+++ /dev/null
-/* dquote_static.c
- *
- * This file contains static functions that are related to
- * parsing double-quotish expressions, but are used in more than
- * one file.
- *
- * It is currently #included by regcomp.c and toke.c.
-*/
-
-#define PERL_IN_DQUOTE_STATIC_C
-#include "embed.h"
-
-/*
- - regcurly - a little FSA that accepts {\d+,?\d*}
- Pulled from regcomp.c.
- */
-PERL_STATIC_INLINE I32
-S_regcurly(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++;
- }
-
- return *s == '}';
-}
-
-/* XXX Add documentation after final interface and behavior is decided */
-/* May want to show context for error, so would pass Perl_bslash_c(pTHX_ const char* current, const char* start, const bool output_warning)
- U8 source = *current;
-*/
-
-STATIC char
-S_grok_bslash_c(pTHX_ const char source, const bool output_warning)
-{
-
- U8 result;
-
- if (! isPRINT_A(source)) {
- Perl_croak(aTHX_ "%s",
- "Character following \"\\c\" must be printable ASCII");
- }
- else if (source == '{') {
- assert(isPRINT_A(toCTRL('{')));
-
- /* diag_listed_as: Use "%s" instead of "%s" */
- Perl_croak(aTHX_ "Use \"%c\" instead of \"\\c{\"", toCTRL('{'));
- }
-
- result = toCTRL(source);
- if (output_warning && isPRINT_A(result)) {
- U8 clearer[3];
- U8 i = 0;
- if (! isWORDCHAR(result)) {
- clearer[i++] = '\\';
- }
- clearer[i++] = result;
- clearer[i++] = '\0';
-
- Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX),
- "\"\\c%c\" is more clearly written simply as \"%s\"",
- source,
- clearer);
- }
-
- return result;
-}
-
-STATIC bool
-S_grok_bslash_o(pTHX_ char **s, UV *uv, const char** error_msg,
- const bool output_warning, const bool strict,
- const bool silence_non_portable,
- const bool UTF)
-{
-
-/* Documentation to be supplied when interface nailed down finally
- * This returns FALSE if there is an error which the caller need not recover
- * from; , otherwise TRUE. In either case the caller should look at *len
- * On input:
- * s is the address of a pointer to a NULL terminated string that begins
- * with 'o', and the previous character was a backslash. At exit, *s
- * will be advanced to the byte just after those absorbed by this
- * function. Hence the caller can continue parsing from there. In
- * the case of an error, this routine has generally positioned *s to
- * point just to the right of the first bad spot, so that a message
- * that has a "<--" to mark the spot will be correctly positioned.
- * uv points to a UV that will hold the output value, valid only if the
- * return from the function is TRUE
- * error_msg is a pointer that will be set to an internal buffer giving an
- * error message upon failure (the return is FALSE). Untouched if
- * function succeeds
- * output_warning says whether to output any warning messages, or suppress
- * them
- * strict is true if this should fail instead of warn if there are
- * non-octal digits within the braces
- * silence_non_portable is true if to suppress warnings about the code
- * point returned being too large to fit on all platforms.
- * UTF is true iff the string *s is encoded in UTF-8.
- */
- char* e;
- STRLEN numbers_len;
- I32 flags = PERL_SCAN_ALLOW_UNDERSCORES
- | PERL_SCAN_DISALLOW_PREFIX
- /* XXX Until the message is improved in grok_oct, handle errors
- * ourselves */
- | PERL_SCAN_SILENT_ILLDIGIT;
-
- PERL_ARGS_ASSERT_GROK_BSLASH_O;
-
-
- assert(**s == 'o');
- (*s)++;
-
- if (**s != '{') {
- *error_msg = "Missing braces on \\o{}";
- return FALSE;
- }
-
- e = strchr(*s, '}');
- if (!e) {
- (*s)++; /* Move past the '{' */
- while (isOCTAL(**s)) { /* Position beyond the legal digits */
- (*s)++;
- }
- *error_msg = "Missing right brace on \\o{";
- return FALSE;
- }
-
- (*s)++; /* Point to expected first digit (could be first byte of utf8
- sequence if not a digit) */
- numbers_len = e - *s;
- if (numbers_len == 0) {
- (*s)++; /* Move past the } */
- *error_msg = "Number with no digits";
- return FALSE;
- }
-
- if (silence_non_portable) {
- flags |= PERL_SCAN_SILENT_NON_PORTABLE;
- }
-
- *uv = grok_oct(*s, &numbers_len, &flags, NULL);
- /* Note that if has non-octal, will ignore everything starting with that up
- * to the '}' */
-
- if (numbers_len != (STRLEN) (e - *s)) {
- if (strict) {
- *s += numbers_len;
- *s += (UTF) ? UTF8SKIP(*s) : (STRLEN) 1;
- *error_msg = "Non-octal character";
- return FALSE;
- }
- else if (output_warning) {
- Perl_ck_warner(aTHX_ packWARN(WARN_DIGIT),
- /* diag_listed_as: Non-octal character '%c'. Resolved as "%s" */
- "Non-octal character '%c'. Resolved as \"\\o{%.*s}\"",
- *(*s + numbers_len),
- (int) numbers_len,
- *s);
- }
- }
-
- /* Return past the '}' */
- *s = e + 1;
-
- return TRUE;
-}
-
-PERL_STATIC_INLINE bool
-S_grok_bslash_x(pTHX_ char **s, UV *uv, const char** error_msg,
- const bool output_warning, const bool strict,
- const bool silence_non_portable,
- const bool UTF)
-{
-
-/* Documentation to be supplied when interface nailed down finally
- * This returns FALSE if there is an error which the caller need not recover
- * from; , otherwise TRUE. In either case the caller should look at *len
- * On input:
- * s is the address of a pointer to a NULL terminated string that begins
- * with 'x', and the previous character was a backslash. At exit, *s
- * will be advanced to the byte just after those absorbed by this
- * function. Hence the caller can continue parsing from there. In
- * the case of an error, this routine has generally positioned *s to
- * point just to the right of the first bad spot, so that a message
- * that has a "<--" to mark the spot will be correctly positioned.
- * uv points to a UV that will hold the output value, valid only if the
- * return from the function is TRUE
- * error_msg is a pointer that will be set to an internal buffer giving an
- * error message upon failure (the return is FALSE). Untouched if
- * function succeeds
- * output_warning says whether to output any warning messages, or suppress
- * them
- * strict is true if anything out of the ordinary should cause this to
- * fail instead of warn or be silent. For example, it requires
- * exactly 2 digits following the \x (when there are no braces).
- * 3 digits could be a mistake, so is forbidden in this mode.
- * silence_non_portable is true if to suppress warnings about the code
- * point returned being too large to fit on all platforms.
- * UTF is true iff the string *s is encoded in UTF-8.
- */
- char* e;
- STRLEN numbers_len;
- I32 flags = PERL_SCAN_DISALLOW_PREFIX;
-
- PERL_ARGS_ASSERT_GROK_BSLASH_X;
-
- PERL_UNUSED_ARG(output_warning);
-
- assert(**s == 'x');
- (*s)++;
-
- if (strict) {
- flags |= PERL_SCAN_SILENT_ILLDIGIT;
- }
-
- if (**s != '{') {
- STRLEN len = (strict) ? 3 : 2;
-
- *uv = grok_hex(*s, &len, &flags, NULL);
- *s += len;
- if (strict && len != 2) {
- if (len < 2) {
- *s += (UTF) ? UTF8SKIP(*s) : 1;
- *error_msg = "Non-hex character";
- }
- else {
- *error_msg = "Use \\x{...} for more than two hex characters";
- }
- return FALSE;
- }
- return TRUE;
- }
-
- e = strchr(*s, '}');
- if (!e) {
- (*s)++; /* Move past the '{' */
- while (isXDIGIT(**s)) { /* Position beyond the legal digits */
- (*s)++;
- }
- /* XXX The corresponding message above for \o is just '\\o{'; other
- * messages for other constructs include the '}', so are inconsistent.
- */
- *error_msg = "Missing right brace on \\x{}";
- return FALSE;
- }
-
- (*s)++; /* Point to expected first digit (could be first byte of utf8
- sequence if not a digit) */
- numbers_len = e - *s;
- if (numbers_len == 0) {
- if (strict) {
- (*s)++; /* Move past the } */
- *error_msg = "Number with no digits";
- return FALSE;
- }
- return TRUE;
- }
-
- flags |= PERL_SCAN_ALLOW_UNDERSCORES;
- if (silence_non_portable) {
- flags |= PERL_SCAN_SILENT_NON_PORTABLE;
- }
-
- *uv = grok_hex(*s, &numbers_len, &flags, NULL);
- /* Note that if has non-hex, will ignore everything starting with that up
- * to the '}' */
-
- if (strict && numbers_len != (STRLEN) (e - *s)) {
- *s += numbers_len;
- *s += (UTF) ? UTF8SKIP(*s) : 1;
- *error_msg = "Non-hex character";
- return FALSE;
- }
-
- /* Return past the '}' */
- *s = e + 1;
-
- return TRUE;
-}
-
-STATIC char*
-S_form_short_octal_warning(pTHX_
- const char * const s, /* Points to first non-octal */
- const STRLEN len /* Length of octals string, so
- (s-len) points to first
- octal */
-) {
- /* Return a character string consisting of a warning message for when a
- * string constant in octal is weird, like "\078". */
-
- const char * sans_leading_zeros = s - len;
-
- PERL_ARGS_ASSERT_FORM_SHORT_OCTAL_WARNING;
-
- assert(*s == '8' || *s == '9');
-
- /* Remove the leading zeros, retaining one zero so won't be zero length */
- while (*sans_leading_zeros == '0') sans_leading_zeros++;
- if (sans_leading_zeros == s) {
- sans_leading_zeros--;
- }
-
- return Perl_form(aTHX_
- "'%.*s' resolved to '\\o{%.*s}%c'",
- (int) (len + 2), s - len - 1,
- (int) (s - sans_leading_zeros), sans_leading_zeros,
- *s);
-}
-
-/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: nil
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 et:
- */
projects / perl / modules / re-engine-Hooks.git / blobdiff