a nested if into a case structure of sorts.
-
- */
-
- int made=0;
- if (!re_trie_maxbuff) {
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff))
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- if ( SvIV(re_trie_maxbuff)>=0 ) {
- regnode *cur;
- regnode *first = (regnode *)NULL;
- regnode *last = (regnode *)NULL;
- regnode *tail = scan;
- U8 optype = 0;
- U32 count=0;
-
-#ifdef DEBUGGING
- SV * const mysv = sv_newmortal(); /* for dumping */
-#endif
- /* var tail is used because there may be a TAIL
- regop in the way. Ie, the exacts will point to the
- thing following the TAIL, but the last branch will
- point at the TAIL. So we advance tail. If we
- have nested (?:) we may have to move through several
- tails.
- */
-
- while ( OP( tail ) == TAIL ) {
- /* this is the TAIL generated by (?:) */
- tail = regnext( tail );
- }
-
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, tail );
- PerlIO_printf( Perl_debug_log, "%*s%s%s\n",
- (int)depth * 2 + 2, "",
- "Looking for TRIE'able sequences. Tail node is: ",
- SvPV_nolen_const( mysv )
- );
- });
-
- /*
-
- step through the branches, cur represents each
- branch, noper is the first thing to be matched
- as part of that branch and noper_next is the
- regnext() of that node. if noper is an EXACT
- and noper_next is the same as scan (our current
- position in the regex) then the EXACT branch is
- a possible optimization target. Once we have
- two or more consequetive such branches we can
- create a trie of the EXACT's contents and stich
- it in place. If the sequence represents all of
- the branches we eliminate the whole thing and
- replace it with a single TRIE. If it is a
- subsequence then we need to stitch it in. This
- means the first branch has to remain, and needs
- to be repointed at the item on the branch chain
- following the last branch optimized. This could
- be either a BRANCH, in which case the
- subsequence is internal, or it could be the
- item following the branch sequence in which
- case the subsequence is at the end.
-
- */
-
- /* dont use tail as the end marker for this traverse */
- for ( cur = startbranch ; cur != scan ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
-#if defined(DEBUGGING) || defined(NOJUMPTRIE)
- regnode * const noper_next = regnext( noper );
-#endif
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log, "%*s- %s (%d)",
- (int)depth * 2 + 2,"", SvPV_nolen_const( mysv ), REG_NODE_NUM(cur) );
-
- regprop(RExC_rx, mysv, noper);
- PerlIO_printf( Perl_debug_log, " -> %s",
- SvPV_nolen_const(mysv));
-
- if ( noper_next ) {
- regprop(RExC_rx, mysv, noper_next );
- PerlIO_printf( Perl_debug_log,"\t=> %s\t",
- SvPV_nolen_const(mysv));
- }
- PerlIO_printf( Perl_debug_log, "(First==%d,Last==%d,Cur==%d)\n",
- REG_NODE_NUM(first), REG_NODE_NUM(last), REG_NODE_NUM(cur) );
- });
- if ( (((first && optype!=NOTHING) ? OP( noper ) == optype
- : PL_regkind[ OP( noper ) ] == EXACT )
- || OP(noper) == NOTHING )
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- && count < U16_MAX)
- {
- count++;
- if ( !first || optype == NOTHING ) {
- if (!first) first = cur;
- optype = OP( noper );
- } else {
- last = cur;
- }
- } else {
-/*
- Currently we do not believe that the trie logic can
- handle case insensitive matching properly when the
- pattern is not unicode (thus forcing unicode semantics).
-
- If/when this is fixed the following define can be swapped
- in below to fully enable trie logic.
-
-#define TRIE_TYPE_IS_SAFE 1
-
-*/
-#define TRIE_TYPE_IS_SAFE (UTF || optype==EXACT)
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- make_trie( pRExC_state,
- startbranch, first, cur, tail, count,
- optype, depth+1 );
- }
- if ( PL_regkind[ OP( noper ) ] == EXACT
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- ){
- count = 1;
- first = cur;
- optype = OP( noper );
- } else {
- count = 0;
- first = NULL;
- optype = 0;
- }
- last = NULL;
- }
- }
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log,
- "%*s- %s (%d) <SCAN FINISHED>\n", (int)depth * 2 + 2,
- "", SvPV_nolen_const( mysv ),REG_NODE_NUM(cur));
-
- });
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- made= make_trie( pRExC_state, startbranch, first, scan, tail, count, optype, depth+1 );
-#ifdef TRIE_STUDY_OPT
- if ( ((made == MADE_EXACT_TRIE &&
- startbranch == first)
- || ( first_non_open == first )) &&
- depth==0 ) {
- flags |= SCF_TRIE_RESTUDY;
- if ( startbranch == first
- && scan == tail )
- {
- RExC_seen &=~REG_TOP_LEVEL_BRANCHES;
- }
- }
-#endif
- }
- }
-
- } /* do trie */
-
- }
- else if ( code == BRANCHJ ) { /* single branch is optimized. */
- scan = NEXTOPER(NEXTOPER(scan));
- } else /* single branch is optimized. */
- scan = NEXTOPER(scan);
- continue;
- } else if (OP(scan) == SUSPEND || OP(scan) == GOSUB || OP(scan) == GOSTART) {
- scan_frame *newframe = NULL;
- I32 paren;
- regnode *start;
- regnode *end;
-
- if (OP(scan) != SUSPEND) {
- /* set the pointer */
- if (OP(scan) == GOSUB) {
- paren = ARG(scan);
- RExC_recurse[ARG2L(scan)] = scan;
- start = RExC_open_parens[paren-1];
- end = RExC_close_parens[paren-1];
- } else {
- paren = 0;
- start = RExC_rxi->program + 1;
- end = RExC_opend;
- }
- if (!recursed) {
- Newxz(recursed, (((RExC_npar)>>3) +1), U8);
- SAVEFREEPV(recursed);
- }
- if (!PAREN_TEST(recursed,paren+1)) {
- PAREN_SET(recursed,paren+1);
- Newx(newframe,1,scan_frame);
- } else {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- } else {
- Newx(newframe,1,scan_frame);
- paren = stopparen;
- start = scan+2;
- end = regnext(scan);
- }
- if (newframe) {
- assert(start);
- assert(end);
- SAVEFREEPV(newframe);
- newframe->next = regnext(scan);
- newframe->last = last;
- newframe->stop = stopparen;
- newframe->prev = frame;
-
- frame = newframe;
- scan = start;
- stopparen = paren;
- last = end;
-
- continue;
- }
- }
- else if (OP(scan) == EXACT) {
- I32 l = STR_LEN(scan);
- UV uc;
- if (UTF) {
- const U8 * const s = (U8*)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- } else {
- uc = *((U8*)STRING(scan));
- }
- min += l;
- if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */
- /* The code below prefers earlier match for fixed
- offset, later match for variable offset. */
- if (data->last_end == -1) { /* Update the start info. */
- data->last_start_min = data->pos_min;
- data->last_start_max = is_inf
- ? I32_MAX : data->pos_min + data->pos_delta;
- }
- sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan));
- if (UTF)
- SvUTF8_on(data->last_found);
- {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += utf8_length((U8*)STRING(scan),
- (U8*)STRING(scan)+STR_LEN(scan));
- }
- data->last_end = data->pos_min + l;
- data->pos_min += l; /* As in the first entry. */
- data->flags &= ~SF_BEFORE_EOL;
- }
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && (!(data->start_class->flags & ANYOF_FOLD)
- || !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- )
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- if (uc < 0x100)
- data->start_class->flags &= ~ANYOF_UNICODE_ALL;
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- /* false positive possible if the class is case-folded */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- else
- data->start_class->flags |= ANYOF_UNICODE_ALL;
- data->start_class->flags &= ~ANYOF_EOS;
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (PL_regkind[OP(scan)] == EXACT) { /* But OP != EXACT! */
- I32 l = STR_LEN(scan);
- UV uc = *((U8*)STRING(scan));
-
- /* Search for fixed substrings supports EXACT only. */
- if (flags & SCF_DO_SUBSTR) {
- assert(data);
- SCAN_COMMIT(pRExC_state, data, minlenp);
- }
- if (UTF) {
- const U8 * const s = (U8 *)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- }
- min += l;
- if (flags & SCF_DO_SUBSTR)
- data->pos_min += l;
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat) {
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- data->start_class->flags |= ANYOF_FOLD;
- if (OP(scan) == EXACTFL)
- data->start_class->flags |= ANYOF_LOCALE;
- }
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- if (data->start_class->flags & ANYOF_FOLD) {
- /* false positive possible if the class is case-folded.
- Assume that the locale settings are the same... */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- }
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (strchr((const char*)PL_varies,OP(scan))) {
- I32 mincount, maxcount, minnext, deltanext, fl = 0;
- I32 f = flags, pos_before = 0;
- regnode * const oscan = scan;
- struct regnode_charclass_class this_class;
- struct regnode_charclass_class *oclass = NULL;
- I32 next_is_eval = 0;
-
- switch (PL_regkind[OP(scan)]) {
- case WHILEM: /* End of (?:...)* . */
- scan = NEXTOPER(scan);
- goto finish;
- case PLUS:
- if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) {
- next = NEXTOPER(scan);
- if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) {
- mincount = 1;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- }
- if (flags & SCF_DO_SUBSTR)
- data->pos_min++;
- min++;
- /* Fall through. */
- case STAR:
- if (flags & SCF_DO_STCLASS) {
- mincount = 0;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- is_inf = is_inf_internal = 1;
- scan = regnext(scan);
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot extend fixed substrings */
- data->longest = &(data->longest_float);
- }
- goto optimize_curly_tail;
- case CURLY:
- if (stopparen>0 && (OP(scan)==CURLYN || OP(scan)==CURLYM)
- && (scan->flags == stopparen))
- {
- mincount = 1;
- maxcount = 1;
- } else {
- mincount = ARG1(scan);
- maxcount = ARG2(scan);
- }
- next = regnext(scan);
- if (OP(scan) == CURLYX) {
- I32 lp = (data ? *(data->last_closep) : 0);
- scan->flags = ((lp <= (I32)U8_MAX) ? (U8)lp : U8_MAX);
- }
- scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- next_is_eval = (OP(scan) == EVAL);
- do_curly:
- if (flags & SCF_DO_SUBSTR) {
- if (mincount == 0) SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot extend fixed substrings */
- pos_before = data->pos_min;
- }
- if (data) {
- fl = data->flags;
- data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL);
- if (is_inf)
- data->flags |= SF_IS_INF;
- }
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- oclass = data->start_class;
- data->start_class = &this_class;
- f |= SCF_DO_STCLASS_AND;
- f &= ~SCF_DO_STCLASS_OR;
- }
- /* These are the cases when once a subexpression
- fails at a particular position, it cannot succeed
- even after backtracking at the enclosing scope.
-
- XXXX what if minimal match and we are at the
- initial run of {n,m}? */
- if ((mincount != maxcount - 1) && (maxcount != REG_INFTY))
- f &= ~SCF_WHILEM_VISITED_POS;
-
- /* This will finish on WHILEM, setting scan, or on NULL: */
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- last, data, stopparen, recursed, NULL,
- (mincount == 0
- ? (f & ~SCF_DO_SUBSTR) : f),depth+1);
-
- if (flags & SCF_DO_STCLASS)
- data->start_class = oclass;
- if (mincount == 0 || minnext == 0) {
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&this_class, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- } else { /* Non-zero len */
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- cl_and(data->start_class, and_withp);
- }
- else if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class, &this_class);
- flags &= ~SCF_DO_STCLASS;
- }
- if (!scan) /* It was not CURLYX, but CURLY. */
- scan = next;
- if ( /* ? quantifier ok, except for (?{ ... }) */
- (next_is_eval || !(mincount == 0 && maxcount == 1))
- && (minnext == 0) && (deltanext == 0)
- && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR))
- && maxcount <= REG_INFTY/3) /* Complement check for big count */
- {
- ckWARNreg(RExC_parse,
- "Quantifier unexpected on zero-length expression");
- }
-
- min += minnext * mincount;
- is_inf_internal |= ((maxcount == REG_INFTY
- && (minnext + deltanext) > 0)
- || deltanext == I32_MAX);
- is_inf |= is_inf_internal;
- delta += (minnext + deltanext) * maxcount - minnext * mincount;
-
- /* Try powerful optimization CURLYX => CURLYN. */
- if ( OP(oscan) == CURLYX && data
- && data->flags & SF_IN_PAR
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext && minnext == 1 ) {
- /* Try to optimize to CURLYN. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS;
- regnode * const nxt1 = nxt;
-#ifdef DEBUGGING
- regnode *nxt2;
-#endif
-
- /* Skip open. */
- nxt = regnext(nxt);
- if (!strchr((const char*)PL_simple,OP(nxt))
- && !(PL_regkind[OP(nxt)] == EXACT
- && STR_LEN(nxt) == 1))
- goto nogo;
-#ifdef DEBUGGING
- nxt2 = nxt;
-#endif
- nxt = regnext(nxt);
- if (OP(nxt) != CLOSE)
- goto nogo;
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt+2; /*close->while*/
- }
- /* Now we know that nxt2 is the only contents: */
- oscan->flags = (U8)ARG(nxt);
- OP(oscan) = CURLYN;
- OP(nxt1) = NOTHING; /* was OPEN. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */
-#endif
- }
- nogo:
-
- /* Try optimization CURLYX => CURLYM. */
- if ( OP(oscan) == CURLYX && data
- && !(data->flags & SF_HAS_PAR)
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext /* atom is fixed width */
- && minnext != 0 /* CURLYM can't handle zero width */
- ) {
- /* XXXX How to optimize if data == 0? */
- /* Optimize to a simpler form. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */
- regnode *nxt2;
-
- OP(oscan) = CURLYM;
- while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/
- && (OP(nxt2) != WHILEM))
- nxt = nxt2;
- OP(nxt2) = SUCCEED; /* Whas WHILEM */
- /* Need to optimize away parenths. */
- if (data->flags & SF_IN_PAR) {
- /* Set the parenth number. */
- regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/
-
- if (OP(nxt) != CLOSE)
- FAIL("Panic opt close");
- oscan->flags = (U8)ARG(nxt);
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt2+1; /*close->NOTHING*/
- }
- OP(nxt1) = OPTIMIZED; /* was OPEN. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */
-#endif
-#if 0
- while ( nxt1 && (OP(nxt1) != WHILEM)) {
- regnode *nnxt = regnext(nxt1);
-
- if (nnxt == nxt) {
- if (reg_off_by_arg[OP(nxt1)])
- ARG_SET(nxt1, nxt2 - nxt1);
- else if (nxt2 - nxt1 < U16_MAX)
- NEXT_OFF(nxt1) = nxt2 - nxt1;
- else
- OP(nxt) = NOTHING; /* Cannot beautify */
- }
- nxt1 = nnxt;
- }
-#endif
- /* Optimize again: */
- study_chunk(pRExC_state, &nxt1, minlenp, &deltanext, nxt,
- NULL, stopparen, recursed, NULL, 0,depth+1);
- }
- else
- oscan->flags = 0;
- }
- else if ((OP(oscan) == CURLYX)
- && (flags & SCF_WHILEM_VISITED_POS)
- /* See the comment on a similar expression above.
- However, this time it not a subexpression
- we care about, but the expression itself. */
- && (maxcount == REG_INFTY)
- && data && ++data->whilem_c < 16) {
- /* This stays as CURLYX, we can put the count/of pair. */
- /* Find WHILEM (as in regexec.c) */
- regnode *nxt = oscan + NEXT_OFF(oscan);
-
- if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */
- nxt += ARG(nxt);
- PREVOPER(nxt)->flags = (U8)(data->whilem_c
- | (RExC_whilem_seen << 4)); /* On WHILEM */
- }
- if (data && fl & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (flags & SCF_DO_SUBSTR) {
- SV *last_str = NULL;
- int counted = mincount != 0;
-
- if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */
-#if defined(SPARC64_GCC_WORKAROUND)
- I32 b = 0;
- STRLEN l = 0;
- const char *s = NULL;
- I32 old = 0;
-
- if (pos_before >= data->last_start_min)
- b = pos_before;
- else
- b = data->last_start_min;
-
- l = 0;
- s = SvPV_const(data->last_found, l);
- old = b - data->last_start_min;
-
-#else
- I32 b = pos_before >= data->last_start_min
- ? pos_before : data->last_start_min;
- STRLEN l;
- const char * const s = SvPV_const(data->last_found, l);
- I32 old = b - data->last_start_min;
-#endif
-
- if (UTF)
- old = utf8_hop((U8*)s, old) - (U8*)s;
-
- l -= old;
- /* Get the added string: */
- last_str = newSVpvn_utf8(s + old, l, UTF);
- if (deltanext == 0 && pos_before == b) {
- /* What was added is a constant string */
- if (mincount > 1) {
- SvGROW(last_str, (mincount * l) + 1);
- repeatcpy(SvPVX(last_str) + l,
- SvPVX_const(last_str), l, mincount - 1);
- SvCUR_set(last_str, SvCUR(last_str) * mincount);
- /* Add additional parts. */
- SvCUR_set(data->last_found,
- SvCUR(data->last_found) - l);
- sv_catsv(data->last_found, last_str);
- {
- SV * sv = data->last_found;
- MAGIC *mg =
- SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += CHR_SVLEN(last_str) - l;
- }
- data->last_end += l * (mincount - 1);
- }
- } else {
- /* start offset must point into the last copy */
- data->last_start_min += minnext * (mincount - 1);
- data->last_start_max += is_inf ? I32_MAX
- : (maxcount - 1) * (minnext + data->pos_delta);
- }
- }
- /* It is counted once already... */
- data->pos_min += minnext * (mincount - counted);
- data->pos_delta += - counted * deltanext +
- (minnext + deltanext) * maxcount - minnext * mincount;
- if (mincount != maxcount) {
- /* Cannot extend fixed substrings found inside
- the group. */
- SCAN_COMMIT(pRExC_state,data,minlenp);
- if (mincount && last_str) {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
-
- if (mg)
- mg->mg_len = -1;
- sv_setsv(sv, last_str);
- data->last_end = data->pos_min;
- data->last_start_min =
- data->pos_min - CHR_SVLEN(last_str);
- data->last_start_max = is_inf
- ? I32_MAX
- : data->pos_min + data->pos_delta
- - CHR_SVLEN(last_str);
- }
- data->longest = &(data->longest_float);
- }
- SvREFCNT_dec(last_str);
- }
- if (data && (fl & SF_HAS_EVAL))
- data->flags |= SF_HAS_EVAL;
- optimize_curly_tail:
- if (OP(oscan) != CURLYX) {
- while (PL_regkind[OP(next = regnext(oscan))] == NOTHING
- && NEXT_OFF(next))
- NEXT_OFF(oscan) += NEXT_OFF(next);
- }
- continue;
- default: /* REF and CLUMP only? */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR)
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- break;
- }
- }
- else if (OP(scan) == LNBREAK) {
- if (flags & SCF_DO_STCLASS) {
- int value = 0;
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
- if (flags & SCF_DO_STCLASS_AND) {
- for (value = 0; value < 256; value++)
- if (!is_VERTWS_cp(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- for (value = 0; value < 256; value++)
- if (is_VERTWS_cp(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- min += 1;
- delta += 1;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += 1;
- data->longest = &(data->longest_float);
- }
-
- }
- else if (OP(scan) == FOLDCHAR) {
- int d = ARG(scan)==0xDF ? 1 : 2;
- flags &= ~SCF_DO_STCLASS;
- min += 1;
- delta += d;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += d;
- data->longest = &(data->longest_float);
- }
- }
- else if (strchr((const char*)PL_simple,OP(scan))) {
- int value = 0;
-
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->pos_min++;
- }
- min++;
- if (flags & SCF_DO_STCLASS) {
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
-
- /* Some of the logic below assumes that switching
- locale on will only add false positives. */
- switch (PL_regkind[OP(scan)]) {
- case SANY:
- default:
- do_default:
- /* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- break;
- case REG_ANY:
- if (OP(scan) == SANY)
- goto do_default;
- if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */
- value = (ANYOF_BITMAP_TEST(data->start_class,'\n')
- || (data->start_class->flags & ANYOF_CLASS));
- cl_anything(pRExC_state, data->start_class);
- }
- if (flags & SCF_DO_STCLASS_AND || !value)
- ANYOF_BITMAP_CLEAR(data->start_class,'\n');
- break;
- case ANYOF:
- if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class,
- (struct regnode_charclass_class*)scan);
- else
- cl_or(pRExC_state, data->start_class,
- (struct regnode_charclass_class*)scan);
- break;
- case ALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case ALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- }
- else {
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- data->start_class->flags |= ANYOF_LOCALE;
- }
- break;
- case NALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- }
- break;
- case SPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- else {
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case SPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- }
- break;
- case NSPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- else {
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NSPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- }
- break;
- case DIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT);
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NDIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT);
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- CASE_SYNST_FNC(VERTWS);
- CASE_SYNST_FNC(HORIZWS);
-
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (PL_regkind[OP(scan)] == EOL && flags & SCF_DO_SUBSTR) {
- data->flags |= (OP(scan) == MEOL
- ? SF_BEFORE_MEOL
- : SF_BEFORE_SEOL);
- }
- else if ( PL_regkind[OP(scan)] == BRANCHJ
- /* Lookbehind, or need to calculate parens/evals/stclass: */
- && (scan->flags || data || (flags & SCF_DO_STCLASS))
- && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) {
- if ( !PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- || OP(scan) == UNLESSM )
- {
- /* Negative Lookahead/lookbehind
- In this case we can't do fixed string optimisation.
- */
-
- I32 deltanext, minnext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
- minnext = study_chunk(pRExC_state, &nscan, minlenp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f, depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (minnext > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)minnext;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (f & SCF_DO_STCLASS_AND) {
- if (flags & SCF_DO_STCLASS_OR) {
- /* OR before, AND after: ideally we would recurse with
- * data_fake to get the AND applied by study of the
- * remainder of the pattern, and then derecurse;
- * *** HACK *** for now just treat as "no information".
- * See [perl #56690].
- */
- cl_init(pRExC_state, data->start_class);
- } else {
- /* AND before and after: combine and continue */
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- }
-#if PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- else {
- /* Positive Lookahead/lookbehind
- In this case we can do fixed string optimisation,
- but we must be careful about it. Note in the case of
- lookbehind the positions will be offset by the minimum
- length of the pattern, something we won't know about
- until after the recurse.
- */
- I32 deltanext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
- /* We use SAVEFREEPV so that when the full compile
- is finished perl will clean up the allocated
- minlens when its all done. This was we don't
- have to worry about freeing them when we know
- they wont be used, which would be a pain.
- */
- I32 *minnextp;
- Newx( minnextp, 1, I32 );
- SAVEFREEPV(minnextp);
-
- if (data) {
- StructCopy(data, &data_fake, scan_data_t);
- if ((flags & SCF_DO_SUBSTR) && data->last_found) {
- f |= SCF_DO_SUBSTR;
- if (scan->flags)
- SCAN_COMMIT(pRExC_state, &data_fake,minlenp);
- data_fake.last_found=newSVsv(data->last_found);
- }
- }
- else
- data_fake.last_closep = &fake;
- data_fake.flags = 0;
- data_fake.pos_delta = delta;
- if (is_inf)
- data_fake.flags |= SF_IS_INF;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
-
- *minnextp = study_chunk(pRExC_state, &nscan, minnextp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f,depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (*minnextp > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)*minnextp;
- }
-
- *minnextp += min;
-
- if (f & SCF_DO_STCLASS_AND) {
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- if ((flags & SCF_DO_SUBSTR) && data_fake.last_found) {
- if (RExC_rx->minlen<*minnextp)
- RExC_rx->minlen=*minnextp;
- SCAN_COMMIT(pRExC_state, &data_fake, minnextp);
- SvREFCNT_dec(data_fake.last_found);
-
- if ( data_fake.minlen_fixed != minlenp )
- {
- data->offset_fixed= data_fake.offset_fixed;
- data->minlen_fixed= data_fake.minlen_fixed;
- data->lookbehind_fixed+= scan->flags;
- }
- if ( data_fake.minlen_float != minlenp )
- {
- data->minlen_float= data_fake.minlen_float;
- data->offset_float_min=data_fake.offset_float_min;
- data->offset_float_max=data_fake.offset_float_max;
- data->lookbehind_float+= scan->flags;
- }
- }
- }
-
-
- }
-#endif
- }
- else if (OP(scan) == OPEN) {
- if (stopparen != (I32)ARG(scan))
- pars++;
- }
- else if (OP(scan) == CLOSE) {
- if (stopparen == (I32)ARG(scan)) {
- break;
- }
- if ((I32)ARG(scan) == is_par) {
- next = regnext(scan);
-
- if ( next && (OP(next) != WHILEM) && next < last)
- is_par = 0; /* Disable optimization */
- }
- if (data)
- *(data->last_closep) = ARG(scan);
- }
- else if (OP(scan) == EVAL) {
- if (data)
- data->flags |= SF_HAS_EVAL;
- }
- else if ( PL_regkind[OP(scan)] == ENDLIKE ) {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- flags &= ~SCF_DO_SUBSTR;
- }
- if (data && OP(scan)==ACCEPT) {
- data->flags |= SCF_SEEN_ACCEPT;
- if (stopmin > min)
- stopmin = min;
- }
- }
- else if (OP(scan) == LOGICAL && scan->flags == 2) /* Embedded follows */
- {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- else if (OP(scan) == GPOS) {
- if (!(RExC_rx->extflags & RXf_GPOS_FLOAT) &&
- !(delta || is_inf || (data && data->pos_delta)))
- {
- if (!(RExC_rx->extflags & RXf_ANCH) && (flags & SCF_DO_SUBSTR))
- RExC_rx->extflags |= RXf_ANCH_GPOS;
- if (RExC_rx->gofs < (U32)min)
- RExC_rx->gofs = min;
- } else {
- RExC_rx->extflags |= RXf_GPOS_FLOAT;
- RExC_rx->gofs = 0;
- }
- }
-#ifdef TRIE_STUDY_OPT
-#ifdef FULL_TRIE_STUDY
- else if (PL_regkind[OP(scan)] == TRIE) {
- /* NOTE - There is similar code to this block above for handling
- BRANCH nodes on the initial study. If you change stuff here
- check there too. */
- regnode *trie_node= scan;
- regnode *tail= regnext(scan);
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- I32 max1 = 0, min1 = I32_MAX;
- struct regnode_charclass_class accum;
-
- if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */
- SCAN_COMMIT(pRExC_state, data,minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- if (!trie->jump) {
- min1= trie->minlen;
- max1= trie->maxlen;
- } else {
- const regnode *nextbranch= NULL;
- U32 word;
-
- for ( word=1 ; word <= trie->wordcount ; word++)
- {
- I32 deltanext=0, minnext=0, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- if (trie->jump[word]) {
- if (!nextbranch)
- nextbranch = trie_node + trie->jump[0];
- scan= trie_node + trie->jump[word];
- /* We go from the jump point to the branch that follows
- it. Note this means we need the vestigal unused branches
- even though they arent otherwise used.
- */
- minnext = study_chunk(pRExC_state, &scan, minlenp,
- &deltanext, (regnode *)nextbranch, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode*)nextbranch);
-
- if (min1 > (I32)(minnext + trie->minlen))
- min1 = minnext + trie->minlen;
- if (max1 < (I32)(minnext + deltanext + trie->maxlen))
- max1 = minnext + deltanext + trie->maxlen;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
-
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > min + min1)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- }
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- scan= tail;
- continue;
- }
-#else
- else if (PL_regkind[OP(scan)] == TRIE) {
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- U8*bang=NULL;
-
- min += trie->minlen;
- delta += (trie->maxlen - trie->minlen);
- flags &= ~SCF_DO_STCLASS; /* xxx */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += trie->minlen;
- data->pos_delta += (trie->maxlen - trie->minlen);
- if (trie->maxlen != trie->minlen)
- data->longest = &(data->longest_float);
- }
- if (trie->jump) /* no more substrings -- for now /grr*/
- flags &= ~SCF_DO_SUBSTR;
- }
-#endif /* old or new */
-#endif /* TRIE_STUDY_OPT */
-
- /* Else: zero-length, ignore. */
- scan = regnext(scan);
- }
- if (frame) {
- last = frame->last;
- scan = frame->next;
- stopparen = frame->stop;
- frame = frame->prev;
- goto fake_study_recurse;
- }
-
- finish:
- assert(!frame);
- DEBUG_STUDYDATA("pre-fin:",data,depth);
-
- *scanp = scan;
- *deltap = is_inf_internal ? I32_MAX : delta;
- if (flags & SCF_DO_SUBSTR && is_inf)
- data->pos_delta = I32_MAX - data->pos_min;
- if (is_par > (I32)U8_MAX)
- is_par = 0;
- if (is_par && pars==1 && data) {
- data->flags |= SF_IN_PAR;
- data->flags &= ~SF_HAS_PAR;
- }
- else if (pars && data) {
- data->flags |= SF_HAS_PAR;
- data->flags &= ~SF_IN_PAR;
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- if (flags & SCF_TRIE_RESTUDY)
- data->flags |= SCF_TRIE_RESTUDY;
-
- DEBUG_STUDYDATA("post-fin:",data,depth);
-
- return min < stopmin ? min : stopmin;
-}
-
-STATIC U32
-S_add_data(RExC_state_t *pRExC_state, U32 n, const char *s)
-{
- U32 count = RExC_rxi->data ? RExC_rxi->data->count : 0;
-
- PERL_ARGS_ASSERT_ADD_DATA;
-
- Renewc(RExC_rxi->data,
- sizeof(*RExC_rxi->data) + sizeof(void*) * (count + n - 1),
- char, struct reg_data);
- if(count)
- Renew(RExC_rxi->data->what, count + n, U8);
- else
- Newx(RExC_rxi->data->what, n, U8);
- RExC_rxi->data->count = count + n;
- Copy(s, RExC_rxi->data->what + count, n, U8);
- return count;
-}
-
-/*XXX: todo make this not included in a non debugging perl */
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_reginitcolors(pTHX)
-{
- dVAR;
- const char * const s = PerlEnv_getenv("PERL_RE_COLORS");
- if (s) {
- char *t = savepv(s);
- int i = 0;
- PL_colors[0] = t;
- while (++i < 6) {
- t = strchr(t, '\t');
- if (t) {
- *t = '\0';
- PL_colors[i] = ++t;
- }
- else
- PL_colors[i] = t = (char *)"";
- }
- } else {
- int i = 0;
- while (i < 6)
- PL_colors[i++] = (char *)"";
- }
- PL_colorset = 1;
-}
-#endif
-
-
-#ifdef TRIE_STUDY_OPT
-#define CHECK_RESTUDY_GOTO \
- if ( \
- (data.flags & SCF_TRIE_RESTUDY) \
- && ! restudied++ \
- ) goto reStudy
-#else
-#define CHECK_RESTUDY_GOTO
-#endif
-
-/*
- - pregcomp - compile a regular expression into internal code
- *
- * We can't allocate space until we know how big the compiled form will be,
- * but we can't compile it (and thus know how big it is) until we've got a
- * place to put the code. So we cheat: we compile it twice, once with code
- * generation turned off and size counting turned on, and once "for real".
- * This also means that we don't allocate space until we are sure that the
- * thing really will compile successfully, and we never have to move the
- * code and thus invalidate pointers into it. (Note that it has to be in
- * one piece because free() must be able to free it all.) [NB: not true in perl]
- *
- * Beware that the optimization-preparation code in here knows about some
- * of the structure of the compiled regexp. [I'll say.]
- */
-
-
-
-#ifndef PERL_IN_XSUB_RE
-#define RE_ENGINE_PTR &reh_regexp_engine
-#else
-extern const struct regexp_engine my_reg_engine;
-#define RE_ENGINE_PTR &my_reg_engine
-#endif
-
-#ifndef PERL_IN_XSUB_RE
-REGEXP *
-Perl_pregcomp(pTHX_ SV * const pattern, const U32 flags)
-{
- dVAR;
- HV * const table = GvHV(PL_hintgv);
-
- PERL_ARGS_ASSERT_PREGCOMP;
-
- /* Dispatch a request to compile a regexp to correct
- regexp engine. */
- if (table) {
- SV **ptr= hv_fetchs(table, "regcomp", FALSE);
- GET_RE_DEBUG_FLAGS_DECL;
- if (ptr && SvIOK(*ptr) && SvIV(*ptr)) {
- const regexp_engine *eng=INT2PTR(regexp_engine*,SvIV(*ptr));
- DEBUG_COMPILE_r({
- PerlIO_printf(Perl_debug_log, "Using engine %"UVxf"\n",
- SvIV(*ptr));
- });
- return CALLREGCOMP_ENG(eng, pattern, flags);
- }
- }
- return Perl_re_compile(aTHX_ pattern, flags);
-}
-#endif
-
-REGEXP *
-Perl_re_compile(pTHX_ SV * const pattern, U32 pm_flags)
-{
- dVAR;
- REGEXP *rx;
- struct regexp *r;
- register regexp_internal *ri;
- STRLEN plen;
- char *exp = SvPV(pattern, plen);
- char* xend = exp + plen;
- regnode *scan;
- I32 flags;
- I32 minlen = 0;
- I32 sawplus = 0;
- I32 sawopen = 0;
- scan_data_t data;
- RExC_state_t RExC_state;
- RExC_state_t * const pRExC_state = &RExC_state;
-#ifdef TRIE_STUDY_OPT
- int restudied= 0;
- RExC_state_t copyRExC_state;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_COMPILE;
-
- DEBUG_r(if (!PL_colorset) reginitcolors());
-
- RExC_utf8 = RExC_orig_utf8 = SvUTF8(pattern);
-
- DEBUG_COMPILE_r({
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RExC_utf8,
- dsv, exp, plen, 60);
- PerlIO_printf(Perl_debug_log, "%sCompiling REx%s %s\n",
- PL_colors[4],PL_colors[5],s);
- });
-
-redo_first_pass:
- RExC_precomp = exp;
- RExC_flags = pm_flags;
- RExC_sawback = 0;
-
- RExC_seen = 0;
- RExC_seen_zerolen = *exp == '^' ? -1 : 0;
- RExC_seen_evals = 0;
- RExC_extralen = 0;
-
- /* First pass: determine size, legality. */
- RExC_parse = exp;
- RExC_start = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_nestroot = 0;
- RExC_size = 0L;
- RExC_emit = &PL_regdummy;
- RExC_whilem_seen = 0;
- RExC_charnames = NULL;
- RExC_open_parens = NULL;
- RExC_close_parens = NULL;
- RExC_opend = NULL;
- RExC_paren_names = NULL;
-#ifdef DEBUGGING
- RExC_paren_name_list = NULL;
-#endif
- RExC_recurse = NULL;
- RExC_recurse_count = 0;
-
-#if 0 /* REGC() is (currently) a NOP at the first pass.
- * Clever compilers notice this and complain. --jhi */
- REGC((U8)REG_MAGIC, (char*)RExC_emit);
-#endif
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n"));
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- RExC_precomp = NULL;
- return(NULL);
- }
- if (RExC_utf8 && !RExC_orig_utf8) {
- /* It's possible to write a regexp in ascii that represents Unicode
- codepoints outside of the byte range, such as via \x{100}. If we
- detect such a sequence we have to convert the entire pattern to utf8
- and then recompile, as our sizing calculation will have been based
- on 1 byte == 1 character, but we will need to use utf8 to encode
- at least some part of the pattern, and therefore must convert the whole
- thing.
- XXX: somehow figure out how to make this less expensive...
- -- dmq */
- STRLEN len = plen;
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log,
- "UTF8 mismatch! Converting to utf8 for resizing and compile\n"));
- exp = (char*)Perl_bytes_to_utf8(aTHX_ (U8*)exp, &len);
- xend = exp + len;
- RExC_orig_utf8 = RExC_utf8;
- SAVEFREEPV(exp);
- goto redo_first_pass;
- }
- DEBUG_PARSE_r({
- PerlIO_printf(Perl_debug_log,
- "Required size %"IVdf" nodes\n"
- "Starting second pass (creation)\n",
- (IV)RExC_size);
- RExC_lastnum=0;
- RExC_lastparse=NULL;
- });
- /* Small enough for pointer-storage convention?
- If extralen==0, this means that we will not need long jumps. */
- if (RExC_size >= 0x10000L && RExC_extralen)
- RExC_size += RExC_extralen;
- else
- RExC_extralen = 0;
- if (RExC_whilem_seen > 15)
- RExC_whilem_seen = 15;
-
- /* Allocate space and zero-initialize. Note, the two step process
- of zeroing when in debug mode, thus anything assigned has to
- happen after that */
- rx = (REGEXP*) newSV_type(SVt_REGEXP);
- r = (struct regexp*)SvANY(rx);
- Newxc(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode),
- char, regexp_internal);
- if ( r == NULL || ri == NULL )
- FAIL("Regexp out of space");
-#ifdef DEBUGGING
- /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */
- Zero(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode), char);
-#else
- /* bulk initialize base fields with 0. */
- Zero(ri, sizeof(regexp_internal), char);
-#endif
-
- /* non-zero initialization begins here */
- RXi_SET( r, ri );
- r->engine= RE_ENGINE_PTR;
- r->extflags = pm_flags;
- {
- bool has_p = ((r->extflags & RXf_PMf_KEEPCOPY) == RXf_PMf_KEEPCOPY);
- bool has_minus = ((r->extflags & RXf_PMf_STD_PMMOD) != RXf_PMf_STD_PMMOD);
- bool has_runon = ((RExC_seen & REG_SEEN_RUN_ON_COMMENT)==REG_SEEN_RUN_ON_COMMENT);
- U16 reganch = (U16)((r->extflags & RXf_PMf_STD_PMMOD)
- >> RXf_PMf_STD_PMMOD_SHIFT);
- const char *fptr = STD_PAT_MODS; /*"msix"*/
- char *p;
- const STRLEN wraplen = plen + has_minus + has_p + has_runon
- + (sizeof(STD_PAT_MODS) - 1)
- + (sizeof("(?:)") - 1);
-
- p = sv_grow(MUTABLE_SV(rx), wraplen + 1);
- SvCUR_set(rx, wraplen);
- SvPOK_on(rx);
- SvFLAGS(rx) |= SvUTF8(pattern);
- *p++='('; *p++='?';
- if (has_p)
- *p++ = KEEPCOPY_PAT_MOD; /*'p'*/
- {
- char *r = p + (sizeof(STD_PAT_MODS) - 1) + has_minus - 1;
- char *colon = r + 1;
- char ch;
-
- while((ch = *fptr++)) {
- if(reganch & 1)
- *p++ = ch;
- else
- *r-- = ch;
- reganch >>= 1;
- }
- if(has_minus) {
- *r = '-';
- p = colon;
- }
- }
-
- *p++ = ':';
- Copy(RExC_precomp, p, plen, char);
- assert ((RX_WRAPPED(rx) - p) < 16);
- r->pre_prefix = p - RX_WRAPPED(rx);
- p += plen;
- if (has_runon)
- *p++ = '\n';
- *p++ = ')';
- *p = 0;
- }
-
- r->intflags = 0;
- r->nparens = RExC_npar - 1; /* set early to validate backrefs */
-
- if (RExC_seen & REG_SEEN_RECURSE) {
- Newxz(RExC_open_parens, RExC_npar,regnode *);
- SAVEFREEPV(RExC_open_parens);
- Newxz(RExC_close_parens,RExC_npar,regnode *);
- SAVEFREEPV(RExC_close_parens);
- }
-
- /* Useful during FAIL. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- Newxz(ri->u.offsets, 2*RExC_size+1, U32); /* MJD 20001228 */
- DEBUG_OFFSETS_r(PerlIO_printf(Perl_debug_log,
- "%s %"UVuf" bytes for offset annotations.\n",
- ri->u.offsets ? "Got" : "Couldn't get",
- (UV)((2*RExC_size+1) * sizeof(U32))));
-#endif
- SetProgLen(ri,RExC_size);
- RExC_rx_sv = rx;
- RExC_rx = r;
- RExC_rxi = ri;
- REH_CALL_COMP_BEGIN_HOOK(pRExC_state->rx);
-
- /* Second pass: emit code. */
- RExC_flags = pm_flags; /* don't let top level (?i) bleed */
- RExC_parse = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_emit_start = ri->program;
- RExC_emit = ri->program;
- RExC_emit_bound = ri->program + RExC_size + 1;
-
- /* Store the count of eval-groups for security checks: */
- RExC_rx->seen_evals = RExC_seen_evals;
- REGC((U8)REG_MAGIC, (char*) RExC_emit++);
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- ReREFCNT_dec(rx);
- return(NULL);
- }
- /* XXXX To minimize changes to RE engine we always allocate
- 3-units-long substrs field. */
- Newx(r->substrs, 1, struct reg_substr_data);
- if (RExC_recurse_count) {
- Newxz(RExC_recurse,RExC_recurse_count,regnode *);
- SAVEFREEPV(RExC_recurse);
- }
-
-reStudy:
- r->minlen = minlen = sawplus = sawopen = 0;
- Zero(r->substrs, 1, struct reg_substr_data);
-
-#ifdef TRIE_STUDY_OPT
- if (!restudied) {
- StructCopy(&zero_scan_data, &data, scan_data_t);
- copyRExC_state = RExC_state;
- } else {
- U32 seen=RExC_seen;
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log,"Restudying\n"));
-
- RExC_state = copyRExC_state;
- if (seen & REG_TOP_LEVEL_BRANCHES)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
- else
- RExC_seen &= ~REG_TOP_LEVEL_BRANCHES;
- if (data.last_found) {
- SvREFCNT_dec(data.longest_fixed);
- SvREFCNT_dec(data.longest_float);
- SvREFCNT_dec(data.last_found);
- }
- StructCopy(&zero_scan_data, &data, scan_data_t);
- }
-#else
- StructCopy(&zero_scan_data, &data, scan_data_t);
-#endif
-
- /* Dig out information for optimizations. */
- r->extflags = RExC_flags; /* was pm_op */
- /*dmq: removed as part of de-PMOP: pm->op_pmflags = RExC_flags; */
-
- if (UTF)
- SvUTF8_on(rx); /* Unicode in it? */
- ri->regstclass = NULL;
- if (RExC_naughty >= 10) /* Probably an expensive pattern. */
- r->intflags |= PREGf_NAUGHTY;
- scan = ri->program + 1; /* First BRANCH. */
-
- /* testing for BRANCH here tells us whether there is "must appear"
- data in the pattern. If there is then we can use it for optimisations */
- if (!(RExC_seen & REG_TOP_LEVEL_BRANCHES)) { /* Only one top-level choice. */
- I32 fake;
- STRLEN longest_float_length, longest_fixed_length;
- struct regnode_charclass_class ch_class; /* pointed to by data */
- int stclass_flag;
- I32 last_close = 0; /* pointed to by data */
- regnode *first= scan;
- regnode *first_next= regnext(first);
-
- /*
- * Skip introductions and multiplicators >= 1
- * so that we can extract the 'meat' of the pattern that must
- * match in the large if() sequence following.
- * NOTE that EXACT is NOT covered here, as it is normally
- * picked up by the optimiser separately.
- *
- * This is unfortunate as the optimiser isnt handling lookahead
- * properly currently.
- *
- */
- while ((OP(first) == OPEN && (sawopen = 1)) ||
- /* An OR of *one* alternative - should not happen now. */
- (OP(first) == BRANCH && OP(first_next) != BRANCH) ||
- /* for now we can't handle lookbehind IFMATCH*/
- (OP(first) == IFMATCH && !first->flags) ||
- (OP(first) == PLUS) ||
- (OP(first) == MINMOD) ||
- /* An {n,m} with n>0 */
- (PL_regkind[OP(first)] == CURLY && ARG1(first) > 0) ||
- (OP(first) == NOTHING && PL_regkind[OP(first_next)] != END ))
- {
- /*
- * the only op that could be a regnode is PLUS, all the rest
- * will be regnode_1 or regnode_2.
- *
- */
- if (OP(first) == PLUS)
- sawplus = 1;
- else
- first += regarglen[OP(first)];
-
- first = NEXTOPER(first);
- first_next= regnext(first);
- }
-
- /* Starting-point info. */
- again:
- DEBUG_PEEP("first:",first,0);
- /* Ignore EXACT as we deal with it later. */
- if (PL_regkind[OP(first)] == EXACT) {
- if (OP(first) == EXACT)
- NOOP; /* Empty, get anchored substr later. */
- else if ((OP(first) == EXACTF || OP(first) == EXACTFL))
- ri->regstclass = first;
- }
-#ifdef TRIE_STCLASS
- else if (PL_regkind[OP(first)] == TRIE &&
- ((reg_trie_data *)ri->data->data[ ARG(first) ])->minlen>0)
- {
- regnode *trie_op;
- /* this can happen only on restudy */
- if ( OP(first) == TRIE ) {
- struct regnode_1 *trieop = (struct regnode_1 *)
- PerlMemShared_calloc(1, sizeof(struct regnode_1));
- StructCopy(first,trieop,struct regnode_1);
- trie_op=(regnode *)trieop;
- } else {
- struct regnode_charclass *trieop = (struct regnode_charclass *)
- PerlMemShared_calloc(1, sizeof(struct regnode_charclass));
- StructCopy(first,trieop,struct regnode_charclass);
- trie_op=(regnode *)trieop;
- }
- OP(trie_op)+=2;
- make_trie_failtable(pRExC_state, (regnode *)first, trie_op, 0);
- ri->regstclass = trie_op;
- }
-#endif
- else if (strchr((const char*)PL_simple,OP(first)))
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOUND ||
- PL_regkind[OP(first)] == NBOUND)
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOL) {
- r->extflags |= (OP(first) == MBOL
- ? RXf_ANCH_MBOL
- : (OP(first) == SBOL
- ? RXf_ANCH_SBOL
- : RXf_ANCH_BOL));
- first = NEXTOPER(first);
- goto again;
- }
- else if (OP(first) == GPOS) {
- r->extflags |= RXf_ANCH_GPOS;
- first = NEXTOPER(first);
- goto again;
- }
- else if ((!sawopen || !RExC_sawback) &&
- (OP(first) == STAR &&
- PL_regkind[OP(NEXTOPER(first))] == REG_ANY) &&
- !(r->extflags & RXf_ANCH) && !(RExC_seen & REG_SEEN_EVAL))
- {
- /* turn .* into ^.* with an implied $*=1 */
- const int type =
- (OP(NEXTOPER(first)) == REG_ANY)
- ? RXf_ANCH_MBOL
- : RXf_ANCH_SBOL;
- r->extflags |= type;
- r->intflags |= PREGf_IMPLICIT;
- first = NEXTOPER(first);
- goto again;
- }
- if (sawplus && (!sawopen || !RExC_sawback)
- && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */
- /* x+ must match at the 1st pos of run of x's */
- r->intflags |= PREGf_SKIP;
-
- /* Scan is after the zeroth branch, first is atomic matcher. */
-#ifdef TRIE_STUDY_OPT
- DEBUG_PARSE_r(
- if (!restudied)
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#else
- DEBUG_PARSE_r(
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#endif
-
-
- /*
- * If there's something expensive in the r.e., find the
- * longest literal string that must appear and make it the
- * regmust. Resolve ties in favor of later strings, since
- * the regstart check works with the beginning of the r.e.
- * and avoiding duplication strengthens checking. Not a
- * strong reason, but sufficient in the absence of others.
- * [Now we resolve ties in favor of the earlier string if
- * it happens that c_offset_min has been invalidated, since the
- * earlier string may buy us something the later one won't.]
- */
-
- data.longest_fixed = newSVpvs("");
- data.longest_float = newSVpvs("");
- data.last_found = newSVpvs("");
- data.longest = &(data.longest_fixed);
- first = scan;
- if (!ri->regstclass) {
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- stclass_flag = SCF_DO_STCLASS_AND;
- } else /* XXXX Check for BOUND? */
- stclass_flag = 0;
- data.last_closep = &last_close;
-
- minlen = study_chunk(pRExC_state, &first, &minlen, &fake, scan + RExC_size, /* Up to end */
- &data, -1, NULL, NULL,
- SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag,0);
-
-
- CHECK_RESTUDY_GOTO;
-
-
- if ( RExC_npar == 1 && data.longest == &(data.longest_fixed)
- && data.last_start_min == 0 && data.last_end > 0
- && !RExC_seen_zerolen
- && !(RExC_seen & REG_SEEN_VERBARG)
- && (!(RExC_seen & REG_SEEN_GPOS) || (r->extflags & RXf_ANCH_GPOS)))
- r->extflags |= RXf_CHECK_ALL;
- scan_commit(pRExC_state, &data,&minlen,0);
- SvREFCNT_dec(data.last_found);
-
- /* Note that code very similar to this but for anchored string
- follows immediately below, changes may need to be made to both.
- Be careful.
- */
- longest_float_length = CHR_SVLEN(data.longest_float);
- if (longest_float_length
- || (data.flags & SF_FL_BEFORE_EOL
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */
- && data.offset_fixed == data.offset_float_min
- && SvCUR(data.longest_fixed) == SvCUR(data.longest_float))
- goto remove_float; /* As in (a)+. */
-
- /* copy the information about the longest float from the reg_scan_data
- over to the program. */
- if (SvUTF8(data.longest_float)) {
- r->float_utf8 = data.longest_float;
- r->float_substr = NULL;
- } else {
- r->float_substr = data.longest_float;
- r->float_utf8 = NULL;
- }
- /* float_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_float ? *(data.minlen_float)
- : (I32)longest_float_length;
- r->float_end_shift = ml - data.offset_float_min
- - longest_float_length + (SvTAIL(data.longest_float) != 0)
- + data.lookbehind_float;
- r->float_min_offset = data.offset_float_min - data.lookbehind_float;
- r->float_max_offset = data.offset_float_max;
- if (data.offset_float_max < I32_MAX) /* Don't offset infinity */
- r->float_max_offset -= data.lookbehind_float;
-
- t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_float, t ? FBMcf_TAIL : 0);
- }
- else {
- remove_float:
- r->float_substr = r->float_utf8 = NULL;
- SvREFCNT_dec(data.longest_float);
- longest_float_length = 0;
- }
-
- /* Note that code very similar to this but for floating string
- is immediately above, changes may need to be made to both.
- Be careful.
- */
- longest_fixed_length = CHR_SVLEN(data.longest_fixed);
- if (longest_fixed_length
- || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- /* copy the information about the longest fixed
- from the reg_scan_data over to the program. */
- if (SvUTF8(data.longest_fixed)) {
- r->anchored_utf8 = data.longest_fixed;
- r->anchored_substr = NULL;
- } else {
- r->anchored_substr = data.longest_fixed;
- r->anchored_utf8 = NULL;
- }
- /* fixed_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_fixed ? *(data.minlen_fixed)
- : (I32)longest_fixed_length;
- r->anchored_end_shift = ml - data.offset_fixed
- - longest_fixed_length + (SvTAIL(data.longest_fixed) != 0)
- + data.lookbehind_fixed;
- r->anchored_offset = data.offset_fixed - data.lookbehind_fixed;
-
- t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_fixed, t ? FBMcf_TAIL : 0);
- }
- else {
- r->anchored_substr = r->anchored_utf8 = NULL;
- SvREFCNT_dec(data.longest_fixed);
- longest_fixed_length = 0;
- }
- if (ri->regstclass
- && (OP(ri->regstclass) == REG_ANY || OP(ri->regstclass) == SANY))
- ri->regstclass = NULL;
- if ((!(r->anchored_substr || r->anchored_utf8) || r->anchored_offset)
- && stclass_flag
- && !(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV *sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
-
- /* A temporary algorithm prefers floated substr to fixed one to dig more info. */
- if (longest_fixed_length > longest_float_length) {
- r->check_end_shift = r->anchored_end_shift;
- r->check_substr = r->anchored_substr;
- r->check_utf8 = r->anchored_utf8;
- r->check_offset_min = r->check_offset_max = r->anchored_offset;
- if (r->extflags & RXf_ANCH_SINGLE)
- r->extflags |= RXf_NOSCAN;
- }
- else {
- r->check_end_shift = r->float_end_shift;
- r->check_substr = r->float_substr;
- r->check_utf8 = r->float_utf8;
- r->check_offset_min = r->float_min_offset;
- r->check_offset_max = r->float_max_offset;
- }
- /* XXXX Currently intuiting is not compatible with ANCH_GPOS.
- This should be changed ASAP! */
- if ((r->check_substr || r->check_utf8) && !(r->extflags & RXf_ANCH_GPOS)) {
- r->extflags |= RXf_USE_INTUIT;
- if (SvTAIL(r->check_substr ? r->check_substr : r->check_utf8))
- r->extflags |= RXf_INTUIT_TAIL;
- }
- /* XXX Unneeded? dmq (shouldn't as this is handled elsewhere)
- if ( (STRLEN)minlen < longest_float_length )
- minlen= longest_float_length;
- if ( (STRLEN)minlen < longest_fixed_length )
- minlen= longest_fixed_length;
- */
- }
- else {
- /* Several toplevels. Best we can is to set minlen. */
- I32 fake;
- struct regnode_charclass_class ch_class;
- I32 last_close = 0;
-
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "\nMulti Top Level\n"));
-
- scan = ri->program + 1;
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- data.last_closep = &last_close;
-
-
- minlen = study_chunk(pRExC_state, &scan, &minlen, &fake, scan + RExC_size,
- &data, -1, NULL, NULL, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS,0);
-
- CHECK_RESTUDY_GOTO;
-
- r->check_substr = r->check_utf8 = r->anchored_substr = r->anchored_utf8
- = r->float_substr = r->float_utf8 = NULL;
- if (!(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV* sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
- }
-
- /* Guard against an embedded (?=) or (?<=) with a longer minlen than
- the "real" pattern. */
- DEBUG_OPTIMISE_r({
- PerlIO_printf(Perl_debug_log,"minlen: %"IVdf" r->minlen:%"IVdf"\n",
- (IV)minlen, (IV)r->minlen);
- });
- r->minlenret = minlen;
- if (r->minlen < minlen)
- r->minlen = minlen;
-
- if (RExC_seen & REG_SEEN_GPOS)
- r->extflags |= RXf_GPOS_SEEN;
- if (RExC_seen & REG_SEEN_LOOKBEHIND)
- r->extflags |= RXf_LOOKBEHIND_SEEN;
- if (RExC_seen & REG_SEEN_EVAL)
- r->extflags |= RXf_EVAL_SEEN;
- if (RExC_seen & REG_SEEN_CANY)
- r->extflags |= RXf_CANY_SEEN;
- if (RExC_seen & REG_SEEN_VERBARG)
- r->intflags |= PREGf_VERBARG_SEEN;
- if (RExC_seen & REG_SEEN_CUTGROUP)
- r->intflags |= PREGf_CUTGROUP_SEEN;
- if (RExC_paren_names)
- RXp_PAREN_NAMES(r) = MUTABLE_HV(SvREFCNT_inc(RExC_paren_names));
- else
- RXp_PAREN_NAMES(r) = NULL;
-
-#ifdef STUPID_PATTERN_CHECKS
- if (RX_PRELEN(rx) == 0)
- r->extflags |= RXf_NULL;
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else if (RX_PRELEN(rx) == 3 && memEQ("\\s+", RX_PRECOMP(rx), 3))
- r->extflags |= RXf_WHITE;
- else if (RX_PRELEN(rx) == 1 && RXp_PRECOMP(rx)[0] == '^')
- r->extflags |= RXf_START_ONLY;
-#else
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else {
- regnode *first = ri->program + 1;
- U8 fop = OP(first);
- U8 nop = OP(NEXTOPER(first));
-
- if (PL_regkind[fop] == NOTHING && nop == END)
- r->extflags |= RXf_NULL;
- else if (PL_regkind[fop] == BOL && nop == END)
- r->extflags |= RXf_START_ONLY;
- else if (fop == PLUS && nop ==SPACE && OP(regnext(first))==END)
- r->extflags |= RXf_WHITE;
- }
-#endif
-#ifdef DEBUGGING
- if (RExC_paren_names) {
- ri->name_list_idx = add_data( pRExC_state, 1, "p" );
- ri->data->data[ri->name_list_idx] = (void*)SvREFCNT_inc(RExC_paren_name_list);
- } else
-#endif
- ri->name_list_idx = 0;
-
- if (RExC_recurse_count) {
- for ( ; RExC_recurse_count ; RExC_recurse_count-- ) {
- const regnode *scan = RExC_recurse[RExC_recurse_count-1];
- ARG2L_SET( scan, RExC_open_parens[ARG(scan)-1] - scan );
- }
- }
- Newxz(r->offs, RExC_npar, regexp_paren_pair);
- /* assume we don't need to swap parens around before we match */
-
- DEBUG_DUMP_r({
- PerlIO_printf(Perl_debug_log,"Final program:\n");
- regdump(r);
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_OFFSETS_r(if (ri->u.offsets) {
- const U32 len = ri->u.offsets[0];
- U32 i;
- GET_RE_DEBUG_FLAGS_DECL;
- PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)ri->u.offsets[0]);
- for (i = 1; i <= len; i++) {
- if (ri->u.offsets[i*2-1] || ri->u.offsets[i*2])
- PerlIO_printf(Perl_debug_log, "%"UVuf":%"UVuf"[%"UVuf"] ",
- (UV)i, (UV)ri->u.offsets[i*2-1], (UV)ri->u.offsets[i*2]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
-#endif
- return rx;
-}
-
-#undef RE_ENGINE_PTR
-
-
-SV*
-Perl_reg_named_buff(pTHX_ REGEXP * const rx, SV * const key, SV * const value,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF;
-
- PERL_UNUSED_ARG(value);
-
- if (flags & RXapif_FETCH) {
- return reg_named_buff_fetch(rx, key, flags);
- } else if (flags & (RXapif_STORE | RXapif_DELETE | RXapif_CLEAR)) {
- Perl_croak(aTHX_ "%s", PL_no_modify);
- return NULL;
- } else if (flags & RXapif_EXISTS) {
- return reg_named_buff_exists(rx, key, flags)
- ? &PL_sv_yes
- : &PL_sv_no;
- } else if (flags & RXapif_REGNAMES) {
- return reg_named_buff_all(rx, flags);
- } else if (flags & (RXapif_SCALAR | RXapif_REGNAMES_COUNT)) {
- return reg_named_buff_scalar(rx, flags);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_iter(pTHX_ REGEXP * const rx, const SV * const lastkey,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ITER;
- PERL_UNUSED_ARG(lastkey);
-
- if (flags & RXapif_FIRSTKEY)
- return reg_named_buff_firstkey(rx, flags);
- else if (flags & RXapif_NEXTKEY)
- return reg_named_buff_nextkey(rx, flags);
- else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_iter", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_fetch(pTHX_ REGEXP * const r, SV * const namesv,
- const U32 flags)
-{
- AV *retarray = NULL;
- SV *ret;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FETCH;
-
- if (flags & RXapif_ALL)
- retarray=newAV();
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HE *he_str = hv_fetch_ent( RXp_PAREN_NAMES(rx), namesv, 0, 0 );
- if (he_str) {
- IV i;
- SV* sv_dat=HeVAL(he_str);
- I32 *nums=(I32*)SvPVX(sv_dat);
- for ( i=0; i<SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->nparens) >= nums[i]
- && rx->offs[nums[i]].start != -1
- && rx->offs[nums[i]].end != -1)
- {
- ret = newSVpvs("");
- CALLREG_NUMBUF_FETCH(r,nums[i],ret);
- if (!retarray)
- return ret;
- } else {
- ret = newSVsv(&PL_sv_undef);
- }
- if (retarray)
- av_push(retarray, ret);
- }
- if (retarray)
- return newRV_noinc(MUTABLE_SV(retarray));
- }
- }
- return NULL;
-}
-
-bool
-Perl_reg_named_buff_exists(pTHX_ REGEXP * const r, SV * const key,
- const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_EXISTS;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & RXapif_ALL) {
- return hv_exists_ent(RXp_PAREN_NAMES(rx), key, 0);
- } else {
- SV *sv = CALLREG_NAMED_BUFF_FETCH(r, key, flags);
- if (sv) {
- SvREFCNT_dec(sv);
- return TRUE;
- } else {
- return FALSE;
- }
- }
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_firstkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FIRSTKEY;
-
- if ( rx && RXp_PAREN_NAMES(rx) ) {
- (void)hv_iterinit(RXp_PAREN_NAMES(rx));
-
- return CALLREG_NAMED_BUFF_NEXTKEY(r, NULL, flags & ~RXapif_FIRSTKEY);
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_nextkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_NEXTKEY;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv = RXp_PAREN_NAMES(rx);
- HE *temphe;
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- return newSVhek(HeKEY_hek(temphe));
- }
- }
- }
- return NULL;
-}
-
-SV*
-Perl_reg_named_buff_scalar(pTHX_ REGEXP * const r, const U32 flags)
-{
- SV *ret;
- AV *av;
- I32 length;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_SCALAR;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & (RXapif_ALL | RXapif_REGNAMES_COUNT)) {
- return newSViv(HvTOTALKEYS(RXp_PAREN_NAMES(rx)));
- } else if (flags & RXapif_ONE) {
- ret = CALLREG_NAMED_BUFF_ALL(r, (flags | RXapif_REGNAMES));
- av = MUTABLE_AV(SvRV(ret));
- length = av_len(av);
- SvREFCNT_dec(ret);
- return newSViv(length + 1);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_scalar", (int)flags);
- return NULL;
- }
- }
- return &PL_sv_undef;
-}
-
-SV*
-Perl_reg_named_buff_all(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- AV *av = newAV();
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ALL;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv= RXp_PAREN_NAMES(rx);
- HE *temphe;
- (void)hv_iterinit(hv);
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- av_push(av, newSVhek(HeKEY_hek(temphe)));
- }
- }
- }
-
- return newRV_noinc(MUTABLE_SV(av));
-}
-
-void
-Perl_reg_numbered_buff_fetch(pTHX_ REGEXP * const r, const I32 paren,
- SV * const sv)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- char *s = NULL;
- I32 i = 0;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_FETCH;
-
- if (!rx->subbeg) {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- else
- if (paren == RX_BUFF_IDX_PREMATCH && rx->offs[0].start != -1) {
- /* $` */
- i = rx->offs[0].start;
- s = rx->subbeg;
- }
- else
- if (paren == RX_BUFF_IDX_POSTMATCH && rx->offs[0].end != -1) {
- /* $' */
- s = rx->subbeg + rx->offs[0].end;
- i = rx->sublen - rx->offs[0].end;
- }
- else
- if ( 0 <= paren && paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- /* $& $1 ... */
- i = t1 - s1;
- s = rx->subbeg + s1;
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- assert(rx->sublen >= (s - rx->subbeg) + i );
- if (i >= 0) {
- const int oldtainted = PL_tainted;
- TAINT_NOT;
- sv_setpvn(sv, s, i);
- PL_tainted = oldtainted;
- if ( (rx->extflags & RXf_CANY_SEEN)
- ? (RXp_MATCH_UTF8(rx)
- && (!i || is_utf8_string((U8*)s, i)))
- : (RXp_MATCH_UTF8(rx)) )
- {
- SvUTF8_on(sv);
- }
- else
- SvUTF8_off(sv);
- if (PL_tainting) {
- if (RXp_MATCH_TAINTED(rx)) {
- if (SvTYPE(sv) >= SVt_PVMG) {
- MAGIC* const mg = SvMAGIC(sv);
- MAGIC* mgt;
- PL_tainted = 1;
- SvMAGIC_set(sv, mg->mg_moremagic);
- SvTAINT(sv);
- if ((mgt = SvMAGIC(sv))) {
- mg->mg_moremagic = mgt;
- SvMAGIC_set(sv, mg);
- }
- } else {
- PL_tainted = 1;
- SvTAINT(sv);
- }
- } else
- SvTAINTED_off(sv);
- }
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
-}
-
-void
-Perl_reg_numbered_buff_store(pTHX_ REGEXP * const rx, const I32 paren,
- SV const * const value)
-{
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_STORE;
-
- PERL_UNUSED_ARG(rx);
- PERL_UNUSED_ARG(paren);
- PERL_UNUSED_ARG(value);
-
- if (!PL_localizing)
- Perl_croak(aTHX_ "%s", PL_no_modify);
-}
-
-I32
-Perl_reg_numbered_buff_length(pTHX_ REGEXP * const r, const SV * const sv,
- const I32 paren)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- I32 i;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_LENGTH;
-
- /* Some of this code was originally in C<Perl_magic_len> in F<mg.c> */
- switch (paren) {
- /* $` / ${^PREMATCH} */
- case RX_BUFF_IDX_PREMATCH:
- if (rx->offs[0].start != -1) {
- i = rx->offs[0].start;
- if (i > 0) {
- s1 = 0;
- t1 = i;
- goto getlen;
- }
- }
- return 0;
- /* $' / ${^POSTMATCH} */
- case RX_BUFF_IDX_POSTMATCH:
- if (rx->offs[0].end != -1) {
- i = rx->sublen - rx->offs[0].end;
- if (i > 0) {
- s1 = rx->offs[0].end;
- t1 = rx->sublen;
- goto getlen;
- }
- }
- return 0;
- /* $& / ${^MATCH}, $1, $2, ... */
- default:
- if (paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- i = t1 - s1;
- goto getlen;
- } else {
- if (ckWARN(WARN_UNINITIALIZED))
- report_uninit((const SV *)sv);
- return 0;
- }
- }
- getlen:
- if (i > 0 && RXp_MATCH_UTF8(rx)) {
- const char * const s = rx->subbeg + s1;
- const U8 *ep;
- STRLEN el;
-
- i = t1 - s1;
- if (is_utf8_string_loclen((U8*)s, i, &ep, &el))
- i = el;
- }
- return i;
-}
-
-SV*
-Perl_reg_qr_package(pTHX_ REGEXP * const rx)
-{
- PERL_ARGS_ASSERT_REG_QR_PACKAGE;
- PERL_UNUSED_ARG(rx);
- if (0)
- return NULL;
- else
- return newSVpvs("Regexp");
-}
-
-/* Scans the name of a named buffer from the pattern.
- * If flags is REG_RSN_RETURN_NULL returns null.
- * If flags is REG_RSN_RETURN_NAME returns an SV* containing the name
- * If flags is REG_RSN_RETURN_DATA returns the data SV* corresponding
- * to the parsed name as looked up in the RExC_paren_names hash.
- * If there is an error throws a vFAIL().. type exception.
- */
-
-#define REG_RSN_RETURN_NULL 0
-#define REG_RSN_RETURN_NAME 1
-#define REG_RSN_RETURN_DATA 2
-
-STATIC SV*
-S_reg_scan_name(pTHX_ RExC_state_t *pRExC_state, U32 flags)
-{
- char *name_start = RExC_parse;
-
- PERL_ARGS_ASSERT_REG_SCAN_NAME;
-
- if (isIDFIRST_lazy_if(RExC_parse, UTF)) {
- /* skip IDFIRST by using do...while */
- if (UTF)
- do {
- RExC_parse += UTF8SKIP(RExC_parse);
- } while (isALNUM_utf8((U8*)RExC_parse));
- else
- do {
- RExC_parse++;
- } while (isALNUM(*RExC_parse));
- }
-
- if ( flags ) {
- SV* sv_name
- = newSVpvn_flags(name_start, (int)(RExC_parse - name_start),
- SVs_TEMP | (UTF ? SVf_UTF8 : 0));
- if ( flags == REG_RSN_RETURN_NAME)
- return sv_name;
- else if (flags==REG_RSN_RETURN_DATA) {
- HE *he_str = NULL;
- SV *sv_dat = NULL;
- if ( ! sv_name ) /* should not happen*/
- Perl_croak(aTHX_ "panic: no svname in reg_scan_name");
- if (RExC_paren_names)
- he_str = hv_fetch_ent( RExC_paren_names, sv_name, 0, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat )
- vFAIL("Reference to nonexistent named group");
- return sv_dat;
- }
- else {
- Perl_croak(aTHX_ "panic: bad flag in reg_scan_name");
- }
- /* NOT REACHED */
- }
- return NULL;
-}
-
-#define DEBUG_PARSE_MSG(funcname) DEBUG_PARSE_r({ \
- int rem=(int)(RExC_end - RExC_parse); \
- int cut; \
- int num; \
- int iscut=0; \
- if (rem>10) { \
- rem=10; \
- iscut=1; \
- } \
- cut=10-rem; \
- if (RExC_lastparse!=RExC_parse) \
- PerlIO_printf(Perl_debug_log," >%.*s%-*s", \
- rem, RExC_parse, \
- cut + 4, \
- iscut ? "..." : "<" \
- ); \
- else \
- PerlIO_printf(Perl_debug_log,"%16s",""); \
- \
- if (SIZE_ONLY) \
- num = RExC_size + 1; \
- else \
- num=REG_NODE_NUM(RExC_emit); \
- if (RExC_lastnum!=num) \
- PerlIO_printf(Perl_debug_log,"|%4d",num); \
- else \
- PerlIO_printf(Perl_debug_log,"|%4s",""); \
- PerlIO_printf(Perl_debug_log,"|%*s%-4s", \
- (int)((depth*2)), "", \
- (funcname) \
- ); \
- RExC_lastnum=num; \
- RExC_lastparse=RExC_parse; \
-})
-
-
-
-#define DEBUG_PARSE(funcname) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,"%4s","\n"); \
-})
-#define DEBUG_PARSE_FMT(funcname,fmt,args) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,fmt "\n",args); \
-})
-/*
- - reg - regular expression, i.e. main body or parenthesized thing
- *
- * Caller must absorb opening parenthesis.
- *
- * Combining parenthesis handling with the base level of regular expression
- * is a trifle forced, but the need to tie the tails of the branches to what
- * follows makes it hard to avoid.
- */
-#define REGTAIL(x,y,z) regtail((x),(y),(z),depth+1)
-#ifdef DEBUGGING
-#define REGTAIL_STUDY(x,y,z) regtail_study((x),(y),(z),depth+1)
-#else
-#define REGTAIL_STUDY(x,y,z) regtail((x),(y),(z),depth+1)
-#endif
-
-STATIC regnode *
-S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth)
- /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */
-{
- dVAR;
- register regnode *ret; /* Will be the head of the group. */
- register regnode *br;
- register regnode *lastbr;
- register regnode *ender = NULL;
- register I32 parno = 0;
- I32 flags;
- U32 oregflags = RExC_flags;
- bool have_branch = 0;
- bool is_open = 0;
- I32 freeze_paren = 0;
- I32 after_freeze = 0;
-
- /* for (?g), (?gc), and (?o) warnings; warning
- about (?c) will warn about (?g) -- japhy */
-
-#define WASTED_O 0x01
-#define WASTED_G 0x02
-#define WASTED_C 0x04
-#define WASTED_GC (0x02|0x04)
- I32 wastedflags = 0x00;
-
- char * parse_start = RExC_parse; /* MJD */
- char * const oregcomp_parse = RExC_parse;
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG;
- DEBUG_PARSE("reg ");
-
- *flagp = 0; /* Tentatively. */
-
-
- /* Make an OPEN node, if parenthesized. */
- if (paren) {
- if ( *RExC_parse == '*') { /* (*VERB:ARG) */
- char *start_verb = RExC_parse;
- STRLEN verb_len = 0;
- char *start_arg = NULL;
- unsigned char op = 0;
- int argok = 1;
- int internal_argval = 0; /* internal_argval is only useful if !argok */
- while ( *RExC_parse && *RExC_parse != ')' ) {
- if ( *RExC_parse == ':' ) {
- start_arg = RExC_parse + 1;
- break;
- }
- RExC_parse++;
- }
- ++start_verb;
- verb_len = RExC_parse - start_verb;
- if ( start_arg ) {
- RExC_parse++;
- while ( *RExC_parse && *RExC_parse != ')' )
- RExC_parse++;
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern argument");
- if ( RExC_parse == start_arg )
- start_arg = NULL;
- } else {
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern");
- }
-
- switch ( *start_verb ) {
- case 'A': /* (*ACCEPT) */
- if ( memEQs(start_verb,verb_len,"ACCEPT") ) {
- op = ACCEPT;
- internal_argval = RExC_nestroot;
- }
- break;
- case 'C': /* (*COMMIT) */
- if ( memEQs(start_verb,verb_len,"COMMIT") )
- op = COMMIT;
- break;
- case 'F': /* (*FAIL) */
- if ( verb_len==1 || memEQs(start_verb,verb_len,"FAIL") ) {
- op = OPFAIL;
- argok = 0;
- }
- break;
- case ':': /* (*:NAME) */
- case 'M': /* (*MARK:NAME) */
- if ( verb_len==0 || memEQs(start_verb,verb_len,"MARK") ) {
- op = MARKPOINT;
- argok = -1;
- }
- break;
- case 'P': /* (*PRUNE) */
- if ( memEQs(start_verb,verb_len,"PRUNE") )
- op = PRUNE;
- break;
- case 'S': /* (*SKIP) */
- if ( memEQs(start_verb,verb_len,"SKIP") )
- op = SKIP;
- break;
- case 'T': /* (*THEN) */
- /* [19:06] <TimToady> :: is then */
- if ( memEQs(start_verb,verb_len,"THEN") ) {
- op = CUTGROUP;
- RExC_seen |= REG_SEEN_CUTGROUP;
- }
- break;
- }
- if ( ! op ) {
- RExC_parse++;
- vFAIL3("Unknown verb pattern '%.*s'",
- verb_len, start_verb);
- }
- if ( argok ) {
- if ( start_arg && internal_argval ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else if ( argok < 0 && !start_arg ) {
- vFAIL3("Verb pattern '%.*s' has a mandatory argument",
- verb_len, start_verb);
- } else {
- ret = reganode(pRExC_state, op, internal_argval);
- if ( ! internal_argval && ! SIZE_ONLY ) {
- if (start_arg) {
- SV *sv = newSVpvn( start_arg, RExC_parse - start_arg);
- ARG(ret) = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[ARG(ret)]=(void*)sv;
- ret->flags = 0;
- } else {
- ret->flags = 1;
- }
- }
- }
- if (!internal_argval)
- RExC_seen |= REG_SEEN_VERBARG;
- } else if ( start_arg ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else {
- ret = reg_node(pRExC_state, op);
- }
- nextchar(pRExC_state);
- return ret;
- } else
- if (*RExC_parse == '?') { /* (?...) */
- bool is_logical = 0;
- const char * const seqstart = RExC_parse;
-
- RExC_parse++;
- paren = *RExC_parse++;
- ret = NULL; /* For look-ahead/behind. */
- switch (paren) {
-
- case 'P': /* (?P...) variants for those used to PCRE/Python */
- paren = *RExC_parse++;
- if ( paren == '<') /* (?P<...>) named capture */
- goto named_capture;
- else if (paren == '>') { /* (?P>name) named recursion */
- goto named_recursion;
- }
- else if (paren == '=') { /* (?P=...) named backref */
- /* this pretty much dupes the code for \k<NAME> in regatom(), if
- you change this make sure you change that */
- char* name_start = RExC_parse;
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ')')
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
-
- nextchar(pRExC_state);
- return ret;
- }
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- case '<': /* (?<...) */
- if (*RExC_parse == '!')
- paren = ',';
- else if (*RExC_parse != '=')
- named_capture:
- { /* (?<...>) */
- char *name_start;
- SV *svname;
- paren= '>';
- case '\'': /* (?'...') */
- name_start= RExC_parse;
- svname = reg_scan_name(pRExC_state,
- SIZE_ONLY ? /* reverse test from the others */
- REG_RSN_RETURN_NAME :
- REG_RSN_RETURN_NULL);
- if (RExC_parse == name_start) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- if (*RExC_parse != paren)
- vFAIL2("Sequence (?%c... not terminated",
- paren=='>' ? '<' : paren);
- if (SIZE_ONLY) {
- HE *he_str;
- SV *sv_dat = NULL;
- if (!svname) /* shouldnt happen */
- Perl_croak(aTHX_
- "panic: reg_scan_name returned NULL");
- if (!RExC_paren_names) {
- RExC_paren_names= newHV();
- sv_2mortal(MUTABLE_SV(RExC_paren_names));
-#ifdef DEBUGGING
- RExC_paren_name_list= newAV();
- sv_2mortal(MUTABLE_SV(RExC_paren_name_list));
-#endif
- }
- he_str = hv_fetch_ent( RExC_paren_names, svname, 1, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat ) {
- /* croak baby croak */
- Perl_croak(aTHX_
- "panic: paren_name hash element allocation failed");
- } else if ( SvPOK(sv_dat) ) {
- /* (?|...) can mean we have dupes so scan to check
- its already been stored. Maybe a flag indicating
- we are inside such a construct would be useful,
- but the arrays are likely to be quite small, so
- for now we punt -- dmq */
- IV count = SvIV(sv_dat);
- I32 *pv = (I32*)SvPVX(sv_dat);
- IV i;
- for ( i = 0 ; i < count ; i++ ) {
- if ( pv[i] == RExC_npar ) {
- count = 0;
- break;
- }
- }
- if ( count ) {
- pv = (I32*)SvGROW(sv_dat, SvCUR(sv_dat) + sizeof(I32)+1);
- SvCUR_set(sv_dat, SvCUR(sv_dat) + sizeof(I32));
- pv[count] = RExC_npar;
- SvIV_set(sv_dat, SvIVX(sv_dat) + 1);
- }
- } else {
- (void)SvUPGRADE(sv_dat,SVt_PVNV);
- sv_setpvn(sv_dat, (char *)&(RExC_npar), sizeof(I32));
- SvIOK_on(sv_dat);
- SvIV_set(sv_dat, 1);
- }
-#ifdef DEBUGGING
- if (!av_store(RExC_paren_name_list, RExC_npar, SvREFCNT_inc(svname)))
- SvREFCNT_dec(svname);
-#endif
-
- /*sv_dump(sv_dat);*/
- }
- nextchar(pRExC_state);
- paren = 1;
- goto capturing_parens;
- }
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- RExC_parse++;
- case '=': /* (?=...) */
- RExC_seen_zerolen++;
- break;
- case '!': /* (?!...) */
- RExC_seen_zerolen++;
- if (*RExC_parse == ')') {
- ret=reg_node(pRExC_state, OPFAIL);
- nextchar(pRExC_state);
- return ret;
- }
- break;
- case '|': /* (?|...) */
- /* branch reset, behave like a (?:...) except that
- buffers in alternations share the same numbers */
- paren = ':';
- after_freeze = freeze_paren = RExC_npar;
- break;
- case ':': /* (?:...) */
- case '>': /* (?>...) */
- break;
- case '$': /* (?$...) */
- case '@': /* (?@...) */
- vFAIL2("Sequence (?%c...) not implemented", (int)paren);
- break;
- case '#': /* (?#...) */
- while (*RExC_parse && *RExC_parse != ')')
- RExC_parse++;
- if (*RExC_parse != ')')
- FAIL("Sequence (?#... not terminated");
- nextchar(pRExC_state);
- *flagp = TRYAGAIN;
- return NULL;
- case '0' : /* (?0) */
- case 'R' : /* (?R) */
- if (*RExC_parse != ')')
- FAIL("Sequence (?R) not terminated");
- ret = reg_node(pRExC_state, GOSTART);
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- /*notreached*/
- { /* named and numeric backreferences */
- I32 num;
- case '&': /* (?&NAME) */
- parse_start = RExC_parse - 1;
- named_recursion:
- {
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- num = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- goto gen_recurse_regop;
- /* NOT REACHED */
- case '+':
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse++;
- vFAIL("Illegal pattern");
- }
- goto parse_recursion;
- /* NOT REACHED*/
- case '-': /* (?-1) */
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse--; /* rewind to let it be handled later */
- goto parse_flags;
- }
- /*FALLTHROUGH */
- case '1': case '2': case '3': case '4': /* (?1) */
- case '5': case '6': case '7': case '8': case '9':
- RExC_parse--;
- parse_recursion:
- num = atoi(RExC_parse);
- parse_start = RExC_parse - 1; /* MJD */
- if (*RExC_parse == '-')
- RExC_parse++;
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (*RExC_parse!=')')
- vFAIL("Expecting close bracket");
-
- gen_recurse_regop:
- if ( paren == '-' ) {
- /*
- Diagram of capture buffer numbering.
- Top line is the normal capture buffer numbers
- Botton line is the negative indexing as from
- the X (the (?-2))
-
- + 1 2 3 4 5 X 6 7
- /(a(x)y)(a(b(c(?-2)d)e)f)(g(h))/
- - 5 4 3 2 1 X x x
-
- */
- num = RExC_npar + num;
- if (num < 1) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- } else if ( paren == '+' ) {
- num = RExC_npar + num - 1;
- }
-
- ret = reganode(pRExC_state, GOSUB, num);
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- ARG2L_SET( ret, RExC_recurse_count++);
- RExC_emit++;
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Recurse #%"UVuf" to %"IVdf"\n", (UV)ARG(ret), (IV)ARG2L(ret)));
- } else {
- RExC_size++;
- }
- RExC_seen |= REG_SEEN_RECURSE;
- Set_Node_Length(ret, 1 + regarglen[OP(ret)]); /* MJD */
- Set_Node_Offset(ret, parse_start); /* MJD */
-
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- } /* named and numeric backreferences */
- /* NOT REACHED */
-
- case '?': /* (??...) */
- is_logical = 1;
- if (*RExC_parse != '{') {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- *flagp |= POSTPONED;
- paren = *RExC_parse++;
- /* FALL THROUGH */
- case '{': /* (?{...}) */
- {
- I32 count = 1;
- U32 n = 0;
- char c;
- char *s = RExC_parse;
-
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_EVAL;
- while (count && (c = *RExC_parse)) {
- if (c == '\\') {
- if (RExC_parse[1])
- RExC_parse++;
- }
- else if (c == '{')
- count++;
- else if (c == '}')
- count--;
- RExC_parse++;
- }
- if (*RExC_parse != ')') {
- RExC_parse = s;
- vFAIL("Sequence (?{...}) not terminated or not {}-balanced");
- }
- if (!SIZE_ONLY) {
- PAD *pad;
- OP_4tree *sop, *rop;
- SV * const sv = newSVpvn(s, RExC_parse - 1 - s);
-
- ENTER;
- Perl_save_re_context(aTHX);
- rop = sv_compile_2op(sv, &sop, "re", &pad);
- sop->op_private |= OPpREFCOUNTED;
- /* re_dup will OpREFCNT_inc */
- OpREFCNT_set(sop, 1);
- LEAVE;
-
- n = add_data(pRExC_state, 3, "nop");
- RExC_rxi->data->data[n] = (void*)rop;
- RExC_rxi->data->data[n+1] = (void*)sop;
- RExC_rxi->data->data[n+2] = (void*)pad;
- SvREFCNT_dec(sv);
- }
- else { /* First pass */
- if (PL_reginterp_cnt < ++RExC_seen_evals
- && IN_PERL_RUNTIME)
- /* No compiled RE interpolated, has runtime
- components ===> unsafe. */
- FAIL("Eval-group not allowed at runtime, use re 'eval'");
- if (PL_tainting && PL_tainted)
- FAIL("Eval-group in insecure regular expression");
-#if PERL_VERSION > 8
- if (IN_PERL_COMPILETIME)
- PL_cv_has_eval = 1;
-#endif
- }
-
- nextchar(pRExC_state);
- if (is_logical) {
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 2;
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, EVAL, n));
- /* deal with the length of this later - MJD */
- return ret;
- }
- ret = reganode(pRExC_state, EVAL, n);
- Set_Node_Length(ret, RExC_parse - parse_start + 1);
- Set_Node_Offset(ret, parse_start);
- return ret;
- }
- case '(': /* (?(?{...})...) and (?(?=...)...) */
- {
- int is_define= 0;
- if (RExC_parse[0] == '?') { /* (?(?...)) */
- if (RExC_parse[1] == '=' || RExC_parse[1] == '!'
- || RExC_parse[1] == '<'
- || RExC_parse[1] == '{') { /* Lookahead or eval. */
- I32 flag;
-
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 1;
- REGTAIL(pRExC_state, ret, reg(pRExC_state, 1, &flag,depth+1));
- goto insert_if;
- }
- }
- else if ( RExC_parse[0] == '<' /* (?(<NAME>)...) */
- || RExC_parse[0] == '\'' ) /* (?('NAME')...) */
- {
- char ch = RExC_parse[0] == '<' ? '>' : '\'';
- char *name_start= RExC_parse++;
- U32 num = 0;
- SV *sv_dat=reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence (?(%c... not terminated",
- (ch == '>' ? '<' : ch));
- RExC_parse++;
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- ret = reganode(pRExC_state,NGROUPP,num);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'D' &&
- RExC_parse[1] == 'E' &&
- RExC_parse[2] == 'F' &&
- RExC_parse[3] == 'I' &&
- RExC_parse[4] == 'N' &&
- RExC_parse[5] == 'E')
- {
- ret = reganode(pRExC_state,DEFINEP,0);
- RExC_parse +=6 ;
- is_define = 1;
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'R') {
- RExC_parse++;
- parno = 0;
- if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- parno = atoi(RExC_parse++);
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- } else if (RExC_parse[0] == '&') {
- SV *sv_dat;
- RExC_parse++;
- sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- parno = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- ret = reganode(pRExC_state,INSUBP,parno);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- /* (?(1)...) */
- char c;
- parno = atoi(RExC_parse++);
-
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- ret = reganode(pRExC_state, GROUPP, parno);
-
- insert_if_check_paren:
- if ((c = *nextchar(pRExC_state)) != ')')
- vFAIL("Switch condition not recognized");
- insert_if:
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0));
- br = regbranch(pRExC_state, &flags, 1,depth+1);
- if (br == NULL)
- br = reganode(pRExC_state, LONGJMP, 0);
- else
- REGTAIL(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0));
- c = *nextchar(pRExC_state);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- if (c == '|') {
- if (is_define)
- vFAIL("(?(DEFINE)....) does not allow branches");
- lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */
- regbranch(pRExC_state, &flags, 1,depth+1);
- REGTAIL(pRExC_state, ret, lastbr);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- c = *nextchar(pRExC_state);
- }
- else
- lastbr = NULL;
- if (c != ')')
- vFAIL("Switch (?(condition)... contains too many branches");
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, br, ender);
- if (lastbr) {
- REGTAIL(pRExC_state, lastbr, ender);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender);
- }
- else
- REGTAIL(pRExC_state, ret, ender);
- RExC_size++; /* XXX WHY do we need this?!!
- For large programs it seems to be required
- but I can't figure out why. -- dmq*/
- return ret;
- }
- else {
- vFAIL2("Unknown switch condition (?(%.2s", RExC_parse);
- }
- }
- case 0:
- RExC_parse--; /* for vFAIL to print correctly */
- vFAIL("Sequence (? incomplete");
- break;
- default:
- --RExC_parse;
- parse_flags: /* (?i) */
- {
- U32 posflags = 0, negflags = 0;
- U32 *flagsp = &posflags;
-
- while (*RExC_parse) {
- /* && strchr("iogcmsx", *RExC_parse) */
- /* (?g), (?gc) and (?o) are useless here
- and must be globally applied -- japhy */
- switch (*RExC_parse) {
- CASE_STD_PMMOD_FLAGS_PARSE_SET(flagsp);
- case ONCE_PAT_MOD: /* 'o' */
- case GLOBAL_PAT_MOD: /* 'g' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- const I32 wflagbit = *RExC_parse == 'o' ? WASTED_O : WASTED_G;
- if (! (wastedflags & wflagbit) ) {
- wastedflags |= wflagbit;
- vWARN5(
- RExC_parse + 1,
- "Useless (%s%c) - %suse /%c modifier",
- flagsp == &negflags ? "?-" : "?",
- *RExC_parse,
- flagsp == &negflags ? "don't " : "",
- *RExC_parse
- );
- }
- }
- break;
-
- case CONTINUE_PAT_MOD: /* 'c' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- if (! (wastedflags & WASTED_C) ) {
- wastedflags |= WASTED_GC;
- vWARN3(
- RExC_parse + 1,
- "Useless (%sc) - %suse /gc modifier",
- flagsp == &negflags ? "?-" : "?",
- flagsp == &negflags ? "don't " : ""
- );
- }
- }
- break;
- case KEEPCOPY_PAT_MOD: /* 'p' */
- if (flagsp == &negflags) {
- if (SIZE_ONLY)
- ckWARNreg(RExC_parse + 1,"Useless use of (?-p)");
- } else {
- *flagsp |= RXf_PMf_KEEPCOPY;
- }
- break;
- case '-':
- if (flagsp == &negflags) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- flagsp = &negflags;
- wastedflags = 0; /* reset so (?g-c) warns twice */
- break;
- case ':':
- paren = ':';
- /*FALLTHROUGH*/
- case ')':
- RExC_flags |= posflags;
- RExC_flags &= ~negflags;
- if (paren != ':') {
- oregflags |= posflags;
- oregflags &= ~negflags;
- }
- nextchar(pRExC_state);
- if (paren != ':') {
- *flagp = TRYAGAIN;
- return NULL;
- } else {
- ret = NULL;
- goto parse_rest;
- }
- /*NOTREACHED*/
- default:
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- ++RExC_parse;
- }
- }} /* one for the default block, one for the switch */
- }
- else { /* (...) */
- capturing_parens:
- parno = RExC_npar;
- RExC_npar++;
-
- ret = reganode(pRExC_state, OPEN, parno);
- if (!SIZE_ONLY ){
- if (!RExC_nestroot)
- RExC_nestroot = parno;
- if (RExC_seen & REG_SEEN_RECURSE
- && !RExC_open_parens[parno-1])
- {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting open paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ret)));
- RExC_open_parens[parno-1]= ret;
- }
- }
- Set_Node_Length(ret, 1); /* MJD */
- Set_Node_Offset(ret, RExC_parse); /* MJD */
- is_open = 1;
- }
- }
- else /* ! paren */
- ret = NULL;
-
- parse_rest:
- /* Pick up the branches, linking them together. */
- parse_start = RExC_parse; /* MJD */
- br = regbranch(pRExC_state, &flags, 1,depth+1);
-
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
-
- /* branch_len = (paren != 0); */
-
- if (br == NULL)
- return(NULL);
- if (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, BRANCHJ, br, depth+1);
- }
- else { /* MJD */
- reginsert(pRExC_state, BRANCH, br, depth+1);
- Set_Node_Length(br, paren != 0);
- Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start);
- }
- have_branch = 1;
- if (SIZE_ONLY)
- RExC_extralen += 1; /* For BRANCHJ-BRANCH. */
- }
- else if (paren == ':') {
- *flagp |= flags&SIMPLE;
- }
- if (is_open) { /* Starts with OPEN. */
- REGTAIL(pRExC_state, ret, br); /* OPEN -> first. */
- }
- else if (paren != '?') /* Not Conditional */
- ret = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- lastbr = br;
- while (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- ender = reganode(pRExC_state, LONGJMP,0);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */
- }
- if (SIZE_ONLY)
- RExC_extralen += 2; /* Account for LONGJMP. */
- nextchar(pRExC_state);
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
- br = regbranch(pRExC_state, &flags, 0, depth+1);
-
- if (br == NULL)
- return(NULL);
- REGTAIL(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */
- lastbr = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- }
-
- if (have_branch || paren != ':') {
- /* Make a closing node, and hook it on the end. */
- switch (paren) {
- case ':':
- ender = reg_node(pRExC_state, TAIL);
- break;
- case 1:
- ender = reganode(pRExC_state, CLOSE, parno);
- if (!SIZE_ONLY && RExC_seen & REG_SEEN_RECURSE) {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting close paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ender)));
- RExC_close_parens[parno-1]= ender;
- if (RExC_nestroot == parno)
- RExC_nestroot = 0;
- }
- Set_Node_Offset(ender,RExC_parse+1); /* MJD */
- Set_Node_Length(ender,1); /* MJD */
- break;
- case '<':
- case ',':
- case '=':
- case '!':
- *flagp &= ~HASWIDTH;
- /* FALL THROUGH */
- case '>':
- ender = reg_node(pRExC_state, SUCCEED);
- break;
- case 0:
- ender = reg_node(pRExC_state, END);
- if (!SIZE_ONLY) {
- assert(!RExC_opend); /* there can only be one! */
- RExC_opend = ender;
- }
- break;
- }
- REGTAIL(pRExC_state, lastbr, ender);
-
- if (have_branch && !SIZE_ONLY) {
- if (depth==1)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
-
- /* Hook the tails of the branches to the closing node. */
- for (br = ret; br; br = regnext(br)) {
- const U8 op = PL_regkind[OP(br)];
- if (op == BRANCH) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(br), ender);
- }
- else if (op == BRANCHJ) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(NEXTOPER(br)), ender);
- }
- }
- }
- }
-
- {
- const char *p;
- static const char parens[] = "=!<,>";
-
- if (paren && (p = strchr(parens, paren))) {
- U8 node = ((p - parens) % 2) ? UNLESSM : IFMATCH;
- int flag = (p - parens) > 1;
-
- if (paren == '>')
- node = SUSPEND, flag = 0;
- reginsert(pRExC_state, node,ret, depth+1);
- Set_Node_Cur_Length(ret);
- Set_Node_Offset(ret, parse_start + 1);
- ret->flags = flag;
- REGTAIL_STUDY(pRExC_state, ret, reg_node(pRExC_state, TAIL));
- }
- }
-
- /* Check for proper termination. */
- if (paren) {
- RExC_flags = oregflags;
- if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched (");
- }
- }
- else if (!paren && RExC_parse < RExC_end) {
- if (*RExC_parse == ')') {
- RExC_parse++;
- vFAIL("Unmatched )");
- }
- else
- FAIL("Junk on end of regexp"); /* "Can't happen". */
- /* NOTREACHED */
- }
- if (after_freeze)
- RExC_npar = after_freeze;
- return(ret);
-}
-
-/*
- - regbranch - one alternative of an | operator
- *
- * Implements the concatenation operator.
- */
-STATIC regnode *
-S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register regnode *chain = NULL;
- register regnode *latest;
- I32 flags = 0, c = 0;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGBRANCH;
-
- DEBUG_PARSE("brnc");
-
- if (first)
- ret = NULL;
- else {
- if (!SIZE_ONLY && RExC_extralen)
- ret = reganode(pRExC_state, BRANCHJ,0);
- else {
- ret = reg_node(pRExC_state, BRANCH);
- Set_Node_Length(ret, 1);
- }
- }
-
- if (!first && SIZE_ONLY)
- RExC_extralen += 1; /* BRANCHJ */
-
- *flagp = WORST; /* Tentatively. */
-
- RExC_parse--;
- nextchar(pRExC_state);
- while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') {
- flags &= ~TRYAGAIN;
- latest = regpiece(pRExC_state, &flags,depth+1);
- if (latest == NULL) {
- if (flags & TRYAGAIN)
- continue;
- return(NULL);
- }
- else if (ret == NULL)
- ret = latest;
- *flagp |= flags&(HASWIDTH|POSTPONED);
- if (chain == NULL) /* First piece. */
- *flagp |= flags&SPSTART;
- else {
- RExC_naughty++;
- REGTAIL(pRExC_state, chain, latest);
- }
- chain = latest;
- c++;
- }
- if (chain == NULL) { /* Loop ran zero times. */
- chain = reg_node(pRExC_state, NOTHING);
- if (ret == NULL)
- ret = chain;
- }
- if (c == 1) {
- *flagp |= flags&SIMPLE;
- }
-
- return ret;
-}
-
-/*
- - regpiece - something followed by possible [*+?]
- *
- * Note that the branching code sequences used for ? and the general cases
- * of * and + are somewhat optimized: they use the same NOTHING node as
- * both the endmarker for their branch list and the body of the last branch.
- * It might seem that this node could be dispensed with entirely, but the
- * endmarker role is not redundant.
- */
-STATIC regnode *
-S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register char op;
- register char *next;
- I32 flags;
- const char * const origparse = RExC_parse;
- I32 min;
- I32 max = REG_INFTY;
- char *parse_start;
- const char *maxpos = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPIECE;
-
- DEBUG_PARSE("piec");
-
- ret = regatom(pRExC_state, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN)
- *flagp |= TRYAGAIN;
- return(NULL);
- }
-
- op = *RExC_parse;
-
- if (op == '{' && regcurly(RExC_parse)) {
- maxpos = NULL;
- parse_start = RExC_parse; /* MJD */
- next = RExC_parse + 1;
- while (isDIGIT(*next) || *next == ',') {
- if (*next == ',') {
- if (maxpos)
- break;
- else
- maxpos = next;
- }
- next++;
- }
- if (*next == '}') { /* got one */
- if (!maxpos)
- maxpos = next;
- RExC_parse++;
- min = atoi(RExC_parse);
- if (*maxpos == ',')
- maxpos++;
- else
- maxpos = RExC_parse;
- max = atoi(maxpos);
- if (!max && *maxpos != '0')
- max = REG_INFTY; /* meaning "infinity" */
- else if (max >= REG_INFTY)
- vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1);
- RExC_parse = next;
- nextchar(pRExC_state);
-
- do_curly:
- if ((flags&SIMPLE)) {
- RExC_naughty += 2 + RExC_naughty / 2;
- reginsert(pRExC_state, CURLY, ret, depth+1);
- Set_Node_Offset(ret, parse_start+1); /* MJD */
- Set_Node_Cur_Length(ret);
- }
- else {
- regnode * const w = reg_node(pRExC_state, WHILEM);
-
- w->flags = 0;
- REGTAIL(pRExC_state, ret, w);
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, LONGJMP,ret, depth+1);
- reginsert(pRExC_state, NOTHING,ret, depth+1);
- NEXT_OFF(ret) = 3; /* Go over LONGJMP. */
- }
- reginsert(pRExC_state, CURLYX,ret, depth+1);
- /* MJD hk */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Length(ret,
- op == '{' ? (RExC_parse - parse_start) : 1);
-
- if (!SIZE_ONLY && RExC_extralen)
- NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */
- REGTAIL(pRExC_state, ret, reg_node(pRExC_state, NOTHING));
- if (SIZE_ONLY)
- RExC_whilem_seen++, RExC_extralen += 3;
- RExC_naughty += 4 + RExC_naughty; /* compound interest */
- }
- ret->flags = 0;
-
- if (min > 0)
- *flagp = WORST;
- if (max > 0)
- *flagp |= HASWIDTH;
- if (max < min)
- vFAIL("Can't do {n,m} with n > m");
- if (!SIZE_ONLY) {
- ARG1_SET(ret, (U16)min);
- ARG2_SET(ret, (U16)max);
- }
-
- goto nest_check;
- }
- }
-
- if (!ISMULT1(op)) {
- *flagp = flags;
- return(ret);
- }
-
-#if 0 /* Now runtime fix should be reliable. */
-
- /* if this is reinstated, don't forget to put this back into perldiag:
-
- =item Regexp *+ operand could be empty at {#} in regex m/%s/
-
- (F) The part of the regexp subject to either the * or + quantifier
- could match an empty string. The {#} shows in the regular
- expression about where the problem was discovered.
-
- */
-
- if (!(flags&HASWIDTH) && op != '?')
- vFAIL("Regexp *+ operand could be empty");
-#endif
-
- parse_start = RExC_parse;
- nextchar(pRExC_state);
-
- *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH);
-
- if (op == '*' && (flags&SIMPLE)) {
- reginsert(pRExC_state, STAR, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 4;
- }
- else if (op == '*') {
- min = 0;
- goto do_curly;
- }
- else if (op == '+' && (flags&SIMPLE)) {
- reginsert(pRExC_state, PLUS, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 3;
- }
- else if (op == '+') {
- min = 1;
- goto do_curly;
- }
- else if (op == '?') {
- min = 0; max = 1;
- goto do_curly;
- }
- nest_check:
- if (!SIZE_ONLY && !(flags&(HASWIDTH|POSTPONED)) && max > REG_INFTY/3) {
- ckWARN3reg(RExC_parse,
- "%.*s matches null string many times",
- (int)(RExC_parse >= origparse ? RExC_parse - origparse : 0),
- origparse);
- }
-
- if (RExC_parse < RExC_end && *RExC_parse == '?') {
- nextchar(pRExC_state);
- reginsert(pRExC_state, MINMOD, ret, depth+1);
- REGTAIL(pRExC_state, ret, ret + NODE_STEP_REGNODE);
- }
-#ifndef REG_ALLOW_MINMOD_SUSPEND
- else
-#endif
- if (RExC_parse < RExC_end && *RExC_parse == '+') {
- regnode *ender;
- nextchar(pRExC_state);
- ender = reg_node(pRExC_state, SUCCEED);
- REGTAIL(pRExC_state, ret, ender);
- reginsert(pRExC_state, SUSPEND, ret, depth+1);
- ret->flags = 0;
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, ret, ender);
- /*ret= ender;*/
- }
-
- if (RExC_parse < RExC_end && ISMULT2(RExC_parse)) {
- RExC_parse++;
- vFAIL("Nested quantifiers");
- }
-
- return(ret);
-}
-
-
-/* reg_namedseq(pRExC_state,UVp)
-
- This is expected to be called by a parser routine that has
- recognized '\N' and needs to handle the rest. RExC_parse is
- expected to point at the first char following the N at the time
- of the call.
-
- If valuep is non-null then it is assumed that we are parsing inside
- of a charclass definition and the first codepoint in the resolved
- string is returned via *valuep and the routine will return NULL.
- In this mode if a multichar string is returned from the charnames
- handler a warning will be issued, and only the first char in the
- sequence will be examined. If the string returned is zero length
- then the value of *valuep is undefined and NON-NULL will
- be returned to indicate failure. (This will NOT be a valid pointer
- to a regnode.)
-
- If valuep is null then it is assumed that we are parsing normal text
- and inserts a new EXACT node into the program containing the resolved
- string and returns a pointer to the new node. If the string is
- zerolength a NOTHING node is emitted.
-
- On success RExC_parse is set to the char following the endbrace.
- Parsing failures will generate a fatal errorvia vFAIL(...)
-
- NOTE: We cache all results from the charnames handler locally in
- the RExC_charnames hash (created on first use) to prevent a charnames
- handler from playing silly-buggers and returning a short string and
- then a long string for a given pattern. Since the regexp program
- size is calculated during an initial parse this would result
- in a buffer overrun so we cache to prevent the charname result from
- changing during the course of the parse.
-
- */
-STATIC regnode *
-S_reg_namedseq(pTHX_ RExC_state_t *pRExC_state, UV *valuep, I32 *flagp)
-{
- char * name; /* start of the content of the name */
- char * endbrace; /* endbrace following the name */
- SV *sv_str = NULL;
- SV *sv_name = NULL;
- STRLEN len; /* this has various purposes throughout the code */
- bool cached = 0; /* if this is true then we shouldn't refcount dev sv_str */
- regnode *ret = NULL;
-
- PERL_ARGS_ASSERT_REG_NAMEDSEQ;
-
- if (*RExC_parse != '{' ||
- (*RExC_parse == '{' && RExC_parse[1]
- && strchr("0123456789", RExC_parse[1])))
- {
- GET_RE_DEBUG_FLAGS_DECL;
- if (valuep)
- /* no bare \N in a charclass */
- vFAIL("Missing braces on \\N{}");
- GET_RE_DEBUG_FLAGS;
- nextchar(pRExC_state);
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- RExC_parse--;
- Set_Node_Length(ret, 1); /* MJD */
- return ret;
- }
- name = RExC_parse+1;
- endbrace = strchr(RExC_parse, '}');
- if ( ! endbrace ) {
- RExC_parse++;
- vFAIL("Missing right brace on \\N{}");
- }
- RExC_parse = endbrace + 1;
-
-
- /* RExC_parse points at the beginning brace,
- endbrace points at the last */
- if ( name[0]=='U' && name[1]=='+' ) {
- /* its a "Unicode hex" notation {U+89AB} */
- I32 fl = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX
- | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0);
- UV cp;
- len = (STRLEN)(endbrace - name - 2);
- cp = grok_hex(name + 2, &len, &fl, NULL);
- if ( len != (STRLEN)(endbrace - name - 2) ) {
- cp = 0xFFFD;
- }
- if ( valuep ) {
- if (cp > 0xff) RExC_utf8 = 1;
- *valuep = cp;
- return NULL;
- }
-
- /* Need to convert to utf8 if either: won't fit into a byte, or the re
- * is going to be in utf8 and the representation changes under utf8. */
- if (cp > 0xff || (RExC_utf8 && ! UNI_IS_INVARIANT(cp))) {
- U8 string[UTF8_MAXBYTES+1];
- U8 *tmps;
- RExC_utf8 = 1;
- tmps = uvuni_to_utf8(string, cp);
- sv_str = newSVpvn_utf8((char*)string, tmps - string, TRUE);
- } else { /* Otherwise, no need for utf8, can skip that step */
- char string;
- string = (char)cp;
- sv_str= newSVpvn(&string, 1);
- }
- } else {
- /* fetch the charnames handler for this scope */
- HV * const table = GvHV(PL_hintgv);
- SV **cvp= table ?
- hv_fetchs(table, "charnames", FALSE) :
- NULL;
- SV *cv= cvp ? *cvp : NULL;
- HE *he_str;
- int count;
- /* create an SV with the name as argument */
- sv_name = newSVpvn(name, endbrace - name);
-
- if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
- vFAIL2("Constant(\\N{%" SVf "}) unknown: "
- "(possibly a missing \"use charnames ...\")",
- SVfARG(sv_name));
- }
- if (!cvp || !SvOK(*cvp)) { /* when $^H{charnames} = undef; */
- vFAIL2("Constant(\\N{%" SVf "}): "
- "$^H{charnames} is not defined", SVfARG(sv_name));
- }
-
-
-
- if (!RExC_charnames) {
- /* make sure our cache is allocated */
- RExC_charnames = newHV();
- sv_2mortal(MUTABLE_SV(RExC_charnames));
- }
- /* see if we have looked this one up before */
- he_str = hv_fetch_ent( RExC_charnames, sv_name, 0, 0 );
- if ( he_str ) {
- sv_str = HeVAL(he_str);
- cached = 1;
- } else {
- dSP ;
-
- ENTER ;
- SAVETMPS ;
- PUSHMARK(SP) ;
-
- XPUSHs(sv_name);
-
- PUTBACK ;
-
- count= call_sv(cv, G_SCALAR);
-
- if (count == 1) { /* XXXX is this right? dmq */
- sv_str = POPs;
- SvREFCNT_inc_simple_void(sv_str);
- }
-
- SPAGAIN ;
- PUTBACK ;
- FREETMPS ;
- LEAVE ;
-
- if ( !sv_str || !SvOK(sv_str) ) {
- vFAIL2("Constant(\\N{%" SVf "}): Call to &{$^H{charnames}} "
- "did not return a defined value", SVfARG(sv_name));
- }
- if (hv_store_ent( RExC_charnames, sv_name, sv_str, 0))
- cached = 1;
- }
- }
- if (valuep) {
- char *p = SvPV(sv_str, len);
- if (len) {
- STRLEN numlen = 1;
- if ( SvUTF8(sv_str) ) {
- *valuep = utf8_to_uvchr((U8*)p, &numlen);
- if (*valuep > 0x7F)
- RExC_utf8 = 1;
- /* XXXX
- We have to turn on utf8 for high bit chars otherwise
- we get failures with
-
- "ss" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
- "SS" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
-
- This is different from what \x{} would do with the same
- codepoint, where the condition is > 0xFF.
- - dmq
- */
-
-
- } else {
- *valuep = (UV)*p;
- /* warn if we havent used the whole string? */
- }
- if (numlen<len && SIZE_ONLY) {
- ckWARN2reg(RExC_parse,
- "Ignoring excess chars from \\N{%" SVf "} in character class",
- SVfARG(sv_name)
- );
- }
- } else if (SIZE_ONLY) {
- ckWARN2reg(RExC_parse,
- "Ignoring zero length \\N{%" SVf "} in character class",
- SVfARG(sv_name)
- );
- }
- SvREFCNT_dec(sv_name);
- if (!cached)
- SvREFCNT_dec(sv_str);
- return len ? NULL : (regnode *)&len;
- } else if(SvCUR(sv_str)) {
-
- char *s;
- char *p, *pend;
- STRLEN charlen = 1;
-#ifdef DEBUGGING
- char * parse_start = name-3; /* needed for the offsets */
-#endif
- GET_RE_DEBUG_FLAGS_DECL; /* needed for the offsets */
-
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s= STRING(ret);
-
- if ( RExC_utf8 && !SvUTF8(sv_str) ) {
- sv_utf8_upgrade(sv_str);
- } else if ( !RExC_utf8 && SvUTF8(sv_str) ) {
- RExC_utf8= 1;
- }
-
- p = SvPV(sv_str, len);
- pend = p + len;
- /* len is the length written, charlen is the size the char read */
- for ( len = 0; p < pend; p += charlen ) {
- if (UTF) {
- UV uvc = utf8_to_uvchr((U8*)p, &charlen);
- if (FOLD) {
- STRLEN foldlen,numlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
- uvc = toFOLD_uni(uvc, tmpbuf, &foldlen);
- /* Emit all the Unicode characters. */
-
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen)
- {
- uvc = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- } else {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- } else {
- len++;
- REGC(*p, s++);
- }
- }
- if (SIZE_ONLY) {
- RExC_size += STR_SZ(len);
- } else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- } else { /* zero length */
- ret = reg_node(pRExC_state,NOTHING);
- }
- SvREFCNT_dec(sv_name);
- if (!cached)
- SvREFCNT_dec(sv_str);
- return ret;
-
-}
-
-
-/*
- * reg_recode
- *
- * It returns the code point in utf8 for the value in *encp.
- * value: a code value in the source encoding
- * encp: a pointer to an Encode object
- *
- * If the result from Encode is not a single character,
- * it returns U+FFFD (Replacement character) and sets *encp to NULL.
- */
-STATIC UV
-S_reg_recode(pTHX_ const char value, SV **encp)
-{
- STRLEN numlen = 1;
- SV * const sv = newSVpvn_flags(&value, numlen, SVs_TEMP);
- const char * const s = *encp ? sv_recode_to_utf8(sv, *encp) : SvPVX(sv);
- const STRLEN newlen = SvCUR(sv);
- UV uv = UNICODE_REPLACEMENT;
-
- PERL_ARGS_ASSERT_REG_RECODE;
-
- if (newlen)
- uv = SvUTF8(sv)
- ? utf8n_to_uvchr((U8*)s, newlen, &numlen, UTF8_ALLOW_DEFAULT)
- : *(U8*)s;
-
- if (!newlen || numlen != newlen) {
- uv = UNICODE_REPLACEMENT;
- *encp = NULL;
- }
- return uv;
-}
-
-
-/*
- - regatom - the lowest level
-
- Try to identify anything special at the start of the pattern. If there
- is, then handle it as required. This may involve generating a single regop,
- such as for an assertion; or it may involve recursing, such as to
- handle a () structure.
-
- If the string doesn't start with something special then we gobble up
- as much literal text as we can.
-
- Once we have been able to handle whatever type of thing started the
- sequence, we return.
-
- Note: we have to be careful with escapes, as they can be both literal
- and special, and in the case of \10 and friends can either, depending
- on context. Specifically there are two seperate switches for handling
- escape sequences, with the one for handling literal escapes requiring
- a dummy entry for all of the special escapes that are actually handled
- by the other.
-*/
-
-STATIC regnode *
-S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret = NULL;
- I32 flags;
- char *parse_start = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_PARSE("atom");
- *flagp = WORST; /* Tentatively. */
-
- PERL_ARGS_ASSERT_REGATOM;
-
-tryagain:
- switch ((U8)*RExC_parse) {
- case '^':
- RExC_seen_zerolen++;
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MBOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SBOL);
- else
- ret = reg_node(pRExC_state, BOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '$':
- nextchar(pRExC_state);
- if (*RExC_parse)
- RExC_seen_zerolen++;
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MEOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SEOL);
- else
- ret = reg_node(pRExC_state, EOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '.':
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SANY);
- else
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '[':
- {
- char * const oregcomp_parse = ++RExC_parse;
- ret = regclass(pRExC_state,depth+1);
- if (*RExC_parse != ']') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched [");
- }
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */
- break;
- }
- case '(':
- nextchar(pRExC_state);
- ret = reg(pRExC_state, 1, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN) {
- if (RExC_parse == RExC_end) {
- /* Make parent create an empty node if needed. */
- *flagp |= TRYAGAIN;
- return(NULL);
- }
- goto tryagain;
- }
- return(NULL);
- }
- *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE|POSTPONED);
- break;
- case '|':
- case ')':
- if (flags & TRYAGAIN) {
- *flagp |= TRYAGAIN;
- return NULL;
- }
- vFAIL("Internal urp");
- /* Supposed to be caught earlier. */
- break;
- case '{':
- if (!regcurly(RExC_parse)) {
- RExC_parse++;
- goto defchar;
- }
- /* FALL THROUGH */
- case '?':
- case '+':
- case '*':
- RExC_parse++;
- vFAIL("Quantifier follows nothing");
- break;
- case 0xDF:
- case 0xC3:
- case 0xCE:
- do_foldchar:
- if (!LOC && FOLD) {
- U32 len,cp;
- len=0; /* silence a spurious compiler warning */
- if ((cp = what_len_TRICKYFOLD_safe(RExC_parse,RExC_end,UTF,len))) {
- *flagp |= HASWIDTH; /* could be SIMPLE too, but needs a handler in regexec.regrepeat */
- RExC_parse+=len-1; /* we get one from nextchar() as well. :-( */
- ret = reganode(pRExC_state, FOLDCHAR, cp);
- Set_Node_Length(ret, 1); /* MJD */
- nextchar(pRExC_state); /* kill whitespace under /x */
- return ret;
- }
- }
- goto outer_default;
- case '\\':
- /* Special Escapes
-
- This switch handles escape sequences that resolve to some kind
- of special regop and not to literal text. Escape sequnces that
- resolve to literal text are handled below in the switch marked
- "Literal Escapes".
-
- Every entry in this switch *must* have a corresponding entry
- in the literal escape switch. However, the opposite is not
- required, as the default for this switch is to jump to the
- literal text handling code.
- */
- switch ((U8)*++RExC_parse) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- goto do_foldchar;
- /* Special Escapes */
- case 'A':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, SBOL);
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'G':
- ret = reg_node(pRExC_state, GPOS);
- RExC_seen |= REG_SEEN_GPOS;
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'K':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, KEEPS);
- *flagp |= SIMPLE;
- /* XXX:dmq : disabling in-place substitution seems to
- * be necessary here to avoid cases of memory corruption, as
- * with: C<$_="x" x 80; s/x\K/y/> -- rgs
- */
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- goto finish_meta_pat;
- case 'Z':
- ret = reg_node(pRExC_state, SEOL);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'z':
- ret = reg_node(pRExC_state, EOS);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'C':
- ret = reg_node(pRExC_state, CANY);
- RExC_seen |= REG_SEEN_CANY;
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'X':
- ret = reg_node(pRExC_state, CLUMP);
- *flagp |= HASWIDTH;
- goto finish_meta_pat;
- case 'w':
- ret = reg_node(pRExC_state, (U8)(LOC ? ALNUML : ALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'W':
- ret = reg_node(pRExC_state, (U8)(LOC ? NALNUML : NALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'b':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? BOUNDL : BOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'B':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? NBOUNDL : NBOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 's':
- ret = reg_node(pRExC_state, (U8)(LOC ? SPACEL : SPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'S':
- ret = reg_node(pRExC_state, (U8)(LOC ? NSPACEL : NSPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'd':
- ret = reg_node(pRExC_state, DIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'D':
- ret = reg_node(pRExC_state, NDIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'R':
- ret = reg_node(pRExC_state, LNBREAK);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'h':
- ret = reg_node(pRExC_state, HORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'H':
- ret = reg_node(pRExC_state, NHORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'v':
- ret = reg_node(pRExC_state, VERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'V':
- ret = reg_node(pRExC_state, NVERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- finish_meta_pat:
- nextchar(pRExC_state);
- Set_Node_Length(ret, 2); /* MJD */
- break;
- case 'p':
- case 'P':
- {
- char* const oldregxend = RExC_end;
-#ifdef DEBUGGING
- char* parse_start = RExC_parse - 2;
-#endif
-
- if (RExC_parse[1] == '{') {
- /* a lovely hack--pretend we saw [\pX] instead */
- RExC_end = strchr(RExC_parse, '}');
- if (!RExC_end) {
- const U8 c = (U8)*RExC_parse;
- RExC_parse += 2;
- RExC_end = oldregxend;
- vFAIL2("Missing right brace on \\%c{}", c);
- }
- RExC_end++;
- }
- else {
- RExC_end = RExC_parse + 2;
- if (RExC_end > oldregxend)
- RExC_end = oldregxend;
- }
- RExC_parse--;
-
- ret = regclass(pRExC_state,depth+1);
-
- RExC_end = oldregxend;
- RExC_parse--;
-
- Set_Node_Offset(ret, parse_start + 2);
- Set_Node_Cur_Length(ret);
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- }
- break;
- case 'N':
- /* Handle \N and \N{NAME} here and not below because it can be
- multicharacter. join_exact() will join them up later on.
- Also this makes sure that things like /\N{BLAH}+/ and
- \N{BLAH} being multi char Just Happen. dmq*/
- ++RExC_parse;
- ret= reg_namedseq(pRExC_state, NULL, flagp);
- break;
- case 'k': /* Handle \k<NAME> and \k'NAME' */
- parse_named_seq:
- {
- char ch= RExC_parse[1];
- if (ch != '<' && ch != '\'' && ch != '{') {
- RExC_parse++;
- vFAIL2("Sequence %.2s... not terminated",parse_start);
- } else {
- /* this pretty much dupes the code for (?P=...) in reg(), if
- you change this make sure you change that */
- char* name_start = (RExC_parse += 2);
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- ch= (ch == '<') ? '>' : (ch == '{') ? '}' : '\'';
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
-
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
-
- }
- break;
- }
- case 'g':
- case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 num;
- bool isg = *RExC_parse == 'g';
- bool isrel = 0;
- bool hasbrace = 0;
- if (isg) {
- RExC_parse++;
- if (*RExC_parse == '{') {
- RExC_parse++;
- hasbrace = 1;
- }
- if (*RExC_parse == '-') {
- RExC_parse++;
- isrel = 1;
- }
- if (hasbrace && !isDIGIT(*RExC_parse)) {
- if (isrel) RExC_parse--;
- RExC_parse -= 2;
- goto parse_named_seq;
- } }
- num = atoi(RExC_parse);
- if (isg && num == 0)
- vFAIL("Reference to invalid group 0");
- if (isrel) {
- num = RExC_npar - num;
- if (num < 1)
- vFAIL("Reference to nonexistent or unclosed group");
- }
- if (!isg && num > 9 && num >= RExC_npar)
- goto defchar;
- else {
- char * const parse_start = RExC_parse - 1; /* MJD */
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (parse_start == RExC_parse - 1)
- vFAIL("Unterminated \\g... pattern");
- if (hasbrace) {
- if (*RExC_parse != '}')
- vFAIL("Unterminated \\g{...} pattern");
- RExC_parse++;
- }
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens)
- vFAIL("Reference to nonexistent group");
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? REFFL : REFF) : REF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- }
- }
- break;
- case '\0':
- if (RExC_parse >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- /* Do not generate "unrecognized" warnings here, we fall
- back into the quick-grab loop below */
- parse_start--;
- goto defchar;
- }
- break;
-
- case '#':
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if ( reg_skipcomment( pRExC_state ) )
- goto tryagain;
- }
- /* FALL THROUGH */
-
- default:
- outer_default:{
- register STRLEN len;
- register UV ender;
- register char *p;
- char *s;
- STRLEN foldlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
-
- parse_start = RExC_parse - 1;
-
- RExC_parse++;
-
- defchar:
- ender = 0;
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s = STRING(ret);
- for (len = 0, p = RExC_parse - 1;
- len < 127 && p < RExC_end;
- len++)
- {
- char * const oldp = p;
-
- if (RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- switch ((U8)*p) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case '^':
- case '$':
- case '.':
- case '[':
- case '(':
- case ')':
- case '|':
- goto loopdone;
- case '\\':
- /* Literal Escapes Switch
-
- This switch is meant to handle escape sequences that
- resolve to a literal character.
-
- Every escape sequence that represents something
- else, like an assertion or a char class, is handled
- in the switch marked 'Special Escapes' above in this
- routine, but also has an entry here as anything that
- isn't explicitly mentioned here will be treated as
- an unescaped equivalent literal.
- */
-
- switch ((U8)*++p) {
- /* These are all the special escapes. */
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case 'A': /* Start assertion */
- case 'b': case 'B': /* Word-boundary assertion*/
- case 'C': /* Single char !DANGEROUS! */
- case 'd': case 'D': /* digit class */
- case 'g': case 'G': /* generic-backref, pos assertion */
- case 'h': case 'H': /* HORIZWS */
- case 'k': case 'K': /* named backref, keep marker */
- case 'N': /* named char sequence */
- case 'p': case 'P': /* Unicode property */
- case 'R': /* LNBREAK */
- case 's': case 'S': /* space class */
- case 'v': case 'V': /* VERTWS */
- case 'w': case 'W': /* word class */
- case 'X': /* eXtended Unicode "combining character sequence" */
- case 'z': case 'Z': /* End of line/string assertion */
- --p;
- goto loopdone;
-
- /* Anything after here is an escape that resolves to a
- literal. (Except digits, which may or may not)
- */
- case 'n':
- ender = '\n';
- p++;
- break;
- case 'r':
- ender = '\r';
- p++;
- break;
- case 't':
- ender = '\t';
- p++;
- break;
- case 'f':
- ender = '\f';
- p++;
- break;
- case 'e':
- ender = ASCII_TO_NATIVE('\033');
- p++;
- break;
- case 'a':
- ender = ASCII_TO_NATIVE('\007');
- p++;
- break;
- case 'x':
- if (*++p == '{') {
- char* const e = strchr(p, '}');
-
- if (!e) {
- RExC_parse = p + 1;
- vFAIL("Missing right brace on \\x{}");
- }
- else {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = e - p - 1;
- ender = grok_hex(p + 1, &numlen, &flags, NULL);
- if (ender > 0xff)
- RExC_utf8 = 1;
- p = e + 1;
- }
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = 2;
- ender = grok_hex(p, &numlen, &flags, NULL);
- p += numlen;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- p++;
- ender = UCHARAT(p++);
- ender = toCTRL(ender);
- break;
- case '0': case '1': case '2': case '3':case '4':
- case '5': case '6': case '7': case '8':case '9':
- if (*p == '0' ||
- (isDIGIT(p[1]) && atoi(p) >= RExC_npar) ) {
- I32 flags = 0;
- STRLEN numlen = 3;
- ender = grok_oct(p, &numlen, &flags, NULL);
-
- /* An octal above 0xff is interpreted differently
- * depending on if the re is in utf8 or not. If it
- * is in utf8, the value will be itself, otherwise
- * it is interpreted as modulo 0x100. It has been
- * decided to discourage the use of octal above the
- * single-byte range. For now, warn only when
- * it ends up modulo */
- if (SIZE_ONLY && ender >= 0x100
- && ! UTF && ! PL_encoding) {
- ckWARNregdep(p, "Use of octal value above 377 is deprecated");
- }
- p += numlen;
- }
- else {
- --p;
- goto loopdone;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- recode_encoding:
- {
- SV* enc = PL_encoding;
- ender = reg_recode((const char)(U8)ender, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(p, "Invalid escape in the specified encoding");
- RExC_utf8 = 1;
- }
- break;
- case '\0':
- if (p >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- if (!SIZE_ONLY&& isALPHA(*p))
- ckWARN2reg(p + 1, "Unrecognized escape \\%c passed through", UCHARAT(p));
- goto normal_default;
- }
- break;
- default:
- normal_default:
- if (UTF8_IS_START(*p) && UTF) {
- STRLEN numlen;
- ender = utf8n_to_uvchr((U8*)p, RExC_end - p,
- &numlen, UTF8_ALLOW_DEFAULT);
- p += numlen;
- }
- else
- ender = *p++;
- break;
- }
- if ( RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- if (UTF && FOLD) {
- /* Prime the casefolded buffer. */
- ender = toFOLD_uni(ender, tmpbuf, &foldlen);
- }
- if (p < RExC_end && ISMULT2(p)) { /* Back off on ?+*. */
- if (len)
- p = oldp;
- else if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- }
- else {
- len++;
- REGC((char)ender, s++);
- }
- break;
- }
- if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- len += unilen;
- s += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break;
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- len--;
- }
- else
- REGC((char)ender, s++);
- }
- loopdone:
- RExC_parse = p - 1;
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
- {
- /* len is STRLEN which is unsigned, need to copy to signed */
- IV iv = len;
- if (iv < 0)
- vFAIL("Internal disaster");
- }
- if (len > 0)
- *flagp |= HASWIDTH;
- if (len == 1 && UNI_IS_INVARIANT(ender))
- *flagp |= SIMPLE;
-
- if (SIZE_ONLY)
- RExC_size += STR_SZ(len);
- else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- }
- break;
- }
-
- return(ret);
-}
-
-STATIC char *
-S_regwhite( RExC_state_t *pRExC_state, char *p )
-{
- const char *e = RExC_end;
-
- PERL_ARGS_ASSERT_REGWHITE;
-
- while (p < e) {
- if (isSPACE(*p))
- ++p;
- else if (*p == '#') {
- bool ended = 0;
- do {
- if (*p++ == '\n') {
- ended = 1;
- break;
- }
- } while (p < e);
- if (!ended)
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- }
- else
- break;
- }
- return p;
-}
-
-/* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]].
- Character classes ([:foo:]) can also be negated ([:^foo:]).
- Returns a named class id (ANYOF_XXX) if successful, -1 otherwise.
- Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed,
- but trigger failures because they are currently unimplemented. */
-
-#define POSIXCC_DONE(c) ((c) == ':')
-#define POSIXCC_NOTYET(c) ((c) == '=' || (c) == '.')
-#define POSIXCC(c) (POSIXCC_DONE(c) || POSIXCC_NOTYET(c))
-
-STATIC I32
-S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value)
-{
- dVAR;
- I32 namedclass = OOB_NAMEDCLASS;
-
- PERL_ARGS_ASSERT_REGPPOSIXCC;
-
- if (value == '[' && RExC_parse + 1 < RExC_end &&
- /* I smell either [: or [= or [. -- POSIX has been here, right? */
- POSIXCC(UCHARAT(RExC_parse))) {
- const char c = UCHARAT(RExC_parse);
- char* const s = RExC_parse++;
-
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != c)
- RExC_parse++;
- if (RExC_parse == RExC_end)
- /* Grandfather lone [:, [=, [. */
- RExC_parse = s;
- else {
- const char* const t = RExC_parse++; /* skip over the c */
- assert(*t == c);
-
- if (UCHARAT(RExC_parse) == ']') {
- const char *posixcc = s + 1;
- RExC_parse++; /* skip over the ending ] */
-
- if (*s == ':') {
- const I32 complement = *posixcc == '^' ? *posixcc++ : 0;
- const I32 skip = t - posixcc;
-
- /* Initially switch on the length of the name. */
- switch (skip) {
- case 4:
- if (memEQ(posixcc, "word", 4)) /* this is not POSIX, this is the Perl \w */
- namedclass = complement ? ANYOF_NALNUM : ANYOF_ALNUM;
- break;
- case 5:
- /* Names all of length 5. */
- /* alnum alpha ascii blank cntrl digit graph lower
- print punct space upper */
- /* Offset 4 gives the best switch position. */
- switch (posixcc[4]) {
- case 'a':
- if (memEQ(posixcc, "alph", 4)) /* alpha */
- namedclass = complement ? ANYOF_NALPHA : ANYOF_ALPHA;
- break;
- case 'e':
- if (memEQ(posixcc, "spac", 4)) /* space */
- namedclass = complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC;
- break;
- case 'h':
- if (memEQ(posixcc, "grap", 4)) /* graph */
- namedclass = complement ? ANYOF_NGRAPH : ANYOF_GRAPH;
- break;
- case 'i':
- if (memEQ(posixcc, "asci", 4)) /* ascii */
- namedclass = complement ? ANYOF_NASCII : ANYOF_ASCII;
- break;
- case 'k':
- if (memEQ(posixcc, "blan", 4)) /* blank */
- namedclass = complement ? ANYOF_NBLANK : ANYOF_BLANK;
- break;
- case 'l':
- if (memEQ(posixcc, "cntr", 4)) /* cntrl */
- namedclass = complement ? ANYOF_NCNTRL : ANYOF_CNTRL;
- break;
- case 'm':
- if (memEQ(posixcc, "alnu", 4)) /* alnum */
- namedclass = complement ? ANYOF_NALNUMC : ANYOF_ALNUMC;
- break;
- case 'r':
- if (memEQ(posixcc, "lowe", 4)) /* lower */
- namedclass = complement ? ANYOF_NLOWER : ANYOF_LOWER;
- else if (memEQ(posixcc, "uppe", 4)) /* upper */
- namedclass = complement ? ANYOF_NUPPER : ANYOF_UPPER;
- break;
- case 't':
- if (memEQ(posixcc, "digi", 4)) /* digit */
- namedclass = complement ? ANYOF_NDIGIT : ANYOF_DIGIT;
- else if (memEQ(posixcc, "prin", 4)) /* print */
- namedclass = complement ? ANYOF_NPRINT : ANYOF_PRINT;
- else if (memEQ(posixcc, "punc", 4)) /* punct */
- namedclass = complement ? ANYOF_NPUNCT : ANYOF_PUNCT;
- break;
- }
- break;
- case 6:
- if (memEQ(posixcc, "xdigit", 6))
- namedclass = complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT;
- break;
- }
-
- if (namedclass == OOB_NAMEDCLASS)
- Simple_vFAIL3("POSIX class [:%.*s:] unknown",
- t - s - 1, s + 1);
- assert (posixcc[skip] == ':');
- assert (posixcc[skip+1] == ']');
- } else if (!SIZE_ONLY) {
- /* [[=foo=]] and [[.foo.]] are still future. */
-
- /* adjust RExC_parse so the warning shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse) != ']')
- RExC_parse++;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- } else {
- /* Maternal grandfather:
- * "[:" ending in ":" but not in ":]" */
- RExC_parse = s;
- }
- }
- }
-
- return namedclass;
-}
-
-STATIC void
-S_checkposixcc(pTHX_ RExC_state_t *pRExC_state)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_CHECKPOSIXCC;
-
- if (POSIXCC(UCHARAT(RExC_parse))) {
- const char *s = RExC_parse;
- const char c = *s++;
-
- while (isALNUM(*s))
- s++;
- if (*s && c == *s && s[1] == ']') {
- ckWARN3reg(s+2,
- "POSIX syntax [%c %c] belongs inside character classes",
- c, c);
-
- /* [[=foo=]] and [[.foo.]] are still future. */
- if (POSIXCC_NOTYET(c)) {
- /* adjust RExC_parse so the error shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse++) != ']')
- NOOP;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- }
- }
-}
-
-
-#define _C_C_T_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_N##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '!'; \
- what = WORD; \
- break
-
-#define _C_C_T_NOLOC_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '!'; \
- what = WORD; \
- break
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define POSIX_CC_UNI_NAME(CCNAME) CCNAME
-#else
-#define POSIX_CC_UNI_NAME(CCNAME) "Posix" CCNAME
-#endif
-
-/*
- parse a class specification and produce either an ANYOF node that
- matches the pattern or if the pattern matches a single char only and
- that char is < 256 and we are case insensitive then we produce an
- EXACT node instead.
-*/
-
-STATIC regnode *
-S_regclass(pTHX_ RExC_state_t *pRExC_state, U32 depth)
-{
- dVAR;
- register UV nextvalue;
- register IV prevvalue = OOB_UNICODE;
- register IV range = 0;
- UV value = 0; /* XXX:dmq: needs to be referenceable (unfortunately) */
- register regnode *ret;
- STRLEN numlen;
- IV namedclass;
- char *rangebegin = NULL;
- bool need_class = 0;
- SV *listsv = NULL;
- UV n;
- bool optimize_invert = TRUE;
- AV* unicode_alternate = NULL;
-#ifdef EBCDIC
- UV literal_endpoint = 0;
-#endif
- UV stored = 0; /* number of chars stored in the class */
-
- regnode * const orig_emit = RExC_emit; /* Save the original RExC_emit in
- case we need to change the emitted regop to an EXACT. */
- const char * orig_parse = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCLASS;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- DEBUG_PARSE("clas");
-
- /* Assume we are going to generate an ANYOF node. */
- ret = reganode(pRExC_state, ANYOF, 0);
-
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) = 0;
-
- if (UCHARAT(RExC_parse) == '^') { /* Complement of range. */
- RExC_naughty++;
- RExC_parse++;
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) |= ANYOF_INVERT;
- }
-
- if (SIZE_ONLY) {
- RExC_size += ANYOF_SKIP;
- listsv = &PL_sv_undef; /* For code scanners: listsv always non-NULL. */
- }
- else {
- RExC_emit += ANYOF_SKIP;
- if (FOLD)
- ANYOF_FLAGS(ret) |= ANYOF_FOLD;
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_LOCALE;
- ANYOF_BITMAP_ZERO(ret);
- listsv = newSVpvs("# comment\n");
- }
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
-
- if (!SIZE_ONLY && POSIXCC(nextvalue))
- checkposixcc(pRExC_state);
-
- /* allow 1st char to be ] (allowing it to be - is dealt with later) */
- if (UCHARAT(RExC_parse) == ']')
- goto charclassloop;
-
-parseit:
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != ']') {
-
- charclassloop:
-
- namedclass = OOB_NAMEDCLASS; /* initialize as illegal */
-
- if (!range)
- rangebegin = RExC_parse;
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
- if (value == '[' && POSIXCC(nextvalue))
- namedclass = regpposixcc(pRExC_state, value);
- else if (value == '\\') {
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
- /* Some compilers cannot handle switching on 64-bit integer
- * values, therefore value cannot be an UV. Yes, this will
- * be a problem later if we want switch on Unicode.
- * A similar issue a little bit later when switching on
- * namedclass. --jhi */
- switch ((I32)value) {
- case 'w': namedclass = ANYOF_ALNUM; break;
- case 'W': namedclass = ANYOF_NALNUM; break;
- case 's': namedclass = ANYOF_SPACE; break;
- case 'S': namedclass = ANYOF_NSPACE; break;
- case 'd': namedclass = ANYOF_DIGIT; break;
- case 'D': namedclass = ANYOF_NDIGIT; break;
- case 'v': namedclass = ANYOF_VERTWS; break;
- case 'V': namedclass = ANYOF_NVERTWS; break;
- case 'h': namedclass = ANYOF_HORIZWS; break;
- case 'H': namedclass = ANYOF_NHORIZWS; break;
- case 'N': /* Handle \N{NAME} in class */
- {
- /* We only pay attention to the first char of
- multichar strings being returned. I kinda wonder
- if this makes sense as it does change the behaviour
- from earlier versions, OTOH that behaviour was broken
- as well. */
- UV v; /* value is register so we cant & it /grrr */
- if (reg_namedseq(pRExC_state, &v, NULL)) {
- goto parseit;
- }
- value= v;
- }
- break;
- case 'p':
- case 'P':
- {
- char *e;
- if (RExC_parse >= RExC_end)
- vFAIL2("Empty \\%c{}", (U8)value);
- if (*RExC_parse == '{') {
- const U8 c = (U8)value;
- e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL2("Missing right brace on \\%c{}", c);
- while (isSPACE(UCHARAT(RExC_parse)))
- RExC_parse++;
- if (e == RExC_parse)
- vFAIL2("Empty \\%c{}", c);
- n = e - RExC_parse;
- while (isSPACE(UCHARAT(RExC_parse + n - 1)))
- n--;
- }
- else {
- e = RExC_parse;
- n = 1;
- }
- if (!SIZE_ONLY) {
- if (UCHARAT(RExC_parse) == '^') {
- RExC_parse++;
- n--;
- value = value == 'p' ? 'P' : 'p'; /* toggle */
- while (isSPACE(UCHARAT(RExC_parse))) {
- RExC_parse++;
- n--;
- }
- }
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::%.*s\n",
- (value=='p' ? '+' : '!'), (int)n, RExC_parse);
- }
- RExC_parse = e + 1;
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- namedclass = ANYOF_MAX; /* no official name, but it's named */
- }
- break;
- case 'n': value = '\n'; break;
- case 'r': value = '\r'; break;
- case 't': value = '\t'; break;
- case 'f': value = '\f'; break;
- case 'b': value = '\b'; break;
- case 'e': value = ASCII_TO_NATIVE('\033');break;
- case 'a': value = ASCII_TO_NATIVE('\007');break;
- case 'x':
- if (*RExC_parse == '{') {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- char * const e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL("Missing right brace on \\x{}");
-
- numlen = e - RExC_parse;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse = e + 1;
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- numlen = 2;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- }
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- value = UCHARAT(RExC_parse++);
- value = toCTRL(value);
- break;
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 flags = 0;
- numlen = 3;
- value = grok_oct(--RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- }
- recode_encoding:
- {
- SV* enc = PL_encoding;
- value = reg_recode((const char)(U8)value, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(RExC_parse,
- "Invalid escape in the specified encoding");
- break;
- }
- default:
- if (!SIZE_ONLY && isALPHA(value))
- ckWARN2reg(RExC_parse,
- "Unrecognized escape \\%c in character class passed through",
- (int)value);
- break;
- }
- } /* end of \blah */
-#ifdef EBCDIC
- else
- literal_endpoint++;
-#endif
-
- if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */
-
- if (!SIZE_ONLY && !need_class)
- ANYOF_CLASS_ZERO(ret);
-
- need_class = 1;
-
- /* a bad range like a-\d, a-[:digit:] ? */
- if (range) {
- if (!SIZE_ONLY) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- ckWARN4reg(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
-
- if (prevvalue < 256) {
- ANYOF_BITMAP_SET(ret, prevvalue);
- ANYOF_BITMAP_SET(ret, '-');
- }
- else {
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-');
- }
- }
-
- range = 0; /* this was not a true range */
- }
-
-
-
- if (!SIZE_ONLY) {
- const char *what = NULL;
- char yesno = 0;
-
- if (namedclass > OOB_NAMEDCLASS)
- optimize_invert = FALSE;
- /* Possible truncation here but in some 64-bit environments
- * the compiler gets heartburn about switch on 64-bit values.
- * A similar issue a little earlier when switching on value.
- * --jhi */
- switch ((I32)namedclass) {
-
- case _C_C_T_(ALNUMC, isALNUMC(value), POSIX_CC_UNI_NAME("Alnum"));
- case _C_C_T_(ALPHA, isALPHA(value), POSIX_CC_UNI_NAME("Alpha"));
- case _C_C_T_(BLANK, isBLANK(value), POSIX_CC_UNI_NAME("Blank"));
- case _C_C_T_(CNTRL, isCNTRL(value), POSIX_CC_UNI_NAME("Cntrl"));
- case _C_C_T_(GRAPH, isGRAPH(value), POSIX_CC_UNI_NAME("Graph"));
- case _C_C_T_(LOWER, isLOWER(value), POSIX_CC_UNI_NAME("Lower"));
- case _C_C_T_(PRINT, isPRINT(value), POSIX_CC_UNI_NAME("Print"));
- case _C_C_T_(PSXSPC, isPSXSPC(value), POSIX_CC_UNI_NAME("Space"));
- case _C_C_T_(PUNCT, isPUNCT(value), POSIX_CC_UNI_NAME("Punct"));
- case _C_C_T_(UPPER, isUPPER(value), POSIX_CC_UNI_NAME("Upper"));
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
- case _C_C_T_(ALNUM, isALNUM(value), "Word");
- case _C_C_T_(SPACE, isSPACE(value), "SpacePerl");
-#else
- case _C_C_T_(SPACE, isSPACE(value), "PerlSpace");
- case _C_C_T_(ALNUM, isALNUM(value), "PerlWord");
-#endif
- case _C_C_T_(XDIGIT, isXDIGIT(value), "XDigit");
- case _C_C_T_NOLOC_(VERTWS, is_VERTWS_latin1(&value), "VertSpace");
- case _C_C_T_NOLOC_(HORIZWS, is_HORIZWS_latin1(&value), "HorizSpace");
- case ANYOF_ASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_ASCII);
- else {
-#ifndef EBCDIC
- for (value = 0; value < 128; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '+';
- what = "ASCII";
- break;
- case ANYOF_NASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NASCII);
- else {
-#ifndef EBCDIC
- for (value = 128; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (!isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '!';
- what = "ASCII";
- break;
- case ANYOF_DIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_DIGIT);
- else {
- /* consecutive digits assumed */
- for (value = '0'; value <= '9'; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '+';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_NDIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NDIGIT);
- else {
- /* consecutive digits assumed */
- for (value = 0; value < '0'; value++)
- ANYOF_BITMAP_SET(ret, value);
- for (value = '9' + 1; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '!';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_MAX:
- /* this is to handle \p and \P */
- break;
- default:
- vFAIL("Invalid [::] class");
- break;
- }
- if (what) {
- /* Strings such as "+utf8::isWord\n" */
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::Is%s\n", yesno, what);
- }
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_CLASS;
- continue;
- }
- } /* end of namedclass \blah */
-
- if (range) {
- if (prevvalue > (IV)value) /* b-a */ {
- const int w = RExC_parse - rangebegin;
- Simple_vFAIL4("Invalid [] range \"%*.*s\"", w, w, rangebegin);
- range = 0; /* not a valid range */
- }
- }
- else {
- prevvalue = value; /* save the beginning of the range */
- if (*RExC_parse == '-' && RExC_parse+1 < RExC_end &&
- RExC_parse[1] != ']') {
- RExC_parse++;
-
- /* a bad range like \w-, [:word:]- ? */
- if (namedclass > OOB_NAMEDCLASS) {
- if (ckWARN(WARN_REGEXP)) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- vWARN4(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
- }
- if (!SIZE_ONLY)
- ANYOF_BITMAP_SET(ret, '-');
- } else
- range = 1; /* yeah, it's a range! */
- continue; /* but do it the next time */
- }
- }
-
- /* now is the next time */
- /*stored += (value - prevvalue + 1);*/
- if (!SIZE_ONLY) {
- if (prevvalue < 256) {
- const IV ceilvalue = value < 256 ? value : 255;
- IV i;
-#ifdef EBCDIC
- /* In EBCDIC [\x89-\x91] should include
- * the \x8e but [i-j] should not. */
- if (literal_endpoint == 2 &&
- ((isLOWER(prevvalue) && isLOWER(ceilvalue)) ||
- (isUPPER(prevvalue) && isUPPER(ceilvalue))))
- {
- if (isLOWER(prevvalue)) {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isLOWER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- } else {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isUPPER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- else
-#endif
- for (i = prevvalue; i <= ceilvalue; i++) {
- if (!ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- if (value > 255 || UTF) {
- const UV prevnatvalue = NATIVE_TO_UNI(prevvalue);
- const UV natvalue = NATIVE_TO_UNI(value);
- stored+=2; /* can't optimize this class */
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- if (prevnatvalue < natvalue) { /* what about > ? */
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n",
- prevnatvalue, natvalue);
- }
- else if (prevnatvalue == natvalue) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", natvalue);
- if (FOLD) {
- U8 foldbuf[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const UV f = to_uni_fold(natvalue, foldbuf, &foldlen);
-
-#ifdef EBCDIC /* RD t/uni/fold ff and 6b */
- if (RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xDF || f == 0x92)) {
- f = NATIVE_TO_UNI(f);
- }
-#endif
- /* If folding and foldable and a single
- * character, insert also the folded version
- * to the charclass. */
- if (f != value) {
-#ifdef EBCDIC /* RD tunifold ligatures s,t fb05, fb06 */
- if ((RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xA2 &&
- (value == 0xFB05 || value == 0xFB06))) ?
- foldlen == ((STRLEN)UNISKIP(f) - 1) :
- foldlen == (STRLEN)UNISKIP(f) )
-#else
- if (foldlen == (STRLEN)UNISKIP(f))
-#endif
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n", f);
- else {
- /* Any multicharacter foldings
- * require the following transform:
- * [ABCDEF] -> (?:[ABCabcDEFd]|pq|rst)
- * where E folds into "pq" and F folds
- * into "rst", all other characters
- * fold to single characters. We save
- * away these multicharacter foldings,
- * to be later saved as part of the
- * additional "s" data. */
- SV *sv;
-
- if (!unicode_alternate)
- unicode_alternate = newAV();
- sv = newSVpvn_utf8((char*)foldbuf, foldlen,
- TRUE);
- av_push(unicode_alternate, sv);
- }
- }
-
- /* If folding and the value is one of the Greek
- * sigmas insert a few more sigmas to make the
- * folding rules of the sigmas to work right.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (literal or EXACTF cases) are handled
- * during runtime in regexec.c:S_find_byclass(). */
- if (value == UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA);
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- else if (value == UNICODE_GREEK_CAPITAL_LETTER_SIGMA)
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- }
- }
-#ifdef EBCDIC
- literal_endpoint = 0;
-#endif
- }
-
- range = 0; /* this range (if it was one) is done now */
- }
-
- if (need_class) {
- ANYOF_FLAGS(ret) |= ANYOF_LARGE;
- if (SIZE_ONLY)
- RExC_size += ANYOF_CLASS_ADD_SKIP;
- else
- RExC_emit += ANYOF_CLASS_ADD_SKIP;
- }
-
-
- if (SIZE_ONLY)
- return ret;
- /****** !SIZE_ONLY AFTER HERE *********/
-
- if( stored == 1 && (value < 128 || (value < 256 && !UTF))
- && !( ANYOF_FLAGS(ret) & ( ANYOF_FLAGS_ALL ^ ANYOF_FOLD ) )
- ) {
- /* optimize single char class to an EXACT node
- but *only* when its not a UTF/high char */
- const char * cur_parse= RExC_parse;
- RExC_emit = (regnode *)orig_emit;
- RExC_parse = (char *)orig_parse;
- ret = reg_node(pRExC_state,
- (U8)((ANYOF_FLAGS(ret) & ANYOF_FOLD) ? EXACTF : EXACT));
- RExC_parse = (char *)cur_parse;
- *STRING(ret)= (char)value;
- STR_LEN(ret)= 1;
- RExC_emit += STR_SZ(1);
- SvREFCNT_dec(listsv);
- return ret;
- }
- /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */
- if ( /* If the only flag is folding (plus possibly inversion). */
- ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD)
- ) {
- for (value = 0; value < 256; ++value) {
- if (ANYOF_BITMAP_TEST(ret, value)) {
- UV fold = PL_fold[value];
-
- if (fold != value)
- ANYOF_BITMAP_SET(ret, fold);
- }
- }
- ANYOF_FLAGS(ret) &= ~ANYOF_FOLD;
- }
-
- /* optimize inverted simple patterns (e.g. [^a-z]) */
- if (optimize_invert &&
- /* If the only flag is inversion. */
- (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) {
- for (value = 0; value < ANYOF_BITMAP_SIZE; ++value)
- ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL;
- ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL;
- }
- {
- AV * const av = newAV();
- SV *rv;
- /* The 0th element stores the character class description
- * in its textual form: used later (regexec.c:Perl_regclass_swash())
- * to initialize the appropriate swash (which gets stored in
- * the 1st element), and also useful for dumping the regnode.
- * The 2nd element stores the multicharacter foldings,
- * used later (regexec.c:S_reginclass()). */
- av_store(av, 0, listsv);
- av_store(av, 1, NULL);
- av_store(av, 2, MUTABLE_SV(unicode_alternate));
- rv = newRV_noinc(MUTABLE_SV(av));
- n = add_data(pRExC_state, 1, "s");
- RExC_rxi->data->data[n] = (void*)rv;
- ARG_SET(ret, n);
- }
- return ret;
-}
-#undef _C_C_T_
-
-
-/* reg_skipcomment()
-
- Absorbs an /x style # comments from the input stream.
- Returns true if there is more text remaining in the stream.
- Will set the REG_SEEN_RUN_ON_COMMENT flag if the comment
- terminates the pattern without including a newline.
-
- Note its the callers responsibility to ensure that we are
- actually in /x mode
-
-*/
-
-STATIC bool
-S_reg_skipcomment(pTHX_ RExC_state_t *pRExC_state)
-{
- bool ended = 0;
-
- PERL_ARGS_ASSERT_REG_SKIPCOMMENT;
-
- while (RExC_parse < RExC_end)
- if (*RExC_parse++ == '\n') {
- ended = 1;
- break;
- }
- if (!ended) {
- /* we ran off the end of the pattern without ending
- the comment, so we have to add an \n when wrapping */
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- return 0;
- } else
- return 1;
-}
-
-/* nextchar()
-
- Advance that parse position, and optionall absorbs
- "whitespace" from the inputstream.
-
- Without /x "whitespace" means (?#...) style comments only,
- with /x this means (?#...) and # comments and whitespace proper.
-
- Returns the RExC_parse point from BEFORE the scan occurs.
-
- This is the /x friendly way of saying RExC_parse++.
-*/
-
-STATIC char*
-S_nextchar(pTHX_ RExC_state_t *pRExC_state)
-{
- char* const retval = RExC_parse++;
-
- PERL_ARGS_ASSERT_NEXTCHAR;
-
- for (;;) {
- if (*RExC_parse == '(' && RExC_parse[1] == '?' &&
- RExC_parse[2] == '#') {
- while (*RExC_parse != ')') {
- if (RExC_parse == RExC_end)
- FAIL("Sequence (?#... not terminated");
- RExC_parse++;
- }
- RExC_parse++;
- continue;
- }
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if (isSPACE(*RExC_parse)) {
- RExC_parse++;
- continue;
- }
- else if (*RExC_parse == '#') {
- if ( reg_skipcomment( pRExC_state ) )
- continue;
- }
- }
- return retval;
- }
-}
-
-/*
-- reg_node - emit a node
-*/
-STATIC regnode * /* Location. */
-S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 1;
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE(ptr, op);
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, (ptr) - 1);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s:%d: (op %s) %s %"UVuf" (len %"UVuf") (max %"UVuf").\n",
- "reg_node", __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(RExC_emit, RExC_parse + (op == END));
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reganode - emit a node with an argument
-*/
-STATIC regnode * /* Location. */
-S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGANODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 2;
- /*
- We can't do this:
-
- assert(2==regarglen[op]+1);
-
- Anything larger than this has to allocate the extra amount.
- If we changed this to be:
-
- RExC_size += (1 + regarglen[op]);
-
- then it wouldn't matter. Its not clear what side effect
- might come from that so its not done so far.
- -- dmq
- */
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE_ARG(ptr, op, arg);
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, (ptr) - 2);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reganode",
- __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] ?
- "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Cur_Node_Offset;
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reguni - emit (if appropriate) a Unicode character
-*/
-STATIC STRLEN
-S_reguni(pTHX_ const RExC_state_t *pRExC_state, UV uv, char* s)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGUNI;
-
- return SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s);
-}
-
-/*
-- reginsert - insert an operator in front of already-emitted operand
-*
-* Means relocating the operand.
-*/
-STATIC void
-S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd, U32 depth)
-{
- dVAR;
- register regnode *src;
- register regnode *dst;
- register regnode *place;
- const int offset = regarglen[(U8)op];
- const int size = NODE_STEP_REGNODE + offset;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGINSERT;
- PERL_UNUSED_ARG(depth);
-/* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */
- DEBUG_PARSE_FMT("inst"," - %s",PL_reg_name[op]);
- if (SIZE_ONLY) {
- RExC_size += size;
- return;
- }
-
- src = RExC_emit;
- RExC_emit += size;
- dst = RExC_emit;
- if (RExC_open_parens) {
- int paren;
- /*DEBUG_PARSE_FMT("inst"," - %"IVdf, (IV)RExC_npar);*/
- for ( paren=0 ; paren < RExC_npar ; paren++ ) {
- if ( RExC_open_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("open"," - %d",size);*/
- RExC_open_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("open"," - %s","ok");*/
- }
- if ( RExC_close_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("close"," - %d",size);*/
- RExC_close_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("close"," - %s","ok");*/
- }
- }
- }
-
- while (src > opnd) {
- StructCopy(--src, --dst, regnode);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD 20010112 */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s copy %"UVuf" -> %"UVuf" (max %"UVuf").\n",
- "reg_insert",
- __LINE__,
- PL_reg_name[op],
- (UV)(dst - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(src - RExC_emit_start),
- (UV)(dst - RExC_emit_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src));
- Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src));
- }
-#endif
- }
-
-
- place = opnd; /* Op node, where operand used to be. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reginsert",
- __LINE__,
- PL_reg_name[op],
- (UV)(place - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(place - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(place, RExC_parse);
- Set_Node_Length(place, 1);
- }
-#endif
- src = NEXTOPER(place);
- FILL_ADVANCE_NODE(place, op);
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, (place) - 1);
- Zero(src, offset, regnode);
-}
-
-/*
-- regtail - set the next-pointer at the end of a node chain of p to val.
-- SEE ALSO: regtail_study
-*/
-/* TODO: All three parms should be const */
-STATIC void
-S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- if (SIZE_ONLY)
- return;
-
- /* Find last node. */
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tail" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) %s %s\n",
- SvPV_nolen_const(mysv), REG_NODE_NUM(scan),
- (temp == NULL ? "->" : ""),
- (temp == NULL ? PL_reg_name[OP(val)] : "")
- );
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
-
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-}
-
-#ifdef DEBUGGING
-/*
-- regtail_study - set the next-pointer at the end of a node chain of p to val.
-- Look for optimizable sequences at the same time.
-- currently only looks for EXACT chains.
-
-This is expermental code. The idea is to use this routine to perform
-in place optimizations on branches and groups as they are constructed,
-with the long term intention of removing optimization from study_chunk so
-that it is purely analytical.
-
-Currently only used when in DEBUG mode. The macro REGTAIL_STUDY() is used
-to control which is which.
-
-*/
-/* TODO: All four parms should be const */
-
-STATIC U8
-S_regtail_study(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- U8 exact = PSEUDO;
-#ifdef EXPERIMENTAL_INPLACESCAN
- I32 min = 0;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL_STUDY;
-
-
- if (SIZE_ONLY)
- return exact;
-
- /* Find last node. */
-
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (PL_regkind[OP(scan)] == EXACT)
- if (join_exact(pRExC_state,scan,&min,1,val,depth+1))
- return EXACT;
-#endif
- if ( exact ) {
- switch (OP(scan)) {
- case EXACT:
- case EXACTF:
- case EXACTFL:
- if( exact == PSEUDO )
- exact= OP(scan);
- else if ( exact != OP(scan) )
- exact= 0;
- case NOTHING:
- break;
- default:
- exact= 0;
- }
- }
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tsdy" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) -> %s\n",
- SvPV_nolen_const(mysv),
- REG_NODE_NUM(scan),
- PL_reg_name[exact]);
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
- DEBUG_PARSE_r({
- SV * const mysv_val=sv_newmortal();
- DEBUG_PARSE_MSG("");
- regprop(RExC_rx, mysv_val, val);
- PerlIO_printf(Perl_debug_log, "~ attach to %s (%"IVdf") offset to %"IVdf"\n",
- SvPV_nolen_const(mysv_val),
- (IV)REG_NODE_NUM(val),
- (IV)(val - scan)
- );
- });
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-
- return exact;
-}
-#endif
-
-/*
- - regcurly - a little FSA that accepts {\d+,?\d*}
- */
-STATIC I32
-S_regcurly(register const char *s)
-{
- PERL_ARGS_ASSERT_REGCURLY;
-
- if (*s++ != '{')
- return FALSE;
- if (!isDIGIT(*s))
- return FALSE;
- while (isDIGIT(*s))
- s++;
- if (*s == ',')
- s++;
- while (isDIGIT(*s))
- s++;
- if (*s != '}')
- return FALSE;
- return TRUE;
-}
-
-
-/*
- - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form
- */
-#ifdef DEBUGGING
-static void
-S_regdump_extflags(pTHX_ const char *lead, const U32 flags)
-{
- int bit;
- int set=0;
-
- for (bit=0; bit<32; bit++) {
- if (flags & (1<<bit)) {
- if (!set++ && lead)
- PerlIO_printf(Perl_debug_log, "%s",lead);
- PerlIO_printf(Perl_debug_log, "%s ",PL_reg_extflags_name[bit]);
- }
- }
- if (lead) {
- if (set)
- PerlIO_printf(Perl_debug_log, "\n");
- else
- PerlIO_printf(Perl_debug_log, "%s[none-set]\n",lead);
- }
-}
-#endif
-
-void
-Perl_regdump(pTHX_ const regexp *r)
-{
-#ifdef DEBUGGING
- dVAR;
- SV * const sv = sv_newmortal();
- SV *dsv= sv_newmortal();
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGDUMP;
-
- (void)dumpuntil(r, ri->program, ri->program + 1, NULL, NULL, sv, 0, 0);
-
- /* Header fields of interest. */
- if (r->anchored_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->anchored_substr),
- RE_SV_DUMPLEN(r->anchored_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_substr),
- (IV)r->anchored_offset);
- } else if (r->anchored_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->anchored_utf8),
- RE_SV_DUMPLEN(r->anchored_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored utf8 %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_utf8),
- (IV)r->anchored_offset);
- }
- if (r->float_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->float_substr),
- RE_SV_DUMPLEN(r->float_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "floating %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_substr),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- } else if (r->float_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->float_utf8),
- RE_SV_DUMPLEN(r->float_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "floating utf8 %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_utf8),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- }
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log,
- (const char *)
- (r->check_substr == r->float_substr
- && r->check_utf8 == r->float_utf8
- ? "(checking floating" : "(checking anchored"));
- if (r->extflags & RXf_NOSCAN)
- PerlIO_printf(Perl_debug_log, " noscan");
- if (r->extflags & RXf_CHECK_ALL)
- PerlIO_printf(Perl_debug_log, " isall");
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log, ") ");
-
- if (ri->regstclass) {
- regprop(r, sv, ri->regstclass);
- PerlIO_printf(Perl_debug_log, "stclass %s ", SvPVX_const(sv));
- }
- if (r->extflags & RXf_ANCH) {
- PerlIO_printf(Perl_debug_log, "anchored");
- if (r->extflags & RXf_ANCH_BOL)
- PerlIO_printf(Perl_debug_log, "(BOL)");
- if (r->extflags & RXf_ANCH_MBOL)
- PerlIO_printf(Perl_debug_log, "(MBOL)");
- if (r->extflags & RXf_ANCH_SBOL)
- PerlIO_printf(Perl_debug_log, "(SBOL)");
- if (r->extflags & RXf_ANCH_GPOS)
- PerlIO_printf(Perl_debug_log, "(GPOS)");
- PerlIO_putc(Perl_debug_log, ' ');
- }
- if (r->extflags & RXf_GPOS_SEEN)
- PerlIO_printf(Perl_debug_log, "GPOS:%"UVuf" ", (UV)r->gofs);
- if (r->intflags & PREGf_SKIP)
- PerlIO_printf(Perl_debug_log, "plus ");
- if (r->intflags & PREGf_IMPLICIT)
- PerlIO_printf(Perl_debug_log, "implicit ");
- PerlIO_printf(Perl_debug_log, "minlen %"IVdf" ", (IV)r->minlen);
- if (r->extflags & RXf_EVAL_SEEN)
- PerlIO_printf(Perl_debug_log, "with eval ");
- PerlIO_printf(Perl_debug_log, "\n");
- DEBUG_FLAGS_r(regdump_extflags("r->extflags: ",r->extflags));
-#else
- PERL_ARGS_ASSERT_REGDUMP;
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(r);
-#endif /* DEBUGGING */
-}
-
-/*
-- regprop - printable representation of opcode
-*/
-#define EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags) \
-STMT_START { \
- if (do_sep) { \
- Perl_sv_catpvf(aTHX_ sv,"%s][%s",PL_colors[1],PL_colors[0]); \
- if (flags & ANYOF_INVERT) \
- /*make sure the invert info is in each */ \
- sv_catpvs(sv, "^"); \
- do_sep = 0; \
- } \
-} STMT_END
-
-void
-Perl_regprop(pTHX_ const regexp *prog, SV *sv, const regnode *o)
-{
-#ifdef DEBUGGING
- dVAR;
- register int k;
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPROP;
-
- sv_setpvs(sv, "");
-
- if (OP(o) > REGNODE_MAX) /* regnode.type is unsigned */
- /* It would be nice to FAIL() here, but this may be called from
- regexec.c, and it would be hard to supply pRExC_state. */
- Perl_croak(aTHX_ "Corrupted regexp opcode %d > %d", (int)OP(o), (int)REGNODE_MAX);
- sv_catpv(sv, PL_reg_name[OP(o)]); /* Take off const! */
-
- k = PL_regkind[OP(o)];
-
- if (k == EXACT) {
- sv_catpvs(sv, " ");
- /* Using is_utf8_string() (via PERL_PV_UNI_DETECT)
- * is a crude hack but it may be the best for now since
- * we have no flag "this EXACTish node was UTF-8"
- * --jhi */
- pv_pretty(sv, STRING(o), STR_LEN(o), 60, PL_colors[0], PL_colors[1],
- PERL_PV_ESCAPE_UNI_DETECT |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT |
- PERL_PV_PRETTY_NOCLEAR
- );
- } else if (k == TRIE) {
- /* print the details of the trie in dumpuntil instead, as
- * progi->data isn't available here */
- const char op = OP(o);
- const U32 n = ARG(o);
- const reg_ac_data * const ac = IS_TRIE_AC(op) ?
- (reg_ac_data *)progi->data->data[n] :
- NULL;
- const reg_trie_data * const trie
- = (reg_trie_data*)progi->data->data[!IS_TRIE_AC(op) ? n : ac->trie];
-
- Perl_sv_catpvf(aTHX_ sv, "-%s",PL_reg_name[o->flags]);
- DEBUG_TRIE_COMPILE_r(
- Perl_sv_catpvf(aTHX_ sv,
- "<S:%"UVuf"/%"IVdf" W:%"UVuf" L:%"UVuf"/%"UVuf" C:%"UVuf"/%"UVuf">",
- (UV)trie->startstate,
- (IV)trie->statecount-1, /* -1 because of the unused 0 element */
- (UV)trie->wordcount,
- (UV)trie->minlen,
- (UV)trie->maxlen,
- (UV)TRIE_CHARCOUNT(trie),
- (UV)trie->uniquecharcount
- )
- );
- if ( IS_ANYOF_TRIE(op) || trie->bitmap ) {
- int i;
- int rangestart = -1;
- U8* bitmap = IS_ANYOF_TRIE(op) ? (U8*)ANYOF_BITMAP(o) : (U8*)TRIE_BITMAP(trie);
- sv_catpvs(sv, "[");
- for (i = 0; i <= 256; i++) {
- if (i < 256 && BITMAP_TEST(bitmap,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- rangestart = -1;
- }
- }
- sv_catpvs(sv, "]");
- }
-
- } else if (k == CURLY) {
- if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */
- Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o));
- }
- else if (k == WHILEM && o->flags) /* Ordinal/of */
- Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4);
- else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP || OP(o)==ACCEPT) {
- Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */
- if ( RXp_PAREN_NAMES(prog) ) {
- if ( k != REF || OP(o) < NREF) {
- AV *list= MUTABLE_AV(progi->data->data[progi->name_list_idx]);
- SV **name= av_fetch(list, ARG(o), 0 );
- if (name)
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- else {
- AV *list= MUTABLE_AV(progi->data->data[ progi->name_list_idx ]);
- SV *sv_dat= MUTABLE_SV(progi->data->data[ ARG( o ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
- SV **name= av_fetch(list, nums[0], 0 );
- I32 n;
- if (name) {
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- Perl_sv_catpvf(aTHX_ sv, "%s%"IVdf,
- (n ? "," : ""), (IV)nums[n]);
- }
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- }
- }
- } else if (k == GOSUB)
- Perl_sv_catpvf(aTHX_ sv, "%d[%+d]", (int)ARG(o),(int)ARG2L(o)); /* Paren and offset */
- else if (k == VERB) {
- if (!o->flags)
- Perl_sv_catpvf(aTHX_ sv, ":%"SVf,
- SVfARG((MUTABLE_SV(progi->data->data[ ARG( o ) ]))));
- } else if (k == LOGICAL)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */
- else if (k == FOLDCHAR)
- Perl_sv_catpvf(aTHX_ sv, "[0x%"UVXf"]", PTR2UV(ARG(o)) );
- else if (k == ANYOF) {
- int i, rangestart = -1;
- const U8 flags = ANYOF_FLAGS(o);
- int do_sep = 0;
-
- /* Should be synchronized with * ANYOF_ #xdefines in regcomp.h */
- static const char * const anyofs[] = {
- "\\w",
- "\\W",
- "\\s",
- "\\S",
- "\\d",
- "\\D",
- "[:alnum:]",
- "[:^alnum:]",
- "[:alpha:]",
- "[:^alpha:]",
- "[:ascii:]",
- "[:^ascii:]",
- "[:cntrl:]",
- "[:^cntrl:]",
- "[:graph:]",
- "[:^graph:]",
- "[:lower:]",
- "[:^lower:]",
- "[:print:]",
- "[:^print:]",
- "[:punct:]",
- "[:^punct:]",
- "[:upper:]",
- "[:^upper:]",
- "[:xdigit:]",
- "[:^xdigit:]",
- "[:space:]",
- "[:^space:]",
- "[:blank:]",
- "[:^blank:]"
- };
-
- if (flags & ANYOF_LOCALE)
- sv_catpvs(sv, "{loc}");
- if (flags & ANYOF_FOLD)
- sv_catpvs(sv, "{i}");
- Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]);
- if (flags & ANYOF_INVERT)
- sv_catpvs(sv, "^");
-
- /* output what the standard cp 0-255 bitmap matches */
- for (i = 0; i <= 256; i++) {
- if (i < 256 && ANYOF_BITMAP_TEST(o,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- do_sep = 1;
- rangestart = -1;
- }
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
- /* output any special charclass tests (used mostly under use locale) */
- if (o->flags & ANYOF_CLASS)
- for (i = 0; i < (int)(sizeof(anyofs)/sizeof(char*)); i++)
- if (ANYOF_CLASS_TEST(o,i)) {
- sv_catpv(sv, anyofs[i]);
- do_sep = 1;
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
-
- /* output information about the unicode matching */
- if (flags & ANYOF_UNICODE)
- sv_catpvs(sv, "{unicode}");
- else if (flags & ANYOF_UNICODE_ALL)
- sv_catpvs(sv, "{unicode_all}");
-
- {
- SV *lv;
- SV * const sw = regclass_swash(prog, o, FALSE, &lv, 0);
-
- if (lv) {
- if (sw) {
- U8 s[UTF8_MAXBYTES_CASE+1];
-
- for (i = 0; i <= 256; i++) { /* just the first 256 */
- uvchr_to_utf8(s, i);
-
- if (i < 256 && swash_fetch(sw, s, TRUE)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++) {
- const U8 * const e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for(p = s; p < e; p++)
- put_byte(sv, *p);
- }
- else {
- const U8 *e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- sv_catpvs(sv, "-");
- e = uvchr_to_utf8(s, i-1);
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- }
- rangestart = -1;
- }
- }
-
- sv_catpvs(sv, "..."); /* et cetera */
- }
-
- {
- char *s = savesvpv(lv);
- char * const origs = s;
-
- while (*s && *s != '\n')
- s++;
-
- if (*s == '\n') {
- const char * const t = ++s;
-
- while (*s) {
- if (*s == '\n')
- *s = ' ';
- s++;
- }
- if (s[-1] == ' ')
- s[-1] = 0;
-
- sv_catpv(sv, t);
- }
-
- Safefree(origs);
- }
- }
- }
-
- Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]);
- }
- else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH))
- Perl_sv_catpvf(aTHX_ sv, "[%d]", -(o->flags));
-#else
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(sv);
- PERL_UNUSED_ARG(o);
- PERL_UNUSED_ARG(prog);
-#endif /* DEBUGGING */
-}
-
-SV *
-Perl_re_intuit_string(pTHX_ REGEXP * const r)
-{ /* Assume that RE_INTUIT is set */
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_STRING;
- PERL_UNUSED_CONTEXT;
-
- DEBUG_COMPILE_r(
- {
- const char * const s = SvPV_nolen_const(prog->check_substr
- ? prog->check_substr : prog->check_utf8);
-
- if (!PL_colorset) reginitcolors();
- PerlIO_printf(Perl_debug_log,
- "%sUsing REx %ssubstr:%s \"%s%.60s%s%s\"\n",
- PL_colors[4],
- prog->check_substr ? "" : "utf8 ",
- PL_colors[5],PL_colors[0],
- s,
- PL_colors[1],
- (strlen(s) > 60 ? "..." : ""));
- } );
-
- return prog->check_substr ? prog->check_substr : prog->check_utf8;
-}
-
-/*
- pregfree()
-
- handles refcounting and freeing the perl core regexp structure. When
- it is necessary to actually free the structure the first thing it
- does is call the 'free' method of the regexp_engine associated to to
- the regexp, allowing the handling of the void *pprivate; member
- first. (This routine is not overridable by extensions, which is why
- the extensions free is called first.)
-
- See regdupe and regdupe_internal if you change anything here.
-*/
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_pregfree(pTHX_ REGEXP *r)
-{
- SvREFCNT_dec(r);
-}
-
-void
-Perl_pregfree2(pTHX_ REGEXP *rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_PREGFREE2;
-
- if (r->mother_re) {
- ReREFCNT_dec(r->mother_re);
- } else {
- CALLREGFREE_PVT(rx); /* free the private data */
- SvREFCNT_dec(RXp_PAREN_NAMES(r));
- }
- if (r->substrs) {
- SvREFCNT_dec(r->anchored_substr);
- SvREFCNT_dec(r->anchored_utf8);
- SvREFCNT_dec(r->float_substr);
- SvREFCNT_dec(r->float_utf8);
- Safefree(r->substrs);
- }
- RX_MATCH_COPY_FREE(rx);
-#ifdef PERL_OLD_COPY_ON_WRITE
- SvREFCNT_dec(r->saved_copy);
-#endif
- Safefree(r->offs);
-}
-
-/* reg_temp_copy()
-
- This is a hacky workaround to the structural issue of match results
- being stored in the regexp structure which is in turn stored in
- PL_curpm/PL_reg_curpm. The problem is that due to qr// the pattern
- could be PL_curpm in multiple contexts, and could require multiple
- result sets being associated with the pattern simultaneously, such
- as when doing a recursive match with (??{$qr})
-
- The solution is to make a lightweight copy of the regexp structure
- when a qr// is returned from the code executed by (??{$qr}) this
- lightweight copy doesnt actually own any of its data except for
- the starp/end and the actual regexp structure itself.
-
-*/
-
-
-REGEXP *
-Perl_reg_temp_copy (pTHX_ REGEXP *ret_x, REGEXP *rx)
-{
- struct regexp *ret;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- register const I32 npar = r->nparens+1;
-
- PERL_ARGS_ASSERT_REG_TEMP_COPY;
-
- if (!ret_x)
- ret_x = (REGEXP*) newSV_type(SVt_REGEXP);
- ret = (struct regexp *)SvANY(ret_x);
-
- (void)ReREFCNT_inc(rx);
- /* We can take advantage of the existing "copied buffer" mechanism in SVs
- by pointing directly at the buffer, but flagging that the allocated
- space in the copy is zero. As we've just done a struct copy, it's now
- a case of zero-ing that, rather than copying the current length. */
- SvPV_set(ret_x, RX_WRAPPED(rx));
- SvFLAGS(ret_x) |= SvFLAGS(rx) & (SVf_POK|SVp_POK|SVf_UTF8);
- memcpy(&(ret->xpv_cur), &(r->xpv_cur),
- sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur));
- SvLEN_set(ret_x, 0);
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if (r->substrs) {
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- SvREFCNT_inc_void(ret->anchored_substr);
- SvREFCNT_inc_void(ret->anchored_utf8);
- SvREFCNT_inc_void(ret->float_substr);
- SvREFCNT_inc_void(ret->float_utf8);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
- }
- RX_MATCH_COPIED_off(ret_x);
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
- ret->mother_re = rx;
-
- return ret_x;
-}
-#endif
-
-/* regfree_internal()
-
- Free the private data in a regexp. This is overloadable by
- extensions. Perl takes care of the regexp structure in pregfree(),
- this covers the *pprivate pointer which technically perldoesnt
- know about, however of course we have to handle the
- regexp_internal structure when no extension is in use.
-
- Note this is called before freeing anything in the regexp
- structure.
- */
-
-void
-Perl_regfree_internal(pTHX_ REGEXP * const rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGFREE_INTERNAL;
-
- DEBUG_COMPILE_r({
- if (!PL_colorset)
- reginitcolors();
- {
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RX_UTF8(rx),
- dsv, RX_PRECOMP(rx), RX_PRELEN(rx), 60);
- PerlIO_printf(Perl_debug_log,"%sFreeing REx:%s %s\n",
- PL_colors[4],PL_colors[5],s);
- }
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets)
- Safefree(ri->u.offsets); /* 20010421 MJD */
-#endif
- if (ri->data) {
- int n = ri->data->count;
- PAD* new_comppad = NULL;
- PAD* old_comppad;
- PADOFFSET refcnt;
-
- while (--n >= 0) {
- /* If you add a ->what type here, update the comment in regcomp.h */
- switch (ri->data->what[n]) {
- case 's':
- case 'S':
- case 'u':
- SvREFCNT_dec(MUTABLE_SV(ri->data->data[n]));
- break;
- case 'f':
- Safefree(ri->data->data[n]);
- break;
- case 'p':
- new_comppad = MUTABLE_AV(ri->data->data[n]);
- break;
- case 'o':
- if (new_comppad == NULL)
- Perl_croak(aTHX_ "panic: pregfree comppad");
- PAD_SAVE_LOCAL(old_comppad,
- /* Watch out for global destruction's random ordering. */
- (SvTYPE(new_comppad) == SVt_PVAV) ? new_comppad : NULL
- );
- OP_REFCNT_LOCK;
- refcnt = OpREFCNT_dec((OP_4tree*)ri->data->data[n]);
- OP_REFCNT_UNLOCK;
- if (!refcnt)
- op_free((OP_4tree*)ri->data->data[n]);
-
- PAD_RESTORE_LOCAL(old_comppad);
- SvREFCNT_dec(MUTABLE_SV(new_comppad));
- new_comppad = NULL;
- break;
- case 'n':
- break;
- case 'T':
- { /* Aho Corasick add-on structure for a trie node.
- Used in stclass optimization only */
- U32 refcount;
- reg_ac_data *aho=(reg_ac_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --aho->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(aho->states);
- PerlMemShared_free(aho->fail);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- PerlMemShared_free(ri->regstclass);
- }
- }
- break;
- case 't':
- {
- /* trie structure. */
- U32 refcount;
- reg_trie_data *trie=(reg_trie_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --trie->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(trie->charmap);
- PerlMemShared_free(trie->states);
- PerlMemShared_free(trie->trans);
- if (trie->bitmap)
- PerlMemShared_free(trie->bitmap);
- if (trie->wordlen)
- PerlMemShared_free(trie->wordlen);
- if (trie->jump)
- PerlMemShared_free(trie->jump);
- if (trie->nextword)
- PerlMemShared_free(trie->nextword);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- }
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: regfree data code '%c'", ri->data->what[n]);
- }
- }
- Safefree(ri->data->what);
- Safefree(ri->data);
- }
-
- Safefree(ri);
-}
-
-#define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
-#define av_dup_inc(s,t) MUTABLE_AV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define hv_dup_inc(s,t) MUTABLE_HV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define SAVEPVN(p,n) ((p) ? savepvn(p,n) : NULL)
-
-/*
- re_dup - duplicate a regexp.
-
- This routine is expected to clone a given regexp structure. It is only
- compiled under USE_ITHREADS.
-
- After all of the core data stored in struct regexp is duplicated
- the regexp_engine.dupe method is used to copy any private data
- stored in the *pprivate pointer. This allows extensions to handle
- any duplication it needs to do.
-
- See pregfree() and regfree_internal() if you change anything here.
-*/
-#if defined(USE_ITHREADS)
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_re_dup_guts(pTHX_ const REGEXP *sstr, REGEXP *dstr, CLONE_PARAMS *param)
-{
- dVAR;
- I32 npar;
- const struct regexp *r = (const struct regexp *)SvANY(sstr);
- struct regexp *ret = (struct regexp *)SvANY(dstr);
-
- PERL_ARGS_ASSERT_RE_DUP_GUTS;
-
- npar = r->nparens+1;
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if(ret->swap) {
- /* no need to copy these */
- Newx(ret->swap, npar, regexp_paren_pair);
- }
-
- if (ret->substrs) {
- /* Do it this way to avoid reading from *r after the StructCopy().
- That way, if any of the sv_dup_inc()s dislodge *r from the L1
- cache, it doesn't matter. */
- const bool anchored = r->check_substr
- ? r->check_substr == r->anchored_substr
- : r->check_utf8 == r->anchored_utf8;
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- ret->anchored_substr = sv_dup_inc(ret->anchored_substr, param);
- ret->anchored_utf8 = sv_dup_inc(ret->anchored_utf8, param);
- ret->float_substr = sv_dup_inc(ret->float_substr, param);
- ret->float_utf8 = sv_dup_inc(ret->float_utf8, param);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
-
- if (ret->check_substr) {
- if (anchored) {
- assert(r->check_utf8 == r->anchored_utf8);
- ret->check_substr = ret->anchored_substr;
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- assert(r->check_substr == r->float_substr);
- assert(r->check_utf8 == r->float_utf8);
- ret->check_substr = ret->float_substr;
- ret->check_utf8 = ret->float_utf8;
- }
- } else if (ret->check_utf8) {
- if (anchored) {
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- ret->check_utf8 = ret->float_utf8;
- }
- }
- }
-
- RXp_PAREN_NAMES(ret) = hv_dup_inc(RXp_PAREN_NAMES(ret), param);
-
- if (ret->pprivate)
- RXi_SET(ret,CALLREGDUPE_PVT(dstr,param));
-
- if (RX_MATCH_COPIED(dstr))
- ret->subbeg = SAVEPVN(ret->subbeg, ret->sublen);
- else
- ret->subbeg = NULL;
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
-
- if (ret->mother_re) {
- if (SvPVX_const(dstr) == SvPVX_const(ret->mother_re)) {
- /* Our storage points directly to our mother regexp, but that's
- 1: a buffer in a different thread
- 2: something we no longer hold a reference on
- so we need to copy it locally. */
- /* Note we need to sue SvCUR() on our mother_re, because it, in
- turn, may well be pointing to its own mother_re. */
- SvPV_set(dstr, SAVEPVN(SvPVX_const(ret->mother_re),
- SvCUR(ret->mother_re)+1));
- SvLEN_set(dstr, SvCUR(ret->mother_re)+1);
- }
- ret->mother_re = NULL;
- }
- ret->gofs = 0;
-}
-#endif /* PERL_IN_XSUB_RE */
-
-/*
- regdupe_internal()
-
- This is the internal complement to regdupe() which is used to copy
- the structure pointed to by the *pprivate pointer in the regexp.
- This is the core version of the extension overridable cloning hook.
- The regexp structure being duplicated will be copied by perl prior
- to this and will be provided as the regexp *r argument, however
- with the /old/ structures pprivate pointer value. Thus this routine
- may override any copying normally done by perl.
-
- It returns a pointer to the new regexp_internal structure.
-*/
-
-void *
-Perl_regdupe_internal(pTHX_ REGEXP * const rx, CLONE_PARAMS *param)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- regexp_internal *reti;
- int len, npar;
- RXi_GET_DECL(r,ri);
-
- PERL_ARGS_ASSERT_REGDUPE_INTERNAL;
-
- npar = r->nparens+1;
- len = ProgLen(ri);
-
- Newxc(reti, sizeof(regexp_internal) + len*sizeof(regnode), char, regexp_internal);
- Copy(ri->program, reti->program, len+1, regnode);
-
-
- reti->regstclass = NULL;
-
- if (ri->data) {
- struct reg_data *d;
- const int count = ri->data->count;
- int i;
-
- Newxc(d, sizeof(struct reg_data) + count*sizeof(void *),
- char, struct reg_data);
- Newx(d->what, count, U8);
-
- d->count = count;
- for (i = 0; i < count; i++) {
- d->what[i] = ri->data->what[i];
- switch (d->what[i]) {
- /* legal options are one of: sSfpontTu
- see also regcomp.h and pregfree() */
- case 's':
- case 'S':
- case 'p': /* actually an AV, but the dup function is identical. */
- case 'u': /* actually an HV, but the dup function is identical. */
- d->data[i] = sv_dup_inc((const SV *)ri->data->data[i], param);
- break;
- case 'f':
- /* This is cheating. */
- Newx(d->data[i], 1, struct regnode_charclass_class);
- StructCopy(ri->data->data[i], d->data[i],
- struct regnode_charclass_class);
- reti->regstclass = (regnode*)d->data[i];
- break;
- case 'o':
- /* Compiled op trees are readonly and in shared memory,
- and can thus be shared without duplication. */
- OP_REFCNT_LOCK;
- d->data[i] = (void*)OpREFCNT_inc((OP*)ri->data->data[i]);
- OP_REFCNT_UNLOCK;
- break;
- case 'T':
- /* Trie stclasses are readonly and can thus be shared
- * without duplication. We free the stclass in pregfree
- * when the corresponding reg_ac_data struct is freed.
- */
- reti->regstclass= ri->regstclass;
- /* Fall through */
- case 't':
- OP_REFCNT_LOCK;
- ((reg_trie_data*)ri->data->data[i])->refcount++;
- OP_REFCNT_UNLOCK;
- /* Fall through */
- case 'n':
- d->data[i] = ri->data->data[i];
- break;
- default:
- Perl_croak(aTHX_ "panic: re_dup unknown data code '%c'", ri->data->what[i]);
- }
- }
-
- reti->data = d;
- }
- else
- reti->data = NULL;
-
- reti->name_list_idx = ri->name_list_idx;
-
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets) {
- Newx(reti->u.offsets, 2*len+1, U32);
- Copy(ri->u.offsets, reti->u.offsets, 2*len+1, U32);
- }
-#else
- SetProgLen(reti,len);
-#endif
-
- return (void*)reti;
-}
-
-#endif /* USE_ITHREADS */
-
-#ifndef PERL_IN_XSUB_RE
-
-/*
- - regnext - dig the "next" pointer out of a node
- */
-regnode *
-Perl_regnext(pTHX_ register regnode *p)
-{
- dVAR;
- register I32 offset;
-
- if (!p)
- return(NULL);
-
- offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p));
- if (offset == 0)
- return(NULL);
-
- return(p+offset);
-}
-#endif
-
-STATIC void
-S_re_croak2(pTHX_ const char* pat1,const char* pat2,...)
-{
- va_list args;
- STRLEN l1 = strlen(pat1);
- STRLEN l2 = strlen(pat2);
- char buf[512];
- SV *msv;
- const char *message;
-
- PERL_ARGS_ASSERT_RE_CROAK2;
-
- if (l1 > 510)
- l1 = 510;
- if (l1 + l2 > 510)
- l2 = 510 - l1;
- Copy(pat1, buf, l1 , char);
- Copy(pat2, buf + l1, l2 , char);
- buf[l1 + l2] = '\n';
- buf[l1 + l2 + 1] = '\0';
-#ifdef I_STDARG
- /* ANSI variant takes additional second argument */
- va_start(args, pat2);
-#else
- va_start(args);
-#endif
- msv = vmess(buf, &args);
- va_end(args);
- message = SvPV_const(msv,l1);
- if (l1 > 512)
- l1 = 512;
- Copy(message, buf, l1 , char);
- buf[l1-1] = '\0'; /* Overwrite \n */
- Perl_croak(aTHX_ "%s", buf);
-}
-
-/* XXX Here's a total kludge. But we need to re-enter for swash routines. */
-
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_save_re_context(pTHX)
-{
- dVAR;
-
- struct re_save_state *state;
-
- SAVEVPTR(PL_curcop);
- SSGROW(SAVESTACK_ALLOC_FOR_RE_SAVE_STATE + 1);
-
- state = (struct re_save_state *)(PL_savestack + PL_savestack_ix);
- PL_savestack_ix += SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
- SSPUSHINT(SAVEt_RE_STATE);
-
- Copy(&PL_reg_state, state, 1, struct re_save_state);
-
- PL_reg_start_tmp = 0;
- PL_reg_start_tmpl = 0;
- PL_reg_oldsaved = NULL;
- PL_reg_oldsavedlen = 0;
- PL_reg_maxiter = 0;
- PL_reg_leftiter = 0;
- PL_reg_poscache = NULL;
- PL_reg_poscache_size = 0;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = NULL;
-#endif
-
- /* Save $1..$n (#18107: UTF-8 s/(\w+)/uc($1)/e); AMS 20021106. */
- if (PL_curpm) {
- const REGEXP * const rx = PM_GETRE(PL_curpm);
- if (rx) {
- U32 i;
- for (i = 1; i <= RX_NPARENS(rx); i++) {
- char digits[TYPE_CHARS(long)];
- const STRLEN len = my_snprintf(digits, sizeof(digits), "%lu", (long)i);
- GV *const *const gvp
- = (GV**)hv_fetch(PL_defstash, digits, len, 0);
-
- if (gvp) {
- GV * const gv = *gvp;
- if (SvTYPE(gv) == SVt_PVGV && GvSV(gv))
- save_scalar(gv);
- }
- }
- }
- }
-}
-#endif
-
-static void
-clear_re(pTHX_ void *r)
-{
- dVAR;
- ReREFCNT_dec((REGEXP *)r);
-}
-
-#ifdef DEBUGGING
-
-STATIC void
-S_put_byte(pTHX_ SV *sv, int c)
-{
- PERL_ARGS_ASSERT_PUT_BYTE;
-
- /* Our definition of isPRINT() ignores locales, so only bytes that are
- not part of UTF-8 are considered printable. I assume that the same
- holds for UTF-EBCDIC.
- Also, code point 255 is not printable in either (it's E0 in EBCDIC,
- which Wikipedia says:
-
- EO, or Eight Ones, is an 8-bit EBCDIC character code represented as all
- ones (binary 1111 1111, hexadecimal FF). It is similar, but not
- identical, to the ASCII delete (DEL) or rubout control character.
- ) So the old condition can be simplified to !isPRINT(c) */
- if (!isPRINT(c))
- Perl_sv_catpvf(aTHX_ sv, "\\%o", c);
- else {
- const char string = c;
- if (c == '-' || c == ']' || c == '\\' || c == '^')
- sv_catpvs(sv, "\\");
- sv_catpvn(sv, &string, 1);
- }
-}
-
-
-#define CLEAR_OPTSTART \
- if (optstart) STMT_START { \
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log, " (%"IVdf" nodes)\n", (IV)(node - optstart))); \
- optstart=NULL; \
- } STMT_END
-
-#define DUMPUNTIL(b,e) CLEAR_OPTSTART; node=dumpuntil(r,start,(b),(e),last,sv,indent+1,depth+1);
-
-STATIC const regnode *
-S_dumpuntil(pTHX_ const regexp *r, const regnode *start, const regnode *node,
- const regnode *last, const regnode *plast,
- SV* sv, I32 indent, U32 depth)
-{
- dVAR;
- register U8 op = PSEUDO; /* Arbitrary non-END op. */
- register const regnode *next;
- const regnode *optstart= NULL;
-
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMPUNTIL;
-
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d : %d - %d - %d\n",indent,node-start,
- last ? last-start : 0,plast ? plast-start : 0);
-#endif
-
- if (plast && plast < last)
- last= plast;
-
- while (PL_regkind[op] != END && (!last || node < last)) {
- /* While that wasn't END last time... */
- NODE_ALIGN(node);
- op = OP(node);
- if (op == CLOSE || op == WHILEM)
- indent--;
- next = regnext((regnode *)node);
-
- /* Where, what. */
- if (OP(node) == OPTIMIZED) {
- if (!optstart && RE_DEBUG_FLAG(RE_DEBUG_COMPILE_OPTIMISE))
- optstart = node;
- else
- goto after_print;
- } else
- CLEAR_OPTSTART;
-
- regprop(r, sv, node);
- PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start),
- (int)(2*indent + 1), "", SvPVX_const(sv));
-
- if (OP(node) != OPTIMIZED) {
- if (next == NULL) /* Next ptr. */
- PerlIO_printf(Perl_debug_log, " (0)");
- else if (PL_regkind[(U8)op] == BRANCH && PL_regkind[OP(next)] != BRANCH )
- PerlIO_printf(Perl_debug_log, " (FAIL)");
- else
- PerlIO_printf(Perl_debug_log, " (%"IVdf")", (IV)(next - start));
- (void)PerlIO_putc(Perl_debug_log, '\n');
- }
-
- after_print:
- if (PL_regkind[(U8)op] == BRANCHJ) {
- assert(next);
- {
- register const regnode *nnode = (OP(next) == LONGJMP
- ? regnext((regnode *)next)
- : next);
- if (last && nnode > last)
- nnode = last;
- DUMPUNTIL(NEXTOPER(NEXTOPER(node)), nnode);
- }
- }
- else if (PL_regkind[(U8)op] == BRANCH) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node), next);
- }
- else if ( PL_regkind[(U8)op] == TRIE ) {
- const regnode *this_trie = node;
- const char op = OP(node);
- const U32 n = ARG(node);
- const reg_ac_data * const ac = op>=AHOCORASICK ?
- (reg_ac_data *)ri->data->data[n] :
- NULL;
- const reg_trie_data * const trie =
- (reg_trie_data*)ri->data->data[op<AHOCORASICK ? n : ac->trie];
-#ifdef DEBUGGING
- AV *const trie_words = MUTABLE_AV(ri->data->data[n + TRIE_WORDS_OFFSET]);
-#endif
- const regnode *nextbranch= NULL;
- I32 word_idx;
- sv_setpvs(sv, "");
- for (word_idx= 0; word_idx < (I32)trie->wordcount; word_idx++) {
- SV ** const elem_ptr = av_fetch(trie_words,word_idx,0);
-
- PerlIO_printf(Perl_debug_log, "%*s%s ",
- (int)(2*(indent+3)), "",
- elem_ptr ? pv_pretty(sv, SvPV_nolen_const(*elem_ptr), SvCUR(*elem_ptr), 60,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*elem_ptr) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT
- )
- : "???"
- );
- if (trie->jump) {
- U16 dist= trie->jump[word_idx+1];
- PerlIO_printf(Perl_debug_log, "(%"UVuf")\n",
- (UV)((dist ? this_trie + dist : next) - start));
- if (dist) {
- if (!nextbranch)
- nextbranch= this_trie + trie->jump[0];
- DUMPUNTIL(this_trie + dist, nextbranch);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode *)nextbranch);
- } else {
- PerlIO_printf(Perl_debug_log, "\n");
- }
- }
- if (last && next > last)
- node= last;
- else
- node= next;
- }
- else if ( op == CURLY ) { /* "next" might be very big: optimizer */
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS,
- NEXTOPER(node) + EXTRA_STEP_2ARGS + 1);
- }
- else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, next);
- }
- else if ( op == PLUS || op == STAR) {
- DUMPUNTIL(NEXTOPER(node), NEXTOPER(node) + 1);
- }
- else if (op == ANYOF) {
- /* arglen 1 + class block */
- node += 1 + ((ANYOF_FLAGS(node) & ANYOF_LARGE)
- ? ANYOF_CLASS_SKIP : ANYOF_SKIP);
- node = NEXTOPER(node);
- }
- else if (PL_regkind[(U8)op] == EXACT) {
- /* Literal string, where present. */
- node += NODE_SZ_STR(node) - 1;
- node = NEXTOPER(node);
- }
- else {
- node = NEXTOPER(node);
- node += regarglen[(U8)op];
- }
- if (op == CURLYX || op == OPEN)
- indent++;
- }
- CLEAR_OPTSTART;
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d\n", (int)indent);
-#endif
- return node;
-}
-
-#endif /* DEBUGGING */
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regexec.c
- */
-
-/*
- * One Ring to rule them all, One Ring to find them
- &
- * [p.v of _The Lord of the Rings_, opening poem]
- * [p.50 of _The Lord of the Rings_, I/iii: "The Shadow of the Past"]
- * [p.254 of _The Lord of the Rings_, II/ii: "The Council of Elrond"]
- */
-
-/* This file contains functions for executing a regular expression. See
- * also regcomp.c which funnily enough, contains functions for compiling
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_exec.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGEXEC_C
-#include "perl.h"
-#include "re_defs.h"
-
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#define RF_tainted 1 /* tainted information used? */
-#define RF_warned 2 /* warned about big count? */
-
-#define RF_utf8 8 /* Pattern contains multibyte chars? */
-
-#define UTF ((PL_reg_flags & RF_utf8) != 0)
-
-#define RS_init 1 /* eval environment created */
-#define RS_set 2 /* replsv value is set */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-#define REGINCLASS(prog,p,c) (ANYOF_FLAGS(p) ? reginclass(prog,p,c,0,0) : ANYOF_BITMAP_TEST(p,*(c)))
-
-/*
- * Forwards.
- */
-
-#define CHR_SVLEN(sv) (do_utf8 ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (PL_reg_match_utf8 ? utf8_distance(a,b) : a - b)
-
-#define HOPc(pos,off) \
- (char *)(PL_reg_match_utf8 \
- ? reghop3((U8*)pos, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)) \
- : (U8*)(pos + off))
-#define HOPBACKc(pos, off) \
- (char*)(PL_reg_match_utf8\
- ? reghopmaybe3((U8*)pos, -off, (U8*)PL_bostr) \
- : (pos - off >= PL_bostr) \
- ? (U8*)pos - off \
- : NULL)
-
-#define HOP3(pos,off,lim) (PL_reg_match_utf8 ? reghop3((U8*)(pos), off, (U8*)(lim)) : (U8*)(pos + off))
-#define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim))
-
-/* these are unrolled below in the CCC_TRY_XXX defined */
-#define LOAD_UTF8_CHARCLASS(class,str) STMT_START { \
- if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)str); assert(ok); LEAVE; } } STMT_END
-
-/* Doesn't do an assert to verify that is correct */
-#define LOAD_UTF8_CHARCLASS_NO_CHECK(class) STMT_START { \
- if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)" "); LEAVE; } } STMT_END
-
-#define LOAD_UTF8_CHARCLASS_ALNUM() LOAD_UTF8_CHARCLASS(alnum,"a")
-#define LOAD_UTF8_CHARCLASS_DIGIT() LOAD_UTF8_CHARCLASS(digit,"0")
-#define LOAD_UTF8_CHARCLASS_SPACE() LOAD_UTF8_CHARCLASS(space," ")
-
-#define LOAD_UTF8_CHARCLASS_GCB() /* Grapheme cluster boundaries */ \
- LOAD_UTF8_CHARCLASS(X_begin, " "); \
- LOAD_UTF8_CHARCLASS(X_non_hangul, "A"); \
- /* These are utf8 constants, and not utf-ebcdic constants, so the \
- * assert should likely and hopefully fail on an EBCDIC machine */ \
- LOAD_UTF8_CHARCLASS(X_extend, "\xcc\x80"); /* U+0300 */ \
- \
- /* No asserts are done for these, in case called on an early \
- * Unicode version in which they map to nothing */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_prepend);/* U+0E40 "\xe0\xb9\x80" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_L); /* U+1100 "\xe1\x84\x80" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_LV); /* U+AC00 "\xea\xb0\x80" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_LVT); /* U+AC01 "\xea\xb0\x81" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_LV_LVT_V);/* U+AC01 "\xea\xb0\x81" */\
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_T); /* U+11A8 "\xe1\x86\xa8" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_V) /* U+1160 "\xe1\x85\xa0" */
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS_ALNUM()
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS_SPACE()
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS_DIGIT()
-#define RE_utf8_perl_word PL_utf8_alnum
-#define RE_utf8_perl_space PL_utf8_space
-#define RE_utf8_posix_digit PL_utf8_digit
-#define perl_word alnum
-#define perl_space space
-#define posix_digit digit
-#else
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS(perl_word,"a")
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS(perl_space," ")
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS(posix_digit,"0")
-#define RE_utf8_perl_word PL_utf8_perl_word
-#define RE_utf8_perl_space PL_utf8_perl_space
-#define RE_utf8_posix_digit PL_utf8_posix_digit
-#endif
-
-
-#define CCC_TRY_AFF(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME: \
- if (!nextchr) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if (!(OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if (!(OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-#define CCC_TRY_NEG(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME : \
- if (!nextchr && locinput >= PL_regeol) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if ((OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if ((OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-
-
-
-
-/* TODO: Combine JUMPABLE and HAS_TEXT to cache OP(rn) */
-
-/* for use after a quantifier and before an EXACT-like node -- japhy */
-/* it would be nice to rework regcomp.sym to generate this stuff. sigh */
-#define JUMPABLE(rn) ( \
- OP(rn) == OPEN || \
- (OP(rn) == CLOSE && (!cur_eval || cur_eval->u.eval.close_paren != ARG(rn))) || \
- OP(rn) == EVAL || \
- OP(rn) == SUSPEND || OP(rn) == IFMATCH || \
- OP(rn) == PLUS || OP(rn) == MINMOD || \
- OP(rn) == KEEPS || (PL_regkind[OP(rn)] == VERB) || \
- (PL_regkind[OP(rn)] == CURLY && ARG1(rn) > 0) \
-)
-#define IS_EXACT(rn) (PL_regkind[OP(rn)] == EXACT)
-
-#define HAS_TEXT(rn) ( IS_EXACT(rn) || PL_regkind[OP(rn)] == REF )
-
-#if 0
-/* Currently these are only used when PL_regkind[OP(rn)] == EXACT so
- we don't need this definition. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT || OP(rn)==REF || OP(rn)==NREF )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF || OP(rn)==REFF || OP(rn)==NREFF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL || OP(rn)==REFFL || OP(rn)==NREFFL )
-
-#else
-/* ... so we use this as its faster. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL )
-
-#endif
-
-/*
- Search for mandatory following text node; for lookahead, the text must
- follow but for lookbehind (rn->flags != 0) we skip to the next step.
-*/
-#define FIND_NEXT_IMPT(rn) STMT_START { \
- while (JUMPABLE(rn)) { \
- const OPCODE type = OP(rn); \
- if (type == SUSPEND || PL_regkind[type] == CURLY) \
- rn = NEXTOPER(NEXTOPER(rn)); \
- else if (type == PLUS) \
- rn = NEXTOPER(rn); \
- else if (type == IFMATCH) \
- rn = (rn->flags == 0) ? NEXTOPER(NEXTOPER(rn)) : rn + ARG(rn); \
- else rn += NEXT_OFF(rn); \
- } \
-} STMT_END
-
-
-static void restore_pos(pTHX_ void *arg);
-
-STATIC CHECKPOINT
-S_regcppush(pTHX_ I32 parenfloor)
-{
- dVAR;
- const int retval = PL_savestack_ix;
-#define REGCP_PAREN_ELEMS 4
- const int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS;
- int p;
- GET_RE_DEBUG_FLAGS_DECL;
-
- if (paren_elems_to_push < 0)
- Perl_croak(aTHX_ "panic: paren_elems_to_push < 0");
-
-#define REGCP_OTHER_ELEMS 7
- SSGROW(paren_elems_to_push + REGCP_OTHER_ELEMS);
-
- for (p = PL_regsize; p > parenfloor; p--) {
-/* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */
- SSPUSHINT(PL_regoffs[p].end);
- SSPUSHINT(PL_regoffs[p].start);
- SSPUSHPTR(PL_reg_start_tmp[p]);
- SSPUSHINT(p);
- DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log,
- " saving \\%"UVuf" %"IVdf"(%"IVdf")..%"IVdf"\n",
- (UV)p, (IV)PL_regoffs[p].start,
- (IV)(PL_reg_start_tmp[p] - PL_bostr),
- (IV)PL_regoffs[p].end
- ));
- }
-/* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */
- SSPUSHPTR(PL_regoffs);
- SSPUSHINT(PL_regsize);
- SSPUSHINT(*PL_reglastparen);
- SSPUSHINT(*PL_reglastcloseparen);
- SSPUSHPTR(PL_reginput);
-#define REGCP_FRAME_ELEMS 2
-/* REGCP_FRAME_ELEMS are part of the REGCP_OTHER_ELEMS and
- * are needed for the regexp context stack bookkeeping. */
- SSPUSHINT(paren_elems_to_push + REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- SSPUSHINT(SAVEt_REGCONTEXT); /* Magic cookie. */
-
- return retval;
-}
-
-/* These are needed since we do not localize EVAL nodes: */
-#define REGCP_SET(cp) \
- DEBUG_STATE_r( \
- PerlIO_printf(Perl_debug_log, \
- " Setting an EVAL scope, savestack=%"IVdf"\n", \
- (IV)PL_savestack_ix)); \
- cp = PL_savestack_ix
-
-#define REGCP_UNWIND(cp) \
- DEBUG_STATE_r( \
- if (cp != PL_savestack_ix) \
- PerlIO_printf(Perl_debug_log, \
- " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \
- (IV)(cp), (IV)PL_savestack_ix)); \
- regcpblow(cp)
-
-STATIC char *
-S_regcppop(pTHX_ const regexp *rex)
-{
- dVAR;
- U32 i;
- char *input;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCPPOP;
-
- /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */
- i = SSPOPINT;
- assert(i == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */
- i = SSPOPINT; /* Parentheses elements to pop. */
- input = (char *) SSPOPPTR;
- *PL_reglastcloseparen = SSPOPINT;
- *PL_reglastparen = SSPOPINT;
- PL_regsize = SSPOPINT;
- PL_regoffs=(regexp_paren_pair *) SSPOPPTR;
-
-
- /* Now restore the parentheses context. */
- for (i -= (REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- i > 0; i -= REGCP_PAREN_ELEMS) {
- I32 tmps;
- U32 paren = (U32)SSPOPINT;
- PL_reg_start_tmp[paren] = (char *) SSPOPPTR;
- PL_regoffs[paren].start = SSPOPINT;
- tmps = SSPOPINT;
- if (paren <= *PL_reglastparen)
- PL_regoffs[paren].end = tmps;
- DEBUG_BUFFERS_r(
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n",
- (UV)paren, (IV)PL_regoffs[paren].start,
- (IV)(PL_reg_start_tmp[paren] - PL_bostr),
- (IV)PL_regoffs[paren].end,
- (paren > *PL_reglastparen ? "(no)" : ""));
- );
- }
- DEBUG_BUFFERS_r(
- if (*PL_reglastparen + 1 <= rex->nparens) {
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"IVdf"..\\%"IVdf" to undef\n",
- (IV)(*PL_reglastparen + 1), (IV)rex->nparens);
- }
- );
-#if 1
- /* It would seem that the similar code in regtry()
- * already takes care of this, and in fact it is in
- * a better location to since this code can #if 0-ed out
- * but the code in regtry() is needed or otherwise tests
- * requiring null fields (pat.t#187 and split.t#{13,14}
- * (as of patchlevel 7877) will fail. Then again,
- * this code seems to be necessary or otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * --jhi updated by dapm */
- for (i = *PL_reglastparen + 1; i <= rex->nparens; i++) {
- if (i > PL_regsize)
- PL_regoffs[i].start = -1;
- PL_regoffs[i].end = -1;
- }
-#endif
- return input;
-}
-
-#define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */
-
-/*
- * pregexec and friends
- */
-
-#ifndef PERL_IN_XSUB_RE
-/*
- - pregexec - match a regexp against a string
- */
-I32
-Perl_pregexec(pTHX_ REGEXP * const prog, char* stringarg, register char *strend,
- char *strbeg, I32 minend, SV *screamer, U32 nosave)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* nosave: For optimizations. */
-{
- PERL_ARGS_ASSERT_PREGEXEC;
-
- return
- regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL,
- nosave ? 0 : REXEC_COPY_STR);
-}
-#endif
-
-/*
- * Need to implement the following flags for reg_anch:
- *
- * USE_INTUIT_NOML - Useful to call re_intuit_start() first
- * USE_INTUIT_ML
- * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer
- * INTUIT_AUTORITATIVE_ML
- * INTUIT_ONCE_NOML - Intuit can match in one location only.
- * INTUIT_ONCE_ML
- *
- * Another flag for this function: SECOND_TIME (so that float substrs
- * with giant delta may be not rechecked).
- */
-
-/* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */
-
-/* If SCREAM, then SvPVX_const(sv) should be compatible with strpos and strend.
- Otherwise, only SvCUR(sv) is used to get strbeg. */
-
-/* XXXX We assume that strpos is strbeg unless sv. */
-
-/* XXXX Some places assume that there is a fixed substring.
- An update may be needed if optimizer marks as "INTUITable"
- RExen without fixed substrings. Similarly, it is assumed that
- lengths of all the strings are no more than minlen, thus they
- cannot come from lookahead.
- (Or minlen should take into account lookahead.)
- NOTE: Some of this comment is not correct. minlen does now take account
- of lookahead/behind. Further research is required. -- demerphq
-
-*/
-
-/* A failure to find a constant substring means that there is no need to make
- an expensive call to REx engine, thus we celebrate a failure. Similarly,
- finding a substring too deep into the string means that less calls to
- regtry() should be needed.
-
- REx compiler's optimizer found 4 possible hints:
- a) Anchored substring;
- b) Fixed substring;
- c) Whether we are anchored (beginning-of-line or \G);
- d) First node (of those at offset 0) which may distingush positions;
- We use a)b)d) and multiline-part of c), and try to find a position in the
- string which does not contradict any of them.
- */
-
-/* Most of decisions we do here should have been done at compile time.
- The nodes of the REx which we used for the search should have been
- deleted from the finite automaton. */
-
-char *
-Perl_re_intuit_start(pTHX_ REGEXP * const rx, SV *sv, char *strpos,
- char *strend, const U32 flags, re_scream_pos_data *data)
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- register I32 start_shift = 0;
- /* Should be nonnegative! */
- register I32 end_shift = 0;
- register char *s;
- register SV *check;
- char *strbeg;
- char *t;
- const bool do_utf8 = (sv && SvUTF8(sv)) ? 1 : 0; /* if no sv we have to assume bytes */
- I32 ml_anch;
- register char *other_last = NULL; /* other substr checked before this */
- char *check_at = NULL; /* check substr found at this pos */
- const I32 multiline = prog->extflags & RXf_PMf_MULTILINE;
- RXi_GET_DECL(prog,progi);
-#ifdef DEBUGGING
- const char * const i_strpos = strpos;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_START;
-
- RX_MATCH_UTF8_set(rx,do_utf8);
-
- if (RX_UTF8(rx)) {
- PL_reg_flags |= RF_utf8;
- }
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, strpos, strend,
- sv ? "Guessing start of match in sv for"
- : "Guessing start of match in string for");
- );
-
- /* CHR_DIST() would be more correct here but it makes things slow. */
- if (prog->minlen > strend - strpos) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short... [re_intuit_start]\n"));
- goto fail;
- }
-
- strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos;
- PL_regeol = strend;
- if (do_utf8) {
- if (!prog->check_utf8 && prog->check_substr)
- to_utf8_substr(prog);
- check = prog->check_utf8;
- } else {
- if (!prog->check_substr && prog->check_utf8)
- to_byte_substr(prog);
- check = prog->check_substr;
- }
- if (check == &PL_sv_undef) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Non-utf8 string cannot match utf8 check string\n"));
- goto fail;
- }
- if (prog->extflags & RXf_ANCH) { /* Match at beg-of-str or after \n */
- ml_anch = !( (prog->extflags & RXf_ANCH_SINGLE)
- || ( (prog->extflags & RXf_ANCH_BOL)
- && !multiline ) ); /* Check after \n? */
-
- if (!ml_anch) {
- if ( !(prog->extflags & RXf_ANCH_GPOS) /* Checked by the caller */
- && !(prog->intflags & PREGf_IMPLICIT) /* not a real BOL */
- /* SvCUR is not set on references: SvRV and SvPVX_const overlap */
- && sv && !SvROK(sv)
- && (strpos != strbeg)) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not at start...\n"));
- goto fail;
- }
- if (prog->check_offset_min == prog->check_offset_max &&
- !(prog->extflags & RXf_CANY_SEEN)) {
- /* Substring at constant offset from beg-of-str... */
- I32 slen;
-
- s = HOP3c(strpos, prog->check_offset_min, strend);
-
- if (SvTAIL(check)) {
- slen = SvCUR(check); /* >= 1 */
-
- if ( strend - s > slen || strend - s < slen - 1
- || (strend - s == slen && strend[-1] != '\n')) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String too long...\n"));
- goto fail_finish;
- }
- /* Now should match s[0..slen-2] */
- slen--;
- if (slen && (*SvPVX_const(check) != *s
- || (slen > 1
- && memNE(SvPVX_const(check), s, slen)))) {
- report_neq:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String not equal...\n"));
- goto fail_finish;
- }
- }
- else if (*SvPVX_const(check) != *s
- || ((slen = SvCUR(check)) > 1
- && memNE(SvPVX_const(check), s, slen)))
- goto report_neq;
- check_at = s;
- goto success_at_start;
- }
- }
- /* Match is anchored, but substr is not anchored wrt beg-of-str. */
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- if (!ml_anch) {
- const I32 end = prog->check_offset_max + CHR_SVLEN(check)
- - (SvTAIL(check) != 0);
- const I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end;
-
- if (end_shift < eshift)
- end_shift = eshift;
- }
- }
- else { /* Can match at random position */
- ml_anch = 0;
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- /* end shift should be non negative here */
- }
-
-#ifdef QDEBUGGING /* 7/99: reports of failure (with the older version) */
- if (end_shift < 0)
- Perl_croak(aTHX_ "panic: end_shift: %"IVdf" pattern:\n%s\n ",
- (IV)end_shift, RX_PRECOMP(prog));
-#endif
-
- restart:
- /* Find a possible match in the region s..strend by looking for
- the "check" substring in the region corrected by start/end_shift. */
-
- {
- I32 srch_start_shift = start_shift;
- I32 srch_end_shift = end_shift;
- if (srch_start_shift < 0 && strbeg - s > srch_start_shift) {
- srch_end_shift -= ((strbeg - s) - srch_start_shift);
- srch_start_shift = strbeg - s;
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "Check offset min: %"IVdf" Start shift: %"IVdf" End shift %"IVdf" Real End Shift: %"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)srch_start_shift,
- (IV)srch_end_shift,
- (IV)prog->check_end_shift);
- });
-
- if (flags & REXEC_SCREAM) {
- I32 p = -1; /* Internal iterator of scream. */
- I32 * const pp = data ? data->scream_pos : &p;
-
- if (PL_screamfirst[BmRARE(check)] >= 0
- || ( BmRARE(check) == '\n'
- && (BmPREVIOUS(check) == SvCUR(check) - 1)
- && SvTAIL(check) ))
- s = screaminstr(sv, check,
- srch_start_shift + (s - strbeg), srch_end_shift, pp, 0);
- else
- goto fail_finish;
- /* we may be pointing at the wrong string */
- if (s && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- if (data)
- *data->scream_olds = s;
- }
- else {
- U8* start_point;
- U8* end_point;
- if (prog->extflags & RXf_CANY_SEEN) {
- start_point= (U8*)(s + srch_start_shift);
- end_point= (U8*)(strend - srch_end_shift);
- } else {
- start_point= HOP3(s, srch_start_shift, srch_start_shift < 0 ? strbeg : strend);
- end_point= HOP3(strend, -srch_end_shift, strbeg);
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "fbm_instr len=%d str=<%.*s>\n",
- (int)(end_point - start_point),
- (int)(end_point - start_point) > 20 ? 20 : (int)(end_point - start_point),
- start_point);
- });
-
- s = fbm_instr( start_point, end_point,
- check, multiline ? FBMrf_MULTILINE : 0);
- }
- }
- /* Update the count-of-usability, remove useless subpatterns,
- unshift s. */
-
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(check), RE_SV_DUMPLEN(check), 30);
- PerlIO_printf(Perl_debug_log, "%s %s substr %s%s%s",
- (s ? "Found" : "Did not find"),
- (check == (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)
- ? "anchored" : "floating"),
- quoted,
- RE_SV_TAIL(check),
- (s ? " at offset " : "...\n") );
- });
-
- if (!s)
- goto fail_finish;
- /* Finish the diagnostic message */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) );
-
- /* XXX dmq: first branch is for positive lookbehind...
- Our check string is offset from the beginning of the pattern.
- So we need to do any stclass tests offset forward from that
- point. I think. :-(
- */
-
-
-
- check_at=s;
-
-
- /* Got a candidate. Check MBOL anchoring, and the *other* substr.
- Start with the other substr.
- XXXX no SCREAM optimization yet - and a very coarse implementation
- XXXX /ttx+/ results in anchored="ttx", floating="x". floating will
- *always* match. Probably should be marked during compile...
- Probably it is right to do no SCREAM here...
- */
-
- if (do_utf8 ? (prog->float_utf8 && prog->anchored_utf8)
- : (prog->float_substr && prog->anchored_substr))
- {
- /* Take into account the "other" substring. */
- /* XXXX May be hopelessly wrong for UTF... */
- if (!other_last)
- other_last = strpos;
- if (check == (do_utf8 ? prog->float_utf8 : prog->float_substr)) {
- do_other_anchored:
- {
- char * const last = HOP3c(s, -start_shift, strbeg);
- char *last1, *last2;
- char * const saved_s = s;
- SV* must;
-
- t = s - prog->check_offset_max;
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -(prog->check_offset_max), (U8*)strpos))
- && t > strpos)))
- NOOP;
- else
- t = strpos;
- t = HOP3c(t, prog->anchored_offset, strend);
- if (t < other_last) /* These positions already checked */
- t = other_last;
- last2 = last1 = HOP3c(strend, -prog->minlen, strbeg);
- if (last < last1)
- last1 = last;
- /* XXXX It is not documented what units *_offsets are in.
- We assume bytes, but this is clearly wrong.
- Meaning this code needs to be carefully reviewed for errors.
- dmq.
- */
-
- /* On end-of-str: see comment below. */
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->anchored_utf8); /* for debug */
- }
- else
- s = fbm_instr(
- (unsigned char*)t,
- HOP3(HOP3(last1, prog->anchored_offset, strend)
- + SvCUR(must), -(SvTAIL(must)!=0), strbeg),
- must,
- multiline ? FBMrf_MULTILINE : 0
- );
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s anchored substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
-
-
- if (!s) {
- if (last1 >= last2) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying floating at offset %ld...\n",
- (long)(HOP3c(saved_s, 1, strend) - i_strpos)));
- other_last = HOP3c(last1, prog->anchored_offset+1, strend);
- s = HOP3c(last, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- t = HOP3c(s, -prog->anchored_offset, strbeg);
- other_last = HOP3c(s, 1, strend);
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
- else { /* Take into account the floating substring. */
- char *last, *last1;
- char * const saved_s = s;
- SV* must;
-
- t = HOP3c(s, -start_shift, strbeg);
- last1 = last =
- HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg);
- if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset)
- last = HOP3c(t, prog->float_max_offset, strend);
- s = HOP3c(t, prog->float_min_offset, strend);
- if (s < other_last)
- s = other_last;
- /* XXXX It is not documented what units *_offsets are in. Assume bytes. */
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- /* fbm_instr() takes into account exact value of end-of-str
- if the check is SvTAIL(ed). Since false positives are OK,
- and end-of-str is not later than strend we are OK. */
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->float_utf8); /* for debug message */
- }
- else
- s = fbm_instr((unsigned char*)s,
- (unsigned char*)last + SvCUR(must)
- - (SvTAIL(must)!=0),
- must, multiline ? FBMrf_MULTILINE : 0);
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s floating substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
- if (!s) {
- if (last1 == last) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying anchored starting at offset %ld...\n",
- (long)(saved_s + 1 - i_strpos)));
- other_last = last;
- s = HOP3c(t, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- other_last = s; /* Fix this later. --Hugo */
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
-
-
- t= (char*)HOP3( s, -prog->check_offset_max, (prog->check_offset_max<0) ? strend : strpos);
-
- DEBUG_OPTIMISE_MORE_r(
- PerlIO_printf(Perl_debug_log,
- "Check offset min:%"IVdf" max:%"IVdf" S:%"IVdf" t:%"IVdf" D:%"IVdf" end:%"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)prog->check_offset_max,
- (IV)(s-strpos),
- (IV)(t-strpos),
- (IV)(t-s),
- (IV)(strend-strpos)
- )
- );
-
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -prog->check_offset_max, (U8*) ((prog->check_offset_max<0) ? strend : strpos)))
- && t > strpos)))
- {
- /* Fixed substring is found far enough so that the match
- cannot start at strpos. */
- try_at_offset:
- if (ml_anch && t[-1] != '\n') {
- /* Eventually fbm_*() should handle this, but often
- anchored_offset is not 0, so this check will not be wasted. */
- /* XXXX In the code below we prefer to look for "^" even in
- presence of anchored substrings. And we search even
- beyond the found float position. These pessimizations
- are historical artefacts only. */
- find_anchor:
- while (t < strend - prog->minlen) {
- if (*t == '\n') {
- if (t < check_at - prog->check_offset_min) {
- if (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) {
- /* Since we moved from the found position,
- we definitely contradict the found anchored
- substr. Due to the above check we do not
- contradict "check" substr.
- Thus we can arrive here only if check substr
- is float. Redo checking for "other"=="fixed".
- */
- strpos = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset)));
- goto do_other_anchored;
- }
- /* We don't contradict the found floating substring. */
- /* XXXX Why not check for STCLASS? */
- s = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(s - i_strpos)));
- goto set_useful;
- }
- /* Position contradicts check-string */
- /* XXXX probably better to look for check-string
- than for "\n", so one should lower the limit for t? */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t + 1 - i_strpos)));
- other_last = strpos = s = t + 1;
- goto restart;
- }
- t++;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- goto fail_finish;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- }
- s = t;
- set_useful:
- ++BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr); /* hooray/5 */
- }
- else {
- /* The found string does not prohibit matching at strpos,
- - no optimization of calling REx engine can be performed,
- unless it was an MBOL and we are not after MBOL,
- or a future STCLASS check will fail this. */
- try_at_start:
- /* Even in this situation we may use MBOL flag if strpos is offset
- wrt the start of the string. */
- if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */
- && (strpos != strbeg) && strpos[-1] != '\n'
- /* May be due to an implicit anchor of m{.*foo} */
- && !(prog->intflags & PREGf_IMPLICIT))
- {
- t = strpos;
- goto find_anchor;
- }
- DEBUG_EXECUTE_r( if (ml_anch)
- PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n",
- (long)(strpos - i_strpos), PL_colors[0], PL_colors[1]);
- );
- success_at_start:
- if (!(prog->intflags & PREGf_NAUGHTY) /* XXXX If strpos moved? */
- && (do_utf8 ? (
- prog->check_utf8 /* Could be deleted already */
- && --BmUSEFUL(prog->check_utf8) < 0
- && (prog->check_utf8 == prog->float_utf8)
- ) : (
- prog->check_substr /* Could be deleted already */
- && --BmUSEFUL(prog->check_substr) < 0
- && (prog->check_substr == prog->float_substr)
- )))
- {
- /* If flags & SOMETHING - do not do it many times on the same match */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n"));
- /* XXX Does the destruction order has to change with do_utf8? */
- SvREFCNT_dec(do_utf8 ? prog->check_utf8 : prog->check_substr);
- SvREFCNT_dec(do_utf8 ? prog->check_substr : prog->check_utf8);
- prog->check_substr = prog->check_utf8 = NULL; /* disable */
- prog->float_substr = prog->float_utf8 = NULL; /* clear */
- check = NULL; /* abort */
- s = strpos;
- /* XXXX This is a remnant of the old implementation. It
- looks wasteful, since now INTUIT can use many
- other heuristics. */
- prog->extflags &= ~RXf_USE_INTUIT;
- }
- else
- s = strpos;
- }
-
- /* Last resort... */
- /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */
- /* trie stclasses are too expensive to use here, we are better off to
- leave it to regmatch itself */
- if (progi->regstclass && PL_regkind[OP(progi->regstclass)]!=TRIE) {
- /* minlen == 0 is possible if regstclass is \b or \B,
- and the fixed substr is ''$.
- Since minlen is already taken into account, s+1 is before strend;
- accidentally, minlen >= 1 guaranties no false positives at s + 1
- even for \b or \B. But (minlen? 1 : 0) below assumes that
- regstclass does not come from lookahead... */
- /* If regstclass takes bytelength more than 1: If charlength==1, OK.
- This leaves EXACTF only, which is dealt with in find_byclass(). */
- const U8* const str = (U8*)STRING(progi->regstclass);
- const int cl_l = (PL_regkind[OP(progi->regstclass)] == EXACT
- ? CHR_DIST(str+STR_LEN(progi->regstclass), str)
- : 1);
- char * endpos;
- if (prog->anchored_substr || prog->anchored_utf8 || ml_anch)
- endpos= HOP3c(s, (prog->minlen ? cl_l : 0), strend);
- else if (prog->float_substr || prog->float_utf8)
- endpos= HOP3c(HOP3c(check_at, -start_shift, strbeg), cl_l, strend);
- else
- endpos= strend;
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %"IVdf" s: %"IVdf" endpos: %"IVdf"\n",
- (IV)start_shift, (IV)(check_at - strbeg), (IV)(s - strbeg), (IV)(endpos - strbeg)));
-
- t = s;
- s = find_byclass(prog, progi->regstclass, s, endpos, NULL);
- if (!s) {
-#ifdef DEBUGGING
- const char *what = NULL;
-#endif
- if (endpos == strend) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "This position contradicts STCLASS...\n") );
- if ((prog->extflags & RXf_ANCH) && !ml_anch)
- goto fail;
- /* Contradict one of substrings */
- if (prog->anchored_substr || prog->anchored_utf8) {
- if ((do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) == check) {
- DEBUG_EXECUTE_r( what = "anchored" );
- hop_and_restart:
- s = HOP3c(t, 1, strend);
- if (s + start_shift + end_shift > strend) {
- /* XXXX Should be taken into account earlier? */
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for %s substr starting at offset %ld...\n",
- what, (long)(s + start_shift - i_strpos)) );
- goto restart;
- }
- /* Have both, check_string is floating */
- if (t + start_shift >= check_at) /* Contradicts floating=check */
- goto retry_floating_check;
- /* Recheck anchored substring, but not floating... */
- s = check_at;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for anchored substr starting at offset %ld...\n",
- (long)(other_last - i_strpos)) );
- goto do_other_anchored;
- }
- /* Another way we could have checked stclass at the
- current position only: */
- if (ml_anch) {
- s = t = t + 1;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for /%s^%s/m starting at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t - i_strpos)) );
- goto try_at_offset;
- }
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) /* Could have been deleted */
- goto fail;
- /* Check is floating subtring. */
- retry_floating_check:
- t = check_at - start_shift;
- DEBUG_EXECUTE_r( what = "floating" );
- goto hop_and_restart;
- }
- if (t != s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "By STCLASS: moving %ld --> %ld\n",
- (long)(t - i_strpos), (long)(s - i_strpos))
- );
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Does not contradict STCLASS...\n");
- );
- }
- }
- giveup:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n",
- PL_colors[4], (check ? "Guessed" : "Giving up"),
- PL_colors[5], (long)(s - i_strpos)) );
- return s;
-
- fail_finish: /* Substring not found */
- if (prog->check_substr || prog->check_utf8) /* could be removed already */
- BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr) += 5; /* hooray */
- fail:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n",
- PL_colors[4], PL_colors[5]));
- return NULL;
-}
-
-#define DECL_TRIE_TYPE(scan) \
- const enum { trie_plain, trie_utf8, trie_utf8_fold, trie_latin_utf8_fold } \
- trie_type = (scan->flags != EXACT) \
- ? (do_utf8 ? trie_utf8_fold : (UTF ? trie_latin_utf8_fold : trie_plain)) \
- : (do_utf8 ? trie_utf8 : trie_plain)
-
-#define REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, uscan, len, \
-uvc, charid, foldlen, foldbuf, uniflags) STMT_START { \
- switch (trie_type) { \
- case trie_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_latin_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- len = 1; \
- uvc = to_uni_fold( *(U8*)uc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_utf8: \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- break; \
- case trie_plain: \
- uvc = (UV)*uc; \
- len = 1; \
- } \
- if (uvc < 256) { \
- charid = trie->charmap[ uvc ]; \
- } \
- else { \
- charid = 0; \
- if (widecharmap) { \
- SV** const svpp = hv_fetch(widecharmap, \
- (char*)&uvc, sizeof(UV), 0); \
- if (svpp) \
- charid = (U16)SvIV(*svpp); \
- } \
- } \
-} STMT_END
-
-#define REXEC_FBC_EXACTISH_CHECK(CoNd) \
-{ \
- char *my_strend= (char *)strend; \
- if ( (CoNd) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8, \
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- else { \
- U8 foldbuf[UTF8_MAXBYTES_CASE+1]; \
- uvchr_to_utf8(tmpbuf, c); \
- f = to_utf8_fold(tmpbuf, foldbuf, &foldlen); \
- if ( f != c \
- && (f == c1 || f == c2) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8,\
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- } \
-} \
-s += len
-
-#define REXEC_FBC_EXACTISH_SCAN(CoNd) \
-STMT_START { \
- while (s <= e) { \
- if ( (CoNd) \
- && (ln == 1 || !(OP(c) == EXACTF \
- ? ibcmp(s, m, ln) \
- : ibcmp_locale(s, m, ln))) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_SCAN(CoDe) \
-STMT_START { \
- while (s + (uskip = UTF8SKIP(s)) <= strend) { \
- CoDe \
- s += uskip; \
- } \
-} STMT_END
-
-#define REXEC_FBC_SCAN(CoDe) \
-STMT_START { \
- while (s < strend) { \
- CoDe \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_CLASS_SCAN(CoNd) \
-REXEC_FBC_UTF8_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_CLASS_SCAN(CoNd) \
-REXEC_FBC_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_TRYIT \
-if ((!reginfo || regtry(reginfo, &s))) \
- goto got_it
-
-#define REXEC_FBC_CSCAN(CoNdUtF8,CoNd) \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_PRELOAD(UtFpReLoAd,CoNdUtF8,CoNd) \
- if (do_utf8) { \
- UtFpReLoAd; \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_TAINT(CoNdUtF8,CoNd) \
- PL_reg_flags |= RF_tainted; \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define DUMP_EXEC_POS(li,s,doutf8) \
- dump_exec_pos(li,s,(PL_regeol),(PL_bostr),(PL_reg_starttry),doutf8)
-
-/* We know what class REx starts with. Try to find this position... */
-/* if reginfo is NULL, its a dryrun */
-/* annoyingly all the vars in this routine have different names from their counterparts
- in regmatch. /grrr */
-
-STATIC char *
-S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
- const char *strend, regmatch_info *reginfo)
-{
- dVAR;
- const I32 doevery = (prog->intflags & PREGf_SKIP) == 0;
- char *m;
- STRLEN ln;
- STRLEN lnc;
- register STRLEN uskip;
- unsigned int c1;
- unsigned int c2;
- char *e;
- register I32 tmp = 1; /* Scratch variable? */
- register const bool do_utf8 = PL_reg_match_utf8;
- RXi_GET_DECL(prog,progi);
-
- PERL_ARGS_ASSERT_FIND_BYCLASS;
-
- /* We know what class it must start with. */
- switch (OP(c)) {
- case ANYOF:
- if (do_utf8) {
- REXEC_FBC_UTF8_CLASS_SCAN((ANYOF_FLAGS(c) & ANYOF_UNICODE) ||
- !UTF8_IS_INVARIANT((U8)s[0]) ?
- reginclass(prog, c, (U8*)s, 0, do_utf8) :
- REGINCLASS(prog, c, (U8*)s));
- }
- else {
- while (s < strend) {
- STRLEN skip = 1;
-
- if (REGINCLASS(prog, c, (U8*)s) ||
- (ANYOF_FOLD_SHARP_S(c, s, strend) &&
- /* The assignment of 2 is intentional:
- * for the folded sharp s, the skip is 2. */
- (skip = SHARP_S_SKIP))) {
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += skip;
- }
- }
- break;
- case CANY:
- REXEC_FBC_SCAN(
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- );
- break;
- case EXACTF:
- m = STRING(c);
- ln = STR_LEN(c); /* length to match in octets/bytes */
- lnc = (I32) ln; /* length to match in characters */
- if (UTF) {
- STRLEN ulen1, ulen2;
- U8 *sm = (U8 *) m;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
- /* used by commented-out code below */
- /*const U32 uniflags = UTF8_ALLOW_DEFAULT;*/
-
- /* XXX: Since the node will be case folded at compile
- time this logic is a little odd, although im not
- sure that its actually wrong. --dmq */
-
- c1 = to_utf8_lower((U8*)m, tmpbuf1, &ulen1);
- c2 = to_utf8_upper((U8*)m, tmpbuf2, &ulen2);
-
- /* XXX: This is kinda strange. to_utf8_XYZ returns the
- codepoint of the first character in the converted
- form, yet originally we did the extra step.
- No tests fail by commenting this code out however
- so Ive left it out. -- dmq.
-
- c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- */
-
- lnc = 0;
- while (sm < ((U8 *) m + ln)) {
- lnc++;
- sm += UTF8SKIP(sm);
- }
- }
- else {
- c1 = *(U8*)m;
- c2 = PL_fold[c1];
- }
- goto do_exactf;
- case EXACTFL:
- m = STRING(c);
- ln = STR_LEN(c);
- lnc = (I32) ln;
- c1 = *(U8*)m;
- c2 = PL_fold_locale[c1];
- do_exactf:
- e = HOP3c(strend, -((I32)lnc), s);
-
- if (!reginfo && e < s)
- e = s; /* Due to minlen logic of intuit() */
-
- /* The idea in the EXACTF* cases is to first find the
- * first character of the EXACTF* node and then, if
- * necessary, case-insensitively compare the full
- * text of the node. The c1 and c2 are the first
- * characters (though in Unicode it gets a bit
- * more complicated because there are more cases
- * than just upper and lower: one needs to use
- * the so-called folding case for case-insensitive
- * matching (called "loose matching" in Unicode).
- * ibcmp_utf8() will do just that. */
-
- if (do_utf8 || UTF) {
- UV c, f;
- U8 tmpbuf [UTF8_MAXBYTES+1];
- STRLEN len = 1;
- STRLEN foldlen;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- if (c1 == c2) {
- /* Upper and lower of 1st char are equal -
- * probably not a "letter". */
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
- REXEC_FBC_EXACTISH_CHECK(c == c1);
- }
- }
- else {
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
-
- /* Handle some of the three Greek sigmas cases.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (the character class or ANYOF cases)
- * are handled during compiletime in
- * regexec.c:S_regclass(). */
- if (c == (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA ||
- c == (UV)UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA)
- c = (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA;
-
- REXEC_FBC_EXACTISH_CHECK(c == c1 || c == c2);
- }
- }
- }
- else {
- /* Neither pattern nor string are UTF8 */
- if (c1 == c2)
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1);
- else
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1 || *(U8*)s == c2);
- }
- break;
- case BOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == BOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == BOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- if ((!prog->minlen && tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NBOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == NBOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == NBOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == NBOUND ?
- isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- if ((!prog->minlen && !tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case ALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- isALNUM(*s)
- );
- case ALNUML:
- REXEC_FBC_CSCAN_TAINT(
- isALNUM_LC_utf8((U8*)s),
- isALNUM_LC(*s)
- );
- case NALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- !swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- !isALNUM(*s)
- );
- case NALNUML:
- REXEC_FBC_CSCAN_TAINT(
- !isALNUM_LC_utf8((U8*)s),
- !isALNUM_LC(*s)
- );
- case SPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- *s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8),
- isSPACE(*s)
- );
- case SPACEL:
- REXEC_FBC_CSCAN_TAINT(
- *s == ' ' || isSPACE_LC_utf8((U8*)s),
- isSPACE_LC(*s)
- );
- case NSPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- !(*s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8)),
- !isSPACE(*s)
- );
- case NSPACEL:
- REXEC_FBC_CSCAN_TAINT(
- !(*s == ' ' || isSPACE_LC_utf8((U8*)s)),
- !isSPACE_LC(*s)
- );
- case DIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- isDIGIT(*s)
- );
- case DIGITL:
- REXEC_FBC_CSCAN_TAINT(
- isDIGIT_LC_utf8((U8*)s),
- isDIGIT_LC(*s)
- );
- case NDIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- !swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- !isDIGIT(*s)
- );
- case NDIGITL:
- REXEC_FBC_CSCAN_TAINT(
- !isDIGIT_LC_utf8((U8*)s),
- !isDIGIT_LC(*s)
- );
- case LNBREAK:
- REXEC_FBC_CSCAN(
- is_LNBREAK_utf8(s),
- is_LNBREAK_latin1(s)
- );
- case VERTWS:
- REXEC_FBC_CSCAN(
- is_VERTWS_utf8(s),
- is_VERTWS_latin1(s)
- );
- case NVERTWS:
- REXEC_FBC_CSCAN(
- !is_VERTWS_utf8(s),
- !is_VERTWS_latin1(s)
- );
- case HORIZWS:
- REXEC_FBC_CSCAN(
- is_HORIZWS_utf8(s),
- is_HORIZWS_latin1(s)
- );
- case NHORIZWS:
- REXEC_FBC_CSCAN(
- !is_HORIZWS_utf8(s),
- !is_HORIZWS_latin1(s)
- );
- case AHOCORASICKC:
- case AHOCORASICK:
- {
- DECL_TRIE_TYPE(c);
- /* what trie are we using right now */
- reg_ac_data *aho
- = (reg_ac_data*)progi->data->data[ ARG( c ) ];
- reg_trie_data *trie
- = (reg_trie_data*)progi->data->data[ aho->trie ];
- HV *widecharmap = MUTABLE_HV(progi->data->data[ aho->trie + 1 ]);
-
- const char *last_start = strend - trie->minlen;
-#ifdef DEBUGGING
- const char *real_start = s;
-#endif
- STRLEN maxlen = trie->maxlen;
- SV *sv_points;
- U8 **points; /* map of where we were in the input string
- when reading a given char. For ASCII this
- is unnecessary overhead as the relationship
- is always 1:1, but for Unicode, especially
- case folded Unicode this is not true. */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- U8 *bitmap=NULL;
-
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- /* We can't just allocate points here. We need to wrap it in
- * an SV so it gets freed properly if there is a croak while
- * running the match */
- ENTER;
- SAVETMPS;
- sv_points=newSV(maxlen * sizeof(U8 *));
- SvCUR_set(sv_points,
- maxlen * sizeof(U8 *));
- SvPOK_on(sv_points);
- sv_2mortal(sv_points);
- points=(U8**)SvPV_nolen(sv_points );
- if ( trie_type != trie_utf8_fold
- && (trie->bitmap || OP(c)==AHOCORASICKC) )
- {
- if (trie->bitmap)
- bitmap=(U8*)trie->bitmap;
- else
- bitmap=(U8*)ANYOF_BITMAP(c);
- }
- /* this is the Aho-Corasick algorithm modified a touch
- to include special handling for long "unknown char"
- sequences. The basic idea being that we use AC as long
- as we are dealing with a possible matching char, when
- we encounter an unknown char (and we have not encountered
- an accepting state) we scan forward until we find a legal
- starting char.
- AC matching is basically that of trie matching, except
- that when we encounter a failing transition, we fall back
- to the current states "fail state", and try the current char
- again, a process we repeat until we reach the root state,
- state 1, or a legal transition. If we fail on the root state
- then we can either terminate if we have reached an accepting
- state previously, or restart the entire process from the beginning
- if we have not.
-
- */
- while (s <= last_start) {
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- U8 *uc = (U8*)s;
- U16 charid = 0;
- U32 base = 1;
- U32 state = 1;
- UV uvc = 0;
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- U8 *leftmost = NULL;
-#ifdef DEBUGGING
- U32 accepted_word= 0;
-#endif
- U32 pointpos = 0;
-
- while ( state && uc <= (U8*)strend ) {
- int failed=0;
- U32 word = aho->states[ state ].wordnum;
-
- if( state==1 ) {
- if ( bitmap ) {
- DEBUG_TRIE_EXECUTE_r(
- if ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- dump_exec_pos( (char *)uc, c, strend, real_start,
- (char *)uc, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- " Scanning for legal start char...\n");
- }
- );
- while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- uc++;
- }
- s= (char *)uc;
- }
- if (uc >(U8*)last_start) break;
- }
-
- if ( word ) {
- U8 *lpos= points[ (pointpos - trie->wordlen[word-1] ) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=word);
- leftmost= lpos;
- }
- if (base==0) break;
-
- }
- points[pointpos++ % maxlen]= uc;
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
- DEBUG_TRIE_EXECUTE_r({
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf(Perl_debug_log,
- " Charid:%3u CP:%4"UVxf" ",
- charid, uvc);
- });
-
- do {
-#ifdef DEBUGGING
- word = aho->states[ state ].wordnum;
-#endif
- base = aho->states[ state ].trans.base;
-
- DEBUG_TRIE_EXECUTE_r({
- if (failed)
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%sState: %4"UVxf", word=%"UVxf,
- failed ? " Fail transition to " : "",
- (UV)state, (UV)word);
- });
- if ( base ) {
- U32 tmp;
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state
- && (tmp=trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next))
- {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - legal\n"));
- state = tmp;
- break;
- }
- else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - fail\n"));
- failed = 1;
- state = aho->fail[state];
- }
- }
- else {
- /* we must be accepting here */
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - accepting\n"));
- failed = 1;
- break;
- }
- } while(state);
- uc += len;
- if (failed) {
- if (leftmost)
- break;
- if (!state) state = 1;
- }
- }
- if ( aho->states[ state ].wordnum ) {
- U8 *lpos = points[ (pointpos - trie->wordlen[aho->states[ state ].wordnum-1]) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=aho->states[ state ].wordnum);
- leftmost = lpos;
- }
- }
- if (leftmost) {
- s = (char*)leftmost;
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf(
- Perl_debug_log,"Matches word #%"UVxf" at position %"IVdf". Trying full pattern...\n",
- (UV)accepted_word, (IV)(s - real_start)
- );
- });
- if (!reginfo || regtry(reginfo, &s)) {
- FREETMPS;
- LEAVE;
- goto got_it;
- }
- s = HOPc(s,1);
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,"Pattern failed. Looking for new start point...\n");
- });
- } else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,"No match.\n"));
- break;
- }
- }
- FREETMPS;
- LEAVE;
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c));
- break;
- }
- return 0;
- got_it:
- return s;
-}
-
-
-/*
- - regexec_flags - match a regexp against a string
- */
-I32
-Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, register char *strend,
- char *strbeg, I32 minend, SV *sv, void *data, U32 flags)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* data: May be used for some additional optimizations.
- Currently its only used, with a U32 cast, for transmitting
- the ganch offset when doing a /g match. This will change */
-/* nosave: For optimizations. */
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- /*register*/ char *s;
- register regnode *c;
- /*register*/ char *startpos = stringarg;
- I32 minlen; /* must match at least this many chars */
- I32 dontbother = 0; /* how many characters not to try at end */
- I32 end_shift = 0; /* Same for the end. */ /* CC */
- I32 scream_pos = -1; /* Internal iterator of scream. */
- char *scream_olds = NULL;
- const bool do_utf8 = (bool)DO_UTF8(sv);
- I32 multiline;
- RXi_GET_DECL(prog,progi);
- regmatch_info reginfo; /* create some info to pass to regtry etc */
- regexp_paren_pair *swap = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGEXEC_FLAGS;
- PERL_UNUSED_ARG(data);
-
- /* Be paranoid... */
- if (prog == NULL || startpos == NULL) {
- Perl_croak(aTHX_ "NULL regexp parameter");
- return 0;
- }
-
- multiline = prog->extflags & RXf_PMf_MULTILINE;
- reginfo.prog = rx; /* Yes, sorry that this is confusing. */
-
- RX_MATCH_UTF8_set(rx, do_utf8);
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, startpos, strend,
- "Matching");
- );
-
- minlen = prog->minlen;
-
- if (strend - startpos < (minlen+(prog->check_offset_min<0?prog->check_offset_min:0))) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short [regexec_flags]...\n"));
- goto phooey;
- }
-
-
- /* Check validity of program. */
- if (UCHARAT(progi->program) != REG_MAGIC) {
- Perl_croak(aTHX_ "corrupted regexp program");
- }
-
- PL_reg_flags = 0;
- PL_reg_eval_set = 0;
- PL_reg_maxiter = 0;
-
- if (RX_UTF8(rx))
- PL_reg_flags |= RF_utf8;
-
- /* Mark beginning of line for ^ and lookbehind. */
- reginfo.bol = startpos; /* XXX not used ??? */
- PL_bostr = strbeg;
- reginfo.sv = sv;
-
- /* Mark end of line for $ (and such) */
- PL_regeol = strend;
-
- /* see how far we have to get to not match where we matched before */
- reginfo.till = startpos+minend;
-
- /* If there is a "must appear" string, look for it. */
- s = startpos;
-
- if (prog->extflags & RXf_GPOS_SEEN) { /* Need to set reginfo->ganch */
- MAGIC *mg;
- if (flags & REXEC_IGNOREPOS){ /* Means: check only at start */
- reginfo.ganch = startpos + prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS IGNOREPOS: reginfo.ganch = startpos + %"UVxf"\n",(UV)prog->gofs));
- } else if (sv && SvTYPE(sv) >= SVt_PVMG
- && SvMAGIC(sv)
- && (mg = mg_find(sv, PERL_MAGIC_regex_global))
- && mg->mg_len >= 0) {
- reginfo.ganch = strbeg + mg->mg_len; /* Defined pos() */
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS MAGIC: reginfo.ganch = strbeg + %"IVdf"\n",(IV)mg->mg_len));
-
- if (prog->extflags & RXf_ANCH_GPOS) {
- if (s > reginfo.ganch)
- goto phooey;
- s = reginfo.ganch - prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS ANCH_GPOS: s = ganch - %"UVxf"\n",(UV)prog->gofs));
- if (s < strbeg)
- goto phooey;
- }
- }
- else if (data) {
- reginfo.ganch = strbeg + PTR2UV(data);
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS DATA: reginfo.ganch= strbeg + %"UVxf"\n",PTR2UV(data)));
-
- } else { /* pos() not defined */
- reginfo.ganch = strbeg;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS: reginfo.ganch = strbeg\n"));
- }
- }
- if (PL_curpm && (PM_GETRE(PL_curpm) == rx)) {
- /* We have to be careful. If the previous successful match
- was from this regex we don't want a subsequent partially
- successful match to clobber the old results.
- So when we detect this possibility we add a swap buffer
- to the re, and switch the buffer each match. If we fail
- we switch it back, otherwise we leave it swapped.
- */
- swap = prog->offs;
- /* do we need a save destructor here for eval dies? */
- Newxz(prog->offs, (prog->nparens + 1), regexp_paren_pair);
- }
- if (!(flags & REXEC_CHECKED) && (prog->check_substr != NULL || prog->check_utf8 != NULL)) {
- re_scream_pos_data d;
-
- d.scream_olds = &scream_olds;
- d.scream_pos = &scream_pos;
- s = re_intuit_start(rx, sv, s, strend, flags, &d);
- if (!s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not present...\n"));
- goto phooey; /* not present */
- }
- }
-
-
-
- /* Simplest case: anchored match need be tried only once. */
- /* [unless only anchor is BOL and multiline is set] */
- if (prog->extflags & (RXf_ANCH & ~RXf_ANCH_GPOS)) {
- if (s == startpos && regtry(®info, &startpos))
- goto got_it;
- else if (multiline || (prog->intflags & PREGf_IMPLICIT)
- || (prog->extflags & RXf_ANCH_MBOL)) /* XXXX SBOL? */
- {
- char *end;
-
- if (minlen)
- dontbother = minlen - 1;
- end = HOP3c(strend, -dontbother, strbeg) - 1;
- /* for multiline we only have to try after newlines */
- if (prog->check_substr || prog->check_utf8) {
- if (s == startpos)
- goto after_try;
- while (1) {
- if (regtry(®info, &s))
- goto got_it;
- after_try:
- if (s > end)
- goto phooey;
- if (prog->extflags & RXf_USE_INTUIT) {
- s = re_intuit_start(rx, sv, s + 1, strend, flags, NULL);
- if (!s)
- goto phooey;
- }
- else
- s++;
- }
- } else {
- if (s > startpos)
- s--;
- while (s < end) {
- if (*s++ == '\n') { /* don't need PL_utf8skip here */
- if (regtry(®info, &s))
- goto got_it;
- }
- }
- }
- }
- goto phooey;
- } else if (RXf_GPOS_CHECK == (prog->extflags & RXf_GPOS_CHECK))
- {
- /* the warning about reginfo.ganch being used without intialization
- is bogus -- we set it above, when prog->extflags & RXf_GPOS_SEEN
- and we only enter this block when the same bit is set. */
- char *tmp_s = reginfo.ganch - prog->gofs;
-
- if (tmp_s >= strbeg && regtry(®info, &tmp_s))
- goto got_it;
- goto phooey;
- }
-
- /* Messy cases: unanchored match. */
- if ((prog->anchored_substr || prog->anchored_utf8) && prog->intflags & PREGf_SKIP) {
- /* we have /x+whatever/ */
- /* it must be a one character string (XXXX Except UTF?) */
- char ch;
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- ch = SvPVX_const(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)[0];
-
- if (do_utf8) {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s += UTF8SKIP(s);
- while (s < strend && *s == ch)
- s += UTF8SKIP(s);
- }
- );
- }
- else {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s++;
- while (s < strend && *s == ch)
- s++;
- }
- );
- }
- DEBUG_EXECUTE_r(if (!did_match)
- PerlIO_printf(Perl_debug_log,
- "Did not find anchored character...\n")
- );
- }
- else if (prog->anchored_substr != NULL
- || prog->anchored_utf8 != NULL
- || ((prog->float_substr != NULL || prog->float_utf8 != NULL)
- && prog->float_max_offset < strend - s)) {
- SV *must;
- I32 back_max;
- I32 back_min;
- char *last;
- char *last1; /* Last position checked before */
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (prog->anchored_substr || prog->anchored_utf8) {
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- back_max = back_min = prog->anchored_offset;
- } else {
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- back_max = prog->float_max_offset;
- back_min = prog->float_min_offset;
- }
-
-
- if (must == &PL_sv_undef)
- /* could not downgrade utf8 check substring, so must fail */
- goto phooey;
-
- if (back_min<0) {
- last = strend;
- } else {
- last = HOP3c(strend, /* Cannot start after this */
- -(I32)(CHR_SVLEN(must)
- - (SvTAIL(must) != 0) + back_min), strbeg);
- }
- if (s > PL_bostr)
- last1 = HOPc(s, -1);
- else
- last1 = s - 1; /* bogus */
-
- /* XXXX check_substr already used to find "s", can optimize if
- check_substr==must. */
- scream_pos = -1;
- dontbother = end_shift;
- strend = HOPc(strend, -dontbother);
- while ( (s <= last) &&
- ((flags & REXEC_SCREAM)
- ? (s = screaminstr(sv, must, HOP3c(s, back_min, (back_min<0 ? strbeg : strend)) - strbeg,
- end_shift, &scream_pos, 0))
- : (s = fbm_instr((unsigned char*)HOP3(s, back_min, (back_min<0 ? strbeg : strend)),
- (unsigned char*)strend, must,
- multiline ? FBMrf_MULTILINE : 0))) ) {
- /* we may be pointing at the wrong string */
- if ((flags & REXEC_SCREAM) && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- DEBUG_EXECUTE_r( did_match = 1 );
- if (HOPc(s, -back_max) > last1) {
- last1 = HOPc(s, -back_min);
- s = HOPc(s, -back_max);
- }
- else {
- char * const t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1;
-
- last1 = HOPc(s, -back_min);
- s = t;
- }
- if (do_utf8) {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s += UTF8SKIP(s);
- }
- }
- else {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s++;
- }
- }
- }
- DEBUG_EXECUTE_r(if (!did_match) {
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "Did not find %s substr %s%s...\n",
- ((must == prog->anchored_substr || must == prog->anchored_utf8)
- ? "anchored" : "floating"),
- quoted, RE_SV_TAIL(must));
- });
- goto phooey;
- }
- else if ( (c = progi->regstclass) ) {
- if (minlen) {
- const OPCODE op = OP(progi->regstclass);
- /* don't bother with what can't match */
- if (PL_regkind[op] != EXACT && op != CANY && PL_regkind[op] != TRIE)
- strend = HOPc(strend, -(minlen - 1));
- }
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, c);
- {
- RE_PV_QUOTED_DECL(quoted,do_utf8,PERL_DEBUG_PAD_ZERO(1),
- s,strend-s,60);
- PerlIO_printf(Perl_debug_log,
- "Matching stclass %.*s against %s (%d chars)\n",
- (int)SvCUR(prop), SvPVX_const(prop),
- quoted, (int)(strend - s));
- }
- });
- if (find_byclass(prog, c, s, strend, ®info))
- goto got_it;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass... [regexec_flags]\n"));
- }
- else {
- dontbother = 0;
- if (prog->float_substr != NULL || prog->float_utf8 != NULL) {
- /* Trim the end. */
- char *last;
- SV* float_real;
-
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- float_real = do_utf8 ? prog->float_utf8 : prog->float_substr;
-
- if (flags & REXEC_SCREAM) {
- last = screaminstr(sv, float_real, s - strbeg,
- end_shift, &scream_pos, 1); /* last one */
- if (!last)
- last = scream_olds; /* Only one occurrence. */
- /* we may be pointing at the wrong string */
- else if (RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- }
- else {
- STRLEN len;
- const char * const little = SvPV_const(float_real, len);
-
- if (SvTAIL(float_real)) {
- if (memEQ(strend - len + 1, little, len - 1))
- last = strend - len + 1;
- else if (!multiline)
- last = memEQ(strend - len, little, len)
- ? strend - len : NULL;
- else
- goto find_last;
- } else {
- find_last:
- if (len)
- last = rninstr(s, strend, little, little + len);
- else
- last = strend; /* matching "$" */
- }
- }
- if (last == NULL) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%sCan't trim the tail, match fails (should not happen)%s\n",
- PL_colors[4], PL_colors[5]));
- goto phooey; /* Should not happen! */
- }
- dontbother = strend - last + prog->float_min_offset;
- }
- if (minlen && (dontbother < minlen))
- dontbother = minlen - 1;
- strend -= dontbother; /* this one's always in bytes! */
- /* We don't know much -- general case. */
- if (do_utf8) {
- for (;;) {
- if (regtry(®info, &s))
- goto got_it;
- if (s >= strend)
- break;
- s += UTF8SKIP(s);
- };
- }
- else {
- do {
- if (regtry(®info, &s))
- goto got_it;
- } while (s++ < strend);
- }
- }
-
- /* Failure. */
- goto phooey;
-
-got_it:
- Safefree(swap);
- RX_MATCH_TAINTED_set(rx, PL_reg_flags & RF_tainted);
-
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (RXp_PAREN_NAMES(prog))
- (void)hv_iterinit(RXp_PAREN_NAMES(prog));
-
- /* make sure $`, $&, $', and $digit will work later */
- if ( !(flags & REXEC_NOT_FIRST) ) {
- RX_MATCH_COPY_FREE(rx);
- if (flags & REXEC_COPY_STR) {
- const I32 i = PL_regeol - startpos + (stringarg - strbeg);
-#ifdef PERL_OLD_COPY_ON_WRITE
- if ((SvIsCOW(sv)
- || (SvFLAGS(sv) & CAN_COW_MASK) == CAN_COW_FLAGS)) {
- if (DEBUG_C_TEST) {
- PerlIO_printf(Perl_debug_log,
- "Copy on write: regexp capture, type %d\n",
- (int) SvTYPE(sv));
- }
- prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv);
- prog->subbeg = (char *)SvPVX_const(prog->saved_copy);
- assert (SvPOKp(prog->saved_copy));
- } else
-#endif
- {
- RX_MATCH_COPIED_on(rx);
- s = savepvn(strbeg, i);
- prog->subbeg = s;
- }
- prog->sublen = i;
- }
- else {
- prog->subbeg = strbeg;
- prog->sublen = PL_regeol - strbeg; /* strend may have been modified */
- }
- }
-
- return 1;
-
-phooey:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n",
- PL_colors[4], PL_colors[5]));
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (swap) {
- /* we failed :-( roll it back */
- Safefree(prog->offs);
- prog->offs = swap;
- }
-
- return 0;
-}
-
-
-/*
- - regtry - try match at specific point
- */
-STATIC I32 /* 0 failure, 1 success */
-S_regtry(pTHX_ regmatch_info *reginfo, char **startpos)
-{
- dVAR;
- CHECKPOINT lastcp;
- REGEXP *const rx = reginfo->prog;
- regexp *const prog = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTRY;
-
- reginfo->cutpoint=NULL;
-
- if ((prog->extflags & RXf_EVAL_SEEN) && !PL_reg_eval_set) {
- MAGIC *mg;
-
- PL_reg_eval_set = RS_init;
- DEBUG_EXECUTE_r(DEBUG_s(
- PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n",
- (IV)(PL_stack_sp - PL_stack_base));
- ));
- SAVESTACK_CXPOS();
- cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base;
- /* Otherwise OP_NEXTSTATE will free whatever on stack now. */
- SAVETMPS;
- /* Apparently this is not needed, judging by wantarray. */
- /* SAVEI8(cxstack[cxstack_ix].blk_gimme);
- cxstack[cxstack_ix].blk_gimme = G_SCALAR; */
-
- if (reginfo->sv) {
- /* Make $_ available to executed code. */
- if (reginfo->sv != DEFSV) {
- SAVE_DEFSV;
- DEFSV_set(reginfo->sv);
- }
-
- if (!(SvTYPE(reginfo->sv) >= SVt_PVMG && SvMAGIC(reginfo->sv)
- && (mg = mg_find(reginfo->sv, PERL_MAGIC_regex_global)))) {
- /* prepare for quick setting of pos */
-#ifdef PERL_OLD_COPY_ON_WRITE
- if (SvIsCOW(reginfo->sv))
- sv_force_normal_flags(reginfo->sv, 0);
-#endif
- mg = sv_magicext(reginfo->sv, NULL, PERL_MAGIC_regex_global,
- &PL_vtbl_mglob, NULL, 0);
- mg->mg_len = -1;
- }
- PL_reg_magic = mg;
- PL_reg_oldpos = mg->mg_len;
- SAVEDESTRUCTOR_X(restore_pos, prog);
- }
- if (!PL_reg_curpm) {
- Newxz(PL_reg_curpm, 1, PMOP);
-#ifdef USE_ITHREADS
- {
- SV* const repointer = &PL_sv_undef;
- /* this regexp is also owned by the new PL_reg_curpm, which
- will try to free it. */
- av_push(PL_regex_padav, repointer);
- PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav);
- PL_regex_pad = AvARRAY(PL_regex_padav);
- }
-#endif
- }
-#ifdef USE_ITHREADS
- /* It seems that non-ithreads works both with and without this code.
- So for efficiency reasons it seems best not to have the code
- compiled when it is not needed. */
- /* This is safe against NULLs: */
- ReREFCNT_dec(PM_GETRE(PL_reg_curpm));
- /* PM_reg_curpm owns a reference to this regexp. */
- ReREFCNT_inc(rx);
-#endif
- PM_SETRE(PL_reg_curpm, rx);
- PL_reg_oldcurpm = PL_curpm;
- PL_curpm = PL_reg_curpm;
- if (RXp_MATCH_COPIED(prog)) {
- /* Here is a serious problem: we cannot rewrite subbeg,
- since it may be needed if this match fails. Thus
- $` inside (?{}) could fail... */
- PL_reg_oldsaved = prog->subbeg;
- PL_reg_oldsavedlen = prog->sublen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = prog->saved_copy;
-#endif
- RXp_MATCH_COPIED_off(prog);
- }
- else
- PL_reg_oldsaved = NULL;
- prog->subbeg = PL_bostr;
- prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */
- }
- DEBUG_EXECUTE_r(PL_reg_starttry = *startpos);
- prog->offs[0].start = *startpos - PL_bostr;
- PL_reginput = *startpos;
- PL_reglastparen = &prog->lastparen;
- PL_reglastcloseparen = &prog->lastcloseparen;
- prog->lastparen = 0;
- prog->lastcloseparen = 0;
- PL_regsize = 0;
- PL_regoffs = prog->offs;
- if (PL_reg_start_tmpl <= prog->nparens) {
- PL_reg_start_tmpl = prog->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- /* XXXX What this code is doing here?!!! There should be no need
- to do this again and again, PL_reglastparen should take care of
- this! --ilya*/
-
- /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code.
- * Actually, the code in regcppop() (which Ilya may be meaning by
- * PL_reglastparen), is not needed at all by the test suite
- * (op/regexp, op/pat, op/split), but that code is needed otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * Meanwhile, this code *is* needed for the
- * above-mentioned test suite tests to succeed. The common theme
- * on those tests seems to be returning null fields from matches.
- * --jhi updated by dapm */
-#if 1
- if (prog->nparens) {
- regexp_paren_pair *pp = PL_regoffs;
- register I32 i;
- for (i = prog->nparens; i > (I32)*PL_reglastparen; i--) {
- ++pp;
- pp->start = -1;
- pp->end = -1;
- }
- }
-#endif
- REGCP_SET(lastcp);
- if (regmatch(reginfo, progi->program + 1)) {
- PL_regoffs[0].end = PL_reginput - PL_bostr;
- return 1;
- }
- if (reginfo->cutpoint)
- *startpos= reginfo->cutpoint;
- REGCP_UNWIND(lastcp);
- return 0;
-}
-
-
-#define sayYES goto yes
-#define sayNO goto no
-#define sayNO_SILENT goto no_silent
-
-/* we dont use STMT_START/END here because it leads to
- "unreachable code" warnings, which are bogus, but distracting. */
-#define CACHEsayNO \
- if (ST.cache_mask) \
- PL_reg_poscache[ST.cache_offset] |= ST.cache_mask; \
- sayNO
-
-/* this is used to determine how far from the left messages like
- 'failed...' are printed. It should be set such that messages
- are inline with the regop output that created them.
-*/
-#define REPORT_CODE_OFF 32
-
-
-/* Make sure there is a test for this +1 options in re_tests */
-#define TRIE_INITAL_ACCEPT_BUFFLEN 4;
-
-#define CHRTEST_UNINIT -1001 /* c1/c2 haven't been calculated yet */
-#define CHRTEST_VOID -1000 /* the c1/c2 "next char" test should be skipped */
-
-#define SLAB_FIRST(s) (&(s)->states[0])
-#define SLAB_LAST(s) (&(s)->states[PERL_REGMATCH_SLAB_SLOTS-1])
-
-/* grab a new slab and return the first slot in it */
-
-STATIC regmatch_state *
-S_push_slab(pTHX)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- regmatch_slab *s = PL_regmatch_slab->next;
- if (!s) {
- Newx(s, 1, regmatch_slab);
- s->prev = PL_regmatch_slab;
- s->next = NULL;
- PL_regmatch_slab->next = s;
- }
- PL_regmatch_slab = s;
- return SLAB_FIRST(s);
-}
-
-
-/* push a new state then goto it */
-
-#define PUSH_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_state;
-
-/* push a new state with success backtracking, then goto it */
-
-#define PUSH_YES_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_yes_state;
-
-
-
-/*
-
-regmatch() - main matching routine
-
-This is basically one big switch statement in a loop. We execute an op,
-set 'next' to point the next op, and continue. If we come to a point which
-we may need to backtrack to on failure such as (A|B|C), we push a
-backtrack state onto the backtrack stack. On failure, we pop the top
-state, and re-enter the loop at the state indicated. If there are no more
-states to pop, we return failure.
-
-Sometimes we also need to backtrack on success; for example /A+/, where
-after successfully matching one A, we need to go back and try to
-match another one; similarly for lookahead assertions: if the assertion
-completes successfully, we backtrack to the state just before the assertion
-and then carry on. In these cases, the pushed state is marked as
-'backtrack on success too'. This marking is in fact done by a chain of
-pointers, each pointing to the previous 'yes' state. On success, we pop to
-the nearest yes state, discarding any intermediate failure-only states.
-Sometimes a yes state is pushed just to force some cleanup code to be
-called at the end of a successful match or submatch; e.g. (??{$re}) uses
-it to free the inner regex.
-
-Note that failure backtracking rewinds the cursor position, while
-success backtracking leaves it alone.
-
-A pattern is complete when the END op is executed, while a subpattern
-such as (?=foo) is complete when the SUCCESS op is executed. Both of these
-ops trigger the "pop to last yes state if any, otherwise return true"
-behaviour.
-
-A common convention in this function is to use A and B to refer to the two
-subpatterns (or to the first nodes thereof) in patterns like /A*B/: so A is
-the subpattern to be matched possibly multiple times, while B is the entire
-rest of the pattern. Variable and state names reflect this convention.
-
-The states in the main switch are the union of ops and failure/success of
-substates associated with with that op. For example, IFMATCH is the op
-that does lookahead assertions /(?=A)B/ and so the IFMATCH state means
-'execute IFMATCH'; while IFMATCH_A is a state saying that we have just
-successfully matched A and IFMATCH_A_fail is a state saying that we have
-just failed to match A. Resume states always come in pairs. The backtrack
-state we push is marked as 'IFMATCH_A', but when that is popped, we resume
-at IFMATCH_A or IFMATCH_A_fail, depending on whether we are backtracking
-on success or failure.
-
-The struct that holds a backtracking state is actually a big union, with
-one variant for each major type of op. The variable st points to the
-top-most backtrack struct. To make the code clearer, within each
-block of code we #define ST to alias the relevant union.
-
-Here's a concrete example of a (vastly oversimplified) IFMATCH
-implementation:
-
- switch (state) {
- ....
-
-#define ST st->u.ifmatch
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- ST.foo = ...; // some state we wish to save
- ...
- // push a yes backtrack state with a resume value of
- // IFMATCH_A/IFMATCH_A_fail, then continue execution at the
- // first node of A:
- PUSH_YES_STATE_GOTO(IFMATCH_A, A);
- // NOTREACHED
-
- case IFMATCH_A: // we have successfully executed A; now continue with B
- next = B;
- bar = ST.foo; // do something with the preserved value
- break;
-
- case IFMATCH_A_fail: // A failed, so the assertion failed
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
-
-#undef ST
-
- ...
- }
-
-For any old-timers reading this who are familiar with the old recursive
-approach, the code above is equivalent to:
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- {
- int foo = ...
- ...
- if (regmatch(A)) {
- next = B;
- bar = foo;
- break;
- }
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
- }
-
-The topmost backtrack state, pointed to by st, is usually free. If you
-want to claim it, populate any ST.foo fields in it with values you wish to
-save, then do one of
-
- PUSH_STATE_GOTO(resume_state, node);
- PUSH_YES_STATE_GOTO(resume_state, node);
-
-which sets that backtrack state's resume value to 'resume_state', pushes a
-new free entry to the top of the backtrack stack, then goes to 'node'.
-On backtracking, the free slot is popped, and the saved state becomes the
-new free state. An ST.foo field in this new top state can be temporarily
-accessed to retrieve values, but once the main loop is re-entered, it
-becomes available for reuse.
-
-Note that the depth of the backtrack stack constantly increases during the
-left-to-right execution of the pattern, rather than going up and down with
-the pattern nesting. For example the stack is at its maximum at Z at the
-end of the pattern, rather than at X in the following:
-
- /(((X)+)+)+....(Y)+....Z/
-
-The only exceptions to this are lookahead/behind assertions and the cut,
-(?>A), which pop all the backtrack states associated with A before
-continuing.
-
-Bascktrack state structs are allocated in slabs of about 4K in size.
-PL_regmatch_state and st always point to the currently active state,
-and PL_regmatch_slab points to the slab currently containing
-PL_regmatch_state. The first time regmatch() is called, the first slab is
-allocated, and is never freed until interpreter destruction. When the slab
-is full, a new one is allocated and chained to the end. At exit from
-regmatch(), slabs allocated since entry are freed.
-
-*/
-
-
-#define DEBUG_STATE_pp(pp) \
- DEBUG_STATE_r({ \
- DUMP_EXEC_POS(locinput, scan, do_utf8); \
- PerlIO_printf(Perl_debug_log, \
- " %*s"pp" %s%s%s%s%s\n", \
- depth*2, "", \
- PL_reg_name[st->resume_state], \
- ((st==yes_state||st==mark_state) ? "[" : ""), \
- ((st==yes_state) ? "Y" : ""), \
- ((st==mark_state) ? "M" : ""), \
- ((st==yes_state||st==mark_state) ? "]" : "") \
- ); \
- });
-
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-prog) : -1)
-
-#ifdef DEBUGGING
-
-STATIC void
-S_debug_start_match(pTHX_ const REGEXP *prog, const bool do_utf8,
- const char *start, const char *end, const char *blurb)
-{
- const bool utf8_pat = RX_UTF8(prog) ? 1 : 0;
-
- PERL_ARGS_ASSERT_DEBUG_START_MATCH;
-
- if (!PL_colorset)
- reginitcolors();
- {
- RE_PV_QUOTED_DECL(s0, utf8_pat, PERL_DEBUG_PAD_ZERO(0),
- RX_PRECOMP_const(prog), RX_PRELEN(prog), 60);
-
- RE_PV_QUOTED_DECL(s1, do_utf8, PERL_DEBUG_PAD_ZERO(1),
- start, end - start, 60);
-
- PerlIO_printf(Perl_debug_log,
- "%s%s REx%s %s against %s\n",
- PL_colors[4], blurb, PL_colors[5], s0, s1);
-
- if (do_utf8||utf8_pat)
- PerlIO_printf(Perl_debug_log, "UTF-8 %s%s%s...\n",
- utf8_pat ? "pattern" : "",
- utf8_pat && do_utf8 ? " and " : "",
- do_utf8 ? "string" : ""
- );
- }
-}
-
-STATIC void
-S_dump_exec_pos(pTHX_ const char *locinput,
- const regnode *scan,
- const char *loc_regeol,
- const char *loc_bostr,
- const char *loc_reg_starttry,
- const bool do_utf8)
-{
- const int docolor = *PL_colors[0] || *PL_colors[2] || *PL_colors[4];
- const int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */
- int l = (loc_regeol - locinput) > taill ? taill : (loc_regeol - locinput);
- /* The part of the string before starttry has one color
- (pref0_len chars), between starttry and current
- position another one (pref_len - pref0_len chars),
- after the current position the third one.
- We assume that pref0_len <= pref_len, otherwise we
- decrease pref0_len. */
- int pref_len = (locinput - loc_bostr) > (5 + taill) - l
- ? (5 + taill) - l : locinput - loc_bostr;
- int pref0_len;
-
- PERL_ARGS_ASSERT_DUMP_EXEC_POS;
-
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len)))
- pref_len++;
- pref0_len = pref_len - (locinput - loc_reg_starttry);
- if (l + pref_len < (5 + taill) && l < loc_regeol - locinput)
- l = ( loc_regeol - locinput > (5 + taill) - pref_len
- ? (5 + taill) - pref_len : loc_regeol - locinput);
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput + l)))
- l--;
- if (pref0_len < 0)
- pref0_len = 0;
- if (pref0_len > pref_len)
- pref0_len = pref_len;
- {
- const int is_uni = (do_utf8 && OP(scan) != CANY) ? 1 : 0;
-
- RE_PV_COLOR_DECL(s0,len0,is_uni,PERL_DEBUG_PAD(0),
- (locinput - pref_len),pref0_len, 60, 4, 5);
-
- RE_PV_COLOR_DECL(s1,len1,is_uni,PERL_DEBUG_PAD(1),
- (locinput - pref_len + pref0_len),
- pref_len - pref0_len, 60, 2, 3);
-
- RE_PV_COLOR_DECL(s2,len2,is_uni,PERL_DEBUG_PAD(2),
- locinput, loc_regeol - locinput, 10, 0, 1);
-
- const STRLEN tlen=len0+len1+len2;
- PerlIO_printf(Perl_debug_log,
- "%4"IVdf" <%.*s%.*s%s%.*s>%*s|",
- (IV)(locinput - loc_bostr),
- len0, s0,
- len1, s1,
- (docolor ? "" : "> <"),
- len2, s2,
- (int)(tlen > 19 ? 0 : 19 - tlen),
- "");
- }
-}
-
-#endif
-
-/* reg_check_named_buff_matched()
- * Checks to see if a named buffer has matched. The data array of
- * buffer numbers corresponding to the buffer is expected to reside
- * in the regexp->data->data array in the slot stored in the ARG() of
- * node involved. Note that this routine doesn't actually care about the
- * name, that information is not preserved from compilation to execution.
- * Returns the index of the leftmost defined buffer with the given name
- * or 0 if non of the buffers matched.
- */
-STATIC I32
-S_reg_check_named_buff_matched(pTHX_ const regexp *rex, const regnode *scan)
-{
- I32 n;
- RXi_GET_DECL(rex,rexi);
- SV *sv_dat= MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
-
- PERL_ARGS_ASSERT_REG_CHECK_NAMED_BUFF_MATCHED;
-
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- if ((I32)*PL_reglastparen >= nums[n] &&
- PL_regoffs[nums[n]].end != -1)
- {
- return nums[n];
- }
- }
- return 0;
-}
-
-
-/* free all slabs above current one - called during LEAVE_SCOPE */
-
-STATIC void
-S_clear_backtrack_stack(pTHX_ void *p)
-{
- regmatch_slab *s = PL_regmatch_slab->next;
- PERL_UNUSED_ARG(p);
-
- if (!s)
- return;
- PL_regmatch_slab->next = NULL;
- while (s) {
- regmatch_slab * const osl = s;
- s = s->next;
- Safefree(osl);
- }
-}
-
-
-#define SETREX(Re1,Re2) \
- if (PL_reg_eval_set) PM_SETRE((PL_reg_curpm), (Re2)); \
- Re1 = (Re2)
-
-STATIC I32 /* 0 failure, 1 success */
-S_regmatch(pTHX_ regmatch_info *reginfo, regnode *prog)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- dVAR;
- register const bool do_utf8 = PL_reg_match_utf8;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- REGEXP *rex_sv = reginfo->prog;
- regexp *rex = (struct regexp *)SvANY(rex_sv);
- RXi_GET_DECL(rex,rexi);
- I32 oldsave;
- /* the current state. This is a cached copy of PL_regmatch_state */
- register regmatch_state *st;
- /* cache heavy used fields of st in registers */
- register regnode *scan;
- register regnode *next;
- register U32 n = 0; /* general value; init to avoid compiler warning */
- register I32 ln = 0; /* len or last; init to avoid compiler warning */
- register char *locinput = PL_reginput;
- register I32 nextchr; /* is always set to UCHARAT(locinput) */
-
- bool result = 0; /* return value of S_regmatch */
- int depth = 0; /* depth of backtrack stack */
- U32 nochange_depth = 0; /* depth of GOSUB recursion with nochange */
- const U32 max_nochange_depth =
- (3 * rex->nparens > MAX_RECURSE_EVAL_NOCHANGE_DEPTH) ?
- 3 * rex->nparens : MAX_RECURSE_EVAL_NOCHANGE_DEPTH;
- regmatch_state *yes_state = NULL; /* state to pop to on success of
- subpattern */
- /* mark_state piggy backs on the yes_state logic so that when we unwind
- the stack on success we can update the mark_state as we go */
- regmatch_state *mark_state = NULL; /* last mark state we have seen */
- regmatch_state *cur_eval = NULL; /* most recent EVAL_AB state */
- struct regmatch_state *cur_curlyx = NULL; /* most recent curlyx */
- U32 state_num;
- bool no_final = 0; /* prevent failure from backtracking? */
- bool do_cutgroup = 0; /* no_final only until next branch/trie entry */
- char *startpoint = PL_reginput;
- SV *popmark = NULL; /* are we looking for a mark? */
- SV *sv_commit = NULL; /* last mark name seen in failure */
- SV *sv_yes_mark = NULL; /* last mark name we have seen
- during a successfull match */
- U32 lastopen = 0; /* last open we saw */
- bool has_cutgroup = RX_HAS_CUTGROUP(rex) ? 1 : 0;
- SV* const oreplsv = GvSV(PL_replgv);
- /* these three flags are set by various ops to signal information to
- * the very next op. They have a useful lifetime of exactly one loop
- * iteration, and are not preserved or restored by state pushes/pops
- */
- bool sw = 0; /* the condition value in (?(cond)a|b) */
- bool minmod = 0; /* the next "{n,m}" is a "{n,m}?" */
- int logical = 0; /* the following EVAL is:
- 0: (?{...})
- 1: (?(?{...})X|Y)
- 2: (??{...})
- or the following IFMATCH/UNLESSM is:
- false: plain (?=foo)
- true: used as a condition: (?(?=foo))
- */
-#ifdef DEBUGGING
- GET_RE_DEBUG_FLAGS_DECL;
-#endif
-
- PERL_ARGS_ASSERT_REGMATCH;
-
- DEBUG_OPTIMISE_r( DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,"regmatch start\n");
- }));
- /* on first ever call to regmatch, allocate first slab */
- if (!PL_regmatch_slab) {
- Newx(PL_regmatch_slab, 1, regmatch_slab);
- PL_regmatch_slab->prev = NULL;
- PL_regmatch_slab->next = NULL;
- PL_regmatch_state = SLAB_FIRST(PL_regmatch_slab);
- }
-
- oldsave = PL_savestack_ix;
- SAVEDESTRUCTOR_X(S_clear_backtrack_stack, NULL);
- SAVEVPTR(PL_regmatch_slab);
- SAVEVPTR(PL_regmatch_state);
-
- /* grab next free state slot */
- st = ++PL_regmatch_state;
- if (st > SLAB_LAST(PL_regmatch_slab))
- st = PL_regmatch_state = S_push_slab(aTHX);
-
- /* Note that nextchr is a byte even in UTF */
- nextchr = UCHARAT(locinput);
- scan = prog;
- while (scan != NULL) {
-
- DEBUG_EXECUTE_r( {
- SV * const prop = sv_newmortal();
- regnode *rnext=regnext(scan);
- DUMP_EXEC_POS( locinput, scan, do_utf8 );
- regprop(rex, prop, scan);
-
- PerlIO_printf(Perl_debug_log,
- "%3"IVdf":%*s%s(%"IVdf")\n",
- (IV)(scan - rexi->program), depth*2, "",
- SvPVX_const(prop),
- (PL_regkind[OP(scan)] == END || !rnext) ?
- 0 : (IV)(rnext - rexi->program));
- });
-
- next = scan + NEXT_OFF(scan);
- if (next == scan)
- next = NULL;
- state_num = OP(scan);
-
- REH_CALL_EXEC_NODE_HOOK(rex, scan, reginfo, st);
- reenter_switch:
-
- assert(PL_reglastparen == &rex->lastparen);
- assert(PL_reglastcloseparen == &rex->lastcloseparen);
- assert(PL_regoffs == rex->offs);
-
- switch (state_num) {
- case BOL:
- if (locinput == PL_bostr)
- {
- /* reginfo->till = reginfo->bol; */
- break;
- }
- sayNO;
- case MBOL:
- if (locinput == PL_bostr ||
- ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n'))
- {
- break;
- }
- sayNO;
- case SBOL:
- if (locinput == PL_bostr)
- break;
- sayNO;
- case GPOS:
- if (locinput == reginfo->ganch)
- break;
- sayNO;
-
- case KEEPS:
- /* update the startpoint */
- st->u.keeper.val = PL_regoffs[0].start;
- PL_reginput = locinput;
- PL_regoffs[0].start = locinput - PL_bostr;
- PUSH_STATE_GOTO(KEEPS_next, next);
- /*NOT-REACHED*/
- case KEEPS_next_fail:
- /* rollback the start point change */
- PL_regoffs[0].start = st->u.keeper.val;
- sayNO_SILENT;
- /*NOT-REACHED*/
- case EOL:
- goto seol;
- case MEOL:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- break;
- case SEOL:
- seol:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- if (PL_regeol - locinput > 1)
- sayNO;
- break;
- case EOS:
- if (PL_regeol != locinput)
- sayNO;
- break;
- case SANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
- case CANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case REG_ANY:
- if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n')
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
-
-#undef ST
-#define ST st->u.trie
- case TRIEC:
- /* In this case the charclass data is available inline so
- we can fail fast without a lot of extra overhead.
- */
- if (scan->flags == EXACT || !do_utf8) {
- if(!ANYOF_BITMAP_TEST(scan, *locinput)) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case TRIE:
- {
- /* what type of TRIE am I? (utf8 makes this contextual) */
- DECL_TRIE_TYPE(scan);
-
- /* what trie are we using right now */
- reg_trie_data * const trie
- = (reg_trie_data*)rexi->data->data[ ARG( scan ) ];
- HV * widecharmap = MUTABLE_HV(rexi->data->data[ ARG( scan ) + 1 ]);
- U32 state = trie->startstate;
-
- if (trie->bitmap && trie_type != trie_utf8_fold &&
- !TRIE_BITMAP_TEST(trie,*locinput)
- ) {
- if (trie->states[ state ].wordnum) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %smatched empty string...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- break;
- } else {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- }
- }
-
- {
- U8 *uc = ( U8* )locinput;
-
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- STRLEN bufflen=0;
- SV *sv_accept_buff = NULL;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- ST.accepted = 0; /* how many accepting states we have seen */
- ST.B = next;
- ST.jump = trie->jump;
- ST.me = scan;
- /*
- traverse the TRIE keeping track of all accepting states
- we transition through until we get to a failing node.
- */
-
- while ( state && uc <= (U8*)PL_regeol ) {
- U32 base = trie->states[ state ].trans.base;
- UV uvc = 0;
- U16 charid;
- /* We use charid to hold the wordnum as we don't use it
- for charid until after we have done the wordnum logic.
- We define an alias just so that the wordnum logic reads
- more naturally. */
-
-#define got_wordnum charid
- got_wordnum = trie->states[ state ].wordnum;
-
- if ( got_wordnum ) {
- if ( ! ST.accepted ) {
- ENTER;
- SAVETMPS; /* XXX is this necessary? dmq */
- bufflen = TRIE_INITAL_ACCEPT_BUFFLEN;
- sv_accept_buff=newSV(bufflen *
- sizeof(reg_trie_accepted) - 1);
- SvCUR_set(sv_accept_buff, 0);
- SvPOK_on(sv_accept_buff);
- sv_2mortal(sv_accept_buff);
- SAVETMPS;
- ST.accept_buff =
- (reg_trie_accepted*)SvPV_nolen(sv_accept_buff );
- }
- do {
- if (ST.accepted >= bufflen) {
- bufflen *= 2;
- ST.accept_buff =(reg_trie_accepted*)
- SvGROW(sv_accept_buff,
- bufflen * sizeof(reg_trie_accepted));
- }
- SvCUR_set(sv_accept_buff,SvCUR(sv_accept_buff)
- + sizeof(reg_trie_accepted));
-
-
- ST.accept_buff[ST.accepted].wordnum = got_wordnum;
- ST.accept_buff[ST.accepted].endpos = uc;
- ++ST.accepted;
- } while (trie->nextword && (got_wordnum= trie->nextword[got_wordnum]));
- }
-#undef got_wordnum
-
- DEBUG_TRIE_EXECUTE_r({
- DUMP_EXEC_POS( (char *)uc, scan, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%*s %sState: %4"UVxf" Accepted: %4"UVxf" ",
- 2+depth * 2, "", PL_colors[4],
- (UV)state, (UV)ST.accepted );
- });
-
- if ( base ) {
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
-
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state)
- {
- state = trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next;
- }
- else {
- state = 0;
- }
- uc += len;
-
- }
- else {
- state = 0;
- }
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "Charid:%3x CP:%4"UVxf" After State: %4"UVxf"%s\n",
- charid, uvc, (UV)state, PL_colors[5] );
- );
- }
- if (!ST.accepted )
- sayNO;
-
- DEBUG_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" possible matches%s\n",
- REPORT_CODE_OFF + depth * 2, "",
- PL_colors[4], (IV)ST.accepted, PL_colors[5] );
- );
- }}
- goto trie_first_try; /* jump into the fail handler */
- /* NOTREACHED */
- case TRIE_next_fail: /* we failed - try next alterative */
- if ( ST.jump) {
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- }
- trie_first_try:
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
-
- if ( ST.jump) {
- ST.lastparen = *PL_reglastparen;
- REGCP_SET(ST.cp);
- }
- if ( ST.accepted == 1 ) {
- /* only one choice left - just continue */
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ 0 ].wordnum-1, 0 );
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %sonly one match left: #%d <%s>%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[ 0 ].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- )
- : "not compiled under -Dr",
- PL_colors[5] );
- });
- PL_reginput = (char *)ST.accept_buff[ 0 ].endpos;
- /* in this case we free tmps/leave before we call regmatch
- as we wont be using accept_buff again. */
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- if ( !ST.jump || !ST.jump[ST.accept_buff[0].wordnum])
- scan = ST.B;
- else
- scan = ST.me + ST.jump[ST.accept_buff[0].wordnum];
- if (!has_cutgroup) {
- FREETMPS;
- LEAVE;
- } else {
- ST.accepted--;
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- }
-
- continue; /* execute rest of RE */
- }
-
- if ( !ST.accepted-- ) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sTRIE failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- FREETMPS;
- LEAVE;
- sayNO_SILENT;
- /*NOTREACHED*/
- }
-
- /*
- There are at least two accepting states left. Presumably
- the number of accepting states is going to be low,
- typically two. So we simply scan through to find the one
- with lowest wordnum. Once we find it, we swap the last
- state into its place and decrement the size. We then try to
- match the rest of the pattern at the point where the word
- ends. If we succeed, control just continues along the
- regex; if we fail we return here to try the next accepting
- state
- */
-
- {
- U32 best = 0;
- U32 cur;
- for( cur = 1 ; cur <= ST.accepted ; cur++ ) {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" (%d) as best, looking at %"IVdf" (%d)%s\n",
- REPORT_CODE_OFF + depth * 2, "", PL_colors[4],
- (IV)best, ST.accept_buff[ best ].wordnum, (IV)cur,
- ST.accept_buff[ cur ].wordnum, PL_colors[5] );
- );
-
- if (ST.accept_buff[cur].wordnum <
- ST.accept_buff[best].wordnum)
- best = cur;
- }
-
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ best ].wordnum - 1, 0 );
- regnode *nextop=(!ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) ?
- ST.B :
- ST.me + ST.jump[ST.accept_buff[best].wordnum];
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %strying alternation #%d <%s> at node #%d %s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[best].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- ) : "not compiled under -Dr",
- REG_NODE_NUM(nextop),
- PL_colors[5] );
- });
-
- if ( best<ST.accepted ) {
- reg_trie_accepted tmp = ST.accept_buff[ best ];
- ST.accept_buff[ best ] = ST.accept_buff[ ST.accepted ];
- ST.accept_buff[ ST.accepted ] = tmp;
- best = ST.accepted;
- }
- PL_reginput = (char *)ST.accept_buff[ best ].endpos;
- if ( !ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) {
- scan = ST.B;
- } else {
- scan = ST.me + ST.jump[ST.accept_buff[best].wordnum];
- }
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- /* NOTREACHED */
- }
- /* NOTREACHED */
- case TRIE_next:
- /* we dont want to throw this away, see bug 57042*/
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- FREETMPS;
- LEAVE;
- sayYES;
-#undef ST
-
- case EXACT: {
- char *s = STRING(scan);
- ln = STR_LEN(scan);
- if (do_utf8 != UTF) {
- /* The target and the pattern have differing utf8ness. */
- char *l = locinput;
- const char * const e = s + ln;
-
- if (do_utf8) {
- /* The target is utf8, the pattern is not utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*(U8*)s) !=
- utf8n_to_uvuni((U8*)l, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- l += ulen;
- s ++;
- }
- }
- else {
- /* The target is not utf8, the pattern is utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*((U8*)l)) !=
- utf8n_to_uvuni((U8*)s, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- s += ulen;
- l ++;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
- /* The target and the pattern have the same utf8ness. */
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr)
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && memNE(s, locinput, ln))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case EXACTFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case EXACTF: {
- char * const s = STRING(scan);
- ln = STR_LEN(scan);
-
- if (do_utf8 || UTF) {
- /* Either target or the pattern are utf8. */
- const char * const l = locinput;
- char *e = PL_regeol;
-
- if (ibcmp_utf8(s, 0, ln, (bool)UTF,
- l, &e, 0, do_utf8)) {
- /* One more case for the sharp s:
- * pack("U0U*", 0xDF) =~ /ss/i,
- * the 0xC3 0x9F are the UTF-8
- * byte sequence for the U+00DF. */
-
- if (!(do_utf8 &&
- toLOWER(s[0]) == 's' &&
- ln >= 2 &&
- toLOWER(s[1]) == 's' &&
- (U8)l[0] == 0xC3 &&
- e - l >= 2 &&
- (U8)l[1] == 0x9F))
- sayNO;
- }
- locinput = e;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Neither the target and the pattern are utf8. */
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- UCHARAT(s) != ((OP(scan) == EXACTF)
- ? PL_fold : PL_fold_locale)[nextchr])
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && (OP(scan) == EXACTF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln)))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case BOUNDL:
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- case NBOUND:
- /* was last char in word? */
- if (do_utf8) {
- if (locinput == PL_bostr)
- ln = '\n';
- else {
- const U8 * const r = reghop3((U8*)locinput, -1, (U8*)PL_bostr);
-
- ln = utf8n_to_uvchr(r, UTF8SKIP(r), 0, uniflags);
- }
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM_uni(ln);
- LOAD_UTF8_CHARCLASS_ALNUM();
- n = swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8);
- }
- else {
- ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln));
- n = isALNUM_LC_utf8((U8*)locinput);
- }
- }
- else {
- ln = (locinput != PL_bostr) ?
- UCHARAT(locinput - 1) : '\n';
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM(ln);
- n = isALNUM(nextchr);
- }
- else {
- ln = isALNUM_LC(ln);
- n = isALNUM_LC(nextchr);
- }
- }
- if (((!ln) == (!n)) == (OP(scan) == BOUND ||
- OP(scan) == BOUNDL))
- sayNO;
- break;
- case ANYOF:
- if (do_utf8) {
- STRLEN inclasslen = PL_regeol - locinput;
-
- if (!reginclass(rex, scan, (U8*)locinput, &inclasslen, do_utf8))
- goto anyof_fail;
- if (locinput >= PL_regeol)
- sayNO;
- locinput += inclasslen ? inclasslen : UTF8SKIP(locinput);
- nextchr = UCHARAT(locinput);
- break;
- }
- else {
- if (nextchr < 0)
- nextchr = UCHARAT(locinput);
- if (!REGINCLASS(rex, scan, (U8*)locinput))
- goto anyof_fail;
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- }
- anyof_fail:
- /* If we might have the case of the German sharp s
- * in a casefolding Unicode character class. */
-
- if (ANYOF_FOLD_SHARP_S(scan, locinput, PL_regeol)) {
- locinput += SHARP_S_SKIP;
- nextchr = UCHARAT(locinput);
- }
- else
- sayNO;
- break;
- /* Special char classes - The defines start on line 129 or so */
- CCC_TRY_AFF( ALNUM, ALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
- CCC_TRY_NEG(NALNUM, NALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
-
- CCC_TRY_AFF( SPACE, SPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
- CCC_TRY_NEG(NSPACE, NSPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
-
- CCC_TRY_AFF( DIGIT, DIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
- CCC_TRY_NEG(NDIGIT, NDIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
-
- case CLUMP: /* Match \X: logical Unicode character. This is defined as
- a Unicode extended Grapheme Cluster */
- /* From http://www.unicode.org/reports/tr29 (5.2 version). An
- extended Grapheme Cluster is:
-
- CR LF
- | Prepend* Begin Extend*
- | .
-
- Begin is (Hangul-syllable | ! Control)
- Extend is (Grapheme_Extend | Spacing_Mark)
- Control is [ GCB_Control CR LF ]
-
- The discussion below shows how the code for CLUMP is derived
- from this regex. Note that most of these concepts are from
- property values of the Grapheme Cluster Boundary (GCB) property.
- No code point can have multiple property values for a given
- property. Thus a code point in Prepend can't be in Control, but
- it must be in !Control. This is why Control above includes
- GCB_Control plus CR plus LF. The latter two are used in the GCB
- property separately, and so can't be in GCB_Control, even though
- they logically are controls. Control is not the same as gc=cc,
- but includes format and other characters as well.
-
- The Unicode definition of Hangul-syllable is:
- L+
- | (L* ( ( V | LV ) V* | LVT ) T*)
- | T+
- )
- Each of these is a value for the GCB property, and hence must be
- disjoint, so the order they are tested is immaterial, so the
- above can safely be changed to
- T+
- | L+
- | (L* ( LVT | ( V | LV ) V*) T*)
-
- The last two terms can be combined like this:
- L* ( L
- | (( LVT | ( V | LV ) V*) T*))
-
- And refactored into this:
- L* (L | LVT T* | V V* T* | LV V* T*)
-
- That means that if we have seen any L's at all we can quit
- there, but if the next character is a LVT, a V or and LV we
- should keep going.
-
- There is a subtlety with Prepend* which showed up in testing.
- Note that the Begin, and only the Begin is required in:
- | Prepend* Begin Extend*
- Also, Begin contains '! Control'. A Prepend must be a '!
- Control', which means it must be a Begin. What it comes down to
- is that if we match Prepend* and then find no suitable Begin
- afterwards, that if we backtrack the last Prepend, that one will
- be a suitable Begin.
- */
-
- if (locinput >= PL_regeol)
- sayNO;
- if (! do_utf8) {
-
- /* Match either CR LF or '.', as all the other possibilities
- * require utf8 */
- locinput++; /* Match the . or CR */
- if (nextchr == '\r'
- && locinput < PL_regeol
- && UCHARAT(locinput) == '\n') locinput++;
- }
- else {
-
- /* Utf8: See if is ( CR LF ); already know that locinput <
- * PL_regeol, so locinput+1 is in bounds */
- if (nextchr == '\r' && UCHARAT(locinput + 1) == '\n') {
- locinput += 2;
- }
- else {
- /* In case have to backtrack to beginning, then match '.' */
- char *starting = locinput;
-
- /* In case have to backtrack the last prepend */
- char *previous_prepend = 0;
-
- LOAD_UTF8_CHARCLASS_GCB();
-
- /* Match (prepend)* */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_prepend,
- (U8*)locinput, do_utf8))
- {
- previous_prepend = locinput;
- locinput += UTF8SKIP(locinput);
- }
-
- /* As noted above, if we matched a prepend character, but
- * the next thing won't match, back off the last prepend we
- * matched, as it is guaranteed to match the begin */
- if (previous_prepend
- && (locinput >= PL_regeol
- || ! swash_fetch(PL_utf8_X_begin,
- (U8*)locinput, do_utf8)))
- {
- locinput = previous_prepend;
- }
-
- /* Note that here we know PL_regeol > locinput, as we
- * tested that upon input to this switch case, and if we
- * moved locinput forward, we tested the result just above
- * and it either passed, or we backed off so that it will
- * now pass */
- if (! swash_fetch(PL_utf8_X_begin, (U8*)locinput, do_utf8)) {
-
- /* Here did not match the required 'Begin' in the
- * second term. So just match the very first
- * character, the '.' of the final term of the regex */
- locinput = starting + UTF8SKIP(starting);
- } else {
-
- /* Here is the beginning of a character that can have
- * an extender. It is either a hangul syllable, or a
- * non-control */
- if (swash_fetch(PL_utf8_X_non_hangul,
- (U8*)locinput, do_utf8))
- {
-
- /* Here not a Hangul syllable, must be a
- * ('! * Control') */
- locinput += UTF8SKIP(locinput);
- } else {
-
- /* Here is a Hangul syllable. It can be composed
- * of several individual characters. One
- * possibility is T+ */
- if (swash_fetch(PL_utf8_X_T,
- (U8*)locinput, do_utf8))
- {
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_T,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- } else {
-
- /* Here, not T+, but is a Hangul. That means
- * it is one of the others: L, LV, LVT or V,
- * and matches:
- * L* (L | LVT T* | V V* T* | LV V* T*) */
-
- /* Match L* */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_L,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
-
- /* Here, have exhausted L*. If the next
- * character is not an LV, LVT nor V, it means
- * we had to have at least one L, so matches L+
- * in the original equation, we have a complete
- * hangul syllable. Are done. */
-
- if (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_LV_LVT_V,
- (U8*)locinput, do_utf8))
- {
-
- /* Otherwise keep going. Must be LV, LVT
- * or V. See if LVT */
- if (swash_fetch(PL_utf8_X_LVT,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- } else {
-
- /* Must be V or LV. Take it, then
- * match V* */
- locinput += UTF8SKIP(locinput);
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_V,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- }
-
- /* And any of LV, LVT, or V can be followed
- * by T* */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_T,
- (U8*)locinput,
- do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- }
- }
- }
-
- /* Match any extender */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_extend,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- }
- }
- if (locinput > PL_regeol) sayNO;
- }
- nextchr = UCHARAT(locinput);
- break;
-
- case NREFFL:
- {
- char *s;
- char type;
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NREF:
- case NREFF:
- type = OP(scan);
- n = reg_check_named_buff_matched(rex,scan);
-
- if ( n ) {
- type = REF + ( type - NREF );
- goto do_ref;
- } else {
- sayNO;
- }
- /* unreached */
- case REFFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case REF:
- case REFF:
- n = ARG(scan); /* which paren pair */
- type = OP(scan);
- do_ref:
- ln = PL_regoffs[n].start;
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (*PL_reglastparen < n || ln == -1)
- sayNO; /* Do not match unless seen CLOSEn. */
- if (ln == PL_regoffs[n].end)
- break;
-
- s = PL_bostr + ln;
- if (do_utf8 && type != REF) { /* REF can do byte comparison */
- char *l = locinput;
- const char *e = PL_bostr + PL_regoffs[n].end;
- /*
- * Note that we can't do the "other character" lookup trick as
- * in the 8-bit case (no pun intended) because in Unicode we
- * have to map both upper and title case to lower case.
- */
- if (type == REFF) {
- while (s < e) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- if (l >= PL_regeol)
- sayNO;
- toLOWER_utf8((U8*)s, tmpbuf1, &ulen1);
- toLOWER_utf8((U8*)l, tmpbuf2, &ulen2);
- if (ulen1 != ulen2 || memNE((char *)tmpbuf1, (char *)tmpbuf2, ulen1))
- sayNO;
- s += ulen1;
- l += ulen2;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- (type == REF ||
- (UCHARAT(s) != (type == REFF
- ? PL_fold : PL_fold_locale)[nextchr])))
- sayNO;
- ln = PL_regoffs[n].end - ln;
- if (locinput + ln > PL_regeol)
- sayNO;
- if (ln > 1 && (type == REF
- ? memNE(s, locinput, ln)
- : (type == REFF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln))))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case NOTHING:
- case TAIL:
- break;
- case BACK:
- break;
-
-#undef ST
-#define ST st->u.eval
- {
- SV *ret;
- REGEXP *re_sv;
- regexp *re;
- regexp_internal *rei;
- regnode *startpoint;
-
- case GOSTART:
- case GOSUB: /* /(...(?1))/ /(...(?&foo))/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if (cur_eval->u.eval.close_paren == (U32)ARG(scan))
- Perl_croak(aTHX_ "Infinite recursion in regex");
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_
- "Pattern subroutine nesting without pos change"
- " exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- re_sv = rex_sv;
- re = rex;
- rei = rexi;
- (void)ReREFCNT_inc(rex_sv);
- if (OP(scan)==GOSUB) {
- startpoint = scan + ARG2L(scan);
- ST.close_paren = ARG(scan);
- } else {
- startpoint = rei->program+1;
- ST.close_paren = 0;
- }
- goto eval_recurse_doit;
- /* NOTREACHED */
- case EVAL: /* /(?{A})B/ /(??{A})B/ and /(?(?{A})X|Y)B/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_ "EVAL without pos change exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- {
- /* execute the code in the {...} */
- dSP;
- SV ** const before = SP;
- OP_4tree * const oop = PL_op;
- COP * const ocurcop = PL_curcop;
- PAD *old_comppad;
- char *saved_regeol = PL_regeol;
-
- n = ARG(scan);
- PL_op = (OP_4tree*)rexi->data->data[n];
- DEBUG_STATE_r( PerlIO_printf(Perl_debug_log,
- " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) );
- PAD_SAVE_LOCAL(old_comppad, (PAD*)rexi->data->data[n + 2]);
- PL_regoffs[0].end = PL_reg_magic->mg_len = locinput - PL_bostr;
-
- if (sv_yes_mark) {
- SV *sv_mrk = get_sv("REGMARK", 1);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- CALLRUNOPS(aTHX); /* Scalar context. */
- SPAGAIN;
- if (SP == before)
- ret = &PL_sv_undef; /* protect against empty (?{}) blocks. */
- else {
- ret = POPs;
- PUTBACK;
- }
-
- PL_op = oop;
- PAD_RESTORE_LOCAL(old_comppad);
- PL_curcop = ocurcop;
- PL_regeol = saved_regeol;
- if (!logical) {
- /* /(?{...})/ */
- sv_setsv(save_scalar(PL_replgv), ret);
- break;
- }
- }
- if (logical == 2) { /* Postponed subexpression: /(??{...})/ */
- logical = 0;
- {
- /* extract RE object from returned value; compiling if
- * necessary */
- MAGIC *mg = NULL;
- REGEXP *rx = NULL;
-
- if (SvROK(ret)) {
- SV *const sv = SvRV(ret);
-
- if (SvTYPE(sv) == SVt_REGEXP) {
- rx = (REGEXP*) sv;
- } else if (SvSMAGICAL(sv)) {
- mg = mg_find(sv, PERL_MAGIC_qr);
- assert(mg);
- }
- } else if (SvTYPE(ret) == SVt_REGEXP) {
- rx = (REGEXP*) ret;
- } else if (SvSMAGICAL(ret)) {
- if (SvGMAGICAL(ret)) {
- /* I don't believe that there is ever qr magic
- here. */
- assert(!mg_find(ret, PERL_MAGIC_qr));
- sv_unmagic(ret, PERL_MAGIC_qr);
- }
- else {
- mg = mg_find(ret, PERL_MAGIC_qr);
- /* testing suggests mg only ends up non-NULL for
- scalars who were upgraded and compiled in the
- else block below. In turn, this is only
- triggered in the "postponed utf8 string" tests
- in t/op/pat.t */
- }
- }
-
- if (mg) {
- rx = (REGEXP *) mg->mg_obj; /*XXX:dmq*/
- assert(rx);
- }
- if (rx) {
- rx = reg_temp_copy(NULL, rx);
- }
- else {
- U32 pm_flags = 0;
- const I32 osize = PL_regsize;
-
- if (DO_UTF8(ret)) {
- assert (SvUTF8(ret));
- } else if (SvUTF8(ret)) {
- /* Not doing UTF-8, despite what the SV says. Is
- this only if we're trapped in use 'bytes'? */
- /* Make a copy of the octet sequence, but without
- the flag on, as the compiler now honours the
- SvUTF8 flag on ret. */
- STRLEN len;
- const char *const p = SvPV(ret, len);
- ret = newSVpvn_flags(p, len, SVs_TEMP);
- }
- rx = CALLREGCOMP(ret, pm_flags);
- if (!(SvFLAGS(ret)
- & (SVs_TEMP | SVs_PADTMP | SVf_READONLY
- | SVs_GMG))) {
- /* This isn't a first class regexp. Instead, it's
- caching a regexp onto an existing, Perl visible
- scalar. */
- sv_magic(ret, MUTABLE_SV(rx), PERL_MAGIC_qr, 0, 0);
- }
- PL_regsize = osize;
- }
- re_sv = rx;
- re = (struct regexp *)SvANY(rx);
- }
- RXp_MATCH_COPIED_off(re);
- re->subbeg = rex->subbeg;
- re->sublen = rex->sublen;
- rei = RXi_GET(re);
- DEBUG_EXECUTE_r(
- debug_start_match(re_sv, do_utf8, locinput, PL_regeol,
- "Matching embedded");
- );
- startpoint = rei->program + 1;
- ST.close_paren = 0; /* only used for GOSUB */
- /* borrowed from regtry */
- if (PL_reg_start_tmpl <= re->nparens) {
- PL_reg_start_tmpl = re->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- eval_recurse_doit: /* Share code with GOSUB below this line */
- /* run the pattern returned from (??{...}) */
- ST.cp = regcppush(0); /* Save *all* the positions. */
- REGCP_SET(ST.lastcp);
-
- PL_regoffs = re->offs; /* essentially NOOP on GOSUB */
-
- /* see regtry, specifically PL_reglast(?:close)?paren is a pointer! (i dont know why) :dmq */
- PL_reglastparen = &re->lastparen;
- PL_reglastcloseparen = &re->lastcloseparen;
- re->lastparen = 0;
- re->lastcloseparen = 0;
-
- PL_reginput = locinput;
- PL_regsize = 0;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
-
- ST.toggle_reg_flags = PL_reg_flags;
- if (RX_UTF8(re_sv))
- PL_reg_flags |= RF_utf8;
- else
- PL_reg_flags &= ~RF_utf8;
- ST.toggle_reg_flags ^= PL_reg_flags; /* diff of old and new */
-
- ST.prev_rex = rex_sv;
- ST.prev_curlyx = cur_curlyx;
- SETREX(rex_sv,re_sv);
- rex = re;
- rexi = rei;
- cur_curlyx = NULL;
- ST.B = next;
- ST.prev_eval = cur_eval;
- cur_eval = st;
- /* now continue from first node in postoned RE */
- PUSH_YES_STATE_GOTO(EVAL_AB, startpoint);
- /* NOTREACHED */
- }
- /* logical is 1, /(?(?{...})X|Y)/ */
- sw = (bool)SvTRUE(ret);
- logical = 0;
- break;
- }
-
- case EVAL_AB: /* cleanup after a successful (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- regcpblow(ST.cp);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
- /* also update PL_regoffs */
- PL_regoffs = rex->offs;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayYES;
-
-
- case EVAL_AB_fail: /* unsuccessfully ran A or B in (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- PL_reginput = locinput;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayNO_SILENT;
-#undef ST
-
- case OPEN:
- n = ARG(scan); /* which paren pair */
- PL_reg_start_tmp[n] = locinput;
- if (n > PL_regsize)
- PL_regsize = n;
- lastopen = n;
- break;
- case CLOSE:
- n = ARG(scan); /* which paren pair */
- PL_regoffs[n].start = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if (cur_eval && cur_eval->u.eval.close_paren == n) {
- goto fake_end;
- }
- break;
- case ACCEPT:
- if (ARG(scan)){
- regnode *cursor;
- for (cursor=scan;
- cursor && OP(cursor)!=END;
- cursor=regnext(cursor))
- {
- if ( OP(cursor)==CLOSE ){
- n = ARG(cursor);
- if ( n <= lastopen ) {
- PL_regoffs[n].start
- = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if ( n == ARG(scan) || (cur_eval &&
- cur_eval->u.eval.close_paren == n))
- break;
- }
- }
- }
- }
- goto fake_end;
- /*NOTREACHED*/
- case GROUPP:
- n = ARG(scan); /* which paren pair */
- sw = (bool)(*PL_reglastparen >= n && PL_regoffs[n].end != -1);
- break;
- case NGROUPP:
- /* reg_check_named_buff_matched returns 0 for no match */
- sw = (bool)(0 < reg_check_named_buff_matched(rex,scan));
- break;
- case INSUBP:
- n = ARG(scan);
- sw = (cur_eval && (!n || cur_eval->u.eval.close_paren == n));
- break;
- case DEFINEP:
- sw = 0;
- break;
- case IFTHEN:
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (sw)
- next = NEXTOPER(NEXTOPER(scan));
- else {
- next = scan + ARG(scan);
- if (OP(next) == IFTHEN) /* Fake one. */
- next = NEXTOPER(NEXTOPER(next));
- }
- break;
- case LOGICAL:
- logical = scan->flags;
- break;
-
-/*******************************************************************
-
-The CURLYX/WHILEM pair of ops handle the most generic case of the /A*B/
-pattern, where A and B are subpatterns. (For simple A, CURLYM or
-STAR/PLUS/CURLY/CURLYN are used instead.)
-
-A*B is compiled as <CURLYX><A><WHILEM><B>
-
-On entry to the subpattern, CURLYX is called. This pushes a CURLYX
-state, which contains the current count, initialised to -1. It also sets
-cur_curlyx to point to this state, with any previous value saved in the
-state block.
-
-CURLYX then jumps straight to the WHILEM op, rather than executing A,
-since the pattern may possibly match zero times (i.e. it's a while {} loop
-rather than a do {} while loop).
-
-Each entry to WHILEM represents a successful match of A. The count in the
-CURLYX block is incremented, another WHILEM state is pushed, and execution
-passes to A or B depending on greediness and the current count.
-
-For example, if matching against the string a1a2a3b (where the aN are
-substrings that match /A/), then the match progresses as follows: (the
-pushed states are interspersed with the bits of strings matched so far):
-
- <CURLYX cnt=-1>
- <CURLYX cnt=0><WHILEM>
- <CURLYX cnt=1><WHILEM> a1 <WHILEM>
- <CURLYX cnt=2><WHILEM> a1 <WHILEM> a2 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> b
-
-(Contrast this with something like CURLYM, which maintains only a single
-backtrack state:
-
- <CURLYM cnt=0> a1
- a1 <CURLYM cnt=1> a2
- a1 a2 <CURLYM cnt=2> a3
- a1 a2 a3 <CURLYM cnt=3> b
-)
-
-Each WHILEM state block marks a point to backtrack to upon partial failure
-of A or B, and also contains some minor state data related to that
-iteration. The CURLYX block, pointed to by cur_curlyx, contains the
-overall state, such as the count, and pointers to the A and B ops.
-
-This is complicated slightly by nested CURLYX/WHILEM's. Since cur_curlyx
-must always point to the *current* CURLYX block, the rules are:
-
-When executing CURLYX, save the old cur_curlyx in the CURLYX state block,
-and set cur_curlyx to point the new block.
-
-When popping the CURLYX block after a successful or unsuccessful match,
-restore the previous cur_curlyx.
-
-When WHILEM is about to execute B, save the current cur_curlyx, and set it
-to the outer one saved in the CURLYX block.
-
-When popping the WHILEM block after a successful or unsuccessful B match,
-restore the previous cur_curlyx.
-
-Here's an example for the pattern (AI* BI)*BO
-I and O refer to inner and outer, C and W refer to CURLYX and WHILEM:
-
-cur_
-curlyx backtrack stack
------- ---------------
-NULL
-CO <CO prev=NULL> <WO>
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-NULL <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi <WO prev=CO> bo
-
-At this point the pattern succeeds, and we work back down the stack to
-clean up, restoring as we go:
-
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO>
-NULL
-
-*******************************************************************/
-
-#define ST st->u.curlyx
-
- case CURLYX: /* start of /A*B/ (for complex A) */
- {
- /* No need to save/restore up to this paren */
- I32 parenfloor = scan->flags;
-
- assert(next); /* keep Coverity happy */
- if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */
- next += ARG(next);
-
- /* XXXX Probably it is better to teach regpush to support
- parenfloor > PL_regsize... */
- if (parenfloor > (I32)*PL_reglastparen)
- parenfloor = *PL_reglastparen; /* Pessimization... */
-
- ST.prev_curlyx= cur_curlyx;
- cur_curlyx = st;
- ST.cp = PL_savestack_ix;
-
- /* these fields contain the state of the current curly.
- * they are accessed by subsequent WHILEMs */
- ST.parenfloor = parenfloor;
- ST.min = ARG1(scan);
- ST.max = ARG2(scan);
- ST.A = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- ST.B = next;
- ST.minmod = minmod;
- minmod = 0;
- ST.count = -1; /* this will be updated by WHILEM */
- ST.lastloc = NULL; /* this will be updated by WHILEM */
-
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYX_end, PREVOPER(next));
- /* NOTREACHED */
- }
-
- case CURLYX_end: /* just finished matching all of A*B */
- cur_curlyx = ST.prev_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case CURLYX_end_fail: /* just failed to match all of A*B */
- regcpblow(ST.cp);
- cur_curlyx = ST.prev_curlyx;
- sayNO;
- /* NOTREACHED */
-
-
-#undef ST
-#define ST st->u.whilem
-
- case WHILEM: /* just matched an A in /A*B/ (for complex A) */
- {
- /* see the discussion above about CURLYX/WHILEM */
- I32 n;
- assert(cur_curlyx); /* keep Coverity happy */
- n = ++cur_curlyx->u.curlyx.count; /* how many A's matched */
- ST.save_lastloc = cur_curlyx->u.curlyx.lastloc;
- ST.cache_offset = 0;
- ST.cache_mask = 0;
-
- PL_reginput = locinput;
-
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: matched %ld out of %ld..%ld\n",
- REPORT_CODE_OFF+depth*2, "", (long)n,
- (long)cur_curlyx->u.curlyx.min,
- (long)cur_curlyx->u.curlyx.max)
- );
-
- /* First just match a string of min A's. */
-
- if (n < cur_curlyx->u.curlyx.min) {
- cur_curlyx->u.curlyx.lastloc = locinput;
- PUSH_STATE_GOTO(WHILEM_A_pre, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
-
- /* If degenerate A matches "", assume A done. */
-
- if (locinput == cur_curlyx->u.curlyx.lastloc) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: empty match detected, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- goto do_whilem_B_max;
- }
-
- /* super-linear cache processing */
-
- if (scan->flags) {
-
- if (!PL_reg_maxiter) {
- /* start the countdown: Postpone detection until we
- * know the match is not *that* much linear. */
- PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4);
- /* possible overflow for long strings and many CURLYX's */
- if (PL_reg_maxiter < 0)
- PL_reg_maxiter = I32_MAX;
- PL_reg_leftiter = PL_reg_maxiter;
- }
-
- if (PL_reg_leftiter-- == 0) {
- /* initialise cache */
- const I32 size = (PL_reg_maxiter + 7)/8;
- if (PL_reg_poscache) {
- if ((I32)PL_reg_poscache_size < size) {
- Renew(PL_reg_poscache, size, char);
- PL_reg_poscache_size = size;
- }
- Zero(PL_reg_poscache, size, char);
- }
- else {
- PL_reg_poscache_size = size;
- Newxz(PL_reg_poscache, size, char);
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%swhilem: Detected a super-linear match, switching on caching%s...\n",
- PL_colors[4], PL_colors[5])
- );
- }
-
- if (PL_reg_leftiter < 0) {
- /* have we already failed at this position? */
- I32 offset, mask;
- offset = (scan->flags & 0xf) - 1
- + (locinput - PL_bostr) * (scan->flags>>4);
- mask = 1 << (offset % 8);
- offset /= 8;
- if (PL_reg_poscache[offset] & mask) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: (cache) already tried at this position...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- sayNO; /* cache records failure */
- }
- ST.cache_offset = offset;
- ST.cache_mask = mask;
- }
- }
-
- /* Prefer B over A for minimal matching. */
-
- if (cur_curlyx->u.curlyx.minmod) {
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- ST.cp = regcppush(ST.save_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_YES_STATE_GOTO(WHILEM_B_min, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
- }
-
- /* Prefer A over B for maximal matching. */
-
- if (n < cur_curlyx->u.curlyx.max) { /* More greed allowed? */
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- cur_curlyx->u.curlyx.lastloc = locinput;
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_max, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
- goto do_whilem_B_max;
- }
- /* NOTREACHED */
-
- case WHILEM_B_min: /* just matched B in a minimal match */
- case WHILEM_B_max: /* just matched B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case WHILEM_B_max_fail: /* just failed to match B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_min_fail: /* just failed to match A in a minimal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- /* FALL THROUGH */
- case WHILEM_A_pre_fail: /* just failed to match even minimal A */
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_max_fail: /* just failed to match A in a maximal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex); /* Restore some previous $<digit>s? */
- PL_reginput = locinput;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s whilem: failed, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- do_whilem_B_max:
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
-
- /* now try B */
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- PUSH_YES_STATE_GOTO(WHILEM_B_max, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
-
- case WHILEM_B_min_fail: /* just failed to match B in a minimal match */
- cur_curlyx = ST.save_curlyx;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
-
- if (cur_curlyx->u.curlyx.count >= cur_curlyx->u.curlyx.max) {
- /* Maximum greed exceeded */
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP),
- "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s trying longer...\n", REPORT_CODE_OFF+depth*2, "")
- );
- /* Try grabbing another A and see if it helps. */
- PL_reginput = locinput;
- cur_curlyx->u.curlyx.lastloc = locinput;
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_min, ST.save_curlyx->u.curlyx.A);
- /* NOTREACHED */
-
-#undef ST
-#define ST st->u.branch
-
- case BRANCHJ: /* /(...|A|...)/ with long next pointer */
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- scan = NEXTOPER(scan);
- /* FALL THROUGH */
-
- case BRANCH: /* /(...|A|...)/ */
- scan = NEXTOPER(scan); /* scan now points to inner node */
- ST.lastparen = *PL_reglastparen;
- ST.next_branch = next;
- REGCP_SET(ST.cp);
- PL_reginput = locinput;
-
- /* Now go into the branch */
- if (has_cutgroup) {
- PUSH_YES_STATE_GOTO(BRANCH_next, scan);
- } else {
- PUSH_STATE_GOTO(BRANCH_next, scan);
- }
- /* NOTREACHED */
- case CUTGROUP:
- PL_reginput = locinput;
- sv_yes_mark = st->u.mark.mark_name = scan->flags ? NULL :
- MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(CUTGROUP_next,next);
- /* NOTREACHED */
- case CUTGROUP_next_fail:
- do_cutgroup = 1;
- no_final = 1;
- if (st->u.mark.mark_name)
- sv_commit = st->u.mark.mark_name;
- sayNO;
- /* NOTREACHED */
- case BRANCH_next:
- sayYES;
- /* NOTREACHED */
- case BRANCH_next_fail: /* that branch failed; try the next, if any */
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- /*dmq: *PL_reglastcloseparen = n; */
- scan = ST.next_branch;
- /* no more branches? */
- if (!scan || (OP(scan) != BRANCH && OP(scan) != BRANCHJ)) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sBRANCH failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- sayNO_SILENT;
- }
- continue; /* execute next BRANCH[J] op */
- /* NOTREACHED */
-
- case MINMOD:
- minmod = 1;
- break;
-
-#undef ST
-#define ST st->u.curlym
-
- case CURLYM: /* /A{m,n}B/ where A is fixed-length */
-
- /* This is an optimisation of CURLYX that enables us to push
- * only a single backtracking state, no matter how many matches
- * there are in {m,n}. It relies on the pattern being constant
- * length, with no parens to influence future backrefs
- */
-
- ST.me = scan;
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
-
- /* if paren positive, emulate an OPEN/CLOSE around A */
- if (ST.me->flags) {
- U32 paren = ST.me->flags;
- if (paren > PL_regsize)
- PL_regsize = paren;
- if (paren > *PL_reglastparen)
- *PL_reglastparen = paren;
- scan += NEXT_OFF(scan); /* Skip former OPEN. */
- }
- ST.A = scan;
- ST.B = next;
- ST.alen = 0;
- ST.count = 0;
- ST.minmod = minmod;
- minmod = 0;
- ST.c1 = CHRTEST_UNINIT;
- REGCP_SET(ST.cp);
-
- if (!(ST.minmod ? ARG1(ST.me) : ARG2(ST.me))) /* min/max */
- goto curlym_do_B;
-
- curlym_do_A: /* execute the A in /A{m,n}B/ */
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYM_A, ST.A); /* match A */
- /* NOTREACHED */
-
- case CURLYM_A: /* we've just matched an A */
- locinput = st->locinput;
- nextchr = UCHARAT(locinput);
-
- ST.count++;
- /* after first match, determine A's length: u.curlym.alen */
- if (ST.count == 1) {
- if (PL_reg_match_utf8) {
- char *s = locinput;
- while (s < PL_reginput) {
- ST.alen++;
- s += UTF8SKIP(s);
- }
- }
- else {
- ST.alen = PL_reginput - locinput;
- }
- if (ST.alen == 0)
- ST.count = ST.minmod ? ARG1(ST.me) : ARG2(ST.me);
- }
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM now matched %"IVdf" times, len=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)), "",
- (IV) ST.count, (IV)ST.alen)
- );
-
- locinput = PL_reginput;
-
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- goto fake_end;
-
- {
- I32 max = (ST.minmod ? ARG1(ST.me) : ARG2(ST.me));
- if ( max == REG_INFTY || ST.count < max )
- goto curlym_do_A; /* try to match another A */
- }
- goto curlym_do_B; /* try to match B */
-
- case CURLYM_A_fail: /* just failed to match an A */
- REGCP_UNWIND(ST.cp);
-
- if (ST.minmod || ST.count < ARG1(ST.me) /* min*/
- || (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags))
- sayNO;
-
- curlym_do_B: /* execute the B in /A{m,n}B/ */
- PL_reginput = locinput;
- if (ST.c1 == CHRTEST_UNINIT) {
- /* calculate c1 and c2 for possible match of 1st char
- * following curly */
- ST.c1 = ST.c2 = CHRTEST_VOID;
- if (HAS_TEXT(ST.B) || JUMPABLE(ST.B)) {
- regnode *text_node = ST.B;
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
- /* this used to be
-
- (HAS_TEXT(text_node) && PL_regkind[OP(text_node)] == EXACT)
-
- But the former is redundant in light of the latter.
-
- if this changes back then the macro for
- IS_TEXT and friends need to change.
- */
- if (PL_regkind[OP(text_node)] == EXACT)
- {
-
- ST.c1 = (U8)*STRING(text_node);
- ST.c2 =
- (IS_TEXTF(text_node))
- ? PL_fold[ST.c1]
- : (IS_TEXTFL(text_node))
- ? PL_fold_locale[ST.c1]
- : ST.c1;
- }
- }
- }
-
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM trying tail with matches=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)),
- "", (IV)ST.count)
- );
- if (ST.c1 != CHRTEST_VOID
- && UCHARAT(PL_reginput) != ST.c1
- && UCHARAT(PL_reginput) != ST.c2)
- {
- /* simulate B failing */
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM Fast bail c1=%"IVdf" c2=%"IVdf"\n",
- (int)(REPORT_CODE_OFF+(depth*2)),"",
- (IV)ST.c1,(IV)ST.c2
- ));
- state_num = CURLYM_B_fail;
- goto reenter_switch;
- }
-
- if (ST.me->flags) {
- /* mark current A as captured */
- I32 paren = ST.me->flags;
- if (ST.count) {
- PL_regoffs[paren].start
- = HOPc(PL_reginput, -ST.alen) - PL_bostr;
- PL_regoffs[paren].end = PL_reginput - PL_bostr;
- /*dmq: *PL_reglastcloseparen = paren; */
- }
- else
- PL_regoffs[paren].end = -1;
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- {
- if (ST.count)
- goto fake_end;
- else
- sayNO;
- }
- }
-
- PUSH_STATE_GOTO(CURLYM_B, ST.B); /* match B */
- /* NOTREACHED */
-
- case CURLYM_B_fail: /* just failed to match a B */
- REGCP_UNWIND(ST.cp);
- if (ST.minmod) {
- I32 max = ARG2(ST.me);
- if (max != REG_INFTY && ST.count == max)
- sayNO;
- goto curlym_do_A; /* try to match a further A */
- }
- /* backtrack one A */
- if (ST.count == ARG1(ST.me) /* min */)
- sayNO;
- ST.count--;
- locinput = HOPc(locinput, -ST.alen);
- goto curlym_do_B; /* try to match B */
-
-#undef ST
-#define ST st->u.curly
-
-#define CURLY_SETPAREN(paren, success) \
- if (paren) { \
- if (success) { \
- PL_regoffs[paren].start = HOPc(locinput, -1) - PL_bostr; \
- PL_regoffs[paren].end = locinput - PL_bostr; \
- *PL_reglastcloseparen = paren; \
- } \
- else \
- PL_regoffs[paren].end = -1; \
- }
-
- case STAR: /* /A*B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 0;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case PLUS: /* /A+B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 1;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case CURLYN: /* /(A){m,n}B/ where A is width 1 */
- ST.paren = scan->flags; /* Which paren to set */
- if (ST.paren > PL_regsize)
- PL_regsize = ST.paren;
- if (ST.paren > *PL_reglastparen)
- *PL_reglastparen = ST.paren;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- ST.min=1;
- ST.max=1;
- }
- scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE);
- goto repeat;
- case CURLY: /* /A{m,n}B/ where A is width 1 */
- ST.paren = 0;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
- repeat:
- /*
- * Lookahead to avoid useless match attempts
- * when we know what character comes next.
- *
- * Used to only do .*x and .*?x, but now it allows
- * for )'s, ('s and (?{ ... })'s to be in the way
- * of the quantifier and the EXACT-like node. -- japhy
- */
-
- if (ST.min > ST.max) /* XXX make this a compile-time check? */
- sayNO;
- if (HAS_TEXT(next) || JUMPABLE(next)) {
- U8 *s;
- regnode *text_node = next;
-
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
-
- if (! HAS_TEXT(text_node))
- ST.c1 = ST.c2 = CHRTEST_VOID;
- else {
- if ( PL_regkind[OP(text_node)] != EXACT ) {
- ST.c1 = ST.c2 = CHRTEST_VOID;
- goto assume_ok_easy;
- }
- else
- s = (U8*)STRING(text_node);
-
- /* Currently we only get here when
-
- PL_rekind[OP(text_node)] == EXACT
-
- if this changes back then the macro for IS_TEXT and
- friends need to change. */
- if (!UTF) {
- ST.c2 = ST.c1 = *s;
- if (IS_TEXTF(text_node))
- ST.c2 = PL_fold[ST.c1];
- else if (IS_TEXTFL(text_node))
- ST.c2 = PL_fold_locale[ST.c1];
- }
- else { /* UTF */
- if (IS_TEXTF(text_node)) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- to_utf8_lower((U8*)s, tmpbuf1, &ulen1);
- to_utf8_upper((U8*)s, tmpbuf2, &ulen2);
-#ifdef EBCDIC
- ST.c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
- ST.c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
-#else
- ST.c1 = utf8n_to_uvuni(tmpbuf1, UTF8_MAXBYTES, 0,
- uniflags);
- ST.c2 = utf8n_to_uvuni(tmpbuf2, UTF8_MAXBYTES, 0,
- uniflags);
-#endif
- }
- else {
- ST.c2 = ST.c1 = utf8n_to_uvchr(s, UTF8_MAXBYTES, 0,
- uniflags);
- }
- }
- }
- }
- else
- ST.c1 = ST.c2 = CHRTEST_VOID;
- assume_ok_easy:
-
- ST.A = scan;
- ST.B = next;
- PL_reginput = locinput;
- if (minmod) {
- minmod = 0;
- if (ST.min && regrepeat(rex, ST.A, ST.min, depth) < ST.min)
- sayNO;
- ST.count = ST.min;
- locinput = PL_reginput;
- REGCP_SET(ST.cp);
- if (ST.c1 == CHRTEST_VOID)
- goto curly_try_B_min;
-
- ST.oldloc = locinput;
-
- /* set ST.maxpos to the furthest point along the
- * string that could possibly match */
- if (ST.max == REG_INFTY) {
- ST.maxpos = PL_regeol - 1;
- if (do_utf8)
- while (UTF8_IS_CONTINUATION(*(U8*)ST.maxpos))
- ST.maxpos--;
- }
- else if (do_utf8) {
- int m = ST.max - ST.min;
- for (ST.maxpos = locinput;
- m >0 && ST.maxpos + UTF8SKIP(ST.maxpos) <= PL_regeol; m--)
- ST.maxpos += UTF8SKIP(ST.maxpos);
- }
- else {
- ST.maxpos = locinput + ST.max - ST.min;
- if (ST.maxpos >= PL_regeol)
- ST.maxpos = PL_regeol - 1;
- }
- goto curly_try_B_min_known;
-
- }
- else {
- ST.count = regrepeat(rex, ST.A, ST.max, depth);
- locinput = PL_reginput;
- if (ST.count < ST.min)
- sayNO;
- if ((ST.count > ST.min)
- && (PL_regkind[OP(ST.B)] == EOL) && (OP(ST.B) != MEOL))
- {
- /* A{m,n} must come at the end of the string, there's
- * no point in backing off ... */
- ST.min = ST.count;
- /* ...except that $ and \Z can match before *and* after
- newline at the end. Consider "\n\n" =~ /\n+\Z\n/.
- We may back off by one in this case. */
- if (UCHARAT(PL_reginput - 1) == '\n' && OP(ST.B) != EOS)
- ST.min--;
- }
- REGCP_SET(ST.cp);
- goto curly_try_B_max;
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_known_fail:
- /* failed to find B in a non-greedy match where c1,c2 valid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- PL_reginput = locinput; /* Could be reset... */
- REGCP_UNWIND(ST.cp);
- /* Couldn't or didn't -- move forward. */
- ST.oldloc = locinput;
- if (do_utf8)
- locinput += UTF8SKIP(locinput);
- else
- locinput++;
- ST.count++;
- curly_try_B_min_known:
- /* find the next place where 'B' could work, then call B */
- {
- int n;
- if (do_utf8) {
- n = (ST.oldloc == locinput) ? 0 : 1;
- if (ST.c1 == ST.c2) {
- STRLEN len;
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos &&
- utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags) != (UV)ST.c1) {
- locinput += len;
- n++;
- }
- }
- else {
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos) {
- STRLEN len;
- const UV c = utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags);
- if (c == (UV)ST.c1 || c == (UV)ST.c2)
- break;
- locinput += len;
- n++;
- }
- }
- }
- else {
- if (ST.c1 == ST.c2) {
- while (locinput <= ST.maxpos &&
- UCHARAT(locinput) != ST.c1)
- locinput++;
- }
- else {
- while (locinput <= ST.maxpos
- && UCHARAT(locinput) != ST.c1
- && UCHARAT(locinput) != ST.c2)
- locinput++;
- }
- n = locinput - ST.oldloc;
- }
- if (locinput > ST.maxpos)
- sayNO;
- /* PL_reginput == oldloc now */
- if (n) {
- ST.count += n;
- if (regrepeat(rex, ST.A, n, depth) < n)
- sayNO;
- }
- PL_reginput = locinput;
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min_known, ST.B);
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_fail:
- /* failed to find B in a non-greedy match where c1,c2 invalid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* failed -- move forward one */
- PL_reginput = locinput;
- if (regrepeat(rex, ST.A, 1, depth)) {
- ST.count++;
- locinput = PL_reginput;
- if (ST.count <= ST.max || (ST.max == REG_INFTY &&
- ST.count > 0)) /* count overflow ? */
- {
- curly_try_B_min:
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min, ST.B);
- }
- }
- sayNO;
- /* NOTREACHED */
-
-
- curly_try_B_max:
- /* a successful greedy match: now try to match B */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- {
- UV c = 0;
- if (ST.c1 != CHRTEST_VOID)
- c = do_utf8 ? utf8n_to_uvchr((U8*)PL_reginput,
- UTF8_MAXBYTES, 0, uniflags)
- : (UV) UCHARAT(PL_reginput);
- /* If it could work, try it. */
- if (ST.c1 == CHRTEST_VOID || c == (UV)ST.c1 || c == (UV)ST.c2) {
- CURLY_SETPAREN(ST.paren, ST.count);
- PUSH_STATE_GOTO(CURLY_B_max, ST.B);
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case CURLY_B_max_fail:
- /* failed to find B in a greedy match */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* back up. */
- if (--ST.count < ST.min)
- sayNO;
- PL_reginput = locinput = HOPc(locinput, -1);
- goto curly_try_B_max;
-
-#undef ST
-
- case END:
- fake_end:
- if (cur_eval) {
- /* we've just finished A in /(??{A})B/; now continue with B */
- I32 tmpix;
- st->u.eval.toggle_reg_flags
- = cur_eval->u.eval.toggle_reg_flags;
- PL_reg_flags ^= st->u.eval.toggle_reg_flags;
-
- st->u.eval.prev_rex = rex_sv; /* inner */
- SETREX(rex_sv,cur_eval->u.eval.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- cur_curlyx = cur_eval->u.eval.prev_curlyx;
- ReREFCNT_inc(rex_sv);
- st->u.eval.cp = regcppush(0); /* Save *all* the positions. */
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- REGCP_SET(st->u.eval.lastcp);
- PL_reginput = locinput;
-
- /* Restore parens of the outer rex without popping the
- * savestack */
- tmpix = PL_savestack_ix;
- PL_savestack_ix = cur_eval->u.eval.lastcp;
- regcppop(rex);
- PL_savestack_ix = tmpix;
-
- st->u.eval.prev_eval = cur_eval;
- cur_eval = cur_eval->u.eval.prev_eval;
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log, "%*s EVAL trying tail ... %"UVxf"\n",
- REPORT_CODE_OFF+depth*2, "",PTR2UV(cur_eval)););
- if ( nochange_depth )
- nochange_depth--;
-
- PUSH_YES_STATE_GOTO(EVAL_AB,
- st->u.eval.prev_eval->u.eval.B); /* match B */
- }
-
- if (locinput < reginfo->till) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n",
- PL_colors[4],
- (long)(locinput - PL_reg_starttry),
- (long)(reginfo->till - PL_reg_starttry),
- PL_colors[5]));
-
- sayNO_SILENT; /* Cannot match: too short. */
- }
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
- case SUCCEED: /* successful SUSPEND/UNLESSM/IFMATCH/CURLYM */
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %ssubpattern success...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]));
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
-#undef ST
-#define ST st->u.ifmatch
-
- case SUSPEND: /* (?>A) */
- ST.wanted = 1;
- PL_reginput = locinput;
- goto do_ifmatch;
-
- case UNLESSM: /* -ve lookaround: (?!A), or with flags, (?<!A) */
- ST.wanted = 0;
- goto ifmatch_trivial_fail_test;
-
- case IFMATCH: /* +ve lookaround: (?=A), or with flags, (?<=A) */
- ST.wanted = 1;
- ifmatch_trivial_fail_test:
- if (scan->flags) {
- char * const s = HOPBACKc(locinput, scan->flags);
- if (!s) {
- /* trivial fail */
- if (logical) {
- logical = 0;
- sw = 1 - (bool)ST.wanted;
- }
- else if (ST.wanted)
- sayNO;
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- }
- PL_reginput = s;
- }
- else
- PL_reginput = locinput;
-
- do_ifmatch:
- ST.me = scan;
- ST.logical = logical;
- logical = 0; /* XXX: reset state of logical once it has been saved into ST */
-
- /* execute body of (?...A) */
- PUSH_YES_STATE_GOTO(IFMATCH_A, NEXTOPER(NEXTOPER(scan)));
- /* NOTREACHED */
-
- case IFMATCH_A_fail: /* body of (?...A) failed */
- ST.wanted = !ST.wanted;
- /* FALL THROUGH */
-
- case IFMATCH_A: /* body of (?...A) succeeded */
- if (ST.logical) {
- sw = (bool)ST.wanted;
- }
- else if (!ST.wanted)
- sayNO;
-
- if (OP(ST.me) == SUSPEND)
- locinput = PL_reginput;
- else {
- locinput = PL_reginput = st->locinput;
- nextchr = UCHARAT(locinput);
- }
- scan = ST.me + ARG(ST.me);
- if (scan == ST.me)
- scan = NULL;
- continue; /* execute B */
-
-#undef ST
-
- case LONGJMP:
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- case COMMIT:
- reginfo->cutpoint = PL_regeol;
- /* FALLTHROUGH */
- case PRUNE:
- PL_reginput = locinput;
- if (!scan->flags)
- sv_yes_mark = sv_commit = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(COMMIT_next,next);
- /* NOTREACHED */
- case COMMIT_next_fail:
- no_final = 1;
- /* FALLTHROUGH */
- case OPFAIL:
- sayNO;
- /* NOTREACHED */
-
-#define ST st->u.mark
- case MARKPOINT:
- ST.prev_mark = mark_state;
- ST.mark_name = sv_commit = sv_yes_mark
- = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- mark_state = st;
- ST.mark_loc = PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(MARKPOINT_next,next);
- /* NOTREACHED */
- case MARKPOINT_next:
- mark_state = ST.prev_mark;
- sayYES;
- /* NOTREACHED */
- case MARKPOINT_next_fail:
- if (popmark && sv_eq(ST.mark_name,popmark))
- {
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- popmark = NULL; /* we found our mark */
- sv_commit = ST.mark_name;
-
- DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,
- "%*s %ssetting cutpoint to mark:%"SVf"...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], SVfARG(sv_commit), PL_colors[5]);
- });
- }
- mark_state = ST.prev_mark;
- sv_yes_mark = mark_state ?
- mark_state->u.mark.mark_name : NULL;
- sayNO;
- /* NOTREACHED */
- case SKIP:
- PL_reginput = locinput;
- if (scan->flags) {
- /* (*SKIP) : if we fail we cut here*/
- ST.mark_name = NULL;
- ST.mark_loc = locinput;
- PUSH_STATE_GOTO(SKIP_next,next);
- } else {
- /* (*SKIP:NAME) : if there is a (*MARK:NAME) fail where it was,
- otherwise do nothing. Meaning we need to scan
- */
- regmatch_state *cur = mark_state;
- SV *find = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
-
- while (cur) {
- if ( sv_eq( cur->u.mark.mark_name,
- find ) )
- {
- ST.mark_name = find;
- PUSH_STATE_GOTO( SKIP_next, next );
- }
- cur = cur->u.mark.prev_mark;
- }
- }
- /* Didn't find our (*MARK:NAME) so ignore this (*SKIP:NAME) */
- break;
- case SKIP_next_fail:
- if (ST.mark_name) {
- /* (*CUT:NAME) - Set up to search for the name as we
- collapse the stack*/
- popmark = ST.mark_name;
- } else {
- /* (*CUT) - No name, we cut here.*/
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- /* but we set sv_commit to latest mark_name if there
- is one so they can test to see how things lead to this
- cut */
- if (mark_state)
- sv_commit=mark_state->u.mark.mark_name;
- }
- no_final = 1;
- sayNO;
- /* NOTREACHED */
-#undef ST
- case FOLDCHAR:
- n = ARG(scan);
- if ( n == (U32)what_len_TRICKYFOLD(locinput,do_utf8,ln) ) {
- locinput += ln;
- } else if ( 0xDF == n && !do_utf8 && !UTF ) {
- sayNO;
- } else {
- U8 folded[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const char * const l = locinput;
- char *e = PL_regeol;
- to_uni_fold(n, folded, &foldlen);
-
- if (ibcmp_utf8((const char*) folded, 0, foldlen, 1,
- l, &e, 0, do_utf8)) {
- sayNO;
- }
- locinput = e;
- }
- nextchr = UCHARAT(locinput);
- break;
- case LNBREAK:
- if ((n=is_LNBREAK(locinput,do_utf8))) {
- locinput += n;
- nextchr = UCHARAT(locinput);
- } else
- sayNO;
- break;
-
-#define CASE_CLASS(nAmE) \
- case nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- locinput += n; \
- nextchr = UCHARAT(locinput); \
- } else \
- sayNO; \
- break; \
- case N##nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- sayNO; \
- } else { \
- locinput += UTF8SKIP(locinput); \
- nextchr = UCHARAT(locinput); \
- } \
- break
-
- CASE_CLASS(VERTWS);
- CASE_CLASS(HORIZWS);
-#undef CASE_CLASS
-
- default:
- PerlIO_printf(Perl_error_log, "%"UVxf" %d\n",
- PTR2UV(scan), OP(scan));
- Perl_croak(aTHX_ "regexp memory corruption");
-
- } /* end switch */
-
- /* switch break jumps here */
- scan = next; /* prepare to execute the next op and ... */
- continue; /* ... jump back to the top, reusing st */
- /* NOTREACHED */
-
- push_yes_state:
- /* push a state that backtracks on success */
- st->u.yes.prev_yes_state = yes_state;
- yes_state = st;
- /* FALL THROUGH */
- push_state:
- /* push a new regex state, then continue at scan */
- {
- regmatch_state *newst;
-
- DEBUG_STACK_r({
- regmatch_state *cur = st;
- regmatch_state *curyes = yes_state;
- int curd = depth;
- regmatch_slab *slab = PL_regmatch_slab;
- for (;curd > -1;cur--,curd--) {
- if (cur < SLAB_FIRST(slab)) {
- slab = slab->prev;
- cur = SLAB_LAST(slab);
- }
- PerlIO_printf(Perl_error_log, "%*s#%-3d %-10s %s\n",
- REPORT_CODE_OFF + 2 + depth * 2,"",
- curd, PL_reg_name[cur->resume_state],
- (curyes == cur) ? "yes" : ""
- );
- if (curyes == cur)
- curyes = cur->u.yes.prev_yes_state;
- }
- } else
- DEBUG_STATE_pp("push")
- );
- depth++;
- st->locinput = locinput;
- newst = st+1;
- if (newst > SLAB_LAST(PL_regmatch_slab))
- newst = S_push_slab(aTHX);
- PL_regmatch_state = newst;
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- st = newst;
- continue;
- /* NOTREACHED */
- }
- }
-
- /*
- * We get here only if there's trouble -- normally "case END" is
- * the terminating point.
- */
- Perl_croak(aTHX_ "corrupted regexp pointers");
- /*NOTREACHED*/
- sayNO;
-
-yes:
- if (yes_state) {
- /* we have successfully completed a subexpression, but we must now
- * pop to the state marked by yes_state and continue from there */
- assert(st != yes_state);
-#ifdef DEBUGGING
- while (st != yes_state) {
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- DEBUG_STATE_r({
- if (no_final) {
- DEBUG_STATE_pp("pop (no final)");
- } else {
- DEBUG_STATE_pp("pop (yes)");
- }
- });
- depth--;
- }
-#else
- while (yes_state < SLAB_FIRST(PL_regmatch_slab)
- || yes_state > SLAB_LAST(PL_regmatch_slab))
- {
- /* not in this slab, pop slab */
- depth -= (st - SLAB_FIRST(PL_regmatch_slab) + 1);
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- depth -= (st - yes_state);
-#endif
- st = yes_state;
- yes_state = st->u.yes.prev_yes_state;
- PL_regmatch_state = st;
-
- if (no_final) {
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
- }
- state_num = st->resume_state + no_final;
- goto reenter_switch;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n",
- PL_colors[4], PL_colors[5]));
-
- if (PL_reg_eval_set) {
- /* each successfully executed (?{...}) block does the equivalent of
- * local $^R = do {...}
- * When popping the save stack, all these locals would be undone;
- * bypass this by setting the outermost saved $^R to the latest
- * value */
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- }
- result = 1;
- goto final_exit;
-
-no:
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], PL_colors[5])
- );
-
-no_silent:
- if (no_final) {
- if (yes_state) {
- goto yes;
- } else {
- goto final_exit;
- }
- }
- if (depth) {
- /* there's a previous state to backtrack to */
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- PL_regmatch_state = st;
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
-
- DEBUG_STATE_pp("pop");
- depth--;
- if (yes_state == st)
- yes_state = st->u.yes.prev_yes_state;
-
- state_num = st->resume_state + 1; /* failure = success + 1 */
- goto reenter_switch;
- }
- result = 0;
-
- final_exit:
- if (rex->intflags & PREGf_VERBARG_SEEN) {
- SV *sv_err = get_sv("REGERROR", 1);
- SV *sv_mrk = get_sv("REGMARK", 1);
- if (result) {
- sv_commit = &PL_sv_no;
- if (!sv_yes_mark)
- sv_yes_mark = &PL_sv_yes;
- } else {
- if (!sv_commit)
- sv_commit = &PL_sv_yes;
- sv_yes_mark = &PL_sv_no;
- }
- sv_setsv(sv_err, sv_commit);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- /* clean up; in particular, free all slabs above current one */
- LEAVE_SCOPE(oldsave);
-
- return result;
-}
-
-/*
- - regrepeat - repeatedly match something simple, report how many
- */
-/*
- * [This routine now assumes that it will only match on things of length 1.
- * That was true before, but now we assume scan - reginput is the count,
- * rather than incrementing count on every character. [Er, except utf8.]]
- */
-STATIC I32
-S_regrepeat(pTHX_ const regexp *prog, const regnode *p, I32 max, int depth)
-{
- dVAR;
- register char *scan;
- register I32 c;
- register char *loceol = PL_regeol;
- register I32 hardcount = 0;
- register bool do_utf8 = PL_reg_match_utf8;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_REGREPEAT;
-
- scan = PL_reginput;
- if (max == REG_INFTY)
- max = I32_MAX;
- else if (max < loceol - scan)
- loceol = scan + max;
- switch (OP(p)) {
- case REG_ANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max && *scan != '\n') {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && *scan != '\n')
- scan++;
- }
- break;
- case SANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- }
- else
- scan = loceol;
- break;
- case CANY:
- scan = loceol;
- break;
- case EXACT: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol && UCHARAT(scan) == c)
- scan++;
- break;
- case EXACTF: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c]))
- scan++;
- break;
- case EXACTFL: /* length of string is 1 */
- PL_reg_flags |= RF_tainted;
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c]))
- scan++;
- break;
- case ANYOF:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- reginclass(prog, p, (U8*)scan, 0, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && REGINCLASS(prog, p, (U8*)scan))
- scan++;
- }
- break;
- case ALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM(*scan))
- scan++;
- }
- break;
- case ALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM_LC(*scan))
- scan++;
- }
- break;
- case NALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM(*scan))
- scan++;
- }
- break;
- case NALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM_LC(*scan))
- scan++;
- }
- break;
- case SPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE(*scan))
- scan++;
- }
- break;
- case SPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE_LC(*scan))
- scan++;
- }
- break;
- case NSPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE(*scan))
- scan++;
- }
- break;
- case NSPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE_LC(*scan))
- scan++;
- }
- break;
- case DIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isDIGIT(*scan))
- scan++;
- }
- break;
- case NDIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isDIGIT(*scan))
- scan++;
- }
- case LNBREAK:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_LNBREAK_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- /*
- LNBREAK can match two latin chars, which is ok,
- because we have a null terminated string, but we
- have to use hardcount in this situation
- */
- while (scan < loceol && (c=is_LNBREAK_latin1(scan))) {
- scan+=c;
- hardcount++;
- }
- }
- break;
- case HORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_HORIZWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_HORIZWS_latin1(scan))
- scan++;
- }
- break;
- case NHORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_HORIZWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_HORIZWS_latin1(scan))
- scan++;
-
- }
- break;
- case VERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_VERTWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
- case NVERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_VERTWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
-
- default: /* Called on something of 0 width. */
- break; /* So match right here or not at all. */
- }
-
- if (hardcount)
- c = hardcount;
- else
- c = scan - PL_reginput;
- PL_reginput = scan;
-
- DEBUG_r({
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, p);
- PerlIO_printf(Perl_debug_log,
- "%*s %s can match %"IVdf" times out of %"IVdf"...\n",
- REPORT_CODE_OFF + depth*2, "", SvPVX_const(prop),(IV)c,(IV)max);
- });
- });
-
- return(c);
-}
-
-
-#if !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION)
-/*
-- regclass_swash - prepare the utf8 swash
-*/
-
-SV *
-Perl_regclass_swash(pTHX_ const regexp *prog, register const regnode* node, bool doinit, SV** listsvp, SV **altsvp)
-{
- dVAR;
- SV *sw = NULL;
- SV *si = NULL;
- SV *alt = NULL;
- RXi_GET_DECL(prog,progi);
- const struct reg_data * const data = prog ? progi->data : NULL;
-
- PERL_ARGS_ASSERT_REGCLASS_SWASH;
-
- if (data && data->count) {
- const U32 n = ARG(node);
-
- if (data->what[n] == 's') {
- SV * const rv = MUTABLE_SV(data->data[n]);
- AV * const av = MUTABLE_AV(SvRV(rv));
- SV **const ary = AvARRAY(av);
- SV **a, **b;
-
- /* See the end of regcomp.c:S_regclass() for
- * documentation of these array elements. */
-
- si = *ary;
- a = SvROK(ary[1]) ? &ary[1] : NULL;
- b = SvTYPE(ary[2]) == SVt_PVAV ? &ary[2] : NULL;
-
- if (a)
- sw = *a;
- else if (si && doinit) {
- sw = swash_init("utf8", "", si, 1, 0);
- (void)av_store(av, 1, sw);
- }
- if (b)
- alt = *b;
- }
- }
-
- if (listsvp)
- *listsvp = si;
- if (altsvp)
- *altsvp = alt;
-
- return sw;
-}
-#endif
-
-/*
- - reginclass - determine if a character falls into a character class
-
- The n is the ANYOF regnode, the p is the target string, lenp
- is pointer to the maximum length of how far to go in the p
- (if the lenp is zero, UTF8SKIP(p) is used),
- do_utf8 tells whether the target string is in UTF-8.
-
- */
-
-STATIC bool
-S_reginclass(pTHX_ const regexp *prog, register const regnode *n, register const U8* p, STRLEN* lenp, register bool do_utf8)
-{
- dVAR;
- const char flags = ANYOF_FLAGS(n);
- bool match = FALSE;
- UV c = *p;
- STRLEN len = 0;
- STRLEN plen;
-
- PERL_ARGS_ASSERT_REGINCLASS;
-
- if (do_utf8 && !UTF8_IS_INVARIANT(c)) {
- c = utf8n_to_uvchr(p, UTF8_MAXBYTES, &len,
- (UTF8_ALLOW_DEFAULT & UTF8_ALLOW_ANYUV)
- | UTF8_ALLOW_FFFF | UTF8_CHECK_ONLY);
- /* see [perl #37836] for UTF8_ALLOW_ANYUV; [perl #38293] for
- * UTF8_ALLOW_FFFF */
- if (len == (STRLEN)-1)
- Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)");
- }
-
- plen = lenp ? *lenp : UNISKIP(NATIVE_TO_UNI(c));
- if (do_utf8 || (flags & ANYOF_UNICODE)) {
- if (lenp)
- *lenp = 0;
- if (do_utf8 && !ANYOF_RUNTIME(n)) {
- if (len != (STRLEN)-1 && c < 256 && ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- }
- if (!match && do_utf8 && (flags & ANYOF_UNICODE_ALL) && c >= 256)
- match = TRUE;
- if (!match) {
- AV *av;
- SV * const sw = regclass_swash(prog, n, TRUE, 0, (SV**)&av);
-
- if (sw) {
- U8 * utf8_p;
- if (do_utf8) {
- utf8_p = (U8 *) p;
- } else {
- STRLEN len = 1;
- utf8_p = bytes_to_utf8(p, &len);
- }
- if (swash_fetch(sw, utf8_p, 1))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- if (!match && lenp && av) {
- I32 i;
- for (i = 0; i <= av_len(av); i++) {
- SV* const sv = *av_fetch(av, i, FALSE);
- STRLEN len;
- const char * const s = SvPV_const(sv, len);
- if (len <= plen && memEQ(s, (char*)utf8_p, len)) {
- *lenp = len;
- match = TRUE;
- break;
- }
- }
- }
- if (!match) {
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1];
-
- STRLEN tmplen;
- to_utf8_fold(utf8_p, tmpbuf, &tmplen);
- if (swash_fetch(sw, tmpbuf, 1))
- match = TRUE;
- }
- }
-
- /* If we allocated a string above, free it */
- if (! do_utf8) Safefree(utf8_p);
- }
- }
- if (match && lenp && *lenp == 0)
- *lenp = UNISKIP(NATIVE_TO_UNI(c));
- }
- if (!match && c < 256) {
- if (ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- U8 f;
-
- if (flags & ANYOF_LOCALE) {
- PL_reg_flags |= RF_tainted;
- f = PL_fold_locale[c];
- }
- else
- f = PL_fold[c];
- if (f != c && ANYOF_BITMAP_TEST(n, f))
- match = TRUE;
- }
-
- if (!match && (flags & ANYOF_CLASS)) {
- PL_reg_flags |= RF_tainted;
- if (
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK(c))
- ) /* How's that for a conditional? */
- {
- match = TRUE;
- }
- }
- }
-
- return (flags & ANYOF_INVERT) ? !match : match;
-}
-
-STATIC U8 *
-S_reghop3(U8 *s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-
-#ifdef XXX_dmq
-/* there are a bunch of places where we use two reghop3's that should
- be replaced with this routine. but since thats not done yet
- we ifdef it out - dmq
-*/
-STATIC U8 *
-S_reghop4(U8 *s, I32 off, const U8* llim, const U8* rlim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP4;
-
- if (off >= 0) {
- while (off-- && s < rlim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > llim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > llim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-#endif
-
-STATIC U8 *
-S_reghopmaybe3(U8* s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOPMAYBE3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- if (off >= 0)
- return NULL;
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- if (off <= 0)
- return NULL;
- }
- return s;
-}
-
-static void
-restore_pos(pTHX_ void *arg)
-{
- dVAR;
- regexp * const rex = (regexp *)arg;
- if (PL_reg_eval_set) {
- if (PL_reg_oldsaved) {
- rex->subbeg = PL_reg_oldsaved;
- rex->sublen = PL_reg_oldsavedlen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- rex->saved_copy = PL_nrs;
-#endif
- RXp_MATCH_COPIED_on(rex);
- }
- PL_reg_magic->mg_len = PL_reg_oldpos;
- PL_reg_eval_set = 0;
- PL_curpm = PL_reg_oldcurpm;
- }
-}
-
-STATIC void
-S_to_utf8_substr(pTHX_ register regexp *prog)
-{
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_UTF8_SUBSTR;
-
- do {
- if (prog->substrs->data[i].substr
- && !prog->substrs->data[i].utf8_substr) {
- SV* const sv = newSVsv(prog->substrs->data[i].substr);
- prog->substrs->data[i].utf8_substr = sv;
- sv_utf8_upgrade(sv);
- if (SvVALID(prog->substrs->data[i].substr)) {
- const U8 flags = BmFLAGS(prog->substrs->data[i].substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- /* Whilst this makes the SV technically "invalid" (as its
- buffer is no longer followed by "\0") when fbm_compile()
- adds the "\n" back, a "\0" is restored. */
- }
- fbm_compile(sv, flags);
- }
- if (prog->substrs->data[i].substr == prog->check_substr)
- prog->check_utf8 = sv;
- }
- } while (i--);
-}
-
-STATIC void
-S_to_byte_substr(pTHX_ register regexp *prog)
-{
- dVAR;
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_BYTE_SUBSTR;
-
- do {
- if (prog->substrs->data[i].utf8_substr
- && !prog->substrs->data[i].substr) {
- SV* sv = newSVsv(prog->substrs->data[i].utf8_substr);
- if (sv_utf8_downgrade(sv, TRUE)) {
- if (SvVALID(prog->substrs->data[i].utf8_substr)) {
- const U8 flags
- = BmFLAGS(prog->substrs->data[i].utf8_substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- }
- fbm_compile(sv, flags);
- }
- } else {
- SvREFCNT_dec(sv);
- sv = &PL_sv_undef;
- }
- prog->substrs->data[i].substr = sv;
- if (prog->substrs->data[i].utf8_substr == prog->check_utf8)
- prog->check_substr = sv;
- }
- } while (i--);
-}
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regcomp.c
- */
-
-/*
- * 'A fair jaw-cracker dwarf-language must be.' --Samwise Gamgee
- *
- * [p.285 of _The Lord of the Rings_, II/iii: "The Ring Goes South"]
- */
-
-/* This file contains functions for compiling a regular expression. See
- * also regexec.c which funnily enough, contains functions for executing
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_comp.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
-
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGCOMP_C
-#include "perl.h"
-
-#ifndef PERL_IN_XSUB_RE
-# include "INTERN.h"
-#endif
-
-#define REG_COMP_C
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#ifdef op
-#undef op
-#endif /* op */
-
-#ifdef MSDOS
-# if defined(BUGGY_MSC6)
- /* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */
-# pragma optimize("a",off)
- /* But MSC 6.00A is happy with 'w', for aliases only across function calls*/
-# pragma optimize("w",on )
-# endif /* BUGGY_MSC6 */
-#endif /* MSDOS */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-typedef struct RExC_state_t {
- U32 flags; /* are we folding, multilining? */
- char *precomp; /* uncompiled string. */
- REGEXP *rx_sv; /* The SV that is the regexp. */
- regexp *rx; /* perl core regexp structure */
- regexp_internal *rxi; /* internal data for regexp object pprivate field */
- char *start; /* Start of input for compile */
- char *end; /* End of input for compile */
- char *parse; /* Input-scan pointer. */
- I32 whilem_seen; /* number of WHILEM in this expr */
- regnode *emit_start; /* Start of emitted-code area */
- regnode *emit_bound; /* First regnode outside of the allocated space */
- regnode *emit; /* Code-emit pointer; ®dummy = don't = compiling */
- I32 naughty; /* How bad is this pattern? */
- I32 sawback; /* Did we see \1, ...? */
- U32 seen;
- I32 size; /* Code size. */
- I32 npar; /* Capture buffer count, (OPEN). */
- I32 cpar; /* Capture buffer count, (CLOSE). */
- I32 nestroot; /* root parens we are in - used by accept */
- I32 extralen;
- I32 seen_zerolen;
- I32 seen_evals;
- regnode **open_parens; /* pointers to open parens */
- regnode **close_parens; /* pointers to close parens */
- regnode *opend; /* END node in program */
- I32 utf8; /* whether the pattern is utf8 or not */
- I32 orig_utf8; /* whether the pattern was originally in utf8 */
- /* XXX use this for future optimisation of case
- * where pattern must be upgraded to utf8. */
- HV *charnames; /* cache of named sequences */
- HV *paren_names; /* Paren names */
-
- regnode **recurse; /* Recurse regops */
- I32 recurse_count; /* Number of recurse regops */
-#if ADD_TO_REGEXEC
- char *starttry; /* -Dr: where regtry was called. */
-#define RExC_starttry (pRExC_state->starttry)
-#endif
-#ifdef DEBUGGING
- const char *lastparse;
- I32 lastnum;
- AV *paren_name_list; /* idx -> name */
-#define RExC_lastparse (pRExC_state->lastparse)
-#define RExC_lastnum (pRExC_state->lastnum)
-#define RExC_paren_name_list (pRExC_state->paren_name_list)
-#endif
-} RExC_state_t;
-
-#define RExC_flags (pRExC_state->flags)
-#define RExC_precomp (pRExC_state->precomp)
-#define RExC_rx_sv (pRExC_state->rx_sv)
-#define RExC_rx (pRExC_state->rx)
-#define RExC_rxi (pRExC_state->rxi)
-#define RExC_start (pRExC_state->start)
-#define RExC_end (pRExC_state->end)
-#define RExC_parse (pRExC_state->parse)
-#define RExC_whilem_seen (pRExC_state->whilem_seen)
-#ifdef RE_TRACK_PATTERN_OFFSETS
-#define RExC_offsets (pRExC_state->rxi->u.offsets) /* I am not like the others */
-#endif
-#define RExC_emit (pRExC_state->emit)
-#define RExC_emit_start (pRExC_state->emit_start)
-#define RExC_emit_bound (pRExC_state->emit_bound)
-#define RExC_naughty (pRExC_state->naughty)
-#define RExC_sawback (pRExC_state->sawback)
-#define RExC_seen (pRExC_state->seen)
-#define RExC_size (pRExC_state->size)
-#define RExC_npar (pRExC_state->npar)
-#define RExC_nestroot (pRExC_state->nestroot)
-#define RExC_extralen (pRExC_state->extralen)
-#define RExC_seen_zerolen (pRExC_state->seen_zerolen)
-#define RExC_seen_evals (pRExC_state->seen_evals)
-#define RExC_utf8 (pRExC_state->utf8)
-#define RExC_orig_utf8 (pRExC_state->orig_utf8)
-#define RExC_charnames (pRExC_state->charnames)
-#define RExC_open_parens (pRExC_state->open_parens)
-#define RExC_close_parens (pRExC_state->close_parens)
-#define RExC_opend (pRExC_state->opend)
-#define RExC_paren_names (pRExC_state->paren_names)
-#define RExC_recurse (pRExC_state->recurse)
-#define RExC_recurse_count (pRExC_state->recurse_count)
-
-
-#define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?')
-#define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \
- ((*s) == '{' && regcurly(s)))
-
-#ifdef SPSTART
-#undef SPSTART /* dratted cpp namespace... */
-#endif
-/*
- * Flags to be passed up and down.
- */
-#define WORST 0 /* Worst case. */
-#define HASWIDTH 0x01 /* Known to match non-null strings. */
-#define SIMPLE 0x02 /* Simple enough to be STAR/PLUS operand. */
-#define SPSTART 0x04 /* Starts with * or +. */
-#define TRYAGAIN 0x08 /* Weeded out a declaration. */
-#define POSTPONED 0x10 /* (?1),(?&name), (??{...}) or similar */
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-RExC_emit_start) : -1)
-
-/* whether trie related optimizations are enabled */
-#if PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION
-#define TRIE_STUDY_OPT
-#define FULL_TRIE_STUDY
-#define TRIE_STCLASS
-#endif
-
-
-
-#define PBYTE(u8str,paren) ((U8*)(u8str))[(paren) >> 3]
-#define PBITVAL(paren) (1 << ((paren) & 7))
-#define PAREN_TEST(u8str,paren) ( PBYTE(u8str,paren) & PBITVAL(paren))
-#define PAREN_SET(u8str,paren) PBYTE(u8str,paren) |= PBITVAL(paren)
-#define PAREN_UNSET(u8str,paren) PBYTE(u8str,paren) &= (~PBITVAL(paren))
-
-
-/* About scan_data_t.
-
- During optimisation we recurse through the regexp program performing
- various inplace (keyhole style) optimisations. In addition study_chunk
- and scan_commit populate this data structure with information about
- what strings MUST appear in the pattern. We look for the longest
- string that must appear for at a fixed location, and we look for the
- longest string that may appear at a floating location. So for instance
- in the pattern:
-
- /FOO[xX]A.*B[xX]BAR/
-
- Both 'FOO' and 'A' are fixed strings. Both 'B' and 'BAR' are floating
- strings (because they follow a .* construct). study_chunk will identify
- both FOO and BAR as being the longest fixed and floating strings respectively.
-
- The strings can be composites, for instance
-
- /(f)(o)(o)/
-
- will result in a composite fixed substring 'foo'.
-
- For each string some basic information is maintained:
-
- - offset or min_offset
- This is the position the string must appear at, or not before.
- It also implicitly (when combined with minlenp) tells us how many
- character must match before the string we are searching.
- Likewise when combined with minlenp and the length of the string
- tells us how many characters must appear after the string we have
- found.
-
- - max_offset
- Only used for floating strings. This is the rightmost point that
- the string can appear at. Ifset to I32 max it indicates that the
- string can occur infinitely far to the right.
-
- - minlenp
- A pointer to the minimum length of the pattern that the string
- was found inside. This is important as in the case of positive
- lookahead or positive lookbehind we can have multiple patterns
- involved. Consider
-
- /(?=FOO).*F/
-
- The minimum length of the pattern overall is 3, the minimum length
- of the lookahead part is 3, but the minimum length of the part that
- will actually match is 1. So 'FOO's minimum length is 3, but the
- minimum length for the F is 1. This is important as the minimum length
- is used to determine offsets in front of and behind the string being
- looked for. Since strings can be composites this is the length of the
- pattern at the time it was commited with a scan_commit. Note that
- the length is calculated by study_chunk, so that the minimum lengths
- are not known until the full pattern has been compiled, thus the
- pointer to the value.
-
- - lookbehind
-
- In the case of lookbehind the string being searched for can be
- offset past the start point of the final matching string.
- If this value was just blithely removed from the min_offset it would
- invalidate some of the calculations for how many chars must match
- before or after (as they are derived from min_offset and minlen and
- the length of the string being searched for).
- When the final pattern is compiled and the data is moved from the
- scan_data_t structure into the regexp structure the information
- about lookbehind is factored in, with the information that would
- have been lost precalculated in the end_shift field for the
- associated string.
-
- The fields pos_min and pos_delta are used to store the minimum offset
- and the delta to the maximum offset at the current point in the pattern.
-
-*/
-
-typedef struct scan_data_t {
- /*I32 len_min; unused */
- /*I32 len_delta; unused */
- I32 pos_min;
- I32 pos_delta;
- SV *last_found;
- I32 last_end; /* min value, <0 unless valid. */
- I32 last_start_min;
- I32 last_start_max;
- SV **longest; /* Either &l_fixed, or &l_float. */
- SV *longest_fixed; /* longest fixed string found in pattern */
- I32 offset_fixed; /* offset where it starts */
- I32 *minlen_fixed; /* pointer to the minlen relevent to the string */
- I32 lookbehind_fixed; /* is the position of the string modfied by LB */
- SV *longest_float; /* longest floating string found in pattern */
- I32 offset_float_min; /* earliest point in string it can appear */
- I32 offset_float_max; /* latest point in string it can appear */
- I32 *minlen_float; /* pointer to the minlen relevent to the string */
- I32 lookbehind_float; /* is the position of the string modified by LB */
- I32 flags;
- I32 whilem_c;
- I32 *last_closep;
- struct regnode_charclass_class *start_class;
-} scan_data_t;
-
-/*
- * Forward declarations for pregcomp()'s friends.
- */
-
-static const scan_data_t zero_scan_data =
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0};
-
-#define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL)
-#define SF_BEFORE_SEOL 0x0001
-#define SF_BEFORE_MEOL 0x0002
-#define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL)
-#define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL)
-
-#ifdef NO_UNARY_PLUS
-# define SF_FIX_SHIFT_EOL (0+2)
-# define SF_FL_SHIFT_EOL (0+4)
-#else
-# define SF_FIX_SHIFT_EOL (+2)
-# define SF_FL_SHIFT_EOL (+4)
-#endif
-
-#define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL)
-#define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL)
-
-#define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL)
-#define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */
-#define SF_IS_INF 0x0040
-#define SF_HAS_PAR 0x0080
-#define SF_IN_PAR 0x0100
-#define SF_HAS_EVAL 0x0200
-#define SCF_DO_SUBSTR 0x0400
-#define SCF_DO_STCLASS_AND 0x0800
-#define SCF_DO_STCLASS_OR 0x1000
-#define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR)
-#define SCF_WHILEM_VISITED_POS 0x2000
-
-#define SCF_TRIE_RESTUDY 0x4000 /* Do restudy? */
-#define SCF_SEEN_ACCEPT 0x8000
-
-#define UTF (RExC_utf8 != 0)
-#define LOC ((RExC_flags & RXf_PMf_LOCALE) != 0)
-#define FOLD ((RExC_flags & RXf_PMf_FOLD) != 0)
-
-#define OOB_UNICODE 12345678
-#define OOB_NAMEDCLASS -1
-
-#define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b)
-
-
-/* length of regex to show in messages that don't mark a position within */
-#define RegexLengthToShowInErrorMessages 127
-
-/*
- * If MARKER[12] are adjusted, be sure to adjust the constants at the top
- * of t/op/regmesg.t, the tests in t/op/re_tests, and those in
- * op/pragma/warn/regcomp.
- */
-#define MARKER1 "<-- HERE" /* marker as it appears in the description */
-#define MARKER2 " <-- HERE " /* marker as it appears within the regex */
-
-#define REPORT_LOCATION " in regex; marked by " MARKER1 " in m/%.*s" MARKER2 "%s/"
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given
- * arg. Show regex, up to a maximum length. If it's too long, chop and add
- * "...".
- */
-#define _FAIL(code) STMT_START { \
- const char *ellipses = ""; \
- IV len = RExC_end - RExC_precomp; \
- \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- if (len > RegexLengthToShowInErrorMessages) { \
- /* chop 10 shorter than the max, to ensure meaning of "..." */ \
- len = RegexLengthToShowInErrorMessages - 10; \
- ellipses = "..."; \
- } \
- code; \
-} STMT_END
-
-#define FAIL(msg) _FAIL( \
- Perl_croak(aTHX_ "%s in regex m/%.*s%s/", \
- msg, (int)len, RExC_precomp, ellipses))
-
-#define FAIL2(msg,arg) _FAIL( \
- Perl_croak(aTHX_ msg " in regex m/%.*s%s/", \
- arg, (int)len, RExC_precomp, ellipses))
-
-/*
- * Simple_vFAIL -- like FAIL, but marks the current location in the scan
- */
-#define Simple_vFAIL(m) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- Perl_croak(aTHX_ "%s" REPORT_LOCATION, \
- m, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL()
- */
-#define vFAIL(m) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL(m); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts two arguments.
- */
-#define Simple_vFAIL2(m,a1) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2().
- */
-#define vFAIL2(m,a1) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL2(m, a1); \
-} STMT_END
-
-
-/*
- * Like Simple_vFAIL(), but accepts three arguments.
- */
-#define Simple_vFAIL3(m, a1, a2) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3().
- */
-#define vFAIL3(m,a1,a2) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL3(m, a1, a2); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts four arguments.
- */
-#define Simple_vFAIL4(m, a1, a2, a3) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNreg(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNregdep(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_REGEXP), \
- m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN2reg(loc, m, a1) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN3(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN3reg(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN4(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN4reg(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN5(loc, m, a1, a2, a3, a4) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, a4, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-
-/* Allow for side effects in s */
-#define REGC(c,s) STMT_START { \
- if (!SIZE_ONLY) *(s) = (c); else (void)(s); \
-} STMT_END
-
-/* Macros for recording node offsets. 20001227 mjd@plover.com
- * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in
- * element 2*n-1 of the array. Element #2n holds the byte length node #n.
- * Element 0 holds the number n.
- * Position is 1 indexed.
- */
-#ifndef RE_TRACK_PATTERN_OFFSETS
-#define Set_Node_Offset_To_R(node,byte)
-#define Set_Node_Offset(node,byte)
-#define Set_Cur_Node_Offset
-#define Set_Node_Length_To_R(node,len)
-#define Set_Node_Length(node,len)
-#define Set_Node_Cur_Length(node)
-#define Node_Offset(n)
-#define Node_Length(n)
-#define Set_Node_Offset_Length(node,offset,len)
-#define ProgLen(ri) ri->u.proglen
-#define SetProgLen(ri,x) ri->u.proglen = x
-#else
-#define ProgLen(ri) ri->u.offsets[0]
-#define SetProgLen(ri,x) ri->u.offsets[0] = x
-#define Set_Node_Offset_To_R(node,byte) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) offset of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(byte))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Offset macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)-1] = (byte); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Offset(node,byte) \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start)
-#define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse)
-
-#define Set_Node_Length_To_R(node,len) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) size of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(len))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Length macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)] = (len); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Length(node,len) \
- Set_Node_Length_To_R((node)-RExC_emit_start, len)
-#define Set_Cur_Node_Length(len) Set_Node_Length(RExC_emit, len)
-#define Set_Node_Cur_Length(node) \
- Set_Node_Length(node, RExC_parse - parse_start)
-
-/* Get offsets and lengths */
-#define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1])
-#define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)])
-
-#define Set_Node_Offset_Length(node,offset,len) STMT_START { \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (offset)); \
- Set_Node_Length_To_R((node)-RExC_emit_start, (len)); \
-} STMT_END
-#endif
-
-#if PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS
-#define EXPERIMENTAL_INPLACESCAN
-#endif /*RE_TRACK_PATTERN_OFFSETS*/
-
-#define DEBUG_STUDYDATA(str,data,depth) \
-DEBUG_OPTIMISE_MORE_r(if(data){ \
- PerlIO_printf(Perl_debug_log, \
- "%*s" str "Pos:%"IVdf"/%"IVdf \
- " Flags: 0x%"UVXf" Whilem_c: %"IVdf" Lcp: %"IVdf" %s", \
- (int)(depth)*2, "", \
- (IV)((data)->pos_min), \
- (IV)((data)->pos_delta), \
- (UV)((data)->flags), \
- (IV)((data)->whilem_c), \
- (IV)((data)->last_closep ? *((data)->last_closep) : -1), \
- is_inf ? "INF " : "" \
- ); \
- if ((data)->last_found) \
- PerlIO_printf(Perl_debug_log, \
- "Last:'%s' %"IVdf":%"IVdf"/%"IVdf" %sFixed:'%s' @ %"IVdf \
- " %sFloat: '%s' @ %"IVdf"/%"IVdf"", \
- SvPVX_const((data)->last_found), \
- (IV)((data)->last_end), \
- (IV)((data)->last_start_min), \
- (IV)((data)->last_start_max), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_fixed)) ? "*" : "", \
- SvPVX_const((data)->longest_fixed), \
- (IV)((data)->offset_fixed), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_float)) ? "*" : "", \
- SvPVX_const((data)->longest_float), \
- (IV)((data)->offset_float_min), \
- (IV)((data)->offset_float_max) \
- ); \
- PerlIO_printf(Perl_debug_log,"\n"); \
-});
-
-static void clear_re(pTHX_ void *r);
-
-/* Mark that we cannot extend a found fixed substring at this point.
- Update the longest found anchored substring and the longest found
- floating substrings if needed. */
-
-STATIC void
-S_scan_commit(pTHX_ const RExC_state_t *pRExC_state, scan_data_t *data, I32 *minlenp, int is_inf)
-{
- const STRLEN l = CHR_SVLEN(data->last_found);
- const STRLEN old_l = CHR_SVLEN(*data->longest);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_SCAN_COMMIT;
-
- if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) {
- SvSetMagicSV(*data->longest, data->last_found);
- if (*data->longest == data->longest_fixed) {
- data->offset_fixed = l ? data->last_start_min : data->pos_min;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL);
- else
- data->flags &= ~SF_FIX_BEFORE_EOL;
- data->minlen_fixed=minlenp;
- data->lookbehind_fixed=0;
- }
- else { /* *data->longest == data->longest_float */
- data->offset_float_min = l ? data->last_start_min : data->pos_min;
- data->offset_float_max = (l
- ? data->last_start_max
- : data->pos_min + data->pos_delta);
- if (is_inf || (U32)data->offset_float_max > (U32)I32_MAX)
- data->offset_float_max = I32_MAX;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL);
- else
- data->flags &= ~SF_FL_BEFORE_EOL;
- data->minlen_float=minlenp;
- data->lookbehind_float=0;
- }
- }
- SvCUR_set(data->last_found, 0);
- {
- SV * const sv = data->last_found;
- if (SvUTF8(sv) && SvMAGICAL(sv)) {
- MAGIC * const mg = mg_find(sv, PERL_MAGIC_utf8);
- if (mg)
- mg->mg_len = 0;
- }
- }
- data->last_end = -1;
- data->flags &= ~SF_BEFORE_EOL;
- DEBUG_STUDYDATA("commit: ",data,0);
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_anything(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_ANYTHING;
-
- ANYOF_CLASS_ZERO(cl);
- ANYOF_BITMAP_SETALL(cl);
- cl->flags = ANYOF_EOS|ANYOF_UNICODE_ALL;
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* Can match anything (initialization) */
-STATIC int
-S_cl_is_anything(const struct regnode_charclass_class *cl)
-{
- int value;
-
- PERL_ARGS_ASSERT_CL_IS_ANYTHING;
-
- for (value = 0; value <= ANYOF_MAX; value += 2)
- if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1))
- return 1;
- if (!(cl->flags & ANYOF_UNICODE_ALL))
- return 0;
- if (!ANYOF_BITMAP_TESTALLSET((const void*)cl))
- return 0;
- return 1;
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_init(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
-}
-
-STATIC void
-S_cl_init_zero(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT_ZERO;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* 'And' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_and(struct regnode_charclass_class *cl,
- const struct regnode_charclass_class *and_with)
-{
- PERL_ARGS_ASSERT_CL_AND;
-
- assert(and_with->type == ANYOF);
- if (!(and_with->flags & ANYOF_CLASS)
- && !(cl->flags & ANYOF_CLASS)
- && (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(and_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD)) {
- int i;
-
- if (and_with->flags & ANYOF_INVERT)
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= ~and_with->bitmap[i];
- else
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= and_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise, leave it along for a moment. */
- if (!(and_with->flags & ANYOF_EOS))
- cl->flags &= ~ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE_ALL && and_with->flags & ANYOF_UNICODE &&
- !(and_with->flags & ANYOF_INVERT)) {
- cl->flags &= ~ANYOF_UNICODE_ALL;
- cl->flags |= ANYOF_UNICODE;
- ARG_SET(cl, ARG(and_with));
- }
- if (!(and_with->flags & ANYOF_UNICODE_ALL) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE_ALL;
- if (!(and_with->flags & (ANYOF_UNICODE|ANYOF_UNICODE_ALL)) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE;
-}
-
-/* 'OR' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_or(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl, const struct regnode_charclass_class *or_with)
-{
- PERL_ARGS_ASSERT_CL_OR;
-
- if (or_with->flags & ANYOF_INVERT) {
- /* We do not use
- * (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2))
- * <= (B1 | !B2) | (CL1 | !CL2)
- * which is wasteful if CL2 is small, but we ignore CL2:
- * (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1
- * XXXX Can we handle case-fold? Unclear:
- * (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) =
- * (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i'))
- */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(or_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD) ) {
- int i;
-
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= ~or_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise */
- else {
- cl_anything(pRExC_state, cl);
- }
- } else {
- /* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && (!(or_with->flags & ANYOF_FOLD)
- || (cl->flags & ANYOF_FOLD)) ) {
- int i;
-
- /* OR char bitmap and class bitmap separately */
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= or_with->bitmap[i];
- if (or_with->flags & ANYOF_CLASS) {
- for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++)
- cl->classflags[i] |= or_with->classflags[i];
- cl->flags |= ANYOF_CLASS;
- }
- }
- else { /* XXXX: logic is complicated, leave it along for a moment. */
- cl_anything(pRExC_state, cl);
- }
- }
- if (or_with->flags & ANYOF_EOS)
- cl->flags |= ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE && or_with->flags & ANYOF_UNICODE &&
- ARG(cl) != ARG(or_with)) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
- if (or_with->flags & ANYOF_UNICODE_ALL) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
-}
-
-#define TRIE_LIST_ITEM(state,idx) (trie->states[state].trans.list)[ idx ]
-#define TRIE_LIST_CUR(state) ( TRIE_LIST_ITEM( state, 0 ).forid )
-#define TRIE_LIST_LEN(state) ( TRIE_LIST_ITEM( state, 0 ).newstate )
-#define TRIE_LIST_USED(idx) ( trie->states[state].trans.list ? (TRIE_LIST_CUR( idx ) - 1) : 0 )
-
-
-#ifdef DEBUGGING
-/*
- dump_trie(trie,widecharmap,revcharmap)
- dump_trie_interim_list(trie,widecharmap,revcharmap,next_alloc)
- dump_trie_interim_table(trie,widecharmap,revcharmap,next_alloc)
-
- These routines dump out a trie in a somewhat readable format.
- The _interim_ variants are used for debugging the interim
- tables that are used to generate the final compressed
- representation which is what dump_trie expects.
-
- Part of the reason for their existance is to provide a form
- of documentation as to how the different representations function.
-
-*/
-
-/*
- Dumps the final compressed table form of the trie to Perl_debug_log.
- Used for debugging make_trie().
-*/
-
-STATIC void
-S_dump_trie(pTHX_ const struct _reg_trie_data *trie, HV *widecharmap,
- AV *revcharmap, U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE;
-
- PerlIO_printf( Perl_debug_log, "%*sChar : %-6s%-6s%-4s ",
- (int)depth * 2 + 2,"",
- "Match","Base","Ofs" );
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ ) {
- SV ** const tmp = av_fetch( revcharmap, state, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
- PerlIO_printf( Perl_debug_log, "\n%*sState|-----------------------",
- (int)depth * 2 + 2,"");
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ )
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth, "--------");
- PerlIO_printf( Perl_debug_log, "\n");
-
- for( state = 1 ; state < trie->statecount ; state++ ) {
- const U32 base = trie->states[ state ].trans.base;
-
- PerlIO_printf( Perl_debug_log, "%*s#%4"UVXf"|", (int)depth * 2 + 2,"", (UV)state);
-
- if ( trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " W%4X", trie->states[ state ].wordnum );
- } else {
- PerlIO_printf( Perl_debug_log, "%6s", "" );
- }
-
- PerlIO_printf( Perl_debug_log, " @%4"UVXf" ", (UV)base );
-
- if ( base ) {
- U32 ofs = 0;
-
- while( ( base + ofs < trie->uniquecharcount ) ||
- ( base + ofs - trie->uniquecharcount < trie->lasttrans
- && trie->trans[ base + ofs - trie->uniquecharcount ].check != state))
- ofs++;
-
- PerlIO_printf( Perl_debug_log, "+%2"UVXf"[ ", (UV)ofs);
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- PerlIO_printf( Perl_debug_log, "%*"UVXf,
- colwidth,
- (UV)trie->trans[ base + ofs - trie->uniquecharcount ].next );
- } else {
- PerlIO_printf( Perl_debug_log, "%*s",colwidth," ." );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "]");
-
- }
- PerlIO_printf( Perl_debug_log, "\n" );
- }
-}
-/*
- Dumps a fully constructed but uncompressed trie in list form.
- List tries normally only are used for construction when the number of
- possible chars (trie->uniquecharcount) is very high.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_list(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_LIST;
-
- /* print out the table precompression. */
- PerlIO_printf( Perl_debug_log, "%*sState :Word | Transition Data\n%*s%s",
- (int)depth * 2 + 2,"", (int)depth * 2 + 2,"",
- "------:-----+-----------------\n" );
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U16 charid;
-
- PerlIO_printf( Perl_debug_log, "%*s %4"UVXf" :",
- (int)depth * 2 + 2,"", (UV)state );
- if ( ! trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, "%5s| ","");
- } else {
- PerlIO_printf( Perl_debug_log, "W%4x| ",
- trie->states[ state ].wordnum
- );
- }
- for( charid = 1 ; charid <= TRIE_LIST_USED( state ) ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, TRIE_LIST_ITEM(state,charid).forid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s:%3X=%4"UVXf" | ",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- ) ,
- TRIE_LIST_ITEM(state,charid).forid,
- (UV)TRIE_LIST_ITEM(state,charid).newstate
- );
- if (!(charid % 10))
- PerlIO_printf(Perl_debug_log, "\n%*s| ",
- (int)((depth * 2) + 14), "");
- }
- }
- PerlIO_printf( Perl_debug_log, "\n");
- }
-}
-
-/*
- Dumps a fully constructed but uncompressed trie in table form.
- This is the normal DFA style state transition table, with a few
- twists to facilitate compression later.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_table(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- U16 charid;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_TABLE;
-
- /*
- print out the table precompression so that we can do a visual check
- that they are identical.
- */
-
- PerlIO_printf( Perl_debug_log, "%*sChar : ",(int)depth * 2 + 2,"" );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, charid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "\n%*sState+-",(int)depth * 2 + 2,"" );
-
- for( charid=0 ; charid < trie->uniquecharcount ; charid++ ) {
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth,"--------");
- }
-
- PerlIO_printf( Perl_debug_log, "\n" );
-
- for( state=1 ; state < next_alloc ; state += trie->uniquecharcount ) {
-
- PerlIO_printf( Perl_debug_log, "%*s%4"UVXf" : ",
- (int)depth * 2 + 2,"",
- (UV)TRIE_NODENUM( state ) );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- UV v=(UV)SAFE_TRIE_NODENUM( trie->trans[ state + charid ].next );
- if (v)
- PerlIO_printf( Perl_debug_log, "%*"UVXf, colwidth, v );
- else
- PerlIO_printf( Perl_debug_log, "%*s", colwidth, "." );
- }
- if ( ! trie->states[ TRIE_NODENUM( state ) ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf")\n", (UV)trie->trans[ state ].check );
- } else {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf") W%4X\n", (UV)trie->trans[ state ].check,
- trie->states[ TRIE_NODENUM( state ) ].wordnum );
- }
- }
-}
-
-#endif
-
-/* make_trie(startbranch,first,last,tail,word_count,flags,depth)
- startbranch: the first branch in the whole branch sequence
- first : start branch of sequence of branch-exact nodes.
- May be the same as startbranch
- last : Thing following the last branch.
- May be the same as tail.
- tail : item following the branch sequence
- count : words in the sequence
- flags : currently the OP() type we will be building one of /EXACT(|F|Fl)/
- depth : indent depth
-
-Inplace optimizes a sequence of 2 or more Branch-Exact nodes into a TRIE node.
-
-A trie is an N'ary tree where the branches are determined by digital
-decomposition of the key. IE, at the root node you look up the 1st character and
-follow that branch repeat until you find the end of the branches. Nodes can be
-marked as "accepting" meaning they represent a complete word. Eg:
-
- /he|she|his|hers/
-
-would convert into the following structure. Numbers represent states, letters
-following numbers represent valid transitions on the letter from that state, if
-the number is in square brackets it represents an accepting state, otherwise it
-will be in parenthesis.
-
- +-h->+-e->[3]-+-r->(8)-+-s->[9]
- | |
- | (2)
- | |
- (1) +-i->(6)-+-s->[7]
- |
- +-s->(3)-+-h->(4)-+-e->[5]
-
- Accept Word Mapping: 3=>1 (he),5=>2 (she), 7=>3 (his), 9=>4 (hers)
-
-This shows that when matching against the string 'hers' we will begin at state 1
-read 'h' and move to state 2, read 'e' and move to state 3 which is accepting,
-then read 'r' and go to state 8 followed by 's' which takes us to state 9 which
-is also accepting. Thus we know that we can match both 'he' and 'hers' with a
-single traverse. We store a mapping from accepting to state to which word was
-matched, and then when we have multiple possibilities we try to complete the
-rest of the regex in the order in which they occured in the alternation.
-
-The only prior NFA like behaviour that would be changed by the TRIE support is
-the silent ignoring of duplicate alternations which are of the form:
-
- / (DUPE|DUPE) X? (?{ ... }) Y /x
-
-Thus EVAL blocks follwing a trie may be called a different number of times with
-and without the optimisation. With the optimisations dupes will be silently
-ignored. This inconsistant behaviour of EVAL type nodes is well established as
-the following demonstrates:
-
- 'words'=~/(word|word|word)(?{ print $1 })[xyz]/
-
-which prints out 'word' three times, but
-
- 'words'=~/(word|word|word)(?{ print $1 })S/
-
-which doesnt print it out at all. This is due to other optimisations kicking in.
-
-Example of what happens on a structural level:
-
-The regexp /(ac|ad|ab)+/ will produce the folowing debug output:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: BRANCH(8)
- 6: EXACT <ac>(16)
- 8: BRANCH(11)
- 9: EXACT <ad>(16)
- 11: BRANCH(14)
- 12: EXACT <ab>(16)
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-This would be optimizable with startbranch=5, first=5, last=16, tail=16
-and should turn into:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: TRIE(16)
- [Words:3 Chars Stored:6 Unique Chars:4 States:5 NCP:1]
- <ac>
- <ad>
- <ab>
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-Cases where tail != last would be like /(?foo|bar)baz/:
-
- 1: BRANCH(4)
- 2: EXACT <foo>(8)
- 4: BRANCH(7)
- 5: EXACT <bar>(8)
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
-which would be optimizable with startbranch=1, first=1, last=7, tail=8
-and would end up looking like:
-
- 1: TRIE(8)
- [Words:2 Chars Stored:6 Unique Chars:5 States:7 NCP:1]
- <foo>
- <bar>
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
- d = uvuni_to_utf8_flags(d, uv, 0);
-
-is the recommended Unicode-aware way of saying
-
- *(d++) = uv;
-*/
-
-#define TRIE_STORE_REVCHAR \
- STMT_START { \
- if (UTF) { \
- SV *zlopp = newSV(2); \
- unsigned char *flrbbbbb = (unsigned char *) SvPVX(zlopp); \
- unsigned const char *const kapow = uvuni_to_utf8(flrbbbbb, uvc & 0xFF); \
- SvCUR_set(zlopp, kapow - flrbbbbb); \
- SvPOK_on(zlopp); \
- SvUTF8_on(zlopp); \
- av_push(revcharmap, zlopp); \
- } else { \
- char ooooff = (char)uvc; \
- av_push(revcharmap, newSVpvn(&ooooff, 1)); \
- } \
- } STMT_END
-
-#define TRIE_READ_CHAR STMT_START { \
- wordlen++; \
- if ( UTF ) { \
- if ( folder ) { \
- if ( foldlen > 0 ) { \
- uvc = utf8n_to_uvuni( scan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- scan += len; \
- len = 0; \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- scan = foldbuf + UNISKIP( uvc ); \
- } \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- } \
- } else { \
- uvc = (U32)*uc; \
- len = 1; \
- } \
-} STMT_END
-
-
-
-#define TRIE_LIST_PUSH(state,fid,ns) STMT_START { \
- if ( TRIE_LIST_CUR( state ) >=TRIE_LIST_LEN( state ) ) { \
- U32 ging = TRIE_LIST_LEN( state ) *= 2; \
- Renew( trie->states[ state ].trans.list, ging, reg_trie_trans_le ); \
- } \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).forid = fid; \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).newstate = ns; \
- TRIE_LIST_CUR( state )++; \
-} STMT_END
-
-#define TRIE_LIST_NEW(state) STMT_START { \
- Newxz( trie->states[ state ].trans.list, \
- 4, reg_trie_trans_le ); \
- TRIE_LIST_CUR( state ) = 1; \
- TRIE_LIST_LEN( state ) = 4; \
-} STMT_END
-
-#define TRIE_HANDLE_WORD(state) STMT_START { \
- U16 dupe= trie->states[ state ].wordnum; \
- regnode * const noper_next = regnext( noper ); \
- \
- if (trie->wordlen) \
- trie->wordlen[ curword ] = wordlen; \
- DEBUG_r({ \
- /* store the word for dumping */ \
- SV* tmp; \
- if (OP(noper) != NOTHING) \
- tmp = newSVpvn_utf8(STRING(noper), STR_LEN(noper), UTF); \
- else \
- tmp = newSVpvn_utf8( "", 0, UTF ); \
- av_push( trie_words, tmp ); \
- }); \
- \
- curword++; \
- \
- if ( noper_next < tail ) { \
- if (!trie->jump) \
- trie->jump = (U16 *) PerlMemShared_calloc( word_count + 1, sizeof(U16) ); \
- trie->jump[curword] = (U16)(noper_next - convert); \
- if (!jumper) \
- jumper = noper_next; \
- if (!nextbranch) \
- nextbranch= regnext(cur); \
- } \
- \
- if ( dupe ) { \
- /* So it's a dupe. This means we need to maintain a */\
- /* linked-list from the first to the next. */\
- /* we only allocate the nextword buffer when there */\
- /* a dupe, so first time we have to do the allocation */\
- if (!trie->nextword) \
- trie->nextword = (U16 *) \
- PerlMemShared_calloc( word_count + 1, sizeof(U16)); \
- while ( trie->nextword[dupe] ) \
- dupe= trie->nextword[dupe]; \
- trie->nextword[dupe]= curword; \
- } else { \
- /* we haven't inserted this word yet. */ \
- trie->states[ state ].wordnum = curword; \
- } \
-} STMT_END
-
-
-#define TRIE_TRANS_STATE(state,base,ucharcount,charid,special) \
- ( ( base + charid >= ucharcount \
- && base + charid < ubound \
- && state == trie->trans[ base - ucharcount + charid ].check \
- && trie->trans[ base - ucharcount + charid ].next ) \
- ? trie->trans[ base - ucharcount + charid ].next \
- : ( state==1 ? special : 0 ) \
- )
-
-#define MADE_TRIE 1
-#define MADE_JUMP_TRIE 2
-#define MADE_EXACT_TRIE 4
-
-STATIC I32
-S_make_trie(pTHX_ RExC_state_t *pRExC_state, regnode *startbranch, regnode *first, regnode *last, regnode *tail, U32 word_count, U32 flags, U32 depth)
-{
- dVAR;
- /* first pass, loop through and scan words */
- reg_trie_data *trie;
- HV *widecharmap = NULL;
- AV *revcharmap = newAV();
- regnode *cur;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- STRLEN len = 0;
- UV uvc = 0;
- U16 curword = 0;
- U32 next_alloc = 0;
- regnode *jumper = NULL;
- regnode *nextbranch = NULL;
- regnode *convert = NULL;
- /* we just use folder as a flag in utf8 */
- const U8 * const folder = ( flags == EXACTF
- ? PL_fold
- : ( flags == EXACTFL
- ? PL_fold_locale
- : NULL
- )
- );
-
-#ifdef DEBUGGING
- const U32 data_slot = add_data( pRExC_state, 4, "tuuu" );
- AV *trie_words = NULL;
- /* along with revcharmap, this only used during construction but both are
- * useful during debugging so we store them in the struct when debugging.
- */
-#else
- const U32 data_slot = add_data( pRExC_state, 2, "tu" );
- STRLEN trie_charcount=0;
-#endif
- SV *re_trie_maxbuff;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- trie = (reg_trie_data *) PerlMemShared_calloc( 1, sizeof(reg_trie_data) );
- trie->refcount = 1;
- trie->startstate = 1;
- trie->wordcount = word_count;
- RExC_rxi->data->data[ data_slot ] = (void*)trie;
- trie->charmap = (U16 *) PerlMemShared_calloc( 256, sizeof(U16) );
- if (!(UTF && folder))
- trie->bitmap = (char *) PerlMemShared_calloc( ANYOF_BITMAP_SIZE, 1 );
- DEBUG_r({
- trie_words = newAV();
- });
-
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff)) {
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- DEBUG_OPTIMISE_r({
- PerlIO_printf( Perl_debug_log,
- "%*smake_trie start==%d, first==%d, last==%d, tail==%d depth=%d\n",
- (int)depth * 2 + 2, "",
- REG_NODE_NUM(startbranch),REG_NODE_NUM(first),
- REG_NODE_NUM(last), REG_NODE_NUM(tail),
- (int)depth);
- });
-
- /* Find the node we are going to overwrite */
- if ( first == startbranch && OP( last ) != BRANCH ) {
- /* whole branch chain */
- convert = first;
- } else {
- /* branch sub-chain */
- convert = NEXTOPER( first );
- }
-
- /* -- First loop and Setup --
-
- We first traverse the branches and scan each word to determine if it
- contains widechars, and how many unique chars there are, this is
- important as we have to build a table with at least as many columns as we
- have unique chars.
-
- We use an array of integers to represent the character codes 0..255
- (trie->charmap) and we use a an HV* to store Unicode characters. We use the
- native representation of the character value as the key and IV's for the
- coded index.
-
- *TODO* If we keep track of how many times each character is used we can
- remap the columns so that the table compression later on is more
- efficient in terms of memory by ensuring most common value is in the
- middle and the least common are on the outside. IMO this would be better
- than a most to least common mapping as theres a decent chance the most
- common letter will share a node with the least common, meaning the node
- will not be compressable. With a middle is most common approach the worst
- case is when we have the least common nodes twice.
-
- */
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- STRLEN foldlen = 0;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- const U8 *scan = (U8*)NULL;
- U32 wordlen = 0; /* required init */
- STRLEN chars = 0;
- bool set_bit = trie->bitmap ? 1 : 0; /*store the first char in the bitmap?*/
-
- if (OP(noper) == NOTHING) {
- trie->minlen= 0;
- continue;
- }
- if ( set_bit ) /* bitmap only alloced when !(UTF&&Folding) */
- TRIE_BITMAP_SET(trie,*uc); /* store the raw first byte
- regardless of encoding */
-
- for ( ; uc < e ; uc += len ) {
- TRIE_CHARCOUNT(trie)++;
- TRIE_READ_CHAR;
- chars++;
- if ( uvc < 256 ) {
- if ( !trie->charmap[ uvc ] ) {
- trie->charmap[ uvc ]=( ++trie->uniquecharcount );
- if ( folder )
- trie->charmap[ folder[ uvc ] ] = trie->charmap[ uvc ];
- TRIE_STORE_REVCHAR;
- }
- if ( set_bit ) {
- /* store the codepoint in the bitmap, and if its ascii
- also store its folded equivelent. */
- TRIE_BITMAP_SET(trie,uvc);
-
- /* store the folded codepoint */
- if ( folder ) TRIE_BITMAP_SET(trie,folder[ uvc ]);
-
- if ( !UTF ) {
- /* store first byte of utf8 representation of
- codepoints in the 127 < uvc < 256 range */
- if (127 < uvc && uvc < 192) {
- TRIE_BITMAP_SET(trie,194);
- } else if (191 < uvc ) {
- TRIE_BITMAP_SET(trie,195);
- /* && uvc < 256 -- we know uvc is < 256 already */
- }
- }
- set_bit = 0; /* We've done our bit :-) */
- }
- } else {
- SV** svpp;
- if ( !widecharmap )
- widecharmap = newHV();
-
- svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 1 );
-
- if ( !svpp )
- Perl_croak( aTHX_ "error creating/fetching widecharmap entry for 0x%"UVXf, uvc );
-
- if ( !SvTRUE( *svpp ) ) {
- sv_setiv( *svpp, ++trie->uniquecharcount );
- TRIE_STORE_REVCHAR;
- }
- }
- }
- if( cur == first ) {
- trie->minlen=chars;
- trie->maxlen=chars;
- } else if (chars < trie->minlen) {
- trie->minlen=chars;
- } else if (chars > trie->maxlen) {
- trie->maxlen=chars;
- }
-
- } /* end first pass */
- DEBUG_TRIE_COMPILE_r(
- PerlIO_printf( Perl_debug_log, "%*sTRIE(%s): W:%d C:%d Uq:%d Min:%d Max:%d\n",
- (int)depth * 2 + 2,"",
- ( widecharmap ? "UTF8" : "NATIVE" ), (int)word_count,
- (int)TRIE_CHARCOUNT(trie), trie->uniquecharcount,
- (int)trie->minlen, (int)trie->maxlen )
- );
- trie->wordlen = (U32 *) PerlMemShared_calloc( word_count, sizeof(U32) );
-
- /*
- We now know what we are dealing with in terms of unique chars and
- string sizes so we can calculate how much memory a naive
- representation using a flat table will take. If it's over a reasonable
- limit (as specified by ${^RE_TRIE_MAXBUF}) we use a more memory
- conservative but potentially much slower representation using an array
- of lists.
-
- At the end we convert both representations into the same compressed
- form that will be used in regexec.c for matching with. The latter
- is a form that cannot be used to construct with but has memory
- properties similar to the list form and access properties similar
- to the table form making it both suitable for fast searches and
- small enough that its feasable to store for the duration of a program.
-
- See the comment in the code where the compressed table is produced
- inplace from the flat tabe representation for an explanation of how
- the compression works.
-
- */
-
-
- if ( (IV)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1) > SvIV(re_trie_maxbuff) ) {
- /*
- Second Pass -- Array Of Lists Representation
-
- Each state will be represented by a list of charid:state records
- (reg_trie_trans_le) the first such element holds the CUR and LEN
- points of the allocated array. (See defines above).
-
- We build the initial structure using the lists, and then convert
- it into the compressed table form which allows faster lookups
- (but cant be modified once converted).
- */
-
- STRLEN transcount = 1;
-
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using list compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- TRIE_LIST_NEW(1);
- next_alloc = 2;
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- U32 state = 1; /* required init */
- U16 charid = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if (OP(noper) != NOTHING) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV** const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- if ( !svpp ) {
- charid = 0;
- } else {
- charid=(U16)SvIV( *svpp );
- }
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- if ( charid ) {
-
- U16 check;
- U32 newstate = 0;
-
- charid--;
- if ( !trie->states[ state ].trans.list ) {
- TRIE_LIST_NEW( state );
- }
- for ( check = 1; check <= TRIE_LIST_USED( state ); check++ ) {
- if ( TRIE_LIST_ITEM( state, check ).forid == charid ) {
- newstate = TRIE_LIST_ITEM( state, check ).newstate;
- break;
- }
- }
- if ( ! newstate ) {
- newstate = next_alloc++;
- TRIE_LIST_PUSH( state, charid, newstate );
- transcount++;
- }
- state = newstate;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- }
- }
- TRIE_HANDLE_WORD(state);
-
- } /* end second pass */
-
- /* next alloc is the NEXT state to be allocated */
- trie->statecount = next_alloc;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states,
- next_alloc
- * sizeof(reg_trie_state) );
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_list(trie, widecharmap,
- revcharmap, next_alloc,
- depth+1)
- );
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( transcount, sizeof(reg_trie_trans) );
- {
- U32 state;
- U32 tp = 0;
- U32 zp = 0;
-
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U32 base=0;
-
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, "tp: %d zp: %d ",tp,zp)
- );
- */
-
- if (trie->states[state].trans.list) {
- U16 minid=TRIE_LIST_ITEM( state, 1).forid;
- U16 maxid=minid;
- U16 idx;
-
- for( idx = 2 ; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U16 forid = TRIE_LIST_ITEM( state, idx).forid;
- if ( forid < minid ) {
- minid=forid;
- } else if ( forid > maxid ) {
- maxid=forid;
- }
- }
- if ( transcount < tp + maxid - minid + 1) {
- transcount *= 2;
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans,
- transcount
- * sizeof(reg_trie_trans) );
- Zero( trie->trans + (transcount / 2), transcount / 2 , reg_trie_trans );
- }
- base = trie->uniquecharcount + tp - minid;
- if ( maxid == minid ) {
- U32 set = 0;
- for ( ; zp < tp ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- base = trie->uniquecharcount + zp - minid;
- trie->trans[ zp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ zp ].check = state;
- set = 1;
- break;
- }
- }
- if ( !set ) {
- trie->trans[ tp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ tp ].check = state;
- tp++;
- zp = tp;
- }
- } else {
- for ( idx=1; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U32 tid = base - trie->uniquecharcount + TRIE_LIST_ITEM( state, idx ).forid;
- trie->trans[ tid ].next = TRIE_LIST_ITEM( state, idx ).newstate;
- trie->trans[ tid ].check = state;
- }
- tp += ( maxid - minid + 1 );
- }
- Safefree(trie->states[ state ].trans.list);
- }
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, " base: %d\n",base);
- );
- */
- trie->states[ state ].trans.base=base;
- }
- trie->lasttrans = tp + 1;
- }
- } else {
- /*
- Second Pass -- Flat Table Representation.
-
- we dont use the 0 slot of either trans[] or states[] so we add 1 to each.
- We know that we will need Charcount+1 trans at most to store the data
- (one row per char at worst case) So we preallocate both structures
- assuming worst case.
-
- We then construct the trie using only the .next slots of the entry
- structs.
-
- We use the .check field of the first entry of the node temporarily to
- make compression both faster and easier by keeping track of how many non
- zero fields are in the node.
-
- Since trans are numbered from 1 any 0 pointer in the table is a FAIL
- transition.
-
- There are two terms at use here: state as a TRIE_NODEIDX() which is a
- number representing the first entry of the node, and state as a
- TRIE_NODENUM() which is the trans number. state 1 is TRIE_NODEIDX(1) and
- TRIE_NODENUM(1), state 2 is TRIE_NODEIDX(2) and TRIE_NODENUM(3) if there
- are 2 entrys per node. eg:
-
- A B A B
- 1. 2 4 1. 3 7
- 2. 0 3 3. 0 5
- 3. 0 0 5. 0 0
- 4. 0 0 7. 0 0
-
- The table is internally in the right hand, idx form. However as we also
- have to deal with the states array which is indexed by nodenum we have to
- use TRIE_NODENUM() to convert.
-
- */
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using table compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( ( TRIE_CHARCOUNT(trie) + 1 )
- * trie->uniquecharcount + 1,
- sizeof(reg_trie_trans) );
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- next_alloc = trie->uniquecharcount + 1;
-
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
-
- U32 state = 1; /* required init */
-
- U16 charid = 0; /* sanity init */
- U32 accept_state = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
-
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if ( OP(noper) != NOTHING ) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV* const * const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- charid = svpp ? (U16)SvIV(*svpp) : 0;
- }
- if ( charid ) {
- charid--;
- if ( !trie->trans[ state + charid ].next ) {
- trie->trans[ state + charid ].next = next_alloc;
- trie->trans[ state ].check++;
- next_alloc += trie->uniquecharcount;
- }
- state = trie->trans[ state + charid ].next;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- }
- }
- accept_state = TRIE_NODENUM( state );
- TRIE_HANDLE_WORD(accept_state);
-
- } /* end second pass */
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_table(trie, widecharmap,
- revcharmap,
- next_alloc, depth+1));
-
- {
- /*
- * Inplace compress the table.*
-
- For sparse data sets the table constructed by the trie algorithm will
- be mostly 0/FAIL transitions or to put it another way mostly empty.
- (Note that leaf nodes will not contain any transitions.)
-
- This algorithm compresses the tables by eliminating most such
- transitions, at the cost of a modest bit of extra work during lookup:
-
- - Each states[] entry contains a .base field which indicates the
- index in the state[] array wheres its transition data is stored.
-
- - If .base is 0 there are no valid transitions from that node.
-
- - If .base is nonzero then charid is added to it to find an entry in
- the trans array.
-
- -If trans[states[state].base+charid].check!=state then the
- transition is taken to be a 0/Fail transition. Thus if there are fail
- transitions at the front of the node then the .base offset will point
- somewhere inside the previous nodes data (or maybe even into a node
- even earlier), but the .check field determines if the transition is
- valid.
-
- XXX - wrong maybe?
- The following process inplace converts the table to the compressed
- table: We first do not compress the root node 1,and mark its all its
- .check pointers as 1 and set its .base pointer as 1 as well. This
- allows to do a DFA construction from the compressed table later, and
- ensures that any .base pointers we calculate later are greater than
- 0.
-
- - We set 'pos' to indicate the first entry of the second node.
-
- - We then iterate over the columns of the node, finding the first and
- last used entry at l and m. We then copy l..m into pos..(pos+m-l),
- and set the .check pointers accordingly, and advance pos
- appropriately and repreat for the next node. Note that when we copy
- the next pointers we have to convert them from the original
- NODEIDX form to NODENUM form as the former is not valid post
- compression.
-
- - If a node has no transitions used we mark its base as 0 and do not
- advance the pos pointer.
-
- - If a node only has one transition we use a second pointer into the
- structure to fill in allocated fail transitions from other states.
- This pointer is independent of the main pointer and scans forward
- looking for null transitions that are allocated to a state. When it
- finds one it writes the single transition into the "hole". If the
- pointer doesnt find one the single transition is appended as normal.
-
- - Once compressed we can Renew/realloc the structures to release the
- excess space.
-
- See "Table-Compression Methods" in sec 3.9 of the Red Dragon,
- specifically Fig 3.47 and the associated pseudocode.
-
- demq
- */
- const U32 laststate = TRIE_NODENUM( next_alloc );
- U32 state, charid;
- U32 pos = 0, zp=0;
- trie->statecount = laststate;
-
- for ( state = 1 ; state < laststate ; state++ ) {
- U8 flag = 0;
- const U32 stateidx = TRIE_NODEIDX( state );
- const U32 o_used = trie->trans[ stateidx ].check;
- U32 used = trie->trans[ stateidx ].check;
- trie->trans[ stateidx ].check = 0;
-
- for ( charid = 0 ; used && charid < trie->uniquecharcount ; charid++ ) {
- if ( flag || trie->trans[ stateidx + charid ].next ) {
- if ( trie->trans[ stateidx + charid ].next ) {
- if (o_used == 1) {
- for ( ; zp < pos ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- break;
- }
- }
- trie->states[ state ].trans.base = zp + trie->uniquecharcount - charid ;
- trie->trans[ zp ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ zp ].check = state;
- if ( ++zp > pos ) pos = zp;
- break;
- }
- used--;
- }
- if ( !flag ) {
- flag = 1;
- trie->states[ state ].trans.base = pos + trie->uniquecharcount - charid ;
- }
- trie->trans[ pos ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ pos ].check = state;
- pos++;
- }
- }
- }
- trie->lasttrans = pos + 1;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states, laststate
- * sizeof(reg_trie_state) );
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log,
- "%*sAlloc: %d Orig: %"IVdf" elements, Final:%"IVdf". Savings of %%%5.2f\n",
- (int)depth * 2 + 2,"",
- (int)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1 ),
- (IV)next_alloc,
- (IV)pos,
- ( ( next_alloc - pos ) * 100 ) / (double)next_alloc );
- );
-
- } /* end table compress */
- }
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf(Perl_debug_log, "%*sStatecount:%"UVxf" Lasttrans:%"UVxf"\n",
- (int)depth * 2 + 2, "",
- (UV)trie->statecount,
- (UV)trie->lasttrans)
- );
- /* resize the trans array to remove unused space */
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans, trie->lasttrans
- * sizeof(reg_trie_trans) );
-
- /* and now dump out the compressed format */
- DEBUG_TRIE_COMPILE_r(dump_trie(trie, widecharmap, revcharmap, depth+1));
-
- { /* Modify the program and insert the new TRIE node*/
- U8 nodetype =(U8)(flags & 0xFF);
- char *str=NULL;
-
-#ifdef DEBUGGING
- regnode *optimize = NULL;
-#ifdef RE_TRACK_PATTERN_OFFSETS
-
- U32 mjd_offset = 0;
- U32 mjd_nodelen = 0;
-#endif /* RE_TRACK_PATTERN_OFFSETS */
-#endif /* DEBUGGING */
- /*
- This means we convert either the first branch or the first Exact,
- depending on whether the thing following (in 'last') is a branch
- or not and whther first is the startbranch (ie is it a sub part of
- the alternation or is it the whole thing.)
- Assuming its a sub part we conver the EXACT otherwise we convert
- the whole branch sequence, including the first.
- */
- /* Find the node we are going to overwrite */
- if ( first != startbranch || OP( last ) == BRANCH ) {
- /* branch sub-chain */
- NEXT_OFF( first ) = (U16)(last - first);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_r({
- mjd_offset= Node_Offset((convert));
- mjd_nodelen= Node_Length((convert));
- });
-#endif
- /* whole branch chain */
- }
-#ifdef RE_TRACK_PATTERN_OFFSETS
- else {
- DEBUG_r({
- const regnode *nop = NEXTOPER( convert );
- mjd_offset= Node_Offset((nop));
- mjd_nodelen= Node_Length((nop));
- });
- }
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%*sMJD offset:%"UVuf" MJD length:%"UVuf"\n",
- (int)depth * 2 + 2, "",
- (UV)mjd_offset, (UV)mjd_nodelen)
- );
-#endif
- /* But first we check to see if there is a common prefix we can
- split out as an EXACT and put in front of the TRIE node. */
- trie->startstate= 1;
- if ( trie->bitmap && !widecharmap && !trie->jump ) {
- U32 state;
- for ( state = 1 ; state < trie->statecount-1 ; state++ ) {
- U32 ofs = 0;
- I32 idx = -1;
- U32 count = 0;
- const U32 base = trie->states[ state ].trans.base;
-
- if ( trie->states[state].wordnum )
- count = 1;
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- if ( ++count > 1 ) {
- SV **tmp = av_fetch( revcharmap, ofs, 0);
- const U8 *ch = (U8*)SvPV_nolen_const( *tmp );
- if ( state == 1 ) break;
- if ( count == 2 ) {
- Zero(trie->bitmap, ANYOF_BITMAP_SIZE, char);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*sNew Start State=%"UVuf" Class: [",
- (int)depth * 2 + 2, "",
- (UV)state));
- if (idx >= 0) {
- SV ** const tmp = av_fetch( revcharmap, idx, 0);
- const U8 * const ch = (U8*)SvPV_nolen_const( *tmp );
-
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie, folder[ *ch ]);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%s", (char*)ch)
- );
- }
- }
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie,folder[ *ch ]);
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"%s", ch));
- }
- idx = ofs;
- }
- }
- if ( count == 1 ) {
- SV **tmp = av_fetch( revcharmap, idx, 0);
- STRLEN len;
- char *ch = SvPV( *tmp, len );
- DEBUG_OPTIMISE_r({
- SV *sv=sv_newmortal();
- PerlIO_printf( Perl_debug_log,
- "%*sPrefix State: %"UVuf" Idx:%"UVuf" Char='%s'\n",
- (int)depth * 2 + 2, "",
- (UV)state, (UV)idx,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 6,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- });
- if ( state==1 ) {
- OP( convert ) = nodetype;
- str=STRING(convert);
- STR_LEN(convert)=0;
- }
- STR_LEN(convert) += len;
- while (len--)
- *str++ = *ch++;
- } else {
-#ifdef DEBUGGING
- if (state>1)
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"]\n"));
-#endif
- break;
- }
- }
- if (str) {
- regnode *n = convert+NODE_SZ_STR(convert);
- NEXT_OFF(convert) = NODE_SZ_STR(convert);
- trie->startstate = state;
- trie->minlen -= (state - 1);
- trie->maxlen -= (state - 1);
-#ifdef DEBUGGING
- /* At least the UNICOS C compiler choked on this
- * being argument to DEBUG_r(), so let's just have
- * it right here. */
- if (
-#ifdef PERL_EXT_RE_BUILD
- 1
-#else
- DEBUG_r_TEST
-#endif
- ) {
- regnode *fix = convert;
- U32 word = trie->wordcount;
- mjd_nodelen++;
- Set_Node_Offset_Length(convert, mjd_offset, state - 1);
- while( ++fix < n ) {
- Set_Node_Offset_Length(fix, 0, 0);
- }
- while (word--) {
- SV ** const tmp = av_fetch( trie_words, word, 0 );
- if (tmp) {
- if ( STR_LEN(convert) <= SvCUR(*tmp) )
- sv_chop(*tmp, SvPV_nolen(*tmp) + STR_LEN(convert));
- else
- sv_chop(*tmp, SvPV_nolen(*tmp) + SvCUR(*tmp));
- }
- }
- }
-#endif
- if (trie->maxlen) {
- convert = n;
- } else {
- NEXT_OFF(convert) = (U16)(tail - convert);
- DEBUG_r(optimize= n);
- }
- }
- }
- if (!jumper)
- jumper = last;
- if ( trie->maxlen ) {
- NEXT_OFF( convert ) = (U16)(tail - convert);
- ARG_SET( convert, data_slot );
- /* Store the offset to the first unabsorbed branch in
- jump[0], which is otherwise unused by the jump logic.
- We use this when dumping a trie and during optimisation. */
- if (trie->jump)
- trie->jump[0] = (U16)(nextbranch - convert);
-
- /* XXXX */
- if ( !trie->states[trie->startstate].wordnum && trie->bitmap &&
- ( (char *)jumper - (char *)convert) >= (int)sizeof(struct regnode_charclass) )
- {
- OP( convert ) = TRIEC;
- Copy(trie->bitmap, ((struct regnode_charclass *)convert)->bitmap, ANYOF_BITMAP_SIZE, char);
- PerlMemShared_free(trie->bitmap);
- trie->bitmap= NULL;
- } else
- OP( convert ) = TRIE;
-
- /* store the type in the flags */
- convert->flags = nodetype;
- DEBUG_r({
- optimize = convert
- + NODE_STEP_REGNODE
- + regarglen[ OP( convert ) ];
- });
- /* XXX We really should free up the resource in trie now,
- as we won't use them - (which resources?) dmq */
- }
- /* needed for dumping*/
- DEBUG_r(if (optimize) {
- regnode *opt = convert;
-
- while ( ++opt < optimize) {
- Set_Node_Offset_Length(opt,0,0);
- }
- /*
- Try to clean up some of the debris left after the
- optimisation.
- */
- while( optimize < jumper ) {
- mjd_nodelen += Node_Length((optimize));
- OP( optimize ) = OPTIMIZED;
- Set_Node_Offset_Length(optimize,0,0);
- optimize++;
- }
- Set_Node_Offset_Length(convert,mjd_offset,mjd_nodelen);
- });
- } /* end node insert */
- RExC_rxi->data->data[ data_slot + 1 ] = (void*)widecharmap;
-#ifdef DEBUGGING
- RExC_rxi->data->data[ data_slot + TRIE_WORDS_OFFSET ] = (void*)trie_words;
- RExC_rxi->data->data[ data_slot + 3 ] = (void*)revcharmap;
-#else
- SvREFCNT_dec(revcharmap);
-#endif
- return trie->jump
- ? MADE_JUMP_TRIE
- : trie->startstate>1
- ? MADE_EXACT_TRIE
- : MADE_TRIE;
-}
-
-STATIC void
-S_make_trie_failtable(pTHX_ RExC_state_t *pRExC_state, regnode *source, regnode *stclass, U32 depth)
-{
-/* The Trie is constructed and compressed now so we can build a fail array now if its needed
-
- This is basically the Aho-Corasick algorithm. Its from exercise 3.31 and 3.32 in the
- "Red Dragon" -- Compilers, principles, techniques, and tools. Aho, Sethi, Ullman 1985/88
- ISBN 0-201-10088-6
-
- We find the fail state for each state in the trie, this state is the longest proper
- suffix of the current states 'word' that is also a proper prefix of another word in our
- trie. State 1 represents the word '' and is the thus the default fail state. This allows
- the DFA not to have to restart after its tried and failed a word at a given point, it
- simply continues as though it had been matching the other word in the first place.
- Consider
- 'abcdgu'=~/abcdefg|cdgu/
- When we get to 'd' we are still matching the first word, we would encounter 'g' which would
- fail, which would bring use to the state representing 'd' in the second word where we would
- try 'g' and succeed, prodceding to match 'cdgu'.
- */
- /* add a fail transition */
- const U32 trie_offset = ARG(source);
- reg_trie_data *trie=(reg_trie_data *)RExC_rxi->data->data[trie_offset];
- U32 *q;
- const U32 ucharcount = trie->uniquecharcount;
- const U32 numstates = trie->statecount;
- const U32 ubound = trie->lasttrans + ucharcount;
- U32 q_read = 0;
- U32 q_write = 0;
- U32 charid;
- U32 base = trie->states[ 1 ].trans.base;
- U32 *fail;
- reg_ac_data *aho;
- const U32 data_slot = add_data( pRExC_state, 1, "T" );
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE_FAILTABLE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
-
- ARG_SET( stclass, data_slot );
- aho = (reg_ac_data *) PerlMemShared_calloc( 1, sizeof(reg_ac_data) );
- RExC_rxi->data->data[ data_slot ] = (void*)aho;
- aho->trie=trie_offset;
- aho->states=(reg_trie_state *)PerlMemShared_malloc( numstates * sizeof(reg_trie_state) );
- Copy( trie->states, aho->states, numstates, reg_trie_state );
- Newxz( q, numstates, U32);
- aho->fail = (U32 *) PerlMemShared_calloc( numstates, sizeof(U32) );
- aho->refcount = 1;
- fail = aho->fail;
- /* initialize fail[0..1] to be 1 so that we always have
- a valid final fail state */
- fail[ 0 ] = fail[ 1 ] = 1;
-
- for ( charid = 0; charid < ucharcount ; charid++ ) {
- const U32 newstate = TRIE_TRANS_STATE( 1, base, ucharcount, charid, 0 );
- if ( newstate ) {
- q[ q_write ] = newstate;
- /* set to point at the root */
- fail[ q[ q_write++ ] ]=1;
- }
- }
- while ( q_read < q_write) {
- const U32 cur = q[ q_read++ % numstates ];
- base = trie->states[ cur ].trans.base;
-
- for ( charid = 0 ; charid < ucharcount ; charid++ ) {
- const U32 ch_state = TRIE_TRANS_STATE( cur, base, ucharcount, charid, 1 );
- if (ch_state) {
- U32 fail_state = cur;
- U32 fail_base;
- do {
- fail_state = fail[ fail_state ];
- fail_base = aho->states[ fail_state ].trans.base;
- } while ( !TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ) );
-
- fail_state = TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 );
- fail[ ch_state ] = fail_state;
- if ( !aho->states[ ch_state ].wordnum && aho->states[ fail_state ].wordnum )
- {
- aho->states[ ch_state ].wordnum = aho->states[ fail_state ].wordnum;
- }
- q[ q_write++ % numstates] = ch_state;
- }
- }
- }
- /* restore fail[0..1] to 0 so that we "fall out" of the AC loop
- when we fail in state 1, this allows us to use the
- charclass scan to find a valid start char. This is based on the principle
- that theres a good chance the string being searched contains lots of stuff
- that cant be a start char.
- */
- fail[ 0 ] = fail[ 1 ] = 0;
- DEBUG_TRIE_COMPILE_r({
- PerlIO_printf(Perl_debug_log,
- "%*sStclass Failtable (%"UVuf" states): 0",
- (int)(depth * 2), "", (UV)numstates
- );
- for( q_read=1; q_read<numstates; q_read++ ) {
- PerlIO_printf(Perl_debug_log, ", %"UVuf, (UV)fail[q_read]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
- Safefree(q);
- /*RExC_seen |= REG_SEEN_TRIEDFA;*/
-}
-
-
-/*
- * There are strange code-generation bugs caused on sparc64 by gcc-2.95.2.
- * These need to be revisited when a newer toolchain becomes available.
- */
-#if defined(__sparc64__) && defined(__GNUC__)
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
-# undef SPARC64_GCC_WORKAROUND
-# define SPARC64_GCC_WORKAROUND 1
-# endif
-#endif
-
-#define DEBUG_PEEP(str,scan,depth) \
- DEBUG_OPTIMISE_r({if (scan){ \
- SV * const mysv=sv_newmortal(); \
- regnode *Next = regnext(scan); \
- regprop(RExC_rx, mysv, scan); \
- PerlIO_printf(Perl_debug_log, "%*s" str ">%3d: %s (%d)\n", \
- (int)depth*2, "", REG_NODE_NUM(scan), SvPV_nolen_const(mysv),\
- Next ? (REG_NODE_NUM(Next)) : 0 ); \
- }});
-
-
-
-
-
-#define JOIN_EXACT(scan,min,flags) \
- if (PL_regkind[OP(scan)] == EXACT) \
- join_exact(pRExC_state,(scan),(min),(flags),NULL,depth+1)
-
-STATIC U32
-S_join_exact(pTHX_ RExC_state_t *pRExC_state, regnode *scan, I32 *min, U32 flags,regnode *val, U32 depth) {
- /* Merge several consecutive EXACTish nodes into one. */
- regnode *n = regnext(scan);
- U32 stringok = 1;
- regnode *next = scan + NODE_SZ_STR(scan);
- U32 merged = 0;
- U32 stopnow = 0;
-#ifdef DEBUGGING
- regnode *stop = scan;
- GET_RE_DEBUG_FLAGS_DECL;
-#else
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_JOIN_EXACT;
-#ifndef EXPERIMENTAL_INPLACESCAN
- PERL_UNUSED_ARG(flags);
- PERL_UNUSED_ARG(val);
-#endif
- DEBUG_PEEP("join",scan,depth);
-
- /* Skip NOTHING, merge EXACT*. */
- while (n &&
- ( PL_regkind[OP(n)] == NOTHING ||
- (stringok && (OP(n) == OP(scan))))
- && NEXT_OFF(n)
- && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) {
-
- if (OP(n) == TAIL || n > next)
- stringok = 0;
- if (PL_regkind[OP(n)] == NOTHING) {
- DEBUG_PEEP("skip:",n,depth);
- NEXT_OFF(scan) += NEXT_OFF(n);
- next = n + NODE_STEP_REGNODE;
-#ifdef DEBUGGING
- if (stringok)
- stop = n;
-#endif
- n = regnext(n);
- }
- else if (stringok) {
- const unsigned int oldl = STR_LEN(scan);
- regnode * const nnext = regnext(n);
-
- DEBUG_PEEP("merg",n,depth);
-
- merged++;
- if (oldl + STR_LEN(n) > U8_MAX)
- break;
- NEXT_OFF(scan) += NEXT_OFF(n);
- STR_LEN(scan) += STR_LEN(n);
- next = n + NODE_SZ_STR(n);
- /* Now we can overwrite *n : */
- Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char);
-#ifdef DEBUGGING
- stop = next - 1;
-#endif
- n = nnext;
- if (stopnow) break;
- }
-
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (flags && !NEXT_OFF(n)) {
- DEBUG_PEEP("atch", val, depth);
- if (reg_off_by_arg[OP(n)]) {
- ARG_SET(n, val - n);
- }
- else {
- NEXT_OFF(n) = val - n;
- }
- stopnow = 1;
- }
-#endif
- }
-
- if (UTF && ( OP(scan) == EXACTF ) && ( STR_LEN(scan) >= 6 ) ) {
- /*
- Two problematic code points in Unicode casefolding of EXACT nodes:
-
- U+0390 - GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS
- U+03B0 - GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS
-
- which casefold to
-
- Unicode UTF-8
-
- U+03B9 U+0308 U+0301 0xCE 0xB9 0xCC 0x88 0xCC 0x81
- U+03C5 U+0308 U+0301 0xCF 0x85 0xCC 0x88 0xCC 0x81
-
- This means that in case-insensitive matching (or "loose matching",
- as Unicode calls it), an EXACTF of length six (the UTF-8 encoded byte
- length of the above casefolded versions) can match a target string
- of length two (the byte length of UTF-8 encoded U+0390 or U+03B0).
- This would rather mess up the minimum length computation.
-
- What we'll do is to look for the tail four bytes, and then peek
- at the preceding two bytes to see whether we need to decrease
- the minimum length by four (six minus two).
-
- Thanks to the design of UTF-8, there cannot be false matches:
- A sequence of valid UTF-8 bytes cannot be a subsequence of
- another valid sequence of UTF-8 bytes.
-
- */
- char * const s0 = STRING(scan), *s, *t;
- char * const s1 = s0 + STR_LEN(scan) - 1;
- char * const s2 = s1 - 4;
-#ifdef EBCDIC /* RD tunifold greek 0390 and 03B0 */
- const char t0[] = "\xaf\x49\xaf\x42";
-#else
- const char t0[] = "\xcc\x88\xcc\x81";
-#endif
- const char * const t1 = t0 + 3;
-
- for (s = s0 + 2;
- s < s2 && (t = ninstr(s, s1, t0, t1));
- s = t + 4) {
-#ifdef EBCDIC
- if (((U8)t[-1] == 0x68 && (U8)t[-2] == 0xB4) ||
- ((U8)t[-1] == 0x46 && (U8)t[-2] == 0xB5))
-#else
- if (((U8)t[-1] == 0xB9 && (U8)t[-2] == 0xCE) ||
- ((U8)t[-1] == 0x85 && (U8)t[-2] == 0xCF))
-#endif
- *min -= 4;
- }
- }
-
-#ifdef DEBUGGING
- /* Allow dumping */
- n = scan + NODE_SZ_STR(scan);
- while (n <= stop) {
- if (PL_regkind[OP(n)] != NOTHING || OP(n) == NOTHING) {
- OP(n) = OPTIMIZED;
- NEXT_OFF(n) = 0;
- }
- n++;
- }
-#endif
- DEBUG_OPTIMISE_r(if (merged){DEBUG_PEEP("finl",scan,depth)});
- return stopnow;
-}
-
-/* REx optimizer. Converts nodes into quickier variants "in place".
- Finds fixed substrings. */
-
-/* Stops at toplevel WHILEM as well as at "last". At end *scanp is set
- to the position after last scanned or to NULL. */
-
-#define INIT_AND_WITHP \
- assert(!and_withp); \
- Newx(and_withp,1,struct regnode_charclass_class); \
- SAVEFREEPV(and_withp)
-
-/* this is a chain of data about sub patterns we are processing that
- need to be handled seperately/specially in study_chunk. Its so
- we can simulate recursion without losing state. */
-struct scan_frame;
-typedef struct scan_frame {
- regnode *last; /* last node to process in this frame */
- regnode *next; /* next node to process when last is reached */
- struct scan_frame *prev; /*previous frame*/
- I32 stop; /* what stopparen do we use */
-} scan_frame;
-
-
-#define SCAN_COMMIT(s, data, m) scan_commit(s, data, m, is_inf)
-
-#define CASE_SYNST_FNC(nAmE) \
-case nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break; \
-case N ## nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break
-
-
-
-STATIC I32
-S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp,
- I32 *minlenp, I32 *deltap,
- regnode *last,
- scan_data_t *data,
- I32 stopparen,
- U8* recursed,
- struct regnode_charclass_class *and_withp,
- U32 flags, U32 depth)
- /* scanp: Start here (read-write). */
- /* deltap: Write maxlen-minlen here. */
- /* last: Stop before this one. */
- /* data: string data about the pattern */
- /* stopparen: treat close N as END */
- /* recursed: which subroutines have we recursed into */
- /* and_withp: Valid if flags & SCF_DO_STCLASS_OR */
-{
- dVAR;
- I32 min = 0, pars = 0, code;
- regnode *scan = *scanp, *next;
- I32 delta = 0;
- int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF);
- int is_inf_internal = 0; /* The studied chunk is infinite */
- I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0;
- scan_data_t data_fake;
- SV *re_trie_maxbuff = NULL;
- regnode *first_non_open = scan;
- I32 stopmin = I32_MAX;
- scan_frame *frame = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_STUDY_CHUNK;
-
-#ifdef DEBUGGING
- StructCopy(&zero_scan_data, &data_fake, scan_data_t);
-#endif
-
- if ( depth == 0 ) {
- while (first_non_open && OP(first_non_open) == OPEN)
- first_non_open=regnext(first_non_open);
- }
-
-
- fake_study_recurse:
- while ( scan && OP(scan) != END && scan < last ){
- /* Peephole optimizer: */
- DEBUG_STUDYDATA("Peep:", data,depth);
- DEBUG_PEEP("Peep",scan,depth);
- JOIN_EXACT(scan,&min,0);
-
- /* Follow the next-chain of the current node and optimize
- away all the NOTHINGs from it. */
- if (OP(scan) != CURLYX) {
- const int max = (reg_off_by_arg[OP(scan)]
- ? I32_MAX
- /* I32 may be smaller than U16 on CRAYs! */
- : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX));
- int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan));
- int noff;
- regnode *n = scan;
-
- /* Skip NOTHING and LONGJMP. */
- while ((n = regnext(n))
- && ((PL_regkind[OP(n)] == NOTHING && (noff = NEXT_OFF(n)))
- || ((OP(n) == LONGJMP) && (noff = ARG(n))))
- && off + noff < max)
- off += noff;
- if (reg_off_by_arg[OP(scan)])
- ARG(scan) = off;
- else
- NEXT_OFF(scan) = off;
- }
-
-
-
- /* The principal pseudo-switch. Cannot be a switch, since we
- look into several different things. */
- if (OP(scan) == BRANCH || OP(scan) == BRANCHJ
- || OP(scan) == IFTHEN) {
- next = regnext(scan);
- code = OP(scan);
- /* demq: the op(next)==code check is to see if we have "branch-branch" AFAICT */
-
- if (OP(next) == code || code == IFTHEN) {
- /* NOTE - There is similar code to this block below for handling
- TRIE nodes on a re-study. If you change stuff here check there
- too. */
- I32 max1 = 0, min1 = I32_MAX, num = 0;
- struct regnode_charclass_class accum;
- regnode * const startbranch=scan;
-
- if (flags & SCF_DO_SUBSTR)
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- while (OP(scan) == code) {
- I32 deltanext, minnext, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- num++;
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
-
- data_fake.pos_delta = delta;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- if (code != BRANCH)
- scan = NEXTOPER(scan);
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- /* we suppose the run is continuous, last=next...*/
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- next, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- if (min1 > minnext)
- min1 = minnext;
- if (max1 < minnext + deltanext)
- max1 = minnext + deltanext;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
- scan = next;
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > minnext)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- if (code == IFTHEN && num < 2) /* Empty ELSE branch */
- min1 = 0;
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
-
- if (PERL_ENABLE_TRIE_OPTIMISATION && OP( startbranch ) == BRANCH ) {
- /* demq.
-
- Assuming this was/is a branch we are dealing with: 'scan' now
- points at the item that follows the branch sequence, whatever
- it is. We now start at the beginning of the sequence and look
- for subsequences of
-
- BRANCH->EXACT=>x1
- BRANCH->EXACT=>x2
- tail
-
- which would be constructed from a pattern like /A|LIST|OF|WORDS/
-
- If we can find such a subseqence we need to turn the first
- element into a trie and then add the subsequent branch exact
- strings to the trie.
-
- We have two cases
-
- 1. patterns where the whole set of branch can be converted.
-
- 2. patterns where only a subset can be converted.
-
- In case 1 we can replace the whole set with a single regop
- for the trie. In case 2 we need to keep the start and end
- branchs so
-
- 'BRANCH EXACT; BRANCH EXACT; BRANCH X'
- becomes BRANCH TRIE; BRANCH X;
-
- There is an additional case, that being where there is a
- common prefix, which gets split out into an EXACT like node
- preceding the TRIE node.
-
- If x(1..n)==tail then we can do a simple trie, if not we make
- a "jump" trie, such that when we match the appropriate word
- we "jump" to the appopriate tail node. Essentailly we turn
- a nested if into a case structure of sorts.
-
- */
-
- int made=0;
- if (!re_trie_maxbuff) {
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff))
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- if ( SvIV(re_trie_maxbuff)>=0 ) {
- regnode *cur;
- regnode *first = (regnode *)NULL;
- regnode *last = (regnode *)NULL;
- regnode *tail = scan;
- U8 optype = 0;
- U32 count=0;
-
-#ifdef DEBUGGING
- SV * const mysv = sv_newmortal(); /* for dumping */
-#endif
- /* var tail is used because there may be a TAIL
- regop in the way. Ie, the exacts will point to the
- thing following the TAIL, but the last branch will
- point at the TAIL. So we advance tail. If we
- have nested (?:) we may have to move through several
- tails.
- */
-
- while ( OP( tail ) == TAIL ) {
- /* this is the TAIL generated by (?:) */
- tail = regnext( tail );
- }
-
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, tail );
- PerlIO_printf( Perl_debug_log, "%*s%s%s\n",
- (int)depth * 2 + 2, "",
- "Looking for TRIE'able sequences. Tail node is: ",
- SvPV_nolen_const( mysv )
- );
- });
-
- /*
-
- step through the branches, cur represents each
- branch, noper is the first thing to be matched
- as part of that branch and noper_next is the
- regnext() of that node. if noper is an EXACT
- and noper_next is the same as scan (our current
- position in the regex) then the EXACT branch is
- a possible optimization target. Once we have
- two or more consequetive such branches we can
- create a trie of the EXACT's contents and stich
- it in place. If the sequence represents all of
- the branches we eliminate the whole thing and
- replace it with a single TRIE. If it is a
- subsequence then we need to stitch it in. This
- means the first branch has to remain, and needs
- to be repointed at the item on the branch chain
- following the last branch optimized. This could
- be either a BRANCH, in which case the
- subsequence is internal, or it could be the
- item following the branch sequence in which
- case the subsequence is at the end.
-
- */
-
- /* dont use tail as the end marker for this traverse */
- for ( cur = startbranch ; cur != scan ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
-#if defined(DEBUGGING) || defined(NOJUMPTRIE)
- regnode * const noper_next = regnext( noper );
-#endif
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log, "%*s- %s (%d)",
- (int)depth * 2 + 2,"", SvPV_nolen_const( mysv ), REG_NODE_NUM(cur) );
-
- regprop(RExC_rx, mysv, noper);
- PerlIO_printf( Perl_debug_log, " -> %s",
- SvPV_nolen_const(mysv));
-
- if ( noper_next ) {
- regprop(RExC_rx, mysv, noper_next );
- PerlIO_printf( Perl_debug_log,"\t=> %s\t",
- SvPV_nolen_const(mysv));
- }
- PerlIO_printf( Perl_debug_log, "(First==%d,Last==%d,Cur==%d)\n",
- REG_NODE_NUM(first), REG_NODE_NUM(last), REG_NODE_NUM(cur) );
- });
- if ( (((first && optype!=NOTHING) ? OP( noper ) == optype
- : PL_regkind[ OP( noper ) ] == EXACT )
- || OP(noper) == NOTHING )
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- && count < U16_MAX)
- {
- count++;
- if ( !first || optype == NOTHING ) {
- if (!first) first = cur;
- optype = OP( noper );
- } else {
- last = cur;
- }
- } else {
-/*
- Currently we do not believe that the trie logic can
- handle case insensitive matching properly when the
- pattern is not unicode (thus forcing unicode semantics).
-
- If/when this is fixed the following define can be swapped
- in below to fully enable trie logic.
-
-#define TRIE_TYPE_IS_SAFE 1
-
-*/
-#define TRIE_TYPE_IS_SAFE (UTF || optype==EXACT)
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- make_trie( pRExC_state,
- startbranch, first, cur, tail, count,
- optype, depth+1 );
- }
- if ( PL_regkind[ OP( noper ) ] == EXACT
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- ){
- count = 1;
- first = cur;
- optype = OP( noper );
- } else {
- count = 0;
- first = NULL;
- optype = 0;
- }
- last = NULL;
- }
- }
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log,
- "%*s- %s (%d) <SCAN FINISHED>\n", (int)depth * 2 + 2,
- "", SvPV_nolen_const( mysv ),REG_NODE_NUM(cur));
-
- });
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- made= make_trie( pRExC_state, startbranch, first, scan, tail, count, optype, depth+1 );
-#ifdef TRIE_STUDY_OPT
- if ( ((made == MADE_EXACT_TRIE &&
- startbranch == first)
- || ( first_non_open == first )) &&
- depth==0 ) {
- flags |= SCF_TRIE_RESTUDY;
- if ( startbranch == first
- && scan == tail )
- {
- RExC_seen &=~REG_TOP_LEVEL_BRANCHES;
- }
- }
-#endif
- }
- }
-
- } /* do trie */
-
- }
- else if ( code == BRANCHJ ) { /* single branch is optimized. */
- scan = NEXTOPER(NEXTOPER(scan));
- } else /* single branch is optimized. */
- scan = NEXTOPER(scan);
- continue;
- } else if (OP(scan) == SUSPEND || OP(scan) == GOSUB || OP(scan) == GOSTART) {
- scan_frame *newframe = NULL;
- I32 paren;
- regnode *start;
- regnode *end;
-
- if (OP(scan) != SUSPEND) {
- /* set the pointer */
- if (OP(scan) == GOSUB) {
- paren = ARG(scan);
- RExC_recurse[ARG2L(scan)] = scan;
- start = RExC_open_parens[paren-1];
- end = RExC_close_parens[paren-1];
- } else {
- paren = 0;
- start = RExC_rxi->program + 1;
- end = RExC_opend;
- }
- if (!recursed) {
- Newxz(recursed, (((RExC_npar)>>3) +1), U8);
- SAVEFREEPV(recursed);
- }
- if (!PAREN_TEST(recursed,paren+1)) {
- PAREN_SET(recursed,paren+1);
- Newx(newframe,1,scan_frame);
- } else {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- } else {
- Newx(newframe,1,scan_frame);
- paren = stopparen;
- start = scan+2;
- end = regnext(scan);
- }
- if (newframe) {
- assert(start);
- assert(end);
- SAVEFREEPV(newframe);
- newframe->next = regnext(scan);
- newframe->last = last;
- newframe->stop = stopparen;
- newframe->prev = frame;
-
- frame = newframe;
- scan = start;
- stopparen = paren;
- last = end;
-
- continue;
- }
- }
- else if (OP(scan) == EXACT) {
- I32 l = STR_LEN(scan);
- UV uc;
- if (UTF) {
- const U8 * const s = (U8*)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- } else {
- uc = *((U8*)STRING(scan));
- }
- min += l;
- if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */
- /* The code below prefers earlier match for fixed
- offset, later match for variable offset. */
- if (data->last_end == -1) { /* Update the start info. */
- data->last_start_min = data->pos_min;
- data->last_start_max = is_inf
- ? I32_MAX : data->pos_min + data->pos_delta;
- }
- sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan));
- if (UTF)
- SvUTF8_on(data->last_found);
- {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += utf8_length((U8*)STRING(scan),
- (U8*)STRING(scan)+STR_LEN(scan));
- }
- data->last_end = data->pos_min + l;
- data->pos_min += l; /* As in the first entry. */
- data->flags &= ~SF_BEFORE_EOL;
- }
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && (!(data->start_class->flags & ANYOF_FOLD)
- || !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- )
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- if (uc < 0x100)
- data->start_class->flags &= ~ANYOF_UNICODE_ALL;
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- /* false positive possible if the class is case-folded */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- else
- data->start_class->flags |= ANYOF_UNICODE_ALL;
- data->start_class->flags &= ~ANYOF_EOS;
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (PL_regkind[OP(scan)] == EXACT) { /* But OP != EXACT! */
- I32 l = STR_LEN(scan);
- UV uc = *((U8*)STRING(scan));
-
- /* Search for fixed substrings supports EXACT only. */
- if (flags & SCF_DO_SUBSTR) {
- assert(data);
- SCAN_COMMIT(pRExC_state, data, minlenp);
- }
- if (UTF) {
- const U8 * const s = (U8 *)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- }
- min += l;
- if (flags & SCF_DO_SUBSTR)
- data->pos_min += l;
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat) {
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- data->start_class->flags |= ANYOF_FOLD;
- if (OP(scan) == EXACTFL)
- data->start_class->flags |= ANYOF_LOCALE;
- }
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- if (data->start_class->flags & ANYOF_FOLD) {
- /* false positive possible if the class is case-folded.
- Assume that the locale settings are the same... */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- }
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (strchr((const char*)PL_varies,OP(scan))) {
- I32 mincount, maxcount, minnext, deltanext, fl = 0;
- I32 f = flags, pos_before = 0;
- regnode * const oscan = scan;
- struct regnode_charclass_class this_class;
- struct regnode_charclass_class *oclass = NULL;
- I32 next_is_eval = 0;
-
- switch (PL_regkind[OP(scan)]) {
- case WHILEM: /* End of (?:...)* . */
- scan = NEXTOPER(scan);
- goto finish;
- case PLUS:
- if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) {
- next = NEXTOPER(scan);
- if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) {
- mincount = 1;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- }
- if (flags & SCF_DO_SUBSTR)
- data->pos_min++;
- min++;
- /* Fall through. */
- case STAR:
- if (flags & SCF_DO_STCLASS) {
- mincount = 0;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- is_inf = is_inf_internal = 1;
- scan = regnext(scan);
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot extend fixed substrings */
- data->longest = &(data->longest_float);
- }
- goto optimize_curly_tail;
- case CURLY:
- if (stopparen>0 && (OP(scan)==CURLYN || OP(scan)==CURLYM)
- && (scan->flags == stopparen))
- {
- mincount = 1;
- maxcount = 1;
- } else {
- mincount = ARG1(scan);
- maxcount = ARG2(scan);
- }
- next = regnext(scan);
- if (OP(scan) == CURLYX) {
- I32 lp = (data ? *(data->last_closep) : 0);
- scan->flags = ((lp <= (I32)U8_MAX) ? (U8)lp : U8_MAX);
- }
- scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- next_is_eval = (OP(scan) == EVAL);
- do_curly:
- if (flags & SCF_DO_SUBSTR) {
- if (mincount == 0) SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot extend fixed substrings */
- pos_before = data->pos_min;
- }
- if (data) {
- fl = data->flags;
- data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL);
- if (is_inf)
- data->flags |= SF_IS_INF;
- }
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- oclass = data->start_class;
- data->start_class = &this_class;
- f |= SCF_DO_STCLASS_AND;
- f &= ~SCF_DO_STCLASS_OR;
- }
- /* These are the cases when once a subexpression
- fails at a particular position, it cannot succeed
- even after backtracking at the enclosing scope.
-
- XXXX what if minimal match and we are at the
- initial run of {n,m}? */
- if ((mincount != maxcount - 1) && (maxcount != REG_INFTY))
- f &= ~SCF_WHILEM_VISITED_POS;
-
- /* This will finish on WHILEM, setting scan, or on NULL: */
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- last, data, stopparen, recursed, NULL,
- (mincount == 0
- ? (f & ~SCF_DO_SUBSTR) : f),depth+1);
-
- if (flags & SCF_DO_STCLASS)
- data->start_class = oclass;
- if (mincount == 0 || minnext == 0) {
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&this_class, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- } else { /* Non-zero len */
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- cl_and(data->start_class, and_withp);
- }
- else if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class, &this_class);
- flags &= ~SCF_DO_STCLASS;
- }
- if (!scan) /* It was not CURLYX, but CURLY. */
- scan = next;
- if ( /* ? quantifier ok, except for (?{ ... }) */
- (next_is_eval || !(mincount == 0 && maxcount == 1))
- && (minnext == 0) && (deltanext == 0)
- && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR))
- && maxcount <= REG_INFTY/3) /* Complement check for big count */
- {
- ckWARNreg(RExC_parse,
- "Quantifier unexpected on zero-length expression");
- }
-
- min += minnext * mincount;
- is_inf_internal |= ((maxcount == REG_INFTY
- && (minnext + deltanext) > 0)
- || deltanext == I32_MAX);
- is_inf |= is_inf_internal;
- delta += (minnext + deltanext) * maxcount - minnext * mincount;
-
- /* Try powerful optimization CURLYX => CURLYN. */
- if ( OP(oscan) == CURLYX && data
- && data->flags & SF_IN_PAR
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext && minnext == 1 ) {
- /* Try to optimize to CURLYN. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS;
- regnode * const nxt1 = nxt;
-#ifdef DEBUGGING
- regnode *nxt2;
-#endif
-
- /* Skip open. */
- nxt = regnext(nxt);
- if (!strchr((const char*)PL_simple,OP(nxt))
- && !(PL_regkind[OP(nxt)] == EXACT
- && STR_LEN(nxt) == 1))
- goto nogo;
-#ifdef DEBUGGING
- nxt2 = nxt;
-#endif
- nxt = regnext(nxt);
- if (OP(nxt) != CLOSE)
- goto nogo;
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt+2; /*close->while*/
- }
- /* Now we know that nxt2 is the only contents: */
- oscan->flags = (U8)ARG(nxt);
- OP(oscan) = CURLYN;
- OP(nxt1) = NOTHING; /* was OPEN. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */
-#endif
- }
- nogo:
-
- /* Try optimization CURLYX => CURLYM. */
- if ( OP(oscan) == CURLYX && data
- && !(data->flags & SF_HAS_PAR)
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext /* atom is fixed width */
- && minnext != 0 /* CURLYM can't handle zero width */
- ) {
- /* XXXX How to optimize if data == 0? */
- /* Optimize to a simpler form. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */
- regnode *nxt2;
-
- OP(oscan) = CURLYM;
- while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/
- && (OP(nxt2) != WHILEM))
- nxt = nxt2;
- OP(nxt2) = SUCCEED; /* Whas WHILEM */
- /* Need to optimize away parenths. */
- if (data->flags & SF_IN_PAR) {
- /* Set the parenth number. */
- regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/
-
- if (OP(nxt) != CLOSE)
- FAIL("Panic opt close");
- oscan->flags = (U8)ARG(nxt);
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt2+1; /*close->NOTHING*/
- }
- OP(nxt1) = OPTIMIZED; /* was OPEN. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */
-#endif
-#if 0
- while ( nxt1 && (OP(nxt1) != WHILEM)) {
- regnode *nnxt = regnext(nxt1);
-
- if (nnxt == nxt) {
- if (reg_off_by_arg[OP(nxt1)])
- ARG_SET(nxt1, nxt2 - nxt1);
- else if (nxt2 - nxt1 < U16_MAX)
- NEXT_OFF(nxt1) = nxt2 - nxt1;
- else
- OP(nxt) = NOTHING; /* Cannot beautify */
- }
- nxt1 = nnxt;
- }
-#endif
- /* Optimize again: */
- study_chunk(pRExC_state, &nxt1, minlenp, &deltanext, nxt,
- NULL, stopparen, recursed, NULL, 0,depth+1);
- }
- else
- oscan->flags = 0;
- }
- else if ((OP(oscan) == CURLYX)
- && (flags & SCF_WHILEM_VISITED_POS)
- /* See the comment on a similar expression above.
- However, this time it not a subexpression
- we care about, but the expression itself. */
- && (maxcount == REG_INFTY)
- && data && ++data->whilem_c < 16) {
- /* This stays as CURLYX, we can put the count/of pair. */
- /* Find WHILEM (as in regexec.c) */
- regnode *nxt = oscan + NEXT_OFF(oscan);
-
- if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */
- nxt += ARG(nxt);
- PREVOPER(nxt)->flags = (U8)(data->whilem_c
- | (RExC_whilem_seen << 4)); /* On WHILEM */
- }
- if (data && fl & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (flags & SCF_DO_SUBSTR) {
- SV *last_str = NULL;
- int counted = mincount != 0;
-
- if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */
-#if defined(SPARC64_GCC_WORKAROUND)
- I32 b = 0;
- STRLEN l = 0;
- const char *s = NULL;
- I32 old = 0;
-
- if (pos_before >= data->last_start_min)
- b = pos_before;
- else
- b = data->last_start_min;
-
- l = 0;
- s = SvPV_const(data->last_found, l);
- old = b - data->last_start_min;
-
-#else
- I32 b = pos_before >= data->last_start_min
- ? pos_before : data->last_start_min;
- STRLEN l;
- const char * const s = SvPV_const(data->last_found, l);
- I32 old = b - data->last_start_min;
-#endif
-
- if (UTF)
- old = utf8_hop((U8*)s, old) - (U8*)s;
-
- l -= old;
- /* Get the added string: */
- last_str = newSVpvn_utf8(s + old, l, UTF);
- if (deltanext == 0 && pos_before == b) {
- /* What was added is a constant string */
- if (mincount > 1) {
- SvGROW(last_str, (mincount * l) + 1);
- repeatcpy(SvPVX(last_str) + l,
- SvPVX_const(last_str), l, mincount - 1);
- SvCUR_set(last_str, SvCUR(last_str) * mincount);
- /* Add additional parts. */
- SvCUR_set(data->last_found,
- SvCUR(data->last_found) - l);
- sv_catsv(data->last_found, last_str);
- {
- SV * sv = data->last_found;
- MAGIC *mg =
- SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += CHR_SVLEN(last_str) - l;
- }
- data->last_end += l * (mincount - 1);
- }
- } else {
- /* start offset must point into the last copy */
- data->last_start_min += minnext * (mincount - 1);
- data->last_start_max += is_inf ? I32_MAX
- : (maxcount - 1) * (minnext + data->pos_delta);
- }
- }
- /* It is counted once already... */
- data->pos_min += minnext * (mincount - counted);
- data->pos_delta += - counted * deltanext +
- (minnext + deltanext) * maxcount - minnext * mincount;
- if (mincount != maxcount) {
- /* Cannot extend fixed substrings found inside
- the group. */
- SCAN_COMMIT(pRExC_state,data,minlenp);
- if (mincount && last_str) {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
-
- if (mg)
- mg->mg_len = -1;
- sv_setsv(sv, last_str);
- data->last_end = data->pos_min;
- data->last_start_min =
- data->pos_min - CHR_SVLEN(last_str);
- data->last_start_max = is_inf
- ? I32_MAX
- : data->pos_min + data->pos_delta
- - CHR_SVLEN(last_str);
- }
- data->longest = &(data->longest_float);
- }
- SvREFCNT_dec(last_str);
- }
- if (data && (fl & SF_HAS_EVAL))
- data->flags |= SF_HAS_EVAL;
- optimize_curly_tail:
- if (OP(oscan) != CURLYX) {
- while (PL_regkind[OP(next = regnext(oscan))] == NOTHING
- && NEXT_OFF(next))
- NEXT_OFF(oscan) += NEXT_OFF(next);
- }
- continue;
- default: /* REF and CLUMP only? */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR)
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- break;
- }
- }
- else if (OP(scan) == LNBREAK) {
- if (flags & SCF_DO_STCLASS) {
- int value = 0;
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
- if (flags & SCF_DO_STCLASS_AND) {
- for (value = 0; value < 256; value++)
- if (!is_VERTWS_cp(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- for (value = 0; value < 256; value++)
- if (is_VERTWS_cp(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- min += 1;
- delta += 1;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += 1;
- data->longest = &(data->longest_float);
- }
-
- }
- else if (OP(scan) == FOLDCHAR) {
- int d = ARG(scan)==0xDF ? 1 : 2;
- flags &= ~SCF_DO_STCLASS;
- min += 1;
- delta += d;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += d;
- data->longest = &(data->longest_float);
- }
- }
- else if (strchr((const char*)PL_simple,OP(scan))) {
- int value = 0;
-
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->pos_min++;
- }
- min++;
- if (flags & SCF_DO_STCLASS) {
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
-
- /* Some of the logic below assumes that switching
- locale on will only add false positives. */
- switch (PL_regkind[OP(scan)]) {
- case SANY:
- default:
- do_default:
- /* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- break;
- case REG_ANY:
- if (OP(scan) == SANY)
- goto do_default;
- if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */
- value = (ANYOF_BITMAP_TEST(data->start_class,'\n')
- || (data->start_class->flags & ANYOF_CLASS));
- cl_anything(pRExC_state, data->start_class);
- }
- if (flags & SCF_DO_STCLASS_AND || !value)
- ANYOF_BITMAP_CLEAR(data->start_class,'\n');
- break;
- case ANYOF:
- if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class,
- (struct regnode_charclass_class*)scan);
- else
- cl_or(pRExC_state, data->start_class,
- (struct regnode_charclass_class*)scan);
- break;
- case ALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case ALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- }
- else {
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- data->start_class->flags |= ANYOF_LOCALE;
- }
- break;
- case NALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- }
- break;
- case SPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- else {
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case SPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- }
- break;
- case NSPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- else {
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NSPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- }
- break;
- case DIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT);
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NDIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT);
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- CASE_SYNST_FNC(VERTWS);
- CASE_SYNST_FNC(HORIZWS);
-
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (PL_regkind[OP(scan)] == EOL && flags & SCF_DO_SUBSTR) {
- data->flags |= (OP(scan) == MEOL
- ? SF_BEFORE_MEOL
- : SF_BEFORE_SEOL);
- }
- else if ( PL_regkind[OP(scan)] == BRANCHJ
- /* Lookbehind, or need to calculate parens/evals/stclass: */
- && (scan->flags || data || (flags & SCF_DO_STCLASS))
- && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) {
- if ( !PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- || OP(scan) == UNLESSM )
- {
- /* Negative Lookahead/lookbehind
- In this case we can't do fixed string optimisation.
- */
-
- I32 deltanext, minnext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
- minnext = study_chunk(pRExC_state, &nscan, minlenp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f, depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (minnext > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)minnext;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (f & SCF_DO_STCLASS_AND) {
- if (flags & SCF_DO_STCLASS_OR) {
- /* OR before, AND after: ideally we would recurse with
- * data_fake to get the AND applied by study of the
- * remainder of the pattern, and then derecurse;
- * *** HACK *** for now just treat as "no information".
- * See [perl #56690].
- */
- cl_init(pRExC_state, data->start_class);
- } else {
- /* AND before and after: combine and continue */
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- }
-#if PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- else {
- /* Positive Lookahead/lookbehind
- In this case we can do fixed string optimisation,
- but we must be careful about it. Note in the case of
- lookbehind the positions will be offset by the minimum
- length of the pattern, something we won't know about
- until after the recurse.
- */
- I32 deltanext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
- /* We use SAVEFREEPV so that when the full compile
- is finished perl will clean up the allocated
- minlens when its all done. This was we don't
- have to worry about freeing them when we know
- they wont be used, which would be a pain.
- */
- I32 *minnextp;
- Newx( minnextp, 1, I32 );
- SAVEFREEPV(minnextp);
-
- if (data) {
- StructCopy(data, &data_fake, scan_data_t);
- if ((flags & SCF_DO_SUBSTR) && data->last_found) {
- f |= SCF_DO_SUBSTR;
- if (scan->flags)
- SCAN_COMMIT(pRExC_state, &data_fake,minlenp);
- data_fake.last_found=newSVsv(data->last_found);
- }
- }
- else
- data_fake.last_closep = &fake;
- data_fake.flags = 0;
- data_fake.pos_delta = delta;
- if (is_inf)
- data_fake.flags |= SF_IS_INF;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
-
- *minnextp = study_chunk(pRExC_state, &nscan, minnextp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f,depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (*minnextp > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)*minnextp;
- }
-
- *minnextp += min;
-
- if (f & SCF_DO_STCLASS_AND) {
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- if ((flags & SCF_DO_SUBSTR) && data_fake.last_found) {
- if (RExC_rx->minlen<*minnextp)
- RExC_rx->minlen=*minnextp;
- SCAN_COMMIT(pRExC_state, &data_fake, minnextp);
- SvREFCNT_dec(data_fake.last_found);
-
- if ( data_fake.minlen_fixed != minlenp )
- {
- data->offset_fixed= data_fake.offset_fixed;
- data->minlen_fixed= data_fake.minlen_fixed;
- data->lookbehind_fixed+= scan->flags;
- }
- if ( data_fake.minlen_float != minlenp )
- {
- data->minlen_float= data_fake.minlen_float;
- data->offset_float_min=data_fake.offset_float_min;
- data->offset_float_max=data_fake.offset_float_max;
- data->lookbehind_float+= scan->flags;
- }
- }
- }
-
-
- }
-#endif
- }
- else if (OP(scan) == OPEN) {
- if (stopparen != (I32)ARG(scan))
- pars++;
- }
- else if (OP(scan) == CLOSE) {
- if (stopparen == (I32)ARG(scan)) {
- break;
- }
- if ((I32)ARG(scan) == is_par) {
- next = regnext(scan);
-
- if ( next && (OP(next) != WHILEM) && next < last)
- is_par = 0; /* Disable optimization */
- }
- if (data)
- *(data->last_closep) = ARG(scan);
- }
- else if (OP(scan) == EVAL) {
- if (data)
- data->flags |= SF_HAS_EVAL;
- }
- else if ( PL_regkind[OP(scan)] == ENDLIKE ) {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- flags &= ~SCF_DO_SUBSTR;
- }
- if (data && OP(scan)==ACCEPT) {
- data->flags |= SCF_SEEN_ACCEPT;
- if (stopmin > min)
- stopmin = min;
- }
- }
- else if (OP(scan) == LOGICAL && scan->flags == 2) /* Embedded follows */
- {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- else if (OP(scan) == GPOS) {
- if (!(RExC_rx->extflags & RXf_GPOS_FLOAT) &&
- !(delta || is_inf || (data && data->pos_delta)))
- {
- if (!(RExC_rx->extflags & RXf_ANCH) && (flags & SCF_DO_SUBSTR))
- RExC_rx->extflags |= RXf_ANCH_GPOS;
- if (RExC_rx->gofs < (U32)min)
- RExC_rx->gofs = min;
- } else {
- RExC_rx->extflags |= RXf_GPOS_FLOAT;
- RExC_rx->gofs = 0;
- }
- }
-#ifdef TRIE_STUDY_OPT
-#ifdef FULL_TRIE_STUDY
- else if (PL_regkind[OP(scan)] == TRIE) {
- /* NOTE - There is similar code to this block above for handling
- BRANCH nodes on the initial study. If you change stuff here
- check there too. */
- regnode *trie_node= scan;
- regnode *tail= regnext(scan);
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- I32 max1 = 0, min1 = I32_MAX;
- struct regnode_charclass_class accum;
-
- if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */
- SCAN_COMMIT(pRExC_state, data,minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- if (!trie->jump) {
- min1= trie->minlen;
- max1= trie->maxlen;
- } else {
- const regnode *nextbranch= NULL;
- U32 word;
-
- for ( word=1 ; word <= trie->wordcount ; word++)
- {
- I32 deltanext=0, minnext=0, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- if (trie->jump[word]) {
- if (!nextbranch)
- nextbranch = trie_node + trie->jump[0];
- scan= trie_node + trie->jump[word];
- /* We go from the jump point to the branch that follows
- it. Note this means we need the vestigal unused branches
- even though they arent otherwise used.
- */
- minnext = study_chunk(pRExC_state, &scan, minlenp,
- &deltanext, (regnode *)nextbranch, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode*)nextbranch);
-
- if (min1 > (I32)(minnext + trie->minlen))
- min1 = minnext + trie->minlen;
- if (max1 < (I32)(minnext + deltanext + trie->maxlen))
- max1 = minnext + deltanext + trie->maxlen;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
-
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > min + min1)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- }
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- scan= tail;
- continue;
- }
-#else
- else if (PL_regkind[OP(scan)] == TRIE) {
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- U8*bang=NULL;
-
- min += trie->minlen;
- delta += (trie->maxlen - trie->minlen);
- flags &= ~SCF_DO_STCLASS; /* xxx */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += trie->minlen;
- data->pos_delta += (trie->maxlen - trie->minlen);
- if (trie->maxlen != trie->minlen)
- data->longest = &(data->longest_float);
- }
- if (trie->jump) /* no more substrings -- for now /grr*/
- flags &= ~SCF_DO_SUBSTR;
- }
-#endif /* old or new */
-#endif /* TRIE_STUDY_OPT */
-
- /* Else: zero-length, ignore. */
- scan = regnext(scan);
- }
- if (frame) {
- last = frame->last;
- scan = frame->next;
- stopparen = frame->stop;
- frame = frame->prev;
- goto fake_study_recurse;
- }
-
- finish:
- assert(!frame);
- DEBUG_STUDYDATA("pre-fin:",data,depth);
-
- *scanp = scan;
- *deltap = is_inf_internal ? I32_MAX : delta;
- if (flags & SCF_DO_SUBSTR && is_inf)
- data->pos_delta = I32_MAX - data->pos_min;
- if (is_par > (I32)U8_MAX)
- is_par = 0;
- if (is_par && pars==1 && data) {
- data->flags |= SF_IN_PAR;
- data->flags &= ~SF_HAS_PAR;
- }
- else if (pars && data) {
- data->flags |= SF_HAS_PAR;
- data->flags &= ~SF_IN_PAR;
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- if (flags & SCF_TRIE_RESTUDY)
- data->flags |= SCF_TRIE_RESTUDY;
-
- DEBUG_STUDYDATA("post-fin:",data,depth);
-
- return min < stopmin ? min : stopmin;
-}
-
-STATIC U32
-S_add_data(RExC_state_t *pRExC_state, U32 n, const char *s)
-{
- U32 count = RExC_rxi->data ? RExC_rxi->data->count : 0;
-
- PERL_ARGS_ASSERT_ADD_DATA;
-
- Renewc(RExC_rxi->data,
- sizeof(*RExC_rxi->data) + sizeof(void*) * (count + n - 1),
- char, struct reg_data);
- if(count)
- Renew(RExC_rxi->data->what, count + n, U8);
- else
- Newx(RExC_rxi->data->what, n, U8);
- RExC_rxi->data->count = count + n;
- Copy(s, RExC_rxi->data->what + count, n, U8);
- return count;
-}
-
-/*XXX: todo make this not included in a non debugging perl */
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_reginitcolors(pTHX)
-{
- dVAR;
- const char * const s = PerlEnv_getenv("PERL_RE_COLORS");
- if (s) {
- char *t = savepv(s);
- int i = 0;
- PL_colors[0] = t;
- while (++i < 6) {
- t = strchr(t, '\t');
- if (t) {
- *t = '\0';
- PL_colors[i] = ++t;
- }
- else
- PL_colors[i] = t = (char *)"";
- }
- } else {
- int i = 0;
- while (i < 6)
- PL_colors[i++] = (char *)"";
- }
- PL_colorset = 1;
-}
-#endif
-
-
-#ifdef TRIE_STUDY_OPT
-#define CHECK_RESTUDY_GOTO \
- if ( \
- (data.flags & SCF_TRIE_RESTUDY) \
- && ! restudied++ \
- ) goto reStudy
-#else
-#define CHECK_RESTUDY_GOTO
-#endif
-
-/*
- - pregcomp - compile a regular expression into internal code
- *
- * We can't allocate space until we know how big the compiled form will be,
- * but we can't compile it (and thus know how big it is) until we've got a
- * place to put the code. So we cheat: we compile it twice, once with code
- * generation turned off and size counting turned on, and once "for real".
- * This also means that we don't allocate space until we are sure that the
- * thing really will compile successfully, and we never have to move the
- * code and thus invalidate pointers into it. (Note that it has to be in
- * one piece because free() must be able to free it all.) [NB: not true in perl]
- *
- * Beware that the optimization-preparation code in here knows about some
- * of the structure of the compiled regexp. [I'll say.]
- */
-
-
-
-#ifndef PERL_IN_XSUB_RE
-#define RE_ENGINE_PTR &PL_core_reg_engine
-#else
-extern const struct regexp_engine my_reg_engine;
-#define RE_ENGINE_PTR &my_reg_engine
-#endif
-
-#ifndef PERL_IN_XSUB_RE
-REGEXP *
-Perl_pregcomp(pTHX_ SV * const pattern, const U32 flags)
-{
- dVAR;
- HV * const table = GvHV(PL_hintgv);
-
- PERL_ARGS_ASSERT_PREGCOMP;
-
- /* Dispatch a request to compile a regexp to correct
- regexp engine. */
- if (table) {
- SV **ptr= hv_fetchs(table, "regcomp", FALSE);
- GET_RE_DEBUG_FLAGS_DECL;
- if (ptr && SvIOK(*ptr) && SvIV(*ptr)) {
- const regexp_engine *eng=INT2PTR(regexp_engine*,SvIV(*ptr));
- DEBUG_COMPILE_r({
- PerlIO_printf(Perl_debug_log, "Using engine %"UVxf"\n",
- SvIV(*ptr));
- });
- return CALLREGCOMP_ENG(eng, pattern, flags);
- }
- }
- return Perl_re_compile(aTHX_ pattern, flags);
-}
-#endif
-
-REGEXP *
-Perl_re_compile(pTHX_ SV * const pattern, U32 pm_flags)
-{
- dVAR;
- REGEXP *rx;
- struct regexp *r;
- register regexp_internal *ri;
- STRLEN plen;
- char *exp = SvPV(pattern, plen);
- char* xend = exp + plen;
- regnode *scan;
- I32 flags;
- I32 minlen = 0;
- I32 sawplus = 0;
- I32 sawopen = 0;
- scan_data_t data;
- RExC_state_t RExC_state;
- RExC_state_t * const pRExC_state = &RExC_state;
-#ifdef TRIE_STUDY_OPT
- int restudied= 0;
- RExC_state_t copyRExC_state;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_COMPILE;
-
- DEBUG_r(if (!PL_colorset) reginitcolors());
-
- RExC_utf8 = RExC_orig_utf8 = SvUTF8(pattern);
-
- DEBUG_COMPILE_r({
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RExC_utf8,
- dsv, exp, plen, 60);
- PerlIO_printf(Perl_debug_log, "%sCompiling REx%s %s\n",
- PL_colors[4],PL_colors[5],s);
- });
-
-redo_first_pass:
- RExC_precomp = exp;
- RExC_flags = pm_flags;
- RExC_sawback = 0;
-
- RExC_seen = 0;
- RExC_seen_zerolen = *exp == '^' ? -1 : 0;
- RExC_seen_evals = 0;
- RExC_extralen = 0;
-
- /* First pass: determine size, legality. */
- RExC_parse = exp;
- RExC_start = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_nestroot = 0;
- RExC_size = 0L;
- RExC_emit = &PL_regdummy;
- RExC_whilem_seen = 0;
- RExC_charnames = NULL;
- RExC_open_parens = NULL;
- RExC_close_parens = NULL;
- RExC_opend = NULL;
- RExC_paren_names = NULL;
-#ifdef DEBUGGING
- RExC_paren_name_list = NULL;
-#endif
- RExC_recurse = NULL;
- RExC_recurse_count = 0;
-
-#if 0 /* REGC() is (currently) a NOP at the first pass.
- * Clever compilers notice this and complain. --jhi */
- REGC((U8)REG_MAGIC, (char*)RExC_emit);
-#endif
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n"));
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- RExC_precomp = NULL;
- return(NULL);
- }
- if (RExC_utf8 && !RExC_orig_utf8) {
- /* It's possible to write a regexp in ascii that represents Unicode
- codepoints outside of the byte range, such as via \x{100}. If we
- detect such a sequence we have to convert the entire pattern to utf8
- and then recompile, as our sizing calculation will have been based
- on 1 byte == 1 character, but we will need to use utf8 to encode
- at least some part of the pattern, and therefore must convert the whole
- thing.
- XXX: somehow figure out how to make this less expensive...
- -- dmq */
- STRLEN len = plen;
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log,
- "UTF8 mismatch! Converting to utf8 for resizing and compile\n"));
- exp = (char*)Perl_bytes_to_utf8(aTHX_ (U8*)exp, &len);
- xend = exp + len;
- RExC_orig_utf8 = RExC_utf8;
- SAVEFREEPV(exp);
- goto redo_first_pass;
- }
- DEBUG_PARSE_r({
- PerlIO_printf(Perl_debug_log,
- "Required size %"IVdf" nodes\n"
- "Starting second pass (creation)\n",
- (IV)RExC_size);
- RExC_lastnum=0;
- RExC_lastparse=NULL;
- });
- /* Small enough for pointer-storage convention?
- If extralen==0, this means that we will not need long jumps. */
- if (RExC_size >= 0x10000L && RExC_extralen)
- RExC_size += RExC_extralen;
- else
- RExC_extralen = 0;
- if (RExC_whilem_seen > 15)
- RExC_whilem_seen = 15;
-
- /* Allocate space and zero-initialize. Note, the two step process
- of zeroing when in debug mode, thus anything assigned has to
- happen after that */
- rx = (REGEXP*) newSV_type(SVt_REGEXP);
- r = (struct regexp*)SvANY(rx);
- Newxc(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode),
- char, regexp_internal);
- if ( r == NULL || ri == NULL )
- FAIL("Regexp out of space");
-#ifdef DEBUGGING
- /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */
- Zero(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode), char);
-#else
- /* bulk initialize base fields with 0. */
- Zero(ri, sizeof(regexp_internal), char);
-#endif
-
- /* non-zero initialization begins here */
- RXi_SET( r, ri );
- r->engine= RE_ENGINE_PTR;
- r->extflags = pm_flags;
- {
- bool has_p = ((r->extflags & RXf_PMf_KEEPCOPY) == RXf_PMf_KEEPCOPY);
- bool has_minus = ((r->extflags & RXf_PMf_STD_PMMOD) != RXf_PMf_STD_PMMOD);
- bool has_runon = ((RExC_seen & REG_SEEN_RUN_ON_COMMENT)==REG_SEEN_RUN_ON_COMMENT);
- U16 reganch = (U16)((r->extflags & RXf_PMf_STD_PMMOD)
- >> RXf_PMf_STD_PMMOD_SHIFT);
- const char *fptr = STD_PAT_MODS; /*"msix"*/
- char *p;
- const STRLEN wraplen = plen + has_minus + has_p + has_runon
- + (sizeof(STD_PAT_MODS) - 1)
- + (sizeof("(?:)") - 1);
-
- p = sv_grow(MUTABLE_SV(rx), wraplen + 1);
- SvCUR_set(rx, wraplen);
- SvPOK_on(rx);
- SvFLAGS(rx) |= SvUTF8(pattern);
- *p++='('; *p++='?';
- if (has_p)
- *p++ = KEEPCOPY_PAT_MOD; /*'p'*/
- {
- char *r = p + (sizeof(STD_PAT_MODS) - 1) + has_minus - 1;
- char *colon = r + 1;
- char ch;
-
- while((ch = *fptr++)) {
- if(reganch & 1)
- *p++ = ch;
- else
- *r-- = ch;
- reganch >>= 1;
- }
- if(has_minus) {
- *r = '-';
- p = colon;
- }
- }
-
- *p++ = ':';
- Copy(RExC_precomp, p, plen, char);
- assert ((RX_WRAPPED(rx) - p) < 16);
- r->pre_prefix = p - RX_WRAPPED(rx);
- p += plen;
- if (has_runon)
- *p++ = '\n';
- *p++ = ')';
- *p = 0;
- }
-
- r->intflags = 0;
- r->nparens = RExC_npar - 1; /* set early to validate backrefs */
-
- if (RExC_seen & REG_SEEN_RECURSE) {
- Newxz(RExC_open_parens, RExC_npar,regnode *);
- SAVEFREEPV(RExC_open_parens);
- Newxz(RExC_close_parens,RExC_npar,regnode *);
- SAVEFREEPV(RExC_close_parens);
- }
-
- /* Useful during FAIL. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- Newxz(ri->u.offsets, 2*RExC_size+1, U32); /* MJD 20001228 */
- DEBUG_OFFSETS_r(PerlIO_printf(Perl_debug_log,
- "%s %"UVuf" bytes for offset annotations.\n",
- ri->u.offsets ? "Got" : "Couldn't get",
- (UV)((2*RExC_size+1) * sizeof(U32))));
-#endif
- SetProgLen(ri,RExC_size);
- RExC_rx_sv = rx;
- RExC_rx = r;
- RExC_rxi = ri;
-
- /* Second pass: emit code. */
- RExC_flags = pm_flags; /* don't let top level (?i) bleed */
- RExC_parse = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_emit_start = ri->program;
- RExC_emit = ri->program;
- RExC_emit_bound = ri->program + RExC_size + 1;
-
- /* Store the count of eval-groups for security checks: */
- RExC_rx->seen_evals = RExC_seen_evals;
- REGC((U8)REG_MAGIC, (char*) RExC_emit++);
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- ReREFCNT_dec(rx);
- return(NULL);
- }
- /* XXXX To minimize changes to RE engine we always allocate
- 3-units-long substrs field. */
- Newx(r->substrs, 1, struct reg_substr_data);
- if (RExC_recurse_count) {
- Newxz(RExC_recurse,RExC_recurse_count,regnode *);
- SAVEFREEPV(RExC_recurse);
- }
-
-reStudy:
- r->minlen = minlen = sawplus = sawopen = 0;
- Zero(r->substrs, 1, struct reg_substr_data);
-
-#ifdef TRIE_STUDY_OPT
- if (!restudied) {
- StructCopy(&zero_scan_data, &data, scan_data_t);
- copyRExC_state = RExC_state;
- } else {
- U32 seen=RExC_seen;
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log,"Restudying\n"));
-
- RExC_state = copyRExC_state;
- if (seen & REG_TOP_LEVEL_BRANCHES)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
- else
- RExC_seen &= ~REG_TOP_LEVEL_BRANCHES;
- if (data.last_found) {
- SvREFCNT_dec(data.longest_fixed);
- SvREFCNT_dec(data.longest_float);
- SvREFCNT_dec(data.last_found);
- }
- StructCopy(&zero_scan_data, &data, scan_data_t);
- }
-#else
- StructCopy(&zero_scan_data, &data, scan_data_t);
-#endif
-
- /* Dig out information for optimizations. */
- r->extflags = RExC_flags; /* was pm_op */
- /*dmq: removed as part of de-PMOP: pm->op_pmflags = RExC_flags; */
-
- if (UTF)
- SvUTF8_on(rx); /* Unicode in it? */
- ri->regstclass = NULL;
- if (RExC_naughty >= 10) /* Probably an expensive pattern. */
- r->intflags |= PREGf_NAUGHTY;
- scan = ri->program + 1; /* First BRANCH. */
-
- /* testing for BRANCH here tells us whether there is "must appear"
- data in the pattern. If there is then we can use it for optimisations */
- if (!(RExC_seen & REG_TOP_LEVEL_BRANCHES)) { /* Only one top-level choice. */
- I32 fake;
- STRLEN longest_float_length, longest_fixed_length;
- struct regnode_charclass_class ch_class; /* pointed to by data */
- int stclass_flag;
- I32 last_close = 0; /* pointed to by data */
- regnode *first= scan;
- regnode *first_next= regnext(first);
-
- /*
- * Skip introductions and multiplicators >= 1
- * so that we can extract the 'meat' of the pattern that must
- * match in the large if() sequence following.
- * NOTE that EXACT is NOT covered here, as it is normally
- * picked up by the optimiser separately.
- *
- * This is unfortunate as the optimiser isnt handling lookahead
- * properly currently.
- *
- */
- while ((OP(first) == OPEN && (sawopen = 1)) ||
- /* An OR of *one* alternative - should not happen now. */
- (OP(first) == BRANCH && OP(first_next) != BRANCH) ||
- /* for now we can't handle lookbehind IFMATCH*/
- (OP(first) == IFMATCH && !first->flags) ||
- (OP(first) == PLUS) ||
- (OP(first) == MINMOD) ||
- /* An {n,m} with n>0 */
- (PL_regkind[OP(first)] == CURLY && ARG1(first) > 0) ||
- (OP(first) == NOTHING && PL_regkind[OP(first_next)] != END ))
- {
- /*
- * the only op that could be a regnode is PLUS, all the rest
- * will be regnode_1 or regnode_2.
- *
- */
- if (OP(first) == PLUS)
- sawplus = 1;
- else
- first += regarglen[OP(first)];
-
- first = NEXTOPER(first);
- first_next= regnext(first);
- }
-
- /* Starting-point info. */
- again:
- DEBUG_PEEP("first:",first,0);
- /* Ignore EXACT as we deal with it later. */
- if (PL_regkind[OP(first)] == EXACT) {
- if (OP(first) == EXACT)
- NOOP; /* Empty, get anchored substr later. */
- else if ((OP(first) == EXACTF || OP(first) == EXACTFL))
- ri->regstclass = first;
- }
-#ifdef TRIE_STCLASS
- else if (PL_regkind[OP(first)] == TRIE &&
- ((reg_trie_data *)ri->data->data[ ARG(first) ])->minlen>0)
- {
- regnode *trie_op;
- /* this can happen only on restudy */
- if ( OP(first) == TRIE ) {
- struct regnode_1 *trieop = (struct regnode_1 *)
- PerlMemShared_calloc(1, sizeof(struct regnode_1));
- StructCopy(first,trieop,struct regnode_1);
- trie_op=(regnode *)trieop;
- } else {
- struct regnode_charclass *trieop = (struct regnode_charclass *)
- PerlMemShared_calloc(1, sizeof(struct regnode_charclass));
- StructCopy(first,trieop,struct regnode_charclass);
- trie_op=(regnode *)trieop;
- }
- OP(trie_op)+=2;
- make_trie_failtable(pRExC_state, (regnode *)first, trie_op, 0);
- ri->regstclass = trie_op;
- }
-#endif
- else if (strchr((const char*)PL_simple,OP(first)))
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOUND ||
- PL_regkind[OP(first)] == NBOUND)
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOL) {
- r->extflags |= (OP(first) == MBOL
- ? RXf_ANCH_MBOL
- : (OP(first) == SBOL
- ? RXf_ANCH_SBOL
- : RXf_ANCH_BOL));
- first = NEXTOPER(first);
- goto again;
- }
- else if (OP(first) == GPOS) {
- r->extflags |= RXf_ANCH_GPOS;
- first = NEXTOPER(first);
- goto again;
- }
- else if ((!sawopen || !RExC_sawback) &&
- (OP(first) == STAR &&
- PL_regkind[OP(NEXTOPER(first))] == REG_ANY) &&
- !(r->extflags & RXf_ANCH) && !(RExC_seen & REG_SEEN_EVAL))
- {
- /* turn .* into ^.* with an implied $*=1 */
- const int type =
- (OP(NEXTOPER(first)) == REG_ANY)
- ? RXf_ANCH_MBOL
- : RXf_ANCH_SBOL;
- r->extflags |= type;
- r->intflags |= PREGf_IMPLICIT;
- first = NEXTOPER(first);
- goto again;
- }
- if (sawplus && (!sawopen || !RExC_sawback)
- && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */
- /* x+ must match at the 1st pos of run of x's */
- r->intflags |= PREGf_SKIP;
-
- /* Scan is after the zeroth branch, first is atomic matcher. */
-#ifdef TRIE_STUDY_OPT
- DEBUG_PARSE_r(
- if (!restudied)
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#else
- DEBUG_PARSE_r(
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#endif
-
-
- /*
- * If there's something expensive in the r.e., find the
- * longest literal string that must appear and make it the
- * regmust. Resolve ties in favor of later strings, since
- * the regstart check works with the beginning of the r.e.
- * and avoiding duplication strengthens checking. Not a
- * strong reason, but sufficient in the absence of others.
- * [Now we resolve ties in favor of the earlier string if
- * it happens that c_offset_min has been invalidated, since the
- * earlier string may buy us something the later one won't.]
- */
-
- data.longest_fixed = newSVpvs("");
- data.longest_float = newSVpvs("");
- data.last_found = newSVpvs("");
- data.longest = &(data.longest_fixed);
- first = scan;
- if (!ri->regstclass) {
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- stclass_flag = SCF_DO_STCLASS_AND;
- } else /* XXXX Check for BOUND? */
- stclass_flag = 0;
- data.last_closep = &last_close;
-
- minlen = study_chunk(pRExC_state, &first, &minlen, &fake, scan + RExC_size, /* Up to end */
- &data, -1, NULL, NULL,
- SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag,0);
-
-
- CHECK_RESTUDY_GOTO;
-
-
- if ( RExC_npar == 1 && data.longest == &(data.longest_fixed)
- && data.last_start_min == 0 && data.last_end > 0
- && !RExC_seen_zerolen
- && !(RExC_seen & REG_SEEN_VERBARG)
- && (!(RExC_seen & REG_SEEN_GPOS) || (r->extflags & RXf_ANCH_GPOS)))
- r->extflags |= RXf_CHECK_ALL;
- scan_commit(pRExC_state, &data,&minlen,0);
- SvREFCNT_dec(data.last_found);
-
- /* Note that code very similar to this but for anchored string
- follows immediately below, changes may need to be made to both.
- Be careful.
- */
- longest_float_length = CHR_SVLEN(data.longest_float);
- if (longest_float_length
- || (data.flags & SF_FL_BEFORE_EOL
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */
- && data.offset_fixed == data.offset_float_min
- && SvCUR(data.longest_fixed) == SvCUR(data.longest_float))
- goto remove_float; /* As in (a)+. */
-
- /* copy the information about the longest float from the reg_scan_data
- over to the program. */
- if (SvUTF8(data.longest_float)) {
- r->float_utf8 = data.longest_float;
- r->float_substr = NULL;
- } else {
- r->float_substr = data.longest_float;
- r->float_utf8 = NULL;
- }
- /* float_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_float ? *(data.minlen_float)
- : (I32)longest_float_length;
- r->float_end_shift = ml - data.offset_float_min
- - longest_float_length + (SvTAIL(data.longest_float) != 0)
- + data.lookbehind_float;
- r->float_min_offset = data.offset_float_min - data.lookbehind_float;
- r->float_max_offset = data.offset_float_max;
- if (data.offset_float_max < I32_MAX) /* Don't offset infinity */
- r->float_max_offset -= data.lookbehind_float;
-
- t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_float, t ? FBMcf_TAIL : 0);
- }
- else {
- remove_float:
- r->float_substr = r->float_utf8 = NULL;
- SvREFCNT_dec(data.longest_float);
- longest_float_length = 0;
- }
-
- /* Note that code very similar to this but for floating string
- is immediately above, changes may need to be made to both.
- Be careful.
- */
- longest_fixed_length = CHR_SVLEN(data.longest_fixed);
- if (longest_fixed_length
- || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- /* copy the information about the longest fixed
- from the reg_scan_data over to the program. */
- if (SvUTF8(data.longest_fixed)) {
- r->anchored_utf8 = data.longest_fixed;
- r->anchored_substr = NULL;
- } else {
- r->anchored_substr = data.longest_fixed;
- r->anchored_utf8 = NULL;
- }
- /* fixed_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_fixed ? *(data.minlen_fixed)
- : (I32)longest_fixed_length;
- r->anchored_end_shift = ml - data.offset_fixed
- - longest_fixed_length + (SvTAIL(data.longest_fixed) != 0)
- + data.lookbehind_fixed;
- r->anchored_offset = data.offset_fixed - data.lookbehind_fixed;
-
- t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_fixed, t ? FBMcf_TAIL : 0);
- }
- else {
- r->anchored_substr = r->anchored_utf8 = NULL;
- SvREFCNT_dec(data.longest_fixed);
- longest_fixed_length = 0;
- }
- if (ri->regstclass
- && (OP(ri->regstclass) == REG_ANY || OP(ri->regstclass) == SANY))
- ri->regstclass = NULL;
- if ((!(r->anchored_substr || r->anchored_utf8) || r->anchored_offset)
- && stclass_flag
- && !(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV *sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
-
- /* A temporary algorithm prefers floated substr to fixed one to dig more info. */
- if (longest_fixed_length > longest_float_length) {
- r->check_end_shift = r->anchored_end_shift;
- r->check_substr = r->anchored_substr;
- r->check_utf8 = r->anchored_utf8;
- r->check_offset_min = r->check_offset_max = r->anchored_offset;
- if (r->extflags & RXf_ANCH_SINGLE)
- r->extflags |= RXf_NOSCAN;
- }
- else {
- r->check_end_shift = r->float_end_shift;
- r->check_substr = r->float_substr;
- r->check_utf8 = r->float_utf8;
- r->check_offset_min = r->float_min_offset;
- r->check_offset_max = r->float_max_offset;
- }
- /* XXXX Currently intuiting is not compatible with ANCH_GPOS.
- This should be changed ASAP! */
- if ((r->check_substr || r->check_utf8) && !(r->extflags & RXf_ANCH_GPOS)) {
- r->extflags |= RXf_USE_INTUIT;
- if (SvTAIL(r->check_substr ? r->check_substr : r->check_utf8))
- r->extflags |= RXf_INTUIT_TAIL;
- }
- /* XXX Unneeded? dmq (shouldn't as this is handled elsewhere)
- if ( (STRLEN)minlen < longest_float_length )
- minlen= longest_float_length;
- if ( (STRLEN)minlen < longest_fixed_length )
- minlen= longest_fixed_length;
- */
- }
- else {
- /* Several toplevels. Best we can is to set minlen. */
- I32 fake;
- struct regnode_charclass_class ch_class;
- I32 last_close = 0;
-
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "\nMulti Top Level\n"));
-
- scan = ri->program + 1;
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- data.last_closep = &last_close;
-
-
- minlen = study_chunk(pRExC_state, &scan, &minlen, &fake, scan + RExC_size,
- &data, -1, NULL, NULL, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS,0);
-
- CHECK_RESTUDY_GOTO;
-
- r->check_substr = r->check_utf8 = r->anchored_substr = r->anchored_utf8
- = r->float_substr = r->float_utf8 = NULL;
- if (!(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV* sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
- }
-
- /* Guard against an embedded (?=) or (?<=) with a longer minlen than
- the "real" pattern. */
- DEBUG_OPTIMISE_r({
- PerlIO_printf(Perl_debug_log,"minlen: %"IVdf" r->minlen:%"IVdf"\n",
- (IV)minlen, (IV)r->minlen);
- });
- r->minlenret = minlen;
- if (r->minlen < minlen)
- r->minlen = minlen;
-
- if (RExC_seen & REG_SEEN_GPOS)
- r->extflags |= RXf_GPOS_SEEN;
- if (RExC_seen & REG_SEEN_LOOKBEHIND)
- r->extflags |= RXf_LOOKBEHIND_SEEN;
- if (RExC_seen & REG_SEEN_EVAL)
- r->extflags |= RXf_EVAL_SEEN;
- if (RExC_seen & REG_SEEN_CANY)
- r->extflags |= RXf_CANY_SEEN;
- if (RExC_seen & REG_SEEN_VERBARG)
- r->intflags |= PREGf_VERBARG_SEEN;
- if (RExC_seen & REG_SEEN_CUTGROUP)
- r->intflags |= PREGf_CUTGROUP_SEEN;
- if (RExC_paren_names)
- RXp_PAREN_NAMES(r) = MUTABLE_HV(SvREFCNT_inc(RExC_paren_names));
- else
- RXp_PAREN_NAMES(r) = NULL;
-
-#ifdef STUPID_PATTERN_CHECKS
- if (RX_PRELEN(rx) == 0)
- r->extflags |= RXf_NULL;
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else if (RX_PRELEN(rx) == 3 && memEQ("\\s+", RX_PRECOMP(rx), 3))
- r->extflags |= RXf_WHITE;
- else if (RX_PRELEN(rx) == 1 && RXp_PRECOMP(rx)[0] == '^')
- r->extflags |= RXf_START_ONLY;
-#else
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else {
- regnode *first = ri->program + 1;
- U8 fop = OP(first);
- U8 nop = OP(NEXTOPER(first));
-
- if (PL_regkind[fop] == NOTHING && nop == END)
- r->extflags |= RXf_NULL;
- else if (PL_regkind[fop] == BOL && nop == END)
- r->extflags |= RXf_START_ONLY;
- else if (fop == PLUS && nop ==SPACE && OP(regnext(first))==END)
- r->extflags |= RXf_WHITE;
- }
-#endif
-#ifdef DEBUGGING
- if (RExC_paren_names) {
- ri->name_list_idx = add_data( pRExC_state, 1, "p" );
- ri->data->data[ri->name_list_idx] = (void*)SvREFCNT_inc(RExC_paren_name_list);
- } else
-#endif
- ri->name_list_idx = 0;
-
- if (RExC_recurse_count) {
- for ( ; RExC_recurse_count ; RExC_recurse_count-- ) {
- const regnode *scan = RExC_recurse[RExC_recurse_count-1];
- ARG2L_SET( scan, RExC_open_parens[ARG(scan)-1] - scan );
- }
- }
- Newxz(r->offs, RExC_npar, regexp_paren_pair);
- /* assume we don't need to swap parens around before we match */
-
- DEBUG_DUMP_r({
- PerlIO_printf(Perl_debug_log,"Final program:\n");
- regdump(r);
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_OFFSETS_r(if (ri->u.offsets) {
- const U32 len = ri->u.offsets[0];
- U32 i;
- GET_RE_DEBUG_FLAGS_DECL;
- PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)ri->u.offsets[0]);
- for (i = 1; i <= len; i++) {
- if (ri->u.offsets[i*2-1] || ri->u.offsets[i*2])
- PerlIO_printf(Perl_debug_log, "%"UVuf":%"UVuf"[%"UVuf"] ",
- (UV)i, (UV)ri->u.offsets[i*2-1], (UV)ri->u.offsets[i*2]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
-#endif
- return rx;
-}
-
-#undef RE_ENGINE_PTR
-
-
-SV*
-Perl_reg_named_buff(pTHX_ REGEXP * const rx, SV * const key, SV * const value,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF;
-
- PERL_UNUSED_ARG(value);
-
- if (flags & RXapif_FETCH) {
- return reg_named_buff_fetch(rx, key, flags);
- } else if (flags & (RXapif_STORE | RXapif_DELETE | RXapif_CLEAR)) {
- Perl_croak(aTHX_ "%s", PL_no_modify);
- return NULL;
- } else if (flags & RXapif_EXISTS) {
- return reg_named_buff_exists(rx, key, flags)
- ? &PL_sv_yes
- : &PL_sv_no;
- } else if (flags & RXapif_REGNAMES) {
- return reg_named_buff_all(rx, flags);
- } else if (flags & (RXapif_SCALAR | RXapif_REGNAMES_COUNT)) {
- return reg_named_buff_scalar(rx, flags);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_iter(pTHX_ REGEXP * const rx, const SV * const lastkey,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ITER;
- PERL_UNUSED_ARG(lastkey);
-
- if (flags & RXapif_FIRSTKEY)
- return reg_named_buff_firstkey(rx, flags);
- else if (flags & RXapif_NEXTKEY)
- return reg_named_buff_nextkey(rx, flags);
- else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_iter", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_fetch(pTHX_ REGEXP * const r, SV * const namesv,
- const U32 flags)
-{
- AV *retarray = NULL;
- SV *ret;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FETCH;
-
- if (flags & RXapif_ALL)
- retarray=newAV();
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HE *he_str = hv_fetch_ent( RXp_PAREN_NAMES(rx), namesv, 0, 0 );
- if (he_str) {
- IV i;
- SV* sv_dat=HeVAL(he_str);
- I32 *nums=(I32*)SvPVX(sv_dat);
- for ( i=0; i<SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->nparens) >= nums[i]
- && rx->offs[nums[i]].start != -1
- && rx->offs[nums[i]].end != -1)
- {
- ret = newSVpvs("");
- CALLREG_NUMBUF_FETCH(r,nums[i],ret);
- if (!retarray)
- return ret;
- } else {
- ret = newSVsv(&PL_sv_undef);
- }
- if (retarray)
- av_push(retarray, ret);
- }
- if (retarray)
- return newRV_noinc(MUTABLE_SV(retarray));
- }
- }
- return NULL;
-}
-
-bool
-Perl_reg_named_buff_exists(pTHX_ REGEXP * const r, SV * const key,
- const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_EXISTS;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & RXapif_ALL) {
- return hv_exists_ent(RXp_PAREN_NAMES(rx), key, 0);
- } else {
- SV *sv = CALLREG_NAMED_BUFF_FETCH(r, key, flags);
- if (sv) {
- SvREFCNT_dec(sv);
- return TRUE;
- } else {
- return FALSE;
- }
- }
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_firstkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FIRSTKEY;
-
- if ( rx && RXp_PAREN_NAMES(rx) ) {
- (void)hv_iterinit(RXp_PAREN_NAMES(rx));
-
- return CALLREG_NAMED_BUFF_NEXTKEY(r, NULL, flags & ~RXapif_FIRSTKEY);
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_nextkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_NEXTKEY;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv = RXp_PAREN_NAMES(rx);
- HE *temphe;
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- return newSVhek(HeKEY_hek(temphe));
- }
- }
- }
- return NULL;
-}
-
-SV*
-Perl_reg_named_buff_scalar(pTHX_ REGEXP * const r, const U32 flags)
-{
- SV *ret;
- AV *av;
- I32 length;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_SCALAR;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & (RXapif_ALL | RXapif_REGNAMES_COUNT)) {
- return newSViv(HvTOTALKEYS(RXp_PAREN_NAMES(rx)));
- } else if (flags & RXapif_ONE) {
- ret = CALLREG_NAMED_BUFF_ALL(r, (flags | RXapif_REGNAMES));
- av = MUTABLE_AV(SvRV(ret));
- length = av_len(av);
- SvREFCNT_dec(ret);
- return newSViv(length + 1);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_scalar", (int)flags);
- return NULL;
- }
- }
- return &PL_sv_undef;
-}
-
-SV*
-Perl_reg_named_buff_all(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- AV *av = newAV();
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ALL;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv= RXp_PAREN_NAMES(rx);
- HE *temphe;
- (void)hv_iterinit(hv);
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- av_push(av, newSVhek(HeKEY_hek(temphe)));
- }
- }
- }
-
- return newRV_noinc(MUTABLE_SV(av));
-}
-
-void
-Perl_reg_numbered_buff_fetch(pTHX_ REGEXP * const r, const I32 paren,
- SV * const sv)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- char *s = NULL;
- I32 i = 0;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_FETCH;
-
- if (!rx->subbeg) {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- else
- if (paren == RX_BUFF_IDX_PREMATCH && rx->offs[0].start != -1) {
- /* $` */
- i = rx->offs[0].start;
- s = rx->subbeg;
- }
- else
- if (paren == RX_BUFF_IDX_POSTMATCH && rx->offs[0].end != -1) {
- /* $' */
- s = rx->subbeg + rx->offs[0].end;
- i = rx->sublen - rx->offs[0].end;
- }
- else
- if ( 0 <= paren && paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- /* $& $1 ... */
- i = t1 - s1;
- s = rx->subbeg + s1;
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- assert(rx->sublen >= (s - rx->subbeg) + i );
- if (i >= 0) {
- const int oldtainted = PL_tainted;
- TAINT_NOT;
- sv_setpvn(sv, s, i);
- PL_tainted = oldtainted;
- if ( (rx->extflags & RXf_CANY_SEEN)
- ? (RXp_MATCH_UTF8(rx)
- && (!i || is_utf8_string((U8*)s, i)))
- : (RXp_MATCH_UTF8(rx)) )
- {
- SvUTF8_on(sv);
- }
- else
- SvUTF8_off(sv);
- if (PL_tainting) {
- if (RXp_MATCH_TAINTED(rx)) {
- if (SvTYPE(sv) >= SVt_PVMG) {
- MAGIC* const mg = SvMAGIC(sv);
- MAGIC* mgt;
- PL_tainted = 1;
- SvMAGIC_set(sv, mg->mg_moremagic);
- SvTAINT(sv);
- if ((mgt = SvMAGIC(sv))) {
- mg->mg_moremagic = mgt;
- SvMAGIC_set(sv, mg);
- }
- } else {
- PL_tainted = 1;
- SvTAINT(sv);
- }
- } else
- SvTAINTED_off(sv);
- }
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
-}
-
-void
-Perl_reg_numbered_buff_store(pTHX_ REGEXP * const rx, const I32 paren,
- SV const * const value)
-{
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_STORE;
-
- PERL_UNUSED_ARG(rx);
- PERL_UNUSED_ARG(paren);
- PERL_UNUSED_ARG(value);
-
- if (!PL_localizing)
- Perl_croak(aTHX_ "%s", PL_no_modify);
-}
-
-I32
-Perl_reg_numbered_buff_length(pTHX_ REGEXP * const r, const SV * const sv,
- const I32 paren)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- I32 i;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_LENGTH;
-
- /* Some of this code was originally in C<Perl_magic_len> in F<mg.c> */
- switch (paren) {
- /* $` / ${^PREMATCH} */
- case RX_BUFF_IDX_PREMATCH:
- if (rx->offs[0].start != -1) {
- i = rx->offs[0].start;
- if (i > 0) {
- s1 = 0;
- t1 = i;
- goto getlen;
- }
- }
- return 0;
- /* $' / ${^POSTMATCH} */
- case RX_BUFF_IDX_POSTMATCH:
- if (rx->offs[0].end != -1) {
- i = rx->sublen - rx->offs[0].end;
- if (i > 0) {
- s1 = rx->offs[0].end;
- t1 = rx->sublen;
- goto getlen;
- }
- }
- return 0;
- /* $& / ${^MATCH}, $1, $2, ... */
- default:
- if (paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- i = t1 - s1;
- goto getlen;
- } else {
- if (ckWARN(WARN_UNINITIALIZED))
- report_uninit((const SV *)sv);
- return 0;
- }
- }
- getlen:
- if (i > 0 && RXp_MATCH_UTF8(rx)) {
- const char * const s = rx->subbeg + s1;
- const U8 *ep;
- STRLEN el;
-
- i = t1 - s1;
- if (is_utf8_string_loclen((U8*)s, i, &ep, &el))
- i = el;
- }
- return i;
-}
-
-SV*
-Perl_reg_qr_package(pTHX_ REGEXP * const rx)
-{
- PERL_ARGS_ASSERT_REG_QR_PACKAGE;
- PERL_UNUSED_ARG(rx);
- if (0)
- return NULL;
- else
- return newSVpvs("Regexp");
-}
-
-/* Scans the name of a named buffer from the pattern.
- * If flags is REG_RSN_RETURN_NULL returns null.
- * If flags is REG_RSN_RETURN_NAME returns an SV* containing the name
- * If flags is REG_RSN_RETURN_DATA returns the data SV* corresponding
- * to the parsed name as looked up in the RExC_paren_names hash.
- * If there is an error throws a vFAIL().. type exception.
- */
-
-#define REG_RSN_RETURN_NULL 0
-#define REG_RSN_RETURN_NAME 1
-#define REG_RSN_RETURN_DATA 2
-
-STATIC SV*
-S_reg_scan_name(pTHX_ RExC_state_t *pRExC_state, U32 flags)
-{
- char *name_start = RExC_parse;
-
- PERL_ARGS_ASSERT_REG_SCAN_NAME;
-
- if (isIDFIRST_lazy_if(RExC_parse, UTF)) {
- /* skip IDFIRST by using do...while */
- if (UTF)
- do {
- RExC_parse += UTF8SKIP(RExC_parse);
- } while (isALNUM_utf8((U8*)RExC_parse));
- else
- do {
- RExC_parse++;
- } while (isALNUM(*RExC_parse));
- }
-
- if ( flags ) {
- SV* sv_name
- = newSVpvn_flags(name_start, (int)(RExC_parse - name_start),
- SVs_TEMP | (UTF ? SVf_UTF8 : 0));
- if ( flags == REG_RSN_RETURN_NAME)
- return sv_name;
- else if (flags==REG_RSN_RETURN_DATA) {
- HE *he_str = NULL;
- SV *sv_dat = NULL;
- if ( ! sv_name ) /* should not happen*/
- Perl_croak(aTHX_ "panic: no svname in reg_scan_name");
- if (RExC_paren_names)
- he_str = hv_fetch_ent( RExC_paren_names, sv_name, 0, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat )
- vFAIL("Reference to nonexistent named group");
- return sv_dat;
- }
- else {
- Perl_croak(aTHX_ "panic: bad flag in reg_scan_name");
- }
- /* NOT REACHED */
- }
- return NULL;
-}
-
-#define DEBUG_PARSE_MSG(funcname) DEBUG_PARSE_r({ \
- int rem=(int)(RExC_end - RExC_parse); \
- int cut; \
- int num; \
- int iscut=0; \
- if (rem>10) { \
- rem=10; \
- iscut=1; \
- } \
- cut=10-rem; \
- if (RExC_lastparse!=RExC_parse) \
- PerlIO_printf(Perl_debug_log," >%.*s%-*s", \
- rem, RExC_parse, \
- cut + 4, \
- iscut ? "..." : "<" \
- ); \
- else \
- PerlIO_printf(Perl_debug_log,"%16s",""); \
- \
- if (SIZE_ONLY) \
- num = RExC_size + 1; \
- else \
- num=REG_NODE_NUM(RExC_emit); \
- if (RExC_lastnum!=num) \
- PerlIO_printf(Perl_debug_log,"|%4d",num); \
- else \
- PerlIO_printf(Perl_debug_log,"|%4s",""); \
- PerlIO_printf(Perl_debug_log,"|%*s%-4s", \
- (int)((depth*2)), "", \
- (funcname) \
- ); \
- RExC_lastnum=num; \
- RExC_lastparse=RExC_parse; \
-})
-
-
-
-#define DEBUG_PARSE(funcname) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,"%4s","\n"); \
-})
-#define DEBUG_PARSE_FMT(funcname,fmt,args) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,fmt "\n",args); \
-})
-/*
- - reg - regular expression, i.e. main body or parenthesized thing
- *
- * Caller must absorb opening parenthesis.
- *
- * Combining parenthesis handling with the base level of regular expression
- * is a trifle forced, but the need to tie the tails of the branches to what
- * follows makes it hard to avoid.
- */
-#define REGTAIL(x,y,z) regtail((x),(y),(z),depth+1)
-#ifdef DEBUGGING
-#define REGTAIL_STUDY(x,y,z) regtail_study((x),(y),(z),depth+1)
-#else
-#define REGTAIL_STUDY(x,y,z) regtail((x),(y),(z),depth+1)
-#endif
-
-STATIC regnode *
-S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth)
- /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */
-{
- dVAR;
- register regnode *ret; /* Will be the head of the group. */
- register regnode *br;
- register regnode *lastbr;
- register regnode *ender = NULL;
- register I32 parno = 0;
- I32 flags;
- U32 oregflags = RExC_flags;
- bool have_branch = 0;
- bool is_open = 0;
- I32 freeze_paren = 0;
- I32 after_freeze = 0;
-
- /* for (?g), (?gc), and (?o) warnings; warning
- about (?c) will warn about (?g) -- japhy */
-
-#define WASTED_O 0x01
-#define WASTED_G 0x02
-#define WASTED_C 0x04
-#define WASTED_GC (0x02|0x04)
- I32 wastedflags = 0x00;
-
- char * parse_start = RExC_parse; /* MJD */
- char * const oregcomp_parse = RExC_parse;
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG;
- DEBUG_PARSE("reg ");
-
- *flagp = 0; /* Tentatively. */
-
-
- /* Make an OPEN node, if parenthesized. */
- if (paren) {
- if ( *RExC_parse == '*') { /* (*VERB:ARG) */
- char *start_verb = RExC_parse;
- STRLEN verb_len = 0;
- char *start_arg = NULL;
- unsigned char op = 0;
- int argok = 1;
- int internal_argval = 0; /* internal_argval is only useful if !argok */
- while ( *RExC_parse && *RExC_parse != ')' ) {
- if ( *RExC_parse == ':' ) {
- start_arg = RExC_parse + 1;
- break;
- }
- RExC_parse++;
- }
- ++start_verb;
- verb_len = RExC_parse - start_verb;
- if ( start_arg ) {
- RExC_parse++;
- while ( *RExC_parse && *RExC_parse != ')' )
- RExC_parse++;
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern argument");
- if ( RExC_parse == start_arg )
- start_arg = NULL;
- } else {
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern");
- }
-
- switch ( *start_verb ) {
- case 'A': /* (*ACCEPT) */
- if ( memEQs(start_verb,verb_len,"ACCEPT") ) {
- op = ACCEPT;
- internal_argval = RExC_nestroot;
- }
- break;
- case 'C': /* (*COMMIT) */
- if ( memEQs(start_verb,verb_len,"COMMIT") )
- op = COMMIT;
- break;
- case 'F': /* (*FAIL) */
- if ( verb_len==1 || memEQs(start_verb,verb_len,"FAIL") ) {
- op = OPFAIL;
- argok = 0;
- }
- break;
- case ':': /* (*:NAME) */
- case 'M': /* (*MARK:NAME) */
- if ( verb_len==0 || memEQs(start_verb,verb_len,"MARK") ) {
- op = MARKPOINT;
- argok = -1;
- }
- break;
- case 'P': /* (*PRUNE) */
- if ( memEQs(start_verb,verb_len,"PRUNE") )
- op = PRUNE;
- break;
- case 'S': /* (*SKIP) */
- if ( memEQs(start_verb,verb_len,"SKIP") )
- op = SKIP;
- break;
- case 'T': /* (*THEN) */
- /* [19:06] <TimToady> :: is then */
- if ( memEQs(start_verb,verb_len,"THEN") ) {
- op = CUTGROUP;
- RExC_seen |= REG_SEEN_CUTGROUP;
- }
- break;
- }
- if ( ! op ) {
- RExC_parse++;
- vFAIL3("Unknown verb pattern '%.*s'",
- verb_len, start_verb);
- }
- if ( argok ) {
- if ( start_arg && internal_argval ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else if ( argok < 0 && !start_arg ) {
- vFAIL3("Verb pattern '%.*s' has a mandatory argument",
- verb_len, start_verb);
- } else {
- ret = reganode(pRExC_state, op, internal_argval);
- if ( ! internal_argval && ! SIZE_ONLY ) {
- if (start_arg) {
- SV *sv = newSVpvn( start_arg, RExC_parse - start_arg);
- ARG(ret) = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[ARG(ret)]=(void*)sv;
- ret->flags = 0;
- } else {
- ret->flags = 1;
- }
- }
- }
- if (!internal_argval)
- RExC_seen |= REG_SEEN_VERBARG;
- } else if ( start_arg ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else {
- ret = reg_node(pRExC_state, op);
- }
- nextchar(pRExC_state);
- return ret;
- } else
- if (*RExC_parse == '?') { /* (?...) */
- bool is_logical = 0;
- const char * const seqstart = RExC_parse;
-
- RExC_parse++;
- paren = *RExC_parse++;
- ret = NULL; /* For look-ahead/behind. */
- switch (paren) {
-
- case 'P': /* (?P...) variants for those used to PCRE/Python */
- paren = *RExC_parse++;
- if ( paren == '<') /* (?P<...>) named capture */
- goto named_capture;
- else if (paren == '>') { /* (?P>name) named recursion */
- goto named_recursion;
- }
- else if (paren == '=') { /* (?P=...) named backref */
- /* this pretty much dupes the code for \k<NAME> in regatom(), if
- you change this make sure you change that */
- char* name_start = RExC_parse;
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ')')
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
-
- nextchar(pRExC_state);
- return ret;
- }
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- case '<': /* (?<...) */
- if (*RExC_parse == '!')
- paren = ',';
- else if (*RExC_parse != '=')
- named_capture:
- { /* (?<...>) */
- char *name_start;
- SV *svname;
- paren= '>';
- case '\'': /* (?'...') */
- name_start= RExC_parse;
- svname = reg_scan_name(pRExC_state,
- SIZE_ONLY ? /* reverse test from the others */
- REG_RSN_RETURN_NAME :
- REG_RSN_RETURN_NULL);
- if (RExC_parse == name_start) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- if (*RExC_parse != paren)
- vFAIL2("Sequence (?%c... not terminated",
- paren=='>' ? '<' : paren);
- if (SIZE_ONLY) {
- HE *he_str;
- SV *sv_dat = NULL;
- if (!svname) /* shouldnt happen */
- Perl_croak(aTHX_
- "panic: reg_scan_name returned NULL");
- if (!RExC_paren_names) {
- RExC_paren_names= newHV();
- sv_2mortal(MUTABLE_SV(RExC_paren_names));
-#ifdef DEBUGGING
- RExC_paren_name_list= newAV();
- sv_2mortal(MUTABLE_SV(RExC_paren_name_list));
-#endif
- }
- he_str = hv_fetch_ent( RExC_paren_names, svname, 1, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat ) {
- /* croak baby croak */
- Perl_croak(aTHX_
- "panic: paren_name hash element allocation failed");
- } else if ( SvPOK(sv_dat) ) {
- /* (?|...) can mean we have dupes so scan to check
- its already been stored. Maybe a flag indicating
- we are inside such a construct would be useful,
- but the arrays are likely to be quite small, so
- for now we punt -- dmq */
- IV count = SvIV(sv_dat);
- I32 *pv = (I32*)SvPVX(sv_dat);
- IV i;
- for ( i = 0 ; i < count ; i++ ) {
- if ( pv[i] == RExC_npar ) {
- count = 0;
- break;
- }
- }
- if ( count ) {
- pv = (I32*)SvGROW(sv_dat, SvCUR(sv_dat) + sizeof(I32)+1);
- SvCUR_set(sv_dat, SvCUR(sv_dat) + sizeof(I32));
- pv[count] = RExC_npar;
- SvIV_set(sv_dat, SvIVX(sv_dat) + 1);
- }
- } else {
- (void)SvUPGRADE(sv_dat,SVt_PVNV);
- sv_setpvn(sv_dat, (char *)&(RExC_npar), sizeof(I32));
- SvIOK_on(sv_dat);
- SvIV_set(sv_dat, 1);
- }
-#ifdef DEBUGGING
- if (!av_store(RExC_paren_name_list, RExC_npar, SvREFCNT_inc(svname)))
- SvREFCNT_dec(svname);
-#endif
-
- /*sv_dump(sv_dat);*/
- }
- nextchar(pRExC_state);
- paren = 1;
- goto capturing_parens;
- }
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- RExC_parse++;
- case '=': /* (?=...) */
- RExC_seen_zerolen++;
- break;
- case '!': /* (?!...) */
- RExC_seen_zerolen++;
- if (*RExC_parse == ')') {
- ret=reg_node(pRExC_state, OPFAIL);
- nextchar(pRExC_state);
- return ret;
- }
- break;
- case '|': /* (?|...) */
- /* branch reset, behave like a (?:...) except that
- buffers in alternations share the same numbers */
- paren = ':';
- after_freeze = freeze_paren = RExC_npar;
- break;
- case ':': /* (?:...) */
- case '>': /* (?>...) */
- break;
- case '$': /* (?$...) */
- case '@': /* (?@...) */
- vFAIL2("Sequence (?%c...) not implemented", (int)paren);
- break;
- case '#': /* (?#...) */
- while (*RExC_parse && *RExC_parse != ')')
- RExC_parse++;
- if (*RExC_parse != ')')
- FAIL("Sequence (?#... not terminated");
- nextchar(pRExC_state);
- *flagp = TRYAGAIN;
- return NULL;
- case '0' : /* (?0) */
- case 'R' : /* (?R) */
- if (*RExC_parse != ')')
- FAIL("Sequence (?R) not terminated");
- ret = reg_node(pRExC_state, GOSTART);
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- /*notreached*/
- { /* named and numeric backreferences */
- I32 num;
- case '&': /* (?&NAME) */
- parse_start = RExC_parse - 1;
- named_recursion:
- {
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- num = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- goto gen_recurse_regop;
- /* NOT REACHED */
- case '+':
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse++;
- vFAIL("Illegal pattern");
- }
- goto parse_recursion;
- /* NOT REACHED*/
- case '-': /* (?-1) */
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse--; /* rewind to let it be handled later */
- goto parse_flags;
- }
- /*FALLTHROUGH */
- case '1': case '2': case '3': case '4': /* (?1) */
- case '5': case '6': case '7': case '8': case '9':
- RExC_parse--;
- parse_recursion:
- num = atoi(RExC_parse);
- parse_start = RExC_parse - 1; /* MJD */
- if (*RExC_parse == '-')
- RExC_parse++;
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (*RExC_parse!=')')
- vFAIL("Expecting close bracket");
-
- gen_recurse_regop:
- if ( paren == '-' ) {
- /*
- Diagram of capture buffer numbering.
- Top line is the normal capture buffer numbers
- Botton line is the negative indexing as from
- the X (the (?-2))
-
- + 1 2 3 4 5 X 6 7
- /(a(x)y)(a(b(c(?-2)d)e)f)(g(h))/
- - 5 4 3 2 1 X x x
-
- */
- num = RExC_npar + num;
- if (num < 1) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- } else if ( paren == '+' ) {
- num = RExC_npar + num - 1;
- }
-
- ret = reganode(pRExC_state, GOSUB, num);
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- ARG2L_SET( ret, RExC_recurse_count++);
- RExC_emit++;
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Recurse #%"UVuf" to %"IVdf"\n", (UV)ARG(ret), (IV)ARG2L(ret)));
- } else {
- RExC_size++;
- }
- RExC_seen |= REG_SEEN_RECURSE;
- Set_Node_Length(ret, 1 + regarglen[OP(ret)]); /* MJD */
- Set_Node_Offset(ret, parse_start); /* MJD */
-
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- } /* named and numeric backreferences */
- /* NOT REACHED */
-
- case '?': /* (??...) */
- is_logical = 1;
- if (*RExC_parse != '{') {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- *flagp |= POSTPONED;
- paren = *RExC_parse++;
- /* FALL THROUGH */
- case '{': /* (?{...}) */
- {
- I32 count = 1;
- U32 n = 0;
- char c;
- char *s = RExC_parse;
-
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_EVAL;
- while (count && (c = *RExC_parse)) {
- if (c == '\\') {
- if (RExC_parse[1])
- RExC_parse++;
- }
- else if (c == '{')
- count++;
- else if (c == '}')
- count--;
- RExC_parse++;
- }
- if (*RExC_parse != ')') {
- RExC_parse = s;
- vFAIL("Sequence (?{...}) not terminated or not {}-balanced");
- }
- if (!SIZE_ONLY) {
- PAD *pad;
- OP_4tree *sop, *rop;
- SV * const sv = newSVpvn(s, RExC_parse - 1 - s);
-
- ENTER;
- Perl_save_re_context(aTHX);
- rop = sv_compile_2op(sv, &sop, "re", &pad);
- sop->op_private |= OPpREFCOUNTED;
- /* re_dup will OpREFCNT_inc */
- OpREFCNT_set(sop, 1);
- LEAVE;
-
- n = add_data(pRExC_state, 3, "nop");
- RExC_rxi->data->data[n] = (void*)rop;
- RExC_rxi->data->data[n+1] = (void*)sop;
- RExC_rxi->data->data[n+2] = (void*)pad;
- SvREFCNT_dec(sv);
- }
- else { /* First pass */
- if (PL_reginterp_cnt < ++RExC_seen_evals
- && IN_PERL_RUNTIME)
- /* No compiled RE interpolated, has runtime
- components ===> unsafe. */
- FAIL("Eval-group not allowed at runtime, use re 'eval'");
- if (PL_tainting && PL_tainted)
- FAIL("Eval-group in insecure regular expression");
-#if PERL_VERSION > 8
- if (IN_PERL_COMPILETIME)
- PL_cv_has_eval = 1;
-#endif
- }
-
- nextchar(pRExC_state);
- if (is_logical) {
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 2;
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, EVAL, n));
- /* deal with the length of this later - MJD */
- return ret;
- }
- ret = reganode(pRExC_state, EVAL, n);
- Set_Node_Length(ret, RExC_parse - parse_start + 1);
- Set_Node_Offset(ret, parse_start);
- return ret;
- }
- case '(': /* (?(?{...})...) and (?(?=...)...) */
- {
- int is_define= 0;
- if (RExC_parse[0] == '?') { /* (?(?...)) */
- if (RExC_parse[1] == '=' || RExC_parse[1] == '!'
- || RExC_parse[1] == '<'
- || RExC_parse[1] == '{') { /* Lookahead or eval. */
- I32 flag;
-
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 1;
- REGTAIL(pRExC_state, ret, reg(pRExC_state, 1, &flag,depth+1));
- goto insert_if;
- }
- }
- else if ( RExC_parse[0] == '<' /* (?(<NAME>)...) */
- || RExC_parse[0] == '\'' ) /* (?('NAME')...) */
- {
- char ch = RExC_parse[0] == '<' ? '>' : '\'';
- char *name_start= RExC_parse++;
- U32 num = 0;
- SV *sv_dat=reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence (?(%c... not terminated",
- (ch == '>' ? '<' : ch));
- RExC_parse++;
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- ret = reganode(pRExC_state,NGROUPP,num);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'D' &&
- RExC_parse[1] == 'E' &&
- RExC_parse[2] == 'F' &&
- RExC_parse[3] == 'I' &&
- RExC_parse[4] == 'N' &&
- RExC_parse[5] == 'E')
- {
- ret = reganode(pRExC_state,DEFINEP,0);
- RExC_parse +=6 ;
- is_define = 1;
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'R') {
- RExC_parse++;
- parno = 0;
- if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- parno = atoi(RExC_parse++);
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- } else if (RExC_parse[0] == '&') {
- SV *sv_dat;
- RExC_parse++;
- sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- parno = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- ret = reganode(pRExC_state,INSUBP,parno);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- /* (?(1)...) */
- char c;
- parno = atoi(RExC_parse++);
-
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- ret = reganode(pRExC_state, GROUPP, parno);
-
- insert_if_check_paren:
- if ((c = *nextchar(pRExC_state)) != ')')
- vFAIL("Switch condition not recognized");
- insert_if:
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0));
- br = regbranch(pRExC_state, &flags, 1,depth+1);
- if (br == NULL)
- br = reganode(pRExC_state, LONGJMP, 0);
- else
- REGTAIL(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0));
- c = *nextchar(pRExC_state);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- if (c == '|') {
- if (is_define)
- vFAIL("(?(DEFINE)....) does not allow branches");
- lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */
- regbranch(pRExC_state, &flags, 1,depth+1);
- REGTAIL(pRExC_state, ret, lastbr);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- c = *nextchar(pRExC_state);
- }
- else
- lastbr = NULL;
- if (c != ')')
- vFAIL("Switch (?(condition)... contains too many branches");
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, br, ender);
- if (lastbr) {
- REGTAIL(pRExC_state, lastbr, ender);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender);
- }
- else
- REGTAIL(pRExC_state, ret, ender);
- RExC_size++; /* XXX WHY do we need this?!!
- For large programs it seems to be required
- but I can't figure out why. -- dmq*/
- return ret;
- }
- else {
- vFAIL2("Unknown switch condition (?(%.2s", RExC_parse);
- }
- }
- case 0:
- RExC_parse--; /* for vFAIL to print correctly */
- vFAIL("Sequence (? incomplete");
- break;
- default:
- --RExC_parse;
- parse_flags: /* (?i) */
- {
- U32 posflags = 0, negflags = 0;
- U32 *flagsp = &posflags;
-
- while (*RExC_parse) {
- /* && strchr("iogcmsx", *RExC_parse) */
- /* (?g), (?gc) and (?o) are useless here
- and must be globally applied -- japhy */
- switch (*RExC_parse) {
- CASE_STD_PMMOD_FLAGS_PARSE_SET(flagsp);
- case ONCE_PAT_MOD: /* 'o' */
- case GLOBAL_PAT_MOD: /* 'g' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- const I32 wflagbit = *RExC_parse == 'o' ? WASTED_O : WASTED_G;
- if (! (wastedflags & wflagbit) ) {
- wastedflags |= wflagbit;
- vWARN5(
- RExC_parse + 1,
- "Useless (%s%c) - %suse /%c modifier",
- flagsp == &negflags ? "?-" : "?",
- *RExC_parse,
- flagsp == &negflags ? "don't " : "",
- *RExC_parse
- );
- }
- }
- break;
-
- case CONTINUE_PAT_MOD: /* 'c' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- if (! (wastedflags & WASTED_C) ) {
- wastedflags |= WASTED_GC;
- vWARN3(
- RExC_parse + 1,
- "Useless (%sc) - %suse /gc modifier",
- flagsp == &negflags ? "?-" : "?",
- flagsp == &negflags ? "don't " : ""
- );
- }
- }
- break;
- case KEEPCOPY_PAT_MOD: /* 'p' */
- if (flagsp == &negflags) {
- if (SIZE_ONLY)
- ckWARNreg(RExC_parse + 1,"Useless use of (?-p)");
- } else {
- *flagsp |= RXf_PMf_KEEPCOPY;
- }
- break;
- case '-':
- if (flagsp == &negflags) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- flagsp = &negflags;
- wastedflags = 0; /* reset so (?g-c) warns twice */
- break;
- case ':':
- paren = ':';
- /*FALLTHROUGH*/
- case ')':
- RExC_flags |= posflags;
- RExC_flags &= ~negflags;
- if (paren != ':') {
- oregflags |= posflags;
- oregflags &= ~negflags;
- }
- nextchar(pRExC_state);
- if (paren != ':') {
- *flagp = TRYAGAIN;
- return NULL;
- } else {
- ret = NULL;
- goto parse_rest;
- }
- /*NOTREACHED*/
- default:
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- ++RExC_parse;
- }
- }} /* one for the default block, one for the switch */
- }
- else { /* (...) */
- capturing_parens:
- parno = RExC_npar;
- RExC_npar++;
-
- ret = reganode(pRExC_state, OPEN, parno);
- if (!SIZE_ONLY ){
- if (!RExC_nestroot)
- RExC_nestroot = parno;
- if (RExC_seen & REG_SEEN_RECURSE
- && !RExC_open_parens[parno-1])
- {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting open paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ret)));
- RExC_open_parens[parno-1]= ret;
- }
- }
- Set_Node_Length(ret, 1); /* MJD */
- Set_Node_Offset(ret, RExC_parse); /* MJD */
- is_open = 1;
- }
- }
- else /* ! paren */
- ret = NULL;
-
- parse_rest:
- /* Pick up the branches, linking them together. */
- parse_start = RExC_parse; /* MJD */
- br = regbranch(pRExC_state, &flags, 1,depth+1);
-
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
-
- /* branch_len = (paren != 0); */
-
- if (br == NULL)
- return(NULL);
- if (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, BRANCHJ, br, depth+1);
- }
- else { /* MJD */
- reginsert(pRExC_state, BRANCH, br, depth+1);
- Set_Node_Length(br, paren != 0);
- Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start);
- }
- have_branch = 1;
- if (SIZE_ONLY)
- RExC_extralen += 1; /* For BRANCHJ-BRANCH. */
- }
- else if (paren == ':') {
- *flagp |= flags&SIMPLE;
- }
- if (is_open) { /* Starts with OPEN. */
- REGTAIL(pRExC_state, ret, br); /* OPEN -> first. */
- }
- else if (paren != '?') /* Not Conditional */
- ret = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- lastbr = br;
- while (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- ender = reganode(pRExC_state, LONGJMP,0);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */
- }
- if (SIZE_ONLY)
- RExC_extralen += 2; /* Account for LONGJMP. */
- nextchar(pRExC_state);
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
- br = regbranch(pRExC_state, &flags, 0, depth+1);
-
- if (br == NULL)
- return(NULL);
- REGTAIL(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */
- lastbr = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- }
-
- if (have_branch || paren != ':') {
- /* Make a closing node, and hook it on the end. */
- switch (paren) {
- case ':':
- ender = reg_node(pRExC_state, TAIL);
- break;
- case 1:
- ender = reganode(pRExC_state, CLOSE, parno);
- if (!SIZE_ONLY && RExC_seen & REG_SEEN_RECURSE) {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting close paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ender)));
- RExC_close_parens[parno-1]= ender;
- if (RExC_nestroot == parno)
- RExC_nestroot = 0;
- }
- Set_Node_Offset(ender,RExC_parse+1); /* MJD */
- Set_Node_Length(ender,1); /* MJD */
- break;
- case '<':
- case ',':
- case '=':
- case '!':
- *flagp &= ~HASWIDTH;
- /* FALL THROUGH */
- case '>':
- ender = reg_node(pRExC_state, SUCCEED);
- break;
- case 0:
- ender = reg_node(pRExC_state, END);
- if (!SIZE_ONLY) {
- assert(!RExC_opend); /* there can only be one! */
- RExC_opend = ender;
- }
- break;
- }
- REGTAIL(pRExC_state, lastbr, ender);
-
- if (have_branch && !SIZE_ONLY) {
- if (depth==1)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
-
- /* Hook the tails of the branches to the closing node. */
- for (br = ret; br; br = regnext(br)) {
- const U8 op = PL_regkind[OP(br)];
- if (op == BRANCH) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(br), ender);
- }
- else if (op == BRANCHJ) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(NEXTOPER(br)), ender);
- }
- }
- }
- }
-
- {
- const char *p;
- static const char parens[] = "=!<,>";
-
- if (paren && (p = strchr(parens, paren))) {
- U8 node = ((p - parens) % 2) ? UNLESSM : IFMATCH;
- int flag = (p - parens) > 1;
-
- if (paren == '>')
- node = SUSPEND, flag = 0;
- reginsert(pRExC_state, node,ret, depth+1);
- Set_Node_Cur_Length(ret);
- Set_Node_Offset(ret, parse_start + 1);
- ret->flags = flag;
- REGTAIL_STUDY(pRExC_state, ret, reg_node(pRExC_state, TAIL));
- }
- }
-
- /* Check for proper termination. */
- if (paren) {
- RExC_flags = oregflags;
- if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched (");
- }
- }
- else if (!paren && RExC_parse < RExC_end) {
- if (*RExC_parse == ')') {
- RExC_parse++;
- vFAIL("Unmatched )");
- }
- else
- FAIL("Junk on end of regexp"); /* "Can't happen". */
- /* NOTREACHED */
- }
- if (after_freeze)
- RExC_npar = after_freeze;
- return(ret);
-}
-
-/*
- - regbranch - one alternative of an | operator
- *
- * Implements the concatenation operator.
- */
-STATIC regnode *
-S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register regnode *chain = NULL;
- register regnode *latest;
- I32 flags = 0, c = 0;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGBRANCH;
-
- DEBUG_PARSE("brnc");
-
- if (first)
- ret = NULL;
- else {
- if (!SIZE_ONLY && RExC_extralen)
- ret = reganode(pRExC_state, BRANCHJ,0);
- else {
- ret = reg_node(pRExC_state, BRANCH);
- Set_Node_Length(ret, 1);
- }
- }
-
- if (!first && SIZE_ONLY)
- RExC_extralen += 1; /* BRANCHJ */
-
- *flagp = WORST; /* Tentatively. */
-
- RExC_parse--;
- nextchar(pRExC_state);
- while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') {
- flags &= ~TRYAGAIN;
- latest = regpiece(pRExC_state, &flags,depth+1);
- if (latest == NULL) {
- if (flags & TRYAGAIN)
- continue;
- return(NULL);
- }
- else if (ret == NULL)
- ret = latest;
- *flagp |= flags&(HASWIDTH|POSTPONED);
- if (chain == NULL) /* First piece. */
- *flagp |= flags&SPSTART;
- else {
- RExC_naughty++;
- REGTAIL(pRExC_state, chain, latest);
- }
- chain = latest;
- c++;
- }
- if (chain == NULL) { /* Loop ran zero times. */
- chain = reg_node(pRExC_state, NOTHING);
- if (ret == NULL)
- ret = chain;
- }
- if (c == 1) {
- *flagp |= flags&SIMPLE;
- }
-
- return ret;
-}
-
-/*
- - regpiece - something followed by possible [*+?]
- *
- * Note that the branching code sequences used for ? and the general cases
- * of * and + are somewhat optimized: they use the same NOTHING node as
- * both the endmarker for their branch list and the body of the last branch.
- * It might seem that this node could be dispensed with entirely, but the
- * endmarker role is not redundant.
- */
-STATIC regnode *
-S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register char op;
- register char *next;
- I32 flags;
- const char * const origparse = RExC_parse;
- I32 min;
- I32 max = REG_INFTY;
- char *parse_start;
- const char *maxpos = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPIECE;
-
- DEBUG_PARSE("piec");
-
- ret = regatom(pRExC_state, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN)
- *flagp |= TRYAGAIN;
- return(NULL);
- }
-
- op = *RExC_parse;
-
- if (op == '{' && regcurly(RExC_parse)) {
- maxpos = NULL;
- parse_start = RExC_parse; /* MJD */
- next = RExC_parse + 1;
- while (isDIGIT(*next) || *next == ',') {
- if (*next == ',') {
- if (maxpos)
- break;
- else
- maxpos = next;
- }
- next++;
- }
- if (*next == '}') { /* got one */
- if (!maxpos)
- maxpos = next;
- RExC_parse++;
- min = atoi(RExC_parse);
- if (*maxpos == ',')
- maxpos++;
- else
- maxpos = RExC_parse;
- max = atoi(maxpos);
- if (!max && *maxpos != '0')
- max = REG_INFTY; /* meaning "infinity" */
- else if (max >= REG_INFTY)
- vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1);
- RExC_parse = next;
- nextchar(pRExC_state);
-
- do_curly:
- if ((flags&SIMPLE)) {
- RExC_naughty += 2 + RExC_naughty / 2;
- reginsert(pRExC_state, CURLY, ret, depth+1);
- Set_Node_Offset(ret, parse_start+1); /* MJD */
- Set_Node_Cur_Length(ret);
- }
- else {
- regnode * const w = reg_node(pRExC_state, WHILEM);
-
- w->flags = 0;
- REGTAIL(pRExC_state, ret, w);
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, LONGJMP,ret, depth+1);
- reginsert(pRExC_state, NOTHING,ret, depth+1);
- NEXT_OFF(ret) = 3; /* Go over LONGJMP. */
- }
- reginsert(pRExC_state, CURLYX,ret, depth+1);
- /* MJD hk */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Length(ret,
- op == '{' ? (RExC_parse - parse_start) : 1);
-
- if (!SIZE_ONLY && RExC_extralen)
- NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */
- REGTAIL(pRExC_state, ret, reg_node(pRExC_state, NOTHING));
- if (SIZE_ONLY)
- RExC_whilem_seen++, RExC_extralen += 3;
- RExC_naughty += 4 + RExC_naughty; /* compound interest */
- }
- ret->flags = 0;
-
- if (min > 0)
- *flagp = WORST;
- if (max > 0)
- *flagp |= HASWIDTH;
- if (max < min)
- vFAIL("Can't do {n,m} with n > m");
- if (!SIZE_ONLY) {
- ARG1_SET(ret, (U16)min);
- ARG2_SET(ret, (U16)max);
- }
-
- goto nest_check;
- }
- }
-
- if (!ISMULT1(op)) {
- *flagp = flags;
- return(ret);
- }
-
-#if 0 /* Now runtime fix should be reliable. */
-
- /* if this is reinstated, don't forget to put this back into perldiag:
-
- =item Regexp *+ operand could be empty at {#} in regex m/%s/
-
- (F) The part of the regexp subject to either the * or + quantifier
- could match an empty string. The {#} shows in the regular
- expression about where the problem was discovered.
-
- */
-
- if (!(flags&HASWIDTH) && op != '?')
- vFAIL("Regexp *+ operand could be empty");
-#endif
-
- parse_start = RExC_parse;
- nextchar(pRExC_state);
-
- *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH);
-
- if (op == '*' && (flags&SIMPLE)) {
- reginsert(pRExC_state, STAR, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 4;
- }
- else if (op == '*') {
- min = 0;
- goto do_curly;
- }
- else if (op == '+' && (flags&SIMPLE)) {
- reginsert(pRExC_state, PLUS, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 3;
- }
- else if (op == '+') {
- min = 1;
- goto do_curly;
- }
- else if (op == '?') {
- min = 0; max = 1;
- goto do_curly;
- }
- nest_check:
- if (!SIZE_ONLY && !(flags&(HASWIDTH|POSTPONED)) && max > REG_INFTY/3) {
- ckWARN3reg(RExC_parse,
- "%.*s matches null string many times",
- (int)(RExC_parse >= origparse ? RExC_parse - origparse : 0),
- origparse);
- }
-
- if (RExC_parse < RExC_end && *RExC_parse == '?') {
- nextchar(pRExC_state);
- reginsert(pRExC_state, MINMOD, ret, depth+1);
- REGTAIL(pRExC_state, ret, ret + NODE_STEP_REGNODE);
- }
-#ifndef REG_ALLOW_MINMOD_SUSPEND
- else
-#endif
- if (RExC_parse < RExC_end && *RExC_parse == '+') {
- regnode *ender;
- nextchar(pRExC_state);
- ender = reg_node(pRExC_state, SUCCEED);
- REGTAIL(pRExC_state, ret, ender);
- reginsert(pRExC_state, SUSPEND, ret, depth+1);
- ret->flags = 0;
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, ret, ender);
- /*ret= ender;*/
- }
-
- if (RExC_parse < RExC_end && ISMULT2(RExC_parse)) {
- RExC_parse++;
- vFAIL("Nested quantifiers");
- }
-
- return(ret);
-}
-
-
-/* reg_namedseq(pRExC_state,UVp)
-
- This is expected to be called by a parser routine that has
- recognized '\N' and needs to handle the rest. RExC_parse is
- expected to point at the first char following the N at the time
- of the call.
-
- If valuep is non-null then it is assumed that we are parsing inside
- of a charclass definition and the first codepoint in the resolved
- string is returned via *valuep and the routine will return NULL.
- In this mode if a multichar string is returned from the charnames
- handler a warning will be issued, and only the first char in the
- sequence will be examined. If the string returned is zero length
- then the value of *valuep is undefined and NON-NULL will
- be returned to indicate failure. (This will NOT be a valid pointer
- to a regnode.)
-
- If valuep is null then it is assumed that we are parsing normal text
- and inserts a new EXACT node into the program containing the resolved
- string and returns a pointer to the new node. If the string is
- zerolength a NOTHING node is emitted.
-
- On success RExC_parse is set to the char following the endbrace.
- Parsing failures will generate a fatal errorvia vFAIL(...)
-
- NOTE: We cache all results from the charnames handler locally in
- the RExC_charnames hash (created on first use) to prevent a charnames
- handler from playing silly-buggers and returning a short string and
- then a long string for a given pattern. Since the regexp program
- size is calculated during an initial parse this would result
- in a buffer overrun so we cache to prevent the charname result from
- changing during the course of the parse.
-
- */
-STATIC regnode *
-S_reg_namedseq(pTHX_ RExC_state_t *pRExC_state, UV *valuep, I32 *flagp)
-{
- char * name; /* start of the content of the name */
- char * endbrace; /* endbrace following the name */
- SV *sv_str = NULL;
- SV *sv_name = NULL;
- STRLEN len; /* this has various purposes throughout the code */
- bool cached = 0; /* if this is true then we shouldn't refcount dev sv_str */
- regnode *ret = NULL;
-
- PERL_ARGS_ASSERT_REG_NAMEDSEQ;
-
- if (*RExC_parse != '{' ||
- (*RExC_parse == '{' && RExC_parse[1]
- && strchr("0123456789", RExC_parse[1])))
- {
- GET_RE_DEBUG_FLAGS_DECL;
- if (valuep)
- /* no bare \N in a charclass */
- vFAIL("Missing braces on \\N{}");
- GET_RE_DEBUG_FLAGS;
- nextchar(pRExC_state);
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- RExC_parse--;
- Set_Node_Length(ret, 1); /* MJD */
- return ret;
- }
- name = RExC_parse+1;
- endbrace = strchr(RExC_parse, '}');
- if ( ! endbrace ) {
- RExC_parse++;
- vFAIL("Missing right brace on \\N{}");
- }
- RExC_parse = endbrace + 1;
-
-
- /* RExC_parse points at the beginning brace,
- endbrace points at the last */
- if ( name[0]=='U' && name[1]=='+' ) {
- /* its a "Unicode hex" notation {U+89AB} */
- I32 fl = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX
- | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0);
- UV cp;
- len = (STRLEN)(endbrace - name - 2);
- cp = grok_hex(name + 2, &len, &fl, NULL);
- if ( len != (STRLEN)(endbrace - name - 2) ) {
- cp = 0xFFFD;
- }
- if ( valuep ) {
- if (cp > 0xff) RExC_utf8 = 1;
- *valuep = cp;
- return NULL;
- }
-
- /* Need to convert to utf8 if either: won't fit into a byte, or the re
- * is going to be in utf8 and the representation changes under utf8. */
- if (cp > 0xff || (RExC_utf8 && ! UNI_IS_INVARIANT(cp))) {
- U8 string[UTF8_MAXBYTES+1];
- U8 *tmps;
- RExC_utf8 = 1;
- tmps = uvuni_to_utf8(string, cp);
- sv_str = newSVpvn_utf8((char*)string, tmps - string, TRUE);
- } else { /* Otherwise, no need for utf8, can skip that step */
- char string;
- string = (char)cp;
- sv_str= newSVpvn(&string, 1);
- }
- } else {
- /* fetch the charnames handler for this scope */
- HV * const table = GvHV(PL_hintgv);
- SV **cvp= table ?
- hv_fetchs(table, "charnames", FALSE) :
- NULL;
- SV *cv= cvp ? *cvp : NULL;
- HE *he_str;
- int count;
- /* create an SV with the name as argument */
- sv_name = newSVpvn(name, endbrace - name);
-
- if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
- vFAIL2("Constant(\\N{%" SVf "}) unknown: "
- "(possibly a missing \"use charnames ...\")",
- SVfARG(sv_name));
- }
- if (!cvp || !SvOK(*cvp)) { /* when $^H{charnames} = undef; */
- vFAIL2("Constant(\\N{%" SVf "}): "
- "$^H{charnames} is not defined", SVfARG(sv_name));
- }
-
-
-
- if (!RExC_charnames) {
- /* make sure our cache is allocated */
- RExC_charnames = newHV();
- sv_2mortal(MUTABLE_SV(RExC_charnames));
- }
- /* see if we have looked this one up before */
- he_str = hv_fetch_ent( RExC_charnames, sv_name, 0, 0 );
- if ( he_str ) {
- sv_str = HeVAL(he_str);
- cached = 1;
- } else {
- dSP ;
-
- ENTER ;
- SAVETMPS ;
- PUSHMARK(SP) ;
-
- XPUSHs(sv_name);
-
- PUTBACK ;
-
- count= call_sv(cv, G_SCALAR);
-
- if (count == 1) { /* XXXX is this right? dmq */
- sv_str = POPs;
- SvREFCNT_inc_simple_void(sv_str);
- }
-
- SPAGAIN ;
- PUTBACK ;
- FREETMPS ;
- LEAVE ;
-
- if ( !sv_str || !SvOK(sv_str) ) {
- vFAIL2("Constant(\\N{%" SVf "}): Call to &{$^H{charnames}} "
- "did not return a defined value", SVfARG(sv_name));
- }
- if (hv_store_ent( RExC_charnames, sv_name, sv_str, 0))
- cached = 1;
- }
- }
- if (valuep) {
- char *p = SvPV(sv_str, len);
- if (len) {
- STRLEN numlen = 1;
- if ( SvUTF8(sv_str) ) {
- *valuep = utf8_to_uvchr((U8*)p, &numlen);
- if (*valuep > 0x7F)
- RExC_utf8 = 1;
- /* XXXX
- We have to turn on utf8 for high bit chars otherwise
- we get failures with
-
- "ss" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
- "SS" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
-
- This is different from what \x{} would do with the same
- codepoint, where the condition is > 0xFF.
- - dmq
- */
-
-
- } else {
- *valuep = (UV)*p;
- /* warn if we havent used the whole string? */
- }
- if (numlen<len && SIZE_ONLY) {
- ckWARN2reg(RExC_parse,
- "Ignoring excess chars from \\N{%" SVf "} in character class",
- SVfARG(sv_name)
- );
- }
- } else if (SIZE_ONLY) {
- ckWARN2reg(RExC_parse,
- "Ignoring zero length \\N{%" SVf "} in character class",
- SVfARG(sv_name)
- );
- }
- SvREFCNT_dec(sv_name);
- if (!cached)
- SvREFCNT_dec(sv_str);
- return len ? NULL : (regnode *)&len;
- } else if(SvCUR(sv_str)) {
-
- char *s;
- char *p, *pend;
- STRLEN charlen = 1;
-#ifdef DEBUGGING
- char * parse_start = name-3; /* needed for the offsets */
-#endif
- GET_RE_DEBUG_FLAGS_DECL; /* needed for the offsets */
-
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s= STRING(ret);
-
- if ( RExC_utf8 && !SvUTF8(sv_str) ) {
- sv_utf8_upgrade(sv_str);
- } else if ( !RExC_utf8 && SvUTF8(sv_str) ) {
- RExC_utf8= 1;
- }
-
- p = SvPV(sv_str, len);
- pend = p + len;
- /* len is the length written, charlen is the size the char read */
- for ( len = 0; p < pend; p += charlen ) {
- if (UTF) {
- UV uvc = utf8_to_uvchr((U8*)p, &charlen);
- if (FOLD) {
- STRLEN foldlen,numlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
- uvc = toFOLD_uni(uvc, tmpbuf, &foldlen);
- /* Emit all the Unicode characters. */
-
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen)
- {
- uvc = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- } else {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- } else {
- len++;
- REGC(*p, s++);
- }
- }
- if (SIZE_ONLY) {
- RExC_size += STR_SZ(len);
- } else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- } else { /* zero length */
- ret = reg_node(pRExC_state,NOTHING);
- }
- SvREFCNT_dec(sv_name);
- if (!cached)
- SvREFCNT_dec(sv_str);
- return ret;
-
-}
-
-
-/*
- * reg_recode
- *
- * It returns the code point in utf8 for the value in *encp.
- * value: a code value in the source encoding
- * encp: a pointer to an Encode object
- *
- * If the result from Encode is not a single character,
- * it returns U+FFFD (Replacement character) and sets *encp to NULL.
- */
-STATIC UV
-S_reg_recode(pTHX_ const char value, SV **encp)
-{
- STRLEN numlen = 1;
- SV * const sv = newSVpvn_flags(&value, numlen, SVs_TEMP);
- const char * const s = *encp ? sv_recode_to_utf8(sv, *encp) : SvPVX(sv);
- const STRLEN newlen = SvCUR(sv);
- UV uv = UNICODE_REPLACEMENT;
-
- PERL_ARGS_ASSERT_REG_RECODE;
-
- if (newlen)
- uv = SvUTF8(sv)
- ? utf8n_to_uvchr((U8*)s, newlen, &numlen, UTF8_ALLOW_DEFAULT)
- : *(U8*)s;
-
- if (!newlen || numlen != newlen) {
- uv = UNICODE_REPLACEMENT;
- *encp = NULL;
- }
- return uv;
-}
-
-
-/*
- - regatom - the lowest level
-
- Try to identify anything special at the start of the pattern. If there
- is, then handle it as required. This may involve generating a single regop,
- such as for an assertion; or it may involve recursing, such as to
- handle a () structure.
-
- If the string doesn't start with something special then we gobble up
- as much literal text as we can.
-
- Once we have been able to handle whatever type of thing started the
- sequence, we return.
-
- Note: we have to be careful with escapes, as they can be both literal
- and special, and in the case of \10 and friends can either, depending
- on context. Specifically there are two seperate switches for handling
- escape sequences, with the one for handling literal escapes requiring
- a dummy entry for all of the special escapes that are actually handled
- by the other.
-*/
-
-STATIC regnode *
-S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret = NULL;
- I32 flags;
- char *parse_start = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_PARSE("atom");
- *flagp = WORST; /* Tentatively. */
-
- PERL_ARGS_ASSERT_REGATOM;
-
-tryagain:
- switch ((U8)*RExC_parse) {
- case '^':
- RExC_seen_zerolen++;
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MBOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SBOL);
- else
- ret = reg_node(pRExC_state, BOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '$':
- nextchar(pRExC_state);
- if (*RExC_parse)
- RExC_seen_zerolen++;
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MEOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SEOL);
- else
- ret = reg_node(pRExC_state, EOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '.':
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SANY);
- else
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '[':
- {
- char * const oregcomp_parse = ++RExC_parse;
- ret = regclass(pRExC_state,depth+1);
- if (*RExC_parse != ']') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched [");
- }
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */
- break;
- }
- case '(':
- nextchar(pRExC_state);
- ret = reg(pRExC_state, 1, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN) {
- if (RExC_parse == RExC_end) {
- /* Make parent create an empty node if needed. */
- *flagp |= TRYAGAIN;
- return(NULL);
- }
- goto tryagain;
- }
- return(NULL);
- }
- *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE|POSTPONED);
- break;
- case '|':
- case ')':
- if (flags & TRYAGAIN) {
- *flagp |= TRYAGAIN;
- return NULL;
- }
- vFAIL("Internal urp");
- /* Supposed to be caught earlier. */
- break;
- case '{':
- if (!regcurly(RExC_parse)) {
- RExC_parse++;
- goto defchar;
- }
- /* FALL THROUGH */
- case '?':
- case '+':
- case '*':
- RExC_parse++;
- vFAIL("Quantifier follows nothing");
- break;
- case 0xDF:
- case 0xC3:
- case 0xCE:
- do_foldchar:
- if (!LOC && FOLD) {
- U32 len,cp;
- len=0; /* silence a spurious compiler warning */
- if ((cp = what_len_TRICKYFOLD_safe(RExC_parse,RExC_end,UTF,len))) {
- *flagp |= HASWIDTH; /* could be SIMPLE too, but needs a handler in regexec.regrepeat */
- RExC_parse+=len-1; /* we get one from nextchar() as well. :-( */
- ret = reganode(pRExC_state, FOLDCHAR, cp);
- Set_Node_Length(ret, 1); /* MJD */
- nextchar(pRExC_state); /* kill whitespace under /x */
- return ret;
- }
- }
- goto outer_default;
- case '\\':
- /* Special Escapes
-
- This switch handles escape sequences that resolve to some kind
- of special regop and not to literal text. Escape sequnces that
- resolve to literal text are handled below in the switch marked
- "Literal Escapes".
-
- Every entry in this switch *must* have a corresponding entry
- in the literal escape switch. However, the opposite is not
- required, as the default for this switch is to jump to the
- literal text handling code.
- */
- switch ((U8)*++RExC_parse) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- goto do_foldchar;
- /* Special Escapes */
- case 'A':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, SBOL);
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'G':
- ret = reg_node(pRExC_state, GPOS);
- RExC_seen |= REG_SEEN_GPOS;
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'K':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, KEEPS);
- *flagp |= SIMPLE;
- /* XXX:dmq : disabling in-place substitution seems to
- * be necessary here to avoid cases of memory corruption, as
- * with: C<$_="x" x 80; s/x\K/y/> -- rgs
- */
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- goto finish_meta_pat;
- case 'Z':
- ret = reg_node(pRExC_state, SEOL);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'z':
- ret = reg_node(pRExC_state, EOS);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'C':
- ret = reg_node(pRExC_state, CANY);
- RExC_seen |= REG_SEEN_CANY;
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'X':
- ret = reg_node(pRExC_state, CLUMP);
- *flagp |= HASWIDTH;
- goto finish_meta_pat;
- case 'w':
- ret = reg_node(pRExC_state, (U8)(LOC ? ALNUML : ALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'W':
- ret = reg_node(pRExC_state, (U8)(LOC ? NALNUML : NALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'b':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? BOUNDL : BOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'B':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? NBOUNDL : NBOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 's':
- ret = reg_node(pRExC_state, (U8)(LOC ? SPACEL : SPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'S':
- ret = reg_node(pRExC_state, (U8)(LOC ? NSPACEL : NSPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'd':
- ret = reg_node(pRExC_state, DIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'D':
- ret = reg_node(pRExC_state, NDIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'R':
- ret = reg_node(pRExC_state, LNBREAK);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'h':
- ret = reg_node(pRExC_state, HORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'H':
- ret = reg_node(pRExC_state, NHORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'v':
- ret = reg_node(pRExC_state, VERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'V':
- ret = reg_node(pRExC_state, NVERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- finish_meta_pat:
- nextchar(pRExC_state);
- Set_Node_Length(ret, 2); /* MJD */
- break;
- case 'p':
- case 'P':
- {
- char* const oldregxend = RExC_end;
-#ifdef DEBUGGING
- char* parse_start = RExC_parse - 2;
-#endif
-
- if (RExC_parse[1] == '{') {
- /* a lovely hack--pretend we saw [\pX] instead */
- RExC_end = strchr(RExC_parse, '}');
- if (!RExC_end) {
- const U8 c = (U8)*RExC_parse;
- RExC_parse += 2;
- RExC_end = oldregxend;
- vFAIL2("Missing right brace on \\%c{}", c);
- }
- RExC_end++;
- }
- else {
- RExC_end = RExC_parse + 2;
- if (RExC_end > oldregxend)
- RExC_end = oldregxend;
- }
- RExC_parse--;
-
- ret = regclass(pRExC_state,depth+1);
-
- RExC_end = oldregxend;
- RExC_parse--;
-
- Set_Node_Offset(ret, parse_start + 2);
- Set_Node_Cur_Length(ret);
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- }
- break;
- case 'N':
- /* Handle \N and \N{NAME} here and not below because it can be
- multicharacter. join_exact() will join them up later on.
- Also this makes sure that things like /\N{BLAH}+/ and
- \N{BLAH} being multi char Just Happen. dmq*/
- ++RExC_parse;
- ret= reg_namedseq(pRExC_state, NULL, flagp);
- break;
- case 'k': /* Handle \k<NAME> and \k'NAME' */
- parse_named_seq:
- {
- char ch= RExC_parse[1];
- if (ch != '<' && ch != '\'' && ch != '{') {
- RExC_parse++;
- vFAIL2("Sequence %.2s... not terminated",parse_start);
- } else {
- /* this pretty much dupes the code for (?P=...) in reg(), if
- you change this make sure you change that */
- char* name_start = (RExC_parse += 2);
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- ch= (ch == '<') ? '>' : (ch == '{') ? '}' : '\'';
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
-
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
-
- }
- break;
- }
- case 'g':
- case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 num;
- bool isg = *RExC_parse == 'g';
- bool isrel = 0;
- bool hasbrace = 0;
- if (isg) {
- RExC_parse++;
- if (*RExC_parse == '{') {
- RExC_parse++;
- hasbrace = 1;
- }
- if (*RExC_parse == '-') {
- RExC_parse++;
- isrel = 1;
- }
- if (hasbrace && !isDIGIT(*RExC_parse)) {
- if (isrel) RExC_parse--;
- RExC_parse -= 2;
- goto parse_named_seq;
- } }
- num = atoi(RExC_parse);
- if (isg && num == 0)
- vFAIL("Reference to invalid group 0");
- if (isrel) {
- num = RExC_npar - num;
- if (num < 1)
- vFAIL("Reference to nonexistent or unclosed group");
- }
- if (!isg && num > 9 && num >= RExC_npar)
- goto defchar;
- else {
- char * const parse_start = RExC_parse - 1; /* MJD */
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (parse_start == RExC_parse - 1)
- vFAIL("Unterminated \\g... pattern");
- if (hasbrace) {
- if (*RExC_parse != '}')
- vFAIL("Unterminated \\g{...} pattern");
- RExC_parse++;
- }
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens)
- vFAIL("Reference to nonexistent group");
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? REFFL : REFF) : REF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- }
- }
- break;
- case '\0':
- if (RExC_parse >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- /* Do not generate "unrecognized" warnings here, we fall
- back into the quick-grab loop below */
- parse_start--;
- goto defchar;
- }
- break;
-
- case '#':
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if ( reg_skipcomment( pRExC_state ) )
- goto tryagain;
- }
- /* FALL THROUGH */
-
- default:
- outer_default:{
- register STRLEN len;
- register UV ender;
- register char *p;
- char *s;
- STRLEN foldlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
-
- parse_start = RExC_parse - 1;
-
- RExC_parse++;
-
- defchar:
- ender = 0;
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s = STRING(ret);
- for (len = 0, p = RExC_parse - 1;
- len < 127 && p < RExC_end;
- len++)
- {
- char * const oldp = p;
-
- if (RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- switch ((U8)*p) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case '^':
- case '$':
- case '.':
- case '[':
- case '(':
- case ')':
- case '|':
- goto loopdone;
- case '\\':
- /* Literal Escapes Switch
-
- This switch is meant to handle escape sequences that
- resolve to a literal character.
-
- Every escape sequence that represents something
- else, like an assertion or a char class, is handled
- in the switch marked 'Special Escapes' above in this
- routine, but also has an entry here as anything that
- isn't explicitly mentioned here will be treated as
- an unescaped equivalent literal.
- */
-
- switch ((U8)*++p) {
- /* These are all the special escapes. */
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case 'A': /* Start assertion */
- case 'b': case 'B': /* Word-boundary assertion*/
- case 'C': /* Single char !DANGEROUS! */
- case 'd': case 'D': /* digit class */
- case 'g': case 'G': /* generic-backref, pos assertion */
- case 'h': case 'H': /* HORIZWS */
- case 'k': case 'K': /* named backref, keep marker */
- case 'N': /* named char sequence */
- case 'p': case 'P': /* Unicode property */
- case 'R': /* LNBREAK */
- case 's': case 'S': /* space class */
- case 'v': case 'V': /* VERTWS */
- case 'w': case 'W': /* word class */
- case 'X': /* eXtended Unicode "combining character sequence" */
- case 'z': case 'Z': /* End of line/string assertion */
- --p;
- goto loopdone;
-
- /* Anything after here is an escape that resolves to a
- literal. (Except digits, which may or may not)
- */
- case 'n':
- ender = '\n';
- p++;
- break;
- case 'r':
- ender = '\r';
- p++;
- break;
- case 't':
- ender = '\t';
- p++;
- break;
- case 'f':
- ender = '\f';
- p++;
- break;
- case 'e':
- ender = ASCII_TO_NATIVE('\033');
- p++;
- break;
- case 'a':
- ender = ASCII_TO_NATIVE('\007');
- p++;
- break;
- case 'x':
- if (*++p == '{') {
- char* const e = strchr(p, '}');
-
- if (!e) {
- RExC_parse = p + 1;
- vFAIL("Missing right brace on \\x{}");
- }
- else {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = e - p - 1;
- ender = grok_hex(p + 1, &numlen, &flags, NULL);
- if (ender > 0xff)
- RExC_utf8 = 1;
- p = e + 1;
- }
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = 2;
- ender = grok_hex(p, &numlen, &flags, NULL);
- p += numlen;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- p++;
- ender = UCHARAT(p++);
- ender = toCTRL(ender);
- break;
- case '0': case '1': case '2': case '3':case '4':
- case '5': case '6': case '7': case '8':case '9':
- if (*p == '0' ||
- (isDIGIT(p[1]) && atoi(p) >= RExC_npar) ) {
- I32 flags = 0;
- STRLEN numlen = 3;
- ender = grok_oct(p, &numlen, &flags, NULL);
-
- /* An octal above 0xff is interpreted differently
- * depending on if the re is in utf8 or not. If it
- * is in utf8, the value will be itself, otherwise
- * it is interpreted as modulo 0x100. It has been
- * decided to discourage the use of octal above the
- * single-byte range. For now, warn only when
- * it ends up modulo */
- if (SIZE_ONLY && ender >= 0x100
- && ! UTF && ! PL_encoding) {
- ckWARNregdep(p, "Use of octal value above 377 is deprecated");
- }
- p += numlen;
- }
- else {
- --p;
- goto loopdone;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- recode_encoding:
- {
- SV* enc = PL_encoding;
- ender = reg_recode((const char)(U8)ender, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(p, "Invalid escape in the specified encoding");
- RExC_utf8 = 1;
- }
- break;
- case '\0':
- if (p >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- if (!SIZE_ONLY&& isALPHA(*p))
- ckWARN2reg(p + 1, "Unrecognized escape \\%c passed through", UCHARAT(p));
- goto normal_default;
- }
- break;
- default:
- normal_default:
- if (UTF8_IS_START(*p) && UTF) {
- STRLEN numlen;
- ender = utf8n_to_uvchr((U8*)p, RExC_end - p,
- &numlen, UTF8_ALLOW_DEFAULT);
- p += numlen;
- }
- else
- ender = *p++;
- break;
- }
- if ( RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- if (UTF && FOLD) {
- /* Prime the casefolded buffer. */
- ender = toFOLD_uni(ender, tmpbuf, &foldlen);
- }
- if (p < RExC_end && ISMULT2(p)) { /* Back off on ?+*. */
- if (len)
- p = oldp;
- else if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- }
- else {
- len++;
- REGC((char)ender, s++);
- }
- break;
- }
- if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- len += unilen;
- s += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break;
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- len--;
- }
- else
- REGC((char)ender, s++);
- }
- loopdone:
- RExC_parse = p - 1;
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
- {
- /* len is STRLEN which is unsigned, need to copy to signed */
- IV iv = len;
- if (iv < 0)
- vFAIL("Internal disaster");
- }
- if (len > 0)
- *flagp |= HASWIDTH;
- if (len == 1 && UNI_IS_INVARIANT(ender))
- *flagp |= SIMPLE;
-
- if (SIZE_ONLY)
- RExC_size += STR_SZ(len);
- else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- }
- break;
- }
-
- return(ret);
-}
-
-STATIC char *
-S_regwhite( RExC_state_t *pRExC_state, char *p )
-{
- const char *e = RExC_end;
-
- PERL_ARGS_ASSERT_REGWHITE;
-
- while (p < e) {
- if (isSPACE(*p))
- ++p;
- else if (*p == '#') {
- bool ended = 0;
- do {
- if (*p++ == '\n') {
- ended = 1;
- break;
- }
- } while (p < e);
- if (!ended)
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- }
- else
- break;
- }
- return p;
-}
-
-/* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]].
- Character classes ([:foo:]) can also be negated ([:^foo:]).
- Returns a named class id (ANYOF_XXX) if successful, -1 otherwise.
- Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed,
- but trigger failures because they are currently unimplemented. */
-
-#define POSIXCC_DONE(c) ((c) == ':')
-#define POSIXCC_NOTYET(c) ((c) == '=' || (c) == '.')
-#define POSIXCC(c) (POSIXCC_DONE(c) || POSIXCC_NOTYET(c))
-
-STATIC I32
-S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value)
-{
- dVAR;
- I32 namedclass = OOB_NAMEDCLASS;
-
- PERL_ARGS_ASSERT_REGPPOSIXCC;
-
- if (value == '[' && RExC_parse + 1 < RExC_end &&
- /* I smell either [: or [= or [. -- POSIX has been here, right? */
- POSIXCC(UCHARAT(RExC_parse))) {
- const char c = UCHARAT(RExC_parse);
- char* const s = RExC_parse++;
-
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != c)
- RExC_parse++;
- if (RExC_parse == RExC_end)
- /* Grandfather lone [:, [=, [. */
- RExC_parse = s;
- else {
- const char* const t = RExC_parse++; /* skip over the c */
- assert(*t == c);
-
- if (UCHARAT(RExC_parse) == ']') {
- const char *posixcc = s + 1;
- RExC_parse++; /* skip over the ending ] */
-
- if (*s == ':') {
- const I32 complement = *posixcc == '^' ? *posixcc++ : 0;
- const I32 skip = t - posixcc;
-
- /* Initially switch on the length of the name. */
- switch (skip) {
- case 4:
- if (memEQ(posixcc, "word", 4)) /* this is not POSIX, this is the Perl \w */
- namedclass = complement ? ANYOF_NALNUM : ANYOF_ALNUM;
- break;
- case 5:
- /* Names all of length 5. */
- /* alnum alpha ascii blank cntrl digit graph lower
- print punct space upper */
- /* Offset 4 gives the best switch position. */
- switch (posixcc[4]) {
- case 'a':
- if (memEQ(posixcc, "alph", 4)) /* alpha */
- namedclass = complement ? ANYOF_NALPHA : ANYOF_ALPHA;
- break;
- case 'e':
- if (memEQ(posixcc, "spac", 4)) /* space */
- namedclass = complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC;
- break;
- case 'h':
- if (memEQ(posixcc, "grap", 4)) /* graph */
- namedclass = complement ? ANYOF_NGRAPH : ANYOF_GRAPH;
- break;
- case 'i':
- if (memEQ(posixcc, "asci", 4)) /* ascii */
- namedclass = complement ? ANYOF_NASCII : ANYOF_ASCII;
- break;
- case 'k':
- if (memEQ(posixcc, "blan", 4)) /* blank */
- namedclass = complement ? ANYOF_NBLANK : ANYOF_BLANK;
- break;
- case 'l':
- if (memEQ(posixcc, "cntr", 4)) /* cntrl */
- namedclass = complement ? ANYOF_NCNTRL : ANYOF_CNTRL;
- break;
- case 'm':
- if (memEQ(posixcc, "alnu", 4)) /* alnum */
- namedclass = complement ? ANYOF_NALNUMC : ANYOF_ALNUMC;
- break;
- case 'r':
- if (memEQ(posixcc, "lowe", 4)) /* lower */
- namedclass = complement ? ANYOF_NLOWER : ANYOF_LOWER;
- else if (memEQ(posixcc, "uppe", 4)) /* upper */
- namedclass = complement ? ANYOF_NUPPER : ANYOF_UPPER;
- break;
- case 't':
- if (memEQ(posixcc, "digi", 4)) /* digit */
- namedclass = complement ? ANYOF_NDIGIT : ANYOF_DIGIT;
- else if (memEQ(posixcc, "prin", 4)) /* print */
- namedclass = complement ? ANYOF_NPRINT : ANYOF_PRINT;
- else if (memEQ(posixcc, "punc", 4)) /* punct */
- namedclass = complement ? ANYOF_NPUNCT : ANYOF_PUNCT;
- break;
- }
- break;
- case 6:
- if (memEQ(posixcc, "xdigit", 6))
- namedclass = complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT;
- break;
- }
-
- if (namedclass == OOB_NAMEDCLASS)
- Simple_vFAIL3("POSIX class [:%.*s:] unknown",
- t - s - 1, s + 1);
- assert (posixcc[skip] == ':');
- assert (posixcc[skip+1] == ']');
- } else if (!SIZE_ONLY) {
- /* [[=foo=]] and [[.foo.]] are still future. */
-
- /* adjust RExC_parse so the warning shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse) != ']')
- RExC_parse++;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- } else {
- /* Maternal grandfather:
- * "[:" ending in ":" but not in ":]" */
- RExC_parse = s;
- }
- }
- }
-
- return namedclass;
-}
-
-STATIC void
-S_checkposixcc(pTHX_ RExC_state_t *pRExC_state)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_CHECKPOSIXCC;
-
- if (POSIXCC(UCHARAT(RExC_parse))) {
- const char *s = RExC_parse;
- const char c = *s++;
-
- while (isALNUM(*s))
- s++;
- if (*s && c == *s && s[1] == ']') {
- ckWARN3reg(s+2,
- "POSIX syntax [%c %c] belongs inside character classes",
- c, c);
-
- /* [[=foo=]] and [[.foo.]] are still future. */
- if (POSIXCC_NOTYET(c)) {
- /* adjust RExC_parse so the error shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse++) != ']')
- NOOP;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- }
- }
-}
-
-
-#define _C_C_T_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_N##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '!'; \
- what = WORD; \
- break
-
-#define _C_C_T_NOLOC_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '!'; \
- what = WORD; \
- break
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define POSIX_CC_UNI_NAME(CCNAME) CCNAME
-#else
-#define POSIX_CC_UNI_NAME(CCNAME) "Posix" CCNAME
-#endif
-
-/*
- parse a class specification and produce either an ANYOF node that
- matches the pattern or if the pattern matches a single char only and
- that char is < 256 and we are case insensitive then we produce an
- EXACT node instead.
-*/
-
-STATIC regnode *
-S_regclass(pTHX_ RExC_state_t *pRExC_state, U32 depth)
-{
- dVAR;
- register UV nextvalue;
- register IV prevvalue = OOB_UNICODE;
- register IV range = 0;
- UV value = 0; /* XXX:dmq: needs to be referenceable (unfortunately) */
- register regnode *ret;
- STRLEN numlen;
- IV namedclass;
- char *rangebegin = NULL;
- bool need_class = 0;
- SV *listsv = NULL;
- UV n;
- bool optimize_invert = TRUE;
- AV* unicode_alternate = NULL;
-#ifdef EBCDIC
- UV literal_endpoint = 0;
-#endif
- UV stored = 0; /* number of chars stored in the class */
-
- regnode * const orig_emit = RExC_emit; /* Save the original RExC_emit in
- case we need to change the emitted regop to an EXACT. */
- const char * orig_parse = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCLASS;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- DEBUG_PARSE("clas");
-
- /* Assume we are going to generate an ANYOF node. */
- ret = reganode(pRExC_state, ANYOF, 0);
-
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) = 0;
-
- if (UCHARAT(RExC_parse) == '^') { /* Complement of range. */
- RExC_naughty++;
- RExC_parse++;
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) |= ANYOF_INVERT;
- }
-
- if (SIZE_ONLY) {
- RExC_size += ANYOF_SKIP;
- listsv = &PL_sv_undef; /* For code scanners: listsv always non-NULL. */
- }
- else {
- RExC_emit += ANYOF_SKIP;
- if (FOLD)
- ANYOF_FLAGS(ret) |= ANYOF_FOLD;
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_LOCALE;
- ANYOF_BITMAP_ZERO(ret);
- listsv = newSVpvs("# comment\n");
- }
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
-
- if (!SIZE_ONLY && POSIXCC(nextvalue))
- checkposixcc(pRExC_state);
-
- /* allow 1st char to be ] (allowing it to be - is dealt with later) */
- if (UCHARAT(RExC_parse) == ']')
- goto charclassloop;
-
-parseit:
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != ']') {
-
- charclassloop:
-
- namedclass = OOB_NAMEDCLASS; /* initialize as illegal */
-
- if (!range)
- rangebegin = RExC_parse;
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
- if (value == '[' && POSIXCC(nextvalue))
- namedclass = regpposixcc(pRExC_state, value);
- else if (value == '\\') {
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
- /* Some compilers cannot handle switching on 64-bit integer
- * values, therefore value cannot be an UV. Yes, this will
- * be a problem later if we want switch on Unicode.
- * A similar issue a little bit later when switching on
- * namedclass. --jhi */
- switch ((I32)value) {
- case 'w': namedclass = ANYOF_ALNUM; break;
- case 'W': namedclass = ANYOF_NALNUM; break;
- case 's': namedclass = ANYOF_SPACE; break;
- case 'S': namedclass = ANYOF_NSPACE; break;
- case 'd': namedclass = ANYOF_DIGIT; break;
- case 'D': namedclass = ANYOF_NDIGIT; break;
- case 'v': namedclass = ANYOF_VERTWS; break;
- case 'V': namedclass = ANYOF_NVERTWS; break;
- case 'h': namedclass = ANYOF_HORIZWS; break;
- case 'H': namedclass = ANYOF_NHORIZWS; break;
- case 'N': /* Handle \N{NAME} in class */
- {
- /* We only pay attention to the first char of
- multichar strings being returned. I kinda wonder
- if this makes sense as it does change the behaviour
- from earlier versions, OTOH that behaviour was broken
- as well. */
- UV v; /* value is register so we cant & it /grrr */
- if (reg_namedseq(pRExC_state, &v, NULL)) {
- goto parseit;
- }
- value= v;
- }
- break;
- case 'p':
- case 'P':
- {
- char *e;
- if (RExC_parse >= RExC_end)
- vFAIL2("Empty \\%c{}", (U8)value);
- if (*RExC_parse == '{') {
- const U8 c = (U8)value;
- e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL2("Missing right brace on \\%c{}", c);
- while (isSPACE(UCHARAT(RExC_parse)))
- RExC_parse++;
- if (e == RExC_parse)
- vFAIL2("Empty \\%c{}", c);
- n = e - RExC_parse;
- while (isSPACE(UCHARAT(RExC_parse + n - 1)))
- n--;
- }
- else {
- e = RExC_parse;
- n = 1;
- }
- if (!SIZE_ONLY) {
- if (UCHARAT(RExC_parse) == '^') {
- RExC_parse++;
- n--;
- value = value == 'p' ? 'P' : 'p'; /* toggle */
- while (isSPACE(UCHARAT(RExC_parse))) {
- RExC_parse++;
- n--;
- }
- }
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::%.*s\n",
- (value=='p' ? '+' : '!'), (int)n, RExC_parse);
- }
- RExC_parse = e + 1;
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- namedclass = ANYOF_MAX; /* no official name, but it's named */
- }
- break;
- case 'n': value = '\n'; break;
- case 'r': value = '\r'; break;
- case 't': value = '\t'; break;
- case 'f': value = '\f'; break;
- case 'b': value = '\b'; break;
- case 'e': value = ASCII_TO_NATIVE('\033');break;
- case 'a': value = ASCII_TO_NATIVE('\007');break;
- case 'x':
- if (*RExC_parse == '{') {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- char * const e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL("Missing right brace on \\x{}");
-
- numlen = e - RExC_parse;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse = e + 1;
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- numlen = 2;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- }
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- value = UCHARAT(RExC_parse++);
- value = toCTRL(value);
- break;
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 flags = 0;
- numlen = 3;
- value = grok_oct(--RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- }
- recode_encoding:
- {
- SV* enc = PL_encoding;
- value = reg_recode((const char)(U8)value, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(RExC_parse,
- "Invalid escape in the specified encoding");
- break;
- }
- default:
- if (!SIZE_ONLY && isALPHA(value))
- ckWARN2reg(RExC_parse,
- "Unrecognized escape \\%c in character class passed through",
- (int)value);
- break;
- }
- } /* end of \blah */
-#ifdef EBCDIC
- else
- literal_endpoint++;
-#endif
-
- if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */
-
- if (!SIZE_ONLY && !need_class)
- ANYOF_CLASS_ZERO(ret);
-
- need_class = 1;
-
- /* a bad range like a-\d, a-[:digit:] ? */
- if (range) {
- if (!SIZE_ONLY) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- ckWARN4reg(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
-
- if (prevvalue < 256) {
- ANYOF_BITMAP_SET(ret, prevvalue);
- ANYOF_BITMAP_SET(ret, '-');
- }
- else {
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-');
- }
- }
-
- range = 0; /* this was not a true range */
- }
-
-
-
- if (!SIZE_ONLY) {
- const char *what = NULL;
- char yesno = 0;
-
- if (namedclass > OOB_NAMEDCLASS)
- optimize_invert = FALSE;
- /* Possible truncation here but in some 64-bit environments
- * the compiler gets heartburn about switch on 64-bit values.
- * A similar issue a little earlier when switching on value.
- * --jhi */
- switch ((I32)namedclass) {
-
- case _C_C_T_(ALNUMC, isALNUMC(value), POSIX_CC_UNI_NAME("Alnum"));
- case _C_C_T_(ALPHA, isALPHA(value), POSIX_CC_UNI_NAME("Alpha"));
- case _C_C_T_(BLANK, isBLANK(value), POSIX_CC_UNI_NAME("Blank"));
- case _C_C_T_(CNTRL, isCNTRL(value), POSIX_CC_UNI_NAME("Cntrl"));
- case _C_C_T_(GRAPH, isGRAPH(value), POSIX_CC_UNI_NAME("Graph"));
- case _C_C_T_(LOWER, isLOWER(value), POSIX_CC_UNI_NAME("Lower"));
- case _C_C_T_(PRINT, isPRINT(value), POSIX_CC_UNI_NAME("Print"));
- case _C_C_T_(PSXSPC, isPSXSPC(value), POSIX_CC_UNI_NAME("Space"));
- case _C_C_T_(PUNCT, isPUNCT(value), POSIX_CC_UNI_NAME("Punct"));
- case _C_C_T_(UPPER, isUPPER(value), POSIX_CC_UNI_NAME("Upper"));
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
- case _C_C_T_(ALNUM, isALNUM(value), "Word");
- case _C_C_T_(SPACE, isSPACE(value), "SpacePerl");
-#else
- case _C_C_T_(SPACE, isSPACE(value), "PerlSpace");
- case _C_C_T_(ALNUM, isALNUM(value), "PerlWord");
-#endif
- case _C_C_T_(XDIGIT, isXDIGIT(value), "XDigit");
- case _C_C_T_NOLOC_(VERTWS, is_VERTWS_latin1(&value), "VertSpace");
- case _C_C_T_NOLOC_(HORIZWS, is_HORIZWS_latin1(&value), "HorizSpace");
- case ANYOF_ASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_ASCII);
- else {
-#ifndef EBCDIC
- for (value = 0; value < 128; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '+';
- what = "ASCII";
- break;
- case ANYOF_NASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NASCII);
- else {
-#ifndef EBCDIC
- for (value = 128; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (!isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '!';
- what = "ASCII";
- break;
- case ANYOF_DIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_DIGIT);
- else {
- /* consecutive digits assumed */
- for (value = '0'; value <= '9'; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '+';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_NDIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NDIGIT);
- else {
- /* consecutive digits assumed */
- for (value = 0; value < '0'; value++)
- ANYOF_BITMAP_SET(ret, value);
- for (value = '9' + 1; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '!';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_MAX:
- /* this is to handle \p and \P */
- break;
- default:
- vFAIL("Invalid [::] class");
- break;
- }
- if (what) {
- /* Strings such as "+utf8::isWord\n" */
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::Is%s\n", yesno, what);
- }
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_CLASS;
- continue;
- }
- } /* end of namedclass \blah */
-
- if (range) {
- if (prevvalue > (IV)value) /* b-a */ {
- const int w = RExC_parse - rangebegin;
- Simple_vFAIL4("Invalid [] range \"%*.*s\"", w, w, rangebegin);
- range = 0; /* not a valid range */
- }
- }
- else {
- prevvalue = value; /* save the beginning of the range */
- if (*RExC_parse == '-' && RExC_parse+1 < RExC_end &&
- RExC_parse[1] != ']') {
- RExC_parse++;
-
- /* a bad range like \w-, [:word:]- ? */
- if (namedclass > OOB_NAMEDCLASS) {
- if (ckWARN(WARN_REGEXP)) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- vWARN4(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
- }
- if (!SIZE_ONLY)
- ANYOF_BITMAP_SET(ret, '-');
- } else
- range = 1; /* yeah, it's a range! */
- continue; /* but do it the next time */
- }
- }
-
- /* now is the next time */
- /*stored += (value - prevvalue + 1);*/
- if (!SIZE_ONLY) {
- if (prevvalue < 256) {
- const IV ceilvalue = value < 256 ? value : 255;
- IV i;
-#ifdef EBCDIC
- /* In EBCDIC [\x89-\x91] should include
- * the \x8e but [i-j] should not. */
- if (literal_endpoint == 2 &&
- ((isLOWER(prevvalue) && isLOWER(ceilvalue)) ||
- (isUPPER(prevvalue) && isUPPER(ceilvalue))))
- {
- if (isLOWER(prevvalue)) {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isLOWER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- } else {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isUPPER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- else
-#endif
- for (i = prevvalue; i <= ceilvalue; i++) {
- if (!ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- if (value > 255 || UTF) {
- const UV prevnatvalue = NATIVE_TO_UNI(prevvalue);
- const UV natvalue = NATIVE_TO_UNI(value);
- stored+=2; /* can't optimize this class */
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- if (prevnatvalue < natvalue) { /* what about > ? */
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n",
- prevnatvalue, natvalue);
- }
- else if (prevnatvalue == natvalue) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", natvalue);
- if (FOLD) {
- U8 foldbuf[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const UV f = to_uni_fold(natvalue, foldbuf, &foldlen);
-
-#ifdef EBCDIC /* RD t/uni/fold ff and 6b */
- if (RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xDF || f == 0x92)) {
- f = NATIVE_TO_UNI(f);
- }
-#endif
- /* If folding and foldable and a single
- * character, insert also the folded version
- * to the charclass. */
- if (f != value) {
-#ifdef EBCDIC /* RD tunifold ligatures s,t fb05, fb06 */
- if ((RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xA2 &&
- (value == 0xFB05 || value == 0xFB06))) ?
- foldlen == ((STRLEN)UNISKIP(f) - 1) :
- foldlen == (STRLEN)UNISKIP(f) )
-#else
- if (foldlen == (STRLEN)UNISKIP(f))
-#endif
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n", f);
- else {
- /* Any multicharacter foldings
- * require the following transform:
- * [ABCDEF] -> (?:[ABCabcDEFd]|pq|rst)
- * where E folds into "pq" and F folds
- * into "rst", all other characters
- * fold to single characters. We save
- * away these multicharacter foldings,
- * to be later saved as part of the
- * additional "s" data. */
- SV *sv;
-
- if (!unicode_alternate)
- unicode_alternate = newAV();
- sv = newSVpvn_utf8((char*)foldbuf, foldlen,
- TRUE);
- av_push(unicode_alternate, sv);
- }
- }
-
- /* If folding and the value is one of the Greek
- * sigmas insert a few more sigmas to make the
- * folding rules of the sigmas to work right.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (literal or EXACTF cases) are handled
- * during runtime in regexec.c:S_find_byclass(). */
- if (value == UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA);
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- else if (value == UNICODE_GREEK_CAPITAL_LETTER_SIGMA)
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- }
- }
-#ifdef EBCDIC
- literal_endpoint = 0;
-#endif
- }
-
- range = 0; /* this range (if it was one) is done now */
- }
-
- if (need_class) {
- ANYOF_FLAGS(ret) |= ANYOF_LARGE;
- if (SIZE_ONLY)
- RExC_size += ANYOF_CLASS_ADD_SKIP;
- else
- RExC_emit += ANYOF_CLASS_ADD_SKIP;
- }
-
-
- if (SIZE_ONLY)
- return ret;
- /****** !SIZE_ONLY AFTER HERE *********/
-
- if( stored == 1 && (value < 128 || (value < 256 && !UTF))
- && !( ANYOF_FLAGS(ret) & ( ANYOF_FLAGS_ALL ^ ANYOF_FOLD ) )
- ) {
- /* optimize single char class to an EXACT node
- but *only* when its not a UTF/high char */
- const char * cur_parse= RExC_parse;
- RExC_emit = (regnode *)orig_emit;
- RExC_parse = (char *)orig_parse;
- ret = reg_node(pRExC_state,
- (U8)((ANYOF_FLAGS(ret) & ANYOF_FOLD) ? EXACTF : EXACT));
- RExC_parse = (char *)cur_parse;
- *STRING(ret)= (char)value;
- STR_LEN(ret)= 1;
- RExC_emit += STR_SZ(1);
- SvREFCNT_dec(listsv);
- return ret;
- }
- /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */
- if ( /* If the only flag is folding (plus possibly inversion). */
- ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD)
- ) {
- for (value = 0; value < 256; ++value) {
- if (ANYOF_BITMAP_TEST(ret, value)) {
- UV fold = PL_fold[value];
-
- if (fold != value)
- ANYOF_BITMAP_SET(ret, fold);
- }
- }
- ANYOF_FLAGS(ret) &= ~ANYOF_FOLD;
- }
-
- /* optimize inverted simple patterns (e.g. [^a-z]) */
- if (optimize_invert &&
- /* If the only flag is inversion. */
- (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) {
- for (value = 0; value < ANYOF_BITMAP_SIZE; ++value)
- ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL;
- ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL;
- }
- {
- AV * const av = newAV();
- SV *rv;
- /* The 0th element stores the character class description
- * in its textual form: used later (regexec.c:Perl_regclass_swash())
- * to initialize the appropriate swash (which gets stored in
- * the 1st element), and also useful for dumping the regnode.
- * The 2nd element stores the multicharacter foldings,
- * used later (regexec.c:S_reginclass()). */
- av_store(av, 0, listsv);
- av_store(av, 1, NULL);
- av_store(av, 2, MUTABLE_SV(unicode_alternate));
- rv = newRV_noinc(MUTABLE_SV(av));
- n = add_data(pRExC_state, 1, "s");
- RExC_rxi->data->data[n] = (void*)rv;
- ARG_SET(ret, n);
- }
- return ret;
-}
-#undef _C_C_T_
-
-
-/* reg_skipcomment()
-
- Absorbs an /x style # comments from the input stream.
- Returns true if there is more text remaining in the stream.
- Will set the REG_SEEN_RUN_ON_COMMENT flag if the comment
- terminates the pattern without including a newline.
-
- Note its the callers responsibility to ensure that we are
- actually in /x mode
-
-*/
-
-STATIC bool
-S_reg_skipcomment(pTHX_ RExC_state_t *pRExC_state)
-{
- bool ended = 0;
-
- PERL_ARGS_ASSERT_REG_SKIPCOMMENT;
-
- while (RExC_parse < RExC_end)
- if (*RExC_parse++ == '\n') {
- ended = 1;
- break;
- }
- if (!ended) {
- /* we ran off the end of the pattern without ending
- the comment, so we have to add an \n when wrapping */
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- return 0;
- } else
- return 1;
-}
-
-/* nextchar()
-
- Advance that parse position, and optionall absorbs
- "whitespace" from the inputstream.
-
- Without /x "whitespace" means (?#...) style comments only,
- with /x this means (?#...) and # comments and whitespace proper.
-
- Returns the RExC_parse point from BEFORE the scan occurs.
-
- This is the /x friendly way of saying RExC_parse++.
-*/
-
-STATIC char*
-S_nextchar(pTHX_ RExC_state_t *pRExC_state)
-{
- char* const retval = RExC_parse++;
-
- PERL_ARGS_ASSERT_NEXTCHAR;
-
- for (;;) {
- if (*RExC_parse == '(' && RExC_parse[1] == '?' &&
- RExC_parse[2] == '#') {
- while (*RExC_parse != ')') {
- if (RExC_parse == RExC_end)
- FAIL("Sequence (?#... not terminated");
- RExC_parse++;
- }
- RExC_parse++;
- continue;
- }
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if (isSPACE(*RExC_parse)) {
- RExC_parse++;
- continue;
- }
- else if (*RExC_parse == '#') {
- if ( reg_skipcomment( pRExC_state ) )
- continue;
- }
- }
- return retval;
- }
-}
-
-/*
-- reg_node - emit a node
-*/
-STATIC regnode * /* Location. */
-S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 1;
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE(ptr, op);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s:%d: (op %s) %s %"UVuf" (len %"UVuf") (max %"UVuf").\n",
- "reg_node", __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(RExC_emit, RExC_parse + (op == END));
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reganode - emit a node with an argument
-*/
-STATIC regnode * /* Location. */
-S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGANODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 2;
- /*
- We can't do this:
-
- assert(2==regarglen[op]+1);
-
- Anything larger than this has to allocate the extra amount.
- If we changed this to be:
-
- RExC_size += (1 + regarglen[op]);
-
- then it wouldn't matter. Its not clear what side effect
- might come from that so its not done so far.
- -- dmq
- */
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE_ARG(ptr, op, arg);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reganode",
- __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] ?
- "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Cur_Node_Offset;
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reguni - emit (if appropriate) a Unicode character
-*/
-STATIC STRLEN
-S_reguni(pTHX_ const RExC_state_t *pRExC_state, UV uv, char* s)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGUNI;
-
- return SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s);
-}
-
-/*
-- reginsert - insert an operator in front of already-emitted operand
-*
-* Means relocating the operand.
-*/
-STATIC void
-S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd, U32 depth)
-{
- dVAR;
- register regnode *src;
- register regnode *dst;
- register regnode *place;
- const int offset = regarglen[(U8)op];
- const int size = NODE_STEP_REGNODE + offset;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGINSERT;
- PERL_UNUSED_ARG(depth);
-/* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */
- DEBUG_PARSE_FMT("inst"," - %s",PL_reg_name[op]);
- if (SIZE_ONLY) {
- RExC_size += size;
- return;
- }
-
- src = RExC_emit;
- RExC_emit += size;
- dst = RExC_emit;
- if (RExC_open_parens) {
- int paren;
- /*DEBUG_PARSE_FMT("inst"," - %"IVdf, (IV)RExC_npar);*/
- for ( paren=0 ; paren < RExC_npar ; paren++ ) {
- if ( RExC_open_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("open"," - %d",size);*/
- RExC_open_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("open"," - %s","ok");*/
- }
- if ( RExC_close_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("close"," - %d",size);*/
- RExC_close_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("close"," - %s","ok");*/
- }
- }
- }
-
- while (src > opnd) {
- StructCopy(--src, --dst, regnode);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD 20010112 */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s copy %"UVuf" -> %"UVuf" (max %"UVuf").\n",
- "reg_insert",
- __LINE__,
- PL_reg_name[op],
- (UV)(dst - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(src - RExC_emit_start),
- (UV)(dst - RExC_emit_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src));
- Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src));
- }
-#endif
- }
-
-
- place = opnd; /* Op node, where operand used to be. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reginsert",
- __LINE__,
- PL_reg_name[op],
- (UV)(place - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(place - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(place, RExC_parse);
- Set_Node_Length(place, 1);
- }
-#endif
- src = NEXTOPER(place);
- FILL_ADVANCE_NODE(place, op);
- Zero(src, offset, regnode);
-}
-
-/*
-- regtail - set the next-pointer at the end of a node chain of p to val.
-- SEE ALSO: regtail_study
-*/
-/* TODO: All three parms should be const */
-STATIC void
-S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- if (SIZE_ONLY)
- return;
-
- /* Find last node. */
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tail" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) %s %s\n",
- SvPV_nolen_const(mysv), REG_NODE_NUM(scan),
- (temp == NULL ? "->" : ""),
- (temp == NULL ? PL_reg_name[OP(val)] : "")
- );
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
-
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-}
-
-#ifdef DEBUGGING
-/*
-- regtail_study - set the next-pointer at the end of a node chain of p to val.
-- Look for optimizable sequences at the same time.
-- currently only looks for EXACT chains.
-
-This is expermental code. The idea is to use this routine to perform
-in place optimizations on branches and groups as they are constructed,
-with the long term intention of removing optimization from study_chunk so
-that it is purely analytical.
-
-Currently only used when in DEBUG mode. The macro REGTAIL_STUDY() is used
-to control which is which.
-
-*/
-/* TODO: All four parms should be const */
-
-STATIC U8
-S_regtail_study(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- U8 exact = PSEUDO;
-#ifdef EXPERIMENTAL_INPLACESCAN
- I32 min = 0;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL_STUDY;
-
-
- if (SIZE_ONLY)
- return exact;
-
- /* Find last node. */
-
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (PL_regkind[OP(scan)] == EXACT)
- if (join_exact(pRExC_state,scan,&min,1,val,depth+1))
- return EXACT;
-#endif
- if ( exact ) {
- switch (OP(scan)) {
- case EXACT:
- case EXACTF:
- case EXACTFL:
- if( exact == PSEUDO )
- exact= OP(scan);
- else if ( exact != OP(scan) )
- exact= 0;
- case NOTHING:
- break;
- default:
- exact= 0;
- }
- }
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tsdy" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) -> %s\n",
- SvPV_nolen_const(mysv),
- REG_NODE_NUM(scan),
- PL_reg_name[exact]);
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
- DEBUG_PARSE_r({
- SV * const mysv_val=sv_newmortal();
- DEBUG_PARSE_MSG("");
- regprop(RExC_rx, mysv_val, val);
- PerlIO_printf(Perl_debug_log, "~ attach to %s (%"IVdf") offset to %"IVdf"\n",
- SvPV_nolen_const(mysv_val),
- (IV)REG_NODE_NUM(val),
- (IV)(val - scan)
- );
- });
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-
- return exact;
-}
-#endif
-
-/*
- - regcurly - a little FSA that accepts {\d+,?\d*}
- */
-STATIC I32
-S_regcurly(register const char *s)
-{
- PERL_ARGS_ASSERT_REGCURLY;
-
- if (*s++ != '{')
- return FALSE;
- if (!isDIGIT(*s))
- return FALSE;
- while (isDIGIT(*s))
- s++;
- if (*s == ',')
- s++;
- while (isDIGIT(*s))
- s++;
- if (*s != '}')
- return FALSE;
- return TRUE;
-}
-
-
-/*
- - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form
- */
-#ifdef DEBUGGING
-static void
-S_regdump_extflags(pTHX_ const char *lead, const U32 flags)
-{
- int bit;
- int set=0;
-
- for (bit=0; bit<32; bit++) {
- if (flags & (1<<bit)) {
- if (!set++ && lead)
- PerlIO_printf(Perl_debug_log, "%s",lead);
- PerlIO_printf(Perl_debug_log, "%s ",PL_reg_extflags_name[bit]);
- }
- }
- if (lead) {
- if (set)
- PerlIO_printf(Perl_debug_log, "\n");
- else
- PerlIO_printf(Perl_debug_log, "%s[none-set]\n",lead);
- }
-}
-#endif
-
-void
-Perl_regdump(pTHX_ const regexp *r)
-{
-#ifdef DEBUGGING
- dVAR;
- SV * const sv = sv_newmortal();
- SV *dsv= sv_newmortal();
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGDUMP;
-
- (void)dumpuntil(r, ri->program, ri->program + 1, NULL, NULL, sv, 0, 0);
-
- /* Header fields of interest. */
- if (r->anchored_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->anchored_substr),
- RE_SV_DUMPLEN(r->anchored_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_substr),
- (IV)r->anchored_offset);
- } else if (r->anchored_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->anchored_utf8),
- RE_SV_DUMPLEN(r->anchored_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored utf8 %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_utf8),
- (IV)r->anchored_offset);
- }
- if (r->float_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->float_substr),
- RE_SV_DUMPLEN(r->float_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "floating %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_substr),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- } else if (r->float_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->float_utf8),
- RE_SV_DUMPLEN(r->float_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "floating utf8 %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_utf8),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- }
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log,
- (const char *)
- (r->check_substr == r->float_substr
- && r->check_utf8 == r->float_utf8
- ? "(checking floating" : "(checking anchored"));
- if (r->extflags & RXf_NOSCAN)
- PerlIO_printf(Perl_debug_log, " noscan");
- if (r->extflags & RXf_CHECK_ALL)
- PerlIO_printf(Perl_debug_log, " isall");
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log, ") ");
-
- if (ri->regstclass) {
- regprop(r, sv, ri->regstclass);
- PerlIO_printf(Perl_debug_log, "stclass %s ", SvPVX_const(sv));
- }
- if (r->extflags & RXf_ANCH) {
- PerlIO_printf(Perl_debug_log, "anchored");
- if (r->extflags & RXf_ANCH_BOL)
- PerlIO_printf(Perl_debug_log, "(BOL)");
- if (r->extflags & RXf_ANCH_MBOL)
- PerlIO_printf(Perl_debug_log, "(MBOL)");
- if (r->extflags & RXf_ANCH_SBOL)
- PerlIO_printf(Perl_debug_log, "(SBOL)");
- if (r->extflags & RXf_ANCH_GPOS)
- PerlIO_printf(Perl_debug_log, "(GPOS)");
- PerlIO_putc(Perl_debug_log, ' ');
- }
- if (r->extflags & RXf_GPOS_SEEN)
- PerlIO_printf(Perl_debug_log, "GPOS:%"UVuf" ", (UV)r->gofs);
- if (r->intflags & PREGf_SKIP)
- PerlIO_printf(Perl_debug_log, "plus ");
- if (r->intflags & PREGf_IMPLICIT)
- PerlIO_printf(Perl_debug_log, "implicit ");
- PerlIO_printf(Perl_debug_log, "minlen %"IVdf" ", (IV)r->minlen);
- if (r->extflags & RXf_EVAL_SEEN)
- PerlIO_printf(Perl_debug_log, "with eval ");
- PerlIO_printf(Perl_debug_log, "\n");
- DEBUG_FLAGS_r(regdump_extflags("r->extflags: ",r->extflags));
-#else
- PERL_ARGS_ASSERT_REGDUMP;
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(r);
-#endif /* DEBUGGING */
-}
-
-/*
-- regprop - printable representation of opcode
-*/
-#define EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags) \
-STMT_START { \
- if (do_sep) { \
- Perl_sv_catpvf(aTHX_ sv,"%s][%s",PL_colors[1],PL_colors[0]); \
- if (flags & ANYOF_INVERT) \
- /*make sure the invert info is in each */ \
- sv_catpvs(sv, "^"); \
- do_sep = 0; \
- } \
-} STMT_END
-
-void
-Perl_regprop(pTHX_ const regexp *prog, SV *sv, const regnode *o)
-{
-#ifdef DEBUGGING
- dVAR;
- register int k;
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPROP;
-
- sv_setpvs(sv, "");
-
- if (OP(o) > REGNODE_MAX) /* regnode.type is unsigned */
- /* It would be nice to FAIL() here, but this may be called from
- regexec.c, and it would be hard to supply pRExC_state. */
- Perl_croak(aTHX_ "Corrupted regexp opcode %d > %d", (int)OP(o), (int)REGNODE_MAX);
- sv_catpv(sv, PL_reg_name[OP(o)]); /* Take off const! */
-
- k = PL_regkind[OP(o)];
-
- if (k == EXACT) {
- sv_catpvs(sv, " ");
- /* Using is_utf8_string() (via PERL_PV_UNI_DETECT)
- * is a crude hack but it may be the best for now since
- * we have no flag "this EXACTish node was UTF-8"
- * --jhi */
- pv_pretty(sv, STRING(o), STR_LEN(o), 60, PL_colors[0], PL_colors[1],
- PERL_PV_ESCAPE_UNI_DETECT |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT |
- PERL_PV_PRETTY_NOCLEAR
- );
- } else if (k == TRIE) {
- /* print the details of the trie in dumpuntil instead, as
- * progi->data isn't available here */
- const char op = OP(o);
- const U32 n = ARG(o);
- const reg_ac_data * const ac = IS_TRIE_AC(op) ?
- (reg_ac_data *)progi->data->data[n] :
- NULL;
- const reg_trie_data * const trie
- = (reg_trie_data*)progi->data->data[!IS_TRIE_AC(op) ? n : ac->trie];
-
- Perl_sv_catpvf(aTHX_ sv, "-%s",PL_reg_name[o->flags]);
- DEBUG_TRIE_COMPILE_r(
- Perl_sv_catpvf(aTHX_ sv,
- "<S:%"UVuf"/%"IVdf" W:%"UVuf" L:%"UVuf"/%"UVuf" C:%"UVuf"/%"UVuf">",
- (UV)trie->startstate,
- (IV)trie->statecount-1, /* -1 because of the unused 0 element */
- (UV)trie->wordcount,
- (UV)trie->minlen,
- (UV)trie->maxlen,
- (UV)TRIE_CHARCOUNT(trie),
- (UV)trie->uniquecharcount
- )
- );
- if ( IS_ANYOF_TRIE(op) || trie->bitmap ) {
- int i;
- int rangestart = -1;
- U8* bitmap = IS_ANYOF_TRIE(op) ? (U8*)ANYOF_BITMAP(o) : (U8*)TRIE_BITMAP(trie);
- sv_catpvs(sv, "[");
- for (i = 0; i <= 256; i++) {
- if (i < 256 && BITMAP_TEST(bitmap,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- rangestart = -1;
- }
- }
- sv_catpvs(sv, "]");
- }
-
- } else if (k == CURLY) {
- if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */
- Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o));
- }
- else if (k == WHILEM && o->flags) /* Ordinal/of */
- Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4);
- else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP || OP(o)==ACCEPT) {
- Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */
- if ( RXp_PAREN_NAMES(prog) ) {
- if ( k != REF || OP(o) < NREF) {
- AV *list= MUTABLE_AV(progi->data->data[progi->name_list_idx]);
- SV **name= av_fetch(list, ARG(o), 0 );
- if (name)
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- else {
- AV *list= MUTABLE_AV(progi->data->data[ progi->name_list_idx ]);
- SV *sv_dat= MUTABLE_SV(progi->data->data[ ARG( o ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
- SV **name= av_fetch(list, nums[0], 0 );
- I32 n;
- if (name) {
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- Perl_sv_catpvf(aTHX_ sv, "%s%"IVdf,
- (n ? "," : ""), (IV)nums[n]);
- }
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- }
- }
- } else if (k == GOSUB)
- Perl_sv_catpvf(aTHX_ sv, "%d[%+d]", (int)ARG(o),(int)ARG2L(o)); /* Paren and offset */
- else if (k == VERB) {
- if (!o->flags)
- Perl_sv_catpvf(aTHX_ sv, ":%"SVf,
- SVfARG((MUTABLE_SV(progi->data->data[ ARG( o ) ]))));
- } else if (k == LOGICAL)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */
- else if (k == FOLDCHAR)
- Perl_sv_catpvf(aTHX_ sv, "[0x%"UVXf"]", PTR2UV(ARG(o)) );
- else if (k == ANYOF) {
- int i, rangestart = -1;
- const U8 flags = ANYOF_FLAGS(o);
- int do_sep = 0;
-
- /* Should be synchronized with * ANYOF_ #xdefines in regcomp.h */
- static const char * const anyofs[] = {
- "\\w",
- "\\W",
- "\\s",
- "\\S",
- "\\d",
- "\\D",
- "[:alnum:]",
- "[:^alnum:]",
- "[:alpha:]",
- "[:^alpha:]",
- "[:ascii:]",
- "[:^ascii:]",
- "[:cntrl:]",
- "[:^cntrl:]",
- "[:graph:]",
- "[:^graph:]",
- "[:lower:]",
- "[:^lower:]",
- "[:print:]",
- "[:^print:]",
- "[:punct:]",
- "[:^punct:]",
- "[:upper:]",
- "[:^upper:]",
- "[:xdigit:]",
- "[:^xdigit:]",
- "[:space:]",
- "[:^space:]",
- "[:blank:]",
- "[:^blank:]"
- };
-
- if (flags & ANYOF_LOCALE)
- sv_catpvs(sv, "{loc}");
- if (flags & ANYOF_FOLD)
- sv_catpvs(sv, "{i}");
- Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]);
- if (flags & ANYOF_INVERT)
- sv_catpvs(sv, "^");
-
- /* output what the standard cp 0-255 bitmap matches */
- for (i = 0; i <= 256; i++) {
- if (i < 256 && ANYOF_BITMAP_TEST(o,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- do_sep = 1;
- rangestart = -1;
- }
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
- /* output any special charclass tests (used mostly under use locale) */
- if (o->flags & ANYOF_CLASS)
- for (i = 0; i < (int)(sizeof(anyofs)/sizeof(char*)); i++)
- if (ANYOF_CLASS_TEST(o,i)) {
- sv_catpv(sv, anyofs[i]);
- do_sep = 1;
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
-
- /* output information about the unicode matching */
- if (flags & ANYOF_UNICODE)
- sv_catpvs(sv, "{unicode}");
- else if (flags & ANYOF_UNICODE_ALL)
- sv_catpvs(sv, "{unicode_all}");
-
- {
- SV *lv;
- SV * const sw = regclass_swash(prog, o, FALSE, &lv, 0);
-
- if (lv) {
- if (sw) {
- U8 s[UTF8_MAXBYTES_CASE+1];
-
- for (i = 0; i <= 256; i++) { /* just the first 256 */
- uvchr_to_utf8(s, i);
-
- if (i < 256 && swash_fetch(sw, s, TRUE)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++) {
- const U8 * const e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for(p = s; p < e; p++)
- put_byte(sv, *p);
- }
- else {
- const U8 *e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- sv_catpvs(sv, "-");
- e = uvchr_to_utf8(s, i-1);
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- }
- rangestart = -1;
- }
- }
-
- sv_catpvs(sv, "..."); /* et cetera */
- }
-
- {
- char *s = savesvpv(lv);
- char * const origs = s;
-
- while (*s && *s != '\n')
- s++;
-
- if (*s == '\n') {
- const char * const t = ++s;
-
- while (*s) {
- if (*s == '\n')
- *s = ' ';
- s++;
- }
- if (s[-1] == ' ')
- s[-1] = 0;
-
- sv_catpv(sv, t);
- }
-
- Safefree(origs);
- }
- }
- }
-
- Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]);
- }
- else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH))
- Perl_sv_catpvf(aTHX_ sv, "[%d]", -(o->flags));
-#else
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(sv);
- PERL_UNUSED_ARG(o);
- PERL_UNUSED_ARG(prog);
-#endif /* DEBUGGING */
-}
-
-SV *
-Perl_re_intuit_string(pTHX_ REGEXP * const r)
-{ /* Assume that RE_INTUIT is set */
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_STRING;
- PERL_UNUSED_CONTEXT;
-
- DEBUG_COMPILE_r(
- {
- const char * const s = SvPV_nolen_const(prog->check_substr
- ? prog->check_substr : prog->check_utf8);
-
- if (!PL_colorset) reginitcolors();
- PerlIO_printf(Perl_debug_log,
- "%sUsing REx %ssubstr:%s \"%s%.60s%s%s\"\n",
- PL_colors[4],
- prog->check_substr ? "" : "utf8 ",
- PL_colors[5],PL_colors[0],
- s,
- PL_colors[1],
- (strlen(s) > 60 ? "..." : ""));
- } );
-
- return prog->check_substr ? prog->check_substr : prog->check_utf8;
-}
-
-/*
- pregfree()
-
- handles refcounting and freeing the perl core regexp structure. When
- it is necessary to actually free the structure the first thing it
- does is call the 'free' method of the regexp_engine associated to to
- the regexp, allowing the handling of the void *pprivate; member
- first. (This routine is not overridable by extensions, which is why
- the extensions free is called first.)
-
- See regdupe and regdupe_internal if you change anything here.
-*/
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_pregfree(pTHX_ REGEXP *r)
-{
- SvREFCNT_dec(r);
-}
-
-void
-Perl_pregfree2(pTHX_ REGEXP *rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_PREGFREE2;
-
- if (r->mother_re) {
- ReREFCNT_dec(r->mother_re);
- } else {
- CALLREGFREE_PVT(rx); /* free the private data */
- SvREFCNT_dec(RXp_PAREN_NAMES(r));
- }
- if (r->substrs) {
- SvREFCNT_dec(r->anchored_substr);
- SvREFCNT_dec(r->anchored_utf8);
- SvREFCNT_dec(r->float_substr);
- SvREFCNT_dec(r->float_utf8);
- Safefree(r->substrs);
- }
- RX_MATCH_COPY_FREE(rx);
-#ifdef PERL_OLD_COPY_ON_WRITE
- SvREFCNT_dec(r->saved_copy);
-#endif
- Safefree(r->offs);
-}
-
-/* reg_temp_copy()
-
- This is a hacky workaround to the structural issue of match results
- being stored in the regexp structure which is in turn stored in
- PL_curpm/PL_reg_curpm. The problem is that due to qr// the pattern
- could be PL_curpm in multiple contexts, and could require multiple
- result sets being associated with the pattern simultaneously, such
- as when doing a recursive match with (??{$qr})
-
- The solution is to make a lightweight copy of the regexp structure
- when a qr// is returned from the code executed by (??{$qr}) this
- lightweight copy doesnt actually own any of its data except for
- the starp/end and the actual regexp structure itself.
-
-*/
-
-
-REGEXP *
-Perl_reg_temp_copy (pTHX_ REGEXP *ret_x, REGEXP *rx)
-{
- struct regexp *ret;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- register const I32 npar = r->nparens+1;
-
- PERL_ARGS_ASSERT_REG_TEMP_COPY;
-
- if (!ret_x)
- ret_x = (REGEXP*) newSV_type(SVt_REGEXP);
- ret = (struct regexp *)SvANY(ret_x);
-
- (void)ReREFCNT_inc(rx);
- /* We can take advantage of the existing "copied buffer" mechanism in SVs
- by pointing directly at the buffer, but flagging that the allocated
- space in the copy is zero. As we've just done a struct copy, it's now
- a case of zero-ing that, rather than copying the current length. */
- SvPV_set(ret_x, RX_WRAPPED(rx));
- SvFLAGS(ret_x) |= SvFLAGS(rx) & (SVf_POK|SVp_POK|SVf_UTF8);
- memcpy(&(ret->xpv_cur), &(r->xpv_cur),
- sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur));
- SvLEN_set(ret_x, 0);
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if (r->substrs) {
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- SvREFCNT_inc_void(ret->anchored_substr);
- SvREFCNT_inc_void(ret->anchored_utf8);
- SvREFCNT_inc_void(ret->float_substr);
- SvREFCNT_inc_void(ret->float_utf8);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
- }
- RX_MATCH_COPIED_off(ret_x);
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
- ret->mother_re = rx;
-
- return ret_x;
-}
-#endif
-
-/* regfree_internal()
-
- Free the private data in a regexp. This is overloadable by
- extensions. Perl takes care of the regexp structure in pregfree(),
- this covers the *pprivate pointer which technically perldoesnt
- know about, however of course we have to handle the
- regexp_internal structure when no extension is in use.
-
- Note this is called before freeing anything in the regexp
- structure.
- */
-
-void
-Perl_regfree_internal(pTHX_ REGEXP * const rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGFREE_INTERNAL;
-
- DEBUG_COMPILE_r({
- if (!PL_colorset)
- reginitcolors();
- {
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RX_UTF8(rx),
- dsv, RX_PRECOMP(rx), RX_PRELEN(rx), 60);
- PerlIO_printf(Perl_debug_log,"%sFreeing REx:%s %s\n",
- PL_colors[4],PL_colors[5],s);
- }
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets)
- Safefree(ri->u.offsets); /* 20010421 MJD */
-#endif
- if (ri->data) {
- int n = ri->data->count;
- PAD* new_comppad = NULL;
- PAD* old_comppad;
- PADOFFSET refcnt;
-
- while (--n >= 0) {
- /* If you add a ->what type here, update the comment in regcomp.h */
- switch (ri->data->what[n]) {
- case 's':
- case 'S':
- case 'u':
- SvREFCNT_dec(MUTABLE_SV(ri->data->data[n]));
- break;
- case 'f':
- Safefree(ri->data->data[n]);
- break;
- case 'p':
- new_comppad = MUTABLE_AV(ri->data->data[n]);
- break;
- case 'o':
- if (new_comppad == NULL)
- Perl_croak(aTHX_ "panic: pregfree comppad");
- PAD_SAVE_LOCAL(old_comppad,
- /* Watch out for global destruction's random ordering. */
- (SvTYPE(new_comppad) == SVt_PVAV) ? new_comppad : NULL
- );
- OP_REFCNT_LOCK;
- refcnt = OpREFCNT_dec((OP_4tree*)ri->data->data[n]);
- OP_REFCNT_UNLOCK;
- if (!refcnt)
- op_free((OP_4tree*)ri->data->data[n]);
-
- PAD_RESTORE_LOCAL(old_comppad);
- SvREFCNT_dec(MUTABLE_SV(new_comppad));
- new_comppad = NULL;
- break;
- case 'n':
- break;
- case 'T':
- { /* Aho Corasick add-on structure for a trie node.
- Used in stclass optimization only */
- U32 refcount;
- reg_ac_data *aho=(reg_ac_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --aho->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(aho->states);
- PerlMemShared_free(aho->fail);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- PerlMemShared_free(ri->regstclass);
- }
- }
- break;
- case 't':
- {
- /* trie structure. */
- U32 refcount;
- reg_trie_data *trie=(reg_trie_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --trie->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(trie->charmap);
- PerlMemShared_free(trie->states);
- PerlMemShared_free(trie->trans);
- if (trie->bitmap)
- PerlMemShared_free(trie->bitmap);
- if (trie->wordlen)
- PerlMemShared_free(trie->wordlen);
- if (trie->jump)
- PerlMemShared_free(trie->jump);
- if (trie->nextword)
- PerlMemShared_free(trie->nextword);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- }
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: regfree data code '%c'", ri->data->what[n]);
- }
- }
- Safefree(ri->data->what);
- Safefree(ri->data);
- }
-
- Safefree(ri);
-}
-
-#define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
-#define av_dup_inc(s,t) MUTABLE_AV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define hv_dup_inc(s,t) MUTABLE_HV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define SAVEPVN(p,n) ((p) ? savepvn(p,n) : NULL)
-
-/*
- re_dup - duplicate a regexp.
-
- This routine is expected to clone a given regexp structure. It is only
- compiled under USE_ITHREADS.
-
- After all of the core data stored in struct regexp is duplicated
- the regexp_engine.dupe method is used to copy any private data
- stored in the *pprivate pointer. This allows extensions to handle
- any duplication it needs to do.
-
- See pregfree() and regfree_internal() if you change anything here.
-*/
-#if defined(USE_ITHREADS)
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_re_dup_guts(pTHX_ const REGEXP *sstr, REGEXP *dstr, CLONE_PARAMS *param)
-{
- dVAR;
- I32 npar;
- const struct regexp *r = (const struct regexp *)SvANY(sstr);
- struct regexp *ret = (struct regexp *)SvANY(dstr);
-
- PERL_ARGS_ASSERT_RE_DUP_GUTS;
-
- npar = r->nparens+1;
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if(ret->swap) {
- /* no need to copy these */
- Newx(ret->swap, npar, regexp_paren_pair);
- }
-
- if (ret->substrs) {
- /* Do it this way to avoid reading from *r after the StructCopy().
- That way, if any of the sv_dup_inc()s dislodge *r from the L1
- cache, it doesn't matter. */
- const bool anchored = r->check_substr
- ? r->check_substr == r->anchored_substr
- : r->check_utf8 == r->anchored_utf8;
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- ret->anchored_substr = sv_dup_inc(ret->anchored_substr, param);
- ret->anchored_utf8 = sv_dup_inc(ret->anchored_utf8, param);
- ret->float_substr = sv_dup_inc(ret->float_substr, param);
- ret->float_utf8 = sv_dup_inc(ret->float_utf8, param);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
-
- if (ret->check_substr) {
- if (anchored) {
- assert(r->check_utf8 == r->anchored_utf8);
- ret->check_substr = ret->anchored_substr;
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- assert(r->check_substr == r->float_substr);
- assert(r->check_utf8 == r->float_utf8);
- ret->check_substr = ret->float_substr;
- ret->check_utf8 = ret->float_utf8;
- }
- } else if (ret->check_utf8) {
- if (anchored) {
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- ret->check_utf8 = ret->float_utf8;
- }
- }
- }
-
- RXp_PAREN_NAMES(ret) = hv_dup_inc(RXp_PAREN_NAMES(ret), param);
-
- if (ret->pprivate)
- RXi_SET(ret,CALLREGDUPE_PVT(dstr,param));
-
- if (RX_MATCH_COPIED(dstr))
- ret->subbeg = SAVEPVN(ret->subbeg, ret->sublen);
- else
- ret->subbeg = NULL;
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
-
- if (ret->mother_re) {
- if (SvPVX_const(dstr) == SvPVX_const(ret->mother_re)) {
- /* Our storage points directly to our mother regexp, but that's
- 1: a buffer in a different thread
- 2: something we no longer hold a reference on
- so we need to copy it locally. */
- /* Note we need to sue SvCUR() on our mother_re, because it, in
- turn, may well be pointing to its own mother_re. */
- SvPV_set(dstr, SAVEPVN(SvPVX_const(ret->mother_re),
- SvCUR(ret->mother_re)+1));
- SvLEN_set(dstr, SvCUR(ret->mother_re)+1);
- }
- ret->mother_re = NULL;
- }
- ret->gofs = 0;
-}
-#endif /* PERL_IN_XSUB_RE */
-
-/*
- regdupe_internal()
-
- This is the internal complement to regdupe() which is used to copy
- the structure pointed to by the *pprivate pointer in the regexp.
- This is the core version of the extension overridable cloning hook.
- The regexp structure being duplicated will be copied by perl prior
- to this and will be provided as the regexp *r argument, however
- with the /old/ structures pprivate pointer value. Thus this routine
- may override any copying normally done by perl.
-
- It returns a pointer to the new regexp_internal structure.
-*/
-
-void *
-Perl_regdupe_internal(pTHX_ REGEXP * const rx, CLONE_PARAMS *param)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- regexp_internal *reti;
- int len, npar;
- RXi_GET_DECL(r,ri);
-
- PERL_ARGS_ASSERT_REGDUPE_INTERNAL;
-
- npar = r->nparens+1;
- len = ProgLen(ri);
-
- Newxc(reti, sizeof(regexp_internal) + len*sizeof(regnode), char, regexp_internal);
- Copy(ri->program, reti->program, len+1, regnode);
-
-
- reti->regstclass = NULL;
-
- if (ri->data) {
- struct reg_data *d;
- const int count = ri->data->count;
- int i;
-
- Newxc(d, sizeof(struct reg_data) + count*sizeof(void *),
- char, struct reg_data);
- Newx(d->what, count, U8);
-
- d->count = count;
- for (i = 0; i < count; i++) {
- d->what[i] = ri->data->what[i];
- switch (d->what[i]) {
- /* legal options are one of: sSfpontTu
- see also regcomp.h and pregfree() */
- case 's':
- case 'S':
- case 'p': /* actually an AV, but the dup function is identical. */
- case 'u': /* actually an HV, but the dup function is identical. */
- d->data[i] = sv_dup_inc((const SV *)ri->data->data[i], param);
- break;
- case 'f':
- /* This is cheating. */
- Newx(d->data[i], 1, struct regnode_charclass_class);
- StructCopy(ri->data->data[i], d->data[i],
- struct regnode_charclass_class);
- reti->regstclass = (regnode*)d->data[i];
- break;
- case 'o':
- /* Compiled op trees are readonly and in shared memory,
- and can thus be shared without duplication. */
- OP_REFCNT_LOCK;
- d->data[i] = (void*)OpREFCNT_inc((OP*)ri->data->data[i]);
- OP_REFCNT_UNLOCK;
- break;
- case 'T':
- /* Trie stclasses are readonly and can thus be shared
- * without duplication. We free the stclass in pregfree
- * when the corresponding reg_ac_data struct is freed.
- */
- reti->regstclass= ri->regstclass;
- /* Fall through */
- case 't':
- OP_REFCNT_LOCK;
- ((reg_trie_data*)ri->data->data[i])->refcount++;
- OP_REFCNT_UNLOCK;
- /* Fall through */
- case 'n':
- d->data[i] = ri->data->data[i];
- break;
- default:
- Perl_croak(aTHX_ "panic: re_dup unknown data code '%c'", ri->data->what[i]);
- }
- }
-
- reti->data = d;
- }
- else
- reti->data = NULL;
-
- reti->name_list_idx = ri->name_list_idx;
-
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets) {
- Newx(reti->u.offsets, 2*len+1, U32);
- Copy(ri->u.offsets, reti->u.offsets, 2*len+1, U32);
- }
-#else
- SetProgLen(reti,len);
-#endif
-
- return (void*)reti;
-}
-
-#endif /* USE_ITHREADS */
-
-#ifndef PERL_IN_XSUB_RE
-
-/*
- - regnext - dig the "next" pointer out of a node
- */
-regnode *
-Perl_regnext(pTHX_ register regnode *p)
-{
- dVAR;
- register I32 offset;
-
- if (!p)
- return(NULL);
-
- offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p));
- if (offset == 0)
- return(NULL);
-
- return(p+offset);
-}
-#endif
-
-STATIC void
-S_re_croak2(pTHX_ const char* pat1,const char* pat2,...)
-{
- va_list args;
- STRLEN l1 = strlen(pat1);
- STRLEN l2 = strlen(pat2);
- char buf[512];
- SV *msv;
- const char *message;
-
- PERL_ARGS_ASSERT_RE_CROAK2;
-
- if (l1 > 510)
- l1 = 510;
- if (l1 + l2 > 510)
- l2 = 510 - l1;
- Copy(pat1, buf, l1 , char);
- Copy(pat2, buf + l1, l2 , char);
- buf[l1 + l2] = '\n';
- buf[l1 + l2 + 1] = '\0';
-#ifdef I_STDARG
- /* ANSI variant takes additional second argument */
- va_start(args, pat2);
-#else
- va_start(args);
-#endif
- msv = vmess(buf, &args);
- va_end(args);
- message = SvPV_const(msv,l1);
- if (l1 > 512)
- l1 = 512;
- Copy(message, buf, l1 , char);
- buf[l1-1] = '\0'; /* Overwrite \n */
- Perl_croak(aTHX_ "%s", buf);
-}
-
-/* XXX Here's a total kludge. But we need to re-enter for swash routines. */
-
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_save_re_context(pTHX)
-{
- dVAR;
-
- struct re_save_state *state;
-
- SAVEVPTR(PL_curcop);
- SSGROW(SAVESTACK_ALLOC_FOR_RE_SAVE_STATE + 1);
-
- state = (struct re_save_state *)(PL_savestack + PL_savestack_ix);
- PL_savestack_ix += SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
- SSPUSHINT(SAVEt_RE_STATE);
-
- Copy(&PL_reg_state, state, 1, struct re_save_state);
-
- PL_reg_start_tmp = 0;
- PL_reg_start_tmpl = 0;
- PL_reg_oldsaved = NULL;
- PL_reg_oldsavedlen = 0;
- PL_reg_maxiter = 0;
- PL_reg_leftiter = 0;
- PL_reg_poscache = NULL;
- PL_reg_poscache_size = 0;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = NULL;
-#endif
-
- /* Save $1..$n (#18107: UTF-8 s/(\w+)/uc($1)/e); AMS 20021106. */
- if (PL_curpm) {
- const REGEXP * const rx = PM_GETRE(PL_curpm);
- if (rx) {
- U32 i;
- for (i = 1; i <= RX_NPARENS(rx); i++) {
- char digits[TYPE_CHARS(long)];
- const STRLEN len = my_snprintf(digits, sizeof(digits), "%lu", (long)i);
- GV *const *const gvp
- = (GV**)hv_fetch(PL_defstash, digits, len, 0);
-
- if (gvp) {
- GV * const gv = *gvp;
- if (SvTYPE(gv) == SVt_PVGV && GvSV(gv))
- save_scalar(gv);
- }
- }
- }
- }
-}
-#endif
-
-static void
-clear_re(pTHX_ void *r)
-{
- dVAR;
- ReREFCNT_dec((REGEXP *)r);
-}
-
-#ifdef DEBUGGING
-
-STATIC void
-S_put_byte(pTHX_ SV *sv, int c)
-{
- PERL_ARGS_ASSERT_PUT_BYTE;
-
- /* Our definition of isPRINT() ignores locales, so only bytes that are
- not part of UTF-8 are considered printable. I assume that the same
- holds for UTF-EBCDIC.
- Also, code point 255 is not printable in either (it's E0 in EBCDIC,
- which Wikipedia says:
-
- EO, or Eight Ones, is an 8-bit EBCDIC character code represented as all
- ones (binary 1111 1111, hexadecimal FF). It is similar, but not
- identical, to the ASCII delete (DEL) or rubout control character.
- ) So the old condition can be simplified to !isPRINT(c) */
- if (!isPRINT(c))
- Perl_sv_catpvf(aTHX_ sv, "\\%o", c);
- else {
- const char string = c;
- if (c == '-' || c == ']' || c == '\\' || c == '^')
- sv_catpvs(sv, "\\");
- sv_catpvn(sv, &string, 1);
- }
-}
-
-
-#define CLEAR_OPTSTART \
- if (optstart) STMT_START { \
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log, " (%"IVdf" nodes)\n", (IV)(node - optstart))); \
- optstart=NULL; \
- } STMT_END
-
-#define DUMPUNTIL(b,e) CLEAR_OPTSTART; node=dumpuntil(r,start,(b),(e),last,sv,indent+1,depth+1);
-
-STATIC const regnode *
-S_dumpuntil(pTHX_ const regexp *r, const regnode *start, const regnode *node,
- const regnode *last, const regnode *plast,
- SV* sv, I32 indent, U32 depth)
-{
- dVAR;
- register U8 op = PSEUDO; /* Arbitrary non-END op. */
- register const regnode *next;
- const regnode *optstart= NULL;
-
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMPUNTIL;
-
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d : %d - %d - %d\n",indent,node-start,
- last ? last-start : 0,plast ? plast-start : 0);
-#endif
-
- if (plast && plast < last)
- last= plast;
-
- while (PL_regkind[op] != END && (!last || node < last)) {
- /* While that wasn't END last time... */
- NODE_ALIGN(node);
- op = OP(node);
- if (op == CLOSE || op == WHILEM)
- indent--;
- next = regnext((regnode *)node);
-
- /* Where, what. */
- if (OP(node) == OPTIMIZED) {
- if (!optstart && RE_DEBUG_FLAG(RE_DEBUG_COMPILE_OPTIMISE))
- optstart = node;
- else
- goto after_print;
- } else
- CLEAR_OPTSTART;
-
- regprop(r, sv, node);
- PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start),
- (int)(2*indent + 1), "", SvPVX_const(sv));
-
- if (OP(node) != OPTIMIZED) {
- if (next == NULL) /* Next ptr. */
- PerlIO_printf(Perl_debug_log, " (0)");
- else if (PL_regkind[(U8)op] == BRANCH && PL_regkind[OP(next)] != BRANCH )
- PerlIO_printf(Perl_debug_log, " (FAIL)");
- else
- PerlIO_printf(Perl_debug_log, " (%"IVdf")", (IV)(next - start));
- (void)PerlIO_putc(Perl_debug_log, '\n');
- }
-
- after_print:
- if (PL_regkind[(U8)op] == BRANCHJ) {
- assert(next);
- {
- register const regnode *nnode = (OP(next) == LONGJMP
- ? regnext((regnode *)next)
- : next);
- if (last && nnode > last)
- nnode = last;
- DUMPUNTIL(NEXTOPER(NEXTOPER(node)), nnode);
- }
- }
- else if (PL_regkind[(U8)op] == BRANCH) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node), next);
- }
- else if ( PL_regkind[(U8)op] == TRIE ) {
- const regnode *this_trie = node;
- const char op = OP(node);
- const U32 n = ARG(node);
- const reg_ac_data * const ac = op>=AHOCORASICK ?
- (reg_ac_data *)ri->data->data[n] :
- NULL;
- const reg_trie_data * const trie =
- (reg_trie_data*)ri->data->data[op<AHOCORASICK ? n : ac->trie];
-#ifdef DEBUGGING
- AV *const trie_words = MUTABLE_AV(ri->data->data[n + TRIE_WORDS_OFFSET]);
-#endif
- const regnode *nextbranch= NULL;
- I32 word_idx;
- sv_setpvs(sv, "");
- for (word_idx= 0; word_idx < (I32)trie->wordcount; word_idx++) {
- SV ** const elem_ptr = av_fetch(trie_words,word_idx,0);
-
- PerlIO_printf(Perl_debug_log, "%*s%s ",
- (int)(2*(indent+3)), "",
- elem_ptr ? pv_pretty(sv, SvPV_nolen_const(*elem_ptr), SvCUR(*elem_ptr), 60,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*elem_ptr) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT
- )
- : "???"
- );
- if (trie->jump) {
- U16 dist= trie->jump[word_idx+1];
- PerlIO_printf(Perl_debug_log, "(%"UVuf")\n",
- (UV)((dist ? this_trie + dist : next) - start));
- if (dist) {
- if (!nextbranch)
- nextbranch= this_trie + trie->jump[0];
- DUMPUNTIL(this_trie + dist, nextbranch);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode *)nextbranch);
- } else {
- PerlIO_printf(Perl_debug_log, "\n");
- }
- }
- if (last && next > last)
- node= last;
- else
- node= next;
- }
- else if ( op == CURLY ) { /* "next" might be very big: optimizer */
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS,
- NEXTOPER(node) + EXTRA_STEP_2ARGS + 1);
- }
- else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, next);
- }
- else if ( op == PLUS || op == STAR) {
- DUMPUNTIL(NEXTOPER(node), NEXTOPER(node) + 1);
- }
- else if (op == ANYOF) {
- /* arglen 1 + class block */
- node += 1 + ((ANYOF_FLAGS(node) & ANYOF_LARGE)
- ? ANYOF_CLASS_SKIP : ANYOF_SKIP);
- node = NEXTOPER(node);
- }
- else if (PL_regkind[(U8)op] == EXACT) {
- /* Literal string, where present. */
- node += NODE_SZ_STR(node) - 1;
- node = NEXTOPER(node);
- }
- else {
- node = NEXTOPER(node);
- node += regarglen[(U8)op];
- }
- if (op == CURLYX || op == OPEN)
- indent++;
- }
- CLEAR_OPTSTART;
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d\n", (int)indent);
-#endif
- return node;
-}
-
-#endif /* DEBUGGING */
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regexec.c
- */
-
-/*
- * One Ring to rule them all, One Ring to find them
- &
- * [p.v of _The Lord of the Rings_, opening poem]
- * [p.50 of _The Lord of the Rings_, I/iii: "The Shadow of the Past"]
- * [p.254 of _The Lord of the Rings_, II/ii: "The Council of Elrond"]
- */
-
-/* This file contains functions for executing a regular expression. See
- * also regcomp.c which funnily enough, contains functions for compiling
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_exec.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGEXEC_C
-#include "perl.h"
-
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#define RF_tainted 1 /* tainted information used? */
-#define RF_warned 2 /* warned about big count? */
-
-#define RF_utf8 8 /* Pattern contains multibyte chars? */
-
-#define UTF ((PL_reg_flags & RF_utf8) != 0)
-
-#define RS_init 1 /* eval environment created */
-#define RS_set 2 /* replsv value is set */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-#define REGINCLASS(prog,p,c) (ANYOF_FLAGS(p) ? reginclass(prog,p,c,0,0) : ANYOF_BITMAP_TEST(p,*(c)))
-
-/*
- * Forwards.
- */
-
-#define CHR_SVLEN(sv) (do_utf8 ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (PL_reg_match_utf8 ? utf8_distance(a,b) : a - b)
-
-#define HOPc(pos,off) \
- (char *)(PL_reg_match_utf8 \
- ? reghop3((U8*)pos, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)) \
- : (U8*)(pos + off))
-#define HOPBACKc(pos, off) \
- (char*)(PL_reg_match_utf8\
- ? reghopmaybe3((U8*)pos, -off, (U8*)PL_bostr) \
- : (pos - off >= PL_bostr) \
- ? (U8*)pos - off \
- : NULL)
-
-#define HOP3(pos,off,lim) (PL_reg_match_utf8 ? reghop3((U8*)(pos), off, (U8*)(lim)) : (U8*)(pos + off))
-#define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim))
-
-/* these are unrolled below in the CCC_TRY_XXX defined */
-#define LOAD_UTF8_CHARCLASS(class,str) STMT_START { \
- if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)str); assert(ok); LEAVE; } } STMT_END
-
-/* Doesn't do an assert to verify that is correct */
-#define LOAD_UTF8_CHARCLASS_NO_CHECK(class) STMT_START { \
- if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)" "); LEAVE; } } STMT_END
-
-#define LOAD_UTF8_CHARCLASS_ALNUM() LOAD_UTF8_CHARCLASS(alnum,"a")
-#define LOAD_UTF8_CHARCLASS_DIGIT() LOAD_UTF8_CHARCLASS(digit,"0")
-#define LOAD_UTF8_CHARCLASS_SPACE() LOAD_UTF8_CHARCLASS(space," ")
-
-#define LOAD_UTF8_CHARCLASS_GCB() /* Grapheme cluster boundaries */ \
- LOAD_UTF8_CHARCLASS(X_begin, " "); \
- LOAD_UTF8_CHARCLASS(X_non_hangul, "A"); \
- /* These are utf8 constants, and not utf-ebcdic constants, so the \
- * assert should likely and hopefully fail on an EBCDIC machine */ \
- LOAD_UTF8_CHARCLASS(X_extend, "\xcc\x80"); /* U+0300 */ \
- \
- /* No asserts are done for these, in case called on an early \
- * Unicode version in which they map to nothing */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_prepend);/* U+0E40 "\xe0\xb9\x80" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_L); /* U+1100 "\xe1\x84\x80" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_LV); /* U+AC00 "\xea\xb0\x80" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_LVT); /* U+AC01 "\xea\xb0\x81" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_LV_LVT_V);/* U+AC01 "\xea\xb0\x81" */\
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_T); /* U+11A8 "\xe1\x86\xa8" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_V) /* U+1160 "\xe1\x85\xa0" */
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS_ALNUM()
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS_SPACE()
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS_DIGIT()
-#define RE_utf8_perl_word PL_utf8_alnum
-#define RE_utf8_perl_space PL_utf8_space
-#define RE_utf8_posix_digit PL_utf8_digit
-#define perl_word alnum
-#define perl_space space
-#define posix_digit digit
-#else
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS(perl_word,"a")
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS(perl_space," ")
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS(posix_digit,"0")
-#define RE_utf8_perl_word PL_utf8_perl_word
-#define RE_utf8_perl_space PL_utf8_perl_space
-#define RE_utf8_posix_digit PL_utf8_posix_digit
-#endif
-
-
-#define CCC_TRY_AFF(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME: \
- if (!nextchr) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if (!(OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if (!(OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-#define CCC_TRY_NEG(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME : \
- if (!nextchr && locinput >= PL_regeol) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if ((OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if ((OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-
-
-
-
-/* TODO: Combine JUMPABLE and HAS_TEXT to cache OP(rn) */
-
-/* for use after a quantifier and before an EXACT-like node -- japhy */
-/* it would be nice to rework regcomp.sym to generate this stuff. sigh */
-#define JUMPABLE(rn) ( \
- OP(rn) == OPEN || \
- (OP(rn) == CLOSE && (!cur_eval || cur_eval->u.eval.close_paren != ARG(rn))) || \
- OP(rn) == EVAL || \
- OP(rn) == SUSPEND || OP(rn) == IFMATCH || \
- OP(rn) == PLUS || OP(rn) == MINMOD || \
- OP(rn) == KEEPS || (PL_regkind[OP(rn)] == VERB) || \
- (PL_regkind[OP(rn)] == CURLY && ARG1(rn) > 0) \
-)
-#define IS_EXACT(rn) (PL_regkind[OP(rn)] == EXACT)
-
-#define HAS_TEXT(rn) ( IS_EXACT(rn) || PL_regkind[OP(rn)] == REF )
-
-#if 0
-/* Currently these are only used when PL_regkind[OP(rn)] == EXACT so
- we don't need this definition. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT || OP(rn)==REF || OP(rn)==NREF )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF || OP(rn)==REFF || OP(rn)==NREFF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL || OP(rn)==REFFL || OP(rn)==NREFFL )
-
-#else
-/* ... so we use this as its faster. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL )
-
-#endif
-
-/*
- Search for mandatory following text node; for lookahead, the text must
- follow but for lookbehind (rn->flags != 0) we skip to the next step.
-*/
-#define FIND_NEXT_IMPT(rn) STMT_START { \
- while (JUMPABLE(rn)) { \
- const OPCODE type = OP(rn); \
- if (type == SUSPEND || PL_regkind[type] == CURLY) \
- rn = NEXTOPER(NEXTOPER(rn)); \
- else if (type == PLUS) \
- rn = NEXTOPER(rn); \
- else if (type == IFMATCH) \
- rn = (rn->flags == 0) ? NEXTOPER(NEXTOPER(rn)) : rn + ARG(rn); \
- else rn += NEXT_OFF(rn); \
- } \
-} STMT_END
-
-
-static void restore_pos(pTHX_ void *arg);
-
-STATIC CHECKPOINT
-S_regcppush(pTHX_ I32 parenfloor)
-{
- dVAR;
- const int retval = PL_savestack_ix;
-#define REGCP_PAREN_ELEMS 4
- const int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS;
- int p;
- GET_RE_DEBUG_FLAGS_DECL;
-
- if (paren_elems_to_push < 0)
- Perl_croak(aTHX_ "panic: paren_elems_to_push < 0");
-
-#define REGCP_OTHER_ELEMS 7
- SSGROW(paren_elems_to_push + REGCP_OTHER_ELEMS);
-
- for (p = PL_regsize; p > parenfloor; p--) {
-/* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */
- SSPUSHINT(PL_regoffs[p].end);
- SSPUSHINT(PL_regoffs[p].start);
- SSPUSHPTR(PL_reg_start_tmp[p]);
- SSPUSHINT(p);
- DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log,
- " saving \\%"UVuf" %"IVdf"(%"IVdf")..%"IVdf"\n",
- (UV)p, (IV)PL_regoffs[p].start,
- (IV)(PL_reg_start_tmp[p] - PL_bostr),
- (IV)PL_regoffs[p].end
- ));
- }
-/* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */
- SSPUSHPTR(PL_regoffs);
- SSPUSHINT(PL_regsize);
- SSPUSHINT(*PL_reglastparen);
- SSPUSHINT(*PL_reglastcloseparen);
- SSPUSHPTR(PL_reginput);
-#define REGCP_FRAME_ELEMS 2
-/* REGCP_FRAME_ELEMS are part of the REGCP_OTHER_ELEMS and
- * are needed for the regexp context stack bookkeeping. */
- SSPUSHINT(paren_elems_to_push + REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- SSPUSHINT(SAVEt_REGCONTEXT); /* Magic cookie. */
-
- return retval;
-}
-
-/* These are needed since we do not localize EVAL nodes: */
-#define REGCP_SET(cp) \
- DEBUG_STATE_r( \
- PerlIO_printf(Perl_debug_log, \
- " Setting an EVAL scope, savestack=%"IVdf"\n", \
- (IV)PL_savestack_ix)); \
- cp = PL_savestack_ix
-
-#define REGCP_UNWIND(cp) \
- DEBUG_STATE_r( \
- if (cp != PL_savestack_ix) \
- PerlIO_printf(Perl_debug_log, \
- " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \
- (IV)(cp), (IV)PL_savestack_ix)); \
- regcpblow(cp)
-
-STATIC char *
-S_regcppop(pTHX_ const regexp *rex)
-{
- dVAR;
- U32 i;
- char *input;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCPPOP;
-
- /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */
- i = SSPOPINT;
- assert(i == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */
- i = SSPOPINT; /* Parentheses elements to pop. */
- input = (char *) SSPOPPTR;
- *PL_reglastcloseparen = SSPOPINT;
- *PL_reglastparen = SSPOPINT;
- PL_regsize = SSPOPINT;
- PL_regoffs=(regexp_paren_pair *) SSPOPPTR;
-
-
- /* Now restore the parentheses context. */
- for (i -= (REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- i > 0; i -= REGCP_PAREN_ELEMS) {
- I32 tmps;
- U32 paren = (U32)SSPOPINT;
- PL_reg_start_tmp[paren] = (char *) SSPOPPTR;
- PL_regoffs[paren].start = SSPOPINT;
- tmps = SSPOPINT;
- if (paren <= *PL_reglastparen)
- PL_regoffs[paren].end = tmps;
- DEBUG_BUFFERS_r(
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n",
- (UV)paren, (IV)PL_regoffs[paren].start,
- (IV)(PL_reg_start_tmp[paren] - PL_bostr),
- (IV)PL_regoffs[paren].end,
- (paren > *PL_reglastparen ? "(no)" : ""));
- );
- }
- DEBUG_BUFFERS_r(
- if (*PL_reglastparen + 1 <= rex->nparens) {
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"IVdf"..\\%"IVdf" to undef\n",
- (IV)(*PL_reglastparen + 1), (IV)rex->nparens);
- }
- );
-#if 1
- /* It would seem that the similar code in regtry()
- * already takes care of this, and in fact it is in
- * a better location to since this code can #if 0-ed out
- * but the code in regtry() is needed or otherwise tests
- * requiring null fields (pat.t#187 and split.t#{13,14}
- * (as of patchlevel 7877) will fail. Then again,
- * this code seems to be necessary or otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * --jhi updated by dapm */
- for (i = *PL_reglastparen + 1; i <= rex->nparens; i++) {
- if (i > PL_regsize)
- PL_regoffs[i].start = -1;
- PL_regoffs[i].end = -1;
- }
-#endif
- return input;
-}
-
-#define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */
-
-/*
- * pregexec and friends
- */
-
-#ifndef PERL_IN_XSUB_RE
-/*
- - pregexec - match a regexp against a string
- */
-I32
-Perl_pregexec(pTHX_ REGEXP * const prog, char* stringarg, register char *strend,
- char *strbeg, I32 minend, SV *screamer, U32 nosave)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* nosave: For optimizations. */
-{
- PERL_ARGS_ASSERT_PREGEXEC;
-
- return
- regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL,
- nosave ? 0 : REXEC_COPY_STR);
-}
-#endif
-
-/*
- * Need to implement the following flags for reg_anch:
- *
- * USE_INTUIT_NOML - Useful to call re_intuit_start() first
- * USE_INTUIT_ML
- * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer
- * INTUIT_AUTORITATIVE_ML
- * INTUIT_ONCE_NOML - Intuit can match in one location only.
- * INTUIT_ONCE_ML
- *
- * Another flag for this function: SECOND_TIME (so that float substrs
- * with giant delta may be not rechecked).
- */
-
-/* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */
-
-/* If SCREAM, then SvPVX_const(sv) should be compatible with strpos and strend.
- Otherwise, only SvCUR(sv) is used to get strbeg. */
-
-/* XXXX We assume that strpos is strbeg unless sv. */
-
-/* XXXX Some places assume that there is a fixed substring.
- An update may be needed if optimizer marks as "INTUITable"
- RExen without fixed substrings. Similarly, it is assumed that
- lengths of all the strings are no more than minlen, thus they
- cannot come from lookahead.
- (Or minlen should take into account lookahead.)
- NOTE: Some of this comment is not correct. minlen does now take account
- of lookahead/behind. Further research is required. -- demerphq
-
-*/
-
-/* A failure to find a constant substring means that there is no need to make
- an expensive call to REx engine, thus we celebrate a failure. Similarly,
- finding a substring too deep into the string means that less calls to
- regtry() should be needed.
-
- REx compiler's optimizer found 4 possible hints:
- a) Anchored substring;
- b) Fixed substring;
- c) Whether we are anchored (beginning-of-line or \G);
- d) First node (of those at offset 0) which may distingush positions;
- We use a)b)d) and multiline-part of c), and try to find a position in the
- string which does not contradict any of them.
- */
-
-/* Most of decisions we do here should have been done at compile time.
- The nodes of the REx which we used for the search should have been
- deleted from the finite automaton. */
-
-char *
-Perl_re_intuit_start(pTHX_ REGEXP * const rx, SV *sv, char *strpos,
- char *strend, const U32 flags, re_scream_pos_data *data)
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- register I32 start_shift = 0;
- /* Should be nonnegative! */
- register I32 end_shift = 0;
- register char *s;
- register SV *check;
- char *strbeg;
- char *t;
- const bool do_utf8 = (sv && SvUTF8(sv)) ? 1 : 0; /* if no sv we have to assume bytes */
- I32 ml_anch;
- register char *other_last = NULL; /* other substr checked before this */
- char *check_at = NULL; /* check substr found at this pos */
- const I32 multiline = prog->extflags & RXf_PMf_MULTILINE;
- RXi_GET_DECL(prog,progi);
-#ifdef DEBUGGING
- const char * const i_strpos = strpos;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_START;
-
- RX_MATCH_UTF8_set(rx,do_utf8);
-
- if (RX_UTF8(rx)) {
- PL_reg_flags |= RF_utf8;
- }
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, strpos, strend,
- sv ? "Guessing start of match in sv for"
- : "Guessing start of match in string for");
- );
-
- /* CHR_DIST() would be more correct here but it makes things slow. */
- if (prog->minlen > strend - strpos) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short... [re_intuit_start]\n"));
- goto fail;
- }
-
- strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos;
- PL_regeol = strend;
- if (do_utf8) {
- if (!prog->check_utf8 && prog->check_substr)
- to_utf8_substr(prog);
- check = prog->check_utf8;
- } else {
- if (!prog->check_substr && prog->check_utf8)
- to_byte_substr(prog);
- check = prog->check_substr;
- }
- if (check == &PL_sv_undef) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Non-utf8 string cannot match utf8 check string\n"));
- goto fail;
- }
- if (prog->extflags & RXf_ANCH) { /* Match at beg-of-str or after \n */
- ml_anch = !( (prog->extflags & RXf_ANCH_SINGLE)
- || ( (prog->extflags & RXf_ANCH_BOL)
- && !multiline ) ); /* Check after \n? */
-
- if (!ml_anch) {
- if ( !(prog->extflags & RXf_ANCH_GPOS) /* Checked by the caller */
- && !(prog->intflags & PREGf_IMPLICIT) /* not a real BOL */
- /* SvCUR is not set on references: SvRV and SvPVX_const overlap */
- && sv && !SvROK(sv)
- && (strpos != strbeg)) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not at start...\n"));
- goto fail;
- }
- if (prog->check_offset_min == prog->check_offset_max &&
- !(prog->extflags & RXf_CANY_SEEN)) {
- /* Substring at constant offset from beg-of-str... */
- I32 slen;
-
- s = HOP3c(strpos, prog->check_offset_min, strend);
-
- if (SvTAIL(check)) {
- slen = SvCUR(check); /* >= 1 */
-
- if ( strend - s > slen || strend - s < slen - 1
- || (strend - s == slen && strend[-1] != '\n')) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String too long...\n"));
- goto fail_finish;
- }
- /* Now should match s[0..slen-2] */
- slen--;
- if (slen && (*SvPVX_const(check) != *s
- || (slen > 1
- && memNE(SvPVX_const(check), s, slen)))) {
- report_neq:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String not equal...\n"));
- goto fail_finish;
- }
- }
- else if (*SvPVX_const(check) != *s
- || ((slen = SvCUR(check)) > 1
- && memNE(SvPVX_const(check), s, slen)))
- goto report_neq;
- check_at = s;
- goto success_at_start;
- }
- }
- /* Match is anchored, but substr is not anchored wrt beg-of-str. */
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- if (!ml_anch) {
- const I32 end = prog->check_offset_max + CHR_SVLEN(check)
- - (SvTAIL(check) != 0);
- const I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end;
-
- if (end_shift < eshift)
- end_shift = eshift;
- }
- }
- else { /* Can match at random position */
- ml_anch = 0;
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- /* end shift should be non negative here */
- }
-
-#ifdef QDEBUGGING /* 7/99: reports of failure (with the older version) */
- if (end_shift < 0)
- Perl_croak(aTHX_ "panic: end_shift: %"IVdf" pattern:\n%s\n ",
- (IV)end_shift, RX_PRECOMP(prog));
-#endif
-
- restart:
- /* Find a possible match in the region s..strend by looking for
- the "check" substring in the region corrected by start/end_shift. */
-
- {
- I32 srch_start_shift = start_shift;
- I32 srch_end_shift = end_shift;
- if (srch_start_shift < 0 && strbeg - s > srch_start_shift) {
- srch_end_shift -= ((strbeg - s) - srch_start_shift);
- srch_start_shift = strbeg - s;
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "Check offset min: %"IVdf" Start shift: %"IVdf" End shift %"IVdf" Real End Shift: %"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)srch_start_shift,
- (IV)srch_end_shift,
- (IV)prog->check_end_shift);
- });
-
- if (flags & REXEC_SCREAM) {
- I32 p = -1; /* Internal iterator of scream. */
- I32 * const pp = data ? data->scream_pos : &p;
-
- if (PL_screamfirst[BmRARE(check)] >= 0
- || ( BmRARE(check) == '\n'
- && (BmPREVIOUS(check) == SvCUR(check) - 1)
- && SvTAIL(check) ))
- s = screaminstr(sv, check,
- srch_start_shift + (s - strbeg), srch_end_shift, pp, 0);
- else
- goto fail_finish;
- /* we may be pointing at the wrong string */
- if (s && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- if (data)
- *data->scream_olds = s;
- }
- else {
- U8* start_point;
- U8* end_point;
- if (prog->extflags & RXf_CANY_SEEN) {
- start_point= (U8*)(s + srch_start_shift);
- end_point= (U8*)(strend - srch_end_shift);
- } else {
- start_point= HOP3(s, srch_start_shift, srch_start_shift < 0 ? strbeg : strend);
- end_point= HOP3(strend, -srch_end_shift, strbeg);
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "fbm_instr len=%d str=<%.*s>\n",
- (int)(end_point - start_point),
- (int)(end_point - start_point) > 20 ? 20 : (int)(end_point - start_point),
- start_point);
- });
-
- s = fbm_instr( start_point, end_point,
- check, multiline ? FBMrf_MULTILINE : 0);
- }
- }
- /* Update the count-of-usability, remove useless subpatterns,
- unshift s. */
-
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(check), RE_SV_DUMPLEN(check), 30);
- PerlIO_printf(Perl_debug_log, "%s %s substr %s%s%s",
- (s ? "Found" : "Did not find"),
- (check == (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)
- ? "anchored" : "floating"),
- quoted,
- RE_SV_TAIL(check),
- (s ? " at offset " : "...\n") );
- });
-
- if (!s)
- goto fail_finish;
- /* Finish the diagnostic message */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) );
-
- /* XXX dmq: first branch is for positive lookbehind...
- Our check string is offset from the beginning of the pattern.
- So we need to do any stclass tests offset forward from that
- point. I think. :-(
- */
-
-
-
- check_at=s;
-
-
- /* Got a candidate. Check MBOL anchoring, and the *other* substr.
- Start with the other substr.
- XXXX no SCREAM optimization yet - and a very coarse implementation
- XXXX /ttx+/ results in anchored="ttx", floating="x". floating will
- *always* match. Probably should be marked during compile...
- Probably it is right to do no SCREAM here...
- */
-
- if (do_utf8 ? (prog->float_utf8 && prog->anchored_utf8)
- : (prog->float_substr && prog->anchored_substr))
- {
- /* Take into account the "other" substring. */
- /* XXXX May be hopelessly wrong for UTF... */
- if (!other_last)
- other_last = strpos;
- if (check == (do_utf8 ? prog->float_utf8 : prog->float_substr)) {
- do_other_anchored:
- {
- char * const last = HOP3c(s, -start_shift, strbeg);
- char *last1, *last2;
- char * const saved_s = s;
- SV* must;
-
- t = s - prog->check_offset_max;
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -(prog->check_offset_max), (U8*)strpos))
- && t > strpos)))
- NOOP;
- else
- t = strpos;
- t = HOP3c(t, prog->anchored_offset, strend);
- if (t < other_last) /* These positions already checked */
- t = other_last;
- last2 = last1 = HOP3c(strend, -prog->minlen, strbeg);
- if (last < last1)
- last1 = last;
- /* XXXX It is not documented what units *_offsets are in.
- We assume bytes, but this is clearly wrong.
- Meaning this code needs to be carefully reviewed for errors.
- dmq.
- */
-
- /* On end-of-str: see comment below. */
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->anchored_utf8); /* for debug */
- }
- else
- s = fbm_instr(
- (unsigned char*)t,
- HOP3(HOP3(last1, prog->anchored_offset, strend)
- + SvCUR(must), -(SvTAIL(must)!=0), strbeg),
- must,
- multiline ? FBMrf_MULTILINE : 0
- );
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s anchored substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
-
-
- if (!s) {
- if (last1 >= last2) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying floating at offset %ld...\n",
- (long)(HOP3c(saved_s, 1, strend) - i_strpos)));
- other_last = HOP3c(last1, prog->anchored_offset+1, strend);
- s = HOP3c(last, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- t = HOP3c(s, -prog->anchored_offset, strbeg);
- other_last = HOP3c(s, 1, strend);
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
- else { /* Take into account the floating substring. */
- char *last, *last1;
- char * const saved_s = s;
- SV* must;
-
- t = HOP3c(s, -start_shift, strbeg);
- last1 = last =
- HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg);
- if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset)
- last = HOP3c(t, prog->float_max_offset, strend);
- s = HOP3c(t, prog->float_min_offset, strend);
- if (s < other_last)
- s = other_last;
- /* XXXX It is not documented what units *_offsets are in. Assume bytes. */
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- /* fbm_instr() takes into account exact value of end-of-str
- if the check is SvTAIL(ed). Since false positives are OK,
- and end-of-str is not later than strend we are OK. */
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->float_utf8); /* for debug message */
- }
- else
- s = fbm_instr((unsigned char*)s,
- (unsigned char*)last + SvCUR(must)
- - (SvTAIL(must)!=0),
- must, multiline ? FBMrf_MULTILINE : 0);
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s floating substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
- if (!s) {
- if (last1 == last) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying anchored starting at offset %ld...\n",
- (long)(saved_s + 1 - i_strpos)));
- other_last = last;
- s = HOP3c(t, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- other_last = s; /* Fix this later. --Hugo */
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
-
-
- t= (char*)HOP3( s, -prog->check_offset_max, (prog->check_offset_max<0) ? strend : strpos);
-
- DEBUG_OPTIMISE_MORE_r(
- PerlIO_printf(Perl_debug_log,
- "Check offset min:%"IVdf" max:%"IVdf" S:%"IVdf" t:%"IVdf" D:%"IVdf" end:%"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)prog->check_offset_max,
- (IV)(s-strpos),
- (IV)(t-strpos),
- (IV)(t-s),
- (IV)(strend-strpos)
- )
- );
-
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -prog->check_offset_max, (U8*) ((prog->check_offset_max<0) ? strend : strpos)))
- && t > strpos)))
- {
- /* Fixed substring is found far enough so that the match
- cannot start at strpos. */
- try_at_offset:
- if (ml_anch && t[-1] != '\n') {
- /* Eventually fbm_*() should handle this, but often
- anchored_offset is not 0, so this check will not be wasted. */
- /* XXXX In the code below we prefer to look for "^" even in
- presence of anchored substrings. And we search even
- beyond the found float position. These pessimizations
- are historical artefacts only. */
- find_anchor:
- while (t < strend - prog->minlen) {
- if (*t == '\n') {
- if (t < check_at - prog->check_offset_min) {
- if (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) {
- /* Since we moved from the found position,
- we definitely contradict the found anchored
- substr. Due to the above check we do not
- contradict "check" substr.
- Thus we can arrive here only if check substr
- is float. Redo checking for "other"=="fixed".
- */
- strpos = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset)));
- goto do_other_anchored;
- }
- /* We don't contradict the found floating substring. */
- /* XXXX Why not check for STCLASS? */
- s = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(s - i_strpos)));
- goto set_useful;
- }
- /* Position contradicts check-string */
- /* XXXX probably better to look for check-string
- than for "\n", so one should lower the limit for t? */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t + 1 - i_strpos)));
- other_last = strpos = s = t + 1;
- goto restart;
- }
- t++;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- goto fail_finish;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- }
- s = t;
- set_useful:
- ++BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr); /* hooray/5 */
- }
- else {
- /* The found string does not prohibit matching at strpos,
- - no optimization of calling REx engine can be performed,
- unless it was an MBOL and we are not after MBOL,
- or a future STCLASS check will fail this. */
- try_at_start:
- /* Even in this situation we may use MBOL flag if strpos is offset
- wrt the start of the string. */
- if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */
- && (strpos != strbeg) && strpos[-1] != '\n'
- /* May be due to an implicit anchor of m{.*foo} */
- && !(prog->intflags & PREGf_IMPLICIT))
- {
- t = strpos;
- goto find_anchor;
- }
- DEBUG_EXECUTE_r( if (ml_anch)
- PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n",
- (long)(strpos - i_strpos), PL_colors[0], PL_colors[1]);
- );
- success_at_start:
- if (!(prog->intflags & PREGf_NAUGHTY) /* XXXX If strpos moved? */
- && (do_utf8 ? (
- prog->check_utf8 /* Could be deleted already */
- && --BmUSEFUL(prog->check_utf8) < 0
- && (prog->check_utf8 == prog->float_utf8)
- ) : (
- prog->check_substr /* Could be deleted already */
- && --BmUSEFUL(prog->check_substr) < 0
- && (prog->check_substr == prog->float_substr)
- )))
- {
- /* If flags & SOMETHING - do not do it many times on the same match */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n"));
- /* XXX Does the destruction order has to change with do_utf8? */
- SvREFCNT_dec(do_utf8 ? prog->check_utf8 : prog->check_substr);
- SvREFCNT_dec(do_utf8 ? prog->check_substr : prog->check_utf8);
- prog->check_substr = prog->check_utf8 = NULL; /* disable */
- prog->float_substr = prog->float_utf8 = NULL; /* clear */
- check = NULL; /* abort */
- s = strpos;
- /* XXXX This is a remnant of the old implementation. It
- looks wasteful, since now INTUIT can use many
- other heuristics. */
- prog->extflags &= ~RXf_USE_INTUIT;
- }
- else
- s = strpos;
- }
-
- /* Last resort... */
- /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */
- /* trie stclasses are too expensive to use here, we are better off to
- leave it to regmatch itself */
- if (progi->regstclass && PL_regkind[OP(progi->regstclass)]!=TRIE) {
- /* minlen == 0 is possible if regstclass is \b or \B,
- and the fixed substr is ''$.
- Since minlen is already taken into account, s+1 is before strend;
- accidentally, minlen >= 1 guaranties no false positives at s + 1
- even for \b or \B. But (minlen? 1 : 0) below assumes that
- regstclass does not come from lookahead... */
- /* If regstclass takes bytelength more than 1: If charlength==1, OK.
- This leaves EXACTF only, which is dealt with in find_byclass(). */
- const U8* const str = (U8*)STRING(progi->regstclass);
- const int cl_l = (PL_regkind[OP(progi->regstclass)] == EXACT
- ? CHR_DIST(str+STR_LEN(progi->regstclass), str)
- : 1);
- char * endpos;
- if (prog->anchored_substr || prog->anchored_utf8 || ml_anch)
- endpos= HOP3c(s, (prog->minlen ? cl_l : 0), strend);
- else if (prog->float_substr || prog->float_utf8)
- endpos= HOP3c(HOP3c(check_at, -start_shift, strbeg), cl_l, strend);
- else
- endpos= strend;
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %"IVdf" s: %"IVdf" endpos: %"IVdf"\n",
- (IV)start_shift, (IV)(check_at - strbeg), (IV)(s - strbeg), (IV)(endpos - strbeg)));
-
- t = s;
- s = find_byclass(prog, progi->regstclass, s, endpos, NULL);
- if (!s) {
-#ifdef DEBUGGING
- const char *what = NULL;
-#endif
- if (endpos == strend) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "This position contradicts STCLASS...\n") );
- if ((prog->extflags & RXf_ANCH) && !ml_anch)
- goto fail;
- /* Contradict one of substrings */
- if (prog->anchored_substr || prog->anchored_utf8) {
- if ((do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) == check) {
- DEBUG_EXECUTE_r( what = "anchored" );
- hop_and_restart:
- s = HOP3c(t, 1, strend);
- if (s + start_shift + end_shift > strend) {
- /* XXXX Should be taken into account earlier? */
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for %s substr starting at offset %ld...\n",
- what, (long)(s + start_shift - i_strpos)) );
- goto restart;
- }
- /* Have both, check_string is floating */
- if (t + start_shift >= check_at) /* Contradicts floating=check */
- goto retry_floating_check;
- /* Recheck anchored substring, but not floating... */
- s = check_at;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for anchored substr starting at offset %ld...\n",
- (long)(other_last - i_strpos)) );
- goto do_other_anchored;
- }
- /* Another way we could have checked stclass at the
- current position only: */
- if (ml_anch) {
- s = t = t + 1;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for /%s^%s/m starting at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t - i_strpos)) );
- goto try_at_offset;
- }
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) /* Could have been deleted */
- goto fail;
- /* Check is floating subtring. */
- retry_floating_check:
- t = check_at - start_shift;
- DEBUG_EXECUTE_r( what = "floating" );
- goto hop_and_restart;
- }
- if (t != s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "By STCLASS: moving %ld --> %ld\n",
- (long)(t - i_strpos), (long)(s - i_strpos))
- );
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Does not contradict STCLASS...\n");
- );
- }
- }
- giveup:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n",
- PL_colors[4], (check ? "Guessed" : "Giving up"),
- PL_colors[5], (long)(s - i_strpos)) );
- return s;
-
- fail_finish: /* Substring not found */
- if (prog->check_substr || prog->check_utf8) /* could be removed already */
- BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr) += 5; /* hooray */
- fail:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n",
- PL_colors[4], PL_colors[5]));
- return NULL;
-}
-
-#define DECL_TRIE_TYPE(scan) \
- const enum { trie_plain, trie_utf8, trie_utf8_fold, trie_latin_utf8_fold } \
- trie_type = (scan->flags != EXACT) \
- ? (do_utf8 ? trie_utf8_fold : (UTF ? trie_latin_utf8_fold : trie_plain)) \
- : (do_utf8 ? trie_utf8 : trie_plain)
-
-#define REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, uscan, len, \
-uvc, charid, foldlen, foldbuf, uniflags) STMT_START { \
- switch (trie_type) { \
- case trie_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_latin_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- len = 1; \
- uvc = to_uni_fold( *(U8*)uc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_utf8: \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- break; \
- case trie_plain: \
- uvc = (UV)*uc; \
- len = 1; \
- } \
- if (uvc < 256) { \
- charid = trie->charmap[ uvc ]; \
- } \
- else { \
- charid = 0; \
- if (widecharmap) { \
- SV** const svpp = hv_fetch(widecharmap, \
- (char*)&uvc, sizeof(UV), 0); \
- if (svpp) \
- charid = (U16)SvIV(*svpp); \
- } \
- } \
-} STMT_END
-
-#define REXEC_FBC_EXACTISH_CHECK(CoNd) \
-{ \
- char *my_strend= (char *)strend; \
- if ( (CoNd) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8, \
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- else { \
- U8 foldbuf[UTF8_MAXBYTES_CASE+1]; \
- uvchr_to_utf8(tmpbuf, c); \
- f = to_utf8_fold(tmpbuf, foldbuf, &foldlen); \
- if ( f != c \
- && (f == c1 || f == c2) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8,\
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- } \
-} \
-s += len
-
-#define REXEC_FBC_EXACTISH_SCAN(CoNd) \
-STMT_START { \
- while (s <= e) { \
- if ( (CoNd) \
- && (ln == 1 || !(OP(c) == EXACTF \
- ? ibcmp(s, m, ln) \
- : ibcmp_locale(s, m, ln))) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_SCAN(CoDe) \
-STMT_START { \
- while (s + (uskip = UTF8SKIP(s)) <= strend) { \
- CoDe \
- s += uskip; \
- } \
-} STMT_END
-
-#define REXEC_FBC_SCAN(CoDe) \
-STMT_START { \
- while (s < strend) { \
- CoDe \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_CLASS_SCAN(CoNd) \
-REXEC_FBC_UTF8_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_CLASS_SCAN(CoNd) \
-REXEC_FBC_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_TRYIT \
-if ((!reginfo || regtry(reginfo, &s))) \
- goto got_it
-
-#define REXEC_FBC_CSCAN(CoNdUtF8,CoNd) \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_PRELOAD(UtFpReLoAd,CoNdUtF8,CoNd) \
- if (do_utf8) { \
- UtFpReLoAd; \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_TAINT(CoNdUtF8,CoNd) \
- PL_reg_flags |= RF_tainted; \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define DUMP_EXEC_POS(li,s,doutf8) \
- dump_exec_pos(li,s,(PL_regeol),(PL_bostr),(PL_reg_starttry),doutf8)
-
-/* We know what class REx starts with. Try to find this position... */
-/* if reginfo is NULL, its a dryrun */
-/* annoyingly all the vars in this routine have different names from their counterparts
- in regmatch. /grrr */
-
-STATIC char *
-S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
- const char *strend, regmatch_info *reginfo)
-{
- dVAR;
- const I32 doevery = (prog->intflags & PREGf_SKIP) == 0;
- char *m;
- STRLEN ln;
- STRLEN lnc;
- register STRLEN uskip;
- unsigned int c1;
- unsigned int c2;
- char *e;
- register I32 tmp = 1; /* Scratch variable? */
- register const bool do_utf8 = PL_reg_match_utf8;
- RXi_GET_DECL(prog,progi);
-
- PERL_ARGS_ASSERT_FIND_BYCLASS;
-
- /* We know what class it must start with. */
- switch (OP(c)) {
- case ANYOF:
- if (do_utf8) {
- REXEC_FBC_UTF8_CLASS_SCAN((ANYOF_FLAGS(c) & ANYOF_UNICODE) ||
- !UTF8_IS_INVARIANT((U8)s[0]) ?
- reginclass(prog, c, (U8*)s, 0, do_utf8) :
- REGINCLASS(prog, c, (U8*)s));
- }
- else {
- while (s < strend) {
- STRLEN skip = 1;
-
- if (REGINCLASS(prog, c, (U8*)s) ||
- (ANYOF_FOLD_SHARP_S(c, s, strend) &&
- /* The assignment of 2 is intentional:
- * for the folded sharp s, the skip is 2. */
- (skip = SHARP_S_SKIP))) {
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += skip;
- }
- }
- break;
- case CANY:
- REXEC_FBC_SCAN(
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- );
- break;
- case EXACTF:
- m = STRING(c);
- ln = STR_LEN(c); /* length to match in octets/bytes */
- lnc = (I32) ln; /* length to match in characters */
- if (UTF) {
- STRLEN ulen1, ulen2;
- U8 *sm = (U8 *) m;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
- /* used by commented-out code below */
- /*const U32 uniflags = UTF8_ALLOW_DEFAULT;*/
-
- /* XXX: Since the node will be case folded at compile
- time this logic is a little odd, although im not
- sure that its actually wrong. --dmq */
-
- c1 = to_utf8_lower((U8*)m, tmpbuf1, &ulen1);
- c2 = to_utf8_upper((U8*)m, tmpbuf2, &ulen2);
-
- /* XXX: This is kinda strange. to_utf8_XYZ returns the
- codepoint of the first character in the converted
- form, yet originally we did the extra step.
- No tests fail by commenting this code out however
- so Ive left it out. -- dmq.
-
- c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- */
-
- lnc = 0;
- while (sm < ((U8 *) m + ln)) {
- lnc++;
- sm += UTF8SKIP(sm);
- }
- }
- else {
- c1 = *(U8*)m;
- c2 = PL_fold[c1];
- }
- goto do_exactf;
- case EXACTFL:
- m = STRING(c);
- ln = STR_LEN(c);
- lnc = (I32) ln;
- c1 = *(U8*)m;
- c2 = PL_fold_locale[c1];
- do_exactf:
- e = HOP3c(strend, -((I32)lnc), s);
-
- if (!reginfo && e < s)
- e = s; /* Due to minlen logic of intuit() */
-
- /* The idea in the EXACTF* cases is to first find the
- * first character of the EXACTF* node and then, if
- * necessary, case-insensitively compare the full
- * text of the node. The c1 and c2 are the first
- * characters (though in Unicode it gets a bit
- * more complicated because there are more cases
- * than just upper and lower: one needs to use
- * the so-called folding case for case-insensitive
- * matching (called "loose matching" in Unicode).
- * ibcmp_utf8() will do just that. */
-
- if (do_utf8 || UTF) {
- UV c, f;
- U8 tmpbuf [UTF8_MAXBYTES+1];
- STRLEN len = 1;
- STRLEN foldlen;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- if (c1 == c2) {
- /* Upper and lower of 1st char are equal -
- * probably not a "letter". */
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
- REXEC_FBC_EXACTISH_CHECK(c == c1);
- }
- }
- else {
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
-
- /* Handle some of the three Greek sigmas cases.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (the character class or ANYOF cases)
- * are handled during compiletime in
- * regexec.c:S_regclass(). */
- if (c == (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA ||
- c == (UV)UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA)
- c = (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA;
-
- REXEC_FBC_EXACTISH_CHECK(c == c1 || c == c2);
- }
- }
- }
- else {
- /* Neither pattern nor string are UTF8 */
- if (c1 == c2)
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1);
- else
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1 || *(U8*)s == c2);
- }
- break;
- case BOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == BOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == BOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- if ((!prog->minlen && tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NBOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == NBOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == NBOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == NBOUND ?
- isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- if ((!prog->minlen && !tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case ALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- isALNUM(*s)
- );
- case ALNUML:
- REXEC_FBC_CSCAN_TAINT(
- isALNUM_LC_utf8((U8*)s),
- isALNUM_LC(*s)
- );
- case NALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- !swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- !isALNUM(*s)
- );
- case NALNUML:
- REXEC_FBC_CSCAN_TAINT(
- !isALNUM_LC_utf8((U8*)s),
- !isALNUM_LC(*s)
- );
- case SPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- *s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8),
- isSPACE(*s)
- );
- case SPACEL:
- REXEC_FBC_CSCAN_TAINT(
- *s == ' ' || isSPACE_LC_utf8((U8*)s),
- isSPACE_LC(*s)
- );
- case NSPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- !(*s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8)),
- !isSPACE(*s)
- );
- case NSPACEL:
- REXEC_FBC_CSCAN_TAINT(
- !(*s == ' ' || isSPACE_LC_utf8((U8*)s)),
- !isSPACE_LC(*s)
- );
- case DIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- isDIGIT(*s)
- );
- case DIGITL:
- REXEC_FBC_CSCAN_TAINT(
- isDIGIT_LC_utf8((U8*)s),
- isDIGIT_LC(*s)
- );
- case NDIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- !swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- !isDIGIT(*s)
- );
- case NDIGITL:
- REXEC_FBC_CSCAN_TAINT(
- !isDIGIT_LC_utf8((U8*)s),
- !isDIGIT_LC(*s)
- );
- case LNBREAK:
- REXEC_FBC_CSCAN(
- is_LNBREAK_utf8(s),
- is_LNBREAK_latin1(s)
- );
- case VERTWS:
- REXEC_FBC_CSCAN(
- is_VERTWS_utf8(s),
- is_VERTWS_latin1(s)
- );
- case NVERTWS:
- REXEC_FBC_CSCAN(
- !is_VERTWS_utf8(s),
- !is_VERTWS_latin1(s)
- );
- case HORIZWS:
- REXEC_FBC_CSCAN(
- is_HORIZWS_utf8(s),
- is_HORIZWS_latin1(s)
- );
- case NHORIZWS:
- REXEC_FBC_CSCAN(
- !is_HORIZWS_utf8(s),
- !is_HORIZWS_latin1(s)
- );
- case AHOCORASICKC:
- case AHOCORASICK:
- {
- DECL_TRIE_TYPE(c);
- /* what trie are we using right now */
- reg_ac_data *aho
- = (reg_ac_data*)progi->data->data[ ARG( c ) ];
- reg_trie_data *trie
- = (reg_trie_data*)progi->data->data[ aho->trie ];
- HV *widecharmap = MUTABLE_HV(progi->data->data[ aho->trie + 1 ]);
-
- const char *last_start = strend - trie->minlen;
-#ifdef DEBUGGING
- const char *real_start = s;
-#endif
- STRLEN maxlen = trie->maxlen;
- SV *sv_points;
- U8 **points; /* map of where we were in the input string
- when reading a given char. For ASCII this
- is unnecessary overhead as the relationship
- is always 1:1, but for Unicode, especially
- case folded Unicode this is not true. */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- U8 *bitmap=NULL;
-
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- /* We can't just allocate points here. We need to wrap it in
- * an SV so it gets freed properly if there is a croak while
- * running the match */
- ENTER;
- SAVETMPS;
- sv_points=newSV(maxlen * sizeof(U8 *));
- SvCUR_set(sv_points,
- maxlen * sizeof(U8 *));
- SvPOK_on(sv_points);
- sv_2mortal(sv_points);
- points=(U8**)SvPV_nolen(sv_points );
- if ( trie_type != trie_utf8_fold
- && (trie->bitmap || OP(c)==AHOCORASICKC) )
- {
- if (trie->bitmap)
- bitmap=(U8*)trie->bitmap;
- else
- bitmap=(U8*)ANYOF_BITMAP(c);
- }
- /* this is the Aho-Corasick algorithm modified a touch
- to include special handling for long "unknown char"
- sequences. The basic idea being that we use AC as long
- as we are dealing with a possible matching char, when
- we encounter an unknown char (and we have not encountered
- an accepting state) we scan forward until we find a legal
- starting char.
- AC matching is basically that of trie matching, except
- that when we encounter a failing transition, we fall back
- to the current states "fail state", and try the current char
- again, a process we repeat until we reach the root state,
- state 1, or a legal transition. If we fail on the root state
- then we can either terminate if we have reached an accepting
- state previously, or restart the entire process from the beginning
- if we have not.
-
- */
- while (s <= last_start) {
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- U8 *uc = (U8*)s;
- U16 charid = 0;
- U32 base = 1;
- U32 state = 1;
- UV uvc = 0;
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- U8 *leftmost = NULL;
-#ifdef DEBUGGING
- U32 accepted_word= 0;
-#endif
- U32 pointpos = 0;
-
- while ( state && uc <= (U8*)strend ) {
- int failed=0;
- U32 word = aho->states[ state ].wordnum;
-
- if( state==1 ) {
- if ( bitmap ) {
- DEBUG_TRIE_EXECUTE_r(
- if ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- dump_exec_pos( (char *)uc, c, strend, real_start,
- (char *)uc, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- " Scanning for legal start char...\n");
- }
- );
- while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- uc++;
- }
- s= (char *)uc;
- }
- if (uc >(U8*)last_start) break;
- }
-
- if ( word ) {
- U8 *lpos= points[ (pointpos - trie->wordlen[word-1] ) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=word);
- leftmost= lpos;
- }
- if (base==0) break;
-
- }
- points[pointpos++ % maxlen]= uc;
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
- DEBUG_TRIE_EXECUTE_r({
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf(Perl_debug_log,
- " Charid:%3u CP:%4"UVxf" ",
- charid, uvc);
- });
-
- do {
-#ifdef DEBUGGING
- word = aho->states[ state ].wordnum;
-#endif
- base = aho->states[ state ].trans.base;
-
- DEBUG_TRIE_EXECUTE_r({
- if (failed)
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%sState: %4"UVxf", word=%"UVxf,
- failed ? " Fail transition to " : "",
- (UV)state, (UV)word);
- });
- if ( base ) {
- U32 tmp;
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state
- && (tmp=trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next))
- {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - legal\n"));
- state = tmp;
- break;
- }
- else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - fail\n"));
- failed = 1;
- state = aho->fail[state];
- }
- }
- else {
- /* we must be accepting here */
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - accepting\n"));
- failed = 1;
- break;
- }
- } while(state);
- uc += len;
- if (failed) {
- if (leftmost)
- break;
- if (!state) state = 1;
- }
- }
- if ( aho->states[ state ].wordnum ) {
- U8 *lpos = points[ (pointpos - trie->wordlen[aho->states[ state ].wordnum-1]) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=aho->states[ state ].wordnum);
- leftmost = lpos;
- }
- }
- if (leftmost) {
- s = (char*)leftmost;
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf(
- Perl_debug_log,"Matches word #%"UVxf" at position %"IVdf". Trying full pattern...\n",
- (UV)accepted_word, (IV)(s - real_start)
- );
- });
- if (!reginfo || regtry(reginfo, &s)) {
- FREETMPS;
- LEAVE;
- goto got_it;
- }
- s = HOPc(s,1);
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,"Pattern failed. Looking for new start point...\n");
- });
- } else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,"No match.\n"));
- break;
- }
- }
- FREETMPS;
- LEAVE;
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c));
- break;
- }
- return 0;
- got_it:
- return s;
-}
-
-
-/*
- - regexec_flags - match a regexp against a string
- */
-I32
-Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, register char *strend,
- char *strbeg, I32 minend, SV *sv, void *data, U32 flags)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* data: May be used for some additional optimizations.
- Currently its only used, with a U32 cast, for transmitting
- the ganch offset when doing a /g match. This will change */
-/* nosave: For optimizations. */
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- /*register*/ char *s;
- register regnode *c;
- /*register*/ char *startpos = stringarg;
- I32 minlen; /* must match at least this many chars */
- I32 dontbother = 0; /* how many characters not to try at end */
- I32 end_shift = 0; /* Same for the end. */ /* CC */
- I32 scream_pos = -1; /* Internal iterator of scream. */
- char *scream_olds = NULL;
- const bool do_utf8 = (bool)DO_UTF8(sv);
- I32 multiline;
- RXi_GET_DECL(prog,progi);
- regmatch_info reginfo; /* create some info to pass to regtry etc */
- regexp_paren_pair *swap = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGEXEC_FLAGS;
- PERL_UNUSED_ARG(data);
-
- /* Be paranoid... */
- if (prog == NULL || startpos == NULL) {
- Perl_croak(aTHX_ "NULL regexp parameter");
- return 0;
- }
-
- multiline = prog->extflags & RXf_PMf_MULTILINE;
- reginfo.prog = rx; /* Yes, sorry that this is confusing. */
-
- RX_MATCH_UTF8_set(rx, do_utf8);
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, startpos, strend,
- "Matching");
- );
-
- minlen = prog->minlen;
-
- if (strend - startpos < (minlen+(prog->check_offset_min<0?prog->check_offset_min:0))) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short [regexec_flags]...\n"));
- goto phooey;
- }
-
-
- /* Check validity of program. */
- if (UCHARAT(progi->program) != REG_MAGIC) {
- Perl_croak(aTHX_ "corrupted regexp program");
- }
-
- PL_reg_flags = 0;
- PL_reg_eval_set = 0;
- PL_reg_maxiter = 0;
-
- if (RX_UTF8(rx))
- PL_reg_flags |= RF_utf8;
-
- /* Mark beginning of line for ^ and lookbehind. */
- reginfo.bol = startpos; /* XXX not used ??? */
- PL_bostr = strbeg;
- reginfo.sv = sv;
-
- /* Mark end of line for $ (and such) */
- PL_regeol = strend;
-
- /* see how far we have to get to not match where we matched before */
- reginfo.till = startpos+minend;
-
- /* If there is a "must appear" string, look for it. */
- s = startpos;
-
- if (prog->extflags & RXf_GPOS_SEEN) { /* Need to set reginfo->ganch */
- MAGIC *mg;
- if (flags & REXEC_IGNOREPOS){ /* Means: check only at start */
- reginfo.ganch = startpos + prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS IGNOREPOS: reginfo.ganch = startpos + %"UVxf"\n",(UV)prog->gofs));
- } else if (sv && SvTYPE(sv) >= SVt_PVMG
- && SvMAGIC(sv)
- && (mg = mg_find(sv, PERL_MAGIC_regex_global))
- && mg->mg_len >= 0) {
- reginfo.ganch = strbeg + mg->mg_len; /* Defined pos() */
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS MAGIC: reginfo.ganch = strbeg + %"IVdf"\n",(IV)mg->mg_len));
-
- if (prog->extflags & RXf_ANCH_GPOS) {
- if (s > reginfo.ganch)
- goto phooey;
- s = reginfo.ganch - prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS ANCH_GPOS: s = ganch - %"UVxf"\n",(UV)prog->gofs));
- if (s < strbeg)
- goto phooey;
- }
- }
- else if (data) {
- reginfo.ganch = strbeg + PTR2UV(data);
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS DATA: reginfo.ganch= strbeg + %"UVxf"\n",PTR2UV(data)));
-
- } else { /* pos() not defined */
- reginfo.ganch = strbeg;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS: reginfo.ganch = strbeg\n"));
- }
- }
- if (PL_curpm && (PM_GETRE(PL_curpm) == rx)) {
- /* We have to be careful. If the previous successful match
- was from this regex we don't want a subsequent partially
- successful match to clobber the old results.
- So when we detect this possibility we add a swap buffer
- to the re, and switch the buffer each match. If we fail
- we switch it back, otherwise we leave it swapped.
- */
- swap = prog->offs;
- /* do we need a save destructor here for eval dies? */
- Newxz(prog->offs, (prog->nparens + 1), regexp_paren_pair);
- }
- if (!(flags & REXEC_CHECKED) && (prog->check_substr != NULL || prog->check_utf8 != NULL)) {
- re_scream_pos_data d;
-
- d.scream_olds = &scream_olds;
- d.scream_pos = &scream_pos;
- s = re_intuit_start(rx, sv, s, strend, flags, &d);
- if (!s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not present...\n"));
- goto phooey; /* not present */
- }
- }
-
-
-
- /* Simplest case: anchored match need be tried only once. */
- /* [unless only anchor is BOL and multiline is set] */
- if (prog->extflags & (RXf_ANCH & ~RXf_ANCH_GPOS)) {
- if (s == startpos && regtry(®info, &startpos))
- goto got_it;
- else if (multiline || (prog->intflags & PREGf_IMPLICIT)
- || (prog->extflags & RXf_ANCH_MBOL)) /* XXXX SBOL? */
- {
- char *end;
-
- if (minlen)
- dontbother = minlen - 1;
- end = HOP3c(strend, -dontbother, strbeg) - 1;
- /* for multiline we only have to try after newlines */
- if (prog->check_substr || prog->check_utf8) {
- if (s == startpos)
- goto after_try;
- while (1) {
- if (regtry(®info, &s))
- goto got_it;
- after_try:
- if (s > end)
- goto phooey;
- if (prog->extflags & RXf_USE_INTUIT) {
- s = re_intuit_start(rx, sv, s + 1, strend, flags, NULL);
- if (!s)
- goto phooey;
- }
- else
- s++;
- }
- } else {
- if (s > startpos)
- s--;
- while (s < end) {
- if (*s++ == '\n') { /* don't need PL_utf8skip here */
- if (regtry(®info, &s))
- goto got_it;
- }
- }
- }
- }
- goto phooey;
- } else if (RXf_GPOS_CHECK == (prog->extflags & RXf_GPOS_CHECK))
- {
- /* the warning about reginfo.ganch being used without intialization
- is bogus -- we set it above, when prog->extflags & RXf_GPOS_SEEN
- and we only enter this block when the same bit is set. */
- char *tmp_s = reginfo.ganch - prog->gofs;
-
- if (tmp_s >= strbeg && regtry(®info, &tmp_s))
- goto got_it;
- goto phooey;
- }
-
- /* Messy cases: unanchored match. */
- if ((prog->anchored_substr || prog->anchored_utf8) && prog->intflags & PREGf_SKIP) {
- /* we have /x+whatever/ */
- /* it must be a one character string (XXXX Except UTF?) */
- char ch;
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- ch = SvPVX_const(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)[0];
-
- if (do_utf8) {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s += UTF8SKIP(s);
- while (s < strend && *s == ch)
- s += UTF8SKIP(s);
- }
- );
- }
- else {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s++;
- while (s < strend && *s == ch)
- s++;
- }
- );
- }
- DEBUG_EXECUTE_r(if (!did_match)
- PerlIO_printf(Perl_debug_log,
- "Did not find anchored character...\n")
- );
- }
- else if (prog->anchored_substr != NULL
- || prog->anchored_utf8 != NULL
- || ((prog->float_substr != NULL || prog->float_utf8 != NULL)
- && prog->float_max_offset < strend - s)) {
- SV *must;
- I32 back_max;
- I32 back_min;
- char *last;
- char *last1; /* Last position checked before */
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (prog->anchored_substr || prog->anchored_utf8) {
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- back_max = back_min = prog->anchored_offset;
- } else {
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- back_max = prog->float_max_offset;
- back_min = prog->float_min_offset;
- }
-
-
- if (must == &PL_sv_undef)
- /* could not downgrade utf8 check substring, so must fail */
- goto phooey;
-
- if (back_min<0) {
- last = strend;
- } else {
- last = HOP3c(strend, /* Cannot start after this */
- -(I32)(CHR_SVLEN(must)
- - (SvTAIL(must) != 0) + back_min), strbeg);
- }
- if (s > PL_bostr)
- last1 = HOPc(s, -1);
- else
- last1 = s - 1; /* bogus */
-
- /* XXXX check_substr already used to find "s", can optimize if
- check_substr==must. */
- scream_pos = -1;
- dontbother = end_shift;
- strend = HOPc(strend, -dontbother);
- while ( (s <= last) &&
- ((flags & REXEC_SCREAM)
- ? (s = screaminstr(sv, must, HOP3c(s, back_min, (back_min<0 ? strbeg : strend)) - strbeg,
- end_shift, &scream_pos, 0))
- : (s = fbm_instr((unsigned char*)HOP3(s, back_min, (back_min<0 ? strbeg : strend)),
- (unsigned char*)strend, must,
- multiline ? FBMrf_MULTILINE : 0))) ) {
- /* we may be pointing at the wrong string */
- if ((flags & REXEC_SCREAM) && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- DEBUG_EXECUTE_r( did_match = 1 );
- if (HOPc(s, -back_max) > last1) {
- last1 = HOPc(s, -back_min);
- s = HOPc(s, -back_max);
- }
- else {
- char * const t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1;
-
- last1 = HOPc(s, -back_min);
- s = t;
- }
- if (do_utf8) {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s += UTF8SKIP(s);
- }
- }
- else {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s++;
- }
- }
- }
- DEBUG_EXECUTE_r(if (!did_match) {
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "Did not find %s substr %s%s...\n",
- ((must == prog->anchored_substr || must == prog->anchored_utf8)
- ? "anchored" : "floating"),
- quoted, RE_SV_TAIL(must));
- });
- goto phooey;
- }
- else if ( (c = progi->regstclass) ) {
- if (minlen) {
- const OPCODE op = OP(progi->regstclass);
- /* don't bother with what can't match */
- if (PL_regkind[op] != EXACT && op != CANY && PL_regkind[op] != TRIE)
- strend = HOPc(strend, -(minlen - 1));
- }
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, c);
- {
- RE_PV_QUOTED_DECL(quoted,do_utf8,PERL_DEBUG_PAD_ZERO(1),
- s,strend-s,60);
- PerlIO_printf(Perl_debug_log,
- "Matching stclass %.*s against %s (%d chars)\n",
- (int)SvCUR(prop), SvPVX_const(prop),
- quoted, (int)(strend - s));
- }
- });
- if (find_byclass(prog, c, s, strend, ®info))
- goto got_it;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass... [regexec_flags]\n"));
- }
- else {
- dontbother = 0;
- if (prog->float_substr != NULL || prog->float_utf8 != NULL) {
- /* Trim the end. */
- char *last;
- SV* float_real;
-
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- float_real = do_utf8 ? prog->float_utf8 : prog->float_substr;
-
- if (flags & REXEC_SCREAM) {
- last = screaminstr(sv, float_real, s - strbeg,
- end_shift, &scream_pos, 1); /* last one */
- if (!last)
- last = scream_olds; /* Only one occurrence. */
- /* we may be pointing at the wrong string */
- else if (RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- }
- else {
- STRLEN len;
- const char * const little = SvPV_const(float_real, len);
-
- if (SvTAIL(float_real)) {
- if (memEQ(strend - len + 1, little, len - 1))
- last = strend - len + 1;
- else if (!multiline)
- last = memEQ(strend - len, little, len)
- ? strend - len : NULL;
- else
- goto find_last;
- } else {
- find_last:
- if (len)
- last = rninstr(s, strend, little, little + len);
- else
- last = strend; /* matching "$" */
- }
- }
- if (last == NULL) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%sCan't trim the tail, match fails (should not happen)%s\n",
- PL_colors[4], PL_colors[5]));
- goto phooey; /* Should not happen! */
- }
- dontbother = strend - last + prog->float_min_offset;
- }
- if (minlen && (dontbother < minlen))
- dontbother = minlen - 1;
- strend -= dontbother; /* this one's always in bytes! */
- /* We don't know much -- general case. */
- if (do_utf8) {
- for (;;) {
- if (regtry(®info, &s))
- goto got_it;
- if (s >= strend)
- break;
- s += UTF8SKIP(s);
- };
- }
- else {
- do {
- if (regtry(®info, &s))
- goto got_it;
- } while (s++ < strend);
- }
- }
-
- /* Failure. */
- goto phooey;
-
-got_it:
- Safefree(swap);
- RX_MATCH_TAINTED_set(rx, PL_reg_flags & RF_tainted);
-
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (RXp_PAREN_NAMES(prog))
- (void)hv_iterinit(RXp_PAREN_NAMES(prog));
-
- /* make sure $`, $&, $', and $digit will work later */
- if ( !(flags & REXEC_NOT_FIRST) ) {
- RX_MATCH_COPY_FREE(rx);
- if (flags & REXEC_COPY_STR) {
- const I32 i = PL_regeol - startpos + (stringarg - strbeg);
-#ifdef PERL_OLD_COPY_ON_WRITE
- if ((SvIsCOW(sv)
- || (SvFLAGS(sv) & CAN_COW_MASK) == CAN_COW_FLAGS)) {
- if (DEBUG_C_TEST) {
- PerlIO_printf(Perl_debug_log,
- "Copy on write: regexp capture, type %d\n",
- (int) SvTYPE(sv));
- }
- prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv);
- prog->subbeg = (char *)SvPVX_const(prog->saved_copy);
- assert (SvPOKp(prog->saved_copy));
- } else
-#endif
- {
- RX_MATCH_COPIED_on(rx);
- s = savepvn(strbeg, i);
- prog->subbeg = s;
- }
- prog->sublen = i;
- }
- else {
- prog->subbeg = strbeg;
- prog->sublen = PL_regeol - strbeg; /* strend may have been modified */
- }
- }
-
- return 1;
-
-phooey:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n",
- PL_colors[4], PL_colors[5]));
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (swap) {
- /* we failed :-( roll it back */
- Safefree(prog->offs);
- prog->offs = swap;
- }
-
- return 0;
-}
-
-
-/*
- - regtry - try match at specific point
- */
-STATIC I32 /* 0 failure, 1 success */
-S_regtry(pTHX_ regmatch_info *reginfo, char **startpos)
-{
- dVAR;
- CHECKPOINT lastcp;
- REGEXP *const rx = reginfo->prog;
- regexp *const prog = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTRY;
-
- reginfo->cutpoint=NULL;
-
- if ((prog->extflags & RXf_EVAL_SEEN) && !PL_reg_eval_set) {
- MAGIC *mg;
-
- PL_reg_eval_set = RS_init;
- DEBUG_EXECUTE_r(DEBUG_s(
- PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n",
- (IV)(PL_stack_sp - PL_stack_base));
- ));
- SAVESTACK_CXPOS();
- cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base;
- /* Otherwise OP_NEXTSTATE will free whatever on stack now. */
- SAVETMPS;
- /* Apparently this is not needed, judging by wantarray. */
- /* SAVEI8(cxstack[cxstack_ix].blk_gimme);
- cxstack[cxstack_ix].blk_gimme = G_SCALAR; */
-
- if (reginfo->sv) {
- /* Make $_ available to executed code. */
- if (reginfo->sv != DEFSV) {
- SAVE_DEFSV;
- DEFSV_set(reginfo->sv);
- }
-
- if (!(SvTYPE(reginfo->sv) >= SVt_PVMG && SvMAGIC(reginfo->sv)
- && (mg = mg_find(reginfo->sv, PERL_MAGIC_regex_global)))) {
- /* prepare for quick setting of pos */
-#ifdef PERL_OLD_COPY_ON_WRITE
- if (SvIsCOW(reginfo->sv))
- sv_force_normal_flags(reginfo->sv, 0);
-#endif
- mg = sv_magicext(reginfo->sv, NULL, PERL_MAGIC_regex_global,
- &PL_vtbl_mglob, NULL, 0);
- mg->mg_len = -1;
- }
- PL_reg_magic = mg;
- PL_reg_oldpos = mg->mg_len;
- SAVEDESTRUCTOR_X(restore_pos, prog);
- }
- if (!PL_reg_curpm) {
- Newxz(PL_reg_curpm, 1, PMOP);
-#ifdef USE_ITHREADS
- {
- SV* const repointer = &PL_sv_undef;
- /* this regexp is also owned by the new PL_reg_curpm, which
- will try to free it. */
- av_push(PL_regex_padav, repointer);
- PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav);
- PL_regex_pad = AvARRAY(PL_regex_padav);
- }
-#endif
- }
-#ifdef USE_ITHREADS
- /* It seems that non-ithreads works both with and without this code.
- So for efficiency reasons it seems best not to have the code
- compiled when it is not needed. */
- /* This is safe against NULLs: */
- ReREFCNT_dec(PM_GETRE(PL_reg_curpm));
- /* PM_reg_curpm owns a reference to this regexp. */
- ReREFCNT_inc(rx);
-#endif
- PM_SETRE(PL_reg_curpm, rx);
- PL_reg_oldcurpm = PL_curpm;
- PL_curpm = PL_reg_curpm;
- if (RXp_MATCH_COPIED(prog)) {
- /* Here is a serious problem: we cannot rewrite subbeg,
- since it may be needed if this match fails. Thus
- $` inside (?{}) could fail... */
- PL_reg_oldsaved = prog->subbeg;
- PL_reg_oldsavedlen = prog->sublen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = prog->saved_copy;
-#endif
- RXp_MATCH_COPIED_off(prog);
- }
- else
- PL_reg_oldsaved = NULL;
- prog->subbeg = PL_bostr;
- prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */
- }
- DEBUG_EXECUTE_r(PL_reg_starttry = *startpos);
- prog->offs[0].start = *startpos - PL_bostr;
- PL_reginput = *startpos;
- PL_reglastparen = &prog->lastparen;
- PL_reglastcloseparen = &prog->lastcloseparen;
- prog->lastparen = 0;
- prog->lastcloseparen = 0;
- PL_regsize = 0;
- PL_regoffs = prog->offs;
- if (PL_reg_start_tmpl <= prog->nparens) {
- PL_reg_start_tmpl = prog->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- /* XXXX What this code is doing here?!!! There should be no need
- to do this again and again, PL_reglastparen should take care of
- this! --ilya*/
-
- /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code.
- * Actually, the code in regcppop() (which Ilya may be meaning by
- * PL_reglastparen), is not needed at all by the test suite
- * (op/regexp, op/pat, op/split), but that code is needed otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * Meanwhile, this code *is* needed for the
- * above-mentioned test suite tests to succeed. The common theme
- * on those tests seems to be returning null fields from matches.
- * --jhi updated by dapm */
-#if 1
- if (prog->nparens) {
- regexp_paren_pair *pp = PL_regoffs;
- register I32 i;
- for (i = prog->nparens; i > (I32)*PL_reglastparen; i--) {
- ++pp;
- pp->start = -1;
- pp->end = -1;
- }
- }
-#endif
- REGCP_SET(lastcp);
- if (regmatch(reginfo, progi->program + 1)) {
- PL_regoffs[0].end = PL_reginput - PL_bostr;
- return 1;
- }
- if (reginfo->cutpoint)
- *startpos= reginfo->cutpoint;
- REGCP_UNWIND(lastcp);
- return 0;
-}
-
-
-#define sayYES goto yes
-#define sayNO goto no
-#define sayNO_SILENT goto no_silent
-
-/* we dont use STMT_START/END here because it leads to
- "unreachable code" warnings, which are bogus, but distracting. */
-#define CACHEsayNO \
- if (ST.cache_mask) \
- PL_reg_poscache[ST.cache_offset] |= ST.cache_mask; \
- sayNO
-
-/* this is used to determine how far from the left messages like
- 'failed...' are printed. It should be set such that messages
- are inline with the regop output that created them.
-*/
-#define REPORT_CODE_OFF 32
-
-
-/* Make sure there is a test for this +1 options in re_tests */
-#define TRIE_INITAL_ACCEPT_BUFFLEN 4;
-
-#define CHRTEST_UNINIT -1001 /* c1/c2 haven't been calculated yet */
-#define CHRTEST_VOID -1000 /* the c1/c2 "next char" test should be skipped */
-
-#define SLAB_FIRST(s) (&(s)->states[0])
-#define SLAB_LAST(s) (&(s)->states[PERL_REGMATCH_SLAB_SLOTS-1])
-
-/* grab a new slab and return the first slot in it */
-
-STATIC regmatch_state *
-S_push_slab(pTHX)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- regmatch_slab *s = PL_regmatch_slab->next;
- if (!s) {
- Newx(s, 1, regmatch_slab);
- s->prev = PL_regmatch_slab;
- s->next = NULL;
- PL_regmatch_slab->next = s;
- }
- PL_regmatch_slab = s;
- return SLAB_FIRST(s);
-}
-
-
-/* push a new state then goto it */
-
-#define PUSH_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_state;
-
-/* push a new state with success backtracking, then goto it */
-
-#define PUSH_YES_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_yes_state;
-
-
-
-/*
-
-regmatch() - main matching routine
-
-This is basically one big switch statement in a loop. We execute an op,
-set 'next' to point the next op, and continue. If we come to a point which
-we may need to backtrack to on failure such as (A|B|C), we push a
-backtrack state onto the backtrack stack. On failure, we pop the top
-state, and re-enter the loop at the state indicated. If there are no more
-states to pop, we return failure.
-
-Sometimes we also need to backtrack on success; for example /A+/, where
-after successfully matching one A, we need to go back and try to
-match another one; similarly for lookahead assertions: if the assertion
-completes successfully, we backtrack to the state just before the assertion
-and then carry on. In these cases, the pushed state is marked as
-'backtrack on success too'. This marking is in fact done by a chain of
-pointers, each pointing to the previous 'yes' state. On success, we pop to
-the nearest yes state, discarding any intermediate failure-only states.
-Sometimes a yes state is pushed just to force some cleanup code to be
-called at the end of a successful match or submatch; e.g. (??{$re}) uses
-it to free the inner regex.
-
-Note that failure backtracking rewinds the cursor position, while
-success backtracking leaves it alone.
-
-A pattern is complete when the END op is executed, while a subpattern
-such as (?=foo) is complete when the SUCCESS op is executed. Both of these
-ops trigger the "pop to last yes state if any, otherwise return true"
-behaviour.
-
-A common convention in this function is to use A and B to refer to the two
-subpatterns (or to the first nodes thereof) in patterns like /A*B/: so A is
-the subpattern to be matched possibly multiple times, while B is the entire
-rest of the pattern. Variable and state names reflect this convention.
-
-The states in the main switch are the union of ops and failure/success of
-substates associated with with that op. For example, IFMATCH is the op
-that does lookahead assertions /(?=A)B/ and so the IFMATCH state means
-'execute IFMATCH'; while IFMATCH_A is a state saying that we have just
-successfully matched A and IFMATCH_A_fail is a state saying that we have
-just failed to match A. Resume states always come in pairs. The backtrack
-state we push is marked as 'IFMATCH_A', but when that is popped, we resume
-at IFMATCH_A or IFMATCH_A_fail, depending on whether we are backtracking
-on success or failure.
-
-The struct that holds a backtracking state is actually a big union, with
-one variant for each major type of op. The variable st points to the
-top-most backtrack struct. To make the code clearer, within each
-block of code we #define ST to alias the relevant union.
-
-Here's a concrete example of a (vastly oversimplified) IFMATCH
-implementation:
-
- switch (state) {
- ....
-
-#define ST st->u.ifmatch
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- ST.foo = ...; // some state we wish to save
- ...
- // push a yes backtrack state with a resume value of
- // IFMATCH_A/IFMATCH_A_fail, then continue execution at the
- // first node of A:
- PUSH_YES_STATE_GOTO(IFMATCH_A, A);
- // NOTREACHED
-
- case IFMATCH_A: // we have successfully executed A; now continue with B
- next = B;
- bar = ST.foo; // do something with the preserved value
- break;
-
- case IFMATCH_A_fail: // A failed, so the assertion failed
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
-
-#undef ST
-
- ...
- }
-
-For any old-timers reading this who are familiar with the old recursive
-approach, the code above is equivalent to:
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- {
- int foo = ...
- ...
- if (regmatch(A)) {
- next = B;
- bar = foo;
- break;
- }
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
- }
-
-The topmost backtrack state, pointed to by st, is usually free. If you
-want to claim it, populate any ST.foo fields in it with values you wish to
-save, then do one of
-
- PUSH_STATE_GOTO(resume_state, node);
- PUSH_YES_STATE_GOTO(resume_state, node);
-
-which sets that backtrack state's resume value to 'resume_state', pushes a
-new free entry to the top of the backtrack stack, then goes to 'node'.
-On backtracking, the free slot is popped, and the saved state becomes the
-new free state. An ST.foo field in this new top state can be temporarily
-accessed to retrieve values, but once the main loop is re-entered, it
-becomes available for reuse.
-
-Note that the depth of the backtrack stack constantly increases during the
-left-to-right execution of the pattern, rather than going up and down with
-the pattern nesting. For example the stack is at its maximum at Z at the
-end of the pattern, rather than at X in the following:
-
- /(((X)+)+)+....(Y)+....Z/
-
-The only exceptions to this are lookahead/behind assertions and the cut,
-(?>A), which pop all the backtrack states associated with A before
-continuing.
-
-Bascktrack state structs are allocated in slabs of about 4K in size.
-PL_regmatch_state and st always point to the currently active state,
-and PL_regmatch_slab points to the slab currently containing
-PL_regmatch_state. The first time regmatch() is called, the first slab is
-allocated, and is never freed until interpreter destruction. When the slab
-is full, a new one is allocated and chained to the end. At exit from
-regmatch(), slabs allocated since entry are freed.
-
-*/
-
-
-#define DEBUG_STATE_pp(pp) \
- DEBUG_STATE_r({ \
- DUMP_EXEC_POS(locinput, scan, do_utf8); \
- PerlIO_printf(Perl_debug_log, \
- " %*s"pp" %s%s%s%s%s\n", \
- depth*2, "", \
- PL_reg_name[st->resume_state], \
- ((st==yes_state||st==mark_state) ? "[" : ""), \
- ((st==yes_state) ? "Y" : ""), \
- ((st==mark_state) ? "M" : ""), \
- ((st==yes_state||st==mark_state) ? "]" : "") \
- ); \
- });
-
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-prog) : -1)
-
-#ifdef DEBUGGING
-
-STATIC void
-S_debug_start_match(pTHX_ const REGEXP *prog, const bool do_utf8,
- const char *start, const char *end, const char *blurb)
-{
- const bool utf8_pat = RX_UTF8(prog) ? 1 : 0;
-
- PERL_ARGS_ASSERT_DEBUG_START_MATCH;
-
- if (!PL_colorset)
- reginitcolors();
- {
- RE_PV_QUOTED_DECL(s0, utf8_pat, PERL_DEBUG_PAD_ZERO(0),
- RX_PRECOMP_const(prog), RX_PRELEN(prog), 60);
-
- RE_PV_QUOTED_DECL(s1, do_utf8, PERL_DEBUG_PAD_ZERO(1),
- start, end - start, 60);
-
- PerlIO_printf(Perl_debug_log,
- "%s%s REx%s %s against %s\n",
- PL_colors[4], blurb, PL_colors[5], s0, s1);
-
- if (do_utf8||utf8_pat)
- PerlIO_printf(Perl_debug_log, "UTF-8 %s%s%s...\n",
- utf8_pat ? "pattern" : "",
- utf8_pat && do_utf8 ? " and " : "",
- do_utf8 ? "string" : ""
- );
- }
-}
-
-STATIC void
-S_dump_exec_pos(pTHX_ const char *locinput,
- const regnode *scan,
- const char *loc_regeol,
- const char *loc_bostr,
- const char *loc_reg_starttry,
- const bool do_utf8)
-{
- const int docolor = *PL_colors[0] || *PL_colors[2] || *PL_colors[4];
- const int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */
- int l = (loc_regeol - locinput) > taill ? taill : (loc_regeol - locinput);
- /* The part of the string before starttry has one color
- (pref0_len chars), between starttry and current
- position another one (pref_len - pref0_len chars),
- after the current position the third one.
- We assume that pref0_len <= pref_len, otherwise we
- decrease pref0_len. */
- int pref_len = (locinput - loc_bostr) > (5 + taill) - l
- ? (5 + taill) - l : locinput - loc_bostr;
- int pref0_len;
-
- PERL_ARGS_ASSERT_DUMP_EXEC_POS;
-
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len)))
- pref_len++;
- pref0_len = pref_len - (locinput - loc_reg_starttry);
- if (l + pref_len < (5 + taill) && l < loc_regeol - locinput)
- l = ( loc_regeol - locinput > (5 + taill) - pref_len
- ? (5 + taill) - pref_len : loc_regeol - locinput);
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput + l)))
- l--;
- if (pref0_len < 0)
- pref0_len = 0;
- if (pref0_len > pref_len)
- pref0_len = pref_len;
- {
- const int is_uni = (do_utf8 && OP(scan) != CANY) ? 1 : 0;
-
- RE_PV_COLOR_DECL(s0,len0,is_uni,PERL_DEBUG_PAD(0),
- (locinput - pref_len),pref0_len, 60, 4, 5);
-
- RE_PV_COLOR_DECL(s1,len1,is_uni,PERL_DEBUG_PAD(1),
- (locinput - pref_len + pref0_len),
- pref_len - pref0_len, 60, 2, 3);
-
- RE_PV_COLOR_DECL(s2,len2,is_uni,PERL_DEBUG_PAD(2),
- locinput, loc_regeol - locinput, 10, 0, 1);
-
- const STRLEN tlen=len0+len1+len2;
- PerlIO_printf(Perl_debug_log,
- "%4"IVdf" <%.*s%.*s%s%.*s>%*s|",
- (IV)(locinput - loc_bostr),
- len0, s0,
- len1, s1,
- (docolor ? "" : "> <"),
- len2, s2,
- (int)(tlen > 19 ? 0 : 19 - tlen),
- "");
- }
-}
-
-#endif
-
-/* reg_check_named_buff_matched()
- * Checks to see if a named buffer has matched. The data array of
- * buffer numbers corresponding to the buffer is expected to reside
- * in the regexp->data->data array in the slot stored in the ARG() of
- * node involved. Note that this routine doesn't actually care about the
- * name, that information is not preserved from compilation to execution.
- * Returns the index of the leftmost defined buffer with the given name
- * or 0 if non of the buffers matched.
- */
-STATIC I32
-S_reg_check_named_buff_matched(pTHX_ const regexp *rex, const regnode *scan)
-{
- I32 n;
- RXi_GET_DECL(rex,rexi);
- SV *sv_dat= MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
-
- PERL_ARGS_ASSERT_REG_CHECK_NAMED_BUFF_MATCHED;
-
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- if ((I32)*PL_reglastparen >= nums[n] &&
- PL_regoffs[nums[n]].end != -1)
- {
- return nums[n];
- }
- }
- return 0;
-}
-
-
-/* free all slabs above current one - called during LEAVE_SCOPE */
-
-STATIC void
-S_clear_backtrack_stack(pTHX_ void *p)
-{
- regmatch_slab *s = PL_regmatch_slab->next;
- PERL_UNUSED_ARG(p);
-
- if (!s)
- return;
- PL_regmatch_slab->next = NULL;
- while (s) {
- regmatch_slab * const osl = s;
- s = s->next;
- Safefree(osl);
- }
-}
-
-
-#define SETREX(Re1,Re2) \
- if (PL_reg_eval_set) PM_SETRE((PL_reg_curpm), (Re2)); \
- Re1 = (Re2)
-
-STATIC I32 /* 0 failure, 1 success */
-S_regmatch(pTHX_ regmatch_info *reginfo, regnode *prog)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- dVAR;
- register const bool do_utf8 = PL_reg_match_utf8;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- REGEXP *rex_sv = reginfo->prog;
- regexp *rex = (struct regexp *)SvANY(rex_sv);
- RXi_GET_DECL(rex,rexi);
- I32 oldsave;
- /* the current state. This is a cached copy of PL_regmatch_state */
- register regmatch_state *st;
- /* cache heavy used fields of st in registers */
- register regnode *scan;
- register regnode *next;
- register U32 n = 0; /* general value; init to avoid compiler warning */
- register I32 ln = 0; /* len or last; init to avoid compiler warning */
- register char *locinput = PL_reginput;
- register I32 nextchr; /* is always set to UCHARAT(locinput) */
-
- bool result = 0; /* return value of S_regmatch */
- int depth = 0; /* depth of backtrack stack */
- U32 nochange_depth = 0; /* depth of GOSUB recursion with nochange */
- const U32 max_nochange_depth =
- (3 * rex->nparens > MAX_RECURSE_EVAL_NOCHANGE_DEPTH) ?
- 3 * rex->nparens : MAX_RECURSE_EVAL_NOCHANGE_DEPTH;
- regmatch_state *yes_state = NULL; /* state to pop to on success of
- subpattern */
- /* mark_state piggy backs on the yes_state logic so that when we unwind
- the stack on success we can update the mark_state as we go */
- regmatch_state *mark_state = NULL; /* last mark state we have seen */
- regmatch_state *cur_eval = NULL; /* most recent EVAL_AB state */
- struct regmatch_state *cur_curlyx = NULL; /* most recent curlyx */
- U32 state_num;
- bool no_final = 0; /* prevent failure from backtracking? */
- bool do_cutgroup = 0; /* no_final only until next branch/trie entry */
- char *startpoint = PL_reginput;
- SV *popmark = NULL; /* are we looking for a mark? */
- SV *sv_commit = NULL; /* last mark name seen in failure */
- SV *sv_yes_mark = NULL; /* last mark name we have seen
- during a successfull match */
- U32 lastopen = 0; /* last open we saw */
- bool has_cutgroup = RX_HAS_CUTGROUP(rex) ? 1 : 0;
- SV* const oreplsv = GvSV(PL_replgv);
- /* these three flags are set by various ops to signal information to
- * the very next op. They have a useful lifetime of exactly one loop
- * iteration, and are not preserved or restored by state pushes/pops
- */
- bool sw = 0; /* the condition value in (?(cond)a|b) */
- bool minmod = 0; /* the next "{n,m}" is a "{n,m}?" */
- int logical = 0; /* the following EVAL is:
- 0: (?{...})
- 1: (?(?{...})X|Y)
- 2: (??{...})
- or the following IFMATCH/UNLESSM is:
- false: plain (?=foo)
- true: used as a condition: (?(?=foo))
- */
-#ifdef DEBUGGING
- GET_RE_DEBUG_FLAGS_DECL;
-#endif
-
- PERL_ARGS_ASSERT_REGMATCH;
-
- DEBUG_OPTIMISE_r( DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,"regmatch start\n");
- }));
- /* on first ever call to regmatch, allocate first slab */
- if (!PL_regmatch_slab) {
- Newx(PL_regmatch_slab, 1, regmatch_slab);
- PL_regmatch_slab->prev = NULL;
- PL_regmatch_slab->next = NULL;
- PL_regmatch_state = SLAB_FIRST(PL_regmatch_slab);
- }
-
- oldsave = PL_savestack_ix;
- SAVEDESTRUCTOR_X(S_clear_backtrack_stack, NULL);
- SAVEVPTR(PL_regmatch_slab);
- SAVEVPTR(PL_regmatch_state);
-
- /* grab next free state slot */
- st = ++PL_regmatch_state;
- if (st > SLAB_LAST(PL_regmatch_slab))
- st = PL_regmatch_state = S_push_slab(aTHX);
-
- /* Note that nextchr is a byte even in UTF */
- nextchr = UCHARAT(locinput);
- scan = prog;
- while (scan != NULL) {
-
- DEBUG_EXECUTE_r( {
- SV * const prop = sv_newmortal();
- regnode *rnext=regnext(scan);
- DUMP_EXEC_POS( locinput, scan, do_utf8 );
- regprop(rex, prop, scan);
-
- PerlIO_printf(Perl_debug_log,
- "%3"IVdf":%*s%s(%"IVdf")\n",
- (IV)(scan - rexi->program), depth*2, "",
- SvPVX_const(prop),
- (PL_regkind[OP(scan)] == END || !rnext) ?
- 0 : (IV)(rnext - rexi->program));
- });
-
- next = scan + NEXT_OFF(scan);
- if (next == scan)
- next = NULL;
- state_num = OP(scan);
-
- reenter_switch:
-
- assert(PL_reglastparen == &rex->lastparen);
- assert(PL_reglastcloseparen == &rex->lastcloseparen);
- assert(PL_regoffs == rex->offs);
-
- switch (state_num) {
- case BOL:
- if (locinput == PL_bostr)
- {
- /* reginfo->till = reginfo->bol; */
- break;
- }
- sayNO;
- case MBOL:
- if (locinput == PL_bostr ||
- ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n'))
- {
- break;
- }
- sayNO;
- case SBOL:
- if (locinput == PL_bostr)
- break;
- sayNO;
- case GPOS:
- if (locinput == reginfo->ganch)
- break;
- sayNO;
-
- case KEEPS:
- /* update the startpoint */
- st->u.keeper.val = PL_regoffs[0].start;
- PL_reginput = locinput;
- PL_regoffs[0].start = locinput - PL_bostr;
- PUSH_STATE_GOTO(KEEPS_next, next);
- /*NOT-REACHED*/
- case KEEPS_next_fail:
- /* rollback the start point change */
- PL_regoffs[0].start = st->u.keeper.val;
- sayNO_SILENT;
- /*NOT-REACHED*/
- case EOL:
- goto seol;
- case MEOL:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- break;
- case SEOL:
- seol:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- if (PL_regeol - locinput > 1)
- sayNO;
- break;
- case EOS:
- if (PL_regeol != locinput)
- sayNO;
- break;
- case SANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
- case CANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case REG_ANY:
- if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n')
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
-
-#undef ST
-#define ST st->u.trie
- case TRIEC:
- /* In this case the charclass data is available inline so
- we can fail fast without a lot of extra overhead.
- */
- if (scan->flags == EXACT || !do_utf8) {
- if(!ANYOF_BITMAP_TEST(scan, *locinput)) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case TRIE:
- {
- /* what type of TRIE am I? (utf8 makes this contextual) */
- DECL_TRIE_TYPE(scan);
-
- /* what trie are we using right now */
- reg_trie_data * const trie
- = (reg_trie_data*)rexi->data->data[ ARG( scan ) ];
- HV * widecharmap = MUTABLE_HV(rexi->data->data[ ARG( scan ) + 1 ]);
- U32 state = trie->startstate;
-
- if (trie->bitmap && trie_type != trie_utf8_fold &&
- !TRIE_BITMAP_TEST(trie,*locinput)
- ) {
- if (trie->states[ state ].wordnum) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %smatched empty string...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- break;
- } else {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- }
- }
-
- {
- U8 *uc = ( U8* )locinput;
-
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- STRLEN bufflen=0;
- SV *sv_accept_buff = NULL;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- ST.accepted = 0; /* how many accepting states we have seen */
- ST.B = next;
- ST.jump = trie->jump;
- ST.me = scan;
- /*
- traverse the TRIE keeping track of all accepting states
- we transition through until we get to a failing node.
- */
-
- while ( state && uc <= (U8*)PL_regeol ) {
- U32 base = trie->states[ state ].trans.base;
- UV uvc = 0;
- U16 charid;
- /* We use charid to hold the wordnum as we don't use it
- for charid until after we have done the wordnum logic.
- We define an alias just so that the wordnum logic reads
- more naturally. */
-
-#define got_wordnum charid
- got_wordnum = trie->states[ state ].wordnum;
-
- if ( got_wordnum ) {
- if ( ! ST.accepted ) {
- ENTER;
- SAVETMPS; /* XXX is this necessary? dmq */
- bufflen = TRIE_INITAL_ACCEPT_BUFFLEN;
- sv_accept_buff=newSV(bufflen *
- sizeof(reg_trie_accepted) - 1);
- SvCUR_set(sv_accept_buff, 0);
- SvPOK_on(sv_accept_buff);
- sv_2mortal(sv_accept_buff);
- SAVETMPS;
- ST.accept_buff =
- (reg_trie_accepted*)SvPV_nolen(sv_accept_buff );
- }
- do {
- if (ST.accepted >= bufflen) {
- bufflen *= 2;
- ST.accept_buff =(reg_trie_accepted*)
- SvGROW(sv_accept_buff,
- bufflen * sizeof(reg_trie_accepted));
- }
- SvCUR_set(sv_accept_buff,SvCUR(sv_accept_buff)
- + sizeof(reg_trie_accepted));
-
-
- ST.accept_buff[ST.accepted].wordnum = got_wordnum;
- ST.accept_buff[ST.accepted].endpos = uc;
- ++ST.accepted;
- } while (trie->nextword && (got_wordnum= trie->nextword[got_wordnum]));
- }
-#undef got_wordnum
-
- DEBUG_TRIE_EXECUTE_r({
- DUMP_EXEC_POS( (char *)uc, scan, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%*s %sState: %4"UVxf" Accepted: %4"UVxf" ",
- 2+depth * 2, "", PL_colors[4],
- (UV)state, (UV)ST.accepted );
- });
-
- if ( base ) {
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
-
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state)
- {
- state = trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next;
- }
- else {
- state = 0;
- }
- uc += len;
-
- }
- else {
- state = 0;
- }
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "Charid:%3x CP:%4"UVxf" After State: %4"UVxf"%s\n",
- charid, uvc, (UV)state, PL_colors[5] );
- );
- }
- if (!ST.accepted )
- sayNO;
-
- DEBUG_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" possible matches%s\n",
- REPORT_CODE_OFF + depth * 2, "",
- PL_colors[4], (IV)ST.accepted, PL_colors[5] );
- );
- }}
- goto trie_first_try; /* jump into the fail handler */
- /* NOTREACHED */
- case TRIE_next_fail: /* we failed - try next alterative */
- if ( ST.jump) {
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- }
- trie_first_try:
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
-
- if ( ST.jump) {
- ST.lastparen = *PL_reglastparen;
- REGCP_SET(ST.cp);
- }
- if ( ST.accepted == 1 ) {
- /* only one choice left - just continue */
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ 0 ].wordnum-1, 0 );
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %sonly one match left: #%d <%s>%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[ 0 ].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- )
- : "not compiled under -Dr",
- PL_colors[5] );
- });
- PL_reginput = (char *)ST.accept_buff[ 0 ].endpos;
- /* in this case we free tmps/leave before we call regmatch
- as we wont be using accept_buff again. */
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- if ( !ST.jump || !ST.jump[ST.accept_buff[0].wordnum])
- scan = ST.B;
- else
- scan = ST.me + ST.jump[ST.accept_buff[0].wordnum];
- if (!has_cutgroup) {
- FREETMPS;
- LEAVE;
- } else {
- ST.accepted--;
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- }
-
- continue; /* execute rest of RE */
- }
-
- if ( !ST.accepted-- ) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sTRIE failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- FREETMPS;
- LEAVE;
- sayNO_SILENT;
- /*NOTREACHED*/
- }
-
- /*
- There are at least two accepting states left. Presumably
- the number of accepting states is going to be low,
- typically two. So we simply scan through to find the one
- with lowest wordnum. Once we find it, we swap the last
- state into its place and decrement the size. We then try to
- match the rest of the pattern at the point where the word
- ends. If we succeed, control just continues along the
- regex; if we fail we return here to try the next accepting
- state
- */
-
- {
- U32 best = 0;
- U32 cur;
- for( cur = 1 ; cur <= ST.accepted ; cur++ ) {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" (%d) as best, looking at %"IVdf" (%d)%s\n",
- REPORT_CODE_OFF + depth * 2, "", PL_colors[4],
- (IV)best, ST.accept_buff[ best ].wordnum, (IV)cur,
- ST.accept_buff[ cur ].wordnum, PL_colors[5] );
- );
-
- if (ST.accept_buff[cur].wordnum <
- ST.accept_buff[best].wordnum)
- best = cur;
- }
-
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ best ].wordnum - 1, 0 );
- regnode *nextop=(!ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) ?
- ST.B :
- ST.me + ST.jump[ST.accept_buff[best].wordnum];
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %strying alternation #%d <%s> at node #%d %s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[best].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- ) : "not compiled under -Dr",
- REG_NODE_NUM(nextop),
- PL_colors[5] );
- });
-
- if ( best<ST.accepted ) {
- reg_trie_accepted tmp = ST.accept_buff[ best ];
- ST.accept_buff[ best ] = ST.accept_buff[ ST.accepted ];
- ST.accept_buff[ ST.accepted ] = tmp;
- best = ST.accepted;
- }
- PL_reginput = (char *)ST.accept_buff[ best ].endpos;
- if ( !ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) {
- scan = ST.B;
- } else {
- scan = ST.me + ST.jump[ST.accept_buff[best].wordnum];
- }
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- /* NOTREACHED */
- }
- /* NOTREACHED */
- case TRIE_next:
- /* we dont want to throw this away, see bug 57042*/
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- FREETMPS;
- LEAVE;
- sayYES;
-#undef ST
-
- case EXACT: {
- char *s = STRING(scan);
- ln = STR_LEN(scan);
- if (do_utf8 != UTF) {
- /* The target and the pattern have differing utf8ness. */
- char *l = locinput;
- const char * const e = s + ln;
-
- if (do_utf8) {
- /* The target is utf8, the pattern is not utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*(U8*)s) !=
- utf8n_to_uvuni((U8*)l, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- l += ulen;
- s ++;
- }
- }
- else {
- /* The target is not utf8, the pattern is utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*((U8*)l)) !=
- utf8n_to_uvuni((U8*)s, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- s += ulen;
- l ++;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
- /* The target and the pattern have the same utf8ness. */
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr)
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && memNE(s, locinput, ln))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case EXACTFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case EXACTF: {
- char * const s = STRING(scan);
- ln = STR_LEN(scan);
-
- if (do_utf8 || UTF) {
- /* Either target or the pattern are utf8. */
- const char * const l = locinput;
- char *e = PL_regeol;
-
- if (ibcmp_utf8(s, 0, ln, (bool)UTF,
- l, &e, 0, do_utf8)) {
- /* One more case for the sharp s:
- * pack("U0U*", 0xDF) =~ /ss/i,
- * the 0xC3 0x9F are the UTF-8
- * byte sequence for the U+00DF. */
-
- if (!(do_utf8 &&
- toLOWER(s[0]) == 's' &&
- ln >= 2 &&
- toLOWER(s[1]) == 's' &&
- (U8)l[0] == 0xC3 &&
- e - l >= 2 &&
- (U8)l[1] == 0x9F))
- sayNO;
- }
- locinput = e;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Neither the target and the pattern are utf8. */
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- UCHARAT(s) != ((OP(scan) == EXACTF)
- ? PL_fold : PL_fold_locale)[nextchr])
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && (OP(scan) == EXACTF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln)))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case BOUNDL:
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- case NBOUND:
- /* was last char in word? */
- if (do_utf8) {
- if (locinput == PL_bostr)
- ln = '\n';
- else {
- const U8 * const r = reghop3((U8*)locinput, -1, (U8*)PL_bostr);
-
- ln = utf8n_to_uvchr(r, UTF8SKIP(r), 0, uniflags);
- }
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM_uni(ln);
- LOAD_UTF8_CHARCLASS_ALNUM();
- n = swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8);
- }
- else {
- ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln));
- n = isALNUM_LC_utf8((U8*)locinput);
- }
- }
- else {
- ln = (locinput != PL_bostr) ?
- UCHARAT(locinput - 1) : '\n';
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM(ln);
- n = isALNUM(nextchr);
- }
- else {
- ln = isALNUM_LC(ln);
- n = isALNUM_LC(nextchr);
- }
- }
- if (((!ln) == (!n)) == (OP(scan) == BOUND ||
- OP(scan) == BOUNDL))
- sayNO;
- break;
- case ANYOF:
- if (do_utf8) {
- STRLEN inclasslen = PL_regeol - locinput;
-
- if (!reginclass(rex, scan, (U8*)locinput, &inclasslen, do_utf8))
- goto anyof_fail;
- if (locinput >= PL_regeol)
- sayNO;
- locinput += inclasslen ? inclasslen : UTF8SKIP(locinput);
- nextchr = UCHARAT(locinput);
- break;
- }
- else {
- if (nextchr < 0)
- nextchr = UCHARAT(locinput);
- if (!REGINCLASS(rex, scan, (U8*)locinput))
- goto anyof_fail;
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- }
- anyof_fail:
- /* If we might have the case of the German sharp s
- * in a casefolding Unicode character class. */
-
- if (ANYOF_FOLD_SHARP_S(scan, locinput, PL_regeol)) {
- locinput += SHARP_S_SKIP;
- nextchr = UCHARAT(locinput);
- }
- else
- sayNO;
- break;
- /* Special char classes - The defines start on line 129 or so */
- CCC_TRY_AFF( ALNUM, ALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
- CCC_TRY_NEG(NALNUM, NALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
-
- CCC_TRY_AFF( SPACE, SPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
- CCC_TRY_NEG(NSPACE, NSPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
-
- CCC_TRY_AFF( DIGIT, DIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
- CCC_TRY_NEG(NDIGIT, NDIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
-
- case CLUMP: /* Match \X: logical Unicode character. This is defined as
- a Unicode extended Grapheme Cluster */
- /* From http://www.unicode.org/reports/tr29 (5.2 version). An
- extended Grapheme Cluster is:
-
- CR LF
- | Prepend* Begin Extend*
- | .
-
- Begin is (Hangul-syllable | ! Control)
- Extend is (Grapheme_Extend | Spacing_Mark)
- Control is [ GCB_Control CR LF ]
-
- The discussion below shows how the code for CLUMP is derived
- from this regex. Note that most of these concepts are from
- property values of the Grapheme Cluster Boundary (GCB) property.
- No code point can have multiple property values for a given
- property. Thus a code point in Prepend can't be in Control, but
- it must be in !Control. This is why Control above includes
- GCB_Control plus CR plus LF. The latter two are used in the GCB
- property separately, and so can't be in GCB_Control, even though
- they logically are controls. Control is not the same as gc=cc,
- but includes format and other characters as well.
-
- The Unicode definition of Hangul-syllable is:
- L+
- | (L* ( ( V | LV ) V* | LVT ) T*)
- | T+
- )
- Each of these is a value for the GCB property, and hence must be
- disjoint, so the order they are tested is immaterial, so the
- above can safely be changed to
- T+
- | L+
- | (L* ( LVT | ( V | LV ) V*) T*)
-
- The last two terms can be combined like this:
- L* ( L
- | (( LVT | ( V | LV ) V*) T*))
-
- And refactored into this:
- L* (L | LVT T* | V V* T* | LV V* T*)
-
- That means that if we have seen any L's at all we can quit
- there, but if the next character is a LVT, a V or and LV we
- should keep going.
-
- There is a subtlety with Prepend* which showed up in testing.
- Note that the Begin, and only the Begin is required in:
- | Prepend* Begin Extend*
- Also, Begin contains '! Control'. A Prepend must be a '!
- Control', which means it must be a Begin. What it comes down to
- is that if we match Prepend* and then find no suitable Begin
- afterwards, that if we backtrack the last Prepend, that one will
- be a suitable Begin.
- */
-
- if (locinput >= PL_regeol)
- sayNO;
- if (! do_utf8) {
-
- /* Match either CR LF or '.', as all the other possibilities
- * require utf8 */
- locinput++; /* Match the . or CR */
- if (nextchr == '\r'
- && locinput < PL_regeol
- && UCHARAT(locinput) == '\n') locinput++;
- }
- else {
-
- /* Utf8: See if is ( CR LF ); already know that locinput <
- * PL_regeol, so locinput+1 is in bounds */
- if (nextchr == '\r' && UCHARAT(locinput + 1) == '\n') {
- locinput += 2;
- }
- else {
- /* In case have to backtrack to beginning, then match '.' */
- char *starting = locinput;
-
- /* In case have to backtrack the last prepend */
- char *previous_prepend = 0;
-
- LOAD_UTF8_CHARCLASS_GCB();
-
- /* Match (prepend)* */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_prepend,
- (U8*)locinput, do_utf8))
- {
- previous_prepend = locinput;
- locinput += UTF8SKIP(locinput);
- }
-
- /* As noted above, if we matched a prepend character, but
- * the next thing won't match, back off the last prepend we
- * matched, as it is guaranteed to match the begin */
- if (previous_prepend
- && (locinput >= PL_regeol
- || ! swash_fetch(PL_utf8_X_begin,
- (U8*)locinput, do_utf8)))
- {
- locinput = previous_prepend;
- }
-
- /* Note that here we know PL_regeol > locinput, as we
- * tested that upon input to this switch case, and if we
- * moved locinput forward, we tested the result just above
- * and it either passed, or we backed off so that it will
- * now pass */
- if (! swash_fetch(PL_utf8_X_begin, (U8*)locinput, do_utf8)) {
-
- /* Here did not match the required 'Begin' in the
- * second term. So just match the very first
- * character, the '.' of the final term of the regex */
- locinput = starting + UTF8SKIP(starting);
- } else {
-
- /* Here is the beginning of a character that can have
- * an extender. It is either a hangul syllable, or a
- * non-control */
- if (swash_fetch(PL_utf8_X_non_hangul,
- (U8*)locinput, do_utf8))
- {
-
- /* Here not a Hangul syllable, must be a
- * ('! * Control') */
- locinput += UTF8SKIP(locinput);
- } else {
-
- /* Here is a Hangul syllable. It can be composed
- * of several individual characters. One
- * possibility is T+ */
- if (swash_fetch(PL_utf8_X_T,
- (U8*)locinput, do_utf8))
- {
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_T,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- } else {
-
- /* Here, not T+, but is a Hangul. That means
- * it is one of the others: L, LV, LVT or V,
- * and matches:
- * L* (L | LVT T* | V V* T* | LV V* T*) */
-
- /* Match L* */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_L,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
-
- /* Here, have exhausted L*. If the next
- * character is not an LV, LVT nor V, it means
- * we had to have at least one L, so matches L+
- * in the original equation, we have a complete
- * hangul syllable. Are done. */
-
- if (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_LV_LVT_V,
- (U8*)locinput, do_utf8))
- {
-
- /* Otherwise keep going. Must be LV, LVT
- * or V. See if LVT */
- if (swash_fetch(PL_utf8_X_LVT,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- } else {
-
- /* Must be V or LV. Take it, then
- * match V* */
- locinput += UTF8SKIP(locinput);
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_V,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- }
-
- /* And any of LV, LVT, or V can be followed
- * by T* */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_T,
- (U8*)locinput,
- do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- }
- }
- }
-
- /* Match any extender */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_extend,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- }
- }
- if (locinput > PL_regeol) sayNO;
- }
- nextchr = UCHARAT(locinput);
- break;
-
- case NREFFL:
- {
- char *s;
- char type;
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NREF:
- case NREFF:
- type = OP(scan);
- n = reg_check_named_buff_matched(rex,scan);
-
- if ( n ) {
- type = REF + ( type - NREF );
- goto do_ref;
- } else {
- sayNO;
- }
- /* unreached */
- case REFFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case REF:
- case REFF:
- n = ARG(scan); /* which paren pair */
- type = OP(scan);
- do_ref:
- ln = PL_regoffs[n].start;
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (*PL_reglastparen < n || ln == -1)
- sayNO; /* Do not match unless seen CLOSEn. */
- if (ln == PL_regoffs[n].end)
- break;
-
- s = PL_bostr + ln;
- if (do_utf8 && type != REF) { /* REF can do byte comparison */
- char *l = locinput;
- const char *e = PL_bostr + PL_regoffs[n].end;
- /*
- * Note that we can't do the "other character" lookup trick as
- * in the 8-bit case (no pun intended) because in Unicode we
- * have to map both upper and title case to lower case.
- */
- if (type == REFF) {
- while (s < e) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- if (l >= PL_regeol)
- sayNO;
- toLOWER_utf8((U8*)s, tmpbuf1, &ulen1);
- toLOWER_utf8((U8*)l, tmpbuf2, &ulen2);
- if (ulen1 != ulen2 || memNE((char *)tmpbuf1, (char *)tmpbuf2, ulen1))
- sayNO;
- s += ulen1;
- l += ulen2;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- (type == REF ||
- (UCHARAT(s) != (type == REFF
- ? PL_fold : PL_fold_locale)[nextchr])))
- sayNO;
- ln = PL_regoffs[n].end - ln;
- if (locinput + ln > PL_regeol)
- sayNO;
- if (ln > 1 && (type == REF
- ? memNE(s, locinput, ln)
- : (type == REFF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln))))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case NOTHING:
- case TAIL:
- break;
- case BACK:
- break;
-
-#undef ST
-#define ST st->u.eval
- {
- SV *ret;
- REGEXP *re_sv;
- regexp *re;
- regexp_internal *rei;
- regnode *startpoint;
-
- case GOSTART:
- case GOSUB: /* /(...(?1))/ /(...(?&foo))/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if (cur_eval->u.eval.close_paren == (U32)ARG(scan))
- Perl_croak(aTHX_ "Infinite recursion in regex");
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_
- "Pattern subroutine nesting without pos change"
- " exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- re_sv = rex_sv;
- re = rex;
- rei = rexi;
- (void)ReREFCNT_inc(rex_sv);
- if (OP(scan)==GOSUB) {
- startpoint = scan + ARG2L(scan);
- ST.close_paren = ARG(scan);
- } else {
- startpoint = rei->program+1;
- ST.close_paren = 0;
- }
- goto eval_recurse_doit;
- /* NOTREACHED */
- case EVAL: /* /(?{A})B/ /(??{A})B/ and /(?(?{A})X|Y)B/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_ "EVAL without pos change exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- {
- /* execute the code in the {...} */
- dSP;
- SV ** const before = SP;
- OP_4tree * const oop = PL_op;
- COP * const ocurcop = PL_curcop;
- PAD *old_comppad;
- char *saved_regeol = PL_regeol;
-
- n = ARG(scan);
- PL_op = (OP_4tree*)rexi->data->data[n];
- DEBUG_STATE_r( PerlIO_printf(Perl_debug_log,
- " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) );
- PAD_SAVE_LOCAL(old_comppad, (PAD*)rexi->data->data[n + 2]);
- PL_regoffs[0].end = PL_reg_magic->mg_len = locinput - PL_bostr;
-
- if (sv_yes_mark) {
- SV *sv_mrk = get_sv("REGMARK", 1);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- CALLRUNOPS(aTHX); /* Scalar context. */
- SPAGAIN;
- if (SP == before)
- ret = &PL_sv_undef; /* protect against empty (?{}) blocks. */
- else {
- ret = POPs;
- PUTBACK;
- }
-
- PL_op = oop;
- PAD_RESTORE_LOCAL(old_comppad);
- PL_curcop = ocurcop;
- PL_regeol = saved_regeol;
- if (!logical) {
- /* /(?{...})/ */
- sv_setsv(save_scalar(PL_replgv), ret);
- break;
- }
- }
- if (logical == 2) { /* Postponed subexpression: /(??{...})/ */
- logical = 0;
- {
- /* extract RE object from returned value; compiling if
- * necessary */
- MAGIC *mg = NULL;
- REGEXP *rx = NULL;
-
- if (SvROK(ret)) {
- SV *const sv = SvRV(ret);
-
- if (SvTYPE(sv) == SVt_REGEXP) {
- rx = (REGEXP*) sv;
- } else if (SvSMAGICAL(sv)) {
- mg = mg_find(sv, PERL_MAGIC_qr);
- assert(mg);
- }
- } else if (SvTYPE(ret) == SVt_REGEXP) {
- rx = (REGEXP*) ret;
- } else if (SvSMAGICAL(ret)) {
- if (SvGMAGICAL(ret)) {
- /* I don't believe that there is ever qr magic
- here. */
- assert(!mg_find(ret, PERL_MAGIC_qr));
- sv_unmagic(ret, PERL_MAGIC_qr);
- }
- else {
- mg = mg_find(ret, PERL_MAGIC_qr);
- /* testing suggests mg only ends up non-NULL for
- scalars who were upgraded and compiled in the
- else block below. In turn, this is only
- triggered in the "postponed utf8 string" tests
- in t/op/pat.t */
- }
- }
-
- if (mg) {
- rx = (REGEXP *) mg->mg_obj; /*XXX:dmq*/
- assert(rx);
- }
- if (rx) {
- rx = reg_temp_copy(NULL, rx);
- }
- else {
- U32 pm_flags = 0;
- const I32 osize = PL_regsize;
-
- if (DO_UTF8(ret)) {
- assert (SvUTF8(ret));
- } else if (SvUTF8(ret)) {
- /* Not doing UTF-8, despite what the SV says. Is
- this only if we're trapped in use 'bytes'? */
- /* Make a copy of the octet sequence, but without
- the flag on, as the compiler now honours the
- SvUTF8 flag on ret. */
- STRLEN len;
- const char *const p = SvPV(ret, len);
- ret = newSVpvn_flags(p, len, SVs_TEMP);
- }
- rx = CALLREGCOMP(ret, pm_flags);
- if (!(SvFLAGS(ret)
- & (SVs_TEMP | SVs_PADTMP | SVf_READONLY
- | SVs_GMG))) {
- /* This isn't a first class regexp. Instead, it's
- caching a regexp onto an existing, Perl visible
- scalar. */
- sv_magic(ret, MUTABLE_SV(rx), PERL_MAGIC_qr, 0, 0);
- }
- PL_regsize = osize;
- }
- re_sv = rx;
- re = (struct regexp *)SvANY(rx);
- }
- RXp_MATCH_COPIED_off(re);
- re->subbeg = rex->subbeg;
- re->sublen = rex->sublen;
- rei = RXi_GET(re);
- DEBUG_EXECUTE_r(
- debug_start_match(re_sv, do_utf8, locinput, PL_regeol,
- "Matching embedded");
- );
- startpoint = rei->program + 1;
- ST.close_paren = 0; /* only used for GOSUB */
- /* borrowed from regtry */
- if (PL_reg_start_tmpl <= re->nparens) {
- PL_reg_start_tmpl = re->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- eval_recurse_doit: /* Share code with GOSUB below this line */
- /* run the pattern returned from (??{...}) */
- ST.cp = regcppush(0); /* Save *all* the positions. */
- REGCP_SET(ST.lastcp);
-
- PL_regoffs = re->offs; /* essentially NOOP on GOSUB */
-
- /* see regtry, specifically PL_reglast(?:close)?paren is a pointer! (i dont know why) :dmq */
- PL_reglastparen = &re->lastparen;
- PL_reglastcloseparen = &re->lastcloseparen;
- re->lastparen = 0;
- re->lastcloseparen = 0;
-
- PL_reginput = locinput;
- PL_regsize = 0;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
-
- ST.toggle_reg_flags = PL_reg_flags;
- if (RX_UTF8(re_sv))
- PL_reg_flags |= RF_utf8;
- else
- PL_reg_flags &= ~RF_utf8;
- ST.toggle_reg_flags ^= PL_reg_flags; /* diff of old and new */
-
- ST.prev_rex = rex_sv;
- ST.prev_curlyx = cur_curlyx;
- SETREX(rex_sv,re_sv);
- rex = re;
- rexi = rei;
- cur_curlyx = NULL;
- ST.B = next;
- ST.prev_eval = cur_eval;
- cur_eval = st;
- /* now continue from first node in postoned RE */
- PUSH_YES_STATE_GOTO(EVAL_AB, startpoint);
- /* NOTREACHED */
- }
- /* logical is 1, /(?(?{...})X|Y)/ */
- sw = (bool)SvTRUE(ret);
- logical = 0;
- break;
- }
-
- case EVAL_AB: /* cleanup after a successful (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- regcpblow(ST.cp);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
- /* also update PL_regoffs */
- PL_regoffs = rex->offs;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayYES;
-
-
- case EVAL_AB_fail: /* unsuccessfully ran A or B in (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- PL_reginput = locinput;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayNO_SILENT;
-#undef ST
-
- case OPEN:
- n = ARG(scan); /* which paren pair */
- PL_reg_start_tmp[n] = locinput;
- if (n > PL_regsize)
- PL_regsize = n;
- lastopen = n;
- break;
- case CLOSE:
- n = ARG(scan); /* which paren pair */
- PL_regoffs[n].start = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if (cur_eval && cur_eval->u.eval.close_paren == n) {
- goto fake_end;
- }
- break;
- case ACCEPT:
- if (ARG(scan)){
- regnode *cursor;
- for (cursor=scan;
- cursor && OP(cursor)!=END;
- cursor=regnext(cursor))
- {
- if ( OP(cursor)==CLOSE ){
- n = ARG(cursor);
- if ( n <= lastopen ) {
- PL_regoffs[n].start
- = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if ( n == ARG(scan) || (cur_eval &&
- cur_eval->u.eval.close_paren == n))
- break;
- }
- }
- }
- }
- goto fake_end;
- /*NOTREACHED*/
- case GROUPP:
- n = ARG(scan); /* which paren pair */
- sw = (bool)(*PL_reglastparen >= n && PL_regoffs[n].end != -1);
- break;
- case NGROUPP:
- /* reg_check_named_buff_matched returns 0 for no match */
- sw = (bool)(0 < reg_check_named_buff_matched(rex,scan));
- break;
- case INSUBP:
- n = ARG(scan);
- sw = (cur_eval && (!n || cur_eval->u.eval.close_paren == n));
- break;
- case DEFINEP:
- sw = 0;
- break;
- case IFTHEN:
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (sw)
- next = NEXTOPER(NEXTOPER(scan));
- else {
- next = scan + ARG(scan);
- if (OP(next) == IFTHEN) /* Fake one. */
- next = NEXTOPER(NEXTOPER(next));
- }
- break;
- case LOGICAL:
- logical = scan->flags;
- break;
-
-/*******************************************************************
-
-The CURLYX/WHILEM pair of ops handle the most generic case of the /A*B/
-pattern, where A and B are subpatterns. (For simple A, CURLYM or
-STAR/PLUS/CURLY/CURLYN are used instead.)
-
-A*B is compiled as <CURLYX><A><WHILEM><B>
-
-On entry to the subpattern, CURLYX is called. This pushes a CURLYX
-state, which contains the current count, initialised to -1. It also sets
-cur_curlyx to point to this state, with any previous value saved in the
-state block.
-
-CURLYX then jumps straight to the WHILEM op, rather than executing A,
-since the pattern may possibly match zero times (i.e. it's a while {} loop
-rather than a do {} while loop).
-
-Each entry to WHILEM represents a successful match of A. The count in the
-CURLYX block is incremented, another WHILEM state is pushed, and execution
-passes to A or B depending on greediness and the current count.
-
-For example, if matching against the string a1a2a3b (where the aN are
-substrings that match /A/), then the match progresses as follows: (the
-pushed states are interspersed with the bits of strings matched so far):
-
- <CURLYX cnt=-1>
- <CURLYX cnt=0><WHILEM>
- <CURLYX cnt=1><WHILEM> a1 <WHILEM>
- <CURLYX cnt=2><WHILEM> a1 <WHILEM> a2 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> b
-
-(Contrast this with something like CURLYM, which maintains only a single
-backtrack state:
-
- <CURLYM cnt=0> a1
- a1 <CURLYM cnt=1> a2
- a1 a2 <CURLYM cnt=2> a3
- a1 a2 a3 <CURLYM cnt=3> b
-)
-
-Each WHILEM state block marks a point to backtrack to upon partial failure
-of A or B, and also contains some minor state data related to that
-iteration. The CURLYX block, pointed to by cur_curlyx, contains the
-overall state, such as the count, and pointers to the A and B ops.
-
-This is complicated slightly by nested CURLYX/WHILEM's. Since cur_curlyx
-must always point to the *current* CURLYX block, the rules are:
-
-When executing CURLYX, save the old cur_curlyx in the CURLYX state block,
-and set cur_curlyx to point the new block.
-
-When popping the CURLYX block after a successful or unsuccessful match,
-restore the previous cur_curlyx.
-
-When WHILEM is about to execute B, save the current cur_curlyx, and set it
-to the outer one saved in the CURLYX block.
-
-When popping the WHILEM block after a successful or unsuccessful B match,
-restore the previous cur_curlyx.
-
-Here's an example for the pattern (AI* BI)*BO
-I and O refer to inner and outer, C and W refer to CURLYX and WHILEM:
-
-cur_
-curlyx backtrack stack
------- ---------------
-NULL
-CO <CO prev=NULL> <WO>
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-NULL <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi <WO prev=CO> bo
-
-At this point the pattern succeeds, and we work back down the stack to
-clean up, restoring as we go:
-
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO>
-NULL
-
-*******************************************************************/
-
-#define ST st->u.curlyx
-
- case CURLYX: /* start of /A*B/ (for complex A) */
- {
- /* No need to save/restore up to this paren */
- I32 parenfloor = scan->flags;
-
- assert(next); /* keep Coverity happy */
- if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */
- next += ARG(next);
-
- /* XXXX Probably it is better to teach regpush to support
- parenfloor > PL_regsize... */
- if (parenfloor > (I32)*PL_reglastparen)
- parenfloor = *PL_reglastparen; /* Pessimization... */
-
- ST.prev_curlyx= cur_curlyx;
- cur_curlyx = st;
- ST.cp = PL_savestack_ix;
-
- /* these fields contain the state of the current curly.
- * they are accessed by subsequent WHILEMs */
- ST.parenfloor = parenfloor;
- ST.min = ARG1(scan);
- ST.max = ARG2(scan);
- ST.A = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- ST.B = next;
- ST.minmod = minmod;
- minmod = 0;
- ST.count = -1; /* this will be updated by WHILEM */
- ST.lastloc = NULL; /* this will be updated by WHILEM */
-
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYX_end, PREVOPER(next));
- /* NOTREACHED */
- }
-
- case CURLYX_end: /* just finished matching all of A*B */
- cur_curlyx = ST.prev_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case CURLYX_end_fail: /* just failed to match all of A*B */
- regcpblow(ST.cp);
- cur_curlyx = ST.prev_curlyx;
- sayNO;
- /* NOTREACHED */
-
-
-#undef ST
-#define ST st->u.whilem
-
- case WHILEM: /* just matched an A in /A*B/ (for complex A) */
- {
- /* see the discussion above about CURLYX/WHILEM */
- I32 n;
- assert(cur_curlyx); /* keep Coverity happy */
- n = ++cur_curlyx->u.curlyx.count; /* how many A's matched */
- ST.save_lastloc = cur_curlyx->u.curlyx.lastloc;
- ST.cache_offset = 0;
- ST.cache_mask = 0;
-
- PL_reginput = locinput;
-
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: matched %ld out of %ld..%ld\n",
- REPORT_CODE_OFF+depth*2, "", (long)n,
- (long)cur_curlyx->u.curlyx.min,
- (long)cur_curlyx->u.curlyx.max)
- );
-
- /* First just match a string of min A's. */
-
- if (n < cur_curlyx->u.curlyx.min) {
- cur_curlyx->u.curlyx.lastloc = locinput;
- PUSH_STATE_GOTO(WHILEM_A_pre, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
-
- /* If degenerate A matches "", assume A done. */
-
- if (locinput == cur_curlyx->u.curlyx.lastloc) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: empty match detected, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- goto do_whilem_B_max;
- }
-
- /* super-linear cache processing */
-
- if (scan->flags) {
-
- if (!PL_reg_maxiter) {
- /* start the countdown: Postpone detection until we
- * know the match is not *that* much linear. */
- PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4);
- /* possible overflow for long strings and many CURLYX's */
- if (PL_reg_maxiter < 0)
- PL_reg_maxiter = I32_MAX;
- PL_reg_leftiter = PL_reg_maxiter;
- }
-
- if (PL_reg_leftiter-- == 0) {
- /* initialise cache */
- const I32 size = (PL_reg_maxiter + 7)/8;
- if (PL_reg_poscache) {
- if ((I32)PL_reg_poscache_size < size) {
- Renew(PL_reg_poscache, size, char);
- PL_reg_poscache_size = size;
- }
- Zero(PL_reg_poscache, size, char);
- }
- else {
- PL_reg_poscache_size = size;
- Newxz(PL_reg_poscache, size, char);
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%swhilem: Detected a super-linear match, switching on caching%s...\n",
- PL_colors[4], PL_colors[5])
- );
- }
-
- if (PL_reg_leftiter < 0) {
- /* have we already failed at this position? */
- I32 offset, mask;
- offset = (scan->flags & 0xf) - 1
- + (locinput - PL_bostr) * (scan->flags>>4);
- mask = 1 << (offset % 8);
- offset /= 8;
- if (PL_reg_poscache[offset] & mask) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: (cache) already tried at this position...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- sayNO; /* cache records failure */
- }
- ST.cache_offset = offset;
- ST.cache_mask = mask;
- }
- }
-
- /* Prefer B over A for minimal matching. */
-
- if (cur_curlyx->u.curlyx.minmod) {
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- ST.cp = regcppush(ST.save_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_YES_STATE_GOTO(WHILEM_B_min, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
- }
-
- /* Prefer A over B for maximal matching. */
-
- if (n < cur_curlyx->u.curlyx.max) { /* More greed allowed? */
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- cur_curlyx->u.curlyx.lastloc = locinput;
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_max, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
- goto do_whilem_B_max;
- }
- /* NOTREACHED */
-
- case WHILEM_B_min: /* just matched B in a minimal match */
- case WHILEM_B_max: /* just matched B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case WHILEM_B_max_fail: /* just failed to match B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_min_fail: /* just failed to match A in a minimal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- /* FALL THROUGH */
- case WHILEM_A_pre_fail: /* just failed to match even minimal A */
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_max_fail: /* just failed to match A in a maximal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex); /* Restore some previous $<digit>s? */
- PL_reginput = locinput;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s whilem: failed, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- do_whilem_B_max:
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
-
- /* now try B */
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- PUSH_YES_STATE_GOTO(WHILEM_B_max, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
-
- case WHILEM_B_min_fail: /* just failed to match B in a minimal match */
- cur_curlyx = ST.save_curlyx;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
-
- if (cur_curlyx->u.curlyx.count >= cur_curlyx->u.curlyx.max) {
- /* Maximum greed exceeded */
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP),
- "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s trying longer...\n", REPORT_CODE_OFF+depth*2, "")
- );
- /* Try grabbing another A and see if it helps. */
- PL_reginput = locinput;
- cur_curlyx->u.curlyx.lastloc = locinput;
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_min, ST.save_curlyx->u.curlyx.A);
- /* NOTREACHED */
-
-#undef ST
-#define ST st->u.branch
-
- case BRANCHJ: /* /(...|A|...)/ with long next pointer */
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- scan = NEXTOPER(scan);
- /* FALL THROUGH */
-
- case BRANCH: /* /(...|A|...)/ */
- scan = NEXTOPER(scan); /* scan now points to inner node */
- ST.lastparen = *PL_reglastparen;
- ST.next_branch = next;
- REGCP_SET(ST.cp);
- PL_reginput = locinput;
-
- /* Now go into the branch */
- if (has_cutgroup) {
- PUSH_YES_STATE_GOTO(BRANCH_next, scan);
- } else {
- PUSH_STATE_GOTO(BRANCH_next, scan);
- }
- /* NOTREACHED */
- case CUTGROUP:
- PL_reginput = locinput;
- sv_yes_mark = st->u.mark.mark_name = scan->flags ? NULL :
- MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(CUTGROUP_next,next);
- /* NOTREACHED */
- case CUTGROUP_next_fail:
- do_cutgroup = 1;
- no_final = 1;
- if (st->u.mark.mark_name)
- sv_commit = st->u.mark.mark_name;
- sayNO;
- /* NOTREACHED */
- case BRANCH_next:
- sayYES;
- /* NOTREACHED */
- case BRANCH_next_fail: /* that branch failed; try the next, if any */
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- /*dmq: *PL_reglastcloseparen = n; */
- scan = ST.next_branch;
- /* no more branches? */
- if (!scan || (OP(scan) != BRANCH && OP(scan) != BRANCHJ)) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sBRANCH failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- sayNO_SILENT;
- }
- continue; /* execute next BRANCH[J] op */
- /* NOTREACHED */
-
- case MINMOD:
- minmod = 1;
- break;
-
-#undef ST
-#define ST st->u.curlym
-
- case CURLYM: /* /A{m,n}B/ where A is fixed-length */
-
- /* This is an optimisation of CURLYX that enables us to push
- * only a single backtracking state, no matter how many matches
- * there are in {m,n}. It relies on the pattern being constant
- * length, with no parens to influence future backrefs
- */
-
- ST.me = scan;
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
-
- /* if paren positive, emulate an OPEN/CLOSE around A */
- if (ST.me->flags) {
- U32 paren = ST.me->flags;
- if (paren > PL_regsize)
- PL_regsize = paren;
- if (paren > *PL_reglastparen)
- *PL_reglastparen = paren;
- scan += NEXT_OFF(scan); /* Skip former OPEN. */
- }
- ST.A = scan;
- ST.B = next;
- ST.alen = 0;
- ST.count = 0;
- ST.minmod = minmod;
- minmod = 0;
- ST.c1 = CHRTEST_UNINIT;
- REGCP_SET(ST.cp);
-
- if (!(ST.minmod ? ARG1(ST.me) : ARG2(ST.me))) /* min/max */
- goto curlym_do_B;
-
- curlym_do_A: /* execute the A in /A{m,n}B/ */
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYM_A, ST.A); /* match A */
- /* NOTREACHED */
-
- case CURLYM_A: /* we've just matched an A */
- locinput = st->locinput;
- nextchr = UCHARAT(locinput);
-
- ST.count++;
- /* after first match, determine A's length: u.curlym.alen */
- if (ST.count == 1) {
- if (PL_reg_match_utf8) {
- char *s = locinput;
- while (s < PL_reginput) {
- ST.alen++;
- s += UTF8SKIP(s);
- }
- }
- else {
- ST.alen = PL_reginput - locinput;
- }
- if (ST.alen == 0)
- ST.count = ST.minmod ? ARG1(ST.me) : ARG2(ST.me);
- }
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM now matched %"IVdf" times, len=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)), "",
- (IV) ST.count, (IV)ST.alen)
- );
-
- locinput = PL_reginput;
-
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- goto fake_end;
-
- {
- I32 max = (ST.minmod ? ARG1(ST.me) : ARG2(ST.me));
- if ( max == REG_INFTY || ST.count < max )
- goto curlym_do_A; /* try to match another A */
- }
- goto curlym_do_B; /* try to match B */
-
- case CURLYM_A_fail: /* just failed to match an A */
- REGCP_UNWIND(ST.cp);
-
- if (ST.minmod || ST.count < ARG1(ST.me) /* min*/
- || (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags))
- sayNO;
-
- curlym_do_B: /* execute the B in /A{m,n}B/ */
- PL_reginput = locinput;
- if (ST.c1 == CHRTEST_UNINIT) {
- /* calculate c1 and c2 for possible match of 1st char
- * following curly */
- ST.c1 = ST.c2 = CHRTEST_VOID;
- if (HAS_TEXT(ST.B) || JUMPABLE(ST.B)) {
- regnode *text_node = ST.B;
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
- /* this used to be
-
- (HAS_TEXT(text_node) && PL_regkind[OP(text_node)] == EXACT)
-
- But the former is redundant in light of the latter.
-
- if this changes back then the macro for
- IS_TEXT and friends need to change.
- */
- if (PL_regkind[OP(text_node)] == EXACT)
- {
-
- ST.c1 = (U8)*STRING(text_node);
- ST.c2 =
- (IS_TEXTF(text_node))
- ? PL_fold[ST.c1]
- : (IS_TEXTFL(text_node))
- ? PL_fold_locale[ST.c1]
- : ST.c1;
- }
- }
- }
-
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM trying tail with matches=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)),
- "", (IV)ST.count)
- );
- if (ST.c1 != CHRTEST_VOID
- && UCHARAT(PL_reginput) != ST.c1
- && UCHARAT(PL_reginput) != ST.c2)
- {
- /* simulate B failing */
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM Fast bail c1=%"IVdf" c2=%"IVdf"\n",
- (int)(REPORT_CODE_OFF+(depth*2)),"",
- (IV)ST.c1,(IV)ST.c2
- ));
- state_num = CURLYM_B_fail;
- goto reenter_switch;
- }
-
- if (ST.me->flags) {
- /* mark current A as captured */
- I32 paren = ST.me->flags;
- if (ST.count) {
- PL_regoffs[paren].start
- = HOPc(PL_reginput, -ST.alen) - PL_bostr;
- PL_regoffs[paren].end = PL_reginput - PL_bostr;
- /*dmq: *PL_reglastcloseparen = paren; */
- }
- else
- PL_regoffs[paren].end = -1;
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- {
- if (ST.count)
- goto fake_end;
- else
- sayNO;
- }
- }
-
- PUSH_STATE_GOTO(CURLYM_B, ST.B); /* match B */
- /* NOTREACHED */
-
- case CURLYM_B_fail: /* just failed to match a B */
- REGCP_UNWIND(ST.cp);
- if (ST.minmod) {
- I32 max = ARG2(ST.me);
- if (max != REG_INFTY && ST.count == max)
- sayNO;
- goto curlym_do_A; /* try to match a further A */
- }
- /* backtrack one A */
- if (ST.count == ARG1(ST.me) /* min */)
- sayNO;
- ST.count--;
- locinput = HOPc(locinput, -ST.alen);
- goto curlym_do_B; /* try to match B */
-
-#undef ST
-#define ST st->u.curly
-
-#define CURLY_SETPAREN(paren, success) \
- if (paren) { \
- if (success) { \
- PL_regoffs[paren].start = HOPc(locinput, -1) - PL_bostr; \
- PL_regoffs[paren].end = locinput - PL_bostr; \
- *PL_reglastcloseparen = paren; \
- } \
- else \
- PL_regoffs[paren].end = -1; \
- }
-
- case STAR: /* /A*B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 0;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case PLUS: /* /A+B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 1;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case CURLYN: /* /(A){m,n}B/ where A is width 1 */
- ST.paren = scan->flags; /* Which paren to set */
- if (ST.paren > PL_regsize)
- PL_regsize = ST.paren;
- if (ST.paren > *PL_reglastparen)
- *PL_reglastparen = ST.paren;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- ST.min=1;
- ST.max=1;
- }
- scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE);
- goto repeat;
- case CURLY: /* /A{m,n}B/ where A is width 1 */
- ST.paren = 0;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
- repeat:
- /*
- * Lookahead to avoid useless match attempts
- * when we know what character comes next.
- *
- * Used to only do .*x and .*?x, but now it allows
- * for )'s, ('s and (?{ ... })'s to be in the way
- * of the quantifier and the EXACT-like node. -- japhy
- */
-
- if (ST.min > ST.max) /* XXX make this a compile-time check? */
- sayNO;
- if (HAS_TEXT(next) || JUMPABLE(next)) {
- U8 *s;
- regnode *text_node = next;
-
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
-
- if (! HAS_TEXT(text_node))
- ST.c1 = ST.c2 = CHRTEST_VOID;
- else {
- if ( PL_regkind[OP(text_node)] != EXACT ) {
- ST.c1 = ST.c2 = CHRTEST_VOID;
- goto assume_ok_easy;
- }
- else
- s = (U8*)STRING(text_node);
-
- /* Currently we only get here when
-
- PL_rekind[OP(text_node)] == EXACT
-
- if this changes back then the macro for IS_TEXT and
- friends need to change. */
- if (!UTF) {
- ST.c2 = ST.c1 = *s;
- if (IS_TEXTF(text_node))
- ST.c2 = PL_fold[ST.c1];
- else if (IS_TEXTFL(text_node))
- ST.c2 = PL_fold_locale[ST.c1];
- }
- else { /* UTF */
- if (IS_TEXTF(text_node)) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- to_utf8_lower((U8*)s, tmpbuf1, &ulen1);
- to_utf8_upper((U8*)s, tmpbuf2, &ulen2);
-#ifdef EBCDIC
- ST.c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
- ST.c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
-#else
- ST.c1 = utf8n_to_uvuni(tmpbuf1, UTF8_MAXBYTES, 0,
- uniflags);
- ST.c2 = utf8n_to_uvuni(tmpbuf2, UTF8_MAXBYTES, 0,
- uniflags);
-#endif
- }
- else {
- ST.c2 = ST.c1 = utf8n_to_uvchr(s, UTF8_MAXBYTES, 0,
- uniflags);
- }
- }
- }
- }
- else
- ST.c1 = ST.c2 = CHRTEST_VOID;
- assume_ok_easy:
-
- ST.A = scan;
- ST.B = next;
- PL_reginput = locinput;
- if (minmod) {
- minmod = 0;
- if (ST.min && regrepeat(rex, ST.A, ST.min, depth) < ST.min)
- sayNO;
- ST.count = ST.min;
- locinput = PL_reginput;
- REGCP_SET(ST.cp);
- if (ST.c1 == CHRTEST_VOID)
- goto curly_try_B_min;
-
- ST.oldloc = locinput;
-
- /* set ST.maxpos to the furthest point along the
- * string that could possibly match */
- if (ST.max == REG_INFTY) {
- ST.maxpos = PL_regeol - 1;
- if (do_utf8)
- while (UTF8_IS_CONTINUATION(*(U8*)ST.maxpos))
- ST.maxpos--;
- }
- else if (do_utf8) {
- int m = ST.max - ST.min;
- for (ST.maxpos = locinput;
- m >0 && ST.maxpos + UTF8SKIP(ST.maxpos) <= PL_regeol; m--)
- ST.maxpos += UTF8SKIP(ST.maxpos);
- }
- else {
- ST.maxpos = locinput + ST.max - ST.min;
- if (ST.maxpos >= PL_regeol)
- ST.maxpos = PL_regeol - 1;
- }
- goto curly_try_B_min_known;
-
- }
- else {
- ST.count = regrepeat(rex, ST.A, ST.max, depth);
- locinput = PL_reginput;
- if (ST.count < ST.min)
- sayNO;
- if ((ST.count > ST.min)
- && (PL_regkind[OP(ST.B)] == EOL) && (OP(ST.B) != MEOL))
- {
- /* A{m,n} must come at the end of the string, there's
- * no point in backing off ... */
- ST.min = ST.count;
- /* ...except that $ and \Z can match before *and* after
- newline at the end. Consider "\n\n" =~ /\n+\Z\n/.
- We may back off by one in this case. */
- if (UCHARAT(PL_reginput - 1) == '\n' && OP(ST.B) != EOS)
- ST.min--;
- }
- REGCP_SET(ST.cp);
- goto curly_try_B_max;
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_known_fail:
- /* failed to find B in a non-greedy match where c1,c2 valid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- PL_reginput = locinput; /* Could be reset... */
- REGCP_UNWIND(ST.cp);
- /* Couldn't or didn't -- move forward. */
- ST.oldloc = locinput;
- if (do_utf8)
- locinput += UTF8SKIP(locinput);
- else
- locinput++;
- ST.count++;
- curly_try_B_min_known:
- /* find the next place where 'B' could work, then call B */
- {
- int n;
- if (do_utf8) {
- n = (ST.oldloc == locinput) ? 0 : 1;
- if (ST.c1 == ST.c2) {
- STRLEN len;
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos &&
- utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags) != (UV)ST.c1) {
- locinput += len;
- n++;
- }
- }
- else {
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos) {
- STRLEN len;
- const UV c = utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags);
- if (c == (UV)ST.c1 || c == (UV)ST.c2)
- break;
- locinput += len;
- n++;
- }
- }
- }
- else {
- if (ST.c1 == ST.c2) {
- while (locinput <= ST.maxpos &&
- UCHARAT(locinput) != ST.c1)
- locinput++;
- }
- else {
- while (locinput <= ST.maxpos
- && UCHARAT(locinput) != ST.c1
- && UCHARAT(locinput) != ST.c2)
- locinput++;
- }
- n = locinput - ST.oldloc;
- }
- if (locinput > ST.maxpos)
- sayNO;
- /* PL_reginput == oldloc now */
- if (n) {
- ST.count += n;
- if (regrepeat(rex, ST.A, n, depth) < n)
- sayNO;
- }
- PL_reginput = locinput;
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min_known, ST.B);
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_fail:
- /* failed to find B in a non-greedy match where c1,c2 invalid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* failed -- move forward one */
- PL_reginput = locinput;
- if (regrepeat(rex, ST.A, 1, depth)) {
- ST.count++;
- locinput = PL_reginput;
- if (ST.count <= ST.max || (ST.max == REG_INFTY &&
- ST.count > 0)) /* count overflow ? */
- {
- curly_try_B_min:
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min, ST.B);
- }
- }
- sayNO;
- /* NOTREACHED */
-
-
- curly_try_B_max:
- /* a successful greedy match: now try to match B */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- {
- UV c = 0;
- if (ST.c1 != CHRTEST_VOID)
- c = do_utf8 ? utf8n_to_uvchr((U8*)PL_reginput,
- UTF8_MAXBYTES, 0, uniflags)
- : (UV) UCHARAT(PL_reginput);
- /* If it could work, try it. */
- if (ST.c1 == CHRTEST_VOID || c == (UV)ST.c1 || c == (UV)ST.c2) {
- CURLY_SETPAREN(ST.paren, ST.count);
- PUSH_STATE_GOTO(CURLY_B_max, ST.B);
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case CURLY_B_max_fail:
- /* failed to find B in a greedy match */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* back up. */
- if (--ST.count < ST.min)
- sayNO;
- PL_reginput = locinput = HOPc(locinput, -1);
- goto curly_try_B_max;
-
-#undef ST
-
- case END:
- fake_end:
- if (cur_eval) {
- /* we've just finished A in /(??{A})B/; now continue with B */
- I32 tmpix;
- st->u.eval.toggle_reg_flags
- = cur_eval->u.eval.toggle_reg_flags;
- PL_reg_flags ^= st->u.eval.toggle_reg_flags;
-
- st->u.eval.prev_rex = rex_sv; /* inner */
- SETREX(rex_sv,cur_eval->u.eval.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- cur_curlyx = cur_eval->u.eval.prev_curlyx;
- ReREFCNT_inc(rex_sv);
- st->u.eval.cp = regcppush(0); /* Save *all* the positions. */
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- REGCP_SET(st->u.eval.lastcp);
- PL_reginput = locinput;
-
- /* Restore parens of the outer rex without popping the
- * savestack */
- tmpix = PL_savestack_ix;
- PL_savestack_ix = cur_eval->u.eval.lastcp;
- regcppop(rex);
- PL_savestack_ix = tmpix;
-
- st->u.eval.prev_eval = cur_eval;
- cur_eval = cur_eval->u.eval.prev_eval;
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log, "%*s EVAL trying tail ... %"UVxf"\n",
- REPORT_CODE_OFF+depth*2, "",PTR2UV(cur_eval)););
- if ( nochange_depth )
- nochange_depth--;
-
- PUSH_YES_STATE_GOTO(EVAL_AB,
- st->u.eval.prev_eval->u.eval.B); /* match B */
- }
-
- if (locinput < reginfo->till) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n",
- PL_colors[4],
- (long)(locinput - PL_reg_starttry),
- (long)(reginfo->till - PL_reg_starttry),
- PL_colors[5]));
-
- sayNO_SILENT; /* Cannot match: too short. */
- }
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
- case SUCCEED: /* successful SUSPEND/UNLESSM/IFMATCH/CURLYM */
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %ssubpattern success...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]));
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
-#undef ST
-#define ST st->u.ifmatch
-
- case SUSPEND: /* (?>A) */
- ST.wanted = 1;
- PL_reginput = locinput;
- goto do_ifmatch;
-
- case UNLESSM: /* -ve lookaround: (?!A), or with flags, (?<!A) */
- ST.wanted = 0;
- goto ifmatch_trivial_fail_test;
-
- case IFMATCH: /* +ve lookaround: (?=A), or with flags, (?<=A) */
- ST.wanted = 1;
- ifmatch_trivial_fail_test:
- if (scan->flags) {
- char * const s = HOPBACKc(locinput, scan->flags);
- if (!s) {
- /* trivial fail */
- if (logical) {
- logical = 0;
- sw = 1 - (bool)ST.wanted;
- }
- else if (ST.wanted)
- sayNO;
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- }
- PL_reginput = s;
- }
- else
- PL_reginput = locinput;
-
- do_ifmatch:
- ST.me = scan;
- ST.logical = logical;
- logical = 0; /* XXX: reset state of logical once it has been saved into ST */
-
- /* execute body of (?...A) */
- PUSH_YES_STATE_GOTO(IFMATCH_A, NEXTOPER(NEXTOPER(scan)));
- /* NOTREACHED */
-
- case IFMATCH_A_fail: /* body of (?...A) failed */
- ST.wanted = !ST.wanted;
- /* FALL THROUGH */
-
- case IFMATCH_A: /* body of (?...A) succeeded */
- if (ST.logical) {
- sw = (bool)ST.wanted;
- }
- else if (!ST.wanted)
- sayNO;
-
- if (OP(ST.me) == SUSPEND)
- locinput = PL_reginput;
- else {
- locinput = PL_reginput = st->locinput;
- nextchr = UCHARAT(locinput);
- }
- scan = ST.me + ARG(ST.me);
- if (scan == ST.me)
- scan = NULL;
- continue; /* execute B */
-
-#undef ST
-
- case LONGJMP:
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- case COMMIT:
- reginfo->cutpoint = PL_regeol;
- /* FALLTHROUGH */
- case PRUNE:
- PL_reginput = locinput;
- if (!scan->flags)
- sv_yes_mark = sv_commit = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(COMMIT_next,next);
- /* NOTREACHED */
- case COMMIT_next_fail:
- no_final = 1;
- /* FALLTHROUGH */
- case OPFAIL:
- sayNO;
- /* NOTREACHED */
-
-#define ST st->u.mark
- case MARKPOINT:
- ST.prev_mark = mark_state;
- ST.mark_name = sv_commit = sv_yes_mark
- = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- mark_state = st;
- ST.mark_loc = PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(MARKPOINT_next,next);
- /* NOTREACHED */
- case MARKPOINT_next:
- mark_state = ST.prev_mark;
- sayYES;
- /* NOTREACHED */
- case MARKPOINT_next_fail:
- if (popmark && sv_eq(ST.mark_name,popmark))
- {
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- popmark = NULL; /* we found our mark */
- sv_commit = ST.mark_name;
-
- DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,
- "%*s %ssetting cutpoint to mark:%"SVf"...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], SVfARG(sv_commit), PL_colors[5]);
- });
- }
- mark_state = ST.prev_mark;
- sv_yes_mark = mark_state ?
- mark_state->u.mark.mark_name : NULL;
- sayNO;
- /* NOTREACHED */
- case SKIP:
- PL_reginput = locinput;
- if (scan->flags) {
- /* (*SKIP) : if we fail we cut here*/
- ST.mark_name = NULL;
- ST.mark_loc = locinput;
- PUSH_STATE_GOTO(SKIP_next,next);
- } else {
- /* (*SKIP:NAME) : if there is a (*MARK:NAME) fail where it was,
- otherwise do nothing. Meaning we need to scan
- */
- regmatch_state *cur = mark_state;
- SV *find = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
-
- while (cur) {
- if ( sv_eq( cur->u.mark.mark_name,
- find ) )
- {
- ST.mark_name = find;
- PUSH_STATE_GOTO( SKIP_next, next );
- }
- cur = cur->u.mark.prev_mark;
- }
- }
- /* Didn't find our (*MARK:NAME) so ignore this (*SKIP:NAME) */
- break;
- case SKIP_next_fail:
- if (ST.mark_name) {
- /* (*CUT:NAME) - Set up to search for the name as we
- collapse the stack*/
- popmark = ST.mark_name;
- } else {
- /* (*CUT) - No name, we cut here.*/
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- /* but we set sv_commit to latest mark_name if there
- is one so they can test to see how things lead to this
- cut */
- if (mark_state)
- sv_commit=mark_state->u.mark.mark_name;
- }
- no_final = 1;
- sayNO;
- /* NOTREACHED */
-#undef ST
- case FOLDCHAR:
- n = ARG(scan);
- if ( n == (U32)what_len_TRICKYFOLD(locinput,do_utf8,ln) ) {
- locinput += ln;
- } else if ( 0xDF == n && !do_utf8 && !UTF ) {
- sayNO;
- } else {
- U8 folded[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const char * const l = locinput;
- char *e = PL_regeol;
- to_uni_fold(n, folded, &foldlen);
-
- if (ibcmp_utf8((const char*) folded, 0, foldlen, 1,
- l, &e, 0, do_utf8)) {
- sayNO;
- }
- locinput = e;
- }
- nextchr = UCHARAT(locinput);
- break;
- case LNBREAK:
- if ((n=is_LNBREAK(locinput,do_utf8))) {
- locinput += n;
- nextchr = UCHARAT(locinput);
- } else
- sayNO;
- break;
-
-#define CASE_CLASS(nAmE) \
- case nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- locinput += n; \
- nextchr = UCHARAT(locinput); \
- } else \
- sayNO; \
- break; \
- case N##nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- sayNO; \
- } else { \
- locinput += UTF8SKIP(locinput); \
- nextchr = UCHARAT(locinput); \
- } \
- break
-
- CASE_CLASS(VERTWS);
- CASE_CLASS(HORIZWS);
-#undef CASE_CLASS
-
- default:
- PerlIO_printf(Perl_error_log, "%"UVxf" %d\n",
- PTR2UV(scan), OP(scan));
- Perl_croak(aTHX_ "regexp memory corruption");
-
- } /* end switch */
-
- /* switch break jumps here */
- scan = next; /* prepare to execute the next op and ... */
- continue; /* ... jump back to the top, reusing st */
- /* NOTREACHED */
-
- push_yes_state:
- /* push a state that backtracks on success */
- st->u.yes.prev_yes_state = yes_state;
- yes_state = st;
- /* FALL THROUGH */
- push_state:
- /* push a new regex state, then continue at scan */
- {
- regmatch_state *newst;
-
- DEBUG_STACK_r({
- regmatch_state *cur = st;
- regmatch_state *curyes = yes_state;
- int curd = depth;
- regmatch_slab *slab = PL_regmatch_slab;
- for (;curd > -1;cur--,curd--) {
- if (cur < SLAB_FIRST(slab)) {
- slab = slab->prev;
- cur = SLAB_LAST(slab);
- }
- PerlIO_printf(Perl_error_log, "%*s#%-3d %-10s %s\n",
- REPORT_CODE_OFF + 2 + depth * 2,"",
- curd, PL_reg_name[cur->resume_state],
- (curyes == cur) ? "yes" : ""
- );
- if (curyes == cur)
- curyes = cur->u.yes.prev_yes_state;
- }
- } else
- DEBUG_STATE_pp("push")
- );
- depth++;
- st->locinput = locinput;
- newst = st+1;
- if (newst > SLAB_LAST(PL_regmatch_slab))
- newst = S_push_slab(aTHX);
- PL_regmatch_state = newst;
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- st = newst;
- continue;
- /* NOTREACHED */
- }
- }
-
- /*
- * We get here only if there's trouble -- normally "case END" is
- * the terminating point.
- */
- Perl_croak(aTHX_ "corrupted regexp pointers");
- /*NOTREACHED*/
- sayNO;
-
-yes:
- if (yes_state) {
- /* we have successfully completed a subexpression, but we must now
- * pop to the state marked by yes_state and continue from there */
- assert(st != yes_state);
-#ifdef DEBUGGING
- while (st != yes_state) {
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- DEBUG_STATE_r({
- if (no_final) {
- DEBUG_STATE_pp("pop (no final)");
- } else {
- DEBUG_STATE_pp("pop (yes)");
- }
- });
- depth--;
- }
-#else
- while (yes_state < SLAB_FIRST(PL_regmatch_slab)
- || yes_state > SLAB_LAST(PL_regmatch_slab))
- {
- /* not in this slab, pop slab */
- depth -= (st - SLAB_FIRST(PL_regmatch_slab) + 1);
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- depth -= (st - yes_state);
-#endif
- st = yes_state;
- yes_state = st->u.yes.prev_yes_state;
- PL_regmatch_state = st;
-
- if (no_final) {
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
- }
- state_num = st->resume_state + no_final;
- goto reenter_switch;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n",
- PL_colors[4], PL_colors[5]));
-
- if (PL_reg_eval_set) {
- /* each successfully executed (?{...}) block does the equivalent of
- * local $^R = do {...}
- * When popping the save stack, all these locals would be undone;
- * bypass this by setting the outermost saved $^R to the latest
- * value */
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- }
- result = 1;
- goto final_exit;
-
-no:
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], PL_colors[5])
- );
-
-no_silent:
- if (no_final) {
- if (yes_state) {
- goto yes;
- } else {
- goto final_exit;
- }
- }
- if (depth) {
- /* there's a previous state to backtrack to */
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- PL_regmatch_state = st;
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
-
- DEBUG_STATE_pp("pop");
- depth--;
- if (yes_state == st)
- yes_state = st->u.yes.prev_yes_state;
-
- state_num = st->resume_state + 1; /* failure = success + 1 */
- goto reenter_switch;
- }
- result = 0;
-
- final_exit:
- if (rex->intflags & PREGf_VERBARG_SEEN) {
- SV *sv_err = get_sv("REGERROR", 1);
- SV *sv_mrk = get_sv("REGMARK", 1);
- if (result) {
- sv_commit = &PL_sv_no;
- if (!sv_yes_mark)
- sv_yes_mark = &PL_sv_yes;
- } else {
- if (!sv_commit)
- sv_commit = &PL_sv_yes;
- sv_yes_mark = &PL_sv_no;
- }
- sv_setsv(sv_err, sv_commit);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- /* clean up; in particular, free all slabs above current one */
- LEAVE_SCOPE(oldsave);
-
- return result;
-}
-
-/*
- - regrepeat - repeatedly match something simple, report how many
- */
-/*
- * [This routine now assumes that it will only match on things of length 1.
- * That was true before, but now we assume scan - reginput is the count,
- * rather than incrementing count on every character. [Er, except utf8.]]
- */
-STATIC I32
-S_regrepeat(pTHX_ const regexp *prog, const regnode *p, I32 max, int depth)
-{
- dVAR;
- register char *scan;
- register I32 c;
- register char *loceol = PL_regeol;
- register I32 hardcount = 0;
- register bool do_utf8 = PL_reg_match_utf8;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_REGREPEAT;
-
- scan = PL_reginput;
- if (max == REG_INFTY)
- max = I32_MAX;
- else if (max < loceol - scan)
- loceol = scan + max;
- switch (OP(p)) {
- case REG_ANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max && *scan != '\n') {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && *scan != '\n')
- scan++;
- }
- break;
- case SANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- }
- else
- scan = loceol;
- break;
- case CANY:
- scan = loceol;
- break;
- case EXACT: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol && UCHARAT(scan) == c)
- scan++;
- break;
- case EXACTF: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c]))
- scan++;
- break;
- case EXACTFL: /* length of string is 1 */
- PL_reg_flags |= RF_tainted;
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c]))
- scan++;
- break;
- case ANYOF:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- reginclass(prog, p, (U8*)scan, 0, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && REGINCLASS(prog, p, (U8*)scan))
- scan++;
- }
- break;
- case ALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM(*scan))
- scan++;
- }
- break;
- case ALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM_LC(*scan))
- scan++;
- }
- break;
- case NALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM(*scan))
- scan++;
- }
- break;
- case NALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM_LC(*scan))
- scan++;
- }
- break;
- case SPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE(*scan))
- scan++;
- }
- break;
- case SPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE_LC(*scan))
- scan++;
- }
- break;
- case NSPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE(*scan))
- scan++;
- }
- break;
- case NSPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE_LC(*scan))
- scan++;
- }
- break;
- case DIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isDIGIT(*scan))
- scan++;
- }
- break;
- case NDIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isDIGIT(*scan))
- scan++;
- }
- case LNBREAK:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_LNBREAK_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- /*
- LNBREAK can match two latin chars, which is ok,
- because we have a null terminated string, but we
- have to use hardcount in this situation
- */
- while (scan < loceol && (c=is_LNBREAK_latin1(scan))) {
- scan+=c;
- hardcount++;
- }
- }
- break;
- case HORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_HORIZWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_HORIZWS_latin1(scan))
- scan++;
- }
- break;
- case NHORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_HORIZWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_HORIZWS_latin1(scan))
- scan++;
-
- }
- break;
- case VERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_VERTWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
- case NVERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_VERTWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
-
- default: /* Called on something of 0 width. */
- break; /* So match right here or not at all. */
- }
-
- if (hardcount)
- c = hardcount;
- else
- c = scan - PL_reginput;
- PL_reginput = scan;
-
- DEBUG_r({
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, p);
- PerlIO_printf(Perl_debug_log,
- "%*s %s can match %"IVdf" times out of %"IVdf"...\n",
- REPORT_CODE_OFF + depth*2, "", SvPVX_const(prop),(IV)c,(IV)max);
- });
- });
-
- return(c);
-}
-
-
-#if !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION)
-/*
-- regclass_swash - prepare the utf8 swash
-*/
-
-SV *
-Perl_regclass_swash(pTHX_ const regexp *prog, register const regnode* node, bool doinit, SV** listsvp, SV **altsvp)
-{
- dVAR;
- SV *sw = NULL;
- SV *si = NULL;
- SV *alt = NULL;
- RXi_GET_DECL(prog,progi);
- const struct reg_data * const data = prog ? progi->data : NULL;
-
- PERL_ARGS_ASSERT_REGCLASS_SWASH;
-
- if (data && data->count) {
- const U32 n = ARG(node);
-
- if (data->what[n] == 's') {
- SV * const rv = MUTABLE_SV(data->data[n]);
- AV * const av = MUTABLE_AV(SvRV(rv));
- SV **const ary = AvARRAY(av);
- SV **a, **b;
-
- /* See the end of regcomp.c:S_regclass() for
- * documentation of these array elements. */
-
- si = *ary;
- a = SvROK(ary[1]) ? &ary[1] : NULL;
- b = SvTYPE(ary[2]) == SVt_PVAV ? &ary[2] : NULL;
-
- if (a)
- sw = *a;
- else if (si && doinit) {
- sw = swash_init("utf8", "", si, 1, 0);
- (void)av_store(av, 1, sw);
- }
- if (b)
- alt = *b;
- }
- }
-
- if (listsvp)
- *listsvp = si;
- if (altsvp)
- *altsvp = alt;
-
- return sw;
-}
-#endif
-
-/*
- - reginclass - determine if a character falls into a character class
-
- The n is the ANYOF regnode, the p is the target string, lenp
- is pointer to the maximum length of how far to go in the p
- (if the lenp is zero, UTF8SKIP(p) is used),
- do_utf8 tells whether the target string is in UTF-8.
-
- */
-
-STATIC bool
-S_reginclass(pTHX_ const regexp *prog, register const regnode *n, register const U8* p, STRLEN* lenp, register bool do_utf8)
-{
- dVAR;
- const char flags = ANYOF_FLAGS(n);
- bool match = FALSE;
- UV c = *p;
- STRLEN len = 0;
- STRLEN plen;
-
- PERL_ARGS_ASSERT_REGINCLASS;
-
- if (do_utf8 && !UTF8_IS_INVARIANT(c)) {
- c = utf8n_to_uvchr(p, UTF8_MAXBYTES, &len,
- (UTF8_ALLOW_DEFAULT & UTF8_ALLOW_ANYUV)
- | UTF8_ALLOW_FFFF | UTF8_CHECK_ONLY);
- /* see [perl #37836] for UTF8_ALLOW_ANYUV; [perl #38293] for
- * UTF8_ALLOW_FFFF */
- if (len == (STRLEN)-1)
- Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)");
- }
-
- plen = lenp ? *lenp : UNISKIP(NATIVE_TO_UNI(c));
- if (do_utf8 || (flags & ANYOF_UNICODE)) {
- if (lenp)
- *lenp = 0;
- if (do_utf8 && !ANYOF_RUNTIME(n)) {
- if (len != (STRLEN)-1 && c < 256 && ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- }
- if (!match && do_utf8 && (flags & ANYOF_UNICODE_ALL) && c >= 256)
- match = TRUE;
- if (!match) {
- AV *av;
- SV * const sw = regclass_swash(prog, n, TRUE, 0, (SV**)&av);
-
- if (sw) {
- U8 * utf8_p;
- if (do_utf8) {
- utf8_p = (U8 *) p;
- } else {
- STRLEN len = 1;
- utf8_p = bytes_to_utf8(p, &len);
- }
- if (swash_fetch(sw, utf8_p, 1))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- if (!match && lenp && av) {
- I32 i;
- for (i = 0; i <= av_len(av); i++) {
- SV* const sv = *av_fetch(av, i, FALSE);
- STRLEN len;
- const char * const s = SvPV_const(sv, len);
- if (len <= plen && memEQ(s, (char*)utf8_p, len)) {
- *lenp = len;
- match = TRUE;
- break;
- }
- }
- }
- if (!match) {
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1];
-
- STRLEN tmplen;
- to_utf8_fold(utf8_p, tmpbuf, &tmplen);
- if (swash_fetch(sw, tmpbuf, 1))
- match = TRUE;
- }
- }
-
- /* If we allocated a string above, free it */
- if (! do_utf8) Safefree(utf8_p);
- }
- }
- if (match && lenp && *lenp == 0)
- *lenp = UNISKIP(NATIVE_TO_UNI(c));
- }
- if (!match && c < 256) {
- if (ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- U8 f;
-
- if (flags & ANYOF_LOCALE) {
- PL_reg_flags |= RF_tainted;
- f = PL_fold_locale[c];
- }
- else
- f = PL_fold[c];
- if (f != c && ANYOF_BITMAP_TEST(n, f))
- match = TRUE;
- }
-
- if (!match && (flags & ANYOF_CLASS)) {
- PL_reg_flags |= RF_tainted;
- if (
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK(c))
- ) /* How's that for a conditional? */
- {
- match = TRUE;
- }
- }
- }
-
- return (flags & ANYOF_INVERT) ? !match : match;
-}
-
-STATIC U8 *
-S_reghop3(U8 *s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-
-#ifdef XXX_dmq
-/* there are a bunch of places where we use two reghop3's that should
- be replaced with this routine. but since thats not done yet
- we ifdef it out - dmq
-*/
-STATIC U8 *
-S_reghop4(U8 *s, I32 off, const U8* llim, const U8* rlim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP4;
-
- if (off >= 0) {
- while (off-- && s < rlim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > llim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > llim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-#endif
-
-STATIC U8 *
-S_reghopmaybe3(U8* s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOPMAYBE3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- if (off >= 0)
- return NULL;
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- if (off <= 0)
- return NULL;
- }
- return s;
-}
-
-static void
-restore_pos(pTHX_ void *arg)
-{
- dVAR;
- regexp * const rex = (regexp *)arg;
- if (PL_reg_eval_set) {
- if (PL_reg_oldsaved) {
- rex->subbeg = PL_reg_oldsaved;
- rex->sublen = PL_reg_oldsavedlen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- rex->saved_copy = PL_nrs;
-#endif
- RXp_MATCH_COPIED_on(rex);
- }
- PL_reg_magic->mg_len = PL_reg_oldpos;
- PL_reg_eval_set = 0;
- PL_curpm = PL_reg_oldcurpm;
- }
-}
-
-STATIC void
-S_to_utf8_substr(pTHX_ register regexp *prog)
-{
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_UTF8_SUBSTR;
-
- do {
- if (prog->substrs->data[i].substr
- && !prog->substrs->data[i].utf8_substr) {
- SV* const sv = newSVsv(prog->substrs->data[i].substr);
- prog->substrs->data[i].utf8_substr = sv;
- sv_utf8_upgrade(sv);
- if (SvVALID(prog->substrs->data[i].substr)) {
- const U8 flags = BmFLAGS(prog->substrs->data[i].substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- /* Whilst this makes the SV technically "invalid" (as its
- buffer is no longer followed by "\0") when fbm_compile()
- adds the "\n" back, a "\0" is restored. */
- }
- fbm_compile(sv, flags);
- }
- if (prog->substrs->data[i].substr == prog->check_substr)
- prog->check_utf8 = sv;
- }
- } while (i--);
-}
-
-STATIC void
-S_to_byte_substr(pTHX_ register regexp *prog)
-{
- dVAR;
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_BYTE_SUBSTR;
-
- do {
- if (prog->substrs->data[i].utf8_substr
- && !prog->substrs->data[i].substr) {
- SV* sv = newSVsv(prog->substrs->data[i].utf8_substr);
- if (sv_utf8_downgrade(sv, TRUE)) {
- if (SvVALID(prog->substrs->data[i].utf8_substr)) {
- const U8 flags
- = BmFLAGS(prog->substrs->data[i].utf8_substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- }
- fbm_compile(sv, flags);
- }
- } else {
- SvREFCNT_dec(sv);
- sv = &PL_sv_undef;
- }
- prog->substrs->data[i].substr = sv;
- if (prog->substrs->data[i].utf8_substr == prog->check_utf8)
- prog->check_substr = sv;
- }
- } while (i--);
-}
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regcomp.c
- */
-
-/*
- * 'A fair jaw-cracker dwarf-language must be.' --Samwise Gamgee
- *
- * [p.285 of _The Lord of the Rings_, II/iii: "The Ring Goes South"]
- */
-
-/* This file contains functions for compiling a regular expression. See
- * also regexec.c which funnily enough, contains functions for executing
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_comp.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
-
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGCOMP_C
-#include "perl.h"
-
-#ifndef PERL_IN_XSUB_RE
-#include "re_defs.h"
-#endif
-
-#define REG_COMP_C
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#ifdef op
-#undef op
-#endif /* op */
-
-#ifdef MSDOS
-# if defined(BUGGY_MSC6)
- /* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */
-# pragma optimize("a",off)
- /* But MSC 6.00A is happy with 'w', for aliases only across function calls*/
-# pragma optimize("w",on )
-# endif /* BUGGY_MSC6 */
-#endif /* MSDOS */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-typedef struct RExC_state_t {
- U32 flags; /* are we folding, multilining? */
- char *precomp; /* uncompiled string. */
- REGEXP *rx_sv; /* The SV that is the regexp. */
- regexp *rx; /* perl core regexp structure */
- regexp_internal *rxi; /* internal data for regexp object pprivate field */
- char *start; /* Start of input for compile */
- char *end; /* End of input for compile */
- char *parse; /* Input-scan pointer. */
- I32 whilem_seen; /* number of WHILEM in this expr */
- regnode *emit_start; /* Start of emitted-code area */
- regnode *emit_bound; /* First regnode outside of the allocated space */
- regnode *emit; /* Code-emit pointer; ®dummy = don't = compiling */
- I32 naughty; /* How bad is this pattern? */
- I32 sawback; /* Did we see \1, ...? */
- U32 seen;
- I32 size; /* Code size. */
- I32 npar; /* Capture buffer count, (OPEN). */
- I32 cpar; /* Capture buffer count, (CLOSE). */
- I32 nestroot; /* root parens we are in - used by accept */
- I32 extralen;
- I32 seen_zerolen;
- I32 seen_evals;
- regnode **open_parens; /* pointers to open parens */
- regnode **close_parens; /* pointers to close parens */
- regnode *opend; /* END node in program */
- I32 utf8; /* whether the pattern is utf8 or not */
- I32 orig_utf8; /* whether the pattern was originally in utf8 */
- /* XXX use this for future optimisation of case
- * where pattern must be upgraded to utf8. */
- HV *charnames; /* cache of named sequences */
- HV *paren_names; /* Paren names */
-
- regnode **recurse; /* Recurse regops */
- I32 recurse_count; /* Number of recurse regops */
-#if ADD_TO_REGEXEC
- char *starttry; /* -Dr: where regtry was called. */
-#define RExC_starttry (pRExC_state->starttry)
-#endif
-#ifdef DEBUGGING
- const char *lastparse;
- I32 lastnum;
- AV *paren_name_list; /* idx -> name */
-#define RExC_lastparse (pRExC_state->lastparse)
-#define RExC_lastnum (pRExC_state->lastnum)
-#define RExC_paren_name_list (pRExC_state->paren_name_list)
-#endif
-} RExC_state_t;
-
-#define RExC_flags (pRExC_state->flags)
-#define RExC_precomp (pRExC_state->precomp)
-#define RExC_rx_sv (pRExC_state->rx_sv)
-#define RExC_rx (pRExC_state->rx)
-#define RExC_rxi (pRExC_state->rxi)
-#define RExC_start (pRExC_state->start)
-#define RExC_end (pRExC_state->end)
-#define RExC_parse (pRExC_state->parse)
-#define RExC_whilem_seen (pRExC_state->whilem_seen)
-#ifdef RE_TRACK_PATTERN_OFFSETS
-#define RExC_offsets (pRExC_state->rxi->u.offsets) /* I am not like the others */
-#endif
-#define RExC_emit (pRExC_state->emit)
-#define RExC_emit_start (pRExC_state->emit_start)
-#define RExC_emit_bound (pRExC_state->emit_bound)
-#define RExC_naughty (pRExC_state->naughty)
-#define RExC_sawback (pRExC_state->sawback)
-#define RExC_seen (pRExC_state->seen)
-#define RExC_size (pRExC_state->size)
-#define RExC_npar (pRExC_state->npar)
-#define RExC_nestroot (pRExC_state->nestroot)
-#define RExC_extralen (pRExC_state->extralen)
-#define RExC_seen_zerolen (pRExC_state->seen_zerolen)
-#define RExC_seen_evals (pRExC_state->seen_evals)
-#define RExC_utf8 (pRExC_state->utf8)
-#define RExC_orig_utf8 (pRExC_state->orig_utf8)
-#define RExC_charnames (pRExC_state->charnames)
-#define RExC_open_parens (pRExC_state->open_parens)
-#define RExC_close_parens (pRExC_state->close_parens)
-#define RExC_opend (pRExC_state->opend)
-#define RExC_paren_names (pRExC_state->paren_names)
-#define RExC_recurse (pRExC_state->recurse)
-#define RExC_recurse_count (pRExC_state->recurse_count)
-
-
-#define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?')
-#define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \
- ((*s) == '{' && regcurly(s)))
-
-#ifdef SPSTART
-#undef SPSTART /* dratted cpp namespace... */
-#endif
-/*
- * Flags to be passed up and down.
- */
-#define WORST 0 /* Worst case. */
-#define HASWIDTH 0x01 /* Known to match non-null strings. */
-#define SIMPLE 0x02 /* Simple enough to be STAR/PLUS operand. */
-#define SPSTART 0x04 /* Starts with * or +. */
-#define TRYAGAIN 0x08 /* Weeded out a declaration. */
-#define POSTPONED 0x10 /* (?1),(?&name), (??{...}) or similar */
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-RExC_emit_start) : -1)
-
-/* whether trie related optimizations are enabled */
-#if PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION
-#define TRIE_STUDY_OPT
-#define FULL_TRIE_STUDY
-#define TRIE_STCLASS
-#endif
-
-
-
-#define PBYTE(u8str,paren) ((U8*)(u8str))[(paren) >> 3]
-#define PBITVAL(paren) (1 << ((paren) & 7))
-#define PAREN_TEST(u8str,paren) ( PBYTE(u8str,paren) & PBITVAL(paren))
-#define PAREN_SET(u8str,paren) PBYTE(u8str,paren) |= PBITVAL(paren)
-#define PAREN_UNSET(u8str,paren) PBYTE(u8str,paren) &= (~PBITVAL(paren))
-
-
-/* About scan_data_t.
-
- During optimisation we recurse through the regexp program performing
- various inplace (keyhole style) optimisations. In addition study_chunk
- and scan_commit populate this data structure with information about
- what strings MUST appear in the pattern. We look for the longest
- string that must appear for at a fixed location, and we look for the
- longest string that may appear at a floating location. So for instance
- in the pattern:
-
- /FOO[xX]A.*B[xX]BAR/
-
- Both 'FOO' and 'A' are fixed strings. Both 'B' and 'BAR' are floating
- strings (because they follow a .* construct). study_chunk will identify
- both FOO and BAR as being the longest fixed and floating strings respectively.
-
- The strings can be composites, for instance
-
- /(f)(o)(o)/
-
- will result in a composite fixed substring 'foo'.
-
- For each string some basic information is maintained:
-
- - offset or min_offset
- This is the position the string must appear at, or not before.
- It also implicitly (when combined with minlenp) tells us how many
- character must match before the string we are searching.
- Likewise when combined with minlenp and the length of the string
- tells us how many characters must appear after the string we have
- found.
-
- - max_offset
- Only used for floating strings. This is the rightmost point that
- the string can appear at. Ifset to I32 max it indicates that the
- string can occur infinitely far to the right.
-
- - minlenp
- A pointer to the minimum length of the pattern that the string
- was found inside. This is important as in the case of positive
- lookahead or positive lookbehind we can have multiple patterns
- involved. Consider
-
- /(?=FOO).*F/
-
- The minimum length of the pattern overall is 3, the minimum length
- of the lookahead part is 3, but the minimum length of the part that
- will actually match is 1. So 'FOO's minimum length is 3, but the
- minimum length for the F is 1. This is important as the minimum length
- is used to determine offsets in front of and behind the string being
- looked for. Since strings can be composites this is the length of the
- pattern at the time it was commited with a scan_commit. Note that
- the length is calculated by study_chunk, so that the minimum lengths
- are not known until the full pattern has been compiled, thus the
- pointer to the value.
-
- - lookbehind
-
- In the case of lookbehind the string being searched for can be
- offset past the start point of the final matching string.
- If this value was just blithely removed from the min_offset it would
- invalidate some of the calculations for how many chars must match
- before or after (as they are derived from min_offset and minlen and
- the length of the string being searched for).
- When the final pattern is compiled and the data is moved from the
- scan_data_t structure into the regexp structure the information
- about lookbehind is factored in, with the information that would
- have been lost precalculated in the end_shift field for the
- associated string.
-
- The fields pos_min and pos_delta are used to store the minimum offset
- and the delta to the maximum offset at the current point in the pattern.
-
-*/
-
-typedef struct scan_data_t {
- /*I32 len_min; unused */
- /*I32 len_delta; unused */
- I32 pos_min;
- I32 pos_delta;
- SV *last_found;
- I32 last_end; /* min value, <0 unless valid. */
- I32 last_start_min;
- I32 last_start_max;
- SV **longest; /* Either &l_fixed, or &l_float. */
- SV *longest_fixed; /* longest fixed string found in pattern */
- I32 offset_fixed; /* offset where it starts */
- I32 *minlen_fixed; /* pointer to the minlen relevent to the string */
- I32 lookbehind_fixed; /* is the position of the string modfied by LB */
- SV *longest_float; /* longest floating string found in pattern */
- I32 offset_float_min; /* earliest point in string it can appear */
- I32 offset_float_max; /* latest point in string it can appear */
- I32 *minlen_float; /* pointer to the minlen relevent to the string */
- I32 lookbehind_float; /* is the position of the string modified by LB */
- I32 flags;
- I32 whilem_c;
- I32 *last_closep;
- struct regnode_charclass_class *start_class;
-} scan_data_t;
-
-/*
- * Forward declarations for pregcomp()'s friends.
- */
-
-static const scan_data_t zero_scan_data =
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0};
-
-#define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL)
-#define SF_BEFORE_SEOL 0x0001
-#define SF_BEFORE_MEOL 0x0002
-#define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL)
-#define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL)
-
-#ifdef NO_UNARY_PLUS
-# define SF_FIX_SHIFT_EOL (0+2)
-# define SF_FL_SHIFT_EOL (0+4)
-#else
-# define SF_FIX_SHIFT_EOL (+2)
-# define SF_FL_SHIFT_EOL (+4)
-#endif
-
-#define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL)
-#define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL)
-
-#define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL)
-#define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */
-#define SF_IS_INF 0x0040
-#define SF_HAS_PAR 0x0080
-#define SF_IN_PAR 0x0100
-#define SF_HAS_EVAL 0x0200
-#define SCF_DO_SUBSTR 0x0400
-#define SCF_DO_STCLASS_AND 0x0800
-#define SCF_DO_STCLASS_OR 0x1000
-#define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR)
-#define SCF_WHILEM_VISITED_POS 0x2000
-
-#define SCF_TRIE_RESTUDY 0x4000 /* Do restudy? */
-#define SCF_SEEN_ACCEPT 0x8000
-
-#define UTF (RExC_utf8 != 0)
-#define LOC ((RExC_flags & RXf_PMf_LOCALE) != 0)
-#define FOLD ((RExC_flags & RXf_PMf_FOLD) != 0)
-
-#define OOB_UNICODE 12345678
-#define OOB_NAMEDCLASS -1
-
-#define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b)
-
-
-/* length of regex to show in messages that don't mark a position within */
-#define RegexLengthToShowInErrorMessages 127
-
-/*
- * If MARKER[12] are adjusted, be sure to adjust the constants at the top
- * of t/op/regmesg.t, the tests in t/op/re_tests, and those in
- * op/pragma/warn/regcomp.
- */
-#define MARKER1 "<-- HERE" /* marker as it appears in the description */
-#define MARKER2 " <-- HERE " /* marker as it appears within the regex */
-
-#define REPORT_LOCATION " in regex; marked by " MARKER1 " in m/%.*s" MARKER2 "%s/"
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given
- * arg. Show regex, up to a maximum length. If it's too long, chop and add
- * "...".
- */
-#define _FAIL(code) STMT_START { \
- const char *ellipses = ""; \
- IV len = RExC_end - RExC_precomp; \
- \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- if (len > RegexLengthToShowInErrorMessages) { \
- /* chop 10 shorter than the max, to ensure meaning of "..." */ \
- len = RegexLengthToShowInErrorMessages - 10; \
- ellipses = "..."; \
- } \
- code; \
-} STMT_END
-
-#define FAIL(msg) _FAIL( \
- Perl_croak(aTHX_ "%s in regex m/%.*s%s/", \
- msg, (int)len, RExC_precomp, ellipses))
-
-#define FAIL2(msg,arg) _FAIL( \
- Perl_croak(aTHX_ msg " in regex m/%.*s%s/", \
- arg, (int)len, RExC_precomp, ellipses))
-
-/*
- * Simple_vFAIL -- like FAIL, but marks the current location in the scan
- */
-#define Simple_vFAIL(m) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- Perl_croak(aTHX_ "%s" REPORT_LOCATION, \
- m, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL()
- */
-#define vFAIL(m) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL(m); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts two arguments.
- */
-#define Simple_vFAIL2(m,a1) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2().
- */
-#define vFAIL2(m,a1) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL2(m, a1); \
-} STMT_END
-
-
-/*
- * Like Simple_vFAIL(), but accepts three arguments.
- */
-#define Simple_vFAIL3(m, a1, a2) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3().
- */
-#define vFAIL3(m,a1,a2) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL3(m, a1, a2); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts four arguments.
- */
-#define Simple_vFAIL4(m, a1, a2, a3) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNreg(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNregdep(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_REGEXP), \
- m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN2reg(loc, m, a1) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN3(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN3reg(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN4(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN4reg(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN5(loc, m, a1, a2, a3, a4) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, a4, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-
-/* Allow for side effects in s */
-#define REGC(c,s) STMT_START { \
- if (!SIZE_ONLY) *(s) = (c); else (void)(s); \
-} STMT_END
-
-/* Macros for recording node offsets. 20001227 mjd@plover.com
- * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in
- * element 2*n-1 of the array. Element #2n holds the byte length node #n.
- * Element 0 holds the number n.
- * Position is 1 indexed.
- */
-#ifndef RE_TRACK_PATTERN_OFFSETS
-#define Set_Node_Offset_To_R(node,byte)
-#define Set_Node_Offset(node,byte)
-#define Set_Cur_Node_Offset
-#define Set_Node_Length_To_R(node,len)
-#define Set_Node_Length(node,len)
-#define Set_Node_Cur_Length(node)
-#define Node_Offset(n)
-#define Node_Length(n)
-#define Set_Node_Offset_Length(node,offset,len)
-#define ProgLen(ri) ri->u.proglen
-#define SetProgLen(ri,x) ri->u.proglen = x
-#else
-#define ProgLen(ri) ri->u.offsets[0]
-#define SetProgLen(ri,x) ri->u.offsets[0] = x
-#define Set_Node_Offset_To_R(node,byte) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) offset of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(byte))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Offset macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)-1] = (byte); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Offset(node,byte) \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start)
-#define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse)
-
-#define Set_Node_Length_To_R(node,len) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) size of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(len))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Length macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)] = (len); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Length(node,len) \
- Set_Node_Length_To_R((node)-RExC_emit_start, len)
-#define Set_Cur_Node_Length(len) Set_Node_Length(RExC_emit, len)
-#define Set_Node_Cur_Length(node) \
- Set_Node_Length(node, RExC_parse - parse_start)
-
-/* Get offsets and lengths */
-#define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1])
-#define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)])
-
-#define Set_Node_Offset_Length(node,offset,len) STMT_START { \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (offset)); \
- Set_Node_Length_To_R((node)-RExC_emit_start, (len)); \
-} STMT_END
-#endif
-
-#if PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS
-#define EXPERIMENTAL_INPLACESCAN
-#endif /*RE_TRACK_PATTERN_OFFSETS*/
-
-#define DEBUG_STUDYDATA(str,data,depth) \
-DEBUG_OPTIMISE_MORE_r(if(data){ \
- PerlIO_printf(Perl_debug_log, \
- "%*s" str "Pos:%"IVdf"/%"IVdf \
- " Flags: 0x%"UVXf" Whilem_c: %"IVdf" Lcp: %"IVdf" %s", \
- (int)(depth)*2, "", \
- (IV)((data)->pos_min), \
- (IV)((data)->pos_delta), \
- (UV)((data)->flags), \
- (IV)((data)->whilem_c), \
- (IV)((data)->last_closep ? *((data)->last_closep) : -1), \
- is_inf ? "INF " : "" \
- ); \
- if ((data)->last_found) \
- PerlIO_printf(Perl_debug_log, \
- "Last:'%s' %"IVdf":%"IVdf"/%"IVdf" %sFixed:'%s' @ %"IVdf \
- " %sFloat: '%s' @ %"IVdf"/%"IVdf"", \
- SvPVX_const((data)->last_found), \
- (IV)((data)->last_end), \
- (IV)((data)->last_start_min), \
- (IV)((data)->last_start_max), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_fixed)) ? "*" : "", \
- SvPVX_const((data)->longest_fixed), \
- (IV)((data)->offset_fixed), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_float)) ? "*" : "", \
- SvPVX_const((data)->longest_float), \
- (IV)((data)->offset_float_min), \
- (IV)((data)->offset_float_max) \
- ); \
- PerlIO_printf(Perl_debug_log,"\n"); \
-});
-
-static void clear_re(pTHX_ void *r);
-
-/* Mark that we cannot extend a found fixed substring at this point.
- Update the longest found anchored substring and the longest found
- floating substrings if needed. */
-
-STATIC void
-S_scan_commit(pTHX_ const RExC_state_t *pRExC_state, scan_data_t *data, I32 *minlenp, int is_inf)
-{
- const STRLEN l = CHR_SVLEN(data->last_found);
- const STRLEN old_l = CHR_SVLEN(*data->longest);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_SCAN_COMMIT;
-
- if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) {
- SvSetMagicSV(*data->longest, data->last_found);
- if (*data->longest == data->longest_fixed) {
- data->offset_fixed = l ? data->last_start_min : data->pos_min;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL);
- else
- data->flags &= ~SF_FIX_BEFORE_EOL;
- data->minlen_fixed=minlenp;
- data->lookbehind_fixed=0;
- }
- else { /* *data->longest == data->longest_float */
- data->offset_float_min = l ? data->last_start_min : data->pos_min;
- data->offset_float_max = (l
- ? data->last_start_max
- : data->pos_min + data->pos_delta);
- if (is_inf || (U32)data->offset_float_max > (U32)I32_MAX)
- data->offset_float_max = I32_MAX;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL);
- else
- data->flags &= ~SF_FL_BEFORE_EOL;
- data->minlen_float=minlenp;
- data->lookbehind_float=0;
- }
- }
- SvCUR_set(data->last_found, 0);
- {
- SV * const sv = data->last_found;
- if (SvUTF8(sv) && SvMAGICAL(sv)) {
- MAGIC * const mg = mg_find(sv, PERL_MAGIC_utf8);
- if (mg)
- mg->mg_len = 0;
- }
- }
- data->last_end = -1;
- data->flags &= ~SF_BEFORE_EOL;
- DEBUG_STUDYDATA("commit: ",data,0);
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_anything(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_ANYTHING;
-
- ANYOF_CLASS_ZERO(cl);
- ANYOF_BITMAP_SETALL(cl);
- cl->flags = ANYOF_EOS|ANYOF_UNICODE_ALL;
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* Can match anything (initialization) */
-STATIC int
-S_cl_is_anything(const struct regnode_charclass_class *cl)
-{
- int value;
-
- PERL_ARGS_ASSERT_CL_IS_ANYTHING;
-
- for (value = 0; value <= ANYOF_MAX; value += 2)
- if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1))
- return 1;
- if (!(cl->flags & ANYOF_UNICODE_ALL))
- return 0;
- if (!ANYOF_BITMAP_TESTALLSET((const void*)cl))
- return 0;
- return 1;
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_init(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
-}
-
-STATIC void
-S_cl_init_zero(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT_ZERO;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* 'And' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_and(struct regnode_charclass_class *cl,
- const struct regnode_charclass_class *and_with)
-{
- PERL_ARGS_ASSERT_CL_AND;
-
- assert(and_with->type == ANYOF);
- if (!(and_with->flags & ANYOF_CLASS)
- && !(cl->flags & ANYOF_CLASS)
- && (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(and_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD)) {
- int i;
-
- if (and_with->flags & ANYOF_INVERT)
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= ~and_with->bitmap[i];
- else
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= and_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise, leave it along for a moment. */
- if (!(and_with->flags & ANYOF_EOS))
- cl->flags &= ~ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE_ALL && and_with->flags & ANYOF_UNICODE &&
- !(and_with->flags & ANYOF_INVERT)) {
- cl->flags &= ~ANYOF_UNICODE_ALL;
- cl->flags |= ANYOF_UNICODE;
- ARG_SET(cl, ARG(and_with));
- }
- if (!(and_with->flags & ANYOF_UNICODE_ALL) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE_ALL;
- if (!(and_with->flags & (ANYOF_UNICODE|ANYOF_UNICODE_ALL)) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE;
-}
-
-/* 'OR' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_or(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl, const struct regnode_charclass_class *or_with)
-{
- PERL_ARGS_ASSERT_CL_OR;
-
- if (or_with->flags & ANYOF_INVERT) {
- /* We do not use
- * (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2))
- * <= (B1 | !B2) | (CL1 | !CL2)
- * which is wasteful if CL2 is small, but we ignore CL2:
- * (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1
- * XXXX Can we handle case-fold? Unclear:
- * (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) =
- * (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i'))
- */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(or_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD) ) {
- int i;
-
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= ~or_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise */
- else {
- cl_anything(pRExC_state, cl);
- }
- } else {
- /* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && (!(or_with->flags & ANYOF_FOLD)
- || (cl->flags & ANYOF_FOLD)) ) {
- int i;
-
- /* OR char bitmap and class bitmap separately */
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= or_with->bitmap[i];
- if (or_with->flags & ANYOF_CLASS) {
- for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++)
- cl->classflags[i] |= or_with->classflags[i];
- cl->flags |= ANYOF_CLASS;
- }
- }
- else { /* XXXX: logic is complicated, leave it along for a moment. */
- cl_anything(pRExC_state, cl);
- }
- }
- if (or_with->flags & ANYOF_EOS)
- cl->flags |= ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE && or_with->flags & ANYOF_UNICODE &&
- ARG(cl) != ARG(or_with)) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
- if (or_with->flags & ANYOF_UNICODE_ALL) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
-}
-
-#define TRIE_LIST_ITEM(state,idx) (trie->states[state].trans.list)[ idx ]
-#define TRIE_LIST_CUR(state) ( TRIE_LIST_ITEM( state, 0 ).forid )
-#define TRIE_LIST_LEN(state) ( TRIE_LIST_ITEM( state, 0 ).newstate )
-#define TRIE_LIST_USED(idx) ( trie->states[state].trans.list ? (TRIE_LIST_CUR( idx ) - 1) : 0 )
-
-
-#ifdef DEBUGGING
-/*
- dump_trie(trie,widecharmap,revcharmap)
- dump_trie_interim_list(trie,widecharmap,revcharmap,next_alloc)
- dump_trie_interim_table(trie,widecharmap,revcharmap,next_alloc)
-
- These routines dump out a trie in a somewhat readable format.
- The _interim_ variants are used for debugging the interim
- tables that are used to generate the final compressed
- representation which is what dump_trie expects.
-
- Part of the reason for their existance is to provide a form
- of documentation as to how the different representations function.
-
-*/
-
-/*
- Dumps the final compressed table form of the trie to Perl_debug_log.
- Used for debugging make_trie().
-*/
-
-STATIC void
-S_dump_trie(pTHX_ const struct _reg_trie_data *trie, HV *widecharmap,
- AV *revcharmap, U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE;
-
- PerlIO_printf( Perl_debug_log, "%*sChar : %-6s%-6s%-4s ",
- (int)depth * 2 + 2,"",
- "Match","Base","Ofs" );
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ ) {
- SV ** const tmp = av_fetch( revcharmap, state, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
- PerlIO_printf( Perl_debug_log, "\n%*sState|-----------------------",
- (int)depth * 2 + 2,"");
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ )
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth, "--------");
- PerlIO_printf( Perl_debug_log, "\n");
-
- for( state = 1 ; state < trie->statecount ; state++ ) {
- const U32 base = trie->states[ state ].trans.base;
-
- PerlIO_printf( Perl_debug_log, "%*s#%4"UVXf"|", (int)depth * 2 + 2,"", (UV)state);
-
- if ( trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " W%4X", trie->states[ state ].wordnum );
- } else {
- PerlIO_printf( Perl_debug_log, "%6s", "" );
- }
-
- PerlIO_printf( Perl_debug_log, " @%4"UVXf" ", (UV)base );
-
- if ( base ) {
- U32 ofs = 0;
-
- while( ( base + ofs < trie->uniquecharcount ) ||
- ( base + ofs - trie->uniquecharcount < trie->lasttrans
- && trie->trans[ base + ofs - trie->uniquecharcount ].check != state))
- ofs++;
-
- PerlIO_printf( Perl_debug_log, "+%2"UVXf"[ ", (UV)ofs);
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- PerlIO_printf( Perl_debug_log, "%*"UVXf,
- colwidth,
- (UV)trie->trans[ base + ofs - trie->uniquecharcount ].next );
- } else {
- PerlIO_printf( Perl_debug_log, "%*s",colwidth," ." );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "]");
-
- }
- PerlIO_printf( Perl_debug_log, "\n" );
- }
-}
-/*
- Dumps a fully constructed but uncompressed trie in list form.
- List tries normally only are used for construction when the number of
- possible chars (trie->uniquecharcount) is very high.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_list(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_LIST;
-
- /* print out the table precompression. */
- PerlIO_printf( Perl_debug_log, "%*sState :Word | Transition Data\n%*s%s",
- (int)depth * 2 + 2,"", (int)depth * 2 + 2,"",
- "------:-----+-----------------\n" );
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U16 charid;
-
- PerlIO_printf( Perl_debug_log, "%*s %4"UVXf" :",
- (int)depth * 2 + 2,"", (UV)state );
- if ( ! trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, "%5s| ","");
- } else {
- PerlIO_printf( Perl_debug_log, "W%4x| ",
- trie->states[ state ].wordnum
- );
- }
- for( charid = 1 ; charid <= TRIE_LIST_USED( state ) ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, TRIE_LIST_ITEM(state,charid).forid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s:%3X=%4"UVXf" | ",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- ) ,
- TRIE_LIST_ITEM(state,charid).forid,
- (UV)TRIE_LIST_ITEM(state,charid).newstate
- );
- if (!(charid % 10))
- PerlIO_printf(Perl_debug_log, "\n%*s| ",
- (int)((depth * 2) + 14), "");
- }
- }
- PerlIO_printf( Perl_debug_log, "\n");
- }
-}
-
-/*
- Dumps a fully constructed but uncompressed trie in table form.
- This is the normal DFA style state transition table, with a few
- twists to facilitate compression later.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_table(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- U16 charid;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_TABLE;
-
- /*
- print out the table precompression so that we can do a visual check
- that they are identical.
- */
-
- PerlIO_printf( Perl_debug_log, "%*sChar : ",(int)depth * 2 + 2,"" );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, charid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "\n%*sState+-",(int)depth * 2 + 2,"" );
-
- for( charid=0 ; charid < trie->uniquecharcount ; charid++ ) {
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth,"--------");
- }
-
- PerlIO_printf( Perl_debug_log, "\n" );
-
- for( state=1 ; state < next_alloc ; state += trie->uniquecharcount ) {
-
- PerlIO_printf( Perl_debug_log, "%*s%4"UVXf" : ",
- (int)depth * 2 + 2,"",
- (UV)TRIE_NODENUM( state ) );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- UV v=(UV)SAFE_TRIE_NODENUM( trie->trans[ state + charid ].next );
- if (v)
- PerlIO_printf( Perl_debug_log, "%*"UVXf, colwidth, v );
- else
- PerlIO_printf( Perl_debug_log, "%*s", colwidth, "." );
- }
- if ( ! trie->states[ TRIE_NODENUM( state ) ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf")\n", (UV)trie->trans[ state ].check );
- } else {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf") W%4X\n", (UV)trie->trans[ state ].check,
- trie->states[ TRIE_NODENUM( state ) ].wordnum );
- }
- }
-}
-
-#endif
-
-/* make_trie(startbranch,first,last,tail,word_count,flags,depth)
- startbranch: the first branch in the whole branch sequence
- first : start branch of sequence of branch-exact nodes.
- May be the same as startbranch
- last : Thing following the last branch.
- May be the same as tail.
- tail : item following the branch sequence
- count : words in the sequence
- flags : currently the OP() type we will be building one of /EXACT(|F|Fl)/
- depth : indent depth
-
-Inplace optimizes a sequence of 2 or more Branch-Exact nodes into a TRIE node.
-
-A trie is an N'ary tree where the branches are determined by digital
-decomposition of the key. IE, at the root node you look up the 1st character and
-follow that branch repeat until you find the end of the branches. Nodes can be
-marked as "accepting" meaning they represent a complete word. Eg:
-
- /he|she|his|hers/
-
-would convert into the following structure. Numbers represent states, letters
-following numbers represent valid transitions on the letter from that state, if
-the number is in square brackets it represents an accepting state, otherwise it
-will be in parenthesis.
-
- +-h->+-e->[3]-+-r->(8)-+-s->[9]
- | |
- | (2)
- | |
- (1) +-i->(6)-+-s->[7]
- |
- +-s->(3)-+-h->(4)-+-e->[5]
-
- Accept Word Mapping: 3=>1 (he),5=>2 (she), 7=>3 (his), 9=>4 (hers)
-
-This shows that when matching against the string 'hers' we will begin at state 1
-read 'h' and move to state 2, read 'e' and move to state 3 which is accepting,
-then read 'r' and go to state 8 followed by 's' which takes us to state 9 which
-is also accepting. Thus we know that we can match both 'he' and 'hers' with a
-single traverse. We store a mapping from accepting to state to which word was
-matched, and then when we have multiple possibilities we try to complete the
-rest of the regex in the order in which they occured in the alternation.
-
-The only prior NFA like behaviour that would be changed by the TRIE support is
-the silent ignoring of duplicate alternations which are of the form:
-
- / (DUPE|DUPE) X? (?{ ... }) Y /x
-
-Thus EVAL blocks follwing a trie may be called a different number of times with
-and without the optimisation. With the optimisations dupes will be silently
-ignored. This inconsistant behaviour of EVAL type nodes is well established as
-the following demonstrates:
-
- 'words'=~/(word|word|word)(?{ print $1 })[xyz]/
-
-which prints out 'word' three times, but
-
- 'words'=~/(word|word|word)(?{ print $1 })S/
-
-which doesnt print it out at all. This is due to other optimisations kicking in.
-
-Example of what happens on a structural level:
-
-The regexp /(ac|ad|ab)+/ will produce the folowing debug output:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: BRANCH(8)
- 6: EXACT <ac>(16)
- 8: BRANCH(11)
- 9: EXACT <ad>(16)
- 11: BRANCH(14)
- 12: EXACT <ab>(16)
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-This would be optimizable with startbranch=5, first=5, last=16, tail=16
-and should turn into:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: TRIE(16)
- [Words:3 Chars Stored:6 Unique Chars:4 States:5 NCP:1]
- <ac>
- <ad>
- <ab>
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-Cases where tail != last would be like /(?foo|bar)baz/:
-
- 1: BRANCH(4)
- 2: EXACT <foo>(8)
- 4: BRANCH(7)
- 5: EXACT <bar>(8)
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
-which would be optimizable with startbranch=1, first=1, last=7, tail=8
-and would end up looking like:
-
- 1: TRIE(8)
- [Words:2 Chars Stored:6 Unique Chars:5 States:7 NCP:1]
- <foo>
- <bar>
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
- d = uvuni_to_utf8_flags(d, uv, 0);
-
-is the recommended Unicode-aware way of saying
-
- *(d++) = uv;
-*/
-
-#define TRIE_STORE_REVCHAR \
- STMT_START { \
- if (UTF) { \
- SV *zlopp = newSV(2); \
- unsigned char *flrbbbbb = (unsigned char *) SvPVX(zlopp); \
- unsigned const char *const kapow = uvuni_to_utf8(flrbbbbb, uvc & 0xFF); \
- SvCUR_set(zlopp, kapow - flrbbbbb); \
- SvPOK_on(zlopp); \
- SvUTF8_on(zlopp); \
- av_push(revcharmap, zlopp); \
- } else { \
- char ooooff = (char)uvc; \
- av_push(revcharmap, newSVpvn(&ooooff, 1)); \
- } \
- } STMT_END
-
-#define TRIE_READ_CHAR STMT_START { \
- wordlen++; \
- if ( UTF ) { \
- if ( folder ) { \
- if ( foldlen > 0 ) { \
- uvc = utf8n_to_uvuni( scan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- scan += len; \
- len = 0; \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- scan = foldbuf + UNISKIP( uvc ); \
- } \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- } \
- } else { \
- uvc = (U32)*uc; \
- len = 1; \
- } \
-} STMT_END
-
-
-
-#define TRIE_LIST_PUSH(state,fid,ns) STMT_START { \
- if ( TRIE_LIST_CUR( state ) >=TRIE_LIST_LEN( state ) ) { \
- U32 ging = TRIE_LIST_LEN( state ) *= 2; \
- Renew( trie->states[ state ].trans.list, ging, reg_trie_trans_le ); \
- } \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).forid = fid; \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).newstate = ns; \
- TRIE_LIST_CUR( state )++; \
-} STMT_END
-
-#define TRIE_LIST_NEW(state) STMT_START { \
- Newxz( trie->states[ state ].trans.list, \
- 4, reg_trie_trans_le ); \
- TRIE_LIST_CUR( state ) = 1; \
- TRIE_LIST_LEN( state ) = 4; \
-} STMT_END
-
-#define TRIE_HANDLE_WORD(state) STMT_START { \
- U16 dupe= trie->states[ state ].wordnum; \
- regnode * const noper_next = regnext( noper ); \
- \
- if (trie->wordlen) \
- trie->wordlen[ curword ] = wordlen; \
- DEBUG_r({ \
- /* store the word for dumping */ \
- SV* tmp; \
- if (OP(noper) != NOTHING) \
- tmp = newSVpvn_utf8(STRING(noper), STR_LEN(noper), UTF); \
- else \
- tmp = newSVpvn_utf8( "", 0, UTF ); \
- av_push( trie_words, tmp ); \
- }); \
- \
- curword++; \
- \
- if ( noper_next < tail ) { \
- if (!trie->jump) \
- trie->jump = (U16 *) PerlMemShared_calloc( word_count + 1, sizeof(U16) ); \
- trie->jump[curword] = (U16)(noper_next - convert); \
- if (!jumper) \
- jumper = noper_next; \
- if (!nextbranch) \
- nextbranch= regnext(cur); \
- } \
- \
- if ( dupe ) { \
- /* So it's a dupe. This means we need to maintain a */\
- /* linked-list from the first to the next. */\
- /* we only allocate the nextword buffer when there */\
- /* a dupe, so first time we have to do the allocation */\
- if (!trie->nextword) \
- trie->nextword = (U16 *) \
- PerlMemShared_calloc( word_count + 1, sizeof(U16)); \
- while ( trie->nextword[dupe] ) \
- dupe= trie->nextword[dupe]; \
- trie->nextword[dupe]= curword; \
- } else { \
- /* we haven't inserted this word yet. */ \
- trie->states[ state ].wordnum = curword; \
- } \
-} STMT_END
-
-
-#define TRIE_TRANS_STATE(state,base,ucharcount,charid,special) \
- ( ( base + charid >= ucharcount \
- && base + charid < ubound \
- && state == trie->trans[ base - ucharcount + charid ].check \
- && trie->trans[ base - ucharcount + charid ].next ) \
- ? trie->trans[ base - ucharcount + charid ].next \
- : ( state==1 ? special : 0 ) \
- )
-
-#define MADE_TRIE 1
-#define MADE_JUMP_TRIE 2
-#define MADE_EXACT_TRIE 4
-
-STATIC I32
-S_make_trie(pTHX_ RExC_state_t *pRExC_state, regnode *startbranch, regnode *first, regnode *last, regnode *tail, U32 word_count, U32 flags, U32 depth)
-{
- dVAR;
- /* first pass, loop through and scan words */
- reg_trie_data *trie;
- HV *widecharmap = NULL;
- AV *revcharmap = newAV();
- regnode *cur;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- STRLEN len = 0;
- UV uvc = 0;
- U16 curword = 0;
- U32 next_alloc = 0;
- regnode *jumper = NULL;
- regnode *nextbranch = NULL;
- regnode *convert = NULL;
- /* we just use folder as a flag in utf8 */
- const U8 * const folder = ( flags == EXACTF
- ? PL_fold
- : ( flags == EXACTFL
- ? PL_fold_locale
- : NULL
- )
- );
-
-#ifdef DEBUGGING
- const U32 data_slot = add_data( pRExC_state, 4, "tuuu" );
- AV *trie_words = NULL;
- /* along with revcharmap, this only used during construction but both are
- * useful during debugging so we store them in the struct when debugging.
- */
-#else
- const U32 data_slot = add_data( pRExC_state, 2, "tu" );
- STRLEN trie_charcount=0;
-#endif
- SV *re_trie_maxbuff;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- trie = (reg_trie_data *) PerlMemShared_calloc( 1, sizeof(reg_trie_data) );
- trie->refcount = 1;
- trie->startstate = 1;
- trie->wordcount = word_count;
- RExC_rxi->data->data[ data_slot ] = (void*)trie;
- trie->charmap = (U16 *) PerlMemShared_calloc( 256, sizeof(U16) );
- if (!(UTF && folder))
- trie->bitmap = (char *) PerlMemShared_calloc( ANYOF_BITMAP_SIZE, 1 );
- DEBUG_r({
- trie_words = newAV();
- });
-
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff)) {
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- DEBUG_OPTIMISE_r({
- PerlIO_printf( Perl_debug_log,
- "%*smake_trie start==%d, first==%d, last==%d, tail==%d depth=%d\n",
- (int)depth * 2 + 2, "",
- REG_NODE_NUM(startbranch),REG_NODE_NUM(first),
- REG_NODE_NUM(last), REG_NODE_NUM(tail),
- (int)depth);
- });
-
- /* Find the node we are going to overwrite */
- if ( first == startbranch && OP( last ) != BRANCH ) {
- /* whole branch chain */
- convert = first;
- } else {
- /* branch sub-chain */
- convert = NEXTOPER( first );
- }
-
- /* -- First loop and Setup --
-
- We first traverse the branches and scan each word to determine if it
- contains widechars, and how many unique chars there are, this is
- important as we have to build a table with at least as many columns as we
- have unique chars.
-
- We use an array of integers to represent the character codes 0..255
- (trie->charmap) and we use a an HV* to store Unicode characters. We use the
- native representation of the character value as the key and IV's for the
- coded index.
-
- *TODO* If we keep track of how many times each character is used we can
- remap the columns so that the table compression later on is more
- efficient in terms of memory by ensuring most common value is in the
- middle and the least common are on the outside. IMO this would be better
- than a most to least common mapping as theres a decent chance the most
- common letter will share a node with the least common, meaning the node
- will not be compressable. With a middle is most common approach the worst
- case is when we have the least common nodes twice.
-
- */
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- STRLEN foldlen = 0;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- const U8 *scan = (U8*)NULL;
- U32 wordlen = 0; /* required init */
- STRLEN chars = 0;
- bool set_bit = trie->bitmap ? 1 : 0; /*store the first char in the bitmap?*/
-
- if (OP(noper) == NOTHING) {
- trie->minlen= 0;
- continue;
- }
- if ( set_bit ) /* bitmap only alloced when !(UTF&&Folding) */
- TRIE_BITMAP_SET(trie,*uc); /* store the raw first byte
- regardless of encoding */
-
- for ( ; uc < e ; uc += len ) {
- TRIE_CHARCOUNT(trie)++;
- TRIE_READ_CHAR;
- chars++;
- if ( uvc < 256 ) {
- if ( !trie->charmap[ uvc ] ) {
- trie->charmap[ uvc ]=( ++trie->uniquecharcount );
- if ( folder )
- trie->charmap[ folder[ uvc ] ] = trie->charmap[ uvc ];
- TRIE_STORE_REVCHAR;
- }
- if ( set_bit ) {
- /* store the codepoint in the bitmap, and if its ascii
- also store its folded equivelent. */
- TRIE_BITMAP_SET(trie,uvc);
-
- /* store the folded codepoint */
- if ( folder ) TRIE_BITMAP_SET(trie,folder[ uvc ]);
-
- if ( !UTF ) {
- /* store first byte of utf8 representation of
- codepoints in the 127 < uvc < 256 range */
- if (127 < uvc && uvc < 192) {
- TRIE_BITMAP_SET(trie,194);
- } else if (191 < uvc ) {
- TRIE_BITMAP_SET(trie,195);
- /* && uvc < 256 -- we know uvc is < 256 already */
- }
- }
- set_bit = 0; /* We've done our bit :-) */
- }
- } else {
- SV** svpp;
- if ( !widecharmap )
- widecharmap = newHV();
-
- svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 1 );
-
- if ( !svpp )
- Perl_croak( aTHX_ "error creating/fetching widecharmap entry for 0x%"UVXf, uvc );
-
- if ( !SvTRUE( *svpp ) ) {
- sv_setiv( *svpp, ++trie->uniquecharcount );
- TRIE_STORE_REVCHAR;
- }
- }
- }
- if( cur == first ) {
- trie->minlen=chars;
- trie->maxlen=chars;
- } else if (chars < trie->minlen) {
- trie->minlen=chars;
- } else if (chars > trie->maxlen) {
- trie->maxlen=chars;
- }
-
- } /* end first pass */
- DEBUG_TRIE_COMPILE_r(
- PerlIO_printf( Perl_debug_log, "%*sTRIE(%s): W:%d C:%d Uq:%d Min:%d Max:%d\n",
- (int)depth * 2 + 2,"",
- ( widecharmap ? "UTF8" : "NATIVE" ), (int)word_count,
- (int)TRIE_CHARCOUNT(trie), trie->uniquecharcount,
- (int)trie->minlen, (int)trie->maxlen )
- );
- trie->wordlen = (U32 *) PerlMemShared_calloc( word_count, sizeof(U32) );
-
- /*
- We now know what we are dealing with in terms of unique chars and
- string sizes so we can calculate how much memory a naive
- representation using a flat table will take. If it's over a reasonable
- limit (as specified by ${^RE_TRIE_MAXBUF}) we use a more memory
- conservative but potentially much slower representation using an array
- of lists.
-
- At the end we convert both representations into the same compressed
- form that will be used in regexec.c for matching with. The latter
- is a form that cannot be used to construct with but has memory
- properties similar to the list form and access properties similar
- to the table form making it both suitable for fast searches and
- small enough that its feasable to store for the duration of a program.
-
- See the comment in the code where the compressed table is produced
- inplace from the flat tabe representation for an explanation of how
- the compression works.
-
- */
-
-
- if ( (IV)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1) > SvIV(re_trie_maxbuff) ) {
- /*
- Second Pass -- Array Of Lists Representation
-
- Each state will be represented by a list of charid:state records
- (reg_trie_trans_le) the first such element holds the CUR and LEN
- points of the allocated array. (See defines above).
-
- We build the initial structure using the lists, and then convert
- it into the compressed table form which allows faster lookups
- (but cant be modified once converted).
- */
-
- STRLEN transcount = 1;
-
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using list compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- TRIE_LIST_NEW(1);
- next_alloc = 2;
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- U32 state = 1; /* required init */
- U16 charid = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if (OP(noper) != NOTHING) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV** const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- if ( !svpp ) {
- charid = 0;
- } else {
- charid=(U16)SvIV( *svpp );
- }
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- if ( charid ) {
-
- U16 check;
- U32 newstate = 0;
-
- charid--;
- if ( !trie->states[ state ].trans.list ) {
- TRIE_LIST_NEW( state );
- }
- for ( check = 1; check <= TRIE_LIST_USED( state ); check++ ) {
- if ( TRIE_LIST_ITEM( state, check ).forid == charid ) {
- newstate = TRIE_LIST_ITEM( state, check ).newstate;
- break;
- }
- }
- if ( ! newstate ) {
- newstate = next_alloc++;
- TRIE_LIST_PUSH( state, charid, newstate );
- transcount++;
- }
- state = newstate;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- }
- }
- TRIE_HANDLE_WORD(state);
-
- } /* end second pass */
-
- /* next alloc is the NEXT state to be allocated */
- trie->statecount = next_alloc;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states,
- next_alloc
- * sizeof(reg_trie_state) );
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_list(trie, widecharmap,
- revcharmap, next_alloc,
- depth+1)
- );
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( transcount, sizeof(reg_trie_trans) );
- {
- U32 state;
- U32 tp = 0;
- U32 zp = 0;
-
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U32 base=0;
-
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, "tp: %d zp: %d ",tp,zp)
- );
- */
-
- if (trie->states[state].trans.list) {
- U16 minid=TRIE_LIST_ITEM( state, 1).forid;
- U16 maxid=minid;
- U16 idx;
-
- for( idx = 2 ; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U16 forid = TRIE_LIST_ITEM( state, idx).forid;
- if ( forid < minid ) {
- minid=forid;
- } else if ( forid > maxid ) {
- maxid=forid;
- }
- }
- if ( transcount < tp + maxid - minid + 1) {
- transcount *= 2;
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans,
- transcount
- * sizeof(reg_trie_trans) );
- Zero( trie->trans + (transcount / 2), transcount / 2 , reg_trie_trans );
- }
- base = trie->uniquecharcount + tp - minid;
- if ( maxid == minid ) {
- U32 set = 0;
- for ( ; zp < tp ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- base = trie->uniquecharcount + zp - minid;
- trie->trans[ zp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ zp ].check = state;
- set = 1;
- break;
- }
- }
- if ( !set ) {
- trie->trans[ tp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ tp ].check = state;
- tp++;
- zp = tp;
- }
- } else {
- for ( idx=1; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U32 tid = base - trie->uniquecharcount + TRIE_LIST_ITEM( state, idx ).forid;
- trie->trans[ tid ].next = TRIE_LIST_ITEM( state, idx ).newstate;
- trie->trans[ tid ].check = state;
- }
- tp += ( maxid - minid + 1 );
- }
- Safefree(trie->states[ state ].trans.list);
- }
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, " base: %d\n",base);
- );
- */
- trie->states[ state ].trans.base=base;
- }
- trie->lasttrans = tp + 1;
- }
- } else {
- /*
- Second Pass -- Flat Table Representation.
-
- we dont use the 0 slot of either trans[] or states[] so we add 1 to each.
- We know that we will need Charcount+1 trans at most to store the data
- (one row per char at worst case) So we preallocate both structures
- assuming worst case.
-
- We then construct the trie using only the .next slots of the entry
- structs.
-
- We use the .check field of the first entry of the node temporarily to
- make compression both faster and easier by keeping track of how many non
- zero fields are in the node.
-
- Since trans are numbered from 1 any 0 pointer in the table is a FAIL
- transition.
-
- There are two terms at use here: state as a TRIE_NODEIDX() which is a
- number representing the first entry of the node, and state as a
- TRIE_NODENUM() which is the trans number. state 1 is TRIE_NODEIDX(1) and
- TRIE_NODENUM(1), state 2 is TRIE_NODEIDX(2) and TRIE_NODENUM(3) if there
- are 2 entrys per node. eg:
-
- A B A B
- 1. 2 4 1. 3 7
- 2. 0 3 3. 0 5
- 3. 0 0 5. 0 0
- 4. 0 0 7. 0 0
-
- The table is internally in the right hand, idx form. However as we also
- have to deal with the states array which is indexed by nodenum we have to
- use TRIE_NODENUM() to convert.
-
- */
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using table compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( ( TRIE_CHARCOUNT(trie) + 1 )
- * trie->uniquecharcount + 1,
- sizeof(reg_trie_trans) );
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- next_alloc = trie->uniquecharcount + 1;
-
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
-
- U32 state = 1; /* required init */
-
- U16 charid = 0; /* sanity init */
- U32 accept_state = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
-
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if ( OP(noper) != NOTHING ) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV* const * const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- charid = svpp ? (U16)SvIV(*svpp) : 0;
- }
- if ( charid ) {
- charid--;
- if ( !trie->trans[ state + charid ].next ) {
- trie->trans[ state + charid ].next = next_alloc;
- trie->trans[ state ].check++;
- next_alloc += trie->uniquecharcount;
- }
- state = trie->trans[ state + charid ].next;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- }
- }
- accept_state = TRIE_NODENUM( state );
- TRIE_HANDLE_WORD(accept_state);
-
- } /* end second pass */
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_table(trie, widecharmap,
- revcharmap,
- next_alloc, depth+1));
-
- {
- /*
- * Inplace compress the table.*
-
- For sparse data sets the table constructed by the trie algorithm will
- be mostly 0/FAIL transitions or to put it another way mostly empty.
- (Note that leaf nodes will not contain any transitions.)
-
- This algorithm compresses the tables by eliminating most such
- transitions, at the cost of a modest bit of extra work during lookup:
-
- - Each states[] entry contains a .base field which indicates the
- index in the state[] array wheres its transition data is stored.
-
- - If .base is 0 there are no valid transitions from that node.
-
- - If .base is nonzero then charid is added to it to find an entry in
- the trans array.
-
- -If trans[states[state].base+charid].check!=state then the
- transition is taken to be a 0/Fail transition. Thus if there are fail
- transitions at the front of the node then the .base offset will point
- somewhere inside the previous nodes data (or maybe even into a node
- even earlier), but the .check field determines if the transition is
- valid.
-
- XXX - wrong maybe?
- The following process inplace converts the table to the compressed
- table: We first do not compress the root node 1,and mark its all its
- .check pointers as 1 and set its .base pointer as 1 as well. This
- allows to do a DFA construction from the compressed table later, and
- ensures that any .base pointers we calculate later are greater than
- 0.
-
- - We set 'pos' to indicate the first entry of the second node.
-
- - We then iterate over the columns of the node, finding the first and
- last used entry at l and m. We then copy l..m into pos..(pos+m-l),
- and set the .check pointers accordingly, and advance pos
- appropriately and repreat for the next node. Note that when we copy
- the next pointers we have to convert them from the original
- NODEIDX form to NODENUM form as the former is not valid post
- compression.
-
- - If a node has no transitions used we mark its base as 0 and do not
- advance the pos pointer.
-
- - If a node only has one transition we use a second pointer into the
- structure to fill in allocated fail transitions from other states.
- This pointer is independent of the main pointer and scans forward
- looking for null transitions that are allocated to a state. When it
- finds one it writes the single transition into the "hole". If the
- pointer doesnt find one the single transition is appended as normal.
-
- - Once compressed we can Renew/realloc the structures to release the
- excess space.
-
- See "Table-Compression Methods" in sec 3.9 of the Red Dragon,
- specifically Fig 3.47 and the associated pseudocode.
-
- demq
- */
- const U32 laststate = TRIE_NODENUM( next_alloc );
- U32 state, charid;
- U32 pos = 0, zp=0;
- trie->statecount = laststate;
-
- for ( state = 1 ; state < laststate ; state++ ) {
- U8 flag = 0;
- const U32 stateidx = TRIE_NODEIDX( state );
- const U32 o_used = trie->trans[ stateidx ].check;
- U32 used = trie->trans[ stateidx ].check;
- trie->trans[ stateidx ].check = 0;
-
- for ( charid = 0 ; used && charid < trie->uniquecharcount ; charid++ ) {
- if ( flag || trie->trans[ stateidx + charid ].next ) {
- if ( trie->trans[ stateidx + charid ].next ) {
- if (o_used == 1) {
- for ( ; zp < pos ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- break;
- }
- }
- trie->states[ state ].trans.base = zp + trie->uniquecharcount - charid ;
- trie->trans[ zp ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ zp ].check = state;
- if ( ++zp > pos ) pos = zp;
- break;
- }
- used--;
- }
- if ( !flag ) {
- flag = 1;
- trie->states[ state ].trans.base = pos + trie->uniquecharcount - charid ;
- }
- trie->trans[ pos ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ pos ].check = state;
- pos++;
- }
- }
- }
- trie->lasttrans = pos + 1;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states, laststate
- * sizeof(reg_trie_state) );
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log,
- "%*sAlloc: %d Orig: %"IVdf" elements, Final:%"IVdf". Savings of %%%5.2f\n",
- (int)depth * 2 + 2,"",
- (int)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1 ),
- (IV)next_alloc,
- (IV)pos,
- ( ( next_alloc - pos ) * 100 ) / (double)next_alloc );
- );
-
- } /* end table compress */
- }
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf(Perl_debug_log, "%*sStatecount:%"UVxf" Lasttrans:%"UVxf"\n",
- (int)depth * 2 + 2, "",
- (UV)trie->statecount,
- (UV)trie->lasttrans)
- );
- /* resize the trans array to remove unused space */
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans, trie->lasttrans
- * sizeof(reg_trie_trans) );
-
- /* and now dump out the compressed format */
- DEBUG_TRIE_COMPILE_r(dump_trie(trie, widecharmap, revcharmap, depth+1));
-
- { /* Modify the program and insert the new TRIE node*/
- U8 nodetype =(U8)(flags & 0xFF);
- char *str=NULL;
-
-#ifdef DEBUGGING
- regnode *optimize = NULL;
-#ifdef RE_TRACK_PATTERN_OFFSETS
-
- U32 mjd_offset = 0;
- U32 mjd_nodelen = 0;
-#endif /* RE_TRACK_PATTERN_OFFSETS */
-#endif /* DEBUGGING */
- /*
- This means we convert either the first branch or the first Exact,
- depending on whether the thing following (in 'last') is a branch
- or not and whther first is the startbranch (ie is it a sub part of
- the alternation or is it the whole thing.)
- Assuming its a sub part we conver the EXACT otherwise we convert
- the whole branch sequence, including the first.
- */
- /* Find the node we are going to overwrite */
- if ( first != startbranch || OP( last ) == BRANCH ) {
- /* branch sub-chain */
- NEXT_OFF( first ) = (U16)(last - first);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_r({
- mjd_offset= Node_Offset((convert));
- mjd_nodelen= Node_Length((convert));
- });
-#endif
- /* whole branch chain */
- }
-#ifdef RE_TRACK_PATTERN_OFFSETS
- else {
- DEBUG_r({
- const regnode *nop = NEXTOPER( convert );
- mjd_offset= Node_Offset((nop));
- mjd_nodelen= Node_Length((nop));
- });
- }
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%*sMJD offset:%"UVuf" MJD length:%"UVuf"\n",
- (int)depth * 2 + 2, "",
- (UV)mjd_offset, (UV)mjd_nodelen)
- );
-#endif
- /* But first we check to see if there is a common prefix we can
- split out as an EXACT and put in front of the TRIE node. */
- trie->startstate= 1;
- if ( trie->bitmap && !widecharmap && !trie->jump ) {
- U32 state;
- for ( state = 1 ; state < trie->statecount-1 ; state++ ) {
- U32 ofs = 0;
- I32 idx = -1;
- U32 count = 0;
- const U32 base = trie->states[ state ].trans.base;
-
- if ( trie->states[state].wordnum )
- count = 1;
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- if ( ++count > 1 ) {
- SV **tmp = av_fetch( revcharmap, ofs, 0);
- const U8 *ch = (U8*)SvPV_nolen_const( *tmp );
- if ( state == 1 ) break;
- if ( count == 2 ) {
- Zero(trie->bitmap, ANYOF_BITMAP_SIZE, char);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*sNew Start State=%"UVuf" Class: [",
- (int)depth * 2 + 2, "",
- (UV)state));
- if (idx >= 0) {
- SV ** const tmp = av_fetch( revcharmap, idx, 0);
- const U8 * const ch = (U8*)SvPV_nolen_const( *tmp );
-
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie, folder[ *ch ]);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%s", (char*)ch)
- );
- }
- }
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie,folder[ *ch ]);
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"%s", ch));
- }
- idx = ofs;
- }
- }
- if ( count == 1 ) {
- SV **tmp = av_fetch( revcharmap, idx, 0);
- STRLEN len;
- char *ch = SvPV( *tmp, len );
- DEBUG_OPTIMISE_r({
- SV *sv=sv_newmortal();
- PerlIO_printf( Perl_debug_log,
- "%*sPrefix State: %"UVuf" Idx:%"UVuf" Char='%s'\n",
- (int)depth * 2 + 2, "",
- (UV)state, (UV)idx,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 6,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- });
- if ( state==1 ) {
- OP( convert ) = nodetype;
- str=STRING(convert);
- STR_LEN(convert)=0;
- }
- STR_LEN(convert) += len;
- while (len--)
- *str++ = *ch++;
- } else {
-#ifdef DEBUGGING
- if (state>1)
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"]\n"));
-#endif
- break;
- }
- }
- if (str) {
- regnode *n = convert+NODE_SZ_STR(convert);
- NEXT_OFF(convert) = NODE_SZ_STR(convert);
- trie->startstate = state;
- trie->minlen -= (state - 1);
- trie->maxlen -= (state - 1);
-#ifdef DEBUGGING
- /* At least the UNICOS C compiler choked on this
- * being argument to DEBUG_r(), so let's just have
- * it right here. */
- if (
-#ifdef PERL_EXT_RE_BUILD
- 1
-#else
- DEBUG_r_TEST
-#endif
- ) {
- regnode *fix = convert;
- U32 word = trie->wordcount;
- mjd_nodelen++;
- Set_Node_Offset_Length(convert, mjd_offset, state - 1);
- while( ++fix < n ) {
- Set_Node_Offset_Length(fix, 0, 0);
- }
- while (word--) {
- SV ** const tmp = av_fetch( trie_words, word, 0 );
- if (tmp) {
- if ( STR_LEN(convert) <= SvCUR(*tmp) )
- sv_chop(*tmp, SvPV_nolen(*tmp) + STR_LEN(convert));
- else
- sv_chop(*tmp, SvPV_nolen(*tmp) + SvCUR(*tmp));
- }
- }
- }
-#endif
- if (trie->maxlen) {
- convert = n;
- } else {
- NEXT_OFF(convert) = (U16)(tail - convert);
- DEBUG_r(optimize= n);
- }
- }
- }
- if (!jumper)
- jumper = last;
- if ( trie->maxlen ) {
- NEXT_OFF( convert ) = (U16)(tail - convert);
- ARG_SET( convert, data_slot );
- /* Store the offset to the first unabsorbed branch in
- jump[0], which is otherwise unused by the jump logic.
- We use this when dumping a trie and during optimisation. */
- if (trie->jump)
- trie->jump[0] = (U16)(nextbranch - convert);
-
- /* XXXX */
- if ( !trie->states[trie->startstate].wordnum && trie->bitmap &&
- ( (char *)jumper - (char *)convert) >= (int)sizeof(struct regnode_charclass) )
- {
- OP( convert ) = TRIEC;
- Copy(trie->bitmap, ((struct regnode_charclass *)convert)->bitmap, ANYOF_BITMAP_SIZE, char);
- PerlMemShared_free(trie->bitmap);
- trie->bitmap= NULL;
- } else
- OP( convert ) = TRIE;
-
- /* store the type in the flags */
- convert->flags = nodetype;
- DEBUG_r({
- optimize = convert
- + NODE_STEP_REGNODE
- + regarglen[ OP( convert ) ];
- });
- /* XXX We really should free up the resource in trie now,
- as we won't use them - (which resources?) dmq */
- }
- /* needed for dumping*/
- DEBUG_r(if (optimize) {
- regnode *opt = convert;
-
- while ( ++opt < optimize) {
- Set_Node_Offset_Length(opt,0,0);
- }
- /*
- Try to clean up some of the debris left after the
- optimisation.
- */
- while( optimize < jumper ) {
- mjd_nodelen += Node_Length((optimize));
- OP( optimize ) = OPTIMIZED;
- Set_Node_Offset_Length(optimize,0,0);
- optimize++;
- }
- Set_Node_Offset_Length(convert,mjd_offset,mjd_nodelen);
- });
- } /* end node insert */
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, convert);
- RExC_rxi->data->data[ data_slot + 1 ] = (void*)widecharmap;
-#ifdef DEBUGGING
- RExC_rxi->data->data[ data_slot + TRIE_WORDS_OFFSET ] = (void*)trie_words;
- RExC_rxi->data->data[ data_slot + 3 ] = (void*)revcharmap;
-#else
- SvREFCNT_dec(revcharmap);
-#endif
- return trie->jump
- ? MADE_JUMP_TRIE
- : trie->startstate>1
- ? MADE_EXACT_TRIE
- : MADE_TRIE;
-}
-
-STATIC void
-S_make_trie_failtable(pTHX_ RExC_state_t *pRExC_state, regnode *source, regnode *stclass, U32 depth)
-{
-/* The Trie is constructed and compressed now so we can build a fail array now if its needed
-
- This is basically the Aho-Corasick algorithm. Its from exercise 3.31 and 3.32 in the
- "Red Dragon" -- Compilers, principles, techniques, and tools. Aho, Sethi, Ullman 1985/88
- ISBN 0-201-10088-6
-
- We find the fail state for each state in the trie, this state is the longest proper
- suffix of the current states 'word' that is also a proper prefix of another word in our
- trie. State 1 represents the word '' and is the thus the default fail state. This allows
- the DFA not to have to restart after its tried and failed a word at a given point, it
- simply continues as though it had been matching the other word in the first place.
- Consider
- 'abcdgu'=~/abcdefg|cdgu/
- When we get to 'd' we are still matching the first word, we would encounter 'g' which would
- fail, which would bring use to the state representing 'd' in the second word where we would
- try 'g' and succeed, prodceding to match 'cdgu'.
- */
- /* add a fail transition */
- const U32 trie_offset = ARG(source);
- reg_trie_data *trie=(reg_trie_data *)RExC_rxi->data->data[trie_offset];
- U32 *q;
- const U32 ucharcount = trie->uniquecharcount;
- const U32 numstates = trie->statecount;
- const U32 ubound = trie->lasttrans + ucharcount;
- U32 q_read = 0;
- U32 q_write = 0;
- U32 charid;
- U32 base = trie->states[ 1 ].trans.base;
- U32 *fail;
- reg_ac_data *aho;
- const U32 data_slot = add_data( pRExC_state, 1, "T" );
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE_FAILTABLE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
-
- ARG_SET( stclass, data_slot );
- aho = (reg_ac_data *) PerlMemShared_calloc( 1, sizeof(reg_ac_data) );
- RExC_rxi->data->data[ data_slot ] = (void*)aho;
- aho->trie=trie_offset;
- aho->states=(reg_trie_state *)PerlMemShared_malloc( numstates * sizeof(reg_trie_state) );
- Copy( trie->states, aho->states, numstates, reg_trie_state );
- Newxz( q, numstates, U32);
- aho->fail = (U32 *) PerlMemShared_calloc( numstates, sizeof(U32) );
- aho->refcount = 1;
- fail = aho->fail;
- /* initialize fail[0..1] to be 1 so that we always have
- a valid final fail state */
- fail[ 0 ] = fail[ 1 ] = 1;
-
- for ( charid = 0; charid < ucharcount ; charid++ ) {
- const U32 newstate = TRIE_TRANS_STATE( 1, base, ucharcount, charid, 0 );
- if ( newstate ) {
- q[ q_write ] = newstate;
- /* set to point at the root */
- fail[ q[ q_write++ ] ]=1;
- }
- }
- while ( q_read < q_write) {
- const U32 cur = q[ q_read++ % numstates ];
- base = trie->states[ cur ].trans.base;
-
- for ( charid = 0 ; charid < ucharcount ; charid++ ) {
- const U32 ch_state = TRIE_TRANS_STATE( cur, base, ucharcount, charid, 1 );
- if (ch_state) {
- U32 fail_state = cur;
- U32 fail_base;
- do {
- fail_state = fail[ fail_state ];
- fail_base = aho->states[ fail_state ].trans.base;
- } while ( !TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ) );
-
- fail_state = TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 );
- fail[ ch_state ] = fail_state;
- if ( !aho->states[ ch_state ].wordnum && aho->states[ fail_state ].wordnum )
- {
- aho->states[ ch_state ].wordnum = aho->states[ fail_state ].wordnum;
- }
- q[ q_write++ % numstates] = ch_state;
- }
- }
- }
- /* restore fail[0..1] to 0 so that we "fall out" of the AC loop
- when we fail in state 1, this allows us to use the
- charclass scan to find a valid start char. This is based on the principle
- that theres a good chance the string being searched contains lots of stuff
- that cant be a start char.
- */
- fail[ 0 ] = fail[ 1 ] = 0;
- DEBUG_TRIE_COMPILE_r({
- PerlIO_printf(Perl_debug_log,
- "%*sStclass Failtable (%"UVuf" states): 0",
- (int)(depth * 2), "", (UV)numstates
- );
- for( q_read=1; q_read<numstates; q_read++ ) {
- PerlIO_printf(Perl_debug_log, ", %"UVuf, (UV)fail[q_read]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
- Safefree(q);
- /*RExC_seen |= REG_SEEN_TRIEDFA;*/
-}
-
-
-/*
- * There are strange code-generation bugs caused on sparc64 by gcc-2.95.2.
- * These need to be revisited when a newer toolchain becomes available.
- */
-#if defined(__sparc64__) && defined(__GNUC__)
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
-# undef SPARC64_GCC_WORKAROUND
-# define SPARC64_GCC_WORKAROUND 1
-# endif
-#endif
-
-#define DEBUG_PEEP(str,scan,depth) \
- DEBUG_OPTIMISE_r({if (scan){ \
- SV * const mysv=sv_newmortal(); \
- regnode *Next = regnext(scan); \
- regprop(RExC_rx, mysv, scan); \
- PerlIO_printf(Perl_debug_log, "%*s" str ">%3d: %s (%d)\n", \
- (int)depth*2, "", REG_NODE_NUM(scan), SvPV_nolen_const(mysv),\
- Next ? (REG_NODE_NUM(Next)) : 0 ); \
- }});
-
-
-
-
-
-#define JOIN_EXACT(scan,min,flags) \
- if (PL_regkind[OP(scan)] == EXACT) \
- join_exact(pRExC_state,(scan),(min),(flags),NULL,depth+1)
-
-STATIC U32
-S_join_exact(pTHX_ RExC_state_t *pRExC_state, regnode *scan, I32 *min, U32 flags,regnode *val, U32 depth) {
- /* Merge several consecutive EXACTish nodes into one. */
- regnode *n = regnext(scan);
- U32 stringok = 1;
- regnode *next = scan + NODE_SZ_STR(scan);
- U32 merged = 0;
- U32 stopnow = 0;
-#ifdef DEBUGGING
- regnode *stop = scan;
- GET_RE_DEBUG_FLAGS_DECL;
-#else
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_JOIN_EXACT;
-#ifndef EXPERIMENTAL_INPLACESCAN
- PERL_UNUSED_ARG(flags);
- PERL_UNUSED_ARG(val);
-#endif
- DEBUG_PEEP("join",scan,depth);
-
- /* Skip NOTHING, merge EXACT*. */
- while (n &&
- ( PL_regkind[OP(n)] == NOTHING ||
- (stringok && (OP(n) == OP(scan))))
- && NEXT_OFF(n)
- && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) {
-
- if (OP(n) == TAIL || n > next)
- stringok = 0;
- if (PL_regkind[OP(n)] == NOTHING) {
- DEBUG_PEEP("skip:",n,depth);
- NEXT_OFF(scan) += NEXT_OFF(n);
- next = n + NODE_STEP_REGNODE;
-#ifdef DEBUGGING
- if (stringok)
- stop = n;
-#endif
- n = regnext(n);
- }
- else if (stringok) {
- const unsigned int oldl = STR_LEN(scan);
- regnode * const nnext = regnext(n);
-
- DEBUG_PEEP("merg",n,depth);
-
- merged++;
- if (oldl + STR_LEN(n) > U8_MAX)
- break;
- NEXT_OFF(scan) += NEXT_OFF(n);
- STR_LEN(scan) += STR_LEN(n);
- next = n + NODE_SZ_STR(n);
- /* Now we can overwrite *n : */
- Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char);
-#ifdef DEBUGGING
- stop = next - 1;
-#endif
- n = nnext;
- if (stopnow) break;
- }
-
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (flags && !NEXT_OFF(n)) {
- DEBUG_PEEP("atch", val, depth);
- if (reg_off_by_arg[OP(n)]) {
- ARG_SET(n, val - n);
- }
- else {
- NEXT_OFF(n) = val - n;
- }
- stopnow = 1;
- }
-#endif
- }
-
- if (UTF && ( OP(scan) == EXACTF ) && ( STR_LEN(scan) >= 6 ) ) {
- /*
- Two problematic code points in Unicode casefolding of EXACT nodes:
-
- U+0390 - GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS
- U+03B0 - GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS
-
- which casefold to
-
- Unicode UTF-8
-
- U+03B9 U+0308 U+0301 0xCE 0xB9 0xCC 0x88 0xCC 0x81
- U+03C5 U+0308 U+0301 0xCF 0x85 0xCC 0x88 0xCC 0x81
-
- This means that in case-insensitive matching (or "loose matching",
- as Unicode calls it), an EXACTF of length six (the UTF-8 encoded byte
- length of the above casefolded versions) can match a target string
- of length two (the byte length of UTF-8 encoded U+0390 or U+03B0).
- This would rather mess up the minimum length computation.
-
- What we'll do is to look for the tail four bytes, and then peek
- at the preceding two bytes to see whether we need to decrease
- the minimum length by four (six minus two).
-
- Thanks to the design of UTF-8, there cannot be false matches:
- A sequence of valid UTF-8 bytes cannot be a subsequence of
- another valid sequence of UTF-8 bytes.
-
- */
- char * const s0 = STRING(scan), *s, *t;
- char * const s1 = s0 + STR_LEN(scan) - 1;
- char * const s2 = s1 - 4;
-#ifdef EBCDIC /* RD tunifold greek 0390 and 03B0 */
- const char t0[] = "\xaf\x49\xaf\x42";
-#else
- const char t0[] = "\xcc\x88\xcc\x81";
-#endif
- const char * const t1 = t0 + 3;
-
- for (s = s0 + 2;
- s < s2 && (t = ninstr(s, s1, t0, t1));
- s = t + 4) {
-#ifdef EBCDIC
- if (((U8)t[-1] == 0x68 && (U8)t[-2] == 0xB4) ||
- ((U8)t[-1] == 0x46 && (U8)t[-2] == 0xB5))
-#else
- if (((U8)t[-1] == 0xB9 && (U8)t[-2] == 0xCE) ||
- ((U8)t[-1] == 0x85 && (U8)t[-2] == 0xCF))
-#endif
- *min -= 4;
- }
- }
-
-#ifdef DEBUGGING
- /* Allow dumping */
- n = scan + NODE_SZ_STR(scan);
- while (n <= stop) {
- if (PL_regkind[OP(n)] != NOTHING || OP(n) == NOTHING) {
- OP(n) = OPTIMIZED;
- NEXT_OFF(n) = 0;
- }
- n++;
- }
-#endif
- DEBUG_OPTIMISE_r(if (merged){DEBUG_PEEP("finl",scan,depth)});
- return stopnow;
-}
-
-/* REx optimizer. Converts nodes into quickier variants "in place".
- Finds fixed substrings. */
-
-/* Stops at toplevel WHILEM as well as at "last". At end *scanp is set
- to the position after last scanned or to NULL. */
-
-#define INIT_AND_WITHP \
- assert(!and_withp); \
- Newx(and_withp,1,struct regnode_charclass_class); \
- SAVEFREEPV(and_withp)
-
-/* this is a chain of data about sub patterns we are processing that
- need to be handled seperately/specially in study_chunk. Its so
- we can simulate recursion without losing state. */
-struct scan_frame;
-typedef struct scan_frame {
- regnode *last; /* last node to process in this frame */
- regnode *next; /* next node to process when last is reached */
- struct scan_frame *prev; /*previous frame*/
- I32 stop; /* what stopparen do we use */
-} scan_frame;
-
-
-#define SCAN_COMMIT(s, data, m) scan_commit(s, data, m, is_inf)
-
-#define CASE_SYNST_FNC(nAmE) \
-case nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break; \
-case N ## nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break
-
-
-
-STATIC I32
-S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp,
- I32 *minlenp, I32 *deltap,
- regnode *last,
- scan_data_t *data,
- I32 stopparen,
- U8* recursed,
- struct regnode_charclass_class *and_withp,
- U32 flags, U32 depth)
- /* scanp: Start here (read-write). */
- /* deltap: Write maxlen-minlen here. */
- /* last: Stop before this one. */
- /* data: string data about the pattern */
- /* stopparen: treat close N as END */
- /* recursed: which subroutines have we recursed into */
- /* and_withp: Valid if flags & SCF_DO_STCLASS_OR */
-{
- dVAR;
- I32 min = 0, pars = 0, code;
- regnode *scan = *scanp, *next;
- I32 delta = 0;
- int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF);
- int is_inf_internal = 0; /* The studied chunk is infinite */
- I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0;
- scan_data_t data_fake;
- SV *re_trie_maxbuff = NULL;
- regnode *first_non_open = scan;
- I32 stopmin = I32_MAX;
- scan_frame *frame = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_STUDY_CHUNK;
-
-#ifdef DEBUGGING
- StructCopy(&zero_scan_data, &data_fake, scan_data_t);
-#endif
-
- if ( depth == 0 ) {
- while (first_non_open && OP(first_non_open) == OPEN)
- first_non_open=regnext(first_non_open);
- }
-
-
- fake_study_recurse:
- while ( scan && OP(scan) != END && scan < last ){
- /* Peephole optimizer: */
- DEBUG_STUDYDATA("Peep:", data,depth);
- DEBUG_PEEP("Peep",scan,depth);
- JOIN_EXACT(scan,&min,0);
-
- /* Follow the next-chain of the current node and optimize
- away all the NOTHINGs from it. */
- if (OP(scan) != CURLYX) {
- const int max = (reg_off_by_arg[OP(scan)]
- ? I32_MAX
- /* I32 may be smaller than U16 on CRAYs! */
- : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX));
- int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan));
- int noff;
- regnode *n = scan;
-
- /* Skip NOTHING and LONGJMP. */
- while ((n = regnext(n))
- && ((PL_regkind[OP(n)] == NOTHING && (noff = NEXT_OFF(n)))
- || ((OP(n) == LONGJMP) && (noff = ARG(n))))
- && off + noff < max)
- off += noff;
- if (reg_off_by_arg[OP(scan)])
- ARG(scan) = off;
- else
- NEXT_OFF(scan) = off;
- }
-
-
-
- /* The principal pseudo-switch. Cannot be a switch, since we
- look into several different things. */
- if (OP(scan) == BRANCH || OP(scan) == BRANCHJ
- || OP(scan) == IFTHEN) {
- next = regnext(scan);
- code = OP(scan);
- /* demq: the op(next)==code check is to see if we have "branch-branch" AFAICT */
-
- if (OP(next) == code || code == IFTHEN) {
- /* NOTE - There is similar code to this block below for handling
- TRIE nodes on a re-study. If you change stuff here check there
- too. */
- I32 max1 = 0, min1 = I32_MAX, num = 0;
- struct regnode_charclass_class accum;
- regnode * const startbranch=scan;
-
- if (flags & SCF_DO_SUBSTR)
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- while (OP(scan) == code) {
- I32 deltanext, minnext, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- num++;
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
-
- data_fake.pos_delta = delta;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- if (code != BRANCH)
- scan = NEXTOPER(scan);
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- /* we suppose the run is continuous, last=next...*/
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- next, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- if (min1 > minnext)
- min1 = minnext;
- if (max1 < minnext + deltanext)
- max1 = minnext + deltanext;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
- scan = next;
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > minnext)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- if (code == IFTHEN && num < 2) /* Empty ELSE branch */
- min1 = 0;
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
-
- if (PERL_ENABLE_TRIE_OPTIMISATION && OP( startbranch ) == BRANCH ) {
- /* demq.
-
- Assuming this was/is a branch we are dealing with: 'scan' now
- points at the item that follows the branch sequence, whatever
- it is. We now start at the beginning of the sequence and look
- for subsequences of
-
- BRANCH->EXACT=>x1
- BRANCH->EXACT=>x2
- tail
-
- which would be constructed from a pattern like /A|LIST|OF|WORDS/
-
- If we can find such a subseqence we need to turn the first
- element into a trie and then add the subsequent branch exact
- strings to the trie.
-
- We have two cases
-
- 1. patterns where the whole set of branch can be converted.
-
- 2. patterns where only a subset can be converted.
-
- In case 1 we can replace the whole set with a single regop
- for the trie. In case 2 we need to keep the start and end
- branchs so
-
- 'BRANCH EXACT; BRANCH EXACT; BRANCH X'
- becomes BRANCH TRIE; BRANCH X;
-
- There is an additional case, that being where there is a
- common prefix, which gets split out into an EXACT like node
- preceding the TRIE node.
-
- If x(1..n)==tail then we can do a simple trie, if not we make
- a "jump" trie, such that when we match the appropriate word
- we "jump" to the appopriate tail node. Essentailly we turn
- a nested if into a case structure of sorts.
-
- */
-
- int made=0;
- if (!re_trie_maxbuff) {
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff))
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- if ( SvIV(re_trie_maxbuff)>=0 ) {
- regnode *cur;
- regnode *first = (regnode *)NULL;
- regnode *last = (regnode *)NULL;
- regnode *tail = scan;
- U8 optype = 0;
- U32 count=0;
-
-#ifdef DEBUGGING
- SV * const mysv = sv_newmortal(); /* for dumping */
-#endif
- /* var tail is used because there may be a TAIL
- regop in the way. Ie, the exacts will point to the
- thing following the TAIL, but the last branch will
- point at the TAIL. So we advance tail. If we
- have nested (?:) we may have to move through several
- tails.
- */
-
- while ( OP( tail ) == TAIL ) {
- /* this is the TAIL generated by (?:) */
- tail = regnext( tail );
- }
-
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, tail );
- PerlIO_printf( Perl_debug_log, "%*s%s%s\n",
- (int)depth * 2 + 2, "",
- "Looking for TRIE'able sequences. Tail node is: ",
- SvPV_nolen_const( mysv )
- );
- });
-
- /*
-
- step through the branches, cur represents each
- branch, noper is the first thing to be matched
- as part of that branch and noper_next is the
- regnext() of that node. if noper is an EXACT
- and noper_next is the same as scan (our current
- position in the regex) then the EXACT branch is
- a possible optimization target. Once we have
- two or more consequetive such branches we can
- create a trie of the EXACT's contents and stich
- it in place. If the sequence represents all of
- the branches we eliminate the whole thing and
- replace it with a single TRIE. If it is a
- subsequence then we need to stitch it in. This
- means the first branch has to remain, and needs
- to be repointed at the item on the branch chain
- following the last branch optimized. This could
- be either a BRANCH, in which case the
- subsequence is internal, or it could be the
- item following the branch sequence in which
- case the subsequence is at the end.
-
- */
-
- /* dont use tail as the end marker for this traverse */
- for ( cur = startbranch ; cur != scan ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
-#if defined(DEBUGGING) || defined(NOJUMPTRIE)
- regnode * const noper_next = regnext( noper );
-#endif
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log, "%*s- %s (%d)",
- (int)depth * 2 + 2,"", SvPV_nolen_const( mysv ), REG_NODE_NUM(cur) );
-
- regprop(RExC_rx, mysv, noper);
- PerlIO_printf( Perl_debug_log, " -> %s",
- SvPV_nolen_const(mysv));
-
- if ( noper_next ) {
- regprop(RExC_rx, mysv, noper_next );
- PerlIO_printf( Perl_debug_log,"\t=> %s\t",
- SvPV_nolen_const(mysv));
- }
- PerlIO_printf( Perl_debug_log, "(First==%d,Last==%d,Cur==%d)\n",
- REG_NODE_NUM(first), REG_NODE_NUM(last), REG_NODE_NUM(cur) );
- });
- if ( (((first && optype!=NOTHING) ? OP( noper ) == optype
- : PL_regkind[ OP( noper ) ] == EXACT )
- || OP(noper) == NOTHING )
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- && count < U16_MAX)
- {
- count++;
- if ( !first || optype == NOTHING ) {
- if (!first) first = cur;
- optype = OP( noper );
- } else {
- last = cur;
- }
- } else {
-/*
- Currently we do not believe that the trie logic can
- handle case insensitive matching properly when the
- pattern is not unicode (thus forcing unicode semantics).
-
- If/when this is fixed the following define can be swapped
- in below to fully enable trie logic.
-
-#define TRIE_TYPE_IS_SAFE 1
-
-*/
-#define TRIE_TYPE_IS_SAFE (UTF || optype==EXACT)
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- make_trie( pRExC_state,
- startbranch, first, cur, tail, count,
- optype, depth+1 );
- }
- if ( PL_regkind[ OP( noper ) ] == EXACT
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- ){
- count = 1;
- first = cur;
- optype = OP( noper );
- } else {
- count = 0;
- first = NULL;
- optype = 0;
- }
- last = NULL;
- }
- }
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log,
- "%*s- %s (%d) <SCAN FINISHED>\n", (int)depth * 2 + 2,
- "", SvPV_nolen_const( mysv ),REG_NODE_NUM(cur));
-
- });
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- made= make_trie( pRExC_state, startbranch, first, scan, tail, count, optype, depth+1 );
-#ifdef TRIE_STUDY_OPT
- if ( ((made == MADE_EXACT_TRIE &&
- startbranch == first)
- || ( first_non_open == first )) &&
- depth==0 ) {
- flags |= SCF_TRIE_RESTUDY;
- if ( startbranch == first
- && scan == tail )
- {
- RExC_seen &=~REG_TOP_LEVEL_BRANCHES;
- }
- }
-#endif
- }
- }
-
- } /* do trie */
-
- }
- else if ( code == BRANCHJ ) { /* single branch is optimized. */
- scan = NEXTOPER(NEXTOPER(scan));
- } else /* single branch is optimized. */
- scan = NEXTOPER(scan);
- continue;
- } else if (OP(scan) == SUSPEND || OP(scan) == GOSUB || OP(scan) == GOSTART) {
- scan_frame *newframe = NULL;
- I32 paren;
- regnode *start;
- regnode *end;
-
- if (OP(scan) != SUSPEND) {
- /* set the pointer */
- if (OP(scan) == GOSUB) {
- paren = ARG(scan);
- RExC_recurse[ARG2L(scan)] = scan;
- start = RExC_open_parens[paren-1];
- end = RExC_close_parens[paren-1];
- } else {
- paren = 0;
- start = RExC_rxi->program + 1;
- end = RExC_opend;
- }
- if (!recursed) {
- Newxz(recursed, (((RExC_npar)>>3) +1), U8);
- SAVEFREEPV(recursed);
- }
- if (!PAREN_TEST(recursed,paren+1)) {
- PAREN_SET(recursed,paren+1);
- Newx(newframe,1,scan_frame);
- } else {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- } else {
- Newx(newframe,1,scan_frame);
- paren = stopparen;
- start = scan+2;
- end = regnext(scan);
- }
- if (newframe) {
- assert(start);
- assert(end);
- SAVEFREEPV(newframe);
- newframe->next = regnext(scan);
- newframe->last = last;
- newframe->stop = stopparen;
- newframe->prev = frame;
-
- frame = newframe;
- scan = start;
- stopparen = paren;
- last = end;
-
- continue;
- }
- }
- else if (OP(scan) == EXACT) {
- I32 l = STR_LEN(scan);
- UV uc;
- if (UTF) {
- const U8 * const s = (U8*)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- } else {
- uc = *((U8*)STRING(scan));
- }
- min += l;
- if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */
- /* The code below prefers earlier match for fixed
- offset, later match for variable offset. */
- if (data->last_end == -1) { /* Update the start info. */
- data->last_start_min = data->pos_min;
- data->last_start_max = is_inf
- ? I32_MAX : data->pos_min + data->pos_delta;
- }
- sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan));
- if (UTF)
- SvUTF8_on(data->last_found);
- {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += utf8_length((U8*)STRING(scan),
- (U8*)STRING(scan)+STR_LEN(scan));
- }
- data->last_end = data->pos_min + l;
- data->pos_min += l; /* As in the first entry. */
- data->flags &= ~SF_BEFORE_EOL;
- }
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && (!(data->start_class->flags & ANYOF_FOLD)
- || !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- )
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- if (uc < 0x100)
- data->start_class->flags &= ~ANYOF_UNICODE_ALL;
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- /* false positive possible if the class is case-folded */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- else
- data->start_class->flags |= ANYOF_UNICODE_ALL;
- data->start_class->flags &= ~ANYOF_EOS;
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (PL_regkind[OP(scan)] == EXACT) { /* But OP != EXACT! */
- I32 l = STR_LEN(scan);
- UV uc = *((U8*)STRING(scan));
-
- /* Search for fixed substrings supports EXACT only. */
- if (flags & SCF_DO_SUBSTR) {
- assert(data);
- SCAN_COMMIT(pRExC_state, data, minlenp);
- }
- if (UTF) {
- const U8 * const s = (U8 *)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- }
- min += l;
- if (flags & SCF_DO_SUBSTR)
- data->pos_min += l;
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat) {
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- data->start_class->flags |= ANYOF_FOLD;
- if (OP(scan) == EXACTFL)
- data->start_class->flags |= ANYOF_LOCALE;
- }
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- if (data->start_class->flags & ANYOF_FOLD) {
- /* false positive possible if the class is case-folded.
- Assume that the locale settings are the same... */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- }
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (strchr((const char*)PL_varies,OP(scan))) {
- I32 mincount, maxcount, minnext, deltanext, fl = 0;
- I32 f = flags, pos_before = 0;
- regnode * const oscan = scan;
- struct regnode_charclass_class this_class;
- struct regnode_charclass_class *oclass = NULL;
- I32 next_is_eval = 0;
-
- switch (PL_regkind[OP(scan)]) {
- case WHILEM: /* End of (?:...)* . */
- scan = NEXTOPER(scan);
- goto finish;
- case PLUS:
- if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) {
- next = NEXTOPER(scan);
- if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) {
- mincount = 1;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- }
- if (flags & SCF_DO_SUBSTR)
- data->pos_min++;
- min++;
- /* Fall through. */
- case STAR:
- if (flags & SCF_DO_STCLASS) {
- mincount = 0;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- is_inf = is_inf_internal = 1;
- scan = regnext(scan);
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot extend fixed substrings */
- data->longest = &(data->longest_float);
- }
- goto optimize_curly_tail;
- case CURLY:
- if (stopparen>0 && (OP(scan)==CURLYN || OP(scan)==CURLYM)
- && (scan->flags == stopparen))
- {
- mincount = 1;
- maxcount = 1;
- } else {
- mincount = ARG1(scan);
- maxcount = ARG2(scan);
- }
- next = regnext(scan);
- if (OP(scan) == CURLYX) {
- I32 lp = (data ? *(data->last_closep) : 0);
- scan->flags = ((lp <= (I32)U8_MAX) ? (U8)lp : U8_MAX);
- }
- scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- next_is_eval = (OP(scan) == EVAL);
- do_curly:
- if (flags & SCF_DO_SUBSTR) {
- if (mincount == 0) SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot extend fixed substrings */
- pos_before = data->pos_min;
- }
- if (data) {
- fl = data->flags;
- data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL);
- if (is_inf)
- data->flags |= SF_IS_INF;
- }
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- oclass = data->start_class;
- data->start_class = &this_class;
- f |= SCF_DO_STCLASS_AND;
- f &= ~SCF_DO_STCLASS_OR;
- }
- /* These are the cases when once a subexpression
- fails at a particular position, it cannot succeed
- even after backtracking at the enclosing scope.
-
- XXXX what if minimal match and we are at the
- initial run of {n,m}? */
- if ((mincount != maxcount - 1) && (maxcount != REG_INFTY))
- f &= ~SCF_WHILEM_VISITED_POS;
-
- /* This will finish on WHILEM, setting scan, or on NULL: */
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- last, data, stopparen, recursed, NULL,
- (mincount == 0
- ? (f & ~SCF_DO_SUBSTR) : f),depth+1);
-
- if (flags & SCF_DO_STCLASS)
- data->start_class = oclass;
- if (mincount == 0 || minnext == 0) {
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&this_class, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- } else { /* Non-zero len */
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- cl_and(data->start_class, and_withp);
- }
- else if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class, &this_class);
- flags &= ~SCF_DO_STCLASS;
- }
- if (!scan) /* It was not CURLYX, but CURLY. */
- scan = next;
- if ( /* ? quantifier ok, except for (?{ ... }) */
- (next_is_eval || !(mincount == 0 && maxcount == 1))
- && (minnext == 0) && (deltanext == 0)
- && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR))
- && maxcount <= REG_INFTY/3) /* Complement check for big count */
- {
- ckWARNreg(RExC_parse,
- "Quantifier unexpected on zero-length expression");
- }
-
- min += minnext * mincount;
- is_inf_internal |= ((maxcount == REG_INFTY
- && (minnext + deltanext) > 0)
- || deltanext == I32_MAX);
- is_inf |= is_inf_internal;
- delta += (minnext + deltanext) * maxcount - minnext * mincount;
-
- /* Try powerful optimization CURLYX => CURLYN. */
- if ( OP(oscan) == CURLYX && data
- && data->flags & SF_IN_PAR
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext && minnext == 1 ) {
- /* Try to optimize to CURLYN. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS;
- regnode * const nxt1 = nxt;
-#ifdef DEBUGGING
- regnode *nxt2;
-#endif
-
- /* Skip open. */
- nxt = regnext(nxt);
- if (!strchr((const char*)PL_simple,OP(nxt))
- && !(PL_regkind[OP(nxt)] == EXACT
- && STR_LEN(nxt) == 1))
- goto nogo;
-#ifdef DEBUGGING
- nxt2 = nxt;
-#endif
- nxt = regnext(nxt);
- if (OP(nxt) != CLOSE)
- goto nogo;
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt+2; /*close->while*/
- }
- /* Now we know that nxt2 is the only contents: */
- oscan->flags = (U8)ARG(nxt);
- OP(oscan) = CURLYN;
- OP(nxt1) = NOTHING; /* was OPEN. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */
-#endif
- }
- nogo:
-
- /* Try optimization CURLYX => CURLYM. */
- if ( OP(oscan) == CURLYX && data
- && !(data->flags & SF_HAS_PAR)
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext /* atom is fixed width */
- && minnext != 0 /* CURLYM can't handle zero width */
- ) {
- /* XXXX How to optimize if data == 0? */
- /* Optimize to a simpler form. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */
- regnode *nxt2;
-
- OP(oscan) = CURLYM;
- while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/
- && (OP(nxt2) != WHILEM))
- nxt = nxt2;
- OP(nxt2) = SUCCEED; /* Whas WHILEM */
- /* Need to optimize away parenths. */
- if (data->flags & SF_IN_PAR) {
- /* Set the parenth number. */
- regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/
-
- if (OP(nxt) != CLOSE)
- FAIL("Panic opt close");
- oscan->flags = (U8)ARG(nxt);
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt2+1; /*close->NOTHING*/
- }
- OP(nxt1) = OPTIMIZED; /* was OPEN. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */
-#endif
-#if 0
- while ( nxt1 && (OP(nxt1) != WHILEM)) {
- regnode *nnxt = regnext(nxt1);
-
- if (nnxt == nxt) {
- if (reg_off_by_arg[OP(nxt1)])
- ARG_SET(nxt1, nxt2 - nxt1);
- else if (nxt2 - nxt1 < U16_MAX)
- NEXT_OFF(nxt1) = nxt2 - nxt1;
- else
- OP(nxt) = NOTHING; /* Cannot beautify */
- }
- nxt1 = nnxt;
- }
-#endif
- /* Optimize again: */
- study_chunk(pRExC_state, &nxt1, minlenp, &deltanext, nxt,
- NULL, stopparen, recursed, NULL, 0,depth+1);
- }
- else
- oscan->flags = 0;
- }
- else if ((OP(oscan) == CURLYX)
- && (flags & SCF_WHILEM_VISITED_POS)
- /* See the comment on a similar expression above.
- However, this time it not a subexpression
- we care about, but the expression itself. */
- && (maxcount == REG_INFTY)
- && data && ++data->whilem_c < 16) {
- /* This stays as CURLYX, we can put the count/of pair. */
- /* Find WHILEM (as in regexec.c) */
- regnode *nxt = oscan + NEXT_OFF(oscan);
-
- if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */
- nxt += ARG(nxt);
- PREVOPER(nxt)->flags = (U8)(data->whilem_c
- | (RExC_whilem_seen << 4)); /* On WHILEM */
- }
- if (data && fl & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (flags & SCF_DO_SUBSTR) {
- SV *last_str = NULL;
- int counted = mincount != 0;
-
- if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */
-#if defined(SPARC64_GCC_WORKAROUND)
- I32 b = 0;
- STRLEN l = 0;
- const char *s = NULL;
- I32 old = 0;
-
- if (pos_before >= data->last_start_min)
- b = pos_before;
- else
- b = data->last_start_min;
-
- l = 0;
- s = SvPV_const(data->last_found, l);
- old = b - data->last_start_min;
-
-#else
- I32 b = pos_before >= data->last_start_min
- ? pos_before : data->last_start_min;
- STRLEN l;
- const char * const s = SvPV_const(data->last_found, l);
- I32 old = b - data->last_start_min;
-#endif
-
- if (UTF)
- old = utf8_hop((U8*)s, old) - (U8*)s;
-
- l -= old;
- /* Get the added string: */
- last_str = newSVpvn_utf8(s + old, l, UTF);
- if (deltanext == 0 && pos_before == b) {
- /* What was added is a constant string */
- if (mincount > 1) {
- SvGROW(last_str, (mincount * l) + 1);
- repeatcpy(SvPVX(last_str) + l,
- SvPVX_const(last_str), l, mincount - 1);
- SvCUR_set(last_str, SvCUR(last_str) * mincount);
- /* Add additional parts. */
- SvCUR_set(data->last_found,
- SvCUR(data->last_found) - l);
- sv_catsv(data->last_found, last_str);
- {
- SV * sv = data->last_found;
- MAGIC *mg =
- SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += CHR_SVLEN(last_str) - l;
- }
- data->last_end += l * (mincount - 1);
- }
- } else {
- /* start offset must point into the last copy */
- data->last_start_min += minnext * (mincount - 1);
- data->last_start_max += is_inf ? I32_MAX
- : (maxcount - 1) * (minnext + data->pos_delta);
- }
- }
- /* It is counted once already... */
- data->pos_min += minnext * (mincount - counted);
- data->pos_delta += - counted * deltanext +
- (minnext + deltanext) * maxcount - minnext * mincount;
- if (mincount != maxcount) {
- /* Cannot extend fixed substrings found inside
- the group. */
- SCAN_COMMIT(pRExC_state,data,minlenp);
- if (mincount && last_str) {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
-
- if (mg)
- mg->mg_len = -1;
- sv_setsv(sv, last_str);
- data->last_end = data->pos_min;
- data->last_start_min =
- data->pos_min - CHR_SVLEN(last_str);
- data->last_start_max = is_inf
- ? I32_MAX
- : data->pos_min + data->pos_delta
- - CHR_SVLEN(last_str);
- }
- data->longest = &(data->longest_float);
- }
- SvREFCNT_dec(last_str);
- }
- if (data && (fl & SF_HAS_EVAL))
- data->flags |= SF_HAS_EVAL;
- optimize_curly_tail:
- if (OP(oscan) != CURLYX) {
- while (PL_regkind[OP(next = regnext(oscan))] == NOTHING
- && NEXT_OFF(next))
- NEXT_OFF(oscan) += NEXT_OFF(next);
- }
- continue;
- default: /* REF and CLUMP only? */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR)
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- break;
- }
- }
- else if (OP(scan) == LNBREAK) {
- if (flags & SCF_DO_STCLASS) {
- int value = 0;
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
- if (flags & SCF_DO_STCLASS_AND) {
- for (value = 0; value < 256; value++)
- if (!is_VERTWS_cp(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- for (value = 0; value < 256; value++)
- if (is_VERTWS_cp(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- min += 1;
- delta += 1;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += 1;
- data->longest = &(data->longest_float);
- }
-
- }
- else if (OP(scan) == FOLDCHAR) {
- int d = ARG(scan)==0xDF ? 1 : 2;
- flags &= ~SCF_DO_STCLASS;
- min += 1;
- delta += d;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += d;
- data->longest = &(data->longest_float);
- }
- }
- else if (strchr((const char*)PL_simple,OP(scan))) {
- int value = 0;
-
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->pos_min++;
- }
- min++;
- if (flags & SCF_DO_STCLASS) {
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
-
- /* Some of the logic below assumes that switching
- locale on will only add false positives. */
- switch (PL_regkind[OP(scan)]) {
- case SANY:
- default:
- do_default:
- /* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- break;
- case REG_ANY:
- if (OP(scan) == SANY)
- goto do_default;
- if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */
- value = (ANYOF_BITMAP_TEST(data->start_class,'\n')
- || (data->start_class->flags & ANYOF_CLASS));
- cl_anything(pRExC_state, data->start_class);
- }
- if (flags & SCF_DO_STCLASS_AND || !value)
- ANYOF_BITMAP_CLEAR(data->start_class,'\n');
- break;
- case ANYOF:
- if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class,
- (struct regnode_charclass_class*)scan);
- else
- cl_or(pRExC_state, data->start_class,
- (struct regnode_charclass_class*)scan);
- break;
- case ALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case ALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- }
- else {
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- data->start_class->flags |= ANYOF_LOCALE;
- }
- break;
- case NALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- }
- break;
- case SPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- else {
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case SPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- }
- break;
- case NSPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- else {
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NSPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- }
- break;
- case DIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT);
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NDIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT);
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- CASE_SYNST_FNC(VERTWS);
- CASE_SYNST_FNC(HORIZWS);
-
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (PL_regkind[OP(scan)] == EOL && flags & SCF_DO_SUBSTR) {
- data->flags |= (OP(scan) == MEOL
- ? SF_BEFORE_MEOL
- : SF_BEFORE_SEOL);
- }
- else if ( PL_regkind[OP(scan)] == BRANCHJ
- /* Lookbehind, or need to calculate parens/evals/stclass: */
- && (scan->flags || data || (flags & SCF_DO_STCLASS))
- && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) {
- if ( !PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- || OP(scan) == UNLESSM )
- {
- /* Negative Lookahead/lookbehind
- In this case we can't do fixed string optimisation.
- */
-
- I32 deltanext, minnext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
- minnext = study_chunk(pRExC_state, &nscan, minlenp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f, depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (minnext > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)minnext;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (f & SCF_DO_STCLASS_AND) {
- if (flags & SCF_DO_STCLASS_OR) {
- /* OR before, AND after: ideally we would recurse with
- * data_fake to get the AND applied by study of the
- * remainder of the pattern, and then derecurse;
- * *** HACK *** for now just treat as "no information".
- * See [perl #56690].
- */
- cl_init(pRExC_state, data->start_class);
- } else {
- /* AND before and after: combine and continue */
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- }
-#if PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- else {
- /* Positive Lookahead/lookbehind
- In this case we can do fixed string optimisation,
- but we must be careful about it. Note in the case of
- lookbehind the positions will be offset by the minimum
- length of the pattern, something we won't know about
- until after the recurse.
- */
- I32 deltanext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
- /* We use SAVEFREEPV so that when the full compile
- is finished perl will clean up the allocated
- minlens when its all done. This was we don't
- have to worry about freeing them when we know
- they wont be used, which would be a pain.
- */
- I32 *minnextp;
- Newx( minnextp, 1, I32 );
- SAVEFREEPV(minnextp);
-
- if (data) {
- StructCopy(data, &data_fake, scan_data_t);
- if ((flags & SCF_DO_SUBSTR) && data->last_found) {
- f |= SCF_DO_SUBSTR;
- if (scan->flags)
- SCAN_COMMIT(pRExC_state, &data_fake,minlenp);
- data_fake.last_found=newSVsv(data->last_found);
- }
- }
- else
- data_fake.last_closep = &fake;
- data_fake.flags = 0;
- data_fake.pos_delta = delta;
- if (is_inf)
- data_fake.flags |= SF_IS_INF;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
-
- *minnextp = study_chunk(pRExC_state, &nscan, minnextp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f,depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (*minnextp > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)*minnextp;
- }
-
- *minnextp += min;
-
- if (f & SCF_DO_STCLASS_AND) {
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- if ((flags & SCF_DO_SUBSTR) && data_fake.last_found) {
- if (RExC_rx->minlen<*minnextp)
- RExC_rx->minlen=*minnextp;
- SCAN_COMMIT(pRExC_state, &data_fake, minnextp);
- SvREFCNT_dec(data_fake.last_found);
-
- if ( data_fake.minlen_fixed != minlenp )
- {
- data->offset_fixed= data_fake.offset_fixed;
- data->minlen_fixed= data_fake.minlen_fixed;
- data->lookbehind_fixed+= scan->flags;
- }
- if ( data_fake.minlen_float != minlenp )
- {
- data->minlen_float= data_fake.minlen_float;
- data->offset_float_min=data_fake.offset_float_min;
- data->offset_float_max=data_fake.offset_float_max;
- data->lookbehind_float+= scan->flags;
- }
- }
- }
-
-
- }
-#endif
- }
- else if (OP(scan) == OPEN) {
- if (stopparen != (I32)ARG(scan))
- pars++;
- }
- else if (OP(scan) == CLOSE) {
- if (stopparen == (I32)ARG(scan)) {
- break;
- }
- if ((I32)ARG(scan) == is_par) {
- next = regnext(scan);
-
- if ( next && (OP(next) != WHILEM) && next < last)
- is_par = 0; /* Disable optimization */
- }
- if (data)
- *(data->last_closep) = ARG(scan);
- }
- else if (OP(scan) == EVAL) {
- if (data)
- data->flags |= SF_HAS_EVAL;
- }
- else if ( PL_regkind[OP(scan)] == ENDLIKE ) {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- flags &= ~SCF_DO_SUBSTR;
- }
- if (data && OP(scan)==ACCEPT) {
- data->flags |= SCF_SEEN_ACCEPT;
- if (stopmin > min)
- stopmin = min;
- }
- }
- else if (OP(scan) == LOGICAL && scan->flags == 2) /* Embedded follows */
- {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- else if (OP(scan) == GPOS) {
- if (!(RExC_rx->extflags & RXf_GPOS_FLOAT) &&
- !(delta || is_inf || (data && data->pos_delta)))
- {
- if (!(RExC_rx->extflags & RXf_ANCH) && (flags & SCF_DO_SUBSTR))
- RExC_rx->extflags |= RXf_ANCH_GPOS;
- if (RExC_rx->gofs < (U32)min)
- RExC_rx->gofs = min;
- } else {
- RExC_rx->extflags |= RXf_GPOS_FLOAT;
- RExC_rx->gofs = 0;
- }
- }
-#ifdef TRIE_STUDY_OPT
-#ifdef FULL_TRIE_STUDY
- else if (PL_regkind[OP(scan)] == TRIE) {
- /* NOTE - There is similar code to this block above for handling
- BRANCH nodes on the initial study. If you change stuff here
- check there too. */
- regnode *trie_node= scan;
- regnode *tail= regnext(scan);
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- I32 max1 = 0, min1 = I32_MAX;
- struct regnode_charclass_class accum;
-
- if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */
- SCAN_COMMIT(pRExC_state, data,minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- if (!trie->jump) {
- min1= trie->minlen;
- max1= trie->maxlen;
- } else {
- const regnode *nextbranch= NULL;
- U32 word;
-
- for ( word=1 ; word <= trie->wordcount ; word++)
- {
- I32 deltanext=0, minnext=0, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- if (trie->jump[word]) {
- if (!nextbranch)
- nextbranch = trie_node + trie->jump[0];
- scan= trie_node + trie->jump[word];
- /* We go from the jump point to the branch that follows
- it. Note this means we need the vestigal unused branches
- even though they arent otherwise used.
- */
- minnext = study_chunk(pRExC_state, &scan, minlenp,
- &deltanext, (regnode *)nextbranch, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode*)nextbranch);
-
- if (min1 > (I32)(minnext + trie->minlen))
- min1 = minnext + trie->minlen;
- if (max1 < (I32)(minnext + deltanext + trie->maxlen))
- max1 = minnext + deltanext + trie->maxlen;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
-
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > min + min1)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- }
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- scan= tail;
- continue;
- }
-#else
- else if (PL_regkind[OP(scan)] == TRIE) {
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- U8*bang=NULL;
-
- min += trie->minlen;
- delta += (trie->maxlen - trie->minlen);
- flags &= ~SCF_DO_STCLASS; /* xxx */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += trie->minlen;
- data->pos_delta += (trie->maxlen - trie->minlen);
- if (trie->maxlen != trie->minlen)
- data->longest = &(data->longest_float);
- }
- if (trie->jump) /* no more substrings -- for now /grr*/
- flags &= ~SCF_DO_SUBSTR;
- }
-#endif /* old or new */
-#endif /* TRIE_STUDY_OPT */
-
- /* Else: zero-length, ignore. */
- scan = regnext(scan);
- }
- if (frame) {
- last = frame->last;
- scan = frame->next;
- stopparen = frame->stop;
- frame = frame->prev;
- goto fake_study_recurse;
- }
-
- finish:
- assert(!frame);
- DEBUG_STUDYDATA("pre-fin:",data,depth);
-
- *scanp = scan;
- *deltap = is_inf_internal ? I32_MAX : delta;
- if (flags & SCF_DO_SUBSTR && is_inf)
- data->pos_delta = I32_MAX - data->pos_min;
- if (is_par > (I32)U8_MAX)
- is_par = 0;
- if (is_par && pars==1 && data) {
- data->flags |= SF_IN_PAR;
- data->flags &= ~SF_HAS_PAR;
- }
- else if (pars && data) {
- data->flags |= SF_HAS_PAR;
- data->flags &= ~SF_IN_PAR;
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- if (flags & SCF_TRIE_RESTUDY)
- data->flags |= SCF_TRIE_RESTUDY;
-
- DEBUG_STUDYDATA("post-fin:",data,depth);
-
- return min < stopmin ? min : stopmin;
-}
-
-STATIC U32
-S_add_data(RExC_state_t *pRExC_state, U32 n, const char *s)
-{
- U32 count = RExC_rxi->data ? RExC_rxi->data->count : 0;
-
- PERL_ARGS_ASSERT_ADD_DATA;
-
- Renewc(RExC_rxi->data,
- sizeof(*RExC_rxi->data) + sizeof(void*) * (count + n - 1),
- char, struct reg_data);
- if(count)
- Renew(RExC_rxi->data->what, count + n, U8);
- else
- Newx(RExC_rxi->data->what, n, U8);
- RExC_rxi->data->count = count + n;
- Copy(s, RExC_rxi->data->what + count, n, U8);
- return count;
-}
-
-/*XXX: todo make this not included in a non debugging perl */
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_reginitcolors(pTHX)
-{
- dVAR;
- const char * const s = PerlEnv_getenv("PERL_RE_COLORS");
- if (s) {
- char *t = savepv(s);
- int i = 0;
- PL_colors[0] = t;
- while (++i < 6) {
- t = strchr(t, '\t');
- if (t) {
- *t = '\0';
- PL_colors[i] = ++t;
- }
- else
- PL_colors[i] = t = (char *)"";
- }
- } else {
- int i = 0;
- while (i < 6)
- PL_colors[i++] = (char *)"";
- }
- PL_colorset = 1;
-}
-#endif
-
-
-#ifdef TRIE_STUDY_OPT
-#define CHECK_RESTUDY_GOTO \
- if ( \
- (data.flags & SCF_TRIE_RESTUDY) \
- && ! restudied++ \
- ) goto reStudy
-#else
-#define CHECK_RESTUDY_GOTO
-#endif
-
-/*
- - pregcomp - compile a regular expression into internal code
- *
- * We can't allocate space until we know how big the compiled form will be,
- * but we can't compile it (and thus know how big it is) until we've got a
- * place to put the code. So we cheat: we compile it twice, once with code
- * generation turned off and size counting turned on, and once "for real".
- * This also means that we don't allocate space until we are sure that the
- * thing really will compile successfully, and we never have to move the
- * code and thus invalidate pointers into it. (Note that it has to be in
- * one piece because free() must be able to free it all.) [NB: not true in perl]
- *
- * Beware that the optimization-preparation code in here knows about some
- * of the structure of the compiled regexp. [I'll say.]
- */
-
-
-
-#ifndef PERL_IN_XSUB_RE
-#define RE_ENGINE_PTR &reh_regexp_engine
-#else
-extern const struct regexp_engine my_reg_engine;
-#define RE_ENGINE_PTR &my_reg_engine
-#endif
-
-#ifndef PERL_IN_XSUB_RE
-REGEXP *
-Perl_pregcomp(pTHX_ SV * const pattern, const U32 flags)
-{
- dVAR;
- HV * const table = GvHV(PL_hintgv);
-
- PERL_ARGS_ASSERT_PREGCOMP;
-
- /* Dispatch a request to compile a regexp to correct
- regexp engine. */
- if (table) {
- SV **ptr= hv_fetchs(table, "regcomp", FALSE);
- GET_RE_DEBUG_FLAGS_DECL;
- if (ptr && SvIOK(*ptr) && SvIV(*ptr)) {
- const regexp_engine *eng=INT2PTR(regexp_engine*,SvIV(*ptr));
- DEBUG_COMPILE_r({
- PerlIO_printf(Perl_debug_log, "Using engine %"UVxf"\n",
- SvIV(*ptr));
- });
- return CALLREGCOMP_ENG(eng, pattern, flags);
- }
- }
- return Perl_re_compile(aTHX_ pattern, flags);
-}
-#endif
-
-REGEXP *
-Perl_re_compile(pTHX_ SV * const pattern, U32 pm_flags)
-{
- dVAR;
- REGEXP *rx;
- struct regexp *r;
- register regexp_internal *ri;
- STRLEN plen;
- char *exp = SvPV(pattern, plen);
- char* xend = exp + plen;
- regnode *scan;
- I32 flags;
- I32 minlen = 0;
- I32 sawplus = 0;
- I32 sawopen = 0;
- scan_data_t data;
- RExC_state_t RExC_state;
- RExC_state_t * const pRExC_state = &RExC_state;
-#ifdef TRIE_STUDY_OPT
- int restudied= 0;
- RExC_state_t copyRExC_state;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_COMPILE;
-
- DEBUG_r(if (!PL_colorset) reginitcolors());
-
- RExC_utf8 = RExC_orig_utf8 = SvUTF8(pattern);
-
- DEBUG_COMPILE_r({
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RExC_utf8,
- dsv, exp, plen, 60);
- PerlIO_printf(Perl_debug_log, "%sCompiling REx%s %s\n",
- PL_colors[4],PL_colors[5],s);
- });
-
-redo_first_pass:
- RExC_precomp = exp;
- RExC_flags = pm_flags;
- RExC_sawback = 0;
-
- RExC_seen = 0;
- RExC_seen_zerolen = *exp == '^' ? -1 : 0;
- RExC_seen_evals = 0;
- RExC_extralen = 0;
-
- /* First pass: determine size, legality. */
- RExC_parse = exp;
- RExC_start = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_nestroot = 0;
- RExC_size = 0L;
- RExC_emit = &PL_regdummy;
- RExC_whilem_seen = 0;
- RExC_charnames = NULL;
- RExC_open_parens = NULL;
- RExC_close_parens = NULL;
- RExC_opend = NULL;
- RExC_paren_names = NULL;
-#ifdef DEBUGGING
- RExC_paren_name_list = NULL;
-#endif
- RExC_recurse = NULL;
- RExC_recurse_count = 0;
-
-#if 0 /* REGC() is (currently) a NOP at the first pass.
- * Clever compilers notice this and complain. --jhi */
- REGC((U8)REG_MAGIC, (char*)RExC_emit);
-#endif
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n"));
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- RExC_precomp = NULL;
- return(NULL);
- }
- if (RExC_utf8 && !RExC_orig_utf8) {
- /* It's possible to write a regexp in ascii that represents Unicode
- codepoints outside of the byte range, such as via \x{100}. If we
- detect such a sequence we have to convert the entire pattern to utf8
- and then recompile, as our sizing calculation will have been based
- on 1 byte == 1 character, but we will need to use utf8 to encode
- at least some part of the pattern, and therefore must convert the whole
- thing.
- XXX: somehow figure out how to make this less expensive...
- -- dmq */
- STRLEN len = plen;
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log,
- "UTF8 mismatch! Converting to utf8 for resizing and compile\n"));
- exp = (char*)Perl_bytes_to_utf8(aTHX_ (U8*)exp, &len);
- xend = exp + len;
- RExC_orig_utf8 = RExC_utf8;
- SAVEFREEPV(exp);
- goto redo_first_pass;
- }
- DEBUG_PARSE_r({
- PerlIO_printf(Perl_debug_log,
- "Required size %"IVdf" nodes\n"
- "Starting second pass (creation)\n",
- (IV)RExC_size);
- RExC_lastnum=0;
- RExC_lastparse=NULL;
- });
- /* Small enough for pointer-storage convention?
- If extralen==0, this means that we will not need long jumps. */
- if (RExC_size >= 0x10000L && RExC_extralen)
- RExC_size += RExC_extralen;
- else
- RExC_extralen = 0;
- if (RExC_whilem_seen > 15)
- RExC_whilem_seen = 15;
-
- /* Allocate space and zero-initialize. Note, the two step process
- of zeroing when in debug mode, thus anything assigned has to
- happen after that */
- rx = (REGEXP*) newSV_type(SVt_REGEXP);
- r = (struct regexp*)SvANY(rx);
- Newxc(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode),
- char, regexp_internal);
- if ( r == NULL || ri == NULL )
- FAIL("Regexp out of space");
-#ifdef DEBUGGING
- /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */
- Zero(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode), char);
-#else
- /* bulk initialize base fields with 0. */
- Zero(ri, sizeof(regexp_internal), char);
-#endif
-
- /* non-zero initialization begins here */
- RXi_SET( r, ri );
- r->engine= RE_ENGINE_PTR;
- r->extflags = pm_flags;
- {
- bool has_p = ((r->extflags & RXf_PMf_KEEPCOPY) == RXf_PMf_KEEPCOPY);
- bool has_minus = ((r->extflags & RXf_PMf_STD_PMMOD) != RXf_PMf_STD_PMMOD);
- bool has_runon = ((RExC_seen & REG_SEEN_RUN_ON_COMMENT)==REG_SEEN_RUN_ON_COMMENT);
- U16 reganch = (U16)((r->extflags & RXf_PMf_STD_PMMOD)
- >> RXf_PMf_STD_PMMOD_SHIFT);
- const char *fptr = STD_PAT_MODS; /*"msix"*/
- char *p;
- const STRLEN wraplen = plen + has_minus + has_p + has_runon
- + (sizeof(STD_PAT_MODS) - 1)
- + (sizeof("(?:)") - 1);
-
- p = sv_grow(MUTABLE_SV(rx), wraplen + 1);
- SvCUR_set(rx, wraplen);
- SvPOK_on(rx);
- SvFLAGS(rx) |= SvUTF8(pattern);
- *p++='('; *p++='?';
- if (has_p)
- *p++ = KEEPCOPY_PAT_MOD; /*'p'*/
- {
- char *r = p + (sizeof(STD_PAT_MODS) - 1) + has_minus - 1;
- char *colon = r + 1;
- char ch;
-
- while((ch = *fptr++)) {
- if(reganch & 1)
- *p++ = ch;
- else
- *r-- = ch;
- reganch >>= 1;
- }
- if(has_minus) {
- *r = '-';
- p = colon;
- }
- }
-
- *p++ = ':';
- Copy(RExC_precomp, p, plen, char);
- assert ((RX_WRAPPED(rx) - p) < 16);
- r->pre_prefix = p - RX_WRAPPED(rx);
- p += plen;
- if (has_runon)
- *p++ = '\n';
- *p++ = ')';
- *p = 0;
- }
-
- r->intflags = 0;
- r->nparens = RExC_npar - 1; /* set early to validate backrefs */
-
- if (RExC_seen & REG_SEEN_RECURSE) {
- Newxz(RExC_open_parens, RExC_npar,regnode *);
- SAVEFREEPV(RExC_open_parens);
- Newxz(RExC_close_parens,RExC_npar,regnode *);
- SAVEFREEPV(RExC_close_parens);
- }
-
- /* Useful during FAIL. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- Newxz(ri->u.offsets, 2*RExC_size+1, U32); /* MJD 20001228 */
- DEBUG_OFFSETS_r(PerlIO_printf(Perl_debug_log,
- "%s %"UVuf" bytes for offset annotations.\n",
- ri->u.offsets ? "Got" : "Couldn't get",
- (UV)((2*RExC_size+1) * sizeof(U32))));
-#endif
- SetProgLen(ri,RExC_size);
- RExC_rx_sv = rx;
- RExC_rx = r;
- RExC_rxi = ri;
- REH_CALL_COMP_BEGIN_HOOK(pRExC_state->rx);
-
- /* Second pass: emit code. */
- RExC_flags = pm_flags; /* don't let top level (?i) bleed */
- RExC_parse = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_emit_start = ri->program;
- RExC_emit = ri->program;
- RExC_emit_bound = ri->program + RExC_size + 1;
-
- /* Store the count of eval-groups for security checks: */
- RExC_rx->seen_evals = RExC_seen_evals;
- REGC((U8)REG_MAGIC, (char*) RExC_emit++);
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- ReREFCNT_dec(rx);
- return(NULL);
- }
- /* XXXX To minimize changes to RE engine we always allocate
- 3-units-long substrs field. */
- Newx(r->substrs, 1, struct reg_substr_data);
- if (RExC_recurse_count) {
- Newxz(RExC_recurse,RExC_recurse_count,regnode *);
- SAVEFREEPV(RExC_recurse);
- }
-
-reStudy:
- r->minlen = minlen = sawplus = sawopen = 0;
- Zero(r->substrs, 1, struct reg_substr_data);
-
-#ifdef TRIE_STUDY_OPT
- if (!restudied) {
- StructCopy(&zero_scan_data, &data, scan_data_t);
- copyRExC_state = RExC_state;
- } else {
- U32 seen=RExC_seen;
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log,"Restudying\n"));
-
- RExC_state = copyRExC_state;
- if (seen & REG_TOP_LEVEL_BRANCHES)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
- else
- RExC_seen &= ~REG_TOP_LEVEL_BRANCHES;
- if (data.last_found) {
- SvREFCNT_dec(data.longest_fixed);
- SvREFCNT_dec(data.longest_float);
- SvREFCNT_dec(data.last_found);
- }
- StructCopy(&zero_scan_data, &data, scan_data_t);
- }
-#else
- StructCopy(&zero_scan_data, &data, scan_data_t);
-#endif
-
- /* Dig out information for optimizations. */
- r->extflags = RExC_flags; /* was pm_op */
- /*dmq: removed as part of de-PMOP: pm->op_pmflags = RExC_flags; */
-
- if (UTF)
- SvUTF8_on(rx); /* Unicode in it? */
- ri->regstclass = NULL;
- if (RExC_naughty >= 10) /* Probably an expensive pattern. */
- r->intflags |= PREGf_NAUGHTY;
- scan = ri->program + 1; /* First BRANCH. */
-
- /* testing for BRANCH here tells us whether there is "must appear"
- data in the pattern. If there is then we can use it for optimisations */
- if (!(RExC_seen & REG_TOP_LEVEL_BRANCHES)) { /* Only one top-level choice. */
- I32 fake;
- STRLEN longest_float_length, longest_fixed_length;
- struct regnode_charclass_class ch_class; /* pointed to by data */
- int stclass_flag;
- I32 last_close = 0; /* pointed to by data */
- regnode *first= scan;
- regnode *first_next= regnext(first);
-
- /*
- * Skip introductions and multiplicators >= 1
- * so that we can extract the 'meat' of the pattern that must
- * match in the large if() sequence following.
- * NOTE that EXACT is NOT covered here, as it is normally
- * picked up by the optimiser separately.
- *
- * This is unfortunate as the optimiser isnt handling lookahead
- * properly currently.
- *
- */
- while ((OP(first) == OPEN && (sawopen = 1)) ||
- /* An OR of *one* alternative - should not happen now. */
- (OP(first) == BRANCH && OP(first_next) != BRANCH) ||
- /* for now we can't handle lookbehind IFMATCH*/
- (OP(first) == IFMATCH && !first->flags) ||
- (OP(first) == PLUS) ||
- (OP(first) == MINMOD) ||
- /* An {n,m} with n>0 */
- (PL_regkind[OP(first)] == CURLY && ARG1(first) > 0) ||
- (OP(first) == NOTHING && PL_regkind[OP(first_next)] != END ))
- {
- /*
- * the only op that could be a regnode is PLUS, all the rest
- * will be regnode_1 or regnode_2.
- *
- */
- if (OP(first) == PLUS)
- sawplus = 1;
- else
- first += regarglen[OP(first)];
-
- first = NEXTOPER(first);
- first_next= regnext(first);
- }
-
- /* Starting-point info. */
- again:
- DEBUG_PEEP("first:",first,0);
- /* Ignore EXACT as we deal with it later. */
- if (PL_regkind[OP(first)] == EXACT) {
- if (OP(first) == EXACT)
- NOOP; /* Empty, get anchored substr later. */
- else if ((OP(first) == EXACTF || OP(first) == EXACTFL))
- ri->regstclass = first;
- }
-#ifdef TRIE_STCLASS
- else if (PL_regkind[OP(first)] == TRIE &&
- ((reg_trie_data *)ri->data->data[ ARG(first) ])->minlen>0)
- {
- regnode *trie_op;
- /* this can happen only on restudy */
- if ( OP(first) == TRIE ) {
- struct regnode_1 *trieop = (struct regnode_1 *)
- PerlMemShared_calloc(1, sizeof(struct regnode_1));
- StructCopy(first,trieop,struct regnode_1);
- trie_op=(regnode *)trieop;
- } else {
- struct regnode_charclass *trieop = (struct regnode_charclass *)
- PerlMemShared_calloc(1, sizeof(struct regnode_charclass));
- StructCopy(first,trieop,struct regnode_charclass);
- trie_op=(regnode *)trieop;
- }
- OP(trie_op)+=2;
- make_trie_failtable(pRExC_state, (regnode *)first, trie_op, 0);
- ri->regstclass = trie_op;
- }
-#endif
- else if (strchr((const char*)PL_simple,OP(first)))
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOUND ||
- PL_regkind[OP(first)] == NBOUND)
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOL) {
- r->extflags |= (OP(first) == MBOL
- ? RXf_ANCH_MBOL
- : (OP(first) == SBOL
- ? RXf_ANCH_SBOL
- : RXf_ANCH_BOL));
- first = NEXTOPER(first);
- goto again;
- }
- else if (OP(first) == GPOS) {
- r->extflags |= RXf_ANCH_GPOS;
- first = NEXTOPER(first);
- goto again;
- }
- else if ((!sawopen || !RExC_sawback) &&
- (OP(first) == STAR &&
- PL_regkind[OP(NEXTOPER(first))] == REG_ANY) &&
- !(r->extflags & RXf_ANCH) && !(RExC_seen & REG_SEEN_EVAL))
- {
- /* turn .* into ^.* with an implied $*=1 */
- const int type =
- (OP(NEXTOPER(first)) == REG_ANY)
- ? RXf_ANCH_MBOL
- : RXf_ANCH_SBOL;
- r->extflags |= type;
- r->intflags |= PREGf_IMPLICIT;
- first = NEXTOPER(first);
- goto again;
- }
- if (sawplus && (!sawopen || !RExC_sawback)
- && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */
- /* x+ must match at the 1st pos of run of x's */
- r->intflags |= PREGf_SKIP;
-
- /* Scan is after the zeroth branch, first is atomic matcher. */
-#ifdef TRIE_STUDY_OPT
- DEBUG_PARSE_r(
- if (!restudied)
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#else
- DEBUG_PARSE_r(
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#endif
-
-
- /*
- * If there's something expensive in the r.e., find the
- * longest literal string that must appear and make it the
- * regmust. Resolve ties in favor of later strings, since
- * the regstart check works with the beginning of the r.e.
- * and avoiding duplication strengthens checking. Not a
- * strong reason, but sufficient in the absence of others.
- * [Now we resolve ties in favor of the earlier string if
- * it happens that c_offset_min has been invalidated, since the
- * earlier string may buy us something the later one won't.]
- */
-
- data.longest_fixed = newSVpvs("");
- data.longest_float = newSVpvs("");
- data.last_found = newSVpvs("");
- data.longest = &(data.longest_fixed);
- first = scan;
- if (!ri->regstclass) {
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- stclass_flag = SCF_DO_STCLASS_AND;
- } else /* XXXX Check for BOUND? */
- stclass_flag = 0;
- data.last_closep = &last_close;
-
- minlen = study_chunk(pRExC_state, &first, &minlen, &fake, scan + RExC_size, /* Up to end */
- &data, -1, NULL, NULL,
- SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag,0);
-
-
- CHECK_RESTUDY_GOTO;
-
-
- if ( RExC_npar == 1 && data.longest == &(data.longest_fixed)
- && data.last_start_min == 0 && data.last_end > 0
- && !RExC_seen_zerolen
- && !(RExC_seen & REG_SEEN_VERBARG)
- && (!(RExC_seen & REG_SEEN_GPOS) || (r->extflags & RXf_ANCH_GPOS)))
- r->extflags |= RXf_CHECK_ALL;
- scan_commit(pRExC_state, &data,&minlen,0);
- SvREFCNT_dec(data.last_found);
-
- /* Note that code very similar to this but for anchored string
- follows immediately below, changes may need to be made to both.
- Be careful.
- */
- longest_float_length = CHR_SVLEN(data.longest_float);
- if (longest_float_length
- || (data.flags & SF_FL_BEFORE_EOL
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */
- && data.offset_fixed == data.offset_float_min
- && SvCUR(data.longest_fixed) == SvCUR(data.longest_float))
- goto remove_float; /* As in (a)+. */
-
- /* copy the information about the longest float from the reg_scan_data
- over to the program. */
- if (SvUTF8(data.longest_float)) {
- r->float_utf8 = data.longest_float;
- r->float_substr = NULL;
- } else {
- r->float_substr = data.longest_float;
- r->float_utf8 = NULL;
- }
- /* float_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_float ? *(data.minlen_float)
- : (I32)longest_float_length;
- r->float_end_shift = ml - data.offset_float_min
- - longest_float_length + (SvTAIL(data.longest_float) != 0)
- + data.lookbehind_float;
- r->float_min_offset = data.offset_float_min - data.lookbehind_float;
- r->float_max_offset = data.offset_float_max;
- if (data.offset_float_max < I32_MAX) /* Don't offset infinity */
- r->float_max_offset -= data.lookbehind_float;
-
- t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_float, t ? FBMcf_TAIL : 0);
- }
- else {
- remove_float:
- r->float_substr = r->float_utf8 = NULL;
- SvREFCNT_dec(data.longest_float);
- longest_float_length = 0;
- }
-
- /* Note that code very similar to this but for floating string
- is immediately above, changes may need to be made to both.
- Be careful.
- */
- longest_fixed_length = CHR_SVLEN(data.longest_fixed);
- if (longest_fixed_length
- || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- /* copy the information about the longest fixed
- from the reg_scan_data over to the program. */
- if (SvUTF8(data.longest_fixed)) {
- r->anchored_utf8 = data.longest_fixed;
- r->anchored_substr = NULL;
- } else {
- r->anchored_substr = data.longest_fixed;
- r->anchored_utf8 = NULL;
- }
- /* fixed_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_fixed ? *(data.minlen_fixed)
- : (I32)longest_fixed_length;
- r->anchored_end_shift = ml - data.offset_fixed
- - longest_fixed_length + (SvTAIL(data.longest_fixed) != 0)
- + data.lookbehind_fixed;
- r->anchored_offset = data.offset_fixed - data.lookbehind_fixed;
-
- t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_fixed, t ? FBMcf_TAIL : 0);
- }
- else {
- r->anchored_substr = r->anchored_utf8 = NULL;
- SvREFCNT_dec(data.longest_fixed);
- longest_fixed_length = 0;
- }
- if (ri->regstclass
- && (OP(ri->regstclass) == REG_ANY || OP(ri->regstclass) == SANY))
- ri->regstclass = NULL;
- if ((!(r->anchored_substr || r->anchored_utf8) || r->anchored_offset)
- && stclass_flag
- && !(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV *sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
-
- /* A temporary algorithm prefers floated substr to fixed one to dig more info. */
- if (longest_fixed_length > longest_float_length) {
- r->check_end_shift = r->anchored_end_shift;
- r->check_substr = r->anchored_substr;
- r->check_utf8 = r->anchored_utf8;
- r->check_offset_min = r->check_offset_max = r->anchored_offset;
- if (r->extflags & RXf_ANCH_SINGLE)
- r->extflags |= RXf_NOSCAN;
- }
- else {
- r->check_end_shift = r->float_end_shift;
- r->check_substr = r->float_substr;
- r->check_utf8 = r->float_utf8;
- r->check_offset_min = r->float_min_offset;
- r->check_offset_max = r->float_max_offset;
- }
- /* XXXX Currently intuiting is not compatible with ANCH_GPOS.
- This should be changed ASAP! */
- if ((r->check_substr || r->check_utf8) && !(r->extflags & RXf_ANCH_GPOS)) {
- r->extflags |= RXf_USE_INTUIT;
- if (SvTAIL(r->check_substr ? r->check_substr : r->check_utf8))
- r->extflags |= RXf_INTUIT_TAIL;
- }
- /* XXX Unneeded? dmq (shouldn't as this is handled elsewhere)
- if ( (STRLEN)minlen < longest_float_length )
- minlen= longest_float_length;
- if ( (STRLEN)minlen < longest_fixed_length )
- minlen= longest_fixed_length;
- */
- }
- else {
- /* Several toplevels. Best we can is to set minlen. */
- I32 fake;
- struct regnode_charclass_class ch_class;
- I32 last_close = 0;
-
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "\nMulti Top Level\n"));
-
- scan = ri->program + 1;
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- data.last_closep = &last_close;
-
-
- minlen = study_chunk(pRExC_state, &scan, &minlen, &fake, scan + RExC_size,
- &data, -1, NULL, NULL, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS,0);
-
- CHECK_RESTUDY_GOTO;
-
- r->check_substr = r->check_utf8 = r->anchored_substr = r->anchored_utf8
- = r->float_substr = r->float_utf8 = NULL;
- if (!(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV* sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
- }
-
- /* Guard against an embedded (?=) or (?<=) with a longer minlen than
- the "real" pattern. */
- DEBUG_OPTIMISE_r({
- PerlIO_printf(Perl_debug_log,"minlen: %"IVdf" r->minlen:%"IVdf"\n",
- (IV)minlen, (IV)r->minlen);
- });
- r->minlenret = minlen;
- if (r->minlen < minlen)
- r->minlen = minlen;
-
- if (RExC_seen & REG_SEEN_GPOS)
- r->extflags |= RXf_GPOS_SEEN;
- if (RExC_seen & REG_SEEN_LOOKBEHIND)
- r->extflags |= RXf_LOOKBEHIND_SEEN;
- if (RExC_seen & REG_SEEN_EVAL)
- r->extflags |= RXf_EVAL_SEEN;
- if (RExC_seen & REG_SEEN_CANY)
- r->extflags |= RXf_CANY_SEEN;
- if (RExC_seen & REG_SEEN_VERBARG)
- r->intflags |= PREGf_VERBARG_SEEN;
- if (RExC_seen & REG_SEEN_CUTGROUP)
- r->intflags |= PREGf_CUTGROUP_SEEN;
- if (RExC_paren_names)
- RXp_PAREN_NAMES(r) = MUTABLE_HV(SvREFCNT_inc(RExC_paren_names));
- else
- RXp_PAREN_NAMES(r) = NULL;
-
-#ifdef STUPID_PATTERN_CHECKS
- if (RX_PRELEN(rx) == 0)
- r->extflags |= RXf_NULL;
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else if (RX_PRELEN(rx) == 3 && memEQ("\\s+", RX_PRECOMP(rx), 3))
- r->extflags |= RXf_WHITE;
- else if (RX_PRELEN(rx) == 1 && RXp_PRECOMP(rx)[0] == '^')
- r->extflags |= RXf_START_ONLY;
-#else
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else {
- regnode *first = ri->program + 1;
- U8 fop = OP(first);
- U8 nop = OP(NEXTOPER(first));
-
- if (PL_regkind[fop] == NOTHING && nop == END)
- r->extflags |= RXf_NULL;
- else if (PL_regkind[fop] == BOL && nop == END)
- r->extflags |= RXf_START_ONLY;
- else if (fop == PLUS && nop ==SPACE && OP(regnext(first))==END)
- r->extflags |= RXf_WHITE;
- }
-#endif
-#ifdef DEBUGGING
- if (RExC_paren_names) {
- ri->name_list_idx = add_data( pRExC_state, 1, "p" );
- ri->data->data[ri->name_list_idx] = (void*)SvREFCNT_inc(RExC_paren_name_list);
- } else
-#endif
- ri->name_list_idx = 0;
-
- if (RExC_recurse_count) {
- for ( ; RExC_recurse_count ; RExC_recurse_count-- ) {
- const regnode *scan = RExC_recurse[RExC_recurse_count-1];
- ARG2L_SET( scan, RExC_open_parens[ARG(scan)-1] - scan );
- }
- }
- Newxz(r->offs, RExC_npar, regexp_paren_pair);
- /* assume we don't need to swap parens around before we match */
-
- DEBUG_DUMP_r({
- PerlIO_printf(Perl_debug_log,"Final program:\n");
- regdump(r);
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_OFFSETS_r(if (ri->u.offsets) {
- const U32 len = ri->u.offsets[0];
- U32 i;
- GET_RE_DEBUG_FLAGS_DECL;
- PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)ri->u.offsets[0]);
- for (i = 1; i <= len; i++) {
- if (ri->u.offsets[i*2-1] || ri->u.offsets[i*2])
- PerlIO_printf(Perl_debug_log, "%"UVuf":%"UVuf"[%"UVuf"] ",
- (UV)i, (UV)ri->u.offsets[i*2-1], (UV)ri->u.offsets[i*2]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
-#endif
- return rx;
-}
-
-#undef RE_ENGINE_PTR
-
-
-SV*
-Perl_reg_named_buff(pTHX_ REGEXP * const rx, SV * const key, SV * const value,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF;
-
- PERL_UNUSED_ARG(value);
-
- if (flags & RXapif_FETCH) {
- return reg_named_buff_fetch(rx, key, flags);
- } else if (flags & (RXapif_STORE | RXapif_DELETE | RXapif_CLEAR)) {
- Perl_croak(aTHX_ "%s", PL_no_modify);
- return NULL;
- } else if (flags & RXapif_EXISTS) {
- return reg_named_buff_exists(rx, key, flags)
- ? &PL_sv_yes
- : &PL_sv_no;
- } else if (flags & RXapif_REGNAMES) {
- return reg_named_buff_all(rx, flags);
- } else if (flags & (RXapif_SCALAR | RXapif_REGNAMES_COUNT)) {
- return reg_named_buff_scalar(rx, flags);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_iter(pTHX_ REGEXP * const rx, const SV * const lastkey,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ITER;
- PERL_UNUSED_ARG(lastkey);
-
- if (flags & RXapif_FIRSTKEY)
- return reg_named_buff_firstkey(rx, flags);
- else if (flags & RXapif_NEXTKEY)
- return reg_named_buff_nextkey(rx, flags);
- else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_iter", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_fetch(pTHX_ REGEXP * const r, SV * const namesv,
- const U32 flags)
-{
- AV *retarray = NULL;
- SV *ret;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FETCH;
-
- if (flags & RXapif_ALL)
- retarray=newAV();
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HE *he_str = hv_fetch_ent( RXp_PAREN_NAMES(rx), namesv, 0, 0 );
- if (he_str) {
- IV i;
- SV* sv_dat=HeVAL(he_str);
- I32 *nums=(I32*)SvPVX(sv_dat);
- for ( i=0; i<SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->nparens) >= nums[i]
- && rx->offs[nums[i]].start != -1
- && rx->offs[nums[i]].end != -1)
- {
- ret = newSVpvs("");
- CALLREG_NUMBUF_FETCH(r,nums[i],ret);
- if (!retarray)
- return ret;
- } else {
- ret = newSVsv(&PL_sv_undef);
- }
- if (retarray)
- av_push(retarray, ret);
- }
- if (retarray)
- return newRV_noinc(MUTABLE_SV(retarray));
- }
- }
- return NULL;
-}
-
-bool
-Perl_reg_named_buff_exists(pTHX_ REGEXP * const r, SV * const key,
- const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_EXISTS;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & RXapif_ALL) {
- return hv_exists_ent(RXp_PAREN_NAMES(rx), key, 0);
- } else {
- SV *sv = CALLREG_NAMED_BUFF_FETCH(r, key, flags);
- if (sv) {
- SvREFCNT_dec(sv);
- return TRUE;
- } else {
- return FALSE;
- }
- }
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_firstkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FIRSTKEY;
-
- if ( rx && RXp_PAREN_NAMES(rx) ) {
- (void)hv_iterinit(RXp_PAREN_NAMES(rx));
-
- return CALLREG_NAMED_BUFF_NEXTKEY(r, NULL, flags & ~RXapif_FIRSTKEY);
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_nextkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_NEXTKEY;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv = RXp_PAREN_NAMES(rx);
- HE *temphe;
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- return newSVhek(HeKEY_hek(temphe));
- }
- }
- }
- return NULL;
-}
-
-SV*
-Perl_reg_named_buff_scalar(pTHX_ REGEXP * const r, const U32 flags)
-{
- SV *ret;
- AV *av;
- I32 length;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_SCALAR;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & (RXapif_ALL | RXapif_REGNAMES_COUNT)) {
- return newSViv(HvTOTALKEYS(RXp_PAREN_NAMES(rx)));
- } else if (flags & RXapif_ONE) {
- ret = CALLREG_NAMED_BUFF_ALL(r, (flags | RXapif_REGNAMES));
- av = MUTABLE_AV(SvRV(ret));
- length = av_len(av);
- SvREFCNT_dec(ret);
- return newSViv(length + 1);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_scalar", (int)flags);
- return NULL;
- }
- }
- return &PL_sv_undef;
-}
-
-SV*
-Perl_reg_named_buff_all(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- AV *av = newAV();
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ALL;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv= RXp_PAREN_NAMES(rx);
- HE *temphe;
- (void)hv_iterinit(hv);
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- av_push(av, newSVhek(HeKEY_hek(temphe)));
- }
- }
- }
-
- return newRV_noinc(MUTABLE_SV(av));
-}
-
-void
-Perl_reg_numbered_buff_fetch(pTHX_ REGEXP * const r, const I32 paren,
- SV * const sv)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- char *s = NULL;
- I32 i = 0;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_FETCH;
-
- if (!rx->subbeg) {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- else
- if (paren == RX_BUFF_IDX_PREMATCH && rx->offs[0].start != -1) {
- /* $` */
- i = rx->offs[0].start;
- s = rx->subbeg;
- }
- else
- if (paren == RX_BUFF_IDX_POSTMATCH && rx->offs[0].end != -1) {
- /* $' */
- s = rx->subbeg + rx->offs[0].end;
- i = rx->sublen - rx->offs[0].end;
- }
- else
- if ( 0 <= paren && paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- /* $& $1 ... */
- i = t1 - s1;
- s = rx->subbeg + s1;
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- assert(rx->sublen >= (s - rx->subbeg) + i );
- if (i >= 0) {
- const int oldtainted = PL_tainted;
- TAINT_NOT;
- sv_setpvn(sv, s, i);
- PL_tainted = oldtainted;
- if ( (rx->extflags & RXf_CANY_SEEN)
- ? (RXp_MATCH_UTF8(rx)
- && (!i || is_utf8_string((U8*)s, i)))
- : (RXp_MATCH_UTF8(rx)) )
- {
- SvUTF8_on(sv);
- }
- else
- SvUTF8_off(sv);
- if (PL_tainting) {
- if (RXp_MATCH_TAINTED(rx)) {
- if (SvTYPE(sv) >= SVt_PVMG) {
- MAGIC* const mg = SvMAGIC(sv);
- MAGIC* mgt;
- PL_tainted = 1;
- SvMAGIC_set(sv, mg->mg_moremagic);
- SvTAINT(sv);
- if ((mgt = SvMAGIC(sv))) {
- mg->mg_moremagic = mgt;
- SvMAGIC_set(sv, mg);
- }
- } else {
- PL_tainted = 1;
- SvTAINT(sv);
- }
- } else
- SvTAINTED_off(sv);
- }
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
-}
-
-void
-Perl_reg_numbered_buff_store(pTHX_ REGEXP * const rx, const I32 paren,
- SV const * const value)
-{
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_STORE;
-
- PERL_UNUSED_ARG(rx);
- PERL_UNUSED_ARG(paren);
- PERL_UNUSED_ARG(value);
-
- if (!PL_localizing)
- Perl_croak(aTHX_ "%s", PL_no_modify);
-}
-
-I32
-Perl_reg_numbered_buff_length(pTHX_ REGEXP * const r, const SV * const sv,
- const I32 paren)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- I32 i;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_LENGTH;
-
- /* Some of this code was originally in C<Perl_magic_len> in F<mg.c> */
- switch (paren) {
- /* $` / ${^PREMATCH} */
- case RX_BUFF_IDX_PREMATCH:
- if (rx->offs[0].start != -1) {
- i = rx->offs[0].start;
- if (i > 0) {
- s1 = 0;
- t1 = i;
- goto getlen;
- }
- }
- return 0;
- /* $' / ${^POSTMATCH} */
- case RX_BUFF_IDX_POSTMATCH:
- if (rx->offs[0].end != -1) {
- i = rx->sublen - rx->offs[0].end;
- if (i > 0) {
- s1 = rx->offs[0].end;
- t1 = rx->sublen;
- goto getlen;
- }
- }
- return 0;
- /* $& / ${^MATCH}, $1, $2, ... */
- default:
- if (paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- i = t1 - s1;
- goto getlen;
- } else {
- if (ckWARN(WARN_UNINITIALIZED))
- report_uninit((const SV *)sv);
- return 0;
- }
- }
- getlen:
- if (i > 0 && RXp_MATCH_UTF8(rx)) {
- const char * const s = rx->subbeg + s1;
- const U8 *ep;
- STRLEN el;
-
- i = t1 - s1;
- if (is_utf8_string_loclen((U8*)s, i, &ep, &el))
- i = el;
- }
- return i;
-}
-
-SV*
-Perl_reg_qr_package(pTHX_ REGEXP * const rx)
-{
- PERL_ARGS_ASSERT_REG_QR_PACKAGE;
- PERL_UNUSED_ARG(rx);
- if (0)
- return NULL;
- else
- return newSVpvs("Regexp");
-}
-
-/* Scans the name of a named buffer from the pattern.
- * If flags is REG_RSN_RETURN_NULL returns null.
- * If flags is REG_RSN_RETURN_NAME returns an SV* containing the name
- * If flags is REG_RSN_RETURN_DATA returns the data SV* corresponding
- * to the parsed name as looked up in the RExC_paren_names hash.
- * If there is an error throws a vFAIL().. type exception.
- */
-
-#define REG_RSN_RETURN_NULL 0
-#define REG_RSN_RETURN_NAME 1
-#define REG_RSN_RETURN_DATA 2
-
-STATIC SV*
-S_reg_scan_name(pTHX_ RExC_state_t *pRExC_state, U32 flags)
-{
- char *name_start = RExC_parse;
-
- PERL_ARGS_ASSERT_REG_SCAN_NAME;
-
- if (isIDFIRST_lazy_if(RExC_parse, UTF)) {
- /* skip IDFIRST by using do...while */
- if (UTF)
- do {
- RExC_parse += UTF8SKIP(RExC_parse);
- } while (isALNUM_utf8((U8*)RExC_parse));
- else
- do {
- RExC_parse++;
- } while (isALNUM(*RExC_parse));
- }
-
- if ( flags ) {
- SV* sv_name
- = newSVpvn_flags(name_start, (int)(RExC_parse - name_start),
- SVs_TEMP | (UTF ? SVf_UTF8 : 0));
- if ( flags == REG_RSN_RETURN_NAME)
- return sv_name;
- else if (flags==REG_RSN_RETURN_DATA) {
- HE *he_str = NULL;
- SV *sv_dat = NULL;
- if ( ! sv_name ) /* should not happen*/
- Perl_croak(aTHX_ "panic: no svname in reg_scan_name");
- if (RExC_paren_names)
- he_str = hv_fetch_ent( RExC_paren_names, sv_name, 0, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat )
- vFAIL("Reference to nonexistent named group");
- return sv_dat;
- }
- else {
- Perl_croak(aTHX_ "panic: bad flag in reg_scan_name");
- }
- /* NOT REACHED */
- }
- return NULL;
-}
-
-#define DEBUG_PARSE_MSG(funcname) DEBUG_PARSE_r({ \
- int rem=(int)(RExC_end - RExC_parse); \
- int cut; \
- int num; \
- int iscut=0; \
- if (rem>10) { \
- rem=10; \
- iscut=1; \
- } \
- cut=10-rem; \
- if (RExC_lastparse!=RExC_parse) \
- PerlIO_printf(Perl_debug_log," >%.*s%-*s", \
- rem, RExC_parse, \
- cut + 4, \
- iscut ? "..." : "<" \
- ); \
- else \
- PerlIO_printf(Perl_debug_log,"%16s",""); \
- \
- if (SIZE_ONLY) \
- num = RExC_size + 1; \
- else \
- num=REG_NODE_NUM(RExC_emit); \
- if (RExC_lastnum!=num) \
- PerlIO_printf(Perl_debug_log,"|%4d",num); \
- else \
- PerlIO_printf(Perl_debug_log,"|%4s",""); \
- PerlIO_printf(Perl_debug_log,"|%*s%-4s", \
- (int)((depth*2)), "", \
- (funcname) \
- ); \
- RExC_lastnum=num; \
- RExC_lastparse=RExC_parse; \
-})
-
-
-
-#define DEBUG_PARSE(funcname) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,"%4s","\n"); \
-})
-#define DEBUG_PARSE_FMT(funcname,fmt,args) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,fmt "\n",args); \
-})
-/*
- - reg - regular expression, i.e. main body or parenthesized thing
- *
- * Caller must absorb opening parenthesis.
- *
- * Combining parenthesis handling with the base level of regular expression
- * is a trifle forced, but the need to tie the tails of the branches to what
- * follows makes it hard to avoid.
- */
-#define REGTAIL(x,y,z) regtail((x),(y),(z),depth+1)
-#ifdef DEBUGGING
-#define REGTAIL_STUDY(x,y,z) regtail_study((x),(y),(z),depth+1)
-#else
-#define REGTAIL_STUDY(x,y,z) regtail((x),(y),(z),depth+1)
-#endif
-
-STATIC regnode *
-S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth)
- /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */
-{
- dVAR;
- register regnode *ret; /* Will be the head of the group. */
- register regnode *br;
- register regnode *lastbr;
- register regnode *ender = NULL;
- register I32 parno = 0;
- I32 flags;
- U32 oregflags = RExC_flags;
- bool have_branch = 0;
- bool is_open = 0;
- I32 freeze_paren = 0;
- I32 after_freeze = 0;
-
- /* for (?g), (?gc), and (?o) warnings; warning
- about (?c) will warn about (?g) -- japhy */
-
-#define WASTED_O 0x01
-#define WASTED_G 0x02
-#define WASTED_C 0x04
-#define WASTED_GC (0x02|0x04)
- I32 wastedflags = 0x00;
-
- char * parse_start = RExC_parse; /* MJD */
- char * const oregcomp_parse = RExC_parse;
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG;
- DEBUG_PARSE("reg ");
-
- *flagp = 0; /* Tentatively. */
-
-
- /* Make an OPEN node, if parenthesized. */
- if (paren) {
- if ( *RExC_parse == '*') { /* (*VERB:ARG) */
- char *start_verb = RExC_parse;
- STRLEN verb_len = 0;
- char *start_arg = NULL;
- unsigned char op = 0;
- int argok = 1;
- int internal_argval = 0; /* internal_argval is only useful if !argok */
- while ( *RExC_parse && *RExC_parse != ')' ) {
- if ( *RExC_parse == ':' ) {
- start_arg = RExC_parse + 1;
- break;
- }
- RExC_parse++;
- }
- ++start_verb;
- verb_len = RExC_parse - start_verb;
- if ( start_arg ) {
- RExC_parse++;
- while ( *RExC_parse && *RExC_parse != ')' )
- RExC_parse++;
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern argument");
- if ( RExC_parse == start_arg )
- start_arg = NULL;
- } else {
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern");
- }
-
- switch ( *start_verb ) {
- case 'A': /* (*ACCEPT) */
- if ( memEQs(start_verb,verb_len,"ACCEPT") ) {
- op = ACCEPT;
- internal_argval = RExC_nestroot;
- }
- break;
- case 'C': /* (*COMMIT) */
- if ( memEQs(start_verb,verb_len,"COMMIT") )
- op = COMMIT;
- break;
- case 'F': /* (*FAIL) */
- if ( verb_len==1 || memEQs(start_verb,verb_len,"FAIL") ) {
- op = OPFAIL;
- argok = 0;
- }
- break;
- case ':': /* (*:NAME) */
- case 'M': /* (*MARK:NAME) */
- if ( verb_len==0 || memEQs(start_verb,verb_len,"MARK") ) {
- op = MARKPOINT;
- argok = -1;
- }
- break;
- case 'P': /* (*PRUNE) */
- if ( memEQs(start_verb,verb_len,"PRUNE") )
- op = PRUNE;
- break;
- case 'S': /* (*SKIP) */
- if ( memEQs(start_verb,verb_len,"SKIP") )
- op = SKIP;
- break;
- case 'T': /* (*THEN) */
- /* [19:06] <TimToady> :: is then */
- if ( memEQs(start_verb,verb_len,"THEN") ) {
- op = CUTGROUP;
- RExC_seen |= REG_SEEN_CUTGROUP;
- }
- break;
- }
- if ( ! op ) {
- RExC_parse++;
- vFAIL3("Unknown verb pattern '%.*s'",
- verb_len, start_verb);
- }
- if ( argok ) {
- if ( start_arg && internal_argval ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else if ( argok < 0 && !start_arg ) {
- vFAIL3("Verb pattern '%.*s' has a mandatory argument",
- verb_len, start_verb);
- } else {
- ret = reganode(pRExC_state, op, internal_argval);
- if ( ! internal_argval && ! SIZE_ONLY ) {
- if (start_arg) {
- SV *sv = newSVpvn( start_arg, RExC_parse - start_arg);
- ARG(ret) = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[ARG(ret)]=(void*)sv;
- ret->flags = 0;
- } else {
- ret->flags = 1;
- }
- }
- }
- if (!internal_argval)
- RExC_seen |= REG_SEEN_VERBARG;
- } else if ( start_arg ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else {
- ret = reg_node(pRExC_state, op);
- }
- nextchar(pRExC_state);
- return ret;
- } else
- if (*RExC_parse == '?') { /* (?...) */
- bool is_logical = 0;
- const char * const seqstart = RExC_parse;
-
- RExC_parse++;
- paren = *RExC_parse++;
- ret = NULL; /* For look-ahead/behind. */
- switch (paren) {
-
- case 'P': /* (?P...) variants for those used to PCRE/Python */
- paren = *RExC_parse++;
- if ( paren == '<') /* (?P<...>) named capture */
- goto named_capture;
- else if (paren == '>') { /* (?P>name) named recursion */
- goto named_recursion;
- }
- else if (paren == '=') { /* (?P=...) named backref */
- /* this pretty much dupes the code for \k<NAME> in regatom(), if
- you change this make sure you change that */
- char* name_start = RExC_parse;
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ')')
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
-
- nextchar(pRExC_state);
- return ret;
- }
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- case '<': /* (?<...) */
- if (*RExC_parse == '!')
- paren = ',';
- else if (*RExC_parse != '=')
- named_capture:
- { /* (?<...>) */
- char *name_start;
- SV *svname;
- paren= '>';
- case '\'': /* (?'...') */
- name_start= RExC_parse;
- svname = reg_scan_name(pRExC_state,
- SIZE_ONLY ? /* reverse test from the others */
- REG_RSN_RETURN_NAME :
- REG_RSN_RETURN_NULL);
- if (RExC_parse == name_start) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- if (*RExC_parse != paren)
- vFAIL2("Sequence (?%c... not terminated",
- paren=='>' ? '<' : paren);
- if (SIZE_ONLY) {
- HE *he_str;
- SV *sv_dat = NULL;
- if (!svname) /* shouldnt happen */
- Perl_croak(aTHX_
- "panic: reg_scan_name returned NULL");
- if (!RExC_paren_names) {
- RExC_paren_names= newHV();
- sv_2mortal(MUTABLE_SV(RExC_paren_names));
-#ifdef DEBUGGING
- RExC_paren_name_list= newAV();
- sv_2mortal(MUTABLE_SV(RExC_paren_name_list));
-#endif
- }
- he_str = hv_fetch_ent( RExC_paren_names, svname, 1, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat ) {
- /* croak baby croak */
- Perl_croak(aTHX_
- "panic: paren_name hash element allocation failed");
- } else if ( SvPOK(sv_dat) ) {
- /* (?|...) can mean we have dupes so scan to check
- its already been stored. Maybe a flag indicating
- we are inside such a construct would be useful,
- but the arrays are likely to be quite small, so
- for now we punt -- dmq */
- IV count = SvIV(sv_dat);
- I32 *pv = (I32*)SvPVX(sv_dat);
- IV i;
- for ( i = 0 ; i < count ; i++ ) {
- if ( pv[i] == RExC_npar ) {
- count = 0;
- break;
- }
- }
- if ( count ) {
- pv = (I32*)SvGROW(sv_dat, SvCUR(sv_dat) + sizeof(I32)+1);
- SvCUR_set(sv_dat, SvCUR(sv_dat) + sizeof(I32));
- pv[count] = RExC_npar;
- SvIV_set(sv_dat, SvIVX(sv_dat) + 1);
- }
- } else {
- (void)SvUPGRADE(sv_dat,SVt_PVNV);
- sv_setpvn(sv_dat, (char *)&(RExC_npar), sizeof(I32));
- SvIOK_on(sv_dat);
- SvIV_set(sv_dat, 1);
- }
-#ifdef DEBUGGING
- if (!av_store(RExC_paren_name_list, RExC_npar, SvREFCNT_inc(svname)))
- SvREFCNT_dec(svname);
-#endif
-
- /*sv_dump(sv_dat);*/
- }
- nextchar(pRExC_state);
- paren = 1;
- goto capturing_parens;
- }
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- RExC_parse++;
- case '=': /* (?=...) */
- RExC_seen_zerolen++;
- break;
- case '!': /* (?!...) */
- RExC_seen_zerolen++;
- if (*RExC_parse == ')') {
- ret=reg_node(pRExC_state, OPFAIL);
- nextchar(pRExC_state);
- return ret;
- }
- break;
- case '|': /* (?|...) */
- /* branch reset, behave like a (?:...) except that
- buffers in alternations share the same numbers */
- paren = ':';
- after_freeze = freeze_paren = RExC_npar;
- break;
- case ':': /* (?:...) */
- case '>': /* (?>...) */
- break;
- case '$': /* (?$...) */
- case '@': /* (?@...) */
- vFAIL2("Sequence (?%c...) not implemented", (int)paren);
- break;
- case '#': /* (?#...) */
- while (*RExC_parse && *RExC_parse != ')')
- RExC_parse++;
- if (*RExC_parse != ')')
- FAIL("Sequence (?#... not terminated");
- nextchar(pRExC_state);
- *flagp = TRYAGAIN;
- return NULL;
- case '0' : /* (?0) */
- case 'R' : /* (?R) */
- if (*RExC_parse != ')')
- FAIL("Sequence (?R) not terminated");
- ret = reg_node(pRExC_state, GOSTART);
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- /*notreached*/
- { /* named and numeric backreferences */
- I32 num;
- case '&': /* (?&NAME) */
- parse_start = RExC_parse - 1;
- named_recursion:
- {
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- num = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- goto gen_recurse_regop;
- /* NOT REACHED */
- case '+':
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse++;
- vFAIL("Illegal pattern");
- }
- goto parse_recursion;
- /* NOT REACHED*/
- case '-': /* (?-1) */
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse--; /* rewind to let it be handled later */
- goto parse_flags;
- }
- /*FALLTHROUGH */
- case '1': case '2': case '3': case '4': /* (?1) */
- case '5': case '6': case '7': case '8': case '9':
- RExC_parse--;
- parse_recursion:
- num = atoi(RExC_parse);
- parse_start = RExC_parse - 1; /* MJD */
- if (*RExC_parse == '-')
- RExC_parse++;
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (*RExC_parse!=')')
- vFAIL("Expecting close bracket");
-
- gen_recurse_regop:
- if ( paren == '-' ) {
- /*
- Diagram of capture buffer numbering.
- Top line is the normal capture buffer numbers
- Botton line is the negative indexing as from
- the X (the (?-2))
-
- + 1 2 3 4 5 X 6 7
- /(a(x)y)(a(b(c(?-2)d)e)f)(g(h))/
- - 5 4 3 2 1 X x x
-
- */
- num = RExC_npar + num;
- if (num < 1) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- } else if ( paren == '+' ) {
- num = RExC_npar + num - 1;
- }
-
- ret = reganode(pRExC_state, GOSUB, num);
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- ARG2L_SET( ret, RExC_recurse_count++);
- RExC_emit++;
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Recurse #%"UVuf" to %"IVdf"\n", (UV)ARG(ret), (IV)ARG2L(ret)));
- } else {
- RExC_size++;
- }
- RExC_seen |= REG_SEEN_RECURSE;
- Set_Node_Length(ret, 1 + regarglen[OP(ret)]); /* MJD */
- Set_Node_Offset(ret, parse_start); /* MJD */
-
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- } /* named and numeric backreferences */
- /* NOT REACHED */
-
- case '?': /* (??...) */
- is_logical = 1;
- if (*RExC_parse != '{') {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- *flagp |= POSTPONED;
- paren = *RExC_parse++;
- /* FALL THROUGH */
- case '{': /* (?{...}) */
- {
- I32 count = 1;
- U32 n = 0;
- char c;
- char *s = RExC_parse;
-
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_EVAL;
- while (count && (c = *RExC_parse)) {
- if (c == '\\') {
- if (RExC_parse[1])
- RExC_parse++;
- }
- else if (c == '{')
- count++;
- else if (c == '}')
- count--;
- RExC_parse++;
- }
- if (*RExC_parse != ')') {
- RExC_parse = s;
- vFAIL("Sequence (?{...}) not terminated or not {}-balanced");
- }
- if (!SIZE_ONLY) {
- PAD *pad;
- OP_4tree *sop, *rop;
- SV * const sv = newSVpvn(s, RExC_parse - 1 - s);
-
- ENTER;
- Perl_save_re_context(aTHX);
- rop = sv_compile_2op(sv, &sop, "re", &pad);
- sop->op_private |= OPpREFCOUNTED;
- /* re_dup will OpREFCNT_inc */
- OpREFCNT_set(sop, 1);
- LEAVE;
-
- n = add_data(pRExC_state, 3, "nop");
- RExC_rxi->data->data[n] = (void*)rop;
- RExC_rxi->data->data[n+1] = (void*)sop;
- RExC_rxi->data->data[n+2] = (void*)pad;
- SvREFCNT_dec(sv);
- }
- else { /* First pass */
- if (PL_reginterp_cnt < ++RExC_seen_evals
- && IN_PERL_RUNTIME)
- /* No compiled RE interpolated, has runtime
- components ===> unsafe. */
- FAIL("Eval-group not allowed at runtime, use re 'eval'");
- if (PL_tainting && PL_tainted)
- FAIL("Eval-group in insecure regular expression");
-#if PERL_VERSION > 8
- if (IN_PERL_COMPILETIME)
- PL_cv_has_eval = 1;
-#endif
- }
-
- nextchar(pRExC_state);
- if (is_logical) {
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 2;
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, EVAL, n));
- /* deal with the length of this later - MJD */
- return ret;
- }
- ret = reganode(pRExC_state, EVAL, n);
- Set_Node_Length(ret, RExC_parse - parse_start + 1);
- Set_Node_Offset(ret, parse_start);
- return ret;
- }
- case '(': /* (?(?{...})...) and (?(?=...)...) */
- {
- int is_define= 0;
- if (RExC_parse[0] == '?') { /* (?(?...)) */
- if (RExC_parse[1] == '=' || RExC_parse[1] == '!'
- || RExC_parse[1] == '<'
- || RExC_parse[1] == '{') { /* Lookahead or eval. */
- I32 flag;
-
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 1;
- REGTAIL(pRExC_state, ret, reg(pRExC_state, 1, &flag,depth+1));
- goto insert_if;
- }
- }
- else if ( RExC_parse[0] == '<' /* (?(<NAME>)...) */
- || RExC_parse[0] == '\'' ) /* (?('NAME')...) */
- {
- char ch = RExC_parse[0] == '<' ? '>' : '\'';
- char *name_start= RExC_parse++;
- U32 num = 0;
- SV *sv_dat=reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence (?(%c... not terminated",
- (ch == '>' ? '<' : ch));
- RExC_parse++;
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- ret = reganode(pRExC_state,NGROUPP,num);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'D' &&
- RExC_parse[1] == 'E' &&
- RExC_parse[2] == 'F' &&
- RExC_parse[3] == 'I' &&
- RExC_parse[4] == 'N' &&
- RExC_parse[5] == 'E')
- {
- ret = reganode(pRExC_state,DEFINEP,0);
- RExC_parse +=6 ;
- is_define = 1;
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'R') {
- RExC_parse++;
- parno = 0;
- if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- parno = atoi(RExC_parse++);
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- } else if (RExC_parse[0] == '&') {
- SV *sv_dat;
- RExC_parse++;
- sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- parno = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- ret = reganode(pRExC_state,INSUBP,parno);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- /* (?(1)...) */
- char c;
- parno = atoi(RExC_parse++);
-
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- ret = reganode(pRExC_state, GROUPP, parno);
-
- insert_if_check_paren:
- if ((c = *nextchar(pRExC_state)) != ')')
- vFAIL("Switch condition not recognized");
- insert_if:
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0));
- br = regbranch(pRExC_state, &flags, 1,depth+1);
- if (br == NULL)
- br = reganode(pRExC_state, LONGJMP, 0);
- else
- REGTAIL(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0));
- c = *nextchar(pRExC_state);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- if (c == '|') {
- if (is_define)
- vFAIL("(?(DEFINE)....) does not allow branches");
- lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */
- regbranch(pRExC_state, &flags, 1,depth+1);
- REGTAIL(pRExC_state, ret, lastbr);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- c = *nextchar(pRExC_state);
- }
- else
- lastbr = NULL;
- if (c != ')')
- vFAIL("Switch (?(condition)... contains too many branches");
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, br, ender);
- if (lastbr) {
- REGTAIL(pRExC_state, lastbr, ender);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender);
- }
- else
- REGTAIL(pRExC_state, ret, ender);
- RExC_size++; /* XXX WHY do we need this?!!
- For large programs it seems to be required
- but I can't figure out why. -- dmq*/
- return ret;
- }
- else {
- vFAIL2("Unknown switch condition (?(%.2s", RExC_parse);
- }
- }
- case 0:
- RExC_parse--; /* for vFAIL to print correctly */
- vFAIL("Sequence (? incomplete");
- break;
- default:
- --RExC_parse;
- parse_flags: /* (?i) */
- {
- U32 posflags = 0, negflags = 0;
- U32 *flagsp = &posflags;
-
- while (*RExC_parse) {
- /* && strchr("iogcmsx", *RExC_parse) */
- /* (?g), (?gc) and (?o) are useless here
- and must be globally applied -- japhy */
- switch (*RExC_parse) {
- CASE_STD_PMMOD_FLAGS_PARSE_SET(flagsp);
- case ONCE_PAT_MOD: /* 'o' */
- case GLOBAL_PAT_MOD: /* 'g' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- const I32 wflagbit = *RExC_parse == 'o' ? WASTED_O : WASTED_G;
- if (! (wastedflags & wflagbit) ) {
- wastedflags |= wflagbit;
- vWARN5(
- RExC_parse + 1,
- "Useless (%s%c) - %suse /%c modifier",
- flagsp == &negflags ? "?-" : "?",
- *RExC_parse,
- flagsp == &negflags ? "don't " : "",
- *RExC_parse
- );
- }
- }
- break;
-
- case CONTINUE_PAT_MOD: /* 'c' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- if (! (wastedflags & WASTED_C) ) {
- wastedflags |= WASTED_GC;
- vWARN3(
- RExC_parse + 1,
- "Useless (%sc) - %suse /gc modifier",
- flagsp == &negflags ? "?-" : "?",
- flagsp == &negflags ? "don't " : ""
- );
- }
- }
- break;
- case KEEPCOPY_PAT_MOD: /* 'p' */
- if (flagsp == &negflags) {
- if (SIZE_ONLY)
- ckWARNreg(RExC_parse + 1,"Useless use of (?-p)");
- } else {
- *flagsp |= RXf_PMf_KEEPCOPY;
- }
- break;
- case '-':
- if (flagsp == &negflags) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- flagsp = &negflags;
- wastedflags = 0; /* reset so (?g-c) warns twice */
- break;
- case ':':
- paren = ':';
- /*FALLTHROUGH*/
- case ')':
- RExC_flags |= posflags;
- RExC_flags &= ~negflags;
- if (paren != ':') {
- oregflags |= posflags;
- oregflags &= ~negflags;
- }
- nextchar(pRExC_state);
- if (paren != ':') {
- *flagp = TRYAGAIN;
- return NULL;
- } else {
- ret = NULL;
- goto parse_rest;
- }
- /*NOTREACHED*/
- default:
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- ++RExC_parse;
- }
- }} /* one for the default block, one for the switch */
- }
- else { /* (...) */
- capturing_parens:
- parno = RExC_npar;
- RExC_npar++;
-
- ret = reganode(pRExC_state, OPEN, parno);
- if (!SIZE_ONLY ){
- if (!RExC_nestroot)
- RExC_nestroot = parno;
- if (RExC_seen & REG_SEEN_RECURSE
- && !RExC_open_parens[parno-1])
- {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting open paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ret)));
- RExC_open_parens[parno-1]= ret;
- }
- }
- Set_Node_Length(ret, 1); /* MJD */
- Set_Node_Offset(ret, RExC_parse); /* MJD */
- is_open = 1;
- }
- }
- else /* ! paren */
- ret = NULL;
-
- parse_rest:
- /* Pick up the branches, linking them together. */
- parse_start = RExC_parse; /* MJD */
- br = regbranch(pRExC_state, &flags, 1,depth+1);
-
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
-
- /* branch_len = (paren != 0); */
-
- if (br == NULL)
- return(NULL);
- if (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, BRANCHJ, br, depth+1);
- }
- else { /* MJD */
- reginsert(pRExC_state, BRANCH, br, depth+1);
- Set_Node_Length(br, paren != 0);
- Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start);
- }
- have_branch = 1;
- if (SIZE_ONLY)
- RExC_extralen += 1; /* For BRANCHJ-BRANCH. */
- }
- else if (paren == ':') {
- *flagp |= flags&SIMPLE;
- }
- if (is_open) { /* Starts with OPEN. */
- REGTAIL(pRExC_state, ret, br); /* OPEN -> first. */
- }
- else if (paren != '?') /* Not Conditional */
- ret = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- lastbr = br;
- while (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- ender = reganode(pRExC_state, LONGJMP,0);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */
- }
- if (SIZE_ONLY)
- RExC_extralen += 2; /* Account for LONGJMP. */
- nextchar(pRExC_state);
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
- br = regbranch(pRExC_state, &flags, 0, depth+1);
-
- if (br == NULL)
- return(NULL);
- REGTAIL(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */
- lastbr = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- }
-
- if (have_branch || paren != ':') {
- /* Make a closing node, and hook it on the end. */
- switch (paren) {
- case ':':
- ender = reg_node(pRExC_state, TAIL);
- break;
- case 1:
- ender = reganode(pRExC_state, CLOSE, parno);
- if (!SIZE_ONLY && RExC_seen & REG_SEEN_RECURSE) {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting close paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ender)));
- RExC_close_parens[parno-1]= ender;
- if (RExC_nestroot == parno)
- RExC_nestroot = 0;
- }
- Set_Node_Offset(ender,RExC_parse+1); /* MJD */
- Set_Node_Length(ender,1); /* MJD */
- break;
- case '<':
- case ',':
- case '=':
- case '!':
- *flagp &= ~HASWIDTH;
- /* FALL THROUGH */
- case '>':
- ender = reg_node(pRExC_state, SUCCEED);
- break;
- case 0:
- ender = reg_node(pRExC_state, END);
- if (!SIZE_ONLY) {
- assert(!RExC_opend); /* there can only be one! */
- RExC_opend = ender;
- }
- break;
- }
- REGTAIL(pRExC_state, lastbr, ender);
-
- if (have_branch && !SIZE_ONLY) {
- if (depth==1)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
-
- /* Hook the tails of the branches to the closing node. */
- for (br = ret; br; br = regnext(br)) {
- const U8 op = PL_regkind[OP(br)];
- if (op == BRANCH) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(br), ender);
- }
- else if (op == BRANCHJ) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(NEXTOPER(br)), ender);
- }
- }
- }
- }
-
- {
- const char *p;
- static const char parens[] = "=!<,>";
-
- if (paren && (p = strchr(parens, paren))) {
- U8 node = ((p - parens) % 2) ? UNLESSM : IFMATCH;
- int flag = (p - parens) > 1;
-
- if (paren == '>')
- node = SUSPEND, flag = 0;
- reginsert(pRExC_state, node,ret, depth+1);
- Set_Node_Cur_Length(ret);
- Set_Node_Offset(ret, parse_start + 1);
- ret->flags = flag;
- REGTAIL_STUDY(pRExC_state, ret, reg_node(pRExC_state, TAIL));
- }
- }
-
- /* Check for proper termination. */
- if (paren) {
- RExC_flags = oregflags;
- if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched (");
- }
- }
- else if (!paren && RExC_parse < RExC_end) {
- if (*RExC_parse == ')') {
- RExC_parse++;
- vFAIL("Unmatched )");
- }
- else
- FAIL("Junk on end of regexp"); /* "Can't happen". */
- /* NOTREACHED */
- }
- if (after_freeze)
- RExC_npar = after_freeze;
- return(ret);
-}
-
-/*
- - regbranch - one alternative of an | operator
- *
- * Implements the concatenation operator.
- */
-STATIC regnode *
-S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register regnode *chain = NULL;
- register regnode *latest;
- I32 flags = 0, c = 0;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGBRANCH;
-
- DEBUG_PARSE("brnc");
-
- if (first)
- ret = NULL;
- else {
- if (!SIZE_ONLY && RExC_extralen)
- ret = reganode(pRExC_state, BRANCHJ,0);
- else {
- ret = reg_node(pRExC_state, BRANCH);
- Set_Node_Length(ret, 1);
- }
- }
-
- if (!first && SIZE_ONLY)
- RExC_extralen += 1; /* BRANCHJ */
-
- *flagp = WORST; /* Tentatively. */
-
- RExC_parse--;
- nextchar(pRExC_state);
- while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') {
- flags &= ~TRYAGAIN;
- latest = regpiece(pRExC_state, &flags,depth+1);
- if (latest == NULL) {
- if (flags & TRYAGAIN)
- continue;
- return(NULL);
- }
- else if (ret == NULL)
- ret = latest;
- *flagp |= flags&(HASWIDTH|POSTPONED);
- if (chain == NULL) /* First piece. */
- *flagp |= flags&SPSTART;
- else {
- RExC_naughty++;
- REGTAIL(pRExC_state, chain, latest);
- }
- chain = latest;
- c++;
- }
- if (chain == NULL) { /* Loop ran zero times. */
- chain = reg_node(pRExC_state, NOTHING);
- if (ret == NULL)
- ret = chain;
- }
- if (c == 1) {
- *flagp |= flags&SIMPLE;
- }
-
- return ret;
-}
-
-/*
- - regpiece - something followed by possible [*+?]
- *
- * Note that the branching code sequences used for ? and the general cases
- * of * and + are somewhat optimized: they use the same NOTHING node as
- * both the endmarker for their branch list and the body of the last branch.
- * It might seem that this node could be dispensed with entirely, but the
- * endmarker role is not redundant.
- */
-STATIC regnode *
-S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register char op;
- register char *next;
- I32 flags;
- const char * const origparse = RExC_parse;
- I32 min;
- I32 max = REG_INFTY;
- char *parse_start;
- const char *maxpos = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPIECE;
-
- DEBUG_PARSE("piec");
-
- ret = regatom(pRExC_state, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN)
- *flagp |= TRYAGAIN;
- return(NULL);
- }
-
- op = *RExC_parse;
-
- if (op == '{' && regcurly(RExC_parse)) {
- maxpos = NULL;
- parse_start = RExC_parse; /* MJD */
- next = RExC_parse + 1;
- while (isDIGIT(*next) || *next == ',') {
- if (*next == ',') {
- if (maxpos)
- break;
- else
- maxpos = next;
- }
- next++;
- }
- if (*next == '}') { /* got one */
- if (!maxpos)
- maxpos = next;
- RExC_parse++;
- min = atoi(RExC_parse);
- if (*maxpos == ',')
- maxpos++;
- else
- maxpos = RExC_parse;
- max = atoi(maxpos);
- if (!max && *maxpos != '0')
- max = REG_INFTY; /* meaning "infinity" */
- else if (max >= REG_INFTY)
- vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1);
- RExC_parse = next;
- nextchar(pRExC_state);
-
- do_curly:
- if ((flags&SIMPLE)) {
- RExC_naughty += 2 + RExC_naughty / 2;
- reginsert(pRExC_state, CURLY, ret, depth+1);
- Set_Node_Offset(ret, parse_start+1); /* MJD */
- Set_Node_Cur_Length(ret);
- }
- else {
- regnode * const w = reg_node(pRExC_state, WHILEM);
-
- w->flags = 0;
- REGTAIL(pRExC_state, ret, w);
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, LONGJMP,ret, depth+1);
- reginsert(pRExC_state, NOTHING,ret, depth+1);
- NEXT_OFF(ret) = 3; /* Go over LONGJMP. */
- }
- reginsert(pRExC_state, CURLYX,ret, depth+1);
- /* MJD hk */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Length(ret,
- op == '{' ? (RExC_parse - parse_start) : 1);
-
- if (!SIZE_ONLY && RExC_extralen)
- NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */
- REGTAIL(pRExC_state, ret, reg_node(pRExC_state, NOTHING));
- if (SIZE_ONLY)
- RExC_whilem_seen++, RExC_extralen += 3;
- RExC_naughty += 4 + RExC_naughty; /* compound interest */
- }
- ret->flags = 0;
-
- if (min > 0)
- *flagp = WORST;
- if (max > 0)
- *flagp |= HASWIDTH;
- if (max < min)
- vFAIL("Can't do {n,m} with n > m");
- if (!SIZE_ONLY) {
- ARG1_SET(ret, (U16)min);
- ARG2_SET(ret, (U16)max);
- }
-
- goto nest_check;
- }
- }
-
- if (!ISMULT1(op)) {
- *flagp = flags;
- return(ret);
- }
-
-#if 0 /* Now runtime fix should be reliable. */
-
- /* if this is reinstated, don't forget to put this back into perldiag:
-
- =item Regexp *+ operand could be empty at {#} in regex m/%s/
-
- (F) The part of the regexp subject to either the * or + quantifier
- could match an empty string. The {#} shows in the regular
- expression about where the problem was discovered.
-
- */
-
- if (!(flags&HASWIDTH) && op != '?')
- vFAIL("Regexp *+ operand could be empty");
-#endif
-
- parse_start = RExC_parse;
- nextchar(pRExC_state);
-
- *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH);
-
- if (op == '*' && (flags&SIMPLE)) {
- reginsert(pRExC_state, STAR, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 4;
- }
- else if (op == '*') {
- min = 0;
- goto do_curly;
- }
- else if (op == '+' && (flags&SIMPLE)) {
- reginsert(pRExC_state, PLUS, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 3;
- }
- else if (op == '+') {
- min = 1;
- goto do_curly;
- }
- else if (op == '?') {
- min = 0; max = 1;
- goto do_curly;
- }
- nest_check:
- if (!SIZE_ONLY && !(flags&(HASWIDTH|POSTPONED)) && max > REG_INFTY/3) {
- ckWARN3reg(RExC_parse,
- "%.*s matches null string many times",
- (int)(RExC_parse >= origparse ? RExC_parse - origparse : 0),
- origparse);
- }
-
- if (RExC_parse < RExC_end && *RExC_parse == '?') {
- nextchar(pRExC_state);
- reginsert(pRExC_state, MINMOD, ret, depth+1);
- REGTAIL(pRExC_state, ret, ret + NODE_STEP_REGNODE);
- }
-#ifndef REG_ALLOW_MINMOD_SUSPEND
- else
-#endif
- if (RExC_parse < RExC_end && *RExC_parse == '+') {
- regnode *ender;
- nextchar(pRExC_state);
- ender = reg_node(pRExC_state, SUCCEED);
- REGTAIL(pRExC_state, ret, ender);
- reginsert(pRExC_state, SUSPEND, ret, depth+1);
- ret->flags = 0;
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, ret, ender);
- /*ret= ender;*/
- }
-
- if (RExC_parse < RExC_end && ISMULT2(RExC_parse)) {
- RExC_parse++;
- vFAIL("Nested quantifiers");
- }
-
- return(ret);
-}
-
-
-/* reg_namedseq(pRExC_state,UVp)
-
- This is expected to be called by a parser routine that has
- recognized '\N' and needs to handle the rest. RExC_parse is
- expected to point at the first char following the N at the time
- of the call.
-
- If valuep is non-null then it is assumed that we are parsing inside
- of a charclass definition and the first codepoint in the resolved
- string is returned via *valuep and the routine will return NULL.
- In this mode if a multichar string is returned from the charnames
- handler a warning will be issued, and only the first char in the
- sequence will be examined. If the string returned is zero length
- then the value of *valuep is undefined and NON-NULL will
- be returned to indicate failure. (This will NOT be a valid pointer
- to a regnode.)
-
- If valuep is null then it is assumed that we are parsing normal text
- and inserts a new EXACT node into the program containing the resolved
- string and returns a pointer to the new node. If the string is
- zerolength a NOTHING node is emitted.
-
- On success RExC_parse is set to the char following the endbrace.
- Parsing failures will generate a fatal errorvia vFAIL(...)
-
- NOTE: We cache all results from the charnames handler locally in
- the RExC_charnames hash (created on first use) to prevent a charnames
- handler from playing silly-buggers and returning a short string and
- then a long string for a given pattern. Since the regexp program
- size is calculated during an initial parse this would result
- in a buffer overrun so we cache to prevent the charname result from
- changing during the course of the parse.
-
- */
-STATIC regnode *
-S_reg_namedseq(pTHX_ RExC_state_t *pRExC_state, UV *valuep, I32 *flagp)
-{
- char * name; /* start of the content of the name */
- char * endbrace; /* endbrace following the name */
- SV *sv_str = NULL;
- SV *sv_name = NULL;
- STRLEN len; /* this has various purposes throughout the code */
- bool cached = 0; /* if this is true then we shouldn't refcount dev sv_str */
- regnode *ret = NULL;
-
- PERL_ARGS_ASSERT_REG_NAMEDSEQ;
-
- if (*RExC_parse != '{' ||
- (*RExC_parse == '{' && RExC_parse[1]
- && strchr("0123456789", RExC_parse[1])))
- {
- GET_RE_DEBUG_FLAGS_DECL;
- if (valuep)
- /* no bare \N in a charclass */
- vFAIL("Missing braces on \\N{}");
- GET_RE_DEBUG_FLAGS;
- nextchar(pRExC_state);
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- RExC_parse--;
- Set_Node_Length(ret, 1); /* MJD */
- return ret;
- }
- name = RExC_parse+1;
- endbrace = strchr(RExC_parse, '}');
- if ( ! endbrace ) {
- RExC_parse++;
- vFAIL("Missing right brace on \\N{}");
- }
- RExC_parse = endbrace + 1;
-
-
- /* RExC_parse points at the beginning brace,
- endbrace points at the last */
- if ( name[0]=='U' && name[1]=='+' ) {
- /* its a "Unicode hex" notation {U+89AB} */
- I32 fl = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX
- | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0);
- UV cp;
- len = (STRLEN)(endbrace - name - 2);
- cp = grok_hex(name + 2, &len, &fl, NULL);
- if ( len != (STRLEN)(endbrace - name - 2) ) {
- cp = 0xFFFD;
- }
- if ( valuep ) {
- if (cp > 0xff) RExC_utf8 = 1;
- *valuep = cp;
- return NULL;
- }
-
- /* Need to convert to utf8 if either: won't fit into a byte, or the re
- * is going to be in utf8 and the representation changes under utf8. */
- if (cp > 0xff || (RExC_utf8 && ! UNI_IS_INVARIANT(cp))) {
- U8 string[UTF8_MAXBYTES+1];
- U8 *tmps;
- RExC_utf8 = 1;
- tmps = uvuni_to_utf8(string, cp);
- sv_str = newSVpvn_utf8((char*)string, tmps - string, TRUE);
- } else { /* Otherwise, no need for utf8, can skip that step */
- char string;
- string = (char)cp;
- sv_str= newSVpvn(&string, 1);
- }
- } else {
- /* fetch the charnames handler for this scope */
- HV * const table = GvHV(PL_hintgv);
- SV **cvp= table ?
- hv_fetchs(table, "charnames", FALSE) :
- NULL;
- SV *cv= cvp ? *cvp : NULL;
- HE *he_str;
- int count;
- /* create an SV with the name as argument */
- sv_name = newSVpvn(name, endbrace - name);
-
- if (!table || !(PL_hints & HINT_LOCALIZE_HH)) {
- vFAIL2("Constant(\\N{%" SVf "}) unknown: "
- "(possibly a missing \"use charnames ...\")",
- SVfARG(sv_name));
- }
- if (!cvp || !SvOK(*cvp)) { /* when $^H{charnames} = undef; */
- vFAIL2("Constant(\\N{%" SVf "}): "
- "$^H{charnames} is not defined", SVfARG(sv_name));
- }
-
-
-
- if (!RExC_charnames) {
- /* make sure our cache is allocated */
- RExC_charnames = newHV();
- sv_2mortal(MUTABLE_SV(RExC_charnames));
- }
- /* see if we have looked this one up before */
- he_str = hv_fetch_ent( RExC_charnames, sv_name, 0, 0 );
- if ( he_str ) {
- sv_str = HeVAL(he_str);
- cached = 1;
- } else {
- dSP ;
-
- ENTER ;
- SAVETMPS ;
- PUSHMARK(SP) ;
-
- XPUSHs(sv_name);
-
- PUTBACK ;
-
- count= call_sv(cv, G_SCALAR);
-
- if (count == 1) { /* XXXX is this right? dmq */
- sv_str = POPs;
- SvREFCNT_inc_simple_void(sv_str);
- }
-
- SPAGAIN ;
- PUTBACK ;
- FREETMPS ;
- LEAVE ;
-
- if ( !sv_str || !SvOK(sv_str) ) {
- vFAIL2("Constant(\\N{%" SVf "}): Call to &{$^H{charnames}} "
- "did not return a defined value", SVfARG(sv_name));
- }
- if (hv_store_ent( RExC_charnames, sv_name, sv_str, 0))
- cached = 1;
- }
- }
- if (valuep) {
- char *p = SvPV(sv_str, len);
- if (len) {
- STRLEN numlen = 1;
- if ( SvUTF8(sv_str) ) {
- *valuep = utf8_to_uvchr((U8*)p, &numlen);
- if (*valuep > 0x7F)
- RExC_utf8 = 1;
- /* XXXX
- We have to turn on utf8 for high bit chars otherwise
- we get failures with
-
- "ss" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
- "SS" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i
-
- This is different from what \x{} would do with the same
- codepoint, where the condition is > 0xFF.
- - dmq
- */
-
-
- } else {
- *valuep = (UV)*p;
- /* warn if we havent used the whole string? */
- }
- if (numlen<len && SIZE_ONLY) {
- ckWARN2reg(RExC_parse,
- "Ignoring excess chars from \\N{%" SVf "} in character class",
- SVfARG(sv_name)
- );
- }
- } else if (SIZE_ONLY) {
- ckWARN2reg(RExC_parse,
- "Ignoring zero length \\N{%" SVf "} in character class",
- SVfARG(sv_name)
- );
- }
- SvREFCNT_dec(sv_name);
- if (!cached)
- SvREFCNT_dec(sv_str);
- return len ? NULL : (regnode *)&len;
- } else if(SvCUR(sv_str)) {
-
- char *s;
- char *p, *pend;
- STRLEN charlen = 1;
-#ifdef DEBUGGING
- char * parse_start = name-3; /* needed for the offsets */
-#endif
- GET_RE_DEBUG_FLAGS_DECL; /* needed for the offsets */
-
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s= STRING(ret);
-
- if ( RExC_utf8 && !SvUTF8(sv_str) ) {
- sv_utf8_upgrade(sv_str);
- } else if ( !RExC_utf8 && SvUTF8(sv_str) ) {
- RExC_utf8= 1;
- }
-
- p = SvPV(sv_str, len);
- pend = p + len;
- /* len is the length written, charlen is the size the char read */
- for ( len = 0; p < pend; p += charlen ) {
- if (UTF) {
- UV uvc = utf8_to_uvchr((U8*)p, &charlen);
- if (FOLD) {
- STRLEN foldlen,numlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
- uvc = toFOLD_uni(uvc, tmpbuf, &foldlen);
- /* Emit all the Unicode characters. */
-
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen)
- {
- uvc = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- } else {
- const STRLEN unilen = reguni(pRExC_state, uvc, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- } else {
- len++;
- REGC(*p, s++);
- }
- }
- if (SIZE_ONLY) {
- RExC_size += STR_SZ(len);
- } else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- } else { /* zero length */
- ret = reg_node(pRExC_state,NOTHING);
- }
- SvREFCNT_dec(sv_name);
- if (!cached)
- SvREFCNT_dec(sv_str);
- return ret;
-
-}
-
-
-/*
- * reg_recode
- *
- * It returns the code point in utf8 for the value in *encp.
- * value: a code value in the source encoding
- * encp: a pointer to an Encode object
- *
- * If the result from Encode is not a single character,
- * it returns U+FFFD (Replacement character) and sets *encp to NULL.
- */
-STATIC UV
-S_reg_recode(pTHX_ const char value, SV **encp)
-{
- STRLEN numlen = 1;
- SV * const sv = newSVpvn_flags(&value, numlen, SVs_TEMP);
- const char * const s = *encp ? sv_recode_to_utf8(sv, *encp) : SvPVX(sv);
- const STRLEN newlen = SvCUR(sv);
- UV uv = UNICODE_REPLACEMENT;
-
- PERL_ARGS_ASSERT_REG_RECODE;
-
- if (newlen)
- uv = SvUTF8(sv)
- ? utf8n_to_uvchr((U8*)s, newlen, &numlen, UTF8_ALLOW_DEFAULT)
- : *(U8*)s;
-
- if (!newlen || numlen != newlen) {
- uv = UNICODE_REPLACEMENT;
- *encp = NULL;
- }
- return uv;
-}
-
-
-/*
- - regatom - the lowest level
-
- Try to identify anything special at the start of the pattern. If there
- is, then handle it as required. This may involve generating a single regop,
- such as for an assertion; or it may involve recursing, such as to
- handle a () structure.
-
- If the string doesn't start with something special then we gobble up
- as much literal text as we can.
-
- Once we have been able to handle whatever type of thing started the
- sequence, we return.
-
- Note: we have to be careful with escapes, as they can be both literal
- and special, and in the case of \10 and friends can either, depending
- on context. Specifically there are two seperate switches for handling
- escape sequences, with the one for handling literal escapes requiring
- a dummy entry for all of the special escapes that are actually handled
- by the other.
-*/
-
-STATIC regnode *
-S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret = NULL;
- I32 flags;
- char *parse_start = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_PARSE("atom");
- *flagp = WORST; /* Tentatively. */
-
- PERL_ARGS_ASSERT_REGATOM;
-
-tryagain:
- switch ((U8)*RExC_parse) {
- case '^':
- RExC_seen_zerolen++;
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MBOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SBOL);
- else
- ret = reg_node(pRExC_state, BOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '$':
- nextchar(pRExC_state);
- if (*RExC_parse)
- RExC_seen_zerolen++;
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MEOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SEOL);
- else
- ret = reg_node(pRExC_state, EOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '.':
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SANY);
- else
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '[':
- {
- char * const oregcomp_parse = ++RExC_parse;
- ret = regclass(pRExC_state,depth+1);
- if (*RExC_parse != ']') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched [");
- }
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */
- break;
- }
- case '(':
- nextchar(pRExC_state);
- ret = reg(pRExC_state, 1, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN) {
- if (RExC_parse == RExC_end) {
- /* Make parent create an empty node if needed. */
- *flagp |= TRYAGAIN;
- return(NULL);
- }
- goto tryagain;
- }
- return(NULL);
- }
- *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE|POSTPONED);
- break;
- case '|':
- case ')':
- if (flags & TRYAGAIN) {
- *flagp |= TRYAGAIN;
- return NULL;
- }
- vFAIL("Internal urp");
- /* Supposed to be caught earlier. */
- break;
- case '{':
- if (!regcurly(RExC_parse)) {
- RExC_parse++;
- goto defchar;
- }
- /* FALL THROUGH */
- case '?':
- case '+':
- case '*':
- RExC_parse++;
- vFAIL("Quantifier follows nothing");
- break;
- case 0xDF:
- case 0xC3:
- case 0xCE:
- do_foldchar:
- if (!LOC && FOLD) {
- U32 len,cp;
- len=0; /* silence a spurious compiler warning */
- if ((cp = what_len_TRICKYFOLD_safe(RExC_parse,RExC_end,UTF,len))) {
- *flagp |= HASWIDTH; /* could be SIMPLE too, but needs a handler in regexec.regrepeat */
- RExC_parse+=len-1; /* we get one from nextchar() as well. :-( */
- ret = reganode(pRExC_state, FOLDCHAR, cp);
- Set_Node_Length(ret, 1); /* MJD */
- nextchar(pRExC_state); /* kill whitespace under /x */
- return ret;
- }
- }
- goto outer_default;
- case '\\':
- /* Special Escapes
-
- This switch handles escape sequences that resolve to some kind
- of special regop and not to literal text. Escape sequnces that
- resolve to literal text are handled below in the switch marked
- "Literal Escapes".
-
- Every entry in this switch *must* have a corresponding entry
- in the literal escape switch. However, the opposite is not
- required, as the default for this switch is to jump to the
- literal text handling code.
- */
- switch ((U8)*++RExC_parse) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- goto do_foldchar;
- /* Special Escapes */
- case 'A':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, SBOL);
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'G':
- ret = reg_node(pRExC_state, GPOS);
- RExC_seen |= REG_SEEN_GPOS;
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'K':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, KEEPS);
- *flagp |= SIMPLE;
- /* XXX:dmq : disabling in-place substitution seems to
- * be necessary here to avoid cases of memory corruption, as
- * with: C<$_="x" x 80; s/x\K/y/> -- rgs
- */
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- goto finish_meta_pat;
- case 'Z':
- ret = reg_node(pRExC_state, SEOL);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'z':
- ret = reg_node(pRExC_state, EOS);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'C':
- ret = reg_node(pRExC_state, CANY);
- RExC_seen |= REG_SEEN_CANY;
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'X':
- ret = reg_node(pRExC_state, CLUMP);
- *flagp |= HASWIDTH;
- goto finish_meta_pat;
- case 'w':
- ret = reg_node(pRExC_state, (U8)(LOC ? ALNUML : ALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'W':
- ret = reg_node(pRExC_state, (U8)(LOC ? NALNUML : NALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'b':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? BOUNDL : BOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'B':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? NBOUNDL : NBOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 's':
- ret = reg_node(pRExC_state, (U8)(LOC ? SPACEL : SPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'S':
- ret = reg_node(pRExC_state, (U8)(LOC ? NSPACEL : NSPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'd':
- ret = reg_node(pRExC_state, DIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'D':
- ret = reg_node(pRExC_state, NDIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'R':
- ret = reg_node(pRExC_state, LNBREAK);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'h':
- ret = reg_node(pRExC_state, HORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'H':
- ret = reg_node(pRExC_state, NHORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'v':
- ret = reg_node(pRExC_state, VERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'V':
- ret = reg_node(pRExC_state, NVERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- finish_meta_pat:
- nextchar(pRExC_state);
- Set_Node_Length(ret, 2); /* MJD */
- break;
- case 'p':
- case 'P':
- {
- char* const oldregxend = RExC_end;
-#ifdef DEBUGGING
- char* parse_start = RExC_parse - 2;
-#endif
-
- if (RExC_parse[1] == '{') {
- /* a lovely hack--pretend we saw [\pX] instead */
- RExC_end = strchr(RExC_parse, '}');
- if (!RExC_end) {
- const U8 c = (U8)*RExC_parse;
- RExC_parse += 2;
- RExC_end = oldregxend;
- vFAIL2("Missing right brace on \\%c{}", c);
- }
- RExC_end++;
- }
- else {
- RExC_end = RExC_parse + 2;
- if (RExC_end > oldregxend)
- RExC_end = oldregxend;
- }
- RExC_parse--;
-
- ret = regclass(pRExC_state,depth+1);
-
- RExC_end = oldregxend;
- RExC_parse--;
-
- Set_Node_Offset(ret, parse_start + 2);
- Set_Node_Cur_Length(ret);
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- }
- break;
- case 'N':
- /* Handle \N and \N{NAME} here and not below because it can be
- multicharacter. join_exact() will join them up later on.
- Also this makes sure that things like /\N{BLAH}+/ and
- \N{BLAH} being multi char Just Happen. dmq*/
- ++RExC_parse;
- ret= reg_namedseq(pRExC_state, NULL, flagp);
- break;
- case 'k': /* Handle \k<NAME> and \k'NAME' */
- parse_named_seq:
- {
- char ch= RExC_parse[1];
- if (ch != '<' && ch != '\'' && ch != '{') {
- RExC_parse++;
- vFAIL2("Sequence %.2s... not terminated",parse_start);
- } else {
- /* this pretty much dupes the code for (?P=...) in reg(), if
- you change this make sure you change that */
- char* name_start = (RExC_parse += 2);
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- ch= (ch == '<') ? '>' : (ch == '{') ? '}' : '\'';
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
-
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
-
- }
- break;
- }
- case 'g':
- case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 num;
- bool isg = *RExC_parse == 'g';
- bool isrel = 0;
- bool hasbrace = 0;
- if (isg) {
- RExC_parse++;
- if (*RExC_parse == '{') {
- RExC_parse++;
- hasbrace = 1;
- }
- if (*RExC_parse == '-') {
- RExC_parse++;
- isrel = 1;
- }
- if (hasbrace && !isDIGIT(*RExC_parse)) {
- if (isrel) RExC_parse--;
- RExC_parse -= 2;
- goto parse_named_seq;
- } }
- num = atoi(RExC_parse);
- if (isg && num == 0)
- vFAIL("Reference to invalid group 0");
- if (isrel) {
- num = RExC_npar - num;
- if (num < 1)
- vFAIL("Reference to nonexistent or unclosed group");
- }
- if (!isg && num > 9 && num >= RExC_npar)
- goto defchar;
- else {
- char * const parse_start = RExC_parse - 1; /* MJD */
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (parse_start == RExC_parse - 1)
- vFAIL("Unterminated \\g... pattern");
- if (hasbrace) {
- if (*RExC_parse != '}')
- vFAIL("Unterminated \\g{...} pattern");
- RExC_parse++;
- }
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens)
- vFAIL("Reference to nonexistent group");
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? REFFL : REFF) : REF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- }
- }
- break;
- case '\0':
- if (RExC_parse >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- /* Do not generate "unrecognized" warnings here, we fall
- back into the quick-grab loop below */
- parse_start--;
- goto defchar;
- }
- break;
-
- case '#':
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if ( reg_skipcomment( pRExC_state ) )
- goto tryagain;
- }
- /* FALL THROUGH */
-
- default:
- outer_default:{
- register STRLEN len;
- register UV ender;
- register char *p;
- char *s;
- STRLEN foldlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
-
- parse_start = RExC_parse - 1;
-
- RExC_parse++;
-
- defchar:
- ender = 0;
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s = STRING(ret);
- for (len = 0, p = RExC_parse - 1;
- len < 127 && p < RExC_end;
- len++)
- {
- char * const oldp = p;
-
- if (RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- switch ((U8)*p) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case '^':
- case '$':
- case '.':
- case '[':
- case '(':
- case ')':
- case '|':
- goto loopdone;
- case '\\':
- /* Literal Escapes Switch
-
- This switch is meant to handle escape sequences that
- resolve to a literal character.
-
- Every escape sequence that represents something
- else, like an assertion or a char class, is handled
- in the switch marked 'Special Escapes' above in this
- routine, but also has an entry here as anything that
- isn't explicitly mentioned here will be treated as
- an unescaped equivalent literal.
- */
-
- switch ((U8)*++p) {
- /* These are all the special escapes. */
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case 'A': /* Start assertion */
- case 'b': case 'B': /* Word-boundary assertion*/
- case 'C': /* Single char !DANGEROUS! */
- case 'd': case 'D': /* digit class */
- case 'g': case 'G': /* generic-backref, pos assertion */
- case 'h': case 'H': /* HORIZWS */
- case 'k': case 'K': /* named backref, keep marker */
- case 'N': /* named char sequence */
- case 'p': case 'P': /* Unicode property */
- case 'R': /* LNBREAK */
- case 's': case 'S': /* space class */
- case 'v': case 'V': /* VERTWS */
- case 'w': case 'W': /* word class */
- case 'X': /* eXtended Unicode "combining character sequence" */
- case 'z': case 'Z': /* End of line/string assertion */
- --p;
- goto loopdone;
-
- /* Anything after here is an escape that resolves to a
- literal. (Except digits, which may or may not)
- */
- case 'n':
- ender = '\n';
- p++;
- break;
- case 'r':
- ender = '\r';
- p++;
- break;
- case 't':
- ender = '\t';
- p++;
- break;
- case 'f':
- ender = '\f';
- p++;
- break;
- case 'e':
- ender = ASCII_TO_NATIVE('\033');
- p++;
- break;
- case 'a':
- ender = ASCII_TO_NATIVE('\007');
- p++;
- break;
- case 'x':
- if (*++p == '{') {
- char* const e = strchr(p, '}');
-
- if (!e) {
- RExC_parse = p + 1;
- vFAIL("Missing right brace on \\x{}");
- }
- else {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = e - p - 1;
- ender = grok_hex(p + 1, &numlen, &flags, NULL);
- if (ender > 0xff)
- RExC_utf8 = 1;
- p = e + 1;
- }
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = 2;
- ender = grok_hex(p, &numlen, &flags, NULL);
- p += numlen;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- p++;
- ender = UCHARAT(p++);
- ender = toCTRL(ender);
- break;
- case '0': case '1': case '2': case '3':case '4':
- case '5': case '6': case '7': case '8':case '9':
- if (*p == '0' ||
- (isDIGIT(p[1]) && atoi(p) >= RExC_npar) ) {
- I32 flags = 0;
- STRLEN numlen = 3;
- ender = grok_oct(p, &numlen, &flags, NULL);
-
- /* An octal above 0xff is interpreted differently
- * depending on if the re is in utf8 or not. If it
- * is in utf8, the value will be itself, otherwise
- * it is interpreted as modulo 0x100. It has been
- * decided to discourage the use of octal above the
- * single-byte range. For now, warn only when
- * it ends up modulo */
- if (SIZE_ONLY && ender >= 0x100
- && ! UTF && ! PL_encoding) {
- ckWARNregdep(p, "Use of octal value above 377 is deprecated");
- }
- p += numlen;
- }
- else {
- --p;
- goto loopdone;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- recode_encoding:
- {
- SV* enc = PL_encoding;
- ender = reg_recode((const char)(U8)ender, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(p, "Invalid escape in the specified encoding");
- RExC_utf8 = 1;
- }
- break;
- case '\0':
- if (p >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- if (!SIZE_ONLY&& isALPHA(*p))
- ckWARN2reg(p + 1, "Unrecognized escape \\%c passed through", UCHARAT(p));
- goto normal_default;
- }
- break;
- default:
- normal_default:
- if (UTF8_IS_START(*p) && UTF) {
- STRLEN numlen;
- ender = utf8n_to_uvchr((U8*)p, RExC_end - p,
- &numlen, UTF8_ALLOW_DEFAULT);
- p += numlen;
- }
- else
- ender = *p++;
- break;
- }
- if ( RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- if (UTF && FOLD) {
- /* Prime the casefolded buffer. */
- ender = toFOLD_uni(ender, tmpbuf, &foldlen);
- }
- if (p < RExC_end && ISMULT2(p)) { /* Back off on ?+*. */
- if (len)
- p = oldp;
- else if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- }
- else {
- len++;
- REGC((char)ender, s++);
- }
- break;
- }
- if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- len += unilen;
- s += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break;
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- len--;
- }
- else
- REGC((char)ender, s++);
- }
- loopdone:
- RExC_parse = p - 1;
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
- {
- /* len is STRLEN which is unsigned, need to copy to signed */
- IV iv = len;
- if (iv < 0)
- vFAIL("Internal disaster");
- }
- if (len > 0)
- *flagp |= HASWIDTH;
- if (len == 1 && UNI_IS_INVARIANT(ender))
- *flagp |= SIMPLE;
-
- if (SIZE_ONLY)
- RExC_size += STR_SZ(len);
- else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- }
- break;
- }
-
- return(ret);
-}
-
-STATIC char *
-S_regwhite( RExC_state_t *pRExC_state, char *p )
-{
- const char *e = RExC_end;
-
- PERL_ARGS_ASSERT_REGWHITE;
-
- while (p < e) {
- if (isSPACE(*p))
- ++p;
- else if (*p == '#') {
- bool ended = 0;
- do {
- if (*p++ == '\n') {
- ended = 1;
- break;
- }
- } while (p < e);
- if (!ended)
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- }
- else
- break;
- }
- return p;
-}
-
-/* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]].
- Character classes ([:foo:]) can also be negated ([:^foo:]).
- Returns a named class id (ANYOF_XXX) if successful, -1 otherwise.
- Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed,
- but trigger failures because they are currently unimplemented. */
-
-#define POSIXCC_DONE(c) ((c) == ':')
-#define POSIXCC_NOTYET(c) ((c) == '=' || (c) == '.')
-#define POSIXCC(c) (POSIXCC_DONE(c) || POSIXCC_NOTYET(c))
-
-STATIC I32
-S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value)
-{
- dVAR;
- I32 namedclass = OOB_NAMEDCLASS;
-
- PERL_ARGS_ASSERT_REGPPOSIXCC;
-
- if (value == '[' && RExC_parse + 1 < RExC_end &&
- /* I smell either [: or [= or [. -- POSIX has been here, right? */
- POSIXCC(UCHARAT(RExC_parse))) {
- const char c = UCHARAT(RExC_parse);
- char* const s = RExC_parse++;
-
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != c)
- RExC_parse++;
- if (RExC_parse == RExC_end)
- /* Grandfather lone [:, [=, [. */
- RExC_parse = s;
- else {
- const char* const t = RExC_parse++; /* skip over the c */
- assert(*t == c);
-
- if (UCHARAT(RExC_parse) == ']') {
- const char *posixcc = s + 1;
- RExC_parse++; /* skip over the ending ] */
-
- if (*s == ':') {
- const I32 complement = *posixcc == '^' ? *posixcc++ : 0;
- const I32 skip = t - posixcc;
-
- /* Initially switch on the length of the name. */
- switch (skip) {
- case 4:
- if (memEQ(posixcc, "word", 4)) /* this is not POSIX, this is the Perl \w */
- namedclass = complement ? ANYOF_NALNUM : ANYOF_ALNUM;
- break;
- case 5:
- /* Names all of length 5. */
- /* alnum alpha ascii blank cntrl digit graph lower
- print punct space upper */
- /* Offset 4 gives the best switch position. */
- switch (posixcc[4]) {
- case 'a':
- if (memEQ(posixcc, "alph", 4)) /* alpha */
- namedclass = complement ? ANYOF_NALPHA : ANYOF_ALPHA;
- break;
- case 'e':
- if (memEQ(posixcc, "spac", 4)) /* space */
- namedclass = complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC;
- break;
- case 'h':
- if (memEQ(posixcc, "grap", 4)) /* graph */
- namedclass = complement ? ANYOF_NGRAPH : ANYOF_GRAPH;
- break;
- case 'i':
- if (memEQ(posixcc, "asci", 4)) /* ascii */
- namedclass = complement ? ANYOF_NASCII : ANYOF_ASCII;
- break;
- case 'k':
- if (memEQ(posixcc, "blan", 4)) /* blank */
- namedclass = complement ? ANYOF_NBLANK : ANYOF_BLANK;
- break;
- case 'l':
- if (memEQ(posixcc, "cntr", 4)) /* cntrl */
- namedclass = complement ? ANYOF_NCNTRL : ANYOF_CNTRL;
- break;
- case 'm':
- if (memEQ(posixcc, "alnu", 4)) /* alnum */
- namedclass = complement ? ANYOF_NALNUMC : ANYOF_ALNUMC;
- break;
- case 'r':
- if (memEQ(posixcc, "lowe", 4)) /* lower */
- namedclass = complement ? ANYOF_NLOWER : ANYOF_LOWER;
- else if (memEQ(posixcc, "uppe", 4)) /* upper */
- namedclass = complement ? ANYOF_NUPPER : ANYOF_UPPER;
- break;
- case 't':
- if (memEQ(posixcc, "digi", 4)) /* digit */
- namedclass = complement ? ANYOF_NDIGIT : ANYOF_DIGIT;
- else if (memEQ(posixcc, "prin", 4)) /* print */
- namedclass = complement ? ANYOF_NPRINT : ANYOF_PRINT;
- else if (memEQ(posixcc, "punc", 4)) /* punct */
- namedclass = complement ? ANYOF_NPUNCT : ANYOF_PUNCT;
- break;
- }
- break;
- case 6:
- if (memEQ(posixcc, "xdigit", 6))
- namedclass = complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT;
- break;
- }
-
- if (namedclass == OOB_NAMEDCLASS)
- Simple_vFAIL3("POSIX class [:%.*s:] unknown",
- t - s - 1, s + 1);
- assert (posixcc[skip] == ':');
- assert (posixcc[skip+1] == ']');
- } else if (!SIZE_ONLY) {
- /* [[=foo=]] and [[.foo.]] are still future. */
-
- /* adjust RExC_parse so the warning shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse) != ']')
- RExC_parse++;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- } else {
- /* Maternal grandfather:
- * "[:" ending in ":" but not in ":]" */
- RExC_parse = s;
- }
- }
- }
-
- return namedclass;
-}
-
-STATIC void
-S_checkposixcc(pTHX_ RExC_state_t *pRExC_state)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_CHECKPOSIXCC;
-
- if (POSIXCC(UCHARAT(RExC_parse))) {
- const char *s = RExC_parse;
- const char c = *s++;
-
- while (isALNUM(*s))
- s++;
- if (*s && c == *s && s[1] == ']') {
- ckWARN3reg(s+2,
- "POSIX syntax [%c %c] belongs inside character classes",
- c, c);
-
- /* [[=foo=]] and [[.foo.]] are still future. */
- if (POSIXCC_NOTYET(c)) {
- /* adjust RExC_parse so the error shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse++) != ']')
- NOOP;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- }
- }
-}
-
-
-#define _C_C_T_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_N##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '!'; \
- what = WORD; \
- break
-
-#define _C_C_T_NOLOC_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '!'; \
- what = WORD; \
- break
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define POSIX_CC_UNI_NAME(CCNAME) CCNAME
-#else
-#define POSIX_CC_UNI_NAME(CCNAME) "Posix" CCNAME
-#endif
-
-/*
- parse a class specification and produce either an ANYOF node that
- matches the pattern or if the pattern matches a single char only and
- that char is < 256 and we are case insensitive then we produce an
- EXACT node instead.
-*/
-
-STATIC regnode *
-S_regclass(pTHX_ RExC_state_t *pRExC_state, U32 depth)
-{
- dVAR;
- register UV nextvalue;
- register IV prevvalue = OOB_UNICODE;
- register IV range = 0;
- UV value = 0; /* XXX:dmq: needs to be referenceable (unfortunately) */
- register regnode *ret;
- STRLEN numlen;
- IV namedclass;
- char *rangebegin = NULL;
- bool need_class = 0;
- SV *listsv = NULL;
- UV n;
- bool optimize_invert = TRUE;
- AV* unicode_alternate = NULL;
-#ifdef EBCDIC
- UV literal_endpoint = 0;
-#endif
- UV stored = 0; /* number of chars stored in the class */
-
- regnode * const orig_emit = RExC_emit; /* Save the original RExC_emit in
- case we need to change the emitted regop to an EXACT. */
- const char * orig_parse = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCLASS;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- DEBUG_PARSE("clas");
-
- /* Assume we are going to generate an ANYOF node. */
- ret = reganode(pRExC_state, ANYOF, 0);
-
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) = 0;
-
- if (UCHARAT(RExC_parse) == '^') { /* Complement of range. */
- RExC_naughty++;
- RExC_parse++;
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) |= ANYOF_INVERT;
- }
-
- if (SIZE_ONLY) {
- RExC_size += ANYOF_SKIP;
- listsv = &PL_sv_undef; /* For code scanners: listsv always non-NULL. */
- }
- else {
- RExC_emit += ANYOF_SKIP;
- if (FOLD)
- ANYOF_FLAGS(ret) |= ANYOF_FOLD;
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_LOCALE;
- ANYOF_BITMAP_ZERO(ret);
- listsv = newSVpvs("# comment\n");
- }
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
-
- if (!SIZE_ONLY && POSIXCC(nextvalue))
- checkposixcc(pRExC_state);
-
- /* allow 1st char to be ] (allowing it to be - is dealt with later) */
- if (UCHARAT(RExC_parse) == ']')
- goto charclassloop;
-
-parseit:
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != ']') {
-
- charclassloop:
-
- namedclass = OOB_NAMEDCLASS; /* initialize as illegal */
-
- if (!range)
- rangebegin = RExC_parse;
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
- if (value == '[' && POSIXCC(nextvalue))
- namedclass = regpposixcc(pRExC_state, value);
- else if (value == '\\') {
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
- /* Some compilers cannot handle switching on 64-bit integer
- * values, therefore value cannot be an UV. Yes, this will
- * be a problem later if we want switch on Unicode.
- * A similar issue a little bit later when switching on
- * namedclass. --jhi */
- switch ((I32)value) {
- case 'w': namedclass = ANYOF_ALNUM; break;
- case 'W': namedclass = ANYOF_NALNUM; break;
- case 's': namedclass = ANYOF_SPACE; break;
- case 'S': namedclass = ANYOF_NSPACE; break;
- case 'd': namedclass = ANYOF_DIGIT; break;
- case 'D': namedclass = ANYOF_NDIGIT; break;
- case 'v': namedclass = ANYOF_VERTWS; break;
- case 'V': namedclass = ANYOF_NVERTWS; break;
- case 'h': namedclass = ANYOF_HORIZWS; break;
- case 'H': namedclass = ANYOF_NHORIZWS; break;
- case 'N': /* Handle \N{NAME} in class */
- {
- /* We only pay attention to the first char of
- multichar strings being returned. I kinda wonder
- if this makes sense as it does change the behaviour
- from earlier versions, OTOH that behaviour was broken
- as well. */
- UV v; /* value is register so we cant & it /grrr */
- if (reg_namedseq(pRExC_state, &v, NULL)) {
- goto parseit;
- }
- value= v;
- }
- break;
- case 'p':
- case 'P':
- {
- char *e;
- if (RExC_parse >= RExC_end)
- vFAIL2("Empty \\%c{}", (U8)value);
- if (*RExC_parse == '{') {
- const U8 c = (U8)value;
- e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL2("Missing right brace on \\%c{}", c);
- while (isSPACE(UCHARAT(RExC_parse)))
- RExC_parse++;
- if (e == RExC_parse)
- vFAIL2("Empty \\%c{}", c);
- n = e - RExC_parse;
- while (isSPACE(UCHARAT(RExC_parse + n - 1)))
- n--;
- }
- else {
- e = RExC_parse;
- n = 1;
- }
- if (!SIZE_ONLY) {
- if (UCHARAT(RExC_parse) == '^') {
- RExC_parse++;
- n--;
- value = value == 'p' ? 'P' : 'p'; /* toggle */
- while (isSPACE(UCHARAT(RExC_parse))) {
- RExC_parse++;
- n--;
- }
- }
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::%.*s\n",
- (value=='p' ? '+' : '!'), (int)n, RExC_parse);
- }
- RExC_parse = e + 1;
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- namedclass = ANYOF_MAX; /* no official name, but it's named */
- }
- break;
- case 'n': value = '\n'; break;
- case 'r': value = '\r'; break;
- case 't': value = '\t'; break;
- case 'f': value = '\f'; break;
- case 'b': value = '\b'; break;
- case 'e': value = ASCII_TO_NATIVE('\033');break;
- case 'a': value = ASCII_TO_NATIVE('\007');break;
- case 'x':
- if (*RExC_parse == '{') {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- char * const e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL("Missing right brace on \\x{}");
-
- numlen = e - RExC_parse;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse = e + 1;
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- numlen = 2;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- }
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- value = UCHARAT(RExC_parse++);
- value = toCTRL(value);
- break;
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 flags = 0;
- numlen = 3;
- value = grok_oct(--RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- }
- recode_encoding:
- {
- SV* enc = PL_encoding;
- value = reg_recode((const char)(U8)value, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(RExC_parse,
- "Invalid escape in the specified encoding");
- break;
- }
- default:
- if (!SIZE_ONLY && isALPHA(value))
- ckWARN2reg(RExC_parse,
- "Unrecognized escape \\%c in character class passed through",
- (int)value);
- break;
- }
- } /* end of \blah */
-#ifdef EBCDIC
- else
- literal_endpoint++;
-#endif
-
- if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */
-
- if (!SIZE_ONLY && !need_class)
- ANYOF_CLASS_ZERO(ret);
-
- need_class = 1;
-
- /* a bad range like a-\d, a-[:digit:] ? */
- if (range) {
- if (!SIZE_ONLY) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- ckWARN4reg(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
-
- if (prevvalue < 256) {
- ANYOF_BITMAP_SET(ret, prevvalue);
- ANYOF_BITMAP_SET(ret, '-');
- }
- else {
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-');
- }
- }
-
- range = 0; /* this was not a true range */
- }
-
-
-
- if (!SIZE_ONLY) {
- const char *what = NULL;
- char yesno = 0;
-
- if (namedclass > OOB_NAMEDCLASS)
- optimize_invert = FALSE;
- /* Possible truncation here but in some 64-bit environments
- * the compiler gets heartburn about switch on 64-bit values.
- * A similar issue a little earlier when switching on value.
- * --jhi */
- switch ((I32)namedclass) {
-
- case _C_C_T_(ALNUMC, isALNUMC(value), POSIX_CC_UNI_NAME("Alnum"));
- case _C_C_T_(ALPHA, isALPHA(value), POSIX_CC_UNI_NAME("Alpha"));
- case _C_C_T_(BLANK, isBLANK(value), POSIX_CC_UNI_NAME("Blank"));
- case _C_C_T_(CNTRL, isCNTRL(value), POSIX_CC_UNI_NAME("Cntrl"));
- case _C_C_T_(GRAPH, isGRAPH(value), POSIX_CC_UNI_NAME("Graph"));
- case _C_C_T_(LOWER, isLOWER(value), POSIX_CC_UNI_NAME("Lower"));
- case _C_C_T_(PRINT, isPRINT(value), POSIX_CC_UNI_NAME("Print"));
- case _C_C_T_(PSXSPC, isPSXSPC(value), POSIX_CC_UNI_NAME("Space"));
- case _C_C_T_(PUNCT, isPUNCT(value), POSIX_CC_UNI_NAME("Punct"));
- case _C_C_T_(UPPER, isUPPER(value), POSIX_CC_UNI_NAME("Upper"));
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
- case _C_C_T_(ALNUM, isALNUM(value), "Word");
- case _C_C_T_(SPACE, isSPACE(value), "SpacePerl");
-#else
- case _C_C_T_(SPACE, isSPACE(value), "PerlSpace");
- case _C_C_T_(ALNUM, isALNUM(value), "PerlWord");
-#endif
- case _C_C_T_(XDIGIT, isXDIGIT(value), "XDigit");
- case _C_C_T_NOLOC_(VERTWS, is_VERTWS_latin1(&value), "VertSpace");
- case _C_C_T_NOLOC_(HORIZWS, is_HORIZWS_latin1(&value), "HorizSpace");
- case ANYOF_ASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_ASCII);
- else {
-#ifndef EBCDIC
- for (value = 0; value < 128; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '+';
- what = "ASCII";
- break;
- case ANYOF_NASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NASCII);
- else {
-#ifndef EBCDIC
- for (value = 128; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (!isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '!';
- what = "ASCII";
- break;
- case ANYOF_DIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_DIGIT);
- else {
- /* consecutive digits assumed */
- for (value = '0'; value <= '9'; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '+';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_NDIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NDIGIT);
- else {
- /* consecutive digits assumed */
- for (value = 0; value < '0'; value++)
- ANYOF_BITMAP_SET(ret, value);
- for (value = '9' + 1; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '!';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_MAX:
- /* this is to handle \p and \P */
- break;
- default:
- vFAIL("Invalid [::] class");
- break;
- }
- if (what) {
- /* Strings such as "+utf8::isWord\n" */
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::Is%s\n", yesno, what);
- }
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_CLASS;
- continue;
- }
- } /* end of namedclass \blah */
-
- if (range) {
- if (prevvalue > (IV)value) /* b-a */ {
- const int w = RExC_parse - rangebegin;
- Simple_vFAIL4("Invalid [] range \"%*.*s\"", w, w, rangebegin);
- range = 0; /* not a valid range */
- }
- }
- else {
- prevvalue = value; /* save the beginning of the range */
- if (*RExC_parse == '-' && RExC_parse+1 < RExC_end &&
- RExC_parse[1] != ']') {
- RExC_parse++;
-
- /* a bad range like \w-, [:word:]- ? */
- if (namedclass > OOB_NAMEDCLASS) {
- if (ckWARN(WARN_REGEXP)) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- vWARN4(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
- }
- if (!SIZE_ONLY)
- ANYOF_BITMAP_SET(ret, '-');
- } else
- range = 1; /* yeah, it's a range! */
- continue; /* but do it the next time */
- }
- }
-
- /* now is the next time */
- /*stored += (value - prevvalue + 1);*/
- if (!SIZE_ONLY) {
- if (prevvalue < 256) {
- const IV ceilvalue = value < 256 ? value : 255;
- IV i;
-#ifdef EBCDIC
- /* In EBCDIC [\x89-\x91] should include
- * the \x8e but [i-j] should not. */
- if (literal_endpoint == 2 &&
- ((isLOWER(prevvalue) && isLOWER(ceilvalue)) ||
- (isUPPER(prevvalue) && isUPPER(ceilvalue))))
- {
- if (isLOWER(prevvalue)) {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isLOWER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- } else {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isUPPER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- else
-#endif
- for (i = prevvalue; i <= ceilvalue; i++) {
- if (!ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- if (value > 255 || UTF) {
- const UV prevnatvalue = NATIVE_TO_UNI(prevvalue);
- const UV natvalue = NATIVE_TO_UNI(value);
- stored+=2; /* can't optimize this class */
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- if (prevnatvalue < natvalue) { /* what about > ? */
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n",
- prevnatvalue, natvalue);
- }
- else if (prevnatvalue == natvalue) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", natvalue);
- if (FOLD) {
- U8 foldbuf[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const UV f = to_uni_fold(natvalue, foldbuf, &foldlen);
-
-#ifdef EBCDIC /* RD t/uni/fold ff and 6b */
- if (RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xDF || f == 0x92)) {
- f = NATIVE_TO_UNI(f);
- }
-#endif
- /* If folding and foldable and a single
- * character, insert also the folded version
- * to the charclass. */
- if (f != value) {
-#ifdef EBCDIC /* RD tunifold ligatures s,t fb05, fb06 */
- if ((RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xA2 &&
- (value == 0xFB05 || value == 0xFB06))) ?
- foldlen == ((STRLEN)UNISKIP(f) - 1) :
- foldlen == (STRLEN)UNISKIP(f) )
-#else
- if (foldlen == (STRLEN)UNISKIP(f))
-#endif
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n", f);
- else {
- /* Any multicharacter foldings
- * require the following transform:
- * [ABCDEF] -> (?:[ABCabcDEFd]|pq|rst)
- * where E folds into "pq" and F folds
- * into "rst", all other characters
- * fold to single characters. We save
- * away these multicharacter foldings,
- * to be later saved as part of the
- * additional "s" data. */
- SV *sv;
-
- if (!unicode_alternate)
- unicode_alternate = newAV();
- sv = newSVpvn_utf8((char*)foldbuf, foldlen,
- TRUE);
- av_push(unicode_alternate, sv);
- }
- }
-
- /* If folding and the value is one of the Greek
- * sigmas insert a few more sigmas to make the
- * folding rules of the sigmas to work right.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (literal or EXACTF cases) are handled
- * during runtime in regexec.c:S_find_byclass(). */
- if (value == UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA);
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- else if (value == UNICODE_GREEK_CAPITAL_LETTER_SIGMA)
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- }
- }
-#ifdef EBCDIC
- literal_endpoint = 0;
-#endif
- }
-
- range = 0; /* this range (if it was one) is done now */
- }
-
- if (need_class) {
- ANYOF_FLAGS(ret) |= ANYOF_LARGE;
- if (SIZE_ONLY)
- RExC_size += ANYOF_CLASS_ADD_SKIP;
- else
- RExC_emit += ANYOF_CLASS_ADD_SKIP;
- }
-
-
- if (SIZE_ONLY)
- return ret;
- /****** !SIZE_ONLY AFTER HERE *********/
-
- if( stored == 1 && (value < 128 || (value < 256 && !UTF))
- && !( ANYOF_FLAGS(ret) & ( ANYOF_FLAGS_ALL ^ ANYOF_FOLD ) )
- ) {
- /* optimize single char class to an EXACT node
- but *only* when its not a UTF/high char */
- const char * cur_parse= RExC_parse;
- RExC_emit = (regnode *)orig_emit;
- RExC_parse = (char *)orig_parse;
- ret = reg_node(pRExC_state,
- (U8)((ANYOF_FLAGS(ret) & ANYOF_FOLD) ? EXACTF : EXACT));
- RExC_parse = (char *)cur_parse;
- *STRING(ret)= (char)value;
- STR_LEN(ret)= 1;
- RExC_emit += STR_SZ(1);
- SvREFCNT_dec(listsv);
- return ret;
- }
- /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */
- if ( /* If the only flag is folding (plus possibly inversion). */
- ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD)
- ) {
- for (value = 0; value < 256; ++value) {
- if (ANYOF_BITMAP_TEST(ret, value)) {
- UV fold = PL_fold[value];
-
- if (fold != value)
- ANYOF_BITMAP_SET(ret, fold);
- }
- }
- ANYOF_FLAGS(ret) &= ~ANYOF_FOLD;
- }
-
- /* optimize inverted simple patterns (e.g. [^a-z]) */
- if (optimize_invert &&
- /* If the only flag is inversion. */
- (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) {
- for (value = 0; value < ANYOF_BITMAP_SIZE; ++value)
- ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL;
- ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL;
- }
- {
- AV * const av = newAV();
- SV *rv;
- /* The 0th element stores the character class description
- * in its textual form: used later (regexec.c:Perl_regclass_swash())
- * to initialize the appropriate swash (which gets stored in
- * the 1st element), and also useful for dumping the regnode.
- * The 2nd element stores the multicharacter foldings,
- * used later (regexec.c:S_reginclass()). */
- av_store(av, 0, listsv);
- av_store(av, 1, NULL);
- av_store(av, 2, MUTABLE_SV(unicode_alternate));
- rv = newRV_noinc(MUTABLE_SV(av));
- n = add_data(pRExC_state, 1, "s");
- RExC_rxi->data->data[n] = (void*)rv;
- ARG_SET(ret, n);
- }
- return ret;
-}
-#undef _C_C_T_
-
-
-/* reg_skipcomment()
-
- Absorbs an /x style # comments from the input stream.
- Returns true if there is more text remaining in the stream.
- Will set the REG_SEEN_RUN_ON_COMMENT flag if the comment
- terminates the pattern without including a newline.
-
- Note its the callers responsibility to ensure that we are
- actually in /x mode
-
-*/
-
-STATIC bool
-S_reg_skipcomment(pTHX_ RExC_state_t *pRExC_state)
-{
- bool ended = 0;
-
- PERL_ARGS_ASSERT_REG_SKIPCOMMENT;
-
- while (RExC_parse < RExC_end)
- if (*RExC_parse++ == '\n') {
- ended = 1;
- break;
- }
- if (!ended) {
- /* we ran off the end of the pattern without ending
- the comment, so we have to add an \n when wrapping */
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- return 0;
- } else
- return 1;
-}
-
-/* nextchar()
-
- Advance that parse position, and optionall absorbs
- "whitespace" from the inputstream.
-
- Without /x "whitespace" means (?#...) style comments only,
- with /x this means (?#...) and # comments and whitespace proper.
-
- Returns the RExC_parse point from BEFORE the scan occurs.
-
- This is the /x friendly way of saying RExC_parse++.
-*/
-
-STATIC char*
-S_nextchar(pTHX_ RExC_state_t *pRExC_state)
-{
- char* const retval = RExC_parse++;
-
- PERL_ARGS_ASSERT_NEXTCHAR;
-
- for (;;) {
- if (*RExC_parse == '(' && RExC_parse[1] == '?' &&
- RExC_parse[2] == '#') {
- while (*RExC_parse != ')') {
- if (RExC_parse == RExC_end)
- FAIL("Sequence (?#... not terminated");
- RExC_parse++;
- }
- RExC_parse++;
- continue;
- }
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if (isSPACE(*RExC_parse)) {
- RExC_parse++;
- continue;
- }
- else if (*RExC_parse == '#') {
- if ( reg_skipcomment( pRExC_state ) )
- continue;
- }
- }
- return retval;
- }
-}
-
-/*
-- reg_node - emit a node
-*/
-STATIC regnode * /* Location. */
-S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 1;
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE(ptr, op);
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, (ptr) - 1);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s:%d: (op %s) %s %"UVuf" (len %"UVuf") (max %"UVuf").\n",
- "reg_node", __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(RExC_emit, RExC_parse + (op == END));
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reganode - emit a node with an argument
-*/
-STATIC regnode * /* Location. */
-S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGANODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 2;
- /*
- We can't do this:
-
- assert(2==regarglen[op]+1);
-
- Anything larger than this has to allocate the extra amount.
- If we changed this to be:
-
- RExC_size += (1 + regarglen[op]);
-
- then it wouldn't matter. Its not clear what side effect
- might come from that so its not done so far.
- -- dmq
- */
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE_ARG(ptr, op, arg);
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, (ptr) - 2);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reganode",
- __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] ?
- "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Cur_Node_Offset;
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reguni - emit (if appropriate) a Unicode character
-*/
-STATIC STRLEN
-S_reguni(pTHX_ const RExC_state_t *pRExC_state, UV uv, char* s)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGUNI;
-
- return SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s);
-}
-
-/*
-- reginsert - insert an operator in front of already-emitted operand
-*
-* Means relocating the operand.
-*/
-STATIC void
-S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd, U32 depth)
-{
- dVAR;
- register regnode *src;
- register regnode *dst;
- register regnode *place;
- const int offset = regarglen[(U8)op];
- const int size = NODE_STEP_REGNODE + offset;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGINSERT;
- PERL_UNUSED_ARG(depth);
-/* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */
- DEBUG_PARSE_FMT("inst"," - %s",PL_reg_name[op]);
- if (SIZE_ONLY) {
- RExC_size += size;
- return;
- }
-
- src = RExC_emit;
- RExC_emit += size;
- dst = RExC_emit;
- if (RExC_open_parens) {
- int paren;
- /*DEBUG_PARSE_FMT("inst"," - %"IVdf, (IV)RExC_npar);*/
- for ( paren=0 ; paren < RExC_npar ; paren++ ) {
- if ( RExC_open_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("open"," - %d",size);*/
- RExC_open_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("open"," - %s","ok");*/
- }
- if ( RExC_close_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("close"," - %d",size);*/
- RExC_close_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("close"," - %s","ok");*/
- }
- }
- }
-
- while (src > opnd) {
- StructCopy(--src, --dst, regnode);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD 20010112 */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s copy %"UVuf" -> %"UVuf" (max %"UVuf").\n",
- "reg_insert",
- __LINE__,
- PL_reg_name[op],
- (UV)(dst - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(src - RExC_emit_start),
- (UV)(dst - RExC_emit_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src));
- Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src));
- }
-#endif
- }
-
-
- place = opnd; /* Op node, where operand used to be. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reginsert",
- __LINE__,
- PL_reg_name[op],
- (UV)(place - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(place - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(place, RExC_parse);
- Set_Node_Length(place, 1);
- }
-#endif
- src = NEXTOPER(place);
- FILL_ADVANCE_NODE(place, op);
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, (place) - 1);
- Zero(src, offset, regnode);
-}
-
-/*
-- regtail - set the next-pointer at the end of a node chain of p to val.
-- SEE ALSO: regtail_study
-*/
-/* TODO: All three parms should be const */
-STATIC void
-S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- if (SIZE_ONLY)
- return;
-
- /* Find last node. */
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tail" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) %s %s\n",
- SvPV_nolen_const(mysv), REG_NODE_NUM(scan),
- (temp == NULL ? "->" : ""),
- (temp == NULL ? PL_reg_name[OP(val)] : "")
- );
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
-
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-}
-
-#ifdef DEBUGGING
-/*
-- regtail_study - set the next-pointer at the end of a node chain of p to val.
-- Look for optimizable sequences at the same time.
-- currently only looks for EXACT chains.
-
-This is expermental code. The idea is to use this routine to perform
-in place optimizations on branches and groups as they are constructed,
-with the long term intention of removing optimization from study_chunk so
-that it is purely analytical.
-
-Currently only used when in DEBUG mode. The macro REGTAIL_STUDY() is used
-to control which is which.
-
-*/
-/* TODO: All four parms should be const */
-
-STATIC U8
-S_regtail_study(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- U8 exact = PSEUDO;
-#ifdef EXPERIMENTAL_INPLACESCAN
- I32 min = 0;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL_STUDY;
-
-
- if (SIZE_ONLY)
- return exact;
-
- /* Find last node. */
-
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (PL_regkind[OP(scan)] == EXACT)
- if (join_exact(pRExC_state,scan,&min,1,val,depth+1))
- return EXACT;
-#endif
- if ( exact ) {
- switch (OP(scan)) {
- case EXACT:
- case EXACTF:
- case EXACTFL:
- if( exact == PSEUDO )
- exact= OP(scan);
- else if ( exact != OP(scan) )
- exact= 0;
- case NOTHING:
- break;
- default:
- exact= 0;
- }
- }
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tsdy" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) -> %s\n",
- SvPV_nolen_const(mysv),
- REG_NODE_NUM(scan),
- PL_reg_name[exact]);
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
- DEBUG_PARSE_r({
- SV * const mysv_val=sv_newmortal();
- DEBUG_PARSE_MSG("");
- regprop(RExC_rx, mysv_val, val);
- PerlIO_printf(Perl_debug_log, "~ attach to %s (%"IVdf") offset to %"IVdf"\n",
- SvPV_nolen_const(mysv_val),
- (IV)REG_NODE_NUM(val),
- (IV)(val - scan)
- );
- });
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-
- return exact;
-}
-#endif
-
-/*
- - regcurly - a little FSA that accepts {\d+,?\d*}
- */
-STATIC I32
-S_regcurly(register const char *s)
-{
- PERL_ARGS_ASSERT_REGCURLY;
-
- if (*s++ != '{')
- return FALSE;
- if (!isDIGIT(*s))
- return FALSE;
- while (isDIGIT(*s))
- s++;
- if (*s == ',')
- s++;
- while (isDIGIT(*s))
- s++;
- if (*s != '}')
- return FALSE;
- return TRUE;
-}
-
-
-/*
- - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form
- */
-#ifdef DEBUGGING
-static void
-S_regdump_extflags(pTHX_ const char *lead, const U32 flags)
-{
- int bit;
- int set=0;
-
- for (bit=0; bit<32; bit++) {
- if (flags & (1<<bit)) {
- if (!set++ && lead)
- PerlIO_printf(Perl_debug_log, "%s",lead);
- PerlIO_printf(Perl_debug_log, "%s ",PL_reg_extflags_name[bit]);
- }
- }
- if (lead) {
- if (set)
- PerlIO_printf(Perl_debug_log, "\n");
- else
- PerlIO_printf(Perl_debug_log, "%s[none-set]\n",lead);
- }
-}
-#endif
-
-void
-Perl_regdump(pTHX_ const regexp *r)
-{
-#ifdef DEBUGGING
- dVAR;
- SV * const sv = sv_newmortal();
- SV *dsv= sv_newmortal();
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGDUMP;
-
- (void)dumpuntil(r, ri->program, ri->program + 1, NULL, NULL, sv, 0, 0);
-
- /* Header fields of interest. */
- if (r->anchored_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->anchored_substr),
- RE_SV_DUMPLEN(r->anchored_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_substr),
- (IV)r->anchored_offset);
- } else if (r->anchored_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->anchored_utf8),
- RE_SV_DUMPLEN(r->anchored_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored utf8 %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_utf8),
- (IV)r->anchored_offset);
- }
- if (r->float_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->float_substr),
- RE_SV_DUMPLEN(r->float_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "floating %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_substr),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- } else if (r->float_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->float_utf8),
- RE_SV_DUMPLEN(r->float_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "floating utf8 %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_utf8),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- }
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log,
- (const char *)
- (r->check_substr == r->float_substr
- && r->check_utf8 == r->float_utf8
- ? "(checking floating" : "(checking anchored"));
- if (r->extflags & RXf_NOSCAN)
- PerlIO_printf(Perl_debug_log, " noscan");
- if (r->extflags & RXf_CHECK_ALL)
- PerlIO_printf(Perl_debug_log, " isall");
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log, ") ");
-
- if (ri->regstclass) {
- regprop(r, sv, ri->regstclass);
- PerlIO_printf(Perl_debug_log, "stclass %s ", SvPVX_const(sv));
- }
- if (r->extflags & RXf_ANCH) {
- PerlIO_printf(Perl_debug_log, "anchored");
- if (r->extflags & RXf_ANCH_BOL)
- PerlIO_printf(Perl_debug_log, "(BOL)");
- if (r->extflags & RXf_ANCH_MBOL)
- PerlIO_printf(Perl_debug_log, "(MBOL)");
- if (r->extflags & RXf_ANCH_SBOL)
- PerlIO_printf(Perl_debug_log, "(SBOL)");
- if (r->extflags & RXf_ANCH_GPOS)
- PerlIO_printf(Perl_debug_log, "(GPOS)");
- PerlIO_putc(Perl_debug_log, ' ');
- }
- if (r->extflags & RXf_GPOS_SEEN)
- PerlIO_printf(Perl_debug_log, "GPOS:%"UVuf" ", (UV)r->gofs);
- if (r->intflags & PREGf_SKIP)
- PerlIO_printf(Perl_debug_log, "plus ");
- if (r->intflags & PREGf_IMPLICIT)
- PerlIO_printf(Perl_debug_log, "implicit ");
- PerlIO_printf(Perl_debug_log, "minlen %"IVdf" ", (IV)r->minlen);
- if (r->extflags & RXf_EVAL_SEEN)
- PerlIO_printf(Perl_debug_log, "with eval ");
- PerlIO_printf(Perl_debug_log, "\n");
- DEBUG_FLAGS_r(regdump_extflags("r->extflags: ",r->extflags));
-#else
- PERL_ARGS_ASSERT_REGDUMP;
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(r);
-#endif /* DEBUGGING */
-}
-
-/*
-- regprop - printable representation of opcode
-*/
-#define EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags) \
-STMT_START { \
- if (do_sep) { \
- Perl_sv_catpvf(aTHX_ sv,"%s][%s",PL_colors[1],PL_colors[0]); \
- if (flags & ANYOF_INVERT) \
- /*make sure the invert info is in each */ \
- sv_catpvs(sv, "^"); \
- do_sep = 0; \
- } \
-} STMT_END
-
-void
-Perl_regprop(pTHX_ const regexp *prog, SV *sv, const regnode *o)
-{
-#ifdef DEBUGGING
- dVAR;
- register int k;
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPROP;
-
- sv_setpvs(sv, "");
-
- if (OP(o) > REGNODE_MAX) /* regnode.type is unsigned */
- /* It would be nice to FAIL() here, but this may be called from
- regexec.c, and it would be hard to supply pRExC_state. */
- Perl_croak(aTHX_ "Corrupted regexp opcode %d > %d", (int)OP(o), (int)REGNODE_MAX);
- sv_catpv(sv, PL_reg_name[OP(o)]); /* Take off const! */
-
- k = PL_regkind[OP(o)];
-
- if (k == EXACT) {
- sv_catpvs(sv, " ");
- /* Using is_utf8_string() (via PERL_PV_UNI_DETECT)
- * is a crude hack but it may be the best for now since
- * we have no flag "this EXACTish node was UTF-8"
- * --jhi */
- pv_pretty(sv, STRING(o), STR_LEN(o), 60, PL_colors[0], PL_colors[1],
- PERL_PV_ESCAPE_UNI_DETECT |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT |
- PERL_PV_PRETTY_NOCLEAR
- );
- } else if (k == TRIE) {
- /* print the details of the trie in dumpuntil instead, as
- * progi->data isn't available here */
- const char op = OP(o);
- const U32 n = ARG(o);
- const reg_ac_data * const ac = IS_TRIE_AC(op) ?
- (reg_ac_data *)progi->data->data[n] :
- NULL;
- const reg_trie_data * const trie
- = (reg_trie_data*)progi->data->data[!IS_TRIE_AC(op) ? n : ac->trie];
-
- Perl_sv_catpvf(aTHX_ sv, "-%s",PL_reg_name[o->flags]);
- DEBUG_TRIE_COMPILE_r(
- Perl_sv_catpvf(aTHX_ sv,
- "<S:%"UVuf"/%"IVdf" W:%"UVuf" L:%"UVuf"/%"UVuf" C:%"UVuf"/%"UVuf">",
- (UV)trie->startstate,
- (IV)trie->statecount-1, /* -1 because of the unused 0 element */
- (UV)trie->wordcount,
- (UV)trie->minlen,
- (UV)trie->maxlen,
- (UV)TRIE_CHARCOUNT(trie),
- (UV)trie->uniquecharcount
- )
- );
- if ( IS_ANYOF_TRIE(op) || trie->bitmap ) {
- int i;
- int rangestart = -1;
- U8* bitmap = IS_ANYOF_TRIE(op) ? (U8*)ANYOF_BITMAP(o) : (U8*)TRIE_BITMAP(trie);
- sv_catpvs(sv, "[");
- for (i = 0; i <= 256; i++) {
- if (i < 256 && BITMAP_TEST(bitmap,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- rangestart = -1;
- }
- }
- sv_catpvs(sv, "]");
- }
-
- } else if (k == CURLY) {
- if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */
- Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o));
- }
- else if (k == WHILEM && o->flags) /* Ordinal/of */
- Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4);
- else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP || OP(o)==ACCEPT) {
- Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */
- if ( RXp_PAREN_NAMES(prog) ) {
- if ( k != REF || OP(o) < NREF) {
- AV *list= MUTABLE_AV(progi->data->data[progi->name_list_idx]);
- SV **name= av_fetch(list, ARG(o), 0 );
- if (name)
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- else {
- AV *list= MUTABLE_AV(progi->data->data[ progi->name_list_idx ]);
- SV *sv_dat= MUTABLE_SV(progi->data->data[ ARG( o ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
- SV **name= av_fetch(list, nums[0], 0 );
- I32 n;
- if (name) {
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- Perl_sv_catpvf(aTHX_ sv, "%s%"IVdf,
- (n ? "," : ""), (IV)nums[n]);
- }
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- }
- }
- } else if (k == GOSUB)
- Perl_sv_catpvf(aTHX_ sv, "%d[%+d]", (int)ARG(o),(int)ARG2L(o)); /* Paren and offset */
- else if (k == VERB) {
- if (!o->flags)
- Perl_sv_catpvf(aTHX_ sv, ":%"SVf,
- SVfARG((MUTABLE_SV(progi->data->data[ ARG( o ) ]))));
- } else if (k == LOGICAL)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */
- else if (k == FOLDCHAR)
- Perl_sv_catpvf(aTHX_ sv, "[0x%"UVXf"]", PTR2UV(ARG(o)) );
- else if (k == ANYOF) {
- int i, rangestart = -1;
- const U8 flags = ANYOF_FLAGS(o);
- int do_sep = 0;
-
- /* Should be synchronized with * ANYOF_ #xdefines in regcomp.h */
- static const char * const anyofs[] = {
- "\\w",
- "\\W",
- "\\s",
- "\\S",
- "\\d",
- "\\D",
- "[:alnum:]",
- "[:^alnum:]",
- "[:alpha:]",
- "[:^alpha:]",
- "[:ascii:]",
- "[:^ascii:]",
- "[:cntrl:]",
- "[:^cntrl:]",
- "[:graph:]",
- "[:^graph:]",
- "[:lower:]",
- "[:^lower:]",
- "[:print:]",
- "[:^print:]",
- "[:punct:]",
- "[:^punct:]",
- "[:upper:]",
- "[:^upper:]",
- "[:xdigit:]",
- "[:^xdigit:]",
- "[:space:]",
- "[:^space:]",
- "[:blank:]",
- "[:^blank:]"
- };
-
- if (flags & ANYOF_LOCALE)
- sv_catpvs(sv, "{loc}");
- if (flags & ANYOF_FOLD)
- sv_catpvs(sv, "{i}");
- Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]);
- if (flags & ANYOF_INVERT)
- sv_catpvs(sv, "^");
-
- /* output what the standard cp 0-255 bitmap matches */
- for (i = 0; i <= 256; i++) {
- if (i < 256 && ANYOF_BITMAP_TEST(o,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- do_sep = 1;
- rangestart = -1;
- }
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
- /* output any special charclass tests (used mostly under use locale) */
- if (o->flags & ANYOF_CLASS)
- for (i = 0; i < (int)(sizeof(anyofs)/sizeof(char*)); i++)
- if (ANYOF_CLASS_TEST(o,i)) {
- sv_catpv(sv, anyofs[i]);
- do_sep = 1;
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
-
- /* output information about the unicode matching */
- if (flags & ANYOF_UNICODE)
- sv_catpvs(sv, "{unicode}");
- else if (flags & ANYOF_UNICODE_ALL)
- sv_catpvs(sv, "{unicode_all}");
-
- {
- SV *lv;
- SV * const sw = regclass_swash(prog, o, FALSE, &lv, 0);
-
- if (lv) {
- if (sw) {
- U8 s[UTF8_MAXBYTES_CASE+1];
-
- for (i = 0; i <= 256; i++) { /* just the first 256 */
- uvchr_to_utf8(s, i);
-
- if (i < 256 && swash_fetch(sw, s, TRUE)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++) {
- const U8 * const e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for(p = s; p < e; p++)
- put_byte(sv, *p);
- }
- else {
- const U8 *e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- sv_catpvs(sv, "-");
- e = uvchr_to_utf8(s, i-1);
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- }
- rangestart = -1;
- }
- }
-
- sv_catpvs(sv, "..."); /* et cetera */
- }
-
- {
- char *s = savesvpv(lv);
- char * const origs = s;
-
- while (*s && *s != '\n')
- s++;
-
- if (*s == '\n') {
- const char * const t = ++s;
-
- while (*s) {
- if (*s == '\n')
- *s = ' ';
- s++;
- }
- if (s[-1] == ' ')
- s[-1] = 0;
-
- sv_catpv(sv, t);
- }
-
- Safefree(origs);
- }
- }
- }
-
- Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]);
- }
- else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH))
- Perl_sv_catpvf(aTHX_ sv, "[%d]", -(o->flags));
-#else
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(sv);
- PERL_UNUSED_ARG(o);
- PERL_UNUSED_ARG(prog);
-#endif /* DEBUGGING */
-}
-
-SV *
-Perl_re_intuit_string(pTHX_ REGEXP * const r)
-{ /* Assume that RE_INTUIT is set */
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_STRING;
- PERL_UNUSED_CONTEXT;
-
- DEBUG_COMPILE_r(
- {
- const char * const s = SvPV_nolen_const(prog->check_substr
- ? prog->check_substr : prog->check_utf8);
-
- if (!PL_colorset) reginitcolors();
- PerlIO_printf(Perl_debug_log,
- "%sUsing REx %ssubstr:%s \"%s%.60s%s%s\"\n",
- PL_colors[4],
- prog->check_substr ? "" : "utf8 ",
- PL_colors[5],PL_colors[0],
- s,
- PL_colors[1],
- (strlen(s) > 60 ? "..." : ""));
- } );
-
- return prog->check_substr ? prog->check_substr : prog->check_utf8;
-}
-
-/*
- pregfree()
-
- handles refcounting and freeing the perl core regexp structure. When
- it is necessary to actually free the structure the first thing it
- does is call the 'free' method of the regexp_engine associated to to
- the regexp, allowing the handling of the void *pprivate; member
- first. (This routine is not overridable by extensions, which is why
- the extensions free is called first.)
-
- See regdupe and regdupe_internal if you change anything here.
-*/
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_pregfree(pTHX_ REGEXP *r)
-{
- SvREFCNT_dec(r);
-}
-
-void
-Perl_pregfree2(pTHX_ REGEXP *rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_PREGFREE2;
-
- if (r->mother_re) {
- ReREFCNT_dec(r->mother_re);
- } else {
- CALLREGFREE_PVT(rx); /* free the private data */
- SvREFCNT_dec(RXp_PAREN_NAMES(r));
- }
- if (r->substrs) {
- SvREFCNT_dec(r->anchored_substr);
- SvREFCNT_dec(r->anchored_utf8);
- SvREFCNT_dec(r->float_substr);
- SvREFCNT_dec(r->float_utf8);
- Safefree(r->substrs);
- }
- RX_MATCH_COPY_FREE(rx);
-#ifdef PERL_OLD_COPY_ON_WRITE
- SvREFCNT_dec(r->saved_copy);
-#endif
- Safefree(r->offs);
-}
-
-/* reg_temp_copy()
-
- This is a hacky workaround to the structural issue of match results
- being stored in the regexp structure which is in turn stored in
- PL_curpm/PL_reg_curpm. The problem is that due to qr// the pattern
- could be PL_curpm in multiple contexts, and could require multiple
- result sets being associated with the pattern simultaneously, such
- as when doing a recursive match with (??{$qr})
-
- The solution is to make a lightweight copy of the regexp structure
- when a qr// is returned from the code executed by (??{$qr}) this
- lightweight copy doesnt actually own any of its data except for
- the starp/end and the actual regexp structure itself.
-
-*/
-
-
-REGEXP *
-Perl_reg_temp_copy (pTHX_ REGEXP *ret_x, REGEXP *rx)
-{
- struct regexp *ret;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- register const I32 npar = r->nparens+1;
-
- PERL_ARGS_ASSERT_REG_TEMP_COPY;
-
- if (!ret_x)
- ret_x = (REGEXP*) newSV_type(SVt_REGEXP);
- ret = (struct regexp *)SvANY(ret_x);
-
- (void)ReREFCNT_inc(rx);
- /* We can take advantage of the existing "copied buffer" mechanism in SVs
- by pointing directly at the buffer, but flagging that the allocated
- space in the copy is zero. As we've just done a struct copy, it's now
- a case of zero-ing that, rather than copying the current length. */
- SvPV_set(ret_x, RX_WRAPPED(rx));
- SvFLAGS(ret_x) |= SvFLAGS(rx) & (SVf_POK|SVp_POK|SVf_UTF8);
- memcpy(&(ret->xpv_cur), &(r->xpv_cur),
- sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur));
- SvLEN_set(ret_x, 0);
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if (r->substrs) {
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- SvREFCNT_inc_void(ret->anchored_substr);
- SvREFCNT_inc_void(ret->anchored_utf8);
- SvREFCNT_inc_void(ret->float_substr);
- SvREFCNT_inc_void(ret->float_utf8);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
- }
- RX_MATCH_COPIED_off(ret_x);
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
- ret->mother_re = rx;
-
- return ret_x;
-}
-#endif
-
-/* regfree_internal()
-
- Free the private data in a regexp. This is overloadable by
- extensions. Perl takes care of the regexp structure in pregfree(),
- this covers the *pprivate pointer which technically perldoesnt
- know about, however of course we have to handle the
- regexp_internal structure when no extension is in use.
-
- Note this is called before freeing anything in the regexp
- structure.
- */
-
-void
-Perl_regfree_internal(pTHX_ REGEXP * const rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGFREE_INTERNAL;
-
- DEBUG_COMPILE_r({
- if (!PL_colorset)
- reginitcolors();
- {
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RX_UTF8(rx),
- dsv, RX_PRECOMP(rx), RX_PRELEN(rx), 60);
- PerlIO_printf(Perl_debug_log,"%sFreeing REx:%s %s\n",
- PL_colors[4],PL_colors[5],s);
- }
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets)
- Safefree(ri->u.offsets); /* 20010421 MJD */
-#endif
- if (ri->data) {
- int n = ri->data->count;
- PAD* new_comppad = NULL;
- PAD* old_comppad;
- PADOFFSET refcnt;
-
- while (--n >= 0) {
- /* If you add a ->what type here, update the comment in regcomp.h */
- switch (ri->data->what[n]) {
- case 's':
- case 'S':
- case 'u':
- SvREFCNT_dec(MUTABLE_SV(ri->data->data[n]));
- break;
- case 'f':
- Safefree(ri->data->data[n]);
- break;
- case 'p':
- new_comppad = MUTABLE_AV(ri->data->data[n]);
- break;
- case 'o':
- if (new_comppad == NULL)
- Perl_croak(aTHX_ "panic: pregfree comppad");
- PAD_SAVE_LOCAL(old_comppad,
- /* Watch out for global destruction's random ordering. */
- (SvTYPE(new_comppad) == SVt_PVAV) ? new_comppad : NULL
- );
- OP_REFCNT_LOCK;
- refcnt = OpREFCNT_dec((OP_4tree*)ri->data->data[n]);
- OP_REFCNT_UNLOCK;
- if (!refcnt)
- op_free((OP_4tree*)ri->data->data[n]);
-
- PAD_RESTORE_LOCAL(old_comppad);
- SvREFCNT_dec(MUTABLE_SV(new_comppad));
- new_comppad = NULL;
- break;
- case 'n':
- break;
- case 'T':
- { /* Aho Corasick add-on structure for a trie node.
- Used in stclass optimization only */
- U32 refcount;
- reg_ac_data *aho=(reg_ac_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --aho->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(aho->states);
- PerlMemShared_free(aho->fail);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- PerlMemShared_free(ri->regstclass);
- }
- }
- break;
- case 't':
- {
- /* trie structure. */
- U32 refcount;
- reg_trie_data *trie=(reg_trie_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --trie->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(trie->charmap);
- PerlMemShared_free(trie->states);
- PerlMemShared_free(trie->trans);
- if (trie->bitmap)
- PerlMemShared_free(trie->bitmap);
- if (trie->wordlen)
- PerlMemShared_free(trie->wordlen);
- if (trie->jump)
- PerlMemShared_free(trie->jump);
- if (trie->nextword)
- PerlMemShared_free(trie->nextword);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- }
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: regfree data code '%c'", ri->data->what[n]);
- }
- }
- Safefree(ri->data->what);
- Safefree(ri->data);
- }
-
- Safefree(ri);
-}
-
-#define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
-#define av_dup_inc(s,t) MUTABLE_AV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define hv_dup_inc(s,t) MUTABLE_HV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define SAVEPVN(p,n) ((p) ? savepvn(p,n) : NULL)
-
-/*
- re_dup - duplicate a regexp.
-
- This routine is expected to clone a given regexp structure. It is only
- compiled under USE_ITHREADS.
-
- After all of the core data stored in struct regexp is duplicated
- the regexp_engine.dupe method is used to copy any private data
- stored in the *pprivate pointer. This allows extensions to handle
- any duplication it needs to do.
-
- See pregfree() and regfree_internal() if you change anything here.
-*/
-#if defined(USE_ITHREADS)
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_re_dup_guts(pTHX_ const REGEXP *sstr, REGEXP *dstr, CLONE_PARAMS *param)
-{
- dVAR;
- I32 npar;
- const struct regexp *r = (const struct regexp *)SvANY(sstr);
- struct regexp *ret = (struct regexp *)SvANY(dstr);
-
- PERL_ARGS_ASSERT_RE_DUP_GUTS;
-
- npar = r->nparens+1;
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if(ret->swap) {
- /* no need to copy these */
- Newx(ret->swap, npar, regexp_paren_pair);
- }
-
- if (ret->substrs) {
- /* Do it this way to avoid reading from *r after the StructCopy().
- That way, if any of the sv_dup_inc()s dislodge *r from the L1
- cache, it doesn't matter. */
- const bool anchored = r->check_substr
- ? r->check_substr == r->anchored_substr
- : r->check_utf8 == r->anchored_utf8;
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- ret->anchored_substr = sv_dup_inc(ret->anchored_substr, param);
- ret->anchored_utf8 = sv_dup_inc(ret->anchored_utf8, param);
- ret->float_substr = sv_dup_inc(ret->float_substr, param);
- ret->float_utf8 = sv_dup_inc(ret->float_utf8, param);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
-
- if (ret->check_substr) {
- if (anchored) {
- assert(r->check_utf8 == r->anchored_utf8);
- ret->check_substr = ret->anchored_substr;
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- assert(r->check_substr == r->float_substr);
- assert(r->check_utf8 == r->float_utf8);
- ret->check_substr = ret->float_substr;
- ret->check_utf8 = ret->float_utf8;
- }
- } else if (ret->check_utf8) {
- if (anchored) {
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- ret->check_utf8 = ret->float_utf8;
- }
- }
- }
-
- RXp_PAREN_NAMES(ret) = hv_dup_inc(RXp_PAREN_NAMES(ret), param);
-
- if (ret->pprivate)
- RXi_SET(ret,CALLREGDUPE_PVT(dstr,param));
-
- if (RX_MATCH_COPIED(dstr))
- ret->subbeg = SAVEPVN(ret->subbeg, ret->sublen);
- else
- ret->subbeg = NULL;
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
-
- if (ret->mother_re) {
- if (SvPVX_const(dstr) == SvPVX_const(ret->mother_re)) {
- /* Our storage points directly to our mother regexp, but that's
- 1: a buffer in a different thread
- 2: something we no longer hold a reference on
- so we need to copy it locally. */
- /* Note we need to sue SvCUR() on our mother_re, because it, in
- turn, may well be pointing to its own mother_re. */
- SvPV_set(dstr, SAVEPVN(SvPVX_const(ret->mother_re),
- SvCUR(ret->mother_re)+1));
- SvLEN_set(dstr, SvCUR(ret->mother_re)+1);
- }
- ret->mother_re = NULL;
- }
- ret->gofs = 0;
-}
-#endif /* PERL_IN_XSUB_RE */
-
-/*
- regdupe_internal()
-
- This is the internal complement to regdupe() which is used to copy
- the structure pointed to by the *pprivate pointer in the regexp.
- This is the core version of the extension overridable cloning hook.
- The regexp structure being duplicated will be copied by perl prior
- to this and will be provided as the regexp *r argument, however
- with the /old/ structures pprivate pointer value. Thus this routine
- may override any copying normally done by perl.
-
- It returns a pointer to the new regexp_internal structure.
-*/
-
-void *
-Perl_regdupe_internal(pTHX_ REGEXP * const rx, CLONE_PARAMS *param)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- regexp_internal *reti;
- int len, npar;
- RXi_GET_DECL(r,ri);
-
- PERL_ARGS_ASSERT_REGDUPE_INTERNAL;
-
- npar = r->nparens+1;
- len = ProgLen(ri);
-
- Newxc(reti, sizeof(regexp_internal) + len*sizeof(regnode), char, regexp_internal);
- Copy(ri->program, reti->program, len+1, regnode);
-
-
- reti->regstclass = NULL;
-
- if (ri->data) {
- struct reg_data *d;
- const int count = ri->data->count;
- int i;
-
- Newxc(d, sizeof(struct reg_data) + count*sizeof(void *),
- char, struct reg_data);
- Newx(d->what, count, U8);
-
- d->count = count;
- for (i = 0; i < count; i++) {
- d->what[i] = ri->data->what[i];
- switch (d->what[i]) {
- /* legal options are one of: sSfpontTu
- see also regcomp.h and pregfree() */
- case 's':
- case 'S':
- case 'p': /* actually an AV, but the dup function is identical. */
- case 'u': /* actually an HV, but the dup function is identical. */
- d->data[i] = sv_dup_inc((const SV *)ri->data->data[i], param);
- break;
- case 'f':
- /* This is cheating. */
- Newx(d->data[i], 1, struct regnode_charclass_class);
- StructCopy(ri->data->data[i], d->data[i],
- struct regnode_charclass_class);
- reti->regstclass = (regnode*)d->data[i];
- break;
- case 'o':
- /* Compiled op trees are readonly and in shared memory,
- and can thus be shared without duplication. */
- OP_REFCNT_LOCK;
- d->data[i] = (void*)OpREFCNT_inc((OP*)ri->data->data[i]);
- OP_REFCNT_UNLOCK;
- break;
- case 'T':
- /* Trie stclasses are readonly and can thus be shared
- * without duplication. We free the stclass in pregfree
- * when the corresponding reg_ac_data struct is freed.
- */
- reti->regstclass= ri->regstclass;
- /* Fall through */
- case 't':
- OP_REFCNT_LOCK;
- ((reg_trie_data*)ri->data->data[i])->refcount++;
- OP_REFCNT_UNLOCK;
- /* Fall through */
- case 'n':
- d->data[i] = ri->data->data[i];
- break;
- default:
- Perl_croak(aTHX_ "panic: re_dup unknown data code '%c'", ri->data->what[i]);
- }
- }
-
- reti->data = d;
- }
- else
- reti->data = NULL;
-
- reti->name_list_idx = ri->name_list_idx;
-
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets) {
- Newx(reti->u.offsets, 2*len+1, U32);
- Copy(ri->u.offsets, reti->u.offsets, 2*len+1, U32);
- }
-#else
- SetProgLen(reti,len);
-#endif
-
- return (void*)reti;
-}
-
-#endif /* USE_ITHREADS */
-
-#ifndef PERL_IN_XSUB_RE
-
-/*
- - regnext - dig the "next" pointer out of a node
- */
-regnode *
-Perl_regnext(pTHX_ register regnode *p)
-{
- dVAR;
- register I32 offset;
-
- if (!p)
- return(NULL);
-
- offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p));
- if (offset == 0)
- return(NULL);
-
- return(p+offset);
-}
-#endif
-
-STATIC void
-S_re_croak2(pTHX_ const char* pat1,const char* pat2,...)
-{
- va_list args;
- STRLEN l1 = strlen(pat1);
- STRLEN l2 = strlen(pat2);
- char buf[512];
- SV *msv;
- const char *message;
-
- PERL_ARGS_ASSERT_RE_CROAK2;
-
- if (l1 > 510)
- l1 = 510;
- if (l1 + l2 > 510)
- l2 = 510 - l1;
- Copy(pat1, buf, l1 , char);
- Copy(pat2, buf + l1, l2 , char);
- buf[l1 + l2] = '\n';
- buf[l1 + l2 + 1] = '\0';
-#ifdef I_STDARG
- /* ANSI variant takes additional second argument */
- va_start(args, pat2);
-#else
- va_start(args);
-#endif
- msv = vmess(buf, &args);
- va_end(args);
- message = SvPV_const(msv,l1);
- if (l1 > 512)
- l1 = 512;
- Copy(message, buf, l1 , char);
- buf[l1-1] = '\0'; /* Overwrite \n */
- Perl_croak(aTHX_ "%s", buf);
-}
-
-/* XXX Here's a total kludge. But we need to re-enter for swash routines. */
-
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_save_re_context(pTHX)
-{
- dVAR;
-
- struct re_save_state *state;
-
- SAVEVPTR(PL_curcop);
- SSGROW(SAVESTACK_ALLOC_FOR_RE_SAVE_STATE + 1);
-
- state = (struct re_save_state *)(PL_savestack + PL_savestack_ix);
- PL_savestack_ix += SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
- SSPUSHINT(SAVEt_RE_STATE);
-
- Copy(&PL_reg_state, state, 1, struct re_save_state);
-
- PL_reg_start_tmp = 0;
- PL_reg_start_tmpl = 0;
- PL_reg_oldsaved = NULL;
- PL_reg_oldsavedlen = 0;
- PL_reg_maxiter = 0;
- PL_reg_leftiter = 0;
- PL_reg_poscache = NULL;
- PL_reg_poscache_size = 0;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = NULL;
-#endif
-
- /* Save $1..$n (#18107: UTF-8 s/(\w+)/uc($1)/e); AMS 20021106. */
- if (PL_curpm) {
- const REGEXP * const rx = PM_GETRE(PL_curpm);
- if (rx) {
- U32 i;
- for (i = 1; i <= RX_NPARENS(rx); i++) {
- char digits[TYPE_CHARS(long)];
- const STRLEN len = my_snprintf(digits, sizeof(digits), "%lu", (long)i);
- GV *const *const gvp
- = (GV**)hv_fetch(PL_defstash, digits, len, 0);
-
- if (gvp) {
- GV * const gv = *gvp;
- if (SvTYPE(gv) == SVt_PVGV && GvSV(gv))
- save_scalar(gv);
- }
- }
- }
- }
-}
-#endif
-
-static void
-clear_re(pTHX_ void *r)
-{
- dVAR;
- ReREFCNT_dec((REGEXP *)r);
-}
-
-#ifdef DEBUGGING
-
-STATIC void
-S_put_byte(pTHX_ SV *sv, int c)
-{
- PERL_ARGS_ASSERT_PUT_BYTE;
-
- /* Our definition of isPRINT() ignores locales, so only bytes that are
- not part of UTF-8 are considered printable. I assume that the same
- holds for UTF-EBCDIC.
- Also, code point 255 is not printable in either (it's E0 in EBCDIC,
- which Wikipedia says:
-
- EO, or Eight Ones, is an 8-bit EBCDIC character code represented as all
- ones (binary 1111 1111, hexadecimal FF). It is similar, but not
- identical, to the ASCII delete (DEL) or rubout control character.
- ) So the old condition can be simplified to !isPRINT(c) */
- if (!isPRINT(c))
- Perl_sv_catpvf(aTHX_ sv, "\\%o", c);
- else {
- const char string = c;
- if (c == '-' || c == ']' || c == '\\' || c == '^')
- sv_catpvs(sv, "\\");
- sv_catpvn(sv, &string, 1);
- }
-}
-
-
-#define CLEAR_OPTSTART \
- if (optstart) STMT_START { \
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log, " (%"IVdf" nodes)\n", (IV)(node - optstart))); \
- optstart=NULL; \
- } STMT_END
-
-#define DUMPUNTIL(b,e) CLEAR_OPTSTART; node=dumpuntil(r,start,(b),(e),last,sv,indent+1,depth+1);
-
-STATIC const regnode *
-S_dumpuntil(pTHX_ const regexp *r, const regnode *start, const regnode *node,
- const regnode *last, const regnode *plast,
- SV* sv, I32 indent, U32 depth)
-{
- dVAR;
- register U8 op = PSEUDO; /* Arbitrary non-END op. */
- register const regnode *next;
- const regnode *optstart= NULL;
-
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMPUNTIL;
-
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d : %d - %d - %d\n",indent,node-start,
- last ? last-start : 0,plast ? plast-start : 0);
-#endif
-
- if (plast && plast < last)
- last= plast;
-
- while (PL_regkind[op] != END && (!last || node < last)) {
- /* While that wasn't END last time... */
- NODE_ALIGN(node);
- op = OP(node);
- if (op == CLOSE || op == WHILEM)
- indent--;
- next = regnext((regnode *)node);
-
- /* Where, what. */
- if (OP(node) == OPTIMIZED) {
- if (!optstart && RE_DEBUG_FLAG(RE_DEBUG_COMPILE_OPTIMISE))
- optstart = node;
- else
- goto after_print;
- } else
- CLEAR_OPTSTART;
-
- regprop(r, sv, node);
- PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start),
- (int)(2*indent + 1), "", SvPVX_const(sv));
-
- if (OP(node) != OPTIMIZED) {
- if (next == NULL) /* Next ptr. */
- PerlIO_printf(Perl_debug_log, " (0)");
- else if (PL_regkind[(U8)op] == BRANCH && PL_regkind[OP(next)] != BRANCH )
- PerlIO_printf(Perl_debug_log, " (FAIL)");
- else
- PerlIO_printf(Perl_debug_log, " (%"IVdf")", (IV)(next - start));
- (void)PerlIO_putc(Perl_debug_log, '\n');
- }
-
- after_print:
- if (PL_regkind[(U8)op] == BRANCHJ) {
- assert(next);
- {
- register const regnode *nnode = (OP(next) == LONGJMP
- ? regnext((regnode *)next)
- : next);
- if (last && nnode > last)
- nnode = last;
- DUMPUNTIL(NEXTOPER(NEXTOPER(node)), nnode);
- }
- }
- else if (PL_regkind[(U8)op] == BRANCH) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node), next);
- }
- else if ( PL_regkind[(U8)op] == TRIE ) {
- const regnode *this_trie = node;
- const char op = OP(node);
- const U32 n = ARG(node);
- const reg_ac_data * const ac = op>=AHOCORASICK ?
- (reg_ac_data *)ri->data->data[n] :
- NULL;
- const reg_trie_data * const trie =
- (reg_trie_data*)ri->data->data[op<AHOCORASICK ? n : ac->trie];
-#ifdef DEBUGGING
- AV *const trie_words = MUTABLE_AV(ri->data->data[n + TRIE_WORDS_OFFSET]);
-#endif
- const regnode *nextbranch= NULL;
- I32 word_idx;
- sv_setpvs(sv, "");
- for (word_idx= 0; word_idx < (I32)trie->wordcount; word_idx++) {
- SV ** const elem_ptr = av_fetch(trie_words,word_idx,0);
-
- PerlIO_printf(Perl_debug_log, "%*s%s ",
- (int)(2*(indent+3)), "",
- elem_ptr ? pv_pretty(sv, SvPV_nolen_const(*elem_ptr), SvCUR(*elem_ptr), 60,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*elem_ptr) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT
- )
- : "???"
- );
- if (trie->jump) {
- U16 dist= trie->jump[word_idx+1];
- PerlIO_printf(Perl_debug_log, "(%"UVuf")\n",
- (UV)((dist ? this_trie + dist : next) - start));
- if (dist) {
- if (!nextbranch)
- nextbranch= this_trie + trie->jump[0];
- DUMPUNTIL(this_trie + dist, nextbranch);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode *)nextbranch);
- } else {
- PerlIO_printf(Perl_debug_log, "\n");
- }
- }
- if (last && next > last)
- node= last;
- else
- node= next;
- }
- else if ( op == CURLY ) { /* "next" might be very big: optimizer */
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS,
- NEXTOPER(node) + EXTRA_STEP_2ARGS + 1);
- }
- else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, next);
- }
- else if ( op == PLUS || op == STAR) {
- DUMPUNTIL(NEXTOPER(node), NEXTOPER(node) + 1);
- }
- else if (op == ANYOF) {
- /* arglen 1 + class block */
- node += 1 + ((ANYOF_FLAGS(node) & ANYOF_LARGE)
- ? ANYOF_CLASS_SKIP : ANYOF_SKIP);
- node = NEXTOPER(node);
- }
- else if (PL_regkind[(U8)op] == EXACT) {
- /* Literal string, where present. */
- node += NODE_SZ_STR(node) - 1;
- node = NEXTOPER(node);
- }
- else {
- node = NEXTOPER(node);
- node += regarglen[(U8)op];
- }
- if (op == CURLYX || op == OPEN)
- indent++;
- }
- CLEAR_OPTSTART;
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d\n", (int)indent);
-#endif
- return node;
-}
-
-#endif /* DEBUGGING */
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regexec.c
- */
-
-/*
- * One Ring to rule them all, One Ring to find them
- &
- * [p.v of _The Lord of the Rings_, opening poem]
- * [p.50 of _The Lord of the Rings_, I/iii: "The Shadow of the Past"]
- * [p.254 of _The Lord of the Rings_, II/ii: "The Council of Elrond"]
- */
-
-/* This file contains functions for executing a regular expression. See
- * also regcomp.c which funnily enough, contains functions for compiling
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_exec.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGEXEC_C
-#include "perl.h"
-#include "re_defs.h"
-
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#define RF_tainted 1 /* tainted information used? */
-#define RF_warned 2 /* warned about big count? */
-
-#define RF_utf8 8 /* Pattern contains multibyte chars? */
-
-#define UTF ((PL_reg_flags & RF_utf8) != 0)
-
-#define RS_init 1 /* eval environment created */
-#define RS_set 2 /* replsv value is set */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-#define REGINCLASS(prog,p,c) (ANYOF_FLAGS(p) ? reginclass(prog,p,c,0,0) : ANYOF_BITMAP_TEST(p,*(c)))
-
-/*
- * Forwards.
- */
-
-#define CHR_SVLEN(sv) (do_utf8 ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (PL_reg_match_utf8 ? utf8_distance(a,b) : a - b)
-
-#define HOPc(pos,off) \
- (char *)(PL_reg_match_utf8 \
- ? reghop3((U8*)pos, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)) \
- : (U8*)(pos + off))
-#define HOPBACKc(pos, off) \
- (char*)(PL_reg_match_utf8\
- ? reghopmaybe3((U8*)pos, -off, (U8*)PL_bostr) \
- : (pos - off >= PL_bostr) \
- ? (U8*)pos - off \
- : NULL)
-
-#define HOP3(pos,off,lim) (PL_reg_match_utf8 ? reghop3((U8*)(pos), off, (U8*)(lim)) : (U8*)(pos + off))
-#define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim))
-
-/* these are unrolled below in the CCC_TRY_XXX defined */
-#define LOAD_UTF8_CHARCLASS(class,str) STMT_START { \
- if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)str); assert(ok); LEAVE; } } STMT_END
-
-/* Doesn't do an assert to verify that is correct */
-#define LOAD_UTF8_CHARCLASS_NO_CHECK(class) STMT_START { \
- if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)" "); LEAVE; } } STMT_END
-
-#define LOAD_UTF8_CHARCLASS_ALNUM() LOAD_UTF8_CHARCLASS(alnum,"a")
-#define LOAD_UTF8_CHARCLASS_DIGIT() LOAD_UTF8_CHARCLASS(digit,"0")
-#define LOAD_UTF8_CHARCLASS_SPACE() LOAD_UTF8_CHARCLASS(space," ")
-
-#define LOAD_UTF8_CHARCLASS_GCB() /* Grapheme cluster boundaries */ \
- LOAD_UTF8_CHARCLASS(X_begin, " "); \
- LOAD_UTF8_CHARCLASS(X_non_hangul, "A"); \
- /* These are utf8 constants, and not utf-ebcdic constants, so the \
- * assert should likely and hopefully fail on an EBCDIC machine */ \
- LOAD_UTF8_CHARCLASS(X_extend, "\xcc\x80"); /* U+0300 */ \
- \
- /* No asserts are done for these, in case called on an early \
- * Unicode version in which they map to nothing */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_prepend);/* U+0E40 "\xe0\xb9\x80" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_L); /* U+1100 "\xe1\x84\x80" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_LV); /* U+AC00 "\xea\xb0\x80" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_LVT); /* U+AC01 "\xea\xb0\x81" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_LV_LVT_V);/* U+AC01 "\xea\xb0\x81" */\
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_T); /* U+11A8 "\xe1\x86\xa8" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_V) /* U+1160 "\xe1\x85\xa0" */
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS_ALNUM()
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS_SPACE()
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS_DIGIT()
-#define RE_utf8_perl_word PL_utf8_alnum
-#define RE_utf8_perl_space PL_utf8_space
-#define RE_utf8_posix_digit PL_utf8_digit
-#define perl_word alnum
-#define perl_space space
-#define posix_digit digit
-#else
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS(perl_word,"a")
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS(perl_space," ")
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS(posix_digit,"0")
-#define RE_utf8_perl_word PL_utf8_perl_word
-#define RE_utf8_perl_space PL_utf8_perl_space
-#define RE_utf8_posix_digit PL_utf8_posix_digit
-#endif
-
-
-#define CCC_TRY_AFF(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME: \
- if (!nextchr) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if (!(OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if (!(OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-#define CCC_TRY_NEG(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME : \
- if (!nextchr && locinput >= PL_regeol) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if ((OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if ((OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-
-
-
-
-/* TODO: Combine JUMPABLE and HAS_TEXT to cache OP(rn) */
-
-/* for use after a quantifier and before an EXACT-like node -- japhy */
-/* it would be nice to rework regcomp.sym to generate this stuff. sigh */
-#define JUMPABLE(rn) ( \
- OP(rn) == OPEN || \
- (OP(rn) == CLOSE && (!cur_eval || cur_eval->u.eval.close_paren != ARG(rn))) || \
- OP(rn) == EVAL || \
- OP(rn) == SUSPEND || OP(rn) == IFMATCH || \
- OP(rn) == PLUS || OP(rn) == MINMOD || \
- OP(rn) == KEEPS || (PL_regkind[OP(rn)] == VERB) || \
- (PL_regkind[OP(rn)] == CURLY && ARG1(rn) > 0) \
-)
-#define IS_EXACT(rn) (PL_regkind[OP(rn)] == EXACT)
-
-#define HAS_TEXT(rn) ( IS_EXACT(rn) || PL_regkind[OP(rn)] == REF )
-
-#if 0
-/* Currently these are only used when PL_regkind[OP(rn)] == EXACT so
- we don't need this definition. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT || OP(rn)==REF || OP(rn)==NREF )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF || OP(rn)==REFF || OP(rn)==NREFF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL || OP(rn)==REFFL || OP(rn)==NREFFL )
-
-#else
-/* ... so we use this as its faster. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL )
-
-#endif
-
-/*
- Search for mandatory following text node; for lookahead, the text must
- follow but for lookbehind (rn->flags != 0) we skip to the next step.
-*/
-#define FIND_NEXT_IMPT(rn) STMT_START { \
- while (JUMPABLE(rn)) { \
- const OPCODE type = OP(rn); \
- if (type == SUSPEND || PL_regkind[type] == CURLY) \
- rn = NEXTOPER(NEXTOPER(rn)); \
- else if (type == PLUS) \
- rn = NEXTOPER(rn); \
- else if (type == IFMATCH) \
- rn = (rn->flags == 0) ? NEXTOPER(NEXTOPER(rn)) : rn + ARG(rn); \
- else rn += NEXT_OFF(rn); \
- } \
-} STMT_END
-
-
-static void restore_pos(pTHX_ void *arg);
-
-STATIC CHECKPOINT
-S_regcppush(pTHX_ I32 parenfloor)
-{
- dVAR;
- const int retval = PL_savestack_ix;
-#define REGCP_PAREN_ELEMS 4
- const int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS;
- int p;
- GET_RE_DEBUG_FLAGS_DECL;
-
- if (paren_elems_to_push < 0)
- Perl_croak(aTHX_ "panic: paren_elems_to_push < 0");
-
-#define REGCP_OTHER_ELEMS 7
- SSGROW(paren_elems_to_push + REGCP_OTHER_ELEMS);
-
- for (p = PL_regsize; p > parenfloor; p--) {
-/* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */
- SSPUSHINT(PL_regoffs[p].end);
- SSPUSHINT(PL_regoffs[p].start);
- SSPUSHPTR(PL_reg_start_tmp[p]);
- SSPUSHINT(p);
- DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log,
- " saving \\%"UVuf" %"IVdf"(%"IVdf")..%"IVdf"\n",
- (UV)p, (IV)PL_regoffs[p].start,
- (IV)(PL_reg_start_tmp[p] - PL_bostr),
- (IV)PL_regoffs[p].end
- ));
- }
-/* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */
- SSPUSHPTR(PL_regoffs);
- SSPUSHINT(PL_regsize);
- SSPUSHINT(*PL_reglastparen);
- SSPUSHINT(*PL_reglastcloseparen);
- SSPUSHPTR(PL_reginput);
-#define REGCP_FRAME_ELEMS 2
-/* REGCP_FRAME_ELEMS are part of the REGCP_OTHER_ELEMS and
- * are needed for the regexp context stack bookkeeping. */
- SSPUSHINT(paren_elems_to_push + REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- SSPUSHINT(SAVEt_REGCONTEXT); /* Magic cookie. */
-
- return retval;
-}
-
-/* These are needed since we do not localize EVAL nodes: */
-#define REGCP_SET(cp) \
- DEBUG_STATE_r( \
- PerlIO_printf(Perl_debug_log, \
- " Setting an EVAL scope, savestack=%"IVdf"\n", \
- (IV)PL_savestack_ix)); \
- cp = PL_savestack_ix
-
-#define REGCP_UNWIND(cp) \
- DEBUG_STATE_r( \
- if (cp != PL_savestack_ix) \
- PerlIO_printf(Perl_debug_log, \
- " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \
- (IV)(cp), (IV)PL_savestack_ix)); \
- regcpblow(cp)
-
-STATIC char *
-S_regcppop(pTHX_ const regexp *rex)
-{
- dVAR;
- U32 i;
- char *input;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCPPOP;
-
- /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */
- i = SSPOPINT;
- assert(i == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */
- i = SSPOPINT; /* Parentheses elements to pop. */
- input = (char *) SSPOPPTR;
- *PL_reglastcloseparen = SSPOPINT;
- *PL_reglastparen = SSPOPINT;
- PL_regsize = SSPOPINT;
- PL_regoffs=(regexp_paren_pair *) SSPOPPTR;
-
-
- /* Now restore the parentheses context. */
- for (i -= (REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- i > 0; i -= REGCP_PAREN_ELEMS) {
- I32 tmps;
- U32 paren = (U32)SSPOPINT;
- PL_reg_start_tmp[paren] = (char *) SSPOPPTR;
- PL_regoffs[paren].start = SSPOPINT;
- tmps = SSPOPINT;
- if (paren <= *PL_reglastparen)
- PL_regoffs[paren].end = tmps;
- DEBUG_BUFFERS_r(
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n",
- (UV)paren, (IV)PL_regoffs[paren].start,
- (IV)(PL_reg_start_tmp[paren] - PL_bostr),
- (IV)PL_regoffs[paren].end,
- (paren > *PL_reglastparen ? "(no)" : ""));
- );
- }
- DEBUG_BUFFERS_r(
- if (*PL_reglastparen + 1 <= rex->nparens) {
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"IVdf"..\\%"IVdf" to undef\n",
- (IV)(*PL_reglastparen + 1), (IV)rex->nparens);
- }
- );
-#if 1
- /* It would seem that the similar code in regtry()
- * already takes care of this, and in fact it is in
- * a better location to since this code can #if 0-ed out
- * but the code in regtry() is needed or otherwise tests
- * requiring null fields (pat.t#187 and split.t#{13,14}
- * (as of patchlevel 7877) will fail. Then again,
- * this code seems to be necessary or otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * --jhi updated by dapm */
- for (i = *PL_reglastparen + 1; i <= rex->nparens; i++) {
- if (i > PL_regsize)
- PL_regoffs[i].start = -1;
- PL_regoffs[i].end = -1;
- }
-#endif
- return input;
-}
-
-#define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */
-
-/*
- * pregexec and friends
- */
-
-#ifndef PERL_IN_XSUB_RE
-/*
- - pregexec - match a regexp against a string
- */
-I32
-Perl_pregexec(pTHX_ REGEXP * const prog, char* stringarg, register char *strend,
- char *strbeg, I32 minend, SV *screamer, U32 nosave)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* nosave: For optimizations. */
-{
- PERL_ARGS_ASSERT_PREGEXEC;
-
- return
- regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL,
- nosave ? 0 : REXEC_COPY_STR);
-}
-#endif
-
-/*
- * Need to implement the following flags for reg_anch:
- *
- * USE_INTUIT_NOML - Useful to call re_intuit_start() first
- * USE_INTUIT_ML
- * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer
- * INTUIT_AUTORITATIVE_ML
- * INTUIT_ONCE_NOML - Intuit can match in one location only.
- * INTUIT_ONCE_ML
- *
- * Another flag for this function: SECOND_TIME (so that float substrs
- * with giant delta may be not rechecked).
- */
-
-/* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */
-
-/* If SCREAM, then SvPVX_const(sv) should be compatible with strpos and strend.
- Otherwise, only SvCUR(sv) is used to get strbeg. */
-
-/* XXXX We assume that strpos is strbeg unless sv. */
-
-/* XXXX Some places assume that there is a fixed substring.
- An update may be needed if optimizer marks as "INTUITable"
- RExen without fixed substrings. Similarly, it is assumed that
- lengths of all the strings are no more than minlen, thus they
- cannot come from lookahead.
- (Or minlen should take into account lookahead.)
- NOTE: Some of this comment is not correct. minlen does now take account
- of lookahead/behind. Further research is required. -- demerphq
-
-*/
-
-/* A failure to find a constant substring means that there is no need to make
- an expensive call to REx engine, thus we celebrate a failure. Similarly,
- finding a substring too deep into the string means that less calls to
- regtry() should be needed.
-
- REx compiler's optimizer found 4 possible hints:
- a) Anchored substring;
- b) Fixed substring;
- c) Whether we are anchored (beginning-of-line or \G);
- d) First node (of those at offset 0) which may distingush positions;
- We use a)b)d) and multiline-part of c), and try to find a position in the
- string which does not contradict any of them.
- */
-
-/* Most of decisions we do here should have been done at compile time.
- The nodes of the REx which we used for the search should have been
- deleted from the finite automaton. */
-
-char *
-Perl_re_intuit_start(pTHX_ REGEXP * const rx, SV *sv, char *strpos,
- char *strend, const U32 flags, re_scream_pos_data *data)
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- register I32 start_shift = 0;
- /* Should be nonnegative! */
- register I32 end_shift = 0;
- register char *s;
- register SV *check;
- char *strbeg;
- char *t;
- const bool do_utf8 = (sv && SvUTF8(sv)) ? 1 : 0; /* if no sv we have to assume bytes */
- I32 ml_anch;
- register char *other_last = NULL; /* other substr checked before this */
- char *check_at = NULL; /* check substr found at this pos */
- const I32 multiline = prog->extflags & RXf_PMf_MULTILINE;
- RXi_GET_DECL(prog,progi);
-#ifdef DEBUGGING
- const char * const i_strpos = strpos;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_START;
-
- RX_MATCH_UTF8_set(rx,do_utf8);
-
- if (RX_UTF8(rx)) {
- PL_reg_flags |= RF_utf8;
- }
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, strpos, strend,
- sv ? "Guessing start of match in sv for"
- : "Guessing start of match in string for");
- );
-
- /* CHR_DIST() would be more correct here but it makes things slow. */
- if (prog->minlen > strend - strpos) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short... [re_intuit_start]\n"));
- goto fail;
- }
-
- strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos;
- PL_regeol = strend;
- if (do_utf8) {
- if (!prog->check_utf8 && prog->check_substr)
- to_utf8_substr(prog);
- check = prog->check_utf8;
- } else {
- if (!prog->check_substr && prog->check_utf8)
- to_byte_substr(prog);
- check = prog->check_substr;
- }
- if (check == &PL_sv_undef) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Non-utf8 string cannot match utf8 check string\n"));
- goto fail;
- }
- if (prog->extflags & RXf_ANCH) { /* Match at beg-of-str or after \n */
- ml_anch = !( (prog->extflags & RXf_ANCH_SINGLE)
- || ( (prog->extflags & RXf_ANCH_BOL)
- && !multiline ) ); /* Check after \n? */
-
- if (!ml_anch) {
- if ( !(prog->extflags & RXf_ANCH_GPOS) /* Checked by the caller */
- && !(prog->intflags & PREGf_IMPLICIT) /* not a real BOL */
- /* SvCUR is not set on references: SvRV and SvPVX_const overlap */
- && sv && !SvROK(sv)
- && (strpos != strbeg)) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not at start...\n"));
- goto fail;
- }
- if (prog->check_offset_min == prog->check_offset_max &&
- !(prog->extflags & RXf_CANY_SEEN)) {
- /* Substring at constant offset from beg-of-str... */
- I32 slen;
-
- s = HOP3c(strpos, prog->check_offset_min, strend);
-
- if (SvTAIL(check)) {
- slen = SvCUR(check); /* >= 1 */
-
- if ( strend - s > slen || strend - s < slen - 1
- || (strend - s == slen && strend[-1] != '\n')) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String too long...\n"));
- goto fail_finish;
- }
- /* Now should match s[0..slen-2] */
- slen--;
- if (slen && (*SvPVX_const(check) != *s
- || (slen > 1
- && memNE(SvPVX_const(check), s, slen)))) {
- report_neq:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String not equal...\n"));
- goto fail_finish;
- }
- }
- else if (*SvPVX_const(check) != *s
- || ((slen = SvCUR(check)) > 1
- && memNE(SvPVX_const(check), s, slen)))
- goto report_neq;
- check_at = s;
- goto success_at_start;
- }
- }
- /* Match is anchored, but substr is not anchored wrt beg-of-str. */
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- if (!ml_anch) {
- const I32 end = prog->check_offset_max + CHR_SVLEN(check)
- - (SvTAIL(check) != 0);
- const I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end;
-
- if (end_shift < eshift)
- end_shift = eshift;
- }
- }
- else { /* Can match at random position */
- ml_anch = 0;
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- /* end shift should be non negative here */
- }
-
-#ifdef QDEBUGGING /* 7/99: reports of failure (with the older version) */
- if (end_shift < 0)
- Perl_croak(aTHX_ "panic: end_shift: %"IVdf" pattern:\n%s\n ",
- (IV)end_shift, RX_PRECOMP(prog));
-#endif
-
- restart:
- /* Find a possible match in the region s..strend by looking for
- the "check" substring in the region corrected by start/end_shift. */
-
- {
- I32 srch_start_shift = start_shift;
- I32 srch_end_shift = end_shift;
- if (srch_start_shift < 0 && strbeg - s > srch_start_shift) {
- srch_end_shift -= ((strbeg - s) - srch_start_shift);
- srch_start_shift = strbeg - s;
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "Check offset min: %"IVdf" Start shift: %"IVdf" End shift %"IVdf" Real End Shift: %"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)srch_start_shift,
- (IV)srch_end_shift,
- (IV)prog->check_end_shift);
- });
-
- if (flags & REXEC_SCREAM) {
- I32 p = -1; /* Internal iterator of scream. */
- I32 * const pp = data ? data->scream_pos : &p;
-
- if (PL_screamfirst[BmRARE(check)] >= 0
- || ( BmRARE(check) == '\n'
- && (BmPREVIOUS(check) == SvCUR(check) - 1)
- && SvTAIL(check) ))
- s = screaminstr(sv, check,
- srch_start_shift + (s - strbeg), srch_end_shift, pp, 0);
- else
- goto fail_finish;
- /* we may be pointing at the wrong string */
- if (s && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- if (data)
- *data->scream_olds = s;
- }
- else {
- U8* start_point;
- U8* end_point;
- if (prog->extflags & RXf_CANY_SEEN) {
- start_point= (U8*)(s + srch_start_shift);
- end_point= (U8*)(strend - srch_end_shift);
- } else {
- start_point= HOP3(s, srch_start_shift, srch_start_shift < 0 ? strbeg : strend);
- end_point= HOP3(strend, -srch_end_shift, strbeg);
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "fbm_instr len=%d str=<%.*s>\n",
- (int)(end_point - start_point),
- (int)(end_point - start_point) > 20 ? 20 : (int)(end_point - start_point),
- start_point);
- });
-
- s = fbm_instr( start_point, end_point,
- check, multiline ? FBMrf_MULTILINE : 0);
- }
- }
- /* Update the count-of-usability, remove useless subpatterns,
- unshift s. */
-
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(check), RE_SV_DUMPLEN(check), 30);
- PerlIO_printf(Perl_debug_log, "%s %s substr %s%s%s",
- (s ? "Found" : "Did not find"),
- (check == (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)
- ? "anchored" : "floating"),
- quoted,
- RE_SV_TAIL(check),
- (s ? " at offset " : "...\n") );
- });
-
- if (!s)
- goto fail_finish;
- /* Finish the diagnostic message */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) );
-
- /* XXX dmq: first branch is for positive lookbehind...
- Our check string is offset from the beginning of the pattern.
- So we need to do any stclass tests offset forward from that
- point. I think. :-(
- */
-
-
-
- check_at=s;
-
-
- /* Got a candidate. Check MBOL anchoring, and the *other* substr.
- Start with the other substr.
- XXXX no SCREAM optimization yet - and a very coarse implementation
- XXXX /ttx+/ results in anchored="ttx", floating="x". floating will
- *always* match. Probably should be marked during compile...
- Probably it is right to do no SCREAM here...
- */
-
- if (do_utf8 ? (prog->float_utf8 && prog->anchored_utf8)
- : (prog->float_substr && prog->anchored_substr))
- {
- /* Take into account the "other" substring. */
- /* XXXX May be hopelessly wrong for UTF... */
- if (!other_last)
- other_last = strpos;
- if (check == (do_utf8 ? prog->float_utf8 : prog->float_substr)) {
- do_other_anchored:
- {
- char * const last = HOP3c(s, -start_shift, strbeg);
- char *last1, *last2;
- char * const saved_s = s;
- SV* must;
-
- t = s - prog->check_offset_max;
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -(prog->check_offset_max), (U8*)strpos))
- && t > strpos)))
- NOOP;
- else
- t = strpos;
- t = HOP3c(t, prog->anchored_offset, strend);
- if (t < other_last) /* These positions already checked */
- t = other_last;
- last2 = last1 = HOP3c(strend, -prog->minlen, strbeg);
- if (last < last1)
- last1 = last;
- /* XXXX It is not documented what units *_offsets are in.
- We assume bytes, but this is clearly wrong.
- Meaning this code needs to be carefully reviewed for errors.
- dmq.
- */
-
- /* On end-of-str: see comment below. */
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->anchored_utf8); /* for debug */
- }
- else
- s = fbm_instr(
- (unsigned char*)t,
- HOP3(HOP3(last1, prog->anchored_offset, strend)
- + SvCUR(must), -(SvTAIL(must)!=0), strbeg),
- must,
- multiline ? FBMrf_MULTILINE : 0
- );
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s anchored substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
-
-
- if (!s) {
- if (last1 >= last2) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying floating at offset %ld...\n",
- (long)(HOP3c(saved_s, 1, strend) - i_strpos)));
- other_last = HOP3c(last1, prog->anchored_offset+1, strend);
- s = HOP3c(last, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- t = HOP3c(s, -prog->anchored_offset, strbeg);
- other_last = HOP3c(s, 1, strend);
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
- else { /* Take into account the floating substring. */
- char *last, *last1;
- char * const saved_s = s;
- SV* must;
-
- t = HOP3c(s, -start_shift, strbeg);
- last1 = last =
- HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg);
- if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset)
- last = HOP3c(t, prog->float_max_offset, strend);
- s = HOP3c(t, prog->float_min_offset, strend);
- if (s < other_last)
- s = other_last;
- /* XXXX It is not documented what units *_offsets are in. Assume bytes. */
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- /* fbm_instr() takes into account exact value of end-of-str
- if the check is SvTAIL(ed). Since false positives are OK,
- and end-of-str is not later than strend we are OK. */
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->float_utf8); /* for debug message */
- }
- else
- s = fbm_instr((unsigned char*)s,
- (unsigned char*)last + SvCUR(must)
- - (SvTAIL(must)!=0),
- must, multiline ? FBMrf_MULTILINE : 0);
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s floating substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
- if (!s) {
- if (last1 == last) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying anchored starting at offset %ld...\n",
- (long)(saved_s + 1 - i_strpos)));
- other_last = last;
- s = HOP3c(t, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- other_last = s; /* Fix this later. --Hugo */
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
-
-
- t= (char*)HOP3( s, -prog->check_offset_max, (prog->check_offset_max<0) ? strend : strpos);
-
- DEBUG_OPTIMISE_MORE_r(
- PerlIO_printf(Perl_debug_log,
- "Check offset min:%"IVdf" max:%"IVdf" S:%"IVdf" t:%"IVdf" D:%"IVdf" end:%"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)prog->check_offset_max,
- (IV)(s-strpos),
- (IV)(t-strpos),
- (IV)(t-s),
- (IV)(strend-strpos)
- )
- );
-
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -prog->check_offset_max, (U8*) ((prog->check_offset_max<0) ? strend : strpos)))
- && t > strpos)))
- {
- /* Fixed substring is found far enough so that the match
- cannot start at strpos. */
- try_at_offset:
- if (ml_anch && t[-1] != '\n') {
- /* Eventually fbm_*() should handle this, but often
- anchored_offset is not 0, so this check will not be wasted. */
- /* XXXX In the code below we prefer to look for "^" even in
- presence of anchored substrings. And we search even
- beyond the found float position. These pessimizations
- are historical artefacts only. */
- find_anchor:
- while (t < strend - prog->minlen) {
- if (*t == '\n') {
- if (t < check_at - prog->check_offset_min) {
- if (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) {
- /* Since we moved from the found position,
- we definitely contradict the found anchored
- substr. Due to the above check we do not
- contradict "check" substr.
- Thus we can arrive here only if check substr
- is float. Redo checking for "other"=="fixed".
- */
- strpos = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset)));
- goto do_other_anchored;
- }
- /* We don't contradict the found floating substring. */
- /* XXXX Why not check for STCLASS? */
- s = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(s - i_strpos)));
- goto set_useful;
- }
- /* Position contradicts check-string */
- /* XXXX probably better to look for check-string
- than for "\n", so one should lower the limit for t? */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t + 1 - i_strpos)));
- other_last = strpos = s = t + 1;
- goto restart;
- }
- t++;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- goto fail_finish;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- }
- s = t;
- set_useful:
- ++BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr); /* hooray/5 */
- }
- else {
- /* The found string does not prohibit matching at strpos,
- - no optimization of calling REx engine can be performed,
- unless it was an MBOL and we are not after MBOL,
- or a future STCLASS check will fail this. */
- try_at_start:
- /* Even in this situation we may use MBOL flag if strpos is offset
- wrt the start of the string. */
- if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */
- && (strpos != strbeg) && strpos[-1] != '\n'
- /* May be due to an implicit anchor of m{.*foo} */
- && !(prog->intflags & PREGf_IMPLICIT))
- {
- t = strpos;
- goto find_anchor;
- }
- DEBUG_EXECUTE_r( if (ml_anch)
- PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n",
- (long)(strpos - i_strpos), PL_colors[0], PL_colors[1]);
- );
- success_at_start:
- if (!(prog->intflags & PREGf_NAUGHTY) /* XXXX If strpos moved? */
- && (do_utf8 ? (
- prog->check_utf8 /* Could be deleted already */
- && --BmUSEFUL(prog->check_utf8) < 0
- && (prog->check_utf8 == prog->float_utf8)
- ) : (
- prog->check_substr /* Could be deleted already */
- && --BmUSEFUL(prog->check_substr) < 0
- && (prog->check_substr == prog->float_substr)
- )))
- {
- /* If flags & SOMETHING - do not do it many times on the same match */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n"));
- /* XXX Does the destruction order has to change with do_utf8? */
- SvREFCNT_dec(do_utf8 ? prog->check_utf8 : prog->check_substr);
- SvREFCNT_dec(do_utf8 ? prog->check_substr : prog->check_utf8);
- prog->check_substr = prog->check_utf8 = NULL; /* disable */
- prog->float_substr = prog->float_utf8 = NULL; /* clear */
- check = NULL; /* abort */
- s = strpos;
- /* XXXX This is a remnant of the old implementation. It
- looks wasteful, since now INTUIT can use many
- other heuristics. */
- prog->extflags &= ~RXf_USE_INTUIT;
- }
- else
- s = strpos;
- }
-
- /* Last resort... */
- /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */
- /* trie stclasses are too expensive to use here, we are better off to
- leave it to regmatch itself */
- if (progi->regstclass && PL_regkind[OP(progi->regstclass)]!=TRIE) {
- /* minlen == 0 is possible if regstclass is \b or \B,
- and the fixed substr is ''$.
- Since minlen is already taken into account, s+1 is before strend;
- accidentally, minlen >= 1 guaranties no false positives at s + 1
- even for \b or \B. But (minlen? 1 : 0) below assumes that
- regstclass does not come from lookahead... */
- /* If regstclass takes bytelength more than 1: If charlength==1, OK.
- This leaves EXACTF only, which is dealt with in find_byclass(). */
- const U8* const str = (U8*)STRING(progi->regstclass);
- const int cl_l = (PL_regkind[OP(progi->regstclass)] == EXACT
- ? CHR_DIST(str+STR_LEN(progi->regstclass), str)
- : 1);
- char * endpos;
- if (prog->anchored_substr || prog->anchored_utf8 || ml_anch)
- endpos= HOP3c(s, (prog->minlen ? cl_l : 0), strend);
- else if (prog->float_substr || prog->float_utf8)
- endpos= HOP3c(HOP3c(check_at, -start_shift, strbeg), cl_l, strend);
- else
- endpos= strend;
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %"IVdf" s: %"IVdf" endpos: %"IVdf"\n",
- (IV)start_shift, (IV)(check_at - strbeg), (IV)(s - strbeg), (IV)(endpos - strbeg)));
-
- t = s;
- s = find_byclass(prog, progi->regstclass, s, endpos, NULL);
- if (!s) {
-#ifdef DEBUGGING
- const char *what = NULL;
-#endif
- if (endpos == strend) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "This position contradicts STCLASS...\n") );
- if ((prog->extflags & RXf_ANCH) && !ml_anch)
- goto fail;
- /* Contradict one of substrings */
- if (prog->anchored_substr || prog->anchored_utf8) {
- if ((do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) == check) {
- DEBUG_EXECUTE_r( what = "anchored" );
- hop_and_restart:
- s = HOP3c(t, 1, strend);
- if (s + start_shift + end_shift > strend) {
- /* XXXX Should be taken into account earlier? */
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for %s substr starting at offset %ld...\n",
- what, (long)(s + start_shift - i_strpos)) );
- goto restart;
- }
- /* Have both, check_string is floating */
- if (t + start_shift >= check_at) /* Contradicts floating=check */
- goto retry_floating_check;
- /* Recheck anchored substring, but not floating... */
- s = check_at;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for anchored substr starting at offset %ld...\n",
- (long)(other_last - i_strpos)) );
- goto do_other_anchored;
- }
- /* Another way we could have checked stclass at the
- current position only: */
- if (ml_anch) {
- s = t = t + 1;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for /%s^%s/m starting at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t - i_strpos)) );
- goto try_at_offset;
- }
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) /* Could have been deleted */
- goto fail;
- /* Check is floating subtring. */
- retry_floating_check:
- t = check_at - start_shift;
- DEBUG_EXECUTE_r( what = "floating" );
- goto hop_and_restart;
- }
- if (t != s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "By STCLASS: moving %ld --> %ld\n",
- (long)(t - i_strpos), (long)(s - i_strpos))
- );
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Does not contradict STCLASS...\n");
- );
- }
- }
- giveup:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n",
- PL_colors[4], (check ? "Guessed" : "Giving up"),
- PL_colors[5], (long)(s - i_strpos)) );
- return s;
-
- fail_finish: /* Substring not found */
- if (prog->check_substr || prog->check_utf8) /* could be removed already */
- BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr) += 5; /* hooray */
- fail:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n",
- PL_colors[4], PL_colors[5]));
- return NULL;
-}
-
-#define DECL_TRIE_TYPE(scan) \
- const enum { trie_plain, trie_utf8, trie_utf8_fold, trie_latin_utf8_fold } \
- trie_type = (scan->flags != EXACT) \
- ? (do_utf8 ? trie_utf8_fold : (UTF ? trie_latin_utf8_fold : trie_plain)) \
- : (do_utf8 ? trie_utf8 : trie_plain)
-
-#define REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, uscan, len, \
-uvc, charid, foldlen, foldbuf, uniflags) STMT_START { \
- switch (trie_type) { \
- case trie_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_latin_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- len = 1; \
- uvc = to_uni_fold( *(U8*)uc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_utf8: \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- break; \
- case trie_plain: \
- uvc = (UV)*uc; \
- len = 1; \
- } \
- if (uvc < 256) { \
- charid = trie->charmap[ uvc ]; \
- } \
- else { \
- charid = 0; \
- if (widecharmap) { \
- SV** const svpp = hv_fetch(widecharmap, \
- (char*)&uvc, sizeof(UV), 0); \
- if (svpp) \
- charid = (U16)SvIV(*svpp); \
- } \
- } \
-} STMT_END
-
-#define REXEC_FBC_EXACTISH_CHECK(CoNd) \
-{ \
- char *my_strend= (char *)strend; \
- if ( (CoNd) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8, \
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- else { \
- U8 foldbuf[UTF8_MAXBYTES_CASE+1]; \
- uvchr_to_utf8(tmpbuf, c); \
- f = to_utf8_fold(tmpbuf, foldbuf, &foldlen); \
- if ( f != c \
- && (f == c1 || f == c2) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8,\
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- } \
-} \
-s += len
-
-#define REXEC_FBC_EXACTISH_SCAN(CoNd) \
-STMT_START { \
- while (s <= e) { \
- if ( (CoNd) \
- && (ln == 1 || !(OP(c) == EXACTF \
- ? ibcmp(s, m, ln) \
- : ibcmp_locale(s, m, ln))) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_SCAN(CoDe) \
-STMT_START { \
- while (s + (uskip = UTF8SKIP(s)) <= strend) { \
- CoDe \
- s += uskip; \
- } \
-} STMT_END
-
-#define REXEC_FBC_SCAN(CoDe) \
-STMT_START { \
- while (s < strend) { \
- CoDe \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_CLASS_SCAN(CoNd) \
-REXEC_FBC_UTF8_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_CLASS_SCAN(CoNd) \
-REXEC_FBC_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_TRYIT \
-if ((!reginfo || regtry(reginfo, &s))) \
- goto got_it
-
-#define REXEC_FBC_CSCAN(CoNdUtF8,CoNd) \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_PRELOAD(UtFpReLoAd,CoNdUtF8,CoNd) \
- if (do_utf8) { \
- UtFpReLoAd; \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_TAINT(CoNdUtF8,CoNd) \
- PL_reg_flags |= RF_tainted; \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define DUMP_EXEC_POS(li,s,doutf8) \
- dump_exec_pos(li,s,(PL_regeol),(PL_bostr),(PL_reg_starttry),doutf8)
-
-/* We know what class REx starts with. Try to find this position... */
-/* if reginfo is NULL, its a dryrun */
-/* annoyingly all the vars in this routine have different names from their counterparts
- in regmatch. /grrr */
-
-STATIC char *
-S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
- const char *strend, regmatch_info *reginfo)
-{
- dVAR;
- const I32 doevery = (prog->intflags & PREGf_SKIP) == 0;
- char *m;
- STRLEN ln;
- STRLEN lnc;
- register STRLEN uskip;
- unsigned int c1;
- unsigned int c2;
- char *e;
- register I32 tmp = 1; /* Scratch variable? */
- register const bool do_utf8 = PL_reg_match_utf8;
- RXi_GET_DECL(prog,progi);
-
- PERL_ARGS_ASSERT_FIND_BYCLASS;
-
- /* We know what class it must start with. */
- switch (OP(c)) {
- case ANYOF:
- if (do_utf8) {
- REXEC_FBC_UTF8_CLASS_SCAN((ANYOF_FLAGS(c) & ANYOF_UNICODE) ||
- !UTF8_IS_INVARIANT((U8)s[0]) ?
- reginclass(prog, c, (U8*)s, 0, do_utf8) :
- REGINCLASS(prog, c, (U8*)s));
- }
- else {
- while (s < strend) {
- STRLEN skip = 1;
-
- if (REGINCLASS(prog, c, (U8*)s) ||
- (ANYOF_FOLD_SHARP_S(c, s, strend) &&
- /* The assignment of 2 is intentional:
- * for the folded sharp s, the skip is 2. */
- (skip = SHARP_S_SKIP))) {
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += skip;
- }
- }
- break;
- case CANY:
- REXEC_FBC_SCAN(
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- );
- break;
- case EXACTF:
- m = STRING(c);
- ln = STR_LEN(c); /* length to match in octets/bytes */
- lnc = (I32) ln; /* length to match in characters */
- if (UTF) {
- STRLEN ulen1, ulen2;
- U8 *sm = (U8 *) m;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
- /* used by commented-out code below */
- /*const U32 uniflags = UTF8_ALLOW_DEFAULT;*/
-
- /* XXX: Since the node will be case folded at compile
- time this logic is a little odd, although im not
- sure that its actually wrong. --dmq */
-
- c1 = to_utf8_lower((U8*)m, tmpbuf1, &ulen1);
- c2 = to_utf8_upper((U8*)m, tmpbuf2, &ulen2);
-
- /* XXX: This is kinda strange. to_utf8_XYZ returns the
- codepoint of the first character in the converted
- form, yet originally we did the extra step.
- No tests fail by commenting this code out however
- so Ive left it out. -- dmq.
-
- c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- */
-
- lnc = 0;
- while (sm < ((U8 *) m + ln)) {
- lnc++;
- sm += UTF8SKIP(sm);
- }
- }
- else {
- c1 = *(U8*)m;
- c2 = PL_fold[c1];
- }
- goto do_exactf;
- case EXACTFL:
- m = STRING(c);
- ln = STR_LEN(c);
- lnc = (I32) ln;
- c1 = *(U8*)m;
- c2 = PL_fold_locale[c1];
- do_exactf:
- e = HOP3c(strend, -((I32)lnc), s);
-
- if (!reginfo && e < s)
- e = s; /* Due to minlen logic of intuit() */
-
- /* The idea in the EXACTF* cases is to first find the
- * first character of the EXACTF* node and then, if
- * necessary, case-insensitively compare the full
- * text of the node. The c1 and c2 are the first
- * characters (though in Unicode it gets a bit
- * more complicated because there are more cases
- * than just upper and lower: one needs to use
- * the so-called folding case for case-insensitive
- * matching (called "loose matching" in Unicode).
- * ibcmp_utf8() will do just that. */
-
- if (do_utf8 || UTF) {
- UV c, f;
- U8 tmpbuf [UTF8_MAXBYTES+1];
- STRLEN len = 1;
- STRLEN foldlen;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- if (c1 == c2) {
- /* Upper and lower of 1st char are equal -
- * probably not a "letter". */
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
- REXEC_FBC_EXACTISH_CHECK(c == c1);
- }
- }
- else {
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
-
- /* Handle some of the three Greek sigmas cases.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (the character class or ANYOF cases)
- * are handled during compiletime in
- * regexec.c:S_regclass(). */
- if (c == (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA ||
- c == (UV)UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA)
- c = (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA;
-
- REXEC_FBC_EXACTISH_CHECK(c == c1 || c == c2);
- }
- }
- }
- else {
- /* Neither pattern nor string are UTF8 */
- if (c1 == c2)
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1);
- else
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1 || *(U8*)s == c2);
- }
- break;
- case BOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == BOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == BOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- if ((!prog->minlen && tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NBOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == NBOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == NBOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == NBOUND ?
- isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- if ((!prog->minlen && !tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case ALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- isALNUM(*s)
- );
- case ALNUML:
- REXEC_FBC_CSCAN_TAINT(
- isALNUM_LC_utf8((U8*)s),
- isALNUM_LC(*s)
- );
- case NALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- !swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- !isALNUM(*s)
- );
- case NALNUML:
- REXEC_FBC_CSCAN_TAINT(
- !isALNUM_LC_utf8((U8*)s),
- !isALNUM_LC(*s)
- );
- case SPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- *s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8),
- isSPACE(*s)
- );
- case SPACEL:
- REXEC_FBC_CSCAN_TAINT(
- *s == ' ' || isSPACE_LC_utf8((U8*)s),
- isSPACE_LC(*s)
- );
- case NSPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- !(*s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8)),
- !isSPACE(*s)
- );
- case NSPACEL:
- REXEC_FBC_CSCAN_TAINT(
- !(*s == ' ' || isSPACE_LC_utf8((U8*)s)),
- !isSPACE_LC(*s)
- );
- case DIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- isDIGIT(*s)
- );
- case DIGITL:
- REXEC_FBC_CSCAN_TAINT(
- isDIGIT_LC_utf8((U8*)s),
- isDIGIT_LC(*s)
- );
- case NDIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- !swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- !isDIGIT(*s)
- );
- case NDIGITL:
- REXEC_FBC_CSCAN_TAINT(
- !isDIGIT_LC_utf8((U8*)s),
- !isDIGIT_LC(*s)
- );
- case LNBREAK:
- REXEC_FBC_CSCAN(
- is_LNBREAK_utf8(s),
- is_LNBREAK_latin1(s)
- );
- case VERTWS:
- REXEC_FBC_CSCAN(
- is_VERTWS_utf8(s),
- is_VERTWS_latin1(s)
- );
- case NVERTWS:
- REXEC_FBC_CSCAN(
- !is_VERTWS_utf8(s),
- !is_VERTWS_latin1(s)
- );
- case HORIZWS:
- REXEC_FBC_CSCAN(
- is_HORIZWS_utf8(s),
- is_HORIZWS_latin1(s)
- );
- case NHORIZWS:
- REXEC_FBC_CSCAN(
- !is_HORIZWS_utf8(s),
- !is_HORIZWS_latin1(s)
- );
- case AHOCORASICKC:
- case AHOCORASICK:
- {
- DECL_TRIE_TYPE(c);
- /* what trie are we using right now */
- reg_ac_data *aho
- = (reg_ac_data*)progi->data->data[ ARG( c ) ];
- reg_trie_data *trie
- = (reg_trie_data*)progi->data->data[ aho->trie ];
- HV *widecharmap = MUTABLE_HV(progi->data->data[ aho->trie + 1 ]);
-
- const char *last_start = strend - trie->minlen;
-#ifdef DEBUGGING
- const char *real_start = s;
-#endif
- STRLEN maxlen = trie->maxlen;
- SV *sv_points;
- U8 **points; /* map of where we were in the input string
- when reading a given char. For ASCII this
- is unnecessary overhead as the relationship
- is always 1:1, but for Unicode, especially
- case folded Unicode this is not true. */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- U8 *bitmap=NULL;
-
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- /* We can't just allocate points here. We need to wrap it in
- * an SV so it gets freed properly if there is a croak while
- * running the match */
- ENTER;
- SAVETMPS;
- sv_points=newSV(maxlen * sizeof(U8 *));
- SvCUR_set(sv_points,
- maxlen * sizeof(U8 *));
- SvPOK_on(sv_points);
- sv_2mortal(sv_points);
- points=(U8**)SvPV_nolen(sv_points );
- if ( trie_type != trie_utf8_fold
- && (trie->bitmap || OP(c)==AHOCORASICKC) )
- {
- if (trie->bitmap)
- bitmap=(U8*)trie->bitmap;
- else
- bitmap=(U8*)ANYOF_BITMAP(c);
- }
- /* this is the Aho-Corasick algorithm modified a touch
- to include special handling for long "unknown char"
- sequences. The basic idea being that we use AC as long
- as we are dealing with a possible matching char, when
- we encounter an unknown char (and we have not encountered
- an accepting state) we scan forward until we find a legal
- starting char.
- AC matching is basically that of trie matching, except
- that when we encounter a failing transition, we fall back
- to the current states "fail state", and try the current char
- again, a process we repeat until we reach the root state,
- state 1, or a legal transition. If we fail on the root state
- then we can either terminate if we have reached an accepting
- state previously, or restart the entire process from the beginning
- if we have not.
-
- */
- while (s <= last_start) {
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- U8 *uc = (U8*)s;
- U16 charid = 0;
- U32 base = 1;
- U32 state = 1;
- UV uvc = 0;
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- U8 *leftmost = NULL;
-#ifdef DEBUGGING
- U32 accepted_word= 0;
-#endif
- U32 pointpos = 0;
-
- while ( state && uc <= (U8*)strend ) {
- int failed=0;
- U32 word = aho->states[ state ].wordnum;
-
- if( state==1 ) {
- if ( bitmap ) {
- DEBUG_TRIE_EXECUTE_r(
- if ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- dump_exec_pos( (char *)uc, c, strend, real_start,
- (char *)uc, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- " Scanning for legal start char...\n");
- }
- );
- while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- uc++;
- }
- s= (char *)uc;
- }
- if (uc >(U8*)last_start) break;
- }
-
- if ( word ) {
- U8 *lpos= points[ (pointpos - trie->wordlen[word-1] ) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=word);
- leftmost= lpos;
- }
- if (base==0) break;
-
- }
- points[pointpos++ % maxlen]= uc;
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
- DEBUG_TRIE_EXECUTE_r({
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf(Perl_debug_log,
- " Charid:%3u CP:%4"UVxf" ",
- charid, uvc);
- });
-
- do {
-#ifdef DEBUGGING
- word = aho->states[ state ].wordnum;
-#endif
- base = aho->states[ state ].trans.base;
-
- DEBUG_TRIE_EXECUTE_r({
- if (failed)
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%sState: %4"UVxf", word=%"UVxf,
- failed ? " Fail transition to " : "",
- (UV)state, (UV)word);
- });
- if ( base ) {
- U32 tmp;
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state
- && (tmp=trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next))
- {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - legal\n"));
- state = tmp;
- break;
- }
- else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - fail\n"));
- failed = 1;
- state = aho->fail[state];
- }
- }
- else {
- /* we must be accepting here */
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - accepting\n"));
- failed = 1;
- break;
- }
- } while(state);
- uc += len;
- if (failed) {
- if (leftmost)
- break;
- if (!state) state = 1;
- }
- }
- if ( aho->states[ state ].wordnum ) {
- U8 *lpos = points[ (pointpos - trie->wordlen[aho->states[ state ].wordnum-1]) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=aho->states[ state ].wordnum);
- leftmost = lpos;
- }
- }
- if (leftmost) {
- s = (char*)leftmost;
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf(
- Perl_debug_log,"Matches word #%"UVxf" at position %"IVdf". Trying full pattern...\n",
- (UV)accepted_word, (IV)(s - real_start)
- );
- });
- if (!reginfo || regtry(reginfo, &s)) {
- FREETMPS;
- LEAVE;
- goto got_it;
- }
- s = HOPc(s,1);
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,"Pattern failed. Looking for new start point...\n");
- });
- } else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,"No match.\n"));
- break;
- }
- }
- FREETMPS;
- LEAVE;
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c));
- break;
- }
- return 0;
- got_it:
- return s;
-}
-
-
-/*
- - regexec_flags - match a regexp against a string
- */
-I32
-Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, register char *strend,
- char *strbeg, I32 minend, SV *sv, void *data, U32 flags)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* data: May be used for some additional optimizations.
- Currently its only used, with a U32 cast, for transmitting
- the ganch offset when doing a /g match. This will change */
-/* nosave: For optimizations. */
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- /*register*/ char *s;
- register regnode *c;
- /*register*/ char *startpos = stringarg;
- I32 minlen; /* must match at least this many chars */
- I32 dontbother = 0; /* how many characters not to try at end */
- I32 end_shift = 0; /* Same for the end. */ /* CC */
- I32 scream_pos = -1; /* Internal iterator of scream. */
- char *scream_olds = NULL;
- const bool do_utf8 = (bool)DO_UTF8(sv);
- I32 multiline;
- RXi_GET_DECL(prog,progi);
- regmatch_info reginfo; /* create some info to pass to regtry etc */
- regexp_paren_pair *swap = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGEXEC_FLAGS;
- PERL_UNUSED_ARG(data);
-
- /* Be paranoid... */
- if (prog == NULL || startpos == NULL) {
- Perl_croak(aTHX_ "NULL regexp parameter");
- return 0;
- }
-
- multiline = prog->extflags & RXf_PMf_MULTILINE;
- reginfo.prog = rx; /* Yes, sorry that this is confusing. */
-
- RX_MATCH_UTF8_set(rx, do_utf8);
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, startpos, strend,
- "Matching");
- );
-
- minlen = prog->minlen;
-
- if (strend - startpos < (minlen+(prog->check_offset_min<0?prog->check_offset_min:0))) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short [regexec_flags]...\n"));
- goto phooey;
- }
-
-
- /* Check validity of program. */
- if (UCHARAT(progi->program) != REG_MAGIC) {
- Perl_croak(aTHX_ "corrupted regexp program");
- }
-
- PL_reg_flags = 0;
- PL_reg_eval_set = 0;
- PL_reg_maxiter = 0;
-
- if (RX_UTF8(rx))
- PL_reg_flags |= RF_utf8;
-
- /* Mark beginning of line for ^ and lookbehind. */
- reginfo.bol = startpos; /* XXX not used ??? */
- PL_bostr = strbeg;
- reginfo.sv = sv;
-
- /* Mark end of line for $ (and such) */
- PL_regeol = strend;
-
- /* see how far we have to get to not match where we matched before */
- reginfo.till = startpos+minend;
-
- /* If there is a "must appear" string, look for it. */
- s = startpos;
-
- if (prog->extflags & RXf_GPOS_SEEN) { /* Need to set reginfo->ganch */
- MAGIC *mg;
- if (flags & REXEC_IGNOREPOS){ /* Means: check only at start */
- reginfo.ganch = startpos + prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS IGNOREPOS: reginfo.ganch = startpos + %"UVxf"\n",(UV)prog->gofs));
- } else if (sv && SvTYPE(sv) >= SVt_PVMG
- && SvMAGIC(sv)
- && (mg = mg_find(sv, PERL_MAGIC_regex_global))
- && mg->mg_len >= 0) {
- reginfo.ganch = strbeg + mg->mg_len; /* Defined pos() */
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS MAGIC: reginfo.ganch = strbeg + %"IVdf"\n",(IV)mg->mg_len));
-
- if (prog->extflags & RXf_ANCH_GPOS) {
- if (s > reginfo.ganch)
- goto phooey;
- s = reginfo.ganch - prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS ANCH_GPOS: s = ganch - %"UVxf"\n",(UV)prog->gofs));
- if (s < strbeg)
- goto phooey;
- }
- }
- else if (data) {
- reginfo.ganch = strbeg + PTR2UV(data);
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS DATA: reginfo.ganch= strbeg + %"UVxf"\n",PTR2UV(data)));
-
- } else { /* pos() not defined */
- reginfo.ganch = strbeg;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS: reginfo.ganch = strbeg\n"));
- }
- }
- if (PL_curpm && (PM_GETRE(PL_curpm) == rx)) {
- /* We have to be careful. If the previous successful match
- was from this regex we don't want a subsequent partially
- successful match to clobber the old results.
- So when we detect this possibility we add a swap buffer
- to the re, and switch the buffer each match. If we fail
- we switch it back, otherwise we leave it swapped.
- */
- swap = prog->offs;
- /* do we need a save destructor here for eval dies? */
- Newxz(prog->offs, (prog->nparens + 1), regexp_paren_pair);
- }
- if (!(flags & REXEC_CHECKED) && (prog->check_substr != NULL || prog->check_utf8 != NULL)) {
- re_scream_pos_data d;
-
- d.scream_olds = &scream_olds;
- d.scream_pos = &scream_pos;
- s = re_intuit_start(rx, sv, s, strend, flags, &d);
- if (!s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not present...\n"));
- goto phooey; /* not present */
- }
- }
-
-
-
- /* Simplest case: anchored match need be tried only once. */
- /* [unless only anchor is BOL and multiline is set] */
- if (prog->extflags & (RXf_ANCH & ~RXf_ANCH_GPOS)) {
- if (s == startpos && regtry(®info, &startpos))
- goto got_it;
- else if (multiline || (prog->intflags & PREGf_IMPLICIT)
- || (prog->extflags & RXf_ANCH_MBOL)) /* XXXX SBOL? */
- {
- char *end;
-
- if (minlen)
- dontbother = minlen - 1;
- end = HOP3c(strend, -dontbother, strbeg) - 1;
- /* for multiline we only have to try after newlines */
- if (prog->check_substr || prog->check_utf8) {
- if (s == startpos)
- goto after_try;
- while (1) {
- if (regtry(®info, &s))
- goto got_it;
- after_try:
- if (s > end)
- goto phooey;
- if (prog->extflags & RXf_USE_INTUIT) {
- s = re_intuit_start(rx, sv, s + 1, strend, flags, NULL);
- if (!s)
- goto phooey;
- }
- else
- s++;
- }
- } else {
- if (s > startpos)
- s--;
- while (s < end) {
- if (*s++ == '\n') { /* don't need PL_utf8skip here */
- if (regtry(®info, &s))
- goto got_it;
- }
- }
- }
- }
- goto phooey;
- } else if (RXf_GPOS_CHECK == (prog->extflags & RXf_GPOS_CHECK))
- {
- /* the warning about reginfo.ganch being used without intialization
- is bogus -- we set it above, when prog->extflags & RXf_GPOS_SEEN
- and we only enter this block when the same bit is set. */
- char *tmp_s = reginfo.ganch - prog->gofs;
-
- if (tmp_s >= strbeg && regtry(®info, &tmp_s))
- goto got_it;
- goto phooey;
- }
-
- /* Messy cases: unanchored match. */
- if ((prog->anchored_substr || prog->anchored_utf8) && prog->intflags & PREGf_SKIP) {
- /* we have /x+whatever/ */
- /* it must be a one character string (XXXX Except UTF?) */
- char ch;
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- ch = SvPVX_const(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)[0];
-
- if (do_utf8) {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s += UTF8SKIP(s);
- while (s < strend && *s == ch)
- s += UTF8SKIP(s);
- }
- );
- }
- else {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s++;
- while (s < strend && *s == ch)
- s++;
- }
- );
- }
- DEBUG_EXECUTE_r(if (!did_match)
- PerlIO_printf(Perl_debug_log,
- "Did not find anchored character...\n")
- );
- }
- else if (prog->anchored_substr != NULL
- || prog->anchored_utf8 != NULL
- || ((prog->float_substr != NULL || prog->float_utf8 != NULL)
- && prog->float_max_offset < strend - s)) {
- SV *must;
- I32 back_max;
- I32 back_min;
- char *last;
- char *last1; /* Last position checked before */
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (prog->anchored_substr || prog->anchored_utf8) {
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- back_max = back_min = prog->anchored_offset;
- } else {
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- back_max = prog->float_max_offset;
- back_min = prog->float_min_offset;
- }
-
-
- if (must == &PL_sv_undef)
- /* could not downgrade utf8 check substring, so must fail */
- goto phooey;
-
- if (back_min<0) {
- last = strend;
- } else {
- last = HOP3c(strend, /* Cannot start after this */
- -(I32)(CHR_SVLEN(must)
- - (SvTAIL(must) != 0) + back_min), strbeg);
- }
- if (s > PL_bostr)
- last1 = HOPc(s, -1);
- else
- last1 = s - 1; /* bogus */
-
- /* XXXX check_substr already used to find "s", can optimize if
- check_substr==must. */
- scream_pos = -1;
- dontbother = end_shift;
- strend = HOPc(strend, -dontbother);
- while ( (s <= last) &&
- ((flags & REXEC_SCREAM)
- ? (s = screaminstr(sv, must, HOP3c(s, back_min, (back_min<0 ? strbeg : strend)) - strbeg,
- end_shift, &scream_pos, 0))
- : (s = fbm_instr((unsigned char*)HOP3(s, back_min, (back_min<0 ? strbeg : strend)),
- (unsigned char*)strend, must,
- multiline ? FBMrf_MULTILINE : 0))) ) {
- /* we may be pointing at the wrong string */
- if ((flags & REXEC_SCREAM) && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- DEBUG_EXECUTE_r( did_match = 1 );
- if (HOPc(s, -back_max) > last1) {
- last1 = HOPc(s, -back_min);
- s = HOPc(s, -back_max);
- }
- else {
- char * const t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1;
-
- last1 = HOPc(s, -back_min);
- s = t;
- }
- if (do_utf8) {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s += UTF8SKIP(s);
- }
- }
- else {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s++;
- }
- }
- }
- DEBUG_EXECUTE_r(if (!did_match) {
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "Did not find %s substr %s%s...\n",
- ((must == prog->anchored_substr || must == prog->anchored_utf8)
- ? "anchored" : "floating"),
- quoted, RE_SV_TAIL(must));
- });
- goto phooey;
- }
- else if ( (c = progi->regstclass) ) {
- if (minlen) {
- const OPCODE op = OP(progi->regstclass);
- /* don't bother with what can't match */
- if (PL_regkind[op] != EXACT && op != CANY && PL_regkind[op] != TRIE)
- strend = HOPc(strend, -(minlen - 1));
- }
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, c);
- {
- RE_PV_QUOTED_DECL(quoted,do_utf8,PERL_DEBUG_PAD_ZERO(1),
- s,strend-s,60);
- PerlIO_printf(Perl_debug_log,
- "Matching stclass %.*s against %s (%d chars)\n",
- (int)SvCUR(prop), SvPVX_const(prop),
- quoted, (int)(strend - s));
- }
- });
- if (find_byclass(prog, c, s, strend, ®info))
- goto got_it;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass... [regexec_flags]\n"));
- }
- else {
- dontbother = 0;
- if (prog->float_substr != NULL || prog->float_utf8 != NULL) {
- /* Trim the end. */
- char *last;
- SV* float_real;
-
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- float_real = do_utf8 ? prog->float_utf8 : prog->float_substr;
-
- if (flags & REXEC_SCREAM) {
- last = screaminstr(sv, float_real, s - strbeg,
- end_shift, &scream_pos, 1); /* last one */
- if (!last)
- last = scream_olds; /* Only one occurrence. */
- /* we may be pointing at the wrong string */
- else if (RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- }
- else {
- STRLEN len;
- const char * const little = SvPV_const(float_real, len);
-
- if (SvTAIL(float_real)) {
- if (memEQ(strend - len + 1, little, len - 1))
- last = strend - len + 1;
- else if (!multiline)
- last = memEQ(strend - len, little, len)
- ? strend - len : NULL;
- else
- goto find_last;
- } else {
- find_last:
- if (len)
- last = rninstr(s, strend, little, little + len);
- else
- last = strend; /* matching "$" */
- }
- }
- if (last == NULL) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%sCan't trim the tail, match fails (should not happen)%s\n",
- PL_colors[4], PL_colors[5]));
- goto phooey; /* Should not happen! */
- }
- dontbother = strend - last + prog->float_min_offset;
- }
- if (minlen && (dontbother < minlen))
- dontbother = minlen - 1;
- strend -= dontbother; /* this one's always in bytes! */
- /* We don't know much -- general case. */
- if (do_utf8) {
- for (;;) {
- if (regtry(®info, &s))
- goto got_it;
- if (s >= strend)
- break;
- s += UTF8SKIP(s);
- };
- }
- else {
- do {
- if (regtry(®info, &s))
- goto got_it;
- } while (s++ < strend);
- }
- }
-
- /* Failure. */
- goto phooey;
-
-got_it:
- Safefree(swap);
- RX_MATCH_TAINTED_set(rx, PL_reg_flags & RF_tainted);
-
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (RXp_PAREN_NAMES(prog))
- (void)hv_iterinit(RXp_PAREN_NAMES(prog));
-
- /* make sure $`, $&, $', and $digit will work later */
- if ( !(flags & REXEC_NOT_FIRST) ) {
- RX_MATCH_COPY_FREE(rx);
- if (flags & REXEC_COPY_STR) {
- const I32 i = PL_regeol - startpos + (stringarg - strbeg);
-#ifdef PERL_OLD_COPY_ON_WRITE
- if ((SvIsCOW(sv)
- || (SvFLAGS(sv) & CAN_COW_MASK) == CAN_COW_FLAGS)) {
- if (DEBUG_C_TEST) {
- PerlIO_printf(Perl_debug_log,
- "Copy on write: regexp capture, type %d\n",
- (int) SvTYPE(sv));
- }
- prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv);
- prog->subbeg = (char *)SvPVX_const(prog->saved_copy);
- assert (SvPOKp(prog->saved_copy));
- } else
-#endif
- {
- RX_MATCH_COPIED_on(rx);
- s = savepvn(strbeg, i);
- prog->subbeg = s;
- }
- prog->sublen = i;
- }
- else {
- prog->subbeg = strbeg;
- prog->sublen = PL_regeol - strbeg; /* strend may have been modified */
- }
- }
-
- return 1;
-
-phooey:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n",
- PL_colors[4], PL_colors[5]));
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (swap) {
- /* we failed :-( roll it back */
- Safefree(prog->offs);
- prog->offs = swap;
- }
-
- return 0;
-}
-
-
-/*
- - regtry - try match at specific point
- */
-STATIC I32 /* 0 failure, 1 success */
-S_regtry(pTHX_ regmatch_info *reginfo, char **startpos)
-{
- dVAR;
- CHECKPOINT lastcp;
- REGEXP *const rx = reginfo->prog;
- regexp *const prog = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTRY;
-
- reginfo->cutpoint=NULL;
-
- if ((prog->extflags & RXf_EVAL_SEEN) && !PL_reg_eval_set) {
- MAGIC *mg;
-
- PL_reg_eval_set = RS_init;
- DEBUG_EXECUTE_r(DEBUG_s(
- PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n",
- (IV)(PL_stack_sp - PL_stack_base));
- ));
- SAVESTACK_CXPOS();
- cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base;
- /* Otherwise OP_NEXTSTATE will free whatever on stack now. */
- SAVETMPS;
- /* Apparently this is not needed, judging by wantarray. */
- /* SAVEI8(cxstack[cxstack_ix].blk_gimme);
- cxstack[cxstack_ix].blk_gimme = G_SCALAR; */
-
- if (reginfo->sv) {
- /* Make $_ available to executed code. */
- if (reginfo->sv != DEFSV) {
- SAVE_DEFSV;
- DEFSV_set(reginfo->sv);
- }
-
- if (!(SvTYPE(reginfo->sv) >= SVt_PVMG && SvMAGIC(reginfo->sv)
- && (mg = mg_find(reginfo->sv, PERL_MAGIC_regex_global)))) {
- /* prepare for quick setting of pos */
-#ifdef PERL_OLD_COPY_ON_WRITE
- if (SvIsCOW(reginfo->sv))
- sv_force_normal_flags(reginfo->sv, 0);
-#endif
- mg = sv_magicext(reginfo->sv, NULL, PERL_MAGIC_regex_global,
- &PL_vtbl_mglob, NULL, 0);
- mg->mg_len = -1;
- }
- PL_reg_magic = mg;
- PL_reg_oldpos = mg->mg_len;
- SAVEDESTRUCTOR_X(restore_pos, prog);
- }
- if (!PL_reg_curpm) {
- Newxz(PL_reg_curpm, 1, PMOP);
-#ifdef USE_ITHREADS
- {
- SV* const repointer = &PL_sv_undef;
- /* this regexp is also owned by the new PL_reg_curpm, which
- will try to free it. */
- av_push(PL_regex_padav, repointer);
- PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav);
- PL_regex_pad = AvARRAY(PL_regex_padav);
- }
-#endif
- }
-#ifdef USE_ITHREADS
- /* It seems that non-ithreads works both with and without this code.
- So for efficiency reasons it seems best not to have the code
- compiled when it is not needed. */
- /* This is safe against NULLs: */
- ReREFCNT_dec(PM_GETRE(PL_reg_curpm));
- /* PM_reg_curpm owns a reference to this regexp. */
- ReREFCNT_inc(rx);
-#endif
- PM_SETRE(PL_reg_curpm, rx);
- PL_reg_oldcurpm = PL_curpm;
- PL_curpm = PL_reg_curpm;
- if (RXp_MATCH_COPIED(prog)) {
- /* Here is a serious problem: we cannot rewrite subbeg,
- since it may be needed if this match fails. Thus
- $` inside (?{}) could fail... */
- PL_reg_oldsaved = prog->subbeg;
- PL_reg_oldsavedlen = prog->sublen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = prog->saved_copy;
-#endif
- RXp_MATCH_COPIED_off(prog);
- }
- else
- PL_reg_oldsaved = NULL;
- prog->subbeg = PL_bostr;
- prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */
- }
- DEBUG_EXECUTE_r(PL_reg_starttry = *startpos);
- prog->offs[0].start = *startpos - PL_bostr;
- PL_reginput = *startpos;
- PL_reglastparen = &prog->lastparen;
- PL_reglastcloseparen = &prog->lastcloseparen;
- prog->lastparen = 0;
- prog->lastcloseparen = 0;
- PL_regsize = 0;
- PL_regoffs = prog->offs;
- if (PL_reg_start_tmpl <= prog->nparens) {
- PL_reg_start_tmpl = prog->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- /* XXXX What this code is doing here?!!! There should be no need
- to do this again and again, PL_reglastparen should take care of
- this! --ilya*/
-
- /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code.
- * Actually, the code in regcppop() (which Ilya may be meaning by
- * PL_reglastparen), is not needed at all by the test suite
- * (op/regexp, op/pat, op/split), but that code is needed otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * Meanwhile, this code *is* needed for the
- * above-mentioned test suite tests to succeed. The common theme
- * on those tests seems to be returning null fields from matches.
- * --jhi updated by dapm */
-#if 1
- if (prog->nparens) {
- regexp_paren_pair *pp = PL_regoffs;
- register I32 i;
- for (i = prog->nparens; i > (I32)*PL_reglastparen; i--) {
- ++pp;
- pp->start = -1;
- pp->end = -1;
- }
- }
-#endif
- REGCP_SET(lastcp);
- if (regmatch(reginfo, progi->program + 1)) {
- PL_regoffs[0].end = PL_reginput - PL_bostr;
- return 1;
- }
- if (reginfo->cutpoint)
- *startpos= reginfo->cutpoint;
- REGCP_UNWIND(lastcp);
- return 0;
-}
-
-
-#define sayYES goto yes
-#define sayNO goto no
-#define sayNO_SILENT goto no_silent
-
-/* we dont use STMT_START/END here because it leads to
- "unreachable code" warnings, which are bogus, but distracting. */
-#define CACHEsayNO \
- if (ST.cache_mask) \
- PL_reg_poscache[ST.cache_offset] |= ST.cache_mask; \
- sayNO
-
-/* this is used to determine how far from the left messages like
- 'failed...' are printed. It should be set such that messages
- are inline with the regop output that created them.
-*/
-#define REPORT_CODE_OFF 32
-
-
-/* Make sure there is a test for this +1 options in re_tests */
-#define TRIE_INITAL_ACCEPT_BUFFLEN 4;
-
-#define CHRTEST_UNINIT -1001 /* c1/c2 haven't been calculated yet */
-#define CHRTEST_VOID -1000 /* the c1/c2 "next char" test should be skipped */
-
-#define SLAB_FIRST(s) (&(s)->states[0])
-#define SLAB_LAST(s) (&(s)->states[PERL_REGMATCH_SLAB_SLOTS-1])
-
-/* grab a new slab and return the first slot in it */
-
-STATIC regmatch_state *
-S_push_slab(pTHX)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- regmatch_slab *s = PL_regmatch_slab->next;
- if (!s) {
- Newx(s, 1, regmatch_slab);
- s->prev = PL_regmatch_slab;
- s->next = NULL;
- PL_regmatch_slab->next = s;
- }
- PL_regmatch_slab = s;
- return SLAB_FIRST(s);
-}
-
-
-/* push a new state then goto it */
-
-#define PUSH_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_state;
-
-/* push a new state with success backtracking, then goto it */
-
-#define PUSH_YES_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_yes_state;
-
-
-
-/*
-
-regmatch() - main matching routine
-
-This is basically one big switch statement in a loop. We execute an op,
-set 'next' to point the next op, and continue. If we come to a point which
-we may need to backtrack to on failure such as (A|B|C), we push a
-backtrack state onto the backtrack stack. On failure, we pop the top
-state, and re-enter the loop at the state indicated. If there are no more
-states to pop, we return failure.
-
-Sometimes we also need to backtrack on success; for example /A+/, where
-after successfully matching one A, we need to go back and try to
-match another one; similarly for lookahead assertions: if the assertion
-completes successfully, we backtrack to the state just before the assertion
-and then carry on. In these cases, the pushed state is marked as
-'backtrack on success too'. This marking is in fact done by a chain of
-pointers, each pointing to the previous 'yes' state. On success, we pop to
-the nearest yes state, discarding any intermediate failure-only states.
-Sometimes a yes state is pushed just to force some cleanup code to be
-called at the end of a successful match or submatch; e.g. (??{$re}) uses
-it to free the inner regex.
-
-Note that failure backtracking rewinds the cursor position, while
-success backtracking leaves it alone.
-
-A pattern is complete when the END op is executed, while a subpattern
-such as (?=foo) is complete when the SUCCESS op is executed. Both of these
-ops trigger the "pop to last yes state if any, otherwise return true"
-behaviour.
-
-A common convention in this function is to use A and B to refer to the two
-subpatterns (or to the first nodes thereof) in patterns like /A*B/: so A is
-the subpattern to be matched possibly multiple times, while B is the entire
-rest of the pattern. Variable and state names reflect this convention.
-
-The states in the main switch are the union of ops and failure/success of
-substates associated with with that op. For example, IFMATCH is the op
-that does lookahead assertions /(?=A)B/ and so the IFMATCH state means
-'execute IFMATCH'; while IFMATCH_A is a state saying that we have just
-successfully matched A and IFMATCH_A_fail is a state saying that we have
-just failed to match A. Resume states always come in pairs. The backtrack
-state we push is marked as 'IFMATCH_A', but when that is popped, we resume
-at IFMATCH_A or IFMATCH_A_fail, depending on whether we are backtracking
-on success or failure.
-
-The struct that holds a backtracking state is actually a big union, with
-one variant for each major type of op. The variable st points to the
-top-most backtrack struct. To make the code clearer, within each
-block of code we #define ST to alias the relevant union.
-
-Here's a concrete example of a (vastly oversimplified) IFMATCH
-implementation:
-
- switch (state) {
- ....
-
-#define ST st->u.ifmatch
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- ST.foo = ...; // some state we wish to save
- ...
- // push a yes backtrack state with a resume value of
- // IFMATCH_A/IFMATCH_A_fail, then continue execution at the
- // first node of A:
- PUSH_YES_STATE_GOTO(IFMATCH_A, A);
- // NOTREACHED
-
- case IFMATCH_A: // we have successfully executed A; now continue with B
- next = B;
- bar = ST.foo; // do something with the preserved value
- break;
-
- case IFMATCH_A_fail: // A failed, so the assertion failed
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
-
-#undef ST
-
- ...
- }
-
-For any old-timers reading this who are familiar with the old recursive
-approach, the code above is equivalent to:
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- {
- int foo = ...
- ...
- if (regmatch(A)) {
- next = B;
- bar = foo;
- break;
- }
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
- }
-
-The topmost backtrack state, pointed to by st, is usually free. If you
-want to claim it, populate any ST.foo fields in it with values you wish to
-save, then do one of
-
- PUSH_STATE_GOTO(resume_state, node);
- PUSH_YES_STATE_GOTO(resume_state, node);
-
-which sets that backtrack state's resume value to 'resume_state', pushes a
-new free entry to the top of the backtrack stack, then goes to 'node'.
-On backtracking, the free slot is popped, and the saved state becomes the
-new free state. An ST.foo field in this new top state can be temporarily
-accessed to retrieve values, but once the main loop is re-entered, it
-becomes available for reuse.
-
-Note that the depth of the backtrack stack constantly increases during the
-left-to-right execution of the pattern, rather than going up and down with
-the pattern nesting. For example the stack is at its maximum at Z at the
-end of the pattern, rather than at X in the following:
-
- /(((X)+)+)+....(Y)+....Z/
-
-The only exceptions to this are lookahead/behind assertions and the cut,
-(?>A), which pop all the backtrack states associated with A before
-continuing.
-
-Bascktrack state structs are allocated in slabs of about 4K in size.
-PL_regmatch_state and st always point to the currently active state,
-and PL_regmatch_slab points to the slab currently containing
-PL_regmatch_state. The first time regmatch() is called, the first slab is
-allocated, and is never freed until interpreter destruction. When the slab
-is full, a new one is allocated and chained to the end. At exit from
-regmatch(), slabs allocated since entry are freed.
-
-*/
-
-
-#define DEBUG_STATE_pp(pp) \
- DEBUG_STATE_r({ \
- DUMP_EXEC_POS(locinput, scan, do_utf8); \
- PerlIO_printf(Perl_debug_log, \
- " %*s"pp" %s%s%s%s%s\n", \
- depth*2, "", \
- PL_reg_name[st->resume_state], \
- ((st==yes_state||st==mark_state) ? "[" : ""), \
- ((st==yes_state) ? "Y" : ""), \
- ((st==mark_state) ? "M" : ""), \
- ((st==yes_state||st==mark_state) ? "]" : "") \
- ); \
- });
-
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-prog) : -1)
-
-#ifdef DEBUGGING
-
-STATIC void
-S_debug_start_match(pTHX_ const REGEXP *prog, const bool do_utf8,
- const char *start, const char *end, const char *blurb)
-{
- const bool utf8_pat = RX_UTF8(prog) ? 1 : 0;
-
- PERL_ARGS_ASSERT_DEBUG_START_MATCH;
-
- if (!PL_colorset)
- reginitcolors();
- {
- RE_PV_QUOTED_DECL(s0, utf8_pat, PERL_DEBUG_PAD_ZERO(0),
- RX_PRECOMP_const(prog), RX_PRELEN(prog), 60);
-
- RE_PV_QUOTED_DECL(s1, do_utf8, PERL_DEBUG_PAD_ZERO(1),
- start, end - start, 60);
-
- PerlIO_printf(Perl_debug_log,
- "%s%s REx%s %s against %s\n",
- PL_colors[4], blurb, PL_colors[5], s0, s1);
-
- if (do_utf8||utf8_pat)
- PerlIO_printf(Perl_debug_log, "UTF-8 %s%s%s...\n",
- utf8_pat ? "pattern" : "",
- utf8_pat && do_utf8 ? " and " : "",
- do_utf8 ? "string" : ""
- );
- }
-}
-
-STATIC void
-S_dump_exec_pos(pTHX_ const char *locinput,
- const regnode *scan,
- const char *loc_regeol,
- const char *loc_bostr,
- const char *loc_reg_starttry,
- const bool do_utf8)
-{
- const int docolor = *PL_colors[0] || *PL_colors[2] || *PL_colors[4];
- const int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */
- int l = (loc_regeol - locinput) > taill ? taill : (loc_regeol - locinput);
- /* The part of the string before starttry has one color
- (pref0_len chars), between starttry and current
- position another one (pref_len - pref0_len chars),
- after the current position the third one.
- We assume that pref0_len <= pref_len, otherwise we
- decrease pref0_len. */
- int pref_len = (locinput - loc_bostr) > (5 + taill) - l
- ? (5 + taill) - l : locinput - loc_bostr;
- int pref0_len;
-
- PERL_ARGS_ASSERT_DUMP_EXEC_POS;
-
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len)))
- pref_len++;
- pref0_len = pref_len - (locinput - loc_reg_starttry);
- if (l + pref_len < (5 + taill) && l < loc_regeol - locinput)
- l = ( loc_regeol - locinput > (5 + taill) - pref_len
- ? (5 + taill) - pref_len : loc_regeol - locinput);
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput + l)))
- l--;
- if (pref0_len < 0)
- pref0_len = 0;
- if (pref0_len > pref_len)
- pref0_len = pref_len;
- {
- const int is_uni = (do_utf8 && OP(scan) != CANY) ? 1 : 0;
-
- RE_PV_COLOR_DECL(s0,len0,is_uni,PERL_DEBUG_PAD(0),
- (locinput - pref_len),pref0_len, 60, 4, 5);
-
- RE_PV_COLOR_DECL(s1,len1,is_uni,PERL_DEBUG_PAD(1),
- (locinput - pref_len + pref0_len),
- pref_len - pref0_len, 60, 2, 3);
-
- RE_PV_COLOR_DECL(s2,len2,is_uni,PERL_DEBUG_PAD(2),
- locinput, loc_regeol - locinput, 10, 0, 1);
-
- const STRLEN tlen=len0+len1+len2;
- PerlIO_printf(Perl_debug_log,
- "%4"IVdf" <%.*s%.*s%s%.*s>%*s|",
- (IV)(locinput - loc_bostr),
- len0, s0,
- len1, s1,
- (docolor ? "" : "> <"),
- len2, s2,
- (int)(tlen > 19 ? 0 : 19 - tlen),
- "");
- }
-}
-
-#endif
-
-/* reg_check_named_buff_matched()
- * Checks to see if a named buffer has matched. The data array of
- * buffer numbers corresponding to the buffer is expected to reside
- * in the regexp->data->data array in the slot stored in the ARG() of
- * node involved. Note that this routine doesn't actually care about the
- * name, that information is not preserved from compilation to execution.
- * Returns the index of the leftmost defined buffer with the given name
- * or 0 if non of the buffers matched.
- */
-STATIC I32
-S_reg_check_named_buff_matched(pTHX_ const regexp *rex, const regnode *scan)
-{
- I32 n;
- RXi_GET_DECL(rex,rexi);
- SV *sv_dat= MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
-
- PERL_ARGS_ASSERT_REG_CHECK_NAMED_BUFF_MATCHED;
-
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- if ((I32)*PL_reglastparen >= nums[n] &&
- PL_regoffs[nums[n]].end != -1)
- {
- return nums[n];
- }
- }
- return 0;
-}
-
-
-/* free all slabs above current one - called during LEAVE_SCOPE */
-
-STATIC void
-S_clear_backtrack_stack(pTHX_ void *p)
-{
- regmatch_slab *s = PL_regmatch_slab->next;
- PERL_UNUSED_ARG(p);
-
- if (!s)
- return;
- PL_regmatch_slab->next = NULL;
- while (s) {
- regmatch_slab * const osl = s;
- s = s->next;
- Safefree(osl);
- }
-}
-
-
-#define SETREX(Re1,Re2) \
- if (PL_reg_eval_set) PM_SETRE((PL_reg_curpm), (Re2)); \
- Re1 = (Re2)
-
-STATIC I32 /* 0 failure, 1 success */
-S_regmatch(pTHX_ regmatch_info *reginfo, regnode *prog)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- dVAR;
- register const bool do_utf8 = PL_reg_match_utf8;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- REGEXP *rex_sv = reginfo->prog;
- regexp *rex = (struct regexp *)SvANY(rex_sv);
- RXi_GET_DECL(rex,rexi);
- I32 oldsave;
- /* the current state. This is a cached copy of PL_regmatch_state */
- register regmatch_state *st;
- /* cache heavy used fields of st in registers */
- register regnode *scan;
- register regnode *next;
- register U32 n = 0; /* general value; init to avoid compiler warning */
- register I32 ln = 0; /* len or last; init to avoid compiler warning */
- register char *locinput = PL_reginput;
- register I32 nextchr; /* is always set to UCHARAT(locinput) */
-
- bool result = 0; /* return value of S_regmatch */
- int depth = 0; /* depth of backtrack stack */
- U32 nochange_depth = 0; /* depth of GOSUB recursion with nochange */
- const U32 max_nochange_depth =
- (3 * rex->nparens > MAX_RECURSE_EVAL_NOCHANGE_DEPTH) ?
- 3 * rex->nparens : MAX_RECURSE_EVAL_NOCHANGE_DEPTH;
- regmatch_state *yes_state = NULL; /* state to pop to on success of
- subpattern */
- /* mark_state piggy backs on the yes_state logic so that when we unwind
- the stack on success we can update the mark_state as we go */
- regmatch_state *mark_state = NULL; /* last mark state we have seen */
- regmatch_state *cur_eval = NULL; /* most recent EVAL_AB state */
- struct regmatch_state *cur_curlyx = NULL; /* most recent curlyx */
- U32 state_num;
- bool no_final = 0; /* prevent failure from backtracking? */
- bool do_cutgroup = 0; /* no_final only until next branch/trie entry */
- char *startpoint = PL_reginput;
- SV *popmark = NULL; /* are we looking for a mark? */
- SV *sv_commit = NULL; /* last mark name seen in failure */
- SV *sv_yes_mark = NULL; /* last mark name we have seen
- during a successfull match */
- U32 lastopen = 0; /* last open we saw */
- bool has_cutgroup = RX_HAS_CUTGROUP(rex) ? 1 : 0;
- SV* const oreplsv = GvSV(PL_replgv);
- /* these three flags are set by various ops to signal information to
- * the very next op. They have a useful lifetime of exactly one loop
- * iteration, and are not preserved or restored by state pushes/pops
- */
- bool sw = 0; /* the condition value in (?(cond)a|b) */
- bool minmod = 0; /* the next "{n,m}" is a "{n,m}?" */
- int logical = 0; /* the following EVAL is:
- 0: (?{...})
- 1: (?(?{...})X|Y)
- 2: (??{...})
- or the following IFMATCH/UNLESSM is:
- false: plain (?=foo)
- true: used as a condition: (?(?=foo))
- */
-#ifdef DEBUGGING
- GET_RE_DEBUG_FLAGS_DECL;
-#endif
-
- PERL_ARGS_ASSERT_REGMATCH;
-
- DEBUG_OPTIMISE_r( DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,"regmatch start\n");
- }));
- /* on first ever call to regmatch, allocate first slab */
- if (!PL_regmatch_slab) {
- Newx(PL_regmatch_slab, 1, regmatch_slab);
- PL_regmatch_slab->prev = NULL;
- PL_regmatch_slab->next = NULL;
- PL_regmatch_state = SLAB_FIRST(PL_regmatch_slab);
- }
-
- oldsave = PL_savestack_ix;
- SAVEDESTRUCTOR_X(S_clear_backtrack_stack, NULL);
- SAVEVPTR(PL_regmatch_slab);
- SAVEVPTR(PL_regmatch_state);
-
- /* grab next free state slot */
- st = ++PL_regmatch_state;
- if (st > SLAB_LAST(PL_regmatch_slab))
- st = PL_regmatch_state = S_push_slab(aTHX);
-
- /* Note that nextchr is a byte even in UTF */
- nextchr = UCHARAT(locinput);
- scan = prog;
- while (scan != NULL) {
-
- DEBUG_EXECUTE_r( {
- SV * const prop = sv_newmortal();
- regnode *rnext=regnext(scan);
- DUMP_EXEC_POS( locinput, scan, do_utf8 );
- regprop(rex, prop, scan);
-
- PerlIO_printf(Perl_debug_log,
- "%3"IVdf":%*s%s(%"IVdf")\n",
- (IV)(scan - rexi->program), depth*2, "",
- SvPVX_const(prop),
- (PL_regkind[OP(scan)] == END || !rnext) ?
- 0 : (IV)(rnext - rexi->program));
- });
-
- next = scan + NEXT_OFF(scan);
- if (next == scan)
- next = NULL;
- state_num = OP(scan);
-
- REH_CALL_EXEC_NODE_HOOK(rex, scan, reginfo, st);
- reenter_switch:
-
- assert(PL_reglastparen == &rex->lastparen);
- assert(PL_reglastcloseparen == &rex->lastcloseparen);
- assert(PL_regoffs == rex->offs);
-
- switch (state_num) {
- case BOL:
- if (locinput == PL_bostr)
- {
- /* reginfo->till = reginfo->bol; */
- break;
- }
- sayNO;
- case MBOL:
- if (locinput == PL_bostr ||
- ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n'))
- {
- break;
- }
- sayNO;
- case SBOL:
- if (locinput == PL_bostr)
- break;
- sayNO;
- case GPOS:
- if (locinput == reginfo->ganch)
- break;
- sayNO;
-
- case KEEPS:
- /* update the startpoint */
- st->u.keeper.val = PL_regoffs[0].start;
- PL_reginput = locinput;
- PL_regoffs[0].start = locinput - PL_bostr;
- PUSH_STATE_GOTO(KEEPS_next, next);
- /*NOT-REACHED*/
- case KEEPS_next_fail:
- /* rollback the start point change */
- PL_regoffs[0].start = st->u.keeper.val;
- sayNO_SILENT;
- /*NOT-REACHED*/
- case EOL:
- goto seol;
- case MEOL:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- break;
- case SEOL:
- seol:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- if (PL_regeol - locinput > 1)
- sayNO;
- break;
- case EOS:
- if (PL_regeol != locinput)
- sayNO;
- break;
- case SANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
- case CANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case REG_ANY:
- if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n')
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
-
-#undef ST
-#define ST st->u.trie
- case TRIEC:
- /* In this case the charclass data is available inline so
- we can fail fast without a lot of extra overhead.
- */
- if (scan->flags == EXACT || !do_utf8) {
- if(!ANYOF_BITMAP_TEST(scan, *locinput)) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case TRIE:
- {
- /* what type of TRIE am I? (utf8 makes this contextual) */
- DECL_TRIE_TYPE(scan);
-
- /* what trie are we using right now */
- reg_trie_data * const trie
- = (reg_trie_data*)rexi->data->data[ ARG( scan ) ];
- HV * widecharmap = MUTABLE_HV(rexi->data->data[ ARG( scan ) + 1 ]);
- U32 state = trie->startstate;
-
- if (trie->bitmap && trie_type != trie_utf8_fold &&
- !TRIE_BITMAP_TEST(trie,*locinput)
- ) {
- if (trie->states[ state ].wordnum) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %smatched empty string...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- break;
- } else {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- }
- }
-
- {
- U8 *uc = ( U8* )locinput;
-
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- STRLEN bufflen=0;
- SV *sv_accept_buff = NULL;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- ST.accepted = 0; /* how many accepting states we have seen */
- ST.B = next;
- ST.jump = trie->jump;
- ST.me = scan;
- /*
- traverse the TRIE keeping track of all accepting states
- we transition through until we get to a failing node.
- */
-
- while ( state && uc <= (U8*)PL_regeol ) {
- U32 base = trie->states[ state ].trans.base;
- UV uvc = 0;
- U16 charid;
- /* We use charid to hold the wordnum as we don't use it
- for charid until after we have done the wordnum logic.
- We define an alias just so that the wordnum logic reads
- more naturally. */
-
-#define got_wordnum charid
- got_wordnum = trie->states[ state ].wordnum;
-
- if ( got_wordnum ) {
- if ( ! ST.accepted ) {
- ENTER;
- SAVETMPS; /* XXX is this necessary? dmq */
- bufflen = TRIE_INITAL_ACCEPT_BUFFLEN;
- sv_accept_buff=newSV(bufflen *
- sizeof(reg_trie_accepted) - 1);
- SvCUR_set(sv_accept_buff, 0);
- SvPOK_on(sv_accept_buff);
- sv_2mortal(sv_accept_buff);
- SAVETMPS;
- ST.accept_buff =
- (reg_trie_accepted*)SvPV_nolen(sv_accept_buff );
- }
- do {
- if (ST.accepted >= bufflen) {
- bufflen *= 2;
- ST.accept_buff =(reg_trie_accepted*)
- SvGROW(sv_accept_buff,
- bufflen * sizeof(reg_trie_accepted));
- }
- SvCUR_set(sv_accept_buff,SvCUR(sv_accept_buff)
- + sizeof(reg_trie_accepted));
-
-
- ST.accept_buff[ST.accepted].wordnum = got_wordnum;
- ST.accept_buff[ST.accepted].endpos = uc;
- ++ST.accepted;
- } while (trie->nextword && (got_wordnum= trie->nextword[got_wordnum]));
- }
-#undef got_wordnum
-
- DEBUG_TRIE_EXECUTE_r({
- DUMP_EXEC_POS( (char *)uc, scan, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%*s %sState: %4"UVxf" Accepted: %4"UVxf" ",
- 2+depth * 2, "", PL_colors[4],
- (UV)state, (UV)ST.accepted );
- });
-
- if ( base ) {
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
-
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state)
- {
- state = trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next;
- }
- else {
- state = 0;
- }
- uc += len;
-
- }
- else {
- state = 0;
- }
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "Charid:%3x CP:%4"UVxf" After State: %4"UVxf"%s\n",
- charid, uvc, (UV)state, PL_colors[5] );
- );
- }
- if (!ST.accepted )
- sayNO;
-
- DEBUG_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" possible matches%s\n",
- REPORT_CODE_OFF + depth * 2, "",
- PL_colors[4], (IV)ST.accepted, PL_colors[5] );
- );
- }}
- goto trie_first_try; /* jump into the fail handler */
- /* NOTREACHED */
- case TRIE_next_fail: /* we failed - try next alterative */
- if ( ST.jump) {
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- }
- trie_first_try:
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
-
- if ( ST.jump) {
- ST.lastparen = *PL_reglastparen;
- REGCP_SET(ST.cp);
- }
- if ( ST.accepted == 1 ) {
- /* only one choice left - just continue */
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ 0 ].wordnum-1, 0 );
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %sonly one match left: #%d <%s>%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[ 0 ].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- )
- : "not compiled under -Dr",
- PL_colors[5] );
- });
- PL_reginput = (char *)ST.accept_buff[ 0 ].endpos;
- /* in this case we free tmps/leave before we call regmatch
- as we wont be using accept_buff again. */
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- if ( !ST.jump || !ST.jump[ST.accept_buff[0].wordnum])
- scan = ST.B;
- else
- scan = ST.me + ST.jump[ST.accept_buff[0].wordnum];
- if (!has_cutgroup) {
- FREETMPS;
- LEAVE;
- } else {
- ST.accepted--;
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- }
-
- continue; /* execute rest of RE */
- }
-
- if ( !ST.accepted-- ) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sTRIE failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- FREETMPS;
- LEAVE;
- sayNO_SILENT;
- /*NOTREACHED*/
- }
-
- /*
- There are at least two accepting states left. Presumably
- the number of accepting states is going to be low,
- typically two. So we simply scan through to find the one
- with lowest wordnum. Once we find it, we swap the last
- state into its place and decrement the size. We then try to
- match the rest of the pattern at the point where the word
- ends. If we succeed, control just continues along the
- regex; if we fail we return here to try the next accepting
- state
- */
-
- {
- U32 best = 0;
- U32 cur;
- for( cur = 1 ; cur <= ST.accepted ; cur++ ) {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" (%d) as best, looking at %"IVdf" (%d)%s\n",
- REPORT_CODE_OFF + depth * 2, "", PL_colors[4],
- (IV)best, ST.accept_buff[ best ].wordnum, (IV)cur,
- ST.accept_buff[ cur ].wordnum, PL_colors[5] );
- );
-
- if (ST.accept_buff[cur].wordnum <
- ST.accept_buff[best].wordnum)
- best = cur;
- }
-
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ best ].wordnum - 1, 0 );
- regnode *nextop=(!ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) ?
- ST.B :
- ST.me + ST.jump[ST.accept_buff[best].wordnum];
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %strying alternation #%d <%s> at node #%d %s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[best].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- ) : "not compiled under -Dr",
- REG_NODE_NUM(nextop),
- PL_colors[5] );
- });
-
- if ( best<ST.accepted ) {
- reg_trie_accepted tmp = ST.accept_buff[ best ];
- ST.accept_buff[ best ] = ST.accept_buff[ ST.accepted ];
- ST.accept_buff[ ST.accepted ] = tmp;
- best = ST.accepted;
- }
- PL_reginput = (char *)ST.accept_buff[ best ].endpos;
- if ( !ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) {
- scan = ST.B;
- } else {
- scan = ST.me + ST.jump[ST.accept_buff[best].wordnum];
- }
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- /* NOTREACHED */
- }
- /* NOTREACHED */
- case TRIE_next:
- /* we dont want to throw this away, see bug 57042*/
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- FREETMPS;
- LEAVE;
- sayYES;
-#undef ST
-
- case EXACT: {
- char *s = STRING(scan);
- ln = STR_LEN(scan);
- if (do_utf8 != UTF) {
- /* The target and the pattern have differing utf8ness. */
- char *l = locinput;
- const char * const e = s + ln;
-
- if (do_utf8) {
- /* The target is utf8, the pattern is not utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*(U8*)s) !=
- utf8n_to_uvuni((U8*)l, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- l += ulen;
- s ++;
- }
- }
- else {
- /* The target is not utf8, the pattern is utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*((U8*)l)) !=
- utf8n_to_uvuni((U8*)s, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- s += ulen;
- l ++;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
- /* The target and the pattern have the same utf8ness. */
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr)
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && memNE(s, locinput, ln))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case EXACTFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case EXACTF: {
- char * const s = STRING(scan);
- ln = STR_LEN(scan);
-
- if (do_utf8 || UTF) {
- /* Either target or the pattern are utf8. */
- const char * const l = locinput;
- char *e = PL_regeol;
-
- if (ibcmp_utf8(s, 0, ln, (bool)UTF,
- l, &e, 0, do_utf8)) {
- /* One more case for the sharp s:
- * pack("U0U*", 0xDF) =~ /ss/i,
- * the 0xC3 0x9F are the UTF-8
- * byte sequence for the U+00DF. */
-
- if (!(do_utf8 &&
- toLOWER(s[0]) == 's' &&
- ln >= 2 &&
- toLOWER(s[1]) == 's' &&
- (U8)l[0] == 0xC3 &&
- e - l >= 2 &&
- (U8)l[1] == 0x9F))
- sayNO;
- }
- locinput = e;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Neither the target and the pattern are utf8. */
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- UCHARAT(s) != ((OP(scan) == EXACTF)
- ? PL_fold : PL_fold_locale)[nextchr])
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && (OP(scan) == EXACTF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln)))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case BOUNDL:
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- case NBOUND:
- /* was last char in word? */
- if (do_utf8) {
- if (locinput == PL_bostr)
- ln = '\n';
- else {
- const U8 * const r = reghop3((U8*)locinput, -1, (U8*)PL_bostr);
-
- ln = utf8n_to_uvchr(r, UTF8SKIP(r), 0, uniflags);
- }
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM_uni(ln);
- LOAD_UTF8_CHARCLASS_ALNUM();
- n = swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8);
- }
- else {
- ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln));
- n = isALNUM_LC_utf8((U8*)locinput);
- }
- }
- else {
- ln = (locinput != PL_bostr) ?
- UCHARAT(locinput - 1) : '\n';
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM(ln);
- n = isALNUM(nextchr);
- }
- else {
- ln = isALNUM_LC(ln);
- n = isALNUM_LC(nextchr);
- }
- }
- if (((!ln) == (!n)) == (OP(scan) == BOUND ||
- OP(scan) == BOUNDL))
- sayNO;
- break;
- case ANYOF:
- if (do_utf8) {
- STRLEN inclasslen = PL_regeol - locinput;
-
- if (!reginclass(rex, scan, (U8*)locinput, &inclasslen, do_utf8))
- goto anyof_fail;
- if (locinput >= PL_regeol)
- sayNO;
- locinput += inclasslen ? inclasslen : UTF8SKIP(locinput);
- nextchr = UCHARAT(locinput);
- break;
- }
- else {
- if (nextchr < 0)
- nextchr = UCHARAT(locinput);
- if (!REGINCLASS(rex, scan, (U8*)locinput))
- goto anyof_fail;
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- }
- anyof_fail:
- /* If we might have the case of the German sharp s
- * in a casefolding Unicode character class. */
-
- if (ANYOF_FOLD_SHARP_S(scan, locinput, PL_regeol)) {
- locinput += SHARP_S_SKIP;
- nextchr = UCHARAT(locinput);
- }
- else
- sayNO;
- break;
- /* Special char classes - The defines start on line 129 or so */
- CCC_TRY_AFF( ALNUM, ALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
- CCC_TRY_NEG(NALNUM, NALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
-
- CCC_TRY_AFF( SPACE, SPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
- CCC_TRY_NEG(NSPACE, NSPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
-
- CCC_TRY_AFF( DIGIT, DIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
- CCC_TRY_NEG(NDIGIT, NDIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
-
- case CLUMP: /* Match \X: logical Unicode character. This is defined as
- a Unicode extended Grapheme Cluster */
- /* From http://www.unicode.org/reports/tr29 (5.2 version). An
- extended Grapheme Cluster is:
-
- CR LF
- | Prepend* Begin Extend*
- | .
-
- Begin is (Hangul-syllable | ! Control)
- Extend is (Grapheme_Extend | Spacing_Mark)
- Control is [ GCB_Control CR LF ]
-
- The discussion below shows how the code for CLUMP is derived
- from this regex. Note that most of these concepts are from
- property values of the Grapheme Cluster Boundary (GCB) property.
- No code point can have multiple property values for a given
- property. Thus a code point in Prepend can't be in Control, but
- it must be in !Control. This is why Control above includes
- GCB_Control plus CR plus LF. The latter two are used in the GCB
- property separately, and so can't be in GCB_Control, even though
- they logically are controls. Control is not the same as gc=cc,
- but includes format and other characters as well.
-
- The Unicode definition of Hangul-syllable is:
- L+
- | (L* ( ( V | LV ) V* | LVT ) T*)
- | T+
- )
- Each of these is a value for the GCB property, and hence must be
- disjoint, so the order they are tested is immaterial, so the
- above can safely be changed to
- T+
- | L+
- | (L* ( LVT | ( V | LV ) V*) T*)
-
- The last two terms can be combined like this:
- L* ( L
- | (( LVT | ( V | LV ) V*) T*))
-
- And refactored into this:
- L* (L | LVT T* | V V* T* | LV V* T*)
-
- That means that if we have seen any L's at all we can quit
- there, but if the next character is a LVT, a V or and LV we
- should keep going.
-
- There is a subtlety with Prepend* which showed up in testing.
- Note that the Begin, and only the Begin is required in:
- | Prepend* Begin Extend*
- Also, Begin contains '! Control'. A Prepend must be a '!
- Control', which means it must be a Begin. What it comes down to
- is that if we match Prepend* and then find no suitable Begin
- afterwards, that if we backtrack the last Prepend, that one will
- be a suitable Begin.
- */
-
- if (locinput >= PL_regeol)
- sayNO;
- if (! do_utf8) {
-
- /* Match either CR LF or '.', as all the other possibilities
- * require utf8 */
- locinput++; /* Match the . or CR */
- if (nextchr == '\r'
- && locinput < PL_regeol
- && UCHARAT(locinput) == '\n') locinput++;
- }
- else {
-
- /* Utf8: See if is ( CR LF ); already know that locinput <
- * PL_regeol, so locinput+1 is in bounds */
- if (nextchr == '\r' && UCHARAT(locinput + 1) == '\n') {
- locinput += 2;
- }
- else {
- /* In case have to backtrack to beginning, then match '.' */
- char *starting = locinput;
-
- /* In case have to backtrack the last prepend */
- char *previous_prepend = 0;
-
- LOAD_UTF8_CHARCLASS_GCB();
-
- /* Match (prepend)* */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_prepend,
- (U8*)locinput, do_utf8))
- {
- previous_prepend = locinput;
- locinput += UTF8SKIP(locinput);
- }
-
- /* As noted above, if we matched a prepend character, but
- * the next thing won't match, back off the last prepend we
- * matched, as it is guaranteed to match the begin */
- if (previous_prepend
- && (locinput >= PL_regeol
- || ! swash_fetch(PL_utf8_X_begin,
- (U8*)locinput, do_utf8)))
- {
- locinput = previous_prepend;
- }
-
- /* Note that here we know PL_regeol > locinput, as we
- * tested that upon input to this switch case, and if we
- * moved locinput forward, we tested the result just above
- * and it either passed, or we backed off so that it will
- * now pass */
- if (! swash_fetch(PL_utf8_X_begin, (U8*)locinput, do_utf8)) {
-
- /* Here did not match the required 'Begin' in the
- * second term. So just match the very first
- * character, the '.' of the final term of the regex */
- locinput = starting + UTF8SKIP(starting);
- } else {
-
- /* Here is the beginning of a character that can have
- * an extender. It is either a hangul syllable, or a
- * non-control */
- if (swash_fetch(PL_utf8_X_non_hangul,
- (U8*)locinput, do_utf8))
- {
-
- /* Here not a Hangul syllable, must be a
- * ('! * Control') */
- locinput += UTF8SKIP(locinput);
- } else {
-
- /* Here is a Hangul syllable. It can be composed
- * of several individual characters. One
- * possibility is T+ */
- if (swash_fetch(PL_utf8_X_T,
- (U8*)locinput, do_utf8))
- {
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_T,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- } else {
-
- /* Here, not T+, but is a Hangul. That means
- * it is one of the others: L, LV, LVT or V,
- * and matches:
- * L* (L | LVT T* | V V* T* | LV V* T*) */
-
- /* Match L* */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_L,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
-
- /* Here, have exhausted L*. If the next
- * character is not an LV, LVT nor V, it means
- * we had to have at least one L, so matches L+
- * in the original equation, we have a complete
- * hangul syllable. Are done. */
-
- if (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_LV_LVT_V,
- (U8*)locinput, do_utf8))
- {
-
- /* Otherwise keep going. Must be LV, LVT
- * or V. See if LVT */
- if (swash_fetch(PL_utf8_X_LVT,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- } else {
-
- /* Must be V or LV. Take it, then
- * match V* */
- locinput += UTF8SKIP(locinput);
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_V,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- }
-
- /* And any of LV, LVT, or V can be followed
- * by T* */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_T,
- (U8*)locinput,
- do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- }
- }
- }
-
- /* Match any extender */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_extend,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- }
- }
- if (locinput > PL_regeol) sayNO;
- }
- nextchr = UCHARAT(locinput);
- break;
-
- case NREFFL:
- {
- char *s;
- char type;
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NREF:
- case NREFF:
- type = OP(scan);
- n = reg_check_named_buff_matched(rex,scan);
-
- if ( n ) {
- type = REF + ( type - NREF );
- goto do_ref;
- } else {
- sayNO;
- }
- /* unreached */
- case REFFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case REF:
- case REFF:
- n = ARG(scan); /* which paren pair */
- type = OP(scan);
- do_ref:
- ln = PL_regoffs[n].start;
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (*PL_reglastparen < n || ln == -1)
- sayNO; /* Do not match unless seen CLOSEn. */
- if (ln == PL_regoffs[n].end)
- break;
-
- s = PL_bostr + ln;
- if (do_utf8 && type != REF) { /* REF can do byte comparison */
- char *l = locinput;
- const char *e = PL_bostr + PL_regoffs[n].end;
- /*
- * Note that we can't do the "other character" lookup trick as
- * in the 8-bit case (no pun intended) because in Unicode we
- * have to map both upper and title case to lower case.
- */
- if (type == REFF) {
- while (s < e) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- if (l >= PL_regeol)
- sayNO;
- toLOWER_utf8((U8*)s, tmpbuf1, &ulen1);
- toLOWER_utf8((U8*)l, tmpbuf2, &ulen2);
- if (ulen1 != ulen2 || memNE((char *)tmpbuf1, (char *)tmpbuf2, ulen1))
- sayNO;
- s += ulen1;
- l += ulen2;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- (type == REF ||
- (UCHARAT(s) != (type == REFF
- ? PL_fold : PL_fold_locale)[nextchr])))
- sayNO;
- ln = PL_regoffs[n].end - ln;
- if (locinput + ln > PL_regeol)
- sayNO;
- if (ln > 1 && (type == REF
- ? memNE(s, locinput, ln)
- : (type == REFF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln))))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case NOTHING:
- case TAIL:
- break;
- case BACK:
- break;
-
-#undef ST
-#define ST st->u.eval
- {
- SV *ret;
- REGEXP *re_sv;
- regexp *re;
- regexp_internal *rei;
- regnode *startpoint;
-
- case GOSTART:
- case GOSUB: /* /(...(?1))/ /(...(?&foo))/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if (cur_eval->u.eval.close_paren == (U32)ARG(scan))
- Perl_croak(aTHX_ "Infinite recursion in regex");
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_
- "Pattern subroutine nesting without pos change"
- " exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- re_sv = rex_sv;
- re = rex;
- rei = rexi;
- (void)ReREFCNT_inc(rex_sv);
- if (OP(scan)==GOSUB) {
- startpoint = scan + ARG2L(scan);
- ST.close_paren = ARG(scan);
- } else {
- startpoint = rei->program+1;
- ST.close_paren = 0;
- }
- goto eval_recurse_doit;
- /* NOTREACHED */
- case EVAL: /* /(?{A})B/ /(??{A})B/ and /(?(?{A})X|Y)B/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_ "EVAL without pos change exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- {
- /* execute the code in the {...} */
- dSP;
- SV ** const before = SP;
- OP_4tree * const oop = PL_op;
- COP * const ocurcop = PL_curcop;
- PAD *old_comppad;
- char *saved_regeol = PL_regeol;
-
- n = ARG(scan);
- PL_op = (OP_4tree*)rexi->data->data[n];
- DEBUG_STATE_r( PerlIO_printf(Perl_debug_log,
- " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) );
- PAD_SAVE_LOCAL(old_comppad, (PAD*)rexi->data->data[n + 2]);
- PL_regoffs[0].end = PL_reg_magic->mg_len = locinput - PL_bostr;
-
- if (sv_yes_mark) {
- SV *sv_mrk = get_sv("REGMARK", 1);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- CALLRUNOPS(aTHX); /* Scalar context. */
- SPAGAIN;
- if (SP == before)
- ret = &PL_sv_undef; /* protect against empty (?{}) blocks. */
- else {
- ret = POPs;
- PUTBACK;
- }
-
- PL_op = oop;
- PAD_RESTORE_LOCAL(old_comppad);
- PL_curcop = ocurcop;
- PL_regeol = saved_regeol;
- if (!logical) {
- /* /(?{...})/ */
- sv_setsv(save_scalar(PL_replgv), ret);
- break;
- }
- }
- if (logical == 2) { /* Postponed subexpression: /(??{...})/ */
- logical = 0;
- {
- /* extract RE object from returned value; compiling if
- * necessary */
- MAGIC *mg = NULL;
- REGEXP *rx = NULL;
-
- if (SvROK(ret)) {
- SV *const sv = SvRV(ret);
-
- if (SvTYPE(sv) == SVt_REGEXP) {
- rx = (REGEXP*) sv;
- } else if (SvSMAGICAL(sv)) {
- mg = mg_find(sv, PERL_MAGIC_qr);
- assert(mg);
- }
- } else if (SvTYPE(ret) == SVt_REGEXP) {
- rx = (REGEXP*) ret;
- } else if (SvSMAGICAL(ret)) {
- if (SvGMAGICAL(ret)) {
- /* I don't believe that there is ever qr magic
- here. */
- assert(!mg_find(ret, PERL_MAGIC_qr));
- sv_unmagic(ret, PERL_MAGIC_qr);
- }
- else {
- mg = mg_find(ret, PERL_MAGIC_qr);
- /* testing suggests mg only ends up non-NULL for
- scalars who were upgraded and compiled in the
- else block below. In turn, this is only
- triggered in the "postponed utf8 string" tests
- in t/op/pat.t */
- }
- }
-
- if (mg) {
- rx = (REGEXP *) mg->mg_obj; /*XXX:dmq*/
- assert(rx);
- }
- if (rx) {
- rx = reg_temp_copy(NULL, rx);
- }
- else {
- U32 pm_flags = 0;
- const I32 osize = PL_regsize;
-
- if (DO_UTF8(ret)) {
- assert (SvUTF8(ret));
- } else if (SvUTF8(ret)) {
- /* Not doing UTF-8, despite what the SV says. Is
- this only if we're trapped in use 'bytes'? */
- /* Make a copy of the octet sequence, but without
- the flag on, as the compiler now honours the
- SvUTF8 flag on ret. */
- STRLEN len;
- const char *const p = SvPV(ret, len);
- ret = newSVpvn_flags(p, len, SVs_TEMP);
- }
- rx = CALLREGCOMP(ret, pm_flags);
- if (!(SvFLAGS(ret)
- & (SVs_TEMP | SVs_PADTMP | SVf_READONLY
- | SVs_GMG))) {
- /* This isn't a first class regexp. Instead, it's
- caching a regexp onto an existing, Perl visible
- scalar. */
- sv_magic(ret, MUTABLE_SV(rx), PERL_MAGIC_qr, 0, 0);
- }
- PL_regsize = osize;
- }
- re_sv = rx;
- re = (struct regexp *)SvANY(rx);
- }
- RXp_MATCH_COPIED_off(re);
- re->subbeg = rex->subbeg;
- re->sublen = rex->sublen;
- rei = RXi_GET(re);
- DEBUG_EXECUTE_r(
- debug_start_match(re_sv, do_utf8, locinput, PL_regeol,
- "Matching embedded");
- );
- startpoint = rei->program + 1;
- ST.close_paren = 0; /* only used for GOSUB */
- /* borrowed from regtry */
- if (PL_reg_start_tmpl <= re->nparens) {
- PL_reg_start_tmpl = re->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- eval_recurse_doit: /* Share code with GOSUB below this line */
- /* run the pattern returned from (??{...}) */
- ST.cp = regcppush(0); /* Save *all* the positions. */
- REGCP_SET(ST.lastcp);
-
- PL_regoffs = re->offs; /* essentially NOOP on GOSUB */
-
- /* see regtry, specifically PL_reglast(?:close)?paren is a pointer! (i dont know why) :dmq */
- PL_reglastparen = &re->lastparen;
- PL_reglastcloseparen = &re->lastcloseparen;
- re->lastparen = 0;
- re->lastcloseparen = 0;
-
- PL_reginput = locinput;
- PL_regsize = 0;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
-
- ST.toggle_reg_flags = PL_reg_flags;
- if (RX_UTF8(re_sv))
- PL_reg_flags |= RF_utf8;
- else
- PL_reg_flags &= ~RF_utf8;
- ST.toggle_reg_flags ^= PL_reg_flags; /* diff of old and new */
-
- ST.prev_rex = rex_sv;
- ST.prev_curlyx = cur_curlyx;
- SETREX(rex_sv,re_sv);
- rex = re;
- rexi = rei;
- cur_curlyx = NULL;
- ST.B = next;
- ST.prev_eval = cur_eval;
- cur_eval = st;
- /* now continue from first node in postoned RE */
- PUSH_YES_STATE_GOTO(EVAL_AB, startpoint);
- /* NOTREACHED */
- }
- /* logical is 1, /(?(?{...})X|Y)/ */
- sw = (bool)SvTRUE(ret);
- logical = 0;
- break;
- }
-
- case EVAL_AB: /* cleanup after a successful (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- regcpblow(ST.cp);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
- /* also update PL_regoffs */
- PL_regoffs = rex->offs;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayYES;
-
-
- case EVAL_AB_fail: /* unsuccessfully ran A or B in (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- PL_reginput = locinput;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayNO_SILENT;
-#undef ST
-
- case OPEN:
- n = ARG(scan); /* which paren pair */
- PL_reg_start_tmp[n] = locinput;
- if (n > PL_regsize)
- PL_regsize = n;
- lastopen = n;
- break;
- case CLOSE:
- n = ARG(scan); /* which paren pair */
- PL_regoffs[n].start = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if (cur_eval && cur_eval->u.eval.close_paren == n) {
- goto fake_end;
- }
- break;
- case ACCEPT:
- if (ARG(scan)){
- regnode *cursor;
- for (cursor=scan;
- cursor && OP(cursor)!=END;
- cursor=regnext(cursor))
- {
- if ( OP(cursor)==CLOSE ){
- n = ARG(cursor);
- if ( n <= lastopen ) {
- PL_regoffs[n].start
- = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if ( n == ARG(scan) || (cur_eval &&
- cur_eval->u.eval.close_paren == n))
- break;
- }
- }
- }
- }
- goto fake_end;
- /*NOTREACHED*/
- case GROUPP:
- n = ARG(scan); /* which paren pair */
- sw = (bool)(*PL_reglastparen >= n && PL_regoffs[n].end != -1);
- break;
- case NGROUPP:
- /* reg_check_named_buff_matched returns 0 for no match */
- sw = (bool)(0 < reg_check_named_buff_matched(rex,scan));
- break;
- case INSUBP:
- n = ARG(scan);
- sw = (cur_eval && (!n || cur_eval->u.eval.close_paren == n));
- break;
- case DEFINEP:
- sw = 0;
- break;
- case IFTHEN:
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (sw)
- next = NEXTOPER(NEXTOPER(scan));
- else {
- next = scan + ARG(scan);
- if (OP(next) == IFTHEN) /* Fake one. */
- next = NEXTOPER(NEXTOPER(next));
- }
- break;
- case LOGICAL:
- logical = scan->flags;
- break;
-
-/*******************************************************************
-
-The CURLYX/WHILEM pair of ops handle the most generic case of the /A*B/
-pattern, where A and B are subpatterns. (For simple A, CURLYM or
-STAR/PLUS/CURLY/CURLYN are used instead.)
-
-A*B is compiled as <CURLYX><A><WHILEM><B>
-
-On entry to the subpattern, CURLYX is called. This pushes a CURLYX
-state, which contains the current count, initialised to -1. It also sets
-cur_curlyx to point to this state, with any previous value saved in the
-state block.
-
-CURLYX then jumps straight to the WHILEM op, rather than executing A,
-since the pattern may possibly match zero times (i.e. it's a while {} loop
-rather than a do {} while loop).
-
-Each entry to WHILEM represents a successful match of A. The count in the
-CURLYX block is incremented, another WHILEM state is pushed, and execution
-passes to A or B depending on greediness and the current count.
-
-For example, if matching against the string a1a2a3b (where the aN are
-substrings that match /A/), then the match progresses as follows: (the
-pushed states are interspersed with the bits of strings matched so far):
-
- <CURLYX cnt=-1>
- <CURLYX cnt=0><WHILEM>
- <CURLYX cnt=1><WHILEM> a1 <WHILEM>
- <CURLYX cnt=2><WHILEM> a1 <WHILEM> a2 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> b
-
-(Contrast this with something like CURLYM, which maintains only a single
-backtrack state:
-
- <CURLYM cnt=0> a1
- a1 <CURLYM cnt=1> a2
- a1 a2 <CURLYM cnt=2> a3
- a1 a2 a3 <CURLYM cnt=3> b
-)
-
-Each WHILEM state block marks a point to backtrack to upon partial failure
-of A or B, and also contains some minor state data related to that
-iteration. The CURLYX block, pointed to by cur_curlyx, contains the
-overall state, such as the count, and pointers to the A and B ops.
-
-This is complicated slightly by nested CURLYX/WHILEM's. Since cur_curlyx
-must always point to the *current* CURLYX block, the rules are:
-
-When executing CURLYX, save the old cur_curlyx in the CURLYX state block,
-and set cur_curlyx to point the new block.
-
-When popping the CURLYX block after a successful or unsuccessful match,
-restore the previous cur_curlyx.
-
-When WHILEM is about to execute B, save the current cur_curlyx, and set it
-to the outer one saved in the CURLYX block.
-
-When popping the WHILEM block after a successful or unsuccessful B match,
-restore the previous cur_curlyx.
-
-Here's an example for the pattern (AI* BI)*BO
-I and O refer to inner and outer, C and W refer to CURLYX and WHILEM:
-
-cur_
-curlyx backtrack stack
------- ---------------
-NULL
-CO <CO prev=NULL> <WO>
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-NULL <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi <WO prev=CO> bo
-
-At this point the pattern succeeds, and we work back down the stack to
-clean up, restoring as we go:
-
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO>
-NULL
-
-*******************************************************************/
-
-#define ST st->u.curlyx
-
- case CURLYX: /* start of /A*B/ (for complex A) */
- {
- /* No need to save/restore up to this paren */
- I32 parenfloor = scan->flags;
-
- assert(next); /* keep Coverity happy */
- if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */
- next += ARG(next);
-
- /* XXXX Probably it is better to teach regpush to support
- parenfloor > PL_regsize... */
- if (parenfloor > (I32)*PL_reglastparen)
- parenfloor = *PL_reglastparen; /* Pessimization... */
-
- ST.prev_curlyx= cur_curlyx;
- cur_curlyx = st;
- ST.cp = PL_savestack_ix;
-
- /* these fields contain the state of the current curly.
- * they are accessed by subsequent WHILEMs */
- ST.parenfloor = parenfloor;
- ST.min = ARG1(scan);
- ST.max = ARG2(scan);
- ST.A = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- ST.B = next;
- ST.minmod = minmod;
- minmod = 0;
- ST.count = -1; /* this will be updated by WHILEM */
- ST.lastloc = NULL; /* this will be updated by WHILEM */
-
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYX_end, PREVOPER(next));
- /* NOTREACHED */
- }
-
- case CURLYX_end: /* just finished matching all of A*B */
- cur_curlyx = ST.prev_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case CURLYX_end_fail: /* just failed to match all of A*B */
- regcpblow(ST.cp);
- cur_curlyx = ST.prev_curlyx;
- sayNO;
- /* NOTREACHED */
-
-
-#undef ST
-#define ST st->u.whilem
-
- case WHILEM: /* just matched an A in /A*B/ (for complex A) */
- {
- /* see the discussion above about CURLYX/WHILEM */
- I32 n;
- assert(cur_curlyx); /* keep Coverity happy */
- n = ++cur_curlyx->u.curlyx.count; /* how many A's matched */
- ST.save_lastloc = cur_curlyx->u.curlyx.lastloc;
- ST.cache_offset = 0;
- ST.cache_mask = 0;
-
- PL_reginput = locinput;
-
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: matched %ld out of %ld..%ld\n",
- REPORT_CODE_OFF+depth*2, "", (long)n,
- (long)cur_curlyx->u.curlyx.min,
- (long)cur_curlyx->u.curlyx.max)
- );
-
- /* First just match a string of min A's. */
-
- if (n < cur_curlyx->u.curlyx.min) {
- cur_curlyx->u.curlyx.lastloc = locinput;
- PUSH_STATE_GOTO(WHILEM_A_pre, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
-
- /* If degenerate A matches "", assume A done. */
-
- if (locinput == cur_curlyx->u.curlyx.lastloc) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: empty match detected, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- goto do_whilem_B_max;
- }
-
- /* super-linear cache processing */
-
- if (scan->flags) {
-
- if (!PL_reg_maxiter) {
- /* start the countdown: Postpone detection until we
- * know the match is not *that* much linear. */
- PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4);
- /* possible overflow for long strings and many CURLYX's */
- if (PL_reg_maxiter < 0)
- PL_reg_maxiter = I32_MAX;
- PL_reg_leftiter = PL_reg_maxiter;
- }
-
- if (PL_reg_leftiter-- == 0) {
- /* initialise cache */
- const I32 size = (PL_reg_maxiter + 7)/8;
- if (PL_reg_poscache) {
- if ((I32)PL_reg_poscache_size < size) {
- Renew(PL_reg_poscache, size, char);
- PL_reg_poscache_size = size;
- }
- Zero(PL_reg_poscache, size, char);
- }
- else {
- PL_reg_poscache_size = size;
- Newxz(PL_reg_poscache, size, char);
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%swhilem: Detected a super-linear match, switching on caching%s...\n",
- PL_colors[4], PL_colors[5])
- );
- }
-
- if (PL_reg_leftiter < 0) {
- /* have we already failed at this position? */
- I32 offset, mask;
- offset = (scan->flags & 0xf) - 1
- + (locinput - PL_bostr) * (scan->flags>>4);
- mask = 1 << (offset % 8);
- offset /= 8;
- if (PL_reg_poscache[offset] & mask) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: (cache) already tried at this position...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- sayNO; /* cache records failure */
- }
- ST.cache_offset = offset;
- ST.cache_mask = mask;
- }
- }
-
- /* Prefer B over A for minimal matching. */
-
- if (cur_curlyx->u.curlyx.minmod) {
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- ST.cp = regcppush(ST.save_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_YES_STATE_GOTO(WHILEM_B_min, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
- }
-
- /* Prefer A over B for maximal matching. */
-
- if (n < cur_curlyx->u.curlyx.max) { /* More greed allowed? */
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- cur_curlyx->u.curlyx.lastloc = locinput;
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_max, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
- goto do_whilem_B_max;
- }
- /* NOTREACHED */
-
- case WHILEM_B_min: /* just matched B in a minimal match */
- case WHILEM_B_max: /* just matched B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case WHILEM_B_max_fail: /* just failed to match B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_min_fail: /* just failed to match A in a minimal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- /* FALL THROUGH */
- case WHILEM_A_pre_fail: /* just failed to match even minimal A */
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_max_fail: /* just failed to match A in a maximal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex); /* Restore some previous $<digit>s? */
- PL_reginput = locinput;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s whilem: failed, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- do_whilem_B_max:
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
-
- /* now try B */
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- PUSH_YES_STATE_GOTO(WHILEM_B_max, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
-
- case WHILEM_B_min_fail: /* just failed to match B in a minimal match */
- cur_curlyx = ST.save_curlyx;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
-
- if (cur_curlyx->u.curlyx.count >= cur_curlyx->u.curlyx.max) {
- /* Maximum greed exceeded */
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP),
- "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s trying longer...\n", REPORT_CODE_OFF+depth*2, "")
- );
- /* Try grabbing another A and see if it helps. */
- PL_reginput = locinput;
- cur_curlyx->u.curlyx.lastloc = locinput;
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_min, ST.save_curlyx->u.curlyx.A);
- /* NOTREACHED */
-
-#undef ST
-#define ST st->u.branch
-
- case BRANCHJ: /* /(...|A|...)/ with long next pointer */
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- scan = NEXTOPER(scan);
- /* FALL THROUGH */
-
- case BRANCH: /* /(...|A|...)/ */
- scan = NEXTOPER(scan); /* scan now points to inner node */
- ST.lastparen = *PL_reglastparen;
- ST.next_branch = next;
- REGCP_SET(ST.cp);
- PL_reginput = locinput;
-
- /* Now go into the branch */
- if (has_cutgroup) {
- PUSH_YES_STATE_GOTO(BRANCH_next, scan);
- } else {
- PUSH_STATE_GOTO(BRANCH_next, scan);
- }
- /* NOTREACHED */
- case CUTGROUP:
- PL_reginput = locinput;
- sv_yes_mark = st->u.mark.mark_name = scan->flags ? NULL :
- MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(CUTGROUP_next,next);
- /* NOTREACHED */
- case CUTGROUP_next_fail:
- do_cutgroup = 1;
- no_final = 1;
- if (st->u.mark.mark_name)
- sv_commit = st->u.mark.mark_name;
- sayNO;
- /* NOTREACHED */
- case BRANCH_next:
- sayYES;
- /* NOTREACHED */
- case BRANCH_next_fail: /* that branch failed; try the next, if any */
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- /*dmq: *PL_reglastcloseparen = n; */
- scan = ST.next_branch;
- /* no more branches? */
- if (!scan || (OP(scan) != BRANCH && OP(scan) != BRANCHJ)) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sBRANCH failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- sayNO_SILENT;
- }
- continue; /* execute next BRANCH[J] op */
- /* NOTREACHED */
-
- case MINMOD:
- minmod = 1;
- break;
-
-#undef ST
-#define ST st->u.curlym
-
- case CURLYM: /* /A{m,n}B/ where A is fixed-length */
-
- /* This is an optimisation of CURLYX that enables us to push
- * only a single backtracking state, no matter how many matches
- * there are in {m,n}. It relies on the pattern being constant
- * length, with no parens to influence future backrefs
- */
-
- ST.me = scan;
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
-
- /* if paren positive, emulate an OPEN/CLOSE around A */
- if (ST.me->flags) {
- U32 paren = ST.me->flags;
- if (paren > PL_regsize)
- PL_regsize = paren;
- if (paren > *PL_reglastparen)
- *PL_reglastparen = paren;
- scan += NEXT_OFF(scan); /* Skip former OPEN. */
- }
- ST.A = scan;
- ST.B = next;
- ST.alen = 0;
- ST.count = 0;
- ST.minmod = minmod;
- minmod = 0;
- ST.c1 = CHRTEST_UNINIT;
- REGCP_SET(ST.cp);
-
- if (!(ST.minmod ? ARG1(ST.me) : ARG2(ST.me))) /* min/max */
- goto curlym_do_B;
-
- curlym_do_A: /* execute the A in /A{m,n}B/ */
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYM_A, ST.A); /* match A */
- /* NOTREACHED */
-
- case CURLYM_A: /* we've just matched an A */
- locinput = st->locinput;
- nextchr = UCHARAT(locinput);
-
- ST.count++;
- /* after first match, determine A's length: u.curlym.alen */
- if (ST.count == 1) {
- if (PL_reg_match_utf8) {
- char *s = locinput;
- while (s < PL_reginput) {
- ST.alen++;
- s += UTF8SKIP(s);
- }
- }
- else {
- ST.alen = PL_reginput - locinput;
- }
- if (ST.alen == 0)
- ST.count = ST.minmod ? ARG1(ST.me) : ARG2(ST.me);
- }
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM now matched %"IVdf" times, len=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)), "",
- (IV) ST.count, (IV)ST.alen)
- );
-
- locinput = PL_reginput;
-
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- goto fake_end;
-
- {
- I32 max = (ST.minmod ? ARG1(ST.me) : ARG2(ST.me));
- if ( max == REG_INFTY || ST.count < max )
- goto curlym_do_A; /* try to match another A */
- }
- goto curlym_do_B; /* try to match B */
-
- case CURLYM_A_fail: /* just failed to match an A */
- REGCP_UNWIND(ST.cp);
-
- if (ST.minmod || ST.count < ARG1(ST.me) /* min*/
- || (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags))
- sayNO;
-
- curlym_do_B: /* execute the B in /A{m,n}B/ */
- PL_reginput = locinput;
- if (ST.c1 == CHRTEST_UNINIT) {
- /* calculate c1 and c2 for possible match of 1st char
- * following curly */
- ST.c1 = ST.c2 = CHRTEST_VOID;
- if (HAS_TEXT(ST.B) || JUMPABLE(ST.B)) {
- regnode *text_node = ST.B;
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
- /* this used to be
-
- (HAS_TEXT(text_node) && PL_regkind[OP(text_node)] == EXACT)
-
- But the former is redundant in light of the latter.
-
- if this changes back then the macro for
- IS_TEXT and friends need to change.
- */
- if (PL_regkind[OP(text_node)] == EXACT)
- {
-
- ST.c1 = (U8)*STRING(text_node);
- ST.c2 =
- (IS_TEXTF(text_node))
- ? PL_fold[ST.c1]
- : (IS_TEXTFL(text_node))
- ? PL_fold_locale[ST.c1]
- : ST.c1;
- }
- }
- }
-
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM trying tail with matches=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)),
- "", (IV)ST.count)
- );
- if (ST.c1 != CHRTEST_VOID
- && UCHARAT(PL_reginput) != ST.c1
- && UCHARAT(PL_reginput) != ST.c2)
- {
- /* simulate B failing */
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM Fast bail c1=%"IVdf" c2=%"IVdf"\n",
- (int)(REPORT_CODE_OFF+(depth*2)),"",
- (IV)ST.c1,(IV)ST.c2
- ));
- state_num = CURLYM_B_fail;
- goto reenter_switch;
- }
-
- if (ST.me->flags) {
- /* mark current A as captured */
- I32 paren = ST.me->flags;
- if (ST.count) {
- PL_regoffs[paren].start
- = HOPc(PL_reginput, -ST.alen) - PL_bostr;
- PL_regoffs[paren].end = PL_reginput - PL_bostr;
- /*dmq: *PL_reglastcloseparen = paren; */
- }
- else
- PL_regoffs[paren].end = -1;
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- {
- if (ST.count)
- goto fake_end;
- else
- sayNO;
- }
- }
-
- PUSH_STATE_GOTO(CURLYM_B, ST.B); /* match B */
- /* NOTREACHED */
-
- case CURLYM_B_fail: /* just failed to match a B */
- REGCP_UNWIND(ST.cp);
- if (ST.minmod) {
- I32 max = ARG2(ST.me);
- if (max != REG_INFTY && ST.count == max)
- sayNO;
- goto curlym_do_A; /* try to match a further A */
- }
- /* backtrack one A */
- if (ST.count == ARG1(ST.me) /* min */)
- sayNO;
- ST.count--;
- locinput = HOPc(locinput, -ST.alen);
- goto curlym_do_B; /* try to match B */
-
-#undef ST
-#define ST st->u.curly
-
-#define CURLY_SETPAREN(paren, success) \
- if (paren) { \
- if (success) { \
- PL_regoffs[paren].start = HOPc(locinput, -1) - PL_bostr; \
- PL_regoffs[paren].end = locinput - PL_bostr; \
- *PL_reglastcloseparen = paren; \
- } \
- else \
- PL_regoffs[paren].end = -1; \
- }
-
- case STAR: /* /A*B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 0;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case PLUS: /* /A+B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 1;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case CURLYN: /* /(A){m,n}B/ where A is width 1 */
- ST.paren = scan->flags; /* Which paren to set */
- if (ST.paren > PL_regsize)
- PL_regsize = ST.paren;
- if (ST.paren > *PL_reglastparen)
- *PL_reglastparen = ST.paren;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- ST.min=1;
- ST.max=1;
- }
- scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE);
- goto repeat;
- case CURLY: /* /A{m,n}B/ where A is width 1 */
- ST.paren = 0;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
- repeat:
- /*
- * Lookahead to avoid useless match attempts
- * when we know what character comes next.
- *
- * Used to only do .*x and .*?x, but now it allows
- * for )'s, ('s and (?{ ... })'s to be in the way
- * of the quantifier and the EXACT-like node. -- japhy
- */
-
- if (ST.min > ST.max) /* XXX make this a compile-time check? */
- sayNO;
- if (HAS_TEXT(next) || JUMPABLE(next)) {
- U8 *s;
- regnode *text_node = next;
-
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
-
- if (! HAS_TEXT(text_node))
- ST.c1 = ST.c2 = CHRTEST_VOID;
- else {
- if ( PL_regkind[OP(text_node)] != EXACT ) {
- ST.c1 = ST.c2 = CHRTEST_VOID;
- goto assume_ok_easy;
- }
- else
- s = (U8*)STRING(text_node);
-
- /* Currently we only get here when
-
- PL_rekind[OP(text_node)] == EXACT
-
- if this changes back then the macro for IS_TEXT and
- friends need to change. */
- if (!UTF) {
- ST.c2 = ST.c1 = *s;
- if (IS_TEXTF(text_node))
- ST.c2 = PL_fold[ST.c1];
- else if (IS_TEXTFL(text_node))
- ST.c2 = PL_fold_locale[ST.c1];
- }
- else { /* UTF */
- if (IS_TEXTF(text_node)) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- to_utf8_lower((U8*)s, tmpbuf1, &ulen1);
- to_utf8_upper((U8*)s, tmpbuf2, &ulen2);
-#ifdef EBCDIC
- ST.c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
- ST.c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
-#else
- ST.c1 = utf8n_to_uvuni(tmpbuf1, UTF8_MAXBYTES, 0,
- uniflags);
- ST.c2 = utf8n_to_uvuni(tmpbuf2, UTF8_MAXBYTES, 0,
- uniflags);
-#endif
- }
- else {
- ST.c2 = ST.c1 = utf8n_to_uvchr(s, UTF8_MAXBYTES, 0,
- uniflags);
- }
- }
- }
- }
- else
- ST.c1 = ST.c2 = CHRTEST_VOID;
- assume_ok_easy:
-
- ST.A = scan;
- ST.B = next;
- PL_reginput = locinput;
- if (minmod) {
- minmod = 0;
- if (ST.min && regrepeat(rex, ST.A, ST.min, depth) < ST.min)
- sayNO;
- ST.count = ST.min;
- locinput = PL_reginput;
- REGCP_SET(ST.cp);
- if (ST.c1 == CHRTEST_VOID)
- goto curly_try_B_min;
-
- ST.oldloc = locinput;
-
- /* set ST.maxpos to the furthest point along the
- * string that could possibly match */
- if (ST.max == REG_INFTY) {
- ST.maxpos = PL_regeol - 1;
- if (do_utf8)
- while (UTF8_IS_CONTINUATION(*(U8*)ST.maxpos))
- ST.maxpos--;
- }
- else if (do_utf8) {
- int m = ST.max - ST.min;
- for (ST.maxpos = locinput;
- m >0 && ST.maxpos + UTF8SKIP(ST.maxpos) <= PL_regeol; m--)
- ST.maxpos += UTF8SKIP(ST.maxpos);
- }
- else {
- ST.maxpos = locinput + ST.max - ST.min;
- if (ST.maxpos >= PL_regeol)
- ST.maxpos = PL_regeol - 1;
- }
- goto curly_try_B_min_known;
-
- }
- else {
- ST.count = regrepeat(rex, ST.A, ST.max, depth);
- locinput = PL_reginput;
- if (ST.count < ST.min)
- sayNO;
- if ((ST.count > ST.min)
- && (PL_regkind[OP(ST.B)] == EOL) && (OP(ST.B) != MEOL))
- {
- /* A{m,n} must come at the end of the string, there's
- * no point in backing off ... */
- ST.min = ST.count;
- /* ...except that $ and \Z can match before *and* after
- newline at the end. Consider "\n\n" =~ /\n+\Z\n/.
- We may back off by one in this case. */
- if (UCHARAT(PL_reginput - 1) == '\n' && OP(ST.B) != EOS)
- ST.min--;
- }
- REGCP_SET(ST.cp);
- goto curly_try_B_max;
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_known_fail:
- /* failed to find B in a non-greedy match where c1,c2 valid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- PL_reginput = locinput; /* Could be reset... */
- REGCP_UNWIND(ST.cp);
- /* Couldn't or didn't -- move forward. */
- ST.oldloc = locinput;
- if (do_utf8)
- locinput += UTF8SKIP(locinput);
- else
- locinput++;
- ST.count++;
- curly_try_B_min_known:
- /* find the next place where 'B' could work, then call B */
- {
- int n;
- if (do_utf8) {
- n = (ST.oldloc == locinput) ? 0 : 1;
- if (ST.c1 == ST.c2) {
- STRLEN len;
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos &&
- utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags) != (UV)ST.c1) {
- locinput += len;
- n++;
- }
- }
- else {
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos) {
- STRLEN len;
- const UV c = utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags);
- if (c == (UV)ST.c1 || c == (UV)ST.c2)
- break;
- locinput += len;
- n++;
- }
- }
- }
- else {
- if (ST.c1 == ST.c2) {
- while (locinput <= ST.maxpos &&
- UCHARAT(locinput) != ST.c1)
- locinput++;
- }
- else {
- while (locinput <= ST.maxpos
- && UCHARAT(locinput) != ST.c1
- && UCHARAT(locinput) != ST.c2)
- locinput++;
- }
- n = locinput - ST.oldloc;
- }
- if (locinput > ST.maxpos)
- sayNO;
- /* PL_reginput == oldloc now */
- if (n) {
- ST.count += n;
- if (regrepeat(rex, ST.A, n, depth) < n)
- sayNO;
- }
- PL_reginput = locinput;
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min_known, ST.B);
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_fail:
- /* failed to find B in a non-greedy match where c1,c2 invalid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* failed -- move forward one */
- PL_reginput = locinput;
- if (regrepeat(rex, ST.A, 1, depth)) {
- ST.count++;
- locinput = PL_reginput;
- if (ST.count <= ST.max || (ST.max == REG_INFTY &&
- ST.count > 0)) /* count overflow ? */
- {
- curly_try_B_min:
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min, ST.B);
- }
- }
- sayNO;
- /* NOTREACHED */
-
-
- curly_try_B_max:
- /* a successful greedy match: now try to match B */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- {
- UV c = 0;
- if (ST.c1 != CHRTEST_VOID)
- c = do_utf8 ? utf8n_to_uvchr((U8*)PL_reginput,
- UTF8_MAXBYTES, 0, uniflags)
- : (UV) UCHARAT(PL_reginput);
- /* If it could work, try it. */
- if (ST.c1 == CHRTEST_VOID || c == (UV)ST.c1 || c == (UV)ST.c2) {
- CURLY_SETPAREN(ST.paren, ST.count);
- PUSH_STATE_GOTO(CURLY_B_max, ST.B);
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case CURLY_B_max_fail:
- /* failed to find B in a greedy match */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* back up. */
- if (--ST.count < ST.min)
- sayNO;
- PL_reginput = locinput = HOPc(locinput, -1);
- goto curly_try_B_max;
-
-#undef ST
-
- case END:
- fake_end:
- if (cur_eval) {
- /* we've just finished A in /(??{A})B/; now continue with B */
- I32 tmpix;
- st->u.eval.toggle_reg_flags
- = cur_eval->u.eval.toggle_reg_flags;
- PL_reg_flags ^= st->u.eval.toggle_reg_flags;
-
- st->u.eval.prev_rex = rex_sv; /* inner */
- SETREX(rex_sv,cur_eval->u.eval.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- cur_curlyx = cur_eval->u.eval.prev_curlyx;
- ReREFCNT_inc(rex_sv);
- st->u.eval.cp = regcppush(0); /* Save *all* the positions. */
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- REGCP_SET(st->u.eval.lastcp);
- PL_reginput = locinput;
-
- /* Restore parens of the outer rex without popping the
- * savestack */
- tmpix = PL_savestack_ix;
- PL_savestack_ix = cur_eval->u.eval.lastcp;
- regcppop(rex);
- PL_savestack_ix = tmpix;
-
- st->u.eval.prev_eval = cur_eval;
- cur_eval = cur_eval->u.eval.prev_eval;
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log, "%*s EVAL trying tail ... %"UVxf"\n",
- REPORT_CODE_OFF+depth*2, "",PTR2UV(cur_eval)););
- if ( nochange_depth )
- nochange_depth--;
-
- PUSH_YES_STATE_GOTO(EVAL_AB,
- st->u.eval.prev_eval->u.eval.B); /* match B */
- }
-
- if (locinput < reginfo->till) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n",
- PL_colors[4],
- (long)(locinput - PL_reg_starttry),
- (long)(reginfo->till - PL_reg_starttry),
- PL_colors[5]));
-
- sayNO_SILENT; /* Cannot match: too short. */
- }
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
- case SUCCEED: /* successful SUSPEND/UNLESSM/IFMATCH/CURLYM */
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %ssubpattern success...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]));
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
-#undef ST
-#define ST st->u.ifmatch
-
- case SUSPEND: /* (?>A) */
- ST.wanted = 1;
- PL_reginput = locinput;
- goto do_ifmatch;
-
- case UNLESSM: /* -ve lookaround: (?!A), or with flags, (?<!A) */
- ST.wanted = 0;
- goto ifmatch_trivial_fail_test;
-
- case IFMATCH: /* +ve lookaround: (?=A), or with flags, (?<=A) */
- ST.wanted = 1;
- ifmatch_trivial_fail_test:
- if (scan->flags) {
- char * const s = HOPBACKc(locinput, scan->flags);
- if (!s) {
- /* trivial fail */
- if (logical) {
- logical = 0;
- sw = 1 - (bool)ST.wanted;
- }
- else if (ST.wanted)
- sayNO;
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- }
- PL_reginput = s;
- }
- else
- PL_reginput = locinput;
-
- do_ifmatch:
- ST.me = scan;
- ST.logical = logical;
- logical = 0; /* XXX: reset state of logical once it has been saved into ST */
-
- /* execute body of (?...A) */
- PUSH_YES_STATE_GOTO(IFMATCH_A, NEXTOPER(NEXTOPER(scan)));
- /* NOTREACHED */
-
- case IFMATCH_A_fail: /* body of (?...A) failed */
- ST.wanted = !ST.wanted;
- /* FALL THROUGH */
-
- case IFMATCH_A: /* body of (?...A) succeeded */
- if (ST.logical) {
- sw = (bool)ST.wanted;
- }
- else if (!ST.wanted)
- sayNO;
-
- if (OP(ST.me) == SUSPEND)
- locinput = PL_reginput;
- else {
- locinput = PL_reginput = st->locinput;
- nextchr = UCHARAT(locinput);
- }
- scan = ST.me + ARG(ST.me);
- if (scan == ST.me)
- scan = NULL;
- continue; /* execute B */
-
-#undef ST
-
- case LONGJMP:
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- case COMMIT:
- reginfo->cutpoint = PL_regeol;
- /* FALLTHROUGH */
- case PRUNE:
- PL_reginput = locinput;
- if (!scan->flags)
- sv_yes_mark = sv_commit = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(COMMIT_next,next);
- /* NOTREACHED */
- case COMMIT_next_fail:
- no_final = 1;
- /* FALLTHROUGH */
- case OPFAIL:
- sayNO;
- /* NOTREACHED */
-
-#define ST st->u.mark
- case MARKPOINT:
- ST.prev_mark = mark_state;
- ST.mark_name = sv_commit = sv_yes_mark
- = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- mark_state = st;
- ST.mark_loc = PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(MARKPOINT_next,next);
- /* NOTREACHED */
- case MARKPOINT_next:
- mark_state = ST.prev_mark;
- sayYES;
- /* NOTREACHED */
- case MARKPOINT_next_fail:
- if (popmark && sv_eq(ST.mark_name,popmark))
- {
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- popmark = NULL; /* we found our mark */
- sv_commit = ST.mark_name;
-
- DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,
- "%*s %ssetting cutpoint to mark:%"SVf"...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], SVfARG(sv_commit), PL_colors[5]);
- });
- }
- mark_state = ST.prev_mark;
- sv_yes_mark = mark_state ?
- mark_state->u.mark.mark_name : NULL;
- sayNO;
- /* NOTREACHED */
- case SKIP:
- PL_reginput = locinput;
- if (scan->flags) {
- /* (*SKIP) : if we fail we cut here*/
- ST.mark_name = NULL;
- ST.mark_loc = locinput;
- PUSH_STATE_GOTO(SKIP_next,next);
- } else {
- /* (*SKIP:NAME) : if there is a (*MARK:NAME) fail where it was,
- otherwise do nothing. Meaning we need to scan
- */
- regmatch_state *cur = mark_state;
- SV *find = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
-
- while (cur) {
- if ( sv_eq( cur->u.mark.mark_name,
- find ) )
- {
- ST.mark_name = find;
- PUSH_STATE_GOTO( SKIP_next, next );
- }
- cur = cur->u.mark.prev_mark;
- }
- }
- /* Didn't find our (*MARK:NAME) so ignore this (*SKIP:NAME) */
- break;
- case SKIP_next_fail:
- if (ST.mark_name) {
- /* (*CUT:NAME) - Set up to search for the name as we
- collapse the stack*/
- popmark = ST.mark_name;
- } else {
- /* (*CUT) - No name, we cut here.*/
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- /* but we set sv_commit to latest mark_name if there
- is one so they can test to see how things lead to this
- cut */
- if (mark_state)
- sv_commit=mark_state->u.mark.mark_name;
- }
- no_final = 1;
- sayNO;
- /* NOTREACHED */
-#undef ST
- case FOLDCHAR:
- n = ARG(scan);
- if ( n == (U32)what_len_TRICKYFOLD(locinput,do_utf8,ln) ) {
- locinput += ln;
- } else if ( 0xDF == n && !do_utf8 && !UTF ) {
- sayNO;
- } else {
- U8 folded[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const char * const l = locinput;
- char *e = PL_regeol;
- to_uni_fold(n, folded, &foldlen);
-
- if (ibcmp_utf8((const char*) folded, 0, foldlen, 1,
- l, &e, 0, do_utf8)) {
- sayNO;
- }
- locinput = e;
- }
- nextchr = UCHARAT(locinput);
- break;
- case LNBREAK:
- if ((n=is_LNBREAK(locinput,do_utf8))) {
- locinput += n;
- nextchr = UCHARAT(locinput);
- } else
- sayNO;
- break;
-
-#define CASE_CLASS(nAmE) \
- case nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- locinput += n; \
- nextchr = UCHARAT(locinput); \
- } else \
- sayNO; \
- break; \
- case N##nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- sayNO; \
- } else { \
- locinput += UTF8SKIP(locinput); \
- nextchr = UCHARAT(locinput); \
- } \
- break
-
- CASE_CLASS(VERTWS);
- CASE_CLASS(HORIZWS);
-#undef CASE_CLASS
-
- default:
- PerlIO_printf(Perl_error_log, "%"UVxf" %d\n",
- PTR2UV(scan), OP(scan));
- Perl_croak(aTHX_ "regexp memory corruption");
-
- } /* end switch */
-
- /* switch break jumps here */
- scan = next; /* prepare to execute the next op and ... */
- continue; /* ... jump back to the top, reusing st */
- /* NOTREACHED */
-
- push_yes_state:
- /* push a state that backtracks on success */
- st->u.yes.prev_yes_state = yes_state;
- yes_state = st;
- /* FALL THROUGH */
- push_state:
- /* push a new regex state, then continue at scan */
- {
- regmatch_state *newst;
-
- DEBUG_STACK_r({
- regmatch_state *cur = st;
- regmatch_state *curyes = yes_state;
- int curd = depth;
- regmatch_slab *slab = PL_regmatch_slab;
- for (;curd > -1;cur--,curd--) {
- if (cur < SLAB_FIRST(slab)) {
- slab = slab->prev;
- cur = SLAB_LAST(slab);
- }
- PerlIO_printf(Perl_error_log, "%*s#%-3d %-10s %s\n",
- REPORT_CODE_OFF + 2 + depth * 2,"",
- curd, PL_reg_name[cur->resume_state],
- (curyes == cur) ? "yes" : ""
- );
- if (curyes == cur)
- curyes = cur->u.yes.prev_yes_state;
- }
- } else
- DEBUG_STATE_pp("push")
- );
- depth++;
- st->locinput = locinput;
- newst = st+1;
- if (newst > SLAB_LAST(PL_regmatch_slab))
- newst = S_push_slab(aTHX);
- PL_regmatch_state = newst;
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- st = newst;
- continue;
- /* NOTREACHED */
- }
- }
-
- /*
- * We get here only if there's trouble -- normally "case END" is
- * the terminating point.
- */
- Perl_croak(aTHX_ "corrupted regexp pointers");
- /*NOTREACHED*/
- sayNO;
-
-yes:
- if (yes_state) {
- /* we have successfully completed a subexpression, but we must now
- * pop to the state marked by yes_state and continue from there */
- assert(st != yes_state);
-#ifdef DEBUGGING
- while (st != yes_state) {
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- DEBUG_STATE_r({
- if (no_final) {
- DEBUG_STATE_pp("pop (no final)");
- } else {
- DEBUG_STATE_pp("pop (yes)");
- }
- });
- depth--;
- }
-#else
- while (yes_state < SLAB_FIRST(PL_regmatch_slab)
- || yes_state > SLAB_LAST(PL_regmatch_slab))
- {
- /* not in this slab, pop slab */
- depth -= (st - SLAB_FIRST(PL_regmatch_slab) + 1);
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- depth -= (st - yes_state);
-#endif
- st = yes_state;
- yes_state = st->u.yes.prev_yes_state;
- PL_regmatch_state = st;
-
- if (no_final) {
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
- }
- state_num = st->resume_state + no_final;
- goto reenter_switch;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n",
- PL_colors[4], PL_colors[5]));
-
- if (PL_reg_eval_set) {
- /* each successfully executed (?{...}) block does the equivalent of
- * local $^R = do {...}
- * When popping the save stack, all these locals would be undone;
- * bypass this by setting the outermost saved $^R to the latest
- * value */
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- }
- result = 1;
- goto final_exit;
-
-no:
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], PL_colors[5])
- );
-
-no_silent:
- if (no_final) {
- if (yes_state) {
- goto yes;
- } else {
- goto final_exit;
- }
- }
- if (depth) {
- /* there's a previous state to backtrack to */
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- PL_regmatch_state = st;
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
-
- DEBUG_STATE_pp("pop");
- depth--;
- if (yes_state == st)
- yes_state = st->u.yes.prev_yes_state;
-
- state_num = st->resume_state + 1; /* failure = success + 1 */
- goto reenter_switch;
- }
- result = 0;
-
- final_exit:
- if (rex->intflags & PREGf_VERBARG_SEEN) {
- SV *sv_err = get_sv("REGERROR", 1);
- SV *sv_mrk = get_sv("REGMARK", 1);
- if (result) {
- sv_commit = &PL_sv_no;
- if (!sv_yes_mark)
- sv_yes_mark = &PL_sv_yes;
- } else {
- if (!sv_commit)
- sv_commit = &PL_sv_yes;
- sv_yes_mark = &PL_sv_no;
- }
- sv_setsv(sv_err, sv_commit);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- /* clean up; in particular, free all slabs above current one */
- LEAVE_SCOPE(oldsave);
-
- return result;
-}
-
-/*
- - regrepeat - repeatedly match something simple, report how many
- */
-/*
- * [This routine now assumes that it will only match on things of length 1.
- * That was true before, but now we assume scan - reginput is the count,
- * rather than incrementing count on every character. [Er, except utf8.]]
- */
-STATIC I32
-S_regrepeat(pTHX_ const regexp *prog, const regnode *p, I32 max, int depth)
-{
- dVAR;
- register char *scan;
- register I32 c;
- register char *loceol = PL_regeol;
- register I32 hardcount = 0;
- register bool do_utf8 = PL_reg_match_utf8;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_REGREPEAT;
-
- scan = PL_reginput;
- if (max == REG_INFTY)
- max = I32_MAX;
- else if (max < loceol - scan)
- loceol = scan + max;
- switch (OP(p)) {
- case REG_ANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max && *scan != '\n') {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && *scan != '\n')
- scan++;
- }
- break;
- case SANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- }
- else
- scan = loceol;
- break;
- case CANY:
- scan = loceol;
- break;
- case EXACT: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol && UCHARAT(scan) == c)
- scan++;
- break;
- case EXACTF: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c]))
- scan++;
- break;
- case EXACTFL: /* length of string is 1 */
- PL_reg_flags |= RF_tainted;
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c]))
- scan++;
- break;
- case ANYOF:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- reginclass(prog, p, (U8*)scan, 0, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && REGINCLASS(prog, p, (U8*)scan))
- scan++;
- }
- break;
- case ALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM(*scan))
- scan++;
- }
- break;
- case ALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM_LC(*scan))
- scan++;
- }
- break;
- case NALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM(*scan))
- scan++;
- }
- break;
- case NALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM_LC(*scan))
- scan++;
- }
- break;
- case SPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE(*scan))
- scan++;
- }
- break;
- case SPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE_LC(*scan))
- scan++;
- }
- break;
- case NSPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE(*scan))
- scan++;
- }
- break;
- case NSPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE_LC(*scan))
- scan++;
- }
- break;
- case DIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isDIGIT(*scan))
- scan++;
- }
- break;
- case NDIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isDIGIT(*scan))
- scan++;
- }
- case LNBREAK:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_LNBREAK_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- /*
- LNBREAK can match two latin chars, which is ok,
- because we have a null terminated string, but we
- have to use hardcount in this situation
- */
- while (scan < loceol && (c=is_LNBREAK_latin1(scan))) {
- scan+=c;
- hardcount++;
- }
- }
- break;
- case HORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_HORIZWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_HORIZWS_latin1(scan))
- scan++;
- }
- break;
- case NHORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_HORIZWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_HORIZWS_latin1(scan))
- scan++;
-
- }
- break;
- case VERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_VERTWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
- case NVERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_VERTWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
-
- default: /* Called on something of 0 width. */
- break; /* So match right here or not at all. */
- }
-
- if (hardcount)
- c = hardcount;
- else
- c = scan - PL_reginput;
- PL_reginput = scan;
-
- DEBUG_r({
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, p);
- PerlIO_printf(Perl_debug_log,
- "%*s %s can match %"IVdf" times out of %"IVdf"...\n",
- REPORT_CODE_OFF + depth*2, "", SvPVX_const(prop),(IV)c,(IV)max);
- });
- });
-
- return(c);
-}
-
-
-#if !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION)
-/*
-- regclass_swash - prepare the utf8 swash
-*/
-
-SV *
-Perl_regclass_swash(pTHX_ const regexp *prog, register const regnode* node, bool doinit, SV** listsvp, SV **altsvp)
-{
- dVAR;
- SV *sw = NULL;
- SV *si = NULL;
- SV *alt = NULL;
- RXi_GET_DECL(prog,progi);
- const struct reg_data * const data = prog ? progi->data : NULL;
-
- PERL_ARGS_ASSERT_REGCLASS_SWASH;
-
- if (data && data->count) {
- const U32 n = ARG(node);
-
- if (data->what[n] == 's') {
- SV * const rv = MUTABLE_SV(data->data[n]);
- AV * const av = MUTABLE_AV(SvRV(rv));
- SV **const ary = AvARRAY(av);
- SV **a, **b;
-
- /* See the end of regcomp.c:S_regclass() for
- * documentation of these array elements. */
-
- si = *ary;
- a = SvROK(ary[1]) ? &ary[1] : NULL;
- b = SvTYPE(ary[2]) == SVt_PVAV ? &ary[2] : NULL;
-
- if (a)
- sw = *a;
- else if (si && doinit) {
- sw = swash_init("utf8", "", si, 1, 0);
- (void)av_store(av, 1, sw);
- }
- if (b)
- alt = *b;
- }
- }
-
- if (listsvp)
- *listsvp = si;
- if (altsvp)
- *altsvp = alt;
-
- return sw;
-}
-#endif
-
-/*
- - reginclass - determine if a character falls into a character class
-
- The n is the ANYOF regnode, the p is the target string, lenp
- is pointer to the maximum length of how far to go in the p
- (if the lenp is zero, UTF8SKIP(p) is used),
- do_utf8 tells whether the target string is in UTF-8.
-
- */
-
-STATIC bool
-S_reginclass(pTHX_ const regexp *prog, register const regnode *n, register const U8* p, STRLEN* lenp, register bool do_utf8)
-{
- dVAR;
- const char flags = ANYOF_FLAGS(n);
- bool match = FALSE;
- UV c = *p;
- STRLEN len = 0;
- STRLEN plen;
-
- PERL_ARGS_ASSERT_REGINCLASS;
-
- if (do_utf8 && !UTF8_IS_INVARIANT(c)) {
- c = utf8n_to_uvchr(p, UTF8_MAXBYTES, &len,
- (UTF8_ALLOW_DEFAULT & UTF8_ALLOW_ANYUV)
- | UTF8_ALLOW_FFFF | UTF8_CHECK_ONLY);
- /* see [perl #37836] for UTF8_ALLOW_ANYUV; [perl #38293] for
- * UTF8_ALLOW_FFFF */
- if (len == (STRLEN)-1)
- Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)");
- }
-
- plen = lenp ? *lenp : UNISKIP(NATIVE_TO_UNI(c));
- if (do_utf8 || (flags & ANYOF_UNICODE)) {
- if (lenp)
- *lenp = 0;
- if (do_utf8 && !ANYOF_RUNTIME(n)) {
- if (len != (STRLEN)-1 && c < 256 && ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- }
- if (!match && do_utf8 && (flags & ANYOF_UNICODE_ALL) && c >= 256)
- match = TRUE;
- if (!match) {
- AV *av;
- SV * const sw = regclass_swash(prog, n, TRUE, 0, (SV**)&av);
-
- if (sw) {
- U8 * utf8_p;
- if (do_utf8) {
- utf8_p = (U8 *) p;
- } else {
- STRLEN len = 1;
- utf8_p = bytes_to_utf8(p, &len);
- }
- if (swash_fetch(sw, utf8_p, 1))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- if (!match && lenp && av) {
- I32 i;
- for (i = 0; i <= av_len(av); i++) {
- SV* const sv = *av_fetch(av, i, FALSE);
- STRLEN len;
- const char * const s = SvPV_const(sv, len);
- if (len <= plen && memEQ(s, (char*)utf8_p, len)) {
- *lenp = len;
- match = TRUE;
- break;
- }
- }
- }
- if (!match) {
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1];
-
- STRLEN tmplen;
- to_utf8_fold(utf8_p, tmpbuf, &tmplen);
- if (swash_fetch(sw, tmpbuf, 1))
- match = TRUE;
- }
- }
-
- /* If we allocated a string above, free it */
- if (! do_utf8) Safefree(utf8_p);
- }
- }
- if (match && lenp && *lenp == 0)
- *lenp = UNISKIP(NATIVE_TO_UNI(c));
- }
- if (!match && c < 256) {
- if (ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- U8 f;
-
- if (flags & ANYOF_LOCALE) {
- PL_reg_flags |= RF_tainted;
- f = PL_fold_locale[c];
- }
- else
- f = PL_fold[c];
- if (f != c && ANYOF_BITMAP_TEST(n, f))
- match = TRUE;
- }
-
- if (!match && (flags & ANYOF_CLASS)) {
- PL_reg_flags |= RF_tainted;
- if (
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK(c))
- ) /* How's that for a conditional? */
- {
- match = TRUE;
- }
- }
- }
-
- return (flags & ANYOF_INVERT) ? !match : match;
-}
-
-STATIC U8 *
-S_reghop3(U8 *s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-
-#ifdef XXX_dmq
-/* there are a bunch of places where we use two reghop3's that should
- be replaced with this routine. but since thats not done yet
- we ifdef it out - dmq
-*/
-STATIC U8 *
-S_reghop4(U8 *s, I32 off, const U8* llim, const U8* rlim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP4;
-
- if (off >= 0) {
- while (off-- && s < rlim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > llim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > llim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-#endif
-
-STATIC U8 *
-S_reghopmaybe3(U8* s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOPMAYBE3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- if (off >= 0)
- return NULL;
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- if (off <= 0)
- return NULL;
- }
- return s;
-}
-
-static void
-restore_pos(pTHX_ void *arg)
-{
- dVAR;
- regexp * const rex = (regexp *)arg;
- if (PL_reg_eval_set) {
- if (PL_reg_oldsaved) {
- rex->subbeg = PL_reg_oldsaved;
- rex->sublen = PL_reg_oldsavedlen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- rex->saved_copy = PL_nrs;
-#endif
- RXp_MATCH_COPIED_on(rex);
- }
- PL_reg_magic->mg_len = PL_reg_oldpos;
- PL_reg_eval_set = 0;
- PL_curpm = PL_reg_oldcurpm;
- }
-}
-
-STATIC void
-S_to_utf8_substr(pTHX_ register regexp *prog)
-{
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_UTF8_SUBSTR;
-
- do {
- if (prog->substrs->data[i].substr
- && !prog->substrs->data[i].utf8_substr) {
- SV* const sv = newSVsv(prog->substrs->data[i].substr);
- prog->substrs->data[i].utf8_substr = sv;
- sv_utf8_upgrade(sv);
- if (SvVALID(prog->substrs->data[i].substr)) {
- const U8 flags = BmFLAGS(prog->substrs->data[i].substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- /* Whilst this makes the SV technically "invalid" (as its
- buffer is no longer followed by "\0") when fbm_compile()
- adds the "\n" back, a "\0" is restored. */
- }
- fbm_compile(sv, flags);
- }
- if (prog->substrs->data[i].substr == prog->check_substr)
- prog->check_utf8 = sv;
- }
- } while (i--);
-}
-
-STATIC void
-S_to_byte_substr(pTHX_ register regexp *prog)
-{
- dVAR;
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_BYTE_SUBSTR;
-
- do {
- if (prog->substrs->data[i].utf8_substr
- && !prog->substrs->data[i].substr) {
- SV* sv = newSVsv(prog->substrs->data[i].utf8_substr);
- if (sv_utf8_downgrade(sv, TRUE)) {
- if (SvVALID(prog->substrs->data[i].utf8_substr)) {
- const U8 flags
- = BmFLAGS(prog->substrs->data[i].utf8_substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- }
- fbm_compile(sv, flags);
- }
- } else {
- SvREFCNT_dec(sv);
- sv = &PL_sv_undef;
- }
- prog->substrs->data[i].substr = sv;
- if (prog->substrs->data[i].utf8_substr == prog->check_utf8)
- prog->check_substr = sv;
- }
- } while (i--);
-}
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regcomp.c
- */
-
-/*
- * 'A fair jaw-cracker dwarf-language must be.' --Samwise Gamgee
- *
- * [p.285 of _The Lord of the Rings_, II/iii: "The Ring Goes South"]
- */
-
-/* This file contains functions for compiling a regular expression. See
- * also regexec.c which funnily enough, contains functions for executing
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_comp.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
-
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGCOMP_C
-#include "perl.h"
-
-#ifndef PERL_IN_XSUB_RE
-# include "INTERN.h"
-#endif
-
-#define REG_COMP_C
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#ifdef op
-#undef op
-#endif /* op */
-
-#ifdef MSDOS
-# if defined(BUGGY_MSC6)
- /* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */
-# pragma optimize("a",off)
- /* But MSC 6.00A is happy with 'w', for aliases only across function calls*/
-# pragma optimize("w",on )
-# endif /* BUGGY_MSC6 */
-#endif /* MSDOS */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-typedef struct RExC_state_t {
- U32 flags; /* are we folding, multilining? */
- char *precomp; /* uncompiled string. */
- REGEXP *rx_sv; /* The SV that is the regexp. */
- regexp *rx; /* perl core regexp structure */
- regexp_internal *rxi; /* internal data for regexp object pprivate field */
- char *start; /* Start of input for compile */
- char *end; /* End of input for compile */
- char *parse; /* Input-scan pointer. */
- I32 whilem_seen; /* number of WHILEM in this expr */
- regnode *emit_start; /* Start of emitted-code area */
- regnode *emit_bound; /* First regnode outside of the allocated space */
- regnode *emit; /* Code-emit pointer; ®dummy = don't = compiling */
- I32 naughty; /* How bad is this pattern? */
- I32 sawback; /* Did we see \1, ...? */
- U32 seen;
- I32 size; /* Code size. */
- I32 npar; /* Capture buffer count, (OPEN). */
- I32 cpar; /* Capture buffer count, (CLOSE). */
- I32 nestroot; /* root parens we are in - used by accept */
- I32 extralen;
- I32 seen_zerolen;
- I32 seen_evals;
- regnode **open_parens; /* pointers to open parens */
- regnode **close_parens; /* pointers to close parens */
- regnode *opend; /* END node in program */
- I32 utf8; /* whether the pattern is utf8 or not */
- I32 orig_utf8; /* whether the pattern was originally in utf8 */
- /* XXX use this for future optimisation of case
- * where pattern must be upgraded to utf8. */
- HV *paren_names; /* Paren names */
-
- regnode **recurse; /* Recurse regops */
- I32 recurse_count; /* Number of recurse regops */
-#if ADD_TO_REGEXEC
- char *starttry; /* -Dr: where regtry was called. */
-#define RExC_starttry (pRExC_state->starttry)
-#endif
-#ifdef DEBUGGING
- const char *lastparse;
- I32 lastnum;
- AV *paren_name_list; /* idx -> name */
-#define RExC_lastparse (pRExC_state->lastparse)
-#define RExC_lastnum (pRExC_state->lastnum)
-#define RExC_paren_name_list (pRExC_state->paren_name_list)
-#endif
-} RExC_state_t;
-
-#define RExC_flags (pRExC_state->flags)
-#define RExC_precomp (pRExC_state->precomp)
-#define RExC_rx_sv (pRExC_state->rx_sv)
-#define RExC_rx (pRExC_state->rx)
-#define RExC_rxi (pRExC_state->rxi)
-#define RExC_start (pRExC_state->start)
-#define RExC_end (pRExC_state->end)
-#define RExC_parse (pRExC_state->parse)
-#define RExC_whilem_seen (pRExC_state->whilem_seen)
-#ifdef RE_TRACK_PATTERN_OFFSETS
-#define RExC_offsets (pRExC_state->rxi->u.offsets) /* I am not like the others */
-#endif
-#define RExC_emit (pRExC_state->emit)
-#define RExC_emit_start (pRExC_state->emit_start)
-#define RExC_emit_bound (pRExC_state->emit_bound)
-#define RExC_naughty (pRExC_state->naughty)
-#define RExC_sawback (pRExC_state->sawback)
-#define RExC_seen (pRExC_state->seen)
-#define RExC_size (pRExC_state->size)
-#define RExC_npar (pRExC_state->npar)
-#define RExC_nestroot (pRExC_state->nestroot)
-#define RExC_extralen (pRExC_state->extralen)
-#define RExC_seen_zerolen (pRExC_state->seen_zerolen)
-#define RExC_seen_evals (pRExC_state->seen_evals)
-#define RExC_utf8 (pRExC_state->utf8)
-#define RExC_orig_utf8 (pRExC_state->orig_utf8)
-#define RExC_open_parens (pRExC_state->open_parens)
-#define RExC_close_parens (pRExC_state->close_parens)
-#define RExC_opend (pRExC_state->opend)
-#define RExC_paren_names (pRExC_state->paren_names)
-#define RExC_recurse (pRExC_state->recurse)
-#define RExC_recurse_count (pRExC_state->recurse_count)
-
-
-#define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?')
-#define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \
- ((*s) == '{' && regcurly(s)))
-
-#ifdef SPSTART
-#undef SPSTART /* dratted cpp namespace... */
-#endif
-/*
- * Flags to be passed up and down.
- */
-#define WORST 0 /* Worst case. */
-#define HASWIDTH 0x01 /* Known to match non-null strings. */
-#define SIMPLE 0x02 /* Simple enough to be STAR/PLUS operand. */
-#define SPSTART 0x04 /* Starts with * or +. */
-#define TRYAGAIN 0x08 /* Weeded out a declaration. */
-#define POSTPONED 0x10 /* (?1),(?&name), (??{...}) or similar */
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-RExC_emit_start) : -1)
-
-/* whether trie related optimizations are enabled */
-#if PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION
-#define TRIE_STUDY_OPT
-#define FULL_TRIE_STUDY
-#define TRIE_STCLASS
-#endif
-
-
-
-#define PBYTE(u8str,paren) ((U8*)(u8str))[(paren) >> 3]
-#define PBITVAL(paren) (1 << ((paren) & 7))
-#define PAREN_TEST(u8str,paren) ( PBYTE(u8str,paren) & PBITVAL(paren))
-#define PAREN_SET(u8str,paren) PBYTE(u8str,paren) |= PBITVAL(paren)
-#define PAREN_UNSET(u8str,paren) PBYTE(u8str,paren) &= (~PBITVAL(paren))
-
-
-/* About scan_data_t.
-
- During optimisation we recurse through the regexp program performing
- various inplace (keyhole style) optimisations. In addition study_chunk
- and scan_commit populate this data structure with information about
- what strings MUST appear in the pattern. We look for the longest
- string that must appear for at a fixed location, and we look for the
- longest string that may appear at a floating location. So for instance
- in the pattern:
-
- /FOO[xX]A.*B[xX]BAR/
-
- Both 'FOO' and 'A' are fixed strings. Both 'B' and 'BAR' are floating
- strings (because they follow a .* construct). study_chunk will identify
- both FOO and BAR as being the longest fixed and floating strings respectively.
-
- The strings can be composites, for instance
-
- /(f)(o)(o)/
-
- will result in a composite fixed substring 'foo'.
-
- For each string some basic information is maintained:
-
- - offset or min_offset
- This is the position the string must appear at, or not before.
- It also implicitly (when combined with minlenp) tells us how many
- character must match before the string we are searching.
- Likewise when combined with minlenp and the length of the string
- tells us how many characters must appear after the string we have
- found.
-
- - max_offset
- Only used for floating strings. This is the rightmost point that
- the string can appear at. Ifset to I32 max it indicates that the
- string can occur infinitely far to the right.
-
- - minlenp
- A pointer to the minimum length of the pattern that the string
- was found inside. This is important as in the case of positive
- lookahead or positive lookbehind we can have multiple patterns
- involved. Consider
-
- /(?=FOO).*F/
-
- The minimum length of the pattern overall is 3, the minimum length
- of the lookahead part is 3, but the minimum length of the part that
- will actually match is 1. So 'FOO's minimum length is 3, but the
- minimum length for the F is 1. This is important as the minimum length
- is used to determine offsets in front of and behind the string being
- looked for. Since strings can be composites this is the length of the
- pattern at the time it was commited with a scan_commit. Note that
- the length is calculated by study_chunk, so that the minimum lengths
- are not known until the full pattern has been compiled, thus the
- pointer to the value.
-
- - lookbehind
-
- In the case of lookbehind the string being searched for can be
- offset past the start point of the final matching string.
- If this value was just blithely removed from the min_offset it would
- invalidate some of the calculations for how many chars must match
- before or after (as they are derived from min_offset and minlen and
- the length of the string being searched for).
- When the final pattern is compiled and the data is moved from the
- scan_data_t structure into the regexp structure the information
- about lookbehind is factored in, with the information that would
- have been lost precalculated in the end_shift field for the
- associated string.
-
- The fields pos_min and pos_delta are used to store the minimum offset
- and the delta to the maximum offset at the current point in the pattern.
-
-*/
-
-typedef struct scan_data_t {
- /*I32 len_min; unused */
- /*I32 len_delta; unused */
- I32 pos_min;
- I32 pos_delta;
- SV *last_found;
- I32 last_end; /* min value, <0 unless valid. */
- I32 last_start_min;
- I32 last_start_max;
- SV **longest; /* Either &l_fixed, or &l_float. */
- SV *longest_fixed; /* longest fixed string found in pattern */
- I32 offset_fixed; /* offset where it starts */
- I32 *minlen_fixed; /* pointer to the minlen relevent to the string */
- I32 lookbehind_fixed; /* is the position of the string modfied by LB */
- SV *longest_float; /* longest floating string found in pattern */
- I32 offset_float_min; /* earliest point in string it can appear */
- I32 offset_float_max; /* latest point in string it can appear */
- I32 *minlen_float; /* pointer to the minlen relevent to the string */
- I32 lookbehind_float; /* is the position of the string modified by LB */
- I32 flags;
- I32 whilem_c;
- I32 *last_closep;
- struct regnode_charclass_class *start_class;
-} scan_data_t;
-
-/*
- * Forward declarations for pregcomp()'s friends.
- */
-
-static const scan_data_t zero_scan_data =
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0};
-
-#define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL)
-#define SF_BEFORE_SEOL 0x0001
-#define SF_BEFORE_MEOL 0x0002
-#define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL)
-#define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL)
-
-#ifdef NO_UNARY_PLUS
-# define SF_FIX_SHIFT_EOL (0+2)
-# define SF_FL_SHIFT_EOL (0+4)
-#else
-# define SF_FIX_SHIFT_EOL (+2)
-# define SF_FL_SHIFT_EOL (+4)
-#endif
-
-#define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL)
-#define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL)
-
-#define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL)
-#define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */
-#define SF_IS_INF 0x0040
-#define SF_HAS_PAR 0x0080
-#define SF_IN_PAR 0x0100
-#define SF_HAS_EVAL 0x0200
-#define SCF_DO_SUBSTR 0x0400
-#define SCF_DO_STCLASS_AND 0x0800
-#define SCF_DO_STCLASS_OR 0x1000
-#define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR)
-#define SCF_WHILEM_VISITED_POS 0x2000
-
-#define SCF_TRIE_RESTUDY 0x4000 /* Do restudy? */
-#define SCF_SEEN_ACCEPT 0x8000
-
-#define UTF (RExC_utf8 != 0)
-#define LOC ((RExC_flags & RXf_PMf_LOCALE) != 0)
-#define FOLD ((RExC_flags & RXf_PMf_FOLD) != 0)
-
-#define OOB_UNICODE 12345678
-#define OOB_NAMEDCLASS -1
-
-#define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b)
-
-
-/* length of regex to show in messages that don't mark a position within */
-#define RegexLengthToShowInErrorMessages 127
-
-/*
- * If MARKER[12] are adjusted, be sure to adjust the constants at the top
- * of t/op/regmesg.t, the tests in t/op/re_tests, and those in
- * op/pragma/warn/regcomp.
- */
-#define MARKER1 "<-- HERE" /* marker as it appears in the description */
-#define MARKER2 " <-- HERE " /* marker as it appears within the regex */
-
-#define REPORT_LOCATION " in regex; marked by " MARKER1 " in m/%.*s" MARKER2 "%s/"
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given
- * arg. Show regex, up to a maximum length. If it's too long, chop and add
- * "...".
- */
-#define _FAIL(code) STMT_START { \
- const char *ellipses = ""; \
- IV len = RExC_end - RExC_precomp; \
- \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- if (len > RegexLengthToShowInErrorMessages) { \
- /* chop 10 shorter than the max, to ensure meaning of "..." */ \
- len = RegexLengthToShowInErrorMessages - 10; \
- ellipses = "..."; \
- } \
- code; \
-} STMT_END
-
-#define FAIL(msg) _FAIL( \
- Perl_croak(aTHX_ "%s in regex m/%.*s%s/", \
- msg, (int)len, RExC_precomp, ellipses))
-
-#define FAIL2(msg,arg) _FAIL( \
- Perl_croak(aTHX_ msg " in regex m/%.*s%s/", \
- arg, (int)len, RExC_precomp, ellipses))
-
-/*
- * Simple_vFAIL -- like FAIL, but marks the current location in the scan
- */
-#define Simple_vFAIL(m) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- Perl_croak(aTHX_ "%s" REPORT_LOCATION, \
- m, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL()
- */
-#define vFAIL(m) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL(m); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts two arguments.
- */
-#define Simple_vFAIL2(m,a1) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2().
- */
-#define vFAIL2(m,a1) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL2(m, a1); \
-} STMT_END
-
-
-/*
- * Like Simple_vFAIL(), but accepts three arguments.
- */
-#define Simple_vFAIL3(m, a1, a2) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3().
- */
-#define vFAIL3(m,a1,a2) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL3(m, a1, a2); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts four arguments.
- */
-#define Simple_vFAIL4(m, a1, a2, a3) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNreg(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNregdep(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_REGEXP), \
- m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN2reg(loc, m, a1) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN3(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN3reg(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN4(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN4reg(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN5(loc, m, a1, a2, a3, a4) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, a4, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-
-/* Allow for side effects in s */
-#define REGC(c,s) STMT_START { \
- if (!SIZE_ONLY) *(s) = (c); else (void)(s); \
-} STMT_END
-
-/* Macros for recording node offsets. 20001227 mjd@plover.com
- * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in
- * element 2*n-1 of the array. Element #2n holds the byte length node #n.
- * Element 0 holds the number n.
- * Position is 1 indexed.
- */
-#ifndef RE_TRACK_PATTERN_OFFSETS
-#define Set_Node_Offset_To_R(node,byte)
-#define Set_Node_Offset(node,byte)
-#define Set_Cur_Node_Offset
-#define Set_Node_Length_To_R(node,len)
-#define Set_Node_Length(node,len)
-#define Set_Node_Cur_Length(node)
-#define Node_Offset(n)
-#define Node_Length(n)
-#define Set_Node_Offset_Length(node,offset,len)
-#define ProgLen(ri) ri->u.proglen
-#define SetProgLen(ri,x) ri->u.proglen = x
-#else
-#define ProgLen(ri) ri->u.offsets[0]
-#define SetProgLen(ri,x) ri->u.offsets[0] = x
-#define Set_Node_Offset_To_R(node,byte) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) offset of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(byte))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Offset macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)-1] = (byte); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Offset(node,byte) \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start)
-#define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse)
-
-#define Set_Node_Length_To_R(node,len) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) size of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(len))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Length macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)] = (len); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Length(node,len) \
- Set_Node_Length_To_R((node)-RExC_emit_start, len)
-#define Set_Cur_Node_Length(len) Set_Node_Length(RExC_emit, len)
-#define Set_Node_Cur_Length(node) \
- Set_Node_Length(node, RExC_parse - parse_start)
-
-/* Get offsets and lengths */
-#define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1])
-#define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)])
-
-#define Set_Node_Offset_Length(node,offset,len) STMT_START { \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (offset)); \
- Set_Node_Length_To_R((node)-RExC_emit_start, (len)); \
-} STMT_END
-#endif
-
-#if PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS
-#define EXPERIMENTAL_INPLACESCAN
-#endif /*RE_TRACK_PATTERN_OFFSETS*/
-
-#define DEBUG_STUDYDATA(str,data,depth) \
-DEBUG_OPTIMISE_MORE_r(if(data){ \
- PerlIO_printf(Perl_debug_log, \
- "%*s" str "Pos:%"IVdf"/%"IVdf \
- " Flags: 0x%"UVXf" Whilem_c: %"IVdf" Lcp: %"IVdf" %s", \
- (int)(depth)*2, "", \
- (IV)((data)->pos_min), \
- (IV)((data)->pos_delta), \
- (UV)((data)->flags), \
- (IV)((data)->whilem_c), \
- (IV)((data)->last_closep ? *((data)->last_closep) : -1), \
- is_inf ? "INF " : "" \
- ); \
- if ((data)->last_found) \
- PerlIO_printf(Perl_debug_log, \
- "Last:'%s' %"IVdf":%"IVdf"/%"IVdf" %sFixed:'%s' @ %"IVdf \
- " %sFloat: '%s' @ %"IVdf"/%"IVdf"", \
- SvPVX_const((data)->last_found), \
- (IV)((data)->last_end), \
- (IV)((data)->last_start_min), \
- (IV)((data)->last_start_max), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_fixed)) ? "*" : "", \
- SvPVX_const((data)->longest_fixed), \
- (IV)((data)->offset_fixed), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_float)) ? "*" : "", \
- SvPVX_const((data)->longest_float), \
- (IV)((data)->offset_float_min), \
- (IV)((data)->offset_float_max) \
- ); \
- PerlIO_printf(Perl_debug_log,"\n"); \
-});
-
-static void clear_re(pTHX_ void *r);
-
-/* Mark that we cannot extend a found fixed substring at this point.
- Update the longest found anchored substring and the longest found
- floating substrings if needed. */
-
-STATIC void
-S_scan_commit(pTHX_ const RExC_state_t *pRExC_state, scan_data_t *data, I32 *minlenp, int is_inf)
-{
- const STRLEN l = CHR_SVLEN(data->last_found);
- const STRLEN old_l = CHR_SVLEN(*data->longest);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_SCAN_COMMIT;
-
- if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) {
- SvSetMagicSV(*data->longest, data->last_found);
- if (*data->longest == data->longest_fixed) {
- data->offset_fixed = l ? data->last_start_min : data->pos_min;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL);
- else
- data->flags &= ~SF_FIX_BEFORE_EOL;
- data->minlen_fixed=minlenp;
- data->lookbehind_fixed=0;
- }
- else { /* *data->longest == data->longest_float */
- data->offset_float_min = l ? data->last_start_min : data->pos_min;
- data->offset_float_max = (l
- ? data->last_start_max
- : data->pos_min + data->pos_delta);
- if (is_inf || (U32)data->offset_float_max > (U32)I32_MAX)
- data->offset_float_max = I32_MAX;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL);
- else
- data->flags &= ~SF_FL_BEFORE_EOL;
- data->minlen_float=minlenp;
- data->lookbehind_float=0;
- }
- }
- SvCUR_set(data->last_found, 0);
- {
- SV * const sv = data->last_found;
- if (SvUTF8(sv) && SvMAGICAL(sv)) {
- MAGIC * const mg = mg_find(sv, PERL_MAGIC_utf8);
- if (mg)
- mg->mg_len = 0;
- }
- }
- data->last_end = -1;
- data->flags &= ~SF_BEFORE_EOL;
- DEBUG_STUDYDATA("commit: ",data,0);
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_anything(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_ANYTHING;
-
- ANYOF_CLASS_ZERO(cl);
- ANYOF_BITMAP_SETALL(cl);
- cl->flags = ANYOF_EOS|ANYOF_UNICODE_ALL;
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* Can match anything (initialization) */
-STATIC int
-S_cl_is_anything(const struct regnode_charclass_class *cl)
-{
- int value;
-
- PERL_ARGS_ASSERT_CL_IS_ANYTHING;
-
- for (value = 0; value <= ANYOF_MAX; value += 2)
- if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1))
- return 1;
- if (!(cl->flags & ANYOF_UNICODE_ALL))
- return 0;
- if (!ANYOF_BITMAP_TESTALLSET((const void*)cl))
- return 0;
- return 1;
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_init(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
-}
-
-STATIC void
-S_cl_init_zero(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT_ZERO;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* 'And' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_and(struct regnode_charclass_class *cl,
- const struct regnode_charclass_class *and_with)
-{
- PERL_ARGS_ASSERT_CL_AND;
-
- assert(and_with->type == ANYOF);
- if (!(and_with->flags & ANYOF_CLASS)
- && !(cl->flags & ANYOF_CLASS)
- && (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(and_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD)) {
- int i;
-
- if (and_with->flags & ANYOF_INVERT)
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= ~and_with->bitmap[i];
- else
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= and_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise, leave it along for a moment. */
- if (!(and_with->flags & ANYOF_EOS))
- cl->flags &= ~ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE_ALL && and_with->flags & ANYOF_UNICODE &&
- !(and_with->flags & ANYOF_INVERT)) {
- cl->flags &= ~ANYOF_UNICODE_ALL;
- cl->flags |= ANYOF_UNICODE;
- ARG_SET(cl, ARG(and_with));
- }
- if (!(and_with->flags & ANYOF_UNICODE_ALL) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE_ALL;
- if (!(and_with->flags & (ANYOF_UNICODE|ANYOF_UNICODE_ALL)) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE;
-}
-
-/* 'OR' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_or(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl, const struct regnode_charclass_class *or_with)
-{
- PERL_ARGS_ASSERT_CL_OR;
-
- if (or_with->flags & ANYOF_INVERT) {
- /* We do not use
- * (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2))
- * <= (B1 | !B2) | (CL1 | !CL2)
- * which is wasteful if CL2 is small, but we ignore CL2:
- * (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1
- * XXXX Can we handle case-fold? Unclear:
- * (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) =
- * (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i'))
- */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(or_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD) ) {
- int i;
-
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= ~or_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise */
- else {
- cl_anything(pRExC_state, cl);
- }
- } else {
- /* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && (!(or_with->flags & ANYOF_FOLD)
- || (cl->flags & ANYOF_FOLD)) ) {
- int i;
-
- /* OR char bitmap and class bitmap separately */
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= or_with->bitmap[i];
- if (or_with->flags & ANYOF_CLASS) {
- for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++)
- cl->classflags[i] |= or_with->classflags[i];
- cl->flags |= ANYOF_CLASS;
- }
- }
- else { /* XXXX: logic is complicated, leave it along for a moment. */
- cl_anything(pRExC_state, cl);
- }
- }
- if (or_with->flags & ANYOF_EOS)
- cl->flags |= ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE && or_with->flags & ANYOF_UNICODE &&
- ARG(cl) != ARG(or_with)) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
- if (or_with->flags & ANYOF_UNICODE_ALL) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
-}
-
-#define TRIE_LIST_ITEM(state,idx) (trie->states[state].trans.list)[ idx ]
-#define TRIE_LIST_CUR(state) ( TRIE_LIST_ITEM( state, 0 ).forid )
-#define TRIE_LIST_LEN(state) ( TRIE_LIST_ITEM( state, 0 ).newstate )
-#define TRIE_LIST_USED(idx) ( trie->states[state].trans.list ? (TRIE_LIST_CUR( idx ) - 1) : 0 )
-
-
-#ifdef DEBUGGING
-/*
- dump_trie(trie,widecharmap,revcharmap)
- dump_trie_interim_list(trie,widecharmap,revcharmap,next_alloc)
- dump_trie_interim_table(trie,widecharmap,revcharmap,next_alloc)
-
- These routines dump out a trie in a somewhat readable format.
- The _interim_ variants are used for debugging the interim
- tables that are used to generate the final compressed
- representation which is what dump_trie expects.
-
- Part of the reason for their existance is to provide a form
- of documentation as to how the different representations function.
-
-*/
-
-/*
- Dumps the final compressed table form of the trie to Perl_debug_log.
- Used for debugging make_trie().
-*/
-
-STATIC void
-S_dump_trie(pTHX_ const struct _reg_trie_data *trie, HV *widecharmap,
- AV *revcharmap, U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE;
-
- PerlIO_printf( Perl_debug_log, "%*sChar : %-6s%-6s%-4s ",
- (int)depth * 2 + 2,"",
- "Match","Base","Ofs" );
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ ) {
- SV ** const tmp = av_fetch( revcharmap, state, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
- PerlIO_printf( Perl_debug_log, "\n%*sState|-----------------------",
- (int)depth * 2 + 2,"");
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ )
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth, "--------");
- PerlIO_printf( Perl_debug_log, "\n");
-
- for( state = 1 ; state < trie->statecount ; state++ ) {
- const U32 base = trie->states[ state ].trans.base;
-
- PerlIO_printf( Perl_debug_log, "%*s#%4"UVXf"|", (int)depth * 2 + 2,"", (UV)state);
-
- if ( trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " W%4X", trie->states[ state ].wordnum );
- } else {
- PerlIO_printf( Perl_debug_log, "%6s", "" );
- }
-
- PerlIO_printf( Perl_debug_log, " @%4"UVXf" ", (UV)base );
-
- if ( base ) {
- U32 ofs = 0;
-
- while( ( base + ofs < trie->uniquecharcount ) ||
- ( base + ofs - trie->uniquecharcount < trie->lasttrans
- && trie->trans[ base + ofs - trie->uniquecharcount ].check != state))
- ofs++;
-
- PerlIO_printf( Perl_debug_log, "+%2"UVXf"[ ", (UV)ofs);
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- PerlIO_printf( Perl_debug_log, "%*"UVXf,
- colwidth,
- (UV)trie->trans[ base + ofs - trie->uniquecharcount ].next );
- } else {
- PerlIO_printf( Perl_debug_log, "%*s",colwidth," ." );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "]");
-
- }
- PerlIO_printf( Perl_debug_log, "\n" );
- }
-}
-/*
- Dumps a fully constructed but uncompressed trie in list form.
- List tries normally only are used for construction when the number of
- possible chars (trie->uniquecharcount) is very high.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_list(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_LIST;
-
- /* print out the table precompression. */
- PerlIO_printf( Perl_debug_log, "%*sState :Word | Transition Data\n%*s%s",
- (int)depth * 2 + 2,"", (int)depth * 2 + 2,"",
- "------:-----+-----------------\n" );
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U16 charid;
-
- PerlIO_printf( Perl_debug_log, "%*s %4"UVXf" :",
- (int)depth * 2 + 2,"", (UV)state );
- if ( ! trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, "%5s| ","");
- } else {
- PerlIO_printf( Perl_debug_log, "W%4x| ",
- trie->states[ state ].wordnum
- );
- }
- for( charid = 1 ; charid <= TRIE_LIST_USED( state ) ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, TRIE_LIST_ITEM(state,charid).forid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s:%3X=%4"UVXf" | ",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- ) ,
- TRIE_LIST_ITEM(state,charid).forid,
- (UV)TRIE_LIST_ITEM(state,charid).newstate
- );
- if (!(charid % 10))
- PerlIO_printf(Perl_debug_log, "\n%*s| ",
- (int)((depth * 2) + 14), "");
- }
- }
- PerlIO_printf( Perl_debug_log, "\n");
- }
-}
-
-/*
- Dumps a fully constructed but uncompressed trie in table form.
- This is the normal DFA style state transition table, with a few
- twists to facilitate compression later.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_table(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- U16 charid;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_TABLE;
-
- /*
- print out the table precompression so that we can do a visual check
- that they are identical.
- */
-
- PerlIO_printf( Perl_debug_log, "%*sChar : ",(int)depth * 2 + 2,"" );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, charid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "\n%*sState+-",(int)depth * 2 + 2,"" );
-
- for( charid=0 ; charid < trie->uniquecharcount ; charid++ ) {
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth,"--------");
- }
-
- PerlIO_printf( Perl_debug_log, "\n" );
-
- for( state=1 ; state < next_alloc ; state += trie->uniquecharcount ) {
-
- PerlIO_printf( Perl_debug_log, "%*s%4"UVXf" : ",
- (int)depth * 2 + 2,"",
- (UV)TRIE_NODENUM( state ) );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- UV v=(UV)SAFE_TRIE_NODENUM( trie->trans[ state + charid ].next );
- if (v)
- PerlIO_printf( Perl_debug_log, "%*"UVXf, colwidth, v );
- else
- PerlIO_printf( Perl_debug_log, "%*s", colwidth, "." );
- }
- if ( ! trie->states[ TRIE_NODENUM( state ) ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf")\n", (UV)trie->trans[ state ].check );
- } else {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf") W%4X\n", (UV)trie->trans[ state ].check,
- trie->states[ TRIE_NODENUM( state ) ].wordnum );
- }
- }
-}
-
-#endif
-
-/* make_trie(startbranch,first,last,tail,word_count,flags,depth)
- startbranch: the first branch in the whole branch sequence
- first : start branch of sequence of branch-exact nodes.
- May be the same as startbranch
- last : Thing following the last branch.
- May be the same as tail.
- tail : item following the branch sequence
- count : words in the sequence
- flags : currently the OP() type we will be building one of /EXACT(|F|Fl)/
- depth : indent depth
-
-Inplace optimizes a sequence of 2 or more Branch-Exact nodes into a TRIE node.
-
-A trie is an N'ary tree where the branches are determined by digital
-decomposition of the key. IE, at the root node you look up the 1st character and
-follow that branch repeat until you find the end of the branches. Nodes can be
-marked as "accepting" meaning they represent a complete word. Eg:
-
- /he|she|his|hers/
-
-would convert into the following structure. Numbers represent states, letters
-following numbers represent valid transitions on the letter from that state, if
-the number is in square brackets it represents an accepting state, otherwise it
-will be in parenthesis.
-
- +-h->+-e->[3]-+-r->(8)-+-s->[9]
- | |
- | (2)
- | |
- (1) +-i->(6)-+-s->[7]
- |
- +-s->(3)-+-h->(4)-+-e->[5]
-
- Accept Word Mapping: 3=>1 (he),5=>2 (she), 7=>3 (his), 9=>4 (hers)
-
-This shows that when matching against the string 'hers' we will begin at state 1
-read 'h' and move to state 2, read 'e' and move to state 3 which is accepting,
-then read 'r' and go to state 8 followed by 's' which takes us to state 9 which
-is also accepting. Thus we know that we can match both 'he' and 'hers' with a
-single traverse. We store a mapping from accepting to state to which word was
-matched, and then when we have multiple possibilities we try to complete the
-rest of the regex in the order in which they occured in the alternation.
-
-The only prior NFA like behaviour that would be changed by the TRIE support is
-the silent ignoring of duplicate alternations which are of the form:
-
- / (DUPE|DUPE) X? (?{ ... }) Y /x
-
-Thus EVAL blocks follwing a trie may be called a different number of times with
-and without the optimisation. With the optimisations dupes will be silently
-ignored. This inconsistant behaviour of EVAL type nodes is well established as
-the following demonstrates:
-
- 'words'=~/(word|word|word)(?{ print $1 })[xyz]/
-
-which prints out 'word' three times, but
-
- 'words'=~/(word|word|word)(?{ print $1 })S/
-
-which doesnt print it out at all. This is due to other optimisations kicking in.
-
-Example of what happens on a structural level:
-
-The regexp /(ac|ad|ab)+/ will produce the folowing debug output:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: BRANCH(8)
- 6: EXACT <ac>(16)
- 8: BRANCH(11)
- 9: EXACT <ad>(16)
- 11: BRANCH(14)
- 12: EXACT <ab>(16)
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-This would be optimizable with startbranch=5, first=5, last=16, tail=16
-and should turn into:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: TRIE(16)
- [Words:3 Chars Stored:6 Unique Chars:4 States:5 NCP:1]
- <ac>
- <ad>
- <ab>
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-Cases where tail != last would be like /(?foo|bar)baz/:
-
- 1: BRANCH(4)
- 2: EXACT <foo>(8)
- 4: BRANCH(7)
- 5: EXACT <bar>(8)
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
-which would be optimizable with startbranch=1, first=1, last=7, tail=8
-and would end up looking like:
-
- 1: TRIE(8)
- [Words:2 Chars Stored:6 Unique Chars:5 States:7 NCP:1]
- <foo>
- <bar>
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
- d = uvuni_to_utf8_flags(d, uv, 0);
-
-is the recommended Unicode-aware way of saying
-
- *(d++) = uv;
-*/
-
-#define TRIE_STORE_REVCHAR \
- STMT_START { \
- if (UTF) { \
- SV *zlopp = newSV(2); \
- unsigned char *flrbbbbb = (unsigned char *) SvPVX(zlopp); \
- unsigned const char *const kapow = uvuni_to_utf8(flrbbbbb, uvc & 0xFF); \
- SvCUR_set(zlopp, kapow - flrbbbbb); \
- SvPOK_on(zlopp); \
- SvUTF8_on(zlopp); \
- av_push(revcharmap, zlopp); \
- } else { \
- char ooooff = (char)uvc; \
- av_push(revcharmap, newSVpvn(&ooooff, 1)); \
- } \
- } STMT_END
-
-#define TRIE_READ_CHAR STMT_START { \
- wordlen++; \
- if ( UTF ) { \
- if ( folder ) { \
- if ( foldlen > 0 ) { \
- uvc = utf8n_to_uvuni( scan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- scan += len; \
- len = 0; \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- scan = foldbuf + UNISKIP( uvc ); \
- } \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- } \
- } else { \
- uvc = (U32)*uc; \
- len = 1; \
- } \
-} STMT_END
-
-
-
-#define TRIE_LIST_PUSH(state,fid,ns) STMT_START { \
- if ( TRIE_LIST_CUR( state ) >=TRIE_LIST_LEN( state ) ) { \
- U32 ging = TRIE_LIST_LEN( state ) *= 2; \
- Renew( trie->states[ state ].trans.list, ging, reg_trie_trans_le ); \
- } \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).forid = fid; \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).newstate = ns; \
- TRIE_LIST_CUR( state )++; \
-} STMT_END
-
-#define TRIE_LIST_NEW(state) STMT_START { \
- Newxz( trie->states[ state ].trans.list, \
- 4, reg_trie_trans_le ); \
- TRIE_LIST_CUR( state ) = 1; \
- TRIE_LIST_LEN( state ) = 4; \
-} STMT_END
-
-#define TRIE_HANDLE_WORD(state) STMT_START { \
- U16 dupe= trie->states[ state ].wordnum; \
- regnode * const noper_next = regnext( noper ); \
- \
- if (trie->wordlen) \
- trie->wordlen[ curword ] = wordlen; \
- DEBUG_r({ \
- /* store the word for dumping */ \
- SV* tmp; \
- if (OP(noper) != NOTHING) \
- tmp = newSVpvn_utf8(STRING(noper), STR_LEN(noper), UTF); \
- else \
- tmp = newSVpvn_utf8( "", 0, UTF ); \
- av_push( trie_words, tmp ); \
- }); \
- \
- curword++; \
- \
- if ( noper_next < tail ) { \
- if (!trie->jump) \
- trie->jump = (U16 *) PerlMemShared_calloc( word_count + 1, sizeof(U16) ); \
- trie->jump[curword] = (U16)(noper_next - convert); \
- if (!jumper) \
- jumper = noper_next; \
- if (!nextbranch) \
- nextbranch= regnext(cur); \
- } \
- \
- if ( dupe ) { \
- /* So it's a dupe. This means we need to maintain a */\
- /* linked-list from the first to the next. */\
- /* we only allocate the nextword buffer when there */\
- /* a dupe, so first time we have to do the allocation */\
- if (!trie->nextword) \
- trie->nextword = (U16 *) \
- PerlMemShared_calloc( word_count + 1, sizeof(U16)); \
- while ( trie->nextword[dupe] ) \
- dupe= trie->nextword[dupe]; \
- trie->nextword[dupe]= curword; \
- } else { \
- /* we haven't inserted this word yet. */ \
- trie->states[ state ].wordnum = curword; \
- } \
-} STMT_END
-
-
-#define TRIE_TRANS_STATE(state,base,ucharcount,charid,special) \
- ( ( base + charid >= ucharcount \
- && base + charid < ubound \
- && state == trie->trans[ base - ucharcount + charid ].check \
- && trie->trans[ base - ucharcount + charid ].next ) \
- ? trie->trans[ base - ucharcount + charid ].next \
- : ( state==1 ? special : 0 ) \
- )
-
-#define MADE_TRIE 1
-#define MADE_JUMP_TRIE 2
-#define MADE_EXACT_TRIE 4
-
-STATIC I32
-S_make_trie(pTHX_ RExC_state_t *pRExC_state, regnode *startbranch, regnode *first, regnode *last, regnode *tail, U32 word_count, U32 flags, U32 depth)
-{
- dVAR;
- /* first pass, loop through and scan words */
- reg_trie_data *trie;
- HV *widecharmap = NULL;
- AV *revcharmap = newAV();
- regnode *cur;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- STRLEN len = 0;
- UV uvc = 0;
- U16 curword = 0;
- U32 next_alloc = 0;
- regnode *jumper = NULL;
- regnode *nextbranch = NULL;
- regnode *convert = NULL;
- /* we just use folder as a flag in utf8 */
- const U8 * const folder = ( flags == EXACTF
- ? PL_fold
- : ( flags == EXACTFL
- ? PL_fold_locale
- : NULL
- )
- );
-
-#ifdef DEBUGGING
- const U32 data_slot = add_data( pRExC_state, 4, "tuuu" );
- AV *trie_words = NULL;
- /* along with revcharmap, this only used during construction but both are
- * useful during debugging so we store them in the struct when debugging.
- */
-#else
- const U32 data_slot = add_data( pRExC_state, 2, "tu" );
- STRLEN trie_charcount=0;
-#endif
- SV *re_trie_maxbuff;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- trie = (reg_trie_data *) PerlMemShared_calloc( 1, sizeof(reg_trie_data) );
- trie->refcount = 1;
- trie->startstate = 1;
- trie->wordcount = word_count;
- RExC_rxi->data->data[ data_slot ] = (void*)trie;
- trie->charmap = (U16 *) PerlMemShared_calloc( 256, sizeof(U16) );
- if (!(UTF && folder))
- trie->bitmap = (char *) PerlMemShared_calloc( ANYOF_BITMAP_SIZE, 1 );
- DEBUG_r({
- trie_words = newAV();
- });
-
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff)) {
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- DEBUG_OPTIMISE_r({
- PerlIO_printf( Perl_debug_log,
- "%*smake_trie start==%d, first==%d, last==%d, tail==%d depth=%d\n",
- (int)depth * 2 + 2, "",
- REG_NODE_NUM(startbranch),REG_NODE_NUM(first),
- REG_NODE_NUM(last), REG_NODE_NUM(tail),
- (int)depth);
- });
-
- /* Find the node we are going to overwrite */
- if ( first == startbranch && OP( last ) != BRANCH ) {
- /* whole branch chain */
- convert = first;
- } else {
- /* branch sub-chain */
- convert = NEXTOPER( first );
- }
-
- /* -- First loop and Setup --
-
- We first traverse the branches and scan each word to determine if it
- contains widechars, and how many unique chars there are, this is
- important as we have to build a table with at least as many columns as we
- have unique chars.
-
- We use an array of integers to represent the character codes 0..255
- (trie->charmap) and we use a an HV* to store Unicode characters. We use the
- native representation of the character value as the key and IV's for the
- coded index.
-
- *TODO* If we keep track of how many times each character is used we can
- remap the columns so that the table compression later on is more
- efficient in terms of memory by ensuring most common value is in the
- middle and the least common are on the outside. IMO this would be better
- than a most to least common mapping as theres a decent chance the most
- common letter will share a node with the least common, meaning the node
- will not be compressable. With a middle is most common approach the worst
- case is when we have the least common nodes twice.
-
- */
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- STRLEN foldlen = 0;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- const U8 *scan = (U8*)NULL;
- U32 wordlen = 0; /* required init */
- STRLEN chars = 0;
- bool set_bit = trie->bitmap ? 1 : 0; /*store the first char in the bitmap?*/
-
- if (OP(noper) == NOTHING) {
- trie->minlen= 0;
- continue;
- }
- if ( set_bit ) /* bitmap only alloced when !(UTF&&Folding) */
- TRIE_BITMAP_SET(trie,*uc); /* store the raw first byte
- regardless of encoding */
-
- for ( ; uc < e ; uc += len ) {
- TRIE_CHARCOUNT(trie)++;
- TRIE_READ_CHAR;
- chars++;
- if ( uvc < 256 ) {
- if ( !trie->charmap[ uvc ] ) {
- trie->charmap[ uvc ]=( ++trie->uniquecharcount );
- if ( folder )
- trie->charmap[ folder[ uvc ] ] = trie->charmap[ uvc ];
- TRIE_STORE_REVCHAR;
- }
- if ( set_bit ) {
- /* store the codepoint in the bitmap, and if its ascii
- also store its folded equivelent. */
- TRIE_BITMAP_SET(trie,uvc);
-
- /* store the folded codepoint */
- if ( folder ) TRIE_BITMAP_SET(trie,folder[ uvc ]);
-
- if ( !UTF ) {
- /* store first byte of utf8 representation of
- codepoints in the 127 < uvc < 256 range */
- if (127 < uvc && uvc < 192) {
- TRIE_BITMAP_SET(trie,194);
- } else if (191 < uvc ) {
- TRIE_BITMAP_SET(trie,195);
- /* && uvc < 256 -- we know uvc is < 256 already */
- }
- }
- set_bit = 0; /* We've done our bit :-) */
- }
- } else {
- SV** svpp;
- if ( !widecharmap )
- widecharmap = newHV();
-
- svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 1 );
-
- if ( !svpp )
- Perl_croak( aTHX_ "error creating/fetching widecharmap entry for 0x%"UVXf, uvc );
-
- if ( !SvTRUE( *svpp ) ) {
- sv_setiv( *svpp, ++trie->uniquecharcount );
- TRIE_STORE_REVCHAR;
- }
- }
- }
- if( cur == first ) {
- trie->minlen=chars;
- trie->maxlen=chars;
- } else if (chars < trie->minlen) {
- trie->minlen=chars;
- } else if (chars > trie->maxlen) {
- trie->maxlen=chars;
- }
-
- } /* end first pass */
- DEBUG_TRIE_COMPILE_r(
- PerlIO_printf( Perl_debug_log, "%*sTRIE(%s): W:%d C:%d Uq:%d Min:%d Max:%d\n",
- (int)depth * 2 + 2,"",
- ( widecharmap ? "UTF8" : "NATIVE" ), (int)word_count,
- (int)TRIE_CHARCOUNT(trie), trie->uniquecharcount,
- (int)trie->minlen, (int)trie->maxlen )
- );
- trie->wordlen = (U32 *) PerlMemShared_calloc( word_count, sizeof(U32) );
-
- /*
- We now know what we are dealing with in terms of unique chars and
- string sizes so we can calculate how much memory a naive
- representation using a flat table will take. If it's over a reasonable
- limit (as specified by ${^RE_TRIE_MAXBUF}) we use a more memory
- conservative but potentially much slower representation using an array
- of lists.
-
- At the end we convert both representations into the same compressed
- form that will be used in regexec.c for matching with. The latter
- is a form that cannot be used to construct with but has memory
- properties similar to the list form and access properties similar
- to the table form making it both suitable for fast searches and
- small enough that its feasable to store for the duration of a program.
-
- See the comment in the code where the compressed table is produced
- inplace from the flat tabe representation for an explanation of how
- the compression works.
-
- */
-
-
- if ( (IV)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1) > SvIV(re_trie_maxbuff) ) {
- /*
- Second Pass -- Array Of Lists Representation
-
- Each state will be represented by a list of charid:state records
- (reg_trie_trans_le) the first such element holds the CUR and LEN
- points of the allocated array. (See defines above).
-
- We build the initial structure using the lists, and then convert
- it into the compressed table form which allows faster lookups
- (but cant be modified once converted).
- */
-
- STRLEN transcount = 1;
-
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using list compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- TRIE_LIST_NEW(1);
- next_alloc = 2;
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- U32 state = 1; /* required init */
- U16 charid = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if (OP(noper) != NOTHING) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV** const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- if ( !svpp ) {
- charid = 0;
- } else {
- charid=(U16)SvIV( *svpp );
- }
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- if ( charid ) {
-
- U16 check;
- U32 newstate = 0;
-
- charid--;
- if ( !trie->states[ state ].trans.list ) {
- TRIE_LIST_NEW( state );
- }
- for ( check = 1; check <= TRIE_LIST_USED( state ); check++ ) {
- if ( TRIE_LIST_ITEM( state, check ).forid == charid ) {
- newstate = TRIE_LIST_ITEM( state, check ).newstate;
- break;
- }
- }
- if ( ! newstate ) {
- newstate = next_alloc++;
- TRIE_LIST_PUSH( state, charid, newstate );
- transcount++;
- }
- state = newstate;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- }
- }
- TRIE_HANDLE_WORD(state);
-
- } /* end second pass */
-
- /* next alloc is the NEXT state to be allocated */
- trie->statecount = next_alloc;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states,
- next_alloc
- * sizeof(reg_trie_state) );
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_list(trie, widecharmap,
- revcharmap, next_alloc,
- depth+1)
- );
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( transcount, sizeof(reg_trie_trans) );
- {
- U32 state;
- U32 tp = 0;
- U32 zp = 0;
-
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U32 base=0;
-
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, "tp: %d zp: %d ",tp,zp)
- );
- */
-
- if (trie->states[state].trans.list) {
- U16 minid=TRIE_LIST_ITEM( state, 1).forid;
- U16 maxid=minid;
- U16 idx;
-
- for( idx = 2 ; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U16 forid = TRIE_LIST_ITEM( state, idx).forid;
- if ( forid < minid ) {
- minid=forid;
- } else if ( forid > maxid ) {
- maxid=forid;
- }
- }
- if ( transcount < tp + maxid - minid + 1) {
- transcount *= 2;
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans,
- transcount
- * sizeof(reg_trie_trans) );
- Zero( trie->trans + (transcount / 2), transcount / 2 , reg_trie_trans );
- }
- base = trie->uniquecharcount + tp - minid;
- if ( maxid == minid ) {
- U32 set = 0;
- for ( ; zp < tp ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- base = trie->uniquecharcount + zp - minid;
- trie->trans[ zp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ zp ].check = state;
- set = 1;
- break;
- }
- }
- if ( !set ) {
- trie->trans[ tp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ tp ].check = state;
- tp++;
- zp = tp;
- }
- } else {
- for ( idx=1; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U32 tid = base - trie->uniquecharcount + TRIE_LIST_ITEM( state, idx ).forid;
- trie->trans[ tid ].next = TRIE_LIST_ITEM( state, idx ).newstate;
- trie->trans[ tid ].check = state;
- }
- tp += ( maxid - minid + 1 );
- }
- Safefree(trie->states[ state ].trans.list);
- }
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, " base: %d\n",base);
- );
- */
- trie->states[ state ].trans.base=base;
- }
- trie->lasttrans = tp + 1;
- }
- } else {
- /*
- Second Pass -- Flat Table Representation.
-
- we dont use the 0 slot of either trans[] or states[] so we add 1 to each.
- We know that we will need Charcount+1 trans at most to store the data
- (one row per char at worst case) So we preallocate both structures
- assuming worst case.
-
- We then construct the trie using only the .next slots of the entry
- structs.
-
- We use the .check field of the first entry of the node temporarily to
- make compression both faster and easier by keeping track of how many non
- zero fields are in the node.
-
- Since trans are numbered from 1 any 0 pointer in the table is a FAIL
- transition.
-
- There are two terms at use here: state as a TRIE_NODEIDX() which is a
- number representing the first entry of the node, and state as a
- TRIE_NODENUM() which is the trans number. state 1 is TRIE_NODEIDX(1) and
- TRIE_NODENUM(1), state 2 is TRIE_NODEIDX(2) and TRIE_NODENUM(3) if there
- are 2 entrys per node. eg:
-
- A B A B
- 1. 2 4 1. 3 7
- 2. 0 3 3. 0 5
- 3. 0 0 5. 0 0
- 4. 0 0 7. 0 0
-
- The table is internally in the right hand, idx form. However as we also
- have to deal with the states array which is indexed by nodenum we have to
- use TRIE_NODENUM() to convert.
-
- */
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using table compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( ( TRIE_CHARCOUNT(trie) + 1 )
- * trie->uniquecharcount + 1,
- sizeof(reg_trie_trans) );
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- next_alloc = trie->uniquecharcount + 1;
-
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
-
- U32 state = 1; /* required init */
-
- U16 charid = 0; /* sanity init */
- U32 accept_state = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
-
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if ( OP(noper) != NOTHING ) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV* const * const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- charid = svpp ? (U16)SvIV(*svpp) : 0;
- }
- if ( charid ) {
- charid--;
- if ( !trie->trans[ state + charid ].next ) {
- trie->trans[ state + charid ].next = next_alloc;
- trie->trans[ state ].check++;
- next_alloc += trie->uniquecharcount;
- }
- state = trie->trans[ state + charid ].next;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- }
- }
- accept_state = TRIE_NODENUM( state );
- TRIE_HANDLE_WORD(accept_state);
-
- } /* end second pass */
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_table(trie, widecharmap,
- revcharmap,
- next_alloc, depth+1));
-
- {
- /*
- * Inplace compress the table.*
-
- For sparse data sets the table constructed by the trie algorithm will
- be mostly 0/FAIL transitions or to put it another way mostly empty.
- (Note that leaf nodes will not contain any transitions.)
-
- This algorithm compresses the tables by eliminating most such
- transitions, at the cost of a modest bit of extra work during lookup:
-
- - Each states[] entry contains a .base field which indicates the
- index in the state[] array wheres its transition data is stored.
-
- - If .base is 0 there are no valid transitions from that node.
-
- - If .base is nonzero then charid is added to it to find an entry in
- the trans array.
-
- -If trans[states[state].base+charid].check!=state then the
- transition is taken to be a 0/Fail transition. Thus if there are fail
- transitions at the front of the node then the .base offset will point
- somewhere inside the previous nodes data (or maybe even into a node
- even earlier), but the .check field determines if the transition is
- valid.
-
- XXX - wrong maybe?
- The following process inplace converts the table to the compressed
- table: We first do not compress the root node 1,and mark its all its
- .check pointers as 1 and set its .base pointer as 1 as well. This
- allows to do a DFA construction from the compressed table later, and
- ensures that any .base pointers we calculate later are greater than
- 0.
-
- - We set 'pos' to indicate the first entry of the second node.
-
- - We then iterate over the columns of the node, finding the first and
- last used entry at l and m. We then copy l..m into pos..(pos+m-l),
- and set the .check pointers accordingly, and advance pos
- appropriately and repreat for the next node. Note that when we copy
- the next pointers we have to convert them from the original
- NODEIDX form to NODENUM form as the former is not valid post
- compression.
-
- - If a node has no transitions used we mark its base as 0 and do not
- advance the pos pointer.
-
- - If a node only has one transition we use a second pointer into the
- structure to fill in allocated fail transitions from other states.
- This pointer is independent of the main pointer and scans forward
- looking for null transitions that are allocated to a state. When it
- finds one it writes the single transition into the "hole". If the
- pointer doesnt find one the single transition is appended as normal.
-
- - Once compressed we can Renew/realloc the structures to release the
- excess space.
-
- See "Table-Compression Methods" in sec 3.9 of the Red Dragon,
- specifically Fig 3.47 and the associated pseudocode.
-
- demq
- */
- const U32 laststate = TRIE_NODENUM( next_alloc );
- U32 state, charid;
- U32 pos = 0, zp=0;
- trie->statecount = laststate;
-
- for ( state = 1 ; state < laststate ; state++ ) {
- U8 flag = 0;
- const U32 stateidx = TRIE_NODEIDX( state );
- const U32 o_used = trie->trans[ stateidx ].check;
- U32 used = trie->trans[ stateidx ].check;
- trie->trans[ stateidx ].check = 0;
-
- for ( charid = 0 ; used && charid < trie->uniquecharcount ; charid++ ) {
- if ( flag || trie->trans[ stateidx + charid ].next ) {
- if ( trie->trans[ stateidx + charid ].next ) {
- if (o_used == 1) {
- for ( ; zp < pos ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- break;
- }
- }
- trie->states[ state ].trans.base = zp + trie->uniquecharcount - charid ;
- trie->trans[ zp ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ zp ].check = state;
- if ( ++zp > pos ) pos = zp;
- break;
- }
- used--;
- }
- if ( !flag ) {
- flag = 1;
- trie->states[ state ].trans.base = pos + trie->uniquecharcount - charid ;
- }
- trie->trans[ pos ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ pos ].check = state;
- pos++;
- }
- }
- }
- trie->lasttrans = pos + 1;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states, laststate
- * sizeof(reg_trie_state) );
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log,
- "%*sAlloc: %d Orig: %"IVdf" elements, Final:%"IVdf". Savings of %%%5.2f\n",
- (int)depth * 2 + 2,"",
- (int)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1 ),
- (IV)next_alloc,
- (IV)pos,
- ( ( next_alloc - pos ) * 100 ) / (double)next_alloc );
- );
-
- } /* end table compress */
- }
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf(Perl_debug_log, "%*sStatecount:%"UVxf" Lasttrans:%"UVxf"\n",
- (int)depth * 2 + 2, "",
- (UV)trie->statecount,
- (UV)trie->lasttrans)
- );
- /* resize the trans array to remove unused space */
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans, trie->lasttrans
- * sizeof(reg_trie_trans) );
-
- /* and now dump out the compressed format */
- DEBUG_TRIE_COMPILE_r(dump_trie(trie, widecharmap, revcharmap, depth+1));
-
- { /* Modify the program and insert the new TRIE node*/
- U8 nodetype =(U8)(flags & 0xFF);
- char *str=NULL;
-
-#ifdef DEBUGGING
- regnode *optimize = NULL;
-#ifdef RE_TRACK_PATTERN_OFFSETS
-
- U32 mjd_offset = 0;
- U32 mjd_nodelen = 0;
-#endif /* RE_TRACK_PATTERN_OFFSETS */
-#endif /* DEBUGGING */
- /*
- This means we convert either the first branch or the first Exact,
- depending on whether the thing following (in 'last') is a branch
- or not and whther first is the startbranch (ie is it a sub part of
- the alternation or is it the whole thing.)
- Assuming its a sub part we conver the EXACT otherwise we convert
- the whole branch sequence, including the first.
- */
- /* Find the node we are going to overwrite */
- if ( first != startbranch || OP( last ) == BRANCH ) {
- /* branch sub-chain */
- NEXT_OFF( first ) = (U16)(last - first);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_r({
- mjd_offset= Node_Offset((convert));
- mjd_nodelen= Node_Length((convert));
- });
-#endif
- /* whole branch chain */
- }
-#ifdef RE_TRACK_PATTERN_OFFSETS
- else {
- DEBUG_r({
- const regnode *nop = NEXTOPER( convert );
- mjd_offset= Node_Offset((nop));
- mjd_nodelen= Node_Length((nop));
- });
- }
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%*sMJD offset:%"UVuf" MJD length:%"UVuf"\n",
- (int)depth * 2 + 2, "",
- (UV)mjd_offset, (UV)mjd_nodelen)
- );
-#endif
- /* But first we check to see if there is a common prefix we can
- split out as an EXACT and put in front of the TRIE node. */
- trie->startstate= 1;
- if ( trie->bitmap && !widecharmap && !trie->jump ) {
- U32 state;
- for ( state = 1 ; state < trie->statecount-1 ; state++ ) {
- U32 ofs = 0;
- I32 idx = -1;
- U32 count = 0;
- const U32 base = trie->states[ state ].trans.base;
-
- if ( trie->states[state].wordnum )
- count = 1;
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- if ( ++count > 1 ) {
- SV **tmp = av_fetch( revcharmap, ofs, 0);
- const U8 *ch = (U8*)SvPV_nolen_const( *tmp );
- if ( state == 1 ) break;
- if ( count == 2 ) {
- Zero(trie->bitmap, ANYOF_BITMAP_SIZE, char);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*sNew Start State=%"UVuf" Class: [",
- (int)depth * 2 + 2, "",
- (UV)state));
- if (idx >= 0) {
- SV ** const tmp = av_fetch( revcharmap, idx, 0);
- const U8 * const ch = (U8*)SvPV_nolen_const( *tmp );
-
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie, folder[ *ch ]);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%s", (char*)ch)
- );
- }
- }
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie,folder[ *ch ]);
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"%s", ch));
- }
- idx = ofs;
- }
- }
- if ( count == 1 ) {
- SV **tmp = av_fetch( revcharmap, idx, 0);
- STRLEN len;
- char *ch = SvPV( *tmp, len );
- DEBUG_OPTIMISE_r({
- SV *sv=sv_newmortal();
- PerlIO_printf( Perl_debug_log,
- "%*sPrefix State: %"UVuf" Idx:%"UVuf" Char='%s'\n",
- (int)depth * 2 + 2, "",
- (UV)state, (UV)idx,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 6,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- });
- if ( state==1 ) {
- OP( convert ) = nodetype;
- str=STRING(convert);
- STR_LEN(convert)=0;
- }
- STR_LEN(convert) += len;
- while (len--)
- *str++ = *ch++;
- } else {
-#ifdef DEBUGGING
- if (state>1)
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"]\n"));
-#endif
- break;
- }
- }
- if (str) {
- regnode *n = convert+NODE_SZ_STR(convert);
- NEXT_OFF(convert) = NODE_SZ_STR(convert);
- trie->startstate = state;
- trie->minlen -= (state - 1);
- trie->maxlen -= (state - 1);
-#ifdef DEBUGGING
- /* At least the UNICOS C compiler choked on this
- * being argument to DEBUG_r(), so let's just have
- * it right here. */
- if (
-#ifdef PERL_EXT_RE_BUILD
- 1
-#else
- DEBUG_r_TEST
-#endif
- ) {
- regnode *fix = convert;
- U32 word = trie->wordcount;
- mjd_nodelen++;
- Set_Node_Offset_Length(convert, mjd_offset, state - 1);
- while( ++fix < n ) {
- Set_Node_Offset_Length(fix, 0, 0);
- }
- while (word--) {
- SV ** const tmp = av_fetch( trie_words, word, 0 );
- if (tmp) {
- if ( STR_LEN(convert) <= SvCUR(*tmp) )
- sv_chop(*tmp, SvPV_nolen(*tmp) + STR_LEN(convert));
- else
- sv_chop(*tmp, SvPV_nolen(*tmp) + SvCUR(*tmp));
- }
- }
- }
-#endif
- if (trie->maxlen) {
- convert = n;
- } else {
- NEXT_OFF(convert) = (U16)(tail - convert);
- DEBUG_r(optimize= n);
- }
- }
- }
- if (!jumper)
- jumper = last;
- if ( trie->maxlen ) {
- NEXT_OFF( convert ) = (U16)(tail - convert);
- ARG_SET( convert, data_slot );
- /* Store the offset to the first unabsorbed branch in
- jump[0], which is otherwise unused by the jump logic.
- We use this when dumping a trie and during optimisation. */
- if (trie->jump)
- trie->jump[0] = (U16)(nextbranch - convert);
-
- /* XXXX */
- if ( !trie->states[trie->startstate].wordnum && trie->bitmap &&
- ( (char *)jumper - (char *)convert) >= (int)sizeof(struct regnode_charclass) )
- {
- OP( convert ) = TRIEC;
- Copy(trie->bitmap, ((struct regnode_charclass *)convert)->bitmap, ANYOF_BITMAP_SIZE, char);
- PerlMemShared_free(trie->bitmap);
- trie->bitmap= NULL;
- } else
- OP( convert ) = TRIE;
-
- /* store the type in the flags */
- convert->flags = nodetype;
- DEBUG_r({
- optimize = convert
- + NODE_STEP_REGNODE
- + regarglen[ OP( convert ) ];
- });
- /* XXX We really should free up the resource in trie now,
- as we won't use them - (which resources?) dmq */
- }
- /* needed for dumping*/
- DEBUG_r(if (optimize) {
- regnode *opt = convert;
-
- while ( ++opt < optimize) {
- Set_Node_Offset_Length(opt,0,0);
- }
- /*
- Try to clean up some of the debris left after the
- optimisation.
- */
- while( optimize < jumper ) {
- mjd_nodelen += Node_Length((optimize));
- OP( optimize ) = OPTIMIZED;
- Set_Node_Offset_Length(optimize,0,0);
- optimize++;
- }
- Set_Node_Offset_Length(convert,mjd_offset,mjd_nodelen);
- });
- } /* end node insert */
- RExC_rxi->data->data[ data_slot + 1 ] = (void*)widecharmap;
-#ifdef DEBUGGING
- RExC_rxi->data->data[ data_slot + TRIE_WORDS_OFFSET ] = (void*)trie_words;
- RExC_rxi->data->data[ data_slot + 3 ] = (void*)revcharmap;
-#else
- SvREFCNT_dec(revcharmap);
-#endif
- return trie->jump
- ? MADE_JUMP_TRIE
- : trie->startstate>1
- ? MADE_EXACT_TRIE
- : MADE_TRIE;
-}
-
-STATIC void
-S_make_trie_failtable(pTHX_ RExC_state_t *pRExC_state, regnode *source, regnode *stclass, U32 depth)
-{
-/* The Trie is constructed and compressed now so we can build a fail array now if its needed
-
- This is basically the Aho-Corasick algorithm. Its from exercise 3.31 and 3.32 in the
- "Red Dragon" -- Compilers, principles, techniques, and tools. Aho, Sethi, Ullman 1985/88
- ISBN 0-201-10088-6
-
- We find the fail state for each state in the trie, this state is the longest proper
- suffix of the current states 'word' that is also a proper prefix of another word in our
- trie. State 1 represents the word '' and is the thus the default fail state. This allows
- the DFA not to have to restart after its tried and failed a word at a given point, it
- simply continues as though it had been matching the other word in the first place.
- Consider
- 'abcdgu'=~/abcdefg|cdgu/
- When we get to 'd' we are still matching the first word, we would encounter 'g' which would
- fail, which would bring use to the state representing 'd' in the second word where we would
- try 'g' and succeed, prodceding to match 'cdgu'.
- */
- /* add a fail transition */
- const U32 trie_offset = ARG(source);
- reg_trie_data *trie=(reg_trie_data *)RExC_rxi->data->data[trie_offset];
- U32 *q;
- const U32 ucharcount = trie->uniquecharcount;
- const U32 numstates = trie->statecount;
- const U32 ubound = trie->lasttrans + ucharcount;
- U32 q_read = 0;
- U32 q_write = 0;
- U32 charid;
- U32 base = trie->states[ 1 ].trans.base;
- U32 *fail;
- reg_ac_data *aho;
- const U32 data_slot = add_data( pRExC_state, 1, "T" );
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE_FAILTABLE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
-
- ARG_SET( stclass, data_slot );
- aho = (reg_ac_data *) PerlMemShared_calloc( 1, sizeof(reg_ac_data) );
- RExC_rxi->data->data[ data_slot ] = (void*)aho;
- aho->trie=trie_offset;
- aho->states=(reg_trie_state *)PerlMemShared_malloc( numstates * sizeof(reg_trie_state) );
- Copy( trie->states, aho->states, numstates, reg_trie_state );
- Newxz( q, numstates, U32);
- aho->fail = (U32 *) PerlMemShared_calloc( numstates, sizeof(U32) );
- aho->refcount = 1;
- fail = aho->fail;
- /* initialize fail[0..1] to be 1 so that we always have
- a valid final fail state */
- fail[ 0 ] = fail[ 1 ] = 1;
-
- for ( charid = 0; charid < ucharcount ; charid++ ) {
- const U32 newstate = TRIE_TRANS_STATE( 1, base, ucharcount, charid, 0 );
- if ( newstate ) {
- q[ q_write ] = newstate;
- /* set to point at the root */
- fail[ q[ q_write++ ] ]=1;
- }
- }
- while ( q_read < q_write) {
- const U32 cur = q[ q_read++ % numstates ];
- base = trie->states[ cur ].trans.base;
-
- for ( charid = 0 ; charid < ucharcount ; charid++ ) {
- const U32 ch_state = TRIE_TRANS_STATE( cur, base, ucharcount, charid, 1 );
- if (ch_state) {
- U32 fail_state = cur;
- U32 fail_base;
- do {
- fail_state = fail[ fail_state ];
- fail_base = aho->states[ fail_state ].trans.base;
- } while ( !TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ) );
-
- fail_state = TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 );
- fail[ ch_state ] = fail_state;
- if ( !aho->states[ ch_state ].wordnum && aho->states[ fail_state ].wordnum )
- {
- aho->states[ ch_state ].wordnum = aho->states[ fail_state ].wordnum;
- }
- q[ q_write++ % numstates] = ch_state;
- }
- }
- }
- /* restore fail[0..1] to 0 so that we "fall out" of the AC loop
- when we fail in state 1, this allows us to use the
- charclass scan to find a valid start char. This is based on the principle
- that theres a good chance the string being searched contains lots of stuff
- that cant be a start char.
- */
- fail[ 0 ] = fail[ 1 ] = 0;
- DEBUG_TRIE_COMPILE_r({
- PerlIO_printf(Perl_debug_log,
- "%*sStclass Failtable (%"UVuf" states): 0",
- (int)(depth * 2), "", (UV)numstates
- );
- for( q_read=1; q_read<numstates; q_read++ ) {
- PerlIO_printf(Perl_debug_log, ", %"UVuf, (UV)fail[q_read]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
- Safefree(q);
- /*RExC_seen |= REG_SEEN_TRIEDFA;*/
-}
-
-
-/*
- * There are strange code-generation bugs caused on sparc64 by gcc-2.95.2.
- * These need to be revisited when a newer toolchain becomes available.
- */
-#if defined(__sparc64__) && defined(__GNUC__)
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
-# undef SPARC64_GCC_WORKAROUND
-# define SPARC64_GCC_WORKAROUND 1
-# endif
-#endif
-
-#define DEBUG_PEEP(str,scan,depth) \
- DEBUG_OPTIMISE_r({if (scan){ \
- SV * const mysv=sv_newmortal(); \
- regnode *Next = regnext(scan); \
- regprop(RExC_rx, mysv, scan); \
- PerlIO_printf(Perl_debug_log, "%*s" str ">%3d: %s (%d)\n", \
- (int)depth*2, "", REG_NODE_NUM(scan), SvPV_nolen_const(mysv),\
- Next ? (REG_NODE_NUM(Next)) : 0 ); \
- }});
-
-
-
-
-
-#define JOIN_EXACT(scan,min,flags) \
- if (PL_regkind[OP(scan)] == EXACT) \
- join_exact(pRExC_state,(scan),(min),(flags),NULL,depth+1)
-
-STATIC U32
-S_join_exact(pTHX_ RExC_state_t *pRExC_state, regnode *scan, I32 *min, U32 flags,regnode *val, U32 depth) {
- /* Merge several consecutive EXACTish nodes into one. */
- regnode *n = regnext(scan);
- U32 stringok = 1;
- regnode *next = scan + NODE_SZ_STR(scan);
- U32 merged = 0;
- U32 stopnow = 0;
-#ifdef DEBUGGING
- regnode *stop = scan;
- GET_RE_DEBUG_FLAGS_DECL;
-#else
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_JOIN_EXACT;
-#ifndef EXPERIMENTAL_INPLACESCAN
- PERL_UNUSED_ARG(flags);
- PERL_UNUSED_ARG(val);
-#endif
- DEBUG_PEEP("join",scan,depth);
-
- /* Skip NOTHING, merge EXACT*. */
- while (n &&
- ( PL_regkind[OP(n)] == NOTHING ||
- (stringok && (OP(n) == OP(scan))))
- && NEXT_OFF(n)
- && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) {
-
- if (OP(n) == TAIL || n > next)
- stringok = 0;
- if (PL_regkind[OP(n)] == NOTHING) {
- DEBUG_PEEP("skip:",n,depth);
- NEXT_OFF(scan) += NEXT_OFF(n);
- next = n + NODE_STEP_REGNODE;
-#ifdef DEBUGGING
- if (stringok)
- stop = n;
-#endif
- n = regnext(n);
- }
- else if (stringok) {
- const unsigned int oldl = STR_LEN(scan);
- regnode * const nnext = regnext(n);
-
- DEBUG_PEEP("merg",n,depth);
-
- merged++;
- if (oldl + STR_LEN(n) > U8_MAX)
- break;
- NEXT_OFF(scan) += NEXT_OFF(n);
- STR_LEN(scan) += STR_LEN(n);
- next = n + NODE_SZ_STR(n);
- /* Now we can overwrite *n : */
- Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char);
-#ifdef DEBUGGING
- stop = next - 1;
-#endif
- n = nnext;
- if (stopnow) break;
- }
-
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (flags && !NEXT_OFF(n)) {
- DEBUG_PEEP("atch", val, depth);
- if (reg_off_by_arg[OP(n)]) {
- ARG_SET(n, val - n);
- }
- else {
- NEXT_OFF(n) = val - n;
- }
- stopnow = 1;
- }
-#endif
- }
-
- if (UTF && ( OP(scan) == EXACTF ) && ( STR_LEN(scan) >= 6 ) ) {
- /*
- Two problematic code points in Unicode casefolding of EXACT nodes:
-
- U+0390 - GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS
- U+03B0 - GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS
-
- which casefold to
-
- Unicode UTF-8
-
- U+03B9 U+0308 U+0301 0xCE 0xB9 0xCC 0x88 0xCC 0x81
- U+03C5 U+0308 U+0301 0xCF 0x85 0xCC 0x88 0xCC 0x81
-
- This means that in case-insensitive matching (or "loose matching",
- as Unicode calls it), an EXACTF of length six (the UTF-8 encoded byte
- length of the above casefolded versions) can match a target string
- of length two (the byte length of UTF-8 encoded U+0390 or U+03B0).
- This would rather mess up the minimum length computation.
-
- What we'll do is to look for the tail four bytes, and then peek
- at the preceding two bytes to see whether we need to decrease
- the minimum length by four (six minus two).
-
- Thanks to the design of UTF-8, there cannot be false matches:
- A sequence of valid UTF-8 bytes cannot be a subsequence of
- another valid sequence of UTF-8 bytes.
-
- */
- char * const s0 = STRING(scan), *s, *t;
- char * const s1 = s0 + STR_LEN(scan) - 1;
- char * const s2 = s1 - 4;
-#ifdef EBCDIC /* RD tunifold greek 0390 and 03B0 */
- const char t0[] = "\xaf\x49\xaf\x42";
-#else
- const char t0[] = "\xcc\x88\xcc\x81";
-#endif
- const char * const t1 = t0 + 3;
-
- for (s = s0 + 2;
- s < s2 && (t = ninstr(s, s1, t0, t1));
- s = t + 4) {
-#ifdef EBCDIC
- if (((U8)t[-1] == 0x68 && (U8)t[-2] == 0xB4) ||
- ((U8)t[-1] == 0x46 && (U8)t[-2] == 0xB5))
-#else
- if (((U8)t[-1] == 0xB9 && (U8)t[-2] == 0xCE) ||
- ((U8)t[-1] == 0x85 && (U8)t[-2] == 0xCF))
-#endif
- *min -= 4;
- }
- }
-
-#ifdef DEBUGGING
- /* Allow dumping */
- n = scan + NODE_SZ_STR(scan);
- while (n <= stop) {
- if (PL_regkind[OP(n)] != NOTHING || OP(n) == NOTHING) {
- OP(n) = OPTIMIZED;
- NEXT_OFF(n) = 0;
- }
- n++;
- }
-#endif
- DEBUG_OPTIMISE_r(if (merged){DEBUG_PEEP("finl",scan,depth)});
- return stopnow;
-}
-
-/* REx optimizer. Converts nodes into quickier variants "in place".
- Finds fixed substrings. */
-
-/* Stops at toplevel WHILEM as well as at "last". At end *scanp is set
- to the position after last scanned or to NULL. */
-
-#define INIT_AND_WITHP \
- assert(!and_withp); \
- Newx(and_withp,1,struct regnode_charclass_class); \
- SAVEFREEPV(and_withp)
-
-/* this is a chain of data about sub patterns we are processing that
- need to be handled seperately/specially in study_chunk. Its so
- we can simulate recursion without losing state. */
-struct scan_frame;
-typedef struct scan_frame {
- regnode *last; /* last node to process in this frame */
- regnode *next; /* next node to process when last is reached */
- struct scan_frame *prev; /*previous frame*/
- I32 stop; /* what stopparen do we use */
-} scan_frame;
-
-
-#define SCAN_COMMIT(s, data, m) scan_commit(s, data, m, is_inf)
-
-#define CASE_SYNST_FNC(nAmE) \
-case nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break; \
-case N ## nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break
-
-
-
-STATIC I32
-S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp,
- I32 *minlenp, I32 *deltap,
- regnode *last,
- scan_data_t *data,
- I32 stopparen,
- U8* recursed,
- struct regnode_charclass_class *and_withp,
- U32 flags, U32 depth)
- /* scanp: Start here (read-write). */
- /* deltap: Write maxlen-minlen here. */
- /* last: Stop before this one. */
- /* data: string data about the pattern */
- /* stopparen: treat close N as END */
- /* recursed: which subroutines have we recursed into */
- /* and_withp: Valid if flags & SCF_DO_STCLASS_OR */
-{
- dVAR;
- I32 min = 0, pars = 0, code;
- regnode *scan = *scanp, *next;
- I32 delta = 0;
- int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF);
- int is_inf_internal = 0; /* The studied chunk is infinite */
- I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0;
- scan_data_t data_fake;
- SV *re_trie_maxbuff = NULL;
- regnode *first_non_open = scan;
- I32 stopmin = I32_MAX;
- scan_frame *frame = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_STUDY_CHUNK;
-
-#ifdef DEBUGGING
- StructCopy(&zero_scan_data, &data_fake, scan_data_t);
-#endif
-
- if ( depth == 0 ) {
- while (first_non_open && OP(first_non_open) == OPEN)
- first_non_open=regnext(first_non_open);
- }
-
-
- fake_study_recurse:
- while ( scan && OP(scan) != END && scan < last ){
- /* Peephole optimizer: */
- DEBUG_STUDYDATA("Peep:", data,depth);
- DEBUG_PEEP("Peep",scan,depth);
- JOIN_EXACT(scan,&min,0);
-
- /* Follow the next-chain of the current node and optimize
- away all the NOTHINGs from it. */
- if (OP(scan) != CURLYX) {
- const int max = (reg_off_by_arg[OP(scan)]
- ? I32_MAX
- /* I32 may be smaller than U16 on CRAYs! */
- : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX));
- int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan));
- int noff;
- regnode *n = scan;
-
- /* Skip NOTHING and LONGJMP. */
- while ((n = regnext(n))
- && ((PL_regkind[OP(n)] == NOTHING && (noff = NEXT_OFF(n)))
- || ((OP(n) == LONGJMP) && (noff = ARG(n))))
- && off + noff < max)
- off += noff;
- if (reg_off_by_arg[OP(scan)])
- ARG(scan) = off;
- else
- NEXT_OFF(scan) = off;
- }
-
-
-
- /* The principal pseudo-switch. Cannot be a switch, since we
- look into several different things. */
- if (OP(scan) == BRANCH || OP(scan) == BRANCHJ
- || OP(scan) == IFTHEN) {
- next = regnext(scan);
- code = OP(scan);
- /* demq: the op(next)==code check is to see if we have "branch-branch" AFAICT */
-
- if (OP(next) == code || code == IFTHEN) {
- /* NOTE - There is similar code to this block below for handling
- TRIE nodes on a re-study. If you change stuff here check there
- too. */
- I32 max1 = 0, min1 = I32_MAX, num = 0;
- struct regnode_charclass_class accum;
- regnode * const startbranch=scan;
-
- if (flags & SCF_DO_SUBSTR)
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- while (OP(scan) == code) {
- I32 deltanext, minnext, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- num++;
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
-
- data_fake.pos_delta = delta;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- if (code != BRANCH)
- scan = NEXTOPER(scan);
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- /* we suppose the run is continuous, last=next...*/
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- next, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- if (min1 > minnext)
- min1 = minnext;
- if (max1 < minnext + deltanext)
- max1 = minnext + deltanext;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
- scan = next;
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > minnext)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- if (code == IFTHEN && num < 2) /* Empty ELSE branch */
- min1 = 0;
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
-
- if (PERL_ENABLE_TRIE_OPTIMISATION && OP( startbranch ) == BRANCH ) {
- /* demq.
-
- Assuming this was/is a branch we are dealing with: 'scan' now
- points at the item that follows the branch sequence, whatever
- it is. We now start at the beginning of the sequence and look
- for subsequences of
-
- BRANCH->EXACT=>x1
- BRANCH->EXACT=>x2
- tail
-
- which would be constructed from a pattern like /A|LIST|OF|WORDS/
-
- If we can find such a subseqence we need to turn the first
- element into a trie and then add the subsequent branch exact
- strings to the trie.
-
- We have two cases
-
- 1. patterns where the whole set of branch can be converted.
-
- 2. patterns where only a subset can be converted.
-
- In case 1 we can replace the whole set with a single regop
- for the trie. In case 2 we need to keep the start and end
- branchs so
-
- 'BRANCH EXACT; BRANCH EXACT; BRANCH X'
- becomes BRANCH TRIE; BRANCH X;
-
- There is an additional case, that being where there is a
- common prefix, which gets split out into an EXACT like node
- preceding the TRIE node.
-
- If x(1..n)==tail then we can do a simple trie, if not we make
- a "jump" trie, such that when we match the appropriate word
- we "jump" to the appopriate tail node. Essentailly we turn
- a nested if into a case structure of sorts.
-
- */
-
- int made=0;
- if (!re_trie_maxbuff) {
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff))
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- if ( SvIV(re_trie_maxbuff)>=0 ) {
- regnode *cur;
- regnode *first = (regnode *)NULL;
- regnode *last = (regnode *)NULL;
- regnode *tail = scan;
- U8 optype = 0;
- U32 count=0;
-
-#ifdef DEBUGGING
- SV * const mysv = sv_newmortal(); /* for dumping */
-#endif
- /* var tail is used because there may be a TAIL
- regop in the way. Ie, the exacts will point to the
- thing following the TAIL, but the last branch will
- point at the TAIL. So we advance tail. If we
- have nested (?:) we may have to move through several
- tails.
- */
-
- while ( OP( tail ) == TAIL ) {
- /* this is the TAIL generated by (?:) */
- tail = regnext( tail );
- }
-
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, tail );
- PerlIO_printf( Perl_debug_log, "%*s%s%s\n",
- (int)depth * 2 + 2, "",
- "Looking for TRIE'able sequences. Tail node is: ",
- SvPV_nolen_const( mysv )
- );
- });
-
- /*
-
- step through the branches, cur represents each
- branch, noper is the first thing to be matched
- as part of that branch and noper_next is the
- regnext() of that node. if noper is an EXACT
- and noper_next is the same as scan (our current
- position in the regex) then the EXACT branch is
- a possible optimization target. Once we have
- two or more consequetive such branches we can
- create a trie of the EXACT's contents and stich
- it in place. If the sequence represents all of
- the branches we eliminate the whole thing and
- replace it with a single TRIE. If it is a
- subsequence then we need to stitch it in. This
- means the first branch has to remain, and needs
- to be repointed at the item on the branch chain
- following the last branch optimized. This could
- be either a BRANCH, in which case the
- subsequence is internal, or it could be the
- item following the branch sequence in which
- case the subsequence is at the end.
-
- */
-
- /* dont use tail as the end marker for this traverse */
- for ( cur = startbranch ; cur != scan ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
-#if defined(DEBUGGING) || defined(NOJUMPTRIE)
- regnode * const noper_next = regnext( noper );
-#endif
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log, "%*s- %s (%d)",
- (int)depth * 2 + 2,"", SvPV_nolen_const( mysv ), REG_NODE_NUM(cur) );
-
- regprop(RExC_rx, mysv, noper);
- PerlIO_printf( Perl_debug_log, " -> %s",
- SvPV_nolen_const(mysv));
-
- if ( noper_next ) {
- regprop(RExC_rx, mysv, noper_next );
- PerlIO_printf( Perl_debug_log,"\t=> %s\t",
- SvPV_nolen_const(mysv));
- }
- PerlIO_printf( Perl_debug_log, "(First==%d,Last==%d,Cur==%d)\n",
- REG_NODE_NUM(first), REG_NODE_NUM(last), REG_NODE_NUM(cur) );
- });
- if ( (((first && optype!=NOTHING) ? OP( noper ) == optype
- : PL_regkind[ OP( noper ) ] == EXACT )
- || OP(noper) == NOTHING )
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- && count < U16_MAX)
- {
- count++;
- if ( !first || optype == NOTHING ) {
- if (!first) first = cur;
- optype = OP( noper );
- } else {
- last = cur;
- }
- } else {
-/*
- Currently we do not believe that the trie logic can
- handle case insensitive matching properly when the
- pattern is not unicode (thus forcing unicode semantics).
-
- If/when this is fixed the following define can be swapped
- in below to fully enable trie logic.
-
-#define TRIE_TYPE_IS_SAFE 1
-
-*/
-#define TRIE_TYPE_IS_SAFE (UTF || optype==EXACT)
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- make_trie( pRExC_state,
- startbranch, first, cur, tail, count,
- optype, depth+1 );
- }
- if ( PL_regkind[ OP( noper ) ] == EXACT
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- ){
- count = 1;
- first = cur;
- optype = OP( noper );
- } else {
- count = 0;
- first = NULL;
- optype = 0;
- }
- last = NULL;
- }
- }
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log,
- "%*s- %s (%d) <SCAN FINISHED>\n", (int)depth * 2 + 2,
- "", SvPV_nolen_const( mysv ),REG_NODE_NUM(cur));
-
- });
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- made= make_trie( pRExC_state, startbranch, first, scan, tail, count, optype, depth+1 );
-#ifdef TRIE_STUDY_OPT
- if ( ((made == MADE_EXACT_TRIE &&
- startbranch == first)
- || ( first_non_open == first )) &&
- depth==0 ) {
- flags |= SCF_TRIE_RESTUDY;
- if ( startbranch == first
- && scan == tail )
- {
- RExC_seen &=~REG_TOP_LEVEL_BRANCHES;
- }
- }
-#endif
- }
- }
-
- } /* do trie */
-
- }
- else if ( code == BRANCHJ ) { /* single branch is optimized. */
- scan = NEXTOPER(NEXTOPER(scan));
- } else /* single branch is optimized. */
- scan = NEXTOPER(scan);
- continue;
- } else if (OP(scan) == SUSPEND || OP(scan) == GOSUB || OP(scan) == GOSTART) {
- scan_frame *newframe = NULL;
- I32 paren;
- regnode *start;
- regnode *end;
-
- if (OP(scan) != SUSPEND) {
- /* set the pointer */
- if (OP(scan) == GOSUB) {
- paren = ARG(scan);
- RExC_recurse[ARG2L(scan)] = scan;
- start = RExC_open_parens[paren-1];
- end = RExC_close_parens[paren-1];
- } else {
- paren = 0;
- start = RExC_rxi->program + 1;
- end = RExC_opend;
- }
- if (!recursed) {
- Newxz(recursed, (((RExC_npar)>>3) +1), U8);
- SAVEFREEPV(recursed);
- }
- if (!PAREN_TEST(recursed,paren+1)) {
- PAREN_SET(recursed,paren+1);
- Newx(newframe,1,scan_frame);
- } else {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- } else {
- Newx(newframe,1,scan_frame);
- paren = stopparen;
- start = scan+2;
- end = regnext(scan);
- }
- if (newframe) {
- assert(start);
- assert(end);
- SAVEFREEPV(newframe);
- newframe->next = regnext(scan);
- newframe->last = last;
- newframe->stop = stopparen;
- newframe->prev = frame;
-
- frame = newframe;
- scan = start;
- stopparen = paren;
- last = end;
-
- continue;
- }
- }
- else if (OP(scan) == EXACT) {
- I32 l = STR_LEN(scan);
- UV uc;
- if (UTF) {
- const U8 * const s = (U8*)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- } else {
- uc = *((U8*)STRING(scan));
- }
- min += l;
- if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */
- /* The code below prefers earlier match for fixed
- offset, later match for variable offset. */
- if (data->last_end == -1) { /* Update the start info. */
- data->last_start_min = data->pos_min;
- data->last_start_max = is_inf
- ? I32_MAX : data->pos_min + data->pos_delta;
- }
- sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan));
- if (UTF)
- SvUTF8_on(data->last_found);
- {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += utf8_length((U8*)STRING(scan),
- (U8*)STRING(scan)+STR_LEN(scan));
- }
- data->last_end = data->pos_min + l;
- data->pos_min += l; /* As in the first entry. */
- data->flags &= ~SF_BEFORE_EOL;
- }
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && (!(data->start_class->flags & ANYOF_FOLD)
- || !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- )
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- if (uc < 0x100)
- data->start_class->flags &= ~ANYOF_UNICODE_ALL;
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- /* false positive possible if the class is case-folded */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- else
- data->start_class->flags |= ANYOF_UNICODE_ALL;
- data->start_class->flags &= ~ANYOF_EOS;
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (PL_regkind[OP(scan)] == EXACT) { /* But OP != EXACT! */
- I32 l = STR_LEN(scan);
- UV uc = *((U8*)STRING(scan));
-
- /* Search for fixed substrings supports EXACT only. */
- if (flags & SCF_DO_SUBSTR) {
- assert(data);
- SCAN_COMMIT(pRExC_state, data, minlenp);
- }
- if (UTF) {
- const U8 * const s = (U8 *)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- }
- min += l;
- if (flags & SCF_DO_SUBSTR)
- data->pos_min += l;
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat) {
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- data->start_class->flags |= ANYOF_FOLD;
- if (OP(scan) == EXACTFL)
- data->start_class->flags |= ANYOF_LOCALE;
- }
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- if (data->start_class->flags & ANYOF_FOLD) {
- /* false positive possible if the class is case-folded.
- Assume that the locale settings are the same... */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- }
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (strchr((const char*)PL_varies,OP(scan))) {
- I32 mincount, maxcount, minnext, deltanext, fl = 0;
- I32 f = flags, pos_before = 0;
- regnode * const oscan = scan;
- struct regnode_charclass_class this_class;
- struct regnode_charclass_class *oclass = NULL;
- I32 next_is_eval = 0;
-
- switch (PL_regkind[OP(scan)]) {
- case WHILEM: /* End of (?:...)* . */
- scan = NEXTOPER(scan);
- goto finish;
- case PLUS:
- if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) {
- next = NEXTOPER(scan);
- if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) {
- mincount = 1;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- }
- if (flags & SCF_DO_SUBSTR)
- data->pos_min++;
- min++;
- /* Fall through. */
- case STAR:
- if (flags & SCF_DO_STCLASS) {
- mincount = 0;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- is_inf = is_inf_internal = 1;
- scan = regnext(scan);
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot extend fixed substrings */
- data->longest = &(data->longest_float);
- }
- goto optimize_curly_tail;
- case CURLY:
- if (stopparen>0 && (OP(scan)==CURLYN || OP(scan)==CURLYM)
- && (scan->flags == stopparen))
- {
- mincount = 1;
- maxcount = 1;
- } else {
- mincount = ARG1(scan);
- maxcount = ARG2(scan);
- }
- next = regnext(scan);
- if (OP(scan) == CURLYX) {
- I32 lp = (data ? *(data->last_closep) : 0);
- scan->flags = ((lp <= (I32)U8_MAX) ? (U8)lp : U8_MAX);
- }
- scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- next_is_eval = (OP(scan) == EVAL);
- do_curly:
- if (flags & SCF_DO_SUBSTR) {
- if (mincount == 0) SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot extend fixed substrings */
- pos_before = data->pos_min;
- }
- if (data) {
- fl = data->flags;
- data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL);
- if (is_inf)
- data->flags |= SF_IS_INF;
- }
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- oclass = data->start_class;
- data->start_class = &this_class;
- f |= SCF_DO_STCLASS_AND;
- f &= ~SCF_DO_STCLASS_OR;
- }
- /* These are the cases when once a subexpression
- fails at a particular position, it cannot succeed
- even after backtracking at the enclosing scope.
-
- XXXX what if minimal match and we are at the
- initial run of {n,m}? */
- if ((mincount != maxcount - 1) && (maxcount != REG_INFTY))
- f &= ~SCF_WHILEM_VISITED_POS;
-
- /* This will finish on WHILEM, setting scan, or on NULL: */
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- last, data, stopparen, recursed, NULL,
- (mincount == 0
- ? (f & ~SCF_DO_SUBSTR) : f),depth+1);
-
- if (flags & SCF_DO_STCLASS)
- data->start_class = oclass;
- if (mincount == 0 || minnext == 0) {
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&this_class, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- } else { /* Non-zero len */
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- cl_and(data->start_class, and_withp);
- }
- else if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class, &this_class);
- flags &= ~SCF_DO_STCLASS;
- }
- if (!scan) /* It was not CURLYX, but CURLY. */
- scan = next;
- if ( /* ? quantifier ok, except for (?{ ... }) */
- (next_is_eval || !(mincount == 0 && maxcount == 1))
- && (minnext == 0) && (deltanext == 0)
- && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR))
- && maxcount <= REG_INFTY/3) /* Complement check for big count */
- {
- ckWARNreg(RExC_parse,
- "Quantifier unexpected on zero-length expression");
- }
-
- min += minnext * mincount;
- is_inf_internal |= ((maxcount == REG_INFTY
- && (minnext + deltanext) > 0)
- || deltanext == I32_MAX);
- is_inf |= is_inf_internal;
- delta += (minnext + deltanext) * maxcount - minnext * mincount;
-
- /* Try powerful optimization CURLYX => CURLYN. */
- if ( OP(oscan) == CURLYX && data
- && data->flags & SF_IN_PAR
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext && minnext == 1 ) {
- /* Try to optimize to CURLYN. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS;
- regnode * const nxt1 = nxt;
-#ifdef DEBUGGING
- regnode *nxt2;
-#endif
-
- /* Skip open. */
- nxt = regnext(nxt);
- if (!strchr((const char*)PL_simple,OP(nxt))
- && !(PL_regkind[OP(nxt)] == EXACT
- && STR_LEN(nxt) == 1))
- goto nogo;
-#ifdef DEBUGGING
- nxt2 = nxt;
-#endif
- nxt = regnext(nxt);
- if (OP(nxt) != CLOSE)
- goto nogo;
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt+2; /*close->while*/
- }
- /* Now we know that nxt2 is the only contents: */
- oscan->flags = (U8)ARG(nxt);
- OP(oscan) = CURLYN;
- OP(nxt1) = NOTHING; /* was OPEN. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */
-#endif
- }
- nogo:
-
- /* Try optimization CURLYX => CURLYM. */
- if ( OP(oscan) == CURLYX && data
- && !(data->flags & SF_HAS_PAR)
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext /* atom is fixed width */
- && minnext != 0 /* CURLYM can't handle zero width */
- ) {
- /* XXXX How to optimize if data == 0? */
- /* Optimize to a simpler form. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */
- regnode *nxt2;
-
- OP(oscan) = CURLYM;
- while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/
- && (OP(nxt2) != WHILEM))
- nxt = nxt2;
- OP(nxt2) = SUCCEED; /* Whas WHILEM */
- /* Need to optimize away parenths. */
- if (data->flags & SF_IN_PAR) {
- /* Set the parenth number. */
- regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/
-
- if (OP(nxt) != CLOSE)
- FAIL("Panic opt close");
- oscan->flags = (U8)ARG(nxt);
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt2+1; /*close->NOTHING*/
- }
- OP(nxt1) = OPTIMIZED; /* was OPEN. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */
-#endif
-#if 0
- while ( nxt1 && (OP(nxt1) != WHILEM)) {
- regnode *nnxt = regnext(nxt1);
-
- if (nnxt == nxt) {
- if (reg_off_by_arg[OP(nxt1)])
- ARG_SET(nxt1, nxt2 - nxt1);
- else if (nxt2 - nxt1 < U16_MAX)
- NEXT_OFF(nxt1) = nxt2 - nxt1;
- else
- OP(nxt) = NOTHING; /* Cannot beautify */
- }
- nxt1 = nnxt;
- }
-#endif
- /* Optimize again: */
- study_chunk(pRExC_state, &nxt1, minlenp, &deltanext, nxt,
- NULL, stopparen, recursed, NULL, 0,depth+1);
- }
- else
- oscan->flags = 0;
- }
- else if ((OP(oscan) == CURLYX)
- && (flags & SCF_WHILEM_VISITED_POS)
- /* See the comment on a similar expression above.
- However, this time it not a subexpression
- we care about, but the expression itself. */
- && (maxcount == REG_INFTY)
- && data && ++data->whilem_c < 16) {
- /* This stays as CURLYX, we can put the count/of pair. */
- /* Find WHILEM (as in regexec.c) */
- regnode *nxt = oscan + NEXT_OFF(oscan);
-
- if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */
- nxt += ARG(nxt);
- PREVOPER(nxt)->flags = (U8)(data->whilem_c
- | (RExC_whilem_seen << 4)); /* On WHILEM */
- }
- if (data && fl & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (flags & SCF_DO_SUBSTR) {
- SV *last_str = NULL;
- int counted = mincount != 0;
-
- if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */
-#if defined(SPARC64_GCC_WORKAROUND)
- I32 b = 0;
- STRLEN l = 0;
- const char *s = NULL;
- I32 old = 0;
-
- if (pos_before >= data->last_start_min)
- b = pos_before;
- else
- b = data->last_start_min;
-
- l = 0;
- s = SvPV_const(data->last_found, l);
- old = b - data->last_start_min;
-
-#else
- I32 b = pos_before >= data->last_start_min
- ? pos_before : data->last_start_min;
- STRLEN l;
- const char * const s = SvPV_const(data->last_found, l);
- I32 old = b - data->last_start_min;
-#endif
-
- if (UTF)
- old = utf8_hop((U8*)s, old) - (U8*)s;
-
- l -= old;
- /* Get the added string: */
- last_str = newSVpvn_utf8(s + old, l, UTF);
- if (deltanext == 0 && pos_before == b) {
- /* What was added is a constant string */
- if (mincount > 1) {
- SvGROW(last_str, (mincount * l) + 1);
- repeatcpy(SvPVX(last_str) + l,
- SvPVX_const(last_str), l, mincount - 1);
- SvCUR_set(last_str, SvCUR(last_str) * mincount);
- /* Add additional parts. */
- SvCUR_set(data->last_found,
- SvCUR(data->last_found) - l);
- sv_catsv(data->last_found, last_str);
- {
- SV * sv = data->last_found;
- MAGIC *mg =
- SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += CHR_SVLEN(last_str) - l;
- }
- data->last_end += l * (mincount - 1);
- }
- } else {
- /* start offset must point into the last copy */
- data->last_start_min += minnext * (mincount - 1);
- data->last_start_max += is_inf ? I32_MAX
- : (maxcount - 1) * (minnext + data->pos_delta);
- }
- }
- /* It is counted once already... */
- data->pos_min += minnext * (mincount - counted);
- data->pos_delta += - counted * deltanext +
- (minnext + deltanext) * maxcount - minnext * mincount;
- if (mincount != maxcount) {
- /* Cannot extend fixed substrings found inside
- the group. */
- SCAN_COMMIT(pRExC_state,data,minlenp);
- if (mincount && last_str) {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
-
- if (mg)
- mg->mg_len = -1;
- sv_setsv(sv, last_str);
- data->last_end = data->pos_min;
- data->last_start_min =
- data->pos_min - CHR_SVLEN(last_str);
- data->last_start_max = is_inf
- ? I32_MAX
- : data->pos_min + data->pos_delta
- - CHR_SVLEN(last_str);
- }
- data->longest = &(data->longest_float);
- }
- SvREFCNT_dec(last_str);
- }
- if (data && (fl & SF_HAS_EVAL))
- data->flags |= SF_HAS_EVAL;
- optimize_curly_tail:
- if (OP(oscan) != CURLYX) {
- while (PL_regkind[OP(next = regnext(oscan))] == NOTHING
- && NEXT_OFF(next))
- NEXT_OFF(oscan) += NEXT_OFF(next);
- }
- continue;
- default: /* REF and CLUMP only? */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR)
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- break;
- }
- }
- else if (OP(scan) == LNBREAK) {
- if (flags & SCF_DO_STCLASS) {
- int value = 0;
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
- if (flags & SCF_DO_STCLASS_AND) {
- for (value = 0; value < 256; value++)
- if (!is_VERTWS_cp(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- for (value = 0; value < 256; value++)
- if (is_VERTWS_cp(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- min += 1;
- delta += 1;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += 1;
- data->longest = &(data->longest_float);
- }
-
- }
- else if (OP(scan) == FOLDCHAR) {
- int d = ARG(scan)==0xDF ? 1 : 2;
- flags &= ~SCF_DO_STCLASS;
- min += 1;
- delta += d;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += d;
- data->longest = &(data->longest_float);
- }
- }
- else if (strchr((const char*)PL_simple,OP(scan))) {
- int value = 0;
-
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->pos_min++;
- }
- min++;
- if (flags & SCF_DO_STCLASS) {
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
-
- /* Some of the logic below assumes that switching
- locale on will only add false positives. */
- switch (PL_regkind[OP(scan)]) {
- case SANY:
- default:
- do_default:
- /* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- break;
- case REG_ANY:
- if (OP(scan) == SANY)
- goto do_default;
- if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */
- value = (ANYOF_BITMAP_TEST(data->start_class,'\n')
- || (data->start_class->flags & ANYOF_CLASS));
- cl_anything(pRExC_state, data->start_class);
- }
- if (flags & SCF_DO_STCLASS_AND || !value)
- ANYOF_BITMAP_CLEAR(data->start_class,'\n');
- break;
- case ANYOF:
- if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class,
- (struct regnode_charclass_class*)scan);
- else
- cl_or(pRExC_state, data->start_class,
- (struct regnode_charclass_class*)scan);
- break;
- case ALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case ALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- }
- else {
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- data->start_class->flags |= ANYOF_LOCALE;
- }
- break;
- case NALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- }
- break;
- case SPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- else {
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case SPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- }
- break;
- case NSPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- else {
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NSPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- }
- break;
- case DIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT);
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NDIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT);
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- CASE_SYNST_FNC(VERTWS);
- CASE_SYNST_FNC(HORIZWS);
-
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (PL_regkind[OP(scan)] == EOL && flags & SCF_DO_SUBSTR) {
- data->flags |= (OP(scan) == MEOL
- ? SF_BEFORE_MEOL
- : SF_BEFORE_SEOL);
- }
- else if ( PL_regkind[OP(scan)] == BRANCHJ
- /* Lookbehind, or need to calculate parens/evals/stclass: */
- && (scan->flags || data || (flags & SCF_DO_STCLASS))
- && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) {
- if ( !PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- || OP(scan) == UNLESSM )
- {
- /* Negative Lookahead/lookbehind
- In this case we can't do fixed string optimisation.
- */
-
- I32 deltanext, minnext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
- minnext = study_chunk(pRExC_state, &nscan, minlenp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f, depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (minnext > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)minnext;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (f & SCF_DO_STCLASS_AND) {
- if (flags & SCF_DO_STCLASS_OR) {
- /* OR before, AND after: ideally we would recurse with
- * data_fake to get the AND applied by study of the
- * remainder of the pattern, and then derecurse;
- * *** HACK *** for now just treat as "no information".
- * See [perl #56690].
- */
- cl_init(pRExC_state, data->start_class);
- } else {
- /* AND before and after: combine and continue */
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- }
-#if PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- else {
- /* Positive Lookahead/lookbehind
- In this case we can do fixed string optimisation,
- but we must be careful about it. Note in the case of
- lookbehind the positions will be offset by the minimum
- length of the pattern, something we won't know about
- until after the recurse.
- */
- I32 deltanext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
- /* We use SAVEFREEPV so that when the full compile
- is finished perl will clean up the allocated
- minlens when its all done. This was we don't
- have to worry about freeing them when we know
- they wont be used, which would be a pain.
- */
- I32 *minnextp;
- Newx( minnextp, 1, I32 );
- SAVEFREEPV(minnextp);
-
- if (data) {
- StructCopy(data, &data_fake, scan_data_t);
- if ((flags & SCF_DO_SUBSTR) && data->last_found) {
- f |= SCF_DO_SUBSTR;
- if (scan->flags)
- SCAN_COMMIT(pRExC_state, &data_fake,minlenp);
- data_fake.last_found=newSVsv(data->last_found);
- }
- }
- else
- data_fake.last_closep = &fake;
- data_fake.flags = 0;
- data_fake.pos_delta = delta;
- if (is_inf)
- data_fake.flags |= SF_IS_INF;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
-
- *minnextp = study_chunk(pRExC_state, &nscan, minnextp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f,depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (*minnextp > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)*minnextp;
- }
-
- *minnextp += min;
-
- if (f & SCF_DO_STCLASS_AND) {
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- if ((flags & SCF_DO_SUBSTR) && data_fake.last_found) {
- if (RExC_rx->minlen<*minnextp)
- RExC_rx->minlen=*minnextp;
- SCAN_COMMIT(pRExC_state, &data_fake, minnextp);
- SvREFCNT_dec(data_fake.last_found);
-
- if ( data_fake.minlen_fixed != minlenp )
- {
- data->offset_fixed= data_fake.offset_fixed;
- data->minlen_fixed= data_fake.minlen_fixed;
- data->lookbehind_fixed+= scan->flags;
- }
- if ( data_fake.minlen_float != minlenp )
- {
- data->minlen_float= data_fake.minlen_float;
- data->offset_float_min=data_fake.offset_float_min;
- data->offset_float_max=data_fake.offset_float_max;
- data->lookbehind_float+= scan->flags;
- }
- }
- }
-
-
- }
-#endif
- }
- else if (OP(scan) == OPEN) {
- if (stopparen != (I32)ARG(scan))
- pars++;
- }
- else if (OP(scan) == CLOSE) {
- if (stopparen == (I32)ARG(scan)) {
- break;
- }
- if ((I32)ARG(scan) == is_par) {
- next = regnext(scan);
-
- if ( next && (OP(next) != WHILEM) && next < last)
- is_par = 0; /* Disable optimization */
- }
- if (data)
- *(data->last_closep) = ARG(scan);
- }
- else if (OP(scan) == EVAL) {
- if (data)
- data->flags |= SF_HAS_EVAL;
- }
- else if ( PL_regkind[OP(scan)] == ENDLIKE ) {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- flags &= ~SCF_DO_SUBSTR;
- }
- if (data && OP(scan)==ACCEPT) {
- data->flags |= SCF_SEEN_ACCEPT;
- if (stopmin > min)
- stopmin = min;
- }
- }
- else if (OP(scan) == LOGICAL && scan->flags == 2) /* Embedded follows */
- {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- else if (OP(scan) == GPOS) {
- if (!(RExC_rx->extflags & RXf_GPOS_FLOAT) &&
- !(delta || is_inf || (data && data->pos_delta)))
- {
- if (!(RExC_rx->extflags & RXf_ANCH) && (flags & SCF_DO_SUBSTR))
- RExC_rx->extflags |= RXf_ANCH_GPOS;
- if (RExC_rx->gofs < (U32)min)
- RExC_rx->gofs = min;
- } else {
- RExC_rx->extflags |= RXf_GPOS_FLOAT;
- RExC_rx->gofs = 0;
- }
- }
-#ifdef TRIE_STUDY_OPT
-#ifdef FULL_TRIE_STUDY
- else if (PL_regkind[OP(scan)] == TRIE) {
- /* NOTE - There is similar code to this block above for handling
- BRANCH nodes on the initial study. If you change stuff here
- check there too. */
- regnode *trie_node= scan;
- regnode *tail= regnext(scan);
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- I32 max1 = 0, min1 = I32_MAX;
- struct regnode_charclass_class accum;
-
- if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */
- SCAN_COMMIT(pRExC_state, data,minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- if (!trie->jump) {
- min1= trie->minlen;
- max1= trie->maxlen;
- } else {
- const regnode *nextbranch= NULL;
- U32 word;
-
- for ( word=1 ; word <= trie->wordcount ; word++)
- {
- I32 deltanext=0, minnext=0, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- if (trie->jump[word]) {
- if (!nextbranch)
- nextbranch = trie_node + trie->jump[0];
- scan= trie_node + trie->jump[word];
- /* We go from the jump point to the branch that follows
- it. Note this means we need the vestigal unused branches
- even though they arent otherwise used.
- */
- minnext = study_chunk(pRExC_state, &scan, minlenp,
- &deltanext, (regnode *)nextbranch, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode*)nextbranch);
-
- if (min1 > (I32)(minnext + trie->minlen))
- min1 = minnext + trie->minlen;
- if (max1 < (I32)(minnext + deltanext + trie->maxlen))
- max1 = minnext + deltanext + trie->maxlen;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
-
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > min + min1)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- }
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- scan= tail;
- continue;
- }
-#else
- else if (PL_regkind[OP(scan)] == TRIE) {
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- U8*bang=NULL;
-
- min += trie->minlen;
- delta += (trie->maxlen - trie->minlen);
- flags &= ~SCF_DO_STCLASS; /* xxx */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += trie->minlen;
- data->pos_delta += (trie->maxlen - trie->minlen);
- if (trie->maxlen != trie->minlen)
- data->longest = &(data->longest_float);
- }
- if (trie->jump) /* no more substrings -- for now /grr*/
- flags &= ~SCF_DO_SUBSTR;
- }
-#endif /* old or new */
-#endif /* TRIE_STUDY_OPT */
-
- /* Else: zero-length, ignore. */
- scan = regnext(scan);
- }
- if (frame) {
- last = frame->last;
- scan = frame->next;
- stopparen = frame->stop;
- frame = frame->prev;
- goto fake_study_recurse;
- }
-
- finish:
- assert(!frame);
- DEBUG_STUDYDATA("pre-fin:",data,depth);
-
- *scanp = scan;
- *deltap = is_inf_internal ? I32_MAX : delta;
- if (flags & SCF_DO_SUBSTR && is_inf)
- data->pos_delta = I32_MAX - data->pos_min;
- if (is_par > (I32)U8_MAX)
- is_par = 0;
- if (is_par && pars==1 && data) {
- data->flags |= SF_IN_PAR;
- data->flags &= ~SF_HAS_PAR;
- }
- else if (pars && data) {
- data->flags |= SF_HAS_PAR;
- data->flags &= ~SF_IN_PAR;
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- if (flags & SCF_TRIE_RESTUDY)
- data->flags |= SCF_TRIE_RESTUDY;
-
- DEBUG_STUDYDATA("post-fin:",data,depth);
-
- return min < stopmin ? min : stopmin;
-}
-
-STATIC U32
-S_add_data(RExC_state_t *pRExC_state, U32 n, const char *s)
-{
- U32 count = RExC_rxi->data ? RExC_rxi->data->count : 0;
-
- PERL_ARGS_ASSERT_ADD_DATA;
-
- Renewc(RExC_rxi->data,
- sizeof(*RExC_rxi->data) + sizeof(void*) * (count + n - 1),
- char, struct reg_data);
- if(count)
- Renew(RExC_rxi->data->what, count + n, U8);
- else
- Newx(RExC_rxi->data->what, n, U8);
- RExC_rxi->data->count = count + n;
- Copy(s, RExC_rxi->data->what + count, n, U8);
- return count;
-}
-
-/*XXX: todo make this not included in a non debugging perl */
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_reginitcolors(pTHX)
-{
- dVAR;
- const char * const s = PerlEnv_getenv("PERL_RE_COLORS");
- if (s) {
- char *t = savepv(s);
- int i = 0;
- PL_colors[0] = t;
- while (++i < 6) {
- t = strchr(t, '\t');
- if (t) {
- *t = '\0';
- PL_colors[i] = ++t;
- }
- else
- PL_colors[i] = t = (char *)"";
- }
- } else {
- int i = 0;
- while (i < 6)
- PL_colors[i++] = (char *)"";
- }
- PL_colorset = 1;
-}
-#endif
-
-
-#ifdef TRIE_STUDY_OPT
-#define CHECK_RESTUDY_GOTO \
- if ( \
- (data.flags & SCF_TRIE_RESTUDY) \
- && ! restudied++ \
- ) goto reStudy
-#else
-#define CHECK_RESTUDY_GOTO
-#endif
-
-/*
- - pregcomp - compile a regular expression into internal code
- *
- * We can't allocate space until we know how big the compiled form will be,
- * but we can't compile it (and thus know how big it is) until we've got a
- * place to put the code. So we cheat: we compile it twice, once with code
- * generation turned off and size counting turned on, and once "for real".
- * This also means that we don't allocate space until we are sure that the
- * thing really will compile successfully, and we never have to move the
- * code and thus invalidate pointers into it. (Note that it has to be in
- * one piece because free() must be able to free it all.) [NB: not true in perl]
- *
- * Beware that the optimization-preparation code in here knows about some
- * of the structure of the compiled regexp. [I'll say.]
- */
-
-
-
-#ifndef PERL_IN_XSUB_RE
-#define RE_ENGINE_PTR &PL_core_reg_engine
-#else
-extern const struct regexp_engine my_reg_engine;
-#define RE_ENGINE_PTR &my_reg_engine
-#endif
-
-#ifndef PERL_IN_XSUB_RE
-REGEXP *
-Perl_pregcomp(pTHX_ SV * const pattern, const U32 flags)
-{
- dVAR;
- HV * const table = GvHV(PL_hintgv);
-
- PERL_ARGS_ASSERT_PREGCOMP;
-
- /* Dispatch a request to compile a regexp to correct
- regexp engine. */
- if (table) {
- SV **ptr= hv_fetchs(table, "regcomp", FALSE);
- GET_RE_DEBUG_FLAGS_DECL;
- if (ptr && SvIOK(*ptr) && SvIV(*ptr)) {
- const regexp_engine *eng=INT2PTR(regexp_engine*,SvIV(*ptr));
- DEBUG_COMPILE_r({
- PerlIO_printf(Perl_debug_log, "Using engine %"UVxf"\n",
- SvIV(*ptr));
- });
- return CALLREGCOMP_ENG(eng, pattern, flags);
- }
- }
- return Perl_re_compile(aTHX_ pattern, flags);
-}
-#endif
-
-REGEXP *
-Perl_re_compile(pTHX_ SV * const pattern, U32 pm_flags)
-{
- dVAR;
- REGEXP *rx;
- struct regexp *r;
- register regexp_internal *ri;
- STRLEN plen;
- char *exp = SvPV(pattern, plen);
- char* xend = exp + plen;
- regnode *scan;
- I32 flags;
- I32 minlen = 0;
- I32 sawplus = 0;
- I32 sawopen = 0;
- scan_data_t data;
- RExC_state_t RExC_state;
- RExC_state_t * const pRExC_state = &RExC_state;
-#ifdef TRIE_STUDY_OPT
- int restudied= 0;
- RExC_state_t copyRExC_state;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_COMPILE;
-
- DEBUG_r(if (!PL_colorset) reginitcolors());
-
- RExC_utf8 = RExC_orig_utf8 = SvUTF8(pattern);
-
- DEBUG_COMPILE_r({
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RExC_utf8,
- dsv, exp, plen, 60);
- PerlIO_printf(Perl_debug_log, "%sCompiling REx%s %s\n",
- PL_colors[4],PL_colors[5],s);
- });
-
-redo_first_pass:
- RExC_precomp = exp;
- RExC_flags = pm_flags;
- RExC_sawback = 0;
-
- RExC_seen = 0;
- RExC_seen_zerolen = *exp == '^' ? -1 : 0;
- RExC_seen_evals = 0;
- RExC_extralen = 0;
-
- /* First pass: determine size, legality. */
- RExC_parse = exp;
- RExC_start = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_nestroot = 0;
- RExC_size = 0L;
- RExC_emit = &PL_regdummy;
- RExC_whilem_seen = 0;
- RExC_open_parens = NULL;
- RExC_close_parens = NULL;
- RExC_opend = NULL;
- RExC_paren_names = NULL;
-#ifdef DEBUGGING
- RExC_paren_name_list = NULL;
-#endif
- RExC_recurse = NULL;
- RExC_recurse_count = 0;
-
-#if 0 /* REGC() is (currently) a NOP at the first pass.
- * Clever compilers notice this and complain. --jhi */
- REGC((U8)REG_MAGIC, (char*)RExC_emit);
-#endif
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n"));
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- RExC_precomp = NULL;
- return(NULL);
- }
- if (RExC_utf8 && !RExC_orig_utf8) {
- /* It's possible to write a regexp in ascii that represents Unicode
- codepoints outside of the byte range, such as via \x{100}. If we
- detect such a sequence we have to convert the entire pattern to utf8
- and then recompile, as our sizing calculation will have been based
- on 1 byte == 1 character, but we will need to use utf8 to encode
- at least some part of the pattern, and therefore must convert the whole
- thing.
- XXX: somehow figure out how to make this less expensive...
- -- dmq */
- STRLEN len = plen;
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log,
- "UTF8 mismatch! Converting to utf8 for resizing and compile\n"));
- exp = (char*)Perl_bytes_to_utf8(aTHX_ (U8*)exp, &len);
- xend = exp + len;
- RExC_orig_utf8 = RExC_utf8;
- SAVEFREEPV(exp);
- goto redo_first_pass;
- }
- DEBUG_PARSE_r({
- PerlIO_printf(Perl_debug_log,
- "Required size %"IVdf" nodes\n"
- "Starting second pass (creation)\n",
- (IV)RExC_size);
- RExC_lastnum=0;
- RExC_lastparse=NULL;
- });
- /* Small enough for pointer-storage convention?
- If extralen==0, this means that we will not need long jumps. */
- if (RExC_size >= 0x10000L && RExC_extralen)
- RExC_size += RExC_extralen;
- else
- RExC_extralen = 0;
- if (RExC_whilem_seen > 15)
- RExC_whilem_seen = 15;
-
- /* Allocate space and zero-initialize. Note, the two step process
- of zeroing when in debug mode, thus anything assigned has to
- happen after that */
- rx = (REGEXP*) newSV_type(SVt_REGEXP);
- r = (struct regexp*)SvANY(rx);
- Newxc(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode),
- char, regexp_internal);
- if ( r == NULL || ri == NULL )
- FAIL("Regexp out of space");
-#ifdef DEBUGGING
- /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */
- Zero(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode), char);
-#else
- /* bulk initialize base fields with 0. */
- Zero(ri, sizeof(regexp_internal), char);
-#endif
-
- /* non-zero initialization begins here */
- RXi_SET( r, ri );
- r->engine= RE_ENGINE_PTR;
- r->extflags = pm_flags;
- {
- bool has_p = ((r->extflags & RXf_PMf_KEEPCOPY) == RXf_PMf_KEEPCOPY);
- bool has_minus = ((r->extflags & RXf_PMf_STD_PMMOD) != RXf_PMf_STD_PMMOD);
- bool has_runon = ((RExC_seen & REG_SEEN_RUN_ON_COMMENT)==REG_SEEN_RUN_ON_COMMENT);
- U16 reganch = (U16)((r->extflags & RXf_PMf_STD_PMMOD)
- >> RXf_PMf_STD_PMMOD_SHIFT);
- const char *fptr = STD_PAT_MODS; /*"msix"*/
- char *p;
- const STRLEN wraplen = plen + has_minus + has_p + has_runon
- + (sizeof(STD_PAT_MODS) - 1)
- + (sizeof("(?:)") - 1);
-
- p = sv_grow(MUTABLE_SV(rx), wraplen + 1);
- SvCUR_set(rx, wraplen);
- SvPOK_on(rx);
- SvFLAGS(rx) |= SvUTF8(pattern);
- *p++='('; *p++='?';
- if (has_p)
- *p++ = KEEPCOPY_PAT_MOD; /*'p'*/
- {
- char *r = p + (sizeof(STD_PAT_MODS) - 1) + has_minus - 1;
- char *colon = r + 1;
- char ch;
-
- while((ch = *fptr++)) {
- if(reganch & 1)
- *p++ = ch;
- else
- *r-- = ch;
- reganch >>= 1;
- }
- if(has_minus) {
- *r = '-';
- p = colon;
- }
- }
-
- *p++ = ':';
- Copy(RExC_precomp, p, plen, char);
- assert ((RX_WRAPPED(rx) - p) < 16);
- r->pre_prefix = p - RX_WRAPPED(rx);
- p += plen;
- if (has_runon)
- *p++ = '\n';
- *p++ = ')';
- *p = 0;
- }
-
- r->intflags = 0;
- r->nparens = RExC_npar - 1; /* set early to validate backrefs */
-
- if (RExC_seen & REG_SEEN_RECURSE) {
- Newxz(RExC_open_parens, RExC_npar,regnode *);
- SAVEFREEPV(RExC_open_parens);
- Newxz(RExC_close_parens,RExC_npar,regnode *);
- SAVEFREEPV(RExC_close_parens);
- }
-
- /* Useful during FAIL. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- Newxz(ri->u.offsets, 2*RExC_size+1, U32); /* MJD 20001228 */
- DEBUG_OFFSETS_r(PerlIO_printf(Perl_debug_log,
- "%s %"UVuf" bytes for offset annotations.\n",
- ri->u.offsets ? "Got" : "Couldn't get",
- (UV)((2*RExC_size+1) * sizeof(U32))));
-#endif
- SetProgLen(ri,RExC_size);
- RExC_rx_sv = rx;
- RExC_rx = r;
- RExC_rxi = ri;
-
- /* Second pass: emit code. */
- RExC_flags = pm_flags; /* don't let top level (?i) bleed */
- RExC_parse = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_emit_start = ri->program;
- RExC_emit = ri->program;
- RExC_emit_bound = ri->program + RExC_size + 1;
-
- /* Store the count of eval-groups for security checks: */
- RExC_rx->seen_evals = RExC_seen_evals;
- REGC((U8)REG_MAGIC, (char*) RExC_emit++);
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- ReREFCNT_dec(rx);
- return(NULL);
- }
- /* XXXX To minimize changes to RE engine we always allocate
- 3-units-long substrs field. */
- Newx(r->substrs, 1, struct reg_substr_data);
- if (RExC_recurse_count) {
- Newxz(RExC_recurse,RExC_recurse_count,regnode *);
- SAVEFREEPV(RExC_recurse);
- }
-
-reStudy:
- r->minlen = minlen = sawplus = sawopen = 0;
- Zero(r->substrs, 1, struct reg_substr_data);
-
-#ifdef TRIE_STUDY_OPT
- if (!restudied) {
- StructCopy(&zero_scan_data, &data, scan_data_t);
- copyRExC_state = RExC_state;
- } else {
- U32 seen=RExC_seen;
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log,"Restudying\n"));
-
- RExC_state = copyRExC_state;
- if (seen & REG_TOP_LEVEL_BRANCHES)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
- else
- RExC_seen &= ~REG_TOP_LEVEL_BRANCHES;
- if (data.last_found) {
- SvREFCNT_dec(data.longest_fixed);
- SvREFCNT_dec(data.longest_float);
- SvREFCNT_dec(data.last_found);
- }
- StructCopy(&zero_scan_data, &data, scan_data_t);
- }
-#else
- StructCopy(&zero_scan_data, &data, scan_data_t);
-#endif
-
- /* Dig out information for optimizations. */
- r->extflags = RExC_flags; /* was pm_op */
- /*dmq: removed as part of de-PMOP: pm->op_pmflags = RExC_flags; */
-
- if (UTF)
- SvUTF8_on(rx); /* Unicode in it? */
- ri->regstclass = NULL;
- if (RExC_naughty >= 10) /* Probably an expensive pattern. */
- r->intflags |= PREGf_NAUGHTY;
- scan = ri->program + 1; /* First BRANCH. */
-
- /* testing for BRANCH here tells us whether there is "must appear"
- data in the pattern. If there is then we can use it for optimisations */
- if (!(RExC_seen & REG_TOP_LEVEL_BRANCHES)) { /* Only one top-level choice. */
- I32 fake;
- STRLEN longest_float_length, longest_fixed_length;
- struct regnode_charclass_class ch_class; /* pointed to by data */
- int stclass_flag;
- I32 last_close = 0; /* pointed to by data */
- regnode *first= scan;
- regnode *first_next= regnext(first);
-
- /*
- * Skip introductions and multiplicators >= 1
- * so that we can extract the 'meat' of the pattern that must
- * match in the large if() sequence following.
- * NOTE that EXACT is NOT covered here, as it is normally
- * picked up by the optimiser separately.
- *
- * This is unfortunate as the optimiser isnt handling lookahead
- * properly currently.
- *
- */
- while ((OP(first) == OPEN && (sawopen = 1)) ||
- /* An OR of *one* alternative - should not happen now. */
- (OP(first) == BRANCH && OP(first_next) != BRANCH) ||
- /* for now we can't handle lookbehind IFMATCH*/
- (OP(first) == IFMATCH && !first->flags) ||
- (OP(first) == PLUS) ||
- (OP(first) == MINMOD) ||
- /* An {n,m} with n>0 */
- (PL_regkind[OP(first)] == CURLY && ARG1(first) > 0) ||
- (OP(first) == NOTHING && PL_regkind[OP(first_next)] != END ))
- {
- /*
- * the only op that could be a regnode is PLUS, all the rest
- * will be regnode_1 or regnode_2.
- *
- */
- if (OP(first) == PLUS)
- sawplus = 1;
- else
- first += regarglen[OP(first)];
-
- first = NEXTOPER(first);
- first_next= regnext(first);
- }
-
- /* Starting-point info. */
- again:
- DEBUG_PEEP("first:",first,0);
- /* Ignore EXACT as we deal with it later. */
- if (PL_regkind[OP(first)] == EXACT) {
- if (OP(first) == EXACT)
- NOOP; /* Empty, get anchored substr later. */
- else if ((OP(first) == EXACTF || OP(first) == EXACTFL))
- ri->regstclass = first;
- }
-#ifdef TRIE_STCLASS
- else if (PL_regkind[OP(first)] == TRIE &&
- ((reg_trie_data *)ri->data->data[ ARG(first) ])->minlen>0)
- {
- regnode *trie_op;
- /* this can happen only on restudy */
- if ( OP(first) == TRIE ) {
- struct regnode_1 *trieop = (struct regnode_1 *)
- PerlMemShared_calloc(1, sizeof(struct regnode_1));
- StructCopy(first,trieop,struct regnode_1);
- trie_op=(regnode *)trieop;
- } else {
- struct regnode_charclass *trieop = (struct regnode_charclass *)
- PerlMemShared_calloc(1, sizeof(struct regnode_charclass));
- StructCopy(first,trieop,struct regnode_charclass);
- trie_op=(regnode *)trieop;
- }
- OP(trie_op)+=2;
- make_trie_failtable(pRExC_state, (regnode *)first, trie_op, 0);
- ri->regstclass = trie_op;
- }
-#endif
- else if (strchr((const char*)PL_simple,OP(first)))
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOUND ||
- PL_regkind[OP(first)] == NBOUND)
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOL) {
- r->extflags |= (OP(first) == MBOL
- ? RXf_ANCH_MBOL
- : (OP(first) == SBOL
- ? RXf_ANCH_SBOL
- : RXf_ANCH_BOL));
- first = NEXTOPER(first);
- goto again;
- }
- else if (OP(first) == GPOS) {
- r->extflags |= RXf_ANCH_GPOS;
- first = NEXTOPER(first);
- goto again;
- }
- else if ((!sawopen || !RExC_sawback) &&
- (OP(first) == STAR &&
- PL_regkind[OP(NEXTOPER(first))] == REG_ANY) &&
- !(r->extflags & RXf_ANCH) && !(RExC_seen & REG_SEEN_EVAL))
- {
- /* turn .* into ^.* with an implied $*=1 */
- const int type =
- (OP(NEXTOPER(first)) == REG_ANY)
- ? RXf_ANCH_MBOL
- : RXf_ANCH_SBOL;
- r->extflags |= type;
- r->intflags |= PREGf_IMPLICIT;
- first = NEXTOPER(first);
- goto again;
- }
- if (sawplus && (!sawopen || !RExC_sawback)
- && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */
- /* x+ must match at the 1st pos of run of x's */
- r->intflags |= PREGf_SKIP;
-
- /* Scan is after the zeroth branch, first is atomic matcher. */
-#ifdef TRIE_STUDY_OPT
- DEBUG_PARSE_r(
- if (!restudied)
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#else
- DEBUG_PARSE_r(
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#endif
-
-
- /*
- * If there's something expensive in the r.e., find the
- * longest literal string that must appear and make it the
- * regmust. Resolve ties in favor of later strings, since
- * the regstart check works with the beginning of the r.e.
- * and avoiding duplication strengthens checking. Not a
- * strong reason, but sufficient in the absence of others.
- * [Now we resolve ties in favor of the earlier string if
- * it happens that c_offset_min has been invalidated, since the
- * earlier string may buy us something the later one won't.]
- */
-
- data.longest_fixed = newSVpvs("");
- data.longest_float = newSVpvs("");
- data.last_found = newSVpvs("");
- data.longest = &(data.longest_fixed);
- first = scan;
- if (!ri->regstclass) {
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- stclass_flag = SCF_DO_STCLASS_AND;
- } else /* XXXX Check for BOUND? */
- stclass_flag = 0;
- data.last_closep = &last_close;
-
- minlen = study_chunk(pRExC_state, &first, &minlen, &fake, scan + RExC_size, /* Up to end */
- &data, -1, NULL, NULL,
- SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag,0);
-
-
- CHECK_RESTUDY_GOTO;
-
-
- if ( RExC_npar == 1 && data.longest == &(data.longest_fixed)
- && data.last_start_min == 0 && data.last_end > 0
- && !RExC_seen_zerolen
- && !(RExC_seen & REG_SEEN_VERBARG)
- && (!(RExC_seen & REG_SEEN_GPOS) || (r->extflags & RXf_ANCH_GPOS)))
- r->extflags |= RXf_CHECK_ALL;
- scan_commit(pRExC_state, &data,&minlen,0);
- SvREFCNT_dec(data.last_found);
-
- /* Note that code very similar to this but for anchored string
- follows immediately below, changes may need to be made to both.
- Be careful.
- */
- longest_float_length = CHR_SVLEN(data.longest_float);
- if (longest_float_length
- || (data.flags & SF_FL_BEFORE_EOL
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */
- && data.offset_fixed == data.offset_float_min
- && SvCUR(data.longest_fixed) == SvCUR(data.longest_float))
- goto remove_float; /* As in (a)+. */
-
- /* copy the information about the longest float from the reg_scan_data
- over to the program. */
- if (SvUTF8(data.longest_float)) {
- r->float_utf8 = data.longest_float;
- r->float_substr = NULL;
- } else {
- r->float_substr = data.longest_float;
- r->float_utf8 = NULL;
- }
- /* float_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_float ? *(data.minlen_float)
- : (I32)longest_float_length;
- r->float_end_shift = ml - data.offset_float_min
- - longest_float_length + (SvTAIL(data.longest_float) != 0)
- + data.lookbehind_float;
- r->float_min_offset = data.offset_float_min - data.lookbehind_float;
- r->float_max_offset = data.offset_float_max;
- if (data.offset_float_max < I32_MAX) /* Don't offset infinity */
- r->float_max_offset -= data.lookbehind_float;
-
- t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_float, t ? FBMcf_TAIL : 0);
- }
- else {
- remove_float:
- r->float_substr = r->float_utf8 = NULL;
- SvREFCNT_dec(data.longest_float);
- longest_float_length = 0;
- }
-
- /* Note that code very similar to this but for floating string
- is immediately above, changes may need to be made to both.
- Be careful.
- */
- longest_fixed_length = CHR_SVLEN(data.longest_fixed);
- if (longest_fixed_length
- || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- /* copy the information about the longest fixed
- from the reg_scan_data over to the program. */
- if (SvUTF8(data.longest_fixed)) {
- r->anchored_utf8 = data.longest_fixed;
- r->anchored_substr = NULL;
- } else {
- r->anchored_substr = data.longest_fixed;
- r->anchored_utf8 = NULL;
- }
- /* fixed_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_fixed ? *(data.minlen_fixed)
- : (I32)longest_fixed_length;
- r->anchored_end_shift = ml - data.offset_fixed
- - longest_fixed_length + (SvTAIL(data.longest_fixed) != 0)
- + data.lookbehind_fixed;
- r->anchored_offset = data.offset_fixed - data.lookbehind_fixed;
-
- t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_fixed, t ? FBMcf_TAIL : 0);
- }
- else {
- r->anchored_substr = r->anchored_utf8 = NULL;
- SvREFCNT_dec(data.longest_fixed);
- longest_fixed_length = 0;
- }
- if (ri->regstclass
- && (OP(ri->regstclass) == REG_ANY || OP(ri->regstclass) == SANY))
- ri->regstclass = NULL;
- if ((!(r->anchored_substr || r->anchored_utf8) || r->anchored_offset)
- && stclass_flag
- && !(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV *sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
-
- /* A temporary algorithm prefers floated substr to fixed one to dig more info. */
- if (longest_fixed_length > longest_float_length) {
- r->check_end_shift = r->anchored_end_shift;
- r->check_substr = r->anchored_substr;
- r->check_utf8 = r->anchored_utf8;
- r->check_offset_min = r->check_offset_max = r->anchored_offset;
- if (r->extflags & RXf_ANCH_SINGLE)
- r->extflags |= RXf_NOSCAN;
- }
- else {
- r->check_end_shift = r->float_end_shift;
- r->check_substr = r->float_substr;
- r->check_utf8 = r->float_utf8;
- r->check_offset_min = r->float_min_offset;
- r->check_offset_max = r->float_max_offset;
- }
- /* XXXX Currently intuiting is not compatible with ANCH_GPOS.
- This should be changed ASAP! */
- if ((r->check_substr || r->check_utf8) && !(r->extflags & RXf_ANCH_GPOS)) {
- r->extflags |= RXf_USE_INTUIT;
- if (SvTAIL(r->check_substr ? r->check_substr : r->check_utf8))
- r->extflags |= RXf_INTUIT_TAIL;
- }
- /* XXX Unneeded? dmq (shouldn't as this is handled elsewhere)
- if ( (STRLEN)minlen < longest_float_length )
- minlen= longest_float_length;
- if ( (STRLEN)minlen < longest_fixed_length )
- minlen= longest_fixed_length;
- */
- }
- else {
- /* Several toplevels. Best we can is to set minlen. */
- I32 fake;
- struct regnode_charclass_class ch_class;
- I32 last_close = 0;
-
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "\nMulti Top Level\n"));
-
- scan = ri->program + 1;
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- data.last_closep = &last_close;
-
-
- minlen = study_chunk(pRExC_state, &scan, &minlen, &fake, scan + RExC_size,
- &data, -1, NULL, NULL, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS,0);
-
- CHECK_RESTUDY_GOTO;
-
- r->check_substr = r->check_utf8 = r->anchored_substr = r->anchored_utf8
- = r->float_substr = r->float_utf8 = NULL;
- if (!(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV* sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
- }
-
- /* Guard against an embedded (?=) or (?<=) with a longer minlen than
- the "real" pattern. */
- DEBUG_OPTIMISE_r({
- PerlIO_printf(Perl_debug_log,"minlen: %"IVdf" r->minlen:%"IVdf"\n",
- (IV)minlen, (IV)r->minlen);
- });
- r->minlenret = minlen;
- if (r->minlen < minlen)
- r->minlen = minlen;
-
- if (RExC_seen & REG_SEEN_GPOS)
- r->extflags |= RXf_GPOS_SEEN;
- if (RExC_seen & REG_SEEN_LOOKBEHIND)
- r->extflags |= RXf_LOOKBEHIND_SEEN;
- if (RExC_seen & REG_SEEN_EVAL)
- r->extflags |= RXf_EVAL_SEEN;
- if (RExC_seen & REG_SEEN_CANY)
- r->extflags |= RXf_CANY_SEEN;
- if (RExC_seen & REG_SEEN_VERBARG)
- r->intflags |= PREGf_VERBARG_SEEN;
- if (RExC_seen & REG_SEEN_CUTGROUP)
- r->intflags |= PREGf_CUTGROUP_SEEN;
- if (RExC_paren_names)
- RXp_PAREN_NAMES(r) = MUTABLE_HV(SvREFCNT_inc(RExC_paren_names));
- else
- RXp_PAREN_NAMES(r) = NULL;
-
-#ifdef STUPID_PATTERN_CHECKS
- if (RX_PRELEN(rx) == 0)
- r->extflags |= RXf_NULL;
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else if (RX_PRELEN(rx) == 3 && memEQ("\\s+", RX_PRECOMP(rx), 3))
- r->extflags |= RXf_WHITE;
- else if (RX_PRELEN(rx) == 1 && RXp_PRECOMP(rx)[0] == '^')
- r->extflags |= RXf_START_ONLY;
-#else
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else {
- regnode *first = ri->program + 1;
- U8 fop = OP(first);
- U8 nop = OP(NEXTOPER(first));
-
- if (PL_regkind[fop] == NOTHING && nop == END)
- r->extflags |= RXf_NULL;
- else if (PL_regkind[fop] == BOL && nop == END)
- r->extflags |= RXf_START_ONLY;
- else if (fop == PLUS && nop ==SPACE && OP(regnext(first))==END)
- r->extflags |= RXf_WHITE;
- }
-#endif
-#ifdef DEBUGGING
- if (RExC_paren_names) {
- ri->name_list_idx = add_data( pRExC_state, 1, "p" );
- ri->data->data[ri->name_list_idx] = (void*)SvREFCNT_inc(RExC_paren_name_list);
- } else
-#endif
- ri->name_list_idx = 0;
-
- if (RExC_recurse_count) {
- for ( ; RExC_recurse_count ; RExC_recurse_count-- ) {
- const regnode *scan = RExC_recurse[RExC_recurse_count-1];
- ARG2L_SET( scan, RExC_open_parens[ARG(scan)-1] - scan );
- }
- }
- Newxz(r->offs, RExC_npar, regexp_paren_pair);
- /* assume we don't need to swap parens around before we match */
-
- DEBUG_DUMP_r({
- PerlIO_printf(Perl_debug_log,"Final program:\n");
- regdump(r);
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_OFFSETS_r(if (ri->u.offsets) {
- const U32 len = ri->u.offsets[0];
- U32 i;
- GET_RE_DEBUG_FLAGS_DECL;
- PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)ri->u.offsets[0]);
- for (i = 1; i <= len; i++) {
- if (ri->u.offsets[i*2-1] || ri->u.offsets[i*2])
- PerlIO_printf(Perl_debug_log, "%"UVuf":%"UVuf"[%"UVuf"] ",
- (UV)i, (UV)ri->u.offsets[i*2-1], (UV)ri->u.offsets[i*2]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
-#endif
- return rx;
-}
-
-#undef RE_ENGINE_PTR
-
-
-SV*
-Perl_reg_named_buff(pTHX_ REGEXP * const rx, SV * const key, SV * const value,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF;
-
- PERL_UNUSED_ARG(value);
-
- if (flags & RXapif_FETCH) {
- return reg_named_buff_fetch(rx, key, flags);
- } else if (flags & (RXapif_STORE | RXapif_DELETE | RXapif_CLEAR)) {
- Perl_croak(aTHX_ "%s", PL_no_modify);
- return NULL;
- } else if (flags & RXapif_EXISTS) {
- return reg_named_buff_exists(rx, key, flags)
- ? &PL_sv_yes
- : &PL_sv_no;
- } else if (flags & RXapif_REGNAMES) {
- return reg_named_buff_all(rx, flags);
- } else if (flags & (RXapif_SCALAR | RXapif_REGNAMES_COUNT)) {
- return reg_named_buff_scalar(rx, flags);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_iter(pTHX_ REGEXP * const rx, const SV * const lastkey,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ITER;
- PERL_UNUSED_ARG(lastkey);
-
- if (flags & RXapif_FIRSTKEY)
- return reg_named_buff_firstkey(rx, flags);
- else if (flags & RXapif_NEXTKEY)
- return reg_named_buff_nextkey(rx, flags);
- else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_iter", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_fetch(pTHX_ REGEXP * const r, SV * const namesv,
- const U32 flags)
-{
- AV *retarray = NULL;
- SV *ret;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FETCH;
-
- if (flags & RXapif_ALL)
- retarray=newAV();
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HE *he_str = hv_fetch_ent( RXp_PAREN_NAMES(rx), namesv, 0, 0 );
- if (he_str) {
- IV i;
- SV* sv_dat=HeVAL(he_str);
- I32 *nums=(I32*)SvPVX(sv_dat);
- for ( i=0; i<SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->nparens) >= nums[i]
- && rx->offs[nums[i]].start != -1
- && rx->offs[nums[i]].end != -1)
- {
- ret = newSVpvs("");
- CALLREG_NUMBUF_FETCH(r,nums[i],ret);
- if (!retarray)
- return ret;
- } else {
- ret = newSVsv(&PL_sv_undef);
- }
- if (retarray)
- av_push(retarray, ret);
- }
- if (retarray)
- return newRV_noinc(MUTABLE_SV(retarray));
- }
- }
- return NULL;
-}
-
-bool
-Perl_reg_named_buff_exists(pTHX_ REGEXP * const r, SV * const key,
- const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_EXISTS;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & RXapif_ALL) {
- return hv_exists_ent(RXp_PAREN_NAMES(rx), key, 0);
- } else {
- SV *sv = CALLREG_NAMED_BUFF_FETCH(r, key, flags);
- if (sv) {
- SvREFCNT_dec(sv);
- return TRUE;
- } else {
- return FALSE;
- }
- }
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_firstkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FIRSTKEY;
-
- if ( rx && RXp_PAREN_NAMES(rx) ) {
- (void)hv_iterinit(RXp_PAREN_NAMES(rx));
-
- return CALLREG_NAMED_BUFF_NEXTKEY(r, NULL, flags & ~RXapif_FIRSTKEY);
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_nextkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_NEXTKEY;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv = RXp_PAREN_NAMES(rx);
- HE *temphe;
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- return newSVhek(HeKEY_hek(temphe));
- }
- }
- }
- return NULL;
-}
-
-SV*
-Perl_reg_named_buff_scalar(pTHX_ REGEXP * const r, const U32 flags)
-{
- SV *ret;
- AV *av;
- I32 length;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_SCALAR;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & (RXapif_ALL | RXapif_REGNAMES_COUNT)) {
- return newSViv(HvTOTALKEYS(RXp_PAREN_NAMES(rx)));
- } else if (flags & RXapif_ONE) {
- ret = CALLREG_NAMED_BUFF_ALL(r, (flags | RXapif_REGNAMES));
- av = MUTABLE_AV(SvRV(ret));
- length = av_len(av);
- SvREFCNT_dec(ret);
- return newSViv(length + 1);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_scalar", (int)flags);
- return NULL;
- }
- }
- return &PL_sv_undef;
-}
-
-SV*
-Perl_reg_named_buff_all(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- AV *av = newAV();
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ALL;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv= RXp_PAREN_NAMES(rx);
- HE *temphe;
- (void)hv_iterinit(hv);
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- av_push(av, newSVhek(HeKEY_hek(temphe)));
- }
- }
- }
-
- return newRV_noinc(MUTABLE_SV(av));
-}
-
-void
-Perl_reg_numbered_buff_fetch(pTHX_ REGEXP * const r, const I32 paren,
- SV * const sv)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- char *s = NULL;
- I32 i = 0;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_FETCH;
-
- if (!rx->subbeg) {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- else
- if (paren == RX_BUFF_IDX_PREMATCH && rx->offs[0].start != -1) {
- /* $` */
- i = rx->offs[0].start;
- s = rx->subbeg;
- }
- else
- if (paren == RX_BUFF_IDX_POSTMATCH && rx->offs[0].end != -1) {
- /* $' */
- s = rx->subbeg + rx->offs[0].end;
- i = rx->sublen - rx->offs[0].end;
- }
- else
- if ( 0 <= paren && paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- /* $& $1 ... */
- i = t1 - s1;
- s = rx->subbeg + s1;
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- assert(rx->sublen >= (s - rx->subbeg) + i );
- if (i >= 0) {
- const int oldtainted = PL_tainted;
- TAINT_NOT;
- sv_setpvn(sv, s, i);
- PL_tainted = oldtainted;
- if ( (rx->extflags & RXf_CANY_SEEN)
- ? (RXp_MATCH_UTF8(rx)
- && (!i || is_utf8_string((U8*)s, i)))
- : (RXp_MATCH_UTF8(rx)) )
- {
- SvUTF8_on(sv);
- }
- else
- SvUTF8_off(sv);
- if (PL_tainting) {
- if (RXp_MATCH_TAINTED(rx)) {
- if (SvTYPE(sv) >= SVt_PVMG) {
- MAGIC* const mg = SvMAGIC(sv);
- MAGIC* mgt;
- PL_tainted = 1;
- SvMAGIC_set(sv, mg->mg_moremagic);
- SvTAINT(sv);
- if ((mgt = SvMAGIC(sv))) {
- mg->mg_moremagic = mgt;
- SvMAGIC_set(sv, mg);
- }
- } else {
- PL_tainted = 1;
- SvTAINT(sv);
- }
- } else
- SvTAINTED_off(sv);
- }
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
-}
-
-void
-Perl_reg_numbered_buff_store(pTHX_ REGEXP * const rx, const I32 paren,
- SV const * const value)
-{
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_STORE;
-
- PERL_UNUSED_ARG(rx);
- PERL_UNUSED_ARG(paren);
- PERL_UNUSED_ARG(value);
-
- if (!PL_localizing)
- Perl_croak(aTHX_ "%s", PL_no_modify);
-}
-
-I32
-Perl_reg_numbered_buff_length(pTHX_ REGEXP * const r, const SV * const sv,
- const I32 paren)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- I32 i;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_LENGTH;
-
- /* Some of this code was originally in C<Perl_magic_len> in F<mg.c> */
- switch (paren) {
- /* $` / ${^PREMATCH} */
- case RX_BUFF_IDX_PREMATCH:
- if (rx->offs[0].start != -1) {
- i = rx->offs[0].start;
- if (i > 0) {
- s1 = 0;
- t1 = i;
- goto getlen;
- }
- }
- return 0;
- /* $' / ${^POSTMATCH} */
- case RX_BUFF_IDX_POSTMATCH:
- if (rx->offs[0].end != -1) {
- i = rx->sublen - rx->offs[0].end;
- if (i > 0) {
- s1 = rx->offs[0].end;
- t1 = rx->sublen;
- goto getlen;
- }
- }
- return 0;
- /* $& / ${^MATCH}, $1, $2, ... */
- default:
- if (paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- i = t1 - s1;
- goto getlen;
- } else {
- if (ckWARN(WARN_UNINITIALIZED))
- report_uninit((const SV *)sv);
- return 0;
- }
- }
- getlen:
- if (i > 0 && RXp_MATCH_UTF8(rx)) {
- const char * const s = rx->subbeg + s1;
- const U8 *ep;
- STRLEN el;
-
- i = t1 - s1;
- if (is_utf8_string_loclen((U8*)s, i, &ep, &el))
- i = el;
- }
- return i;
-}
-
-SV*
-Perl_reg_qr_package(pTHX_ REGEXP * const rx)
-{
- PERL_ARGS_ASSERT_REG_QR_PACKAGE;
- PERL_UNUSED_ARG(rx);
- if (0)
- return NULL;
- else
- return newSVpvs("Regexp");
-}
-
-/* Scans the name of a named buffer from the pattern.
- * If flags is REG_RSN_RETURN_NULL returns null.
- * If flags is REG_RSN_RETURN_NAME returns an SV* containing the name
- * If flags is REG_RSN_RETURN_DATA returns the data SV* corresponding
- * to the parsed name as looked up in the RExC_paren_names hash.
- * If there is an error throws a vFAIL().. type exception.
- */
-
-#define REG_RSN_RETURN_NULL 0
-#define REG_RSN_RETURN_NAME 1
-#define REG_RSN_RETURN_DATA 2
-
-STATIC SV*
-S_reg_scan_name(pTHX_ RExC_state_t *pRExC_state, U32 flags)
-{
- char *name_start = RExC_parse;
-
- PERL_ARGS_ASSERT_REG_SCAN_NAME;
-
- if (isIDFIRST_lazy_if(RExC_parse, UTF)) {
- /* skip IDFIRST by using do...while */
- if (UTF)
- do {
- RExC_parse += UTF8SKIP(RExC_parse);
- } while (isALNUM_utf8((U8*)RExC_parse));
- else
- do {
- RExC_parse++;
- } while (isALNUM(*RExC_parse));
- }
-
- if ( flags ) {
- SV* sv_name
- = newSVpvn_flags(name_start, (int)(RExC_parse - name_start),
- SVs_TEMP | (UTF ? SVf_UTF8 : 0));
- if ( flags == REG_RSN_RETURN_NAME)
- return sv_name;
- else if (flags==REG_RSN_RETURN_DATA) {
- HE *he_str = NULL;
- SV *sv_dat = NULL;
- if ( ! sv_name ) /* should not happen*/
- Perl_croak(aTHX_ "panic: no svname in reg_scan_name");
- if (RExC_paren_names)
- he_str = hv_fetch_ent( RExC_paren_names, sv_name, 0, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat )
- vFAIL("Reference to nonexistent named group");
- return sv_dat;
- }
- else {
- Perl_croak(aTHX_ "panic: bad flag in reg_scan_name");
- }
- /* NOT REACHED */
- }
- return NULL;
-}
-
-#define DEBUG_PARSE_MSG(funcname) DEBUG_PARSE_r({ \
- int rem=(int)(RExC_end - RExC_parse); \
- int cut; \
- int num; \
- int iscut=0; \
- if (rem>10) { \
- rem=10; \
- iscut=1; \
- } \
- cut=10-rem; \
- if (RExC_lastparse!=RExC_parse) \
- PerlIO_printf(Perl_debug_log," >%.*s%-*s", \
- rem, RExC_parse, \
- cut + 4, \
- iscut ? "..." : "<" \
- ); \
- else \
- PerlIO_printf(Perl_debug_log,"%16s",""); \
- \
- if (SIZE_ONLY) \
- num = RExC_size + 1; \
- else \
- num=REG_NODE_NUM(RExC_emit); \
- if (RExC_lastnum!=num) \
- PerlIO_printf(Perl_debug_log,"|%4d",num); \
- else \
- PerlIO_printf(Perl_debug_log,"|%4s",""); \
- PerlIO_printf(Perl_debug_log,"|%*s%-4s", \
- (int)((depth*2)), "", \
- (funcname) \
- ); \
- RExC_lastnum=num; \
- RExC_lastparse=RExC_parse; \
-})
-
-
-
-#define DEBUG_PARSE(funcname) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,"%4s","\n"); \
-})
-#define DEBUG_PARSE_FMT(funcname,fmt,args) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,fmt "\n",args); \
-})
-/*
- - reg - regular expression, i.e. main body or parenthesized thing
- *
- * Caller must absorb opening parenthesis.
- *
- * Combining parenthesis handling with the base level of regular expression
- * is a trifle forced, but the need to tie the tails of the branches to what
- * follows makes it hard to avoid.
- */
-#define REGTAIL(x,y,z) regtail((x),(y),(z),depth+1)
-#ifdef DEBUGGING
-#define REGTAIL_STUDY(x,y,z) regtail_study((x),(y),(z),depth+1)
-#else
-#define REGTAIL_STUDY(x,y,z) regtail((x),(y),(z),depth+1)
-#endif
-
-STATIC regnode *
-S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth)
- /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */
-{
- dVAR;
- register regnode *ret; /* Will be the head of the group. */
- register regnode *br;
- register regnode *lastbr;
- register regnode *ender = NULL;
- register I32 parno = 0;
- I32 flags;
- U32 oregflags = RExC_flags;
- bool have_branch = 0;
- bool is_open = 0;
- I32 freeze_paren = 0;
- I32 after_freeze = 0;
-
- /* for (?g), (?gc), and (?o) warnings; warning
- about (?c) will warn about (?g) -- japhy */
-
-#define WASTED_O 0x01
-#define WASTED_G 0x02
-#define WASTED_C 0x04
-#define WASTED_GC (0x02|0x04)
- I32 wastedflags = 0x00;
-
- char * parse_start = RExC_parse; /* MJD */
- char * const oregcomp_parse = RExC_parse;
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG;
- DEBUG_PARSE("reg ");
-
- *flagp = 0; /* Tentatively. */
-
-
- /* Make an OPEN node, if parenthesized. */
- if (paren) {
- if ( *RExC_parse == '*') { /* (*VERB:ARG) */
- char *start_verb = RExC_parse;
- STRLEN verb_len = 0;
- char *start_arg = NULL;
- unsigned char op = 0;
- int argok = 1;
- int internal_argval = 0; /* internal_argval is only useful if !argok */
- while ( *RExC_parse && *RExC_parse != ')' ) {
- if ( *RExC_parse == ':' ) {
- start_arg = RExC_parse + 1;
- break;
- }
- RExC_parse++;
- }
- ++start_verb;
- verb_len = RExC_parse - start_verb;
- if ( start_arg ) {
- RExC_parse++;
- while ( *RExC_parse && *RExC_parse != ')' )
- RExC_parse++;
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern argument");
- if ( RExC_parse == start_arg )
- start_arg = NULL;
- } else {
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern");
- }
-
- switch ( *start_verb ) {
- case 'A': /* (*ACCEPT) */
- if ( memEQs(start_verb,verb_len,"ACCEPT") ) {
- op = ACCEPT;
- internal_argval = RExC_nestroot;
- }
- break;
- case 'C': /* (*COMMIT) */
- if ( memEQs(start_verb,verb_len,"COMMIT") )
- op = COMMIT;
- break;
- case 'F': /* (*FAIL) */
- if ( verb_len==1 || memEQs(start_verb,verb_len,"FAIL") ) {
- op = OPFAIL;
- argok = 0;
- }
- break;
- case ':': /* (*:NAME) */
- case 'M': /* (*MARK:NAME) */
- if ( verb_len==0 || memEQs(start_verb,verb_len,"MARK") ) {
- op = MARKPOINT;
- argok = -1;
- }
- break;
- case 'P': /* (*PRUNE) */
- if ( memEQs(start_verb,verb_len,"PRUNE") )
- op = PRUNE;
- break;
- case 'S': /* (*SKIP) */
- if ( memEQs(start_verb,verb_len,"SKIP") )
- op = SKIP;
- break;
- case 'T': /* (*THEN) */
- /* [19:06] <TimToady> :: is then */
- if ( memEQs(start_verb,verb_len,"THEN") ) {
- op = CUTGROUP;
- RExC_seen |= REG_SEEN_CUTGROUP;
- }
- break;
- }
- if ( ! op ) {
- RExC_parse++;
- vFAIL3("Unknown verb pattern '%.*s'",
- verb_len, start_verb);
- }
- if ( argok ) {
- if ( start_arg && internal_argval ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else if ( argok < 0 && !start_arg ) {
- vFAIL3("Verb pattern '%.*s' has a mandatory argument",
- verb_len, start_verb);
- } else {
- ret = reganode(pRExC_state, op, internal_argval);
- if ( ! internal_argval && ! SIZE_ONLY ) {
- if (start_arg) {
- SV *sv = newSVpvn( start_arg, RExC_parse - start_arg);
- ARG(ret) = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[ARG(ret)]=(void*)sv;
- ret->flags = 0;
- } else {
- ret->flags = 1;
- }
- }
- }
- if (!internal_argval)
- RExC_seen |= REG_SEEN_VERBARG;
- } else if ( start_arg ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else {
- ret = reg_node(pRExC_state, op);
- }
- nextchar(pRExC_state);
- return ret;
- } else
- if (*RExC_parse == '?') { /* (?...) */
- bool is_logical = 0;
- const char * const seqstart = RExC_parse;
-
- RExC_parse++;
- paren = *RExC_parse++;
- ret = NULL; /* For look-ahead/behind. */
- switch (paren) {
-
- case 'P': /* (?P...) variants for those used to PCRE/Python */
- paren = *RExC_parse++;
- if ( paren == '<') /* (?P<...>) named capture */
- goto named_capture;
- else if (paren == '>') { /* (?P>name) named recursion */
- goto named_recursion;
- }
- else if (paren == '=') { /* (?P=...) named backref */
- /* this pretty much dupes the code for \k<NAME> in regatom(), if
- you change this make sure you change that */
- char* name_start = RExC_parse;
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ')')
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
-
- nextchar(pRExC_state);
- return ret;
- }
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- case '<': /* (?<...) */
- if (*RExC_parse == '!')
- paren = ',';
- else if (*RExC_parse != '=')
- named_capture:
- { /* (?<...>) */
- char *name_start;
- SV *svname;
- paren= '>';
- case '\'': /* (?'...') */
- name_start= RExC_parse;
- svname = reg_scan_name(pRExC_state,
- SIZE_ONLY ? /* reverse test from the others */
- REG_RSN_RETURN_NAME :
- REG_RSN_RETURN_NULL);
- if (RExC_parse == name_start) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- if (*RExC_parse != paren)
- vFAIL2("Sequence (?%c... not terminated",
- paren=='>' ? '<' : paren);
- if (SIZE_ONLY) {
- HE *he_str;
- SV *sv_dat = NULL;
- if (!svname) /* shouldnt happen */
- Perl_croak(aTHX_
- "panic: reg_scan_name returned NULL");
- if (!RExC_paren_names) {
- RExC_paren_names= newHV();
- sv_2mortal(MUTABLE_SV(RExC_paren_names));
-#ifdef DEBUGGING
- RExC_paren_name_list= newAV();
- sv_2mortal(MUTABLE_SV(RExC_paren_name_list));
-#endif
- }
- he_str = hv_fetch_ent( RExC_paren_names, svname, 1, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat ) {
- /* croak baby croak */
- Perl_croak(aTHX_
- "panic: paren_name hash element allocation failed");
- } else if ( SvPOK(sv_dat) ) {
- /* (?|...) can mean we have dupes so scan to check
- its already been stored. Maybe a flag indicating
- we are inside such a construct would be useful,
- but the arrays are likely to be quite small, so
- for now we punt -- dmq */
- IV count = SvIV(sv_dat);
- I32 *pv = (I32*)SvPVX(sv_dat);
- IV i;
- for ( i = 0 ; i < count ; i++ ) {
- if ( pv[i] == RExC_npar ) {
- count = 0;
- break;
- }
- }
- if ( count ) {
- pv = (I32*)SvGROW(sv_dat, SvCUR(sv_dat) + sizeof(I32)+1);
- SvCUR_set(sv_dat, SvCUR(sv_dat) + sizeof(I32));
- pv[count] = RExC_npar;
- SvIV_set(sv_dat, SvIVX(sv_dat) + 1);
- }
- } else {
- (void)SvUPGRADE(sv_dat,SVt_PVNV);
- sv_setpvn(sv_dat, (char *)&(RExC_npar), sizeof(I32));
- SvIOK_on(sv_dat);
- SvIV_set(sv_dat, 1);
- }
-#ifdef DEBUGGING
- if (!av_store(RExC_paren_name_list, RExC_npar, SvREFCNT_inc(svname)))
- SvREFCNT_dec(svname);
-#endif
-
- /*sv_dump(sv_dat);*/
- }
- nextchar(pRExC_state);
- paren = 1;
- goto capturing_parens;
- }
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- RExC_parse++;
- case '=': /* (?=...) */
- RExC_seen_zerolen++;
- break;
- case '!': /* (?!...) */
- RExC_seen_zerolen++;
- if (*RExC_parse == ')') {
- ret=reg_node(pRExC_state, OPFAIL);
- nextchar(pRExC_state);
- return ret;
- }
- break;
- case '|': /* (?|...) */
- /* branch reset, behave like a (?:...) except that
- buffers in alternations share the same numbers */
- paren = ':';
- after_freeze = freeze_paren = RExC_npar;
- break;
- case ':': /* (?:...) */
- case '>': /* (?>...) */
- break;
- case '$': /* (?$...) */
- case '@': /* (?@...) */
- vFAIL2("Sequence (?%c...) not implemented", (int)paren);
- break;
- case '#': /* (?#...) */
- while (*RExC_parse && *RExC_parse != ')')
- RExC_parse++;
- if (*RExC_parse != ')')
- FAIL("Sequence (?#... not terminated");
- nextchar(pRExC_state);
- *flagp = TRYAGAIN;
- return NULL;
- case '0' : /* (?0) */
- case 'R' : /* (?R) */
- if (*RExC_parse != ')')
- FAIL("Sequence (?R) not terminated");
- ret = reg_node(pRExC_state, GOSTART);
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- /*notreached*/
- { /* named and numeric backreferences */
- I32 num;
- case '&': /* (?&NAME) */
- parse_start = RExC_parse - 1;
- named_recursion:
- {
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- num = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- goto gen_recurse_regop;
- /* NOT REACHED */
- case '+':
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse++;
- vFAIL("Illegal pattern");
- }
- goto parse_recursion;
- /* NOT REACHED*/
- case '-': /* (?-1) */
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse--; /* rewind to let it be handled later */
- goto parse_flags;
- }
- /*FALLTHROUGH */
- case '1': case '2': case '3': case '4': /* (?1) */
- case '5': case '6': case '7': case '8': case '9':
- RExC_parse--;
- parse_recursion:
- num = atoi(RExC_parse);
- parse_start = RExC_parse - 1; /* MJD */
- if (*RExC_parse == '-')
- RExC_parse++;
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (*RExC_parse!=')')
- vFAIL("Expecting close bracket");
-
- gen_recurse_regop:
- if ( paren == '-' ) {
- /*
- Diagram of capture buffer numbering.
- Top line is the normal capture buffer numbers
- Botton line is the negative indexing as from
- the X (the (?-2))
-
- + 1 2 3 4 5 X 6 7
- /(a(x)y)(a(b(c(?-2)d)e)f)(g(h))/
- - 5 4 3 2 1 X x x
-
- */
- num = RExC_npar + num;
- if (num < 1) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- } else if ( paren == '+' ) {
- num = RExC_npar + num - 1;
- }
-
- ret = reganode(pRExC_state, GOSUB, num);
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- ARG2L_SET( ret, RExC_recurse_count++);
- RExC_emit++;
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Recurse #%"UVuf" to %"IVdf"\n", (UV)ARG(ret), (IV)ARG2L(ret)));
- } else {
- RExC_size++;
- }
- RExC_seen |= REG_SEEN_RECURSE;
- Set_Node_Length(ret, 1 + regarglen[OP(ret)]); /* MJD */
- Set_Node_Offset(ret, parse_start); /* MJD */
-
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- } /* named and numeric backreferences */
- /* NOT REACHED */
-
- case '?': /* (??...) */
- is_logical = 1;
- if (*RExC_parse != '{') {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- *flagp |= POSTPONED;
- paren = *RExC_parse++;
- /* FALL THROUGH */
- case '{': /* (?{...}) */
- {
- I32 count = 1;
- U32 n = 0;
- char c;
- char *s = RExC_parse;
-
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_EVAL;
- while (count && (c = *RExC_parse)) {
- if (c == '\\') {
- if (RExC_parse[1])
- RExC_parse++;
- }
- else if (c == '{')
- count++;
- else if (c == '}')
- count--;
- RExC_parse++;
- }
- if (*RExC_parse != ')') {
- RExC_parse = s;
- vFAIL("Sequence (?{...}) not terminated or not {}-balanced");
- }
- if (!SIZE_ONLY) {
- PAD *pad;
- OP_4tree *sop, *rop;
- SV * const sv = newSVpvn(s, RExC_parse - 1 - s);
-
- ENTER;
- Perl_save_re_context(aTHX);
- rop = sv_compile_2op(sv, &sop, "re", &pad);
- sop->op_private |= OPpREFCOUNTED;
- /* re_dup will OpREFCNT_inc */
- OpREFCNT_set(sop, 1);
- LEAVE;
-
- n = add_data(pRExC_state, 3, "nop");
- RExC_rxi->data->data[n] = (void*)rop;
- RExC_rxi->data->data[n+1] = (void*)sop;
- RExC_rxi->data->data[n+2] = (void*)pad;
- SvREFCNT_dec(sv);
- }
- else { /* First pass */
- if (PL_reginterp_cnt < ++RExC_seen_evals
- && IN_PERL_RUNTIME)
- /* No compiled RE interpolated, has runtime
- components ===> unsafe. */
- FAIL("Eval-group not allowed at runtime, use re 'eval'");
- if (PL_tainting && PL_tainted)
- FAIL("Eval-group in insecure regular expression");
-#if PERL_VERSION > 8
- if (IN_PERL_COMPILETIME)
- PL_cv_has_eval = 1;
-#endif
- }
-
- nextchar(pRExC_state);
- if (is_logical) {
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 2;
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, EVAL, n));
- /* deal with the length of this later - MJD */
- return ret;
- }
- ret = reganode(pRExC_state, EVAL, n);
- Set_Node_Length(ret, RExC_parse - parse_start + 1);
- Set_Node_Offset(ret, parse_start);
- return ret;
- }
- case '(': /* (?(?{...})...) and (?(?=...)...) */
- {
- int is_define= 0;
- if (RExC_parse[0] == '?') { /* (?(?...)) */
- if (RExC_parse[1] == '=' || RExC_parse[1] == '!'
- || RExC_parse[1] == '<'
- || RExC_parse[1] == '{') { /* Lookahead or eval. */
- I32 flag;
-
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 1;
- REGTAIL(pRExC_state, ret, reg(pRExC_state, 1, &flag,depth+1));
- goto insert_if;
- }
- }
- else if ( RExC_parse[0] == '<' /* (?(<NAME>)...) */
- || RExC_parse[0] == '\'' ) /* (?('NAME')...) */
- {
- char ch = RExC_parse[0] == '<' ? '>' : '\'';
- char *name_start= RExC_parse++;
- U32 num = 0;
- SV *sv_dat=reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence (?(%c... not terminated",
- (ch == '>' ? '<' : ch));
- RExC_parse++;
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- ret = reganode(pRExC_state,NGROUPP,num);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'D' &&
- RExC_parse[1] == 'E' &&
- RExC_parse[2] == 'F' &&
- RExC_parse[3] == 'I' &&
- RExC_parse[4] == 'N' &&
- RExC_parse[5] == 'E')
- {
- ret = reganode(pRExC_state,DEFINEP,0);
- RExC_parse +=6 ;
- is_define = 1;
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'R') {
- RExC_parse++;
- parno = 0;
- if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- parno = atoi(RExC_parse++);
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- } else if (RExC_parse[0] == '&') {
- SV *sv_dat;
- RExC_parse++;
- sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- parno = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- ret = reganode(pRExC_state,INSUBP,parno);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- /* (?(1)...) */
- char c;
- parno = atoi(RExC_parse++);
-
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- ret = reganode(pRExC_state, GROUPP, parno);
-
- insert_if_check_paren:
- if ((c = *nextchar(pRExC_state)) != ')')
- vFAIL("Switch condition not recognized");
- insert_if:
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0));
- br = regbranch(pRExC_state, &flags, 1,depth+1);
- if (br == NULL)
- br = reganode(pRExC_state, LONGJMP, 0);
- else
- REGTAIL(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0));
- c = *nextchar(pRExC_state);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- if (c == '|') {
- if (is_define)
- vFAIL("(?(DEFINE)....) does not allow branches");
- lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */
- regbranch(pRExC_state, &flags, 1,depth+1);
- REGTAIL(pRExC_state, ret, lastbr);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- c = *nextchar(pRExC_state);
- }
- else
- lastbr = NULL;
- if (c != ')')
- vFAIL("Switch (?(condition)... contains too many branches");
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, br, ender);
- if (lastbr) {
- REGTAIL(pRExC_state, lastbr, ender);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender);
- }
- else
- REGTAIL(pRExC_state, ret, ender);
- RExC_size++; /* XXX WHY do we need this?!!
- For large programs it seems to be required
- but I can't figure out why. -- dmq*/
- return ret;
- }
- else {
- vFAIL2("Unknown switch condition (?(%.2s", RExC_parse);
- }
- }
- case 0:
- RExC_parse--; /* for vFAIL to print correctly */
- vFAIL("Sequence (? incomplete");
- break;
- default:
- --RExC_parse;
- parse_flags: /* (?i) */
- {
- U32 posflags = 0, negflags = 0;
- U32 *flagsp = &posflags;
-
- while (*RExC_parse) {
- /* && strchr("iogcmsx", *RExC_parse) */
- /* (?g), (?gc) and (?o) are useless here
- and must be globally applied -- japhy */
- switch (*RExC_parse) {
- CASE_STD_PMMOD_FLAGS_PARSE_SET(flagsp);
- case ONCE_PAT_MOD: /* 'o' */
- case GLOBAL_PAT_MOD: /* 'g' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- const I32 wflagbit = *RExC_parse == 'o' ? WASTED_O : WASTED_G;
- if (! (wastedflags & wflagbit) ) {
- wastedflags |= wflagbit;
- vWARN5(
- RExC_parse + 1,
- "Useless (%s%c) - %suse /%c modifier",
- flagsp == &negflags ? "?-" : "?",
- *RExC_parse,
- flagsp == &negflags ? "don't " : "",
- *RExC_parse
- );
- }
- }
- break;
-
- case CONTINUE_PAT_MOD: /* 'c' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- if (! (wastedflags & WASTED_C) ) {
- wastedflags |= WASTED_GC;
- vWARN3(
- RExC_parse + 1,
- "Useless (%sc) - %suse /gc modifier",
- flagsp == &negflags ? "?-" : "?",
- flagsp == &negflags ? "don't " : ""
- );
- }
- }
- break;
- case KEEPCOPY_PAT_MOD: /* 'p' */
- if (flagsp == &negflags) {
- if (SIZE_ONLY)
- ckWARNreg(RExC_parse + 1,"Useless use of (?-p)");
- } else {
- *flagsp |= RXf_PMf_KEEPCOPY;
- }
- break;
- case '-':
- if (flagsp == &negflags) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- flagsp = &negflags;
- wastedflags = 0; /* reset so (?g-c) warns twice */
- break;
- case ':':
- paren = ':';
- /*FALLTHROUGH*/
- case ')':
- RExC_flags |= posflags;
- RExC_flags &= ~negflags;
- if (paren != ':') {
- oregflags |= posflags;
- oregflags &= ~negflags;
- }
- nextchar(pRExC_state);
- if (paren != ':') {
- *flagp = TRYAGAIN;
- return NULL;
- } else {
- ret = NULL;
- goto parse_rest;
- }
- /*NOTREACHED*/
- default:
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- ++RExC_parse;
- }
- }} /* one for the default block, one for the switch */
- }
- else { /* (...) */
- capturing_parens:
- parno = RExC_npar;
- RExC_npar++;
-
- ret = reganode(pRExC_state, OPEN, parno);
- if (!SIZE_ONLY ){
- if (!RExC_nestroot)
- RExC_nestroot = parno;
- if (RExC_seen & REG_SEEN_RECURSE
- && !RExC_open_parens[parno-1])
- {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting open paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ret)));
- RExC_open_parens[parno-1]= ret;
- }
- }
- Set_Node_Length(ret, 1); /* MJD */
- Set_Node_Offset(ret, RExC_parse); /* MJD */
- is_open = 1;
- }
- }
- else /* ! paren */
- ret = NULL;
-
- parse_rest:
- /* Pick up the branches, linking them together. */
- parse_start = RExC_parse; /* MJD */
- br = regbranch(pRExC_state, &flags, 1,depth+1);
-
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
-
- /* branch_len = (paren != 0); */
-
- if (br == NULL)
- return(NULL);
- if (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, BRANCHJ, br, depth+1);
- }
- else { /* MJD */
- reginsert(pRExC_state, BRANCH, br, depth+1);
- Set_Node_Length(br, paren != 0);
- Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start);
- }
- have_branch = 1;
- if (SIZE_ONLY)
- RExC_extralen += 1; /* For BRANCHJ-BRANCH. */
- }
- else if (paren == ':') {
- *flagp |= flags&SIMPLE;
- }
- if (is_open) { /* Starts with OPEN. */
- REGTAIL(pRExC_state, ret, br); /* OPEN -> first. */
- }
- else if (paren != '?') /* Not Conditional */
- ret = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- lastbr = br;
- while (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- ender = reganode(pRExC_state, LONGJMP,0);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */
- }
- if (SIZE_ONLY)
- RExC_extralen += 2; /* Account for LONGJMP. */
- nextchar(pRExC_state);
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
- br = regbranch(pRExC_state, &flags, 0, depth+1);
-
- if (br == NULL)
- return(NULL);
- REGTAIL(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */
- lastbr = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- }
-
- if (have_branch || paren != ':') {
- /* Make a closing node, and hook it on the end. */
- switch (paren) {
- case ':':
- ender = reg_node(pRExC_state, TAIL);
- break;
- case 1:
- ender = reganode(pRExC_state, CLOSE, parno);
- if (!SIZE_ONLY && RExC_seen & REG_SEEN_RECURSE) {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting close paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ender)));
- RExC_close_parens[parno-1]= ender;
- if (RExC_nestroot == parno)
- RExC_nestroot = 0;
- }
- Set_Node_Offset(ender,RExC_parse+1); /* MJD */
- Set_Node_Length(ender,1); /* MJD */
- break;
- case '<':
- case ',':
- case '=':
- case '!':
- *flagp &= ~HASWIDTH;
- /* FALL THROUGH */
- case '>':
- ender = reg_node(pRExC_state, SUCCEED);
- break;
- case 0:
- ender = reg_node(pRExC_state, END);
- if (!SIZE_ONLY) {
- assert(!RExC_opend); /* there can only be one! */
- RExC_opend = ender;
- }
- break;
- }
- REGTAIL(pRExC_state, lastbr, ender);
-
- if (have_branch && !SIZE_ONLY) {
- if (depth==1)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
-
- /* Hook the tails of the branches to the closing node. */
- for (br = ret; br; br = regnext(br)) {
- const U8 op = PL_regkind[OP(br)];
- if (op == BRANCH) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(br), ender);
- }
- else if (op == BRANCHJ) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(NEXTOPER(br)), ender);
- }
- }
- }
- }
-
- {
- const char *p;
- static const char parens[] = "=!<,>";
-
- if (paren && (p = strchr(parens, paren))) {
- U8 node = ((p - parens) % 2) ? UNLESSM : IFMATCH;
- int flag = (p - parens) > 1;
-
- if (paren == '>')
- node = SUSPEND, flag = 0;
- reginsert(pRExC_state, node,ret, depth+1);
- Set_Node_Cur_Length(ret);
- Set_Node_Offset(ret, parse_start + 1);
- ret->flags = flag;
- REGTAIL_STUDY(pRExC_state, ret, reg_node(pRExC_state, TAIL));
- }
- }
-
- /* Check for proper termination. */
- if (paren) {
- RExC_flags = oregflags;
- if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched (");
- }
- }
- else if (!paren && RExC_parse < RExC_end) {
- if (*RExC_parse == ')') {
- RExC_parse++;
- vFAIL("Unmatched )");
- }
- else
- FAIL("Junk on end of regexp"); /* "Can't happen". */
- /* NOTREACHED */
- }
- if (after_freeze)
- RExC_npar = after_freeze;
- return(ret);
-}
-
-/*
- - regbranch - one alternative of an | operator
- *
- * Implements the concatenation operator.
- */
-STATIC regnode *
-S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register regnode *chain = NULL;
- register regnode *latest;
- I32 flags = 0, c = 0;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGBRANCH;
-
- DEBUG_PARSE("brnc");
-
- if (first)
- ret = NULL;
- else {
- if (!SIZE_ONLY && RExC_extralen)
- ret = reganode(pRExC_state, BRANCHJ,0);
- else {
- ret = reg_node(pRExC_state, BRANCH);
- Set_Node_Length(ret, 1);
- }
- }
-
- if (!first && SIZE_ONLY)
- RExC_extralen += 1; /* BRANCHJ */
-
- *flagp = WORST; /* Tentatively. */
-
- RExC_parse--;
- nextchar(pRExC_state);
- while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') {
- flags &= ~TRYAGAIN;
- latest = regpiece(pRExC_state, &flags,depth+1);
- if (latest == NULL) {
- if (flags & TRYAGAIN)
- continue;
- return(NULL);
- }
- else if (ret == NULL)
- ret = latest;
- *flagp |= flags&(HASWIDTH|POSTPONED);
- if (chain == NULL) /* First piece. */
- *flagp |= flags&SPSTART;
- else {
- RExC_naughty++;
- REGTAIL(pRExC_state, chain, latest);
- }
- chain = latest;
- c++;
- }
- if (chain == NULL) { /* Loop ran zero times. */
- chain = reg_node(pRExC_state, NOTHING);
- if (ret == NULL)
- ret = chain;
- }
- if (c == 1) {
- *flagp |= flags&SIMPLE;
- }
-
- return ret;
-}
-
-/*
- - regpiece - something followed by possible [*+?]
- *
- * Note that the branching code sequences used for ? and the general cases
- * of * and + are somewhat optimized: they use the same NOTHING node as
- * both the endmarker for their branch list and the body of the last branch.
- * It might seem that this node could be dispensed with entirely, but the
- * endmarker role is not redundant.
- */
-STATIC regnode *
-S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register char op;
- register char *next;
- I32 flags;
- const char * const origparse = RExC_parse;
- I32 min;
- I32 max = REG_INFTY;
- char *parse_start;
- const char *maxpos = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPIECE;
-
- DEBUG_PARSE("piec");
-
- ret = regatom(pRExC_state, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN)
- *flagp |= TRYAGAIN;
- return(NULL);
- }
-
- op = *RExC_parse;
-
- if (op == '{' && regcurly(RExC_parse)) {
- maxpos = NULL;
- parse_start = RExC_parse; /* MJD */
- next = RExC_parse + 1;
- while (isDIGIT(*next) || *next == ',') {
- if (*next == ',') {
- if (maxpos)
- break;
- else
- maxpos = next;
- }
- next++;
- }
- if (*next == '}') { /* got one */
- if (!maxpos)
- maxpos = next;
- RExC_parse++;
- min = atoi(RExC_parse);
- if (*maxpos == ',')
- maxpos++;
- else
- maxpos = RExC_parse;
- max = atoi(maxpos);
- if (!max && *maxpos != '0')
- max = REG_INFTY; /* meaning "infinity" */
- else if (max >= REG_INFTY)
- vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1);
- RExC_parse = next;
- nextchar(pRExC_state);
-
- do_curly:
- if ((flags&SIMPLE)) {
- RExC_naughty += 2 + RExC_naughty / 2;
- reginsert(pRExC_state, CURLY, ret, depth+1);
- Set_Node_Offset(ret, parse_start+1); /* MJD */
- Set_Node_Cur_Length(ret);
- }
- else {
- regnode * const w = reg_node(pRExC_state, WHILEM);
-
- w->flags = 0;
- REGTAIL(pRExC_state, ret, w);
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, LONGJMP,ret, depth+1);
- reginsert(pRExC_state, NOTHING,ret, depth+1);
- NEXT_OFF(ret) = 3; /* Go over LONGJMP. */
- }
- reginsert(pRExC_state, CURLYX,ret, depth+1);
- /* MJD hk */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Length(ret,
- op == '{' ? (RExC_parse - parse_start) : 1);
-
- if (!SIZE_ONLY && RExC_extralen)
- NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */
- REGTAIL(pRExC_state, ret, reg_node(pRExC_state, NOTHING));
- if (SIZE_ONLY)
- RExC_whilem_seen++, RExC_extralen += 3;
- RExC_naughty += 4 + RExC_naughty; /* compound interest */
- }
- ret->flags = 0;
-
- if (min > 0)
- *flagp = WORST;
- if (max > 0)
- *flagp |= HASWIDTH;
- if (max < min)
- vFAIL("Can't do {n,m} with n > m");
- if (!SIZE_ONLY) {
- ARG1_SET(ret, (U16)min);
- ARG2_SET(ret, (U16)max);
- }
-
- goto nest_check;
- }
- }
-
- if (!ISMULT1(op)) {
- *flagp = flags;
- return(ret);
- }
-
-#if 0 /* Now runtime fix should be reliable. */
-
- /* if this is reinstated, don't forget to put this back into perldiag:
-
- =item Regexp *+ operand could be empty at {#} in regex m/%s/
-
- (F) The part of the regexp subject to either the * or + quantifier
- could match an empty string. The {#} shows in the regular
- expression about where the problem was discovered.
-
- */
-
- if (!(flags&HASWIDTH) && op != '?')
- vFAIL("Regexp *+ operand could be empty");
-#endif
-
- parse_start = RExC_parse;
- nextchar(pRExC_state);
-
- *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH);
-
- if (op == '*' && (flags&SIMPLE)) {
- reginsert(pRExC_state, STAR, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 4;
- }
- else if (op == '*') {
- min = 0;
- goto do_curly;
- }
- else if (op == '+' && (flags&SIMPLE)) {
- reginsert(pRExC_state, PLUS, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 3;
- }
- else if (op == '+') {
- min = 1;
- goto do_curly;
- }
- else if (op == '?') {
- min = 0; max = 1;
- goto do_curly;
- }
- nest_check:
- if (!SIZE_ONLY && !(flags&(HASWIDTH|POSTPONED)) && max > REG_INFTY/3) {
- ckWARN3reg(RExC_parse,
- "%.*s matches null string many times",
- (int)(RExC_parse >= origparse ? RExC_parse - origparse : 0),
- origparse);
- }
-
- if (RExC_parse < RExC_end && *RExC_parse == '?') {
- nextchar(pRExC_state);
- reginsert(pRExC_state, MINMOD, ret, depth+1);
- REGTAIL(pRExC_state, ret, ret + NODE_STEP_REGNODE);
- }
-#ifndef REG_ALLOW_MINMOD_SUSPEND
- else
-#endif
- if (RExC_parse < RExC_end && *RExC_parse == '+') {
- regnode *ender;
- nextchar(pRExC_state);
- ender = reg_node(pRExC_state, SUCCEED);
- REGTAIL(pRExC_state, ret, ender);
- reginsert(pRExC_state, SUSPEND, ret, depth+1);
- ret->flags = 0;
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, ret, ender);
- /*ret= ender;*/
- }
-
- if (RExC_parse < RExC_end && ISMULT2(RExC_parse)) {
- RExC_parse++;
- vFAIL("Nested quantifiers");
- }
-
- return(ret);
-}
-
-
-/* reg_namedseq(pRExC_state,UVp)
-
- This is expected to be called by a parser routine that has
- recognized '\N' and needs to handle the rest. RExC_parse is
- expected to point at the first char following the N at the time
- of the call.
-
- The \N may be inside (indicated by valuep not being NULL) or outside a
- character class.
-
- \N may begin either a named sequence, or if outside a character class, mean
- to match a non-newline. For non single-quoted regexes, the tokenizer has
- attempted to decide which, and in the case of a named sequence converted it
- into one of the forms: \N{} (if the sequence is null), or \N{U+c1.c2...},
- where c1... are the characters in the sequence. For single-quoted regexes,
- the tokenizer passes the \N sequence through unchanged; this code will not
- attempt to determine this nor expand those. The net effect is that if the
- beginning of the passed-in pattern isn't '{U+' or there is no '}', it
- signals that this \N occurrence means to match a non-newline.
-
- Only the \N{U+...} form should occur in a character class, for the same
- reason that '.' inside a character class means to just match a period: it
- just doesn't make sense.
-
- If valuep is non-null then it is assumed that we are parsing inside
- of a charclass definition and the first codepoint in the resolved
- string is returned via *valuep and the routine will return NULL.
- In this mode if a multichar string is returned from the charnames
- handler, a warning will be issued, and only the first char in the
- sequence will be examined. If the string returned is zero length
- then the value of *valuep is undefined and NON-NULL will
- be returned to indicate failure. (This will NOT be a valid pointer
- to a regnode.)
-
- If valuep is null then it is assumed that we are parsing normal text and a
- new EXACT node is inserted into the program containing the resolved string,
- and a pointer to the new node is returned. But if the string is zero length
- a NOTHING node is emitted instead.
-
- On success RExC_parse is set to the char following the endbrace.
- Parsing failures will generate a fatal error via vFAIL(...)
- */
-STATIC regnode *
-S_reg_namedseq(pTHX_ RExC_state_t *pRExC_state, UV *valuep, I32 *flagp)
-{
- char * endbrace; /* '}' following the name */
- regnode *ret = NULL;
-#ifdef DEBUGGING
- char* parse_start = RExC_parse - 2; /* points to the '\N' */
-#endif
- char* p;
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NAMEDSEQ;
-
- GET_RE_DEBUG_FLAGS;
-
- /* The [^\n] meaning of \N ignores spaces and comments under the /x
- * modifier. The other meaning does not */
- p = (RExC_flags & RXf_PMf_EXTENDED)
- ? regwhite( pRExC_state, RExC_parse )
- : RExC_parse;
-
- /* Disambiguate between \N meaning a named character versus \N meaning
- * [^\n]. The former is assumed when it can't be the latter. */
- if (*p != '{' || regcurly(p)) {
- RExC_parse = p;
- if (valuep) {
- /* no bare \N in a charclass */
- vFAIL("\\N in a character class must be a named character: \\N{...}");
- }
- nextchar(pRExC_state);
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- RExC_parse--;
- Set_Node_Length(ret, 1); /* MJD */
- return ret;
- }
-
- /* Here, we have decided it should be a named sequence */
-
- /* The test above made sure that the next real character is a '{', but
- * under the /x modifier, it could be separated by space (or a comment and
- * \n) and this is not allowed (for consistency with \x{...} and the
- * tokenizer handling of \N{NAME}). */
- if (*RExC_parse != '{') {
- vFAIL("Missing braces on \\N{}");
- }
-
- RExC_parse++; /* Skip past the '{' */
-
- if (! (endbrace = strchr(RExC_parse, '}')) /* no trailing brace */
- || ! (endbrace == RExC_parse /* nothing between the {} */
- || (endbrace - RExC_parse >= 2 /* U+ (bad hex is checked below */
- && strnEQ(RExC_parse, "U+", 2)))) /* for a better error msg) */
- {
- if (endbrace) RExC_parse = endbrace; /* position msg's '<--HERE' */
- vFAIL("\\N{NAME} must be resolved by the lexer");
- }
-
- if (endbrace == RExC_parse) { /* empty: \N{} */
- if (! valuep) {
- RExC_parse = endbrace + 1;
- return reg_node(pRExC_state,NOTHING);
- }
-
- if (SIZE_ONLY) {
- ckWARNreg(RExC_parse,
- "Ignoring zero length \\N{} in character class"
- );
- RExC_parse = endbrace + 1;
- }
- *valuep = 0;
- return (regnode *) &RExC_parse; /* Invalid regnode pointer */
- }
-
- RExC_utf8 = 1; /* named sequences imply Unicode semantics */
- RExC_parse += 2; /* Skip past the 'U+' */
-
- if (valuep) { /* In a bracketed char class */
- /* We only pay attention to the first char of
- multichar strings being returned. I kinda wonder
- if this makes sense as it does change the behaviour
- from earlier versions, OTOH that behaviour was broken
- as well. XXX Solution is to recharacterize as
- [rest-of-class]|multi1|multi2... */
-
- STRLEN length_of_hex;
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX
- | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0);
-
- char * endchar = strchr(RExC_parse, '.');
- if (endchar) {
- ckWARNreg(endchar, "Using just the first character returned by \\N{} in character class");
- }
- else endchar = endbrace;
-
- length_of_hex = (STRLEN)(endchar - RExC_parse);
- *valuep = grok_hex(RExC_parse, &length_of_hex, &flags, NULL);
-
- /* The tokenizer should have guaranteed validity, but it's possible to
- * bypass it by using single quoting, so check */
- if (length_of_hex == 0
- || length_of_hex != (STRLEN)(endchar - RExC_parse) )
- {
- RExC_parse += length_of_hex; /* Includes all the valid */
- RExC_parse += (RExC_orig_utf8) /* point to after 1st invalid */
- ? UTF8SKIP(RExC_parse)
- : 1;
- /* Guard against malformed utf8 */
- if (RExC_parse >= endchar) RExC_parse = endchar;
- vFAIL("Invalid hexadecimal number in \\N{U+...}");
- }
-
- RExC_parse = endbrace + 1;
- if (endchar == endbrace) return NULL;
-
- ret = (regnode *) &RExC_parse; /* Invalid regnode pointer */
- }
- else { /* Not a char class */
- char *s; /* String to put in generated EXACT node */
- STRLEN len = 0; /* Its current length */
- char *endchar; /* Points to '.' or '}' ending cur char in the input
- stream */
-
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s= STRING(ret);
-
- /* Exact nodes can hold only a U8 length's of text = 255. Loop through
- * the input which is of the form now 'c1.c2.c3...}' until find the
- * ending brace or exeed length 255. The characters that exceed this
- * limit are dropped. The limit could be relaxed should it become
- * desirable by reparsing this as (?:\N{NAME}), so could generate
- * multiple EXACT nodes, as is done for just regular input. But this
- * is primarily a named character, and not intended to be a huge long
- * string, so 255 bytes should be good enough */
- while (1) {
- STRLEN length_of_hex;
- I32 grok_flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX
- | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0);
- UV cp; /* Ord of current character */
-
- /* Code points are separated by dots. If none, there is only one
- * code point, and is terminated by the brace */
- endchar = strchr(RExC_parse, '.');
- if (! endchar) endchar = endbrace;
-
- /* The values are Unicode even on EBCDIC machines */
- length_of_hex = (STRLEN)(endchar - RExC_parse);
- cp = grok_hex(RExC_parse, &length_of_hex, &grok_flags, NULL);
- if ( length_of_hex == 0
- || length_of_hex != (STRLEN)(endchar - RExC_parse) )
- {
- RExC_parse += length_of_hex; /* Includes all the valid */
- RExC_parse += (RExC_orig_utf8) /* point to after 1st invalid */
- ? UTF8SKIP(RExC_parse)
- : 1;
- /* Guard against malformed utf8 */
- if (RExC_parse >= endchar) RExC_parse = endchar;
- vFAIL("Invalid hexadecimal number in \\N{U+...}");
- }
-
- if (! FOLD) { /* Not folding, just append to the string */
- STRLEN unilen;
-
- /* Quit before adding this character if would exceed limit */
- if (len + UNISKIP(cp) > U8_MAX) break;
-
- unilen = reguni(pRExC_state, cp, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- } else { /* Folding, output the folded equivalent */
- STRLEN foldlen,numlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
- cp = toFOLD_uni(cp, tmpbuf, &foldlen);
-
- /* Quit before exceeding size limit */
- if (len + foldlen > U8_MAX) break;
-
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen)
- {
- cp = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, cp, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- }
-
- /* Point to the beginning of the next character in the sequence. */
- RExC_parse = endchar + 1;
-
- /* Quit if no more characters */
- if (RExC_parse >= endbrace) break;
- }
-
-
- if (SIZE_ONLY) {
- if (RExC_parse < endbrace) {
- ckWARNreg(RExC_parse - 1,
- "Using just the first characters returned by \\N{}");
- }
-
- RExC_size += STR_SZ(len);
- } else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
-
- RExC_parse = endbrace + 1;
-
- *flagp |= HASWIDTH; /* Not SIMPLE, as that causes the engine to fail
- with malformed in t/re/pat_advanced.t */
- RExC_parse --;
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
- }
-
- return ret;
-}
-
-
-/*
- * reg_recode
- *
- * It returns the code point in utf8 for the value in *encp.
- * value: a code value in the source encoding
- * encp: a pointer to an Encode object
- *
- * If the result from Encode is not a single character,
- * it returns U+FFFD (Replacement character) and sets *encp to NULL.
- */
-STATIC UV
-S_reg_recode(pTHX_ const char value, SV **encp)
-{
- STRLEN numlen = 1;
- SV * const sv = newSVpvn_flags(&value, numlen, SVs_TEMP);
- const char * const s = *encp ? sv_recode_to_utf8(sv, *encp) : SvPVX(sv);
- const STRLEN newlen = SvCUR(sv);
- UV uv = UNICODE_REPLACEMENT;
-
- PERL_ARGS_ASSERT_REG_RECODE;
-
- if (newlen)
- uv = SvUTF8(sv)
- ? utf8n_to_uvchr((U8*)s, newlen, &numlen, UTF8_ALLOW_DEFAULT)
- : *(U8*)s;
-
- if (!newlen || numlen != newlen) {
- uv = UNICODE_REPLACEMENT;
- *encp = NULL;
- }
- return uv;
-}
-
-
-/*
- - regatom - the lowest level
-
- Try to identify anything special at the start of the pattern. If there
- is, then handle it as required. This may involve generating a single regop,
- such as for an assertion; or it may involve recursing, such as to
- handle a () structure.
-
- If the string doesn't start with something special then we gobble up
- as much literal text as we can.
-
- Once we have been able to handle whatever type of thing started the
- sequence, we return.
-
- Note: we have to be careful with escapes, as they can be both literal
- and special, and in the case of \10 and friends can either, depending
- on context. Specifically there are two seperate switches for handling
- escape sequences, with the one for handling literal escapes requiring
- a dummy entry for all of the special escapes that are actually handled
- by the other.
-*/
-
-STATIC regnode *
-S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret = NULL;
- I32 flags;
- char *parse_start = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_PARSE("atom");
- *flagp = WORST; /* Tentatively. */
-
- PERL_ARGS_ASSERT_REGATOM;
-
-tryagain:
- switch ((U8)*RExC_parse) {
- case '^':
- RExC_seen_zerolen++;
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MBOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SBOL);
- else
- ret = reg_node(pRExC_state, BOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '$':
- nextchar(pRExC_state);
- if (*RExC_parse)
- RExC_seen_zerolen++;
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MEOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SEOL);
- else
- ret = reg_node(pRExC_state, EOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '.':
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SANY);
- else
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '[':
- {
- char * const oregcomp_parse = ++RExC_parse;
- ret = regclass(pRExC_state,depth+1);
- if (*RExC_parse != ']') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched [");
- }
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */
- break;
- }
- case '(':
- nextchar(pRExC_state);
- ret = reg(pRExC_state, 1, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN) {
- if (RExC_parse == RExC_end) {
- /* Make parent create an empty node if needed. */
- *flagp |= TRYAGAIN;
- return(NULL);
- }
- goto tryagain;
- }
- return(NULL);
- }
- *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE|POSTPONED);
- break;
- case '|':
- case ')':
- if (flags & TRYAGAIN) {
- *flagp |= TRYAGAIN;
- return NULL;
- }
- vFAIL("Internal urp");
- /* Supposed to be caught earlier. */
- break;
- case '{':
- if (!regcurly(RExC_parse)) {
- RExC_parse++;
- goto defchar;
- }
- /* FALL THROUGH */
- case '?':
- case '+':
- case '*':
- RExC_parse++;
- vFAIL("Quantifier follows nothing");
- break;
- case 0xDF:
- case 0xC3:
- case 0xCE:
- do_foldchar:
- if (!LOC && FOLD) {
- U32 len,cp;
- len=0; /* silence a spurious compiler warning */
- if ((cp = what_len_TRICKYFOLD_safe(RExC_parse,RExC_end,UTF,len))) {
- *flagp |= HASWIDTH; /* could be SIMPLE too, but needs a handler in regexec.regrepeat */
- RExC_parse+=len-1; /* we get one from nextchar() as well. :-( */
- ret = reganode(pRExC_state, FOLDCHAR, cp);
- Set_Node_Length(ret, 1); /* MJD */
- nextchar(pRExC_state); /* kill whitespace under /x */
- return ret;
- }
- }
- goto outer_default;
- case '\\':
- /* Special Escapes
-
- This switch handles escape sequences that resolve to some kind
- of special regop and not to literal text. Escape sequnces that
- resolve to literal text are handled below in the switch marked
- "Literal Escapes".
-
- Every entry in this switch *must* have a corresponding entry
- in the literal escape switch. However, the opposite is not
- required, as the default for this switch is to jump to the
- literal text handling code.
- */
- switch ((U8)*++RExC_parse) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- goto do_foldchar;
- /* Special Escapes */
- case 'A':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, SBOL);
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'G':
- ret = reg_node(pRExC_state, GPOS);
- RExC_seen |= REG_SEEN_GPOS;
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'K':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, KEEPS);
- *flagp |= SIMPLE;
- /* XXX:dmq : disabling in-place substitution seems to
- * be necessary here to avoid cases of memory corruption, as
- * with: C<$_="x" x 80; s/x\K/y/> -- rgs
- */
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- goto finish_meta_pat;
- case 'Z':
- ret = reg_node(pRExC_state, SEOL);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'z':
- ret = reg_node(pRExC_state, EOS);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'C':
- ret = reg_node(pRExC_state, CANY);
- RExC_seen |= REG_SEEN_CANY;
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'X':
- ret = reg_node(pRExC_state, CLUMP);
- *flagp |= HASWIDTH;
- goto finish_meta_pat;
- case 'w':
- ret = reg_node(pRExC_state, (U8)(LOC ? ALNUML : ALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'W':
- ret = reg_node(pRExC_state, (U8)(LOC ? NALNUML : NALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'b':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? BOUNDL : BOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'B':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? NBOUNDL : NBOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 's':
- ret = reg_node(pRExC_state, (U8)(LOC ? SPACEL : SPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'S':
- ret = reg_node(pRExC_state, (U8)(LOC ? NSPACEL : NSPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'd':
- ret = reg_node(pRExC_state, DIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'D':
- ret = reg_node(pRExC_state, NDIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'R':
- ret = reg_node(pRExC_state, LNBREAK);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'h':
- ret = reg_node(pRExC_state, HORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'H':
- ret = reg_node(pRExC_state, NHORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'v':
- ret = reg_node(pRExC_state, VERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'V':
- ret = reg_node(pRExC_state, NVERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- finish_meta_pat:
- nextchar(pRExC_state);
- Set_Node_Length(ret, 2); /* MJD */
- break;
- case 'p':
- case 'P':
- {
- char* const oldregxend = RExC_end;
-#ifdef DEBUGGING
- char* parse_start = RExC_parse - 2;
-#endif
-
- if (RExC_parse[1] == '{') {
- /* a lovely hack--pretend we saw [\pX] instead */
- RExC_end = strchr(RExC_parse, '}');
- if (!RExC_end) {
- const U8 c = (U8)*RExC_parse;
- RExC_parse += 2;
- RExC_end = oldregxend;
- vFAIL2("Missing right brace on \\%c{}", c);
- }
- RExC_end++;
- }
- else {
- RExC_end = RExC_parse + 2;
- if (RExC_end > oldregxend)
- RExC_end = oldregxend;
- }
- RExC_parse--;
-
- ret = regclass(pRExC_state,depth+1);
-
- RExC_end = oldregxend;
- RExC_parse--;
-
- Set_Node_Offset(ret, parse_start + 2);
- Set_Node_Cur_Length(ret);
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- }
- break;
- case 'N':
- /* Handle \N and \N{NAME} here and not below because it can be
- multicharacter. join_exact() will join them up later on.
- Also this makes sure that things like /\N{BLAH}+/ and
- \N{BLAH} being multi char Just Happen. dmq*/
- ++RExC_parse;
- ret= reg_namedseq(pRExC_state, NULL, flagp);
- break;
- case 'k': /* Handle \k<NAME> and \k'NAME' */
- parse_named_seq:
- {
- char ch= RExC_parse[1];
- if (ch != '<' && ch != '\'' && ch != '{') {
- RExC_parse++;
- vFAIL2("Sequence %.2s... not terminated",parse_start);
- } else {
- /* this pretty much dupes the code for (?P=...) in reg(), if
- you change this make sure you change that */
- char* name_start = (RExC_parse += 2);
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- ch= (ch == '<') ? '>' : (ch == '{') ? '}' : '\'';
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
-
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
-
- }
- break;
- }
- case 'g':
- case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 num;
- bool isg = *RExC_parse == 'g';
- bool isrel = 0;
- bool hasbrace = 0;
- if (isg) {
- RExC_parse++;
- if (*RExC_parse == '{') {
- RExC_parse++;
- hasbrace = 1;
- }
- if (*RExC_parse == '-') {
- RExC_parse++;
- isrel = 1;
- }
- if (hasbrace && !isDIGIT(*RExC_parse)) {
- if (isrel) RExC_parse--;
- RExC_parse -= 2;
- goto parse_named_seq;
- } }
- num = atoi(RExC_parse);
- if (isg && num == 0)
- vFAIL("Reference to invalid group 0");
- if (isrel) {
- num = RExC_npar - num;
- if (num < 1)
- vFAIL("Reference to nonexistent or unclosed group");
- }
- if (!isg && num > 9 && num >= RExC_npar)
- goto defchar;
- else {
- char * const parse_start = RExC_parse - 1; /* MJD */
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (parse_start == RExC_parse - 1)
- vFAIL("Unterminated \\g... pattern");
- if (hasbrace) {
- if (*RExC_parse != '}')
- vFAIL("Unterminated \\g{...} pattern");
- RExC_parse++;
- }
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens)
- vFAIL("Reference to nonexistent group");
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? REFFL : REFF) : REF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- }
- }
- break;
- case '\0':
- if (RExC_parse >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- /* Do not generate "unrecognized" warnings here, we fall
- back into the quick-grab loop below */
- parse_start--;
- goto defchar;
- }
- break;
-
- case '#':
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if ( reg_skipcomment( pRExC_state ) )
- goto tryagain;
- }
- /* FALL THROUGH */
-
- default:
- outer_default:{
- register STRLEN len;
- register UV ender;
- register char *p;
- char *s;
- STRLEN foldlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
-
- parse_start = RExC_parse - 1;
-
- RExC_parse++;
-
- defchar:
- ender = 0;
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s = STRING(ret);
- for (len = 0, p = RExC_parse - 1;
- len < 127 && p < RExC_end;
- len++)
- {
- char * const oldp = p;
-
- if (RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- switch ((U8)*p) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case '^':
- case '$':
- case '.':
- case '[':
- case '(':
- case ')':
- case '|':
- goto loopdone;
- case '\\':
- /* Literal Escapes Switch
-
- This switch is meant to handle escape sequences that
- resolve to a literal character.
-
- Every escape sequence that represents something
- else, like an assertion or a char class, is handled
- in the switch marked 'Special Escapes' above in this
- routine, but also has an entry here as anything that
- isn't explicitly mentioned here will be treated as
- an unescaped equivalent literal.
- */
-
- switch ((U8)*++p) {
- /* These are all the special escapes. */
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case 'A': /* Start assertion */
- case 'b': case 'B': /* Word-boundary assertion*/
- case 'C': /* Single char !DANGEROUS! */
- case 'd': case 'D': /* digit class */
- case 'g': case 'G': /* generic-backref, pos assertion */
- case 'h': case 'H': /* HORIZWS */
- case 'k': case 'K': /* named backref, keep marker */
- case 'N': /* named char sequence */
- case 'p': case 'P': /* Unicode property */
- case 'R': /* LNBREAK */
- case 's': case 'S': /* space class */
- case 'v': case 'V': /* VERTWS */
- case 'w': case 'W': /* word class */
- case 'X': /* eXtended Unicode "combining character sequence" */
- case 'z': case 'Z': /* End of line/string assertion */
- --p;
- goto loopdone;
-
- /* Anything after here is an escape that resolves to a
- literal. (Except digits, which may or may not)
- */
- case 'n':
- ender = '\n';
- p++;
- break;
- case 'r':
- ender = '\r';
- p++;
- break;
- case 't':
- ender = '\t';
- p++;
- break;
- case 'f':
- ender = '\f';
- p++;
- break;
- case 'e':
- ender = ASCII_TO_NATIVE('\033');
- p++;
- break;
- case 'a':
- ender = ASCII_TO_NATIVE('\007');
- p++;
- break;
- case 'x':
- if (*++p == '{') {
- char* const e = strchr(p, '}');
-
- if (!e) {
- RExC_parse = p + 1;
- vFAIL("Missing right brace on \\x{}");
- }
- else {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = e - p - 1;
- ender = grok_hex(p + 1, &numlen, &flags, NULL);
- if (ender > 0xff)
- RExC_utf8 = 1;
- p = e + 1;
- }
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = 2;
- ender = grok_hex(p, &numlen, &flags, NULL);
- p += numlen;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- p++;
- ender = UCHARAT(p++);
- ender = toCTRL(ender);
- break;
- case '0': case '1': case '2': case '3':case '4':
- case '5': case '6': case '7': case '8':case '9':
- if (*p == '0' ||
- (isDIGIT(p[1]) && atoi(p) >= RExC_npar) ) {
- I32 flags = 0;
- STRLEN numlen = 3;
- ender = grok_oct(p, &numlen, &flags, NULL);
-
- /* An octal above 0xff is interpreted differently
- * depending on if the re is in utf8 or not. If it
- * is in utf8, the value will be itself, otherwise
- * it is interpreted as modulo 0x100. It has been
- * decided to discourage the use of octal above the
- * single-byte range. For now, warn only when
- * it ends up modulo */
- if (SIZE_ONLY && ender >= 0x100
- && ! UTF && ! PL_encoding) {
- ckWARNregdep(p, "Use of octal value above 377 is deprecated");
- }
- p += numlen;
- }
- else {
- --p;
- goto loopdone;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- recode_encoding:
- {
- SV* enc = PL_encoding;
- ender = reg_recode((const char)(U8)ender, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(p, "Invalid escape in the specified encoding");
- RExC_utf8 = 1;
- }
- break;
- case '\0':
- if (p >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- if (!SIZE_ONLY&& isALPHA(*p))
- ckWARN2reg(p + 1, "Unrecognized escape \\%c passed through", UCHARAT(p));
- goto normal_default;
- }
- break;
- default:
- normal_default:
- if (UTF8_IS_START(*p) && UTF) {
- STRLEN numlen;
- ender = utf8n_to_uvchr((U8*)p, RExC_end - p,
- &numlen, UTF8_ALLOW_DEFAULT);
- p += numlen;
- }
- else
- ender = *p++;
- break;
- }
- if ( RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- if (UTF && FOLD) {
- /* Prime the casefolded buffer. */
- ender = toFOLD_uni(ender, tmpbuf, &foldlen);
- }
- if (p < RExC_end && ISMULT2(p)) { /* Back off on ?+*. */
- if (len)
- p = oldp;
- else if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- }
- else {
- len++;
- REGC((char)ender, s++);
- }
- break;
- }
- if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- len += unilen;
- s += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break;
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- len--;
- }
- else
- REGC((char)ender, s++);
- }
- loopdone:
- RExC_parse = p - 1;
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
- {
- /* len is STRLEN which is unsigned, need to copy to signed */
- IV iv = len;
- if (iv < 0)
- vFAIL("Internal disaster");
- }
- if (len > 0)
- *flagp |= HASWIDTH;
- if (len == 1 && UNI_IS_INVARIANT(ender))
- *flagp |= SIMPLE;
-
- if (SIZE_ONLY)
- RExC_size += STR_SZ(len);
- else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- }
- break;
- }
-
- return(ret);
-}
-
-STATIC char *
-S_regwhite( RExC_state_t *pRExC_state, char *p )
-{
- const char *e = RExC_end;
-
- PERL_ARGS_ASSERT_REGWHITE;
-
- while (p < e) {
- if (isSPACE(*p))
- ++p;
- else if (*p == '#') {
- bool ended = 0;
- do {
- if (*p++ == '\n') {
- ended = 1;
- break;
- }
- } while (p < e);
- if (!ended)
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- }
- else
- break;
- }
- return p;
-}
-
-/* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]].
- Character classes ([:foo:]) can also be negated ([:^foo:]).
- Returns a named class id (ANYOF_XXX) if successful, -1 otherwise.
- Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed,
- but trigger failures because they are currently unimplemented. */
-
-#define POSIXCC_DONE(c) ((c) == ':')
-#define POSIXCC_NOTYET(c) ((c) == '=' || (c) == '.')
-#define POSIXCC(c) (POSIXCC_DONE(c) || POSIXCC_NOTYET(c))
-
-STATIC I32
-S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value)
-{
- dVAR;
- I32 namedclass = OOB_NAMEDCLASS;
-
- PERL_ARGS_ASSERT_REGPPOSIXCC;
-
- if (value == '[' && RExC_parse + 1 < RExC_end &&
- /* I smell either [: or [= or [. -- POSIX has been here, right? */
- POSIXCC(UCHARAT(RExC_parse))) {
- const char c = UCHARAT(RExC_parse);
- char* const s = RExC_parse++;
-
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != c)
- RExC_parse++;
- if (RExC_parse == RExC_end)
- /* Grandfather lone [:, [=, [. */
- RExC_parse = s;
- else {
- const char* const t = RExC_parse++; /* skip over the c */
- assert(*t == c);
-
- if (UCHARAT(RExC_parse) == ']') {
- const char *posixcc = s + 1;
- RExC_parse++; /* skip over the ending ] */
-
- if (*s == ':') {
- const I32 complement = *posixcc == '^' ? *posixcc++ : 0;
- const I32 skip = t - posixcc;
-
- /* Initially switch on the length of the name. */
- switch (skip) {
- case 4:
- if (memEQ(posixcc, "word", 4)) /* this is not POSIX, this is the Perl \w */
- namedclass = complement ? ANYOF_NALNUM : ANYOF_ALNUM;
- break;
- case 5:
- /* Names all of length 5. */
- /* alnum alpha ascii blank cntrl digit graph lower
- print punct space upper */
- /* Offset 4 gives the best switch position. */
- switch (posixcc[4]) {
- case 'a':
- if (memEQ(posixcc, "alph", 4)) /* alpha */
- namedclass = complement ? ANYOF_NALPHA : ANYOF_ALPHA;
- break;
- case 'e':
- if (memEQ(posixcc, "spac", 4)) /* space */
- namedclass = complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC;
- break;
- case 'h':
- if (memEQ(posixcc, "grap", 4)) /* graph */
- namedclass = complement ? ANYOF_NGRAPH : ANYOF_GRAPH;
- break;
- case 'i':
- if (memEQ(posixcc, "asci", 4)) /* ascii */
- namedclass = complement ? ANYOF_NASCII : ANYOF_ASCII;
- break;
- case 'k':
- if (memEQ(posixcc, "blan", 4)) /* blank */
- namedclass = complement ? ANYOF_NBLANK : ANYOF_BLANK;
- break;
- case 'l':
- if (memEQ(posixcc, "cntr", 4)) /* cntrl */
- namedclass = complement ? ANYOF_NCNTRL : ANYOF_CNTRL;
- break;
- case 'm':
- if (memEQ(posixcc, "alnu", 4)) /* alnum */
- namedclass = complement ? ANYOF_NALNUMC : ANYOF_ALNUMC;
- break;
- case 'r':
- if (memEQ(posixcc, "lowe", 4)) /* lower */
- namedclass = complement ? ANYOF_NLOWER : ANYOF_LOWER;
- else if (memEQ(posixcc, "uppe", 4)) /* upper */
- namedclass = complement ? ANYOF_NUPPER : ANYOF_UPPER;
- break;
- case 't':
- if (memEQ(posixcc, "digi", 4)) /* digit */
- namedclass = complement ? ANYOF_NDIGIT : ANYOF_DIGIT;
- else if (memEQ(posixcc, "prin", 4)) /* print */
- namedclass = complement ? ANYOF_NPRINT : ANYOF_PRINT;
- else if (memEQ(posixcc, "punc", 4)) /* punct */
- namedclass = complement ? ANYOF_NPUNCT : ANYOF_PUNCT;
- break;
- }
- break;
- case 6:
- if (memEQ(posixcc, "xdigit", 6))
- namedclass = complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT;
- break;
- }
-
- if (namedclass == OOB_NAMEDCLASS)
- Simple_vFAIL3("POSIX class [:%.*s:] unknown",
- t - s - 1, s + 1);
- assert (posixcc[skip] == ':');
- assert (posixcc[skip+1] == ']');
- } else if (!SIZE_ONLY) {
- /* [[=foo=]] and [[.foo.]] are still future. */
-
- /* adjust RExC_parse so the warning shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse) != ']')
- RExC_parse++;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- } else {
- /* Maternal grandfather:
- * "[:" ending in ":" but not in ":]" */
- RExC_parse = s;
- }
- }
- }
-
- return namedclass;
-}
-
-STATIC void
-S_checkposixcc(pTHX_ RExC_state_t *pRExC_state)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_CHECKPOSIXCC;
-
- if (POSIXCC(UCHARAT(RExC_parse))) {
- const char *s = RExC_parse;
- const char c = *s++;
-
- while (isALNUM(*s))
- s++;
- if (*s && c == *s && s[1] == ']') {
- ckWARN3reg(s+2,
- "POSIX syntax [%c %c] belongs inside character classes",
- c, c);
-
- /* [[=foo=]] and [[.foo.]] are still future. */
- if (POSIXCC_NOTYET(c)) {
- /* adjust RExC_parse so the error shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse++) != ']')
- NOOP;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- }
- }
-}
-
-
-#define _C_C_T_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_N##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '!'; \
- what = WORD; \
- break
-
-#define _C_C_T_NOLOC_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '!'; \
- what = WORD; \
- break
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define POSIX_CC_UNI_NAME(CCNAME) CCNAME
-#else
-#define POSIX_CC_UNI_NAME(CCNAME) "Posix" CCNAME
-#endif
-
-/*
- parse a class specification and produce either an ANYOF node that
- matches the pattern or if the pattern matches a single char only and
- that char is < 256 and we are case insensitive then we produce an
- EXACT node instead.
-*/
-
-STATIC regnode *
-S_regclass(pTHX_ RExC_state_t *pRExC_state, U32 depth)
-{
- dVAR;
- register UV nextvalue;
- register IV prevvalue = OOB_UNICODE;
- register IV range = 0;
- UV value = 0; /* XXX:dmq: needs to be referenceable (unfortunately) */
- register regnode *ret;
- STRLEN numlen;
- IV namedclass;
- char *rangebegin = NULL;
- bool need_class = 0;
- SV *listsv = NULL;
- UV n;
- bool optimize_invert = TRUE;
- AV* unicode_alternate = NULL;
-#ifdef EBCDIC
- UV literal_endpoint = 0;
-#endif
- UV stored = 0; /* number of chars stored in the class */
-
- regnode * const orig_emit = RExC_emit; /* Save the original RExC_emit in
- case we need to change the emitted regop to an EXACT. */
- const char * orig_parse = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCLASS;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- DEBUG_PARSE("clas");
-
- /* Assume we are going to generate an ANYOF node. */
- ret = reganode(pRExC_state, ANYOF, 0);
-
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) = 0;
-
- if (UCHARAT(RExC_parse) == '^') { /* Complement of range. */
- RExC_naughty++;
- RExC_parse++;
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) |= ANYOF_INVERT;
- }
-
- if (SIZE_ONLY) {
- RExC_size += ANYOF_SKIP;
- listsv = &PL_sv_undef; /* For code scanners: listsv always non-NULL. */
- }
- else {
- RExC_emit += ANYOF_SKIP;
- if (FOLD)
- ANYOF_FLAGS(ret) |= ANYOF_FOLD;
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_LOCALE;
- ANYOF_BITMAP_ZERO(ret);
- listsv = newSVpvs("# comment\n");
- }
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
-
- if (!SIZE_ONLY && POSIXCC(nextvalue))
- checkposixcc(pRExC_state);
-
- /* allow 1st char to be ] (allowing it to be - is dealt with later) */
- if (UCHARAT(RExC_parse) == ']')
- goto charclassloop;
-
-parseit:
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != ']') {
-
- charclassloop:
-
- namedclass = OOB_NAMEDCLASS; /* initialize as illegal */
-
- if (!range)
- rangebegin = RExC_parse;
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
- if (value == '[' && POSIXCC(nextvalue))
- namedclass = regpposixcc(pRExC_state, value);
- else if (value == '\\') {
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
- /* Some compilers cannot handle switching on 64-bit integer
- * values, therefore value cannot be an UV. Yes, this will
- * be a problem later if we want switch on Unicode.
- * A similar issue a little bit later when switching on
- * namedclass. --jhi */
- switch ((I32)value) {
- case 'w': namedclass = ANYOF_ALNUM; break;
- case 'W': namedclass = ANYOF_NALNUM; break;
- case 's': namedclass = ANYOF_SPACE; break;
- case 'S': namedclass = ANYOF_NSPACE; break;
- case 'd': namedclass = ANYOF_DIGIT; break;
- case 'D': namedclass = ANYOF_NDIGIT; break;
- case 'v': namedclass = ANYOF_VERTWS; break;
- case 'V': namedclass = ANYOF_NVERTWS; break;
- case 'h': namedclass = ANYOF_HORIZWS; break;
- case 'H': namedclass = ANYOF_NHORIZWS; break;
- case 'N': /* Handle \N{NAME} in class */
- {
- /* We only pay attention to the first char of
- multichar strings being returned. I kinda wonder
- if this makes sense as it does change the behaviour
- from earlier versions, OTOH that behaviour was broken
- as well. */
- UV v; /* value is register so we cant & it /grrr */
- if (reg_namedseq(pRExC_state, &v, NULL)) {
- goto parseit;
- }
- value= v;
- }
- break;
- case 'p':
- case 'P':
- {
- char *e;
- if (RExC_parse >= RExC_end)
- vFAIL2("Empty \\%c{}", (U8)value);
- if (*RExC_parse == '{') {
- const U8 c = (U8)value;
- e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL2("Missing right brace on \\%c{}", c);
- while (isSPACE(UCHARAT(RExC_parse)))
- RExC_parse++;
- if (e == RExC_parse)
- vFAIL2("Empty \\%c{}", c);
- n = e - RExC_parse;
- while (isSPACE(UCHARAT(RExC_parse + n - 1)))
- n--;
- }
- else {
- e = RExC_parse;
- n = 1;
- }
- if (!SIZE_ONLY) {
- if (UCHARAT(RExC_parse) == '^') {
- RExC_parse++;
- n--;
- value = value == 'p' ? 'P' : 'p'; /* toggle */
- while (isSPACE(UCHARAT(RExC_parse))) {
- RExC_parse++;
- n--;
- }
- }
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::%.*s\n",
- (value=='p' ? '+' : '!'), (int)n, RExC_parse);
- }
- RExC_parse = e + 1;
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- namedclass = ANYOF_MAX; /* no official name, but it's named */
- }
- break;
- case 'n': value = '\n'; break;
- case 'r': value = '\r'; break;
- case 't': value = '\t'; break;
- case 'f': value = '\f'; break;
- case 'b': value = '\b'; break;
- case 'e': value = ASCII_TO_NATIVE('\033');break;
- case 'a': value = ASCII_TO_NATIVE('\007');break;
- case 'x':
- if (*RExC_parse == '{') {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- char * const e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL("Missing right brace on \\x{}");
-
- numlen = e - RExC_parse;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse = e + 1;
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- numlen = 2;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- }
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- value = UCHARAT(RExC_parse++);
- value = toCTRL(value);
- break;
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 flags = 0;
- numlen = 3;
- value = grok_oct(--RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- }
- recode_encoding:
- {
- SV* enc = PL_encoding;
- value = reg_recode((const char)(U8)value, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(RExC_parse,
- "Invalid escape in the specified encoding");
- break;
- }
- default:
- if (!SIZE_ONLY && isALPHA(value))
- ckWARN2reg(RExC_parse,
- "Unrecognized escape \\%c in character class passed through",
- (int)value);
- break;
- }
- } /* end of \blah */
-#ifdef EBCDIC
- else
- literal_endpoint++;
-#endif
-
- if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */
-
- if (!SIZE_ONLY && !need_class)
- ANYOF_CLASS_ZERO(ret);
-
- need_class = 1;
-
- /* a bad range like a-\d, a-[:digit:] ? */
- if (range) {
- if (!SIZE_ONLY) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- ckWARN4reg(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
-
- if (prevvalue < 256) {
- ANYOF_BITMAP_SET(ret, prevvalue);
- ANYOF_BITMAP_SET(ret, '-');
- }
- else {
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-');
- }
- }
-
- range = 0; /* this was not a true range */
- }
-
-
-
- if (!SIZE_ONLY) {
- const char *what = NULL;
- char yesno = 0;
-
- if (namedclass > OOB_NAMEDCLASS)
- optimize_invert = FALSE;
- /* Possible truncation here but in some 64-bit environments
- * the compiler gets heartburn about switch on 64-bit values.
- * A similar issue a little earlier when switching on value.
- * --jhi */
- switch ((I32)namedclass) {
-
- case _C_C_T_(ALNUMC, isALNUMC(value), POSIX_CC_UNI_NAME("Alnum"));
- case _C_C_T_(ALPHA, isALPHA(value), POSIX_CC_UNI_NAME("Alpha"));
- case _C_C_T_(BLANK, isBLANK(value), POSIX_CC_UNI_NAME("Blank"));
- case _C_C_T_(CNTRL, isCNTRL(value), POSIX_CC_UNI_NAME("Cntrl"));
- case _C_C_T_(GRAPH, isGRAPH(value), POSIX_CC_UNI_NAME("Graph"));
- case _C_C_T_(LOWER, isLOWER(value), POSIX_CC_UNI_NAME("Lower"));
- case _C_C_T_(PRINT, isPRINT(value), POSIX_CC_UNI_NAME("Print"));
- case _C_C_T_(PSXSPC, isPSXSPC(value), POSIX_CC_UNI_NAME("Space"));
- case _C_C_T_(PUNCT, isPUNCT(value), POSIX_CC_UNI_NAME("Punct"));
- case _C_C_T_(UPPER, isUPPER(value), POSIX_CC_UNI_NAME("Upper"));
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
- case _C_C_T_(ALNUM, isALNUM(value), "Word");
- case _C_C_T_(SPACE, isSPACE(value), "SpacePerl");
-#else
- case _C_C_T_(SPACE, isSPACE(value), "PerlSpace");
- case _C_C_T_(ALNUM, isALNUM(value), "PerlWord");
-#endif
- case _C_C_T_(XDIGIT, isXDIGIT(value), "XDigit");
- case _C_C_T_NOLOC_(VERTWS, is_VERTWS_latin1(&value), "VertSpace");
- case _C_C_T_NOLOC_(HORIZWS, is_HORIZWS_latin1(&value), "HorizSpace");
- case ANYOF_ASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_ASCII);
- else {
-#ifndef EBCDIC
- for (value = 0; value < 128; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '+';
- what = "ASCII";
- break;
- case ANYOF_NASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NASCII);
- else {
-#ifndef EBCDIC
- for (value = 128; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (!isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '!';
- what = "ASCII";
- break;
- case ANYOF_DIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_DIGIT);
- else {
- /* consecutive digits assumed */
- for (value = '0'; value <= '9'; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '+';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_NDIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NDIGIT);
- else {
- /* consecutive digits assumed */
- for (value = 0; value < '0'; value++)
- ANYOF_BITMAP_SET(ret, value);
- for (value = '9' + 1; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '!';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_MAX:
- /* this is to handle \p and \P */
- break;
- default:
- vFAIL("Invalid [::] class");
- break;
- }
- if (what) {
- /* Strings such as "+utf8::isWord\n" */
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::Is%s\n", yesno, what);
- }
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_CLASS;
- continue;
- }
- } /* end of namedclass \blah */
-
- if (range) {
- if (prevvalue > (IV)value) /* b-a */ {
- const int w = RExC_parse - rangebegin;
- Simple_vFAIL4("Invalid [] range \"%*.*s\"", w, w, rangebegin);
- range = 0; /* not a valid range */
- }
- }
- else {
- prevvalue = value; /* save the beginning of the range */
- if (*RExC_parse == '-' && RExC_parse+1 < RExC_end &&
- RExC_parse[1] != ']') {
- RExC_parse++;
-
- /* a bad range like \w-, [:word:]- ? */
- if (namedclass > OOB_NAMEDCLASS) {
- if (ckWARN(WARN_REGEXP)) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- vWARN4(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
- }
- if (!SIZE_ONLY)
- ANYOF_BITMAP_SET(ret, '-');
- } else
- range = 1; /* yeah, it's a range! */
- continue; /* but do it the next time */
- }
- }
-
- /* now is the next time */
- /*stored += (value - prevvalue + 1);*/
- if (!SIZE_ONLY) {
- if (prevvalue < 256) {
- const IV ceilvalue = value < 256 ? value : 255;
- IV i;
-#ifdef EBCDIC
- /* In EBCDIC [\x89-\x91] should include
- * the \x8e but [i-j] should not. */
- if (literal_endpoint == 2 &&
- ((isLOWER(prevvalue) && isLOWER(ceilvalue)) ||
- (isUPPER(prevvalue) && isUPPER(ceilvalue))))
- {
- if (isLOWER(prevvalue)) {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isLOWER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- } else {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isUPPER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- else
-#endif
- for (i = prevvalue; i <= ceilvalue; i++) {
- if (!ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- if (value > 255 || UTF) {
- const UV prevnatvalue = NATIVE_TO_UNI(prevvalue);
- const UV natvalue = NATIVE_TO_UNI(value);
- stored+=2; /* can't optimize this class */
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- if (prevnatvalue < natvalue) { /* what about > ? */
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n",
- prevnatvalue, natvalue);
- }
- else if (prevnatvalue == natvalue) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", natvalue);
- if (FOLD) {
- U8 foldbuf[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const UV f = to_uni_fold(natvalue, foldbuf, &foldlen);
-
-#ifdef EBCDIC /* RD t/uni/fold ff and 6b */
- if (RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xDF || f == 0x92)) {
- f = NATIVE_TO_UNI(f);
- }
-#endif
- /* If folding and foldable and a single
- * character, insert also the folded version
- * to the charclass. */
- if (f != value) {
-#ifdef EBCDIC /* RD tunifold ligatures s,t fb05, fb06 */
- if ((RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xA2 &&
- (value == 0xFB05 || value == 0xFB06))) ?
- foldlen == ((STRLEN)UNISKIP(f) - 1) :
- foldlen == (STRLEN)UNISKIP(f) )
-#else
- if (foldlen == (STRLEN)UNISKIP(f))
-#endif
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n", f);
- else {
- /* Any multicharacter foldings
- * require the following transform:
- * [ABCDEF] -> (?:[ABCabcDEFd]|pq|rst)
- * where E folds into "pq" and F folds
- * into "rst", all other characters
- * fold to single characters. We save
- * away these multicharacter foldings,
- * to be later saved as part of the
- * additional "s" data. */
- SV *sv;
-
- if (!unicode_alternate)
- unicode_alternate = newAV();
- sv = newSVpvn_utf8((char*)foldbuf, foldlen,
- TRUE);
- av_push(unicode_alternate, sv);
- }
- }
-
- /* If folding and the value is one of the Greek
- * sigmas insert a few more sigmas to make the
- * folding rules of the sigmas to work right.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (literal or EXACTF cases) are handled
- * during runtime in regexec.c:S_find_byclass(). */
- if (value == UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA);
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- else if (value == UNICODE_GREEK_CAPITAL_LETTER_SIGMA)
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- }
- }
-#ifdef EBCDIC
- literal_endpoint = 0;
-#endif
- }
-
- range = 0; /* this range (if it was one) is done now */
- }
-
- if (need_class) {
- ANYOF_FLAGS(ret) |= ANYOF_LARGE;
- if (SIZE_ONLY)
- RExC_size += ANYOF_CLASS_ADD_SKIP;
- else
- RExC_emit += ANYOF_CLASS_ADD_SKIP;
- }
-
-
- if (SIZE_ONLY)
- return ret;
- /****** !SIZE_ONLY AFTER HERE *********/
-
- if( stored == 1 && (value < 128 || (value < 256 && !UTF))
- && !( ANYOF_FLAGS(ret) & ( ANYOF_FLAGS_ALL ^ ANYOF_FOLD ) )
- ) {
- /* optimize single char class to an EXACT node
- but *only* when its not a UTF/high char */
- const char * cur_parse= RExC_parse;
- RExC_emit = (regnode *)orig_emit;
- RExC_parse = (char *)orig_parse;
- ret = reg_node(pRExC_state,
- (U8)((ANYOF_FLAGS(ret) & ANYOF_FOLD) ? EXACTF : EXACT));
- RExC_parse = (char *)cur_parse;
- *STRING(ret)= (char)value;
- STR_LEN(ret)= 1;
- RExC_emit += STR_SZ(1);
- SvREFCNT_dec(listsv);
- return ret;
- }
- /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */
- if ( /* If the only flag is folding (plus possibly inversion). */
- ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD)
- ) {
- for (value = 0; value < 256; ++value) {
- if (ANYOF_BITMAP_TEST(ret, value)) {
- UV fold = PL_fold[value];
-
- if (fold != value)
- ANYOF_BITMAP_SET(ret, fold);
- }
- }
- ANYOF_FLAGS(ret) &= ~ANYOF_FOLD;
- }
-
- /* optimize inverted simple patterns (e.g. [^a-z]) */
- if (optimize_invert &&
- /* If the only flag is inversion. */
- (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) {
- for (value = 0; value < ANYOF_BITMAP_SIZE; ++value)
- ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL;
- ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL;
- }
- {
- AV * const av = newAV();
- SV *rv;
- /* The 0th element stores the character class description
- * in its textual form: used later (regexec.c:Perl_regclass_swash())
- * to initialize the appropriate swash (which gets stored in
- * the 1st element), and also useful for dumping the regnode.
- * The 2nd element stores the multicharacter foldings,
- * used later (regexec.c:S_reginclass()). */
- av_store(av, 0, listsv);
- av_store(av, 1, NULL);
- av_store(av, 2, MUTABLE_SV(unicode_alternate));
- rv = newRV_noinc(MUTABLE_SV(av));
- n = add_data(pRExC_state, 1, "s");
- RExC_rxi->data->data[n] = (void*)rv;
- ARG_SET(ret, n);
- }
- return ret;
-}
-#undef _C_C_T_
-
-
-/* reg_skipcomment()
-
- Absorbs an /x style # comments from the input stream.
- Returns true if there is more text remaining in the stream.
- Will set the REG_SEEN_RUN_ON_COMMENT flag if the comment
- terminates the pattern without including a newline.
-
- Note its the callers responsibility to ensure that we are
- actually in /x mode
-
-*/
-
-STATIC bool
-S_reg_skipcomment(pTHX_ RExC_state_t *pRExC_state)
-{
- bool ended = 0;
-
- PERL_ARGS_ASSERT_REG_SKIPCOMMENT;
-
- while (RExC_parse < RExC_end)
- if (*RExC_parse++ == '\n') {
- ended = 1;
- break;
- }
- if (!ended) {
- /* we ran off the end of the pattern without ending
- the comment, so we have to add an \n when wrapping */
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- return 0;
- } else
- return 1;
-}
-
-/* nextchar()
-
- Advance that parse position, and optionall absorbs
- "whitespace" from the inputstream.
-
- Without /x "whitespace" means (?#...) style comments only,
- with /x this means (?#...) and # comments and whitespace proper.
-
- Returns the RExC_parse point from BEFORE the scan occurs.
-
- This is the /x friendly way of saying RExC_parse++.
-*/
-
-STATIC char*
-S_nextchar(pTHX_ RExC_state_t *pRExC_state)
-{
- char* const retval = RExC_parse++;
-
- PERL_ARGS_ASSERT_NEXTCHAR;
-
- for (;;) {
- if (*RExC_parse == '(' && RExC_parse[1] == '?' &&
- RExC_parse[2] == '#') {
- while (*RExC_parse != ')') {
- if (RExC_parse == RExC_end)
- FAIL("Sequence (?#... not terminated");
- RExC_parse++;
- }
- RExC_parse++;
- continue;
- }
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if (isSPACE(*RExC_parse)) {
- RExC_parse++;
- continue;
- }
- else if (*RExC_parse == '#') {
- if ( reg_skipcomment( pRExC_state ) )
- continue;
- }
- }
- return retval;
- }
-}
-
-/*
-- reg_node - emit a node
-*/
-STATIC regnode * /* Location. */
-S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 1;
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE(ptr, op);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s:%d: (op %s) %s %"UVuf" (len %"UVuf") (max %"UVuf").\n",
- "reg_node", __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(RExC_emit, RExC_parse + (op == END));
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reganode - emit a node with an argument
-*/
-STATIC regnode * /* Location. */
-S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGANODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 2;
- /*
- We can't do this:
-
- assert(2==regarglen[op]+1);
-
- Anything larger than this has to allocate the extra amount.
- If we changed this to be:
-
- RExC_size += (1 + regarglen[op]);
-
- then it wouldn't matter. Its not clear what side effect
- might come from that so its not done so far.
- -- dmq
- */
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE_ARG(ptr, op, arg);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reganode",
- __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] ?
- "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Cur_Node_Offset;
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reguni - emit (if appropriate) a Unicode character
-*/
-STATIC STRLEN
-S_reguni(pTHX_ const RExC_state_t *pRExC_state, UV uv, char* s)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGUNI;
-
- return SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s);
-}
-
-/*
-- reginsert - insert an operator in front of already-emitted operand
-*
-* Means relocating the operand.
-*/
-STATIC void
-S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd, U32 depth)
-{
- dVAR;
- register regnode *src;
- register regnode *dst;
- register regnode *place;
- const int offset = regarglen[(U8)op];
- const int size = NODE_STEP_REGNODE + offset;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGINSERT;
- PERL_UNUSED_ARG(depth);
-/* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */
- DEBUG_PARSE_FMT("inst"," - %s",PL_reg_name[op]);
- if (SIZE_ONLY) {
- RExC_size += size;
- return;
- }
-
- src = RExC_emit;
- RExC_emit += size;
- dst = RExC_emit;
- if (RExC_open_parens) {
- int paren;
- /*DEBUG_PARSE_FMT("inst"," - %"IVdf, (IV)RExC_npar);*/
- for ( paren=0 ; paren < RExC_npar ; paren++ ) {
- if ( RExC_open_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("open"," - %d",size);*/
- RExC_open_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("open"," - %s","ok");*/
- }
- if ( RExC_close_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("close"," - %d",size);*/
- RExC_close_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("close"," - %s","ok");*/
- }
- }
- }
-
- while (src > opnd) {
- StructCopy(--src, --dst, regnode);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD 20010112 */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s copy %"UVuf" -> %"UVuf" (max %"UVuf").\n",
- "reg_insert",
- __LINE__,
- PL_reg_name[op],
- (UV)(dst - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(src - RExC_emit_start),
- (UV)(dst - RExC_emit_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src));
- Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src));
- }
-#endif
- }
-
-
- place = opnd; /* Op node, where operand used to be. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reginsert",
- __LINE__,
- PL_reg_name[op],
- (UV)(place - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(place - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(place, RExC_parse);
- Set_Node_Length(place, 1);
- }
-#endif
- src = NEXTOPER(place);
- FILL_ADVANCE_NODE(place, op);
- Zero(src, offset, regnode);
-}
-
-/*
-- regtail - set the next-pointer at the end of a node chain of p to val.
-- SEE ALSO: regtail_study
-*/
-/* TODO: All three parms should be const */
-STATIC void
-S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- if (SIZE_ONLY)
- return;
-
- /* Find last node. */
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tail" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) %s %s\n",
- SvPV_nolen_const(mysv), REG_NODE_NUM(scan),
- (temp == NULL ? "->" : ""),
- (temp == NULL ? PL_reg_name[OP(val)] : "")
- );
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
-
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-}
-
-#ifdef DEBUGGING
-/*
-- regtail_study - set the next-pointer at the end of a node chain of p to val.
-- Look for optimizable sequences at the same time.
-- currently only looks for EXACT chains.
-
-This is expermental code. The idea is to use this routine to perform
-in place optimizations on branches and groups as they are constructed,
-with the long term intention of removing optimization from study_chunk so
-that it is purely analytical.
-
-Currently only used when in DEBUG mode. The macro REGTAIL_STUDY() is used
-to control which is which.
-
-*/
-/* TODO: All four parms should be const */
-
-STATIC U8
-S_regtail_study(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- U8 exact = PSEUDO;
-#ifdef EXPERIMENTAL_INPLACESCAN
- I32 min = 0;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL_STUDY;
-
-
- if (SIZE_ONLY)
- return exact;
-
- /* Find last node. */
-
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (PL_regkind[OP(scan)] == EXACT)
- if (join_exact(pRExC_state,scan,&min,1,val,depth+1))
- return EXACT;
-#endif
- if ( exact ) {
- switch (OP(scan)) {
- case EXACT:
- case EXACTF:
- case EXACTFL:
- if( exact == PSEUDO )
- exact= OP(scan);
- else if ( exact != OP(scan) )
- exact= 0;
- case NOTHING:
- break;
- default:
- exact= 0;
- }
- }
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tsdy" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) -> %s\n",
- SvPV_nolen_const(mysv),
- REG_NODE_NUM(scan),
- PL_reg_name[exact]);
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
- DEBUG_PARSE_r({
- SV * const mysv_val=sv_newmortal();
- DEBUG_PARSE_MSG("");
- regprop(RExC_rx, mysv_val, val);
- PerlIO_printf(Perl_debug_log, "~ attach to %s (%"IVdf") offset to %"IVdf"\n",
- SvPV_nolen_const(mysv_val),
- (IV)REG_NODE_NUM(val),
- (IV)(val - scan)
- );
- });
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-
- return exact;
-}
-#endif
-
-/*
- - regcurly - a little FSA that accepts {\d+,?\d*}
- */
-I32
-Perl_regcurly(register const char *s)
-{
- PERL_ARGS_ASSERT_REGCURLY;
-
- if (*s++ != '{')
- return FALSE;
- if (!isDIGIT(*s))
- return FALSE;
- while (isDIGIT(*s))
- s++;
- if (*s == ',')
- s++;
- while (isDIGIT(*s))
- s++;
- if (*s != '}')
- return FALSE;
- return TRUE;
-}
-
-
-/*
- - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form
- */
-#ifdef DEBUGGING
-static void
-S_regdump_extflags(pTHX_ const char *lead, const U32 flags)
-{
- int bit;
- int set=0;
-
- for (bit=0; bit<32; bit++) {
- if (flags & (1<<bit)) {
- if (!set++ && lead)
- PerlIO_printf(Perl_debug_log, "%s",lead);
- PerlIO_printf(Perl_debug_log, "%s ",PL_reg_extflags_name[bit]);
- }
- }
- if (lead) {
- if (set)
- PerlIO_printf(Perl_debug_log, "\n");
- else
- PerlIO_printf(Perl_debug_log, "%s[none-set]\n",lead);
- }
-}
-#endif
-
-void
-Perl_regdump(pTHX_ const regexp *r)
-{
-#ifdef DEBUGGING
- dVAR;
- SV * const sv = sv_newmortal();
- SV *dsv= sv_newmortal();
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGDUMP;
-
- (void)dumpuntil(r, ri->program, ri->program + 1, NULL, NULL, sv, 0, 0);
-
- /* Header fields of interest. */
- if (r->anchored_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->anchored_substr),
- RE_SV_DUMPLEN(r->anchored_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_substr),
- (IV)r->anchored_offset);
- } else if (r->anchored_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->anchored_utf8),
- RE_SV_DUMPLEN(r->anchored_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored utf8 %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_utf8),
- (IV)r->anchored_offset);
- }
- if (r->float_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->float_substr),
- RE_SV_DUMPLEN(r->float_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "floating %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_substr),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- } else if (r->float_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->float_utf8),
- RE_SV_DUMPLEN(r->float_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "floating utf8 %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_utf8),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- }
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log,
- (const char *)
- (r->check_substr == r->float_substr
- && r->check_utf8 == r->float_utf8
- ? "(checking floating" : "(checking anchored"));
- if (r->extflags & RXf_NOSCAN)
- PerlIO_printf(Perl_debug_log, " noscan");
- if (r->extflags & RXf_CHECK_ALL)
- PerlIO_printf(Perl_debug_log, " isall");
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log, ") ");
-
- if (ri->regstclass) {
- regprop(r, sv, ri->regstclass);
- PerlIO_printf(Perl_debug_log, "stclass %s ", SvPVX_const(sv));
- }
- if (r->extflags & RXf_ANCH) {
- PerlIO_printf(Perl_debug_log, "anchored");
- if (r->extflags & RXf_ANCH_BOL)
- PerlIO_printf(Perl_debug_log, "(BOL)");
- if (r->extflags & RXf_ANCH_MBOL)
- PerlIO_printf(Perl_debug_log, "(MBOL)");
- if (r->extflags & RXf_ANCH_SBOL)
- PerlIO_printf(Perl_debug_log, "(SBOL)");
- if (r->extflags & RXf_ANCH_GPOS)
- PerlIO_printf(Perl_debug_log, "(GPOS)");
- PerlIO_putc(Perl_debug_log, ' ');
- }
- if (r->extflags & RXf_GPOS_SEEN)
- PerlIO_printf(Perl_debug_log, "GPOS:%"UVuf" ", (UV)r->gofs);
- if (r->intflags & PREGf_SKIP)
- PerlIO_printf(Perl_debug_log, "plus ");
- if (r->intflags & PREGf_IMPLICIT)
- PerlIO_printf(Perl_debug_log, "implicit ");
- PerlIO_printf(Perl_debug_log, "minlen %"IVdf" ", (IV)r->minlen);
- if (r->extflags & RXf_EVAL_SEEN)
- PerlIO_printf(Perl_debug_log, "with eval ");
- PerlIO_printf(Perl_debug_log, "\n");
- DEBUG_FLAGS_r(regdump_extflags("r->extflags: ",r->extflags));
-#else
- PERL_ARGS_ASSERT_REGDUMP;
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(r);
-#endif /* DEBUGGING */
-}
-
-/*
-- regprop - printable representation of opcode
-*/
-#define EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags) \
-STMT_START { \
- if (do_sep) { \
- Perl_sv_catpvf(aTHX_ sv,"%s][%s",PL_colors[1],PL_colors[0]); \
- if (flags & ANYOF_INVERT) \
- /*make sure the invert info is in each */ \
- sv_catpvs(sv, "^"); \
- do_sep = 0; \
- } \
-} STMT_END
-
-void
-Perl_regprop(pTHX_ const regexp *prog, SV *sv, const regnode *o)
-{
-#ifdef DEBUGGING
- dVAR;
- register int k;
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPROP;
-
- sv_setpvs(sv, "");
-
- if (OP(o) > REGNODE_MAX) /* regnode.type is unsigned */
- /* It would be nice to FAIL() here, but this may be called from
- regexec.c, and it would be hard to supply pRExC_state. */
- Perl_croak(aTHX_ "Corrupted regexp opcode %d > %d", (int)OP(o), (int)REGNODE_MAX);
- sv_catpv(sv, PL_reg_name[OP(o)]); /* Take off const! */
-
- k = PL_regkind[OP(o)];
-
- if (k == EXACT) {
- sv_catpvs(sv, " ");
- /* Using is_utf8_string() (via PERL_PV_UNI_DETECT)
- * is a crude hack but it may be the best for now since
- * we have no flag "this EXACTish node was UTF-8"
- * --jhi */
- pv_pretty(sv, STRING(o), STR_LEN(o), 60, PL_colors[0], PL_colors[1],
- PERL_PV_ESCAPE_UNI_DETECT |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT |
- PERL_PV_PRETTY_NOCLEAR
- );
- } else if (k == TRIE) {
- /* print the details of the trie in dumpuntil instead, as
- * progi->data isn't available here */
- const char op = OP(o);
- const U32 n = ARG(o);
- const reg_ac_data * const ac = IS_TRIE_AC(op) ?
- (reg_ac_data *)progi->data->data[n] :
- NULL;
- const reg_trie_data * const trie
- = (reg_trie_data*)progi->data->data[!IS_TRIE_AC(op) ? n : ac->trie];
-
- Perl_sv_catpvf(aTHX_ sv, "-%s",PL_reg_name[o->flags]);
- DEBUG_TRIE_COMPILE_r(
- Perl_sv_catpvf(aTHX_ sv,
- "<S:%"UVuf"/%"IVdf" W:%"UVuf" L:%"UVuf"/%"UVuf" C:%"UVuf"/%"UVuf">",
- (UV)trie->startstate,
- (IV)trie->statecount-1, /* -1 because of the unused 0 element */
- (UV)trie->wordcount,
- (UV)trie->minlen,
- (UV)trie->maxlen,
- (UV)TRIE_CHARCOUNT(trie),
- (UV)trie->uniquecharcount
- )
- );
- if ( IS_ANYOF_TRIE(op) || trie->bitmap ) {
- int i;
- int rangestart = -1;
- U8* bitmap = IS_ANYOF_TRIE(op) ? (U8*)ANYOF_BITMAP(o) : (U8*)TRIE_BITMAP(trie);
- sv_catpvs(sv, "[");
- for (i = 0; i <= 256; i++) {
- if (i < 256 && BITMAP_TEST(bitmap,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- rangestart = -1;
- }
- }
- sv_catpvs(sv, "]");
- }
-
- } else if (k == CURLY) {
- if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */
- Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o));
- }
- else if (k == WHILEM && o->flags) /* Ordinal/of */
- Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4);
- else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP || OP(o)==ACCEPT) {
- Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */
- if ( RXp_PAREN_NAMES(prog) ) {
- if ( k != REF || OP(o) < NREF) {
- AV *list= MUTABLE_AV(progi->data->data[progi->name_list_idx]);
- SV **name= av_fetch(list, ARG(o), 0 );
- if (name)
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- else {
- AV *list= MUTABLE_AV(progi->data->data[ progi->name_list_idx ]);
- SV *sv_dat= MUTABLE_SV(progi->data->data[ ARG( o ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
- SV **name= av_fetch(list, nums[0], 0 );
- I32 n;
- if (name) {
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- Perl_sv_catpvf(aTHX_ sv, "%s%"IVdf,
- (n ? "," : ""), (IV)nums[n]);
- }
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- }
- }
- } else if (k == GOSUB)
- Perl_sv_catpvf(aTHX_ sv, "%d[%+d]", (int)ARG(o),(int)ARG2L(o)); /* Paren and offset */
- else if (k == VERB) {
- if (!o->flags)
- Perl_sv_catpvf(aTHX_ sv, ":%"SVf,
- SVfARG((MUTABLE_SV(progi->data->data[ ARG( o ) ]))));
- } else if (k == LOGICAL)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */
- else if (k == FOLDCHAR)
- Perl_sv_catpvf(aTHX_ sv, "[0x%"UVXf"]", PTR2UV(ARG(o)) );
- else if (k == ANYOF) {
- int i, rangestart = -1;
- const U8 flags = ANYOF_FLAGS(o);
- int do_sep = 0;
-
- /* Should be synchronized with * ANYOF_ #xdefines in regcomp.h */
- static const char * const anyofs[] = {
- "\\w",
- "\\W",
- "\\s",
- "\\S",
- "\\d",
- "\\D",
- "[:alnum:]",
- "[:^alnum:]",
- "[:alpha:]",
- "[:^alpha:]",
- "[:ascii:]",
- "[:^ascii:]",
- "[:cntrl:]",
- "[:^cntrl:]",
- "[:graph:]",
- "[:^graph:]",
- "[:lower:]",
- "[:^lower:]",
- "[:print:]",
- "[:^print:]",
- "[:punct:]",
- "[:^punct:]",
- "[:upper:]",
- "[:^upper:]",
- "[:xdigit:]",
- "[:^xdigit:]",
- "[:space:]",
- "[:^space:]",
- "[:blank:]",
- "[:^blank:]"
- };
-
- if (flags & ANYOF_LOCALE)
- sv_catpvs(sv, "{loc}");
- if (flags & ANYOF_FOLD)
- sv_catpvs(sv, "{i}");
- Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]);
- if (flags & ANYOF_INVERT)
- sv_catpvs(sv, "^");
-
- /* output what the standard cp 0-255 bitmap matches */
- for (i = 0; i <= 256; i++) {
- if (i < 256 && ANYOF_BITMAP_TEST(o,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- do_sep = 1;
- rangestart = -1;
- }
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
- /* output any special charclass tests (used mostly under use locale) */
- if (o->flags & ANYOF_CLASS)
- for (i = 0; i < (int)(sizeof(anyofs)/sizeof(char*)); i++)
- if (ANYOF_CLASS_TEST(o,i)) {
- sv_catpv(sv, anyofs[i]);
- do_sep = 1;
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
-
- /* output information about the unicode matching */
- if (flags & ANYOF_UNICODE)
- sv_catpvs(sv, "{unicode}");
- else if (flags & ANYOF_UNICODE_ALL)
- sv_catpvs(sv, "{unicode_all}");
-
- {
- SV *lv;
- SV * const sw = regclass_swash(prog, o, FALSE, &lv, 0);
-
- if (lv) {
- if (sw) {
- U8 s[UTF8_MAXBYTES_CASE+1];
-
- for (i = 0; i <= 256; i++) { /* just the first 256 */
- uvchr_to_utf8(s, i);
-
- if (i < 256 && swash_fetch(sw, s, TRUE)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++) {
- const U8 * const e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for(p = s; p < e; p++)
- put_byte(sv, *p);
- }
- else {
- const U8 *e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- sv_catpvs(sv, "-");
- e = uvchr_to_utf8(s, i-1);
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- }
- rangestart = -1;
- }
- }
-
- sv_catpvs(sv, "..."); /* et cetera */
- }
-
- {
- char *s = savesvpv(lv);
- char * const origs = s;
-
- while (*s && *s != '\n')
- s++;
-
- if (*s == '\n') {
- const char * const t = ++s;
-
- while (*s) {
- if (*s == '\n')
- *s = ' ';
- s++;
- }
- if (s[-1] == ' ')
- s[-1] = 0;
-
- sv_catpv(sv, t);
- }
-
- Safefree(origs);
- }
- }
- }
-
- Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]);
- }
- else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH))
- Perl_sv_catpvf(aTHX_ sv, "[%d]", -(o->flags));
-#else
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(sv);
- PERL_UNUSED_ARG(o);
- PERL_UNUSED_ARG(prog);
-#endif /* DEBUGGING */
-}
-
-SV *
-Perl_re_intuit_string(pTHX_ REGEXP * const r)
-{ /* Assume that RE_INTUIT is set */
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_STRING;
- PERL_UNUSED_CONTEXT;
-
- DEBUG_COMPILE_r(
- {
- const char * const s = SvPV_nolen_const(prog->check_substr
- ? prog->check_substr : prog->check_utf8);
-
- if (!PL_colorset) reginitcolors();
- PerlIO_printf(Perl_debug_log,
- "%sUsing REx %ssubstr:%s \"%s%.60s%s%s\"\n",
- PL_colors[4],
- prog->check_substr ? "" : "utf8 ",
- PL_colors[5],PL_colors[0],
- s,
- PL_colors[1],
- (strlen(s) > 60 ? "..." : ""));
- } );
-
- return prog->check_substr ? prog->check_substr : prog->check_utf8;
-}
-
-/*
- pregfree()
-
- handles refcounting and freeing the perl core regexp structure. When
- it is necessary to actually free the structure the first thing it
- does is call the 'free' method of the regexp_engine associated to to
- the regexp, allowing the handling of the void *pprivate; member
- first. (This routine is not overridable by extensions, which is why
- the extensions free is called first.)
-
- See regdupe and regdupe_internal if you change anything here.
-*/
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_pregfree(pTHX_ REGEXP *r)
-{
- SvREFCNT_dec(r);
-}
-
-void
-Perl_pregfree2(pTHX_ REGEXP *rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_PREGFREE2;
-
- if (r->mother_re) {
- ReREFCNT_dec(r->mother_re);
- } else {
- CALLREGFREE_PVT(rx); /* free the private data */
- SvREFCNT_dec(RXp_PAREN_NAMES(r));
- }
- if (r->substrs) {
- SvREFCNT_dec(r->anchored_substr);
- SvREFCNT_dec(r->anchored_utf8);
- SvREFCNT_dec(r->float_substr);
- SvREFCNT_dec(r->float_utf8);
- Safefree(r->substrs);
- }
- RX_MATCH_COPY_FREE(rx);
-#ifdef PERL_OLD_COPY_ON_WRITE
- SvREFCNT_dec(r->saved_copy);
-#endif
- Safefree(r->offs);
-}
-
-/* reg_temp_copy()
-
- This is a hacky workaround to the structural issue of match results
- being stored in the regexp structure which is in turn stored in
- PL_curpm/PL_reg_curpm. The problem is that due to qr// the pattern
- could be PL_curpm in multiple contexts, and could require multiple
- result sets being associated with the pattern simultaneously, such
- as when doing a recursive match with (??{$qr})
-
- The solution is to make a lightweight copy of the regexp structure
- when a qr// is returned from the code executed by (??{$qr}) this
- lightweight copy doesnt actually own any of its data except for
- the starp/end and the actual regexp structure itself.
-
-*/
-
-
-REGEXP *
-Perl_reg_temp_copy (pTHX_ REGEXP *ret_x, REGEXP *rx)
-{
- struct regexp *ret;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- register const I32 npar = r->nparens+1;
-
- PERL_ARGS_ASSERT_REG_TEMP_COPY;
-
- if (!ret_x)
- ret_x = (REGEXP*) newSV_type(SVt_REGEXP);
- ret = (struct regexp *)SvANY(ret_x);
-
- (void)ReREFCNT_inc(rx);
- /* We can take advantage of the existing "copied buffer" mechanism in SVs
- by pointing directly at the buffer, but flagging that the allocated
- space in the copy is zero. As we've just done a struct copy, it's now
- a case of zero-ing that, rather than copying the current length. */
- SvPV_set(ret_x, RX_WRAPPED(rx));
- SvFLAGS(ret_x) |= SvFLAGS(rx) & (SVf_POK|SVp_POK|SVf_UTF8);
- memcpy(&(ret->xpv_cur), &(r->xpv_cur),
- sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur));
- SvLEN_set(ret_x, 0);
- SvSTASH_set(ret_x, NULL);
- SvMAGIC_set(ret_x, NULL);
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if (r->substrs) {
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- SvREFCNT_inc_void(ret->anchored_substr);
- SvREFCNT_inc_void(ret->anchored_utf8);
- SvREFCNT_inc_void(ret->float_substr);
- SvREFCNT_inc_void(ret->float_utf8);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
- }
- RX_MATCH_COPIED_off(ret_x);
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
- ret->mother_re = rx;
-
- return ret_x;
-}
-#endif
-
-/* regfree_internal()
-
- Free the private data in a regexp. This is overloadable by
- extensions. Perl takes care of the regexp structure in pregfree(),
- this covers the *pprivate pointer which technically perldoesnt
- know about, however of course we have to handle the
- regexp_internal structure when no extension is in use.
-
- Note this is called before freeing anything in the regexp
- structure.
- */
-
-void
-Perl_regfree_internal(pTHX_ REGEXP * const rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGFREE_INTERNAL;
-
- DEBUG_COMPILE_r({
- if (!PL_colorset)
- reginitcolors();
- {
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RX_UTF8(rx),
- dsv, RX_PRECOMP(rx), RX_PRELEN(rx), 60);
- PerlIO_printf(Perl_debug_log,"%sFreeing REx:%s %s\n",
- PL_colors[4],PL_colors[5],s);
- }
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets)
- Safefree(ri->u.offsets); /* 20010421 MJD */
-#endif
- if (ri->data) {
- int n = ri->data->count;
- PAD* new_comppad = NULL;
- PAD* old_comppad;
- PADOFFSET refcnt;
-
- while (--n >= 0) {
- /* If you add a ->what type here, update the comment in regcomp.h */
- switch (ri->data->what[n]) {
- case 's':
- case 'S':
- case 'u':
- SvREFCNT_dec(MUTABLE_SV(ri->data->data[n]));
- break;
- case 'f':
- Safefree(ri->data->data[n]);
- break;
- case 'p':
- new_comppad = MUTABLE_AV(ri->data->data[n]);
- break;
- case 'o':
- if (new_comppad == NULL)
- Perl_croak(aTHX_ "panic: pregfree comppad");
- PAD_SAVE_LOCAL(old_comppad,
- /* Watch out for global destruction's random ordering. */
- (SvTYPE(new_comppad) == SVt_PVAV) ? new_comppad : NULL
- );
- OP_REFCNT_LOCK;
- refcnt = OpREFCNT_dec((OP_4tree*)ri->data->data[n]);
- OP_REFCNT_UNLOCK;
- if (!refcnt)
- op_free((OP_4tree*)ri->data->data[n]);
-
- PAD_RESTORE_LOCAL(old_comppad);
- SvREFCNT_dec(MUTABLE_SV(new_comppad));
- new_comppad = NULL;
- break;
- case 'n':
- break;
- case 'T':
- { /* Aho Corasick add-on structure for a trie node.
- Used in stclass optimization only */
- U32 refcount;
- reg_ac_data *aho=(reg_ac_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --aho->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(aho->states);
- PerlMemShared_free(aho->fail);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- PerlMemShared_free(ri->regstclass);
- }
- }
- break;
- case 't':
- {
- /* trie structure. */
- U32 refcount;
- reg_trie_data *trie=(reg_trie_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --trie->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(trie->charmap);
- PerlMemShared_free(trie->states);
- PerlMemShared_free(trie->trans);
- if (trie->bitmap)
- PerlMemShared_free(trie->bitmap);
- if (trie->wordlen)
- PerlMemShared_free(trie->wordlen);
- if (trie->jump)
- PerlMemShared_free(trie->jump);
- if (trie->nextword)
- PerlMemShared_free(trie->nextword);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- }
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: regfree data code '%c'", ri->data->what[n]);
- }
- }
- Safefree(ri->data->what);
- Safefree(ri->data);
- }
-
- Safefree(ri);
-}
-
-#define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
-#define av_dup_inc(s,t) MUTABLE_AV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define hv_dup_inc(s,t) MUTABLE_HV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define SAVEPVN(p,n) ((p) ? savepvn(p,n) : NULL)
-
-/*
- re_dup - duplicate a regexp.
-
- This routine is expected to clone a given regexp structure. It is only
- compiled under USE_ITHREADS.
-
- After all of the core data stored in struct regexp is duplicated
- the regexp_engine.dupe method is used to copy any private data
- stored in the *pprivate pointer. This allows extensions to handle
- any duplication it needs to do.
-
- See pregfree() and regfree_internal() if you change anything here.
-*/
-#if defined(USE_ITHREADS)
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_re_dup_guts(pTHX_ const REGEXP *sstr, REGEXP *dstr, CLONE_PARAMS *param)
-{
- dVAR;
- I32 npar;
- const struct regexp *r = (const struct regexp *)SvANY(sstr);
- struct regexp *ret = (struct regexp *)SvANY(dstr);
-
- PERL_ARGS_ASSERT_RE_DUP_GUTS;
-
- npar = r->nparens+1;
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if(ret->swap) {
- /* no need to copy these */
- Newx(ret->swap, npar, regexp_paren_pair);
- }
-
- if (ret->substrs) {
- /* Do it this way to avoid reading from *r after the StructCopy().
- That way, if any of the sv_dup_inc()s dislodge *r from the L1
- cache, it doesn't matter. */
- const bool anchored = r->check_substr
- ? r->check_substr == r->anchored_substr
- : r->check_utf8 == r->anchored_utf8;
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- ret->anchored_substr = sv_dup_inc(ret->anchored_substr, param);
- ret->anchored_utf8 = sv_dup_inc(ret->anchored_utf8, param);
- ret->float_substr = sv_dup_inc(ret->float_substr, param);
- ret->float_utf8 = sv_dup_inc(ret->float_utf8, param);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
-
- if (ret->check_substr) {
- if (anchored) {
- assert(r->check_utf8 == r->anchored_utf8);
- ret->check_substr = ret->anchored_substr;
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- assert(r->check_substr == r->float_substr);
- assert(r->check_utf8 == r->float_utf8);
- ret->check_substr = ret->float_substr;
- ret->check_utf8 = ret->float_utf8;
- }
- } else if (ret->check_utf8) {
- if (anchored) {
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- ret->check_utf8 = ret->float_utf8;
- }
- }
- }
-
- RXp_PAREN_NAMES(ret) = hv_dup_inc(RXp_PAREN_NAMES(ret), param);
-
- if (ret->pprivate)
- RXi_SET(ret,CALLREGDUPE_PVT(dstr,param));
-
- if (RX_MATCH_COPIED(dstr))
- ret->subbeg = SAVEPVN(ret->subbeg, ret->sublen);
- else
- ret->subbeg = NULL;
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
-
- if (ret->mother_re) {
- if (SvPVX_const(dstr) == SvPVX_const(ret->mother_re)) {
- /* Our storage points directly to our mother regexp, but that's
- 1: a buffer in a different thread
- 2: something we no longer hold a reference on
- so we need to copy it locally. */
- /* Note we need to sue SvCUR() on our mother_re, because it, in
- turn, may well be pointing to its own mother_re. */
- SvPV_set(dstr, SAVEPVN(SvPVX_const(ret->mother_re),
- SvCUR(ret->mother_re)+1));
- SvLEN_set(dstr, SvCUR(ret->mother_re)+1);
- }
- ret->mother_re = NULL;
- }
- ret->gofs = 0;
-}
-#endif /* PERL_IN_XSUB_RE */
-
-/*
- regdupe_internal()
-
- This is the internal complement to regdupe() which is used to copy
- the structure pointed to by the *pprivate pointer in the regexp.
- This is the core version of the extension overridable cloning hook.
- The regexp structure being duplicated will be copied by perl prior
- to this and will be provided as the regexp *r argument, however
- with the /old/ structures pprivate pointer value. Thus this routine
- may override any copying normally done by perl.
-
- It returns a pointer to the new regexp_internal structure.
-*/
-
-void *
-Perl_regdupe_internal(pTHX_ REGEXP * const rx, CLONE_PARAMS *param)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- regexp_internal *reti;
- int len, npar;
- RXi_GET_DECL(r,ri);
-
- PERL_ARGS_ASSERT_REGDUPE_INTERNAL;
-
- npar = r->nparens+1;
- len = ProgLen(ri);
-
- Newxc(reti, sizeof(regexp_internal) + len*sizeof(regnode), char, regexp_internal);
- Copy(ri->program, reti->program, len+1, regnode);
-
-
- reti->regstclass = NULL;
-
- if (ri->data) {
- struct reg_data *d;
- const int count = ri->data->count;
- int i;
-
- Newxc(d, sizeof(struct reg_data) + count*sizeof(void *),
- char, struct reg_data);
- Newx(d->what, count, U8);
-
- d->count = count;
- for (i = 0; i < count; i++) {
- d->what[i] = ri->data->what[i];
- switch (d->what[i]) {
- /* legal options are one of: sSfpontTu
- see also regcomp.h and pregfree() */
- case 's':
- case 'S':
- case 'p': /* actually an AV, but the dup function is identical. */
- case 'u': /* actually an HV, but the dup function is identical. */
- d->data[i] = sv_dup_inc((const SV *)ri->data->data[i], param);
- break;
- case 'f':
- /* This is cheating. */
- Newx(d->data[i], 1, struct regnode_charclass_class);
- StructCopy(ri->data->data[i], d->data[i],
- struct regnode_charclass_class);
- reti->regstclass = (regnode*)d->data[i];
- break;
- case 'o':
- /* Compiled op trees are readonly and in shared memory,
- and can thus be shared without duplication. */
- OP_REFCNT_LOCK;
- d->data[i] = (void*)OpREFCNT_inc((OP*)ri->data->data[i]);
- OP_REFCNT_UNLOCK;
- break;
- case 'T':
- /* Trie stclasses are readonly and can thus be shared
- * without duplication. We free the stclass in pregfree
- * when the corresponding reg_ac_data struct is freed.
- */
- reti->regstclass= ri->regstclass;
- /* Fall through */
- case 't':
- OP_REFCNT_LOCK;
- ((reg_trie_data*)ri->data->data[i])->refcount++;
- OP_REFCNT_UNLOCK;
- /* Fall through */
- case 'n':
- d->data[i] = ri->data->data[i];
- break;
- default:
- Perl_croak(aTHX_ "panic: re_dup unknown data code '%c'", ri->data->what[i]);
- }
- }
-
- reti->data = d;
- }
- else
- reti->data = NULL;
-
- reti->name_list_idx = ri->name_list_idx;
-
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets) {
- Newx(reti->u.offsets, 2*len+1, U32);
- Copy(ri->u.offsets, reti->u.offsets, 2*len+1, U32);
- }
-#else
- SetProgLen(reti,len);
-#endif
-
- return (void*)reti;
-}
-
-#endif /* USE_ITHREADS */
-
-#ifndef PERL_IN_XSUB_RE
-
-/*
- - regnext - dig the "next" pointer out of a node
- */
-regnode *
-Perl_regnext(pTHX_ register regnode *p)
-{
- dVAR;
- register I32 offset;
-
- if (!p)
- return(NULL);
-
- offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p));
- if (offset == 0)
- return(NULL);
-
- return(p+offset);
-}
-#endif
-
-STATIC void
-S_re_croak2(pTHX_ const char* pat1,const char* pat2,...)
-{
- va_list args;
- STRLEN l1 = strlen(pat1);
- STRLEN l2 = strlen(pat2);
- char buf[512];
- SV *msv;
- const char *message;
-
- PERL_ARGS_ASSERT_RE_CROAK2;
-
- if (l1 > 510)
- l1 = 510;
- if (l1 + l2 > 510)
- l2 = 510 - l1;
- Copy(pat1, buf, l1 , char);
- Copy(pat2, buf + l1, l2 , char);
- buf[l1 + l2] = '\n';
- buf[l1 + l2 + 1] = '\0';
-#ifdef I_STDARG
- /* ANSI variant takes additional second argument */
- va_start(args, pat2);
-#else
- va_start(args);
-#endif
- msv = vmess(buf, &args);
- va_end(args);
- message = SvPV_const(msv,l1);
- if (l1 > 512)
- l1 = 512;
- Copy(message, buf, l1 , char);
- buf[l1-1] = '\0'; /* Overwrite \n */
- Perl_croak(aTHX_ "%s", buf);
-}
-
-/* XXX Here's a total kludge. But we need to re-enter for swash routines. */
-
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_save_re_context(pTHX)
-{
- dVAR;
-
- struct re_save_state *state;
-
- SAVEVPTR(PL_curcop);
- SSGROW(SAVESTACK_ALLOC_FOR_RE_SAVE_STATE + 1);
-
- state = (struct re_save_state *)(PL_savestack + PL_savestack_ix);
- PL_savestack_ix += SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
- SSPUSHINT(SAVEt_RE_STATE);
-
- Copy(&PL_reg_state, state, 1, struct re_save_state);
-
- PL_reg_start_tmp = 0;
- PL_reg_start_tmpl = 0;
- PL_reg_oldsaved = NULL;
- PL_reg_oldsavedlen = 0;
- PL_reg_maxiter = 0;
- PL_reg_leftiter = 0;
- PL_reg_poscache = NULL;
- PL_reg_poscache_size = 0;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = NULL;
-#endif
-
- /* Save $1..$n (#18107: UTF-8 s/(\w+)/uc($1)/e); AMS 20021106. */
- if (PL_curpm) {
- const REGEXP * const rx = PM_GETRE(PL_curpm);
- if (rx) {
- U32 i;
- for (i = 1; i <= RX_NPARENS(rx); i++) {
- char digits[TYPE_CHARS(long)];
- const STRLEN len = my_snprintf(digits, sizeof(digits), "%lu", (long)i);
- GV *const *const gvp
- = (GV**)hv_fetch(PL_defstash, digits, len, 0);
-
- if (gvp) {
- GV * const gv = *gvp;
- if (SvTYPE(gv) == SVt_PVGV && GvSV(gv))
- save_scalar(gv);
- }
- }
- }
- }
-}
-#endif
-
-static void
-clear_re(pTHX_ void *r)
-{
- dVAR;
- ReREFCNT_dec((REGEXP *)r);
-}
-
-#ifdef DEBUGGING
-
-STATIC void
-S_put_byte(pTHX_ SV *sv, int c)
-{
- PERL_ARGS_ASSERT_PUT_BYTE;
-
- /* Our definition of isPRINT() ignores locales, so only bytes that are
- not part of UTF-8 are considered printable. I assume that the same
- holds for UTF-EBCDIC.
- Also, code point 255 is not printable in either (it's E0 in EBCDIC,
- which Wikipedia says:
-
- EO, or Eight Ones, is an 8-bit EBCDIC character code represented as all
- ones (binary 1111 1111, hexadecimal FF). It is similar, but not
- identical, to the ASCII delete (DEL) or rubout control character.
- ) So the old condition can be simplified to !isPRINT(c) */
- if (!isPRINT(c))
- Perl_sv_catpvf(aTHX_ sv, "\\%o", c);
- else {
- const char string = c;
- if (c == '-' || c == ']' || c == '\\' || c == '^')
- sv_catpvs(sv, "\\");
- sv_catpvn(sv, &string, 1);
- }
-}
-
-
-#define CLEAR_OPTSTART \
- if (optstart) STMT_START { \
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log, " (%"IVdf" nodes)\n", (IV)(node - optstart))); \
- optstart=NULL; \
- } STMT_END
-
-#define DUMPUNTIL(b,e) CLEAR_OPTSTART; node=dumpuntil(r,start,(b),(e),last,sv,indent+1,depth+1);
-
-STATIC const regnode *
-S_dumpuntil(pTHX_ const regexp *r, const regnode *start, const regnode *node,
- const regnode *last, const regnode *plast,
- SV* sv, I32 indent, U32 depth)
-{
- dVAR;
- register U8 op = PSEUDO; /* Arbitrary non-END op. */
- register const regnode *next;
- const regnode *optstart= NULL;
-
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMPUNTIL;
-
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d : %d - %d - %d\n",indent,node-start,
- last ? last-start : 0,plast ? plast-start : 0);
-#endif
-
- if (plast && plast < last)
- last= plast;
-
- while (PL_regkind[op] != END && (!last || node < last)) {
- /* While that wasn't END last time... */
- NODE_ALIGN(node);
- op = OP(node);
- if (op == CLOSE || op == WHILEM)
- indent--;
- next = regnext((regnode *)node);
-
- /* Where, what. */
- if (OP(node) == OPTIMIZED) {
- if (!optstart && RE_DEBUG_FLAG(RE_DEBUG_COMPILE_OPTIMISE))
- optstart = node;
- else
- goto after_print;
- } else
- CLEAR_OPTSTART;
-
- regprop(r, sv, node);
- PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start),
- (int)(2*indent + 1), "", SvPVX_const(sv));
-
- if (OP(node) != OPTIMIZED) {
- if (next == NULL) /* Next ptr. */
- PerlIO_printf(Perl_debug_log, " (0)");
- else if (PL_regkind[(U8)op] == BRANCH && PL_regkind[OP(next)] != BRANCH )
- PerlIO_printf(Perl_debug_log, " (FAIL)");
- else
- PerlIO_printf(Perl_debug_log, " (%"IVdf")", (IV)(next - start));
- (void)PerlIO_putc(Perl_debug_log, '\n');
- }
-
- after_print:
- if (PL_regkind[(U8)op] == BRANCHJ) {
- assert(next);
- {
- register const regnode *nnode = (OP(next) == LONGJMP
- ? regnext((regnode *)next)
- : next);
- if (last && nnode > last)
- nnode = last;
- DUMPUNTIL(NEXTOPER(NEXTOPER(node)), nnode);
- }
- }
- else if (PL_regkind[(U8)op] == BRANCH) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node), next);
- }
- else if ( PL_regkind[(U8)op] == TRIE ) {
- const regnode *this_trie = node;
- const char op = OP(node);
- const U32 n = ARG(node);
- const reg_ac_data * const ac = op>=AHOCORASICK ?
- (reg_ac_data *)ri->data->data[n] :
- NULL;
- const reg_trie_data * const trie =
- (reg_trie_data*)ri->data->data[op<AHOCORASICK ? n : ac->trie];
-#ifdef DEBUGGING
- AV *const trie_words = MUTABLE_AV(ri->data->data[n + TRIE_WORDS_OFFSET]);
-#endif
- const regnode *nextbranch= NULL;
- I32 word_idx;
- sv_setpvs(sv, "");
- for (word_idx= 0; word_idx < (I32)trie->wordcount; word_idx++) {
- SV ** const elem_ptr = av_fetch(trie_words,word_idx,0);
-
- PerlIO_printf(Perl_debug_log, "%*s%s ",
- (int)(2*(indent+3)), "",
- elem_ptr ? pv_pretty(sv, SvPV_nolen_const(*elem_ptr), SvCUR(*elem_ptr), 60,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*elem_ptr) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT
- )
- : "???"
- );
- if (trie->jump) {
- U16 dist= trie->jump[word_idx+1];
- PerlIO_printf(Perl_debug_log, "(%"UVuf")\n",
- (UV)((dist ? this_trie + dist : next) - start));
- if (dist) {
- if (!nextbranch)
- nextbranch= this_trie + trie->jump[0];
- DUMPUNTIL(this_trie + dist, nextbranch);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode *)nextbranch);
- } else {
- PerlIO_printf(Perl_debug_log, "\n");
- }
- }
- if (last && next > last)
- node= last;
- else
- node= next;
- }
- else if ( op == CURLY ) { /* "next" might be very big: optimizer */
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS,
- NEXTOPER(node) + EXTRA_STEP_2ARGS + 1);
- }
- else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, next);
- }
- else if ( op == PLUS || op == STAR) {
- DUMPUNTIL(NEXTOPER(node), NEXTOPER(node) + 1);
- }
- else if (op == ANYOF) {
- /* arglen 1 + class block */
- node += 1 + ((ANYOF_FLAGS(node) & ANYOF_LARGE)
- ? ANYOF_CLASS_SKIP : ANYOF_SKIP);
- node = NEXTOPER(node);
- }
- else if (PL_regkind[(U8)op] == EXACT) {
- /* Literal string, where present. */
- node += NODE_SZ_STR(node) - 1;
- node = NEXTOPER(node);
- }
- else {
- node = NEXTOPER(node);
- node += regarglen[(U8)op];
- }
- if (op == CURLYX || op == OPEN)
- indent++;
- }
- CLEAR_OPTSTART;
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d\n", (int)indent);
-#endif
- return node;
-}
-
-#endif /* DEBUGGING */
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regexec.c
- */
-
-/*
- * One Ring to rule them all, One Ring to find them
- &
- * [p.v of _The Lord of the Rings_, opening poem]
- * [p.50 of _The Lord of the Rings_, I/iii: "The Shadow of the Past"]
- * [p.254 of _The Lord of the Rings_, II/ii: "The Council of Elrond"]
- */
-
-/* This file contains functions for executing a regular expression. See
- * also regcomp.c which funnily enough, contains functions for compiling
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_exec.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGEXEC_C
-#include "perl.h"
-
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#define RF_tainted 1 /* tainted information used? */
-#define RF_warned 2 /* warned about big count? */
-
-#define RF_utf8 8 /* Pattern contains multibyte chars? */
-
-#define UTF ((PL_reg_flags & RF_utf8) != 0)
-
-#define RS_init 1 /* eval environment created */
-#define RS_set 2 /* replsv value is set */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-#define REGINCLASS(prog,p,c) (ANYOF_FLAGS(p) ? reginclass(prog,p,c,0,0) : ANYOF_BITMAP_TEST(p,*(c)))
-
-/*
- * Forwards.
- */
-
-#define CHR_SVLEN(sv) (do_utf8 ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (PL_reg_match_utf8 ? utf8_distance(a,b) : a - b)
-
-#define HOPc(pos,off) \
- (char *)(PL_reg_match_utf8 \
- ? reghop3((U8*)pos, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)) \
- : (U8*)(pos + off))
-#define HOPBACKc(pos, off) \
- (char*)(PL_reg_match_utf8\
- ? reghopmaybe3((U8*)pos, -off, (U8*)PL_bostr) \
- : (pos - off >= PL_bostr) \
- ? (U8*)pos - off \
- : NULL)
-
-#define HOP3(pos,off,lim) (PL_reg_match_utf8 ? reghop3((U8*)(pos), off, (U8*)(lim)) : (U8*)(pos + off))
-#define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim))
-
-/* these are unrolled below in the CCC_TRY_XXX defined */
-#define LOAD_UTF8_CHARCLASS(class,str) STMT_START { \
- if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)str); assert(ok); LEAVE; } } STMT_END
-
-/* Doesn't do an assert to verify that is correct */
-#define LOAD_UTF8_CHARCLASS_NO_CHECK(class) STMT_START { \
- if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)" "); LEAVE; } } STMT_END
-
-#define LOAD_UTF8_CHARCLASS_ALNUM() LOAD_UTF8_CHARCLASS(alnum,"a")
-#define LOAD_UTF8_CHARCLASS_DIGIT() LOAD_UTF8_CHARCLASS(digit,"0")
-#define LOAD_UTF8_CHARCLASS_SPACE() LOAD_UTF8_CHARCLASS(space," ")
-
-#define LOAD_UTF8_CHARCLASS_GCB() /* Grapheme cluster boundaries */ \
- LOAD_UTF8_CHARCLASS(X_begin, " "); \
- LOAD_UTF8_CHARCLASS(X_non_hangul, "A"); \
- /* These are utf8 constants, and not utf-ebcdic constants, so the \
- * assert should likely and hopefully fail on an EBCDIC machine */ \
- LOAD_UTF8_CHARCLASS(X_extend, "\xcc\x80"); /* U+0300 */ \
- \
- /* No asserts are done for these, in case called on an early \
- * Unicode version in which they map to nothing */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_prepend);/* U+0E40 "\xe0\xb9\x80" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_L); /* U+1100 "\xe1\x84\x80" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_LV); /* U+AC00 "\xea\xb0\x80" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_LVT); /* U+AC01 "\xea\xb0\x81" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_LV_LVT_V);/* U+AC01 "\xea\xb0\x81" */\
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_T); /* U+11A8 "\xe1\x86\xa8" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_V) /* U+1160 "\xe1\x85\xa0" */
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS_ALNUM()
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS_SPACE()
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS_DIGIT()
-#define RE_utf8_perl_word PL_utf8_alnum
-#define RE_utf8_perl_space PL_utf8_space
-#define RE_utf8_posix_digit PL_utf8_digit
-#define perl_word alnum
-#define perl_space space
-#define posix_digit digit
-#else
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS(perl_word,"a")
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS(perl_space," ")
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS(posix_digit,"0")
-#define RE_utf8_perl_word PL_utf8_perl_word
-#define RE_utf8_perl_space PL_utf8_perl_space
-#define RE_utf8_posix_digit PL_utf8_posix_digit
-#endif
-
-
-#define CCC_TRY_AFF(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME: \
- if (!nextchr) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if (!(OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if (!(OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-#define CCC_TRY_NEG(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME : \
- if (!nextchr && locinput >= PL_regeol) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if ((OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if ((OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-
-
-
-
-/* TODO: Combine JUMPABLE and HAS_TEXT to cache OP(rn) */
-
-/* for use after a quantifier and before an EXACT-like node -- japhy */
-/* it would be nice to rework regcomp.sym to generate this stuff. sigh */
-#define JUMPABLE(rn) ( \
- OP(rn) == OPEN || \
- (OP(rn) == CLOSE && (!cur_eval || cur_eval->u.eval.close_paren != ARG(rn))) || \
- OP(rn) == EVAL || \
- OP(rn) == SUSPEND || OP(rn) == IFMATCH || \
- OP(rn) == PLUS || OP(rn) == MINMOD || \
- OP(rn) == KEEPS || (PL_regkind[OP(rn)] == VERB) || \
- (PL_regkind[OP(rn)] == CURLY && ARG1(rn) > 0) \
-)
-#define IS_EXACT(rn) (PL_regkind[OP(rn)] == EXACT)
-
-#define HAS_TEXT(rn) ( IS_EXACT(rn) || PL_regkind[OP(rn)] == REF )
-
-#if 0
-/* Currently these are only used when PL_regkind[OP(rn)] == EXACT so
- we don't need this definition. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT || OP(rn)==REF || OP(rn)==NREF )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF || OP(rn)==REFF || OP(rn)==NREFF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL || OP(rn)==REFFL || OP(rn)==NREFFL )
-
-#else
-/* ... so we use this as its faster. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL )
-
-#endif
-
-/*
- Search for mandatory following text node; for lookahead, the text must
- follow but for lookbehind (rn->flags != 0) we skip to the next step.
-*/
-#define FIND_NEXT_IMPT(rn) STMT_START { \
- while (JUMPABLE(rn)) { \
- const OPCODE type = OP(rn); \
- if (type == SUSPEND || PL_regkind[type] == CURLY) \
- rn = NEXTOPER(NEXTOPER(rn)); \
- else if (type == PLUS) \
- rn = NEXTOPER(rn); \
- else if (type == IFMATCH) \
- rn = (rn->flags == 0) ? NEXTOPER(NEXTOPER(rn)) : rn + ARG(rn); \
- else rn += NEXT_OFF(rn); \
- } \
-} STMT_END
-
-
-static void restore_pos(pTHX_ void *arg);
-
-STATIC CHECKPOINT
-S_regcppush(pTHX_ I32 parenfloor)
-{
- dVAR;
- const int retval = PL_savestack_ix;
-#define REGCP_PAREN_ELEMS 4
- const int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS;
- int p;
- GET_RE_DEBUG_FLAGS_DECL;
-
- if (paren_elems_to_push < 0)
- Perl_croak(aTHX_ "panic: paren_elems_to_push < 0");
-
-#define REGCP_OTHER_ELEMS 7
- SSGROW(paren_elems_to_push + REGCP_OTHER_ELEMS);
-
- for (p = PL_regsize; p > parenfloor; p--) {
-/* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */
- SSPUSHINT(PL_regoffs[p].end);
- SSPUSHINT(PL_regoffs[p].start);
- SSPUSHPTR(PL_reg_start_tmp[p]);
- SSPUSHINT(p);
- DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log,
- " saving \\%"UVuf" %"IVdf"(%"IVdf")..%"IVdf"\n",
- (UV)p, (IV)PL_regoffs[p].start,
- (IV)(PL_reg_start_tmp[p] - PL_bostr),
- (IV)PL_regoffs[p].end
- ));
- }
-/* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */
- SSPUSHPTR(PL_regoffs);
- SSPUSHINT(PL_regsize);
- SSPUSHINT(*PL_reglastparen);
- SSPUSHINT(*PL_reglastcloseparen);
- SSPUSHPTR(PL_reginput);
-#define REGCP_FRAME_ELEMS 2
-/* REGCP_FRAME_ELEMS are part of the REGCP_OTHER_ELEMS and
- * are needed for the regexp context stack bookkeeping. */
- SSPUSHINT(paren_elems_to_push + REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- SSPUSHINT(SAVEt_REGCONTEXT); /* Magic cookie. */
-
- return retval;
-}
-
-/* These are needed since we do not localize EVAL nodes: */
-#define REGCP_SET(cp) \
- DEBUG_STATE_r( \
- PerlIO_printf(Perl_debug_log, \
- " Setting an EVAL scope, savestack=%"IVdf"\n", \
- (IV)PL_savestack_ix)); \
- cp = PL_savestack_ix
-
-#define REGCP_UNWIND(cp) \
- DEBUG_STATE_r( \
- if (cp != PL_savestack_ix) \
- PerlIO_printf(Perl_debug_log, \
- " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \
- (IV)(cp), (IV)PL_savestack_ix)); \
- regcpblow(cp)
-
-STATIC char *
-S_regcppop(pTHX_ const regexp *rex)
-{
- dVAR;
- U32 i;
- char *input;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCPPOP;
-
- /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */
- i = SSPOPINT;
- assert(i == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */
- i = SSPOPINT; /* Parentheses elements to pop. */
- input = (char *) SSPOPPTR;
- *PL_reglastcloseparen = SSPOPINT;
- *PL_reglastparen = SSPOPINT;
- PL_regsize = SSPOPINT;
- PL_regoffs=(regexp_paren_pair *) SSPOPPTR;
-
-
- /* Now restore the parentheses context. */
- for (i -= (REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- i > 0; i -= REGCP_PAREN_ELEMS) {
- I32 tmps;
- U32 paren = (U32)SSPOPINT;
- PL_reg_start_tmp[paren] = (char *) SSPOPPTR;
- PL_regoffs[paren].start = SSPOPINT;
- tmps = SSPOPINT;
- if (paren <= *PL_reglastparen)
- PL_regoffs[paren].end = tmps;
- DEBUG_BUFFERS_r(
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n",
- (UV)paren, (IV)PL_regoffs[paren].start,
- (IV)(PL_reg_start_tmp[paren] - PL_bostr),
- (IV)PL_regoffs[paren].end,
- (paren > *PL_reglastparen ? "(no)" : ""));
- );
- }
- DEBUG_BUFFERS_r(
- if (*PL_reglastparen + 1 <= rex->nparens) {
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"IVdf"..\\%"IVdf" to undef\n",
- (IV)(*PL_reglastparen + 1), (IV)rex->nparens);
- }
- );
-#if 1
- /* It would seem that the similar code in regtry()
- * already takes care of this, and in fact it is in
- * a better location to since this code can #if 0-ed out
- * but the code in regtry() is needed or otherwise tests
- * requiring null fields (pat.t#187 and split.t#{13,14}
- * (as of patchlevel 7877) will fail. Then again,
- * this code seems to be necessary or otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * --jhi updated by dapm */
- for (i = *PL_reglastparen + 1; i <= rex->nparens; i++) {
- if (i > PL_regsize)
- PL_regoffs[i].start = -1;
- PL_regoffs[i].end = -1;
- }
-#endif
- return input;
-}
-
-#define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */
-
-/*
- * pregexec and friends
- */
-
-#ifndef PERL_IN_XSUB_RE
-/*
- - pregexec - match a regexp against a string
- */
-I32
-Perl_pregexec(pTHX_ REGEXP * const prog, char* stringarg, register char *strend,
- char *strbeg, I32 minend, SV *screamer, U32 nosave)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* nosave: For optimizations. */
-{
- PERL_ARGS_ASSERT_PREGEXEC;
-
- return
- regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL,
- nosave ? 0 : REXEC_COPY_STR);
-}
-#endif
-
-/*
- * Need to implement the following flags for reg_anch:
- *
- * USE_INTUIT_NOML - Useful to call re_intuit_start() first
- * USE_INTUIT_ML
- * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer
- * INTUIT_AUTORITATIVE_ML
- * INTUIT_ONCE_NOML - Intuit can match in one location only.
- * INTUIT_ONCE_ML
- *
- * Another flag for this function: SECOND_TIME (so that float substrs
- * with giant delta may be not rechecked).
- */
-
-/* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */
-
-/* If SCREAM, then SvPVX_const(sv) should be compatible with strpos and strend.
- Otherwise, only SvCUR(sv) is used to get strbeg. */
-
-/* XXXX We assume that strpos is strbeg unless sv. */
-
-/* XXXX Some places assume that there is a fixed substring.
- An update may be needed if optimizer marks as "INTUITable"
- RExen without fixed substrings. Similarly, it is assumed that
- lengths of all the strings are no more than minlen, thus they
- cannot come from lookahead.
- (Or minlen should take into account lookahead.)
- NOTE: Some of this comment is not correct. minlen does now take account
- of lookahead/behind. Further research is required. -- demerphq
-
-*/
-
-/* A failure to find a constant substring means that there is no need to make
- an expensive call to REx engine, thus we celebrate a failure. Similarly,
- finding a substring too deep into the string means that less calls to
- regtry() should be needed.
-
- REx compiler's optimizer found 4 possible hints:
- a) Anchored substring;
- b) Fixed substring;
- c) Whether we are anchored (beginning-of-line or \G);
- d) First node (of those at offset 0) which may distingush positions;
- We use a)b)d) and multiline-part of c), and try to find a position in the
- string which does not contradict any of them.
- */
-
-/* Most of decisions we do here should have been done at compile time.
- The nodes of the REx which we used for the search should have been
- deleted from the finite automaton. */
-
-char *
-Perl_re_intuit_start(pTHX_ REGEXP * const rx, SV *sv, char *strpos,
- char *strend, const U32 flags, re_scream_pos_data *data)
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- register I32 start_shift = 0;
- /* Should be nonnegative! */
- register I32 end_shift = 0;
- register char *s;
- register SV *check;
- char *strbeg;
- char *t;
- const bool do_utf8 = (sv && SvUTF8(sv)) ? 1 : 0; /* if no sv we have to assume bytes */
- I32 ml_anch;
- register char *other_last = NULL; /* other substr checked before this */
- char *check_at = NULL; /* check substr found at this pos */
- const I32 multiline = prog->extflags & RXf_PMf_MULTILINE;
- RXi_GET_DECL(prog,progi);
-#ifdef DEBUGGING
- const char * const i_strpos = strpos;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_START;
-
- RX_MATCH_UTF8_set(rx,do_utf8);
-
- if (RX_UTF8(rx)) {
- PL_reg_flags |= RF_utf8;
- }
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, strpos, strend,
- sv ? "Guessing start of match in sv for"
- : "Guessing start of match in string for");
- );
-
- /* CHR_DIST() would be more correct here but it makes things slow. */
- if (prog->minlen > strend - strpos) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short... [re_intuit_start]\n"));
- goto fail;
- }
-
- strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos;
- PL_regeol = strend;
- if (do_utf8) {
- if (!prog->check_utf8 && prog->check_substr)
- to_utf8_substr(prog);
- check = prog->check_utf8;
- } else {
- if (!prog->check_substr && prog->check_utf8)
- to_byte_substr(prog);
- check = prog->check_substr;
- }
- if (check == &PL_sv_undef) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Non-utf8 string cannot match utf8 check string\n"));
- goto fail;
- }
- if (prog->extflags & RXf_ANCH) { /* Match at beg-of-str or after \n */
- ml_anch = !( (prog->extflags & RXf_ANCH_SINGLE)
- || ( (prog->extflags & RXf_ANCH_BOL)
- && !multiline ) ); /* Check after \n? */
-
- if (!ml_anch) {
- if ( !(prog->extflags & RXf_ANCH_GPOS) /* Checked by the caller */
- && !(prog->intflags & PREGf_IMPLICIT) /* not a real BOL */
- /* SvCUR is not set on references: SvRV and SvPVX_const overlap */
- && sv && !SvROK(sv)
- && (strpos != strbeg)) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not at start...\n"));
- goto fail;
- }
- if (prog->check_offset_min == prog->check_offset_max &&
- !(prog->extflags & RXf_CANY_SEEN)) {
- /* Substring at constant offset from beg-of-str... */
- I32 slen;
-
- s = HOP3c(strpos, prog->check_offset_min, strend);
-
- if (SvTAIL(check)) {
- slen = SvCUR(check); /* >= 1 */
-
- if ( strend - s > slen || strend - s < slen - 1
- || (strend - s == slen && strend[-1] != '\n')) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String too long...\n"));
- goto fail_finish;
- }
- /* Now should match s[0..slen-2] */
- slen--;
- if (slen && (*SvPVX_const(check) != *s
- || (slen > 1
- && memNE(SvPVX_const(check), s, slen)))) {
- report_neq:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String not equal...\n"));
- goto fail_finish;
- }
- }
- else if (*SvPVX_const(check) != *s
- || ((slen = SvCUR(check)) > 1
- && memNE(SvPVX_const(check), s, slen)))
- goto report_neq;
- check_at = s;
- goto success_at_start;
- }
- }
- /* Match is anchored, but substr is not anchored wrt beg-of-str. */
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- if (!ml_anch) {
- const I32 end = prog->check_offset_max + CHR_SVLEN(check)
- - (SvTAIL(check) != 0);
- const I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end;
-
- if (end_shift < eshift)
- end_shift = eshift;
- }
- }
- else { /* Can match at random position */
- ml_anch = 0;
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- /* end shift should be non negative here */
- }
-
-#ifdef QDEBUGGING /* 7/99: reports of failure (with the older version) */
- if (end_shift < 0)
- Perl_croak(aTHX_ "panic: end_shift: %"IVdf" pattern:\n%s\n ",
- (IV)end_shift, RX_PRECOMP(prog));
-#endif
-
- restart:
- /* Find a possible match in the region s..strend by looking for
- the "check" substring in the region corrected by start/end_shift. */
-
- {
- I32 srch_start_shift = start_shift;
- I32 srch_end_shift = end_shift;
- if (srch_start_shift < 0 && strbeg - s > srch_start_shift) {
- srch_end_shift -= ((strbeg - s) - srch_start_shift);
- srch_start_shift = strbeg - s;
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "Check offset min: %"IVdf" Start shift: %"IVdf" End shift %"IVdf" Real End Shift: %"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)srch_start_shift,
- (IV)srch_end_shift,
- (IV)prog->check_end_shift);
- });
-
- if (flags & REXEC_SCREAM) {
- I32 p = -1; /* Internal iterator of scream. */
- I32 * const pp = data ? data->scream_pos : &p;
-
- if (PL_screamfirst[BmRARE(check)] >= 0
- || ( BmRARE(check) == '\n'
- && (BmPREVIOUS(check) == SvCUR(check) - 1)
- && SvTAIL(check) ))
- s = screaminstr(sv, check,
- srch_start_shift + (s - strbeg), srch_end_shift, pp, 0);
- else
- goto fail_finish;
- /* we may be pointing at the wrong string */
- if (s && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- if (data)
- *data->scream_olds = s;
- }
- else {
- U8* start_point;
- U8* end_point;
- if (prog->extflags & RXf_CANY_SEEN) {
- start_point= (U8*)(s + srch_start_shift);
- end_point= (U8*)(strend - srch_end_shift);
- } else {
- start_point= HOP3(s, srch_start_shift, srch_start_shift < 0 ? strbeg : strend);
- end_point= HOP3(strend, -srch_end_shift, strbeg);
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "fbm_instr len=%d str=<%.*s>\n",
- (int)(end_point - start_point),
- (int)(end_point - start_point) > 20 ? 20 : (int)(end_point - start_point),
- start_point);
- });
-
- s = fbm_instr( start_point, end_point,
- check, multiline ? FBMrf_MULTILINE : 0);
- }
- }
- /* Update the count-of-usability, remove useless subpatterns,
- unshift s. */
-
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(check), RE_SV_DUMPLEN(check), 30);
- PerlIO_printf(Perl_debug_log, "%s %s substr %s%s%s",
- (s ? "Found" : "Did not find"),
- (check == (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)
- ? "anchored" : "floating"),
- quoted,
- RE_SV_TAIL(check),
- (s ? " at offset " : "...\n") );
- });
-
- if (!s)
- goto fail_finish;
- /* Finish the diagnostic message */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) );
-
- /* XXX dmq: first branch is for positive lookbehind...
- Our check string is offset from the beginning of the pattern.
- So we need to do any stclass tests offset forward from that
- point. I think. :-(
- */
-
-
-
- check_at=s;
-
-
- /* Got a candidate. Check MBOL anchoring, and the *other* substr.
- Start with the other substr.
- XXXX no SCREAM optimization yet - and a very coarse implementation
- XXXX /ttx+/ results in anchored="ttx", floating="x". floating will
- *always* match. Probably should be marked during compile...
- Probably it is right to do no SCREAM here...
- */
-
- if (do_utf8 ? (prog->float_utf8 && prog->anchored_utf8)
- : (prog->float_substr && prog->anchored_substr))
- {
- /* Take into account the "other" substring. */
- /* XXXX May be hopelessly wrong for UTF... */
- if (!other_last)
- other_last = strpos;
- if (check == (do_utf8 ? prog->float_utf8 : prog->float_substr)) {
- do_other_anchored:
- {
- char * const last = HOP3c(s, -start_shift, strbeg);
- char *last1, *last2;
- char * const saved_s = s;
- SV* must;
-
- t = s - prog->check_offset_max;
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -(prog->check_offset_max), (U8*)strpos))
- && t > strpos)))
- NOOP;
- else
- t = strpos;
- t = HOP3c(t, prog->anchored_offset, strend);
- if (t < other_last) /* These positions already checked */
- t = other_last;
- last2 = last1 = HOP3c(strend, -prog->minlen, strbeg);
- if (last < last1)
- last1 = last;
- /* XXXX It is not documented what units *_offsets are in.
- We assume bytes, but this is clearly wrong.
- Meaning this code needs to be carefully reviewed for errors.
- dmq.
- */
-
- /* On end-of-str: see comment below. */
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->anchored_utf8); /* for debug */
- }
- else
- s = fbm_instr(
- (unsigned char*)t,
- HOP3(HOP3(last1, prog->anchored_offset, strend)
- + SvCUR(must), -(SvTAIL(must)!=0), strbeg),
- must,
- multiline ? FBMrf_MULTILINE : 0
- );
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s anchored substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
-
-
- if (!s) {
- if (last1 >= last2) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying floating at offset %ld...\n",
- (long)(HOP3c(saved_s, 1, strend) - i_strpos)));
- other_last = HOP3c(last1, prog->anchored_offset+1, strend);
- s = HOP3c(last, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- t = HOP3c(s, -prog->anchored_offset, strbeg);
- other_last = HOP3c(s, 1, strend);
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
- else { /* Take into account the floating substring. */
- char *last, *last1;
- char * const saved_s = s;
- SV* must;
-
- t = HOP3c(s, -start_shift, strbeg);
- last1 = last =
- HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg);
- if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset)
- last = HOP3c(t, prog->float_max_offset, strend);
- s = HOP3c(t, prog->float_min_offset, strend);
- if (s < other_last)
- s = other_last;
- /* XXXX It is not documented what units *_offsets are in. Assume bytes. */
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- /* fbm_instr() takes into account exact value of end-of-str
- if the check is SvTAIL(ed). Since false positives are OK,
- and end-of-str is not later than strend we are OK. */
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->float_utf8); /* for debug message */
- }
- else
- s = fbm_instr((unsigned char*)s,
- (unsigned char*)last + SvCUR(must)
- - (SvTAIL(must)!=0),
- must, multiline ? FBMrf_MULTILINE : 0);
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s floating substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
- if (!s) {
- if (last1 == last) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying anchored starting at offset %ld...\n",
- (long)(saved_s + 1 - i_strpos)));
- other_last = last;
- s = HOP3c(t, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- other_last = s; /* Fix this later. --Hugo */
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
-
-
- t= (char*)HOP3( s, -prog->check_offset_max, (prog->check_offset_max<0) ? strend : strpos);
-
- DEBUG_OPTIMISE_MORE_r(
- PerlIO_printf(Perl_debug_log,
- "Check offset min:%"IVdf" max:%"IVdf" S:%"IVdf" t:%"IVdf" D:%"IVdf" end:%"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)prog->check_offset_max,
- (IV)(s-strpos),
- (IV)(t-strpos),
- (IV)(t-s),
- (IV)(strend-strpos)
- )
- );
-
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -prog->check_offset_max, (U8*) ((prog->check_offset_max<0) ? strend : strpos)))
- && t > strpos)))
- {
- /* Fixed substring is found far enough so that the match
- cannot start at strpos. */
- try_at_offset:
- if (ml_anch && t[-1] != '\n') {
- /* Eventually fbm_*() should handle this, but often
- anchored_offset is not 0, so this check will not be wasted. */
- /* XXXX In the code below we prefer to look for "^" even in
- presence of anchored substrings. And we search even
- beyond the found float position. These pessimizations
- are historical artefacts only. */
- find_anchor:
- while (t < strend - prog->minlen) {
- if (*t == '\n') {
- if (t < check_at - prog->check_offset_min) {
- if (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) {
- /* Since we moved from the found position,
- we definitely contradict the found anchored
- substr. Due to the above check we do not
- contradict "check" substr.
- Thus we can arrive here only if check substr
- is float. Redo checking for "other"=="fixed".
- */
- strpos = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset)));
- goto do_other_anchored;
- }
- /* We don't contradict the found floating substring. */
- /* XXXX Why not check for STCLASS? */
- s = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(s - i_strpos)));
- goto set_useful;
- }
- /* Position contradicts check-string */
- /* XXXX probably better to look for check-string
- than for "\n", so one should lower the limit for t? */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t + 1 - i_strpos)));
- other_last = strpos = s = t + 1;
- goto restart;
- }
- t++;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- goto fail_finish;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- }
- s = t;
- set_useful:
- ++BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr); /* hooray/5 */
- }
- else {
- /* The found string does not prohibit matching at strpos,
- - no optimization of calling REx engine can be performed,
- unless it was an MBOL and we are not after MBOL,
- or a future STCLASS check will fail this. */
- try_at_start:
- /* Even in this situation we may use MBOL flag if strpos is offset
- wrt the start of the string. */
- if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */
- && (strpos != strbeg) && strpos[-1] != '\n'
- /* May be due to an implicit anchor of m{.*foo} */
- && !(prog->intflags & PREGf_IMPLICIT))
- {
- t = strpos;
- goto find_anchor;
- }
- DEBUG_EXECUTE_r( if (ml_anch)
- PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n",
- (long)(strpos - i_strpos), PL_colors[0], PL_colors[1]);
- );
- success_at_start:
- if (!(prog->intflags & PREGf_NAUGHTY) /* XXXX If strpos moved? */
- && (do_utf8 ? (
- prog->check_utf8 /* Could be deleted already */
- && --BmUSEFUL(prog->check_utf8) < 0
- && (prog->check_utf8 == prog->float_utf8)
- ) : (
- prog->check_substr /* Could be deleted already */
- && --BmUSEFUL(prog->check_substr) < 0
- && (prog->check_substr == prog->float_substr)
- )))
- {
- /* If flags & SOMETHING - do not do it many times on the same match */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n"));
- /* XXX Does the destruction order has to change with do_utf8? */
- SvREFCNT_dec(do_utf8 ? prog->check_utf8 : prog->check_substr);
- SvREFCNT_dec(do_utf8 ? prog->check_substr : prog->check_utf8);
- prog->check_substr = prog->check_utf8 = NULL; /* disable */
- prog->float_substr = prog->float_utf8 = NULL; /* clear */
- check = NULL; /* abort */
- s = strpos;
- /* XXXX This is a remnant of the old implementation. It
- looks wasteful, since now INTUIT can use many
- other heuristics. */
- prog->extflags &= ~RXf_USE_INTUIT;
- }
- else
- s = strpos;
- }
-
- /* Last resort... */
- /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */
- /* trie stclasses are too expensive to use here, we are better off to
- leave it to regmatch itself */
- if (progi->regstclass && PL_regkind[OP(progi->regstclass)]!=TRIE) {
- /* minlen == 0 is possible if regstclass is \b or \B,
- and the fixed substr is ''$.
- Since minlen is already taken into account, s+1 is before strend;
- accidentally, minlen >= 1 guaranties no false positives at s + 1
- even for \b or \B. But (minlen? 1 : 0) below assumes that
- regstclass does not come from lookahead... */
- /* If regstclass takes bytelength more than 1: If charlength==1, OK.
- This leaves EXACTF only, which is dealt with in find_byclass(). */
- const U8* const str = (U8*)STRING(progi->regstclass);
- const int cl_l = (PL_regkind[OP(progi->regstclass)] == EXACT
- ? CHR_DIST(str+STR_LEN(progi->regstclass), str)
- : 1);
- char * endpos;
- if (prog->anchored_substr || prog->anchored_utf8 || ml_anch)
- endpos= HOP3c(s, (prog->minlen ? cl_l : 0), strend);
- else if (prog->float_substr || prog->float_utf8)
- endpos= HOP3c(HOP3c(check_at, -start_shift, strbeg), cl_l, strend);
- else
- endpos= strend;
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %"IVdf" s: %"IVdf" endpos: %"IVdf"\n",
- (IV)start_shift, (IV)(check_at - strbeg), (IV)(s - strbeg), (IV)(endpos - strbeg)));
-
- t = s;
- s = find_byclass(prog, progi->regstclass, s, endpos, NULL);
- if (!s) {
-#ifdef DEBUGGING
- const char *what = NULL;
-#endif
- if (endpos == strend) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "This position contradicts STCLASS...\n") );
- if ((prog->extflags & RXf_ANCH) && !ml_anch)
- goto fail;
- /* Contradict one of substrings */
- if (prog->anchored_substr || prog->anchored_utf8) {
- if ((do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) == check) {
- DEBUG_EXECUTE_r( what = "anchored" );
- hop_and_restart:
- s = HOP3c(t, 1, strend);
- if (s + start_shift + end_shift > strend) {
- /* XXXX Should be taken into account earlier? */
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for %s substr starting at offset %ld...\n",
- what, (long)(s + start_shift - i_strpos)) );
- goto restart;
- }
- /* Have both, check_string is floating */
- if (t + start_shift >= check_at) /* Contradicts floating=check */
- goto retry_floating_check;
- /* Recheck anchored substring, but not floating... */
- s = check_at;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for anchored substr starting at offset %ld...\n",
- (long)(other_last - i_strpos)) );
- goto do_other_anchored;
- }
- /* Another way we could have checked stclass at the
- current position only: */
- if (ml_anch) {
- s = t = t + 1;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for /%s^%s/m starting at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t - i_strpos)) );
- goto try_at_offset;
- }
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) /* Could have been deleted */
- goto fail;
- /* Check is floating subtring. */
- retry_floating_check:
- t = check_at - start_shift;
- DEBUG_EXECUTE_r( what = "floating" );
- goto hop_and_restart;
- }
- if (t != s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "By STCLASS: moving %ld --> %ld\n",
- (long)(t - i_strpos), (long)(s - i_strpos))
- );
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Does not contradict STCLASS...\n");
- );
- }
- }
- giveup:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n",
- PL_colors[4], (check ? "Guessed" : "Giving up"),
- PL_colors[5], (long)(s - i_strpos)) );
- return s;
-
- fail_finish: /* Substring not found */
- if (prog->check_substr || prog->check_utf8) /* could be removed already */
- BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr) += 5; /* hooray */
- fail:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n",
- PL_colors[4], PL_colors[5]));
- return NULL;
-}
-
-#define DECL_TRIE_TYPE(scan) \
- const enum { trie_plain, trie_utf8, trie_utf8_fold, trie_latin_utf8_fold } \
- trie_type = (scan->flags != EXACT) \
- ? (do_utf8 ? trie_utf8_fold : (UTF ? trie_latin_utf8_fold : trie_plain)) \
- : (do_utf8 ? trie_utf8 : trie_plain)
-
-#define REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, uscan, len, \
-uvc, charid, foldlen, foldbuf, uniflags) STMT_START { \
- switch (trie_type) { \
- case trie_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_latin_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- len = 1; \
- uvc = to_uni_fold( *(U8*)uc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_utf8: \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- break; \
- case trie_plain: \
- uvc = (UV)*uc; \
- len = 1; \
- } \
- if (uvc < 256) { \
- charid = trie->charmap[ uvc ]; \
- } \
- else { \
- charid = 0; \
- if (widecharmap) { \
- SV** const svpp = hv_fetch(widecharmap, \
- (char*)&uvc, sizeof(UV), 0); \
- if (svpp) \
- charid = (U16)SvIV(*svpp); \
- } \
- } \
-} STMT_END
-
-#define REXEC_FBC_EXACTISH_CHECK(CoNd) \
-{ \
- char *my_strend= (char *)strend; \
- if ( (CoNd) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8, \
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- else { \
- U8 foldbuf[UTF8_MAXBYTES_CASE+1]; \
- uvchr_to_utf8(tmpbuf, c); \
- f = to_utf8_fold(tmpbuf, foldbuf, &foldlen); \
- if ( f != c \
- && (f == c1 || f == c2) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8,\
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- } \
-} \
-s += len
-
-#define REXEC_FBC_EXACTISH_SCAN(CoNd) \
-STMT_START { \
- while (s <= e) { \
- if ( (CoNd) \
- && (ln == 1 || !(OP(c) == EXACTF \
- ? ibcmp(s, m, ln) \
- : ibcmp_locale(s, m, ln))) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_SCAN(CoDe) \
-STMT_START { \
- while (s + (uskip = UTF8SKIP(s)) <= strend) { \
- CoDe \
- s += uskip; \
- } \
-} STMT_END
-
-#define REXEC_FBC_SCAN(CoDe) \
-STMT_START { \
- while (s < strend) { \
- CoDe \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_CLASS_SCAN(CoNd) \
-REXEC_FBC_UTF8_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_CLASS_SCAN(CoNd) \
-REXEC_FBC_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_TRYIT \
-if ((!reginfo || regtry(reginfo, &s))) \
- goto got_it
-
-#define REXEC_FBC_CSCAN(CoNdUtF8,CoNd) \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_PRELOAD(UtFpReLoAd,CoNdUtF8,CoNd) \
- if (do_utf8) { \
- UtFpReLoAd; \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_TAINT(CoNdUtF8,CoNd) \
- PL_reg_flags |= RF_tainted; \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define DUMP_EXEC_POS(li,s,doutf8) \
- dump_exec_pos(li,s,(PL_regeol),(PL_bostr),(PL_reg_starttry),doutf8)
-
-/* We know what class REx starts with. Try to find this position... */
-/* if reginfo is NULL, its a dryrun */
-/* annoyingly all the vars in this routine have different names from their counterparts
- in regmatch. /grrr */
-
-STATIC char *
-S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
- const char *strend, regmatch_info *reginfo)
-{
- dVAR;
- const I32 doevery = (prog->intflags & PREGf_SKIP) == 0;
- char *m;
- STRLEN ln;
- STRLEN lnc;
- register STRLEN uskip;
- unsigned int c1;
- unsigned int c2;
- char *e;
- register I32 tmp = 1; /* Scratch variable? */
- register const bool do_utf8 = PL_reg_match_utf8;
- RXi_GET_DECL(prog,progi);
-
- PERL_ARGS_ASSERT_FIND_BYCLASS;
-
- /* We know what class it must start with. */
- switch (OP(c)) {
- case ANYOF:
- if (do_utf8) {
- REXEC_FBC_UTF8_CLASS_SCAN((ANYOF_FLAGS(c) & ANYOF_UNICODE) ||
- !UTF8_IS_INVARIANT((U8)s[0]) ?
- reginclass(prog, c, (U8*)s, 0, do_utf8) :
- REGINCLASS(prog, c, (U8*)s));
- }
- else {
- while (s < strend) {
- STRLEN skip = 1;
-
- if (REGINCLASS(prog, c, (U8*)s) ||
- (ANYOF_FOLD_SHARP_S(c, s, strend) &&
- /* The assignment of 2 is intentional:
- * for the folded sharp s, the skip is 2. */
- (skip = SHARP_S_SKIP))) {
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += skip;
- }
- }
- break;
- case CANY:
- REXEC_FBC_SCAN(
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- );
- break;
- case EXACTF:
- m = STRING(c);
- ln = STR_LEN(c); /* length to match in octets/bytes */
- lnc = (I32) ln; /* length to match in characters */
- if (UTF) {
- STRLEN ulen1, ulen2;
- U8 *sm = (U8 *) m;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
- /* used by commented-out code below */
- /*const U32 uniflags = UTF8_ALLOW_DEFAULT;*/
-
- /* XXX: Since the node will be case folded at compile
- time this logic is a little odd, although im not
- sure that its actually wrong. --dmq */
-
- c1 = to_utf8_lower((U8*)m, tmpbuf1, &ulen1);
- c2 = to_utf8_upper((U8*)m, tmpbuf2, &ulen2);
-
- /* XXX: This is kinda strange. to_utf8_XYZ returns the
- codepoint of the first character in the converted
- form, yet originally we did the extra step.
- No tests fail by commenting this code out however
- so Ive left it out. -- dmq.
-
- c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- */
-
- lnc = 0;
- while (sm < ((U8 *) m + ln)) {
- lnc++;
- sm += UTF8SKIP(sm);
- }
- }
- else {
- c1 = *(U8*)m;
- c2 = PL_fold[c1];
- }
- goto do_exactf;
- case EXACTFL:
- m = STRING(c);
- ln = STR_LEN(c);
- lnc = (I32) ln;
- c1 = *(U8*)m;
- c2 = PL_fold_locale[c1];
- do_exactf:
- e = HOP3c(strend, -((I32)lnc), s);
-
- if (!reginfo && e < s)
- e = s; /* Due to minlen logic of intuit() */
-
- /* The idea in the EXACTF* cases is to first find the
- * first character of the EXACTF* node and then, if
- * necessary, case-insensitively compare the full
- * text of the node. The c1 and c2 are the first
- * characters (though in Unicode it gets a bit
- * more complicated because there are more cases
- * than just upper and lower: one needs to use
- * the so-called folding case for case-insensitive
- * matching (called "loose matching" in Unicode).
- * ibcmp_utf8() will do just that. */
-
- if (do_utf8 || UTF) {
- UV c, f;
- U8 tmpbuf [UTF8_MAXBYTES+1];
- STRLEN len = 1;
- STRLEN foldlen;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- if (c1 == c2) {
- /* Upper and lower of 1st char are equal -
- * probably not a "letter". */
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
- REXEC_FBC_EXACTISH_CHECK(c == c1);
- }
- }
- else {
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
-
- /* Handle some of the three Greek sigmas cases.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (the character class or ANYOF cases)
- * are handled during compiletime in
- * regexec.c:S_regclass(). */
- if (c == (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA ||
- c == (UV)UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA)
- c = (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA;
-
- REXEC_FBC_EXACTISH_CHECK(c == c1 || c == c2);
- }
- }
- }
- else {
- /* Neither pattern nor string are UTF8 */
- if (c1 == c2)
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1);
- else
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1 || *(U8*)s == c2);
- }
- break;
- case BOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == BOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == BOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- if ((!prog->minlen && tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NBOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == NBOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == NBOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == NBOUND ?
- isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- if ((!prog->minlen && !tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case ALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- isALNUM(*s)
- );
- case ALNUML:
- REXEC_FBC_CSCAN_TAINT(
- isALNUM_LC_utf8((U8*)s),
- isALNUM_LC(*s)
- );
- case NALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- !swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- !isALNUM(*s)
- );
- case NALNUML:
- REXEC_FBC_CSCAN_TAINT(
- !isALNUM_LC_utf8((U8*)s),
- !isALNUM_LC(*s)
- );
- case SPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- *s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8),
- isSPACE(*s)
- );
- case SPACEL:
- REXEC_FBC_CSCAN_TAINT(
- *s == ' ' || isSPACE_LC_utf8((U8*)s),
- isSPACE_LC(*s)
- );
- case NSPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- !(*s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8)),
- !isSPACE(*s)
- );
- case NSPACEL:
- REXEC_FBC_CSCAN_TAINT(
- !(*s == ' ' || isSPACE_LC_utf8((U8*)s)),
- !isSPACE_LC(*s)
- );
- case DIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- isDIGIT(*s)
- );
- case DIGITL:
- REXEC_FBC_CSCAN_TAINT(
- isDIGIT_LC_utf8((U8*)s),
- isDIGIT_LC(*s)
- );
- case NDIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- !swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- !isDIGIT(*s)
- );
- case NDIGITL:
- REXEC_FBC_CSCAN_TAINT(
- !isDIGIT_LC_utf8((U8*)s),
- !isDIGIT_LC(*s)
- );
- case LNBREAK:
- REXEC_FBC_CSCAN(
- is_LNBREAK_utf8(s),
- is_LNBREAK_latin1(s)
- );
- case VERTWS:
- REXEC_FBC_CSCAN(
- is_VERTWS_utf8(s),
- is_VERTWS_latin1(s)
- );
- case NVERTWS:
- REXEC_FBC_CSCAN(
- !is_VERTWS_utf8(s),
- !is_VERTWS_latin1(s)
- );
- case HORIZWS:
- REXEC_FBC_CSCAN(
- is_HORIZWS_utf8(s),
- is_HORIZWS_latin1(s)
- );
- case NHORIZWS:
- REXEC_FBC_CSCAN(
- !is_HORIZWS_utf8(s),
- !is_HORIZWS_latin1(s)
- );
- case AHOCORASICKC:
- case AHOCORASICK:
- {
- DECL_TRIE_TYPE(c);
- /* what trie are we using right now */
- reg_ac_data *aho
- = (reg_ac_data*)progi->data->data[ ARG( c ) ];
- reg_trie_data *trie
- = (reg_trie_data*)progi->data->data[ aho->trie ];
- HV *widecharmap = MUTABLE_HV(progi->data->data[ aho->trie + 1 ]);
-
- const char *last_start = strend - trie->minlen;
-#ifdef DEBUGGING
- const char *real_start = s;
-#endif
- STRLEN maxlen = trie->maxlen;
- SV *sv_points;
- U8 **points; /* map of where we were in the input string
- when reading a given char. For ASCII this
- is unnecessary overhead as the relationship
- is always 1:1, but for Unicode, especially
- case folded Unicode this is not true. */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- U8 *bitmap=NULL;
-
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- /* We can't just allocate points here. We need to wrap it in
- * an SV so it gets freed properly if there is a croak while
- * running the match */
- ENTER;
- SAVETMPS;
- sv_points=newSV(maxlen * sizeof(U8 *));
- SvCUR_set(sv_points,
- maxlen * sizeof(U8 *));
- SvPOK_on(sv_points);
- sv_2mortal(sv_points);
- points=(U8**)SvPV_nolen(sv_points );
- if ( trie_type != trie_utf8_fold
- && (trie->bitmap || OP(c)==AHOCORASICKC) )
- {
- if (trie->bitmap)
- bitmap=(U8*)trie->bitmap;
- else
- bitmap=(U8*)ANYOF_BITMAP(c);
- }
- /* this is the Aho-Corasick algorithm modified a touch
- to include special handling for long "unknown char"
- sequences. The basic idea being that we use AC as long
- as we are dealing with a possible matching char, when
- we encounter an unknown char (and we have not encountered
- an accepting state) we scan forward until we find a legal
- starting char.
- AC matching is basically that of trie matching, except
- that when we encounter a failing transition, we fall back
- to the current states "fail state", and try the current char
- again, a process we repeat until we reach the root state,
- state 1, or a legal transition. If we fail on the root state
- then we can either terminate if we have reached an accepting
- state previously, or restart the entire process from the beginning
- if we have not.
-
- */
- while (s <= last_start) {
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- U8 *uc = (U8*)s;
- U16 charid = 0;
- U32 base = 1;
- U32 state = 1;
- UV uvc = 0;
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- U8 *leftmost = NULL;
-#ifdef DEBUGGING
- U32 accepted_word= 0;
-#endif
- U32 pointpos = 0;
-
- while ( state && uc <= (U8*)strend ) {
- int failed=0;
- U32 word = aho->states[ state ].wordnum;
-
- if( state==1 ) {
- if ( bitmap ) {
- DEBUG_TRIE_EXECUTE_r(
- if ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- dump_exec_pos( (char *)uc, c, strend, real_start,
- (char *)uc, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- " Scanning for legal start char...\n");
- }
- );
- while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- uc++;
- }
- s= (char *)uc;
- }
- if (uc >(U8*)last_start) break;
- }
-
- if ( word ) {
- U8 *lpos= points[ (pointpos - trie->wordlen[word-1] ) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=word);
- leftmost= lpos;
- }
- if (base==0) break;
-
- }
- points[pointpos++ % maxlen]= uc;
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
- DEBUG_TRIE_EXECUTE_r({
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf(Perl_debug_log,
- " Charid:%3u CP:%4"UVxf" ",
- charid, uvc);
- });
-
- do {
-#ifdef DEBUGGING
- word = aho->states[ state ].wordnum;
-#endif
- base = aho->states[ state ].trans.base;
-
- DEBUG_TRIE_EXECUTE_r({
- if (failed)
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%sState: %4"UVxf", word=%"UVxf,
- failed ? " Fail transition to " : "",
- (UV)state, (UV)word);
- });
- if ( base ) {
- U32 tmp;
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state
- && (tmp=trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next))
- {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - legal\n"));
- state = tmp;
- break;
- }
- else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - fail\n"));
- failed = 1;
- state = aho->fail[state];
- }
- }
- else {
- /* we must be accepting here */
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - accepting\n"));
- failed = 1;
- break;
- }
- } while(state);
- uc += len;
- if (failed) {
- if (leftmost)
- break;
- if (!state) state = 1;
- }
- }
- if ( aho->states[ state ].wordnum ) {
- U8 *lpos = points[ (pointpos - trie->wordlen[aho->states[ state ].wordnum-1]) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=aho->states[ state ].wordnum);
- leftmost = lpos;
- }
- }
- if (leftmost) {
- s = (char*)leftmost;
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf(
- Perl_debug_log,"Matches word #%"UVxf" at position %"IVdf". Trying full pattern...\n",
- (UV)accepted_word, (IV)(s - real_start)
- );
- });
- if (!reginfo || regtry(reginfo, &s)) {
- FREETMPS;
- LEAVE;
- goto got_it;
- }
- s = HOPc(s,1);
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,"Pattern failed. Looking for new start point...\n");
- });
- } else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,"No match.\n"));
- break;
- }
- }
- FREETMPS;
- LEAVE;
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c));
- break;
- }
- return 0;
- got_it:
- return s;
-}
-
-
-/*
- - regexec_flags - match a regexp against a string
- */
-I32
-Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, register char *strend,
- char *strbeg, I32 minend, SV *sv, void *data, U32 flags)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* data: May be used for some additional optimizations.
- Currently its only used, with a U32 cast, for transmitting
- the ganch offset when doing a /g match. This will change */
-/* nosave: For optimizations. */
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- /*register*/ char *s;
- register regnode *c;
- /*register*/ char *startpos = stringarg;
- I32 minlen; /* must match at least this many chars */
- I32 dontbother = 0; /* how many characters not to try at end */
- I32 end_shift = 0; /* Same for the end. */ /* CC */
- I32 scream_pos = -1; /* Internal iterator of scream. */
- char *scream_olds = NULL;
- const bool do_utf8 = (bool)DO_UTF8(sv);
- I32 multiline;
- RXi_GET_DECL(prog,progi);
- regmatch_info reginfo; /* create some info to pass to regtry etc */
- regexp_paren_pair *swap = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGEXEC_FLAGS;
- PERL_UNUSED_ARG(data);
-
- /* Be paranoid... */
- if (prog == NULL || startpos == NULL) {
- Perl_croak(aTHX_ "NULL regexp parameter");
- return 0;
- }
-
- multiline = prog->extflags & RXf_PMf_MULTILINE;
- reginfo.prog = rx; /* Yes, sorry that this is confusing. */
-
- RX_MATCH_UTF8_set(rx, do_utf8);
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, startpos, strend,
- "Matching");
- );
-
- minlen = prog->minlen;
-
- if (strend - startpos < (minlen+(prog->check_offset_min<0?prog->check_offset_min:0))) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short [regexec_flags]...\n"));
- goto phooey;
- }
-
-
- /* Check validity of program. */
- if (UCHARAT(progi->program) != REG_MAGIC) {
- Perl_croak(aTHX_ "corrupted regexp program");
- }
-
- PL_reg_flags = 0;
- PL_reg_eval_set = 0;
- PL_reg_maxiter = 0;
-
- if (RX_UTF8(rx))
- PL_reg_flags |= RF_utf8;
-
- /* Mark beginning of line for ^ and lookbehind. */
- reginfo.bol = startpos; /* XXX not used ??? */
- PL_bostr = strbeg;
- reginfo.sv = sv;
-
- /* Mark end of line for $ (and such) */
- PL_regeol = strend;
-
- /* see how far we have to get to not match where we matched before */
- reginfo.till = startpos+minend;
-
- /* If there is a "must appear" string, look for it. */
- s = startpos;
-
- if (prog->extflags & RXf_GPOS_SEEN) { /* Need to set reginfo->ganch */
- MAGIC *mg;
- if (flags & REXEC_IGNOREPOS){ /* Means: check only at start */
- reginfo.ganch = startpos + prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS IGNOREPOS: reginfo.ganch = startpos + %"UVxf"\n",(UV)prog->gofs));
- } else if (sv && SvTYPE(sv) >= SVt_PVMG
- && SvMAGIC(sv)
- && (mg = mg_find(sv, PERL_MAGIC_regex_global))
- && mg->mg_len >= 0) {
- reginfo.ganch = strbeg + mg->mg_len; /* Defined pos() */
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS MAGIC: reginfo.ganch = strbeg + %"IVdf"\n",(IV)mg->mg_len));
-
- if (prog->extflags & RXf_ANCH_GPOS) {
- if (s > reginfo.ganch)
- goto phooey;
- s = reginfo.ganch - prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS ANCH_GPOS: s = ganch - %"UVxf"\n",(UV)prog->gofs));
- if (s < strbeg)
- goto phooey;
- }
- }
- else if (data) {
- reginfo.ganch = strbeg + PTR2UV(data);
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS DATA: reginfo.ganch= strbeg + %"UVxf"\n",PTR2UV(data)));
-
- } else { /* pos() not defined */
- reginfo.ganch = strbeg;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS: reginfo.ganch = strbeg\n"));
- }
- }
- if (PL_curpm && (PM_GETRE(PL_curpm) == rx)) {
- /* We have to be careful. If the previous successful match
- was from this regex we don't want a subsequent partially
- successful match to clobber the old results.
- So when we detect this possibility we add a swap buffer
- to the re, and switch the buffer each match. If we fail
- we switch it back, otherwise we leave it swapped.
- */
- swap = prog->offs;
- /* do we need a save destructor here for eval dies? */
- Newxz(prog->offs, (prog->nparens + 1), regexp_paren_pair);
- }
- if (!(flags & REXEC_CHECKED) && (prog->check_substr != NULL || prog->check_utf8 != NULL)) {
- re_scream_pos_data d;
-
- d.scream_olds = &scream_olds;
- d.scream_pos = &scream_pos;
- s = re_intuit_start(rx, sv, s, strend, flags, &d);
- if (!s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not present...\n"));
- goto phooey; /* not present */
- }
- }
-
-
-
- /* Simplest case: anchored match need be tried only once. */
- /* [unless only anchor is BOL and multiline is set] */
- if (prog->extflags & (RXf_ANCH & ~RXf_ANCH_GPOS)) {
- if (s == startpos && regtry(®info, &startpos))
- goto got_it;
- else if (multiline || (prog->intflags & PREGf_IMPLICIT)
- || (prog->extflags & RXf_ANCH_MBOL)) /* XXXX SBOL? */
- {
- char *end;
-
- if (minlen)
- dontbother = minlen - 1;
- end = HOP3c(strend, -dontbother, strbeg) - 1;
- /* for multiline we only have to try after newlines */
- if (prog->check_substr || prog->check_utf8) {
- if (s == startpos)
- goto after_try;
- while (1) {
- if (regtry(®info, &s))
- goto got_it;
- after_try:
- if (s > end)
- goto phooey;
- if (prog->extflags & RXf_USE_INTUIT) {
- s = re_intuit_start(rx, sv, s + 1, strend, flags, NULL);
- if (!s)
- goto phooey;
- }
- else
- s++;
- }
- } else {
- if (s > startpos)
- s--;
- while (s < end) {
- if (*s++ == '\n') { /* don't need PL_utf8skip here */
- if (regtry(®info, &s))
- goto got_it;
- }
- }
- }
- }
- goto phooey;
- } else if (RXf_GPOS_CHECK == (prog->extflags & RXf_GPOS_CHECK))
- {
- /* the warning about reginfo.ganch being used without intialization
- is bogus -- we set it above, when prog->extflags & RXf_GPOS_SEEN
- and we only enter this block when the same bit is set. */
- char *tmp_s = reginfo.ganch - prog->gofs;
-
- if (tmp_s >= strbeg && regtry(®info, &tmp_s))
- goto got_it;
- goto phooey;
- }
-
- /* Messy cases: unanchored match. */
- if ((prog->anchored_substr || prog->anchored_utf8) && prog->intflags & PREGf_SKIP) {
- /* we have /x+whatever/ */
- /* it must be a one character string (XXXX Except UTF?) */
- char ch;
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- ch = SvPVX_const(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)[0];
-
- if (do_utf8) {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s += UTF8SKIP(s);
- while (s < strend && *s == ch)
- s += UTF8SKIP(s);
- }
- );
- }
- else {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s++;
- while (s < strend && *s == ch)
- s++;
- }
- );
- }
- DEBUG_EXECUTE_r(if (!did_match)
- PerlIO_printf(Perl_debug_log,
- "Did not find anchored character...\n")
- );
- }
- else if (prog->anchored_substr != NULL
- || prog->anchored_utf8 != NULL
- || ((prog->float_substr != NULL || prog->float_utf8 != NULL)
- && prog->float_max_offset < strend - s)) {
- SV *must;
- I32 back_max;
- I32 back_min;
- char *last;
- char *last1; /* Last position checked before */
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (prog->anchored_substr || prog->anchored_utf8) {
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- back_max = back_min = prog->anchored_offset;
- } else {
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- back_max = prog->float_max_offset;
- back_min = prog->float_min_offset;
- }
-
-
- if (must == &PL_sv_undef)
- /* could not downgrade utf8 check substring, so must fail */
- goto phooey;
-
- if (back_min<0) {
- last = strend;
- } else {
- last = HOP3c(strend, /* Cannot start after this */
- -(I32)(CHR_SVLEN(must)
- - (SvTAIL(must) != 0) + back_min), strbeg);
- }
- if (s > PL_bostr)
- last1 = HOPc(s, -1);
- else
- last1 = s - 1; /* bogus */
-
- /* XXXX check_substr already used to find "s", can optimize if
- check_substr==must. */
- scream_pos = -1;
- dontbother = end_shift;
- strend = HOPc(strend, -dontbother);
- while ( (s <= last) &&
- ((flags & REXEC_SCREAM)
- ? (s = screaminstr(sv, must, HOP3c(s, back_min, (back_min<0 ? strbeg : strend)) - strbeg,
- end_shift, &scream_pos, 0))
- : (s = fbm_instr((unsigned char*)HOP3(s, back_min, (back_min<0 ? strbeg : strend)),
- (unsigned char*)strend, must,
- multiline ? FBMrf_MULTILINE : 0))) ) {
- /* we may be pointing at the wrong string */
- if ((flags & REXEC_SCREAM) && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- DEBUG_EXECUTE_r( did_match = 1 );
- if (HOPc(s, -back_max) > last1) {
- last1 = HOPc(s, -back_min);
- s = HOPc(s, -back_max);
- }
- else {
- char * const t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1;
-
- last1 = HOPc(s, -back_min);
- s = t;
- }
- if (do_utf8) {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s += UTF8SKIP(s);
- }
- }
- else {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s++;
- }
- }
- }
- DEBUG_EXECUTE_r(if (!did_match) {
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "Did not find %s substr %s%s...\n",
- ((must == prog->anchored_substr || must == prog->anchored_utf8)
- ? "anchored" : "floating"),
- quoted, RE_SV_TAIL(must));
- });
- goto phooey;
- }
- else if ( (c = progi->regstclass) ) {
- if (minlen) {
- const OPCODE op = OP(progi->regstclass);
- /* don't bother with what can't match */
- if (PL_regkind[op] != EXACT && op != CANY && PL_regkind[op] != TRIE)
- strend = HOPc(strend, -(minlen - 1));
- }
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, c);
- {
- RE_PV_QUOTED_DECL(quoted,do_utf8,PERL_DEBUG_PAD_ZERO(1),
- s,strend-s,60);
- PerlIO_printf(Perl_debug_log,
- "Matching stclass %.*s against %s (%d chars)\n",
- (int)SvCUR(prop), SvPVX_const(prop),
- quoted, (int)(strend - s));
- }
- });
- if (find_byclass(prog, c, s, strend, ®info))
- goto got_it;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass... [regexec_flags]\n"));
- }
- else {
- dontbother = 0;
- if (prog->float_substr != NULL || prog->float_utf8 != NULL) {
- /* Trim the end. */
- char *last;
- SV* float_real;
-
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- float_real = do_utf8 ? prog->float_utf8 : prog->float_substr;
-
- if (flags & REXEC_SCREAM) {
- last = screaminstr(sv, float_real, s - strbeg,
- end_shift, &scream_pos, 1); /* last one */
- if (!last)
- last = scream_olds; /* Only one occurrence. */
- /* we may be pointing at the wrong string */
- else if (RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- }
- else {
- STRLEN len;
- const char * const little = SvPV_const(float_real, len);
-
- if (SvTAIL(float_real)) {
- if (memEQ(strend - len + 1, little, len - 1))
- last = strend - len + 1;
- else if (!multiline)
- last = memEQ(strend - len, little, len)
- ? strend - len : NULL;
- else
- goto find_last;
- } else {
- find_last:
- if (len)
- last = rninstr(s, strend, little, little + len);
- else
- last = strend; /* matching "$" */
- }
- }
- if (last == NULL) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%sCan't trim the tail, match fails (should not happen)%s\n",
- PL_colors[4], PL_colors[5]));
- goto phooey; /* Should not happen! */
- }
- dontbother = strend - last + prog->float_min_offset;
- }
- if (minlen && (dontbother < minlen))
- dontbother = minlen - 1;
- strend -= dontbother; /* this one's always in bytes! */
- /* We don't know much -- general case. */
- if (do_utf8) {
- for (;;) {
- if (regtry(®info, &s))
- goto got_it;
- if (s >= strend)
- break;
- s += UTF8SKIP(s);
- };
- }
- else {
- do {
- if (regtry(®info, &s))
- goto got_it;
- } while (s++ < strend);
- }
- }
-
- /* Failure. */
- goto phooey;
-
-got_it:
- Safefree(swap);
- RX_MATCH_TAINTED_set(rx, PL_reg_flags & RF_tainted);
-
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (RXp_PAREN_NAMES(prog))
- (void)hv_iterinit(RXp_PAREN_NAMES(prog));
-
- /* make sure $`, $&, $', and $digit will work later */
- if ( !(flags & REXEC_NOT_FIRST) ) {
- RX_MATCH_COPY_FREE(rx);
- if (flags & REXEC_COPY_STR) {
- const I32 i = PL_regeol - startpos + (stringarg - strbeg);
-#ifdef PERL_OLD_COPY_ON_WRITE
- if ((SvIsCOW(sv)
- || (SvFLAGS(sv) & CAN_COW_MASK) == CAN_COW_FLAGS)) {
- if (DEBUG_C_TEST) {
- PerlIO_printf(Perl_debug_log,
- "Copy on write: regexp capture, type %d\n",
- (int) SvTYPE(sv));
- }
- prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv);
- prog->subbeg = (char *)SvPVX_const(prog->saved_copy);
- assert (SvPOKp(prog->saved_copy));
- } else
-#endif
- {
- RX_MATCH_COPIED_on(rx);
- s = savepvn(strbeg, i);
- prog->subbeg = s;
- }
- prog->sublen = i;
- }
- else {
- prog->subbeg = strbeg;
- prog->sublen = PL_regeol - strbeg; /* strend may have been modified */
- }
- }
-
- return 1;
-
-phooey:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n",
- PL_colors[4], PL_colors[5]));
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (swap) {
- /* we failed :-( roll it back */
- Safefree(prog->offs);
- prog->offs = swap;
- }
-
- return 0;
-}
-
-
-/*
- - regtry - try match at specific point
- */
-STATIC I32 /* 0 failure, 1 success */
-S_regtry(pTHX_ regmatch_info *reginfo, char **startpos)
-{
- dVAR;
- CHECKPOINT lastcp;
- REGEXP *const rx = reginfo->prog;
- regexp *const prog = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTRY;
-
- reginfo->cutpoint=NULL;
-
- if ((prog->extflags & RXf_EVAL_SEEN) && !PL_reg_eval_set) {
- MAGIC *mg;
-
- PL_reg_eval_set = RS_init;
- DEBUG_EXECUTE_r(DEBUG_s(
- PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n",
- (IV)(PL_stack_sp - PL_stack_base));
- ));
- SAVESTACK_CXPOS();
- cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base;
- /* Otherwise OP_NEXTSTATE will free whatever on stack now. */
- SAVETMPS;
- /* Apparently this is not needed, judging by wantarray. */
- /* SAVEI8(cxstack[cxstack_ix].blk_gimme);
- cxstack[cxstack_ix].blk_gimme = G_SCALAR; */
-
- if (reginfo->sv) {
- /* Make $_ available to executed code. */
- if (reginfo->sv != DEFSV) {
- SAVE_DEFSV;
- DEFSV_set(reginfo->sv);
- }
-
- if (!(SvTYPE(reginfo->sv) >= SVt_PVMG && SvMAGIC(reginfo->sv)
- && (mg = mg_find(reginfo->sv, PERL_MAGIC_regex_global)))) {
- /* prepare for quick setting of pos */
-#ifdef PERL_OLD_COPY_ON_WRITE
- if (SvIsCOW(reginfo->sv))
- sv_force_normal_flags(reginfo->sv, 0);
-#endif
- mg = sv_magicext(reginfo->sv, NULL, PERL_MAGIC_regex_global,
- &PL_vtbl_mglob, NULL, 0);
- mg->mg_len = -1;
- }
- PL_reg_magic = mg;
- PL_reg_oldpos = mg->mg_len;
- SAVEDESTRUCTOR_X(restore_pos, prog);
- }
- if (!PL_reg_curpm) {
- Newxz(PL_reg_curpm, 1, PMOP);
-#ifdef USE_ITHREADS
- {
- SV* const repointer = &PL_sv_undef;
- /* this regexp is also owned by the new PL_reg_curpm, which
- will try to free it. */
- av_push(PL_regex_padav, repointer);
- PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav);
- PL_regex_pad = AvARRAY(PL_regex_padav);
- }
-#endif
- }
-#ifdef USE_ITHREADS
- /* It seems that non-ithreads works both with and without this code.
- So for efficiency reasons it seems best not to have the code
- compiled when it is not needed. */
- /* This is safe against NULLs: */
- ReREFCNT_dec(PM_GETRE(PL_reg_curpm));
- /* PM_reg_curpm owns a reference to this regexp. */
- ReREFCNT_inc(rx);
-#endif
- PM_SETRE(PL_reg_curpm, rx);
- PL_reg_oldcurpm = PL_curpm;
- PL_curpm = PL_reg_curpm;
- if (RXp_MATCH_COPIED(prog)) {
- /* Here is a serious problem: we cannot rewrite subbeg,
- since it may be needed if this match fails. Thus
- $` inside (?{}) could fail... */
- PL_reg_oldsaved = prog->subbeg;
- PL_reg_oldsavedlen = prog->sublen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = prog->saved_copy;
-#endif
- RXp_MATCH_COPIED_off(prog);
- }
- else
- PL_reg_oldsaved = NULL;
- prog->subbeg = PL_bostr;
- prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */
- }
- DEBUG_EXECUTE_r(PL_reg_starttry = *startpos);
- prog->offs[0].start = *startpos - PL_bostr;
- PL_reginput = *startpos;
- PL_reglastparen = &prog->lastparen;
- PL_reglastcloseparen = &prog->lastcloseparen;
- prog->lastparen = 0;
- prog->lastcloseparen = 0;
- PL_regsize = 0;
- PL_regoffs = prog->offs;
- if (PL_reg_start_tmpl <= prog->nparens) {
- PL_reg_start_tmpl = prog->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- /* XXXX What this code is doing here?!!! There should be no need
- to do this again and again, PL_reglastparen should take care of
- this! --ilya*/
-
- /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code.
- * Actually, the code in regcppop() (which Ilya may be meaning by
- * PL_reglastparen), is not needed at all by the test suite
- * (op/regexp, op/pat, op/split), but that code is needed otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * Meanwhile, this code *is* needed for the
- * above-mentioned test suite tests to succeed. The common theme
- * on those tests seems to be returning null fields from matches.
- * --jhi updated by dapm */
-#if 1
- if (prog->nparens) {
- regexp_paren_pair *pp = PL_regoffs;
- register I32 i;
- for (i = prog->nparens; i > (I32)*PL_reglastparen; i--) {
- ++pp;
- pp->start = -1;
- pp->end = -1;
- }
- }
-#endif
- REGCP_SET(lastcp);
- if (regmatch(reginfo, progi->program + 1)) {
- PL_regoffs[0].end = PL_reginput - PL_bostr;
- return 1;
- }
- if (reginfo->cutpoint)
- *startpos= reginfo->cutpoint;
- REGCP_UNWIND(lastcp);
- return 0;
-}
-
-
-#define sayYES goto yes
-#define sayNO goto no
-#define sayNO_SILENT goto no_silent
-
-/* we dont use STMT_START/END here because it leads to
- "unreachable code" warnings, which are bogus, but distracting. */
-#define CACHEsayNO \
- if (ST.cache_mask) \
- PL_reg_poscache[ST.cache_offset] |= ST.cache_mask; \
- sayNO
-
-/* this is used to determine how far from the left messages like
- 'failed...' are printed. It should be set such that messages
- are inline with the regop output that created them.
-*/
-#define REPORT_CODE_OFF 32
-
-
-/* Make sure there is a test for this +1 options in re_tests */
-#define TRIE_INITAL_ACCEPT_BUFFLEN 4;
-
-#define CHRTEST_UNINIT -1001 /* c1/c2 haven't been calculated yet */
-#define CHRTEST_VOID -1000 /* the c1/c2 "next char" test should be skipped */
-
-#define SLAB_FIRST(s) (&(s)->states[0])
-#define SLAB_LAST(s) (&(s)->states[PERL_REGMATCH_SLAB_SLOTS-1])
-
-/* grab a new slab and return the first slot in it */
-
-STATIC regmatch_state *
-S_push_slab(pTHX)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- regmatch_slab *s = PL_regmatch_slab->next;
- if (!s) {
- Newx(s, 1, regmatch_slab);
- s->prev = PL_regmatch_slab;
- s->next = NULL;
- PL_regmatch_slab->next = s;
- }
- PL_regmatch_slab = s;
- return SLAB_FIRST(s);
-}
-
-
-/* push a new state then goto it */
-
-#define PUSH_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_state;
-
-/* push a new state with success backtracking, then goto it */
-
-#define PUSH_YES_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_yes_state;
-
-
-
-/*
-
-regmatch() - main matching routine
-
-This is basically one big switch statement in a loop. We execute an op,
-set 'next' to point the next op, and continue. If we come to a point which
-we may need to backtrack to on failure such as (A|B|C), we push a
-backtrack state onto the backtrack stack. On failure, we pop the top
-state, and re-enter the loop at the state indicated. If there are no more
-states to pop, we return failure.
-
-Sometimes we also need to backtrack on success; for example /A+/, where
-after successfully matching one A, we need to go back and try to
-match another one; similarly for lookahead assertions: if the assertion
-completes successfully, we backtrack to the state just before the assertion
-and then carry on. In these cases, the pushed state is marked as
-'backtrack on success too'. This marking is in fact done by a chain of
-pointers, each pointing to the previous 'yes' state. On success, we pop to
-the nearest yes state, discarding any intermediate failure-only states.
-Sometimes a yes state is pushed just to force some cleanup code to be
-called at the end of a successful match or submatch; e.g. (??{$re}) uses
-it to free the inner regex.
-
-Note that failure backtracking rewinds the cursor position, while
-success backtracking leaves it alone.
-
-A pattern is complete when the END op is executed, while a subpattern
-such as (?=foo) is complete when the SUCCESS op is executed. Both of these
-ops trigger the "pop to last yes state if any, otherwise return true"
-behaviour.
-
-A common convention in this function is to use A and B to refer to the two
-subpatterns (or to the first nodes thereof) in patterns like /A*B/: so A is
-the subpattern to be matched possibly multiple times, while B is the entire
-rest of the pattern. Variable and state names reflect this convention.
-
-The states in the main switch are the union of ops and failure/success of
-substates associated with with that op. For example, IFMATCH is the op
-that does lookahead assertions /(?=A)B/ and so the IFMATCH state means
-'execute IFMATCH'; while IFMATCH_A is a state saying that we have just
-successfully matched A and IFMATCH_A_fail is a state saying that we have
-just failed to match A. Resume states always come in pairs. The backtrack
-state we push is marked as 'IFMATCH_A', but when that is popped, we resume
-at IFMATCH_A or IFMATCH_A_fail, depending on whether we are backtracking
-on success or failure.
-
-The struct that holds a backtracking state is actually a big union, with
-one variant for each major type of op. The variable st points to the
-top-most backtrack struct. To make the code clearer, within each
-block of code we #define ST to alias the relevant union.
-
-Here's a concrete example of a (vastly oversimplified) IFMATCH
-implementation:
-
- switch (state) {
- ....
-
-#define ST st->u.ifmatch
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- ST.foo = ...; // some state we wish to save
- ...
- // push a yes backtrack state with a resume value of
- // IFMATCH_A/IFMATCH_A_fail, then continue execution at the
- // first node of A:
- PUSH_YES_STATE_GOTO(IFMATCH_A, A);
- // NOTREACHED
-
- case IFMATCH_A: // we have successfully executed A; now continue with B
- next = B;
- bar = ST.foo; // do something with the preserved value
- break;
-
- case IFMATCH_A_fail: // A failed, so the assertion failed
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
-
-#undef ST
-
- ...
- }
-
-For any old-timers reading this who are familiar with the old recursive
-approach, the code above is equivalent to:
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- {
- int foo = ...
- ...
- if (regmatch(A)) {
- next = B;
- bar = foo;
- break;
- }
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
- }
-
-The topmost backtrack state, pointed to by st, is usually free. If you
-want to claim it, populate any ST.foo fields in it with values you wish to
-save, then do one of
-
- PUSH_STATE_GOTO(resume_state, node);
- PUSH_YES_STATE_GOTO(resume_state, node);
-
-which sets that backtrack state's resume value to 'resume_state', pushes a
-new free entry to the top of the backtrack stack, then goes to 'node'.
-On backtracking, the free slot is popped, and the saved state becomes the
-new free state. An ST.foo field in this new top state can be temporarily
-accessed to retrieve values, but once the main loop is re-entered, it
-becomes available for reuse.
-
-Note that the depth of the backtrack stack constantly increases during the
-left-to-right execution of the pattern, rather than going up and down with
-the pattern nesting. For example the stack is at its maximum at Z at the
-end of the pattern, rather than at X in the following:
-
- /(((X)+)+)+....(Y)+....Z/
-
-The only exceptions to this are lookahead/behind assertions and the cut,
-(?>A), which pop all the backtrack states associated with A before
-continuing.
-
-Bascktrack state structs are allocated in slabs of about 4K in size.
-PL_regmatch_state and st always point to the currently active state,
-and PL_regmatch_slab points to the slab currently containing
-PL_regmatch_state. The first time regmatch() is called, the first slab is
-allocated, and is never freed until interpreter destruction. When the slab
-is full, a new one is allocated and chained to the end. At exit from
-regmatch(), slabs allocated since entry are freed.
-
-*/
-
-
-#define DEBUG_STATE_pp(pp) \
- DEBUG_STATE_r({ \
- DUMP_EXEC_POS(locinput, scan, do_utf8); \
- PerlIO_printf(Perl_debug_log, \
- " %*s"pp" %s%s%s%s%s\n", \
- depth*2, "", \
- PL_reg_name[st->resume_state], \
- ((st==yes_state||st==mark_state) ? "[" : ""), \
- ((st==yes_state) ? "Y" : ""), \
- ((st==mark_state) ? "M" : ""), \
- ((st==yes_state||st==mark_state) ? "]" : "") \
- ); \
- });
-
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-prog) : -1)
-
-#ifdef DEBUGGING
-
-STATIC void
-S_debug_start_match(pTHX_ const REGEXP *prog, const bool do_utf8,
- const char *start, const char *end, const char *blurb)
-{
- const bool utf8_pat = RX_UTF8(prog) ? 1 : 0;
-
- PERL_ARGS_ASSERT_DEBUG_START_MATCH;
-
- if (!PL_colorset)
- reginitcolors();
- {
- RE_PV_QUOTED_DECL(s0, utf8_pat, PERL_DEBUG_PAD_ZERO(0),
- RX_PRECOMP_const(prog), RX_PRELEN(prog), 60);
-
- RE_PV_QUOTED_DECL(s1, do_utf8, PERL_DEBUG_PAD_ZERO(1),
- start, end - start, 60);
-
- PerlIO_printf(Perl_debug_log,
- "%s%s REx%s %s against %s\n",
- PL_colors[4], blurb, PL_colors[5], s0, s1);
-
- if (do_utf8||utf8_pat)
- PerlIO_printf(Perl_debug_log, "UTF-8 %s%s%s...\n",
- utf8_pat ? "pattern" : "",
- utf8_pat && do_utf8 ? " and " : "",
- do_utf8 ? "string" : ""
- );
- }
-}
-
-STATIC void
-S_dump_exec_pos(pTHX_ const char *locinput,
- const regnode *scan,
- const char *loc_regeol,
- const char *loc_bostr,
- const char *loc_reg_starttry,
- const bool do_utf8)
-{
- const int docolor = *PL_colors[0] || *PL_colors[2] || *PL_colors[4];
- const int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */
- int l = (loc_regeol - locinput) > taill ? taill : (loc_regeol - locinput);
- /* The part of the string before starttry has one color
- (pref0_len chars), between starttry and current
- position another one (pref_len - pref0_len chars),
- after the current position the third one.
- We assume that pref0_len <= pref_len, otherwise we
- decrease pref0_len. */
- int pref_len = (locinput - loc_bostr) > (5 + taill) - l
- ? (5 + taill) - l : locinput - loc_bostr;
- int pref0_len;
-
- PERL_ARGS_ASSERT_DUMP_EXEC_POS;
-
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len)))
- pref_len++;
- pref0_len = pref_len - (locinput - loc_reg_starttry);
- if (l + pref_len < (5 + taill) && l < loc_regeol - locinput)
- l = ( loc_regeol - locinput > (5 + taill) - pref_len
- ? (5 + taill) - pref_len : loc_regeol - locinput);
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput + l)))
- l--;
- if (pref0_len < 0)
- pref0_len = 0;
- if (pref0_len > pref_len)
- pref0_len = pref_len;
- {
- const int is_uni = (do_utf8 && OP(scan) != CANY) ? 1 : 0;
-
- RE_PV_COLOR_DECL(s0,len0,is_uni,PERL_DEBUG_PAD(0),
- (locinput - pref_len),pref0_len, 60, 4, 5);
-
- RE_PV_COLOR_DECL(s1,len1,is_uni,PERL_DEBUG_PAD(1),
- (locinput - pref_len + pref0_len),
- pref_len - pref0_len, 60, 2, 3);
-
- RE_PV_COLOR_DECL(s2,len2,is_uni,PERL_DEBUG_PAD(2),
- locinput, loc_regeol - locinput, 10, 0, 1);
-
- const STRLEN tlen=len0+len1+len2;
- PerlIO_printf(Perl_debug_log,
- "%4"IVdf" <%.*s%.*s%s%.*s>%*s|",
- (IV)(locinput - loc_bostr),
- len0, s0,
- len1, s1,
- (docolor ? "" : "> <"),
- len2, s2,
- (int)(tlen > 19 ? 0 : 19 - tlen),
- "");
- }
-}
-
-#endif
-
-/* reg_check_named_buff_matched()
- * Checks to see if a named buffer has matched. The data array of
- * buffer numbers corresponding to the buffer is expected to reside
- * in the regexp->data->data array in the slot stored in the ARG() of
- * node involved. Note that this routine doesn't actually care about the
- * name, that information is not preserved from compilation to execution.
- * Returns the index of the leftmost defined buffer with the given name
- * or 0 if non of the buffers matched.
- */
-STATIC I32
-S_reg_check_named_buff_matched(pTHX_ const regexp *rex, const regnode *scan)
-{
- I32 n;
- RXi_GET_DECL(rex,rexi);
- SV *sv_dat= MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
-
- PERL_ARGS_ASSERT_REG_CHECK_NAMED_BUFF_MATCHED;
-
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- if ((I32)*PL_reglastparen >= nums[n] &&
- PL_regoffs[nums[n]].end != -1)
- {
- return nums[n];
- }
- }
- return 0;
-}
-
-
-/* free all slabs above current one - called during LEAVE_SCOPE */
-
-STATIC void
-S_clear_backtrack_stack(pTHX_ void *p)
-{
- regmatch_slab *s = PL_regmatch_slab->next;
- PERL_UNUSED_ARG(p);
-
- if (!s)
- return;
- PL_regmatch_slab->next = NULL;
- while (s) {
- regmatch_slab * const osl = s;
- s = s->next;
- Safefree(osl);
- }
-}
-
-
-#define SETREX(Re1,Re2) \
- if (PL_reg_eval_set) PM_SETRE((PL_reg_curpm), (Re2)); \
- Re1 = (Re2)
-
-STATIC I32 /* 0 failure, 1 success */
-S_regmatch(pTHX_ regmatch_info *reginfo, regnode *prog)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- dVAR;
- register const bool do_utf8 = PL_reg_match_utf8;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- REGEXP *rex_sv = reginfo->prog;
- regexp *rex = (struct regexp *)SvANY(rex_sv);
- RXi_GET_DECL(rex,rexi);
- I32 oldsave;
- /* the current state. This is a cached copy of PL_regmatch_state */
- register regmatch_state *st;
- /* cache heavy used fields of st in registers */
- register regnode *scan;
- register regnode *next;
- register U32 n = 0; /* general value; init to avoid compiler warning */
- register I32 ln = 0; /* len or last; init to avoid compiler warning */
- register char *locinput = PL_reginput;
- register I32 nextchr; /* is always set to UCHARAT(locinput) */
-
- bool result = 0; /* return value of S_regmatch */
- int depth = 0; /* depth of backtrack stack */
- U32 nochange_depth = 0; /* depth of GOSUB recursion with nochange */
- const U32 max_nochange_depth =
- (3 * rex->nparens > MAX_RECURSE_EVAL_NOCHANGE_DEPTH) ?
- 3 * rex->nparens : MAX_RECURSE_EVAL_NOCHANGE_DEPTH;
- regmatch_state *yes_state = NULL; /* state to pop to on success of
- subpattern */
- /* mark_state piggy backs on the yes_state logic so that when we unwind
- the stack on success we can update the mark_state as we go */
- regmatch_state *mark_state = NULL; /* last mark state we have seen */
- regmatch_state *cur_eval = NULL; /* most recent EVAL_AB state */
- struct regmatch_state *cur_curlyx = NULL; /* most recent curlyx */
- U32 state_num;
- bool no_final = 0; /* prevent failure from backtracking? */
- bool do_cutgroup = 0; /* no_final only until next branch/trie entry */
- char *startpoint = PL_reginput;
- SV *popmark = NULL; /* are we looking for a mark? */
- SV *sv_commit = NULL; /* last mark name seen in failure */
- SV *sv_yes_mark = NULL; /* last mark name we have seen
- during a successfull match */
- U32 lastopen = 0; /* last open we saw */
- bool has_cutgroup = RX_HAS_CUTGROUP(rex) ? 1 : 0;
- SV* const oreplsv = GvSV(PL_replgv);
- /* these three flags are set by various ops to signal information to
- * the very next op. They have a useful lifetime of exactly one loop
- * iteration, and are not preserved or restored by state pushes/pops
- */
- bool sw = 0; /* the condition value in (?(cond)a|b) */
- bool minmod = 0; /* the next "{n,m}" is a "{n,m}?" */
- int logical = 0; /* the following EVAL is:
- 0: (?{...})
- 1: (?(?{...})X|Y)
- 2: (??{...})
- or the following IFMATCH/UNLESSM is:
- false: plain (?=foo)
- true: used as a condition: (?(?=foo))
- */
-#ifdef DEBUGGING
- GET_RE_DEBUG_FLAGS_DECL;
-#endif
-
- PERL_ARGS_ASSERT_REGMATCH;
-
- DEBUG_OPTIMISE_r( DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,"regmatch start\n");
- }));
- /* on first ever call to regmatch, allocate first slab */
- if (!PL_regmatch_slab) {
- Newx(PL_regmatch_slab, 1, regmatch_slab);
- PL_regmatch_slab->prev = NULL;
- PL_regmatch_slab->next = NULL;
- PL_regmatch_state = SLAB_FIRST(PL_regmatch_slab);
- }
-
- oldsave = PL_savestack_ix;
- SAVEDESTRUCTOR_X(S_clear_backtrack_stack, NULL);
- SAVEVPTR(PL_regmatch_slab);
- SAVEVPTR(PL_regmatch_state);
-
- /* grab next free state slot */
- st = ++PL_regmatch_state;
- if (st > SLAB_LAST(PL_regmatch_slab))
- st = PL_regmatch_state = S_push_slab(aTHX);
-
- /* Note that nextchr is a byte even in UTF */
- nextchr = UCHARAT(locinput);
- scan = prog;
- while (scan != NULL) {
-
- DEBUG_EXECUTE_r( {
- SV * const prop = sv_newmortal();
- regnode *rnext=regnext(scan);
- DUMP_EXEC_POS( locinput, scan, do_utf8 );
- regprop(rex, prop, scan);
-
- PerlIO_printf(Perl_debug_log,
- "%3"IVdf":%*s%s(%"IVdf")\n",
- (IV)(scan - rexi->program), depth*2, "",
- SvPVX_const(prop),
- (PL_regkind[OP(scan)] == END || !rnext) ?
- 0 : (IV)(rnext - rexi->program));
- });
-
- next = scan + NEXT_OFF(scan);
- if (next == scan)
- next = NULL;
- state_num = OP(scan);
-
- reenter_switch:
-
- assert(PL_reglastparen == &rex->lastparen);
- assert(PL_reglastcloseparen == &rex->lastcloseparen);
- assert(PL_regoffs == rex->offs);
-
- switch (state_num) {
- case BOL:
- if (locinput == PL_bostr)
- {
- /* reginfo->till = reginfo->bol; */
- break;
- }
- sayNO;
- case MBOL:
- if (locinput == PL_bostr ||
- ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n'))
- {
- break;
- }
- sayNO;
- case SBOL:
- if (locinput == PL_bostr)
- break;
- sayNO;
- case GPOS:
- if (locinput == reginfo->ganch)
- break;
- sayNO;
-
- case KEEPS:
- /* update the startpoint */
- st->u.keeper.val = PL_regoffs[0].start;
- PL_reginput = locinput;
- PL_regoffs[0].start = locinput - PL_bostr;
- PUSH_STATE_GOTO(KEEPS_next, next);
- /*NOT-REACHED*/
- case KEEPS_next_fail:
- /* rollback the start point change */
- PL_regoffs[0].start = st->u.keeper.val;
- sayNO_SILENT;
- /*NOT-REACHED*/
- case EOL:
- goto seol;
- case MEOL:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- break;
- case SEOL:
- seol:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- if (PL_regeol - locinput > 1)
- sayNO;
- break;
- case EOS:
- if (PL_regeol != locinput)
- sayNO;
- break;
- case SANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
- case CANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case REG_ANY:
- if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n')
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
-
-#undef ST
-#define ST st->u.trie
- case TRIEC:
- /* In this case the charclass data is available inline so
- we can fail fast without a lot of extra overhead.
- */
- if (scan->flags == EXACT || !do_utf8) {
- if(!ANYOF_BITMAP_TEST(scan, *locinput)) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case TRIE:
- {
- /* what type of TRIE am I? (utf8 makes this contextual) */
- DECL_TRIE_TYPE(scan);
-
- /* what trie are we using right now */
- reg_trie_data * const trie
- = (reg_trie_data*)rexi->data->data[ ARG( scan ) ];
- HV * widecharmap = MUTABLE_HV(rexi->data->data[ ARG( scan ) + 1 ]);
- U32 state = trie->startstate;
-
- if (trie->bitmap && trie_type != trie_utf8_fold &&
- !TRIE_BITMAP_TEST(trie,*locinput)
- ) {
- if (trie->states[ state ].wordnum) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %smatched empty string...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- break;
- } else {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- }
- }
-
- {
- U8 *uc = ( U8* )locinput;
-
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- STRLEN bufflen=0;
- SV *sv_accept_buff = NULL;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- ST.accepted = 0; /* how many accepting states we have seen */
- ST.B = next;
- ST.jump = trie->jump;
- ST.me = scan;
- /*
- traverse the TRIE keeping track of all accepting states
- we transition through until we get to a failing node.
- */
-
- while ( state && uc <= (U8*)PL_regeol ) {
- U32 base = trie->states[ state ].trans.base;
- UV uvc = 0;
- U16 charid;
- /* We use charid to hold the wordnum as we don't use it
- for charid until after we have done the wordnum logic.
- We define an alias just so that the wordnum logic reads
- more naturally. */
-
-#define got_wordnum charid
- got_wordnum = trie->states[ state ].wordnum;
-
- if ( got_wordnum ) {
- if ( ! ST.accepted ) {
- ENTER;
- SAVETMPS; /* XXX is this necessary? dmq */
- bufflen = TRIE_INITAL_ACCEPT_BUFFLEN;
- sv_accept_buff=newSV(bufflen *
- sizeof(reg_trie_accepted) - 1);
- SvCUR_set(sv_accept_buff, 0);
- SvPOK_on(sv_accept_buff);
- sv_2mortal(sv_accept_buff);
- SAVETMPS;
- ST.accept_buff =
- (reg_trie_accepted*)SvPV_nolen(sv_accept_buff );
- }
- do {
- if (ST.accepted >= bufflen) {
- bufflen *= 2;
- ST.accept_buff =(reg_trie_accepted*)
- SvGROW(sv_accept_buff,
- bufflen * sizeof(reg_trie_accepted));
- }
- SvCUR_set(sv_accept_buff,SvCUR(sv_accept_buff)
- + sizeof(reg_trie_accepted));
-
-
- ST.accept_buff[ST.accepted].wordnum = got_wordnum;
- ST.accept_buff[ST.accepted].endpos = uc;
- ++ST.accepted;
- } while (trie->nextword && (got_wordnum= trie->nextword[got_wordnum]));
- }
-#undef got_wordnum
-
- DEBUG_TRIE_EXECUTE_r({
- DUMP_EXEC_POS( (char *)uc, scan, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%*s %sState: %4"UVxf" Accepted: %4"UVxf" ",
- 2+depth * 2, "", PL_colors[4],
- (UV)state, (UV)ST.accepted );
- });
-
- if ( base ) {
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
-
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state)
- {
- state = trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next;
- }
- else {
- state = 0;
- }
- uc += len;
-
- }
- else {
- state = 0;
- }
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "Charid:%3x CP:%4"UVxf" After State: %4"UVxf"%s\n",
- charid, uvc, (UV)state, PL_colors[5] );
- );
- }
- if (!ST.accepted )
- sayNO;
-
- DEBUG_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" possible matches%s\n",
- REPORT_CODE_OFF + depth * 2, "",
- PL_colors[4], (IV)ST.accepted, PL_colors[5] );
- );
- }}
- goto trie_first_try; /* jump into the fail handler */
- /* NOTREACHED */
- case TRIE_next_fail: /* we failed - try next alterative */
- if ( ST.jump) {
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- }
- trie_first_try:
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
-
- if ( ST.jump) {
- ST.lastparen = *PL_reglastparen;
- REGCP_SET(ST.cp);
- }
- if ( ST.accepted == 1 ) {
- /* only one choice left - just continue */
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ 0 ].wordnum-1, 0 );
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %sonly one match left: #%d <%s>%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[ 0 ].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- )
- : "not compiled under -Dr",
- PL_colors[5] );
- });
- PL_reginput = (char *)ST.accept_buff[ 0 ].endpos;
- /* in this case we free tmps/leave before we call regmatch
- as we wont be using accept_buff again. */
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- if ( !ST.jump || !ST.jump[ST.accept_buff[0].wordnum])
- scan = ST.B;
- else
- scan = ST.me + ST.jump[ST.accept_buff[0].wordnum];
- if (!has_cutgroup) {
- FREETMPS;
- LEAVE;
- } else {
- ST.accepted--;
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- }
-
- continue; /* execute rest of RE */
- }
-
- if ( !ST.accepted-- ) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sTRIE failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- FREETMPS;
- LEAVE;
- sayNO_SILENT;
- /*NOTREACHED*/
- }
-
- /*
- There are at least two accepting states left. Presumably
- the number of accepting states is going to be low,
- typically two. So we simply scan through to find the one
- with lowest wordnum. Once we find it, we swap the last
- state into its place and decrement the size. We then try to
- match the rest of the pattern at the point where the word
- ends. If we succeed, control just continues along the
- regex; if we fail we return here to try the next accepting
- state
- */
-
- {
- U32 best = 0;
- U32 cur;
- for( cur = 1 ; cur <= ST.accepted ; cur++ ) {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" (%d) as best, looking at %"IVdf" (%d)%s\n",
- REPORT_CODE_OFF + depth * 2, "", PL_colors[4],
- (IV)best, ST.accept_buff[ best ].wordnum, (IV)cur,
- ST.accept_buff[ cur ].wordnum, PL_colors[5] );
- );
-
- if (ST.accept_buff[cur].wordnum <
- ST.accept_buff[best].wordnum)
- best = cur;
- }
-
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ best ].wordnum - 1, 0 );
- regnode *nextop=(!ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) ?
- ST.B :
- ST.me + ST.jump[ST.accept_buff[best].wordnum];
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %strying alternation #%d <%s> at node #%d %s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[best].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- ) : "not compiled under -Dr",
- REG_NODE_NUM(nextop),
- PL_colors[5] );
- });
-
- if ( best<ST.accepted ) {
- reg_trie_accepted tmp = ST.accept_buff[ best ];
- ST.accept_buff[ best ] = ST.accept_buff[ ST.accepted ];
- ST.accept_buff[ ST.accepted ] = tmp;
- best = ST.accepted;
- }
- PL_reginput = (char *)ST.accept_buff[ best ].endpos;
- if ( !ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) {
- scan = ST.B;
- } else {
- scan = ST.me + ST.jump[ST.accept_buff[best].wordnum];
- }
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- /* NOTREACHED */
- }
- /* NOTREACHED */
- case TRIE_next:
- /* we dont want to throw this away, see bug 57042*/
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- FREETMPS;
- LEAVE;
- sayYES;
-#undef ST
-
- case EXACT: {
- char *s = STRING(scan);
- ln = STR_LEN(scan);
- if (do_utf8 != UTF) {
- /* The target and the pattern have differing utf8ness. */
- char *l = locinput;
- const char * const e = s + ln;
-
- if (do_utf8) {
- /* The target is utf8, the pattern is not utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*(U8*)s) !=
- utf8n_to_uvuni((U8*)l, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- l += ulen;
- s ++;
- }
- }
- else {
- /* The target is not utf8, the pattern is utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*((U8*)l)) !=
- utf8n_to_uvuni((U8*)s, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- s += ulen;
- l ++;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
- /* The target and the pattern have the same utf8ness. */
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr)
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && memNE(s, locinput, ln))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case EXACTFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case EXACTF: {
- char * const s = STRING(scan);
- ln = STR_LEN(scan);
-
- if (do_utf8 || UTF) {
- /* Either target or the pattern are utf8. */
- const char * const l = locinput;
- char *e = PL_regeol;
-
- if (ibcmp_utf8(s, 0, ln, (bool)UTF,
- l, &e, 0, do_utf8)) {
- /* One more case for the sharp s:
- * pack("U0U*", 0xDF) =~ /ss/i,
- * the 0xC3 0x9F are the UTF-8
- * byte sequence for the U+00DF. */
-
- if (!(do_utf8 &&
- toLOWER(s[0]) == 's' &&
- ln >= 2 &&
- toLOWER(s[1]) == 's' &&
- (U8)l[0] == 0xC3 &&
- e - l >= 2 &&
- (U8)l[1] == 0x9F))
- sayNO;
- }
- locinput = e;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Neither the target and the pattern are utf8. */
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- UCHARAT(s) != ((OP(scan) == EXACTF)
- ? PL_fold : PL_fold_locale)[nextchr])
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && (OP(scan) == EXACTF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln)))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case BOUNDL:
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- case NBOUND:
- /* was last char in word? */
- if (do_utf8) {
- if (locinput == PL_bostr)
- ln = '\n';
- else {
- const U8 * const r = reghop3((U8*)locinput, -1, (U8*)PL_bostr);
-
- ln = utf8n_to_uvchr(r, UTF8SKIP(r), 0, uniflags);
- }
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM_uni(ln);
- LOAD_UTF8_CHARCLASS_ALNUM();
- n = swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8);
- }
- else {
- ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln));
- n = isALNUM_LC_utf8((U8*)locinput);
- }
- }
- else {
- ln = (locinput != PL_bostr) ?
- UCHARAT(locinput - 1) : '\n';
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM(ln);
- n = isALNUM(nextchr);
- }
- else {
- ln = isALNUM_LC(ln);
- n = isALNUM_LC(nextchr);
- }
- }
- if (((!ln) == (!n)) == (OP(scan) == BOUND ||
- OP(scan) == BOUNDL))
- sayNO;
- break;
- case ANYOF:
- if (do_utf8) {
- STRLEN inclasslen = PL_regeol - locinput;
-
- if (!reginclass(rex, scan, (U8*)locinput, &inclasslen, do_utf8))
- goto anyof_fail;
- if (locinput >= PL_regeol)
- sayNO;
- locinput += inclasslen ? inclasslen : UTF8SKIP(locinput);
- nextchr = UCHARAT(locinput);
- break;
- }
- else {
- if (nextchr < 0)
- nextchr = UCHARAT(locinput);
- if (!REGINCLASS(rex, scan, (U8*)locinput))
- goto anyof_fail;
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- }
- anyof_fail:
- /* If we might have the case of the German sharp s
- * in a casefolding Unicode character class. */
-
- if (ANYOF_FOLD_SHARP_S(scan, locinput, PL_regeol)) {
- locinput += SHARP_S_SKIP;
- nextchr = UCHARAT(locinput);
- }
- else
- sayNO;
- break;
- /* Special char classes - The defines start on line 129 or so */
- CCC_TRY_AFF( ALNUM, ALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
- CCC_TRY_NEG(NALNUM, NALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
-
- CCC_TRY_AFF( SPACE, SPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
- CCC_TRY_NEG(NSPACE, NSPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
-
- CCC_TRY_AFF( DIGIT, DIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
- CCC_TRY_NEG(NDIGIT, NDIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
-
- case CLUMP: /* Match \X: logical Unicode character. This is defined as
- a Unicode extended Grapheme Cluster */
- /* From http://www.unicode.org/reports/tr29 (5.2 version). An
- extended Grapheme Cluster is:
-
- CR LF
- | Prepend* Begin Extend*
- | .
-
- Begin is (Hangul-syllable | ! Control)
- Extend is (Grapheme_Extend | Spacing_Mark)
- Control is [ GCB_Control CR LF ]
-
- The discussion below shows how the code for CLUMP is derived
- from this regex. Note that most of these concepts are from
- property values of the Grapheme Cluster Boundary (GCB) property.
- No code point can have multiple property values for a given
- property. Thus a code point in Prepend can't be in Control, but
- it must be in !Control. This is why Control above includes
- GCB_Control plus CR plus LF. The latter two are used in the GCB
- property separately, and so can't be in GCB_Control, even though
- they logically are controls. Control is not the same as gc=cc,
- but includes format and other characters as well.
-
- The Unicode definition of Hangul-syllable is:
- L+
- | (L* ( ( V | LV ) V* | LVT ) T*)
- | T+
- )
- Each of these is a value for the GCB property, and hence must be
- disjoint, so the order they are tested is immaterial, so the
- above can safely be changed to
- T+
- | L+
- | (L* ( LVT | ( V | LV ) V*) T*)
-
- The last two terms can be combined like this:
- L* ( L
- | (( LVT | ( V | LV ) V*) T*))
-
- And refactored into this:
- L* (L | LVT T* | V V* T* | LV V* T*)
-
- That means that if we have seen any L's at all we can quit
- there, but if the next character is a LVT, a V or and LV we
- should keep going.
-
- There is a subtlety with Prepend* which showed up in testing.
- Note that the Begin, and only the Begin is required in:
- | Prepend* Begin Extend*
- Also, Begin contains '! Control'. A Prepend must be a '!
- Control', which means it must be a Begin. What it comes down to
- is that if we match Prepend* and then find no suitable Begin
- afterwards, that if we backtrack the last Prepend, that one will
- be a suitable Begin.
- */
-
- if (locinput >= PL_regeol)
- sayNO;
- if (! do_utf8) {
-
- /* Match either CR LF or '.', as all the other possibilities
- * require utf8 */
- locinput++; /* Match the . or CR */
- if (nextchr == '\r'
- && locinput < PL_regeol
- && UCHARAT(locinput) == '\n') locinput++;
- }
- else {
-
- /* Utf8: See if is ( CR LF ); already know that locinput <
- * PL_regeol, so locinput+1 is in bounds */
- if (nextchr == '\r' && UCHARAT(locinput + 1) == '\n') {
- locinput += 2;
- }
- else {
- /* In case have to backtrack to beginning, then match '.' */
- char *starting = locinput;
-
- /* In case have to backtrack the last prepend */
- char *previous_prepend = 0;
-
- LOAD_UTF8_CHARCLASS_GCB();
-
- /* Match (prepend)* */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_prepend,
- (U8*)locinput, do_utf8))
- {
- previous_prepend = locinput;
- locinput += UTF8SKIP(locinput);
- }
-
- /* As noted above, if we matched a prepend character, but
- * the next thing won't match, back off the last prepend we
- * matched, as it is guaranteed to match the begin */
- if (previous_prepend
- && (locinput >= PL_regeol
- || ! swash_fetch(PL_utf8_X_begin,
- (U8*)locinput, do_utf8)))
- {
- locinput = previous_prepend;
- }
-
- /* Note that here we know PL_regeol > locinput, as we
- * tested that upon input to this switch case, and if we
- * moved locinput forward, we tested the result just above
- * and it either passed, or we backed off so that it will
- * now pass */
- if (! swash_fetch(PL_utf8_X_begin, (U8*)locinput, do_utf8)) {
-
- /* Here did not match the required 'Begin' in the
- * second term. So just match the very first
- * character, the '.' of the final term of the regex */
- locinput = starting + UTF8SKIP(starting);
- } else {
-
- /* Here is the beginning of a character that can have
- * an extender. It is either a hangul syllable, or a
- * non-control */
- if (swash_fetch(PL_utf8_X_non_hangul,
- (U8*)locinput, do_utf8))
- {
-
- /* Here not a Hangul syllable, must be a
- * ('! * Control') */
- locinput += UTF8SKIP(locinput);
- } else {
-
- /* Here is a Hangul syllable. It can be composed
- * of several individual characters. One
- * possibility is T+ */
- if (swash_fetch(PL_utf8_X_T,
- (U8*)locinput, do_utf8))
- {
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_T,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- } else {
-
- /* Here, not T+, but is a Hangul. That means
- * it is one of the others: L, LV, LVT or V,
- * and matches:
- * L* (L | LVT T* | V V* T* | LV V* T*) */
-
- /* Match L* */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_L,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
-
- /* Here, have exhausted L*. If the next
- * character is not an LV, LVT nor V, it means
- * we had to have at least one L, so matches L+
- * in the original equation, we have a complete
- * hangul syllable. Are done. */
-
- if (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_LV_LVT_V,
- (U8*)locinput, do_utf8))
- {
-
- /* Otherwise keep going. Must be LV, LVT
- * or V. See if LVT */
- if (swash_fetch(PL_utf8_X_LVT,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- } else {
-
- /* Must be V or LV. Take it, then
- * match V* */
- locinput += UTF8SKIP(locinput);
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_V,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- }
-
- /* And any of LV, LVT, or V can be followed
- * by T* */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_T,
- (U8*)locinput,
- do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- }
- }
- }
-
- /* Match any extender */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_extend,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- }
- }
- if (locinput > PL_regeol) sayNO;
- }
- nextchr = UCHARAT(locinput);
- break;
-
- case NREFFL:
- {
- char *s;
- char type;
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NREF:
- case NREFF:
- type = OP(scan);
- n = reg_check_named_buff_matched(rex,scan);
-
- if ( n ) {
- type = REF + ( type - NREF );
- goto do_ref;
- } else {
- sayNO;
- }
- /* unreached */
- case REFFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case REF:
- case REFF:
- n = ARG(scan); /* which paren pair */
- type = OP(scan);
- do_ref:
- ln = PL_regoffs[n].start;
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (*PL_reglastparen < n || ln == -1)
- sayNO; /* Do not match unless seen CLOSEn. */
- if (ln == PL_regoffs[n].end)
- break;
-
- s = PL_bostr + ln;
- if (do_utf8 && type != REF) { /* REF can do byte comparison */
- char *l = locinput;
- const char *e = PL_bostr + PL_regoffs[n].end;
- /*
- * Note that we can't do the "other character" lookup trick as
- * in the 8-bit case (no pun intended) because in Unicode we
- * have to map both upper and title case to lower case.
- */
- if (type == REFF) {
- while (s < e) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- if (l >= PL_regeol)
- sayNO;
- toLOWER_utf8((U8*)s, tmpbuf1, &ulen1);
- toLOWER_utf8((U8*)l, tmpbuf2, &ulen2);
- if (ulen1 != ulen2 || memNE((char *)tmpbuf1, (char *)tmpbuf2, ulen1))
- sayNO;
- s += ulen1;
- l += ulen2;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- (type == REF ||
- (UCHARAT(s) != (type == REFF
- ? PL_fold : PL_fold_locale)[nextchr])))
- sayNO;
- ln = PL_regoffs[n].end - ln;
- if (locinput + ln > PL_regeol)
- sayNO;
- if (ln > 1 && (type == REF
- ? memNE(s, locinput, ln)
- : (type == REFF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln))))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case NOTHING:
- case TAIL:
- break;
- case BACK:
- break;
-
-#undef ST
-#define ST st->u.eval
- {
- SV *ret;
- REGEXP *re_sv;
- regexp *re;
- regexp_internal *rei;
- regnode *startpoint;
-
- case GOSTART:
- case GOSUB: /* /(...(?1))/ /(...(?&foo))/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if (cur_eval->u.eval.close_paren == (U32)ARG(scan))
- Perl_croak(aTHX_ "Infinite recursion in regex");
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_
- "Pattern subroutine nesting without pos change"
- " exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- re_sv = rex_sv;
- re = rex;
- rei = rexi;
- (void)ReREFCNT_inc(rex_sv);
- if (OP(scan)==GOSUB) {
- startpoint = scan + ARG2L(scan);
- ST.close_paren = ARG(scan);
- } else {
- startpoint = rei->program+1;
- ST.close_paren = 0;
- }
- goto eval_recurse_doit;
- /* NOTREACHED */
- case EVAL: /* /(?{A})B/ /(??{A})B/ and /(?(?{A})X|Y)B/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_ "EVAL without pos change exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- {
- /* execute the code in the {...} */
- dSP;
- SV ** const before = SP;
- OP_4tree * const oop = PL_op;
- COP * const ocurcop = PL_curcop;
- PAD *old_comppad;
- char *saved_regeol = PL_regeol;
-
- n = ARG(scan);
- PL_op = (OP_4tree*)rexi->data->data[n];
- DEBUG_STATE_r( PerlIO_printf(Perl_debug_log,
- " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) );
- PAD_SAVE_LOCAL(old_comppad, (PAD*)rexi->data->data[n + 2]);
- PL_regoffs[0].end = PL_reg_magic->mg_len = locinput - PL_bostr;
-
- if (sv_yes_mark) {
- SV *sv_mrk = get_sv("REGMARK", 1);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- CALLRUNOPS(aTHX); /* Scalar context. */
- SPAGAIN;
- if (SP == before)
- ret = &PL_sv_undef; /* protect against empty (?{}) blocks. */
- else {
- ret = POPs;
- PUTBACK;
- }
-
- PL_op = oop;
- PAD_RESTORE_LOCAL(old_comppad);
- PL_curcop = ocurcop;
- PL_regeol = saved_regeol;
- if (!logical) {
- /* /(?{...})/ */
- sv_setsv(save_scalar(PL_replgv), ret);
- break;
- }
- }
- if (logical == 2) { /* Postponed subexpression: /(??{...})/ */
- logical = 0;
- {
- /* extract RE object from returned value; compiling if
- * necessary */
- MAGIC *mg = NULL;
- REGEXP *rx = NULL;
-
- if (SvROK(ret)) {
- SV *const sv = SvRV(ret);
-
- if (SvTYPE(sv) == SVt_REGEXP) {
- rx = (REGEXP*) sv;
- } else if (SvSMAGICAL(sv)) {
- mg = mg_find(sv, PERL_MAGIC_qr);
- assert(mg);
- }
- } else if (SvTYPE(ret) == SVt_REGEXP) {
- rx = (REGEXP*) ret;
- } else if (SvSMAGICAL(ret)) {
- if (SvGMAGICAL(ret)) {
- /* I don't believe that there is ever qr magic
- here. */
- assert(!mg_find(ret, PERL_MAGIC_qr));
- sv_unmagic(ret, PERL_MAGIC_qr);
- }
- else {
- mg = mg_find(ret, PERL_MAGIC_qr);
- /* testing suggests mg only ends up non-NULL for
- scalars who were upgraded and compiled in the
- else block below. In turn, this is only
- triggered in the "postponed utf8 string" tests
- in t/op/pat.t */
- }
- }
-
- if (mg) {
- rx = (REGEXP *) mg->mg_obj; /*XXX:dmq*/
- assert(rx);
- }
- if (rx) {
- rx = reg_temp_copy(NULL, rx);
- }
- else {
- U32 pm_flags = 0;
- const I32 osize = PL_regsize;
-
- if (DO_UTF8(ret)) {
- assert (SvUTF8(ret));
- } else if (SvUTF8(ret)) {
- /* Not doing UTF-8, despite what the SV says. Is
- this only if we're trapped in use 'bytes'? */
- /* Make a copy of the octet sequence, but without
- the flag on, as the compiler now honours the
- SvUTF8 flag on ret. */
- STRLEN len;
- const char *const p = SvPV(ret, len);
- ret = newSVpvn_flags(p, len, SVs_TEMP);
- }
- rx = CALLREGCOMP(ret, pm_flags);
- if (!(SvFLAGS(ret)
- & (SVs_TEMP | SVs_PADTMP | SVf_READONLY
- | SVs_GMG))) {
- /* This isn't a first class regexp. Instead, it's
- caching a regexp onto an existing, Perl visible
- scalar. */
- sv_magic(ret, MUTABLE_SV(rx), PERL_MAGIC_qr, 0, 0);
- }
- PL_regsize = osize;
- }
- re_sv = rx;
- re = (struct regexp *)SvANY(rx);
- }
- RXp_MATCH_COPIED_off(re);
- re->subbeg = rex->subbeg;
- re->sublen = rex->sublen;
- rei = RXi_GET(re);
- DEBUG_EXECUTE_r(
- debug_start_match(re_sv, do_utf8, locinput, PL_regeol,
- "Matching embedded");
- );
- startpoint = rei->program + 1;
- ST.close_paren = 0; /* only used for GOSUB */
- /* borrowed from regtry */
- if (PL_reg_start_tmpl <= re->nparens) {
- PL_reg_start_tmpl = re->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- eval_recurse_doit: /* Share code with GOSUB below this line */
- /* run the pattern returned from (??{...}) */
- ST.cp = regcppush(0); /* Save *all* the positions. */
- REGCP_SET(ST.lastcp);
-
- PL_regoffs = re->offs; /* essentially NOOP on GOSUB */
-
- /* see regtry, specifically PL_reglast(?:close)?paren is a pointer! (i dont know why) :dmq */
- PL_reglastparen = &re->lastparen;
- PL_reglastcloseparen = &re->lastcloseparen;
- re->lastparen = 0;
- re->lastcloseparen = 0;
-
- PL_reginput = locinput;
- PL_regsize = 0;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
-
- ST.toggle_reg_flags = PL_reg_flags;
- if (RX_UTF8(re_sv))
- PL_reg_flags |= RF_utf8;
- else
- PL_reg_flags &= ~RF_utf8;
- ST.toggle_reg_flags ^= PL_reg_flags; /* diff of old and new */
-
- ST.prev_rex = rex_sv;
- ST.prev_curlyx = cur_curlyx;
- SETREX(rex_sv,re_sv);
- rex = re;
- rexi = rei;
- cur_curlyx = NULL;
- ST.B = next;
- ST.prev_eval = cur_eval;
- cur_eval = st;
- /* now continue from first node in postoned RE */
- PUSH_YES_STATE_GOTO(EVAL_AB, startpoint);
- /* NOTREACHED */
- }
- /* logical is 1, /(?(?{...})X|Y)/ */
- sw = (bool)SvTRUE(ret);
- logical = 0;
- break;
- }
-
- case EVAL_AB: /* cleanup after a successful (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- regcpblow(ST.cp);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
- /* also update PL_regoffs */
- PL_regoffs = rex->offs;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayYES;
-
-
- case EVAL_AB_fail: /* unsuccessfully ran A or B in (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- PL_reginput = locinput;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayNO_SILENT;
-#undef ST
-
- case OPEN:
- n = ARG(scan); /* which paren pair */
- PL_reg_start_tmp[n] = locinput;
- if (n > PL_regsize)
- PL_regsize = n;
- lastopen = n;
- break;
- case CLOSE:
- n = ARG(scan); /* which paren pair */
- PL_regoffs[n].start = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if (cur_eval && cur_eval->u.eval.close_paren == n) {
- goto fake_end;
- }
- break;
- case ACCEPT:
- if (ARG(scan)){
- regnode *cursor;
- for (cursor=scan;
- cursor && OP(cursor)!=END;
- cursor=regnext(cursor))
- {
- if ( OP(cursor)==CLOSE ){
- n = ARG(cursor);
- if ( n <= lastopen ) {
- PL_regoffs[n].start
- = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if ( n == ARG(scan) || (cur_eval &&
- cur_eval->u.eval.close_paren == n))
- break;
- }
- }
- }
- }
- goto fake_end;
- /*NOTREACHED*/
- case GROUPP:
- n = ARG(scan); /* which paren pair */
- sw = (bool)(*PL_reglastparen >= n && PL_regoffs[n].end != -1);
- break;
- case NGROUPP:
- /* reg_check_named_buff_matched returns 0 for no match */
- sw = (bool)(0 < reg_check_named_buff_matched(rex,scan));
- break;
- case INSUBP:
- n = ARG(scan);
- sw = (cur_eval && (!n || cur_eval->u.eval.close_paren == n));
- break;
- case DEFINEP:
- sw = 0;
- break;
- case IFTHEN:
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (sw)
- next = NEXTOPER(NEXTOPER(scan));
- else {
- next = scan + ARG(scan);
- if (OP(next) == IFTHEN) /* Fake one. */
- next = NEXTOPER(NEXTOPER(next));
- }
- break;
- case LOGICAL:
- logical = scan->flags;
- break;
-
-/*******************************************************************
-
-The CURLYX/WHILEM pair of ops handle the most generic case of the /A*B/
-pattern, where A and B are subpatterns. (For simple A, CURLYM or
-STAR/PLUS/CURLY/CURLYN are used instead.)
-
-A*B is compiled as <CURLYX><A><WHILEM><B>
-
-On entry to the subpattern, CURLYX is called. This pushes a CURLYX
-state, which contains the current count, initialised to -1. It also sets
-cur_curlyx to point to this state, with any previous value saved in the
-state block.
-
-CURLYX then jumps straight to the WHILEM op, rather than executing A,
-since the pattern may possibly match zero times (i.e. it's a while {} loop
-rather than a do {} while loop).
-
-Each entry to WHILEM represents a successful match of A. The count in the
-CURLYX block is incremented, another WHILEM state is pushed, and execution
-passes to A or B depending on greediness and the current count.
-
-For example, if matching against the string a1a2a3b (where the aN are
-substrings that match /A/), then the match progresses as follows: (the
-pushed states are interspersed with the bits of strings matched so far):
-
- <CURLYX cnt=-1>
- <CURLYX cnt=0><WHILEM>
- <CURLYX cnt=1><WHILEM> a1 <WHILEM>
- <CURLYX cnt=2><WHILEM> a1 <WHILEM> a2 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> b
-
-(Contrast this with something like CURLYM, which maintains only a single
-backtrack state:
-
- <CURLYM cnt=0> a1
- a1 <CURLYM cnt=1> a2
- a1 a2 <CURLYM cnt=2> a3
- a1 a2 a3 <CURLYM cnt=3> b
-)
-
-Each WHILEM state block marks a point to backtrack to upon partial failure
-of A or B, and also contains some minor state data related to that
-iteration. The CURLYX block, pointed to by cur_curlyx, contains the
-overall state, such as the count, and pointers to the A and B ops.
-
-This is complicated slightly by nested CURLYX/WHILEM's. Since cur_curlyx
-must always point to the *current* CURLYX block, the rules are:
-
-When executing CURLYX, save the old cur_curlyx in the CURLYX state block,
-and set cur_curlyx to point the new block.
-
-When popping the CURLYX block after a successful or unsuccessful match,
-restore the previous cur_curlyx.
-
-When WHILEM is about to execute B, save the current cur_curlyx, and set it
-to the outer one saved in the CURLYX block.
-
-When popping the WHILEM block after a successful or unsuccessful B match,
-restore the previous cur_curlyx.
-
-Here's an example for the pattern (AI* BI)*BO
-I and O refer to inner and outer, C and W refer to CURLYX and WHILEM:
-
-cur_
-curlyx backtrack stack
------- ---------------
-NULL
-CO <CO prev=NULL> <WO>
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-NULL <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi <WO prev=CO> bo
-
-At this point the pattern succeeds, and we work back down the stack to
-clean up, restoring as we go:
-
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO>
-NULL
-
-*******************************************************************/
-
-#define ST st->u.curlyx
-
- case CURLYX: /* start of /A*B/ (for complex A) */
- {
- /* No need to save/restore up to this paren */
- I32 parenfloor = scan->flags;
-
- assert(next); /* keep Coverity happy */
- if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */
- next += ARG(next);
-
- /* XXXX Probably it is better to teach regpush to support
- parenfloor > PL_regsize... */
- if (parenfloor > (I32)*PL_reglastparen)
- parenfloor = *PL_reglastparen; /* Pessimization... */
-
- ST.prev_curlyx= cur_curlyx;
- cur_curlyx = st;
- ST.cp = PL_savestack_ix;
-
- /* these fields contain the state of the current curly.
- * they are accessed by subsequent WHILEMs */
- ST.parenfloor = parenfloor;
- ST.min = ARG1(scan);
- ST.max = ARG2(scan);
- ST.A = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- ST.B = next;
- ST.minmod = minmod;
- minmod = 0;
- ST.count = -1; /* this will be updated by WHILEM */
- ST.lastloc = NULL; /* this will be updated by WHILEM */
-
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYX_end, PREVOPER(next));
- /* NOTREACHED */
- }
-
- case CURLYX_end: /* just finished matching all of A*B */
- cur_curlyx = ST.prev_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case CURLYX_end_fail: /* just failed to match all of A*B */
- regcpblow(ST.cp);
- cur_curlyx = ST.prev_curlyx;
- sayNO;
- /* NOTREACHED */
-
-
-#undef ST
-#define ST st->u.whilem
-
- case WHILEM: /* just matched an A in /A*B/ (for complex A) */
- {
- /* see the discussion above about CURLYX/WHILEM */
- I32 n;
- assert(cur_curlyx); /* keep Coverity happy */
- n = ++cur_curlyx->u.curlyx.count; /* how many A's matched */
- ST.save_lastloc = cur_curlyx->u.curlyx.lastloc;
- ST.cache_offset = 0;
- ST.cache_mask = 0;
-
- PL_reginput = locinput;
-
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: matched %ld out of %ld..%ld\n",
- REPORT_CODE_OFF+depth*2, "", (long)n,
- (long)cur_curlyx->u.curlyx.min,
- (long)cur_curlyx->u.curlyx.max)
- );
-
- /* First just match a string of min A's. */
-
- if (n < cur_curlyx->u.curlyx.min) {
- cur_curlyx->u.curlyx.lastloc = locinput;
- PUSH_STATE_GOTO(WHILEM_A_pre, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
-
- /* If degenerate A matches "", assume A done. */
-
- if (locinput == cur_curlyx->u.curlyx.lastloc) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: empty match detected, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- goto do_whilem_B_max;
- }
-
- /* super-linear cache processing */
-
- if (scan->flags) {
-
- if (!PL_reg_maxiter) {
- /* start the countdown: Postpone detection until we
- * know the match is not *that* much linear. */
- PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4);
- /* possible overflow for long strings and many CURLYX's */
- if (PL_reg_maxiter < 0)
- PL_reg_maxiter = I32_MAX;
- PL_reg_leftiter = PL_reg_maxiter;
- }
-
- if (PL_reg_leftiter-- == 0) {
- /* initialise cache */
- const I32 size = (PL_reg_maxiter + 7)/8;
- if (PL_reg_poscache) {
- if ((I32)PL_reg_poscache_size < size) {
- Renew(PL_reg_poscache, size, char);
- PL_reg_poscache_size = size;
- }
- Zero(PL_reg_poscache, size, char);
- }
- else {
- PL_reg_poscache_size = size;
- Newxz(PL_reg_poscache, size, char);
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%swhilem: Detected a super-linear match, switching on caching%s...\n",
- PL_colors[4], PL_colors[5])
- );
- }
-
- if (PL_reg_leftiter < 0) {
- /* have we already failed at this position? */
- I32 offset, mask;
- offset = (scan->flags & 0xf) - 1
- + (locinput - PL_bostr) * (scan->flags>>4);
- mask = 1 << (offset % 8);
- offset /= 8;
- if (PL_reg_poscache[offset] & mask) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: (cache) already tried at this position...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- sayNO; /* cache records failure */
- }
- ST.cache_offset = offset;
- ST.cache_mask = mask;
- }
- }
-
- /* Prefer B over A for minimal matching. */
-
- if (cur_curlyx->u.curlyx.minmod) {
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- ST.cp = regcppush(ST.save_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_YES_STATE_GOTO(WHILEM_B_min, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
- }
-
- /* Prefer A over B for maximal matching. */
-
- if (n < cur_curlyx->u.curlyx.max) { /* More greed allowed? */
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- cur_curlyx->u.curlyx.lastloc = locinput;
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_max, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
- goto do_whilem_B_max;
- }
- /* NOTREACHED */
-
- case WHILEM_B_min: /* just matched B in a minimal match */
- case WHILEM_B_max: /* just matched B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case WHILEM_B_max_fail: /* just failed to match B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_min_fail: /* just failed to match A in a minimal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- /* FALL THROUGH */
- case WHILEM_A_pre_fail: /* just failed to match even minimal A */
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_max_fail: /* just failed to match A in a maximal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex); /* Restore some previous $<digit>s? */
- PL_reginput = locinput;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s whilem: failed, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- do_whilem_B_max:
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
-
- /* now try B */
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- PUSH_YES_STATE_GOTO(WHILEM_B_max, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
-
- case WHILEM_B_min_fail: /* just failed to match B in a minimal match */
- cur_curlyx = ST.save_curlyx;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
-
- if (cur_curlyx->u.curlyx.count >= cur_curlyx->u.curlyx.max) {
- /* Maximum greed exceeded */
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP),
- "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s trying longer...\n", REPORT_CODE_OFF+depth*2, "")
- );
- /* Try grabbing another A and see if it helps. */
- PL_reginput = locinput;
- cur_curlyx->u.curlyx.lastloc = locinput;
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_min, ST.save_curlyx->u.curlyx.A);
- /* NOTREACHED */
-
-#undef ST
-#define ST st->u.branch
-
- case BRANCHJ: /* /(...|A|...)/ with long next pointer */
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- scan = NEXTOPER(scan);
- /* FALL THROUGH */
-
- case BRANCH: /* /(...|A|...)/ */
- scan = NEXTOPER(scan); /* scan now points to inner node */
- ST.lastparen = *PL_reglastparen;
- ST.next_branch = next;
- REGCP_SET(ST.cp);
- PL_reginput = locinput;
-
- /* Now go into the branch */
- if (has_cutgroup) {
- PUSH_YES_STATE_GOTO(BRANCH_next, scan);
- } else {
- PUSH_STATE_GOTO(BRANCH_next, scan);
- }
- /* NOTREACHED */
- case CUTGROUP:
- PL_reginput = locinput;
- sv_yes_mark = st->u.mark.mark_name = scan->flags ? NULL :
- MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(CUTGROUP_next,next);
- /* NOTREACHED */
- case CUTGROUP_next_fail:
- do_cutgroup = 1;
- no_final = 1;
- if (st->u.mark.mark_name)
- sv_commit = st->u.mark.mark_name;
- sayNO;
- /* NOTREACHED */
- case BRANCH_next:
- sayYES;
- /* NOTREACHED */
- case BRANCH_next_fail: /* that branch failed; try the next, if any */
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- /*dmq: *PL_reglastcloseparen = n; */
- scan = ST.next_branch;
- /* no more branches? */
- if (!scan || (OP(scan) != BRANCH && OP(scan) != BRANCHJ)) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sBRANCH failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- sayNO_SILENT;
- }
- continue; /* execute next BRANCH[J] op */
- /* NOTREACHED */
-
- case MINMOD:
- minmod = 1;
- break;
-
-#undef ST
-#define ST st->u.curlym
-
- case CURLYM: /* /A{m,n}B/ where A is fixed-length */
-
- /* This is an optimisation of CURLYX that enables us to push
- * only a single backtracking state, no matter how many matches
- * there are in {m,n}. It relies on the pattern being constant
- * length, with no parens to influence future backrefs
- */
-
- ST.me = scan;
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
-
- /* if paren positive, emulate an OPEN/CLOSE around A */
- if (ST.me->flags) {
- U32 paren = ST.me->flags;
- if (paren > PL_regsize)
- PL_regsize = paren;
- if (paren > *PL_reglastparen)
- *PL_reglastparen = paren;
- scan += NEXT_OFF(scan); /* Skip former OPEN. */
- }
- ST.A = scan;
- ST.B = next;
- ST.alen = 0;
- ST.count = 0;
- ST.minmod = minmod;
- minmod = 0;
- ST.c1 = CHRTEST_UNINIT;
- REGCP_SET(ST.cp);
-
- if (!(ST.minmod ? ARG1(ST.me) : ARG2(ST.me))) /* min/max */
- goto curlym_do_B;
-
- curlym_do_A: /* execute the A in /A{m,n}B/ */
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYM_A, ST.A); /* match A */
- /* NOTREACHED */
-
- case CURLYM_A: /* we've just matched an A */
- locinput = st->locinput;
- nextchr = UCHARAT(locinput);
-
- ST.count++;
- /* after first match, determine A's length: u.curlym.alen */
- if (ST.count == 1) {
- if (PL_reg_match_utf8) {
- char *s = locinput;
- while (s < PL_reginput) {
- ST.alen++;
- s += UTF8SKIP(s);
- }
- }
- else {
- ST.alen = PL_reginput - locinput;
- }
- if (ST.alen == 0)
- ST.count = ST.minmod ? ARG1(ST.me) : ARG2(ST.me);
- }
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM now matched %"IVdf" times, len=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)), "",
- (IV) ST.count, (IV)ST.alen)
- );
-
- locinput = PL_reginput;
-
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- goto fake_end;
-
- {
- I32 max = (ST.minmod ? ARG1(ST.me) : ARG2(ST.me));
- if ( max == REG_INFTY || ST.count < max )
- goto curlym_do_A; /* try to match another A */
- }
- goto curlym_do_B; /* try to match B */
-
- case CURLYM_A_fail: /* just failed to match an A */
- REGCP_UNWIND(ST.cp);
-
- if (ST.minmod || ST.count < ARG1(ST.me) /* min*/
- || (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags))
- sayNO;
-
- curlym_do_B: /* execute the B in /A{m,n}B/ */
- PL_reginput = locinput;
- if (ST.c1 == CHRTEST_UNINIT) {
- /* calculate c1 and c2 for possible match of 1st char
- * following curly */
- ST.c1 = ST.c2 = CHRTEST_VOID;
- if (HAS_TEXT(ST.B) || JUMPABLE(ST.B)) {
- regnode *text_node = ST.B;
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
- /* this used to be
-
- (HAS_TEXT(text_node) && PL_regkind[OP(text_node)] == EXACT)
-
- But the former is redundant in light of the latter.
-
- if this changes back then the macro for
- IS_TEXT and friends need to change.
- */
- if (PL_regkind[OP(text_node)] == EXACT)
- {
-
- ST.c1 = (U8)*STRING(text_node);
- ST.c2 =
- (IS_TEXTF(text_node))
- ? PL_fold[ST.c1]
- : (IS_TEXTFL(text_node))
- ? PL_fold_locale[ST.c1]
- : ST.c1;
- }
- }
- }
-
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM trying tail with matches=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)),
- "", (IV)ST.count)
- );
- if (ST.c1 != CHRTEST_VOID
- && UCHARAT(PL_reginput) != ST.c1
- && UCHARAT(PL_reginput) != ST.c2)
- {
- /* simulate B failing */
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM Fast bail c1=%"IVdf" c2=%"IVdf"\n",
- (int)(REPORT_CODE_OFF+(depth*2)),"",
- (IV)ST.c1,(IV)ST.c2
- ));
- state_num = CURLYM_B_fail;
- goto reenter_switch;
- }
-
- if (ST.me->flags) {
- /* mark current A as captured */
- I32 paren = ST.me->flags;
- if (ST.count) {
- PL_regoffs[paren].start
- = HOPc(PL_reginput, -ST.alen) - PL_bostr;
- PL_regoffs[paren].end = PL_reginput - PL_bostr;
- /*dmq: *PL_reglastcloseparen = paren; */
- }
- else
- PL_regoffs[paren].end = -1;
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- {
- if (ST.count)
- goto fake_end;
- else
- sayNO;
- }
- }
-
- PUSH_STATE_GOTO(CURLYM_B, ST.B); /* match B */
- /* NOTREACHED */
-
- case CURLYM_B_fail: /* just failed to match a B */
- REGCP_UNWIND(ST.cp);
- if (ST.minmod) {
- I32 max = ARG2(ST.me);
- if (max != REG_INFTY && ST.count == max)
- sayNO;
- goto curlym_do_A; /* try to match a further A */
- }
- /* backtrack one A */
- if (ST.count == ARG1(ST.me) /* min */)
- sayNO;
- ST.count--;
- locinput = HOPc(locinput, -ST.alen);
- goto curlym_do_B; /* try to match B */
-
-#undef ST
-#define ST st->u.curly
-
-#define CURLY_SETPAREN(paren, success) \
- if (paren) { \
- if (success) { \
- PL_regoffs[paren].start = HOPc(locinput, -1) - PL_bostr; \
- PL_regoffs[paren].end = locinput - PL_bostr; \
- *PL_reglastcloseparen = paren; \
- } \
- else \
- PL_regoffs[paren].end = -1; \
- }
-
- case STAR: /* /A*B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 0;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case PLUS: /* /A+B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 1;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case CURLYN: /* /(A){m,n}B/ where A is width 1 */
- ST.paren = scan->flags; /* Which paren to set */
- if (ST.paren > PL_regsize)
- PL_regsize = ST.paren;
- if (ST.paren > *PL_reglastparen)
- *PL_reglastparen = ST.paren;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- ST.min=1;
- ST.max=1;
- }
- scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE);
- goto repeat;
- case CURLY: /* /A{m,n}B/ where A is width 1 */
- ST.paren = 0;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
- repeat:
- /*
- * Lookahead to avoid useless match attempts
- * when we know what character comes next.
- *
- * Used to only do .*x and .*?x, but now it allows
- * for )'s, ('s and (?{ ... })'s to be in the way
- * of the quantifier and the EXACT-like node. -- japhy
- */
-
- if (ST.min > ST.max) /* XXX make this a compile-time check? */
- sayNO;
- if (HAS_TEXT(next) || JUMPABLE(next)) {
- U8 *s;
- regnode *text_node = next;
-
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
-
- if (! HAS_TEXT(text_node))
- ST.c1 = ST.c2 = CHRTEST_VOID;
- else {
- if ( PL_regkind[OP(text_node)] != EXACT ) {
- ST.c1 = ST.c2 = CHRTEST_VOID;
- goto assume_ok_easy;
- }
- else
- s = (U8*)STRING(text_node);
-
- /* Currently we only get here when
-
- PL_rekind[OP(text_node)] == EXACT
-
- if this changes back then the macro for IS_TEXT and
- friends need to change. */
- if (!UTF) {
- ST.c2 = ST.c1 = *s;
- if (IS_TEXTF(text_node))
- ST.c2 = PL_fold[ST.c1];
- else if (IS_TEXTFL(text_node))
- ST.c2 = PL_fold_locale[ST.c1];
- }
- else { /* UTF */
- if (IS_TEXTF(text_node)) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- to_utf8_lower((U8*)s, tmpbuf1, &ulen1);
- to_utf8_upper((U8*)s, tmpbuf2, &ulen2);
-#ifdef EBCDIC
- ST.c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
- ST.c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
-#else
- ST.c1 = utf8n_to_uvuni(tmpbuf1, UTF8_MAXBYTES, 0,
- uniflags);
- ST.c2 = utf8n_to_uvuni(tmpbuf2, UTF8_MAXBYTES, 0,
- uniflags);
-#endif
- }
- else {
- ST.c2 = ST.c1 = utf8n_to_uvchr(s, UTF8_MAXBYTES, 0,
- uniflags);
- }
- }
- }
- }
- else
- ST.c1 = ST.c2 = CHRTEST_VOID;
- assume_ok_easy:
-
- ST.A = scan;
- ST.B = next;
- PL_reginput = locinput;
- if (minmod) {
- minmod = 0;
- if (ST.min && regrepeat(rex, ST.A, ST.min, depth) < ST.min)
- sayNO;
- ST.count = ST.min;
- locinput = PL_reginput;
- REGCP_SET(ST.cp);
- if (ST.c1 == CHRTEST_VOID)
- goto curly_try_B_min;
-
- ST.oldloc = locinput;
-
- /* set ST.maxpos to the furthest point along the
- * string that could possibly match */
- if (ST.max == REG_INFTY) {
- ST.maxpos = PL_regeol - 1;
- if (do_utf8)
- while (UTF8_IS_CONTINUATION(*(U8*)ST.maxpos))
- ST.maxpos--;
- }
- else if (do_utf8) {
- int m = ST.max - ST.min;
- for (ST.maxpos = locinput;
- m >0 && ST.maxpos + UTF8SKIP(ST.maxpos) <= PL_regeol; m--)
- ST.maxpos += UTF8SKIP(ST.maxpos);
- }
- else {
- ST.maxpos = locinput + ST.max - ST.min;
- if (ST.maxpos >= PL_regeol)
- ST.maxpos = PL_regeol - 1;
- }
- goto curly_try_B_min_known;
-
- }
- else {
- ST.count = regrepeat(rex, ST.A, ST.max, depth);
- locinput = PL_reginput;
- if (ST.count < ST.min)
- sayNO;
- if ((ST.count > ST.min)
- && (PL_regkind[OP(ST.B)] == EOL) && (OP(ST.B) != MEOL))
- {
- /* A{m,n} must come at the end of the string, there's
- * no point in backing off ... */
- ST.min = ST.count;
- /* ...except that $ and \Z can match before *and* after
- newline at the end. Consider "\n\n" =~ /\n+\Z\n/.
- We may back off by one in this case. */
- if (UCHARAT(PL_reginput - 1) == '\n' && OP(ST.B) != EOS)
- ST.min--;
- }
- REGCP_SET(ST.cp);
- goto curly_try_B_max;
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_known_fail:
- /* failed to find B in a non-greedy match where c1,c2 valid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- PL_reginput = locinput; /* Could be reset... */
- REGCP_UNWIND(ST.cp);
- /* Couldn't or didn't -- move forward. */
- ST.oldloc = locinput;
- if (do_utf8)
- locinput += UTF8SKIP(locinput);
- else
- locinput++;
- ST.count++;
- curly_try_B_min_known:
- /* find the next place where 'B' could work, then call B */
- {
- int n;
- if (do_utf8) {
- n = (ST.oldloc == locinput) ? 0 : 1;
- if (ST.c1 == ST.c2) {
- STRLEN len;
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos &&
- utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags) != (UV)ST.c1) {
- locinput += len;
- n++;
- }
- }
- else {
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos) {
- STRLEN len;
- const UV c = utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags);
- if (c == (UV)ST.c1 || c == (UV)ST.c2)
- break;
- locinput += len;
- n++;
- }
- }
- }
- else {
- if (ST.c1 == ST.c2) {
- while (locinput <= ST.maxpos &&
- UCHARAT(locinput) != ST.c1)
- locinput++;
- }
- else {
- while (locinput <= ST.maxpos
- && UCHARAT(locinput) != ST.c1
- && UCHARAT(locinput) != ST.c2)
- locinput++;
- }
- n = locinput - ST.oldloc;
- }
- if (locinput > ST.maxpos)
- sayNO;
- /* PL_reginput == oldloc now */
- if (n) {
- ST.count += n;
- if (regrepeat(rex, ST.A, n, depth) < n)
- sayNO;
- }
- PL_reginput = locinput;
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min_known, ST.B);
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_fail:
- /* failed to find B in a non-greedy match where c1,c2 invalid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* failed -- move forward one */
- PL_reginput = locinput;
- if (regrepeat(rex, ST.A, 1, depth)) {
- ST.count++;
- locinput = PL_reginput;
- if (ST.count <= ST.max || (ST.max == REG_INFTY &&
- ST.count > 0)) /* count overflow ? */
- {
- curly_try_B_min:
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min, ST.B);
- }
- }
- sayNO;
- /* NOTREACHED */
-
-
- curly_try_B_max:
- /* a successful greedy match: now try to match B */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- {
- UV c = 0;
- if (ST.c1 != CHRTEST_VOID)
- c = do_utf8 ? utf8n_to_uvchr((U8*)PL_reginput,
- UTF8_MAXBYTES, 0, uniflags)
- : (UV) UCHARAT(PL_reginput);
- /* If it could work, try it. */
- if (ST.c1 == CHRTEST_VOID || c == (UV)ST.c1 || c == (UV)ST.c2) {
- CURLY_SETPAREN(ST.paren, ST.count);
- PUSH_STATE_GOTO(CURLY_B_max, ST.B);
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case CURLY_B_max_fail:
- /* failed to find B in a greedy match */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* back up. */
- if (--ST.count < ST.min)
- sayNO;
- PL_reginput = locinput = HOPc(locinput, -1);
- goto curly_try_B_max;
-
-#undef ST
-
- case END:
- fake_end:
- if (cur_eval) {
- /* we've just finished A in /(??{A})B/; now continue with B */
- I32 tmpix;
- st->u.eval.toggle_reg_flags
- = cur_eval->u.eval.toggle_reg_flags;
- PL_reg_flags ^= st->u.eval.toggle_reg_flags;
-
- st->u.eval.prev_rex = rex_sv; /* inner */
- SETREX(rex_sv,cur_eval->u.eval.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- cur_curlyx = cur_eval->u.eval.prev_curlyx;
- ReREFCNT_inc(rex_sv);
- st->u.eval.cp = regcppush(0); /* Save *all* the positions. */
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- REGCP_SET(st->u.eval.lastcp);
- PL_reginput = locinput;
-
- /* Restore parens of the outer rex without popping the
- * savestack */
- tmpix = PL_savestack_ix;
- PL_savestack_ix = cur_eval->u.eval.lastcp;
- regcppop(rex);
- PL_savestack_ix = tmpix;
-
- st->u.eval.prev_eval = cur_eval;
- cur_eval = cur_eval->u.eval.prev_eval;
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log, "%*s EVAL trying tail ... %"UVxf"\n",
- REPORT_CODE_OFF+depth*2, "",PTR2UV(cur_eval)););
- if ( nochange_depth )
- nochange_depth--;
-
- PUSH_YES_STATE_GOTO(EVAL_AB,
- st->u.eval.prev_eval->u.eval.B); /* match B */
- }
-
- if (locinput < reginfo->till) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n",
- PL_colors[4],
- (long)(locinput - PL_reg_starttry),
- (long)(reginfo->till - PL_reg_starttry),
- PL_colors[5]));
-
- sayNO_SILENT; /* Cannot match: too short. */
- }
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
- case SUCCEED: /* successful SUSPEND/UNLESSM/IFMATCH/CURLYM */
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %ssubpattern success...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]));
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
-#undef ST
-#define ST st->u.ifmatch
-
- case SUSPEND: /* (?>A) */
- ST.wanted = 1;
- PL_reginput = locinput;
- goto do_ifmatch;
-
- case UNLESSM: /* -ve lookaround: (?!A), or with flags, (?<!A) */
- ST.wanted = 0;
- goto ifmatch_trivial_fail_test;
-
- case IFMATCH: /* +ve lookaround: (?=A), or with flags, (?<=A) */
- ST.wanted = 1;
- ifmatch_trivial_fail_test:
- if (scan->flags) {
- char * const s = HOPBACKc(locinput, scan->flags);
- if (!s) {
- /* trivial fail */
- if (logical) {
- logical = 0;
- sw = 1 - (bool)ST.wanted;
- }
- else if (ST.wanted)
- sayNO;
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- }
- PL_reginput = s;
- }
- else
- PL_reginput = locinput;
-
- do_ifmatch:
- ST.me = scan;
- ST.logical = logical;
- logical = 0; /* XXX: reset state of logical once it has been saved into ST */
-
- /* execute body of (?...A) */
- PUSH_YES_STATE_GOTO(IFMATCH_A, NEXTOPER(NEXTOPER(scan)));
- /* NOTREACHED */
-
- case IFMATCH_A_fail: /* body of (?...A) failed */
- ST.wanted = !ST.wanted;
- /* FALL THROUGH */
-
- case IFMATCH_A: /* body of (?...A) succeeded */
- if (ST.logical) {
- sw = (bool)ST.wanted;
- }
- else if (!ST.wanted)
- sayNO;
-
- if (OP(ST.me) == SUSPEND)
- locinput = PL_reginput;
- else {
- locinput = PL_reginput = st->locinput;
- nextchr = UCHARAT(locinput);
- }
- scan = ST.me + ARG(ST.me);
- if (scan == ST.me)
- scan = NULL;
- continue; /* execute B */
-
-#undef ST
-
- case LONGJMP:
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- case COMMIT:
- reginfo->cutpoint = PL_regeol;
- /* FALLTHROUGH */
- case PRUNE:
- PL_reginput = locinput;
- if (!scan->flags)
- sv_yes_mark = sv_commit = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(COMMIT_next,next);
- /* NOTREACHED */
- case COMMIT_next_fail:
- no_final = 1;
- /* FALLTHROUGH */
- case OPFAIL:
- sayNO;
- /* NOTREACHED */
-
-#define ST st->u.mark
- case MARKPOINT:
- ST.prev_mark = mark_state;
- ST.mark_name = sv_commit = sv_yes_mark
- = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- mark_state = st;
- ST.mark_loc = PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(MARKPOINT_next,next);
- /* NOTREACHED */
- case MARKPOINT_next:
- mark_state = ST.prev_mark;
- sayYES;
- /* NOTREACHED */
- case MARKPOINT_next_fail:
- if (popmark && sv_eq(ST.mark_name,popmark))
- {
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- popmark = NULL; /* we found our mark */
- sv_commit = ST.mark_name;
-
- DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,
- "%*s %ssetting cutpoint to mark:%"SVf"...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], SVfARG(sv_commit), PL_colors[5]);
- });
- }
- mark_state = ST.prev_mark;
- sv_yes_mark = mark_state ?
- mark_state->u.mark.mark_name : NULL;
- sayNO;
- /* NOTREACHED */
- case SKIP:
- PL_reginput = locinput;
- if (scan->flags) {
- /* (*SKIP) : if we fail we cut here*/
- ST.mark_name = NULL;
- ST.mark_loc = locinput;
- PUSH_STATE_GOTO(SKIP_next,next);
- } else {
- /* (*SKIP:NAME) : if there is a (*MARK:NAME) fail where it was,
- otherwise do nothing. Meaning we need to scan
- */
- regmatch_state *cur = mark_state;
- SV *find = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
-
- while (cur) {
- if ( sv_eq( cur->u.mark.mark_name,
- find ) )
- {
- ST.mark_name = find;
- PUSH_STATE_GOTO( SKIP_next, next );
- }
- cur = cur->u.mark.prev_mark;
- }
- }
- /* Didn't find our (*MARK:NAME) so ignore this (*SKIP:NAME) */
- break;
- case SKIP_next_fail:
- if (ST.mark_name) {
- /* (*CUT:NAME) - Set up to search for the name as we
- collapse the stack*/
- popmark = ST.mark_name;
- } else {
- /* (*CUT) - No name, we cut here.*/
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- /* but we set sv_commit to latest mark_name if there
- is one so they can test to see how things lead to this
- cut */
- if (mark_state)
- sv_commit=mark_state->u.mark.mark_name;
- }
- no_final = 1;
- sayNO;
- /* NOTREACHED */
-#undef ST
- case FOLDCHAR:
- n = ARG(scan);
- if ( n == (U32)what_len_TRICKYFOLD(locinput,do_utf8,ln) ) {
- locinput += ln;
- } else if ( 0xDF == n && !do_utf8 && !UTF ) {
- sayNO;
- } else {
- U8 folded[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const char * const l = locinput;
- char *e = PL_regeol;
- to_uni_fold(n, folded, &foldlen);
-
- if (ibcmp_utf8((const char*) folded, 0, foldlen, 1,
- l, &e, 0, do_utf8)) {
- sayNO;
- }
- locinput = e;
- }
- nextchr = UCHARAT(locinput);
- break;
- case LNBREAK:
- if ((n=is_LNBREAK(locinput,do_utf8))) {
- locinput += n;
- nextchr = UCHARAT(locinput);
- } else
- sayNO;
- break;
-
-#define CASE_CLASS(nAmE) \
- case nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- locinput += n; \
- nextchr = UCHARAT(locinput); \
- } else \
- sayNO; \
- break; \
- case N##nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- sayNO; \
- } else { \
- locinput += UTF8SKIP(locinput); \
- nextchr = UCHARAT(locinput); \
- } \
- break
-
- CASE_CLASS(VERTWS);
- CASE_CLASS(HORIZWS);
-#undef CASE_CLASS
-
- default:
- PerlIO_printf(Perl_error_log, "%"UVxf" %d\n",
- PTR2UV(scan), OP(scan));
- Perl_croak(aTHX_ "regexp memory corruption");
-
- } /* end switch */
-
- /* switch break jumps here */
- scan = next; /* prepare to execute the next op and ... */
- continue; /* ... jump back to the top, reusing st */
- /* NOTREACHED */
-
- push_yes_state:
- /* push a state that backtracks on success */
- st->u.yes.prev_yes_state = yes_state;
- yes_state = st;
- /* FALL THROUGH */
- push_state:
- /* push a new regex state, then continue at scan */
- {
- regmatch_state *newst;
-
- DEBUG_STACK_r({
- regmatch_state *cur = st;
- regmatch_state *curyes = yes_state;
- int curd = depth;
- regmatch_slab *slab = PL_regmatch_slab;
- for (;curd > -1;cur--,curd--) {
- if (cur < SLAB_FIRST(slab)) {
- slab = slab->prev;
- cur = SLAB_LAST(slab);
- }
- PerlIO_printf(Perl_error_log, "%*s#%-3d %-10s %s\n",
- REPORT_CODE_OFF + 2 + depth * 2,"",
- curd, PL_reg_name[cur->resume_state],
- (curyes == cur) ? "yes" : ""
- );
- if (curyes == cur)
- curyes = cur->u.yes.prev_yes_state;
- }
- } else
- DEBUG_STATE_pp("push")
- );
- depth++;
- st->locinput = locinput;
- newst = st+1;
- if (newst > SLAB_LAST(PL_regmatch_slab))
- newst = S_push_slab(aTHX);
- PL_regmatch_state = newst;
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- st = newst;
- continue;
- /* NOTREACHED */
- }
- }
-
- /*
- * We get here only if there's trouble -- normally "case END" is
- * the terminating point.
- */
- Perl_croak(aTHX_ "corrupted regexp pointers");
- /*NOTREACHED*/
- sayNO;
-
-yes:
- if (yes_state) {
- /* we have successfully completed a subexpression, but we must now
- * pop to the state marked by yes_state and continue from there */
- assert(st != yes_state);
-#ifdef DEBUGGING
- while (st != yes_state) {
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- DEBUG_STATE_r({
- if (no_final) {
- DEBUG_STATE_pp("pop (no final)");
- } else {
- DEBUG_STATE_pp("pop (yes)");
- }
- });
- depth--;
- }
-#else
- while (yes_state < SLAB_FIRST(PL_regmatch_slab)
- || yes_state > SLAB_LAST(PL_regmatch_slab))
- {
- /* not in this slab, pop slab */
- depth -= (st - SLAB_FIRST(PL_regmatch_slab) + 1);
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- depth -= (st - yes_state);
-#endif
- st = yes_state;
- yes_state = st->u.yes.prev_yes_state;
- PL_regmatch_state = st;
-
- if (no_final) {
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
- }
- state_num = st->resume_state + no_final;
- goto reenter_switch;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n",
- PL_colors[4], PL_colors[5]));
-
- if (PL_reg_eval_set) {
- /* each successfully executed (?{...}) block does the equivalent of
- * local $^R = do {...}
- * When popping the save stack, all these locals would be undone;
- * bypass this by setting the outermost saved $^R to the latest
- * value */
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- }
- result = 1;
- goto final_exit;
-
-no:
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], PL_colors[5])
- );
-
-no_silent:
- if (no_final) {
- if (yes_state) {
- goto yes;
- } else {
- goto final_exit;
- }
- }
- if (depth) {
- /* there's a previous state to backtrack to */
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- PL_regmatch_state = st;
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
-
- DEBUG_STATE_pp("pop");
- depth--;
- if (yes_state == st)
- yes_state = st->u.yes.prev_yes_state;
-
- state_num = st->resume_state + 1; /* failure = success + 1 */
- goto reenter_switch;
- }
- result = 0;
-
- final_exit:
- if (rex->intflags & PREGf_VERBARG_SEEN) {
- SV *sv_err = get_sv("REGERROR", 1);
- SV *sv_mrk = get_sv("REGMARK", 1);
- if (result) {
- sv_commit = &PL_sv_no;
- if (!sv_yes_mark)
- sv_yes_mark = &PL_sv_yes;
- } else {
- if (!sv_commit)
- sv_commit = &PL_sv_yes;
- sv_yes_mark = &PL_sv_no;
- }
- sv_setsv(sv_err, sv_commit);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- /* clean up; in particular, free all slabs above current one */
- LEAVE_SCOPE(oldsave);
-
- return result;
-}
-
-/*
- - regrepeat - repeatedly match something simple, report how many
- */
-/*
- * [This routine now assumes that it will only match on things of length 1.
- * That was true before, but now we assume scan - reginput is the count,
- * rather than incrementing count on every character. [Er, except utf8.]]
- */
-STATIC I32
-S_regrepeat(pTHX_ const regexp *prog, const regnode *p, I32 max, int depth)
-{
- dVAR;
- register char *scan;
- register I32 c;
- register char *loceol = PL_regeol;
- register I32 hardcount = 0;
- register bool do_utf8 = PL_reg_match_utf8;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_REGREPEAT;
-
- scan = PL_reginput;
- if (max == REG_INFTY)
- max = I32_MAX;
- else if (max < loceol - scan)
- loceol = scan + max;
- switch (OP(p)) {
- case REG_ANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max && *scan != '\n') {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && *scan != '\n')
- scan++;
- }
- break;
- case SANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- }
- else
- scan = loceol;
- break;
- case CANY:
- scan = loceol;
- break;
- case EXACT: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol && UCHARAT(scan) == c)
- scan++;
- break;
- case EXACTF: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c]))
- scan++;
- break;
- case EXACTFL: /* length of string is 1 */
- PL_reg_flags |= RF_tainted;
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c]))
- scan++;
- break;
- case ANYOF:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- reginclass(prog, p, (U8*)scan, 0, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && REGINCLASS(prog, p, (U8*)scan))
- scan++;
- }
- break;
- case ALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM(*scan))
- scan++;
- }
- break;
- case ALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM_LC(*scan))
- scan++;
- }
- break;
- case NALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM(*scan))
- scan++;
- }
- break;
- case NALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM_LC(*scan))
- scan++;
- }
- break;
- case SPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE(*scan))
- scan++;
- }
- break;
- case SPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE_LC(*scan))
- scan++;
- }
- break;
- case NSPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE(*scan))
- scan++;
- }
- break;
- case NSPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE_LC(*scan))
- scan++;
- }
- break;
- case DIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isDIGIT(*scan))
- scan++;
- }
- break;
- case NDIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isDIGIT(*scan))
- scan++;
- }
- case LNBREAK:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_LNBREAK_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- /*
- LNBREAK can match two latin chars, which is ok,
- because we have a null terminated string, but we
- have to use hardcount in this situation
- */
- while (scan < loceol && (c=is_LNBREAK_latin1(scan))) {
- scan+=c;
- hardcount++;
- }
- }
- break;
- case HORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_HORIZWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_HORIZWS_latin1(scan))
- scan++;
- }
- break;
- case NHORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_HORIZWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_HORIZWS_latin1(scan))
- scan++;
-
- }
- break;
- case VERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_VERTWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
- case NVERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_VERTWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
-
- default: /* Called on something of 0 width. */
- break; /* So match right here or not at all. */
- }
-
- if (hardcount)
- c = hardcount;
- else
- c = scan - PL_reginput;
- PL_reginput = scan;
-
- DEBUG_r({
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, p);
- PerlIO_printf(Perl_debug_log,
- "%*s %s can match %"IVdf" times out of %"IVdf"...\n",
- REPORT_CODE_OFF + depth*2, "", SvPVX_const(prop),(IV)c,(IV)max);
- });
- });
-
- return(c);
-}
-
-
-#if !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION)
-/*
-- regclass_swash - prepare the utf8 swash
-*/
-
-SV *
-Perl_regclass_swash(pTHX_ const regexp *prog, register const regnode* node, bool doinit, SV** listsvp, SV **altsvp)
-{
- dVAR;
- SV *sw = NULL;
- SV *si = NULL;
- SV *alt = NULL;
- RXi_GET_DECL(prog,progi);
- const struct reg_data * const data = prog ? progi->data : NULL;
-
- PERL_ARGS_ASSERT_REGCLASS_SWASH;
-
- if (data && data->count) {
- const U32 n = ARG(node);
-
- if (data->what[n] == 's') {
- SV * const rv = MUTABLE_SV(data->data[n]);
- AV * const av = MUTABLE_AV(SvRV(rv));
- SV **const ary = AvARRAY(av);
- SV **a, **b;
-
- /* See the end of regcomp.c:S_regclass() for
- * documentation of these array elements. */
-
- si = *ary;
- a = SvROK(ary[1]) ? &ary[1] : NULL;
- b = SvTYPE(ary[2]) == SVt_PVAV ? &ary[2] : NULL;
-
- if (a)
- sw = *a;
- else if (si && doinit) {
- sw = swash_init("utf8", "", si, 1, 0);
- (void)av_store(av, 1, sw);
- }
- if (b)
- alt = *b;
- }
- }
-
- if (listsvp)
- *listsvp = si;
- if (altsvp)
- *altsvp = alt;
-
- return sw;
-}
-#endif
-
-/*
- - reginclass - determine if a character falls into a character class
-
- The n is the ANYOF regnode, the p is the target string, lenp
- is pointer to the maximum length of how far to go in the p
- (if the lenp is zero, UTF8SKIP(p) is used),
- do_utf8 tells whether the target string is in UTF-8.
-
- */
-
-STATIC bool
-S_reginclass(pTHX_ const regexp *prog, register const regnode *n, register const U8* p, STRLEN* lenp, register bool do_utf8)
-{
- dVAR;
- const char flags = ANYOF_FLAGS(n);
- bool match = FALSE;
- UV c = *p;
- STRLEN len = 0;
- STRLEN plen;
-
- PERL_ARGS_ASSERT_REGINCLASS;
-
- if (do_utf8 && !UTF8_IS_INVARIANT(c)) {
- c = utf8n_to_uvchr(p, UTF8_MAXBYTES, &len,
- (UTF8_ALLOW_DEFAULT & UTF8_ALLOW_ANYUV)
- | UTF8_ALLOW_FFFF | UTF8_CHECK_ONLY);
- /* see [perl #37836] for UTF8_ALLOW_ANYUV; [perl #38293] for
- * UTF8_ALLOW_FFFF */
- if (len == (STRLEN)-1)
- Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)");
- }
-
- plen = lenp ? *lenp : UNISKIP(NATIVE_TO_UNI(c));
- if (do_utf8 || (flags & ANYOF_UNICODE)) {
- if (lenp)
- *lenp = 0;
- if (do_utf8 && !ANYOF_RUNTIME(n)) {
- if (len != (STRLEN)-1 && c < 256 && ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- }
- if (!match && do_utf8 && (flags & ANYOF_UNICODE_ALL) && c >= 256)
- match = TRUE;
- if (!match) {
- AV *av;
- SV * const sw = regclass_swash(prog, n, TRUE, 0, (SV**)&av);
-
- if (sw) {
- U8 * utf8_p;
- if (do_utf8) {
- utf8_p = (U8 *) p;
- } else {
- STRLEN len = 1;
- utf8_p = bytes_to_utf8(p, &len);
- }
- if (swash_fetch(sw, utf8_p, 1))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- if (!match && lenp && av) {
- I32 i;
- for (i = 0; i <= av_len(av); i++) {
- SV* const sv = *av_fetch(av, i, FALSE);
- STRLEN len;
- const char * const s = SvPV_const(sv, len);
- if (len <= plen && memEQ(s, (char*)utf8_p, len)) {
- *lenp = len;
- match = TRUE;
- break;
- }
- }
- }
- if (!match) {
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1];
-
- STRLEN tmplen;
- to_utf8_fold(utf8_p, tmpbuf, &tmplen);
- if (swash_fetch(sw, tmpbuf, 1))
- match = TRUE;
- }
- }
-
- /* If we allocated a string above, free it */
- if (! do_utf8) Safefree(utf8_p);
- }
- }
- if (match && lenp && *lenp == 0)
- *lenp = UNISKIP(NATIVE_TO_UNI(c));
- }
- if (!match && c < 256) {
- if (ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- U8 f;
-
- if (flags & ANYOF_LOCALE) {
- PL_reg_flags |= RF_tainted;
- f = PL_fold_locale[c];
- }
- else
- f = PL_fold[c];
- if (f != c && ANYOF_BITMAP_TEST(n, f))
- match = TRUE;
- }
-
- if (!match && (flags & ANYOF_CLASS)) {
- PL_reg_flags |= RF_tainted;
- if (
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK(c))
- ) /* How's that for a conditional? */
- {
- match = TRUE;
- }
- }
- }
-
- return (flags & ANYOF_INVERT) ? !match : match;
-}
-
-STATIC U8 *
-S_reghop3(U8 *s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-
-#ifdef XXX_dmq
-/* there are a bunch of places where we use two reghop3's that should
- be replaced with this routine. but since thats not done yet
- we ifdef it out - dmq
-*/
-STATIC U8 *
-S_reghop4(U8 *s, I32 off, const U8* llim, const U8* rlim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP4;
-
- if (off >= 0) {
- while (off-- && s < rlim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > llim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > llim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-#endif
-
-STATIC U8 *
-S_reghopmaybe3(U8* s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOPMAYBE3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- if (off >= 0)
- return NULL;
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- if (off <= 0)
- return NULL;
- }
- return s;
-}
-
-static void
-restore_pos(pTHX_ void *arg)
-{
- dVAR;
- regexp * const rex = (regexp *)arg;
- if (PL_reg_eval_set) {
- if (PL_reg_oldsaved) {
- rex->subbeg = PL_reg_oldsaved;
- rex->sublen = PL_reg_oldsavedlen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- rex->saved_copy = PL_nrs;
-#endif
- RXp_MATCH_COPIED_on(rex);
- }
- PL_reg_magic->mg_len = PL_reg_oldpos;
- PL_reg_eval_set = 0;
- PL_curpm = PL_reg_oldcurpm;
- }
-}
-
-STATIC void
-S_to_utf8_substr(pTHX_ register regexp *prog)
-{
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_UTF8_SUBSTR;
-
- do {
- if (prog->substrs->data[i].substr
- && !prog->substrs->data[i].utf8_substr) {
- SV* const sv = newSVsv(prog->substrs->data[i].substr);
- prog->substrs->data[i].utf8_substr = sv;
- sv_utf8_upgrade(sv);
- if (SvVALID(prog->substrs->data[i].substr)) {
- const U8 flags = BmFLAGS(prog->substrs->data[i].substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- /* Whilst this makes the SV technically "invalid" (as its
- buffer is no longer followed by "\0") when fbm_compile()
- adds the "\n" back, a "\0" is restored. */
- }
- fbm_compile(sv, flags);
- }
- if (prog->substrs->data[i].substr == prog->check_substr)
- prog->check_utf8 = sv;
- }
- } while (i--);
-}
-
-STATIC void
-S_to_byte_substr(pTHX_ register regexp *prog)
-{
- dVAR;
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_BYTE_SUBSTR;
-
- do {
- if (prog->substrs->data[i].utf8_substr
- && !prog->substrs->data[i].substr) {
- SV* sv = newSVsv(prog->substrs->data[i].utf8_substr);
- if (sv_utf8_downgrade(sv, TRUE)) {
- if (SvVALID(prog->substrs->data[i].utf8_substr)) {
- const U8 flags
- = BmFLAGS(prog->substrs->data[i].utf8_substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- }
- fbm_compile(sv, flags);
- }
- } else {
- SvREFCNT_dec(sv);
- sv = &PL_sv_undef;
- }
- prog->substrs->data[i].substr = sv;
- if (prog->substrs->data[i].utf8_substr == prog->check_utf8)
- prog->check_substr = sv;
- }
- } while (i--);
-}
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regcomp.c
- */
-
-/*
- * 'A fair jaw-cracker dwarf-language must be.' --Samwise Gamgee
- *
- * [p.285 of _The Lord of the Rings_, II/iii: "The Ring Goes South"]
- */
-
-/* This file contains functions for compiling a regular expression. See
- * also regexec.c which funnily enough, contains functions for executing
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_comp.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
-
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGCOMP_C
-#include "perl.h"
-
-#ifndef PERL_IN_XSUB_RE
-#include "re_defs.h"
-#endif
-
-#define REG_COMP_C
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#ifdef op
-#undef op
-#endif /* op */
-
-#ifdef MSDOS
-# if defined(BUGGY_MSC6)
- /* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */
-# pragma optimize("a",off)
- /* But MSC 6.00A is happy with 'w', for aliases only across function calls*/
-# pragma optimize("w",on )
-# endif /* BUGGY_MSC6 */
-#endif /* MSDOS */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-typedef struct RExC_state_t {
- U32 flags; /* are we folding, multilining? */
- char *precomp; /* uncompiled string. */
- REGEXP *rx_sv; /* The SV that is the regexp. */
- regexp *rx; /* perl core regexp structure */
- regexp_internal *rxi; /* internal data for regexp object pprivate field */
- char *start; /* Start of input for compile */
- char *end; /* End of input for compile */
- char *parse; /* Input-scan pointer. */
- I32 whilem_seen; /* number of WHILEM in this expr */
- regnode *emit_start; /* Start of emitted-code area */
- regnode *emit_bound; /* First regnode outside of the allocated space */
- regnode *emit; /* Code-emit pointer; ®dummy = don't = compiling */
- I32 naughty; /* How bad is this pattern? */
- I32 sawback; /* Did we see \1, ...? */
- U32 seen;
- I32 size; /* Code size. */
- I32 npar; /* Capture buffer count, (OPEN). */
- I32 cpar; /* Capture buffer count, (CLOSE). */
- I32 nestroot; /* root parens we are in - used by accept */
- I32 extralen;
- I32 seen_zerolen;
- I32 seen_evals;
- regnode **open_parens; /* pointers to open parens */
- regnode **close_parens; /* pointers to close parens */
- regnode *opend; /* END node in program */
- I32 utf8; /* whether the pattern is utf8 or not */
- I32 orig_utf8; /* whether the pattern was originally in utf8 */
- /* XXX use this for future optimisation of case
- * where pattern must be upgraded to utf8. */
- HV *paren_names; /* Paren names */
-
- regnode **recurse; /* Recurse regops */
- I32 recurse_count; /* Number of recurse regops */
-#if ADD_TO_REGEXEC
- char *starttry; /* -Dr: where regtry was called. */
-#define RExC_starttry (pRExC_state->starttry)
-#endif
-#ifdef DEBUGGING
- const char *lastparse;
- I32 lastnum;
- AV *paren_name_list; /* idx -> name */
-#define RExC_lastparse (pRExC_state->lastparse)
-#define RExC_lastnum (pRExC_state->lastnum)
-#define RExC_paren_name_list (pRExC_state->paren_name_list)
-#endif
-} RExC_state_t;
-
-#define RExC_flags (pRExC_state->flags)
-#define RExC_precomp (pRExC_state->precomp)
-#define RExC_rx_sv (pRExC_state->rx_sv)
-#define RExC_rx (pRExC_state->rx)
-#define RExC_rxi (pRExC_state->rxi)
-#define RExC_start (pRExC_state->start)
-#define RExC_end (pRExC_state->end)
-#define RExC_parse (pRExC_state->parse)
-#define RExC_whilem_seen (pRExC_state->whilem_seen)
-#ifdef RE_TRACK_PATTERN_OFFSETS
-#define RExC_offsets (pRExC_state->rxi->u.offsets) /* I am not like the others */
-#endif
-#define RExC_emit (pRExC_state->emit)
-#define RExC_emit_start (pRExC_state->emit_start)
-#define RExC_emit_bound (pRExC_state->emit_bound)
-#define RExC_naughty (pRExC_state->naughty)
-#define RExC_sawback (pRExC_state->sawback)
-#define RExC_seen (pRExC_state->seen)
-#define RExC_size (pRExC_state->size)
-#define RExC_npar (pRExC_state->npar)
-#define RExC_nestroot (pRExC_state->nestroot)
-#define RExC_extralen (pRExC_state->extralen)
-#define RExC_seen_zerolen (pRExC_state->seen_zerolen)
-#define RExC_seen_evals (pRExC_state->seen_evals)
-#define RExC_utf8 (pRExC_state->utf8)
-#define RExC_orig_utf8 (pRExC_state->orig_utf8)
-#define RExC_open_parens (pRExC_state->open_parens)
-#define RExC_close_parens (pRExC_state->close_parens)
-#define RExC_opend (pRExC_state->opend)
-#define RExC_paren_names (pRExC_state->paren_names)
-#define RExC_recurse (pRExC_state->recurse)
-#define RExC_recurse_count (pRExC_state->recurse_count)
-
-
-#define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?')
-#define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \
- ((*s) == '{' && regcurly(s)))
-
-#ifdef SPSTART
-#undef SPSTART /* dratted cpp namespace... */
-#endif
-/*
- * Flags to be passed up and down.
- */
-#define WORST 0 /* Worst case. */
-#define HASWIDTH 0x01 /* Known to match non-null strings. */
-#define SIMPLE 0x02 /* Simple enough to be STAR/PLUS operand. */
-#define SPSTART 0x04 /* Starts with * or +. */
-#define TRYAGAIN 0x08 /* Weeded out a declaration. */
-#define POSTPONED 0x10 /* (?1),(?&name), (??{...}) or similar */
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-RExC_emit_start) : -1)
-
-/* whether trie related optimizations are enabled */
-#if PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION
-#define TRIE_STUDY_OPT
-#define FULL_TRIE_STUDY
-#define TRIE_STCLASS
-#endif
-
-
-
-#define PBYTE(u8str,paren) ((U8*)(u8str))[(paren) >> 3]
-#define PBITVAL(paren) (1 << ((paren) & 7))
-#define PAREN_TEST(u8str,paren) ( PBYTE(u8str,paren) & PBITVAL(paren))
-#define PAREN_SET(u8str,paren) PBYTE(u8str,paren) |= PBITVAL(paren)
-#define PAREN_UNSET(u8str,paren) PBYTE(u8str,paren) &= (~PBITVAL(paren))
-
-
-/* About scan_data_t.
-
- During optimisation we recurse through the regexp program performing
- various inplace (keyhole style) optimisations. In addition study_chunk
- and scan_commit populate this data structure with information about
- what strings MUST appear in the pattern. We look for the longest
- string that must appear for at a fixed location, and we look for the
- longest string that may appear at a floating location. So for instance
- in the pattern:
-
- /FOO[xX]A.*B[xX]BAR/
-
- Both 'FOO' and 'A' are fixed strings. Both 'B' and 'BAR' are floating
- strings (because they follow a .* construct). study_chunk will identify
- both FOO and BAR as being the longest fixed and floating strings respectively.
-
- The strings can be composites, for instance
-
- /(f)(o)(o)/
-
- will result in a composite fixed substring 'foo'.
-
- For each string some basic information is maintained:
-
- - offset or min_offset
- This is the position the string must appear at, or not before.
- It also implicitly (when combined with minlenp) tells us how many
- character must match before the string we are searching.
- Likewise when combined with minlenp and the length of the string
- tells us how many characters must appear after the string we have
- found.
-
- - max_offset
- Only used for floating strings. This is the rightmost point that
- the string can appear at. Ifset to I32 max it indicates that the
- string can occur infinitely far to the right.
-
- - minlenp
- A pointer to the minimum length of the pattern that the string
- was found inside. This is important as in the case of positive
- lookahead or positive lookbehind we can have multiple patterns
- involved. Consider
-
- /(?=FOO).*F/
-
- The minimum length of the pattern overall is 3, the minimum length
- of the lookahead part is 3, but the minimum length of the part that
- will actually match is 1. So 'FOO's minimum length is 3, but the
- minimum length for the F is 1. This is important as the minimum length
- is used to determine offsets in front of and behind the string being
- looked for. Since strings can be composites this is the length of the
- pattern at the time it was commited with a scan_commit. Note that
- the length is calculated by study_chunk, so that the minimum lengths
- are not known until the full pattern has been compiled, thus the
- pointer to the value.
-
- - lookbehind
-
- In the case of lookbehind the string being searched for can be
- offset past the start point of the final matching string.
- If this value was just blithely removed from the min_offset it would
- invalidate some of the calculations for how many chars must match
- before or after (as they are derived from min_offset and minlen and
- the length of the string being searched for).
- When the final pattern is compiled and the data is moved from the
- scan_data_t structure into the regexp structure the information
- about lookbehind is factored in, with the information that would
- have been lost precalculated in the end_shift field for the
- associated string.
-
- The fields pos_min and pos_delta are used to store the minimum offset
- and the delta to the maximum offset at the current point in the pattern.
-
-*/
-
-typedef struct scan_data_t {
- /*I32 len_min; unused */
- /*I32 len_delta; unused */
- I32 pos_min;
- I32 pos_delta;
- SV *last_found;
- I32 last_end; /* min value, <0 unless valid. */
- I32 last_start_min;
- I32 last_start_max;
- SV **longest; /* Either &l_fixed, or &l_float. */
- SV *longest_fixed; /* longest fixed string found in pattern */
- I32 offset_fixed; /* offset where it starts */
- I32 *minlen_fixed; /* pointer to the minlen relevent to the string */
- I32 lookbehind_fixed; /* is the position of the string modfied by LB */
- SV *longest_float; /* longest floating string found in pattern */
- I32 offset_float_min; /* earliest point in string it can appear */
- I32 offset_float_max; /* latest point in string it can appear */
- I32 *minlen_float; /* pointer to the minlen relevent to the string */
- I32 lookbehind_float; /* is the position of the string modified by LB */
- I32 flags;
- I32 whilem_c;
- I32 *last_closep;
- struct regnode_charclass_class *start_class;
-} scan_data_t;
-
-/*
- * Forward declarations for pregcomp()'s friends.
- */
-
-static const scan_data_t zero_scan_data =
- { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0};
-
-#define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL)
-#define SF_BEFORE_SEOL 0x0001
-#define SF_BEFORE_MEOL 0x0002
-#define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL)
-#define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL)
-
-#ifdef NO_UNARY_PLUS
-# define SF_FIX_SHIFT_EOL (0+2)
-# define SF_FL_SHIFT_EOL (0+4)
-#else
-# define SF_FIX_SHIFT_EOL (+2)
-# define SF_FL_SHIFT_EOL (+4)
-#endif
-
-#define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL)
-#define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL)
-
-#define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL)
-#define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */
-#define SF_IS_INF 0x0040
-#define SF_HAS_PAR 0x0080
-#define SF_IN_PAR 0x0100
-#define SF_HAS_EVAL 0x0200
-#define SCF_DO_SUBSTR 0x0400
-#define SCF_DO_STCLASS_AND 0x0800
-#define SCF_DO_STCLASS_OR 0x1000
-#define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR)
-#define SCF_WHILEM_VISITED_POS 0x2000
-
-#define SCF_TRIE_RESTUDY 0x4000 /* Do restudy? */
-#define SCF_SEEN_ACCEPT 0x8000
-
-#define UTF (RExC_utf8 != 0)
-#define LOC ((RExC_flags & RXf_PMf_LOCALE) != 0)
-#define FOLD ((RExC_flags & RXf_PMf_FOLD) != 0)
-
-#define OOB_UNICODE 12345678
-#define OOB_NAMEDCLASS -1
-
-#define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b)
-
-
-/* length of regex to show in messages that don't mark a position within */
-#define RegexLengthToShowInErrorMessages 127
-
-/*
- * If MARKER[12] are adjusted, be sure to adjust the constants at the top
- * of t/op/regmesg.t, the tests in t/op/re_tests, and those in
- * op/pragma/warn/regcomp.
- */
-#define MARKER1 "<-- HERE" /* marker as it appears in the description */
-#define MARKER2 " <-- HERE " /* marker as it appears within the regex */
-
-#define REPORT_LOCATION " in regex; marked by " MARKER1 " in m/%.*s" MARKER2 "%s/"
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given
- * arg. Show regex, up to a maximum length. If it's too long, chop and add
- * "...".
- */
-#define _FAIL(code) STMT_START { \
- const char *ellipses = ""; \
- IV len = RExC_end - RExC_precomp; \
- \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- if (len > RegexLengthToShowInErrorMessages) { \
- /* chop 10 shorter than the max, to ensure meaning of "..." */ \
- len = RegexLengthToShowInErrorMessages - 10; \
- ellipses = "..."; \
- } \
- code; \
-} STMT_END
-
-#define FAIL(msg) _FAIL( \
- Perl_croak(aTHX_ "%s in regex m/%.*s%s/", \
- msg, (int)len, RExC_precomp, ellipses))
-
-#define FAIL2(msg,arg) _FAIL( \
- Perl_croak(aTHX_ msg " in regex m/%.*s%s/", \
- arg, (int)len, RExC_precomp, ellipses))
-
-/*
- * Simple_vFAIL -- like FAIL, but marks the current location in the scan
- */
-#define Simple_vFAIL(m) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- Perl_croak(aTHX_ "%s" REPORT_LOCATION, \
- m, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL()
- */
-#define vFAIL(m) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL(m); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts two arguments.
- */
-#define Simple_vFAIL2(m,a1) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2().
- */
-#define vFAIL2(m,a1) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL2(m, a1); \
-} STMT_END
-
-
-/*
- * Like Simple_vFAIL(), but accepts three arguments.
- */
-#define Simple_vFAIL3(m, a1, a2) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-/*
- * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3().
- */
-#define vFAIL3(m,a1,a2) STMT_START { \
- if (!SIZE_ONLY) \
- SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \
- Simple_vFAIL3(m, a1, a2); \
-} STMT_END
-
-/*
- * Like Simple_vFAIL(), but accepts four arguments.
- */
-#define Simple_vFAIL4(m, a1, a2, a3) STMT_START { \
- const IV offset = RExC_parse - RExC_precomp; \
- S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNreg(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARNregdep(loc,m) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_REGEXP), \
- m REPORT_LOCATION, \
- (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN2reg(loc, m, a1) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN3(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN3reg(loc, m, a1, a2) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN4(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define ckWARN4reg(loc, m, a1, a2, a3) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-#define vWARN5(loc, m, a1, a2, a3, a4) STMT_START { \
- const IV offset = loc - RExC_precomp; \
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \
- a1, a2, a3, a4, (int)offset, RExC_precomp, RExC_precomp + offset); \
-} STMT_END
-
-
-/* Allow for side effects in s */
-#define REGC(c,s) STMT_START { \
- if (!SIZE_ONLY) *(s) = (c); else (void)(s); \
-} STMT_END
-
-/* Macros for recording node offsets. 20001227 mjd@plover.com
- * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in
- * element 2*n-1 of the array. Element #2n holds the byte length node #n.
- * Element 0 holds the number n.
- * Position is 1 indexed.
- */
-#ifndef RE_TRACK_PATTERN_OFFSETS
-#define Set_Node_Offset_To_R(node,byte)
-#define Set_Node_Offset(node,byte)
-#define Set_Cur_Node_Offset
-#define Set_Node_Length_To_R(node,len)
-#define Set_Node_Length(node,len)
-#define Set_Node_Cur_Length(node)
-#define Node_Offset(n)
-#define Node_Length(n)
-#define Set_Node_Offset_Length(node,offset,len)
-#define ProgLen(ri) ri->u.proglen
-#define SetProgLen(ri,x) ri->u.proglen = x
-#else
-#define ProgLen(ri) ri->u.offsets[0]
-#define SetProgLen(ri,x) ri->u.offsets[0] = x
-#define Set_Node_Offset_To_R(node,byte) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) offset of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(byte))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Offset macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)-1] = (byte); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Offset(node,byte) \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start)
-#define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse)
-
-#define Set_Node_Length_To_R(node,len) STMT_START { \
- if (! SIZE_ONLY) { \
- MJD_OFFSET_DEBUG(("** (%d) size of node %d is %d.\n", \
- __LINE__, (int)(node), (int)(len))); \
- if((node) < 0) { \
- Perl_croak(aTHX_ "value of node is %d in Length macro", (int)(node)); \
- } else { \
- RExC_offsets[2*(node)] = (len); \
- } \
- } \
-} STMT_END
-
-#define Set_Node_Length(node,len) \
- Set_Node_Length_To_R((node)-RExC_emit_start, len)
-#define Set_Cur_Node_Length(len) Set_Node_Length(RExC_emit, len)
-#define Set_Node_Cur_Length(node) \
- Set_Node_Length(node, RExC_parse - parse_start)
-
-/* Get offsets and lengths */
-#define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1])
-#define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)])
-
-#define Set_Node_Offset_Length(node,offset,len) STMT_START { \
- Set_Node_Offset_To_R((node)-RExC_emit_start, (offset)); \
- Set_Node_Length_To_R((node)-RExC_emit_start, (len)); \
-} STMT_END
-#endif
-
-#if PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS
-#define EXPERIMENTAL_INPLACESCAN
-#endif /*RE_TRACK_PATTERN_OFFSETS*/
-
-#define DEBUG_STUDYDATA(str,data,depth) \
-DEBUG_OPTIMISE_MORE_r(if(data){ \
- PerlIO_printf(Perl_debug_log, \
- "%*s" str "Pos:%"IVdf"/%"IVdf \
- " Flags: 0x%"UVXf" Whilem_c: %"IVdf" Lcp: %"IVdf" %s", \
- (int)(depth)*2, "", \
- (IV)((data)->pos_min), \
- (IV)((data)->pos_delta), \
- (UV)((data)->flags), \
- (IV)((data)->whilem_c), \
- (IV)((data)->last_closep ? *((data)->last_closep) : -1), \
- is_inf ? "INF " : "" \
- ); \
- if ((data)->last_found) \
- PerlIO_printf(Perl_debug_log, \
- "Last:'%s' %"IVdf":%"IVdf"/%"IVdf" %sFixed:'%s' @ %"IVdf \
- " %sFloat: '%s' @ %"IVdf"/%"IVdf"", \
- SvPVX_const((data)->last_found), \
- (IV)((data)->last_end), \
- (IV)((data)->last_start_min), \
- (IV)((data)->last_start_max), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_fixed)) ? "*" : "", \
- SvPVX_const((data)->longest_fixed), \
- (IV)((data)->offset_fixed), \
- ((data)->longest && \
- (data)->longest==&((data)->longest_float)) ? "*" : "", \
- SvPVX_const((data)->longest_float), \
- (IV)((data)->offset_float_min), \
- (IV)((data)->offset_float_max) \
- ); \
- PerlIO_printf(Perl_debug_log,"\n"); \
-});
-
-static void clear_re(pTHX_ void *r);
-
-/* Mark that we cannot extend a found fixed substring at this point.
- Update the longest found anchored substring and the longest found
- floating substrings if needed. */
-
-STATIC void
-S_scan_commit(pTHX_ const RExC_state_t *pRExC_state, scan_data_t *data, I32 *minlenp, int is_inf)
-{
- const STRLEN l = CHR_SVLEN(data->last_found);
- const STRLEN old_l = CHR_SVLEN(*data->longest);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_SCAN_COMMIT;
-
- if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) {
- SvSetMagicSV(*data->longest, data->last_found);
- if (*data->longest == data->longest_fixed) {
- data->offset_fixed = l ? data->last_start_min : data->pos_min;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL);
- else
- data->flags &= ~SF_FIX_BEFORE_EOL;
- data->minlen_fixed=minlenp;
- data->lookbehind_fixed=0;
- }
- else { /* *data->longest == data->longest_float */
- data->offset_float_min = l ? data->last_start_min : data->pos_min;
- data->offset_float_max = (l
- ? data->last_start_max
- : data->pos_min + data->pos_delta);
- if (is_inf || (U32)data->offset_float_max > (U32)I32_MAX)
- data->offset_float_max = I32_MAX;
- if (data->flags & SF_BEFORE_EOL)
- data->flags
- |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL);
- else
- data->flags &= ~SF_FL_BEFORE_EOL;
- data->minlen_float=minlenp;
- data->lookbehind_float=0;
- }
- }
- SvCUR_set(data->last_found, 0);
- {
- SV * const sv = data->last_found;
- if (SvUTF8(sv) && SvMAGICAL(sv)) {
- MAGIC * const mg = mg_find(sv, PERL_MAGIC_utf8);
- if (mg)
- mg->mg_len = 0;
- }
- }
- data->last_end = -1;
- data->flags &= ~SF_BEFORE_EOL;
- DEBUG_STUDYDATA("commit: ",data,0);
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_anything(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_ANYTHING;
-
- ANYOF_CLASS_ZERO(cl);
- ANYOF_BITMAP_SETALL(cl);
- cl->flags = ANYOF_EOS|ANYOF_UNICODE_ALL;
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* Can match anything (initialization) */
-STATIC int
-S_cl_is_anything(const struct regnode_charclass_class *cl)
-{
- int value;
-
- PERL_ARGS_ASSERT_CL_IS_ANYTHING;
-
- for (value = 0; value <= ANYOF_MAX; value += 2)
- if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1))
- return 1;
- if (!(cl->flags & ANYOF_UNICODE_ALL))
- return 0;
- if (!ANYOF_BITMAP_TESTALLSET((const void*)cl))
- return 0;
- return 1;
-}
-
-/* Can match anything (initialization) */
-STATIC void
-S_cl_init(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
-}
-
-STATIC void
-S_cl_init_zero(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
-{
- PERL_ARGS_ASSERT_CL_INIT_ZERO;
-
- Zero(cl, 1, struct regnode_charclass_class);
- cl->type = ANYOF;
- cl_anything(pRExC_state, cl);
- if (LOC)
- cl->flags |= ANYOF_LOCALE;
-}
-
-/* 'And' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_and(struct regnode_charclass_class *cl,
- const struct regnode_charclass_class *and_with)
-{
- PERL_ARGS_ASSERT_CL_AND;
-
- assert(and_with->type == ANYOF);
- if (!(and_with->flags & ANYOF_CLASS)
- && !(cl->flags & ANYOF_CLASS)
- && (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(and_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD)) {
- int i;
-
- if (and_with->flags & ANYOF_INVERT)
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= ~and_with->bitmap[i];
- else
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] &= and_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise, leave it along for a moment. */
- if (!(and_with->flags & ANYOF_EOS))
- cl->flags &= ~ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE_ALL && and_with->flags & ANYOF_UNICODE &&
- !(and_with->flags & ANYOF_INVERT)) {
- cl->flags &= ~ANYOF_UNICODE_ALL;
- cl->flags |= ANYOF_UNICODE;
- ARG_SET(cl, ARG(and_with));
- }
- if (!(and_with->flags & ANYOF_UNICODE_ALL) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE_ALL;
- if (!(and_with->flags & (ANYOF_UNICODE|ANYOF_UNICODE_ALL)) &&
- !(and_with->flags & ANYOF_INVERT))
- cl->flags &= ~ANYOF_UNICODE;
-}
-
-/* 'OR' a given class with another one. Can create false positives */
-/* We assume that cl is not inverted */
-STATIC void
-S_cl_or(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl, const struct regnode_charclass_class *or_with)
-{
- PERL_ARGS_ASSERT_CL_OR;
-
- if (or_with->flags & ANYOF_INVERT) {
- /* We do not use
- * (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2))
- * <= (B1 | !B2) | (CL1 | !CL2)
- * which is wasteful if CL2 is small, but we ignore CL2:
- * (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1
- * XXXX Can we handle case-fold? Unclear:
- * (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) =
- * (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i'))
- */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && !(or_with->flags & ANYOF_FOLD)
- && !(cl->flags & ANYOF_FOLD) ) {
- int i;
-
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= ~or_with->bitmap[i];
- } /* XXXX: logic is complicated otherwise */
- else {
- cl_anything(pRExC_state, cl);
- }
- } else {
- /* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */
- if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
- && (!(or_with->flags & ANYOF_FOLD)
- || (cl->flags & ANYOF_FOLD)) ) {
- int i;
-
- /* OR char bitmap and class bitmap separately */
- for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
- cl->bitmap[i] |= or_with->bitmap[i];
- if (or_with->flags & ANYOF_CLASS) {
- for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++)
- cl->classflags[i] |= or_with->classflags[i];
- cl->flags |= ANYOF_CLASS;
- }
- }
- else { /* XXXX: logic is complicated, leave it along for a moment. */
- cl_anything(pRExC_state, cl);
- }
- }
- if (or_with->flags & ANYOF_EOS)
- cl->flags |= ANYOF_EOS;
-
- if (cl->flags & ANYOF_UNICODE && or_with->flags & ANYOF_UNICODE &&
- ARG(cl) != ARG(or_with)) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
- if (or_with->flags & ANYOF_UNICODE_ALL) {
- cl->flags |= ANYOF_UNICODE_ALL;
- cl->flags &= ~ANYOF_UNICODE;
- }
-}
-
-#define TRIE_LIST_ITEM(state,idx) (trie->states[state].trans.list)[ idx ]
-#define TRIE_LIST_CUR(state) ( TRIE_LIST_ITEM( state, 0 ).forid )
-#define TRIE_LIST_LEN(state) ( TRIE_LIST_ITEM( state, 0 ).newstate )
-#define TRIE_LIST_USED(idx) ( trie->states[state].trans.list ? (TRIE_LIST_CUR( idx ) - 1) : 0 )
-
-
-#ifdef DEBUGGING
-/*
- dump_trie(trie,widecharmap,revcharmap)
- dump_trie_interim_list(trie,widecharmap,revcharmap,next_alloc)
- dump_trie_interim_table(trie,widecharmap,revcharmap,next_alloc)
-
- These routines dump out a trie in a somewhat readable format.
- The _interim_ variants are used for debugging the interim
- tables that are used to generate the final compressed
- representation which is what dump_trie expects.
-
- Part of the reason for their existance is to provide a form
- of documentation as to how the different representations function.
-
-*/
-
-/*
- Dumps the final compressed table form of the trie to Perl_debug_log.
- Used for debugging make_trie().
-*/
-
-STATIC void
-S_dump_trie(pTHX_ const struct _reg_trie_data *trie, HV *widecharmap,
- AV *revcharmap, U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE;
-
- PerlIO_printf( Perl_debug_log, "%*sChar : %-6s%-6s%-4s ",
- (int)depth * 2 + 2,"",
- "Match","Base","Ofs" );
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ ) {
- SV ** const tmp = av_fetch( revcharmap, state, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
- PerlIO_printf( Perl_debug_log, "\n%*sState|-----------------------",
- (int)depth * 2 + 2,"");
-
- for( state = 0 ; state < trie->uniquecharcount ; state++ )
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth, "--------");
- PerlIO_printf( Perl_debug_log, "\n");
-
- for( state = 1 ; state < trie->statecount ; state++ ) {
- const U32 base = trie->states[ state ].trans.base;
-
- PerlIO_printf( Perl_debug_log, "%*s#%4"UVXf"|", (int)depth * 2 + 2,"", (UV)state);
-
- if ( trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " W%4X", trie->states[ state ].wordnum );
- } else {
- PerlIO_printf( Perl_debug_log, "%6s", "" );
- }
-
- PerlIO_printf( Perl_debug_log, " @%4"UVXf" ", (UV)base );
-
- if ( base ) {
- U32 ofs = 0;
-
- while( ( base + ofs < trie->uniquecharcount ) ||
- ( base + ofs - trie->uniquecharcount < trie->lasttrans
- && trie->trans[ base + ofs - trie->uniquecharcount ].check != state))
- ofs++;
-
- PerlIO_printf( Perl_debug_log, "+%2"UVXf"[ ", (UV)ofs);
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- PerlIO_printf( Perl_debug_log, "%*"UVXf,
- colwidth,
- (UV)trie->trans[ base + ofs - trie->uniquecharcount ].next );
- } else {
- PerlIO_printf( Perl_debug_log, "%*s",colwidth," ." );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "]");
-
- }
- PerlIO_printf( Perl_debug_log, "\n" );
- }
-}
-/*
- Dumps a fully constructed but uncompressed trie in list form.
- List tries normally only are used for construction when the number of
- possible chars (trie->uniquecharcount) is very high.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_list(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_LIST;
-
- /* print out the table precompression. */
- PerlIO_printf( Perl_debug_log, "%*sState :Word | Transition Data\n%*s%s",
- (int)depth * 2 + 2,"", (int)depth * 2 + 2,"",
- "------:-----+-----------------\n" );
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U16 charid;
-
- PerlIO_printf( Perl_debug_log, "%*s %4"UVXf" :",
- (int)depth * 2 + 2,"", (UV)state );
- if ( ! trie->states[ state ].wordnum ) {
- PerlIO_printf( Perl_debug_log, "%5s| ","");
- } else {
- PerlIO_printf( Perl_debug_log, "W%4x| ",
- trie->states[ state ].wordnum
- );
- }
- for( charid = 1 ; charid <= TRIE_LIST_USED( state ) ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, TRIE_LIST_ITEM(state,charid).forid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s:%3X=%4"UVXf" | ",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- ) ,
- TRIE_LIST_ITEM(state,charid).forid,
- (UV)TRIE_LIST_ITEM(state,charid).newstate
- );
- if (!(charid % 10))
- PerlIO_printf(Perl_debug_log, "\n%*s| ",
- (int)((depth * 2) + 14), "");
- }
- }
- PerlIO_printf( Perl_debug_log, "\n");
- }
-}
-
-/*
- Dumps a fully constructed but uncompressed trie in table form.
- This is the normal DFA style state transition table, with a few
- twists to facilitate compression later.
- Used for debugging make_trie().
-*/
-STATIC void
-S_dump_trie_interim_table(pTHX_ const struct _reg_trie_data *trie,
- HV *widecharmap, AV *revcharmap, U32 next_alloc,
- U32 depth)
-{
- U32 state;
- U16 charid;
- SV *sv=sv_newmortal();
- int colwidth= widecharmap ? 6 : 4;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_TABLE;
-
- /*
- print out the table precompression so that we can do a visual check
- that they are identical.
- */
-
- PerlIO_printf( Perl_debug_log, "%*sChar : ",(int)depth * 2 + 2,"" );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- SV ** const tmp = av_fetch( revcharmap, charid, 0);
- if ( tmp ) {
- PerlIO_printf( Perl_debug_log, "%*s",
- colwidth,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- }
- }
-
- PerlIO_printf( Perl_debug_log, "\n%*sState+-",(int)depth * 2 + 2,"" );
-
- for( charid=0 ; charid < trie->uniquecharcount ; charid++ ) {
- PerlIO_printf( Perl_debug_log, "%.*s", colwidth,"--------");
- }
-
- PerlIO_printf( Perl_debug_log, "\n" );
-
- for( state=1 ; state < next_alloc ; state += trie->uniquecharcount ) {
-
- PerlIO_printf( Perl_debug_log, "%*s%4"UVXf" : ",
- (int)depth * 2 + 2,"",
- (UV)TRIE_NODENUM( state ) );
-
- for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) {
- UV v=(UV)SAFE_TRIE_NODENUM( trie->trans[ state + charid ].next );
- if (v)
- PerlIO_printf( Perl_debug_log, "%*"UVXf, colwidth, v );
- else
- PerlIO_printf( Perl_debug_log, "%*s", colwidth, "." );
- }
- if ( ! trie->states[ TRIE_NODENUM( state ) ].wordnum ) {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf")\n", (UV)trie->trans[ state ].check );
- } else {
- PerlIO_printf( Perl_debug_log, " (%4"UVXf") W%4X\n", (UV)trie->trans[ state ].check,
- trie->states[ TRIE_NODENUM( state ) ].wordnum );
- }
- }
-}
-
-#endif
-
-/* make_trie(startbranch,first,last,tail,word_count,flags,depth)
- startbranch: the first branch in the whole branch sequence
- first : start branch of sequence of branch-exact nodes.
- May be the same as startbranch
- last : Thing following the last branch.
- May be the same as tail.
- tail : item following the branch sequence
- count : words in the sequence
- flags : currently the OP() type we will be building one of /EXACT(|F|Fl)/
- depth : indent depth
-
-Inplace optimizes a sequence of 2 or more Branch-Exact nodes into a TRIE node.
-
-A trie is an N'ary tree where the branches are determined by digital
-decomposition of the key. IE, at the root node you look up the 1st character and
-follow that branch repeat until you find the end of the branches. Nodes can be
-marked as "accepting" meaning they represent a complete word. Eg:
-
- /he|she|his|hers/
-
-would convert into the following structure. Numbers represent states, letters
-following numbers represent valid transitions on the letter from that state, if
-the number is in square brackets it represents an accepting state, otherwise it
-will be in parenthesis.
-
- +-h->+-e->[3]-+-r->(8)-+-s->[9]
- | |
- | (2)
- | |
- (1) +-i->(6)-+-s->[7]
- |
- +-s->(3)-+-h->(4)-+-e->[5]
-
- Accept Word Mapping: 3=>1 (he),5=>2 (she), 7=>3 (his), 9=>4 (hers)
-
-This shows that when matching against the string 'hers' we will begin at state 1
-read 'h' and move to state 2, read 'e' and move to state 3 which is accepting,
-then read 'r' and go to state 8 followed by 's' which takes us to state 9 which
-is also accepting. Thus we know that we can match both 'he' and 'hers' with a
-single traverse. We store a mapping from accepting to state to which word was
-matched, and then when we have multiple possibilities we try to complete the
-rest of the regex in the order in which they occured in the alternation.
-
-The only prior NFA like behaviour that would be changed by the TRIE support is
-the silent ignoring of duplicate alternations which are of the form:
-
- / (DUPE|DUPE) X? (?{ ... }) Y /x
-
-Thus EVAL blocks follwing a trie may be called a different number of times with
-and without the optimisation. With the optimisations dupes will be silently
-ignored. This inconsistant behaviour of EVAL type nodes is well established as
-the following demonstrates:
-
- 'words'=~/(word|word|word)(?{ print $1 })[xyz]/
-
-which prints out 'word' three times, but
-
- 'words'=~/(word|word|word)(?{ print $1 })S/
-
-which doesnt print it out at all. This is due to other optimisations kicking in.
-
-Example of what happens on a structural level:
-
-The regexp /(ac|ad|ab)+/ will produce the folowing debug output:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: BRANCH(8)
- 6: EXACT <ac>(16)
- 8: BRANCH(11)
- 9: EXACT <ad>(16)
- 11: BRANCH(14)
- 12: EXACT <ab>(16)
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-This would be optimizable with startbranch=5, first=5, last=16, tail=16
-and should turn into:
-
- 1: CURLYM[1] {1,32767}(18)
- 5: TRIE(16)
- [Words:3 Chars Stored:6 Unique Chars:4 States:5 NCP:1]
- <ac>
- <ad>
- <ab>
- 16: SUCCEED(0)
- 17: NOTHING(18)
- 18: END(0)
-
-Cases where tail != last would be like /(?foo|bar)baz/:
-
- 1: BRANCH(4)
- 2: EXACT <foo>(8)
- 4: BRANCH(7)
- 5: EXACT <bar>(8)
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
-which would be optimizable with startbranch=1, first=1, last=7, tail=8
-and would end up looking like:
-
- 1: TRIE(8)
- [Words:2 Chars Stored:6 Unique Chars:5 States:7 NCP:1]
- <foo>
- <bar>
- 7: TAIL(8)
- 8: EXACT <baz>(10)
- 10: END(0)
-
- d = uvuni_to_utf8_flags(d, uv, 0);
-
-is the recommended Unicode-aware way of saying
-
- *(d++) = uv;
-*/
-
-#define TRIE_STORE_REVCHAR \
- STMT_START { \
- if (UTF) { \
- SV *zlopp = newSV(2); \
- unsigned char *flrbbbbb = (unsigned char *) SvPVX(zlopp); \
- unsigned const char *const kapow = uvuni_to_utf8(flrbbbbb, uvc & 0xFF); \
- SvCUR_set(zlopp, kapow - flrbbbbb); \
- SvPOK_on(zlopp); \
- SvUTF8_on(zlopp); \
- av_push(revcharmap, zlopp); \
- } else { \
- char ooooff = (char)uvc; \
- av_push(revcharmap, newSVpvn(&ooooff, 1)); \
- } \
- } STMT_END
-
-#define TRIE_READ_CHAR STMT_START { \
- wordlen++; \
- if ( UTF ) { \
- if ( folder ) { \
- if ( foldlen > 0 ) { \
- uvc = utf8n_to_uvuni( scan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- scan += len; \
- len = 0; \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- scan = foldbuf + UNISKIP( uvc ); \
- } \
- } else { \
- uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\
- } \
- } else { \
- uvc = (U32)*uc; \
- len = 1; \
- } \
-} STMT_END
-
-
-
-#define TRIE_LIST_PUSH(state,fid,ns) STMT_START { \
- if ( TRIE_LIST_CUR( state ) >=TRIE_LIST_LEN( state ) ) { \
- U32 ging = TRIE_LIST_LEN( state ) *= 2; \
- Renew( trie->states[ state ].trans.list, ging, reg_trie_trans_le ); \
- } \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).forid = fid; \
- TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).newstate = ns; \
- TRIE_LIST_CUR( state )++; \
-} STMT_END
-
-#define TRIE_LIST_NEW(state) STMT_START { \
- Newxz( trie->states[ state ].trans.list, \
- 4, reg_trie_trans_le ); \
- TRIE_LIST_CUR( state ) = 1; \
- TRIE_LIST_LEN( state ) = 4; \
-} STMT_END
-
-#define TRIE_HANDLE_WORD(state) STMT_START { \
- U16 dupe= trie->states[ state ].wordnum; \
- regnode * const noper_next = regnext( noper ); \
- \
- if (trie->wordlen) \
- trie->wordlen[ curword ] = wordlen; \
- DEBUG_r({ \
- /* store the word for dumping */ \
- SV* tmp; \
- if (OP(noper) != NOTHING) \
- tmp = newSVpvn_utf8(STRING(noper), STR_LEN(noper), UTF); \
- else \
- tmp = newSVpvn_utf8( "", 0, UTF ); \
- av_push( trie_words, tmp ); \
- }); \
- \
- curword++; \
- \
- if ( noper_next < tail ) { \
- if (!trie->jump) \
- trie->jump = (U16 *) PerlMemShared_calloc( word_count + 1, sizeof(U16) ); \
- trie->jump[curword] = (U16)(noper_next - convert); \
- if (!jumper) \
- jumper = noper_next; \
- if (!nextbranch) \
- nextbranch= regnext(cur); \
- } \
- \
- if ( dupe ) { \
- /* So it's a dupe. This means we need to maintain a */\
- /* linked-list from the first to the next. */\
- /* we only allocate the nextword buffer when there */\
- /* a dupe, so first time we have to do the allocation */\
- if (!trie->nextword) \
- trie->nextword = (U16 *) \
- PerlMemShared_calloc( word_count + 1, sizeof(U16)); \
- while ( trie->nextword[dupe] ) \
- dupe= trie->nextword[dupe]; \
- trie->nextword[dupe]= curword; \
- } else { \
- /* we haven't inserted this word yet. */ \
- trie->states[ state ].wordnum = curword; \
- } \
-} STMT_END
-
-
-#define TRIE_TRANS_STATE(state,base,ucharcount,charid,special) \
- ( ( base + charid >= ucharcount \
- && base + charid < ubound \
- && state == trie->trans[ base - ucharcount + charid ].check \
- && trie->trans[ base - ucharcount + charid ].next ) \
- ? trie->trans[ base - ucharcount + charid ].next \
- : ( state==1 ? special : 0 ) \
- )
-
-#define MADE_TRIE 1
-#define MADE_JUMP_TRIE 2
-#define MADE_EXACT_TRIE 4
-
-STATIC I32
-S_make_trie(pTHX_ RExC_state_t *pRExC_state, regnode *startbranch, regnode *first, regnode *last, regnode *tail, U32 word_count, U32 flags, U32 depth)
-{
- dVAR;
- /* first pass, loop through and scan words */
- reg_trie_data *trie;
- HV *widecharmap = NULL;
- AV *revcharmap = newAV();
- regnode *cur;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- STRLEN len = 0;
- UV uvc = 0;
- U16 curword = 0;
- U32 next_alloc = 0;
- regnode *jumper = NULL;
- regnode *nextbranch = NULL;
- regnode *convert = NULL;
- /* we just use folder as a flag in utf8 */
- const U8 * const folder = ( flags == EXACTF
- ? PL_fold
- : ( flags == EXACTFL
- ? PL_fold_locale
- : NULL
- )
- );
-
-#ifdef DEBUGGING
- const U32 data_slot = add_data( pRExC_state, 4, "tuuu" );
- AV *trie_words = NULL;
- /* along with revcharmap, this only used during construction but both are
- * useful during debugging so we store them in the struct when debugging.
- */
-#else
- const U32 data_slot = add_data( pRExC_state, 2, "tu" );
- STRLEN trie_charcount=0;
-#endif
- SV *re_trie_maxbuff;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- trie = (reg_trie_data *) PerlMemShared_calloc( 1, sizeof(reg_trie_data) );
- trie->refcount = 1;
- trie->startstate = 1;
- trie->wordcount = word_count;
- RExC_rxi->data->data[ data_slot ] = (void*)trie;
- trie->charmap = (U16 *) PerlMemShared_calloc( 256, sizeof(U16) );
- if (!(UTF && folder))
- trie->bitmap = (char *) PerlMemShared_calloc( ANYOF_BITMAP_SIZE, 1 );
- DEBUG_r({
- trie_words = newAV();
- });
-
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff)) {
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- DEBUG_OPTIMISE_r({
- PerlIO_printf( Perl_debug_log,
- "%*smake_trie start==%d, first==%d, last==%d, tail==%d depth=%d\n",
- (int)depth * 2 + 2, "",
- REG_NODE_NUM(startbranch),REG_NODE_NUM(first),
- REG_NODE_NUM(last), REG_NODE_NUM(tail),
- (int)depth);
- });
-
- /* Find the node we are going to overwrite */
- if ( first == startbranch && OP( last ) != BRANCH ) {
- /* whole branch chain */
- convert = first;
- } else {
- /* branch sub-chain */
- convert = NEXTOPER( first );
- }
-
- /* -- First loop and Setup --
-
- We first traverse the branches and scan each word to determine if it
- contains widechars, and how many unique chars there are, this is
- important as we have to build a table with at least as many columns as we
- have unique chars.
-
- We use an array of integers to represent the character codes 0..255
- (trie->charmap) and we use a an HV* to store Unicode characters. We use the
- native representation of the character value as the key and IV's for the
- coded index.
-
- *TODO* If we keep track of how many times each character is used we can
- remap the columns so that the table compression later on is more
- efficient in terms of memory by ensuring most common value is in the
- middle and the least common are on the outside. IMO this would be better
- than a most to least common mapping as theres a decent chance the most
- common letter will share a node with the least common, meaning the node
- will not be compressable. With a middle is most common approach the worst
- case is when we have the least common nodes twice.
-
- */
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- STRLEN foldlen = 0;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- const U8 *scan = (U8*)NULL;
- U32 wordlen = 0; /* required init */
- STRLEN chars = 0;
- bool set_bit = trie->bitmap ? 1 : 0; /*store the first char in the bitmap?*/
-
- if (OP(noper) == NOTHING) {
- trie->minlen= 0;
- continue;
- }
- if ( set_bit ) /* bitmap only alloced when !(UTF&&Folding) */
- TRIE_BITMAP_SET(trie,*uc); /* store the raw first byte
- regardless of encoding */
-
- for ( ; uc < e ; uc += len ) {
- TRIE_CHARCOUNT(trie)++;
- TRIE_READ_CHAR;
- chars++;
- if ( uvc < 256 ) {
- if ( !trie->charmap[ uvc ] ) {
- trie->charmap[ uvc ]=( ++trie->uniquecharcount );
- if ( folder )
- trie->charmap[ folder[ uvc ] ] = trie->charmap[ uvc ];
- TRIE_STORE_REVCHAR;
- }
- if ( set_bit ) {
- /* store the codepoint in the bitmap, and if its ascii
- also store its folded equivelent. */
- TRIE_BITMAP_SET(trie,uvc);
-
- /* store the folded codepoint */
- if ( folder ) TRIE_BITMAP_SET(trie,folder[ uvc ]);
-
- if ( !UTF ) {
- /* store first byte of utf8 representation of
- codepoints in the 127 < uvc < 256 range */
- if (127 < uvc && uvc < 192) {
- TRIE_BITMAP_SET(trie,194);
- } else if (191 < uvc ) {
- TRIE_BITMAP_SET(trie,195);
- /* && uvc < 256 -- we know uvc is < 256 already */
- }
- }
- set_bit = 0; /* We've done our bit :-) */
- }
- } else {
- SV** svpp;
- if ( !widecharmap )
- widecharmap = newHV();
-
- svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 1 );
-
- if ( !svpp )
- Perl_croak( aTHX_ "error creating/fetching widecharmap entry for 0x%"UVXf, uvc );
-
- if ( !SvTRUE( *svpp ) ) {
- sv_setiv( *svpp, ++trie->uniquecharcount );
- TRIE_STORE_REVCHAR;
- }
- }
- }
- if( cur == first ) {
- trie->minlen=chars;
- trie->maxlen=chars;
- } else if (chars < trie->minlen) {
- trie->minlen=chars;
- } else if (chars > trie->maxlen) {
- trie->maxlen=chars;
- }
-
- } /* end first pass */
- DEBUG_TRIE_COMPILE_r(
- PerlIO_printf( Perl_debug_log, "%*sTRIE(%s): W:%d C:%d Uq:%d Min:%d Max:%d\n",
- (int)depth * 2 + 2,"",
- ( widecharmap ? "UTF8" : "NATIVE" ), (int)word_count,
- (int)TRIE_CHARCOUNT(trie), trie->uniquecharcount,
- (int)trie->minlen, (int)trie->maxlen )
- );
- trie->wordlen = (U32 *) PerlMemShared_calloc( word_count, sizeof(U32) );
-
- /*
- We now know what we are dealing with in terms of unique chars and
- string sizes so we can calculate how much memory a naive
- representation using a flat table will take. If it's over a reasonable
- limit (as specified by ${^RE_TRIE_MAXBUF}) we use a more memory
- conservative but potentially much slower representation using an array
- of lists.
-
- At the end we convert both representations into the same compressed
- form that will be used in regexec.c for matching with. The latter
- is a form that cannot be used to construct with but has memory
- properties similar to the list form and access properties similar
- to the table form making it both suitable for fast searches and
- small enough that its feasable to store for the duration of a program.
-
- See the comment in the code where the compressed table is produced
- inplace from the flat tabe representation for an explanation of how
- the compression works.
-
- */
-
-
- if ( (IV)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1) > SvIV(re_trie_maxbuff) ) {
- /*
- Second Pass -- Array Of Lists Representation
-
- Each state will be represented by a list of charid:state records
- (reg_trie_trans_le) the first such element holds the CUR and LEN
- points of the allocated array. (See defines above).
-
- We build the initial structure using the lists, and then convert
- it into the compressed table form which allows faster lookups
- (but cant be modified once converted).
- */
-
- STRLEN transcount = 1;
-
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using list compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- TRIE_LIST_NEW(1);
- next_alloc = 2;
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
- U32 state = 1; /* required init */
- U16 charid = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if (OP(noper) != NOTHING) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV** const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- if ( !svpp ) {
- charid = 0;
- } else {
- charid=(U16)SvIV( *svpp );
- }
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- if ( charid ) {
-
- U16 check;
- U32 newstate = 0;
-
- charid--;
- if ( !trie->states[ state ].trans.list ) {
- TRIE_LIST_NEW( state );
- }
- for ( check = 1; check <= TRIE_LIST_USED( state ); check++ ) {
- if ( TRIE_LIST_ITEM( state, check ).forid == charid ) {
- newstate = TRIE_LIST_ITEM( state, check ).newstate;
- break;
- }
- }
- if ( ! newstate ) {
- newstate = next_alloc++;
- TRIE_LIST_PUSH( state, charid, newstate );
- transcount++;
- }
- state = newstate;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- }
- }
- TRIE_HANDLE_WORD(state);
-
- } /* end second pass */
-
- /* next alloc is the NEXT state to be allocated */
- trie->statecount = next_alloc;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states,
- next_alloc
- * sizeof(reg_trie_state) );
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_list(trie, widecharmap,
- revcharmap, next_alloc,
- depth+1)
- );
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( transcount, sizeof(reg_trie_trans) );
- {
- U32 state;
- U32 tp = 0;
- U32 zp = 0;
-
-
- for( state=1 ; state < next_alloc ; state ++ ) {
- U32 base=0;
-
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, "tp: %d zp: %d ",tp,zp)
- );
- */
-
- if (trie->states[state].trans.list) {
- U16 minid=TRIE_LIST_ITEM( state, 1).forid;
- U16 maxid=minid;
- U16 idx;
-
- for( idx = 2 ; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U16 forid = TRIE_LIST_ITEM( state, idx).forid;
- if ( forid < minid ) {
- minid=forid;
- } else if ( forid > maxid ) {
- maxid=forid;
- }
- }
- if ( transcount < tp + maxid - minid + 1) {
- transcount *= 2;
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans,
- transcount
- * sizeof(reg_trie_trans) );
- Zero( trie->trans + (transcount / 2), transcount / 2 , reg_trie_trans );
- }
- base = trie->uniquecharcount + tp - minid;
- if ( maxid == minid ) {
- U32 set = 0;
- for ( ; zp < tp ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- base = trie->uniquecharcount + zp - minid;
- trie->trans[ zp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ zp ].check = state;
- set = 1;
- break;
- }
- }
- if ( !set ) {
- trie->trans[ tp ].next = TRIE_LIST_ITEM( state, 1).newstate;
- trie->trans[ tp ].check = state;
- tp++;
- zp = tp;
- }
- } else {
- for ( idx=1; idx <= TRIE_LIST_USED( state ) ; idx++ ) {
- const U32 tid = base - trie->uniquecharcount + TRIE_LIST_ITEM( state, idx ).forid;
- trie->trans[ tid ].next = TRIE_LIST_ITEM( state, idx ).newstate;
- trie->trans[ tid ].check = state;
- }
- tp += ( maxid - minid + 1 );
- }
- Safefree(trie->states[ state ].trans.list);
- }
- /*
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log, " base: %d\n",base);
- );
- */
- trie->states[ state ].trans.base=base;
- }
- trie->lasttrans = tp + 1;
- }
- } else {
- /*
- Second Pass -- Flat Table Representation.
-
- we dont use the 0 slot of either trans[] or states[] so we add 1 to each.
- We know that we will need Charcount+1 trans at most to store the data
- (one row per char at worst case) So we preallocate both structures
- assuming worst case.
-
- We then construct the trie using only the .next slots of the entry
- structs.
-
- We use the .check field of the first entry of the node temporarily to
- make compression both faster and easier by keeping track of how many non
- zero fields are in the node.
-
- Since trans are numbered from 1 any 0 pointer in the table is a FAIL
- transition.
-
- There are two terms at use here: state as a TRIE_NODEIDX() which is a
- number representing the first entry of the node, and state as a
- TRIE_NODENUM() which is the trans number. state 1 is TRIE_NODEIDX(1) and
- TRIE_NODENUM(1), state 2 is TRIE_NODEIDX(2) and TRIE_NODENUM(3) if there
- are 2 entrys per node. eg:
-
- A B A B
- 1. 2 4 1. 3 7
- 2. 0 3 3. 0 5
- 3. 0 0 5. 0 0
- 4. 0 0 7. 0 0
-
- The table is internally in the right hand, idx form. However as we also
- have to deal with the states array which is indexed by nodenum we have to
- use TRIE_NODENUM() to convert.
-
- */
- DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log,
- "%*sCompiling trie using table compiler\n",
- (int)depth * 2 + 2, ""));
-
- trie->trans = (reg_trie_trans *)
- PerlMemShared_calloc( ( TRIE_CHARCOUNT(trie) + 1 )
- * trie->uniquecharcount + 1,
- sizeof(reg_trie_trans) );
- trie->states = (reg_trie_state *)
- PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2,
- sizeof(reg_trie_state) );
- next_alloc = trie->uniquecharcount + 1;
-
-
- for ( cur = first ; cur < last ; cur = regnext( cur ) ) {
-
- regnode * const noper = NEXTOPER( cur );
- const U8 *uc = (U8*)STRING( noper );
- const U8 * const e = uc + STR_LEN( noper );
-
- U32 state = 1; /* required init */
-
- U16 charid = 0; /* sanity init */
- U32 accept_state = 0; /* sanity init */
- U8 *scan = (U8*)NULL; /* sanity init */
-
- STRLEN foldlen = 0; /* required init */
- U32 wordlen = 0; /* required init */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- if ( OP(noper) != NOTHING ) {
- for ( ; uc < e ; uc += len ) {
-
- TRIE_READ_CHAR;
-
- if ( uvc < 256 ) {
- charid = trie->charmap[ uvc ];
- } else {
- SV* const * const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0);
- charid = svpp ? (U16)SvIV(*svpp) : 0;
- }
- if ( charid ) {
- charid--;
- if ( !trie->trans[ state + charid ].next ) {
- trie->trans[ state + charid ].next = next_alloc;
- trie->trans[ state ].check++;
- next_alloc += trie->uniquecharcount;
- }
- state = trie->trans[ state + charid ].next;
- } else {
- Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc );
- }
- /* charid is now 0 if we dont know the char read, or nonzero if we do */
- }
- }
- accept_state = TRIE_NODENUM( state );
- TRIE_HANDLE_WORD(accept_state);
-
- } /* end second pass */
-
- /* and now dump it out before we compress it */
- DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_table(trie, widecharmap,
- revcharmap,
- next_alloc, depth+1));
-
- {
- /*
- * Inplace compress the table.*
-
- For sparse data sets the table constructed by the trie algorithm will
- be mostly 0/FAIL transitions or to put it another way mostly empty.
- (Note that leaf nodes will not contain any transitions.)
-
- This algorithm compresses the tables by eliminating most such
- transitions, at the cost of a modest bit of extra work during lookup:
-
- - Each states[] entry contains a .base field which indicates the
- index in the state[] array wheres its transition data is stored.
-
- - If .base is 0 there are no valid transitions from that node.
-
- - If .base is nonzero then charid is added to it to find an entry in
- the trans array.
-
- -If trans[states[state].base+charid].check!=state then the
- transition is taken to be a 0/Fail transition. Thus if there are fail
- transitions at the front of the node then the .base offset will point
- somewhere inside the previous nodes data (or maybe even into a node
- even earlier), but the .check field determines if the transition is
- valid.
-
- XXX - wrong maybe?
- The following process inplace converts the table to the compressed
- table: We first do not compress the root node 1,and mark its all its
- .check pointers as 1 and set its .base pointer as 1 as well. This
- allows to do a DFA construction from the compressed table later, and
- ensures that any .base pointers we calculate later are greater than
- 0.
-
- - We set 'pos' to indicate the first entry of the second node.
-
- - We then iterate over the columns of the node, finding the first and
- last used entry at l and m. We then copy l..m into pos..(pos+m-l),
- and set the .check pointers accordingly, and advance pos
- appropriately and repreat for the next node. Note that when we copy
- the next pointers we have to convert them from the original
- NODEIDX form to NODENUM form as the former is not valid post
- compression.
-
- - If a node has no transitions used we mark its base as 0 and do not
- advance the pos pointer.
-
- - If a node only has one transition we use a second pointer into the
- structure to fill in allocated fail transitions from other states.
- This pointer is independent of the main pointer and scans forward
- looking for null transitions that are allocated to a state. When it
- finds one it writes the single transition into the "hole". If the
- pointer doesnt find one the single transition is appended as normal.
-
- - Once compressed we can Renew/realloc the structures to release the
- excess space.
-
- See "Table-Compression Methods" in sec 3.9 of the Red Dragon,
- specifically Fig 3.47 and the associated pseudocode.
-
- demq
- */
- const U32 laststate = TRIE_NODENUM( next_alloc );
- U32 state, charid;
- U32 pos = 0, zp=0;
- trie->statecount = laststate;
-
- for ( state = 1 ; state < laststate ; state++ ) {
- U8 flag = 0;
- const U32 stateidx = TRIE_NODEIDX( state );
- const U32 o_used = trie->trans[ stateidx ].check;
- U32 used = trie->trans[ stateidx ].check;
- trie->trans[ stateidx ].check = 0;
-
- for ( charid = 0 ; used && charid < trie->uniquecharcount ; charid++ ) {
- if ( flag || trie->trans[ stateidx + charid ].next ) {
- if ( trie->trans[ stateidx + charid ].next ) {
- if (o_used == 1) {
- for ( ; zp < pos ; zp++ ) {
- if ( ! trie->trans[ zp ].next ) {
- break;
- }
- }
- trie->states[ state ].trans.base = zp + trie->uniquecharcount - charid ;
- trie->trans[ zp ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ zp ].check = state;
- if ( ++zp > pos ) pos = zp;
- break;
- }
- used--;
- }
- if ( !flag ) {
- flag = 1;
- trie->states[ state ].trans.base = pos + trie->uniquecharcount - charid ;
- }
- trie->trans[ pos ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next );
- trie->trans[ pos ].check = state;
- pos++;
- }
- }
- }
- trie->lasttrans = pos + 1;
- trie->states = (reg_trie_state *)
- PerlMemShared_realloc( trie->states, laststate
- * sizeof(reg_trie_state) );
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf( Perl_debug_log,
- "%*sAlloc: %d Orig: %"IVdf" elements, Final:%"IVdf". Savings of %%%5.2f\n",
- (int)depth * 2 + 2,"",
- (int)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1 ),
- (IV)next_alloc,
- (IV)pos,
- ( ( next_alloc - pos ) * 100 ) / (double)next_alloc );
- );
-
- } /* end table compress */
- }
- DEBUG_TRIE_COMPILE_MORE_r(
- PerlIO_printf(Perl_debug_log, "%*sStatecount:%"UVxf" Lasttrans:%"UVxf"\n",
- (int)depth * 2 + 2, "",
- (UV)trie->statecount,
- (UV)trie->lasttrans)
- );
- /* resize the trans array to remove unused space */
- trie->trans = (reg_trie_trans *)
- PerlMemShared_realloc( trie->trans, trie->lasttrans
- * sizeof(reg_trie_trans) );
-
- /* and now dump out the compressed format */
- DEBUG_TRIE_COMPILE_r(dump_trie(trie, widecharmap, revcharmap, depth+1));
-
- { /* Modify the program and insert the new TRIE node*/
- U8 nodetype =(U8)(flags & 0xFF);
- char *str=NULL;
-
-#ifdef DEBUGGING
- regnode *optimize = NULL;
-#ifdef RE_TRACK_PATTERN_OFFSETS
-
- U32 mjd_offset = 0;
- U32 mjd_nodelen = 0;
-#endif /* RE_TRACK_PATTERN_OFFSETS */
-#endif /* DEBUGGING */
- /*
- This means we convert either the first branch or the first Exact,
- depending on whether the thing following (in 'last') is a branch
- or not and whther first is the startbranch (ie is it a sub part of
- the alternation or is it the whole thing.)
- Assuming its a sub part we conver the EXACT otherwise we convert
- the whole branch sequence, including the first.
- */
- /* Find the node we are going to overwrite */
- if ( first != startbranch || OP( last ) == BRANCH ) {
- /* branch sub-chain */
- NEXT_OFF( first ) = (U16)(last - first);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_r({
- mjd_offset= Node_Offset((convert));
- mjd_nodelen= Node_Length((convert));
- });
-#endif
- /* whole branch chain */
- }
-#ifdef RE_TRACK_PATTERN_OFFSETS
- else {
- DEBUG_r({
- const regnode *nop = NEXTOPER( convert );
- mjd_offset= Node_Offset((nop));
- mjd_nodelen= Node_Length((nop));
- });
- }
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%*sMJD offset:%"UVuf" MJD length:%"UVuf"\n",
- (int)depth * 2 + 2, "",
- (UV)mjd_offset, (UV)mjd_nodelen)
- );
-#endif
- /* But first we check to see if there is a common prefix we can
- split out as an EXACT and put in front of the TRIE node. */
- trie->startstate= 1;
- if ( trie->bitmap && !widecharmap && !trie->jump ) {
- U32 state;
- for ( state = 1 ; state < trie->statecount-1 ; state++ ) {
- U32 ofs = 0;
- I32 idx = -1;
- U32 count = 0;
- const U32 base = trie->states[ state ].trans.base;
-
- if ( trie->states[state].wordnum )
- count = 1;
-
- for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) {
- if ( ( base + ofs >= trie->uniquecharcount ) &&
- ( base + ofs - trie->uniquecharcount < trie->lasttrans ) &&
- trie->trans[ base + ofs - trie->uniquecharcount ].check == state )
- {
- if ( ++count > 1 ) {
- SV **tmp = av_fetch( revcharmap, ofs, 0);
- const U8 *ch = (U8*)SvPV_nolen_const( *tmp );
- if ( state == 1 ) break;
- if ( count == 2 ) {
- Zero(trie->bitmap, ANYOF_BITMAP_SIZE, char);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*sNew Start State=%"UVuf" Class: [",
- (int)depth * 2 + 2, "",
- (UV)state));
- if (idx >= 0) {
- SV ** const tmp = av_fetch( revcharmap, idx, 0);
- const U8 * const ch = (U8*)SvPV_nolen_const( *tmp );
-
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie, folder[ *ch ]);
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log, "%s", (char*)ch)
- );
- }
- }
- TRIE_BITMAP_SET(trie,*ch);
- if ( folder )
- TRIE_BITMAP_SET(trie,folder[ *ch ]);
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"%s", ch));
- }
- idx = ofs;
- }
- }
- if ( count == 1 ) {
- SV **tmp = av_fetch( revcharmap, idx, 0);
- STRLEN len;
- char *ch = SvPV( *tmp, len );
- DEBUG_OPTIMISE_r({
- SV *sv=sv_newmortal();
- PerlIO_printf( Perl_debug_log,
- "%*sPrefix State: %"UVuf" Idx:%"UVuf" Char='%s'\n",
- (int)depth * 2 + 2, "",
- (UV)state, (UV)idx,
- pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 6,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_ESCAPE_FIRSTCHAR
- )
- );
- });
- if ( state==1 ) {
- OP( convert ) = nodetype;
- str=STRING(convert);
- STR_LEN(convert)=0;
- }
- STR_LEN(convert) += len;
- while (len--)
- *str++ = *ch++;
- } else {
-#ifdef DEBUGGING
- if (state>1)
- DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"]\n"));
-#endif
- break;
- }
- }
- if (str) {
- regnode *n = convert+NODE_SZ_STR(convert);
- NEXT_OFF(convert) = NODE_SZ_STR(convert);
- trie->startstate = state;
- trie->minlen -= (state - 1);
- trie->maxlen -= (state - 1);
-#ifdef DEBUGGING
- /* At least the UNICOS C compiler choked on this
- * being argument to DEBUG_r(), so let's just have
- * it right here. */
- if (
-#ifdef PERL_EXT_RE_BUILD
- 1
-#else
- DEBUG_r_TEST
-#endif
- ) {
- regnode *fix = convert;
- U32 word = trie->wordcount;
- mjd_nodelen++;
- Set_Node_Offset_Length(convert, mjd_offset, state - 1);
- while( ++fix < n ) {
- Set_Node_Offset_Length(fix, 0, 0);
- }
- while (word--) {
- SV ** const tmp = av_fetch( trie_words, word, 0 );
- if (tmp) {
- if ( STR_LEN(convert) <= SvCUR(*tmp) )
- sv_chop(*tmp, SvPV_nolen(*tmp) + STR_LEN(convert));
- else
- sv_chop(*tmp, SvPV_nolen(*tmp) + SvCUR(*tmp));
- }
- }
- }
-#endif
- if (trie->maxlen) {
- convert = n;
- } else {
- NEXT_OFF(convert) = (U16)(tail - convert);
- DEBUG_r(optimize= n);
- }
- }
- }
- if (!jumper)
- jumper = last;
- if ( trie->maxlen ) {
- NEXT_OFF( convert ) = (U16)(tail - convert);
- ARG_SET( convert, data_slot );
- /* Store the offset to the first unabsorbed branch in
- jump[0], which is otherwise unused by the jump logic.
- We use this when dumping a trie and during optimisation. */
- if (trie->jump)
- trie->jump[0] = (U16)(nextbranch - convert);
-
- /* XXXX */
- if ( !trie->states[trie->startstate].wordnum && trie->bitmap &&
- ( (char *)jumper - (char *)convert) >= (int)sizeof(struct regnode_charclass) )
- {
- OP( convert ) = TRIEC;
- Copy(trie->bitmap, ((struct regnode_charclass *)convert)->bitmap, ANYOF_BITMAP_SIZE, char);
- PerlMemShared_free(trie->bitmap);
- trie->bitmap= NULL;
- } else
- OP( convert ) = TRIE;
-
- /* store the type in the flags */
- convert->flags = nodetype;
- DEBUG_r({
- optimize = convert
- + NODE_STEP_REGNODE
- + regarglen[ OP( convert ) ];
- });
- /* XXX We really should free up the resource in trie now,
- as we won't use them - (which resources?) dmq */
- }
- /* needed for dumping*/
- DEBUG_r(if (optimize) {
- regnode *opt = convert;
-
- while ( ++opt < optimize) {
- Set_Node_Offset_Length(opt,0,0);
- }
- /*
- Try to clean up some of the debris left after the
- optimisation.
- */
- while( optimize < jumper ) {
- mjd_nodelen += Node_Length((optimize));
- OP( optimize ) = OPTIMIZED;
- Set_Node_Offset_Length(optimize,0,0);
- optimize++;
- }
- Set_Node_Offset_Length(convert,mjd_offset,mjd_nodelen);
- });
- } /* end node insert */
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, convert);
- RExC_rxi->data->data[ data_slot + 1 ] = (void*)widecharmap;
-#ifdef DEBUGGING
- RExC_rxi->data->data[ data_slot + TRIE_WORDS_OFFSET ] = (void*)trie_words;
- RExC_rxi->data->data[ data_slot + 3 ] = (void*)revcharmap;
-#else
- SvREFCNT_dec(revcharmap);
-#endif
- return trie->jump
- ? MADE_JUMP_TRIE
- : trie->startstate>1
- ? MADE_EXACT_TRIE
- : MADE_TRIE;
-}
-
-STATIC void
-S_make_trie_failtable(pTHX_ RExC_state_t *pRExC_state, regnode *source, regnode *stclass, U32 depth)
-{
-/* The Trie is constructed and compressed now so we can build a fail array now if its needed
-
- This is basically the Aho-Corasick algorithm. Its from exercise 3.31 and 3.32 in the
- "Red Dragon" -- Compilers, principles, techniques, and tools. Aho, Sethi, Ullman 1985/88
- ISBN 0-201-10088-6
-
- We find the fail state for each state in the trie, this state is the longest proper
- suffix of the current states 'word' that is also a proper prefix of another word in our
- trie. State 1 represents the word '' and is the thus the default fail state. This allows
- the DFA not to have to restart after its tried and failed a word at a given point, it
- simply continues as though it had been matching the other word in the first place.
- Consider
- 'abcdgu'=~/abcdefg|cdgu/
- When we get to 'd' we are still matching the first word, we would encounter 'g' which would
- fail, which would bring use to the state representing 'd' in the second word where we would
- try 'g' and succeed, prodceding to match 'cdgu'.
- */
- /* add a fail transition */
- const U32 trie_offset = ARG(source);
- reg_trie_data *trie=(reg_trie_data *)RExC_rxi->data->data[trie_offset];
- U32 *q;
- const U32 ucharcount = trie->uniquecharcount;
- const U32 numstates = trie->statecount;
- const U32 ubound = trie->lasttrans + ucharcount;
- U32 q_read = 0;
- U32 q_write = 0;
- U32 charid;
- U32 base = trie->states[ 1 ].trans.base;
- U32 *fail;
- reg_ac_data *aho;
- const U32 data_slot = add_data( pRExC_state, 1, "T" );
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_MAKE_TRIE_FAILTABLE;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
-
- ARG_SET( stclass, data_slot );
- aho = (reg_ac_data *) PerlMemShared_calloc( 1, sizeof(reg_ac_data) );
- RExC_rxi->data->data[ data_slot ] = (void*)aho;
- aho->trie=trie_offset;
- aho->states=(reg_trie_state *)PerlMemShared_malloc( numstates * sizeof(reg_trie_state) );
- Copy( trie->states, aho->states, numstates, reg_trie_state );
- Newxz( q, numstates, U32);
- aho->fail = (U32 *) PerlMemShared_calloc( numstates, sizeof(U32) );
- aho->refcount = 1;
- fail = aho->fail;
- /* initialize fail[0..1] to be 1 so that we always have
- a valid final fail state */
- fail[ 0 ] = fail[ 1 ] = 1;
-
- for ( charid = 0; charid < ucharcount ; charid++ ) {
- const U32 newstate = TRIE_TRANS_STATE( 1, base, ucharcount, charid, 0 );
- if ( newstate ) {
- q[ q_write ] = newstate;
- /* set to point at the root */
- fail[ q[ q_write++ ] ]=1;
- }
- }
- while ( q_read < q_write) {
- const U32 cur = q[ q_read++ % numstates ];
- base = trie->states[ cur ].trans.base;
-
- for ( charid = 0 ; charid < ucharcount ; charid++ ) {
- const U32 ch_state = TRIE_TRANS_STATE( cur, base, ucharcount, charid, 1 );
- if (ch_state) {
- U32 fail_state = cur;
- U32 fail_base;
- do {
- fail_state = fail[ fail_state ];
- fail_base = aho->states[ fail_state ].trans.base;
- } while ( !TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ) );
-
- fail_state = TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 );
- fail[ ch_state ] = fail_state;
- if ( !aho->states[ ch_state ].wordnum && aho->states[ fail_state ].wordnum )
- {
- aho->states[ ch_state ].wordnum = aho->states[ fail_state ].wordnum;
- }
- q[ q_write++ % numstates] = ch_state;
- }
- }
- }
- /* restore fail[0..1] to 0 so that we "fall out" of the AC loop
- when we fail in state 1, this allows us to use the
- charclass scan to find a valid start char. This is based on the principle
- that theres a good chance the string being searched contains lots of stuff
- that cant be a start char.
- */
- fail[ 0 ] = fail[ 1 ] = 0;
- DEBUG_TRIE_COMPILE_r({
- PerlIO_printf(Perl_debug_log,
- "%*sStclass Failtable (%"UVuf" states): 0",
- (int)(depth * 2), "", (UV)numstates
- );
- for( q_read=1; q_read<numstates; q_read++ ) {
- PerlIO_printf(Perl_debug_log, ", %"UVuf, (UV)fail[q_read]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
- Safefree(q);
- /*RExC_seen |= REG_SEEN_TRIEDFA;*/
-}
-
-
-/*
- * There are strange code-generation bugs caused on sparc64 by gcc-2.95.2.
- * These need to be revisited when a newer toolchain becomes available.
- */
-#if defined(__sparc64__) && defined(__GNUC__)
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
-# undef SPARC64_GCC_WORKAROUND
-# define SPARC64_GCC_WORKAROUND 1
-# endif
-#endif
-
-#define DEBUG_PEEP(str,scan,depth) \
- DEBUG_OPTIMISE_r({if (scan){ \
- SV * const mysv=sv_newmortal(); \
- regnode *Next = regnext(scan); \
- regprop(RExC_rx, mysv, scan); \
- PerlIO_printf(Perl_debug_log, "%*s" str ">%3d: %s (%d)\n", \
- (int)depth*2, "", REG_NODE_NUM(scan), SvPV_nolen_const(mysv),\
- Next ? (REG_NODE_NUM(Next)) : 0 ); \
- }});
-
-
-
-
-
-#define JOIN_EXACT(scan,min,flags) \
- if (PL_regkind[OP(scan)] == EXACT) \
- join_exact(pRExC_state,(scan),(min),(flags),NULL,depth+1)
-
-STATIC U32
-S_join_exact(pTHX_ RExC_state_t *pRExC_state, regnode *scan, I32 *min, U32 flags,regnode *val, U32 depth) {
- /* Merge several consecutive EXACTish nodes into one. */
- regnode *n = regnext(scan);
- U32 stringok = 1;
- regnode *next = scan + NODE_SZ_STR(scan);
- U32 merged = 0;
- U32 stopnow = 0;
-#ifdef DEBUGGING
- regnode *stop = scan;
- GET_RE_DEBUG_FLAGS_DECL;
-#else
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_JOIN_EXACT;
-#ifndef EXPERIMENTAL_INPLACESCAN
- PERL_UNUSED_ARG(flags);
- PERL_UNUSED_ARG(val);
-#endif
- DEBUG_PEEP("join",scan,depth);
-
- /* Skip NOTHING, merge EXACT*. */
- while (n &&
- ( PL_regkind[OP(n)] == NOTHING ||
- (stringok && (OP(n) == OP(scan))))
- && NEXT_OFF(n)
- && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) {
-
- if (OP(n) == TAIL || n > next)
- stringok = 0;
- if (PL_regkind[OP(n)] == NOTHING) {
- DEBUG_PEEP("skip:",n,depth);
- NEXT_OFF(scan) += NEXT_OFF(n);
- next = n + NODE_STEP_REGNODE;
-#ifdef DEBUGGING
- if (stringok)
- stop = n;
-#endif
- n = regnext(n);
- }
- else if (stringok) {
- const unsigned int oldl = STR_LEN(scan);
- regnode * const nnext = regnext(n);
-
- DEBUG_PEEP("merg",n,depth);
-
- merged++;
- if (oldl + STR_LEN(n) > U8_MAX)
- break;
- NEXT_OFF(scan) += NEXT_OFF(n);
- STR_LEN(scan) += STR_LEN(n);
- next = n + NODE_SZ_STR(n);
- /* Now we can overwrite *n : */
- Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char);
-#ifdef DEBUGGING
- stop = next - 1;
-#endif
- n = nnext;
- if (stopnow) break;
- }
-
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (flags && !NEXT_OFF(n)) {
- DEBUG_PEEP("atch", val, depth);
- if (reg_off_by_arg[OP(n)]) {
- ARG_SET(n, val - n);
- }
- else {
- NEXT_OFF(n) = val - n;
- }
- stopnow = 1;
- }
-#endif
- }
-
- if (UTF && ( OP(scan) == EXACTF ) && ( STR_LEN(scan) >= 6 ) ) {
- /*
- Two problematic code points in Unicode casefolding of EXACT nodes:
-
- U+0390 - GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS
- U+03B0 - GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS
-
- which casefold to
-
- Unicode UTF-8
-
- U+03B9 U+0308 U+0301 0xCE 0xB9 0xCC 0x88 0xCC 0x81
- U+03C5 U+0308 U+0301 0xCF 0x85 0xCC 0x88 0xCC 0x81
-
- This means that in case-insensitive matching (or "loose matching",
- as Unicode calls it), an EXACTF of length six (the UTF-8 encoded byte
- length of the above casefolded versions) can match a target string
- of length two (the byte length of UTF-8 encoded U+0390 or U+03B0).
- This would rather mess up the minimum length computation.
-
- What we'll do is to look for the tail four bytes, and then peek
- at the preceding two bytes to see whether we need to decrease
- the minimum length by four (six minus two).
-
- Thanks to the design of UTF-8, there cannot be false matches:
- A sequence of valid UTF-8 bytes cannot be a subsequence of
- another valid sequence of UTF-8 bytes.
-
- */
- char * const s0 = STRING(scan), *s, *t;
- char * const s1 = s0 + STR_LEN(scan) - 1;
- char * const s2 = s1 - 4;
-#ifdef EBCDIC /* RD tunifold greek 0390 and 03B0 */
- const char t0[] = "\xaf\x49\xaf\x42";
-#else
- const char t0[] = "\xcc\x88\xcc\x81";
-#endif
- const char * const t1 = t0 + 3;
-
- for (s = s0 + 2;
- s < s2 && (t = ninstr(s, s1, t0, t1));
- s = t + 4) {
-#ifdef EBCDIC
- if (((U8)t[-1] == 0x68 && (U8)t[-2] == 0xB4) ||
- ((U8)t[-1] == 0x46 && (U8)t[-2] == 0xB5))
-#else
- if (((U8)t[-1] == 0xB9 && (U8)t[-2] == 0xCE) ||
- ((U8)t[-1] == 0x85 && (U8)t[-2] == 0xCF))
-#endif
- *min -= 4;
- }
- }
-
-#ifdef DEBUGGING
- /* Allow dumping */
- n = scan + NODE_SZ_STR(scan);
- while (n <= stop) {
- if (PL_regkind[OP(n)] != NOTHING || OP(n) == NOTHING) {
- OP(n) = OPTIMIZED;
- NEXT_OFF(n) = 0;
- }
- n++;
- }
-#endif
- DEBUG_OPTIMISE_r(if (merged){DEBUG_PEEP("finl",scan,depth)});
- return stopnow;
-}
-
-/* REx optimizer. Converts nodes into quickier variants "in place".
- Finds fixed substrings. */
-
-/* Stops at toplevel WHILEM as well as at "last". At end *scanp is set
- to the position after last scanned or to NULL. */
-
-#define INIT_AND_WITHP \
- assert(!and_withp); \
- Newx(and_withp,1,struct regnode_charclass_class); \
- SAVEFREEPV(and_withp)
-
-/* this is a chain of data about sub patterns we are processing that
- need to be handled seperately/specially in study_chunk. Its so
- we can simulate recursion without losing state. */
-struct scan_frame;
-typedef struct scan_frame {
- regnode *last; /* last node to process in this frame */
- regnode *next; /* next node to process when last is reached */
- struct scan_frame *prev; /*previous frame*/
- I32 stop; /* what stopparen do we use */
-} scan_frame;
-
-
-#define SCAN_COMMIT(s, data, m) scan_commit(s, data, m, is_inf)
-
-#define CASE_SYNST_FNC(nAmE) \
-case nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break; \
-case N ## nAmE: \
- if (flags & SCF_DO_STCLASS_AND) { \
- for (value = 0; value < 256; value++) \
- if (is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_CLEAR(data->start_class, value); \
- } \
- else { \
- for (value = 0; value < 256; value++) \
- if (!is_ ## nAmE ## _cp(value)) \
- ANYOF_BITMAP_SET(data->start_class, value); \
- } \
- break
-
-
-
-STATIC I32
-S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp,
- I32 *minlenp, I32 *deltap,
- regnode *last,
- scan_data_t *data,
- I32 stopparen,
- U8* recursed,
- struct regnode_charclass_class *and_withp,
- U32 flags, U32 depth)
- /* scanp: Start here (read-write). */
- /* deltap: Write maxlen-minlen here. */
- /* last: Stop before this one. */
- /* data: string data about the pattern */
- /* stopparen: treat close N as END */
- /* recursed: which subroutines have we recursed into */
- /* and_withp: Valid if flags & SCF_DO_STCLASS_OR */
-{
- dVAR;
- I32 min = 0, pars = 0, code;
- regnode *scan = *scanp, *next;
- I32 delta = 0;
- int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF);
- int is_inf_internal = 0; /* The studied chunk is infinite */
- I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0;
- scan_data_t data_fake;
- SV *re_trie_maxbuff = NULL;
- regnode *first_non_open = scan;
- I32 stopmin = I32_MAX;
- scan_frame *frame = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_STUDY_CHUNK;
-
-#ifdef DEBUGGING
- StructCopy(&zero_scan_data, &data_fake, scan_data_t);
-#endif
-
- if ( depth == 0 ) {
- while (first_non_open && OP(first_non_open) == OPEN)
- first_non_open=regnext(first_non_open);
- }
-
-
- fake_study_recurse:
- while ( scan && OP(scan) != END && scan < last ){
- /* Peephole optimizer: */
- DEBUG_STUDYDATA("Peep:", data,depth);
- DEBUG_PEEP("Peep",scan,depth);
- JOIN_EXACT(scan,&min,0);
-
- /* Follow the next-chain of the current node and optimize
- away all the NOTHINGs from it. */
- if (OP(scan) != CURLYX) {
- const int max = (reg_off_by_arg[OP(scan)]
- ? I32_MAX
- /* I32 may be smaller than U16 on CRAYs! */
- : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX));
- int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan));
- int noff;
- regnode *n = scan;
-
- /* Skip NOTHING and LONGJMP. */
- while ((n = regnext(n))
- && ((PL_regkind[OP(n)] == NOTHING && (noff = NEXT_OFF(n)))
- || ((OP(n) == LONGJMP) && (noff = ARG(n))))
- && off + noff < max)
- off += noff;
- if (reg_off_by_arg[OP(scan)])
- ARG(scan) = off;
- else
- NEXT_OFF(scan) = off;
- }
-
-
-
- /* The principal pseudo-switch. Cannot be a switch, since we
- look into several different things. */
- if (OP(scan) == BRANCH || OP(scan) == BRANCHJ
- || OP(scan) == IFTHEN) {
- next = regnext(scan);
- code = OP(scan);
- /* demq: the op(next)==code check is to see if we have "branch-branch" AFAICT */
-
- if (OP(next) == code || code == IFTHEN) {
- /* NOTE - There is similar code to this block below for handling
- TRIE nodes on a re-study. If you change stuff here check there
- too. */
- I32 max1 = 0, min1 = I32_MAX, num = 0;
- struct regnode_charclass_class accum;
- regnode * const startbranch=scan;
-
- if (flags & SCF_DO_SUBSTR)
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- while (OP(scan) == code) {
- I32 deltanext, minnext, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- num++;
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
-
- data_fake.pos_delta = delta;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- if (code != BRANCH)
- scan = NEXTOPER(scan);
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- /* we suppose the run is continuous, last=next...*/
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- next, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- if (min1 > minnext)
- min1 = minnext;
- if (max1 < minnext + deltanext)
- max1 = minnext + deltanext;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
- scan = next;
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > minnext)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- if (code == IFTHEN && num < 2) /* Empty ELSE branch */
- min1 = 0;
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
-
- if (PERL_ENABLE_TRIE_OPTIMISATION && OP( startbranch ) == BRANCH ) {
- /* demq.
-
- Assuming this was/is a branch we are dealing with: 'scan' now
- points at the item that follows the branch sequence, whatever
- it is. We now start at the beginning of the sequence and look
- for subsequences of
-
- BRANCH->EXACT=>x1
- BRANCH->EXACT=>x2
- tail
-
- which would be constructed from a pattern like /A|LIST|OF|WORDS/
-
- If we can find such a subseqence we need to turn the first
- element into a trie and then add the subsequent branch exact
- strings to the trie.
-
- We have two cases
-
- 1. patterns where the whole set of branch can be converted.
-
- 2. patterns where only a subset can be converted.
-
- In case 1 we can replace the whole set with a single regop
- for the trie. In case 2 we need to keep the start and end
- branchs so
-
- 'BRANCH EXACT; BRANCH EXACT; BRANCH X'
- becomes BRANCH TRIE; BRANCH X;
-
- There is an additional case, that being where there is a
- common prefix, which gets split out into an EXACT like node
- preceding the TRIE node.
-
- If x(1..n)==tail then we can do a simple trie, if not we make
- a "jump" trie, such that when we match the appropriate word
- we "jump" to the appopriate tail node. Essentailly we turn
- a nested if into a case structure of sorts.
-
- */
-
- int made=0;
- if (!re_trie_maxbuff) {
- re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1);
- if (!SvIOK(re_trie_maxbuff))
- sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT);
- }
- if ( SvIV(re_trie_maxbuff)>=0 ) {
- regnode *cur;
- regnode *first = (regnode *)NULL;
- regnode *last = (regnode *)NULL;
- regnode *tail = scan;
- U8 optype = 0;
- U32 count=0;
-
-#ifdef DEBUGGING
- SV * const mysv = sv_newmortal(); /* for dumping */
-#endif
- /* var tail is used because there may be a TAIL
- regop in the way. Ie, the exacts will point to the
- thing following the TAIL, but the last branch will
- point at the TAIL. So we advance tail. If we
- have nested (?:) we may have to move through several
- tails.
- */
-
- while ( OP( tail ) == TAIL ) {
- /* this is the TAIL generated by (?:) */
- tail = regnext( tail );
- }
-
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, tail );
- PerlIO_printf( Perl_debug_log, "%*s%s%s\n",
- (int)depth * 2 + 2, "",
- "Looking for TRIE'able sequences. Tail node is: ",
- SvPV_nolen_const( mysv )
- );
- });
-
- /*
-
- step through the branches, cur represents each
- branch, noper is the first thing to be matched
- as part of that branch and noper_next is the
- regnext() of that node. if noper is an EXACT
- and noper_next is the same as scan (our current
- position in the regex) then the EXACT branch is
- a possible optimization target. Once we have
- two or more consequetive such branches we can
- create a trie of the EXACT's contents and stich
- it in place. If the sequence represents all of
- the branches we eliminate the whole thing and
- replace it with a single TRIE. If it is a
- subsequence then we need to stitch it in. This
- means the first branch has to remain, and needs
- to be repointed at the item on the branch chain
- following the last branch optimized. This could
- be either a BRANCH, in which case the
- subsequence is internal, or it could be the
- item following the branch sequence in which
- case the subsequence is at the end.
-
- */
-
- /* dont use tail as the end marker for this traverse */
- for ( cur = startbranch ; cur != scan ; cur = regnext( cur ) ) {
- regnode * const noper = NEXTOPER( cur );
-#if defined(DEBUGGING) || defined(NOJUMPTRIE)
- regnode * const noper_next = regnext( noper );
-#endif
-
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log, "%*s- %s (%d)",
- (int)depth * 2 + 2,"", SvPV_nolen_const( mysv ), REG_NODE_NUM(cur) );
-
- regprop(RExC_rx, mysv, noper);
- PerlIO_printf( Perl_debug_log, " -> %s",
- SvPV_nolen_const(mysv));
-
- if ( noper_next ) {
- regprop(RExC_rx, mysv, noper_next );
- PerlIO_printf( Perl_debug_log,"\t=> %s\t",
- SvPV_nolen_const(mysv));
- }
- PerlIO_printf( Perl_debug_log, "(First==%d,Last==%d,Cur==%d)\n",
- REG_NODE_NUM(first), REG_NODE_NUM(last), REG_NODE_NUM(cur) );
- });
- if ( (((first && optype!=NOTHING) ? OP( noper ) == optype
- : PL_regkind[ OP( noper ) ] == EXACT )
- || OP(noper) == NOTHING )
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- && count < U16_MAX)
- {
- count++;
- if ( !first || optype == NOTHING ) {
- if (!first) first = cur;
- optype = OP( noper );
- } else {
- last = cur;
- }
- } else {
-/*
- Currently we do not believe that the trie logic can
- handle case insensitive matching properly when the
- pattern is not unicode (thus forcing unicode semantics).
-
- If/when this is fixed the following define can be swapped
- in below to fully enable trie logic.
-
-#define TRIE_TYPE_IS_SAFE 1
-
-*/
-#define TRIE_TYPE_IS_SAFE (UTF || optype==EXACT)
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- make_trie( pRExC_state,
- startbranch, first, cur, tail, count,
- optype, depth+1 );
- }
- if ( PL_regkind[ OP( noper ) ] == EXACT
-#ifdef NOJUMPTRIE
- && noper_next == tail
-#endif
- ){
- count = 1;
- first = cur;
- optype = OP( noper );
- } else {
- count = 0;
- first = NULL;
- optype = 0;
- }
- last = NULL;
- }
- }
- DEBUG_OPTIMISE_r({
- regprop(RExC_rx, mysv, cur);
- PerlIO_printf( Perl_debug_log,
- "%*s- %s (%d) <SCAN FINISHED>\n", (int)depth * 2 + 2,
- "", SvPV_nolen_const( mysv ),REG_NODE_NUM(cur));
-
- });
-
- if ( last && TRIE_TYPE_IS_SAFE ) {
- made= make_trie( pRExC_state, startbranch, first, scan, tail, count, optype, depth+1 );
-#ifdef TRIE_STUDY_OPT
- if ( ((made == MADE_EXACT_TRIE &&
- startbranch == first)
- || ( first_non_open == first )) &&
- depth==0 ) {
- flags |= SCF_TRIE_RESTUDY;
- if ( startbranch == first
- && scan == tail )
- {
- RExC_seen &=~REG_TOP_LEVEL_BRANCHES;
- }
- }
-#endif
- }
- }
-
- } /* do trie */
-
- }
- else if ( code == BRANCHJ ) { /* single branch is optimized. */
- scan = NEXTOPER(NEXTOPER(scan));
- } else /* single branch is optimized. */
- scan = NEXTOPER(scan);
- continue;
- } else if (OP(scan) == SUSPEND || OP(scan) == GOSUB || OP(scan) == GOSTART) {
- scan_frame *newframe = NULL;
- I32 paren;
- regnode *start;
- regnode *end;
-
- if (OP(scan) != SUSPEND) {
- /* set the pointer */
- if (OP(scan) == GOSUB) {
- paren = ARG(scan);
- RExC_recurse[ARG2L(scan)] = scan;
- start = RExC_open_parens[paren-1];
- end = RExC_close_parens[paren-1];
- } else {
- paren = 0;
- start = RExC_rxi->program + 1;
- end = RExC_opend;
- }
- if (!recursed) {
- Newxz(recursed, (((RExC_npar)>>3) +1), U8);
- SAVEFREEPV(recursed);
- }
- if (!PAREN_TEST(recursed,paren+1)) {
- PAREN_SET(recursed,paren+1);
- Newx(newframe,1,scan_frame);
- } else {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- } else {
- Newx(newframe,1,scan_frame);
- paren = stopparen;
- start = scan+2;
- end = regnext(scan);
- }
- if (newframe) {
- assert(start);
- assert(end);
- SAVEFREEPV(newframe);
- newframe->next = regnext(scan);
- newframe->last = last;
- newframe->stop = stopparen;
- newframe->prev = frame;
-
- frame = newframe;
- scan = start;
- stopparen = paren;
- last = end;
-
- continue;
- }
- }
- else if (OP(scan) == EXACT) {
- I32 l = STR_LEN(scan);
- UV uc;
- if (UTF) {
- const U8 * const s = (U8*)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- } else {
- uc = *((U8*)STRING(scan));
- }
- min += l;
- if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */
- /* The code below prefers earlier match for fixed
- offset, later match for variable offset. */
- if (data->last_end == -1) { /* Update the start info. */
- data->last_start_min = data->pos_min;
- data->last_start_max = is_inf
- ? I32_MAX : data->pos_min + data->pos_delta;
- }
- sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan));
- if (UTF)
- SvUTF8_on(data->last_found);
- {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += utf8_length((U8*)STRING(scan),
- (U8*)STRING(scan)+STR_LEN(scan));
- }
- data->last_end = data->pos_min + l;
- data->pos_min += l; /* As in the first entry. */
- data->flags &= ~SF_BEFORE_EOL;
- }
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && (!(data->start_class->flags & ANYOF_FOLD)
- || !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- )
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- if (uc < 0x100)
- data->start_class->flags &= ~ANYOF_UNICODE_ALL;
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- /* false positive possible if the class is case-folded */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- else
- data->start_class->flags |= ANYOF_UNICODE_ALL;
- data->start_class->flags &= ~ANYOF_EOS;
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (PL_regkind[OP(scan)] == EXACT) { /* But OP != EXACT! */
- I32 l = STR_LEN(scan);
- UV uc = *((U8*)STRING(scan));
-
- /* Search for fixed substrings supports EXACT only. */
- if (flags & SCF_DO_SUBSTR) {
- assert(data);
- SCAN_COMMIT(pRExC_state, data, minlenp);
- }
- if (UTF) {
- const U8 * const s = (U8 *)STRING(scan);
- l = utf8_length(s, s + l);
- uc = utf8_to_uvchr(s, NULL);
- }
- min += l;
- if (flags & SCF_DO_SUBSTR)
- data->pos_min += l;
- if (flags & SCF_DO_STCLASS_AND) {
- /* Check whether it is compatible with what we know already! */
- int compat = 1;
-
- if (uc >= 0x100 ||
- (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
- && !ANYOF_BITMAP_TEST(data->start_class, uc)
- && !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
- compat = 0;
- ANYOF_CLASS_ZERO(data->start_class);
- ANYOF_BITMAP_ZERO(data->start_class);
- if (compat) {
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- data->start_class->flags |= ANYOF_FOLD;
- if (OP(scan) == EXACTFL)
- data->start_class->flags |= ANYOF_LOCALE;
- }
- }
- else if (flags & SCF_DO_STCLASS_OR) {
- if (data->start_class->flags & ANYOF_FOLD) {
- /* false positive possible if the class is case-folded.
- Assume that the locale settings are the same... */
- if (uc < 0x100)
- ANYOF_BITMAP_SET(data->start_class, uc);
- data->start_class->flags &= ~ANYOF_EOS;
- }
- cl_and(data->start_class, and_withp);
- }
- flags &= ~SCF_DO_STCLASS;
- }
- else if (strchr((const char*)PL_varies,OP(scan))) {
- I32 mincount, maxcount, minnext, deltanext, fl = 0;
- I32 f = flags, pos_before = 0;
- regnode * const oscan = scan;
- struct regnode_charclass_class this_class;
- struct regnode_charclass_class *oclass = NULL;
- I32 next_is_eval = 0;
-
- switch (PL_regkind[OP(scan)]) {
- case WHILEM: /* End of (?:...)* . */
- scan = NEXTOPER(scan);
- goto finish;
- case PLUS:
- if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) {
- next = NEXTOPER(scan);
- if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) {
- mincount = 1;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- }
- if (flags & SCF_DO_SUBSTR)
- data->pos_min++;
- min++;
- /* Fall through. */
- case STAR:
- if (flags & SCF_DO_STCLASS) {
- mincount = 0;
- maxcount = REG_INFTY;
- next = regnext(scan);
- scan = NEXTOPER(scan);
- goto do_curly;
- }
- is_inf = is_inf_internal = 1;
- scan = regnext(scan);
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot extend fixed substrings */
- data->longest = &(data->longest_float);
- }
- goto optimize_curly_tail;
- case CURLY:
- if (stopparen>0 && (OP(scan)==CURLYN || OP(scan)==CURLYM)
- && (scan->flags == stopparen))
- {
- mincount = 1;
- maxcount = 1;
- } else {
- mincount = ARG1(scan);
- maxcount = ARG2(scan);
- }
- next = regnext(scan);
- if (OP(scan) == CURLYX) {
- I32 lp = (data ? *(data->last_closep) : 0);
- scan->flags = ((lp <= (I32)U8_MAX) ? (U8)lp : U8_MAX);
- }
- scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- next_is_eval = (OP(scan) == EVAL);
- do_curly:
- if (flags & SCF_DO_SUBSTR) {
- if (mincount == 0) SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot extend fixed substrings */
- pos_before = data->pos_min;
- }
- if (data) {
- fl = data->flags;
- data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL);
- if (is_inf)
- data->flags |= SF_IS_INF;
- }
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- oclass = data->start_class;
- data->start_class = &this_class;
- f |= SCF_DO_STCLASS_AND;
- f &= ~SCF_DO_STCLASS_OR;
- }
- /* These are the cases when once a subexpression
- fails at a particular position, it cannot succeed
- even after backtracking at the enclosing scope.
-
- XXXX what if minimal match and we are at the
- initial run of {n,m}? */
- if ((mincount != maxcount - 1) && (maxcount != REG_INFTY))
- f &= ~SCF_WHILEM_VISITED_POS;
-
- /* This will finish on WHILEM, setting scan, or on NULL: */
- minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext,
- last, data, stopparen, recursed, NULL,
- (mincount == 0
- ? (f & ~SCF_DO_SUBSTR) : f),depth+1);
-
- if (flags & SCF_DO_STCLASS)
- data->start_class = oclass;
- if (mincount == 0 || minnext == 0) {
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&this_class, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- } else { /* Non-zero len */
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &this_class);
- cl_and(data->start_class, and_withp);
- }
- else if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class, &this_class);
- flags &= ~SCF_DO_STCLASS;
- }
- if (!scan) /* It was not CURLYX, but CURLY. */
- scan = next;
- if ( /* ? quantifier ok, except for (?{ ... }) */
- (next_is_eval || !(mincount == 0 && maxcount == 1))
- && (minnext == 0) && (deltanext == 0)
- && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR))
- && maxcount <= REG_INFTY/3) /* Complement check for big count */
- {
- ckWARNreg(RExC_parse,
- "Quantifier unexpected on zero-length expression");
- }
-
- min += minnext * mincount;
- is_inf_internal |= ((maxcount == REG_INFTY
- && (minnext + deltanext) > 0)
- || deltanext == I32_MAX);
- is_inf |= is_inf_internal;
- delta += (minnext + deltanext) * maxcount - minnext * mincount;
-
- /* Try powerful optimization CURLYX => CURLYN. */
- if ( OP(oscan) == CURLYX && data
- && data->flags & SF_IN_PAR
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext && minnext == 1 ) {
- /* Try to optimize to CURLYN. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS;
- regnode * const nxt1 = nxt;
-#ifdef DEBUGGING
- regnode *nxt2;
-#endif
-
- /* Skip open. */
- nxt = regnext(nxt);
- if (!strchr((const char*)PL_simple,OP(nxt))
- && !(PL_regkind[OP(nxt)] == EXACT
- && STR_LEN(nxt) == 1))
- goto nogo;
-#ifdef DEBUGGING
- nxt2 = nxt;
-#endif
- nxt = regnext(nxt);
- if (OP(nxt) != CLOSE)
- goto nogo;
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt+2; /*close->while*/
- }
- /* Now we know that nxt2 is the only contents: */
- oscan->flags = (U8)ARG(nxt);
- OP(oscan) = CURLYN;
- OP(nxt1) = NOTHING; /* was OPEN. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */
-#endif
- }
- nogo:
-
- /* Try optimization CURLYX => CURLYM. */
- if ( OP(oscan) == CURLYX && data
- && !(data->flags & SF_HAS_PAR)
- && !(data->flags & SF_HAS_EVAL)
- && !deltanext /* atom is fixed width */
- && minnext != 0 /* CURLYM can't handle zero width */
- ) {
- /* XXXX How to optimize if data == 0? */
- /* Optimize to a simpler form. */
- regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */
- regnode *nxt2;
-
- OP(oscan) = CURLYM;
- while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/
- && (OP(nxt2) != WHILEM))
- nxt = nxt2;
- OP(nxt2) = SUCCEED; /* Whas WHILEM */
- /* Need to optimize away parenths. */
- if (data->flags & SF_IN_PAR) {
- /* Set the parenth number. */
- regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/
-
- if (OP(nxt) != CLOSE)
- FAIL("Panic opt close");
- oscan->flags = (U8)ARG(nxt);
- if (RExC_open_parens) {
- RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/
- RExC_close_parens[ARG(nxt1)-1]=nxt2+1; /*close->NOTHING*/
- }
- OP(nxt1) = OPTIMIZED; /* was OPEN. */
- OP(nxt) = OPTIMIZED; /* was CLOSE. */
-
-#ifdef DEBUGGING
- OP(nxt1 + 1) = OPTIMIZED; /* was count. */
- OP(nxt + 1) = OPTIMIZED; /* was count. */
- NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */
- NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */
-#endif
-#if 0
- while ( nxt1 && (OP(nxt1) != WHILEM)) {
- regnode *nnxt = regnext(nxt1);
-
- if (nnxt == nxt) {
- if (reg_off_by_arg[OP(nxt1)])
- ARG_SET(nxt1, nxt2 - nxt1);
- else if (nxt2 - nxt1 < U16_MAX)
- NEXT_OFF(nxt1) = nxt2 - nxt1;
- else
- OP(nxt) = NOTHING; /* Cannot beautify */
- }
- nxt1 = nnxt;
- }
-#endif
- /* Optimize again: */
- study_chunk(pRExC_state, &nxt1, minlenp, &deltanext, nxt,
- NULL, stopparen, recursed, NULL, 0,depth+1);
- }
- else
- oscan->flags = 0;
- }
- else if ((OP(oscan) == CURLYX)
- && (flags & SCF_WHILEM_VISITED_POS)
- /* See the comment on a similar expression above.
- However, this time it not a subexpression
- we care about, but the expression itself. */
- && (maxcount == REG_INFTY)
- && data && ++data->whilem_c < 16) {
- /* This stays as CURLYX, we can put the count/of pair. */
- /* Find WHILEM (as in regexec.c) */
- regnode *nxt = oscan + NEXT_OFF(oscan);
-
- if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */
- nxt += ARG(nxt);
- PREVOPER(nxt)->flags = (U8)(data->whilem_c
- | (RExC_whilem_seen << 4)); /* On WHILEM */
- }
- if (data && fl & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (flags & SCF_DO_SUBSTR) {
- SV *last_str = NULL;
- int counted = mincount != 0;
-
- if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */
-#if defined(SPARC64_GCC_WORKAROUND)
- I32 b = 0;
- STRLEN l = 0;
- const char *s = NULL;
- I32 old = 0;
-
- if (pos_before >= data->last_start_min)
- b = pos_before;
- else
- b = data->last_start_min;
-
- l = 0;
- s = SvPV_const(data->last_found, l);
- old = b - data->last_start_min;
-
-#else
- I32 b = pos_before >= data->last_start_min
- ? pos_before : data->last_start_min;
- STRLEN l;
- const char * const s = SvPV_const(data->last_found, l);
- I32 old = b - data->last_start_min;
-#endif
-
- if (UTF)
- old = utf8_hop((U8*)s, old) - (U8*)s;
-
- l -= old;
- /* Get the added string: */
- last_str = newSVpvn_utf8(s + old, l, UTF);
- if (deltanext == 0 && pos_before == b) {
- /* What was added is a constant string */
- if (mincount > 1) {
- SvGROW(last_str, (mincount * l) + 1);
- repeatcpy(SvPVX(last_str) + l,
- SvPVX_const(last_str), l, mincount - 1);
- SvCUR_set(last_str, SvCUR(last_str) * mincount);
- /* Add additional parts. */
- SvCUR_set(data->last_found,
- SvCUR(data->last_found) - l);
- sv_catsv(data->last_found, last_str);
- {
- SV * sv = data->last_found;
- MAGIC *mg =
- SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
- if (mg && mg->mg_len >= 0)
- mg->mg_len += CHR_SVLEN(last_str) - l;
- }
- data->last_end += l * (mincount - 1);
- }
- } else {
- /* start offset must point into the last copy */
- data->last_start_min += minnext * (mincount - 1);
- data->last_start_max += is_inf ? I32_MAX
- : (maxcount - 1) * (minnext + data->pos_delta);
- }
- }
- /* It is counted once already... */
- data->pos_min += minnext * (mincount - counted);
- data->pos_delta += - counted * deltanext +
- (minnext + deltanext) * maxcount - minnext * mincount;
- if (mincount != maxcount) {
- /* Cannot extend fixed substrings found inside
- the group. */
- SCAN_COMMIT(pRExC_state,data,minlenp);
- if (mincount && last_str) {
- SV * const sv = data->last_found;
- MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ?
- mg_find(sv, PERL_MAGIC_utf8) : NULL;
-
- if (mg)
- mg->mg_len = -1;
- sv_setsv(sv, last_str);
- data->last_end = data->pos_min;
- data->last_start_min =
- data->pos_min - CHR_SVLEN(last_str);
- data->last_start_max = is_inf
- ? I32_MAX
- : data->pos_min + data->pos_delta
- - CHR_SVLEN(last_str);
- }
- data->longest = &(data->longest_float);
- }
- SvREFCNT_dec(last_str);
- }
- if (data && (fl & SF_HAS_EVAL))
- data->flags |= SF_HAS_EVAL;
- optimize_curly_tail:
- if (OP(oscan) != CURLYX) {
- while (PL_regkind[OP(next = regnext(oscan))] == NOTHING
- && NEXT_OFF(next))
- NEXT_OFF(oscan) += NEXT_OFF(next);
- }
- continue;
- default: /* REF and CLUMP only? */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR)
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- break;
- }
- }
- else if (OP(scan) == LNBREAK) {
- if (flags & SCF_DO_STCLASS) {
- int value = 0;
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
- if (flags & SCF_DO_STCLASS_AND) {
- for (value = 0; value < 256; value++)
- if (!is_VERTWS_cp(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- for (value = 0; value < 256; value++)
- if (is_VERTWS_cp(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- min += 1;
- delta += 1;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += 1;
- data->longest = &(data->longest_float);
- }
-
- }
- else if (OP(scan) == FOLDCHAR) {
- int d = ARG(scan)==0xDF ? 1 : 2;
- flags &= ~SCF_DO_STCLASS;
- min += 1;
- delta += d;
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += 1;
- data->pos_delta += d;
- data->longest = &(data->longest_float);
- }
- }
- else if (strchr((const char*)PL_simple,OP(scan))) {
- int value = 0;
-
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->pos_min++;
- }
- min++;
- if (flags & SCF_DO_STCLASS) {
- data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
-
- /* Some of the logic below assumes that switching
- locale on will only add false positives. */
- switch (PL_regkind[OP(scan)]) {
- case SANY:
- default:
- do_default:
- /* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- break;
- case REG_ANY:
- if (OP(scan) == SANY)
- goto do_default;
- if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */
- value = (ANYOF_BITMAP_TEST(data->start_class,'\n')
- || (data->start_class->flags & ANYOF_CLASS));
- cl_anything(pRExC_state, data->start_class);
- }
- if (flags & SCF_DO_STCLASS_AND || !value)
- ANYOF_BITMAP_CLEAR(data->start_class,'\n');
- break;
- case ANYOF:
- if (flags & SCF_DO_STCLASS_AND)
- cl_and(data->start_class,
- (struct regnode_charclass_class*)scan);
- else
- cl_or(pRExC_state, data->start_class,
- (struct regnode_charclass_class*)scan);
- break;
- case ALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case ALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
- }
- else {
- ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
- data->start_class->flags |= ANYOF_LOCALE;
- }
- break;
- case NALNUM:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- for (value = 0; value < 256; value++)
- if (isALNUM(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- else {
- for (value = 0; value < 256; value++)
- if (!isALNUM(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NALNUML:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
- }
- break;
- case SPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- else {
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case SPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
- }
- break;
- case NSPACE:
- if (flags & SCF_DO_STCLASS_AND) {
- if (!(data->start_class->flags & ANYOF_LOCALE)) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- else {
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NSPACEL:
- if (flags & SCF_DO_STCLASS_AND) {
- if (data->start_class->flags & ANYOF_LOCALE) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
- for (value = 0; value < 256; value++)
- if (!isSPACE(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- }
- else {
- data->start_class->flags |= ANYOF_LOCALE;
- ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
- }
- break;
- case DIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT);
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- case NDIGIT:
- if (flags & SCF_DO_STCLASS_AND) {
- ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT);
- for (value = 0; value < 256; value++)
- if (isDIGIT(value))
- ANYOF_BITMAP_CLEAR(data->start_class, value);
- }
- else {
- if (data->start_class->flags & ANYOF_LOCALE)
- ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT);
- else {
- for (value = 0; value < 256; value++)
- if (!isDIGIT(value))
- ANYOF_BITMAP_SET(data->start_class, value);
- }
- }
- break;
- CASE_SYNST_FNC(VERTWS);
- CASE_SYNST_FNC(HORIZWS);
-
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (PL_regkind[OP(scan)] == EOL && flags & SCF_DO_SUBSTR) {
- data->flags |= (OP(scan) == MEOL
- ? SF_BEFORE_MEOL
- : SF_BEFORE_SEOL);
- }
- else if ( PL_regkind[OP(scan)] == BRANCHJ
- /* Lookbehind, or need to calculate parens/evals/stclass: */
- && (scan->flags || data || (flags & SCF_DO_STCLASS))
- && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) {
- if ( !PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- || OP(scan) == UNLESSM )
- {
- /* Negative Lookahead/lookbehind
- In this case we can't do fixed string optimisation.
- */
-
- I32 deltanext, minnext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
- minnext = study_chunk(pRExC_state, &nscan, minlenp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f, depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (minnext > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)minnext;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (f & SCF_DO_STCLASS_AND) {
- if (flags & SCF_DO_STCLASS_OR) {
- /* OR before, AND after: ideally we would recurse with
- * data_fake to get the AND applied by study of the
- * remainder of the pattern, and then derecurse;
- * *** HACK *** for now just treat as "no information".
- * See [perl #56690].
- */
- cl_init(pRExC_state, data->start_class);
- } else {
- /* AND before and after: combine and continue */
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- }
-#if PERL_ENABLE_POSITIVE_ASSERTION_STUDY
- else {
- /* Positive Lookahead/lookbehind
- In this case we can do fixed string optimisation,
- but we must be careful about it. Note in the case of
- lookbehind the positions will be offset by the minimum
- length of the pattern, something we won't know about
- until after the recurse.
- */
- I32 deltanext, fake = 0;
- regnode *nscan;
- struct regnode_charclass_class intrnl;
- int f = 0;
- /* We use SAVEFREEPV so that when the full compile
- is finished perl will clean up the allocated
- minlens when its all done. This was we don't
- have to worry about freeing them when we know
- they wont be used, which would be a pain.
- */
- I32 *minnextp;
- Newx( minnextp, 1, I32 );
- SAVEFREEPV(minnextp);
-
- if (data) {
- StructCopy(data, &data_fake, scan_data_t);
- if ((flags & SCF_DO_SUBSTR) && data->last_found) {
- f |= SCF_DO_SUBSTR;
- if (scan->flags)
- SCAN_COMMIT(pRExC_state, &data_fake,minlenp);
- data_fake.last_found=newSVsv(data->last_found);
- }
- }
- else
- data_fake.last_closep = &fake;
- data_fake.flags = 0;
- data_fake.pos_delta = delta;
- if (is_inf)
- data_fake.flags |= SF_IS_INF;
- if ( flags & SCF_DO_STCLASS && !scan->flags
- && OP(scan) == IFMATCH ) { /* Lookahead */
- cl_init(pRExC_state, &intrnl);
- data_fake.start_class = &intrnl;
- f |= SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
- next = regnext(scan);
- nscan = NEXTOPER(NEXTOPER(scan));
-
- *minnextp = study_chunk(pRExC_state, &nscan, minnextp, &deltanext,
- last, &data_fake, stopparen, recursed, NULL, f,depth+1);
- if (scan->flags) {
- if (deltanext) {
- FAIL("Variable length lookbehind not implemented");
- }
- else if (*minnextp > (I32)U8_MAX) {
- FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
- }
- scan->flags = (U8)*minnextp;
- }
-
- *minnextp += min;
-
- if (f & SCF_DO_STCLASS_AND) {
- const int was = (data->start_class->flags & ANYOF_EOS);
-
- cl_and(data->start_class, &intrnl);
- if (was)
- data->start_class->flags |= ANYOF_EOS;
- }
- if (data) {
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- if ((flags & SCF_DO_SUBSTR) && data_fake.last_found) {
- if (RExC_rx->minlen<*minnextp)
- RExC_rx->minlen=*minnextp;
- SCAN_COMMIT(pRExC_state, &data_fake, minnextp);
- SvREFCNT_dec(data_fake.last_found);
-
- if ( data_fake.minlen_fixed != minlenp )
- {
- data->offset_fixed= data_fake.offset_fixed;
- data->minlen_fixed= data_fake.minlen_fixed;
- data->lookbehind_fixed+= scan->flags;
- }
- if ( data_fake.minlen_float != minlenp )
- {
- data->minlen_float= data_fake.minlen_float;
- data->offset_float_min=data_fake.offset_float_min;
- data->offset_float_max=data_fake.offset_float_max;
- data->lookbehind_float+= scan->flags;
- }
- }
- }
-
-
- }
-#endif
- }
- else if (OP(scan) == OPEN) {
- if (stopparen != (I32)ARG(scan))
- pars++;
- }
- else if (OP(scan) == CLOSE) {
- if (stopparen == (I32)ARG(scan)) {
- break;
- }
- if ((I32)ARG(scan) == is_par) {
- next = regnext(scan);
-
- if ( next && (OP(next) != WHILEM) && next < last)
- is_par = 0; /* Disable optimization */
- }
- if (data)
- *(data->last_closep) = ARG(scan);
- }
- else if (OP(scan) == EVAL) {
- if (data)
- data->flags |= SF_HAS_EVAL;
- }
- else if ( PL_regkind[OP(scan)] == ENDLIKE ) {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- flags &= ~SCF_DO_SUBSTR;
- }
- if (data && OP(scan)==ACCEPT) {
- data->flags |= SCF_SEEN_ACCEPT;
- if (stopmin > min)
- stopmin = min;
- }
- }
- else if (OP(scan) == LOGICAL && scan->flags == 2) /* Embedded follows */
- {
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp);
- data->longest = &(data->longest_float);
- }
- is_inf = is_inf_internal = 1;
- if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
- cl_anything(pRExC_state, data->start_class);
- flags &= ~SCF_DO_STCLASS;
- }
- else if (OP(scan) == GPOS) {
- if (!(RExC_rx->extflags & RXf_GPOS_FLOAT) &&
- !(delta || is_inf || (data && data->pos_delta)))
- {
- if (!(RExC_rx->extflags & RXf_ANCH) && (flags & SCF_DO_SUBSTR))
- RExC_rx->extflags |= RXf_ANCH_GPOS;
- if (RExC_rx->gofs < (U32)min)
- RExC_rx->gofs = min;
- } else {
- RExC_rx->extflags |= RXf_GPOS_FLOAT;
- RExC_rx->gofs = 0;
- }
- }
-#ifdef TRIE_STUDY_OPT
-#ifdef FULL_TRIE_STUDY
- else if (PL_regkind[OP(scan)] == TRIE) {
- /* NOTE - There is similar code to this block above for handling
- BRANCH nodes on the initial study. If you change stuff here
- check there too. */
- regnode *trie_node= scan;
- regnode *tail= regnext(scan);
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- I32 max1 = 0, min1 = I32_MAX;
- struct regnode_charclass_class accum;
-
- if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */
- SCAN_COMMIT(pRExC_state, data,minlenp); /* Cannot merge strings after this. */
- if (flags & SCF_DO_STCLASS)
- cl_init_zero(pRExC_state, &accum);
-
- if (!trie->jump) {
- min1= trie->minlen;
- max1= trie->maxlen;
- } else {
- const regnode *nextbranch= NULL;
- U32 word;
-
- for ( word=1 ; word <= trie->wordcount ; word++)
- {
- I32 deltanext=0, minnext=0, f = 0, fake;
- struct regnode_charclass_class this_class;
-
- data_fake.flags = 0;
- if (data) {
- data_fake.whilem_c = data->whilem_c;
- data_fake.last_closep = data->last_closep;
- }
- else
- data_fake.last_closep = &fake;
- data_fake.pos_delta = delta;
- if (flags & SCF_DO_STCLASS) {
- cl_init(pRExC_state, &this_class);
- data_fake.start_class = &this_class;
- f = SCF_DO_STCLASS_AND;
- }
- if (flags & SCF_WHILEM_VISITED_POS)
- f |= SCF_WHILEM_VISITED_POS;
-
- if (trie->jump[word]) {
- if (!nextbranch)
- nextbranch = trie_node + trie->jump[0];
- scan= trie_node + trie->jump[word];
- /* We go from the jump point to the branch that follows
- it. Note this means we need the vestigal unused branches
- even though they arent otherwise used.
- */
- minnext = study_chunk(pRExC_state, &scan, minlenp,
- &deltanext, (regnode *)nextbranch, &data_fake,
- stopparen, recursed, NULL, f,depth+1);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode*)nextbranch);
-
- if (min1 > (I32)(minnext + trie->minlen))
- min1 = minnext + trie->minlen;
- if (max1 < (I32)(minnext + deltanext + trie->maxlen))
- max1 = minnext + deltanext + trie->maxlen;
- if (deltanext == I32_MAX)
- is_inf = is_inf_internal = 1;
-
- if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
- pars++;
- if (data_fake.flags & SCF_SEEN_ACCEPT) {
- if ( stopmin > min + min1)
- stopmin = min + min1;
- flags &= ~SCF_DO_SUBSTR;
- if (data)
- data->flags |= SCF_SEEN_ACCEPT;
- }
- if (data) {
- if (data_fake.flags & SF_HAS_EVAL)
- data->flags |= SF_HAS_EVAL;
- data->whilem_c = data_fake.whilem_c;
- }
- if (flags & SCF_DO_STCLASS)
- cl_or(pRExC_state, &accum, &this_class);
- }
- }
- if (flags & SCF_DO_SUBSTR) {
- data->pos_min += min1;
- data->pos_delta += max1 - min1;
- if (max1 != min1 || is_inf)
- data->longest = &(data->longest_float);
- }
- min += min1;
- delta += max1 - min1;
- if (flags & SCF_DO_STCLASS_OR) {
- cl_or(pRExC_state, data->start_class, &accum);
- if (min1) {
- cl_and(data->start_class, and_withp);
- flags &= ~SCF_DO_STCLASS;
- }
- }
- else if (flags & SCF_DO_STCLASS_AND) {
- if (min1) {
- cl_and(data->start_class, &accum);
- flags &= ~SCF_DO_STCLASS;
- }
- else {
- /* Switch to OR mode: cache the old value of
- * data->start_class */
- INIT_AND_WITHP;
- StructCopy(data->start_class, and_withp,
- struct regnode_charclass_class);
- flags &= ~SCF_DO_STCLASS_AND;
- StructCopy(&accum, data->start_class,
- struct regnode_charclass_class);
- flags |= SCF_DO_STCLASS_OR;
- data->start_class->flags |= ANYOF_EOS;
- }
- }
- scan= tail;
- continue;
- }
-#else
- else if (PL_regkind[OP(scan)] == TRIE) {
- reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ];
- U8*bang=NULL;
-
- min += trie->minlen;
- delta += (trie->maxlen - trie->minlen);
- flags &= ~SCF_DO_STCLASS; /* xxx */
- if (flags & SCF_DO_SUBSTR) {
- SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */
- data->pos_min += trie->minlen;
- data->pos_delta += (trie->maxlen - trie->minlen);
- if (trie->maxlen != trie->minlen)
- data->longest = &(data->longest_float);
- }
- if (trie->jump) /* no more substrings -- for now /grr*/
- flags &= ~SCF_DO_SUBSTR;
- }
-#endif /* old or new */
-#endif /* TRIE_STUDY_OPT */
-
- /* Else: zero-length, ignore. */
- scan = regnext(scan);
- }
- if (frame) {
- last = frame->last;
- scan = frame->next;
- stopparen = frame->stop;
- frame = frame->prev;
- goto fake_study_recurse;
- }
-
- finish:
- assert(!frame);
- DEBUG_STUDYDATA("pre-fin:",data,depth);
-
- *scanp = scan;
- *deltap = is_inf_internal ? I32_MAX : delta;
- if (flags & SCF_DO_SUBSTR && is_inf)
- data->pos_delta = I32_MAX - data->pos_min;
- if (is_par > (I32)U8_MAX)
- is_par = 0;
- if (is_par && pars==1 && data) {
- data->flags |= SF_IN_PAR;
- data->flags &= ~SF_HAS_PAR;
- }
- else if (pars && data) {
- data->flags |= SF_HAS_PAR;
- data->flags &= ~SF_IN_PAR;
- }
- if (flags & SCF_DO_STCLASS_OR)
- cl_and(data->start_class, and_withp);
- if (flags & SCF_TRIE_RESTUDY)
- data->flags |= SCF_TRIE_RESTUDY;
-
- DEBUG_STUDYDATA("post-fin:",data,depth);
-
- return min < stopmin ? min : stopmin;
-}
-
-STATIC U32
-S_add_data(RExC_state_t *pRExC_state, U32 n, const char *s)
-{
- U32 count = RExC_rxi->data ? RExC_rxi->data->count : 0;
-
- PERL_ARGS_ASSERT_ADD_DATA;
-
- Renewc(RExC_rxi->data,
- sizeof(*RExC_rxi->data) + sizeof(void*) * (count + n - 1),
- char, struct reg_data);
- if(count)
- Renew(RExC_rxi->data->what, count + n, U8);
- else
- Newx(RExC_rxi->data->what, n, U8);
- RExC_rxi->data->count = count + n;
- Copy(s, RExC_rxi->data->what + count, n, U8);
- return count;
-}
-
-/*XXX: todo make this not included in a non debugging perl */
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_reginitcolors(pTHX)
-{
- dVAR;
- const char * const s = PerlEnv_getenv("PERL_RE_COLORS");
- if (s) {
- char *t = savepv(s);
- int i = 0;
- PL_colors[0] = t;
- while (++i < 6) {
- t = strchr(t, '\t');
- if (t) {
- *t = '\0';
- PL_colors[i] = ++t;
- }
- else
- PL_colors[i] = t = (char *)"";
- }
- } else {
- int i = 0;
- while (i < 6)
- PL_colors[i++] = (char *)"";
- }
- PL_colorset = 1;
-}
-#endif
-
-
-#ifdef TRIE_STUDY_OPT
-#define CHECK_RESTUDY_GOTO \
- if ( \
- (data.flags & SCF_TRIE_RESTUDY) \
- && ! restudied++ \
- ) goto reStudy
-#else
-#define CHECK_RESTUDY_GOTO
-#endif
-
-/*
- - pregcomp - compile a regular expression into internal code
- *
- * We can't allocate space until we know how big the compiled form will be,
- * but we can't compile it (and thus know how big it is) until we've got a
- * place to put the code. So we cheat: we compile it twice, once with code
- * generation turned off and size counting turned on, and once "for real".
- * This also means that we don't allocate space until we are sure that the
- * thing really will compile successfully, and we never have to move the
- * code and thus invalidate pointers into it. (Note that it has to be in
- * one piece because free() must be able to free it all.) [NB: not true in perl]
- *
- * Beware that the optimization-preparation code in here knows about some
- * of the structure of the compiled regexp. [I'll say.]
- */
-
-
-
-#ifndef PERL_IN_XSUB_RE
-#define RE_ENGINE_PTR &reh_regexp_engine
-#else
-extern const struct regexp_engine my_reg_engine;
-#define RE_ENGINE_PTR &my_reg_engine
-#endif
-
-#ifndef PERL_IN_XSUB_RE
-REGEXP *
-Perl_pregcomp(pTHX_ SV * const pattern, const U32 flags)
-{
- dVAR;
- HV * const table = GvHV(PL_hintgv);
-
- PERL_ARGS_ASSERT_PREGCOMP;
-
- /* Dispatch a request to compile a regexp to correct
- regexp engine. */
- if (table) {
- SV **ptr= hv_fetchs(table, "regcomp", FALSE);
- GET_RE_DEBUG_FLAGS_DECL;
- if (ptr && SvIOK(*ptr) && SvIV(*ptr)) {
- const regexp_engine *eng=INT2PTR(regexp_engine*,SvIV(*ptr));
- DEBUG_COMPILE_r({
- PerlIO_printf(Perl_debug_log, "Using engine %"UVxf"\n",
- SvIV(*ptr));
- });
- return CALLREGCOMP_ENG(eng, pattern, flags);
- }
- }
- return Perl_re_compile(aTHX_ pattern, flags);
-}
-#endif
-
-REGEXP *
-Perl_re_compile(pTHX_ SV * const pattern, U32 pm_flags)
-{
- dVAR;
- REGEXP *rx;
- struct regexp *r;
- register regexp_internal *ri;
- STRLEN plen;
- char *exp = SvPV(pattern, plen);
- char* xend = exp + plen;
- regnode *scan;
- I32 flags;
- I32 minlen = 0;
- I32 sawplus = 0;
- I32 sawopen = 0;
- scan_data_t data;
- RExC_state_t RExC_state;
- RExC_state_t * const pRExC_state = &RExC_state;
-#ifdef TRIE_STUDY_OPT
- int restudied= 0;
- RExC_state_t copyRExC_state;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_COMPILE;
-
- DEBUG_r(if (!PL_colorset) reginitcolors());
-
- RExC_utf8 = RExC_orig_utf8 = SvUTF8(pattern);
-
- DEBUG_COMPILE_r({
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RExC_utf8,
- dsv, exp, plen, 60);
- PerlIO_printf(Perl_debug_log, "%sCompiling REx%s %s\n",
- PL_colors[4],PL_colors[5],s);
- });
-
-redo_first_pass:
- RExC_precomp = exp;
- RExC_flags = pm_flags;
- RExC_sawback = 0;
-
- RExC_seen = 0;
- RExC_seen_zerolen = *exp == '^' ? -1 : 0;
- RExC_seen_evals = 0;
- RExC_extralen = 0;
-
- /* First pass: determine size, legality. */
- RExC_parse = exp;
- RExC_start = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_nestroot = 0;
- RExC_size = 0L;
- RExC_emit = &PL_regdummy;
- RExC_whilem_seen = 0;
- RExC_open_parens = NULL;
- RExC_close_parens = NULL;
- RExC_opend = NULL;
- RExC_paren_names = NULL;
-#ifdef DEBUGGING
- RExC_paren_name_list = NULL;
-#endif
- RExC_recurse = NULL;
- RExC_recurse_count = 0;
-
-#if 0 /* REGC() is (currently) a NOP at the first pass.
- * Clever compilers notice this and complain. --jhi */
- REGC((U8)REG_MAGIC, (char*)RExC_emit);
-#endif
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n"));
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- RExC_precomp = NULL;
- return(NULL);
- }
- if (RExC_utf8 && !RExC_orig_utf8) {
- /* It's possible to write a regexp in ascii that represents Unicode
- codepoints outside of the byte range, such as via \x{100}. If we
- detect such a sequence we have to convert the entire pattern to utf8
- and then recompile, as our sizing calculation will have been based
- on 1 byte == 1 character, but we will need to use utf8 to encode
- at least some part of the pattern, and therefore must convert the whole
- thing.
- XXX: somehow figure out how to make this less expensive...
- -- dmq */
- STRLEN len = plen;
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log,
- "UTF8 mismatch! Converting to utf8 for resizing and compile\n"));
- exp = (char*)Perl_bytes_to_utf8(aTHX_ (U8*)exp, &len);
- xend = exp + len;
- RExC_orig_utf8 = RExC_utf8;
- SAVEFREEPV(exp);
- goto redo_first_pass;
- }
- DEBUG_PARSE_r({
- PerlIO_printf(Perl_debug_log,
- "Required size %"IVdf" nodes\n"
- "Starting second pass (creation)\n",
- (IV)RExC_size);
- RExC_lastnum=0;
- RExC_lastparse=NULL;
- });
- /* Small enough for pointer-storage convention?
- If extralen==0, this means that we will not need long jumps. */
- if (RExC_size >= 0x10000L && RExC_extralen)
- RExC_size += RExC_extralen;
- else
- RExC_extralen = 0;
- if (RExC_whilem_seen > 15)
- RExC_whilem_seen = 15;
-
- /* Allocate space and zero-initialize. Note, the two step process
- of zeroing when in debug mode, thus anything assigned has to
- happen after that */
- rx = (REGEXP*) newSV_type(SVt_REGEXP);
- r = (struct regexp*)SvANY(rx);
- Newxc(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode),
- char, regexp_internal);
- if ( r == NULL || ri == NULL )
- FAIL("Regexp out of space");
-#ifdef DEBUGGING
- /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */
- Zero(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode), char);
-#else
- /* bulk initialize base fields with 0. */
- Zero(ri, sizeof(regexp_internal), char);
-#endif
-
- /* non-zero initialization begins here */
- RXi_SET( r, ri );
- r->engine= RE_ENGINE_PTR;
- r->extflags = pm_flags;
- {
- bool has_p = ((r->extflags & RXf_PMf_KEEPCOPY) == RXf_PMf_KEEPCOPY);
- bool has_minus = ((r->extflags & RXf_PMf_STD_PMMOD) != RXf_PMf_STD_PMMOD);
- bool has_runon = ((RExC_seen & REG_SEEN_RUN_ON_COMMENT)==REG_SEEN_RUN_ON_COMMENT);
- U16 reganch = (U16)((r->extflags & RXf_PMf_STD_PMMOD)
- >> RXf_PMf_STD_PMMOD_SHIFT);
- const char *fptr = STD_PAT_MODS; /*"msix"*/
- char *p;
- const STRLEN wraplen = plen + has_minus + has_p + has_runon
- + (sizeof(STD_PAT_MODS) - 1)
- + (sizeof("(?:)") - 1);
-
- p = sv_grow(MUTABLE_SV(rx), wraplen + 1);
- SvCUR_set(rx, wraplen);
- SvPOK_on(rx);
- SvFLAGS(rx) |= SvUTF8(pattern);
- *p++='('; *p++='?';
- if (has_p)
- *p++ = KEEPCOPY_PAT_MOD; /*'p'*/
- {
- char *r = p + (sizeof(STD_PAT_MODS) - 1) + has_minus - 1;
- char *colon = r + 1;
- char ch;
-
- while((ch = *fptr++)) {
- if(reganch & 1)
- *p++ = ch;
- else
- *r-- = ch;
- reganch >>= 1;
- }
- if(has_minus) {
- *r = '-';
- p = colon;
- }
- }
-
- *p++ = ':';
- Copy(RExC_precomp, p, plen, char);
- assert ((RX_WRAPPED(rx) - p) < 16);
- r->pre_prefix = p - RX_WRAPPED(rx);
- p += plen;
- if (has_runon)
- *p++ = '\n';
- *p++ = ')';
- *p = 0;
- }
-
- r->intflags = 0;
- r->nparens = RExC_npar - 1; /* set early to validate backrefs */
-
- if (RExC_seen & REG_SEEN_RECURSE) {
- Newxz(RExC_open_parens, RExC_npar,regnode *);
- SAVEFREEPV(RExC_open_parens);
- Newxz(RExC_close_parens,RExC_npar,regnode *);
- SAVEFREEPV(RExC_close_parens);
- }
-
- /* Useful during FAIL. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- Newxz(ri->u.offsets, 2*RExC_size+1, U32); /* MJD 20001228 */
- DEBUG_OFFSETS_r(PerlIO_printf(Perl_debug_log,
- "%s %"UVuf" bytes for offset annotations.\n",
- ri->u.offsets ? "Got" : "Couldn't get",
- (UV)((2*RExC_size+1) * sizeof(U32))));
-#endif
- SetProgLen(ri,RExC_size);
- RExC_rx_sv = rx;
- RExC_rx = r;
- RExC_rxi = ri;
- REH_CALL_COMP_BEGIN_HOOK(pRExC_state->rx);
-
- /* Second pass: emit code. */
- RExC_flags = pm_flags; /* don't let top level (?i) bleed */
- RExC_parse = exp;
- RExC_end = xend;
- RExC_naughty = 0;
- RExC_npar = 1;
- RExC_emit_start = ri->program;
- RExC_emit = ri->program;
- RExC_emit_bound = ri->program + RExC_size + 1;
-
- /* Store the count of eval-groups for security checks: */
- RExC_rx->seen_evals = RExC_seen_evals;
- REGC((U8)REG_MAGIC, (char*) RExC_emit++);
- if (reg(pRExC_state, 0, &flags,1) == NULL) {
- ReREFCNT_dec(rx);
- return(NULL);
- }
- /* XXXX To minimize changes to RE engine we always allocate
- 3-units-long substrs field. */
- Newx(r->substrs, 1, struct reg_substr_data);
- if (RExC_recurse_count) {
- Newxz(RExC_recurse,RExC_recurse_count,regnode *);
- SAVEFREEPV(RExC_recurse);
- }
-
-reStudy:
- r->minlen = minlen = sawplus = sawopen = 0;
- Zero(r->substrs, 1, struct reg_substr_data);
-
-#ifdef TRIE_STUDY_OPT
- if (!restudied) {
- StructCopy(&zero_scan_data, &data, scan_data_t);
- copyRExC_state = RExC_state;
- } else {
- U32 seen=RExC_seen;
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log,"Restudying\n"));
-
- RExC_state = copyRExC_state;
- if (seen & REG_TOP_LEVEL_BRANCHES)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
- else
- RExC_seen &= ~REG_TOP_LEVEL_BRANCHES;
- if (data.last_found) {
- SvREFCNT_dec(data.longest_fixed);
- SvREFCNT_dec(data.longest_float);
- SvREFCNT_dec(data.last_found);
- }
- StructCopy(&zero_scan_data, &data, scan_data_t);
- }
-#else
- StructCopy(&zero_scan_data, &data, scan_data_t);
-#endif
-
- /* Dig out information for optimizations. */
- r->extflags = RExC_flags; /* was pm_op */
- /*dmq: removed as part of de-PMOP: pm->op_pmflags = RExC_flags; */
-
- if (UTF)
- SvUTF8_on(rx); /* Unicode in it? */
- ri->regstclass = NULL;
- if (RExC_naughty >= 10) /* Probably an expensive pattern. */
- r->intflags |= PREGf_NAUGHTY;
- scan = ri->program + 1; /* First BRANCH. */
-
- /* testing for BRANCH here tells us whether there is "must appear"
- data in the pattern. If there is then we can use it for optimisations */
- if (!(RExC_seen & REG_TOP_LEVEL_BRANCHES)) { /* Only one top-level choice. */
- I32 fake;
- STRLEN longest_float_length, longest_fixed_length;
- struct regnode_charclass_class ch_class; /* pointed to by data */
- int stclass_flag;
- I32 last_close = 0; /* pointed to by data */
- regnode *first= scan;
- regnode *first_next= regnext(first);
-
- /*
- * Skip introductions and multiplicators >= 1
- * so that we can extract the 'meat' of the pattern that must
- * match in the large if() sequence following.
- * NOTE that EXACT is NOT covered here, as it is normally
- * picked up by the optimiser separately.
- *
- * This is unfortunate as the optimiser isnt handling lookahead
- * properly currently.
- *
- */
- while ((OP(first) == OPEN && (sawopen = 1)) ||
- /* An OR of *one* alternative - should not happen now. */
- (OP(first) == BRANCH && OP(first_next) != BRANCH) ||
- /* for now we can't handle lookbehind IFMATCH*/
- (OP(first) == IFMATCH && !first->flags) ||
- (OP(first) == PLUS) ||
- (OP(first) == MINMOD) ||
- /* An {n,m} with n>0 */
- (PL_regkind[OP(first)] == CURLY && ARG1(first) > 0) ||
- (OP(first) == NOTHING && PL_regkind[OP(first_next)] != END ))
- {
- /*
- * the only op that could be a regnode is PLUS, all the rest
- * will be regnode_1 or regnode_2.
- *
- */
- if (OP(first) == PLUS)
- sawplus = 1;
- else
- first += regarglen[OP(first)];
-
- first = NEXTOPER(first);
- first_next= regnext(first);
- }
-
- /* Starting-point info. */
- again:
- DEBUG_PEEP("first:",first,0);
- /* Ignore EXACT as we deal with it later. */
- if (PL_regkind[OP(first)] == EXACT) {
- if (OP(first) == EXACT)
- NOOP; /* Empty, get anchored substr later. */
- else if ((OP(first) == EXACTF || OP(first) == EXACTFL))
- ri->regstclass = first;
- }
-#ifdef TRIE_STCLASS
- else if (PL_regkind[OP(first)] == TRIE &&
- ((reg_trie_data *)ri->data->data[ ARG(first) ])->minlen>0)
- {
- regnode *trie_op;
- /* this can happen only on restudy */
- if ( OP(first) == TRIE ) {
- struct regnode_1 *trieop = (struct regnode_1 *)
- PerlMemShared_calloc(1, sizeof(struct regnode_1));
- StructCopy(first,trieop,struct regnode_1);
- trie_op=(regnode *)trieop;
- } else {
- struct regnode_charclass *trieop = (struct regnode_charclass *)
- PerlMemShared_calloc(1, sizeof(struct regnode_charclass));
- StructCopy(first,trieop,struct regnode_charclass);
- trie_op=(regnode *)trieop;
- }
- OP(trie_op)+=2;
- make_trie_failtable(pRExC_state, (regnode *)first, trie_op, 0);
- ri->regstclass = trie_op;
- }
-#endif
- else if (strchr((const char*)PL_simple,OP(first)))
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOUND ||
- PL_regkind[OP(first)] == NBOUND)
- ri->regstclass = first;
- else if (PL_regkind[OP(first)] == BOL) {
- r->extflags |= (OP(first) == MBOL
- ? RXf_ANCH_MBOL
- : (OP(first) == SBOL
- ? RXf_ANCH_SBOL
- : RXf_ANCH_BOL));
- first = NEXTOPER(first);
- goto again;
- }
- else if (OP(first) == GPOS) {
- r->extflags |= RXf_ANCH_GPOS;
- first = NEXTOPER(first);
- goto again;
- }
- else if ((!sawopen || !RExC_sawback) &&
- (OP(first) == STAR &&
- PL_regkind[OP(NEXTOPER(first))] == REG_ANY) &&
- !(r->extflags & RXf_ANCH) && !(RExC_seen & REG_SEEN_EVAL))
- {
- /* turn .* into ^.* with an implied $*=1 */
- const int type =
- (OP(NEXTOPER(first)) == REG_ANY)
- ? RXf_ANCH_MBOL
- : RXf_ANCH_SBOL;
- r->extflags |= type;
- r->intflags |= PREGf_IMPLICIT;
- first = NEXTOPER(first);
- goto again;
- }
- if (sawplus && (!sawopen || !RExC_sawback)
- && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */
- /* x+ must match at the 1st pos of run of x's */
- r->intflags |= PREGf_SKIP;
-
- /* Scan is after the zeroth branch, first is atomic matcher. */
-#ifdef TRIE_STUDY_OPT
- DEBUG_PARSE_r(
- if (!restudied)
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#else
- DEBUG_PARSE_r(
- PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
- (IV)(first - scan + 1))
- );
-#endif
-
-
- /*
- * If there's something expensive in the r.e., find the
- * longest literal string that must appear and make it the
- * regmust. Resolve ties in favor of later strings, since
- * the regstart check works with the beginning of the r.e.
- * and avoiding duplication strengthens checking. Not a
- * strong reason, but sufficient in the absence of others.
- * [Now we resolve ties in favor of the earlier string if
- * it happens that c_offset_min has been invalidated, since the
- * earlier string may buy us something the later one won't.]
- */
-
- data.longest_fixed = newSVpvs("");
- data.longest_float = newSVpvs("");
- data.last_found = newSVpvs("");
- data.longest = &(data.longest_fixed);
- first = scan;
- if (!ri->regstclass) {
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- stclass_flag = SCF_DO_STCLASS_AND;
- } else /* XXXX Check for BOUND? */
- stclass_flag = 0;
- data.last_closep = &last_close;
-
- minlen = study_chunk(pRExC_state, &first, &minlen, &fake, scan + RExC_size, /* Up to end */
- &data, -1, NULL, NULL,
- SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag,0);
-
-
- CHECK_RESTUDY_GOTO;
-
-
- if ( RExC_npar == 1 && data.longest == &(data.longest_fixed)
- && data.last_start_min == 0 && data.last_end > 0
- && !RExC_seen_zerolen
- && !(RExC_seen & REG_SEEN_VERBARG)
- && (!(RExC_seen & REG_SEEN_GPOS) || (r->extflags & RXf_ANCH_GPOS)))
- r->extflags |= RXf_CHECK_ALL;
- scan_commit(pRExC_state, &data,&minlen,0);
- SvREFCNT_dec(data.last_found);
-
- /* Note that code very similar to this but for anchored string
- follows immediately below, changes may need to be made to both.
- Be careful.
- */
- longest_float_length = CHR_SVLEN(data.longest_float);
- if (longest_float_length
- || (data.flags & SF_FL_BEFORE_EOL
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */
- && data.offset_fixed == data.offset_float_min
- && SvCUR(data.longest_fixed) == SvCUR(data.longest_float))
- goto remove_float; /* As in (a)+. */
-
- /* copy the information about the longest float from the reg_scan_data
- over to the program. */
- if (SvUTF8(data.longest_float)) {
- r->float_utf8 = data.longest_float;
- r->float_substr = NULL;
- } else {
- r->float_substr = data.longest_float;
- r->float_utf8 = NULL;
- }
- /* float_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_float ? *(data.minlen_float)
- : (I32)longest_float_length;
- r->float_end_shift = ml - data.offset_float_min
- - longest_float_length + (SvTAIL(data.longest_float) != 0)
- + data.lookbehind_float;
- r->float_min_offset = data.offset_float_min - data.lookbehind_float;
- r->float_max_offset = data.offset_float_max;
- if (data.offset_float_max < I32_MAX) /* Don't offset infinity */
- r->float_max_offset -= data.lookbehind_float;
-
- t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FL_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_float, t ? FBMcf_TAIL : 0);
- }
- else {
- remove_float:
- r->float_substr = r->float_utf8 = NULL;
- SvREFCNT_dec(data.longest_float);
- longest_float_length = 0;
- }
-
- /* Note that code very similar to this but for floating string
- is immediately above, changes may need to be made to both.
- Be careful.
- */
- longest_fixed_length = CHR_SVLEN(data.longest_fixed);
- if (longest_fixed_length
- || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE))))
- {
- I32 t,ml;
-
- /* copy the information about the longest fixed
- from the reg_scan_data over to the program. */
- if (SvUTF8(data.longest_fixed)) {
- r->anchored_utf8 = data.longest_fixed;
- r->anchored_substr = NULL;
- } else {
- r->anchored_substr = data.longest_fixed;
- r->anchored_utf8 = NULL;
- }
- /* fixed_end_shift is how many chars that must be matched that
- follow this item. We calculate it ahead of time as once the
- lookbehind offset is added in we lose the ability to correctly
- calculate it.*/
- ml = data.minlen_fixed ? *(data.minlen_fixed)
- : (I32)longest_fixed_length;
- r->anchored_end_shift = ml - data.offset_fixed
- - longest_fixed_length + (SvTAIL(data.longest_fixed) != 0)
- + data.lookbehind_fixed;
- r->anchored_offset = data.offset_fixed - data.lookbehind_fixed;
-
- t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */
- && (!(data.flags & SF_FIX_BEFORE_MEOL)
- || (RExC_flags & RXf_PMf_MULTILINE)));
- fbm_compile(data.longest_fixed, t ? FBMcf_TAIL : 0);
- }
- else {
- r->anchored_substr = r->anchored_utf8 = NULL;
- SvREFCNT_dec(data.longest_fixed);
- longest_fixed_length = 0;
- }
- if (ri->regstclass
- && (OP(ri->regstclass) == REG_ANY || OP(ri->regstclass) == SANY))
- ri->regstclass = NULL;
- if ((!(r->anchored_substr || r->anchored_utf8) || r->anchored_offset)
- && stclass_flag
- && !(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV *sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
-
- /* A temporary algorithm prefers floated substr to fixed one to dig more info. */
- if (longest_fixed_length > longest_float_length) {
- r->check_end_shift = r->anchored_end_shift;
- r->check_substr = r->anchored_substr;
- r->check_utf8 = r->anchored_utf8;
- r->check_offset_min = r->check_offset_max = r->anchored_offset;
- if (r->extflags & RXf_ANCH_SINGLE)
- r->extflags |= RXf_NOSCAN;
- }
- else {
- r->check_end_shift = r->float_end_shift;
- r->check_substr = r->float_substr;
- r->check_utf8 = r->float_utf8;
- r->check_offset_min = r->float_min_offset;
- r->check_offset_max = r->float_max_offset;
- }
- /* XXXX Currently intuiting is not compatible with ANCH_GPOS.
- This should be changed ASAP! */
- if ((r->check_substr || r->check_utf8) && !(r->extflags & RXf_ANCH_GPOS)) {
- r->extflags |= RXf_USE_INTUIT;
- if (SvTAIL(r->check_substr ? r->check_substr : r->check_utf8))
- r->extflags |= RXf_INTUIT_TAIL;
- }
- /* XXX Unneeded? dmq (shouldn't as this is handled elsewhere)
- if ( (STRLEN)minlen < longest_float_length )
- minlen= longest_float_length;
- if ( (STRLEN)minlen < longest_fixed_length )
- minlen= longest_fixed_length;
- */
- }
- else {
- /* Several toplevels. Best we can is to set minlen. */
- I32 fake;
- struct regnode_charclass_class ch_class;
- I32 last_close = 0;
-
- DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "\nMulti Top Level\n"));
-
- scan = ri->program + 1;
- cl_init(pRExC_state, &ch_class);
- data.start_class = &ch_class;
- data.last_closep = &last_close;
-
-
- minlen = study_chunk(pRExC_state, &scan, &minlen, &fake, scan + RExC_size,
- &data, -1, NULL, NULL, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS,0);
-
- CHECK_RESTUDY_GOTO;
-
- r->check_substr = r->check_utf8 = r->anchored_substr = r->anchored_utf8
- = r->float_substr = r->float_utf8 = NULL;
- if (!(data.start_class->flags & ANYOF_EOS)
- && !cl_is_anything(data.start_class))
- {
- const U32 n = add_data(pRExC_state, 1, "f");
-
- Newx(RExC_rxi->data->data[n], 1,
- struct regnode_charclass_class);
- StructCopy(data.start_class,
- (struct regnode_charclass_class*)RExC_rxi->data->data[n],
- struct regnode_charclass_class);
- ri->regstclass = (regnode*)RExC_rxi->data->data[n];
- r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */
- DEBUG_COMPILE_r({ SV* sv = sv_newmortal();
- regprop(r, sv, (regnode*)data.start_class);
- PerlIO_printf(Perl_debug_log,
- "synthetic stclass \"%s\".\n",
- SvPVX_const(sv));});
- }
- }
-
- /* Guard against an embedded (?=) or (?<=) with a longer minlen than
- the "real" pattern. */
- DEBUG_OPTIMISE_r({
- PerlIO_printf(Perl_debug_log,"minlen: %"IVdf" r->minlen:%"IVdf"\n",
- (IV)minlen, (IV)r->minlen);
- });
- r->minlenret = minlen;
- if (r->minlen < minlen)
- r->minlen = minlen;
-
- if (RExC_seen & REG_SEEN_GPOS)
- r->extflags |= RXf_GPOS_SEEN;
- if (RExC_seen & REG_SEEN_LOOKBEHIND)
- r->extflags |= RXf_LOOKBEHIND_SEEN;
- if (RExC_seen & REG_SEEN_EVAL)
- r->extflags |= RXf_EVAL_SEEN;
- if (RExC_seen & REG_SEEN_CANY)
- r->extflags |= RXf_CANY_SEEN;
- if (RExC_seen & REG_SEEN_VERBARG)
- r->intflags |= PREGf_VERBARG_SEEN;
- if (RExC_seen & REG_SEEN_CUTGROUP)
- r->intflags |= PREGf_CUTGROUP_SEEN;
- if (RExC_paren_names)
- RXp_PAREN_NAMES(r) = MUTABLE_HV(SvREFCNT_inc(RExC_paren_names));
- else
- RXp_PAREN_NAMES(r) = NULL;
-
-#ifdef STUPID_PATTERN_CHECKS
- if (RX_PRELEN(rx) == 0)
- r->extflags |= RXf_NULL;
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else if (RX_PRELEN(rx) == 3 && memEQ("\\s+", RX_PRECOMP(rx), 3))
- r->extflags |= RXf_WHITE;
- else if (RX_PRELEN(rx) == 1 && RXp_PRECOMP(rx)[0] == '^')
- r->extflags |= RXf_START_ONLY;
-#else
- if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ')
- /* XXX: this should happen BEFORE we compile */
- r->extflags |= (RXf_SKIPWHITE|RXf_WHITE);
- else {
- regnode *first = ri->program + 1;
- U8 fop = OP(first);
- U8 nop = OP(NEXTOPER(first));
-
- if (PL_regkind[fop] == NOTHING && nop == END)
- r->extflags |= RXf_NULL;
- else if (PL_regkind[fop] == BOL && nop == END)
- r->extflags |= RXf_START_ONLY;
- else if (fop == PLUS && nop ==SPACE && OP(regnext(first))==END)
- r->extflags |= RXf_WHITE;
- }
-#endif
-#ifdef DEBUGGING
- if (RExC_paren_names) {
- ri->name_list_idx = add_data( pRExC_state, 1, "p" );
- ri->data->data[ri->name_list_idx] = (void*)SvREFCNT_inc(RExC_paren_name_list);
- } else
-#endif
- ri->name_list_idx = 0;
-
- if (RExC_recurse_count) {
- for ( ; RExC_recurse_count ; RExC_recurse_count-- ) {
- const regnode *scan = RExC_recurse[RExC_recurse_count-1];
- ARG2L_SET( scan, RExC_open_parens[ARG(scan)-1] - scan );
- }
- }
- Newxz(r->offs, RExC_npar, regexp_paren_pair);
- /* assume we don't need to swap parens around before we match */
-
- DEBUG_DUMP_r({
- PerlIO_printf(Perl_debug_log,"Final program:\n");
- regdump(r);
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- DEBUG_OFFSETS_r(if (ri->u.offsets) {
- const U32 len = ri->u.offsets[0];
- U32 i;
- GET_RE_DEBUG_FLAGS_DECL;
- PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)ri->u.offsets[0]);
- for (i = 1; i <= len; i++) {
- if (ri->u.offsets[i*2-1] || ri->u.offsets[i*2])
- PerlIO_printf(Perl_debug_log, "%"UVuf":%"UVuf"[%"UVuf"] ",
- (UV)i, (UV)ri->u.offsets[i*2-1], (UV)ri->u.offsets[i*2]);
- }
- PerlIO_printf(Perl_debug_log, "\n");
- });
-#endif
- return rx;
-}
-
-#undef RE_ENGINE_PTR
-
-
-SV*
-Perl_reg_named_buff(pTHX_ REGEXP * const rx, SV * const key, SV * const value,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF;
-
- PERL_UNUSED_ARG(value);
-
- if (flags & RXapif_FETCH) {
- return reg_named_buff_fetch(rx, key, flags);
- } else if (flags & (RXapif_STORE | RXapif_DELETE | RXapif_CLEAR)) {
- Perl_croak(aTHX_ "%s", PL_no_modify);
- return NULL;
- } else if (flags & RXapif_EXISTS) {
- return reg_named_buff_exists(rx, key, flags)
- ? &PL_sv_yes
- : &PL_sv_no;
- } else if (flags & RXapif_REGNAMES) {
- return reg_named_buff_all(rx, flags);
- } else if (flags & (RXapif_SCALAR | RXapif_REGNAMES_COUNT)) {
- return reg_named_buff_scalar(rx, flags);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_iter(pTHX_ REGEXP * const rx, const SV * const lastkey,
- const U32 flags)
-{
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ITER;
- PERL_UNUSED_ARG(lastkey);
-
- if (flags & RXapif_FIRSTKEY)
- return reg_named_buff_firstkey(rx, flags);
- else if (flags & RXapif_NEXTKEY)
- return reg_named_buff_nextkey(rx, flags);
- else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_iter", (int)flags);
- return NULL;
- }
-}
-
-SV*
-Perl_reg_named_buff_fetch(pTHX_ REGEXP * const r, SV * const namesv,
- const U32 flags)
-{
- AV *retarray = NULL;
- SV *ret;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FETCH;
-
- if (flags & RXapif_ALL)
- retarray=newAV();
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HE *he_str = hv_fetch_ent( RXp_PAREN_NAMES(rx), namesv, 0, 0 );
- if (he_str) {
- IV i;
- SV* sv_dat=HeVAL(he_str);
- I32 *nums=(I32*)SvPVX(sv_dat);
- for ( i=0; i<SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->nparens) >= nums[i]
- && rx->offs[nums[i]].start != -1
- && rx->offs[nums[i]].end != -1)
- {
- ret = newSVpvs("");
- CALLREG_NUMBUF_FETCH(r,nums[i],ret);
- if (!retarray)
- return ret;
- } else {
- ret = newSVsv(&PL_sv_undef);
- }
- if (retarray)
- av_push(retarray, ret);
- }
- if (retarray)
- return newRV_noinc(MUTABLE_SV(retarray));
- }
- }
- return NULL;
-}
-
-bool
-Perl_reg_named_buff_exists(pTHX_ REGEXP * const r, SV * const key,
- const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_EXISTS;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & RXapif_ALL) {
- return hv_exists_ent(RXp_PAREN_NAMES(rx), key, 0);
- } else {
- SV *sv = CALLREG_NAMED_BUFF_FETCH(r, key, flags);
- if (sv) {
- SvREFCNT_dec(sv);
- return TRUE;
- } else {
- return FALSE;
- }
- }
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_firstkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_FIRSTKEY;
-
- if ( rx && RXp_PAREN_NAMES(rx) ) {
- (void)hv_iterinit(RXp_PAREN_NAMES(rx));
-
- return CALLREG_NAMED_BUFF_NEXTKEY(r, NULL, flags & ~RXapif_FIRSTKEY);
- } else {
- return FALSE;
- }
-}
-
-SV*
-Perl_reg_named_buff_nextkey(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_NEXTKEY;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv = RXp_PAREN_NAMES(rx);
- HE *temphe;
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- return newSVhek(HeKEY_hek(temphe));
- }
- }
- }
- return NULL;
-}
-
-SV*
-Perl_reg_named_buff_scalar(pTHX_ REGEXP * const r, const U32 flags)
-{
- SV *ret;
- AV *av;
- I32 length;
- struct regexp *const rx = (struct regexp *)SvANY(r);
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_SCALAR;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- if (flags & (RXapif_ALL | RXapif_REGNAMES_COUNT)) {
- return newSViv(HvTOTALKEYS(RXp_PAREN_NAMES(rx)));
- } else if (flags & RXapif_ONE) {
- ret = CALLREG_NAMED_BUFF_ALL(r, (flags | RXapif_REGNAMES));
- av = MUTABLE_AV(SvRV(ret));
- length = av_len(av);
- SvREFCNT_dec(ret);
- return newSViv(length + 1);
- } else {
- Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_scalar", (int)flags);
- return NULL;
- }
- }
- return &PL_sv_undef;
-}
-
-SV*
-Perl_reg_named_buff_all(pTHX_ REGEXP * const r, const U32 flags)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- AV *av = newAV();
-
- PERL_ARGS_ASSERT_REG_NAMED_BUFF_ALL;
-
- if (rx && RXp_PAREN_NAMES(rx)) {
- HV *hv= RXp_PAREN_NAMES(rx);
- HE *temphe;
- (void)hv_iterinit(hv);
- while ( (temphe = hv_iternext_flags(hv,0)) ) {
- IV i;
- IV parno = 0;
- SV* sv_dat = HeVAL(temphe);
- I32 *nums = (I32*)SvPVX(sv_dat);
- for ( i = 0; i < SvIVX(sv_dat); i++ ) {
- if ((I32)(rx->lastparen) >= nums[i] &&
- rx->offs[nums[i]].start != -1 &&
- rx->offs[nums[i]].end != -1)
- {
- parno = nums[i];
- break;
- }
- }
- if (parno || flags & RXapif_ALL) {
- av_push(av, newSVhek(HeKEY_hek(temphe)));
- }
- }
- }
-
- return newRV_noinc(MUTABLE_SV(av));
-}
-
-void
-Perl_reg_numbered_buff_fetch(pTHX_ REGEXP * const r, const I32 paren,
- SV * const sv)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- char *s = NULL;
- I32 i = 0;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_FETCH;
-
- if (!rx->subbeg) {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- else
- if (paren == RX_BUFF_IDX_PREMATCH && rx->offs[0].start != -1) {
- /* $` */
- i = rx->offs[0].start;
- s = rx->subbeg;
- }
- else
- if (paren == RX_BUFF_IDX_POSTMATCH && rx->offs[0].end != -1) {
- /* $' */
- s = rx->subbeg + rx->offs[0].end;
- i = rx->sublen - rx->offs[0].end;
- }
- else
- if ( 0 <= paren && paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- /* $& $1 ... */
- i = t1 - s1;
- s = rx->subbeg + s1;
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
- assert(rx->sublen >= (s - rx->subbeg) + i );
- if (i >= 0) {
- const int oldtainted = PL_tainted;
- TAINT_NOT;
- sv_setpvn(sv, s, i);
- PL_tainted = oldtainted;
- if ( (rx->extflags & RXf_CANY_SEEN)
- ? (RXp_MATCH_UTF8(rx)
- && (!i || is_utf8_string((U8*)s, i)))
- : (RXp_MATCH_UTF8(rx)) )
- {
- SvUTF8_on(sv);
- }
- else
- SvUTF8_off(sv);
- if (PL_tainting) {
- if (RXp_MATCH_TAINTED(rx)) {
- if (SvTYPE(sv) >= SVt_PVMG) {
- MAGIC* const mg = SvMAGIC(sv);
- MAGIC* mgt;
- PL_tainted = 1;
- SvMAGIC_set(sv, mg->mg_moremagic);
- SvTAINT(sv);
- if ((mgt = SvMAGIC(sv))) {
- mg->mg_moremagic = mgt;
- SvMAGIC_set(sv, mg);
- }
- } else {
- PL_tainted = 1;
- SvTAINT(sv);
- }
- } else
- SvTAINTED_off(sv);
- }
- } else {
- sv_setsv(sv,&PL_sv_undef);
- return;
- }
-}
-
-void
-Perl_reg_numbered_buff_store(pTHX_ REGEXP * const rx, const I32 paren,
- SV const * const value)
-{
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_STORE;
-
- PERL_UNUSED_ARG(rx);
- PERL_UNUSED_ARG(paren);
- PERL_UNUSED_ARG(value);
-
- if (!PL_localizing)
- Perl_croak(aTHX_ "%s", PL_no_modify);
-}
-
-I32
-Perl_reg_numbered_buff_length(pTHX_ REGEXP * const r, const SV * const sv,
- const I32 paren)
-{
- struct regexp *const rx = (struct regexp *)SvANY(r);
- I32 i;
- I32 s1, t1;
-
- PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_LENGTH;
-
- /* Some of this code was originally in C<Perl_magic_len> in F<mg.c> */
- switch (paren) {
- /* $` / ${^PREMATCH} */
- case RX_BUFF_IDX_PREMATCH:
- if (rx->offs[0].start != -1) {
- i = rx->offs[0].start;
- if (i > 0) {
- s1 = 0;
- t1 = i;
- goto getlen;
- }
- }
- return 0;
- /* $' / ${^POSTMATCH} */
- case RX_BUFF_IDX_POSTMATCH:
- if (rx->offs[0].end != -1) {
- i = rx->sublen - rx->offs[0].end;
- if (i > 0) {
- s1 = rx->offs[0].end;
- t1 = rx->sublen;
- goto getlen;
- }
- }
- return 0;
- /* $& / ${^MATCH}, $1, $2, ... */
- default:
- if (paren <= (I32)rx->nparens &&
- (s1 = rx->offs[paren].start) != -1 &&
- (t1 = rx->offs[paren].end) != -1)
- {
- i = t1 - s1;
- goto getlen;
- } else {
- if (ckWARN(WARN_UNINITIALIZED))
- report_uninit((const SV *)sv);
- return 0;
- }
- }
- getlen:
- if (i > 0 && RXp_MATCH_UTF8(rx)) {
- const char * const s = rx->subbeg + s1;
- const U8 *ep;
- STRLEN el;
-
- i = t1 - s1;
- if (is_utf8_string_loclen((U8*)s, i, &ep, &el))
- i = el;
- }
- return i;
-}
-
-SV*
-Perl_reg_qr_package(pTHX_ REGEXP * const rx)
-{
- PERL_ARGS_ASSERT_REG_QR_PACKAGE;
- PERL_UNUSED_ARG(rx);
- if (0)
- return NULL;
- else
- return newSVpvs("Regexp");
-}
-
-/* Scans the name of a named buffer from the pattern.
- * If flags is REG_RSN_RETURN_NULL returns null.
- * If flags is REG_RSN_RETURN_NAME returns an SV* containing the name
- * If flags is REG_RSN_RETURN_DATA returns the data SV* corresponding
- * to the parsed name as looked up in the RExC_paren_names hash.
- * If there is an error throws a vFAIL().. type exception.
- */
-
-#define REG_RSN_RETURN_NULL 0
-#define REG_RSN_RETURN_NAME 1
-#define REG_RSN_RETURN_DATA 2
-
-STATIC SV*
-S_reg_scan_name(pTHX_ RExC_state_t *pRExC_state, U32 flags)
-{
- char *name_start = RExC_parse;
-
- PERL_ARGS_ASSERT_REG_SCAN_NAME;
-
- if (isIDFIRST_lazy_if(RExC_parse, UTF)) {
- /* skip IDFIRST by using do...while */
- if (UTF)
- do {
- RExC_parse += UTF8SKIP(RExC_parse);
- } while (isALNUM_utf8((U8*)RExC_parse));
- else
- do {
- RExC_parse++;
- } while (isALNUM(*RExC_parse));
- }
-
- if ( flags ) {
- SV* sv_name
- = newSVpvn_flags(name_start, (int)(RExC_parse - name_start),
- SVs_TEMP | (UTF ? SVf_UTF8 : 0));
- if ( flags == REG_RSN_RETURN_NAME)
- return sv_name;
- else if (flags==REG_RSN_RETURN_DATA) {
- HE *he_str = NULL;
- SV *sv_dat = NULL;
- if ( ! sv_name ) /* should not happen*/
- Perl_croak(aTHX_ "panic: no svname in reg_scan_name");
- if (RExC_paren_names)
- he_str = hv_fetch_ent( RExC_paren_names, sv_name, 0, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat )
- vFAIL("Reference to nonexistent named group");
- return sv_dat;
- }
- else {
- Perl_croak(aTHX_ "panic: bad flag in reg_scan_name");
- }
- /* NOT REACHED */
- }
- return NULL;
-}
-
-#define DEBUG_PARSE_MSG(funcname) DEBUG_PARSE_r({ \
- int rem=(int)(RExC_end - RExC_parse); \
- int cut; \
- int num; \
- int iscut=0; \
- if (rem>10) { \
- rem=10; \
- iscut=1; \
- } \
- cut=10-rem; \
- if (RExC_lastparse!=RExC_parse) \
- PerlIO_printf(Perl_debug_log," >%.*s%-*s", \
- rem, RExC_parse, \
- cut + 4, \
- iscut ? "..." : "<" \
- ); \
- else \
- PerlIO_printf(Perl_debug_log,"%16s",""); \
- \
- if (SIZE_ONLY) \
- num = RExC_size + 1; \
- else \
- num=REG_NODE_NUM(RExC_emit); \
- if (RExC_lastnum!=num) \
- PerlIO_printf(Perl_debug_log,"|%4d",num); \
- else \
- PerlIO_printf(Perl_debug_log,"|%4s",""); \
- PerlIO_printf(Perl_debug_log,"|%*s%-4s", \
- (int)((depth*2)), "", \
- (funcname) \
- ); \
- RExC_lastnum=num; \
- RExC_lastparse=RExC_parse; \
-})
-
-
-
-#define DEBUG_PARSE(funcname) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,"%4s","\n"); \
-})
-#define DEBUG_PARSE_FMT(funcname,fmt,args) DEBUG_PARSE_r({ \
- DEBUG_PARSE_MSG((funcname)); \
- PerlIO_printf(Perl_debug_log,fmt "\n",args); \
-})
-/*
- - reg - regular expression, i.e. main body or parenthesized thing
- *
- * Caller must absorb opening parenthesis.
- *
- * Combining parenthesis handling with the base level of regular expression
- * is a trifle forced, but the need to tie the tails of the branches to what
- * follows makes it hard to avoid.
- */
-#define REGTAIL(x,y,z) regtail((x),(y),(z),depth+1)
-#ifdef DEBUGGING
-#define REGTAIL_STUDY(x,y,z) regtail_study((x),(y),(z),depth+1)
-#else
-#define REGTAIL_STUDY(x,y,z) regtail((x),(y),(z),depth+1)
-#endif
-
-STATIC regnode *
-S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth)
- /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */
-{
- dVAR;
- register regnode *ret; /* Will be the head of the group. */
- register regnode *br;
- register regnode *lastbr;
- register regnode *ender = NULL;
- register I32 parno = 0;
- I32 flags;
- U32 oregflags = RExC_flags;
- bool have_branch = 0;
- bool is_open = 0;
- I32 freeze_paren = 0;
- I32 after_freeze = 0;
-
- /* for (?g), (?gc), and (?o) warnings; warning
- about (?c) will warn about (?g) -- japhy */
-
-#define WASTED_O 0x01
-#define WASTED_G 0x02
-#define WASTED_C 0x04
-#define WASTED_GC (0x02|0x04)
- I32 wastedflags = 0x00;
-
- char * parse_start = RExC_parse; /* MJD */
- char * const oregcomp_parse = RExC_parse;
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG;
- DEBUG_PARSE("reg ");
-
- *flagp = 0; /* Tentatively. */
-
-
- /* Make an OPEN node, if parenthesized. */
- if (paren) {
- if ( *RExC_parse == '*') { /* (*VERB:ARG) */
- char *start_verb = RExC_parse;
- STRLEN verb_len = 0;
- char *start_arg = NULL;
- unsigned char op = 0;
- int argok = 1;
- int internal_argval = 0; /* internal_argval is only useful if !argok */
- while ( *RExC_parse && *RExC_parse != ')' ) {
- if ( *RExC_parse == ':' ) {
- start_arg = RExC_parse + 1;
- break;
- }
- RExC_parse++;
- }
- ++start_verb;
- verb_len = RExC_parse - start_verb;
- if ( start_arg ) {
- RExC_parse++;
- while ( *RExC_parse && *RExC_parse != ')' )
- RExC_parse++;
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern argument");
- if ( RExC_parse == start_arg )
- start_arg = NULL;
- } else {
- if ( *RExC_parse != ')' )
- vFAIL("Unterminated verb pattern");
- }
-
- switch ( *start_verb ) {
- case 'A': /* (*ACCEPT) */
- if ( memEQs(start_verb,verb_len,"ACCEPT") ) {
- op = ACCEPT;
- internal_argval = RExC_nestroot;
- }
- break;
- case 'C': /* (*COMMIT) */
- if ( memEQs(start_verb,verb_len,"COMMIT") )
- op = COMMIT;
- break;
- case 'F': /* (*FAIL) */
- if ( verb_len==1 || memEQs(start_verb,verb_len,"FAIL") ) {
- op = OPFAIL;
- argok = 0;
- }
- break;
- case ':': /* (*:NAME) */
- case 'M': /* (*MARK:NAME) */
- if ( verb_len==0 || memEQs(start_verb,verb_len,"MARK") ) {
- op = MARKPOINT;
- argok = -1;
- }
- break;
- case 'P': /* (*PRUNE) */
- if ( memEQs(start_verb,verb_len,"PRUNE") )
- op = PRUNE;
- break;
- case 'S': /* (*SKIP) */
- if ( memEQs(start_verb,verb_len,"SKIP") )
- op = SKIP;
- break;
- case 'T': /* (*THEN) */
- /* [19:06] <TimToady> :: is then */
- if ( memEQs(start_verb,verb_len,"THEN") ) {
- op = CUTGROUP;
- RExC_seen |= REG_SEEN_CUTGROUP;
- }
- break;
- }
- if ( ! op ) {
- RExC_parse++;
- vFAIL3("Unknown verb pattern '%.*s'",
- verb_len, start_verb);
- }
- if ( argok ) {
- if ( start_arg && internal_argval ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else if ( argok < 0 && !start_arg ) {
- vFAIL3("Verb pattern '%.*s' has a mandatory argument",
- verb_len, start_verb);
- } else {
- ret = reganode(pRExC_state, op, internal_argval);
- if ( ! internal_argval && ! SIZE_ONLY ) {
- if (start_arg) {
- SV *sv = newSVpvn( start_arg, RExC_parse - start_arg);
- ARG(ret) = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[ARG(ret)]=(void*)sv;
- ret->flags = 0;
- } else {
- ret->flags = 1;
- }
- }
- }
- if (!internal_argval)
- RExC_seen |= REG_SEEN_VERBARG;
- } else if ( start_arg ) {
- vFAIL3("Verb pattern '%.*s' may not have an argument",
- verb_len, start_verb);
- } else {
- ret = reg_node(pRExC_state, op);
- }
- nextchar(pRExC_state);
- return ret;
- } else
- if (*RExC_parse == '?') { /* (?...) */
- bool is_logical = 0;
- const char * const seqstart = RExC_parse;
-
- RExC_parse++;
- paren = *RExC_parse++;
- ret = NULL; /* For look-ahead/behind. */
- switch (paren) {
-
- case 'P': /* (?P...) variants for those used to PCRE/Python */
- paren = *RExC_parse++;
- if ( paren == '<') /* (?P<...>) named capture */
- goto named_capture;
- else if (paren == '>') { /* (?P>name) named recursion */
- goto named_recursion;
- }
- else if (paren == '=') { /* (?P=...) named backref */
- /* this pretty much dupes the code for \k<NAME> in regatom(), if
- you change this make sure you change that */
- char* name_start = RExC_parse;
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ')')
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
-
- nextchar(pRExC_state);
- return ret;
- }
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- case '<': /* (?<...) */
- if (*RExC_parse == '!')
- paren = ',';
- else if (*RExC_parse != '=')
- named_capture:
- { /* (?<...>) */
- char *name_start;
- SV *svname;
- paren= '>';
- case '\'': /* (?'...') */
- name_start= RExC_parse;
- svname = reg_scan_name(pRExC_state,
- SIZE_ONLY ? /* reverse test from the others */
- REG_RSN_RETURN_NAME :
- REG_RSN_RETURN_NULL);
- if (RExC_parse == name_start) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- if (*RExC_parse != paren)
- vFAIL2("Sequence (?%c... not terminated",
- paren=='>' ? '<' : paren);
- if (SIZE_ONLY) {
- HE *he_str;
- SV *sv_dat = NULL;
- if (!svname) /* shouldnt happen */
- Perl_croak(aTHX_
- "panic: reg_scan_name returned NULL");
- if (!RExC_paren_names) {
- RExC_paren_names= newHV();
- sv_2mortal(MUTABLE_SV(RExC_paren_names));
-#ifdef DEBUGGING
- RExC_paren_name_list= newAV();
- sv_2mortal(MUTABLE_SV(RExC_paren_name_list));
-#endif
- }
- he_str = hv_fetch_ent( RExC_paren_names, svname, 1, 0 );
- if ( he_str )
- sv_dat = HeVAL(he_str);
- if ( ! sv_dat ) {
- /* croak baby croak */
- Perl_croak(aTHX_
- "panic: paren_name hash element allocation failed");
- } else if ( SvPOK(sv_dat) ) {
- /* (?|...) can mean we have dupes so scan to check
- its already been stored. Maybe a flag indicating
- we are inside such a construct would be useful,
- but the arrays are likely to be quite small, so
- for now we punt -- dmq */
- IV count = SvIV(sv_dat);
- I32 *pv = (I32*)SvPVX(sv_dat);
- IV i;
- for ( i = 0 ; i < count ; i++ ) {
- if ( pv[i] == RExC_npar ) {
- count = 0;
- break;
- }
- }
- if ( count ) {
- pv = (I32*)SvGROW(sv_dat, SvCUR(sv_dat) + sizeof(I32)+1);
- SvCUR_set(sv_dat, SvCUR(sv_dat) + sizeof(I32));
- pv[count] = RExC_npar;
- SvIV_set(sv_dat, SvIVX(sv_dat) + 1);
- }
- } else {
- (void)SvUPGRADE(sv_dat,SVt_PVNV);
- sv_setpvn(sv_dat, (char *)&(RExC_npar), sizeof(I32));
- SvIOK_on(sv_dat);
- SvIV_set(sv_dat, 1);
- }
-#ifdef DEBUGGING
- if (!av_store(RExC_paren_name_list, RExC_npar, SvREFCNT_inc(svname)))
- SvREFCNT_dec(svname);
-#endif
-
- /*sv_dump(sv_dat);*/
- }
- nextchar(pRExC_state);
- paren = 1;
- goto capturing_parens;
- }
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- RExC_parse++;
- case '=': /* (?=...) */
- RExC_seen_zerolen++;
- break;
- case '!': /* (?!...) */
- RExC_seen_zerolen++;
- if (*RExC_parse == ')') {
- ret=reg_node(pRExC_state, OPFAIL);
- nextchar(pRExC_state);
- return ret;
- }
- break;
- case '|': /* (?|...) */
- /* branch reset, behave like a (?:...) except that
- buffers in alternations share the same numbers */
- paren = ':';
- after_freeze = freeze_paren = RExC_npar;
- break;
- case ':': /* (?:...) */
- case '>': /* (?>...) */
- break;
- case '$': /* (?$...) */
- case '@': /* (?@...) */
- vFAIL2("Sequence (?%c...) not implemented", (int)paren);
- break;
- case '#': /* (?#...) */
- while (*RExC_parse && *RExC_parse != ')')
- RExC_parse++;
- if (*RExC_parse != ')')
- FAIL("Sequence (?#... not terminated");
- nextchar(pRExC_state);
- *flagp = TRYAGAIN;
- return NULL;
- case '0' : /* (?0) */
- case 'R' : /* (?R) */
- if (*RExC_parse != ')')
- FAIL("Sequence (?R) not terminated");
- ret = reg_node(pRExC_state, GOSTART);
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- /*notreached*/
- { /* named and numeric backreferences */
- I32 num;
- case '&': /* (?&NAME) */
- parse_start = RExC_parse - 1;
- named_recursion:
- {
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- num = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- goto gen_recurse_regop;
- /* NOT REACHED */
- case '+':
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse++;
- vFAIL("Illegal pattern");
- }
- goto parse_recursion;
- /* NOT REACHED*/
- case '-': /* (?-1) */
- if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) {
- RExC_parse--; /* rewind to let it be handled later */
- goto parse_flags;
- }
- /*FALLTHROUGH */
- case '1': case '2': case '3': case '4': /* (?1) */
- case '5': case '6': case '7': case '8': case '9':
- RExC_parse--;
- parse_recursion:
- num = atoi(RExC_parse);
- parse_start = RExC_parse - 1; /* MJD */
- if (*RExC_parse == '-')
- RExC_parse++;
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (*RExC_parse!=')')
- vFAIL("Expecting close bracket");
-
- gen_recurse_regop:
- if ( paren == '-' ) {
- /*
- Diagram of capture buffer numbering.
- Top line is the normal capture buffer numbers
- Botton line is the negative indexing as from
- the X (the (?-2))
-
- + 1 2 3 4 5 X 6 7
- /(a(x)y)(a(b(c(?-2)d)e)f)(g(h))/
- - 5 4 3 2 1 X x x
-
- */
- num = RExC_npar + num;
- if (num < 1) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- } else if ( paren == '+' ) {
- num = RExC_npar + num - 1;
- }
-
- ret = reganode(pRExC_state, GOSUB, num);
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens) {
- RExC_parse++;
- vFAIL("Reference to nonexistent group");
- }
- ARG2L_SET( ret, RExC_recurse_count++);
- RExC_emit++;
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Recurse #%"UVuf" to %"IVdf"\n", (UV)ARG(ret), (IV)ARG2L(ret)));
- } else {
- RExC_size++;
- }
- RExC_seen |= REG_SEEN_RECURSE;
- Set_Node_Length(ret, 1 + regarglen[OP(ret)]); /* MJD */
- Set_Node_Offset(ret, parse_start); /* MJD */
-
- *flagp |= POSTPONED;
- nextchar(pRExC_state);
- return ret;
- } /* named and numeric backreferences */
- /* NOT REACHED */
-
- case '?': /* (??...) */
- is_logical = 1;
- if (*RExC_parse != '{') {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- *flagp |= POSTPONED;
- paren = *RExC_parse++;
- /* FALL THROUGH */
- case '{': /* (?{...}) */
- {
- I32 count = 1;
- U32 n = 0;
- char c;
- char *s = RExC_parse;
-
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_EVAL;
- while (count && (c = *RExC_parse)) {
- if (c == '\\') {
- if (RExC_parse[1])
- RExC_parse++;
- }
- else if (c == '{')
- count++;
- else if (c == '}')
- count--;
- RExC_parse++;
- }
- if (*RExC_parse != ')') {
- RExC_parse = s;
- vFAIL("Sequence (?{...}) not terminated or not {}-balanced");
- }
- if (!SIZE_ONLY) {
- PAD *pad;
- OP_4tree *sop, *rop;
- SV * const sv = newSVpvn(s, RExC_parse - 1 - s);
-
- ENTER;
- Perl_save_re_context(aTHX);
- rop = sv_compile_2op(sv, &sop, "re", &pad);
- sop->op_private |= OPpREFCOUNTED;
- /* re_dup will OpREFCNT_inc */
- OpREFCNT_set(sop, 1);
- LEAVE;
-
- n = add_data(pRExC_state, 3, "nop");
- RExC_rxi->data->data[n] = (void*)rop;
- RExC_rxi->data->data[n+1] = (void*)sop;
- RExC_rxi->data->data[n+2] = (void*)pad;
- SvREFCNT_dec(sv);
- }
- else { /* First pass */
- if (PL_reginterp_cnt < ++RExC_seen_evals
- && IN_PERL_RUNTIME)
- /* No compiled RE interpolated, has runtime
- components ===> unsafe. */
- FAIL("Eval-group not allowed at runtime, use re 'eval'");
- if (PL_tainting && PL_tainted)
- FAIL("Eval-group in insecure regular expression");
-#if PERL_VERSION > 8
- if (IN_PERL_COMPILETIME)
- PL_cv_has_eval = 1;
-#endif
- }
-
- nextchar(pRExC_state);
- if (is_logical) {
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 2;
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, EVAL, n));
- /* deal with the length of this later - MJD */
- return ret;
- }
- ret = reganode(pRExC_state, EVAL, n);
- Set_Node_Length(ret, RExC_parse - parse_start + 1);
- Set_Node_Offset(ret, parse_start);
- return ret;
- }
- case '(': /* (?(?{...})...) and (?(?=...)...) */
- {
- int is_define= 0;
- if (RExC_parse[0] == '?') { /* (?(?...)) */
- if (RExC_parse[1] == '=' || RExC_parse[1] == '!'
- || RExC_parse[1] == '<'
- || RExC_parse[1] == '{') { /* Lookahead or eval. */
- I32 flag;
-
- ret = reg_node(pRExC_state, LOGICAL);
- if (!SIZE_ONLY)
- ret->flags = 1;
- REGTAIL(pRExC_state, ret, reg(pRExC_state, 1, &flag,depth+1));
- goto insert_if;
- }
- }
- else if ( RExC_parse[0] == '<' /* (?(<NAME>)...) */
- || RExC_parse[0] == '\'' ) /* (?('NAME')...) */
- {
- char ch = RExC_parse[0] == '<' ? '>' : '\'';
- char *name_start= RExC_parse++;
- U32 num = 0;
- SV *sv_dat=reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence (?(%c... not terminated",
- (ch == '>' ? '<' : ch));
- RExC_parse++;
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
- ret = reganode(pRExC_state,NGROUPP,num);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'D' &&
- RExC_parse[1] == 'E' &&
- RExC_parse[2] == 'F' &&
- RExC_parse[3] == 'I' &&
- RExC_parse[4] == 'N' &&
- RExC_parse[5] == 'E')
- {
- ret = reganode(pRExC_state,DEFINEP,0);
- RExC_parse +=6 ;
- is_define = 1;
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] == 'R') {
- RExC_parse++;
- parno = 0;
- if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- parno = atoi(RExC_parse++);
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- } else if (RExC_parse[0] == '&') {
- SV *sv_dat;
- RExC_parse++;
- sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- parno = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0;
- }
- ret = reganode(pRExC_state,INSUBP,parno);
- goto insert_if_check_paren;
- }
- else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
- /* (?(1)...) */
- char c;
- parno = atoi(RExC_parse++);
-
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- ret = reganode(pRExC_state, GROUPP, parno);
-
- insert_if_check_paren:
- if ((c = *nextchar(pRExC_state)) != ')')
- vFAIL("Switch condition not recognized");
- insert_if:
- REGTAIL(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0));
- br = regbranch(pRExC_state, &flags, 1,depth+1);
- if (br == NULL)
- br = reganode(pRExC_state, LONGJMP, 0);
- else
- REGTAIL(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0));
- c = *nextchar(pRExC_state);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- if (c == '|') {
- if (is_define)
- vFAIL("(?(DEFINE)....) does not allow branches");
- lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */
- regbranch(pRExC_state, &flags, 1,depth+1);
- REGTAIL(pRExC_state, ret, lastbr);
- if (flags&HASWIDTH)
- *flagp |= HASWIDTH;
- c = *nextchar(pRExC_state);
- }
- else
- lastbr = NULL;
- if (c != ')')
- vFAIL("Switch (?(condition)... contains too many branches");
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, br, ender);
- if (lastbr) {
- REGTAIL(pRExC_state, lastbr, ender);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender);
- }
- else
- REGTAIL(pRExC_state, ret, ender);
- RExC_size++; /* XXX WHY do we need this?!!
- For large programs it seems to be required
- but I can't figure out why. -- dmq*/
- return ret;
- }
- else {
- vFAIL2("Unknown switch condition (?(%.2s", RExC_parse);
- }
- }
- case 0:
- RExC_parse--; /* for vFAIL to print correctly */
- vFAIL("Sequence (? incomplete");
- break;
- default:
- --RExC_parse;
- parse_flags: /* (?i) */
- {
- U32 posflags = 0, negflags = 0;
- U32 *flagsp = &posflags;
-
- while (*RExC_parse) {
- /* && strchr("iogcmsx", *RExC_parse) */
- /* (?g), (?gc) and (?o) are useless here
- and must be globally applied -- japhy */
- switch (*RExC_parse) {
- CASE_STD_PMMOD_FLAGS_PARSE_SET(flagsp);
- case ONCE_PAT_MOD: /* 'o' */
- case GLOBAL_PAT_MOD: /* 'g' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- const I32 wflagbit = *RExC_parse == 'o' ? WASTED_O : WASTED_G;
- if (! (wastedflags & wflagbit) ) {
- wastedflags |= wflagbit;
- vWARN5(
- RExC_parse + 1,
- "Useless (%s%c) - %suse /%c modifier",
- flagsp == &negflags ? "?-" : "?",
- *RExC_parse,
- flagsp == &negflags ? "don't " : "",
- *RExC_parse
- );
- }
- }
- break;
-
- case CONTINUE_PAT_MOD: /* 'c' */
- if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
- if (! (wastedflags & WASTED_C) ) {
- wastedflags |= WASTED_GC;
- vWARN3(
- RExC_parse + 1,
- "Useless (%sc) - %suse /gc modifier",
- flagsp == &negflags ? "?-" : "?",
- flagsp == &negflags ? "don't " : ""
- );
- }
- }
- break;
- case KEEPCOPY_PAT_MOD: /* 'p' */
- if (flagsp == &negflags) {
- if (SIZE_ONLY)
- ckWARNreg(RExC_parse + 1,"Useless use of (?-p)");
- } else {
- *flagsp |= RXf_PMf_KEEPCOPY;
- }
- break;
- case '-':
- if (flagsp == &negflags) {
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- flagsp = &negflags;
- wastedflags = 0; /* reset so (?g-c) warns twice */
- break;
- case ':':
- paren = ':';
- /*FALLTHROUGH*/
- case ')':
- RExC_flags |= posflags;
- RExC_flags &= ~negflags;
- if (paren != ':') {
- oregflags |= posflags;
- oregflags &= ~negflags;
- }
- nextchar(pRExC_state);
- if (paren != ':') {
- *flagp = TRYAGAIN;
- return NULL;
- } else {
- ret = NULL;
- goto parse_rest;
- }
- /*NOTREACHED*/
- default:
- RExC_parse++;
- vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
- /*NOTREACHED*/
- }
- ++RExC_parse;
- }
- }} /* one for the default block, one for the switch */
- }
- else { /* (...) */
- capturing_parens:
- parno = RExC_npar;
- RExC_npar++;
-
- ret = reganode(pRExC_state, OPEN, parno);
- if (!SIZE_ONLY ){
- if (!RExC_nestroot)
- RExC_nestroot = parno;
- if (RExC_seen & REG_SEEN_RECURSE
- && !RExC_open_parens[parno-1])
- {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting open paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ret)));
- RExC_open_parens[parno-1]= ret;
- }
- }
- Set_Node_Length(ret, 1); /* MJD */
- Set_Node_Offset(ret, RExC_parse); /* MJD */
- is_open = 1;
- }
- }
- else /* ! paren */
- ret = NULL;
-
- parse_rest:
- /* Pick up the branches, linking them together. */
- parse_start = RExC_parse; /* MJD */
- br = regbranch(pRExC_state, &flags, 1,depth+1);
-
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
-
- /* branch_len = (paren != 0); */
-
- if (br == NULL)
- return(NULL);
- if (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, BRANCHJ, br, depth+1);
- }
- else { /* MJD */
- reginsert(pRExC_state, BRANCH, br, depth+1);
- Set_Node_Length(br, paren != 0);
- Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start);
- }
- have_branch = 1;
- if (SIZE_ONLY)
- RExC_extralen += 1; /* For BRANCHJ-BRANCH. */
- }
- else if (paren == ':') {
- *flagp |= flags&SIMPLE;
- }
- if (is_open) { /* Starts with OPEN. */
- REGTAIL(pRExC_state, ret, br); /* OPEN -> first. */
- }
- else if (paren != '?') /* Not Conditional */
- ret = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- lastbr = br;
- while (*RExC_parse == '|') {
- if (!SIZE_ONLY && RExC_extralen) {
- ender = reganode(pRExC_state, LONGJMP,0);
- REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */
- }
- if (SIZE_ONLY)
- RExC_extralen += 2; /* Account for LONGJMP. */
- nextchar(pRExC_state);
- if (freeze_paren) {
- if (RExC_npar > after_freeze)
- after_freeze = RExC_npar;
- RExC_npar = freeze_paren;
- }
- br = regbranch(pRExC_state, &flags, 0, depth+1);
-
- if (br == NULL)
- return(NULL);
- REGTAIL(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */
- lastbr = br;
- *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED);
- }
-
- if (have_branch || paren != ':') {
- /* Make a closing node, and hook it on the end. */
- switch (paren) {
- case ':':
- ender = reg_node(pRExC_state, TAIL);
- break;
- case 1:
- ender = reganode(pRExC_state, CLOSE, parno);
- if (!SIZE_ONLY && RExC_seen & REG_SEEN_RECURSE) {
- DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log,
- "Setting close paren #%"IVdf" to %d\n",
- (IV)parno, REG_NODE_NUM(ender)));
- RExC_close_parens[parno-1]= ender;
- if (RExC_nestroot == parno)
- RExC_nestroot = 0;
- }
- Set_Node_Offset(ender,RExC_parse+1); /* MJD */
- Set_Node_Length(ender,1); /* MJD */
- break;
- case '<':
- case ',':
- case '=':
- case '!':
- *flagp &= ~HASWIDTH;
- /* FALL THROUGH */
- case '>':
- ender = reg_node(pRExC_state, SUCCEED);
- break;
- case 0:
- ender = reg_node(pRExC_state, END);
- if (!SIZE_ONLY) {
- assert(!RExC_opend); /* there can only be one! */
- RExC_opend = ender;
- }
- break;
- }
- REGTAIL(pRExC_state, lastbr, ender);
-
- if (have_branch && !SIZE_ONLY) {
- if (depth==1)
- RExC_seen |= REG_TOP_LEVEL_BRANCHES;
-
- /* Hook the tails of the branches to the closing node. */
- for (br = ret; br; br = regnext(br)) {
- const U8 op = PL_regkind[OP(br)];
- if (op == BRANCH) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(br), ender);
- }
- else if (op == BRANCHJ) {
- REGTAIL_STUDY(pRExC_state, NEXTOPER(NEXTOPER(br)), ender);
- }
- }
- }
- }
-
- {
- const char *p;
- static const char parens[] = "=!<,>";
-
- if (paren && (p = strchr(parens, paren))) {
- U8 node = ((p - parens) % 2) ? UNLESSM : IFMATCH;
- int flag = (p - parens) > 1;
-
- if (paren == '>')
- node = SUSPEND, flag = 0;
- reginsert(pRExC_state, node,ret, depth+1);
- Set_Node_Cur_Length(ret);
- Set_Node_Offset(ret, parse_start + 1);
- ret->flags = flag;
- REGTAIL_STUDY(pRExC_state, ret, reg_node(pRExC_state, TAIL));
- }
- }
-
- /* Check for proper termination. */
- if (paren) {
- RExC_flags = oregflags;
- if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched (");
- }
- }
- else if (!paren && RExC_parse < RExC_end) {
- if (*RExC_parse == ')') {
- RExC_parse++;
- vFAIL("Unmatched )");
- }
- else
- FAIL("Junk on end of regexp"); /* "Can't happen". */
- /* NOTREACHED */
- }
- if (after_freeze)
- RExC_npar = after_freeze;
- return(ret);
-}
-
-/*
- - regbranch - one alternative of an | operator
- *
- * Implements the concatenation operator.
- */
-STATIC regnode *
-S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register regnode *chain = NULL;
- register regnode *latest;
- I32 flags = 0, c = 0;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGBRANCH;
-
- DEBUG_PARSE("brnc");
-
- if (first)
- ret = NULL;
- else {
- if (!SIZE_ONLY && RExC_extralen)
- ret = reganode(pRExC_state, BRANCHJ,0);
- else {
- ret = reg_node(pRExC_state, BRANCH);
- Set_Node_Length(ret, 1);
- }
- }
-
- if (!first && SIZE_ONLY)
- RExC_extralen += 1; /* BRANCHJ */
-
- *flagp = WORST; /* Tentatively. */
-
- RExC_parse--;
- nextchar(pRExC_state);
- while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') {
- flags &= ~TRYAGAIN;
- latest = regpiece(pRExC_state, &flags,depth+1);
- if (latest == NULL) {
- if (flags & TRYAGAIN)
- continue;
- return(NULL);
- }
- else if (ret == NULL)
- ret = latest;
- *flagp |= flags&(HASWIDTH|POSTPONED);
- if (chain == NULL) /* First piece. */
- *flagp |= flags&SPSTART;
- else {
- RExC_naughty++;
- REGTAIL(pRExC_state, chain, latest);
- }
- chain = latest;
- c++;
- }
- if (chain == NULL) { /* Loop ran zero times. */
- chain = reg_node(pRExC_state, NOTHING);
- if (ret == NULL)
- ret = chain;
- }
- if (c == 1) {
- *flagp |= flags&SIMPLE;
- }
-
- return ret;
-}
-
-/*
- - regpiece - something followed by possible [*+?]
- *
- * Note that the branching code sequences used for ? and the general cases
- * of * and + are somewhat optimized: they use the same NOTHING node as
- * both the endmarker for their branch list and the body of the last branch.
- * It might seem that this node could be dispensed with entirely, but the
- * endmarker role is not redundant.
- */
-STATIC regnode *
-S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret;
- register char op;
- register char *next;
- I32 flags;
- const char * const origparse = RExC_parse;
- I32 min;
- I32 max = REG_INFTY;
- char *parse_start;
- const char *maxpos = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPIECE;
-
- DEBUG_PARSE("piec");
-
- ret = regatom(pRExC_state, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN)
- *flagp |= TRYAGAIN;
- return(NULL);
- }
-
- op = *RExC_parse;
-
- if (op == '{' && regcurly(RExC_parse)) {
- maxpos = NULL;
- parse_start = RExC_parse; /* MJD */
- next = RExC_parse + 1;
- while (isDIGIT(*next) || *next == ',') {
- if (*next == ',') {
- if (maxpos)
- break;
- else
- maxpos = next;
- }
- next++;
- }
- if (*next == '}') { /* got one */
- if (!maxpos)
- maxpos = next;
- RExC_parse++;
- min = atoi(RExC_parse);
- if (*maxpos == ',')
- maxpos++;
- else
- maxpos = RExC_parse;
- max = atoi(maxpos);
- if (!max && *maxpos != '0')
- max = REG_INFTY; /* meaning "infinity" */
- else if (max >= REG_INFTY)
- vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1);
- RExC_parse = next;
- nextchar(pRExC_state);
-
- do_curly:
- if ((flags&SIMPLE)) {
- RExC_naughty += 2 + RExC_naughty / 2;
- reginsert(pRExC_state, CURLY, ret, depth+1);
- Set_Node_Offset(ret, parse_start+1); /* MJD */
- Set_Node_Cur_Length(ret);
- }
- else {
- regnode * const w = reg_node(pRExC_state, WHILEM);
-
- w->flags = 0;
- REGTAIL(pRExC_state, ret, w);
- if (!SIZE_ONLY && RExC_extralen) {
- reginsert(pRExC_state, LONGJMP,ret, depth+1);
- reginsert(pRExC_state, NOTHING,ret, depth+1);
- NEXT_OFF(ret) = 3; /* Go over LONGJMP. */
- }
- reginsert(pRExC_state, CURLYX,ret, depth+1);
- /* MJD hk */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Length(ret,
- op == '{' ? (RExC_parse - parse_start) : 1);
-
- if (!SIZE_ONLY && RExC_extralen)
- NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */
- REGTAIL(pRExC_state, ret, reg_node(pRExC_state, NOTHING));
- if (SIZE_ONLY)
- RExC_whilem_seen++, RExC_extralen += 3;
- RExC_naughty += 4 + RExC_naughty; /* compound interest */
- }
- ret->flags = 0;
-
- if (min > 0)
- *flagp = WORST;
- if (max > 0)
- *flagp |= HASWIDTH;
- if (max < min)
- vFAIL("Can't do {n,m} with n > m");
- if (!SIZE_ONLY) {
- ARG1_SET(ret, (U16)min);
- ARG2_SET(ret, (U16)max);
- }
-
- goto nest_check;
- }
- }
-
- if (!ISMULT1(op)) {
- *flagp = flags;
- return(ret);
- }
-
-#if 0 /* Now runtime fix should be reliable. */
-
- /* if this is reinstated, don't forget to put this back into perldiag:
-
- =item Regexp *+ operand could be empty at {#} in regex m/%s/
-
- (F) The part of the regexp subject to either the * or + quantifier
- could match an empty string. The {#} shows in the regular
- expression about where the problem was discovered.
-
- */
-
- if (!(flags&HASWIDTH) && op != '?')
- vFAIL("Regexp *+ operand could be empty");
-#endif
-
- parse_start = RExC_parse;
- nextchar(pRExC_state);
-
- *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH);
-
- if (op == '*' && (flags&SIMPLE)) {
- reginsert(pRExC_state, STAR, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 4;
- }
- else if (op == '*') {
- min = 0;
- goto do_curly;
- }
- else if (op == '+' && (flags&SIMPLE)) {
- reginsert(pRExC_state, PLUS, ret, depth+1);
- ret->flags = 0;
- RExC_naughty += 3;
- }
- else if (op == '+') {
- min = 1;
- goto do_curly;
- }
- else if (op == '?') {
- min = 0; max = 1;
- goto do_curly;
- }
- nest_check:
- if (!SIZE_ONLY && !(flags&(HASWIDTH|POSTPONED)) && max > REG_INFTY/3) {
- ckWARN3reg(RExC_parse,
- "%.*s matches null string many times",
- (int)(RExC_parse >= origparse ? RExC_parse - origparse : 0),
- origparse);
- }
-
- if (RExC_parse < RExC_end && *RExC_parse == '?') {
- nextchar(pRExC_state);
- reginsert(pRExC_state, MINMOD, ret, depth+1);
- REGTAIL(pRExC_state, ret, ret + NODE_STEP_REGNODE);
- }
-#ifndef REG_ALLOW_MINMOD_SUSPEND
- else
-#endif
- if (RExC_parse < RExC_end && *RExC_parse == '+') {
- regnode *ender;
- nextchar(pRExC_state);
- ender = reg_node(pRExC_state, SUCCEED);
- REGTAIL(pRExC_state, ret, ender);
- reginsert(pRExC_state, SUSPEND, ret, depth+1);
- ret->flags = 0;
- ender = reg_node(pRExC_state, TAIL);
- REGTAIL(pRExC_state, ret, ender);
- /*ret= ender;*/
- }
-
- if (RExC_parse < RExC_end && ISMULT2(RExC_parse)) {
- RExC_parse++;
- vFAIL("Nested quantifiers");
- }
-
- return(ret);
-}
-
-
-/* reg_namedseq(pRExC_state,UVp)
-
- This is expected to be called by a parser routine that has
- recognized '\N' and needs to handle the rest. RExC_parse is
- expected to point at the first char following the N at the time
- of the call.
-
- The \N may be inside (indicated by valuep not being NULL) or outside a
- character class.
-
- \N may begin either a named sequence, or if outside a character class, mean
- to match a non-newline. For non single-quoted regexes, the tokenizer has
- attempted to decide which, and in the case of a named sequence converted it
- into one of the forms: \N{} (if the sequence is null), or \N{U+c1.c2...},
- where c1... are the characters in the sequence. For single-quoted regexes,
- the tokenizer passes the \N sequence through unchanged; this code will not
- attempt to determine this nor expand those. The net effect is that if the
- beginning of the passed-in pattern isn't '{U+' or there is no '}', it
- signals that this \N occurrence means to match a non-newline.
-
- Only the \N{U+...} form should occur in a character class, for the same
- reason that '.' inside a character class means to just match a period: it
- just doesn't make sense.
-
- If valuep is non-null then it is assumed that we are parsing inside
- of a charclass definition and the first codepoint in the resolved
- string is returned via *valuep and the routine will return NULL.
- In this mode if a multichar string is returned from the charnames
- handler, a warning will be issued, and only the first char in the
- sequence will be examined. If the string returned is zero length
- then the value of *valuep is undefined and NON-NULL will
- be returned to indicate failure. (This will NOT be a valid pointer
- to a regnode.)
-
- If valuep is null then it is assumed that we are parsing normal text and a
- new EXACT node is inserted into the program containing the resolved string,
- and a pointer to the new node is returned. But if the string is zero length
- a NOTHING node is emitted instead.
-
- On success RExC_parse is set to the char following the endbrace.
- Parsing failures will generate a fatal error via vFAIL(...)
- */
-STATIC regnode *
-S_reg_namedseq(pTHX_ RExC_state_t *pRExC_state, UV *valuep, I32 *flagp)
-{
- char * endbrace; /* '}' following the name */
- regnode *ret = NULL;
-#ifdef DEBUGGING
- char* parse_start = RExC_parse - 2; /* points to the '\N' */
-#endif
- char* p;
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NAMEDSEQ;
-
- GET_RE_DEBUG_FLAGS;
-
- /* The [^\n] meaning of \N ignores spaces and comments under the /x
- * modifier. The other meaning does not */
- p = (RExC_flags & RXf_PMf_EXTENDED)
- ? regwhite( pRExC_state, RExC_parse )
- : RExC_parse;
-
- /* Disambiguate between \N meaning a named character versus \N meaning
- * [^\n]. The former is assumed when it can't be the latter. */
- if (*p != '{' || regcurly(p)) {
- RExC_parse = p;
- if (valuep) {
- /* no bare \N in a charclass */
- vFAIL("\\N in a character class must be a named character: \\N{...}");
- }
- nextchar(pRExC_state);
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- RExC_parse--;
- Set_Node_Length(ret, 1); /* MJD */
- return ret;
- }
-
- /* Here, we have decided it should be a named sequence */
-
- /* The test above made sure that the next real character is a '{', but
- * under the /x modifier, it could be separated by space (or a comment and
- * \n) and this is not allowed (for consistency with \x{...} and the
- * tokenizer handling of \N{NAME}). */
- if (*RExC_parse != '{') {
- vFAIL("Missing braces on \\N{}");
- }
-
- RExC_parse++; /* Skip past the '{' */
-
- if (! (endbrace = strchr(RExC_parse, '}')) /* no trailing brace */
- || ! (endbrace == RExC_parse /* nothing between the {} */
- || (endbrace - RExC_parse >= 2 /* U+ (bad hex is checked below */
- && strnEQ(RExC_parse, "U+", 2)))) /* for a better error msg) */
- {
- if (endbrace) RExC_parse = endbrace; /* position msg's '<--HERE' */
- vFAIL("\\N{NAME} must be resolved by the lexer");
- }
-
- if (endbrace == RExC_parse) { /* empty: \N{} */
- if (! valuep) {
- RExC_parse = endbrace + 1;
- return reg_node(pRExC_state,NOTHING);
- }
-
- if (SIZE_ONLY) {
- ckWARNreg(RExC_parse,
- "Ignoring zero length \\N{} in character class"
- );
- RExC_parse = endbrace + 1;
- }
- *valuep = 0;
- return (regnode *) &RExC_parse; /* Invalid regnode pointer */
- }
-
- RExC_utf8 = 1; /* named sequences imply Unicode semantics */
- RExC_parse += 2; /* Skip past the 'U+' */
-
- if (valuep) { /* In a bracketed char class */
- /* We only pay attention to the first char of
- multichar strings being returned. I kinda wonder
- if this makes sense as it does change the behaviour
- from earlier versions, OTOH that behaviour was broken
- as well. XXX Solution is to recharacterize as
- [rest-of-class]|multi1|multi2... */
-
- STRLEN length_of_hex;
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX
- | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0);
-
- char * endchar = strchr(RExC_parse, '.');
- if (endchar) {
- ckWARNreg(endchar, "Using just the first character returned by \\N{} in character class");
- }
- else endchar = endbrace;
-
- length_of_hex = (STRLEN)(endchar - RExC_parse);
- *valuep = grok_hex(RExC_parse, &length_of_hex, &flags, NULL);
-
- /* The tokenizer should have guaranteed validity, but it's possible to
- * bypass it by using single quoting, so check */
- if (length_of_hex == 0
- || length_of_hex != (STRLEN)(endchar - RExC_parse) )
- {
- RExC_parse += length_of_hex; /* Includes all the valid */
- RExC_parse += (RExC_orig_utf8) /* point to after 1st invalid */
- ? UTF8SKIP(RExC_parse)
- : 1;
- /* Guard against malformed utf8 */
- if (RExC_parse >= endchar) RExC_parse = endchar;
- vFAIL("Invalid hexadecimal number in \\N{U+...}");
- }
-
- RExC_parse = endbrace + 1;
- if (endchar == endbrace) return NULL;
-
- ret = (regnode *) &RExC_parse; /* Invalid regnode pointer */
- }
- else { /* Not a char class */
- char *s; /* String to put in generated EXACT node */
- STRLEN len = 0; /* Its current length */
- char *endchar; /* Points to '.' or '}' ending cur char in the input
- stream */
-
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s= STRING(ret);
-
- /* Exact nodes can hold only a U8 length's of text = 255. Loop through
- * the input which is of the form now 'c1.c2.c3...}' until find the
- * ending brace or exeed length 255. The characters that exceed this
- * limit are dropped. The limit could be relaxed should it become
- * desirable by reparsing this as (?:\N{NAME}), so could generate
- * multiple EXACT nodes, as is done for just regular input. But this
- * is primarily a named character, and not intended to be a huge long
- * string, so 255 bytes should be good enough */
- while (1) {
- STRLEN length_of_hex;
- I32 grok_flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX
- | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0);
- UV cp; /* Ord of current character */
-
- /* Code points are separated by dots. If none, there is only one
- * code point, and is terminated by the brace */
- endchar = strchr(RExC_parse, '.');
- if (! endchar) endchar = endbrace;
-
- /* The values are Unicode even on EBCDIC machines */
- length_of_hex = (STRLEN)(endchar - RExC_parse);
- cp = grok_hex(RExC_parse, &length_of_hex, &grok_flags, NULL);
- if ( length_of_hex == 0
- || length_of_hex != (STRLEN)(endchar - RExC_parse) )
- {
- RExC_parse += length_of_hex; /* Includes all the valid */
- RExC_parse += (RExC_orig_utf8) /* point to after 1st invalid */
- ? UTF8SKIP(RExC_parse)
- : 1;
- /* Guard against malformed utf8 */
- if (RExC_parse >= endchar) RExC_parse = endchar;
- vFAIL("Invalid hexadecimal number in \\N{U+...}");
- }
-
- if (! FOLD) { /* Not folding, just append to the string */
- STRLEN unilen;
-
- /* Quit before adding this character if would exceed limit */
- if (len + UNISKIP(cp) > U8_MAX) break;
-
- unilen = reguni(pRExC_state, cp, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- } else { /* Folding, output the folded equivalent */
- STRLEN foldlen,numlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
- cp = toFOLD_uni(cp, tmpbuf, &foldlen);
-
- /* Quit before exceeding size limit */
- if (len + foldlen > U8_MAX) break;
-
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen)
- {
- cp = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, cp, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- }
-
- /* Point to the beginning of the next character in the sequence. */
- RExC_parse = endchar + 1;
-
- /* Quit if no more characters */
- if (RExC_parse >= endbrace) break;
- }
-
-
- if (SIZE_ONLY) {
- if (RExC_parse < endbrace) {
- ckWARNreg(RExC_parse - 1,
- "Using just the first characters returned by \\N{}");
- }
-
- RExC_size += STR_SZ(len);
- } else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
-
- RExC_parse = endbrace + 1;
-
- *flagp |= HASWIDTH; /* Not SIMPLE, as that causes the engine to fail
- with malformed in t/re/pat_advanced.t */
- RExC_parse --;
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
- }
-
- return ret;
-}
-
-
-/*
- * reg_recode
- *
- * It returns the code point in utf8 for the value in *encp.
- * value: a code value in the source encoding
- * encp: a pointer to an Encode object
- *
- * If the result from Encode is not a single character,
- * it returns U+FFFD (Replacement character) and sets *encp to NULL.
- */
-STATIC UV
-S_reg_recode(pTHX_ const char value, SV **encp)
-{
- STRLEN numlen = 1;
- SV * const sv = newSVpvn_flags(&value, numlen, SVs_TEMP);
- const char * const s = *encp ? sv_recode_to_utf8(sv, *encp) : SvPVX(sv);
- const STRLEN newlen = SvCUR(sv);
- UV uv = UNICODE_REPLACEMENT;
-
- PERL_ARGS_ASSERT_REG_RECODE;
-
- if (newlen)
- uv = SvUTF8(sv)
- ? utf8n_to_uvchr((U8*)s, newlen, &numlen, UTF8_ALLOW_DEFAULT)
- : *(U8*)s;
-
- if (!newlen || numlen != newlen) {
- uv = UNICODE_REPLACEMENT;
- *encp = NULL;
- }
- return uv;
-}
-
-
-/*
- - regatom - the lowest level
-
- Try to identify anything special at the start of the pattern. If there
- is, then handle it as required. This may involve generating a single regop,
- such as for an assertion; or it may involve recursing, such as to
- handle a () structure.
-
- If the string doesn't start with something special then we gobble up
- as much literal text as we can.
-
- Once we have been able to handle whatever type of thing started the
- sequence, we return.
-
- Note: we have to be careful with escapes, as they can be both literal
- and special, and in the case of \10 and friends can either, depending
- on context. Specifically there are two seperate switches for handling
- escape sequences, with the one for handling literal escapes requiring
- a dummy entry for all of the special escapes that are actually handled
- by the other.
-*/
-
-STATIC regnode *
-S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
-{
- dVAR;
- register regnode *ret = NULL;
- I32 flags;
- char *parse_start = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_PARSE("atom");
- *flagp = WORST; /* Tentatively. */
-
- PERL_ARGS_ASSERT_REGATOM;
-
-tryagain:
- switch ((U8)*RExC_parse) {
- case '^':
- RExC_seen_zerolen++;
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MBOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SBOL);
- else
- ret = reg_node(pRExC_state, BOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '$':
- nextchar(pRExC_state);
- if (*RExC_parse)
- RExC_seen_zerolen++;
- if (RExC_flags & RXf_PMf_MULTILINE)
- ret = reg_node(pRExC_state, MEOL);
- else if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SEOL);
- else
- ret = reg_node(pRExC_state, EOL);
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '.':
- nextchar(pRExC_state);
- if (RExC_flags & RXf_PMf_SINGLELINE)
- ret = reg_node(pRExC_state, SANY);
- else
- ret = reg_node(pRExC_state, REG_ANY);
- *flagp |= HASWIDTH|SIMPLE;
- RExC_naughty++;
- Set_Node_Length(ret, 1); /* MJD */
- break;
- case '[':
- {
- char * const oregcomp_parse = ++RExC_parse;
- ret = regclass(pRExC_state,depth+1);
- if (*RExC_parse != ']') {
- RExC_parse = oregcomp_parse;
- vFAIL("Unmatched [");
- }
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */
- break;
- }
- case '(':
- nextchar(pRExC_state);
- ret = reg(pRExC_state, 1, &flags,depth+1);
- if (ret == NULL) {
- if (flags & TRYAGAIN) {
- if (RExC_parse == RExC_end) {
- /* Make parent create an empty node if needed. */
- *flagp |= TRYAGAIN;
- return(NULL);
- }
- goto tryagain;
- }
- return(NULL);
- }
- *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE|POSTPONED);
- break;
- case '|':
- case ')':
- if (flags & TRYAGAIN) {
- *flagp |= TRYAGAIN;
- return NULL;
- }
- vFAIL("Internal urp");
- /* Supposed to be caught earlier. */
- break;
- case '{':
- if (!regcurly(RExC_parse)) {
- RExC_parse++;
- goto defchar;
- }
- /* FALL THROUGH */
- case '?':
- case '+':
- case '*':
- RExC_parse++;
- vFAIL("Quantifier follows nothing");
- break;
- case 0xDF:
- case 0xC3:
- case 0xCE:
- do_foldchar:
- if (!LOC && FOLD) {
- U32 len,cp;
- len=0; /* silence a spurious compiler warning */
- if ((cp = what_len_TRICKYFOLD_safe(RExC_parse,RExC_end,UTF,len))) {
- *flagp |= HASWIDTH; /* could be SIMPLE too, but needs a handler in regexec.regrepeat */
- RExC_parse+=len-1; /* we get one from nextchar() as well. :-( */
- ret = reganode(pRExC_state, FOLDCHAR, cp);
- Set_Node_Length(ret, 1); /* MJD */
- nextchar(pRExC_state); /* kill whitespace under /x */
- return ret;
- }
- }
- goto outer_default;
- case '\\':
- /* Special Escapes
-
- This switch handles escape sequences that resolve to some kind
- of special regop and not to literal text. Escape sequnces that
- resolve to literal text are handled below in the switch marked
- "Literal Escapes".
-
- Every entry in this switch *must* have a corresponding entry
- in the literal escape switch. However, the opposite is not
- required, as the default for this switch is to jump to the
- literal text handling code.
- */
- switch ((U8)*++RExC_parse) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- goto do_foldchar;
- /* Special Escapes */
- case 'A':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, SBOL);
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'G':
- ret = reg_node(pRExC_state, GPOS);
- RExC_seen |= REG_SEEN_GPOS;
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'K':
- RExC_seen_zerolen++;
- ret = reg_node(pRExC_state, KEEPS);
- *flagp |= SIMPLE;
- /* XXX:dmq : disabling in-place substitution seems to
- * be necessary here to avoid cases of memory corruption, as
- * with: C<$_="x" x 80; s/x\K/y/> -- rgs
- */
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- goto finish_meta_pat;
- case 'Z':
- ret = reg_node(pRExC_state, SEOL);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'z':
- ret = reg_node(pRExC_state, EOS);
- *flagp |= SIMPLE;
- RExC_seen_zerolen++; /* Do not optimize RE away */
- goto finish_meta_pat;
- case 'C':
- ret = reg_node(pRExC_state, CANY);
- RExC_seen |= REG_SEEN_CANY;
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'X':
- ret = reg_node(pRExC_state, CLUMP);
- *flagp |= HASWIDTH;
- goto finish_meta_pat;
- case 'w':
- ret = reg_node(pRExC_state, (U8)(LOC ? ALNUML : ALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'W':
- ret = reg_node(pRExC_state, (U8)(LOC ? NALNUML : NALNUM));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'b':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? BOUNDL : BOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 'B':
- RExC_seen_zerolen++;
- RExC_seen |= REG_SEEN_LOOKBEHIND;
- ret = reg_node(pRExC_state, (U8)(LOC ? NBOUNDL : NBOUND));
- *flagp |= SIMPLE;
- goto finish_meta_pat;
- case 's':
- ret = reg_node(pRExC_state, (U8)(LOC ? SPACEL : SPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'S':
- ret = reg_node(pRExC_state, (U8)(LOC ? NSPACEL : NSPACE));
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'd':
- ret = reg_node(pRExC_state, DIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'D':
- ret = reg_node(pRExC_state, NDIGIT);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'R':
- ret = reg_node(pRExC_state, LNBREAK);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'h':
- ret = reg_node(pRExC_state, HORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'H':
- ret = reg_node(pRExC_state, NHORIZWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'v':
- ret = reg_node(pRExC_state, VERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- goto finish_meta_pat;
- case 'V':
- ret = reg_node(pRExC_state, NVERTWS);
- *flagp |= HASWIDTH|SIMPLE;
- finish_meta_pat:
- nextchar(pRExC_state);
- Set_Node_Length(ret, 2); /* MJD */
- break;
- case 'p':
- case 'P':
- {
- char* const oldregxend = RExC_end;
-#ifdef DEBUGGING
- char* parse_start = RExC_parse - 2;
-#endif
-
- if (RExC_parse[1] == '{') {
- /* a lovely hack--pretend we saw [\pX] instead */
- RExC_end = strchr(RExC_parse, '}');
- if (!RExC_end) {
- const U8 c = (U8)*RExC_parse;
- RExC_parse += 2;
- RExC_end = oldregxend;
- vFAIL2("Missing right brace on \\%c{}", c);
- }
- RExC_end++;
- }
- else {
- RExC_end = RExC_parse + 2;
- if (RExC_end > oldregxend)
- RExC_end = oldregxend;
- }
- RExC_parse--;
-
- ret = regclass(pRExC_state,depth+1);
-
- RExC_end = oldregxend;
- RExC_parse--;
-
- Set_Node_Offset(ret, parse_start + 2);
- Set_Node_Cur_Length(ret);
- nextchar(pRExC_state);
- *flagp |= HASWIDTH|SIMPLE;
- }
- break;
- case 'N':
- /* Handle \N and \N{NAME} here and not below because it can be
- multicharacter. join_exact() will join them up later on.
- Also this makes sure that things like /\N{BLAH}+/ and
- \N{BLAH} being multi char Just Happen. dmq*/
- ++RExC_parse;
- ret= reg_namedseq(pRExC_state, NULL, flagp);
- break;
- case 'k': /* Handle \k<NAME> and \k'NAME' */
- parse_named_seq:
- {
- char ch= RExC_parse[1];
- if (ch != '<' && ch != '\'' && ch != '{') {
- RExC_parse++;
- vFAIL2("Sequence %.2s... not terminated",parse_start);
- } else {
- /* this pretty much dupes the code for (?P=...) in reg(), if
- you change this make sure you change that */
- char* name_start = (RExC_parse += 2);
- U32 num = 0;
- SV *sv_dat = reg_scan_name(pRExC_state,
- SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA);
- ch= (ch == '<') ? '>' : (ch == '{') ? '}' : '\'';
- if (RExC_parse == name_start || *RExC_parse != ch)
- vFAIL2("Sequence %.3s... not terminated",parse_start);
-
- if (!SIZE_ONLY) {
- num = add_data( pRExC_state, 1, "S" );
- RExC_rxi->data->data[num]=(void*)sv_dat;
- SvREFCNT_inc_simple_void(sv_dat);
- }
-
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
-
- }
- break;
- }
- case 'g':
- case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 num;
- bool isg = *RExC_parse == 'g';
- bool isrel = 0;
- bool hasbrace = 0;
- if (isg) {
- RExC_parse++;
- if (*RExC_parse == '{') {
- RExC_parse++;
- hasbrace = 1;
- }
- if (*RExC_parse == '-') {
- RExC_parse++;
- isrel = 1;
- }
- if (hasbrace && !isDIGIT(*RExC_parse)) {
- if (isrel) RExC_parse--;
- RExC_parse -= 2;
- goto parse_named_seq;
- } }
- num = atoi(RExC_parse);
- if (isg && num == 0)
- vFAIL("Reference to invalid group 0");
- if (isrel) {
- num = RExC_npar - num;
- if (num < 1)
- vFAIL("Reference to nonexistent or unclosed group");
- }
- if (!isg && num > 9 && num >= RExC_npar)
- goto defchar;
- else {
- char * const parse_start = RExC_parse - 1; /* MJD */
- while (isDIGIT(*RExC_parse))
- RExC_parse++;
- if (parse_start == RExC_parse - 1)
- vFAIL("Unterminated \\g... pattern");
- if (hasbrace) {
- if (*RExC_parse != '}')
- vFAIL("Unterminated \\g{...} pattern");
- RExC_parse++;
- }
- if (!SIZE_ONLY) {
- if (num > (I32)RExC_rx->nparens)
- vFAIL("Reference to nonexistent group");
- }
- RExC_sawback = 1;
- ret = reganode(pRExC_state,
- (U8)(FOLD ? (LOC ? REFFL : REFF) : REF),
- num);
- *flagp |= HASWIDTH;
-
- /* override incorrect value set in reganode MJD */
- Set_Node_Offset(ret, parse_start+1);
- Set_Node_Cur_Length(ret); /* MJD */
- RExC_parse--;
- nextchar(pRExC_state);
- }
- }
- break;
- case '\0':
- if (RExC_parse >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- /* Do not generate "unrecognized" warnings here, we fall
- back into the quick-grab loop below */
- parse_start--;
- goto defchar;
- }
- break;
-
- case '#':
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if ( reg_skipcomment( pRExC_state ) )
- goto tryagain;
- }
- /* FALL THROUGH */
-
- default:
- outer_default:{
- register STRLEN len;
- register UV ender;
- register char *p;
- char *s;
- STRLEN foldlen;
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf;
-
- parse_start = RExC_parse - 1;
-
- RExC_parse++;
-
- defchar:
- ender = 0;
- ret = reg_node(pRExC_state,
- (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT));
- s = STRING(ret);
- for (len = 0, p = RExC_parse - 1;
- len < 127 && p < RExC_end;
- len++)
- {
- char * const oldp = p;
-
- if (RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- switch ((U8)*p) {
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case '^':
- case '$':
- case '.':
- case '[':
- case '(':
- case ')':
- case '|':
- goto loopdone;
- case '\\':
- /* Literal Escapes Switch
-
- This switch is meant to handle escape sequences that
- resolve to a literal character.
-
- Every escape sequence that represents something
- else, like an assertion or a char class, is handled
- in the switch marked 'Special Escapes' above in this
- routine, but also has an entry here as anything that
- isn't explicitly mentioned here will be treated as
- an unescaped equivalent literal.
- */
-
- switch ((U8)*++p) {
- /* These are all the special escapes. */
- case 0xDF:
- case 0xC3:
- case 0xCE:
- if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF))
- goto normal_default;
- case 'A': /* Start assertion */
- case 'b': case 'B': /* Word-boundary assertion*/
- case 'C': /* Single char !DANGEROUS! */
- case 'd': case 'D': /* digit class */
- case 'g': case 'G': /* generic-backref, pos assertion */
- case 'h': case 'H': /* HORIZWS */
- case 'k': case 'K': /* named backref, keep marker */
- case 'N': /* named char sequence */
- case 'p': case 'P': /* Unicode property */
- case 'R': /* LNBREAK */
- case 's': case 'S': /* space class */
- case 'v': case 'V': /* VERTWS */
- case 'w': case 'W': /* word class */
- case 'X': /* eXtended Unicode "combining character sequence" */
- case 'z': case 'Z': /* End of line/string assertion */
- --p;
- goto loopdone;
-
- /* Anything after here is an escape that resolves to a
- literal. (Except digits, which may or may not)
- */
- case 'n':
- ender = '\n';
- p++;
- break;
- case 'r':
- ender = '\r';
- p++;
- break;
- case 't':
- ender = '\t';
- p++;
- break;
- case 'f':
- ender = '\f';
- p++;
- break;
- case 'e':
- ender = ASCII_TO_NATIVE('\033');
- p++;
- break;
- case 'a':
- ender = ASCII_TO_NATIVE('\007');
- p++;
- break;
- case 'x':
- if (*++p == '{') {
- char* const e = strchr(p, '}');
-
- if (!e) {
- RExC_parse = p + 1;
- vFAIL("Missing right brace on \\x{}");
- }
- else {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = e - p - 1;
- ender = grok_hex(p + 1, &numlen, &flags, NULL);
- if (ender > 0xff)
- RExC_utf8 = 1;
- p = e + 1;
- }
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- STRLEN numlen = 2;
- ender = grok_hex(p, &numlen, &flags, NULL);
- p += numlen;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- p++;
- ender = UCHARAT(p++);
- ender = toCTRL(ender);
- break;
- case '0': case '1': case '2': case '3':case '4':
- case '5': case '6': case '7': case '8':case '9':
- if (*p == '0' ||
- (isDIGIT(p[1]) && atoi(p) >= RExC_npar) ) {
- I32 flags = 0;
- STRLEN numlen = 3;
- ender = grok_oct(p, &numlen, &flags, NULL);
-
- /* An octal above 0xff is interpreted differently
- * depending on if the re is in utf8 or not. If it
- * is in utf8, the value will be itself, otherwise
- * it is interpreted as modulo 0x100. It has been
- * decided to discourage the use of octal above the
- * single-byte range. For now, warn only when
- * it ends up modulo */
- if (SIZE_ONLY && ender >= 0x100
- && ! UTF && ! PL_encoding) {
- ckWARNregdep(p, "Use of octal value above 377 is deprecated");
- }
- p += numlen;
- }
- else {
- --p;
- goto loopdone;
- }
- if (PL_encoding && ender < 0x100)
- goto recode_encoding;
- break;
- recode_encoding:
- {
- SV* enc = PL_encoding;
- ender = reg_recode((const char)(U8)ender, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(p, "Invalid escape in the specified encoding");
- RExC_utf8 = 1;
- }
- break;
- case '\0':
- if (p >= RExC_end)
- FAIL("Trailing \\");
- /* FALL THROUGH */
- default:
- if (!SIZE_ONLY&& isALPHA(*p))
- ckWARN2reg(p + 1, "Unrecognized escape \\%c passed through", UCHARAT(p));
- goto normal_default;
- }
- break;
- default:
- normal_default:
- if (UTF8_IS_START(*p) && UTF) {
- STRLEN numlen;
- ender = utf8n_to_uvchr((U8*)p, RExC_end - p,
- &numlen, UTF8_ALLOW_DEFAULT);
- p += numlen;
- }
- else
- ender = *p++;
- break;
- }
- if ( RExC_flags & RXf_PMf_EXTENDED)
- p = regwhite( pRExC_state, p );
- if (UTF && FOLD) {
- /* Prime the casefolded buffer. */
- ender = toFOLD_uni(ender, tmpbuf, &foldlen);
- }
- if (p < RExC_end && ISMULT2(p)) { /* Back off on ?+*. */
- if (len)
- p = oldp;
- else if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- s += unilen;
- len += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break; /* "Can't happen." */
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- }
- else {
- len++;
- REGC((char)ender, s++);
- }
- break;
- }
- if (UTF) {
- if (FOLD) {
- /* Emit all the Unicode characters. */
- STRLEN numlen;
- for (foldbuf = tmpbuf;
- foldlen;
- foldlen -= numlen) {
- ender = utf8_to_uvchr(foldbuf, &numlen);
- if (numlen > 0) {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- len += unilen;
- s += unilen;
- /* In EBCDIC the numlen
- * and unilen can differ. */
- foldbuf += numlen;
- if (numlen >= foldlen)
- break;
- }
- else
- break;
- }
- }
- else {
- const STRLEN unilen = reguni(pRExC_state, ender, s);
- if (unilen > 0) {
- s += unilen;
- len += unilen;
- }
- }
- len--;
- }
- else
- REGC((char)ender, s++);
- }
- loopdone:
- RExC_parse = p - 1;
- Set_Node_Cur_Length(ret); /* MJD */
- nextchar(pRExC_state);
- {
- /* len is STRLEN which is unsigned, need to copy to signed */
- IV iv = len;
- if (iv < 0)
- vFAIL("Internal disaster");
- }
- if (len > 0)
- *flagp |= HASWIDTH;
- if (len == 1 && UNI_IS_INVARIANT(ender))
- *flagp |= SIMPLE;
-
- if (SIZE_ONLY)
- RExC_size += STR_SZ(len);
- else {
- STR_LEN(ret) = len;
- RExC_emit += STR_SZ(len);
- }
- }
- break;
- }
-
- return(ret);
-}
-
-STATIC char *
-S_regwhite( RExC_state_t *pRExC_state, char *p )
-{
- const char *e = RExC_end;
-
- PERL_ARGS_ASSERT_REGWHITE;
-
- while (p < e) {
- if (isSPACE(*p))
- ++p;
- else if (*p == '#') {
- bool ended = 0;
- do {
- if (*p++ == '\n') {
- ended = 1;
- break;
- }
- } while (p < e);
- if (!ended)
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- }
- else
- break;
- }
- return p;
-}
-
-/* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]].
- Character classes ([:foo:]) can also be negated ([:^foo:]).
- Returns a named class id (ANYOF_XXX) if successful, -1 otherwise.
- Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed,
- but trigger failures because they are currently unimplemented. */
-
-#define POSIXCC_DONE(c) ((c) == ':')
-#define POSIXCC_NOTYET(c) ((c) == '=' || (c) == '.')
-#define POSIXCC(c) (POSIXCC_DONE(c) || POSIXCC_NOTYET(c))
-
-STATIC I32
-S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value)
-{
- dVAR;
- I32 namedclass = OOB_NAMEDCLASS;
-
- PERL_ARGS_ASSERT_REGPPOSIXCC;
-
- if (value == '[' && RExC_parse + 1 < RExC_end &&
- /* I smell either [: or [= or [. -- POSIX has been here, right? */
- POSIXCC(UCHARAT(RExC_parse))) {
- const char c = UCHARAT(RExC_parse);
- char* const s = RExC_parse++;
-
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != c)
- RExC_parse++;
- if (RExC_parse == RExC_end)
- /* Grandfather lone [:, [=, [. */
- RExC_parse = s;
- else {
- const char* const t = RExC_parse++; /* skip over the c */
- assert(*t == c);
-
- if (UCHARAT(RExC_parse) == ']') {
- const char *posixcc = s + 1;
- RExC_parse++; /* skip over the ending ] */
-
- if (*s == ':') {
- const I32 complement = *posixcc == '^' ? *posixcc++ : 0;
- const I32 skip = t - posixcc;
-
- /* Initially switch on the length of the name. */
- switch (skip) {
- case 4:
- if (memEQ(posixcc, "word", 4)) /* this is not POSIX, this is the Perl \w */
- namedclass = complement ? ANYOF_NALNUM : ANYOF_ALNUM;
- break;
- case 5:
- /* Names all of length 5. */
- /* alnum alpha ascii blank cntrl digit graph lower
- print punct space upper */
- /* Offset 4 gives the best switch position. */
- switch (posixcc[4]) {
- case 'a':
- if (memEQ(posixcc, "alph", 4)) /* alpha */
- namedclass = complement ? ANYOF_NALPHA : ANYOF_ALPHA;
- break;
- case 'e':
- if (memEQ(posixcc, "spac", 4)) /* space */
- namedclass = complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC;
- break;
- case 'h':
- if (memEQ(posixcc, "grap", 4)) /* graph */
- namedclass = complement ? ANYOF_NGRAPH : ANYOF_GRAPH;
- break;
- case 'i':
- if (memEQ(posixcc, "asci", 4)) /* ascii */
- namedclass = complement ? ANYOF_NASCII : ANYOF_ASCII;
- break;
- case 'k':
- if (memEQ(posixcc, "blan", 4)) /* blank */
- namedclass = complement ? ANYOF_NBLANK : ANYOF_BLANK;
- break;
- case 'l':
- if (memEQ(posixcc, "cntr", 4)) /* cntrl */
- namedclass = complement ? ANYOF_NCNTRL : ANYOF_CNTRL;
- break;
- case 'm':
- if (memEQ(posixcc, "alnu", 4)) /* alnum */
- namedclass = complement ? ANYOF_NALNUMC : ANYOF_ALNUMC;
- break;
- case 'r':
- if (memEQ(posixcc, "lowe", 4)) /* lower */
- namedclass = complement ? ANYOF_NLOWER : ANYOF_LOWER;
- else if (memEQ(posixcc, "uppe", 4)) /* upper */
- namedclass = complement ? ANYOF_NUPPER : ANYOF_UPPER;
- break;
- case 't':
- if (memEQ(posixcc, "digi", 4)) /* digit */
- namedclass = complement ? ANYOF_NDIGIT : ANYOF_DIGIT;
- else if (memEQ(posixcc, "prin", 4)) /* print */
- namedclass = complement ? ANYOF_NPRINT : ANYOF_PRINT;
- else if (memEQ(posixcc, "punc", 4)) /* punct */
- namedclass = complement ? ANYOF_NPUNCT : ANYOF_PUNCT;
- break;
- }
- break;
- case 6:
- if (memEQ(posixcc, "xdigit", 6))
- namedclass = complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT;
- break;
- }
-
- if (namedclass == OOB_NAMEDCLASS)
- Simple_vFAIL3("POSIX class [:%.*s:] unknown",
- t - s - 1, s + 1);
- assert (posixcc[skip] == ':');
- assert (posixcc[skip+1] == ']');
- } else if (!SIZE_ONLY) {
- /* [[=foo=]] and [[.foo.]] are still future. */
-
- /* adjust RExC_parse so the warning shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse) != ']')
- RExC_parse++;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- } else {
- /* Maternal grandfather:
- * "[:" ending in ":" but not in ":]" */
- RExC_parse = s;
- }
- }
- }
-
- return namedclass;
-}
-
-STATIC void
-S_checkposixcc(pTHX_ RExC_state_t *pRExC_state)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_CHECKPOSIXCC;
-
- if (POSIXCC(UCHARAT(RExC_parse))) {
- const char *s = RExC_parse;
- const char c = *s++;
-
- while (isALNUM(*s))
- s++;
- if (*s && c == *s && s[1] == ']') {
- ckWARN3reg(s+2,
- "POSIX syntax [%c %c] belongs inside character classes",
- c, c);
-
- /* [[=foo=]] and [[.foo.]] are still future. */
- if (POSIXCC_NOTYET(c)) {
- /* adjust RExC_parse so the error shows after
- the class closes */
- while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse++) != ']')
- NOOP;
- Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
- }
- }
- }
-}
-
-
-#define _C_C_T_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- if (LOC) \
- ANYOF_CLASS_SET(ret, ANYOF_N##NAME); \
- else { \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- } \
- yesno = '!'; \
- what = WORD; \
- break
-
-#define _C_C_T_NOLOC_(NAME,TEST,WORD) \
-ANYOF_##NAME: \
- for (value = 0; value < 256; value++) \
- if (TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '+'; \
- what = WORD; \
- break; \
-case ANYOF_N##NAME: \
- for (value = 0; value < 256; value++) \
- if (!TEST) \
- ANYOF_BITMAP_SET(ret, value); \
- yesno = '!'; \
- what = WORD; \
- break
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define POSIX_CC_UNI_NAME(CCNAME) CCNAME
-#else
-#define POSIX_CC_UNI_NAME(CCNAME) "Posix" CCNAME
-#endif
-
-/*
- parse a class specification and produce either an ANYOF node that
- matches the pattern or if the pattern matches a single char only and
- that char is < 256 and we are case insensitive then we produce an
- EXACT node instead.
-*/
-
-STATIC regnode *
-S_regclass(pTHX_ RExC_state_t *pRExC_state, U32 depth)
-{
- dVAR;
- register UV nextvalue;
- register IV prevvalue = OOB_UNICODE;
- register IV range = 0;
- UV value = 0; /* XXX:dmq: needs to be referenceable (unfortunately) */
- register regnode *ret;
- STRLEN numlen;
- IV namedclass;
- char *rangebegin = NULL;
- bool need_class = 0;
- SV *listsv = NULL;
- UV n;
- bool optimize_invert = TRUE;
- AV* unicode_alternate = NULL;
-#ifdef EBCDIC
- UV literal_endpoint = 0;
-#endif
- UV stored = 0; /* number of chars stored in the class */
-
- regnode * const orig_emit = RExC_emit; /* Save the original RExC_emit in
- case we need to change the emitted regop to an EXACT. */
- const char * orig_parse = RExC_parse;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCLASS;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- DEBUG_PARSE("clas");
-
- /* Assume we are going to generate an ANYOF node. */
- ret = reganode(pRExC_state, ANYOF, 0);
-
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) = 0;
-
- if (UCHARAT(RExC_parse) == '^') { /* Complement of range. */
- RExC_naughty++;
- RExC_parse++;
- if (!SIZE_ONLY)
- ANYOF_FLAGS(ret) |= ANYOF_INVERT;
- }
-
- if (SIZE_ONLY) {
- RExC_size += ANYOF_SKIP;
- listsv = &PL_sv_undef; /* For code scanners: listsv always non-NULL. */
- }
- else {
- RExC_emit += ANYOF_SKIP;
- if (FOLD)
- ANYOF_FLAGS(ret) |= ANYOF_FOLD;
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_LOCALE;
- ANYOF_BITMAP_ZERO(ret);
- listsv = newSVpvs("# comment\n");
- }
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
-
- if (!SIZE_ONLY && POSIXCC(nextvalue))
- checkposixcc(pRExC_state);
-
- /* allow 1st char to be ] (allowing it to be - is dealt with later) */
- if (UCHARAT(RExC_parse) == ']')
- goto charclassloop;
-
-parseit:
- while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != ']') {
-
- charclassloop:
-
- namedclass = OOB_NAMEDCLASS; /* initialize as illegal */
-
- if (!range)
- rangebegin = RExC_parse;
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
-
- nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0;
- if (value == '[' && POSIXCC(nextvalue))
- namedclass = regpposixcc(pRExC_state, value);
- else if (value == '\\') {
- if (UTF) {
- value = utf8n_to_uvchr((U8*)RExC_parse,
- RExC_end - RExC_parse,
- &numlen, UTF8_ALLOW_DEFAULT);
- RExC_parse += numlen;
- }
- else
- value = UCHARAT(RExC_parse++);
- /* Some compilers cannot handle switching on 64-bit integer
- * values, therefore value cannot be an UV. Yes, this will
- * be a problem later if we want switch on Unicode.
- * A similar issue a little bit later when switching on
- * namedclass. --jhi */
- switch ((I32)value) {
- case 'w': namedclass = ANYOF_ALNUM; break;
- case 'W': namedclass = ANYOF_NALNUM; break;
- case 's': namedclass = ANYOF_SPACE; break;
- case 'S': namedclass = ANYOF_NSPACE; break;
- case 'd': namedclass = ANYOF_DIGIT; break;
- case 'D': namedclass = ANYOF_NDIGIT; break;
- case 'v': namedclass = ANYOF_VERTWS; break;
- case 'V': namedclass = ANYOF_NVERTWS; break;
- case 'h': namedclass = ANYOF_HORIZWS; break;
- case 'H': namedclass = ANYOF_NHORIZWS; break;
- case 'N': /* Handle \N{NAME} in class */
- {
- /* We only pay attention to the first char of
- multichar strings being returned. I kinda wonder
- if this makes sense as it does change the behaviour
- from earlier versions, OTOH that behaviour was broken
- as well. */
- UV v; /* value is register so we cant & it /grrr */
- if (reg_namedseq(pRExC_state, &v, NULL)) {
- goto parseit;
- }
- value= v;
- }
- break;
- case 'p':
- case 'P':
- {
- char *e;
- if (RExC_parse >= RExC_end)
- vFAIL2("Empty \\%c{}", (U8)value);
- if (*RExC_parse == '{') {
- const U8 c = (U8)value;
- e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL2("Missing right brace on \\%c{}", c);
- while (isSPACE(UCHARAT(RExC_parse)))
- RExC_parse++;
- if (e == RExC_parse)
- vFAIL2("Empty \\%c{}", c);
- n = e - RExC_parse;
- while (isSPACE(UCHARAT(RExC_parse + n - 1)))
- n--;
- }
- else {
- e = RExC_parse;
- n = 1;
- }
- if (!SIZE_ONLY) {
- if (UCHARAT(RExC_parse) == '^') {
- RExC_parse++;
- n--;
- value = value == 'p' ? 'P' : 'p'; /* toggle */
- while (isSPACE(UCHARAT(RExC_parse))) {
- RExC_parse++;
- n--;
- }
- }
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::%.*s\n",
- (value=='p' ? '+' : '!'), (int)n, RExC_parse);
- }
- RExC_parse = e + 1;
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- namedclass = ANYOF_MAX; /* no official name, but it's named */
- }
- break;
- case 'n': value = '\n'; break;
- case 'r': value = '\r'; break;
- case 't': value = '\t'; break;
- case 'f': value = '\f'; break;
- case 'b': value = '\b'; break;
- case 'e': value = ASCII_TO_NATIVE('\033');break;
- case 'a': value = ASCII_TO_NATIVE('\007');break;
- case 'x':
- if (*RExC_parse == '{') {
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX;
- char * const e = strchr(RExC_parse++, '}');
- if (!e)
- vFAIL("Missing right brace on \\x{}");
-
- numlen = e - RExC_parse;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse = e + 1;
- }
- else {
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
- numlen = 2;
- value = grok_hex(RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- }
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- case 'c':
- value = UCHARAT(RExC_parse++);
- value = toCTRL(value);
- break;
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- I32 flags = 0;
- numlen = 3;
- value = grok_oct(--RExC_parse, &numlen, &flags, NULL);
- RExC_parse += numlen;
- if (PL_encoding && value < 0x100)
- goto recode_encoding;
- break;
- }
- recode_encoding:
- {
- SV* enc = PL_encoding;
- value = reg_recode((const char)(U8)value, &enc);
- if (!enc && SIZE_ONLY)
- ckWARNreg(RExC_parse,
- "Invalid escape in the specified encoding");
- break;
- }
- default:
- if (!SIZE_ONLY && isALPHA(value))
- ckWARN2reg(RExC_parse,
- "Unrecognized escape \\%c in character class passed through",
- (int)value);
- break;
- }
- } /* end of \blah */
-#ifdef EBCDIC
- else
- literal_endpoint++;
-#endif
-
- if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */
-
- if (!SIZE_ONLY && !need_class)
- ANYOF_CLASS_ZERO(ret);
-
- need_class = 1;
-
- /* a bad range like a-\d, a-[:digit:] ? */
- if (range) {
- if (!SIZE_ONLY) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- ckWARN4reg(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
-
- if (prevvalue < 256) {
- ANYOF_BITMAP_SET(ret, prevvalue);
- ANYOF_BITMAP_SET(ret, '-');
- }
- else {
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-');
- }
- }
-
- range = 0; /* this was not a true range */
- }
-
-
-
- if (!SIZE_ONLY) {
- const char *what = NULL;
- char yesno = 0;
-
- if (namedclass > OOB_NAMEDCLASS)
- optimize_invert = FALSE;
- /* Possible truncation here but in some 64-bit environments
- * the compiler gets heartburn about switch on 64-bit values.
- * A similar issue a little earlier when switching on value.
- * --jhi */
- switch ((I32)namedclass) {
-
- case _C_C_T_(ALNUMC, isALNUMC(value), POSIX_CC_UNI_NAME("Alnum"));
- case _C_C_T_(ALPHA, isALPHA(value), POSIX_CC_UNI_NAME("Alpha"));
- case _C_C_T_(BLANK, isBLANK(value), POSIX_CC_UNI_NAME("Blank"));
- case _C_C_T_(CNTRL, isCNTRL(value), POSIX_CC_UNI_NAME("Cntrl"));
- case _C_C_T_(GRAPH, isGRAPH(value), POSIX_CC_UNI_NAME("Graph"));
- case _C_C_T_(LOWER, isLOWER(value), POSIX_CC_UNI_NAME("Lower"));
- case _C_C_T_(PRINT, isPRINT(value), POSIX_CC_UNI_NAME("Print"));
- case _C_C_T_(PSXSPC, isPSXSPC(value), POSIX_CC_UNI_NAME("Space"));
- case _C_C_T_(PUNCT, isPUNCT(value), POSIX_CC_UNI_NAME("Punct"));
- case _C_C_T_(UPPER, isUPPER(value), POSIX_CC_UNI_NAME("Upper"));
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
- case _C_C_T_(ALNUM, isALNUM(value), "Word");
- case _C_C_T_(SPACE, isSPACE(value), "SpacePerl");
-#else
- case _C_C_T_(SPACE, isSPACE(value), "PerlSpace");
- case _C_C_T_(ALNUM, isALNUM(value), "PerlWord");
-#endif
- case _C_C_T_(XDIGIT, isXDIGIT(value), "XDigit");
- case _C_C_T_NOLOC_(VERTWS, is_VERTWS_latin1(&value), "VertSpace");
- case _C_C_T_NOLOC_(HORIZWS, is_HORIZWS_latin1(&value), "HorizSpace");
- case ANYOF_ASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_ASCII);
- else {
-#ifndef EBCDIC
- for (value = 0; value < 128; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '+';
- what = "ASCII";
- break;
- case ANYOF_NASCII:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NASCII);
- else {
-#ifndef EBCDIC
- for (value = 128; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
-#else /* EBCDIC */
- for (value = 0; value < 256; value++) {
- if (!isASCII(value))
- ANYOF_BITMAP_SET(ret, value);
- }
-#endif /* EBCDIC */
- }
- yesno = '!';
- what = "ASCII";
- break;
- case ANYOF_DIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_DIGIT);
- else {
- /* consecutive digits assumed */
- for (value = '0'; value <= '9'; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '+';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_NDIGIT:
- if (LOC)
- ANYOF_CLASS_SET(ret, ANYOF_NDIGIT);
- else {
- /* consecutive digits assumed */
- for (value = 0; value < '0'; value++)
- ANYOF_BITMAP_SET(ret, value);
- for (value = '9' + 1; value < 256; value++)
- ANYOF_BITMAP_SET(ret, value);
- }
- yesno = '!';
- what = POSIX_CC_UNI_NAME("Digit");
- break;
- case ANYOF_MAX:
- /* this is to handle \p and \P */
- break;
- default:
- vFAIL("Invalid [::] class");
- break;
- }
- if (what) {
- /* Strings such as "+utf8::isWord\n" */
- Perl_sv_catpvf(aTHX_ listsv, "%cutf8::Is%s\n", yesno, what);
- }
- if (LOC)
- ANYOF_FLAGS(ret) |= ANYOF_CLASS;
- continue;
- }
- } /* end of namedclass \blah */
-
- if (range) {
- if (prevvalue > (IV)value) /* b-a */ {
- const int w = RExC_parse - rangebegin;
- Simple_vFAIL4("Invalid [] range \"%*.*s\"", w, w, rangebegin);
- range = 0; /* not a valid range */
- }
- }
- else {
- prevvalue = value; /* save the beginning of the range */
- if (*RExC_parse == '-' && RExC_parse+1 < RExC_end &&
- RExC_parse[1] != ']') {
- RExC_parse++;
-
- /* a bad range like \w-, [:word:]- ? */
- if (namedclass > OOB_NAMEDCLASS) {
- if (ckWARN(WARN_REGEXP)) {
- const int w =
- RExC_parse >= rangebegin ?
- RExC_parse - rangebegin : 0;
- vWARN4(RExC_parse,
- "False [] range \"%*.*s\"",
- w, w, rangebegin);
- }
- if (!SIZE_ONLY)
- ANYOF_BITMAP_SET(ret, '-');
- } else
- range = 1; /* yeah, it's a range! */
- continue; /* but do it the next time */
- }
- }
-
- /* now is the next time */
- /*stored += (value - prevvalue + 1);*/
- if (!SIZE_ONLY) {
- if (prevvalue < 256) {
- const IV ceilvalue = value < 256 ? value : 255;
- IV i;
-#ifdef EBCDIC
- /* In EBCDIC [\x89-\x91] should include
- * the \x8e but [i-j] should not. */
- if (literal_endpoint == 2 &&
- ((isLOWER(prevvalue) && isLOWER(ceilvalue)) ||
- (isUPPER(prevvalue) && isUPPER(ceilvalue))))
- {
- if (isLOWER(prevvalue)) {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isLOWER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- } else {
- for (i = prevvalue; i <= ceilvalue; i++)
- if (isUPPER(i) && !ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- else
-#endif
- for (i = prevvalue; i <= ceilvalue; i++) {
- if (!ANYOF_BITMAP_TEST(ret,i)) {
- stored++;
- ANYOF_BITMAP_SET(ret, i);
- }
- }
- }
- if (value > 255 || UTF) {
- const UV prevnatvalue = NATIVE_TO_UNI(prevvalue);
- const UV natvalue = NATIVE_TO_UNI(value);
- stored+=2; /* can't optimize this class */
- ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
- if (prevnatvalue < natvalue) { /* what about > ? */
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n",
- prevnatvalue, natvalue);
- }
- else if (prevnatvalue == natvalue) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", natvalue);
- if (FOLD) {
- U8 foldbuf[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const UV f = to_uni_fold(natvalue, foldbuf, &foldlen);
-
-#ifdef EBCDIC /* RD t/uni/fold ff and 6b */
- if (RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xDF || f == 0x92)) {
- f = NATIVE_TO_UNI(f);
- }
-#endif
- /* If folding and foldable and a single
- * character, insert also the folded version
- * to the charclass. */
- if (f != value) {
-#ifdef EBCDIC /* RD tunifold ligatures s,t fb05, fb06 */
- if ((RExC_precomp[0] == ':' &&
- RExC_precomp[1] == '[' &&
- (f == 0xA2 &&
- (value == 0xFB05 || value == 0xFB06))) ?
- foldlen == ((STRLEN)UNISKIP(f) - 1) :
- foldlen == (STRLEN)UNISKIP(f) )
-#else
- if (foldlen == (STRLEN)UNISKIP(f))
-#endif
- Perl_sv_catpvf(aTHX_ listsv,
- "%04"UVxf"\n", f);
- else {
- /* Any multicharacter foldings
- * require the following transform:
- * [ABCDEF] -> (?:[ABCabcDEFd]|pq|rst)
- * where E folds into "pq" and F folds
- * into "rst", all other characters
- * fold to single characters. We save
- * away these multicharacter foldings,
- * to be later saved as part of the
- * additional "s" data. */
- SV *sv;
-
- if (!unicode_alternate)
- unicode_alternate = newAV();
- sv = newSVpvn_utf8((char*)foldbuf, foldlen,
- TRUE);
- av_push(unicode_alternate, sv);
- }
- }
-
- /* If folding and the value is one of the Greek
- * sigmas insert a few more sigmas to make the
- * folding rules of the sigmas to work right.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (literal or EXACTF cases) are handled
- * during runtime in regexec.c:S_find_byclass(). */
- if (value == UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) {
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA);
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- else if (value == UNICODE_GREEK_CAPITAL_LETTER_SIGMA)
- Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
- (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA);
- }
- }
- }
-#ifdef EBCDIC
- literal_endpoint = 0;
-#endif
- }
-
- range = 0; /* this range (if it was one) is done now */
- }
-
- if (need_class) {
- ANYOF_FLAGS(ret) |= ANYOF_LARGE;
- if (SIZE_ONLY)
- RExC_size += ANYOF_CLASS_ADD_SKIP;
- else
- RExC_emit += ANYOF_CLASS_ADD_SKIP;
- }
-
-
- if (SIZE_ONLY)
- return ret;
- /****** !SIZE_ONLY AFTER HERE *********/
-
- if( stored == 1 && (value < 128 || (value < 256 && !UTF))
- && !( ANYOF_FLAGS(ret) & ( ANYOF_FLAGS_ALL ^ ANYOF_FOLD ) )
- ) {
- /* optimize single char class to an EXACT node
- but *only* when its not a UTF/high char */
- const char * cur_parse= RExC_parse;
- RExC_emit = (regnode *)orig_emit;
- RExC_parse = (char *)orig_parse;
- ret = reg_node(pRExC_state,
- (U8)((ANYOF_FLAGS(ret) & ANYOF_FOLD) ? EXACTF : EXACT));
- RExC_parse = (char *)cur_parse;
- *STRING(ret)= (char)value;
- STR_LEN(ret)= 1;
- RExC_emit += STR_SZ(1);
- SvREFCNT_dec(listsv);
- return ret;
- }
- /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */
- if ( /* If the only flag is folding (plus possibly inversion). */
- ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD)
- ) {
- for (value = 0; value < 256; ++value) {
- if (ANYOF_BITMAP_TEST(ret, value)) {
- UV fold = PL_fold[value];
-
- if (fold != value)
- ANYOF_BITMAP_SET(ret, fold);
- }
- }
- ANYOF_FLAGS(ret) &= ~ANYOF_FOLD;
- }
-
- /* optimize inverted simple patterns (e.g. [^a-z]) */
- if (optimize_invert &&
- /* If the only flag is inversion. */
- (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) {
- for (value = 0; value < ANYOF_BITMAP_SIZE; ++value)
- ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL;
- ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL;
- }
- {
- AV * const av = newAV();
- SV *rv;
- /* The 0th element stores the character class description
- * in its textual form: used later (regexec.c:Perl_regclass_swash())
- * to initialize the appropriate swash (which gets stored in
- * the 1st element), and also useful for dumping the regnode.
- * The 2nd element stores the multicharacter foldings,
- * used later (regexec.c:S_reginclass()). */
- av_store(av, 0, listsv);
- av_store(av, 1, NULL);
- av_store(av, 2, MUTABLE_SV(unicode_alternate));
- rv = newRV_noinc(MUTABLE_SV(av));
- n = add_data(pRExC_state, 1, "s");
- RExC_rxi->data->data[n] = (void*)rv;
- ARG_SET(ret, n);
- }
- return ret;
-}
-#undef _C_C_T_
-
-
-/* reg_skipcomment()
-
- Absorbs an /x style # comments from the input stream.
- Returns true if there is more text remaining in the stream.
- Will set the REG_SEEN_RUN_ON_COMMENT flag if the comment
- terminates the pattern without including a newline.
-
- Note its the callers responsibility to ensure that we are
- actually in /x mode
-
-*/
-
-STATIC bool
-S_reg_skipcomment(pTHX_ RExC_state_t *pRExC_state)
-{
- bool ended = 0;
-
- PERL_ARGS_ASSERT_REG_SKIPCOMMENT;
-
- while (RExC_parse < RExC_end)
- if (*RExC_parse++ == '\n') {
- ended = 1;
- break;
- }
- if (!ended) {
- /* we ran off the end of the pattern without ending
- the comment, so we have to add an \n when wrapping */
- RExC_seen |= REG_SEEN_RUN_ON_COMMENT;
- return 0;
- } else
- return 1;
-}
-
-/* nextchar()
-
- Advance that parse position, and optionall absorbs
- "whitespace" from the inputstream.
-
- Without /x "whitespace" means (?#...) style comments only,
- with /x this means (?#...) and # comments and whitespace proper.
-
- Returns the RExC_parse point from BEFORE the scan occurs.
-
- This is the /x friendly way of saying RExC_parse++.
-*/
-
-STATIC char*
-S_nextchar(pTHX_ RExC_state_t *pRExC_state)
-{
- char* const retval = RExC_parse++;
-
- PERL_ARGS_ASSERT_NEXTCHAR;
-
- for (;;) {
- if (*RExC_parse == '(' && RExC_parse[1] == '?' &&
- RExC_parse[2] == '#') {
- while (*RExC_parse != ')') {
- if (RExC_parse == RExC_end)
- FAIL("Sequence (?#... not terminated");
- RExC_parse++;
- }
- RExC_parse++;
- continue;
- }
- if (RExC_flags & RXf_PMf_EXTENDED) {
- if (isSPACE(*RExC_parse)) {
- RExC_parse++;
- continue;
- }
- else if (*RExC_parse == '#') {
- if ( reg_skipcomment( pRExC_state ) )
- continue;
- }
- }
- return retval;
- }
-}
-
-/*
-- reg_node - emit a node
-*/
-STATIC regnode * /* Location. */
-S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REG_NODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 1;
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE(ptr, op);
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, (ptr) - 1);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s:%d: (op %s) %s %"UVuf" (len %"UVuf") (max %"UVuf").\n",
- "reg_node", __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(RExC_emit, RExC_parse + (op == END));
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reganode - emit a node with an argument
-*/
-STATIC regnode * /* Location. */
-S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg)
-{
- dVAR;
- register regnode *ptr;
- regnode * const ret = RExC_emit;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGANODE;
-
- if (SIZE_ONLY) {
- SIZE_ALIGN(RExC_size);
- RExC_size += 2;
- /*
- We can't do this:
-
- assert(2==regarglen[op]+1);
-
- Anything larger than this has to allocate the extra amount.
- If we changed this to be:
-
- RExC_size += (1 + regarglen[op]);
-
- then it wouldn't matter. Its not clear what side effect
- might come from that so its not done so far.
- -- dmq
- */
- return(ret);
- }
- if (RExC_emit >= RExC_emit_bound)
- Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op);
-
- NODE_ALIGN_FILL(ret);
- ptr = ret;
- FILL_ADVANCE_NODE_ARG(ptr, op, arg);
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, (ptr) - 2);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reganode",
- __LINE__,
- PL_reg_name[op],
- (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] ?
- "Overwriting end of array!\n" : "OK",
- (UV)(RExC_emit - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Cur_Node_Offset;
- }
-#endif
- RExC_emit = ptr;
- return(ret);
-}
-
-/*
-- reguni - emit (if appropriate) a Unicode character
-*/
-STATIC STRLEN
-S_reguni(pTHX_ const RExC_state_t *pRExC_state, UV uv, char* s)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGUNI;
-
- return SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s);
-}
-
-/*
-- reginsert - insert an operator in front of already-emitted operand
-*
-* Means relocating the operand.
-*/
-STATIC void
-S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd, U32 depth)
-{
- dVAR;
- register regnode *src;
- register regnode *dst;
- register regnode *place;
- const int offset = regarglen[(U8)op];
- const int size = NODE_STEP_REGNODE + offset;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGINSERT;
- PERL_UNUSED_ARG(depth);
-/* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */
- DEBUG_PARSE_FMT("inst"," - %s",PL_reg_name[op]);
- if (SIZE_ONLY) {
- RExC_size += size;
- return;
- }
-
- src = RExC_emit;
- RExC_emit += size;
- dst = RExC_emit;
- if (RExC_open_parens) {
- int paren;
- /*DEBUG_PARSE_FMT("inst"," - %"IVdf, (IV)RExC_npar);*/
- for ( paren=0 ; paren < RExC_npar ; paren++ ) {
- if ( RExC_open_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("open"," - %d",size);*/
- RExC_open_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("open"," - %s","ok");*/
- }
- if ( RExC_close_parens[paren] >= opnd ) {
- /*DEBUG_PARSE_FMT("close"," - %d",size);*/
- RExC_close_parens[paren] += size;
- } else {
- /*DEBUG_PARSE_FMT("close"," - %s","ok");*/
- }
- }
- }
-
- while (src > opnd) {
- StructCopy(--src, --dst, regnode);
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD 20010112 */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s copy %"UVuf" -> %"UVuf" (max %"UVuf").\n",
- "reg_insert",
- __LINE__,
- PL_reg_name[op],
- (UV)(dst - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(src - RExC_emit_start),
- (UV)(dst - RExC_emit_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src));
- Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src));
- }
-#endif
- }
-
-
- place = opnd; /* Op node, where operand used to be. */
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (RExC_offsets) { /* MJD */
- MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n",
- "reginsert",
- __LINE__,
- PL_reg_name[op],
- (UV)(place - RExC_emit_start) > RExC_offsets[0]
- ? "Overwriting end of array!\n" : "OK",
- (UV)(place - RExC_emit_start),
- (UV)(RExC_parse - RExC_start),
- (UV)RExC_offsets[0]));
- Set_Node_Offset(place, RExC_parse);
- Set_Node_Length(place, 1);
- }
-#endif
- src = NEXTOPER(place);
- FILL_ADVANCE_NODE(place, op);
- REH_CALL_COMP_NODE_HOOK(pRExC_state->rx, (place) - 1);
- Zero(src, offset, regnode);
-}
-
-/*
-- regtail - set the next-pointer at the end of a node chain of p to val.
-- SEE ALSO: regtail_study
-*/
-/* TODO: All three parms should be const */
-STATIC void
-S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- if (SIZE_ONLY)
- return;
-
- /* Find last node. */
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tail" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) %s %s\n",
- SvPV_nolen_const(mysv), REG_NODE_NUM(scan),
- (temp == NULL ? "->" : ""),
- (temp == NULL ? PL_reg_name[OP(val)] : "")
- );
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
-
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-}
-
-#ifdef DEBUGGING
-/*
-- regtail_study - set the next-pointer at the end of a node chain of p to val.
-- Look for optimizable sequences at the same time.
-- currently only looks for EXACT chains.
-
-This is expermental code. The idea is to use this routine to perform
-in place optimizations on branches and groups as they are constructed,
-with the long term intention of removing optimization from study_chunk so
-that it is purely analytical.
-
-Currently only used when in DEBUG mode. The macro REGTAIL_STUDY() is used
-to control which is which.
-
-*/
-/* TODO: All four parms should be const */
-
-STATIC U8
-S_regtail_study(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth)
-{
- dVAR;
- register regnode *scan;
- U8 exact = PSEUDO;
-#ifdef EXPERIMENTAL_INPLACESCAN
- I32 min = 0;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTAIL_STUDY;
-
-
- if (SIZE_ONLY)
- return exact;
-
- /* Find last node. */
-
- scan = p;
- for (;;) {
- regnode * const temp = regnext(scan);
-#ifdef EXPERIMENTAL_INPLACESCAN
- if (PL_regkind[OP(scan)] == EXACT)
- if (join_exact(pRExC_state,scan,&min,1,val,depth+1))
- return EXACT;
-#endif
- if ( exact ) {
- switch (OP(scan)) {
- case EXACT:
- case EXACTF:
- case EXACTFL:
- if( exact == PSEUDO )
- exact= OP(scan);
- else if ( exact != OP(scan) )
- exact= 0;
- case NOTHING:
- break;
- default:
- exact= 0;
- }
- }
- DEBUG_PARSE_r({
- SV * const mysv=sv_newmortal();
- DEBUG_PARSE_MSG((scan==p ? "tsdy" : ""));
- regprop(RExC_rx, mysv, scan);
- PerlIO_printf(Perl_debug_log, "~ %s (%d) -> %s\n",
- SvPV_nolen_const(mysv),
- REG_NODE_NUM(scan),
- PL_reg_name[exact]);
- });
- if (temp == NULL)
- break;
- scan = temp;
- }
- DEBUG_PARSE_r({
- SV * const mysv_val=sv_newmortal();
- DEBUG_PARSE_MSG("");
- regprop(RExC_rx, mysv_val, val);
- PerlIO_printf(Perl_debug_log, "~ attach to %s (%"IVdf") offset to %"IVdf"\n",
- SvPV_nolen_const(mysv_val),
- (IV)REG_NODE_NUM(val),
- (IV)(val - scan)
- );
- });
- if (reg_off_by_arg[OP(scan)]) {
- ARG_SET(scan, val - scan);
- }
- else {
- NEXT_OFF(scan) = val - scan;
- }
-
- return exact;
-}
-#endif
-
-/*
- - regcurly - a little FSA that accepts {\d+,?\d*}
- */
-I32
-Perl_regcurly(register const char *s)
-{
- PERL_ARGS_ASSERT_REGCURLY;
-
- if (*s++ != '{')
- return FALSE;
- if (!isDIGIT(*s))
- return FALSE;
- while (isDIGIT(*s))
- s++;
- if (*s == ',')
- s++;
- while (isDIGIT(*s))
- s++;
- if (*s != '}')
- return FALSE;
- return TRUE;
-}
-
-
-/*
- - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form
- */
-#ifdef DEBUGGING
-static void
-S_regdump_extflags(pTHX_ const char *lead, const U32 flags)
-{
- int bit;
- int set=0;
-
- for (bit=0; bit<32; bit++) {
- if (flags & (1<<bit)) {
- if (!set++ && lead)
- PerlIO_printf(Perl_debug_log, "%s",lead);
- PerlIO_printf(Perl_debug_log, "%s ",PL_reg_extflags_name[bit]);
- }
- }
- if (lead) {
- if (set)
- PerlIO_printf(Perl_debug_log, "\n");
- else
- PerlIO_printf(Perl_debug_log, "%s[none-set]\n",lead);
- }
-}
-#endif
-
-void
-Perl_regdump(pTHX_ const regexp *r)
-{
-#ifdef DEBUGGING
- dVAR;
- SV * const sv = sv_newmortal();
- SV *dsv= sv_newmortal();
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGDUMP;
-
- (void)dumpuntil(r, ri->program, ri->program + 1, NULL, NULL, sv, 0, 0);
-
- /* Header fields of interest. */
- if (r->anchored_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->anchored_substr),
- RE_SV_DUMPLEN(r->anchored_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_substr),
- (IV)r->anchored_offset);
- } else if (r->anchored_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->anchored_utf8),
- RE_SV_DUMPLEN(r->anchored_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "anchored utf8 %s%s at %"IVdf" ",
- s, RE_SV_TAIL(r->anchored_utf8),
- (IV)r->anchored_offset);
- }
- if (r->float_substr) {
- RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->float_substr),
- RE_SV_DUMPLEN(r->float_substr), 30);
- PerlIO_printf(Perl_debug_log,
- "floating %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_substr),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- } else if (r->float_utf8) {
- RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->float_utf8),
- RE_SV_DUMPLEN(r->float_utf8), 30);
- PerlIO_printf(Perl_debug_log,
- "floating utf8 %s%s at %"IVdf"..%"UVuf" ",
- s, RE_SV_TAIL(r->float_utf8),
- (IV)r->float_min_offset, (UV)r->float_max_offset);
- }
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log,
- (const char *)
- (r->check_substr == r->float_substr
- && r->check_utf8 == r->float_utf8
- ? "(checking floating" : "(checking anchored"));
- if (r->extflags & RXf_NOSCAN)
- PerlIO_printf(Perl_debug_log, " noscan");
- if (r->extflags & RXf_CHECK_ALL)
- PerlIO_printf(Perl_debug_log, " isall");
- if (r->check_substr || r->check_utf8)
- PerlIO_printf(Perl_debug_log, ") ");
-
- if (ri->regstclass) {
- regprop(r, sv, ri->regstclass);
- PerlIO_printf(Perl_debug_log, "stclass %s ", SvPVX_const(sv));
- }
- if (r->extflags & RXf_ANCH) {
- PerlIO_printf(Perl_debug_log, "anchored");
- if (r->extflags & RXf_ANCH_BOL)
- PerlIO_printf(Perl_debug_log, "(BOL)");
- if (r->extflags & RXf_ANCH_MBOL)
- PerlIO_printf(Perl_debug_log, "(MBOL)");
- if (r->extflags & RXf_ANCH_SBOL)
- PerlIO_printf(Perl_debug_log, "(SBOL)");
- if (r->extflags & RXf_ANCH_GPOS)
- PerlIO_printf(Perl_debug_log, "(GPOS)");
- PerlIO_putc(Perl_debug_log, ' ');
- }
- if (r->extflags & RXf_GPOS_SEEN)
- PerlIO_printf(Perl_debug_log, "GPOS:%"UVuf" ", (UV)r->gofs);
- if (r->intflags & PREGf_SKIP)
- PerlIO_printf(Perl_debug_log, "plus ");
- if (r->intflags & PREGf_IMPLICIT)
- PerlIO_printf(Perl_debug_log, "implicit ");
- PerlIO_printf(Perl_debug_log, "minlen %"IVdf" ", (IV)r->minlen);
- if (r->extflags & RXf_EVAL_SEEN)
- PerlIO_printf(Perl_debug_log, "with eval ");
- PerlIO_printf(Perl_debug_log, "\n");
- DEBUG_FLAGS_r(regdump_extflags("r->extflags: ",r->extflags));
-#else
- PERL_ARGS_ASSERT_REGDUMP;
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(r);
-#endif /* DEBUGGING */
-}
-
-/*
-- regprop - printable representation of opcode
-*/
-#define EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags) \
-STMT_START { \
- if (do_sep) { \
- Perl_sv_catpvf(aTHX_ sv,"%s][%s",PL_colors[1],PL_colors[0]); \
- if (flags & ANYOF_INVERT) \
- /*make sure the invert info is in each */ \
- sv_catpvs(sv, "^"); \
- do_sep = 0; \
- } \
-} STMT_END
-
-void
-Perl_regprop(pTHX_ const regexp *prog, SV *sv, const regnode *o)
-{
-#ifdef DEBUGGING
- dVAR;
- register int k;
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGPROP;
-
- sv_setpvs(sv, "");
-
- if (OP(o) > REGNODE_MAX) /* regnode.type is unsigned */
- /* It would be nice to FAIL() here, but this may be called from
- regexec.c, and it would be hard to supply pRExC_state. */
- Perl_croak(aTHX_ "Corrupted regexp opcode %d > %d", (int)OP(o), (int)REGNODE_MAX);
- sv_catpv(sv, PL_reg_name[OP(o)]); /* Take off const! */
-
- k = PL_regkind[OP(o)];
-
- if (k == EXACT) {
- sv_catpvs(sv, " ");
- /* Using is_utf8_string() (via PERL_PV_UNI_DETECT)
- * is a crude hack but it may be the best for now since
- * we have no flag "this EXACTish node was UTF-8"
- * --jhi */
- pv_pretty(sv, STRING(o), STR_LEN(o), 60, PL_colors[0], PL_colors[1],
- PERL_PV_ESCAPE_UNI_DETECT |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT |
- PERL_PV_PRETTY_NOCLEAR
- );
- } else if (k == TRIE) {
- /* print the details of the trie in dumpuntil instead, as
- * progi->data isn't available here */
- const char op = OP(o);
- const U32 n = ARG(o);
- const reg_ac_data * const ac = IS_TRIE_AC(op) ?
- (reg_ac_data *)progi->data->data[n] :
- NULL;
- const reg_trie_data * const trie
- = (reg_trie_data*)progi->data->data[!IS_TRIE_AC(op) ? n : ac->trie];
-
- Perl_sv_catpvf(aTHX_ sv, "-%s",PL_reg_name[o->flags]);
- DEBUG_TRIE_COMPILE_r(
- Perl_sv_catpvf(aTHX_ sv,
- "<S:%"UVuf"/%"IVdf" W:%"UVuf" L:%"UVuf"/%"UVuf" C:%"UVuf"/%"UVuf">",
- (UV)trie->startstate,
- (IV)trie->statecount-1, /* -1 because of the unused 0 element */
- (UV)trie->wordcount,
- (UV)trie->minlen,
- (UV)trie->maxlen,
- (UV)TRIE_CHARCOUNT(trie),
- (UV)trie->uniquecharcount
- )
- );
- if ( IS_ANYOF_TRIE(op) || trie->bitmap ) {
- int i;
- int rangestart = -1;
- U8* bitmap = IS_ANYOF_TRIE(op) ? (U8*)ANYOF_BITMAP(o) : (U8*)TRIE_BITMAP(trie);
- sv_catpvs(sv, "[");
- for (i = 0; i <= 256; i++) {
- if (i < 256 && BITMAP_TEST(bitmap,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- rangestart = -1;
- }
- }
- sv_catpvs(sv, "]");
- }
-
- } else if (k == CURLY) {
- if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */
- Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o));
- }
- else if (k == WHILEM && o->flags) /* Ordinal/of */
- Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4);
- else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP || OP(o)==ACCEPT) {
- Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */
- if ( RXp_PAREN_NAMES(prog) ) {
- if ( k != REF || OP(o) < NREF) {
- AV *list= MUTABLE_AV(progi->data->data[progi->name_list_idx]);
- SV **name= av_fetch(list, ARG(o), 0 );
- if (name)
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- else {
- AV *list= MUTABLE_AV(progi->data->data[ progi->name_list_idx ]);
- SV *sv_dat= MUTABLE_SV(progi->data->data[ ARG( o ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
- SV **name= av_fetch(list, nums[0], 0 );
- I32 n;
- if (name) {
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- Perl_sv_catpvf(aTHX_ sv, "%s%"IVdf,
- (n ? "," : ""), (IV)nums[n]);
- }
- Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name));
- }
- }
- }
- } else if (k == GOSUB)
- Perl_sv_catpvf(aTHX_ sv, "%d[%+d]", (int)ARG(o),(int)ARG2L(o)); /* Paren and offset */
- else if (k == VERB) {
- if (!o->flags)
- Perl_sv_catpvf(aTHX_ sv, ":%"SVf,
- SVfARG((MUTABLE_SV(progi->data->data[ ARG( o ) ]))));
- } else if (k == LOGICAL)
- Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */
- else if (k == FOLDCHAR)
- Perl_sv_catpvf(aTHX_ sv, "[0x%"UVXf"]", PTR2UV(ARG(o)) );
- else if (k == ANYOF) {
- int i, rangestart = -1;
- const U8 flags = ANYOF_FLAGS(o);
- int do_sep = 0;
-
- /* Should be synchronized with * ANYOF_ #xdefines in regcomp.h */
- static const char * const anyofs[] = {
- "\\w",
- "\\W",
- "\\s",
- "\\S",
- "\\d",
- "\\D",
- "[:alnum:]",
- "[:^alnum:]",
- "[:alpha:]",
- "[:^alpha:]",
- "[:ascii:]",
- "[:^ascii:]",
- "[:cntrl:]",
- "[:^cntrl:]",
- "[:graph:]",
- "[:^graph:]",
- "[:lower:]",
- "[:^lower:]",
- "[:print:]",
- "[:^print:]",
- "[:punct:]",
- "[:^punct:]",
- "[:upper:]",
- "[:^upper:]",
- "[:xdigit:]",
- "[:^xdigit:]",
- "[:space:]",
- "[:^space:]",
- "[:blank:]",
- "[:^blank:]"
- };
-
- if (flags & ANYOF_LOCALE)
- sv_catpvs(sv, "{loc}");
- if (flags & ANYOF_FOLD)
- sv_catpvs(sv, "{i}");
- Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]);
- if (flags & ANYOF_INVERT)
- sv_catpvs(sv, "^");
-
- /* output what the standard cp 0-255 bitmap matches */
- for (i = 0; i <= 256; i++) {
- if (i < 256 && ANYOF_BITMAP_TEST(o,i)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++)
- put_byte(sv, rangestart);
- else {
- put_byte(sv, rangestart);
- sv_catpvs(sv, "-");
- put_byte(sv, i - 1);
- }
- do_sep = 1;
- rangestart = -1;
- }
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
- /* output any special charclass tests (used mostly under use locale) */
- if (o->flags & ANYOF_CLASS)
- for (i = 0; i < (int)(sizeof(anyofs)/sizeof(char*)); i++)
- if (ANYOF_CLASS_TEST(o,i)) {
- sv_catpv(sv, anyofs[i]);
- do_sep = 1;
- }
-
- EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags);
-
- /* output information about the unicode matching */
- if (flags & ANYOF_UNICODE)
- sv_catpvs(sv, "{unicode}");
- else if (flags & ANYOF_UNICODE_ALL)
- sv_catpvs(sv, "{unicode_all}");
-
- {
- SV *lv;
- SV * const sw = regclass_swash(prog, o, FALSE, &lv, 0);
-
- if (lv) {
- if (sw) {
- U8 s[UTF8_MAXBYTES_CASE+1];
-
- for (i = 0; i <= 256; i++) { /* just the first 256 */
- uvchr_to_utf8(s, i);
-
- if (i < 256 && swash_fetch(sw, s, TRUE)) {
- if (rangestart == -1)
- rangestart = i;
- } else if (rangestart != -1) {
- if (i <= rangestart + 3)
- for (; rangestart < i; rangestart++) {
- const U8 * const e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for(p = s; p < e; p++)
- put_byte(sv, *p);
- }
- else {
- const U8 *e = uvchr_to_utf8(s,rangestart);
- U8 *p;
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- sv_catpvs(sv, "-");
- e = uvchr_to_utf8(s, i-1);
- for (p = s; p < e; p++)
- put_byte(sv, *p);
- }
- rangestart = -1;
- }
- }
-
- sv_catpvs(sv, "..."); /* et cetera */
- }
-
- {
- char *s = savesvpv(lv);
- char * const origs = s;
-
- while (*s && *s != '\n')
- s++;
-
- if (*s == '\n') {
- const char * const t = ++s;
-
- while (*s) {
- if (*s == '\n')
- *s = ' ';
- s++;
- }
- if (s[-1] == ' ')
- s[-1] = 0;
-
- sv_catpv(sv, t);
- }
-
- Safefree(origs);
- }
- }
- }
-
- Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]);
- }
- else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH))
- Perl_sv_catpvf(aTHX_ sv, "[%d]", -(o->flags));
-#else
- PERL_UNUSED_CONTEXT;
- PERL_UNUSED_ARG(sv);
- PERL_UNUSED_ARG(o);
- PERL_UNUSED_ARG(prog);
-#endif /* DEBUGGING */
-}
-
-SV *
-Perl_re_intuit_string(pTHX_ REGEXP * const r)
-{ /* Assume that RE_INTUIT is set */
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(r);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_STRING;
- PERL_UNUSED_CONTEXT;
-
- DEBUG_COMPILE_r(
- {
- const char * const s = SvPV_nolen_const(prog->check_substr
- ? prog->check_substr : prog->check_utf8);
-
- if (!PL_colorset) reginitcolors();
- PerlIO_printf(Perl_debug_log,
- "%sUsing REx %ssubstr:%s \"%s%.60s%s%s\"\n",
- PL_colors[4],
- prog->check_substr ? "" : "utf8 ",
- PL_colors[5],PL_colors[0],
- s,
- PL_colors[1],
- (strlen(s) > 60 ? "..." : ""));
- } );
-
- return prog->check_substr ? prog->check_substr : prog->check_utf8;
-}
-
-/*
- pregfree()
-
- handles refcounting and freeing the perl core regexp structure. When
- it is necessary to actually free the structure the first thing it
- does is call the 'free' method of the regexp_engine associated to to
- the regexp, allowing the handling of the void *pprivate; member
- first. (This routine is not overridable by extensions, which is why
- the extensions free is called first.)
-
- See regdupe and regdupe_internal if you change anything here.
-*/
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_pregfree(pTHX_ REGEXP *r)
-{
- SvREFCNT_dec(r);
-}
-
-void
-Perl_pregfree2(pTHX_ REGEXP *rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_PREGFREE2;
-
- if (r->mother_re) {
- ReREFCNT_dec(r->mother_re);
- } else {
- CALLREGFREE_PVT(rx); /* free the private data */
- SvREFCNT_dec(RXp_PAREN_NAMES(r));
- }
- if (r->substrs) {
- SvREFCNT_dec(r->anchored_substr);
- SvREFCNT_dec(r->anchored_utf8);
- SvREFCNT_dec(r->float_substr);
- SvREFCNT_dec(r->float_utf8);
- Safefree(r->substrs);
- }
- RX_MATCH_COPY_FREE(rx);
-#ifdef PERL_OLD_COPY_ON_WRITE
- SvREFCNT_dec(r->saved_copy);
-#endif
- Safefree(r->offs);
-}
-
-/* reg_temp_copy()
-
- This is a hacky workaround to the structural issue of match results
- being stored in the regexp structure which is in turn stored in
- PL_curpm/PL_reg_curpm. The problem is that due to qr// the pattern
- could be PL_curpm in multiple contexts, and could require multiple
- result sets being associated with the pattern simultaneously, such
- as when doing a recursive match with (??{$qr})
-
- The solution is to make a lightweight copy of the regexp structure
- when a qr// is returned from the code executed by (??{$qr}) this
- lightweight copy doesnt actually own any of its data except for
- the starp/end and the actual regexp structure itself.
-
-*/
-
-
-REGEXP *
-Perl_reg_temp_copy (pTHX_ REGEXP *ret_x, REGEXP *rx)
-{
- struct regexp *ret;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- register const I32 npar = r->nparens+1;
-
- PERL_ARGS_ASSERT_REG_TEMP_COPY;
-
- if (!ret_x)
- ret_x = (REGEXP*) newSV_type(SVt_REGEXP);
- ret = (struct regexp *)SvANY(ret_x);
-
- (void)ReREFCNT_inc(rx);
- /* We can take advantage of the existing "copied buffer" mechanism in SVs
- by pointing directly at the buffer, but flagging that the allocated
- space in the copy is zero. As we've just done a struct copy, it's now
- a case of zero-ing that, rather than copying the current length. */
- SvPV_set(ret_x, RX_WRAPPED(rx));
- SvFLAGS(ret_x) |= SvFLAGS(rx) & (SVf_POK|SVp_POK|SVf_UTF8);
- memcpy(&(ret->xpv_cur), &(r->xpv_cur),
- sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur));
- SvLEN_set(ret_x, 0);
- SvSTASH_set(ret_x, NULL);
- SvMAGIC_set(ret_x, NULL);
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if (r->substrs) {
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- SvREFCNT_inc_void(ret->anchored_substr);
- SvREFCNT_inc_void(ret->anchored_utf8);
- SvREFCNT_inc_void(ret->float_substr);
- SvREFCNT_inc_void(ret->float_utf8);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
- }
- RX_MATCH_COPIED_off(ret_x);
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
- ret->mother_re = rx;
-
- return ret_x;
-}
-#endif
-
-/* regfree_internal()
-
- Free the private data in a regexp. This is overloadable by
- extensions. Perl takes care of the regexp structure in pregfree(),
- this covers the *pprivate pointer which technically perldoesnt
- know about, however of course we have to handle the
- regexp_internal structure when no extension is in use.
-
- Note this is called before freeing anything in the regexp
- structure.
- */
-
-void
-Perl_regfree_internal(pTHX_ REGEXP * const rx)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGFREE_INTERNAL;
-
- DEBUG_COMPILE_r({
- if (!PL_colorset)
- reginitcolors();
- {
- SV *dsv= sv_newmortal();
- RE_PV_QUOTED_DECL(s, RX_UTF8(rx),
- dsv, RX_PRECOMP(rx), RX_PRELEN(rx), 60);
- PerlIO_printf(Perl_debug_log,"%sFreeing REx:%s %s\n",
- PL_colors[4],PL_colors[5],s);
- }
- });
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets)
- Safefree(ri->u.offsets); /* 20010421 MJD */
-#endif
- if (ri->data) {
- int n = ri->data->count;
- PAD* new_comppad = NULL;
- PAD* old_comppad;
- PADOFFSET refcnt;
-
- while (--n >= 0) {
- /* If you add a ->what type here, update the comment in regcomp.h */
- switch (ri->data->what[n]) {
- case 's':
- case 'S':
- case 'u':
- SvREFCNT_dec(MUTABLE_SV(ri->data->data[n]));
- break;
- case 'f':
- Safefree(ri->data->data[n]);
- break;
- case 'p':
- new_comppad = MUTABLE_AV(ri->data->data[n]);
- break;
- case 'o':
- if (new_comppad == NULL)
- Perl_croak(aTHX_ "panic: pregfree comppad");
- PAD_SAVE_LOCAL(old_comppad,
- /* Watch out for global destruction's random ordering. */
- (SvTYPE(new_comppad) == SVt_PVAV) ? new_comppad : NULL
- );
- OP_REFCNT_LOCK;
- refcnt = OpREFCNT_dec((OP_4tree*)ri->data->data[n]);
- OP_REFCNT_UNLOCK;
- if (!refcnt)
- op_free((OP_4tree*)ri->data->data[n]);
-
- PAD_RESTORE_LOCAL(old_comppad);
- SvREFCNT_dec(MUTABLE_SV(new_comppad));
- new_comppad = NULL;
- break;
- case 'n':
- break;
- case 'T':
- { /* Aho Corasick add-on structure for a trie node.
- Used in stclass optimization only */
- U32 refcount;
- reg_ac_data *aho=(reg_ac_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --aho->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(aho->states);
- PerlMemShared_free(aho->fail);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- PerlMemShared_free(ri->regstclass);
- }
- }
- break;
- case 't':
- {
- /* trie structure. */
- U32 refcount;
- reg_trie_data *trie=(reg_trie_data*)ri->data->data[n];
- OP_REFCNT_LOCK;
- refcount = --trie->refcount;
- OP_REFCNT_UNLOCK;
- if ( !refcount ) {
- PerlMemShared_free(trie->charmap);
- PerlMemShared_free(trie->states);
- PerlMemShared_free(trie->trans);
- if (trie->bitmap)
- PerlMemShared_free(trie->bitmap);
- if (trie->wordlen)
- PerlMemShared_free(trie->wordlen);
- if (trie->jump)
- PerlMemShared_free(trie->jump);
- if (trie->nextword)
- PerlMemShared_free(trie->nextword);
- /* do this last!!!! */
- PerlMemShared_free(ri->data->data[n]);
- }
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: regfree data code '%c'", ri->data->what[n]);
- }
- }
- Safefree(ri->data->what);
- Safefree(ri->data);
- }
-
- Safefree(ri);
-}
-
-#define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
-#define av_dup_inc(s,t) MUTABLE_AV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define hv_dup_inc(s,t) MUTABLE_HV(SvREFCNT_inc(sv_dup((const SV *)s,t)))
-#define SAVEPVN(p,n) ((p) ? savepvn(p,n) : NULL)
-
-/*
- re_dup - duplicate a regexp.
-
- This routine is expected to clone a given regexp structure. It is only
- compiled under USE_ITHREADS.
-
- After all of the core data stored in struct regexp is duplicated
- the regexp_engine.dupe method is used to copy any private data
- stored in the *pprivate pointer. This allows extensions to handle
- any duplication it needs to do.
-
- See pregfree() and regfree_internal() if you change anything here.
-*/
-#if defined(USE_ITHREADS)
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_re_dup_guts(pTHX_ const REGEXP *sstr, REGEXP *dstr, CLONE_PARAMS *param)
-{
- dVAR;
- I32 npar;
- const struct regexp *r = (const struct regexp *)SvANY(sstr);
- struct regexp *ret = (struct regexp *)SvANY(dstr);
-
- PERL_ARGS_ASSERT_RE_DUP_GUTS;
-
- npar = r->nparens+1;
- Newx(ret->offs, npar, regexp_paren_pair);
- Copy(r->offs, ret->offs, npar, regexp_paren_pair);
- if(ret->swap) {
- /* no need to copy these */
- Newx(ret->swap, npar, regexp_paren_pair);
- }
-
- if (ret->substrs) {
- /* Do it this way to avoid reading from *r after the StructCopy().
- That way, if any of the sv_dup_inc()s dislodge *r from the L1
- cache, it doesn't matter. */
- const bool anchored = r->check_substr
- ? r->check_substr == r->anchored_substr
- : r->check_utf8 == r->anchored_utf8;
- Newx(ret->substrs, 1, struct reg_substr_data);
- StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
-
- ret->anchored_substr = sv_dup_inc(ret->anchored_substr, param);
- ret->anchored_utf8 = sv_dup_inc(ret->anchored_utf8, param);
- ret->float_substr = sv_dup_inc(ret->float_substr, param);
- ret->float_utf8 = sv_dup_inc(ret->float_utf8, param);
-
- /* check_substr and check_utf8, if non-NULL, point to either their
- anchored or float namesakes, and don't hold a second reference. */
-
- if (ret->check_substr) {
- if (anchored) {
- assert(r->check_utf8 == r->anchored_utf8);
- ret->check_substr = ret->anchored_substr;
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- assert(r->check_substr == r->float_substr);
- assert(r->check_utf8 == r->float_utf8);
- ret->check_substr = ret->float_substr;
- ret->check_utf8 = ret->float_utf8;
- }
- } else if (ret->check_utf8) {
- if (anchored) {
- ret->check_utf8 = ret->anchored_utf8;
- } else {
- ret->check_utf8 = ret->float_utf8;
- }
- }
- }
-
- RXp_PAREN_NAMES(ret) = hv_dup_inc(RXp_PAREN_NAMES(ret), param);
-
- if (ret->pprivate)
- RXi_SET(ret,CALLREGDUPE_PVT(dstr,param));
-
- if (RX_MATCH_COPIED(dstr))
- ret->subbeg = SAVEPVN(ret->subbeg, ret->sublen);
- else
- ret->subbeg = NULL;
-#ifdef PERL_OLD_COPY_ON_WRITE
- ret->saved_copy = NULL;
-#endif
-
- if (ret->mother_re) {
- if (SvPVX_const(dstr) == SvPVX_const(ret->mother_re)) {
- /* Our storage points directly to our mother regexp, but that's
- 1: a buffer in a different thread
- 2: something we no longer hold a reference on
- so we need to copy it locally. */
- /* Note we need to sue SvCUR() on our mother_re, because it, in
- turn, may well be pointing to its own mother_re. */
- SvPV_set(dstr, SAVEPVN(SvPVX_const(ret->mother_re),
- SvCUR(ret->mother_re)+1));
- SvLEN_set(dstr, SvCUR(ret->mother_re)+1);
- }
- ret->mother_re = NULL;
- }
- ret->gofs = 0;
-}
-#endif /* PERL_IN_XSUB_RE */
-
-/*
- regdupe_internal()
-
- This is the internal complement to regdupe() which is used to copy
- the structure pointed to by the *pprivate pointer in the regexp.
- This is the core version of the extension overridable cloning hook.
- The regexp structure being duplicated will be copied by perl prior
- to this and will be provided as the regexp *r argument, however
- with the /old/ structures pprivate pointer value. Thus this routine
- may override any copying normally done by perl.
-
- It returns a pointer to the new regexp_internal structure.
-*/
-
-void *
-Perl_regdupe_internal(pTHX_ REGEXP * const rx, CLONE_PARAMS *param)
-{
- dVAR;
- struct regexp *const r = (struct regexp *)SvANY(rx);
- regexp_internal *reti;
- int len, npar;
- RXi_GET_DECL(r,ri);
-
- PERL_ARGS_ASSERT_REGDUPE_INTERNAL;
-
- npar = r->nparens+1;
- len = ProgLen(ri);
-
- Newxc(reti, sizeof(regexp_internal) + len*sizeof(regnode), char, regexp_internal);
- Copy(ri->program, reti->program, len+1, regnode);
-
-
- reti->regstclass = NULL;
-
- if (ri->data) {
- struct reg_data *d;
- const int count = ri->data->count;
- int i;
-
- Newxc(d, sizeof(struct reg_data) + count*sizeof(void *),
- char, struct reg_data);
- Newx(d->what, count, U8);
-
- d->count = count;
- for (i = 0; i < count; i++) {
- d->what[i] = ri->data->what[i];
- switch (d->what[i]) {
- /* legal options are one of: sSfpontTu
- see also regcomp.h and pregfree() */
- case 's':
- case 'S':
- case 'p': /* actually an AV, but the dup function is identical. */
- case 'u': /* actually an HV, but the dup function is identical. */
- d->data[i] = sv_dup_inc((const SV *)ri->data->data[i], param);
- break;
- case 'f':
- /* This is cheating. */
- Newx(d->data[i], 1, struct regnode_charclass_class);
- StructCopy(ri->data->data[i], d->data[i],
- struct regnode_charclass_class);
- reti->regstclass = (regnode*)d->data[i];
- break;
- case 'o':
- /* Compiled op trees are readonly and in shared memory,
- and can thus be shared without duplication. */
- OP_REFCNT_LOCK;
- d->data[i] = (void*)OpREFCNT_inc((OP*)ri->data->data[i]);
- OP_REFCNT_UNLOCK;
- break;
- case 'T':
- /* Trie stclasses are readonly and can thus be shared
- * without duplication. We free the stclass in pregfree
- * when the corresponding reg_ac_data struct is freed.
- */
- reti->regstclass= ri->regstclass;
- /* Fall through */
- case 't':
- OP_REFCNT_LOCK;
- ((reg_trie_data*)ri->data->data[i])->refcount++;
- OP_REFCNT_UNLOCK;
- /* Fall through */
- case 'n':
- d->data[i] = ri->data->data[i];
- break;
- default:
- Perl_croak(aTHX_ "panic: re_dup unknown data code '%c'", ri->data->what[i]);
- }
- }
-
- reti->data = d;
- }
- else
- reti->data = NULL;
-
- reti->name_list_idx = ri->name_list_idx;
-
-#ifdef RE_TRACK_PATTERN_OFFSETS
- if (ri->u.offsets) {
- Newx(reti->u.offsets, 2*len+1, U32);
- Copy(ri->u.offsets, reti->u.offsets, 2*len+1, U32);
- }
-#else
- SetProgLen(reti,len);
-#endif
-
- return (void*)reti;
-}
-
-#endif /* USE_ITHREADS */
-
-#ifndef PERL_IN_XSUB_RE
-
-/*
- - regnext - dig the "next" pointer out of a node
- */
-regnode *
-Perl_regnext(pTHX_ register regnode *p)
-{
- dVAR;
- register I32 offset;
-
- if (!p)
- return(NULL);
-
- offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p));
- if (offset == 0)
- return(NULL);
-
- return(p+offset);
-}
-#endif
-
-STATIC void
-S_re_croak2(pTHX_ const char* pat1,const char* pat2,...)
-{
- va_list args;
- STRLEN l1 = strlen(pat1);
- STRLEN l2 = strlen(pat2);
- char buf[512];
- SV *msv;
- const char *message;
-
- PERL_ARGS_ASSERT_RE_CROAK2;
-
- if (l1 > 510)
- l1 = 510;
- if (l1 + l2 > 510)
- l2 = 510 - l1;
- Copy(pat1, buf, l1 , char);
- Copy(pat2, buf + l1, l2 , char);
- buf[l1 + l2] = '\n';
- buf[l1 + l2 + 1] = '\0';
-#ifdef I_STDARG
- /* ANSI variant takes additional second argument */
- va_start(args, pat2);
-#else
- va_start(args);
-#endif
- msv = vmess(buf, &args);
- va_end(args);
- message = SvPV_const(msv,l1);
- if (l1 > 512)
- l1 = 512;
- Copy(message, buf, l1 , char);
- buf[l1-1] = '\0'; /* Overwrite \n */
- Perl_croak(aTHX_ "%s", buf);
-}
-
-/* XXX Here's a total kludge. But we need to re-enter for swash routines. */
-
-#ifndef PERL_IN_XSUB_RE
-void
-Perl_save_re_context(pTHX)
-{
- dVAR;
-
- struct re_save_state *state;
-
- SAVEVPTR(PL_curcop);
- SSGROW(SAVESTACK_ALLOC_FOR_RE_SAVE_STATE + 1);
-
- state = (struct re_save_state *)(PL_savestack + PL_savestack_ix);
- PL_savestack_ix += SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
- SSPUSHINT(SAVEt_RE_STATE);
-
- Copy(&PL_reg_state, state, 1, struct re_save_state);
-
- PL_reg_start_tmp = 0;
- PL_reg_start_tmpl = 0;
- PL_reg_oldsaved = NULL;
- PL_reg_oldsavedlen = 0;
- PL_reg_maxiter = 0;
- PL_reg_leftiter = 0;
- PL_reg_poscache = NULL;
- PL_reg_poscache_size = 0;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = NULL;
-#endif
-
- /* Save $1..$n (#18107: UTF-8 s/(\w+)/uc($1)/e); AMS 20021106. */
- if (PL_curpm) {
- const REGEXP * const rx = PM_GETRE(PL_curpm);
- if (rx) {
- U32 i;
- for (i = 1; i <= RX_NPARENS(rx); i++) {
- char digits[TYPE_CHARS(long)];
- const STRLEN len = my_snprintf(digits, sizeof(digits), "%lu", (long)i);
- GV *const *const gvp
- = (GV**)hv_fetch(PL_defstash, digits, len, 0);
-
- if (gvp) {
- GV * const gv = *gvp;
- if (SvTYPE(gv) == SVt_PVGV && GvSV(gv))
- save_scalar(gv);
- }
- }
- }
- }
-}
-#endif
-
-static void
-clear_re(pTHX_ void *r)
-{
- dVAR;
- ReREFCNT_dec((REGEXP *)r);
-}
-
-#ifdef DEBUGGING
-
-STATIC void
-S_put_byte(pTHX_ SV *sv, int c)
-{
- PERL_ARGS_ASSERT_PUT_BYTE;
-
- /* Our definition of isPRINT() ignores locales, so only bytes that are
- not part of UTF-8 are considered printable. I assume that the same
- holds for UTF-EBCDIC.
- Also, code point 255 is not printable in either (it's E0 in EBCDIC,
- which Wikipedia says:
-
- EO, or Eight Ones, is an 8-bit EBCDIC character code represented as all
- ones (binary 1111 1111, hexadecimal FF). It is similar, but not
- identical, to the ASCII delete (DEL) or rubout control character.
- ) So the old condition can be simplified to !isPRINT(c) */
- if (!isPRINT(c))
- Perl_sv_catpvf(aTHX_ sv, "\\%o", c);
- else {
- const char string = c;
- if (c == '-' || c == ']' || c == '\\' || c == '^')
- sv_catpvs(sv, "\\");
- sv_catpvn(sv, &string, 1);
- }
-}
-
-
-#define CLEAR_OPTSTART \
- if (optstart) STMT_START { \
- DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log, " (%"IVdf" nodes)\n", (IV)(node - optstart))); \
- optstart=NULL; \
- } STMT_END
-
-#define DUMPUNTIL(b,e) CLEAR_OPTSTART; node=dumpuntil(r,start,(b),(e),last,sv,indent+1,depth+1);
-
-STATIC const regnode *
-S_dumpuntil(pTHX_ const regexp *r, const regnode *start, const regnode *node,
- const regnode *last, const regnode *plast,
- SV* sv, I32 indent, U32 depth)
-{
- dVAR;
- register U8 op = PSEUDO; /* Arbitrary non-END op. */
- register const regnode *next;
- const regnode *optstart= NULL;
-
- RXi_GET_DECL(r,ri);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_DUMPUNTIL;
-
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d : %d - %d - %d\n",indent,node-start,
- last ? last-start : 0,plast ? plast-start : 0);
-#endif
-
- if (plast && plast < last)
- last= plast;
-
- while (PL_regkind[op] != END && (!last || node < last)) {
- /* While that wasn't END last time... */
- NODE_ALIGN(node);
- op = OP(node);
- if (op == CLOSE || op == WHILEM)
- indent--;
- next = regnext((regnode *)node);
-
- /* Where, what. */
- if (OP(node) == OPTIMIZED) {
- if (!optstart && RE_DEBUG_FLAG(RE_DEBUG_COMPILE_OPTIMISE))
- optstart = node;
- else
- goto after_print;
- } else
- CLEAR_OPTSTART;
-
- regprop(r, sv, node);
- PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start),
- (int)(2*indent + 1), "", SvPVX_const(sv));
-
- if (OP(node) != OPTIMIZED) {
- if (next == NULL) /* Next ptr. */
- PerlIO_printf(Perl_debug_log, " (0)");
- else if (PL_regkind[(U8)op] == BRANCH && PL_regkind[OP(next)] != BRANCH )
- PerlIO_printf(Perl_debug_log, " (FAIL)");
- else
- PerlIO_printf(Perl_debug_log, " (%"IVdf")", (IV)(next - start));
- (void)PerlIO_putc(Perl_debug_log, '\n');
- }
-
- after_print:
- if (PL_regkind[(U8)op] == BRANCHJ) {
- assert(next);
- {
- register const regnode *nnode = (OP(next) == LONGJMP
- ? regnext((regnode *)next)
- : next);
- if (last && nnode > last)
- nnode = last;
- DUMPUNTIL(NEXTOPER(NEXTOPER(node)), nnode);
- }
- }
- else if (PL_regkind[(U8)op] == BRANCH) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node), next);
- }
- else if ( PL_regkind[(U8)op] == TRIE ) {
- const regnode *this_trie = node;
- const char op = OP(node);
- const U32 n = ARG(node);
- const reg_ac_data * const ac = op>=AHOCORASICK ?
- (reg_ac_data *)ri->data->data[n] :
- NULL;
- const reg_trie_data * const trie =
- (reg_trie_data*)ri->data->data[op<AHOCORASICK ? n : ac->trie];
-#ifdef DEBUGGING
- AV *const trie_words = MUTABLE_AV(ri->data->data[n + TRIE_WORDS_OFFSET]);
-#endif
- const regnode *nextbranch= NULL;
- I32 word_idx;
- sv_setpvs(sv, "");
- for (word_idx= 0; word_idx < (I32)trie->wordcount; word_idx++) {
- SV ** const elem_ptr = av_fetch(trie_words,word_idx,0);
-
- PerlIO_printf(Perl_debug_log, "%*s%s ",
- (int)(2*(indent+3)), "",
- elem_ptr ? pv_pretty(sv, SvPV_nolen_const(*elem_ptr), SvCUR(*elem_ptr), 60,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*elem_ptr) ? PERL_PV_ESCAPE_UNI : 0) |
- PERL_PV_PRETTY_ELLIPSES |
- PERL_PV_PRETTY_LTGT
- )
- : "???"
- );
- if (trie->jump) {
- U16 dist= trie->jump[word_idx+1];
- PerlIO_printf(Perl_debug_log, "(%"UVuf")\n",
- (UV)((dist ? this_trie + dist : next) - start));
- if (dist) {
- if (!nextbranch)
- nextbranch= this_trie + trie->jump[0];
- DUMPUNTIL(this_trie + dist, nextbranch);
- }
- if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH)
- nextbranch= regnext((regnode *)nextbranch);
- } else {
- PerlIO_printf(Perl_debug_log, "\n");
- }
- }
- if (last && next > last)
- node= last;
- else
- node= next;
- }
- else if ( op == CURLY ) { /* "next" might be very big: optimizer */
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS,
- NEXTOPER(node) + EXTRA_STEP_2ARGS + 1);
- }
- else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) {
- assert(next);
- DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, next);
- }
- else if ( op == PLUS || op == STAR) {
- DUMPUNTIL(NEXTOPER(node), NEXTOPER(node) + 1);
- }
- else if (op == ANYOF) {
- /* arglen 1 + class block */
- node += 1 + ((ANYOF_FLAGS(node) & ANYOF_LARGE)
- ? ANYOF_CLASS_SKIP : ANYOF_SKIP);
- node = NEXTOPER(node);
- }
- else if (PL_regkind[(U8)op] == EXACT) {
- /* Literal string, where present. */
- node += NODE_SZ_STR(node) - 1;
- node = NEXTOPER(node);
- }
- else {
- node = NEXTOPER(node);
- node += regarglen[(U8)op];
- }
- if (op == CURLYX || op == OPEN)
- indent++;
- }
- CLEAR_OPTSTART;
-#ifdef DEBUG_DUMPUNTIL
- PerlIO_printf(Perl_debug_log, "--- %d\n", (int)indent);
-#endif
- return node;
-}
-
-#endif /* DEBUGGING */
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
+++ /dev/null
-/* regexec.c
- */
-
-/*
- * One Ring to rule them all, One Ring to find them
- &
- * [p.v of _The Lord of the Rings_, opening poem]
- * [p.50 of _The Lord of the Rings_, I/iii: "The Shadow of the Past"]
- * [p.254 of _The Lord of the Rings_, II/ii: "The Council of Elrond"]
- */
-
-/* This file contains functions for executing a regular expression. See
- * also regcomp.c which funnily enough, contains functions for compiling
- * a regular expression.
- *
- * This file is also copied at build time to ext/re/re_exec.c, where
- * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT.
- * This causes the main functions to be compiled under new names and with
- * debugging support added, which makes "use re 'debug'" work.
- */
-
-/* NOTE: this is derived from Henry Spencer's regexp code, and should not
- * confused with the original package (see point 3 below). Thanks, Henry!
- */
-
-/* Additional note: this code is very heavily munged from Henry's version
- * in places. In some spots I've traded clarity for efficiency, so don't
- * blame Henry for some of the lack of readability.
- */
-
-/* The names of the functions have been changed from regcomp and
- * regexec to pregcomp and pregexec in order to avoid conflicts
- * with the POSIX routines of the same names.
-*/
-
-#ifdef PERL_EXT_RE_BUILD
-#include "re_top.h"
-#endif
-
-/*
- * pregcomp and pregexec -- regsub and regerror are not used in perl
- *
- * Copyright (c) 1986 by University of Toronto.
- * Written by Henry Spencer. Not derived from licensed software.
- *
- * Permission is granted to anyone to use this software for any
- * purpose on any computer system, and to redistribute it freely,
- * subject to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of
- * this software, no matter how awful, even if they arise
- * from defects in it.
- *
- * 2. The origin of this software must not be misrepresented, either
- * by explicit claim or by omission.
- *
- * 3. Altered versions must be plainly marked as such, and must not
- * be misrepresented as being the original software.
- *
- **** Alterations to Henry's code are...
- ****
- **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- **** by Larry Wall and others
- ****
- **** You may distribute under the terms of either the GNU General Public
- **** License or the Artistic License, as specified in the README file.
- *
- * Beware that some of this code is subtly aware of the way operator
- * precedence is structured in regular expressions. Serious changes in
- * regular-expression syntax might require a total rethink.
- */
-#include "EXTERN.h"
-#define PERL_IN_REGEXEC_C
-#include "perl.h"
-#include "re_defs.h"
-
-#ifdef PERL_IN_XSUB_RE
-# include "re_comp.h"
-#else
-# include "regcomp.h"
-#endif
-
-#define RF_tainted 1 /* tainted information used? */
-#define RF_warned 2 /* warned about big count? */
-
-#define RF_utf8 8 /* Pattern contains multibyte chars? */
-
-#define UTF ((PL_reg_flags & RF_utf8) != 0)
-
-#define RS_init 1 /* eval environment created */
-#define RS_set 2 /* replsv value is set */
-
-#ifndef STATIC
-#define STATIC static
-#endif
-
-#define REGINCLASS(prog,p,c) (ANYOF_FLAGS(p) ? reginclass(prog,p,c,0,0) : ANYOF_BITMAP_TEST(p,*(c)))
-
-/*
- * Forwards.
- */
-
-#define CHR_SVLEN(sv) (do_utf8 ? sv_len_utf8(sv) : SvCUR(sv))
-#define CHR_DIST(a,b) (PL_reg_match_utf8 ? utf8_distance(a,b) : a - b)
-
-#define HOPc(pos,off) \
- (char *)(PL_reg_match_utf8 \
- ? reghop3((U8*)pos, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)) \
- : (U8*)(pos + off))
-#define HOPBACKc(pos, off) \
- (char*)(PL_reg_match_utf8\
- ? reghopmaybe3((U8*)pos, -off, (U8*)PL_bostr) \
- : (pos - off >= PL_bostr) \
- ? (U8*)pos - off \
- : NULL)
-
-#define HOP3(pos,off,lim) (PL_reg_match_utf8 ? reghop3((U8*)(pos), off, (U8*)(lim)) : (U8*)(pos + off))
-#define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim))
-
-/* these are unrolled below in the CCC_TRY_XXX defined */
-#define LOAD_UTF8_CHARCLASS(class,str) STMT_START { \
- if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)str); assert(ok); LEAVE; } } STMT_END
-
-/* Doesn't do an assert to verify that is correct */
-#define LOAD_UTF8_CHARCLASS_NO_CHECK(class) STMT_START { \
- if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)" "); LEAVE; } } STMT_END
-
-#define LOAD_UTF8_CHARCLASS_ALNUM() LOAD_UTF8_CHARCLASS(alnum,"a")
-#define LOAD_UTF8_CHARCLASS_DIGIT() LOAD_UTF8_CHARCLASS(digit,"0")
-#define LOAD_UTF8_CHARCLASS_SPACE() LOAD_UTF8_CHARCLASS(space," ")
-
-#define LOAD_UTF8_CHARCLASS_GCB() /* Grapheme cluster boundaries */ \
- LOAD_UTF8_CHARCLASS(X_begin, " "); \
- LOAD_UTF8_CHARCLASS(X_non_hangul, "A"); \
- /* These are utf8 constants, and not utf-ebcdic constants, so the \
- * assert should likely and hopefully fail on an EBCDIC machine */ \
- LOAD_UTF8_CHARCLASS(X_extend, "\xcc\x80"); /* U+0300 */ \
- \
- /* No asserts are done for these, in case called on an early \
- * Unicode version in which they map to nothing */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_prepend);/* U+0E40 "\xe0\xb9\x80" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_L); /* U+1100 "\xe1\x84\x80" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_LV); /* U+AC00 "\xea\xb0\x80" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_LVT); /* U+AC01 "\xea\xb0\x81" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_LV_LVT_V);/* U+AC01 "\xea\xb0\x81" */\
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_T); /* U+11A8 "\xe1\x86\xa8" */ \
- LOAD_UTF8_CHARCLASS_NO_CHECK(X_V) /* U+1160 "\xe1\x85\xa0" */
-
-/*
- We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test
- so that it is possible to override the option here without having to
- rebuild the entire core. as we are required to do if we change regcomp.h
- which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined.
-*/
-#if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS
-#define BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#endif
-
-#ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS_ALNUM()
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS_SPACE()
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS_DIGIT()
-#define RE_utf8_perl_word PL_utf8_alnum
-#define RE_utf8_perl_space PL_utf8_space
-#define RE_utf8_posix_digit PL_utf8_digit
-#define perl_word alnum
-#define perl_space space
-#define posix_digit digit
-#else
-#define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS(perl_word,"a")
-#define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS(perl_space," ")
-#define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS(posix_digit,"0")
-#define RE_utf8_perl_word PL_utf8_perl_word
-#define RE_utf8_perl_space PL_utf8_perl_space
-#define RE_utf8_posix_digit PL_utf8_posix_digit
-#endif
-
-
-#define CCC_TRY_AFF(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME: \
- if (!nextchr) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if (!(OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if (!(OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-#define CCC_TRY_NEG(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \
- case NAMEL: \
- PL_reg_flags |= RF_tainted; \
- /* FALL THROUGH */ \
- case NAME : \
- if (!nextchr && locinput >= PL_regeol) \
- sayNO; \
- if (do_utf8 && UTF8_IS_CONTINUED(nextchr)) { \
- if (!CAT2(PL_utf8_,CLASS)) { \
- bool ok; \
- ENTER; \
- save_re_context(); \
- ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \
- assert(ok); \
- LEAVE; \
- } \
- if ((OP(scan) == NAME \
- ? (bool)swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, do_utf8) \
- : LCFUNC_utf8((U8*)locinput))) \
- { \
- sayNO; \
- } \
- locinput += PL_utf8skip[nextchr]; \
- nextchr = UCHARAT(locinput); \
- break; \
- } \
- if ((OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \
- sayNO; \
- nextchr = UCHARAT(++locinput); \
- break
-
-
-
-
-
-/* TODO: Combine JUMPABLE and HAS_TEXT to cache OP(rn) */
-
-/* for use after a quantifier and before an EXACT-like node -- japhy */
-/* it would be nice to rework regcomp.sym to generate this stuff. sigh */
-#define JUMPABLE(rn) ( \
- OP(rn) == OPEN || \
- (OP(rn) == CLOSE && (!cur_eval || cur_eval->u.eval.close_paren != ARG(rn))) || \
- OP(rn) == EVAL || \
- OP(rn) == SUSPEND || OP(rn) == IFMATCH || \
- OP(rn) == PLUS || OP(rn) == MINMOD || \
- OP(rn) == KEEPS || (PL_regkind[OP(rn)] == VERB) || \
- (PL_regkind[OP(rn)] == CURLY && ARG1(rn) > 0) \
-)
-#define IS_EXACT(rn) (PL_regkind[OP(rn)] == EXACT)
-
-#define HAS_TEXT(rn) ( IS_EXACT(rn) || PL_regkind[OP(rn)] == REF )
-
-#if 0
-/* Currently these are only used when PL_regkind[OP(rn)] == EXACT so
- we don't need this definition. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT || OP(rn)==REF || OP(rn)==NREF )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF || OP(rn)==REFF || OP(rn)==NREFF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL || OP(rn)==REFFL || OP(rn)==NREFFL )
-
-#else
-/* ... so we use this as its faster. */
-#define IS_TEXT(rn) ( OP(rn)==EXACT )
-#define IS_TEXTF(rn) ( OP(rn)==EXACTF )
-#define IS_TEXTFL(rn) ( OP(rn)==EXACTFL )
-
-#endif
-
-/*
- Search for mandatory following text node; for lookahead, the text must
- follow but for lookbehind (rn->flags != 0) we skip to the next step.
-*/
-#define FIND_NEXT_IMPT(rn) STMT_START { \
- while (JUMPABLE(rn)) { \
- const OPCODE type = OP(rn); \
- if (type == SUSPEND || PL_regkind[type] == CURLY) \
- rn = NEXTOPER(NEXTOPER(rn)); \
- else if (type == PLUS) \
- rn = NEXTOPER(rn); \
- else if (type == IFMATCH) \
- rn = (rn->flags == 0) ? NEXTOPER(NEXTOPER(rn)) : rn + ARG(rn); \
- else rn += NEXT_OFF(rn); \
- } \
-} STMT_END
-
-
-static void restore_pos(pTHX_ void *arg);
-
-STATIC CHECKPOINT
-S_regcppush(pTHX_ I32 parenfloor)
-{
- dVAR;
- const int retval = PL_savestack_ix;
-#define REGCP_PAREN_ELEMS 4
- const int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS;
- int p;
- GET_RE_DEBUG_FLAGS_DECL;
-
- if (paren_elems_to_push < 0)
- Perl_croak(aTHX_ "panic: paren_elems_to_push < 0");
-
-#define REGCP_OTHER_ELEMS 7
- SSGROW(paren_elems_to_push + REGCP_OTHER_ELEMS);
-
- for (p = PL_regsize; p > parenfloor; p--) {
-/* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */
- SSPUSHINT(PL_regoffs[p].end);
- SSPUSHINT(PL_regoffs[p].start);
- SSPUSHPTR(PL_reg_start_tmp[p]);
- SSPUSHINT(p);
- DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log,
- " saving \\%"UVuf" %"IVdf"(%"IVdf")..%"IVdf"\n",
- (UV)p, (IV)PL_regoffs[p].start,
- (IV)(PL_reg_start_tmp[p] - PL_bostr),
- (IV)PL_regoffs[p].end
- ));
- }
-/* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */
- SSPUSHPTR(PL_regoffs);
- SSPUSHINT(PL_regsize);
- SSPUSHINT(*PL_reglastparen);
- SSPUSHINT(*PL_reglastcloseparen);
- SSPUSHPTR(PL_reginput);
-#define REGCP_FRAME_ELEMS 2
-/* REGCP_FRAME_ELEMS are part of the REGCP_OTHER_ELEMS and
- * are needed for the regexp context stack bookkeeping. */
- SSPUSHINT(paren_elems_to_push + REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- SSPUSHINT(SAVEt_REGCONTEXT); /* Magic cookie. */
-
- return retval;
-}
-
-/* These are needed since we do not localize EVAL nodes: */
-#define REGCP_SET(cp) \
- DEBUG_STATE_r( \
- PerlIO_printf(Perl_debug_log, \
- " Setting an EVAL scope, savestack=%"IVdf"\n", \
- (IV)PL_savestack_ix)); \
- cp = PL_savestack_ix
-
-#define REGCP_UNWIND(cp) \
- DEBUG_STATE_r( \
- if (cp != PL_savestack_ix) \
- PerlIO_printf(Perl_debug_log, \
- " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \
- (IV)(cp), (IV)PL_savestack_ix)); \
- regcpblow(cp)
-
-STATIC char *
-S_regcppop(pTHX_ const regexp *rex)
-{
- dVAR;
- U32 i;
- char *input;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGCPPOP;
-
- /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */
- i = SSPOPINT;
- assert(i == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */
- i = SSPOPINT; /* Parentheses elements to pop. */
- input = (char *) SSPOPPTR;
- *PL_reglastcloseparen = SSPOPINT;
- *PL_reglastparen = SSPOPINT;
- PL_regsize = SSPOPINT;
- PL_regoffs=(regexp_paren_pair *) SSPOPPTR;
-
-
- /* Now restore the parentheses context. */
- for (i -= (REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS);
- i > 0; i -= REGCP_PAREN_ELEMS) {
- I32 tmps;
- U32 paren = (U32)SSPOPINT;
- PL_reg_start_tmp[paren] = (char *) SSPOPPTR;
- PL_regoffs[paren].start = SSPOPINT;
- tmps = SSPOPINT;
- if (paren <= *PL_reglastparen)
- PL_regoffs[paren].end = tmps;
- DEBUG_BUFFERS_r(
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n",
- (UV)paren, (IV)PL_regoffs[paren].start,
- (IV)(PL_reg_start_tmp[paren] - PL_bostr),
- (IV)PL_regoffs[paren].end,
- (paren > *PL_reglastparen ? "(no)" : ""));
- );
- }
- DEBUG_BUFFERS_r(
- if (*PL_reglastparen + 1 <= rex->nparens) {
- PerlIO_printf(Perl_debug_log,
- " restoring \\%"IVdf"..\\%"IVdf" to undef\n",
- (IV)(*PL_reglastparen + 1), (IV)rex->nparens);
- }
- );
-#if 1
- /* It would seem that the similar code in regtry()
- * already takes care of this, and in fact it is in
- * a better location to since this code can #if 0-ed out
- * but the code in regtry() is needed or otherwise tests
- * requiring null fields (pat.t#187 and split.t#{13,14}
- * (as of patchlevel 7877) will fail. Then again,
- * this code seems to be necessary or otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * --jhi updated by dapm */
- for (i = *PL_reglastparen + 1; i <= rex->nparens; i++) {
- if (i > PL_regsize)
- PL_regoffs[i].start = -1;
- PL_regoffs[i].end = -1;
- }
-#endif
- return input;
-}
-
-#define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */
-
-/*
- * pregexec and friends
- */
-
-#ifndef PERL_IN_XSUB_RE
-/*
- - pregexec - match a regexp against a string
- */
-I32
-Perl_pregexec(pTHX_ REGEXP * const prog, char* stringarg, register char *strend,
- char *strbeg, I32 minend, SV *screamer, U32 nosave)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* nosave: For optimizations. */
-{
- PERL_ARGS_ASSERT_PREGEXEC;
-
- return
- regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL,
- nosave ? 0 : REXEC_COPY_STR);
-}
-#endif
-
-/*
- * Need to implement the following flags for reg_anch:
- *
- * USE_INTUIT_NOML - Useful to call re_intuit_start() first
- * USE_INTUIT_ML
- * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer
- * INTUIT_AUTORITATIVE_ML
- * INTUIT_ONCE_NOML - Intuit can match in one location only.
- * INTUIT_ONCE_ML
- *
- * Another flag for this function: SECOND_TIME (so that float substrs
- * with giant delta may be not rechecked).
- */
-
-/* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */
-
-/* If SCREAM, then SvPVX_const(sv) should be compatible with strpos and strend.
- Otherwise, only SvCUR(sv) is used to get strbeg. */
-
-/* XXXX We assume that strpos is strbeg unless sv. */
-
-/* XXXX Some places assume that there is a fixed substring.
- An update may be needed if optimizer marks as "INTUITable"
- RExen without fixed substrings. Similarly, it is assumed that
- lengths of all the strings are no more than minlen, thus they
- cannot come from lookahead.
- (Or minlen should take into account lookahead.)
- NOTE: Some of this comment is not correct. minlen does now take account
- of lookahead/behind. Further research is required. -- demerphq
-
-*/
-
-/* A failure to find a constant substring means that there is no need to make
- an expensive call to REx engine, thus we celebrate a failure. Similarly,
- finding a substring too deep into the string means that less calls to
- regtry() should be needed.
-
- REx compiler's optimizer found 4 possible hints:
- a) Anchored substring;
- b) Fixed substring;
- c) Whether we are anchored (beginning-of-line or \G);
- d) First node (of those at offset 0) which may distingush positions;
- We use a)b)d) and multiline-part of c), and try to find a position in the
- string which does not contradict any of them.
- */
-
-/* Most of decisions we do here should have been done at compile time.
- The nodes of the REx which we used for the search should have been
- deleted from the finite automaton. */
-
-char *
-Perl_re_intuit_start(pTHX_ REGEXP * const rx, SV *sv, char *strpos,
- char *strend, const U32 flags, re_scream_pos_data *data)
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- register I32 start_shift = 0;
- /* Should be nonnegative! */
- register I32 end_shift = 0;
- register char *s;
- register SV *check;
- char *strbeg;
- char *t;
- const bool do_utf8 = (sv && SvUTF8(sv)) ? 1 : 0; /* if no sv we have to assume bytes */
- I32 ml_anch;
- register char *other_last = NULL; /* other substr checked before this */
- char *check_at = NULL; /* check substr found at this pos */
- const I32 multiline = prog->extflags & RXf_PMf_MULTILINE;
- RXi_GET_DECL(prog,progi);
-#ifdef DEBUGGING
- const char * const i_strpos = strpos;
-#endif
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_RE_INTUIT_START;
-
- RX_MATCH_UTF8_set(rx,do_utf8);
-
- if (RX_UTF8(rx)) {
- PL_reg_flags |= RF_utf8;
- }
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, strpos, strend,
- sv ? "Guessing start of match in sv for"
- : "Guessing start of match in string for");
- );
-
- /* CHR_DIST() would be more correct here but it makes things slow. */
- if (prog->minlen > strend - strpos) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short... [re_intuit_start]\n"));
- goto fail;
- }
-
- strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos;
- PL_regeol = strend;
- if (do_utf8) {
- if (!prog->check_utf8 && prog->check_substr)
- to_utf8_substr(prog);
- check = prog->check_utf8;
- } else {
- if (!prog->check_substr && prog->check_utf8)
- to_byte_substr(prog);
- check = prog->check_substr;
- }
- if (check == &PL_sv_undef) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Non-utf8 string cannot match utf8 check string\n"));
- goto fail;
- }
- if (prog->extflags & RXf_ANCH) { /* Match at beg-of-str or after \n */
- ml_anch = !( (prog->extflags & RXf_ANCH_SINGLE)
- || ( (prog->extflags & RXf_ANCH_BOL)
- && !multiline ) ); /* Check after \n? */
-
- if (!ml_anch) {
- if ( !(prog->extflags & RXf_ANCH_GPOS) /* Checked by the caller */
- && !(prog->intflags & PREGf_IMPLICIT) /* not a real BOL */
- /* SvCUR is not set on references: SvRV and SvPVX_const overlap */
- && sv && !SvROK(sv)
- && (strpos != strbeg)) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not at start...\n"));
- goto fail;
- }
- if (prog->check_offset_min == prog->check_offset_max &&
- !(prog->extflags & RXf_CANY_SEEN)) {
- /* Substring at constant offset from beg-of-str... */
- I32 slen;
-
- s = HOP3c(strpos, prog->check_offset_min, strend);
-
- if (SvTAIL(check)) {
- slen = SvCUR(check); /* >= 1 */
-
- if ( strend - s > slen || strend - s < slen - 1
- || (strend - s == slen && strend[-1] != '\n')) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String too long...\n"));
- goto fail_finish;
- }
- /* Now should match s[0..slen-2] */
- slen--;
- if (slen && (*SvPVX_const(check) != *s
- || (slen > 1
- && memNE(SvPVX_const(check), s, slen)))) {
- report_neq:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String not equal...\n"));
- goto fail_finish;
- }
- }
- else if (*SvPVX_const(check) != *s
- || ((slen = SvCUR(check)) > 1
- && memNE(SvPVX_const(check), s, slen)))
- goto report_neq;
- check_at = s;
- goto success_at_start;
- }
- }
- /* Match is anchored, but substr is not anchored wrt beg-of-str. */
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- if (!ml_anch) {
- const I32 end = prog->check_offset_max + CHR_SVLEN(check)
- - (SvTAIL(check) != 0);
- const I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end;
-
- if (end_shift < eshift)
- end_shift = eshift;
- }
- }
- else { /* Can match at random position */
- ml_anch = 0;
- s = strpos;
- start_shift = prog->check_offset_min; /* okay to underestimate on CC */
- end_shift = prog->check_end_shift;
-
- /* end shift should be non negative here */
- }
-
-#ifdef QDEBUGGING /* 7/99: reports of failure (with the older version) */
- if (end_shift < 0)
- Perl_croak(aTHX_ "panic: end_shift: %"IVdf" pattern:\n%s\n ",
- (IV)end_shift, RX_PRECOMP(prog));
-#endif
-
- restart:
- /* Find a possible match in the region s..strend by looking for
- the "check" substring in the region corrected by start/end_shift. */
-
- {
- I32 srch_start_shift = start_shift;
- I32 srch_end_shift = end_shift;
- if (srch_start_shift < 0 && strbeg - s > srch_start_shift) {
- srch_end_shift -= ((strbeg - s) - srch_start_shift);
- srch_start_shift = strbeg - s;
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "Check offset min: %"IVdf" Start shift: %"IVdf" End shift %"IVdf" Real End Shift: %"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)srch_start_shift,
- (IV)srch_end_shift,
- (IV)prog->check_end_shift);
- });
-
- if (flags & REXEC_SCREAM) {
- I32 p = -1; /* Internal iterator of scream. */
- I32 * const pp = data ? data->scream_pos : &p;
-
- if (PL_screamfirst[BmRARE(check)] >= 0
- || ( BmRARE(check) == '\n'
- && (BmPREVIOUS(check) == SvCUR(check) - 1)
- && SvTAIL(check) ))
- s = screaminstr(sv, check,
- srch_start_shift + (s - strbeg), srch_end_shift, pp, 0);
- else
- goto fail_finish;
- /* we may be pointing at the wrong string */
- if (s && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- if (data)
- *data->scream_olds = s;
- }
- else {
- U8* start_point;
- U8* end_point;
- if (prog->extflags & RXf_CANY_SEEN) {
- start_point= (U8*)(s + srch_start_shift);
- end_point= (U8*)(strend - srch_end_shift);
- } else {
- start_point= HOP3(s, srch_start_shift, srch_start_shift < 0 ? strbeg : strend);
- end_point= HOP3(strend, -srch_end_shift, strbeg);
- }
- DEBUG_OPTIMISE_MORE_r({
- PerlIO_printf(Perl_debug_log, "fbm_instr len=%d str=<%.*s>\n",
- (int)(end_point - start_point),
- (int)(end_point - start_point) > 20 ? 20 : (int)(end_point - start_point),
- start_point);
- });
-
- s = fbm_instr( start_point, end_point,
- check, multiline ? FBMrf_MULTILINE : 0);
- }
- }
- /* Update the count-of-usability, remove useless subpatterns,
- unshift s. */
-
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(check), RE_SV_DUMPLEN(check), 30);
- PerlIO_printf(Perl_debug_log, "%s %s substr %s%s%s",
- (s ? "Found" : "Did not find"),
- (check == (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)
- ? "anchored" : "floating"),
- quoted,
- RE_SV_TAIL(check),
- (s ? " at offset " : "...\n") );
- });
-
- if (!s)
- goto fail_finish;
- /* Finish the diagnostic message */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) );
-
- /* XXX dmq: first branch is for positive lookbehind...
- Our check string is offset from the beginning of the pattern.
- So we need to do any stclass tests offset forward from that
- point. I think. :-(
- */
-
-
-
- check_at=s;
-
-
- /* Got a candidate. Check MBOL anchoring, and the *other* substr.
- Start with the other substr.
- XXXX no SCREAM optimization yet - and a very coarse implementation
- XXXX /ttx+/ results in anchored="ttx", floating="x". floating will
- *always* match. Probably should be marked during compile...
- Probably it is right to do no SCREAM here...
- */
-
- if (do_utf8 ? (prog->float_utf8 && prog->anchored_utf8)
- : (prog->float_substr && prog->anchored_substr))
- {
- /* Take into account the "other" substring. */
- /* XXXX May be hopelessly wrong for UTF... */
- if (!other_last)
- other_last = strpos;
- if (check == (do_utf8 ? prog->float_utf8 : prog->float_substr)) {
- do_other_anchored:
- {
- char * const last = HOP3c(s, -start_shift, strbeg);
- char *last1, *last2;
- char * const saved_s = s;
- SV* must;
-
- t = s - prog->check_offset_max;
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -(prog->check_offset_max), (U8*)strpos))
- && t > strpos)))
- NOOP;
- else
- t = strpos;
- t = HOP3c(t, prog->anchored_offset, strend);
- if (t < other_last) /* These positions already checked */
- t = other_last;
- last2 = last1 = HOP3c(strend, -prog->minlen, strbeg);
- if (last < last1)
- last1 = last;
- /* XXXX It is not documented what units *_offsets are in.
- We assume bytes, but this is clearly wrong.
- Meaning this code needs to be carefully reviewed for errors.
- dmq.
- */
-
- /* On end-of-str: see comment below. */
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->anchored_utf8); /* for debug */
- }
- else
- s = fbm_instr(
- (unsigned char*)t,
- HOP3(HOP3(last1, prog->anchored_offset, strend)
- + SvCUR(must), -(SvTAIL(must)!=0), strbeg),
- must,
- multiline ? FBMrf_MULTILINE : 0
- );
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s anchored substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
-
-
- if (!s) {
- if (last1 >= last2) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying floating at offset %ld...\n",
- (long)(HOP3c(saved_s, 1, strend) - i_strpos)));
- other_last = HOP3c(last1, prog->anchored_offset+1, strend);
- s = HOP3c(last, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- t = HOP3c(s, -prog->anchored_offset, strbeg);
- other_last = HOP3c(s, 1, strend);
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
- else { /* Take into account the floating substring. */
- char *last, *last1;
- char * const saved_s = s;
- SV* must;
-
- t = HOP3c(s, -start_shift, strbeg);
- last1 = last =
- HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg);
- if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset)
- last = HOP3c(t, prog->float_max_offset, strend);
- s = HOP3c(t, prog->float_min_offset, strend);
- if (s < other_last)
- s = other_last;
- /* XXXX It is not documented what units *_offsets are in. Assume bytes. */
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- /* fbm_instr() takes into account exact value of end-of-str
- if the check is SvTAIL(ed). Since false positives are OK,
- and end-of-str is not later than strend we are OK. */
- if (must == &PL_sv_undef) {
- s = (char*)NULL;
- DEBUG_r(must = prog->float_utf8); /* for debug message */
- }
- else
- s = fbm_instr((unsigned char*)s,
- (unsigned char*)last + SvCUR(must)
- - (SvTAIL(must)!=0),
- must, multiline ? FBMrf_MULTILINE : 0);
- DEBUG_EXECUTE_r({
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "%s floating substr %s%s",
- (s ? "Found" : "Contradicts"),
- quoted, RE_SV_TAIL(must));
- });
- if (!s) {
- if (last1 == last) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", giving up...\n"));
- goto fail_finish;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- ", trying anchored starting at offset %ld...\n",
- (long)(saved_s + 1 - i_strpos)));
- other_last = last;
- s = HOP3c(t, 1, strend);
- goto restart;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n",
- (long)(s - i_strpos)));
- other_last = s; /* Fix this later. --Hugo */
- s = saved_s;
- if (t == strpos)
- goto try_at_start;
- goto try_at_offset;
- }
- }
- }
-
-
- t= (char*)HOP3( s, -prog->check_offset_max, (prog->check_offset_max<0) ? strend : strpos);
-
- DEBUG_OPTIMISE_MORE_r(
- PerlIO_printf(Perl_debug_log,
- "Check offset min:%"IVdf" max:%"IVdf" S:%"IVdf" t:%"IVdf" D:%"IVdf" end:%"IVdf"\n",
- (IV)prog->check_offset_min,
- (IV)prog->check_offset_max,
- (IV)(s-strpos),
- (IV)(t-strpos),
- (IV)(t-s),
- (IV)(strend-strpos)
- )
- );
-
- if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */
- && (!do_utf8
- || ((t = (char*)reghopmaybe3((U8*)s, -prog->check_offset_max, (U8*) ((prog->check_offset_max<0) ? strend : strpos)))
- && t > strpos)))
- {
- /* Fixed substring is found far enough so that the match
- cannot start at strpos. */
- try_at_offset:
- if (ml_anch && t[-1] != '\n') {
- /* Eventually fbm_*() should handle this, but often
- anchored_offset is not 0, so this check will not be wasted. */
- /* XXXX In the code below we prefer to look for "^" even in
- presence of anchored substrings. And we search even
- beyond the found float position. These pessimizations
- are historical artefacts only. */
- find_anchor:
- while (t < strend - prog->minlen) {
- if (*t == '\n') {
- if (t < check_at - prog->check_offset_min) {
- if (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) {
- /* Since we moved from the found position,
- we definitely contradict the found anchored
- substr. Due to the above check we do not
- contradict "check" substr.
- Thus we can arrive here only if check substr
- is float. Redo checking for "other"=="fixed".
- */
- strpos = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset)));
- goto do_other_anchored;
- }
- /* We don't contradict the found floating substring. */
- /* XXXX Why not check for STCLASS? */
- s = t + 1;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(s - i_strpos)));
- goto set_useful;
- }
- /* Position contradicts check-string */
- /* XXXX probably better to look for check-string
- than for "\n", so one should lower the limit for t? */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t + 1 - i_strpos)));
- other_last = strpos = s = t + 1;
- goto restart;
- }
- t++;
- }
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- goto fail_finish;
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n",
- PL_colors[0], PL_colors[1]));
- }
- s = t;
- set_useful:
- ++BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr); /* hooray/5 */
- }
- else {
- /* The found string does not prohibit matching at strpos,
- - no optimization of calling REx engine can be performed,
- unless it was an MBOL and we are not after MBOL,
- or a future STCLASS check will fail this. */
- try_at_start:
- /* Even in this situation we may use MBOL flag if strpos is offset
- wrt the start of the string. */
- if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */
- && (strpos != strbeg) && strpos[-1] != '\n'
- /* May be due to an implicit anchor of m{.*foo} */
- && !(prog->intflags & PREGf_IMPLICIT))
- {
- t = strpos;
- goto find_anchor;
- }
- DEBUG_EXECUTE_r( if (ml_anch)
- PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n",
- (long)(strpos - i_strpos), PL_colors[0], PL_colors[1]);
- );
- success_at_start:
- if (!(prog->intflags & PREGf_NAUGHTY) /* XXXX If strpos moved? */
- && (do_utf8 ? (
- prog->check_utf8 /* Could be deleted already */
- && --BmUSEFUL(prog->check_utf8) < 0
- && (prog->check_utf8 == prog->float_utf8)
- ) : (
- prog->check_substr /* Could be deleted already */
- && --BmUSEFUL(prog->check_substr) < 0
- && (prog->check_substr == prog->float_substr)
- )))
- {
- /* If flags & SOMETHING - do not do it many times on the same match */
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n"));
- /* XXX Does the destruction order has to change with do_utf8? */
- SvREFCNT_dec(do_utf8 ? prog->check_utf8 : prog->check_substr);
- SvREFCNT_dec(do_utf8 ? prog->check_substr : prog->check_utf8);
- prog->check_substr = prog->check_utf8 = NULL; /* disable */
- prog->float_substr = prog->float_utf8 = NULL; /* clear */
- check = NULL; /* abort */
- s = strpos;
- /* XXXX This is a remnant of the old implementation. It
- looks wasteful, since now INTUIT can use many
- other heuristics. */
- prog->extflags &= ~RXf_USE_INTUIT;
- }
- else
- s = strpos;
- }
-
- /* Last resort... */
- /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */
- /* trie stclasses are too expensive to use here, we are better off to
- leave it to regmatch itself */
- if (progi->regstclass && PL_regkind[OP(progi->regstclass)]!=TRIE) {
- /* minlen == 0 is possible if regstclass is \b or \B,
- and the fixed substr is ''$.
- Since minlen is already taken into account, s+1 is before strend;
- accidentally, minlen >= 1 guaranties no false positives at s + 1
- even for \b or \B. But (minlen? 1 : 0) below assumes that
- regstclass does not come from lookahead... */
- /* If regstclass takes bytelength more than 1: If charlength==1, OK.
- This leaves EXACTF only, which is dealt with in find_byclass(). */
- const U8* const str = (U8*)STRING(progi->regstclass);
- const int cl_l = (PL_regkind[OP(progi->regstclass)] == EXACT
- ? CHR_DIST(str+STR_LEN(progi->regstclass), str)
- : 1);
- char * endpos;
- if (prog->anchored_substr || prog->anchored_utf8 || ml_anch)
- endpos= HOP3c(s, (prog->minlen ? cl_l : 0), strend);
- else if (prog->float_substr || prog->float_utf8)
- endpos= HOP3c(HOP3c(check_at, -start_shift, strbeg), cl_l, strend);
- else
- endpos= strend;
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %"IVdf" s: %"IVdf" endpos: %"IVdf"\n",
- (IV)start_shift, (IV)(check_at - strbeg), (IV)(s - strbeg), (IV)(endpos - strbeg)));
-
- t = s;
- s = find_byclass(prog, progi->regstclass, s, endpos, NULL);
- if (!s) {
-#ifdef DEBUGGING
- const char *what = NULL;
-#endif
- if (endpos == strend) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "This position contradicts STCLASS...\n") );
- if ((prog->extflags & RXf_ANCH) && !ml_anch)
- goto fail;
- /* Contradict one of substrings */
- if (prog->anchored_substr || prog->anchored_utf8) {
- if ((do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) == check) {
- DEBUG_EXECUTE_r( what = "anchored" );
- hop_and_restart:
- s = HOP3c(t, 1, strend);
- if (s + start_shift + end_shift > strend) {
- /* XXXX Should be taken into account earlier? */
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Could not match STCLASS...\n") );
- goto fail;
- }
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for %s substr starting at offset %ld...\n",
- what, (long)(s + start_shift - i_strpos)) );
- goto restart;
- }
- /* Have both, check_string is floating */
- if (t + start_shift >= check_at) /* Contradicts floating=check */
- goto retry_floating_check;
- /* Recheck anchored substring, but not floating... */
- s = check_at;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for anchored substr starting at offset %ld...\n",
- (long)(other_last - i_strpos)) );
- goto do_other_anchored;
- }
- /* Another way we could have checked stclass at the
- current position only: */
- if (ml_anch) {
- s = t = t + 1;
- if (!check)
- goto giveup;
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "Looking for /%s^%s/m starting at offset %ld...\n",
- PL_colors[0], PL_colors[1], (long)(t - i_strpos)) );
- goto try_at_offset;
- }
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) /* Could have been deleted */
- goto fail;
- /* Check is floating subtring. */
- retry_floating_check:
- t = check_at - start_shift;
- DEBUG_EXECUTE_r( what = "floating" );
- goto hop_and_restart;
- }
- if (t != s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "By STCLASS: moving %ld --> %ld\n",
- (long)(t - i_strpos), (long)(s - i_strpos))
- );
- }
- else {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "Does not contradict STCLASS...\n");
- );
- }
- }
- giveup:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n",
- PL_colors[4], (check ? "Guessed" : "Giving up"),
- PL_colors[5], (long)(s - i_strpos)) );
- return s;
-
- fail_finish: /* Substring not found */
- if (prog->check_substr || prog->check_utf8) /* could be removed already */
- BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr) += 5; /* hooray */
- fail:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n",
- PL_colors[4], PL_colors[5]));
- return NULL;
-}
-
-#define DECL_TRIE_TYPE(scan) \
- const enum { trie_plain, trie_utf8, trie_utf8_fold, trie_latin_utf8_fold } \
- trie_type = (scan->flags != EXACT) \
- ? (do_utf8 ? trie_utf8_fold : (UTF ? trie_latin_utf8_fold : trie_plain)) \
- : (do_utf8 ? trie_utf8 : trie_plain)
-
-#define REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, uscan, len, \
-uvc, charid, foldlen, foldbuf, uniflags) STMT_START { \
- switch (trie_type) { \
- case trie_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_latin_utf8_fold: \
- if ( foldlen>0 ) { \
- uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \
- foldlen -= len; \
- uscan += len; \
- len=0; \
- } else { \
- len = 1; \
- uvc = to_uni_fold( *(U8*)uc, foldbuf, &foldlen ); \
- foldlen -= UNISKIP( uvc ); \
- uscan = foldbuf + UNISKIP( uvc ); \
- } \
- break; \
- case trie_utf8: \
- uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \
- break; \
- case trie_plain: \
- uvc = (UV)*uc; \
- len = 1; \
- } \
- if (uvc < 256) { \
- charid = trie->charmap[ uvc ]; \
- } \
- else { \
- charid = 0; \
- if (widecharmap) { \
- SV** const svpp = hv_fetch(widecharmap, \
- (char*)&uvc, sizeof(UV), 0); \
- if (svpp) \
- charid = (U16)SvIV(*svpp); \
- } \
- } \
-} STMT_END
-
-#define REXEC_FBC_EXACTISH_CHECK(CoNd) \
-{ \
- char *my_strend= (char *)strend; \
- if ( (CoNd) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8, \
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- else { \
- U8 foldbuf[UTF8_MAXBYTES_CASE+1]; \
- uvchr_to_utf8(tmpbuf, c); \
- f = to_utf8_fold(tmpbuf, foldbuf, &foldlen); \
- if ( f != c \
- && (f == c1 || f == c2) \
- && (ln == len || \
- !ibcmp_utf8(s, &my_strend, 0, do_utf8,\
- m, NULL, ln, (bool)UTF)) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- } \
-} \
-s += len
-
-#define REXEC_FBC_EXACTISH_SCAN(CoNd) \
-STMT_START { \
- while (s <= e) { \
- if ( (CoNd) \
- && (ln == 1 || !(OP(c) == EXACTF \
- ? ibcmp(s, m, ln) \
- : ibcmp_locale(s, m, ln))) \
- && (!reginfo || regtry(reginfo, &s)) ) \
- goto got_it; \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_SCAN(CoDe) \
-STMT_START { \
- while (s + (uskip = UTF8SKIP(s)) <= strend) { \
- CoDe \
- s += uskip; \
- } \
-} STMT_END
-
-#define REXEC_FBC_SCAN(CoDe) \
-STMT_START { \
- while (s < strend) { \
- CoDe \
- s++; \
- } \
-} STMT_END
-
-#define REXEC_FBC_UTF8_CLASS_SCAN(CoNd) \
-REXEC_FBC_UTF8_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_CLASS_SCAN(CoNd) \
-REXEC_FBC_SCAN( \
- if (CoNd) { \
- if (tmp && (!reginfo || regtry(reginfo, &s))) \
- goto got_it; \
- else \
- tmp = doevery; \
- } \
- else \
- tmp = 1; \
-)
-
-#define REXEC_FBC_TRYIT \
-if ((!reginfo || regtry(reginfo, &s))) \
- goto got_it
-
-#define REXEC_FBC_CSCAN(CoNdUtF8,CoNd) \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_PRELOAD(UtFpReLoAd,CoNdUtF8,CoNd) \
- if (do_utf8) { \
- UtFpReLoAd; \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define REXEC_FBC_CSCAN_TAINT(CoNdUtF8,CoNd) \
- PL_reg_flags |= RF_tainted; \
- if (do_utf8) { \
- REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \
- } \
- else { \
- REXEC_FBC_CLASS_SCAN(CoNd); \
- } \
- break
-
-#define DUMP_EXEC_POS(li,s,doutf8) \
- dump_exec_pos(li,s,(PL_regeol),(PL_bostr),(PL_reg_starttry),doutf8)
-
-/* We know what class REx starts with. Try to find this position... */
-/* if reginfo is NULL, its a dryrun */
-/* annoyingly all the vars in this routine have different names from their counterparts
- in regmatch. /grrr */
-
-STATIC char *
-S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s,
- const char *strend, regmatch_info *reginfo)
-{
- dVAR;
- const I32 doevery = (prog->intflags & PREGf_SKIP) == 0;
- char *m;
- STRLEN ln;
- STRLEN lnc;
- register STRLEN uskip;
- unsigned int c1;
- unsigned int c2;
- char *e;
- register I32 tmp = 1; /* Scratch variable? */
- register const bool do_utf8 = PL_reg_match_utf8;
- RXi_GET_DECL(prog,progi);
-
- PERL_ARGS_ASSERT_FIND_BYCLASS;
-
- /* We know what class it must start with. */
- switch (OP(c)) {
- case ANYOF:
- if (do_utf8) {
- REXEC_FBC_UTF8_CLASS_SCAN((ANYOF_FLAGS(c) & ANYOF_UNICODE) ||
- !UTF8_IS_INVARIANT((U8)s[0]) ?
- reginclass(prog, c, (U8*)s, 0, do_utf8) :
- REGINCLASS(prog, c, (U8*)s));
- }
- else {
- while (s < strend) {
- STRLEN skip = 1;
-
- if (REGINCLASS(prog, c, (U8*)s) ||
- (ANYOF_FOLD_SHARP_S(c, s, strend) &&
- /* The assignment of 2 is intentional:
- * for the folded sharp s, the skip is 2. */
- (skip = SHARP_S_SKIP))) {
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- }
- else
- tmp = 1;
- s += skip;
- }
- }
- break;
- case CANY:
- REXEC_FBC_SCAN(
- if (tmp && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- else
- tmp = doevery;
- );
- break;
- case EXACTF:
- m = STRING(c);
- ln = STR_LEN(c); /* length to match in octets/bytes */
- lnc = (I32) ln; /* length to match in characters */
- if (UTF) {
- STRLEN ulen1, ulen2;
- U8 *sm = (U8 *) m;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
- /* used by commented-out code below */
- /*const U32 uniflags = UTF8_ALLOW_DEFAULT;*/
-
- /* XXX: Since the node will be case folded at compile
- time this logic is a little odd, although im not
- sure that its actually wrong. --dmq */
-
- c1 = to_utf8_lower((U8*)m, tmpbuf1, &ulen1);
- c2 = to_utf8_upper((U8*)m, tmpbuf2, &ulen2);
-
- /* XXX: This is kinda strange. to_utf8_XYZ returns the
- codepoint of the first character in the converted
- form, yet originally we did the extra step.
- No tests fail by commenting this code out however
- so Ive left it out. -- dmq.
-
- c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXBYTES_CASE,
- 0, uniflags);
- */
-
- lnc = 0;
- while (sm < ((U8 *) m + ln)) {
- lnc++;
- sm += UTF8SKIP(sm);
- }
- }
- else {
- c1 = *(U8*)m;
- c2 = PL_fold[c1];
- }
- goto do_exactf;
- case EXACTFL:
- m = STRING(c);
- ln = STR_LEN(c);
- lnc = (I32) ln;
- c1 = *(U8*)m;
- c2 = PL_fold_locale[c1];
- do_exactf:
- e = HOP3c(strend, -((I32)lnc), s);
-
- if (!reginfo && e < s)
- e = s; /* Due to minlen logic of intuit() */
-
- /* The idea in the EXACTF* cases is to first find the
- * first character of the EXACTF* node and then, if
- * necessary, case-insensitively compare the full
- * text of the node. The c1 and c2 are the first
- * characters (though in Unicode it gets a bit
- * more complicated because there are more cases
- * than just upper and lower: one needs to use
- * the so-called folding case for case-insensitive
- * matching (called "loose matching" in Unicode).
- * ibcmp_utf8() will do just that. */
-
- if (do_utf8 || UTF) {
- UV c, f;
- U8 tmpbuf [UTF8_MAXBYTES+1];
- STRLEN len = 1;
- STRLEN foldlen;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- if (c1 == c2) {
- /* Upper and lower of 1st char are equal -
- * probably not a "letter". */
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
- REXEC_FBC_EXACTISH_CHECK(c == c1);
- }
- }
- else {
- while (s <= e) {
- if (do_utf8) {
- c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len,
- uniflags);
- } else {
- c = *((U8*)s);
- }
-
- /* Handle some of the three Greek sigmas cases.
- * Note that not all the possible combinations
- * are handled here: some of them are handled
- * by the standard folding rules, and some of
- * them (the character class or ANYOF cases)
- * are handled during compiletime in
- * regexec.c:S_regclass(). */
- if (c == (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA ||
- c == (UV)UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA)
- c = (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA;
-
- REXEC_FBC_EXACTISH_CHECK(c == c1 || c == c2);
- }
- }
- }
- else {
- /* Neither pattern nor string are UTF8 */
- if (c1 == c2)
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1);
- else
- REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1 || *(U8*)s == c2);
- }
- break;
- case BOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == BOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == BOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) {
- tmp = !tmp;
- REXEC_FBC_TRYIT;
- }
- );
- }
- if ((!prog->minlen && tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NBOUND:
- if (do_utf8) {
- if (s == PL_bostr)
- tmp = '\n';
- else {
- U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr);
- tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT);
- }
- tmp = ((OP(c) == NBOUND ?
- isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0);
- LOAD_UTF8_CHARCLASS_ALNUM();
- REXEC_FBC_UTF8_SCAN(
- if (tmp == !(OP(c) == NBOUND ?
- (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) :
- isALNUM_LC_utf8((U8*)s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- else {
- tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n';
- tmp = ((OP(c) == NBOUND ?
- isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
- REXEC_FBC_SCAN(
- if (tmp ==
- !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s)))
- tmp = !tmp;
- else REXEC_FBC_TRYIT;
- );
- }
- if ((!prog->minlen && !tmp) && (!reginfo || regtry(reginfo, &s)))
- goto got_it;
- break;
- case ALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- isALNUM(*s)
- );
- case ALNUML:
- REXEC_FBC_CSCAN_TAINT(
- isALNUM_LC_utf8((U8*)s),
- isALNUM_LC(*s)
- );
- case NALNUM:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_WORD(),
- !swash_fetch(RE_utf8_perl_word, (U8*)s, do_utf8),
- !isALNUM(*s)
- );
- case NALNUML:
- REXEC_FBC_CSCAN_TAINT(
- !isALNUM_LC_utf8((U8*)s),
- !isALNUM_LC(*s)
- );
- case SPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- *s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8),
- isSPACE(*s)
- );
- case SPACEL:
- REXEC_FBC_CSCAN_TAINT(
- *s == ' ' || isSPACE_LC_utf8((U8*)s),
- isSPACE_LC(*s)
- );
- case NSPACE:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_PERL_SPACE(),
- !(*s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, do_utf8)),
- !isSPACE(*s)
- );
- case NSPACEL:
- REXEC_FBC_CSCAN_TAINT(
- !(*s == ' ' || isSPACE_LC_utf8((U8*)s)),
- !isSPACE_LC(*s)
- );
- case DIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- isDIGIT(*s)
- );
- case DIGITL:
- REXEC_FBC_CSCAN_TAINT(
- isDIGIT_LC_utf8((U8*)s),
- isDIGIT_LC(*s)
- );
- case NDIGIT:
- REXEC_FBC_CSCAN_PRELOAD(
- LOAD_UTF8_CHARCLASS_POSIX_DIGIT(),
- !swash_fetch(RE_utf8_posix_digit,(U8*)s, do_utf8),
- !isDIGIT(*s)
- );
- case NDIGITL:
- REXEC_FBC_CSCAN_TAINT(
- !isDIGIT_LC_utf8((U8*)s),
- !isDIGIT_LC(*s)
- );
- case LNBREAK:
- REXEC_FBC_CSCAN(
- is_LNBREAK_utf8(s),
- is_LNBREAK_latin1(s)
- );
- case VERTWS:
- REXEC_FBC_CSCAN(
- is_VERTWS_utf8(s),
- is_VERTWS_latin1(s)
- );
- case NVERTWS:
- REXEC_FBC_CSCAN(
- !is_VERTWS_utf8(s),
- !is_VERTWS_latin1(s)
- );
- case HORIZWS:
- REXEC_FBC_CSCAN(
- is_HORIZWS_utf8(s),
- is_HORIZWS_latin1(s)
- );
- case NHORIZWS:
- REXEC_FBC_CSCAN(
- !is_HORIZWS_utf8(s),
- !is_HORIZWS_latin1(s)
- );
- case AHOCORASICKC:
- case AHOCORASICK:
- {
- DECL_TRIE_TYPE(c);
- /* what trie are we using right now */
- reg_ac_data *aho
- = (reg_ac_data*)progi->data->data[ ARG( c ) ];
- reg_trie_data *trie
- = (reg_trie_data*)progi->data->data[ aho->trie ];
- HV *widecharmap = MUTABLE_HV(progi->data->data[ aho->trie + 1 ]);
-
- const char *last_start = strend - trie->minlen;
-#ifdef DEBUGGING
- const char *real_start = s;
-#endif
- STRLEN maxlen = trie->maxlen;
- SV *sv_points;
- U8 **points; /* map of where we were in the input string
- when reading a given char. For ASCII this
- is unnecessary overhead as the relationship
- is always 1:1, but for Unicode, especially
- case folded Unicode this is not true. */
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
- U8 *bitmap=NULL;
-
-
- GET_RE_DEBUG_FLAGS_DECL;
-
- /* We can't just allocate points here. We need to wrap it in
- * an SV so it gets freed properly if there is a croak while
- * running the match */
- ENTER;
- SAVETMPS;
- sv_points=newSV(maxlen * sizeof(U8 *));
- SvCUR_set(sv_points,
- maxlen * sizeof(U8 *));
- SvPOK_on(sv_points);
- sv_2mortal(sv_points);
- points=(U8**)SvPV_nolen(sv_points );
- if ( trie_type != trie_utf8_fold
- && (trie->bitmap || OP(c)==AHOCORASICKC) )
- {
- if (trie->bitmap)
- bitmap=(U8*)trie->bitmap;
- else
- bitmap=(U8*)ANYOF_BITMAP(c);
- }
- /* this is the Aho-Corasick algorithm modified a touch
- to include special handling for long "unknown char"
- sequences. The basic idea being that we use AC as long
- as we are dealing with a possible matching char, when
- we encounter an unknown char (and we have not encountered
- an accepting state) we scan forward until we find a legal
- starting char.
- AC matching is basically that of trie matching, except
- that when we encounter a failing transition, we fall back
- to the current states "fail state", and try the current char
- again, a process we repeat until we reach the root state,
- state 1, or a legal transition. If we fail on the root state
- then we can either terminate if we have reached an accepting
- state previously, or restart the entire process from the beginning
- if we have not.
-
- */
- while (s <= last_start) {
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- U8 *uc = (U8*)s;
- U16 charid = 0;
- U32 base = 1;
- U32 state = 1;
- UV uvc = 0;
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- U8 *leftmost = NULL;
-#ifdef DEBUGGING
- U32 accepted_word= 0;
-#endif
- U32 pointpos = 0;
-
- while ( state && uc <= (U8*)strend ) {
- int failed=0;
- U32 word = aho->states[ state ].wordnum;
-
- if( state==1 ) {
- if ( bitmap ) {
- DEBUG_TRIE_EXECUTE_r(
- if ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- dump_exec_pos( (char *)uc, c, strend, real_start,
- (char *)uc, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- " Scanning for legal start char...\n");
- }
- );
- while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) {
- uc++;
- }
- s= (char *)uc;
- }
- if (uc >(U8*)last_start) break;
- }
-
- if ( word ) {
- U8 *lpos= points[ (pointpos - trie->wordlen[word-1] ) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=word);
- leftmost= lpos;
- }
- if (base==0) break;
-
- }
- points[pointpos++ % maxlen]= uc;
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
- DEBUG_TRIE_EXECUTE_r({
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf(Perl_debug_log,
- " Charid:%3u CP:%4"UVxf" ",
- charid, uvc);
- });
-
- do {
-#ifdef DEBUGGING
- word = aho->states[ state ].wordnum;
-#endif
- base = aho->states[ state ].trans.base;
-
- DEBUG_TRIE_EXECUTE_r({
- if (failed)
- dump_exec_pos( (char *)uc, c, strend, real_start,
- s, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%sState: %4"UVxf", word=%"UVxf,
- failed ? " Fail transition to " : "",
- (UV)state, (UV)word);
- });
- if ( base ) {
- U32 tmp;
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state
- && (tmp=trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next))
- {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - legal\n"));
- state = tmp;
- break;
- }
- else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - fail\n"));
- failed = 1;
- state = aho->fail[state];
- }
- }
- else {
- /* we must be accepting here */
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log," - accepting\n"));
- failed = 1;
- break;
- }
- } while(state);
- uc += len;
- if (failed) {
- if (leftmost)
- break;
- if (!state) state = 1;
- }
- }
- if ( aho->states[ state ].wordnum ) {
- U8 *lpos = points[ (pointpos - trie->wordlen[aho->states[ state ].wordnum-1]) % maxlen ];
- if (!leftmost || lpos < leftmost) {
- DEBUG_r(accepted_word=aho->states[ state ].wordnum);
- leftmost = lpos;
- }
- }
- if (leftmost) {
- s = (char*)leftmost;
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf(
- Perl_debug_log,"Matches word #%"UVxf" at position %"IVdf". Trying full pattern...\n",
- (UV)accepted_word, (IV)(s - real_start)
- );
- });
- if (!reginfo || regtry(reginfo, &s)) {
- FREETMPS;
- LEAVE;
- goto got_it;
- }
- s = HOPc(s,1);
- DEBUG_TRIE_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,"Pattern failed. Looking for new start point...\n");
- });
- } else {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,"No match.\n"));
- break;
- }
- }
- FREETMPS;
- LEAVE;
- }
- break;
- default:
- Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c));
- break;
- }
- return 0;
- got_it:
- return s;
-}
-
-
-/*
- - regexec_flags - match a regexp against a string
- */
-I32
-Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, register char *strend,
- char *strbeg, I32 minend, SV *sv, void *data, U32 flags)
-/* strend: pointer to null at end of string */
-/* strbeg: real beginning of string */
-/* minend: end of match must be >=minend after stringarg. */
-/* data: May be used for some additional optimizations.
- Currently its only used, with a U32 cast, for transmitting
- the ganch offset when doing a /g match. This will change */
-/* nosave: For optimizations. */
-{
- dVAR;
- struct regexp *const prog = (struct regexp *)SvANY(rx);
- /*register*/ char *s;
- register regnode *c;
- /*register*/ char *startpos = stringarg;
- I32 minlen; /* must match at least this many chars */
- I32 dontbother = 0; /* how many characters not to try at end */
- I32 end_shift = 0; /* Same for the end. */ /* CC */
- I32 scream_pos = -1; /* Internal iterator of scream. */
- char *scream_olds = NULL;
- const bool do_utf8 = (bool)DO_UTF8(sv);
- I32 multiline;
- RXi_GET_DECL(prog,progi);
- regmatch_info reginfo; /* create some info to pass to regtry etc */
- regexp_paren_pair *swap = NULL;
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGEXEC_FLAGS;
- PERL_UNUSED_ARG(data);
-
- /* Be paranoid... */
- if (prog == NULL || startpos == NULL) {
- Perl_croak(aTHX_ "NULL regexp parameter");
- return 0;
- }
-
- multiline = prog->extflags & RXf_PMf_MULTILINE;
- reginfo.prog = rx; /* Yes, sorry that this is confusing. */
-
- RX_MATCH_UTF8_set(rx, do_utf8);
- DEBUG_EXECUTE_r(
- debug_start_match(rx, do_utf8, startpos, strend,
- "Matching");
- );
-
- minlen = prog->minlen;
-
- if (strend - startpos < (minlen+(prog->check_offset_min<0?prog->check_offset_min:0))) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "String too short [regexec_flags]...\n"));
- goto phooey;
- }
-
-
- /* Check validity of program. */
- if (UCHARAT(progi->program) != REG_MAGIC) {
- Perl_croak(aTHX_ "corrupted regexp program");
- }
-
- PL_reg_flags = 0;
- PL_reg_eval_set = 0;
- PL_reg_maxiter = 0;
-
- if (RX_UTF8(rx))
- PL_reg_flags |= RF_utf8;
-
- /* Mark beginning of line for ^ and lookbehind. */
- reginfo.bol = startpos; /* XXX not used ??? */
- PL_bostr = strbeg;
- reginfo.sv = sv;
-
- /* Mark end of line for $ (and such) */
- PL_regeol = strend;
-
- /* see how far we have to get to not match where we matched before */
- reginfo.till = startpos+minend;
-
- /* If there is a "must appear" string, look for it. */
- s = startpos;
-
- if (prog->extflags & RXf_GPOS_SEEN) { /* Need to set reginfo->ganch */
- MAGIC *mg;
- if (flags & REXEC_IGNOREPOS){ /* Means: check only at start */
- reginfo.ganch = startpos + prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS IGNOREPOS: reginfo.ganch = startpos + %"UVxf"\n",(UV)prog->gofs));
- } else if (sv && SvTYPE(sv) >= SVt_PVMG
- && SvMAGIC(sv)
- && (mg = mg_find(sv, PERL_MAGIC_regex_global))
- && mg->mg_len >= 0) {
- reginfo.ganch = strbeg + mg->mg_len; /* Defined pos() */
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS MAGIC: reginfo.ganch = strbeg + %"IVdf"\n",(IV)mg->mg_len));
-
- if (prog->extflags & RXf_ANCH_GPOS) {
- if (s > reginfo.ganch)
- goto phooey;
- s = reginfo.ganch - prog->gofs;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS ANCH_GPOS: s = ganch - %"UVxf"\n",(UV)prog->gofs));
- if (s < strbeg)
- goto phooey;
- }
- }
- else if (data) {
- reginfo.ganch = strbeg + PTR2UV(data);
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS DATA: reginfo.ganch= strbeg + %"UVxf"\n",PTR2UV(data)));
-
- } else { /* pos() not defined */
- reginfo.ganch = strbeg;
- DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log,
- "GPOS: reginfo.ganch = strbeg\n"));
- }
- }
- if (PL_curpm && (PM_GETRE(PL_curpm) == rx)) {
- /* We have to be careful. If the previous successful match
- was from this regex we don't want a subsequent partially
- successful match to clobber the old results.
- So when we detect this possibility we add a swap buffer
- to the re, and switch the buffer each match. If we fail
- we switch it back, otherwise we leave it swapped.
- */
- swap = prog->offs;
- /* do we need a save destructor here for eval dies? */
- Newxz(prog->offs, (prog->nparens + 1), regexp_paren_pair);
- }
- if (!(flags & REXEC_CHECKED) && (prog->check_substr != NULL || prog->check_utf8 != NULL)) {
- re_scream_pos_data d;
-
- d.scream_olds = &scream_olds;
- d.scream_pos = &scream_pos;
- s = re_intuit_start(rx, sv, s, strend, flags, &d);
- if (!s) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not present...\n"));
- goto phooey; /* not present */
- }
- }
-
-
-
- /* Simplest case: anchored match need be tried only once. */
- /* [unless only anchor is BOL and multiline is set] */
- if (prog->extflags & (RXf_ANCH & ~RXf_ANCH_GPOS)) {
- if (s == startpos && regtry(®info, &startpos))
- goto got_it;
- else if (multiline || (prog->intflags & PREGf_IMPLICIT)
- || (prog->extflags & RXf_ANCH_MBOL)) /* XXXX SBOL? */
- {
- char *end;
-
- if (minlen)
- dontbother = minlen - 1;
- end = HOP3c(strend, -dontbother, strbeg) - 1;
- /* for multiline we only have to try after newlines */
- if (prog->check_substr || prog->check_utf8) {
- if (s == startpos)
- goto after_try;
- while (1) {
- if (regtry(®info, &s))
- goto got_it;
- after_try:
- if (s > end)
- goto phooey;
- if (prog->extflags & RXf_USE_INTUIT) {
- s = re_intuit_start(rx, sv, s + 1, strend, flags, NULL);
- if (!s)
- goto phooey;
- }
- else
- s++;
- }
- } else {
- if (s > startpos)
- s--;
- while (s < end) {
- if (*s++ == '\n') { /* don't need PL_utf8skip here */
- if (regtry(®info, &s))
- goto got_it;
- }
- }
- }
- }
- goto phooey;
- } else if (RXf_GPOS_CHECK == (prog->extflags & RXf_GPOS_CHECK))
- {
- /* the warning about reginfo.ganch being used without intialization
- is bogus -- we set it above, when prog->extflags & RXf_GPOS_SEEN
- and we only enter this block when the same bit is set. */
- char *tmp_s = reginfo.ganch - prog->gofs;
-
- if (tmp_s >= strbeg && regtry(®info, &tmp_s))
- goto got_it;
- goto phooey;
- }
-
- /* Messy cases: unanchored match. */
- if ((prog->anchored_substr || prog->anchored_utf8) && prog->intflags & PREGf_SKIP) {
- /* we have /x+whatever/ */
- /* it must be a one character string (XXXX Except UTF?) */
- char ch;
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- ch = SvPVX_const(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)[0];
-
- if (do_utf8) {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s += UTF8SKIP(s);
- while (s < strend && *s == ch)
- s += UTF8SKIP(s);
- }
- );
- }
- else {
- REXEC_FBC_SCAN(
- if (*s == ch) {
- DEBUG_EXECUTE_r( did_match = 1 );
- if (regtry(®info, &s)) goto got_it;
- s++;
- while (s < strend && *s == ch)
- s++;
- }
- );
- }
- DEBUG_EXECUTE_r(if (!did_match)
- PerlIO_printf(Perl_debug_log,
- "Did not find anchored character...\n")
- );
- }
- else if (prog->anchored_substr != NULL
- || prog->anchored_utf8 != NULL
- || ((prog->float_substr != NULL || prog->float_utf8 != NULL)
- && prog->float_max_offset < strend - s)) {
- SV *must;
- I32 back_max;
- I32 back_min;
- char *last;
- char *last1; /* Last position checked before */
-#ifdef DEBUGGING
- int did_match = 0;
-#endif
- if (prog->anchored_substr || prog->anchored_utf8) {
- if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr;
- back_max = back_min = prog->anchored_offset;
- } else {
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- must = do_utf8 ? prog->float_utf8 : prog->float_substr;
- back_max = prog->float_max_offset;
- back_min = prog->float_min_offset;
- }
-
-
- if (must == &PL_sv_undef)
- /* could not downgrade utf8 check substring, so must fail */
- goto phooey;
-
- if (back_min<0) {
- last = strend;
- } else {
- last = HOP3c(strend, /* Cannot start after this */
- -(I32)(CHR_SVLEN(must)
- - (SvTAIL(must) != 0) + back_min), strbeg);
- }
- if (s > PL_bostr)
- last1 = HOPc(s, -1);
- else
- last1 = s - 1; /* bogus */
-
- /* XXXX check_substr already used to find "s", can optimize if
- check_substr==must. */
- scream_pos = -1;
- dontbother = end_shift;
- strend = HOPc(strend, -dontbother);
- while ( (s <= last) &&
- ((flags & REXEC_SCREAM)
- ? (s = screaminstr(sv, must, HOP3c(s, back_min, (back_min<0 ? strbeg : strend)) - strbeg,
- end_shift, &scream_pos, 0))
- : (s = fbm_instr((unsigned char*)HOP3(s, back_min, (back_min<0 ? strbeg : strend)),
- (unsigned char*)strend, must,
- multiline ? FBMrf_MULTILINE : 0))) ) {
- /* we may be pointing at the wrong string */
- if ((flags & REXEC_SCREAM) && RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- DEBUG_EXECUTE_r( did_match = 1 );
- if (HOPc(s, -back_max) > last1) {
- last1 = HOPc(s, -back_min);
- s = HOPc(s, -back_max);
- }
- else {
- char * const t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1;
-
- last1 = HOPc(s, -back_min);
- s = t;
- }
- if (do_utf8) {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s += UTF8SKIP(s);
- }
- }
- else {
- while (s <= last1) {
- if (regtry(®info, &s))
- goto got_it;
- s++;
- }
- }
- }
- DEBUG_EXECUTE_r(if (!did_match) {
- RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0),
- SvPVX_const(must), RE_SV_DUMPLEN(must), 30);
- PerlIO_printf(Perl_debug_log, "Did not find %s substr %s%s...\n",
- ((must == prog->anchored_substr || must == prog->anchored_utf8)
- ? "anchored" : "floating"),
- quoted, RE_SV_TAIL(must));
- });
- goto phooey;
- }
- else if ( (c = progi->regstclass) ) {
- if (minlen) {
- const OPCODE op = OP(progi->regstclass);
- /* don't bother with what can't match */
- if (PL_regkind[op] != EXACT && op != CANY && PL_regkind[op] != TRIE)
- strend = HOPc(strend, -(minlen - 1));
- }
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, c);
- {
- RE_PV_QUOTED_DECL(quoted,do_utf8,PERL_DEBUG_PAD_ZERO(1),
- s,strend-s,60);
- PerlIO_printf(Perl_debug_log,
- "Matching stclass %.*s against %s (%d chars)\n",
- (int)SvCUR(prop), SvPVX_const(prop),
- quoted, (int)(strend - s));
- }
- });
- if (find_byclass(prog, c, s, strend, ®info))
- goto got_it;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass... [regexec_flags]\n"));
- }
- else {
- dontbother = 0;
- if (prog->float_substr != NULL || prog->float_utf8 != NULL) {
- /* Trim the end. */
- char *last;
- SV* float_real;
-
- if (!(do_utf8 ? prog->float_utf8 : prog->float_substr))
- do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog);
- float_real = do_utf8 ? prog->float_utf8 : prog->float_substr;
-
- if (flags & REXEC_SCREAM) {
- last = screaminstr(sv, float_real, s - strbeg,
- end_shift, &scream_pos, 1); /* last one */
- if (!last)
- last = scream_olds; /* Only one occurrence. */
- /* we may be pointing at the wrong string */
- else if (RXp_MATCH_COPIED(prog))
- s = strbeg + (s - SvPVX_const(sv));
- }
- else {
- STRLEN len;
- const char * const little = SvPV_const(float_real, len);
-
- if (SvTAIL(float_real)) {
- if (memEQ(strend - len + 1, little, len - 1))
- last = strend - len + 1;
- else if (!multiline)
- last = memEQ(strend - len, little, len)
- ? strend - len : NULL;
- else
- goto find_last;
- } else {
- find_last:
- if (len)
- last = rninstr(s, strend, little, little + len);
- else
- last = strend; /* matching "$" */
- }
- }
- if (last == NULL) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%sCan't trim the tail, match fails (should not happen)%s\n",
- PL_colors[4], PL_colors[5]));
- goto phooey; /* Should not happen! */
- }
- dontbother = strend - last + prog->float_min_offset;
- }
- if (minlen && (dontbother < minlen))
- dontbother = minlen - 1;
- strend -= dontbother; /* this one's always in bytes! */
- /* We don't know much -- general case. */
- if (do_utf8) {
- for (;;) {
- if (regtry(®info, &s))
- goto got_it;
- if (s >= strend)
- break;
- s += UTF8SKIP(s);
- };
- }
- else {
- do {
- if (regtry(®info, &s))
- goto got_it;
- } while (s++ < strend);
- }
- }
-
- /* Failure. */
- goto phooey;
-
-got_it:
- Safefree(swap);
- RX_MATCH_TAINTED_set(rx, PL_reg_flags & RF_tainted);
-
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (RXp_PAREN_NAMES(prog))
- (void)hv_iterinit(RXp_PAREN_NAMES(prog));
-
- /* make sure $`, $&, $', and $digit will work later */
- if ( !(flags & REXEC_NOT_FIRST) ) {
- RX_MATCH_COPY_FREE(rx);
- if (flags & REXEC_COPY_STR) {
- const I32 i = PL_regeol - startpos + (stringarg - strbeg);
-#ifdef PERL_OLD_COPY_ON_WRITE
- if ((SvIsCOW(sv)
- || (SvFLAGS(sv) & CAN_COW_MASK) == CAN_COW_FLAGS)) {
- if (DEBUG_C_TEST) {
- PerlIO_printf(Perl_debug_log,
- "Copy on write: regexp capture, type %d\n",
- (int) SvTYPE(sv));
- }
- prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv);
- prog->subbeg = (char *)SvPVX_const(prog->saved_copy);
- assert (SvPOKp(prog->saved_copy));
- } else
-#endif
- {
- RX_MATCH_COPIED_on(rx);
- s = savepvn(strbeg, i);
- prog->subbeg = s;
- }
- prog->sublen = i;
- }
- else {
- prog->subbeg = strbeg;
- prog->sublen = PL_regeol - strbeg; /* strend may have been modified */
- }
- }
-
- return 1;
-
-phooey:
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n",
- PL_colors[4], PL_colors[5]));
- if (PL_reg_eval_set)
- restore_pos(aTHX_ prog);
- if (swap) {
- /* we failed :-( roll it back */
- Safefree(prog->offs);
- prog->offs = swap;
- }
-
- return 0;
-}
-
-
-/*
- - regtry - try match at specific point
- */
-STATIC I32 /* 0 failure, 1 success */
-S_regtry(pTHX_ regmatch_info *reginfo, char **startpos)
-{
- dVAR;
- CHECKPOINT lastcp;
- REGEXP *const rx = reginfo->prog;
- regexp *const prog = (struct regexp *)SvANY(rx);
- RXi_GET_DECL(prog,progi);
- GET_RE_DEBUG_FLAGS_DECL;
-
- PERL_ARGS_ASSERT_REGTRY;
-
- reginfo->cutpoint=NULL;
-
- if ((prog->extflags & RXf_EVAL_SEEN) && !PL_reg_eval_set) {
- MAGIC *mg;
-
- PL_reg_eval_set = RS_init;
- DEBUG_EXECUTE_r(DEBUG_s(
- PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n",
- (IV)(PL_stack_sp - PL_stack_base));
- ));
- SAVESTACK_CXPOS();
- cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base;
- /* Otherwise OP_NEXTSTATE will free whatever on stack now. */
- SAVETMPS;
- /* Apparently this is not needed, judging by wantarray. */
- /* SAVEI8(cxstack[cxstack_ix].blk_gimme);
- cxstack[cxstack_ix].blk_gimme = G_SCALAR; */
-
- if (reginfo->sv) {
- /* Make $_ available to executed code. */
- if (reginfo->sv != DEFSV) {
- SAVE_DEFSV;
- DEFSV_set(reginfo->sv);
- }
-
- if (!(SvTYPE(reginfo->sv) >= SVt_PVMG && SvMAGIC(reginfo->sv)
- && (mg = mg_find(reginfo->sv, PERL_MAGIC_regex_global)))) {
- /* prepare for quick setting of pos */
-#ifdef PERL_OLD_COPY_ON_WRITE
- if (SvIsCOW(reginfo->sv))
- sv_force_normal_flags(reginfo->sv, 0);
-#endif
- mg = sv_magicext(reginfo->sv, NULL, PERL_MAGIC_regex_global,
- &PL_vtbl_mglob, NULL, 0);
- mg->mg_len = -1;
- }
- PL_reg_magic = mg;
- PL_reg_oldpos = mg->mg_len;
- SAVEDESTRUCTOR_X(restore_pos, prog);
- }
- if (!PL_reg_curpm) {
- Newxz(PL_reg_curpm, 1, PMOP);
-#ifdef USE_ITHREADS
- {
- SV* const repointer = &PL_sv_undef;
- /* this regexp is also owned by the new PL_reg_curpm, which
- will try to free it. */
- av_push(PL_regex_padav, repointer);
- PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav);
- PL_regex_pad = AvARRAY(PL_regex_padav);
- }
-#endif
- }
-#ifdef USE_ITHREADS
- /* It seems that non-ithreads works both with and without this code.
- So for efficiency reasons it seems best not to have the code
- compiled when it is not needed. */
- /* This is safe against NULLs: */
- ReREFCNT_dec(PM_GETRE(PL_reg_curpm));
- /* PM_reg_curpm owns a reference to this regexp. */
- ReREFCNT_inc(rx);
-#endif
- PM_SETRE(PL_reg_curpm, rx);
- PL_reg_oldcurpm = PL_curpm;
- PL_curpm = PL_reg_curpm;
- if (RXp_MATCH_COPIED(prog)) {
- /* Here is a serious problem: we cannot rewrite subbeg,
- since it may be needed if this match fails. Thus
- $` inside (?{}) could fail... */
- PL_reg_oldsaved = prog->subbeg;
- PL_reg_oldsavedlen = prog->sublen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- PL_nrs = prog->saved_copy;
-#endif
- RXp_MATCH_COPIED_off(prog);
- }
- else
- PL_reg_oldsaved = NULL;
- prog->subbeg = PL_bostr;
- prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */
- }
- DEBUG_EXECUTE_r(PL_reg_starttry = *startpos);
- prog->offs[0].start = *startpos - PL_bostr;
- PL_reginput = *startpos;
- PL_reglastparen = &prog->lastparen;
- PL_reglastcloseparen = &prog->lastcloseparen;
- prog->lastparen = 0;
- prog->lastcloseparen = 0;
- PL_regsize = 0;
- PL_regoffs = prog->offs;
- if (PL_reg_start_tmpl <= prog->nparens) {
- PL_reg_start_tmpl = prog->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- /* XXXX What this code is doing here?!!! There should be no need
- to do this again and again, PL_reglastparen should take care of
- this! --ilya*/
-
- /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code.
- * Actually, the code in regcppop() (which Ilya may be meaning by
- * PL_reglastparen), is not needed at all by the test suite
- * (op/regexp, op/pat, op/split), but that code is needed otherwise
- * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/
- * Meanwhile, this code *is* needed for the
- * above-mentioned test suite tests to succeed. The common theme
- * on those tests seems to be returning null fields from matches.
- * --jhi updated by dapm */
-#if 1
- if (prog->nparens) {
- regexp_paren_pair *pp = PL_regoffs;
- register I32 i;
- for (i = prog->nparens; i > (I32)*PL_reglastparen; i--) {
- ++pp;
- pp->start = -1;
- pp->end = -1;
- }
- }
-#endif
- REGCP_SET(lastcp);
- if (regmatch(reginfo, progi->program + 1)) {
- PL_regoffs[0].end = PL_reginput - PL_bostr;
- return 1;
- }
- if (reginfo->cutpoint)
- *startpos= reginfo->cutpoint;
- REGCP_UNWIND(lastcp);
- return 0;
-}
-
-
-#define sayYES goto yes
-#define sayNO goto no
-#define sayNO_SILENT goto no_silent
-
-/* we dont use STMT_START/END here because it leads to
- "unreachable code" warnings, which are bogus, but distracting. */
-#define CACHEsayNO \
- if (ST.cache_mask) \
- PL_reg_poscache[ST.cache_offset] |= ST.cache_mask; \
- sayNO
-
-/* this is used to determine how far from the left messages like
- 'failed...' are printed. It should be set such that messages
- are inline with the regop output that created them.
-*/
-#define REPORT_CODE_OFF 32
-
-
-/* Make sure there is a test for this +1 options in re_tests */
-#define TRIE_INITAL_ACCEPT_BUFFLEN 4;
-
-#define CHRTEST_UNINIT -1001 /* c1/c2 haven't been calculated yet */
-#define CHRTEST_VOID -1000 /* the c1/c2 "next char" test should be skipped */
-
-#define SLAB_FIRST(s) (&(s)->states[0])
-#define SLAB_LAST(s) (&(s)->states[PERL_REGMATCH_SLAB_SLOTS-1])
-
-/* grab a new slab and return the first slot in it */
-
-STATIC regmatch_state *
-S_push_slab(pTHX)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- regmatch_slab *s = PL_regmatch_slab->next;
- if (!s) {
- Newx(s, 1, regmatch_slab);
- s->prev = PL_regmatch_slab;
- s->next = NULL;
- PL_regmatch_slab->next = s;
- }
- PL_regmatch_slab = s;
- return SLAB_FIRST(s);
-}
-
-
-/* push a new state then goto it */
-
-#define PUSH_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_state;
-
-/* push a new state with success backtracking, then goto it */
-
-#define PUSH_YES_STATE_GOTO(state, node) \
- scan = node; \
- st->resume_state = state; \
- goto push_yes_state;
-
-
-
-/*
-
-regmatch() - main matching routine
-
-This is basically one big switch statement in a loop. We execute an op,
-set 'next' to point the next op, and continue. If we come to a point which
-we may need to backtrack to on failure such as (A|B|C), we push a
-backtrack state onto the backtrack stack. On failure, we pop the top
-state, and re-enter the loop at the state indicated. If there are no more
-states to pop, we return failure.
-
-Sometimes we also need to backtrack on success; for example /A+/, where
-after successfully matching one A, we need to go back and try to
-match another one; similarly for lookahead assertions: if the assertion
-completes successfully, we backtrack to the state just before the assertion
-and then carry on. In these cases, the pushed state is marked as
-'backtrack on success too'. This marking is in fact done by a chain of
-pointers, each pointing to the previous 'yes' state. On success, we pop to
-the nearest yes state, discarding any intermediate failure-only states.
-Sometimes a yes state is pushed just to force some cleanup code to be
-called at the end of a successful match or submatch; e.g. (??{$re}) uses
-it to free the inner regex.
-
-Note that failure backtracking rewinds the cursor position, while
-success backtracking leaves it alone.
-
-A pattern is complete when the END op is executed, while a subpattern
-such as (?=foo) is complete when the SUCCESS op is executed. Both of these
-ops trigger the "pop to last yes state if any, otherwise return true"
-behaviour.
-
-A common convention in this function is to use A and B to refer to the two
-subpatterns (or to the first nodes thereof) in patterns like /A*B/: so A is
-the subpattern to be matched possibly multiple times, while B is the entire
-rest of the pattern. Variable and state names reflect this convention.
-
-The states in the main switch are the union of ops and failure/success of
-substates associated with with that op. For example, IFMATCH is the op
-that does lookahead assertions /(?=A)B/ and so the IFMATCH state means
-'execute IFMATCH'; while IFMATCH_A is a state saying that we have just
-successfully matched A and IFMATCH_A_fail is a state saying that we have
-just failed to match A. Resume states always come in pairs. The backtrack
-state we push is marked as 'IFMATCH_A', but when that is popped, we resume
-at IFMATCH_A or IFMATCH_A_fail, depending on whether we are backtracking
-on success or failure.
-
-The struct that holds a backtracking state is actually a big union, with
-one variant for each major type of op. The variable st points to the
-top-most backtrack struct. To make the code clearer, within each
-block of code we #define ST to alias the relevant union.
-
-Here's a concrete example of a (vastly oversimplified) IFMATCH
-implementation:
-
- switch (state) {
- ....
-
-#define ST st->u.ifmatch
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- ST.foo = ...; // some state we wish to save
- ...
- // push a yes backtrack state with a resume value of
- // IFMATCH_A/IFMATCH_A_fail, then continue execution at the
- // first node of A:
- PUSH_YES_STATE_GOTO(IFMATCH_A, A);
- // NOTREACHED
-
- case IFMATCH_A: // we have successfully executed A; now continue with B
- next = B;
- bar = ST.foo; // do something with the preserved value
- break;
-
- case IFMATCH_A_fail: // A failed, so the assertion failed
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
-
-#undef ST
-
- ...
- }
-
-For any old-timers reading this who are familiar with the old recursive
-approach, the code above is equivalent to:
-
- case IFMATCH: // we are executing the IFMATCH op, (?=A)B
- {
- int foo = ...
- ...
- if (regmatch(A)) {
- next = B;
- bar = foo;
- break;
- }
- ...; // do some housekeeping, then ...
- sayNO; // propagate the failure
- }
-
-The topmost backtrack state, pointed to by st, is usually free. If you
-want to claim it, populate any ST.foo fields in it with values you wish to
-save, then do one of
-
- PUSH_STATE_GOTO(resume_state, node);
- PUSH_YES_STATE_GOTO(resume_state, node);
-
-which sets that backtrack state's resume value to 'resume_state', pushes a
-new free entry to the top of the backtrack stack, then goes to 'node'.
-On backtracking, the free slot is popped, and the saved state becomes the
-new free state. An ST.foo field in this new top state can be temporarily
-accessed to retrieve values, but once the main loop is re-entered, it
-becomes available for reuse.
-
-Note that the depth of the backtrack stack constantly increases during the
-left-to-right execution of the pattern, rather than going up and down with
-the pattern nesting. For example the stack is at its maximum at Z at the
-end of the pattern, rather than at X in the following:
-
- /(((X)+)+)+....(Y)+....Z/
-
-The only exceptions to this are lookahead/behind assertions and the cut,
-(?>A), which pop all the backtrack states associated with A before
-continuing.
-
-Bascktrack state structs are allocated in slabs of about 4K in size.
-PL_regmatch_state and st always point to the currently active state,
-and PL_regmatch_slab points to the slab currently containing
-PL_regmatch_state. The first time regmatch() is called, the first slab is
-allocated, and is never freed until interpreter destruction. When the slab
-is full, a new one is allocated and chained to the end. At exit from
-regmatch(), slabs allocated since entry are freed.
-
-*/
-
-
-#define DEBUG_STATE_pp(pp) \
- DEBUG_STATE_r({ \
- DUMP_EXEC_POS(locinput, scan, do_utf8); \
- PerlIO_printf(Perl_debug_log, \
- " %*s"pp" %s%s%s%s%s\n", \
- depth*2, "", \
- PL_reg_name[st->resume_state], \
- ((st==yes_state||st==mark_state) ? "[" : ""), \
- ((st==yes_state) ? "Y" : ""), \
- ((st==mark_state) ? "M" : ""), \
- ((st==yes_state||st==mark_state) ? "]" : "") \
- ); \
- });
-
-
-#define REG_NODE_NUM(x) ((x) ? (int)((x)-prog) : -1)
-
-#ifdef DEBUGGING
-
-STATIC void
-S_debug_start_match(pTHX_ const REGEXP *prog, const bool do_utf8,
- const char *start, const char *end, const char *blurb)
-{
- const bool utf8_pat = RX_UTF8(prog) ? 1 : 0;
-
- PERL_ARGS_ASSERT_DEBUG_START_MATCH;
-
- if (!PL_colorset)
- reginitcolors();
- {
- RE_PV_QUOTED_DECL(s0, utf8_pat, PERL_DEBUG_PAD_ZERO(0),
- RX_PRECOMP_const(prog), RX_PRELEN(prog), 60);
-
- RE_PV_QUOTED_DECL(s1, do_utf8, PERL_DEBUG_PAD_ZERO(1),
- start, end - start, 60);
-
- PerlIO_printf(Perl_debug_log,
- "%s%s REx%s %s against %s\n",
- PL_colors[4], blurb, PL_colors[5], s0, s1);
-
- if (do_utf8||utf8_pat)
- PerlIO_printf(Perl_debug_log, "UTF-8 %s%s%s...\n",
- utf8_pat ? "pattern" : "",
- utf8_pat && do_utf8 ? " and " : "",
- do_utf8 ? "string" : ""
- );
- }
-}
-
-STATIC void
-S_dump_exec_pos(pTHX_ const char *locinput,
- const regnode *scan,
- const char *loc_regeol,
- const char *loc_bostr,
- const char *loc_reg_starttry,
- const bool do_utf8)
-{
- const int docolor = *PL_colors[0] || *PL_colors[2] || *PL_colors[4];
- const int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */
- int l = (loc_regeol - locinput) > taill ? taill : (loc_regeol - locinput);
- /* The part of the string before starttry has one color
- (pref0_len chars), between starttry and current
- position another one (pref_len - pref0_len chars),
- after the current position the third one.
- We assume that pref0_len <= pref_len, otherwise we
- decrease pref0_len. */
- int pref_len = (locinput - loc_bostr) > (5 + taill) - l
- ? (5 + taill) - l : locinput - loc_bostr;
- int pref0_len;
-
- PERL_ARGS_ASSERT_DUMP_EXEC_POS;
-
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len)))
- pref_len++;
- pref0_len = pref_len - (locinput - loc_reg_starttry);
- if (l + pref_len < (5 + taill) && l < loc_regeol - locinput)
- l = ( loc_regeol - locinput > (5 + taill) - pref_len
- ? (5 + taill) - pref_len : loc_regeol - locinput);
- while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput + l)))
- l--;
- if (pref0_len < 0)
- pref0_len = 0;
- if (pref0_len > pref_len)
- pref0_len = pref_len;
- {
- const int is_uni = (do_utf8 && OP(scan) != CANY) ? 1 : 0;
-
- RE_PV_COLOR_DECL(s0,len0,is_uni,PERL_DEBUG_PAD(0),
- (locinput - pref_len),pref0_len, 60, 4, 5);
-
- RE_PV_COLOR_DECL(s1,len1,is_uni,PERL_DEBUG_PAD(1),
- (locinput - pref_len + pref0_len),
- pref_len - pref0_len, 60, 2, 3);
-
- RE_PV_COLOR_DECL(s2,len2,is_uni,PERL_DEBUG_PAD(2),
- locinput, loc_regeol - locinput, 10, 0, 1);
-
- const STRLEN tlen=len0+len1+len2;
- PerlIO_printf(Perl_debug_log,
- "%4"IVdf" <%.*s%.*s%s%.*s>%*s|",
- (IV)(locinput - loc_bostr),
- len0, s0,
- len1, s1,
- (docolor ? "" : "> <"),
- len2, s2,
- (int)(tlen > 19 ? 0 : 19 - tlen),
- "");
- }
-}
-
-#endif
-
-/* reg_check_named_buff_matched()
- * Checks to see if a named buffer has matched. The data array of
- * buffer numbers corresponding to the buffer is expected to reside
- * in the regexp->data->data array in the slot stored in the ARG() of
- * node involved. Note that this routine doesn't actually care about the
- * name, that information is not preserved from compilation to execution.
- * Returns the index of the leftmost defined buffer with the given name
- * or 0 if non of the buffers matched.
- */
-STATIC I32
-S_reg_check_named_buff_matched(pTHX_ const regexp *rex, const regnode *scan)
-{
- I32 n;
- RXi_GET_DECL(rex,rexi);
- SV *sv_dat= MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- I32 *nums=(I32*)SvPVX(sv_dat);
-
- PERL_ARGS_ASSERT_REG_CHECK_NAMED_BUFF_MATCHED;
-
- for ( n=0; n<SvIVX(sv_dat); n++ ) {
- if ((I32)*PL_reglastparen >= nums[n] &&
- PL_regoffs[nums[n]].end != -1)
- {
- return nums[n];
- }
- }
- return 0;
-}
-
-
-/* free all slabs above current one - called during LEAVE_SCOPE */
-
-STATIC void
-S_clear_backtrack_stack(pTHX_ void *p)
-{
- regmatch_slab *s = PL_regmatch_slab->next;
- PERL_UNUSED_ARG(p);
-
- if (!s)
- return;
- PL_regmatch_slab->next = NULL;
- while (s) {
- regmatch_slab * const osl = s;
- s = s->next;
- Safefree(osl);
- }
-}
-
-
-#define SETREX(Re1,Re2) \
- if (PL_reg_eval_set) PM_SETRE((PL_reg_curpm), (Re2)); \
- Re1 = (Re2)
-
-STATIC I32 /* 0 failure, 1 success */
-S_regmatch(pTHX_ regmatch_info *reginfo, regnode *prog)
-{
-#if PERL_VERSION < 9 && !defined(PERL_CORE)
- dMY_CXT;
-#endif
- dVAR;
- register const bool do_utf8 = PL_reg_match_utf8;
- const U32 uniflags = UTF8_ALLOW_DEFAULT;
- REGEXP *rex_sv = reginfo->prog;
- regexp *rex = (struct regexp *)SvANY(rex_sv);
- RXi_GET_DECL(rex,rexi);
- I32 oldsave;
- /* the current state. This is a cached copy of PL_regmatch_state */
- register regmatch_state *st;
- /* cache heavy used fields of st in registers */
- register regnode *scan;
- register regnode *next;
- register U32 n = 0; /* general value; init to avoid compiler warning */
- register I32 ln = 0; /* len or last; init to avoid compiler warning */
- register char *locinput = PL_reginput;
- register I32 nextchr; /* is always set to UCHARAT(locinput) */
-
- bool result = 0; /* return value of S_regmatch */
- int depth = 0; /* depth of backtrack stack */
- U32 nochange_depth = 0; /* depth of GOSUB recursion with nochange */
- const U32 max_nochange_depth =
- (3 * rex->nparens > MAX_RECURSE_EVAL_NOCHANGE_DEPTH) ?
- 3 * rex->nparens : MAX_RECURSE_EVAL_NOCHANGE_DEPTH;
- regmatch_state *yes_state = NULL; /* state to pop to on success of
- subpattern */
- /* mark_state piggy backs on the yes_state logic so that when we unwind
- the stack on success we can update the mark_state as we go */
- regmatch_state *mark_state = NULL; /* last mark state we have seen */
- regmatch_state *cur_eval = NULL; /* most recent EVAL_AB state */
- struct regmatch_state *cur_curlyx = NULL; /* most recent curlyx */
- U32 state_num;
- bool no_final = 0; /* prevent failure from backtracking? */
- bool do_cutgroup = 0; /* no_final only until next branch/trie entry */
- char *startpoint = PL_reginput;
- SV *popmark = NULL; /* are we looking for a mark? */
- SV *sv_commit = NULL; /* last mark name seen in failure */
- SV *sv_yes_mark = NULL; /* last mark name we have seen
- during a successfull match */
- U32 lastopen = 0; /* last open we saw */
- bool has_cutgroup = RX_HAS_CUTGROUP(rex) ? 1 : 0;
- SV* const oreplsv = GvSV(PL_replgv);
- /* these three flags are set by various ops to signal information to
- * the very next op. They have a useful lifetime of exactly one loop
- * iteration, and are not preserved or restored by state pushes/pops
- */
- bool sw = 0; /* the condition value in (?(cond)a|b) */
- bool minmod = 0; /* the next "{n,m}" is a "{n,m}?" */
- int logical = 0; /* the following EVAL is:
- 0: (?{...})
- 1: (?(?{...})X|Y)
- 2: (??{...})
- or the following IFMATCH/UNLESSM is:
- false: plain (?=foo)
- true: used as a condition: (?(?=foo))
- */
-#ifdef DEBUGGING
- GET_RE_DEBUG_FLAGS_DECL;
-#endif
-
- PERL_ARGS_ASSERT_REGMATCH;
-
- DEBUG_OPTIMISE_r( DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,"regmatch start\n");
- }));
- /* on first ever call to regmatch, allocate first slab */
- if (!PL_regmatch_slab) {
- Newx(PL_regmatch_slab, 1, regmatch_slab);
- PL_regmatch_slab->prev = NULL;
- PL_regmatch_slab->next = NULL;
- PL_regmatch_state = SLAB_FIRST(PL_regmatch_slab);
- }
-
- oldsave = PL_savestack_ix;
- SAVEDESTRUCTOR_X(S_clear_backtrack_stack, NULL);
- SAVEVPTR(PL_regmatch_slab);
- SAVEVPTR(PL_regmatch_state);
-
- /* grab next free state slot */
- st = ++PL_regmatch_state;
- if (st > SLAB_LAST(PL_regmatch_slab))
- st = PL_regmatch_state = S_push_slab(aTHX);
-
- /* Note that nextchr is a byte even in UTF */
- nextchr = UCHARAT(locinput);
- scan = prog;
- while (scan != NULL) {
-
- DEBUG_EXECUTE_r( {
- SV * const prop = sv_newmortal();
- regnode *rnext=regnext(scan);
- DUMP_EXEC_POS( locinput, scan, do_utf8 );
- regprop(rex, prop, scan);
-
- PerlIO_printf(Perl_debug_log,
- "%3"IVdf":%*s%s(%"IVdf")\n",
- (IV)(scan - rexi->program), depth*2, "",
- SvPVX_const(prop),
- (PL_regkind[OP(scan)] == END || !rnext) ?
- 0 : (IV)(rnext - rexi->program));
- });
-
- next = scan + NEXT_OFF(scan);
- if (next == scan)
- next = NULL;
- state_num = OP(scan);
-
- REH_CALL_EXEC_NODE_HOOK(rex, scan, reginfo, st);
- reenter_switch:
-
- assert(PL_reglastparen == &rex->lastparen);
- assert(PL_reglastcloseparen == &rex->lastcloseparen);
- assert(PL_regoffs == rex->offs);
-
- switch (state_num) {
- case BOL:
- if (locinput == PL_bostr)
- {
- /* reginfo->till = reginfo->bol; */
- break;
- }
- sayNO;
- case MBOL:
- if (locinput == PL_bostr ||
- ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n'))
- {
- break;
- }
- sayNO;
- case SBOL:
- if (locinput == PL_bostr)
- break;
- sayNO;
- case GPOS:
- if (locinput == reginfo->ganch)
- break;
- sayNO;
-
- case KEEPS:
- /* update the startpoint */
- st->u.keeper.val = PL_regoffs[0].start;
- PL_reginput = locinput;
- PL_regoffs[0].start = locinput - PL_bostr;
- PUSH_STATE_GOTO(KEEPS_next, next);
- /*NOT-REACHED*/
- case KEEPS_next_fail:
- /* rollback the start point change */
- PL_regoffs[0].start = st->u.keeper.val;
- sayNO_SILENT;
- /*NOT-REACHED*/
- case EOL:
- goto seol;
- case MEOL:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- break;
- case SEOL:
- seol:
- if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
- sayNO;
- if (PL_regeol - locinput > 1)
- sayNO;
- break;
- case EOS:
- if (PL_regeol != locinput)
- sayNO;
- break;
- case SANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
- case CANY:
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- case REG_ANY:
- if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n')
- sayNO;
- if (do_utf8) {
- locinput += PL_utf8skip[nextchr];
- if (locinput > PL_regeol)
- sayNO;
- nextchr = UCHARAT(locinput);
- }
- else
- nextchr = UCHARAT(++locinput);
- break;
-
-#undef ST
-#define ST st->u.trie
- case TRIEC:
- /* In this case the charclass data is available inline so
- we can fail fast without a lot of extra overhead.
- */
- if (scan->flags == EXACT || !do_utf8) {
- if(!ANYOF_BITMAP_TEST(scan, *locinput)) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case TRIE:
- {
- /* what type of TRIE am I? (utf8 makes this contextual) */
- DECL_TRIE_TYPE(scan);
-
- /* what trie are we using right now */
- reg_trie_data * const trie
- = (reg_trie_data*)rexi->data->data[ ARG( scan ) ];
- HV * widecharmap = MUTABLE_HV(rexi->data->data[ ARG( scan ) + 1 ]);
- U32 state = trie->startstate;
-
- if (trie->bitmap && trie_type != trie_utf8_fold &&
- !TRIE_BITMAP_TEST(trie,*locinput)
- ) {
- if (trie->states[ state ].wordnum) {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %smatched empty string...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- break;
- } else {
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed to match trie start class...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])
- );
- sayNO_SILENT;
- }
- }
-
- {
- U8 *uc = ( U8* )locinput;
-
- STRLEN len = 0;
- STRLEN foldlen = 0;
- U8 *uscan = (U8*)NULL;
- STRLEN bufflen=0;
- SV *sv_accept_buff = NULL;
- U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ];
-
- ST.accepted = 0; /* how many accepting states we have seen */
- ST.B = next;
- ST.jump = trie->jump;
- ST.me = scan;
- /*
- traverse the TRIE keeping track of all accepting states
- we transition through until we get to a failing node.
- */
-
- while ( state && uc <= (U8*)PL_regeol ) {
- U32 base = trie->states[ state ].trans.base;
- UV uvc = 0;
- U16 charid;
- /* We use charid to hold the wordnum as we don't use it
- for charid until after we have done the wordnum logic.
- We define an alias just so that the wordnum logic reads
- more naturally. */
-
-#define got_wordnum charid
- got_wordnum = trie->states[ state ].wordnum;
-
- if ( got_wordnum ) {
- if ( ! ST.accepted ) {
- ENTER;
- SAVETMPS; /* XXX is this necessary? dmq */
- bufflen = TRIE_INITAL_ACCEPT_BUFFLEN;
- sv_accept_buff=newSV(bufflen *
- sizeof(reg_trie_accepted) - 1);
- SvCUR_set(sv_accept_buff, 0);
- SvPOK_on(sv_accept_buff);
- sv_2mortal(sv_accept_buff);
- SAVETMPS;
- ST.accept_buff =
- (reg_trie_accepted*)SvPV_nolen(sv_accept_buff );
- }
- do {
- if (ST.accepted >= bufflen) {
- bufflen *= 2;
- ST.accept_buff =(reg_trie_accepted*)
- SvGROW(sv_accept_buff,
- bufflen * sizeof(reg_trie_accepted));
- }
- SvCUR_set(sv_accept_buff,SvCUR(sv_accept_buff)
- + sizeof(reg_trie_accepted));
-
-
- ST.accept_buff[ST.accepted].wordnum = got_wordnum;
- ST.accept_buff[ST.accepted].endpos = uc;
- ++ST.accepted;
- } while (trie->nextword && (got_wordnum= trie->nextword[got_wordnum]));
- }
-#undef got_wordnum
-
- DEBUG_TRIE_EXECUTE_r({
- DUMP_EXEC_POS( (char *)uc, scan, do_utf8 );
- PerlIO_printf( Perl_debug_log,
- "%*s %sState: %4"UVxf" Accepted: %4"UVxf" ",
- 2+depth * 2, "", PL_colors[4],
- (UV)state, (UV)ST.accepted );
- });
-
- if ( base ) {
- REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc,
- uscan, len, uvc, charid, foldlen,
- foldbuf, uniflags);
-
- if (charid &&
- (base + charid > trie->uniquecharcount )
- && (base + charid - 1 - trie->uniquecharcount
- < trie->lasttrans)
- && trie->trans[base + charid - 1 -
- trie->uniquecharcount].check == state)
- {
- state = trie->trans[base + charid - 1 -
- trie->uniquecharcount ].next;
- }
- else {
- state = 0;
- }
- uc += len;
-
- }
- else {
- state = 0;
- }
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "Charid:%3x CP:%4"UVxf" After State: %4"UVxf"%s\n",
- charid, uvc, (UV)state, PL_colors[5] );
- );
- }
- if (!ST.accepted )
- sayNO;
-
- DEBUG_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" possible matches%s\n",
- REPORT_CODE_OFF + depth * 2, "",
- PL_colors[4], (IV)ST.accepted, PL_colors[5] );
- );
- }}
- goto trie_first_try; /* jump into the fail handler */
- /* NOTREACHED */
- case TRIE_next_fail: /* we failed - try next alterative */
- if ( ST.jump) {
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- }
- trie_first_try:
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
-
- if ( ST.jump) {
- ST.lastparen = *PL_reglastparen;
- REGCP_SET(ST.cp);
- }
- if ( ST.accepted == 1 ) {
- /* only one choice left - just continue */
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ 0 ].wordnum-1, 0 );
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %sonly one match left: #%d <%s>%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[ 0 ].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- )
- : "not compiled under -Dr",
- PL_colors[5] );
- });
- PL_reginput = (char *)ST.accept_buff[ 0 ].endpos;
- /* in this case we free tmps/leave before we call regmatch
- as we wont be using accept_buff again. */
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- if ( !ST.jump || !ST.jump[ST.accept_buff[0].wordnum])
- scan = ST.B;
- else
- scan = ST.me + ST.jump[ST.accept_buff[0].wordnum];
- if (!has_cutgroup) {
- FREETMPS;
- LEAVE;
- } else {
- ST.accepted--;
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- }
-
- continue; /* execute rest of RE */
- }
-
- if ( !ST.accepted-- ) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sTRIE failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- FREETMPS;
- LEAVE;
- sayNO_SILENT;
- /*NOTREACHED*/
- }
-
- /*
- There are at least two accepting states left. Presumably
- the number of accepting states is going to be low,
- typically two. So we simply scan through to find the one
- with lowest wordnum. Once we find it, we swap the last
- state into its place and decrement the size. We then try to
- match the rest of the pattern at the point where the word
- ends. If we succeed, control just continues along the
- regex; if we fail we return here to try the next accepting
- state
- */
-
- {
- U32 best = 0;
- U32 cur;
- for( cur = 1 ; cur <= ST.accepted ; cur++ ) {
- DEBUG_TRIE_EXECUTE_r(
- PerlIO_printf( Perl_debug_log,
- "%*s %sgot %"IVdf" (%d) as best, looking at %"IVdf" (%d)%s\n",
- REPORT_CODE_OFF + depth * 2, "", PL_colors[4],
- (IV)best, ST.accept_buff[ best ].wordnum, (IV)cur,
- ST.accept_buff[ cur ].wordnum, PL_colors[5] );
- );
-
- if (ST.accept_buff[cur].wordnum <
- ST.accept_buff[best].wordnum)
- best = cur;
- }
-
- DEBUG_EXECUTE_r({
- AV *const trie_words
- = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]);
- SV ** const tmp = av_fetch( trie_words,
- ST.accept_buff[ best ].wordnum - 1, 0 );
- regnode *nextop=(!ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) ?
- ST.B :
- ST.me + ST.jump[ST.accept_buff[best].wordnum];
- SV *sv= tmp ? sv_newmortal() : NULL;
-
- PerlIO_printf( Perl_debug_log,
- "%*s %strying alternation #%d <%s> at node #%d %s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4],
- ST.accept_buff[best].wordnum,
- tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0,
- PL_colors[0], PL_colors[1],
- (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)
- ) : "not compiled under -Dr",
- REG_NODE_NUM(nextop),
- PL_colors[5] );
- });
-
- if ( best<ST.accepted ) {
- reg_trie_accepted tmp = ST.accept_buff[ best ];
- ST.accept_buff[ best ] = ST.accept_buff[ ST.accepted ];
- ST.accept_buff[ ST.accepted ] = tmp;
- best = ST.accepted;
- }
- PL_reginput = (char *)ST.accept_buff[ best ].endpos;
- if ( !ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) {
- scan = ST.B;
- } else {
- scan = ST.me + ST.jump[ST.accept_buff[best].wordnum];
- }
- PUSH_YES_STATE_GOTO(TRIE_next, scan);
- /* NOTREACHED */
- }
- /* NOTREACHED */
- case TRIE_next:
- /* we dont want to throw this away, see bug 57042*/
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- FREETMPS;
- LEAVE;
- sayYES;
-#undef ST
-
- case EXACT: {
- char *s = STRING(scan);
- ln = STR_LEN(scan);
- if (do_utf8 != UTF) {
- /* The target and the pattern have differing utf8ness. */
- char *l = locinput;
- const char * const e = s + ln;
-
- if (do_utf8) {
- /* The target is utf8, the pattern is not utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*(U8*)s) !=
- utf8n_to_uvuni((U8*)l, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- l += ulen;
- s ++;
- }
- }
- else {
- /* The target is not utf8, the pattern is utf8. */
- while (s < e) {
- STRLEN ulen;
- if (l >= PL_regeol)
- sayNO;
- if (NATIVE_TO_UNI(*((U8*)l)) !=
- utf8n_to_uvuni((U8*)s, UTF8_MAXBYTES, &ulen,
- uniflags))
- sayNO;
- s += ulen;
- l ++;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
- /* The target and the pattern have the same utf8ness. */
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr)
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && memNE(s, locinput, ln))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case EXACTFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case EXACTF: {
- char * const s = STRING(scan);
- ln = STR_LEN(scan);
-
- if (do_utf8 || UTF) {
- /* Either target or the pattern are utf8. */
- const char * const l = locinput;
- char *e = PL_regeol;
-
- if (ibcmp_utf8(s, 0, ln, (bool)UTF,
- l, &e, 0, do_utf8)) {
- /* One more case for the sharp s:
- * pack("U0U*", 0xDF) =~ /ss/i,
- * the 0xC3 0x9F are the UTF-8
- * byte sequence for the U+00DF. */
-
- if (!(do_utf8 &&
- toLOWER(s[0]) == 's' &&
- ln >= 2 &&
- toLOWER(s[1]) == 's' &&
- (U8)l[0] == 0xC3 &&
- e - l >= 2 &&
- (U8)l[1] == 0x9F))
- sayNO;
- }
- locinput = e;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Neither the target and the pattern are utf8. */
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- UCHARAT(s) != ((OP(scan) == EXACTF)
- ? PL_fold : PL_fold_locale)[nextchr])
- sayNO;
- if (PL_regeol - locinput < ln)
- sayNO;
- if (ln > 1 && (OP(scan) == EXACTF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln)))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case BOUNDL:
- case NBOUNDL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case BOUND:
- case NBOUND:
- /* was last char in word? */
- if (do_utf8) {
- if (locinput == PL_bostr)
- ln = '\n';
- else {
- const U8 * const r = reghop3((U8*)locinput, -1, (U8*)PL_bostr);
-
- ln = utf8n_to_uvchr(r, UTF8SKIP(r), 0, uniflags);
- }
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM_uni(ln);
- LOAD_UTF8_CHARCLASS_ALNUM();
- n = swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8);
- }
- else {
- ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln));
- n = isALNUM_LC_utf8((U8*)locinput);
- }
- }
- else {
- ln = (locinput != PL_bostr) ?
- UCHARAT(locinput - 1) : '\n';
- if (OP(scan) == BOUND || OP(scan) == NBOUND) {
- ln = isALNUM(ln);
- n = isALNUM(nextchr);
- }
- else {
- ln = isALNUM_LC(ln);
- n = isALNUM_LC(nextchr);
- }
- }
- if (((!ln) == (!n)) == (OP(scan) == BOUND ||
- OP(scan) == BOUNDL))
- sayNO;
- break;
- case ANYOF:
- if (do_utf8) {
- STRLEN inclasslen = PL_regeol - locinput;
-
- if (!reginclass(rex, scan, (U8*)locinput, &inclasslen, do_utf8))
- goto anyof_fail;
- if (locinput >= PL_regeol)
- sayNO;
- locinput += inclasslen ? inclasslen : UTF8SKIP(locinput);
- nextchr = UCHARAT(locinput);
- break;
- }
- else {
- if (nextchr < 0)
- nextchr = UCHARAT(locinput);
- if (!REGINCLASS(rex, scan, (U8*)locinput))
- goto anyof_fail;
- if (!nextchr && locinput >= PL_regeol)
- sayNO;
- nextchr = UCHARAT(++locinput);
- break;
- }
- anyof_fail:
- /* If we might have the case of the German sharp s
- * in a casefolding Unicode character class. */
-
- if (ANYOF_FOLD_SHARP_S(scan, locinput, PL_regeol)) {
- locinput += SHARP_S_SKIP;
- nextchr = UCHARAT(locinput);
- }
- else
- sayNO;
- break;
- /* Special char classes - The defines start on line 129 or so */
- CCC_TRY_AFF( ALNUM, ALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
- CCC_TRY_NEG(NALNUM, NALNUML, perl_word, "a", isALNUM_LC_utf8, isALNUM, isALNUM_LC);
-
- CCC_TRY_AFF( SPACE, SPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
- CCC_TRY_NEG(NSPACE, NSPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE, isSPACE_LC);
-
- CCC_TRY_AFF( DIGIT, DIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
- CCC_TRY_NEG(NDIGIT, NDIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC);
-
- case CLUMP: /* Match \X: logical Unicode character. This is defined as
- a Unicode extended Grapheme Cluster */
- /* From http://www.unicode.org/reports/tr29 (5.2 version). An
- extended Grapheme Cluster is:
-
- CR LF
- | Prepend* Begin Extend*
- | .
-
- Begin is (Hangul-syllable | ! Control)
- Extend is (Grapheme_Extend | Spacing_Mark)
- Control is [ GCB_Control CR LF ]
-
- The discussion below shows how the code for CLUMP is derived
- from this regex. Note that most of these concepts are from
- property values of the Grapheme Cluster Boundary (GCB) property.
- No code point can have multiple property values for a given
- property. Thus a code point in Prepend can't be in Control, but
- it must be in !Control. This is why Control above includes
- GCB_Control plus CR plus LF. The latter two are used in the GCB
- property separately, and so can't be in GCB_Control, even though
- they logically are controls. Control is not the same as gc=cc,
- but includes format and other characters as well.
-
- The Unicode definition of Hangul-syllable is:
- L+
- | (L* ( ( V | LV ) V* | LVT ) T*)
- | T+
- )
- Each of these is a value for the GCB property, and hence must be
- disjoint, so the order they are tested is immaterial, so the
- above can safely be changed to
- T+
- | L+
- | (L* ( LVT | ( V | LV ) V*) T*)
-
- The last two terms can be combined like this:
- L* ( L
- | (( LVT | ( V | LV ) V*) T*))
-
- And refactored into this:
- L* (L | LVT T* | V V* T* | LV V* T*)
-
- That means that if we have seen any L's at all we can quit
- there, but if the next character is a LVT, a V or and LV we
- should keep going.
-
- There is a subtlety with Prepend* which showed up in testing.
- Note that the Begin, and only the Begin is required in:
- | Prepend* Begin Extend*
- Also, Begin contains '! Control'. A Prepend must be a '!
- Control', which means it must be a Begin. What it comes down to
- is that if we match Prepend* and then find no suitable Begin
- afterwards, that if we backtrack the last Prepend, that one will
- be a suitable Begin.
- */
-
- if (locinput >= PL_regeol)
- sayNO;
- if (! do_utf8) {
-
- /* Match either CR LF or '.', as all the other possibilities
- * require utf8 */
- locinput++; /* Match the . or CR */
- if (nextchr == '\r'
- && locinput < PL_regeol
- && UCHARAT(locinput) == '\n') locinput++;
- }
- else {
-
- /* Utf8: See if is ( CR LF ); already know that locinput <
- * PL_regeol, so locinput+1 is in bounds */
- if (nextchr == '\r' && UCHARAT(locinput + 1) == '\n') {
- locinput += 2;
- }
- else {
- /* In case have to backtrack to beginning, then match '.' */
- char *starting = locinput;
-
- /* In case have to backtrack the last prepend */
- char *previous_prepend = 0;
-
- LOAD_UTF8_CHARCLASS_GCB();
-
- /* Match (prepend)* */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_prepend,
- (U8*)locinput, do_utf8))
- {
- previous_prepend = locinput;
- locinput += UTF8SKIP(locinput);
- }
-
- /* As noted above, if we matched a prepend character, but
- * the next thing won't match, back off the last prepend we
- * matched, as it is guaranteed to match the begin */
- if (previous_prepend
- && (locinput >= PL_regeol
- || ! swash_fetch(PL_utf8_X_begin,
- (U8*)locinput, do_utf8)))
- {
- locinput = previous_prepend;
- }
-
- /* Note that here we know PL_regeol > locinput, as we
- * tested that upon input to this switch case, and if we
- * moved locinput forward, we tested the result just above
- * and it either passed, or we backed off so that it will
- * now pass */
- if (! swash_fetch(PL_utf8_X_begin, (U8*)locinput, do_utf8)) {
-
- /* Here did not match the required 'Begin' in the
- * second term. So just match the very first
- * character, the '.' of the final term of the regex */
- locinput = starting + UTF8SKIP(starting);
- } else {
-
- /* Here is the beginning of a character that can have
- * an extender. It is either a hangul syllable, or a
- * non-control */
- if (swash_fetch(PL_utf8_X_non_hangul,
- (U8*)locinput, do_utf8))
- {
-
- /* Here not a Hangul syllable, must be a
- * ('! * Control') */
- locinput += UTF8SKIP(locinput);
- } else {
-
- /* Here is a Hangul syllable. It can be composed
- * of several individual characters. One
- * possibility is T+ */
- if (swash_fetch(PL_utf8_X_T,
- (U8*)locinput, do_utf8))
- {
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_T,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- } else {
-
- /* Here, not T+, but is a Hangul. That means
- * it is one of the others: L, LV, LVT or V,
- * and matches:
- * L* (L | LVT T* | V V* T* | LV V* T*) */
-
- /* Match L* */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_L,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
-
- /* Here, have exhausted L*. If the next
- * character is not an LV, LVT nor V, it means
- * we had to have at least one L, so matches L+
- * in the original equation, we have a complete
- * hangul syllable. Are done. */
-
- if (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_LV_LVT_V,
- (U8*)locinput, do_utf8))
- {
-
- /* Otherwise keep going. Must be LV, LVT
- * or V. See if LVT */
- if (swash_fetch(PL_utf8_X_LVT,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- } else {
-
- /* Must be V or LV. Take it, then
- * match V* */
- locinput += UTF8SKIP(locinput);
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_V,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- }
-
- /* And any of LV, LVT, or V can be followed
- * by T* */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_T,
- (U8*)locinput,
- do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- }
- }
- }
-
- /* Match any extender */
- while (locinput < PL_regeol
- && swash_fetch(PL_utf8_X_extend,
- (U8*)locinput, do_utf8))
- {
- locinput += UTF8SKIP(locinput);
- }
- }
- }
- if (locinput > PL_regeol) sayNO;
- }
- nextchr = UCHARAT(locinput);
- break;
-
- case NREFFL:
- {
- char *s;
- char type;
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case NREF:
- case NREFF:
- type = OP(scan);
- n = reg_check_named_buff_matched(rex,scan);
-
- if ( n ) {
- type = REF + ( type - NREF );
- goto do_ref;
- } else {
- sayNO;
- }
- /* unreached */
- case REFFL:
- PL_reg_flags |= RF_tainted;
- /* FALL THROUGH */
- case REF:
- case REFF:
- n = ARG(scan); /* which paren pair */
- type = OP(scan);
- do_ref:
- ln = PL_regoffs[n].start;
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (*PL_reglastparen < n || ln == -1)
- sayNO; /* Do not match unless seen CLOSEn. */
- if (ln == PL_regoffs[n].end)
- break;
-
- s = PL_bostr + ln;
- if (do_utf8 && type != REF) { /* REF can do byte comparison */
- char *l = locinput;
- const char *e = PL_bostr + PL_regoffs[n].end;
- /*
- * Note that we can't do the "other character" lookup trick as
- * in the 8-bit case (no pun intended) because in Unicode we
- * have to map both upper and title case to lower case.
- */
- if (type == REFF) {
- while (s < e) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- if (l >= PL_regeol)
- sayNO;
- toLOWER_utf8((U8*)s, tmpbuf1, &ulen1);
- toLOWER_utf8((U8*)l, tmpbuf2, &ulen2);
- if (ulen1 != ulen2 || memNE((char *)tmpbuf1, (char *)tmpbuf2, ulen1))
- sayNO;
- s += ulen1;
- l += ulen2;
- }
- }
- locinput = l;
- nextchr = UCHARAT(locinput);
- break;
- }
-
- /* Inline the first character, for speed. */
- if (UCHARAT(s) != nextchr &&
- (type == REF ||
- (UCHARAT(s) != (type == REFF
- ? PL_fold : PL_fold_locale)[nextchr])))
- sayNO;
- ln = PL_regoffs[n].end - ln;
- if (locinput + ln > PL_regeol)
- sayNO;
- if (ln > 1 && (type == REF
- ? memNE(s, locinput, ln)
- : (type == REFF
- ? ibcmp(s, locinput, ln)
- : ibcmp_locale(s, locinput, ln))))
- sayNO;
- locinput += ln;
- nextchr = UCHARAT(locinput);
- break;
- }
- case NOTHING:
- case TAIL:
- break;
- case BACK:
- break;
-
-#undef ST
-#define ST st->u.eval
- {
- SV *ret;
- REGEXP *re_sv;
- regexp *re;
- regexp_internal *rei;
- regnode *startpoint;
-
- case GOSTART:
- case GOSUB: /* /(...(?1))/ /(...(?&foo))/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if (cur_eval->u.eval.close_paren == (U32)ARG(scan))
- Perl_croak(aTHX_ "Infinite recursion in regex");
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_
- "Pattern subroutine nesting without pos change"
- " exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- re_sv = rex_sv;
- re = rex;
- rei = rexi;
- (void)ReREFCNT_inc(rex_sv);
- if (OP(scan)==GOSUB) {
- startpoint = scan + ARG2L(scan);
- ST.close_paren = ARG(scan);
- } else {
- startpoint = rei->program+1;
- ST.close_paren = 0;
- }
- goto eval_recurse_doit;
- /* NOTREACHED */
- case EVAL: /* /(?{A})B/ /(??{A})B/ and /(?(?{A})X|Y)B/ */
- if (cur_eval && cur_eval->locinput==locinput) {
- if ( ++nochange_depth > max_nochange_depth )
- Perl_croak(aTHX_ "EVAL without pos change exceeded limit in regex");
- } else {
- nochange_depth = 0;
- }
- {
- /* execute the code in the {...} */
- dSP;
- SV ** const before = SP;
- OP_4tree * const oop = PL_op;
- COP * const ocurcop = PL_curcop;
- PAD *old_comppad;
- char *saved_regeol = PL_regeol;
-
- n = ARG(scan);
- PL_op = (OP_4tree*)rexi->data->data[n];
- DEBUG_STATE_r( PerlIO_printf(Perl_debug_log,
- " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) );
- PAD_SAVE_LOCAL(old_comppad, (PAD*)rexi->data->data[n + 2]);
- PL_regoffs[0].end = PL_reg_magic->mg_len = locinput - PL_bostr;
-
- if (sv_yes_mark) {
- SV *sv_mrk = get_sv("REGMARK", 1);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- CALLRUNOPS(aTHX); /* Scalar context. */
- SPAGAIN;
- if (SP == before)
- ret = &PL_sv_undef; /* protect against empty (?{}) blocks. */
- else {
- ret = POPs;
- PUTBACK;
- }
-
- PL_op = oop;
- PAD_RESTORE_LOCAL(old_comppad);
- PL_curcop = ocurcop;
- PL_regeol = saved_regeol;
- if (!logical) {
- /* /(?{...})/ */
- sv_setsv(save_scalar(PL_replgv), ret);
- break;
- }
- }
- if (logical == 2) { /* Postponed subexpression: /(??{...})/ */
- logical = 0;
- {
- /* extract RE object from returned value; compiling if
- * necessary */
- MAGIC *mg = NULL;
- REGEXP *rx = NULL;
-
- if (SvROK(ret)) {
- SV *const sv = SvRV(ret);
-
- if (SvTYPE(sv) == SVt_REGEXP) {
- rx = (REGEXP*) sv;
- } else if (SvSMAGICAL(sv)) {
- mg = mg_find(sv, PERL_MAGIC_qr);
- assert(mg);
- }
- } else if (SvTYPE(ret) == SVt_REGEXP) {
- rx = (REGEXP*) ret;
- } else if (SvSMAGICAL(ret)) {
- if (SvGMAGICAL(ret)) {
- /* I don't believe that there is ever qr magic
- here. */
- assert(!mg_find(ret, PERL_MAGIC_qr));
- sv_unmagic(ret, PERL_MAGIC_qr);
- }
- else {
- mg = mg_find(ret, PERL_MAGIC_qr);
- /* testing suggests mg only ends up non-NULL for
- scalars who were upgraded and compiled in the
- else block below. In turn, this is only
- triggered in the "postponed utf8 string" tests
- in t/op/pat.t */
- }
- }
-
- if (mg) {
- rx = (REGEXP *) mg->mg_obj; /*XXX:dmq*/
- assert(rx);
- }
- if (rx) {
- rx = reg_temp_copy(NULL, rx);
- }
- else {
- U32 pm_flags = 0;
- const I32 osize = PL_regsize;
-
- if (DO_UTF8(ret)) {
- assert (SvUTF8(ret));
- } else if (SvUTF8(ret)) {
- /* Not doing UTF-8, despite what the SV says. Is
- this only if we're trapped in use 'bytes'? */
- /* Make a copy of the octet sequence, but without
- the flag on, as the compiler now honours the
- SvUTF8 flag on ret. */
- STRLEN len;
- const char *const p = SvPV(ret, len);
- ret = newSVpvn_flags(p, len, SVs_TEMP);
- }
- rx = CALLREGCOMP(ret, pm_flags);
- if (!(SvFLAGS(ret)
- & (SVs_TEMP | SVs_PADTMP | SVf_READONLY
- | SVs_GMG))) {
- /* This isn't a first class regexp. Instead, it's
- caching a regexp onto an existing, Perl visible
- scalar. */
- sv_magic(ret, MUTABLE_SV(rx), PERL_MAGIC_qr, 0, 0);
- }
- PL_regsize = osize;
- }
- re_sv = rx;
- re = (struct regexp *)SvANY(rx);
- }
- RXp_MATCH_COPIED_off(re);
- re->subbeg = rex->subbeg;
- re->sublen = rex->sublen;
- rei = RXi_GET(re);
- DEBUG_EXECUTE_r(
- debug_start_match(re_sv, do_utf8, locinput, PL_regeol,
- "Matching embedded");
- );
- startpoint = rei->program + 1;
- ST.close_paren = 0; /* only used for GOSUB */
- /* borrowed from regtry */
- if (PL_reg_start_tmpl <= re->nparens) {
- PL_reg_start_tmpl = re->nparens*3/2 + 3;
- if(PL_reg_start_tmp)
- Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- else
- Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
- }
-
- eval_recurse_doit: /* Share code with GOSUB below this line */
- /* run the pattern returned from (??{...}) */
- ST.cp = regcppush(0); /* Save *all* the positions. */
- REGCP_SET(ST.lastcp);
-
- PL_regoffs = re->offs; /* essentially NOOP on GOSUB */
-
- /* see regtry, specifically PL_reglast(?:close)?paren is a pointer! (i dont know why) :dmq */
- PL_reglastparen = &re->lastparen;
- PL_reglastcloseparen = &re->lastcloseparen;
- re->lastparen = 0;
- re->lastcloseparen = 0;
-
- PL_reginput = locinput;
- PL_regsize = 0;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
-
- ST.toggle_reg_flags = PL_reg_flags;
- if (RX_UTF8(re_sv))
- PL_reg_flags |= RF_utf8;
- else
- PL_reg_flags &= ~RF_utf8;
- ST.toggle_reg_flags ^= PL_reg_flags; /* diff of old and new */
-
- ST.prev_rex = rex_sv;
- ST.prev_curlyx = cur_curlyx;
- SETREX(rex_sv,re_sv);
- rex = re;
- rexi = rei;
- cur_curlyx = NULL;
- ST.B = next;
- ST.prev_eval = cur_eval;
- cur_eval = st;
- /* now continue from first node in postoned RE */
- PUSH_YES_STATE_GOTO(EVAL_AB, startpoint);
- /* NOTREACHED */
- }
- /* logical is 1, /(?(?{...})X|Y)/ */
- sw = (bool)SvTRUE(ret);
- logical = 0;
- break;
- }
-
- case EVAL_AB: /* cleanup after a successful (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- regcpblow(ST.cp);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
- /* also update PL_regoffs */
- PL_regoffs = rex->offs;
-
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayYES;
-
-
- case EVAL_AB_fail: /* unsuccessfully ran A or B in (??{A})B */
- /* note: this is called twice; first after popping B, then A */
- PL_reg_flags ^= ST.toggle_reg_flags;
- ReREFCNT_dec(rex_sv);
- SETREX(rex_sv,ST.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- PL_reginput = locinput;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- cur_eval = ST.prev_eval;
- cur_curlyx = ST.prev_curlyx;
- /* XXXX This is too dramatic a measure... */
- PL_reg_maxiter = 0;
- if ( nochange_depth )
- nochange_depth--;
- sayNO_SILENT;
-#undef ST
-
- case OPEN:
- n = ARG(scan); /* which paren pair */
- PL_reg_start_tmp[n] = locinput;
- if (n > PL_regsize)
- PL_regsize = n;
- lastopen = n;
- break;
- case CLOSE:
- n = ARG(scan); /* which paren pair */
- PL_regoffs[n].start = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if (cur_eval && cur_eval->u.eval.close_paren == n) {
- goto fake_end;
- }
- break;
- case ACCEPT:
- if (ARG(scan)){
- regnode *cursor;
- for (cursor=scan;
- cursor && OP(cursor)!=END;
- cursor=regnext(cursor))
- {
- if ( OP(cursor)==CLOSE ){
- n = ARG(cursor);
- if ( n <= lastopen ) {
- PL_regoffs[n].start
- = PL_reg_start_tmp[n] - PL_bostr;
- PL_regoffs[n].end = locinput - PL_bostr;
- /*if (n > PL_regsize)
- PL_regsize = n;*/
- if (n > *PL_reglastparen)
- *PL_reglastparen = n;
- *PL_reglastcloseparen = n;
- if ( n == ARG(scan) || (cur_eval &&
- cur_eval->u.eval.close_paren == n))
- break;
- }
- }
- }
- }
- goto fake_end;
- /*NOTREACHED*/
- case GROUPP:
- n = ARG(scan); /* which paren pair */
- sw = (bool)(*PL_reglastparen >= n && PL_regoffs[n].end != -1);
- break;
- case NGROUPP:
- /* reg_check_named_buff_matched returns 0 for no match */
- sw = (bool)(0 < reg_check_named_buff_matched(rex,scan));
- break;
- case INSUBP:
- n = ARG(scan);
- sw = (cur_eval && (!n || cur_eval->u.eval.close_paren == n));
- break;
- case DEFINEP:
- sw = 0;
- break;
- case IFTHEN:
- PL_reg_leftiter = PL_reg_maxiter; /* Void cache */
- if (sw)
- next = NEXTOPER(NEXTOPER(scan));
- else {
- next = scan + ARG(scan);
- if (OP(next) == IFTHEN) /* Fake one. */
- next = NEXTOPER(NEXTOPER(next));
- }
- break;
- case LOGICAL:
- logical = scan->flags;
- break;
-
-/*******************************************************************
-
-The CURLYX/WHILEM pair of ops handle the most generic case of the /A*B/
-pattern, where A and B are subpatterns. (For simple A, CURLYM or
-STAR/PLUS/CURLY/CURLYN are used instead.)
-
-A*B is compiled as <CURLYX><A><WHILEM><B>
-
-On entry to the subpattern, CURLYX is called. This pushes a CURLYX
-state, which contains the current count, initialised to -1. It also sets
-cur_curlyx to point to this state, with any previous value saved in the
-state block.
-
-CURLYX then jumps straight to the WHILEM op, rather than executing A,
-since the pattern may possibly match zero times (i.e. it's a while {} loop
-rather than a do {} while loop).
-
-Each entry to WHILEM represents a successful match of A. The count in the
-CURLYX block is incremented, another WHILEM state is pushed, and execution
-passes to A or B depending on greediness and the current count.
-
-For example, if matching against the string a1a2a3b (where the aN are
-substrings that match /A/), then the match progresses as follows: (the
-pushed states are interspersed with the bits of strings matched so far):
-
- <CURLYX cnt=-1>
- <CURLYX cnt=0><WHILEM>
- <CURLYX cnt=1><WHILEM> a1 <WHILEM>
- <CURLYX cnt=2><WHILEM> a1 <WHILEM> a2 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM>
- <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> b
-
-(Contrast this with something like CURLYM, which maintains only a single
-backtrack state:
-
- <CURLYM cnt=0> a1
- a1 <CURLYM cnt=1> a2
- a1 a2 <CURLYM cnt=2> a3
- a1 a2 a3 <CURLYM cnt=3> b
-)
-
-Each WHILEM state block marks a point to backtrack to upon partial failure
-of A or B, and also contains some minor state data related to that
-iteration. The CURLYX block, pointed to by cur_curlyx, contains the
-overall state, such as the count, and pointers to the A and B ops.
-
-This is complicated slightly by nested CURLYX/WHILEM's. Since cur_curlyx
-must always point to the *current* CURLYX block, the rules are:
-
-When executing CURLYX, save the old cur_curlyx in the CURLYX state block,
-and set cur_curlyx to point the new block.
-
-When popping the CURLYX block after a successful or unsuccessful match,
-restore the previous cur_curlyx.
-
-When WHILEM is about to execute B, save the current cur_curlyx, and set it
-to the outer one saved in the CURLYX block.
-
-When popping the WHILEM block after a successful or unsuccessful B match,
-restore the previous cur_curlyx.
-
-Here's an example for the pattern (AI* BI)*BO
-I and O refer to inner and outer, C and W refer to CURLYX and WHILEM:
-
-cur_
-curlyx backtrack stack
------- ---------------
-NULL
-CO <CO prev=NULL> <WO>
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-NULL <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi <WO prev=CO> bo
-
-At this point the pattern succeeds, and we work back down the stack to
-clean up, restoring as we go:
-
-CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi
-CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai
-CO <CO prev=NULL> <WO>
-NULL
-
-*******************************************************************/
-
-#define ST st->u.curlyx
-
- case CURLYX: /* start of /A*B/ (for complex A) */
- {
- /* No need to save/restore up to this paren */
- I32 parenfloor = scan->flags;
-
- assert(next); /* keep Coverity happy */
- if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */
- next += ARG(next);
-
- /* XXXX Probably it is better to teach regpush to support
- parenfloor > PL_regsize... */
- if (parenfloor > (I32)*PL_reglastparen)
- parenfloor = *PL_reglastparen; /* Pessimization... */
-
- ST.prev_curlyx= cur_curlyx;
- cur_curlyx = st;
- ST.cp = PL_savestack_ix;
-
- /* these fields contain the state of the current curly.
- * they are accessed by subsequent WHILEMs */
- ST.parenfloor = parenfloor;
- ST.min = ARG1(scan);
- ST.max = ARG2(scan);
- ST.A = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
- ST.B = next;
- ST.minmod = minmod;
- minmod = 0;
- ST.count = -1; /* this will be updated by WHILEM */
- ST.lastloc = NULL; /* this will be updated by WHILEM */
-
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYX_end, PREVOPER(next));
- /* NOTREACHED */
- }
-
- case CURLYX_end: /* just finished matching all of A*B */
- cur_curlyx = ST.prev_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case CURLYX_end_fail: /* just failed to match all of A*B */
- regcpblow(ST.cp);
- cur_curlyx = ST.prev_curlyx;
- sayNO;
- /* NOTREACHED */
-
-
-#undef ST
-#define ST st->u.whilem
-
- case WHILEM: /* just matched an A in /A*B/ (for complex A) */
- {
- /* see the discussion above about CURLYX/WHILEM */
- I32 n;
- assert(cur_curlyx); /* keep Coverity happy */
- n = ++cur_curlyx->u.curlyx.count; /* how many A's matched */
- ST.save_lastloc = cur_curlyx->u.curlyx.lastloc;
- ST.cache_offset = 0;
- ST.cache_mask = 0;
-
- PL_reginput = locinput;
-
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: matched %ld out of %ld..%ld\n",
- REPORT_CODE_OFF+depth*2, "", (long)n,
- (long)cur_curlyx->u.curlyx.min,
- (long)cur_curlyx->u.curlyx.max)
- );
-
- /* First just match a string of min A's. */
-
- if (n < cur_curlyx->u.curlyx.min) {
- cur_curlyx->u.curlyx.lastloc = locinput;
- PUSH_STATE_GOTO(WHILEM_A_pre, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
-
- /* If degenerate A matches "", assume A done. */
-
- if (locinput == cur_curlyx->u.curlyx.lastloc) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: empty match detected, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- goto do_whilem_B_max;
- }
-
- /* super-linear cache processing */
-
- if (scan->flags) {
-
- if (!PL_reg_maxiter) {
- /* start the countdown: Postpone detection until we
- * know the match is not *that* much linear. */
- PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4);
- /* possible overflow for long strings and many CURLYX's */
- if (PL_reg_maxiter < 0)
- PL_reg_maxiter = I32_MAX;
- PL_reg_leftiter = PL_reg_maxiter;
- }
-
- if (PL_reg_leftiter-- == 0) {
- /* initialise cache */
- const I32 size = (PL_reg_maxiter + 7)/8;
- if (PL_reg_poscache) {
- if ((I32)PL_reg_poscache_size < size) {
- Renew(PL_reg_poscache, size, char);
- PL_reg_poscache_size = size;
- }
- Zero(PL_reg_poscache, size, char);
- }
- else {
- PL_reg_poscache_size = size;
- Newxz(PL_reg_poscache, size, char);
- }
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%swhilem: Detected a super-linear match, switching on caching%s...\n",
- PL_colors[4], PL_colors[5])
- );
- }
-
- if (PL_reg_leftiter < 0) {
- /* have we already failed at this position? */
- I32 offset, mask;
- offset = (scan->flags & 0xf) - 1
- + (locinput - PL_bostr) * (scan->flags>>4);
- mask = 1 << (offset % 8);
- offset /= 8;
- if (PL_reg_poscache[offset] & mask) {
- DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log,
- "%*s whilem: (cache) already tried at this position...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- sayNO; /* cache records failure */
- }
- ST.cache_offset = offset;
- ST.cache_mask = mask;
- }
- }
-
- /* Prefer B over A for minimal matching. */
-
- if (cur_curlyx->u.curlyx.minmod) {
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- ST.cp = regcppush(ST.save_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_YES_STATE_GOTO(WHILEM_B_min, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
- }
-
- /* Prefer A over B for maximal matching. */
-
- if (n < cur_curlyx->u.curlyx.max) { /* More greed allowed? */
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- cur_curlyx->u.curlyx.lastloc = locinput;
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_max, cur_curlyx->u.curlyx.A);
- /* NOTREACHED */
- }
- goto do_whilem_B_max;
- }
- /* NOTREACHED */
-
- case WHILEM_B_min: /* just matched B in a minimal match */
- case WHILEM_B_max: /* just matched B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- sayYES;
- /* NOTREACHED */
-
- case WHILEM_B_max_fail: /* just failed to match B in a maximal match */
- cur_curlyx = ST.save_curlyx;
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_min_fail: /* just failed to match A in a minimal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
- /* FALL THROUGH */
- case WHILEM_A_pre_fail: /* just failed to match even minimal A */
- cur_curlyx->u.curlyx.lastloc = ST.save_lastloc;
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- /* NOTREACHED */
-
- case WHILEM_A_max_fail: /* just failed to match A in a maximal match */
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex); /* Restore some previous $<digit>s? */
- PL_reginput = locinput;
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s whilem: failed, trying continuation...\n",
- REPORT_CODE_OFF+depth*2, "")
- );
- do_whilem_B_max:
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
-
- /* now try B */
- ST.save_curlyx = cur_curlyx;
- cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx;
- PUSH_YES_STATE_GOTO(WHILEM_B_max, ST.save_curlyx->u.curlyx.B);
- /* NOTREACHED */
-
- case WHILEM_B_min_fail: /* just failed to match B in a minimal match */
- cur_curlyx = ST.save_curlyx;
- REGCP_UNWIND(ST.lastcp);
- regcppop(rex);
-
- if (cur_curlyx->u.curlyx.count >= cur_curlyx->u.curlyx.max) {
- /* Maximum greed exceeded */
- if (cur_curlyx->u.curlyx.count >= REG_INFTY
- && ckWARN(WARN_REGEXP)
- && !(PL_reg_flags & RF_warned))
- {
- PL_reg_flags |= RF_warned;
- Perl_warner(aTHX_ packWARN(WARN_REGEXP),
- "%s limit (%d) exceeded",
- "Complex regular subexpression recursion",
- REG_INFTY - 1);
- }
- cur_curlyx->u.curlyx.count--;
- CACHEsayNO;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%*s trying longer...\n", REPORT_CODE_OFF+depth*2, "")
- );
- /* Try grabbing another A and see if it helps. */
- PL_reginput = locinput;
- cur_curlyx->u.curlyx.lastloc = locinput;
- ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor);
- REGCP_SET(ST.lastcp);
- PUSH_STATE_GOTO(WHILEM_A_min, ST.save_curlyx->u.curlyx.A);
- /* NOTREACHED */
-
-#undef ST
-#define ST st->u.branch
-
- case BRANCHJ: /* /(...|A|...)/ with long next pointer */
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- scan = NEXTOPER(scan);
- /* FALL THROUGH */
-
- case BRANCH: /* /(...|A|...)/ */
- scan = NEXTOPER(scan); /* scan now points to inner node */
- ST.lastparen = *PL_reglastparen;
- ST.next_branch = next;
- REGCP_SET(ST.cp);
- PL_reginput = locinput;
-
- /* Now go into the branch */
- if (has_cutgroup) {
- PUSH_YES_STATE_GOTO(BRANCH_next, scan);
- } else {
- PUSH_STATE_GOTO(BRANCH_next, scan);
- }
- /* NOTREACHED */
- case CUTGROUP:
- PL_reginput = locinput;
- sv_yes_mark = st->u.mark.mark_name = scan->flags ? NULL :
- MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(CUTGROUP_next,next);
- /* NOTREACHED */
- case CUTGROUP_next_fail:
- do_cutgroup = 1;
- no_final = 1;
- if (st->u.mark.mark_name)
- sv_commit = st->u.mark.mark_name;
- sayNO;
- /* NOTREACHED */
- case BRANCH_next:
- sayYES;
- /* NOTREACHED */
- case BRANCH_next_fail: /* that branch failed; try the next, if any */
- if (do_cutgroup) {
- do_cutgroup = 0;
- no_final = 0;
- }
- REGCP_UNWIND(ST.cp);
- for (n = *PL_reglastparen; n > ST.lastparen; n--)
- PL_regoffs[n].end = -1;
- *PL_reglastparen = n;
- /*dmq: *PL_reglastcloseparen = n; */
- scan = ST.next_branch;
- /* no more branches? */
- if (!scan || (OP(scan) != BRANCH && OP(scan) != BRANCHJ)) {
- DEBUG_EXECUTE_r({
- PerlIO_printf( Perl_debug_log,
- "%*s %sBRANCH failed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4],
- PL_colors[5] );
- });
- sayNO_SILENT;
- }
- continue; /* execute next BRANCH[J] op */
- /* NOTREACHED */
-
- case MINMOD:
- minmod = 1;
- break;
-
-#undef ST
-#define ST st->u.curlym
-
- case CURLYM: /* /A{m,n}B/ where A is fixed-length */
-
- /* This is an optimisation of CURLYX that enables us to push
- * only a single backtracking state, no matter how many matches
- * there are in {m,n}. It relies on the pattern being constant
- * length, with no parens to influence future backrefs
- */
-
- ST.me = scan;
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
-
- /* if paren positive, emulate an OPEN/CLOSE around A */
- if (ST.me->flags) {
- U32 paren = ST.me->flags;
- if (paren > PL_regsize)
- PL_regsize = paren;
- if (paren > *PL_reglastparen)
- *PL_reglastparen = paren;
- scan += NEXT_OFF(scan); /* Skip former OPEN. */
- }
- ST.A = scan;
- ST.B = next;
- ST.alen = 0;
- ST.count = 0;
- ST.minmod = minmod;
- minmod = 0;
- ST.c1 = CHRTEST_UNINIT;
- REGCP_SET(ST.cp);
-
- if (!(ST.minmod ? ARG1(ST.me) : ARG2(ST.me))) /* min/max */
- goto curlym_do_B;
-
- curlym_do_A: /* execute the A in /A{m,n}B/ */
- PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(CURLYM_A, ST.A); /* match A */
- /* NOTREACHED */
-
- case CURLYM_A: /* we've just matched an A */
- locinput = st->locinput;
- nextchr = UCHARAT(locinput);
-
- ST.count++;
- /* after first match, determine A's length: u.curlym.alen */
- if (ST.count == 1) {
- if (PL_reg_match_utf8) {
- char *s = locinput;
- while (s < PL_reginput) {
- ST.alen++;
- s += UTF8SKIP(s);
- }
- }
- else {
- ST.alen = PL_reginput - locinput;
- }
- if (ST.alen == 0)
- ST.count = ST.minmod ? ARG1(ST.me) : ARG2(ST.me);
- }
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM now matched %"IVdf" times, len=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)), "",
- (IV) ST.count, (IV)ST.alen)
- );
-
- locinput = PL_reginput;
-
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- goto fake_end;
-
- {
- I32 max = (ST.minmod ? ARG1(ST.me) : ARG2(ST.me));
- if ( max == REG_INFTY || ST.count < max )
- goto curlym_do_A; /* try to match another A */
- }
- goto curlym_do_B; /* try to match B */
-
- case CURLYM_A_fail: /* just failed to match an A */
- REGCP_UNWIND(ST.cp);
-
- if (ST.minmod || ST.count < ARG1(ST.me) /* min*/
- || (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags))
- sayNO;
-
- curlym_do_B: /* execute the B in /A{m,n}B/ */
- PL_reginput = locinput;
- if (ST.c1 == CHRTEST_UNINIT) {
- /* calculate c1 and c2 for possible match of 1st char
- * following curly */
- ST.c1 = ST.c2 = CHRTEST_VOID;
- if (HAS_TEXT(ST.B) || JUMPABLE(ST.B)) {
- regnode *text_node = ST.B;
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
- /* this used to be
-
- (HAS_TEXT(text_node) && PL_regkind[OP(text_node)] == EXACT)
-
- But the former is redundant in light of the latter.
-
- if this changes back then the macro for
- IS_TEXT and friends need to change.
- */
- if (PL_regkind[OP(text_node)] == EXACT)
- {
-
- ST.c1 = (U8)*STRING(text_node);
- ST.c2 =
- (IS_TEXTF(text_node))
- ? PL_fold[ST.c1]
- : (IS_TEXTFL(text_node))
- ? PL_fold_locale[ST.c1]
- : ST.c1;
- }
- }
- }
-
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM trying tail with matches=%"IVdf"...\n",
- (int)(REPORT_CODE_OFF+(depth*2)),
- "", (IV)ST.count)
- );
- if (ST.c1 != CHRTEST_VOID
- && UCHARAT(PL_reginput) != ST.c1
- && UCHARAT(PL_reginput) != ST.c2)
- {
- /* simulate B failing */
- DEBUG_OPTIMISE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s CURLYM Fast bail c1=%"IVdf" c2=%"IVdf"\n",
- (int)(REPORT_CODE_OFF+(depth*2)),"",
- (IV)ST.c1,(IV)ST.c2
- ));
- state_num = CURLYM_B_fail;
- goto reenter_switch;
- }
-
- if (ST.me->flags) {
- /* mark current A as captured */
- I32 paren = ST.me->flags;
- if (ST.count) {
- PL_regoffs[paren].start
- = HOPc(PL_reginput, -ST.alen) - PL_bostr;
- PL_regoffs[paren].end = PL_reginput - PL_bostr;
- /*dmq: *PL_reglastcloseparen = paren; */
- }
- else
- PL_regoffs[paren].end = -1;
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.me->flags)
- {
- if (ST.count)
- goto fake_end;
- else
- sayNO;
- }
- }
-
- PUSH_STATE_GOTO(CURLYM_B, ST.B); /* match B */
- /* NOTREACHED */
-
- case CURLYM_B_fail: /* just failed to match a B */
- REGCP_UNWIND(ST.cp);
- if (ST.minmod) {
- I32 max = ARG2(ST.me);
- if (max != REG_INFTY && ST.count == max)
- sayNO;
- goto curlym_do_A; /* try to match a further A */
- }
- /* backtrack one A */
- if (ST.count == ARG1(ST.me) /* min */)
- sayNO;
- ST.count--;
- locinput = HOPc(locinput, -ST.alen);
- goto curlym_do_B; /* try to match B */
-
-#undef ST
-#define ST st->u.curly
-
-#define CURLY_SETPAREN(paren, success) \
- if (paren) { \
- if (success) { \
- PL_regoffs[paren].start = HOPc(locinput, -1) - PL_bostr; \
- PL_regoffs[paren].end = locinput - PL_bostr; \
- *PL_reglastcloseparen = paren; \
- } \
- else \
- PL_regoffs[paren].end = -1; \
- }
-
- case STAR: /* /A*B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 0;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case PLUS: /* /A+B/ where A is width 1 */
- ST.paren = 0;
- ST.min = 1;
- ST.max = REG_INFTY;
- scan = NEXTOPER(scan);
- goto repeat;
- case CURLYN: /* /(A){m,n}B/ where A is width 1 */
- ST.paren = scan->flags; /* Which paren to set */
- if (ST.paren > PL_regsize)
- PL_regsize = ST.paren;
- if (ST.paren > *PL_reglastparen)
- *PL_reglastparen = ST.paren;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- ST.min=1;
- ST.max=1;
- }
- scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE);
- goto repeat;
- case CURLY: /* /A{m,n}B/ where A is width 1 */
- ST.paren = 0;
- ST.min = ARG1(scan); /* min to match */
- ST.max = ARG2(scan); /* max to match */
- scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
- repeat:
- /*
- * Lookahead to avoid useless match attempts
- * when we know what character comes next.
- *
- * Used to only do .*x and .*?x, but now it allows
- * for )'s, ('s and (?{ ... })'s to be in the way
- * of the quantifier and the EXACT-like node. -- japhy
- */
-
- if (ST.min > ST.max) /* XXX make this a compile-time check? */
- sayNO;
- if (HAS_TEXT(next) || JUMPABLE(next)) {
- U8 *s;
- regnode *text_node = next;
-
- if (! HAS_TEXT(text_node))
- FIND_NEXT_IMPT(text_node);
-
- if (! HAS_TEXT(text_node))
- ST.c1 = ST.c2 = CHRTEST_VOID;
- else {
- if ( PL_regkind[OP(text_node)] != EXACT ) {
- ST.c1 = ST.c2 = CHRTEST_VOID;
- goto assume_ok_easy;
- }
- else
- s = (U8*)STRING(text_node);
-
- /* Currently we only get here when
-
- PL_rekind[OP(text_node)] == EXACT
-
- if this changes back then the macro for IS_TEXT and
- friends need to change. */
- if (!UTF) {
- ST.c2 = ST.c1 = *s;
- if (IS_TEXTF(text_node))
- ST.c2 = PL_fold[ST.c1];
- else if (IS_TEXTFL(text_node))
- ST.c2 = PL_fold_locale[ST.c1];
- }
- else { /* UTF */
- if (IS_TEXTF(text_node)) {
- STRLEN ulen1, ulen2;
- U8 tmpbuf1[UTF8_MAXBYTES_CASE+1];
- U8 tmpbuf2[UTF8_MAXBYTES_CASE+1];
-
- to_utf8_lower((U8*)s, tmpbuf1, &ulen1);
- to_utf8_upper((U8*)s, tmpbuf2, &ulen2);
-#ifdef EBCDIC
- ST.c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
- ST.c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXLEN, 0,
- ckWARN(WARN_UTF8) ?
- 0 : UTF8_ALLOW_ANY);
-#else
- ST.c1 = utf8n_to_uvuni(tmpbuf1, UTF8_MAXBYTES, 0,
- uniflags);
- ST.c2 = utf8n_to_uvuni(tmpbuf2, UTF8_MAXBYTES, 0,
- uniflags);
-#endif
- }
- else {
- ST.c2 = ST.c1 = utf8n_to_uvchr(s, UTF8_MAXBYTES, 0,
- uniflags);
- }
- }
- }
- }
- else
- ST.c1 = ST.c2 = CHRTEST_VOID;
- assume_ok_easy:
-
- ST.A = scan;
- ST.B = next;
- PL_reginput = locinput;
- if (minmod) {
- minmod = 0;
- if (ST.min && regrepeat(rex, ST.A, ST.min, depth) < ST.min)
- sayNO;
- ST.count = ST.min;
- locinput = PL_reginput;
- REGCP_SET(ST.cp);
- if (ST.c1 == CHRTEST_VOID)
- goto curly_try_B_min;
-
- ST.oldloc = locinput;
-
- /* set ST.maxpos to the furthest point along the
- * string that could possibly match */
- if (ST.max == REG_INFTY) {
- ST.maxpos = PL_regeol - 1;
- if (do_utf8)
- while (UTF8_IS_CONTINUATION(*(U8*)ST.maxpos))
- ST.maxpos--;
- }
- else if (do_utf8) {
- int m = ST.max - ST.min;
- for (ST.maxpos = locinput;
- m >0 && ST.maxpos + UTF8SKIP(ST.maxpos) <= PL_regeol; m--)
- ST.maxpos += UTF8SKIP(ST.maxpos);
- }
- else {
- ST.maxpos = locinput + ST.max - ST.min;
- if (ST.maxpos >= PL_regeol)
- ST.maxpos = PL_regeol - 1;
- }
- goto curly_try_B_min_known;
-
- }
- else {
- ST.count = regrepeat(rex, ST.A, ST.max, depth);
- locinput = PL_reginput;
- if (ST.count < ST.min)
- sayNO;
- if ((ST.count > ST.min)
- && (PL_regkind[OP(ST.B)] == EOL) && (OP(ST.B) != MEOL))
- {
- /* A{m,n} must come at the end of the string, there's
- * no point in backing off ... */
- ST.min = ST.count;
- /* ...except that $ and \Z can match before *and* after
- newline at the end. Consider "\n\n" =~ /\n+\Z\n/.
- We may back off by one in this case. */
- if (UCHARAT(PL_reginput - 1) == '\n' && OP(ST.B) != EOS)
- ST.min--;
- }
- REGCP_SET(ST.cp);
- goto curly_try_B_max;
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_known_fail:
- /* failed to find B in a non-greedy match where c1,c2 valid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- PL_reginput = locinput; /* Could be reset... */
- REGCP_UNWIND(ST.cp);
- /* Couldn't or didn't -- move forward. */
- ST.oldloc = locinput;
- if (do_utf8)
- locinput += UTF8SKIP(locinput);
- else
- locinput++;
- ST.count++;
- curly_try_B_min_known:
- /* find the next place where 'B' could work, then call B */
- {
- int n;
- if (do_utf8) {
- n = (ST.oldloc == locinput) ? 0 : 1;
- if (ST.c1 == ST.c2) {
- STRLEN len;
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos &&
- utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags) != (UV)ST.c1) {
- locinput += len;
- n++;
- }
- }
- else {
- /* set n to utf8_distance(oldloc, locinput) */
- while (locinput <= ST.maxpos) {
- STRLEN len;
- const UV c = utf8n_to_uvchr((U8*)locinput,
- UTF8_MAXBYTES, &len,
- uniflags);
- if (c == (UV)ST.c1 || c == (UV)ST.c2)
- break;
- locinput += len;
- n++;
- }
- }
- }
- else {
- if (ST.c1 == ST.c2) {
- while (locinput <= ST.maxpos &&
- UCHARAT(locinput) != ST.c1)
- locinput++;
- }
- else {
- while (locinput <= ST.maxpos
- && UCHARAT(locinput) != ST.c1
- && UCHARAT(locinput) != ST.c2)
- locinput++;
- }
- n = locinput - ST.oldloc;
- }
- if (locinput > ST.maxpos)
- sayNO;
- /* PL_reginput == oldloc now */
- if (n) {
- ST.count += n;
- if (regrepeat(rex, ST.A, n, depth) < n)
- sayNO;
- }
- PL_reginput = locinput;
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min_known, ST.B);
- }
- /* NOTREACHED */
-
-
- case CURLY_B_min_fail:
- /* failed to find B in a non-greedy match where c1,c2 invalid */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* failed -- move forward one */
- PL_reginput = locinput;
- if (regrepeat(rex, ST.A, 1, depth)) {
- ST.count++;
- locinput = PL_reginput;
- if (ST.count <= ST.max || (ST.max == REG_INFTY &&
- ST.count > 0)) /* count overflow ? */
- {
- curly_try_B_min:
- CURLY_SETPAREN(ST.paren, ST.count);
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- PUSH_STATE_GOTO(CURLY_B_min, ST.B);
- }
- }
- sayNO;
- /* NOTREACHED */
-
-
- curly_try_B_max:
- /* a successful greedy match: now try to match B */
- if (cur_eval && cur_eval->u.eval.close_paren &&
- cur_eval->u.eval.close_paren == (U32)ST.paren) {
- goto fake_end;
- }
- {
- UV c = 0;
- if (ST.c1 != CHRTEST_VOID)
- c = do_utf8 ? utf8n_to_uvchr((U8*)PL_reginput,
- UTF8_MAXBYTES, 0, uniflags)
- : (UV) UCHARAT(PL_reginput);
- /* If it could work, try it. */
- if (ST.c1 == CHRTEST_VOID || c == (UV)ST.c1 || c == (UV)ST.c2) {
- CURLY_SETPAREN(ST.paren, ST.count);
- PUSH_STATE_GOTO(CURLY_B_max, ST.B);
- /* NOTREACHED */
- }
- }
- /* FALL THROUGH */
- case CURLY_B_max_fail:
- /* failed to find B in a greedy match */
- if (ST.paren && ST.count)
- PL_regoffs[ST.paren].end = -1;
-
- REGCP_UNWIND(ST.cp);
- /* back up. */
- if (--ST.count < ST.min)
- sayNO;
- PL_reginput = locinput = HOPc(locinput, -1);
- goto curly_try_B_max;
-
-#undef ST
-
- case END:
- fake_end:
- if (cur_eval) {
- /* we've just finished A in /(??{A})B/; now continue with B */
- I32 tmpix;
- st->u.eval.toggle_reg_flags
- = cur_eval->u.eval.toggle_reg_flags;
- PL_reg_flags ^= st->u.eval.toggle_reg_flags;
-
- st->u.eval.prev_rex = rex_sv; /* inner */
- SETREX(rex_sv,cur_eval->u.eval.prev_rex);
- rex = (struct regexp *)SvANY(rex_sv);
- rexi = RXi_GET(rex);
- cur_curlyx = cur_eval->u.eval.prev_curlyx;
- ReREFCNT_inc(rex_sv);
- st->u.eval.cp = regcppush(0); /* Save *all* the positions. */
-
- /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */
- PL_reglastparen = &rex->lastparen;
- PL_reglastcloseparen = &rex->lastcloseparen;
-
- REGCP_SET(st->u.eval.lastcp);
- PL_reginput = locinput;
-
- /* Restore parens of the outer rex without popping the
- * savestack */
- tmpix = PL_savestack_ix;
- PL_savestack_ix = cur_eval->u.eval.lastcp;
- regcppop(rex);
- PL_savestack_ix = tmpix;
-
- st->u.eval.prev_eval = cur_eval;
- cur_eval = cur_eval->u.eval.prev_eval;
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log, "%*s EVAL trying tail ... %"UVxf"\n",
- REPORT_CODE_OFF+depth*2, "",PTR2UV(cur_eval)););
- if ( nochange_depth )
- nochange_depth--;
-
- PUSH_YES_STATE_GOTO(EVAL_AB,
- st->u.eval.prev_eval->u.eval.B); /* match B */
- }
-
- if (locinput < reginfo->till) {
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log,
- "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n",
- PL_colors[4],
- (long)(locinput - PL_reg_starttry),
- (long)(reginfo->till - PL_reg_starttry),
- PL_colors[5]));
-
- sayNO_SILENT; /* Cannot match: too short. */
- }
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
- case SUCCEED: /* successful SUSPEND/UNLESSM/IFMATCH/CURLYM */
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %ssubpattern success...%s\n",
- REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]));
- PL_reginput = locinput; /* put where regtry can find it */
- sayYES; /* Success! */
-
-#undef ST
-#define ST st->u.ifmatch
-
- case SUSPEND: /* (?>A) */
- ST.wanted = 1;
- PL_reginput = locinput;
- goto do_ifmatch;
-
- case UNLESSM: /* -ve lookaround: (?!A), or with flags, (?<!A) */
- ST.wanted = 0;
- goto ifmatch_trivial_fail_test;
-
- case IFMATCH: /* +ve lookaround: (?=A), or with flags, (?<=A) */
- ST.wanted = 1;
- ifmatch_trivial_fail_test:
- if (scan->flags) {
- char * const s = HOPBACKc(locinput, scan->flags);
- if (!s) {
- /* trivial fail */
- if (logical) {
- logical = 0;
- sw = 1 - (bool)ST.wanted;
- }
- else if (ST.wanted)
- sayNO;
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- }
- PL_reginput = s;
- }
- else
- PL_reginput = locinput;
-
- do_ifmatch:
- ST.me = scan;
- ST.logical = logical;
- logical = 0; /* XXX: reset state of logical once it has been saved into ST */
-
- /* execute body of (?...A) */
- PUSH_YES_STATE_GOTO(IFMATCH_A, NEXTOPER(NEXTOPER(scan)));
- /* NOTREACHED */
-
- case IFMATCH_A_fail: /* body of (?...A) failed */
- ST.wanted = !ST.wanted;
- /* FALL THROUGH */
-
- case IFMATCH_A: /* body of (?...A) succeeded */
- if (ST.logical) {
- sw = (bool)ST.wanted;
- }
- else if (!ST.wanted)
- sayNO;
-
- if (OP(ST.me) == SUSPEND)
- locinput = PL_reginput;
- else {
- locinput = PL_reginput = st->locinput;
- nextchr = UCHARAT(locinput);
- }
- scan = ST.me + ARG(ST.me);
- if (scan == ST.me)
- scan = NULL;
- continue; /* execute B */
-
-#undef ST
-
- case LONGJMP:
- next = scan + ARG(scan);
- if (next == scan)
- next = NULL;
- break;
- case COMMIT:
- reginfo->cutpoint = PL_regeol;
- /* FALLTHROUGH */
- case PRUNE:
- PL_reginput = locinput;
- if (!scan->flags)
- sv_yes_mark = sv_commit = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- PUSH_STATE_GOTO(COMMIT_next,next);
- /* NOTREACHED */
- case COMMIT_next_fail:
- no_final = 1;
- /* FALLTHROUGH */
- case OPFAIL:
- sayNO;
- /* NOTREACHED */
-
-#define ST st->u.mark
- case MARKPOINT:
- ST.prev_mark = mark_state;
- ST.mark_name = sv_commit = sv_yes_mark
- = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
- mark_state = st;
- ST.mark_loc = PL_reginput = locinput;
- PUSH_YES_STATE_GOTO(MARKPOINT_next,next);
- /* NOTREACHED */
- case MARKPOINT_next:
- mark_state = ST.prev_mark;
- sayYES;
- /* NOTREACHED */
- case MARKPOINT_next_fail:
- if (popmark && sv_eq(ST.mark_name,popmark))
- {
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- popmark = NULL; /* we found our mark */
- sv_commit = ST.mark_name;
-
- DEBUG_EXECUTE_r({
- PerlIO_printf(Perl_debug_log,
- "%*s %ssetting cutpoint to mark:%"SVf"...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], SVfARG(sv_commit), PL_colors[5]);
- });
- }
- mark_state = ST.prev_mark;
- sv_yes_mark = mark_state ?
- mark_state->u.mark.mark_name : NULL;
- sayNO;
- /* NOTREACHED */
- case SKIP:
- PL_reginput = locinput;
- if (scan->flags) {
- /* (*SKIP) : if we fail we cut here*/
- ST.mark_name = NULL;
- ST.mark_loc = locinput;
- PUSH_STATE_GOTO(SKIP_next,next);
- } else {
- /* (*SKIP:NAME) : if there is a (*MARK:NAME) fail where it was,
- otherwise do nothing. Meaning we need to scan
- */
- regmatch_state *cur = mark_state;
- SV *find = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]);
-
- while (cur) {
- if ( sv_eq( cur->u.mark.mark_name,
- find ) )
- {
- ST.mark_name = find;
- PUSH_STATE_GOTO( SKIP_next, next );
- }
- cur = cur->u.mark.prev_mark;
- }
- }
- /* Didn't find our (*MARK:NAME) so ignore this (*SKIP:NAME) */
- break;
- case SKIP_next_fail:
- if (ST.mark_name) {
- /* (*CUT:NAME) - Set up to search for the name as we
- collapse the stack*/
- popmark = ST.mark_name;
- } else {
- /* (*CUT) - No name, we cut here.*/
- if (ST.mark_loc > startpoint)
- reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1);
- /* but we set sv_commit to latest mark_name if there
- is one so they can test to see how things lead to this
- cut */
- if (mark_state)
- sv_commit=mark_state->u.mark.mark_name;
- }
- no_final = 1;
- sayNO;
- /* NOTREACHED */
-#undef ST
- case FOLDCHAR:
- n = ARG(scan);
- if ( n == (U32)what_len_TRICKYFOLD(locinput,do_utf8,ln) ) {
- locinput += ln;
- } else if ( 0xDF == n && !do_utf8 && !UTF ) {
- sayNO;
- } else {
- U8 folded[UTF8_MAXBYTES_CASE+1];
- STRLEN foldlen;
- const char * const l = locinput;
- char *e = PL_regeol;
- to_uni_fold(n, folded, &foldlen);
-
- if (ibcmp_utf8((const char*) folded, 0, foldlen, 1,
- l, &e, 0, do_utf8)) {
- sayNO;
- }
- locinput = e;
- }
- nextchr = UCHARAT(locinput);
- break;
- case LNBREAK:
- if ((n=is_LNBREAK(locinput,do_utf8))) {
- locinput += n;
- nextchr = UCHARAT(locinput);
- } else
- sayNO;
- break;
-
-#define CASE_CLASS(nAmE) \
- case nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- locinput += n; \
- nextchr = UCHARAT(locinput); \
- } else \
- sayNO; \
- break; \
- case N##nAmE: \
- if ((n=is_##nAmE(locinput,do_utf8))) { \
- sayNO; \
- } else { \
- locinput += UTF8SKIP(locinput); \
- nextchr = UCHARAT(locinput); \
- } \
- break
-
- CASE_CLASS(VERTWS);
- CASE_CLASS(HORIZWS);
-#undef CASE_CLASS
-
- default:
- PerlIO_printf(Perl_error_log, "%"UVxf" %d\n",
- PTR2UV(scan), OP(scan));
- Perl_croak(aTHX_ "regexp memory corruption");
-
- } /* end switch */
-
- /* switch break jumps here */
- scan = next; /* prepare to execute the next op and ... */
- continue; /* ... jump back to the top, reusing st */
- /* NOTREACHED */
-
- push_yes_state:
- /* push a state that backtracks on success */
- st->u.yes.prev_yes_state = yes_state;
- yes_state = st;
- /* FALL THROUGH */
- push_state:
- /* push a new regex state, then continue at scan */
- {
- regmatch_state *newst;
-
- DEBUG_STACK_r({
- regmatch_state *cur = st;
- regmatch_state *curyes = yes_state;
- int curd = depth;
- regmatch_slab *slab = PL_regmatch_slab;
- for (;curd > -1;cur--,curd--) {
- if (cur < SLAB_FIRST(slab)) {
- slab = slab->prev;
- cur = SLAB_LAST(slab);
- }
- PerlIO_printf(Perl_error_log, "%*s#%-3d %-10s %s\n",
- REPORT_CODE_OFF + 2 + depth * 2,"",
- curd, PL_reg_name[cur->resume_state],
- (curyes == cur) ? "yes" : ""
- );
- if (curyes == cur)
- curyes = cur->u.yes.prev_yes_state;
- }
- } else
- DEBUG_STATE_pp("push")
- );
- depth++;
- st->locinput = locinput;
- newst = st+1;
- if (newst > SLAB_LAST(PL_regmatch_slab))
- newst = S_push_slab(aTHX);
- PL_regmatch_state = newst;
-
- locinput = PL_reginput;
- nextchr = UCHARAT(locinput);
- st = newst;
- continue;
- /* NOTREACHED */
- }
- }
-
- /*
- * We get here only if there's trouble -- normally "case END" is
- * the terminating point.
- */
- Perl_croak(aTHX_ "corrupted regexp pointers");
- /*NOTREACHED*/
- sayNO;
-
-yes:
- if (yes_state) {
- /* we have successfully completed a subexpression, but we must now
- * pop to the state marked by yes_state and continue from there */
- assert(st != yes_state);
-#ifdef DEBUGGING
- while (st != yes_state) {
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- DEBUG_STATE_r({
- if (no_final) {
- DEBUG_STATE_pp("pop (no final)");
- } else {
- DEBUG_STATE_pp("pop (yes)");
- }
- });
- depth--;
- }
-#else
- while (yes_state < SLAB_FIRST(PL_regmatch_slab)
- || yes_state > SLAB_LAST(PL_regmatch_slab))
- {
- /* not in this slab, pop slab */
- depth -= (st - SLAB_FIRST(PL_regmatch_slab) + 1);
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- depth -= (st - yes_state);
-#endif
- st = yes_state;
- yes_state = st->u.yes.prev_yes_state;
- PL_regmatch_state = st;
-
- if (no_final) {
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
- }
- state_num = st->resume_state + no_final;
- goto reenter_switch;
- }
-
- DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n",
- PL_colors[4], PL_colors[5]));
-
- if (PL_reg_eval_set) {
- /* each successfully executed (?{...}) block does the equivalent of
- * local $^R = do {...}
- * When popping the save stack, all these locals would be undone;
- * bypass this by setting the outermost saved $^R to the latest
- * value */
- if (oreplsv != GvSV(PL_replgv))
- sv_setsv(oreplsv, GvSV(PL_replgv));
- }
- result = 1;
- goto final_exit;
-
-no:
- DEBUG_EXECUTE_r(
- PerlIO_printf(Perl_debug_log,
- "%*s %sfailed...%s\n",
- REPORT_CODE_OFF+depth*2, "",
- PL_colors[4], PL_colors[5])
- );
-
-no_silent:
- if (no_final) {
- if (yes_state) {
- goto yes;
- } else {
- goto final_exit;
- }
- }
- if (depth) {
- /* there's a previous state to backtrack to */
- st--;
- if (st < SLAB_FIRST(PL_regmatch_slab)) {
- PL_regmatch_slab = PL_regmatch_slab->prev;
- st = SLAB_LAST(PL_regmatch_slab);
- }
- PL_regmatch_state = st;
- locinput= st->locinput;
- nextchr = UCHARAT(locinput);
-
- DEBUG_STATE_pp("pop");
- depth--;
- if (yes_state == st)
- yes_state = st->u.yes.prev_yes_state;
-
- state_num = st->resume_state + 1; /* failure = success + 1 */
- goto reenter_switch;
- }
- result = 0;
-
- final_exit:
- if (rex->intflags & PREGf_VERBARG_SEEN) {
- SV *sv_err = get_sv("REGERROR", 1);
- SV *sv_mrk = get_sv("REGMARK", 1);
- if (result) {
- sv_commit = &PL_sv_no;
- if (!sv_yes_mark)
- sv_yes_mark = &PL_sv_yes;
- } else {
- if (!sv_commit)
- sv_commit = &PL_sv_yes;
- sv_yes_mark = &PL_sv_no;
- }
- sv_setsv(sv_err, sv_commit);
- sv_setsv(sv_mrk, sv_yes_mark);
- }
-
- /* clean up; in particular, free all slabs above current one */
- LEAVE_SCOPE(oldsave);
-
- return result;
-}
-
-/*
- - regrepeat - repeatedly match something simple, report how many
- */
-/*
- * [This routine now assumes that it will only match on things of length 1.
- * That was true before, but now we assume scan - reginput is the count,
- * rather than incrementing count on every character. [Er, except utf8.]]
- */
-STATIC I32
-S_regrepeat(pTHX_ const regexp *prog, const regnode *p, I32 max, int depth)
-{
- dVAR;
- register char *scan;
- register I32 c;
- register char *loceol = PL_regeol;
- register I32 hardcount = 0;
- register bool do_utf8 = PL_reg_match_utf8;
-#ifndef DEBUGGING
- PERL_UNUSED_ARG(depth);
-#endif
-
- PERL_ARGS_ASSERT_REGREPEAT;
-
- scan = PL_reginput;
- if (max == REG_INFTY)
- max = I32_MAX;
- else if (max < loceol - scan)
- loceol = scan + max;
- switch (OP(p)) {
- case REG_ANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max && *scan != '\n') {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && *scan != '\n')
- scan++;
- }
- break;
- case SANY:
- if (do_utf8) {
- loceol = PL_regeol;
- while (scan < loceol && hardcount < max) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- }
- else
- scan = loceol;
- break;
- case CANY:
- scan = loceol;
- break;
- case EXACT: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol && UCHARAT(scan) == c)
- scan++;
- break;
- case EXACTF: /* length of string is 1 */
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c]))
- scan++;
- break;
- case EXACTFL: /* length of string is 1 */
- PL_reg_flags |= RF_tainted;
- c = (U8)*STRING(p);
- while (scan < loceol &&
- (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c]))
- scan++;
- break;
- case ANYOF:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- reginclass(prog, p, (U8*)scan, 0, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && REGINCLASS(prog, p, (U8*)scan))
- scan++;
- }
- break;
- case ALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM(*scan))
- scan++;
- }
- break;
- case ALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isALNUM_LC(*scan))
- scan++;
- }
- break;
- case NALNUM:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_ALNUM();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM(*scan))
- scan++;
- }
- break;
- case NALNUML:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !isALNUM_LC_utf8((U8*)scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isALNUM_LC(*scan))
- scan++;
- }
- break;
- case SPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE(*scan))
- scan++;
- }
- break;
- case SPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isSPACE_LC(*scan))
- scan++;
- }
- break;
- case NSPACE:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_SPACE();
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' ||
- swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE(*scan))
- scan++;
- }
- break;
- case NSPACEL:
- PL_reg_flags |= RF_tainted;
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol &&
- !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isSPACE_LC(*scan))
- scan++;
- }
- break;
- case DIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && isDIGIT(*scan))
- scan++;
- }
- break;
- case NDIGIT:
- if (do_utf8) {
- loceol = PL_regeol;
- LOAD_UTF8_CHARCLASS_DIGIT();
- while (hardcount < max && scan < loceol &&
- !swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !isDIGIT(*scan))
- scan++;
- }
- case LNBREAK:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_LNBREAK_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- /*
- LNBREAK can match two latin chars, which is ok,
- because we have a null terminated string, but we
- have to use hardcount in this situation
- */
- while (scan < loceol && (c=is_LNBREAK_latin1(scan))) {
- scan+=c;
- hardcount++;
- }
- }
- break;
- case HORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_HORIZWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_HORIZWS_latin1(scan))
- scan++;
- }
- break;
- case NHORIZWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_HORIZWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_HORIZWS_latin1(scan))
- scan++;
-
- }
- break;
- case VERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && (c=is_VERTWS_utf8(scan))) {
- scan += c;
- hardcount++;
- }
- } else {
- while (scan < loceol && is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
- case NVERTWS:
- if (do_utf8) {
- loceol = PL_regeol;
- while (hardcount < max && scan < loceol && !is_VERTWS_utf8(scan)) {
- scan += UTF8SKIP(scan);
- hardcount++;
- }
- } else {
- while (scan < loceol && !is_VERTWS_latin1(scan))
- scan++;
-
- }
- break;
-
- default: /* Called on something of 0 width. */
- break; /* So match right here or not at all. */
- }
-
- if (hardcount)
- c = hardcount;
- else
- c = scan - PL_reginput;
- PL_reginput = scan;
-
- DEBUG_r({
- GET_RE_DEBUG_FLAGS_DECL;
- DEBUG_EXECUTE_r({
- SV * const prop = sv_newmortal();
- regprop(prog, prop, p);
- PerlIO_printf(Perl_debug_log,
- "%*s %s can match %"IVdf" times out of %"IVdf"...\n",
- REPORT_CODE_OFF + depth*2, "", SvPVX_const(prop),(IV)c,(IV)max);
- });
- });
-
- return(c);
-}
-
-
-#if !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION)
-/*
-- regclass_swash - prepare the utf8 swash
-*/
-
-SV *
-Perl_regclass_swash(pTHX_ const regexp *prog, register const regnode* node, bool doinit, SV** listsvp, SV **altsvp)
-{
- dVAR;
- SV *sw = NULL;
- SV *si = NULL;
- SV *alt = NULL;
- RXi_GET_DECL(prog,progi);
- const struct reg_data * const data = prog ? progi->data : NULL;
-
- PERL_ARGS_ASSERT_REGCLASS_SWASH;
-
- if (data && data->count) {
- const U32 n = ARG(node);
-
- if (data->what[n] == 's') {
- SV * const rv = MUTABLE_SV(data->data[n]);
- AV * const av = MUTABLE_AV(SvRV(rv));
- SV **const ary = AvARRAY(av);
- SV **a, **b;
-
- /* See the end of regcomp.c:S_regclass() for
- * documentation of these array elements. */
-
- si = *ary;
- a = SvROK(ary[1]) ? &ary[1] : NULL;
- b = SvTYPE(ary[2]) == SVt_PVAV ? &ary[2] : NULL;
-
- if (a)
- sw = *a;
- else if (si && doinit) {
- sw = swash_init("utf8", "", si, 1, 0);
- (void)av_store(av, 1, sw);
- }
- if (b)
- alt = *b;
- }
- }
-
- if (listsvp)
- *listsvp = si;
- if (altsvp)
- *altsvp = alt;
-
- return sw;
-}
-#endif
-
-/*
- - reginclass - determine if a character falls into a character class
-
- The n is the ANYOF regnode, the p is the target string, lenp
- is pointer to the maximum length of how far to go in the p
- (if the lenp is zero, UTF8SKIP(p) is used),
- do_utf8 tells whether the target string is in UTF-8.
-
- */
-
-STATIC bool
-S_reginclass(pTHX_ const regexp *prog, register const regnode *n, register const U8* p, STRLEN* lenp, register bool do_utf8)
-{
- dVAR;
- const char flags = ANYOF_FLAGS(n);
- bool match = FALSE;
- UV c = *p;
- STRLEN len = 0;
- STRLEN plen;
-
- PERL_ARGS_ASSERT_REGINCLASS;
-
- if (do_utf8 && !UTF8_IS_INVARIANT(c)) {
- c = utf8n_to_uvchr(p, UTF8_MAXBYTES, &len,
- (UTF8_ALLOW_DEFAULT & UTF8_ALLOW_ANYUV)
- | UTF8_ALLOW_FFFF | UTF8_CHECK_ONLY);
- /* see [perl #37836] for UTF8_ALLOW_ANYUV; [perl #38293] for
- * UTF8_ALLOW_FFFF */
- if (len == (STRLEN)-1)
- Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)");
- }
-
- plen = lenp ? *lenp : UNISKIP(NATIVE_TO_UNI(c));
- if (do_utf8 || (flags & ANYOF_UNICODE)) {
- if (lenp)
- *lenp = 0;
- if (do_utf8 && !ANYOF_RUNTIME(n)) {
- if (len != (STRLEN)-1 && c < 256 && ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- }
- if (!match && do_utf8 && (flags & ANYOF_UNICODE_ALL) && c >= 256)
- match = TRUE;
- if (!match) {
- AV *av;
- SV * const sw = regclass_swash(prog, n, TRUE, 0, (SV**)&av);
-
- if (sw) {
- U8 * utf8_p;
- if (do_utf8) {
- utf8_p = (U8 *) p;
- } else {
- STRLEN len = 1;
- utf8_p = bytes_to_utf8(p, &len);
- }
- if (swash_fetch(sw, utf8_p, 1))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- if (!match && lenp && av) {
- I32 i;
- for (i = 0; i <= av_len(av); i++) {
- SV* const sv = *av_fetch(av, i, FALSE);
- STRLEN len;
- const char * const s = SvPV_const(sv, len);
- if (len <= plen && memEQ(s, (char*)utf8_p, len)) {
- *lenp = len;
- match = TRUE;
- break;
- }
- }
- }
- if (!match) {
- U8 tmpbuf[UTF8_MAXBYTES_CASE+1];
-
- STRLEN tmplen;
- to_utf8_fold(utf8_p, tmpbuf, &tmplen);
- if (swash_fetch(sw, tmpbuf, 1))
- match = TRUE;
- }
- }
-
- /* If we allocated a string above, free it */
- if (! do_utf8) Safefree(utf8_p);
- }
- }
- if (match && lenp && *lenp == 0)
- *lenp = UNISKIP(NATIVE_TO_UNI(c));
- }
- if (!match && c < 256) {
- if (ANYOF_BITMAP_TEST(n, c))
- match = TRUE;
- else if (flags & ANYOF_FOLD) {
- U8 f;
-
- if (flags & ANYOF_LOCALE) {
- PL_reg_flags |= RF_tainted;
- f = PL_fold_locale[c];
- }
- else
- f = PL_fold[c];
- if (f != c && ANYOF_BITMAP_TEST(n, f))
- match = TRUE;
- }
-
- if (!match && (flags & ANYOF_CLASS)) {
- PL_reg_flags |= RF_tainted;
- if (
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK(c)) ||
- (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK(c))
- ) /* How's that for a conditional? */
- {
- match = TRUE;
- }
- }
- }
-
- return (flags & ANYOF_INVERT) ? !match : match;
-}
-
-STATIC U8 *
-S_reghop3(U8 *s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-
-#ifdef XXX_dmq
-/* there are a bunch of places where we use two reghop3's that should
- be replaced with this routine. but since thats not done yet
- we ifdef it out - dmq
-*/
-STATIC U8 *
-S_reghop4(U8 *s, I32 off, const U8* llim, const U8* rlim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOP4;
-
- if (off >= 0) {
- while (off-- && s < rlim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- }
- else {
- while (off++ && s > llim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > llim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- }
- return s;
-}
-#endif
-
-STATIC U8 *
-S_reghopmaybe3(U8* s, I32 off, const U8* lim)
-{
- dVAR;
-
- PERL_ARGS_ASSERT_REGHOPMAYBE3;
-
- if (off >= 0) {
- while (off-- && s < lim) {
- /* XXX could check well-formedness here */
- s += UTF8SKIP(s);
- }
- if (off >= 0)
- return NULL;
- }
- else {
- while (off++ && s > lim) {
- s--;
- if (UTF8_IS_CONTINUED(*s)) {
- while (s > lim && UTF8_IS_CONTINUATION(*s))
- s--;
- }
- /* XXX could check well-formedness here */
- }
- if (off <= 0)
- return NULL;
- }
- return s;
-}
-
-static void
-restore_pos(pTHX_ void *arg)
-{
- dVAR;
- regexp * const rex = (regexp *)arg;
- if (PL_reg_eval_set) {
- if (PL_reg_oldsaved) {
- rex->subbeg = PL_reg_oldsaved;
- rex->sublen = PL_reg_oldsavedlen;
-#ifdef PERL_OLD_COPY_ON_WRITE
- rex->saved_copy = PL_nrs;
-#endif
- RXp_MATCH_COPIED_on(rex);
- }
- PL_reg_magic->mg_len = PL_reg_oldpos;
- PL_reg_eval_set = 0;
- PL_curpm = PL_reg_oldcurpm;
- }
-}
-
-STATIC void
-S_to_utf8_substr(pTHX_ register regexp *prog)
-{
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_UTF8_SUBSTR;
-
- do {
- if (prog->substrs->data[i].substr
- && !prog->substrs->data[i].utf8_substr) {
- SV* const sv = newSVsv(prog->substrs->data[i].substr);
- prog->substrs->data[i].utf8_substr = sv;
- sv_utf8_upgrade(sv);
- if (SvVALID(prog->substrs->data[i].substr)) {
- const U8 flags = BmFLAGS(prog->substrs->data[i].substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- /* Whilst this makes the SV technically "invalid" (as its
- buffer is no longer followed by "\0") when fbm_compile()
- adds the "\n" back, a "\0" is restored. */
- }
- fbm_compile(sv, flags);
- }
- if (prog->substrs->data[i].substr == prog->check_substr)
- prog->check_utf8 = sv;
- }
- } while (i--);
-}
-
-STATIC void
-S_to_byte_substr(pTHX_ register regexp *prog)
-{
- dVAR;
- int i = 1;
-
- PERL_ARGS_ASSERT_TO_BYTE_SUBSTR;
-
- do {
- if (prog->substrs->data[i].utf8_substr
- && !prog->substrs->data[i].substr) {
- SV* sv = newSVsv(prog->substrs->data[i].utf8_substr);
- if (sv_utf8_downgrade(sv, TRUE)) {
- if (SvVALID(prog->substrs->data[i].utf8_substr)) {
- const U8 flags
- = BmFLAGS(prog->substrs->data[i].utf8_substr);
- if (flags & FBMcf_TAIL) {
- /* Trim the trailing \n that fbm_compile added last
- time. */
- SvCUR_set(sv, SvCUR(sv) - 1);
- }
- fbm_compile(sv, flags);
- }
- } else {
- SvREFCNT_dec(sv);
- sv = &PL_sv_undef;
- }
- prog->substrs->data[i].substr = sv;
- if (prog->substrs->data[i].utf8_substr == prog->check_utf8)
- prog->check_substr = sv;
- }
- } while (i--);
-}
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
projects / perl / modules / re-engine-Hooks.git / commitdiff