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Make the use64bits and usethreads friendlier/braver;
[perl5.git] / regexec.c
CommitLineData
a0d0e21e
LW		 1/* regexec.c
2 */
3
4/*
5 * "One Ring to rule them all, One Ring to find them..."
6 */
7
a687059c
LW		 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!
10 */
11
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.
15 */
16
e50aee73
AD		 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.
20*/
21
b9d5759e
AD		 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
26# endif
27/* need access to debugger hooks */
cad2e5aa 28# if defined(PERL_EXT_RE_DEBUG) && !defined(DEBUGGING)
b9d5759e
AD		 29# define DEBUGGING
30# endif
31#endif
32
33#ifdef PERL_IN_XSUB_RE
d06ea78c 34/* We *really* need to overwrite these symbols: */
56953603
IZ		 35# define Perl_regexec_flags my_regexec
36# define Perl_regdump my_regdump
37# define Perl_regprop my_regprop
cad2e5aa 38# define Perl_re_intuit_start my_re_intuit_start
d06ea78c
GS		 39/* *These* symbols are masked to allow static link. */
40# define Perl_pregexec my_pregexec
d88dccdf 41# define Perl_reginitcolors my_reginitcolors
c5be433b
GS		 42
43# define PERL_NO_GET_CONTEXT
56953603
IZ		 44#endif
45
f0fcb552 46/*SUPPRESS 112*/
a687059c 47/*
e50aee73 48 * pregcomp and pregexec -- regsub and regerror are not used in perl
a687059c
LW		 49 *
50 * Copyright (c) 1986 by University of Toronto.
51 * Written by Henry Spencer. Not derived from licensed software.
52 *
53 * Permission is granted to anyone to use this software for any
54 * purpose on any computer system, and to redistribute it freely,
55 * subject to the following restrictions:
56 *
57 * 1. The author is not responsible for the consequences of use of
58 * this software, no matter how awful, even if they arise
59 * from defects in it.
60 *
61 * 2. The origin of this software must not be misrepresented, either
62 * by explicit claim or by omission.
63 *
64 * 3. Altered versions must be plainly marked as such, and must not
65 * be misrepresented as being the original software.
66 *
67 **** Alterations to Henry's code are...
68 ****
4eb8286e 69 **** Copyright (c) 1991-1999, Larry Wall
a687059c 70 ****
9ef589d8
LW		 71 **** You may distribute under the terms of either the GNU General Public
72 **** License or the Artistic License, as specified in the README file.
a687059c
LW		 73 *
74 * Beware that some of this code is subtly aware of the way operator
75 * precedence is structured in regular expressions. Serious changes in
76 * regular-expression syntax might require a total rethink.
77 */
78#include "EXTERN.h"
864dbfa3 79#define PERL_IN_REGEXEC_C
a687059c 80#include "perl.h"
0f5d15d6 81
c5be433b
GS		 82#ifdef PERL_IN_XSUB_RE
83# if defined(PERL_CAPI) || defined(PERL_OBJECT)
84# include "XSUB.h"
85# endif
86#endif
87
a687059c
LW		 88#include "regcomp.h"
89
c277df42
IZ		 90#define RF_tainted 1 /* tainted information used? */
91#define RF_warned 2 /* warned about big count? */
ce862d02 92#define RF_evaled 4 /* Did an EVAL with setting? */
a0ed51b3
LW		 93#define RF_utf8 8 /* String contains multibyte chars? */
94
95#define UTF (PL_reg_flags & RF_utf8)
ce862d02
IZ		 96
97#define RS_init 1 /* eval environment created */
98#define RS_set 2 /* replsv value is set */
c277df42 99
a687059c
LW		 100#ifndef STATIC
101#define STATIC static
102#endif
103
c277df42
IZ		 104/*
105 * Forwards.
106 */
107
b8c5462f 108#define REGINCLASS(p,c) (ANYOF_FLAGS(p) ? reginclass(p,c) : ANYOF_BITMAP_TEST(p,c))
a0ed51b3
LW		 109#define REGINCLASSUTF8(f,p) (ARG1(f) ? reginclassutf8(f,p) : swash_fetch((SV*)PL_regdata->data[ARG2(f)],p))
110
111#define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv))
112#define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b)
113
dfe13c55
GS		 114#define reghop_c(pos,off) ((char*)reghop((U8*)pos, off))
115#define reghopmaybe_c(pos,off) ((char*)reghopmaybe((U8*)pos, off))
116#define HOP(pos,off) (UTF ? reghop((U8*)pos, off) : (U8*)(pos + off))
117#define HOPMAYBE(pos,off) (UTF ? reghopmaybe((U8*)pos, off) : (U8*)(pos + off))
118#define HOPc(pos,off) ((char*)HOP(pos,off))
119#define HOPMAYBEc(pos,off) ((char*)HOPMAYBE(pos,off))
a0d0e21e 120
51371543
GS		 121static void restore_pos(pTHXo_ void *arg);
122
123
76e3520e 124STATIC CHECKPOINT
cea2e8a9 125S_regcppush(pTHX_ I32 parenfloor)
a0d0e21e 126{
11343788 127 dTHR;
3280af22
NIS		 128 int retval = PL_savestack_ix;
129 int i = (PL_regsize - parenfloor) * 4;
a0d0e21e
LW		 130 int p;
131
132 SSCHECK(i + 5);
3280af22 133 for (p = PL_regsize; p > parenfloor; p--) {
cf93c79d
IZ		 134 SSPUSHINT(PL_regendp[p]);
135 SSPUSHINT(PL_regstartp[p]);
3280af22 136 SSPUSHPTR(PL_reg_start_tmp[p]);
a0d0e21e
LW		 137 SSPUSHINT(p);
138 }
3280af22
NIS		 139 SSPUSHINT(PL_regsize);
140 SSPUSHINT(*PL_reglastparen);
141 SSPUSHPTR(PL_reginput);
a0d0e21e
LW		 142 SSPUSHINT(i + 3);
143 SSPUSHINT(SAVEt_REGCONTEXT);
144 return retval;
145}
146
c277df42 147/* These are needed since we do not localize EVAL nodes: */
c3464db5
DD		 148# define REGCP_SET DEBUG_r(PerlIO_printf(Perl_debug_log, \
149 " Setting an EVAL scope, savestack=%i\n", \
3280af22 150 PL_savestack_ix)); lastcp = PL_savestack_ix
c3464db5 151
3280af22 152# define REGCP_UNWIND DEBUG_r(lastcp != PL_savestack_ix ? \
c3464db5
DD		 153 PerlIO_printf(Perl_debug_log, \
154 " Clearing an EVAL scope, savestack=%i..%i\n", \
3280af22 155 lastcp, PL_savestack_ix) : 0); regcpblow(lastcp)
c277df42 156
76e3520e 157STATIC char *
cea2e8a9 158S_regcppop(pTHX)
a0d0e21e 159{
11343788 160 dTHR;
a0d0e21e
LW		 161 I32 i = SSPOPINT;
162 U32 paren = 0;
163 char *input;
cf93c79d 164 I32 tmps;
a0d0e21e
LW		 165 assert(i == SAVEt_REGCONTEXT);
166 i = SSPOPINT;
167 input = (char *) SSPOPPTR;
3280af22
NIS		 168 *PL_reglastparen = SSPOPINT;
169 PL_regsize = SSPOPINT;
c277df42 170 for (i -= 3; i > 0; i -= 4) {
a0d0e21e 171 paren = (U32)SSPOPINT;
3280af22 172 PL_reg_start_tmp[paren] = (char *) SSPOPPTR;
cf93c79d
IZ		 173 PL_regstartp[paren] = SSPOPINT;
174 tmps = SSPOPINT;
3280af22
NIS		 175 if (paren <= *PL_reglastparen)
176 PL_regendp[paren] = tmps;
c277df42 177 DEBUG_r(
c3464db5
DD		 178 PerlIO_printf(Perl_debug_log,
179 " restoring \\%d to %d(%d)..%d%s\n",
cf93c79d
IZ		 180 paren, PL_regstartp[paren],
181 PL_reg_start_tmp[paren] - PL_bostr,
182 PL_regendp[paren],
3280af22 183 (paren > *PL_reglastparen ? "(no)" : ""));
c277df42 184 );
a0d0e21e 185 }
c277df42 186 DEBUG_r(
3280af22 187 if (*PL_reglastparen + 1 <= PL_regnpar) {
c3464db5
DD		 188 PerlIO_printf(Perl_debug_log,
189 " restoring \\%d..\\%d to undef\n",
3280af22 190 *PL_reglastparen + 1, PL_regnpar);
c277df42
IZ		 191 }
192 );
3280af22
NIS		 193 for (paren = *PL_reglastparen + 1; paren <= PL_regnpar; paren++) {
194 if (paren > PL_regsize)
cf93c79d
IZ		 195 PL_regstartp[paren] = -1;
196 PL_regendp[paren] = -1;
a0d0e21e
LW		 197 }
198 return input;
199}
200
0f5d15d6 201STATIC char *
cea2e8a9 202S_regcp_set_to(pTHX_ I32 ss)
0f5d15d6 203{
46124e9e 204 dTHR;
0f5d15d6
IZ		 205 I32 tmp = PL_savestack_ix;
206
207 PL_savestack_ix = ss;
208 regcppop();
209 PL_savestack_ix = tmp;
942e002e 210 return Nullch;
0f5d15d6
IZ		 211}
212
213typedef struct re_cc_state
214{
215 I32 ss;
216 regnode *node;
217 struct re_cc_state *prev;
218 CURCUR *cc;
219 regexp *re;
220} re_cc_state;
221
c277df42 222#define regcpblow(cp) LEAVE_SCOPE(cp)
a0d0e21e 223
a687059c 224/*
e50aee73 225 * pregexec and friends
a687059c
LW		 226 */
227
228/*
c277df42 229 - pregexec - match a regexp against a string
a687059c 230 */
c277df42 231I32
864dbfa3 232Perl_pregexec(pTHX_ register regexp *prog, char *stringarg, register char *strend,
c3464db5 233 char *strbeg, I32 minend, SV *screamer, U32 nosave)
c277df42
IZ		 234/* strend: pointer to null at end of string */
235/* strbeg: real beginning of string */
236/* minend: end of match must be >=minend after stringarg. */
237/* nosave: For optimizations. */
238{
239 return
240 regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL,
241 nosave ? 0 : REXEC_COPY_STR);
242}
0f5d15d6
IZ		 243
244STATIC void
cea2e8a9 245S_cache_re(pTHX_ regexp *prog)
0f5d15d6 246{
46124e9e 247 dTHR;
0f5d15d6
IZ		 248 PL_regprecomp = prog->precomp; /* Needed for FAIL. */
249#ifdef DEBUGGING
250 PL_regprogram = prog->program;
251#endif
252 PL_regnpar = prog->nparens;
253 PL_regdata = prog->data;
254 PL_reg_re = prog;
255}
22e551b9 256
cad2e5aa
JH		 257/*
258 * Need to implement the following flags for reg_anch:
259 *
260 * USE_INTUIT_NOML - Useful to call re_intuit_start() first
261 * USE_INTUIT_ML
262 * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer
263 * INTUIT_AUTORITATIVE_ML
264 * INTUIT_ONCE_NOML - Intuit can match in one location only.
265 * INTUIT_ONCE_ML
266 *
267 * Another flag for this function: SECOND_TIME (so that float substrs
268 * with giant delta may be not rechecked).
269 */
270
271/* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */
272
273/* If SCREAM, then sv should be compatible with strpos and strend.
274 Otherwise, only SvCUR(sv) is used to get strbeg. */
275
276/* XXXX We assume that strpos is strbeg unless sv. */
277
278char *
279Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos,
280 char *strend, U32 flags, re_scream_pos_data *data)
281{
282 I32 start_shift;
283 /* Should be nonnegative! */
284 I32 end_shift;
285 char *s;
286 char *t;
287 I32 ml_anch;
288
289 DEBUG_r( if (!PL_colorset) reginitcolors() );
290 DEBUG_r(PerlIO_printf(Perl_debug_log,
291 "%sGuessing start of match:%s `%s%.60s%s%s' against `%s%.*s%s%s'\n",
292 PL_colors[4],PL_colors[5],PL_colors[0],
293 prog->precomp,
294 PL_colors[1],
295 (strlen(prog->precomp) > 60 ? "..." : ""),
296 PL_colors[0],
297 (strend - strpos > 60 ? 60 : strend - strpos),
298 strpos, PL_colors[1],
299 (strend - strpos > 60 ? "..." : ""))
300 );
301
302 if (prog->minlen > strend - strpos)
303 goto fail;
304
305 /* XXXX Move further down? */
306 start_shift = prog->check_offset_min; /* okay to underestimate on CC */
307 /* Should be nonnegative! */
308 end_shift = prog->minlen - start_shift -
309 CHR_SVLEN(prog->check_substr) + (SvTAIL(prog->check_substr) != 0);
310
311 if (prog->reganch & ROPT_ANCH) {
312 ml_anch = !( (prog->reganch & ROPT_ANCH_SINGLE)
313 || ( (prog->reganch & ROPT_ANCH_BOL)
314 && !PL_multiline ) );
315
316 if ((prog->check_offset_min == prog->check_offset_max) && !ml_anch) {
317 /* Anchored... */
318 I32 slen;
319
320 if ( !(prog->reganch & ROPT_ANCH_GPOS) /* Checked by the caller */
321 && (sv && (strpos + SvCUR(sv) != strend)) )
322 goto fail;
323
adac82c7 324 PL_regeol = strend; /* Used in HOP() */
cad2e5aa
JH		 325 s = (char*)HOP((U8*)strpos, prog->check_offset_min);
326 if (SvTAIL(prog->check_substr)) {
327 slen = SvCUR(prog->check_substr); /* >= 1 */
328
329 if ( strend - s > slen || strend - s < slen - 1 ) {
330 s = Nullch;
331 goto finish;
332 }
333 if ( strend - s == slen && strend[-1] != '\n') {
334 s = Nullch;
335 goto finish;
336 }
337 /* Now should match s[0..slen-2] */
338 slen--;
339 if (slen && (*SvPVX(prog->check_substr) != *s
340 || (slen > 1
341 && memNE(SvPVX(prog->check_substr), s, slen))))
342 s = Nullch;
343 }
344 else if (*SvPVX(prog->check_substr) != *s
345 || ((slen = SvCUR(prog->check_substr)) > 1
346 && memNE(SvPVX(prog->check_substr), s, slen)))
347 s = Nullch;
348 else
349 s = strpos;
350 goto finish;
351 }
352 s = strpos;
353 if (!ml_anch && (s + prog->check_offset_max < strend - prog->minlen))
354 end_shift += strend - s - prog->minlen - prog->check_offset_max;
355 }
356 else {
357 ml_anch = 0;
358 s = strpos;
359 }
360
361 restart:
0033605d
JH		 362 if (end_shift < 0)
363 end_shift = 0; /* can happen when strend == strpos */
cad2e5aa
JH		 364 if (flags & REXEC_SCREAM) {
365 SV *c = prog->check_substr;
366 char *strbeg = SvPVX(sv); /* XXXX Assume PV_force() on SCREAM! */
367 I32 p = -1; /* Internal iterator of scream. */
368 I32 *pp = data ? data->scream_pos : &p;
369
370 if (PL_screamfirst[BmRARE(c)] >= 0
371 || ( BmRARE(c) == '\n'
372 && (BmPREVIOUS(c) == SvCUR(c) - 1)
373 && SvTAIL(c) ))
374 s = screaminstr(sv, prog->check_substr,
375 start_shift + (strpos - strbeg), end_shift, pp, 0);
376 else
377 s = Nullch;
378 if (data)
379 *data->scream_olds = s;
380 }
381 else
382 s = fbm_instr((unsigned char*)s + start_shift,
383 (unsigned char*)strend - end_shift,
384 prog->check_substr, PL_multiline ? FBMrf_MULTILINE : 0);
385
386 /* Update the count-of-usability, remove useless subpatterns,
387 unshift s. */
388 finish:
389 if (!s) {
390 ++BmUSEFUL(prog->check_substr); /* hooray */
391 goto fail; /* not present */
392 }
393 else if (s - strpos > prog->check_offset_max &&
394 ((prog->reganch & ROPT_UTF8)
395 ? ((t = reghopmaybe_c(s, -(prog->check_offset_max)))
396 && t >= strpos)
397 : (t = s - prog->check_offset_max) != 0) ) {
398 if (ml_anch && t[-1] != '\n') {
399 find_anchor:
400 while (t < strend - end_shift - prog->minlen) {
401 if (*t == '\n') {
402 if (t < s - prog->check_offset_min) {
403 s = t + 1;
404 goto set_useful;
405 }
406 s = t + 1;
407 goto restart;
408 }
409 t++;
410 }
411 s = Nullch;
412 goto finish;
413 }
414 s = t;
415 set_useful:
416 ++BmUSEFUL(prog->check_substr); /* hooray/2 */
417 }
418 else {
419 if (ml_anch && sv
420 && (strpos + SvCUR(sv) != strend) && strpos[-1] != '\n') {
421 t = strpos;
422 goto find_anchor;
423 }
424 if (!(prog->reganch & ROPT_NAUGHTY)
425 && --BmUSEFUL(prog->check_substr) < 0
426 && prog->check_substr == prog->float_substr) { /* boo */
427 /* If flags & SOMETHING - do not do it many times on the same match */
428 SvREFCNT_dec(prog->check_substr);
429 prog->check_substr = Nullsv; /* disable */
430 prog->float_substr = Nullsv; /* clear */
431 s = strpos;
432 prog->reganch &= ~RE_USE_INTUIT;
433 }
434 else
435 s = strpos;
436 }
437
438 DEBUG_r(PerlIO_printf(Perl_debug_log, "%sFound%s at offset %ld\n",
439 PL_colors[4],PL_colors[5], (long)(s - strpos)) );
440 return s;
441 fail:
442 DEBUG_r(PerlIO_printf(Perl_debug_log, "%sNot found...%s\n",
443 PL_colors[4],PL_colors[5]));
444 return Nullch;
445}
9661b544 446
a687059c 447/*
c277df42 448 - regexec_flags - match a regexp against a string
a687059c 449 */
79072805 450I32
864dbfa3 451Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char *strend,
22e551b9 452 char *strbeg, I32 minend, SV *sv, void *data, U32 flags)
c277df42
IZ		 453/* strend: pointer to null at end of string */
454/* strbeg: real beginning of string */
455/* minend: end of match must be >=minend after stringarg. */
456/* data: May be used for some additional optimizations. */
457/* nosave: For optimizations. */
a687059c 458{
5c0ca799 459 dTHR;
a0d0e21e 460 register char *s;
c277df42 461 register regnode *c;
a0d0e21e
LW		 462 register char *startpos = stringarg;
463 register I32 tmp;
c277df42 464 I32 minlen; /* must match at least this many chars */
a0d0e21e
LW		 465 I32 dontbother = 0; /* how many characters not to try at end */
466 CURCUR cc;
c277df42 467 I32 start_shift = 0; /* Offset of the start to find
a0ed51b3
LW		 468 constant substr. */ /* CC */
469 I32 end_shift = 0; /* Same for the end. */ /* CC */
c277df42
IZ		 470 I32 scream_pos = -1; /* Internal iterator of scream. */
471 char *scream_olds;
3280af22 472 SV* oreplsv = GvSV(PL_replgv);
a687059c 473
a0d0e21e 474 cc.cur = 0;
4633a7c4 475 cc.oldcc = 0;
3280af22 476 PL_regcc = &cc;
a0d0e21e 477
0f5d15d6 478 cache_re(prog);
a0d0e21e 479#ifdef DEBUGGING
3280af22 480 PL_regnarrate = PL_debug & 512;
a0d0e21e
LW		 481#endif
482
483 /* Be paranoid... */
484 if (prog == NULL || startpos == NULL) {
cea2e8a9 485 Perl_croak(aTHX_ "NULL regexp parameter");
a0d0e21e
LW		 486 return 0;
487 }
488
c277df42
IZ		 489 minlen = prog->minlen;
490 if (strend - startpos < minlen) goto phooey;
491
a0d0e21e 492 if (startpos == strbeg) /* is ^ valid at stringarg? */
3280af22 493 PL_regprev = '\n';
a0d0e21e 494 else {
a0ed51b3 495 PL_regprev = (U32)stringarg[-1];
3280af22
NIS		 496 if (!PL_multiline && PL_regprev == '\n')
497 PL_regprev = '\0'; /* force ^ to NOT match */
a0d0e21e 498 }
bbce6d69 499
a0d0e21e 500 /* Check validity of program. */
22c35a8c 501 if (UCHARAT(prog->program) != REG_MAGIC) {
cea2e8a9 502 Perl_croak(aTHX_ "corrupted regexp program");
a0d0e21e
LW		 503 }
504
3280af22
NIS		 505 PL_reg_flags = 0;
506 PL_reg_eval_set = 0;
a0d0e21e 507
a0ed51b3
LW		 508 if (prog->reganch & ROPT_UTF8)
509 PL_reg_flags |= RF_utf8;
510
511 /* Mark beginning of line for ^ and lookbehind. */
512 PL_regbol = startpos;
513 PL_bostr = strbeg;
9661b544 514 PL_reg_sv = sv;
a0ed51b3
LW		 515
516 /* Mark end of line for $ (and such) */
517 PL_regeol = strend;
518
519 /* see how far we have to get to not match where we matched before */
520 PL_regtill = startpos+minend;
521
0f5d15d6
IZ		 522 /* We start without call_cc context. */
523 PL_reg_call_cc = 0;
524
a0d0e21e
LW		 525 /* If there is a "must appear" string, look for it. */
526 s = startpos;
cad2e5aa
JH		 527
528 if (prog->reganch & ROPT_GPOS_SEEN) {
529 MAGIC *mg;
530
531 if (!(flags & REXEC_IGNOREPOS) && sv && SvTYPE(sv) >= SVt_PVMG
532 && SvMAGIC(sv) && (mg = mg_find(sv, 'g')) && mg->mg_len >= 0)
533 PL_reg_ganch = strbeg + mg->mg_len;
a0d0e21e 534 else
cad2e5aa
JH		 535 PL_reg_ganch = startpos;
536 if (prog->reganch & ROPT_ANCH_GPOS) {
537 if (s > PL_reg_ganch)
538 goto phooey;
539 s = PL_reg_ganch;
a0ed51b3 540 }
a0d0e21e 541 }
a687059c 542
cad2e5aa
JH		 543 if (!(flags & REXEC_CHECKED) && prog->check_substr != Nullsv) {
544 re_scream_pos_data d;
545
546 d.scream_olds = &scream_olds;
547 d.scream_pos = &scream_pos;
548 s = re_intuit_start(prog, sv, s, strend, flags, &d);
549 if (!s)
550 goto phooey; /* not present */
551 }
552
553 DEBUG_r( if (!PL_colorset) reginitcolors() );
554 DEBUG_r(PerlIO_printf(Perl_debug_log,
8d300b32
GS		 555 "%sMatching%s `%s%.60s%s%s' against `%s%.*s%s%s'\n",
556 PL_colors[4],PL_colors[5],PL_colors[0],
557 prog->precomp,
558 PL_colors[1],
c277df42 559 (strlen(prog->precomp) > 60 ? "..." : ""),
cad2e5aa 560 PL_colors[0],
c277df42 561 (strend - startpos > 60 ? 60 : strend - startpos),
8d300b32 562 startpos, PL_colors[1],
c277df42
IZ		 563 (strend - startpos > 60 ? "..." : ""))
564 );
565
a0d0e21e 566 /* Simplest case: anchored match need be tried only once. */
774d564b 567 /* [unless only anchor is BOL and multiline is set] */
22e551b9 568 if (prog->reganch & (ROPT_ANCH & ~ROPT_ANCH_GPOS)) {
cad2e5aa 569 if (s == startpos && regtry(prog, startpos))
a0d0e21e 570 goto got_it;
22e551b9
IZ		 571 else if (PL_multiline || (prog->reganch & ROPT_IMPLICIT)
572 || (prog->reganch & ROPT_ANCH_MBOL)) /* XXXX SBOL? */
774d564b 573 {
cad2e5aa
JH		 574 char *end;
575
a0d0e21e
LW		 576 if (minlen)
577 dontbother = minlen - 1;
cad2e5aa 578 end = HOPc(strend, -dontbother) - 1;
a0d0e21e 579 /* for multiline we only have to try after newlines */
cad2e5aa
JH		 580 if (prog->check_substr) {
581 while (1) {
582 if (regtry(prog, s))
a0d0e21e 583 goto got_it;
cad2e5aa
JH		 584 if (s >= end)
585 goto phooey;
586 s = re_intuit_start(prog, sv, s + 1, strend, flags, NULL);
587 if (!s)
588 goto phooey;
589 }
590 } else {
591 if (s > startpos)
592 s--;
593 while (s < end) {
594 if (*s++ == '\n') { /* don't need PL_utf8skip here */
595 if (regtry(prog, s))
596 goto got_it;
597 }
598 }
35c8bce7 599 }
35c8bce7 600 }
a0d0e21e 601 goto phooey;
22e551b9
IZ		 602 } else if (prog->reganch & ROPT_ANCH_GPOS) {
603 if (regtry(prog, PL_reg_ganch))
604 goto got_it;
605 goto phooey;
a0d0e21e 606 }
35c8bce7 607
a0d0e21e 608 /* Messy cases: unanchored match. */
c277df42
IZ		 609 if (prog->anchored_substr && prog->reganch & ROPT_SKIP) {
610 /* we have /x+whatever/ */
cad2e5aa 611 /* it must be a one character string (XXXX Except UTF?) */
c277df42 612 char ch = SvPVX(prog->anchored_substr)[0];
a0ed51b3
LW		 613 if (UTF) {
614 while (s < strend) {
615 if (*s == ch) {
616 if (regtry(prog, s)) goto got_it;
617 s += UTF8SKIP(s);
618 while (s < strend && *s == ch)
619 s += UTF8SKIP(s);
620 }
621 s += UTF8SKIP(s);
622 }
623 }
624 else {
625 while (s < strend) {
626 if (*s == ch) {
627 if (regtry(prog, s)) goto got_it;
c277df42 628 s++;
a0ed51b3
LW		 629 while (s < strend && *s == ch)
630 s++;
631 }
632 s++;
a0d0e21e 633 }
a687059c 634 }
c277df42
IZ		 635 }
636 /*SUPPRESS 560*/
637 else if (prog->anchored_substr != Nullsv
638 || (prog->float_substr != Nullsv
639 && prog->float_max_offset < strend - s)) {
640 SV *must = prog->anchored_substr
641 ? prog->anchored_substr : prog->float_substr;
642 I32 back_max =
643 prog->anchored_substr ? prog->anchored_offset : prog->float_max_offset;
644 I32 back_min =
645 prog->anchored_substr ? prog->anchored_offset : prog->float_min_offset;
646 I32 delta = back_max - back_min;
cf93c79d 647 char *last = HOPc(strend, /* Cannot start after this */
73c4f7a1
GS		 648 -(I32)(CHR_SVLEN(must)
649 - (SvTAIL(must) != 0) + back_min));
a0ed51b3
LW		 650 char *last1; /* Last position checked before */
651
652 if (s > PL_bostr)
dfe13c55 653 last1 = HOPc(s, -1);
a0ed51b3
LW		 654 else
655 last1 = s - 1; /* bogus */
c277df42
IZ		 656
657 /* XXXX check_substr already used to find `s', can optimize if
658 check_substr==must. */
659 scream_pos = -1;
660 dontbother = end_shift;
dfe13c55 661 strend = HOPc(strend, -dontbother);
c277df42 662 while ( (s <= last) &&
22e551b9
IZ		 663 ((flags & REXEC_SCREAM)
664 ? (s = screaminstr(sv, must, HOPc(s, back_min) - strbeg,
c277df42 665 end_shift, &scream_pos, 0))
a0ed51b3 666 : (s = fbm_instr((unsigned char*)HOP(s, back_min),
cf93c79d
IZ		 667 (unsigned char*)strend, must,
668 PL_multiline ? FBMrf_MULTILINE : 0))) ) {
dfe13c55
GS		 669 if (HOPc(s, -back_max) > last1) {
670 last1 = HOPc(s, -back_min);
671 s = HOPc(s, -back_max);
a0ed51b3
LW		 672 }
673 else {
dfe13c55 674 char *t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1;
c277df42 675
dfe13c55 676 last1 = HOPc(s, -back_min);
c277df42 677 s = t;
a0d0e21e 678 }
a0ed51b3
LW		 679 if (UTF) {
680 while (s <= last1) {
681 if (regtry(prog, s))
682 goto got_it;
683 s += UTF8SKIP(s);
684 }
685 }
686 else {
687 while (s <= last1) {
688 if (regtry(prog, s))
689 goto got_it;
690 s++;
691 }
a0d0e21e
LW		 692 }
693 }
694 goto phooey;
a0ed51b3
LW		 695 }
696 else if (c = prog->regstclass) {
a0d0e21e 697 I32 doevery = (prog->reganch & ROPT_SKIP) == 0;
a0ed51b3 698 char *cc;
a687059c 699
a0d0e21e
LW		 700 if (minlen)
701 dontbother = minlen - 1;
dfe13c55 702 strend = HOPc(strend, -dontbother); /* don't bother with what can't match */
a0d0e21e
LW		 703 tmp = 1;
704 /* We know what class it must start with. */
705 switch (OP(c)) {
a0ed51b3
LW		 706 case ANYOFUTF8:
707 cc = (char *) OPERAND(c);
708 while (s < strend) {
709 if (REGINCLASSUTF8(c, (U8*)s)) {
710 if (tmp && regtry(prog, s))
711 goto got_it;
712 else
713 tmp = doevery;
714 }
715 else
716 tmp = 1;
717 s += UTF8SKIP(s);
718 }
719 break;
a0d0e21e 720 case ANYOF:
a0ed51b3 721 cc = (char *) OPERAND(c);
a0d0e21e 722 while (s < strend) {
a0ed51b3 723 if (REGINCLASS(cc, *s)) {
a0d0e21e
LW		 724 if (tmp && regtry(prog, s))
725 goto got_it;
726 else
727 tmp = doevery;
a687059c 728 }
a0d0e21e
LW		 729 else
730 tmp = 1;
731 s++;
732 }
733 break;
bbce6d69 734 case BOUNDL:
3280af22 735 PL_reg_flags |= RF_tainted;
bbce6d69 736 /* FALL THROUGH */
a0d0e21e 737 case BOUND:
a0ed51b3
LW		 738 if (minlen) {
739 dontbother++;
740 strend -= 1;
741 }
3280af22 742 tmp = (s != startpos) ? UCHARAT(s - 1) : PL_regprev;
95bac841 743 tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
a0d0e21e 744 while (s < strend) {
95bac841 745 if (tmp == !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) {
a0d0e21e
LW		 746 tmp = !tmp;
747 if (regtry(prog, s))
748 goto got_it;
a687059c 749 }
a0d0e21e
LW		 750 s++;
751 }
752 if ((minlen || tmp) && regtry(prog,s))
753 goto got_it;
754 break;
a0ed51b3
LW		 755 case BOUNDLUTF8:
756 PL_reg_flags |= RF_tainted;
757 /* FALL THROUGH */
758 case BOUNDUTF8:
759 if (minlen) {
760 dontbother++;
dfe13c55 761 strend = reghop_c(strend, -1);
a0ed51b3 762 }
dfe13c55 763 tmp = (I32)(s != startpos) ? utf8_to_uv(reghop((U8*)s, -1), 0) : PL_regprev;
a0ed51b3
LW		 764 tmp = ((OP(c) == BOUND ? isALNUM_uni(tmp) : isALNUM_LC_uni(tmp)) != 0);
765 while (s < strend) {
dfe13c55
GS		 766 if (tmp == !(OP(c) == BOUND ?
767 swash_fetch(PL_utf8_alnum, (U8*)s) :
768 isALNUM_LC_utf8((U8*)s)))
769 {
a0ed51b3
LW		 770 tmp = !tmp;
771 if (regtry(prog, s))
772 goto got_it;
773 }
774 s += UTF8SKIP(s);
775 }
776 if ((minlen || tmp) && regtry(prog,s))
777 goto got_it;
778 break;
bbce6d69 779 case NBOUNDL:
3280af22 780 PL_reg_flags |= RF_tainted;
bbce6d69 781 /* FALL THROUGH */
a0d0e21e 782 case NBOUND:
a0ed51b3
LW		 783 if (minlen) {
784 dontbother++;
785 strend -= 1;
786 }
3280af22 787 tmp = (s != startpos) ? UCHARAT(s - 1) : PL_regprev;
95bac841 788 tmp = ((OP(c) == NBOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0);
a0d0e21e 789 while (s < strend) {
95bac841 790 if (tmp == !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s)))
a0d0e21e
LW		 791 tmp = !tmp;
792 else if (regtry(prog, s))
793 goto got_it;
794 s++;
795 }
796 if ((minlen || !tmp) && regtry(prog,s))
797 goto got_it;
798 break;
a0ed51b3
LW		 799 case NBOUNDLUTF8:
800 PL_reg_flags |= RF_tainted;
801 /* FALL THROUGH */
802 case NBOUNDUTF8:
803 if (minlen) {
804 dontbother++;
dfe13c55 805 strend = reghop_c(strend, -1);
a0ed51b3 806 }
dfe13c55 807 tmp = (I32)(s != startpos) ? utf8_to_uv(reghop((U8*)s, -1), 0) : PL_regprev;
a0ed51b3
LW		 808 tmp = ((OP(c) == NBOUND ? isALNUM_uni(tmp) : isALNUM_LC_uni(tmp)) != 0);
809 while (s < strend) {
dfe13c55
GS		 810 if (tmp == !(OP(c) == NBOUND ?
811 swash_fetch(PL_utf8_alnum, (U8*)s) :
812 isALNUM_LC_utf8((U8*)s)))
a0ed51b3
LW		 813 tmp = !tmp;
814 else if (regtry(prog, s))
815 goto got_it;
816 s += UTF8SKIP(s);
817 }
818 if ((minlen || !tmp) && regtry(prog,s))
819 goto got_it;
820 break;
a0d0e21e
LW		 821 case ALNUM:
822 while (s < strend) {
bbce6d69 823 if (isALNUM(*s)) {
824 if (tmp && regtry(prog, s))
825 goto got_it;
826 else
827 tmp = doevery;
828 }
829 else
830 tmp = 1;
831 s++;
832 }
833 break;
a0ed51b3
LW		 834 case ALNUMUTF8:
835 while (s < strend) {
dfe13c55 836 if (swash_fetch(PL_utf8_alnum, (U8*)s)) {
a0ed51b3
LW		 837 if (tmp && regtry(prog, s))
838 goto got_it;
839 else
840 tmp = doevery;
841 }
842 else
843 tmp = 1;
844 s += UTF8SKIP(s);
845 }
846 break;
bbce6d69 847 case ALNUML:
3280af22 848 PL_reg_flags |= RF_tainted;
bbce6d69 849 while (s < strend) {
850 if (isALNUM_LC(*s)) {
a0d0e21e
LW		 851 if (tmp && regtry(prog, s))
852 goto got_it;
a687059c 853 else
a0d0e21e
LW		 854 tmp = doevery;
855 }
856 else
857 tmp = 1;
858 s++;
859 }
860 break;
a0ed51b3
LW		 861 case ALNUMLUTF8:
862 PL_reg_flags |= RF_tainted;
863 while (s < strend) {
dfe13c55 864 if (isALNUM_LC_utf8((U8*)s)) {
a0ed51b3
LW		 865 if (tmp && regtry(prog, s))
866 goto got_it;
867 else
868 tmp = doevery;
869 }
870 else
871 tmp = 1;
872 s += UTF8SKIP(s);
873 }
874 break;
a0d0e21e
LW		 875 case NALNUM:
876 while (s < strend) {
bbce6d69 877 if (!isALNUM(*s)) {
878 if (tmp && regtry(prog, s))
879 goto got_it;
880 else
881 tmp = doevery;
882 }
883 else
884 tmp = 1;
885 s++;
886 }
887 break;
a0ed51b3
LW		 888 case NALNUMUTF8:
889 while (s < strend) {
dfe13c55 890 if (!swash_fetch(PL_utf8_alnum, (U8*)s)) {
a0ed51b3
LW		 891 if (tmp && regtry(prog, s))
892 goto got_it;
893 else
894 tmp = doevery;
895 }
896 else
897 tmp = 1;
898 s += UTF8SKIP(s);
899 }
900 break;
bbce6d69 901 case NALNUML:
3280af22 902 PL_reg_flags |= RF_tainted;
bbce6d69 903 while (s < strend) {
904 if (!isALNUM_LC(*s)) {
a0d0e21e
LW		 905 if (tmp && regtry(prog, s))
906 goto got_it;
a687059c 907 else
a0d0e21e 908 tmp = doevery;
a687059c 909 }
a0d0e21e
LW		 910 else
911 tmp = 1;
912 s++;
913 }
914 break;
a0ed51b3
LW		 915 case NALNUMLUTF8:
916 PL_reg_flags |= RF_tainted;
917 while (s < strend) {
dfe13c55 918 if (!isALNUM_LC_utf8((U8*)s)) {
a0ed51b3
LW		 919 if (tmp && regtry(prog, s))
920 goto got_it;
921 else
922 tmp = doevery;
923 }
924 else
925 tmp = 1;
926 s += UTF8SKIP(s);
927 }
928 break;
a0d0e21e
LW		 929 case SPACE:
930 while (s < strend) {
931 if (isSPACE(*s)) {
932 if (tmp && regtry(prog, s))
933 goto got_it;
934 else
935 tmp = doevery;
2304df62 936 }
a0d0e21e
LW		 937 else
938 tmp = 1;
939 s++;
940 }
941 break;
a0ed51b3
LW		 942 case SPACEUTF8:
943 while (s < strend) {
dfe13c55 944 if (*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s)) {
a0ed51b3
LW		 945 if (tmp && regtry(prog, s))
946 goto got_it;
947 else
948 tmp = doevery;
949 }
950 else
951 tmp = 1;
952 s += UTF8SKIP(s);
953 }
954 break;
bbce6d69 955 case SPACEL:
3280af22 956 PL_reg_flags |= RF_tainted;
bbce6d69 957 while (s < strend) {
958 if (isSPACE_LC(*s)) {
959 if (tmp && regtry(prog, s))
960 goto got_it;
961 else
962 tmp = doevery;
963 }
964 else
965 tmp = 1;
966 s++;
967 }
968 break;
a0ed51b3
LW		 969 case SPACELUTF8:
970 PL_reg_flags |= RF_tainted;
971 while (s < strend) {
dfe13c55 972 if (*s == ' ' || isSPACE_LC_utf8((U8*)s)) {
a0ed51b3
LW		 973 if (tmp && regtry(prog, s))
974 goto got_it;
975 else
976 tmp = doevery;
977 }
978 else
979 tmp = 1;
980 s += UTF8SKIP(s);
981 }
982 break;
a0d0e21e
LW		 983 case NSPACE:
984 while (s < strend) {
985 if (!isSPACE(*s)) {
986 if (tmp && regtry(prog, s))
987 goto got_it;
988 else
989 tmp = doevery;
a687059c 990 }
a0d0e21e
LW		 991 else
992 tmp = 1;
993 s++;
994 }
995 break;
a0ed51b3
LW		 996 case NSPACEUTF8:
997 while (s < strend) {
dfe13c55 998 if (!(*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s))) {
a0ed51b3
LW		 999 if (tmp && regtry(prog, s))
1000 goto got_it;
1001 else
1002 tmp = doevery;
1003 }
1004 else
1005 tmp = 1;
1006 s += UTF8SKIP(s);
1007 }
1008 break;
bbce6d69 1009 case NSPACEL:
3280af22 1010 PL_reg_flags |= RF_tainted;
bbce6d69 1011 while (s < strend) {
1012 if (!isSPACE_LC(*s)) {
1013 if (tmp && regtry(prog, s))
1014 goto got_it;
1015 else
1016 tmp = doevery;
1017 }
1018 else
1019 tmp = 1;
1020 s++;
1021 }
1022 break;
a0ed51b3
LW		 1023 case NSPACELUTF8:
1024 PL_reg_flags |= RF_tainted;
1025 while (s < strend) {
dfe13c55 1026 if (!(*s == ' ' || isSPACE_LC_utf8((U8*)s))) {
a0ed51b3
LW		 1027 if (tmp && regtry(prog, s))
1028 goto got_it;
1029 else
1030 tmp = doevery;
1031 }
1032 else
1033 tmp = 1;
1034 s += UTF8SKIP(s);
1035 }
1036 break;
a0d0e21e
LW		 1037 case DIGIT:
1038 while (s < strend) {
1039 if (isDIGIT(*s)) {
1040 if (tmp && regtry(prog, s))
1041 goto got_it;
1042 else
1043 tmp = doevery;
2b69d0c2 1044 }
a0d0e21e
LW		 1045 else
1046 tmp = 1;
1047 s++;
1048 }
1049 break;
a0ed51b3
LW		 1050 case DIGITUTF8:
1051 while (s < strend) {
dfe13c55 1052 if (swash_fetch(PL_utf8_digit,(U8*)s)) {
a0ed51b3
LW		 1053 if (tmp && regtry(prog, s))
1054 goto got_it;
1055 else
1056 tmp = doevery;
1057 }
1058 else
1059 tmp = 1;
1060 s += UTF8SKIP(s);
1061 }
1062 break;
b8c5462f
JH		 1063 case DIGITL:
1064 PL_reg_flags |= RF_tainted;
1065 while (s < strend) {
1066 if (isDIGIT_LC(*s)) {
1067 if (tmp && regtry(prog, s))
1068 goto got_it;
1069 else
1070 tmp = doevery;
1071 }
1072 else
1073 tmp = 1;
1074 s++;
1075 }
1076 break;
1077 case DIGITLUTF8:
1078 PL_reg_flags |= RF_tainted;
1079 while (s < strend) {
1080 if (isDIGIT_LC_utf8((U8*)s)) {
1081 if (tmp && regtry(prog, s))
1082 goto got_it;
1083 else
1084 tmp = doevery;
1085 }
1086 else
1087 tmp = 1;
1088 s += UTF8SKIP(s);
1089 }
1090 break;
a0d0e21e
LW		 1091 case NDIGIT:
1092 while (s < strend) {
1093 if (!isDIGIT(*s)) {
1094 if (tmp && regtry(prog, s))
1095 goto got_it;
1096 else
1097 tmp = doevery;
a687059c 1098 }
a0d0e21e
LW		 1099 else
1100 tmp = 1;
1101 s++;
1102 }
1103 break;
a0ed51b3
LW		 1104 case NDIGITUTF8:
1105 while (s < strend) {
dfe13c55 1106 if (!swash_fetch(PL_utf8_digit,(U8*)s)) {
a0ed51b3
LW		 1107 if (tmp && regtry(prog, s))
1108 goto got_it;
1109 else
1110 tmp = doevery;
1111 }
1112 else
1113 tmp = 1;
1114 s += UTF8SKIP(s);
1115 }
1116 break;
b8c5462f
JH		 1117 case NDIGITL:
1118 PL_reg_flags |= RF_tainted;
1119 while (s < strend) {
1120 if (!isDIGIT_LC(*s)) {
1121 if (tmp && regtry(prog, s))
1122 goto got_it;
1123 else
1124 tmp = doevery;
1125 }
1126 else
1127 tmp = 1;
1128 s++;
a0ed51b3 1129 }
b8c5462f
JH		 1130 break;
1131 case NDIGITLUTF8:
1132 PL_reg_flags |= RF_tainted;
1133 while (s < strend) {
1134 if (!isDIGIT_LC_utf8((U8*)s)) {
1135 if (tmp && regtry(prog, s))
1136 goto got_it;
cf93c79d 1137 else
b8c5462f
JH		 1138 tmp = doevery;
1139 }
1140 else
1141 tmp = 1;
1142 s += UTF8SKIP(s);
1143 }
1144 break;
1145 case ALNUMC:
1146 while (s < strend) {
1147 if (isALNUMC(*s)) {
1148 if (tmp && regtry(prog, s))
1149 goto got_it;
cf93c79d 1150 else
b8c5462f 1151 tmp = doevery;
cf93c79d 1152 }
b8c5462f
JH		 1153 else
1154 tmp = 1;
1155 s++;
c277df42 1156 }
b8c5462f
JH		 1157 break;
1158 case ALNUMCUTF8:
1159 while (s < strend) {
1160 if (swash_fetch(PL_utf8_alnumc, (U8*)s)) {
1161 if (tmp && regtry(prog, s))
1162 goto got_it;
1163 else
1164 tmp = doevery;
1165 }
1166 else
1167 tmp = 1;
a0ed51b3 1168 s += UTF8SKIP(s);
9661b544 1169 }
b8c5462f
JH		 1170 break;
1171 case ALNUMCL:
1172 PL_reg_flags |= RF_tainted;
1173 while (s < strend) {
1174 if (isALNUMC_LC(*s)) {
1175 if (tmp && regtry(prog, s))
1176 goto got_it;
1177 else
1178 tmp = doevery;
1179 }
1180 else
1181 tmp = 1;
1182 s++;
9661b544 1183 }
b8c5462f
JH		 1184 break;
1185 case ALNUMCLUTF8:
1186 PL_reg_flags |= RF_tainted;
1187 while (s < strend) {
1188 if (isALNUMC_LC_utf8((U8*)s)) {
1189 if (tmp && regtry(prog, s))
1190 goto got_it;
1191 else
1192 tmp = doevery;
1193 }
1194 else
1195 tmp = 1;
1196 s += UTF8SKIP(s);
1197 }
1198 break;
1199 case NALNUMC:
1200 while (s < strend) {
1201 if (!isALNUMC(*s)) {
1202 if (tmp && regtry(prog, s))
1203 goto got_it;
1204 else
1205 tmp = doevery;
1206 }
1207 else
1208 tmp = 1;
1209 s++;
1210 }
1211 break;
1212 case NALNUMCUTF8:
1213 while (s < strend) {
1214 if (!swash_fetch(PL_utf8_alnumc, (U8*)s)) {
1215 if (tmp && regtry(prog, s))
1216 goto got_it;
1217 else
1218 tmp = doevery;
1219 }
1220 else
1221 tmp = 1;
1222 s += UTF8SKIP(s);
1223 }
1224 break;
1225 case NALNUMCL:
1226 PL_reg_flags |= RF_tainted;
1227 while (s < strend) {
1228 if (!isALNUMC_LC(*s)) {
1229 if (tmp && regtry(prog, s))
1230 goto got_it;
1231 else
1232 tmp = doevery;
1233 }
1234 else
1235 tmp = 1;
1236 s++;
1237 }
1238 break;
1239 case NALNUMCLUTF8:
1240 PL_reg_flags |= RF_tainted;
1241 while (s < strend) {
1242 if (!isALNUMC_LC_utf8((U8*)s)) {
1243 if (tmp && regtry(prog, s))
1244 goto got_it;
1245 else
1246 tmp = doevery;
1247 }
1248 else
1249 tmp = 1;
1250 s += UTF8SKIP(s);
1251 }
1252 break;
1253 case ASCII:
1254 while (s < strend) {
f248d071 1255 if (isASCII(*(U8*)s)) {
b8c5462f
JH		 1256 if (tmp && regtry(prog, s))
1257 goto got_it;
1258 else
1259 tmp = doevery;
1260 }
1261 else
1262 tmp = 1;
1263 s++;
1264 }
1265 break;
1266 case NASCII:
1267 while (s < strend) {
f248d071 1268 if (!isASCII(*(U8*)s)) {
b8c5462f
JH		 1269 if (tmp && regtry(prog, s))
1270 goto got_it;
1271 else
1272 tmp = doevery;
1273 }
1274 else
1275 tmp = 1;
1276 s++;
1277 }
1278 break;
1279 case CNTRL:
1280 while (s < strend) {
1281 if (isCNTRL(*s)) {
1282 if (tmp && regtry(prog, s))
1283 goto got_it;
1284 else
1285 tmp = doevery;
1286 }
1287 else
1288 tmp = 1;
1289 s++;
1290 }
1291 break;
1292 case CNTRLUTF8:
1293 while (s < strend) {
1294 if (swash_fetch(PL_utf8_cntrl,(U8*)s)) {
1295 if (tmp && regtry(prog, s))
1296 goto got_it;
1297 else
1298 tmp = doevery;
1299 }
1300 else
1301 tmp = 1;
1302 s += UTF8SKIP(s);
1303 }
1304 break;
1305 case CNTRLL:
1306 PL_reg_flags |= RF_tainted;
1307 while (s < strend) {
1308 if (isCNTRL_LC(*s)) {
1309 if (tmp && regtry(prog, s))
1310 goto got_it;
1311 else
1312 tmp = doevery;
1313 }
1314 else
1315 tmp = 1;
1316 s++;
1317 }
1318 break;
1319 case CNTRLLUTF8:
1320 PL_reg_flags |= RF_tainted;
1321 while (s < strend) {
1322 if (*s == ' ' || isCNTRL_LC_utf8((U8*)s)) {
1323 if (tmp && regtry(prog, s))
1324 goto got_it;
1325 else
1326 tmp = doevery;
1327 }
1328 else
1329 tmp = 1;
1330 s += UTF8SKIP(s);
1331 }
1332 break;
1333 case NCNTRL:
1334 while (s < strend) {
1335 if (!isCNTRL(*s)) {
1336 if (tmp && regtry(prog, s))
1337 goto got_it;
1338 else
1339 tmp = doevery;
1340 }
1341 else
1342 tmp = 1;
1343 s++;
1344 }
1345 break;
1346 case NCNTRLUTF8:
1347 while (s < strend) {
1348 if (!swash_fetch(PL_utf8_cntrl,(U8*)s)) {
1349 if (tmp && regtry(prog, s))
1350 goto got_it;
1351 else
1352 tmp = doevery;
1353 }
1354 else
1355 tmp = 1;
1356 s += UTF8SKIP(s);
1357 }
1358 break;
1359 case NCNTRLL:
1360 PL_reg_flags |= RF_tainted;
1361 while (s < strend) {
1362 if (!isCNTRL_LC(*s)) {
1363 if (tmp && regtry(prog, s))
1364 goto got_it;
1365 else
1366 tmp = doevery;
1367 }
1368 else
1369 tmp = 1;
1370 s++;
1371 }
1372 break;
1373 case NCNTRLLUTF8:
1374 PL_reg_flags |= RF_tainted;
1375 while (s < strend) {
1376 if (!isCNTRL_LC_utf8((U8*)s)) {
1377 if (tmp && regtry(prog, s))
1378 goto got_it;
1379 else
1380 tmp = doevery;
1381 }
1382 else
1383 tmp = 1;
1384 s += UTF8SKIP(s);
1385 }
1386 break;
1387 case GRAPH:
1388 while (s < strend) {
1389 if (isGRAPH(*s)) {
1390 if (tmp && regtry(prog, s))
1391 goto got_it;
1392 else
1393 tmp = doevery;
1394 }
1395 else
1396 tmp = 1;
1397 s++;
1398 }
1399 break;
1400 case GRAPHUTF8:
1401 while (s < strend) {
1402 if (swash_fetch(PL_utf8_graph,(U8*)s)) {
1403 if (tmp && regtry(prog, s))
1404 goto got_it;
1405 else
1406 tmp = doevery;
1407 }
1408 else
1409 tmp = 1;
1410 s += UTF8SKIP(s);
1411 }
1412 break;
1413 case GRAPHL:
1414 PL_reg_flags |= RF_tainted;
1415 while (s < strend) {
1416 if (isGRAPH_LC(*s)) {
1417 if (tmp && regtry(prog, s))
1418 goto got_it;
1419 else
1420 tmp = doevery;
1421 }
1422 else
1423 tmp = 1;
1424 s++;
1425 }
1426 break;
1427 case GRAPHLUTF8:
1428 PL_reg_flags |= RF_tainted;
1429 while (s < strend) {
1430 if (*s == ' ' || isGRAPH_LC_utf8((U8*)s)) {
1431 if (tmp && regtry(prog, s))
1432 goto got_it;
1433 else
1434 tmp = doevery;
1435 }
1436 else
1437 tmp = 1;
1438 s += UTF8SKIP(s);
1439 }
1440 break;
1441 case NGRAPH:
1442 while (s < strend) {
1443 if (!isGRAPH(*s)) {
1444 if (tmp && regtry(prog, s))
1445 goto got_it;
1446 else
1447 tmp = doevery;
1448 }
1449 else
1450 tmp = 1;
1451 s++;
1452 }
1453 break;
1454 case NGRAPHUTF8:
1455 while (s < strend) {
1456 if (!swash_fetch(PL_utf8_graph,(U8*)s)) {
1457 if (tmp && regtry(prog, s))
1458 goto got_it;
1459 else
1460 tmp = doevery;
1461 }
1462 else
1463 tmp = 1;
1464 s += UTF8SKIP(s);
1465 }
1466 break;
1467 case NGRAPHL:
1468 PL_reg_flags |= RF_tainted;
1469 while (s < strend) {
1470 if (!isGRAPH_LC(*s)) {
1471 if (tmp && regtry(prog, s))
1472 goto got_it;
1473 else
1474 tmp = doevery;
1475 }
1476 else
1477 tmp = 1;
1478 s++;
1479 }
1480 break;
1481 case NGRAPHLUTF8:
1482 PL_reg_flags |= RF_tainted;
1483 while (s < strend) {
1484 if (!isGRAPH_LC_utf8((U8*)s)) {
1485 if (tmp && regtry(prog, s))
1486 goto got_it;
1487 else
1488 tmp = doevery;
1489 }
1490 else
1491 tmp = 1;
1492 s += UTF8SKIP(s);
1493 }
1494 break;
1495 case LOWER:
1496 while (s < strend) {
1497 if (isLOWER(*s)) {
1498 if (tmp && regtry(prog, s))
1499 goto got_it;
1500 else
1501 tmp = doevery;
1502 }
1503 else
1504 tmp = 1;
1505 s++;
1506 }
1507 break;
1508 case LOWERUTF8:
1509 while (s < strend) {
1510 if (swash_fetch(PL_utf8_lower,(U8*)s)) {
1511 if (tmp && regtry(prog, s))
1512 goto got_it;
1513 else
1514 tmp = doevery;
1515 }
1516 else
1517 tmp = 1;
1518 s += UTF8SKIP(s);
1519 }
1520 break;
1521 case LOWERL:
1522 PL_reg_flags |= RF_tainted;
1523 while (s < strend) {
1524 if (isLOWER_LC(*s)) {
1525 if (tmp && regtry(prog, s))
1526 goto got_it;
1527 else
1528 tmp = doevery;
1529 }
1530 else
1531 tmp = 1;
1532 s++;
1533 }
1534 break;
1535 case LOWERLUTF8:
1536 PL_reg_flags |= RF_tainted;
1537 while (s < strend) {
1538 if (*s == ' ' || isLOWER_LC_utf8((U8*)s)) {
1539 if (tmp && regtry(prog, s))
1540 goto got_it;
1541 else
1542 tmp = doevery;
1543 }
1544 else
1545 tmp = 1;
1546 s += UTF8SKIP(s);
1547 }
1548 break;
1549 case NLOWER:
1550 while (s < strend) {
1551 if (!isLOWER(*s)) {
1552 if (tmp && regtry(prog, s))
1553 goto got_it;
1554 else
1555 tmp = doevery;
1556 }
1557 else
1558 tmp = 1;
1559 s++;
1560 }
1561 break;
1562 case NLOWERUTF8:
1563 while (s < strend) {
1564 if (!swash_fetch(PL_utf8_lower,(U8*)s)) {
1565 if (tmp && regtry(prog, s))
1566 goto got_it;
1567 else
1568 tmp = doevery;
1569 }
1570 else
1571 tmp = 1;
1572 s += UTF8SKIP(s);
1573 }
1574 break;
1575 case NLOWERL:
1576 PL_reg_flags |= RF_tainted;
1577 while (s < strend) {
1578 if (!isLOWER_LC(*s)) {
1579 if (tmp && regtry(prog, s))
1580 goto got_it;
1581 else
1582 tmp = doevery;
1583 }
1584 else
1585 tmp = 1;
1586 s++;
1587 }
1588 break;
1589 case NLOWERLUTF8:
1590 PL_reg_flags |= RF_tainted;
1591 while (s < strend) {
1592 if (!isLOWER_LC_utf8((U8*)s)) {
1593 if (tmp && regtry(prog, s))
1594 goto got_it;
1595 else
1596 tmp = doevery;
1597 }
1598 else
1599 tmp = 1;
1600 s += UTF8SKIP(s);
1601 }
1602 break;
1603 case PRINT:
1604 while (s < strend) {
1605 if (isPRINT(*s)) {
1606 if (tmp && regtry(prog, s))
1607 goto got_it;
1608 else
1609 tmp = doevery;
1610 }
1611 else
1612 tmp = 1;
1613 s++;
1614 }
1615 break;
1616 case PRINTUTF8:
1617 while (s < strend) {
1618 if (swash_fetch(PL_utf8_print,(U8*)s)) {
1619 if (tmp && regtry(prog, s))
1620 goto got_it;
1621 else
1622 tmp = doevery;
1623 }
1624 else
1625 tmp = 1;
1626 s += UTF8SKIP(s);
1627 }
1628 break;
1629 case PRINTL:
1630 PL_reg_flags |= RF_tainted;
1631 while (s < strend) {
1632 if (isPRINT_LC(*s)) {
1633 if (tmp && regtry(prog, s))
1634 goto got_it;
1635 else
1636 tmp = doevery;
1637 }
1638 else
1639 tmp = 1;
1640 s++;
1641 }
1642 break;
1643 case PRINTLUTF8:
1644 PL_reg_flags |= RF_tainted;
1645 while (s < strend) {
1646 if (*s == ' ' || isPRINT_LC_utf8((U8*)s)) {
1647 if (tmp && regtry(prog, s))
1648 goto got_it;
1649 else
1650 tmp = doevery;
1651 }
1652 else
1653 tmp = 1;
1654 s += UTF8SKIP(s);
1655 }
1656 break;
1657 case NPRINT:
1658 while (s < strend) {
1659 if (!isPRINT(*s)) {
1660 if (tmp && regtry(prog, s))
1661 goto got_it;
1662 else
1663 tmp = doevery;
1664 }
1665 else
1666 tmp = 1;
1667 s++;
1668 }
1669 break;
1670 case NPRINTUTF8:
1671 while (s < strend) {
1672 if (!swash_fetch(PL_utf8_print,(U8*)s)) {
1673 if (tmp && regtry(prog, s))
1674 goto got_it;
1675 else
1676 tmp = doevery;
1677 }
1678 else
1679 tmp = 1;
1680 s += UTF8SKIP(s);
1681 }
1682 break;
1683 case NPRINTL:
1684 PL_reg_flags |= RF_tainted;
1685 while (s < strend) {
1686 if (!isPRINT_LC(*s)) {
1687 if (tmp && regtry(prog, s))
1688 goto got_it;
1689 else
1690 tmp = doevery;
1691 }
1692 else
1693 tmp = 1;
1694 s++;
1695 }
1696 break;
1697 case NPRINTLUTF8:
1698 PL_reg_flags |= RF_tainted;
1699 while (s < strend) {
1700 if (!isPRINT_LC_utf8((U8*)s)) {
1701 if (tmp && regtry(prog, s))
1702 goto got_it;
1703 else
1704 tmp = doevery;
1705 }
1706 else
1707 tmp = 1;
1708 s += UTF8SKIP(s);
1709 }
1710 break;
1711 case PUNCT:
1712 while (s < strend) {
1713 if (isPUNCT(*s)) {
1714 if (tmp && regtry(prog, s))
1715 goto got_it;
1716 else
1717 tmp = doevery;
1718 }
1719 else
1720 tmp = 1;
1721 s++;
1722 }
1723 break;
1724 case PUNCTUTF8:
1725 while (s < strend) {
1726 if (swash_fetch(PL_utf8_punct,(U8*)s)) {
1727 if (tmp && regtry(prog, s))
1728 goto got_it;
1729 else
1730 tmp = doevery;
1731 }
1732 else
1733 tmp = 1;
1734 s += UTF8SKIP(s);
1735 }
1736 break;
1737 case PUNCTL:
1738 PL_reg_flags |= RF_tainted;
1739 while (s < strend) {
1740 if (isPUNCT_LC(*s)) {
1741 if (tmp && regtry(prog, s))
1742 goto got_it;
1743 else
1744 tmp = doevery;
1745 }
1746 else
1747 tmp = 1;
1748 s++;
1749 }
1750 break;
1751 case PUNCTLUTF8:
1752 PL_reg_flags |= RF_tainted;
1753 while (s < strend) {
1754 if (*s == ' ' || isPUNCT_LC_utf8((U8*)s)) {
1755 if (tmp && regtry(prog, s))
1756 goto got_it;
1757 else
1758 tmp = doevery;
1759 }
1760 else
1761 tmp = 1;
1762 s += UTF8SKIP(s);
1763 }
1764 break;
1765 case NPUNCT:
1766 while (s < strend) {
1767 if (!isPUNCT(*s)) {
1768 if (tmp && regtry(prog, s))
1769 goto got_it;
1770 else
1771 tmp = doevery;
1772 }
1773 else
1774 tmp = 1;
1775 s++;
1776 }
1777 break;
1778 case NPUNCTUTF8:
1779 while (s < strend) {
1780 if (!swash_fetch(PL_utf8_punct,(U8*)s)) {
1781 if (tmp && regtry(prog, s))
1782 goto got_it;
1783 else
1784 tmp = doevery;
1785 }
1786 else
1787 tmp = 1;
1788 s += UTF8SKIP(s);
1789 }
1790 break;
1791 case NPUNCTL:
1792 PL_reg_flags |= RF_tainted;
1793 while (s < strend) {
1794 if (!isPUNCT_LC(*s)) {
1795 if (tmp && regtry(prog, s))
1796 goto got_it;
1797 else
1798 tmp = doevery;
1799 }
1800 else
1801 tmp = 1;
1802 s++;
1803 }
1804 break;
1805 case NPUNCTLUTF8:
1806 PL_reg_flags |= RF_tainted;
1807 while (s < strend) {
1808 if (!isPUNCT_LC_utf8((U8*)s)) {
1809 if (tmp && regtry(prog, s))
1810 goto got_it;
1811 else
1812 tmp = doevery;
1813 }
1814 else
1815 tmp = 1;
1816 s += UTF8SKIP(s);
1817 }
1818 break;
1819 case UPPER:
1820 while (s < strend) {
1821 if (isUPPER(*s)) {
1822 if (tmp && regtry(prog, s))
1823 goto got_it;
1824 else
1825 tmp = doevery;
1826 }
1827 else
1828 tmp = 1;
1829 s++;
1830 }
1831 break;
1832 case UPPERUTF8:
1833 while (s < strend) {
1834 if (swash_fetch(PL_utf8_upper,(U8*)s)) {
1835 if (tmp && regtry(prog, s))
1836 goto got_it;
1837 else
1838 tmp = doevery;
1839 }
1840 else
1841 tmp = 1;
1842 s += UTF8SKIP(s);
1843 }
1844 break;
1845 case UPPERL:
1846 PL_reg_flags |= RF_tainted;
1847 while (s < strend) {
1848 if (isUPPER_LC(*s)) {
1849 if (tmp && regtry(prog, s))
1850 goto got_it;
1851 else
1852 tmp = doevery;
1853 }
1854 else
1855 tmp = 1;
1856 s++;
1857 }
1858 break;
1859 case UPPERLUTF8:
1860 PL_reg_flags |= RF_tainted;
1861 while (s < strend) {
1862 if (*s == ' ' || isUPPER_LC_utf8((U8*)s)) {
1863 if (tmp && regtry(prog, s))
1864 goto got_it;
1865 else
1866 tmp = doevery;
1867 }
1868 else
1869 tmp = 1;
1870 s += UTF8SKIP(s);
1871 }
1872 break;
1873 case NUPPER:
1874 while (s < strend) {
1875 if (!isUPPER(*s)) {
1876 if (tmp && regtry(prog, s))
1877 goto got_it;
1878 else
1879 tmp = doevery;
1880 }
1881 else
1882 tmp = 1;
1883 s++;
1884 }
1885 break;
1886 case NUPPERUTF8:
1887 while (s < strend) {
1888 if (!swash_fetch(PL_utf8_upper,(U8*)s)) {
1889 if (tmp && regtry(prog, s))
1890 goto got_it;
1891 else
1892 tmp = doevery;
1893 }
1894 else
1895 tmp = 1;
1896 s += UTF8SKIP(s);
1897 }
1898 break;
1899 case NUPPERL:
1900 PL_reg_flags |= RF_tainted;
1901 while (s < strend) {
1902 if (!isUPPER_LC(*s)) {
1903 if (tmp && regtry(prog, s))
1904 goto got_it;
1905 else
1906 tmp = doevery;
1907 }
1908 else
1909 tmp = 1;
1910 s++;
1911 }
1912 break;
1913 case NUPPERLUTF8:
1914 PL_reg_flags |= RF_tainted;
1915 while (s < strend) {
1916 if (!isUPPER_LC_utf8((U8*)s)) {
1917 if (tmp && regtry(prog, s))
1918 goto got_it;
1919 else
1920 tmp = doevery;
1921 }
1922 else
1923 tmp = 1;
1924 s += UTF8SKIP(s);
1925 }
1926 break;
1927 case XDIGIT:
1928 while (s < strend) {
1929 if (isXDIGIT(*s)) {
1930 if (tmp && regtry(prog, s))
1931 goto got_it;
1932 else
1933 tmp = doevery;
1934 }
1935 else
1936 tmp = 1;
1937 s++;
1938 }
1939 break;
1940 case NXDIGIT:
1941 while (s < strend) {
1942 if (!isXDIGIT(*s)) {
1943 if (tmp && regtry(prog, s))
1944 goto got_it;
1945 else
1946 tmp = doevery;
1947 }
1948 else
1949 tmp = 1;
1950 s++;
1951 }
1952 break;
1953 }
1954 }
1955 else {
1956 dontbother = 0;
1957 if (prog->float_substr != Nullsv) { /* Trim the end. */
1958 char *last;
1959 I32 oldpos = scream_pos;
1960
1961 if (flags & REXEC_SCREAM) {
1962 last = screaminstr(sv, prog->float_substr, s - strbeg,
1963 end_shift, &scream_pos, 1); /* last one */
1964 if (!last)
1965 last = scream_olds; /* Only one occurence. */
1966 }
1967 else {
1968 STRLEN len;
1969 char *little = SvPV(prog->float_substr, len);
1970
1971 if (SvTAIL(prog->float_substr)) {
1972 if (memEQ(strend - len + 1, little, len - 1))
1973 last = strend - len + 1;
1974 else if (!PL_multiline)
1975 last = memEQ(strend - len, little, len)
1976 ? strend - len : Nullch;
1977 else
1978 goto find_last;
1979 } else {
1980 find_last:
1981 if (len)
1982 last = rninstr(s, strend, little, little + len);
1983 else
1984 last = strend; /* matching `$' */
1985 }
1986 }
1987 if (last == NULL) goto phooey; /* Should not happen! */
1988 dontbother = strend - last + prog->float_min_offset;
1989 }
1990 if (minlen && (dontbother < minlen))
1991 dontbother = minlen - 1;
1992 strend -= dontbother; /* this one's always in bytes! */
1993 /* We don't know much -- general case. */
1994 if (UTF) {
1995 for (;;) {
1996 if (regtry(prog, s))
1997 goto got_it;
1998 if (s >= strend)
1999 break;
2000 s += UTF8SKIP(s);
2001 };
2002 }
2003 else {
2004 do {
2005 if (regtry(prog, s))
2006 goto got_it;
2007 } while (s++ < strend);
2008 }
2009 }
2010
2011 /* Failure. */
2012 goto phooey;
2013
2014got_it:
2015 RX_MATCH_TAINTED_set(prog, PL_reg_flags & RF_tainted);
2016
2017 if (PL_reg_eval_set) {
2018 /* Preserve the current value of $^R */
2019 if (oreplsv != GvSV(PL_replgv))
2020 sv_setsv(oreplsv, GvSV(PL_replgv));/* So that when GvSV(replgv) is
2021 restored, the value remains
2022 the same. */
51371543 2023 restore_pos(aTHXo_ 0);
b8c5462f
JH		 2024 }
2025
2026 /* make sure $`, $&, $', and $digit will work later */
2027 if ( !(flags & REXEC_NOT_FIRST) ) {
2028 if (RX_MATCH_COPIED(prog)) {
2029 Safefree(prog->subbeg);
2030 RX_MATCH_COPIED_off(prog);
2031 }
2032 if (flags & REXEC_COPY_STR) {
2033 I32 i = PL_regeol - startpos + (stringarg - strbeg);
2034
2035 s = savepvn(strbeg, i);
2036 prog->subbeg = s;
2037 prog->sublen = i;
2038 RX_MATCH_COPIED_on(prog);
2039 }
2040 else {
2041 prog->subbeg = strbeg;
2042 prog->sublen = PL_regeol - strbeg; /* strend may have been modified */
2043 }
2044 }
2045
2046 return 1;
2047
2048phooey:
2049 if (PL_reg_eval_set)
51371543 2050 restore_pos(aTHXo_ 0);
b8c5462f
JH		 2051 return 0;
2052}
2053
2054/*
2055 - regtry - try match at specific point
2056 */
2057STATIC I32 /* 0 failure, 1 success */
2058S_regtry(pTHX_ regexp *prog, char *startpos)
2059{
2060 dTHR;
2061 register I32 i;
2062 register I32 *sp;
2063 register I32 *ep;
2064 CHECKPOINT lastcp;
2065
2066 if ((prog->reganch & ROPT_EVAL_SEEN) && !PL_reg_eval_set) {
2067 MAGIC *mg;
2068
2069 PL_reg_eval_set = RS_init;
2070 DEBUG_r(DEBUG_s(
2071 PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %i\n",
2072 PL_stack_sp - PL_stack_base);
2073 ));
2074 SAVEINT(cxstack[cxstack_ix].blk_oldsp);
2075 cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base;
2076 /* Otherwise OP_NEXTSTATE will free whatever on stack now. */
2077 SAVETMPS;
2078 /* Apparently this is not needed, judging by wantarray. */
2079 /* SAVEINT(cxstack[cxstack_ix].blk_gimme);
2080 cxstack[cxstack_ix].blk_gimme = G_SCALAR; */
2081
2082 if (PL_reg_sv) {
2083 /* Make $_ available to executed code. */
2084 if (PL_reg_sv != DEFSV) {
2085 /* SAVE_DEFSV does *not* suffice here for USE_THREADS */
2086 SAVESPTR(DEFSV);
2087 DEFSV = PL_reg_sv;
2088 }
2089
2090 if (!(SvTYPE(PL_reg_sv) >= SVt_PVMG && SvMAGIC(PL_reg_sv)
2091 && (mg = mg_find(PL_reg_sv, 'g')))) {
2092 /* prepare for quick setting of pos */
2093 sv_magic(PL_reg_sv, (SV*)0, 'g', Nullch, 0);
2094 mg = mg_find(PL_reg_sv, 'g');
2095 mg->mg_len = -1;
2096 }
2097 PL_reg_magic = mg;
2098 PL_reg_oldpos = mg->mg_len;
51371543 2099 SAVEDESTRUCTOR(restore_pos, 0);
b8c5462f
JH		 2100 }
2101 if (!PL_reg_curpm)
2102 New(22,PL_reg_curpm, 1, PMOP);
2103 PL_reg_curpm->op_pmregexp = prog;
2104 PL_reg_oldcurpm = PL_curpm;
2105 PL_curpm = PL_reg_curpm;
2106 if (RX_MATCH_COPIED(prog)) {
2107 /* Here is a serious problem: we cannot rewrite subbeg,
2108 since it may be needed if this match fails. Thus
2109 $` inside (?{}) could fail... */
2110 PL_reg_oldsaved = prog->subbeg;
2111 PL_reg_oldsavedlen = prog->sublen;
2112 RX_MATCH_COPIED_off(prog);
2113 }
2114 else
2115 PL_reg_oldsaved = Nullch;
2116 prog->subbeg = PL_bostr;
2117 prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */
2118 }
2119 prog->startp[0] = startpos - PL_bostr;
2120 PL_reginput = startpos;
2121 PL_regstartp = prog->startp;
2122 PL_regendp = prog->endp;
2123 PL_reglastparen = &prog->lastparen;
2124 prog->lastparen = 0;
2125 PL_regsize = 0;
2126 DEBUG_r(PL_reg_starttry = startpos);
2127 if (PL_reg_start_tmpl <= prog->nparens) {
2128 PL_reg_start_tmpl = prog->nparens*3/2 + 3;
2129 if(PL_reg_start_tmp)
2130 Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*);
2131 else
2132 New(22,PL_reg_start_tmp, PL_reg_start_tmpl, char*);
2133 }
2134
2135 /* XXXX What this code is doing here?!!! There should be no need
2136 to do this again and again, PL_reglastparen should take care of
2137 this! */
2138 sp = prog->startp;
2139 ep = prog->endp;
2140 if (prog->nparens) {
2141 for (i = prog->nparens; i >= 1; i--) {
2142 *++sp = -1;
2143 *++ep = -1;
a687059c 2144 }
a0d0e21e 2145 }
c277df42 2146 REGCP_SET;
7e5428c5 2147 if (regmatch(prog->program + 1)) {
cf93c79d 2148 prog->endp[0] = PL_reginput - PL_bostr;
a0d0e21e
LW		 2149 return 1;
2150 }
c277df42
IZ		 2151 REGCP_UNWIND;
2152 return 0;
a687059c
LW		 2153}
2154
2155/*
2156 - regmatch - main matching routine
2157 *
2158 * Conceptually the strategy is simple: check to see whether the current
2159 * node matches, call self recursively to see whether the rest matches,
2160 * and then act accordingly. In practice we make some effort to avoid
2161 * recursion, in particular by going through "ordinary" nodes (that don't
2162 * need to know whether the rest of the match failed) by a loop instead of
2163 * by recursion.
2164 */
2165/* [lwall] I've hoisted the register declarations to the outer block in order to
2166 * maybe save a little bit of pushing and popping on the stack. It also takes
2167 * advantage of machines that use a register save mask on subroutine entry.
2168 */
76e3520e 2169STATIC I32 /* 0 failure, 1 success */
cea2e8a9 2170S_regmatch(pTHX_ regnode *prog)
a687059c 2171{
c277df42
IZ		 2172 dTHR;
2173 register regnode *scan; /* Current node. */
2174 regnode *next; /* Next node. */
2175 regnode *inner; /* Next node in internal branch. */
c3464db5
DD		 2176 register I32 nextchr; /* renamed nextchr - nextchar colides with
2177 function of same name */
a0d0e21e
LW		 2178 register I32 n; /* no or next */
2179 register I32 ln; /* len or last */
2180 register char *s; /* operand or save */
3280af22 2181 register char *locinput = PL_reginput;
c277df42
IZ		 2182 register I32 c1, c2, paren; /* case fold search, parenth */
2183 int minmod = 0, sw = 0, logical = 0;
4633a7c4 2184#ifdef DEBUGGING
3280af22 2185 PL_regindent++;
4633a7c4 2186#endif
a0d0e21e 2187
a0ed51b3 2188 /* Note that nextchr is a byte even in UTF */
76e3520e 2189 nextchr = UCHARAT(locinput);
a0d0e21e
LW		 2190 scan = prog;
2191 while (scan != NULL) {
c277df42 2192#define sayNO_L (logical ? (logical = 0, sw = 0, goto cont) : sayNO)
a687059c 2193#ifdef DEBUGGING
c277df42
IZ		 2194# define sayYES goto yes
2195# define sayNO goto no
2196# define saySAME(x) if (x) goto yes; else goto no
2197# define REPORT_CODE_OFF 24
4633a7c4 2198#else
c277df42
IZ		 2199# define sayYES return 1
2200# define sayNO return 0
2201# define saySAME(x) return x
a687059c 2202#endif
c277df42
IZ		 2203 DEBUG_r( {
2204 SV *prop = sv_newmortal();
3280af22 2205 int docolor = *PL_colors[0];
c277df42 2206 int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */
3280af22 2207 int l = (PL_regeol - locinput > taill ? taill : PL_regeol - locinput);
beed8111
IZ		 2208 /* The part of the string before starttry has one color
2209 (pref0_len chars), between starttry and current
2210 position another one (pref_len - pref0_len chars),
2211 after the current position the third one.
2212 We assume that pref0_len <= pref_len, otherwise we
2213 decrease pref0_len. */
3280af22
NIS		 2214 int pref_len = (locinput - PL_bostr > (5 + taill) - l
2215 ? (5 + taill) - l : locinput - PL_bostr);
364723c2 2216 int pref0_len = pref_len - (locinput - PL_reg_starttry);
c277df42 2217
3280af22
NIS		 2218 if (l + pref_len < (5 + taill) && l < PL_regeol - locinput)
2219 l = ( PL_regeol - locinput > (5 + taill) - pref_len
2220 ? (5 + taill) - pref_len : PL_regeol - locinput);
8d300b32
GS		 2221 if (pref0_len < 0)
2222 pref0_len = 0;
beed8111
IZ		 2223 if (pref0_len > pref_len)
2224 pref0_len = pref_len;
c277df42
IZ		 2225 regprop(prop, scan);
2226 PerlIO_printf(Perl_debug_log,
8d300b32 2227 "%4i <%s%.*s%s%s%.*s%s%s%s%.*s%s>%*s|%3d:%*s%s\n",
3280af22 2228 locinput - PL_bostr,
8d300b32
GS		 2229 PL_colors[4], pref0_len,
2230 locinput - pref_len, PL_colors[5],
2231 PL_colors[2], pref_len - pref0_len,
2232 locinput - pref_len + pref0_len, PL_colors[3],
c277df42 2233 (docolor ? "" : "> <"),
3280af22 2234 PL_colors[0], l, locinput, PL_colors[1],
c277df42
IZ		 2235 15 - l - pref_len + 1,
2236 "",
3280af22 2237 scan - PL_regprogram, PL_regindent*2, "",
c277df42
IZ		 2238 SvPVX(prop));
2239 } );
a687059c 2240
c277df42 2241 next = scan + NEXT_OFF(scan);
a0d0e21e
LW		 2242 if (next == scan)
2243 next = NULL;
a687059c 2244
a0d0e21e
LW		 2245 switch (OP(scan)) {
2246 case BOL:
3280af22
NIS		 2247 if (locinput == PL_bostr
2248 ? PL_regprev == '\n'
2249 : (PL_multiline &&
2250 (nextchr || locinput < PL_regeol) && locinput[-1] == '\n') )
a0d0e21e 2251 {
a0ed51b3 2252 /* regtill = regbol; */
a0d0e21e
LW		 2253 break;
2254 }
b8c5462f
JH		 2255 sayNO;
2256 case MBOL:
2257 if (locinput == PL_bostr
2258 ? PL_regprev == '\n'
2259 : ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n') )
2260 {
2261 break;
2262 }
2263 sayNO;
2264 case SBOL:
2265 if (locinput == PL_regbol && PL_regprev == '\n')
2266 break;
2267 sayNO;
2268 case GPOS:
2269 if (locinput == PL_reg_ganch)
2270 break;
2271 sayNO;
2272 case EOL:
2273 if (PL_multiline)
2274 goto meol;
2275 else
2276 goto seol;
2277 case MEOL:
2278 meol:
2279 if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
2280 sayNO;
2281 break;
2282 case SEOL:
2283 seol:
2284 if ((nextchr || locinput < PL_regeol) && nextchr != '\n')
2285 sayNO;
2286 if (PL_regeol - locinput > 1)
2287 sayNO;
2288 break;
2289 case EOS:
2290 if (PL_regeol != locinput)
2291 sayNO;
2292 break;
2293 case SANYUTF8:
2294 if (nextchr & 0x80) {
2295 locinput += PL_utf8skip[nextchr];
2296 if (locinput > PL_regeol)
2297 sayNO;
2298 nextchr = UCHARAT(locinput);
2299 break;
2300 }
2301 if (!nextchr && locinput >= PL_regeol)
2302 sayNO;
2303 nextchr = UCHARAT(++locinput);
2304 break;
2305 case SANY:
2306 if (!nextchr && locinput >= PL_regeol)
2307 sayNO;
2308 nextchr = UCHARAT(++locinput);
2309 break;
2310 case ANYUTF8:
2311 if (nextchr & 0x80) {
2312 locinput += PL_utf8skip[nextchr];
2313 if (locinput > PL_regeol)
2314 sayNO;
2315 nextchr = UCHARAT(locinput);
2316 break;
2317 }
2318 if (!nextchr && locinput >= PL_regeol || nextchr == '\n')
2319 sayNO;
2320 nextchr = UCHARAT(++locinput);
2321 break;
2322 case REG_ANY:
2323 if (!nextchr && locinput >= PL_regeol || nextchr == '\n')
2324 sayNO;
2325 nextchr = UCHARAT(++locinput);
2326 break;
2327 case EXACT:
2328 s = (char *) OPERAND(scan);
2329 ln = UCHARAT(s++);
2330 /* Inline the first character, for speed. */
2331 if (UCHARAT(s) != nextchr)
2332 sayNO;
2333 if (PL_regeol - locinput < ln)
2334 sayNO;
2335 if (ln > 1 && memNE(s, locinput, ln))
2336 sayNO;
2337 locinput += ln;
2338 nextchr = UCHARAT(locinput);
2339 break;
2340 case EXACTFL:
2341 PL_reg_flags |= RF_tainted;
2342 /* FALL THROUGH */
2343 case EXACTF:
2344 s = (char *) OPERAND(scan);
2345 ln = UCHARAT(s++);
2346
2347 if (UTF) {
2348 char *l = locinput;
2349 char *e = s + ln;
2350 c1 = OP(scan) == EXACTF;
2351 while (s < e) {
2352 if (l >= PL_regeol)
2353 sayNO;
2354 if (utf8_to_uv((U8*)s, 0) != (c1 ?
2355 toLOWER_utf8((U8*)l) :
2356 toLOWER_LC_utf8((U8*)l)))
2357 {
2358 sayNO;
2359 }
2360 s += UTF8SKIP(s);
2361 l += UTF8SKIP(l);
2362 }
2363 locinput = l;
2364 nextchr = UCHARAT(locinput);
2365 break;
2366 }
2367
2368 /* Inline the first character, for speed. */
2369 if (UCHARAT(s) != nextchr &&
2370 UCHARAT(s) != ((OP(scan) == EXACTF)
2371 ? PL_fold : PL_fold_locale)[nextchr])
2372 sayNO;
2373 if (PL_regeol - locinput < ln)
2374 sayNO;
2375 if (ln > 1 && (OP(scan) == EXACTF
2376 ? ibcmp(s, locinput, ln)
2377 : ibcmp_locale(s, locinput, ln)))
2378 sayNO;
2379 locinput += ln;
2380 nextchr = UCHARAT(locinput);
2381 break;
2382 case ANYOFUTF8:
2383 s = (char *) OPERAND(scan);
2384 if (!REGINCLASSUTF8(scan, (U8*)locinput))
2385 sayNO;
2386 if (locinput >= PL_regeol)
2387 sayNO;
2388 locinput += PL_utf8skip[nextchr];
2389 nextchr = UCHARAT(locinput);
2390 break;
2391 case ANYOF:
2392 s = (char *) OPERAND(scan);
2393 if (nextchr < 0)
2394 nextchr = UCHARAT(locinput);
2395 if (!REGINCLASS(s, nextchr))
2396 sayNO;
2397 if (!nextchr && locinput >= PL_regeol)
2398 sayNO;
2399 nextchr = UCHARAT(++locinput);
2400 break;
2401 case ALNUML:
2402 PL_reg_flags |= RF_tainted;
2403 /* FALL THROUGH */
2404 case ALNUM:
2405 if (!nextchr)
2406 sayNO;
2407 if (!(OP(scan) == ALNUM
2408 ? isALNUM(nextchr) : isALNUM_LC(nextchr)))
2409 sayNO;
2410 nextchr = UCHARAT(++locinput);
2411 break;
2412 case ALNUMLUTF8:
2413 PL_reg_flags |= RF_tainted;
2414 /* FALL THROUGH */
2415 case ALNUMUTF8:
2416 if (!nextchr)
2417 sayNO;
2418 if (nextchr & 0x80) {
2419 if (!(OP(scan) == ALNUMUTF8
2420 ? swash_fetch(PL_utf8_alnum, (U8*)locinput)
2421 : isALNUM_LC_utf8((U8*)locinput)))
2422 {
2423 sayNO;
2424 }
2425 locinput += PL_utf8skip[nextchr];
2426 nextchr = UCHARAT(locinput);
2427 break;
2428 }
2429 if (!(OP(scan) == ALNUMUTF8
2430 ? isALNUM(nextchr) : isALNUM_LC(nextchr)))
2431 sayNO;
2432 nextchr = UCHARAT(++locinput);
2433 break;
2434 case NALNUML:
2435 PL_reg_flags |= RF_tainted;
2436 /* FALL THROUGH */
2437 case NALNUM:
2438 if (!nextchr && locinput >= PL_regeol)
2439 sayNO;
2440 if (OP(scan) == NALNUM
2441 ? isALNUM(nextchr) : isALNUM_LC(nextchr))
2442 sayNO;
2443 nextchr = UCHARAT(++locinput);
2444 break;
2445 case NALNUMLUTF8:
2446 PL_reg_flags |= RF_tainted;
2447 /* FALL THROUGH */
2448 case NALNUMUTF8:
2449 if (!nextchr && locinput >= PL_regeol)
2450 sayNO;
2451 if (nextchr & 0x80) {
2452 if (OP(scan) == NALNUMUTF8
2453 ? swash_fetch(PL_utf8_alnum, (U8*)locinput)
2454 : isALNUM_LC_utf8((U8*)locinput))
2455 {
2456 sayNO;
2457 }
2458 locinput += PL_utf8skip[nextchr];
2459 nextchr = UCHARAT(locinput);
2460 break;
2461 }
2462 if (OP(scan) == NALNUMUTF8
2463 ? isALNUM(nextchr) : isALNUM_LC(nextchr))
2464 sayNO;
2465 nextchr = UCHARAT(++locinput);
2466 break;
2467 case BOUNDL:
2468 case NBOUNDL:
2469 PL_reg_flags |= RF_tainted;
2470 /* FALL THROUGH */
2471 case BOUND:
2472 case NBOUND:
2473 /* was last char in word? */
2474 ln = (locinput != PL_regbol) ? UCHARAT(locinput - 1) : PL_regprev;
2475 if (OP(scan) == BOUND || OP(scan) == NBOUND) {
2476 ln = isALNUM(ln);
2477 n = isALNUM(nextchr);
2478 }
2479 else {
2480 ln = isALNUM_LC(ln);
2481 n = isALNUM_LC(nextchr);
2482 }
2483 if (((!ln) == (!n)) == (OP(scan) == BOUND || OP(scan) == BOUNDL))
2484 sayNO;
2485 break;
2486 case BOUNDLUTF8:
2487 case NBOUNDLUTF8:
2488 PL_reg_flags |= RF_tainted;
2489 /* FALL THROUGH */
2490 case BOUNDUTF8:
2491 case NBOUNDUTF8:
2492 /* was last char in word? */
2493 ln = (locinput != PL_regbol)
2494 ? utf8_to_uv(reghop((U8*)locinput, -1), 0) : PL_regprev;
2495 if (OP(scan) == BOUNDUTF8 || OP(scan) == NBOUNDUTF8) {
2496 ln = isALNUM_uni(ln);
2497 n = swash_fetch(PL_utf8_alnum, (U8*)locinput);
2498 }
2499 else {
2500 ln = isALNUM_LC_uni(ln);
2501 n = isALNUM_LC_utf8((U8*)locinput);
2502 }
2503 if (((!ln) == (!n)) == (OP(scan) == BOUNDUTF8 || OP(scan) == BOUNDLUTF8))
2504 sayNO;
2505 break;
2506 case SPACEL:
2507 PL_reg_flags |= RF_tainted;
2508 /* FALL THROUGH */
2509 case SPACE:
2510 if (!nextchr && locinput >= PL_regeol)
2511 sayNO;
2512 if (!(OP(scan) == SPACE
2513 ? isSPACE(nextchr) : isSPACE_LC(nextchr)))
2514 sayNO;
2515 nextchr = UCHARAT(++locinput);
2516 break;
2517 case SPACELUTF8:
2518 PL_reg_flags |= RF_tainted;
2519 /* FALL THROUGH */
2520 case SPACEUTF8:
2521 if (!nextchr && locinput >= PL_regeol)
2522 sayNO;
2523 if (nextchr & 0x80) {
2524 if (!(OP(scan) == SPACEUTF8
2525 ? swash_fetch(PL_utf8_space,(U8*)locinput)
2526 : isSPACE_LC_utf8((U8*)locinput)))
2527 {
2528 sayNO;
2529 }
2530 locinput += PL_utf8skip[nextchr];
2531 nextchr = UCHARAT(locinput);
2532 break;
2533 }
2534 if (!(OP(scan) == SPACEUTF8
2535 ? isSPACE(nextchr) : isSPACE_LC(nextchr)))
2536 sayNO;
2537 nextchr = UCHARAT(++locinput);
2538 break;
2539 case NSPACEL:
2540 PL_reg_flags |= RF_tainted;
2541 /* FALL THROUGH */
2542 case NSPACE:
2543 if (!nextchr)
2544 sayNO;
2545 if (OP(scan) == SPACE
2546 ? isSPACE(nextchr) : isSPACE_LC(nextchr))
2547 sayNO;
2548 nextchr = UCHARAT(++locinput);
2549 break;
2550 case NSPACELUTF8:
2551 PL_reg_flags |= RF_tainted;
2552 /* FALL THROUGH */
2553 case NSPACEUTF8:
2554 if (!nextchr)
2555 sayNO;
2556 if (nextchr & 0x80) {
2557 if (OP(scan) == NSPACEUTF8
2558 ? swash_fetch(PL_utf8_space,(U8*)locinput)
2559 : isSPACE_LC_utf8((U8*)locinput))
2560 {
2561 sayNO;
2562 }
2563 locinput += PL_utf8skip[nextchr];
2564 nextchr = UCHARAT(locinput);
a0d0e21e
LW		 2565 break;
2566 }
b8c5462f
JH		 2567 if (OP(scan) == NSPACEUTF8
2568 ? isSPACE(nextchr) : isSPACE_LC(nextchr))
2569 sayNO;
2570 nextchr = UCHARAT(++locinput);
2571 break;
2572 case DIGITL:
2573 PL_reg_flags |= RF_tainted;
2574 /* FALL THROUGH */
2575 case DIGIT:
2576 if (!nextchr && locinput >= PL_regeol)
2577 sayNO;
2578 if (!(OP(scan) == DIGIT
2579 ? isDIGIT(nextchr) : isDIGIT_LC(nextchr)))
2580 sayNO;
2581 nextchr = UCHARAT(++locinput);
2582 break;
2583 case DIGITLUTF8:
2584 PL_reg_flags |= RF_tainted;
2585 /* FALL THROUGH */
2586 case DIGITUTF8:
2587 if (!nextchr)
2588 sayNO;
2589 if (nextchr & 0x80) {
2590 if (OP(scan) == NDIGITUTF8
2591 ? swash_fetch(PL_utf8_digit,(U8*)locinput)
2592 : isDIGIT_LC_utf8((U8*)locinput))
2593 {
2594 sayNO;
2595 }
2596 locinput += PL_utf8skip[nextchr];
2597 nextchr = UCHARAT(locinput);
a0d0e21e 2598 break;
b8c5462f
JH		 2599 }
2600 if (!isDIGIT(nextchr))
2601 sayNO;
2602 nextchr = UCHARAT(++locinput);
2603 break;
2604 case NDIGITL:
2605 PL_reg_flags |= RF_tainted;
2606 /* FALL THROUGH */
2607 case NDIGIT:
2608 if (!nextchr)
2609 sayNO;
2610 if (OP(scan) == DIGIT
2611 ? isDIGIT(nextchr) : isDIGIT_LC(nextchr))
2612 sayNO;
2613 nextchr = UCHARAT(++locinput);
2614 break;
2615 case NDIGITLUTF8:
2616 PL_reg_flags |= RF_tainted;
2617 /* FALL THROUGH */
2618 case NDIGITUTF8:
2619 if (!nextchr && locinput >= PL_regeol)
2620 sayNO;
2621 if (nextchr & 0x80) {
2622 if (swash_fetch(PL_utf8_digit,(U8*)locinput))
2623 sayNO;
2624 locinput += PL_utf8skip[nextchr];
2625 nextchr = UCHARAT(locinput);
a0d0e21e 2626 break;
b8c5462f
JH		 2627 }
2628 if (isDIGIT(nextchr))
4633a7c4 2629 sayNO;
b8c5462f 2630 nextchr = UCHARAT(++locinput);
a0d0e21e 2631 break;
b8c5462f
JH		 2632 case ALNUMCL:
2633 PL_reg_flags |= RF_tainted;
2634 /* FALL THROUGH */
2635 case ALNUMC:
2636 if (!nextchr)
4633a7c4 2637 sayNO;
b8c5462f
JH		 2638 if (!(OP(scan) == ALNUMC
2639 ? isALNUMC(nextchr) : isALNUMC_LC(nextchr)))
2640 sayNO;
2641 nextchr = UCHARAT(++locinput);
2642 break;
2643 case ALNUMCLUTF8:
2644 PL_reg_flags |= RF_tainted;
2645 /* FALL THROUGH */
2646 case ALNUMCUTF8:
2647 if (!nextchr)
2648 sayNO;
2649 if (nextchr & 0x80) {
2650 if (!(OP(scan) == ALNUMCUTF8
2651 ? swash_fetch(PL_utf8_alnumc, (U8*)locinput)
2652 : isALNUMC_LC_utf8((U8*)locinput)))
2653 {
2654 sayNO;
2655 }
2656 locinput += PL_utf8skip[nextchr];
2657 nextchr = UCHARAT(locinput);
2658 break;
2659 }
2660 if (!(OP(scan) == ALNUMCUTF8
2661 ? isALNUMC(nextchr) : isALNUMC_LC(nextchr)))
2662 sayNO;
2663 nextchr = UCHARAT(++locinput);
2664 break;
2665 case NALNUMCL:
2666 PL_reg_flags |= RF_tainted;
2667 /* FALL THROUGH */
2668 case NALNUMC:
2669 if (!nextchr)
2670 sayNO;
2671 if (OP(scan) == ALNUMC
2672 ? isALNUMC(nextchr) : isALNUMC_LC(nextchr))
2673 sayNO;
2674 nextchr = UCHARAT(++locinput);
2675 break;
2676 case NALNUMCLUTF8:
2677 PL_reg_flags |= RF_tainted;
2678 /* FALL THROUGH */
2679 case NALNUMCUTF8:
2680 if (!nextchr && locinput >= PL_regeol)
2681 sayNO;
2682 if (nextchr & 0x80) {
2683 if (swash_fetch(PL_utf8_alnumc,(U8*)locinput))
2684 sayNO;
2685 locinput += PL_utf8skip[nextchr];
2686 nextchr = UCHARAT(locinput);
2687 break;
2688 }
2689 if (isALNUMC(nextchr))
2690 sayNO;
2691 nextchr = UCHARAT(++locinput);
2692 break;
2693 case ALPHAL:
2694 PL_reg_flags |= RF_tainted;
2695 /* FALL THROUGH */
2696 case ALPHA:
2697 if (!nextchr)
2698 sayNO;
2699 if (!(OP(scan) == ALPHA
2700 ? isALPHA(nextchr) : isALPHA_LC(nextchr)))
2701 sayNO;
2702 nextchr = UCHARAT(++locinput);
2703 break;
2704 case ALPHALUTF8:
2705 PL_reg_flags |= RF_tainted;
2706 /* FALL THROUGH */
2707 case ALPHAUTF8:
2708 if (!nextchr)
2709 sayNO;
2710 if (nextchr & 0x80) {
2711 if (!(OP(scan) == ALPHAUTF8
2712 ? swash_fetch(PL_utf8_alpha, (U8*)locinput)
2713 : isALPHA_LC_utf8((U8*)locinput)))
2714 {
2715 sayNO;
2716 }
2717 locinput += PL_utf8skip[nextchr];
2718 nextchr = UCHARAT(locinput);
2719 break;
2720 }
2721 if (!(OP(scan) == ALPHAUTF8
2722 ? isALPHA(nextchr) : isALPHA_LC(nextchr)))
2723 sayNO;
2724 nextchr = UCHARAT(++locinput);
2725 break;
2726 case NALPHAL:
2727 PL_reg_flags |= RF_tainted;
2728 /* FALL THROUGH */
2729 case NALPHA:
2730 if (!nextchr)
2731 sayNO;
2732 if (OP(scan) == ALPHA
2733 ? isALPHA(nextchr) : isALPHA_LC(nextchr))
2734 sayNO;
2735 nextchr = UCHARAT(++locinput);
2736 break;
2737 case NALPHALUTF8:
2738 PL_reg_flags |= RF_tainted;
2739 /* FALL THROUGH */
2740 case NALPHAUTF8:
2741 if (!nextchr && locinput >= PL_regeol)
2742 sayNO;
2743 if (nextchr & 0x80) {
2744 if (swash_fetch(PL_utf8_alpha,(U8*)locinput))
2745 sayNO;
2746 locinput += PL_utf8skip[nextchr];
2747 nextchr = UCHARAT(locinput);
2748 break;
2749 }
2750 if (isALPHA(nextchr))
2751 sayNO;
2752 nextchr = UCHARAT(++locinput);
2753 break;
2754 case ASCII:
2755 if (!nextchr && locinput >= PL_regeol)
2756 sayNO;
2757 if (!isASCII(nextchr))
2758 sayNO;
2759 nextchr = UCHARAT(++locinput);
2760 break;
2761 case NASCII:
2762 if (!nextchr && locinput >= PL_regeol)
2763 sayNO;
2764 if (isASCII(nextchr))
2765 sayNO;
2766 nextchr = UCHARAT(++locinput);
2767 break;
2768 case CNTRLL:
2769 PL_reg_flags |= RF_tainted;
2770 /* FALL THROUGH */
2771 case CNTRL:
2772 if (!nextchr)
2773 sayNO;
2774 if (!(OP(scan) == CNTRL
2775 ? isCNTRL(nextchr) : isCNTRL_LC(nextchr)))
2776 sayNO;
2777 nextchr = UCHARAT(++locinput);
2778 break;
2779 case CNTRLLUTF8:
2780 PL_reg_flags |= RF_tainted;
2781 /* FALL THROUGH */
2782 case CNTRLUTF8:
2783 if (!nextchr)
2784 sayNO;
2785 if (nextchr & 0x80) {
2786 if (!(OP(scan) == CNTRLUTF8
2787 ? swash_fetch(PL_utf8_cntrl, (U8*)locinput)
2788 : isCNTRL_LC_utf8((U8*)locinput)))
2789 {
2790 sayNO;
2791 }
2792 locinput += PL_utf8skip[nextchr];
2793 nextchr = UCHARAT(locinput);
2794 break;
2795 }
2796 if (!(OP(scan) == CNTRLUTF8
2797 ? isCNTRL(nextchr) : isCNTRL_LC(nextchr)))
4633a7c4 2798 sayNO;
b8c5462f 2799 nextchr = UCHARAT(++locinput);
a0d0e21e 2800 break;
b8c5462f
JH		 2801 case NCNTRLL:
2802 PL_reg_flags |= RF_tainted;
2803 /* FALL THROUGH */
2804 case NCNTRL:
2805 if (!nextchr)
b85d18e9 2806 sayNO;
b8c5462f
JH		 2807 if (OP(scan) == CNTRL
2808 ? isCNTRL(nextchr) : isCNTRL_LC(nextchr))
2809 sayNO;
2810 nextchr = UCHARAT(++locinput);
b85d18e9 2811 break;
b8c5462f
JH		 2812 case NCNTRLLUTF8:
2813 PL_reg_flags |= RF_tainted;
2814 /* FALL THROUGH */
2815 case NCNTRLUTF8:
2816 if (!nextchr && locinput >= PL_regeol)
2817 sayNO;
a0ed51b3 2818 if (nextchr & 0x80) {
b8c5462f 2819 if (swash_fetch(PL_utf8_cntrl,(U8*)locinput))
a0ed51b3 2820 sayNO;
b8c5462f 2821 locinput += PL_utf8skip[nextchr];
a0ed51b3
LW		 2822 nextchr = UCHARAT(locinput);
2823 break;
2824 }
b8c5462f 2825 if (isCNTRL(nextchr))
a0ed51b3
LW		 2826 sayNO;
2827 nextchr = UCHARAT(++locinput);
2828 break;
b8c5462f
JH		 2829 case GRAPHL:
2830 PL_reg_flags |= RF_tainted;
2831 /* FALL THROUGH */
2832 case GRAPH:
2833 if (!nextchr)
2834 sayNO;
2835 if (!(OP(scan) == GRAPH
2836 ? isGRAPH(nextchr) : isGRAPH_LC(nextchr)))
4633a7c4 2837 sayNO;
76e3520e 2838 nextchr = UCHARAT(++locinput);
a0d0e21e 2839 break;
b8c5462f
JH		 2840 case GRAPHLUTF8:
2841 PL_reg_flags |= RF_tainted;
2842 /* FALL THROUGH */
2843 case GRAPHUTF8:
2844 if (!nextchr)
2845 sayNO;
a0ed51b3 2846 if (nextchr & 0x80) {
b8c5462f
JH		 2847 if (!(OP(scan) == GRAPHUTF8
2848 ? swash_fetch(PL_utf8_graph, (U8*)locinput)
2849 : isGRAPH_LC_utf8((U8*)locinput)))
2850 {
a0ed51b3 2851 sayNO;
b8c5462f
JH		 2852 }
2853 locinput += PL_utf8skip[nextchr];
a0ed51b3
LW		 2854 nextchr = UCHARAT(locinput);
2855 break;
2856 }
b8c5462f
JH		 2857 if (!(OP(scan) == GRAPHUTF8
2858 ? isGRAPH(nextchr) : isGRAPH_LC(nextchr)))
a0ed51b3
LW		 2859 sayNO;
2860 nextchr = UCHARAT(++locinput);
2861 break;
b8c5462f
JH		 2862 case NGRAPHL:
2863 PL_reg_flags |= RF_tainted;
2864 /* FALL THROUGH */
2865 case NGRAPH:
2866 if (!nextchr)
2867 sayNO;
2868 if (OP(scan) == GRAPH
2869 ? isGRAPH(nextchr) : isGRAPH_LC(nextchr))
4633a7c4 2870 sayNO;
76e3520e 2871 nextchr = UCHARAT(++locinput);
a0d0e21e 2872 break;
b8c5462f
JH		 2873 case NGRAPHLUTF8:
2874 PL_reg_flags |= RF_tainted;
2875 /* FALL THROUGH */
2876 case NGRAPHUTF8:
2877 if (!nextchr && locinput >= PL_regeol)
4633a7c4 2878 sayNO;
b8c5462f
JH		 2879 if (nextchr & 0x80) {
2880 if (swash_fetch(PL_utf8_graph,(U8*)locinput))
2881 sayNO;
2882 locinput += PL_utf8skip[nextchr];
2883 nextchr = UCHARAT(locinput);
2884 break;
2885 }
2886 if (isGRAPH(nextchr))
4633a7c4 2887 sayNO;
b8c5462f
JH		 2888 nextchr = UCHARAT(++locinput);
2889 break;
2890 case LOWERL:
2891 PL_reg_flags |= RF_tainted;
2892 /* FALL THROUGH */
2893 case LOWER:
2894 if (!nextchr)
4633a7c4 2895 sayNO;
b8c5462f
JH		 2896 if (!(OP(scan) == LOWER
2897 ? isLOWER(nextchr) : isLOWER_LC(nextchr)))
2898 sayNO;
2899 nextchr = UCHARAT(++locinput);
bbce6d69 2900 break;
b8c5462f 2901 case LOWERLUTF8:
3280af22 2902 PL_reg_flags |= RF_tainted;
bbce6d69 2903 /* FALL THROUGH */
b8c5462f
JH		 2904 case LOWERUTF8:
2905 if (!nextchr)
2906 sayNO;
2907 if (nextchr & 0x80) {
2908 if (!(OP(scan) == LOWERUTF8
2909 ? swash_fetch(PL_utf8_lower, (U8*)locinput)
2910 : isLOWER_LC_utf8((U8*)locinput)))
2911 {
2912 sayNO;
a0ed51b3 2913 }
b8c5462f 2914 locinput += PL_utf8skip[nextchr];
a0ed51b3
LW		 2915 nextchr = UCHARAT(locinput);
2916 break;
2917 }
b8c5462f
JH		 2918 if (!(OP(scan) == LOWERUTF8
2919 ? isLOWER(nextchr) : isLOWER_LC(nextchr)))
bbce6d69 2920 sayNO;
b8c5462f 2921 nextchr = UCHARAT(++locinput);
a0d0e21e 2922 break;
b8c5462f
JH		 2923 case NLOWERL:
2924 PL_reg_flags |= RF_tainted;
2925 /* FALL THROUGH */
2926 case NLOWER:
2927 if (!nextchr)
a0ed51b3 2928 sayNO;
b8c5462f
JH		 2929 if (OP(scan) == LOWER
2930 ? isLOWER(nextchr) : isLOWER_LC(nextchr))
a0ed51b3 2931 sayNO;
b8c5462f 2932 nextchr = UCHARAT(++locinput);
a0ed51b3 2933 break;
b8c5462f
JH		 2934 case NLOWERLUTF8:
2935 PL_reg_flags |= RF_tainted;
2936 /* FALL THROUGH */
2937 case NLOWERUTF8:
3280af22 2938 if (!nextchr && locinput >= PL_regeol)
4633a7c4 2939 sayNO;
b8c5462f
JH		 2940 if (nextchr & 0x80) {
2941 if (swash_fetch(PL_utf8_lower,(U8*)locinput))
2942 sayNO;
2943 locinput += PL_utf8skip[nextchr];
2944 nextchr = UCHARAT(locinput);
2945 break;
2946 }
2947 if (isLOWER(nextchr))
2948 sayNO;
76e3520e 2949 nextchr = UCHARAT(++locinput);
a0d0e21e 2950 break;
b8c5462f 2951 case PRINTL:
3280af22 2952 PL_reg_flags |= RF_tainted;
bbce6d69 2953 /* FALL THROUGH */
b8c5462f 2954 case PRINT:
76e3520e 2955 if (!nextchr)
4633a7c4 2956 sayNO;
b8c5462f
JH		 2957 if (!(OP(scan) == PRINT
2958 ? isPRINT(nextchr) : isPRINT_LC(nextchr)))
4633a7c4 2959 sayNO;
76e3520e 2960 nextchr = UCHARAT(++locinput);
a0d0e21e 2961 break;
b8c5462f 2962 case PRINTLUTF8:
a0ed51b3
LW		 2963 PL_reg_flags |= RF_tainted;
2964 /* FALL THROUGH */
b8c5462f 2965 case PRINTUTF8:
a0ed51b3
LW		 2966 if (!nextchr)
2967 sayNO;
2968 if (nextchr & 0x80) {
b8c5462f
JH		 2969 if (!(OP(scan) == PRINTUTF8
2970 ? swash_fetch(PL_utf8_print, (U8*)locinput)
2971 : isPRINT_LC_utf8((U8*)locinput)))
dfe13c55 2972 {
a0ed51b3 2973 sayNO;
dfe13c55 2974 }
6f06b55f 2975 locinput += PL_utf8skip[nextchr];
a0ed51b3
LW		 2976 nextchr = UCHARAT(locinput);
2977 break;
2978 }
b8c5462f
JH		 2979 if (!(OP(scan) == PRINTUTF8
2980 ? isPRINT(nextchr) : isPRINT_LC(nextchr)))
a0ed51b3
LW		 2981 sayNO;
2982 nextchr = UCHARAT(++locinput);
2983 break;
b8c5462f 2984 case NPRINTL:
3280af22 2985 PL_reg_flags |= RF_tainted;
bbce6d69 2986 /* FALL THROUGH */
b8c5462f
JH		 2987 case NPRINT:
2988 if (!nextchr)
4633a7c4 2989 sayNO;
b8c5462f
JH		 2990 if (OP(scan) == PRINT
2991 ? isPRINT(nextchr) : isPRINT_LC(nextchr))
4633a7c4 2992 sayNO;
76e3520e 2993 nextchr = UCHARAT(++locinput);
a0d0e21e 2994 break;
b8c5462f 2995 case NPRINTLUTF8:
a0ed51b3
LW		 2996 PL_reg_flags |= RF_tainted;
2997 /* FALL THROUGH */
b8c5462f 2998 case NPRINTUTF8:
a0ed51b3
LW		 2999 if (!nextchr && locinput >= PL_regeol)
3000 sayNO;
3001 if (nextchr & 0x80) {
b8c5462f 3002 if (swash_fetch(PL_utf8_print,(U8*)locinput))
a0ed51b3 3003 sayNO;
6f06b55f 3004 locinput += PL_utf8skip[nextchr];
a0ed51b3
LW		 3005 nextchr = UCHARAT(locinput);
3006 break;
3007 }
b8c5462f 3008 if (isPRINT(nextchr))
a0ed51b3
LW		 3009 sayNO;
3010 nextchr = UCHARAT(++locinput);
3011 break;
b8c5462f 3012 case PUNCTL:
3280af22 3013 PL_reg_flags |= RF_tainted;
bbce6d69 3014 /* FALL THROUGH */
b8c5462f
JH		 3015 case PUNCT:
3016 if (!nextchr)
3017 sayNO;
3018 if (!(OP(scan) == PUNCT
3019 ? isPUNCT(nextchr) : isPUNCT_LC(nextchr)))
4633a7c4 3020 sayNO;
b8c5462f 3021 nextchr = UCHARAT(++locinput);
a0d0e21e 3022 break;
b8c5462f 3023 case PUNCTLUTF8:
a0ed51b3
LW		 3024 PL_reg_flags |= RF_tainted;
3025 /* FALL THROUGH */
b8c5462f
JH		 3026 case PUNCTUTF8:
3027 if (!nextchr)
3028 sayNO;
3029 if (nextchr & 0x80) {
3030 if (!(OP(scan) == PUNCTUTF8
3031 ? swash_fetch(PL_utf8_punct, (U8*)locinput)
3032 : isPUNCT_LC_utf8((U8*)locinput)))
3033 {
3034 sayNO;
3035 }
3036 locinput += PL_utf8skip[nextchr];
3037 nextchr = UCHARAT(locinput);
3038 break;
a0ed51b3 3039 }
b8c5462f
JH		 3040 if (!(OP(scan) == PUNCTUTF8
3041 ? isPUNCT(nextchr) : isPUNCT_LC(nextchr)))
a0ed51b3 3042 sayNO;
b8c5462f 3043 nextchr = UCHARAT(++locinput);
a0ed51b3 3044 break;
b8c5462f 3045 case NPUNCTL:
3280af22 3046 PL_reg_flags |= RF_tainted;
bbce6d69 3047 /* FALL THROUGH */
b8c5462f
JH		 3048 case NPUNCT:
3049 if (!nextchr)
4633a7c4 3050 sayNO;
b8c5462f
JH		 3051 if (OP(scan) == PUNCT
3052 ? isPUNCT(nextchr) : isPUNCT_LC(nextchr))
4633a7c4 3053 sayNO;
76e3520e 3054 nextchr = UCHARAT(++locinput);
a0d0e21e 3055 break;
b8c5462f 3056 case NPUNCTLUTF8:
a0ed51b3
LW		 3057 PL_reg_flags |= RF_tainted;
3058 /* FALL THROUGH */
b8c5462f 3059 case NPUNCTUTF8:
a0ed51b3
LW		 3060 if (!nextchr && locinput >= PL_regeol)
3061 sayNO;
3062 if (nextchr & 0x80) {
b8c5462f 3063 if (swash_fetch(PL_utf8_punct,(U8*)locinput))
a0ed51b3 3064 sayNO;
6f06b55f 3065 locinput += PL_utf8skip[nextchr];
a0ed51b3
LW		 3066 nextchr = UCHARAT(locinput);
3067 break;
3068 }
b8c5462f 3069 if (isPUNCT(nextchr))
a0ed51b3
LW		 3070 sayNO;
3071 nextchr = UCHARAT(++locinput);
3072 break;
b8c5462f 3073 case UPPERL:
3280af22 3074 PL_reg_flags |= RF_tainted;
bbce6d69 3075 /* FALL THROUGH */
b8c5462f 3076 case UPPER:
76e3520e 3077 if (!nextchr)
4633a7c4 3078 sayNO;
b8c5462f
JH		 3079 if (!(OP(scan) == UPPER
3080 ? isUPPER(nextchr) : isUPPER_LC(nextchr)))
4633a7c4 3081 sayNO;
76e3520e 3082 nextchr = UCHARAT(++locinput);
a0d0e21e 3083 break;
b8c5462f 3084 case UPPERLUTF8:
a0ed51b3
LW		 3085 PL_reg_flags |= RF_tainted;
3086 /* FALL THROUGH */
b8c5462f 3087 case UPPERUTF8:
a0ed51b3
LW		 3088 if (!nextchr)
3089 sayNO;
3090 if (nextchr & 0x80) {
b8c5462f
JH		 3091 if (!(OP(scan) == UPPERUTF8
3092 ? swash_fetch(PL_utf8_upper, (U8*)locinput)
3093 : isUPPER_LC_utf8((U8*)locinput)))
dfe13c55 3094 {
a0ed51b3 3095 sayNO;
dfe13c55 3096 }
6f06b55f 3097 locinput += PL_utf8skip[nextchr];
a0ed51b3
LW		 3098 nextchr = UCHARAT(locinput);
3099 break;
3100 }
b8c5462f
JH		 3101 if (!(OP(scan) == UPPERUTF8
3102 ? isUPPER(nextchr) : isUPPER_LC(nextchr)))
a0ed51b3
LW		 3103 sayNO;
3104 nextchr = UCHARAT(++locinput);
3105 break;
b8c5462f
JH		 3106 case NUPPERL:
3107 PL_reg_flags |= RF_tainted;
3108 /* FALL THROUGH */
3109 case NUPPER:
3110 if (!nextchr)
3111 sayNO;
3112 if (OP(scan) == UPPER
3113 ? isUPPER(nextchr) : isUPPER_LC(nextchr))
4633a7c4 3114 sayNO;
76e3520e 3115 nextchr = UCHARAT(++locinput);
a0d0e21e 3116 break;
b8c5462f
JH		 3117 case NUPPERLUTF8:
3118 PL_reg_flags |= RF_tainted;
3119 /* FALL THROUGH */
3120 case NUPPERUTF8:
3121 if (!nextchr && locinput >= PL_regeol)
3122 sayNO;
a0ed51b3 3123 if (nextchr & 0x80) {
b8c5462f 3124 if (swash_fetch(PL_utf8_upper,(U8*)locinput))
a0ed51b3 3125 sayNO;
6f06b55f 3126 locinput += PL_utf8skip[nextchr];
a0ed51b3
LW		 3127 nextchr = UCHARAT(locinput);
3128 break;
3129 }
b8c5462f 3130 if (isUPPER(nextchr))
a0ed51b3
LW		 3131 sayNO;
3132 nextchr = UCHARAT(++locinput);
3133 break;
b8c5462f 3134 case XDIGIT:
3280af22 3135 if (!nextchr && locinput >= PL_regeol)
4633a7c4 3136 sayNO;
b8c5462f 3137 if (!isXDIGIT(nextchr))
4633a7c4 3138 sayNO;
76e3520e 3139 nextchr = UCHARAT(++locinput);
a0d0e21e 3140 break;
b8c5462f 3141 case NXDIGIT:
a0ed51b3
LW		 3142 if (!nextchr && locinput >= PL_regeol)
3143 sayNO;
b8c5462f 3144 if (isXDIGIT(nextchr))
a0ed51b3
LW		 3145 sayNO;
3146 nextchr = UCHARAT(++locinput);
3147 break;
3148 case CLUMP:
dfe13c55 3149 if (locinput >= PL_regeol || swash_fetch(PL_utf8_mark,(U8*)locinput))
a0ed51b3 3150 sayNO;
6f06b55f 3151 locinput += PL_utf8skip[nextchr];
dfe13c55 3152 while (locinput < PL_regeol && swash_fetch(PL_utf8_mark,(U8*)locinput))
a0ed51b3
LW		 3153 locinput += UTF8SKIP(locinput);
3154 if (locinput > PL_regeol)
3155 sayNO;
3156 nextchr = UCHARAT(locinput);
3157 break;
c8756f30 3158 case REFFL:
3280af22 3159 PL_reg_flags |= RF_tainted;
c8756f30 3160 /* FALL THROUGH */
c277df42 3161 case REF:
c8756f30 3162 case REFF:
c277df42 3163 n = ARG(scan); /* which paren pair */
cf93c79d
IZ		 3164 ln = PL_regstartp[n];
3165 if (*PL_reglastparen < n || ln == -1)
af3f8c16 3166 sayNO; /* Do not match unless seen CLOSEn. */
cf93c79d 3167 if (ln == PL_regendp[n])
a0d0e21e 3168 break;
a0ed51b3 3169
cf93c79d 3170 s = PL_bostr + ln;
a0ed51b3
LW		 3171 if (UTF && OP(scan) != REF) { /* REF can do byte comparison */
3172 char *l = locinput;
cf93c79d 3173 char *e = PL_bostr + PL_regendp[n];
a0ed51b3
LW		 3174 /*
3175 * Note that we can't do the "other character" lookup trick as
3176 * in the 8-bit case (no pun intended) because in Unicode we
3177 * have to map both upper and title case to lower case.
3178 */
3179 if (OP(scan) == REFF) {
3180 while (s < e) {
3181 if (l >= PL_regeol)
3182 sayNO;
dfe13c55 3183 if (toLOWER_utf8((U8*)s) != toLOWER_utf8((U8*)l))
a0ed51b3
LW		 3184 sayNO;
3185 s += UTF8SKIP(s);
3186 l += UTF8SKIP(l);
3187 }
3188 }
3189 else {
3190 while (s < e) {
3191 if (l >= PL_regeol)
3192 sayNO;
dfe13c55 3193 if (toLOWER_LC_utf8((U8*)s) != toLOWER_LC_utf8((U8*)l))
a0ed51b3
LW		 3194 sayNO;
3195 s += UTF8SKIP(s);
3196 l += UTF8SKIP(l);
3197 }
3198 }
3199 locinput = l;
3200 nextchr = UCHARAT(locinput);
3201 break;
3202 }
3203
a0d0e21e 3204 /* Inline the first character, for speed. */
76e3520e 3205 if (UCHARAT(s) != nextchr &&
c8756f30
AK		 3206 (OP(scan) == REF ||
3207 (UCHARAT(s) != ((OP(scan) == REFF
22c35a8c 3208 ? PL_fold : PL_fold_locale)[nextchr]))))
4633a7c4 3209 sayNO;
cf93c79d 3210 ln = PL_regendp[n] - ln;
3280af22 3211 if (locinput + ln > PL_regeol)
4633a7c4 3212 sayNO;
c8756f30
AK		 3213 if (ln > 1 && (OP(scan) == REF
3214 ? memNE(s, locinput, ln)
3215 : (OP(scan) == REFF
3216 ? ibcmp(s, locinput, ln)
3217 : ibcmp_locale(s, locinput, ln))))
4633a7c4 3218 sayNO;
a0d0e21e 3219 locinput += ln;
76e3520e 3220 nextchr = UCHARAT(locinput);
a0d0e21e
LW		 3221 break;
3222
3223 case NOTHING:
c277df42 3224 case TAIL:
a0d0e21e
LW		 3225 break;
3226 case BACK:
3227 break;
c277df42
IZ		 3228 case EVAL:
3229 {
3230 dSP;
533c011a 3231 OP_4tree *oop = PL_op;
3280af22
NIS		 3232 COP *ocurcop = PL_curcop;
3233 SV **ocurpad = PL_curpad;
c277df42
IZ		 3234 SV *ret;
3235
3236 n = ARG(scan);
533c011a
NIS		 3237 PL_op = (OP_4tree*)PL_regdata->data[n];
3238 DEBUG_r( PerlIO_printf(Perl_debug_log, " re_eval 0x%x\n", PL_op) );
dfad63ad 3239 PL_curpad = AvARRAY((AV*)PL_regdata->data[n + 2]);
cf93c79d 3240 PL_regendp[0] = PL_reg_magic->mg_len = locinput - PL_bostr;
c277df42 3241
cea2e8a9 3242 CALLRUNOPS(aTHX); /* Scalar context. */
c277df42
IZ		 3243 SPAGAIN;
3244 ret = POPs;
3245 PUTBACK;
3246
0f5d15d6
IZ		 3247 PL_op = oop;
3248 PL_curpad = ocurpad;
3249 PL_curcop = ocurcop;
c277df42 3250 if (logical) {
0f5d15d6
IZ		 3251 if (logical == 2) { /* Postponed subexpression. */
3252 regexp *re;
22c35a8c 3253 MAGIC *mg = Null(MAGIC*);
0f5d15d6
IZ		 3254 re_cc_state state;
3255 CURCUR cctmp;
3256 CHECKPOINT cp, lastcp;
3257
3258 if(SvROK(ret) || SvRMAGICAL(ret)) {
3259 SV *sv = SvROK(ret) ? SvRV(ret) : ret;
3260
3261 if(SvMAGICAL(sv))
3262 mg = mg_find(sv, 'r');
3263 }
3264 if (mg) {
3265 re = (regexp *)mg->mg_obj;
df0003d4 3266 (void)ReREFCNT_inc(re);
0f5d15d6
IZ		 3267 }
3268 else {
3269 STRLEN len;
3270 char *t = SvPV(ret, len);
3271 PMOP pm;
3272 char *oprecomp = PL_regprecomp;
3273 I32 osize = PL_regsize;
3274 I32 onpar = PL_regnpar;
3275
3276 pm.op_pmflags = 0;
cea2e8a9 3277 re = CALLREGCOMP(aTHX_ t, t + len, &pm);
0f5d15d6
IZ		 3278 if (!(SvFLAGS(ret)
3279 & (SVs_TEMP | SVs_PADTMP | SVf_READONLY)))
3280 sv_magic(ret,(SV*)ReREFCNT_inc(re),'r',0,0);
3281 PL_regprecomp = oprecomp;
3282 PL_regsize = osize;
3283 PL_regnpar = onpar;
3284 }
3285 DEBUG_r(
3286 PerlIO_printf(Perl_debug_log,
3287 "Entering embedded `%s%.60s%s%s'\n",
3288 PL_colors[0],
3289 re->precomp,
3290 PL_colors[1],
3291 (strlen(re->precomp) > 60 ? "..." : ""))
3292 );
3293 state.node = next;
3294 state.prev = PL_reg_call_cc;
3295 state.cc = PL_regcc;
3296 state.re = PL_reg_re;
3297
3298 cctmp.cur = 0;
3299 cctmp.oldcc = 0;
3300 PL_regcc = &cctmp;
3301
3302 cp = regcppush(0); /* Save *all* the positions. */
3303 REGCP_SET;
3304 cache_re(re);
3305 state.ss = PL_savestack_ix;
3306 *PL_reglastparen = 0;
3307 PL_reg_call_cc = &state;
3308 PL_reginput = locinput;
3309 if (regmatch(re->program + 1)) {
3310 ReREFCNT_dec(re);
3311 regcpblow(cp);
3312 sayYES;
3313 }
3314 DEBUG_r(
3315 PerlIO_printf(Perl_debug_log,
3316 "%*s failed...\n",
3317 REPORT_CODE_OFF+PL_regindent*2, "")
3318 );
3319 ReREFCNT_dec(re);
3320 REGCP_UNWIND;
3321 regcppop();
3322 PL_reg_call_cc = state.prev;
3323 PL_regcc = state.cc;
3324 PL_reg_re = state.re;
d3790889 3325 cache_re(PL_reg_re);
0f5d15d6
IZ		 3326 sayNO;
3327 }
c277df42 3328 sw = SvTRUE(ret);
0f5d15d6 3329 logical = 0;
a0ed51b3
LW		 3330 }
3331 else
3280af22 3332 sv_setsv(save_scalar(PL_replgv), ret);
c277df42
IZ		 3333 break;
3334 }
a0d0e21e 3335 case OPEN:
c277df42 3336 n = ARG(scan); /* which paren pair */
3280af22
NIS		 3337 PL_reg_start_tmp[n] = locinput;
3338 if (n > PL_regsize)
3339 PL_regsize = n;
a0d0e21e
LW		 3340 break;
3341 case CLOSE:
c277df42 3342 n = ARG(scan); /* which paren pair */
cf93c79d
IZ		 3343 PL_regstartp[n] = PL_reg_start_tmp[n] - PL_bostr;
3344 PL_regendp[n] = locinput - PL_bostr;
3280af22
NIS		 3345 if (n > *PL_reglastparen)
3346 *PL_reglastparen = n;
a0d0e21e 3347 break;
c277df42
IZ		 3348 case GROUPP:
3349 n = ARG(scan); /* which paren pair */
cf93c79d 3350 sw = (*PL_reglastparen >= n && PL_regendp[n] != -1);
c277df42
IZ		 3351 break;
3352 case IFTHEN:
3353 if (sw)
3354 next = NEXTOPER(NEXTOPER(scan));
3355 else {
3356 next = scan + ARG(scan);
3357 if (OP(next) == IFTHEN) /* Fake one. */
3358 next = NEXTOPER(NEXTOPER(next));
3359 }
3360 break;
3361 case LOGICAL:
0f5d15d6 3362 logical = scan->flags;
c277df42 3363 break;
a0d0e21e
LW		 3364 case CURLYX: {
3365 CURCUR cc;
3280af22 3366 CHECKPOINT cp = PL_savestack_ix;
c277df42
IZ		 3367
3368 if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */
3369 next += ARG(next);
3280af22
NIS		 3370 cc.oldcc = PL_regcc;
3371 PL_regcc = &cc;
3372 cc.parenfloor = *PL_reglastparen;
a0d0e21e
LW		 3373 cc.cur = -1;
3374 cc.min = ARG1(scan);
3375 cc.max = ARG2(scan);
c277df42 3376 cc.scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS;
a0d0e21e
LW		 3377 cc.next = next;
3378 cc.minmod = minmod;
3379 cc.lastloc = 0;
3280af22 3380 PL_reginput = locinput;
a0d0e21e
LW		 3381 n = regmatch(PREVOPER(next)); /* start on the WHILEM */
3382 regcpblow(cp);
3280af22 3383 PL_regcc = cc.oldcc;
4633a7c4 3384 saySAME(n);
a0d0e21e
LW		 3385 }
3386 /* NOT REACHED */
3387 case WHILEM: {
3388 /*
3389 * This is really hard to understand, because after we match
3390 * what we're trying to match, we must make sure the rest of
3391 * the RE is going to match for sure, and to do that we have
3392 * to go back UP the parse tree by recursing ever deeper. And
3393 * if it fails, we have to reset our parent's current state
3394 * that we can try again after backing off.
3395 */
3396
c277df42 3397 CHECKPOINT cp, lastcp;
3280af22 3398 CURCUR* cc = PL_regcc;
c277df42
IZ		 3399 char *lastloc = cc->lastloc; /* Detection of 0-len. */
3400
4633a7c4 3401 n = cc->cur + 1; /* how many we know we matched */
3280af22 3402 PL_reginput = locinput;
a0d0e21e 3403
c277df42
IZ		 3404 DEBUG_r(
3405 PerlIO_printf(Perl_debug_log,
3406 "%*s %ld out of %ld..%ld cc=%lx\n",
3280af22 3407 REPORT_CODE_OFF+PL_regindent*2, "",
c277df42
IZ		 3408 (long)n, (long)cc->min,
3409 (long)cc->max, (long)cc)
3410 );
4633a7c4 3411
a0d0e21e
LW		 3412 /* If degenerate scan matches "", assume scan done. */
3413
579cf2c3 3414 if (locinput == cc->lastloc && n >= cc->min) {
3280af22
NIS		 3415 PL_regcc = cc->oldcc;
3416 ln = PL_regcc->cur;
c277df42 3417 DEBUG_r(
c3464db5
DD		 3418 PerlIO_printf(Perl_debug_log,
3419 "%*s empty match detected, try continuation...\n",
3280af22 3420 REPORT_CODE_OFF+PL_regindent*2, "")
c277df42 3421 );
a0d0e21e 3422 if (regmatch(cc->next))
4633a7c4 3423 sayYES;
c277df42 3424 DEBUG_r(
c3464db5
DD		 3425 PerlIO_printf(Perl_debug_log,
3426 "%*s failed...\n",
3280af22 3427 REPORT_CODE_OFF+PL_regindent*2, "")
c277df42 3428 );
3280af22
NIS		 3429 PL_regcc->cur = ln;
3430 PL_regcc = cc;
4633a7c4 3431 sayNO;
a0d0e21e
LW		 3432 }
3433
3434 /* First just match a string of min scans. */
3435
3436 if (n < cc->min) {
3437 cc->cur = n;
3438 cc->lastloc = locinput;
4633a7c4
LW		 3439 if (regmatch(cc->scan))
3440 sayYES;
3441 cc->cur = n - 1;
c277df42
IZ		 3442 cc->lastloc = lastloc;
3443 DEBUG_r(
c3464db5
DD		 3444 PerlIO_printf(Perl_debug_log,
3445 "%*s failed...\n",
3280af22 3446 REPORT_CODE_OFF+PL_regindent*2, "")
c277df42 3447 );
4633a7c4 3448 sayNO;
a0d0e21e
LW		 3449 }
3450
3451 /* Prefer next over scan for minimal matching. */
3452
3453 if (cc->minmod) {
3280af22
NIS		 3454 PL_regcc = cc->oldcc;
3455 ln = PL_regcc->cur;
5f05dabc 3456 cp = regcppush(cc->parenfloor);
c277df42 3457 REGCP_SET;
5f05dabc 3458 if (regmatch(cc->next)) {
c277df42 3459 regcpblow(cp);
4633a7c4 3460 sayYES; /* All done. */
5f05dabc 3461 }
c277df42 3462 REGCP_UNWIND;
5f05dabc 3463 regcppop();
3280af22
NIS		 3464 PL_regcc->cur = ln;
3465 PL_regcc = cc;
a0d0e21e 3466
c277df42 3467 if (n >= cc->max) { /* Maximum greed exceeded? */
599cee73 3468 if (ckWARN(WARN_UNSAFE) && n >= REG_INFTY
3280af22
NIS		 3469 && !(PL_reg_flags & RF_warned)) {
3470 PL_reg_flags |= RF_warned;
cea2e8a9 3471 Perl_warner(aTHX_ WARN_UNSAFE, "%s limit (%d) exceeded",
2f3ca594
GS		 3472 "Complex regular subexpression recursion",
3473 REG_INFTY - 1);
c277df42 3474 }
4633a7c4 3475 sayNO;
c277df42 3476 }
a687059c 3477
c277df42 3478 DEBUG_r(
c3464db5
DD		 3479 PerlIO_printf(Perl_debug_log,
3480 "%*s trying longer...\n",
3280af22 3481 REPORT_CODE_OFF+PL_regindent*2, "")
c277df42 3482 );
a0d0e21e 3483 /* Try scanning more and see if it helps. */
3280af22 3484 PL_reginput = locinput;
a0d0e21e
LW		 3485 cc->cur = n;
3486 cc->lastloc = locinput;
5f05dabc 3487 cp = regcppush(cc->parenfloor);
c277df42 3488 REGCP_SET;
5f05dabc 3489 if (regmatch(cc->scan)) {
c277df42 3490 regcpblow(cp);
4633a7c4 3491 sayYES;
5f05dabc 3492 }
c277df42 3493 DEBUG_r(
c3464db5
DD		 3494 PerlIO_printf(Perl_debug_log,
3495 "%*s failed...\n",
3280af22 3496 REPORT_CODE_OFF+PL_regindent*2, "")
c277df42
IZ		 3497 );
3498 REGCP_UNWIND;
5f05dabc 3499 regcppop();
4633a7c4 3500 cc->cur = n - 1;
c277df42 3501 cc->lastloc = lastloc;
4633a7c4 3502 sayNO;
a0d0e21e
LW		 3503 }
3504
3505 /* Prefer scan over next for maximal matching. */
3506
3507 if (n < cc->max) { /* More greed allowed? */
5f05dabc 3508 cp = regcppush(cc->parenfloor);
a0d0e21e
LW		 3509 cc->cur = n;
3510 cc->lastloc = locinput;
c277df42 3511 REGCP_SET;
5f05dabc 3512 if (regmatch(cc->scan)) {
c277df42 3513 regcpblow(cp);
4633a7c4 3514 sayYES;
5f05dabc 3515 }
c277df42 3516 REGCP_UNWIND;
a0d0e21e 3517 regcppop(); /* Restore some previous $<digit>s? */
3280af22 3518 PL_reginput = locinput;
c277df42 3519 DEBUG_r(
c3464db5
DD		 3520 PerlIO_printf(Perl_debug_log,
3521 "%*s failed, try continuation...\n",
3280af22 3522 REPORT_CODE_OFF+PL_regindent*2, "")
c277df42
IZ		 3523 );
3524 }
599cee73
PM		 3525 if (ckWARN(WARN_UNSAFE) && n >= REG_INFTY
3526 && !(PL_reg_flags & RF_warned)) {
3280af22 3527 PL_reg_flags |= RF_warned;
cea2e8a9 3528 Perl_warner(aTHX_ WARN_UNSAFE, "%s limit (%d) exceeded",
cb5d145d
GS		 3529 "Complex regular subexpression recursion",
3530 REG_INFTY - 1);
a0d0e21e
LW		 3531 }
3532
3533 /* Failed deeper matches of scan, so see if this one works. */
3280af22
NIS		 3534 PL_regcc = cc->oldcc;
3535 ln = PL_regcc->cur;
a0d0e21e 3536 if (regmatch(cc->next))
4633a7c4 3537 sayYES;
c277df42 3538 DEBUG_r(
c3464db5 3539 PerlIO_printf(Perl_debug_log, "%*s failed...\n",
3280af22 3540 REPORT_CODE_OFF+PL_regindent*2, "")
c277df42 3541 );
3280af22
NIS		 3542 PL_regcc->cur = ln;
3543 PL_regcc = cc;
4633a7c4 3544 cc->cur = n - 1;
c277df42 3545 cc->lastloc = lastloc;
4633a7c4 3546 sayNO;
a0d0e21e
LW		 3547 }
3548 /* NOT REACHED */
c277df42
IZ		 3549 case BRANCHJ:
3550 next = scan + ARG(scan);
3551 if (next == scan)
3552 next = NULL;
3553 inner = NEXTOPER(NEXTOPER(scan));
3554 goto do_branch;
3555 case BRANCH:
3556 inner = NEXTOPER(scan);
3557 do_branch:
3558 {
3559 CHECKPOINT lastcp;
3560 c1 = OP(scan);
3561 if (OP(next) != c1) /* No choice. */
3562 next = inner; /* Avoid recursion. */
a0d0e21e 3563 else {
3280af22 3564 int lastparen = *PL_reglastparen;
c277df42
IZ		 3565
3566 REGCP_SET;
a0d0e21e 3567 do {
3280af22 3568 PL_reginput = locinput;
c277df42 3569 if (regmatch(inner))
4633a7c4 3570 sayYES;
c277df42 3571 REGCP_UNWIND;
3280af22 3572 for (n = *PL_reglastparen; n > lastparen; n--)
cf93c79d 3573 PL_regendp[n] = -1;
3280af22 3574 *PL_reglastparen = n;
c277df42 3575 scan = next;
a0d0e21e 3576 /*SUPPRESS 560*/
c277df42
IZ		 3577 if (n = (c1 == BRANCH ? NEXT_OFF(next) : ARG(next)))
3578 next += n;
a0d0e21e 3579 else
c277df42 3580 next = NULL;
c277df42
IZ		 3581 inner = NEXTOPER(scan);
3582 if (c1 == BRANCHJ) {
3583 inner = NEXTOPER(inner);
3584 }
3585 } while (scan != NULL && OP(scan) == c1);
4633a7c4 3586 sayNO;
a0d0e21e 3587 /* NOTREACHED */
a687059c 3588 }
a0d0e21e
LW		 3589 }
3590 break;
3591 case MINMOD:
3592 minmod = 1;
3593 break;
c277df42
IZ		 3594 case CURLYM:
3595 {
00db4c45 3596 I32 l = 0;
c277df42
IZ		 3597 CHECKPOINT lastcp;
3598
3599 /* We suppose that the next guy does not need
3600 backtracking: in particular, it is of constant length,
3601 and has no parenths to influence future backrefs. */
3602 ln = ARG1(scan); /* min to match */
3603 n = ARG2(scan); /* max to match */
c277df42
IZ		 3604 paren = scan->flags;
3605 if (paren) {
3280af22
NIS		 3606 if (paren > PL_regsize)
3607 PL_regsize = paren;
3608 if (paren > *PL_reglastparen)
3609 *PL_reglastparen = paren;
c277df42 3610 }
dc45a647 3611 scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
c277df42
IZ		 3612 if (paren)
3613 scan += NEXT_OFF(scan); /* Skip former OPEN. */
3280af22 3614 PL_reginput = locinput;
c277df42
IZ		 3615 if (minmod) {
3616 minmod = 0;
3617 if (ln && regrepeat_hard(scan, ln, &l) < ln)
3618 sayNO;
5f4b28b2 3619 if (ln && l == 0 && n >= ln
c277df42
IZ		 3620 /* In fact, this is tricky. If paren, then the
3621 fact that we did/didnot match may influence
3622 future execution. */
3623 && !(paren && ln == 0))
3624 ln = n;
3280af22 3625 locinput = PL_reginput;
22c35a8c 3626 if (PL_regkind[(U8)OP(next)] == EXACT) {
c277df42
IZ		 3627 c1 = UCHARAT(OPERAND(next) + 1);
3628 if (OP(next) == EXACTF)
22c35a8c 3629 c2 = PL_fold[c1];
c277df42 3630 else if (OP(next) == EXACTFL)
22c35a8c 3631 c2 = PL_fold_locale[c1];
c277df42
IZ		 3632 else
3633 c2 = c1;
a0ed51b3
LW		 3634 }
3635 else
c277df42
IZ		 3636 c1 = c2 = -1000;
3637 REGCP_SET;
5f4b28b2 3638 /* This may be improved if l == 0. */
c277df42
IZ		 3639 while (n >= ln || (n == REG_INFTY && ln > 0 && l)) { /* ln overflow ? */
3640 /* If it could work, try it. */
3641 if (c1 == -1000 ||
3280af22
NIS		 3642 UCHARAT(PL_reginput) == c1 ||
3643 UCHARAT(PL_reginput) == c2)
c277df42
IZ		 3644 {
3645 if (paren) {
3646 if (n) {
cf93c79d
IZ		 3647 PL_regstartp[paren] =
3648 HOPc(PL_reginput, -l) - PL_bostr;
3649 PL_regendp[paren] = PL_reginput - PL_bostr;
a0ed51b3
LW		 3650 }
3651 else
cf93c79d 3652 PL_regendp[paren] = -1;
c277df42
IZ		 3653 }
3654 if (regmatch(next))
3655 sayYES;
3656 REGCP_UNWIND;
3657 }
3658 /* Couldn't or didn't -- move forward. */
3280af22 3659 PL_reginput = locinput;
c277df42
IZ		 3660 if (regrepeat_hard(scan, 1, &l)) {
3661 ln++;
3280af22 3662 locinput = PL_reginput;
c277df42
IZ		 3663 }
3664 else
3665 sayNO;
3666 }
a0ed51b3
LW		 3667 }
3668 else {
c277df42
IZ		 3669 n = regrepeat_hard(scan, n, &l);
3670 if (n != 0 && l == 0
3671 /* In fact, this is tricky. If paren, then the
3672 fact that we did/didnot match may influence
3673 future execution. */
3674 && !(paren && ln == 0))
3675 ln = n;
3280af22 3676 locinput = PL_reginput;
c277df42 3677 DEBUG_r(
5c0ca799
GS		 3678 PerlIO_printf(Perl_debug_log,
3679 "%*s matched %ld times, len=%ld...\n",
3280af22 3680 REPORT_CODE_OFF+PL_regindent*2, "", n, l)
c277df42
IZ		 3681 );
3682 if (n >= ln) {
22c35a8c 3683 if (PL_regkind[(U8)OP(next)] == EXACT) {
c277df42
IZ		 3684 c1 = UCHARAT(OPERAND(next) + 1);
3685 if (OP(next) == EXACTF)
22c35a8c 3686 c2 = PL_fold[c1];
c277df42 3687 else if (OP(next) == EXACTFL)
22c35a8c 3688 c2 = PL_fold_locale[c1];
c277df42
IZ		 3689 else
3690 c2 = c1;
a0ed51b3
LW		 3691 }
3692 else
c277df42
IZ		 3693 c1 = c2 = -1000;
3694 }
3695 REGCP_SET;
3696 while (n >= ln) {
3697 /* If it could work, try it. */
3698 if (c1 == -1000 ||
3280af22
NIS		 3699 UCHARAT(PL_reginput) == c1 ||
3700 UCHARAT(PL_reginput) == c2)
a0ed51b3
LW		 3701 {
3702 DEBUG_r(
c3464db5
DD		 3703 PerlIO_printf(Perl_debug_log,
3704 "%*s trying tail with n=%ld...\n",
3280af22 3705 REPORT_CODE_OFF+PL_regindent*2, "", n)
a0ed51b3
LW		 3706 );
3707 if (paren) {
3708 if (n) {
cf93c79d
IZ		 3709 PL_regstartp[paren] = HOPc(PL_reginput, -l) - PL_bostr;
3710 PL_regendp[paren] = PL_reginput - PL_bostr;
c277df42 3711 }
a0ed51b3 3712 else
cf93c79d 3713 PL_regendp[paren] = -1;
c277df42 3714 }
a0ed51b3
LW		 3715 if (regmatch(next))
3716 sayYES;
3717 REGCP_UNWIND;
3718 }
c277df42
IZ		 3719 /* Couldn't or didn't -- back up. */
3720 n--;
dfe13c55 3721 locinput = HOPc(locinput, -l);
3280af22 3722 PL_reginput = locinput;
c277df42
IZ		 3723 }
3724 }
3725 sayNO;
3726 break;
3727 }
3728 case CURLYN:
3729 paren = scan->flags; /* Which paren to set */
3280af22
NIS		 3730 if (paren > PL_regsize)
3731 PL_regsize = paren;
3732 if (paren > *PL_reglastparen)
3733 *PL_reglastparen = paren;
c277df42
IZ		 3734 ln = ARG1(scan); /* min to match */
3735 n = ARG2(scan); /* max to match */
dc45a647 3736 scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE);
c277df42 3737 goto repeat;
a0d0e21e 3738 case CURLY:
c277df42 3739 paren = 0;
a0d0e21e
LW		 3740 ln = ARG1(scan); /* min to match */
3741 n = ARG2(scan); /* max to match */
dc45a647 3742 scan = NEXTOPER(scan) + NODE_STEP_REGNODE;
a0d0e21e
LW		 3743 goto repeat;
3744 case STAR:
3745 ln = 0;
c277df42 3746 n = REG_INFTY;
a0d0e21e 3747 scan = NEXTOPER(scan);
c277df42 3748 paren = 0;
a0d0e21e
LW		 3749 goto repeat;
3750 case PLUS:
c277df42
IZ		 3751 ln = 1;
3752 n = REG_INFTY;
3753 scan = NEXTOPER(scan);
3754 paren = 0;
3755 repeat:
a0d0e21e
LW		 3756 /*
3757 * Lookahead to avoid useless match attempts
3758 * when we know what character comes next.
3759 */
22c35a8c 3760 if (PL_regkind[(U8)OP(next)] == EXACT) {
bbce6d69 3761 c1 = UCHARAT(OPERAND(next) + 1);
3762 if (OP(next) == EXACTF)
22c35a8c 3763 c2 = PL_fold[c1];
bbce6d69 3764 else if (OP(next) == EXACTFL)
22c35a8c 3765 c2 = PL_fold_locale[c1];
bbce6d69 3766 else
3767 c2 = c1;
3768 }
a0d0e21e 3769 else
bbce6d69 3770 c1 = c2 = -1000;
3280af22 3771 PL_reginput = locinput;
a0d0e21e 3772 if (minmod) {
c277df42 3773 CHECKPOINT lastcp;
a0d0e21e
LW		 3774 minmod = 0;
3775 if (ln && regrepeat(scan, ln) < ln)
4633a7c4 3776 sayNO;
a0ed51b3 3777 locinput = PL_reginput;
c277df42 3778 REGCP_SET;
0fe9bf95
IZ		 3779 if (c1 != -1000) {
3780 char *e = locinput + n - ln; /* Should not check after this */
3781 char *old = locinput;
3782
3783 if (e >= PL_regeol || (n == REG_INFTY))
3784 e = PL_regeol - 1;
3785 while (1) {
3786 /* Find place 'next' could work */
3787 if (c1 == c2) {
3788 while (locinput <= e && *locinput != c1)
3789 locinput++;
3790 } else {
3791 while (locinput <= e
3792 && *locinput != c1
3793 && *locinput != c2)
3794 locinput++;
3795 }
3796 if (locinput > e)
3797 sayNO;
3798 /* PL_reginput == old now */
3799 if (locinput != old) {
3800 ln = 1; /* Did some */
3801 if (regrepeat(scan, locinput - old) <
3802 locinput - old)
3803 sayNO;
3804 }
3805 /* PL_reginput == locinput now */
3806 if (paren) {
3807 if (ln) {
cf93c79d
IZ		 3808 PL_regstartp[paren] = HOPc(locinput, -1) - PL_bostr;
3809 PL_regendp[paren] = locinput - PL_bostr;
0fe9bf95
IZ		 3810 }
3811 else
cf93c79d 3812 PL_regendp[paren] = -1;
0fe9bf95
IZ		 3813 }
3814 if (regmatch(next))
3815 sayYES;
3816 PL_reginput = locinput; /* Could be reset... */
3817 REGCP_UNWIND;
3818 /* Couldn't or didn't -- move forward. */
3819 old = locinput++;
3820 }
3821 }
3822 else
c277df42 3823 while (n >= ln || (n == REG_INFTY && ln > 0)) { /* ln overflow ? */
a0d0e21e 3824 /* If it could work, try it. */
bbce6d69 3825 if (c1 == -1000 ||
3280af22
NIS		 3826 UCHARAT(PL_reginput) == c1 ||
3827 UCHARAT(PL_reginput) == c2)
bbce6d69 3828 {
c277df42
IZ		 3829 if (paren) {
3830 if (n) {
cf93c79d
IZ		 3831 PL_regstartp[paren] = HOPc(PL_reginput, -1) - PL_bostr;
3832 PL_regendp[paren] = PL_reginput - PL_bostr;
a0ed51b3
LW		 3833 }
3834 else
cf93c79d 3835 PL_regendp[paren] = -1;
c277df42 3836 }
a0d0e21e 3837 if (regmatch(next))
4633a7c4 3838 sayYES;
c277df42 3839 REGCP_UNWIND;
bbce6d69 3840 }
c277df42 3841 /* Couldn't or didn't -- move forward. */
a0ed51b3 3842 PL_reginput = locinput;
a0d0e21e
LW		 3843 if (regrepeat(scan, 1)) {
3844 ln++;
a0ed51b3
LW		 3845 locinput = PL_reginput;
3846 }
3847 else
4633a7c4 3848 sayNO;
a0d0e21e
LW		 3849 }
3850 }
3851 else {
c277df42 3852 CHECKPOINT lastcp;
a0d0e21e 3853 n = regrepeat(scan, n);
a0ed51b3 3854 locinput = PL_reginput;
22c35a8c 3855 if (ln < n && PL_regkind[(U8)OP(next)] == EOL &&
3280af22 3856 (!PL_multiline || OP(next) == SEOL))
a0d0e21e 3857 ln = n; /* why back off? */
c277df42
IZ		 3858 REGCP_SET;
3859 if (paren) {
3860 while (n >= ln) {
3861 /* If it could work, try it. */
3862 if (c1 == -1000 ||
3280af22
NIS		 3863 UCHARAT(PL_reginput) == c1 ||
3864 UCHARAT(PL_reginput) == c2)
c277df42
IZ		 3865 {
3866 if (paren && n) {
3867 if (n) {
cf93c79d
IZ		 3868 PL_regstartp[paren] = HOPc(PL_reginput, -1) - PL_bostr;
3869 PL_regendp[paren] = PL_reginput - PL_bostr;
a0ed51b3
LW		 3870 }
3871 else
cf93c79d 3872 PL_regendp[paren] = -1;
c277df42
IZ		 3873 }
3874 if (regmatch(next))
3875 sayYES;
3876 REGCP_UNWIND;
3877 }
3878 /* Couldn't or didn't -- back up. */
3879 n--;
dfe13c55 3880 PL_reginput = locinput = HOPc(locinput, -1);
c277df42 3881 }
a0ed51b3
LW		 3882 }
3883 else {
c277df42
IZ		 3884 while (n >= ln) {
3885 /* If it could work, try it. */
3886 if (c1 == -1000 ||
3280af22
NIS		 3887 UCHARAT(PL_reginput) == c1 ||
3888 UCHARAT(PL_reginput) == c2)
c277df42
IZ		 3889 {
3890 if (regmatch(next))
3891 sayYES;
3892 REGCP_UNWIND;
3893 }
3894 /* Couldn't or didn't -- back up. */
3895 n--;
dfe13c55 3896 PL_reginput = locinput = HOPc(locinput, -1);
bbce6d69 3897 }
a0d0e21e
LW		 3898 }
3899 }
4633a7c4 3900 sayNO;
c277df42 3901 break;
a0d0e21e 3902 case END:
0f5d15d6
IZ		 3903 if (PL_reg_call_cc) {
3904 re_cc_state *cur_call_cc = PL_reg_call_cc;
3905 CURCUR *cctmp = PL_regcc;
3906 regexp *re = PL_reg_re;
3907 CHECKPOINT cp, lastcp;
3908
3909 cp = regcppush(0); /* Save *all* the positions. */
3910 REGCP_SET;
3911 regcp_set_to(PL_reg_call_cc->ss); /* Restore parens of
3912 the caller. */
3913 PL_reginput = locinput; /* Make position available to
3914 the callcc. */
3915 cache_re(PL_reg_call_cc->re);
3916 PL_regcc = PL_reg_call_cc->cc;
3917 PL_reg_call_cc = PL_reg_call_cc->prev;
3918 if (regmatch(cur_call_cc->node)) {
3919 PL_reg_call_cc = cur_call_cc;
3920 regcpblow(cp);
3921 sayYES;
3922 }
3923 REGCP_UNWIND;
3924 regcppop();
3925 PL_reg_call_cc = cur_call_cc;
3926 PL_regcc = cctmp;
3927 PL_reg_re = re;
3928 cache_re(re);
3929
3930 DEBUG_r(
3931 PerlIO_printf(Perl_debug_log,
3932 "%*s continuation failed...\n",
3933 REPORT_CODE_OFF+PL_regindent*2, "")
3934 );
3935 sayNO;
3936 }
3280af22 3937 if (locinput < PL_regtill)
7e5428c5
IZ		 3938 sayNO; /* Cannot match: too short. */
3939 /* Fall through */
3940 case SUCCEED:
3280af22 3941 PL_reginput = locinput; /* put where regtry can find it */
4633a7c4 3942 sayYES; /* Success! */
c277df42
IZ		 3943 case SUSPEND:
3944 n = 1;
9fe1d20c 3945 PL_reginput = locinput;
c277df42 3946 goto do_ifmatch;
a0d0e21e 3947 case UNLESSM:
c277df42 3948 n = 0;
a0ed51b3 3949 if (scan->flags) {
0fe9bf95
IZ		 3950 if (UTF) { /* XXXX This is absolutely
3951 broken, we read before
3952 start of string. */
3953 s = HOPMAYBEc(locinput, -scan->flags);
3954 if (!s)
3955 goto say_yes;
3956 PL_reginput = s;
3957 }
3958 else {
3959 if (locinput < PL_bostr + scan->flags)
3960 goto say_yes;
3961 PL_reginput = locinput - scan->flags;
3962 goto do_ifmatch;
3963 }
a0ed51b3
LW		 3964 }
3965 else
3966 PL_reginput = locinput;
c277df42
IZ		 3967 goto do_ifmatch;
3968 case IFMATCH:
3969 n = 1;
a0ed51b3 3970 if (scan->flags) {
0fe9bf95
IZ		 3971 if (UTF) { /* XXXX This is absolutely
3972 broken, we read before
3973 start of string. */
3974 s = HOPMAYBEc(locinput, -scan->flags);
3975 if (!s || s < PL_bostr)
3976 goto say_no;
3977 PL_reginput = s;
3978 }
3979 else {
3980 if (locinput < PL_bostr + scan->flags)
3981 goto say_no;
3982 PL_reginput = locinput - scan->flags;
3983 goto do_ifmatch;
3984 }
a0ed51b3
LW		 3985 }
3986 else
3987 PL_reginput = locinput;
3988
c277df42 3989 do_ifmatch:
c277df42
IZ		 3990 inner = NEXTOPER(NEXTOPER(scan));
3991 if (regmatch(inner) != n) {
3992 say_no:
3993 if (logical) {
3994 logical = 0;
3995 sw = 0;
3996 goto do_longjump;
a0ed51b3
LW		 3997 }
3998 else
c277df42
IZ		 3999 sayNO;
4000 }
4001 say_yes:
4002 if (logical) {
4003 logical = 0;
4004 sw = 1;
4005 }
fe44a5e8 4006 if (OP(scan) == SUSPEND) {
3280af22 4007 locinput = PL_reginput;
565764a8 4008 nextchr = UCHARAT(locinput);
fe44a5e8 4009 }
c277df42
IZ		 4010 /* FALL THROUGH. */
4011 case LONGJMP:
4012 do_longjump:
4013 next = scan + ARG(scan);
4014 if (next == scan)
4015 next = NULL;
a0d0e21e
LW		 4016 break;
4017 default:
c030ccd9 4018 PerlIO_printf(PerlIO_stderr(), "%lx %d\n",
c277df42 4019 (unsigned long)scan, OP(scan));
cea2e8a9 4020 Perl_croak(aTHX_ "regexp memory corruption");
a687059c 4021 }
a0d0e21e
LW		 4022 scan = next;
4023 }
a687059c 4024
a0d0e21e
LW		 4025 /*
4026 * We get here only if there's trouble -- normally "case END" is
4027 * the terminating point.
4028 */
cea2e8a9 4029 Perl_croak(aTHX_ "corrupted regexp pointers");
a0d0e21e 4030 /*NOTREACHED*/
4633a7c4
LW		 4031 sayNO;
4032
4033yes:
4034#ifdef DEBUGGING
3280af22 4035 PL_regindent--;
4633a7c4
LW		 4036#endif
4037 return 1;
4038
4039no:
4040#ifdef DEBUGGING
3280af22 4041 PL_regindent--;
4633a7c4 4042#endif
a0d0e21e 4043 return 0;
a687059c
LW		 4044}
4045
4046/*
4047 - regrepeat - repeatedly match something simple, report how many
4048 */
4049/*
4050 * [This routine now assumes that it will only match on things of length 1.
4051 * That was true before, but now we assume scan - reginput is the count,
a0ed51b3 4052 * rather than incrementing count on every character. [Er, except utf8.]]
a687059c 4053 */
76e3520e 4054STATIC I32
cea2e8a9 4055S_regrepeat(pTHX_ regnode *p, I32 max)
a687059c 4056{
5c0ca799 4057 dTHR;
a0d0e21e
LW		 4058 register char *scan;
4059 register char *opnd;
4060 register I32 c;
3280af22 4061 register char *loceol = PL_regeol;
a0ed51b3 4062 register I32 hardcount = 0;
a0d0e21e 4063
3280af22 4064 scan = PL_reginput;
c277df42 4065 if (max != REG_INFTY && max < loceol - scan)
a0d0e21e 4066 loceol = scan + max;
161b471a 4067 opnd = (char *) OPERAND(p);
a0d0e21e 4068 switch (OP(p)) {
22c35a8c 4069 case REG_ANY:
a0d0e21e
LW		 4070 while (scan < loceol && *scan != '\n')
4071 scan++;
4072 break;
4073 case SANY:
4074 scan = loceol;
4075 break;
a0ed51b3
LW		 4076 case ANYUTF8:
4077 loceol = PL_regeol;
4078 while (scan < loceol && *scan != '\n') {