5 * "A fair jaw-cracker dwarf-language must be." --Samwise Gamgee
8 /* NOTE: this is derived from Henry Spencer's regexp code, and should not
9 * confused with the original package (see point 3 below). Thanks, Henry!
12 /* Additional note: this code is very heavily munged from Henry's version
13 * in places. In some spots I've traded clarity for efficiency, so don't
14 * blame Henry for some of the lack of readability.
17 /* The names of the functions have been changed from regcomp and
18 * regexec to pregcomp and pregexec in order to avoid conflicts
19 * with the POSIX routines of the same names.
22 #ifdef PERL_EXT_RE_BUILD
23 /* need to replace pregcomp et al, so enable that */
24 # ifndef PERL_IN_XSUB_RE
25 # define PERL_IN_XSUB_RE
27 /* need access to debugger hooks */
28 # if defined(PERL_EXT_RE_DEBUG) && !defined(DEBUGGING)
33 #ifdef PERL_IN_XSUB_RE
34 /* We *really* need to overwrite these symbols: */
35 # define Perl_pregcomp my_regcomp
36 # define Perl_regdump my_regdump
37 # define Perl_regprop my_regprop
38 # define Perl_pregfree my_regfree
39 # define Perl_re_intuit_string my_re_intuit_string
40 /* *These* symbols are masked to allow static link. */
41 # define Perl_regnext my_regnext
42 # define Perl_save_re_context my_save_re_context
43 # define Perl_reginitcolors my_reginitcolors
45 # define PERL_NO_GET_CONTEXT
50 * pregcomp and pregexec -- regsub and regerror are not used in perl
52 * Copyright (c) 1986 by University of Toronto.
53 * Written by Henry Spencer. Not derived from licensed software.
55 * Permission is granted to anyone to use this software for any
56 * purpose on any computer system, and to redistribute it freely,
57 * subject to the following restrictions:
59 * 1. The author is not responsible for the consequences of use of
60 * this software, no matter how awful, even if they arise
63 * 2. The origin of this software must not be misrepresented, either
64 * by explicit claim or by omission.
66 * 3. Altered versions must be plainly marked as such, and must not
67 * be misrepresented as being the original software.
70 **** Alterations to Henry's code are...
72 **** Copyright (c) 1991-2001, Larry Wall
74 **** You may distribute under the terms of either the GNU General Public
75 **** License or the Artistic License, as specified in the README file.
78 * Beware that some of this code is subtly aware of the way operator
79 * precedence is structured in regular expressions. Serious changes in
80 * regular-expression syntax might require a total rethink.
83 #define PERL_IN_REGCOMP_C
86 #ifdef PERL_IN_XSUB_RE
87 # if defined(PERL_CAPI) || defined(PERL_OBJECT)
102 # if defined(BUGGY_MSC6)
103 /* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */
104 # pragma optimize("a",off)
105 /* But MSC 6.00A is happy with 'w', for aliases only across function calls*/
106 # pragma optimize("w",on )
107 # endif /* BUGGY_MSC6 */
111 #define STATIC static
114 typedef struct RExC_state_t {
115 U16 flags16; /* are we folding, multilining? */
116 char *precomp; /* uncompiled string. */
118 char *start; /* Start of input for compile */
119 char *end; /* End of input for compile */
120 char *parse; /* Input-scan pointer. */
121 I32 whilem_seen; /* number of WHILEM in this expr */
122 regnode *emit_start; /* Start of emitted-code area */
123 regnode *emit; /* Code-emit pointer; ®dummy = don't = compiling */
124 I32 naughty; /* How bad is this pattern? */
125 I32 sawback; /* Did we see \1, ...? */
127 I32 size; /* Code size. */
128 I32 npar; /* () count. */
134 char *starttry; /* -Dr: where regtry was called. */
135 #define RExC_starttry (pRExC_state->starttry)
139 #define RExC_flags16 (pRExC_state->flags16)
140 #define RExC_precomp (pRExC_state->precomp)
141 #define RExC_rx (pRExC_state->rx)
142 #define RExC_start (pRExC_state->start)
143 #define RExC_end (pRExC_state->end)
144 #define RExC_parse (pRExC_state->parse)
145 #define RExC_whilem_seen (pRExC_state->whilem_seen)
146 #define RExC_offsets (pRExC_state->rx->offsets) /* I am not like the others */
147 #define RExC_emit (pRExC_state->emit)
148 #define RExC_emit_start (pRExC_state->emit_start)
149 #define RExC_naughty (pRExC_state->naughty)
150 #define RExC_sawback (pRExC_state->sawback)
151 #define RExC_seen (pRExC_state->seen)
152 #define RExC_size (pRExC_state->size)
153 #define RExC_npar (pRExC_state->npar)
154 #define RExC_extralen (pRExC_state->extralen)
155 #define RExC_seen_zerolen (pRExC_state->seen_zerolen)
156 #define RExC_seen_evals (pRExC_state->seen_evals)
157 #define RExC_utf8 (pRExC_state->utf8)
159 #define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?')
160 #define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \
161 ((*s) == '{' && regcurly(s)))
164 #undef SPSTART /* dratted cpp namespace... */
167 * Flags to be passed up and down.
169 #define WORST 0 /* Worst case. */
170 #define HASWIDTH 0x1 /* Known to match non-null strings. */
171 #define SIMPLE 0x2 /* Simple enough to be STAR/PLUS operand. */
172 #define SPSTART 0x4 /* Starts with * or +. */
173 #define TRYAGAIN 0x8 /* Weeded out a declaration. */
175 /* Length of a variant. */
177 typedef struct scan_data_t {
183 I32 last_end; /* min value, <0 unless valid. */
186 SV **longest; /* Either &l_fixed, or &l_float. */
190 I32 offset_float_min;
191 I32 offset_float_max;
195 struct regnode_charclass_class *start_class;
199 * Forward declarations for pregcomp()'s friends.
202 static scan_data_t zero_scan_data = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
205 #define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL)
206 #define SF_BEFORE_SEOL 0x1
207 #define SF_BEFORE_MEOL 0x2
208 #define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL)
209 #define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL)
212 # define SF_FIX_SHIFT_EOL (0+2)
213 # define SF_FL_SHIFT_EOL (0+4)
215 # define SF_FIX_SHIFT_EOL (+2)
216 # define SF_FL_SHIFT_EOL (+4)
219 #define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL)
220 #define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL)
222 #define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL)
223 #define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */
224 #define SF_IS_INF 0x40
225 #define SF_HAS_PAR 0x80
226 #define SF_IN_PAR 0x100
227 #define SF_HAS_EVAL 0x200
228 #define SCF_DO_SUBSTR 0x400
229 #define SCF_DO_STCLASS_AND 0x0800
230 #define SCF_DO_STCLASS_OR 0x1000
231 #define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR)
232 #define SCF_WHILEM_VISITED_POS 0x2000
234 #define UTF RExC_utf8
235 #define LOC (RExC_flags16 & PMf_LOCALE)
236 #define FOLD (RExC_flags16 & PMf_FOLD)
238 #define OOB_UNICODE 12345678
239 #define OOB_NAMEDCLASS -1
241 #define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv))
242 #define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b)
245 /* length of regex to show in messages that don't mark a position within */
246 #define RegexLengthToShowInErrorMessages 127
249 * If MARKER[12] are adjusted, be sure to adjust the constants at the top
250 * of t/op/regmesg.t, the tests in t/op/re_tests, and those in
251 * op/pragma/warn/regcomp.
253 #define MARKER1 "<-- HERE" /* marker as it appears in the description */
254 #define MARKER2 " <-- HERE " /* marker as it appears within the regex */
256 #define REPORT_LOCATION " in regex; marked by " MARKER1 " in m/%.*s" MARKER2 "%s/"
259 * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given
260 * arg. Show regex, up to a maximum length. If it's too long, chop and add
265 char *ellipses = ""; \
266 unsigned len = strlen(RExC_precomp); \
269 SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \
271 if (len > RegexLengthToShowInErrorMessages) { \
272 /* chop 10 shorter than the max, to ensure meaning of "..." */ \
273 len = RegexLengthToShowInErrorMessages - 10; \
276 Perl_croak(aTHX_ "%s in regex m/%.*s%s/", \
277 msg, (int)len, RExC_precomp, ellipses); \
281 * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given
282 * args. Show regex, up to a maximum length. If it's too long, chop and add
285 #define FAIL2(pat,msg) \
287 char *ellipses = ""; \
288 unsigned len = strlen(RExC_precomp); \
291 SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \
293 if (len > RegexLengthToShowInErrorMessages) { \
294 /* chop 10 shorter than the max, to ensure meaning of "..." */ \
295 len = RegexLengthToShowInErrorMessages - 10; \
298 S_re_croak2(aTHX_ pat, " in regex m/%.*s%s/", \
299 msg, (int)len, RExC_precomp, ellipses); \
304 * Simple_vFAIL -- like FAIL, but marks the current location in the scan
306 #define Simple_vFAIL(m) \
308 unsigned offset = strlen(RExC_precomp)-(RExC_end-RExC_parse); \
310 Perl_croak(aTHX_ "%s" REPORT_LOCATION, \
311 m, (int)offset, RExC_precomp, RExC_precomp + offset); \
315 * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL()
320 SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \
325 * Like Simple_vFAIL(), but accepts two arguments.
327 #define Simple_vFAIL2(m,a1) \
329 unsigned offset = strlen(RExC_precomp)-(RExC_end-RExC_parse); \
331 S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, \
332 (int)offset, RExC_precomp, RExC_precomp + offset); \
336 * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2().
338 #define vFAIL2(m,a1) \
341 SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \
342 Simple_vFAIL2(m, a1); \
347 * Like Simple_vFAIL(), but accepts three arguments.
349 #define Simple_vFAIL3(m, a1, a2) \
351 unsigned offset = strlen(RExC_precomp)-(RExC_end-RExC_parse); \
353 S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, \
354 (int)offset, RExC_precomp, RExC_precomp + offset); \
358 * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3().
360 #define vFAIL3(m,a1,a2) \
363 SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \
364 Simple_vFAIL3(m, a1, a2); \
368 * Like Simple_vFAIL(), but accepts four arguments.
370 #define Simple_vFAIL4(m, a1, a2, a3) \
372 unsigned offset = strlen(RExC_precomp)-(RExC_end-RExC_parse); \
374 S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3,\
375 (int)offset, RExC_precomp, RExC_precomp + offset); \
379 * Like Simple_vFAIL(), but accepts five arguments.
381 #define Simple_vFAIL5(m, a1, a2, a3, a4) \
383 unsigned offset = strlen(RExC_precomp)-(RExC_end-RExC_parse); \
384 S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3, a4,\
385 (int)offset, RExC_precomp, RExC_precomp + offset); \
389 #define vWARN(loc,m) \
391 unsigned offset = strlen(RExC_precomp)-(RExC_end-(loc)); \
392 Perl_warner(aTHX_ WARN_REGEXP, "%s" REPORT_LOCATION,\
393 m, (int)offset, RExC_precomp, RExC_precomp + offset); \
396 #define vWARNdep(loc,m) \
398 unsigned offset = strlen(RExC_precomp)-(RExC_end-(loc)); \
399 int warn_cat = ckWARN(WARN_REGEXP) ? WARN_REGEXP : WARN_DEPRECATED; \
400 Perl_warner(aTHX_ warn_cat, "%s" REPORT_LOCATION,\
401 m, (int)offset, RExC_precomp, RExC_precomp + offset); \
405 #define vWARN2(loc, m, a1) \
407 unsigned offset = strlen(RExC_precomp)-(RExC_end-(loc)); \
408 Perl_warner(aTHX_ WARN_REGEXP, m REPORT_LOCATION,\
410 (int)offset, RExC_precomp, RExC_precomp + offset); \
413 #define vWARN3(loc, m, a1, a2) \
415 unsigned offset = strlen(RExC_precomp) - (RExC_end - (loc)); \
416 Perl_warner(aTHX_ WARN_REGEXP, m REPORT_LOCATION, \
418 (int)offset, RExC_precomp, RExC_precomp + offset); \
421 #define vWARN4(loc, m, a1, a2, a3) \
423 unsigned offset = strlen(RExC_precomp)-(RExC_end-(loc)); \
424 Perl_warner(aTHX_ WARN_REGEXP, m REPORT_LOCATION,\
426 (int)offset, RExC_precomp, RExC_precomp + offset); \
429 /* used for the parse_flags section for (?c) -- japhy */
430 #define vWARN5(loc, m, a1, a2, a3, a4) \
432 unsigned offset = strlen(RExC_precomp)-(RExC_end-(loc)); \
433 Perl_warner(aTHX_ WARN_REGEXP, m REPORT_LOCATION, \
435 (int)offset, RExC_precomp, RExC_precomp + offset); \
439 /* Allow for side effects in s */
440 #define REGC(c,s) STMT_START { if (!SIZE_ONLY) *(s) = (c); else (void)(s);} STMT_END
442 /* Macros for recording node offsets. 20001227 mjd@plover.com
443 * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in
444 * element 2*n-1 of the array. Element #2n holds the byte length node #n.
445 * Element 0 holds the number n.
448 #define MJD_OFFSET_DEBUG(x)
449 /* #define MJD_OFFSET_DEBUG(x) fprintf x */
452 # define Set_Node_Offset_To_R(node,byte) \
456 Perl_croak(aTHX_ "value of node is %d in Offset macro", node); \
458 RExC_offsets[2*(node)-1] = (byte); \
463 # define Set_Node_Offset(node,byte) Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start)
464 # define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse)
466 # define Set_Node_Length_To_R(node,len) \
469 MJD_OFFSET_DEBUG((stderr, "** (%d) size of node %d is %d.\n", __LINE__, (node), (len))); \
471 Perl_croak(aTHX_ "value of node is %d in Length macro", node); \
473 RExC_offsets[2*(node)] = (len); \
478 # define Set_Node_Length(node,len) Set_Node_Length_To_R((node)-RExC_emit_start, len)
479 # define Set_Cur_Node_Length(len) Set_Node_Length(RExC_emit, len)
480 # define Set_Node_Cur_Length(node) Set_Node_Length(node, RExC_parse - parse_start)
482 /* Get offsets and lengths */
483 #define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1])
484 #define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)])
486 static void clear_re(pTHXo_ void *r);
488 /* Mark that we cannot extend a found fixed substring at this point.
489 Updata the longest found anchored substring and the longest found
490 floating substrings if needed. */
493 S_scan_commit(pTHX_ RExC_state_t *pRExC_state, scan_data_t *data)
495 STRLEN l = CHR_SVLEN(data->last_found);
496 STRLEN old_l = CHR_SVLEN(*data->longest);
498 if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) {
499 sv_setsv(*data->longest, data->last_found);
500 if (*data->longest == data->longest_fixed) {
501 data->offset_fixed = l ? data->last_start_min : data->pos_min;
502 if (data->flags & SF_BEFORE_EOL)
504 |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL);
506 data->flags &= ~SF_FIX_BEFORE_EOL;
509 data->offset_float_min = l ? data->last_start_min : data->pos_min;
510 data->offset_float_max = (l
511 ? data->last_start_max
512 : data->pos_min + data->pos_delta);
513 if (data->flags & SF_BEFORE_EOL)
515 |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL);
517 data->flags &= ~SF_FL_BEFORE_EOL;
520 SvCUR_set(data->last_found, 0);
522 data->flags &= ~SF_BEFORE_EOL;
525 /* Can match anything (initialization) */
527 S_cl_anything(pTHX_ RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
531 ANYOF_CLASS_ZERO(cl);
532 for (value = 0; value < 256; ++value)
533 ANYOF_BITMAP_SET(cl, value);
534 cl->flags = ANYOF_EOS|ANYOF_UNICODE_ALL;
536 cl->flags |= ANYOF_LOCALE;
539 /* Can match anything (initialization) */
541 S_cl_is_anything(pTHX_ struct regnode_charclass_class *cl)
545 for (value = 0; value <= ANYOF_MAX; value += 2)
546 if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1))
548 if (!(cl->flags & ANYOF_UNICODE_ALL))
550 for (value = 0; value < 256; ++value)
551 if (!ANYOF_BITMAP_TEST(cl, value))
556 /* Can match anything (initialization) */
558 S_cl_init(pTHX_ RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
560 Zero(cl, 1, struct regnode_charclass_class);
562 cl_anything(pRExC_state, cl);
566 S_cl_init_zero(pTHX_ RExC_state_t *pRExC_state, struct regnode_charclass_class *cl)
568 Zero(cl, 1, struct regnode_charclass_class);
570 cl_anything(pRExC_state, cl);
572 cl->flags |= ANYOF_LOCALE;
575 /* 'And' a given class with another one. Can create false positives */
576 /* We assume that cl is not inverted */
578 S_cl_and(pTHX_ struct regnode_charclass_class *cl,
579 struct regnode_charclass_class *and_with)
581 if (!(and_with->flags & ANYOF_CLASS)
582 && !(cl->flags & ANYOF_CLASS)
583 && (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
584 && !(and_with->flags & ANYOF_FOLD)
585 && !(cl->flags & ANYOF_FOLD)) {
588 if (and_with->flags & ANYOF_INVERT)
589 for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
590 cl->bitmap[i] &= ~and_with->bitmap[i];
592 for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
593 cl->bitmap[i] &= and_with->bitmap[i];
594 } /* XXXX: logic is complicated otherwise, leave it along for a moment. */
595 if (!(and_with->flags & ANYOF_EOS))
596 cl->flags &= ~ANYOF_EOS;
598 if (cl->flags & ANYOF_UNICODE_ALL && and_with->flags & ANYOF_UNICODE) {
599 cl->flags &= ~ANYOF_UNICODE_ALL;
600 cl->flags |= ANYOF_UNICODE;
601 ARG_SET(cl, ARG(and_with));
603 if (!(and_with->flags & ANYOF_UNICODE_ALL))
604 cl->flags &= ~ANYOF_UNICODE_ALL;
605 if (!(and_with->flags & (ANYOF_UNICODE|ANYOF_UNICODE_ALL)))
606 cl->flags &= ~ANYOF_UNICODE;
609 /* 'OR' a given class with another one. Can create false positives */
610 /* We assume that cl is not inverted */
612 S_cl_or(pTHX_ RExC_state_t *pRExC_state, struct regnode_charclass_class *cl, struct regnode_charclass_class *or_with)
614 if (or_with->flags & ANYOF_INVERT) {
616 * (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2))
617 * <= (B1 | !B2) | (CL1 | !CL2)
618 * which is wasteful if CL2 is small, but we ignore CL2:
619 * (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1
620 * XXXX Can we handle case-fold? Unclear:
621 * (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) =
622 * (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i'))
624 if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
625 && !(or_with->flags & ANYOF_FOLD)
626 && !(cl->flags & ANYOF_FOLD) ) {
629 for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
630 cl->bitmap[i] |= ~or_with->bitmap[i];
631 } /* XXXX: logic is complicated otherwise */
633 cl_anything(pRExC_state, cl);
636 /* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */
637 if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE)
638 && (!(or_with->flags & ANYOF_FOLD)
639 || (cl->flags & ANYOF_FOLD)) ) {
642 /* OR char bitmap and class bitmap separately */
643 for (i = 0; i < ANYOF_BITMAP_SIZE; i++)
644 cl->bitmap[i] |= or_with->bitmap[i];
645 if (or_with->flags & ANYOF_CLASS) {
646 for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++)
647 cl->classflags[i] |= or_with->classflags[i];
648 cl->flags |= ANYOF_CLASS;
651 else { /* XXXX: logic is complicated, leave it along for a moment. */
652 cl_anything(pRExC_state, cl);
655 if (or_with->flags & ANYOF_EOS)
656 cl->flags |= ANYOF_EOS;
658 if (cl->flags & ANYOF_UNICODE && or_with->flags & ANYOF_UNICODE &&
659 ARG(cl) != ARG(or_with)) {
660 cl->flags |= ANYOF_UNICODE_ALL;
661 cl->flags &= ~ANYOF_UNICODE;
663 if (or_with->flags & ANYOF_UNICODE_ALL) {
664 cl->flags |= ANYOF_UNICODE_ALL;
665 cl->flags &= ~ANYOF_UNICODE;
669 /* REx optimizer. Converts nodes into quickier variants "in place".
670 Finds fixed substrings. */
672 /* Stops at toplevel WHILEM as well as at `last'. At end *scanp is set
673 to the position after last scanned or to NULL. */
676 S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp, I32 *deltap, regnode *last, scan_data_t *data, U32 flags)
677 /* scanp: Start here (read-write). */
678 /* deltap: Write maxlen-minlen here. */
679 /* last: Stop before this one. */
681 I32 min = 0, pars = 0, code;
682 regnode *scan = *scanp, *next;
684 int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF);
685 int is_inf_internal = 0; /* The studied chunk is infinite */
686 I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0;
687 scan_data_t data_fake;
688 struct regnode_charclass_class and_with; /* Valid if flags & SCF_DO_STCLASS_OR */
690 while (scan && OP(scan) != END && scan < last) {
691 /* Peephole optimizer: */
693 if (PL_regkind[(U8)OP(scan)] == EXACT) {
694 /* Merge several consecutive EXACTish nodes into one. */
695 regnode *n = regnext(scan);
698 regnode *stop = scan;
701 next = scan + NODE_SZ_STR(scan);
702 /* Skip NOTHING, merge EXACT*. */
704 ( PL_regkind[(U8)OP(n)] == NOTHING ||
705 (stringok && (OP(n) == OP(scan))))
707 && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) {
708 if (OP(n) == TAIL || n > next)
710 if (PL_regkind[(U8)OP(n)] == NOTHING) {
711 NEXT_OFF(scan) += NEXT_OFF(n);
712 next = n + NODE_STEP_REGNODE;
720 int oldl = STR_LEN(scan);
721 regnode *nnext = regnext(n);
723 if (oldl + STR_LEN(n) > U8_MAX)
725 NEXT_OFF(scan) += NEXT_OFF(n);
726 STR_LEN(scan) += STR_LEN(n);
727 next = n + NODE_SZ_STR(n);
728 /* Now we can overwrite *n : */
729 Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char);
738 n = scan + NODE_SZ_STR(scan);
740 if (PL_regkind[(U8)OP(n)] != NOTHING || OP(n) == NOTHING) {
748 /* Follow the next-chain of the current node and optimize
749 away all the NOTHINGs from it. */
750 if (OP(scan) != CURLYX) {
751 int max = (reg_off_by_arg[OP(scan)]
753 /* I32 may be smaller than U16 on CRAYs! */
754 : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX));
755 int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan));
759 /* Skip NOTHING and LONGJMP. */
760 while ((n = regnext(n))
761 && ((PL_regkind[(U8)OP(n)] == NOTHING && (noff = NEXT_OFF(n)))
762 || ((OP(n) == LONGJMP) && (noff = ARG(n))))
765 if (reg_off_by_arg[OP(scan)])
768 NEXT_OFF(scan) = off;
770 /* The principal pseudo-switch. Cannot be a switch, since we
771 look into several different things. */
772 if (OP(scan) == BRANCH || OP(scan) == BRANCHJ
773 || OP(scan) == IFTHEN || OP(scan) == SUSPEND) {
774 next = regnext(scan);
777 if (OP(next) == code || code == IFTHEN || code == SUSPEND) {
778 I32 max1 = 0, min1 = I32_MAX, num = 0;
779 struct regnode_charclass_class accum;
781 if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */
782 scan_commit(pRExC_state, data); /* Cannot merge strings after this. */
783 if (flags & SCF_DO_STCLASS)
784 cl_init_zero(pRExC_state, &accum);
785 while (OP(scan) == code) {
786 I32 deltanext, minnext, f = 0, fake;
787 struct regnode_charclass_class this_class;
792 data_fake.whilem_c = data->whilem_c;
793 data_fake.last_closep = data->last_closep;
796 data_fake.last_closep = &fake;
797 next = regnext(scan);
798 scan = NEXTOPER(scan);
800 scan = NEXTOPER(scan);
801 if (flags & SCF_DO_STCLASS) {
802 cl_init(pRExC_state, &this_class);
803 data_fake.start_class = &this_class;
804 f = SCF_DO_STCLASS_AND;
806 if (flags & SCF_WHILEM_VISITED_POS)
807 f |= SCF_WHILEM_VISITED_POS;
808 /* we suppose the run is continuous, last=next...*/
809 minnext = study_chunk(pRExC_state, &scan, &deltanext,
810 next, &data_fake, f);
813 if (max1 < minnext + deltanext)
814 max1 = minnext + deltanext;
815 if (deltanext == I32_MAX)
816 is_inf = is_inf_internal = 1;
818 if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
820 if (data && (data_fake.flags & SF_HAS_EVAL))
821 data->flags |= SF_HAS_EVAL;
823 data->whilem_c = data_fake.whilem_c;
824 if (flags & SCF_DO_STCLASS)
825 cl_or(pRExC_state, &accum, &this_class);
829 if (code == IFTHEN && num < 2) /* Empty ELSE branch */
831 if (flags & SCF_DO_SUBSTR) {
832 data->pos_min += min1;
833 data->pos_delta += max1 - min1;
834 if (max1 != min1 || is_inf)
835 data->longest = &(data->longest_float);
838 delta += max1 - min1;
839 if (flags & SCF_DO_STCLASS_OR) {
840 cl_or(pRExC_state, data->start_class, &accum);
842 cl_and(data->start_class, &and_with);
843 flags &= ~SCF_DO_STCLASS;
846 else if (flags & SCF_DO_STCLASS_AND) {
848 cl_and(data->start_class, &accum);
849 flags &= ~SCF_DO_STCLASS;
852 /* Switch to OR mode: cache the old value of
853 * data->start_class */
854 StructCopy(data->start_class, &and_with,
855 struct regnode_charclass_class);
856 flags &= ~SCF_DO_STCLASS_AND;
857 StructCopy(&accum, data->start_class,
858 struct regnode_charclass_class);
859 flags |= SCF_DO_STCLASS_OR;
860 data->start_class->flags |= ANYOF_EOS;
864 else if (code == BRANCHJ) /* single branch is optimized. */
865 scan = NEXTOPER(NEXTOPER(scan));
866 else /* single branch is optimized. */
867 scan = NEXTOPER(scan);
870 else if (OP(scan) == EXACT) {
871 I32 l = STR_LEN(scan);
872 UV uc = *((U8*)STRING(scan));
874 U8 *s = (U8*)STRING(scan);
875 l = utf8_length(s, s + l);
876 uc = utf8_to_uvchr(s, NULL);
879 if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */
880 /* The code below prefers earlier match for fixed
881 offset, later match for variable offset. */
882 if (data->last_end == -1) { /* Update the start info. */
883 data->last_start_min = data->pos_min;
884 data->last_start_max = is_inf
885 ? I32_MAX : data->pos_min + data->pos_delta;
887 sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan));
888 data->last_end = data->pos_min + l;
889 data->pos_min += l; /* As in the first entry. */
890 data->flags &= ~SF_BEFORE_EOL;
892 if (flags & SCF_DO_STCLASS_AND) {
893 /* Check whether it is compatible with what we know already! */
897 (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
898 && !ANYOF_BITMAP_TEST(data->start_class, uc)
899 && (!(data->start_class->flags & ANYOF_FOLD)
900 || !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
903 ANYOF_CLASS_ZERO(data->start_class);
904 ANYOF_BITMAP_ZERO(data->start_class);
906 ANYOF_BITMAP_SET(data->start_class, uc);
907 data->start_class->flags &= ~ANYOF_EOS;
909 data->start_class->flags &= ~ANYOF_UNICODE_ALL;
911 else if (flags & SCF_DO_STCLASS_OR) {
912 /* false positive possible if the class is case-folded */
914 ANYOF_BITMAP_SET(data->start_class, uc);
916 data->start_class->flags |= ANYOF_UNICODE_ALL;
917 data->start_class->flags &= ~ANYOF_EOS;
918 cl_and(data->start_class, &and_with);
920 flags &= ~SCF_DO_STCLASS;
922 else if (PL_regkind[(U8)OP(scan)] == EXACT) { /* But OP != EXACT! */
923 I32 l = STR_LEN(scan);
924 UV uc = *((U8*)STRING(scan));
926 /* Search for fixed substrings supports EXACT only. */
927 if (flags & SCF_DO_SUBSTR)
928 scan_commit(pRExC_state, data);
930 U8 *s = (U8 *)STRING(scan);
931 l = utf8_length(s, s + l);
932 uc = utf8_to_uvchr(s, NULL);
935 if (data && (flags & SCF_DO_SUBSTR))
937 if (flags & SCF_DO_STCLASS_AND) {
938 /* Check whether it is compatible with what we know already! */
942 (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE))
943 && !ANYOF_BITMAP_TEST(data->start_class, uc)
944 && !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc])))
946 ANYOF_CLASS_ZERO(data->start_class);
947 ANYOF_BITMAP_ZERO(data->start_class);
949 ANYOF_BITMAP_SET(data->start_class, uc);
950 data->start_class->flags &= ~ANYOF_EOS;
951 data->start_class->flags |= ANYOF_FOLD;
952 if (OP(scan) == EXACTFL)
953 data->start_class->flags |= ANYOF_LOCALE;
956 else if (flags & SCF_DO_STCLASS_OR) {
957 if (data->start_class->flags & ANYOF_FOLD) {
958 /* false positive possible if the class is case-folded.
959 Assume that the locale settings are the same... */
961 ANYOF_BITMAP_SET(data->start_class, uc);
962 data->start_class->flags &= ~ANYOF_EOS;
964 cl_and(data->start_class, &and_with);
966 flags &= ~SCF_DO_STCLASS;
968 else if (strchr((char*)PL_varies,OP(scan))) {
969 I32 mincount, maxcount, minnext, deltanext, fl = 0;
970 I32 f = flags, pos_before = 0;
971 regnode *oscan = scan;
972 struct regnode_charclass_class this_class;
973 struct regnode_charclass_class *oclass = NULL;
975 switch (PL_regkind[(U8)OP(scan)]) {
976 case WHILEM: /* End of (?:...)* . */
977 scan = NEXTOPER(scan);
980 if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) {
981 next = NEXTOPER(scan);
982 if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) {
984 maxcount = REG_INFTY;
985 next = regnext(scan);
986 scan = NEXTOPER(scan);
990 if (flags & SCF_DO_SUBSTR)
995 if (flags & SCF_DO_STCLASS) {
997 maxcount = REG_INFTY;
998 next = regnext(scan);
999 scan = NEXTOPER(scan);
1002 is_inf = is_inf_internal = 1;
1003 scan = regnext(scan);
1004 if (flags & SCF_DO_SUBSTR) {
1005 scan_commit(pRExC_state, data); /* Cannot extend fixed substrings */
1006 data->longest = &(data->longest_float);
1008 goto optimize_curly_tail;
1010 mincount = ARG1(scan);
1011 maxcount = ARG2(scan);
1012 next = regnext(scan);
1013 if (OP(scan) == CURLYX) {
1014 I32 lp = (data ? *(data->last_closep) : 0);
1016 scan->flags = ((lp <= U8_MAX) ? lp : U8_MAX);
1018 scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
1020 if (flags & SCF_DO_SUBSTR) {
1021 if (mincount == 0) scan_commit(pRExC_state,data); /* Cannot extend fixed substrings */
1022 pos_before = data->pos_min;
1026 data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL);
1028 data->flags |= SF_IS_INF;
1030 if (flags & SCF_DO_STCLASS) {
1031 cl_init(pRExC_state, &this_class);
1032 oclass = data->start_class;
1033 data->start_class = &this_class;
1034 f |= SCF_DO_STCLASS_AND;
1035 f &= ~SCF_DO_STCLASS_OR;
1037 /* These are the cases when once a subexpression
1038 fails at a particular position, it cannot succeed
1039 even after backtracking at the enclosing scope.
1041 XXXX what if minimal match and we are at the
1042 initial run of {n,m}? */
1043 if ((mincount != maxcount - 1) && (maxcount != REG_INFTY))
1044 f &= ~SCF_WHILEM_VISITED_POS;
1046 /* This will finish on WHILEM, setting scan, or on NULL: */
1047 minnext = study_chunk(pRExC_state, &scan, &deltanext, last, data,
1049 ? (f & ~SCF_DO_SUBSTR) : f);
1051 if (flags & SCF_DO_STCLASS)
1052 data->start_class = oclass;
1053 if (mincount == 0 || minnext == 0) {
1054 if (flags & SCF_DO_STCLASS_OR) {
1055 cl_or(pRExC_state, data->start_class, &this_class);
1057 else if (flags & SCF_DO_STCLASS_AND) {
1058 /* Switch to OR mode: cache the old value of
1059 * data->start_class */
1060 StructCopy(data->start_class, &and_with,
1061 struct regnode_charclass_class);
1062 flags &= ~SCF_DO_STCLASS_AND;
1063 StructCopy(&this_class, data->start_class,
1064 struct regnode_charclass_class);
1065 flags |= SCF_DO_STCLASS_OR;
1066 data->start_class->flags |= ANYOF_EOS;
1068 } else { /* Non-zero len */
1069 if (flags & SCF_DO_STCLASS_OR) {
1070 cl_or(pRExC_state, data->start_class, &this_class);
1071 cl_and(data->start_class, &and_with);
1073 else if (flags & SCF_DO_STCLASS_AND)
1074 cl_and(data->start_class, &this_class);
1075 flags &= ~SCF_DO_STCLASS;
1077 if (!scan) /* It was not CURLYX, but CURLY. */
1079 if (ckWARN(WARN_REGEXP)
1080 && (minnext == 0) && (deltanext == 0)
1081 && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR))
1082 && maxcount <= REG_INFTY/3) /* Complement check for big count */
1085 "Quantifier unexpected on zero-length expression");
1088 min += minnext * mincount;
1089 is_inf_internal |= ((maxcount == REG_INFTY
1090 && (minnext + deltanext) > 0)
1091 || deltanext == I32_MAX);
1092 is_inf |= is_inf_internal;
1093 delta += (minnext + deltanext) * maxcount - minnext * mincount;
1095 /* Try powerful optimization CURLYX => CURLYN. */
1096 if ( OP(oscan) == CURLYX && data
1097 && data->flags & SF_IN_PAR
1098 && !(data->flags & SF_HAS_EVAL)
1099 && !deltanext && minnext == 1 ) {
1100 /* Try to optimize to CURLYN. */
1101 regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS;
1102 regnode *nxt1 = nxt;
1109 if (!strchr((char*)PL_simple,OP(nxt))
1110 && !(PL_regkind[(U8)OP(nxt)] == EXACT
1111 && STR_LEN(nxt) == 1))
1117 if (OP(nxt) != CLOSE)
1119 /* Now we know that nxt2 is the only contents: */
1120 oscan->flags = ARG(nxt);
1122 OP(nxt1) = NOTHING; /* was OPEN. */
1124 OP(nxt1 + 1) = OPTIMIZED; /* was count. */
1125 NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */
1126 NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */
1127 OP(nxt) = OPTIMIZED; /* was CLOSE. */
1128 OP(nxt + 1) = OPTIMIZED; /* was count. */
1129 NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */
1134 /* Try optimization CURLYX => CURLYM. */
1135 if ( OP(oscan) == CURLYX && data
1136 && !(data->flags & SF_HAS_PAR)
1137 && !(data->flags & SF_HAS_EVAL)
1139 /* XXXX How to optimize if data == 0? */
1140 /* Optimize to a simpler form. */
1141 regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */
1145 while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/
1146 && (OP(nxt2) != WHILEM))
1148 OP(nxt2) = SUCCEED; /* Whas WHILEM */
1149 /* Need to optimize away parenths. */
1150 if (data->flags & SF_IN_PAR) {
1151 /* Set the parenth number. */
1152 regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/
1154 if (OP(nxt) != CLOSE)
1155 FAIL("Panic opt close");
1156 oscan->flags = ARG(nxt);
1157 OP(nxt1) = OPTIMIZED; /* was OPEN. */
1158 OP(nxt) = OPTIMIZED; /* was CLOSE. */
1160 OP(nxt1 + 1) = OPTIMIZED; /* was count. */
1161 OP(nxt + 1) = OPTIMIZED; /* was count. */
1162 NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */
1163 NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */
1166 while ( nxt1 && (OP(nxt1) != WHILEM)) {
1167 regnode *nnxt = regnext(nxt1);
1170 if (reg_off_by_arg[OP(nxt1)])
1171 ARG_SET(nxt1, nxt2 - nxt1);
1172 else if (nxt2 - nxt1 < U16_MAX)
1173 NEXT_OFF(nxt1) = nxt2 - nxt1;
1175 OP(nxt) = NOTHING; /* Cannot beautify */
1180 /* Optimize again: */
1181 study_chunk(pRExC_state, &nxt1, &deltanext, nxt,
1187 else if ((OP(oscan) == CURLYX)
1188 && (flags & SCF_WHILEM_VISITED_POS)
1189 /* See the comment on a similar expression above.
1190 However, this time it not a subexpression
1191 we care about, but the expression itself. */
1192 && (maxcount == REG_INFTY)
1193 && data && ++data->whilem_c < 16) {
1194 /* This stays as CURLYX, we can put the count/of pair. */
1195 /* Find WHILEM (as in regexec.c) */
1196 regnode *nxt = oscan + NEXT_OFF(oscan);
1198 if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */
1200 PREVOPER(nxt)->flags = data->whilem_c
1201 | (RExC_whilem_seen << 4); /* On WHILEM */
1203 if (data && fl & (SF_HAS_PAR|SF_IN_PAR))
1205 if (flags & SCF_DO_SUBSTR) {
1206 SV *last_str = Nullsv;
1207 int counted = mincount != 0;
1209 if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */
1210 I32 b = pos_before >= data->last_start_min
1211 ? pos_before : data->last_start_min;
1213 char *s = SvPV(data->last_found, l);
1214 I32 old = b - data->last_start_min;
1217 old = utf8_hop((U8*)s, old) - (U8*)s;
1220 /* Get the added string: */
1221 last_str = newSVpvn(s + old, l);
1222 if (deltanext == 0 && pos_before == b) {
1223 /* What was added is a constant string */
1225 SvGROW(last_str, (mincount * l) + 1);
1226 repeatcpy(SvPVX(last_str) + l,
1227 SvPVX(last_str), l, mincount - 1);
1228 SvCUR(last_str) *= mincount;
1229 /* Add additional parts. */
1230 SvCUR_set(data->last_found,
1231 SvCUR(data->last_found) - l);
1232 sv_catsv(data->last_found, last_str);
1233 data->last_end += l * (mincount - 1);
1236 /* start offset must point into the last copy */
1237 data->last_start_min += minnext * (mincount - 1);
1238 data->last_start_max += is_inf ? 0 : (maxcount - 1)
1239 * (minnext + data->pos_delta);
1242 /* It is counted once already... */
1243 data->pos_min += minnext * (mincount - counted);
1244 data->pos_delta += - counted * deltanext +
1245 (minnext + deltanext) * maxcount - minnext * mincount;
1246 if (mincount != maxcount) {
1247 /* Cannot extend fixed substrings found inside
1249 scan_commit(pRExC_state,data);
1250 if (mincount && last_str) {
1251 sv_setsv(data->last_found, last_str);
1252 data->last_end = data->pos_min;
1253 data->last_start_min =
1254 data->pos_min - CHR_SVLEN(last_str);
1255 data->last_start_max = is_inf
1257 : data->pos_min + data->pos_delta
1258 - CHR_SVLEN(last_str);
1260 data->longest = &(data->longest_float);
1262 SvREFCNT_dec(last_str);
1264 if (data && (fl & SF_HAS_EVAL))
1265 data->flags |= SF_HAS_EVAL;
1266 optimize_curly_tail:
1267 if (OP(oscan) != CURLYX) {
1268 while (PL_regkind[(U8)OP(next = regnext(oscan))] == NOTHING
1270 NEXT_OFF(oscan) += NEXT_OFF(next);
1273 default: /* REF and CLUMP only? */
1274 if (flags & SCF_DO_SUBSTR) {
1275 scan_commit(pRExC_state,data); /* Cannot expect anything... */
1276 data->longest = &(data->longest_float);
1278 is_inf = is_inf_internal = 1;
1279 if (flags & SCF_DO_STCLASS_OR)
1280 cl_anything(pRExC_state, data->start_class);
1281 flags &= ~SCF_DO_STCLASS;
1285 else if (strchr((char*)PL_simple,OP(scan))) {
1288 if (flags & SCF_DO_SUBSTR) {
1289 scan_commit(pRExC_state,data);
1293 if (flags & SCF_DO_STCLASS) {
1294 data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */
1296 /* Some of the logic below assumes that switching
1297 locale on will only add false positives. */
1298 switch (PL_regkind[(U8)OP(scan)]) {
1302 /* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */
1303 if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
1304 cl_anything(pRExC_state, data->start_class);
1307 if (OP(scan) == SANY)
1309 if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */
1310 value = (ANYOF_BITMAP_TEST(data->start_class,'\n')
1311 || (data->start_class->flags & ANYOF_CLASS));
1312 cl_anything(pRExC_state, data->start_class);
1314 if (flags & SCF_DO_STCLASS_AND || !value)
1315 ANYOF_BITMAP_CLEAR(data->start_class,'\n');
1318 if (flags & SCF_DO_STCLASS_AND)
1319 cl_and(data->start_class,
1320 (struct regnode_charclass_class*)scan);
1322 cl_or(pRExC_state, data->start_class,
1323 (struct regnode_charclass_class*)scan);
1326 if (flags & SCF_DO_STCLASS_AND) {
1327 if (!(data->start_class->flags & ANYOF_LOCALE)) {
1328 ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
1329 for (value = 0; value < 256; value++)
1330 if (!isALNUM(value))
1331 ANYOF_BITMAP_CLEAR(data->start_class, value);
1335 if (data->start_class->flags & ANYOF_LOCALE)
1336 ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
1338 for (value = 0; value < 256; value++)
1340 ANYOF_BITMAP_SET(data->start_class, value);
1345 if (flags & SCF_DO_STCLASS_AND) {
1346 if (data->start_class->flags & ANYOF_LOCALE)
1347 ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM);
1350 ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM);
1351 data->start_class->flags |= ANYOF_LOCALE;
1355 if (flags & SCF_DO_STCLASS_AND) {
1356 if (!(data->start_class->flags & ANYOF_LOCALE)) {
1357 ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
1358 for (value = 0; value < 256; value++)
1360 ANYOF_BITMAP_CLEAR(data->start_class, value);
1364 if (data->start_class->flags & ANYOF_LOCALE)
1365 ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
1367 for (value = 0; value < 256; value++)
1368 if (!isALNUM(value))
1369 ANYOF_BITMAP_SET(data->start_class, value);
1374 if (flags & SCF_DO_STCLASS_AND) {
1375 if (data->start_class->flags & ANYOF_LOCALE)
1376 ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM);
1379 data->start_class->flags |= ANYOF_LOCALE;
1380 ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM);
1384 if (flags & SCF_DO_STCLASS_AND) {
1385 if (!(data->start_class->flags & ANYOF_LOCALE)) {
1386 ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
1387 for (value = 0; value < 256; value++)
1388 if (!isSPACE(value))
1389 ANYOF_BITMAP_CLEAR(data->start_class, value);
1393 if (data->start_class->flags & ANYOF_LOCALE)
1394 ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
1396 for (value = 0; value < 256; value++)
1398 ANYOF_BITMAP_SET(data->start_class, value);
1403 if (flags & SCF_DO_STCLASS_AND) {
1404 if (data->start_class->flags & ANYOF_LOCALE)
1405 ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE);
1408 data->start_class->flags |= ANYOF_LOCALE;
1409 ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE);
1413 if (flags & SCF_DO_STCLASS_AND) {
1414 if (!(data->start_class->flags & ANYOF_LOCALE)) {
1415 ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
1416 for (value = 0; value < 256; value++)
1418 ANYOF_BITMAP_CLEAR(data->start_class, value);
1422 if (data->start_class->flags & ANYOF_LOCALE)
1423 ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
1425 for (value = 0; value < 256; value++)
1426 if (!isSPACE(value))
1427 ANYOF_BITMAP_SET(data->start_class, value);
1432 if (flags & SCF_DO_STCLASS_AND) {
1433 if (data->start_class->flags & ANYOF_LOCALE) {
1434 ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE);
1435 for (value = 0; value < 256; value++)
1436 if (!isSPACE(value))
1437 ANYOF_BITMAP_CLEAR(data->start_class, value);
1441 data->start_class->flags |= ANYOF_LOCALE;
1442 ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE);
1446 if (flags & SCF_DO_STCLASS_AND) {
1447 ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT);
1448 for (value = 0; value < 256; value++)
1449 if (!isDIGIT(value))
1450 ANYOF_BITMAP_CLEAR(data->start_class, value);
1453 if (data->start_class->flags & ANYOF_LOCALE)
1454 ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT);
1456 for (value = 0; value < 256; value++)
1458 ANYOF_BITMAP_SET(data->start_class, value);
1463 if (flags & SCF_DO_STCLASS_AND) {
1464 ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT);
1465 for (value = 0; value < 256; value++)
1467 ANYOF_BITMAP_CLEAR(data->start_class, value);
1470 if (data->start_class->flags & ANYOF_LOCALE)
1471 ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT);
1473 for (value = 0; value < 256; value++)
1474 if (!isDIGIT(value))
1475 ANYOF_BITMAP_SET(data->start_class, value);
1480 if (flags & SCF_DO_STCLASS_OR)
1481 cl_and(data->start_class, &and_with);
1482 flags &= ~SCF_DO_STCLASS;
1485 else if (PL_regkind[(U8)OP(scan)] == EOL && flags & SCF_DO_SUBSTR) {
1486 data->flags |= (OP(scan) == MEOL
1490 else if ( PL_regkind[(U8)OP(scan)] == BRANCHJ
1491 /* Lookbehind, or need to calculate parens/evals/stclass: */
1492 && (scan->flags || data || (flags & SCF_DO_STCLASS))
1493 && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) {
1494 /* Lookahead/lookbehind */
1495 I32 deltanext, minnext, fake = 0;
1497 struct regnode_charclass_class intrnl;
1500 data_fake.flags = 0;
1502 data_fake.whilem_c = data->whilem_c;
1503 data_fake.last_closep = data->last_closep;
1506 data_fake.last_closep = &fake;
1507 if ( flags & SCF_DO_STCLASS && !scan->flags
1508 && OP(scan) == IFMATCH ) { /* Lookahead */
1509 cl_init(pRExC_state, &intrnl);
1510 data_fake.start_class = &intrnl;
1511 f |= SCF_DO_STCLASS_AND;
1513 if (flags & SCF_WHILEM_VISITED_POS)
1514 f |= SCF_WHILEM_VISITED_POS;
1515 next = regnext(scan);
1516 nscan = NEXTOPER(NEXTOPER(scan));
1517 minnext = study_chunk(pRExC_state, &nscan, &deltanext, last, &data_fake, f);
1520 vFAIL("Variable length lookbehind not implemented");
1522 else if (minnext > U8_MAX) {
1523 vFAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX);
1525 scan->flags = minnext;
1527 if (data && data_fake.flags & (SF_HAS_PAR|SF_IN_PAR))
1529 if (data && (data_fake.flags & SF_HAS_EVAL))
1530 data->flags |= SF_HAS_EVAL;
1532 data->whilem_c = data_fake.whilem_c;
1533 if (f & SCF_DO_STCLASS_AND) {
1534 int was = (data->start_class->flags & ANYOF_EOS);
1536 cl_and(data->start_class, &intrnl);
1538 data->start_class->flags |= ANYOF_EOS;
1541 else if (OP(scan) == OPEN) {
1544 else if (OP(scan) == CLOSE) {
1545 if (ARG(scan) == is_par) {
1546 next = regnext(scan);
1548 if ( next && (OP(next) != WHILEM) && next < last)
1549 is_par = 0; /* Disable optimization */
1552 *(data->last_closep) = ARG(scan);
1554 else if (OP(scan) == EVAL) {
1556 data->flags |= SF_HAS_EVAL;
1558 else if (OP(scan) == LOGICAL && scan->flags == 2) { /* Embedded follows */
1559 if (flags & SCF_DO_SUBSTR) {
1560 scan_commit(pRExC_state,data);
1561 data->longest = &(data->longest_float);
1563 is_inf = is_inf_internal = 1;
1564 if (flags & SCF_DO_STCLASS_OR) /* Allow everything */
1565 cl_anything(pRExC_state, data->start_class);
1566 flags &= ~SCF_DO_STCLASS;
1568 /* Else: zero-length, ignore. */
1569 scan = regnext(scan);
1574 *deltap = is_inf_internal ? I32_MAX : delta;
1575 if (flags & SCF_DO_SUBSTR && is_inf)
1576 data->pos_delta = I32_MAX - data->pos_min;
1577 if (is_par > U8_MAX)
1579 if (is_par && pars==1 && data) {
1580 data->flags |= SF_IN_PAR;
1581 data->flags &= ~SF_HAS_PAR;
1583 else if (pars && data) {
1584 data->flags |= SF_HAS_PAR;
1585 data->flags &= ~SF_IN_PAR;
1587 if (flags & SCF_DO_STCLASS_OR)
1588 cl_and(data->start_class, &and_with);
1593 S_add_data(pTHX_ RExC_state_t *pRExC_state, I32 n, char *s)
1595 if (RExC_rx->data) {
1596 Renewc(RExC_rx->data,
1597 sizeof(*RExC_rx->data) + sizeof(void*) * (RExC_rx->data->count + n - 1),
1598 char, struct reg_data);
1599 Renew(RExC_rx->data->what, RExC_rx->data->count + n, U8);
1600 RExC_rx->data->count += n;
1603 Newc(1207, RExC_rx->data, sizeof(*RExC_rx->data) + sizeof(void*) * (n - 1),
1604 char, struct reg_data);
1605 New(1208, RExC_rx->data->what, n, U8);
1606 RExC_rx->data->count = n;
1608 Copy(s, RExC_rx->data->what + RExC_rx->data->count - n, n, U8);
1609 return RExC_rx->data->count - n;
1613 Perl_reginitcolors(pTHX)
1616 char *s = PerlEnv_getenv("PERL_RE_COLORS");
1619 PL_colors[0] = s = savepv(s);
1621 s = strchr(s, '\t');
1627 PL_colors[i] = s = "";
1631 PL_colors[i++] = "";
1638 - pregcomp - compile a regular expression into internal code
1640 * We can't allocate space until we know how big the compiled form will be,
1641 * but we can't compile it (and thus know how big it is) until we've got a
1642 * place to put the code. So we cheat: we compile it twice, once with code
1643 * generation turned off and size counting turned on, and once "for real".
1644 * This also means that we don't allocate space until we are sure that the
1645 * thing really will compile successfully, and we never have to move the
1646 * code and thus invalidate pointers into it. (Note that it has to be in
1647 * one piece because free() must be able to free it all.) [NB: not true in perl]
1649 * Beware that the optimization-preparation code in here knows about some
1650 * of the structure of the compiled regexp. [I'll say.]
1653 Perl_pregcomp(pTHX_ char *exp, char *xend, PMOP *pm)
1663 RExC_state_t RExC_state;
1664 RExC_state_t *pRExC_state = &RExC_state;
1667 FAIL("NULL regexp argument");
1669 /* XXXX This looks very suspicious... */
1670 if (pm->op_pmdynflags & PMdf_CMP_UTF8)
1676 DEBUG_r(if (!PL_colorset) reginitcolors());
1677 DEBUG_r(PerlIO_printf(Perl_debug_log, "%sCompiling REx%s `%s%*s%s'\n",
1678 PL_colors[4],PL_colors[5],PL_colors[0],
1679 (int)(xend - exp), RExC_precomp, PL_colors[1]));
1680 RExC_flags16 = pm->op_pmflags;
1684 RExC_seen_zerolen = *exp == '^' ? -1 : 0;
1685 RExC_seen_evals = 0;
1688 /* First pass: determine size, legality. */
1695 RExC_emit = &PL_regdummy;
1696 RExC_whilem_seen = 0;
1697 #if 0 /* REGC() is (currently) a NOP at the first pass.
1698 * Clever compilers notice this and complain. --jhi */
1699 REGC((U8)REG_MAGIC, (char*)RExC_emit);
1701 if (reg(pRExC_state, 0, &flags) == NULL) {
1702 RExC_precomp = Nullch;
1705 DEBUG_r(PerlIO_printf(Perl_debug_log, "size %"IVdf" ", (IV)RExC_size));
1707 /* Small enough for pointer-storage convention?
1708 If extralen==0, this means that we will not need long jumps. */
1709 if (RExC_size >= 0x10000L && RExC_extralen)
1710 RExC_size += RExC_extralen;
1713 if (RExC_whilem_seen > 15)
1714 RExC_whilem_seen = 15;
1716 /* Allocate space and initialize. */
1717 Newc(1001, r, sizeof(regexp) + (unsigned)RExC_size * sizeof(regnode),
1720 FAIL("Regexp out of space");
1723 /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */
1724 Zero(r, sizeof(regexp) + (unsigned)RExC_size * sizeof(regnode), char);
1727 r->prelen = xend - exp;
1728 r->precomp = savepvn(RExC_precomp, r->prelen);
1730 r->reganch = pm->op_pmflags & PMf_COMPILETIME;
1731 r->nparens = RExC_npar - 1; /* set early to validate backrefs */
1733 r->substrs = 0; /* Useful during FAIL. */
1734 r->startp = 0; /* Useful during FAIL. */
1735 r->endp = 0; /* Useful during FAIL. */
1737 Newz(1304, r->offsets, 2*RExC_size+1, U32); /* MJD 20001228 */
1739 r->offsets[0] = RExC_size;
1741 DEBUG_r(PerlIO_printf(Perl_debug_log,
1742 "%s %"UVuf" bytes for offset annotations.\n",
1743 r->offsets ? "Got" : "Couldn't get",
1744 (UV)((2*RExC_size+1) * sizeof(U32))));
1748 /* Second pass: emit code. */
1749 RExC_flags16 = pm->op_pmflags; /* don't let top level (?i) bleed */
1754 RExC_emit_start = r->program;
1755 RExC_emit = r->program;
1756 /* Store the count of eval-groups for security checks: */
1757 RExC_emit->next_off = ((RExC_seen_evals > U16_MAX) ? U16_MAX : RExC_seen_evals);
1758 REGC((U8)REG_MAGIC, (char*) RExC_emit++);
1760 if (reg(pRExC_state, 0, &flags) == NULL)
1763 /* Dig out information for optimizations. */
1764 r->reganch = pm->op_pmflags & PMf_COMPILETIME; /* Again? */
1765 pm->op_pmflags = RExC_flags16;
1767 r->reganch |= ROPT_UTF8;
1768 r->regstclass = NULL;
1769 if (RExC_naughty >= 10) /* Probably an expensive pattern. */
1770 r->reganch |= ROPT_NAUGHTY;
1771 scan = r->program + 1; /* First BRANCH. */
1773 /* XXXX To minimize changes to RE engine we always allocate
1774 3-units-long substrs field. */
1775 Newz(1004, r->substrs, 1, struct reg_substr_data);
1777 StructCopy(&zero_scan_data, &data, scan_data_t);
1778 /* XXXX Should not we check for something else? Usually it is OPEN1... */
1779 if (OP(scan) != BRANCH) { /* Only one top-level choice. */
1781 STRLEN longest_float_length, longest_fixed_length;
1782 struct regnode_charclass_class ch_class;
1787 /* Skip introductions and multiplicators >= 1. */
1788 while ((OP(first) == OPEN && (sawopen = 1)) ||
1789 /* An OR of *one* alternative - should not happen now. */
1790 (OP(first) == BRANCH && OP(regnext(first)) != BRANCH) ||
1791 (OP(first) == PLUS) ||
1792 (OP(first) == MINMOD) ||
1793 /* An {n,m} with n>0 */
1794 (PL_regkind[(U8)OP(first)] == CURLY && ARG1(first) > 0) ) {
1795 if (OP(first) == PLUS)
1798 first += regarglen[(U8)OP(first)];
1799 first = NEXTOPER(first);
1802 /* Starting-point info. */
1804 if (PL_regkind[(U8)OP(first)] == EXACT) {
1805 if (OP(first) == EXACT)
1806 ; /* Empty, get anchored substr later. */
1807 else if ((OP(first) == EXACTF || OP(first) == EXACTFL))
1808 r->regstclass = first;
1810 else if (strchr((char*)PL_simple,OP(first)))
1811 r->regstclass = first;
1812 else if (PL_regkind[(U8)OP(first)] == BOUND ||
1813 PL_regkind[(U8)OP(first)] == NBOUND)
1814 r->regstclass = first;
1815 else if (PL_regkind[(U8)OP(first)] == BOL) {
1816 r->reganch |= (OP(first) == MBOL
1818 : (OP(first) == SBOL
1821 first = NEXTOPER(first);
1824 else if (OP(first) == GPOS) {
1825 r->reganch |= ROPT_ANCH_GPOS;
1826 first = NEXTOPER(first);
1829 else if ((OP(first) == STAR &&
1830 PL_regkind[(U8)OP(NEXTOPER(first))] == REG_ANY) &&
1831 !(r->reganch & ROPT_ANCH) )
1833 /* turn .* into ^.* with an implied $*=1 */
1834 int type = OP(NEXTOPER(first));
1836 if (type == REG_ANY)
1837 type = ROPT_ANCH_MBOL;
1839 type = ROPT_ANCH_SBOL;
1841 r->reganch |= type | ROPT_IMPLICIT;
1842 first = NEXTOPER(first);
1845 if (sawplus && (!sawopen || !RExC_sawback)
1846 && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */
1847 /* x+ must match at the 1st pos of run of x's */
1848 r->reganch |= ROPT_SKIP;
1850 /* Scan is after the zeroth branch, first is atomic matcher. */
1851 DEBUG_r(PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
1852 (IV)(first - scan + 1)));
1854 * If there's something expensive in the r.e., find the
1855 * longest literal string that must appear and make it the
1856 * regmust. Resolve ties in favor of later strings, since
1857 * the regstart check works with the beginning of the r.e.
1858 * and avoiding duplication strengthens checking. Not a
1859 * strong reason, but sufficient in the absence of others.
1860 * [Now we resolve ties in favor of the earlier string if
1861 * it happens that c_offset_min has been invalidated, since the
1862 * earlier string may buy us something the later one won't.]
1866 data.longest_fixed = newSVpvn("",0);
1867 data.longest_float = newSVpvn("",0);
1868 data.last_found = newSVpvn("",0);
1869 data.longest = &(data.longest_fixed);
1871 if (!r->regstclass) {
1872 cl_init(pRExC_state, &ch_class);
1873 data.start_class = &ch_class;
1874 stclass_flag = SCF_DO_STCLASS_AND;
1875 } else /* XXXX Check for BOUND? */
1877 data.last_closep = &last_close;
1879 minlen = study_chunk(pRExC_state, &first, &fake, scan + RExC_size, /* Up to end */
1880 &data, SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag);
1881 if ( RExC_npar == 1 && data.longest == &(data.longest_fixed)
1882 && data.last_start_min == 0 && data.last_end > 0
1883 && !RExC_seen_zerolen
1884 && (!(RExC_seen & REG_SEEN_GPOS) || (r->reganch & ROPT_ANCH_GPOS)))
1885 r->reganch |= ROPT_CHECK_ALL;
1886 scan_commit(pRExC_state, &data);
1887 SvREFCNT_dec(data.last_found);
1889 longest_float_length = CHR_SVLEN(data.longest_float);
1890 if (longest_float_length
1891 || (data.flags & SF_FL_BEFORE_EOL
1892 && (!(data.flags & SF_FL_BEFORE_MEOL)
1893 || (RExC_flags16 & PMf_MULTILINE)))) {
1896 if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */
1897 && data.offset_fixed == data.offset_float_min
1898 && SvCUR(data.longest_fixed) == SvCUR(data.longest_float))
1899 goto remove_float; /* As in (a)+. */
1901 r->float_substr = data.longest_float;
1902 r->float_min_offset = data.offset_float_min;
1903 r->float_max_offset = data.offset_float_max;
1904 t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */
1905 && (!(data.flags & SF_FL_BEFORE_MEOL)
1906 || (RExC_flags16 & PMf_MULTILINE)));
1907 fbm_compile(r->float_substr, t ? FBMcf_TAIL : 0);
1911 r->float_substr = Nullsv;
1912 SvREFCNT_dec(data.longest_float);
1913 longest_float_length = 0;
1916 longest_fixed_length = CHR_SVLEN(data.longest_fixed);
1917 if (longest_fixed_length
1918 || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */
1919 && (!(data.flags & SF_FIX_BEFORE_MEOL)
1920 || (RExC_flags16 & PMf_MULTILINE)))) {
1923 r->anchored_substr = data.longest_fixed;
1924 r->anchored_offset = data.offset_fixed;
1925 t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */
1926 && (!(data.flags & SF_FIX_BEFORE_MEOL)
1927 || (RExC_flags16 & PMf_MULTILINE)));
1928 fbm_compile(r->anchored_substr, t ? FBMcf_TAIL : 0);
1931 r->anchored_substr = Nullsv;
1932 SvREFCNT_dec(data.longest_fixed);
1933 longest_fixed_length = 0;
1936 && (OP(r->regstclass) == REG_ANY || OP(r->regstclass) == SANY))
1937 r->regstclass = NULL;
1938 if ((!r->anchored_substr || r->anchored_offset) && stclass_flag
1939 && !(data.start_class->flags & ANYOF_EOS)
1940 && !cl_is_anything(data.start_class)) {
1941 I32 n = add_data(pRExC_state, 1, "f");
1943 New(1006, RExC_rx->data->data[n], 1,
1944 struct regnode_charclass_class);
1945 StructCopy(data.start_class,
1946 (struct regnode_charclass_class*)RExC_rx->data->data[n],
1947 struct regnode_charclass_class);
1948 r->regstclass = (regnode*)RExC_rx->data->data[n];
1949 r->reganch &= ~ROPT_SKIP; /* Used in find_byclass(). */
1950 PL_regdata = r->data; /* for regprop() */
1951 DEBUG_r({ SV *sv = sv_newmortal();
1952 regprop(sv, (regnode*)data.start_class);
1953 PerlIO_printf(Perl_debug_log,
1954 "synthetic stclass `%s'.\n",
1958 /* A temporary algorithm prefers floated substr to fixed one to dig more info. */
1959 if (longest_fixed_length > longest_float_length) {
1960 r->check_substr = r->anchored_substr;
1961 r->check_offset_min = r->check_offset_max = r->anchored_offset;
1962 if (r->reganch & ROPT_ANCH_SINGLE)
1963 r->reganch |= ROPT_NOSCAN;
1966 r->check_substr = r->float_substr;
1967 r->check_offset_min = data.offset_float_min;
1968 r->check_offset_max = data.offset_float_max;
1970 /* XXXX Currently intuiting is not compatible with ANCH_GPOS.
1971 This should be changed ASAP! */
1972 if (r->check_substr && !(r->reganch & ROPT_ANCH_GPOS)) {
1973 r->reganch |= RE_USE_INTUIT;
1974 if (SvTAIL(r->check_substr))
1975 r->reganch |= RE_INTUIT_TAIL;
1979 /* Several toplevels. Best we can is to set minlen. */
1981 struct regnode_charclass_class ch_class;
1984 DEBUG_r(PerlIO_printf(Perl_debug_log, "\n"));
1985 scan = r->program + 1;
1986 cl_init(pRExC_state, &ch_class);
1987 data.start_class = &ch_class;
1988 data.last_closep = &last_close;
1989 minlen = study_chunk(pRExC_state, &scan, &fake, scan + RExC_size, &data, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS);
1990 r->check_substr = r->anchored_substr = r->float_substr = Nullsv;
1991 if (!(data.start_class->flags & ANYOF_EOS)
1992 && !cl_is_anything(data.start_class)) {
1993 I32 n = add_data(pRExC_state, 1, "f");
1995 New(1006, RExC_rx->data->data[n], 1,
1996 struct regnode_charclass_class);
1997 StructCopy(data.start_class,
1998 (struct regnode_charclass_class*)RExC_rx->data->data[n],
1999 struct regnode_charclass_class);
2000 r->regstclass = (regnode*)RExC_rx->data->data[n];
2001 r->reganch &= ~ROPT_SKIP; /* Used in find_byclass(). */
2002 DEBUG_r({ SV* sv = sv_newmortal();
2003 regprop(sv, (regnode*)data.start_class);
2004 PerlIO_printf(Perl_debug_log,
2005 "synthetic stclass `%s'.\n",
2011 if (RExC_seen & REG_SEEN_GPOS)
2012 r->reganch |= ROPT_GPOS_SEEN;
2013 if (RExC_seen & REG_SEEN_LOOKBEHIND)
2014 r->reganch |= ROPT_LOOKBEHIND_SEEN;
2015 if (RExC_seen & REG_SEEN_EVAL)
2016 r->reganch |= ROPT_EVAL_SEEN;
2017 if (RExC_seen & REG_SEEN_CANY)
2018 r->reganch |= ROPT_CANY_SEEN;
2019 Newz(1002, r->startp, RExC_npar, I32);
2020 Newz(1002, r->endp, RExC_npar, I32);
2021 PL_regdata = r->data; /* for regprop() */
2022 DEBUG_r(regdump(r));
2027 - reg - regular expression, i.e. main body or parenthesized thing
2029 * Caller must absorb opening parenthesis.
2031 * Combining parenthesis handling with the base level of regular expression
2032 * is a trifle forced, but the need to tie the tails of the branches to what
2033 * follows makes it hard to avoid.
2036 S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp)
2037 /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */
2039 register regnode *ret; /* Will be the head of the group. */
2040 register regnode *br;
2041 register regnode *lastbr;
2042 register regnode *ender = 0;
2043 register I32 parno = 0;
2044 I32 flags, oregflags = RExC_flags16, have_branch = 0, open = 0;
2046 /* for (?g), (?gc), and (?o) warnings; warning
2047 about (?c) will warn about (?g) -- japhy */
2049 I32 wastedflags = 0x00,
2052 wasted_gc = 0x02 | 0x04,
2055 char * parse_start = RExC_parse; /* MJD */
2056 char *oregcomp_parse = RExC_parse;
2059 *flagp = 0; /* Tentatively. */
2062 /* Make an OPEN node, if parenthesized. */
2064 if (*RExC_parse == '?') { /* (?...) */
2065 U16 posflags = 0, negflags = 0;
2066 U16 *flagsp = &posflags;
2068 char *seqstart = RExC_parse;
2071 paren = *RExC_parse++;
2072 ret = NULL; /* For look-ahead/behind. */
2074 case '<': /* (?<...) */
2075 RExC_seen |= REG_SEEN_LOOKBEHIND;
2076 if (*RExC_parse == '!')
2078 if (*RExC_parse != '=' && *RExC_parse != '!')
2081 case '=': /* (?=...) */
2082 case '!': /* (?!...) */
2083 RExC_seen_zerolen++;
2084 case ':': /* (?:...) */
2085 case '>': /* (?>...) */
2087 case '$': /* (?$...) */
2088 case '@': /* (?@...) */
2089 vFAIL2("Sequence (?%c...) not implemented", (int)paren);
2091 case '#': /* (?#...) */
2092 while (*RExC_parse && *RExC_parse != ')')
2094 if (*RExC_parse != ')')
2095 FAIL("Sequence (?#... not terminated");
2096 nextchar(pRExC_state);
2099 case 'p': /* (?p...) */
2100 if (SIZE_ONLY && ckWARN2(WARN_DEPRECATED, WARN_REGEXP))
2101 vWARNdep(RExC_parse, "(?p{}) is deprecated - use (??{})");
2103 case '?': /* (??...) */
2105 paren = *RExC_parse++;
2107 case '{': /* (?{...}) */
2109 I32 count = 1, n = 0;
2111 char *s = RExC_parse;
2113 OP_4tree *sop, *rop;
2115 RExC_seen_zerolen++;
2116 RExC_seen |= REG_SEEN_EVAL;
2117 while (count && (c = *RExC_parse)) {
2118 if (c == '\\' && RExC_parse[1])
2126 if (*RExC_parse != ')')
2129 vFAIL("Sequence (?{...}) not terminated or not {}-balanced");
2134 if (RExC_parse - 1 - s)
2135 sv = newSVpvn(s, RExC_parse - 1 - s);
2137 sv = newSVpvn("", 0);
2140 Perl_save_re_context(aTHX);
2141 rop = sv_compile_2op(sv, &sop, "re", &av);
2142 sop->op_private |= OPpREFCOUNTED;
2143 /* re_dup will OpREFCNT_inc */
2144 OpREFCNT_set(sop, 1);
2147 n = add_data(pRExC_state, 3, "nop");
2148 RExC_rx->data->data[n] = (void*)rop;
2149 RExC_rx->data->data[n+1] = (void*)sop;
2150 RExC_rx->data->data[n+2] = (void*)av;
2153 else { /* First pass */
2154 if (PL_reginterp_cnt < ++RExC_seen_evals
2155 && PL_curcop != &PL_compiling)
2156 /* No compiled RE interpolated, has runtime
2157 components ===> unsafe. */
2158 FAIL("Eval-group not allowed at runtime, use re 'eval'");
2159 if (PL_tainting && PL_tainted)
2160 FAIL("Eval-group in insecure regular expression");
2163 nextchar(pRExC_state);
2165 ret = reg_node(pRExC_state, LOGICAL);
2168 regtail(pRExC_state, ret, reganode(pRExC_state, EVAL, n));
2169 /* deal with the length of this later - MJD */
2172 return reganode(pRExC_state, EVAL, n);
2174 case '(': /* (?(?{...})...) and (?(?=...)...) */
2176 if (RExC_parse[0] == '?') { /* (?(?...)) */
2177 if (RExC_parse[1] == '=' || RExC_parse[1] == '!'
2178 || RExC_parse[1] == '<'
2179 || RExC_parse[1] == '{') { /* Lookahead or eval. */
2182 ret = reg_node(pRExC_state, LOGICAL);
2185 regtail(pRExC_state, ret, reg(pRExC_state, 1, &flag));
2189 else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
2191 parno = atoi(RExC_parse++);
2193 while (isDIGIT(*RExC_parse))
2195 ret = reganode(pRExC_state, GROUPP, parno);
2197 if ((c = *nextchar(pRExC_state)) != ')')
2198 vFAIL("Switch condition not recognized");
2200 regtail(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0));
2201 br = regbranch(pRExC_state, &flags, 1);
2203 br = reganode(pRExC_state, LONGJMP, 0);
2205 regtail(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0));
2206 c = *nextchar(pRExC_state);
2210 lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */
2211 regbranch(pRExC_state, &flags, 1);
2212 regtail(pRExC_state, ret, lastbr);
2215 c = *nextchar(pRExC_state);
2220 vFAIL("Switch (?(condition)... contains too many branches");
2221 ender = reg_node(pRExC_state, TAIL);
2222 regtail(pRExC_state, br, ender);
2224 regtail(pRExC_state, lastbr, ender);
2225 regtail(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender);
2228 regtail(pRExC_state, ret, ender);
2232 vFAIL2("Unknown switch condition (?(%.2s", RExC_parse);
2236 RExC_parse--; /* for vFAIL to print correctly */
2237 vFAIL("Sequence (? incomplete");
2241 parse_flags: /* (?i) */
2242 while (*RExC_parse && strchr("iogcmsx", *RExC_parse)) {
2243 /* (?g), (?gc) and (?o) are useless here
2244 and must be globally applied -- japhy */
2246 if (*RExC_parse == 'o' || *RExC_parse == 'g') {
2247 if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
2248 I32 wflagbit = *RExC_parse == 'o' ? wasted_o : wasted_g;
2249 if (! (wastedflags & wflagbit) ) {
2250 wastedflags |= wflagbit;
2253 "Useless (%s%c) - %suse /%c modifier",
2254 flagsp == &negflags ? "?-" : "?",
2256 flagsp == &negflags ? "don't " : "",
2262 else if (*RExC_parse == 'c') {
2263 if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
2264 if (! (wastedflags & wasted_c) ) {
2265 wastedflags |= wasted_gc;
2268 "Useless (%sc) - %suse /gc modifier",
2269 flagsp == &negflags ? "?-" : "?",
2270 flagsp == &negflags ? "don't " : ""
2275 else { pmflag(flagsp, *RExC_parse); }
2279 if (*RExC_parse == '-') {
2281 wastedflags = 0; /* reset so (?g-c) warns twice */
2285 RExC_flags16 |= posflags;
2286 RExC_flags16 &= ~negflags;
2287 if (*RExC_parse == ':') {
2293 if (*RExC_parse != ')') {
2295 vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
2297 nextchar(pRExC_state);
2305 ret = reganode(pRExC_state, OPEN, parno);
2306 Set_Node_Length(ret, 1); /* MJD */
2307 Set_Node_Offset(ret, RExC_parse); /* MJD */
2314 /* Pick up the branches, linking them together. */
2315 parse_start = RExC_parse; /* MJD */
2316 br = regbranch(pRExC_state, &flags, 1);
2317 /* branch_len = (paren != 0); */
2321 if (*RExC_parse == '|') {
2322 if (!SIZE_ONLY && RExC_extralen) {
2323 reginsert(pRExC_state, BRANCHJ, br);
2326 reginsert(pRExC_state, BRANCH, br);
2327 Set_Node_Length(br, paren != 0);
2328 Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start);
2332 RExC_extralen += 1; /* For BRANCHJ-BRANCH. */
2334 else if (paren == ':') {
2335 *flagp |= flags&SIMPLE;
2337 if (open) { /* Starts with OPEN. */
2338 regtail(pRExC_state, ret, br); /* OPEN -> first. */
2340 else if (paren != '?') /* Not Conditional */
2344 *flagp |= flags&SPSTART;
2346 while (*RExC_parse == '|') {
2347 if (!SIZE_ONLY && RExC_extralen) {
2348 ender = reganode(pRExC_state, LONGJMP,0);
2349 regtail(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */
2352 RExC_extralen += 2; /* Account for LONGJMP. */
2353 nextchar(pRExC_state);
2354 br = regbranch(pRExC_state, &flags, 0);
2358 regtail(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */
2362 *flagp |= flags&SPSTART;
2365 if (have_branch || paren != ':') {
2366 /* Make a closing node, and hook it on the end. */
2369 ender = reg_node(pRExC_state, TAIL);
2372 ender = reganode(pRExC_state, CLOSE, parno);
2373 Set_Node_Offset(ender,RExC_parse+1); /* MJD */
2374 Set_Node_Length(ender,1); /* MJD */
2380 *flagp &= ~HASWIDTH;
2383 ender = reg_node(pRExC_state, SUCCEED);
2386 ender = reg_node(pRExC_state, END);
2389 regtail(pRExC_state, lastbr, ender);
2392 /* Hook the tails of the branches to the closing node. */
2393 for (br = ret; br != NULL; br = regnext(br)) {
2394 regoptail(pRExC_state, br, ender);
2401 static char parens[] = "=!<,>";
2403 if (paren && (p = strchr(parens, paren))) {
2404 int node = ((p - parens) % 2) ? UNLESSM : IFMATCH;
2405 int flag = (p - parens) > 1;
2408 node = SUSPEND, flag = 0;
2409 reginsert(pRExC_state, node,ret);
2411 regtail(pRExC_state, ret, reg_node(pRExC_state, TAIL));
2415 /* Check for proper termination. */
2417 RExC_flags16 = oregflags;
2418 if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') {
2419 RExC_parse = oregcomp_parse;
2420 vFAIL("Unmatched (");
2423 else if (!paren && RExC_parse < RExC_end) {
2424 if (*RExC_parse == ')') {
2426 vFAIL("Unmatched )");
2429 FAIL("Junk on end of regexp"); /* "Can't happen". */
2437 - regbranch - one alternative of an | operator
2439 * Implements the concatenation operator.
2442 S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first)
2444 register regnode *ret;
2445 register regnode *chain = NULL;
2446 register regnode *latest;
2447 I32 flags = 0, c = 0;
2452 if (!SIZE_ONLY && RExC_extralen)
2453 ret = reganode(pRExC_state, BRANCHJ,0);
2455 ret = reg_node(pRExC_state, BRANCH);
2456 Set_Node_Length(ret, 1);
2460 if (!first && SIZE_ONLY)
2461 RExC_extralen += 1; /* BRANCHJ */
2463 *flagp = WORST; /* Tentatively. */
2466 nextchar(pRExC_state);
2467 while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') {
2469 latest = regpiece(pRExC_state, &flags);
2470 if (latest == NULL) {
2471 if (flags & TRYAGAIN)
2475 else if (ret == NULL)
2477 *flagp |= flags&HASWIDTH;
2478 if (chain == NULL) /* First piece. */
2479 *flagp |= flags&SPSTART;
2482 regtail(pRExC_state, chain, latest);
2487 if (chain == NULL) { /* Loop ran zero times. */
2488 chain = reg_node(pRExC_state, NOTHING);
2493 *flagp |= flags&SIMPLE;
2500 - regpiece - something followed by possible [*+?]
2502 * Note that the branching code sequences used for ? and the general cases
2503 * of * and + are somewhat optimized: they use the same NOTHING node as
2504 * both the endmarker for their branch list and the body of the last branch.
2505 * It might seem that this node could be dispensed with entirely, but the
2506 * endmarker role is not redundant.
2509 S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp)
2511 register regnode *ret;
2513 register char *next;
2515 char *origparse = RExC_parse;
2518 I32 max = REG_INFTY;
2521 ret = regatom(pRExC_state, &flags);
2523 if (flags & TRYAGAIN)
2530 if (op == '{' && regcurly(RExC_parse)) {
2531 parse_start = RExC_parse; /* MJD */
2532 next = RExC_parse + 1;
2534 while (isDIGIT(*next) || *next == ',') {
2543 if (*next == '}') { /* got one */
2547 min = atoi(RExC_parse);
2551 maxpos = RExC_parse;
2553 if (!max && *maxpos != '0')
2554 max = REG_INFTY; /* meaning "infinity" */
2555 else if (max >= REG_INFTY)
2556 vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1);
2558 nextchar(pRExC_state);
2561 if ((flags&SIMPLE)) {
2562 RExC_naughty += 2 + RExC_naughty / 2;
2563 reginsert(pRExC_state, CURLY, ret);
2564 Set_Node_Offset(ret, parse_start+1); /* MJD */
2565 Set_Node_Cur_Length(ret);
2568 regnode *w = reg_node(pRExC_state, WHILEM);
2571 regtail(pRExC_state, ret, w);
2572 if (!SIZE_ONLY && RExC_extralen) {
2573 reginsert(pRExC_state, LONGJMP,ret);
2574 reginsert(pRExC_state, NOTHING,ret);
2575 NEXT_OFF(ret) = 3; /* Go over LONGJMP. */
2577 reginsert(pRExC_state, CURLYX,ret);
2579 Set_Node_Offset(ret, parse_start+1);
2580 Set_Node_Length(ret,
2581 op == '{' ? (RExC_parse - parse_start) : 1);
2583 if (!SIZE_ONLY && RExC_extralen)
2584 NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */
2585 regtail(pRExC_state, ret, reg_node(pRExC_state, NOTHING));
2587 RExC_whilem_seen++, RExC_extralen += 3;
2588 RExC_naughty += 4 + RExC_naughty; /* compound interest */
2596 if (max && max < min)
2597 vFAIL("Can't do {n,m} with n > m");
2612 #if 0 /* Now runtime fix should be reliable. */
2614 /* if this is reinstated, don't forget to put this back into perldiag:
2616 =item Regexp *+ operand could be empty at {#} in regex m/%s/
2618 (F) The part of the regexp subject to either the * or + quantifier
2619 could match an empty string. The {#} shows in the regular
2620 expression about where the problem was discovered.
2624 if (!(flags&HASWIDTH) && op != '?')
2625 vFAIL("Regexp *+ operand could be empty");
2628 parse_start = RExC_parse;
2629 nextchar(pRExC_state);
2631 *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH);
2633 if (op == '*' && (flags&SIMPLE)) {
2634 reginsert(pRExC_state, STAR, ret);
2638 else if (op == '*') {
2642 else if (op == '+' && (flags&SIMPLE)) {
2643 reginsert(pRExC_state, PLUS, ret);
2647 else if (op == '+') {
2651 else if (op == '?') {
2656 if (ckWARN(WARN_REGEXP) && !SIZE_ONLY && !(flags&HASWIDTH) && max > REG_INFTY/3) {
2658 "%.*s matches null string many times",
2659 RExC_parse - origparse,
2663 if (*RExC_parse == '?') {
2664 nextchar(pRExC_state);
2665 reginsert(pRExC_state, MINMOD, ret);
2666 regtail(pRExC_state, ret, ret + NODE_STEP_REGNODE);
2668 if (ISMULT2(RExC_parse)) {
2670 vFAIL("Nested quantifiers");
2677 - regatom - the lowest level
2679 * Optimization: gobbles an entire sequence of ordinary characters so that
2680 * it can turn them into a single node, which is smaller to store and
2681 * faster to run. Backslashed characters are exceptions, each becoming a
2682 * separate node; the code is simpler that way and it's not worth fixing.
2684 * [Yes, it is worth fixing, some scripts can run twice the speed.] */
2686 S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp)
2688 register regnode *ret = 0;
2690 char *parse_start = 0;
2692 *flagp = WORST; /* Tentatively. */
2695 switch (*RExC_parse) {
2697 RExC_seen_zerolen++;
2698 nextchar(pRExC_state);
2699 if (RExC_flags16 & PMf_MULTILINE)
2700 ret = reg_node(pRExC_state, MBOL);
2701 else if (RExC_flags16 & PMf_SINGLELINE)
2702 ret = reg_node(pRExC_state, SBOL);
2704 ret = reg_node(pRExC_state, BOL);
2705 Set_Node_Length(ret, 1); /* MJD */
2708 nextchar(pRExC_state);
2710 RExC_seen_zerolen++;
2711 if (RExC_flags16 & PMf_MULTILINE)
2712 ret = reg_node(pRExC_state, MEOL);
2713 else if (RExC_flags16 & PMf_SINGLELINE)
2714 ret = reg_node(pRExC_state, SEOL);
2716 ret = reg_node(pRExC_state, EOL);
2717 Set_Node_Length(ret, 1); /* MJD */
2720 nextchar(pRExC_state);
2721 if (RExC_flags16 & PMf_SINGLELINE)
2722 ret = reg_node(pRExC_state, SANY);
2724 ret = reg_node(pRExC_state, REG_ANY);
2725 *flagp |= HASWIDTH|SIMPLE;
2727 Set_Node_Length(ret, 1); /* MJD */
2731 char *oregcomp_parse = ++RExC_parse;
2732 ret = regclass(pRExC_state);
2733 if (*RExC_parse != ']') {
2734 RExC_parse = oregcomp_parse;
2735 vFAIL("Unmatched [");
2737 nextchar(pRExC_state);
2738 *flagp |= HASWIDTH|SIMPLE;
2739 Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */
2743 nextchar(pRExC_state);
2744 ret = reg(pRExC_state, 1, &flags);
2746 if (flags & TRYAGAIN) {
2747 if (RExC_parse == RExC_end) {
2748 /* Make parent create an empty node if needed. */
2756 *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE);
2760 if (flags & TRYAGAIN) {
2764 vFAIL("Internal urp");
2765 /* Supposed to be caught earlier. */
2768 if (!regcurly(RExC_parse)) {
2777 vFAIL("Quantifier follows nothing");
2780 switch (*++RExC_parse) {
2782 RExC_seen_zerolen++;
2783 ret = reg_node(pRExC_state, SBOL);
2785 nextchar(pRExC_state);
2786 Set_Node_Length(ret, 2); /* MJD */
2789 ret = reg_node(pRExC_state, GPOS);
2790 RExC_seen |= REG_SEEN_GPOS;
2792 nextchar(pRExC_state);
2793 Set_Node_Length(ret, 2); /* MJD */
2796 ret = reg_node(pRExC_state, SEOL);
2798 nextchar(pRExC_state);
2801 ret = reg_node(pRExC_state, EOS);
2803 RExC_seen_zerolen++; /* Do not optimize RE away */
2804 nextchar(pRExC_state);
2805 Set_Node_Length(ret, 2); /* MJD */
2808 ret = reg_node(pRExC_state, CANY);
2809 RExC_seen |= REG_SEEN_CANY;
2810 *flagp |= HASWIDTH|SIMPLE;
2811 nextchar(pRExC_state);
2812 Set_Node_Length(ret, 2); /* MJD */
2815 ret = reg_node(pRExC_state, CLUMP);
2817 nextchar(pRExC_state);
2818 Set_Node_Length(ret, 2); /* MJD */
2821 ret = reg_node(pRExC_state, LOC ? ALNUML : ALNUM);
2822 *flagp |= HASWIDTH|SIMPLE;
2823 nextchar(pRExC_state);
2824 Set_Node_Length(ret, 2); /* MJD */
2827 ret = reg_node(pRExC_state, LOC ? NALNUML : NALNUM);
2828 *flagp |= HASWIDTH|SIMPLE;
2829 nextchar(pRExC_state);
2830 Set_Node_Length(ret, 2); /* MJD */
2833 RExC_seen_zerolen++;
2834 RExC_seen |= REG_SEEN_LOOKBEHIND;
2835 ret = reg_node(pRExC_state, LOC ? BOUNDL : BOUND);
2837 nextchar(pRExC_state);
2838 Set_Node_Length(ret, 2); /* MJD */
2841 RExC_seen_zerolen++;
2842 RExC_seen |= REG_SEEN_LOOKBEHIND;
2843 ret = reg_node(pRExC_state, LOC ? NBOUNDL : NBOUND);
2845 nextchar(pRExC_state);
2846 Set_Node_Length(ret, 2); /* MJD */
2849 ret = reg_node(pRExC_state, LOC ? SPACEL : SPACE);
2850 *flagp |= HASWIDTH|SIMPLE;
2851 nextchar(pRExC_state);
2852 Set_Node_Length(ret, 2); /* MJD */
2855 ret = reg_node(pRExC_state, LOC ? NSPACEL : NSPACE);
2856 *flagp |= HASWIDTH|SIMPLE;
2857 nextchar(pRExC_state);
2858 Set_Node_Length(ret, 2); /* MJD */
2861 ret = reg_node(pRExC_state, DIGIT);
2862 *flagp |= HASWIDTH|SIMPLE;
2863 nextchar(pRExC_state);
2864 Set_Node_Length(ret, 2); /* MJD */
2867 ret = reg_node(pRExC_state, NDIGIT);
2868 *flagp |= HASWIDTH|SIMPLE;
2869 nextchar(pRExC_state);
2870 Set_Node_Length(ret, 2); /* MJD */
2875 char* oldregxend = RExC_end;
2876 char* parse_start = RExC_parse;
2878 if (RExC_parse[1] == '{') {
2879 /* a lovely hack--pretend we saw [\pX] instead */
2880 RExC_end = strchr(RExC_parse, '}');
2883 RExC_end = oldregxend;
2884 vFAIL("Missing right brace on \\p{}");
2889 RExC_end = RExC_parse + 2;
2892 ret = regclass(pRExC_state);
2894 RExC_end = oldregxend;
2896 Set_Node_Cur_Length(ret); /* MJD */
2897 nextchar(pRExC_state);
2898 *flagp |= HASWIDTH|SIMPLE;
2911 case '1': case '2': case '3': case '4':
2912 case '5': case '6': case '7': case '8': case '9':
2914 I32 num = atoi(RExC_parse);
2916 if (num > 9 && num >= RExC_npar)
2919 char * parse_start = RExC_parse - 1; /* MJD */
2920 while (isDIGIT(*RExC_parse))
2923 if (!SIZE_ONLY && num > RExC_rx->nparens)
2924 vFAIL("Reference to nonexistent group");
2926 ret = reganode(pRExC_state, FOLD
2927 ? (LOC ? REFFL : REFF)
2931 /* override incorrect value set in reganode MJD */
2932 Set_Node_Offset(ret, parse_start+1);
2933 Set_Node_Cur_Length(ret); /* MJD */
2935 nextchar(pRExC_state);
2940 if (RExC_parse >= RExC_end)
2941 FAIL("Trailing \\");
2944 /* Do not generate `unrecognized' warnings here, we fall
2945 back into the quick-grab loop below */
2951 if (RExC_flags16 & PMf_EXTENDED) {
2952 while (RExC_parse < RExC_end && *RExC_parse != '\n') RExC_parse++;
2953 if (RExC_parse < RExC_end)
2959 register STRLEN len;
2965 parse_start = RExC_parse - 1;
2970 ret = reg_node(pRExC_state, FOLD
2971 ? (LOC ? EXACTFL : EXACTF)
2974 for (len = 0, p = RExC_parse - 1;
2975 len < 127 && p < RExC_end;
2980 if (RExC_flags16 & PMf_EXTENDED)
2981 p = regwhite(p, RExC_end);
3026 ender = ASCII_TO_NATIVE('\033');
3030 ender = ASCII_TO_NATIVE('\007');
3035 char* e = strchr(p, '}');
3039 vFAIL("Missing right brace on \\x{}");
3042 numlen = 1; /* allow underscores */
3043 ender = (UV)scan_hex(p + 1, e - p - 1, &numlen);
3046 /* numlen is generous */
3047 if (numlen + len >= 127) {
3055 numlen = 0; /* disallow underscores */
3056 ender = (UV)scan_hex(p, 2, &numlen);
3062 ender = UCHARAT(p++);
3063 ender = toCTRL(ender);
3065 case '0': case '1': case '2': case '3':case '4':
3066 case '5': case '6': case '7': case '8':case '9':
3068 (isDIGIT(p[1]) && atoi(p) >= RExC_npar) ) {
3069 numlen = 0; /* disallow underscores */
3070 ender = (UV)scan_oct(p, 3, &numlen);
3080 FAIL("Trailing \\");
3083 if (!SIZE_ONLY && ckWARN(WARN_REGEXP) && isALPHA(*p))
3084 vWARN2(p +1, "Unrecognized escape \\%c passed through", *p);
3085 goto normal_default;
3090 if (UTF8_IS_START(*p) && UTF) {
3091 ender = utf8n_to_uvchr((U8*)p, RExC_end - p,
3099 if (RExC_flags16 & PMf_EXTENDED)
3100 p = regwhite(p, RExC_end);
3103 ender = toLOWER_LC_uvchr(ender);
3105 ender = toLOWER_uni(ender);
3107 if (ISMULT2(p)) { /* Back off on ?+*. */
3110 else if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(ender)) && UTF) {
3111 reguni(pRExC_state, ender, s, &numlen);
3121 if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(ender)) && UTF) {
3122 reguni(pRExC_state, ender, s, &numlen);
3131 Set_Node_Cur_Length(ret); /* MJD */
3132 nextchar(pRExC_state);
3134 /* len is STRLEN which is unsigned, need to copy to signed */
3137 vFAIL("Internal disaster");
3146 RExC_size += STR_SZ(len);
3148 RExC_emit += STR_SZ(len);
3157 S_regwhite(pTHX_ char *p, char *e)
3162 else if (*p == '#') {
3165 } while (p < e && *p != '\n');
3173 /* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]].
3174 Character classes ([:foo:]) can also be negated ([:^foo:]).
3175 Returns a named class id (ANYOF_XXX) if successful, -1 otherwise.
3176 Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed,
3177 but trigger warnings because they are currently unimplemented. */
3179 S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value)
3182 I32 namedclass = OOB_NAMEDCLASS;
3184 if (value == '[' && RExC_parse + 1 < RExC_end &&
3185 /* I smell either [: or [= or [. -- POSIX has been here, right? */
3186 (*RExC_parse == ':' ||
3187 *RExC_parse == '=' ||
3188 *RExC_parse == '.')) {
3189 char c = *RExC_parse;
3190 char* s = RExC_parse++;
3192 while (RExC_parse < RExC_end && *RExC_parse != c)
3194 if (RExC_parse == RExC_end)
3195 /* Grandfather lone [:, [=, [. */
3198 char* t = RExC_parse++; /* skip over the c */
3200 if (*RExC_parse == ']') {
3201 RExC_parse++; /* skip over the ending ] */
3204 I32 complement = *posixcc == '^' ? *posixcc++ : 0;
3205 I32 skip = 5; /* the most common skip */
3209 if (strnEQ(posixcc, "alnum", 5))
3211 complement ? ANYOF_NALNUMC : ANYOF_ALNUMC;
3212 else if (strnEQ(posixcc, "alpha", 5))
3214 complement ? ANYOF_NALPHA : ANYOF_ALPHA;
3215 else if (strnEQ(posixcc, "ascii", 5))
3217 complement ? ANYOF_NASCII : ANYOF_ASCII;
3220 if (strnEQ(posixcc, "blank", 5))
3222 complement ? ANYOF_NBLANK : ANYOF_BLANK;
3225 if (strnEQ(posixcc, "cntrl", 5))
3227 complement ? ANYOF_NCNTRL : ANYOF_CNTRL;
3230 if (strnEQ(posixcc, "digit", 5))
3232 complement ? ANYOF_NDIGIT : ANYOF_DIGIT;
3235 if (strnEQ(posixcc, "graph", 5))
3237 complement ? ANYOF_NGRAPH : ANYOF_GRAPH;
3240 if (strnEQ(posixcc, "lower", 5))
3242 complement ? ANYOF_NLOWER : ANYOF_LOWER;
3245 if (strnEQ(posixcc, "print", 5))
3247 complement ? ANYOF_NPRINT : ANYOF_PRINT;
3248 else if (strnEQ(posixcc, "punct", 5))
3250 complement ? ANYOF_NPUNCT : ANYOF_PUNCT;
3253 if (strnEQ(posixcc, "space", 5))
3255 complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC;
3258 if (strnEQ(posixcc, "upper", 5))
3260 complement ? ANYOF_NUPPER : ANYOF_UPPER;
3262 case 'w': /* this is not POSIX, this is the Perl \w */
3263 if (strnEQ(posixcc, "word", 4)) {
3265 complement ? ANYOF_NALNUM : ANYOF_ALNUM;
3270 if (strnEQ(posixcc, "xdigit", 6)) {
3272 complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT;
3277 if (namedclass == OOB_NAMEDCLASS ||
3278 posixcc[skip] != ':' ||
3279 posixcc[skip+1] != ']')
3281 Simple_vFAIL3("POSIX class [:%.*s:] unknown",
3284 } else if (!SIZE_ONLY) {
3285 /* [[=foo=]] and [[.foo.]] are still future. */
3287 /* adjust RExC_parse so the warning shows after
3289 while (*RExC_parse && *RExC_parse != ']')
3291 Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
3294 /* Maternal grandfather:
3295 * "[:" ending in ":" but not in ":]" */
3305 S_checkposixcc(pTHX_ RExC_state_t *pRExC_state)
3307 if (!SIZE_ONLY && ckWARN(WARN_REGEXP) &&
3308 (*RExC_parse == ':' ||
3309 *RExC_parse == '=' ||
3310 *RExC_parse == '.')) {
3311 char *s = RExC_parse;
3314 while(*s && isALNUM(*s))
3316 if (*s && c == *s && s[1] == ']') {
3317 vWARN3(s+2, "POSIX syntax [%c %c] belongs inside character classes", c, c);
3319 /* [[=foo=]] and [[.foo.]] are still future. */
3320 if (c == '=' || c == '.')
3322 /* adjust RExC_parse so the error shows after
3324 while (*RExC_parse && *RExC_parse++ != ']')
3326 Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
3333 S_regclass(pTHX_ RExC_state_t *pRExC_state)
3336 register IV prevvalue = OOB_UNICODE;
3337 register IV range = 0;
3338 register regnode *ret;
3341 char *rangebegin = 0;
3342 bool need_class = 0;
3343 SV *listsv = Nullsv;
3346 bool optimize_invert = TRUE;
3348 ret = reganode(pRExC_state, ANYOF, 0);
3351 ANYOF_FLAGS(ret) = 0;
3353 if (*RExC_parse == '^') { /* Complement of range. */
3357 ANYOF_FLAGS(ret) |= ANYOF_INVERT;
3361 RExC_size += ANYOF_SKIP;
3363 RExC_emit += ANYOF_SKIP;
3365 ANYOF_FLAGS(ret) |= ANYOF_FOLD;
3367 ANYOF_FLAGS(ret) |= ANYOF_LOCALE;
3368 ANYOF_BITMAP_ZERO(ret);
3369 listsv = newSVpvn("# comment\n", 10);
3372 if (!SIZE_ONLY && ckWARN(WARN_REGEXP))
3373 checkposixcc(pRExC_state);
3375 if (*RExC_parse == ']' || *RExC_parse == '-')
3376 goto charclassloop; /* allow 1st char to be ] or - */
3378 while (RExC_parse < RExC_end && *RExC_parse != ']') {
3382 namedclass = OOB_NAMEDCLASS; /* initialize as illegal */
3385 rangebegin = RExC_parse;
3387 value = utf8n_to_uvchr((U8*)RExC_parse,
3388 RExC_end - RExC_parse,
3390 RExC_parse += numlen;
3393 value = UCHARAT(RExC_parse++);
3395 namedclass = regpposixcc(pRExC_state, value);
3396 else if (value == '\\') {
3398 value = utf8n_to_uvchr((U8*)RExC_parse,
3399 RExC_end - RExC_parse,
3401 RExC_parse += numlen;
3404 value = UCHARAT(RExC_parse++);
3405 /* Some compilers cannot handle switching on 64-bit integer
3406 * values, therefore value cannot be an UV. Yes, this will
3407 * be a problem later if we want switch on Unicode.
3408 * A similar issue a little bit later when switching on
3409 * namedclass. --jhi */
3410 switch ((I32)value) {
3411 case 'w': namedclass = ANYOF_ALNUM; break;
3412 case 'W': namedclass = ANYOF_NALNUM; break;
3413 case 's': namedclass = ANYOF_SPACE; break;
3414 case 'S': namedclass = ANYOF_NSPACE; break;
3415 case 'd': namedclass = ANYOF_DIGIT; break;
3416 case 'D': namedclass = ANYOF_NDIGIT; break;
3419 if (*RExC_parse == '{') {
3420 e = strchr(RExC_parse++, '}');
3422 vFAIL("Missing right brace on \\p{}");
3431 Perl_sv_catpvf(aTHX_ listsv,
3432 "+utf8::%.*s\n", (int)n, RExC_parse);
3434 Perl_sv_catpvf(aTHX_ listsv,
3435 "!utf8::%.*s\n", (int)n, RExC_parse);
3438 ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
3440 case 'n': value = '\n'; break;
3441 case 'r': value = '\r'; break;
3442 case 't': value = '\t'; break;
3443 case 'f': value = '\f'; break;
3444 case 'b': value = '\b'; break;
3445 case 'e': value = ASCII_TO_NATIVE('\033');break;
3446 case 'a': value = ASCII_TO_NATIVE('\007');break;
3448 if (*RExC_parse == '{') {
3449 e = strchr(RExC_parse++, '}');
3451 vFAIL("Missing right brace on \\x{}");
3452 numlen = 1; /* allow underscores */
3453 value = (UV)scan_hex(RExC_parse,
3459 numlen = 0; /* disallow underscores */
3460 value = (UV)scan_hex(RExC_parse, 2, &numlen);
3461 RExC_parse += numlen;
3465 value = UCHARAT(RExC_parse++);
3466 value = toCTRL(value);
3468 case '0': case '1': case '2': case '3': case '4':
3469 case '5': case '6': case '7': case '8': case '9':
3470 numlen = 0; /* disallow underscores */
3471 value = (UV)scan_oct(--RExC_parse, 3, &numlen);
3472 RExC_parse += numlen;
3475 if (!SIZE_ONLY && ckWARN(WARN_REGEXP) && isALPHA(value))
3477 "Unrecognized escape \\%c in character class passed through",
3481 } /* end of \blah */
3483 if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */
3485 if (!SIZE_ONLY && !need_class)
3486 ANYOF_CLASS_ZERO(ret);
3490 /* a bad range like a-\d, a-[:digit:] ? */
3493 if (ckWARN(WARN_REGEXP))
3495 "False [] range \"%*.*s\"",
3496 RExC_parse - rangebegin,
3497 RExC_parse - rangebegin,
3499 if (prevvalue < 256) {
3500 ANYOF_BITMAP_SET(ret, prevvalue);
3501 ANYOF_BITMAP_SET(ret, '-');
3504 ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
3505 Perl_sv_catpvf(aTHX_ listsv,
3506 "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-');
3510 range = 0; /* this was not a true range */
3514 if (namedclass > OOB_NAMEDCLASS)
3515 optimize_invert = FALSE;
3516 /* Possible truncation here but in some 64-bit environments
3517 * the compiler gets heartburn about switch on 64-bit values.
3518 * A similar issue a little earlier when switching on value.
3520 switch ((I32)namedclass) {
3523 ANYOF_CLASS_SET(ret, ANYOF_ALNUM);
3525 for (value = 0; value < 256; value++)
3527 ANYOF_BITMAP_SET(ret, value);
3529 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsWord\n");
3533 ANYOF_CLASS_SET(ret, ANYOF_NALNUM);
3535 for (value = 0; value < 256; value++)
3536 if (!isALNUM(value))
3537 ANYOF_BITMAP_SET(ret, value);
3539 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsWord\n");
3543 ANYOF_CLASS_SET(ret, ANYOF_ALNUMC);
3545 for (value = 0; value < 256; value++)
3546 if (isALNUMC(value))
3547 ANYOF_BITMAP_SET(ret, value);
3549 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsAlnum\n");
3553 ANYOF_CLASS_SET(ret, ANYOF_NALNUMC);
3555 for (value = 0; value < 256; value++)
3556 if (!isALNUMC(value))
3557 ANYOF_BITMAP_SET(ret, value);
3559 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsAlnum\n");
3563 ANYOF_CLASS_SET(ret, ANYOF_ALPHA);
3565 for (value = 0; value < 256; value++)
3567 ANYOF_BITMAP_SET(ret, value);
3569 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsAlpha\n");
3573 ANYOF_CLASS_SET(ret, ANYOF_NALPHA);
3575 for (value = 0; value < 256; value++)
3576 if (!isALPHA(value))
3577 ANYOF_BITMAP_SET(ret, value);
3579 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsAlpha\n");
3583 ANYOF_CLASS_SET(ret, ANYOF_ASCII);
3586 for (value = 0; value < 128; value++)
3587 ANYOF_BITMAP_SET(ret, value);
3589 for (value = 0; value < 256; value++) {
3591 ANYOF_BITMAP_SET(ret, value);
3595 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsASCII\n");
3599 ANYOF_CLASS_SET(ret, ANYOF_NASCII);
3602 for (value = 128; value < 256; value++)
3603 ANYOF_BITMAP_SET(ret, value);
3605 for (value = 0; value < 256; value++) {
3606 if (!isASCII(value))
3607 ANYOF_BITMAP_SET(ret, value);
3611 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsASCII\n");
3615 ANYOF_CLASS_SET(ret, ANYOF_BLANK);
3617 for (value = 0; value < 256; value++)
3619 ANYOF_BITMAP_SET(ret, value);
3621 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsBlank\n");
3625 ANYOF_CLASS_SET(ret, ANYOF_NBLANK);
3627 for (value = 0; value < 256; value++)
3628 if (!isBLANK(value))
3629 ANYOF_BITMAP_SET(ret, value);
3631 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsBlank\n");
3635 ANYOF_CLASS_SET(ret, ANYOF_CNTRL);
3637 for (value = 0; value < 256; value++)
3639 ANYOF_BITMAP_SET(ret, value);
3641 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsCntrl\n");
3645 ANYOF_CLASS_SET(ret, ANYOF_NCNTRL);
3647 for (value = 0; value < 256; value++)
3648 if (!isCNTRL(value))
3649 ANYOF_BITMAP_SET(ret, value);
3651 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsCntrl\n");
3655 ANYOF_CLASS_SET(ret, ANYOF_DIGIT);
3657 /* consecutive digits assumed */
3658 for (value = '0'; value <= '9'; value++)
3659 ANYOF_BITMAP_SET(ret, value);
3661 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsDigit\n");
3665 ANYOF_CLASS_SET(ret, ANYOF_NDIGIT);
3667 /* consecutive digits assumed */
3668 for (value = 0; value < '0'; value++)
3669 ANYOF_BITMAP_SET(ret, value);
3670 for (value = '9' + 1; value < 256; value++)
3671 ANYOF_BITMAP_SET(ret, value);
3673 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsDigit\n");
3677 ANYOF_CLASS_SET(ret, ANYOF_GRAPH);
3679 for (value = 0; value < 256; value++)
3681 ANYOF_BITMAP_SET(ret, value);
3683 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsGraph\n");
3687 ANYOF_CLASS_SET(ret, ANYOF_NGRAPH);
3689 for (value = 0; value < 256; value++)
3690 if (!isGRAPH(value))
3691 ANYOF_BITMAP_SET(ret, value);
3693 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsGraph\n");
3697 ANYOF_CLASS_SET(ret, ANYOF_LOWER);
3699 for (value = 0; value < 256; value++)
3701 ANYOF_BITMAP_SET(ret, value);
3703 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsLower\n");
3707 ANYOF_CLASS_SET(ret, ANYOF_NLOWER);
3709 for (value = 0; value < 256; value++)
3710 if (!isLOWER(value))
3711 ANYOF_BITMAP_SET(ret, value);
3713 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsLower\n");
3717 ANYOF_CLASS_SET(ret, ANYOF_PRINT);
3719 for (value = 0; value < 256; value++)
3721 ANYOF_BITMAP_SET(ret, value);
3723 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsPrint\n");
3727 ANYOF_CLASS_SET(ret, ANYOF_NPRINT);
3729 for (value = 0; value < 256; value++)
3730 if (!isPRINT(value))
3731 ANYOF_BITMAP_SET(ret, value);
3733 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsPrint\n");
3737 ANYOF_CLASS_SET(ret, ANYOF_PSXSPC);
3739 for (value = 0; value < 256; value++)
3740 if (isPSXSPC(value))
3741 ANYOF_BITMAP_SET(ret, value);
3743 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsSpace\n");
3747 ANYOF_CLASS_SET(ret, ANYOF_NPSXSPC);
3749 for (value = 0; value < 256; value++)
3750 if (!isPSXSPC(value))
3751 ANYOF_BITMAP_SET(ret, value);
3753 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsSpace\n");
3757 ANYOF_CLASS_SET(ret, ANYOF_PUNCT);
3759 for (value = 0; value < 256; value++)
3761 ANYOF_BITMAP_SET(ret, value);
3763 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsPunct\n");
3767 ANYOF_CLASS_SET(ret, ANYOF_NPUNCT);
3769 for (value = 0; value < 256; value++)
3770 if (!isPUNCT(value))
3771 ANYOF_BITMAP_SET(ret, value);
3773 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsPunct\n");
3777 ANYOF_CLASS_SET(ret, ANYOF_SPACE);
3779 for (value = 0; value < 256; value++)
3781 ANYOF_BITMAP_SET(ret, value);
3783 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsSpacePerl\n");
3787 ANYOF_CLASS_SET(ret, ANYOF_NSPACE);
3789 for (value = 0; value < 256; value++)
3790 if (!isSPACE(value))
3791 ANYOF_BITMAP_SET(ret, value);
3793 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsSpacePerl\n");
3797 ANYOF_CLASS_SET(ret, ANYOF_UPPER);
3799 for (value = 0; value < 256; value++)
3801 ANYOF_BITMAP_SET(ret, value);
3803 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsUpper\n");
3807 ANYOF_CLASS_SET(ret, ANYOF_NUPPER);
3809 for (value = 0; value < 256; value++)
3810 if (!isUPPER(value))
3811 ANYOF_BITMAP_SET(ret, value);
3813 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsUpper\n");
3817 ANYOF_CLASS_SET(ret, ANYOF_XDIGIT);
3819 for (value = 0; value < 256; value++)
3820 if (isXDIGIT(value))
3821 ANYOF_BITMAP_SET(ret, value);
3823 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsXDigit\n");
3827 ANYOF_CLASS_SET(ret, ANYOF_NXDIGIT);
3829 for (value = 0; value < 256; value++)
3830 if (!isXDIGIT(value))
3831 ANYOF_BITMAP_SET(ret, value);
3833 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsXDigit\n");
3836 vFAIL("Invalid [::] class");
3840 ANYOF_FLAGS(ret) |= ANYOF_CLASS;
3843 } /* end of namedclass \blah */
3846 if (prevvalue > value) /* b-a */ {
3847 Simple_vFAIL4("Invalid [] range \"%*.*s\"",
3848 RExC_parse - rangebegin,
3849 RExC_parse - rangebegin,
3851 range = 0; /* not a valid range */
3855 prevvalue = value; /* save the beginning of the range */
3856 if (*RExC_parse == '-' && RExC_parse+1 < RExC_end &&
3857 RExC_parse[1] != ']') {
3860 /* a bad range like \w-, [:word:]- ? */
3861 if (namedclass > OOB_NAMEDCLASS) {
3862 if (ckWARN(WARN_REGEXP))
3864 "False [] range \"%*.*s\"",
3865 RExC_parse - rangebegin,
3866 RExC_parse - rangebegin,
3869 ANYOF_BITMAP_SET(ret, '-');
3871 range = 1; /* yeah, it's a range! */
3872 continue; /* but do it the next time */
3876 /* now is the next time */
3880 if (prevvalue < 256) {
3881 IV ceilvalue = value < 256 ? value : 255;
3884 if ((isLOWER(prevvalue) && isLOWER(ceilvalue)) ||
3885 (isUPPER(prevvalue) && isUPPER(ceilvalue)))
3887 if (isLOWER(prevvalue)) {
3888 for (i = prevvalue; i <= ceilvalue; i++)
3890 ANYOF_BITMAP_SET(ret, i);
3892 for (i = prevvalue; i <= ceilvalue; i++)
3894 ANYOF_BITMAP_SET(ret, i);
3899 for (i = prevvalue; i <= ceilvalue; i++)
3900 ANYOF_BITMAP_SET(ret, i);
3903 ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
3904 if (prevvalue < value)
3905 Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n",
3906 (UV)prevvalue, (UV)value);
3907 else if (prevvalue == value)
3908 Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
3913 range = 0; /* this range (if it was one) is done now */
3917 ANYOF_FLAGS(ret) |= ANYOF_LARGE;
3919 RExC_size += ANYOF_CLASS_ADD_SKIP;
3921 RExC_emit += ANYOF_CLASS_ADD_SKIP;
3924 /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */
3926 /* If the only flag is folding (plus possibly inversion). */
3927 ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD)
3929 for (value = 0; value < 256; ++value) {
3930 if (ANYOF_BITMAP_TEST(ret, value)) {
3931 IV fold = PL_fold[value];
3934 ANYOF_BITMAP_SET(ret, fold);
3937 ANYOF_FLAGS(ret) &= ~ANYOF_FOLD;
3940 /* optimize inverted simple patterns (e.g. [^a-z]) */
3941 if (!SIZE_ONLY && optimize_invert &&
3942 /* If the only flag is inversion. */
3943 (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) {
3944 for (value = 0; value < ANYOF_BITMAP_SIZE; ++value)
3945 ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL;
3946 ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL;
3953 av_store(av, 0, listsv);
3954 av_store(av, 1, NULL);
3955 rv = newRV_noinc((SV*)av);
3956 n = add_data(pRExC_state, 1, "s");
3957 RExC_rx->data->data[n] = (void*)rv;
3965 S_nextchar(pTHX_ RExC_state_t *pRExC_state)
3967 char* retval = RExC_parse++;
3970 if (*RExC_parse == '(' && RExC_parse[1] == '?' &&
3971 RExC_parse[2] == '#') {
3972 while (*RExC_parse && *RExC_parse != ')')
3977 if (RExC_flags16 & PMf_EXTENDED) {
3978 if (isSPACE(*RExC_parse)) {
3982 else if (*RExC_parse == '#') {
3983 while (*RExC_parse && *RExC_parse != '\n')
3994 - reg_node - emit a node
3996 STATIC regnode * /* Location. */
3997 S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op)
3999 register regnode *ret;
4000 register regnode *ptr;
4004 SIZE_ALIGN(RExC_size);
4009 NODE_ALIGN_FILL(ret);
4011 FILL_ADVANCE_NODE(ptr, op);
4012 if (RExC_offsets) { /* MJD */
4013 MJD_OFFSET_DEBUG((stderr, "%s:%u: (op %s) %s %u <- %u (len %u) (max %u).\n",
4014 "reg_node", __LINE__,
4016 RExC_emit - RExC_emit_start > RExC_offsets[0]
4017 ? "Overwriting end of array!\n" : "OK",
4018 RExC_emit - RExC_emit_start,
4019 RExC_parse - RExC_start,
4021 Set_Node_Offset(RExC_emit, RExC_parse + (op == END));
4030 - reganode - emit a node with an argument
4032 STATIC regnode * /* Location. */
4033 S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg)
4035 register regnode *ret;
4036 register regnode *ptr;
4040 SIZE_ALIGN(RExC_size);
4045 NODE_ALIGN_FILL(ret);
4047 FILL_ADVANCE_NODE_ARG(ptr, op, arg);
4048 if (RExC_offsets) { /* MJD */
4049 MJD_OFFSET_DEBUG((stderr, "%s: %s %u <- %u (max %u).\n",
4051 RExC_emit - RExC_emit_start > RExC_offsets[0] ?
4052 "Overwriting end of array!\n" : "OK",
4053 RExC_emit - RExC_emit_start,
4054 RExC_parse - RExC_start,
4056 Set_Cur_Node_Offset;
4065 - reguni - emit (if appropriate) a Unicode character
4068 S_reguni(pTHX_ RExC_state_t *pRExC_state, UV uv, char* s, STRLEN* lenp)
4070 *lenp = SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s);
4074 - reginsert - insert an operator in front of already-emitted operand
4076 * Means relocating the operand.
4079 S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd)
4081 register regnode *src;
4082 register regnode *dst;
4083 register regnode *place;
4084 register int offset = regarglen[(U8)op];
4086 /* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */
4089 RExC_size += NODE_STEP_REGNODE + offset;
4094 RExC_emit += NODE_STEP_REGNODE + offset;
4096 while (src > opnd) {
4097 StructCopy(--src, --dst, regnode);
4098 if (RExC_offsets) { /* MJD 20010112 */
4099 MJD_OFFSET_DEBUG((stderr, "%s: %s copy %u -> %u (max %u).\n",
4101 dst - RExC_emit_start > RExC_offsets[0]
4102 ? "Overwriting end of array!\n" : "OK",
4103 src - RExC_emit_start,
4104 dst - RExC_emit_start,
4106 Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src));
4107 Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src));
4112 place = opnd; /* Op node, where operand used to be. */
4113 if (RExC_offsets) { /* MJD */
4114 MJD_OFFSET_DEBUG((stderr, "%s: %s %u <- %u (max %u).\n",
4116 place - RExC_emit_start > RExC_offsets[0]
4117 ? "Overwriting end of array!\n" : "OK",
4118 place - RExC_emit_start,
4119 RExC_parse - RExC_start,
4121 Set_Node_Offset(place, RExC_parse);
4123 src = NEXTOPER(place);
4124 FILL_ADVANCE_NODE(place, op);
4125 Zero(src, offset, regnode);
4129 - regtail - set the next-pointer at the end of a node chain of p to val.
4132 S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, regnode *val)
4134 register regnode *scan;
4135 register regnode *temp;
4140 /* Find last node. */
4143 temp = regnext(scan);
4149 if (reg_off_by_arg[OP(scan)]) {
4150 ARG_SET(scan, val - scan);
4153 NEXT_OFF(scan) = val - scan;
4158 - regoptail - regtail on operand of first argument; nop if operandless
4161 S_regoptail(pTHX_ RExC_state_t *pRExC_state, regnode *p, regnode *val)
4163 /* "Operandless" and "op != BRANCH" are synonymous in practice. */
4164 if (p == NULL || SIZE_ONLY)
4166 if (PL_regkind[(U8)OP(p)] == BRANCH) {
4167 regtail(pRExC_state, NEXTOPER(p), val);
4169 else if ( PL_regkind[(U8)OP(p)] == BRANCHJ) {
4170 regtail(pRExC_state, NEXTOPER(NEXTOPER(p)), val);
4177 - regcurly - a little FSA that accepts {\d+,?\d*}
4180 S_regcurly(pTHX_ register char *s)
4201 S_dumpuntil(pTHX_ regnode *start, regnode *node, regnode *last, SV* sv, I32 l)
4203 register U8 op = EXACT; /* Arbitrary non-END op. */
4204 register regnode *next;
4206 while (op != END && (!last || node < last)) {
4207 /* While that wasn't END last time... */
4213 next = regnext(node);
4215 if (OP(node) == OPTIMIZED)
4218 PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start),
4219 (int)(2*l + 1), "", SvPVX(sv));
4220 if (next == NULL) /* Next ptr. */
4221 PerlIO_printf(Perl_debug_log, "(0)");
4223 PerlIO_printf(Perl_debug_log, "(%"IVdf")", (IV)(next - start));
4224 (void)PerlIO_putc(Perl_debug_log, '\n');
4226 if (PL_regkind[(U8)op] == BRANCHJ) {
4227 register regnode *nnode = (OP(next) == LONGJMP
4230 if (last && nnode > last)
4232 node = dumpuntil(start, NEXTOPER(NEXTOPER(node)), nnode, sv, l + 1);
4234 else if (PL_regkind[(U8)op] == BRANCH) {
4235 node = dumpuntil(start, NEXTOPER(node), next, sv, l + 1);
4237 else if ( op == CURLY) { /* `next' might be very big: optimizer */
4238 node = dumpuntil(start, NEXTOPER(node) + EXTRA_STEP_2ARGS,
4239 NEXTOPER(node) + EXTRA_STEP_2ARGS + 1, sv, l + 1);
4241 else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) {
4242 node = dumpuntil(start, NEXTOPER(node) + EXTRA_STEP_2ARGS,
4245 else if ( op == PLUS || op == STAR) {
4246 node = dumpuntil(start, NEXTOPER(node), NEXTOPER(node) + 1, sv, l + 1);
4248 else if (op == ANYOF) {
4249 /* arglen 1 + class block */
4250 node += 1 + ((ANYOF_FLAGS(node) & ANYOF_LARGE)
4251 ? ANYOF_CLASS_SKIP : ANYOF_SKIP);
4252 node = NEXTOPER(node);
4254 else if (PL_regkind[(U8)op] == EXACT) {
4255 /* Literal string, where present. */
4256 node += NODE_SZ_STR(node) - 1;
4257 node = NEXTOPER(node);
4260 node = NEXTOPER(node);
4261 node += regarglen[(U8)op];
4263 if (op == CURLYX || op == OPEN)
4265 else if (op == WHILEM)
4271 #endif /* DEBUGGING */
4274 - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form
4277 Perl_regdump(pTHX_ regexp *r)
4280 SV *sv = sv_newmortal();
4282 (void)dumpuntil(r->program, r->program + 1, NULL, sv, 0);
4284 /* Header fields of interest. */
4285 if (r->anchored_substr)
4286 PerlIO_printf(Perl_debug_log,
4287 "anchored `%s%.*s%s'%s at %"IVdf" ",
4289 (int)(SvCUR(r->anchored_substr) - (SvTAIL(r->anchored_substr)!=0)),
4290 SvPVX(r->anchored_substr),
4292 SvTAIL(r->anchored_substr) ? "$" : "",
4293 (IV)r->anchored_offset);
4294 if (r->float_substr)
4295 PerlIO_printf(Perl_debug_log,
4296 "floating `%s%.*s%s'%s at %"IVdf"..%"UVuf" ",
4298 (int)(SvCUR(r->float_substr) - (SvTAIL(r->float_substr)!=0)),
4299 SvPVX(r->float_substr),
4301 SvTAIL(r->float_substr) ? "$" : "",
4302 (IV)r->float_min_offset, (UV)r->float_max_offset);
4303 if (r->check_substr)
4304 PerlIO_printf(Perl_debug_log,
4305 r->check_substr == r->float_substr
4306 ? "(checking floating" : "(checking anchored");
4307 if (r->reganch & ROPT_NOSCAN)
4308 PerlIO_printf(Perl_debug_log, " noscan");
4309 if (r->reganch & ROPT_CHECK_ALL)
4310 PerlIO_printf(Perl_debug_log, " isall");
4311 if (r->check_substr)
4312 PerlIO_printf(Perl_debug_log, ") ");
4314 if (r->regstclass) {
4315 regprop(sv, r->regstclass);
4316 PerlIO_printf(Perl_debug_log, "stclass `%s' ", SvPVX(sv));
4318 if (r->reganch & ROPT_ANCH) {
4319 PerlIO_printf(Perl_debug_log, "anchored");
4320 if (r->reganch & ROPT_ANCH_BOL)
4321 PerlIO_printf(Perl_debug_log, "(BOL)");
4322 if (r->reganch & ROPT_ANCH_MBOL)
4323 PerlIO_printf(Perl_debug_log, "(MBOL)");
4324 if (r->reganch & ROPT_ANCH_SBOL)
4325 PerlIO_printf(Perl_debug_log, "(SBOL)");
4326 if (r->reganch & ROPT_ANCH_GPOS)
4327 PerlIO_printf(Perl_debug_log, "(GPOS)");
4328 PerlIO_putc(Perl_debug_log, ' ');
4330 if (r->reganch & ROPT_GPOS_SEEN)
4331 PerlIO_printf(Perl_debug_log, "GPOS ");
4332 if (r->reganch & ROPT_SKIP)
4333 PerlIO_printf(Perl_debug_log, "plus ");
4334 if (r->reganch & ROPT_IMPLICIT)
4335 PerlIO_printf(Perl_debug_log, "implicit ");
4336 PerlIO_printf(Perl_debug_log, "minlen %ld ", (long) r->minlen);
4337 if (r->reganch & ROPT_EVAL_SEEN)
4338 PerlIO_printf(Perl_debug_log, "with eval ");
4339 PerlIO_printf(Perl_debug_log, "\n");
4342 U32 len = r->offsets[0];
4343 PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)r->offsets[0]);
4344 for (i = 1; i <= len; i++)
4345 PerlIO_printf(Perl_debug_log, "%"UVuf"[%"UVuf"] ",
4346 (UV)r->offsets[i*2-1],
4347 (UV)r->offsets[i*2]);
4348 PerlIO_printf(Perl_debug_log, "\n");
4350 #endif /* DEBUGGING */
4356 S_put_byte(pTHX_ SV *sv, int c)
4358 if (isCNTRL(c) || c == 255 || !isPRINT(c))
4359 Perl_sv_catpvf(aTHX_ sv, "\\%o", c);
4360 else if (c == '-' || c == ']' || c == '\\' || c == '^')
4361 Perl_sv_catpvf(aTHX_ sv, "\\%c", c);
4363 Perl_sv_catpvf(aTHX_ sv, "%c", c);
4366 #endif /* DEBUGGING */
4369 - regprop - printable representation of opcode
4372 Perl_regprop(pTHX_ SV *sv, regnode *o)
4377 sv_setpvn(sv, "", 0);
4378 if (OP(o) >= reg_num) /* regnode.type is unsigned */
4379 /* It would be nice to FAIL() here, but this may be called from
4380 regexec.c, and it would be hard to supply pRExC_state. */
4381 Perl_croak(aTHX_ "Corrupted regexp opcode");
4382 sv_catpv(sv, (char*)reg_name[OP(o)]); /* Take off const! */
4384 k = PL_regkind[(U8)OP(o)];
4387 Perl_sv_catpvf(aTHX_ sv, " <%s%.*s%s>", PL_colors[0],
4388 STR_LEN(o), STRING(o), PL_colors[1]);
4389 else if (k == CURLY) {
4390 if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX)
4391 Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */
4392 Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o));
4394 else if (k == WHILEM && o->flags) /* Ordinal/of */
4395 Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4);
4396 else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP )
4397 Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */
4398 else if (k == LOGICAL)
4399 Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */
4400 else if (k == ANYOF) {
4401 int i, rangestart = -1;
4402 U8 flags = ANYOF_FLAGS(o);
4403 const char * const anyofs[] = { /* Should be syncronized with
4404 * ANYOF_ #xdefines in regcomp.h */
4437 if (flags & ANYOF_LOCALE)
4438 sv_catpv(sv, "{loc}");
4439 if (flags & ANYOF_FOLD)
4440 sv_catpv(sv, "{i}");
4441 Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]);
4442 if (flags & ANYOF_INVERT)
4444 for (i = 0; i <= 256; i++) {
4445 if (i < 256 && ANYOF_BITMAP_TEST(o,i)) {
4446 if (rangestart == -1)
4448 } else if (rangestart != -1) {
4449 if (i <= rangestart + 3)
4450 for (; rangestart < i; rangestart++)
4451 put_byte(sv, rangestart);
4453 put_byte(sv, rangestart);
4455 put_byte(sv, i - 1);
4461 if (o->flags & ANYOF_CLASS)
4462 for (i = 0; i < sizeof(anyofs)/sizeof(char*); i++)
4463 if (ANYOF_CLASS_TEST(o,i))
4464 sv_catpv(sv, anyofs[i]);
4466 if (flags & ANYOF_UNICODE)
4467 sv_catpv(sv, "{unicode}");
4468 else if (flags & ANYOF_UNICODE_ALL)
4469 sv_catpv(sv, "{all-unicode}");
4473 SV *sw = regclass_swash(o, FALSE, &lv);
4478 U8 s[UTF8_MAXLEN+1];
4480 for (i = 0; i <= 256; i++) { /* just the first 256 */
4481 U8 *e = uvchr_to_utf8(s, i);
4483 if (i < 256 && swash_fetch(sw, s, TRUE)) {
4484 if (rangestart == -1)
4486 } else if (rangestart != -1) {
4489 if (i <= rangestart + 3)
4490 for (; rangestart < i; rangestart++) {
4491 for(e = uvchr_to_utf8(s, rangestart), p = s; p < e; p++)
4495 for (e = uvchr_to_utf8(s, rangestart), p = s; p < e; p++)
4498 for (e = uvchr_to_utf8(s, i - 1), p = s; p < e; p++)
4505 sv_catpv(sv, "..."); /* et cetera */
4509 char *s = savepv(SvPVX(lv));
4512 while(*s && *s != '\n') s++;
4533 Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]);
4535 else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH))
4536 Perl_sv_catpvf(aTHX_ sv, "[-%d]", o->flags);
4537 #endif /* DEBUGGING */
4541 Perl_re_intuit_string(pTHX_ regexp *prog)
4542 { /* Assume that RE_INTUIT is set */
4545 char *s = SvPV(prog->check_substr,n_a);
4547 if (!PL_colorset) reginitcolors();
4548 PerlIO_printf(Perl_debug_log,
4549 "%sUsing REx substr:%s `%s%.60s%s%s'\n",
4550 PL_colors[4],PL_colors[5],PL_colors[0],
4553 (strlen(s) > 60 ? "..." : ""));
4556 return prog->check_substr;
4560 Perl_pregfree(pTHX_ struct regexp *r)
4562 DEBUG_r(if (!PL_colorset) reginitcolors());
4564 if (!r || (--r->refcnt > 0))
4566 DEBUG_r(PerlIO_printf(Perl_debug_log,
4567 "%sFreeing REx:%s `%s%.60s%s%s'\n",
4568 PL_colors[4],PL_colors[5],PL_colors[0],
4571 (strlen(r->precomp) > 60 ? "..." : "")));
4574 Safefree(r->precomp);
4575 if (r->offsets) /* 20010421 MJD */
4576 Safefree(r->offsets);
4577 if (RX_MATCH_COPIED(r))
4578 Safefree(r->subbeg);
4580 if (r->anchored_substr)
4581 SvREFCNT_dec(r->anchored_substr);
4582 if (r->float_substr)
4583 SvREFCNT_dec(r->float_substr);
4584 Safefree(r->substrs);
4587 int n = r->data->count;
4588 AV* new_comppad = NULL;
4593 /* If you add a ->what type here, update the comment in regcomp.h */
4594 switch (r->data->what[n]) {
4596 SvREFCNT_dec((SV*)r->data->data[n]);
4599 Safefree(r->data->data[n]);
4602 new_comppad = (AV*)r->data->data[n];
4605 if (new_comppad == NULL)
4606 Perl_croak(aTHX_ "panic: pregfree comppad");
4607 old_comppad = PL_comppad;
4608 old_curpad = PL_curpad;
4609 /* Watch out for global destruction's random ordering. */
4610 if (SvTYPE(new_comppad) == SVt_PVAV) {
4611 PL_comppad = new_comppad;
4612 PL_curpad = AvARRAY(new_comppad);
4617 if (!OpREFCNT_dec((OP_4tree*)r->data->data[n])) {
4618 op_free((OP_4tree*)r->data->data[n]);
4621 PL_comppad = old_comppad;
4622 PL_curpad = old_curpad;
4623 SvREFCNT_dec((SV*)new_comppad);
4629 Perl_croak(aTHX_ "panic: regfree data code '%c'", r->data->what[n]);
4632 Safefree(r->data->what);
4635 Safefree(r->startp);
4641 - regnext - dig the "next" pointer out of a node
4643 * [Note, when REGALIGN is defined there are two places in regmatch()
4644 * that bypass this code for speed.]
4647 Perl_regnext(pTHX_ register regnode *p)
4649 register I32 offset;
4651 if (p == &PL_regdummy)
4654 offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p));
4662 S_re_croak2(pTHX_ const char* pat1,const char* pat2,...)
4665 STRLEN l1 = strlen(pat1);
4666 STRLEN l2 = strlen(pat2);
4675 Copy(pat1, buf, l1 , char);
4676 Copy(pat2, buf + l1, l2 , char);
4677 buf[l1 + l2] = '\n';
4678 buf[l1 + l2 + 1] = '\0';
4680 /* ANSI variant takes additional second argument */
4681 va_start(args, pat2);
4685 msv = vmess(buf, &args);
4687 message = SvPV(msv,l1);
4690 Copy(message, buf, l1 , char);
4691 buf[l1] = '\0'; /* Overwrite \n */
4692 Perl_croak(aTHX_ "%s", buf);
4695 /* XXX Here's a total kludge. But we need to re-enter for swash routines. */
4698 Perl_save_re_context(pTHX)
4701 SAVEPPTR(RExC_precomp); /* uncompiled string. */
4702 SAVEI32(RExC_npar); /* () count. */
4703 SAVEI32(RExC_size); /* Code size. */
4704 SAVEI16(RExC_flags16); /* are we folding, multilining? */
4705 SAVEVPTR(RExC_rx); /* from regcomp.c */
4706 SAVEI32(RExC_seen); /* from regcomp.c */
4707 SAVEI32(RExC_sawback); /* Did we see \1, ...? */
4708 SAVEI32(RExC_naughty); /* How bad is this pattern? */
4709 SAVEVPTR(RExC_emit); /* Code-emit pointer; ®dummy = don't */
4710 SAVEPPTR(RExC_end); /* End of input for compile */
4711 SAVEPPTR(RExC_parse); /* Input-scan pointer. */
4714 SAVEI32(PL_reg_flags); /* from regexec.c */
4716 SAVEPPTR(PL_reginput); /* String-input pointer. */
4717 SAVEPPTR(PL_regbol); /* Beginning of input, for ^ check. */
4718 SAVEPPTR(PL_regeol); /* End of input, for $ check. */
4719 SAVEVPTR(PL_regstartp); /* Pointer to startp array. */
4720 SAVEVPTR(PL_regendp); /* Ditto for endp. */
4721 SAVEVPTR(PL_reglastparen); /* Similarly for lastparen. */
4722 SAVEPPTR(PL_regtill); /* How far we are required to go. */
4723 SAVEGENERICPV(PL_reg_start_tmp); /* from regexec.c */
4724 PL_reg_start_tmp = 0;
4725 SAVEI32(PL_reg_start_tmpl); /* from regexec.c */
4726 PL_reg_start_tmpl = 0;
4727 SAVEVPTR(PL_regdata);
4728 SAVEI32(PL_reg_eval_set); /* from regexec.c */
4729 SAVEI32(PL_regnarrate); /* from regexec.c */
4730 SAVEVPTR(PL_regprogram); /* from regexec.c */
4731 SAVEINT(PL_regindent); /* from regexec.c */
4732 SAVEVPTR(PL_regcc); /* from regexec.c */
4733 SAVEVPTR(PL_curcop);
4734 SAVEVPTR(PL_reg_call_cc); /* from regexec.c */
4735 SAVEVPTR(PL_reg_re); /* from regexec.c */
4736 SAVEPPTR(PL_reg_ganch); /* from regexec.c */
4737 SAVESPTR(PL_reg_sv); /* from regexec.c */
4738 SAVEVPTR(PL_reg_magic); /* from regexec.c */
4739 SAVEI32(PL_reg_oldpos); /* from regexec.c */
4740 SAVEVPTR(PL_reg_oldcurpm); /* from regexec.c */
4741 SAVEVPTR(PL_reg_curpm); /* from regexec.c */
4742 SAVEI32(PL_regnpar); /* () count. */
4743 SAVEI32(PL_regsize); /* from regexec.c */
4745 SAVEPPTR(PL_reg_starttry); /* from regexec.c */
4756 clear_re(pTHXo_ void *r)
4758 ReREFCNT_dec((regexp *)r);
projects / p5sagit/p5-mst-13.2.git / blob