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 | |
9041c2e3 | 41 | # define Perl_reginitcolors my_reginitcolors |
490a3f88 | 42 | # define Perl_regclass_swash my_regclass_swash |
c5be433b GS |
43 | |
44 | # define PERL_NO_GET_CONTEXT | |
9041c2e3 | 45 | #endif |
56953603 | 46 | |
f0fcb552 | 47 | /*SUPPRESS 112*/ |
a687059c | 48 | /* |
e50aee73 | 49 | * pregcomp and pregexec -- regsub and regerror are not used in perl |
a687059c LW |
50 | * |
51 | * Copyright (c) 1986 by University of Toronto. | |
52 | * Written by Henry Spencer. Not derived from licensed software. | |
53 | * | |
54 | * Permission is granted to anyone to use this software for any | |
55 | * purpose on any computer system, and to redistribute it freely, | |
56 | * subject to the following restrictions: | |
57 | * | |
58 | * 1. The author is not responsible for the consequences of use of | |
59 | * this software, no matter how awful, even if they arise | |
60 | * from defects in it. | |
61 | * | |
62 | * 2. The origin of this software must not be misrepresented, either | |
63 | * by explicit claim or by omission. | |
64 | * | |
65 | * 3. Altered versions must be plainly marked as such, and must not | |
66 | * be misrepresented as being the original software. | |
67 | * | |
68 | **** Alterations to Henry's code are... | |
69 | **** | |
bc89e66f | 70 | **** Copyright (c) 1991-2001, Larry Wall |
a687059c | 71 | **** |
9ef589d8 LW |
72 | **** You may distribute under the terms of either the GNU General Public |
73 | **** License or the Artistic License, as specified in the README file. | |
a687059c LW |
74 | * |
75 | * Beware that some of this code is subtly aware of the way operator | |
76 | * precedence is structured in regular expressions. Serious changes in | |
77 | * regular-expression syntax might require a total rethink. | |
78 | */ | |
79 | #include "EXTERN.h" | |
864dbfa3 | 80 | #define PERL_IN_REGEXEC_C |
a687059c | 81 | #include "perl.h" |
0f5d15d6 | 82 | |
a687059c LW |
83 | #include "regcomp.h" |
84 | ||
c277df42 IZ |
85 | #define RF_tainted 1 /* tainted information used? */ |
86 | #define RF_warned 2 /* warned about big count? */ | |
ce862d02 | 87 | #define RF_evaled 4 /* Did an EVAL with setting? */ |
a0ed51b3 LW |
88 | #define RF_utf8 8 /* String contains multibyte chars? */ |
89 | ||
90 | #define UTF (PL_reg_flags & RF_utf8) | |
ce862d02 IZ |
91 | |
92 | #define RS_init 1 /* eval environment created */ | |
93 | #define RS_set 2 /* replsv value is set */ | |
c277df42 | 94 | |
a687059c LW |
95 | #ifndef STATIC |
96 | #define STATIC static | |
97 | #endif | |
98 | ||
c277df42 IZ |
99 | /* |
100 | * Forwards. | |
101 | */ | |
102 | ||
a0ed51b3 | 103 | #define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv)) |
53c4c00c | 104 | #define CHR_DIST(a,b) (PL_reg_match_utf8 ? utf8_distance(a,b) : a - b) |
a0ed51b3 | 105 | |
dfe13c55 GS |
106 | #define reghop_c(pos,off) ((char*)reghop((U8*)pos, off)) |
107 | #define reghopmaybe_c(pos,off) ((char*)reghopmaybe((U8*)pos, off)) | |
53c4c00c JH |
108 | #define HOP(pos,off) (PL_reg_match_utf8 ? reghop((U8*)pos, off) : (U8*)(pos + off)) |
109 | #define HOPMAYBE(pos,off) (PL_reg_match_utf8 ? reghopmaybe((U8*)pos, off) : (U8*)(pos + off)) | |
dfe13c55 GS |
110 | #define HOPc(pos,off) ((char*)HOP(pos,off)) |
111 | #define HOPMAYBEc(pos,off) ((char*)HOPMAYBE(pos,off)) | |
a0d0e21e | 112 | |
efb30f32 | 113 | #define HOPBACK(pos, off) ( \ |
53c4c00c | 114 | (UTF && PL_reg_match_utf8) \ |
efb30f32 HS |
115 | ? reghopmaybe((U8*)pos, -off) \ |
116 | : (pos - off >= PL_bostr) \ | |
117 | ? (U8*)(pos - off) \ | |
118 | : (U8*)NULL \ | |
119 | ) | |
120 | #define HOPBACKc(pos, off) (char*)HOPBACK(pos, off) | |
121 | ||
1aa99e6b IH |
122 | #define reghop3_c(pos,off,lim) ((char*)reghop3((U8*)pos, off, (U8*)lim)) |
123 | #define reghopmaybe3_c(pos,off,lim) ((char*)reghopmaybe3((U8*)pos, off, (U8*)lim)) | |
53c4c00c JH |
124 | #define HOP3(pos,off,lim) (PL_reg_match_utf8 ? reghop3((U8*)pos, off, (U8*)lim) : (U8*)(pos + off)) |
125 | #define HOPMAYBE3(pos,off,lim) (PL_reg_match_utf8 ? reghopmaybe3((U8*)pos, off, (U8*)lim) : (U8*)(pos + off)) | |
1aa99e6b IH |
126 | #define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim)) |
127 | #define HOPMAYBE3c(pos,off,lim) ((char*)HOPMAYBE3(pos,off,lim)) | |
128 | ||
8269fa76 | 129 | #define LOAD_UTF8_CHARCLASS(a,b) STMT_START { if (!CAT2(PL_utf8_,a)) (void)CAT2(is_utf8_, a)((U8*)b); } STMT_END |
51371543 | 130 | |
5f80c4cf | 131 | /* for use after a quantifier and before an EXACT-like node -- japhy */ |
74750237 JP |
132 | #define NEXT_IMPT(to_rn) STMT_START { \ |
133 | while (OP(to_rn) == OPEN || OP(to_rn) == CLOSE || OP(to_rn) == EVAL) \ | |
5f80c4cf JP |
134 | to_rn += NEXT_OFF(to_rn); \ |
135 | } STMT_END | |
74750237 | 136 | |
acfe0abc | 137 | static void restore_pos(pTHX_ void *arg); |
51371543 | 138 | |
76e3520e | 139 | STATIC CHECKPOINT |
cea2e8a9 | 140 | S_regcppush(pTHX_ I32 parenfloor) |
a0d0e21e | 141 | { |
3280af22 | 142 | int retval = PL_savestack_ix; |
b1ce53c5 JH |
143 | #define REGCP_PAREN_ELEMS 4 |
144 | int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS; | |
a0d0e21e LW |
145 | int p; |
146 | ||
e49a9654 IH |
147 | if (paren_elems_to_push < 0) |
148 | Perl_croak(aTHX_ "panic: paren_elems_to_push < 0"); | |
149 | ||
a01268b5 | 150 | #define REGCP_OTHER_ELEMS 6 |
b1ce53c5 | 151 | SSCHECK(paren_elems_to_push + REGCP_OTHER_ELEMS); |
3280af22 | 152 | for (p = PL_regsize; p > parenfloor; p--) { |
b1ce53c5 | 153 | /* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */ |
cf93c79d IZ |
154 | SSPUSHINT(PL_regendp[p]); |
155 | SSPUSHINT(PL_regstartp[p]); | |
3280af22 | 156 | SSPUSHPTR(PL_reg_start_tmp[p]); |
a0d0e21e LW |
157 | SSPUSHINT(p); |
158 | } | |
b1ce53c5 | 159 | /* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */ |
3280af22 NIS |
160 | SSPUSHINT(PL_regsize); |
161 | SSPUSHINT(*PL_reglastparen); | |
a01268b5 | 162 | SSPUSHINT(*PL_reglastcloseparen); |
3280af22 | 163 | SSPUSHPTR(PL_reginput); |
41123dfd JH |
164 | #define REGCP_FRAME_ELEMS 2 |
165 | /* REGCP_FRAME_ELEMS are part of the REGCP_OTHER_ELEMS and | |
166 | * are needed for the regexp context stack bookkeeping. */ | |
167 | SSPUSHINT(paren_elems_to_push + REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS); | |
b1ce53c5 | 168 | SSPUSHINT(SAVEt_REGCONTEXT); /* Magic cookie. */ |
41123dfd | 169 | |
a0d0e21e LW |
170 | return retval; |
171 | } | |
172 | ||
c277df42 | 173 | /* These are needed since we do not localize EVAL nodes: */ |
02db2b7b | 174 | # define REGCP_SET(cp) DEBUG_r(PerlIO_printf(Perl_debug_log, \ |
faccc32b | 175 | " Setting an EVAL scope, savestack=%"IVdf"\n", \ |
02db2b7b | 176 | (IV)PL_savestack_ix)); cp = PL_savestack_ix |
c3464db5 | 177 | |
02db2b7b | 178 | # define REGCP_UNWIND(cp) DEBUG_r(cp != PL_savestack_ix ? \ |
c3464db5 | 179 | PerlIO_printf(Perl_debug_log, \ |
faccc32b | 180 | " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \ |
02db2b7b | 181 | (IV)(cp), (IV)PL_savestack_ix) : 0); regcpblow(cp) |
c277df42 | 182 | |
76e3520e | 183 | STATIC char * |
cea2e8a9 | 184 | S_regcppop(pTHX) |
a0d0e21e | 185 | { |
b1ce53c5 | 186 | I32 i; |
a0d0e21e LW |
187 | U32 paren = 0; |
188 | char *input; | |
cf93c79d | 189 | I32 tmps; |
b1ce53c5 JH |
190 | |
191 | /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */ | |
a0d0e21e | 192 | i = SSPOPINT; |
b1ce53c5 JH |
193 | assert(i == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */ |
194 | i = SSPOPINT; /* Parentheses elements to pop. */ | |
a0d0e21e | 195 | input = (char *) SSPOPPTR; |
a01268b5 | 196 | *PL_reglastcloseparen = SSPOPINT; |
3280af22 NIS |
197 | *PL_reglastparen = SSPOPINT; |
198 | PL_regsize = SSPOPINT; | |
b1ce53c5 JH |
199 | |
200 | /* Now restore the parentheses context. */ | |
41123dfd JH |
201 | for (i -= (REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS); |
202 | i > 0; i -= REGCP_PAREN_ELEMS) { | |
a0d0e21e | 203 | paren = (U32)SSPOPINT; |
3280af22 | 204 | PL_reg_start_tmp[paren] = (char *) SSPOPPTR; |
cf93c79d IZ |
205 | PL_regstartp[paren] = SSPOPINT; |
206 | tmps = SSPOPINT; | |
3280af22 NIS |
207 | if (paren <= *PL_reglastparen) |
208 | PL_regendp[paren] = tmps; | |
c277df42 | 209 | DEBUG_r( |
c3464db5 | 210 | PerlIO_printf(Perl_debug_log, |
b900a521 | 211 | " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n", |
9041c2e3 | 212 | (UV)paren, (IV)PL_regstartp[paren], |
b900a521 | 213 | (IV)(PL_reg_start_tmp[paren] - PL_bostr), |
9041c2e3 | 214 | (IV)PL_regendp[paren], |
3280af22 | 215 | (paren > *PL_reglastparen ? "(no)" : "")); |
c277df42 | 216 | ); |
a0d0e21e | 217 | } |
c277df42 | 218 | DEBUG_r( |
3280af22 | 219 | if (*PL_reglastparen + 1 <= PL_regnpar) { |
c3464db5 | 220 | PerlIO_printf(Perl_debug_log, |
faccc32b JH |
221 | " restoring \\%"IVdf"..\\%"IVdf" to undef\n", |
222 | (IV)(*PL_reglastparen + 1), (IV)PL_regnpar); | |
c277df42 IZ |
223 | } |
224 | ); | |
daf18116 | 225 | #if 1 |
dafc8851 JH |
226 | /* It would seem that the similar code in regtry() |
227 | * already takes care of this, and in fact it is in | |
228 | * a better location to since this code can #if 0-ed out | |
229 | * but the code in regtry() is needed or otherwise tests | |
230 | * requiring null fields (pat.t#187 and split.t#{13,14} | |
daf18116 JH |
231 | * (as of patchlevel 7877) will fail. Then again, |
232 | * this code seems to be necessary or otherwise | |
233 | * building DynaLoader will fail: | |
234 | * "Error: '*' not in typemap in DynaLoader.xs, line 164" | |
235 | * --jhi */ | |
3280af22 NIS |
236 | for (paren = *PL_reglastparen + 1; paren <= PL_regnpar; paren++) { |
237 | if (paren > PL_regsize) | |
cf93c79d IZ |
238 | PL_regstartp[paren] = -1; |
239 | PL_regendp[paren] = -1; | |
a0d0e21e | 240 | } |
dafc8851 | 241 | #endif |
a0d0e21e LW |
242 | return input; |
243 | } | |
244 | ||
0f5d15d6 | 245 | STATIC char * |
cea2e8a9 | 246 | S_regcp_set_to(pTHX_ I32 ss) |
0f5d15d6 IZ |
247 | { |
248 | I32 tmp = PL_savestack_ix; | |
249 | ||
250 | PL_savestack_ix = ss; | |
251 | regcppop(); | |
252 | PL_savestack_ix = tmp; | |
942e002e | 253 | return Nullch; |
0f5d15d6 IZ |
254 | } |
255 | ||
256 | typedef struct re_cc_state | |
257 | { | |
258 | I32 ss; | |
259 | regnode *node; | |
260 | struct re_cc_state *prev; | |
261 | CURCUR *cc; | |
262 | regexp *re; | |
263 | } re_cc_state; | |
264 | ||
02db2b7b | 265 | #define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */ |
a0d0e21e | 266 | |
29d1e993 HS |
267 | #define TRYPAREN(paren, n, input) { \ |
268 | if (paren) { \ | |
269 | if (n) { \ | |
270 | PL_regstartp[paren] = HOPc(input, -1) - PL_bostr; \ | |
271 | PL_regendp[paren] = input - PL_bostr; \ | |
272 | } \ | |
273 | else \ | |
274 | PL_regendp[paren] = -1; \ | |
275 | } \ | |
276 | if (regmatch(next)) \ | |
277 | sayYES; \ | |
278 | if (paren && n) \ | |
279 | PL_regendp[paren] = -1; \ | |
280 | } | |
281 | ||
282 | ||
a687059c | 283 | /* |
e50aee73 | 284 | * pregexec and friends |
a687059c LW |
285 | */ |
286 | ||
287 | /* | |
c277df42 | 288 | - pregexec - match a regexp against a string |
a687059c | 289 | */ |
c277df42 | 290 | I32 |
864dbfa3 | 291 | Perl_pregexec(pTHX_ register regexp *prog, char *stringarg, register char *strend, |
c3464db5 | 292 | char *strbeg, I32 minend, SV *screamer, U32 nosave) |
c277df42 IZ |
293 | /* strend: pointer to null at end of string */ |
294 | /* strbeg: real beginning of string */ | |
295 | /* minend: end of match must be >=minend after stringarg. */ | |
296 | /* nosave: For optimizations. */ | |
297 | { | |
298 | return | |
9041c2e3 | 299 | regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL, |
c277df42 IZ |
300 | nosave ? 0 : REXEC_COPY_STR); |
301 | } | |
0f5d15d6 IZ |
302 | |
303 | STATIC void | |
cea2e8a9 | 304 | S_cache_re(pTHX_ regexp *prog) |
0f5d15d6 IZ |
305 | { |
306 | PL_regprecomp = prog->precomp; /* Needed for FAIL. */ | |
307 | #ifdef DEBUGGING | |
308 | PL_regprogram = prog->program; | |
309 | #endif | |
310 | PL_regnpar = prog->nparens; | |
9041c2e3 NIS |
311 | PL_regdata = prog->data; |
312 | PL_reg_re = prog; | |
0f5d15d6 | 313 | } |
22e551b9 | 314 | |
9041c2e3 | 315 | /* |
cad2e5aa JH |
316 | * Need to implement the following flags for reg_anch: |
317 | * | |
318 | * USE_INTUIT_NOML - Useful to call re_intuit_start() first | |
319 | * USE_INTUIT_ML | |
320 | * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer | |
321 | * INTUIT_AUTORITATIVE_ML | |
322 | * INTUIT_ONCE_NOML - Intuit can match in one location only. | |
323 | * INTUIT_ONCE_ML | |
324 | * | |
325 | * Another flag for this function: SECOND_TIME (so that float substrs | |
326 | * with giant delta may be not rechecked). | |
327 | */ | |
328 | ||
329 | /* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */ | |
330 | ||
2c2d71f5 | 331 | /* If SCREAM, then SvPVX(sv) should be compatible with strpos and strend. |
cad2e5aa JH |
332 | Otherwise, only SvCUR(sv) is used to get strbeg. */ |
333 | ||
334 | /* XXXX We assume that strpos is strbeg unless sv. */ | |
335 | ||
6eb5f6b9 JH |
336 | /* XXXX Some places assume that there is a fixed substring. |
337 | An update may be needed if optimizer marks as "INTUITable" | |
338 | RExen without fixed substrings. Similarly, it is assumed that | |
339 | lengths of all the strings are no more than minlen, thus they | |
340 | cannot come from lookahead. | |
341 | (Or minlen should take into account lookahead.) */ | |
342 | ||
2c2d71f5 JH |
343 | /* A failure to find a constant substring means that there is no need to make |
344 | an expensive call to REx engine, thus we celebrate a failure. Similarly, | |
345 | finding a substring too deep into the string means that less calls to | |
30944b6d IZ |
346 | regtry() should be needed. |
347 | ||
348 | REx compiler's optimizer found 4 possible hints: | |
349 | a) Anchored substring; | |
350 | b) Fixed substring; | |
351 | c) Whether we are anchored (beginning-of-line or \G); | |
352 | d) First node (of those at offset 0) which may distingush positions; | |
6eb5f6b9 | 353 | We use a)b)d) and multiline-part of c), and try to find a position in the |
30944b6d IZ |
354 | string which does not contradict any of them. |
355 | */ | |
2c2d71f5 | 356 | |
6eb5f6b9 JH |
357 | /* Most of decisions we do here should have been done at compile time. |
358 | The nodes of the REx which we used for the search should have been | |
359 | deleted from the finite automaton. */ | |
360 | ||
cad2e5aa JH |
361 | char * |
362 | Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, | |
363 | char *strend, U32 flags, re_scream_pos_data *data) | |
364 | { | |
b7953727 | 365 | register I32 start_shift = 0; |
cad2e5aa | 366 | /* Should be nonnegative! */ |
b7953727 | 367 | register I32 end_shift = 0; |
2c2d71f5 JH |
368 | register char *s; |
369 | register SV *check; | |
a1933d95 | 370 | char *strbeg; |
cad2e5aa JH |
371 | char *t; |
372 | I32 ml_anch; | |
6eb5f6b9 | 373 | register char *other_last = Nullch; /* other substr checked before this */ |
b7953727 | 374 | char *check_at = Nullch; /* check substr found at this pos */ |
30944b6d IZ |
375 | #ifdef DEBUGGING |
376 | char *i_strpos = strpos; | |
377 | #endif | |
cad2e5aa JH |
378 | |
379 | DEBUG_r( if (!PL_colorset) reginitcolors() ); | |
380 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
2c2d71f5 | 381 | "%sGuessing start of match, REx%s `%s%.60s%s%s' against `%s%.*s%s%s'...\n", |
cad2e5aa JH |
382 | PL_colors[4],PL_colors[5],PL_colors[0], |
383 | prog->precomp, | |
384 | PL_colors[1], | |
385 | (strlen(prog->precomp) > 60 ? "..." : ""), | |
386 | PL_colors[0], | |
b900a521 | 387 | (int)(strend - strpos > 60 ? 60 : strend - strpos), |
cad2e5aa JH |
388 | strpos, PL_colors[1], |
389 | (strend - strpos > 60 ? "..." : "")) | |
390 | ); | |
391 | ||
1aa99e6b IH |
392 | if (prog->reganch & ROPT_UTF8) |
393 | PL_reg_flags |= RF_utf8; | |
394 | ||
395 | if (prog->minlen > CHR_DIST((U8*)strend, (U8*)strpos)) { | |
2c2d71f5 | 396 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String too short...\n")); |
cad2e5aa | 397 | goto fail; |
2c2d71f5 | 398 | } |
a1933d95 | 399 | strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos; |
1aa99e6b | 400 | PL_regeol = strend; |
653099ff | 401 | check = prog->check_substr; |
2c2d71f5 | 402 | if (prog->reganch & ROPT_ANCH) { /* Match at beg-of-str or after \n */ |
cad2e5aa JH |
403 | ml_anch = !( (prog->reganch & ROPT_ANCH_SINGLE) |
404 | || ( (prog->reganch & ROPT_ANCH_BOL) | |
2c2d71f5 | 405 | && !PL_multiline ) ); /* Check after \n? */ |
cad2e5aa | 406 | |
7e25d62c JH |
407 | if (!ml_anch) { |
408 | if ( !(prog->reganch & (ROPT_ANCH_GPOS /* Checked by the caller */ | |
409 | | ROPT_IMPLICIT)) /* not a real BOL */ | |
410 | /* SvCUR is not set on references: SvRV and SvPVX overlap */ | |
411 | && sv && !SvROK(sv) | |
412 | && (strpos != strbeg)) { | |
413 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Not at start...\n")); | |
414 | goto fail; | |
415 | } | |
416 | if (prog->check_offset_min == prog->check_offset_max && | |
cce850e4 | 417 | !(prog->reganch & ROPT_CANY_SEEN)) { |
2c2d71f5 | 418 | /* Substring at constant offset from beg-of-str... */ |
cad2e5aa JH |
419 | I32 slen; |
420 | ||
1aa99e6b | 421 | s = HOP3c(strpos, prog->check_offset_min, strend); |
653099ff GS |
422 | if (SvTAIL(check)) { |
423 | slen = SvCUR(check); /* >= 1 */ | |
cad2e5aa | 424 | |
9041c2e3 | 425 | if ( strend - s > slen || strend - s < slen - 1 |
2c2d71f5 JH |
426 | || (strend - s == slen && strend[-1] != '\n')) { |
427 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String too long...\n")); | |
428 | goto fail_finish; | |
cad2e5aa JH |
429 | } |
430 | /* Now should match s[0..slen-2] */ | |
431 | slen--; | |
653099ff | 432 | if (slen && (*SvPVX(check) != *s |
cad2e5aa | 433 | || (slen > 1 |
653099ff | 434 | && memNE(SvPVX(check), s, slen)))) { |
2c2d71f5 JH |
435 | report_neq: |
436 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String not equal...\n")); | |
437 | goto fail_finish; | |
438 | } | |
cad2e5aa | 439 | } |
653099ff GS |
440 | else if (*SvPVX(check) != *s |
441 | || ((slen = SvCUR(check)) > 1 | |
442 | && memNE(SvPVX(check), s, slen))) | |
2c2d71f5 JH |
443 | goto report_neq; |
444 | goto success_at_start; | |
7e25d62c | 445 | } |
cad2e5aa | 446 | } |
2c2d71f5 | 447 | /* Match is anchored, but substr is not anchored wrt beg-of-str. */ |
cad2e5aa | 448 | s = strpos; |
2c2d71f5 | 449 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
2c2d71f5 | 450 | end_shift = prog->minlen - start_shift - |
653099ff | 451 | CHR_SVLEN(check) + (SvTAIL(check) != 0); |
2c2d71f5 | 452 | if (!ml_anch) { |
653099ff GS |
453 | I32 end = prog->check_offset_max + CHR_SVLEN(check) |
454 | - (SvTAIL(check) != 0); | |
1aa99e6b | 455 | I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end; |
2c2d71f5 JH |
456 | |
457 | if (end_shift < eshift) | |
458 | end_shift = eshift; | |
459 | } | |
cad2e5aa | 460 | } |
2c2d71f5 | 461 | else { /* Can match at random position */ |
cad2e5aa JH |
462 | ml_anch = 0; |
463 | s = strpos; | |
2c2d71f5 JH |
464 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
465 | /* Should be nonnegative! */ | |
466 | end_shift = prog->minlen - start_shift - | |
653099ff | 467 | CHR_SVLEN(check) + (SvTAIL(check) != 0); |
cad2e5aa JH |
468 | } |
469 | ||
2c2d71f5 | 470 | #ifdef DEBUGGING /* 7/99: reports of failure (with the older version) */ |
0033605d | 471 | if (end_shift < 0) |
6bbae5e6 | 472 | Perl_croak(aTHX_ "panic: end_shift"); |
2c2d71f5 JH |
473 | #endif |
474 | ||
2c2d71f5 JH |
475 | restart: |
476 | /* Find a possible match in the region s..strend by looking for | |
477 | the "check" substring in the region corrected by start/end_shift. */ | |
cad2e5aa | 478 | if (flags & REXEC_SCREAM) { |
cad2e5aa JH |
479 | I32 p = -1; /* Internal iterator of scream. */ |
480 | I32 *pp = data ? data->scream_pos : &p; | |
481 | ||
2c2d71f5 JH |
482 | if (PL_screamfirst[BmRARE(check)] >= 0 |
483 | || ( BmRARE(check) == '\n' | |
484 | && (BmPREVIOUS(check) == SvCUR(check) - 1) | |
485 | && SvTAIL(check) )) | |
9041c2e3 | 486 | s = screaminstr(sv, check, |
2c2d71f5 | 487 | start_shift + (s - strbeg), end_shift, pp, 0); |
cad2e5aa | 488 | else |
2c2d71f5 | 489 | goto fail_finish; |
cad2e5aa JH |
490 | if (data) |
491 | *data->scream_olds = s; | |
492 | } | |
f33976b4 | 493 | else if (prog->reganch & ROPT_CANY_SEEN) |
3baa4c62 JH |
494 | s = fbm_instr((U8*)(s + start_shift), |
495 | (U8*)(strend - end_shift), | |
496 | check, PL_multiline ? FBMrf_MULTILINE : 0); | |
cad2e5aa | 497 | else |
1aa99e6b IH |
498 | s = fbm_instr(HOP3(s, start_shift, strend), |
499 | HOP3(strend, -end_shift, strbeg), | |
2c2d71f5 | 500 | check, PL_multiline ? FBMrf_MULTILINE : 0); |
cad2e5aa JH |
501 | |
502 | /* Update the count-of-usability, remove useless subpatterns, | |
503 | unshift s. */ | |
2c2d71f5 JH |
504 | |
505 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%s %s substr `%s%.*s%s'%s%s", | |
506 | (s ? "Found" : "Did not find"), | |
507 | ((check == prog->anchored_substr) ? "anchored" : "floating"), | |
508 | PL_colors[0], | |
7b0972df JH |
509 | (int)(SvCUR(check) - (SvTAIL(check)!=0)), |
510 | SvPVX(check), | |
2c2d71f5 JH |
511 | PL_colors[1], (SvTAIL(check) ? "$" : ""), |
512 | (s ? " at offset " : "...\n") ) ); | |
513 | ||
514 | if (!s) | |
515 | goto fail_finish; | |
516 | ||
6eb5f6b9 JH |
517 | check_at = s; |
518 | ||
2c2d71f5 | 519 | /* Finish the diagnostic message */ |
30944b6d | 520 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) ); |
2c2d71f5 JH |
521 | |
522 | /* Got a candidate. Check MBOL anchoring, and the *other* substr. | |
523 | Start with the other substr. | |
524 | XXXX no SCREAM optimization yet - and a very coarse implementation | |
525 | XXXX /ttx+/ results in anchored=`ttx', floating=`x'. floating will | |
526 | *always* match. Probably should be marked during compile... | |
527 | Probably it is right to do no SCREAM here... | |
528 | */ | |
529 | ||
530 | if (prog->float_substr && prog->anchored_substr) { | |
30944b6d | 531 | /* Take into account the "other" substring. */ |
2c2d71f5 JH |
532 | /* XXXX May be hopelessly wrong for UTF... */ |
533 | if (!other_last) | |
6eb5f6b9 | 534 | other_last = strpos; |
2c2d71f5 | 535 | if (check == prog->float_substr) { |
30944b6d IZ |
536 | do_other_anchored: |
537 | { | |
1aa99e6b | 538 | char *last = HOP3c(s, -start_shift, strbeg), *last1, *last2; |
2c2d71f5 JH |
539 | char *s1 = s; |
540 | ||
2c2d71f5 JH |
541 | t = s - prog->check_offset_max; |
542 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ | |
543 | && (!(prog->reganch & ROPT_UTF8) | |
1aa99e6b | 544 | || ((t = reghopmaybe3_c(s, -(prog->check_offset_max), strpos)) |
2c2d71f5 | 545 | && t > strpos))) |
30944b6d | 546 | /* EMPTY */; |
2c2d71f5 JH |
547 | else |
548 | t = strpos; | |
1aa99e6b | 549 | t = HOP3c(t, prog->anchored_offset, strend); |
6eb5f6b9 JH |
550 | if (t < other_last) /* These positions already checked */ |
551 | t = other_last; | |
1aa99e6b | 552 | last2 = last1 = HOP3c(strend, -prog->minlen, strbeg); |
2c2d71f5 JH |
553 | if (last < last1) |
554 | last1 = last; | |
555 | /* XXXX It is not documented what units *_offsets are in. Assume bytes. */ | |
556 | /* On end-of-str: see comment below. */ | |
557 | s = fbm_instr((unsigned char*)t, | |
1aa99e6b IH |
558 | HOP3(HOP3(last1, prog->anchored_offset, strend) |
559 | + SvCUR(prog->anchored_substr), | |
560 | -(SvTAIL(prog->anchored_substr)!=0), strbeg), | |
561 | prog->anchored_substr, | |
562 | PL_multiline ? FBMrf_MULTILINE : 0); | |
563 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
564 | "%s anchored substr `%s%.*s%s'%s", | |
2c2d71f5 JH |
565 | (s ? "Found" : "Contradicts"), |
566 | PL_colors[0], | |
7b0972df JH |
567 | (int)(SvCUR(prog->anchored_substr) |
568 | - (SvTAIL(prog->anchored_substr)!=0)), | |
2c2d71f5 JH |
569 | SvPVX(prog->anchored_substr), |
570 | PL_colors[1], (SvTAIL(prog->anchored_substr) ? "$" : ""))); | |
571 | if (!s) { | |
572 | if (last1 >= last2) { | |
573 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
574 | ", giving up...\n")); | |
575 | goto fail_finish; | |
576 | } | |
577 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
578 | ", trying floating at offset %ld...\n", | |
1aa99e6b IH |
579 | (long)(HOP3c(s1, 1, strend) - i_strpos))); |
580 | other_last = HOP3c(last1, prog->anchored_offset+1, strend); | |
581 | s = HOP3c(last, 1, strend); | |
2c2d71f5 JH |
582 | goto restart; |
583 | } | |
584 | else { | |
585 | DEBUG_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", | |
30944b6d | 586 | (long)(s - i_strpos))); |
1aa99e6b IH |
587 | t = HOP3c(s, -prog->anchored_offset, strbeg); |
588 | other_last = HOP3c(s, 1, strend); | |
30944b6d | 589 | s = s1; |
2c2d71f5 JH |
590 | if (t == strpos) |
591 | goto try_at_start; | |
2c2d71f5 JH |
592 | goto try_at_offset; |
593 | } | |
30944b6d | 594 | } |
2c2d71f5 JH |
595 | } |
596 | else { /* Take into account the floating substring. */ | |
597 | char *last, *last1; | |
598 | char *s1 = s; | |
599 | ||
1aa99e6b IH |
600 | t = HOP3c(s, -start_shift, strbeg); |
601 | last1 = last = | |
602 | HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg); | |
603 | if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset) | |
604 | last = HOP3c(t, prog->float_max_offset, strend); | |
605 | s = HOP3c(t, prog->float_min_offset, strend); | |
6eb5f6b9 JH |
606 | if (s < other_last) |
607 | s = other_last; | |
2c2d71f5 JH |
608 | /* XXXX It is not documented what units *_offsets are in. Assume bytes. */ |
609 | /* fbm_instr() takes into account exact value of end-of-str | |
610 | if the check is SvTAIL(ed). Since false positives are OK, | |
611 | and end-of-str is not later than strend we are OK. */ | |
612 | s = fbm_instr((unsigned char*)s, | |
613 | (unsigned char*)last + SvCUR(prog->float_substr) | |
614 | - (SvTAIL(prog->float_substr)!=0), | |
615 | prog->float_substr, PL_multiline ? FBMrf_MULTILINE : 0); | |
616 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%s floating substr `%s%.*s%s'%s", | |
617 | (s ? "Found" : "Contradicts"), | |
618 | PL_colors[0], | |
7b0972df JH |
619 | (int)(SvCUR(prog->float_substr) |
620 | - (SvTAIL(prog->float_substr)!=0)), | |
2c2d71f5 JH |
621 | SvPVX(prog->float_substr), |
622 | PL_colors[1], (SvTAIL(prog->float_substr) ? "$" : ""))); | |
623 | if (!s) { | |
624 | if (last1 == last) { | |
625 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
626 | ", giving up...\n")); | |
627 | goto fail_finish; | |
628 | } | |
629 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
630 | ", trying anchored starting at offset %ld...\n", | |
30944b6d | 631 | (long)(s1 + 1 - i_strpos))); |
803ff556 | 632 | other_last = last; |
1aa99e6b | 633 | s = HOP3c(t, 1, strend); |
2c2d71f5 JH |
634 | goto restart; |
635 | } | |
636 | else { | |
637 | DEBUG_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", | |
30944b6d | 638 | (long)(s - i_strpos))); |
803ff556 | 639 | other_last = s; /* Fix this later. --Hugo */ |
30944b6d | 640 | s = s1; |
2c2d71f5 JH |
641 | if (t == strpos) |
642 | goto try_at_start; | |
2c2d71f5 JH |
643 | goto try_at_offset; |
644 | } | |
645 | } | |
cad2e5aa | 646 | } |
2c2d71f5 JH |
647 | |
648 | t = s - prog->check_offset_max; | |
2c2d71f5 JH |
649 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ |
650 | && (!(prog->reganch & ROPT_UTF8) | |
1aa99e6b IH |
651 | || ((t = reghopmaybe3_c(s, -prog->check_offset_max, strpos)) |
652 | && t > strpos))) { | |
2c2d71f5 JH |
653 | /* Fixed substring is found far enough so that the match |
654 | cannot start at strpos. */ | |
655 | try_at_offset: | |
cad2e5aa | 656 | if (ml_anch && t[-1] != '\n') { |
30944b6d IZ |
657 | /* Eventually fbm_*() should handle this, but often |
658 | anchored_offset is not 0, so this check will not be wasted. */ | |
659 | /* XXXX In the code below we prefer to look for "^" even in | |
660 | presence of anchored substrings. And we search even | |
661 | beyond the found float position. These pessimizations | |
662 | are historical artefacts only. */ | |
663 | find_anchor: | |
2c2d71f5 | 664 | while (t < strend - prog->minlen) { |
cad2e5aa | 665 | if (*t == '\n') { |
4ee3650e | 666 | if (t < check_at - prog->check_offset_min) { |
30944b6d | 667 | if (prog->anchored_substr) { |
4ee3650e GS |
668 | /* Since we moved from the found position, |
669 | we definitely contradict the found anchored | |
30944b6d IZ |
670 | substr. Due to the above check we do not |
671 | contradict "check" substr. | |
672 | Thus we can arrive here only if check substr | |
673 | is float. Redo checking for "other"=="fixed". | |
674 | */ | |
9041c2e3 | 675 | strpos = t + 1; |
30944b6d IZ |
676 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n", |
677 | PL_colors[0],PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset))); | |
678 | goto do_other_anchored; | |
679 | } | |
4ee3650e GS |
680 | /* We don't contradict the found floating substring. */ |
681 | /* XXXX Why not check for STCLASS? */ | |
cad2e5aa | 682 | s = t + 1; |
2c2d71f5 | 683 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n", |
30944b6d | 684 | PL_colors[0],PL_colors[1], (long)(s - i_strpos))); |
cad2e5aa JH |
685 | goto set_useful; |
686 | } | |
4ee3650e GS |
687 | /* Position contradicts check-string */ |
688 | /* XXXX probably better to look for check-string | |
689 | than for "\n", so one should lower the limit for t? */ | |
690 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n", | |
30944b6d | 691 | PL_colors[0],PL_colors[1], (long)(t + 1 - i_strpos))); |
0e41cd87 | 692 | other_last = strpos = s = t + 1; |
cad2e5aa JH |
693 | goto restart; |
694 | } | |
695 | t++; | |
696 | } | |
2c2d71f5 JH |
697 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n", |
698 | PL_colors[0],PL_colors[1])); | |
699 | goto fail_finish; | |
cad2e5aa | 700 | } |
f5952150 GS |
701 | else { |
702 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n", | |
703 | PL_colors[0],PL_colors[1])); | |
704 | } | |
cad2e5aa JH |
705 | s = t; |
706 | set_useful: | |
2c2d71f5 | 707 | ++BmUSEFUL(prog->check_substr); /* hooray/5 */ |
cad2e5aa JH |
708 | } |
709 | else { | |
f5952150 | 710 | /* The found string does not prohibit matching at strpos, |
2c2d71f5 | 711 | - no optimization of calling REx engine can be performed, |
f5952150 GS |
712 | unless it was an MBOL and we are not after MBOL, |
713 | or a future STCLASS check will fail this. */ | |
2c2d71f5 JH |
714 | try_at_start: |
715 | /* Even in this situation we may use MBOL flag if strpos is offset | |
716 | wrt the start of the string. */ | |
05b4157f | 717 | if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */ |
a1933d95 | 718 | && (strpos != strbeg) && strpos[-1] != '\n' |
d506a20d IZ |
719 | /* May be due to an implicit anchor of m{.*foo} */ |
720 | && !(prog->reganch & ROPT_IMPLICIT)) | |
721 | { | |
cad2e5aa JH |
722 | t = strpos; |
723 | goto find_anchor; | |
724 | } | |
30944b6d | 725 | DEBUG_r( if (ml_anch) |
f5952150 GS |
726 | PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n", |
727 | (long)(strpos - i_strpos), PL_colors[0],PL_colors[1]); | |
30944b6d | 728 | ); |
2c2d71f5 | 729 | success_at_start: |
30944b6d | 730 | if (!(prog->reganch & ROPT_NAUGHTY) /* XXXX If strpos moved? */ |
66e933ab | 731 | && prog->check_substr /* Could be deleted already */ |
cad2e5aa | 732 | && --BmUSEFUL(prog->check_substr) < 0 |
66e933ab GS |
733 | && prog->check_substr == prog->float_substr) |
734 | { | |
cad2e5aa | 735 | /* If flags & SOMETHING - do not do it many times on the same match */ |
f5952150 | 736 | DEBUG_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n")); |
cad2e5aa JH |
737 | SvREFCNT_dec(prog->check_substr); |
738 | prog->check_substr = Nullsv; /* disable */ | |
739 | prog->float_substr = Nullsv; /* clear */ | |
5e39e1e5 | 740 | check = Nullsv; /* abort */ |
cad2e5aa | 741 | s = strpos; |
3cf5c195 IZ |
742 | /* XXXX This is a remnant of the old implementation. It |
743 | looks wasteful, since now INTUIT can use many | |
6eb5f6b9 | 744 | other heuristics. */ |
cad2e5aa JH |
745 | prog->reganch &= ~RE_USE_INTUIT; |
746 | } | |
747 | else | |
748 | s = strpos; | |
749 | } | |
750 | ||
6eb5f6b9 JH |
751 | /* Last resort... */ |
752 | /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */ | |
753 | if (prog->regstclass) { | |
754 | /* minlen == 0 is possible if regstclass is \b or \B, | |
755 | and the fixed substr is ''$. | |
756 | Since minlen is already taken into account, s+1 is before strend; | |
757 | accidentally, minlen >= 1 guaranties no false positives at s + 1 | |
758 | even for \b or \B. But (minlen? 1 : 0) below assumes that | |
759 | regstclass does not come from lookahead... */ | |
760 | /* If regstclass takes bytelength more than 1: If charlength==1, OK. | |
761 | This leaves EXACTF only, which is dealt with in find_byclass(). */ | |
1aa99e6b | 762 | U8* str = (U8*)STRING(prog->regstclass); |
66e933ab | 763 | int cl_l = (PL_regkind[(U8)OP(prog->regstclass)] == EXACT |
1aa99e6b | 764 | ? CHR_DIST(str+STR_LEN(prog->regstclass), str) |
66e933ab | 765 | : 1); |
6eb5f6b9 | 766 | char *endpos = (prog->anchored_substr || ml_anch) |
1aa99e6b IH |
767 | ? HOP3c(s, (prog->minlen ? cl_l : 0), strend) |
768 | : (prog->float_substr | |
769 | ? HOP3c(HOP3c(check_at, -start_shift, strbeg), | |
770 | cl_l, strend) | |
771 | : strend); | |
a1933d95 | 772 | char *startpos = strbeg; |
6eb5f6b9 JH |
773 | |
774 | t = s; | |
76384e4a | 775 | if (prog->reganch & ROPT_UTF8) { |
ffc61ed2 | 776 | PL_regdata = prog->data; |
76384e4a GS |
777 | PL_bostr = startpos; |
778 | } | |
f33976b4 | 779 | s = find_byclass(prog, prog->regstclass, s, endpos, startpos, 1); |
6eb5f6b9 JH |
780 | if (!s) { |
781 | #ifdef DEBUGGING | |
b7953727 | 782 | char *what = 0; |
6eb5f6b9 JH |
783 | #endif |
784 | if (endpos == strend) { | |
785 | DEBUG_r( PerlIO_printf(Perl_debug_log, | |
786 | "Could not match STCLASS...\n") ); | |
787 | goto fail; | |
788 | } | |
66e933ab GS |
789 | DEBUG_r( PerlIO_printf(Perl_debug_log, |
790 | "This position contradicts STCLASS...\n") ); | |
653099ff GS |
791 | if ((prog->reganch & ROPT_ANCH) && !ml_anch) |
792 | goto fail; | |
6eb5f6b9 JH |
793 | /* Contradict one of substrings */ |
794 | if (prog->anchored_substr) { | |
6eb5f6b9 JH |
795 | if (prog->anchored_substr == check) { |
796 | DEBUG_r( what = "anchored" ); | |
797 | hop_and_restart: | |
1aa99e6b | 798 | s = HOP3c(t, 1, strend); |
66e933ab GS |
799 | if (s + start_shift + end_shift > strend) { |
800 | /* XXXX Should be taken into account earlier? */ | |
801 | DEBUG_r( PerlIO_printf(Perl_debug_log, | |
802 | "Could not match STCLASS...\n") ); | |
803 | goto fail; | |
804 | } | |
5e39e1e5 HS |
805 | if (!check) |
806 | goto giveup; | |
6eb5f6b9 | 807 | DEBUG_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 808 | "Looking for %s substr starting at offset %ld...\n", |
6eb5f6b9 JH |
809 | what, (long)(s + start_shift - i_strpos)) ); |
810 | goto restart; | |
811 | } | |
66e933ab | 812 | /* Have both, check_string is floating */ |
6eb5f6b9 JH |
813 | if (t + start_shift >= check_at) /* Contradicts floating=check */ |
814 | goto retry_floating_check; | |
815 | /* Recheck anchored substring, but not floating... */ | |
9041c2e3 | 816 | s = check_at; |
5e39e1e5 HS |
817 | if (!check) |
818 | goto giveup; | |
6eb5f6b9 | 819 | DEBUG_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 820 | "Looking for anchored substr starting at offset %ld...\n", |
6eb5f6b9 JH |
821 | (long)(other_last - i_strpos)) ); |
822 | goto do_other_anchored; | |
823 | } | |
60e71179 GS |
824 | /* Another way we could have checked stclass at the |
825 | current position only: */ | |
826 | if (ml_anch) { | |
827 | s = t = t + 1; | |
5e39e1e5 HS |
828 | if (!check) |
829 | goto giveup; | |
60e71179 | 830 | DEBUG_r( PerlIO_printf(Perl_debug_log, |
f5952150 GS |
831 | "Looking for /%s^%s/m starting at offset %ld...\n", |
832 | PL_colors[0],PL_colors[1], (long)(t - i_strpos)) ); | |
60e71179 | 833 | goto try_at_offset; |
66e933ab | 834 | } |
60e71179 GS |
835 | if (!prog->float_substr) /* Could have been deleted */ |
836 | goto fail; | |
6eb5f6b9 JH |
837 | /* Check is floating subtring. */ |
838 | retry_floating_check: | |
839 | t = check_at - start_shift; | |
840 | DEBUG_r( what = "floating" ); | |
841 | goto hop_and_restart; | |
842 | } | |
b7953727 JH |
843 | if (t != s) { |
844 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
6eb5f6b9 | 845 | "By STCLASS: moving %ld --> %ld\n", |
b7953727 JH |
846 | (long)(t - i_strpos), (long)(s - i_strpos)) |
847 | ); | |
848 | } | |
849 | else { | |
850 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
851 | "Does not contradict STCLASS...\n"); | |
852 | ); | |
853 | } | |
6eb5f6b9 | 854 | } |
5e39e1e5 HS |
855 | giveup: |
856 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n", | |
857 | PL_colors[4], (check ? "Guessed" : "Giving up"), | |
858 | PL_colors[5], (long)(s - i_strpos)) ); | |
cad2e5aa | 859 | return s; |
2c2d71f5 JH |
860 | |
861 | fail_finish: /* Substring not found */ | |
66e933ab GS |
862 | if (prog->check_substr) /* could be removed already */ |
863 | BmUSEFUL(prog->check_substr) += 5; /* hooray */ | |
cad2e5aa | 864 | fail: |
2c2d71f5 | 865 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n", |
cad2e5aa JH |
866 | PL_colors[4],PL_colors[5])); |
867 | return Nullch; | |
868 | } | |
9661b544 | 869 | |
6eb5f6b9 | 870 | /* We know what class REx starts with. Try to find this position... */ |
3c3eec57 GS |
871 | STATIC char * |
872 | S_find_byclass(pTHX_ regexp * prog, regnode *c, char *s, char *strend, char *startpos, I32 norun) | |
a687059c | 873 | { |
6eb5f6b9 JH |
874 | I32 doevery = (prog->reganch & ROPT_SKIP) == 0; |
875 | char *m; | |
d8093b23 G |
876 | STRLEN ln; |
877 | unsigned int c1; | |
878 | unsigned int c2; | |
6eb5f6b9 JH |
879 | char *e; |
880 | register I32 tmp = 1; /* Scratch variable? */ | |
53c4c00c | 881 | register bool do_utf8 = PL_reg_match_utf8; |
cad2e5aa | 882 | |
6eb5f6b9 JH |
883 | /* We know what class it must start with. */ |
884 | switch (OP(c)) { | |
6eb5f6b9 | 885 | case ANYOF: |
a0ed51b3 | 886 | while (s < strend) { |
ffc61ed2 | 887 | if (reginclass(c, (U8*)s, do_utf8)) { |
6eb5f6b9 JH |
888 | if (tmp && (norun || regtry(prog, s))) |
889 | goto got_it; | |
890 | else | |
891 | tmp = doevery; | |
a0ed51b3 | 892 | } |
6eb5f6b9 JH |
893 | else |
894 | tmp = 1; | |
ffc61ed2 | 895 | s += do_utf8 ? UTF8SKIP(s) : 1; |
a0d0e21e | 896 | } |
6eb5f6b9 | 897 | break; |
f33976b4 DB |
898 | case CANY: |
899 | while (s < strend) { | |
900 | if (tmp && (norun || regtry(prog, s))) | |
901 | goto got_it; | |
902 | else | |
903 | tmp = doevery; | |
904 | s++; | |
905 | } | |
906 | break; | |
6eb5f6b9 JH |
907 | case EXACTF: |
908 | m = STRING(c); | |
909 | ln = STR_LEN(c); | |
1aa99e6b IH |
910 | if (UTF) { |
911 | c1 = to_utf8_lower((U8*)m); | |
912 | c2 = to_utf8_upper((U8*)m); | |
913 | } | |
914 | else { | |
915 | c1 = *(U8*)m; | |
916 | c2 = PL_fold[c1]; | |
917 | } | |
6eb5f6b9 JH |
918 | goto do_exactf; |
919 | case EXACTFL: | |
920 | m = STRING(c); | |
921 | ln = STR_LEN(c); | |
d8093b23 | 922 | c1 = *(U8*)m; |
6eb5f6b9 JH |
923 | c2 = PL_fold_locale[c1]; |
924 | do_exactf: | |
925 | e = strend - ln; | |
b3c9acc1 | 926 | |
6eb5f6b9 JH |
927 | if (norun && e < s) |
928 | e = s; /* Due to minlen logic of intuit() */ | |
1aa99e6b IH |
929 | |
930 | if (do_utf8) { | |
931 | STRLEN len; | |
932 | if (c1 == c2) | |
933 | while (s <= e) { | |
9041c2e3 | 934 | if ( utf8_to_uvchr((U8*)s, &len) == c1 |
1aa99e6b IH |
935 | && regtry(prog, s) ) |
936 | goto got_it; | |
937 | s += len; | |
938 | } | |
939 | else | |
940 | while (s <= e) { | |
9041c2e3 | 941 | UV c = utf8_to_uvchr((U8*)s, &len); |
1aa99e6b IH |
942 | if ( (c == c1 || c == c2) && regtry(prog, s) ) |
943 | goto got_it; | |
944 | s += len; | |
945 | } | |
946 | } | |
947 | else { | |
948 | if (c1 == c2) | |
949 | while (s <= e) { | |
950 | if ( *(U8*)s == c1 | |
951 | && (ln == 1 || !(OP(c) == EXACTF | |
952 | ? ibcmp(s, m, ln) | |
953 | : ibcmp_locale(s, m, ln))) | |
954 | && (norun || regtry(prog, s)) ) | |
955 | goto got_it; | |
956 | s++; | |
957 | } | |
958 | else | |
959 | while (s <= e) { | |
960 | if ( (*(U8*)s == c1 || *(U8*)s == c2) | |
961 | && (ln == 1 || !(OP(c) == EXACTF | |
962 | ? ibcmp(s, m, ln) | |
963 | : ibcmp_locale(s, m, ln))) | |
964 | && (norun || regtry(prog, s)) ) | |
965 | goto got_it; | |
966 | s++; | |
967 | } | |
b3c9acc1 IZ |
968 | } |
969 | break; | |
bbce6d69 | 970 | case BOUNDL: |
3280af22 | 971 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 972 | /* FALL THROUGH */ |
a0d0e21e | 973 | case BOUND: |
ffc61ed2 | 974 | if (do_utf8) { |
12d33761 | 975 | if (s == PL_bostr) |
ffc61ed2 JH |
976 | tmp = '\n'; |
977 | else { | |
1aa99e6b | 978 | U8 *r = reghop3((U8*)s, -1, (U8*)startpos); |
9041c2e3 | 979 | |
0064a8a9 JH |
980 | if (s > (char*)r) |
981 | tmp = (I32)utf8n_to_uvchr(r, s - (char*)r, 0, 0); | |
ffc61ed2 JH |
982 | } |
983 | tmp = ((OP(c) == BOUND ? | |
9041c2e3 | 984 | isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0); |
8269fa76 | 985 | LOAD_UTF8_CHARCLASS(alnum,"a"); |
ffc61ed2 JH |
986 | while (s < strend) { |
987 | if (tmp == !(OP(c) == BOUND ? | |
3568d838 | 988 | swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) : |
ffc61ed2 JH |
989 | isALNUM_LC_utf8((U8*)s))) |
990 | { | |
991 | tmp = !tmp; | |
992 | if ((norun || regtry(prog, s))) | |
993 | goto got_it; | |
994 | } | |
995 | s += UTF8SKIP(s); | |
a687059c | 996 | } |
a0d0e21e | 997 | } |
667bb95a | 998 | else { |
12d33761 | 999 | tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n'; |
ffc61ed2 JH |
1000 | tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0); |
1001 | while (s < strend) { | |
1002 | if (tmp == | |
1003 | !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) { | |
1004 | tmp = !tmp; | |
1005 | if ((norun || regtry(prog, s))) | |
1006 | goto got_it; | |
1007 | } | |
1008 | s++; | |
a0ed51b3 | 1009 | } |
a0ed51b3 | 1010 | } |
6eb5f6b9 | 1011 | if ((!prog->minlen && tmp) && (norun || regtry(prog, s))) |
a0ed51b3 LW |
1012 | goto got_it; |
1013 | break; | |
bbce6d69 | 1014 | case NBOUNDL: |
3280af22 | 1015 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 1016 | /* FALL THROUGH */ |
a0d0e21e | 1017 | case NBOUND: |
ffc61ed2 | 1018 | if (do_utf8) { |
12d33761 | 1019 | if (s == PL_bostr) |
ffc61ed2 JH |
1020 | tmp = '\n'; |
1021 | else { | |
1aa99e6b | 1022 | U8 *r = reghop3((U8*)s, -1, (U8*)startpos); |
9041c2e3 | 1023 | |
0064a8a9 JH |
1024 | if (s > (char*)r) |
1025 | tmp = (I32)utf8n_to_uvchr(r, s - (char*)r, 0, 0); | |
ffc61ed2 JH |
1026 | } |
1027 | tmp = ((OP(c) == NBOUND ? | |
9041c2e3 | 1028 | isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0); |
8269fa76 | 1029 | LOAD_UTF8_CHARCLASS(alnum,"a"); |
ffc61ed2 JH |
1030 | while (s < strend) { |
1031 | if (tmp == !(OP(c) == NBOUND ? | |
3568d838 | 1032 | swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) : |
ffc61ed2 JH |
1033 | isALNUM_LC_utf8((U8*)s))) |
1034 | tmp = !tmp; | |
1035 | else if ((norun || regtry(prog, s))) | |
1036 | goto got_it; | |
1037 | s += UTF8SKIP(s); | |
1038 | } | |
a0d0e21e | 1039 | } |
667bb95a | 1040 | else { |
12d33761 | 1041 | tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n'; |
ffc61ed2 JH |
1042 | tmp = ((OP(c) == NBOUND ? |
1043 | isALNUM(tmp) : isALNUM_LC(tmp)) != 0); | |
1044 | while (s < strend) { | |
1045 | if (tmp == | |
1046 | !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s))) | |
1047 | tmp = !tmp; | |
1048 | else if ((norun || regtry(prog, s))) | |
1049 | goto got_it; | |
1050 | s++; | |
1051 | } | |
a0ed51b3 | 1052 | } |
6eb5f6b9 | 1053 | if ((!prog->minlen && !tmp) && (norun || regtry(prog, s))) |
a0ed51b3 LW |
1054 | goto got_it; |
1055 | break; | |
a0d0e21e | 1056 | case ALNUM: |
ffc61ed2 | 1057 | if (do_utf8) { |
8269fa76 | 1058 | LOAD_UTF8_CHARCLASS(alnum,"a"); |
ffc61ed2 | 1059 | while (s < strend) { |
3568d838 | 1060 | if (swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8)) { |
ffc61ed2 JH |
1061 | if (tmp && (norun || regtry(prog, s))) |
1062 | goto got_it; | |
1063 | else | |
1064 | tmp = doevery; | |
1065 | } | |
bbce6d69 | 1066 | else |
ffc61ed2 JH |
1067 | tmp = 1; |
1068 | s += UTF8SKIP(s); | |
bbce6d69 | 1069 | } |
bbce6d69 | 1070 | } |
ffc61ed2 JH |
1071 | else { |
1072 | while (s < strend) { | |
1073 | if (isALNUM(*s)) { | |
1074 | if (tmp && (norun || regtry(prog, s))) | |
1075 | goto got_it; | |
1076 | else | |
1077 | tmp = doevery; | |
1078 | } | |
a0ed51b3 | 1079 | else |
ffc61ed2 JH |
1080 | tmp = 1; |
1081 | s++; | |
a0ed51b3 | 1082 | } |
a0ed51b3 LW |
1083 | } |
1084 | break; | |
bbce6d69 | 1085 | case ALNUML: |
3280af22 | 1086 | PL_reg_flags |= RF_tainted; |
ffc61ed2 JH |
1087 | if (do_utf8) { |
1088 | while (s < strend) { | |
1089 | if (isALNUM_LC_utf8((U8*)s)) { | |
1090 | if (tmp && (norun || regtry(prog, s))) | |
1091 | goto got_it; | |
1092 | else | |
1093 | tmp = doevery; | |
1094 | } | |
a687059c | 1095 | else |
ffc61ed2 JH |
1096 | tmp = 1; |
1097 | s += UTF8SKIP(s); | |
a0d0e21e | 1098 | } |
a0d0e21e | 1099 | } |
ffc61ed2 JH |
1100 | else { |
1101 | while (s < strend) { | |
1102 | if (isALNUM_LC(*s)) { | |
1103 | if (tmp && (norun || regtry(prog, s))) | |
1104 | goto got_it; | |
1105 | else | |
1106 | tmp = doevery; | |
1107 | } | |
a0ed51b3 | 1108 | else |
ffc61ed2 JH |
1109 | tmp = 1; |
1110 | s++; | |
a0ed51b3 | 1111 | } |
a0ed51b3 LW |
1112 | } |
1113 | break; | |
a0d0e21e | 1114 | case NALNUM: |
ffc61ed2 | 1115 | if (do_utf8) { |
8269fa76 | 1116 | LOAD_UTF8_CHARCLASS(alnum,"a"); |
ffc61ed2 | 1117 | while (s < strend) { |
3568d838 | 1118 | if (!swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8)) { |
ffc61ed2 JH |
1119 | if (tmp && (norun || regtry(prog, s))) |
1120 | goto got_it; | |
1121 | else | |
1122 | tmp = doevery; | |
1123 | } | |
bbce6d69 | 1124 | else |
ffc61ed2 JH |
1125 | tmp = 1; |
1126 | s += UTF8SKIP(s); | |
bbce6d69 | 1127 | } |
bbce6d69 | 1128 | } |
ffc61ed2 JH |
1129 | else { |
1130 | while (s < strend) { | |
1131 | if (!isALNUM(*s)) { | |
1132 | if (tmp && (norun || regtry(prog, s))) | |
1133 | goto got_it; | |
1134 | else | |
1135 | tmp = doevery; | |
1136 | } | |
a0ed51b3 | 1137 | else |
ffc61ed2 JH |
1138 | tmp = 1; |
1139 | s++; | |
a0ed51b3 | 1140 | } |
a0ed51b3 LW |
1141 | } |
1142 | break; | |
bbce6d69 | 1143 | case NALNUML: |
3280af22 | 1144 | PL_reg_flags |= RF_tainted; |
ffc61ed2 JH |
1145 | if (do_utf8) { |
1146 | while (s < strend) { | |
1147 | if (!isALNUM_LC_utf8((U8*)s)) { | |
1148 | if (tmp && (norun || regtry(prog, s))) | |
1149 | goto got_it; | |
1150 | else | |
1151 | tmp = doevery; | |
1152 | } | |
a687059c | 1153 | else |
ffc61ed2 JH |
1154 | tmp = 1; |
1155 | s += UTF8SKIP(s); | |
a687059c | 1156 | } |
a0d0e21e | 1157 | } |
ffc61ed2 JH |
1158 | else { |
1159 | while (s < strend) { | |
1160 | if (!isALNUM_LC(*s)) { | |
1161 | if (tmp && (norun || regtry(prog, s))) | |
1162 | goto got_it; | |
1163 | else | |
1164 | tmp = doevery; | |
1165 | } | |
a0ed51b3 | 1166 | else |
ffc61ed2 JH |
1167 | tmp = 1; |
1168 | s++; | |
a0ed51b3 | 1169 | } |
a0ed51b3 LW |
1170 | } |
1171 | break; | |
a0d0e21e | 1172 | case SPACE: |
ffc61ed2 | 1173 | if (do_utf8) { |
8269fa76 | 1174 | LOAD_UTF8_CHARCLASS(space," "); |
ffc61ed2 | 1175 | while (s < strend) { |
3568d838 | 1176 | if (*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s, do_utf8)) { |
ffc61ed2 JH |
1177 | if (tmp && (norun || regtry(prog, s))) |
1178 | goto got_it; | |
1179 | else | |
1180 | tmp = doevery; | |
1181 | } | |
a0d0e21e | 1182 | else |
ffc61ed2 JH |
1183 | tmp = 1; |
1184 | s += UTF8SKIP(s); | |
2304df62 | 1185 | } |
a0d0e21e | 1186 | } |
ffc61ed2 JH |
1187 | else { |
1188 | while (s < strend) { | |
1189 | if (isSPACE(*s)) { | |
1190 | if (tmp && (norun || regtry(prog, s))) | |
1191 | goto got_it; | |
1192 | else | |
1193 | tmp = doevery; | |
1194 | } | |
a0ed51b3 | 1195 | else |
ffc61ed2 JH |
1196 | tmp = 1; |
1197 | s++; | |
a0ed51b3 | 1198 | } |
a0ed51b3 LW |
1199 | } |
1200 | break; | |
bbce6d69 | 1201 | case SPACEL: |
3280af22 | 1202 | PL_reg_flags |= RF_tainted; |
ffc61ed2 JH |
1203 | if (do_utf8) { |
1204 | while (s < strend) { | |
1205 | if (*s == ' ' || isSPACE_LC_utf8((U8*)s)) { | |
1206 | if (tmp && (norun || regtry(prog, s))) | |
1207 | goto got_it; | |
1208 | else | |
1209 | tmp = doevery; | |
1210 | } | |
bbce6d69 | 1211 | else |
ffc61ed2 JH |
1212 | tmp = 1; |
1213 | s += UTF8SKIP(s); | |
bbce6d69 | 1214 | } |
bbce6d69 | 1215 | } |
ffc61ed2 JH |
1216 | else { |
1217 | while (s < strend) { | |
1218 | if (isSPACE_LC(*s)) { | |
1219 | if (tmp && (norun || regtry(prog, s))) | |
1220 | goto got_it; | |
1221 | else | |
1222 | tmp = doevery; | |
1223 | } | |
a0ed51b3 | 1224 | else |
ffc61ed2 JH |
1225 | tmp = 1; |
1226 | s++; | |
a0ed51b3 | 1227 | } |
a0ed51b3 LW |
1228 | } |
1229 | break; | |
a0d0e21e | 1230 | case NSPACE: |
ffc61ed2 | 1231 | if (do_utf8) { |
8269fa76 | 1232 | LOAD_UTF8_CHARCLASS(space," "); |
ffc61ed2 | 1233 | while (s < strend) { |
3568d838 | 1234 | if (!(*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s, do_utf8))) { |
ffc61ed2 JH |
1235 | if (tmp && (norun || regtry(prog, s))) |
1236 | goto got_it; | |
1237 | else | |
1238 | tmp = doevery; | |
1239 | } | |
a0d0e21e | 1240 | else |
ffc61ed2 JH |
1241 | tmp = 1; |
1242 | s += UTF8SKIP(s); | |
a687059c | 1243 | } |
a0d0e21e | 1244 | } |
ffc61ed2 JH |
1245 | else { |
1246 | while (s < strend) { | |
1247 | if (!isSPACE(*s)) { | |
1248 | if (tmp && (norun || regtry(prog, s))) | |
1249 | goto got_it; | |
1250 | else | |
1251 | tmp = doevery; | |
1252 | } | |
a0ed51b3 | 1253 | else |
ffc61ed2 JH |
1254 | tmp = 1; |
1255 | s++; | |
a0ed51b3 | 1256 | } |
a0ed51b3 LW |
1257 | } |
1258 | break; | |
bbce6d69 | 1259 | case NSPACEL: |
3280af22 | 1260 | PL_reg_flags |= RF_tainted; |
ffc61ed2 JH |
1261 | if (do_utf8) { |
1262 | while (s < strend) { | |
1263 | if (!(*s == ' ' || isSPACE_LC_utf8((U8*)s))) { | |
1264 | if (tmp && (norun || regtry(prog, s))) | |
1265 | goto got_it; | |
1266 | else | |
1267 | tmp = doevery; | |
1268 | } | |
bbce6d69 | 1269 | else |
ffc61ed2 JH |
1270 | tmp = 1; |
1271 | s += UTF8SKIP(s); | |
bbce6d69 | 1272 | } |
bbce6d69 | 1273 | } |
ffc61ed2 JH |
1274 | else { |
1275 | while (s < strend) { | |
1276 | if (!isSPACE_LC(*s)) { | |
1277 | if (tmp && (norun || regtry(prog, s))) | |
1278 | goto got_it; | |
1279 | else | |
1280 | tmp = doevery; | |
1281 | } | |
a0ed51b3 | 1282 | else |
ffc61ed2 JH |
1283 | tmp = 1; |
1284 | s++; | |
a0ed51b3 | 1285 | } |
a0ed51b3 LW |
1286 | } |
1287 | break; | |
a0d0e21e | 1288 | case DIGIT: |
ffc61ed2 | 1289 | if (do_utf8) { |
8269fa76 | 1290 | LOAD_UTF8_CHARCLASS(digit,"0"); |
ffc61ed2 | 1291 | while (s < strend) { |
3568d838 | 1292 | if (swash_fetch(PL_utf8_digit,(U8*)s, do_utf8)) { |
ffc61ed2 JH |
1293 | if (tmp && (norun || regtry(prog, s))) |
1294 | goto got_it; | |
1295 | else | |
1296 | tmp = doevery; | |
1297 | } | |
a0d0e21e | 1298 | else |
ffc61ed2 JH |
1299 | tmp = 1; |
1300 | s += UTF8SKIP(s); | |
2b69d0c2 | 1301 | } |
a0d0e21e | 1302 | } |
ffc61ed2 JH |
1303 | else { |
1304 | while (s < strend) { | |
1305 | if (isDIGIT(*s)) { | |
1306 | if (tmp && (norun || regtry(prog, s))) | |
1307 | goto got_it; | |
1308 | else | |
1309 | tmp = doevery; | |
1310 | } | |
a0ed51b3 | 1311 | else |
ffc61ed2 JH |
1312 | tmp = 1; |
1313 | s++; | |
a0ed51b3 | 1314 | } |
a0ed51b3 LW |
1315 | } |
1316 | break; | |
b8c5462f JH |
1317 | case DIGITL: |
1318 | PL_reg_flags |= RF_tainted; | |
ffc61ed2 JH |
1319 | if (do_utf8) { |
1320 | while (s < strend) { | |
1321 | if (isDIGIT_LC_utf8((U8*)s)) { | |
1322 | if (tmp && (norun || regtry(prog, s))) | |
1323 | goto got_it; | |
1324 | else | |
1325 | tmp = doevery; | |
1326 | } | |
b8c5462f | 1327 | else |
ffc61ed2 JH |
1328 | tmp = 1; |
1329 | s += UTF8SKIP(s); | |
b8c5462f | 1330 | } |
b8c5462f | 1331 | } |
ffc61ed2 JH |
1332 | else { |
1333 | while (s < strend) { | |
1334 | if (isDIGIT_LC(*s)) { | |
1335 | if (tmp && (norun || regtry(prog, s))) | |
1336 | goto got_it; | |
1337 | else | |
1338 | tmp = doevery; | |
1339 | } | |
b8c5462f | 1340 | else |
ffc61ed2 JH |
1341 | tmp = 1; |
1342 | s++; | |
b8c5462f | 1343 | } |
b8c5462f JH |
1344 | } |
1345 | break; | |
a0d0e21e | 1346 | case NDIGIT: |
ffc61ed2 | 1347 | if (do_utf8) { |
8269fa76 | 1348 | LOAD_UTF8_CHARCLASS(digit,"0"); |
ffc61ed2 | 1349 | while (s < strend) { |
3568d838 | 1350 | if (!swash_fetch(PL_utf8_digit,(U8*)s, do_utf8)) { |
ffc61ed2 JH |
1351 | if (tmp && (norun || regtry(prog, s))) |
1352 | goto got_it; | |
1353 | else | |
1354 | tmp = doevery; | |
1355 | } | |
a0d0e21e | 1356 | else |
ffc61ed2 JH |
1357 | tmp = 1; |
1358 | s += UTF8SKIP(s); | |
a687059c | 1359 | } |
a0d0e21e | 1360 | } |
ffc61ed2 JH |
1361 | else { |
1362 | while (s < strend) { | |
1363 | if (!isDIGIT(*s)) { | |
1364 | if (tmp && (norun || regtry(prog, s))) | |
1365 | goto got_it; | |
1366 | else | |
1367 | tmp = doevery; | |
1368 | } | |
a0ed51b3 | 1369 | else |
ffc61ed2 JH |
1370 | tmp = 1; |
1371 | s++; | |
a0ed51b3 | 1372 | } |
a0ed51b3 LW |
1373 | } |
1374 | break; | |
b8c5462f JH |
1375 | case NDIGITL: |
1376 | PL_reg_flags |= RF_tainted; | |
ffc61ed2 JH |
1377 | if (do_utf8) { |
1378 | while (s < strend) { | |
1379 | if (!isDIGIT_LC_utf8((U8*)s)) { | |
1380 | if (tmp && (norun || regtry(prog, s))) | |
1381 | goto got_it; | |
1382 | else | |
1383 | tmp = doevery; | |
1384 | } | |
b8c5462f | 1385 | else |
ffc61ed2 JH |
1386 | tmp = 1; |
1387 | s += UTF8SKIP(s); | |
b8c5462f | 1388 | } |
a0ed51b3 | 1389 | } |
ffc61ed2 JH |
1390 | else { |
1391 | while (s < strend) { | |
1392 | if (!isDIGIT_LC(*s)) { | |
1393 | if (tmp && (norun || regtry(prog, s))) | |
1394 | goto got_it; | |
1395 | else | |
1396 | tmp = doevery; | |
1397 | } | |
cf93c79d | 1398 | else |
ffc61ed2 JH |
1399 | tmp = 1; |
1400 | s++; | |
b8c5462f | 1401 | } |
b8c5462f JH |
1402 | } |
1403 | break; | |
b3c9acc1 | 1404 | default: |
3c3eec57 GS |
1405 | Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c)); |
1406 | break; | |
d6a28714 | 1407 | } |
6eb5f6b9 JH |
1408 | return 0; |
1409 | got_it: | |
1410 | return s; | |
1411 | } | |
1412 | ||
1413 | /* | |
1414 | - regexec_flags - match a regexp against a string | |
1415 | */ | |
1416 | I32 | |
1417 | Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char *strend, | |
1418 | char *strbeg, I32 minend, SV *sv, void *data, U32 flags) | |
1419 | /* strend: pointer to null at end of string */ | |
1420 | /* strbeg: real beginning of string */ | |
1421 | /* minend: end of match must be >=minend after stringarg. */ | |
1422 | /* data: May be used for some additional optimizations. */ | |
1423 | /* nosave: For optimizations. */ | |
1424 | { | |
6eb5f6b9 JH |
1425 | register char *s; |
1426 | register regnode *c; | |
1427 | register char *startpos = stringarg; | |
6eb5f6b9 JH |
1428 | I32 minlen; /* must match at least this many chars */ |
1429 | I32 dontbother = 0; /* how many characters not to try at end */ | |
155aba94 | 1430 | /* I32 start_shift = 0; */ /* Offset of the start to find |
6eb5f6b9 JH |
1431 | constant substr. */ /* CC */ |
1432 | I32 end_shift = 0; /* Same for the end. */ /* CC */ | |
1433 | I32 scream_pos = -1; /* Internal iterator of scream. */ | |
1434 | char *scream_olds; | |
1435 | SV* oreplsv = GvSV(PL_replgv); | |
1aa99e6b | 1436 | bool do_utf8 = DO_UTF8(sv); |
6eb5f6b9 JH |
1437 | |
1438 | PL_regcc = 0; | |
1439 | ||
1440 | cache_re(prog); | |
1441 | #ifdef DEBUGGING | |
aea4f609 | 1442 | PL_regnarrate = DEBUG_r_TEST; |
6eb5f6b9 JH |
1443 | #endif |
1444 | ||
1445 | /* Be paranoid... */ | |
1446 | if (prog == NULL || startpos == NULL) { | |
1447 | Perl_croak(aTHX_ "NULL regexp parameter"); | |
1448 | return 0; | |
1449 | } | |
1450 | ||
1451 | minlen = prog->minlen; | |
f33976b4 | 1452 | if (do_utf8 && !(prog->reganch & ROPT_CANY_SEEN)) { |
3baa4c62 | 1453 | if (utf8_distance((U8*)strend, (U8*)startpos) < minlen) goto phooey; |
1aa99e6b IH |
1454 | } |
1455 | else { | |
f33976b4 | 1456 | if (strend - startpos < minlen) goto phooey; |
1aa99e6b | 1457 | } |
6eb5f6b9 | 1458 | |
6eb5f6b9 JH |
1459 | /* Check validity of program. */ |
1460 | if (UCHARAT(prog->program) != REG_MAGIC) { | |
1461 | Perl_croak(aTHX_ "corrupted regexp program"); | |
1462 | } | |
1463 | ||
1464 | PL_reg_flags = 0; | |
1465 | PL_reg_eval_set = 0; | |
1466 | PL_reg_maxiter = 0; | |
1467 | ||
1468 | if (prog->reganch & ROPT_UTF8) | |
1469 | PL_reg_flags |= RF_utf8; | |
1470 | ||
1471 | /* Mark beginning of line for ^ and lookbehind. */ | |
1472 | PL_regbol = startpos; | |
1473 | PL_bostr = strbeg; | |
1474 | PL_reg_sv = sv; | |
1475 | ||
1476 | /* Mark end of line for $ (and such) */ | |
1477 | PL_regeol = strend; | |
1478 | ||
1479 | /* see how far we have to get to not match where we matched before */ | |
1480 | PL_regtill = startpos+minend; | |
1481 | ||
1482 | /* We start without call_cc context. */ | |
1483 | PL_reg_call_cc = 0; | |
1484 | ||
1485 | /* If there is a "must appear" string, look for it. */ | |
1486 | s = startpos; | |
1487 | ||
1488 | if (prog->reganch & ROPT_GPOS_SEEN) { /* Need to have PL_reg_ganch */ | |
1489 | MAGIC *mg; | |
1490 | ||
1491 | if (flags & REXEC_IGNOREPOS) /* Means: check only at start */ | |
1492 | PL_reg_ganch = startpos; | |
1493 | else if (sv && SvTYPE(sv) >= SVt_PVMG | |
1494 | && SvMAGIC(sv) | |
14befaf4 DM |
1495 | && (mg = mg_find(sv, PERL_MAGIC_regex_global)) |
1496 | && mg->mg_len >= 0) { | |
6eb5f6b9 JH |
1497 | PL_reg_ganch = strbeg + mg->mg_len; /* Defined pos() */ |
1498 | if (prog->reganch & ROPT_ANCH_GPOS) { | |
f33976b4 | 1499 | if (s > PL_reg_ganch) |
6eb5f6b9 JH |
1500 | goto phooey; |
1501 | s = PL_reg_ganch; | |
1502 | } | |
1503 | } | |
1504 | else /* pos() not defined */ | |
1505 | PL_reg_ganch = strbeg; | |
1506 | } | |
1507 | ||
699c3c34 JH |
1508 | if (do_utf8 == (UTF!=0) && |
1509 | !(flags & REXEC_CHECKED) && prog->check_substr != Nullsv) { | |
6eb5f6b9 JH |
1510 | re_scream_pos_data d; |
1511 | ||
1512 | d.scream_olds = &scream_olds; | |
1513 | d.scream_pos = &scream_pos; | |
1514 | s = re_intuit_start(prog, sv, s, strend, flags, &d); | |
1515 | if (!s) | |
1516 | goto phooey; /* not present */ | |
1517 | } | |
1518 | ||
1519 | DEBUG_r( if (!PL_colorset) reginitcolors() ); | |
1520 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
1521 | "%sMatching REx%s `%s%.60s%s%s' against `%s%.*s%s%s'\n", | |
1522 | PL_colors[4],PL_colors[5],PL_colors[0], | |
1523 | prog->precomp, | |
1524 | PL_colors[1], | |
1525 | (strlen(prog->precomp) > 60 ? "..." : ""), | |
1526 | PL_colors[0], | |
1527 | (int)(strend - startpos > 60 ? 60 : strend - startpos), | |
1528 | startpos, PL_colors[1], | |
1529 | (strend - startpos > 60 ? "..." : "")) | |
1530 | ); | |
1531 | ||
1532 | /* Simplest case: anchored match need be tried only once. */ | |
1533 | /* [unless only anchor is BOL and multiline is set] */ | |
1534 | if (prog->reganch & (ROPT_ANCH & ~ROPT_ANCH_GPOS)) { | |
1535 | if (s == startpos && regtry(prog, startpos)) | |
1536 | goto got_it; | |
1537 | else if (PL_multiline || (prog->reganch & ROPT_IMPLICIT) | |
1538 | || (prog->reganch & ROPT_ANCH_MBOL)) /* XXXX SBOL? */ | |
1539 | { | |
1540 | char *end; | |
1541 | ||
1542 | if (minlen) | |
1543 | dontbother = minlen - 1; | |
1aa99e6b | 1544 | end = HOP3c(strend, -dontbother, strbeg) - 1; |
6eb5f6b9 JH |
1545 | /* for multiline we only have to try after newlines */ |
1546 | if (prog->check_substr) { | |
1547 | if (s == startpos) | |
1548 | goto after_try; | |
1549 | while (1) { | |
1550 | if (regtry(prog, s)) | |
1551 | goto got_it; | |
1552 | after_try: | |
1553 | if (s >= end) | |
1554 | goto phooey; | |
1555 | if (prog->reganch & RE_USE_INTUIT) { | |
1556 | s = re_intuit_start(prog, sv, s + 1, strend, flags, NULL); | |
1557 | if (!s) | |
1558 | goto phooey; | |
1559 | } | |
1560 | else | |
1561 | s++; | |
1562 | } | |
1563 | } else { | |
1564 | if (s > startpos) | |
1565 | s--; | |
1566 | while (s < end) { | |
1567 | if (*s++ == '\n') { /* don't need PL_utf8skip here */ | |
1568 | if (regtry(prog, s)) | |
1569 | goto got_it; | |
1570 | } | |
1571 | } | |
1572 | } | |
1573 | } | |
1574 | goto phooey; | |
1575 | } else if (prog->reganch & ROPT_ANCH_GPOS) { | |
1576 | if (regtry(prog, PL_reg_ganch)) | |
1577 | goto got_it; | |
1578 | goto phooey; | |
1579 | } | |
1580 | ||
1581 | /* Messy cases: unanchored match. */ | |
9041c2e3 | 1582 | if (prog->anchored_substr && prog->reganch & ROPT_SKIP) { |
6eb5f6b9 JH |
1583 | /* we have /x+whatever/ */ |
1584 | /* it must be a one character string (XXXX Except UTF?) */ | |
1585 | char ch = SvPVX(prog->anchored_substr)[0]; | |
bf93d4cc GS |
1586 | #ifdef DEBUGGING |
1587 | int did_match = 0; | |
1588 | #endif | |
1589 | ||
1aa99e6b | 1590 | if (do_utf8) { |
6eb5f6b9 JH |
1591 | while (s < strend) { |
1592 | if (*s == ch) { | |
bf93d4cc | 1593 | DEBUG_r( did_match = 1 ); |
6eb5f6b9 JH |
1594 | if (regtry(prog, s)) goto got_it; |
1595 | s += UTF8SKIP(s); | |
1596 | while (s < strend && *s == ch) | |
1597 | s += UTF8SKIP(s); | |
1598 | } | |
1599 | s += UTF8SKIP(s); | |
1600 | } | |
1601 | } | |
1602 | else { | |
1603 | while (s < strend) { | |
1604 | if (*s == ch) { | |
bf93d4cc | 1605 | DEBUG_r( did_match = 1 ); |
6eb5f6b9 JH |
1606 | if (regtry(prog, s)) goto got_it; |
1607 | s++; | |
1608 | while (s < strend && *s == ch) | |
1609 | s++; | |
1610 | } | |
1611 | s++; | |
1612 | } | |
1613 | } | |
b7953727 | 1614 | DEBUG_r(if (!did_match) |
bf93d4cc | 1615 | PerlIO_printf(Perl_debug_log, |
b7953727 JH |
1616 | "Did not find anchored character...\n") |
1617 | ); | |
6eb5f6b9 JH |
1618 | } |
1619 | /*SUPPRESS 560*/ | |
1aa99e6b IH |
1620 | else if (do_utf8 == (UTF!=0) && |
1621 | (prog->anchored_substr != Nullsv | |
9041c2e3 | 1622 | || (prog->float_substr != Nullsv |
1aa99e6b | 1623 | && prog->float_max_offset < strend - s))) { |
9041c2e3 | 1624 | SV *must = prog->anchored_substr |
6eb5f6b9 | 1625 | ? prog->anchored_substr : prog->float_substr; |
9041c2e3 | 1626 | I32 back_max = |
6eb5f6b9 | 1627 | prog->anchored_substr ? prog->anchored_offset : prog->float_max_offset; |
9041c2e3 | 1628 | I32 back_min = |
6eb5f6b9 | 1629 | prog->anchored_substr ? prog->anchored_offset : prog->float_min_offset; |
1aa99e6b | 1630 | char *last = HOP3c(strend, /* Cannot start after this */ |
6eb5f6b9 | 1631 | -(I32)(CHR_SVLEN(must) |
1aa99e6b | 1632 | - (SvTAIL(must) != 0) + back_min), strbeg); |
6eb5f6b9 | 1633 | char *last1; /* Last position checked before */ |
bf93d4cc GS |
1634 | #ifdef DEBUGGING |
1635 | int did_match = 0; | |
1636 | #endif | |
6eb5f6b9 JH |
1637 | |
1638 | if (s > PL_bostr) | |
1639 | last1 = HOPc(s, -1); | |
1640 | else | |
1641 | last1 = s - 1; /* bogus */ | |
1642 | ||
1643 | /* XXXX check_substr already used to find `s', can optimize if | |
1644 | check_substr==must. */ | |
1645 | scream_pos = -1; | |
1646 | dontbother = end_shift; | |
1647 | strend = HOPc(strend, -dontbother); | |
1648 | while ( (s <= last) && | |
9041c2e3 | 1649 | ((flags & REXEC_SCREAM) |
1aa99e6b | 1650 | ? (s = screaminstr(sv, must, HOP3c(s, back_min, strend) - strbeg, |
6eb5f6b9 | 1651 | end_shift, &scream_pos, 0)) |
1aa99e6b | 1652 | : (s = fbm_instr((unsigned char*)HOP3(s, back_min, strend), |
9041c2e3 | 1653 | (unsigned char*)strend, must, |
6eb5f6b9 | 1654 | PL_multiline ? FBMrf_MULTILINE : 0))) ) { |
bf93d4cc | 1655 | DEBUG_r( did_match = 1 ); |
6eb5f6b9 JH |
1656 | if (HOPc(s, -back_max) > last1) { |
1657 | last1 = HOPc(s, -back_min); | |
1658 | s = HOPc(s, -back_max); | |
1659 | } | |
1660 | else { | |
1661 | char *t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1; | |
1662 | ||
1663 | last1 = HOPc(s, -back_min); | |
1664 | s = t; | |
1665 | } | |
1aa99e6b | 1666 | if (do_utf8) { |
6eb5f6b9 JH |
1667 | while (s <= last1) { |
1668 | if (regtry(prog, s)) | |
1669 | goto got_it; | |
1670 | s += UTF8SKIP(s); | |
1671 | } | |
1672 | } | |
1673 | else { | |
1674 | while (s <= last1) { | |
1675 | if (regtry(prog, s)) | |
1676 | goto got_it; | |
1677 | s++; | |
1678 | } | |
1679 | } | |
1680 | } | |
b7953727 JH |
1681 | DEBUG_r(if (!did_match) |
1682 | PerlIO_printf(Perl_debug_log, | |
1683 | "Did not find %s substr `%s%.*s%s'%s...\n", | |
bf93d4cc GS |
1684 | ((must == prog->anchored_substr) |
1685 | ? "anchored" : "floating"), | |
1686 | PL_colors[0], | |
1687 | (int)(SvCUR(must) - (SvTAIL(must)!=0)), | |
1688 | SvPVX(must), | |
b7953727 JH |
1689 | PL_colors[1], (SvTAIL(must) ? "$" : "")) |
1690 | ); | |
6eb5f6b9 JH |
1691 | goto phooey; |
1692 | } | |
155aba94 | 1693 | else if ((c = prog->regstclass)) { |
66e933ab GS |
1694 | if (minlen && PL_regkind[(U8)OP(prog->regstclass)] != EXACT) |
1695 | /* don't bother with what can't match */ | |
6eb5f6b9 | 1696 | strend = HOPc(strend, -(minlen - 1)); |
ffc61ed2 JH |
1697 | DEBUG_r({ |
1698 | SV *prop = sv_newmortal(); | |
1699 | regprop(prop, c); | |
1700 | PerlIO_printf(Perl_debug_log, "Matching stclass `%s' against `%s'\n", SvPVX(prop), s); | |
1701 | }); | |
6eb5f6b9 JH |
1702 | if (find_byclass(prog, c, s, strend, startpos, 0)) |
1703 | goto got_it; | |
bf93d4cc | 1704 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass...\n")); |
d6a28714 JH |
1705 | } |
1706 | else { | |
1707 | dontbother = 0; | |
1708 | if (prog->float_substr != Nullsv) { /* Trim the end. */ | |
1709 | char *last; | |
d6a28714 JH |
1710 | |
1711 | if (flags & REXEC_SCREAM) { | |
1712 | last = screaminstr(sv, prog->float_substr, s - strbeg, | |
1713 | end_shift, &scream_pos, 1); /* last one */ | |
1714 | if (!last) | |
ffc61ed2 | 1715 | last = scream_olds; /* Only one occurrence. */ |
b8c5462f | 1716 | } |
d6a28714 JH |
1717 | else { |
1718 | STRLEN len; | |
1719 | char *little = SvPV(prog->float_substr, len); | |
1720 | ||
1721 | if (SvTAIL(prog->float_substr)) { | |
1722 | if (memEQ(strend - len + 1, little, len - 1)) | |
1723 | last = strend - len + 1; | |
1724 | else if (!PL_multiline) | |
9041c2e3 | 1725 | last = memEQ(strend - len, little, len) |
d6a28714 | 1726 | ? strend - len : Nullch; |
b8c5462f | 1727 | else |
d6a28714 JH |
1728 | goto find_last; |
1729 | } else { | |
1730 | find_last: | |
9041c2e3 | 1731 | if (len) |
d6a28714 | 1732 | last = rninstr(s, strend, little, little + len); |
b8c5462f | 1733 | else |
d6a28714 | 1734 | last = strend; /* matching `$' */ |
b8c5462f | 1735 | } |
b8c5462f | 1736 | } |
bf93d4cc GS |
1737 | if (last == NULL) { |
1738 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
1739 | "%sCan't trim the tail, match fails (should not happen)%s\n", | |
1740 | PL_colors[4],PL_colors[5])); | |
1741 | goto phooey; /* Should not happen! */ | |
1742 | } | |
d6a28714 JH |
1743 | dontbother = strend - last + prog->float_min_offset; |
1744 | } | |
1745 | if (minlen && (dontbother < minlen)) | |
1746 | dontbother = minlen - 1; | |
1747 | strend -= dontbother; /* this one's always in bytes! */ | |
1748 | /* We don't know much -- general case. */ | |
1aa99e6b | 1749 | if (do_utf8) { |
d6a28714 JH |
1750 | for (;;) { |
1751 | if (regtry(prog, s)) | |
1752 | goto got_it; | |
1753 | if (s >= strend) | |
1754 | break; | |
b8c5462f | 1755 | s += UTF8SKIP(s); |
d6a28714 JH |
1756 | }; |
1757 | } | |
1758 | else { | |
1759 | do { | |
1760 | if (regtry(prog, s)) | |
1761 | goto got_it; | |
1762 | } while (s++ < strend); | |
1763 | } | |
1764 | } | |
1765 | ||
1766 | /* Failure. */ | |
1767 | goto phooey; | |
1768 | ||
1769 | got_it: | |
1770 | RX_MATCH_TAINTED_set(prog, PL_reg_flags & RF_tainted); | |
1771 | ||
1772 | if (PL_reg_eval_set) { | |
1773 | /* Preserve the current value of $^R */ | |
1774 | if (oreplsv != GvSV(PL_replgv)) | |
1775 | sv_setsv(oreplsv, GvSV(PL_replgv));/* So that when GvSV(replgv) is | |
1776 | restored, the value remains | |
1777 | the same. */ | |
acfe0abc | 1778 | restore_pos(aTHX_ 0); |
d6a28714 JH |
1779 | } |
1780 | ||
1781 | /* make sure $`, $&, $', and $digit will work later */ | |
1782 | if ( !(flags & REXEC_NOT_FIRST) ) { | |
1783 | if (RX_MATCH_COPIED(prog)) { | |
1784 | Safefree(prog->subbeg); | |
1785 | RX_MATCH_COPIED_off(prog); | |
1786 | } | |
1787 | if (flags & REXEC_COPY_STR) { | |
1788 | I32 i = PL_regeol - startpos + (stringarg - strbeg); | |
1789 | ||
1790 | s = savepvn(strbeg, i); | |
1791 | prog->subbeg = s; | |
1792 | prog->sublen = i; | |
1793 | RX_MATCH_COPIED_on(prog); | |
1794 | } | |
1795 | else { | |
1796 | prog->subbeg = strbeg; | |
1797 | prog->sublen = PL_regeol - strbeg; /* strend may have been modified */ | |
1798 | } | |
1799 | } | |
9041c2e3 | 1800 | |
d6a28714 JH |
1801 | return 1; |
1802 | ||
1803 | phooey: | |
bf93d4cc GS |
1804 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n", |
1805 | PL_colors[4],PL_colors[5])); | |
d6a28714 | 1806 | if (PL_reg_eval_set) |
acfe0abc | 1807 | restore_pos(aTHX_ 0); |
d6a28714 JH |
1808 | return 0; |
1809 | } | |
1810 | ||
1811 | /* | |
1812 | - regtry - try match at specific point | |
1813 | */ | |
1814 | STATIC I32 /* 0 failure, 1 success */ | |
1815 | S_regtry(pTHX_ regexp *prog, char *startpos) | |
1816 | { | |
d6a28714 JH |
1817 | register I32 i; |
1818 | register I32 *sp; | |
1819 | register I32 *ep; | |
1820 | CHECKPOINT lastcp; | |
1821 | ||
02db2b7b IZ |
1822 | #ifdef DEBUGGING |
1823 | PL_regindent = 0; /* XXXX Not good when matches are reenterable... */ | |
1824 | #endif | |
d6a28714 JH |
1825 | if ((prog->reganch & ROPT_EVAL_SEEN) && !PL_reg_eval_set) { |
1826 | MAGIC *mg; | |
1827 | ||
1828 | PL_reg_eval_set = RS_init; | |
1829 | DEBUG_r(DEBUG_s( | |
b900a521 JH |
1830 | PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n", |
1831 | (IV)(PL_stack_sp - PL_stack_base)); | |
d6a28714 | 1832 | )); |
e8347627 | 1833 | SAVEI32(cxstack[cxstack_ix].blk_oldsp); |
d6a28714 JH |
1834 | cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base; |
1835 | /* Otherwise OP_NEXTSTATE will free whatever on stack now. */ | |
1836 | SAVETMPS; | |
1837 | /* Apparently this is not needed, judging by wantarray. */ | |
e8347627 | 1838 | /* SAVEI8(cxstack[cxstack_ix].blk_gimme); |
d6a28714 JH |
1839 | cxstack[cxstack_ix].blk_gimme = G_SCALAR; */ |
1840 | ||
1841 | if (PL_reg_sv) { | |
1842 | /* Make $_ available to executed code. */ | |
1843 | if (PL_reg_sv != DEFSV) { | |
4d1ff10f | 1844 | /* SAVE_DEFSV does *not* suffice here for USE_5005THREADS */ |
d6a28714 JH |
1845 | SAVESPTR(DEFSV); |
1846 | DEFSV = PL_reg_sv; | |
b8c5462f | 1847 | } |
d6a28714 | 1848 | |
9041c2e3 | 1849 | if (!(SvTYPE(PL_reg_sv) >= SVt_PVMG && SvMAGIC(PL_reg_sv) |
14befaf4 | 1850 | && (mg = mg_find(PL_reg_sv, PERL_MAGIC_regex_global)))) { |
d6a28714 | 1851 | /* prepare for quick setting of pos */ |
14befaf4 DM |
1852 | sv_magic(PL_reg_sv, (SV*)0, |
1853 | PERL_MAGIC_regex_global, Nullch, 0); | |
1854 | mg = mg_find(PL_reg_sv, PERL_MAGIC_regex_global); | |
d6a28714 | 1855 | mg->mg_len = -1; |
b8c5462f | 1856 | } |
d6a28714 JH |
1857 | PL_reg_magic = mg; |
1858 | PL_reg_oldpos = mg->mg_len; | |
c76ac1ee | 1859 | SAVEDESTRUCTOR_X(restore_pos, 0); |
d6a28714 | 1860 | } |
09687e5a | 1861 | if (!PL_reg_curpm) { |
0f79a09d | 1862 | Newz(22,PL_reg_curpm, 1, PMOP); |
09687e5a AB |
1863 | #ifdef USE_ITHREADS |
1864 | { | |
1865 | SV* repointer = newSViv(0); | |
577e12cc | 1866 | /* so we know which PL_regex_padav element is PL_reg_curpm */ |
35061a7e | 1867 | SvFLAGS(repointer) |= SVf_BREAK; |
09687e5a AB |
1868 | av_push(PL_regex_padav,repointer); |
1869 | PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav); | |
1870 | PL_regex_pad = AvARRAY(PL_regex_padav); | |
1871 | } | |
1872 | #endif | |
1873 | } | |
aaa362c4 | 1874 | PM_SETRE(PL_reg_curpm, prog); |
d6a28714 JH |
1875 | PL_reg_oldcurpm = PL_curpm; |
1876 | PL_curpm = PL_reg_curpm; | |
1877 | if (RX_MATCH_COPIED(prog)) { | |
1878 | /* Here is a serious problem: we cannot rewrite subbeg, | |
1879 | since it may be needed if this match fails. Thus | |
1880 | $` inside (?{}) could fail... */ | |
1881 | PL_reg_oldsaved = prog->subbeg; | |
1882 | PL_reg_oldsavedlen = prog->sublen; | |
1883 | RX_MATCH_COPIED_off(prog); | |
1884 | } | |
1885 | else | |
1886 | PL_reg_oldsaved = Nullch; | |
1887 | prog->subbeg = PL_bostr; | |
1888 | prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */ | |
1889 | } | |
1890 | prog->startp[0] = startpos - PL_bostr; | |
1891 | PL_reginput = startpos; | |
1892 | PL_regstartp = prog->startp; | |
1893 | PL_regendp = prog->endp; | |
1894 | PL_reglastparen = &prog->lastparen; | |
a01268b5 | 1895 | PL_reglastcloseparen = &prog->lastcloseparen; |
d6a28714 JH |
1896 | prog->lastparen = 0; |
1897 | PL_regsize = 0; | |
1898 | DEBUG_r(PL_reg_starttry = startpos); | |
1899 | if (PL_reg_start_tmpl <= prog->nparens) { | |
1900 | PL_reg_start_tmpl = prog->nparens*3/2 + 3; | |
1901 | if(PL_reg_start_tmp) | |
1902 | Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*); | |
1903 | else | |
1904 | New(22,PL_reg_start_tmp, PL_reg_start_tmpl, char*); | |
1905 | } | |
1906 | ||
1907 | /* XXXX What this code is doing here?!!! There should be no need | |
1908 | to do this again and again, PL_reglastparen should take care of | |
3dd2943c | 1909 | this! --ilya*/ |
dafc8851 JH |
1910 | |
1911 | /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code. | |
1912 | * Actually, the code in regcppop() (which Ilya may be meaning by | |
daf18116 JH |
1913 | * PL_reglastparen), is not needed at all by the test suite |
1914 | * (op/regexp, op/pat, op/split), but that code is needed, oddly | |
1915 | * enough, for building DynaLoader, or otherwise this | |
1916 | * "Error: '*' not in typemap in DynaLoader.xs, line 164" | |
1917 | * will happen. Meanwhile, this code *is* needed for the | |
1918 | * above-mentioned test suite tests to succeed. The common theme | |
1919 | * on those tests seems to be returning null fields from matches. | |
1920 | * --jhi */ | |
dafc8851 | 1921 | #if 1 |
d6a28714 JH |
1922 | sp = prog->startp; |
1923 | ep = prog->endp; | |
1924 | if (prog->nparens) { | |
09e8ae3b | 1925 | for (i = prog->nparens; i > *PL_reglastparen; i--) { |
d6a28714 JH |
1926 | *++sp = -1; |
1927 | *++ep = -1; | |
1928 | } | |
1929 | } | |
dafc8851 | 1930 | #endif |
02db2b7b | 1931 | REGCP_SET(lastcp); |
d6a28714 JH |
1932 | if (regmatch(prog->program + 1)) { |
1933 | prog->endp[0] = PL_reginput - PL_bostr; | |
1934 | return 1; | |
1935 | } | |
02db2b7b | 1936 | REGCP_UNWIND(lastcp); |
d6a28714 JH |
1937 | return 0; |
1938 | } | |
1939 | ||
02db2b7b IZ |
1940 | #define RE_UNWIND_BRANCH 1 |
1941 | #define RE_UNWIND_BRANCHJ 2 | |
1942 | ||
1943 | union re_unwind_t; | |
1944 | ||
1945 | typedef struct { /* XX: makes sense to enlarge it... */ | |
1946 | I32 type; | |
1947 | I32 prev; | |
1948 | CHECKPOINT lastcp; | |
1949 | } re_unwind_generic_t; | |
1950 | ||
1951 | typedef struct { | |
1952 | I32 type; | |
1953 | I32 prev; | |
1954 | CHECKPOINT lastcp; | |
1955 | I32 lastparen; | |
1956 | regnode *next; | |
1957 | char *locinput; | |
1958 | I32 nextchr; | |
1959 | #ifdef DEBUGGING | |
1960 | int regindent; | |
1961 | #endif | |
1962 | } re_unwind_branch_t; | |
1963 | ||
1964 | typedef union re_unwind_t { | |
1965 | I32 type; | |
1966 | re_unwind_generic_t generic; | |
1967 | re_unwind_branch_t branch; | |
1968 | } re_unwind_t; | |
1969 | ||
8ba1375e MJD |
1970 | #define sayYES goto yes |
1971 | #define sayNO goto no | |
1972 | #define sayYES_FINAL goto yes_final | |
1973 | #define sayYES_LOUD goto yes_loud | |
1974 | #define sayNO_FINAL goto no_final | |
1975 | #define sayNO_SILENT goto do_no | |
1976 | #define saySAME(x) if (x) goto yes; else goto no | |
1977 | ||
1978 | #define REPORT_CODE_OFF 24 | |
1979 | ||
d6a28714 JH |
1980 | /* |
1981 | - regmatch - main matching routine | |
1982 | * | |
1983 | * Conceptually the strategy is simple: check to see whether the current | |
1984 | * node matches, call self recursively to see whether the rest matches, | |
1985 | * and then act accordingly. In practice we make some effort to avoid | |
1986 | * recursion, in particular by going through "ordinary" nodes (that don't | |
1987 | * need to know whether the rest of the match failed) by a loop instead of | |
1988 | * by recursion. | |
1989 | */ | |
1990 | /* [lwall] I've hoisted the register declarations to the outer block in order to | |
1991 | * maybe save a little bit of pushing and popping on the stack. It also takes | |
1992 | * advantage of machines that use a register save mask on subroutine entry. | |
1993 | */ | |
1994 | STATIC I32 /* 0 failure, 1 success */ | |
1995 | S_regmatch(pTHX_ regnode *prog) | |
1996 | { | |
d6a28714 JH |
1997 | register regnode *scan; /* Current node. */ |
1998 | regnode *next; /* Next node. */ | |
1999 | regnode *inner; /* Next node in internal branch. */ | |
2000 | register I32 nextchr; /* renamed nextchr - nextchar colides with | |
2001 | function of same name */ | |
2002 | register I32 n; /* no or next */ | |
b7953727 JH |
2003 | register I32 ln = 0; /* len or last */ |
2004 | register char *s = Nullch; /* operand or save */ | |
d6a28714 | 2005 | register char *locinput = PL_reginput; |
b7953727 | 2006 | register I32 c1 = 0, c2 = 0, paren; /* case fold search, parenth */ |
d6a28714 | 2007 | int minmod = 0, sw = 0, logical = 0; |
02db2b7b | 2008 | I32 unwind = 0; |
b7953727 | 2009 | #if 0 |
02db2b7b | 2010 | I32 firstcp = PL_savestack_ix; |
b7953727 | 2011 | #endif |
53c4c00c | 2012 | register bool do_utf8 = PL_reg_match_utf8; |
02db2b7b | 2013 | |
d6a28714 JH |
2014 | #ifdef DEBUGGING |
2015 | PL_regindent++; | |
2016 | #endif | |
2017 | ||
2018 | /* Note that nextchr is a byte even in UTF */ | |
2019 | nextchr = UCHARAT(locinput); | |
2020 | scan = prog; | |
2021 | while (scan != NULL) { | |
8ba1375e | 2022 | |
d6a28714 JH |
2023 | DEBUG_r( { |
2024 | SV *prop = sv_newmortal(); | |
2025 | int docolor = *PL_colors[0]; | |
2026 | int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */ | |
1aa99e6b | 2027 | int l = (PL_regeol - locinput) > taill ? taill : (PL_regeol - locinput); |
d6a28714 JH |
2028 | /* The part of the string before starttry has one color |
2029 | (pref0_len chars), between starttry and current | |
2030 | position another one (pref_len - pref0_len chars), | |
2031 | after the current position the third one. | |
2032 | We assume that pref0_len <= pref_len, otherwise we | |
2033 | decrease pref0_len. */ | |
9041c2e3 | 2034 | int pref_len = (locinput - PL_bostr) > (5 + taill) - l |
1aa99e6b IH |
2035 | ? (5 + taill) - l : locinput - PL_bostr; |
2036 | int pref0_len; | |
d6a28714 | 2037 | |
1aa99e6b IH |
2038 | while (UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len))) |
2039 | pref_len++; | |
2040 | pref0_len = pref_len - (locinput - PL_reg_starttry); | |
d6a28714 | 2041 | if (l + pref_len < (5 + taill) && l < PL_regeol - locinput) |
9041c2e3 | 2042 | l = ( PL_regeol - locinput > (5 + taill) - pref_len |
d6a28714 | 2043 | ? (5 + taill) - pref_len : PL_regeol - locinput); |
1aa99e6b IH |
2044 | while (UTF8_IS_CONTINUATION(*(U8*)(locinput + l))) |
2045 | l--; | |
d6a28714 JH |
2046 | if (pref0_len < 0) |
2047 | pref0_len = 0; | |
2048 | if (pref0_len > pref_len) | |
2049 | pref0_len = pref_len; | |
2050 | regprop(prop, scan); | |
9041c2e3 | 2051 | PerlIO_printf(Perl_debug_log, |
b900a521 | 2052 | "%4"IVdf" <%s%.*s%s%s%.*s%s%s%s%.*s%s>%*s|%3"IVdf":%*s%s\n", |
9041c2e3 NIS |
2053 | (IV)(locinput - PL_bostr), |
2054 | PL_colors[4], pref0_len, | |
d6a28714 | 2055 | locinput - pref_len, PL_colors[5], |
9041c2e3 | 2056 | PL_colors[2], pref_len - pref0_len, |
d6a28714 JH |
2057 | locinput - pref_len + pref0_len, PL_colors[3], |
2058 | (docolor ? "" : "> <"), | |
2059 | PL_colors[0], l, locinput, PL_colors[1], | |
2060 | 15 - l - pref_len + 1, | |
2061 | "", | |
b900a521 | 2062 | (IV)(scan - PL_regprogram), PL_regindent*2, "", |
d6a28714 JH |
2063 | SvPVX(prop)); |
2064 | } ); | |
2065 | ||
2066 | next = scan + NEXT_OFF(scan); | |
2067 | if (next == scan) | |
2068 | next = NULL; | |
2069 | ||
2070 | switch (OP(scan)) { | |
2071 | case BOL: | |
12d33761 HS |
2072 | if (locinput == PL_bostr || (PL_multiline && |
2073 | (nextchr || locinput < PL_regeol) && locinput[-1] == '\n') ) | |
d6a28714 JH |
2074 | { |
2075 | /* regtill = regbol; */ | |
b8c5462f JH |
2076 | break; |
2077 | } | |
d6a28714 JH |
2078 | sayNO; |
2079 | case MBOL: | |
12d33761 HS |
2080 | if (locinput == PL_bostr || |
2081 | ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n')) | |
d6a28714 | 2082 | { |
b8c5462f JH |
2083 | break; |
2084 | } | |
d6a28714 JH |
2085 | sayNO; |
2086 | case SBOL: | |
c2a73568 | 2087 | if (locinput == PL_bostr) |
b8c5462f | 2088 | break; |
d6a28714 JH |
2089 | sayNO; |
2090 | case GPOS: | |
2091 | if (locinput == PL_reg_ganch) | |
2092 | break; | |
2093 | sayNO; | |
2094 | case EOL: | |
2095 | if (PL_multiline) | |
2096 | goto meol; | |
2097 | else | |
2098 | goto seol; | |
2099 | case MEOL: | |
2100 | meol: | |
2101 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') | |
b8c5462f | 2102 | sayNO; |
b8c5462f | 2103 | break; |
d6a28714 JH |
2104 | case SEOL: |
2105 | seol: | |
2106 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') | |
b8c5462f | 2107 | sayNO; |
d6a28714 | 2108 | if (PL_regeol - locinput > 1) |
b8c5462f | 2109 | sayNO; |
b8c5462f | 2110 | break; |
d6a28714 JH |
2111 | case EOS: |
2112 | if (PL_regeol != locinput) | |
b8c5462f | 2113 | sayNO; |
d6a28714 | 2114 | break; |
ffc61ed2 | 2115 | case SANY: |
d6a28714 | 2116 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 | 2117 | sayNO; |
f33976b4 DB |
2118 | if (do_utf8) { |
2119 | locinput += PL_utf8skip[nextchr]; | |
2120 | if (locinput > PL_regeol) | |
2121 | sayNO; | |
2122 | nextchr = UCHARAT(locinput); | |
2123 | } | |
2124 | else | |
2125 | nextchr = UCHARAT(++locinput); | |
2126 | break; | |
2127 | case CANY: | |
2128 | if (!nextchr && locinput >= PL_regeol) | |
2129 | sayNO; | |
b8c5462f | 2130 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 2131 | break; |
ffc61ed2 | 2132 | case REG_ANY: |
1aa99e6b IH |
2133 | if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n') |
2134 | sayNO; | |
2135 | if (do_utf8) { | |
b8c5462f | 2136 | locinput += PL_utf8skip[nextchr]; |
d6a28714 JH |
2137 | if (locinput > PL_regeol) |
2138 | sayNO; | |
a0ed51b3 | 2139 | nextchr = UCHARAT(locinput); |
a0ed51b3 | 2140 | } |
1aa99e6b IH |
2141 | else |
2142 | nextchr = UCHARAT(++locinput); | |
a0ed51b3 | 2143 | break; |
d6a28714 | 2144 | case EXACT: |
cd439c50 IZ |
2145 | s = STRING(scan); |
2146 | ln = STR_LEN(scan); | |
1aa99e6b IH |
2147 | if (do_utf8 != (UTF!=0)) { |
2148 | char *l = locinput; | |
2149 | char *e = s + ln; | |
2150 | STRLEN len; | |
2151 | if (do_utf8) | |
2152 | while (s < e) { | |
2153 | if (l >= PL_regeol) | |
2154 | sayNO; | |
9041c2e3 | 2155 | if (*((U8*)s) != utf8_to_uvchr((U8*)l, &len)) |
1aa99e6b IH |
2156 | sayNO; |
2157 | s++; | |
2158 | l += len; | |
2159 | } | |
2160 | else | |
2161 | while (s < e) { | |
2162 | if (l >= PL_regeol) | |
2163 | sayNO; | |
9041c2e3 | 2164 | if (*((U8*)l) != utf8_to_uvchr((U8*)s, &len)) |
1aa99e6b IH |
2165 | sayNO; |
2166 | s += len; | |
2167 | l++; | |
2168 | } | |
2169 | locinput = l; | |
2170 | nextchr = UCHARAT(locinput); | |
2171 | break; | |
2172 | } | |
d6a28714 JH |
2173 | /* Inline the first character, for speed. */ |
2174 | if (UCHARAT(s) != nextchr) | |
2175 | sayNO; | |
2176 | if (PL_regeol - locinput < ln) | |
2177 | sayNO; | |
2178 | if (ln > 1 && memNE(s, locinput, ln)) | |
2179 | sayNO; | |
2180 | locinput += ln; | |
2181 | nextchr = UCHARAT(locinput); | |
2182 | break; | |
2183 | case EXACTFL: | |
b8c5462f JH |
2184 | PL_reg_flags |= RF_tainted; |
2185 | /* FALL THROUGH */ | |
d6a28714 | 2186 | case EXACTF: |
cd439c50 IZ |
2187 | s = STRING(scan); |
2188 | ln = STR_LEN(scan); | |
d6a28714 | 2189 | |
1aa99e6b | 2190 | if (do_utf8) { |
d6a28714 | 2191 | char *l = locinput; |
1aa99e6b IH |
2192 | char *e; |
2193 | e = s + ln; | |
d6a28714 JH |
2194 | c1 = OP(scan) == EXACTF; |
2195 | while (s < e) { | |
1aa99e6b | 2196 | if (l >= PL_regeol) { |
d6a28714 JH |
2197 | sayNO; |
2198 | } | |
2b9d42f0 | 2199 | if ((UTF ? utf8n_to_uvchr((U8*)s, e - s, 0, 0) : *((U8*)s)) != |
1aa99e6b IH |
2200 | (c1 ? toLOWER_utf8((U8*)l) : toLOWER_LC_utf8((U8*)l))) |
2201 | sayNO; | |
2202 | s += UTF ? UTF8SKIP(s) : 1; | |
d6a28714 | 2203 | l += UTF8SKIP(l); |
b8c5462f | 2204 | } |
d6a28714 | 2205 | locinput = l; |
a0ed51b3 LW |
2206 | nextchr = UCHARAT(locinput); |
2207 | break; | |
2208 | } | |
d6a28714 JH |
2209 | |
2210 | /* Inline the first character, for speed. */ | |
2211 | if (UCHARAT(s) != nextchr && | |
2212 | UCHARAT(s) != ((OP(scan) == EXACTF) | |
2213 | ? PL_fold : PL_fold_locale)[nextchr]) | |
a0ed51b3 | 2214 | sayNO; |
d6a28714 | 2215 | if (PL_regeol - locinput < ln) |
b8c5462f | 2216 | sayNO; |
d6a28714 JH |
2217 | if (ln > 1 && (OP(scan) == EXACTF |
2218 | ? ibcmp(s, locinput, ln) | |
2219 | : ibcmp_locale(s, locinput, ln))) | |
4633a7c4 | 2220 | sayNO; |
d6a28714 JH |
2221 | locinput += ln; |
2222 | nextchr = UCHARAT(locinput); | |
a0d0e21e | 2223 | break; |
d6a28714 | 2224 | case ANYOF: |
ffc61ed2 JH |
2225 | if (do_utf8) { |
2226 | if (!reginclass(scan, (U8*)locinput, do_utf8)) | |
2227 | sayNO; | |
2228 | if (locinput >= PL_regeol) | |
2229 | sayNO; | |
2230 | locinput += PL_utf8skip[nextchr]; | |
b8c5462f | 2231 | nextchr = UCHARAT(locinput); |
ffc61ed2 JH |
2232 | } |
2233 | else { | |
2234 | if (nextchr < 0) | |
2235 | nextchr = UCHARAT(locinput); | |
2236 | if (!reginclass(scan, (U8*)locinput, do_utf8)) | |
2237 | sayNO; | |
2238 | if (!nextchr && locinput >= PL_regeol) | |
2239 | sayNO; | |
2240 | nextchr = UCHARAT(++locinput); | |
2241 | } | |
b8c5462f | 2242 | break; |
d6a28714 | 2243 | case ALNUML: |
b8c5462f JH |
2244 | PL_reg_flags |= RF_tainted; |
2245 | /* FALL THROUGH */ | |
d6a28714 | 2246 | case ALNUM: |
b8c5462f | 2247 | if (!nextchr) |
4633a7c4 | 2248 | sayNO; |
ffc61ed2 | 2249 | if (do_utf8) { |
ad24be35 | 2250 | LOAD_UTF8_CHARCLASS(alnum,"a"); |
ffc61ed2 | 2251 | if (!(OP(scan) == ALNUM |
3568d838 | 2252 | ? swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8) |
d6a28714 | 2253 | : isALNUM_LC_utf8((U8*)locinput))) |
b8c5462f JH |
2254 | { |
2255 | sayNO; | |
a0ed51b3 | 2256 | } |
b8c5462f | 2257 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
2258 | nextchr = UCHARAT(locinput); |
2259 | break; | |
2260 | } | |
ffc61ed2 | 2261 | if (!(OP(scan) == ALNUM |
d6a28714 | 2262 | ? isALNUM(nextchr) : isALNUM_LC(nextchr))) |
bbce6d69 | 2263 | sayNO; |
b8c5462f | 2264 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 2265 | break; |
d6a28714 | 2266 | case NALNUML: |
b8c5462f JH |
2267 | PL_reg_flags |= RF_tainted; |
2268 | /* FALL THROUGH */ | |
d6a28714 JH |
2269 | case NALNUM: |
2270 | if (!nextchr && locinput >= PL_regeol) | |
a0ed51b3 | 2271 | sayNO; |
ffc61ed2 | 2272 | if (do_utf8) { |
8269fa76 | 2273 | LOAD_UTF8_CHARCLASS(alnum,"a"); |
ffc61ed2 | 2274 | if (OP(scan) == NALNUM |
3568d838 | 2275 | ? swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8) |
d6a28714 JH |
2276 | : isALNUM_LC_utf8((U8*)locinput)) |
2277 | { | |
b8c5462f | 2278 | sayNO; |
d6a28714 | 2279 | } |
b8c5462f JH |
2280 | locinput += PL_utf8skip[nextchr]; |
2281 | nextchr = UCHARAT(locinput); | |
2282 | break; | |
2283 | } | |
ffc61ed2 | 2284 | if (OP(scan) == NALNUM |
d6a28714 | 2285 | ? isALNUM(nextchr) : isALNUM_LC(nextchr)) |
b8c5462f | 2286 | sayNO; |
76e3520e | 2287 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 2288 | break; |
d6a28714 JH |
2289 | case BOUNDL: |
2290 | case NBOUNDL: | |
3280af22 | 2291 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 2292 | /* FALL THROUGH */ |
d6a28714 JH |
2293 | case BOUND: |
2294 | case NBOUND: | |
2295 | /* was last char in word? */ | |
ffc61ed2 | 2296 | if (do_utf8) { |
12d33761 HS |
2297 | if (locinput == PL_bostr) |
2298 | ln = '\n'; | |
ffc61ed2 JH |
2299 | else { |
2300 | U8 *r = reghop((U8*)locinput, -1); | |
9041c2e3 | 2301 | |
2b9d42f0 | 2302 | ln = utf8n_to_uvchr(r, s - (char*)r, 0, 0); |
ffc61ed2 JH |
2303 | } |
2304 | if (OP(scan) == BOUND || OP(scan) == NBOUND) { | |
2305 | ln = isALNUM_uni(ln); | |
8269fa76 | 2306 | LOAD_UTF8_CHARCLASS(alnum,"a"); |
3568d838 | 2307 | n = swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8); |
ffc61ed2 JH |
2308 | } |
2309 | else { | |
9041c2e3 | 2310 | ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln)); |
ffc61ed2 JH |
2311 | n = isALNUM_LC_utf8((U8*)locinput); |
2312 | } | |
a0ed51b3 | 2313 | } |
d6a28714 | 2314 | else { |
12d33761 HS |
2315 | ln = (locinput != PL_bostr) ? |
2316 | UCHARAT(locinput - 1) : '\n'; | |
ffc61ed2 JH |
2317 | if (OP(scan) == BOUND || OP(scan) == NBOUND) { |
2318 | ln = isALNUM(ln); | |
2319 | n = isALNUM(nextchr); | |
2320 | } | |
2321 | else { | |
2322 | ln = isALNUM_LC(ln); | |
2323 | n = isALNUM_LC(nextchr); | |
2324 | } | |
d6a28714 | 2325 | } |
ffc61ed2 JH |
2326 | if (((!ln) == (!n)) == (OP(scan) == BOUND || |
2327 | OP(scan) == BOUNDL)) | |
2328 | sayNO; | |
a0ed51b3 | 2329 | break; |
d6a28714 | 2330 | case SPACEL: |
3280af22 | 2331 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 2332 | /* FALL THROUGH */ |
d6a28714 | 2333 | case SPACE: |
9442cb0e | 2334 | if (!nextchr) |
4633a7c4 | 2335 | sayNO; |
1aa99e6b | 2336 | if (do_utf8) { |
fd400ab9 | 2337 | if (UTF8_IS_CONTINUED(nextchr)) { |
8269fa76 | 2338 | LOAD_UTF8_CHARCLASS(space," "); |
ffc61ed2 | 2339 | if (!(OP(scan) == SPACE |
3568d838 | 2340 | ? swash_fetch(PL_utf8_space, (U8*)locinput, do_utf8) |
ffc61ed2 JH |
2341 | : isSPACE_LC_utf8((U8*)locinput))) |
2342 | { | |
2343 | sayNO; | |
2344 | } | |
2345 | locinput += PL_utf8skip[nextchr]; | |
2346 | nextchr = UCHARAT(locinput); | |
2347 | break; | |
d6a28714 | 2348 | } |
ffc61ed2 JH |
2349 | if (!(OP(scan) == SPACE |
2350 | ? isSPACE(nextchr) : isSPACE_LC(nextchr))) | |
2351 | sayNO; | |
2352 | nextchr = UCHARAT(++locinput); | |
2353 | } | |
2354 | else { | |
2355 | if (!(OP(scan) == SPACE | |
2356 | ? isSPACE(nextchr) : isSPACE_LC(nextchr))) | |
2357 | sayNO; | |
2358 | nextchr = UCHARAT(++locinput); | |
a0ed51b3 | 2359 | } |
a0ed51b3 | 2360 | break; |
d6a28714 | 2361 | case NSPACEL: |
3280af22 | 2362 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 2363 | /* FALL THROUGH */ |
d6a28714 | 2364 | case NSPACE: |
9442cb0e | 2365 | if (!nextchr && locinput >= PL_regeol) |
b8c5462f | 2366 | sayNO; |
1aa99e6b | 2367 | if (do_utf8) { |
8269fa76 | 2368 | LOAD_UTF8_CHARCLASS(space," "); |
ffc61ed2 | 2369 | if (OP(scan) == NSPACE |
3568d838 | 2370 | ? swash_fetch(PL_utf8_space, (U8*)locinput, do_utf8) |
d6a28714 | 2371 | : isSPACE_LC_utf8((U8*)locinput)) |
b8c5462f JH |
2372 | { |
2373 | sayNO; | |
2374 | } | |
2375 | locinput += PL_utf8skip[nextchr]; | |
2376 | nextchr = UCHARAT(locinput); | |
2377 | break; | |
a0ed51b3 | 2378 | } |
ffc61ed2 | 2379 | if (OP(scan) == NSPACE |
d6a28714 | 2380 | ? isSPACE(nextchr) : isSPACE_LC(nextchr)) |
4633a7c4 | 2381 | sayNO; |
76e3520e | 2382 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 2383 | break; |
d6a28714 | 2384 | case DIGITL: |
a0ed51b3 LW |
2385 | PL_reg_flags |= RF_tainted; |
2386 | /* FALL THROUGH */ | |
d6a28714 | 2387 | case DIGIT: |
9442cb0e | 2388 | if (!nextchr) |
a0ed51b3 | 2389 | sayNO; |
1aa99e6b | 2390 | if (do_utf8) { |
8269fa76 | 2391 | LOAD_UTF8_CHARCLASS(digit,"0"); |
ffc61ed2 | 2392 | if (!(OP(scan) == DIGIT |
3568d838 | 2393 | ? swash_fetch(PL_utf8_digit, (U8*)locinput, do_utf8) |
9442cb0e | 2394 | : isDIGIT_LC_utf8((U8*)locinput))) |
dfe13c55 | 2395 | { |
a0ed51b3 | 2396 | sayNO; |
dfe13c55 | 2397 | } |
6f06b55f | 2398 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
2399 | nextchr = UCHARAT(locinput); |
2400 | break; | |
2401 | } | |
ffc61ed2 | 2402 | if (!(OP(scan) == DIGIT |
9442cb0e | 2403 | ? isDIGIT(nextchr) : isDIGIT_LC(nextchr))) |
a0ed51b3 LW |
2404 | sayNO; |
2405 | nextchr = UCHARAT(++locinput); | |
2406 | break; | |
d6a28714 | 2407 | case NDIGITL: |
b8c5462f JH |
2408 | PL_reg_flags |= RF_tainted; |
2409 | /* FALL THROUGH */ | |
d6a28714 | 2410 | case NDIGIT: |
9442cb0e | 2411 | if (!nextchr && locinput >= PL_regeol) |
b8c5462f | 2412 | sayNO; |
1aa99e6b | 2413 | if (do_utf8) { |
8269fa76 | 2414 | LOAD_UTF8_CHARCLASS(digit,"0"); |
ffc61ed2 | 2415 | if (OP(scan) == NDIGIT |
3568d838 | 2416 | ? swash_fetch(PL_utf8_digit, (U8*)locinput, do_utf8) |
9442cb0e GS |
2417 | : isDIGIT_LC_utf8((U8*)locinput)) |
2418 | { | |
a0ed51b3 | 2419 | sayNO; |
9442cb0e | 2420 | } |
6f06b55f | 2421 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
2422 | nextchr = UCHARAT(locinput); |
2423 | break; | |
2424 | } | |
ffc61ed2 | 2425 | if (OP(scan) == NDIGIT |
9442cb0e | 2426 | ? isDIGIT(nextchr) : isDIGIT_LC(nextchr)) |
a0ed51b3 LW |
2427 | sayNO; |
2428 | nextchr = UCHARAT(++locinput); | |
2429 | break; | |
2430 | case CLUMP: | |
8269fa76 | 2431 | LOAD_UTF8_CHARCLASS(mark,"~"); |
3568d838 JH |
2432 | if (locinput >= PL_regeol || |
2433 | swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8)) | |
a0ed51b3 | 2434 | sayNO; |
6f06b55f | 2435 | locinput += PL_utf8skip[nextchr]; |
3568d838 JH |
2436 | while (locinput < PL_regeol && |
2437 | swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8)) | |
a0ed51b3 LW |
2438 | locinput += UTF8SKIP(locinput); |
2439 | if (locinput > PL_regeol) | |
2440 | sayNO; | |
2441 | nextchr = UCHARAT(locinput); | |
2442 | break; | |
c8756f30 | 2443 | case REFFL: |
3280af22 | 2444 | PL_reg_flags |= RF_tainted; |
c8756f30 | 2445 | /* FALL THROUGH */ |
c277df42 | 2446 | case REF: |
c8756f30 | 2447 | case REFF: |
c277df42 | 2448 | n = ARG(scan); /* which paren pair */ |
cf93c79d | 2449 | ln = PL_regstartp[n]; |
2c2d71f5 | 2450 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
cf93c79d | 2451 | if (*PL_reglastparen < n || ln == -1) |
af3f8c16 | 2452 | sayNO; /* Do not match unless seen CLOSEn. */ |
cf93c79d | 2453 | if (ln == PL_regendp[n]) |
a0d0e21e | 2454 | break; |
a0ed51b3 | 2455 | |
cf93c79d | 2456 | s = PL_bostr + ln; |
1aa99e6b | 2457 | if (do_utf8 && OP(scan) != REF) { /* REF can do byte comparison */ |
a0ed51b3 | 2458 | char *l = locinput; |
cf93c79d | 2459 | char *e = PL_bostr + PL_regendp[n]; |
a0ed51b3 LW |
2460 | /* |
2461 | * Note that we can't do the "other character" lookup trick as | |
2462 | * in the 8-bit case (no pun intended) because in Unicode we | |
2463 | * have to map both upper and title case to lower case. | |
2464 | */ | |
2465 | if (OP(scan) == REFF) { | |
2466 | while (s < e) { | |
2467 | if (l >= PL_regeol) | |
2468 | sayNO; | |
dfe13c55 | 2469 | if (toLOWER_utf8((U8*)s) != toLOWER_utf8((U8*)l)) |
a0ed51b3 LW |
2470 | sayNO; |
2471 | s += UTF8SKIP(s); | |
2472 | l += UTF8SKIP(l); | |
2473 | } | |
2474 | } | |
2475 | else { | |
2476 | while (s < e) { | |
2477 | if (l >= PL_regeol) | |
2478 | sayNO; | |
dfe13c55 | 2479 | if (toLOWER_LC_utf8((U8*)s) != toLOWER_LC_utf8((U8*)l)) |
a0ed51b3 LW |
2480 | sayNO; |
2481 | s += UTF8SKIP(s); | |
2482 | l += UTF8SKIP(l); | |
2483 | } | |
2484 | } | |
2485 | locinput = l; | |
2486 | nextchr = UCHARAT(locinput); | |
2487 | break; | |
2488 | } | |
2489 | ||
a0d0e21e | 2490 | /* Inline the first character, for speed. */ |
76e3520e | 2491 | if (UCHARAT(s) != nextchr && |
c8756f30 AK |
2492 | (OP(scan) == REF || |
2493 | (UCHARAT(s) != ((OP(scan) == REFF | |
22c35a8c | 2494 | ? PL_fold : PL_fold_locale)[nextchr])))) |
4633a7c4 | 2495 | sayNO; |
cf93c79d | 2496 | ln = PL_regendp[n] - ln; |
3280af22 | 2497 | if (locinput + ln > PL_regeol) |
4633a7c4 | 2498 | sayNO; |
c8756f30 AK |
2499 | if (ln > 1 && (OP(scan) == REF |
2500 | ? memNE(s, locinput, ln) | |
2501 | : (OP(scan) == REFF | |
2502 | ? ibcmp(s, locinput, ln) | |
2503 | : ibcmp_locale(s, locinput, ln)))) | |
4633a7c4 | 2504 | sayNO; |
a0d0e21e | 2505 | locinput += ln; |
76e3520e | 2506 | nextchr = UCHARAT(locinput); |
a0d0e21e LW |
2507 | break; |
2508 | ||
2509 | case NOTHING: | |
c277df42 | 2510 | case TAIL: |
a0d0e21e LW |
2511 | break; |
2512 | case BACK: | |
2513 | break; | |
c277df42 IZ |
2514 | case EVAL: |
2515 | { | |
2516 | dSP; | |
533c011a | 2517 | OP_4tree *oop = PL_op; |
3280af22 NIS |
2518 | COP *ocurcop = PL_curcop; |
2519 | SV **ocurpad = PL_curpad; | |
c277df42 | 2520 | SV *ret; |
9041c2e3 | 2521 | |
c277df42 | 2522 | n = ARG(scan); |
533c011a | 2523 | PL_op = (OP_4tree*)PL_regdata->data[n]; |
d7d93a81 | 2524 | DEBUG_r( PerlIO_printf(Perl_debug_log, " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) ); |
dfad63ad | 2525 | PL_curpad = AvARRAY((AV*)PL_regdata->data[n + 2]); |
cf93c79d | 2526 | PL_regendp[0] = PL_reg_magic->mg_len = locinput - PL_bostr; |
c277df42 | 2527 | |
cea2e8a9 | 2528 | CALLRUNOPS(aTHX); /* Scalar context. */ |
c277df42 IZ |
2529 | SPAGAIN; |
2530 | ret = POPs; | |
2531 | PUTBACK; | |
9041c2e3 | 2532 | |
0f5d15d6 IZ |
2533 | PL_op = oop; |
2534 | PL_curpad = ocurpad; | |
2535 | PL_curcop = ocurcop; | |
c277df42 | 2536 | if (logical) { |
0f5d15d6 IZ |
2537 | if (logical == 2) { /* Postponed subexpression. */ |
2538 | regexp *re; | |
22c35a8c | 2539 | MAGIC *mg = Null(MAGIC*); |
0f5d15d6 | 2540 | re_cc_state state; |
0f5d15d6 IZ |
2541 | CHECKPOINT cp, lastcp; |
2542 | ||
2543 | if(SvROK(ret) || SvRMAGICAL(ret)) { | |
2544 | SV *sv = SvROK(ret) ? SvRV(ret) : ret; | |
2545 | ||
2546 | if(SvMAGICAL(sv)) | |
14befaf4 | 2547 | mg = mg_find(sv, PERL_MAGIC_qr); |
0f5d15d6 IZ |
2548 | } |
2549 | if (mg) { | |
2550 | re = (regexp *)mg->mg_obj; | |
df0003d4 | 2551 | (void)ReREFCNT_inc(re); |
0f5d15d6 IZ |
2552 | } |
2553 | else { | |
2554 | STRLEN len; | |
2555 | char *t = SvPV(ret, len); | |
2556 | PMOP pm; | |
2557 | char *oprecomp = PL_regprecomp; | |
2558 | I32 osize = PL_regsize; | |
2559 | I32 onpar = PL_regnpar; | |
2560 | ||
5fcd1c1b | 2561 | Zero(&pm, 1, PMOP); |
cea2e8a9 | 2562 | re = CALLREGCOMP(aTHX_ t, t + len, &pm); |
9041c2e3 | 2563 | if (!(SvFLAGS(ret) |
0f5d15d6 | 2564 | & (SVs_TEMP | SVs_PADTMP | SVf_READONLY))) |
14befaf4 DM |
2565 | sv_magic(ret,(SV*)ReREFCNT_inc(re), |
2566 | PERL_MAGIC_qr,0,0); | |
0f5d15d6 IZ |
2567 | PL_regprecomp = oprecomp; |
2568 | PL_regsize = osize; | |
2569 | PL_regnpar = onpar; | |
2570 | } | |
2571 | DEBUG_r( | |
9041c2e3 | 2572 | PerlIO_printf(Perl_debug_log, |
0f5d15d6 IZ |
2573 | "Entering embedded `%s%.60s%s%s'\n", |
2574 | PL_colors[0], | |
2575 | re->precomp, | |
2576 | PL_colors[1], | |
2577 | (strlen(re->precomp) > 60 ? "..." : "")) | |
2578 | ); | |
2579 | state.node = next; | |
2580 | state.prev = PL_reg_call_cc; | |
2581 | state.cc = PL_regcc; | |
2582 | state.re = PL_reg_re; | |
2583 | ||
2ab05381 | 2584 | PL_regcc = 0; |
9041c2e3 | 2585 | |
0f5d15d6 | 2586 | cp = regcppush(0); /* Save *all* the positions. */ |
02db2b7b | 2587 | REGCP_SET(lastcp); |
0f5d15d6 IZ |
2588 | cache_re(re); |
2589 | state.ss = PL_savestack_ix; | |
2590 | *PL_reglastparen = 0; | |
a01268b5 | 2591 | *PL_reglastcloseparen = 0; |
0f5d15d6 IZ |
2592 | PL_reg_call_cc = &state; |
2593 | PL_reginput = locinput; | |
2c2d71f5 JH |
2594 | |
2595 | /* XXXX This is too dramatic a measure... */ | |
2596 | PL_reg_maxiter = 0; | |
2597 | ||
0f5d15d6 | 2598 | if (regmatch(re->program + 1)) { |
2c914db6 IZ |
2599 | /* Even though we succeeded, we need to restore |
2600 | global variables, since we may be wrapped inside | |
2601 | SUSPEND, thus the match may be not finished yet. */ | |
2602 | ||
2603 | /* XXXX Do this only if SUSPENDed? */ | |
2604 | PL_reg_call_cc = state.prev; | |
2605 | PL_regcc = state.cc; | |
2606 | PL_reg_re = state.re; | |
2607 | cache_re(PL_reg_re); | |
2608 | ||
2609 | /* XXXX This is too dramatic a measure... */ | |
2610 | PL_reg_maxiter = 0; | |
2611 | ||
2612 | /* These are needed even if not SUSPEND. */ | |
0f5d15d6 IZ |
2613 | ReREFCNT_dec(re); |
2614 | regcpblow(cp); | |
2615 | sayYES; | |
2616 | } | |
0f5d15d6 | 2617 | ReREFCNT_dec(re); |
02db2b7b | 2618 | REGCP_UNWIND(lastcp); |
0f5d15d6 IZ |
2619 | regcppop(); |
2620 | PL_reg_call_cc = state.prev; | |
2621 | PL_regcc = state.cc; | |
2622 | PL_reg_re = state.re; | |
d3790889 | 2623 | cache_re(PL_reg_re); |
2c2d71f5 JH |
2624 | |
2625 | /* XXXX This is too dramatic a measure... */ | |
2626 | PL_reg_maxiter = 0; | |
2627 | ||
8e514ae6 | 2628 | logical = 0; |
0f5d15d6 IZ |
2629 | sayNO; |
2630 | } | |
c277df42 | 2631 | sw = SvTRUE(ret); |
0f5d15d6 | 2632 | logical = 0; |
a0ed51b3 LW |
2633 | } |
2634 | else | |
3280af22 | 2635 | sv_setsv(save_scalar(PL_replgv), ret); |
c277df42 IZ |
2636 | break; |
2637 | } | |
a0d0e21e | 2638 | case OPEN: |
c277df42 | 2639 | n = ARG(scan); /* which paren pair */ |
3280af22 NIS |
2640 | PL_reg_start_tmp[n] = locinput; |
2641 | if (n > PL_regsize) | |
2642 | PL_regsize = n; | |
a0d0e21e LW |
2643 | break; |
2644 | case CLOSE: | |
c277df42 | 2645 | n = ARG(scan); /* which paren pair */ |
cf93c79d IZ |
2646 | PL_regstartp[n] = PL_reg_start_tmp[n] - PL_bostr; |
2647 | PL_regendp[n] = locinput - PL_bostr; | |
3280af22 NIS |
2648 | if (n > *PL_reglastparen) |
2649 | *PL_reglastparen = n; | |
a01268b5 | 2650 | *PL_reglastcloseparen = n; |
a0d0e21e | 2651 | break; |
c277df42 IZ |
2652 | case GROUPP: |
2653 | n = ARG(scan); /* which paren pair */ | |
cf93c79d | 2654 | sw = (*PL_reglastparen >= n && PL_regendp[n] != -1); |
c277df42 IZ |
2655 | break; |
2656 | case IFTHEN: | |
2c2d71f5 | 2657 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
c277df42 IZ |
2658 | if (sw) |
2659 | next = NEXTOPER(NEXTOPER(scan)); | |
2660 | else { | |
2661 | next = scan + ARG(scan); | |
2662 | if (OP(next) == IFTHEN) /* Fake one. */ | |
2663 | next = NEXTOPER(NEXTOPER(next)); | |
2664 | } | |
2665 | break; | |
2666 | case LOGICAL: | |
0f5d15d6 | 2667 | logical = scan->flags; |
c277df42 | 2668 | break; |
2ab05381 IZ |
2669 | /******************************************************************* |
2670 | PL_regcc contains infoblock about the innermost (...)* loop, and | |
2671 | a pointer to the next outer infoblock. | |
2672 | ||
2673 | Here is how Y(A)*Z is processed (if it is compiled into CURLYX/WHILEM): | |
2674 | ||
2675 | 1) After matching X, regnode for CURLYX is processed; | |
2676 | ||
9041c2e3 | 2677 | 2) This regnode creates infoblock on the stack, and calls |
2ab05381 IZ |
2678 | regmatch() recursively with the starting point at WHILEM node; |
2679 | ||
2680 | 3) Each hit of WHILEM node tries to match A and Z (in the order | |
2681 | depending on the current iteration, min/max of {min,max} and | |
2682 | greediness). The information about where are nodes for "A" | |
2683 | and "Z" is read from the infoblock, as is info on how many times "A" | |
2684 | was already matched, and greediness. | |
2685 | ||
2686 | 4) After A matches, the same WHILEM node is hit again. | |
2687 | ||
2688 | 5) Each time WHILEM is hit, PL_regcc is the infoblock created by CURLYX | |
2689 | of the same pair. Thus when WHILEM tries to match Z, it temporarily | |
2690 | resets PL_regcc, since this Y(A)*Z can be a part of some other loop: | |
2691 | as in (Y(A)*Z)*. If Z matches, the automaton will hit the WHILEM node | |
2692 | of the external loop. | |
2693 | ||
2694 | Currently present infoblocks form a tree with a stem formed by PL_curcc | |
2695 | and whatever it mentions via ->next, and additional attached trees | |
2696 | corresponding to temporarily unset infoblocks as in "5" above. | |
2697 | ||
9041c2e3 | 2698 | In the following picture infoblocks for outer loop of |
2ab05381 IZ |
2699 | (Y(A)*?Z)*?T are denoted O, for inner I. NULL starting block |
2700 | is denoted by x. The matched string is YAAZYAZT. Temporarily postponed | |
2701 | infoblocks are drawn below the "reset" infoblock. | |
2702 | ||
2703 | In fact in the picture below we do not show failed matches for Z and T | |
2704 | by WHILEM blocks. [We illustrate minimal matches, since for them it is | |
2705 | more obvious *why* one needs to *temporary* unset infoblocks.] | |
2706 | ||
2707 | Matched REx position InfoBlocks Comment | |
2708 | (Y(A)*?Z)*?T x | |
2709 | Y(A)*?Z)*?T x <- O | |
2710 | Y (A)*?Z)*?T x <- O | |
2711 | Y A)*?Z)*?T x <- O <- I | |
2712 | YA )*?Z)*?T x <- O <- I | |
2713 | YA A)*?Z)*?T x <- O <- I | |
2714 | YAA )*?Z)*?T x <- O <- I | |
2715 | YAA Z)*?T x <- O # Temporary unset I | |
2716 | I | |
2717 | ||
2718 | YAAZ Y(A)*?Z)*?T x <- O | |
2719 | I | |
2720 | ||
2721 | YAAZY (A)*?Z)*?T x <- O | |
2722 | I | |
2723 | ||
2724 | YAAZY A)*?Z)*?T x <- O <- I | |
2725 | I | |
2726 | ||
2727 | YAAZYA )*?Z)*?T x <- O <- I | |
2728 | I | |
2729 | ||
2730 | YAAZYA Z)*?T x <- O # Temporary unset I | |
2731 | I,I | |
2732 | ||
2733 | YAAZYAZ )*?T x <- O | |
2734 | I,I | |
2735 | ||
2736 | YAAZYAZ T x # Temporary unset O | |
2737 | O | |
2738 | I,I | |
2739 | ||
2740 | YAAZYAZT x | |
2741 | O | |
2742 | I,I | |
2743 | *******************************************************************/ | |
a0d0e21e LW |
2744 | case CURLYX: { |
2745 | CURCUR cc; | |
3280af22 | 2746 | CHECKPOINT cp = PL_savestack_ix; |
cb434fcc IZ |
2747 | /* No need to save/restore up to this paren */ |
2748 | I32 parenfloor = scan->flags; | |
c277df42 IZ |
2749 | |
2750 | if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */ | |
2751 | next += ARG(next); | |
3280af22 NIS |
2752 | cc.oldcc = PL_regcc; |
2753 | PL_regcc = &cc; | |
cb434fcc IZ |
2754 | /* XXXX Probably it is better to teach regpush to support |
2755 | parenfloor > PL_regsize... */ | |
2756 | if (parenfloor > *PL_reglastparen) | |
2757 | parenfloor = *PL_reglastparen; /* Pessimization... */ | |
2758 | cc.parenfloor = parenfloor; | |
a0d0e21e LW |
2759 | cc.cur = -1; |
2760 | cc.min = ARG1(scan); | |
2761 | cc.max = ARG2(scan); | |
c277df42 | 2762 | cc.scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS; |
a0d0e21e LW |
2763 | cc.next = next; |
2764 | cc.minmod = minmod; | |
2765 | cc.lastloc = 0; | |
3280af22 | 2766 | PL_reginput = locinput; |
a0d0e21e LW |
2767 | n = regmatch(PREVOPER(next)); /* start on the WHILEM */ |
2768 | regcpblow(cp); | |
3280af22 | 2769 | PL_regcc = cc.oldcc; |
4633a7c4 | 2770 | saySAME(n); |
a0d0e21e LW |
2771 | } |
2772 | /* NOT REACHED */ | |
2773 | case WHILEM: { | |
2774 | /* | |
2775 | * This is really hard to understand, because after we match | |
2776 | * what we're trying to match, we must make sure the rest of | |
2c2d71f5 | 2777 | * the REx is going to match for sure, and to do that we have |
a0d0e21e LW |
2778 | * to go back UP the parse tree by recursing ever deeper. And |
2779 | * if it fails, we have to reset our parent's current state | |
2780 | * that we can try again after backing off. | |
2781 | */ | |
2782 | ||
c277df42 | 2783 | CHECKPOINT cp, lastcp; |
3280af22 | 2784 | CURCUR* cc = PL_regcc; |
c277df42 IZ |
2785 | char *lastloc = cc->lastloc; /* Detection of 0-len. */ |
2786 | ||
4633a7c4 | 2787 | n = cc->cur + 1; /* how many we know we matched */ |
3280af22 | 2788 | PL_reginput = locinput; |
a0d0e21e | 2789 | |
c277df42 | 2790 | DEBUG_r( |
9041c2e3 NIS |
2791 | PerlIO_printf(Perl_debug_log, |
2792 | "%*s %ld out of %ld..%ld cc=%lx\n", | |
3280af22 | 2793 | REPORT_CODE_OFF+PL_regindent*2, "", |
9041c2e3 | 2794 | (long)n, (long)cc->min, |
c277df42 IZ |
2795 | (long)cc->max, (long)cc) |
2796 | ); | |
4633a7c4 | 2797 | |
a0d0e21e LW |
2798 | /* If degenerate scan matches "", assume scan done. */ |
2799 | ||
579cf2c3 | 2800 | if (locinput == cc->lastloc && n >= cc->min) { |
3280af22 | 2801 | PL_regcc = cc->oldcc; |
2ab05381 IZ |
2802 | if (PL_regcc) |
2803 | ln = PL_regcc->cur; | |
c277df42 | 2804 | DEBUG_r( |
c3464db5 DD |
2805 | PerlIO_printf(Perl_debug_log, |
2806 | "%*s empty match detected, try continuation...\n", | |
3280af22 | 2807 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 | 2808 | ); |
a0d0e21e | 2809 | if (regmatch(cc->next)) |
4633a7c4 | 2810 | sayYES; |
2ab05381 IZ |
2811 | if (PL_regcc) |
2812 | PL_regcc->cur = ln; | |
3280af22 | 2813 | PL_regcc = cc; |
4633a7c4 | 2814 | sayNO; |
a0d0e21e LW |
2815 | } |
2816 | ||
2817 | /* First just match a string of min scans. */ | |
2818 | ||
2819 | if (n < cc->min) { | |
2820 | cc->cur = n; | |
2821 | cc->lastloc = locinput; | |
4633a7c4 LW |
2822 | if (regmatch(cc->scan)) |
2823 | sayYES; | |
2824 | cc->cur = n - 1; | |
c277df42 | 2825 | cc->lastloc = lastloc; |
4633a7c4 | 2826 | sayNO; |
a0d0e21e LW |
2827 | } |
2828 | ||
2c2d71f5 JH |
2829 | if (scan->flags) { |
2830 | /* Check whether we already were at this position. | |
2831 | Postpone detection until we know the match is not | |
2832 | *that* much linear. */ | |
2833 | if (!PL_reg_maxiter) { | |
2834 | PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4); | |
2835 | PL_reg_leftiter = PL_reg_maxiter; | |
2836 | } | |
2837 | if (PL_reg_leftiter-- == 0) { | |
2838 | I32 size = (PL_reg_maxiter + 7)/8; | |
2839 | if (PL_reg_poscache) { | |
2840 | if (PL_reg_poscache_size < size) { | |
2841 | Renew(PL_reg_poscache, size, char); | |
2842 | PL_reg_poscache_size = size; | |
2843 | } | |
2844 | Zero(PL_reg_poscache, size, char); | |
2845 | } | |
2846 | else { | |
2847 | PL_reg_poscache_size = size; | |
2848 | Newz(29, PL_reg_poscache, size, char); | |
2849 | } | |
2850 | DEBUG_r( | |
2851 | PerlIO_printf(Perl_debug_log, | |
2852 | "%sDetected a super-linear match, switching on caching%s...\n", | |
2853 | PL_colors[4], PL_colors[5]) | |
2854 | ); | |
2855 | } | |
2856 | if (PL_reg_leftiter < 0) { | |
2857 | I32 o = locinput - PL_bostr, b; | |
2858 | ||
2859 | o = (scan->flags & 0xf) - 1 + o * (scan->flags>>4); | |
2860 | b = o % 8; | |
2861 | o /= 8; | |
2862 | if (PL_reg_poscache[o] & (1<<b)) { | |
2863 | DEBUG_r( | |
2864 | PerlIO_printf(Perl_debug_log, | |
2865 | "%*s already tried at this position...\n", | |
2866 | REPORT_CODE_OFF+PL_regindent*2, "") | |
2867 | ); | |
7821416a | 2868 | sayNO_SILENT; |
2c2d71f5 JH |
2869 | } |
2870 | PL_reg_poscache[o] |= (1<<b); | |
2871 | } | |
2872 | } | |
2873 | ||
a0d0e21e LW |
2874 | /* Prefer next over scan for minimal matching. */ |
2875 | ||
2876 | if (cc->minmod) { | |
3280af22 | 2877 | PL_regcc = cc->oldcc; |
2ab05381 IZ |
2878 | if (PL_regcc) |
2879 | ln = PL_regcc->cur; | |
5f05dabc | 2880 | cp = regcppush(cc->parenfloor); |
02db2b7b | 2881 | REGCP_SET(lastcp); |
5f05dabc | 2882 | if (regmatch(cc->next)) { |
c277df42 | 2883 | regcpblow(cp); |
4633a7c4 | 2884 | sayYES; /* All done. */ |
5f05dabc | 2885 | } |
02db2b7b | 2886 | REGCP_UNWIND(lastcp); |
5f05dabc | 2887 | regcppop(); |
2ab05381 IZ |
2888 | if (PL_regcc) |
2889 | PL_regcc->cur = ln; | |
3280af22 | 2890 | PL_regcc = cc; |
a0d0e21e | 2891 | |
c277df42 | 2892 | if (n >= cc->max) { /* Maximum greed exceeded? */ |
9041c2e3 | 2893 | if (ckWARN(WARN_REGEXP) && n >= REG_INFTY |
3280af22 NIS |
2894 | && !(PL_reg_flags & RF_warned)) { |
2895 | PL_reg_flags |= RF_warned; | |
e476b1b5 | 2896 | Perl_warner(aTHX_ WARN_REGEXP, "%s limit (%d) exceeded", |
2f3ca594 GS |
2897 | "Complex regular subexpression recursion", |
2898 | REG_INFTY - 1); | |
c277df42 | 2899 | } |
4633a7c4 | 2900 | sayNO; |
c277df42 | 2901 | } |
a687059c | 2902 | |
c277df42 | 2903 | DEBUG_r( |
c3464db5 DD |
2904 | PerlIO_printf(Perl_debug_log, |
2905 | "%*s trying longer...\n", | |
3280af22 | 2906 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 | 2907 | ); |
a0d0e21e | 2908 | /* Try scanning more and see if it helps. */ |
3280af22 | 2909 | PL_reginput = locinput; |
a0d0e21e LW |
2910 | cc->cur = n; |
2911 | cc->lastloc = locinput; | |
5f05dabc | 2912 | cp = regcppush(cc->parenfloor); |
02db2b7b | 2913 | REGCP_SET(lastcp); |
5f05dabc | 2914 | if (regmatch(cc->scan)) { |
c277df42 | 2915 | regcpblow(cp); |
4633a7c4 | 2916 | sayYES; |
5f05dabc | 2917 | } |
02db2b7b | 2918 | REGCP_UNWIND(lastcp); |
5f05dabc | 2919 | regcppop(); |
4633a7c4 | 2920 | cc->cur = n - 1; |
c277df42 | 2921 | cc->lastloc = lastloc; |
4633a7c4 | 2922 | sayNO; |
a0d0e21e LW |
2923 | } |
2924 | ||
2925 | /* Prefer scan over next for maximal matching. */ | |
2926 | ||
2927 | if (n < cc->max) { /* More greed allowed? */ | |
5f05dabc | 2928 | cp = regcppush(cc->parenfloor); |
a0d0e21e LW |
2929 | cc->cur = n; |
2930 | cc->lastloc = locinput; | |
02db2b7b | 2931 | REGCP_SET(lastcp); |
5f05dabc | 2932 | if (regmatch(cc->scan)) { |
c277df42 | 2933 | regcpblow(cp); |
4633a7c4 | 2934 | sayYES; |
5f05dabc | 2935 | } |
02db2b7b | 2936 | REGCP_UNWIND(lastcp); |
a0d0e21e | 2937 | regcppop(); /* Restore some previous $<digit>s? */ |
3280af22 | 2938 | PL_reginput = locinput; |
c277df42 | 2939 | DEBUG_r( |
c3464db5 DD |
2940 | PerlIO_printf(Perl_debug_log, |
2941 | "%*s failed, try continuation...\n", | |
3280af22 | 2942 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 IZ |
2943 | ); |
2944 | } | |
9041c2e3 | 2945 | if (ckWARN(WARN_REGEXP) && n >= REG_INFTY |
599cee73 | 2946 | && !(PL_reg_flags & RF_warned)) { |
3280af22 | 2947 | PL_reg_flags |= RF_warned; |
e476b1b5 | 2948 | Perl_warner(aTHX_ WARN_REGEXP, "%s limit (%d) exceeded", |
cb5d145d GS |
2949 | "Complex regular subexpression recursion", |
2950 | REG_INFTY - 1); | |
a0d0e21e LW |
2951 | } |
2952 | ||
2953 | /* Failed deeper matches of scan, so see if this one works. */ | |
3280af22 | 2954 | PL_regcc = cc->oldcc; |
2ab05381 IZ |
2955 | if (PL_regcc) |
2956 | ln = PL_regcc->cur; | |
a0d0e21e | 2957 | if (regmatch(cc->next)) |
4633a7c4 | 2958 | sayYES; |
2ab05381 IZ |
2959 | if (PL_regcc) |
2960 | PL_regcc->cur = ln; | |
3280af22 | 2961 | PL_regcc = cc; |
4633a7c4 | 2962 | cc->cur = n - 1; |
c277df42 | 2963 | cc->lastloc = lastloc; |
4633a7c4 | 2964 | sayNO; |
a0d0e21e LW |
2965 | } |
2966 | /* NOT REACHED */ | |
9041c2e3 | 2967 | case BRANCHJ: |
c277df42 IZ |
2968 | next = scan + ARG(scan); |
2969 | if (next == scan) | |
2970 | next = NULL; | |
2971 | inner = NEXTOPER(NEXTOPER(scan)); | |
2972 | goto do_branch; | |
9041c2e3 | 2973 | case BRANCH: |
c277df42 IZ |
2974 | inner = NEXTOPER(scan); |
2975 | do_branch: | |
2976 | { | |
c277df42 IZ |
2977 | c1 = OP(scan); |
2978 | if (OP(next) != c1) /* No choice. */ | |
2979 | next = inner; /* Avoid recursion. */ | |
a0d0e21e | 2980 | else { |
02db2b7b IZ |
2981 | I32 lastparen = *PL_reglastparen; |
2982 | I32 unwind1; | |
2983 | re_unwind_branch_t *uw; | |
2984 | ||
2985 | /* Put unwinding data on stack */ | |
2986 | unwind1 = SSNEWt(1,re_unwind_branch_t); | |
2987 | uw = SSPTRt(unwind1,re_unwind_branch_t); | |
2988 | uw->prev = unwind; | |
2989 | unwind = unwind1; | |
2990 | uw->type = ((c1 == BRANCH) | |
2991 | ? RE_UNWIND_BRANCH | |
2992 | : RE_UNWIND_BRANCHJ); | |
2993 | uw->lastparen = lastparen; | |
2994 | uw->next = next; | |
2995 | uw->locinput = locinput; | |
2996 | uw->nextchr = nextchr; | |
2997 | #ifdef DEBUGGING | |
2998 | uw->regindent = ++PL_regindent; | |
2999 | #endif | |
c277df42 | 3000 | |
02db2b7b IZ |
3001 | REGCP_SET(uw->lastcp); |
3002 | ||
3003 | /* Now go into the first branch */ | |
3004 | next = inner; | |
a687059c | 3005 | } |
a0d0e21e LW |
3006 | } |
3007 | break; | |
3008 | case MINMOD: | |
3009 | minmod = 1; | |
3010 | break; | |
c277df42 IZ |
3011 | case CURLYM: |
3012 | { | |
00db4c45 | 3013 | I32 l = 0; |
c277df42 | 3014 | CHECKPOINT lastcp; |
9041c2e3 | 3015 | |
c277df42 IZ |
3016 | /* We suppose that the next guy does not need |
3017 | backtracking: in particular, it is of constant length, | |
3018 | and has no parenths to influence future backrefs. */ | |
3019 | ln = ARG1(scan); /* min to match */ | |
3020 | n = ARG2(scan); /* max to match */ | |
c277df42 IZ |
3021 | paren = scan->flags; |
3022 | if (paren) { | |
3280af22 NIS |
3023 | if (paren > PL_regsize) |
3024 | PL_regsize = paren; | |
3025 | if (paren > *PL_reglastparen) | |
3026 | *PL_reglastparen = paren; | |
c277df42 | 3027 | } |
dc45a647 | 3028 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
c277df42 IZ |
3029 | if (paren) |
3030 | scan += NEXT_OFF(scan); /* Skip former OPEN. */ | |
3280af22 | 3031 | PL_reginput = locinput; |
c277df42 IZ |
3032 | if (minmod) { |
3033 | minmod = 0; | |
3034 | if (ln && regrepeat_hard(scan, ln, &l) < ln) | |
3035 | sayNO; | |
f31a99c8 HS |
3036 | /* if we matched something zero-length we don't need to |
3037 | backtrack - capturing parens are already defined, so | |
3038 | the caveat in the maximal case doesn't apply | |
3039 | ||
3040 | XXXX if ln == 0, we can redo this check first time | |
3041 | through the following loop | |
3042 | */ | |
3043 | if (ln && l == 0) | |
3044 | n = ln; /* don't backtrack */ | |
3280af22 | 3045 | locinput = PL_reginput; |
5f80c4cf JP |
3046 | if ( |
3047 | PL_regkind[(U8)OP(next)] == EXACT || | |
74750237 JP |
3048 | OP(next) == OPEN || |
3049 | OP(next) == CLOSE || | |
5f80c4cf JP |
3050 | OP(next) == EVAL |
3051 | ) { | |
3052 | regnode *text_node = next; | |
3053 | ||
3054 | if (PL_regkind[(U8)OP(next)] != EXACT) | |
74750237 | 3055 | NEXT_IMPT(text_node); |
5f80c4cf JP |
3056 | |
3057 | if (PL_regkind[(U8)OP(text_node)] != EXACT) { | |
3058 | c1 = c2 = -1000; | |
3059 | } | |
3060 | else { | |
3061 | c1 = (U8)*STRING(text_node); | |
3062 | if (OP(next) == EXACTF) | |
3063 | c2 = PL_fold[c1]; | |
3064 | else if (OP(text_node) == EXACTFL) | |
3065 | c2 = PL_fold_locale[c1]; | |
3066 | else | |
3067 | c2 = c1; | |
3068 | } | |
a0ed51b3 LW |
3069 | } |
3070 | else | |
c277df42 | 3071 | c1 = c2 = -1000; |
02db2b7b | 3072 | REGCP_SET(lastcp); |
5f4b28b2 | 3073 | /* This may be improved if l == 0. */ |
c277df42 IZ |
3074 | while (n >= ln || (n == REG_INFTY && ln > 0 && l)) { /* ln overflow ? */ |
3075 | /* If it could work, try it. */ | |
3076 | if (c1 == -1000 || | |
3280af22 NIS |
3077 | UCHARAT(PL_reginput) == c1 || |
3078 | UCHARAT(PL_reginput) == c2) | |
c277df42 IZ |
3079 | { |
3080 | if (paren) { | |
f31a99c8 | 3081 | if (ln) { |
cf93c79d IZ |
3082 | PL_regstartp[paren] = |
3083 | HOPc(PL_reginput, -l) - PL_bostr; | |
3084 | PL_regendp[paren] = PL_reginput - PL_bostr; | |
a0ed51b3 LW |
3085 | } |
3086 | else | |
cf93c79d | 3087 | PL_regendp[paren] = -1; |
c277df42 IZ |
3088 | } |
3089 | if (regmatch(next)) | |
3090 | sayYES; | |
02db2b7b | 3091 | REGCP_UNWIND(lastcp); |
c277df42 IZ |
3092 | } |
3093 | /* Couldn't or didn't -- move forward. */ | |
3280af22 | 3094 | PL_reginput = locinput; |
c277df42 IZ |
3095 | if (regrepeat_hard(scan, 1, &l)) { |
3096 | ln++; | |
3280af22 | 3097 | locinput = PL_reginput; |
c277df42 IZ |
3098 | } |
3099 | else | |
3100 | sayNO; | |
3101 | } | |
a0ed51b3 LW |
3102 | } |
3103 | else { | |
c277df42 | 3104 | n = regrepeat_hard(scan, n, &l); |
f31a99c8 HS |
3105 | /* if we matched something zero-length we don't need to |
3106 | backtrack, unless the minimum count is zero and we | |
3107 | are capturing the result - in that case the capture | |
3108 | being defined or not may affect later execution | |
3109 | */ | |
3110 | if (n != 0 && l == 0 && !(paren && ln == 0)) | |
3111 | ln = n; /* don't backtrack */ | |
3280af22 | 3112 | locinput = PL_reginput; |
c277df42 | 3113 | DEBUG_r( |
5c0ca799 | 3114 | PerlIO_printf(Perl_debug_log, |
faccc32b | 3115 | "%*s matched %"IVdf" times, len=%"IVdf"...\n", |
7b0972df | 3116 | (int)(REPORT_CODE_OFF+PL_regindent*2), "", |
faccc32b | 3117 | (IV) n, (IV)l) |
c277df42 IZ |
3118 | ); |
3119 | if (n >= ln) { | |
5f80c4cf JP |
3120 | if ( |
3121 | PL_regkind[(U8)OP(next)] == EXACT || | |
74750237 JP |
3122 | OP(next) == OPEN || |
3123 | OP(next) == CLOSE || | |
5f80c4cf JP |
3124 | OP(next) == EVAL |
3125 | ) { | |
3126 | regnode *text_node = next; | |
3127 | ||
3128 | if (PL_regkind[(U8)OP(next)] != EXACT) | |
74750237 | 3129 | NEXT_IMPT(text_node); |
5f80c4cf JP |
3130 | |
3131 | if (PL_regkind[(U8)OP(text_node)] != EXACT) { | |
3132 | c1 = c2 = -1000; | |
3133 | } | |
3134 | else { | |
3135 | c1 = (U8)*STRING(text_node); | |
3136 | if (OP(text_node) == EXACTF) | |
3137 | c2 = PL_fold[c1]; | |
3138 | else if (OP(text_node) == EXACTFL) | |
3139 | c2 = PL_fold_locale[c1]; | |
3140 | else | |
3141 | c2 = c1; | |
3142 | } | |
a0ed51b3 LW |
3143 | } |
3144 | else | |
c277df42 IZ |
3145 | c1 = c2 = -1000; |
3146 | } | |
02db2b7b | 3147 | REGCP_SET(lastcp); |
c277df42 IZ |
3148 | while (n >= ln) { |
3149 | /* If it could work, try it. */ | |
3150 | if (c1 == -1000 || | |
3280af22 NIS |
3151 | UCHARAT(PL_reginput) == c1 || |
3152 | UCHARAT(PL_reginput) == c2) | |
a0ed51b3 LW |
3153 | { |
3154 | DEBUG_r( | |
c3464db5 | 3155 | PerlIO_printf(Perl_debug_log, |
7b0972df JH |
3156 | "%*s trying tail with n=%"IVdf"...\n", |
3157 | (int)(REPORT_CODE_OFF+PL_regindent*2), "", (IV)n) | |
a0ed51b3 LW |
3158 | ); |
3159 | if (paren) { | |
3160 | if (n) { | |
cf93c79d IZ |
3161 | PL_regstartp[paren] = HOPc(PL_reginput, -l) - PL_bostr; |
3162 | PL_regendp[paren] = PL_reginput - PL_bostr; | |
c277df42 | 3163 | } |
a0ed51b3 | 3164 | else |
cf93c79d | 3165 | PL_regendp[paren] = -1; |
c277df42 | 3166 | } |
a0ed51b3 LW |
3167 | if (regmatch(next)) |
3168 | sayYES; | |
02db2b7b | 3169 | REGCP_UNWIND(lastcp); |
a0ed51b3 | 3170 | } |
c277df42 IZ |
3171 | /* Couldn't or didn't -- back up. */ |
3172 | n--; | |
dfe13c55 | 3173 | locinput = HOPc(locinput, -l); |
3280af22 | 3174 | PL_reginput = locinput; |
c277df42 IZ |
3175 | } |
3176 | } | |
3177 | sayNO; | |
3178 | break; | |
3179 | } | |
3180 | case CURLYN: | |
3181 | paren = scan->flags; /* Which paren to set */ | |
3280af22 NIS |
3182 | if (paren > PL_regsize) |
3183 | PL_regsize = paren; | |
3184 | if (paren > *PL_reglastparen) | |
3185 | *PL_reglastparen = paren; | |
c277df42 IZ |
3186 | ln = ARG1(scan); /* min to match */ |
3187 | n = ARG2(scan); /* max to match */ | |
dc45a647 | 3188 | scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE); |
c277df42 | 3189 | goto repeat; |
a0d0e21e | 3190 | case CURLY: |
c277df42 | 3191 | paren = 0; |
a0d0e21e LW |
3192 | ln = ARG1(scan); /* min to match */ |
3193 | n = ARG2(scan); /* max to match */ | |
dc45a647 | 3194 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
a0d0e21e LW |
3195 | goto repeat; |
3196 | case STAR: | |
3197 | ln = 0; | |
c277df42 | 3198 | n = REG_INFTY; |
a0d0e21e | 3199 | scan = NEXTOPER(scan); |
c277df42 | 3200 | paren = 0; |
a0d0e21e LW |
3201 | goto repeat; |
3202 | case PLUS: | |
c277df42 IZ |
3203 | ln = 1; |
3204 | n = REG_INFTY; | |
3205 | scan = NEXTOPER(scan); | |
3206 | paren = 0; | |
3207 | repeat: | |
a0d0e21e LW |
3208 | /* |
3209 | * Lookahead to avoid useless match attempts | |
3210 | * when we know what character comes next. | |
3211 | */ | |
5f80c4cf JP |
3212 | |
3213 | /* | |
3214 | * Used to only do .*x and .*?x, but now it allows | |
3215 | * for )'s, ('s and (?{ ... })'s to be in the way | |
3216 | * of the quantifier and the EXACT-like node. -- japhy | |
3217 | */ | |
3218 | ||
3219 | if ( | |
3220 | PL_regkind[(U8)OP(next)] == EXACT || | |
74750237 JP |
3221 | OP(next) == OPEN || |
3222 | OP(next) == CLOSE || | |
5f80c4cf JP |
3223 | OP(next) == EVAL |
3224 | ) { | |
3225 | U8 *s; | |
3226 | regnode *text_node = next; | |
3227 | ||
3228 | if (PL_regkind[(U8)OP(next)] != EXACT) | |
74750237 | 3229 | NEXT_IMPT(text_node); |
5f80c4cf JP |
3230 | |
3231 | if (PL_regkind[(U8)OP(text_node)] != EXACT) { | |
3232 | c1 = c2 = -1000; | |
3233 | } | |
3234 | else { | |
3235 | s = (U8*)STRING(text_node); | |
3236 | ||
3237 | if (!UTF) { | |
3238 | c2 = c1 = *s; | |
3239 | if (OP(text_node) == EXACTF) | |
3240 | c2 = PL_fold[c1]; | |
3241 | else if (OP(text_node) == EXACTFL) | |
3242 | c2 = PL_fold_locale[c1]; | |
1aa99e6b | 3243 | } |
5f80c4cf JP |
3244 | else { /* UTF */ |
3245 | if (OP(text_node) == EXACTF) { | |
3246 | c1 = to_utf8_lower(s); | |
3247 | c2 = to_utf8_upper(s); | |
3248 | } | |
3249 | else { | |
3250 | c2 = c1 = utf8_to_uvchr(s, NULL); | |
3251 | } | |
1aa99e6b IH |
3252 | } |
3253 | } | |
bbce6d69 | 3254 | } |
a0d0e21e | 3255 | else |
bbce6d69 | 3256 | c1 = c2 = -1000; |
3280af22 | 3257 | PL_reginput = locinput; |
a0d0e21e | 3258 | if (minmod) { |
c277df42 | 3259 | CHECKPOINT lastcp; |
a0d0e21e LW |
3260 | minmod = 0; |
3261 | if (ln && regrepeat(scan, ln) < ln) | |
4633a7c4 | 3262 | sayNO; |
a0ed51b3 | 3263 | locinput = PL_reginput; |
02db2b7b | 3264 | REGCP_SET(lastcp); |
0fe9bf95 | 3265 | if (c1 != -1000) { |
1aa99e6b | 3266 | char *e; /* Should not check after this */ |
0fe9bf95 IZ |
3267 | char *old = locinput; |
3268 | ||
1aa99e6b | 3269 | if (n == REG_INFTY) { |
0fe9bf95 | 3270 | e = PL_regeol - 1; |
1aa99e6b IH |
3271 | if (do_utf8) |
3272 | while (UTF8_IS_CONTINUATION(*(U8*)e)) | |
3273 | e--; | |
3274 | } | |
3275 | else if (do_utf8) { | |
3276 | int m = n - ln; | |
3277 | for (e = locinput; | |
3278 | m >0 && e + UTF8SKIP(e) <= PL_regeol; m--) | |
3279 | e += UTF8SKIP(e); | |
3280 | } | |
3281 | else { | |
3282 | e = locinput + n - ln; | |
3283 | if (e >= PL_regeol) | |
3284 | e = PL_regeol - 1; | |
3285 | } | |
0fe9bf95 | 3286 | while (1) { |
1aa99e6b | 3287 | int count; |
0fe9bf95 | 3288 | /* Find place 'next' could work */ |
1aa99e6b IH |
3289 | if (!do_utf8) { |
3290 | if (c1 == c2) { | |
3291 | while (locinput <= e && *locinput != c1) | |
3292 | locinput++; | |
3293 | } else { | |
9041c2e3 | 3294 | while (locinput <= e |
1aa99e6b IH |
3295 | && *locinput != c1 |
3296 | && *locinput != c2) | |
3297 | locinput++; | |
3298 | } | |
3299 | count = locinput - old; | |
3300 | } | |
3301 | else { | |
3302 | STRLEN len; | |
3303 | if (c1 == c2) { | |
3304 | for (count = 0; | |
3305 | locinput <= e && | |
9041c2e3 | 3306 | utf8_to_uvchr((U8*)locinput, &len) != c1; |
1aa99e6b IH |
3307 | count++) |
3308 | locinput += len; | |
3309 | ||
3310 | } else { | |
3311 | for (count = 0; locinput <= e; count++) { | |
9041c2e3 | 3312 | UV c = utf8_to_uvchr((U8*)locinput, &len); |
1aa99e6b IH |
3313 | if (c == c1 || c == c2) |
3314 | break; | |
9041c2e3 | 3315 | locinput += len; |
1aa99e6b IH |
3316 | } |
3317 | } | |
0fe9bf95 | 3318 | } |
9041c2e3 | 3319 | if (locinput > e) |
0fe9bf95 IZ |
3320 | sayNO; |
3321 | /* PL_reginput == old now */ | |
3322 | if (locinput != old) { | |
3323 | ln = 1; /* Did some */ | |
1aa99e6b | 3324 | if (regrepeat(scan, count) < count) |
0fe9bf95 IZ |
3325 | sayNO; |
3326 | } | |
3327 | /* PL_reginput == locinput now */ | |
29d1e993 | 3328 | TRYPAREN(paren, ln, locinput); |
0fe9bf95 | 3329 | PL_reginput = locinput; /* Could be reset... */ |
02db2b7b | 3330 | REGCP_UNWIND(lastcp); |
0fe9bf95 | 3331 | /* Couldn't or didn't -- move forward. */ |
1aa99e6b IH |
3332 | old = locinput; |
3333 | if (do_utf8) | |
3334 | locinput += UTF8SKIP(locinput); | |
3335 | else | |
3336 | locinput++; | |
0fe9bf95 IZ |
3337 | } |
3338 | } | |
3339 | else | |
c277df42 | 3340 | while (n >= ln || (n == REG_INFTY && ln > 0)) { /* ln overflow ? */ |
1aa99e6b IH |
3341 | UV c; |
3342 | if (c1 != -1000) { | |
3343 | if (do_utf8) | |
9041c2e3 | 3344 | c = utf8_to_uvchr((U8*)PL_reginput, NULL); |
1aa99e6b | 3345 | else |
9041c2e3 | 3346 | c = UCHARAT(PL_reginput); |
2390ecbc PP |
3347 | /* If it could work, try it. */ |
3348 | if (c == c1 || c == c2) | |
3349 | { | |
3350 | TRYPAREN(paren, n, PL_reginput); | |
3351 | REGCP_UNWIND(lastcp); | |
3352 | } | |
1aa99e6b | 3353 | } |
a0d0e21e | 3354 | /* If it could work, try it. */ |
2390ecbc | 3355 | else if (c1 == -1000) |
bbce6d69 | 3356 | { |
29d1e993 | 3357 | TRYPAREN(paren, n, PL_reginput); |
02db2b7b | 3358 | REGCP_UNWIND(lastcp); |
bbce6d69 | 3359 | } |
c277df42 | 3360 | /* Couldn't or didn't -- move forward. */ |
a0ed51b3 | 3361 | PL_reginput = locinput; |
a0d0e21e LW |
3362 | if (regrepeat(scan, 1)) { |
3363 | ln++; | |
a0ed51b3 LW |
3364 | locinput = PL_reginput; |
3365 | } | |
3366 | else | |
4633a7c4 | 3367 | sayNO; |
a0d0e21e LW |
3368 | } |
3369 | } | |
3370 | else { | |
c277df42 | 3371 | CHECKPOINT lastcp; |
a0d0e21e | 3372 | n = regrepeat(scan, n); |
a0ed51b3 | 3373 | locinput = PL_reginput; |
22c35a8c | 3374 | if (ln < n && PL_regkind[(U8)OP(next)] == EOL && |
1aeab75a | 3375 | (!PL_multiline || OP(next) == SEOL || OP(next) == EOS)) { |
a0d0e21e | 3376 | ln = n; /* why back off? */ |
1aeab75a GS |
3377 | /* ...because $ and \Z can match before *and* after |
3378 | newline at the end. Consider "\n\n" =~ /\n+\Z\n/. | |
3379 | We should back off by one in this case. */ | |
3380 | if (UCHARAT(PL_reginput - 1) == '\n' && OP(next) != EOS) | |
3381 | ln--; | |
3382 | } | |
02db2b7b | 3383 | REGCP_SET(lastcp); |
c277df42 | 3384 | if (paren) { |
8fa7f367 | 3385 | UV c = 0; |
c277df42 | 3386 | while (n >= ln) { |
1aa99e6b IH |
3387 | if (c1 != -1000) { |
3388 | if (do_utf8) | |
9041c2e3 | 3389 | c = utf8_to_uvchr((U8*)PL_reginput, NULL); |
1aa99e6b | 3390 | else |
9041c2e3 | 3391 | c = UCHARAT(PL_reginput); |
1aa99e6b | 3392 | } |
c277df42 | 3393 | /* If it could work, try it. */ |
1aa99e6b | 3394 | if (c1 == -1000 || c == c1 || c == c2) |
c277df42 | 3395 | { |
29d1e993 | 3396 | TRYPAREN(paren, n, PL_reginput); |
02db2b7b | 3397 | REGCP_UNWIND(lastcp); |
c277df42 IZ |
3398 | } |
3399 | /* Couldn't or didn't -- back up. */ | |
3400 | n--; | |
dfe13c55 | 3401 | PL_reginput = locinput = HOPc(locinput, -1); |
c277df42 | 3402 | } |
a0ed51b3 LW |
3403 | } |
3404 | else { | |
8fa7f367 | 3405 | UV c = 0; |
c277df42 | 3406 | while (n >= ln) { |
1aa99e6b IH |
3407 | if (c1 != -1000) { |
3408 | if (do_utf8) | |
9041c2e3 | 3409 | c = utf8_to_uvchr((U8*)PL_reginput, NULL); |
1aa99e6b | 3410 | else |
9041c2e3 | 3411 | c = UCHARAT(PL_reginput); |
1aa99e6b | 3412 | } |
c277df42 | 3413 | /* If it could work, try it. */ |
1aa99e6b | 3414 | if (c1 == -1000 || c == c1 || c == c2) |
c277df42 | 3415 | { |
29d1e993 | 3416 | TRYPAREN(paren, n, PL_reginput); |
02db2b7b | 3417 | REGCP_UNWIND(lastcp); |
c277df42 IZ |
3418 | } |
3419 | /* Couldn't or didn't -- back up. */ | |
3420 | n--; | |
dfe13c55 | 3421 | PL_reginput = locinput = HOPc(locinput, -1); |
bbce6d69 | 3422 | } |
a0d0e21e LW |
3423 | } |
3424 | } | |
4633a7c4 | 3425 | sayNO; |
c277df42 | 3426 | break; |
a0d0e21e | 3427 | case END: |
0f5d15d6 IZ |
3428 | if (PL_reg_call_cc) { |
3429 | re_cc_state *cur_call_cc = PL_reg_call_cc; | |
3430 | CURCUR *cctmp = PL_regcc; | |
3431 | regexp *re = PL_reg_re; | |
3432 | CHECKPOINT cp, lastcp; | |
3433 | ||
3434 | cp = regcppush(0); /* Save *all* the positions. */ | |
02db2b7b | 3435 | REGCP_SET(lastcp); |
0f5d15d6 IZ |
3436 | regcp_set_to(PL_reg_call_cc->ss); /* Restore parens of |
3437 | the caller. */ | |
3438 | PL_reginput = locinput; /* Make position available to | |
3439 | the callcc. */ | |
3440 | cache_re(PL_reg_call_cc->re); | |
3441 | PL_regcc = PL_reg_call_cc->cc; | |
3442 | PL_reg_call_cc = PL_reg_call_cc->prev; | |
3443 | if (regmatch(cur_call_cc->node)) { | |
3444 | PL_reg_call_cc = cur_call_cc; | |
3445 | regcpblow(cp); | |
3446 | sayYES; | |
3447 | } | |
02db2b7b | 3448 | REGCP_UNWIND(lastcp); |
0f5d15d6 IZ |
3449 | regcppop(); |
3450 | PL_reg_call_cc = cur_call_cc; | |
3451 | PL_regcc = cctmp; | |
3452 | PL_reg_re = re; | |
3453 | cache_re(re); | |
3454 | ||
3455 | DEBUG_r( | |
3456 | PerlIO_printf(Perl_debug_log, | |
3457 | "%*s continuation failed...\n", | |
3458 | REPORT_CODE_OFF+PL_regindent*2, "") | |
3459 | ); | |
7821416a | 3460 | sayNO_SILENT; |
0f5d15d6 | 3461 | } |
7821416a IZ |
3462 | if (locinput < PL_regtill) { |
3463 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
3464 | "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n", | |
3465 | PL_colors[4], | |
3466 | (long)(locinput - PL_reg_starttry), | |
3467 | (long)(PL_regtill - PL_reg_starttry), | |
3468 | PL_colors[5])); | |
3469 | sayNO_FINAL; /* Cannot match: too short. */ | |
3470 | } | |
3471 | PL_reginput = locinput; /* put where regtry can find it */ | |
3472 | sayYES_FINAL; /* Success! */ | |
7e5428c5 | 3473 | case SUCCEED: |
3280af22 | 3474 | PL_reginput = locinput; /* put where regtry can find it */ |
7821416a | 3475 | sayYES_LOUD; /* Success! */ |
c277df42 IZ |
3476 | case SUSPEND: |
3477 | n = 1; | |
9fe1d20c | 3478 | PL_reginput = locinput; |
9041c2e3 | 3479 | goto do_ifmatch; |
a0d0e21e | 3480 | case UNLESSM: |
c277df42 | 3481 | n = 0; |
a0ed51b3 | 3482 | if (scan->flags) { |
efb30f32 HS |
3483 | s = HOPBACKc(locinput, scan->flags); |
3484 | if (!s) | |
3485 | goto say_yes; | |
3486 | PL_reginput = s; | |
a0ed51b3 LW |
3487 | } |
3488 | else | |
3489 | PL_reginput = locinput; | |
c277df42 IZ |
3490 | goto do_ifmatch; |
3491 | case IFMATCH: | |
3492 | n = 1; | |
a0ed51b3 | 3493 | if (scan->flags) { |
efb30f32 HS |
3494 | s = HOPBACKc(locinput, scan->flags); |
3495 | if (!s) | |
3496 | goto say_no; | |
3497 | PL_reginput = s; | |
a0ed51b3 LW |
3498 | } |
3499 | else | |
3500 | PL_reginput = locinput; | |
3501 | ||
c277df42 | 3502 | do_ifmatch: |
c277df42 IZ |
3503 | inner = NEXTOPER(NEXTOPER(scan)); |
3504 | if (regmatch(inner) != n) { | |
3505 | say_no: | |
3506 | if (logical) { | |
3507 | logical = 0; | |
3508 | sw = 0; | |
3509 | goto do_longjump; | |
a0ed51b3 LW |
3510 | } |
3511 | else | |
c277df42 IZ |
3512 | sayNO; |
3513 | } | |
3514 | say_yes: | |
3515 | if (logical) { | |
3516 | logical = 0; | |
3517 | sw = 1; | |
3518 | } | |
fe44a5e8 | 3519 | if (OP(scan) == SUSPEND) { |
3280af22 | 3520 | locinput = PL_reginput; |
565764a8 | 3521 | nextchr = UCHARAT(locinput); |
fe44a5e8 | 3522 | } |
c277df42 IZ |
3523 | /* FALL THROUGH. */ |
3524 | case LONGJMP: | |
3525 | do_longjump: | |
3526 | next = scan + ARG(scan); | |
3527 | if (next == scan) | |
3528 | next = NULL; | |
a0d0e21e LW |
3529 | break; |
3530 | default: | |
b900a521 | 3531 | PerlIO_printf(Perl_error_log, "%"UVxf" %d\n", |
d7d93a81 | 3532 | PTR2UV(scan), OP(scan)); |
cea2e8a9 | 3533 | Perl_croak(aTHX_ "regexp memory corruption"); |
a687059c | 3534 | } |
02db2b7b | 3535 | reenter: |
a0d0e21e LW |
3536 | scan = next; |
3537 | } | |
a687059c | 3538 | |
a0d0e21e LW |
3539 | /* |
3540 | * We get here only if there's trouble -- normally "case END" is | |
3541 | * the terminating point. | |
3542 | */ | |
cea2e8a9 | 3543 | Perl_croak(aTHX_ "corrupted regexp pointers"); |
a0d0e21e | 3544 | /*NOTREACHED*/ |
4633a7c4 LW |
3545 | sayNO; |
3546 | ||
7821416a IZ |
3547 | yes_loud: |
3548 | DEBUG_r( | |
3549 | PerlIO_printf(Perl_debug_log, | |
3550 | "%*s %scould match...%s\n", | |
3551 | REPORT_CODE_OFF+PL_regindent*2, "", PL_colors[4],PL_colors[5]) | |
3552 | ); | |
3553 | goto yes; | |
3554 | yes_final: | |
3555 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n", | |
3556 | PL_colors[4],PL_colors[5])); | |
4633a7c4 LW |
3557 | yes: |
3558 | #ifdef DEBUGGING | |
3280af22 | 3559 | PL_regindent--; |
4633a7c4 | 3560 | #endif |
02db2b7b IZ |
3561 | |
3562 | #if 0 /* Breaks $^R */ | |
3563 | if (unwind) | |
3564 | regcpblow(firstcp); | |
3565 | #endif | |
4633a7c4 LW |
3566 | return 1; |
3567 | ||
3568 | no: | |
7821416a IZ |
3569 | DEBUG_r( |
3570 | PerlIO_printf(Perl_debug_log, | |
3571 | "%*s %sfailed...%s\n", | |
3572 | REPORT_CODE_OFF+PL_regindent*2, "",PL_colors[4],PL_colors[5]) | |
3573 | ); | |
3574 | goto do_no; | |
3575 | no_final: | |
3576 | do_no: | |
02db2b7b IZ |
3577 | if (unwind) { |
3578 | re_unwind_t *uw = SSPTRt(unwind,re_unwind_t); | |
3579 | ||
3580 | switch (uw->type) { | |
3581 | case RE_UNWIND_BRANCH: | |
3582 | case RE_UNWIND_BRANCHJ: | |
3583 | { | |
3584 | re_unwind_branch_t *uwb = &(uw->branch); | |
3585 | I32 lastparen = uwb->lastparen; | |
9041c2e3 | 3586 | |
02db2b7b IZ |
3587 | REGCP_UNWIND(uwb->lastcp); |
3588 | for (n = *PL_reglastparen; n > lastparen; n--) | |
3589 | PL_regendp[n] = -1; | |
3590 | *PL_reglastparen = n; | |
3591 | scan = next = uwb->next; | |
9041c2e3 NIS |
3592 | if ( !scan || |
3593 | OP(scan) != (uwb->type == RE_UNWIND_BRANCH | |
02db2b7b IZ |
3594 | ? BRANCH : BRANCHJ) ) { /* Failure */ |
3595 | unwind = uwb->prev; | |
3596 | #ifdef DEBUGGING | |
3597 | PL_regindent--; | |
3598 | #endif | |
3599 | goto do_no; | |
3600 | } | |
3601 | /* Have more choice yet. Reuse the same uwb. */ | |
3602 | /*SUPPRESS 560*/ | |
3603 | if ((n = (uwb->type == RE_UNWIND_BRANCH | |
3604 | ? NEXT_OFF(next) : ARG(next)))) | |
3605 | next += n; | |
3606 | else | |
3607 | next = NULL; /* XXXX Needn't unwinding in this case... */ | |
3608 | uwb->next = next; | |
3609 | next = NEXTOPER(scan); | |
3610 | if (uwb->type == RE_UNWIND_BRANCHJ) | |
3611 | next = NEXTOPER(next); | |
3612 | locinput = uwb->locinput; | |
3613 | nextchr = uwb->nextchr; | |
3614 | #ifdef DEBUGGING | |
3615 | PL_regindent = uwb->regindent; | |
3616 | #endif | |
3617 | ||
3618 | goto reenter; | |
3619 | } | |
3620 | /* NOT REACHED */ | |
3621 | default: | |
3622 | Perl_croak(aTHX_ "regexp unwind memory corruption"); | |
3623 | } | |
3624 | /* NOT REACHED */ | |
3625 | } | |
4633a7c4 | 3626 | #ifdef DEBUGGING |
3280af22 | 3627 | PL_regindent--; |
4633a7c4 | 3628 | #endif |
a0d0e21e | 3629 | return 0; |
a687059c LW |
3630 | } |
3631 | ||
3632 | /* | |
3633 | - regrepeat - repeatedly match something simple, report how many | |
3634 | */ | |
3635 | /* | |
3636 | * [This routine now assumes that it will only match on things of length 1. | |
3637 | * That was true before, but now we assume scan - reginput is the count, | |
a0ed51b3 | 3638 | * rather than incrementing count on every character. [Er, except utf8.]] |
a687059c | 3639 | */ |
76e3520e | 3640 | STATIC I32 |
cea2e8a9 | 3641 | S_regrepeat(pTHX_ regnode *p, I32 max) |
a687059c | 3642 | { |
a0d0e21e | 3643 | register char *scan; |
a0d0e21e | 3644 | register I32 c; |
3280af22 | 3645 | register char *loceol = PL_regeol; |
a0ed51b3 | 3646 | register I32 hardcount = 0; |
53c4c00c | 3647 | register bool do_utf8 = PL_reg_match_utf8; |
a0d0e21e | 3648 | |
3280af22 | 3649 | scan = PL_reginput; |
c277df42 | 3650 | if (max != REG_INFTY && max < loceol - scan) |
a0d0e21e | 3651 | loceol = scan + max; |
a0d0e21e | 3652 | switch (OP(p)) { |
22c35a8c | 3653 | case REG_ANY: |
1aa99e6b | 3654 | if (do_utf8) { |
ffc61ed2 | 3655 | loceol = PL_regeol; |
1aa99e6b | 3656 | while (scan < loceol && hardcount < max && *scan != '\n') { |
ffc61ed2 JH |
3657 | scan += UTF8SKIP(scan); |
3658 | hardcount++; | |
3659 | } | |
3660 | } else { | |
3661 | while (scan < loceol && *scan != '\n') | |
3662 | scan++; | |
a0ed51b3 LW |
3663 | } |
3664 | break; | |
ffc61ed2 | 3665 | case SANY: |
3baa4c62 | 3666 | scan = loceol; |
a0ed51b3 | 3667 | break; |
f33976b4 DB |
3668 | case CANY: |
3669 | scan = loceol; | |
3670 | break; | |
bbce6d69 | 3671 | case EXACT: /* length of string is 1 */ |
cd439c50 | 3672 | c = (U8)*STRING(p); |
bbce6d69 | 3673 | while (scan < loceol && UCHARAT(scan) == c) |
3674 | scan++; | |
3675 | break; | |
3676 | case EXACTF: /* length of string is 1 */ | |
cd439c50 | 3677 | c = (U8)*STRING(p); |
bbce6d69 | 3678 | while (scan < loceol && |
22c35a8c | 3679 | (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c])) |
bbce6d69 | 3680 | scan++; |
3681 | break; | |
3682 | case EXACTFL: /* length of string is 1 */ | |
3280af22 | 3683 | PL_reg_flags |= RF_tainted; |
cd439c50 | 3684 | c = (U8)*STRING(p); |
bbce6d69 | 3685 | while (scan < loceol && |
22c35a8c | 3686 | (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c])) |
a0d0e21e LW |
3687 | scan++; |
3688 | break; | |
3689 | case ANYOF: | |
ffc61ed2 JH |
3690 | if (do_utf8) { |
3691 | loceol = PL_regeol; | |
1aa99e6b IH |
3692 | while (hardcount < max && scan < loceol && |
3693 | reginclass(p, (U8*)scan, do_utf8)) { | |
ffc61ed2 JH |
3694 | scan += UTF8SKIP(scan); |
3695 | hardcount++; | |
3696 | } | |
3697 | } else { | |
3698 | while (scan < loceol && reginclass(p, (U8*)scan, do_utf8)) | |
3699 | scan++; | |
3700 | } | |
a0d0e21e LW |
3701 | break; |
3702 | case ALNUM: | |
1aa99e6b | 3703 | if (do_utf8) { |
ffc61ed2 | 3704 | loceol = PL_regeol; |
8269fa76 | 3705 | LOAD_UTF8_CHARCLASS(alnum,"a"); |
1aa99e6b | 3706 | while (hardcount < max && scan < loceol && |
3568d838 | 3707 | swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) { |
ffc61ed2 JH |
3708 | scan += UTF8SKIP(scan); |
3709 | hardcount++; | |
3710 | } | |
3711 | } else { | |
3712 | while (scan < loceol && isALNUM(*scan)) | |
3713 | scan++; | |
a0ed51b3 LW |
3714 | } |
3715 | break; | |
bbce6d69 | 3716 | case ALNUML: |
3280af22 | 3717 | PL_reg_flags |= RF_tainted; |
1aa99e6b | 3718 | if (do_utf8) { |
ffc61ed2 | 3719 | loceol = PL_regeol; |
1aa99e6b IH |
3720 | while (hardcount < max && scan < loceol && |
3721 | isALNUM_LC_utf8((U8*)scan)) { | |
ffc61ed2 JH |
3722 | scan += UTF8SKIP(scan); |
3723 | hardcount++; | |
3724 | } | |
3725 | } else { | |
3726 | while (scan < loceol && isALNUM_LC(*scan)) | |
3727 | scan++; | |
a0ed51b3 LW |
3728 | } |
3729 | break; | |
a0d0e21e | 3730 | case NALNUM: |
1aa99e6b | 3731 | if (do_utf8) { |
ffc61ed2 | 3732 | loceol = PL_regeol; |
8269fa76 | 3733 | LOAD_UTF8_CHARCLASS(alnum,"a"); |
1aa99e6b | 3734 | while (hardcount < max && scan < loceol && |
3568d838 | 3735 | !swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) { |
ffc61ed2 JH |
3736 | scan += UTF8SKIP(scan); |
3737 | hardcount++; | |
3738 | } | |
3739 | } else { | |
3740 | while (scan < loceol && !isALNUM(*scan)) | |
3741 | scan++; | |
a0ed51b3 LW |
3742 | } |
3743 | break; | |
bbce6d69 | 3744 | case NALNUML: |
3280af22 | 3745 | PL_reg_flags |= RF_tainted; |
1aa99e6b | 3746 | if (do_utf8) { |
ffc61ed2 | 3747 | loceol = PL_regeol; |
1aa99e6b IH |
3748 | while (hardcount < max && scan < loceol && |
3749 | !isALNUM_LC_utf8((U8*)scan)) { | |
ffc61ed2 JH |
3750 | scan += UTF8SKIP(scan); |
3751 | hardcount++; | |
3752 | } | |
3753 | } else { | |
3754 | while (scan < loceol && !isALNUM_LC(*scan)) | |
3755 | scan++; | |
a0ed51b3 LW |
3756 | } |
3757 | break; | |
a0d0e21e | 3758 | case SPACE: |
1aa99e6b | 3759 | if (do_utf8) { |
ffc61ed2 | 3760 | loceol = PL_regeol; |
8269fa76 | 3761 | LOAD_UTF8_CHARCLASS(space," "); |
1aa99e6b | 3762 | while (hardcount < max && scan < loceol && |
3568d838 JH |
3763 | (*scan == ' ' || |
3764 | swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) { | |
ffc61ed2 JH |
3765 | scan += UTF8SKIP(scan); |
3766 | hardcount++; | |
3767 | } | |
3768 | } else { | |
3769 | while (scan < loceol && isSPACE(*scan)) | |
3770 | scan++; | |
a0ed51b3 LW |
3771 | } |
3772 | break; | |
bbce6d69 | 3773 | case SPACEL: |
3280af22 | 3774 | PL_reg_flags |= RF_tainted; |
1aa99e6b | 3775 | if (do_utf8) { |
ffc61ed2 | 3776 | loceol = PL_regeol; |
1aa99e6b | 3777 | while (hardcount < max && scan < loceol && |
ffc61ed2 JH |
3778 | (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
3779 | scan += UTF8SKIP(scan); | |
3780 | hardcount++; | |
3781 | } | |
3782 | } else { | |
3783 | while (scan < loceol && isSPACE_LC(*scan)) | |
3784 | scan++; | |
a0ed51b3 LW |
3785 | } |
3786 | break; | |
a0d0e21e | 3787 | case NSPACE: |
1aa99e6b | 3788 | if (do_utf8) { |
ffc61ed2 | 3789 | loceol = PL_regeol; |
8269fa76 | 3790 | LOAD_UTF8_CHARCLASS(space," "); |
1aa99e6b | 3791 | while (hardcount < max && scan < loceol && |
3568d838 JH |
3792 | !(*scan == ' ' || |
3793 | swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) { | |
ffc61ed2 JH |
3794 | scan += UTF8SKIP(scan); |
3795 | hardcount++; | |
3796 | } | |
3797 | } else { | |
3798 | while (scan < loceol && !isSPACE(*scan)) | |
3799 | scan++; | |
3800 | break; | |
a0ed51b3 | 3801 | } |
bbce6d69 | 3802 | case NSPACEL: |
3280af22 | 3803 | PL_reg_flags |= RF_tainted; |
1aa99e6b | 3804 | if (do_utf8) { |
ffc61ed2 | 3805 | loceol = PL_regeol; |
1aa99e6b | 3806 | while (hardcount < max && scan < loceol && |
ffc61ed2 JH |
3807 | !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
3808 | scan += UTF8SKIP(scan); | |
3809 | hardcount++; | |
3810 | } | |
3811 | } else { | |
3812 | while (scan < loceol && !isSPACE_LC(*scan)) | |
3813 | scan++; | |
a0ed51b3 LW |
3814 | } |
3815 | break; | |
a0d0e21e | 3816 | case DIGIT: |
1aa99e6b | 3817 | if (do_utf8) { |
ffc61ed2 | 3818 | loceol = PL_regeol; |
8269fa76 | 3819 | LOAD_UTF8_CHARCLASS(digit,"0"); |
1aa99e6b | 3820 | while (hardcount < max && scan < loceol && |
3568d838 | 3821 | swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) { |
ffc61ed2 JH |
3822 | scan += UTF8SKIP(scan); |
3823 | hardcount++; | |
3824 | } | |
3825 | } else { | |
3826 | while (scan < loceol && isDIGIT(*scan)) | |
3827 | scan++; | |
a0ed51b3 LW |
3828 | } |
3829 | break; | |
a0d0e21e | 3830 | case NDIGIT: |
1aa99e6b | 3831 | if (do_utf8) { |
ffc61ed2 | 3832 | loceol = PL_regeol; |
8269fa76 | 3833 | LOAD_UTF8_CHARCLASS(digit,"0"); |
1aa99e6b | 3834 | while (hardcount < max && scan < loceol && |
3568d838 | 3835 | !swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) { |
ffc61ed2 JH |
3836 | scan += UTF8SKIP(scan); |
3837 | hardcount++; | |
3838 | } | |
3839 | } else { | |
3840 | while (scan < loceol && !isDIGIT(*scan)) | |
3841 | scan++; | |
a0ed51b3 LW |
3842 | } |
3843 | break; | |
a0d0e21e LW |
3844 | default: /* Called on something of 0 width. */ |
3845 | break; /* So match right here or not at all. */ | |
3846 | } | |
a687059c | 3847 | |
a0ed51b3 LW |
3848 | if (hardcount) |
3849 | c = hardcount; | |
3850 | else | |
3851 | c = scan - PL_reginput; | |
3280af22 | 3852 | PL_reginput = scan; |
a687059c | 3853 | |
9041c2e3 | 3854 | DEBUG_r( |
c277df42 IZ |
3855 | { |
3856 | SV *prop = sv_newmortal(); | |
3857 | ||
3858 | regprop(prop, p); | |
9041c2e3 NIS |
3859 | PerlIO_printf(Perl_debug_log, |
3860 | "%*s %s can match %"IVdf" times out of %"IVdf"...\n", | |
7b0972df | 3861 | REPORT_CODE_OFF+1, "", SvPVX(prop),(IV)c,(IV)max); |
c277df42 | 3862 | }); |
9041c2e3 | 3863 | |
a0d0e21e | 3864 | return(c); |
a687059c LW |
3865 | } |
3866 | ||
3867 | /* | |
c277df42 | 3868 | - regrepeat_hard - repeatedly match something, report total lenth and length |
9041c2e3 | 3869 | * |
c277df42 IZ |
3870 | * The repeater is supposed to have constant length. |
3871 | */ | |
3872 | ||
76e3520e | 3873 | STATIC I32 |
cea2e8a9 | 3874 | S_regrepeat_hard(pTHX_ regnode *p, I32 max, I32 *lp) |
c277df42 | 3875 | { |
b7953727 | 3876 | register char *scan = Nullch; |
c277df42 | 3877 | register char *start; |
3280af22 | 3878 | register char *loceol = PL_regeol; |
a0ed51b3 | 3879 | I32 l = 0; |
708e3b05 | 3880 | I32 count = 0, res = 1; |
a0ed51b3 LW |
3881 | |
3882 | if (!max) | |
3883 | return 0; | |
c277df42 | 3884 | |
3280af22 | 3885 | start = PL_reginput; |
53c4c00c | 3886 | if (PL_reg_match_utf8) { |
708e3b05 | 3887 | while (PL_reginput < loceol && (scan = PL_reginput, res = regmatch(p))) { |
a0ed51b3 LW |
3888 | if (!count++) { |
3889 | l = 0; | |
3890 | while (start < PL_reginput) { | |
3891 | l++; | |
3892 | start += UTF8SKIP(start); | |
3893 | } | |
3894 | *lp = l; | |
3895 | if (l == 0) | |
3896 | return max; | |
3897 | } | |
3898 | if (count == max) | |
3899 | return count; | |
3900 | } | |
3901 | } | |
3902 | else { | |
708e3b05 | 3903 | while (PL_reginput < loceol && (scan = PL_reginput, res = regmatch(p))) { |
a0ed51b3 LW |
3904 | if (!count++) { |
3905 | *lp = l = PL_reginput - start; | |
3906 | if (max != REG_INFTY && l*max < loceol - scan) | |
3907 | loceol = scan + l*max; | |
3908 | if (l == 0) | |
3909 | return max; | |
c277df42 IZ |
3910 | } |
3911 | } | |
3912 | } | |
708e3b05 | 3913 | if (!res) |
3280af22 | 3914 | PL_reginput = scan; |
9041c2e3 | 3915 | |
a0ed51b3 | 3916 | return count; |
c277df42 IZ |
3917 | } |
3918 | ||
3919 | /* | |
ffc61ed2 JH |
3920 | - regclass_swash - prepare the utf8 swash |
3921 | */ | |
3922 | ||
3923 | SV * | |
3924 | Perl_regclass_swash(pTHX_ register regnode* node, bool doinit, SV** initsvp) | |
3925 | { | |
3926 | SV *sw = NULL; | |
3927 | SV *si = NULL; | |
3928 | ||
3929 | if (PL_regdata && PL_regdata->count) { | |
3930 | U32 n = ARG(node); | |
3931 | ||
3932 | if (PL_regdata->what[n] == 's') { | |
3933 | SV *rv = (SV*)PL_regdata->data[n]; | |
3934 | AV *av = (AV*)SvRV((SV*)rv); | |
3935 | SV **a; | |
9041c2e3 | 3936 | |
ffc61ed2 JH |
3937 | si = *av_fetch(av, 0, FALSE); |
3938 | a = av_fetch(av, 1, FALSE); | |
9041c2e3 | 3939 | |
ffc61ed2 JH |
3940 | if (a) |
3941 | sw = *a; | |
3942 | else if (si && doinit) { | |
3943 | sw = swash_init("utf8", "", si, 1, 0); | |
3944 | (void)av_store(av, 1, sw); | |
3945 | } | |
3946 | } | |
3947 | } | |
3948 | ||
3949 | if (initsvp) | |
3950 | *initsvp = si; | |
3951 | ||
3952 | return sw; | |
3953 | } | |
3954 | ||
3955 | /* | |
cb8d8820 | 3956 | - reginclass - determine if a character falls into a character class |
bbce6d69 | 3957 | */ |
3958 | ||
76e3520e | 3959 | STATIC bool |
ffc61ed2 | 3960 | S_reginclass(pTHX_ register regnode *n, register U8* p, register bool do_utf8) |
bbce6d69 | 3961 | { |
ffc61ed2 | 3962 | char flags = ANYOF_FLAGS(n); |
bbce6d69 | 3963 | bool match = FALSE; |
1aa99e6b | 3964 | UV c; |
3568d838 | 3965 | STRLEN len = 0; |
1aa99e6b | 3966 | |
3568d838 | 3967 | c = do_utf8 ? utf8_to_uvchr(p, &len) : *p; |
bbce6d69 | 3968 | |
ffc61ed2 JH |
3969 | if (do_utf8 || (flags & ANYOF_UNICODE)) { |
3970 | if (do_utf8 && !ANYOF_RUNTIME(n)) { | |
ffc61ed2 JH |
3971 | if (len != (STRLEN)-1 && c < 256 && ANYOF_BITMAP_TEST(n, c)) |
3972 | match = TRUE; | |
bbce6d69 | 3973 | } |
3568d838 | 3974 | if (!match && do_utf8 && (flags & ANYOF_UNICODE_ALL) && c >= 256) |
1aa99e6b | 3975 | match = TRUE; |
ffc61ed2 JH |
3976 | if (!match) { |
3977 | SV *sw = regclass_swash(n, TRUE, 0); | |
3978 | ||
3979 | if (sw) { | |
3568d838 | 3980 | if (swash_fetch(sw, p, do_utf8)) |
ffc61ed2 JH |
3981 | match = TRUE; |
3982 | else if (flags & ANYOF_FOLD) { | |
3983 | U8 tmpbuf[UTF8_MAXLEN+1]; | |
9041c2e3 | 3984 | |
ffc61ed2 JH |
3985 | if (flags & ANYOF_LOCALE) { |
3986 | PL_reg_flags |= RF_tainted; | |
9041c2e3 | 3987 | uvchr_to_utf8(tmpbuf, toLOWER_LC_utf8(p)); |
ffc61ed2 | 3988 | } |
1aa99e6b | 3989 | else |
9041c2e3 | 3990 | uvchr_to_utf8(tmpbuf, toLOWER_utf8(p)); |
3568d838 | 3991 | if (swash_fetch(sw, tmpbuf, do_utf8)) |
ffc61ed2 JH |
3992 | match = TRUE; |
3993 | } | |
3994 | } | |
bbce6d69 | 3995 | } |
3996 | } | |
1aa99e6b | 3997 | if (!match && c < 256) { |
ffc61ed2 JH |
3998 | if (ANYOF_BITMAP_TEST(n, c)) |
3999 | match = TRUE; | |
4000 | else if (flags & ANYOF_FOLD) { | |
3568d838 | 4001 | I32 f; |
a0ed51b3 | 4002 | |
ffc61ed2 JH |
4003 | if (flags & ANYOF_LOCALE) { |
4004 | PL_reg_flags |= RF_tainted; | |
4005 | f = PL_fold_locale[c]; | |
4006 | } | |
4007 | else | |
4008 | f = PL_fold[c]; | |
4009 | if (f != c && ANYOF_BITMAP_TEST(n, f)) | |
4010 | match = TRUE; | |
4011 | } | |
4012 | ||
4013 | if (!match && (flags & ANYOF_CLASS)) { | |
a0ed51b3 | 4014 | PL_reg_flags |= RF_tainted; |
ffc61ed2 JH |
4015 | if ( |
4016 | (ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) || | |
4017 | (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) || | |
4018 | (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) || | |
4019 | (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) || | |
4020 | (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) || | |
4021 | (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) || | |
4022 | (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) || | |
4023 | (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) || | |
4024 | (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) || | |
4025 | (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) || | |
4026 | (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII(c)) || | |
4027 | (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII(c)) || | |
4028 | (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) || | |
4029 | (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) || | |
4030 | (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) || | |
4031 | (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) || | |
4032 | (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) || | |
4033 | (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) || | |
4034 | (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) || | |
4035 | (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) || | |
4036 | (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) || | |
4037 | (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) || | |
4038 | (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) || | |
4039 | (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) || | |
4040 | (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) || | |
4041 | (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) || | |
4042 | (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) || | |
4043 | (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) || | |
4044 | (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK(c)) || | |
4045 | (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK(c)) | |
4046 | ) /* How's that for a conditional? */ | |
4047 | { | |
4048 | match = TRUE; | |
4049 | } | |
a0ed51b3 | 4050 | } |
a0ed51b3 LW |
4051 | } |
4052 | ||
a0ed51b3 LW |
4053 | return (flags & ANYOF_INVERT) ? !match : match; |
4054 | } | |
161b471a | 4055 | |
dfe13c55 | 4056 | STATIC U8 * |
cea2e8a9 | 4057 | S_reghop(pTHX_ U8 *s, I32 off) |
9041c2e3 | 4058 | { |
1aa99e6b IH |
4059 | return S_reghop3(aTHX_ s, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)); |
4060 | } | |
4061 | ||
4062 | STATIC U8 * | |
4063 | S_reghop3(pTHX_ U8 *s, I32 off, U8* lim) | |
9041c2e3 | 4064 | { |
a0ed51b3 | 4065 | if (off >= 0) { |
1aa99e6b | 4066 | while (off-- && s < lim) { |
ffc61ed2 | 4067 | /* XXX could check well-formedness here */ |
a0ed51b3 | 4068 | s += UTF8SKIP(s); |
ffc61ed2 | 4069 | } |
a0ed51b3 LW |
4070 | } |
4071 | else { | |
4072 | while (off++) { | |
1aa99e6b | 4073 | if (s > lim) { |
a0ed51b3 | 4074 | s--; |
ffc61ed2 | 4075 | if (UTF8_IS_CONTINUED(*s)) { |
1aa99e6b | 4076 | while (s > (U8*)lim && UTF8_IS_CONTINUATION(*s)) |
a0ed51b3 | 4077 | s--; |
ffc61ed2 JH |
4078 | } |
4079 | /* XXX could check well-formedness here */ | |
a0ed51b3 LW |
4080 | } |
4081 | } | |
4082 | } | |
4083 | return s; | |
4084 | } | |
161b471a | 4085 | |
dfe13c55 | 4086 | STATIC U8 * |
1aa99e6b | 4087 | S_reghopmaybe(pTHX_ U8 *s, I32 off) |
9041c2e3 | 4088 | { |
1aa99e6b IH |
4089 | return S_reghopmaybe3(aTHX_ s, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)); |
4090 | } | |
4091 | ||
4092 | STATIC U8 * | |
4093 | S_reghopmaybe3(pTHX_ U8* s, I32 off, U8* lim) | |
a0ed51b3 LW |
4094 | { |
4095 | if (off >= 0) { | |
1aa99e6b | 4096 | while (off-- && s < lim) { |
ffc61ed2 | 4097 | /* XXX could check well-formedness here */ |
a0ed51b3 | 4098 | s += UTF8SKIP(s); |
ffc61ed2 | 4099 | } |
a0ed51b3 LW |
4100 | if (off >= 0) |
4101 | return 0; | |
4102 | } | |
4103 | else { | |
4104 | while (off++) { | |
1aa99e6b | 4105 | if (s > lim) { |
a0ed51b3 | 4106 | s--; |
ffc61ed2 | 4107 | if (UTF8_IS_CONTINUED(*s)) { |
1aa99e6b | 4108 | while (s > (U8*)lim && UTF8_IS_CONTINUATION(*s)) |
a0ed51b3 | 4109 | s--; |
ffc61ed2 JH |
4110 | } |
4111 | /* XXX could check well-formedness here */ | |
a0ed51b3 LW |
4112 | } |
4113 | else | |
4114 | break; | |
4115 | } | |
4116 | if (off <= 0) | |
4117 | return 0; | |
4118 | } | |
4119 | return s; | |
4120 | } | |
51371543 | 4121 | |
51371543 | 4122 | static void |
acfe0abc | 4123 | restore_pos(pTHX_ void *arg) |
51371543 | 4124 | { |
51371543 GS |
4125 | if (PL_reg_eval_set) { |
4126 | if (PL_reg_oldsaved) { | |
4127 | PL_reg_re->subbeg = PL_reg_oldsaved; | |
4128 | PL_reg_re->sublen = PL_reg_oldsavedlen; | |
4129 | RX_MATCH_COPIED_on(PL_reg_re); | |
4130 | } | |
4131 | PL_reg_magic->mg_len = PL_reg_oldpos; | |
4132 | PL_reg_eval_set = 0; | |
4133 | PL_curpm = PL_reg_oldcurpm; | |
4134 | } | |
4135 | } |