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 */ | |
cad2e5aa | 28 | # if defined(PERL_EXT_RE_DEBUG) && !defined(DEBUGGING) |
b9d5759e AD |
29 | # define DEBUGGING |
30 | # endif | |
31 | #endif | |
32 | ||
33 | #ifdef PERL_IN_XSUB_RE | |
d06ea78c | 34 | /* We *really* need to overwrite these symbols: */ |
56953603 IZ |
35 | # define Perl_regexec_flags my_regexec |
36 | # define Perl_regdump my_regdump | |
37 | # define Perl_regprop my_regprop | |
cad2e5aa | 38 | # define Perl_re_intuit_start my_re_intuit_start |
d06ea78c GS |
39 | /* *These* symbols are masked to allow static link. */ |
40 | # define Perl_pregexec my_pregexec | |
d88dccdf | 41 | # define Perl_reginitcolors my_reginitcolors |
c5be433b GS |
42 | |
43 | # define PERL_NO_GET_CONTEXT | |
56953603 IZ |
44 | #endif |
45 | ||
f0fcb552 | 46 | /*SUPPRESS 112*/ |
a687059c | 47 | /* |
e50aee73 | 48 | * pregcomp and pregexec -- regsub and regerror are not used in perl |
a687059c LW |
49 | * |
50 | * Copyright (c) 1986 by University of Toronto. | |
51 | * Written by Henry Spencer. Not derived from licensed software. | |
52 | * | |
53 | * Permission is granted to anyone to use this software for any | |
54 | * purpose on any computer system, and to redistribute it freely, | |
55 | * subject to the following restrictions: | |
56 | * | |
57 | * 1. The author is not responsible for the consequences of use of | |
58 | * this software, no matter how awful, even if they arise | |
59 | * from defects in it. | |
60 | * | |
61 | * 2. The origin of this software must not be misrepresented, either | |
62 | * by explicit claim or by omission. | |
63 | * | |
64 | * 3. Altered versions must be plainly marked as such, and must not | |
65 | * be misrepresented as being the original software. | |
66 | * | |
67 | **** Alterations to Henry's code are... | |
68 | **** | |
4eb8286e | 69 | **** Copyright (c) 1991-1999, Larry Wall |
a687059c | 70 | **** |
9ef589d8 LW |
71 | **** You may distribute under the terms of either the GNU General Public |
72 | **** License or the Artistic License, as specified in the README file. | |
a687059c LW |
73 | * |
74 | * Beware that some of this code is subtly aware of the way operator | |
75 | * precedence is structured in regular expressions. Serious changes in | |
76 | * regular-expression syntax might require a total rethink. | |
77 | */ | |
78 | #include "EXTERN.h" | |
864dbfa3 | 79 | #define PERL_IN_REGEXEC_C |
a687059c | 80 | #include "perl.h" |
0f5d15d6 | 81 | |
c5be433b GS |
82 | #ifdef PERL_IN_XSUB_RE |
83 | # if defined(PERL_CAPI) || defined(PERL_OBJECT) | |
84 | # include "XSUB.h" | |
85 | # endif | |
86 | #endif | |
87 | ||
a687059c LW |
88 | #include "regcomp.h" |
89 | ||
c277df42 IZ |
90 | #define RF_tainted 1 /* tainted information used? */ |
91 | #define RF_warned 2 /* warned about big count? */ | |
ce862d02 | 92 | #define RF_evaled 4 /* Did an EVAL with setting? */ |
a0ed51b3 LW |
93 | #define RF_utf8 8 /* String contains multibyte chars? */ |
94 | ||
95 | #define UTF (PL_reg_flags & RF_utf8) | |
ce862d02 IZ |
96 | |
97 | #define RS_init 1 /* eval environment created */ | |
98 | #define RS_set 2 /* replsv value is set */ | |
c277df42 | 99 | |
a687059c LW |
100 | #ifndef STATIC |
101 | #define STATIC static | |
102 | #endif | |
103 | ||
c277df42 IZ |
104 | /* |
105 | * Forwards. | |
106 | */ | |
107 | ||
b8c5462f | 108 | #define REGINCLASS(p,c) (ANYOF_FLAGS(p) ? reginclass(p,c) : ANYOF_BITMAP_TEST(p,c)) |
a0ed51b3 LW |
109 | #define REGINCLASSUTF8(f,p) (ARG1(f) ? reginclassutf8(f,p) : swash_fetch((SV*)PL_regdata->data[ARG2(f)],p)) |
110 | ||
111 | #define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv)) | |
112 | #define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b) | |
113 | ||
dfe13c55 GS |
114 | #define reghop_c(pos,off) ((char*)reghop((U8*)pos, off)) |
115 | #define reghopmaybe_c(pos,off) ((char*)reghopmaybe((U8*)pos, off)) | |
116 | #define HOP(pos,off) (UTF ? reghop((U8*)pos, off) : (U8*)(pos + off)) | |
117 | #define HOPMAYBE(pos,off) (UTF ? reghopmaybe((U8*)pos, off) : (U8*)(pos + off)) | |
118 | #define HOPc(pos,off) ((char*)HOP(pos,off)) | |
119 | #define HOPMAYBEc(pos,off) ((char*)HOPMAYBE(pos,off)) | |
a0d0e21e | 120 | |
51371543 GS |
121 | static void restore_pos(pTHXo_ void *arg); |
122 | ||
123 | ||
76e3520e | 124 | STATIC CHECKPOINT |
cea2e8a9 | 125 | S_regcppush(pTHX_ I32 parenfloor) |
a0d0e21e | 126 | { |
11343788 | 127 | dTHR; |
3280af22 NIS |
128 | int retval = PL_savestack_ix; |
129 | int i = (PL_regsize - parenfloor) * 4; | |
a0d0e21e LW |
130 | int p; |
131 | ||
132 | SSCHECK(i + 5); | |
3280af22 | 133 | for (p = PL_regsize; p > parenfloor; p--) { |
cf93c79d IZ |
134 | SSPUSHINT(PL_regendp[p]); |
135 | SSPUSHINT(PL_regstartp[p]); | |
3280af22 | 136 | SSPUSHPTR(PL_reg_start_tmp[p]); |
a0d0e21e LW |
137 | SSPUSHINT(p); |
138 | } | |
3280af22 NIS |
139 | SSPUSHINT(PL_regsize); |
140 | SSPUSHINT(*PL_reglastparen); | |
141 | SSPUSHPTR(PL_reginput); | |
a0d0e21e LW |
142 | SSPUSHINT(i + 3); |
143 | SSPUSHINT(SAVEt_REGCONTEXT); | |
144 | return retval; | |
145 | } | |
146 | ||
c277df42 | 147 | /* These are needed since we do not localize EVAL nodes: */ |
c3464db5 | 148 | # define REGCP_SET DEBUG_r(PerlIO_printf(Perl_debug_log, \ |
faccc32b JH |
149 | " Setting an EVAL scope, savestack=%"IVdf"\n", \ |
150 | (IV)PL_savestack_ix)); lastcp = PL_savestack_ix | |
c3464db5 | 151 | |
3280af22 | 152 | # define REGCP_UNWIND DEBUG_r(lastcp != PL_savestack_ix ? \ |
c3464db5 | 153 | PerlIO_printf(Perl_debug_log, \ |
faccc32b JH |
154 | " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \ |
155 | (IV)lastcp, (IV)PL_savestack_ix) : 0); regcpblow(lastcp) | |
c277df42 | 156 | |
76e3520e | 157 | STATIC char * |
cea2e8a9 | 158 | S_regcppop(pTHX) |
a0d0e21e | 159 | { |
11343788 | 160 | dTHR; |
a0d0e21e LW |
161 | I32 i = SSPOPINT; |
162 | U32 paren = 0; | |
163 | char *input; | |
cf93c79d | 164 | I32 tmps; |
a0d0e21e LW |
165 | assert(i == SAVEt_REGCONTEXT); |
166 | i = SSPOPINT; | |
167 | input = (char *) SSPOPPTR; | |
3280af22 NIS |
168 | *PL_reglastparen = SSPOPINT; |
169 | PL_regsize = SSPOPINT; | |
c277df42 | 170 | for (i -= 3; i > 0; i -= 4) { |
a0d0e21e | 171 | paren = (U32)SSPOPINT; |
3280af22 | 172 | PL_reg_start_tmp[paren] = (char *) SSPOPPTR; |
cf93c79d IZ |
173 | PL_regstartp[paren] = SSPOPINT; |
174 | tmps = SSPOPINT; | |
3280af22 NIS |
175 | if (paren <= *PL_reglastparen) |
176 | PL_regendp[paren] = tmps; | |
c277df42 | 177 | DEBUG_r( |
c3464db5 | 178 | PerlIO_printf(Perl_debug_log, |
b900a521 JH |
179 | " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n", |
180 | (UV)paren, (IV)PL_regstartp[paren], | |
181 | (IV)(PL_reg_start_tmp[paren] - PL_bostr), | |
182 | (IV)PL_regendp[paren], | |
3280af22 | 183 | (paren > *PL_reglastparen ? "(no)" : "")); |
c277df42 | 184 | ); |
a0d0e21e | 185 | } |
c277df42 | 186 | DEBUG_r( |
3280af22 | 187 | if (*PL_reglastparen + 1 <= PL_regnpar) { |
c3464db5 | 188 | PerlIO_printf(Perl_debug_log, |
faccc32b JH |
189 | " restoring \\%"IVdf"..\\%"IVdf" to undef\n", |
190 | (IV)(*PL_reglastparen + 1), (IV)PL_regnpar); | |
c277df42 IZ |
191 | } |
192 | ); | |
3280af22 NIS |
193 | for (paren = *PL_reglastparen + 1; paren <= PL_regnpar; paren++) { |
194 | if (paren > PL_regsize) | |
cf93c79d IZ |
195 | PL_regstartp[paren] = -1; |
196 | PL_regendp[paren] = -1; | |
a0d0e21e LW |
197 | } |
198 | return input; | |
199 | } | |
200 | ||
0f5d15d6 | 201 | STATIC char * |
cea2e8a9 | 202 | S_regcp_set_to(pTHX_ I32 ss) |
0f5d15d6 | 203 | { |
46124e9e | 204 | dTHR; |
0f5d15d6 IZ |
205 | I32 tmp = PL_savestack_ix; |
206 | ||
207 | PL_savestack_ix = ss; | |
208 | regcppop(); | |
209 | PL_savestack_ix = tmp; | |
942e002e | 210 | return Nullch; |
0f5d15d6 IZ |
211 | } |
212 | ||
213 | typedef struct re_cc_state | |
214 | { | |
215 | I32 ss; | |
216 | regnode *node; | |
217 | struct re_cc_state *prev; | |
218 | CURCUR *cc; | |
219 | regexp *re; | |
220 | } re_cc_state; | |
221 | ||
c277df42 | 222 | #define regcpblow(cp) LEAVE_SCOPE(cp) |
a0d0e21e | 223 | |
a687059c | 224 | /* |
e50aee73 | 225 | * pregexec and friends |
a687059c LW |
226 | */ |
227 | ||
228 | /* | |
c277df42 | 229 | - pregexec - match a regexp against a string |
a687059c | 230 | */ |
c277df42 | 231 | I32 |
864dbfa3 | 232 | Perl_pregexec(pTHX_ register regexp *prog, char *stringarg, register char *strend, |
c3464db5 | 233 | char *strbeg, I32 minend, SV *screamer, U32 nosave) |
c277df42 IZ |
234 | /* strend: pointer to null at end of string */ |
235 | /* strbeg: real beginning of string */ | |
236 | /* minend: end of match must be >=minend after stringarg. */ | |
237 | /* nosave: For optimizations. */ | |
238 | { | |
239 | return | |
240 | regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL, | |
241 | nosave ? 0 : REXEC_COPY_STR); | |
242 | } | |
0f5d15d6 IZ |
243 | |
244 | STATIC void | |
cea2e8a9 | 245 | S_cache_re(pTHX_ regexp *prog) |
0f5d15d6 | 246 | { |
46124e9e | 247 | dTHR; |
0f5d15d6 IZ |
248 | PL_regprecomp = prog->precomp; /* Needed for FAIL. */ |
249 | #ifdef DEBUGGING | |
250 | PL_regprogram = prog->program; | |
251 | #endif | |
252 | PL_regnpar = prog->nparens; | |
253 | PL_regdata = prog->data; | |
254 | PL_reg_re = prog; | |
255 | } | |
22e551b9 | 256 | |
cad2e5aa JH |
257 | /* |
258 | * Need to implement the following flags for reg_anch: | |
259 | * | |
260 | * USE_INTUIT_NOML - Useful to call re_intuit_start() first | |
261 | * USE_INTUIT_ML | |
262 | * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer | |
263 | * INTUIT_AUTORITATIVE_ML | |
264 | * INTUIT_ONCE_NOML - Intuit can match in one location only. | |
265 | * INTUIT_ONCE_ML | |
266 | * | |
267 | * Another flag for this function: SECOND_TIME (so that float substrs | |
268 | * with giant delta may be not rechecked). | |
269 | */ | |
270 | ||
271 | /* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */ | |
272 | ||
2c2d71f5 | 273 | /* If SCREAM, then SvPVX(sv) should be compatible with strpos and strend. |
cad2e5aa JH |
274 | Otherwise, only SvCUR(sv) is used to get strbeg. */ |
275 | ||
276 | /* XXXX We assume that strpos is strbeg unless sv. */ | |
277 | ||
6eb5f6b9 JH |
278 | /* XXXX Some places assume that there is a fixed substring. |
279 | An update may be needed if optimizer marks as "INTUITable" | |
280 | RExen without fixed substrings. Similarly, it is assumed that | |
281 | lengths of all the strings are no more than minlen, thus they | |
282 | cannot come from lookahead. | |
283 | (Or minlen should take into account lookahead.) */ | |
284 | ||
2c2d71f5 JH |
285 | /* A failure to find a constant substring means that there is no need to make |
286 | an expensive call to REx engine, thus we celebrate a failure. Similarly, | |
287 | finding a substring too deep into the string means that less calls to | |
30944b6d IZ |
288 | regtry() should be needed. |
289 | ||
290 | REx compiler's optimizer found 4 possible hints: | |
291 | a) Anchored substring; | |
292 | b) Fixed substring; | |
293 | c) Whether we are anchored (beginning-of-line or \G); | |
294 | d) First node (of those at offset 0) which may distingush positions; | |
6eb5f6b9 | 295 | We use a)b)d) and multiline-part of c), and try to find a position in the |
30944b6d IZ |
296 | string which does not contradict any of them. |
297 | */ | |
2c2d71f5 | 298 | |
6eb5f6b9 JH |
299 | /* Most of decisions we do here should have been done at compile time. |
300 | The nodes of the REx which we used for the search should have been | |
301 | deleted from the finite automaton. */ | |
302 | ||
cad2e5aa JH |
303 | char * |
304 | Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, | |
305 | char *strend, U32 flags, re_scream_pos_data *data) | |
306 | { | |
2c2d71f5 | 307 | register I32 start_shift; |
cad2e5aa | 308 | /* Should be nonnegative! */ |
2c2d71f5 JH |
309 | register I32 end_shift; |
310 | register char *s; | |
311 | register SV *check; | |
cad2e5aa JH |
312 | char *t; |
313 | I32 ml_anch; | |
2c2d71f5 | 314 | char *tmp; |
6eb5f6b9 JH |
315 | register char *other_last = Nullch; /* other substr checked before this */ |
316 | char *check_at; /* check substr found at this pos */ | |
30944b6d IZ |
317 | #ifdef DEBUGGING |
318 | char *i_strpos = strpos; | |
319 | #endif | |
cad2e5aa JH |
320 | |
321 | DEBUG_r( if (!PL_colorset) reginitcolors() ); | |
322 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
2c2d71f5 | 323 | "%sGuessing start of match, REx%s `%s%.60s%s%s' against `%s%.*s%s%s'...\n", |
cad2e5aa JH |
324 | PL_colors[4],PL_colors[5],PL_colors[0], |
325 | prog->precomp, | |
326 | PL_colors[1], | |
327 | (strlen(prog->precomp) > 60 ? "..." : ""), | |
328 | PL_colors[0], | |
b900a521 | 329 | (int)(strend - strpos > 60 ? 60 : strend - strpos), |
cad2e5aa JH |
330 | strpos, PL_colors[1], |
331 | (strend - strpos > 60 ? "..." : "")) | |
332 | ); | |
333 | ||
2c2d71f5 JH |
334 | if (prog->minlen > strend - strpos) { |
335 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String too short...\n")); | |
cad2e5aa | 336 | goto fail; |
2c2d71f5 JH |
337 | } |
338 | if (prog->reganch & ROPT_ANCH) { /* Match at beg-of-str or after \n */ | |
cad2e5aa JH |
339 | ml_anch = !( (prog->reganch & ROPT_ANCH_SINGLE) |
340 | || ( (prog->reganch & ROPT_ANCH_BOL) | |
2c2d71f5 | 341 | && !PL_multiline ) ); /* Check after \n? */ |
cad2e5aa JH |
342 | |
343 | if ((prog->check_offset_min == prog->check_offset_max) && !ml_anch) { | |
2c2d71f5 | 344 | /* Substring at constant offset from beg-of-str... */ |
cad2e5aa JH |
345 | I32 slen; |
346 | ||
347 | if ( !(prog->reganch & ROPT_ANCH_GPOS) /* Checked by the caller */ | |
2c2d71f5 JH |
348 | && (sv && (strpos + SvCUR(sv) != strend)) ) { |
349 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Not at start...\n")); | |
cad2e5aa | 350 | goto fail; |
2c2d71f5 | 351 | } |
adac82c7 | 352 | PL_regeol = strend; /* Used in HOP() */ |
2c2d71f5 | 353 | s = HOPc(strpos, prog->check_offset_min); |
cad2e5aa JH |
354 | if (SvTAIL(prog->check_substr)) { |
355 | slen = SvCUR(prog->check_substr); /* >= 1 */ | |
356 | ||
2c2d71f5 JH |
357 | if ( strend - s > slen || strend - s < slen - 1 |
358 | || (strend - s == slen && strend[-1] != '\n')) { | |
359 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String too long...\n")); | |
360 | goto fail_finish; | |
cad2e5aa JH |
361 | } |
362 | /* Now should match s[0..slen-2] */ | |
363 | slen--; | |
364 | if (slen && (*SvPVX(prog->check_substr) != *s | |
365 | || (slen > 1 | |
2c2d71f5 JH |
366 | && memNE(SvPVX(prog->check_substr), s, slen)))) { |
367 | report_neq: | |
368 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String not equal...\n")); | |
369 | goto fail_finish; | |
370 | } | |
cad2e5aa JH |
371 | } |
372 | else if (*SvPVX(prog->check_substr) != *s | |
373 | || ((slen = SvCUR(prog->check_substr)) > 1 | |
374 | && memNE(SvPVX(prog->check_substr), s, slen))) | |
2c2d71f5 JH |
375 | goto report_neq; |
376 | goto success_at_start; | |
cad2e5aa | 377 | } |
2c2d71f5 | 378 | /* Match is anchored, but substr is not anchored wrt beg-of-str. */ |
cad2e5aa | 379 | s = strpos; |
2c2d71f5 JH |
380 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
381 | /* Should be nonnegative! */ | |
382 | end_shift = prog->minlen - start_shift - | |
383 | CHR_SVLEN(prog->check_substr) + (SvTAIL(prog->check_substr) != 0); | |
384 | if (!ml_anch) { | |
385 | I32 end = prog->check_offset_max + CHR_SVLEN(prog->check_substr) | |
386 | - (SvTAIL(prog->check_substr) != 0); | |
387 | I32 eshift = strend - s - end; | |
388 | ||
389 | if (end_shift < eshift) | |
390 | end_shift = eshift; | |
391 | } | |
cad2e5aa | 392 | } |
2c2d71f5 | 393 | else { /* Can match at random position */ |
cad2e5aa JH |
394 | ml_anch = 0; |
395 | s = strpos; | |
2c2d71f5 JH |
396 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
397 | /* Should be nonnegative! */ | |
398 | end_shift = prog->minlen - start_shift - | |
399 | CHR_SVLEN(prog->check_substr) + (SvTAIL(prog->check_substr) != 0); | |
cad2e5aa JH |
400 | } |
401 | ||
2c2d71f5 | 402 | #ifdef DEBUGGING /* 7/99: reports of failure (with the older version) */ |
0033605d | 403 | if (end_shift < 0) |
6bbae5e6 | 404 | Perl_croak(aTHX_ "panic: end_shift"); |
2c2d71f5 JH |
405 | #endif |
406 | ||
407 | check = prog->check_substr; | |
408 | restart: | |
409 | /* Find a possible match in the region s..strend by looking for | |
410 | the "check" substring in the region corrected by start/end_shift. */ | |
cad2e5aa | 411 | if (flags & REXEC_SCREAM) { |
cad2e5aa JH |
412 | char *strbeg = SvPVX(sv); /* XXXX Assume PV_force() on SCREAM! */ |
413 | I32 p = -1; /* Internal iterator of scream. */ | |
414 | I32 *pp = data ? data->scream_pos : &p; | |
415 | ||
2c2d71f5 JH |
416 | if (PL_screamfirst[BmRARE(check)] >= 0 |
417 | || ( BmRARE(check) == '\n' | |
418 | && (BmPREVIOUS(check) == SvCUR(check) - 1) | |
419 | && SvTAIL(check) )) | |
420 | s = screaminstr(sv, check, | |
421 | start_shift + (s - strbeg), end_shift, pp, 0); | |
cad2e5aa | 422 | else |
2c2d71f5 | 423 | goto fail_finish; |
cad2e5aa JH |
424 | if (data) |
425 | *data->scream_olds = s; | |
426 | } | |
427 | else | |
428 | s = fbm_instr((unsigned char*)s + start_shift, | |
429 | (unsigned char*)strend - end_shift, | |
2c2d71f5 | 430 | check, PL_multiline ? FBMrf_MULTILINE : 0); |
cad2e5aa JH |
431 | |
432 | /* Update the count-of-usability, remove useless subpatterns, | |
433 | unshift s. */ | |
2c2d71f5 JH |
434 | |
435 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%s %s substr `%s%.*s%s'%s%s", | |
436 | (s ? "Found" : "Did not find"), | |
437 | ((check == prog->anchored_substr) ? "anchored" : "floating"), | |
438 | PL_colors[0], | |
7b0972df JH |
439 | (int)(SvCUR(check) - (SvTAIL(check)!=0)), |
440 | SvPVX(check), | |
2c2d71f5 JH |
441 | PL_colors[1], (SvTAIL(check) ? "$" : ""), |
442 | (s ? " at offset " : "...\n") ) ); | |
443 | ||
444 | if (!s) | |
445 | goto fail_finish; | |
446 | ||
6eb5f6b9 JH |
447 | check_at = s; |
448 | ||
2c2d71f5 | 449 | /* Finish the diagnostic message */ |
30944b6d | 450 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) ); |
2c2d71f5 JH |
451 | |
452 | /* Got a candidate. Check MBOL anchoring, and the *other* substr. | |
453 | Start with the other substr. | |
454 | XXXX no SCREAM optimization yet - and a very coarse implementation | |
455 | XXXX /ttx+/ results in anchored=`ttx', floating=`x'. floating will | |
456 | *always* match. Probably should be marked during compile... | |
457 | Probably it is right to do no SCREAM here... | |
458 | */ | |
459 | ||
460 | if (prog->float_substr && prog->anchored_substr) { | |
30944b6d | 461 | /* Take into account the "other" substring. */ |
2c2d71f5 JH |
462 | /* XXXX May be hopelessly wrong for UTF... */ |
463 | if (!other_last) | |
6eb5f6b9 | 464 | other_last = strpos; |
2c2d71f5 | 465 | if (check == prog->float_substr) { |
30944b6d IZ |
466 | do_other_anchored: |
467 | { | |
2c2d71f5 JH |
468 | char *last = s - start_shift, *last1, *last2; |
469 | char *s1 = s; | |
470 | ||
471 | tmp = PL_bostr; | |
472 | t = s - prog->check_offset_max; | |
473 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ | |
474 | && (!(prog->reganch & ROPT_UTF8) | |
475 | || (PL_bostr = strpos, /* Used in regcopmaybe() */ | |
476 | (t = reghopmaybe_c(s, -(prog->check_offset_max))) | |
477 | && t > strpos))) | |
30944b6d | 478 | /* EMPTY */; |
2c2d71f5 JH |
479 | else |
480 | t = strpos; | |
481 | t += prog->anchored_offset; | |
6eb5f6b9 JH |
482 | if (t < other_last) /* These positions already checked */ |
483 | t = other_last; | |
2c2d71f5 JH |
484 | PL_bostr = tmp; |
485 | last2 = last1 = strend - prog->minlen; | |
486 | if (last < last1) | |
487 | last1 = last; | |
488 | /* XXXX It is not documented what units *_offsets are in. Assume bytes. */ | |
489 | /* On end-of-str: see comment below. */ | |
490 | s = fbm_instr((unsigned char*)t, | |
491 | (unsigned char*)last1 + prog->anchored_offset | |
492 | + SvCUR(prog->anchored_substr) | |
493 | - (SvTAIL(prog->anchored_substr)!=0), | |
494 | prog->anchored_substr, PL_multiline ? FBMrf_MULTILINE : 0); | |
495 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%s anchored substr `%s%.*s%s'%s", | |
496 | (s ? "Found" : "Contradicts"), | |
497 | PL_colors[0], | |
7b0972df JH |
498 | (int)(SvCUR(prog->anchored_substr) |
499 | - (SvTAIL(prog->anchored_substr)!=0)), | |
2c2d71f5 JH |
500 | SvPVX(prog->anchored_substr), |
501 | PL_colors[1], (SvTAIL(prog->anchored_substr) ? "$" : ""))); | |
502 | if (!s) { | |
503 | if (last1 >= last2) { | |
504 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
505 | ", giving up...\n")); | |
506 | goto fail_finish; | |
507 | } | |
508 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
509 | ", trying floating at offset %ld...\n", | |
30944b6d | 510 | (long)(s1 + 1 - i_strpos))); |
2c2d71f5 | 511 | PL_regeol = strend; /* Used in HOP() */ |
6eb5f6b9 | 512 | other_last = last1 + prog->anchored_offset + 1; |
2c2d71f5 JH |
513 | s = HOPc(last, 1); |
514 | goto restart; | |
515 | } | |
516 | else { | |
517 | DEBUG_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", | |
30944b6d | 518 | (long)(s - i_strpos))); |
2c2d71f5 | 519 | t = s - prog->anchored_offset; |
6eb5f6b9 | 520 | other_last = s + 1; |
30944b6d | 521 | s = s1; |
2c2d71f5 JH |
522 | if (t == strpos) |
523 | goto try_at_start; | |
2c2d71f5 JH |
524 | goto try_at_offset; |
525 | } | |
30944b6d | 526 | } |
2c2d71f5 JH |
527 | } |
528 | else { /* Take into account the floating substring. */ | |
529 | char *last, *last1; | |
530 | char *s1 = s; | |
531 | ||
532 | t = s - start_shift; | |
533 | last1 = last = strend - prog->minlen + prog->float_min_offset; | |
534 | if (last - t > prog->float_max_offset) | |
535 | last = t + prog->float_max_offset; | |
536 | s = t + prog->float_min_offset; | |
6eb5f6b9 JH |
537 | if (s < other_last) |
538 | s = other_last; | |
2c2d71f5 JH |
539 | /* XXXX It is not documented what units *_offsets are in. Assume bytes. */ |
540 | /* fbm_instr() takes into account exact value of end-of-str | |
541 | if the check is SvTAIL(ed). Since false positives are OK, | |
542 | and end-of-str is not later than strend we are OK. */ | |
543 | s = fbm_instr((unsigned char*)s, | |
544 | (unsigned char*)last + SvCUR(prog->float_substr) | |
545 | - (SvTAIL(prog->float_substr)!=0), | |
546 | prog->float_substr, PL_multiline ? FBMrf_MULTILINE : 0); | |
547 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%s floating substr `%s%.*s%s'%s", | |
548 | (s ? "Found" : "Contradicts"), | |
549 | PL_colors[0], | |
7b0972df JH |
550 | (int)(SvCUR(prog->float_substr) |
551 | - (SvTAIL(prog->float_substr)!=0)), | |
2c2d71f5 JH |
552 | SvPVX(prog->float_substr), |
553 | PL_colors[1], (SvTAIL(prog->float_substr) ? "$" : ""))); | |
554 | if (!s) { | |
555 | if (last1 == last) { | |
556 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
557 | ", giving up...\n")); | |
558 | goto fail_finish; | |
559 | } | |
560 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
561 | ", trying anchored starting at offset %ld...\n", | |
30944b6d | 562 | (long)(s1 + 1 - i_strpos))); |
6eb5f6b9 | 563 | other_last = last + 1; |
2c2d71f5 JH |
564 | PL_regeol = strend; /* Used in HOP() */ |
565 | s = HOPc(t, 1); | |
566 | goto restart; | |
567 | } | |
568 | else { | |
569 | DEBUG_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", | |
30944b6d | 570 | (long)(s - i_strpos))); |
6eb5f6b9 | 571 | other_last = s + 1; |
30944b6d | 572 | s = s1; |
2c2d71f5 JH |
573 | if (t == strpos) |
574 | goto try_at_start; | |
2c2d71f5 JH |
575 | goto try_at_offset; |
576 | } | |
577 | } | |
cad2e5aa | 578 | } |
2c2d71f5 JH |
579 | |
580 | t = s - prog->check_offset_max; | |
581 | tmp = PL_bostr; | |
582 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ | |
583 | && (!(prog->reganch & ROPT_UTF8) | |
584 | || (PL_bostr = strpos, /* Used in regcopmaybe() */ | |
585 | ((t = reghopmaybe_c(s, -(prog->check_offset_max))) | |
586 | && t > strpos)))) { | |
587 | PL_bostr = tmp; | |
588 | /* Fixed substring is found far enough so that the match | |
589 | cannot start at strpos. */ | |
590 | try_at_offset: | |
cad2e5aa | 591 | if (ml_anch && t[-1] != '\n') { |
30944b6d IZ |
592 | /* Eventually fbm_*() should handle this, but often |
593 | anchored_offset is not 0, so this check will not be wasted. */ | |
594 | /* XXXX In the code below we prefer to look for "^" even in | |
595 | presence of anchored substrings. And we search even | |
596 | beyond the found float position. These pessimizations | |
597 | are historical artefacts only. */ | |
598 | find_anchor: | |
2c2d71f5 | 599 | while (t < strend - prog->minlen) { |
cad2e5aa JH |
600 | if (*t == '\n') { |
601 | if (t < s - prog->check_offset_min) { | |
30944b6d IZ |
602 | if (prog->anchored_substr) { |
603 | /* We definitely contradict the found anchored | |
604 | substr. Due to the above check we do not | |
605 | contradict "check" substr. | |
606 | Thus we can arrive here only if check substr | |
607 | is float. Redo checking for "other"=="fixed". | |
608 | */ | |
609 | strpos = t + 1; | |
610 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n", | |
611 | PL_colors[0],PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset))); | |
612 | goto do_other_anchored; | |
613 | } | |
cad2e5aa | 614 | s = t + 1; |
2c2d71f5 | 615 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n", |
30944b6d | 616 | PL_colors[0],PL_colors[1], (long)(s - i_strpos))); |
cad2e5aa JH |
617 | goto set_useful; |
618 | } | |
2c2d71f5 | 619 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting at offset %ld...\n", |
30944b6d IZ |
620 | PL_colors[0],PL_colors[1], (long)(t + 1 - i_strpos))); |
621 | strpos = s = t + 1; | |
cad2e5aa JH |
622 | goto restart; |
623 | } | |
624 | t++; | |
625 | } | |
2c2d71f5 JH |
626 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n", |
627 | PL_colors[0],PL_colors[1])); | |
628 | goto fail_finish; | |
cad2e5aa JH |
629 | } |
630 | s = t; | |
631 | set_useful: | |
2c2d71f5 | 632 | ++BmUSEFUL(prog->check_substr); /* hooray/5 */ |
cad2e5aa JH |
633 | } |
634 | else { | |
2c2d71f5 JH |
635 | PL_bostr = tmp; |
636 | /* The found string does not prohibit matching at beg-of-str | |
637 | - no optimization of calling REx engine can be performed, | |
638 | unless it was an MBOL and we are not after MBOL. */ | |
639 | try_at_start: | |
640 | /* Even in this situation we may use MBOL flag if strpos is offset | |
641 | wrt the start of the string. */ | |
642 | if (ml_anch && sv | |
cad2e5aa JH |
643 | && (strpos + SvCUR(sv) != strend) && strpos[-1] != '\n') { |
644 | t = strpos; | |
645 | goto find_anchor; | |
646 | } | |
30944b6d IZ |
647 | DEBUG_r( if (ml_anch) |
648 | PerlIO_printf(Perl_debug_log, "Does not contradict /%s^%s/m...\n", | |
649 | PL_colors[0],PL_colors[1]); | |
650 | ); | |
2c2d71f5 | 651 | success_at_start: |
30944b6d | 652 | if (!(prog->reganch & ROPT_NAUGHTY) /* XXXX If strpos moved? */ |
cad2e5aa JH |
653 | && --BmUSEFUL(prog->check_substr) < 0 |
654 | && prog->check_substr == prog->float_substr) { /* boo */ | |
655 | /* If flags & SOMETHING - do not do it many times on the same match */ | |
656 | SvREFCNT_dec(prog->check_substr); | |
657 | prog->check_substr = Nullsv; /* disable */ | |
658 | prog->float_substr = Nullsv; /* clear */ | |
659 | s = strpos; | |
3cf5c195 IZ |
660 | /* XXXX This is a remnant of the old implementation. It |
661 | looks wasteful, since now INTUIT can use many | |
6eb5f6b9 | 662 | other heuristics. */ |
cad2e5aa JH |
663 | prog->reganch &= ~RE_USE_INTUIT; |
664 | } | |
665 | else | |
666 | s = strpos; | |
667 | } | |
668 | ||
6eb5f6b9 JH |
669 | /* Last resort... */ |
670 | /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */ | |
671 | if (prog->regstclass) { | |
672 | /* minlen == 0 is possible if regstclass is \b or \B, | |
673 | and the fixed substr is ''$. | |
674 | Since minlen is already taken into account, s+1 is before strend; | |
675 | accidentally, minlen >= 1 guaranties no false positives at s + 1 | |
676 | even for \b or \B. But (minlen? 1 : 0) below assumes that | |
677 | regstclass does not come from lookahead... */ | |
678 | /* If regstclass takes bytelength more than 1: If charlength==1, OK. | |
679 | This leaves EXACTF only, which is dealt with in find_byclass(). */ | |
680 | char *endpos = (prog->anchored_substr || ml_anch) | |
681 | ? s + (prog->minlen? 1 : 0) | |
682 | : (prog->float_substr ? check_at - start_shift + 1 | |
683 | : strend) ; | |
684 | char *startpos = sv ? strend - SvCUR(sv) : s; | |
685 | ||
686 | t = s; | |
687 | s = find_byclass(prog, prog->regstclass, s, endpos, startpos, 1); | |
688 | if (!s) { | |
689 | #ifdef DEBUGGING | |
690 | char *what; | |
691 | #endif | |
692 | if (endpos == strend) { | |
693 | DEBUG_r( PerlIO_printf(Perl_debug_log, | |
694 | "Could not match STCLASS...\n") ); | |
695 | goto fail; | |
696 | } | |
697 | /* Contradict one of substrings */ | |
698 | if (prog->anchored_substr) { | |
699 | DEBUG_r( PerlIO_printf(Perl_debug_log, | |
700 | "This position contradicts STCLASS...\n") ); | |
701 | if (prog->anchored_substr == check) { | |
702 | DEBUG_r( what = "anchored" ); | |
703 | hop_and_restart: | |
704 | PL_regeol = strend; /* Used in HOP() */ | |
705 | s = HOPc(t, 1); | |
706 | DEBUG_r( PerlIO_printf(Perl_debug_log, | |
707 | "trying %s substr starting at offset %ld...\n", | |
708 | what, (long)(s + start_shift - i_strpos)) ); | |
709 | goto restart; | |
710 | } | |
711 | /* Have both, check is floating */ | |
712 | if (t + start_shift >= check_at) /* Contradicts floating=check */ | |
713 | goto retry_floating_check; | |
714 | /* Recheck anchored substring, but not floating... */ | |
715 | s = check_at; | |
716 | DEBUG_r( PerlIO_printf(Perl_debug_log, | |
717 | "trying anchored substr starting at offset %ld...\n", | |
718 | (long)(other_last - i_strpos)) ); | |
719 | goto do_other_anchored; | |
720 | } | |
721 | /* Check is floating subtring. */ | |
722 | retry_floating_check: | |
723 | t = check_at - start_shift; | |
724 | DEBUG_r( what = "floating" ); | |
725 | goto hop_and_restart; | |
726 | } | |
727 | DEBUG_r( if (t != s) | |
728 | PerlIO_printf(Perl_debug_log, | |
729 | "By STCLASS: moving %ld --> %ld\n", | |
730 | (long)(t - i_strpos), (long)(s - i_strpos)); | |
731 | else | |
732 | PerlIO_printf(Perl_debug_log, | |
733 | "Does not contradict STCLASS...\n") ); | |
734 | } | |
2c2d71f5 | 735 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%sGuessed:%s match at offset %ld\n", |
30944b6d | 736 | PL_colors[4], PL_colors[5], (long)(s - i_strpos)) ); |
cad2e5aa | 737 | return s; |
2c2d71f5 JH |
738 | |
739 | fail_finish: /* Substring not found */ | |
740 | BmUSEFUL(prog->check_substr) += 5; /* hooray */ | |
cad2e5aa | 741 | fail: |
2c2d71f5 | 742 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n", |
cad2e5aa JH |
743 | PL_colors[4],PL_colors[5])); |
744 | return Nullch; | |
745 | } | |
9661b544 | 746 | |
6eb5f6b9 | 747 | /* We know what class REx starts with. Try to find this position... */ |
3c3eec57 GS |
748 | STATIC char * |
749 | S_find_byclass(pTHX_ regexp * prog, regnode *c, char *s, char *strend, char *startpos, I32 norun) | |
a687059c | 750 | { |
6eb5f6b9 JH |
751 | I32 doevery = (prog->reganch & ROPT_SKIP) == 0; |
752 | char *m; | |
753 | int ln; | |
754 | int c1; | |
755 | int c2; | |
756 | char *e; | |
757 | register I32 tmp = 1; /* Scratch variable? */ | |
cad2e5aa | 758 | |
6eb5f6b9 JH |
759 | /* We know what class it must start with. */ |
760 | switch (OP(c)) { | |
761 | case ANYOFUTF8: | |
762 | while (s < strend) { | |
763 | if (REGINCLASSUTF8(c, (U8*)s)) { | |
764 | if (tmp && (norun || regtry(prog, s))) | |
a0d0e21e | 765 | goto got_it; |
3cf5c195 | 766 | else |
6eb5f6b9 | 767 | tmp = doevery; |
a0ed51b3 | 768 | } |
6eb5f6b9 JH |
769 | else |
770 | tmp = 1; | |
a0ed51b3 LW |
771 | s += UTF8SKIP(s); |
772 | } | |
6eb5f6b9 JH |
773 | break; |
774 | case ANYOF: | |
a0ed51b3 | 775 | while (s < strend) { |
6eb5f6b9 JH |
776 | if (REGINCLASS(c, *s)) { |
777 | if (tmp && (norun || regtry(prog, s))) | |
778 | goto got_it; | |
779 | else | |
780 | tmp = doevery; | |
a0ed51b3 | 781 | } |
6eb5f6b9 JH |
782 | else |
783 | tmp = 1; | |
a0ed51b3 | 784 | s++; |
a0d0e21e | 785 | } |
6eb5f6b9 JH |
786 | break; |
787 | case EXACTF: | |
788 | m = STRING(c); | |
789 | ln = STR_LEN(c); | |
790 | c1 = *m; | |
791 | c2 = PL_fold[c1]; | |
792 | goto do_exactf; | |
793 | case EXACTFL: | |
794 | m = STRING(c); | |
795 | ln = STR_LEN(c); | |
796 | c1 = *m; | |
797 | c2 = PL_fold_locale[c1]; | |
798 | do_exactf: | |
799 | e = strend - ln; | |
b3c9acc1 | 800 | |
6eb5f6b9 JH |
801 | if (norun && e < s) |
802 | e = s; /* Due to minlen logic of intuit() */ | |
b3c9acc1 IZ |
803 | /* Here it is NOT UTF! */ |
804 | if (c1 == c2) { | |
805 | while (s <= e) { | |
806 | if ( *s == c1 | |
807 | && (ln == 1 || (OP(c) == EXACTF | |
808 | ? ibcmp(s, m, ln) | |
809 | : ibcmp_locale(s, m, ln))) | |
6eb5f6b9 | 810 | && (norun || regtry(prog, s)) ) |
b3c9acc1 IZ |
811 | goto got_it; |
812 | s++; | |
813 | } | |
814 | } else { | |
815 | while (s <= e) { | |
816 | if ( (*s == c1 || *s == c2) | |
817 | && (ln == 1 || (OP(c) == EXACTF | |
818 | ? ibcmp(s, m, ln) | |
819 | : ibcmp_locale(s, m, ln))) | |
6eb5f6b9 | 820 | && (norun || regtry(prog, s)) ) |
b3c9acc1 IZ |
821 | goto got_it; |
822 | s++; | |
823 | } | |
824 | } | |
825 | break; | |
bbce6d69 | 826 | case BOUNDL: |
3280af22 | 827 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 828 | /* FALL THROUGH */ |
a0d0e21e | 829 | case BOUND: |
6eb5f6b9 | 830 | tmp = (s != startpos) ? UCHARAT(s - 1) : '\n'; |
95bac841 | 831 | tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0); |
a0d0e21e | 832 | while (s < strend) { |
95bac841 | 833 | if (tmp == !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) { |
a0d0e21e | 834 | tmp = !tmp; |
6eb5f6b9 | 835 | if ((norun || regtry(prog, s))) |
a0d0e21e | 836 | goto got_it; |
a687059c | 837 | } |
a0d0e21e LW |
838 | s++; |
839 | } | |
6eb5f6b9 | 840 | if ((!prog->minlen && tmp) && (norun || regtry(prog, s))) |
a0d0e21e LW |
841 | goto got_it; |
842 | break; | |
a0ed51b3 LW |
843 | case BOUNDLUTF8: |
844 | PL_reg_flags |= RF_tainted; | |
845 | /* FALL THROUGH */ | |
846 | case BOUNDUTF8: | |
6eb5f6b9 | 847 | tmp = (I32)(s != startpos) ? utf8_to_uv(reghop((U8*)s, -1), 0) : '\n'; |
a0ed51b3 LW |
848 | tmp = ((OP(c) == BOUND ? isALNUM_uni(tmp) : isALNUM_LC_uni(tmp)) != 0); |
849 | while (s < strend) { | |
dfe13c55 GS |
850 | if (tmp == !(OP(c) == BOUND ? |
851 | swash_fetch(PL_utf8_alnum, (U8*)s) : | |
852 | isALNUM_LC_utf8((U8*)s))) | |
853 | { | |
a0ed51b3 | 854 | tmp = !tmp; |
6eb5f6b9 | 855 | if ((norun || regtry(prog, s))) |
a0ed51b3 LW |
856 | goto got_it; |
857 | } | |
858 | s += UTF8SKIP(s); | |
859 | } | |
6eb5f6b9 | 860 | if ((!prog->minlen && tmp) && (norun || regtry(prog, s))) |
a0ed51b3 LW |
861 | goto got_it; |
862 | break; | |
bbce6d69 | 863 | case NBOUNDL: |
3280af22 | 864 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 865 | /* FALL THROUGH */ |
a0d0e21e | 866 | case NBOUND: |
6eb5f6b9 | 867 | tmp = (s != startpos) ? UCHARAT(s - 1) : '\n'; |
95bac841 | 868 | tmp = ((OP(c) == NBOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0); |
a0d0e21e | 869 | while (s < strend) { |
95bac841 | 870 | if (tmp == !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s))) |
a0d0e21e | 871 | tmp = !tmp; |
6eb5f6b9 | 872 | else if ((norun || regtry(prog, s))) |
a0d0e21e LW |
873 | goto got_it; |
874 | s++; | |
875 | } | |
6eb5f6b9 | 876 | if ((!prog->minlen && !tmp) && (norun || regtry(prog, s))) |
a0d0e21e LW |
877 | goto got_it; |
878 | break; | |
a0ed51b3 LW |
879 | case NBOUNDLUTF8: |
880 | PL_reg_flags |= RF_tainted; | |
881 | /* FALL THROUGH */ | |
882 | case NBOUNDUTF8: | |
6eb5f6b9 | 883 | if (prog->minlen) |
dfe13c55 | 884 | strend = reghop_c(strend, -1); |
6eb5f6b9 | 885 | tmp = (I32)(s != startpos) ? utf8_to_uv(reghop((U8*)s, -1), 0) : '\n'; |
a0ed51b3 LW |
886 | tmp = ((OP(c) == NBOUND ? isALNUM_uni(tmp) : isALNUM_LC_uni(tmp)) != 0); |
887 | while (s < strend) { | |
dfe13c55 GS |
888 | if (tmp == !(OP(c) == NBOUND ? |
889 | swash_fetch(PL_utf8_alnum, (U8*)s) : | |
890 | isALNUM_LC_utf8((U8*)s))) | |
a0ed51b3 | 891 | tmp = !tmp; |
6eb5f6b9 | 892 | else if ((norun || regtry(prog, s))) |
a0ed51b3 LW |
893 | goto got_it; |
894 | s += UTF8SKIP(s); | |
895 | } | |
6eb5f6b9 | 896 | if ((!prog->minlen && !tmp) && (norun || regtry(prog, s))) |
a0ed51b3 LW |
897 | goto got_it; |
898 | break; | |
a0d0e21e LW |
899 | case ALNUM: |
900 | while (s < strend) { | |
bbce6d69 | 901 | if (isALNUM(*s)) { |
6eb5f6b9 | 902 | if (tmp && (norun || regtry(prog, s))) |
bbce6d69 | 903 | goto got_it; |
904 | else | |
905 | tmp = doevery; | |
906 | } | |
907 | else | |
908 | tmp = 1; | |
909 | s++; | |
910 | } | |
911 | break; | |
a0ed51b3 LW |
912 | case ALNUMUTF8: |
913 | while (s < strend) { | |
dfe13c55 | 914 | if (swash_fetch(PL_utf8_alnum, (U8*)s)) { |
6eb5f6b9 | 915 | if (tmp && (norun || regtry(prog, s))) |
a0ed51b3 LW |
916 | goto got_it; |
917 | else | |
918 | tmp = doevery; | |
919 | } | |
920 | else | |
921 | tmp = 1; | |
922 | s += UTF8SKIP(s); | |
923 | } | |
924 | break; | |
bbce6d69 | 925 | case ALNUML: |
3280af22 | 926 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 927 | while (s < strend) { |
928 | if (isALNUM_LC(*s)) { | |
6eb5f6b9 | 929 | if (tmp && (norun || regtry(prog, s))) |
a0d0e21e | 930 | goto got_it; |
a687059c | 931 | else |
a0d0e21e LW |
932 | tmp = doevery; |
933 | } | |
934 | else | |
935 | tmp = 1; | |
936 | s++; | |
937 | } | |
938 | break; | |
a0ed51b3 LW |
939 | case ALNUMLUTF8: |
940 | PL_reg_flags |= RF_tainted; | |
941 | while (s < strend) { | |
dfe13c55 | 942 | if (isALNUM_LC_utf8((U8*)s)) { |
6eb5f6b9 | 943 | if (tmp && (norun || regtry(prog, s))) |
a0ed51b3 LW |
944 | goto got_it; |
945 | else | |
946 | tmp = doevery; | |
947 | } | |
948 | else | |
949 | tmp = 1; | |
950 | s += UTF8SKIP(s); | |
951 | } | |
952 | break; | |
a0d0e21e LW |
953 | case NALNUM: |
954 | while (s < strend) { | |
bbce6d69 | 955 | if (!isALNUM(*s)) { |
6eb5f6b9 | 956 | if (tmp && (norun || regtry(prog, s))) |
bbce6d69 | 957 | goto got_it; |
958 | else | |
959 | tmp = doevery; | |
960 | } | |
961 | else | |
962 | tmp = 1; | |
963 | s++; | |
964 | } | |
965 | break; | |
a0ed51b3 LW |
966 | case NALNUMUTF8: |
967 | while (s < strend) { | |
dfe13c55 | 968 | if (!swash_fetch(PL_utf8_alnum, (U8*)s)) { |
6eb5f6b9 | 969 | if (tmp && (norun || regtry(prog, s))) |
a0ed51b3 LW |
970 | goto got_it; |
971 | else | |
972 | tmp = doevery; | |
973 | } | |
974 | else | |
975 | tmp = 1; | |
976 | s += UTF8SKIP(s); | |
977 | } | |
978 | break; | |
bbce6d69 | 979 | case NALNUML: |
3280af22 | 980 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 981 | while (s < strend) { |
982 | if (!isALNUM_LC(*s)) { | |
6eb5f6b9 | 983 | if (tmp && (norun || regtry(prog, s))) |
a0d0e21e | 984 | goto got_it; |
a687059c | 985 | else |
a0d0e21e | 986 | tmp = doevery; |
a687059c | 987 | } |
a0d0e21e LW |
988 | else |
989 | tmp = 1; | |
990 | s++; | |
991 | } | |
992 | break; | |
a0ed51b3 LW |
993 | case NALNUMLUTF8: |
994 | PL_reg_flags |= RF_tainted; | |
995 | while (s < strend) { | |
dfe13c55 | 996 | if (!isALNUM_LC_utf8((U8*)s)) { |
6eb5f6b9 | 997 | if (tmp && (norun || regtry(prog, s))) |
a0ed51b3 LW |
998 | goto got_it; |
999 | else | |
1000 | tmp = doevery; | |
1001 | } | |
1002 | else | |
1003 | tmp = 1; | |
1004 | s += UTF8SKIP(s); | |
1005 | } | |
1006 | break; | |
a0d0e21e LW |
1007 | case SPACE: |
1008 | while (s < strend) { | |
1009 | if (isSPACE(*s)) { | |
6eb5f6b9 | 1010 | if (tmp && (norun || regtry(prog, s))) |
a0d0e21e LW |
1011 | goto got_it; |
1012 | else | |
1013 | tmp = doevery; | |
2304df62 | 1014 | } |
a0d0e21e LW |
1015 | else |
1016 | tmp = 1; | |
1017 | s++; | |
1018 | } | |
1019 | break; | |
a0ed51b3 LW |
1020 | case SPACEUTF8: |
1021 | while (s < strend) { | |
dfe13c55 | 1022 | if (*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s)) { |
6eb5f6b9 | 1023 | if (tmp && (norun || regtry(prog, s))) |
a0ed51b3 LW |
1024 | goto got_it; |
1025 | else | |
1026 | tmp = doevery; | |
1027 | } | |
1028 | else | |
1029 | tmp = 1; | |
1030 | s += UTF8SKIP(s); | |
1031 | } | |
1032 | break; | |
bbce6d69 | 1033 | case SPACEL: |
3280af22 | 1034 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 1035 | while (s < strend) { |
1036 | if (isSPACE_LC(*s)) { | |
6eb5f6b9 | 1037 | if (tmp && (norun || regtry(prog, s))) |
bbce6d69 | 1038 | goto got_it; |
1039 | else | |
1040 | tmp = doevery; | |
1041 | } | |
1042 | else | |
1043 | tmp = 1; | |
1044 | s++; | |
1045 | } | |
1046 | break; | |
a0ed51b3 LW |
1047 | case SPACELUTF8: |
1048 | PL_reg_flags |= RF_tainted; | |
1049 | while (s < strend) { | |
dfe13c55 | 1050 | if (*s == ' ' || isSPACE_LC_utf8((U8*)s)) { |
6eb5f6b9 | 1051 | if (tmp && (norun || regtry(prog, s))) |
a0ed51b3 LW |
1052 | goto got_it; |
1053 | else | |
1054 | tmp = doevery; | |
1055 | } | |
1056 | else | |
1057 | tmp = 1; | |
1058 | s += UTF8SKIP(s); | |
1059 | } | |
1060 | break; | |
a0d0e21e LW |
1061 | case NSPACE: |
1062 | while (s < strend) { | |
1063 | if (!isSPACE(*s)) { | |
6eb5f6b9 | 1064 | if (tmp && (norun || regtry(prog, s))) |
a0d0e21e LW |
1065 | goto got_it; |
1066 | else | |
1067 | tmp = doevery; | |
a687059c | 1068 | } |
a0d0e21e LW |
1069 | else |
1070 | tmp = 1; | |
1071 | s++; | |
1072 | } | |
1073 | break; | |
a0ed51b3 LW |
1074 | case NSPACEUTF8: |
1075 | while (s < strend) { | |
dfe13c55 | 1076 | if (!(*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s))) { |
6eb5f6b9 | 1077 | if (tmp && (norun || regtry(prog, s))) |
a0ed51b3 LW |
1078 | goto got_it; |
1079 | else | |
1080 | tmp = doevery; | |
1081 | } | |
1082 | else | |
1083 | tmp = 1; | |
1084 | s += UTF8SKIP(s); | |
1085 | } | |
1086 | break; | |
bbce6d69 | 1087 | case NSPACEL: |
3280af22 | 1088 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 1089 | while (s < strend) { |
1090 | if (!isSPACE_LC(*s)) { | |
6eb5f6b9 | 1091 | if (tmp && (norun || regtry(prog, s))) |
bbce6d69 | 1092 | goto got_it; |
1093 | else | |
1094 | tmp = doevery; | |
1095 | } | |
1096 | else | |
1097 | tmp = 1; | |
1098 | s++; | |
1099 | } | |
1100 | break; | |
a0ed51b3 LW |
1101 | case NSPACELUTF8: |
1102 | PL_reg_flags |= RF_tainted; | |
1103 | while (s < strend) { | |
dfe13c55 | 1104 | if (!(*s == ' ' || isSPACE_LC_utf8((U8*)s))) { |
6eb5f6b9 | 1105 | if (tmp && (norun || regtry(prog, s))) |
a0ed51b3 LW |
1106 | goto got_it; |
1107 | else | |
1108 | tmp = doevery; | |
1109 | } | |
1110 | else | |
1111 | tmp = 1; | |
1112 | s += UTF8SKIP(s); | |
1113 | } | |
1114 | break; | |
a0d0e21e LW |
1115 | case DIGIT: |
1116 | while (s < strend) { | |
1117 | if (isDIGIT(*s)) { | |
6eb5f6b9 | 1118 | if (tmp && (norun || regtry(prog, s))) |
a0d0e21e LW |
1119 | goto got_it; |
1120 | else | |
1121 | tmp = doevery; | |
2b69d0c2 | 1122 | } |
a0d0e21e LW |
1123 | else |
1124 | tmp = 1; | |
1125 | s++; | |
1126 | } | |
1127 | break; | |
a0ed51b3 LW |
1128 | case DIGITUTF8: |
1129 | while (s < strend) { | |
dfe13c55 | 1130 | if (swash_fetch(PL_utf8_digit,(U8*)s)) { |
6eb5f6b9 | 1131 | if (tmp && (norun || regtry(prog, s))) |
a0ed51b3 LW |
1132 | goto got_it; |
1133 | else | |
1134 | tmp = doevery; | |
1135 | } | |
1136 | else | |
1137 | tmp = 1; | |
1138 | s += UTF8SKIP(s); | |
1139 | } | |
1140 | break; | |
b8c5462f JH |
1141 | case DIGITL: |
1142 | PL_reg_flags |= RF_tainted; | |
1143 | while (s < strend) { | |
1144 | if (isDIGIT_LC(*s)) { | |
6eb5f6b9 | 1145 | if (tmp && (norun || regtry(prog, s))) |
b8c5462f JH |
1146 | goto got_it; |
1147 | else | |
1148 | tmp = doevery; | |
1149 | } | |
1150 | else | |
1151 | tmp = 1; | |
1152 | s++; | |
1153 | } | |
1154 | break; | |
1155 | case DIGITLUTF8: | |
1156 | PL_reg_flags |= RF_tainted; | |
1157 | while (s < strend) { | |
1158 | if (isDIGIT_LC_utf8((U8*)s)) { | |
6eb5f6b9 | 1159 | if (tmp && (norun || regtry(prog, s))) |
b8c5462f JH |
1160 | goto got_it; |
1161 | else | |
1162 | tmp = doevery; | |
1163 | } | |
1164 | else | |
1165 | tmp = 1; | |
1166 | s += UTF8SKIP(s); | |
1167 | } | |
1168 | break; | |
a0d0e21e LW |
1169 | case NDIGIT: |
1170 | while (s < strend) { | |
1171 | if (!isDIGIT(*s)) { | |
6eb5f6b9 | 1172 | if (tmp && (norun || regtry(prog, s))) |
a0d0e21e LW |
1173 | goto got_it; |
1174 | else | |
1175 | tmp = doevery; | |
a687059c | 1176 | } |
a0d0e21e LW |
1177 | else |
1178 | tmp = 1; | |
1179 | s++; | |
1180 | } | |
1181 | break; | |
a0ed51b3 LW |
1182 | case NDIGITUTF8: |
1183 | while (s < strend) { | |
dfe13c55 | 1184 | if (!swash_fetch(PL_utf8_digit,(U8*)s)) { |
6eb5f6b9 | 1185 | if (tmp && (norun || regtry(prog, s))) |
a0ed51b3 LW |
1186 | goto got_it; |
1187 | else | |
1188 | tmp = doevery; | |
1189 | } | |
1190 | else | |
1191 | tmp = 1; | |
1192 | s += UTF8SKIP(s); | |
1193 | } | |
1194 | break; | |
b8c5462f JH |
1195 | case NDIGITL: |
1196 | PL_reg_flags |= RF_tainted; | |
1197 | while (s < strend) { | |
1198 | if (!isDIGIT_LC(*s)) { | |
6eb5f6b9 | 1199 | if (tmp && (norun || regtry(prog, s))) |
b8c5462f JH |
1200 | goto got_it; |
1201 | else | |
1202 | tmp = doevery; | |
1203 | } | |
1204 | else | |
1205 | tmp = 1; | |
1206 | s++; | |
a0ed51b3 | 1207 | } |
b8c5462f JH |
1208 | break; |
1209 | case NDIGITLUTF8: | |
1210 | PL_reg_flags |= RF_tainted; | |
1211 | while (s < strend) { | |
1212 | if (!isDIGIT_LC_utf8((U8*)s)) { | |
6eb5f6b9 | 1213 | if (tmp && (norun || regtry(prog, s))) |
b8c5462f | 1214 | goto got_it; |
cf93c79d | 1215 | else |
b8c5462f JH |
1216 | tmp = doevery; |
1217 | } | |
1218 | else | |
1219 | tmp = 1; | |
1220 | s += UTF8SKIP(s); | |
1221 | } | |
1222 | break; | |
b3c9acc1 | 1223 | default: |
3c3eec57 GS |
1224 | Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c)); |
1225 | break; | |
d6a28714 | 1226 | } |
6eb5f6b9 JH |
1227 | return 0; |
1228 | got_it: | |
1229 | return s; | |
1230 | } | |
1231 | ||
1232 | /* | |
1233 | - regexec_flags - match a regexp against a string | |
1234 | */ | |
1235 | I32 | |
1236 | Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char *strend, | |
1237 | char *strbeg, I32 minend, SV *sv, void *data, U32 flags) | |
1238 | /* strend: pointer to null at end of string */ | |
1239 | /* strbeg: real beginning of string */ | |
1240 | /* minend: end of match must be >=minend after stringarg. */ | |
1241 | /* data: May be used for some additional optimizations. */ | |
1242 | /* nosave: For optimizations. */ | |
1243 | { | |
1244 | dTHR; | |
1245 | register char *s; | |
1246 | register regnode *c; | |
1247 | register char *startpos = stringarg; | |
1248 | register I32 tmp; | |
1249 | I32 minlen; /* must match at least this many chars */ | |
1250 | I32 dontbother = 0; /* how many characters not to try at end */ | |
1251 | I32 start_shift = 0; /* Offset of the start to find | |
1252 | constant substr. */ /* CC */ | |
1253 | I32 end_shift = 0; /* Same for the end. */ /* CC */ | |
1254 | I32 scream_pos = -1; /* Internal iterator of scream. */ | |
1255 | char *scream_olds; | |
1256 | SV* oreplsv = GvSV(PL_replgv); | |
1257 | ||
1258 | PL_regcc = 0; | |
1259 | ||
1260 | cache_re(prog); | |
1261 | #ifdef DEBUGGING | |
1262 | PL_regnarrate = PL_debug & 512; | |
1263 | #endif | |
1264 | ||
1265 | /* Be paranoid... */ | |
1266 | if (prog == NULL || startpos == NULL) { | |
1267 | Perl_croak(aTHX_ "NULL regexp parameter"); | |
1268 | return 0; | |
1269 | } | |
1270 | ||
1271 | minlen = prog->minlen; | |
1272 | if (strend - startpos < minlen) goto phooey; | |
1273 | ||
1274 | if (startpos == strbeg) /* is ^ valid at stringarg? */ | |
1275 | PL_regprev = '\n'; | |
1276 | else { | |
1277 | PL_regprev = (U32)stringarg[-1]; | |
1278 | if (!PL_multiline && PL_regprev == '\n') | |
1279 | PL_regprev = '\0'; /* force ^ to NOT match */ | |
1280 | } | |
1281 | ||
1282 | /* Check validity of program. */ | |
1283 | if (UCHARAT(prog->program) != REG_MAGIC) { | |
1284 | Perl_croak(aTHX_ "corrupted regexp program"); | |
1285 | } | |
1286 | ||
1287 | PL_reg_flags = 0; | |
1288 | PL_reg_eval_set = 0; | |
1289 | PL_reg_maxiter = 0; | |
1290 | ||
1291 | if (prog->reganch & ROPT_UTF8) | |
1292 | PL_reg_flags |= RF_utf8; | |
1293 | ||
1294 | /* Mark beginning of line for ^ and lookbehind. */ | |
1295 | PL_regbol = startpos; | |
1296 | PL_bostr = strbeg; | |
1297 | PL_reg_sv = sv; | |
1298 | ||
1299 | /* Mark end of line for $ (and such) */ | |
1300 | PL_regeol = strend; | |
1301 | ||
1302 | /* see how far we have to get to not match where we matched before */ | |
1303 | PL_regtill = startpos+minend; | |
1304 | ||
1305 | /* We start without call_cc context. */ | |
1306 | PL_reg_call_cc = 0; | |
1307 | ||
1308 | /* If there is a "must appear" string, look for it. */ | |
1309 | s = startpos; | |
1310 | ||
1311 | if (prog->reganch & ROPT_GPOS_SEEN) { /* Need to have PL_reg_ganch */ | |
1312 | MAGIC *mg; | |
1313 | ||
1314 | if (flags & REXEC_IGNOREPOS) /* Means: check only at start */ | |
1315 | PL_reg_ganch = startpos; | |
1316 | else if (sv && SvTYPE(sv) >= SVt_PVMG | |
1317 | && SvMAGIC(sv) | |
1318 | && (mg = mg_find(sv, 'g')) && mg->mg_len >= 0) { | |
1319 | PL_reg_ganch = strbeg + mg->mg_len; /* Defined pos() */ | |
1320 | if (prog->reganch & ROPT_ANCH_GPOS) { | |
1321 | if (s > PL_reg_ganch) | |
1322 | goto phooey; | |
1323 | s = PL_reg_ganch; | |
1324 | } | |
1325 | } | |
1326 | else /* pos() not defined */ | |
1327 | PL_reg_ganch = strbeg; | |
1328 | } | |
1329 | ||
1330 | if (!(flags & REXEC_CHECKED) && prog->check_substr != Nullsv) { | |
1331 | re_scream_pos_data d; | |
1332 | ||
1333 | d.scream_olds = &scream_olds; | |
1334 | d.scream_pos = &scream_pos; | |
1335 | s = re_intuit_start(prog, sv, s, strend, flags, &d); | |
1336 | if (!s) | |
1337 | goto phooey; /* not present */ | |
1338 | } | |
1339 | ||
1340 | DEBUG_r( if (!PL_colorset) reginitcolors() ); | |
1341 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
1342 | "%sMatching REx%s `%s%.60s%s%s' against `%s%.*s%s%s'\n", | |
1343 | PL_colors[4],PL_colors[5],PL_colors[0], | |
1344 | prog->precomp, | |
1345 | PL_colors[1], | |
1346 | (strlen(prog->precomp) > 60 ? "..." : ""), | |
1347 | PL_colors[0], | |
1348 | (int)(strend - startpos > 60 ? 60 : strend - startpos), | |
1349 | startpos, PL_colors[1], | |
1350 | (strend - startpos > 60 ? "..." : "")) | |
1351 | ); | |
1352 | ||
1353 | /* Simplest case: anchored match need be tried only once. */ | |
1354 | /* [unless only anchor is BOL and multiline is set] */ | |
1355 | if (prog->reganch & (ROPT_ANCH & ~ROPT_ANCH_GPOS)) { | |
1356 | if (s == startpos && regtry(prog, startpos)) | |
1357 | goto got_it; | |
1358 | else if (PL_multiline || (prog->reganch & ROPT_IMPLICIT) | |
1359 | || (prog->reganch & ROPT_ANCH_MBOL)) /* XXXX SBOL? */ | |
1360 | { | |
1361 | char *end; | |
1362 | ||
1363 | if (minlen) | |
1364 | dontbother = minlen - 1; | |
1365 | end = HOPc(strend, -dontbother) - 1; | |
1366 | /* for multiline we only have to try after newlines */ | |
1367 | if (prog->check_substr) { | |
1368 | if (s == startpos) | |
1369 | goto after_try; | |
1370 | while (1) { | |
1371 | if (regtry(prog, s)) | |
1372 | goto got_it; | |
1373 | after_try: | |
1374 | if (s >= end) | |
1375 | goto phooey; | |
1376 | if (prog->reganch & RE_USE_INTUIT) { | |
1377 | s = re_intuit_start(prog, sv, s + 1, strend, flags, NULL); | |
1378 | if (!s) | |
1379 | goto phooey; | |
1380 | } | |
1381 | else | |
1382 | s++; | |
1383 | } | |
1384 | } else { | |
1385 | if (s > startpos) | |
1386 | s--; | |
1387 | while (s < end) { | |
1388 | if (*s++ == '\n') { /* don't need PL_utf8skip here */ | |
1389 | if (regtry(prog, s)) | |
1390 | goto got_it; | |
1391 | } | |
1392 | } | |
1393 | } | |
1394 | } | |
1395 | goto phooey; | |
1396 | } else if (prog->reganch & ROPT_ANCH_GPOS) { | |
1397 | if (regtry(prog, PL_reg_ganch)) | |
1398 | goto got_it; | |
1399 | goto phooey; | |
1400 | } | |
1401 | ||
1402 | /* Messy cases: unanchored match. */ | |
1403 | if (prog->anchored_substr && prog->reganch & ROPT_SKIP) { | |
1404 | /* we have /x+whatever/ */ | |
1405 | /* it must be a one character string (XXXX Except UTF?) */ | |
1406 | char ch = SvPVX(prog->anchored_substr)[0]; | |
1407 | if (UTF) { | |
1408 | while (s < strend) { | |
1409 | if (*s == ch) { | |
1410 | if (regtry(prog, s)) goto got_it; | |
1411 | s += UTF8SKIP(s); | |
1412 | while (s < strend && *s == ch) | |
1413 | s += UTF8SKIP(s); | |
1414 | } | |
1415 | s += UTF8SKIP(s); | |
1416 | } | |
1417 | } | |
1418 | else { | |
1419 | while (s < strend) { | |
1420 | if (*s == ch) { | |
1421 | if (regtry(prog, s)) goto got_it; | |
1422 | s++; | |
1423 | while (s < strend && *s == ch) | |
1424 | s++; | |
1425 | } | |
1426 | s++; | |
1427 | } | |
1428 | } | |
1429 | } | |
1430 | /*SUPPRESS 560*/ | |
1431 | else if (prog->anchored_substr != Nullsv | |
1432 | || (prog->float_substr != Nullsv | |
1433 | && prog->float_max_offset < strend - s)) { | |
1434 | SV *must = prog->anchored_substr | |
1435 | ? prog->anchored_substr : prog->float_substr; | |
1436 | I32 back_max = | |
1437 | prog->anchored_substr ? prog->anchored_offset : prog->float_max_offset; | |
1438 | I32 back_min = | |
1439 | prog->anchored_substr ? prog->anchored_offset : prog->float_min_offset; | |
1440 | I32 delta = back_max - back_min; | |
1441 | char *last = HOPc(strend, /* Cannot start after this */ | |
1442 | -(I32)(CHR_SVLEN(must) | |
1443 | - (SvTAIL(must) != 0) + back_min)); | |
1444 | char *last1; /* Last position checked before */ | |
1445 | ||
1446 | if (s > PL_bostr) | |
1447 | last1 = HOPc(s, -1); | |
1448 | else | |
1449 | last1 = s - 1; /* bogus */ | |
1450 | ||
1451 | /* XXXX check_substr already used to find `s', can optimize if | |
1452 | check_substr==must. */ | |
1453 | scream_pos = -1; | |
1454 | dontbother = end_shift; | |
1455 | strend = HOPc(strend, -dontbother); | |
1456 | while ( (s <= last) && | |
1457 | ((flags & REXEC_SCREAM) | |
1458 | ? (s = screaminstr(sv, must, HOPc(s, back_min) - strbeg, | |
1459 | end_shift, &scream_pos, 0)) | |
1460 | : (s = fbm_instr((unsigned char*)HOP(s, back_min), | |
1461 | (unsigned char*)strend, must, | |
1462 | PL_multiline ? FBMrf_MULTILINE : 0))) ) { | |
1463 | if (HOPc(s, -back_max) > last1) { | |
1464 | last1 = HOPc(s, -back_min); | |
1465 | s = HOPc(s, -back_max); | |
1466 | } | |
1467 | else { | |
1468 | char *t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1; | |
1469 | ||
1470 | last1 = HOPc(s, -back_min); | |
1471 | s = t; | |
1472 | } | |
1473 | if (UTF) { | |
1474 | while (s <= last1) { | |
1475 | if (regtry(prog, s)) | |
1476 | goto got_it; | |
1477 | s += UTF8SKIP(s); | |
1478 | } | |
1479 | } | |
1480 | else { | |
1481 | while (s <= last1) { | |
1482 | if (regtry(prog, s)) | |
1483 | goto got_it; | |
1484 | s++; | |
1485 | } | |
1486 | } | |
1487 | } | |
1488 | goto phooey; | |
1489 | } | |
1490 | else if (c = prog->regstclass) { | |
1491 | if (minlen) /* don't bother with what can't match */ | |
1492 | strend = HOPc(strend, -(minlen - 1)); | |
1493 | if (find_byclass(prog, c, s, strend, startpos, 0)) | |
1494 | goto got_it; | |
d6a28714 JH |
1495 | } |
1496 | else { | |
1497 | dontbother = 0; | |
1498 | if (prog->float_substr != Nullsv) { /* Trim the end. */ | |
1499 | char *last; | |
1500 | I32 oldpos = scream_pos; | |
1501 | ||
1502 | if (flags & REXEC_SCREAM) { | |
1503 | last = screaminstr(sv, prog->float_substr, s - strbeg, | |
1504 | end_shift, &scream_pos, 1); /* last one */ | |
1505 | if (!last) | |
1506 | last = scream_olds; /* Only one occurence. */ | |
b8c5462f | 1507 | } |
d6a28714 JH |
1508 | else { |
1509 | STRLEN len; | |
1510 | char *little = SvPV(prog->float_substr, len); | |
1511 | ||
1512 | if (SvTAIL(prog->float_substr)) { | |
1513 | if (memEQ(strend - len + 1, little, len - 1)) | |
1514 | last = strend - len + 1; | |
1515 | else if (!PL_multiline) | |
1516 | last = memEQ(strend - len, little, len) | |
1517 | ? strend - len : Nullch; | |
b8c5462f | 1518 | else |
d6a28714 JH |
1519 | goto find_last; |
1520 | } else { | |
1521 | find_last: | |
1522 | if (len) | |
1523 | last = rninstr(s, strend, little, little + len); | |
b8c5462f | 1524 | else |
d6a28714 | 1525 | last = strend; /* matching `$' */ |
b8c5462f | 1526 | } |
b8c5462f | 1527 | } |
d6a28714 JH |
1528 | if (last == NULL) goto phooey; /* Should not happen! */ |
1529 | dontbother = strend - last + prog->float_min_offset; | |
1530 | } | |
1531 | if (minlen && (dontbother < minlen)) | |
1532 | dontbother = minlen - 1; | |
1533 | strend -= dontbother; /* this one's always in bytes! */ | |
1534 | /* We don't know much -- general case. */ | |
1535 | if (UTF) { | |
1536 | for (;;) { | |
1537 | if (regtry(prog, s)) | |
1538 | goto got_it; | |
1539 | if (s >= strend) | |
1540 | break; | |
b8c5462f | 1541 | s += UTF8SKIP(s); |
d6a28714 JH |
1542 | }; |
1543 | } | |
1544 | else { | |
1545 | do { | |
1546 | if (regtry(prog, s)) | |
1547 | goto got_it; | |
1548 | } while (s++ < strend); | |
1549 | } | |
1550 | } | |
1551 | ||
1552 | /* Failure. */ | |
1553 | goto phooey; | |
1554 | ||
1555 | got_it: | |
1556 | RX_MATCH_TAINTED_set(prog, PL_reg_flags & RF_tainted); | |
1557 | ||
1558 | if (PL_reg_eval_set) { | |
1559 | /* Preserve the current value of $^R */ | |
1560 | if (oreplsv != GvSV(PL_replgv)) | |
1561 | sv_setsv(oreplsv, GvSV(PL_replgv));/* So that when GvSV(replgv) is | |
1562 | restored, the value remains | |
1563 | the same. */ | |
1564 | restore_pos(aTHXo_ 0); | |
1565 | } | |
1566 | ||
1567 | /* make sure $`, $&, $', and $digit will work later */ | |
1568 | if ( !(flags & REXEC_NOT_FIRST) ) { | |
1569 | if (RX_MATCH_COPIED(prog)) { | |
1570 | Safefree(prog->subbeg); | |
1571 | RX_MATCH_COPIED_off(prog); | |
1572 | } | |
1573 | if (flags & REXEC_COPY_STR) { | |
1574 | I32 i = PL_regeol - startpos + (stringarg - strbeg); | |
1575 | ||
1576 | s = savepvn(strbeg, i); | |
1577 | prog->subbeg = s; | |
1578 | prog->sublen = i; | |
1579 | RX_MATCH_COPIED_on(prog); | |
1580 | } | |
1581 | else { | |
1582 | prog->subbeg = strbeg; | |
1583 | prog->sublen = PL_regeol - strbeg; /* strend may have been modified */ | |
1584 | } | |
1585 | } | |
1586 | ||
1587 | return 1; | |
1588 | ||
1589 | phooey: | |
1590 | if (PL_reg_eval_set) | |
1591 | restore_pos(aTHXo_ 0); | |
1592 | return 0; | |
1593 | } | |
1594 | ||
1595 | /* | |
1596 | - regtry - try match at specific point | |
1597 | */ | |
1598 | STATIC I32 /* 0 failure, 1 success */ | |
1599 | S_regtry(pTHX_ regexp *prog, char *startpos) | |
1600 | { | |
1601 | dTHR; | |
1602 | register I32 i; | |
1603 | register I32 *sp; | |
1604 | register I32 *ep; | |
1605 | CHECKPOINT lastcp; | |
1606 | ||
1607 | if ((prog->reganch & ROPT_EVAL_SEEN) && !PL_reg_eval_set) { | |
1608 | MAGIC *mg; | |
1609 | ||
1610 | PL_reg_eval_set = RS_init; | |
1611 | DEBUG_r(DEBUG_s( | |
b900a521 JH |
1612 | PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n", |
1613 | (IV)(PL_stack_sp - PL_stack_base)); | |
d6a28714 JH |
1614 | )); |
1615 | SAVEINT(cxstack[cxstack_ix].blk_oldsp); | |
1616 | cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base; | |
1617 | /* Otherwise OP_NEXTSTATE will free whatever on stack now. */ | |
1618 | SAVETMPS; | |
1619 | /* Apparently this is not needed, judging by wantarray. */ | |
1620 | /* SAVEINT(cxstack[cxstack_ix].blk_gimme); | |
1621 | cxstack[cxstack_ix].blk_gimme = G_SCALAR; */ | |
1622 | ||
1623 | if (PL_reg_sv) { | |
1624 | /* Make $_ available to executed code. */ | |
1625 | if (PL_reg_sv != DEFSV) { | |
1626 | /* SAVE_DEFSV does *not* suffice here for USE_THREADS */ | |
1627 | SAVESPTR(DEFSV); | |
1628 | DEFSV = PL_reg_sv; | |
b8c5462f | 1629 | } |
d6a28714 JH |
1630 | |
1631 | if (!(SvTYPE(PL_reg_sv) >= SVt_PVMG && SvMAGIC(PL_reg_sv) | |
1632 | && (mg = mg_find(PL_reg_sv, 'g')))) { | |
1633 | /* prepare for quick setting of pos */ | |
1634 | sv_magic(PL_reg_sv, (SV*)0, 'g', Nullch, 0); | |
1635 | mg = mg_find(PL_reg_sv, 'g'); | |
1636 | mg->mg_len = -1; | |
b8c5462f | 1637 | } |
d6a28714 JH |
1638 | PL_reg_magic = mg; |
1639 | PL_reg_oldpos = mg->mg_len; | |
c76ac1ee | 1640 | SAVEDESTRUCTOR_X(restore_pos, 0); |
d6a28714 JH |
1641 | } |
1642 | if (!PL_reg_curpm) | |
1643 | New(22,PL_reg_curpm, 1, PMOP); | |
1644 | PL_reg_curpm->op_pmregexp = prog; | |
1645 | PL_reg_oldcurpm = PL_curpm; | |
1646 | PL_curpm = PL_reg_curpm; | |
1647 | if (RX_MATCH_COPIED(prog)) { | |
1648 | /* Here is a serious problem: we cannot rewrite subbeg, | |
1649 | since it may be needed if this match fails. Thus | |
1650 | $` inside (?{}) could fail... */ | |
1651 | PL_reg_oldsaved = prog->subbeg; | |
1652 | PL_reg_oldsavedlen = prog->sublen; | |
1653 | RX_MATCH_COPIED_off(prog); | |
1654 | } | |
1655 | else | |
1656 | PL_reg_oldsaved = Nullch; | |
1657 | prog->subbeg = PL_bostr; | |
1658 | prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */ | |
1659 | } | |
1660 | prog->startp[0] = startpos - PL_bostr; | |
1661 | PL_reginput = startpos; | |
1662 | PL_regstartp = prog->startp; | |
1663 | PL_regendp = prog->endp; | |
1664 | PL_reglastparen = &prog->lastparen; | |
1665 | prog->lastparen = 0; | |
1666 | PL_regsize = 0; | |
1667 | DEBUG_r(PL_reg_starttry = startpos); | |
1668 | if (PL_reg_start_tmpl <= prog->nparens) { | |
1669 | PL_reg_start_tmpl = prog->nparens*3/2 + 3; | |
1670 | if(PL_reg_start_tmp) | |
1671 | Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*); | |
1672 | else | |
1673 | New(22,PL_reg_start_tmp, PL_reg_start_tmpl, char*); | |
1674 | } | |
1675 | ||
1676 | /* XXXX What this code is doing here?!!! There should be no need | |
1677 | to do this again and again, PL_reglastparen should take care of | |
1678 | this! */ | |
1679 | sp = prog->startp; | |
1680 | ep = prog->endp; | |
1681 | if (prog->nparens) { | |
1682 | for (i = prog->nparens; i >= 1; i--) { | |
1683 | *++sp = -1; | |
1684 | *++ep = -1; | |
1685 | } | |
1686 | } | |
1687 | REGCP_SET; | |
1688 | if (regmatch(prog->program + 1)) { | |
1689 | prog->endp[0] = PL_reginput - PL_bostr; | |
1690 | return 1; | |
1691 | } | |
1692 | REGCP_UNWIND; | |
1693 | return 0; | |
1694 | } | |
1695 | ||
1696 | /* | |
1697 | - regmatch - main matching routine | |
1698 | * | |
1699 | * Conceptually the strategy is simple: check to see whether the current | |
1700 | * node matches, call self recursively to see whether the rest matches, | |
1701 | * and then act accordingly. In practice we make some effort to avoid | |
1702 | * recursion, in particular by going through "ordinary" nodes (that don't | |
1703 | * need to know whether the rest of the match failed) by a loop instead of | |
1704 | * by recursion. | |
1705 | */ | |
1706 | /* [lwall] I've hoisted the register declarations to the outer block in order to | |
1707 | * maybe save a little bit of pushing and popping on the stack. It also takes | |
1708 | * advantage of machines that use a register save mask on subroutine entry. | |
1709 | */ | |
1710 | STATIC I32 /* 0 failure, 1 success */ | |
1711 | S_regmatch(pTHX_ regnode *prog) | |
1712 | { | |
1713 | dTHR; | |
1714 | register regnode *scan; /* Current node. */ | |
1715 | regnode *next; /* Next node. */ | |
1716 | regnode *inner; /* Next node in internal branch. */ | |
1717 | register I32 nextchr; /* renamed nextchr - nextchar colides with | |
1718 | function of same name */ | |
1719 | register I32 n; /* no or next */ | |
1720 | register I32 ln; /* len or last */ | |
1721 | register char *s; /* operand or save */ | |
1722 | register char *locinput = PL_reginput; | |
1723 | register I32 c1, c2, paren; /* case fold search, parenth */ | |
1724 | int minmod = 0, sw = 0, logical = 0; | |
1725 | #ifdef DEBUGGING | |
1726 | PL_regindent++; | |
1727 | #endif | |
1728 | ||
1729 | /* Note that nextchr is a byte even in UTF */ | |
1730 | nextchr = UCHARAT(locinput); | |
1731 | scan = prog; | |
1732 | while (scan != NULL) { | |
1733 | #define sayNO_L (logical ? (logical = 0, sw = 0, goto cont) : sayNO) | |
1734 | #ifdef DEBUGGING | |
1735 | # define sayYES goto yes | |
1736 | # define sayNO goto no | |
7821416a IZ |
1737 | # define sayYES_FINAL goto yes_final |
1738 | # define sayYES_LOUD goto yes_loud | |
1739 | # define sayNO_FINAL goto no_final | |
1740 | # define sayNO_SILENT goto do_no | |
d6a28714 JH |
1741 | # define saySAME(x) if (x) goto yes; else goto no |
1742 | # define REPORT_CODE_OFF 24 | |
1743 | #else | |
1744 | # define sayYES return 1 | |
1745 | # define sayNO return 0 | |
7821416a IZ |
1746 | # define sayYES_FINAL return 1 |
1747 | # define sayYES_LOUD return 1 | |
1748 | # define sayNO_FINAL return 0 | |
1749 | # define sayNO_SILENT return 0 | |
d6a28714 JH |
1750 | # define saySAME(x) return x |
1751 | #endif | |
1752 | DEBUG_r( { | |
1753 | SV *prop = sv_newmortal(); | |
1754 | int docolor = *PL_colors[0]; | |
1755 | int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */ | |
1756 | int l = (PL_regeol - locinput > taill ? taill : PL_regeol - locinput); | |
1757 | /* The part of the string before starttry has one color | |
1758 | (pref0_len chars), between starttry and current | |
1759 | position another one (pref_len - pref0_len chars), | |
1760 | after the current position the third one. | |
1761 | We assume that pref0_len <= pref_len, otherwise we | |
1762 | decrease pref0_len. */ | |
1763 | int pref_len = (locinput - PL_bostr > (5 + taill) - l | |
1764 | ? (5 + taill) - l : locinput - PL_bostr); | |
1765 | int pref0_len = pref_len - (locinput - PL_reg_starttry); | |
1766 | ||
1767 | if (l + pref_len < (5 + taill) && l < PL_regeol - locinput) | |
1768 | l = ( PL_regeol - locinput > (5 + taill) - pref_len | |
1769 | ? (5 + taill) - pref_len : PL_regeol - locinput); | |
1770 | if (pref0_len < 0) | |
1771 | pref0_len = 0; | |
1772 | if (pref0_len > pref_len) | |
1773 | pref0_len = pref_len; | |
1774 | regprop(prop, scan); | |
1775 | PerlIO_printf(Perl_debug_log, | |
b900a521 JH |
1776 | "%4"IVdf" <%s%.*s%s%s%.*s%s%s%s%.*s%s>%*s|%3"IVdf":%*s%s\n", |
1777 | (IV)(locinput - PL_bostr), | |
d6a28714 JH |
1778 | PL_colors[4], pref0_len, |
1779 | locinput - pref_len, PL_colors[5], | |
1780 | PL_colors[2], pref_len - pref0_len, | |
1781 | locinput - pref_len + pref0_len, PL_colors[3], | |
1782 | (docolor ? "" : "> <"), | |
1783 | PL_colors[0], l, locinput, PL_colors[1], | |
1784 | 15 - l - pref_len + 1, | |
1785 | "", | |
b900a521 | 1786 | (IV)(scan - PL_regprogram), PL_regindent*2, "", |
d6a28714 JH |
1787 | SvPVX(prop)); |
1788 | } ); | |
1789 | ||
1790 | next = scan + NEXT_OFF(scan); | |
1791 | if (next == scan) | |
1792 | next = NULL; | |
1793 | ||
1794 | switch (OP(scan)) { | |
1795 | case BOL: | |
1796 | if (locinput == PL_bostr | |
1797 | ? PL_regprev == '\n' | |
1798 | : (PL_multiline && | |
1799 | (nextchr || locinput < PL_regeol) && locinput[-1] == '\n') ) | |
1800 | { | |
1801 | /* regtill = regbol; */ | |
b8c5462f JH |
1802 | break; |
1803 | } | |
d6a28714 JH |
1804 | sayNO; |
1805 | case MBOL: | |
1806 | if (locinput == PL_bostr | |
1807 | ? PL_regprev == '\n' | |
1808 | : ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n') ) | |
1809 | { | |
b8c5462f JH |
1810 | break; |
1811 | } | |
d6a28714 JH |
1812 | sayNO; |
1813 | case SBOL: | |
1814 | if (locinput == PL_regbol && PL_regprev == '\n') | |
b8c5462f | 1815 | break; |
d6a28714 JH |
1816 | sayNO; |
1817 | case GPOS: | |
1818 | if (locinput == PL_reg_ganch) | |
1819 | break; | |
1820 | sayNO; | |
1821 | case EOL: | |
1822 | if (PL_multiline) | |
1823 | goto meol; | |
1824 | else | |
1825 | goto seol; | |
1826 | case MEOL: | |
1827 | meol: | |
1828 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') | |
b8c5462f | 1829 | sayNO; |
b8c5462f | 1830 | break; |
d6a28714 JH |
1831 | case SEOL: |
1832 | seol: | |
1833 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') | |
b8c5462f | 1834 | sayNO; |
d6a28714 | 1835 | if (PL_regeol - locinput > 1) |
b8c5462f | 1836 | sayNO; |
b8c5462f | 1837 | break; |
d6a28714 JH |
1838 | case EOS: |
1839 | if (PL_regeol != locinput) | |
b8c5462f | 1840 | sayNO; |
d6a28714 JH |
1841 | break; |
1842 | case SANYUTF8: | |
b8c5462f | 1843 | if (nextchr & 0x80) { |
b8c5462f | 1844 | locinput += PL_utf8skip[nextchr]; |
d6a28714 JH |
1845 | if (locinput > PL_regeol) |
1846 | sayNO; | |
b8c5462f JH |
1847 | nextchr = UCHARAT(locinput); |
1848 | break; | |
1849 | } | |
d6a28714 | 1850 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 | 1851 | sayNO; |
b8c5462f | 1852 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 1853 | break; |
d6a28714 JH |
1854 | case SANY: |
1855 | if (!nextchr && locinput >= PL_regeol) | |
b8c5462f JH |
1856 | sayNO; |
1857 | nextchr = UCHARAT(++locinput); | |
b85d18e9 | 1858 | break; |
d6a28714 | 1859 | case ANYUTF8: |
a0ed51b3 | 1860 | if (nextchr & 0x80) { |
b8c5462f | 1861 | locinput += PL_utf8skip[nextchr]; |
d6a28714 JH |
1862 | if (locinput > PL_regeol) |
1863 | sayNO; | |
a0ed51b3 LW |
1864 | nextchr = UCHARAT(locinput); |
1865 | break; | |
1866 | } | |
d6a28714 | 1867 | if (!nextchr && locinput >= PL_regeol || nextchr == '\n') |
a0ed51b3 LW |
1868 | sayNO; |
1869 | nextchr = UCHARAT(++locinput); | |
1870 | break; | |
d6a28714 JH |
1871 | case REG_ANY: |
1872 | if (!nextchr && locinput >= PL_regeol || nextchr == '\n') | |
4633a7c4 | 1873 | sayNO; |
76e3520e | 1874 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 1875 | break; |
d6a28714 | 1876 | case EXACT: |
cd439c50 IZ |
1877 | s = STRING(scan); |
1878 | ln = STR_LEN(scan); | |
d6a28714 JH |
1879 | /* Inline the first character, for speed. */ |
1880 | if (UCHARAT(s) != nextchr) | |
1881 | sayNO; | |
1882 | if (PL_regeol - locinput < ln) | |
1883 | sayNO; | |
1884 | if (ln > 1 && memNE(s, locinput, ln)) | |
1885 | sayNO; | |
1886 | locinput += ln; | |
1887 | nextchr = UCHARAT(locinput); | |
1888 | break; | |
1889 | case EXACTFL: | |
b8c5462f JH |
1890 | PL_reg_flags |= RF_tainted; |
1891 | /* FALL THROUGH */ | |
d6a28714 | 1892 | case EXACTF: |
cd439c50 IZ |
1893 | s = STRING(scan); |
1894 | ln = STR_LEN(scan); | |
d6a28714 JH |
1895 | |
1896 | if (UTF) { | |
1897 | char *l = locinput; | |
1898 | char *e = s + ln; | |
1899 | c1 = OP(scan) == EXACTF; | |
1900 | while (s < e) { | |
1901 | if (l >= PL_regeol) | |
1902 | sayNO; | |
1903 | if (utf8_to_uv((U8*)s, 0) != (c1 ? | |
1904 | toLOWER_utf8((U8*)l) : | |
1905 | toLOWER_LC_utf8((U8*)l))) | |
1906 | { | |
1907 | sayNO; | |
1908 | } | |
1909 | s += UTF8SKIP(s); | |
1910 | l += UTF8SKIP(l); | |
b8c5462f | 1911 | } |
d6a28714 | 1912 | locinput = l; |
a0ed51b3 LW |
1913 | nextchr = UCHARAT(locinput); |
1914 | break; | |
1915 | } | |
d6a28714 JH |
1916 | |
1917 | /* Inline the first character, for speed. */ | |
1918 | if (UCHARAT(s) != nextchr && | |
1919 | UCHARAT(s) != ((OP(scan) == EXACTF) | |
1920 | ? PL_fold : PL_fold_locale)[nextchr]) | |
a0ed51b3 | 1921 | sayNO; |
d6a28714 | 1922 | if (PL_regeol - locinput < ln) |
b8c5462f | 1923 | sayNO; |
d6a28714 JH |
1924 | if (ln > 1 && (OP(scan) == EXACTF |
1925 | ? ibcmp(s, locinput, ln) | |
1926 | : ibcmp_locale(s, locinput, ln))) | |
4633a7c4 | 1927 | sayNO; |
d6a28714 JH |
1928 | locinput += ln; |
1929 | nextchr = UCHARAT(locinput); | |
a0d0e21e | 1930 | break; |
d6a28714 | 1931 | case ANYOFUTF8: |
d6a28714 | 1932 | if (!REGINCLASSUTF8(scan, (U8*)locinput)) |
4633a7c4 | 1933 | sayNO; |
d6a28714 JH |
1934 | if (locinput >= PL_regeol) |
1935 | sayNO; | |
1936 | locinput += PL_utf8skip[nextchr]; | |
1937 | nextchr = UCHARAT(locinput); | |
1938 | break; | |
1939 | case ANYOF: | |
d6a28714 | 1940 | if (nextchr < 0) |
b8c5462f | 1941 | nextchr = UCHARAT(locinput); |
936ed897 | 1942 | if (!REGINCLASS(scan, nextchr)) |
d6a28714 JH |
1943 | sayNO; |
1944 | if (!nextchr && locinput >= PL_regeol) | |
4633a7c4 | 1945 | sayNO; |
b8c5462f JH |
1946 | nextchr = UCHARAT(++locinput); |
1947 | break; | |
d6a28714 | 1948 | case ALNUML: |
b8c5462f JH |
1949 | PL_reg_flags |= RF_tainted; |
1950 | /* FALL THROUGH */ | |
d6a28714 | 1951 | case ALNUM: |
b8c5462f | 1952 | if (!nextchr) |
4633a7c4 | 1953 | sayNO; |
d6a28714 JH |
1954 | if (!(OP(scan) == ALNUM |
1955 | ? isALNUM(nextchr) : isALNUM_LC(nextchr))) | |
b8c5462f JH |
1956 | sayNO; |
1957 | nextchr = UCHARAT(++locinput); | |
bbce6d69 | 1958 | break; |
d6a28714 | 1959 | case ALNUMLUTF8: |
3280af22 | 1960 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 1961 | /* FALL THROUGH */ |
d6a28714 | 1962 | case ALNUMUTF8: |
b8c5462f JH |
1963 | if (!nextchr) |
1964 | sayNO; | |
1965 | if (nextchr & 0x80) { | |
d6a28714 JH |
1966 | if (!(OP(scan) == ALNUMUTF8 |
1967 | ? swash_fetch(PL_utf8_alnum, (U8*)locinput) | |
1968 | : isALNUM_LC_utf8((U8*)locinput))) | |
b8c5462f JH |
1969 | { |
1970 | sayNO; | |
a0ed51b3 | 1971 | } |
b8c5462f | 1972 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
1973 | nextchr = UCHARAT(locinput); |
1974 | break; | |
1975 | } | |
d6a28714 JH |
1976 | if (!(OP(scan) == ALNUMUTF8 |
1977 | ? isALNUM(nextchr) : isALNUM_LC(nextchr))) | |
bbce6d69 | 1978 | sayNO; |
b8c5462f | 1979 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 1980 | break; |
d6a28714 | 1981 | case NALNUML: |
b8c5462f JH |
1982 | PL_reg_flags |= RF_tainted; |
1983 | /* FALL THROUGH */ | |
d6a28714 JH |
1984 | case NALNUM: |
1985 | if (!nextchr && locinput >= PL_regeol) | |
a0ed51b3 | 1986 | sayNO; |
d6a28714 JH |
1987 | if (OP(scan) == NALNUM |
1988 | ? isALNUM(nextchr) : isALNUM_LC(nextchr)) | |
a0ed51b3 | 1989 | sayNO; |
b8c5462f | 1990 | nextchr = UCHARAT(++locinput); |
a0ed51b3 | 1991 | break; |
d6a28714 | 1992 | case NALNUMLUTF8: |
b8c5462f JH |
1993 | PL_reg_flags |= RF_tainted; |
1994 | /* FALL THROUGH */ | |
d6a28714 | 1995 | case NALNUMUTF8: |
3280af22 | 1996 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 | 1997 | sayNO; |
b8c5462f | 1998 | if (nextchr & 0x80) { |
d6a28714 JH |
1999 | if (OP(scan) == NALNUMUTF8 |
2000 | ? swash_fetch(PL_utf8_alnum, (U8*)locinput) | |
2001 | : isALNUM_LC_utf8((U8*)locinput)) | |
2002 | { | |
b8c5462f | 2003 | sayNO; |
d6a28714 | 2004 | } |
b8c5462f JH |
2005 | locinput += PL_utf8skip[nextchr]; |
2006 | nextchr = UCHARAT(locinput); | |
2007 | break; | |
2008 | } | |
d6a28714 JH |
2009 | if (OP(scan) == NALNUMUTF8 |
2010 | ? isALNUM(nextchr) : isALNUM_LC(nextchr)) | |
b8c5462f | 2011 | sayNO; |
76e3520e | 2012 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 2013 | break; |
d6a28714 JH |
2014 | case BOUNDL: |
2015 | case NBOUNDL: | |
3280af22 | 2016 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 2017 | /* FALL THROUGH */ |
d6a28714 JH |
2018 | case BOUND: |
2019 | case NBOUND: | |
2020 | /* was last char in word? */ | |
2021 | ln = (locinput != PL_regbol) ? UCHARAT(locinput - 1) : PL_regprev; | |
2022 | if (OP(scan) == BOUND || OP(scan) == NBOUND) { | |
2023 | ln = isALNUM(ln); | |
2024 | n = isALNUM(nextchr); | |
2025 | } | |
2026 | else { | |
2027 | ln = isALNUM_LC(ln); | |
2028 | n = isALNUM_LC(nextchr); | |
2029 | } | |
2030 | if (((!ln) == (!n)) == (OP(scan) == BOUND || OP(scan) == BOUNDL)) | |
4633a7c4 | 2031 | sayNO; |
a0d0e21e | 2032 | break; |
d6a28714 JH |
2033 | case BOUNDLUTF8: |
2034 | case NBOUNDLUTF8: | |
a0ed51b3 LW |
2035 | PL_reg_flags |= RF_tainted; |
2036 | /* FALL THROUGH */ | |
d6a28714 JH |
2037 | case BOUNDUTF8: |
2038 | case NBOUNDUTF8: | |
2039 | /* was last char in word? */ | |
2040 | ln = (locinput != PL_regbol) | |
2041 | ? utf8_to_uv(reghop((U8*)locinput, -1), 0) : PL_regprev; | |
2042 | if (OP(scan) == BOUNDUTF8 || OP(scan) == NBOUNDUTF8) { | |
2043 | ln = isALNUM_uni(ln); | |
2044 | n = swash_fetch(PL_utf8_alnum, (U8*)locinput); | |
a0ed51b3 | 2045 | } |
d6a28714 JH |
2046 | else { |
2047 | ln = isALNUM_LC_uni(ln); | |
2048 | n = isALNUM_LC_utf8((U8*)locinput); | |
2049 | } | |
2050 | if (((!ln) == (!n)) == (OP(scan) == BOUNDUTF8 || OP(scan) == BOUNDLUTF8)) | |
a0ed51b3 | 2051 | sayNO; |
a0ed51b3 | 2052 | break; |
d6a28714 | 2053 | case SPACEL: |
3280af22 | 2054 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 2055 | /* FALL THROUGH */ |
d6a28714 JH |
2056 | case SPACE: |
2057 | if (!nextchr && locinput >= PL_regeol) | |
4633a7c4 | 2058 | sayNO; |
d6a28714 JH |
2059 | if (!(OP(scan) == SPACE |
2060 | ? isSPACE(nextchr) : isSPACE_LC(nextchr))) | |
4633a7c4 | 2061 | sayNO; |
76e3520e | 2062 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 2063 | break; |
d6a28714 | 2064 | case SPACELUTF8: |
a0ed51b3 LW |
2065 | PL_reg_flags |= RF_tainted; |
2066 | /* FALL THROUGH */ | |
d6a28714 | 2067 | case SPACEUTF8: |
a0ed51b3 LW |
2068 | if (!nextchr && locinput >= PL_regeol) |
2069 | sayNO; | |
2070 | if (nextchr & 0x80) { | |
d6a28714 JH |
2071 | if (!(OP(scan) == SPACEUTF8 |
2072 | ? swash_fetch(PL_utf8_space,(U8*)locinput) | |
2073 | : isSPACE_LC_utf8((U8*)locinput))) | |
2074 | { | |
a0ed51b3 | 2075 | sayNO; |
d6a28714 | 2076 | } |
6f06b55f | 2077 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
2078 | nextchr = UCHARAT(locinput); |
2079 | break; | |
2080 | } | |
d6a28714 JH |
2081 | if (!(OP(scan) == SPACEUTF8 |
2082 | ? isSPACE(nextchr) : isSPACE_LC(nextchr))) | |
a0ed51b3 LW |
2083 | sayNO; |
2084 | nextchr = UCHARAT(++locinput); | |
2085 | break; | |
d6a28714 | 2086 | case NSPACEL: |
3280af22 | 2087 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 2088 | /* FALL THROUGH */ |
d6a28714 | 2089 | case NSPACE: |
b8c5462f JH |
2090 | if (!nextchr) |
2091 | sayNO; | |
d6a28714 JH |
2092 | if (OP(scan) == SPACE |
2093 | ? isSPACE(nextchr) : isSPACE_LC(nextchr)) | |
4633a7c4 | 2094 | sayNO; |
b8c5462f | 2095 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 2096 | break; |
d6a28714 | 2097 | case NSPACELUTF8: |
a0ed51b3 LW |
2098 | PL_reg_flags |= RF_tainted; |
2099 | /* FALL THROUGH */ | |
d6a28714 | 2100 | case NSPACEUTF8: |
b8c5462f JH |
2101 | if (!nextchr) |
2102 | sayNO; | |
2103 | if (nextchr & 0x80) { | |
d6a28714 JH |
2104 | if (OP(scan) == NSPACEUTF8 |
2105 | ? swash_fetch(PL_utf8_space,(U8*)locinput) | |
2106 | : isSPACE_LC_utf8((U8*)locinput)) | |
b8c5462f JH |
2107 | { |
2108 | sayNO; | |
2109 | } | |
2110 | locinput += PL_utf8skip[nextchr]; | |
2111 | nextchr = UCHARAT(locinput); | |
2112 | break; | |
a0ed51b3 | 2113 | } |
d6a28714 JH |
2114 | if (OP(scan) == NSPACEUTF8 |
2115 | ? isSPACE(nextchr) : isSPACE_LC(nextchr)) | |
4633a7c4 | 2116 | sayNO; |
76e3520e | 2117 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 2118 | break; |
d6a28714 | 2119 | case DIGITL: |
a0ed51b3 LW |
2120 | PL_reg_flags |= RF_tainted; |
2121 | /* FALL THROUGH */ | |
d6a28714 | 2122 | case DIGIT: |
a0ed51b3 LW |
2123 | if (!nextchr && locinput >= PL_regeol) |
2124 | sayNO; | |
d6a28714 JH |
2125 | if (!(OP(scan) == DIGIT |
2126 | ? isDIGIT(nextchr) : isDIGIT_LC(nextchr))) | |
4633a7c4 | 2127 | sayNO; |
76e3520e | 2128 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 2129 | break; |
d6a28714 | 2130 | case DIGITLUTF8: |
a0ed51b3 LW |
2131 | PL_reg_flags |= RF_tainted; |
2132 | /* FALL THROUGH */ | |
d6a28714 | 2133 | case DIGITUTF8: |
a0ed51b3 LW |
2134 | if (!nextchr) |
2135 | sayNO; | |
2136 | if (nextchr & 0x80) { | |
d6a28714 JH |
2137 | if (OP(scan) == NDIGITUTF8 |
2138 | ? swash_fetch(PL_utf8_digit,(U8*)locinput) | |
2139 | : isDIGIT_LC_utf8((U8*)locinput)) | |
dfe13c55 | 2140 | { |
a0ed51b3 | 2141 | sayNO; |
dfe13c55 | 2142 | } |
6f06b55f | 2143 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
2144 | nextchr = UCHARAT(locinput); |
2145 | break; | |
2146 | } | |
d6a28714 | 2147 | if (!isDIGIT(nextchr)) |
a0ed51b3 LW |
2148 | sayNO; |
2149 | nextchr = UCHARAT(++locinput); | |
2150 | break; | |
d6a28714 | 2151 | case NDIGITL: |
b8c5462f JH |
2152 | PL_reg_flags |= RF_tainted; |
2153 | /* FALL THROUGH */ | |
d6a28714 | 2154 | case NDIGIT: |
b8c5462f JH |
2155 | if (!nextchr) |
2156 | sayNO; | |
d6a28714 JH |
2157 | if (OP(scan) == DIGIT |
2158 | ? isDIGIT(nextchr) : isDIGIT_LC(nextchr)) | |
4633a7c4 | 2159 | sayNO; |
76e3520e | 2160 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 2161 | break; |
d6a28714 | 2162 | case NDIGITLUTF8: |
b8c5462f JH |
2163 | PL_reg_flags |= RF_tainted; |
2164 | /* FALL THROUGH */ | |
d6a28714 | 2165 | case NDIGITUTF8: |
b8c5462f JH |
2166 | if (!nextchr && locinput >= PL_regeol) |
2167 | sayNO; | |
a0ed51b3 | 2168 | if (nextchr & 0x80) { |
d6a28714 | 2169 | if (swash_fetch(PL_utf8_digit,(U8*)locinput)) |
a0ed51b3 | 2170 | sayNO; |
6f06b55f | 2171 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
2172 | nextchr = UCHARAT(locinput); |
2173 | break; | |
2174 | } | |
d6a28714 | 2175 | if (isDIGIT(nextchr)) |
a0ed51b3 LW |
2176 | sayNO; |
2177 | nextchr = UCHARAT(++locinput); | |
2178 | break; | |
2179 | case CLUMP: | |
dfe13c55 | 2180 | if (locinput >= PL_regeol || swash_fetch(PL_utf8_mark,(U8*)locinput)) |
a0ed51b3 | 2181 | sayNO; |
6f06b55f | 2182 | locinput += PL_utf8skip[nextchr]; |
dfe13c55 | 2183 | while (locinput < PL_regeol && swash_fetch(PL_utf8_mark,(U8*)locinput)) |
a0ed51b3 LW |
2184 | locinput += UTF8SKIP(locinput); |
2185 | if (locinput > PL_regeol) | |
2186 | sayNO; | |
2187 | nextchr = UCHARAT(locinput); | |
2188 | break; | |
c8756f30 | 2189 | case REFFL: |
3280af22 | 2190 | PL_reg_flags |= RF_tainted; |
c8756f30 | 2191 | /* FALL THROUGH */ |
c277df42 | 2192 | case REF: |
c8756f30 | 2193 | case REFF: |
c277df42 | 2194 | n = ARG(scan); /* which paren pair */ |
cf93c79d | 2195 | ln = PL_regstartp[n]; |
2c2d71f5 | 2196 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
cf93c79d | 2197 | if (*PL_reglastparen < n || ln == -1) |
af3f8c16 | 2198 | sayNO; /* Do not match unless seen CLOSEn. */ |
cf93c79d | 2199 | if (ln == PL_regendp[n]) |
a0d0e21e | 2200 | break; |
a0ed51b3 | 2201 | |
cf93c79d | 2202 | s = PL_bostr + ln; |
a0ed51b3 LW |
2203 | if (UTF && OP(scan) != REF) { /* REF can do byte comparison */ |
2204 | char *l = locinput; | |
cf93c79d | 2205 | char *e = PL_bostr + PL_regendp[n]; |
a0ed51b3 LW |
2206 | /* |
2207 | * Note that we can't do the "other character" lookup trick as | |
2208 | * in the 8-bit case (no pun intended) because in Unicode we | |
2209 | * have to map both upper and title case to lower case. | |
2210 | */ | |
2211 | if (OP(scan) == REFF) { | |
2212 | while (s < e) { | |
2213 | if (l >= PL_regeol) | |
2214 | sayNO; | |
dfe13c55 | 2215 | if (toLOWER_utf8((U8*)s) != toLOWER_utf8((U8*)l)) |
a0ed51b3 LW |
2216 | sayNO; |
2217 | s += UTF8SKIP(s); | |
2218 | l += UTF8SKIP(l); | |
2219 | } | |
2220 | } | |
2221 | else { | |
2222 | while (s < e) { | |
2223 | if (l >= PL_regeol) | |
2224 | sayNO; | |
dfe13c55 | 2225 | if (toLOWER_LC_utf8((U8*)s) != toLOWER_LC_utf8((U8*)l)) |
a0ed51b3 LW |
2226 | sayNO; |
2227 | s += UTF8SKIP(s); | |
2228 | l += UTF8SKIP(l); | |
2229 | } | |
2230 | } | |
2231 | locinput = l; | |
2232 | nextchr = UCHARAT(locinput); | |
2233 | break; | |
2234 | } | |
2235 | ||
a0d0e21e | 2236 | /* Inline the first character, for speed. */ |
76e3520e | 2237 | if (UCHARAT(s) != nextchr && |
c8756f30 AK |
2238 | (OP(scan) == REF || |
2239 | (UCHARAT(s) != ((OP(scan) == REFF | |
22c35a8c | 2240 | ? PL_fold : PL_fold_locale)[nextchr])))) |
4633a7c4 | 2241 | sayNO; |
cf93c79d | 2242 | ln = PL_regendp[n] - ln; |
3280af22 | 2243 | if (locinput + ln > PL_regeol) |
4633a7c4 | 2244 | sayNO; |
c8756f30 AK |
2245 | if (ln > 1 && (OP(scan) == REF |
2246 | ? memNE(s, locinput, ln) | |
2247 | : (OP(scan) == REFF | |
2248 | ? ibcmp(s, locinput, ln) | |
2249 | : ibcmp_locale(s, locinput, ln)))) | |
4633a7c4 | 2250 | sayNO; |
a0d0e21e | 2251 | locinput += ln; |
76e3520e | 2252 | nextchr = UCHARAT(locinput); |
a0d0e21e LW |
2253 | break; |
2254 | ||
2255 | case NOTHING: | |
c277df42 | 2256 | case TAIL: |
a0d0e21e LW |
2257 | break; |
2258 | case BACK: | |
2259 | break; | |
c277df42 IZ |
2260 | case EVAL: |
2261 | { | |
2262 | dSP; | |
533c011a | 2263 | OP_4tree *oop = PL_op; |
3280af22 NIS |
2264 | COP *ocurcop = PL_curcop; |
2265 | SV **ocurpad = PL_curpad; | |
c277df42 IZ |
2266 | SV *ret; |
2267 | ||
2268 | n = ARG(scan); | |
533c011a | 2269 | PL_op = (OP_4tree*)PL_regdata->data[n]; |
d7d93a81 | 2270 | DEBUG_r( PerlIO_printf(Perl_debug_log, " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) ); |
dfad63ad | 2271 | PL_curpad = AvARRAY((AV*)PL_regdata->data[n + 2]); |
cf93c79d | 2272 | PL_regendp[0] = PL_reg_magic->mg_len = locinput - PL_bostr; |
c277df42 | 2273 | |
cea2e8a9 | 2274 | CALLRUNOPS(aTHX); /* Scalar context. */ |
c277df42 IZ |
2275 | SPAGAIN; |
2276 | ret = POPs; | |
2277 | PUTBACK; | |
2278 | ||
0f5d15d6 IZ |
2279 | PL_op = oop; |
2280 | PL_curpad = ocurpad; | |
2281 | PL_curcop = ocurcop; | |
c277df42 | 2282 | if (logical) { |
0f5d15d6 IZ |
2283 | if (logical == 2) { /* Postponed subexpression. */ |
2284 | regexp *re; | |
22c35a8c | 2285 | MAGIC *mg = Null(MAGIC*); |
0f5d15d6 | 2286 | re_cc_state state; |
0f5d15d6 IZ |
2287 | CHECKPOINT cp, lastcp; |
2288 | ||
2289 | if(SvROK(ret) || SvRMAGICAL(ret)) { | |
2290 | SV *sv = SvROK(ret) ? SvRV(ret) : ret; | |
2291 | ||
2292 | if(SvMAGICAL(sv)) | |
2293 | mg = mg_find(sv, 'r'); | |
2294 | } | |
2295 | if (mg) { | |
2296 | re = (regexp *)mg->mg_obj; | |
df0003d4 | 2297 | (void)ReREFCNT_inc(re); |
0f5d15d6 IZ |
2298 | } |
2299 | else { | |
2300 | STRLEN len; | |
2301 | char *t = SvPV(ret, len); | |
2302 | PMOP pm; | |
2303 | char *oprecomp = PL_regprecomp; | |
2304 | I32 osize = PL_regsize; | |
2305 | I32 onpar = PL_regnpar; | |
2306 | ||
2307 | pm.op_pmflags = 0; | |
cea2e8a9 | 2308 | re = CALLREGCOMP(aTHX_ t, t + len, &pm); |
0f5d15d6 IZ |
2309 | if (!(SvFLAGS(ret) |
2310 | & (SVs_TEMP | SVs_PADTMP | SVf_READONLY))) | |
2311 | sv_magic(ret,(SV*)ReREFCNT_inc(re),'r',0,0); | |
2312 | PL_regprecomp = oprecomp; | |
2313 | PL_regsize = osize; | |
2314 | PL_regnpar = onpar; | |
2315 | } | |
2316 | DEBUG_r( | |
2317 | PerlIO_printf(Perl_debug_log, | |
2318 | "Entering embedded `%s%.60s%s%s'\n", | |
2319 | PL_colors[0], | |
2320 | re->precomp, | |
2321 | PL_colors[1], | |
2322 | (strlen(re->precomp) > 60 ? "..." : "")) | |
2323 | ); | |
2324 | state.node = next; | |
2325 | state.prev = PL_reg_call_cc; | |
2326 | state.cc = PL_regcc; | |
2327 | state.re = PL_reg_re; | |
2328 | ||
2ab05381 | 2329 | PL_regcc = 0; |
0f5d15d6 IZ |
2330 | |
2331 | cp = regcppush(0); /* Save *all* the positions. */ | |
2332 | REGCP_SET; | |
2333 | cache_re(re); | |
2334 | state.ss = PL_savestack_ix; | |
2335 | *PL_reglastparen = 0; | |
2336 | PL_reg_call_cc = &state; | |
2337 | PL_reginput = locinput; | |
2c2d71f5 JH |
2338 | |
2339 | /* XXXX This is too dramatic a measure... */ | |
2340 | PL_reg_maxiter = 0; | |
2341 | ||
0f5d15d6 | 2342 | if (regmatch(re->program + 1)) { |
2c914db6 IZ |
2343 | /* Even though we succeeded, we need to restore |
2344 | global variables, since we may be wrapped inside | |
2345 | SUSPEND, thus the match may be not finished yet. */ | |
2346 | ||
2347 | /* XXXX Do this only if SUSPENDed? */ | |
2348 | PL_reg_call_cc = state.prev; | |
2349 | PL_regcc = state.cc; | |
2350 | PL_reg_re = state.re; | |
2351 | cache_re(PL_reg_re); | |
2352 | ||
2353 | /* XXXX This is too dramatic a measure... */ | |
2354 | PL_reg_maxiter = 0; | |
2355 | ||
2356 | /* These are needed even if not SUSPEND. */ | |
0f5d15d6 IZ |
2357 | ReREFCNT_dec(re); |
2358 | regcpblow(cp); | |
2359 | sayYES; | |
2360 | } | |
0f5d15d6 IZ |
2361 | ReREFCNT_dec(re); |
2362 | REGCP_UNWIND; | |
2363 | regcppop(); | |
2364 | PL_reg_call_cc = state.prev; | |
2365 | PL_regcc = state.cc; | |
2366 | PL_reg_re = state.re; | |
d3790889 | 2367 | cache_re(PL_reg_re); |
2c2d71f5 JH |
2368 | |
2369 | /* XXXX This is too dramatic a measure... */ | |
2370 | PL_reg_maxiter = 0; | |
2371 | ||
0f5d15d6 IZ |
2372 | sayNO; |
2373 | } | |
c277df42 | 2374 | sw = SvTRUE(ret); |
0f5d15d6 | 2375 | logical = 0; |
a0ed51b3 LW |
2376 | } |
2377 | else | |
3280af22 | 2378 | sv_setsv(save_scalar(PL_replgv), ret); |
c277df42 IZ |
2379 | break; |
2380 | } | |
a0d0e21e | 2381 | case OPEN: |
c277df42 | 2382 | n = ARG(scan); /* which paren pair */ |
3280af22 NIS |
2383 | PL_reg_start_tmp[n] = locinput; |
2384 | if (n > PL_regsize) | |
2385 | PL_regsize = n; | |
a0d0e21e LW |
2386 | break; |
2387 | case CLOSE: | |
c277df42 | 2388 | n = ARG(scan); /* which paren pair */ |
cf93c79d IZ |
2389 | PL_regstartp[n] = PL_reg_start_tmp[n] - PL_bostr; |
2390 | PL_regendp[n] = locinput - PL_bostr; | |
3280af22 NIS |
2391 | if (n > *PL_reglastparen) |
2392 | *PL_reglastparen = n; | |
a0d0e21e | 2393 | break; |
c277df42 IZ |
2394 | case GROUPP: |
2395 | n = ARG(scan); /* which paren pair */ | |
cf93c79d | 2396 | sw = (*PL_reglastparen >= n && PL_regendp[n] != -1); |
c277df42 IZ |
2397 | break; |
2398 | case IFTHEN: | |
2c2d71f5 | 2399 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
c277df42 IZ |
2400 | if (sw) |
2401 | next = NEXTOPER(NEXTOPER(scan)); | |
2402 | else { | |
2403 | next = scan + ARG(scan); | |
2404 | if (OP(next) == IFTHEN) /* Fake one. */ | |
2405 | next = NEXTOPER(NEXTOPER(next)); | |
2406 | } | |
2407 | break; | |
2408 | case LOGICAL: | |
0f5d15d6 | 2409 | logical = scan->flags; |
c277df42 | 2410 | break; |
2ab05381 IZ |
2411 | /******************************************************************* |
2412 | PL_regcc contains infoblock about the innermost (...)* loop, and | |
2413 | a pointer to the next outer infoblock. | |
2414 | ||
2415 | Here is how Y(A)*Z is processed (if it is compiled into CURLYX/WHILEM): | |
2416 | ||
2417 | 1) After matching X, regnode for CURLYX is processed; | |
2418 | ||
2419 | 2) This regnode creates infoblock on the stack, and calls | |
2420 | regmatch() recursively with the starting point at WHILEM node; | |
2421 | ||
2422 | 3) Each hit of WHILEM node tries to match A and Z (in the order | |
2423 | depending on the current iteration, min/max of {min,max} and | |
2424 | greediness). The information about where are nodes for "A" | |
2425 | and "Z" is read from the infoblock, as is info on how many times "A" | |
2426 | was already matched, and greediness. | |
2427 | ||
2428 | 4) After A matches, the same WHILEM node is hit again. | |
2429 | ||
2430 | 5) Each time WHILEM is hit, PL_regcc is the infoblock created by CURLYX | |
2431 | of the same pair. Thus when WHILEM tries to match Z, it temporarily | |
2432 | resets PL_regcc, since this Y(A)*Z can be a part of some other loop: | |
2433 | as in (Y(A)*Z)*. If Z matches, the automaton will hit the WHILEM node | |
2434 | of the external loop. | |
2435 | ||
2436 | Currently present infoblocks form a tree with a stem formed by PL_curcc | |
2437 | and whatever it mentions via ->next, and additional attached trees | |
2438 | corresponding to temporarily unset infoblocks as in "5" above. | |
2439 | ||
2440 | In the following picture infoblocks for outer loop of | |
2441 | (Y(A)*?Z)*?T are denoted O, for inner I. NULL starting block | |
2442 | is denoted by x. The matched string is YAAZYAZT. Temporarily postponed | |
2443 | infoblocks are drawn below the "reset" infoblock. | |
2444 | ||
2445 | In fact in the picture below we do not show failed matches for Z and T | |
2446 | by WHILEM blocks. [We illustrate minimal matches, since for them it is | |
2447 | more obvious *why* one needs to *temporary* unset infoblocks.] | |
2448 | ||
2449 | Matched REx position InfoBlocks Comment | |
2450 | (Y(A)*?Z)*?T x | |
2451 | Y(A)*?Z)*?T x <- O | |
2452 | Y (A)*?Z)*?T x <- O | |
2453 | Y A)*?Z)*?T x <- O <- I | |
2454 | YA )*?Z)*?T x <- O <- I | |
2455 | YA A)*?Z)*?T x <- O <- I | |
2456 | YAA )*?Z)*?T x <- O <- I | |
2457 | YAA Z)*?T x <- O # Temporary unset I | |
2458 | I | |
2459 | ||
2460 | YAAZ Y(A)*?Z)*?T x <- O | |
2461 | I | |
2462 | ||
2463 | YAAZY (A)*?Z)*?T x <- O | |
2464 | I | |
2465 | ||
2466 | YAAZY A)*?Z)*?T x <- O <- I | |
2467 | I | |
2468 | ||
2469 | YAAZYA )*?Z)*?T x <- O <- I | |
2470 | I | |
2471 | ||
2472 | YAAZYA Z)*?T x <- O # Temporary unset I | |
2473 | I,I | |
2474 | ||
2475 | YAAZYAZ )*?T x <- O | |
2476 | I,I | |
2477 | ||
2478 | YAAZYAZ T x # Temporary unset O | |
2479 | O | |
2480 | I,I | |
2481 | ||
2482 | YAAZYAZT x | |
2483 | O | |
2484 | I,I | |
2485 | *******************************************************************/ | |
a0d0e21e LW |
2486 | case CURLYX: { |
2487 | CURCUR cc; | |
3280af22 | 2488 | CHECKPOINT cp = PL_savestack_ix; |
c277df42 IZ |
2489 | |
2490 | if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */ | |
2491 | next += ARG(next); | |
3280af22 NIS |
2492 | cc.oldcc = PL_regcc; |
2493 | PL_regcc = &cc; | |
2494 | cc.parenfloor = *PL_reglastparen; | |
a0d0e21e LW |
2495 | cc.cur = -1; |
2496 | cc.min = ARG1(scan); | |
2497 | cc.max = ARG2(scan); | |
c277df42 | 2498 | cc.scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS; |
a0d0e21e LW |
2499 | cc.next = next; |
2500 | cc.minmod = minmod; | |
2501 | cc.lastloc = 0; | |
3280af22 | 2502 | PL_reginput = locinput; |
a0d0e21e LW |
2503 | n = regmatch(PREVOPER(next)); /* start on the WHILEM */ |
2504 | regcpblow(cp); | |
3280af22 | 2505 | PL_regcc = cc.oldcc; |
4633a7c4 | 2506 | saySAME(n); |
a0d0e21e LW |
2507 | } |
2508 | /* NOT REACHED */ | |
2509 | case WHILEM: { | |
2510 | /* | |
2511 | * This is really hard to understand, because after we match | |
2512 | * what we're trying to match, we must make sure the rest of | |
2c2d71f5 | 2513 | * the REx is going to match for sure, and to do that we have |
a0d0e21e LW |
2514 | * to go back UP the parse tree by recursing ever deeper. And |
2515 | * if it fails, we have to reset our parent's current state | |
2516 | * that we can try again after backing off. | |
2517 | */ | |
2518 | ||
c277df42 | 2519 | CHECKPOINT cp, lastcp; |
3280af22 | 2520 | CURCUR* cc = PL_regcc; |
c277df42 IZ |
2521 | char *lastloc = cc->lastloc; /* Detection of 0-len. */ |
2522 | ||
4633a7c4 | 2523 | n = cc->cur + 1; /* how many we know we matched */ |
3280af22 | 2524 | PL_reginput = locinput; |
a0d0e21e | 2525 | |
c277df42 IZ |
2526 | DEBUG_r( |
2527 | PerlIO_printf(Perl_debug_log, | |
2528 | "%*s %ld out of %ld..%ld cc=%lx\n", | |
3280af22 | 2529 | REPORT_CODE_OFF+PL_regindent*2, "", |
c277df42 IZ |
2530 | (long)n, (long)cc->min, |
2531 | (long)cc->max, (long)cc) | |
2532 | ); | |
4633a7c4 | 2533 | |
a0d0e21e LW |
2534 | /* If degenerate scan matches "", assume scan done. */ |
2535 | ||
579cf2c3 | 2536 | if (locinput == cc->lastloc && n >= cc->min) { |
3280af22 | 2537 | PL_regcc = cc->oldcc; |
2ab05381 IZ |
2538 | if (PL_regcc) |
2539 | ln = PL_regcc->cur; | |
c277df42 | 2540 | DEBUG_r( |
c3464db5 DD |
2541 | PerlIO_printf(Perl_debug_log, |
2542 | "%*s empty match detected, try continuation...\n", | |
3280af22 | 2543 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 | 2544 | ); |
a0d0e21e | 2545 | if (regmatch(cc->next)) |
4633a7c4 | 2546 | sayYES; |
2ab05381 IZ |
2547 | if (PL_regcc) |
2548 | PL_regcc->cur = ln; | |
3280af22 | 2549 | PL_regcc = cc; |
4633a7c4 | 2550 | sayNO; |
a0d0e21e LW |
2551 | } |
2552 | ||
2553 | /* First just match a string of min scans. */ | |
2554 | ||
2555 | if (n < cc->min) { | |
2556 | cc->cur = n; | |
2557 | cc->lastloc = locinput; | |
4633a7c4 LW |
2558 | if (regmatch(cc->scan)) |
2559 | sayYES; | |
2560 | cc->cur = n - 1; | |
c277df42 | 2561 | cc->lastloc = lastloc; |
4633a7c4 | 2562 | sayNO; |
a0d0e21e LW |
2563 | } |
2564 | ||
2c2d71f5 JH |
2565 | if (scan->flags) { |
2566 | /* Check whether we already were at this position. | |
2567 | Postpone detection until we know the match is not | |
2568 | *that* much linear. */ | |
2569 | if (!PL_reg_maxiter) { | |
2570 | PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4); | |
2571 | PL_reg_leftiter = PL_reg_maxiter; | |
2572 | } | |
2573 | if (PL_reg_leftiter-- == 0) { | |
2574 | I32 size = (PL_reg_maxiter + 7)/8; | |
2575 | if (PL_reg_poscache) { | |
2576 | if (PL_reg_poscache_size < size) { | |
2577 | Renew(PL_reg_poscache, size, char); | |
2578 | PL_reg_poscache_size = size; | |
2579 | } | |
2580 | Zero(PL_reg_poscache, size, char); | |
2581 | } | |
2582 | else { | |
2583 | PL_reg_poscache_size = size; | |
2584 | Newz(29, PL_reg_poscache, size, char); | |
2585 | } | |
2586 | DEBUG_r( | |
2587 | PerlIO_printf(Perl_debug_log, | |
2588 | "%sDetected a super-linear match, switching on caching%s...\n", | |
2589 | PL_colors[4], PL_colors[5]) | |
2590 | ); | |
2591 | } | |
2592 | if (PL_reg_leftiter < 0) { | |
2593 | I32 o = locinput - PL_bostr, b; | |
2594 | ||
2595 | o = (scan->flags & 0xf) - 1 + o * (scan->flags>>4); | |
2596 | b = o % 8; | |
2597 | o /= 8; | |
2598 | if (PL_reg_poscache[o] & (1<<b)) { | |
2599 | DEBUG_r( | |
2600 | PerlIO_printf(Perl_debug_log, | |
2601 | "%*s already tried at this position...\n", | |
2602 | REPORT_CODE_OFF+PL_regindent*2, "") | |
2603 | ); | |
7821416a | 2604 | sayNO_SILENT; |
2c2d71f5 JH |
2605 | } |
2606 | PL_reg_poscache[o] |= (1<<b); | |
2607 | } | |
2608 | } | |
2609 | ||
a0d0e21e LW |
2610 | /* Prefer next over scan for minimal matching. */ |
2611 | ||
2612 | if (cc->minmod) { | |
3280af22 | 2613 | PL_regcc = cc->oldcc; |
2ab05381 IZ |
2614 | if (PL_regcc) |
2615 | ln = PL_regcc->cur; | |
5f05dabc | 2616 | cp = regcppush(cc->parenfloor); |
c277df42 | 2617 | REGCP_SET; |
5f05dabc | 2618 | if (regmatch(cc->next)) { |
c277df42 | 2619 | regcpblow(cp); |
4633a7c4 | 2620 | sayYES; /* All done. */ |
5f05dabc | 2621 | } |
c277df42 | 2622 | REGCP_UNWIND; |
5f05dabc | 2623 | regcppop(); |
2ab05381 IZ |
2624 | if (PL_regcc) |
2625 | PL_regcc->cur = ln; | |
3280af22 | 2626 | PL_regcc = cc; |
a0d0e21e | 2627 | |
c277df42 | 2628 | if (n >= cc->max) { /* Maximum greed exceeded? */ |
599cee73 | 2629 | if (ckWARN(WARN_UNSAFE) && n >= REG_INFTY |
3280af22 NIS |
2630 | && !(PL_reg_flags & RF_warned)) { |
2631 | PL_reg_flags |= RF_warned; | |
cea2e8a9 | 2632 | Perl_warner(aTHX_ WARN_UNSAFE, "%s limit (%d) exceeded", |
2f3ca594 GS |
2633 | "Complex regular subexpression recursion", |
2634 | REG_INFTY - 1); | |
c277df42 | 2635 | } |
4633a7c4 | 2636 | sayNO; |
c277df42 | 2637 | } |
a687059c | 2638 | |
c277df42 | 2639 | DEBUG_r( |
c3464db5 DD |
2640 | PerlIO_printf(Perl_debug_log, |
2641 | "%*s trying longer...\n", | |
3280af22 | 2642 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 | 2643 | ); |
a0d0e21e | 2644 | /* Try scanning more and see if it helps. */ |
3280af22 | 2645 | PL_reginput = locinput; |
a0d0e21e LW |
2646 | cc->cur = n; |
2647 | cc->lastloc = locinput; | |
5f05dabc | 2648 | cp = regcppush(cc->parenfloor); |
c277df42 | 2649 | REGCP_SET; |
5f05dabc | 2650 | if (regmatch(cc->scan)) { |
c277df42 | 2651 | regcpblow(cp); |
4633a7c4 | 2652 | sayYES; |
5f05dabc | 2653 | } |
c277df42 | 2654 | REGCP_UNWIND; |
5f05dabc | 2655 | regcppop(); |
4633a7c4 | 2656 | cc->cur = n - 1; |
c277df42 | 2657 | cc->lastloc = lastloc; |
4633a7c4 | 2658 | sayNO; |
a0d0e21e LW |
2659 | } |
2660 | ||
2661 | /* Prefer scan over next for maximal matching. */ | |
2662 | ||
2663 | if (n < cc->max) { /* More greed allowed? */ | |
5f05dabc | 2664 | cp = regcppush(cc->parenfloor); |
a0d0e21e LW |
2665 | cc->cur = n; |
2666 | cc->lastloc = locinput; | |
c277df42 | 2667 | REGCP_SET; |
5f05dabc | 2668 | if (regmatch(cc->scan)) { |
c277df42 | 2669 | regcpblow(cp); |
4633a7c4 | 2670 | sayYES; |
5f05dabc | 2671 | } |
c277df42 | 2672 | REGCP_UNWIND; |
a0d0e21e | 2673 | regcppop(); /* Restore some previous $<digit>s? */ |
3280af22 | 2674 | PL_reginput = locinput; |
c277df42 | 2675 | DEBUG_r( |
c3464db5 DD |
2676 | PerlIO_printf(Perl_debug_log, |
2677 | "%*s failed, try continuation...\n", | |
3280af22 | 2678 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 IZ |
2679 | ); |
2680 | } | |
599cee73 PM |
2681 | if (ckWARN(WARN_UNSAFE) && n >= REG_INFTY |
2682 | && !(PL_reg_flags & RF_warned)) { | |
3280af22 | 2683 | PL_reg_flags |= RF_warned; |
cea2e8a9 | 2684 | Perl_warner(aTHX_ WARN_UNSAFE, "%s limit (%d) exceeded", |
cb5d145d GS |
2685 | "Complex regular subexpression recursion", |
2686 | REG_INFTY - 1); | |
a0d0e21e LW |
2687 | } |
2688 | ||
2689 | /* Failed deeper matches of scan, so see if this one works. */ | |
3280af22 | 2690 | PL_regcc = cc->oldcc; |
2ab05381 IZ |
2691 | if (PL_regcc) |
2692 | ln = PL_regcc->cur; | |
a0d0e21e | 2693 | if (regmatch(cc->next)) |
4633a7c4 | 2694 | sayYES; |
2ab05381 IZ |
2695 | if (PL_regcc) |
2696 | PL_regcc->cur = ln; | |
3280af22 | 2697 | PL_regcc = cc; |
4633a7c4 | 2698 | cc->cur = n - 1; |
c277df42 | 2699 | cc->lastloc = lastloc; |
4633a7c4 | 2700 | sayNO; |
a0d0e21e LW |
2701 | } |
2702 | /* NOT REACHED */ | |
c277df42 IZ |
2703 | case BRANCHJ: |
2704 | next = scan + ARG(scan); | |
2705 | if (next == scan) | |
2706 | next = NULL; | |
2707 | inner = NEXTOPER(NEXTOPER(scan)); | |
2708 | goto do_branch; | |
2709 | case BRANCH: | |
2710 | inner = NEXTOPER(scan); | |
2711 | do_branch: | |
2712 | { | |
2713 | CHECKPOINT lastcp; | |
2714 | c1 = OP(scan); | |
2715 | if (OP(next) != c1) /* No choice. */ | |
2716 | next = inner; /* Avoid recursion. */ | |
a0d0e21e | 2717 | else { |
3280af22 | 2718 | int lastparen = *PL_reglastparen; |
c277df42 IZ |
2719 | |
2720 | REGCP_SET; | |
a0d0e21e | 2721 | do { |
3280af22 | 2722 | PL_reginput = locinput; |
c277df42 | 2723 | if (regmatch(inner)) |
4633a7c4 | 2724 | sayYES; |
c277df42 | 2725 | REGCP_UNWIND; |
3280af22 | 2726 | for (n = *PL_reglastparen; n > lastparen; n--) |
cf93c79d | 2727 | PL_regendp[n] = -1; |
3280af22 | 2728 | *PL_reglastparen = n; |
c277df42 | 2729 | scan = next; |
a0d0e21e | 2730 | /*SUPPRESS 560*/ |
c277df42 IZ |
2731 | if (n = (c1 == BRANCH ? NEXT_OFF(next) : ARG(next))) |
2732 | next += n; | |
a0d0e21e | 2733 | else |
c277df42 | 2734 | next = NULL; |
c277df42 IZ |
2735 | inner = NEXTOPER(scan); |
2736 | if (c1 == BRANCHJ) { | |
2737 | inner = NEXTOPER(inner); | |
2738 | } | |
2739 | } while (scan != NULL && OP(scan) == c1); | |
4633a7c4 | 2740 | sayNO; |
a0d0e21e | 2741 | /* NOTREACHED */ |
a687059c | 2742 | } |
a0d0e21e LW |
2743 | } |
2744 | break; | |
2745 | case MINMOD: | |
2746 | minmod = 1; | |
2747 | break; | |
c277df42 IZ |
2748 | case CURLYM: |
2749 | { | |
00db4c45 | 2750 | I32 l = 0; |
c277df42 IZ |
2751 | CHECKPOINT lastcp; |
2752 | ||
2753 | /* We suppose that the next guy does not need | |
2754 | backtracking: in particular, it is of constant length, | |
2755 | and has no parenths to influence future backrefs. */ | |
2756 | ln = ARG1(scan); /* min to match */ | |
2757 | n = ARG2(scan); /* max to match */ | |
c277df42 IZ |
2758 | paren = scan->flags; |
2759 | if (paren) { | |
3280af22 NIS |
2760 | if (paren > PL_regsize) |
2761 | PL_regsize = paren; | |
2762 | if (paren > *PL_reglastparen) | |
2763 | *PL_reglastparen = paren; | |
c277df42 | 2764 | } |
dc45a647 | 2765 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
c277df42 IZ |
2766 | if (paren) |
2767 | scan += NEXT_OFF(scan); /* Skip former OPEN. */ | |
3280af22 | 2768 | PL_reginput = locinput; |
c277df42 IZ |
2769 | if (minmod) { |
2770 | minmod = 0; | |
2771 | if (ln && regrepeat_hard(scan, ln, &l) < ln) | |
2772 | sayNO; | |
5f4b28b2 | 2773 | if (ln && l == 0 && n >= ln |
c277df42 IZ |
2774 | /* In fact, this is tricky. If paren, then the |
2775 | fact that we did/didnot match may influence | |
2776 | future execution. */ | |
2777 | && !(paren && ln == 0)) | |
2778 | ln = n; | |
3280af22 | 2779 | locinput = PL_reginput; |
22c35a8c | 2780 | if (PL_regkind[(U8)OP(next)] == EXACT) { |
cd439c50 | 2781 | c1 = (U8)*STRING(next); |
c277df42 | 2782 | if (OP(next) == EXACTF) |
22c35a8c | 2783 | c2 = PL_fold[c1]; |
c277df42 | 2784 | else if (OP(next) == EXACTFL) |
22c35a8c | 2785 | c2 = PL_fold_locale[c1]; |
c277df42 IZ |
2786 | else |
2787 | c2 = c1; | |
a0ed51b3 LW |
2788 | } |
2789 | else | |
c277df42 IZ |
2790 | c1 = c2 = -1000; |
2791 | REGCP_SET; | |
5f4b28b2 | 2792 | /* This may be improved if l == 0. */ |
c277df42 IZ |
2793 | while (n >= ln || (n == REG_INFTY && ln > 0 && l)) { /* ln overflow ? */ |
2794 | /* If it could work, try it. */ | |
2795 | if (c1 == -1000 || | |
3280af22 NIS |
2796 | UCHARAT(PL_reginput) == c1 || |
2797 | UCHARAT(PL_reginput) == c2) | |
c277df42 IZ |
2798 | { |
2799 | if (paren) { | |
2800 | if (n) { | |
cf93c79d IZ |
2801 | PL_regstartp[paren] = |
2802 | HOPc(PL_reginput, -l) - PL_bostr; | |
2803 | PL_regendp[paren] = PL_reginput - PL_bostr; | |
a0ed51b3 LW |
2804 | } |
2805 | else | |
cf93c79d | 2806 | PL_regendp[paren] = -1; |
c277df42 IZ |
2807 | } |
2808 | if (regmatch(next)) | |
2809 | sayYES; | |
2810 | REGCP_UNWIND; | |
2811 | } | |
2812 | /* Couldn't or didn't -- move forward. */ | |
3280af22 | 2813 | PL_reginput = locinput; |
c277df42 IZ |
2814 | if (regrepeat_hard(scan, 1, &l)) { |
2815 | ln++; | |
3280af22 | 2816 | locinput = PL_reginput; |
c277df42 IZ |
2817 | } |
2818 | else | |
2819 | sayNO; | |
2820 | } | |
a0ed51b3 LW |
2821 | } |
2822 | else { | |
c277df42 IZ |
2823 | n = regrepeat_hard(scan, n, &l); |
2824 | if (n != 0 && l == 0 | |
2825 | /* In fact, this is tricky. If paren, then the | |
2826 | fact that we did/didnot match may influence | |
2827 | future execution. */ | |
2828 | && !(paren && ln == 0)) | |
2829 | ln = n; | |
3280af22 | 2830 | locinput = PL_reginput; |
c277df42 | 2831 | DEBUG_r( |
5c0ca799 | 2832 | PerlIO_printf(Perl_debug_log, |
faccc32b | 2833 | "%*s matched %"IVdf" times, len=%"IVdf"...\n", |
7b0972df | 2834 | (int)(REPORT_CODE_OFF+PL_regindent*2), "", |
faccc32b | 2835 | (IV) n, (IV)l) |
c277df42 IZ |
2836 | ); |
2837 | if (n >= ln) { | |
22c35a8c | 2838 | if (PL_regkind[(U8)OP(next)] == EXACT) { |
cd439c50 | 2839 | c1 = (U8)*STRING(next); |
c277df42 | 2840 | if (OP(next) == EXACTF) |
22c35a8c | 2841 | c2 = PL_fold[c1]; |
c277df42 | 2842 | else if (OP(next) == EXACTFL) |
22c35a8c | 2843 | c2 = PL_fold_locale[c1]; |
c277df42 IZ |
2844 | else |
2845 | c2 = c1; | |
a0ed51b3 LW |
2846 | } |
2847 | else | |
c277df42 IZ |
2848 | c1 = c2 = -1000; |
2849 | } | |
2850 | REGCP_SET; | |
2851 | while (n >= ln) { | |
2852 | /* If it could work, try it. */ | |
2853 | if (c1 == -1000 || | |
3280af22 NIS |
2854 | UCHARAT(PL_reginput) == c1 || |
2855 | UCHARAT(PL_reginput) == c2) | |
a0ed51b3 LW |
2856 | { |
2857 | DEBUG_r( | |
c3464db5 | 2858 | PerlIO_printf(Perl_debug_log, |
7b0972df JH |
2859 | "%*s trying tail with n=%"IVdf"...\n", |
2860 | (int)(REPORT_CODE_OFF+PL_regindent*2), "", (IV)n) | |
a0ed51b3 LW |
2861 | ); |
2862 | if (paren) { | |
2863 | if (n) { | |
cf93c79d IZ |
2864 | PL_regstartp[paren] = HOPc(PL_reginput, -l) - PL_bostr; |
2865 | PL_regendp[paren] = PL_reginput - PL_bostr; | |
c277df42 | 2866 | } |
a0ed51b3 | 2867 | else |
cf93c79d | 2868 | PL_regendp[paren] = -1; |
c277df42 | 2869 | } |
a0ed51b3 LW |
2870 | if (regmatch(next)) |
2871 | sayYES; | |
2872 | REGCP_UNWIND; | |
2873 | } | |
c277df42 IZ |
2874 | /* Couldn't or didn't -- back up. */ |
2875 | n--; | |
dfe13c55 | 2876 | locinput = HOPc(locinput, -l); |
3280af22 | 2877 | PL_reginput = locinput; |
c277df42 IZ |
2878 | } |
2879 | } | |
2880 | sayNO; | |
2881 | break; | |
2882 | } | |
2883 | case CURLYN: | |
2884 | paren = scan->flags; /* Which paren to set */ | |
3280af22 NIS |
2885 | if (paren > PL_regsize) |
2886 | PL_regsize = paren; | |
2887 | if (paren > *PL_reglastparen) | |
2888 | *PL_reglastparen = paren; | |
c277df42 IZ |
2889 | ln = ARG1(scan); /* min to match */ |
2890 | n = ARG2(scan); /* max to match */ | |
dc45a647 | 2891 | scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE); |
c277df42 | 2892 | goto repeat; |
a0d0e21e | 2893 | case CURLY: |
c277df42 | 2894 | paren = 0; |
a0d0e21e LW |
2895 | ln = ARG1(scan); /* min to match */ |
2896 | n = ARG2(scan); /* max to match */ | |
dc45a647 | 2897 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
a0d0e21e LW |
2898 | goto repeat; |
2899 | case STAR: | |
2900 | ln = 0; | |
c277df42 | 2901 | n = REG_INFTY; |
a0d0e21e | 2902 | scan = NEXTOPER(scan); |
c277df42 | 2903 | paren = 0; |
a0d0e21e LW |
2904 | goto repeat; |
2905 | case PLUS: | |
c277df42 IZ |
2906 | ln = 1; |
2907 | n = REG_INFTY; | |
2908 | scan = NEXTOPER(scan); | |
2909 | paren = 0; | |
2910 | repeat: | |
a0d0e21e LW |
2911 | /* |
2912 | * Lookahead to avoid useless match attempts | |
2913 | * when we know what character comes next. | |
2914 | */ | |
22c35a8c | 2915 | if (PL_regkind[(U8)OP(next)] == EXACT) { |
cd439c50 | 2916 | c1 = (U8)*STRING(next); |
bbce6d69 | 2917 | if (OP(next) == EXACTF) |
22c35a8c | 2918 | c2 = PL_fold[c1]; |
bbce6d69 | 2919 | else if (OP(next) == EXACTFL) |
22c35a8c | 2920 | c2 = PL_fold_locale[c1]; |
bbce6d69 | 2921 | else |
2922 | c2 = c1; | |
2923 | } | |
a0d0e21e | 2924 | else |
bbce6d69 | 2925 | c1 = c2 = -1000; |
3280af22 | 2926 | PL_reginput = locinput; |
a0d0e21e | 2927 | if (minmod) { |
c277df42 | 2928 | CHECKPOINT lastcp; |
a0d0e21e LW |
2929 | minmod = 0; |
2930 | if (ln && regrepeat(scan, ln) < ln) | |
4633a7c4 | 2931 | sayNO; |
a0ed51b3 | 2932 | locinput = PL_reginput; |
c277df42 | 2933 | REGCP_SET; |
0fe9bf95 IZ |
2934 | if (c1 != -1000) { |
2935 | char *e = locinput + n - ln; /* Should not check after this */ | |
2936 | char *old = locinput; | |
2937 | ||
2938 | if (e >= PL_regeol || (n == REG_INFTY)) | |
2939 | e = PL_regeol - 1; | |
2940 | while (1) { | |
2941 | /* Find place 'next' could work */ | |
2942 | if (c1 == c2) { | |
2943 | while (locinput <= e && *locinput != c1) | |
2944 | locinput++; | |
2945 | } else { | |
2946 | while (locinput <= e | |
2947 | && *locinput != c1 | |
2948 | && *locinput != c2) | |
2949 | locinput++; | |
2950 | } | |
2951 | if (locinput > e) | |
2952 | sayNO; | |
2953 | /* PL_reginput == old now */ | |
2954 | if (locinput != old) { | |
2955 | ln = 1; /* Did some */ | |
2956 | if (regrepeat(scan, locinput - old) < | |
2957 | locinput - old) | |
2958 | sayNO; | |
2959 | } | |
2960 | /* PL_reginput == locinput now */ | |
2961 | if (paren) { | |
2962 | if (ln) { | |
cf93c79d IZ |
2963 | PL_regstartp[paren] = HOPc(locinput, -1) - PL_bostr; |
2964 | PL_regendp[paren] = locinput - PL_bostr; | |
0fe9bf95 IZ |
2965 | } |
2966 | else | |
cf93c79d | 2967 | PL_regendp[paren] = -1; |
0fe9bf95 IZ |
2968 | } |
2969 | if (regmatch(next)) | |
2970 | sayYES; | |
2971 | PL_reginput = locinput; /* Could be reset... */ | |
2972 | REGCP_UNWIND; | |
2973 | /* Couldn't or didn't -- move forward. */ | |
2974 | old = locinput++; | |
2975 | } | |
2976 | } | |
2977 | else | |
c277df42 | 2978 | while (n >= ln || (n == REG_INFTY && ln > 0)) { /* ln overflow ? */ |
a0d0e21e | 2979 | /* If it could work, try it. */ |
bbce6d69 | 2980 | if (c1 == -1000 || |
3280af22 NIS |
2981 | UCHARAT(PL_reginput) == c1 || |
2982 | UCHARAT(PL_reginput) == c2) | |
bbce6d69 | 2983 | { |
c277df42 IZ |
2984 | if (paren) { |
2985 | if (n) { | |
cf93c79d IZ |
2986 | PL_regstartp[paren] = HOPc(PL_reginput, -1) - PL_bostr; |
2987 | PL_regendp[paren] = PL_reginput - PL_bostr; | |
a0ed51b3 LW |
2988 | } |
2989 | else | |
cf93c79d | 2990 | PL_regendp[paren] = -1; |
c277df42 | 2991 | } |
a0d0e21e | 2992 | if (regmatch(next)) |
4633a7c4 | 2993 | sayYES; |
c277df42 | 2994 | REGCP_UNWIND; |
bbce6d69 | 2995 | } |
c277df42 | 2996 | /* Couldn't or didn't -- move forward. */ |
a0ed51b3 | 2997 | PL_reginput = locinput; |
a0d0e21e LW |
2998 | if (regrepeat(scan, 1)) { |
2999 | ln++; | |
a0ed51b3 LW |
3000 | locinput = PL_reginput; |
3001 | } | |
3002 | else | |
4633a7c4 | 3003 | sayNO; |
a0d0e21e LW |
3004 | } |
3005 | } | |
3006 | else { | |
c277df42 | 3007 | CHECKPOINT lastcp; |
a0d0e21e | 3008 | n = regrepeat(scan, n); |
a0ed51b3 | 3009 | locinput = PL_reginput; |
22c35a8c | 3010 | if (ln < n && PL_regkind[(U8)OP(next)] == EOL && |
3280af22 | 3011 | (!PL_multiline || OP(next) == SEOL)) |
a0d0e21e | 3012 | ln = n; /* why back off? */ |
c277df42 IZ |
3013 | REGCP_SET; |
3014 | if (paren) { | |
3015 | while (n >= ln) { | |
3016 | /* If it could work, try it. */ | |
3017 | if (c1 == -1000 || | |
3280af22 NIS |
3018 | UCHARAT(PL_reginput) == c1 || |
3019 | UCHARAT(PL_reginput) == c2) | |
c277df42 IZ |
3020 | { |
3021 | if (paren && n) { | |
3022 | if (n) { | |
cf93c79d IZ |
3023 | PL_regstartp[paren] = HOPc(PL_reginput, -1) - PL_bostr; |
3024 | PL_regendp[paren] = PL_reginput - PL_bostr; | |
a0ed51b3 LW |
3025 | } |
3026 | else | |
cf93c79d | 3027 | PL_regendp[paren] = -1; |
c277df42 IZ |
3028 | } |
3029 | if (regmatch(next)) | |
3030 | sayYES; | |
3031 | REGCP_UNWIND; | |
3032 | } | |
3033 | /* Couldn't or didn't -- back up. */ | |
3034 | n--; | |
dfe13c55 | 3035 | PL_reginput = locinput = HOPc(locinput, -1); |
c277df42 | 3036 | } |
a0ed51b3 LW |
3037 | } |
3038 | else { | |
c277df42 IZ |
3039 | while (n >= ln) { |
3040 | /* If it could work, try it. */ | |
3041 | if (c1 == -1000 || | |
3280af22 NIS |
3042 | UCHARAT(PL_reginput) == c1 || |
3043 | UCHARAT(PL_reginput) == c2) | |
c277df42 IZ |
3044 | { |
3045 | if (regmatch(next)) | |
3046 | sayYES; | |
3047 | REGCP_UNWIND; | |
3048 | } | |
3049 | /* Couldn't or didn't -- back up. */ | |
3050 | n--; | |
dfe13c55 | 3051 | PL_reginput = locinput = HOPc(locinput, -1); |
bbce6d69 | 3052 | } |
a0d0e21e LW |
3053 | } |
3054 | } | |
4633a7c4 | 3055 | sayNO; |
c277df42 | 3056 | break; |
a0d0e21e | 3057 | case END: |
0f5d15d6 IZ |
3058 | if (PL_reg_call_cc) { |
3059 | re_cc_state *cur_call_cc = PL_reg_call_cc; | |
3060 | CURCUR *cctmp = PL_regcc; | |
3061 | regexp *re = PL_reg_re; | |
3062 | CHECKPOINT cp, lastcp; | |
3063 | ||
3064 | cp = regcppush(0); /* Save *all* the positions. */ | |
3065 | REGCP_SET; | |
3066 | regcp_set_to(PL_reg_call_cc->ss); /* Restore parens of | |
3067 | the caller. */ | |
3068 | PL_reginput = locinput; /* Make position available to | |
3069 | the callcc. */ | |
3070 | cache_re(PL_reg_call_cc->re); | |
3071 | PL_regcc = PL_reg_call_cc->cc; | |
3072 | PL_reg_call_cc = PL_reg_call_cc->prev; | |
3073 | if (regmatch(cur_call_cc->node)) { | |
3074 | PL_reg_call_cc = cur_call_cc; | |
3075 | regcpblow(cp); | |
3076 | sayYES; | |
3077 | } | |
3078 | REGCP_UNWIND; | |
3079 | regcppop(); | |
3080 | PL_reg_call_cc = cur_call_cc; | |
3081 | PL_regcc = cctmp; | |
3082 | PL_reg_re = re; | |
3083 | cache_re(re); | |
3084 | ||
3085 | DEBUG_r( | |
3086 | PerlIO_printf(Perl_debug_log, | |
3087 | "%*s continuation failed...\n", | |
3088 | REPORT_CODE_OFF+PL_regindent*2, "") | |
3089 | ); | |
7821416a | 3090 | sayNO_SILENT; |
0f5d15d6 | 3091 | } |
7821416a IZ |
3092 | if (locinput < PL_regtill) { |
3093 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
3094 | "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n", | |
3095 | PL_colors[4], | |
3096 | (long)(locinput - PL_reg_starttry), | |
3097 | (long)(PL_regtill - PL_reg_starttry), | |
3098 | PL_colors[5])); | |
3099 | sayNO_FINAL; /* Cannot match: too short. */ | |
3100 | } | |
3101 | PL_reginput = locinput; /* put where regtry can find it */ | |
3102 | sayYES_FINAL; /* Success! */ | |
7e5428c5 | 3103 | case SUCCEED: |
3280af22 | 3104 | PL_reginput = locinput; /* put where regtry can find it */ |
7821416a | 3105 | sayYES_LOUD; /* Success! */ |
c277df42 IZ |
3106 | case SUSPEND: |
3107 | n = 1; | |
9fe1d20c | 3108 | PL_reginput = locinput; |
c277df42 | 3109 | goto do_ifmatch; |
a0d0e21e | 3110 | case UNLESSM: |
c277df42 | 3111 | n = 0; |
a0ed51b3 | 3112 | if (scan->flags) { |
0fe9bf95 IZ |
3113 | if (UTF) { /* XXXX This is absolutely |
3114 | broken, we read before | |
3115 | start of string. */ | |
3116 | s = HOPMAYBEc(locinput, -scan->flags); | |
3117 | if (!s) | |
3118 | goto say_yes; | |
3119 | PL_reginput = s; | |
3120 | } | |
3121 | else { | |
3122 | if (locinput < PL_bostr + scan->flags) | |
3123 | goto say_yes; | |
3124 | PL_reginput = locinput - scan->flags; | |
3125 | goto do_ifmatch; | |
3126 | } | |
a0ed51b3 LW |
3127 | } |
3128 | else | |
3129 | PL_reginput = locinput; | |
c277df42 IZ |
3130 | goto do_ifmatch; |
3131 | case IFMATCH: | |
3132 | n = 1; | |
a0ed51b3 | 3133 | if (scan->flags) { |
0fe9bf95 IZ |
3134 | if (UTF) { /* XXXX This is absolutely |
3135 | broken, we read before | |
3136 | start of string. */ | |
3137 | s = HOPMAYBEc(locinput, -scan->flags); | |
3138 | if (!s || s < PL_bostr) | |
3139 | goto say_no; | |
3140 | PL_reginput = s; | |
3141 | } | |
3142 | else { | |
3143 | if (locinput < PL_bostr + scan->flags) | |
3144 | goto say_no; | |
3145 | PL_reginput = locinput - scan->flags; | |
3146 | goto do_ifmatch; | |
3147 | } | |
a0ed51b3 LW |
3148 | } |
3149 | else | |
3150 | PL_reginput = locinput; | |
3151 | ||
c277df42 | 3152 | do_ifmatch: |
c277df42 IZ |
3153 | inner = NEXTOPER(NEXTOPER(scan)); |
3154 | if (regmatch(inner) != n) { | |
3155 | say_no: | |
3156 | if (logical) { | |
3157 | logical = 0; | |
3158 | sw = 0; | |
3159 | goto do_longjump; | |
a0ed51b3 LW |
3160 | } |
3161 | else | |
c277df42 IZ |
3162 | sayNO; |
3163 | } | |
3164 | say_yes: | |
3165 | if (logical) { | |
3166 | logical = 0; | |
3167 | sw = 1; | |
3168 | } | |
fe44a5e8 | 3169 | if (OP(scan) == SUSPEND) { |
3280af22 | 3170 | locinput = PL_reginput; |
565764a8 | 3171 | nextchr = UCHARAT(locinput); |
fe44a5e8 | 3172 | } |
c277df42 IZ |
3173 | /* FALL THROUGH. */ |
3174 | case LONGJMP: | |
3175 | do_longjump: | |
3176 | next = scan + ARG(scan); | |
3177 | if (next == scan) | |
3178 | next = NULL; | |
a0d0e21e LW |
3179 | break; |
3180 | default: | |
b900a521 | 3181 | PerlIO_printf(Perl_error_log, "%"UVxf" %d\n", |
d7d93a81 | 3182 | PTR2UV(scan), OP(scan)); |
cea2e8a9 | 3183 | Perl_croak(aTHX_ "regexp memory corruption"); |
a687059c | 3184 | } |
a0d0e21e LW |
3185 | scan = next; |
3186 | } | |
a687059c | 3187 | |
a0d0e21e LW |
3188 | /* |
3189 | * We get here only if there's trouble -- normally "case END" is | |
3190 | * the terminating point. | |
3191 | */ | |
cea2e8a9 | 3192 | Perl_croak(aTHX_ "corrupted regexp pointers"); |
a0d0e21e | 3193 | /*NOTREACHED*/ |
4633a7c4 LW |
3194 | sayNO; |
3195 | ||
7821416a IZ |
3196 | yes_loud: |
3197 | DEBUG_r( | |
3198 | PerlIO_printf(Perl_debug_log, | |
3199 | "%*s %scould match...%s\n", | |
3200 | REPORT_CODE_OFF+PL_regindent*2, "", PL_colors[4],PL_colors[5]) | |
3201 | ); | |
3202 | goto yes; | |
3203 | yes_final: | |
3204 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n", | |
3205 | PL_colors[4],PL_colors[5])); | |
4633a7c4 LW |
3206 | yes: |
3207 | #ifdef DEBUGGING | |
3280af22 | 3208 | PL_regindent--; |
4633a7c4 LW |
3209 | #endif |
3210 | return 1; | |
3211 | ||
3212 | no: | |
7821416a IZ |
3213 | DEBUG_r( |
3214 | PerlIO_printf(Perl_debug_log, | |
3215 | "%*s %sfailed...%s\n", | |
3216 | REPORT_CODE_OFF+PL_regindent*2, "",PL_colors[4],PL_colors[5]) | |
3217 | ); | |
3218 | goto do_no; | |
3219 | no_final: | |
3220 | do_no: | |
4633a7c4 | 3221 | #ifdef DEBUGGING |
3280af22 | 3222 | PL_regindent--; |
4633a7c4 | 3223 | #endif |
a0d0e21e | 3224 | return 0; |
a687059c LW |
3225 | } |
3226 | ||
3227 | /* | |
3228 | - regrepeat - repeatedly match something simple, report how many | |
3229 | */ | |
3230 | /* | |
3231 | * [This routine now assumes that it will only match on things of length 1. | |
3232 | * That was true before, but now we assume scan - reginput is the count, | |
a0ed51b3 | 3233 | * rather than incrementing count on every character. [Er, except utf8.]] |
a687059c | 3234 | */ |
76e3520e | 3235 | STATIC I32 |
cea2e8a9 | 3236 | S_regrepeat(pTHX_ regnode *p, I32 max) |
a687059c | 3237 | { |
5c0ca799 | 3238 | dTHR; |
a0d0e21e | 3239 | register char *scan; |
a0d0e21e | 3240 | register I32 c; |
3280af22 | 3241 | register char *loceol = PL_regeol; |
a0ed51b3 | 3242 | register I32 hardcount = 0; |
a0d0e21e | 3243 | |
3280af22 | 3244 | scan = PL_reginput; |
c277df42 | 3245 | if (max != REG_INFTY && max < loceol - scan) |
a0d0e21e | 3246 | loceol = scan + max; |
a0d0e21e | 3247 | switch (OP(p)) { |
22c35a8c | 3248 | case REG_ANY: |
a0d0e21e LW |
3249 | while (scan < loceol && *scan != '\n') |
3250 | scan++; | |
3251 | break; | |
3252 | case SANY: | |
3253 | scan = loceol; | |
3254 | break; | |
a0ed51b3 LW |
3255 | case ANYUTF8: |
3256 | loceol = PL_regeol; | |
3257 | while (scan < loceol && *scan != '\n') { | |
3258 | scan += UTF8SKIP(scan); | |
3259 | hardcount++; | |
3260 | } | |
3261 | break; | |
3262 | case SANYUTF8: | |
3263 | loceol = PL_regeol; | |
3264 | while (scan < loceol) { | |
3265 | scan += UTF8SKIP(scan); | |
3266 | hardcount++; | |
3267 | } | |
3268 | break; | |
bbce6d69 | 3269 | case EXACT: /* length of string is 1 */ |
cd439c50 | 3270 | c = (U8)*STRING(p); |
bbce6d69 | 3271 | while (scan < loceol && UCHARAT(scan) == c) |
3272 | scan++; | |
3273 | break; | |
3274 | case EXACTF: /* length of string is 1 */ | |
cd439c50 | 3275 | c = (U8)*STRING(p); |
bbce6d69 | 3276 | while (scan < loceol && |
22c35a8c | 3277 | (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c])) |
bbce6d69 | 3278 | scan++; |
3279 | break; | |
3280 | case EXACTFL: /* length of string is 1 */ | |
3280af22 | 3281 | PL_reg_flags |= RF_tainted; |
cd439c50 | 3282 | c = (U8)*STRING(p); |
bbce6d69 | 3283 | while (scan < loceol && |
22c35a8c | 3284 | (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c])) |
a0d0e21e LW |
3285 | scan++; |
3286 | break; | |
a0ed51b3 LW |
3287 | case ANYOFUTF8: |
3288 | loceol = PL_regeol; | |
3289 | while (scan < loceol && REGINCLASSUTF8(p, (U8*)scan)) { | |
3290 | scan += UTF8SKIP(scan); | |
3291 | hardcount++; | |
3292 | } | |
3293 | break; | |
a0d0e21e | 3294 | case ANYOF: |
936ed897 | 3295 | while (scan < loceol && REGINCLASS(p, *scan)) |
a0d0e21e | 3296 | scan++; |
a0d0e21e LW |
3297 | break; |
3298 | case ALNUM: | |
3299 | while (scan < loceol && isALNUM(*scan)) | |
3300 | scan++; | |
3301 | break; | |
a0ed51b3 LW |
3302 | case ALNUMUTF8: |
3303 | loceol = PL_regeol; | |
dfe13c55 | 3304 | while (scan < loceol && swash_fetch(PL_utf8_alnum, (U8*)scan)) { |
a0ed51b3 LW |
3305 | scan += UTF8SKIP(scan); |
3306 | hardcount++; | |
3307 | } | |
3308 | break; | |
bbce6d69 | 3309 | case ALNUML: |
3280af22 | 3310 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 3311 | while (scan < loceol && isALNUM_LC(*scan)) |
3312 | scan++; | |
3313 | break; | |
a0ed51b3 LW |
3314 | case ALNUMLUTF8: |
3315 | PL_reg_flags |= RF_tainted; | |
3316 | loceol = PL_regeol; | |
dfe13c55 | 3317 | while (scan < loceol && isALNUM_LC_utf8((U8*)scan)) { |
a0ed51b3 LW |
3318 | scan += UTF8SKIP(scan); |
3319 | hardcount++; | |
3320 | } | |
3321 | break; | |
3322 | break; | |
a0d0e21e LW |
3323 | case NALNUM: |
3324 | while (scan < loceol && !isALNUM(*scan)) | |
3325 | scan++; | |
3326 | break; | |
a0ed51b3 LW |
3327 | case NALNUMUTF8: |
3328 | loceol = PL_regeol; | |
dfe13c55 | 3329 | while (scan < loceol && !swash_fetch(PL_utf8_alnum, (U8*)scan)) { |
a0ed51b3 LW |
3330 | scan += UTF8SKIP(scan); |
3331 | hardcount++; | |
3332 | } | |
3333 | break; | |
bbce6d69 | 3334 | case NALNUML: |
3280af22 | 3335 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 3336 | while (scan < loceol && !isALNUM_LC(*scan)) |
3337 | scan++; | |
3338 | break; | |
a0ed51b3 LW |
3339 | case NALNUMLUTF8: |
3340 | PL_reg_flags |= RF_tainted; | |
3341 | loceol = PL_regeol; | |
dfe13c55 | 3342 | while (scan < loceol && !isALNUM_LC_utf8((U8*)scan)) { |
a0ed51b3 LW |
3343 | scan += UTF8SKIP(scan); |
3344 | hardcount++; | |
3345 | } | |
3346 | break; | |
a0d0e21e LW |
3347 | case SPACE: |
3348 | while (scan < loceol && isSPACE(*scan)) | |
3349 | scan++; | |
3350 | break; | |
a0ed51b3 LW |
3351 | case SPACEUTF8: |
3352 | loceol = PL_regeol; | |
dfe13c55 | 3353 | while (scan < loceol && (*scan == ' ' || swash_fetch(PL_utf8_space,(U8*)scan))) { |
a0ed51b3 LW |
3354 | scan += UTF8SKIP(scan); |
3355 | hardcount++; | |
3356 | } | |
3357 | break; | |
bbce6d69 | 3358 | case SPACEL: |
3280af22 | 3359 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 3360 | while (scan < loceol && isSPACE_LC(*scan)) |
3361 | scan++; | |
3362 | break; | |
a0ed51b3 LW |
3363 | case SPACELUTF8: |
3364 | PL_reg_flags |= RF_tainted; | |
3365 | loceol = PL_regeol; | |
dfe13c55 | 3366 | while (scan < loceol && (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
a0ed51b3 LW |
3367 | scan += UTF8SKIP(scan); |
3368 | hardcount++; | |
3369 | } | |
3370 | break; | |
a0d0e21e LW |
3371 | case NSPACE: |
3372 | while (scan < loceol && !isSPACE(*scan)) | |
3373 | scan++; | |
3374 | break; | |
a0ed51b3 LW |
3375 | case NSPACEUTF8: |
3376 | loceol = PL_regeol; | |
dfe13c55 | 3377 | while (scan < loceol && !(*scan == ' ' || swash_fetch(PL_utf8_space,(U8*)scan))) { |
a0ed51b3 LW |
3378 | scan += UTF8SKIP(scan); |
3379 | hardcount++; | |
3380 | } | |
3381 | break; | |
bbce6d69 | 3382 | case NSPACEL: |
3280af22 | 3383 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 3384 | while (scan < loceol && !isSPACE_LC(*scan)) |
3385 | scan++; | |
3386 | break; | |
a0ed51b3 LW |
3387 | case NSPACELUTF8: |
3388 | PL_reg_flags |= RF_tainted; | |
3389 | loceol = PL_regeol; | |
dfe13c55 | 3390 | while (scan < loceol && !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
a0ed51b3 LW |
3391 | scan += UTF8SKIP(scan); |
3392 | hardcount++; | |
3393 | } | |
3394 | break; | |
a0d0e21e LW |
3395 | case DIGIT: |
3396 | while (scan < loceol && isDIGIT(*scan)) | |
3397 | scan++; | |
3398 | break; | |
a0ed51b3 LW |
3399 | case DIGITUTF8: |
3400 | loceol = PL_regeol; | |
dfe13c55 | 3401 | while (scan < loceol && swash_fetch(PL_utf8_digit,(U8*)scan)) { |
a0ed51b3 LW |
3402 | scan += UTF8SKIP(scan); |
3403 | hardcount++; | |
3404 | } | |
3405 | break; | |
3406 | break; | |
a0d0e21e LW |
3407 | case NDIGIT: |
3408 | while (scan < loceol && !isDIGIT(*scan)) | |
3409 | scan++; | |
3410 | break; | |
a0ed51b3 LW |
3411 | case NDIGITUTF8: |
3412 | loceol = PL_regeol; | |
dfe13c55 | 3413 | while (scan < loceol && !swash_fetch(PL_utf8_digit,(U8*)scan)) { |
a0ed51b3 LW |
3414 | scan += UTF8SKIP(scan); |
3415 | hardcount++; | |
3416 | } | |
3417 | break; | |
a0d0e21e LW |
3418 | default: /* Called on something of 0 width. */ |
3419 | break; /* So match right here or not at all. */ | |
3420 | } | |
a687059c | 3421 | |
a0ed51b3 LW |
3422 | if (hardcount) |
3423 | c = hardcount; | |
3424 | else | |
3425 | c = scan - PL_reginput; | |
3280af22 | 3426 | PL_reginput = scan; |
a687059c | 3427 | |
c277df42 IZ |
3428 | DEBUG_r( |
3429 | { | |
3430 | SV *prop = sv_newmortal(); | |
3431 | ||
3432 | regprop(prop, p); | |
3433 | PerlIO_printf(Perl_debug_log, | |
7b0972df JH |
3434 | "%*s %s can match %"IVdf" times out of %"IVdf"...\n", |
3435 | REPORT_CODE_OFF+1, "", SvPVX(prop),(IV)c,(IV)max); | |
c277df42 IZ |
3436 | }); |
3437 | ||
a0d0e21e | 3438 | return(c); |
a687059c LW |
3439 | } |
3440 | ||
3441 | /* | |
c277df42 IZ |
3442 | - regrepeat_hard - repeatedly match something, report total lenth and length |
3443 | * | |
3444 | * The repeater is supposed to have constant length. | |
3445 | */ | |
3446 | ||
76e3520e | 3447 | STATIC I32 |
cea2e8a9 | 3448 | S_regrepeat_hard(pTHX_ regnode *p, I32 max, I32 *lp) |
c277df42 | 3449 | { |
5c0ca799 | 3450 | dTHR; |
c277df42 IZ |
3451 | register char *scan; |
3452 | register char *start; | |
3280af22 | 3453 | register char *loceol = PL_regeol; |
a0ed51b3 | 3454 | I32 l = 0; |
708e3b05 | 3455 | I32 count = 0, res = 1; |
a0ed51b3 LW |
3456 | |
3457 | if (!max) | |
3458 | return 0; | |
c277df42 | 3459 | |
3280af22 | 3460 | start = PL_reginput; |
a0ed51b3 | 3461 | if (UTF) { |
708e3b05 | 3462 | while (PL_reginput < loceol && (scan = PL_reginput, res = regmatch(p))) { |
a0ed51b3 LW |
3463 | if (!count++) { |
3464 | l = 0; | |
3465 | while (start < PL_reginput) { | |
3466 | l++; | |
3467 | start += UTF8SKIP(start); | |
3468 | } | |
3469 | *lp = l; | |
3470 | if (l == 0) | |
3471 | return max; | |
3472 | } | |
3473 | if (count == max) | |
3474 | return count; | |
3475 | } | |
3476 | } | |
3477 | else { | |
708e3b05 | 3478 | while (PL_reginput < loceol && (scan = PL_reginput, res = regmatch(p))) { |
a0ed51b3 LW |
3479 | if (!count++) { |
3480 | *lp = l = PL_reginput - start; | |
3481 | if (max != REG_INFTY && l*max < loceol - scan) | |
3482 | loceol = scan + l*max; | |
3483 | if (l == 0) | |
3484 | return max; | |
c277df42 IZ |
3485 | } |
3486 | } | |
3487 | } | |
708e3b05 | 3488 | if (!res) |
3280af22 | 3489 | PL_reginput = scan; |
c277df42 | 3490 | |
a0ed51b3 | 3491 | return count; |
c277df42 IZ |
3492 | } |
3493 | ||
3494 | /* | |
cb8d8820 | 3495 | - reginclass - determine if a character falls into a character class |
bbce6d69 | 3496 | */ |
3497 | ||
76e3520e | 3498 | STATIC bool |
936ed897 | 3499 | S_reginclass(pTHX_ register regnode *p, register I32 c) |
bbce6d69 | 3500 | { |
5c0ca799 | 3501 | dTHR; |
b8c5462f | 3502 | char flags = ANYOF_FLAGS(p); |
bbce6d69 | 3503 | bool match = FALSE; |
3504 | ||
3505 | c &= 0xFF; | |
b8c5462f | 3506 | if (ANYOF_BITMAP_TEST(p, c)) |
bbce6d69 | 3507 | match = TRUE; |
3508 | else if (flags & ANYOF_FOLD) { | |
3509 | I32 cf; | |
3510 | if (flags & ANYOF_LOCALE) { | |
3280af22 | 3511 | PL_reg_flags |= RF_tainted; |
22c35a8c | 3512 | cf = PL_fold_locale[c]; |
bbce6d69 | 3513 | } |
3514 | else | |
22c35a8c | 3515 | cf = PL_fold[c]; |
b8c5462f | 3516 | if (ANYOF_BITMAP_TEST(p, cf)) |
bbce6d69 | 3517 | match = TRUE; |
3518 | } | |
3519 | ||
b8c5462f | 3520 | if (!match && (flags & ANYOF_CLASS)) { |
3280af22 | 3521 | PL_reg_flags |= RF_tainted; |
b8c5462f JH |
3522 | if ( |
3523 | (ANYOF_CLASS_TEST(p, ANYOF_ALNUM) && isALNUM_LC(c)) || | |
3524 | (ANYOF_CLASS_TEST(p, ANYOF_NALNUM) && !isALNUM_LC(c)) || | |
3525 | (ANYOF_CLASS_TEST(p, ANYOF_SPACE) && isSPACE_LC(c)) || | |
3526 | (ANYOF_CLASS_TEST(p, ANYOF_NSPACE) && !isSPACE_LC(c)) || | |
3527 | (ANYOF_CLASS_TEST(p, ANYOF_DIGIT) && isDIGIT_LC(c)) || | |
3528 | (ANYOF_CLASS_TEST(p, ANYOF_NDIGIT) && !isDIGIT_LC(c)) || | |
3529 | (ANYOF_CLASS_TEST(p, ANYOF_ALNUMC) && isALNUMC_LC(c)) || | |
3530 | (ANYOF_CLASS_TEST(p, ANYOF_NALNUMC) && !isALNUMC_LC(c)) || | |
3531 | (ANYOF_CLASS_TEST(p, ANYOF_ALPHA) && isALPHA_LC(c)) || | |
3532 | (ANYOF_CLASS_TEST(p, ANYOF_NALPHA) && !isALPHA_LC(c)) || | |
3533 | (ANYOF_CLASS_TEST(p, ANYOF_ASCII) && isASCII(c)) || | |
3534 | (ANYOF_CLASS_TEST(p, ANYOF_NASCII) && !isASCII(c)) || | |
3535 | (ANYOF_CLASS_TEST(p, ANYOF_CNTRL) && isCNTRL_LC(c)) || | |
3536 | (ANYOF_CLASS_TEST(p, ANYOF_NCNTRL) && !isCNTRL_LC(c)) || | |
3537 | (ANYOF_CLASS_TEST(p, ANYOF_GRAPH) && isGRAPH_LC(c)) || | |
3538 | (ANYOF_CLASS_TEST(p, ANYOF_NGRAPH) && !isGRAPH_LC(c)) || | |
3539 | (ANYOF_CLASS_TEST(p, ANYOF_LOWER) && isLOWER_LC(c)) || | |
3540 | (ANYOF_CLASS_TEST(p, ANYOF_NLOWER) && !isLOWER_LC(c)) || | |
3541 | (ANYOF_CLASS_TEST(p, ANYOF_PRINT) && isPRINT_LC(c)) || | |
3542 | (ANYOF_CLASS_TEST(p, ANYOF_NPRINT) && !isPRINT_LC(c)) || | |
3543 | (ANYOF_CLASS_TEST(p, ANYOF_PUNCT) && isPUNCT_LC(c)) || | |
3544 | (ANYOF_CLASS_TEST(p, ANYOF_NPUNCT) && !isPUNCT_LC(c)) || | |
3545 | (ANYOF_CLASS_TEST(p, ANYOF_UPPER) && isUPPER_LC(c)) || | |
3546 | (ANYOF_CLASS_TEST(p, ANYOF_NUPPER) && !isUPPER_LC(c)) || | |
3547 | (ANYOF_CLASS_TEST(p, ANYOF_XDIGIT) && isXDIGIT(c)) || | |
3548 | (ANYOF_CLASS_TEST(p, ANYOF_NXDIGIT) && !isXDIGIT(c)) | |
3549 | ) /* How's that for a conditional? */ | |
bbce6d69 | 3550 | { |
3551 | match = TRUE; | |
3552 | } | |
3553 | } | |
3554 | ||
ae5c130c | 3555 | return (flags & ANYOF_INVERT) ? !match : match; |
bbce6d69 | 3556 | } |
3557 | ||
a0ed51b3 | 3558 | STATIC bool |
cea2e8a9 | 3559 | S_reginclassutf8(pTHX_ regnode *f, U8 *p) |
c485e607 NIS |
3560 | { |
3561 | dTHR; | |
a0ed51b3 LW |
3562 | char flags = ARG1(f); |
3563 | bool match = FALSE; | |
3564 | SV *sv = (SV*)PL_regdata->data[ARG2(f)]; | |
3565 | ||
3566 | if (swash_fetch(sv, p)) | |
3567 | match = TRUE; | |
3568 | else if (flags & ANYOF_FOLD) { | |
3569 | I32 cf; | |
dfe13c55 | 3570 | U8 tmpbuf[10]; |
a0ed51b3 LW |
3571 | if (flags & ANYOF_LOCALE) { |
3572 | PL_reg_flags |= RF_tainted; | |
3573 | uv_to_utf8(tmpbuf, toLOWER_LC_utf8(p)); | |
3574 | } | |
3575 | else | |
3576 | uv_to_utf8(tmpbuf, toLOWER_utf8(p)); | |
3577 | if (swash_fetch(sv, tmpbuf)) | |
3578 | match = TRUE; | |
3579 | } | |
3580 | ||
b8c5462f | 3581 | /* UTF8 combined with ANYOF_CLASS is ill-defined. */ |
a0ed51b3 LW |
3582 | |
3583 | return (flags & ANYOF_INVERT) ? !match : match; | |
3584 | } | |
161b471a | 3585 | |
dfe13c55 | 3586 | STATIC U8 * |
cea2e8a9 | 3587 | S_reghop(pTHX_ U8 *s, I32 off) |
c485e607 NIS |
3588 | { |
3589 | dTHR; | |
a0ed51b3 LW |
3590 | if (off >= 0) { |
3591 | while (off-- && s < (U8*)PL_regeol) | |
3592 | s += UTF8SKIP(s); | |
3593 | } | |
3594 | else { | |
3595 | while (off++) { | |
3596 | if (s > (U8*)PL_bostr) { | |
3597 | s--; | |
3598 | if (*s & 0x80) { | |
3599 | while (s > (U8*)PL_bostr && (*s & 0xc0) == 0x80) | |
3600 | s--; | |
3601 | } /* XXX could check well-formedness here */ | |
3602 | } | |
3603 | } | |
3604 | } | |
3605 | return s; | |
3606 | } | |
161b471a | 3607 | |
dfe13c55 | 3608 | STATIC U8 * |
cea2e8a9 | 3609 | S_reghopmaybe(pTHX_ U8* s, I32 off) |
a0ed51b3 | 3610 | { |
c485e607 | 3611 | dTHR; |
a0ed51b3 LW |
3612 | if (off >= 0) { |
3613 | while (off-- && s < (U8*)PL_regeol) | |
3614 | s += UTF8SKIP(s); | |
3615 | if (off >= 0) | |
3616 | return 0; | |
3617 | } | |
3618 | else { | |
3619 | while (off++) { | |
3620 | if (s > (U8*)PL_bostr) { | |
3621 | s--; | |
3622 | if (*s & 0x80) { | |
3623 | while (s > (U8*)PL_bostr && (*s & 0xc0) == 0x80) | |
3624 | s--; | |
3625 | } /* XXX could check well-formedness here */ | |
3626 | } | |
3627 | else | |
3628 | break; | |
3629 | } | |
3630 | if (off <= 0) | |
3631 | return 0; | |
3632 | } | |
3633 | return s; | |
3634 | } | |
51371543 GS |
3635 | |
3636 | #ifdef PERL_OBJECT | |
51371543 GS |
3637 | #include "XSUB.h" |
3638 | #endif | |
3639 | ||
3640 | static void | |
3641 | restore_pos(pTHXo_ void *arg) | |
3642 | { | |
3643 | dTHR; | |
3644 | if (PL_reg_eval_set) { | |
3645 | if (PL_reg_oldsaved) { | |
3646 | PL_reg_re->subbeg = PL_reg_oldsaved; | |
3647 | PL_reg_re->sublen = PL_reg_oldsavedlen; | |
3648 | RX_MATCH_COPIED_on(PL_reg_re); | |
3649 | } | |
3650 | PL_reg_magic->mg_len = PL_reg_oldpos; | |
3651 | PL_reg_eval_set = 0; | |
3652 | PL_curpm = PL_reg_oldcurpm; | |
3653 | } | |
3654 | } | |
3655 |