Commit | Line | Data |
a0d0e21e |
1 | /* regexec.c |
2 | */ |
3 | |
4 | /* |
5 | * "One Ring to rule them all, One Ring to find them..." |
6 | */ |
7 | |
a687059c |
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 |
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 |
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 |
29 | # define DEBUGGING |
30 | # endif |
31 | #endif |
32 | |
33 | #ifdef PERL_IN_XSUB_RE |
d06ea78c |
34 | /* We *really* need to overwrite these symbols: */ |
56953603 |
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 |
39 | /* *These* symbols are masked to allow static link. */ |
40 | # define Perl_pregexec my_pregexec |
d88dccdf |
41 | # define Perl_reginitcolors my_reginitcolors |
c5be433b |
42 | |
43 | # define PERL_NO_GET_CONTEXT |
56953603 |
44 | #endif |
45 | |
f0fcb552 |
46 | /*SUPPRESS 112*/ |
a687059c |
47 | /* |
e50aee73 |
48 | * pregcomp and pregexec -- regsub and regerror are not used in perl |
a687059c |
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 |
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 |
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 |
82 | #ifdef PERL_IN_XSUB_RE |
83 | # if defined(PERL_CAPI) || defined(PERL_OBJECT) |
84 | # include "XSUB.h" |
85 | # endif |
86 | #endif |
87 | |
a687059c |
88 | #include "regcomp.h" |
89 | |
c277df42 |
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 |
93 | #define RF_utf8 8 /* String contains multibyte chars? */ |
94 | |
95 | #define UTF (PL_reg_flags & RF_utf8) |
ce862d02 |
96 | |
97 | #define RS_init 1 /* eval environment created */ |
98 | #define RS_set 2 /* replsv value is set */ |
c277df42 |
99 | |
a687059c |
100 | #ifndef STATIC |
101 | #define STATIC static |
102 | #endif |
103 | |
c277df42 |
104 | /* |
105 | * Forwards. |
106 | */ |
107 | |
b8c5462f |
108 | #define REGINCLASS(p,c) (ANYOF_FLAGS(p) ? reginclass(p,c) : ANYOF_BITMAP_TEST(p,c)) |
a0ed51b3 |
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 |
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 |
121 | static void restore_pos(pTHXo_ void *arg); |
122 | |
123 | |
76e3520e |
124 | STATIC CHECKPOINT |
cea2e8a9 |
125 | S_regcppush(pTHX_ I32 parenfloor) |
a0d0e21e |
126 | { |
11343788 |
127 | dTHR; |
3280af22 |
128 | int retval = PL_savestack_ix; |
129 | int i = (PL_regsize - parenfloor) * 4; |
a0d0e21e |
130 | int p; |
131 | |
132 | SSCHECK(i + 5); |
3280af22 |
133 | for (p = PL_regsize; p > parenfloor; p--) { |
cf93c79d |
134 | SSPUSHINT(PL_regendp[p]); |
135 | SSPUSHINT(PL_regstartp[p]); |
3280af22 |
136 | SSPUSHPTR(PL_reg_start_tmp[p]); |
a0d0e21e |
137 | SSPUSHINT(p); |
138 | } |
3280af22 |
139 | SSPUSHINT(PL_regsize); |
140 | SSPUSHINT(*PL_reglastparen); |
141 | SSPUSHPTR(PL_reginput); |
a0d0e21e |
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 |
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 |
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 |
157 | STATIC char * |
cea2e8a9 |
158 | S_regcppop(pTHX) |
a0d0e21e |
159 | { |
11343788 |
160 | dTHR; |
a0d0e21e |
161 | I32 i = SSPOPINT; |
162 | U32 paren = 0; |
163 | char *input; |
cf93c79d |
164 | I32 tmps; |
a0d0e21e |
165 | assert(i == SAVEt_REGCONTEXT); |
166 | i = SSPOPINT; |
167 | input = (char *) SSPOPPTR; |
3280af22 |
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 |
173 | PL_regstartp[paren] = SSPOPINT; |
174 | tmps = SSPOPINT; |
3280af22 |
175 | if (paren <= *PL_reglastparen) |
176 | PL_regendp[paren] = tmps; |
c277df42 |
177 | DEBUG_r( |
c3464db5 |
178 | PerlIO_printf(Perl_debug_log, |
179 | " restoring \\%d to %d(%d)..%d%s\n", |
cf93c79d |
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 |
188 | PerlIO_printf(Perl_debug_log, |
189 | " restoring \\%d..\\%d to undef\n", |
3280af22 |
190 | *PL_reglastparen + 1, PL_regnpar); |
c277df42 |
191 | } |
192 | ); |
3280af22 |
193 | for (paren = *PL_reglastparen + 1; paren <= PL_regnpar; paren++) { |
194 | if (paren > PL_regsize) |
cf93c79d |
195 | PL_regstartp[paren] = -1; |
196 | PL_regendp[paren] = -1; |
a0d0e21e |
197 | } |
198 | return input; |
199 | } |
200 | |
0f5d15d6 |
201 | STATIC char * |
cea2e8a9 |
202 | S_regcp_set_to(pTHX_ I32 ss) |
0f5d15d6 |
203 | { |
46124e9e |
204 | dTHR; |
0f5d15d6 |
205 | I32 tmp = PL_savestack_ix; |
206 | |
207 | PL_savestack_ix = ss; |
208 | regcppop(); |
209 | PL_savestack_ix = tmp; |
942e002e |
210 | return Nullch; |
0f5d15d6 |
211 | } |
212 | |
213 | typedef 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 |
226 | */ |
227 | |
228 | /* |
c277df42 |
229 | - pregexec - match a regexp against a string |
a687059c |
230 | */ |
c277df42 |
231 | I32 |
864dbfa3 |
232 | Perl_pregexec(pTHX_ register regexp *prog, char *stringarg, register char *strend, |
c3464db5 |
233 | char *strbeg, I32 minend, SV *screamer, U32 nosave) |
c277df42 |
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 |
243 | |
244 | STATIC void |
cea2e8a9 |
245 | S_cache_re(pTHX_ regexp *prog) |
0f5d15d6 |
246 | { |
46124e9e |
247 | dTHR; |
0f5d15d6 |
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 |
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 | |
2c2d71f5 |
273 | /* If SCREAM, then SvPVX(sv) should be compatible with strpos and strend. |
cad2e5aa |
274 | Otherwise, only SvCUR(sv) is used to get strbeg. */ |
275 | |
276 | /* XXXX We assume that strpos is strbeg unless sv. */ |
277 | |
2c2d71f5 |
278 | /* A failure to find a constant substring means that there is no need to make |
279 | an expensive call to REx engine, thus we celebrate a failure. Similarly, |
280 | finding a substring too deep into the string means that less calls to |
30944b6d |
281 | regtry() should be needed. |
282 | |
283 | REx compiler's optimizer found 4 possible hints: |
284 | a) Anchored substring; |
285 | b) Fixed substring; |
286 | c) Whether we are anchored (beginning-of-line or \G); |
287 | d) First node (of those at offset 0) which may distingush positions; |
288 | We use 'a', 'b', multiline-part of 'c', and try to find a position in the |
289 | string which does not contradict any of them. |
290 | */ |
2c2d71f5 |
291 | |
cad2e5aa |
292 | char * |
293 | Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, |
294 | char *strend, U32 flags, re_scream_pos_data *data) |
295 | { |
2c2d71f5 |
296 | register I32 start_shift; |
cad2e5aa |
297 | /* Should be nonnegative! */ |
2c2d71f5 |
298 | register I32 end_shift; |
299 | register char *s; |
300 | register SV *check; |
cad2e5aa |
301 | char *t; |
302 | I32 ml_anch; |
2c2d71f5 |
303 | char *tmp; |
304 | register char *other_last = Nullch; |
30944b6d |
305 | #ifdef DEBUGGING |
306 | char *i_strpos = strpos; |
307 | #endif |
cad2e5aa |
308 | |
309 | DEBUG_r( if (!PL_colorset) reginitcolors() ); |
310 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
2c2d71f5 |
311 | "%sGuessing start of match, REx%s `%s%.60s%s%s' against `%s%.*s%s%s'...\n", |
cad2e5aa |
312 | PL_colors[4],PL_colors[5],PL_colors[0], |
313 | prog->precomp, |
314 | PL_colors[1], |
315 | (strlen(prog->precomp) > 60 ? "..." : ""), |
316 | PL_colors[0], |
317 | (strend - strpos > 60 ? 60 : strend - strpos), |
318 | strpos, PL_colors[1], |
319 | (strend - strpos > 60 ? "..." : "")) |
320 | ); |
321 | |
2c2d71f5 |
322 | if (prog->minlen > strend - strpos) { |
323 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String too short...\n")); |
cad2e5aa |
324 | goto fail; |
2c2d71f5 |
325 | } |
326 | if (prog->reganch & ROPT_ANCH) { /* Match at beg-of-str or after \n */ |
cad2e5aa |
327 | ml_anch = !( (prog->reganch & ROPT_ANCH_SINGLE) |
328 | || ( (prog->reganch & ROPT_ANCH_BOL) |
2c2d71f5 |
329 | && !PL_multiline ) ); /* Check after \n? */ |
cad2e5aa |
330 | |
331 | if ((prog->check_offset_min == prog->check_offset_max) && !ml_anch) { |
2c2d71f5 |
332 | /* Substring at constant offset from beg-of-str... */ |
cad2e5aa |
333 | I32 slen; |
334 | |
335 | if ( !(prog->reganch & ROPT_ANCH_GPOS) /* Checked by the caller */ |
2c2d71f5 |
336 | && (sv && (strpos + SvCUR(sv) != strend)) ) { |
337 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Not at start...\n")); |
cad2e5aa |
338 | goto fail; |
2c2d71f5 |
339 | } |
adac82c7 |
340 | PL_regeol = strend; /* Used in HOP() */ |
2c2d71f5 |
341 | s = HOPc(strpos, prog->check_offset_min); |
cad2e5aa |
342 | if (SvTAIL(prog->check_substr)) { |
343 | slen = SvCUR(prog->check_substr); /* >= 1 */ |
344 | |
2c2d71f5 |
345 | if ( strend - s > slen || strend - s < slen - 1 |
346 | || (strend - s == slen && strend[-1] != '\n')) { |
347 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String too long...\n")); |
348 | goto fail_finish; |
cad2e5aa |
349 | } |
350 | /* Now should match s[0..slen-2] */ |
351 | slen--; |
352 | if (slen && (*SvPVX(prog->check_substr) != *s |
353 | || (slen > 1 |
2c2d71f5 |
354 | && memNE(SvPVX(prog->check_substr), s, slen)))) { |
355 | report_neq: |
356 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String not equal...\n")); |
357 | goto fail_finish; |
358 | } |
cad2e5aa |
359 | } |
360 | else if (*SvPVX(prog->check_substr) != *s |
361 | || ((slen = SvCUR(prog->check_substr)) > 1 |
362 | && memNE(SvPVX(prog->check_substr), s, slen))) |
2c2d71f5 |
363 | goto report_neq; |
364 | goto success_at_start; |
cad2e5aa |
365 | } |
2c2d71f5 |
366 | /* Match is anchored, but substr is not anchored wrt beg-of-str. */ |
cad2e5aa |
367 | s = strpos; |
2c2d71f5 |
368 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
369 | /* Should be nonnegative! */ |
370 | end_shift = prog->minlen - start_shift - |
371 | CHR_SVLEN(prog->check_substr) + (SvTAIL(prog->check_substr) != 0); |
372 | if (!ml_anch) { |
373 | I32 end = prog->check_offset_max + CHR_SVLEN(prog->check_substr) |
374 | - (SvTAIL(prog->check_substr) != 0); |
375 | I32 eshift = strend - s - end; |
376 | |
377 | if (end_shift < eshift) |
378 | end_shift = eshift; |
379 | } |
cad2e5aa |
380 | } |
2c2d71f5 |
381 | else { /* Can match at random position */ |
cad2e5aa |
382 | ml_anch = 0; |
383 | s = strpos; |
2c2d71f5 |
384 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
385 | /* Should be nonnegative! */ |
386 | end_shift = prog->minlen - start_shift - |
387 | CHR_SVLEN(prog->check_substr) + (SvTAIL(prog->check_substr) != 0); |
cad2e5aa |
388 | } |
389 | |
2c2d71f5 |
390 | #ifdef DEBUGGING /* 7/99: reports of failure (with the older version) */ |
0033605d |
391 | if (end_shift < 0) |
6bbae5e6 |
392 | Perl_croak(aTHX_ "panic: end_shift"); |
2c2d71f5 |
393 | #endif |
394 | |
395 | check = prog->check_substr; |
396 | restart: |
397 | /* Find a possible match in the region s..strend by looking for |
398 | the "check" substring in the region corrected by start/end_shift. */ |
cad2e5aa |
399 | if (flags & REXEC_SCREAM) { |
cad2e5aa |
400 | char *strbeg = SvPVX(sv); /* XXXX Assume PV_force() on SCREAM! */ |
401 | I32 p = -1; /* Internal iterator of scream. */ |
402 | I32 *pp = data ? data->scream_pos : &p; |
403 | |
2c2d71f5 |
404 | if (PL_screamfirst[BmRARE(check)] >= 0 |
405 | || ( BmRARE(check) == '\n' |
406 | && (BmPREVIOUS(check) == SvCUR(check) - 1) |
407 | && SvTAIL(check) )) |
408 | s = screaminstr(sv, check, |
409 | start_shift + (s - strbeg), end_shift, pp, 0); |
cad2e5aa |
410 | else |
2c2d71f5 |
411 | goto fail_finish; |
cad2e5aa |
412 | if (data) |
413 | *data->scream_olds = s; |
414 | } |
415 | else |
416 | s = fbm_instr((unsigned char*)s + start_shift, |
417 | (unsigned char*)strend - end_shift, |
2c2d71f5 |
418 | check, PL_multiline ? FBMrf_MULTILINE : 0); |
cad2e5aa |
419 | |
420 | /* Update the count-of-usability, remove useless subpatterns, |
421 | unshift s. */ |
2c2d71f5 |
422 | |
423 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%s %s substr `%s%.*s%s'%s%s", |
424 | (s ? "Found" : "Did not find"), |
425 | ((check == prog->anchored_substr) ? "anchored" : "floating"), |
426 | PL_colors[0], |
427 | SvCUR(check) - (SvTAIL(check)!=0), SvPVX(check), |
428 | PL_colors[1], (SvTAIL(check) ? "$" : ""), |
429 | (s ? " at offset " : "...\n") ) ); |
430 | |
431 | if (!s) |
432 | goto fail_finish; |
433 | |
434 | /* Finish the diagnostic message */ |
30944b6d |
435 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) ); |
2c2d71f5 |
436 | |
437 | /* Got a candidate. Check MBOL anchoring, and the *other* substr. |
438 | Start with the other substr. |
439 | XXXX no SCREAM optimization yet - and a very coarse implementation |
440 | XXXX /ttx+/ results in anchored=`ttx', floating=`x'. floating will |
441 | *always* match. Probably should be marked during compile... |
442 | Probably it is right to do no SCREAM here... |
443 | */ |
444 | |
445 | if (prog->float_substr && prog->anchored_substr) { |
30944b6d |
446 | /* Take into account the "other" substring. */ |
2c2d71f5 |
447 | /* XXXX May be hopelessly wrong for UTF... */ |
448 | if (!other_last) |
449 | other_last = strpos - 1; |
450 | if (check == prog->float_substr) { |
30944b6d |
451 | do_other_anchored: |
452 | { |
2c2d71f5 |
453 | char *last = s - start_shift, *last1, *last2; |
454 | char *s1 = s; |
455 | |
456 | tmp = PL_bostr; |
457 | t = s - prog->check_offset_max; |
458 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ |
459 | && (!(prog->reganch & ROPT_UTF8) |
460 | || (PL_bostr = strpos, /* Used in regcopmaybe() */ |
461 | (t = reghopmaybe_c(s, -(prog->check_offset_max))) |
462 | && t > strpos))) |
30944b6d |
463 | /* EMPTY */; |
2c2d71f5 |
464 | else |
465 | t = strpos; |
466 | t += prog->anchored_offset; |
467 | if (t <= other_last) |
468 | t = other_last + 1; |
469 | PL_bostr = tmp; |
470 | last2 = last1 = strend - prog->minlen; |
471 | if (last < last1) |
472 | last1 = last; |
473 | /* XXXX It is not documented what units *_offsets are in. Assume bytes. */ |
474 | /* On end-of-str: see comment below. */ |
475 | s = fbm_instr((unsigned char*)t, |
476 | (unsigned char*)last1 + prog->anchored_offset |
477 | + SvCUR(prog->anchored_substr) |
478 | - (SvTAIL(prog->anchored_substr)!=0), |
479 | prog->anchored_substr, PL_multiline ? FBMrf_MULTILINE : 0); |
480 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%s anchored substr `%s%.*s%s'%s", |
481 | (s ? "Found" : "Contradicts"), |
482 | PL_colors[0], |
483 | SvCUR(prog->anchored_substr) |
484 | - (SvTAIL(prog->anchored_substr)!=0), |
485 | SvPVX(prog->anchored_substr), |
486 | PL_colors[1], (SvTAIL(prog->anchored_substr) ? "$" : ""))); |
487 | if (!s) { |
488 | if (last1 >= last2) { |
489 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
490 | ", giving up...\n")); |
491 | goto fail_finish; |
492 | } |
493 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
494 | ", trying floating at offset %ld...\n", |
30944b6d |
495 | (long)(s1 + 1 - i_strpos))); |
2c2d71f5 |
496 | PL_regeol = strend; /* Used in HOP() */ |
497 | other_last = last1 + prog->anchored_offset; |
498 | s = HOPc(last, 1); |
499 | goto restart; |
500 | } |
501 | else { |
502 | DEBUG_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", |
30944b6d |
503 | (long)(s - i_strpos))); |
2c2d71f5 |
504 | t = s - prog->anchored_offset; |
505 | other_last = s - 1; |
30944b6d |
506 | s = s1; |
2c2d71f5 |
507 | if (t == strpos) |
508 | goto try_at_start; |
2c2d71f5 |
509 | goto try_at_offset; |
510 | } |
30944b6d |
511 | } |
2c2d71f5 |
512 | } |
513 | else { /* Take into account the floating substring. */ |
514 | char *last, *last1; |
515 | char *s1 = s; |
516 | |
517 | t = s - start_shift; |
518 | last1 = last = strend - prog->minlen + prog->float_min_offset; |
519 | if (last - t > prog->float_max_offset) |
520 | last = t + prog->float_max_offset; |
521 | s = t + prog->float_min_offset; |
522 | if (s <= other_last) |
523 | s = other_last + 1; |
524 | /* XXXX It is not documented what units *_offsets are in. Assume bytes. */ |
525 | /* fbm_instr() takes into account exact value of end-of-str |
526 | if the check is SvTAIL(ed). Since false positives are OK, |
527 | and end-of-str is not later than strend we are OK. */ |
528 | s = fbm_instr((unsigned char*)s, |
529 | (unsigned char*)last + SvCUR(prog->float_substr) |
530 | - (SvTAIL(prog->float_substr)!=0), |
531 | prog->float_substr, PL_multiline ? FBMrf_MULTILINE : 0); |
532 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%s floating substr `%s%.*s%s'%s", |
533 | (s ? "Found" : "Contradicts"), |
534 | PL_colors[0], |
535 | SvCUR(prog->float_substr) |
536 | - (SvTAIL(prog->float_substr)!=0), |
537 | SvPVX(prog->float_substr), |
538 | PL_colors[1], (SvTAIL(prog->float_substr) ? "$" : ""))); |
539 | if (!s) { |
540 | if (last1 == last) { |
541 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
542 | ", giving up...\n")); |
543 | goto fail_finish; |
544 | } |
545 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
546 | ", trying anchored starting at offset %ld...\n", |
30944b6d |
547 | (long)(s1 + 1 - i_strpos))); |
2c2d71f5 |
548 | other_last = last; |
549 | PL_regeol = strend; /* Used in HOP() */ |
550 | s = HOPc(t, 1); |
551 | goto restart; |
552 | } |
553 | else { |
554 | DEBUG_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", |
30944b6d |
555 | (long)(s - i_strpos))); |
2c2d71f5 |
556 | other_last = s - 1; |
30944b6d |
557 | s = s1; |
2c2d71f5 |
558 | if (t == strpos) |
559 | goto try_at_start; |
2c2d71f5 |
560 | goto try_at_offset; |
561 | } |
562 | } |
cad2e5aa |
563 | } |
2c2d71f5 |
564 | |
565 | t = s - prog->check_offset_max; |
566 | tmp = PL_bostr; |
567 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ |
568 | && (!(prog->reganch & ROPT_UTF8) |
569 | || (PL_bostr = strpos, /* Used in regcopmaybe() */ |
570 | ((t = reghopmaybe_c(s, -(prog->check_offset_max))) |
571 | && t > strpos)))) { |
572 | PL_bostr = tmp; |
573 | /* Fixed substring is found far enough so that the match |
574 | cannot start at strpos. */ |
575 | try_at_offset: |
cad2e5aa |
576 | if (ml_anch && t[-1] != '\n') { |
30944b6d |
577 | /* Eventually fbm_*() should handle this, but often |
578 | anchored_offset is not 0, so this check will not be wasted. */ |
579 | /* XXXX In the code below we prefer to look for "^" even in |
580 | presence of anchored substrings. And we search even |
581 | beyond the found float position. These pessimizations |
582 | are historical artefacts only. */ |
583 | find_anchor: |
2c2d71f5 |
584 | while (t < strend - prog->minlen) { |
cad2e5aa |
585 | if (*t == '\n') { |
586 | if (t < s - prog->check_offset_min) { |
30944b6d |
587 | if (prog->anchored_substr) { |
588 | /* We definitely contradict the found anchored |
589 | substr. Due to the above check we do not |
590 | contradict "check" substr. |
591 | Thus we can arrive here only if check substr |
592 | is float. Redo checking for "other"=="fixed". |
593 | */ |
594 | strpos = t + 1; |
595 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n", |
596 | PL_colors[0],PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset))); |
597 | goto do_other_anchored; |
598 | } |
cad2e5aa |
599 | s = t + 1; |
2c2d71f5 |
600 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n", |
30944b6d |
601 | PL_colors[0],PL_colors[1], (long)(s - i_strpos))); |
cad2e5aa |
602 | goto set_useful; |
603 | } |
2c2d71f5 |
604 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting at offset %ld...\n", |
30944b6d |
605 | PL_colors[0],PL_colors[1], (long)(t + 1 - i_strpos))); |
606 | strpos = s = t + 1; |
cad2e5aa |
607 | goto restart; |
608 | } |
609 | t++; |
610 | } |
2c2d71f5 |
611 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n", |
612 | PL_colors[0],PL_colors[1])); |
613 | goto fail_finish; |
cad2e5aa |
614 | } |
615 | s = t; |
616 | set_useful: |
2c2d71f5 |
617 | ++BmUSEFUL(prog->check_substr); /* hooray/5 */ |
cad2e5aa |
618 | } |
619 | else { |
2c2d71f5 |
620 | PL_bostr = tmp; |
621 | /* The found string does not prohibit matching at beg-of-str |
622 | - no optimization of calling REx engine can be performed, |
623 | unless it was an MBOL and we are not after MBOL. */ |
624 | try_at_start: |
625 | /* Even in this situation we may use MBOL flag if strpos is offset |
626 | wrt the start of the string. */ |
627 | if (ml_anch && sv |
cad2e5aa |
628 | && (strpos + SvCUR(sv) != strend) && strpos[-1] != '\n') { |
629 | t = strpos; |
630 | goto find_anchor; |
631 | } |
30944b6d |
632 | DEBUG_r( if (ml_anch) |
633 | PerlIO_printf(Perl_debug_log, "Does not contradict /%s^%s/m...\n", |
634 | PL_colors[0],PL_colors[1]); |
635 | ); |
2c2d71f5 |
636 | success_at_start: |
30944b6d |
637 | if (!(prog->reganch & ROPT_NAUGHTY) /* XXXX If strpos moved? */ |
cad2e5aa |
638 | && --BmUSEFUL(prog->check_substr) < 0 |
639 | && prog->check_substr == prog->float_substr) { /* boo */ |
640 | /* If flags & SOMETHING - do not do it many times on the same match */ |
641 | SvREFCNT_dec(prog->check_substr); |
642 | prog->check_substr = Nullsv; /* disable */ |
643 | prog->float_substr = Nullsv; /* clear */ |
644 | s = strpos; |
645 | prog->reganch &= ~RE_USE_INTUIT; |
646 | } |
647 | else |
648 | s = strpos; |
649 | } |
650 | |
2c2d71f5 |
651 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%sGuessed:%s match at offset %ld\n", |
30944b6d |
652 | PL_colors[4], PL_colors[5], (long)(s - i_strpos)) ); |
cad2e5aa |
653 | return s; |
2c2d71f5 |
654 | |
655 | fail_finish: /* Substring not found */ |
656 | BmUSEFUL(prog->check_substr) += 5; /* hooray */ |
cad2e5aa |
657 | fail: |
2c2d71f5 |
658 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n", |
cad2e5aa |
659 | PL_colors[4],PL_colors[5])); |
660 | return Nullch; |
661 | } |
9661b544 |
662 | |
a687059c |
663 | /* |
c277df42 |
664 | - regexec_flags - match a regexp against a string |
a687059c |
665 | */ |
79072805 |
666 | I32 |
864dbfa3 |
667 | Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char *strend, |
22e551b9 |
668 | char *strbeg, I32 minend, SV *sv, void *data, U32 flags) |
c277df42 |
669 | /* strend: pointer to null at end of string */ |
670 | /* strbeg: real beginning of string */ |
671 | /* minend: end of match must be >=minend after stringarg. */ |
672 | /* data: May be used for some additional optimizations. */ |
673 | /* nosave: For optimizations. */ |
a687059c |
674 | { |
5c0ca799 |
675 | dTHR; |
a0d0e21e |
676 | register char *s; |
c277df42 |
677 | register regnode *c; |
a0d0e21e |
678 | register char *startpos = stringarg; |
679 | register I32 tmp; |
c277df42 |
680 | I32 minlen; /* must match at least this many chars */ |
a0d0e21e |
681 | I32 dontbother = 0; /* how many characters not to try at end */ |
c277df42 |
682 | I32 start_shift = 0; /* Offset of the start to find |
a0ed51b3 |
683 | constant substr. */ /* CC */ |
684 | I32 end_shift = 0; /* Same for the end. */ /* CC */ |
c277df42 |
685 | I32 scream_pos = -1; /* Internal iterator of scream. */ |
686 | char *scream_olds; |
3280af22 |
687 | SV* oreplsv = GvSV(PL_replgv); |
a687059c |
688 | |
2ab05381 |
689 | PL_regcc = 0; |
a0d0e21e |
690 | |
0f5d15d6 |
691 | cache_re(prog); |
a0d0e21e |
692 | #ifdef DEBUGGING |
3280af22 |
693 | PL_regnarrate = PL_debug & 512; |
a0d0e21e |
694 | #endif |
695 | |
696 | /* Be paranoid... */ |
697 | if (prog == NULL || startpos == NULL) { |
cea2e8a9 |
698 | Perl_croak(aTHX_ "NULL regexp parameter"); |
a0d0e21e |
699 | return 0; |
700 | } |
701 | |
c277df42 |
702 | minlen = prog->minlen; |
703 | if (strend - startpos < minlen) goto phooey; |
704 | |
a0d0e21e |
705 | if (startpos == strbeg) /* is ^ valid at stringarg? */ |
3280af22 |
706 | PL_regprev = '\n'; |
a0d0e21e |
707 | else { |
a0ed51b3 |
708 | PL_regprev = (U32)stringarg[-1]; |
3280af22 |
709 | if (!PL_multiline && PL_regprev == '\n') |
710 | PL_regprev = '\0'; /* force ^ to NOT match */ |
a0d0e21e |
711 | } |
bbce6d69 |
712 | |
a0d0e21e |
713 | /* Check validity of program. */ |
22c35a8c |
714 | if (UCHARAT(prog->program) != REG_MAGIC) { |
cea2e8a9 |
715 | Perl_croak(aTHX_ "corrupted regexp program"); |
a0d0e21e |
716 | } |
717 | |
3280af22 |
718 | PL_reg_flags = 0; |
719 | PL_reg_eval_set = 0; |
2c2d71f5 |
720 | PL_reg_maxiter = 0; |
a0d0e21e |
721 | |
a0ed51b3 |
722 | if (prog->reganch & ROPT_UTF8) |
723 | PL_reg_flags |= RF_utf8; |
724 | |
725 | /* Mark beginning of line for ^ and lookbehind. */ |
726 | PL_regbol = startpos; |
727 | PL_bostr = strbeg; |
9661b544 |
728 | PL_reg_sv = sv; |
a0ed51b3 |
729 | |
730 | /* Mark end of line for $ (and such) */ |
731 | PL_regeol = strend; |
732 | |
733 | /* see how far we have to get to not match where we matched before */ |
734 | PL_regtill = startpos+minend; |
735 | |
0f5d15d6 |
736 | /* We start without call_cc context. */ |
737 | PL_reg_call_cc = 0; |
738 | |
a0d0e21e |
739 | /* If there is a "must appear" string, look for it. */ |
740 | s = startpos; |
cad2e5aa |
741 | |
30382c73 |
742 | if (prog->reganch & ROPT_GPOS_SEEN) { /* Need to have PL_reg_ganch */ |
cad2e5aa |
743 | MAGIC *mg; |
744 | |
30382c73 |
745 | if (flags & REXEC_IGNOREPOS) /* Means: check only at start */ |
cad2e5aa |
746 | PL_reg_ganch = startpos; |
30382c73 |
747 | else if (sv && SvTYPE(sv) >= SVt_PVMG |
748 | && SvMAGIC(sv) |
749 | && (mg = mg_find(sv, 'g')) && mg->mg_len >= 0) { |
750 | PL_reg_ganch = strbeg + mg->mg_len; /* Defined pos() */ |
751 | if (prog->reganch & ROPT_ANCH_GPOS) { |
752 | if (s > PL_reg_ganch) |
753 | goto phooey; |
754 | s = PL_reg_ganch; |
755 | } |
a0ed51b3 |
756 | } |
30382c73 |
757 | else /* pos() not defined */ |
758 | PL_reg_ganch = strbeg; |
a0d0e21e |
759 | } |
a687059c |
760 | |
cad2e5aa |
761 | if (!(flags & REXEC_CHECKED) && prog->check_substr != Nullsv) { |
762 | re_scream_pos_data d; |
763 | |
764 | d.scream_olds = &scream_olds; |
765 | d.scream_pos = &scream_pos; |
766 | s = re_intuit_start(prog, sv, s, strend, flags, &d); |
767 | if (!s) |
768 | goto phooey; /* not present */ |
769 | } |
770 | |
771 | DEBUG_r( if (!PL_colorset) reginitcolors() ); |
772 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
2c2d71f5 |
773 | "%sMatching REx%s `%s%.60s%s%s' against `%s%.*s%s%s'\n", |
8d300b32 |
774 | PL_colors[4],PL_colors[5],PL_colors[0], |
775 | prog->precomp, |
776 | PL_colors[1], |
c277df42 |
777 | (strlen(prog->precomp) > 60 ? "..." : ""), |
cad2e5aa |
778 | PL_colors[0], |
c277df42 |
779 | (strend - startpos > 60 ? 60 : strend - startpos), |
8d300b32 |
780 | startpos, PL_colors[1], |
c277df42 |
781 | (strend - startpos > 60 ? "..." : "")) |
782 | ); |
783 | |
a0d0e21e |
784 | /* Simplest case: anchored match need be tried only once. */ |
774d564b |
785 | /* [unless only anchor is BOL and multiline is set] */ |
22e551b9 |
786 | if (prog->reganch & (ROPT_ANCH & ~ROPT_ANCH_GPOS)) { |
cad2e5aa |
787 | if (s == startpos && regtry(prog, startpos)) |
a0d0e21e |
788 | goto got_it; |
22e551b9 |
789 | else if (PL_multiline || (prog->reganch & ROPT_IMPLICIT) |
790 | || (prog->reganch & ROPT_ANCH_MBOL)) /* XXXX SBOL? */ |
774d564b |
791 | { |
cad2e5aa |
792 | char *end; |
793 | |
a0d0e21e |
794 | if (minlen) |
795 | dontbother = minlen - 1; |
cad2e5aa |
796 | end = HOPc(strend, -dontbother) - 1; |
a0d0e21e |
797 | /* for multiline we only have to try after newlines */ |
cad2e5aa |
798 | if (prog->check_substr) { |
30944b6d |
799 | if (s == startpos) |
800 | goto after_try; |
cad2e5aa |
801 | while (1) { |
802 | if (regtry(prog, s)) |
a0d0e21e |
803 | goto got_it; |
30944b6d |
804 | after_try: |
cad2e5aa |
805 | if (s >= end) |
806 | goto phooey; |
807 | s = re_intuit_start(prog, sv, s + 1, strend, flags, NULL); |
808 | if (!s) |
809 | goto phooey; |
810 | } |
811 | } else { |
812 | if (s > startpos) |
813 | s--; |
814 | while (s < end) { |
815 | if (*s++ == '\n') { /* don't need PL_utf8skip here */ |
816 | if (regtry(prog, s)) |
817 | goto got_it; |
818 | } |
819 | } |
35c8bce7 |
820 | } |
35c8bce7 |
821 | } |
a0d0e21e |
822 | goto phooey; |
22e551b9 |
823 | } else if (prog->reganch & ROPT_ANCH_GPOS) { |
824 | if (regtry(prog, PL_reg_ganch)) |
825 | goto got_it; |
826 | goto phooey; |
a0d0e21e |
827 | } |
35c8bce7 |
828 | |
a0d0e21e |
829 | /* Messy cases: unanchored match. */ |
c277df42 |
830 | if (prog->anchored_substr && prog->reganch & ROPT_SKIP) { |
831 | /* we have /x+whatever/ */ |
cad2e5aa |
832 | /* it must be a one character string (XXXX Except UTF?) */ |
c277df42 |
833 | char ch = SvPVX(prog->anchored_substr)[0]; |
a0ed51b3 |
834 | if (UTF) { |
835 | while (s < strend) { |
836 | if (*s == ch) { |
837 | if (regtry(prog, s)) goto got_it; |
838 | s += UTF8SKIP(s); |
839 | while (s < strend && *s == ch) |
840 | s += UTF8SKIP(s); |
841 | } |
842 | s += UTF8SKIP(s); |
843 | } |
844 | } |
845 | else { |
846 | while (s < strend) { |
847 | if (*s == ch) { |
848 | if (regtry(prog, s)) goto got_it; |
c277df42 |
849 | s++; |
a0ed51b3 |
850 | while (s < strend && *s == ch) |
851 | s++; |
852 | } |
853 | s++; |
a0d0e21e |
854 | } |
a687059c |
855 | } |
c277df42 |
856 | } |
857 | /*SUPPRESS 560*/ |
858 | else if (prog->anchored_substr != Nullsv |
859 | || (prog->float_substr != Nullsv |
860 | && prog->float_max_offset < strend - s)) { |
861 | SV *must = prog->anchored_substr |
862 | ? prog->anchored_substr : prog->float_substr; |
863 | I32 back_max = |
864 | prog->anchored_substr ? prog->anchored_offset : prog->float_max_offset; |
865 | I32 back_min = |
866 | prog->anchored_substr ? prog->anchored_offset : prog->float_min_offset; |
867 | I32 delta = back_max - back_min; |
cf93c79d |
868 | char *last = HOPc(strend, /* Cannot start after this */ |
73c4f7a1 |
869 | -(I32)(CHR_SVLEN(must) |
870 | - (SvTAIL(must) != 0) + back_min)); |
a0ed51b3 |
871 | char *last1; /* Last position checked before */ |
872 | |
873 | if (s > PL_bostr) |
dfe13c55 |
874 | last1 = HOPc(s, -1); |
a0ed51b3 |
875 | else |
876 | last1 = s - 1; /* bogus */ |
c277df42 |
877 | |
878 | /* XXXX check_substr already used to find `s', can optimize if |
879 | check_substr==must. */ |
880 | scream_pos = -1; |
881 | dontbother = end_shift; |
dfe13c55 |
882 | strend = HOPc(strend, -dontbother); |
c277df42 |
883 | while ( (s <= last) && |
22e551b9 |
884 | ((flags & REXEC_SCREAM) |
885 | ? (s = screaminstr(sv, must, HOPc(s, back_min) - strbeg, |
c277df42 |
886 | end_shift, &scream_pos, 0)) |
a0ed51b3 |
887 | : (s = fbm_instr((unsigned char*)HOP(s, back_min), |
cf93c79d |
888 | (unsigned char*)strend, must, |
889 | PL_multiline ? FBMrf_MULTILINE : 0))) ) { |
dfe13c55 |
890 | if (HOPc(s, -back_max) > last1) { |
891 | last1 = HOPc(s, -back_min); |
892 | s = HOPc(s, -back_max); |
a0ed51b3 |
893 | } |
894 | else { |
dfe13c55 |
895 | char *t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1; |
c277df42 |
896 | |
dfe13c55 |
897 | last1 = HOPc(s, -back_min); |
c277df42 |
898 | s = t; |
a0d0e21e |
899 | } |
a0ed51b3 |
900 | if (UTF) { |
901 | while (s <= last1) { |
902 | if (regtry(prog, s)) |
903 | goto got_it; |
904 | s += UTF8SKIP(s); |
905 | } |
906 | } |
907 | else { |
908 | while (s <= last1) { |
909 | if (regtry(prog, s)) |
910 | goto got_it; |
911 | s++; |
912 | } |
a0d0e21e |
913 | } |
914 | } |
915 | goto phooey; |
a0ed51b3 |
916 | } |
917 | else if (c = prog->regstclass) { |
a0d0e21e |
918 | I32 doevery = (prog->reganch & ROPT_SKIP) == 0; |
a0ed51b3 |
919 | char *cc; |
a687059c |
920 | |
a0d0e21e |
921 | if (minlen) |
922 | dontbother = minlen - 1; |
dfe13c55 |
923 | strend = HOPc(strend, -dontbother); /* don't bother with what can't match */ |
a0d0e21e |
924 | tmp = 1; |
925 | /* We know what class it must start with. */ |
926 | switch (OP(c)) { |
a0ed51b3 |
927 | case ANYOFUTF8: |
cd439c50 |
928 | cc = MASK(c); |
a0ed51b3 |
929 | while (s < strend) { |
930 | if (REGINCLASSUTF8(c, (U8*)s)) { |
931 | if (tmp && regtry(prog, s)) |
932 | goto got_it; |
933 | else |
934 | tmp = doevery; |
935 | } |
936 | else |
937 | tmp = 1; |
938 | s += UTF8SKIP(s); |
939 | } |
940 | break; |
a0d0e21e |
941 | case ANYOF: |
cd439c50 |
942 | cc = MASK(c); |
a0d0e21e |
943 | while (s < strend) { |
a0ed51b3 |
944 | if (REGINCLASS(cc, *s)) { |
a0d0e21e |
945 | if (tmp && regtry(prog, s)) |
946 | goto got_it; |
947 | else |
948 | tmp = doevery; |
a687059c |
949 | } |
a0d0e21e |
950 | else |
951 | tmp = 1; |
952 | s++; |
953 | } |
954 | break; |
bbce6d69 |
955 | case BOUNDL: |
3280af22 |
956 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
957 | /* FALL THROUGH */ |
a0d0e21e |
958 | case BOUND: |
a0ed51b3 |
959 | if (minlen) { |
960 | dontbother++; |
961 | strend -= 1; |
962 | } |
3280af22 |
963 | tmp = (s != startpos) ? UCHARAT(s - 1) : PL_regprev; |
95bac841 |
964 | tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0); |
a0d0e21e |
965 | while (s < strend) { |
95bac841 |
966 | if (tmp == !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) { |
a0d0e21e |
967 | tmp = !tmp; |
968 | if (regtry(prog, s)) |
969 | goto got_it; |
a687059c |
970 | } |
a0d0e21e |
971 | s++; |
972 | } |
973 | if ((minlen || tmp) && regtry(prog,s)) |
974 | goto got_it; |
975 | break; |
a0ed51b3 |
976 | case BOUNDLUTF8: |
977 | PL_reg_flags |= RF_tainted; |
978 | /* FALL THROUGH */ |
979 | case BOUNDUTF8: |
980 | if (minlen) { |
981 | dontbother++; |
dfe13c55 |
982 | strend = reghop_c(strend, -1); |
a0ed51b3 |
983 | } |
dfe13c55 |
984 | tmp = (I32)(s != startpos) ? utf8_to_uv(reghop((U8*)s, -1), 0) : PL_regprev; |
a0ed51b3 |
985 | tmp = ((OP(c) == BOUND ? isALNUM_uni(tmp) : isALNUM_LC_uni(tmp)) != 0); |
986 | while (s < strend) { |
dfe13c55 |
987 | if (tmp == !(OP(c) == BOUND ? |
988 | swash_fetch(PL_utf8_alnum, (U8*)s) : |
989 | isALNUM_LC_utf8((U8*)s))) |
990 | { |
a0ed51b3 |
991 | tmp = !tmp; |
992 | if (regtry(prog, s)) |
993 | goto got_it; |
994 | } |
995 | s += UTF8SKIP(s); |
996 | } |
997 | if ((minlen || tmp) && regtry(prog,s)) |
998 | goto got_it; |
999 | break; |
bbce6d69 |
1000 | case NBOUNDL: |
3280af22 |
1001 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
1002 | /* FALL THROUGH */ |
a0d0e21e |
1003 | case NBOUND: |
a0ed51b3 |
1004 | if (minlen) { |
1005 | dontbother++; |
1006 | strend -= 1; |
1007 | } |
3280af22 |
1008 | tmp = (s != startpos) ? UCHARAT(s - 1) : PL_regprev; |
95bac841 |
1009 | tmp = ((OP(c) == NBOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0); |
a0d0e21e |
1010 | while (s < strend) { |
95bac841 |
1011 | if (tmp == !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s))) |
a0d0e21e |
1012 | tmp = !tmp; |
1013 | else if (regtry(prog, s)) |
1014 | goto got_it; |
1015 | s++; |
1016 | } |
1017 | if ((minlen || !tmp) && regtry(prog,s)) |
1018 | goto got_it; |
1019 | break; |
a0ed51b3 |
1020 | case NBOUNDLUTF8: |
1021 | PL_reg_flags |= RF_tainted; |
1022 | /* FALL THROUGH */ |
1023 | case NBOUNDUTF8: |
1024 | if (minlen) { |
1025 | dontbother++; |
dfe13c55 |
1026 | strend = reghop_c(strend, -1); |
a0ed51b3 |
1027 | } |
dfe13c55 |
1028 | tmp = (I32)(s != startpos) ? utf8_to_uv(reghop((U8*)s, -1), 0) : PL_regprev; |
a0ed51b3 |
1029 | tmp = ((OP(c) == NBOUND ? isALNUM_uni(tmp) : isALNUM_LC_uni(tmp)) != 0); |
1030 | while (s < strend) { |
dfe13c55 |
1031 | if (tmp == !(OP(c) == NBOUND ? |
1032 | swash_fetch(PL_utf8_alnum, (U8*)s) : |
1033 | isALNUM_LC_utf8((U8*)s))) |
a0ed51b3 |
1034 | tmp = !tmp; |
1035 | else if (regtry(prog, s)) |
1036 | goto got_it; |
1037 | s += UTF8SKIP(s); |
1038 | } |
1039 | if ((minlen || !tmp) && regtry(prog,s)) |
1040 | goto got_it; |
1041 | break; |
a0d0e21e |
1042 | case ALNUM: |
1043 | while (s < strend) { |
bbce6d69 |
1044 | if (isALNUM(*s)) { |
1045 | if (tmp && regtry(prog, s)) |
1046 | goto got_it; |
1047 | else |
1048 | tmp = doevery; |
1049 | } |
1050 | else |
1051 | tmp = 1; |
1052 | s++; |
1053 | } |
1054 | break; |
a0ed51b3 |
1055 | case ALNUMUTF8: |
1056 | while (s < strend) { |
dfe13c55 |
1057 | if (swash_fetch(PL_utf8_alnum, (U8*)s)) { |
a0ed51b3 |
1058 | if (tmp && regtry(prog, s)) |
1059 | goto got_it; |
1060 | else |
1061 | tmp = doevery; |
1062 | } |
1063 | else |
1064 | tmp = 1; |
1065 | s += UTF8SKIP(s); |
1066 | } |
1067 | break; |
bbce6d69 |
1068 | case ALNUML: |
3280af22 |
1069 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
1070 | while (s < strend) { |
1071 | if (isALNUM_LC(*s)) { |
a0d0e21e |
1072 | if (tmp && regtry(prog, s)) |
1073 | goto got_it; |
a687059c |
1074 | else |
a0d0e21e |
1075 | tmp = doevery; |
1076 | } |
1077 | else |
1078 | tmp = 1; |
1079 | s++; |
1080 | } |
1081 | break; |
a0ed51b3 |
1082 | case ALNUMLUTF8: |
1083 | PL_reg_flags |= RF_tainted; |
1084 | while (s < strend) { |
dfe13c55 |
1085 | if (isALNUM_LC_utf8((U8*)s)) { |
a0ed51b3 |
1086 | if (tmp && regtry(prog, s)) |
1087 | goto got_it; |
1088 | else |
1089 | tmp = doevery; |
1090 | } |
1091 | else |
1092 | tmp = 1; |
1093 | s += UTF8SKIP(s); |
1094 | } |
1095 | break; |
a0d0e21e |
1096 | case NALNUM: |
1097 | while (s < strend) { |
bbce6d69 |
1098 | if (!isALNUM(*s)) { |
1099 | if (tmp && regtry(prog, s)) |
1100 | goto got_it; |
1101 | else |
1102 | tmp = doevery; |
1103 | } |
1104 | else |
1105 | tmp = 1; |
1106 | s++; |
1107 | } |
1108 | break; |
a0ed51b3 |
1109 | case NALNUMUTF8: |
1110 | while (s < strend) { |
dfe13c55 |
1111 | if (!swash_fetch(PL_utf8_alnum, (U8*)s)) { |
a0ed51b3 |
1112 | if (tmp && regtry(prog, s)) |
1113 | goto got_it; |
1114 | else |
1115 | tmp = doevery; |
1116 | } |
1117 | else |
1118 | tmp = 1; |
1119 | s += UTF8SKIP(s); |
1120 | } |
1121 | break; |
bbce6d69 |
1122 | case NALNUML: |
3280af22 |
1123 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
1124 | while (s < strend) { |
1125 | if (!isALNUM_LC(*s)) { |
a0d0e21e |
1126 | if (tmp && regtry(prog, s)) |
1127 | goto got_it; |
a687059c |
1128 | else |
a0d0e21e |
1129 | tmp = doevery; |
a687059c |
1130 | } |
a0d0e21e |
1131 | else |
1132 | tmp = 1; |
1133 | s++; |
1134 | } |
1135 | break; |
a0ed51b3 |
1136 | case NALNUMLUTF8: |
1137 | PL_reg_flags |= RF_tainted; |
1138 | while (s < strend) { |
dfe13c55 |
1139 | if (!isALNUM_LC_utf8((U8*)s)) { |
a0ed51b3 |
1140 | if (tmp && regtry(prog, s)) |
1141 | goto got_it; |
1142 | else |
1143 | tmp = doevery; |
1144 | } |
1145 | else |
1146 | tmp = 1; |
1147 | s += UTF8SKIP(s); |
1148 | } |
1149 | break; |
a0d0e21e |
1150 | case SPACE: |
1151 | while (s < strend) { |
1152 | if (isSPACE(*s)) { |
1153 | if (tmp && regtry(prog, s)) |
1154 | goto got_it; |
1155 | else |
1156 | tmp = doevery; |
2304df62 |
1157 | } |
a0d0e21e |
1158 | else |
1159 | tmp = 1; |
1160 | s++; |
1161 | } |
1162 | break; |
a0ed51b3 |
1163 | case SPACEUTF8: |
1164 | while (s < strend) { |
dfe13c55 |
1165 | if (*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s)) { |
a0ed51b3 |
1166 | if (tmp && regtry(prog, s)) |
1167 | goto got_it; |
1168 | else |
1169 | tmp = doevery; |
1170 | } |
1171 | else |
1172 | tmp = 1; |
1173 | s += UTF8SKIP(s); |
1174 | } |
1175 | break; |
bbce6d69 |
1176 | case SPACEL: |
3280af22 |
1177 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
1178 | while (s < strend) { |
1179 | if (isSPACE_LC(*s)) { |
1180 | if (tmp && regtry(prog, s)) |
1181 | goto got_it; |
1182 | else |
1183 | tmp = doevery; |
1184 | } |
1185 | else |
1186 | tmp = 1; |
1187 | s++; |
1188 | } |
1189 | break; |
a0ed51b3 |
1190 | case SPACELUTF8: |
1191 | PL_reg_flags |= RF_tainted; |
1192 | while (s < strend) { |
dfe13c55 |
1193 | if (*s == ' ' || isSPACE_LC_utf8((U8*)s)) { |
a0ed51b3 |
1194 | if (tmp && regtry(prog, s)) |
1195 | goto got_it; |
1196 | else |
1197 | tmp = doevery; |
1198 | } |
1199 | else |
1200 | tmp = 1; |
1201 | s += UTF8SKIP(s); |
1202 | } |
1203 | break; |
a0d0e21e |
1204 | case NSPACE: |
1205 | while (s < strend) { |
1206 | if (!isSPACE(*s)) { |
1207 | if (tmp && regtry(prog, s)) |
1208 | goto got_it; |
1209 | else |
1210 | tmp = doevery; |
a687059c |
1211 | } |
a0d0e21e |
1212 | else |
1213 | tmp = 1; |
1214 | s++; |
1215 | } |
1216 | break; |
a0ed51b3 |
1217 | case NSPACEUTF8: |
1218 | while (s < strend) { |
dfe13c55 |
1219 | if (!(*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s))) { |
a0ed51b3 |
1220 | if (tmp && regtry(prog, s)) |
1221 | goto got_it; |
1222 | else |
1223 | tmp = doevery; |
1224 | } |
1225 | else |
1226 | tmp = 1; |
1227 | s += UTF8SKIP(s); |
1228 | } |
1229 | break; |
bbce6d69 |
1230 | case NSPACEL: |
3280af22 |
1231 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
1232 | while (s < strend) { |
1233 | if (!isSPACE_LC(*s)) { |
1234 | if (tmp && regtry(prog, s)) |
1235 | goto got_it; |
1236 | else |
1237 | tmp = doevery; |
1238 | } |
1239 | else |
1240 | tmp = 1; |
1241 | s++; |
1242 | } |
1243 | break; |
a0ed51b3 |
1244 | case NSPACELUTF8: |
1245 | PL_reg_flags |= RF_tainted; |
1246 | while (s < strend) { |
dfe13c55 |
1247 | if (!(*s == ' ' || isSPACE_LC_utf8((U8*)s))) { |
a0ed51b3 |
1248 | if (tmp && regtry(prog, s)) |
1249 | goto got_it; |
1250 | else |
1251 | tmp = doevery; |
1252 | } |
1253 | else |
1254 | tmp = 1; |
1255 | s += UTF8SKIP(s); |
1256 | } |
1257 | break; |
a0d0e21e |
1258 | case DIGIT: |
1259 | while (s < strend) { |
1260 | if (isDIGIT(*s)) { |
1261 | if (tmp && regtry(prog, s)) |
1262 | goto got_it; |
1263 | else |
1264 | tmp = doevery; |
2b69d0c2 |
1265 | } |
a0d0e21e |
1266 | else |
1267 | tmp = 1; |
1268 | s++; |
1269 | } |
1270 | break; |
a0ed51b3 |
1271 | case DIGITUTF8: |
1272 | while (s < strend) { |
dfe13c55 |
1273 | if (swash_fetch(PL_utf8_digit,(U8*)s)) { |
a0ed51b3 |
1274 | if (tmp && regtry(prog, s)) |
1275 | goto got_it; |
1276 | else |
1277 | tmp = doevery; |
1278 | } |
1279 | else |
1280 | tmp = 1; |
1281 | s += UTF8SKIP(s); |
1282 | } |
1283 | break; |
b8c5462f |
1284 | case DIGITL: |
1285 | PL_reg_flags |= RF_tainted; |
1286 | while (s < strend) { |
1287 | if (isDIGIT_LC(*s)) { |
1288 | if (tmp && regtry(prog, s)) |
1289 | goto got_it; |
1290 | else |
1291 | tmp = doevery; |
1292 | } |
1293 | else |
1294 | tmp = 1; |
1295 | s++; |
1296 | } |
1297 | break; |
1298 | case DIGITLUTF8: |
1299 | PL_reg_flags |= RF_tainted; |
1300 | while (s < strend) { |
1301 | if (isDIGIT_LC_utf8((U8*)s)) { |
1302 | if (tmp && regtry(prog, s)) |
1303 | goto got_it; |
1304 | else |
1305 | tmp = doevery; |
1306 | } |
1307 | else |
1308 | tmp = 1; |
1309 | s += UTF8SKIP(s); |
1310 | } |
1311 | break; |
a0d0e21e |
1312 | case NDIGIT: |
1313 | while (s < strend) { |
1314 | if (!isDIGIT(*s)) { |
1315 | if (tmp && regtry(prog, s)) |
1316 | goto got_it; |
1317 | else |
1318 | tmp = doevery; |
a687059c |
1319 | } |
a0d0e21e |
1320 | else |
1321 | tmp = 1; |
1322 | s++; |
1323 | } |
1324 | break; |
a0ed51b3 |
1325 | case NDIGITUTF8: |
1326 | while (s < strend) { |
dfe13c55 |
1327 | if (!swash_fetch(PL_utf8_digit,(U8*)s)) { |
a0ed51b3 |
1328 | if (tmp && regtry(prog, s)) |
1329 | goto got_it; |
1330 | else |
1331 | tmp = doevery; |
1332 | } |
1333 | else |
1334 | tmp = 1; |
1335 | s += UTF8SKIP(s); |
1336 | } |
1337 | break; |
b8c5462f |
1338 | case NDIGITL: |
1339 | PL_reg_flags |= RF_tainted; |
1340 | while (s < strend) { |
1341 | if (!isDIGIT_LC(*s)) { |
1342 | if (tmp && regtry(prog, s)) |
1343 | goto got_it; |
1344 | else |
1345 | tmp = doevery; |
1346 | } |
1347 | else |
1348 | tmp = 1; |
1349 | s++; |
a0ed51b3 |
1350 | } |
b8c5462f |
1351 | break; |
1352 | case NDIGITLUTF8: |
1353 | PL_reg_flags |= RF_tainted; |
1354 | while (s < strend) { |
1355 | if (!isDIGIT_LC_utf8((U8*)s)) { |
1356 | if (tmp && regtry(prog, s)) |
1357 | goto got_it; |
cf93c79d |
1358 | else |
b8c5462f |
1359 | tmp = doevery; |
1360 | } |
1361 | else |
1362 | tmp = 1; |
1363 | s += UTF8SKIP(s); |
1364 | } |
1365 | break; |
d6a28714 |
1366 | } |
1367 | } |
1368 | else { |
1369 | dontbother = 0; |
1370 | if (prog->float_substr != Nullsv) { /* Trim the end. */ |
1371 | char *last; |
1372 | I32 oldpos = scream_pos; |
1373 | |
1374 | if (flags & REXEC_SCREAM) { |
1375 | last = screaminstr(sv, prog->float_substr, s - strbeg, |
1376 | end_shift, &scream_pos, 1); /* last one */ |
1377 | if (!last) |
1378 | last = scream_olds; /* Only one occurence. */ |
b8c5462f |
1379 | } |
d6a28714 |
1380 | else { |
1381 | STRLEN len; |
1382 | char *little = SvPV(prog->float_substr, len); |
1383 | |
1384 | if (SvTAIL(prog->float_substr)) { |
1385 | if (memEQ(strend - len + 1, little, len - 1)) |
1386 | last = strend - len + 1; |
1387 | else if (!PL_multiline) |
1388 | last = memEQ(strend - len, little, len) |
1389 | ? strend - len : Nullch; |
b8c5462f |
1390 | else |
d6a28714 |
1391 | goto find_last; |
1392 | } else { |
1393 | find_last: |
1394 | if (len) |
1395 | last = rninstr(s, strend, little, little + len); |
b8c5462f |
1396 | else |
d6a28714 |
1397 | last = strend; /* matching `$' */ |
b8c5462f |
1398 | } |
b8c5462f |
1399 | } |
d6a28714 |
1400 | if (last == NULL) goto phooey; /* Should not happen! */ |
1401 | dontbother = strend - last + prog->float_min_offset; |
1402 | } |
1403 | if (minlen && (dontbother < minlen)) |
1404 | dontbother = minlen - 1; |
1405 | strend -= dontbother; /* this one's always in bytes! */ |
1406 | /* We don't know much -- general case. */ |
1407 | if (UTF) { |
1408 | for (;;) { |
1409 | if (regtry(prog, s)) |
1410 | goto got_it; |
1411 | if (s >= strend) |
1412 | break; |
b8c5462f |
1413 | s += UTF8SKIP(s); |
d6a28714 |
1414 | }; |
1415 | } |
1416 | else { |
1417 | do { |
1418 | if (regtry(prog, s)) |
1419 | goto got_it; |
1420 | } while (s++ < strend); |
1421 | } |
1422 | } |
1423 | |
1424 | /* Failure. */ |
1425 | goto phooey; |
1426 | |
1427 | got_it: |
1428 | RX_MATCH_TAINTED_set(prog, PL_reg_flags & RF_tainted); |
1429 | |
1430 | if (PL_reg_eval_set) { |
1431 | /* Preserve the current value of $^R */ |
1432 | if (oreplsv != GvSV(PL_replgv)) |
1433 | sv_setsv(oreplsv, GvSV(PL_replgv));/* So that when GvSV(replgv) is |
1434 | restored, the value remains |
1435 | the same. */ |
1436 | restore_pos(aTHXo_ 0); |
1437 | } |
1438 | |
1439 | /* make sure $`, $&, $', and $digit will work later */ |
1440 | if ( !(flags & REXEC_NOT_FIRST) ) { |
1441 | if (RX_MATCH_COPIED(prog)) { |
1442 | Safefree(prog->subbeg); |
1443 | RX_MATCH_COPIED_off(prog); |
1444 | } |
1445 | if (flags & REXEC_COPY_STR) { |
1446 | I32 i = PL_regeol - startpos + (stringarg - strbeg); |
1447 | |
1448 | s = savepvn(strbeg, i); |
1449 | prog->subbeg = s; |
1450 | prog->sublen = i; |
1451 | RX_MATCH_COPIED_on(prog); |
1452 | } |
1453 | else { |
1454 | prog->subbeg = strbeg; |
1455 | prog->sublen = PL_regeol - strbeg; /* strend may have been modified */ |
1456 | } |
1457 | } |
1458 | |
1459 | return 1; |
1460 | |
1461 | phooey: |
1462 | if (PL_reg_eval_set) |
1463 | restore_pos(aTHXo_ 0); |
1464 | return 0; |
1465 | } |
1466 | |
1467 | /* |
1468 | - regtry - try match at specific point |
1469 | */ |
1470 | STATIC I32 /* 0 failure, 1 success */ |
1471 | S_regtry(pTHX_ regexp *prog, char *startpos) |
1472 | { |
1473 | dTHR; |
1474 | register I32 i; |
1475 | register I32 *sp; |
1476 | register I32 *ep; |
1477 | CHECKPOINT lastcp; |
1478 | |
1479 | if ((prog->reganch & ROPT_EVAL_SEEN) && !PL_reg_eval_set) { |
1480 | MAGIC *mg; |
1481 | |
1482 | PL_reg_eval_set = RS_init; |
1483 | DEBUG_r(DEBUG_s( |
1484 | PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %i\n", |
1485 | PL_stack_sp - PL_stack_base); |
1486 | )); |
1487 | SAVEINT(cxstack[cxstack_ix].blk_oldsp); |
1488 | cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base; |
1489 | /* Otherwise OP_NEXTSTATE will free whatever on stack now. */ |
1490 | SAVETMPS; |
1491 | /* Apparently this is not needed, judging by wantarray. */ |
1492 | /* SAVEINT(cxstack[cxstack_ix].blk_gimme); |
1493 | cxstack[cxstack_ix].blk_gimme = G_SCALAR; */ |
1494 | |
1495 | if (PL_reg_sv) { |
1496 | /* Make $_ available to executed code. */ |
1497 | if (PL_reg_sv != DEFSV) { |
1498 | /* SAVE_DEFSV does *not* suffice here for USE_THREADS */ |
1499 | SAVESPTR(DEFSV); |
1500 | DEFSV = PL_reg_sv; |
b8c5462f |
1501 | } |
d6a28714 |
1502 | |
1503 | if (!(SvTYPE(PL_reg_sv) >= SVt_PVMG && SvMAGIC(PL_reg_sv) |
1504 | && (mg = mg_find(PL_reg_sv, 'g')))) { |
1505 | /* prepare for quick setting of pos */ |
1506 | sv_magic(PL_reg_sv, (SV*)0, 'g', Nullch, 0); |
1507 | mg = mg_find(PL_reg_sv, 'g'); |
1508 | mg->mg_len = -1; |
b8c5462f |
1509 | } |
d6a28714 |
1510 | PL_reg_magic = mg; |
1511 | PL_reg_oldpos = mg->mg_len; |
1512 | SAVEDESTRUCTOR(restore_pos, 0); |
1513 | } |
1514 | if (!PL_reg_curpm) |
1515 | New(22,PL_reg_curpm, 1, PMOP); |
1516 | PL_reg_curpm->op_pmregexp = prog; |
1517 | PL_reg_oldcurpm = PL_curpm; |
1518 | PL_curpm = PL_reg_curpm; |
1519 | if (RX_MATCH_COPIED(prog)) { |
1520 | /* Here is a serious problem: we cannot rewrite subbeg, |
1521 | since it may be needed if this match fails. Thus |
1522 | $` inside (?{}) could fail... */ |
1523 | PL_reg_oldsaved = prog->subbeg; |
1524 | PL_reg_oldsavedlen = prog->sublen; |
1525 | RX_MATCH_COPIED_off(prog); |
1526 | } |
1527 | else |
1528 | PL_reg_oldsaved = Nullch; |
1529 | prog->subbeg = PL_bostr; |
1530 | prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */ |
1531 | } |
1532 | prog->startp[0] = startpos - PL_bostr; |
1533 | PL_reginput = startpos; |
1534 | PL_regstartp = prog->startp; |
1535 | PL_regendp = prog->endp; |
1536 | PL_reglastparen = &prog->lastparen; |
1537 | prog->lastparen = 0; |
1538 | PL_regsize = 0; |
1539 | DEBUG_r(PL_reg_starttry = startpos); |
1540 | if (PL_reg_start_tmpl <= prog->nparens) { |
1541 | PL_reg_start_tmpl = prog->nparens*3/2 + 3; |
1542 | if(PL_reg_start_tmp) |
1543 | Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*); |
1544 | else |
1545 | New(22,PL_reg_start_tmp, PL_reg_start_tmpl, char*); |
1546 | } |
1547 | |
1548 | /* XXXX What this code is doing here?!!! There should be no need |
1549 | to do this again and again, PL_reglastparen should take care of |
1550 | this! */ |
1551 | sp = prog->startp; |
1552 | ep = prog->endp; |
1553 | if (prog->nparens) { |
1554 | for (i = prog->nparens; i >= 1; i--) { |
1555 | *++sp = -1; |
1556 | *++ep = -1; |
1557 | } |
1558 | } |
1559 | REGCP_SET; |
1560 | if (regmatch(prog->program + 1)) { |
1561 | prog->endp[0] = PL_reginput - PL_bostr; |
1562 | return 1; |
1563 | } |
1564 | REGCP_UNWIND; |
1565 | return 0; |
1566 | } |
1567 | |
1568 | /* |
1569 | - regmatch - main matching routine |
1570 | * |
1571 | * Conceptually the strategy is simple: check to see whether the current |
1572 | * node matches, call self recursively to see whether the rest matches, |
1573 | * and then act accordingly. In practice we make some effort to avoid |
1574 | * recursion, in particular by going through "ordinary" nodes (that don't |
1575 | * need to know whether the rest of the match failed) by a loop instead of |
1576 | * by recursion. |
1577 | */ |
1578 | /* [lwall] I've hoisted the register declarations to the outer block in order to |
1579 | * maybe save a little bit of pushing and popping on the stack. It also takes |
1580 | * advantage of machines that use a register save mask on subroutine entry. |
1581 | */ |
1582 | STATIC I32 /* 0 failure, 1 success */ |
1583 | S_regmatch(pTHX_ regnode *prog) |
1584 | { |
1585 | dTHR; |
1586 | register regnode *scan; /* Current node. */ |
1587 | regnode *next; /* Next node. */ |
1588 | regnode *inner; /* Next node in internal branch. */ |
1589 | register I32 nextchr; /* renamed nextchr - nextchar colides with |
1590 | function of same name */ |
1591 | register I32 n; /* no or next */ |
1592 | register I32 ln; /* len or last */ |
1593 | register char *s; /* operand or save */ |
1594 | register char *locinput = PL_reginput; |
1595 | register I32 c1, c2, paren; /* case fold search, parenth */ |
1596 | int minmod = 0, sw = 0, logical = 0; |
1597 | #ifdef DEBUGGING |
1598 | PL_regindent++; |
1599 | #endif |
1600 | |
1601 | /* Note that nextchr is a byte even in UTF */ |
1602 | nextchr = UCHARAT(locinput); |
1603 | scan = prog; |
1604 | while (scan != NULL) { |
1605 | #define sayNO_L (logical ? (logical = 0, sw = 0, goto cont) : sayNO) |
1606 | #ifdef DEBUGGING |
1607 | # define sayYES goto yes |
1608 | # define sayNO goto no |
7821416a |
1609 | # define sayYES_FINAL goto yes_final |
1610 | # define sayYES_LOUD goto yes_loud |
1611 | # define sayNO_FINAL goto no_final |
1612 | # define sayNO_SILENT goto do_no |
d6a28714 |
1613 | # define saySAME(x) if (x) goto yes; else goto no |
1614 | # define REPORT_CODE_OFF 24 |
1615 | #else |
1616 | # define sayYES return 1 |
1617 | # define sayNO return 0 |
7821416a |
1618 | # define sayYES_FINAL return 1 |
1619 | # define sayYES_LOUD return 1 |
1620 | # define sayNO_FINAL return 0 |
1621 | # define sayNO_SILENT return 0 |
d6a28714 |
1622 | # define saySAME(x) return x |
1623 | #endif |
1624 | DEBUG_r( { |
1625 | SV *prop = sv_newmortal(); |
1626 | int docolor = *PL_colors[0]; |
1627 | int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */ |
1628 | int l = (PL_regeol - locinput > taill ? taill : PL_regeol - locinput); |
1629 | /* The part of the string before starttry has one color |
1630 | (pref0_len chars), between starttry and current |
1631 | position another one (pref_len - pref0_len chars), |
1632 | after the current position the third one. |
1633 | We assume that pref0_len <= pref_len, otherwise we |
1634 | decrease pref0_len. */ |
1635 | int pref_len = (locinput - PL_bostr > (5 + taill) - l |
1636 | ? (5 + taill) - l : locinput - PL_bostr); |
1637 | int pref0_len = pref_len - (locinput - PL_reg_starttry); |
1638 | |
1639 | if (l + pref_len < (5 + taill) && l < PL_regeol - locinput) |
1640 | l = ( PL_regeol - locinput > (5 + taill) - pref_len |
1641 | ? (5 + taill) - pref_len : PL_regeol - locinput); |
1642 | if (pref0_len < 0) |
1643 | pref0_len = 0; |
1644 | if (pref0_len > pref_len) |
1645 | pref0_len = pref_len; |
1646 | regprop(prop, scan); |
1647 | PerlIO_printf(Perl_debug_log, |
1648 | "%4i <%s%.*s%s%s%.*s%s%s%s%.*s%s>%*s|%3d:%*s%s\n", |
1649 | locinput - PL_bostr, |
1650 | PL_colors[4], pref0_len, |
1651 | locinput - pref_len, PL_colors[5], |
1652 | PL_colors[2], pref_len - pref0_len, |
1653 | locinput - pref_len + pref0_len, PL_colors[3], |
1654 | (docolor ? "" : "> <"), |
1655 | PL_colors[0], l, locinput, PL_colors[1], |
1656 | 15 - l - pref_len + 1, |
1657 | "", |
1658 | scan - PL_regprogram, PL_regindent*2, "", |
1659 | SvPVX(prop)); |
1660 | } ); |
1661 | |
1662 | next = scan + NEXT_OFF(scan); |
1663 | if (next == scan) |
1664 | next = NULL; |
1665 | |
1666 | switch (OP(scan)) { |
1667 | case BOL: |
1668 | if (locinput == PL_bostr |
1669 | ? PL_regprev == '\n' |
1670 | : (PL_multiline && |
1671 | (nextchr || locinput < PL_regeol) && locinput[-1] == '\n') ) |
1672 | { |
1673 | /* regtill = regbol; */ |
b8c5462f |
1674 | break; |
1675 | } |
d6a28714 |
1676 | sayNO; |
1677 | case MBOL: |
1678 | if (locinput == PL_bostr |
1679 | ? PL_regprev == '\n' |
1680 | : ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n') ) |
1681 | { |
b8c5462f |
1682 | break; |
1683 | } |
d6a28714 |
1684 | sayNO; |
1685 | case SBOL: |
1686 | if (locinput == PL_regbol && PL_regprev == '\n') |
b8c5462f |
1687 | break; |
d6a28714 |
1688 | sayNO; |
1689 | case GPOS: |
1690 | if (locinput == PL_reg_ganch) |
1691 | break; |
1692 | sayNO; |
1693 | case EOL: |
1694 | if (PL_multiline) |
1695 | goto meol; |
1696 | else |
1697 | goto seol; |
1698 | case MEOL: |
1699 | meol: |
1700 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') |
b8c5462f |
1701 | sayNO; |
b8c5462f |
1702 | break; |
d6a28714 |
1703 | case SEOL: |
1704 | seol: |
1705 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') |
b8c5462f |
1706 | sayNO; |
d6a28714 |
1707 | if (PL_regeol - locinput > 1) |
b8c5462f |
1708 | sayNO; |
b8c5462f |
1709 | break; |
d6a28714 |
1710 | case EOS: |
1711 | if (PL_regeol != locinput) |
b8c5462f |
1712 | sayNO; |
d6a28714 |
1713 | break; |
1714 | case SANYUTF8: |
b8c5462f |
1715 | if (nextchr & 0x80) { |
b8c5462f |
1716 | locinput += PL_utf8skip[nextchr]; |
d6a28714 |
1717 | if (locinput > PL_regeol) |
1718 | sayNO; |
b8c5462f |
1719 | nextchr = UCHARAT(locinput); |
1720 | break; |
1721 | } |
d6a28714 |
1722 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 |
1723 | sayNO; |
b8c5462f |
1724 | nextchr = UCHARAT(++locinput); |
a0d0e21e |
1725 | break; |
d6a28714 |
1726 | case SANY: |
1727 | if (!nextchr && locinput >= PL_regeol) |
b8c5462f |
1728 | sayNO; |
1729 | nextchr = UCHARAT(++locinput); |
b85d18e9 |
1730 | break; |
d6a28714 |
1731 | case ANYUTF8: |
a0ed51b3 |
1732 | if (nextchr & 0x80) { |
b8c5462f |
1733 | locinput += PL_utf8skip[nextchr]; |
d6a28714 |
1734 | if (locinput > PL_regeol) |
1735 | sayNO; |
a0ed51b3 |
1736 | nextchr = UCHARAT(locinput); |
1737 | break; |
1738 | } |
d6a28714 |
1739 | if (!nextchr && locinput >= PL_regeol || nextchr == '\n') |
a0ed51b3 |
1740 | sayNO; |
1741 | nextchr = UCHARAT(++locinput); |
1742 | break; |
d6a28714 |
1743 | case REG_ANY: |
1744 | if (!nextchr && locinput >= PL_regeol || nextchr == '\n') |
4633a7c4 |
1745 | sayNO; |
76e3520e |
1746 | nextchr = UCHARAT(++locinput); |
a0d0e21e |
1747 | break; |
d6a28714 |
1748 | case EXACT: |
cd439c50 |
1749 | s = STRING(scan); |
1750 | ln = STR_LEN(scan); |
d6a28714 |
1751 | /* Inline the first character, for speed. */ |
1752 | if (UCHARAT(s) != nextchr) |
1753 | sayNO; |
1754 | if (PL_regeol - locinput < ln) |
1755 | sayNO; |
1756 | if (ln > 1 && memNE(s, locinput, ln)) |
1757 | sayNO; |
1758 | locinput += ln; |
1759 | nextchr = UCHARAT(locinput); |
1760 | break; |
1761 | case EXACTFL: |
b8c5462f |
1762 | PL_reg_flags |= RF_tainted; |
1763 | /* FALL THROUGH */ |
d6a28714 |
1764 | case EXACTF: |
cd439c50 |
1765 | s = STRING(scan); |
1766 | ln = STR_LEN(scan); |
d6a28714 |
1767 | |
1768 | if (UTF) { |
1769 | char *l = locinput; |
1770 | char *e = s + ln; |
1771 | c1 = OP(scan) == EXACTF; |
1772 | while (s < e) { |
1773 | if (l >= PL_regeol) |
1774 | sayNO; |
1775 | if (utf8_to_uv((U8*)s, 0) != (c1 ? |
1776 | toLOWER_utf8((U8*)l) : |
1777 | toLOWER_LC_utf8((U8*)l))) |
1778 | { |
1779 | sayNO; |
1780 | } |
1781 | s += UTF8SKIP(s); |
1782 | l += UTF8SKIP(l); |
b8c5462f |
1783 | } |
d6a28714 |
1784 | locinput = l; |
a0ed51b3 |
1785 | nextchr = UCHARAT(locinput); |
1786 | break; |
1787 | } |
d6a28714 |
1788 | |
1789 | /* Inline the first character, for speed. */ |
1790 | if (UCHARAT(s) != nextchr && |
1791 | UCHARAT(s) != ((OP(scan) == EXACTF) |
1792 | ? PL_fold : PL_fold_locale)[nextchr]) |
a0ed51b3 |
1793 | sayNO; |
d6a28714 |
1794 | if (PL_regeol - locinput < ln) |
b8c5462f |
1795 | sayNO; |
d6a28714 |
1796 | if (ln > 1 && (OP(scan) == EXACTF |
1797 | ? ibcmp(s, locinput, ln) |
1798 | : ibcmp_locale(s, locinput, ln))) |
4633a7c4 |
1799 | sayNO; |
d6a28714 |
1800 | locinput += ln; |
1801 | nextchr = UCHARAT(locinput); |
a0d0e21e |
1802 | break; |
d6a28714 |
1803 | case ANYOFUTF8: |
cd439c50 |
1804 | s = MASK(scan); |
d6a28714 |
1805 | if (!REGINCLASSUTF8(scan, (U8*)locinput)) |
4633a7c4 |
1806 | sayNO; |
d6a28714 |
1807 | if (locinput >= PL_regeol) |
1808 | sayNO; |
1809 | locinput += PL_utf8skip[nextchr]; |
1810 | nextchr = UCHARAT(locinput); |
1811 | break; |
1812 | case ANYOF: |
cd439c50 |
1813 | s = MASK(scan); |
d6a28714 |
1814 | if (nextchr < 0) |
b8c5462f |
1815 | nextchr = UCHARAT(locinput); |
d6a28714 |
1816 | if (!REGINCLASS(s, nextchr)) |
1817 | sayNO; |
1818 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 |
1819 | sayNO; |
b8c5462f |
1820 | nextchr = UCHARAT(++locinput); |
1821 | break; |
d6a28714 |
1822 | case ALNUML: |
b8c5462f |
1823 | PL_reg_flags |= RF_tainted; |
1824 | /* FALL THROUGH */ |
d6a28714 |
1825 | case ALNUM: |
b8c5462f |
1826 | if (!nextchr) |
4633a7c4 |
1827 | sayNO; |
d6a28714 |
1828 | if (!(OP(scan) == ALNUM |
1829 | ? isALNUM(nextchr) : isALNUM_LC(nextchr))) |
b8c5462f |
1830 | sayNO; |
1831 | nextchr = UCHARAT(++locinput); |
bbce6d69 |
1832 | break; |
d6a28714 |
1833 | case ALNUMLUTF8: |
3280af22 |
1834 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
1835 | /* FALL THROUGH */ |
d6a28714 |
1836 | case ALNUMUTF8: |
b8c5462f |
1837 | if (!nextchr) |
1838 | sayNO; |
1839 | if (nextchr & 0x80) { |
d6a28714 |
1840 | if (!(OP(scan) == ALNUMUTF8 |
1841 | ? swash_fetch(PL_utf8_alnum, (U8*)locinput) |
1842 | : isALNUM_LC_utf8((U8*)locinput))) |
b8c5462f |
1843 | { |
1844 | sayNO; |
a0ed51b3 |
1845 | } |
b8c5462f |
1846 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 |
1847 | nextchr = UCHARAT(locinput); |
1848 | break; |
1849 | } |
d6a28714 |
1850 | if (!(OP(scan) == ALNUMUTF8 |
1851 | ? isALNUM(nextchr) : isALNUM_LC(nextchr))) |
bbce6d69 |
1852 | sayNO; |
b8c5462f |
1853 | nextchr = UCHARAT(++locinput); |
a0d0e21e |
1854 | break; |
d6a28714 |
1855 | case NALNUML: |
b8c5462f |
1856 | PL_reg_flags |= RF_tainted; |
1857 | /* FALL THROUGH */ |
d6a28714 |
1858 | case NALNUM: |
1859 | if (!nextchr && locinput >= PL_regeol) |
a0ed51b3 |
1860 | sayNO; |
d6a28714 |
1861 | if (OP(scan) == NALNUM |
1862 | ? isALNUM(nextchr) : isALNUM_LC(nextchr)) |
a0ed51b3 |
1863 | sayNO; |
b8c5462f |
1864 | nextchr = UCHARAT(++locinput); |
a0ed51b3 |
1865 | break; |
d6a28714 |
1866 | case NALNUMLUTF8: |
b8c5462f |
1867 | PL_reg_flags |= RF_tainted; |
1868 | /* FALL THROUGH */ |
d6a28714 |
1869 | case NALNUMUTF8: |
3280af22 |
1870 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 |
1871 | sayNO; |
b8c5462f |
1872 | if (nextchr & 0x80) { |
d6a28714 |
1873 | if (OP(scan) == NALNUMUTF8 |
1874 | ? swash_fetch(PL_utf8_alnum, (U8*)locinput) |
1875 | : isALNUM_LC_utf8((U8*)locinput)) |
1876 | { |
b8c5462f |
1877 | sayNO; |
d6a28714 |
1878 | } |
b8c5462f |
1879 | locinput += PL_utf8skip[nextchr]; |
1880 | nextchr = UCHARAT(locinput); |
1881 | break; |
1882 | } |
d6a28714 |
1883 | if (OP(scan) == NALNUMUTF8 |
1884 | ? isALNUM(nextchr) : isALNUM_LC(nextchr)) |
b8c5462f |
1885 | sayNO; |
76e3520e |
1886 | nextchr = UCHARAT(++locinput); |
a0d0e21e |
1887 | break; |
d6a28714 |
1888 | case BOUNDL: |
1889 | case NBOUNDL: |
3280af22 |
1890 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
1891 | /* FALL THROUGH */ |
d6a28714 |
1892 | case BOUND: |
1893 | case NBOUND: |
1894 | /* was last char in word? */ |
1895 | ln = (locinput != PL_regbol) ? UCHARAT(locinput - 1) : PL_regprev; |
1896 | if (OP(scan) == BOUND || OP(scan) == NBOUND) { |
1897 | ln = isALNUM(ln); |
1898 | n = isALNUM(nextchr); |
1899 | } |
1900 | else { |
1901 | ln = isALNUM_LC(ln); |
1902 | n = isALNUM_LC(nextchr); |
1903 | } |
1904 | if (((!ln) == (!n)) == (OP(scan) == BOUND || OP(scan) == BOUNDL)) |
4633a7c4 |
1905 | sayNO; |
a0d0e21e |
1906 | break; |
d6a28714 |
1907 | case BOUNDLUTF8: |
1908 | case NBOUNDLUTF8: |
a0ed51b3 |
1909 | PL_reg_flags |= RF_tainted; |
1910 | /* FALL THROUGH */ |
d6a28714 |
1911 | case BOUNDUTF8: |
1912 | case NBOUNDUTF8: |
1913 | /* was last char in word? */ |
1914 | ln = (locinput != PL_regbol) |
1915 | ? utf8_to_uv(reghop((U8*)locinput, -1), 0) : PL_regprev; |
1916 | if (OP(scan) == BOUNDUTF8 || OP(scan) == NBOUNDUTF8) { |
1917 | ln = isALNUM_uni(ln); |
1918 | n = swash_fetch(PL_utf8_alnum, (U8*)locinput); |
a0ed51b3 |
1919 | } |
d6a28714 |
1920 | else { |
1921 | ln = isALNUM_LC_uni(ln); |
1922 | n = isALNUM_LC_utf8((U8*)locinput); |
1923 | } |
1924 | if (((!ln) == (!n)) == (OP(scan) == BOUNDUTF8 || OP(scan) == BOUNDLUTF8)) |
a0ed51b3 |
1925 | sayNO; |
a0ed51b3 |
1926 | break; |
d6a28714 |
1927 | case SPACEL: |
3280af22 |
1928 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
1929 | /* FALL THROUGH */ |
d6a28714 |
1930 | case SPACE: |
1931 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 |
1932 | sayNO; |
d6a28714 |
1933 | if (!(OP(scan) == SPACE |
1934 | ? isSPACE(nextchr) : isSPACE_LC(nextchr))) |
4633a7c4 |
1935 | sayNO; |
76e3520e |
1936 | nextchr = UCHARAT(++locinput); |
a0d0e21e |
1937 | break; |
d6a28714 |
1938 | case SPACELUTF8: |
a0ed51b3 |
1939 | PL_reg_flags |= RF_tainted; |
1940 | /* FALL THROUGH */ |
d6a28714 |
1941 | case SPACEUTF8: |
a0ed51b3 |
1942 | if (!nextchr && locinput >= PL_regeol) |
1943 | sayNO; |
1944 | if (nextchr & 0x80) { |
d6a28714 |
1945 | if (!(OP(scan) == SPACEUTF8 |
1946 | ? swash_fetch(PL_utf8_space,(U8*)locinput) |
1947 | : isSPACE_LC_utf8((U8*)locinput))) |
1948 | { |
a0ed51b3 |
1949 | sayNO; |
d6a28714 |
1950 | } |
6f06b55f |
1951 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 |
1952 | nextchr = UCHARAT(locinput); |
1953 | break; |
1954 | } |
d6a28714 |
1955 | if (!(OP(scan) == SPACEUTF8 |
1956 | ? isSPACE(nextchr) : isSPACE_LC(nextchr))) |
a0ed51b3 |
1957 | sayNO; |
1958 | nextchr = UCHARAT(++locinput); |
1959 | break; |
d6a28714 |
1960 | case NSPACEL: |
3280af22 |
1961 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
1962 | /* FALL THROUGH */ |
d6a28714 |
1963 | case NSPACE: |
b8c5462f |
1964 | if (!nextchr) |
1965 | sayNO; |
d6a28714 |
1966 | if (OP(scan) == SPACE |
1967 | ? isSPACE(nextchr) : isSPACE_LC(nextchr)) |
4633a7c4 |
1968 | sayNO; |
b8c5462f |
1969 | nextchr = UCHARAT(++locinput); |
a0d0e21e |
1970 | break; |
d6a28714 |
1971 | case NSPACELUTF8: |
a0ed51b3 |
1972 | PL_reg_flags |= RF_tainted; |
1973 | /* FALL THROUGH */ |
d6a28714 |
1974 | case NSPACEUTF8: |
b8c5462f |
1975 | if (!nextchr) |
1976 | sayNO; |
1977 | if (nextchr & 0x80) { |
d6a28714 |
1978 | if (OP(scan) == NSPACEUTF8 |
1979 | ? swash_fetch(PL_utf8_space,(U8*)locinput) |
1980 | : isSPACE_LC_utf8((U8*)locinput)) |
b8c5462f |
1981 | { |
1982 | sayNO; |
1983 | } |
1984 | locinput += PL_utf8skip[nextchr]; |
1985 | nextchr = UCHARAT(locinput); |
1986 | break; |
a0ed51b3 |
1987 | } |
d6a28714 |
1988 | if (OP(scan) == NSPACEUTF8 |
1989 | ? isSPACE(nextchr) : isSPACE_LC(nextchr)) |
4633a7c4 |
1990 | sayNO; |
76e3520e |
1991 | nextchr = UCHARAT(++locinput); |
a0d0e21e |
1992 | break; |
d6a28714 |
1993 | case DIGITL: |
a0ed51b3 |
1994 | PL_reg_flags |= RF_tainted; |
1995 | /* FALL THROUGH */ |
d6a28714 |
1996 | case DIGIT: |
a0ed51b3 |
1997 | if (!nextchr && locinput >= PL_regeol) |
1998 | sayNO; |
d6a28714 |
1999 | if (!(OP(scan) == DIGIT |
2000 | ? isDIGIT(nextchr) : isDIGIT_LC(nextchr))) |
4633a7c4 |
2001 | sayNO; |
76e3520e |
2002 | nextchr = UCHARAT(++locinput); |
a0d0e21e |
2003 | break; |
d6a28714 |
2004 | case DIGITLUTF8: |
a0ed51b3 |
2005 | PL_reg_flags |= RF_tainted; |
2006 | /* FALL THROUGH */ |
d6a28714 |
2007 | case DIGITUTF8: |
a0ed51b3 |
2008 | if (!nextchr) |
2009 | sayNO; |
2010 | if (nextchr & 0x80) { |
d6a28714 |
2011 | if (OP(scan) == NDIGITUTF8 |
2012 | ? swash_fetch(PL_utf8_digit,(U8*)locinput) |
2013 | : isDIGIT_LC_utf8((U8*)locinput)) |
dfe13c55 |
2014 | { |
a0ed51b3 |
2015 | sayNO; |
dfe13c55 |
2016 | } |
6f06b55f |
2017 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 |
2018 | nextchr = UCHARAT(locinput); |
2019 | break; |
2020 | } |
d6a28714 |
2021 | if (!isDIGIT(nextchr)) |
a0ed51b3 |
2022 | sayNO; |
2023 | nextchr = UCHARAT(++locinput); |
2024 | break; |
d6a28714 |
2025 | case NDIGITL: |
b8c5462f |
2026 | PL_reg_flags |= RF_tainted; |
2027 | /* FALL THROUGH */ |
d6a28714 |
2028 | case NDIGIT: |
b8c5462f |
2029 | if (!nextchr) |
2030 | sayNO; |
d6a28714 |
2031 | if (OP(scan) == DIGIT |
2032 | ? isDIGIT(nextchr) : isDIGIT_LC(nextchr)) |
4633a7c4 |
2033 | sayNO; |
76e3520e |
2034 | nextchr = UCHARAT(++locinput); |
a0d0e21e |
2035 | break; |
d6a28714 |
2036 | case NDIGITLUTF8: |
b8c5462f |
2037 | PL_reg_flags |= RF_tainted; |
2038 | /* FALL THROUGH */ |
d6a28714 |
2039 | case NDIGITUTF8: |
b8c5462f |
2040 | if (!nextchr && locinput >= PL_regeol) |
2041 | sayNO; |
a0ed51b3 |
2042 | if (nextchr & 0x80) { |
d6a28714 |
2043 | if (swash_fetch(PL_utf8_digit,(U8*)locinput)) |
a0ed51b3 |
2044 | sayNO; |
6f06b55f |
2045 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 |
2046 | nextchr = UCHARAT(locinput); |
2047 | break; |
2048 | } |
d6a28714 |
2049 | if (isDIGIT(nextchr)) |
a0ed51b3 |
2050 | sayNO; |
2051 | nextchr = UCHARAT(++locinput); |
2052 | break; |
2053 | case CLUMP: |
dfe13c55 |
2054 | if (locinput >= PL_regeol || swash_fetch(PL_utf8_mark,(U8*)locinput)) |
a0ed51b3 |
2055 | sayNO; |
6f06b55f |
2056 | locinput += PL_utf8skip[nextchr]; |
dfe13c55 |
2057 | while (locinput < PL_regeol && swash_fetch(PL_utf8_mark,(U8*)locinput)) |
a0ed51b3 |
2058 | locinput += UTF8SKIP(locinput); |
2059 | if (locinput > PL_regeol) |
2060 | sayNO; |
2061 | nextchr = UCHARAT(locinput); |
2062 | break; |
c8756f30 |
2063 | case REFFL: |
3280af22 |
2064 | PL_reg_flags |= RF_tainted; |
c8756f30 |
2065 | /* FALL THROUGH */ |
c277df42 |
2066 | case REF: |
c8756f30 |
2067 | case REFF: |
c277df42 |
2068 | n = ARG(scan); /* which paren pair */ |
cf93c79d |
2069 | ln = PL_regstartp[n]; |
2c2d71f5 |
2070 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
cf93c79d |
2071 | if (*PL_reglastparen < n || ln == -1) |
af3f8c16 |
2072 | sayNO; /* Do not match unless seen CLOSEn. */ |
cf93c79d |
2073 | if (ln == PL_regendp[n]) |
a0d0e21e |
2074 | break; |
a0ed51b3 |
2075 | |
cf93c79d |
2076 | s = PL_bostr + ln; |
a0ed51b3 |
2077 | if (UTF && OP(scan) != REF) { /* REF can do byte comparison */ |
2078 | char *l = locinput; |
cf93c79d |
2079 | char *e = PL_bostr + PL_regendp[n]; |
a0ed51b3 |
2080 | /* |
2081 | * Note that we can't do the "other character" lookup trick as |
2082 | * in the 8-bit case (no pun intended) because in Unicode we |
2083 | * have to map both upper and title case to lower case. |
2084 | */ |
2085 | if (OP(scan) == REFF) { |
2086 | while (s < e) { |
2087 | if (l >= PL_regeol) |
2088 | sayNO; |
dfe13c55 |
2089 | if (toLOWER_utf8((U8*)s) != toLOWER_utf8((U8*)l)) |
a0ed51b3 |
2090 | sayNO; |
2091 | s += UTF8SKIP(s); |
2092 | l += UTF8SKIP(l); |
2093 | } |
2094 | } |
2095 | else { |
2096 | while (s < e) { |
2097 | if (l >= PL_regeol) |
2098 | sayNO; |
dfe13c55 |
2099 | if (toLOWER_LC_utf8((U8*)s) != toLOWER_LC_utf8((U8*)l)) |
a0ed51b3 |
2100 | sayNO; |
2101 | s += UTF8SKIP(s); |
2102 | l += UTF8SKIP(l); |
2103 | } |
2104 | } |
2105 | locinput = l; |
2106 | nextchr = UCHARAT(locinput); |
2107 | break; |
2108 | } |
2109 | |
a0d0e21e |
2110 | /* Inline the first character, for speed. */ |
76e3520e |
2111 | if (UCHARAT(s) != nextchr && |
c8756f30 |
2112 | (OP(scan) == REF || |
2113 | (UCHARAT(s) != ((OP(scan) == REFF |
22c35a8c |
2114 | ? PL_fold : PL_fold_locale)[nextchr])))) |
4633a7c4 |
2115 | sayNO; |
cf93c79d |
2116 | ln = PL_regendp[n] - ln; |
3280af22 |
2117 | if (locinput + ln > PL_regeol) |
4633a7c4 |
2118 | sayNO; |
c8756f30 |
2119 | if (ln > 1 && (OP(scan) == REF |
2120 | ? memNE(s, locinput, ln) |
2121 | : (OP(scan) == REFF |
2122 | ? ibcmp(s, locinput, ln) |
2123 | : ibcmp_locale(s, locinput, ln)))) |
4633a7c4 |
2124 | sayNO; |
a0d0e21e |
2125 | locinput += ln; |
76e3520e |
2126 | nextchr = UCHARAT(locinput); |
a0d0e21e |
2127 | break; |
2128 | |
2129 | case NOTHING: |
c277df42 |
2130 | case TAIL: |
a0d0e21e |
2131 | break; |
2132 | case BACK: |
2133 | break; |
c277df42 |
2134 | case EVAL: |
2135 | { |
2136 | dSP; |
533c011a |
2137 | OP_4tree *oop = PL_op; |
3280af22 |
2138 | COP *ocurcop = PL_curcop; |
2139 | SV **ocurpad = PL_curpad; |
c277df42 |
2140 | SV *ret; |
2141 | |
2142 | n = ARG(scan); |
533c011a |
2143 | PL_op = (OP_4tree*)PL_regdata->data[n]; |
2144 | DEBUG_r( PerlIO_printf(Perl_debug_log, " re_eval 0x%x\n", PL_op) ); |
dfad63ad |
2145 | PL_curpad = AvARRAY((AV*)PL_regdata->data[n + 2]); |
cf93c79d |
2146 | PL_regendp[0] = PL_reg_magic->mg_len = locinput - PL_bostr; |
c277df42 |
2147 | |
cea2e8a9 |
2148 | CALLRUNOPS(aTHX); /* Scalar context. */ |
c277df42 |
2149 | SPAGAIN; |
2150 | ret = POPs; |
2151 | PUTBACK; |
2152 | |
0f5d15d6 |
2153 | PL_op = oop; |
2154 | PL_curpad = ocurpad; |
2155 | PL_curcop = ocurcop; |
c277df42 |
2156 | if (logical) { |
0f5d15d6 |
2157 | if (logical == 2) { /* Postponed subexpression. */ |
2158 | regexp *re; |
22c35a8c |
2159 | MAGIC *mg = Null(MAGIC*); |
0f5d15d6 |
2160 | re_cc_state state; |
0f5d15d6 |
2161 | CHECKPOINT cp, lastcp; |
2162 | |
2163 | if(SvROK(ret) || SvRMAGICAL(ret)) { |
2164 | SV *sv = SvROK(ret) ? SvRV(ret) : ret; |
2165 | |
2166 | if(SvMAGICAL(sv)) |
2167 | mg = mg_find(sv, 'r'); |
2168 | } |
2169 | if (mg) { |
2170 | re = (regexp *)mg->mg_obj; |
df0003d4 |
2171 | (void)ReREFCNT_inc(re); |
0f5d15d6 |
2172 | } |
2173 | else { |
2174 | STRLEN len; |
2175 | char *t = SvPV(ret, len); |
2176 | PMOP pm; |
2177 | char *oprecomp = PL_regprecomp; |
2178 | I32 osize = PL_regsize; |
2179 | I32 onpar = PL_regnpar; |
2180 | |
2181 | pm.op_pmflags = 0; |
cea2e8a9 |
2182 | re = CALLREGCOMP(aTHX_ t, t + len, &pm); |
0f5d15d6 |
2183 | if (!(SvFLAGS(ret) |
2184 | & (SVs_TEMP | SVs_PADTMP | SVf_READONLY))) |
2185 | sv_magic(ret,(SV*)ReREFCNT_inc(re),'r',0,0); |
2186 | PL_regprecomp = oprecomp; |
2187 | PL_regsize = osize; |
2188 | PL_regnpar = onpar; |
2189 | } |
2190 | DEBUG_r( |
2191 | PerlIO_printf(Perl_debug_log, |
2192 | "Entering embedded `%s%.60s%s%s'\n", |
2193 | PL_colors[0], |
2194 | re->precomp, |
2195 | PL_colors[1], |
2196 | (strlen(re->precomp) > 60 ? "..." : "")) |
2197 | ); |
2198 | state.node = next; |
2199 | state.prev = PL_reg_call_cc; |
2200 | state.cc = PL_regcc; |
2201 | state.re = PL_reg_re; |
2202 | |
2ab05381 |
2203 | PL_regcc = 0; |
0f5d15d6 |
2204 | |
2205 | cp = regcppush(0); /* Save *all* the positions. */ |
2206 | REGCP_SET; |
2207 | cache_re(re); |
2208 | state.ss = PL_savestack_ix; |
2209 | *PL_reglastparen = 0; |
2210 | PL_reg_call_cc = &state; |
2211 | PL_reginput = locinput; |
2c2d71f5 |
2212 | |
2213 | /* XXXX This is too dramatic a measure... */ |
2214 | PL_reg_maxiter = 0; |
2215 | |
0f5d15d6 |
2216 | if (regmatch(re->program + 1)) { |
2c914db6 |
2217 | /* Even though we succeeded, we need to restore |
2218 | global variables, since we may be wrapped inside |
2219 | SUSPEND, thus the match may be not finished yet. */ |
2220 | |
2221 | /* XXXX Do this only if SUSPENDed? */ |
2222 | PL_reg_call_cc = state.prev; |
2223 | PL_regcc = state.cc; |
2224 | PL_reg_re = state.re; |
2225 | cache_re(PL_reg_re); |
2226 | |
2227 | /* XXXX This is too dramatic a measure... */ |
2228 | PL_reg_maxiter = 0; |
2229 | |
2230 | /* These are needed even if not SUSPEND. */ |
0f5d15d6 |
2231 | ReREFCNT_dec(re); |
2232 | regcpblow(cp); |
2233 | sayYES; |
2234 | } |
0f5d15d6 |
2235 | ReREFCNT_dec(re); |
2236 | REGCP_UNWIND; |
2237 | regcppop(); |
2238 | PL_reg_call_cc = state.prev; |
2239 | PL_regcc = state.cc; |
2240 | PL_reg_re = state.re; |
d3790889 |
2241 | cache_re(PL_reg_re); |
2c2d71f5 |
2242 | |
2243 | /* XXXX This is too dramatic a measure... */ |
2244 | PL_reg_maxiter = 0; |
2245 | |
0f5d15d6 |
2246 | sayNO; |
2247 | } |
c277df42 |
2248 | sw = SvTRUE(ret); |
0f5d15d6 |
2249 | logical = 0; |
a0ed51b3 |
2250 | } |
2251 | else |
3280af22 |
2252 | sv_setsv(save_scalar(PL_replgv), ret); |
c277df42 |
2253 | break; |
2254 | } |
a0d0e21e |
2255 | case OPEN: |
c277df42 |
2256 | n = ARG(scan); /* which paren pair */ |
3280af22 |
2257 | PL_reg_start_tmp[n] = locinput; |
2258 | if (n > PL_regsize) |
2259 | PL_regsize = n; |
a0d0e21e |
2260 | break; |
2261 | case CLOSE: |
c277df42 |
2262 | n = ARG(scan); /* which paren pair */ |
cf93c79d |
2263 | PL_regstartp[n] = PL_reg_start_tmp[n] - PL_bostr; |
2264 | PL_regendp[n] = locinput - PL_bostr; |
3280af22 |
2265 | if (n > *PL_reglastparen) |
2266 | *PL_reglastparen = n; |
a0d0e21e |
2267 | break; |
c277df42 |
2268 | case GROUPP: |
2269 | n = ARG(scan); /* which paren pair */ |
cf93c79d |
2270 | sw = (*PL_reglastparen >= n && PL_regendp[n] != -1); |
c277df42 |
2271 | break; |
2272 | case IFTHEN: |
2c2d71f5 |
2273 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
c277df42 |
2274 | if (sw) |
2275 | next = NEXTOPER(NEXTOPER(scan)); |
2276 | else { |
2277 | next = scan + ARG(scan); |
2278 | if (OP(next) == IFTHEN) /* Fake one. */ |
2279 | next = NEXTOPER(NEXTOPER(next)); |
2280 | } |
2281 | break; |
2282 | case LOGICAL: |
0f5d15d6 |
2283 | logical = scan->flags; |
c277df42 |
2284 | break; |
2ab05381 |
2285 | /******************************************************************* |
2286 | PL_regcc contains infoblock about the innermost (...)* loop, and |
2287 | a pointer to the next outer infoblock. |
2288 | |
2289 | Here is how Y(A)*Z is processed (if it is compiled into CURLYX/WHILEM): |
2290 | |
2291 | 1) After matching X, regnode for CURLYX is processed; |
2292 | |
2293 | 2) This regnode creates infoblock on the stack, and calls |
2294 | regmatch() recursively with the starting point at WHILEM node; |
2295 | |
2296 | 3) Each hit of WHILEM node tries to match A and Z (in the order |
2297 | depending on the current iteration, min/max of {min,max} and |
2298 | greediness). The information about where are nodes for "A" |
2299 | and "Z" is read from the infoblock, as is info on how many times "A" |
2300 | was already matched, and greediness. |
2301 | |
2302 | 4) After A matches, the same WHILEM node is hit again. |
2303 | |
2304 | 5) Each time WHILEM is hit, PL_regcc is the infoblock created by CURLYX |
2305 | of the same pair. Thus when WHILEM tries to match Z, it temporarily |
2306 | resets PL_regcc, since this Y(A)*Z can be a part of some other loop: |
2307 | as in (Y(A)*Z)*. If Z matches, the automaton will hit the WHILEM node |
2308 | of the external loop. |
2309 | |
2310 | Currently present infoblocks form a tree with a stem formed by PL_curcc |
2311 | and whatever it mentions via ->next, and additional attached trees |
2312 | corresponding to temporarily unset infoblocks as in "5" above. |
2313 | |
2314 | In the following picture infoblocks for outer loop of |
2315 | (Y(A)*?Z)*?T are denoted O, for inner I. NULL starting block |
2316 | is denoted by x. The matched string is YAAZYAZT. Temporarily postponed |
2317 | infoblocks are drawn below the "reset" infoblock. |
2318 | |
2319 | In fact in the picture below we do not show failed matches for Z and T |
2320 | by WHILEM blocks. [We illustrate minimal matches, since for them it is |
2321 | more obvious *why* one needs to *temporary* unset infoblocks.] |
2322 | |
2323 | Matched REx position InfoBlocks Comment |
2324 | (Y(A)*?Z)*?T x |
2325 | Y(A)*?Z)*?T x <- O |
2326 | Y (A)*?Z)*?T x <- O |
2327 | Y A)*?Z)*?T x <- O <- I |
2328 | YA )*?Z)*?T x <- O <- I |
2329 | YA A)*?Z)*?T x <- O <- I |
2330 | YAA )*?Z)*?T x <- O <- I |
2331 | YAA Z)*?T x <- O # Temporary unset I |
2332 | I |
2333 | |
2334 | YAAZ Y(A)*?Z)*?T x <- O |
2335 | I |
2336 | |
2337 | YAAZY (A)*?Z)*?T x <- O |
2338 | I |
2339 | |
2340 | YAAZY A)*?Z)*?T x <- O <- I |
2341 | I |
2342 | |
2343 | YAAZYA )*?Z)*?T x <- O <- I |
2344 | I |
2345 | |
2346 | YAAZYA Z)*?T x <- O # Temporary unset I |
2347 | I,I |
2348 | |
2349 | YAAZYAZ )*?T x <- O |
2350 | I,I |
2351 | |
2352 | YAAZYAZ T x # Temporary unset O |
2353 | O |
2354 | I,I |
2355 | |
2356 | YAAZYAZT x |
2357 | O |
2358 | I,I |
2359 | *******************************************************************/ |
a0d0e21e |
2360 | case CURLYX: { |
2361 | CURCUR cc; |
3280af22 |
2362 | CHECKPOINT cp = PL_savestack_ix; |
c277df42 |
2363 | |
2364 | if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */ |
2365 | next += ARG(next); |
3280af22 |
2366 | cc.oldcc = PL_regcc; |
2367 | PL_regcc = &cc; |
2368 | cc.parenfloor = *PL_reglastparen; |
a0d0e21e |
2369 | cc.cur = -1; |
2370 | cc.min = ARG1(scan); |
2371 | cc.max = ARG2(scan); |
c277df42 |
2372 | cc.scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS; |
a0d0e21e |
2373 | cc.next = next; |
2374 | cc.minmod = minmod; |
2375 | cc.lastloc = 0; |
3280af22 |
2376 | PL_reginput = locinput; |
a0d0e21e |
2377 | n = regmatch(PREVOPER(next)); /* start on the WHILEM */ |
2378 | regcpblow(cp); |
3280af22 |
2379 | PL_regcc = cc.oldcc; |
4633a7c4 |
2380 | saySAME(n); |
a0d0e21e |
2381 | } |
2382 | /* NOT REACHED */ |
2383 | case WHILEM: { |
2384 | /* |
2385 | * This is really hard to understand, because after we match |
2386 | * what we're trying to match, we must make sure the rest of |
2c2d71f5 |
2387 | * the REx is going to match for sure, and to do that we have |
a0d0e21e |
2388 | * to go back UP the parse tree by recursing ever deeper. And |
2389 | * if it fails, we have to reset our parent's current state |
2390 | * that we can try again after backing off. |
2391 | */ |
2392 | |
c277df42 |
2393 | CHECKPOINT cp, lastcp; |
3280af22 |
2394 | CURCUR* cc = PL_regcc; |
c277df42 |
2395 | char *lastloc = cc->lastloc; /* Detection of 0-len. */ |
2396 | |
4633a7c4 |
2397 | n = cc->cur + 1; /* how many we know we matched */ |
3280af22 |
2398 | PL_reginput = locinput; |
a0d0e21e |
2399 | |
c277df42 |
2400 | DEBUG_r( |
2401 | PerlIO_printf(Perl_debug_log, |
2402 | "%*s %ld out of %ld..%ld cc=%lx\n", |
3280af22 |
2403 | REPORT_CODE_OFF+PL_regindent*2, "", |
c277df42 |
2404 | (long)n, (long)cc->min, |
2405 | (long)cc->max, (long)cc) |
2406 | ); |
4633a7c4 |
2407 | |
a0d0e21e |
2408 | /* If degenerate scan matches "", assume scan done. */ |
2409 | |
579cf2c3 |
2410 | if (locinput == cc->lastloc && n >= cc->min) { |
3280af22 |
2411 | PL_regcc = cc->oldcc; |
2ab05381 |
2412 | if (PL_regcc) |
2413 | ln = PL_regcc->cur; |
c277df42 |
2414 | DEBUG_r( |
c3464db5 |
2415 | PerlIO_printf(Perl_debug_log, |
2416 | "%*s empty match detected, try continuation...\n", |
3280af22 |
2417 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 |
2418 | ); |
a0d0e21e |
2419 | if (regmatch(cc->next)) |
4633a7c4 |
2420 | sayYES; |
2ab05381 |
2421 | if (PL_regcc) |
2422 | PL_regcc->cur = ln; |
3280af22 |
2423 | PL_regcc = cc; |
4633a7c4 |
2424 | sayNO; |
a0d0e21e |
2425 | } |
2426 | |
2427 | /* First just match a string of min scans. */ |
2428 | |
2429 | if (n < cc->min) { |
2430 | cc->cur = n; |
2431 | cc->lastloc = locinput; |
4633a7c4 |
2432 | if (regmatch(cc->scan)) |
2433 | sayYES; |
2434 | cc->cur = n - 1; |
c277df42 |
2435 | cc->lastloc = lastloc; |
4633a7c4 |
2436 | sayNO; |
a0d0e21e |
2437 | } |
2438 | |
2c2d71f5 |
2439 | if (scan->flags) { |
2440 | /* Check whether we already were at this position. |
2441 | Postpone detection until we know the match is not |
2442 | *that* much linear. */ |
2443 | if (!PL_reg_maxiter) { |
2444 | PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4); |
2445 | PL_reg_leftiter = PL_reg_maxiter; |
2446 | } |
2447 | if (PL_reg_leftiter-- == 0) { |
2448 | I32 size = (PL_reg_maxiter + 7)/8; |
2449 | if (PL_reg_poscache) { |
2450 | if (PL_reg_poscache_size < size) { |
2451 | Renew(PL_reg_poscache, size, char); |
2452 | PL_reg_poscache_size = size; |
2453 | } |
2454 | Zero(PL_reg_poscache, size, char); |
2455 | } |
2456 | else { |
2457 | PL_reg_poscache_size = size; |
2458 | Newz(29, PL_reg_poscache, size, char); |
2459 | } |
2460 | DEBUG_r( |
2461 | PerlIO_printf(Perl_debug_log, |
2462 | "%sDetected a super-linear match, switching on caching%s...\n", |
2463 | PL_colors[4], PL_colors[5]) |
2464 | ); |
2465 | } |
2466 | if (PL_reg_leftiter < 0) { |
2467 | I32 o = locinput - PL_bostr, b; |
2468 | |
2469 | o = (scan->flags & 0xf) - 1 + o * (scan->flags>>4); |
2470 | b = o % 8; |
2471 | o /= 8; |
2472 | if (PL_reg_poscache[o] & (1<<b)) { |
2473 | DEBUG_r( |
2474 | PerlIO_printf(Perl_debug_log, |
2475 | "%*s already tried at this position...\n", |
2476 | REPORT_CODE_OFF+PL_regindent*2, "") |
2477 | ); |
7821416a |
2478 | sayNO_SILENT; |
2c2d71f5 |
2479 | } |
2480 | PL_reg_poscache[o] |= (1<<b); |
2481 | } |
2482 | } |
2483 | |
a0d0e21e |
2484 | /* Prefer next over scan for minimal matching. */ |
2485 | |
2486 | if (cc->minmod) { |
3280af22 |
2487 | PL_regcc = cc->oldcc; |
2ab05381 |
2488 | if (PL_regcc) |
2489 | ln = PL_regcc->cur; |
5f05dabc |
2490 | cp = regcppush(cc->parenfloor); |
c277df42 |
2491 | REGCP_SET; |
5f05dabc |
2492 | if (regmatch(cc->next)) { |
c277df42 |
2493 | regcpblow(cp); |
4633a7c4 |
2494 | sayYES; /* All done. */ |
5f05dabc |
2495 | } |
c277df42 |
2496 | REGCP_UNWIND; |
5f05dabc |
2497 | regcppop(); |
2ab05381 |
2498 | if (PL_regcc) |
2499 | PL_regcc->cur = ln; |
3280af22 |
2500 | PL_regcc = cc; |
a0d0e21e |
2501 | |
c277df42 |
2502 | if (n >= cc->max) { /* Maximum greed exceeded? */ |
599cee73 |
2503 | if (ckWARN(WARN_UNSAFE) && n >= REG_INFTY |
3280af22 |
2504 | && !(PL_reg_flags & RF_warned)) { |
2505 | PL_reg_flags |= RF_warned; |
cea2e8a9 |
2506 | Perl_warner(aTHX_ WARN_UNSAFE, "%s limit (%d) exceeded", |
2f3ca594 |
2507 | "Complex regular subexpression recursion", |
2508 | REG_INFTY - 1); |
c277df42 |
2509 | } |
4633a7c4 |
2510 | sayNO; |
c277df42 |
2511 | } |
a687059c |
2512 | |
c277df42 |
2513 | DEBUG_r( |
c3464db5 |
2514 | PerlIO_printf(Perl_debug_log, |
2515 | "%*s trying longer...\n", |
3280af22 |
2516 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 |
2517 | ); |
a0d0e21e |
2518 | /* Try scanning more and see if it helps. */ |
3280af22 |
2519 | PL_reginput = locinput; |
a0d0e21e |
2520 | cc->cur = n; |
2521 | cc->lastloc = locinput; |
5f05dabc |
2522 | cp = regcppush(cc->parenfloor); |
c277df42 |
2523 | REGCP_SET; |
5f05dabc |
2524 | if (regmatch(cc->scan)) { |
c277df42 |
2525 | regcpblow(cp); |
4633a7c4 |
2526 | sayYES; |
5f05dabc |
2527 | } |
c277df42 |
2528 | REGCP_UNWIND; |
5f05dabc |
2529 | regcppop(); |
4633a7c4 |
2530 | cc->cur = n - 1; |
c277df42 |
2531 | cc->lastloc = lastloc; |
4633a7c4 |
2532 | sayNO; |
a0d0e21e |
2533 | } |
2534 | |
2535 | /* Prefer scan over next for maximal matching. */ |
2536 | |
2537 | if (n < cc->max) { /* More greed allowed? */ |
5f05dabc |
2538 | cp = regcppush(cc->parenfloor); |
a0d0e21e |
2539 | cc->cur = n; |
2540 | cc->lastloc = locinput; |
c277df42 |
2541 | REGCP_SET; |
5f05dabc |
2542 | if (regmatch(cc->scan)) { |
c277df42 |
2543 | regcpblow(cp); |
4633a7c4 |
2544 | sayYES; |
5f05dabc |
2545 | } |
c277df42 |
2546 | REGCP_UNWIND; |
a0d0e21e |
2547 | regcppop(); /* Restore some previous $<digit>s? */ |
3280af22 |
2548 | PL_reginput = locinput; |
c277df42 |
2549 | DEBUG_r( |
c3464db5 |
2550 | PerlIO_printf(Perl_debug_log, |
2551 | "%*s failed, try continuation...\n", |
3280af22 |
2552 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 |
2553 | ); |
2554 | } |
599cee73 |
2555 | if (ckWARN(WARN_UNSAFE) && n >= REG_INFTY |
2556 | && !(PL_reg_flags & RF_warned)) { |
3280af22 |
2557 | PL_reg_flags |= RF_warned; |
cea2e8a9 |
2558 | Perl_warner(aTHX_ WARN_UNSAFE, "%s limit (%d) exceeded", |
cb5d145d |
2559 | "Complex regular subexpression recursion", |
2560 | REG_INFTY - 1); |
a0d0e21e |
2561 | } |
2562 | |
2563 | /* Failed deeper matches of scan, so see if this one works. */ |
3280af22 |
2564 | PL_regcc = cc->oldcc; |
2ab05381 |
2565 | if (PL_regcc) |
2566 | ln = PL_regcc->cur; |
a0d0e21e |
2567 | if (regmatch(cc->next)) |
4633a7c4 |
2568 | sayYES; |
2ab05381 |
2569 | if (PL_regcc) |
2570 | PL_regcc->cur = ln; |
3280af22 |
2571 | PL_regcc = cc; |
4633a7c4 |
2572 | cc->cur = n - 1; |
c277df42 |
2573 | cc->lastloc = lastloc; |
4633a7c4 |
2574 | sayNO; |
a0d0e21e |
2575 | } |
2576 | /* NOT REACHED */ |
c277df42 |
2577 | case BRANCHJ: |
2578 | next = scan + ARG(scan); |
2579 | if (next == scan) |
2580 | next = NULL; |
2581 | inner = NEXTOPER(NEXTOPER(scan)); |
2582 | goto do_branch; |
2583 | case BRANCH: |
2584 | inner = NEXTOPER(scan); |
2585 | do_branch: |
2586 | { |
2587 | CHECKPOINT lastcp; |
2588 | c1 = OP(scan); |
2589 | if (OP(next) != c1) /* No choice. */ |
2590 | next = inner; /* Avoid recursion. */ |
a0d0e21e |
2591 | else { |
3280af22 |
2592 | int lastparen = *PL_reglastparen; |
c277df42 |
2593 | |
2594 | REGCP_SET; |
a0d0e21e |
2595 | do { |
3280af22 |
2596 | PL_reginput = locinput; |
c277df42 |
2597 | if (regmatch(inner)) |
4633a7c4 |
2598 | sayYES; |
c277df42 |
2599 | REGCP_UNWIND; |
3280af22 |
2600 | for (n = *PL_reglastparen; n > lastparen; n--) |
cf93c79d |
2601 | PL_regendp[n] = -1; |
3280af22 |
2602 | *PL_reglastparen = n; |
c277df42 |
2603 | scan = next; |
a0d0e21e |
2604 | /*SUPPRESS 560*/ |
c277df42 |
2605 | if (n = (c1 == BRANCH ? NEXT_OFF(next) : ARG(next))) |
2606 | next += n; |
a0d0e21e |
2607 | else |
c277df42 |
2608 | next = NULL; |
c277df42 |
2609 | inner = NEXTOPER(scan); |
2610 | if (c1 == BRANCHJ) { |
2611 | inner = NEXTOPER(inner); |
2612 | } |
2613 | } while (scan != NULL && OP(scan) == c1); |
4633a7c4 |
2614 | sayNO; |
a0d0e21e |
2615 | /* NOTREACHED */ |
a687059c |
2616 | } |
a0d0e21e |
2617 | } |
2618 | break; |
2619 | case MINMOD: |
2620 | minmod = 1; |
2621 | break; |
c277df42 |
2622 | case CURLYM: |
2623 | { |
00db4c45 |
2624 | I32 l = 0; |
c277df42 |
2625 | CHECKPOINT lastcp; |
2626 | |
2627 | /* We suppose that the next guy does not need |
2628 | backtracking: in particular, it is of constant length, |
2629 | and has no parenths to influence future backrefs. */ |
2630 | ln = ARG1(scan); /* min to match */ |
2631 | n = ARG2(scan); /* max to match */ |
c277df42 |
2632 | paren = scan->flags; |
2633 | if (paren) { |
3280af22 |
2634 | if (paren > PL_regsize) |
2635 | PL_regsize = paren; |
2636 | if (paren > *PL_reglastparen) |
2637 | *PL_reglastparen = paren; |
c277df42 |
2638 | } |
dc45a647 |
2639 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
c277df42 |
2640 | if (paren) |
2641 | scan += NEXT_OFF(scan); /* Skip former OPEN. */ |
3280af22 |
2642 | PL_reginput = locinput; |
c277df42 |
2643 | if (minmod) { |
2644 | minmod = 0; |
2645 | if (ln && regrepeat_hard(scan, ln, &l) < ln) |
2646 | sayNO; |
5f4b28b2 |
2647 | if (ln && l == 0 && n >= ln |
c277df42 |
2648 | /* In fact, this is tricky. If paren, then the |
2649 | fact that we did/didnot match may influence |
2650 | future execution. */ |
2651 | && !(paren && ln == 0)) |
2652 | ln = n; |
3280af22 |
2653 | locinput = PL_reginput; |
22c35a8c |
2654 | if (PL_regkind[(U8)OP(next)] == EXACT) { |
cd439c50 |
2655 | c1 = (U8)*STRING(next); |
c277df42 |
2656 | if (OP(next) == EXACTF) |
22c35a8c |
2657 | c2 = PL_fold[c1]; |
c277df42 |
2658 | else if (OP(next) == EXACTFL) |
22c35a8c |
2659 | c2 = PL_fold_locale[c1]; |
c277df42 |
2660 | else |
2661 | c2 = c1; |
a0ed51b3 |
2662 | } |
2663 | else |
c277df42 |
2664 | c1 = c2 = -1000; |
2665 | REGCP_SET; |
5f4b28b2 |
2666 | /* This may be improved if l == 0. */ |
c277df42 |
2667 | while (n >= ln || (n == REG_INFTY && ln > 0 && l)) { /* ln overflow ? */ |
2668 | /* If it could work, try it. */ |
2669 | if (c1 == -1000 || |
3280af22 |
2670 | UCHARAT(PL_reginput) == c1 || |
2671 | UCHARAT(PL_reginput) == c2) |
c277df42 |
2672 | { |
2673 | if (paren) { |
2674 | if (n) { |
cf93c79d |
2675 | PL_regstartp[paren] = |
2676 | HOPc(PL_reginput, -l) - PL_bostr; |
2677 | PL_regendp[paren] = PL_reginput - PL_bostr; |
a0ed51b3 |
2678 | } |
2679 | else |
cf93c79d |
2680 | PL_regendp[paren] = -1; |
c277df42 |
2681 | } |
2682 | if (regmatch(next)) |
2683 | sayYES; |
2684 | REGCP_UNWIND; |
2685 | } |
2686 | /* Couldn't or didn't -- move forward. */ |
3280af22 |
2687 | PL_reginput = locinput; |
c277df42 |
2688 | if (regrepeat_hard(scan, 1, &l)) { |
2689 | ln++; |
3280af22 |
2690 | locinput = PL_reginput; |
c277df42 |
2691 | } |
2692 | else |
2693 | sayNO; |
2694 | } |
a0ed51b3 |
2695 | } |
2696 | else { |
c277df42 |
2697 | n = regrepeat_hard(scan, n, &l); |
2698 | if (n != 0 && l == 0 |
2699 | /* In fact, this is tricky. If paren, then the |
2700 | fact that we did/didnot match may influence |
2701 | future execution. */ |
2702 | && !(paren && ln == 0)) |
2703 | ln = n; |
3280af22 |
2704 | locinput = PL_reginput; |
c277df42 |
2705 | DEBUG_r( |
5c0ca799 |
2706 | PerlIO_printf(Perl_debug_log, |
2707 | "%*s matched %ld times, len=%ld...\n", |
3280af22 |
2708 | REPORT_CODE_OFF+PL_regindent*2, "", n, l) |
c277df42 |
2709 | ); |
2710 | if (n >= ln) { |
22c35a8c |
2711 | if (PL_regkind[(U8)OP(next)] == EXACT) { |
cd439c50 |
2712 | c1 = (U8)*STRING(next); |
c277df42 |
2713 | if (OP(next) == EXACTF) |
22c35a8c |
2714 | c2 = PL_fold[c1]; |
c277df42 |
2715 | else if (OP(next) == EXACTFL) |
22c35a8c |
2716 | c2 = PL_fold_locale[c1]; |
c277df42 |
2717 | else |
2718 | c2 = c1; |
a0ed51b3 |
2719 | } |
2720 | else |
c277df42 |
2721 | c1 = c2 = -1000; |
2722 | } |
2723 | REGCP_SET; |
2724 | while (n >= ln) { |
2725 | /* If it could work, try it. */ |
2726 | if (c1 == -1000 || |
3280af22 |
2727 | UCHARAT(PL_reginput) == c1 || |
2728 | UCHARAT(PL_reginput) == c2) |
a0ed51b3 |
2729 | { |
2730 | DEBUG_r( |
c3464db5 |
2731 | PerlIO_printf(Perl_debug_log, |
2732 | "%*s trying tail with n=%ld...\n", |
3280af22 |
2733 | REPORT_CODE_OFF+PL_regindent*2, "", n) |
a0ed51b3 |
2734 | ); |
2735 | if (paren) { |
2736 | if (n) { |
cf93c79d |
2737 | PL_regstartp[paren] = HOPc(PL_reginput, -l) - PL_bostr; |
2738 | PL_regendp[paren] = PL_reginput - PL_bostr; |
c277df42 |
2739 | } |
a0ed51b3 |
2740 | else |
cf93c79d |
2741 | PL_regendp[paren] = -1; |
c277df42 |
2742 | } |
a0ed51b3 |
2743 | if (regmatch(next)) |
2744 | sayYES; |
2745 | REGCP_UNWIND; |
2746 | } |
c277df42 |
2747 | /* Couldn't or didn't -- back up. */ |
2748 | n--; |
dfe13c55 |
2749 | locinput = HOPc(locinput, -l); |
3280af22 |
2750 | PL_reginput = locinput; |
c277df42 |
2751 | } |
2752 | } |
2753 | sayNO; |
2754 | break; |
2755 | } |
2756 | case CURLYN: |
2757 | paren = scan->flags; /* Which paren to set */ |
3280af22 |
2758 | if (paren > PL_regsize) |
2759 | PL_regsize = paren; |
2760 | if (paren > *PL_reglastparen) |
2761 | *PL_reglastparen = paren; |
c277df42 |
2762 | ln = ARG1(scan); /* min to match */ |
2763 | n = ARG2(scan); /* max to match */ |
dc45a647 |
2764 | scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE); |
c277df42 |
2765 | goto repeat; |
a0d0e21e |
2766 | case CURLY: |
c277df42 |
2767 | paren = 0; |
a0d0e21e |
2768 | ln = ARG1(scan); /* min to match */ |
2769 | n = ARG2(scan); /* max to match */ |
dc45a647 |
2770 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
a0d0e21e |
2771 | goto repeat; |
2772 | case STAR: |
2773 | ln = 0; |
c277df42 |
2774 | n = REG_INFTY; |
a0d0e21e |
2775 | scan = NEXTOPER(scan); |
c277df42 |
2776 | paren = 0; |
a0d0e21e |
2777 | goto repeat; |
2778 | case PLUS: |
c277df42 |
2779 | ln = 1; |
2780 | n = REG_INFTY; |
2781 | scan = NEXTOPER(scan); |
2782 | paren = 0; |
2783 | repeat: |
a0d0e21e |
2784 | /* |
2785 | * Lookahead to avoid useless match attempts |
2786 | * when we know what character comes next. |
2787 | */ |
22c35a8c |
2788 | if (PL_regkind[(U8)OP(next)] == EXACT) { |
cd439c50 |
2789 | c1 = (U8)*STRING(next); |
bbce6d69 |
2790 | if (OP(next) == EXACTF) |
22c35a8c |
2791 | c2 = PL_fold[c1]; |
bbce6d69 |
2792 | else if (OP(next) == EXACTFL) |
22c35a8c |
2793 | c2 = PL_fold_locale[c1]; |
bbce6d69 |
2794 | else |
2795 | c2 = c1; |
2796 | } |
a0d0e21e |
2797 | else |
bbce6d69 |
2798 | c1 = c2 = -1000; |
3280af22 |
2799 | PL_reginput = locinput; |
a0d0e21e |
2800 | if (minmod) { |
c277df42 |
2801 | CHECKPOINT lastcp; |
a0d0e21e |
2802 | minmod = 0; |
2803 | if (ln && regrepeat(scan, ln) < ln) |
4633a7c4 |
2804 | sayNO; |
a0ed51b3 |
2805 | locinput = PL_reginput; |
c277df42 |
2806 | REGCP_SET; |
0fe9bf95 |
2807 | if (c1 != -1000) { |
2808 | char *e = locinput + n - ln; /* Should not check after this */ |
2809 | char *old = locinput; |
2810 | |
2811 | if (e >= PL_regeol || (n == REG_INFTY)) |
2812 | e = PL_regeol - 1; |
2813 | while (1) { |
2814 | /* Find place 'next' could work */ |
2815 | if (c1 == c2) { |
2816 | while (locinput <= e && *locinput != c1) |
2817 | locinput++; |
2818 | } else { |
2819 | while (locinput <= e |
2820 | && *locinput != c1 |
2821 | && *locinput != c2) |
2822 | locinput++; |
2823 | } |
2824 | if (locinput > e) |
2825 | sayNO; |
2826 | /* PL_reginput == old now */ |
2827 | if (locinput != old) { |
2828 | ln = 1; /* Did some */ |
2829 | if (regrepeat(scan, locinput - old) < |
2830 | locinput - old) |
2831 | sayNO; |
2832 | } |
2833 | /* PL_reginput == locinput now */ |
2834 | if (paren) { |
2835 | if (ln) { |
cf93c79d |
2836 | PL_regstartp[paren] = HOPc(locinput, -1) - PL_bostr; |
2837 | PL_regendp[paren] = locinput - PL_bostr; |
0fe9bf95 |
2838 | } |
2839 | else |
cf93c79d |
2840 | PL_regendp[paren] = -1; |
0fe9bf95 |
2841 | } |
2842 | if (regmatch(next)) |
2843 | sayYES; |
2844 | PL_reginput = locinput; /* Could be reset... */ |
2845 | REGCP_UNWIND; |
2846 | /* Couldn't or didn't -- move forward. */ |
2847 | old = locinput++; |
2848 | } |
2849 | } |
2850 | else |
c277df42 |
2851 | while (n >= ln || (n == REG_INFTY && ln > 0)) { /* ln overflow ? */ |
a0d0e21e |
2852 | /* If it could work, try it. */ |
bbce6d69 |
2853 | if (c1 == -1000 || |
3280af22 |
2854 | UCHARAT(PL_reginput) == c1 || |
2855 | UCHARAT(PL_reginput) == c2) |
bbce6d69 |
2856 | { |
c277df42 |
2857 | if (paren) { |
2858 | if (n) { |
cf93c79d |
2859 | PL_regstartp[paren] = HOPc(PL_reginput, -1) - PL_bostr; |
2860 | PL_regendp[paren] = PL_reginput - PL_bostr; |
a0ed51b3 |
2861 | } |
2862 | else |
cf93c79d |
2863 | PL_regendp[paren] = -1; |
c277df42 |
2864 | } |
a0d0e21e |
2865 | if (regmatch(next)) |
4633a7c4 |
2866 | sayYES; |
c277df42 |
2867 | REGCP_UNWIND; |
bbce6d69 |
2868 | } |
c277df42 |
2869 | /* Couldn't or didn't -- move forward. */ |
a0ed51b3 |
2870 | PL_reginput = locinput; |
a0d0e21e |
2871 | if (regrepeat(scan, 1)) { |
2872 | ln++; |
a0ed51b3 |
2873 | locinput = PL_reginput; |
2874 | } |
2875 | else |
4633a7c4 |
2876 | sayNO; |
a0d0e21e |
2877 | } |
2878 | } |
2879 | else { |
c277df42 |
2880 | CHECKPOINT lastcp; |
a0d0e21e |
2881 | n = regrepeat(scan, n); |
a0ed51b3 |
2882 | locinput = PL_reginput; |
22c35a8c |
2883 | if (ln < n && PL_regkind[(U8)OP(next)] == EOL && |
3280af22 |
2884 | (!PL_multiline || OP(next) == SEOL)) |
a0d0e21e |
2885 | ln = n; /* why back off? */ |
c277df42 |
2886 | REGCP_SET; |
2887 | if (paren) { |
2888 | while (n >= ln) { |
2889 | /* If it could work, try it. */ |
2890 | if (c1 == -1000 || |
3280af22 |
2891 | UCHARAT(PL_reginput) == c1 || |
2892 | UCHARAT(PL_reginput) == c2) |
c277df42 |
2893 | { |
2894 | if (paren && n) { |
2895 | if (n) { |
cf93c79d |
2896 | PL_regstartp[paren] = HOPc(PL_reginput, -1) - PL_bostr; |
2897 | PL_regendp[paren] = PL_reginput - PL_bostr; |
a0ed51b3 |
2898 | } |
2899 | else |
cf93c79d |
2900 | PL_regendp[paren] = -1; |
c277df42 |
2901 | } |
2902 | if (regmatch(next)) |
2903 | sayYES; |
2904 | REGCP_UNWIND; |
2905 | } |
2906 | /* Couldn't or didn't -- back up. */ |
2907 | n--; |
dfe13c55 |
2908 | PL_reginput = locinput = HOPc(locinput, -1); |
c277df42 |
2909 | } |
a0ed51b3 |
2910 | } |
2911 | else { |
c277df42 |
2912 | while (n >= ln) { |
2913 | /* If it could work, try it. */ |
2914 | if (c1 == -1000 || |
3280af22 |
2915 | UCHARAT(PL_reginput) == c1 || |
2916 | UCHARAT(PL_reginput) == c2) |
c277df42 |
2917 | { |
2918 | if (regmatch(next)) |
2919 | sayYES; |
2920 | REGCP_UNWIND; |
2921 | } |
2922 | /* Couldn't or didn't -- back up. */ |
2923 | n--; |
dfe13c55 |
2924 | PL_reginput = locinput = HOPc(locinput, -1); |
bbce6d69 |
2925 | } |
a0d0e21e |
2926 | } |
2927 | } |
4633a7c4 |
2928 | sayNO; |
c277df42 |
2929 | break; |
a0d0e21e |
2930 | case END: |
0f5d15d6 |
2931 | if (PL_reg_call_cc) { |
2932 | re_cc_state *cur_call_cc = PL_reg_call_cc; |
2933 | CURCUR *cctmp = PL_regcc; |
2934 | regexp *re = PL_reg_re; |
2935 | CHECKPOINT cp, lastcp; |
2936 | |
2937 | cp = regcppush(0); /* Save *all* the positions. */ |
2938 | REGCP_SET; |
2939 | regcp_set_to(PL_reg_call_cc->ss); /* Restore parens of |
2940 | the caller. */ |
2941 | PL_reginput = locinput; /* Make position available to |
2942 | the callcc. */ |
2943 | cache_re(PL_reg_call_cc->re); |
2944 | PL_regcc = PL_reg_call_cc->cc; |
2945 | PL_reg_call_cc = PL_reg_call_cc->prev; |
2946 | if (regmatch(cur_call_cc->node)) { |
2947 | PL_reg_call_cc = cur_call_cc; |
2948 | regcpblow(cp); |
2949 | sayYES; |
2950 | } |
2951 | REGCP_UNWIND; |
2952 | regcppop(); |
2953 | PL_reg_call_cc = cur_call_cc; |
2954 | PL_regcc = cctmp; |
2955 | PL_reg_re = re; |
2956 | cache_re(re); |
2957 | |
2958 | DEBUG_r( |
2959 | PerlIO_printf(Perl_debug_log, |
2960 | "%*s continuation failed...\n", |
2961 | REPORT_CODE_OFF+PL_regindent*2, "") |
2962 | ); |
7821416a |
2963 | sayNO_SILENT; |
0f5d15d6 |
2964 | } |
7821416a |
2965 | if (locinput < PL_regtill) { |
2966 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
2967 | "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n", |
2968 | PL_colors[4], |
2969 | (long)(locinput - PL_reg_starttry), |
2970 | (long)(PL_regtill - PL_reg_starttry), |
2971 | PL_colors[5])); |
2972 | sayNO_FINAL; /* Cannot match: too short. */ |
2973 | } |
2974 | PL_reginput = locinput; /* put where regtry can find it */ |
2975 | sayYES_FINAL; /* Success! */ |
7e5428c5 |
2976 | case SUCCEED: |
3280af22 |
2977 | PL_reginput = locinput; /* put where regtry can find it */ |
7821416a |
2978 | sayYES_LOUD; /* Success! */ |
c277df42 |
2979 | case SUSPEND: |
2980 | n = 1; |
9fe1d20c |
2981 | PL_reginput = locinput; |
c277df42 |
2982 | goto do_ifmatch; |
a0d0e21e |
2983 | case UNLESSM: |
c277df42 |
2984 | n = 0; |
a0ed51b3 |
2985 | if (scan->flags) { |
0fe9bf95 |
2986 | if (UTF) { /* XXXX This is absolutely |
2987 | broken, we read before |
2988 | start of string. */ |
2989 | s = HOPMAYBEc(locinput, -scan->flags); |
2990 | if (!s) |
2991 | goto say_yes; |
2992 | PL_reginput = s; |
2993 | } |
2994 | else { |
2995 | if (locinput < PL_bostr + scan->flags) |
2996 | goto say_yes; |
2997 | PL_reginput = locinput - scan->flags; |
2998 | goto do_ifmatch; |
2999 | } |
a0ed51b3 |
3000 | } |
3001 | else |
3002 | PL_reginput = locinput; |
c277df42 |
3003 | goto do_ifmatch; |
3004 | case IFMATCH: |
3005 | n = 1; |
a0ed51b3 |
3006 | if (scan->flags) { |
0fe9bf95 |
3007 | if (UTF) { /* XXXX This is absolutely |
3008 | broken, we read before |
3009 | start of string. */ |
3010 | s = HOPMAYBEc(locinput, -scan->flags); |
3011 | if (!s || s < PL_bostr) |
3012 | goto say_no; |
3013 | PL_reginput = s; |
3014 | } |
3015 | else { |
3016 | if (locinput < PL_bostr + scan->flags) |
3017 | goto say_no; |
3018 | PL_reginput = locinput - scan->flags; |
3019 | goto do_ifmatch; |
3020 | } |
a0ed51b3 |
3021 | } |
3022 | else |
3023 | PL_reginput = locinput; |
3024 | |
c277df42 |
3025 | do_ifmatch: |
c277df42 |
3026 | inner = NEXTOPER(NEXTOPER(scan)); |
3027 | if (regmatch(inner) != n) { |
3028 | say_no: |
3029 | if (logical) { |
3030 | logical = 0; |
3031 | sw = 0; |
3032 | goto do_longjump; |
a0ed51b3 |
3033 | } |
3034 | else |
c277df42 |
3035 | sayNO; |
3036 | } |
3037 | say_yes: |
3038 | if (logical) { |
3039 | logical = 0; |
3040 | sw = 1; |
3041 | } |
fe44a5e8 |
3042 | if (OP(scan) == SUSPEND) { |
3280af22 |
3043 | locinput = PL_reginput; |
565764a8 |
3044 | nextchr = UCHARAT(locinput); |
fe44a5e8 |
3045 | } |
c277df42 |
3046 | /* FALL THROUGH. */ |
3047 | case LONGJMP: |
3048 | do_longjump: |
3049 | next = scan + ARG(scan); |
3050 | if (next == scan) |
3051 | next = NULL; |
a0d0e21e |
3052 | break; |
3053 | default: |
bf49b057 |
3054 | PerlIO_printf(Perl_error_log, "%lx %d\n", |
c277df42 |
3055 | (unsigned long)scan, OP(scan)); |
cea2e8a9 |
3056 | Perl_croak(aTHX_ "regexp memory corruption"); |
a687059c |
3057 | } |
a0d0e21e |
3058 | scan = next; |
3059 | } |
a687059c |
3060 | |
a0d0e21e |
3061 | /* |
3062 | * We get here only if there's trouble -- normally "case END" is |
3063 | * the terminating point. |
3064 | */ |
cea2e8a9 |
3065 | Perl_croak(aTHX_ "corrupted regexp pointers"); |
a0d0e21e |
3066 | /*NOTREACHED*/ |
4633a7c4 |
3067 | sayNO; |
3068 | |
7821416a |
3069 | yes_loud: |
3070 | DEBUG_r( |
3071 | PerlIO_printf(Perl_debug_log, |
3072 | "%*s %scould match...%s\n", |
3073 | REPORT_CODE_OFF+PL_regindent*2, "", PL_colors[4],PL_colors[5]) |
3074 | ); |
3075 | goto yes; |
3076 | yes_final: |
3077 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n", |
3078 | PL_colors[4],PL_colors[5])); |
4633a7c4 |
3079 | yes: |
3080 | #ifdef DEBUGGING |
3280af22 |
3081 | PL_regindent--; |
4633a7c4 |
3082 | #endif |
3083 | return 1; |
3084 | |
3085 | no: |
7821416a |
3086 | DEBUG_r( |
3087 | PerlIO_printf(Perl_debug_log, |
3088 | "%*s %sfailed...%s\n", |
3089 | REPORT_CODE_OFF+PL_regindent*2, "",PL_colors[4],PL_colors[5]) |
3090 | ); |
3091 | goto do_no; |
3092 | no_final: |
3093 | do_no: |
4633a7c4 |
3094 | #ifdef DEBUGGING |
3280af22 |
3095 | PL_regindent--; |
4633a7c4 |
3096 | #endif |
a0d0e21e |
3097 | return 0; |
a687059c |
3098 | } |
3099 | |
3100 | /* |
3101 | - regrepeat - repeatedly match something simple, report how many |
3102 | */ |
3103 | /* |
3104 | * [This routine now assumes that it will only match on things of length 1. |
3105 | * That was true before, but now we assume scan - reginput is the count, |
a0ed51b3 |
3106 | * rather than incrementing count on every character. [Er, except utf8.]] |
a687059c |
3107 | */ |
76e3520e |
3108 | STATIC I32 |
cea2e8a9 |
3109 | S_regrepeat(pTHX_ regnode *p, I32 max) |
a687059c |
3110 | { |
5c0ca799 |
3111 | dTHR; |
a0d0e21e |
3112 | register char *scan; |
3113 | register char *opnd; |
3114 | register I32 c; |
3280af22 |
3115 | register char *loceol = PL_regeol; |
a0ed51b3 |
3116 | register I32 hardcount = 0; |
a0d0e21e |
3117 | |
3280af22 |
3118 | scan = PL_reginput; |
c277df42 |
3119 | if (max != REG_INFTY && max < loceol - scan) |
a0d0e21e |
3120 | loceol = scan + max; |
a0d0e21e |
3121 | switch (OP(p)) { |
22c35a8c |
3122 | case REG_ANY: |
a0d0e21e |
3123 | while (scan < loceol && *scan != '\n') |
3124 | scan++; |
3125 | break; |
3126 | case SANY: |
3127 | scan = loceol; |
3128 | break; |
a0ed51b3 |
3129 | case ANYUTF8: |
3130 | loceol = PL_regeol; |
3131 | while (scan < loceol && *scan != '\n') { |
3132 | scan += UTF8SKIP(scan); |
3133 | hardcount++; |
3134 | } |
3135 | break; |
3136 | case SANYUTF8: |
3137 | loceol = PL_regeol; |
3138 | while (scan < loceol) { |
3139 | scan += UTF8SKIP(scan); |
3140 | hardcount++; |
3141 | } |
3142 | break; |
bbce6d69 |
3143 | case EXACT: /* length of string is 1 */ |
cd439c50 |
3144 | c = (U8)*STRING(p); |
bbce6d69 |
3145 | while (scan < loceol && UCHARAT(scan) == c) |
3146 | scan++; |
3147 | break; |
3148 | case EXACTF: /* length of string is 1 */ |
cd439c50 |
3149 | c = (U8)*STRING(p); |
bbce6d69 |
3150 | while (scan < loceol && |
22c35a8c |
3151 | (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c])) |
bbce6d69 |
3152 | scan++; |
3153 | break; |
3154 | case EXACTFL: /* length of string is 1 */ |
3280af22 |
3155 | PL_reg_flags |= RF_tainted; |
cd439c50 |
3156 | c = (U8)*STRING(p); |
bbce6d69 |
3157 | while (scan < loceol && |
22c35a8c |
3158 | (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c])) |
a0d0e21e |
3159 | scan++; |
3160 | break; |
a0ed51b3 |
3161 | case ANYOFUTF8: |
3162 | loceol = PL_regeol; |
3163 | while (scan < loceol && REGINCLASSUTF8(p, (U8*)scan)) { |
3164 | scan += UTF8SKIP(scan); |
3165 | hardcount++; |
3166 | } |
3167 | break; |
a0d0e21e |
3168 | case ANYOF: |
cd439c50 |
3169 | opnd = MASK(p); |
ae5c130c |
3170 | while (scan < loceol && REGINCLASS(opnd, *scan)) |
a0d0e21e |
3171 | scan++; |
a0d0e21e |
3172 | break; |
3173 | case ALNUM: |
3174 | while (scan < loceol && isALNUM(*scan)) |
3175 | scan++; |
3176 | break; |
a0ed51b3 |
3177 | case ALNUMUTF8: |
3178 | loceol = PL_regeol; |
dfe13c55 |
3179 | while (scan < loceol && swash_fetch(PL_utf8_alnum, (U8*)scan)) { |
a0ed51b3 |
3180 | scan += UTF8SKIP(scan); |
3181 | hardcount++; |
3182 | } |
3183 | break; |
bbce6d69 |
3184 | case ALNUML: |
3280af22 |
3185 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
3186 | while (scan < loceol && isALNUM_LC(*scan)) |
3187 | scan++; |
3188 | break; |
a0ed51b3 |
3189 | case ALNUMLUTF8: |
3190 | PL_reg_flags |= RF_tainted; |
3191 | loceol = PL_regeol; |
dfe13c55 |
3192 | while (scan < loceol && isALNUM_LC_utf8((U8*)scan)) { |
a0ed51b3 |
3193 | scan += UTF8SKIP(scan); |
3194 | hardcount++; |
3195 | } |
3196 | break; |
3197 | break; |
a0d0e21e |
3198 | case NALNUM: |
3199 | while (scan < loceol && !isALNUM(*scan)) |
3200 | scan++; |
3201 | break; |
a0ed51b3 |
3202 | case NALNUMUTF8: |
3203 | loceol = PL_regeol; |
dfe13c55 |
3204 | while (scan < loceol && !swash_fetch(PL_utf8_alnum, (U8*)scan)) { |
a0ed51b3 |
3205 | scan += UTF8SKIP(scan); |
3206 | hardcount++; |
3207 | } |
3208 | break; |
bbce6d69 |
3209 | case NALNUML: |
3280af22 |
3210 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
3211 | while (scan < loceol && !isALNUM_LC(*scan)) |
3212 | scan++; |
3213 | break; |
a0ed51b3 |
3214 | case NALNUMLUTF8: |
3215 | PL_reg_flags |= RF_tainted; |
3216 | loceol = PL_regeol; |
dfe13c55 |
3217 | while (scan < loceol && !isALNUM_LC_utf8((U8*)scan)) { |
a0ed51b3 |
3218 | scan += UTF8SKIP(scan); |
3219 | hardcount++; |
3220 | } |
3221 | break; |
a0d0e21e |
3222 | case SPACE: |
3223 | while (scan < loceol && isSPACE(*scan)) |
3224 | scan++; |
3225 | break; |
a0ed51b3 |
3226 | case SPACEUTF8: |
3227 | loceol = PL_regeol; |
dfe13c55 |
3228 | while (scan < loceol && (*scan == ' ' || swash_fetch(PL_utf8_space,(U8*)scan))) { |
a0ed51b3 |
3229 | scan += UTF8SKIP(scan); |
3230 | hardcount++; |
3231 | } |
3232 | break; |
bbce6d69 |
3233 | case SPACEL: |
3280af22 |
3234 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
3235 | while (scan < loceol && isSPACE_LC(*scan)) |
3236 | scan++; |
3237 | break; |
a0ed51b3 |
3238 | case SPACELUTF8: |
3239 | PL_reg_flags |= RF_tainted; |
3240 | loceol = PL_regeol; |
dfe13c55 |
3241 | while (scan < loceol && (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
a0ed51b3 |
3242 | scan += UTF8SKIP(scan); |
3243 | hardcount++; |
3244 | } |
3245 | break; |
a0d0e21e |
3246 | case NSPACE: |
3247 | while (scan < loceol && !isSPACE(*scan)) |
3248 | scan++; |
3249 | break; |
a0ed51b3 |
3250 | case NSPACEUTF8: |
3251 | loceol = PL_regeol; |
dfe13c55 |
3252 | while (scan < loceol && !(*scan == ' ' || swash_fetch(PL_utf8_space,(U8*)scan))) { |
a0ed51b3 |
3253 | scan += UTF8SKIP(scan); |
3254 | hardcount++; |
3255 | } |
3256 | break; |
bbce6d69 |
3257 | case NSPACEL: |
3280af22 |
3258 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
3259 | while (scan < loceol && !isSPACE_LC(*scan)) |
3260 | scan++; |
3261 | break; |
a0ed51b3 |
3262 | case NSPACELUTF8: |
3263 | PL_reg_flags |= RF_tainted; |
3264 | loceol = PL_regeol; |
dfe13c55 |
3265 | while (scan < loceol && !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
a0ed51b3 |
3266 | scan += UTF8SKIP(scan); |
3267 | hardcount++; |
3268 | } |
3269 | break; |
a0d0e21e |
3270 | case DIGIT: |
3271 | while (scan < loceol && isDIGIT(*scan)) |
3272 | scan++; |
3273 | break; |
a0ed51b3 |
3274 | case DIGITUTF8: |
3275 | loceol = PL_regeol; |
dfe13c55 |
3276 | while (scan < loceol && swash_fetch(PL_utf8_digit,(U8*)scan)) { |
a0ed51b3 |
3277 | scan += UTF8SKIP(scan); |
3278 | hardcount++; |
3279 | } |
3280 | break; |
3281 | break; |
a0d0e21e |
3282 | case NDIGIT: |
3283 | while (scan < loceol && !isDIGIT(*scan)) |
3284 | scan++; |
3285 | break; |
a0ed51b3 |
3286 | case NDIGITUTF8: |
3287 | loceol = PL_regeol; |
dfe13c55 |
3288 | while (scan < loceol && !swash_fetch(PL_utf8_digit,(U8*)scan)) { |
a0ed51b3 |
3289 | scan += UTF8SKIP(scan); |
3290 | hardcount++; |
3291 | } |
3292 | break; |
a0d0e21e |
3293 | default: /* Called on something of 0 width. */ |
3294 | break; /* So match right here or not at all. */ |
3295 | } |
a687059c |
3296 | |
a0ed51b3 |
3297 | if (hardcount) |
3298 | c = hardcount; |
3299 | else |
3300 | c = scan - PL_reginput; |
3280af22 |
3301 | PL_reginput = scan; |
a687059c |
3302 | |
c277df42 |
3303 | DEBUG_r( |
3304 | { |
3305 | SV *prop = sv_newmortal(); |
3306 | |
3307 | regprop(prop, p); |
3308 | PerlIO_printf(Perl_debug_log, |
3309 | "%*s %s can match %ld times out of %ld...\n", |
3310 | REPORT_CODE_OFF+1, "", SvPVX(prop),c,max); |
3311 | }); |
3312 | |
a0d0e21e |
3313 | return(c); |
a687059c |
3314 | } |
3315 | |
3316 | /* |
c277df42 |
3317 | - regrepeat_hard - repeatedly match something, report total lenth and length |
3318 | * |
3319 | * The repeater is supposed to have constant length. |
3320 | */ |
3321 | |
76e3520e |
3322 | STATIC I32 |
cea2e8a9 |
3323 | S_regrepeat_hard(pTHX_ regnode *p, I32 max, I32 *lp) |
c277df42 |
3324 | { |
5c0ca799 |
3325 | dTHR; |
c277df42 |
3326 | register char *scan; |
3327 | register char *start; |
3280af22 |
3328 | register char *loceol = PL_regeol; |
a0ed51b3 |
3329 | I32 l = 0; |
708e3b05 |
3330 | I32 count = 0, res = 1; |
a0ed51b3 |
3331 | |
3332 | if (!max) |
3333 | return 0; |
c277df42 |
3334 | |
3280af22 |
3335 | start = PL_reginput; |
a0ed51b3 |
3336 | if (UTF) { |
708e3b05 |
3337 | while (PL_reginput < loceol && (scan = PL_reginput, res = regmatch(p))) { |
a0ed51b3 |
3338 | if (!count++) { |
3339 | l = 0; |
3340 | while (start < PL_reginput) { |
3341 | l++; |
3342 | start += UTF8SKIP(start); |
3343 | } |
3344 | *lp = l; |
3345 | if (l == 0) |
3346 | return max; |
3347 | } |
3348 | if (count == max) |
3349 | return count; |
3350 | } |
3351 | } |
3352 | else { |
708e3b05 |
3353 | while (PL_reginput < loceol && (scan = PL_reginput, res = regmatch(p))) { |
a0ed51b3 |
3354 | if (!count++) { |
3355 | *lp = l = PL_reginput - start; |
3356 | if (max != REG_INFTY && l*max < loceol - scan) |
3357 | loceol = scan + l*max; |
3358 | if (l == 0) |
3359 | return max; |
c277df42 |
3360 | } |
3361 | } |
3362 | } |
708e3b05 |
3363 | if (!res) |
3280af22 |
3364 | PL_reginput = scan; |
c277df42 |
3365 | |
a0ed51b3 |
3366 | return count; |
c277df42 |
3367 | } |
3368 | |
3369 | /* |
cb8d8820 |
3370 | - reginclass - determine if a character falls into a character class |
bbce6d69 |
3371 | */ |
3372 | |
76e3520e |
3373 | STATIC bool |
cea2e8a9 |
3374 | S_reginclass(pTHX_ register char *p, register I32 c) |
bbce6d69 |
3375 | { |
5c0ca799 |
3376 | dTHR; |
b8c5462f |
3377 | char flags = ANYOF_FLAGS(p); |
bbce6d69 |
3378 | bool match = FALSE; |
3379 | |
3380 | c &= 0xFF; |
b8c5462f |
3381 | if (ANYOF_BITMAP_TEST(p, c)) |
bbce6d69 |
3382 | match = TRUE; |
3383 | else if (flags & ANYOF_FOLD) { |
3384 | I32 cf; |
3385 | if (flags & ANYOF_LOCALE) { |
3280af22 |
3386 | PL_reg_flags |= RF_tainted; |
22c35a8c |
3387 | cf = PL_fold_locale[c]; |
bbce6d69 |
3388 | } |
3389 | else |
22c35a8c |
3390 | cf = PL_fold[c]; |
b8c5462f |
3391 | if (ANYOF_BITMAP_TEST(p, cf)) |
bbce6d69 |
3392 | match = TRUE; |
3393 | } |
3394 | |
b8c5462f |
3395 | if (!match && (flags & ANYOF_CLASS)) { |
3280af22 |
3396 | PL_reg_flags |= RF_tainted; |
b8c5462f |
3397 | if ( |
3398 | (ANYOF_CLASS_TEST(p, ANYOF_ALNUM) && isALNUM_LC(c)) || |
3399 | (ANYOF_CLASS_TEST(p, ANYOF_NALNUM) && !isALNUM_LC(c)) || |
3400 | (ANYOF_CLASS_TEST(p, ANYOF_SPACE) && isSPACE_LC(c)) || |
3401 | (ANYOF_CLASS_TEST(p, ANYOF_NSPACE) && !isSPACE_LC(c)) || |
3402 | (ANYOF_CLASS_TEST(p, ANYOF_DIGIT) && isDIGIT_LC(c)) || |
3403 | (ANYOF_CLASS_TEST(p, ANYOF_NDIGIT) && !isDIGIT_LC(c)) || |
3404 | (ANYOF_CLASS_TEST(p, ANYOF_ALNUMC) && isALNUMC_LC(c)) || |
3405 | (ANYOF_CLASS_TEST(p, ANYOF_NALNUMC) && !isALNUMC_LC(c)) || |
3406 | (ANYOF_CLASS_TEST(p, ANYOF_ALPHA) && isALPHA_LC(c)) || |
3407 | (ANYOF_CLASS_TEST(p, ANYOF_NALPHA) && !isALPHA_LC(c)) || |
3408 | (ANYOF_CLASS_TEST(p, ANYOF_ASCII) && isASCII(c)) || |
3409 | (ANYOF_CLASS_TEST(p, ANYOF_NASCII) && !isASCII(c)) || |
3410 | (ANYOF_CLASS_TEST(p, ANYOF_CNTRL) && isCNTRL_LC(c)) || |
3411 | (ANYOF_CLASS_TEST(p, ANYOF_NCNTRL) && !isCNTRL_LC(c)) || |
3412 | (ANYOF_CLASS_TEST(p, ANYOF_GRAPH) && isGRAPH_LC(c)) || |
3413 | (ANYOF_CLASS_TEST(p, ANYOF_NGRAPH) && !isGRAPH_LC(c)) || |
3414 | (ANYOF_CLASS_TEST(p, ANYOF_LOWER) && isLOWER_LC(c)) || |
3415 | (ANYOF_CLASS_TEST(p, ANYOF_NLOWER) && !isLOWER_LC(c)) || |
3416 | (ANYOF_CLASS_TEST(p, ANYOF_PRINT) && isPRINT_LC(c)) || |
3417 | (ANYOF_CLASS_TEST(p, ANYOF_NPRINT) && !isPRINT_LC(c)) || |
3418 | (ANYOF_CLASS_TEST(p, ANYOF_PUNCT) && isPUNCT_LC(c)) || |
3419 | (ANYOF_CLASS_TEST(p, ANYOF_NPUNCT) && !isPUNCT_LC(c)) || |
3420 | (ANYOF_CLASS_TEST(p, ANYOF_UPPER) && isUPPER_LC(c)) || |
3421 | (ANYOF_CLASS_TEST(p, ANYOF_NUPPER) && !isUPPER_LC(c)) || |
3422 | (ANYOF_CLASS_TEST(p, ANYOF_XDIGIT) && isXDIGIT(c)) || |
3423 | (ANYOF_CLASS_TEST(p, ANYOF_NXDIGIT) && !isXDIGIT(c)) |
3424 | ) /* How's that for a conditional? */ |
bbce6d69 |
3425 | { |
3426 | match = TRUE; |
3427 | } |
3428 | } |
3429 | |
ae5c130c |
3430 | return (flags & ANYOF_INVERT) ? !match : match; |
bbce6d69 |
3431 | } |
3432 | |
a0ed51b3 |
3433 | STATIC bool |
cea2e8a9 |
3434 | S_reginclassutf8(pTHX_ regnode *f, U8 *p) |
c485e607 |
3435 | { |
3436 | dTHR; |
a0ed51b3 |
3437 | char flags = ARG1(f); |
3438 | bool match = FALSE; |
3439 | SV *sv = (SV*)PL_regdata->data[ARG2(f)]; |
3440 | |
3441 | if (swash_fetch(sv, p)) |
3442 | match = TRUE; |
3443 | else if (flags & ANYOF_FOLD) { |
3444 | I32 cf; |
dfe13c55 |
3445 | U8 tmpbuf[10]; |
a0ed51b3 |
3446 | if (flags & ANYOF_LOCALE) { |
3447 | PL_reg_flags |= RF_tainted; |
3448 | uv_to_utf8(tmpbuf, toLOWER_LC_utf8(p)); |
3449 | } |
3450 | else |
3451 | uv_to_utf8(tmpbuf, toLOWER_utf8(p)); |
3452 | if (swash_fetch(sv, tmpbuf)) |
3453 | match = TRUE; |
3454 | } |
3455 | |
b8c5462f |
3456 | /* UTF8 combined with ANYOF_CLASS is ill-defined. */ |
a0ed51b3 |
3457 | |
3458 | return (flags & ANYOF_INVERT) ? !match : match; |
3459 | } |
161b471a |
3460 | |
dfe13c55 |
3461 | STATIC U8 * |
cea2e8a9 |
3462 | S_reghop(pTHX_ U8 *s, I32 off) |
c485e607 |
3463 | { |
3464 | dTHR; |
a0ed51b3 |
3465 | if (off >= 0) { |
3466 | while (off-- && s < (U8*)PL_regeol) |
3467 | s += UTF8SKIP(s); |
3468 | } |
3469 | else { |
3470 | while (off++) { |
3471 | if (s > (U8*)PL_bostr) { |
3472 | s--; |
3473 | if (*s & 0x80) { |
3474 | while (s > (U8*)PL_bostr && (*s & 0xc0) == 0x80) |
3475 | s--; |
3476 | } /* XXX could check well-formedness here */ |
3477 | } |
3478 | } |
3479 | } |
3480 | return s; |
3481 | } |
161b471a |
3482 | |
dfe13c55 |
3483 | STATIC U8 * |
cea2e8a9 |
3484 | S_reghopmaybe(pTHX_ U8* s, I32 off) |
a0ed51b3 |
3485 | { |
c485e607 |
3486 | dTHR; |
a0ed51b3 |
3487 | if (off >= 0) { |
3488 | while (off-- && s < (U8*)PL_regeol) |
3489 | s += UTF8SKIP(s); |
3490 | if (off >= 0) |
3491 | return 0; |
3492 | } |
3493 | else { |
3494 | while (off++) { |
3495 | if (s > (U8*)PL_bostr) { |
3496 | s--; |
3497 | if (*s & 0x80) { |
3498 | while (s > (U8*)PL_bostr && (*s & 0xc0) == 0x80) |
3499 | s--; |
3500 | } /* XXX could check well-formedness here */ |
3501 | } |
3502 | else |
3503 | break; |
3504 | } |
3505 | if (off <= 0) |
3506 | return 0; |
3507 | } |
3508 | return s; |
3509 | } |
51371543 |
3510 | |
3511 | #ifdef PERL_OBJECT |
3512 | #define NO_XSLOCKS |
3513 | #include "XSUB.h" |
3514 | #endif |
3515 | |
3516 | static void |
3517 | restore_pos(pTHXo_ void *arg) |
3518 | { |
3519 | dTHR; |
3520 | if (PL_reg_eval_set) { |
3521 | if (PL_reg_oldsaved) { |
3522 | PL_reg_re->subbeg = PL_reg_oldsaved; |
3523 | PL_reg_re->sublen = PL_reg_oldsavedlen; |
3524 | RX_MATCH_COPIED_on(PL_reg_re); |
3525 | } |
3526 | PL_reg_magic->mg_len = PL_reg_oldpos; |
3527 | PL_reg_eval_set = 0; |
3528 | PL_curpm = PL_reg_oldcurpm; |
3529 | } |
3530 | } |
3531 | |