X-Git-Url: http://git.vpit.fr/?p=perl%2Fmodules%2Fre-engine-Hooks.git;a=blobdiff_plain;f=src%2F5023001%2Forig%2Fdquote_static.c;fp=src%2F5023001%2Forig%2Fdquote_static.c;h=885ba06ffb630405b467c0be280195564bf8ef68;hp=0000000000000000000000000000000000000000;hb=4e256c771a17a4f8f3e7c6e352ab133b106b92f4;hpb=db28a7ef5e55803a8c143a0ff4ddd9aca56438d7 diff --git a/src/5023001/orig/dquote_static.c b/src/5023001/orig/dquote_static.c new file mode 100644 index 0000000..885ba06 --- /dev/null +++ b/src/5023001/orig/dquote_static.c @@ -0,0 +1,348 @@ +/* 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 == '{') { + const char control = toCTRL('{'); + if (isPRINT_A(control)) { + /* diag_listed_as: Use "%s" instead of "%s" */ + Perl_croak(aTHX_ "Use \"%c\" instead of \"\\c{\"", control); + } + else { + Perl_croak(aTHX_ "Sequence \"\\c{\" invalid"); + } + } + + 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 [???]. + * It guarantees that the returned codepoint, *uv, when expressed as + * utf8 bytes, would fit within the skipped "\o{...}" bytes. + * 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; + +#ifdef DEBUGGING + char *start = *s - 1; + assert(*start == '\\'); +#endif + + 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; + + /* guarantee replacing "\o{...}" with utf8 bytes fits within + * existing space */ + assert(OFFUNISKIP(*uv) < *s - start); + + 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. + * It guarantees that the returned codepoint, *uv, when expressed as + * utf8 bytes, would fit within the skipped "\x{...}" bytes. + * + * 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; +#ifdef DEBUGGING + char *start = *s - 1; + assert(*start == '\\'); +#endif + + PERL_ARGS_ASSERT_GROK_BSLASH_X; + + assert(**s == 'x'); + (*s)++; + + if (strict || ! output_warning) { + 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; + } + goto ok; + } + + 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; + } + *s = e + 1; + *uv = 0; + goto ok; + } + + 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; + + ok: + /* guarantee replacing "\x{...}" with utf8 bytes fits within + * existing space */ + assert(OFFUNISKIP(*uv) < *s - start); + 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); +} + +/* + * ex: set ts=8 sts=4 sw=4 et: + */