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 */ |
28 | # ifndef DEBUGGING |
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 |
d06ea78c |
38 | /* *These* symbols are masked to allow static link. */ |
39 | # define Perl_pregexec my_pregexec |
56953603 |
40 | #endif |
41 | |
f0fcb552 |
42 | /*SUPPRESS 112*/ |
a687059c |
43 | /* |
e50aee73 |
44 | * pregcomp and pregexec -- regsub and regerror are not used in perl |
a687059c |
45 | * |
46 | * Copyright (c) 1986 by University of Toronto. |
47 | * Written by Henry Spencer. Not derived from licensed software. |
48 | * |
49 | * Permission is granted to anyone to use this software for any |
50 | * purpose on any computer system, and to redistribute it freely, |
51 | * subject to the following restrictions: |
52 | * |
53 | * 1. The author is not responsible for the consequences of use of |
54 | * this software, no matter how awful, even if they arise |
55 | * from defects in it. |
56 | * |
57 | * 2. The origin of this software must not be misrepresented, either |
58 | * by explicit claim or by omission. |
59 | * |
60 | * 3. Altered versions must be plainly marked as such, and must not |
61 | * be misrepresented as being the original software. |
62 | * |
63 | **** Alterations to Henry's code are... |
64 | **** |
a0ed51b3 |
65 | **** Copyright (c) 1991-1998, Larry Wall |
a687059c |
66 | **** |
9ef589d8 |
67 | **** You may distribute under the terms of either the GNU General Public |
68 | **** License or the Artistic License, as specified in the README file. |
a687059c |
69 | * |
70 | * Beware that some of this code is subtly aware of the way operator |
71 | * precedence is structured in regular expressions. Serious changes in |
72 | * regular-expression syntax might require a total rethink. |
73 | */ |
74 | #include "EXTERN.h" |
75 | #include "perl.h" |
0f5d15d6 |
76 | typedef MAGIC *my_magic; |
77 | |
a687059c |
78 | #include "regcomp.h" |
79 | |
c277df42 |
80 | #define RF_tainted 1 /* tainted information used? */ |
81 | #define RF_warned 2 /* warned about big count? */ |
ce862d02 |
82 | #define RF_evaled 4 /* Did an EVAL with setting? */ |
a0ed51b3 |
83 | #define RF_utf8 8 /* String contains multibyte chars? */ |
84 | |
85 | #define UTF (PL_reg_flags & RF_utf8) |
ce862d02 |
86 | |
87 | #define RS_init 1 /* eval environment created */ |
88 | #define RS_set 2 /* replsv value is set */ |
c277df42 |
89 | |
a687059c |
90 | #ifndef STATIC |
91 | #define STATIC static |
92 | #endif |
93 | |
76e3520e |
94 | #ifndef PERL_OBJECT |
a0d0e21e |
95 | typedef I32 CHECKPOINT; |
96 | |
c277df42 |
97 | /* |
98 | * Forwards. |
99 | */ |
100 | |
101 | static I32 regmatch _((regnode *prog)); |
102 | static I32 regrepeat _((regnode *p, I32 max)); |
103 | static I32 regrepeat_hard _((regnode *p, I32 max, I32 *lp)); |
104 | static I32 regtry _((regexp *prog, char *startpos)); |
ae5c130c |
105 | |
c277df42 |
106 | static bool reginclass _((char *p, I32 c)); |
a0ed51b3 |
107 | static bool reginclassutf8 _((regnode *f, U8* p)); |
55497cff |
108 | static CHECKPOINT regcppush _((I32 parenfloor)); |
109 | static char * regcppop _((void)); |
76e3520e |
110 | #endif |
a0ed51b3 |
111 | |
ae5c130c |
112 | #define REGINCLASS(p,c) (*(p) ? reginclass(p,c) : ANYOF_TEST(p,c)) |
a0ed51b3 |
113 | #define REGINCLASSUTF8(f,p) (ARG1(f) ? reginclassutf8(f,p) : swash_fetch((SV*)PL_regdata->data[ARG2(f)],p)) |
114 | |
115 | #define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv)) |
116 | #define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b) |
117 | |
dfe13c55 |
118 | #ifndef PERL_OBJECT |
119 | static U8 * reghop _((U8 *pos, I32 off)); |
120 | static U8 * reghopmaybe _((U8 *pos, I32 off)); |
121 | #endif |
122 | #define reghop_c(pos,off) ((char*)reghop((U8*)pos, off)) |
123 | #define reghopmaybe_c(pos,off) ((char*)reghopmaybe((U8*)pos, off)) |
124 | #define HOP(pos,off) (UTF ? reghop((U8*)pos, off) : (U8*)(pos + off)) |
125 | #define HOPMAYBE(pos,off) (UTF ? reghopmaybe((U8*)pos, off) : (U8*)(pos + off)) |
126 | #define HOPc(pos,off) ((char*)HOP(pos,off)) |
127 | #define HOPMAYBEc(pos,off) ((char*)HOPMAYBE(pos,off)) |
a0d0e21e |
128 | |
76e3520e |
129 | STATIC CHECKPOINT |
8ac85365 |
130 | regcppush(I32 parenfloor) |
a0d0e21e |
131 | { |
11343788 |
132 | dTHR; |
3280af22 |
133 | int retval = PL_savestack_ix; |
134 | int i = (PL_regsize - parenfloor) * 4; |
a0d0e21e |
135 | int p; |
136 | |
137 | SSCHECK(i + 5); |
3280af22 |
138 | for (p = PL_regsize; p > parenfloor; p--) { |
139 | SSPUSHPTR(PL_regendp[p]); |
140 | SSPUSHPTR(PL_regstartp[p]); |
141 | SSPUSHPTR(PL_reg_start_tmp[p]); |
a0d0e21e |
142 | SSPUSHINT(p); |
143 | } |
3280af22 |
144 | SSPUSHINT(PL_regsize); |
145 | SSPUSHINT(*PL_reglastparen); |
146 | SSPUSHPTR(PL_reginput); |
a0d0e21e |
147 | SSPUSHINT(i + 3); |
148 | SSPUSHINT(SAVEt_REGCONTEXT); |
149 | return retval; |
150 | } |
151 | |
c277df42 |
152 | /* These are needed since we do not localize EVAL nodes: */ |
c3464db5 |
153 | # define REGCP_SET DEBUG_r(PerlIO_printf(Perl_debug_log, \ |
154 | " Setting an EVAL scope, savestack=%i\n", \ |
3280af22 |
155 | PL_savestack_ix)); lastcp = PL_savestack_ix |
c3464db5 |
156 | |
3280af22 |
157 | # define REGCP_UNWIND DEBUG_r(lastcp != PL_savestack_ix ? \ |
c3464db5 |
158 | PerlIO_printf(Perl_debug_log, \ |
159 | " Clearing an EVAL scope, savestack=%i..%i\n", \ |
3280af22 |
160 | lastcp, PL_savestack_ix) : 0); regcpblow(lastcp) |
c277df42 |
161 | |
76e3520e |
162 | STATIC char * |
8ac85365 |
163 | regcppop(void) |
a0d0e21e |
164 | { |
11343788 |
165 | dTHR; |
a0d0e21e |
166 | I32 i = SSPOPINT; |
167 | U32 paren = 0; |
168 | char *input; |
169 | char *tmps; |
170 | assert(i == SAVEt_REGCONTEXT); |
171 | i = SSPOPINT; |
172 | input = (char *) SSPOPPTR; |
3280af22 |
173 | *PL_reglastparen = SSPOPINT; |
174 | PL_regsize = SSPOPINT; |
c277df42 |
175 | for (i -= 3; i > 0; i -= 4) { |
a0d0e21e |
176 | paren = (U32)SSPOPINT; |
3280af22 |
177 | PL_reg_start_tmp[paren] = (char *) SSPOPPTR; |
178 | PL_regstartp[paren] = (char *) SSPOPPTR; |
a0d0e21e |
179 | tmps = (char*)SSPOPPTR; |
3280af22 |
180 | if (paren <= *PL_reglastparen) |
181 | PL_regendp[paren] = tmps; |
c277df42 |
182 | DEBUG_r( |
c3464db5 |
183 | PerlIO_printf(Perl_debug_log, |
184 | " restoring \\%d to %d(%d)..%d%s\n", |
3280af22 |
185 | paren, PL_regstartp[paren] - PL_regbol, |
186 | PL_reg_start_tmp[paren] - PL_regbol, |
187 | PL_regendp[paren] - PL_regbol, |
188 | (paren > *PL_reglastparen ? "(no)" : "")); |
c277df42 |
189 | ); |
a0d0e21e |
190 | } |
c277df42 |
191 | DEBUG_r( |
3280af22 |
192 | if (*PL_reglastparen + 1 <= PL_regnpar) { |
c3464db5 |
193 | PerlIO_printf(Perl_debug_log, |
194 | " restoring \\%d..\\%d to undef\n", |
3280af22 |
195 | *PL_reglastparen + 1, PL_regnpar); |
c277df42 |
196 | } |
197 | ); |
3280af22 |
198 | for (paren = *PL_reglastparen + 1; paren <= PL_regnpar; paren++) { |
199 | if (paren > PL_regsize) |
200 | PL_regstartp[paren] = Nullch; |
201 | PL_regendp[paren] = Nullch; |
a0d0e21e |
202 | } |
203 | return input; |
204 | } |
205 | |
0f5d15d6 |
206 | STATIC char * |
207 | regcp_set_to(I32 ss) |
208 | { |
209 | I32 tmp = PL_savestack_ix; |
210 | |
211 | PL_savestack_ix = ss; |
212 | regcppop(); |
213 | PL_savestack_ix = tmp; |
214 | } |
215 | |
216 | typedef struct re_cc_state |
217 | { |
218 | I32 ss; |
219 | regnode *node; |
220 | struct re_cc_state *prev; |
221 | CURCUR *cc; |
222 | regexp *re; |
223 | } re_cc_state; |
224 | |
c277df42 |
225 | #define regcpblow(cp) LEAVE_SCOPE(cp) |
a0d0e21e |
226 | |
a687059c |
227 | /* |
e50aee73 |
228 | * pregexec and friends |
a687059c |
229 | */ |
230 | |
231 | /* |
c277df42 |
232 | - pregexec - match a regexp against a string |
a687059c |
233 | */ |
c277df42 |
234 | I32 |
c3464db5 |
235 | pregexec(register regexp *prog, char *stringarg, register char *strend, |
236 | char *strbeg, I32 minend, SV *screamer, U32 nosave) |
c277df42 |
237 | /* strend: pointer to null at end of string */ |
238 | /* strbeg: real beginning of string */ |
239 | /* minend: end of match must be >=minend after stringarg. */ |
240 | /* nosave: For optimizations. */ |
241 | { |
242 | return |
243 | regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL, |
244 | nosave ? 0 : REXEC_COPY_STR); |
245 | } |
0f5d15d6 |
246 | |
247 | STATIC void |
248 | cache_re(regexp *prog) |
249 | { |
250 | PL_regprecomp = prog->precomp; /* Needed for FAIL. */ |
251 | #ifdef DEBUGGING |
252 | PL_regprogram = prog->program; |
253 | #endif |
254 | PL_regnpar = prog->nparens; |
255 | PL_regdata = prog->data; |
256 | PL_reg_re = prog; |
257 | } |
c277df42 |
258 | |
a687059c |
259 | /* |
c277df42 |
260 | - regexec_flags - match a regexp against a string |
a687059c |
261 | */ |
79072805 |
262 | I32 |
c3464db5 |
263 | regexec_flags(register regexp *prog, char *stringarg, register char *strend, |
264 | char *strbeg, I32 minend, SV *screamer, void *data, U32 flags) |
c277df42 |
265 | /* strend: pointer to null at end of string */ |
266 | /* strbeg: real beginning of string */ |
267 | /* minend: end of match must be >=minend after stringarg. */ |
268 | /* data: May be used for some additional optimizations. */ |
269 | /* nosave: For optimizations. */ |
a687059c |
270 | { |
5c0ca799 |
271 | dTHR; |
a0d0e21e |
272 | register char *s; |
c277df42 |
273 | register regnode *c; |
a0d0e21e |
274 | register char *startpos = stringarg; |
275 | register I32 tmp; |
c277df42 |
276 | I32 minlen; /* must match at least this many chars */ |
a0d0e21e |
277 | I32 dontbother = 0; /* how many characters not to try at end */ |
278 | CURCUR cc; |
c277df42 |
279 | I32 start_shift = 0; /* Offset of the start to find |
a0ed51b3 |
280 | constant substr. */ /* CC */ |
281 | I32 end_shift = 0; /* Same for the end. */ /* CC */ |
c277df42 |
282 | I32 scream_pos = -1; /* Internal iterator of scream. */ |
283 | char *scream_olds; |
3280af22 |
284 | SV* oreplsv = GvSV(PL_replgv); |
a687059c |
285 | |
a0d0e21e |
286 | cc.cur = 0; |
4633a7c4 |
287 | cc.oldcc = 0; |
3280af22 |
288 | PL_regcc = &cc; |
a0d0e21e |
289 | |
0f5d15d6 |
290 | cache_re(prog); |
a0d0e21e |
291 | #ifdef DEBUGGING |
3280af22 |
292 | PL_regnarrate = PL_debug & 512; |
a0d0e21e |
293 | #endif |
294 | |
295 | /* Be paranoid... */ |
296 | if (prog == NULL || startpos == NULL) { |
297 | croak("NULL regexp parameter"); |
298 | return 0; |
299 | } |
300 | |
c277df42 |
301 | minlen = prog->minlen; |
302 | if (strend - startpos < minlen) goto phooey; |
303 | |
a0d0e21e |
304 | if (startpos == strbeg) /* is ^ valid at stringarg? */ |
3280af22 |
305 | PL_regprev = '\n'; |
a0d0e21e |
306 | else { |
a0ed51b3 |
307 | PL_regprev = (U32)stringarg[-1]; |
3280af22 |
308 | if (!PL_multiline && PL_regprev == '\n') |
309 | PL_regprev = '\0'; /* force ^ to NOT match */ |
a0d0e21e |
310 | } |
bbce6d69 |
311 | |
a0d0e21e |
312 | /* Check validity of program. */ |
313 | if (UCHARAT(prog->program) != MAGIC) { |
314 | FAIL("corrupted regexp program"); |
315 | } |
316 | |
3280af22 |
317 | PL_reg_flags = 0; |
318 | PL_reg_eval_set = 0; |
a0d0e21e |
319 | |
a0ed51b3 |
320 | if (prog->reganch & ROPT_UTF8) |
321 | PL_reg_flags |= RF_utf8; |
322 | |
323 | /* Mark beginning of line for ^ and lookbehind. */ |
324 | PL_regbol = startpos; |
325 | PL_bostr = strbeg; |
326 | |
327 | /* Mark end of line for $ (and such) */ |
328 | PL_regeol = strend; |
329 | |
330 | /* see how far we have to get to not match where we matched before */ |
331 | PL_regtill = startpos+minend; |
332 | |
0f5d15d6 |
333 | /* We start without call_cc context. */ |
334 | PL_reg_call_cc = 0; |
335 | |
a0d0e21e |
336 | /* If there is a "must appear" string, look for it. */ |
337 | s = startpos; |
c277df42 |
338 | if (!(flags & REXEC_CHECKED) |
339 | && prog->check_substr != Nullsv && |
774d564b |
340 | !(prog->reganch & ROPT_ANCH_GPOS) && |
c277df42 |
341 | (!(prog->reganch & (ROPT_ANCH_BOL | ROPT_ANCH_MBOL)) |
3280af22 |
342 | || (PL_multiline && prog->check_substr == prog->anchored_substr)) ) |
a0d0e21e |
343 | { |
a0ed51b3 |
344 | char *t; |
345 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
c277df42 |
346 | /* Should be nonnegative! */ |
a0ed51b3 |
347 | end_shift = minlen - start_shift - CHR_SVLEN(prog->check_substr); |
c277df42 |
348 | if (screamer) { |
3280af22 |
349 | if (PL_screamfirst[BmRARE(prog->check_substr)] >= 0) |
c277df42 |
350 | s = screaminstr(screamer, prog->check_substr, |
351 | start_shift + (stringarg - strbeg), |
352 | end_shift, &scream_pos, 0); |
a0d0e21e |
353 | else |
354 | s = Nullch; |
c277df42 |
355 | scream_olds = s; |
0a12ae7d |
356 | } |
a0d0e21e |
357 | else |
c277df42 |
358 | s = fbm_instr((unsigned char*)s + start_shift, |
359 | (unsigned char*)strend - end_shift, |
411d5715 |
360 | prog->check_substr, 0); |
a0d0e21e |
361 | if (!s) { |
c277df42 |
362 | ++BmUSEFUL(prog->check_substr); /* hooray */ |
a0d0e21e |
363 | goto phooey; /* not present */ |
a0ed51b3 |
364 | } |
365 | else if (s - stringarg > prog->check_offset_max && |
366 | (UTF |
dfe13c55 |
367 | ? ((t = reghopmaybe_c(s, -(prog->check_offset_max))) && t >= stringarg) |
a0ed51b3 |
368 | : (t = s - prog->check_offset_max) != 0 |
369 | ) |
370 | ) |
371 | { |
c277df42 |
372 | ++BmUSEFUL(prog->check_substr); /* hooray/2 */ |
a0ed51b3 |
373 | s = t; |
374 | } |
375 | else if (!(prog->reganch & ROPT_NAUGHTY) |
c277df42 |
376 | && --BmUSEFUL(prog->check_substr) < 0 |
377 | && prog->check_substr == prog->float_substr) { /* boo */ |
378 | SvREFCNT_dec(prog->check_substr); |
379 | prog->check_substr = Nullsv; /* disable */ |
380 | prog->float_substr = Nullsv; /* clear */ |
a0d0e21e |
381 | s = startpos; |
a0ed51b3 |
382 | } |
383 | else |
384 | s = startpos; |
a0d0e21e |
385 | } |
a687059c |
386 | |
c277df42 |
387 | DEBUG_r( |
388 | PerlIO_printf(Perl_debug_log, |
8d300b32 |
389 | "%sMatching%s `%s%.60s%s%s' against `%s%.*s%s%s'\n", |
390 | PL_colors[4],PL_colors[5],PL_colors[0], |
391 | prog->precomp, |
392 | PL_colors[1], |
c277df42 |
393 | (strlen(prog->precomp) > 60 ? "..." : ""), |
8d300b32 |
394 | PL_colors[0], |
c277df42 |
395 | (strend - startpos > 60 ? 60 : strend - startpos), |
8d300b32 |
396 | startpos, PL_colors[1], |
c277df42 |
397 | (strend - startpos > 60 ? "..." : "")) |
398 | ); |
399 | |
a0d0e21e |
400 | /* Simplest case: anchored match need be tried only once. */ |
774d564b |
401 | /* [unless only anchor is BOL and multiline is set] */ |
a0d0e21e |
402 | if (prog->reganch & ROPT_ANCH) { |
403 | if (regtry(prog, startpos)) |
404 | goto got_it; |
774d564b |
405 | else if (!(prog->reganch & ROPT_ANCH_GPOS) && |
3280af22 |
406 | (PL_multiline || (prog->reganch & ROPT_IMPLICIT) |
c277df42 |
407 | || (prog->reganch & ROPT_ANCH_MBOL))) |
774d564b |
408 | { |
a0d0e21e |
409 | if (minlen) |
410 | dontbother = minlen - 1; |
dfe13c55 |
411 | strend = HOPc(strend, -dontbother); |
a0d0e21e |
412 | /* for multiline we only have to try after newlines */ |
413 | if (s > startpos) |
414 | s--; |
415 | while (s < strend) { |
a0ed51b3 |
416 | if (*s++ == '\n') { /* don't need utf8skip here */ |
a0d0e21e |
417 | if (s < strend && regtry(prog, s)) |
418 | goto got_it; |
419 | } |
35c8bce7 |
420 | } |
35c8bce7 |
421 | } |
a0d0e21e |
422 | goto phooey; |
423 | } |
35c8bce7 |
424 | |
a0d0e21e |
425 | /* Messy cases: unanchored match. */ |
c277df42 |
426 | if (prog->anchored_substr && prog->reganch & ROPT_SKIP) { |
427 | /* we have /x+whatever/ */ |
428 | /* it must be a one character string */ |
429 | char ch = SvPVX(prog->anchored_substr)[0]; |
a0ed51b3 |
430 | if (UTF) { |
431 | while (s < strend) { |
432 | if (*s == ch) { |
433 | if (regtry(prog, s)) goto got_it; |
434 | s += UTF8SKIP(s); |
435 | while (s < strend && *s == ch) |
436 | s += UTF8SKIP(s); |
437 | } |
438 | s += UTF8SKIP(s); |
439 | } |
440 | } |
441 | else { |
442 | while (s < strend) { |
443 | if (*s == ch) { |
444 | if (regtry(prog, s)) goto got_it; |
c277df42 |
445 | s++; |
a0ed51b3 |
446 | while (s < strend && *s == ch) |
447 | s++; |
448 | } |
449 | s++; |
a0d0e21e |
450 | } |
a687059c |
451 | } |
c277df42 |
452 | } |
453 | /*SUPPRESS 560*/ |
454 | else if (prog->anchored_substr != Nullsv |
455 | || (prog->float_substr != Nullsv |
456 | && prog->float_max_offset < strend - s)) { |
457 | SV *must = prog->anchored_substr |
458 | ? prog->anchored_substr : prog->float_substr; |
459 | I32 back_max = |
460 | prog->anchored_substr ? prog->anchored_offset : prog->float_max_offset; |
461 | I32 back_min = |
462 | prog->anchored_substr ? prog->anchored_offset : prog->float_min_offset; |
463 | I32 delta = back_max - back_min; |
dfe13c55 |
464 | char *last = HOPc(strend, 0-(CHR_SVLEN(must) + back_min)); /* Cannot start after this */ |
a0ed51b3 |
465 | char *last1; /* Last position checked before */ |
466 | |
467 | if (s > PL_bostr) |
dfe13c55 |
468 | last1 = HOPc(s, -1); |
a0ed51b3 |
469 | else |
470 | last1 = s - 1; /* bogus */ |
c277df42 |
471 | |
472 | /* XXXX check_substr already used to find `s', can optimize if |
473 | check_substr==must. */ |
474 | scream_pos = -1; |
475 | dontbother = end_shift; |
dfe13c55 |
476 | strend = HOPc(strend, -dontbother); |
c277df42 |
477 | while ( (s <= last) && |
478 | (screamer |
dfe13c55 |
479 | ? (s = screaminstr(screamer, must, HOPc(s, back_min) - strbeg, |
c277df42 |
480 | end_shift, &scream_pos, 0)) |
a0ed51b3 |
481 | : (s = fbm_instr((unsigned char*)HOP(s, back_min), |
411d5715 |
482 | (unsigned char*)strend, must, 0))) ) { |
dfe13c55 |
483 | if (HOPc(s, -back_max) > last1) { |
484 | last1 = HOPc(s, -back_min); |
485 | s = HOPc(s, -back_max); |
a0ed51b3 |
486 | } |
487 | else { |
dfe13c55 |
488 | char *t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1; |
c277df42 |
489 | |
dfe13c55 |
490 | last1 = HOPc(s, -back_min); |
c277df42 |
491 | s = t; |
a0d0e21e |
492 | } |
a0ed51b3 |
493 | if (UTF) { |
494 | while (s <= last1) { |
495 | if (regtry(prog, s)) |
496 | goto got_it; |
497 | s += UTF8SKIP(s); |
498 | } |
499 | } |
500 | else { |
501 | while (s <= last1) { |
502 | if (regtry(prog, s)) |
503 | goto got_it; |
504 | s++; |
505 | } |
a0d0e21e |
506 | } |
507 | } |
508 | goto phooey; |
a0ed51b3 |
509 | } |
510 | else if (c = prog->regstclass) { |
a0d0e21e |
511 | I32 doevery = (prog->reganch & ROPT_SKIP) == 0; |
a0ed51b3 |
512 | char *cc; |
a687059c |
513 | |
a0d0e21e |
514 | if (minlen) |
515 | dontbother = minlen - 1; |
dfe13c55 |
516 | strend = HOPc(strend, -dontbother); /* don't bother with what can't match */ |
a0d0e21e |
517 | tmp = 1; |
518 | /* We know what class it must start with. */ |
519 | switch (OP(c)) { |
a0ed51b3 |
520 | case ANYOFUTF8: |
521 | cc = (char *) OPERAND(c); |
522 | while (s < strend) { |
523 | if (REGINCLASSUTF8(c, (U8*)s)) { |
524 | if (tmp && regtry(prog, s)) |
525 | goto got_it; |
526 | else |
527 | tmp = doevery; |
528 | } |
529 | else |
530 | tmp = 1; |
531 | s += UTF8SKIP(s); |
532 | } |
533 | break; |
a0d0e21e |
534 | case ANYOF: |
a0ed51b3 |
535 | cc = (char *) OPERAND(c); |
a0d0e21e |
536 | while (s < strend) { |
a0ed51b3 |
537 | if (REGINCLASS(cc, *s)) { |
a0d0e21e |
538 | if (tmp && regtry(prog, s)) |
539 | goto got_it; |
540 | else |
541 | tmp = doevery; |
a687059c |
542 | } |
a0d0e21e |
543 | else |
544 | tmp = 1; |
545 | s++; |
546 | } |
547 | break; |
bbce6d69 |
548 | case BOUNDL: |
3280af22 |
549 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
550 | /* FALL THROUGH */ |
a0d0e21e |
551 | case BOUND: |
a0ed51b3 |
552 | if (minlen) { |
553 | dontbother++; |
554 | strend -= 1; |
555 | } |
3280af22 |
556 | tmp = (s != startpos) ? UCHARAT(s - 1) : PL_regprev; |
95bac841 |
557 | tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0); |
a0d0e21e |
558 | while (s < strend) { |
95bac841 |
559 | if (tmp == !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) { |
a0d0e21e |
560 | tmp = !tmp; |
561 | if (regtry(prog, s)) |
562 | goto got_it; |
a687059c |
563 | } |
a0d0e21e |
564 | s++; |
565 | } |
566 | if ((minlen || tmp) && regtry(prog,s)) |
567 | goto got_it; |
568 | break; |
a0ed51b3 |
569 | case BOUNDLUTF8: |
570 | PL_reg_flags |= RF_tainted; |
571 | /* FALL THROUGH */ |
572 | case BOUNDUTF8: |
573 | if (minlen) { |
574 | dontbother++; |
dfe13c55 |
575 | strend = reghop_c(strend, -1); |
a0ed51b3 |
576 | } |
dfe13c55 |
577 | tmp = (I32)(s != startpos) ? utf8_to_uv(reghop((U8*)s, -1), 0) : PL_regprev; |
a0ed51b3 |
578 | tmp = ((OP(c) == BOUND ? isALNUM_uni(tmp) : isALNUM_LC_uni(tmp)) != 0); |
579 | while (s < strend) { |
dfe13c55 |
580 | if (tmp == !(OP(c) == BOUND ? |
581 | swash_fetch(PL_utf8_alnum, (U8*)s) : |
582 | isALNUM_LC_utf8((U8*)s))) |
583 | { |
a0ed51b3 |
584 | tmp = !tmp; |
585 | if (regtry(prog, s)) |
586 | goto got_it; |
587 | } |
588 | s += UTF8SKIP(s); |
589 | } |
590 | if ((minlen || tmp) && regtry(prog,s)) |
591 | goto got_it; |
592 | break; |
bbce6d69 |
593 | case NBOUNDL: |
3280af22 |
594 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
595 | /* FALL THROUGH */ |
a0d0e21e |
596 | case NBOUND: |
a0ed51b3 |
597 | if (minlen) { |
598 | dontbother++; |
599 | strend -= 1; |
600 | } |
3280af22 |
601 | tmp = (s != startpos) ? UCHARAT(s - 1) : PL_regprev; |
95bac841 |
602 | tmp = ((OP(c) == NBOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0); |
a0d0e21e |
603 | while (s < strend) { |
95bac841 |
604 | if (tmp == !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s))) |
a0d0e21e |
605 | tmp = !tmp; |
606 | else if (regtry(prog, s)) |
607 | goto got_it; |
608 | s++; |
609 | } |
610 | if ((minlen || !tmp) && regtry(prog,s)) |
611 | goto got_it; |
612 | break; |
a0ed51b3 |
613 | case NBOUNDLUTF8: |
614 | PL_reg_flags |= RF_tainted; |
615 | /* FALL THROUGH */ |
616 | case NBOUNDUTF8: |
617 | if (minlen) { |
618 | dontbother++; |
dfe13c55 |
619 | strend = reghop_c(strend, -1); |
a0ed51b3 |
620 | } |
dfe13c55 |
621 | tmp = (I32)(s != startpos) ? utf8_to_uv(reghop((U8*)s, -1), 0) : PL_regprev; |
a0ed51b3 |
622 | tmp = ((OP(c) == NBOUND ? isALNUM_uni(tmp) : isALNUM_LC_uni(tmp)) != 0); |
623 | while (s < strend) { |
dfe13c55 |
624 | if (tmp == !(OP(c) == NBOUND ? |
625 | swash_fetch(PL_utf8_alnum, (U8*)s) : |
626 | isALNUM_LC_utf8((U8*)s))) |
a0ed51b3 |
627 | tmp = !tmp; |
628 | else if (regtry(prog, s)) |
629 | goto got_it; |
630 | s += UTF8SKIP(s); |
631 | } |
632 | if ((minlen || !tmp) && regtry(prog,s)) |
633 | goto got_it; |
634 | break; |
a0d0e21e |
635 | case ALNUM: |
636 | while (s < strend) { |
bbce6d69 |
637 | if (isALNUM(*s)) { |
638 | if (tmp && regtry(prog, s)) |
639 | goto got_it; |
640 | else |
641 | tmp = doevery; |
642 | } |
643 | else |
644 | tmp = 1; |
645 | s++; |
646 | } |
647 | break; |
a0ed51b3 |
648 | case ALNUMUTF8: |
649 | while (s < strend) { |
dfe13c55 |
650 | if (swash_fetch(PL_utf8_alnum, (U8*)s)) { |
a0ed51b3 |
651 | if (tmp && regtry(prog, s)) |
652 | goto got_it; |
653 | else |
654 | tmp = doevery; |
655 | } |
656 | else |
657 | tmp = 1; |
658 | s += UTF8SKIP(s); |
659 | } |
660 | break; |
bbce6d69 |
661 | case ALNUML: |
3280af22 |
662 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
663 | while (s < strend) { |
664 | if (isALNUM_LC(*s)) { |
a0d0e21e |
665 | if (tmp && regtry(prog, s)) |
666 | goto got_it; |
a687059c |
667 | else |
a0d0e21e |
668 | tmp = doevery; |
669 | } |
670 | else |
671 | tmp = 1; |
672 | s++; |
673 | } |
674 | break; |
a0ed51b3 |
675 | case ALNUMLUTF8: |
676 | PL_reg_flags |= RF_tainted; |
677 | while (s < strend) { |
dfe13c55 |
678 | if (isALNUM_LC_utf8((U8*)s)) { |
a0ed51b3 |
679 | if (tmp && regtry(prog, s)) |
680 | goto got_it; |
681 | else |
682 | tmp = doevery; |
683 | } |
684 | else |
685 | tmp = 1; |
686 | s += UTF8SKIP(s); |
687 | } |
688 | break; |
a0d0e21e |
689 | case NALNUM: |
690 | while (s < strend) { |
bbce6d69 |
691 | if (!isALNUM(*s)) { |
692 | if (tmp && regtry(prog, s)) |
693 | goto got_it; |
694 | else |
695 | tmp = doevery; |
696 | } |
697 | else |
698 | tmp = 1; |
699 | s++; |
700 | } |
701 | break; |
a0ed51b3 |
702 | case NALNUMUTF8: |
703 | while (s < strend) { |
dfe13c55 |
704 | if (!swash_fetch(PL_utf8_alnum, (U8*)s)) { |
a0ed51b3 |
705 | if (tmp && regtry(prog, s)) |
706 | goto got_it; |
707 | else |
708 | tmp = doevery; |
709 | } |
710 | else |
711 | tmp = 1; |
712 | s += UTF8SKIP(s); |
713 | } |
714 | break; |
bbce6d69 |
715 | case NALNUML: |
3280af22 |
716 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
717 | while (s < strend) { |
718 | if (!isALNUM_LC(*s)) { |
a0d0e21e |
719 | if (tmp && regtry(prog, s)) |
720 | goto got_it; |
a687059c |
721 | else |
a0d0e21e |
722 | tmp = doevery; |
a687059c |
723 | } |
a0d0e21e |
724 | else |
725 | tmp = 1; |
726 | s++; |
727 | } |
728 | break; |
a0ed51b3 |
729 | case NALNUMLUTF8: |
730 | PL_reg_flags |= RF_tainted; |
731 | while (s < strend) { |
dfe13c55 |
732 | if (!isALNUM_LC_utf8((U8*)s)) { |
a0ed51b3 |
733 | if (tmp && regtry(prog, s)) |
734 | goto got_it; |
735 | else |
736 | tmp = doevery; |
737 | } |
738 | else |
739 | tmp = 1; |
740 | s += UTF8SKIP(s); |
741 | } |
742 | break; |
a0d0e21e |
743 | case SPACE: |
744 | while (s < strend) { |
745 | if (isSPACE(*s)) { |
746 | if (tmp && regtry(prog, s)) |
747 | goto got_it; |
748 | else |
749 | tmp = doevery; |
2304df62 |
750 | } |
a0d0e21e |
751 | else |
752 | tmp = 1; |
753 | s++; |
754 | } |
755 | break; |
a0ed51b3 |
756 | case SPACEUTF8: |
757 | while (s < strend) { |
dfe13c55 |
758 | if (*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s)) { |
a0ed51b3 |
759 | if (tmp && regtry(prog, s)) |
760 | goto got_it; |
761 | else |
762 | tmp = doevery; |
763 | } |
764 | else |
765 | tmp = 1; |
766 | s += UTF8SKIP(s); |
767 | } |
768 | break; |
bbce6d69 |
769 | case SPACEL: |
3280af22 |
770 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
771 | while (s < strend) { |
772 | if (isSPACE_LC(*s)) { |
773 | if (tmp && regtry(prog, s)) |
774 | goto got_it; |
775 | else |
776 | tmp = doevery; |
777 | } |
778 | else |
779 | tmp = 1; |
780 | s++; |
781 | } |
782 | break; |
a0ed51b3 |
783 | case SPACELUTF8: |
784 | PL_reg_flags |= RF_tainted; |
785 | while (s < strend) { |
dfe13c55 |
786 | if (*s == ' ' || isSPACE_LC_utf8((U8*)s)) { |
a0ed51b3 |
787 | if (tmp && regtry(prog, s)) |
788 | goto got_it; |
789 | else |
790 | tmp = doevery; |
791 | } |
792 | else |
793 | tmp = 1; |
794 | s += UTF8SKIP(s); |
795 | } |
796 | break; |
a0d0e21e |
797 | case NSPACE: |
798 | while (s < strend) { |
799 | if (!isSPACE(*s)) { |
800 | if (tmp && regtry(prog, s)) |
801 | goto got_it; |
802 | else |
803 | tmp = doevery; |
a687059c |
804 | } |
a0d0e21e |
805 | else |
806 | tmp = 1; |
807 | s++; |
808 | } |
809 | break; |
a0ed51b3 |
810 | case NSPACEUTF8: |
811 | while (s < strend) { |
dfe13c55 |
812 | if (!(*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s))) { |
a0ed51b3 |
813 | if (tmp && regtry(prog, s)) |
814 | goto got_it; |
815 | else |
816 | tmp = doevery; |
817 | } |
818 | else |
819 | tmp = 1; |
820 | s += UTF8SKIP(s); |
821 | } |
822 | break; |
bbce6d69 |
823 | case NSPACEL: |
3280af22 |
824 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
825 | while (s < strend) { |
826 | if (!isSPACE_LC(*s)) { |
827 | if (tmp && regtry(prog, s)) |
828 | goto got_it; |
829 | else |
830 | tmp = doevery; |
831 | } |
832 | else |
833 | tmp = 1; |
834 | s++; |
835 | } |
836 | break; |
a0ed51b3 |
837 | case NSPACELUTF8: |
838 | PL_reg_flags |= RF_tainted; |
839 | while (s < strend) { |
dfe13c55 |
840 | if (!(*s == ' ' || isSPACE_LC_utf8((U8*)s))) { |
a0ed51b3 |
841 | if (tmp && regtry(prog, s)) |
842 | goto got_it; |
843 | else |
844 | tmp = doevery; |
845 | } |
846 | else |
847 | tmp = 1; |
848 | s += UTF8SKIP(s); |
849 | } |
850 | break; |
a0d0e21e |
851 | case DIGIT: |
852 | while (s < strend) { |
853 | if (isDIGIT(*s)) { |
854 | if (tmp && regtry(prog, s)) |
855 | goto got_it; |
856 | else |
857 | tmp = doevery; |
2b69d0c2 |
858 | } |
a0d0e21e |
859 | else |
860 | tmp = 1; |
861 | s++; |
862 | } |
863 | break; |
a0ed51b3 |
864 | case DIGITUTF8: |
865 | while (s < strend) { |
dfe13c55 |
866 | if (swash_fetch(PL_utf8_digit,(U8*)s)) { |
a0ed51b3 |
867 | if (tmp && regtry(prog, s)) |
868 | goto got_it; |
869 | else |
870 | tmp = doevery; |
871 | } |
872 | else |
873 | tmp = 1; |
874 | s += UTF8SKIP(s); |
875 | } |
876 | break; |
a0d0e21e |
877 | case NDIGIT: |
878 | while (s < strend) { |
879 | if (!isDIGIT(*s)) { |
880 | if (tmp && regtry(prog, s)) |
881 | goto got_it; |
882 | else |
883 | tmp = doevery; |
a687059c |
884 | } |
a0d0e21e |
885 | else |
886 | tmp = 1; |
887 | s++; |
888 | } |
889 | break; |
a0ed51b3 |
890 | case NDIGITUTF8: |
891 | while (s < strend) { |
dfe13c55 |
892 | if (!swash_fetch(PL_utf8_digit,(U8*)s)) { |
a0ed51b3 |
893 | if (tmp && regtry(prog, s)) |
894 | goto got_it; |
895 | else |
896 | tmp = doevery; |
897 | } |
898 | else |
899 | tmp = 1; |
900 | s += UTF8SKIP(s); |
901 | } |
902 | break; |
a687059c |
903 | } |
a0d0e21e |
904 | } |
905 | else { |
c277df42 |
906 | dontbother = 0; |
907 | if (prog->float_substr != Nullsv) { /* Trim the end. */ |
908 | char *last; |
909 | I32 oldpos = scream_pos; |
910 | |
911 | if (screamer) { |
912 | last = screaminstr(screamer, prog->float_substr, s - strbeg, |
913 | end_shift, &scream_pos, 1); /* last one */ |
914 | if (!last) { |
915 | last = scream_olds; /* Only one occurence. */ |
916 | } |
a0ed51b3 |
917 | } |
918 | else { |
c277df42 |
919 | STRLEN len; |
920 | char *little = SvPV(prog->float_substr, len); |
19b4f81a |
921 | if (len) |
922 | last = rninstr(s, strend, little, little + len); |
923 | else |
924 | last = strend; /* matching `$' */ |
c277df42 |
925 | } |
926 | if (last == NULL) goto phooey; /* Should not happen! */ |
19b4f81a |
927 | dontbother = strend - last + prog->float_min_offset; |
c277df42 |
928 | } |
929 | if (minlen && (dontbother < minlen)) |
a0d0e21e |
930 | dontbother = minlen - 1; |
a0ed51b3 |
931 | strend -= dontbother; /* this one's always in bytes! */ |
a0d0e21e |
932 | /* We don't know much -- general case. */ |
a0ed51b3 |
933 | if (UTF) { |
934 | for (;;) { |
84df6dba |
935 | if (regtry(prog, s)) |
a0ed51b3 |
936 | goto got_it; |
a0ed51b3 |
937 | if (s >= strend) |
938 | break; |
939 | s += UTF8SKIP(s); |
940 | }; |
941 | } |
942 | else { |
943 | do { |
944 | if (regtry(prog, s)) |
945 | goto got_it; |
946 | } while (s++ < strend); |
947 | } |
a0d0e21e |
948 | } |
949 | |
950 | /* Failure. */ |
951 | goto phooey; |
a687059c |
952 | |
a0d0e21e |
953 | got_it: |
954 | prog->subbeg = strbeg; |
19b4f81a |
955 | prog->subend = PL_regeol; /* strend may have been modified */ |
3280af22 |
956 | RX_MATCH_TAINTED_set(prog, PL_reg_flags & RF_tainted); |
5f05dabc |
957 | |
958 | /* make sure $`, $&, $', and $digit will work later */ |
c277df42 |
959 | if (strbeg != prog->subbase) { /* second+ //g match. */ |
960 | if (!(flags & REXEC_COPY_STR)) { |
137443ea |
961 | if (prog->subbase) { |
962 | Safefree(prog->subbase); |
963 | prog->subbase = Nullch; |
964 | } |
965 | } |
966 | else { |
19b4f81a |
967 | I32 i = PL_regeol - startpos + (stringarg - strbeg); |
137443ea |
968 | s = savepvn(strbeg, i); |
969 | Safefree(prog->subbase); |
970 | prog->subbase = s; |
971 | prog->subbeg = prog->subbase; |
972 | prog->subend = prog->subbase + i; |
973 | s = prog->subbase + (stringarg - strbeg); |
974 | for (i = 0; i <= prog->nparens; i++) { |
975 | if (prog->endp[i]) { |
976 | prog->startp[i] = s + (prog->startp[i] - startpos); |
977 | prog->endp[i] = s + (prog->endp[i] - startpos); |
978 | } |
a0d0e21e |
979 | } |
980 | } |
a0d0e21e |
981 | } |
ce862d02 |
982 | /* Preserve the current value of $^R */ |
3280af22 |
983 | if (oreplsv != GvSV(PL_replgv)) { |
984 | sv_setsv(oreplsv, GvSV(PL_replgv));/* So that when GvSV(replgv) is |
ce862d02 |
985 | restored, the value remains |
986 | the same. */ |
987 | } |
a0d0e21e |
988 | return 1; |
989 | |
990 | phooey: |
a0d0e21e |
991 | return 0; |
a687059c |
992 | } |
993 | |
994 | /* |
995 | - regtry - try match at specific point |
996 | */ |
76e3520e |
997 | STATIC I32 /* 0 failure, 1 success */ |
8ac85365 |
998 | regtry(regexp *prog, char *startpos) |
a687059c |
999 | { |
c277df42 |
1000 | dTHR; |
a0d0e21e |
1001 | register I32 i; |
1002 | register char **sp; |
1003 | register char **ep; |
c277df42 |
1004 | CHECKPOINT lastcp; |
a0d0e21e |
1005 | |
3280af22 |
1006 | if ((prog->reganch & ROPT_EVAL_SEEN) && !PL_reg_eval_set) { |
1007 | PL_reg_eval_set = RS_init; |
ce862d02 |
1008 | DEBUG_r(DEBUG_s( |
c3464db5 |
1009 | PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %i\n", |
3280af22 |
1010 | PL_stack_sp - PL_stack_base); |
ce862d02 |
1011 | )); |
1012 | SAVEINT(cxstack[cxstack_ix].blk_oldsp); |
3280af22 |
1013 | cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base; |
ce862d02 |
1014 | /* Otherwise OP_NEXTSTATE will free whatever on stack now. */ |
1015 | SAVETMPS; |
1016 | /* Apparently this is not needed, judging by wantarray. */ |
1017 | /* SAVEINT(cxstack[cxstack_ix].blk_gimme); |
1018 | cxstack[cxstack_ix].blk_gimme = G_SCALAR; */ |
1019 | } |
3280af22 |
1020 | PL_reginput = startpos; |
1021 | PL_regstartp = prog->startp; |
1022 | PL_regendp = prog->endp; |
1023 | PL_reglastparen = &prog->lastparen; |
a0d0e21e |
1024 | prog->lastparen = 0; |
3280af22 |
1025 | PL_regsize = 0; |
1026 | if (PL_reg_start_tmpl <= prog->nparens) { |
1027 | PL_reg_start_tmpl = prog->nparens*3/2 + 3; |
1028 | if(PL_reg_start_tmp) |
1029 | Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*); |
c277df42 |
1030 | else |
3280af22 |
1031 | New(22,PL_reg_start_tmp, PL_reg_start_tmpl, char*); |
c277df42 |
1032 | } |
a0d0e21e |
1033 | |
1034 | sp = prog->startp; |
1035 | ep = prog->endp; |
1036 | if (prog->nparens) { |
1037 | for (i = prog->nparens; i >= 0; i--) { |
1038 | *sp++ = NULL; |
1039 | *ep++ = NULL; |
a687059c |
1040 | } |
a0d0e21e |
1041 | } |
c277df42 |
1042 | REGCP_SET; |
7e5428c5 |
1043 | if (regmatch(prog->program + 1)) { |
a0d0e21e |
1044 | prog->startp[0] = startpos; |
3280af22 |
1045 | prog->endp[0] = PL_reginput; |
a0d0e21e |
1046 | return 1; |
1047 | } |
c277df42 |
1048 | REGCP_UNWIND; |
1049 | return 0; |
a687059c |
1050 | } |
1051 | |
1052 | /* |
1053 | - regmatch - main matching routine |
1054 | * |
1055 | * Conceptually the strategy is simple: check to see whether the current |
1056 | * node matches, call self recursively to see whether the rest matches, |
1057 | * and then act accordingly. In practice we make some effort to avoid |
1058 | * recursion, in particular by going through "ordinary" nodes (that don't |
1059 | * need to know whether the rest of the match failed) by a loop instead of |
1060 | * by recursion. |
1061 | */ |
1062 | /* [lwall] I've hoisted the register declarations to the outer block in order to |
1063 | * maybe save a little bit of pushing and popping on the stack. It also takes |
1064 | * advantage of machines that use a register save mask on subroutine entry. |
1065 | */ |
76e3520e |
1066 | STATIC I32 /* 0 failure, 1 success */ |
c277df42 |
1067 | regmatch(regnode *prog) |
a687059c |
1068 | { |
c277df42 |
1069 | dTHR; |
1070 | register regnode *scan; /* Current node. */ |
1071 | regnode *next; /* Next node. */ |
1072 | regnode *inner; /* Next node in internal branch. */ |
c3464db5 |
1073 | register I32 nextchr; /* renamed nextchr - nextchar colides with |
1074 | function of same name */ |
a0d0e21e |
1075 | register I32 n; /* no or next */ |
1076 | register I32 ln; /* len or last */ |
1077 | register char *s; /* operand or save */ |
3280af22 |
1078 | register char *locinput = PL_reginput; |
c277df42 |
1079 | register I32 c1, c2, paren; /* case fold search, parenth */ |
1080 | int minmod = 0, sw = 0, logical = 0; |
4633a7c4 |
1081 | #ifdef DEBUGGING |
3280af22 |
1082 | PL_regindent++; |
4633a7c4 |
1083 | #endif |
a0d0e21e |
1084 | |
a0ed51b3 |
1085 | /* Note that nextchr is a byte even in UTF */ |
76e3520e |
1086 | nextchr = UCHARAT(locinput); |
a0d0e21e |
1087 | scan = prog; |
1088 | while (scan != NULL) { |
c277df42 |
1089 | #define sayNO_L (logical ? (logical = 0, sw = 0, goto cont) : sayNO) |
a687059c |
1090 | #ifdef DEBUGGING |
c277df42 |
1091 | # define sayYES goto yes |
1092 | # define sayNO goto no |
1093 | # define saySAME(x) if (x) goto yes; else goto no |
1094 | # define REPORT_CODE_OFF 24 |
4633a7c4 |
1095 | #else |
c277df42 |
1096 | # define sayYES return 1 |
1097 | # define sayNO return 0 |
1098 | # define saySAME(x) return x |
a687059c |
1099 | #endif |
c277df42 |
1100 | DEBUG_r( { |
1101 | SV *prop = sv_newmortal(); |
3280af22 |
1102 | int docolor = *PL_colors[0]; |
c277df42 |
1103 | int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */ |
3280af22 |
1104 | int l = (PL_regeol - locinput > taill ? taill : PL_regeol - locinput); |
1105 | int pref_len = (locinput - PL_bostr > (5 + taill) - l |
1106 | ? (5 + taill) - l : locinput - PL_bostr); |
8d300b32 |
1107 | int pref0_len = pref_len - (locinput - PL_reginput); |
c277df42 |
1108 | |
3280af22 |
1109 | if (l + pref_len < (5 + taill) && l < PL_regeol - locinput) |
1110 | l = ( PL_regeol - locinput > (5 + taill) - pref_len |
1111 | ? (5 + taill) - pref_len : PL_regeol - locinput); |
8d300b32 |
1112 | if (pref0_len < 0) |
1113 | pref0_len = 0; |
c277df42 |
1114 | regprop(prop, scan); |
1115 | PerlIO_printf(Perl_debug_log, |
8d300b32 |
1116 | "%4i <%s%.*s%s%s%.*s%s%s%s%.*s%s>%*s|%3d:%*s%s\n", |
3280af22 |
1117 | locinput - PL_bostr, |
8d300b32 |
1118 | PL_colors[4], pref0_len, |
1119 | locinput - pref_len, PL_colors[5], |
1120 | PL_colors[2], pref_len - pref0_len, |
1121 | locinput - pref_len + pref0_len, PL_colors[3], |
c277df42 |
1122 | (docolor ? "" : "> <"), |
3280af22 |
1123 | PL_colors[0], l, locinput, PL_colors[1], |
c277df42 |
1124 | 15 - l - pref_len + 1, |
1125 | "", |
3280af22 |
1126 | scan - PL_regprogram, PL_regindent*2, "", |
c277df42 |
1127 | SvPVX(prop)); |
1128 | } ); |
a687059c |
1129 | |
c277df42 |
1130 | next = scan + NEXT_OFF(scan); |
a0d0e21e |
1131 | if (next == scan) |
1132 | next = NULL; |
a687059c |
1133 | |
a0d0e21e |
1134 | switch (OP(scan)) { |
1135 | case BOL: |
3280af22 |
1136 | if (locinput == PL_bostr |
1137 | ? PL_regprev == '\n' |
1138 | : (PL_multiline && |
1139 | (nextchr || locinput < PL_regeol) && locinput[-1] == '\n') ) |
a0d0e21e |
1140 | { |
a0ed51b3 |
1141 | /* regtill = regbol; */ |
a0d0e21e |
1142 | break; |
1143 | } |
4633a7c4 |
1144 | sayNO; |
a0d0e21e |
1145 | case MBOL: |
3280af22 |
1146 | if (locinput == PL_bostr |
1147 | ? PL_regprev == '\n' |
1148 | : ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n') ) |
a0d0e21e |
1149 | { |
1150 | break; |
1151 | } |
4633a7c4 |
1152 | sayNO; |
a0d0e21e |
1153 | case SBOL: |
3280af22 |
1154 | if (locinput == PL_regbol && PL_regprev == '\n') |
a0d0e21e |
1155 | break; |
4633a7c4 |
1156 | sayNO; |
774d564b |
1157 | case GPOS: |
3280af22 |
1158 | if (locinput == PL_regbol) |
a0d0e21e |
1159 | break; |
4633a7c4 |
1160 | sayNO; |
a0d0e21e |
1161 | case EOL: |
3280af22 |
1162 | if (PL_multiline) |
a0d0e21e |
1163 | goto meol; |
1164 | else |
1165 | goto seol; |
1166 | case MEOL: |
1167 | meol: |
3280af22 |
1168 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') |
4633a7c4 |
1169 | sayNO; |
a0d0e21e |
1170 | break; |
1171 | case SEOL: |
1172 | seol: |
3280af22 |
1173 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') |
4633a7c4 |
1174 | sayNO; |
3280af22 |
1175 | if (PL_regeol - locinput > 1) |
4633a7c4 |
1176 | sayNO; |
a0d0e21e |
1177 | break; |
b85d18e9 |
1178 | case EOS: |
3280af22 |
1179 | if (PL_regeol != locinput) |
b85d18e9 |
1180 | sayNO; |
1181 | break; |
a0ed51b3 |
1182 | case SANYUTF8: |
1183 | if (nextchr & 0x80) { |
a176fa2a |
1184 | locinput += utf8skip[nextchr]; |
a0ed51b3 |
1185 | if (locinput > PL_regeol) |
1186 | sayNO; |
1187 | nextchr = UCHARAT(locinput); |
1188 | break; |
1189 | } |
1190 | if (!nextchr && locinput >= PL_regeol) |
1191 | sayNO; |
1192 | nextchr = UCHARAT(++locinput); |
1193 | break; |
a0d0e21e |
1194 | case SANY: |
3280af22 |
1195 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 |
1196 | sayNO; |
76e3520e |
1197 | nextchr = UCHARAT(++locinput); |
a0d0e21e |
1198 | break; |
a0ed51b3 |
1199 | case ANYUTF8: |
1200 | if (nextchr & 0x80) { |
a176fa2a |
1201 | locinput += utf8skip[nextchr]; |
a0ed51b3 |
1202 | if (locinput > PL_regeol) |
1203 | sayNO; |
1204 | nextchr = UCHARAT(locinput); |
1205 | break; |
1206 | } |
1207 | if (!nextchr && locinput >= PL_regeol || nextchr == '\n') |
1208 | sayNO; |
1209 | nextchr = UCHARAT(++locinput); |
1210 | break; |
a0d0e21e |
1211 | case ANY: |
3280af22 |
1212 | if (!nextchr && locinput >= PL_regeol || nextchr == '\n') |
4633a7c4 |
1213 | sayNO; |
76e3520e |
1214 | nextchr = UCHARAT(++locinput); |
a0d0e21e |
1215 | break; |
bbce6d69 |
1216 | case EXACT: |
161b471a |
1217 | s = (char *) OPERAND(scan); |
c277df42 |
1218 | ln = UCHARAT(s++); |
a0d0e21e |
1219 | /* Inline the first character, for speed. */ |
76e3520e |
1220 | if (UCHARAT(s) != nextchr) |
4633a7c4 |
1221 | sayNO; |
3280af22 |
1222 | if (PL_regeol - locinput < ln) |
4633a7c4 |
1223 | sayNO; |
36477c24 |
1224 | if (ln > 1 && memNE(s, locinput, ln)) |
4633a7c4 |
1225 | sayNO; |
a0d0e21e |
1226 | locinput += ln; |
76e3520e |
1227 | nextchr = UCHARAT(locinput); |
bbce6d69 |
1228 | break; |
1229 | case EXACTFL: |
3280af22 |
1230 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
1231 | /* FALL THROUGH */ |
1232 | case EXACTF: |
161b471a |
1233 | s = (char *) OPERAND(scan); |
c277df42 |
1234 | ln = UCHARAT(s++); |
a0ed51b3 |
1235 | |
1236 | if (UTF) { |
1237 | char *l = locinput; |
1238 | char *e = s + ln; |
1239 | c1 = OP(scan) == EXACTF; |
1240 | while (s < e) { |
1241 | if (l >= PL_regeol) |
1242 | sayNO; |
dfe13c55 |
1243 | if (utf8_to_uv((U8*)s, 0) != (c1 ? |
1244 | toLOWER_utf8((U8*)l) : |
1245 | toLOWER_LC_utf8((U8*)l))) |
1246 | { |
a0ed51b3 |
1247 | sayNO; |
dfe13c55 |
1248 | } |
a0ed51b3 |
1249 | s += UTF8SKIP(s); |
1250 | l += UTF8SKIP(l); |
1251 | } |
1252 | locinput = l; |
1253 | nextchr = UCHARAT(locinput); |
1254 | break; |
1255 | } |
1256 | |
bbce6d69 |
1257 | /* Inline the first character, for speed. */ |
76e3520e |
1258 | if (UCHARAT(s) != nextchr && |
bbce6d69 |
1259 | UCHARAT(s) != ((OP(scan) == EXACTF) |
76e3520e |
1260 | ? fold : fold_locale)[nextchr]) |
bbce6d69 |
1261 | sayNO; |
3280af22 |
1262 | if (PL_regeol - locinput < ln) |
bbce6d69 |
1263 | sayNO; |
5f05dabc |
1264 | if (ln > 1 && (OP(scan) == EXACTF |
1265 | ? ibcmp(s, locinput, ln) |
1266 | : ibcmp_locale(s, locinput, ln))) |
bbce6d69 |
1267 | sayNO; |
1268 | locinput += ln; |
76e3520e |
1269 | nextchr = UCHARAT(locinput); |
a0d0e21e |
1270 | break; |
a0ed51b3 |
1271 | case ANYOFUTF8: |
1272 | s = (char *) OPERAND(scan); |
1273 | if (!REGINCLASSUTF8(scan, (U8*)locinput)) |
1274 | sayNO; |
1275 | if (locinput >= PL_regeol) |
1276 | sayNO; |
a176fa2a |
1277 | locinput += utf8skip[nextchr]; |
a0ed51b3 |
1278 | nextchr = UCHARAT(locinput); |
1279 | break; |
a0d0e21e |
1280 | case ANYOF: |
161b471a |
1281 | s = (char *) OPERAND(scan); |
76e3520e |
1282 | if (nextchr < 0) |
1283 | nextchr = UCHARAT(locinput); |
873ef191 |
1284 | if (!REGINCLASS(s, nextchr)) |
4633a7c4 |
1285 | sayNO; |
3280af22 |
1286 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 |
1287 | sayNO; |
76e3520e |
1288 | nextchr = UCHARAT(++locinput); |
a0d0e21e |
1289 | break; |
bbce6d69 |
1290 | case ALNUML: |
3280af22 |
1291 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
1292 | /* FALL THROUGH */ |
a0d0e21e |
1293 | case ALNUM: |
76e3520e |
1294 | if (!nextchr) |
4633a7c4 |
1295 | sayNO; |
bbce6d69 |
1296 | if (!(OP(scan) == ALNUM |
76e3520e |
1297 | ? isALNUM(nextchr) : isALNUM_LC(nextchr))) |
4633a7c4 |
1298 | sayNO; |
76e3520e |
1299 | nextchr = UCHARAT(++locinput); |
a0d0e21e |
1300 | break; |
a0ed51b3 |
1301 | case ALNUMLUTF8: |
1302 | PL_reg_flags |= RF_tainted; |
1303 | /* FALL THROUGH */ |
1304 | case ALNUMUTF8: |
1305 | if (!nextchr) |
1306 | sayNO; |
1307 | if (nextchr & 0x80) { |
1308 | if (!(OP(scan) == ALNUMUTF8 |
dfe13c55 |
1309 | ? swash_fetch(PL_utf8_alnum, (U8*)locinput) |
1310 | : isALNUM_LC_utf8((U8*)locinput))) |
1311 | { |
a0ed51b3 |
1312 | sayNO; |
dfe13c55 |
1313 | } |
a176fa2a |
1314 | locinput += utf8skip[nextchr]; |
a0ed51b3 |
1315 | nextchr = UCHARAT(locinput); |
1316 | break; |
1317 | } |
1318 | if (!(OP(scan) == ALNUMUTF8 |
1319 | ? isALNUM(nextchr) : isALNUM_LC(nextchr))) |
1320 | sayNO; |
1321 | nextchr = UCHARAT(++locinput); |
1322 | break; |
bbce6d69 |
1323 | case NALNUML: |
3280af22 |
1324 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
1325 | /* FALL THROUGH */ |
a0d0e21e |
1326 | case NALNUM: |
3280af22 |
1327 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 |
1328 | sayNO; |
bbce6d69 |
1329 | if (OP(scan) == NALNUM |
76e3520e |
1330 | ? isALNUM(nextchr) : isALNUM_LC(nextchr)) |
4633a7c4 |
1331 | sayNO; |
76e3520e |
1332 | nextchr = UCHARAT(++locinput); |
a0d0e21e |
1333 | break; |
a0ed51b3 |
1334 | case NALNUMLUTF8: |
1335 | PL_reg_flags |= RF_tainted; |
1336 | /* FALL THROUGH */ |
1337 | case NALNUMUTF8: |
1338 | if (!nextchr && locinput >= PL_regeol) |
1339 | sayNO; |
1340 | if (nextchr & 0x80) { |
1341 | if (OP(scan) == NALNUMUTF8 |
dfe13c55 |
1342 | ? swash_fetch(PL_utf8_alnum, (U8*)locinput) |
1343 | : isALNUM_LC_utf8((U8*)locinput)) |
1344 | { |
a0ed51b3 |
1345 | sayNO; |
dfe13c55 |
1346 | } |
a176fa2a |
1347 | locinput += utf8skip[nextchr]; |
a0ed51b3 |
1348 | nextchr = UCHARAT(locinput); |
1349 | break; |
1350 | } |
1351 | if (OP(scan) == NALNUMUTF8 |
1352 | ? isALNUM(nextchr) : isALNUM_LC(nextchr)) |
1353 | sayNO; |
1354 | nextchr = UCHARAT(++locinput); |
1355 | break; |
bbce6d69 |
1356 | case BOUNDL: |
1357 | case NBOUNDL: |
3280af22 |
1358 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
1359 | /* FALL THROUGH */ |
a0d0e21e |
1360 | case BOUND: |
bbce6d69 |
1361 | case NBOUND: |
1362 | /* was last char in word? */ |
3280af22 |
1363 | ln = (locinput != PL_regbol) ? UCHARAT(locinput - 1) : PL_regprev; |
bbce6d69 |
1364 | if (OP(scan) == BOUND || OP(scan) == NBOUND) { |
1365 | ln = isALNUM(ln); |
76e3520e |
1366 | n = isALNUM(nextchr); |
bbce6d69 |
1367 | } |
1368 | else { |
1369 | ln = isALNUM_LC(ln); |
76e3520e |
1370 | n = isALNUM_LC(nextchr); |
bbce6d69 |
1371 | } |
95bac841 |
1372 | if (((!ln) == (!n)) == (OP(scan) == BOUND || OP(scan) == BOUNDL)) |
4633a7c4 |
1373 | sayNO; |
a0d0e21e |
1374 | break; |
a0ed51b3 |
1375 | case BOUNDLUTF8: |
1376 | case NBOUNDLUTF8: |
1377 | PL_reg_flags |= RF_tainted; |
1378 | /* FALL THROUGH */ |
1379 | case BOUNDUTF8: |
1380 | case NBOUNDUTF8: |
1381 | /* was last char in word? */ |
dfe13c55 |
1382 | ln = (locinput != PL_regbol) |
1383 | ? utf8_to_uv(reghop((U8*)locinput, -1), 0) : PL_regprev; |
a0ed51b3 |
1384 | if (OP(scan) == BOUNDUTF8 || OP(scan) == NBOUNDUTF8) { |
1385 | ln = isALNUM_uni(ln); |
dfe13c55 |
1386 | n = swash_fetch(PL_utf8_alnum, (U8*)locinput); |
a0ed51b3 |
1387 | } |
1388 | else { |
1389 | ln = isALNUM_LC_uni(ln); |
dfe13c55 |
1390 | n = isALNUM_LC_utf8((U8*)locinput); |
a0ed51b3 |
1391 | } |
1392 | if (((!ln) == (!n)) == (OP(scan) == BOUNDUTF8 || OP(scan) == BOUNDLUTF8)) |
1393 | sayNO; |
1394 | break; |
bbce6d69 |
1395 | case SPACEL: |
3280af22 |
1396 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
1397 | /* FALL THROUGH */ |
a0d0e21e |
1398 | case SPACE: |
3280af22 |
1399 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 |
1400 | sayNO; |
bbce6d69 |
1401 | if (!(OP(scan) == SPACE |
76e3520e |
1402 | ? isSPACE(nextchr) : isSPACE_LC(nextchr))) |
4633a7c4 |
1403 | sayNO; |
76e3520e |
1404 | nextchr = UCHARAT(++locinput); |
a0d0e21e |
1405 | break; |
a0ed51b3 |
1406 | case SPACELUTF8: |
1407 | PL_reg_flags |= RF_tainted; |
1408 | /* FALL THROUGH */ |
1409 | case SPACEUTF8: |
1410 | if (!nextchr && locinput >= PL_regeol) |
1411 | sayNO; |
1412 | if (nextchr & 0x80) { |
1413 | if (!(OP(scan) == SPACEUTF8 |
dfe13c55 |
1414 | ? swash_fetch(PL_utf8_space,(U8*)locinput) |
1415 | : isSPACE_LC_utf8((U8*)locinput))) |
1416 | { |
a0ed51b3 |
1417 | sayNO; |
dfe13c55 |
1418 | } |
a176fa2a |
1419 | locinput += utf8skip[nextchr]; |
a0ed51b3 |
1420 | nextchr = UCHARAT(locinput); |
1421 | break; |
1422 | } |
1423 | if (!(OP(scan) == SPACEUTF8 |
1424 | ? isSPACE(nextchr) : isSPACE_LC(nextchr))) |
1425 | sayNO; |
1426 | nextchr = UCHARAT(++locinput); |
1427 | break; |
bbce6d69 |
1428 | case NSPACEL: |
3280af22 |
1429 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
1430 | /* FALL THROUGH */ |
a0d0e21e |
1431 | case NSPACE: |
76e3520e |
1432 | if (!nextchr) |
4633a7c4 |
1433 | sayNO; |
bbce6d69 |
1434 | if (OP(scan) == SPACE |
76e3520e |
1435 | ? isSPACE(nextchr) : isSPACE_LC(nextchr)) |
4633a7c4 |
1436 | sayNO; |
76e3520e |
1437 | nextchr = UCHARAT(++locinput); |
a0d0e21e |
1438 | break; |
a0ed51b3 |
1439 | case NSPACELUTF8: |
1440 | PL_reg_flags |= RF_tainted; |
1441 | /* FALL THROUGH */ |
1442 | case NSPACEUTF8: |
1443 | if (!nextchr) |
1444 | sayNO; |
1445 | if (nextchr & 0x80) { |
1446 | if (OP(scan) == NSPACEUTF8 |
dfe13c55 |
1447 | ? swash_fetch(PL_utf8_space,(U8*)locinput) |
1448 | : isSPACE_LC_utf8((U8*)locinput)) |
1449 | { |
a0ed51b3 |
1450 | sayNO; |
dfe13c55 |
1451 | } |
a176fa2a |
1452 | locinput += utf8skip[nextchr]; |
a0ed51b3 |
1453 | nextchr = UCHARAT(locinput); |
1454 | break; |
1455 | } |
1456 | if (OP(scan) == NSPACEUTF8 |
1457 | ? isSPACE(nextchr) : isSPACE_LC(nextchr)) |
1458 | sayNO; |
1459 | nextchr = UCHARAT(++locinput); |
1460 | break; |
a0d0e21e |
1461 | case DIGIT: |
76e3520e |
1462 | if (!isDIGIT(nextchr)) |
4633a7c4 |
1463 | sayNO; |
76e3520e |
1464 | nextchr = UCHARAT(++locinput); |
a0d0e21e |
1465 | break; |
a0ed51b3 |
1466 | case DIGITUTF8: |
1467 | if (nextchr & 0x80) { |
dfe13c55 |
1468 | if (!(swash_fetch(PL_utf8_digit,(U8*)locinput))) |
a0ed51b3 |
1469 | sayNO; |
a176fa2a |
1470 | locinput += utf8skip[nextchr]; |
a0ed51b3 |
1471 | nextchr = UCHARAT(locinput); |
1472 | break; |
1473 | } |
1474 | if (!isDIGIT(nextchr)) |
1475 | sayNO; |
1476 | nextchr = UCHARAT(++locinput); |
1477 | break; |
a0d0e21e |
1478 | case NDIGIT: |
3280af22 |
1479 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 |
1480 | sayNO; |
76e3520e |
1481 | if (isDIGIT(nextchr)) |
4633a7c4 |
1482 | sayNO; |
76e3520e |
1483 | nextchr = UCHARAT(++locinput); |
a0d0e21e |
1484 | break; |
a0ed51b3 |
1485 | case NDIGITUTF8: |
1486 | if (!nextchr && locinput >= PL_regeol) |
1487 | sayNO; |
1488 | if (nextchr & 0x80) { |
dfe13c55 |
1489 | if (swash_fetch(PL_utf8_digit,(U8*)locinput)) |
a0ed51b3 |
1490 | sayNO; |
a176fa2a |
1491 | locinput += utf8skip[nextchr]; |
a0ed51b3 |
1492 | nextchr = UCHARAT(locinput); |
1493 | break; |
1494 | } |
1495 | if (isDIGIT(nextchr)) |
1496 | sayNO; |
1497 | nextchr = UCHARAT(++locinput); |
1498 | break; |
1499 | case CLUMP: |
dfe13c55 |
1500 | if (locinput >= PL_regeol || swash_fetch(PL_utf8_mark,(U8*)locinput)) |
a0ed51b3 |
1501 | sayNO; |
a176fa2a |
1502 | locinput += utf8skip[nextchr]; |
dfe13c55 |
1503 | while (locinput < PL_regeol && swash_fetch(PL_utf8_mark,(U8*)locinput)) |
a0ed51b3 |
1504 | locinput += UTF8SKIP(locinput); |
1505 | if (locinput > PL_regeol) |
1506 | sayNO; |
1507 | nextchr = UCHARAT(locinput); |
1508 | break; |
c8756f30 |
1509 | case REFFL: |
3280af22 |
1510 | PL_reg_flags |= RF_tainted; |
c8756f30 |
1511 | /* FALL THROUGH */ |
c277df42 |
1512 | case REF: |
c8756f30 |
1513 | case REFF: |
c277df42 |
1514 | n = ARG(scan); /* which paren pair */ |
3280af22 |
1515 | s = PL_regstartp[n]; |
1516 | if (*PL_reglastparen < n || !s) |
af3f8c16 |
1517 | sayNO; /* Do not match unless seen CLOSEn. */ |
3280af22 |
1518 | if (s == PL_regendp[n]) |
a0d0e21e |
1519 | break; |
a0ed51b3 |
1520 | |
1521 | if (UTF && OP(scan) != REF) { /* REF can do byte comparison */ |
1522 | char *l = locinput; |
1523 | char *e = PL_regendp[n]; |
1524 | /* |
1525 | * Note that we can't do the "other character" lookup trick as |
1526 | * in the 8-bit case (no pun intended) because in Unicode we |
1527 | * have to map both upper and title case to lower case. |
1528 | */ |
1529 | if (OP(scan) == REFF) { |
1530 | while (s < e) { |
1531 | if (l >= PL_regeol) |
1532 | sayNO; |
dfe13c55 |
1533 | if (toLOWER_utf8((U8*)s) != toLOWER_utf8((U8*)l)) |
a0ed51b3 |
1534 | sayNO; |
1535 | s += UTF8SKIP(s); |
1536 | l += UTF8SKIP(l); |
1537 | } |
1538 | } |
1539 | else { |
1540 | while (s < e) { |
1541 | if (l >= PL_regeol) |
1542 | sayNO; |
dfe13c55 |
1543 | if (toLOWER_LC_utf8((U8*)s) != toLOWER_LC_utf8((U8*)l)) |
a0ed51b3 |
1544 | sayNO; |
1545 | s += UTF8SKIP(s); |
1546 | l += UTF8SKIP(l); |
1547 | } |
1548 | } |
1549 | locinput = l; |
1550 | nextchr = UCHARAT(locinput); |
1551 | break; |
1552 | } |
1553 | |
a0d0e21e |
1554 | /* Inline the first character, for speed. */ |
76e3520e |
1555 | if (UCHARAT(s) != nextchr && |
c8756f30 |
1556 | (OP(scan) == REF || |
1557 | (UCHARAT(s) != ((OP(scan) == REFF |
76e3520e |
1558 | ? fold : fold_locale)[nextchr])))) |
4633a7c4 |
1559 | sayNO; |
3280af22 |
1560 | ln = PL_regendp[n] - s; |
1561 | if (locinput + ln > PL_regeol) |
4633a7c4 |
1562 | sayNO; |
c8756f30 |
1563 | if (ln > 1 && (OP(scan) == REF |
1564 | ? memNE(s, locinput, ln) |
1565 | : (OP(scan) == REFF |
1566 | ? ibcmp(s, locinput, ln) |
1567 | : ibcmp_locale(s, locinput, ln)))) |
4633a7c4 |
1568 | sayNO; |
a0d0e21e |
1569 | locinput += ln; |
76e3520e |
1570 | nextchr = UCHARAT(locinput); |
a0d0e21e |
1571 | break; |
1572 | |
1573 | case NOTHING: |
c277df42 |
1574 | case TAIL: |
a0d0e21e |
1575 | break; |
1576 | case BACK: |
1577 | break; |
c277df42 |
1578 | case EVAL: |
1579 | { |
1580 | dSP; |
533c011a |
1581 | OP_4tree *oop = PL_op; |
3280af22 |
1582 | COP *ocurcop = PL_curcop; |
1583 | SV **ocurpad = PL_curpad; |
c277df42 |
1584 | SV *ret; |
1585 | |
1586 | n = ARG(scan); |
533c011a |
1587 | PL_op = (OP_4tree*)PL_regdata->data[n]; |
1588 | DEBUG_r( PerlIO_printf(Perl_debug_log, " re_eval 0x%x\n", PL_op) ); |
3280af22 |
1589 | PL_curpad = AvARRAY((AV*)PL_regdata->data[n + 1]); |
c277df42 |
1590 | |
76e3520e |
1591 | CALLRUNOPS(); /* Scalar context. */ |
c277df42 |
1592 | SPAGAIN; |
1593 | ret = POPs; |
1594 | PUTBACK; |
1595 | |
0f5d15d6 |
1596 | PL_op = oop; |
1597 | PL_curpad = ocurpad; |
1598 | PL_curcop = ocurcop; |
c277df42 |
1599 | if (logical) { |
0f5d15d6 |
1600 | if (logical == 2) { /* Postponed subexpression. */ |
1601 | regexp *re; |
1602 | my_magic mg = Null(my_magic); |
1603 | re_cc_state state; |
1604 | CURCUR cctmp; |
1605 | CHECKPOINT cp, lastcp; |
1606 | |
1607 | if(SvROK(ret) || SvRMAGICAL(ret)) { |
1608 | SV *sv = SvROK(ret) ? SvRV(ret) : ret; |
1609 | |
1610 | if(SvMAGICAL(sv)) |
1611 | mg = mg_find(sv, 'r'); |
1612 | } |
1613 | if (mg) { |
1614 | re = (regexp *)mg->mg_obj; |
1615 | ReREFCNT_inc(re); |
1616 | } |
1617 | else { |
1618 | STRLEN len; |
1619 | char *t = SvPV(ret, len); |
1620 | PMOP pm; |
1621 | char *oprecomp = PL_regprecomp; |
1622 | I32 osize = PL_regsize; |
1623 | I32 onpar = PL_regnpar; |
1624 | |
1625 | pm.op_pmflags = 0; |
1626 | re = CALLREGCOMP(t, t + len, &pm); |
1627 | if (!(SvFLAGS(ret) |
1628 | & (SVs_TEMP | SVs_PADTMP | SVf_READONLY))) |
1629 | sv_magic(ret,(SV*)ReREFCNT_inc(re),'r',0,0); |
1630 | PL_regprecomp = oprecomp; |
1631 | PL_regsize = osize; |
1632 | PL_regnpar = onpar; |
1633 | } |
1634 | DEBUG_r( |
1635 | PerlIO_printf(Perl_debug_log, |
1636 | "Entering embedded `%s%.60s%s%s'\n", |
1637 | PL_colors[0], |
1638 | re->precomp, |
1639 | PL_colors[1], |
1640 | (strlen(re->precomp) > 60 ? "..." : "")) |
1641 | ); |
1642 | state.node = next; |
1643 | state.prev = PL_reg_call_cc; |
1644 | state.cc = PL_regcc; |
1645 | state.re = PL_reg_re; |
1646 | |
1647 | cctmp.cur = 0; |
1648 | cctmp.oldcc = 0; |
1649 | PL_regcc = &cctmp; |
1650 | |
1651 | cp = regcppush(0); /* Save *all* the positions. */ |
1652 | REGCP_SET; |
1653 | cache_re(re); |
1654 | state.ss = PL_savestack_ix; |
1655 | *PL_reglastparen = 0; |
1656 | PL_reg_call_cc = &state; |
1657 | PL_reginput = locinput; |
1658 | if (regmatch(re->program + 1)) { |
1659 | ReREFCNT_dec(re); |
1660 | regcpblow(cp); |
1661 | sayYES; |
1662 | } |
1663 | DEBUG_r( |
1664 | PerlIO_printf(Perl_debug_log, |
1665 | "%*s failed...\n", |
1666 | REPORT_CODE_OFF+PL_regindent*2, "") |
1667 | ); |
1668 | ReREFCNT_dec(re); |
1669 | REGCP_UNWIND; |
1670 | regcppop(); |
1671 | PL_reg_call_cc = state.prev; |
1672 | PL_regcc = state.cc; |
1673 | PL_reg_re = state.re; |
1674 | sayNO; |
1675 | } |
c277df42 |
1676 | sw = SvTRUE(ret); |
0f5d15d6 |
1677 | logical = 0; |
a0ed51b3 |
1678 | } |
1679 | else |
3280af22 |
1680 | sv_setsv(save_scalar(PL_replgv), ret); |
c277df42 |
1681 | break; |
1682 | } |
a0d0e21e |
1683 | case OPEN: |
c277df42 |
1684 | n = ARG(scan); /* which paren pair */ |
3280af22 |
1685 | PL_reg_start_tmp[n] = locinput; |
1686 | if (n > PL_regsize) |
1687 | PL_regsize = n; |
a0d0e21e |
1688 | break; |
1689 | case CLOSE: |
c277df42 |
1690 | n = ARG(scan); /* which paren pair */ |
3280af22 |
1691 | PL_regstartp[n] = PL_reg_start_tmp[n]; |
1692 | PL_regendp[n] = locinput; |
1693 | if (n > *PL_reglastparen) |
1694 | *PL_reglastparen = n; |
a0d0e21e |
1695 | break; |
c277df42 |
1696 | case GROUPP: |
1697 | n = ARG(scan); /* which paren pair */ |
3280af22 |
1698 | sw = (*PL_reglastparen >= n && PL_regendp[n] != NULL); |
c277df42 |
1699 | break; |
1700 | case IFTHEN: |
1701 | if (sw) |
1702 | next = NEXTOPER(NEXTOPER(scan)); |
1703 | else { |
1704 | next = scan + ARG(scan); |
1705 | if (OP(next) == IFTHEN) /* Fake one. */ |
1706 | next = NEXTOPER(NEXTOPER(next)); |
1707 | } |
1708 | break; |
1709 | case LOGICAL: |
0f5d15d6 |
1710 | logical = scan->flags; |
c277df42 |
1711 | break; |
a0d0e21e |
1712 | case CURLYX: { |
1713 | CURCUR cc; |
3280af22 |
1714 | CHECKPOINT cp = PL_savestack_ix; |
c277df42 |
1715 | |
1716 | if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */ |
1717 | next += ARG(next); |
3280af22 |
1718 | cc.oldcc = PL_regcc; |
1719 | PL_regcc = &cc; |
1720 | cc.parenfloor = *PL_reglastparen; |
a0d0e21e |
1721 | cc.cur = -1; |
1722 | cc.min = ARG1(scan); |
1723 | cc.max = ARG2(scan); |
c277df42 |
1724 | cc.scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS; |
a0d0e21e |
1725 | cc.next = next; |
1726 | cc.minmod = minmod; |
1727 | cc.lastloc = 0; |
3280af22 |
1728 | PL_reginput = locinput; |
a0d0e21e |
1729 | n = regmatch(PREVOPER(next)); /* start on the WHILEM */ |
1730 | regcpblow(cp); |
3280af22 |
1731 | PL_regcc = cc.oldcc; |
4633a7c4 |
1732 | saySAME(n); |
a0d0e21e |
1733 | } |
1734 | /* NOT REACHED */ |
1735 | case WHILEM: { |
1736 | /* |
1737 | * This is really hard to understand, because after we match |
1738 | * what we're trying to match, we must make sure the rest of |
1739 | * the RE is going to match for sure, and to do that we have |
1740 | * to go back UP the parse tree by recursing ever deeper. And |
1741 | * if it fails, we have to reset our parent's current state |
1742 | * that we can try again after backing off. |
1743 | */ |
1744 | |
c277df42 |
1745 | CHECKPOINT cp, lastcp; |
3280af22 |
1746 | CURCUR* cc = PL_regcc; |
c277df42 |
1747 | char *lastloc = cc->lastloc; /* Detection of 0-len. */ |
1748 | |
4633a7c4 |
1749 | n = cc->cur + 1; /* how many we know we matched */ |
3280af22 |
1750 | PL_reginput = locinput; |
a0d0e21e |
1751 | |
c277df42 |
1752 | DEBUG_r( |
1753 | PerlIO_printf(Perl_debug_log, |
1754 | "%*s %ld out of %ld..%ld cc=%lx\n", |
3280af22 |
1755 | REPORT_CODE_OFF+PL_regindent*2, "", |
c277df42 |
1756 | (long)n, (long)cc->min, |
1757 | (long)cc->max, (long)cc) |
1758 | ); |
4633a7c4 |
1759 | |
a0d0e21e |
1760 | /* If degenerate scan matches "", assume scan done. */ |
1761 | |
579cf2c3 |
1762 | if (locinput == cc->lastloc && n >= cc->min) { |
3280af22 |
1763 | PL_regcc = cc->oldcc; |
1764 | ln = PL_regcc->cur; |
c277df42 |
1765 | DEBUG_r( |
c3464db5 |
1766 | PerlIO_printf(Perl_debug_log, |
1767 | "%*s empty match detected, try continuation...\n", |
3280af22 |
1768 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 |
1769 | ); |
a0d0e21e |
1770 | if (regmatch(cc->next)) |
4633a7c4 |
1771 | sayYES; |
c277df42 |
1772 | DEBUG_r( |
c3464db5 |
1773 | PerlIO_printf(Perl_debug_log, |
1774 | "%*s failed...\n", |
3280af22 |
1775 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 |
1776 | ); |
3280af22 |
1777 | PL_regcc->cur = ln; |
1778 | PL_regcc = cc; |
4633a7c4 |
1779 | sayNO; |
a0d0e21e |
1780 | } |
1781 | |
1782 | /* First just match a string of min scans. */ |
1783 | |
1784 | if (n < cc->min) { |
1785 | cc->cur = n; |
1786 | cc->lastloc = locinput; |
4633a7c4 |
1787 | if (regmatch(cc->scan)) |
1788 | sayYES; |
1789 | cc->cur = n - 1; |
c277df42 |
1790 | cc->lastloc = lastloc; |
1791 | DEBUG_r( |
c3464db5 |
1792 | PerlIO_printf(Perl_debug_log, |
1793 | "%*s failed...\n", |
3280af22 |
1794 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 |
1795 | ); |
4633a7c4 |
1796 | sayNO; |
a0d0e21e |
1797 | } |
1798 | |
1799 | /* Prefer next over scan for minimal matching. */ |
1800 | |
1801 | if (cc->minmod) { |
3280af22 |
1802 | PL_regcc = cc->oldcc; |
1803 | ln = PL_regcc->cur; |
5f05dabc |
1804 | cp = regcppush(cc->parenfloor); |
c277df42 |
1805 | REGCP_SET; |
5f05dabc |
1806 | if (regmatch(cc->next)) { |
c277df42 |
1807 | regcpblow(cp); |
4633a7c4 |
1808 | sayYES; /* All done. */ |
5f05dabc |
1809 | } |
c277df42 |
1810 | REGCP_UNWIND; |
5f05dabc |
1811 | regcppop(); |
3280af22 |
1812 | PL_regcc->cur = ln; |
1813 | PL_regcc = cc; |
a0d0e21e |
1814 | |
c277df42 |
1815 | if (n >= cc->max) { /* Maximum greed exceeded? */ |
599cee73 |
1816 | if (ckWARN(WARN_UNSAFE) && n >= REG_INFTY |
3280af22 |
1817 | && !(PL_reg_flags & RF_warned)) { |
1818 | PL_reg_flags |= RF_warned; |
599cee73 |
1819 | warner(WARN_UNSAFE, "%s limit (%d) exceeded", |
2f3ca594 |
1820 | "Complex regular subexpression recursion", |
1821 | REG_INFTY - 1); |
c277df42 |
1822 | } |
4633a7c4 |
1823 | sayNO; |
c277df42 |
1824 | } |
a687059c |
1825 | |
c277df42 |
1826 | DEBUG_r( |
c3464db5 |
1827 | PerlIO_printf(Perl_debug_log, |
1828 | "%*s trying longer...\n", |
3280af22 |
1829 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 |
1830 | ); |
a0d0e21e |
1831 | /* Try scanning more and see if it helps. */ |
3280af22 |
1832 | PL_reginput = locinput; |
a0d0e21e |
1833 | cc->cur = n; |
1834 | cc->lastloc = locinput; |
5f05dabc |
1835 | cp = regcppush(cc->parenfloor); |
c277df42 |
1836 | REGCP_SET; |
5f05dabc |
1837 | if (regmatch(cc->scan)) { |
c277df42 |
1838 | regcpblow(cp); |
4633a7c4 |
1839 | sayYES; |
5f05dabc |
1840 | } |
c277df42 |
1841 | DEBUG_r( |
c3464db5 |
1842 | PerlIO_printf(Perl_debug_log, |
1843 | "%*s failed...\n", |
3280af22 |
1844 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 |
1845 | ); |
1846 | REGCP_UNWIND; |
5f05dabc |
1847 | regcppop(); |
4633a7c4 |
1848 | cc->cur = n - 1; |
c277df42 |
1849 | cc->lastloc = lastloc; |
4633a7c4 |
1850 | sayNO; |
a0d0e21e |
1851 | } |
1852 | |
1853 | /* Prefer scan over next for maximal matching. */ |
1854 | |
1855 | if (n < cc->max) { /* More greed allowed? */ |
5f05dabc |
1856 | cp = regcppush(cc->parenfloor); |
a0d0e21e |
1857 | cc->cur = n; |
1858 | cc->lastloc = locinput; |
c277df42 |
1859 | REGCP_SET; |
5f05dabc |
1860 | if (regmatch(cc->scan)) { |
c277df42 |
1861 | regcpblow(cp); |
4633a7c4 |
1862 | sayYES; |
5f05dabc |
1863 | } |
c277df42 |
1864 | REGCP_UNWIND; |
a0d0e21e |
1865 | regcppop(); /* Restore some previous $<digit>s? */ |
3280af22 |
1866 | PL_reginput = locinput; |
c277df42 |
1867 | DEBUG_r( |
c3464db5 |
1868 | PerlIO_printf(Perl_debug_log, |
1869 | "%*s failed, try continuation...\n", |
3280af22 |
1870 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 |
1871 | ); |
1872 | } |
599cee73 |
1873 | if (ckWARN(WARN_UNSAFE) && n >= REG_INFTY |
1874 | && !(PL_reg_flags & RF_warned)) { |
3280af22 |
1875 | PL_reg_flags |= RF_warned; |
599cee73 |
1876 | warner(WARN_UNSAFE, "%s limit (%d) exceeded", |
cb5d145d |
1877 | "Complex regular subexpression recursion", |
1878 | REG_INFTY - 1); |
a0d0e21e |
1879 | } |
1880 | |
1881 | /* Failed deeper matches of scan, so see if this one works. */ |
3280af22 |
1882 | PL_regcc = cc->oldcc; |
1883 | ln = PL_regcc->cur; |
a0d0e21e |
1884 | if (regmatch(cc->next)) |
4633a7c4 |
1885 | sayYES; |
c277df42 |
1886 | DEBUG_r( |
c3464db5 |
1887 | PerlIO_printf(Perl_debug_log, "%*s failed...\n", |
3280af22 |
1888 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 |
1889 | ); |
3280af22 |
1890 | PL_regcc->cur = ln; |
1891 | PL_regcc = cc; |
4633a7c4 |
1892 | cc->cur = n - 1; |
c277df42 |
1893 | cc->lastloc = lastloc; |
4633a7c4 |
1894 | sayNO; |
a0d0e21e |
1895 | } |
1896 | /* NOT REACHED */ |
c277df42 |
1897 | case BRANCHJ: |
1898 | next = scan + ARG(scan); |
1899 | if (next == scan) |
1900 | next = NULL; |
1901 | inner = NEXTOPER(NEXTOPER(scan)); |
1902 | goto do_branch; |
1903 | case BRANCH: |
1904 | inner = NEXTOPER(scan); |
1905 | do_branch: |
1906 | { |
1907 | CHECKPOINT lastcp; |
1908 | c1 = OP(scan); |
1909 | if (OP(next) != c1) /* No choice. */ |
1910 | next = inner; /* Avoid recursion. */ |
a0d0e21e |
1911 | else { |
3280af22 |
1912 | int lastparen = *PL_reglastparen; |
c277df42 |
1913 | |
1914 | REGCP_SET; |
a0d0e21e |
1915 | do { |
3280af22 |
1916 | PL_reginput = locinput; |
c277df42 |
1917 | if (regmatch(inner)) |
4633a7c4 |
1918 | sayYES; |
c277df42 |
1919 | REGCP_UNWIND; |
3280af22 |
1920 | for (n = *PL_reglastparen; n > lastparen; n--) |
1921 | PL_regendp[n] = 0; |
1922 | *PL_reglastparen = n; |
c277df42 |
1923 | scan = next; |
a0d0e21e |
1924 | /*SUPPRESS 560*/ |
c277df42 |
1925 | if (n = (c1 == BRANCH ? NEXT_OFF(next) : ARG(next))) |
1926 | next += n; |
a0d0e21e |
1927 | else |
c277df42 |
1928 | next = NULL; |
c277df42 |
1929 | inner = NEXTOPER(scan); |
1930 | if (c1 == BRANCHJ) { |
1931 | inner = NEXTOPER(inner); |
1932 | } |
1933 | } while (scan != NULL && OP(scan) == c1); |
4633a7c4 |
1934 | sayNO; |
a0d0e21e |
1935 | /* NOTREACHED */ |
a687059c |
1936 | } |
a0d0e21e |
1937 | } |
1938 | break; |
1939 | case MINMOD: |
1940 | minmod = 1; |
1941 | break; |
c277df42 |
1942 | case CURLYM: |
1943 | { |
00db4c45 |
1944 | I32 l = 0; |
c277df42 |
1945 | CHECKPOINT lastcp; |
1946 | |
1947 | /* We suppose that the next guy does not need |
1948 | backtracking: in particular, it is of constant length, |
1949 | and has no parenths to influence future backrefs. */ |
1950 | ln = ARG1(scan); /* min to match */ |
1951 | n = ARG2(scan); /* max to match */ |
c277df42 |
1952 | paren = scan->flags; |
1953 | if (paren) { |
3280af22 |
1954 | if (paren > PL_regsize) |
1955 | PL_regsize = paren; |
1956 | if (paren > *PL_reglastparen) |
1957 | *PL_reglastparen = paren; |
c277df42 |
1958 | } |
dc45a647 |
1959 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
c277df42 |
1960 | if (paren) |
1961 | scan += NEXT_OFF(scan); /* Skip former OPEN. */ |
3280af22 |
1962 | PL_reginput = locinput; |
c277df42 |
1963 | if (minmod) { |
1964 | minmod = 0; |
1965 | if (ln && regrepeat_hard(scan, ln, &l) < ln) |
1966 | sayNO; |
5f4b28b2 |
1967 | if (ln && l == 0 && n >= ln |
c277df42 |
1968 | /* In fact, this is tricky. If paren, then the |
1969 | fact that we did/didnot match may influence |
1970 | future execution. */ |
1971 | && !(paren && ln == 0)) |
1972 | ln = n; |
3280af22 |
1973 | locinput = PL_reginput; |
c277df42 |
1974 | if (regkind[(U8)OP(next)] == EXACT) { |
1975 | c1 = UCHARAT(OPERAND(next) + 1); |
1976 | if (OP(next) == EXACTF) |
1977 | c2 = fold[c1]; |
1978 | else if (OP(next) == EXACTFL) |
1979 | c2 = fold_locale[c1]; |
1980 | else |
1981 | c2 = c1; |
a0ed51b3 |
1982 | } |
1983 | else |
c277df42 |
1984 | c1 = c2 = -1000; |
1985 | REGCP_SET; |
5f4b28b2 |
1986 | /* This may be improved if l == 0. */ |
c277df42 |
1987 | while (n >= ln || (n == REG_INFTY && ln > 0 && l)) { /* ln overflow ? */ |
1988 | /* If it could work, try it. */ |
1989 | if (c1 == -1000 || |
3280af22 |
1990 | UCHARAT(PL_reginput) == c1 || |
1991 | UCHARAT(PL_reginput) == c2) |
c277df42 |
1992 | { |
1993 | if (paren) { |
1994 | if (n) { |
dfe13c55 |
1995 | PL_regstartp[paren] = HOPc(PL_reginput, -l); |
3280af22 |
1996 | PL_regendp[paren] = PL_reginput; |
a0ed51b3 |
1997 | } |
1998 | else |
3280af22 |
1999 | PL_regendp[paren] = NULL; |
c277df42 |
2000 | } |
2001 | if (regmatch(next)) |
2002 | sayYES; |
2003 | REGCP_UNWIND; |
2004 | } |
2005 | /* Couldn't or didn't -- move forward. */ |
3280af22 |
2006 | PL_reginput = locinput; |
c277df42 |
2007 | if (regrepeat_hard(scan, 1, &l)) { |
2008 | ln++; |
3280af22 |
2009 | locinput = PL_reginput; |
c277df42 |
2010 | } |
2011 | else |
2012 | sayNO; |
2013 | } |
a0ed51b3 |
2014 | } |
2015 | else { |
c277df42 |
2016 | n = regrepeat_hard(scan, n, &l); |
2017 | if (n != 0 && l == 0 |
2018 | /* In fact, this is tricky. If paren, then the |
2019 | fact that we did/didnot match may influence |
2020 | future execution. */ |
2021 | && !(paren && ln == 0)) |
2022 | ln = n; |
3280af22 |
2023 | locinput = PL_reginput; |
c277df42 |
2024 | DEBUG_r( |
5c0ca799 |
2025 | PerlIO_printf(Perl_debug_log, |
2026 | "%*s matched %ld times, len=%ld...\n", |
3280af22 |
2027 | REPORT_CODE_OFF+PL_regindent*2, "", n, l) |
c277df42 |
2028 | ); |
2029 | if (n >= ln) { |
2030 | if (regkind[(U8)OP(next)] == EXACT) { |
2031 | c1 = UCHARAT(OPERAND(next) + 1); |
2032 | if (OP(next) == EXACTF) |
2033 | c2 = fold[c1]; |
2034 | else if (OP(next) == EXACTFL) |
2035 | c2 = fold_locale[c1]; |
2036 | else |
2037 | c2 = c1; |
a0ed51b3 |
2038 | } |
2039 | else |
c277df42 |
2040 | c1 = c2 = -1000; |
2041 | } |
2042 | REGCP_SET; |
2043 | while (n >= ln) { |
2044 | /* If it could work, try it. */ |
2045 | if (c1 == -1000 || |
3280af22 |
2046 | UCHARAT(PL_reginput) == c1 || |
2047 | UCHARAT(PL_reginput) == c2) |
a0ed51b3 |
2048 | { |
2049 | DEBUG_r( |
c3464db5 |
2050 | PerlIO_printf(Perl_debug_log, |
2051 | "%*s trying tail with n=%ld...\n", |
3280af22 |
2052 | REPORT_CODE_OFF+PL_regindent*2, "", n) |
a0ed51b3 |
2053 | ); |
2054 | if (paren) { |
2055 | if (n) { |
dfe13c55 |
2056 | PL_regstartp[paren] = HOPc(PL_reginput, -l); |
a0ed51b3 |
2057 | PL_regendp[paren] = PL_reginput; |
c277df42 |
2058 | } |
a0ed51b3 |
2059 | else |
2060 | PL_regendp[paren] = NULL; |
c277df42 |
2061 | } |
a0ed51b3 |
2062 | if (regmatch(next)) |
2063 | sayYES; |
2064 | REGCP_UNWIND; |
2065 | } |
c277df42 |
2066 | /* Couldn't or didn't -- back up. */ |
2067 | n--; |
dfe13c55 |
2068 | locinput = HOPc(locinput, -l); |
3280af22 |
2069 | PL_reginput = locinput; |
c277df42 |
2070 | } |
2071 | } |
2072 | sayNO; |
2073 | break; |
2074 | } |
2075 | case CURLYN: |
2076 | paren = scan->flags; /* Which paren to set */ |
3280af22 |
2077 | if (paren > PL_regsize) |
2078 | PL_regsize = paren; |
2079 | if (paren > *PL_reglastparen) |
2080 | *PL_reglastparen = paren; |
c277df42 |
2081 | ln = ARG1(scan); /* min to match */ |
2082 | n = ARG2(scan); /* max to match */ |
dc45a647 |
2083 | scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE); |
c277df42 |
2084 | goto repeat; |
a0d0e21e |
2085 | case CURLY: |
c277df42 |
2086 | paren = 0; |
a0d0e21e |
2087 | ln = ARG1(scan); /* min to match */ |
2088 | n = ARG2(scan); /* max to match */ |
dc45a647 |
2089 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
a0d0e21e |
2090 | goto repeat; |
2091 | case STAR: |
2092 | ln = 0; |
c277df42 |
2093 | n = REG_INFTY; |
a0d0e21e |
2094 | scan = NEXTOPER(scan); |
c277df42 |
2095 | paren = 0; |
a0d0e21e |
2096 | goto repeat; |
2097 | case PLUS: |
c277df42 |
2098 | ln = 1; |
2099 | n = REG_INFTY; |
2100 | scan = NEXTOPER(scan); |
2101 | paren = 0; |
2102 | repeat: |
a0d0e21e |
2103 | /* |
2104 | * Lookahead to avoid useless match attempts |
2105 | * when we know what character comes next. |
2106 | */ |
bbce6d69 |
2107 | if (regkind[(U8)OP(next)] == EXACT) { |
2108 | c1 = UCHARAT(OPERAND(next) + 1); |
2109 | if (OP(next) == EXACTF) |
2110 | c2 = fold[c1]; |
2111 | else if (OP(next) == EXACTFL) |
2112 | c2 = fold_locale[c1]; |
2113 | else |
2114 | c2 = c1; |
2115 | } |
a0d0e21e |
2116 | else |
bbce6d69 |
2117 | c1 = c2 = -1000; |
3280af22 |
2118 | PL_reginput = locinput; |
a0d0e21e |
2119 | if (minmod) { |
c277df42 |
2120 | CHECKPOINT lastcp; |
a0d0e21e |
2121 | minmod = 0; |
2122 | if (ln && regrepeat(scan, ln) < ln) |
4633a7c4 |
2123 | sayNO; |
a0ed51b3 |
2124 | locinput = PL_reginput; |
c277df42 |
2125 | REGCP_SET; |
2126 | while (n >= ln || (n == REG_INFTY && ln > 0)) { /* ln overflow ? */ |
a0d0e21e |
2127 | /* If it could work, try it. */ |
bbce6d69 |
2128 | if (c1 == -1000 || |
3280af22 |
2129 | UCHARAT(PL_reginput) == c1 || |
2130 | UCHARAT(PL_reginput) == c2) |
bbce6d69 |
2131 | { |
c277df42 |
2132 | if (paren) { |
2133 | if (n) { |
dfe13c55 |
2134 | PL_regstartp[paren] = HOPc(PL_reginput, -1); |
3280af22 |
2135 | PL_regendp[paren] = PL_reginput; |
a0ed51b3 |
2136 | } |
2137 | else |
3280af22 |
2138 | PL_regendp[paren] = NULL; |
c277df42 |
2139 | } |
a0d0e21e |
2140 | if (regmatch(next)) |
4633a7c4 |
2141 | sayYES; |
c277df42 |
2142 | REGCP_UNWIND; |
bbce6d69 |
2143 | } |
c277df42 |
2144 | /* Couldn't or didn't -- move forward. */ |
a0ed51b3 |
2145 | PL_reginput = locinput; |
a0d0e21e |
2146 | if (regrepeat(scan, 1)) { |
2147 | ln++; |
a0ed51b3 |
2148 | locinput = PL_reginput; |
2149 | } |
2150 | else |
4633a7c4 |
2151 | sayNO; |
a0d0e21e |
2152 | } |
2153 | } |
2154 | else { |
c277df42 |
2155 | CHECKPOINT lastcp; |
a0d0e21e |
2156 | n = regrepeat(scan, n); |
a0ed51b3 |
2157 | locinput = PL_reginput; |
a0d0e21e |
2158 | if (ln < n && regkind[(U8)OP(next)] == EOL && |
3280af22 |
2159 | (!PL_multiline || OP(next) == SEOL)) |
a0d0e21e |
2160 | ln = n; /* why back off? */ |
c277df42 |
2161 | REGCP_SET; |
2162 | if (paren) { |
2163 | while (n >= ln) { |
2164 | /* If it could work, try it. */ |
2165 | if (c1 == -1000 || |
3280af22 |
2166 | UCHARAT(PL_reginput) == c1 || |
2167 | UCHARAT(PL_reginput) == c2) |
c277df42 |
2168 | { |
2169 | if (paren && n) { |
2170 | if (n) { |
dfe13c55 |
2171 | PL_regstartp[paren] = HOPc(PL_reginput, -1); |
3280af22 |
2172 | PL_regendp[paren] = PL_reginput; |
a0ed51b3 |
2173 | } |
2174 | else |
3280af22 |
2175 | PL_regendp[paren] = NULL; |
c277df42 |
2176 | } |
2177 | if (regmatch(next)) |
2178 | sayYES; |
2179 | REGCP_UNWIND; |
2180 | } |
2181 | /* Couldn't or didn't -- back up. */ |
2182 | n--; |
dfe13c55 |
2183 | PL_reginput = locinput = HOPc(locinput, -1); |
c277df42 |
2184 | } |
a0ed51b3 |
2185 | } |
2186 | else { |
c277df42 |
2187 | while (n >= ln) { |
2188 | /* If it could work, try it. */ |
2189 | if (c1 == -1000 || |
3280af22 |
2190 | UCHARAT(PL_reginput) == c1 || |
2191 | UCHARAT(PL_reginput) == c2) |
c277df42 |
2192 | { |
2193 | if (regmatch(next)) |
2194 | sayYES; |
2195 | REGCP_UNWIND; |
2196 | } |
2197 | /* Couldn't or didn't -- back up. */ |
2198 | n--; |
dfe13c55 |
2199 | PL_reginput = locinput = HOPc(locinput, -1); |
bbce6d69 |
2200 | } |
a0d0e21e |
2201 | } |
2202 | } |
4633a7c4 |
2203 | sayNO; |
c277df42 |
2204 | break; |
a0d0e21e |
2205 | case END: |
0f5d15d6 |
2206 | if (PL_reg_call_cc) { |
2207 | re_cc_state *cur_call_cc = PL_reg_call_cc; |
2208 | CURCUR *cctmp = PL_regcc; |
2209 | regexp *re = PL_reg_re; |
2210 | CHECKPOINT cp, lastcp; |
2211 | |
2212 | cp = regcppush(0); /* Save *all* the positions. */ |
2213 | REGCP_SET; |
2214 | regcp_set_to(PL_reg_call_cc->ss); /* Restore parens of |
2215 | the caller. */ |
2216 | PL_reginput = locinput; /* Make position available to |
2217 | the callcc. */ |
2218 | cache_re(PL_reg_call_cc->re); |
2219 | PL_regcc = PL_reg_call_cc->cc; |
2220 | PL_reg_call_cc = PL_reg_call_cc->prev; |
2221 | if (regmatch(cur_call_cc->node)) { |
2222 | PL_reg_call_cc = cur_call_cc; |
2223 | regcpblow(cp); |
2224 | sayYES; |
2225 | } |
2226 | REGCP_UNWIND; |
2227 | regcppop(); |
2228 | PL_reg_call_cc = cur_call_cc; |
2229 | PL_regcc = cctmp; |
2230 | PL_reg_re = re; |
2231 | cache_re(re); |
2232 | |
2233 | DEBUG_r( |
2234 | PerlIO_printf(Perl_debug_log, |
2235 | "%*s continuation failed...\n", |
2236 | REPORT_CODE_OFF+PL_regindent*2, "") |
2237 | ); |
2238 | sayNO; |
2239 | } |
3280af22 |
2240 | if (locinput < PL_regtill) |
7e5428c5 |
2241 | sayNO; /* Cannot match: too short. */ |
2242 | /* Fall through */ |
2243 | case SUCCEED: |
3280af22 |
2244 | PL_reginput = locinput; /* put where regtry can find it */ |
4633a7c4 |
2245 | sayYES; /* Success! */ |
c277df42 |
2246 | case SUSPEND: |
2247 | n = 1; |
9fe1d20c |
2248 | PL_reginput = locinput; |
c277df42 |
2249 | goto do_ifmatch; |
a0d0e21e |
2250 | case UNLESSM: |
c277df42 |
2251 | n = 0; |
a0ed51b3 |
2252 | if (scan->flags) { |
dfe13c55 |
2253 | s = HOPMAYBEc(locinput, -scan->flags); |
a0ed51b3 |
2254 | if (!s) |
2255 | goto say_yes; |
2256 | PL_reginput = s; |
2257 | } |
2258 | else |
2259 | PL_reginput = locinput; |
c277df42 |
2260 | goto do_ifmatch; |
2261 | case IFMATCH: |
2262 | n = 1; |
a0ed51b3 |
2263 | if (scan->flags) { |
dfe13c55 |
2264 | s = HOPMAYBEc(locinput, -scan->flags); |
a0ed51b3 |
2265 | if (!s) |
2266 | goto say_no; |
2267 | PL_reginput = s; |
2268 | } |
2269 | else |
2270 | PL_reginput = locinput; |
2271 | |
c277df42 |
2272 | do_ifmatch: |
c277df42 |
2273 | inner = NEXTOPER(NEXTOPER(scan)); |
2274 | if (regmatch(inner) != n) { |
2275 | say_no: |
2276 | if (logical) { |
2277 | logical = 0; |
2278 | sw = 0; |
2279 | goto do_longjump; |
a0ed51b3 |
2280 | } |
2281 | else |
c277df42 |
2282 | sayNO; |
2283 | } |
2284 | say_yes: |
2285 | if (logical) { |
2286 | logical = 0; |
2287 | sw = 1; |
2288 | } |
fe44a5e8 |
2289 | if (OP(scan) == SUSPEND) { |
3280af22 |
2290 | locinput = PL_reginput; |
565764a8 |
2291 | nextchr = UCHARAT(locinput); |
fe44a5e8 |
2292 | } |
c277df42 |
2293 | /* FALL THROUGH. */ |
2294 | case LONGJMP: |
2295 | do_longjump: |
2296 | next = scan + ARG(scan); |
2297 | if (next == scan) |
2298 | next = NULL; |
a0d0e21e |
2299 | break; |
2300 | default: |
c030ccd9 |
2301 | PerlIO_printf(PerlIO_stderr(), "%lx %d\n", |
c277df42 |
2302 | (unsigned long)scan, OP(scan)); |
a0d0e21e |
2303 | FAIL("regexp memory corruption"); |
a687059c |
2304 | } |
a0d0e21e |
2305 | scan = next; |
2306 | } |
a687059c |
2307 | |
a0d0e21e |
2308 | /* |
2309 | * We get here only if there's trouble -- normally "case END" is |
2310 | * the terminating point. |
2311 | */ |
2312 | FAIL("corrupted regexp pointers"); |
2313 | /*NOTREACHED*/ |
4633a7c4 |
2314 | sayNO; |
2315 | |
2316 | yes: |
2317 | #ifdef DEBUGGING |
3280af22 |
2318 | PL_regindent--; |
4633a7c4 |
2319 | #endif |
2320 | return 1; |
2321 | |
2322 | no: |
2323 | #ifdef DEBUGGING |
3280af22 |
2324 | PL_regindent--; |
4633a7c4 |
2325 | #endif |
a0d0e21e |
2326 | return 0; |
a687059c |
2327 | } |
2328 | |
2329 | /* |
2330 | - regrepeat - repeatedly match something simple, report how many |
2331 | */ |
2332 | /* |
2333 | * [This routine now assumes that it will only match on things of length 1. |
2334 | * That was true before, but now we assume scan - reginput is the count, |
a0ed51b3 |
2335 | * rather than incrementing count on every character. [Er, except utf8.]] |
a687059c |
2336 | */ |
76e3520e |
2337 | STATIC I32 |
c277df42 |
2338 | regrepeat(regnode *p, I32 max) |
a687059c |
2339 | { |
5c0ca799 |
2340 | dTHR; |
a0d0e21e |
2341 | register char *scan; |
2342 | register char *opnd; |
2343 | register I32 c; |
3280af22 |
2344 | register char *loceol = PL_regeol; |
a0ed51b3 |
2345 | register I32 hardcount = 0; |
a0d0e21e |
2346 | |
3280af22 |
2347 | scan = PL_reginput; |
c277df42 |
2348 | if (max != REG_INFTY && max < loceol - scan) |
a0d0e21e |
2349 | loceol = scan + max; |
161b471a |
2350 | opnd = (char *) OPERAND(p); |
a0d0e21e |
2351 | switch (OP(p)) { |
2352 | case ANY: |
2353 | while (scan < loceol && *scan != '\n') |
2354 | scan++; |
2355 | break; |
2356 | case SANY: |
2357 | scan = loceol; |
2358 | break; |
a0ed51b3 |
2359 | case ANYUTF8: |
2360 | loceol = PL_regeol; |
2361 | while (scan < loceol && *scan != '\n') { |
2362 | scan += UTF8SKIP(scan); |
2363 | hardcount++; |
2364 | } |
2365 | break; |
2366 | case SANYUTF8: |
2367 | loceol = PL_regeol; |
2368 | while (scan < loceol) { |
2369 | scan += UTF8SKIP(scan); |
2370 | hardcount++; |
2371 | } |
2372 | break; |
bbce6d69 |
2373 | case EXACT: /* length of string is 1 */ |
2374 | c = UCHARAT(++opnd); |
2375 | while (scan < loceol && UCHARAT(scan) == c) |
2376 | scan++; |
2377 | break; |
2378 | case EXACTF: /* length of string is 1 */ |
2379 | c = UCHARAT(++opnd); |
2380 | while (scan < loceol && |
2381 | (UCHARAT(scan) == c || UCHARAT(scan) == fold[c])) |
2382 | scan++; |
2383 | break; |
2384 | case EXACTFL: /* length of string is 1 */ |
3280af22 |
2385 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
2386 | c = UCHARAT(++opnd); |
2387 | while (scan < loceol && |
2388 | (UCHARAT(scan) == c || UCHARAT(scan) == fold_locale[c])) |
a0d0e21e |
2389 | scan++; |
2390 | break; |
a0ed51b3 |
2391 | case ANYOFUTF8: |
2392 | loceol = PL_regeol; |
2393 | while (scan < loceol && REGINCLASSUTF8(p, (U8*)scan)) { |
2394 | scan += UTF8SKIP(scan); |
2395 | hardcount++; |
2396 | } |
2397 | break; |
a0d0e21e |
2398 | case ANYOF: |
ae5c130c |
2399 | while (scan < loceol && REGINCLASS(opnd, *scan)) |
a0d0e21e |
2400 | scan++; |
a0d0e21e |
2401 | break; |
2402 | case ALNUM: |
2403 | while (scan < loceol && isALNUM(*scan)) |
2404 | scan++; |
2405 | break; |
a0ed51b3 |
2406 | case ALNUMUTF8: |
2407 | loceol = PL_regeol; |
dfe13c55 |
2408 | while (scan < loceol && swash_fetch(PL_utf8_alnum, (U8*)scan)) { |
a0ed51b3 |
2409 | scan += UTF8SKIP(scan); |
2410 | hardcount++; |
2411 | } |
2412 | break; |
bbce6d69 |
2413 | case ALNUML: |
3280af22 |
2414 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
2415 | while (scan < loceol && isALNUM_LC(*scan)) |
2416 | scan++; |
2417 | break; |
a0ed51b3 |
2418 | case ALNUMLUTF8: |
2419 | PL_reg_flags |= RF_tainted; |
2420 | loceol = PL_regeol; |
dfe13c55 |
2421 | while (scan < loceol && isALNUM_LC_utf8((U8*)scan)) { |
a0ed51b3 |
2422 | scan += UTF8SKIP(scan); |
2423 | hardcount++; |
2424 | } |
2425 | break; |
2426 | break; |
a0d0e21e |
2427 | case NALNUM: |
2428 | while (scan < loceol && !isALNUM(*scan)) |
2429 | scan++; |
2430 | break; |
a0ed51b3 |
2431 | case NALNUMUTF8: |
2432 | loceol = PL_regeol; |
dfe13c55 |
2433 | while (scan < loceol && !swash_fetch(PL_utf8_alnum, (U8*)scan)) { |
a0ed51b3 |
2434 | scan += UTF8SKIP(scan); |
2435 | hardcount++; |
2436 | } |
2437 | break; |
bbce6d69 |
2438 | case NALNUML: |
3280af22 |
2439 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
2440 | while (scan < loceol && !isALNUM_LC(*scan)) |
2441 | scan++; |
2442 | break; |
a0ed51b3 |
2443 | case NALNUMLUTF8: |
2444 | PL_reg_flags |= RF_tainted; |
2445 | loceol = PL_regeol; |
dfe13c55 |
2446 | while (scan < loceol && !isALNUM_LC_utf8((U8*)scan)) { |
a0ed51b3 |
2447 | scan += UTF8SKIP(scan); |
2448 | hardcount++; |
2449 | } |
2450 | break; |
a0d0e21e |
2451 | case SPACE: |
2452 | while (scan < loceol && isSPACE(*scan)) |
2453 | scan++; |
2454 | break; |
a0ed51b3 |
2455 | case SPACEUTF8: |
2456 | loceol = PL_regeol; |
dfe13c55 |
2457 | while (scan < loceol && (*scan == ' ' || swash_fetch(PL_utf8_space,(U8*)scan))) { |
a0ed51b3 |
2458 | scan += UTF8SKIP(scan); |
2459 | hardcount++; |
2460 | } |
2461 | break; |
bbce6d69 |
2462 | case SPACEL: |
3280af22 |
2463 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
2464 | while (scan < loceol && isSPACE_LC(*scan)) |
2465 | scan++; |
2466 | break; |
a0ed51b3 |
2467 | case SPACELUTF8: |
2468 | PL_reg_flags |= RF_tainted; |
2469 | loceol = PL_regeol; |
dfe13c55 |
2470 | while (scan < loceol && (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
a0ed51b3 |
2471 | scan += UTF8SKIP(scan); |
2472 | hardcount++; |
2473 | } |
2474 | break; |
a0d0e21e |
2475 | case NSPACE: |
2476 | while (scan < loceol && !isSPACE(*scan)) |
2477 | scan++; |
2478 | break; |
a0ed51b3 |
2479 | case NSPACEUTF8: |
2480 | loceol = PL_regeol; |
dfe13c55 |
2481 | while (scan < loceol && !(*scan == ' ' || swash_fetch(PL_utf8_space,(U8*)scan))) { |
a0ed51b3 |
2482 | scan += UTF8SKIP(scan); |
2483 | hardcount++; |
2484 | } |
2485 | break; |
bbce6d69 |
2486 | case NSPACEL: |
3280af22 |
2487 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
2488 | while (scan < loceol && !isSPACE_LC(*scan)) |
2489 | scan++; |
2490 | break; |
a0ed51b3 |
2491 | case NSPACELUTF8: |
2492 | PL_reg_flags |= RF_tainted; |
2493 | loceol = PL_regeol; |
dfe13c55 |
2494 | while (scan < loceol && !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
a0ed51b3 |
2495 | scan += UTF8SKIP(scan); |
2496 | hardcount++; |
2497 | } |
2498 | break; |
a0d0e21e |
2499 | case DIGIT: |
2500 | while (scan < loceol && isDIGIT(*scan)) |
2501 | scan++; |
2502 | break; |
a0ed51b3 |
2503 | case DIGITUTF8: |
2504 | loceol = PL_regeol; |
dfe13c55 |
2505 | while (scan < loceol && swash_fetch(PL_utf8_digit,(U8*)scan)) { |
a0ed51b3 |
2506 | scan += UTF8SKIP(scan); |
2507 | hardcount++; |
2508 | } |
2509 | break; |
2510 | break; |
a0d0e21e |
2511 | case NDIGIT: |
2512 | while (scan < loceol && !isDIGIT(*scan)) |
2513 | scan++; |
2514 | break; |
a0ed51b3 |
2515 | case NDIGITUTF8: |
2516 | loceol = PL_regeol; |
dfe13c55 |
2517 | while (scan < loceol && !swash_fetch(PL_utf8_digit,(U8*)scan)) { |
a0ed51b3 |
2518 | scan += UTF8SKIP(scan); |
2519 | hardcount++; |
2520 | } |
2521 | break; |
a0d0e21e |
2522 | default: /* Called on something of 0 width. */ |
2523 | break; /* So match right here or not at all. */ |
2524 | } |
a687059c |
2525 | |
a0ed51b3 |
2526 | if (hardcount) |
2527 | c = hardcount; |
2528 | else |
2529 | c = scan - PL_reginput; |
3280af22 |
2530 | PL_reginput = scan; |
a687059c |
2531 | |
c277df42 |
2532 | DEBUG_r( |
2533 | { |
2534 | SV *prop = sv_newmortal(); |
2535 | |
2536 | regprop(prop, p); |
2537 | PerlIO_printf(Perl_debug_log, |
2538 | "%*s %s can match %ld times out of %ld...\n", |
2539 | REPORT_CODE_OFF+1, "", SvPVX(prop),c,max); |
2540 | }); |
2541 | |
a0d0e21e |
2542 | return(c); |
a687059c |
2543 | } |
2544 | |
2545 | /* |
c277df42 |
2546 | - regrepeat_hard - repeatedly match something, report total lenth and length |
2547 | * |
2548 | * The repeater is supposed to have constant length. |
2549 | */ |
2550 | |
76e3520e |
2551 | STATIC I32 |
c277df42 |
2552 | regrepeat_hard(regnode *p, I32 max, I32 *lp) |
2553 | { |
5c0ca799 |
2554 | dTHR; |
c277df42 |
2555 | register char *scan; |
2556 | register char *start; |
3280af22 |
2557 | register char *loceol = PL_regeol; |
a0ed51b3 |
2558 | I32 l = 0; |
708e3b05 |
2559 | I32 count = 0, res = 1; |
a0ed51b3 |
2560 | |
2561 | if (!max) |
2562 | return 0; |
c277df42 |
2563 | |
3280af22 |
2564 | start = PL_reginput; |
a0ed51b3 |
2565 | if (UTF) { |
708e3b05 |
2566 | while (PL_reginput < loceol && (scan = PL_reginput, res = regmatch(p))) { |
a0ed51b3 |
2567 | if (!count++) { |
2568 | l = 0; |
2569 | while (start < PL_reginput) { |
2570 | l++; |
2571 | start += UTF8SKIP(start); |
2572 | } |
2573 | *lp = l; |
2574 | if (l == 0) |
2575 | return max; |
2576 | } |
2577 | if (count == max) |
2578 | return count; |
2579 | } |
2580 | } |
2581 | else { |
708e3b05 |
2582 | while (PL_reginput < loceol && (scan = PL_reginput, res = regmatch(p))) { |
a0ed51b3 |
2583 | if (!count++) { |
2584 | *lp = l = PL_reginput - start; |
2585 | if (max != REG_INFTY && l*max < loceol - scan) |
2586 | loceol = scan + l*max; |
2587 | if (l == 0) |
2588 | return max; |
c277df42 |
2589 | } |
2590 | } |
2591 | } |
708e3b05 |
2592 | if (!res) |
3280af22 |
2593 | PL_reginput = scan; |
c277df42 |
2594 | |
a0ed51b3 |
2595 | return count; |
c277df42 |
2596 | } |
2597 | |
2598 | /* |
bbce6d69 |
2599 | - regclass - determine if a character falls into a character class |
2600 | */ |
2601 | |
76e3520e |
2602 | STATIC bool |
8ac85365 |
2603 | reginclass(register char *p, register I32 c) |
bbce6d69 |
2604 | { |
5c0ca799 |
2605 | dTHR; |
bbce6d69 |
2606 | char flags = *p; |
2607 | bool match = FALSE; |
2608 | |
2609 | c &= 0xFF; |
ae5c130c |
2610 | if (ANYOF_TEST(p, c)) |
bbce6d69 |
2611 | match = TRUE; |
2612 | else if (flags & ANYOF_FOLD) { |
2613 | I32 cf; |
2614 | if (flags & ANYOF_LOCALE) { |
3280af22 |
2615 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
2616 | cf = fold_locale[c]; |
2617 | } |
2618 | else |
2619 | cf = fold[c]; |
ae5c130c |
2620 | if (ANYOF_TEST(p, cf)) |
bbce6d69 |
2621 | match = TRUE; |
2622 | } |
2623 | |
2624 | if (!match && (flags & ANYOF_ISA)) { |
3280af22 |
2625 | PL_reg_flags |= RF_tainted; |
bbce6d69 |
2626 | |
2627 | if (((flags & ANYOF_ALNUML) && isALNUM_LC(c)) || |
2628 | ((flags & ANYOF_NALNUML) && !isALNUM_LC(c)) || |
2629 | ((flags & ANYOF_SPACEL) && isSPACE_LC(c)) || |
2630 | ((flags & ANYOF_NSPACEL) && !isSPACE_LC(c))) |
2631 | { |
2632 | match = TRUE; |
2633 | } |
2634 | } |
2635 | |
ae5c130c |
2636 | return (flags & ANYOF_INVERT) ? !match : match; |
bbce6d69 |
2637 | } |
2638 | |
a0ed51b3 |
2639 | STATIC bool |
2640 | reginclassutf8(regnode *f, U8 *p) |
c485e607 |
2641 | { |
2642 | dTHR; |
a0ed51b3 |
2643 | char flags = ARG1(f); |
2644 | bool match = FALSE; |
2645 | SV *sv = (SV*)PL_regdata->data[ARG2(f)]; |
2646 | |
2647 | if (swash_fetch(sv, p)) |
2648 | match = TRUE; |
2649 | else if (flags & ANYOF_FOLD) { |
2650 | I32 cf; |
dfe13c55 |
2651 | U8 tmpbuf[10]; |
a0ed51b3 |
2652 | if (flags & ANYOF_LOCALE) { |
2653 | PL_reg_flags |= RF_tainted; |
2654 | uv_to_utf8(tmpbuf, toLOWER_LC_utf8(p)); |
2655 | } |
2656 | else |
2657 | uv_to_utf8(tmpbuf, toLOWER_utf8(p)); |
2658 | if (swash_fetch(sv, tmpbuf)) |
2659 | match = TRUE; |
2660 | } |
2661 | |
2662 | if (!match && (flags & ANYOF_ISA)) { |
2663 | PL_reg_flags |= RF_tainted; |
2664 | |
2665 | if (((flags & ANYOF_ALNUML) && isALNUM_LC_utf8(p)) || |
2666 | ((flags & ANYOF_NALNUML) && !isALNUM_LC_utf8(p)) || |
2667 | ((flags & ANYOF_SPACEL) && isSPACE_LC_utf8(p)) || |
2668 | ((flags & ANYOF_NSPACEL) && !isSPACE_LC_utf8(p))) |
2669 | { |
2670 | match = TRUE; |
2671 | } |
2672 | } |
2673 | |
2674 | return (flags & ANYOF_INVERT) ? !match : match; |
2675 | } |
161b471a |
2676 | |
dfe13c55 |
2677 | STATIC U8 * |
2678 | reghop(U8 *s, I32 off) |
c485e607 |
2679 | { |
2680 | dTHR; |
a0ed51b3 |
2681 | if (off >= 0) { |
2682 | while (off-- && s < (U8*)PL_regeol) |
2683 | s += UTF8SKIP(s); |
2684 | } |
2685 | else { |
2686 | while (off++) { |
2687 | if (s > (U8*)PL_bostr) { |
2688 | s--; |
2689 | if (*s & 0x80) { |
2690 | while (s > (U8*)PL_bostr && (*s & 0xc0) == 0x80) |
2691 | s--; |
2692 | } /* XXX could check well-formedness here */ |
2693 | } |
2694 | } |
2695 | } |
2696 | return s; |
2697 | } |
161b471a |
2698 | |
dfe13c55 |
2699 | STATIC U8 * |
2700 | reghopmaybe(U8* s, I32 off) |
a0ed51b3 |
2701 | { |
c485e607 |
2702 | dTHR; |
a0ed51b3 |
2703 | if (off >= 0) { |
2704 | while (off-- && s < (U8*)PL_regeol) |
2705 | s += UTF8SKIP(s); |
2706 | if (off >= 0) |
2707 | return 0; |
2708 | } |
2709 | else { |
2710 | while (off++) { |
2711 | if (s > (U8*)PL_bostr) { |
2712 | s--; |
2713 | if (*s & 0x80) { |
2714 | while (s > (U8*)PL_bostr && (*s & 0xc0) == 0x80) |
2715 | s--; |
2716 | } /* XXX could check well-formedness here */ |
2717 | } |
2718 | else |
2719 | break; |
2720 | } |
2721 | if (off <= 0) |
2722 | return 0; |
2723 | } |
2724 | return s; |
2725 | } |