Commit | Line | Data |
---|---|---|
a0d0e21e LW |
1 | /* regexec.c |
2 | */ | |
3 | ||
4 | /* | |
5 | * "One Ring to rule them all, One Ring to find them..." | |
6 | */ | |
7 | ||
a687059c LW |
8 | /* NOTE: this is derived from Henry Spencer's regexp code, and should not |
9 | * confused with the original package (see point 3 below). Thanks, Henry! | |
10 | */ | |
11 | ||
12 | /* Additional note: this code is very heavily munged from Henry's version | |
13 | * in places. In some spots I've traded clarity for efficiency, so don't | |
14 | * blame Henry for some of the lack of readability. | |
15 | */ | |
16 | ||
e50aee73 AD |
17 | /* The names of the functions have been changed from regcomp and |
18 | * regexec to pregcomp and pregexec in order to avoid conflicts | |
19 | * with the POSIX routines of the same names. | |
20 | */ | |
21 | ||
b9d5759e AD |
22 | #ifdef PERL_EXT_RE_BUILD |
23 | /* need to replace pregcomp et al, so enable that */ | |
24 | # ifndef PERL_IN_XSUB_RE | |
25 | # define PERL_IN_XSUB_RE | |
26 | # endif | |
27 | /* need access to debugger hooks */ | |
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 IZ |
35 | # define Perl_regexec_flags my_regexec |
36 | # define Perl_regdump my_regdump | |
37 | # define Perl_regprop my_regprop | |
d06ea78c GS |
38 | /* *These* symbols are masked to allow static link. */ |
39 | # define Perl_pregexec my_pregexec | |
d88dccdf | 40 | # define Perl_reginitcolors my_reginitcolors |
56953603 IZ |
41 | #endif |
42 | ||
f0fcb552 | 43 | /*SUPPRESS 112*/ |
a687059c | 44 | /* |
e50aee73 | 45 | * pregcomp and pregexec -- regsub and regerror are not used in perl |
a687059c LW |
46 | * |
47 | * Copyright (c) 1986 by University of Toronto. | |
48 | * Written by Henry Spencer. Not derived from licensed software. | |
49 | * | |
50 | * Permission is granted to anyone to use this software for any | |
51 | * purpose on any computer system, and to redistribute it freely, | |
52 | * subject to the following restrictions: | |
53 | * | |
54 | * 1. The author is not responsible for the consequences of use of | |
55 | * this software, no matter how awful, even if they arise | |
56 | * from defects in it. | |
57 | * | |
58 | * 2. The origin of this software must not be misrepresented, either | |
59 | * by explicit claim or by omission. | |
60 | * | |
61 | * 3. Altered versions must be plainly marked as such, and must not | |
62 | * be misrepresented as being the original software. | |
63 | * | |
64 | **** Alterations to Henry's code are... | |
65 | **** | |
a0ed51b3 | 66 | **** Copyright (c) 1991-1998, Larry Wall |
a687059c | 67 | **** |
9ef589d8 LW |
68 | **** You may distribute under the terms of either the GNU General Public |
69 | **** License or the Artistic License, as specified in the README file. | |
a687059c LW |
70 | * |
71 | * Beware that some of this code is subtly aware of the way operator | |
72 | * precedence is structured in regular expressions. Serious changes in | |
73 | * regular-expression syntax might require a total rethink. | |
74 | */ | |
75 | #include "EXTERN.h" | |
76 | #include "perl.h" | |
0f5d15d6 | 77 | |
a687059c LW |
78 | #include "regcomp.h" |
79 | ||
c277df42 IZ |
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 LW |
83 | #define RF_utf8 8 /* String contains multibyte chars? */ |
84 | ||
85 | #define UTF (PL_reg_flags & RF_utf8) | |
ce862d02 IZ |
86 | |
87 | #define RS_init 1 /* eval environment created */ | |
88 | #define RS_set 2 /* replsv value is set */ | |
c277df42 | 89 | |
a687059c LW |
90 | #ifndef STATIC |
91 | #define STATIC static | |
92 | #endif | |
93 | ||
76e3520e | 94 | #ifndef PERL_OBJECT |
a0d0e21e LW |
95 | typedef I32 CHECKPOINT; |
96 | ||
c277df42 IZ |
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)); | |
942e002e GS |
110 | static char * regcp_set_to _((I32 ss)); |
111 | static void cache_re _((regexp *prog)); | |
9661b544 | 112 | static void restore_pos _((void *arg)); |
76e3520e | 113 | #endif |
a0ed51b3 | 114 | |
ae5c130c | 115 | #define REGINCLASS(p,c) (*(p) ? reginclass(p,c) : ANYOF_TEST(p,c)) |
a0ed51b3 LW |
116 | #define REGINCLASSUTF8(f,p) (ARG1(f) ? reginclassutf8(f,p) : swash_fetch((SV*)PL_regdata->data[ARG2(f)],p)) |
117 | ||
118 | #define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv)) | |
119 | #define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b) | |
120 | ||
dfe13c55 GS |
121 | #ifndef PERL_OBJECT |
122 | static U8 * reghop _((U8 *pos, I32 off)); | |
123 | static U8 * reghopmaybe _((U8 *pos, I32 off)); | |
124 | #endif | |
125 | #define reghop_c(pos,off) ((char*)reghop((U8*)pos, off)) | |
126 | #define reghopmaybe_c(pos,off) ((char*)reghopmaybe((U8*)pos, off)) | |
127 | #define HOP(pos,off) (UTF ? reghop((U8*)pos, off) : (U8*)(pos + off)) | |
128 | #define HOPMAYBE(pos,off) (UTF ? reghopmaybe((U8*)pos, off) : (U8*)(pos + off)) | |
129 | #define HOPc(pos,off) ((char*)HOP(pos,off)) | |
130 | #define HOPMAYBEc(pos,off) ((char*)HOPMAYBE(pos,off)) | |
a0d0e21e | 131 | |
76e3520e | 132 | STATIC CHECKPOINT |
8ac85365 | 133 | regcppush(I32 parenfloor) |
a0d0e21e | 134 | { |
11343788 | 135 | dTHR; |
3280af22 NIS |
136 | int retval = PL_savestack_ix; |
137 | int i = (PL_regsize - parenfloor) * 4; | |
a0d0e21e LW |
138 | int p; |
139 | ||
140 | SSCHECK(i + 5); | |
3280af22 NIS |
141 | for (p = PL_regsize; p > parenfloor; p--) { |
142 | SSPUSHPTR(PL_regendp[p]); | |
143 | SSPUSHPTR(PL_regstartp[p]); | |
144 | SSPUSHPTR(PL_reg_start_tmp[p]); | |
a0d0e21e LW |
145 | SSPUSHINT(p); |
146 | } | |
3280af22 NIS |
147 | SSPUSHINT(PL_regsize); |
148 | SSPUSHINT(*PL_reglastparen); | |
149 | SSPUSHPTR(PL_reginput); | |
a0d0e21e LW |
150 | SSPUSHINT(i + 3); |
151 | SSPUSHINT(SAVEt_REGCONTEXT); | |
152 | return retval; | |
153 | } | |
154 | ||
c277df42 | 155 | /* These are needed since we do not localize EVAL nodes: */ |
c3464db5 DD |
156 | # define REGCP_SET DEBUG_r(PerlIO_printf(Perl_debug_log, \ |
157 | " Setting an EVAL scope, savestack=%i\n", \ | |
3280af22 | 158 | PL_savestack_ix)); lastcp = PL_savestack_ix |
c3464db5 | 159 | |
3280af22 | 160 | # define REGCP_UNWIND DEBUG_r(lastcp != PL_savestack_ix ? \ |
c3464db5 DD |
161 | PerlIO_printf(Perl_debug_log, \ |
162 | " Clearing an EVAL scope, savestack=%i..%i\n", \ | |
3280af22 | 163 | lastcp, PL_savestack_ix) : 0); regcpblow(lastcp) |
c277df42 | 164 | |
76e3520e | 165 | STATIC char * |
8ac85365 | 166 | regcppop(void) |
a0d0e21e | 167 | { |
11343788 | 168 | dTHR; |
a0d0e21e LW |
169 | I32 i = SSPOPINT; |
170 | U32 paren = 0; | |
171 | char *input; | |
172 | char *tmps; | |
173 | assert(i == SAVEt_REGCONTEXT); | |
174 | i = SSPOPINT; | |
175 | input = (char *) SSPOPPTR; | |
3280af22 NIS |
176 | *PL_reglastparen = SSPOPINT; |
177 | PL_regsize = SSPOPINT; | |
c277df42 | 178 | for (i -= 3; i > 0; i -= 4) { |
a0d0e21e | 179 | paren = (U32)SSPOPINT; |
3280af22 NIS |
180 | PL_reg_start_tmp[paren] = (char *) SSPOPPTR; |
181 | PL_regstartp[paren] = (char *) SSPOPPTR; | |
a0d0e21e | 182 | tmps = (char*)SSPOPPTR; |
3280af22 NIS |
183 | if (paren <= *PL_reglastparen) |
184 | PL_regendp[paren] = tmps; | |
c277df42 | 185 | DEBUG_r( |
c3464db5 DD |
186 | PerlIO_printf(Perl_debug_log, |
187 | " restoring \\%d to %d(%d)..%d%s\n", | |
3280af22 NIS |
188 | paren, PL_regstartp[paren] - PL_regbol, |
189 | PL_reg_start_tmp[paren] - PL_regbol, | |
190 | PL_regendp[paren] - PL_regbol, | |
191 | (paren > *PL_reglastparen ? "(no)" : "")); | |
c277df42 | 192 | ); |
a0d0e21e | 193 | } |
c277df42 | 194 | DEBUG_r( |
3280af22 | 195 | if (*PL_reglastparen + 1 <= PL_regnpar) { |
c3464db5 DD |
196 | PerlIO_printf(Perl_debug_log, |
197 | " restoring \\%d..\\%d to undef\n", | |
3280af22 | 198 | *PL_reglastparen + 1, PL_regnpar); |
c277df42 IZ |
199 | } |
200 | ); | |
3280af22 NIS |
201 | for (paren = *PL_reglastparen + 1; paren <= PL_regnpar; paren++) { |
202 | if (paren > PL_regsize) | |
203 | PL_regstartp[paren] = Nullch; | |
204 | PL_regendp[paren] = Nullch; | |
a0d0e21e LW |
205 | } |
206 | return input; | |
207 | } | |
208 | ||
0f5d15d6 IZ |
209 | STATIC char * |
210 | regcp_set_to(I32 ss) | |
211 | { | |
46124e9e | 212 | dTHR; |
0f5d15d6 IZ |
213 | I32 tmp = PL_savestack_ix; |
214 | ||
215 | PL_savestack_ix = ss; | |
216 | regcppop(); | |
217 | PL_savestack_ix = tmp; | |
942e002e | 218 | return Nullch; |
0f5d15d6 IZ |
219 | } |
220 | ||
221 | typedef struct re_cc_state | |
222 | { | |
223 | I32 ss; | |
224 | regnode *node; | |
225 | struct re_cc_state *prev; | |
226 | CURCUR *cc; | |
227 | regexp *re; | |
228 | } re_cc_state; | |
229 | ||
c277df42 | 230 | #define regcpblow(cp) LEAVE_SCOPE(cp) |
a0d0e21e | 231 | |
a687059c | 232 | /* |
e50aee73 | 233 | * pregexec and friends |
a687059c LW |
234 | */ |
235 | ||
236 | /* | |
c277df42 | 237 | - pregexec - match a regexp against a string |
a687059c | 238 | */ |
c277df42 | 239 | I32 |
c3464db5 DD |
240 | pregexec(register regexp *prog, char *stringarg, register char *strend, |
241 | char *strbeg, I32 minend, SV *screamer, U32 nosave) | |
c277df42 IZ |
242 | /* strend: pointer to null at end of string */ |
243 | /* strbeg: real beginning of string */ | |
244 | /* minend: end of match must be >=minend after stringarg. */ | |
245 | /* nosave: For optimizations. */ | |
246 | { | |
247 | return | |
248 | regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL, | |
249 | nosave ? 0 : REXEC_COPY_STR); | |
250 | } | |
0f5d15d6 IZ |
251 | |
252 | STATIC void | |
253 | cache_re(regexp *prog) | |
254 | { | |
46124e9e | 255 | dTHR; |
0f5d15d6 IZ |
256 | PL_regprecomp = prog->precomp; /* Needed for FAIL. */ |
257 | #ifdef DEBUGGING | |
258 | PL_regprogram = prog->program; | |
259 | #endif | |
260 | PL_regnpar = prog->nparens; | |
261 | PL_regdata = prog->data; | |
262 | PL_reg_re = prog; | |
263 | } | |
22e551b9 | 264 | |
9661b544 IZ |
265 | STATIC void |
266 | restore_pos(void *arg) | |
267 | { | |
268 | if (PL_reg_eval_set) { | |
269 | PL_reg_magic->mg_len = PL_reg_oldpos; | |
270 | PL_reg_eval_set = 0; | |
5c5e4c24 | 271 | PL_curpm = PL_reg_oldcurpm; |
9661b544 IZ |
272 | } |
273 | } | |
274 | ||
275 | ||
a687059c | 276 | /* |
c277df42 | 277 | - regexec_flags - match a regexp against a string |
a687059c | 278 | */ |
79072805 | 279 | I32 |
c3464db5 | 280 | regexec_flags(register regexp *prog, char *stringarg, register char *strend, |
22e551b9 | 281 | char *strbeg, I32 minend, SV *sv, void *data, U32 flags) |
c277df42 IZ |
282 | /* strend: pointer to null at end of string */ |
283 | /* strbeg: real beginning of string */ | |
284 | /* minend: end of match must be >=minend after stringarg. */ | |
285 | /* data: May be used for some additional optimizations. */ | |
286 | /* nosave: For optimizations. */ | |
a687059c | 287 | { |
5c0ca799 | 288 | dTHR; |
a0d0e21e | 289 | register char *s; |
c277df42 | 290 | register regnode *c; |
a0d0e21e LW |
291 | register char *startpos = stringarg; |
292 | register I32 tmp; | |
c277df42 | 293 | I32 minlen; /* must match at least this many chars */ |
a0d0e21e LW |
294 | I32 dontbother = 0; /* how many characters not to try at end */ |
295 | CURCUR cc; | |
c277df42 | 296 | I32 start_shift = 0; /* Offset of the start to find |
a0ed51b3 LW |
297 | constant substr. */ /* CC */ |
298 | I32 end_shift = 0; /* Same for the end. */ /* CC */ | |
c277df42 IZ |
299 | I32 scream_pos = -1; /* Internal iterator of scream. */ |
300 | char *scream_olds; | |
3280af22 | 301 | SV* oreplsv = GvSV(PL_replgv); |
a687059c | 302 | |
a0d0e21e | 303 | cc.cur = 0; |
4633a7c4 | 304 | cc.oldcc = 0; |
3280af22 | 305 | PL_regcc = &cc; |
a0d0e21e | 306 | |
0f5d15d6 | 307 | cache_re(prog); |
a0d0e21e | 308 | #ifdef DEBUGGING |
3280af22 | 309 | PL_regnarrate = PL_debug & 512; |
a0d0e21e LW |
310 | #endif |
311 | ||
312 | /* Be paranoid... */ | |
313 | if (prog == NULL || startpos == NULL) { | |
314 | croak("NULL regexp parameter"); | |
315 | return 0; | |
316 | } | |
317 | ||
c277df42 IZ |
318 | minlen = prog->minlen; |
319 | if (strend - startpos < minlen) goto phooey; | |
320 | ||
a0d0e21e | 321 | if (startpos == strbeg) /* is ^ valid at stringarg? */ |
3280af22 | 322 | PL_regprev = '\n'; |
a0d0e21e | 323 | else { |
a0ed51b3 | 324 | PL_regprev = (U32)stringarg[-1]; |
3280af22 NIS |
325 | if (!PL_multiline && PL_regprev == '\n') |
326 | PL_regprev = '\0'; /* force ^ to NOT match */ | |
a0d0e21e | 327 | } |
bbce6d69 | 328 | |
a0d0e21e | 329 | /* Check validity of program. */ |
22c35a8c | 330 | if (UCHARAT(prog->program) != REG_MAGIC) { |
a0d0e21e LW |
331 | FAIL("corrupted regexp program"); |
332 | } | |
333 | ||
3280af22 NIS |
334 | PL_reg_flags = 0; |
335 | PL_reg_eval_set = 0; | |
a0d0e21e | 336 | |
a0ed51b3 LW |
337 | if (prog->reganch & ROPT_UTF8) |
338 | PL_reg_flags |= RF_utf8; | |
339 | ||
340 | /* Mark beginning of line for ^ and lookbehind. */ | |
341 | PL_regbol = startpos; | |
342 | PL_bostr = strbeg; | |
9661b544 | 343 | PL_reg_sv = sv; |
a0ed51b3 LW |
344 | |
345 | /* Mark end of line for $ (and such) */ | |
346 | PL_regeol = strend; | |
347 | ||
348 | /* see how far we have to get to not match where we matched before */ | |
349 | PL_regtill = startpos+minend; | |
350 | ||
0f5d15d6 IZ |
351 | /* We start without call_cc context. */ |
352 | PL_reg_call_cc = 0; | |
353 | ||
a0d0e21e LW |
354 | /* If there is a "must appear" string, look for it. */ |
355 | s = startpos; | |
c277df42 IZ |
356 | if (!(flags & REXEC_CHECKED) |
357 | && prog->check_substr != Nullsv && | |
774d564b | 358 | !(prog->reganch & ROPT_ANCH_GPOS) && |
c277df42 | 359 | (!(prog->reganch & (ROPT_ANCH_BOL | ROPT_ANCH_MBOL)) |
3280af22 | 360 | || (PL_multiline && prog->check_substr == prog->anchored_substr)) ) |
a0d0e21e | 361 | { |
a0ed51b3 LW |
362 | char *t; |
363 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ | |
c277df42 | 364 | /* Should be nonnegative! */ |
a0ed51b3 | 365 | end_shift = minlen - start_shift - CHR_SVLEN(prog->check_substr); |
22e551b9 | 366 | if (flags & REXEC_SCREAM) { |
3280af22 | 367 | if (PL_screamfirst[BmRARE(prog->check_substr)] >= 0) |
22e551b9 | 368 | s = screaminstr(sv, prog->check_substr, |
c277df42 IZ |
369 | start_shift + (stringarg - strbeg), |
370 | end_shift, &scream_pos, 0); | |
a0d0e21e LW |
371 | else |
372 | s = Nullch; | |
c277df42 | 373 | scream_olds = s; |
0a12ae7d | 374 | } |
a0d0e21e | 375 | else |
c277df42 IZ |
376 | s = fbm_instr((unsigned char*)s + start_shift, |
377 | (unsigned char*)strend - end_shift, | |
411d5715 | 378 | prog->check_substr, 0); |
a0d0e21e | 379 | if (!s) { |
c277df42 | 380 | ++BmUSEFUL(prog->check_substr); /* hooray */ |
a0d0e21e | 381 | goto phooey; /* not present */ |
a0ed51b3 LW |
382 | } |
383 | else if (s - stringarg > prog->check_offset_max && | |
384 | (UTF | |
dfe13c55 | 385 | ? ((t = reghopmaybe_c(s, -(prog->check_offset_max))) && t >= stringarg) |
a0ed51b3 LW |
386 | : (t = s - prog->check_offset_max) != 0 |
387 | ) | |
388 | ) | |
389 | { | |
c277df42 | 390 | ++BmUSEFUL(prog->check_substr); /* hooray/2 */ |
a0ed51b3 LW |
391 | s = t; |
392 | } | |
393 | else if (!(prog->reganch & ROPT_NAUGHTY) | |
c277df42 IZ |
394 | && --BmUSEFUL(prog->check_substr) < 0 |
395 | && prog->check_substr == prog->float_substr) { /* boo */ | |
396 | SvREFCNT_dec(prog->check_substr); | |
397 | prog->check_substr = Nullsv; /* disable */ | |
398 | prog->float_substr = Nullsv; /* clear */ | |
a0d0e21e | 399 | s = startpos; |
a0ed51b3 LW |
400 | } |
401 | else | |
402 | s = startpos; | |
a0d0e21e | 403 | } |
a687059c | 404 | |
c277df42 | 405 | DEBUG_r( |
d88dccdf IZ |
406 | if (!PL_colorset) |
407 | reginitcolors(); | |
c277df42 | 408 | PerlIO_printf(Perl_debug_log, |
8d300b32 GS |
409 | "%sMatching%s `%s%.60s%s%s' against `%s%.*s%s%s'\n", |
410 | PL_colors[4],PL_colors[5],PL_colors[0], | |
411 | prog->precomp, | |
412 | PL_colors[1], | |
c277df42 | 413 | (strlen(prog->precomp) > 60 ? "..." : ""), |
8d300b32 | 414 | PL_colors[0], |
c277df42 | 415 | (strend - startpos > 60 ? 60 : strend - startpos), |
8d300b32 | 416 | startpos, PL_colors[1], |
c277df42 IZ |
417 | (strend - startpos > 60 ? "..." : "")) |
418 | ); | |
419 | ||
22e551b9 IZ |
420 | if (prog->reganch & ROPT_GPOS_SEEN) { |
421 | MAGIC *mg; | |
422 | int pos = 0; | |
423 | ||
424 | if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv) | |
425 | && (mg = mg_find(sv, 'g')) && mg->mg_len >= 0) | |
426 | pos = mg->mg_len; | |
427 | PL_reg_ganch = startpos + pos; | |
428 | } | |
429 | ||
a0d0e21e | 430 | /* Simplest case: anchored match need be tried only once. */ |
774d564b | 431 | /* [unless only anchor is BOL and multiline is set] */ |
22e551b9 | 432 | if (prog->reganch & (ROPT_ANCH & ~ROPT_ANCH_GPOS)) { |
a0d0e21e LW |
433 | if (regtry(prog, startpos)) |
434 | goto got_it; | |
22e551b9 IZ |
435 | else if (PL_multiline || (prog->reganch & ROPT_IMPLICIT) |
436 | || (prog->reganch & ROPT_ANCH_MBOL)) /* XXXX SBOL? */ | |
774d564b | 437 | { |
a0d0e21e LW |
438 | if (minlen) |
439 | dontbother = minlen - 1; | |
dfe13c55 | 440 | strend = HOPc(strend, -dontbother); |
a0d0e21e LW |
441 | /* for multiline we only have to try after newlines */ |
442 | if (s > startpos) | |
443 | s--; | |
444 | while (s < strend) { | |
6f06b55f | 445 | if (*s++ == '\n') { /* don't need PL_utf8skip here */ |
a0d0e21e LW |
446 | if (s < strend && regtry(prog, s)) |
447 | goto got_it; | |
448 | } | |
35c8bce7 | 449 | } |
35c8bce7 | 450 | } |
a0d0e21e | 451 | goto phooey; |
22e551b9 IZ |
452 | } else if (prog->reganch & ROPT_ANCH_GPOS) { |
453 | if (regtry(prog, PL_reg_ganch)) | |
454 | goto got_it; | |
455 | goto phooey; | |
a0d0e21e | 456 | } |
35c8bce7 | 457 | |
a0d0e21e | 458 | /* Messy cases: unanchored match. */ |
c277df42 IZ |
459 | if (prog->anchored_substr && prog->reganch & ROPT_SKIP) { |
460 | /* we have /x+whatever/ */ | |
461 | /* it must be a one character string */ | |
462 | char ch = SvPVX(prog->anchored_substr)[0]; | |
a0ed51b3 LW |
463 | if (UTF) { |
464 | while (s < strend) { | |
465 | if (*s == ch) { | |
466 | if (regtry(prog, s)) goto got_it; | |
467 | s += UTF8SKIP(s); | |
468 | while (s < strend && *s == ch) | |
469 | s += UTF8SKIP(s); | |
470 | } | |
471 | s += UTF8SKIP(s); | |
472 | } | |
473 | } | |
474 | else { | |
475 | while (s < strend) { | |
476 | if (*s == ch) { | |
477 | if (regtry(prog, s)) goto got_it; | |
c277df42 | 478 | s++; |
a0ed51b3 LW |
479 | while (s < strend && *s == ch) |
480 | s++; | |
481 | } | |
482 | s++; | |
a0d0e21e | 483 | } |
a687059c | 484 | } |
c277df42 IZ |
485 | } |
486 | /*SUPPRESS 560*/ | |
487 | else if (prog->anchored_substr != Nullsv | |
488 | || (prog->float_substr != Nullsv | |
489 | && prog->float_max_offset < strend - s)) { | |
490 | SV *must = prog->anchored_substr | |
491 | ? prog->anchored_substr : prog->float_substr; | |
492 | I32 back_max = | |
493 | prog->anchored_substr ? prog->anchored_offset : prog->float_max_offset; | |
494 | I32 back_min = | |
495 | prog->anchored_substr ? prog->anchored_offset : prog->float_min_offset; | |
496 | I32 delta = back_max - back_min; | |
dfe13c55 | 497 | char *last = HOPc(strend, 0-(CHR_SVLEN(must) + back_min)); /* Cannot start after this */ |
a0ed51b3 LW |
498 | char *last1; /* Last position checked before */ |
499 | ||
500 | if (s > PL_bostr) | |
dfe13c55 | 501 | last1 = HOPc(s, -1); |
a0ed51b3 LW |
502 | else |
503 | last1 = s - 1; /* bogus */ | |
c277df42 IZ |
504 | |
505 | /* XXXX check_substr already used to find `s', can optimize if | |
506 | check_substr==must. */ | |
507 | scream_pos = -1; | |
508 | dontbother = end_shift; | |
dfe13c55 | 509 | strend = HOPc(strend, -dontbother); |
c277df42 | 510 | while ( (s <= last) && |
22e551b9 IZ |
511 | ((flags & REXEC_SCREAM) |
512 | ? (s = screaminstr(sv, must, HOPc(s, back_min) - strbeg, | |
c277df42 | 513 | end_shift, &scream_pos, 0)) |
a0ed51b3 | 514 | : (s = fbm_instr((unsigned char*)HOP(s, back_min), |
411d5715 | 515 | (unsigned char*)strend, must, 0))) ) { |
dfe13c55 GS |
516 | if (HOPc(s, -back_max) > last1) { |
517 | last1 = HOPc(s, -back_min); | |
518 | s = HOPc(s, -back_max); | |
a0ed51b3 LW |
519 | } |
520 | else { | |
dfe13c55 | 521 | char *t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1; |
c277df42 | 522 | |
dfe13c55 | 523 | last1 = HOPc(s, -back_min); |
c277df42 | 524 | s = t; |
a0d0e21e | 525 | } |
a0ed51b3 LW |
526 | if (UTF) { |
527 | while (s <= last1) { | |
528 | if (regtry(prog, s)) | |
529 | goto got_it; | |
530 | s += UTF8SKIP(s); | |
531 | } | |
532 | } | |
533 | else { | |
534 | while (s <= last1) { | |
535 | if (regtry(prog, s)) | |
536 | goto got_it; | |
537 | s++; | |
538 | } | |
a0d0e21e LW |
539 | } |
540 | } | |
541 | goto phooey; | |
a0ed51b3 LW |
542 | } |
543 | else if (c = prog->regstclass) { | |
a0d0e21e | 544 | I32 doevery = (prog->reganch & ROPT_SKIP) == 0; |
a0ed51b3 | 545 | char *cc; |
a687059c | 546 | |
a0d0e21e LW |
547 | if (minlen) |
548 | dontbother = minlen - 1; | |
dfe13c55 | 549 | strend = HOPc(strend, -dontbother); /* don't bother with what can't match */ |
a0d0e21e LW |
550 | tmp = 1; |
551 | /* We know what class it must start with. */ | |
552 | switch (OP(c)) { | |
a0ed51b3 LW |
553 | case ANYOFUTF8: |
554 | cc = (char *) OPERAND(c); | |
555 | while (s < strend) { | |
556 | if (REGINCLASSUTF8(c, (U8*)s)) { | |
557 | if (tmp && regtry(prog, s)) | |
558 | goto got_it; | |
559 | else | |
560 | tmp = doevery; | |
561 | } | |
562 | else | |
563 | tmp = 1; | |
564 | s += UTF8SKIP(s); | |
565 | } | |
566 | break; | |
a0d0e21e | 567 | case ANYOF: |
a0ed51b3 | 568 | cc = (char *) OPERAND(c); |
a0d0e21e | 569 | while (s < strend) { |
a0ed51b3 | 570 | if (REGINCLASS(cc, *s)) { |
a0d0e21e LW |
571 | if (tmp && regtry(prog, s)) |
572 | goto got_it; | |
573 | else | |
574 | tmp = doevery; | |
a687059c | 575 | } |
a0d0e21e LW |
576 | else |
577 | tmp = 1; | |
578 | s++; | |
579 | } | |
580 | break; | |
bbce6d69 | 581 | case BOUNDL: |
3280af22 | 582 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 583 | /* FALL THROUGH */ |
a0d0e21e | 584 | case BOUND: |
a0ed51b3 LW |
585 | if (minlen) { |
586 | dontbother++; | |
587 | strend -= 1; | |
588 | } | |
3280af22 | 589 | tmp = (s != startpos) ? UCHARAT(s - 1) : PL_regprev; |
95bac841 | 590 | tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0); |
a0d0e21e | 591 | while (s < strend) { |
95bac841 | 592 | if (tmp == !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) { |
a0d0e21e LW |
593 | tmp = !tmp; |
594 | if (regtry(prog, s)) | |
595 | goto got_it; | |
a687059c | 596 | } |
a0d0e21e LW |
597 | s++; |
598 | } | |
599 | if ((minlen || tmp) && regtry(prog,s)) | |
600 | goto got_it; | |
601 | break; | |
a0ed51b3 LW |
602 | case BOUNDLUTF8: |
603 | PL_reg_flags |= RF_tainted; | |
604 | /* FALL THROUGH */ | |
605 | case BOUNDUTF8: | |
606 | if (minlen) { | |
607 | dontbother++; | |
dfe13c55 | 608 | strend = reghop_c(strend, -1); |
a0ed51b3 | 609 | } |
dfe13c55 | 610 | tmp = (I32)(s != startpos) ? utf8_to_uv(reghop((U8*)s, -1), 0) : PL_regprev; |
a0ed51b3 LW |
611 | tmp = ((OP(c) == BOUND ? isALNUM_uni(tmp) : isALNUM_LC_uni(tmp)) != 0); |
612 | while (s < strend) { | |
dfe13c55 GS |
613 | if (tmp == !(OP(c) == BOUND ? |
614 | swash_fetch(PL_utf8_alnum, (U8*)s) : | |
615 | isALNUM_LC_utf8((U8*)s))) | |
616 | { | |
a0ed51b3 LW |
617 | tmp = !tmp; |
618 | if (regtry(prog, s)) | |
619 | goto got_it; | |
620 | } | |
621 | s += UTF8SKIP(s); | |
622 | } | |
623 | if ((minlen || tmp) && regtry(prog,s)) | |
624 | goto got_it; | |
625 | break; | |
bbce6d69 | 626 | case NBOUNDL: |
3280af22 | 627 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 628 | /* FALL THROUGH */ |
a0d0e21e | 629 | case NBOUND: |
a0ed51b3 LW |
630 | if (minlen) { |
631 | dontbother++; | |
632 | strend -= 1; | |
633 | } | |
3280af22 | 634 | tmp = (s != startpos) ? UCHARAT(s - 1) : PL_regprev; |
95bac841 | 635 | tmp = ((OP(c) == NBOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0); |
a0d0e21e | 636 | while (s < strend) { |
95bac841 | 637 | if (tmp == !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s))) |
a0d0e21e LW |
638 | tmp = !tmp; |
639 | else if (regtry(prog, s)) | |
640 | goto got_it; | |
641 | s++; | |
642 | } | |
643 | if ((minlen || !tmp) && regtry(prog,s)) | |
644 | goto got_it; | |
645 | break; | |
a0ed51b3 LW |
646 | case NBOUNDLUTF8: |
647 | PL_reg_flags |= RF_tainted; | |
648 | /* FALL THROUGH */ | |
649 | case NBOUNDUTF8: | |
650 | if (minlen) { | |
651 | dontbother++; | |
dfe13c55 | 652 | strend = reghop_c(strend, -1); |
a0ed51b3 | 653 | } |
dfe13c55 | 654 | tmp = (I32)(s != startpos) ? utf8_to_uv(reghop((U8*)s, -1), 0) : PL_regprev; |
a0ed51b3 LW |
655 | tmp = ((OP(c) == NBOUND ? isALNUM_uni(tmp) : isALNUM_LC_uni(tmp)) != 0); |
656 | while (s < strend) { | |
dfe13c55 GS |
657 | if (tmp == !(OP(c) == NBOUND ? |
658 | swash_fetch(PL_utf8_alnum, (U8*)s) : | |
659 | isALNUM_LC_utf8((U8*)s))) | |
a0ed51b3 LW |
660 | tmp = !tmp; |
661 | else if (regtry(prog, s)) | |
662 | goto got_it; | |
663 | s += UTF8SKIP(s); | |
664 | } | |
665 | if ((minlen || !tmp) && regtry(prog,s)) | |
666 | goto got_it; | |
667 | break; | |
a0d0e21e LW |
668 | case ALNUM: |
669 | while (s < strend) { | |
bbce6d69 | 670 | if (isALNUM(*s)) { |
671 | if (tmp && regtry(prog, s)) | |
672 | goto got_it; | |
673 | else | |
674 | tmp = doevery; | |
675 | } | |
676 | else | |
677 | tmp = 1; | |
678 | s++; | |
679 | } | |
680 | break; | |
a0ed51b3 LW |
681 | case ALNUMUTF8: |
682 | while (s < strend) { | |
dfe13c55 | 683 | if (swash_fetch(PL_utf8_alnum, (U8*)s)) { |
a0ed51b3 LW |
684 | if (tmp && regtry(prog, s)) |
685 | goto got_it; | |
686 | else | |
687 | tmp = doevery; | |
688 | } | |
689 | else | |
690 | tmp = 1; | |
691 | s += UTF8SKIP(s); | |
692 | } | |
693 | break; | |
bbce6d69 | 694 | case ALNUML: |
3280af22 | 695 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 696 | while (s < strend) { |
697 | if (isALNUM_LC(*s)) { | |
a0d0e21e LW |
698 | if (tmp && regtry(prog, s)) |
699 | goto got_it; | |
a687059c | 700 | else |
a0d0e21e LW |
701 | tmp = doevery; |
702 | } | |
703 | else | |
704 | tmp = 1; | |
705 | s++; | |
706 | } | |
707 | break; | |
a0ed51b3 LW |
708 | case ALNUMLUTF8: |
709 | PL_reg_flags |= RF_tainted; | |
710 | while (s < strend) { | |
dfe13c55 | 711 | if (isALNUM_LC_utf8((U8*)s)) { |
a0ed51b3 LW |
712 | if (tmp && regtry(prog, s)) |
713 | goto got_it; | |
714 | else | |
715 | tmp = doevery; | |
716 | } | |
717 | else | |
718 | tmp = 1; | |
719 | s += UTF8SKIP(s); | |
720 | } | |
721 | break; | |
a0d0e21e LW |
722 | case NALNUM: |
723 | while (s < strend) { | |
bbce6d69 | 724 | if (!isALNUM(*s)) { |
725 | if (tmp && regtry(prog, s)) | |
726 | goto got_it; | |
727 | else | |
728 | tmp = doevery; | |
729 | } | |
730 | else | |
731 | tmp = 1; | |
732 | s++; | |
733 | } | |
734 | break; | |
a0ed51b3 LW |
735 | case NALNUMUTF8: |
736 | while (s < strend) { | |
dfe13c55 | 737 | if (!swash_fetch(PL_utf8_alnum, (U8*)s)) { |
a0ed51b3 LW |
738 | if (tmp && regtry(prog, s)) |
739 | goto got_it; | |
740 | else | |
741 | tmp = doevery; | |
742 | } | |
743 | else | |
744 | tmp = 1; | |
745 | s += UTF8SKIP(s); | |
746 | } | |
747 | break; | |
bbce6d69 | 748 | case NALNUML: |
3280af22 | 749 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 750 | while (s < strend) { |
751 | if (!isALNUM_LC(*s)) { | |
a0d0e21e LW |
752 | if (tmp && regtry(prog, s)) |
753 | goto got_it; | |
a687059c | 754 | else |
a0d0e21e | 755 | tmp = doevery; |
a687059c | 756 | } |
a0d0e21e LW |
757 | else |
758 | tmp = 1; | |
759 | s++; | |
760 | } | |
761 | break; | |
a0ed51b3 LW |
762 | case NALNUMLUTF8: |
763 | PL_reg_flags |= RF_tainted; | |
764 | while (s < strend) { | |
dfe13c55 | 765 | if (!isALNUM_LC_utf8((U8*)s)) { |
a0ed51b3 LW |
766 | if (tmp && regtry(prog, s)) |
767 | goto got_it; | |
768 | else | |
769 | tmp = doevery; | |
770 | } | |
771 | else | |
772 | tmp = 1; | |
773 | s += UTF8SKIP(s); | |
774 | } | |
775 | break; | |
a0d0e21e LW |
776 | case SPACE: |
777 | while (s < strend) { | |
778 | if (isSPACE(*s)) { | |
779 | if (tmp && regtry(prog, s)) | |
780 | goto got_it; | |
781 | else | |
782 | tmp = doevery; | |
2304df62 | 783 | } |
a0d0e21e LW |
784 | else |
785 | tmp = 1; | |
786 | s++; | |
787 | } | |
788 | break; | |
a0ed51b3 LW |
789 | case SPACEUTF8: |
790 | while (s < strend) { | |
dfe13c55 | 791 | if (*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s)) { |
a0ed51b3 LW |
792 | if (tmp && regtry(prog, s)) |
793 | goto got_it; | |
794 | else | |
795 | tmp = doevery; | |
796 | } | |
797 | else | |
798 | tmp = 1; | |
799 | s += UTF8SKIP(s); | |
800 | } | |
801 | break; | |
bbce6d69 | 802 | case SPACEL: |
3280af22 | 803 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 804 | while (s < strend) { |
805 | if (isSPACE_LC(*s)) { | |
806 | if (tmp && regtry(prog, s)) | |
807 | goto got_it; | |
808 | else | |
809 | tmp = doevery; | |
810 | } | |
811 | else | |
812 | tmp = 1; | |
813 | s++; | |
814 | } | |
815 | break; | |
a0ed51b3 LW |
816 | case SPACELUTF8: |
817 | PL_reg_flags |= RF_tainted; | |
818 | while (s < strend) { | |
dfe13c55 | 819 | if (*s == ' ' || isSPACE_LC_utf8((U8*)s)) { |
a0ed51b3 LW |
820 | if (tmp && regtry(prog, s)) |
821 | goto got_it; | |
822 | else | |
823 | tmp = doevery; | |
824 | } | |
825 | else | |
826 | tmp = 1; | |
827 | s += UTF8SKIP(s); | |
828 | } | |
829 | break; | |
a0d0e21e LW |
830 | case NSPACE: |
831 | while (s < strend) { | |
832 | if (!isSPACE(*s)) { | |
833 | if (tmp && regtry(prog, s)) | |
834 | goto got_it; | |
835 | else | |
836 | tmp = doevery; | |
a687059c | 837 | } |
a0d0e21e LW |
838 | else |
839 | tmp = 1; | |
840 | s++; | |
841 | } | |
842 | break; | |
a0ed51b3 LW |
843 | case NSPACEUTF8: |
844 | while (s < strend) { | |
dfe13c55 | 845 | if (!(*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s))) { |
a0ed51b3 LW |
846 | if (tmp && regtry(prog, s)) |
847 | goto got_it; | |
848 | else | |
849 | tmp = doevery; | |
850 | } | |
851 | else | |
852 | tmp = 1; | |
853 | s += UTF8SKIP(s); | |
854 | } | |
855 | break; | |
bbce6d69 | 856 | case NSPACEL: |
3280af22 | 857 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 858 | while (s < strend) { |
859 | if (!isSPACE_LC(*s)) { | |
860 | if (tmp && regtry(prog, s)) | |
861 | goto got_it; | |
862 | else | |
863 | tmp = doevery; | |
864 | } | |
865 | else | |
866 | tmp = 1; | |
867 | s++; | |
868 | } | |
869 | break; | |
a0ed51b3 LW |
870 | case NSPACELUTF8: |
871 | PL_reg_flags |= RF_tainted; | |
872 | while (s < strend) { | |
dfe13c55 | 873 | if (!(*s == ' ' || isSPACE_LC_utf8((U8*)s))) { |
a0ed51b3 LW |
874 | if (tmp && regtry(prog, s)) |
875 | goto got_it; | |
876 | else | |
877 | tmp = doevery; | |
878 | } | |
879 | else | |
880 | tmp = 1; | |
881 | s += UTF8SKIP(s); | |
882 | } | |
883 | break; | |
a0d0e21e LW |
884 | case DIGIT: |
885 | while (s < strend) { | |
886 | if (isDIGIT(*s)) { | |
887 | if (tmp && regtry(prog, s)) | |
888 | goto got_it; | |
889 | else | |
890 | tmp = doevery; | |
2b69d0c2 | 891 | } |
a0d0e21e LW |
892 | else |
893 | tmp = 1; | |
894 | s++; | |
895 | } | |
896 | break; | |
a0ed51b3 LW |
897 | case DIGITUTF8: |
898 | while (s < strend) { | |
dfe13c55 | 899 | if (swash_fetch(PL_utf8_digit,(U8*)s)) { |
a0ed51b3 LW |
900 | if (tmp && regtry(prog, s)) |
901 | goto got_it; | |
902 | else | |
903 | tmp = doevery; | |
904 | } | |
905 | else | |
906 | tmp = 1; | |
907 | s += UTF8SKIP(s); | |
908 | } | |
909 | break; | |
a0d0e21e LW |
910 | case NDIGIT: |
911 | while (s < strend) { | |
912 | if (!isDIGIT(*s)) { | |
913 | if (tmp && regtry(prog, s)) | |
914 | goto got_it; | |
915 | else | |
916 | tmp = doevery; | |
a687059c | 917 | } |
a0d0e21e LW |
918 | else |
919 | tmp = 1; | |
920 | s++; | |
921 | } | |
922 | break; | |
a0ed51b3 LW |
923 | case NDIGITUTF8: |
924 | while (s < strend) { | |
dfe13c55 | 925 | if (!swash_fetch(PL_utf8_digit,(U8*)s)) { |
a0ed51b3 LW |
926 | if (tmp && regtry(prog, s)) |
927 | goto got_it; | |
928 | else | |
929 | tmp = doevery; | |
930 | } | |
931 | else | |
932 | tmp = 1; | |
933 | s += UTF8SKIP(s); | |
934 | } | |
935 | break; | |
a687059c | 936 | } |
a0d0e21e LW |
937 | } |
938 | else { | |
c277df42 IZ |
939 | dontbother = 0; |
940 | if (prog->float_substr != Nullsv) { /* Trim the end. */ | |
941 | char *last; | |
942 | I32 oldpos = scream_pos; | |
943 | ||
22e551b9 IZ |
944 | if (flags & REXEC_SCREAM) { |
945 | last = screaminstr(sv, prog->float_substr, s - strbeg, | |
c277df42 IZ |
946 | end_shift, &scream_pos, 1); /* last one */ |
947 | if (!last) { | |
948 | last = scream_olds; /* Only one occurence. */ | |
949 | } | |
a0ed51b3 LW |
950 | } |
951 | else { | |
c277df42 IZ |
952 | STRLEN len; |
953 | char *little = SvPV(prog->float_substr, len); | |
19b4f81a JPC |
954 | if (len) |
955 | last = rninstr(s, strend, little, little + len); | |
956 | else | |
957 | last = strend; /* matching `$' */ | |
c277df42 IZ |
958 | } |
959 | if (last == NULL) goto phooey; /* Should not happen! */ | |
19b4f81a | 960 | dontbother = strend - last + prog->float_min_offset; |
c277df42 IZ |
961 | } |
962 | if (minlen && (dontbother < minlen)) | |
a0d0e21e | 963 | dontbother = minlen - 1; |
a0ed51b3 | 964 | strend -= dontbother; /* this one's always in bytes! */ |
a0d0e21e | 965 | /* We don't know much -- general case. */ |
a0ed51b3 LW |
966 | if (UTF) { |
967 | for (;;) { | |
84df6dba | 968 | if (regtry(prog, s)) |
a0ed51b3 | 969 | goto got_it; |
a0ed51b3 LW |
970 | if (s >= strend) |
971 | break; | |
972 | s += UTF8SKIP(s); | |
973 | }; | |
974 | } | |
975 | else { | |
976 | do { | |
977 | if (regtry(prog, s)) | |
978 | goto got_it; | |
979 | } while (s++ < strend); | |
980 | } | |
a0d0e21e LW |
981 | } |
982 | ||
983 | /* Failure. */ | |
984 | goto phooey; | |
a687059c | 985 | |
a0d0e21e LW |
986 | got_it: |
987 | prog->subbeg = strbeg; | |
19b4f81a | 988 | prog->subend = PL_regeol; /* strend may have been modified */ |
3280af22 | 989 | RX_MATCH_TAINTED_set(prog, PL_reg_flags & RF_tainted); |
5f05dabc | 990 | |
991 | /* make sure $`, $&, $', and $digit will work later */ | |
c277df42 IZ |
992 | if (strbeg != prog->subbase) { /* second+ //g match. */ |
993 | if (!(flags & REXEC_COPY_STR)) { | |
137443ea | 994 | if (prog->subbase) { |
995 | Safefree(prog->subbase); | |
996 | prog->subbase = Nullch; | |
997 | } | |
998 | } | |
999 | else { | |
19b4f81a | 1000 | I32 i = PL_regeol - startpos + (stringarg - strbeg); |
137443ea | 1001 | s = savepvn(strbeg, i); |
1002 | Safefree(prog->subbase); | |
1003 | prog->subbase = s; | |
1004 | prog->subbeg = prog->subbase; | |
1005 | prog->subend = prog->subbase + i; | |
1006 | s = prog->subbase + (stringarg - strbeg); | |
1007 | for (i = 0; i <= prog->nparens; i++) { | |
1008 | if (prog->endp[i]) { | |
1009 | prog->startp[i] = s + (prog->startp[i] - startpos); | |
1010 | prog->endp[i] = s + (prog->endp[i] - startpos); | |
1011 | } | |
a0d0e21e LW |
1012 | } |
1013 | } | |
a0d0e21e | 1014 | } |
5c5e4c24 IZ |
1015 | if (PL_reg_eval_set) { |
1016 | /* Preserve the current value of $^R */ | |
1017 | if (oreplsv != GvSV(PL_replgv)) | |
1018 | sv_setsv(oreplsv, GvSV(PL_replgv));/* So that when GvSV(replgv) is | |
1019 | restored, the value remains | |
1020 | the same. */ | |
9661b544 | 1021 | restore_pos(0); |
5c5e4c24 IZ |
1022 | } |
1023 | ||
a0d0e21e LW |
1024 | return 1; |
1025 | ||
1026 | phooey: | |
9661b544 IZ |
1027 | if (PL_reg_eval_set) |
1028 | restore_pos(0); | |
a0d0e21e | 1029 | return 0; |
a687059c LW |
1030 | } |
1031 | ||
1032 | /* | |
1033 | - regtry - try match at specific point | |
1034 | */ | |
76e3520e | 1035 | STATIC I32 /* 0 failure, 1 success */ |
8ac85365 | 1036 | regtry(regexp *prog, char *startpos) |
a687059c | 1037 | { |
c277df42 | 1038 | dTHR; |
a0d0e21e LW |
1039 | register I32 i; |
1040 | register char **sp; | |
1041 | register char **ep; | |
c277df42 | 1042 | CHECKPOINT lastcp; |
a0d0e21e | 1043 | |
3280af22 | 1044 | if ((prog->reganch & ROPT_EVAL_SEEN) && !PL_reg_eval_set) { |
9661b544 IZ |
1045 | MAGIC *mg; |
1046 | ||
3280af22 | 1047 | PL_reg_eval_set = RS_init; |
ce862d02 | 1048 | DEBUG_r(DEBUG_s( |
c3464db5 | 1049 | PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %i\n", |
3280af22 | 1050 | PL_stack_sp - PL_stack_base); |
ce862d02 IZ |
1051 | )); |
1052 | SAVEINT(cxstack[cxstack_ix].blk_oldsp); | |
3280af22 | 1053 | cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base; |
ce862d02 IZ |
1054 | /* Otherwise OP_NEXTSTATE will free whatever on stack now. */ |
1055 | SAVETMPS; | |
1056 | /* Apparently this is not needed, judging by wantarray. */ | |
1057 | /* SAVEINT(cxstack[cxstack_ix].blk_gimme); | |
1058 | cxstack[cxstack_ix].blk_gimme = G_SCALAR; */ | |
9661b544 IZ |
1059 | |
1060 | if (PL_reg_sv) { | |
1061 | /* Make $_ available to executed code. */ | |
1062 | if (PL_reg_sv != GvSV(PL_defgv)) { | |
1063 | SAVESPTR(GvSV(PL_defgv)); | |
1064 | GvSV(PL_defgv) = PL_reg_sv; | |
1065 | } | |
1066 | ||
1067 | if (!(SvTYPE(PL_reg_sv) >= SVt_PVMG && SvMAGIC(PL_reg_sv) | |
1068 | && (mg = mg_find(PL_reg_sv, 'g')))) { | |
1069 | /* prepare for quick setting of pos */ | |
1070 | sv_magic(PL_reg_sv, (SV*)0, 'g', Nullch, 0); | |
1071 | mg = mg_find(PL_reg_sv, 'g'); | |
1072 | mg->mg_len = -1; | |
1073 | } | |
1074 | PL_reg_magic = mg; | |
1075 | PL_reg_oldpos = mg->mg_len; | |
1076 | SAVEDESTRUCTOR(restore_pos, 0); | |
1077 | } | |
5c5e4c24 IZ |
1078 | if (!PL_reg_curpm) |
1079 | New(22,PL_reg_curpm, 1, PMOP); | |
1080 | PL_reg_curpm->op_pmregexp = prog; | |
1081 | PL_reg_oldcurpm = PL_curpm; | |
1082 | PL_curpm = PL_reg_curpm; | |
1083 | prog->subbeg = PL_bostr; | |
1084 | prog->subend = PL_regeol; /* strend may have been modified */ | |
ce862d02 | 1085 | } |
5c5e4c24 | 1086 | prog->startp[0] = startpos; |
3280af22 NIS |
1087 | PL_reginput = startpos; |
1088 | PL_regstartp = prog->startp; | |
1089 | PL_regendp = prog->endp; | |
1090 | PL_reglastparen = &prog->lastparen; | |
a0d0e21e | 1091 | prog->lastparen = 0; |
3280af22 | 1092 | PL_regsize = 0; |
364723c2 | 1093 | DEBUG_r(PL_reg_starttry = startpos); |
3280af22 NIS |
1094 | if (PL_reg_start_tmpl <= prog->nparens) { |
1095 | PL_reg_start_tmpl = prog->nparens*3/2 + 3; | |
1096 | if(PL_reg_start_tmp) | |
1097 | Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*); | |
c277df42 | 1098 | else |
3280af22 | 1099 | New(22,PL_reg_start_tmp, PL_reg_start_tmpl, char*); |
c277df42 | 1100 | } |
a0d0e21e | 1101 | |
5c5e4c24 IZ |
1102 | /* XXXX What this code is doing here?!!! There should be no need |
1103 | to do this again and again, PL_reglastparen should take care of | |
1104 | this! */ | |
a0d0e21e LW |
1105 | sp = prog->startp; |
1106 | ep = prog->endp; | |
1107 | if (prog->nparens) { | |
5c5e4c24 IZ |
1108 | for (i = prog->nparens; i >= 1; i--) { |
1109 | *++sp = NULL; | |
1110 | *++ep = NULL; | |
a687059c | 1111 | } |
a0d0e21e | 1112 | } |
c277df42 | 1113 | REGCP_SET; |
7e5428c5 | 1114 | if (regmatch(prog->program + 1)) { |
3280af22 | 1115 | prog->endp[0] = PL_reginput; |
a0d0e21e LW |
1116 | return 1; |
1117 | } | |
c277df42 IZ |
1118 | REGCP_UNWIND; |
1119 | return 0; | |
a687059c LW |
1120 | } |
1121 | ||
1122 | /* | |
1123 | - regmatch - main matching routine | |
1124 | * | |
1125 | * Conceptually the strategy is simple: check to see whether the current | |
1126 | * node matches, call self recursively to see whether the rest matches, | |
1127 | * and then act accordingly. In practice we make some effort to avoid | |
1128 | * recursion, in particular by going through "ordinary" nodes (that don't | |
1129 | * need to know whether the rest of the match failed) by a loop instead of | |
1130 | * by recursion. | |
1131 | */ | |
1132 | /* [lwall] I've hoisted the register declarations to the outer block in order to | |
1133 | * maybe save a little bit of pushing and popping on the stack. It also takes | |
1134 | * advantage of machines that use a register save mask on subroutine entry. | |
1135 | */ | |
76e3520e | 1136 | STATIC I32 /* 0 failure, 1 success */ |
c277df42 | 1137 | regmatch(regnode *prog) |
a687059c | 1138 | { |
c277df42 IZ |
1139 | dTHR; |
1140 | register regnode *scan; /* Current node. */ | |
1141 | regnode *next; /* Next node. */ | |
1142 | regnode *inner; /* Next node in internal branch. */ | |
c3464db5 DD |
1143 | register I32 nextchr; /* renamed nextchr - nextchar colides with |
1144 | function of same name */ | |
a0d0e21e LW |
1145 | register I32 n; /* no or next */ |
1146 | register I32 ln; /* len or last */ | |
1147 | register char *s; /* operand or save */ | |
3280af22 | 1148 | register char *locinput = PL_reginput; |
c277df42 IZ |
1149 | register I32 c1, c2, paren; /* case fold search, parenth */ |
1150 | int minmod = 0, sw = 0, logical = 0; | |
4633a7c4 | 1151 | #ifdef DEBUGGING |
3280af22 | 1152 | PL_regindent++; |
4633a7c4 | 1153 | #endif |
a0d0e21e | 1154 | |
a0ed51b3 | 1155 | /* Note that nextchr is a byte even in UTF */ |
76e3520e | 1156 | nextchr = UCHARAT(locinput); |
a0d0e21e LW |
1157 | scan = prog; |
1158 | while (scan != NULL) { | |
c277df42 | 1159 | #define sayNO_L (logical ? (logical = 0, sw = 0, goto cont) : sayNO) |
a687059c | 1160 | #ifdef DEBUGGING |
c277df42 IZ |
1161 | # define sayYES goto yes |
1162 | # define sayNO goto no | |
1163 | # define saySAME(x) if (x) goto yes; else goto no | |
1164 | # define REPORT_CODE_OFF 24 | |
4633a7c4 | 1165 | #else |
c277df42 IZ |
1166 | # define sayYES return 1 |
1167 | # define sayNO return 0 | |
1168 | # define saySAME(x) return x | |
a687059c | 1169 | #endif |
c277df42 IZ |
1170 | DEBUG_r( { |
1171 | SV *prop = sv_newmortal(); | |
3280af22 | 1172 | int docolor = *PL_colors[0]; |
c277df42 | 1173 | int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */ |
3280af22 NIS |
1174 | int l = (PL_regeol - locinput > taill ? taill : PL_regeol - locinput); |
1175 | int pref_len = (locinput - PL_bostr > (5 + taill) - l | |
1176 | ? (5 + taill) - l : locinput - PL_bostr); | |
364723c2 | 1177 | int pref0_len = pref_len - (locinput - PL_reg_starttry); |
c277df42 | 1178 | |
3280af22 NIS |
1179 | if (l + pref_len < (5 + taill) && l < PL_regeol - locinput) |
1180 | l = ( PL_regeol - locinput > (5 + taill) - pref_len | |
1181 | ? (5 + taill) - pref_len : PL_regeol - locinput); | |
8d300b32 GS |
1182 | if (pref0_len < 0) |
1183 | pref0_len = 0; | |
c277df42 IZ |
1184 | regprop(prop, scan); |
1185 | PerlIO_printf(Perl_debug_log, | |
8d300b32 | 1186 | "%4i <%s%.*s%s%s%.*s%s%s%s%.*s%s>%*s|%3d:%*s%s\n", |
3280af22 | 1187 | locinput - PL_bostr, |
8d300b32 GS |
1188 | PL_colors[4], pref0_len, |
1189 | locinput - pref_len, PL_colors[5], | |
1190 | PL_colors[2], pref_len - pref0_len, | |
1191 | locinput - pref_len + pref0_len, PL_colors[3], | |
c277df42 | 1192 | (docolor ? "" : "> <"), |
3280af22 | 1193 | PL_colors[0], l, locinput, PL_colors[1], |
c277df42 IZ |
1194 | 15 - l - pref_len + 1, |
1195 | "", | |
3280af22 | 1196 | scan - PL_regprogram, PL_regindent*2, "", |
c277df42 IZ |
1197 | SvPVX(prop)); |
1198 | } ); | |
a687059c | 1199 | |
c277df42 | 1200 | next = scan + NEXT_OFF(scan); |
a0d0e21e LW |
1201 | if (next == scan) |
1202 | next = NULL; | |
a687059c | 1203 | |
a0d0e21e LW |
1204 | switch (OP(scan)) { |
1205 | case BOL: | |
3280af22 NIS |
1206 | if (locinput == PL_bostr |
1207 | ? PL_regprev == '\n' | |
1208 | : (PL_multiline && | |
1209 | (nextchr || locinput < PL_regeol) && locinput[-1] == '\n') ) | |
a0d0e21e | 1210 | { |
a0ed51b3 | 1211 | /* regtill = regbol; */ |
a0d0e21e LW |
1212 | break; |
1213 | } | |
4633a7c4 | 1214 | sayNO; |
a0d0e21e | 1215 | case MBOL: |
3280af22 NIS |
1216 | if (locinput == PL_bostr |
1217 | ? PL_regprev == '\n' | |
1218 | : ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n') ) | |
a0d0e21e LW |
1219 | { |
1220 | break; | |
1221 | } | |
4633a7c4 | 1222 | sayNO; |
a0d0e21e | 1223 | case SBOL: |
3280af22 | 1224 | if (locinput == PL_regbol && PL_regprev == '\n') |
a0d0e21e | 1225 | break; |
4633a7c4 | 1226 | sayNO; |
774d564b | 1227 | case GPOS: |
22e551b9 | 1228 | if (locinput == PL_reg_ganch) |
a0d0e21e | 1229 | break; |
4633a7c4 | 1230 | sayNO; |
a0d0e21e | 1231 | case EOL: |
3280af22 | 1232 | if (PL_multiline) |
a0d0e21e LW |
1233 | goto meol; |
1234 | else | |
1235 | goto seol; | |
1236 | case MEOL: | |
1237 | meol: | |
3280af22 | 1238 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') |
4633a7c4 | 1239 | sayNO; |
a0d0e21e LW |
1240 | break; |
1241 | case SEOL: | |
1242 | seol: | |
3280af22 | 1243 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') |
4633a7c4 | 1244 | sayNO; |
3280af22 | 1245 | if (PL_regeol - locinput > 1) |
4633a7c4 | 1246 | sayNO; |
a0d0e21e | 1247 | break; |
b85d18e9 | 1248 | case EOS: |
3280af22 | 1249 | if (PL_regeol != locinput) |
b85d18e9 IZ |
1250 | sayNO; |
1251 | break; | |
a0ed51b3 LW |
1252 | case SANYUTF8: |
1253 | if (nextchr & 0x80) { | |
6f06b55f | 1254 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
1255 | if (locinput > PL_regeol) |
1256 | sayNO; | |
1257 | nextchr = UCHARAT(locinput); | |
1258 | break; | |
1259 | } | |
1260 | if (!nextchr && locinput >= PL_regeol) | |
1261 | sayNO; | |
1262 | nextchr = UCHARAT(++locinput); | |
1263 | break; | |
a0d0e21e | 1264 | case SANY: |
3280af22 | 1265 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 | 1266 | sayNO; |
76e3520e | 1267 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 1268 | break; |
a0ed51b3 LW |
1269 | case ANYUTF8: |
1270 | if (nextchr & 0x80) { | |
6f06b55f | 1271 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
1272 | if (locinput > PL_regeol) |
1273 | sayNO; | |
1274 | nextchr = UCHARAT(locinput); | |
1275 | break; | |
1276 | } | |
1277 | if (!nextchr && locinput >= PL_regeol || nextchr == '\n') | |
1278 | sayNO; | |
1279 | nextchr = UCHARAT(++locinput); | |
1280 | break; | |
22c35a8c | 1281 | case REG_ANY: |
3280af22 | 1282 | if (!nextchr && locinput >= PL_regeol || nextchr == '\n') |
4633a7c4 | 1283 | sayNO; |
76e3520e | 1284 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 1285 | break; |
bbce6d69 | 1286 | case EXACT: |
161b471a | 1287 | s = (char *) OPERAND(scan); |
c277df42 | 1288 | ln = UCHARAT(s++); |
a0d0e21e | 1289 | /* Inline the first character, for speed. */ |
76e3520e | 1290 | if (UCHARAT(s) != nextchr) |
4633a7c4 | 1291 | sayNO; |
3280af22 | 1292 | if (PL_regeol - locinput < ln) |
4633a7c4 | 1293 | sayNO; |
36477c24 | 1294 | if (ln > 1 && memNE(s, locinput, ln)) |
4633a7c4 | 1295 | sayNO; |
a0d0e21e | 1296 | locinput += ln; |
76e3520e | 1297 | nextchr = UCHARAT(locinput); |
bbce6d69 | 1298 | break; |
1299 | case EXACTFL: | |
3280af22 | 1300 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 1301 | /* FALL THROUGH */ |
1302 | case EXACTF: | |
161b471a | 1303 | s = (char *) OPERAND(scan); |
c277df42 | 1304 | ln = UCHARAT(s++); |
a0ed51b3 LW |
1305 | |
1306 | if (UTF) { | |
1307 | char *l = locinput; | |
1308 | char *e = s + ln; | |
1309 | c1 = OP(scan) == EXACTF; | |
1310 | while (s < e) { | |
1311 | if (l >= PL_regeol) | |
1312 | sayNO; | |
dfe13c55 GS |
1313 | if (utf8_to_uv((U8*)s, 0) != (c1 ? |
1314 | toLOWER_utf8((U8*)l) : | |
1315 | toLOWER_LC_utf8((U8*)l))) | |
1316 | { | |
a0ed51b3 | 1317 | sayNO; |
dfe13c55 | 1318 | } |
a0ed51b3 LW |
1319 | s += UTF8SKIP(s); |
1320 | l += UTF8SKIP(l); | |
1321 | } | |
1322 | locinput = l; | |
1323 | nextchr = UCHARAT(locinput); | |
1324 | break; | |
1325 | } | |
1326 | ||
bbce6d69 | 1327 | /* Inline the first character, for speed. */ |
76e3520e | 1328 | if (UCHARAT(s) != nextchr && |
bbce6d69 | 1329 | UCHARAT(s) != ((OP(scan) == EXACTF) |
22c35a8c | 1330 | ? PL_fold : PL_fold_locale)[nextchr]) |
bbce6d69 | 1331 | sayNO; |
3280af22 | 1332 | if (PL_regeol - locinput < ln) |
bbce6d69 | 1333 | sayNO; |
5f05dabc | 1334 | if (ln > 1 && (OP(scan) == EXACTF |
1335 | ? ibcmp(s, locinput, ln) | |
1336 | : ibcmp_locale(s, locinput, ln))) | |
bbce6d69 | 1337 | sayNO; |
1338 | locinput += ln; | |
76e3520e | 1339 | nextchr = UCHARAT(locinput); |
a0d0e21e | 1340 | break; |
a0ed51b3 LW |
1341 | case ANYOFUTF8: |
1342 | s = (char *) OPERAND(scan); | |
1343 | if (!REGINCLASSUTF8(scan, (U8*)locinput)) | |
1344 | sayNO; | |
1345 | if (locinput >= PL_regeol) | |
1346 | sayNO; | |
6f06b55f | 1347 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
1348 | nextchr = UCHARAT(locinput); |
1349 | break; | |
a0d0e21e | 1350 | case ANYOF: |
161b471a | 1351 | s = (char *) OPERAND(scan); |
76e3520e GS |
1352 | if (nextchr < 0) |
1353 | nextchr = UCHARAT(locinput); | |
873ef191 | 1354 | if (!REGINCLASS(s, nextchr)) |
4633a7c4 | 1355 | sayNO; |
3280af22 | 1356 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 | 1357 | sayNO; |
76e3520e | 1358 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 1359 | break; |
bbce6d69 | 1360 | case ALNUML: |
3280af22 | 1361 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 1362 | /* FALL THROUGH */ |
a0d0e21e | 1363 | case ALNUM: |
76e3520e | 1364 | if (!nextchr) |
4633a7c4 | 1365 | sayNO; |
bbce6d69 | 1366 | if (!(OP(scan) == ALNUM |
76e3520e | 1367 | ? isALNUM(nextchr) : isALNUM_LC(nextchr))) |
4633a7c4 | 1368 | sayNO; |
76e3520e | 1369 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 1370 | break; |
a0ed51b3 LW |
1371 | case ALNUMLUTF8: |
1372 | PL_reg_flags |= RF_tainted; | |
1373 | /* FALL THROUGH */ | |
1374 | case ALNUMUTF8: | |
1375 | if (!nextchr) | |
1376 | sayNO; | |
1377 | if (nextchr & 0x80) { | |
1378 | if (!(OP(scan) == ALNUMUTF8 | |
dfe13c55 GS |
1379 | ? swash_fetch(PL_utf8_alnum, (U8*)locinput) |
1380 | : isALNUM_LC_utf8((U8*)locinput))) | |
1381 | { | |
a0ed51b3 | 1382 | sayNO; |
dfe13c55 | 1383 | } |
6f06b55f | 1384 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
1385 | nextchr = UCHARAT(locinput); |
1386 | break; | |
1387 | } | |
1388 | if (!(OP(scan) == ALNUMUTF8 | |
1389 | ? isALNUM(nextchr) : isALNUM_LC(nextchr))) | |
1390 | sayNO; | |
1391 | nextchr = UCHARAT(++locinput); | |
1392 | break; | |
bbce6d69 | 1393 | case NALNUML: |
3280af22 | 1394 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 1395 | /* FALL THROUGH */ |
a0d0e21e | 1396 | case NALNUM: |
3280af22 | 1397 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 | 1398 | sayNO; |
bbce6d69 | 1399 | if (OP(scan) == NALNUM |
76e3520e | 1400 | ? isALNUM(nextchr) : isALNUM_LC(nextchr)) |
4633a7c4 | 1401 | sayNO; |
76e3520e | 1402 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 1403 | break; |
a0ed51b3 LW |
1404 | case NALNUMLUTF8: |
1405 | PL_reg_flags |= RF_tainted; | |
1406 | /* FALL THROUGH */ | |
1407 | case NALNUMUTF8: | |
1408 | if (!nextchr && locinput >= PL_regeol) | |
1409 | sayNO; | |
1410 | if (nextchr & 0x80) { | |
1411 | if (OP(scan) == NALNUMUTF8 | |
dfe13c55 GS |
1412 | ? swash_fetch(PL_utf8_alnum, (U8*)locinput) |
1413 | : isALNUM_LC_utf8((U8*)locinput)) | |
1414 | { | |
a0ed51b3 | 1415 | sayNO; |
dfe13c55 | 1416 | } |
6f06b55f | 1417 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
1418 | nextchr = UCHARAT(locinput); |
1419 | break; | |
1420 | } | |
1421 | if (OP(scan) == NALNUMUTF8 | |
1422 | ? isALNUM(nextchr) : isALNUM_LC(nextchr)) | |
1423 | sayNO; | |
1424 | nextchr = UCHARAT(++locinput); | |
1425 | break; | |
bbce6d69 | 1426 | case BOUNDL: |
1427 | case NBOUNDL: | |
3280af22 | 1428 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 1429 | /* FALL THROUGH */ |
a0d0e21e | 1430 | case BOUND: |
bbce6d69 | 1431 | case NBOUND: |
1432 | /* was last char in word? */ | |
3280af22 | 1433 | ln = (locinput != PL_regbol) ? UCHARAT(locinput - 1) : PL_regprev; |
bbce6d69 | 1434 | if (OP(scan) == BOUND || OP(scan) == NBOUND) { |
1435 | ln = isALNUM(ln); | |
76e3520e | 1436 | n = isALNUM(nextchr); |
bbce6d69 | 1437 | } |
1438 | else { | |
1439 | ln = isALNUM_LC(ln); | |
76e3520e | 1440 | n = isALNUM_LC(nextchr); |
bbce6d69 | 1441 | } |
95bac841 | 1442 | if (((!ln) == (!n)) == (OP(scan) == BOUND || OP(scan) == BOUNDL)) |
4633a7c4 | 1443 | sayNO; |
a0d0e21e | 1444 | break; |
a0ed51b3 LW |
1445 | case BOUNDLUTF8: |
1446 | case NBOUNDLUTF8: | |
1447 | PL_reg_flags |= RF_tainted; | |
1448 | /* FALL THROUGH */ | |
1449 | case BOUNDUTF8: | |
1450 | case NBOUNDUTF8: | |
1451 | /* was last char in word? */ | |
dfe13c55 GS |
1452 | ln = (locinput != PL_regbol) |
1453 | ? utf8_to_uv(reghop((U8*)locinput, -1), 0) : PL_regprev; | |
a0ed51b3 LW |
1454 | if (OP(scan) == BOUNDUTF8 || OP(scan) == NBOUNDUTF8) { |
1455 | ln = isALNUM_uni(ln); | |
dfe13c55 | 1456 | n = swash_fetch(PL_utf8_alnum, (U8*)locinput); |
a0ed51b3 LW |
1457 | } |
1458 | else { | |
1459 | ln = isALNUM_LC_uni(ln); | |
dfe13c55 | 1460 | n = isALNUM_LC_utf8((U8*)locinput); |
a0ed51b3 LW |
1461 | } |
1462 | if (((!ln) == (!n)) == (OP(scan) == BOUNDUTF8 || OP(scan) == BOUNDLUTF8)) | |
1463 | sayNO; | |
1464 | break; | |
bbce6d69 | 1465 | case SPACEL: |
3280af22 | 1466 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 1467 | /* FALL THROUGH */ |
a0d0e21e | 1468 | case SPACE: |
3280af22 | 1469 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 | 1470 | sayNO; |
bbce6d69 | 1471 | if (!(OP(scan) == SPACE |
76e3520e | 1472 | ? isSPACE(nextchr) : isSPACE_LC(nextchr))) |
4633a7c4 | 1473 | sayNO; |
76e3520e | 1474 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 1475 | break; |
a0ed51b3 LW |
1476 | case SPACELUTF8: |
1477 | PL_reg_flags |= RF_tainted; | |
1478 | /* FALL THROUGH */ | |
1479 | case SPACEUTF8: | |
1480 | if (!nextchr && locinput >= PL_regeol) | |
1481 | sayNO; | |
1482 | if (nextchr & 0x80) { | |
1483 | if (!(OP(scan) == SPACEUTF8 | |
dfe13c55 GS |
1484 | ? swash_fetch(PL_utf8_space,(U8*)locinput) |
1485 | : isSPACE_LC_utf8((U8*)locinput))) | |
1486 | { | |
a0ed51b3 | 1487 | sayNO; |
dfe13c55 | 1488 | } |
6f06b55f | 1489 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
1490 | nextchr = UCHARAT(locinput); |
1491 | break; | |
1492 | } | |
1493 | if (!(OP(scan) == SPACEUTF8 | |
1494 | ? isSPACE(nextchr) : isSPACE_LC(nextchr))) | |
1495 | sayNO; | |
1496 | nextchr = UCHARAT(++locinput); | |
1497 | break; | |
bbce6d69 | 1498 | case NSPACEL: |
3280af22 | 1499 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 1500 | /* FALL THROUGH */ |
a0d0e21e | 1501 | case NSPACE: |
76e3520e | 1502 | if (!nextchr) |
4633a7c4 | 1503 | sayNO; |
bbce6d69 | 1504 | if (OP(scan) == SPACE |
76e3520e | 1505 | ? isSPACE(nextchr) : isSPACE_LC(nextchr)) |
4633a7c4 | 1506 | sayNO; |
76e3520e | 1507 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 1508 | break; |
a0ed51b3 LW |
1509 | case NSPACELUTF8: |
1510 | PL_reg_flags |= RF_tainted; | |
1511 | /* FALL THROUGH */ | |
1512 | case NSPACEUTF8: | |
1513 | if (!nextchr) | |
1514 | sayNO; | |
1515 | if (nextchr & 0x80) { | |
1516 | if (OP(scan) == NSPACEUTF8 | |
dfe13c55 GS |
1517 | ? swash_fetch(PL_utf8_space,(U8*)locinput) |
1518 | : isSPACE_LC_utf8((U8*)locinput)) | |
1519 | { | |
a0ed51b3 | 1520 | sayNO; |
dfe13c55 | 1521 | } |
6f06b55f | 1522 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
1523 | nextchr = UCHARAT(locinput); |
1524 | break; | |
1525 | } | |
1526 | if (OP(scan) == NSPACEUTF8 | |
1527 | ? isSPACE(nextchr) : isSPACE_LC(nextchr)) | |
1528 | sayNO; | |
1529 | nextchr = UCHARAT(++locinput); | |
1530 | break; | |
a0d0e21e | 1531 | case DIGIT: |
76e3520e | 1532 | if (!isDIGIT(nextchr)) |
4633a7c4 | 1533 | sayNO; |
76e3520e | 1534 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 1535 | break; |
a0ed51b3 LW |
1536 | case DIGITUTF8: |
1537 | if (nextchr & 0x80) { | |
dfe13c55 | 1538 | if (!(swash_fetch(PL_utf8_digit,(U8*)locinput))) |
a0ed51b3 | 1539 | sayNO; |
6f06b55f | 1540 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
1541 | nextchr = UCHARAT(locinput); |
1542 | break; | |
1543 | } | |
1544 | if (!isDIGIT(nextchr)) | |
1545 | sayNO; | |
1546 | nextchr = UCHARAT(++locinput); | |
1547 | break; | |
a0d0e21e | 1548 | case NDIGIT: |
3280af22 | 1549 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 | 1550 | sayNO; |
76e3520e | 1551 | if (isDIGIT(nextchr)) |
4633a7c4 | 1552 | sayNO; |
76e3520e | 1553 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 1554 | break; |
a0ed51b3 LW |
1555 | case NDIGITUTF8: |
1556 | if (!nextchr && locinput >= PL_regeol) | |
1557 | sayNO; | |
1558 | if (nextchr & 0x80) { | |
dfe13c55 | 1559 | if (swash_fetch(PL_utf8_digit,(U8*)locinput)) |
a0ed51b3 | 1560 | sayNO; |
6f06b55f | 1561 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
1562 | nextchr = UCHARAT(locinput); |
1563 | break; | |
1564 | } | |
1565 | if (isDIGIT(nextchr)) | |
1566 | sayNO; | |
1567 | nextchr = UCHARAT(++locinput); | |
1568 | break; | |
1569 | case CLUMP: | |
dfe13c55 | 1570 | if (locinput >= PL_regeol || swash_fetch(PL_utf8_mark,(U8*)locinput)) |
a0ed51b3 | 1571 | sayNO; |
6f06b55f | 1572 | locinput += PL_utf8skip[nextchr]; |
dfe13c55 | 1573 | while (locinput < PL_regeol && swash_fetch(PL_utf8_mark,(U8*)locinput)) |
a0ed51b3 LW |
1574 | locinput += UTF8SKIP(locinput); |
1575 | if (locinput > PL_regeol) | |
1576 | sayNO; | |
1577 | nextchr = UCHARAT(locinput); | |
1578 | break; | |
c8756f30 | 1579 | case REFFL: |
3280af22 | 1580 | PL_reg_flags |= RF_tainted; |
c8756f30 | 1581 | /* FALL THROUGH */ |
c277df42 | 1582 | case REF: |
c8756f30 | 1583 | case REFF: |
c277df42 | 1584 | n = ARG(scan); /* which paren pair */ |
3280af22 NIS |
1585 | s = PL_regstartp[n]; |
1586 | if (*PL_reglastparen < n || !s) | |
af3f8c16 | 1587 | sayNO; /* Do not match unless seen CLOSEn. */ |
3280af22 | 1588 | if (s == PL_regendp[n]) |
a0d0e21e | 1589 | break; |
a0ed51b3 LW |
1590 | |
1591 | if (UTF && OP(scan) != REF) { /* REF can do byte comparison */ | |
1592 | char *l = locinput; | |
1593 | char *e = PL_regendp[n]; | |
1594 | /* | |
1595 | * Note that we can't do the "other character" lookup trick as | |
1596 | * in the 8-bit case (no pun intended) because in Unicode we | |
1597 | * have to map both upper and title case to lower case. | |
1598 | */ | |
1599 | if (OP(scan) == REFF) { | |
1600 | while (s < e) { | |
1601 | if (l >= PL_regeol) | |
1602 | sayNO; | |
dfe13c55 | 1603 | if (toLOWER_utf8((U8*)s) != toLOWER_utf8((U8*)l)) |
a0ed51b3 LW |
1604 | sayNO; |
1605 | s += UTF8SKIP(s); | |
1606 | l += UTF8SKIP(l); | |
1607 | } | |
1608 | } | |
1609 | else { | |
1610 | while (s < e) { | |
1611 | if (l >= PL_regeol) | |
1612 | sayNO; | |
dfe13c55 | 1613 | if (toLOWER_LC_utf8((U8*)s) != toLOWER_LC_utf8((U8*)l)) |
a0ed51b3 LW |
1614 | sayNO; |
1615 | s += UTF8SKIP(s); | |
1616 | l += UTF8SKIP(l); | |
1617 | } | |
1618 | } | |
1619 | locinput = l; | |
1620 | nextchr = UCHARAT(locinput); | |
1621 | break; | |
1622 | } | |
1623 | ||
a0d0e21e | 1624 | /* Inline the first character, for speed. */ |
76e3520e | 1625 | if (UCHARAT(s) != nextchr && |
c8756f30 AK |
1626 | (OP(scan) == REF || |
1627 | (UCHARAT(s) != ((OP(scan) == REFF | |
22c35a8c | 1628 | ? PL_fold : PL_fold_locale)[nextchr])))) |
4633a7c4 | 1629 | sayNO; |
3280af22 NIS |
1630 | ln = PL_regendp[n] - s; |
1631 | if (locinput + ln > PL_regeol) | |
4633a7c4 | 1632 | sayNO; |
c8756f30 AK |
1633 | if (ln > 1 && (OP(scan) == REF |
1634 | ? memNE(s, locinput, ln) | |
1635 | : (OP(scan) == REFF | |
1636 | ? ibcmp(s, locinput, ln) | |
1637 | : ibcmp_locale(s, locinput, ln)))) | |
4633a7c4 | 1638 | sayNO; |
a0d0e21e | 1639 | locinput += ln; |
76e3520e | 1640 | nextchr = UCHARAT(locinput); |
a0d0e21e LW |
1641 | break; |
1642 | ||
1643 | case NOTHING: | |
c277df42 | 1644 | case TAIL: |
a0d0e21e LW |
1645 | break; |
1646 | case BACK: | |
1647 | break; | |
c277df42 IZ |
1648 | case EVAL: |
1649 | { | |
1650 | dSP; | |
533c011a | 1651 | OP_4tree *oop = PL_op; |
3280af22 NIS |
1652 | COP *ocurcop = PL_curcop; |
1653 | SV **ocurpad = PL_curpad; | |
c277df42 IZ |
1654 | SV *ret; |
1655 | ||
1656 | n = ARG(scan); | |
533c011a NIS |
1657 | PL_op = (OP_4tree*)PL_regdata->data[n]; |
1658 | DEBUG_r( PerlIO_printf(Perl_debug_log, " re_eval 0x%x\n", PL_op) ); | |
3280af22 | 1659 | PL_curpad = AvARRAY((AV*)PL_regdata->data[n + 1]); |
9661b544 | 1660 | PL_reg_magic->mg_len = locinput - PL_bostr; |
5c5e4c24 | 1661 | PL_regendp[0] = locinput; |
c277df42 | 1662 | |
76e3520e | 1663 | CALLRUNOPS(); /* Scalar context. */ |
c277df42 IZ |
1664 | SPAGAIN; |
1665 | ret = POPs; | |
1666 | PUTBACK; | |
1667 | ||
0f5d15d6 IZ |
1668 | PL_op = oop; |
1669 | PL_curpad = ocurpad; | |
1670 | PL_curcop = ocurcop; | |
c277df42 | 1671 | if (logical) { |
0f5d15d6 IZ |
1672 | if (logical == 2) { /* Postponed subexpression. */ |
1673 | regexp *re; | |
22c35a8c | 1674 | MAGIC *mg = Null(MAGIC*); |
0f5d15d6 IZ |
1675 | re_cc_state state; |
1676 | CURCUR cctmp; | |
1677 | CHECKPOINT cp, lastcp; | |
1678 | ||
1679 | if(SvROK(ret) || SvRMAGICAL(ret)) { | |
1680 | SV *sv = SvROK(ret) ? SvRV(ret) : ret; | |
1681 | ||
1682 | if(SvMAGICAL(sv)) | |
1683 | mg = mg_find(sv, 'r'); | |
1684 | } | |
1685 | if (mg) { | |
1686 | re = (regexp *)mg->mg_obj; | |
df0003d4 | 1687 | (void)ReREFCNT_inc(re); |
0f5d15d6 IZ |
1688 | } |
1689 | else { | |
1690 | STRLEN len; | |
1691 | char *t = SvPV(ret, len); | |
1692 | PMOP pm; | |
1693 | char *oprecomp = PL_regprecomp; | |
1694 | I32 osize = PL_regsize; | |
1695 | I32 onpar = PL_regnpar; | |
1696 | ||
1697 | pm.op_pmflags = 0; | |
1698 | re = CALLREGCOMP(t, t + len, &pm); | |
1699 | if (!(SvFLAGS(ret) | |
1700 | & (SVs_TEMP | SVs_PADTMP | SVf_READONLY))) | |
1701 | sv_magic(ret,(SV*)ReREFCNT_inc(re),'r',0,0); | |
1702 | PL_regprecomp = oprecomp; | |
1703 | PL_regsize = osize; | |
1704 | PL_regnpar = onpar; | |
1705 | } | |
1706 | DEBUG_r( | |
1707 | PerlIO_printf(Perl_debug_log, | |
1708 | "Entering embedded `%s%.60s%s%s'\n", | |
1709 | PL_colors[0], | |
1710 | re->precomp, | |
1711 | PL_colors[1], | |
1712 | (strlen(re->precomp) > 60 ? "..." : "")) | |
1713 | ); | |
1714 | state.node = next; | |
1715 | state.prev = PL_reg_call_cc; | |
1716 | state.cc = PL_regcc; | |
1717 | state.re = PL_reg_re; | |
1718 | ||
1719 | cctmp.cur = 0; | |
1720 | cctmp.oldcc = 0; | |
1721 | PL_regcc = &cctmp; | |
1722 | ||
1723 | cp = regcppush(0); /* Save *all* the positions. */ | |
1724 | REGCP_SET; | |
1725 | cache_re(re); | |
1726 | state.ss = PL_savestack_ix; | |
1727 | *PL_reglastparen = 0; | |
1728 | PL_reg_call_cc = &state; | |
1729 | PL_reginput = locinput; | |
1730 | if (regmatch(re->program + 1)) { | |
1731 | ReREFCNT_dec(re); | |
1732 | regcpblow(cp); | |
1733 | sayYES; | |
1734 | } | |
1735 | DEBUG_r( | |
1736 | PerlIO_printf(Perl_debug_log, | |
1737 | "%*s failed...\n", | |
1738 | REPORT_CODE_OFF+PL_regindent*2, "") | |
1739 | ); | |
1740 | ReREFCNT_dec(re); | |
1741 | REGCP_UNWIND; | |
1742 | regcppop(); | |
1743 | PL_reg_call_cc = state.prev; | |
1744 | PL_regcc = state.cc; | |
1745 | PL_reg_re = state.re; | |
d3790889 | 1746 | cache_re(PL_reg_re); |
0f5d15d6 IZ |
1747 | sayNO; |
1748 | } | |
c277df42 | 1749 | sw = SvTRUE(ret); |
0f5d15d6 | 1750 | logical = 0; |
a0ed51b3 LW |
1751 | } |
1752 | else | |
3280af22 | 1753 | sv_setsv(save_scalar(PL_replgv), ret); |
c277df42 IZ |
1754 | break; |
1755 | } | |
a0d0e21e | 1756 | case OPEN: |
c277df42 | 1757 | n = ARG(scan); /* which paren pair */ |
3280af22 NIS |
1758 | PL_reg_start_tmp[n] = locinput; |
1759 | if (n > PL_regsize) | |
1760 | PL_regsize = n; | |
a0d0e21e LW |
1761 | break; |
1762 | case CLOSE: | |
c277df42 | 1763 | n = ARG(scan); /* which paren pair */ |
3280af22 NIS |
1764 | PL_regstartp[n] = PL_reg_start_tmp[n]; |
1765 | PL_regendp[n] = locinput; | |
1766 | if (n > *PL_reglastparen) | |
1767 | *PL_reglastparen = n; | |
a0d0e21e | 1768 | break; |
c277df42 IZ |
1769 | case GROUPP: |
1770 | n = ARG(scan); /* which paren pair */ | |
3280af22 | 1771 | sw = (*PL_reglastparen >= n && PL_regendp[n] != NULL); |
c277df42 IZ |
1772 | break; |
1773 | case IFTHEN: | |
1774 | if (sw) | |
1775 | next = NEXTOPER(NEXTOPER(scan)); | |
1776 | else { | |
1777 | next = scan + ARG(scan); | |
1778 | if (OP(next) == IFTHEN) /* Fake one. */ | |
1779 | next = NEXTOPER(NEXTOPER(next)); | |
1780 | } | |
1781 | break; | |
1782 | case LOGICAL: | |
0f5d15d6 | 1783 | logical = scan->flags; |
c277df42 | 1784 | break; |
a0d0e21e LW |
1785 | case CURLYX: { |
1786 | CURCUR cc; | |
3280af22 | 1787 | CHECKPOINT cp = PL_savestack_ix; |
c277df42 IZ |
1788 | |
1789 | if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */ | |
1790 | next += ARG(next); | |
3280af22 NIS |
1791 | cc.oldcc = PL_regcc; |
1792 | PL_regcc = &cc; | |
1793 | cc.parenfloor = *PL_reglastparen; | |
a0d0e21e LW |
1794 | cc.cur = -1; |
1795 | cc.min = ARG1(scan); | |
1796 | cc.max = ARG2(scan); | |
c277df42 | 1797 | cc.scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS; |
a0d0e21e LW |
1798 | cc.next = next; |
1799 | cc.minmod = minmod; | |
1800 | cc.lastloc = 0; | |
3280af22 | 1801 | PL_reginput = locinput; |
a0d0e21e LW |
1802 | n = regmatch(PREVOPER(next)); /* start on the WHILEM */ |
1803 | regcpblow(cp); | |
3280af22 | 1804 | PL_regcc = cc.oldcc; |
4633a7c4 | 1805 | saySAME(n); |
a0d0e21e LW |
1806 | } |
1807 | /* NOT REACHED */ | |
1808 | case WHILEM: { | |
1809 | /* | |
1810 | * This is really hard to understand, because after we match | |
1811 | * what we're trying to match, we must make sure the rest of | |
1812 | * the RE is going to match for sure, and to do that we have | |
1813 | * to go back UP the parse tree by recursing ever deeper. And | |
1814 | * if it fails, we have to reset our parent's current state | |
1815 | * that we can try again after backing off. | |
1816 | */ | |
1817 | ||
c277df42 | 1818 | CHECKPOINT cp, lastcp; |
3280af22 | 1819 | CURCUR* cc = PL_regcc; |
c277df42 IZ |
1820 | char *lastloc = cc->lastloc; /* Detection of 0-len. */ |
1821 | ||
4633a7c4 | 1822 | n = cc->cur + 1; /* how many we know we matched */ |
3280af22 | 1823 | PL_reginput = locinput; |
a0d0e21e | 1824 | |
c277df42 IZ |
1825 | DEBUG_r( |
1826 | PerlIO_printf(Perl_debug_log, | |
1827 | "%*s %ld out of %ld..%ld cc=%lx\n", | |
3280af22 | 1828 | REPORT_CODE_OFF+PL_regindent*2, "", |
c277df42 IZ |
1829 | (long)n, (long)cc->min, |
1830 | (long)cc->max, (long)cc) | |
1831 | ); | |
4633a7c4 | 1832 | |
a0d0e21e LW |
1833 | /* If degenerate scan matches "", assume scan done. */ |
1834 | ||
579cf2c3 | 1835 | if (locinput == cc->lastloc && n >= cc->min) { |
3280af22 NIS |
1836 | PL_regcc = cc->oldcc; |
1837 | ln = PL_regcc->cur; | |
c277df42 | 1838 | DEBUG_r( |
c3464db5 DD |
1839 | PerlIO_printf(Perl_debug_log, |
1840 | "%*s empty match detected, try continuation...\n", | |
3280af22 | 1841 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 | 1842 | ); |
a0d0e21e | 1843 | if (regmatch(cc->next)) |
4633a7c4 | 1844 | sayYES; |
c277df42 | 1845 | DEBUG_r( |
c3464db5 DD |
1846 | PerlIO_printf(Perl_debug_log, |
1847 | "%*s failed...\n", | |
3280af22 | 1848 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 | 1849 | ); |
3280af22 NIS |
1850 | PL_regcc->cur = ln; |
1851 | PL_regcc = cc; | |
4633a7c4 | 1852 | sayNO; |
a0d0e21e LW |
1853 | } |
1854 | ||
1855 | /* First just match a string of min scans. */ | |
1856 | ||
1857 | if (n < cc->min) { | |
1858 | cc->cur = n; | |
1859 | cc->lastloc = locinput; | |
4633a7c4 LW |
1860 | if (regmatch(cc->scan)) |
1861 | sayYES; | |
1862 | cc->cur = n - 1; | |
c277df42 IZ |
1863 | cc->lastloc = lastloc; |
1864 | DEBUG_r( | |
c3464db5 DD |
1865 | PerlIO_printf(Perl_debug_log, |
1866 | "%*s failed...\n", | |
3280af22 | 1867 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 | 1868 | ); |
4633a7c4 | 1869 | sayNO; |
a0d0e21e LW |
1870 | } |
1871 | ||
1872 | /* Prefer next over scan for minimal matching. */ | |
1873 | ||
1874 | if (cc->minmod) { | |
3280af22 NIS |
1875 | PL_regcc = cc->oldcc; |
1876 | ln = PL_regcc->cur; | |
5f05dabc | 1877 | cp = regcppush(cc->parenfloor); |
c277df42 | 1878 | REGCP_SET; |
5f05dabc | 1879 | if (regmatch(cc->next)) { |
c277df42 | 1880 | regcpblow(cp); |
4633a7c4 | 1881 | sayYES; /* All done. */ |
5f05dabc | 1882 | } |
c277df42 | 1883 | REGCP_UNWIND; |
5f05dabc | 1884 | regcppop(); |
3280af22 NIS |
1885 | PL_regcc->cur = ln; |
1886 | PL_regcc = cc; | |
a0d0e21e | 1887 | |
c277df42 | 1888 | if (n >= cc->max) { /* Maximum greed exceeded? */ |
599cee73 | 1889 | if (ckWARN(WARN_UNSAFE) && n >= REG_INFTY |
3280af22 NIS |
1890 | && !(PL_reg_flags & RF_warned)) { |
1891 | PL_reg_flags |= RF_warned; | |
599cee73 | 1892 | warner(WARN_UNSAFE, "%s limit (%d) exceeded", |
2f3ca594 GS |
1893 | "Complex regular subexpression recursion", |
1894 | REG_INFTY - 1); | |
c277df42 | 1895 | } |
4633a7c4 | 1896 | sayNO; |
c277df42 | 1897 | } |
a687059c | 1898 | |
c277df42 | 1899 | DEBUG_r( |
c3464db5 DD |
1900 | PerlIO_printf(Perl_debug_log, |
1901 | "%*s trying longer...\n", | |
3280af22 | 1902 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 | 1903 | ); |
a0d0e21e | 1904 | /* Try scanning more and see if it helps. */ |
3280af22 | 1905 | PL_reginput = locinput; |
a0d0e21e LW |
1906 | cc->cur = n; |
1907 | cc->lastloc = locinput; | |
5f05dabc | 1908 | cp = regcppush(cc->parenfloor); |
c277df42 | 1909 | REGCP_SET; |
5f05dabc | 1910 | if (regmatch(cc->scan)) { |
c277df42 | 1911 | regcpblow(cp); |
4633a7c4 | 1912 | sayYES; |
5f05dabc | 1913 | } |
c277df42 | 1914 | DEBUG_r( |
c3464db5 DD |
1915 | PerlIO_printf(Perl_debug_log, |
1916 | "%*s failed...\n", | |
3280af22 | 1917 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 IZ |
1918 | ); |
1919 | REGCP_UNWIND; | |
5f05dabc | 1920 | regcppop(); |
4633a7c4 | 1921 | cc->cur = n - 1; |
c277df42 | 1922 | cc->lastloc = lastloc; |
4633a7c4 | 1923 | sayNO; |
a0d0e21e LW |
1924 | } |
1925 | ||
1926 | /* Prefer scan over next for maximal matching. */ | |
1927 | ||
1928 | if (n < cc->max) { /* More greed allowed? */ | |
5f05dabc | 1929 | cp = regcppush(cc->parenfloor); |
a0d0e21e LW |
1930 | cc->cur = n; |
1931 | cc->lastloc = locinput; | |
c277df42 | 1932 | REGCP_SET; |
5f05dabc | 1933 | if (regmatch(cc->scan)) { |
c277df42 | 1934 | regcpblow(cp); |
4633a7c4 | 1935 | sayYES; |
5f05dabc | 1936 | } |
c277df42 | 1937 | REGCP_UNWIND; |
a0d0e21e | 1938 | regcppop(); /* Restore some previous $<digit>s? */ |
3280af22 | 1939 | PL_reginput = locinput; |
c277df42 | 1940 | DEBUG_r( |
c3464db5 DD |
1941 | PerlIO_printf(Perl_debug_log, |
1942 | "%*s failed, try continuation...\n", | |
3280af22 | 1943 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 IZ |
1944 | ); |
1945 | } | |
599cee73 PM |
1946 | if (ckWARN(WARN_UNSAFE) && n >= REG_INFTY |
1947 | && !(PL_reg_flags & RF_warned)) { | |
3280af22 | 1948 | PL_reg_flags |= RF_warned; |
599cee73 | 1949 | warner(WARN_UNSAFE, "%s limit (%d) exceeded", |
cb5d145d GS |
1950 | "Complex regular subexpression recursion", |
1951 | REG_INFTY - 1); | |
a0d0e21e LW |
1952 | } |
1953 | ||
1954 | /* Failed deeper matches of scan, so see if this one works. */ | |
3280af22 NIS |
1955 | PL_regcc = cc->oldcc; |
1956 | ln = PL_regcc->cur; | |
a0d0e21e | 1957 | if (regmatch(cc->next)) |
4633a7c4 | 1958 | sayYES; |
c277df42 | 1959 | DEBUG_r( |
c3464db5 | 1960 | PerlIO_printf(Perl_debug_log, "%*s failed...\n", |
3280af22 | 1961 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 | 1962 | ); |
3280af22 NIS |
1963 | PL_regcc->cur = ln; |
1964 | PL_regcc = cc; | |
4633a7c4 | 1965 | cc->cur = n - 1; |
c277df42 | 1966 | cc->lastloc = lastloc; |
4633a7c4 | 1967 | sayNO; |
a0d0e21e LW |
1968 | } |
1969 | /* NOT REACHED */ | |
c277df42 IZ |
1970 | case BRANCHJ: |
1971 | next = scan + ARG(scan); | |
1972 | if (next == scan) | |
1973 | next = NULL; | |
1974 | inner = NEXTOPER(NEXTOPER(scan)); | |
1975 | goto do_branch; | |
1976 | case BRANCH: | |
1977 | inner = NEXTOPER(scan); | |
1978 | do_branch: | |
1979 | { | |
1980 | CHECKPOINT lastcp; | |
1981 | c1 = OP(scan); | |
1982 | if (OP(next) != c1) /* No choice. */ | |
1983 | next = inner; /* Avoid recursion. */ | |
a0d0e21e | 1984 | else { |
3280af22 | 1985 | int lastparen = *PL_reglastparen; |
c277df42 IZ |
1986 | |
1987 | REGCP_SET; | |
a0d0e21e | 1988 | do { |
3280af22 | 1989 | PL_reginput = locinput; |
c277df42 | 1990 | if (regmatch(inner)) |
4633a7c4 | 1991 | sayYES; |
c277df42 | 1992 | REGCP_UNWIND; |
3280af22 NIS |
1993 | for (n = *PL_reglastparen; n > lastparen; n--) |
1994 | PL_regendp[n] = 0; | |
1995 | *PL_reglastparen = n; | |
c277df42 | 1996 | scan = next; |
a0d0e21e | 1997 | /*SUPPRESS 560*/ |
c277df42 IZ |
1998 | if (n = (c1 == BRANCH ? NEXT_OFF(next) : ARG(next))) |
1999 | next += n; | |
a0d0e21e | 2000 | else |
c277df42 | 2001 | next = NULL; |
c277df42 IZ |
2002 | inner = NEXTOPER(scan); |
2003 | if (c1 == BRANCHJ) { | |
2004 | inner = NEXTOPER(inner); | |
2005 | } | |
2006 | } while (scan != NULL && OP(scan) == c1); | |
4633a7c4 | 2007 | sayNO; |
a0d0e21e | 2008 | /* NOTREACHED */ |
a687059c | 2009 | } |
a0d0e21e LW |
2010 | } |
2011 | break; | |
2012 | case MINMOD: | |
2013 | minmod = 1; | |
2014 | break; | |
c277df42 IZ |
2015 | case CURLYM: |
2016 | { | |
00db4c45 | 2017 | I32 l = 0; |
c277df42 IZ |
2018 | CHECKPOINT lastcp; |
2019 | ||
2020 | /* We suppose that the next guy does not need | |
2021 | backtracking: in particular, it is of constant length, | |
2022 | and has no parenths to influence future backrefs. */ | |
2023 | ln = ARG1(scan); /* min to match */ | |
2024 | n = ARG2(scan); /* max to match */ | |
c277df42 IZ |
2025 | paren = scan->flags; |
2026 | if (paren) { | |
3280af22 NIS |
2027 | if (paren > PL_regsize) |
2028 | PL_regsize = paren; | |
2029 | if (paren > *PL_reglastparen) | |
2030 | *PL_reglastparen = paren; | |
c277df42 | 2031 | } |
dc45a647 | 2032 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
c277df42 IZ |
2033 | if (paren) |
2034 | scan += NEXT_OFF(scan); /* Skip former OPEN. */ | |
3280af22 | 2035 | PL_reginput = locinput; |
c277df42 IZ |
2036 | if (minmod) { |
2037 | minmod = 0; | |
2038 | if (ln && regrepeat_hard(scan, ln, &l) < ln) | |
2039 | sayNO; | |
5f4b28b2 | 2040 | if (ln && l == 0 && n >= ln |
c277df42 IZ |
2041 | /* In fact, this is tricky. If paren, then the |
2042 | fact that we did/didnot match may influence | |
2043 | future execution. */ | |
2044 | && !(paren && ln == 0)) | |
2045 | ln = n; | |
3280af22 | 2046 | locinput = PL_reginput; |
22c35a8c | 2047 | if (PL_regkind[(U8)OP(next)] == EXACT) { |
c277df42 IZ |
2048 | c1 = UCHARAT(OPERAND(next) + 1); |
2049 | if (OP(next) == EXACTF) | |
22c35a8c | 2050 | c2 = PL_fold[c1]; |
c277df42 | 2051 | else if (OP(next) == EXACTFL) |
22c35a8c | 2052 | c2 = PL_fold_locale[c1]; |
c277df42 IZ |
2053 | else |
2054 | c2 = c1; | |
a0ed51b3 LW |
2055 | } |
2056 | else | |
c277df42 IZ |
2057 | c1 = c2 = -1000; |
2058 | REGCP_SET; | |
5f4b28b2 | 2059 | /* This may be improved if l == 0. */ |
c277df42 IZ |
2060 | while (n >= ln || (n == REG_INFTY && ln > 0 && l)) { /* ln overflow ? */ |
2061 | /* If it could work, try it. */ | |
2062 | if (c1 == -1000 || | |
3280af22 NIS |
2063 | UCHARAT(PL_reginput) == c1 || |
2064 | UCHARAT(PL_reginput) == c2) | |
c277df42 IZ |
2065 | { |
2066 | if (paren) { | |
2067 | if (n) { | |
dfe13c55 | 2068 | PL_regstartp[paren] = HOPc(PL_reginput, -l); |
3280af22 | 2069 | PL_regendp[paren] = PL_reginput; |
a0ed51b3 LW |
2070 | } |
2071 | else | |
3280af22 | 2072 | PL_regendp[paren] = NULL; |
c277df42 IZ |
2073 | } |
2074 | if (regmatch(next)) | |
2075 | sayYES; | |
2076 | REGCP_UNWIND; | |
2077 | } | |
2078 | /* Couldn't or didn't -- move forward. */ | |
3280af22 | 2079 | PL_reginput = locinput; |
c277df42 IZ |
2080 | if (regrepeat_hard(scan, 1, &l)) { |
2081 | ln++; | |
3280af22 | 2082 | locinput = PL_reginput; |
c277df42 IZ |
2083 | } |
2084 | else | |
2085 | sayNO; | |
2086 | } | |
a0ed51b3 LW |
2087 | } |
2088 | else { | |
c277df42 IZ |
2089 | n = regrepeat_hard(scan, n, &l); |
2090 | if (n != 0 && l == 0 | |
2091 | /* In fact, this is tricky. If paren, then the | |
2092 | fact that we did/didnot match may influence | |
2093 | future execution. */ | |
2094 | && !(paren && ln == 0)) | |
2095 | ln = n; | |
3280af22 | 2096 | locinput = PL_reginput; |
c277df42 | 2097 | DEBUG_r( |
5c0ca799 GS |
2098 | PerlIO_printf(Perl_debug_log, |
2099 | "%*s matched %ld times, len=%ld...\n", | |
3280af22 | 2100 | REPORT_CODE_OFF+PL_regindent*2, "", n, l) |
c277df42 IZ |
2101 | ); |
2102 | if (n >= ln) { | |
22c35a8c | 2103 | if (PL_regkind[(U8)OP(next)] == EXACT) { |
c277df42 IZ |
2104 | c1 = UCHARAT(OPERAND(next) + 1); |
2105 | if (OP(next) == EXACTF) | |
22c35a8c | 2106 | c2 = PL_fold[c1]; |
c277df42 | 2107 | else if (OP(next) == EXACTFL) |
22c35a8c | 2108 | c2 = PL_fold_locale[c1]; |
c277df42 IZ |
2109 | else |
2110 | c2 = c1; | |
a0ed51b3 LW |
2111 | } |
2112 | else | |
c277df42 IZ |
2113 | c1 = c2 = -1000; |
2114 | } | |
2115 | REGCP_SET; | |
2116 | while (n >= ln) { | |
2117 | /* If it could work, try it. */ | |
2118 | if (c1 == -1000 || | |
3280af22 NIS |
2119 | UCHARAT(PL_reginput) == c1 || |
2120 | UCHARAT(PL_reginput) == c2) | |
a0ed51b3 LW |
2121 | { |
2122 | DEBUG_r( | |
c3464db5 DD |
2123 | PerlIO_printf(Perl_debug_log, |
2124 | "%*s trying tail with n=%ld...\n", | |
3280af22 | 2125 | REPORT_CODE_OFF+PL_regindent*2, "", n) |
a0ed51b3 LW |
2126 | ); |
2127 | if (paren) { | |
2128 | if (n) { | |
dfe13c55 | 2129 | PL_regstartp[paren] = HOPc(PL_reginput, -l); |
a0ed51b3 | 2130 | PL_regendp[paren] = PL_reginput; |
c277df42 | 2131 | } |
a0ed51b3 LW |
2132 | else |
2133 | PL_regendp[paren] = NULL; | |
c277df42 | 2134 | } |
a0ed51b3 LW |
2135 | if (regmatch(next)) |
2136 | sayYES; | |
2137 | REGCP_UNWIND; | |
2138 | } | |
c277df42 IZ |
2139 | /* Couldn't or didn't -- back up. */ |
2140 | n--; | |
dfe13c55 | 2141 | locinput = HOPc(locinput, -l); |
3280af22 | 2142 | PL_reginput = locinput; |
c277df42 IZ |
2143 | } |
2144 | } | |
2145 | sayNO; | |
2146 | break; | |
2147 | } | |
2148 | case CURLYN: | |
2149 | paren = scan->flags; /* Which paren to set */ | |
3280af22 NIS |
2150 | if (paren > PL_regsize) |
2151 | PL_regsize = paren; | |
2152 | if (paren > *PL_reglastparen) | |
2153 | *PL_reglastparen = paren; | |
c277df42 IZ |
2154 | ln = ARG1(scan); /* min to match */ |
2155 | n = ARG2(scan); /* max to match */ | |
dc45a647 | 2156 | scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE); |
c277df42 | 2157 | goto repeat; |
a0d0e21e | 2158 | case CURLY: |
c277df42 | 2159 | paren = 0; |
a0d0e21e LW |
2160 | ln = ARG1(scan); /* min to match */ |
2161 | n = ARG2(scan); /* max to match */ | |
dc45a647 | 2162 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
a0d0e21e LW |
2163 | goto repeat; |
2164 | case STAR: | |
2165 | ln = 0; | |
c277df42 | 2166 | n = REG_INFTY; |
a0d0e21e | 2167 | scan = NEXTOPER(scan); |
c277df42 | 2168 | paren = 0; |
a0d0e21e LW |
2169 | goto repeat; |
2170 | case PLUS: | |
c277df42 IZ |
2171 | ln = 1; |
2172 | n = REG_INFTY; | |
2173 | scan = NEXTOPER(scan); | |
2174 | paren = 0; | |
2175 | repeat: | |
a0d0e21e LW |
2176 | /* |
2177 | * Lookahead to avoid useless match attempts | |
2178 | * when we know what character comes next. | |
2179 | */ | |
22c35a8c | 2180 | if (PL_regkind[(U8)OP(next)] == EXACT) { |
bbce6d69 | 2181 | c1 = UCHARAT(OPERAND(next) + 1); |
2182 | if (OP(next) == EXACTF) | |
22c35a8c | 2183 | c2 = PL_fold[c1]; |
bbce6d69 | 2184 | else if (OP(next) == EXACTFL) |
22c35a8c | 2185 | c2 = PL_fold_locale[c1]; |
bbce6d69 | 2186 | else |
2187 | c2 = c1; | |
2188 | } | |
a0d0e21e | 2189 | else |
bbce6d69 | 2190 | c1 = c2 = -1000; |
3280af22 | 2191 | PL_reginput = locinput; |
a0d0e21e | 2192 | if (minmod) { |
c277df42 | 2193 | CHECKPOINT lastcp; |
a0d0e21e LW |
2194 | minmod = 0; |
2195 | if (ln && regrepeat(scan, ln) < ln) | |
4633a7c4 | 2196 | sayNO; |
a0ed51b3 | 2197 | locinput = PL_reginput; |
c277df42 IZ |
2198 | REGCP_SET; |
2199 | while (n >= ln || (n == REG_INFTY && ln > 0)) { /* ln overflow ? */ | |
a0d0e21e | 2200 | /* If it could work, try it. */ |
bbce6d69 | 2201 | if (c1 == -1000 || |
3280af22 NIS |
2202 | UCHARAT(PL_reginput) == c1 || |
2203 | UCHARAT(PL_reginput) == c2) | |
bbce6d69 | 2204 | { |
c277df42 IZ |
2205 | if (paren) { |
2206 | if (n) { | |
dfe13c55 | 2207 | PL_regstartp[paren] = HOPc(PL_reginput, -1); |
3280af22 | 2208 | PL_regendp[paren] = PL_reginput; |
a0ed51b3 LW |
2209 | } |
2210 | else | |
3280af22 | 2211 | PL_regendp[paren] = NULL; |
c277df42 | 2212 | } |
a0d0e21e | 2213 | if (regmatch(next)) |
4633a7c4 | 2214 | sayYES; |
c277df42 | 2215 | REGCP_UNWIND; |
bbce6d69 | 2216 | } |
c277df42 | 2217 | /* Couldn't or didn't -- move forward. */ |
a0ed51b3 | 2218 | PL_reginput = locinput; |
a0d0e21e LW |
2219 | if (regrepeat(scan, 1)) { |
2220 | ln++; | |
a0ed51b3 LW |
2221 | locinput = PL_reginput; |
2222 | } | |
2223 | else | |
4633a7c4 | 2224 | sayNO; |
a0d0e21e LW |
2225 | } |
2226 | } | |
2227 | else { | |
c277df42 | 2228 | CHECKPOINT lastcp; |
a0d0e21e | 2229 | n = regrepeat(scan, n); |
a0ed51b3 | 2230 | locinput = PL_reginput; |
22c35a8c | 2231 | if (ln < n && PL_regkind[(U8)OP(next)] == EOL && |
3280af22 | 2232 | (!PL_multiline || OP(next) == SEOL)) |
a0d0e21e | 2233 | ln = n; /* why back off? */ |
c277df42 IZ |
2234 | REGCP_SET; |
2235 | if (paren) { | |
2236 | while (n >= ln) { | |
2237 | /* If it could work, try it. */ | |
2238 | if (c1 == -1000 || | |
3280af22 NIS |
2239 | UCHARAT(PL_reginput) == c1 || |
2240 | UCHARAT(PL_reginput) == c2) | |
c277df42 IZ |
2241 | { |
2242 | if (paren && n) { | |
2243 | if (n) { | |
dfe13c55 | 2244 | PL_regstartp[paren] = HOPc(PL_reginput, -1); |
3280af22 | 2245 | PL_regendp[paren] = PL_reginput; |
a0ed51b3 LW |
2246 | } |
2247 | else | |
3280af22 | 2248 | PL_regendp[paren] = NULL; |
c277df42 IZ |
2249 | } |
2250 | if (regmatch(next)) | |
2251 | sayYES; | |
2252 | REGCP_UNWIND; | |
2253 | } | |
2254 | /* Couldn't or didn't -- back up. */ | |
2255 | n--; | |
dfe13c55 | 2256 | PL_reginput = locinput = HOPc(locinput, -1); |
c277df42 | 2257 | } |
a0ed51b3 LW |
2258 | } |
2259 | else { | |
c277df42 IZ |
2260 | while (n >= ln) { |
2261 | /* If it could work, try it. */ | |
2262 | if (c1 == -1000 || | |
3280af22 NIS |
2263 | UCHARAT(PL_reginput) == c1 || |
2264 | UCHARAT(PL_reginput) == c2) | |
c277df42 IZ |
2265 | { |
2266 | if (regmatch(next)) | |
2267 | sayYES; | |
2268 | REGCP_UNWIND; | |
2269 | } | |
2270 | /* Couldn't or didn't -- back up. */ | |
2271 | n--; | |
dfe13c55 | 2272 | PL_reginput = locinput = HOPc(locinput, -1); |
bbce6d69 | 2273 | } |
a0d0e21e LW |
2274 | } |
2275 | } | |
4633a7c4 | 2276 | sayNO; |
c277df42 | 2277 | break; |
a0d0e21e | 2278 | case END: |
0f5d15d6 IZ |
2279 | if (PL_reg_call_cc) { |
2280 | re_cc_state *cur_call_cc = PL_reg_call_cc; | |
2281 | CURCUR *cctmp = PL_regcc; | |
2282 | regexp *re = PL_reg_re; | |
2283 | CHECKPOINT cp, lastcp; | |
2284 | ||
2285 | cp = regcppush(0); /* Save *all* the positions. */ | |
2286 | REGCP_SET; | |
2287 | regcp_set_to(PL_reg_call_cc->ss); /* Restore parens of | |
2288 | the caller. */ | |
2289 | PL_reginput = locinput; /* Make position available to | |
2290 | the callcc. */ | |
2291 | cache_re(PL_reg_call_cc->re); | |
2292 | PL_regcc = PL_reg_call_cc->cc; | |
2293 | PL_reg_call_cc = PL_reg_call_cc->prev; | |
2294 | if (regmatch(cur_call_cc->node)) { | |
2295 | PL_reg_call_cc = cur_call_cc; | |
2296 | regcpblow(cp); | |
2297 | sayYES; | |
2298 | } | |
2299 | REGCP_UNWIND; | |
2300 | regcppop(); | |
2301 | PL_reg_call_cc = cur_call_cc; | |
2302 | PL_regcc = cctmp; | |
2303 | PL_reg_re = re; | |
2304 | cache_re(re); | |
2305 | ||
2306 | DEBUG_r( | |
2307 | PerlIO_printf(Perl_debug_log, | |
2308 | "%*s continuation failed...\n", | |
2309 | REPORT_CODE_OFF+PL_regindent*2, "") | |
2310 | ); | |
2311 | sayNO; | |
2312 | } | |
3280af22 | 2313 | if (locinput < PL_regtill) |
7e5428c5 IZ |
2314 | sayNO; /* Cannot match: too short. */ |
2315 | /* Fall through */ | |
2316 | case SUCCEED: | |
3280af22 | 2317 | PL_reginput = locinput; /* put where regtry can find it */ |
4633a7c4 | 2318 | sayYES; /* Success! */ |
c277df42 IZ |
2319 | case SUSPEND: |
2320 | n = 1; | |
9fe1d20c | 2321 | PL_reginput = locinput; |
c277df42 | 2322 | goto do_ifmatch; |
a0d0e21e | 2323 | case UNLESSM: |
c277df42 | 2324 | n = 0; |
a0ed51b3 | 2325 | if (scan->flags) { |
dfe13c55 | 2326 | s = HOPMAYBEc(locinput, -scan->flags); |
a0ed51b3 LW |
2327 | if (!s) |
2328 | goto say_yes; | |
2329 | PL_reginput = s; | |
2330 | } | |
2331 | else | |
2332 | PL_reginput = locinput; | |
c277df42 IZ |
2333 | goto do_ifmatch; |
2334 | case IFMATCH: | |
2335 | n = 1; | |
a0ed51b3 | 2336 | if (scan->flags) { |
dfe13c55 | 2337 | s = HOPMAYBEc(locinput, -scan->flags); |
642653c7 | 2338 | if (!s || s < PL_bostr) |
a0ed51b3 LW |
2339 | goto say_no; |
2340 | PL_reginput = s; | |
2341 | } | |
2342 | else | |
2343 | PL_reginput = locinput; | |
2344 | ||
c277df42 | 2345 | do_ifmatch: |
c277df42 IZ |
2346 | inner = NEXTOPER(NEXTOPER(scan)); |
2347 | if (regmatch(inner) != n) { | |
2348 | say_no: | |
2349 | if (logical) { | |
2350 | logical = 0; | |
2351 | sw = 0; | |
2352 | goto do_longjump; | |
a0ed51b3 LW |
2353 | } |
2354 | else | |
c277df42 IZ |
2355 | sayNO; |
2356 | } | |
2357 | say_yes: | |
2358 | if (logical) { | |
2359 | logical = 0; | |
2360 | sw = 1; | |
2361 | } | |
fe44a5e8 | 2362 | if (OP(scan) == SUSPEND) { |
3280af22 | 2363 | locinput = PL_reginput; |
565764a8 | 2364 | nextchr = UCHARAT(locinput); |
fe44a5e8 | 2365 | } |
c277df42 IZ |
2366 | /* FALL THROUGH. */ |
2367 | case LONGJMP: | |
2368 | do_longjump: | |
2369 | next = scan + ARG(scan); | |
2370 | if (next == scan) | |
2371 | next = NULL; | |
a0d0e21e LW |
2372 | break; |
2373 | default: | |
c030ccd9 | 2374 | PerlIO_printf(PerlIO_stderr(), "%lx %d\n", |
c277df42 | 2375 | (unsigned long)scan, OP(scan)); |
a0d0e21e | 2376 | FAIL("regexp memory corruption"); |
a687059c | 2377 | } |
a0d0e21e LW |
2378 | scan = next; |
2379 | } | |
a687059c | 2380 | |
a0d0e21e LW |
2381 | /* |
2382 | * We get here only if there's trouble -- normally "case END" is | |
2383 | * the terminating point. | |
2384 | */ | |
2385 | FAIL("corrupted regexp pointers"); | |
2386 | /*NOTREACHED*/ | |
4633a7c4 LW |
2387 | sayNO; |
2388 | ||
2389 | yes: | |
2390 | #ifdef DEBUGGING | |
3280af22 | 2391 | PL_regindent--; |
4633a7c4 LW |
2392 | #endif |
2393 | return 1; | |
2394 | ||
2395 | no: | |
2396 | #ifdef DEBUGGING | |
3280af22 | 2397 | PL_regindent--; |
4633a7c4 | 2398 | #endif |
a0d0e21e | 2399 | return 0; |
a687059c LW |
2400 | } |
2401 | ||
2402 | /* | |
2403 | - regrepeat - repeatedly match something simple, report how many | |
2404 | */ | |
2405 | /* | |
2406 | * [This routine now assumes that it will only match on things of length 1. | |
2407 | * That was true before, but now we assume scan - reginput is the count, | |
a0ed51b3 | 2408 | * rather than incrementing count on every character. [Er, except utf8.]] |
a687059c | 2409 | */ |
76e3520e | 2410 | STATIC I32 |
c277df42 | 2411 | regrepeat(regnode *p, I32 max) |
a687059c | 2412 | { |
5c0ca799 | 2413 | dTHR; |
a0d0e21e LW |
2414 | register char *scan; |
2415 | register char *opnd; | |
2416 | register I32 c; | |
3280af22 | 2417 | register char *loceol = PL_regeol; |
a0ed51b3 | 2418 | register I32 hardcount = 0; |
a0d0e21e | 2419 | |
3280af22 | 2420 | scan = PL_reginput; |
c277df42 | 2421 | if (max != REG_INFTY && max < loceol - scan) |
a0d0e21e | 2422 | loceol = scan + max; |
161b471a | 2423 | opnd = (char *) OPERAND(p); |
a0d0e21e | 2424 | switch (OP(p)) { |
22c35a8c | 2425 | case REG_ANY: |
a0d0e21e LW |
2426 | while (scan < loceol && *scan != '\n') |
2427 | scan++; | |
2428 | break; | |
2429 | case SANY: | |
2430 | scan = loceol; | |
2431 | break; | |
a0ed51b3 LW |
2432 | case ANYUTF8: |
2433 | loceol = PL_regeol; | |
2434 | while (scan < loceol && *scan != '\n') { | |
2435 | scan += UTF8SKIP(scan); | |
2436 | hardcount++; | |
2437 | } | |
2438 | break; | |
2439 | case SANYUTF8: | |
2440 | loceol = PL_regeol; | |
2441 | while (scan < loceol) { | |
2442 | scan += UTF8SKIP(scan); | |
2443 | hardcount++; | |
2444 | } | |
2445 | break; | |
bbce6d69 | 2446 | case EXACT: /* length of string is 1 */ |
2447 | c = UCHARAT(++opnd); | |
2448 | while (scan < loceol && UCHARAT(scan) == c) | |
2449 | scan++; | |
2450 | break; | |
2451 | case EXACTF: /* length of string is 1 */ | |
2452 | c = UCHARAT(++opnd); | |
2453 | while (scan < loceol && | |
22c35a8c | 2454 | (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c])) |
bbce6d69 | 2455 | scan++; |
2456 | break; | |
2457 | case EXACTFL: /* length of string is 1 */ | |
3280af22 | 2458 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 2459 | c = UCHARAT(++opnd); |
2460 | while (scan < loceol && | |
22c35a8c | 2461 | (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c])) |
a0d0e21e LW |
2462 | scan++; |
2463 | break; | |
a0ed51b3 LW |
2464 | case ANYOFUTF8: |
2465 | loceol = PL_regeol; | |
2466 | while (scan < loceol && REGINCLASSUTF8(p, (U8*)scan)) { | |
2467 | scan += UTF8SKIP(scan); | |
2468 | hardcount++; | |
2469 | } | |
2470 | break; | |
a0d0e21e | 2471 | case ANYOF: |
ae5c130c | 2472 | while (scan < loceol && REGINCLASS(opnd, *scan)) |
a0d0e21e | 2473 | scan++; |
a0d0e21e LW |
2474 | break; |
2475 | case ALNUM: | |
2476 | while (scan < loceol && isALNUM(*scan)) | |
2477 | scan++; | |
2478 | break; | |
a0ed51b3 LW |
2479 | case ALNUMUTF8: |
2480 | loceol = PL_regeol; | |
dfe13c55 | 2481 | while (scan < loceol && swash_fetch(PL_utf8_alnum, (U8*)scan)) { |
a0ed51b3 LW |
2482 | scan += UTF8SKIP(scan); |
2483 | hardcount++; | |
2484 | } | |
2485 | break; | |
bbce6d69 | 2486 | case ALNUML: |
3280af22 | 2487 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 2488 | while (scan < loceol && isALNUM_LC(*scan)) |
2489 | scan++; | |
2490 | break; | |
a0ed51b3 LW |
2491 | case ALNUMLUTF8: |
2492 | PL_reg_flags |= RF_tainted; | |
2493 | loceol = PL_regeol; | |
dfe13c55 | 2494 | while (scan < loceol && isALNUM_LC_utf8((U8*)scan)) { |
a0ed51b3 LW |
2495 | scan += UTF8SKIP(scan); |
2496 | hardcount++; | |
2497 | } | |
2498 | break; | |
2499 | break; | |
a0d0e21e LW |
2500 | case NALNUM: |
2501 | while (scan < loceol && !isALNUM(*scan)) | |
2502 | scan++; | |
2503 | break; | |
a0ed51b3 LW |
2504 | case NALNUMUTF8: |
2505 | loceol = PL_regeol; | |
dfe13c55 | 2506 | while (scan < loceol && !swash_fetch(PL_utf8_alnum, (U8*)scan)) { |
a0ed51b3 LW |
2507 | scan += UTF8SKIP(scan); |
2508 | hardcount++; | |
2509 | } | |
2510 | break; | |
bbce6d69 | 2511 | case NALNUML: |
3280af22 | 2512 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 2513 | while (scan < loceol && !isALNUM_LC(*scan)) |
2514 | scan++; | |
2515 | break; | |
a0ed51b3 LW |
2516 | case NALNUMLUTF8: |
2517 | PL_reg_flags |= RF_tainted; | |
2518 | loceol = PL_regeol; | |
dfe13c55 | 2519 | while (scan < loceol && !isALNUM_LC_utf8((U8*)scan)) { |
a0ed51b3 LW |
2520 | scan += UTF8SKIP(scan); |
2521 | hardcount++; | |
2522 | } | |
2523 | break; | |
a0d0e21e LW |
2524 | case SPACE: |
2525 | while (scan < loceol && isSPACE(*scan)) | |
2526 | scan++; | |
2527 | break; | |
a0ed51b3 LW |
2528 | case SPACEUTF8: |
2529 | loceol = PL_regeol; | |
dfe13c55 | 2530 | while (scan < loceol && (*scan == ' ' || swash_fetch(PL_utf8_space,(U8*)scan))) { |
a0ed51b3 LW |
2531 | scan += UTF8SKIP(scan); |
2532 | hardcount++; | |
2533 | } | |
2534 | break; | |
bbce6d69 | 2535 | case SPACEL: |
3280af22 | 2536 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 2537 | while (scan < loceol && isSPACE_LC(*scan)) |
2538 | scan++; | |
2539 | break; | |
a0ed51b3 LW |
2540 | case SPACELUTF8: |
2541 | PL_reg_flags |= RF_tainted; | |
2542 | loceol = PL_regeol; | |
dfe13c55 | 2543 | while (scan < loceol && (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
a0ed51b3 LW |
2544 | scan += UTF8SKIP(scan); |
2545 | hardcount++; | |
2546 | } | |
2547 | break; | |
a0d0e21e LW |
2548 | case NSPACE: |
2549 | while (scan < loceol && !isSPACE(*scan)) | |
2550 | scan++; | |
2551 | break; | |
a0ed51b3 LW |
2552 | case NSPACEUTF8: |
2553 | loceol = PL_regeol; | |
dfe13c55 | 2554 | while (scan < loceol && !(*scan == ' ' || swash_fetch(PL_utf8_space,(U8*)scan))) { |
a0ed51b3 LW |
2555 | scan += UTF8SKIP(scan); |
2556 | hardcount++; | |
2557 | } | |
2558 | break; | |
bbce6d69 | 2559 | case NSPACEL: |
3280af22 | 2560 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 2561 | while (scan < loceol && !isSPACE_LC(*scan)) |
2562 | scan++; | |
2563 | break; | |
a0ed51b3 LW |
2564 | case NSPACELUTF8: |
2565 | PL_reg_flags |= RF_tainted; | |
2566 | loceol = PL_regeol; | |
dfe13c55 | 2567 | while (scan < loceol && !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
a0ed51b3 LW |
2568 | scan += UTF8SKIP(scan); |
2569 | hardcount++; | |
2570 | } | |
2571 | break; | |
a0d0e21e LW |
2572 | case DIGIT: |
2573 | while (scan < loceol && isDIGIT(*scan)) | |
2574 | scan++; | |
2575 | break; | |
a0ed51b3 LW |
2576 | case DIGITUTF8: |
2577 | loceol = PL_regeol; | |
dfe13c55 | 2578 | while (scan < loceol && swash_fetch(PL_utf8_digit,(U8*)scan)) { |
a0ed51b3 LW |
2579 | scan += UTF8SKIP(scan); |
2580 | hardcount++; | |
2581 | } | |
2582 | break; | |
2583 | break; | |
a0d0e21e LW |
2584 | case NDIGIT: |
2585 | while (scan < loceol && !isDIGIT(*scan)) | |
2586 | scan++; | |
2587 | break; | |
a0ed51b3 LW |
2588 | case NDIGITUTF8: |
2589 | loceol = PL_regeol; | |
dfe13c55 | 2590 | while (scan < loceol && !swash_fetch(PL_utf8_digit,(U8*)scan)) { |
a0ed51b3 LW |
2591 | scan += UTF8SKIP(scan); |
2592 | hardcount++; | |
2593 | } | |
2594 | break; | |
a0d0e21e LW |
2595 | default: /* Called on something of 0 width. */ |
2596 | break; /* So match right here or not at all. */ | |
2597 | } | |
a687059c | 2598 | |
a0ed51b3 LW |
2599 | if (hardcount) |
2600 | c = hardcount; | |
2601 | else | |
2602 | c = scan - PL_reginput; | |
3280af22 | 2603 | PL_reginput = scan; |
a687059c | 2604 | |
c277df42 IZ |
2605 | DEBUG_r( |
2606 | { | |
2607 | SV *prop = sv_newmortal(); | |
2608 | ||
2609 | regprop(prop, p); | |
2610 | PerlIO_printf(Perl_debug_log, | |
2611 | "%*s %s can match %ld times out of %ld...\n", | |
2612 | REPORT_CODE_OFF+1, "", SvPVX(prop),c,max); | |
2613 | }); | |
2614 | ||
a0d0e21e | 2615 | return(c); |
a687059c LW |
2616 | } |
2617 | ||
2618 | /* | |
c277df42 IZ |
2619 | - regrepeat_hard - repeatedly match something, report total lenth and length |
2620 | * | |
2621 | * The repeater is supposed to have constant length. | |
2622 | */ | |
2623 | ||
76e3520e | 2624 | STATIC I32 |
c277df42 IZ |
2625 | regrepeat_hard(regnode *p, I32 max, I32 *lp) |
2626 | { | |
5c0ca799 | 2627 | dTHR; |
c277df42 IZ |
2628 | register char *scan; |
2629 | register char *start; | |
3280af22 | 2630 | register char *loceol = PL_regeol; |
a0ed51b3 | 2631 | I32 l = 0; |
708e3b05 | 2632 | I32 count = 0, res = 1; |
a0ed51b3 LW |
2633 | |
2634 | if (!max) | |
2635 | return 0; | |
c277df42 | 2636 | |
3280af22 | 2637 | start = PL_reginput; |
a0ed51b3 | 2638 | if (UTF) { |
708e3b05 | 2639 | while (PL_reginput < loceol && (scan = PL_reginput, res = regmatch(p))) { |
a0ed51b3 LW |
2640 | if (!count++) { |
2641 | l = 0; | |
2642 | while (start < PL_reginput) { | |
2643 | l++; | |
2644 | start += UTF8SKIP(start); | |
2645 | } | |
2646 | *lp = l; | |
2647 | if (l == 0) | |
2648 | return max; | |
2649 | } | |
2650 | if (count == max) | |
2651 | return count; | |
2652 | } | |
2653 | } | |
2654 | else { | |
708e3b05 | 2655 | while (PL_reginput < loceol && (scan = PL_reginput, res = regmatch(p))) { |
a0ed51b3 LW |
2656 | if (!count++) { |
2657 | *lp = l = PL_reginput - start; | |
2658 | if (max != REG_INFTY && l*max < loceol - scan) | |
2659 | loceol = scan + l*max; | |
2660 | if (l == 0) | |
2661 | return max; | |
c277df42 IZ |
2662 | } |
2663 | } | |
2664 | } | |
708e3b05 | 2665 | if (!res) |
3280af22 | 2666 | PL_reginput = scan; |
c277df42 | 2667 | |
a0ed51b3 | 2668 | return count; |
c277df42 IZ |
2669 | } |
2670 | ||
2671 | /* | |
bbce6d69 | 2672 | - regclass - determine if a character falls into a character class |
2673 | */ | |
2674 | ||
76e3520e | 2675 | STATIC bool |
8ac85365 | 2676 | reginclass(register char *p, register I32 c) |
bbce6d69 | 2677 | { |
5c0ca799 | 2678 | dTHR; |
bbce6d69 | 2679 | char flags = *p; |
2680 | bool match = FALSE; | |
2681 | ||
2682 | c &= 0xFF; | |
ae5c130c | 2683 | if (ANYOF_TEST(p, c)) |
bbce6d69 | 2684 | match = TRUE; |
2685 | else if (flags & ANYOF_FOLD) { | |
2686 | I32 cf; | |
2687 | if (flags & ANYOF_LOCALE) { | |
3280af22 | 2688 | PL_reg_flags |= RF_tainted; |
22c35a8c | 2689 | cf = PL_fold_locale[c]; |
bbce6d69 | 2690 | } |
2691 | else | |
22c35a8c | 2692 | cf = PL_fold[c]; |
ae5c130c | 2693 | if (ANYOF_TEST(p, cf)) |
bbce6d69 | 2694 | match = TRUE; |
2695 | } | |
2696 | ||
2697 | if (!match && (flags & ANYOF_ISA)) { | |
3280af22 | 2698 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 2699 | |
2700 | if (((flags & ANYOF_ALNUML) && isALNUM_LC(c)) || | |
2701 | ((flags & ANYOF_NALNUML) && !isALNUM_LC(c)) || | |
2702 | ((flags & ANYOF_SPACEL) && isSPACE_LC(c)) || | |
2703 | ((flags & ANYOF_NSPACEL) && !isSPACE_LC(c))) | |
2704 | { | |
2705 | match = TRUE; | |
2706 | } | |
2707 | } | |
2708 | ||
ae5c130c | 2709 | return (flags & ANYOF_INVERT) ? !match : match; |
bbce6d69 | 2710 | } |
2711 | ||
a0ed51b3 LW |
2712 | STATIC bool |
2713 | reginclassutf8(regnode *f, U8 *p) | |
c485e607 NIS |
2714 | { |
2715 | dTHR; | |
a0ed51b3 LW |
2716 | char flags = ARG1(f); |
2717 | bool match = FALSE; | |
2718 | SV *sv = (SV*)PL_regdata->data[ARG2(f)]; | |
2719 | ||
2720 | if (swash_fetch(sv, p)) | |
2721 | match = TRUE; | |
2722 | else if (flags & ANYOF_FOLD) { | |
2723 | I32 cf; | |
dfe13c55 | 2724 | U8 tmpbuf[10]; |
a0ed51b3 LW |
2725 | if (flags & ANYOF_LOCALE) { |
2726 | PL_reg_flags |= RF_tainted; | |
2727 | uv_to_utf8(tmpbuf, toLOWER_LC_utf8(p)); | |
2728 | } | |
2729 | else | |
2730 | uv_to_utf8(tmpbuf, toLOWER_utf8(p)); | |
2731 | if (swash_fetch(sv, tmpbuf)) | |
2732 | match = TRUE; | |
2733 | } | |
2734 | ||
2735 | if (!match && (flags & ANYOF_ISA)) { | |
2736 | PL_reg_flags |= RF_tainted; | |
2737 | ||
2738 | if (((flags & ANYOF_ALNUML) && isALNUM_LC_utf8(p)) || | |
2739 | ((flags & ANYOF_NALNUML) && !isALNUM_LC_utf8(p)) || | |
2740 | ((flags & ANYOF_SPACEL) && isSPACE_LC_utf8(p)) || | |
2741 | ((flags & ANYOF_NSPACEL) && !isSPACE_LC_utf8(p))) | |
2742 | { | |
2743 | match = TRUE; | |
2744 | } | |
2745 | } | |
2746 | ||
2747 | return (flags & ANYOF_INVERT) ? !match : match; | |
2748 | } | |
161b471a | 2749 | |
dfe13c55 GS |
2750 | STATIC U8 * |
2751 | reghop(U8 *s, I32 off) | |
c485e607 NIS |
2752 | { |
2753 | dTHR; | |
a0ed51b3 LW |
2754 | if (off >= 0) { |
2755 | while (off-- && s < (U8*)PL_regeol) | |
2756 | s += UTF8SKIP(s); | |
2757 | } | |
2758 | else { | |
2759 | while (off++) { | |
2760 | if (s > (U8*)PL_bostr) { | |
2761 | s--; | |
2762 | if (*s & 0x80) { | |
2763 | while (s > (U8*)PL_bostr && (*s & 0xc0) == 0x80) | |
2764 | s--; | |
2765 | } /* XXX could check well-formedness here */ | |
2766 | } | |
2767 | } | |
2768 | } | |
2769 | return s; | |
2770 | } | |
161b471a | 2771 | |
dfe13c55 GS |
2772 | STATIC U8 * |
2773 | reghopmaybe(U8* s, I32 off) | |
a0ed51b3 | 2774 | { |
c485e607 | 2775 | dTHR; |
a0ed51b3 LW |
2776 | if (off >= 0) { |
2777 | while (off-- && s < (U8*)PL_regeol) | |
2778 | s += UTF8SKIP(s); | |
2779 | if (off >= 0) | |
2780 | return 0; | |
2781 | } | |
2782 | else { | |
2783 | while (off++) { | |
2784 | if (s > (U8*)PL_bostr) { | |
2785 | s--; | |
2786 | if (*s & 0x80) { | |
2787 | while (s > (U8*)PL_bostr && (*s & 0xc0) == 0x80) | |
2788 | s--; | |
2789 | } /* XXX could check well-formedness here */ | |
2790 | } | |
2791 | else | |
2792 | break; | |
2793 | } | |
2794 | if (off <= 0) | |
2795 | return 0; | |
2796 | } | |
2797 | return s; | |
2798 | } |