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. */
1753 RExC_emit_start = r->program;
1754 RExC_emit = r->program;
1755 /* Store the count of eval-groups for security checks: */
1756 RExC_emit->next_off = ((RExC_seen_evals > U16_MAX) ? U16_MAX : RExC_seen_evals);
1757 REGC((U8)REG_MAGIC, (char*) RExC_emit++);
1759 if (reg(pRExC_state, 0, &flags) == NULL)
1762 /* Dig out information for optimizations. */
1763 r->reganch = pm->op_pmflags & PMf_COMPILETIME; /* Again? */
1764 pm->op_pmflags = RExC_flags16;
1766 r->reganch |= ROPT_UTF8;
1767 r->regstclass = NULL;
1768 if (RExC_naughty >= 10) /* Probably an expensive pattern. */
1769 r->reganch |= ROPT_NAUGHTY;
1770 scan = r->program + 1; /* First BRANCH. */
1772 /* XXXX To minimize changes to RE engine we always allocate
1773 3-units-long substrs field. */
1774 Newz(1004, r->substrs, 1, struct reg_substr_data);
1776 StructCopy(&zero_scan_data, &data, scan_data_t);
1777 /* XXXX Should not we check for something else? Usually it is OPEN1... */
1778 if (OP(scan) != BRANCH) { /* Only one top-level choice. */
1780 STRLEN longest_float_length, longest_fixed_length;
1781 struct regnode_charclass_class ch_class;
1786 /* Skip introductions and multiplicators >= 1. */
1787 while ((OP(first) == OPEN && (sawopen = 1)) ||
1788 /* An OR of *one* alternative - should not happen now. */
1789 (OP(first) == BRANCH && OP(regnext(first)) != BRANCH) ||
1790 (OP(first) == PLUS) ||
1791 (OP(first) == MINMOD) ||
1792 /* An {n,m} with n>0 */
1793 (PL_regkind[(U8)OP(first)] == CURLY && ARG1(first) > 0) ) {
1794 if (OP(first) == PLUS)
1797 first += regarglen[(U8)OP(first)];
1798 first = NEXTOPER(first);
1801 /* Starting-point info. */
1803 if (PL_regkind[(U8)OP(first)] == EXACT) {
1804 if (OP(first) == EXACT)
1805 ; /* Empty, get anchored substr later. */
1806 else if ((OP(first) == EXACTF || OP(first) == EXACTFL))
1807 r->regstclass = first;
1809 else if (strchr((char*)PL_simple,OP(first)))
1810 r->regstclass = first;
1811 else if (PL_regkind[(U8)OP(first)] == BOUND ||
1812 PL_regkind[(U8)OP(first)] == NBOUND)
1813 r->regstclass = first;
1814 else if (PL_regkind[(U8)OP(first)] == BOL) {
1815 r->reganch |= (OP(first) == MBOL
1817 : (OP(first) == SBOL
1820 first = NEXTOPER(first);
1823 else if (OP(first) == GPOS) {
1824 r->reganch |= ROPT_ANCH_GPOS;
1825 first = NEXTOPER(first);
1828 else if ((OP(first) == STAR &&
1829 PL_regkind[(U8)OP(NEXTOPER(first))] == REG_ANY) &&
1830 !(r->reganch & ROPT_ANCH) )
1832 /* turn .* into ^.* with an implied $*=1 */
1833 int type = OP(NEXTOPER(first));
1835 if (type == REG_ANY)
1836 type = ROPT_ANCH_MBOL;
1838 type = ROPT_ANCH_SBOL;
1840 r->reganch |= type | ROPT_IMPLICIT;
1841 first = NEXTOPER(first);
1844 if (sawplus && (!sawopen || !RExC_sawback)
1845 && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */
1846 /* x+ must match at the 1st pos of run of x's */
1847 r->reganch |= ROPT_SKIP;
1849 /* Scan is after the zeroth branch, first is atomic matcher. */
1850 DEBUG_r(PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n",
1851 (IV)(first - scan + 1)));
1853 * If there's something expensive in the r.e., find the
1854 * longest literal string that must appear and make it the
1855 * regmust. Resolve ties in favor of later strings, since
1856 * the regstart check works with the beginning of the r.e.
1857 * and avoiding duplication strengthens checking. Not a
1858 * strong reason, but sufficient in the absence of others.
1859 * [Now we resolve ties in favor of the earlier string if
1860 * it happens that c_offset_min has been invalidated, since the
1861 * earlier string may buy us something the later one won't.]
1865 data.longest_fixed = newSVpvn("",0);
1866 data.longest_float = newSVpvn("",0);
1867 data.last_found = newSVpvn("",0);
1868 data.longest = &(data.longest_fixed);
1870 if (!r->regstclass) {
1871 cl_init(pRExC_state, &ch_class);
1872 data.start_class = &ch_class;
1873 stclass_flag = SCF_DO_STCLASS_AND;
1874 } else /* XXXX Check for BOUND? */
1876 data.last_closep = &last_close;
1878 minlen = study_chunk(pRExC_state, &first, &fake, scan + RExC_size, /* Up to end */
1879 &data, SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag);
1880 if ( RExC_npar == 1 && data.longest == &(data.longest_fixed)
1881 && data.last_start_min == 0 && data.last_end > 0
1882 && !RExC_seen_zerolen
1883 && (!(RExC_seen & REG_SEEN_GPOS) || (r->reganch & ROPT_ANCH_GPOS)))
1884 r->reganch |= ROPT_CHECK_ALL;
1885 scan_commit(pRExC_state, &data);
1886 SvREFCNT_dec(data.last_found);
1888 longest_float_length = CHR_SVLEN(data.longest_float);
1889 if (longest_float_length
1890 || (data.flags & SF_FL_BEFORE_EOL
1891 && (!(data.flags & SF_FL_BEFORE_MEOL)
1892 || (RExC_flags16 & PMf_MULTILINE)))) {
1895 if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */
1896 && data.offset_fixed == data.offset_float_min
1897 && SvCUR(data.longest_fixed) == SvCUR(data.longest_float))
1898 goto remove_float; /* As in (a)+. */
1900 r->float_substr = data.longest_float;
1901 r->float_min_offset = data.offset_float_min;
1902 r->float_max_offset = data.offset_float_max;
1903 t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */
1904 && (!(data.flags & SF_FL_BEFORE_MEOL)
1905 || (RExC_flags16 & PMf_MULTILINE)));
1906 fbm_compile(r->float_substr, t ? FBMcf_TAIL : 0);
1910 r->float_substr = Nullsv;
1911 SvREFCNT_dec(data.longest_float);
1912 longest_float_length = 0;
1915 longest_fixed_length = CHR_SVLEN(data.longest_fixed);
1916 if (longest_fixed_length
1917 || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */
1918 && (!(data.flags & SF_FIX_BEFORE_MEOL)
1919 || (RExC_flags16 & PMf_MULTILINE)))) {
1922 r->anchored_substr = data.longest_fixed;
1923 r->anchored_offset = data.offset_fixed;
1924 t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */
1925 && (!(data.flags & SF_FIX_BEFORE_MEOL)
1926 || (RExC_flags16 & PMf_MULTILINE)));
1927 fbm_compile(r->anchored_substr, t ? FBMcf_TAIL : 0);
1930 r->anchored_substr = Nullsv;
1931 SvREFCNT_dec(data.longest_fixed);
1932 longest_fixed_length = 0;
1935 && (OP(r->regstclass) == REG_ANY || OP(r->regstclass) == SANY))
1936 r->regstclass = NULL;
1937 if ((!r->anchored_substr || r->anchored_offset) && stclass_flag
1938 && !(data.start_class->flags & ANYOF_EOS)
1939 && !cl_is_anything(data.start_class)) {
1940 I32 n = add_data(pRExC_state, 1, "f");
1942 New(1006, RExC_rx->data->data[n], 1,
1943 struct regnode_charclass_class);
1944 StructCopy(data.start_class,
1945 (struct regnode_charclass_class*)RExC_rx->data->data[n],
1946 struct regnode_charclass_class);
1947 r->regstclass = (regnode*)RExC_rx->data->data[n];
1948 r->reganch &= ~ROPT_SKIP; /* Used in find_byclass(). */
1949 PL_regdata = r->data; /* for regprop() */
1950 DEBUG_r({ SV *sv = sv_newmortal();
1951 regprop(sv, (regnode*)data.start_class);
1952 PerlIO_printf(Perl_debug_log,
1953 "synthetic stclass `%s'.\n",
1957 /* A temporary algorithm prefers floated substr to fixed one to dig more info. */
1958 if (longest_fixed_length > longest_float_length) {
1959 r->check_substr = r->anchored_substr;
1960 r->check_offset_min = r->check_offset_max = r->anchored_offset;
1961 if (r->reganch & ROPT_ANCH_SINGLE)
1962 r->reganch |= ROPT_NOSCAN;
1965 r->check_substr = r->float_substr;
1966 r->check_offset_min = data.offset_float_min;
1967 r->check_offset_max = data.offset_float_max;
1969 /* XXXX Currently intuiting is not compatible with ANCH_GPOS.
1970 This should be changed ASAP! */
1971 if (r->check_substr && !(r->reganch & ROPT_ANCH_GPOS)) {
1972 r->reganch |= RE_USE_INTUIT;
1973 if (SvTAIL(r->check_substr))
1974 r->reganch |= RE_INTUIT_TAIL;
1978 /* Several toplevels. Best we can is to set minlen. */
1980 struct regnode_charclass_class ch_class;
1983 DEBUG_r(PerlIO_printf(Perl_debug_log, "\n"));
1984 scan = r->program + 1;
1985 cl_init(pRExC_state, &ch_class);
1986 data.start_class = &ch_class;
1987 data.last_closep = &last_close;
1988 minlen = study_chunk(pRExC_state, &scan, &fake, scan + RExC_size, &data, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS);
1989 r->check_substr = r->anchored_substr = r->float_substr = Nullsv;
1990 if (!(data.start_class->flags & ANYOF_EOS)
1991 && !cl_is_anything(data.start_class)) {
1992 I32 n = add_data(pRExC_state, 1, "f");
1994 New(1006, RExC_rx->data->data[n], 1,
1995 struct regnode_charclass_class);
1996 StructCopy(data.start_class,
1997 (struct regnode_charclass_class*)RExC_rx->data->data[n],
1998 struct regnode_charclass_class);
1999 r->regstclass = (regnode*)RExC_rx->data->data[n];
2000 r->reganch &= ~ROPT_SKIP; /* Used in find_byclass(). */
2001 DEBUG_r({ SV* sv = sv_newmortal();
2002 regprop(sv, (regnode*)data.start_class);
2003 PerlIO_printf(Perl_debug_log,
2004 "synthetic stclass `%s'.\n",
2010 if (RExC_seen & REG_SEEN_GPOS)
2011 r->reganch |= ROPT_GPOS_SEEN;
2012 if (RExC_seen & REG_SEEN_LOOKBEHIND)
2013 r->reganch |= ROPT_LOOKBEHIND_SEEN;
2014 if (RExC_seen & REG_SEEN_EVAL)
2015 r->reganch |= ROPT_EVAL_SEEN;
2016 if (RExC_seen & REG_SEEN_CANY)
2017 r->reganch |= ROPT_CANY_SEEN;
2018 Newz(1002, r->startp, RExC_npar, I32);
2019 Newz(1002, r->endp, RExC_npar, I32);
2020 PL_regdata = r->data; /* for regprop() */
2021 DEBUG_r(regdump(r));
2026 - reg - regular expression, i.e. main body or parenthesized thing
2028 * Caller must absorb opening parenthesis.
2030 * Combining parenthesis handling with the base level of regular expression
2031 * is a trifle forced, but the need to tie the tails of the branches to what
2032 * follows makes it hard to avoid.
2035 S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp)
2036 /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */
2038 register regnode *ret; /* Will be the head of the group. */
2039 register regnode *br;
2040 register regnode *lastbr;
2041 register regnode *ender = 0;
2042 register I32 parno = 0;
2043 I32 flags, oregflags = RExC_flags16, have_branch = 0, open = 0;
2045 /* for (?g), (?gc), and (?o) warnings; warning
2046 about (?c) will warn about (?g) -- japhy */
2048 I32 wastedflags = 0x00,
2051 wasted_gc = 0x02 | 0x04,
2054 char * parse_start = RExC_parse; /* MJD */
2055 char *oregcomp_parse = RExC_parse;
2058 *flagp = 0; /* Tentatively. */
2061 /* Make an OPEN node, if parenthesized. */
2063 if (*RExC_parse == '?') { /* (?...) */
2064 U16 posflags = 0, negflags = 0;
2065 U16 *flagsp = &posflags;
2067 char *seqstart = RExC_parse;
2070 paren = *RExC_parse++;
2071 ret = NULL; /* For look-ahead/behind. */
2073 case '<': /* (?<...) */
2074 RExC_seen |= REG_SEEN_LOOKBEHIND;
2075 if (*RExC_parse == '!')
2077 if (*RExC_parse != '=' && *RExC_parse != '!')
2080 case '=': /* (?=...) */
2081 case '!': /* (?!...) */
2082 RExC_seen_zerolen++;
2083 case ':': /* (?:...) */
2084 case '>': /* (?>...) */
2086 case '$': /* (?$...) */
2087 case '@': /* (?@...) */
2088 vFAIL2("Sequence (?%c...) not implemented", (int)paren);
2090 case '#': /* (?#...) */
2091 while (*RExC_parse && *RExC_parse != ')')
2093 if (*RExC_parse != ')')
2094 FAIL("Sequence (?#... not terminated");
2095 nextchar(pRExC_state);
2098 case 'p': /* (?p...) */
2099 if (SIZE_ONLY && ckWARN2(WARN_DEPRECATED, WARN_REGEXP))
2100 vWARNdep(RExC_parse, "(?p{}) is deprecated - use (??{})");
2102 case '?': /* (??...) */
2104 paren = *RExC_parse++;
2106 case '{': /* (?{...}) */
2108 I32 count = 1, n = 0;
2110 char *s = RExC_parse;
2112 OP_4tree *sop, *rop;
2114 RExC_seen_zerolen++;
2115 RExC_seen |= REG_SEEN_EVAL;
2116 while (count && (c = *RExC_parse)) {
2117 if (c == '\\' && RExC_parse[1])
2125 if (*RExC_parse != ')')
2128 vFAIL("Sequence (?{...}) not terminated or not {}-balanced");
2133 if (RExC_parse - 1 - s)
2134 sv = newSVpvn(s, RExC_parse - 1 - s);
2136 sv = newSVpvn("", 0);
2139 Perl_save_re_context(aTHX);
2140 rop = sv_compile_2op(sv, &sop, "re", &av);
2141 sop->op_private |= OPpREFCOUNTED;
2142 /* re_dup will OpREFCNT_inc */
2143 OpREFCNT_set(sop, 1);
2146 n = add_data(pRExC_state, 3, "nop");
2147 RExC_rx->data->data[n] = (void*)rop;
2148 RExC_rx->data->data[n+1] = (void*)sop;
2149 RExC_rx->data->data[n+2] = (void*)av;
2152 else { /* First pass */
2153 if (PL_reginterp_cnt < ++RExC_seen_evals
2154 && PL_curcop != &PL_compiling)
2155 /* No compiled RE interpolated, has runtime
2156 components ===> unsafe. */
2157 FAIL("Eval-group not allowed at runtime, use re 'eval'");
2158 if (PL_tainting && PL_tainted)
2159 FAIL("Eval-group in insecure regular expression");
2162 nextchar(pRExC_state);
2164 ret = reg_node(pRExC_state, LOGICAL);
2167 regtail(pRExC_state, ret, reganode(pRExC_state, EVAL, n));
2168 /* deal with the length of this later - MJD */
2171 return reganode(pRExC_state, EVAL, n);
2173 case '(': /* (?(?{...})...) and (?(?=...)...) */
2175 if (RExC_parse[0] == '?') { /* (?(?...)) */
2176 if (RExC_parse[1] == '=' || RExC_parse[1] == '!'
2177 || RExC_parse[1] == '<'
2178 || RExC_parse[1] == '{') { /* Lookahead or eval. */
2181 ret = reg_node(pRExC_state, LOGICAL);
2184 regtail(pRExC_state, ret, reg(pRExC_state, 1, &flag));
2188 else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) {
2190 parno = atoi(RExC_parse++);
2192 while (isDIGIT(*RExC_parse))
2194 ret = reganode(pRExC_state, GROUPP, parno);
2196 if ((c = *nextchar(pRExC_state)) != ')')
2197 vFAIL("Switch condition not recognized");
2199 regtail(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0));
2200 br = regbranch(pRExC_state, &flags, 1);
2202 br = reganode(pRExC_state, LONGJMP, 0);
2204 regtail(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0));
2205 c = *nextchar(pRExC_state);
2209 lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */
2210 regbranch(pRExC_state, &flags, 1);
2211 regtail(pRExC_state, ret, lastbr);
2214 c = *nextchar(pRExC_state);
2219 vFAIL("Switch (?(condition)... contains too many branches");
2220 ender = reg_node(pRExC_state, TAIL);
2221 regtail(pRExC_state, br, ender);
2223 regtail(pRExC_state, lastbr, ender);
2224 regtail(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender);
2227 regtail(pRExC_state, ret, ender);
2231 vFAIL2("Unknown switch condition (?(%.2s", RExC_parse);
2235 RExC_parse--; /* for vFAIL to print correctly */
2236 vFAIL("Sequence (? incomplete");
2240 parse_flags: /* (?i) */
2241 while (*RExC_parse && strchr("iogcmsx", *RExC_parse)) {
2242 /* (?g), (?gc) and (?o) are useless here
2243 and must be globally applied -- japhy */
2245 if (*RExC_parse == 'o' || *RExC_parse == 'g') {
2246 if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
2247 I32 wflagbit = *RExC_parse == 'o' ? wasted_o : wasted_g;
2248 if (! (wastedflags & wflagbit) ) {
2249 wastedflags |= wflagbit;
2252 "Useless (%s%c) - %suse /%c modifier",
2253 flagsp == &negflags ? "?-" : "?",
2255 flagsp == &negflags ? "don't " : "",
2261 else if (*RExC_parse == 'c') {
2262 if (SIZE_ONLY && ckWARN(WARN_REGEXP)) {
2263 if (! (wastedflags & wasted_c) ) {
2264 wastedflags |= wasted_gc;
2267 "Useless (%sc) - %suse /gc modifier",
2268 flagsp == &negflags ? "?-" : "?",
2269 flagsp == &negflags ? "don't " : ""
2274 else { pmflag(flagsp, *RExC_parse); }
2278 if (*RExC_parse == '-') {
2280 wastedflags = 0; /* reset so (?g-c) warns twice */
2284 RExC_flags16 |= posflags;
2285 RExC_flags16 &= ~negflags;
2286 if (*RExC_parse == ':') {
2292 if (*RExC_parse != ')') {
2294 vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart);
2296 nextchar(pRExC_state);
2304 ret = reganode(pRExC_state, OPEN, parno);
2305 Set_Node_Length(ret, 1); /* MJD */
2306 Set_Node_Offset(ret, RExC_parse); /* MJD */
2313 /* Pick up the branches, linking them together. */
2314 parse_start = RExC_parse; /* MJD */
2315 br = regbranch(pRExC_state, &flags, 1);
2316 /* branch_len = (paren != 0); */
2320 if (*RExC_parse == '|') {
2321 if (!SIZE_ONLY && RExC_extralen) {
2322 reginsert(pRExC_state, BRANCHJ, br);
2325 reginsert(pRExC_state, BRANCH, br);
2326 Set_Node_Length(br, paren != 0);
2327 Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start);
2331 RExC_extralen += 1; /* For BRANCHJ-BRANCH. */
2333 else if (paren == ':') {
2334 *flagp |= flags&SIMPLE;
2336 if (open) { /* Starts with OPEN. */
2337 regtail(pRExC_state, ret, br); /* OPEN -> first. */
2339 else if (paren != '?') /* Not Conditional */
2343 *flagp |= flags&SPSTART;
2345 while (*RExC_parse == '|') {
2346 if (!SIZE_ONLY && RExC_extralen) {
2347 ender = reganode(pRExC_state, LONGJMP,0);
2348 regtail(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */
2351 RExC_extralen += 2; /* Account for LONGJMP. */
2352 nextchar(pRExC_state);
2353 br = regbranch(pRExC_state, &flags, 0);
2357 regtail(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */
2361 *flagp |= flags&SPSTART;
2364 if (have_branch || paren != ':') {
2365 /* Make a closing node, and hook it on the end. */
2368 ender = reg_node(pRExC_state, TAIL);
2371 ender = reganode(pRExC_state, CLOSE, parno);
2372 Set_Node_Offset(ender,RExC_parse+1); /* MJD */
2373 Set_Node_Length(ender,1); /* MJD */
2379 *flagp &= ~HASWIDTH;
2382 ender = reg_node(pRExC_state, SUCCEED);
2385 ender = reg_node(pRExC_state, END);
2388 regtail(pRExC_state, lastbr, ender);
2391 /* Hook the tails of the branches to the closing node. */
2392 for (br = ret; br != NULL; br = regnext(br)) {
2393 regoptail(pRExC_state, br, ender);
2400 static char parens[] = "=!<,>";
2402 if (paren && (p = strchr(parens, paren))) {
2403 int node = ((p - parens) % 2) ? UNLESSM : IFMATCH;
2404 int flag = (p - parens) > 1;
2407 node = SUSPEND, flag = 0;
2408 reginsert(pRExC_state, node,ret);
2410 regtail(pRExC_state, ret, reg_node(pRExC_state, TAIL));
2414 /* Check for proper termination. */
2416 RExC_flags16 = oregflags;
2417 if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') {
2418 RExC_parse = oregcomp_parse;
2419 vFAIL("Unmatched (");
2422 else if (!paren && RExC_parse < RExC_end) {
2423 if (*RExC_parse == ')') {
2425 vFAIL("Unmatched )");
2428 FAIL("Junk on end of regexp"); /* "Can't happen". */
2436 - regbranch - one alternative of an | operator
2438 * Implements the concatenation operator.
2441 S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first)
2443 register regnode *ret;
2444 register regnode *chain = NULL;
2445 register regnode *latest;
2446 I32 flags = 0, c = 0;
2451 if (!SIZE_ONLY && RExC_extralen)
2452 ret = reganode(pRExC_state, BRANCHJ,0);
2454 ret = reg_node(pRExC_state, BRANCH);
2455 Set_Node_Length(ret, 1);
2459 if (!first && SIZE_ONLY)
2460 RExC_extralen += 1; /* BRANCHJ */
2462 *flagp = WORST; /* Tentatively. */
2465 nextchar(pRExC_state);
2466 while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') {
2468 latest = regpiece(pRExC_state, &flags);
2469 if (latest == NULL) {
2470 if (flags & TRYAGAIN)
2474 else if (ret == NULL)
2476 *flagp |= flags&HASWIDTH;
2477 if (chain == NULL) /* First piece. */
2478 *flagp |= flags&SPSTART;
2481 regtail(pRExC_state, chain, latest);
2486 if (chain == NULL) { /* Loop ran zero times. */
2487 chain = reg_node(pRExC_state, NOTHING);
2492 *flagp |= flags&SIMPLE;
2499 - regpiece - something followed by possible [*+?]
2501 * Note that the branching code sequences used for ? and the general cases
2502 * of * and + are somewhat optimized: they use the same NOTHING node as
2503 * both the endmarker for their branch list and the body of the last branch.
2504 * It might seem that this node could be dispensed with entirely, but the
2505 * endmarker role is not redundant.
2508 S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp)
2510 register regnode *ret;
2512 register char *next;
2514 char *origparse = RExC_parse;
2517 I32 max = REG_INFTY;
2520 ret = regatom(pRExC_state, &flags);
2522 if (flags & TRYAGAIN)
2529 if (op == '{' && regcurly(RExC_parse)) {
2530 parse_start = RExC_parse; /* MJD */
2531 next = RExC_parse + 1;
2533 while (isDIGIT(*next) || *next == ',') {
2542 if (*next == '}') { /* got one */
2546 min = atoi(RExC_parse);
2550 maxpos = RExC_parse;
2552 if (!max && *maxpos != '0')
2553 max = REG_INFTY; /* meaning "infinity" */
2554 else if (max >= REG_INFTY)
2555 vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1);
2557 nextchar(pRExC_state);
2560 if ((flags&SIMPLE)) {
2561 RExC_naughty += 2 + RExC_naughty / 2;
2562 reginsert(pRExC_state, CURLY, ret);
2563 Set_Node_Offset(ret, parse_start+1); /* MJD */
2564 Set_Node_Cur_Length(ret);
2567 regnode *w = reg_node(pRExC_state, WHILEM);
2570 regtail(pRExC_state, ret, w);
2571 if (!SIZE_ONLY && RExC_extralen) {
2572 reginsert(pRExC_state, LONGJMP,ret);
2573 reginsert(pRExC_state, NOTHING,ret);
2574 NEXT_OFF(ret) = 3; /* Go over LONGJMP. */
2576 reginsert(pRExC_state, CURLYX,ret);
2578 Set_Node_Offset(ret, parse_start+1);
2579 Set_Node_Length(ret,
2580 op == '{' ? (RExC_parse - parse_start) : 1);
2582 if (!SIZE_ONLY && RExC_extralen)
2583 NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */
2584 regtail(pRExC_state, ret, reg_node(pRExC_state, NOTHING));
2586 RExC_whilem_seen++, RExC_extralen += 3;
2587 RExC_naughty += 4 + RExC_naughty; /* compound interest */
2595 if (max && max < min)
2596 vFAIL("Can't do {n,m} with n > m");
2611 #if 0 /* Now runtime fix should be reliable. */
2613 /* if this is reinstated, don't forget to put this back into perldiag:
2615 =item Regexp *+ operand could be empty at {#} in regex m/%s/
2617 (F) The part of the regexp subject to either the * or + quantifier
2618 could match an empty string. The {#} shows in the regular
2619 expression about where the problem was discovered.
2623 if (!(flags&HASWIDTH) && op != '?')
2624 vFAIL("Regexp *+ operand could be empty");
2627 parse_start = RExC_parse;
2628 nextchar(pRExC_state);
2630 *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH);
2632 if (op == '*' && (flags&SIMPLE)) {
2633 reginsert(pRExC_state, STAR, ret);
2637 else if (op == '*') {
2641 else if (op == '+' && (flags&SIMPLE)) {
2642 reginsert(pRExC_state, PLUS, ret);
2646 else if (op == '+') {
2650 else if (op == '?') {
2655 if (ckWARN(WARN_REGEXP) && !SIZE_ONLY && !(flags&HASWIDTH) && max > REG_INFTY/3) {
2657 "%.*s matches null string many times",
2658 RExC_parse - origparse,
2662 if (*RExC_parse == '?') {
2663 nextchar(pRExC_state);
2664 reginsert(pRExC_state, MINMOD, ret);
2665 regtail(pRExC_state, ret, ret + NODE_STEP_REGNODE);
2667 if (ISMULT2(RExC_parse)) {
2669 vFAIL("Nested quantifiers");
2676 - regatom - the lowest level
2678 * Optimization: gobbles an entire sequence of ordinary characters so that
2679 * it can turn them into a single node, which is smaller to store and
2680 * faster to run. Backslashed characters are exceptions, each becoming a
2681 * separate node; the code is simpler that way and it's not worth fixing.
2683 * [Yes, it is worth fixing, some scripts can run twice the speed.] */
2685 S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp)
2687 register regnode *ret = 0;
2689 char *parse_start = 0;
2691 *flagp = WORST; /* Tentatively. */
2694 switch (*RExC_parse) {
2696 RExC_seen_zerolen++;
2697 nextchar(pRExC_state);
2698 if (RExC_flags16 & PMf_MULTILINE)
2699 ret = reg_node(pRExC_state, MBOL);
2700 else if (RExC_flags16 & PMf_SINGLELINE)
2701 ret = reg_node(pRExC_state, SBOL);
2703 ret = reg_node(pRExC_state, BOL);
2704 Set_Node_Length(ret, 1); /* MJD */
2707 nextchar(pRExC_state);
2709 RExC_seen_zerolen++;
2710 if (RExC_flags16 & PMf_MULTILINE)
2711 ret = reg_node(pRExC_state, MEOL);
2712 else if (RExC_flags16 & PMf_SINGLELINE)
2713 ret = reg_node(pRExC_state, SEOL);
2715 ret = reg_node(pRExC_state, EOL);
2716 Set_Node_Length(ret, 1); /* MJD */
2719 nextchar(pRExC_state);
2720 if (RExC_flags16 & PMf_SINGLELINE)
2721 ret = reg_node(pRExC_state, SANY);
2723 ret = reg_node(pRExC_state, REG_ANY);
2724 *flagp |= HASWIDTH|SIMPLE;
2726 Set_Node_Length(ret, 1); /* MJD */
2730 char *oregcomp_parse = ++RExC_parse;
2731 ret = regclass(pRExC_state);
2732 if (*RExC_parse != ']') {
2733 RExC_parse = oregcomp_parse;
2734 vFAIL("Unmatched [");
2736 nextchar(pRExC_state);
2737 *flagp |= HASWIDTH|SIMPLE;
2738 Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */
2742 nextchar(pRExC_state);
2743 ret = reg(pRExC_state, 1, &flags);
2745 if (flags & TRYAGAIN) {
2746 if (RExC_parse == RExC_end) {
2747 /* Make parent create an empty node if needed. */
2755 *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE);
2759 if (flags & TRYAGAIN) {
2763 vFAIL("Internal urp");
2764 /* Supposed to be caught earlier. */
2767 if (!regcurly(RExC_parse)) {
2776 vFAIL("Quantifier follows nothing");
2779 switch (*++RExC_parse) {
2781 RExC_seen_zerolen++;
2782 ret = reg_node(pRExC_state, SBOL);
2784 nextchar(pRExC_state);
2785 Set_Node_Length(ret, 2); /* MJD */
2788 ret = reg_node(pRExC_state, GPOS);
2789 RExC_seen |= REG_SEEN_GPOS;
2791 nextchar(pRExC_state);
2792 Set_Node_Length(ret, 2); /* MJD */
2795 ret = reg_node(pRExC_state, SEOL);
2797 nextchar(pRExC_state);
2800 ret = reg_node(pRExC_state, EOS);
2802 RExC_seen_zerolen++; /* Do not optimize RE away */
2803 nextchar(pRExC_state);
2804 Set_Node_Length(ret, 2); /* MJD */
2807 ret = reg_node(pRExC_state, CANY);
2808 RExC_seen |= REG_SEEN_CANY;
2809 *flagp |= HASWIDTH|SIMPLE;
2810 nextchar(pRExC_state);
2811 Set_Node_Length(ret, 2); /* MJD */
2814 ret = reg_node(pRExC_state, CLUMP);
2816 nextchar(pRExC_state);
2817 Set_Node_Length(ret, 2); /* MJD */
2820 ret = reg_node(pRExC_state, LOC ? ALNUML : ALNUM);
2821 *flagp |= HASWIDTH|SIMPLE;
2822 nextchar(pRExC_state);
2823 Set_Node_Length(ret, 2); /* MJD */
2826 ret = reg_node(pRExC_state, LOC ? NALNUML : NALNUM);
2827 *flagp |= HASWIDTH|SIMPLE;
2828 nextchar(pRExC_state);
2829 Set_Node_Length(ret, 2); /* MJD */
2832 RExC_seen_zerolen++;
2833 RExC_seen |= REG_SEEN_LOOKBEHIND;
2834 ret = reg_node(pRExC_state, LOC ? BOUNDL : BOUND);
2836 nextchar(pRExC_state);
2837 Set_Node_Length(ret, 2); /* MJD */
2840 RExC_seen_zerolen++;
2841 RExC_seen |= REG_SEEN_LOOKBEHIND;
2842 ret = reg_node(pRExC_state, LOC ? NBOUNDL : NBOUND);
2844 nextchar(pRExC_state);
2845 Set_Node_Length(ret, 2); /* MJD */
2848 ret = reg_node(pRExC_state, LOC ? SPACEL : SPACE);
2849 *flagp |= HASWIDTH|SIMPLE;
2850 nextchar(pRExC_state);
2851 Set_Node_Length(ret, 2); /* MJD */
2854 ret = reg_node(pRExC_state, LOC ? NSPACEL : NSPACE);
2855 *flagp |= HASWIDTH|SIMPLE;
2856 nextchar(pRExC_state);
2857 Set_Node_Length(ret, 2); /* MJD */
2860 ret = reg_node(pRExC_state, DIGIT);
2861 *flagp |= HASWIDTH|SIMPLE;
2862 nextchar(pRExC_state);
2863 Set_Node_Length(ret, 2); /* MJD */
2866 ret = reg_node(pRExC_state, NDIGIT);
2867 *flagp |= HASWIDTH|SIMPLE;
2868 nextchar(pRExC_state);
2869 Set_Node_Length(ret, 2); /* MJD */
2874 char* oldregxend = RExC_end;
2875 char* parse_start = RExC_parse;
2877 if (RExC_parse[1] == '{') {
2878 /* a lovely hack--pretend we saw [\pX] instead */
2879 RExC_end = strchr(RExC_parse, '}');
2882 RExC_end = oldregxend;
2883 vFAIL("Missing right brace on \\p{}");
2888 RExC_end = RExC_parse + 2;
2891 ret = regclass(pRExC_state);
2893 RExC_end = oldregxend;
2895 Set_Node_Cur_Length(ret); /* MJD */
2896 nextchar(pRExC_state);
2897 *flagp |= HASWIDTH|SIMPLE;
2910 case '1': case '2': case '3': case '4':
2911 case '5': case '6': case '7': case '8': case '9':
2913 I32 num = atoi(RExC_parse);
2915 if (num > 9 && num >= RExC_npar)
2918 char * parse_start = RExC_parse - 1; /* MJD */
2919 while (isDIGIT(*RExC_parse))
2922 if (!SIZE_ONLY && num > RExC_rx->nparens)
2923 vFAIL("Reference to nonexistent group");
2925 ret = reganode(pRExC_state, FOLD
2926 ? (LOC ? REFFL : REFF)
2930 /* override incorrect value set in reganode MJD */
2931 Set_Node_Offset(ret, parse_start+1);
2932 Set_Node_Cur_Length(ret); /* MJD */
2934 nextchar(pRExC_state);
2939 if (RExC_parse >= RExC_end)
2940 FAIL("Trailing \\");
2943 /* Do not generate `unrecognized' warnings here, we fall
2944 back into the quick-grab loop below */
2950 if (RExC_flags16 & PMf_EXTENDED) {
2951 while (RExC_parse < RExC_end && *RExC_parse != '\n') RExC_parse++;
2952 if (RExC_parse < RExC_end)
2958 register STRLEN len;
2964 parse_start = RExC_parse - 1;
2969 ret = reg_node(pRExC_state, FOLD
2970 ? (LOC ? EXACTFL : EXACTF)
2973 for (len = 0, p = RExC_parse - 1;
2974 len < 127 && p < RExC_end;
2979 if (RExC_flags16 & PMf_EXTENDED)
2980 p = regwhite(p, RExC_end);
3025 ender = ASCII_TO_NATIVE('\033');
3029 ender = ASCII_TO_NATIVE('\007');
3034 char* e = strchr(p, '}');
3038 vFAIL("Missing right brace on \\x{}");
3041 numlen = 1; /* allow underscores */
3042 ender = (UV)scan_hex(p + 1, e - p - 1, &numlen);
3045 /* numlen is generous */
3046 if (numlen + len >= 127) {
3054 numlen = 0; /* disallow underscores */
3055 ender = (UV)scan_hex(p, 2, &numlen);
3061 ender = UCHARAT(p++);
3062 ender = toCTRL(ender);
3064 case '0': case '1': case '2': case '3':case '4':
3065 case '5': case '6': case '7': case '8':case '9':
3067 (isDIGIT(p[1]) && atoi(p) >= RExC_npar) ) {
3068 numlen = 0; /* disallow underscores */
3069 ender = (UV)scan_oct(p, 3, &numlen);
3079 FAIL("Trailing \\");
3082 if (!SIZE_ONLY && ckWARN(WARN_REGEXP) && isALPHA(*p))
3083 vWARN2(p +1, "Unrecognized escape \\%c passed through", *p);
3084 goto normal_default;
3089 if (UTF8_IS_START(*p) && UTF) {
3090 ender = utf8n_to_uvchr((U8*)p, RExC_end - p,
3098 if (RExC_flags16 & PMf_EXTENDED)
3099 p = regwhite(p, RExC_end);
3102 ender = toLOWER_LC_uvchr(ender);
3104 ender = toLOWER_uni(ender);
3106 if (ISMULT2(p)) { /* Back off on ?+*. */
3109 else if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(ender)) && UTF) {
3110 reguni(pRExC_state, ender, s, &numlen);
3120 if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(ender)) && UTF) {
3121 reguni(pRExC_state, ender, s, &numlen);
3130 Set_Node_Cur_Length(ret); /* MJD */
3131 nextchar(pRExC_state);
3133 /* len is STRLEN which is unsigned, need to copy to signed */
3136 vFAIL("Internal disaster");
3145 RExC_size += STR_SZ(len);
3147 RExC_emit += STR_SZ(len);
3156 S_regwhite(pTHX_ char *p, char *e)
3161 else if (*p == '#') {
3164 } while (p < e && *p != '\n');
3172 /* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]].
3173 Character classes ([:foo:]) can also be negated ([:^foo:]).
3174 Returns a named class id (ANYOF_XXX) if successful, -1 otherwise.
3175 Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed,
3176 but trigger warnings because they are currently unimplemented. */
3178 S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value)
3181 I32 namedclass = OOB_NAMEDCLASS;
3183 if (value == '[' && RExC_parse + 1 < RExC_end &&
3184 /* I smell either [: or [= or [. -- POSIX has been here, right? */
3185 (*RExC_parse == ':' ||
3186 *RExC_parse == '=' ||
3187 *RExC_parse == '.')) {
3188 char c = *RExC_parse;
3189 char* s = RExC_parse++;
3191 while (RExC_parse < RExC_end && *RExC_parse != c)
3193 if (RExC_parse == RExC_end)
3194 /* Grandfather lone [:, [=, [. */
3197 char* t = RExC_parse++; /* skip over the c */
3199 if (*RExC_parse == ']') {
3200 RExC_parse++; /* skip over the ending ] */
3203 I32 complement = *posixcc == '^' ? *posixcc++ : 0;
3204 I32 skip = 5; /* the most common skip */
3208 if (strnEQ(posixcc, "alnum", 5))
3210 complement ? ANYOF_NALNUMC : ANYOF_ALNUMC;
3211 else if (strnEQ(posixcc, "alpha", 5))
3213 complement ? ANYOF_NALPHA : ANYOF_ALPHA;
3214 else if (strnEQ(posixcc, "ascii", 5))
3216 complement ? ANYOF_NASCII : ANYOF_ASCII;
3219 if (strnEQ(posixcc, "blank", 5))
3221 complement ? ANYOF_NBLANK : ANYOF_BLANK;
3224 if (strnEQ(posixcc, "cntrl", 5))
3226 complement ? ANYOF_NCNTRL : ANYOF_CNTRL;
3229 if (strnEQ(posixcc, "digit", 5))
3231 complement ? ANYOF_NDIGIT : ANYOF_DIGIT;
3234 if (strnEQ(posixcc, "graph", 5))
3236 complement ? ANYOF_NGRAPH : ANYOF_GRAPH;
3239 if (strnEQ(posixcc, "lower", 5))
3241 complement ? ANYOF_NLOWER : ANYOF_LOWER;
3244 if (strnEQ(posixcc, "print", 5))
3246 complement ? ANYOF_NPRINT : ANYOF_PRINT;
3247 else if (strnEQ(posixcc, "punct", 5))
3249 complement ? ANYOF_NPUNCT : ANYOF_PUNCT;
3252 if (strnEQ(posixcc, "space", 5))
3254 complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC;
3257 if (strnEQ(posixcc, "upper", 5))
3259 complement ? ANYOF_NUPPER : ANYOF_UPPER;
3261 case 'w': /* this is not POSIX, this is the Perl \w */
3262 if (strnEQ(posixcc, "word", 4)) {
3264 complement ? ANYOF_NALNUM : ANYOF_ALNUM;
3269 if (strnEQ(posixcc, "xdigit", 6)) {
3271 complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT;
3276 if (namedclass == OOB_NAMEDCLASS ||
3277 posixcc[skip] != ':' ||
3278 posixcc[skip+1] != ']')
3280 Simple_vFAIL3("POSIX class [:%.*s:] unknown",
3283 } else if (!SIZE_ONLY) {
3284 /* [[=foo=]] and [[.foo.]] are still future. */
3286 /* adjust RExC_parse so the warning shows after
3288 while (*RExC_parse && *RExC_parse != ']')
3290 Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
3293 /* Maternal grandfather:
3294 * "[:" ending in ":" but not in ":]" */
3304 S_checkposixcc(pTHX_ RExC_state_t *pRExC_state)
3306 if (!SIZE_ONLY && ckWARN(WARN_REGEXP) &&
3307 (*RExC_parse == ':' ||
3308 *RExC_parse == '=' ||
3309 *RExC_parse == '.')) {
3310 char *s = RExC_parse;
3313 while(*s && isALNUM(*s))
3315 if (*s && c == *s && s[1] == ']') {
3316 vWARN3(s+2, "POSIX syntax [%c %c] belongs inside character classes", c, c);
3318 /* [[=foo=]] and [[.foo.]] are still future. */
3319 if (c == '=' || c == '.')
3321 /* adjust RExC_parse so the error shows after
3323 while (*RExC_parse && *RExC_parse++ != ']')
3325 Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c);
3332 S_regclass(pTHX_ RExC_state_t *pRExC_state)
3335 register IV prevvalue = OOB_UNICODE;
3336 register IV range = 0;
3337 register regnode *ret;
3340 char *rangebegin = 0;
3341 bool need_class = 0;
3342 SV *listsv = Nullsv;
3345 bool optimize_invert = TRUE;
3347 ret = reganode(pRExC_state, ANYOF, 0);
3350 ANYOF_FLAGS(ret) = 0;
3352 if (*RExC_parse == '^') { /* Complement of range. */
3356 ANYOF_FLAGS(ret) |= ANYOF_INVERT;
3360 RExC_size += ANYOF_SKIP;
3362 RExC_emit += ANYOF_SKIP;
3364 ANYOF_FLAGS(ret) |= ANYOF_FOLD;
3366 ANYOF_FLAGS(ret) |= ANYOF_LOCALE;
3367 ANYOF_BITMAP_ZERO(ret);
3368 listsv = newSVpvn("# comment\n", 10);
3371 if (!SIZE_ONLY && ckWARN(WARN_REGEXP))
3372 checkposixcc(pRExC_state);
3374 if (*RExC_parse == ']' || *RExC_parse == '-')
3375 goto charclassloop; /* allow 1st char to be ] or - */
3377 while (RExC_parse < RExC_end && *RExC_parse != ']') {
3381 namedclass = OOB_NAMEDCLASS; /* initialize as illegal */
3384 rangebegin = RExC_parse;
3386 value = utf8n_to_uvchr((U8*)RExC_parse,
3387 RExC_end - RExC_parse,
3389 RExC_parse += numlen;
3392 value = UCHARAT(RExC_parse++);
3394 namedclass = regpposixcc(pRExC_state, value);
3395 else if (value == '\\') {
3397 value = utf8n_to_uvchr((U8*)RExC_parse,
3398 RExC_end - RExC_parse,
3400 RExC_parse += numlen;
3403 value = UCHARAT(RExC_parse++);
3404 /* Some compilers cannot handle switching on 64-bit integer
3405 * values, therefore value cannot be an UV. Yes, this will
3406 * be a problem later if we want switch on Unicode.
3407 * A similar issue a little bit later when switching on
3408 * namedclass. --jhi */
3409 switch ((I32)value) {
3410 case 'w': namedclass = ANYOF_ALNUM; break;
3411 case 'W': namedclass = ANYOF_NALNUM; break;
3412 case 's': namedclass = ANYOF_SPACE; break;
3413 case 'S': namedclass = ANYOF_NSPACE; break;
3414 case 'd': namedclass = ANYOF_DIGIT; break;
3415 case 'D': namedclass = ANYOF_NDIGIT; break;
3418 if (*RExC_parse == '{') {
3419 e = strchr(RExC_parse++, '}');
3421 vFAIL("Missing right brace on \\p{}");
3430 Perl_sv_catpvf(aTHX_ listsv,
3431 "+utf8::%.*s\n", (int)n, RExC_parse);
3433 Perl_sv_catpvf(aTHX_ listsv,
3434 "!utf8::%.*s\n", (int)n, RExC_parse);
3437 ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
3439 case 'n': value = '\n'; break;
3440 case 'r': value = '\r'; break;
3441 case 't': value = '\t'; break;
3442 case 'f': value = '\f'; break;
3443 case 'b': value = '\b'; break;
3444 case 'e': value = ASCII_TO_NATIVE('\033');break;
3445 case 'a': value = ASCII_TO_NATIVE('\007');break;
3447 if (*RExC_parse == '{') {
3448 e = strchr(RExC_parse++, '}');
3450 vFAIL("Missing right brace on \\x{}");
3451 numlen = 1; /* allow underscores */
3452 value = (UV)scan_hex(RExC_parse,
3458 numlen = 0; /* disallow underscores */
3459 value = (UV)scan_hex(RExC_parse, 2, &numlen);
3460 RExC_parse += numlen;
3464 value = UCHARAT(RExC_parse++);
3465 value = toCTRL(value);
3467 case '0': case '1': case '2': case '3': case '4':
3468 case '5': case '6': case '7': case '8': case '9':
3469 numlen = 0; /* disallow underscores */
3470 value = (UV)scan_oct(--RExC_parse, 3, &numlen);
3471 RExC_parse += numlen;
3474 if (!SIZE_ONLY && ckWARN(WARN_REGEXP) && isALPHA(value))
3476 "Unrecognized escape \\%c in character class passed through",
3480 } /* end of \blah */
3482 if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */
3484 if (!SIZE_ONLY && !need_class)
3485 ANYOF_CLASS_ZERO(ret);
3489 /* a bad range like a-\d, a-[:digit:] ? */
3492 if (ckWARN(WARN_REGEXP))
3494 "False [] range \"%*.*s\"",
3495 RExC_parse - rangebegin,
3496 RExC_parse - rangebegin,
3498 if (prevvalue < 256) {
3499 ANYOF_BITMAP_SET(ret, prevvalue);
3500 ANYOF_BITMAP_SET(ret, '-');
3503 ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
3504 Perl_sv_catpvf(aTHX_ listsv,
3505 "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-');
3509 range = 0; /* this was not a true range */
3513 if (namedclass > OOB_NAMEDCLASS)
3514 optimize_invert = FALSE;
3515 /* Possible truncation here but in some 64-bit environments
3516 * the compiler gets heartburn about switch on 64-bit values.
3517 * A similar issue a little earlier when switching on value.
3519 switch ((I32)namedclass) {
3522 ANYOF_CLASS_SET(ret, ANYOF_ALNUM);
3524 for (value = 0; value < 256; value++)
3526 ANYOF_BITMAP_SET(ret, value);
3528 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsWord\n");
3532 ANYOF_CLASS_SET(ret, ANYOF_NALNUM);
3534 for (value = 0; value < 256; value++)
3535 if (!isALNUM(value))
3536 ANYOF_BITMAP_SET(ret, value);
3538 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsWord\n");
3542 ANYOF_CLASS_SET(ret, ANYOF_ALNUMC);
3544 for (value = 0; value < 256; value++)
3545 if (isALNUMC(value))
3546 ANYOF_BITMAP_SET(ret, value);
3548 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsAlnum\n");
3552 ANYOF_CLASS_SET(ret, ANYOF_NALNUMC);
3554 for (value = 0; value < 256; value++)
3555 if (!isALNUMC(value))
3556 ANYOF_BITMAP_SET(ret, value);
3558 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsAlnum\n");
3562 ANYOF_CLASS_SET(ret, ANYOF_ALPHA);
3564 for (value = 0; value < 256; value++)
3566 ANYOF_BITMAP_SET(ret, value);
3568 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsAlpha\n");
3572 ANYOF_CLASS_SET(ret, ANYOF_NALPHA);
3574 for (value = 0; value < 256; value++)
3575 if (!isALPHA(value))
3576 ANYOF_BITMAP_SET(ret, value);
3578 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsAlpha\n");
3582 ANYOF_CLASS_SET(ret, ANYOF_ASCII);
3585 for (value = 0; value < 128; value++)
3586 ANYOF_BITMAP_SET(ret, value);
3588 for (value = 0; value < 256; value++) {
3590 ANYOF_BITMAP_SET(ret, value);
3594 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsASCII\n");
3598 ANYOF_CLASS_SET(ret, ANYOF_NASCII);
3601 for (value = 128; value < 256; value++)
3602 ANYOF_BITMAP_SET(ret, value);
3604 for (value = 0; value < 256; value++) {
3605 if (!isASCII(value))
3606 ANYOF_BITMAP_SET(ret, value);
3610 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsASCII\n");
3614 ANYOF_CLASS_SET(ret, ANYOF_BLANK);
3616 for (value = 0; value < 256; value++)
3618 ANYOF_BITMAP_SET(ret, value);
3620 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsBlank\n");
3624 ANYOF_CLASS_SET(ret, ANYOF_NBLANK);
3626 for (value = 0; value < 256; value++)
3627 if (!isBLANK(value))
3628 ANYOF_BITMAP_SET(ret, value);
3630 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsBlank\n");
3634 ANYOF_CLASS_SET(ret, ANYOF_CNTRL);
3636 for (value = 0; value < 256; value++)
3638 ANYOF_BITMAP_SET(ret, value);
3640 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsCntrl\n");
3644 ANYOF_CLASS_SET(ret, ANYOF_NCNTRL);
3646 for (value = 0; value < 256; value++)
3647 if (!isCNTRL(value))
3648 ANYOF_BITMAP_SET(ret, value);
3650 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsCntrl\n");
3654 ANYOF_CLASS_SET(ret, ANYOF_DIGIT);
3656 /* consecutive digits assumed */
3657 for (value = '0'; value <= '9'; value++)
3658 ANYOF_BITMAP_SET(ret, value);
3660 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsDigit\n");
3664 ANYOF_CLASS_SET(ret, ANYOF_NDIGIT);
3666 /* consecutive digits assumed */
3667 for (value = 0; value < '0'; value++)
3668 ANYOF_BITMAP_SET(ret, value);
3669 for (value = '9' + 1; value < 256; value++)
3670 ANYOF_BITMAP_SET(ret, value);
3672 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsDigit\n");
3676 ANYOF_CLASS_SET(ret, ANYOF_GRAPH);
3678 for (value = 0; value < 256; value++)
3680 ANYOF_BITMAP_SET(ret, value);
3682 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsGraph\n");
3686 ANYOF_CLASS_SET(ret, ANYOF_NGRAPH);
3688 for (value = 0; value < 256; value++)
3689 if (!isGRAPH(value))
3690 ANYOF_BITMAP_SET(ret, value);
3692 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsGraph\n");
3696 ANYOF_CLASS_SET(ret, ANYOF_LOWER);
3698 for (value = 0; value < 256; value++)
3700 ANYOF_BITMAP_SET(ret, value);
3702 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsLower\n");
3706 ANYOF_CLASS_SET(ret, ANYOF_NLOWER);
3708 for (value = 0; value < 256; value++)
3709 if (!isLOWER(value))
3710 ANYOF_BITMAP_SET(ret, value);
3712 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsLower\n");
3716 ANYOF_CLASS_SET(ret, ANYOF_PRINT);
3718 for (value = 0; value < 256; value++)
3720 ANYOF_BITMAP_SET(ret, value);
3722 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsPrint\n");
3726 ANYOF_CLASS_SET(ret, ANYOF_NPRINT);
3728 for (value = 0; value < 256; value++)
3729 if (!isPRINT(value))
3730 ANYOF_BITMAP_SET(ret, value);
3732 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsPrint\n");
3736 ANYOF_CLASS_SET(ret, ANYOF_PSXSPC);
3738 for (value = 0; value < 256; value++)
3739 if (isPSXSPC(value))
3740 ANYOF_BITMAP_SET(ret, value);
3742 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsSpace\n");
3746 ANYOF_CLASS_SET(ret, ANYOF_NPSXSPC);
3748 for (value = 0; value < 256; value++)
3749 if (!isPSXSPC(value))
3750 ANYOF_BITMAP_SET(ret, value);
3752 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsSpace\n");
3756 ANYOF_CLASS_SET(ret, ANYOF_PUNCT);
3758 for (value = 0; value < 256; value++)
3760 ANYOF_BITMAP_SET(ret, value);
3762 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsPunct\n");
3766 ANYOF_CLASS_SET(ret, ANYOF_NPUNCT);
3768 for (value = 0; value < 256; value++)
3769 if (!isPUNCT(value))
3770 ANYOF_BITMAP_SET(ret, value);
3772 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsPunct\n");
3776 ANYOF_CLASS_SET(ret, ANYOF_SPACE);
3778 for (value = 0; value < 256; value++)
3780 ANYOF_BITMAP_SET(ret, value);
3782 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsSpacePerl\n");
3786 ANYOF_CLASS_SET(ret, ANYOF_NSPACE);
3788 for (value = 0; value < 256; value++)
3789 if (!isSPACE(value))
3790 ANYOF_BITMAP_SET(ret, value);
3792 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsSpacePerl\n");
3796 ANYOF_CLASS_SET(ret, ANYOF_UPPER);
3798 for (value = 0; value < 256; value++)
3800 ANYOF_BITMAP_SET(ret, value);
3802 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsUpper\n");
3806 ANYOF_CLASS_SET(ret, ANYOF_NUPPER);
3808 for (value = 0; value < 256; value++)
3809 if (!isUPPER(value))
3810 ANYOF_BITMAP_SET(ret, value);
3812 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsUpper\n");
3816 ANYOF_CLASS_SET(ret, ANYOF_XDIGIT);
3818 for (value = 0; value < 256; value++)
3819 if (isXDIGIT(value))
3820 ANYOF_BITMAP_SET(ret, value);
3822 Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsXDigit\n");
3826 ANYOF_CLASS_SET(ret, ANYOF_NXDIGIT);
3828 for (value = 0; value < 256; value++)
3829 if (!isXDIGIT(value))
3830 ANYOF_BITMAP_SET(ret, value);
3832 Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsXDigit\n");
3835 vFAIL("Invalid [::] class");
3839 ANYOF_FLAGS(ret) |= ANYOF_CLASS;
3842 } /* end of namedclass \blah */
3845 if (prevvalue > value) /* b-a */ {
3846 Simple_vFAIL4("Invalid [] range \"%*.*s\"",
3847 RExC_parse - rangebegin,
3848 RExC_parse - rangebegin,
3850 range = 0; /* not a valid range */
3854 prevvalue = value; /* save the beginning of the range */
3855 if (*RExC_parse == '-' && RExC_parse+1 < RExC_end &&
3856 RExC_parse[1] != ']') {
3859 /* a bad range like \w-, [:word:]- ? */
3860 if (namedclass > OOB_NAMEDCLASS) {
3861 if (ckWARN(WARN_REGEXP))
3863 "False [] range \"%*.*s\"",
3864 RExC_parse - rangebegin,
3865 RExC_parse - rangebegin,
3868 ANYOF_BITMAP_SET(ret, '-');
3870 range = 1; /* yeah, it's a range! */
3871 continue; /* but do it the next time */
3875 /* now is the next time */
3879 if (prevvalue < 256) {
3880 IV ceilvalue = value < 256 ? value : 255;
3883 if ((isLOWER(prevvalue) && isLOWER(ceilvalue)) ||
3884 (isUPPER(prevvalue) && isUPPER(ceilvalue)))
3886 if (isLOWER(prevvalue)) {
3887 for (i = prevvalue; i <= ceilvalue; i++)
3889 ANYOF_BITMAP_SET(ret, i);
3891 for (i = prevvalue; i <= ceilvalue; i++)
3893 ANYOF_BITMAP_SET(ret, i);
3898 for (i = prevvalue; i <= ceilvalue; i++)
3899 ANYOF_BITMAP_SET(ret, i);
3902 ANYOF_FLAGS(ret) |= ANYOF_UNICODE;
3903 if (prevvalue < value)
3904 Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n",
3905 (UV)prevvalue, (UV)value);
3906 else if (prevvalue == value)
3907 Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n",
3912 range = 0; /* this range (if it was one) is done now */
3916 ANYOF_FLAGS(ret) |= ANYOF_LARGE;
3918 RExC_size += ANYOF_CLASS_ADD_SKIP;
3920 RExC_emit += ANYOF_CLASS_ADD_SKIP;
3923 /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */
3925 /* If the only flag is folding (plus possibly inversion). */
3926 ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD)
3928 for (value = 0; value < 256; ++value) {
3929 if (ANYOF_BITMAP_TEST(ret, value)) {
3930 IV fold = PL_fold[value];
3933 ANYOF_BITMAP_SET(ret, fold);
3936 ANYOF_FLAGS(ret) &= ~ANYOF_FOLD;
3939 /* optimize inverted simple patterns (e.g. [^a-z]) */
3940 if (!SIZE_ONLY && optimize_invert &&
3941 /* If the only flag is inversion. */
3942 (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) {
3943 for (value = 0; value < ANYOF_BITMAP_SIZE; ++value)
3944 ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL;
3945 ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL;
3952 av_store(av, 0, listsv);
3953 av_store(av, 1, NULL);
3954 rv = newRV_noinc((SV*)av);
3955 n = add_data(pRExC_state, 1, "s");
3956 RExC_rx->data->data[n] = (void*)rv;
3964 S_nextchar(pTHX_ RExC_state_t *pRExC_state)
3966 char* retval = RExC_parse++;
3969 if (*RExC_parse == '(' && RExC_parse[1] == '?' &&
3970 RExC_parse[2] == '#') {
3971 while (*RExC_parse && *RExC_parse != ')')
3976 if (RExC_flags16 & PMf_EXTENDED) {
3977 if (isSPACE(*RExC_parse)) {
3981 else if (*RExC_parse == '#') {
3982 while (*RExC_parse && *RExC_parse != '\n')
3993 - reg_node - emit a node
3995 STATIC regnode * /* Location. */
3996 S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op)
3998 register regnode *ret;
3999 register regnode *ptr;
4003 SIZE_ALIGN(RExC_size);
4008 NODE_ALIGN_FILL(ret);
4010 FILL_ADVANCE_NODE(ptr, op);
4011 if (RExC_offsets) { /* MJD */
4012 MJD_OFFSET_DEBUG((stderr, "%s:%u: (op %s) %s %u <- %u (len %u) (max %u).\n",
4013 "reg_node", __LINE__,
4015 RExC_emit - RExC_emit_start > RExC_offsets[0]
4016 ? "Overwriting end of array!\n" : "OK",
4017 RExC_emit - RExC_emit_start,
4018 RExC_parse - RExC_start,
4020 Set_Node_Offset(RExC_emit, RExC_parse + (op == END));
4029 - reganode - emit a node with an argument
4031 STATIC regnode * /* Location. */
4032 S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg)
4034 register regnode *ret;
4035 register regnode *ptr;
4039 SIZE_ALIGN(RExC_size);
4044 NODE_ALIGN_FILL(ret);
4046 FILL_ADVANCE_NODE_ARG(ptr, op, arg);
4047 if (RExC_offsets) { /* MJD */
4048 MJD_OFFSET_DEBUG((stderr, "%s: %s %u <- %u (max %u).\n",
4050 RExC_emit - RExC_emit_start > RExC_offsets[0] ?
4051 "Overwriting end of array!\n" : "OK",
4052 RExC_emit - RExC_emit_start,
4053 RExC_parse - RExC_start,
4055 Set_Cur_Node_Offset;
4064 - reguni - emit (if appropriate) a Unicode character
4067 S_reguni(pTHX_ RExC_state_t *pRExC_state, UV uv, char* s, STRLEN* lenp)
4069 *lenp = SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s);
4073 - reginsert - insert an operator in front of already-emitted operand
4075 * Means relocating the operand.
4078 S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd)
4080 register regnode *src;
4081 register regnode *dst;
4082 register regnode *place;
4083 register int offset = regarglen[(U8)op];
4085 /* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */
4088 RExC_size += NODE_STEP_REGNODE + offset;
4093 RExC_emit += NODE_STEP_REGNODE + offset;
4095 while (src > opnd) {
4096 StructCopy(--src, --dst, regnode);
4097 if (RExC_offsets) { /* MJD 20010112 */
4098 MJD_OFFSET_DEBUG((stderr, "%s: %s copy %u -> %u (max %u).\n",
4100 dst - RExC_emit_start > RExC_offsets[0]
4101 ? "Overwriting end of array!\n" : "OK",
4102 src - RExC_emit_start,
4103 dst - RExC_emit_start,
4105 Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src));
4106 Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src));
4111 place = opnd; /* Op node, where operand used to be. */
4112 if (RExC_offsets) { /* MJD */
4113 MJD_OFFSET_DEBUG((stderr, "%s: %s %u <- %u (max %u).\n",
4115 place - RExC_emit_start > RExC_offsets[0]
4116 ? "Overwriting end of array!\n" : "OK",
4117 place - RExC_emit_start,
4118 RExC_parse - RExC_start,
4120 Set_Node_Offset(place, RExC_parse);
4122 src = NEXTOPER(place);
4123 FILL_ADVANCE_NODE(place, op);
4124 Zero(src, offset, regnode);
4128 - regtail - set the next-pointer at the end of a node chain of p to val.
4131 S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, regnode *val)
4133 register regnode *scan;
4134 register regnode *temp;
4139 /* Find last node. */
4142 temp = regnext(scan);
4148 if (reg_off_by_arg[OP(scan)]) {
4149 ARG_SET(scan, val - scan);
4152 NEXT_OFF(scan) = val - scan;
4157 - regoptail - regtail on operand of first argument; nop if operandless
4160 S_regoptail(pTHX_ RExC_state_t *pRExC_state, regnode *p, regnode *val)
4162 /* "Operandless" and "op != BRANCH" are synonymous in practice. */
4163 if (p == NULL || SIZE_ONLY)
4165 if (PL_regkind[(U8)OP(p)] == BRANCH) {
4166 regtail(pRExC_state, NEXTOPER(p), val);
4168 else if ( PL_regkind[(U8)OP(p)] == BRANCHJ) {
4169 regtail(pRExC_state, NEXTOPER(NEXTOPER(p)), val);
4176 - regcurly - a little FSA that accepts {\d+,?\d*}
4179 S_regcurly(pTHX_ register char *s)
4200 S_dumpuntil(pTHX_ regnode *start, regnode *node, regnode *last, SV* sv, I32 l)
4202 register U8 op = EXACT; /* Arbitrary non-END op. */
4203 register regnode *next;
4205 while (op != END && (!last || node < last)) {
4206 /* While that wasn't END last time... */
4212 next = regnext(node);
4214 if (OP(node) == OPTIMIZED)
4217 PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start),
4218 (int)(2*l + 1), "", SvPVX(sv));
4219 if (next == NULL) /* Next ptr. */
4220 PerlIO_printf(Perl_debug_log, "(0)");
4222 PerlIO_printf(Perl_debug_log, "(%"IVdf")", (IV)(next - start));
4223 (void)PerlIO_putc(Perl_debug_log, '\n');
4225 if (PL_regkind[(U8)op] == BRANCHJ) {
4226 register regnode *nnode = (OP(next) == LONGJMP
4229 if (last && nnode > last)
4231 node = dumpuntil(start, NEXTOPER(NEXTOPER(node)), nnode, sv, l + 1);
4233 else if (PL_regkind[(U8)op] == BRANCH) {
4234 node = dumpuntil(start, NEXTOPER(node), next, sv, l + 1);
4236 else if ( op == CURLY) { /* `next' might be very big: optimizer */
4237 node = dumpuntil(start, NEXTOPER(node) + EXTRA_STEP_2ARGS,
4238 NEXTOPER(node) + EXTRA_STEP_2ARGS + 1, sv, l + 1);
4240 else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) {
4241 node = dumpuntil(start, NEXTOPER(node) + EXTRA_STEP_2ARGS,
4244 else if ( op == PLUS || op == STAR) {
4245 node = dumpuntil(start, NEXTOPER(node), NEXTOPER(node) + 1, sv, l + 1);
4247 else if (op == ANYOF) {
4248 /* arglen 1 + class block */
4249 node += 1 + ((ANYOF_FLAGS(node) & ANYOF_LARGE)
4250 ? ANYOF_CLASS_SKIP : ANYOF_SKIP);
4251 node = NEXTOPER(node);
4253 else if (PL_regkind[(U8)op] == EXACT) {
4254 /* Literal string, where present. */
4255 node += NODE_SZ_STR(node) - 1;
4256 node = NEXTOPER(node);
4259 node = NEXTOPER(node);
4260 node += regarglen[(U8)op];
4262 if (op == CURLYX || op == OPEN)
4264 else if (op == WHILEM)
4270 #endif /* DEBUGGING */
4273 - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form
4276 Perl_regdump(pTHX_ regexp *r)
4279 SV *sv = sv_newmortal();
4281 (void)dumpuntil(r->program, r->program + 1, NULL, sv, 0);
4283 /* Header fields of interest. */
4284 if (r->anchored_substr)
4285 PerlIO_printf(Perl_debug_log,
4286 "anchored `%s%.*s%s'%s at %"IVdf" ",
4288 (int)(SvCUR(r->anchored_substr) - (SvTAIL(r->anchored_substr)!=0)),
4289 SvPVX(r->anchored_substr),
4291 SvTAIL(r->anchored_substr) ? "$" : "",
4292 (IV)r->anchored_offset);
4293 if (r->float_substr)
4294 PerlIO_printf(Perl_debug_log,
4295 "floating `%s%.*s%s'%s at %"IVdf"..%"UVuf" ",
4297 (int)(SvCUR(r->float_substr) - (SvTAIL(r->float_substr)!=0)),
4298 SvPVX(r->float_substr),
4300 SvTAIL(r->float_substr) ? "$" : "",
4301 (IV)r->float_min_offset, (UV)r->float_max_offset);
4302 if (r->check_substr)
4303 PerlIO_printf(Perl_debug_log,
4304 r->check_substr == r->float_substr
4305 ? "(checking floating" : "(checking anchored");
4306 if (r->reganch & ROPT_NOSCAN)
4307 PerlIO_printf(Perl_debug_log, " noscan");
4308 if (r->reganch & ROPT_CHECK_ALL)
4309 PerlIO_printf(Perl_debug_log, " isall");
4310 if (r->check_substr)
4311 PerlIO_printf(Perl_debug_log, ") ");
4313 if (r->regstclass) {
4314 regprop(sv, r->regstclass);
4315 PerlIO_printf(Perl_debug_log, "stclass `%s' ", SvPVX(sv));
4317 if (r->reganch & ROPT_ANCH) {
4318 PerlIO_printf(Perl_debug_log, "anchored");
4319 if (r->reganch & ROPT_ANCH_BOL)
4320 PerlIO_printf(Perl_debug_log, "(BOL)");
4321 if (r->reganch & ROPT_ANCH_MBOL)
4322 PerlIO_printf(Perl_debug_log, "(MBOL)");
4323 if (r->reganch & ROPT_ANCH_SBOL)
4324 PerlIO_printf(Perl_debug_log, "(SBOL)");
4325 if (r->reganch & ROPT_ANCH_GPOS)
4326 PerlIO_printf(Perl_debug_log, "(GPOS)");
4327 PerlIO_putc(Perl_debug_log, ' ');
4329 if (r->reganch & ROPT_GPOS_SEEN)
4330 PerlIO_printf(Perl_debug_log, "GPOS ");
4331 if (r->reganch & ROPT_SKIP)
4332 PerlIO_printf(Perl_debug_log, "plus ");
4333 if (r->reganch & ROPT_IMPLICIT)
4334 PerlIO_printf(Perl_debug_log, "implicit ");
4335 PerlIO_printf(Perl_debug_log, "minlen %ld ", (long) r->minlen);
4336 if (r->reganch & ROPT_EVAL_SEEN)
4337 PerlIO_printf(Perl_debug_log, "with eval ");
4338 PerlIO_printf(Perl_debug_log, "\n");
4341 U32 len = r->offsets[0];
4342 PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)r->offsets[0]);
4343 for (i = 1; i <= len; i++)
4344 PerlIO_printf(Perl_debug_log, "%"UVuf"[%"UVuf"] ",
4345 (UV)r->offsets[i*2-1],
4346 (UV)r->offsets[i*2]);
4347 PerlIO_printf(Perl_debug_log, "\n");
4349 #endif /* DEBUGGING */
4355 S_put_byte(pTHX_ SV *sv, int c)
4357 if (isCNTRL(c) || c == 255 || !isPRINT(c))
4358 Perl_sv_catpvf(aTHX_ sv, "\\%o", c);
4359 else if (c == '-' || c == ']' || c == '\\' || c == '^')
4360 Perl_sv_catpvf(aTHX_ sv, "\\%c", c);
4362 Perl_sv_catpvf(aTHX_ sv, "%c", c);
4365 #endif /* DEBUGGING */
4368 - regprop - printable representation of opcode
4371 Perl_regprop(pTHX_ SV *sv, regnode *o)
4376 sv_setpvn(sv, "", 0);
4377 if (OP(o) >= reg_num) /* regnode.type is unsigned */
4378 /* It would be nice to FAIL() here, but this may be called from
4379 regexec.c, and it would be hard to supply pRExC_state. */
4380 Perl_croak(aTHX_ "Corrupted regexp opcode");
4381 sv_catpv(sv, (char*)reg_name[OP(o)]); /* Take off const! */
4383 k = PL_regkind[(U8)OP(o)];
4386 Perl_sv_catpvf(aTHX_ sv, " <%s%.*s%s>", PL_colors[0],
4387 STR_LEN(o), STRING(o), PL_colors[1]);
4388 else if (k == CURLY) {
4389 if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX)
4390 Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */
4391 Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o));
4393 else if (k == WHILEM && o->flags) /* Ordinal/of */
4394 Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4);
4395 else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP )
4396 Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */
4397 else if (k == LOGICAL)
4398 Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */
4399 else if (k == ANYOF) {
4400 int i, rangestart = -1;
4401 U8 flags = ANYOF_FLAGS(o);
4402 const char * const anyofs[] = { /* Should be syncronized with
4403 * ANYOF_ #xdefines in regcomp.h */
4436 if (flags & ANYOF_LOCALE)
4437 sv_catpv(sv, "{loc}");
4438 if (flags & ANYOF_FOLD)
4439 sv_catpv(sv, "{i}");
4440 Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]);
4441 if (flags & ANYOF_INVERT)
4443 for (i = 0; i <= 256; i++) {
4444 if (i < 256 && ANYOF_BITMAP_TEST(o,i)) {
4445 if (rangestart == -1)
4447 } else if (rangestart != -1) {
4448 if (i <= rangestart + 3)
4449 for (; rangestart < i; rangestart++)
4450 put_byte(sv, rangestart);
4452 put_byte(sv, rangestart);
4454 put_byte(sv, i - 1);
4460 if (o->flags & ANYOF_CLASS)
4461 for (i = 0; i < sizeof(anyofs)/sizeof(char*); i++)
4462 if (ANYOF_CLASS_TEST(o,i))
4463 sv_catpv(sv, anyofs[i]);
4465 if (flags & ANYOF_UNICODE)
4466 sv_catpv(sv, "{unicode}");
4467 else if (flags & ANYOF_UNICODE_ALL)
4468 sv_catpv(sv, "{all-unicode}");
4472 SV *sw = regclass_swash(o, FALSE, &lv);
4477 U8 s[UTF8_MAXLEN+1];
4479 for (i = 0; i <= 256; i++) { /* just the first 256 */
4480 U8 *e = uvchr_to_utf8(s, i);
4482 if (i < 256 && swash_fetch(sw, s, TRUE)) {
4483 if (rangestart == -1)
4485 } else if (rangestart != -1) {
4488 if (i <= rangestart + 3)
4489 for (; rangestart < i; rangestart++) {
4490 for(e = uvchr_to_utf8(s, rangestart), p = s; p < e; p++)
4494 for (e = uvchr_to_utf8(s, rangestart), p = s; p < e; p++)
4497 for (e = uvchr_to_utf8(s, i - 1), p = s; p < e; p++)
4504 sv_catpv(sv, "..."); /* et cetera */
4508 char *s = savepv(SvPVX(lv));
4511 while(*s && *s != '\n') s++;
4532 Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]);
4534 else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH))
4535 Perl_sv_catpvf(aTHX_ sv, "[-%d]", o->flags);
4536 #endif /* DEBUGGING */
4540 Perl_re_intuit_string(pTHX_ regexp *prog)
4541 { /* Assume that RE_INTUIT is set */
4544 char *s = SvPV(prog->check_substr,n_a);
4546 if (!PL_colorset) reginitcolors();
4547 PerlIO_printf(Perl_debug_log,
4548 "%sUsing REx substr:%s `%s%.60s%s%s'\n",
4549 PL_colors[4],PL_colors[5],PL_colors[0],
4552 (strlen(s) > 60 ? "..." : ""));
4555 return prog->check_substr;
4559 Perl_pregfree(pTHX_ struct regexp *r)
4561 DEBUG_r(if (!PL_colorset) reginitcolors());
4563 if (!r || (--r->refcnt > 0))
4565 DEBUG_r(PerlIO_printf(Perl_debug_log,
4566 "%sFreeing REx:%s `%s%.60s%s%s'\n",
4567 PL_colors[4],PL_colors[5],PL_colors[0],
4570 (strlen(r->precomp) > 60 ? "..." : "")));
4573 Safefree(r->precomp);
4574 if (r->offsets) /* 20010421 MJD */
4575 Safefree(r->offsets);
4576 if (RX_MATCH_COPIED(r))
4577 Safefree(r->subbeg);
4579 if (r->anchored_substr)
4580 SvREFCNT_dec(r->anchored_substr);
4581 if (r->float_substr)
4582 SvREFCNT_dec(r->float_substr);
4583 Safefree(r->substrs);
4586 int n = r->data->count;
4587 AV* new_comppad = NULL;
4592 /* If you add a ->what type here, update the comment in regcomp.h */
4593 switch (r->data->what[n]) {
4595 SvREFCNT_dec((SV*)r->data->data[n]);
4598 Safefree(r->data->data[n]);
4601 new_comppad = (AV*)r->data->data[n];
4604 if (new_comppad == NULL)
4605 Perl_croak(aTHX_ "panic: pregfree comppad");
4606 old_comppad = PL_comppad;
4607 old_curpad = PL_curpad;
4608 /* Watch out for global destruction's random ordering. */
4609 if (SvTYPE(new_comppad) == SVt_PVAV) {
4610 PL_comppad = new_comppad;
4611 PL_curpad = AvARRAY(new_comppad);
4616 if (!OpREFCNT_dec((OP_4tree*)r->data->data[n])) {
4617 op_free((OP_4tree*)r->data->data[n]);
4620 PL_comppad = old_comppad;
4621 PL_curpad = old_curpad;
4622 SvREFCNT_dec((SV*)new_comppad);
4628 Perl_croak(aTHX_ "panic: regfree data code '%c'", r->data->what[n]);
4631 Safefree(r->data->what);
4634 Safefree(r->startp);
4640 - regnext - dig the "next" pointer out of a node
4642 * [Note, when REGALIGN is defined there are two places in regmatch()
4643 * that bypass this code for speed.]
4646 Perl_regnext(pTHX_ register regnode *p)
4648 register I32 offset;
4650 if (p == &PL_regdummy)
4653 offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p));
4661 S_re_croak2(pTHX_ const char* pat1,const char* pat2,...)
4664 STRLEN l1 = strlen(pat1);
4665 STRLEN l2 = strlen(pat2);
4674 Copy(pat1, buf, l1 , char);
4675 Copy(pat2, buf + l1, l2 , char);
4676 buf[l1 + l2] = '\n';
4677 buf[l1 + l2 + 1] = '\0';
4679 /* ANSI variant takes additional second argument */
4680 va_start(args, pat2);
4684 msv = vmess(buf, &args);
4686 message = SvPV(msv,l1);
4689 Copy(message, buf, l1 , char);
4690 buf[l1] = '\0'; /* Overwrite \n */
4691 Perl_croak(aTHX_ "%s", buf);
4694 /* XXX Here's a total kludge. But we need to re-enter for swash routines. */
4697 Perl_save_re_context(pTHX)
4700 SAVEPPTR(RExC_precomp); /* uncompiled string. */
4701 SAVEI32(RExC_npar); /* () count. */
4702 SAVEI32(RExC_size); /* Code size. */
4703 SAVEI16(RExC_flags16); /* are we folding, multilining? */
4704 SAVEVPTR(RExC_rx); /* from regcomp.c */
4705 SAVEI32(RExC_seen); /* from regcomp.c */
4706 SAVEI32(RExC_sawback); /* Did we see \1, ...? */
4707 SAVEI32(RExC_naughty); /* How bad is this pattern? */
4708 SAVEVPTR(RExC_emit); /* Code-emit pointer; ®dummy = don't */
4709 SAVEPPTR(RExC_end); /* End of input for compile */
4710 SAVEPPTR(RExC_parse); /* Input-scan pointer. */
4713 SAVEI32(PL_reg_flags); /* from regexec.c */
4715 SAVEPPTR(PL_reginput); /* String-input pointer. */
4716 SAVEPPTR(PL_regbol); /* Beginning of input, for ^ check. */
4717 SAVEPPTR(PL_regeol); /* End of input, for $ check. */
4718 SAVEVPTR(PL_regstartp); /* Pointer to startp array. */
4719 SAVEVPTR(PL_regendp); /* Ditto for endp. */
4720 SAVEVPTR(PL_reglastparen); /* Similarly for lastparen. */
4721 SAVEPPTR(PL_regtill); /* How far we are required to go. */
4722 SAVEGENERICPV(PL_reg_start_tmp); /* from regexec.c */
4723 PL_reg_start_tmp = 0;
4724 SAVEI32(PL_reg_start_tmpl); /* from regexec.c */
4725 PL_reg_start_tmpl = 0;
4726 SAVEVPTR(PL_regdata);
4727 SAVEI32(PL_reg_eval_set); /* from regexec.c */
4728 SAVEI32(PL_regnarrate); /* from regexec.c */
4729 SAVEVPTR(PL_regprogram); /* from regexec.c */
4730 SAVEINT(PL_regindent); /* from regexec.c */
4731 SAVEVPTR(PL_regcc); /* from regexec.c */
4732 SAVEVPTR(PL_curcop);
4733 SAVEVPTR(PL_reg_call_cc); /* from regexec.c */
4734 SAVEVPTR(PL_reg_re); /* from regexec.c */
4735 SAVEPPTR(PL_reg_ganch); /* from regexec.c */
4736 SAVESPTR(PL_reg_sv); /* from regexec.c */
4737 SAVEVPTR(PL_reg_magic); /* from regexec.c */
4738 SAVEI32(PL_reg_oldpos); /* from regexec.c */
4739 SAVEVPTR(PL_reg_oldcurpm); /* from regexec.c */
4740 SAVEVPTR(PL_reg_curpm); /* from regexec.c */
4741 SAVEI32(PL_regnpar); /* () count. */
4742 SAVEI32(PL_regsize); /* from regexec.c */
4744 SAVEPPTR(PL_reg_starttry); /* from regexec.c */
4755 clear_re(pTHXo_ void *r)
4757 ReREFCNT_dec((regexp *)r);
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