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 | ||
40d34c0d SB |
8 | /* This file contains functions for executing a regular expression. See |
9 | * also regcomp.c which funnily enough, contains functions for compiling | |
10 | * a regular expression. | |
bb3580c7 NC |
11 | * |
12 | * This file is also copied at build time to ext/re/re_exec.c, where | |
13 | * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT. | |
14 | * This causes the main functions to be compiled under new names and with | |
15 | * debugging support added, which makes "use re 'debug'" work. | |
16 | ||
40d34c0d SB |
17 | */ |
18 | ||
a687059c LW |
19 | /* NOTE: this is derived from Henry Spencer's regexp code, and should not |
20 | * confused with the original package (see point 3 below). Thanks, Henry! | |
21 | */ | |
22 | ||
23 | /* Additional note: this code is very heavily munged from Henry's version | |
24 | * in places. In some spots I've traded clarity for efficiency, so don't | |
25 | * blame Henry for some of the lack of readability. | |
26 | */ | |
27 | ||
e50aee73 AD |
28 | /* The names of the functions have been changed from regcomp and |
29 | * regexec to pregcomp and pregexec in order to avoid conflicts | |
30 | * with the POSIX routines of the same names. | |
31 | */ | |
32 | ||
b9d5759e AD |
33 | #ifdef PERL_EXT_RE_BUILD |
34 | /* need to replace pregcomp et al, so enable that */ | |
35 | # ifndef PERL_IN_XSUB_RE | |
36 | # define PERL_IN_XSUB_RE | |
37 | # endif | |
38 | /* need access to debugger hooks */ | |
cad2e5aa | 39 | # if defined(PERL_EXT_RE_DEBUG) && !defined(DEBUGGING) |
b9d5759e AD |
40 | # define DEBUGGING |
41 | # endif | |
42 | #endif | |
43 | ||
44 | #ifdef PERL_IN_XSUB_RE | |
d06ea78c | 45 | /* We *really* need to overwrite these symbols: */ |
56953603 IZ |
46 | # define Perl_regexec_flags my_regexec |
47 | # define Perl_regdump my_regdump | |
48 | # define Perl_regprop my_regprop | |
cad2e5aa | 49 | # define Perl_re_intuit_start my_re_intuit_start |
d06ea78c GS |
50 | /* *These* symbols are masked to allow static link. */ |
51 | # define Perl_pregexec my_pregexec | |
9041c2e3 | 52 | # define Perl_reginitcolors my_reginitcolors |
490a3f88 | 53 | # define Perl_regclass_swash my_regclass_swash |
c5be433b GS |
54 | |
55 | # define PERL_NO_GET_CONTEXT | |
9041c2e3 | 56 | #endif |
56953603 | 57 | |
a687059c | 58 | /* |
e50aee73 | 59 | * pregcomp and pregexec -- regsub and regerror are not used in perl |
a687059c LW |
60 | * |
61 | * Copyright (c) 1986 by University of Toronto. | |
62 | * Written by Henry Spencer. Not derived from licensed software. | |
63 | * | |
64 | * Permission is granted to anyone to use this software for any | |
65 | * purpose on any computer system, and to redistribute it freely, | |
66 | * subject to the following restrictions: | |
67 | * | |
68 | * 1. The author is not responsible for the consequences of use of | |
69 | * this software, no matter how awful, even if they arise | |
70 | * from defects in it. | |
71 | * | |
72 | * 2. The origin of this software must not be misrepresented, either | |
73 | * by explicit claim or by omission. | |
74 | * | |
75 | * 3. Altered versions must be plainly marked as such, and must not | |
76 | * be misrepresented as being the original software. | |
77 | * | |
78 | **** Alterations to Henry's code are... | |
79 | **** | |
e6906430 | 80 | **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
04851bb3 | 81 | **** 2000, 2001, 2002, 2003, 2004, 2005, by Larry Wall and others |
a687059c | 82 | **** |
9ef589d8 LW |
83 | **** You may distribute under the terms of either the GNU General Public |
84 | **** License or the Artistic License, as specified in the README file. | |
a687059c LW |
85 | * |
86 | * Beware that some of this code is subtly aware of the way operator | |
87 | * precedence is structured in regular expressions. Serious changes in | |
88 | * regular-expression syntax might require a total rethink. | |
89 | */ | |
90 | #include "EXTERN.h" | |
864dbfa3 | 91 | #define PERL_IN_REGEXEC_C |
a687059c | 92 | #include "perl.h" |
0f5d15d6 | 93 | |
a687059c LW |
94 | #include "regcomp.h" |
95 | ||
c277df42 IZ |
96 | #define RF_tainted 1 /* tainted information used? */ |
97 | #define RF_warned 2 /* warned about big count? */ | |
ce862d02 | 98 | #define RF_evaled 4 /* Did an EVAL with setting? */ |
a0ed51b3 LW |
99 | #define RF_utf8 8 /* String contains multibyte chars? */ |
100 | ||
eb160463 | 101 | #define UTF ((PL_reg_flags & RF_utf8) != 0) |
ce862d02 IZ |
102 | |
103 | #define RS_init 1 /* eval environment created */ | |
104 | #define RS_set 2 /* replsv value is set */ | |
c277df42 | 105 | |
a687059c LW |
106 | #ifndef STATIC |
107 | #define STATIC static | |
108 | #endif | |
109 | ||
ba7b4546 | 110 | #define REGINCLASS(p,c) (ANYOF_FLAGS(p) ? reginclass(p,c,0,0) : ANYOF_BITMAP_TEST(p,*(c))) |
7d3e948e | 111 | |
c277df42 IZ |
112 | /* |
113 | * Forwards. | |
114 | */ | |
115 | ||
33b8afdf | 116 | #define CHR_SVLEN(sv) (do_utf8 ? sv_len_utf8(sv) : SvCUR(sv)) |
53c4c00c | 117 | #define CHR_DIST(a,b) (PL_reg_match_utf8 ? utf8_distance(a,b) : a - b) |
a0ed51b3 | 118 | |
dfe13c55 GS |
119 | #define reghop_c(pos,off) ((char*)reghop((U8*)pos, off)) |
120 | #define reghopmaybe_c(pos,off) ((char*)reghopmaybe((U8*)pos, off)) | |
53c4c00c JH |
121 | #define HOP(pos,off) (PL_reg_match_utf8 ? reghop((U8*)pos, off) : (U8*)(pos + off)) |
122 | #define HOPMAYBE(pos,off) (PL_reg_match_utf8 ? reghopmaybe((U8*)pos, off) : (U8*)(pos + off)) | |
dfe13c55 GS |
123 | #define HOPc(pos,off) ((char*)HOP(pos,off)) |
124 | #define HOPMAYBEc(pos,off) ((char*)HOPMAYBE(pos,off)) | |
a0d0e21e | 125 | |
efb30f32 | 126 | #define HOPBACK(pos, off) ( \ |
e54858b0 | 127 | (PL_reg_match_utf8) \ |
efb30f32 HS |
128 | ? reghopmaybe((U8*)pos, -off) \ |
129 | : (pos - off >= PL_bostr) \ | |
130 | ? (U8*)(pos - off) \ | |
131 | : (U8*)NULL \ | |
132 | ) | |
133 | #define HOPBACKc(pos, off) (char*)HOPBACK(pos, off) | |
134 | ||
1aa99e6b IH |
135 | #define reghop3_c(pos,off,lim) ((char*)reghop3((U8*)pos, off, (U8*)lim)) |
136 | #define reghopmaybe3_c(pos,off,lim) ((char*)reghopmaybe3((U8*)pos, off, (U8*)lim)) | |
53c4c00c JH |
137 | #define HOP3(pos,off,lim) (PL_reg_match_utf8 ? reghop3((U8*)pos, off, (U8*)lim) : (U8*)(pos + off)) |
138 | #define HOPMAYBE3(pos,off,lim) (PL_reg_match_utf8 ? reghopmaybe3((U8*)pos, off, (U8*)lim) : (U8*)(pos + off)) | |
1aa99e6b IH |
139 | #define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim)) |
140 | #define HOPMAYBE3c(pos,off,lim) ((char*)HOPMAYBE3(pos,off,lim)) | |
141 | ||
fab1f349 | 142 | #define LOAD_UTF8_CHARCLASS(class,str) STMT_START { \ |
47a91a97 | 143 | if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((U8*)str); assert(ok); LEAVE; } } STMT_END |
fab1f349 AL |
144 | #define LOAD_UTF8_CHARCLASS_ALNUM() LOAD_UTF8_CHARCLASS(alnum,"a") |
145 | #define LOAD_UTF8_CHARCLASS_DIGIT() LOAD_UTF8_CHARCLASS(digit,"0") | |
146 | #define LOAD_UTF8_CHARCLASS_SPACE() LOAD_UTF8_CHARCLASS(space," ") | |
147 | #define LOAD_UTF8_CHARCLASS_MARK() LOAD_UTF8_CHARCLASS(mark, "\xcd\x86") | |
51371543 | 148 | |
5f80c4cf | 149 | /* for use after a quantifier and before an EXACT-like node -- japhy */ |
e2d8ce26 JP |
150 | #define JUMPABLE(rn) ( \ |
151 | OP(rn) == OPEN || OP(rn) == CLOSE || OP(rn) == EVAL || \ | |
cca55fe3 JP |
152 | OP(rn) == SUSPEND || OP(rn) == IFMATCH || \ |
153 | OP(rn) == PLUS || OP(rn) == MINMOD || \ | |
154 | (PL_regkind[(U8)OP(rn)] == CURLY && ARG1(rn) > 0) \ | |
e2d8ce26 JP |
155 | ) |
156 | ||
cca55fe3 JP |
157 | #define HAS_TEXT(rn) ( \ |
158 | PL_regkind[(U8)OP(rn)] == EXACT || PL_regkind[(U8)OP(rn)] == REF \ | |
159 | ) | |
e2d8ce26 | 160 | |
a84d97b6 HS |
161 | /* |
162 | Search for mandatory following text node; for lookahead, the text must | |
163 | follow but for lookbehind (rn->flags != 0) we skip to the next step. | |
164 | */ | |
cca55fe3 | 165 | #define FIND_NEXT_IMPT(rn) STMT_START { \ |
e2d8ce26 | 166 | while (JUMPABLE(rn)) \ |
a84d97b6 | 167 | if (OP(rn) == SUSPEND || PL_regkind[(U8)OP(rn)] == CURLY) \ |
e2d8ce26 | 168 | rn = NEXTOPER(NEXTOPER(rn)); \ |
cca55fe3 JP |
169 | else if (OP(rn) == PLUS) \ |
170 | rn = NEXTOPER(rn); \ | |
a84d97b6 HS |
171 | else if (OP(rn) == IFMATCH) \ |
172 | rn = (rn->flags == 0) ? NEXTOPER(NEXTOPER(rn)) : rn + ARG(rn); \ | |
e2d8ce26 | 173 | else rn += NEXT_OFF(rn); \ |
5f80c4cf | 174 | } STMT_END |
74750237 | 175 | |
acfe0abc | 176 | static void restore_pos(pTHX_ void *arg); |
51371543 | 177 | |
76e3520e | 178 | STATIC CHECKPOINT |
cea2e8a9 | 179 | S_regcppush(pTHX_ I32 parenfloor) |
a0d0e21e | 180 | { |
8c18bf38 | 181 | const int retval = PL_savestack_ix; |
b1ce53c5 | 182 | #define REGCP_PAREN_ELEMS 4 |
8c18bf38 | 183 | const int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS; |
a0d0e21e LW |
184 | int p; |
185 | ||
e49a9654 IH |
186 | if (paren_elems_to_push < 0) |
187 | Perl_croak(aTHX_ "panic: paren_elems_to_push < 0"); | |
188 | ||
a01268b5 | 189 | #define REGCP_OTHER_ELEMS 6 |
f3479639 | 190 | SSGROW(paren_elems_to_push + REGCP_OTHER_ELEMS); |
3280af22 | 191 | for (p = PL_regsize; p > parenfloor; p--) { |
b1ce53c5 | 192 | /* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */ |
cf93c79d IZ |
193 | SSPUSHINT(PL_regendp[p]); |
194 | SSPUSHINT(PL_regstartp[p]); | |
3280af22 | 195 | SSPUSHPTR(PL_reg_start_tmp[p]); |
a0d0e21e LW |
196 | SSPUSHINT(p); |
197 | } | |
b1ce53c5 | 198 | /* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */ |
3280af22 NIS |
199 | SSPUSHINT(PL_regsize); |
200 | SSPUSHINT(*PL_reglastparen); | |
a01268b5 | 201 | SSPUSHINT(*PL_reglastcloseparen); |
3280af22 | 202 | SSPUSHPTR(PL_reginput); |
41123dfd JH |
203 | #define REGCP_FRAME_ELEMS 2 |
204 | /* REGCP_FRAME_ELEMS are part of the REGCP_OTHER_ELEMS and | |
205 | * are needed for the regexp context stack bookkeeping. */ | |
206 | SSPUSHINT(paren_elems_to_push + REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS); | |
b1ce53c5 | 207 | SSPUSHINT(SAVEt_REGCONTEXT); /* Magic cookie. */ |
41123dfd | 208 | |
a0d0e21e LW |
209 | return retval; |
210 | } | |
211 | ||
c277df42 | 212 | /* These are needed since we do not localize EVAL nodes: */ |
02db2b7b | 213 | # define REGCP_SET(cp) DEBUG_r(PerlIO_printf(Perl_debug_log, \ |
faccc32b | 214 | " Setting an EVAL scope, savestack=%"IVdf"\n", \ |
02db2b7b | 215 | (IV)PL_savestack_ix)); cp = PL_savestack_ix |
c3464db5 | 216 | |
02db2b7b | 217 | # define REGCP_UNWIND(cp) DEBUG_r(cp != PL_savestack_ix ? \ |
c3464db5 | 218 | PerlIO_printf(Perl_debug_log, \ |
faccc32b | 219 | " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \ |
02db2b7b | 220 | (IV)(cp), (IV)PL_savestack_ix) : 0); regcpblow(cp) |
c277df42 | 221 | |
76e3520e | 222 | STATIC char * |
cea2e8a9 | 223 | S_regcppop(pTHX) |
a0d0e21e | 224 | { |
b1ce53c5 | 225 | I32 i; |
a0d0e21e LW |
226 | U32 paren = 0; |
227 | char *input; | |
b1ce53c5 JH |
228 | |
229 | /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */ | |
a0d0e21e | 230 | i = SSPOPINT; |
b1ce53c5 JH |
231 | assert(i == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */ |
232 | i = SSPOPINT; /* Parentheses elements to pop. */ | |
a0d0e21e | 233 | input = (char *) SSPOPPTR; |
a01268b5 | 234 | *PL_reglastcloseparen = SSPOPINT; |
3280af22 NIS |
235 | *PL_reglastparen = SSPOPINT; |
236 | PL_regsize = SSPOPINT; | |
b1ce53c5 JH |
237 | |
238 | /* Now restore the parentheses context. */ | |
41123dfd JH |
239 | for (i -= (REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS); |
240 | i > 0; i -= REGCP_PAREN_ELEMS) { | |
228fe6e6 | 241 | I32 tmps; |
a0d0e21e | 242 | paren = (U32)SSPOPINT; |
3280af22 | 243 | PL_reg_start_tmp[paren] = (char *) SSPOPPTR; |
cf93c79d IZ |
244 | PL_regstartp[paren] = SSPOPINT; |
245 | tmps = SSPOPINT; | |
3280af22 NIS |
246 | if (paren <= *PL_reglastparen) |
247 | PL_regendp[paren] = tmps; | |
c277df42 | 248 | DEBUG_r( |
c3464db5 | 249 | PerlIO_printf(Perl_debug_log, |
b900a521 | 250 | " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n", |
9041c2e3 | 251 | (UV)paren, (IV)PL_regstartp[paren], |
b900a521 | 252 | (IV)(PL_reg_start_tmp[paren] - PL_bostr), |
9041c2e3 | 253 | (IV)PL_regendp[paren], |
3280af22 | 254 | (paren > *PL_reglastparen ? "(no)" : "")); |
c277df42 | 255 | ); |
a0d0e21e | 256 | } |
c277df42 | 257 | DEBUG_r( |
eb160463 | 258 | if ((I32)(*PL_reglastparen + 1) <= PL_regnpar) { |
c3464db5 | 259 | PerlIO_printf(Perl_debug_log, |
faccc32b JH |
260 | " restoring \\%"IVdf"..\\%"IVdf" to undef\n", |
261 | (IV)(*PL_reglastparen + 1), (IV)PL_regnpar); | |
c277df42 IZ |
262 | } |
263 | ); | |
daf18116 | 264 | #if 1 |
dafc8851 JH |
265 | /* It would seem that the similar code in regtry() |
266 | * already takes care of this, and in fact it is in | |
267 | * a better location to since this code can #if 0-ed out | |
268 | * but the code in regtry() is needed or otherwise tests | |
269 | * requiring null fields (pat.t#187 and split.t#{13,14} | |
daf18116 JH |
270 | * (as of patchlevel 7877) will fail. Then again, |
271 | * this code seems to be necessary or otherwise | |
272 | * building DynaLoader will fail: | |
273 | * "Error: '*' not in typemap in DynaLoader.xs, line 164" | |
274 | * --jhi */ | |
eb160463 GS |
275 | for (paren = *PL_reglastparen + 1; (I32)paren <= PL_regnpar; paren++) { |
276 | if ((I32)paren > PL_regsize) | |
cf93c79d IZ |
277 | PL_regstartp[paren] = -1; |
278 | PL_regendp[paren] = -1; | |
a0d0e21e | 279 | } |
dafc8851 | 280 | #endif |
a0d0e21e LW |
281 | return input; |
282 | } | |
283 | ||
0f5d15d6 | 284 | STATIC char * |
cea2e8a9 | 285 | S_regcp_set_to(pTHX_ I32 ss) |
0f5d15d6 | 286 | { |
8c18bf38 | 287 | const I32 tmp = PL_savestack_ix; |
0f5d15d6 IZ |
288 | |
289 | PL_savestack_ix = ss; | |
290 | regcppop(); | |
291 | PL_savestack_ix = tmp; | |
942e002e | 292 | return Nullch; |
0f5d15d6 IZ |
293 | } |
294 | ||
295 | typedef struct re_cc_state | |
296 | { | |
297 | I32 ss; | |
298 | regnode *node; | |
299 | struct re_cc_state *prev; | |
300 | CURCUR *cc; | |
301 | regexp *re; | |
302 | } re_cc_state; | |
303 | ||
02db2b7b | 304 | #define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */ |
a0d0e21e | 305 | |
29d1e993 HS |
306 | #define TRYPAREN(paren, n, input) { \ |
307 | if (paren) { \ | |
308 | if (n) { \ | |
309 | PL_regstartp[paren] = HOPc(input, -1) - PL_bostr; \ | |
310 | PL_regendp[paren] = input - PL_bostr; \ | |
311 | } \ | |
312 | else \ | |
313 | PL_regendp[paren] = -1; \ | |
314 | } \ | |
315 | if (regmatch(next)) \ | |
316 | sayYES; \ | |
317 | if (paren && n) \ | |
318 | PL_regendp[paren] = -1; \ | |
319 | } | |
320 | ||
321 | ||
a687059c | 322 | /* |
e50aee73 | 323 | * pregexec and friends |
a687059c LW |
324 | */ |
325 | ||
326 | /* | |
c277df42 | 327 | - pregexec - match a regexp against a string |
a687059c | 328 | */ |
c277df42 | 329 | I32 |
864dbfa3 | 330 | Perl_pregexec(pTHX_ register regexp *prog, char *stringarg, register char *strend, |
c3464db5 | 331 | char *strbeg, I32 minend, SV *screamer, U32 nosave) |
c277df42 IZ |
332 | /* strend: pointer to null at end of string */ |
333 | /* strbeg: real beginning of string */ | |
334 | /* minend: end of match must be >=minend after stringarg. */ | |
335 | /* nosave: For optimizations. */ | |
336 | { | |
337 | return | |
9041c2e3 | 338 | regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL, |
c277df42 IZ |
339 | nosave ? 0 : REXEC_COPY_STR); |
340 | } | |
0f5d15d6 IZ |
341 | |
342 | STATIC void | |
cea2e8a9 | 343 | S_cache_re(pTHX_ regexp *prog) |
0f5d15d6 IZ |
344 | { |
345 | PL_regprecomp = prog->precomp; /* Needed for FAIL. */ | |
346 | #ifdef DEBUGGING | |
347 | PL_regprogram = prog->program; | |
348 | #endif | |
349 | PL_regnpar = prog->nparens; | |
9041c2e3 NIS |
350 | PL_regdata = prog->data; |
351 | PL_reg_re = prog; | |
0f5d15d6 | 352 | } |
22e551b9 | 353 | |
9041c2e3 | 354 | /* |
cad2e5aa JH |
355 | * Need to implement the following flags for reg_anch: |
356 | * | |
357 | * USE_INTUIT_NOML - Useful to call re_intuit_start() first | |
358 | * USE_INTUIT_ML | |
359 | * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer | |
360 | * INTUIT_AUTORITATIVE_ML | |
361 | * INTUIT_ONCE_NOML - Intuit can match in one location only. | |
362 | * INTUIT_ONCE_ML | |
363 | * | |
364 | * Another flag for this function: SECOND_TIME (so that float substrs | |
365 | * with giant delta may be not rechecked). | |
366 | */ | |
367 | ||
368 | /* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */ | |
369 | ||
fdac8c4b | 370 | /* If SCREAM, then SvPVX_const(sv) should be compatible with strpos and strend. |
cad2e5aa JH |
371 | Otherwise, only SvCUR(sv) is used to get strbeg. */ |
372 | ||
373 | /* XXXX We assume that strpos is strbeg unless sv. */ | |
374 | ||
6eb5f6b9 JH |
375 | /* XXXX Some places assume that there is a fixed substring. |
376 | An update may be needed if optimizer marks as "INTUITable" | |
377 | RExen without fixed substrings. Similarly, it is assumed that | |
378 | lengths of all the strings are no more than minlen, thus they | |
379 | cannot come from lookahead. | |
380 | (Or minlen should take into account lookahead.) */ | |
381 | ||
2c2d71f5 JH |
382 | /* A failure to find a constant substring means that there is no need to make |
383 | an expensive call to REx engine, thus we celebrate a failure. Similarly, | |
384 | finding a substring too deep into the string means that less calls to | |
30944b6d IZ |
385 | regtry() should be needed. |
386 | ||
387 | REx compiler's optimizer found 4 possible hints: | |
388 | a) Anchored substring; | |
389 | b) Fixed substring; | |
390 | c) Whether we are anchored (beginning-of-line or \G); | |
391 | d) First node (of those at offset 0) which may distingush positions; | |
6eb5f6b9 | 392 | We use a)b)d) and multiline-part of c), and try to find a position in the |
30944b6d IZ |
393 | string which does not contradict any of them. |
394 | */ | |
2c2d71f5 | 395 | |
6eb5f6b9 JH |
396 | /* Most of decisions we do here should have been done at compile time. |
397 | The nodes of the REx which we used for the search should have been | |
398 | deleted from the finite automaton. */ | |
399 | ||
cad2e5aa JH |
400 | char * |
401 | Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, | |
402 | char *strend, U32 flags, re_scream_pos_data *data) | |
403 | { | |
b7953727 | 404 | register I32 start_shift = 0; |
cad2e5aa | 405 | /* Should be nonnegative! */ |
b7953727 | 406 | register I32 end_shift = 0; |
2c2d71f5 JH |
407 | register char *s; |
408 | register SV *check; | |
a1933d95 | 409 | char *strbeg; |
cad2e5aa | 410 | char *t; |
8c18bf38 | 411 | const int do_utf8 = sv ? SvUTF8(sv) : 0; /* if no sv we have to assume bytes */ |
cad2e5aa | 412 | I32 ml_anch; |
6eb5f6b9 | 413 | register char *other_last = Nullch; /* other substr checked before this */ |
b7953727 | 414 | char *check_at = Nullch; /* check substr found at this pos */ |
30944b6d | 415 | #ifdef DEBUGGING |
c6d79d47 AL |
416 | const char * const i_strpos = strpos; |
417 | SV * const dsv = PERL_DEBUG_PAD_ZERO(0); | |
30944b6d | 418 | #endif |
2ea5368e | 419 | RX_MATCH_UTF8_set(prog,do_utf8); |
cad2e5aa | 420 | |
b8d68ded JH |
421 | if (prog->reganch & ROPT_UTF8) { |
422 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
423 | "UTF-8 regex...\n")); | |
424 | PL_reg_flags |= RF_utf8; | |
425 | } | |
426 | ||
2a782b5b | 427 | DEBUG_r({ |
228fe6e6 | 428 | const char *s = PL_reg_match_utf8 ? |
c728cb41 JH |
429 | sv_uni_display(dsv, sv, 60, UNI_DISPLAY_REGEX) : |
430 | strpos; | |
228fe6e6 | 431 | const int len = PL_reg_match_utf8 ? |
b8d68ded | 432 | strlen(s) : strend - strpos; |
2a782b5b JH |
433 | if (!PL_colorset) |
434 | reginitcolors(); | |
b8d68ded JH |
435 | if (PL_reg_match_utf8) |
436 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
437 | "UTF-8 target...\n")); | |
2a782b5b | 438 | PerlIO_printf(Perl_debug_log, |
5332c881 | 439 | "%sGuessing start of match, REx%s \"%s%.60s%s%s\" against \"%s%.*s%s%s\"...\n", |
2a782b5b JH |
440 | PL_colors[4],PL_colors[5],PL_colors[0], |
441 | prog->precomp, | |
442 | PL_colors[1], | |
443 | (strlen(prog->precomp) > 60 ? "..." : ""), | |
444 | PL_colors[0], | |
445 | (int)(len > 60 ? 60 : len), | |
446 | s, PL_colors[1], | |
447 | (len > 60 ? "..." : "") | |
448 | ); | |
449 | }); | |
cad2e5aa | 450 | |
c344f387 JH |
451 | /* CHR_DIST() would be more correct here but it makes things slow. */ |
452 | if (prog->minlen > strend - strpos) { | |
a72c7584 JH |
453 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
454 | "String too short... [re_intuit_start]\n")); | |
cad2e5aa | 455 | goto fail; |
2c2d71f5 | 456 | } |
a1933d95 | 457 | strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos; |
1aa99e6b | 458 | PL_regeol = strend; |
33b8afdf JH |
459 | if (do_utf8) { |
460 | if (!prog->check_utf8 && prog->check_substr) | |
461 | to_utf8_substr(prog); | |
462 | check = prog->check_utf8; | |
463 | } else { | |
464 | if (!prog->check_substr && prog->check_utf8) | |
465 | to_byte_substr(prog); | |
466 | check = prog->check_substr; | |
467 | } | |
468 | if (check == &PL_sv_undef) { | |
469 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
470 | "Non-utf string cannot match utf check string\n")); | |
471 | goto fail; | |
472 | } | |
2c2d71f5 | 473 | if (prog->reganch & ROPT_ANCH) { /* Match at beg-of-str or after \n */ |
cad2e5aa JH |
474 | ml_anch = !( (prog->reganch & ROPT_ANCH_SINGLE) |
475 | || ( (prog->reganch & ROPT_ANCH_BOL) | |
2c2d71f5 | 476 | && !PL_multiline ) ); /* Check after \n? */ |
cad2e5aa | 477 | |
7e25d62c JH |
478 | if (!ml_anch) { |
479 | if ( !(prog->reganch & (ROPT_ANCH_GPOS /* Checked by the caller */ | |
480 | | ROPT_IMPLICIT)) /* not a real BOL */ | |
fdac8c4b | 481 | /* SvCUR is not set on references: SvRV and SvPVX_const overlap */ |
7e25d62c JH |
482 | && sv && !SvROK(sv) |
483 | && (strpos != strbeg)) { | |
484 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Not at start...\n")); | |
485 | goto fail; | |
486 | } | |
487 | if (prog->check_offset_min == prog->check_offset_max && | |
cce850e4 | 488 | !(prog->reganch & ROPT_CANY_SEEN)) { |
2c2d71f5 | 489 | /* Substring at constant offset from beg-of-str... */ |
cad2e5aa JH |
490 | I32 slen; |
491 | ||
1aa99e6b | 492 | s = HOP3c(strpos, prog->check_offset_min, strend); |
653099ff GS |
493 | if (SvTAIL(check)) { |
494 | slen = SvCUR(check); /* >= 1 */ | |
cad2e5aa | 495 | |
9041c2e3 | 496 | if ( strend - s > slen || strend - s < slen - 1 |
2c2d71f5 JH |
497 | || (strend - s == slen && strend[-1] != '\n')) { |
498 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String too long...\n")); | |
499 | goto fail_finish; | |
cad2e5aa JH |
500 | } |
501 | /* Now should match s[0..slen-2] */ | |
502 | slen--; | |
fdac8c4b | 503 | if (slen && (*SvPVX_const(check) != *s |
cad2e5aa | 504 | || (slen > 1 |
fdac8c4b | 505 | && memNE(SvPVX_const(check), s, slen)))) { |
2c2d71f5 JH |
506 | report_neq: |
507 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String not equal...\n")); | |
508 | goto fail_finish; | |
509 | } | |
cad2e5aa | 510 | } |
fdac8c4b | 511 | else if (*SvPVX_const(check) != *s |
653099ff | 512 | || ((slen = SvCUR(check)) > 1 |
fdac8c4b | 513 | && memNE(SvPVX_const(check), s, slen))) |
2c2d71f5 JH |
514 | goto report_neq; |
515 | goto success_at_start; | |
7e25d62c | 516 | } |
cad2e5aa | 517 | } |
2c2d71f5 | 518 | /* Match is anchored, but substr is not anchored wrt beg-of-str. */ |
cad2e5aa | 519 | s = strpos; |
2c2d71f5 | 520 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
2c2d71f5 | 521 | end_shift = prog->minlen - start_shift - |
653099ff | 522 | CHR_SVLEN(check) + (SvTAIL(check) != 0); |
2c2d71f5 | 523 | if (!ml_anch) { |
8c18bf38 | 524 | const I32 end = prog->check_offset_max + CHR_SVLEN(check) |
653099ff | 525 | - (SvTAIL(check) != 0); |
8c18bf38 | 526 | const I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end; |
2c2d71f5 JH |
527 | |
528 | if (end_shift < eshift) | |
529 | end_shift = eshift; | |
530 | } | |
cad2e5aa | 531 | } |
2c2d71f5 | 532 | else { /* Can match at random position */ |
cad2e5aa JH |
533 | ml_anch = 0; |
534 | s = strpos; | |
2c2d71f5 JH |
535 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
536 | /* Should be nonnegative! */ | |
537 | end_shift = prog->minlen - start_shift - | |
653099ff | 538 | CHR_SVLEN(check) + (SvTAIL(check) != 0); |
cad2e5aa JH |
539 | } |
540 | ||
2c2d71f5 | 541 | #ifdef DEBUGGING /* 7/99: reports of failure (with the older version) */ |
0033605d | 542 | if (end_shift < 0) |
6bbae5e6 | 543 | Perl_croak(aTHX_ "panic: end_shift"); |
2c2d71f5 JH |
544 | #endif |
545 | ||
2c2d71f5 JH |
546 | restart: |
547 | /* Find a possible match in the region s..strend by looking for | |
548 | the "check" substring in the region corrected by start/end_shift. */ | |
cad2e5aa | 549 | if (flags & REXEC_SCREAM) { |
cad2e5aa | 550 | I32 p = -1; /* Internal iterator of scream. */ |
8c18bf38 | 551 | I32 * const pp = data ? data->scream_pos : &p; |
cad2e5aa | 552 | |
2c2d71f5 JH |
553 | if (PL_screamfirst[BmRARE(check)] >= 0 |
554 | || ( BmRARE(check) == '\n' | |
555 | && (BmPREVIOUS(check) == SvCUR(check) - 1) | |
556 | && SvTAIL(check) )) | |
9041c2e3 | 557 | s = screaminstr(sv, check, |
2c2d71f5 | 558 | start_shift + (s - strbeg), end_shift, pp, 0); |
cad2e5aa | 559 | else |
2c2d71f5 | 560 | goto fail_finish; |
88af3bc3 JH |
561 | /* we may be pointing at the wrong string */ |
562 | if (s && RX_MATCH_COPIED(prog)) | |
fdac8c4b | 563 | s = strbeg + (s - SvPVX_const(sv)); |
cad2e5aa JH |
564 | if (data) |
565 | *data->scream_olds = s; | |
566 | } | |
f33976b4 | 567 | else if (prog->reganch & ROPT_CANY_SEEN) |
3baa4c62 JH |
568 | s = fbm_instr((U8*)(s + start_shift), |
569 | (U8*)(strend - end_shift), | |
570 | check, PL_multiline ? FBMrf_MULTILINE : 0); | |
cad2e5aa | 571 | else |
1aa99e6b IH |
572 | s = fbm_instr(HOP3(s, start_shift, strend), |
573 | HOP3(strend, -end_shift, strbeg), | |
2c2d71f5 | 574 | check, PL_multiline ? FBMrf_MULTILINE : 0); |
cad2e5aa JH |
575 | |
576 | /* Update the count-of-usability, remove useless subpatterns, | |
577 | unshift s. */ | |
2c2d71f5 | 578 | |
5332c881 AL |
579 | /* FIXME - DEBUG_EXECUTE_r if that is merged to maint. */ |
580 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%s %s substr \"%s%.*s%s\"%s%s", | |
2c2d71f5 | 581 | (s ? "Found" : "Did not find"), |
33b8afdf | 582 | (check == (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) ? "anchored" : "floating"), |
2c2d71f5 | 583 | PL_colors[0], |
7b0972df | 584 | (int)(SvCUR(check) - (SvTAIL(check)!=0)), |
fdac8c4b | 585 | SvPVX_const(check), |
2c2d71f5 JH |
586 | PL_colors[1], (SvTAIL(check) ? "$" : ""), |
587 | (s ? " at offset " : "...\n") ) ); | |
588 | ||
589 | if (!s) | |
590 | goto fail_finish; | |
591 | ||
6eb5f6b9 JH |
592 | check_at = s; |
593 | ||
2c2d71f5 | 594 | /* Finish the diagnostic message */ |
30944b6d | 595 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) ); |
2c2d71f5 JH |
596 | |
597 | /* Got a candidate. Check MBOL anchoring, and the *other* substr. | |
598 | Start with the other substr. | |
599 | XXXX no SCREAM optimization yet - and a very coarse implementation | |
5332c881 | 600 | XXXX /ttx+/ results in anchored="ttx", floating="x". floating will |
2c2d71f5 JH |
601 | *always* match. Probably should be marked during compile... |
602 | Probably it is right to do no SCREAM here... | |
603 | */ | |
604 | ||
33b8afdf | 605 | if (do_utf8 ? (prog->float_utf8 && prog->anchored_utf8) : (prog->float_substr && prog->anchored_substr)) { |
30944b6d | 606 | /* Take into account the "other" substring. */ |
2c2d71f5 JH |
607 | /* XXXX May be hopelessly wrong for UTF... */ |
608 | if (!other_last) | |
6eb5f6b9 | 609 | other_last = strpos; |
33b8afdf | 610 | if (check == (do_utf8 ? prog->float_utf8 : prog->float_substr)) { |
30944b6d IZ |
611 | do_other_anchored: |
612 | { | |
c6d79d47 AL |
613 | char * const last = HOP3c(s, -start_shift, strbeg); |
614 | char *last1, *last2; | |
2c2d71f5 | 615 | char *s1 = s; |
33b8afdf | 616 | SV* must; |
2c2d71f5 | 617 | |
2c2d71f5 JH |
618 | t = s - prog->check_offset_max; |
619 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ | |
1d86a7f9 | 620 | && (!do_utf8 |
1aa99e6b | 621 | || ((t = reghopmaybe3_c(s, -(prog->check_offset_max), strpos)) |
2c2d71f5 | 622 | && t > strpos))) |
30944b6d | 623 | /* EMPTY */; |
2c2d71f5 JH |
624 | else |
625 | t = strpos; | |
1aa99e6b | 626 | t = HOP3c(t, prog->anchored_offset, strend); |
6eb5f6b9 JH |
627 | if (t < other_last) /* These positions already checked */ |
628 | t = other_last; | |
1aa99e6b | 629 | last2 = last1 = HOP3c(strend, -prog->minlen, strbeg); |
2c2d71f5 JH |
630 | if (last < last1) |
631 | last1 = last; | |
632 | /* XXXX It is not documented what units *_offsets are in. Assume bytes. */ | |
633 | /* On end-of-str: see comment below. */ | |
33b8afdf JH |
634 | must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr; |
635 | if (must == &PL_sv_undef) { | |
636 | s = (char*)NULL; | |
637 | DEBUG_r(must = prog->anchored_utf8); /* for debug */ | |
638 | } | |
639 | else | |
640 | s = fbm_instr( | |
641 | (unsigned char*)t, | |
642 | HOP3(HOP3(last1, prog->anchored_offset, strend) | |
643 | + SvCUR(must), -(SvTAIL(must)!=0), strbeg), | |
644 | must, | |
645 | PL_multiline ? FBMrf_MULTILINE : 0 | |
646 | ); | |
1aa99e6b | 647 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
5332c881 | 648 | "%s anchored substr \"%s%.*s%s\"%s", |
2c2d71f5 JH |
649 | (s ? "Found" : "Contradicts"), |
650 | PL_colors[0], | |
33b8afdf JH |
651 | (int)(SvCUR(must) |
652 | - (SvTAIL(must)!=0)), | |
fdac8c4b | 653 | SvPVX_const(must), |
33b8afdf | 654 | PL_colors[1], (SvTAIL(must) ? "$" : ""))); |
2c2d71f5 JH |
655 | if (!s) { |
656 | if (last1 >= last2) { | |
657 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
658 | ", giving up...\n")); | |
659 | goto fail_finish; | |
660 | } | |
661 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
662 | ", trying floating at offset %ld...\n", | |
1aa99e6b IH |
663 | (long)(HOP3c(s1, 1, strend) - i_strpos))); |
664 | other_last = HOP3c(last1, prog->anchored_offset+1, strend); | |
665 | s = HOP3c(last, 1, strend); | |
2c2d71f5 JH |
666 | goto restart; |
667 | } | |
668 | else { | |
669 | DEBUG_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", | |
30944b6d | 670 | (long)(s - i_strpos))); |
1aa99e6b IH |
671 | t = HOP3c(s, -prog->anchored_offset, strbeg); |
672 | other_last = HOP3c(s, 1, strend); | |
30944b6d | 673 | s = s1; |
2c2d71f5 JH |
674 | if (t == strpos) |
675 | goto try_at_start; | |
2c2d71f5 JH |
676 | goto try_at_offset; |
677 | } | |
30944b6d | 678 | } |
2c2d71f5 JH |
679 | } |
680 | else { /* Take into account the floating substring. */ | |
33b8afdf JH |
681 | char *last, *last1; |
682 | char *s1 = s; | |
683 | SV* must; | |
684 | ||
685 | t = HOP3c(s, -start_shift, strbeg); | |
686 | last1 = last = | |
687 | HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg); | |
688 | if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset) | |
689 | last = HOP3c(t, prog->float_max_offset, strend); | |
690 | s = HOP3c(t, prog->float_min_offset, strend); | |
691 | if (s < other_last) | |
692 | s = other_last; | |
2c2d71f5 | 693 | /* XXXX It is not documented what units *_offsets are in. Assume bytes. */ |
33b8afdf JH |
694 | must = do_utf8 ? prog->float_utf8 : prog->float_substr; |
695 | /* fbm_instr() takes into account exact value of end-of-str | |
696 | if the check is SvTAIL(ed). Since false positives are OK, | |
697 | and end-of-str is not later than strend we are OK. */ | |
698 | if (must == &PL_sv_undef) { | |
699 | s = (char*)NULL; | |
700 | DEBUG_r(must = prog->float_utf8); /* for debug message */ | |
701 | } | |
702 | else | |
2c2d71f5 | 703 | s = fbm_instr((unsigned char*)s, |
33b8afdf JH |
704 | (unsigned char*)last + SvCUR(must) |
705 | - (SvTAIL(must)!=0), | |
706 | must, PL_multiline ? FBMrf_MULTILINE : 0); | |
5332c881 AL |
707 | /* FIXME - DEBUG_EXECUTE_r if that is merged to maint */ |
708 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%s floating substr \"%s%.*s%s\"%s", | |
33b8afdf JH |
709 | (s ? "Found" : "Contradicts"), |
710 | PL_colors[0], | |
711 | (int)(SvCUR(must) - (SvTAIL(must)!=0)), | |
fdac8c4b | 712 | SvPVX_const(must), |
33b8afdf JH |
713 | PL_colors[1], (SvTAIL(must) ? "$" : ""))); |
714 | if (!s) { | |
715 | if (last1 == last) { | |
2c2d71f5 | 716 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
33b8afdf JH |
717 | ", giving up...\n")); |
718 | goto fail_finish; | |
2c2d71f5 | 719 | } |
33b8afdf JH |
720 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
721 | ", trying anchored starting at offset %ld...\n", | |
722 | (long)(s1 + 1 - i_strpos))); | |
723 | other_last = last; | |
724 | s = HOP3c(t, 1, strend); | |
725 | goto restart; | |
726 | } | |
727 | else { | |
728 | DEBUG_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", | |
729 | (long)(s - i_strpos))); | |
730 | other_last = s; /* Fix this later. --Hugo */ | |
731 | s = s1; | |
732 | if (t == strpos) | |
733 | goto try_at_start; | |
734 | goto try_at_offset; | |
735 | } | |
2c2d71f5 | 736 | } |
cad2e5aa | 737 | } |
2c2d71f5 JH |
738 | |
739 | t = s - prog->check_offset_max; | |
2c2d71f5 | 740 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ |
1d86a7f9 | 741 | && (!do_utf8 |
1aa99e6b IH |
742 | || ((t = reghopmaybe3_c(s, -prog->check_offset_max, strpos)) |
743 | && t > strpos))) { | |
2c2d71f5 JH |
744 | /* Fixed substring is found far enough so that the match |
745 | cannot start at strpos. */ | |
746 | try_at_offset: | |
cad2e5aa | 747 | if (ml_anch && t[-1] != '\n') { |
30944b6d IZ |
748 | /* Eventually fbm_*() should handle this, but often |
749 | anchored_offset is not 0, so this check will not be wasted. */ | |
750 | /* XXXX In the code below we prefer to look for "^" even in | |
751 | presence of anchored substrings. And we search even | |
752 | beyond the found float position. These pessimizations | |
753 | are historical artefacts only. */ | |
754 | find_anchor: | |
2c2d71f5 | 755 | while (t < strend - prog->minlen) { |
cad2e5aa | 756 | if (*t == '\n') { |
4ee3650e | 757 | if (t < check_at - prog->check_offset_min) { |
33b8afdf | 758 | if (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) { |
4ee3650e GS |
759 | /* Since we moved from the found position, |
760 | we definitely contradict the found anchored | |
30944b6d IZ |
761 | substr. Due to the above check we do not |
762 | contradict "check" substr. | |
763 | Thus we can arrive here only if check substr | |
764 | is float. Redo checking for "other"=="fixed". | |
765 | */ | |
9041c2e3 | 766 | strpos = t + 1; |
30944b6d IZ |
767 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n", |
768 | PL_colors[0],PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset))); | |
769 | goto do_other_anchored; | |
770 | } | |
4ee3650e GS |
771 | /* We don't contradict the found floating substring. */ |
772 | /* XXXX Why not check for STCLASS? */ | |
cad2e5aa | 773 | s = t + 1; |
2c2d71f5 | 774 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n", |
30944b6d | 775 | PL_colors[0],PL_colors[1], (long)(s - i_strpos))); |
cad2e5aa JH |
776 | goto set_useful; |
777 | } | |
4ee3650e GS |
778 | /* Position contradicts check-string */ |
779 | /* XXXX probably better to look for check-string | |
780 | than for "\n", so one should lower the limit for t? */ | |
781 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n", | |
30944b6d | 782 | PL_colors[0],PL_colors[1], (long)(t + 1 - i_strpos))); |
0e41cd87 | 783 | other_last = strpos = s = t + 1; |
cad2e5aa JH |
784 | goto restart; |
785 | } | |
786 | t++; | |
787 | } | |
2c2d71f5 JH |
788 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n", |
789 | PL_colors[0],PL_colors[1])); | |
790 | goto fail_finish; | |
cad2e5aa | 791 | } |
f5952150 GS |
792 | else { |
793 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n", | |
794 | PL_colors[0],PL_colors[1])); | |
795 | } | |
cad2e5aa JH |
796 | s = t; |
797 | set_useful: | |
33b8afdf | 798 | ++BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr); /* hooray/5 */ |
cad2e5aa JH |
799 | } |
800 | else { | |
f5952150 | 801 | /* The found string does not prohibit matching at strpos, |
2c2d71f5 | 802 | - no optimization of calling REx engine can be performed, |
f5952150 GS |
803 | unless it was an MBOL and we are not after MBOL, |
804 | or a future STCLASS check will fail this. */ | |
2c2d71f5 JH |
805 | try_at_start: |
806 | /* Even in this situation we may use MBOL flag if strpos is offset | |
807 | wrt the start of the string. */ | |
05b4157f | 808 | if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */ |
a1933d95 | 809 | && (strpos != strbeg) && strpos[-1] != '\n' |
d506a20d IZ |
810 | /* May be due to an implicit anchor of m{.*foo} */ |
811 | && !(prog->reganch & ROPT_IMPLICIT)) | |
812 | { | |
cad2e5aa JH |
813 | t = strpos; |
814 | goto find_anchor; | |
815 | } | |
30944b6d | 816 | DEBUG_r( if (ml_anch) |
f5952150 GS |
817 | PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n", |
818 | (long)(strpos - i_strpos), PL_colors[0],PL_colors[1]); | |
30944b6d | 819 | ); |
2c2d71f5 | 820 | success_at_start: |
30944b6d | 821 | if (!(prog->reganch & ROPT_NAUGHTY) /* XXXX If strpos moved? */ |
33b8afdf JH |
822 | && (do_utf8 ? ( |
823 | prog->check_utf8 /* Could be deleted already */ | |
824 | && --BmUSEFUL(prog->check_utf8) < 0 | |
825 | && (prog->check_utf8 == prog->float_utf8) | |
826 | ) : ( | |
827 | prog->check_substr /* Could be deleted already */ | |
828 | && --BmUSEFUL(prog->check_substr) < 0 | |
829 | && (prog->check_substr == prog->float_substr) | |
830 | ))) | |
66e933ab | 831 | { |
cad2e5aa | 832 | /* If flags & SOMETHING - do not do it many times on the same match */ |
f5952150 | 833 | DEBUG_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n")); |
33b8afdf JH |
834 | SvREFCNT_dec(do_utf8 ? prog->check_utf8 : prog->check_substr); |
835 | if (do_utf8 ? prog->check_substr : prog->check_utf8) | |
836 | SvREFCNT_dec(do_utf8 ? prog->check_substr : prog->check_utf8); | |
837 | prog->check_substr = prog->check_utf8 = Nullsv; /* disable */ | |
838 | prog->float_substr = prog->float_utf8 = Nullsv; /* clear */ | |
5e39e1e5 | 839 | check = Nullsv; /* abort */ |
cad2e5aa | 840 | s = strpos; |
3cf5c195 IZ |
841 | /* XXXX This is a remnant of the old implementation. It |
842 | looks wasteful, since now INTUIT can use many | |
6eb5f6b9 | 843 | other heuristics. */ |
cad2e5aa JH |
844 | prog->reganch &= ~RE_USE_INTUIT; |
845 | } | |
846 | else | |
847 | s = strpos; | |
848 | } | |
849 | ||
6eb5f6b9 JH |
850 | /* Last resort... */ |
851 | /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */ | |
852 | if (prog->regstclass) { | |
853 | /* minlen == 0 is possible if regstclass is \b or \B, | |
854 | and the fixed substr is ''$. | |
855 | Since minlen is already taken into account, s+1 is before strend; | |
856 | accidentally, minlen >= 1 guaranties no false positives at s + 1 | |
857 | even for \b or \B. But (minlen? 1 : 0) below assumes that | |
858 | regstclass does not come from lookahead... */ | |
859 | /* If regstclass takes bytelength more than 1: If charlength==1, OK. | |
860 | This leaves EXACTF only, which is dealt with in find_byclass(). */ | |
c6d79d47 | 861 | const U8* const str = (U8*)STRING(prog->regstclass); |
ec6f298e | 862 | const int cl_l = (PL_regkind[(U8)OP(prog->regstclass)] == EXACT |
47a91a97 NC |
863 | ? CHR_DIST((U8 *)str+STR_LEN(prog->regstclass), |
864 | (U8 *)str) | |
66e933ab | 865 | : 1); |
8c18bf38 | 866 | const char * const endpos = (prog->anchored_substr || prog->anchored_utf8 || ml_anch) |
1aa99e6b | 867 | ? HOP3c(s, (prog->minlen ? cl_l : 0), strend) |
33b8afdf | 868 | : (prog->float_substr || prog->float_utf8 |
1aa99e6b IH |
869 | ? HOP3c(HOP3c(check_at, -start_shift, strbeg), |
870 | cl_l, strend) | |
871 | : strend); | |
6eb5f6b9 JH |
872 | |
873 | t = s; | |
975adce1 | 874 | cache_re(prog); |
ec6f298e | 875 | s = find_byclass(prog, prog->regstclass, s, endpos, 1); |
6eb5f6b9 JH |
876 | if (!s) { |
877 | #ifdef DEBUGGING | |
c05e0e2f | 878 | const char *what = 0; |
6eb5f6b9 JH |
879 | #endif |
880 | if (endpos == strend) { | |
881 | DEBUG_r( PerlIO_printf(Perl_debug_log, | |
882 | "Could not match STCLASS...\n") ); | |
883 | goto fail; | |
884 | } | |
66e933ab GS |
885 | DEBUG_r( PerlIO_printf(Perl_debug_log, |
886 | "This position contradicts STCLASS...\n") ); | |
653099ff GS |
887 | if ((prog->reganch & ROPT_ANCH) && !ml_anch) |
888 | goto fail; | |
6eb5f6b9 | 889 | /* Contradict one of substrings */ |
33b8afdf JH |
890 | if (prog->anchored_substr || prog->anchored_utf8) { |
891 | if ((do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) == check) { | |
6eb5f6b9 JH |
892 | DEBUG_r( what = "anchored" ); |
893 | hop_and_restart: | |
1aa99e6b | 894 | s = HOP3c(t, 1, strend); |
66e933ab GS |
895 | if (s + start_shift + end_shift > strend) { |
896 | /* XXXX Should be taken into account earlier? */ | |
897 | DEBUG_r( PerlIO_printf(Perl_debug_log, | |
898 | "Could not match STCLASS...\n") ); | |
899 | goto fail; | |
900 | } | |
5e39e1e5 HS |
901 | if (!check) |
902 | goto giveup; | |
6eb5f6b9 | 903 | DEBUG_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 904 | "Looking for %s substr starting at offset %ld...\n", |
6eb5f6b9 JH |
905 | what, (long)(s + start_shift - i_strpos)) ); |
906 | goto restart; | |
907 | } | |
66e933ab | 908 | /* Have both, check_string is floating */ |
6eb5f6b9 JH |
909 | if (t + start_shift >= check_at) /* Contradicts floating=check */ |
910 | goto retry_floating_check; | |
911 | /* Recheck anchored substring, but not floating... */ | |
9041c2e3 | 912 | s = check_at; |
5e39e1e5 HS |
913 | if (!check) |
914 | goto giveup; | |
6eb5f6b9 | 915 | DEBUG_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 916 | "Looking for anchored substr starting at offset %ld...\n", |
6eb5f6b9 JH |
917 | (long)(other_last - i_strpos)) ); |
918 | goto do_other_anchored; | |
919 | } | |
60e71179 GS |
920 | /* Another way we could have checked stclass at the |
921 | current position only: */ | |
922 | if (ml_anch) { | |
923 | s = t = t + 1; | |
5e39e1e5 HS |
924 | if (!check) |
925 | goto giveup; | |
60e71179 | 926 | DEBUG_r( PerlIO_printf(Perl_debug_log, |
f5952150 GS |
927 | "Looking for /%s^%s/m starting at offset %ld...\n", |
928 | PL_colors[0],PL_colors[1], (long)(t - i_strpos)) ); | |
60e71179 | 929 | goto try_at_offset; |
66e933ab | 930 | } |
33b8afdf | 931 | if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) /* Could have been deleted */ |
60e71179 | 932 | goto fail; |
6eb5f6b9 JH |
933 | /* Check is floating subtring. */ |
934 | retry_floating_check: | |
935 | t = check_at - start_shift; | |
936 | DEBUG_r( what = "floating" ); | |
937 | goto hop_and_restart; | |
938 | } | |
b7953727 JH |
939 | if (t != s) { |
940 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
6eb5f6b9 | 941 | "By STCLASS: moving %ld --> %ld\n", |
b7953727 JH |
942 | (long)(t - i_strpos), (long)(s - i_strpos)) |
943 | ); | |
944 | } | |
945 | else { | |
946 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
947 | "Does not contradict STCLASS...\n"); | |
948 | ); | |
949 | } | |
6eb5f6b9 | 950 | } |
5e39e1e5 HS |
951 | giveup: |
952 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n", | |
953 | PL_colors[4], (check ? "Guessed" : "Giving up"), | |
954 | PL_colors[5], (long)(s - i_strpos)) ); | |
cad2e5aa | 955 | return s; |
2c2d71f5 JH |
956 | |
957 | fail_finish: /* Substring not found */ | |
33b8afdf JH |
958 | if (prog->check_substr || prog->check_utf8) /* could be removed already */ |
959 | BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr) += 5; /* hooray */ | |
cad2e5aa | 960 | fail: |
2c2d71f5 | 961 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n", |
cad2e5aa JH |
962 | PL_colors[4],PL_colors[5])); |
963 | return Nullch; | |
964 | } | |
9661b544 | 965 | |
6eb5f6b9 | 966 | /* We know what class REx starts with. Try to find this position... */ |
3c3eec57 | 967 | STATIC char * |
8c18bf38 | 968 | S_find_byclass(pTHX_ regexp * prog, regnode *c, char *s, const char *strend, I32 norun) |
a687059c | 969 | { |
228fe6e6 | 970 | const I32 doevery = (prog->reganch & ROPT_SKIP) == 0; |
6eb5f6b9 | 971 | char *m; |
d8093b23 | 972 | STRLEN ln; |
bcefe257 | 973 | STRLEN lnc; |
45bfbaf1 | 974 | register STRLEN uskip; |
d8093b23 G |
975 | unsigned int c1; |
976 | unsigned int c2; | |
6eb5f6b9 JH |
977 | char *e; |
978 | register I32 tmp = 1; /* Scratch variable? */ | |
8c18bf38 | 979 | register const bool do_utf8 = PL_reg_match_utf8; |
cad2e5aa | 980 | |
6eb5f6b9 JH |
981 | /* We know what class it must start with. */ |
982 | switch (OP(c)) { | |
6eb5f6b9 | 983 | case ANYOF: |
d46a7032 | 984 | if (do_utf8) { |
45bfbaf1 | 985 | while (s + (uskip = UTF8SKIP(s)) <= strend) { |
d46a7032 JH |
986 | if ((ANYOF_FLAGS(c) & ANYOF_UNICODE) || |
987 | !UTF8_IS_INVARIANT((U8)s[0]) ? | |
988 | reginclass(c, (U8*)s, 0, do_utf8) : | |
989 | REGINCLASS(c, (U8*)s)) { | |
990 | if (tmp && (norun || regtry(prog, s))) | |
991 | goto got_it; | |
992 | else | |
993 | tmp = doevery; | |
994 | } | |
995 | else | |
996 | tmp = 1; | |
45bfbaf1 | 997 | s += uskip; |
d46a7032 JH |
998 | } |
999 | } | |
1000 | else { | |
1001 | while (s < strend) { | |
1002 | STRLEN skip = 1; | |
1003 | ||
1004 | if (REGINCLASS(c, (U8*)s) || | |
1005 | (ANYOF_FOLD_SHARP_S(c, s, strend) && | |
1006 | /* The assignment of 2 is intentional: | |
1007 | * for the folded sharp s, the skip is 2. */ | |
1008 | (skip = SHARP_S_SKIP))) { | |
1009 | if (tmp && (norun || regtry(prog, s))) | |
1010 | goto got_it; | |
1011 | else | |
1012 | tmp = doevery; | |
1013 | } | |
1014 | else | |
1015 | tmp = 1; | |
1016 | s += skip; | |
1017 | } | |
a0d0e21e | 1018 | } |
6eb5f6b9 | 1019 | break; |
f33976b4 DB |
1020 | case CANY: |
1021 | while (s < strend) { | |
1022 | if (tmp && (norun || regtry(prog, s))) | |
1023 | goto got_it; | |
1024 | else | |
1025 | tmp = doevery; | |
1026 | s++; | |
1027 | } | |
1028 | break; | |
6eb5f6b9 | 1029 | case EXACTF: |
bcefe257 NIS |
1030 | m = STRING(c); |
1031 | ln = STR_LEN(c); /* length to match in octets/bytes */ | |
1032 | lnc = (I32) ln; /* length to match in characters */ | |
1aa99e6b | 1033 | if (UTF) { |
a2a2844f | 1034 | STRLEN ulen1, ulen2; |
bcefe257 | 1035 | U8 *sm = (U8 *) m; |
a2a469f9 JH |
1036 | U8 tmpbuf1[UTF8_MAXBYTES_CASE+1]; |
1037 | U8 tmpbuf2[UTF8_MAXBYTES_CASE+1]; | |
a2a2844f JH |
1038 | |
1039 | to_utf8_lower((U8*)m, tmpbuf1, &ulen1); | |
1040 | to_utf8_upper((U8*)m, tmpbuf2, &ulen2); | |
1041 | ||
a2a469f9 | 1042 | c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXBYTES_CASE, |
872c91ae | 1043 | 0, ckWARN(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY); |
a2a469f9 | 1044 | c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXBYTES_CASE, |
872c91ae | 1045 | 0, ckWARN(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY); |
bcefe257 NIS |
1046 | lnc = 0; |
1047 | while (sm < ((U8 *) m + ln)) { | |
1048 | lnc++; | |
1049 | sm += UTF8SKIP(sm); | |
1050 | } | |
1aa99e6b IH |
1051 | } |
1052 | else { | |
1053 | c1 = *(U8*)m; | |
1054 | c2 = PL_fold[c1]; | |
1055 | } | |
6eb5f6b9 JH |
1056 | goto do_exactf; |
1057 | case EXACTFL: | |
bcefe257 NIS |
1058 | m = STRING(c); |
1059 | ln = STR_LEN(c); | |
1060 | lnc = (I32) ln; | |
d8093b23 | 1061 | c1 = *(U8*)m; |
6eb5f6b9 JH |
1062 | c2 = PL_fold_locale[c1]; |
1063 | do_exactf: | |
dc904a75 | 1064 | e = HOP3c(strend, -((I32)lnc), s); |
b3c9acc1 | 1065 | |
6eb5f6b9 JH |
1066 | if (norun && e < s) |
1067 | e = s; /* Due to minlen logic of intuit() */ | |
1aa99e6b | 1068 | |
60a8b682 JH |
1069 | /* The idea in the EXACTF* cases is to first find the |
1070 | * first character of the EXACTF* node and then, if | |
1071 | * necessary, case-insensitively compare the full | |
1072 | * text of the node. The c1 and c2 are the first | |
1073 | * characters (though in Unicode it gets a bit | |
1074 | * more complicated because there are more cases | |
7f16dd3d JH |
1075 | * than just upper and lower: one needs to use |
1076 | * the so-called folding case for case-insensitive | |
1077 | * matching (called "loose matching" in Unicode). | |
1078 | * ibcmp_utf8() will do just that. */ | |
60a8b682 | 1079 | |
1aa99e6b | 1080 | if (do_utf8) { |
575cac57 | 1081 | UV c, f; |
a2a469f9 | 1082 | U8 tmpbuf [UTF8_MAXBYTES+1]; |
575cac57 | 1083 | STRLEN len, foldlen; |
d7f013c8 | 1084 | |
09091399 | 1085 | if (c1 == c2) { |
bcefe257 NIS |
1086 | /* Upper and lower of 1st char are equal - |
1087 | * probably not a "letter". */ | |
1aa99e6b | 1088 | while (s <= e) { |
a2a469f9 | 1089 | c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len, |
872c91ae JH |
1090 | ckWARN(WARN_UTF8) ? |
1091 | 0 : UTF8_ALLOW_ANY); | |
80aecb99 JH |
1092 | if ( c == c1 |
1093 | && (ln == len || | |
66423254 | 1094 | ibcmp_utf8(s, (char **)0, 0, do_utf8, |
eb160463 | 1095 | m, (char **)0, ln, (bool)UTF)) |
55da9344 | 1096 | && (norun || regtry(prog, s)) ) |
1aa99e6b | 1097 | goto got_it; |
80aecb99 | 1098 | else { |
228fe6e6 | 1099 | U8 foldbuf[UTF8_MAXBYTES_CASE+1]; |
80aecb99 | 1100 | uvchr_to_utf8(tmpbuf, c); |
ac7e0132 | 1101 | f = to_utf8_fold(tmpbuf, foldbuf, &foldlen); |
80aecb99 JH |
1102 | if ( f != c |
1103 | && (f == c1 || f == c2) | |
1104 | && (ln == foldlen || | |
66423254 JH |
1105 | !ibcmp_utf8((char *) foldbuf, |
1106 | (char **)0, foldlen, do_utf8, | |
d07ddd77 | 1107 | m, |
eb160463 | 1108 | (char **)0, ln, (bool)UTF)) |
80aecb99 JH |
1109 | && (norun || regtry(prog, s)) ) |
1110 | goto got_it; | |
1111 | } | |
1aa99e6b IH |
1112 | s += len; |
1113 | } | |
09091399 JH |
1114 | } |
1115 | else { | |
1aa99e6b | 1116 | while (s <= e) { |
a2a469f9 | 1117 | c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len, |
872c91ae JH |
1118 | ckWARN(WARN_UTF8) ? |
1119 | 0 : UTF8_ALLOW_ANY); | |
80aecb99 | 1120 | |
60a8b682 | 1121 | /* Handle some of the three Greek sigmas cases. |
8c01da3c JH |
1122 | * Note that not all the possible combinations |
1123 | * are handled here: some of them are handled | |
1124 | * by the standard folding rules, and some of | |
1125 | * them (the character class or ANYOF cases) | |
1126 | * are handled during compiletime in | |
1127 | * regexec.c:S_regclass(). */ | |
880bd946 JH |
1128 | if (c == (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA || |
1129 | c == (UV)UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) | |
1130 | c = (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA; | |
80aecb99 JH |
1131 | |
1132 | if ( (c == c1 || c == c2) | |
1133 | && (ln == len || | |
66423254 | 1134 | ibcmp_utf8(s, (char **)0, 0, do_utf8, |
eb160463 | 1135 | m, (char **)0, ln, (bool)UTF)) |
55da9344 | 1136 | && (norun || regtry(prog, s)) ) |
1aa99e6b | 1137 | goto got_it; |
80aecb99 | 1138 | else { |
228fe6e6 | 1139 | U8 foldbuf[UTF8_MAXBYTES_CASE+1]; |
80aecb99 | 1140 | uvchr_to_utf8(tmpbuf, c); |
ac7e0132 | 1141 | f = to_utf8_fold(tmpbuf, foldbuf, &foldlen); |
80aecb99 JH |
1142 | if ( f != c |
1143 | && (f == c1 || f == c2) | |
1144 | && (ln == foldlen || | |
a6872d42 | 1145 | !ibcmp_utf8((char *) foldbuf, |
66423254 | 1146 | (char **)0, foldlen, do_utf8, |
d07ddd77 | 1147 | m, |
eb160463 | 1148 | (char **)0, ln, (bool)UTF)) |
80aecb99 JH |
1149 | && (norun || regtry(prog, s)) ) |
1150 | goto got_it; | |
1151 | } | |
1aa99e6b IH |
1152 | s += len; |
1153 | } | |
09091399 | 1154 | } |
1aa99e6b IH |
1155 | } |
1156 | else { | |
1157 | if (c1 == c2) | |
1158 | while (s <= e) { | |
1159 | if ( *(U8*)s == c1 | |
1160 | && (ln == 1 || !(OP(c) == EXACTF | |
1161 | ? ibcmp(s, m, ln) | |
1162 | : ibcmp_locale(s, m, ln))) | |
1163 | && (norun || regtry(prog, s)) ) | |
1164 | goto got_it; | |
1165 | s++; | |
1166 | } | |
1167 | else | |
1168 | while (s <= e) { | |
1169 | if ( (*(U8*)s == c1 || *(U8*)s == c2) | |
1170 | && (ln == 1 || !(OP(c) == EXACTF | |
1171 | ? ibcmp(s, m, ln) | |
1172 | : ibcmp_locale(s, m, ln))) | |
1173 | && (norun || regtry(prog, s)) ) | |
1174 | goto got_it; | |
1175 | s++; | |
1176 | } | |
b3c9acc1 IZ |
1177 | } |
1178 | break; | |
bbce6d69 | 1179 | case BOUNDL: |
3280af22 | 1180 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 1181 | /* FALL THROUGH */ |
a0d0e21e | 1182 | case BOUND: |
ffc61ed2 | 1183 | if (do_utf8) { |
12d33761 | 1184 | if (s == PL_bostr) |
ffc61ed2 JH |
1185 | tmp = '\n'; |
1186 | else { | |
b4f7163a | 1187 | U8 *r = reghop3((U8*)s, -1, (U8*)PL_bostr); |
9041c2e3 | 1188 | |
b4f7163a | 1189 | tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, 0); |
ffc61ed2 JH |
1190 | } |
1191 | tmp = ((OP(c) == BOUND ? | |
9041c2e3 | 1192 | isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0); |
fab1f349 | 1193 | LOAD_UTF8_CHARCLASS_ALNUM(); |
45bfbaf1 | 1194 | while (s + (uskip = UTF8SKIP(s)) <= strend) { |
ffc61ed2 | 1195 | if (tmp == !(OP(c) == BOUND ? |
3568d838 | 1196 | swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) : |
ffc61ed2 JH |
1197 | isALNUM_LC_utf8((U8*)s))) |
1198 | { | |
1199 | tmp = !tmp; | |
1200 | if ((norun || regtry(prog, s))) | |
1201 | goto got_it; | |
1202 | } | |
45bfbaf1 | 1203 | s += uskip; |
a687059c | 1204 | } |
a0d0e21e | 1205 | } |
667bb95a | 1206 | else { |
12d33761 | 1207 | tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n'; |
ffc61ed2 JH |
1208 | tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0); |
1209 | while (s < strend) { | |
1210 | if (tmp == | |
1211 | !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) { | |
1212 | tmp = !tmp; | |
1213 | if ((norun || regtry(prog, s))) | |
1214 | goto got_it; | |
1215 | } | |
1216 | s++; | |
a0ed51b3 | 1217 | } |
a0ed51b3 | 1218 | } |
6eb5f6b9 | 1219 | if ((!prog->minlen && tmp) && (norun || regtry(prog, s))) |
a0ed51b3 LW |
1220 | goto got_it; |
1221 | break; | |
bbce6d69 | 1222 | case NBOUNDL: |
3280af22 | 1223 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 1224 | /* FALL THROUGH */ |
a0d0e21e | 1225 | case NBOUND: |
ffc61ed2 | 1226 | if (do_utf8) { |
12d33761 | 1227 | if (s == PL_bostr) |
ffc61ed2 JH |
1228 | tmp = '\n'; |
1229 | else { | |
b4f7163a | 1230 | U8 *r = reghop3((U8*)s, -1, (U8*)PL_bostr); |
9041c2e3 | 1231 | |
b4f7163a | 1232 | tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, 0); |
ffc61ed2 JH |
1233 | } |
1234 | tmp = ((OP(c) == NBOUND ? | |
9041c2e3 | 1235 | isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0); |
fab1f349 | 1236 | LOAD_UTF8_CHARCLASS_ALNUM(); |
45bfbaf1 | 1237 | while (s + (uskip = UTF8SKIP(s)) <= strend) { |
ffc61ed2 | 1238 | if (tmp == !(OP(c) == NBOUND ? |
3568d838 | 1239 | swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) : |
ffc61ed2 JH |
1240 | isALNUM_LC_utf8((U8*)s))) |
1241 | tmp = !tmp; | |
1242 | else if ((norun || regtry(prog, s))) | |
1243 | goto got_it; | |
45bfbaf1 | 1244 | s += uskip; |
ffc61ed2 | 1245 | } |
a0d0e21e | 1246 | } |
667bb95a | 1247 | else { |
12d33761 | 1248 | tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n'; |
ffc61ed2 JH |
1249 | tmp = ((OP(c) == NBOUND ? |
1250 | isALNUM(tmp) : isALNUM_LC(tmp)) != 0); | |
1251 | while (s < strend) { | |
1252 | if (tmp == | |
1253 | !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s))) | |
1254 | tmp = !tmp; | |
1255 | else if ((norun || regtry(prog, s))) | |
1256 | goto got_it; | |
1257 | s++; | |
1258 | } | |
a0ed51b3 | 1259 | } |
6eb5f6b9 | 1260 | if ((!prog->minlen && !tmp) && (norun || regtry(prog, s))) |
a0ed51b3 LW |
1261 | goto got_it; |
1262 | break; | |
a0d0e21e | 1263 | case ALNUM: |
ffc61ed2 | 1264 | if (do_utf8) { |
fab1f349 | 1265 | LOAD_UTF8_CHARCLASS_ALNUM(); |
45bfbaf1 | 1266 | while (s + (uskip = UTF8SKIP(s)) <= strend) { |
3568d838 | 1267 | if (swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8)) { |
ffc61ed2 JH |
1268 | if (tmp && (norun || regtry(prog, s))) |
1269 | goto got_it; | |
1270 | else | |
1271 | tmp = doevery; | |
1272 | } | |
bbce6d69 | 1273 | else |
ffc61ed2 | 1274 | tmp = 1; |
45bfbaf1 | 1275 | s += uskip; |
bbce6d69 | 1276 | } |
bbce6d69 | 1277 | } |
ffc61ed2 JH |
1278 | else { |
1279 | while (s < strend) { | |
1280 | if (isALNUM(*s)) { | |
1281 | if (tmp && (norun || regtry(prog, s))) | |
1282 | goto got_it; | |
1283 | else | |
1284 | tmp = doevery; | |
1285 | } | |
a0ed51b3 | 1286 | else |
ffc61ed2 JH |
1287 | tmp = 1; |
1288 | s++; | |
a0ed51b3 | 1289 | } |
a0ed51b3 LW |
1290 | } |
1291 | break; | |
bbce6d69 | 1292 | case ALNUML: |
3280af22 | 1293 | PL_reg_flags |= RF_tainted; |
ffc61ed2 | 1294 | if (do_utf8) { |
45bfbaf1 | 1295 | while (s + (uskip = UTF8SKIP(s)) <= strend) { |
ffc61ed2 JH |
1296 | if (isALNUM_LC_utf8((U8*)s)) { |
1297 | if (tmp && (norun || regtry(prog, s))) | |
1298 | goto got_it; | |
1299 | else | |
1300 | tmp = doevery; | |
1301 | } | |
a687059c | 1302 | else |
ffc61ed2 | 1303 | tmp = 1; |
45bfbaf1 | 1304 | s += uskip; |
a0d0e21e | 1305 | } |
a0d0e21e | 1306 | } |
ffc61ed2 JH |
1307 | else { |
1308 | while (s < strend) { | |
1309 | if (isALNUM_LC(*s)) { | |
1310 | if (tmp && (norun || regtry(prog, s))) | |
1311 | goto got_it; | |
1312 | else | |
1313 | tmp = doevery; | |
1314 | } | |
a0ed51b3 | 1315 | else |
ffc61ed2 JH |
1316 | tmp = 1; |
1317 | s++; | |
a0ed51b3 | 1318 | } |
a0ed51b3 LW |
1319 | } |
1320 | break; | |
a0d0e21e | 1321 | case NALNUM: |
ffc61ed2 | 1322 | if (do_utf8) { |
fab1f349 | 1323 | LOAD_UTF8_CHARCLASS_ALNUM(); |
45bfbaf1 | 1324 | while (s + (uskip = UTF8SKIP(s)) <= strend) { |
3568d838 | 1325 | if (!swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8)) { |
ffc61ed2 JH |
1326 | if (tmp && (norun || regtry(prog, s))) |
1327 | goto got_it; | |
1328 | else | |
1329 | tmp = doevery; | |
1330 | } | |
bbce6d69 | 1331 | else |
ffc61ed2 | 1332 | tmp = 1; |
45bfbaf1 | 1333 | s += uskip; |
bbce6d69 | 1334 | } |
bbce6d69 | 1335 | } |
ffc61ed2 JH |
1336 | else { |
1337 | while (s < strend) { | |
1338 | if (!isALNUM(*s)) { | |
1339 | if (tmp && (norun || regtry(prog, s))) | |
1340 | goto got_it; | |
1341 | else | |
1342 | tmp = doevery; | |
1343 | } | |
a0ed51b3 | 1344 | else |
ffc61ed2 JH |
1345 | tmp = 1; |
1346 | s++; | |
a0ed51b3 | 1347 | } |
a0ed51b3 LW |
1348 | } |
1349 | break; | |
bbce6d69 | 1350 | case NALNUML: |
3280af22 | 1351 | PL_reg_flags |= RF_tainted; |
ffc61ed2 | 1352 | if (do_utf8) { |
45bfbaf1 | 1353 | while (s + (uskip = UTF8SKIP(s)) <= strend) { |
ffc61ed2 JH |
1354 | if (!isALNUM_LC_utf8((U8*)s)) { |
1355 | if (tmp && (norun || regtry(prog, s))) | |
1356 | goto got_it; | |
1357 | else | |
1358 | tmp = doevery; | |
1359 | } | |
a687059c | 1360 | else |
ffc61ed2 | 1361 | tmp = 1; |
45bfbaf1 | 1362 | s += uskip; |
a687059c | 1363 | } |
a0d0e21e | 1364 | } |
ffc61ed2 JH |
1365 | else { |
1366 | while (s < strend) { | |
1367 | if (!isALNUM_LC(*s)) { | |
1368 | if (tmp && (norun || regtry(prog, s))) | |
1369 | goto got_it; | |
1370 | else | |
1371 | tmp = doevery; | |
1372 | } | |
a0ed51b3 | 1373 | else |
ffc61ed2 JH |
1374 | tmp = 1; |
1375 | s++; | |
a0ed51b3 | 1376 | } |
a0ed51b3 LW |
1377 | } |
1378 | break; | |
a0d0e21e | 1379 | case SPACE: |
ffc61ed2 | 1380 | if (do_utf8) { |
fab1f349 | 1381 | LOAD_UTF8_CHARCLASS_SPACE(); |
45bfbaf1 | 1382 | while (s + (uskip = UTF8SKIP(s)) <= strend) { |
3568d838 | 1383 | if (*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s, do_utf8)) { |
ffc61ed2 JH |
1384 | if (tmp && (norun || regtry(prog, s))) |
1385 | goto got_it; | |
1386 | else | |
1387 | tmp = doevery; | |
1388 | } | |
a0d0e21e | 1389 | else |
ffc61ed2 | 1390 | tmp = 1; |
45bfbaf1 | 1391 | s += uskip; |
2304df62 | 1392 | } |
a0d0e21e | 1393 | } |
ffc61ed2 JH |
1394 | else { |
1395 | while (s < strend) { | |
1396 | if (isSPACE(*s)) { | |
1397 | if (tmp && (norun || regtry(prog, s))) | |
1398 | goto got_it; | |
1399 | else | |
1400 | tmp = doevery; | |
1401 | } | |
a0ed51b3 | 1402 | else |
ffc61ed2 JH |
1403 | tmp = 1; |
1404 | s++; | |
a0ed51b3 | 1405 | } |
a0ed51b3 LW |
1406 | } |
1407 | break; | |
bbce6d69 | 1408 | case SPACEL: |
3280af22 | 1409 | PL_reg_flags |= RF_tainted; |
ffc61ed2 | 1410 | if (do_utf8) { |
45bfbaf1 | 1411 | while (s + (uskip = UTF8SKIP(s)) <= strend) { |
ffc61ed2 JH |
1412 | if (*s == ' ' || isSPACE_LC_utf8((U8*)s)) { |
1413 | if (tmp && (norun || regtry(prog, s))) | |
1414 | goto got_it; | |
1415 | else | |
1416 | tmp = doevery; | |
1417 | } | |
bbce6d69 | 1418 | else |
ffc61ed2 | 1419 | tmp = 1; |
45bfbaf1 | 1420 | s += uskip; |
bbce6d69 | 1421 | } |
bbce6d69 | 1422 | } |
ffc61ed2 JH |
1423 | else { |
1424 | while (s < strend) { | |
1425 | if (isSPACE_LC(*s)) { | |
1426 | if (tmp && (norun || regtry(prog, s))) | |
1427 | goto got_it; | |
1428 | else | |
1429 | tmp = doevery; | |
1430 | } | |
a0ed51b3 | 1431 | else |
ffc61ed2 JH |
1432 | tmp = 1; |
1433 | s++; | |
a0ed51b3 | 1434 | } |
a0ed51b3 LW |
1435 | } |
1436 | break; | |
a0d0e21e | 1437 | case NSPACE: |
ffc61ed2 | 1438 | if (do_utf8) { |
fab1f349 | 1439 | LOAD_UTF8_CHARCLASS_SPACE(); |
45bfbaf1 | 1440 | while (s + (uskip = UTF8SKIP(s)) <= strend) { |
3568d838 | 1441 | if (!(*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s, do_utf8))) { |
ffc61ed2 JH |
1442 | if (tmp && (norun || regtry(prog, s))) |
1443 | goto got_it; | |
1444 | else | |
1445 | tmp = doevery; | |
1446 | } | |
a0d0e21e | 1447 | else |
ffc61ed2 | 1448 | tmp = 1; |
45bfbaf1 | 1449 | s += uskip; |
a687059c | 1450 | } |
a0d0e21e | 1451 | } |
ffc61ed2 JH |
1452 | else { |
1453 | while (s < strend) { | |
1454 | if (!isSPACE(*s)) { | |
1455 | if (tmp && (norun || regtry(prog, s))) | |
1456 | goto got_it; | |
1457 | else | |
1458 | tmp = doevery; | |
1459 | } | |
a0ed51b3 | 1460 | else |
ffc61ed2 JH |
1461 | tmp = 1; |
1462 | s++; | |
a0ed51b3 | 1463 | } |
a0ed51b3 LW |
1464 | } |
1465 | break; | |
bbce6d69 | 1466 | case NSPACEL: |
3280af22 | 1467 | PL_reg_flags |= RF_tainted; |
ffc61ed2 | 1468 | if (do_utf8) { |
45bfbaf1 | 1469 | while (s + (uskip = UTF8SKIP(s)) <= strend) { |
ffc61ed2 JH |
1470 | if (!(*s == ' ' || isSPACE_LC_utf8((U8*)s))) { |
1471 | if (tmp && (norun || regtry(prog, s))) | |
1472 | goto got_it; | |
1473 | else | |
1474 | tmp = doevery; | |
1475 | } | |
bbce6d69 | 1476 | else |
ffc61ed2 | 1477 | tmp = 1; |
45bfbaf1 | 1478 | s += uskip; |
bbce6d69 | 1479 | } |
bbce6d69 | 1480 | } |
ffc61ed2 JH |
1481 | else { |
1482 | while (s < strend) { | |
1483 | if (!isSPACE_LC(*s)) { | |
1484 | if (tmp && (norun || regtry(prog, s))) | |
1485 | goto got_it; | |
1486 | else | |
1487 | tmp = doevery; | |
1488 | } | |
a0ed51b3 | 1489 | else |
ffc61ed2 JH |
1490 | tmp = 1; |
1491 | s++; | |
a0ed51b3 | 1492 | } |
a0ed51b3 LW |
1493 | } |
1494 | break; | |
a0d0e21e | 1495 | case DIGIT: |
ffc61ed2 | 1496 | if (do_utf8) { |
fab1f349 | 1497 | LOAD_UTF8_CHARCLASS_DIGIT(); |
45bfbaf1 | 1498 | while (s + (uskip = UTF8SKIP(s)) <= strend) { |
3568d838 | 1499 | if (swash_fetch(PL_utf8_digit,(U8*)s, do_utf8)) { |
ffc61ed2 JH |
1500 | if (tmp && (norun || regtry(prog, s))) |
1501 | goto got_it; | |
1502 | else | |
1503 | tmp = doevery; | |
1504 | } | |
a0d0e21e | 1505 | else |
ffc61ed2 | 1506 | tmp = 1; |
45bfbaf1 | 1507 | s += uskip; |
2b69d0c2 | 1508 | } |
a0d0e21e | 1509 | } |
ffc61ed2 JH |
1510 | else { |
1511 | while (s < strend) { | |
1512 | if (isDIGIT(*s)) { | |
1513 | if (tmp && (norun || regtry(prog, s))) | |
1514 | goto got_it; | |
1515 | else | |
1516 | tmp = doevery; | |
1517 | } | |
a0ed51b3 | 1518 | else |
ffc61ed2 JH |
1519 | tmp = 1; |
1520 | s++; | |
a0ed51b3 | 1521 | } |
a0ed51b3 LW |
1522 | } |
1523 | break; | |
b8c5462f JH |
1524 | case DIGITL: |
1525 | PL_reg_flags |= RF_tainted; | |
ffc61ed2 | 1526 | if (do_utf8) { |
45bfbaf1 | 1527 | while (s + (uskip = UTF8SKIP(s)) <= strend) { |
ffc61ed2 JH |
1528 | if (isDIGIT_LC_utf8((U8*)s)) { |
1529 | if (tmp && (norun || regtry(prog, s))) | |
1530 | goto got_it; | |
1531 | else | |
1532 | tmp = doevery; | |
1533 | } | |
b8c5462f | 1534 | else |
ffc61ed2 | 1535 | tmp = 1; |
45bfbaf1 | 1536 | s += uskip; |
b8c5462f | 1537 | } |
b8c5462f | 1538 | } |
ffc61ed2 JH |
1539 | else { |
1540 | while (s < strend) { | |
1541 | if (isDIGIT_LC(*s)) { | |
1542 | if (tmp && (norun || regtry(prog, s))) | |
1543 | goto got_it; | |
1544 | else | |
1545 | tmp = doevery; | |
1546 | } | |
b8c5462f | 1547 | else |
ffc61ed2 JH |
1548 | tmp = 1; |
1549 | s++; | |
b8c5462f | 1550 | } |
b8c5462f JH |
1551 | } |
1552 | break; | |
a0d0e21e | 1553 | case NDIGIT: |
ffc61ed2 | 1554 | if (do_utf8) { |
fab1f349 | 1555 | LOAD_UTF8_CHARCLASS_DIGIT(); |
45bfbaf1 | 1556 | while (s + (uskip = UTF8SKIP(s)) <= strend) { |
3568d838 | 1557 | if (!swash_fetch(PL_utf8_digit,(U8*)s, do_utf8)) { |
ffc61ed2 JH |
1558 | if (tmp && (norun || regtry(prog, s))) |
1559 | goto got_it; | |
1560 | else | |
1561 | tmp = doevery; | |
1562 | } | |
a0d0e21e | 1563 | else |
ffc61ed2 | 1564 | tmp = 1; |
45bfbaf1 | 1565 | s += uskip; |
a687059c | 1566 | } |
a0d0e21e | 1567 | } |
ffc61ed2 JH |
1568 | else { |
1569 | while (s < strend) { | |
1570 | if (!isDIGIT(*s)) { | |
1571 | if (tmp && (norun || regtry(prog, s))) | |
1572 | goto got_it; | |
1573 | else | |
1574 | tmp = doevery; | |
1575 | } | |
a0ed51b3 | 1576 | else |
ffc61ed2 JH |
1577 | tmp = 1; |
1578 | s++; | |
a0ed51b3 | 1579 | } |
a0ed51b3 LW |
1580 | } |
1581 | break; | |
b8c5462f JH |
1582 | case NDIGITL: |
1583 | PL_reg_flags |= RF_tainted; | |
ffc61ed2 | 1584 | if (do_utf8) { |
45bfbaf1 | 1585 | while (s + (uskip = UTF8SKIP(s)) <= strend) { |
ffc61ed2 JH |
1586 | if (!isDIGIT_LC_utf8((U8*)s)) { |
1587 | if (tmp && (norun || regtry(prog, s))) | |
1588 | goto got_it; | |
1589 | else | |
1590 | tmp = doevery; | |
1591 | } | |
b8c5462f | 1592 | else |
ffc61ed2 | 1593 | tmp = 1; |
45bfbaf1 | 1594 | s += uskip; |
b8c5462f | 1595 | } |
a0ed51b3 | 1596 | } |
ffc61ed2 JH |
1597 | else { |
1598 | while (s < strend) { | |
1599 | if (!isDIGIT_LC(*s)) { | |
1600 | if (tmp && (norun || regtry(prog, s))) | |
1601 | goto got_it; | |
1602 | else | |
1603 | tmp = doevery; | |
1604 | } | |
cf93c79d | 1605 | else |
ffc61ed2 JH |
1606 | tmp = 1; |
1607 | s++; | |
b8c5462f | 1608 | } |
b8c5462f JH |
1609 | } |
1610 | break; | |
b3c9acc1 | 1611 | default: |
3c3eec57 GS |
1612 | Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c)); |
1613 | break; | |
d6a28714 | 1614 | } |
6eb5f6b9 JH |
1615 | return 0; |
1616 | got_it: | |
1617 | return s; | |
1618 | } | |
1619 | ||
1620 | /* | |
1621 | - regexec_flags - match a regexp against a string | |
1622 | */ | |
1623 | I32 | |
1624 | Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char *strend, | |
1625 | char *strbeg, I32 minend, SV *sv, void *data, U32 flags) | |
1626 | /* strend: pointer to null at end of string */ | |
1627 | /* strbeg: real beginning of string */ | |
1628 | /* minend: end of match must be >=minend after stringarg. */ | |
1629 | /* data: May be used for some additional optimizations. */ | |
1630 | /* nosave: For optimizations. */ | |
1631 | { | |
6eb5f6b9 JH |
1632 | register char *s; |
1633 | register regnode *c; | |
1634 | register char *startpos = stringarg; | |
6eb5f6b9 JH |
1635 | I32 minlen; /* must match at least this many chars */ |
1636 | I32 dontbother = 0; /* how many characters not to try at end */ | |
6eb5f6b9 JH |
1637 | I32 end_shift = 0; /* Same for the end. */ /* CC */ |
1638 | I32 scream_pos = -1; /* Internal iterator of scream. */ | |
1639 | char *scream_olds; | |
1640 | SV* oreplsv = GvSV(PL_replgv); | |
228fe6e6 | 1641 | const bool do_utf8 = DO_UTF8(sv); |
2a782b5b | 1642 | #ifdef DEBUGGING |
9e55ce06 JH |
1643 | SV *dsv0 = PERL_DEBUG_PAD_ZERO(0); |
1644 | SV *dsv1 = PERL_DEBUG_PAD_ZERO(1); | |
2a782b5b | 1645 | #endif |
a2592645 | 1646 | PERL_UNUSED_ARG(data); |
2ea5368e | 1647 | RX_MATCH_UTF8_set(prog,do_utf8); |
6eb5f6b9 JH |
1648 | |
1649 | PL_regcc = 0; | |
1650 | ||
1651 | cache_re(prog); | |
1652 | #ifdef DEBUGGING | |
aea4f609 | 1653 | PL_regnarrate = DEBUG_r_TEST; |
6eb5f6b9 JH |
1654 | #endif |
1655 | ||
1656 | /* Be paranoid... */ | |
1657 | if (prog == NULL || startpos == NULL) { | |
1658 | Perl_croak(aTHX_ "NULL regexp parameter"); | |
1659 | return 0; | |
1660 | } | |
1661 | ||
1662 | minlen = prog->minlen; | |
61a36c01 | 1663 | if (strend - startpos < minlen) { |
a72c7584 JH |
1664 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
1665 | "String too short [regexec_flags]...\n")); | |
1666 | goto phooey; | |
1aa99e6b | 1667 | } |
6eb5f6b9 | 1668 | |
6eb5f6b9 JH |
1669 | /* Check validity of program. */ |
1670 | if (UCHARAT(prog->program) != REG_MAGIC) { | |
1671 | Perl_croak(aTHX_ "corrupted regexp program"); | |
1672 | } | |
1673 | ||
1674 | PL_reg_flags = 0; | |
1675 | PL_reg_eval_set = 0; | |
1676 | PL_reg_maxiter = 0; | |
1677 | ||
1678 | if (prog->reganch & ROPT_UTF8) | |
1679 | PL_reg_flags |= RF_utf8; | |
1680 | ||
1681 | /* Mark beginning of line for ^ and lookbehind. */ | |
1682 | PL_regbol = startpos; | |
1683 | PL_bostr = strbeg; | |
1684 | PL_reg_sv = sv; | |
1685 | ||
1686 | /* Mark end of line for $ (and such) */ | |
1687 | PL_regeol = strend; | |
1688 | ||
1689 | /* see how far we have to get to not match where we matched before */ | |
1690 | PL_regtill = startpos+minend; | |
1691 | ||
1692 | /* We start without call_cc context. */ | |
1693 | PL_reg_call_cc = 0; | |
1694 | ||
1695 | /* If there is a "must appear" string, look for it. */ | |
1696 | s = startpos; | |
1697 | ||
1698 | if (prog->reganch & ROPT_GPOS_SEEN) { /* Need to have PL_reg_ganch */ | |
1699 | MAGIC *mg; | |
1700 | ||
1701 | if (flags & REXEC_IGNOREPOS) /* Means: check only at start */ | |
1702 | PL_reg_ganch = startpos; | |
1703 | else if (sv && SvTYPE(sv) >= SVt_PVMG | |
1704 | && SvMAGIC(sv) | |
14befaf4 DM |
1705 | && (mg = mg_find(sv, PERL_MAGIC_regex_global)) |
1706 | && mg->mg_len >= 0) { | |
6eb5f6b9 JH |
1707 | PL_reg_ganch = strbeg + mg->mg_len; /* Defined pos() */ |
1708 | if (prog->reganch & ROPT_ANCH_GPOS) { | |
f33976b4 | 1709 | if (s > PL_reg_ganch) |
6eb5f6b9 JH |
1710 | goto phooey; |
1711 | s = PL_reg_ganch; | |
1712 | } | |
1713 | } | |
1714 | else /* pos() not defined */ | |
1715 | PL_reg_ganch = strbeg; | |
1716 | } | |
1717 | ||
33b8afdf | 1718 | if (!(flags & REXEC_CHECKED) && (prog->check_substr != Nullsv || prog->check_utf8 != Nullsv)) { |
6eb5f6b9 JH |
1719 | re_scream_pos_data d; |
1720 | ||
1721 | d.scream_olds = &scream_olds; | |
1722 | d.scream_pos = &scream_pos; | |
1723 | s = re_intuit_start(prog, sv, s, strend, flags, &d); | |
3fa9c3d7 JH |
1724 | if (!s) { |
1725 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Not present...\n")); | |
6eb5f6b9 | 1726 | goto phooey; /* not present */ |
3fa9c3d7 | 1727 | } |
6eb5f6b9 JH |
1728 | } |
1729 | ||
2a782b5b | 1730 | DEBUG_r({ |
228fe6e6 AL |
1731 | const char * const s0 = UTF |
1732 | ? pv_uni_display(dsv0, (U8*)prog->precomp, prog->prelen, 60, | |
1733 | UNI_DISPLAY_REGEX) | |
1734 | : prog->precomp; | |
1735 | const int len0 = UTF ? SvCUR(dsv0) : prog->prelen; | |
1736 | const char * const s1 = do_utf8 ? sv_uni_display(dsv1, sv, 60, | |
c728cb41 | 1737 | UNI_DISPLAY_REGEX) : startpos; |
228fe6e6 | 1738 | const int len1 = do_utf8 ? SvCUR(dsv1) : strend - startpos; |
2a782b5b JH |
1739 | if (!PL_colorset) |
1740 | reginitcolors(); | |
1741 | PerlIO_printf(Perl_debug_log, | |
5332c881 | 1742 | "%sMatching REx%s \"%s%*.*s%s%s\" against \"%s%.*s%s%s\"\n", |
2a782b5b | 1743 | PL_colors[4],PL_colors[5],PL_colors[0], |
9e55ce06 | 1744 | len0, len0, s0, |
2a782b5b | 1745 | PL_colors[1], |
9e55ce06 | 1746 | len0 > 60 ? "..." : "", |
2a782b5b | 1747 | PL_colors[0], |
9e55ce06 JH |
1748 | (int)(len1 > 60 ? 60 : len1), |
1749 | s1, PL_colors[1], | |
1750 | (len1 > 60 ? "..." : "") | |
2a782b5b JH |
1751 | ); |
1752 | }); | |
6eb5f6b9 JH |
1753 | |
1754 | /* Simplest case: anchored match need be tried only once. */ | |
1755 | /* [unless only anchor is BOL and multiline is set] */ | |
1756 | if (prog->reganch & (ROPT_ANCH & ~ROPT_ANCH_GPOS)) { | |
1757 | if (s == startpos && regtry(prog, startpos)) | |
1758 | goto got_it; | |
1759 | else if (PL_multiline || (prog->reganch & ROPT_IMPLICIT) | |
1760 | || (prog->reganch & ROPT_ANCH_MBOL)) /* XXXX SBOL? */ | |
1761 | { | |
1762 | char *end; | |
1763 | ||
1764 | if (minlen) | |
1765 | dontbother = minlen - 1; | |
1aa99e6b | 1766 | end = HOP3c(strend, -dontbother, strbeg) - 1; |
6eb5f6b9 | 1767 | /* for multiline we only have to try after newlines */ |
33b8afdf | 1768 | if (prog->check_substr || prog->check_utf8) { |
6eb5f6b9 JH |
1769 | if (s == startpos) |
1770 | goto after_try; | |
1771 | while (1) { | |
1772 | if (regtry(prog, s)) | |
1773 | goto got_it; | |
1774 | after_try: | |
1775 | if (s >= end) | |
1776 | goto phooey; | |
1777 | if (prog->reganch & RE_USE_INTUIT) { | |
1778 | s = re_intuit_start(prog, sv, s + 1, strend, flags, NULL); | |
1779 | if (!s) | |
1780 | goto phooey; | |
1781 | } | |
1782 | else | |
1783 | s++; | |
1784 | } | |
1785 | } else { | |
1786 | if (s > startpos) | |
1787 | s--; | |
1788 | while (s < end) { | |
1789 | if (*s++ == '\n') { /* don't need PL_utf8skip here */ | |
1790 | if (regtry(prog, s)) | |
1791 | goto got_it; | |
1792 | } | |
1793 | } | |
1794 | } | |
1795 | } | |
1796 | goto phooey; | |
1797 | } else if (prog->reganch & ROPT_ANCH_GPOS) { | |
1798 | if (regtry(prog, PL_reg_ganch)) | |
1799 | goto got_it; | |
1800 | goto phooey; | |
1801 | } | |
1802 | ||
1803 | /* Messy cases: unanchored match. */ | |
33b8afdf | 1804 | if ((prog->anchored_substr || prog->anchored_utf8) && prog->reganch & ROPT_SKIP) { |
6eb5f6b9 JH |
1805 | /* we have /x+whatever/ */ |
1806 | /* it must be a one character string (XXXX Except UTF?) */ | |
33b8afdf | 1807 | char ch; |
bf93d4cc GS |
1808 | #ifdef DEBUGGING |
1809 | int did_match = 0; | |
1810 | #endif | |
33b8afdf JH |
1811 | if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)) |
1812 | do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog); | |
fdac8c4b | 1813 | ch = SvPVX_const(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)[0]; |
bf93d4cc | 1814 | |
1aa99e6b | 1815 | if (do_utf8) { |
6eb5f6b9 JH |
1816 | while (s < strend) { |
1817 | if (*s == ch) { | |
bf93d4cc | 1818 | DEBUG_r( did_match = 1 ); |
6eb5f6b9 JH |
1819 | if (regtry(prog, s)) goto got_it; |
1820 | s += UTF8SKIP(s); | |
1821 | while (s < strend && *s == ch) | |
1822 | s += UTF8SKIP(s); | |
1823 | } | |
1824 | s += UTF8SKIP(s); | |
1825 | } | |
1826 | } | |
1827 | else { | |
1828 | while (s < strend) { | |
1829 | if (*s == ch) { | |
bf93d4cc | 1830 | DEBUG_r( did_match = 1 ); |
6eb5f6b9 JH |
1831 | if (regtry(prog, s)) goto got_it; |
1832 | s++; | |
1833 | while (s < strend && *s == ch) | |
1834 | s++; | |
1835 | } | |
1836 | s++; | |
1837 | } | |
1838 | } | |
b7953727 | 1839 | DEBUG_r(if (!did_match) |
bf93d4cc | 1840 | PerlIO_printf(Perl_debug_log, |
b7953727 JH |
1841 | "Did not find anchored character...\n") |
1842 | ); | |
6eb5f6b9 | 1843 | } |
33b8afdf JH |
1844 | else if (prog->anchored_substr != Nullsv |
1845 | || prog->anchored_utf8 != Nullsv | |
1846 | || ((prog->float_substr != Nullsv || prog->float_utf8 != Nullsv) | |
1847 | && prog->float_max_offset < strend - s)) { | |
1848 | SV *must; | |
1849 | I32 back_max; | |
1850 | I32 back_min; | |
1851 | char *last; | |
6eb5f6b9 | 1852 | char *last1; /* Last position checked before */ |
bf93d4cc GS |
1853 | #ifdef DEBUGGING |
1854 | int did_match = 0; | |
1855 | #endif | |
33b8afdf JH |
1856 | if (prog->anchored_substr || prog->anchored_utf8) { |
1857 | if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)) | |
1858 | do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog); | |
1859 | must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr; | |
1860 | back_max = back_min = prog->anchored_offset; | |
1861 | } else { | |
1862 | if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) | |
1863 | do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog); | |
1864 | must = do_utf8 ? prog->float_utf8 : prog->float_substr; | |
1865 | back_max = prog->float_max_offset; | |
1866 | back_min = prog->float_min_offset; | |
1867 | } | |
1868 | if (must == &PL_sv_undef) | |
1869 | /* could not downgrade utf8 check substring, so must fail */ | |
1870 | goto phooey; | |
1871 | ||
1872 | last = HOP3c(strend, /* Cannot start after this */ | |
1873 | -(I32)(CHR_SVLEN(must) | |
1874 | - (SvTAIL(must) != 0) + back_min), strbeg); | |
6eb5f6b9 JH |
1875 | |
1876 | if (s > PL_bostr) | |
1877 | last1 = HOPc(s, -1); | |
1878 | else | |
1879 | last1 = s - 1; /* bogus */ | |
1880 | ||
5332c881 | 1881 | /* XXXX check_substr already used to find "s", can optimize if |
6eb5f6b9 JH |
1882 | check_substr==must. */ |
1883 | scream_pos = -1; | |
1884 | dontbother = end_shift; | |
1885 | strend = HOPc(strend, -dontbother); | |
1886 | while ( (s <= last) && | |
9041c2e3 | 1887 | ((flags & REXEC_SCREAM) |
1aa99e6b | 1888 | ? (s = screaminstr(sv, must, HOP3c(s, back_min, strend) - strbeg, |
6eb5f6b9 | 1889 | end_shift, &scream_pos, 0)) |
1aa99e6b | 1890 | : (s = fbm_instr((unsigned char*)HOP3(s, back_min, strend), |
9041c2e3 | 1891 | (unsigned char*)strend, must, |
6eb5f6b9 | 1892 | PL_multiline ? FBMrf_MULTILINE : 0))) ) { |
88af3bc3 JH |
1893 | /* we may be pointing at the wrong string */ |
1894 | if ((flags & REXEC_SCREAM) && RX_MATCH_COPIED(prog)) | |
fdac8c4b | 1895 | s = strbeg + (s - SvPVX_const(sv)); |
bf93d4cc | 1896 | DEBUG_r( did_match = 1 ); |
6eb5f6b9 JH |
1897 | if (HOPc(s, -back_max) > last1) { |
1898 | last1 = HOPc(s, -back_min); | |
1899 | s = HOPc(s, -back_max); | |
1900 | } | |
1901 | else { | |
1902 | char *t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1; | |
1903 | ||
1904 | last1 = HOPc(s, -back_min); | |
1905 | s = t; | |
1906 | } | |
1aa99e6b | 1907 | if (do_utf8) { |
6eb5f6b9 JH |
1908 | while (s <= last1) { |
1909 | if (regtry(prog, s)) | |
1910 | goto got_it; | |
1911 | s += UTF8SKIP(s); | |
1912 | } | |
1913 | } | |
1914 | else { | |
1915 | while (s <= last1) { | |
1916 | if (regtry(prog, s)) | |
1917 | goto got_it; | |
1918 | s++; | |
1919 | } | |
1920 | } | |
1921 | } | |
b7953727 JH |
1922 | DEBUG_r(if (!did_match) |
1923 | PerlIO_printf(Perl_debug_log, | |
5332c881 | 1924 | "Did not find %s substr \"%s%.*s%s\"%s...\n", |
33b8afdf | 1925 | ((must == prog->anchored_substr || must == prog->anchored_utf8) |
bf93d4cc GS |
1926 | ? "anchored" : "floating"), |
1927 | PL_colors[0], | |
1928 | (int)(SvCUR(must) - (SvTAIL(must)!=0)), | |
fdac8c4b | 1929 | SvPVX_const(must), |
b7953727 JH |
1930 | PL_colors[1], (SvTAIL(must) ? "$" : "")) |
1931 | ); | |
6eb5f6b9 JH |
1932 | goto phooey; |
1933 | } | |
155aba94 | 1934 | else if ((c = prog->regstclass)) { |
e19fe81c JH |
1935 | if (minlen) { |
1936 | I32 op = (U8)OP(prog->regstclass); | |
66e933ab | 1937 | /* don't bother with what can't match */ |
e19fe81c JH |
1938 | if (PL_regkind[op] != EXACT && op != CANY) |
1939 | strend = HOPc(strend, -(minlen - 1)); | |
1940 | } | |
ffc61ed2 JH |
1941 | DEBUG_r({ |
1942 | SV *prop = sv_newmortal(); | |
71a0dd65 NC |
1943 | const char *s0; |
1944 | const char *s1; | |
9e55ce06 JH |
1945 | int len0; |
1946 | int len1; | |
1947 | ||
ffc61ed2 | 1948 | regprop(prop, c); |
9e55ce06 | 1949 | s0 = UTF ? |
fdac8c4b | 1950 | pv_uni_display(dsv0, (U8*)SvPVX_const(prop), SvCUR(prop), 60, |
c728cb41 | 1951 | UNI_DISPLAY_REGEX) : |
71a0dd65 | 1952 | SvPVX_const(prop); |
9e55ce06 JH |
1953 | len0 = UTF ? SvCUR(dsv0) : SvCUR(prop); |
1954 | s1 = UTF ? | |
c728cb41 | 1955 | sv_uni_display(dsv1, sv, 60, UNI_DISPLAY_REGEX) : s; |
9e55ce06 JH |
1956 | len1 = UTF ? SvCUR(dsv1) : strend - s; |
1957 | PerlIO_printf(Perl_debug_log, | |
5332c881 | 1958 | "Matching stclass \"%*.*s\" against \"%*.*s\"\n", |
9e55ce06 JH |
1959 | len0, len0, s0, |
1960 | len1, len1, s1); | |
ffc61ed2 | 1961 | }); |
ec6f298e | 1962 | if (find_byclass(prog, c, s, strend, 0)) |
6eb5f6b9 | 1963 | goto got_it; |
bf93d4cc | 1964 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass...\n")); |
d6a28714 JH |
1965 | } |
1966 | else { | |
1967 | dontbother = 0; | |
33b8afdf JH |
1968 | if (prog->float_substr != Nullsv || prog->float_utf8 != Nullsv) { |
1969 | /* Trim the end. */ | |
d6a28714 | 1970 | char *last; |
33b8afdf JH |
1971 | SV* float_real; |
1972 | ||
1973 | if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) | |
1974 | do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog); | |
1975 | float_real = do_utf8 ? prog->float_utf8 : prog->float_substr; | |
d6a28714 JH |
1976 | |
1977 | if (flags & REXEC_SCREAM) { | |
33b8afdf | 1978 | last = screaminstr(sv, float_real, s - strbeg, |
d6a28714 JH |
1979 | end_shift, &scream_pos, 1); /* last one */ |
1980 | if (!last) | |
ffc61ed2 | 1981 | last = scream_olds; /* Only one occurrence. */ |
88af3bc3 JH |
1982 | /* we may be pointing at the wrong string */ |
1983 | else if (RX_MATCH_COPIED(prog)) | |
fdac8c4b | 1984 | s = strbeg + (s - SvPVX_const(sv)); |
b8c5462f | 1985 | } |
d6a28714 JH |
1986 | else { |
1987 | STRLEN len; | |
71a0dd65 | 1988 | const char * const little = SvPV_const(float_real, len); |
d6a28714 | 1989 | |
33b8afdf | 1990 | if (SvTAIL(float_real)) { |
d6a28714 JH |
1991 | if (memEQ(strend - len + 1, little, len - 1)) |
1992 | last = strend - len + 1; | |
1993 | else if (!PL_multiline) | |
9041c2e3 | 1994 | last = memEQ(strend - len, little, len) |
d6a28714 | 1995 | ? strend - len : Nullch; |
b8c5462f | 1996 | else |
d6a28714 JH |
1997 | goto find_last; |
1998 | } else { | |
1999 | find_last: | |
9041c2e3 | 2000 | if (len) |
d6a28714 | 2001 | last = rninstr(s, strend, little, little + len); |
b8c5462f | 2002 | else |
5332c881 | 2003 | last = strend; /* matching "$" */ |
b8c5462f | 2004 | } |
b8c5462f | 2005 | } |
bf93d4cc GS |
2006 | if (last == NULL) { |
2007 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
2008 | "%sCan't trim the tail, match fails (should not happen)%s\n", | |
2009 | PL_colors[4],PL_colors[5])); | |
2010 | goto phooey; /* Should not happen! */ | |
2011 | } | |
d6a28714 JH |
2012 | dontbother = strend - last + prog->float_min_offset; |
2013 | } | |
2014 | if (minlen && (dontbother < minlen)) | |
2015 | dontbother = minlen - 1; | |
2016 | strend -= dontbother; /* this one's always in bytes! */ | |
2017 | /* We don't know much -- general case. */ | |
1aa99e6b | 2018 | if (do_utf8) { |
d6a28714 JH |
2019 | for (;;) { |
2020 | if (regtry(prog, s)) | |
2021 | goto got_it; | |
2022 | if (s >= strend) | |
2023 | break; | |
b8c5462f | 2024 | s += UTF8SKIP(s); |
d6a28714 JH |
2025 | }; |
2026 | } | |
2027 | else { | |
2028 | do { | |
2029 | if (regtry(prog, s)) | |
2030 | goto got_it; | |
2031 | } while (s++ < strend); | |
2032 | } | |
2033 | } | |
2034 | ||
2035 | /* Failure. */ | |
2036 | goto phooey; | |
2037 | ||
2038 | got_it: | |
2039 | RX_MATCH_TAINTED_set(prog, PL_reg_flags & RF_tainted); | |
2040 | ||
2041 | if (PL_reg_eval_set) { | |
2042 | /* Preserve the current value of $^R */ | |
2043 | if (oreplsv != GvSV(PL_replgv)) | |
2044 | sv_setsv(oreplsv, GvSV(PL_replgv));/* So that when GvSV(replgv) is | |
2045 | restored, the value remains | |
2046 | the same. */ | |
acfe0abc | 2047 | restore_pos(aTHX_ 0); |
d6a28714 JH |
2048 | } |
2049 | ||
2050 | /* make sure $`, $&, $', and $digit will work later */ | |
2051 | if ( !(flags & REXEC_NOT_FIRST) ) { | |
2052 | if (RX_MATCH_COPIED(prog)) { | |
2053 | Safefree(prog->subbeg); | |
2054 | RX_MATCH_COPIED_off(prog); | |
2055 | } | |
2056 | if (flags & REXEC_COPY_STR) { | |
2057 | I32 i = PL_regeol - startpos + (stringarg - strbeg); | |
2058 | ||
2059 | s = savepvn(strbeg, i); | |
2060 | prog->subbeg = s; | |
2061 | prog->sublen = i; | |
2062 | RX_MATCH_COPIED_on(prog); | |
2063 | } | |
2064 | else { | |
2065 | prog->subbeg = strbeg; | |
2066 | prog->sublen = PL_regeol - strbeg; /* strend may have been modified */ | |
2067 | } | |
2068 | } | |
9041c2e3 | 2069 | |
d6a28714 JH |
2070 | return 1; |
2071 | ||
2072 | phooey: | |
bf93d4cc GS |
2073 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n", |
2074 | PL_colors[4],PL_colors[5])); | |
d6a28714 | 2075 | if (PL_reg_eval_set) |
acfe0abc | 2076 | restore_pos(aTHX_ 0); |
d6a28714 JH |
2077 | return 0; |
2078 | } | |
2079 | ||
2080 | /* | |
2081 | - regtry - try match at specific point | |
2082 | */ | |
2083 | STATIC I32 /* 0 failure, 1 success */ | |
2084 | S_regtry(pTHX_ regexp *prog, char *startpos) | |
2085 | { | |
d6a28714 JH |
2086 | register I32 i; |
2087 | register I32 *sp; | |
2088 | register I32 *ep; | |
2089 | CHECKPOINT lastcp; | |
2090 | ||
02db2b7b IZ |
2091 | #ifdef DEBUGGING |
2092 | PL_regindent = 0; /* XXXX Not good when matches are reenterable... */ | |
2093 | #endif | |
d6a28714 JH |
2094 | if ((prog->reganch & ROPT_EVAL_SEEN) && !PL_reg_eval_set) { |
2095 | MAGIC *mg; | |
2096 | ||
2097 | PL_reg_eval_set = RS_init; | |
2098 | DEBUG_r(DEBUG_s( | |
b900a521 JH |
2099 | PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n", |
2100 | (IV)(PL_stack_sp - PL_stack_base)); | |
d6a28714 | 2101 | )); |
e8347627 | 2102 | SAVEI32(cxstack[cxstack_ix].blk_oldsp); |
d6a28714 JH |
2103 | cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base; |
2104 | /* Otherwise OP_NEXTSTATE will free whatever on stack now. */ | |
2105 | SAVETMPS; | |
2106 | /* Apparently this is not needed, judging by wantarray. */ | |
e8347627 | 2107 | /* SAVEI8(cxstack[cxstack_ix].blk_gimme); |
d6a28714 JH |
2108 | cxstack[cxstack_ix].blk_gimme = G_SCALAR; */ |
2109 | ||
2110 | if (PL_reg_sv) { | |
2111 | /* Make $_ available to executed code. */ | |
2112 | if (PL_reg_sv != DEFSV) { | |
4d1ff10f | 2113 | /* SAVE_DEFSV does *not* suffice here for USE_5005THREADS */ |
d6a28714 JH |
2114 | SAVESPTR(DEFSV); |
2115 | DEFSV = PL_reg_sv; | |
b8c5462f | 2116 | } |
d6a28714 | 2117 | |
9041c2e3 | 2118 | if (!(SvTYPE(PL_reg_sv) >= SVt_PVMG && SvMAGIC(PL_reg_sv) |
14befaf4 | 2119 | && (mg = mg_find(PL_reg_sv, PERL_MAGIC_regex_global)))) { |
d6a28714 | 2120 | /* prepare for quick setting of pos */ |
14befaf4 DM |
2121 | sv_magic(PL_reg_sv, (SV*)0, |
2122 | PERL_MAGIC_regex_global, Nullch, 0); | |
2123 | mg = mg_find(PL_reg_sv, PERL_MAGIC_regex_global); | |
d6a28714 | 2124 | mg->mg_len = -1; |
b8c5462f | 2125 | } |
d6a28714 JH |
2126 | PL_reg_magic = mg; |
2127 | PL_reg_oldpos = mg->mg_len; | |
c76ac1ee | 2128 | SAVEDESTRUCTOR_X(restore_pos, 0); |
d6a28714 | 2129 | } |
09687e5a | 2130 | if (!PL_reg_curpm) { |
cd7a8267 | 2131 | Newxz(PL_reg_curpm, 1, PMOP); |
09687e5a AB |
2132 | #ifdef USE_ITHREADS |
2133 | { | |
2134 | SV* repointer = newSViv(0); | |
577e12cc | 2135 | /* so we know which PL_regex_padav element is PL_reg_curpm */ |
35061a7e | 2136 | SvFLAGS(repointer) |= SVf_BREAK; |
09687e5a AB |
2137 | av_push(PL_regex_padav,repointer); |
2138 | PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav); | |
2139 | PL_regex_pad = AvARRAY(PL_regex_padav); | |
2140 | } | |
2141 | #endif | |
2142 | } | |
aaa362c4 | 2143 | PM_SETRE(PL_reg_curpm, prog); |
d6a28714 JH |
2144 | PL_reg_oldcurpm = PL_curpm; |
2145 | PL_curpm = PL_reg_curpm; | |
2146 | if (RX_MATCH_COPIED(prog)) { | |
2147 | /* Here is a serious problem: we cannot rewrite subbeg, | |
2148 | since it may be needed if this match fails. Thus | |
2149 | $` inside (?{}) could fail... */ | |
2150 | PL_reg_oldsaved = prog->subbeg; | |
2151 | PL_reg_oldsavedlen = prog->sublen; | |
2152 | RX_MATCH_COPIED_off(prog); | |
2153 | } | |
2154 | else | |
2155 | PL_reg_oldsaved = Nullch; | |
2156 | prog->subbeg = PL_bostr; | |
2157 | prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */ | |
2158 | } | |
2159 | prog->startp[0] = startpos - PL_bostr; | |
2160 | PL_reginput = startpos; | |
2161 | PL_regstartp = prog->startp; | |
2162 | PL_regendp = prog->endp; | |
2163 | PL_reglastparen = &prog->lastparen; | |
a01268b5 | 2164 | PL_reglastcloseparen = &prog->lastcloseparen; |
d6a28714 | 2165 | prog->lastparen = 0; |
4f4e7967 | 2166 | prog->lastcloseparen = 0; |
d6a28714 JH |
2167 | PL_regsize = 0; |
2168 | DEBUG_r(PL_reg_starttry = startpos); | |
2169 | if (PL_reg_start_tmpl <= prog->nparens) { | |
2170 | PL_reg_start_tmpl = prog->nparens*3/2 + 3; | |
2171 | if(PL_reg_start_tmp) | |
2172 | Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*); | |
2173 | else | |
cd7a8267 | 2174 | Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*); |
d6a28714 JH |
2175 | } |
2176 | ||
2177 | /* XXXX What this code is doing here?!!! There should be no need | |
2178 | to do this again and again, PL_reglastparen should take care of | |
3dd2943c | 2179 | this! --ilya*/ |
dafc8851 JH |
2180 | |
2181 | /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code. | |
2182 | * Actually, the code in regcppop() (which Ilya may be meaning by | |
daf18116 JH |
2183 | * PL_reglastparen), is not needed at all by the test suite |
2184 | * (op/regexp, op/pat, op/split), but that code is needed, oddly | |
2185 | * enough, for building DynaLoader, or otherwise this | |
2186 | * "Error: '*' not in typemap in DynaLoader.xs, line 164" | |
2187 | * will happen. Meanwhile, this code *is* needed for the | |
2188 | * above-mentioned test suite tests to succeed. The common theme | |
2189 | * on those tests seems to be returning null fields from matches. | |
2190 | * --jhi */ | |
dafc8851 | 2191 | #if 1 |
d6a28714 JH |
2192 | sp = prog->startp; |
2193 | ep = prog->endp; | |
2194 | if (prog->nparens) { | |
eb160463 | 2195 | for (i = prog->nparens; i > (I32)*PL_reglastparen; i--) { |
d6a28714 JH |
2196 | *++sp = -1; |
2197 | *++ep = -1; | |
2198 | } | |
2199 | } | |
dafc8851 | 2200 | #endif |
02db2b7b | 2201 | REGCP_SET(lastcp); |
d6a28714 JH |
2202 | if (regmatch(prog->program + 1)) { |
2203 | prog->endp[0] = PL_reginput - PL_bostr; | |
2204 | return 1; | |
2205 | } | |
02db2b7b | 2206 | REGCP_UNWIND(lastcp); |
d6a28714 JH |
2207 | return 0; |
2208 | } | |
2209 | ||
02db2b7b IZ |
2210 | #define RE_UNWIND_BRANCH 1 |
2211 | #define RE_UNWIND_BRANCHJ 2 | |
2212 | ||
2213 | union re_unwind_t; | |
2214 | ||
2215 | typedef struct { /* XX: makes sense to enlarge it... */ | |
2216 | I32 type; | |
2217 | I32 prev; | |
2218 | CHECKPOINT lastcp; | |
2219 | } re_unwind_generic_t; | |
2220 | ||
2221 | typedef struct { | |
2222 | I32 type; | |
2223 | I32 prev; | |
2224 | CHECKPOINT lastcp; | |
2225 | I32 lastparen; | |
2226 | regnode *next; | |
2227 | char *locinput; | |
2228 | I32 nextchr; | |
2229 | #ifdef DEBUGGING | |
2230 | int regindent; | |
2231 | #endif | |
2232 | } re_unwind_branch_t; | |
2233 | ||
2234 | typedef union re_unwind_t { | |
2235 | I32 type; | |
2236 | re_unwind_generic_t generic; | |
2237 | re_unwind_branch_t branch; | |
2238 | } re_unwind_t; | |
2239 | ||
8ba1375e MJD |
2240 | #define sayYES goto yes |
2241 | #define sayNO goto no | |
e0f9d4a8 | 2242 | #define sayNO_ANYOF goto no_anyof |
8ba1375e MJD |
2243 | #define sayYES_FINAL goto yes_final |
2244 | #define sayYES_LOUD goto yes_loud | |
2245 | #define sayNO_FINAL goto no_final | |
2246 | #define sayNO_SILENT goto do_no | |
2247 | #define saySAME(x) if (x) goto yes; else goto no | |
2248 | ||
6e00f9c6 HS |
2249 | #define POSCACHE_SUCCESS 0 /* caching success rather than failure */ |
2250 | #define POSCACHE_SEEN 1 /* we know what we're caching */ | |
2251 | #define POSCACHE_START 2 /* the real cache: this bit maps to pos 0 */ | |
2252 | #define CACHEsayYES STMT_START { \ | |
2253 | if (cache_offset | cache_bit) { \ | |
2254 | if (!(PL_reg_poscache[0] & (1<<POSCACHE_SEEN))) \ | |
2255 | PL_reg_poscache[0] |= (1<<POSCACHE_SUCCESS) || (1<<POSCACHE_SEEN); \ | |
2256 | else if (!(PL_reg_poscache[0] & (1<<POSCACHE_SUCCESS))) { \ | |
2257 | /* cache records failure, but this is success */ \ | |
2258 | DEBUG_r( \ | |
2259 | PerlIO_printf(Perl_debug_log, \ | |
2260 | "%*s (remove success from failure cache)\n", \ | |
2261 | REPORT_CODE_OFF+PL_regindent*2, "") \ | |
2262 | ); \ | |
2263 | PL_reg_poscache[cache_offset] &= ~(1<<cache_bit); \ | |
2264 | } \ | |
2265 | } \ | |
2266 | sayYES; \ | |
2267 | } STMT_END | |
2268 | #define CACHEsayNO STMT_START { \ | |
2269 | if (cache_offset | cache_bit) { \ | |
2270 | if (!(PL_reg_poscache[0] & (1<<POSCACHE_SEEN))) \ | |
2271 | PL_reg_poscache[0] |= (1<<POSCACHE_SEEN); \ | |
2272 | else if ((PL_reg_poscache[0] & (1<<POSCACHE_SUCCESS))) { \ | |
2273 | /* cache records success, but this is failure */ \ | |
2274 | DEBUG_r( \ | |
2275 | PerlIO_printf(Perl_debug_log, \ | |
2276 | "%*s (remove failure from success cache)\n", \ | |
2277 | REPORT_CODE_OFF+PL_regindent*2, "") \ | |
2278 | ); \ | |
2279 | PL_reg_poscache[cache_offset] &= ~(1<<cache_bit); \ | |
2280 | } \ | |
2281 | } \ | |
2282 | sayNO; \ | |
2283 | } STMT_END | |
2284 | ||
8ba1375e MJD |
2285 | #define REPORT_CODE_OFF 24 |
2286 | ||
d6a28714 JH |
2287 | /* |
2288 | - regmatch - main matching routine | |
2289 | * | |
2290 | * Conceptually the strategy is simple: check to see whether the current | |
2291 | * node matches, call self recursively to see whether the rest matches, | |
2292 | * and then act accordingly. In practice we make some effort to avoid | |
2293 | * recursion, in particular by going through "ordinary" nodes (that don't | |
2294 | * need to know whether the rest of the match failed) by a loop instead of | |
2295 | * by recursion. | |
2296 | */ | |
2297 | /* [lwall] I've hoisted the register declarations to the outer block in order to | |
2298 | * maybe save a little bit of pushing and popping on the stack. It also takes | |
2299 | * advantage of machines that use a register save mask on subroutine entry. | |
2300 | */ | |
2301 | STATIC I32 /* 0 failure, 1 success */ | |
2302 | S_regmatch(pTHX_ regnode *prog) | |
2303 | { | |
d6a28714 JH |
2304 | register regnode *scan; /* Current node. */ |
2305 | regnode *next; /* Next node. */ | |
2306 | regnode *inner; /* Next node in internal branch. */ | |
2307 | register I32 nextchr; /* renamed nextchr - nextchar colides with | |
2308 | function of same name */ | |
2309 | register I32 n; /* no or next */ | |
b7953727 JH |
2310 | register I32 ln = 0; /* len or last */ |
2311 | register char *s = Nullch; /* operand or save */ | |
d6a28714 | 2312 | register char *locinput = PL_reginput; |
b7953727 | 2313 | register I32 c1 = 0, c2 = 0, paren; /* case fold search, parenth */ |
d6a28714 | 2314 | int minmod = 0, sw = 0, logical = 0; |
02db2b7b | 2315 | I32 unwind = 0; |
b7953727 | 2316 | #if 0 |
02db2b7b | 2317 | I32 firstcp = PL_savestack_ix; |
b7953727 | 2318 | #endif |
8c18bf38 | 2319 | const register bool do_utf8 = PL_reg_match_utf8; |
2a782b5b | 2320 | #ifdef DEBUGGING |
ce333219 JH |
2321 | SV *dsv0 = PERL_DEBUG_PAD_ZERO(0); |
2322 | SV *dsv1 = PERL_DEBUG_PAD_ZERO(1); | |
2323 | SV *dsv2 = PERL_DEBUG_PAD_ZERO(2); | |
2a782b5b | 2324 | #endif |
02db2b7b | 2325 | |
d6a28714 JH |
2326 | #ifdef DEBUGGING |
2327 | PL_regindent++; | |
2328 | #endif | |
2329 | ||
2330 | /* Note that nextchr is a byte even in UTF */ | |
2331 | nextchr = UCHARAT(locinput); | |
2332 | scan = prog; | |
2333 | while (scan != NULL) { | |
8ba1375e | 2334 | |
2a782b5b | 2335 | DEBUG_r( { |
d6a28714 | 2336 | SV *prop = sv_newmortal(); |
228fe6e6 AL |
2337 | const int docolor = *PL_colors[0]; |
2338 | const int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */ | |
1aa99e6b | 2339 | int l = (PL_regeol - locinput) > taill ? taill : (PL_regeol - locinput); |
d6a28714 JH |
2340 | /* The part of the string before starttry has one color |
2341 | (pref0_len chars), between starttry and current | |
2342 | position another one (pref_len - pref0_len chars), | |
2343 | after the current position the third one. | |
2344 | We assume that pref0_len <= pref_len, otherwise we | |
2345 | decrease pref0_len. */ | |
9041c2e3 | 2346 | int pref_len = (locinput - PL_bostr) > (5 + taill) - l |
1aa99e6b IH |
2347 | ? (5 + taill) - l : locinput - PL_bostr; |
2348 | int pref0_len; | |
d6a28714 | 2349 | |
df1ffd02 | 2350 | while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len))) |
1aa99e6b IH |
2351 | pref_len++; |
2352 | pref0_len = pref_len - (locinput - PL_reg_starttry); | |
d6a28714 | 2353 | if (l + pref_len < (5 + taill) && l < PL_regeol - locinput) |
9041c2e3 | 2354 | l = ( PL_regeol - locinput > (5 + taill) - pref_len |
d6a28714 | 2355 | ? (5 + taill) - pref_len : PL_regeol - locinput); |
df1ffd02 | 2356 | while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput + l))) |
1aa99e6b | 2357 | l--; |
d6a28714 JH |
2358 | if (pref0_len < 0) |
2359 | pref0_len = 0; | |
2360 | if (pref0_len > pref_len) | |
2361 | pref0_len = pref_len; | |
2362 | regprop(prop, scan); | |
2a782b5b | 2363 | { |
228fe6e6 | 2364 | const char * const s0 = |
e19fe81c | 2365 | do_utf8 && OP(scan) != CANY ? |
2a782b5b | 2366 | pv_uni_display(dsv0, (U8*)(locinput - pref_len), |
c728cb41 | 2367 | pref0_len, 60, UNI_DISPLAY_REGEX) : |
2a782b5b | 2368 | locinput - pref_len; |
228fe6e6 AL |
2369 | const int len0 = do_utf8 ? strlen(s0) : pref0_len; |
2370 | const char * const s1 = do_utf8 && OP(scan) != CANY ? | |
2a782b5b | 2371 | pv_uni_display(dsv1, (U8*)(locinput - pref_len + pref0_len), |
c728cb41 | 2372 | pref_len - pref0_len, 60, UNI_DISPLAY_REGEX) : |
2a782b5b | 2373 | locinput - pref_len + pref0_len; |
228fe6e6 AL |
2374 | const int len1 = do_utf8 ? strlen(s1) : pref_len - pref0_len; |
2375 | const char * const s2 = do_utf8 && OP(scan) != CANY ? | |
2a782b5b | 2376 | pv_uni_display(dsv2, (U8*)locinput, |
c728cb41 | 2377 | PL_regeol - locinput, 60, UNI_DISPLAY_REGEX) : |
2a782b5b | 2378 | locinput; |
228fe6e6 | 2379 | const int len2 = do_utf8 ? strlen(s2) : l; |
2a782b5b JH |
2380 | PerlIO_printf(Perl_debug_log, |
2381 | "%4"IVdf" <%s%.*s%s%s%.*s%s%s%s%.*s%s>%*s|%3"IVdf":%*s%s\n", | |
2382 | (IV)(locinput - PL_bostr), | |
2383 | PL_colors[4], | |
2384 | len0, s0, | |
2385 | PL_colors[5], | |
2386 | PL_colors[2], | |
2387 | len1, s1, | |
2388 | PL_colors[3], | |
2389 | (docolor ? "" : "> <"), | |
2390 | PL_colors[0], | |
2391 | len2, s2, | |
2392 | PL_colors[1], | |
2393 | 15 - l - pref_len + 1, | |
2394 | "", | |
2395 | (IV)(scan - PL_regprogram), PL_regindent*2, "", | |
fdac8c4b | 2396 | SvPVX_const(prop)); |
2a782b5b JH |
2397 | } |
2398 | }); | |
d6a28714 JH |
2399 | |
2400 | next = scan + NEXT_OFF(scan); | |
2401 | if (next == scan) | |
2402 | next = NULL; | |
2403 | ||
2404 | switch (OP(scan)) { | |
2405 | case BOL: | |
12d33761 HS |
2406 | if (locinput == PL_bostr || (PL_multiline && |
2407 | (nextchr || locinput < PL_regeol) && locinput[-1] == '\n') ) | |
d6a28714 JH |
2408 | { |
2409 | /* regtill = regbol; */ | |
b8c5462f JH |
2410 | break; |
2411 | } | |
d6a28714 JH |
2412 | sayNO; |
2413 | case MBOL: | |
12d33761 HS |
2414 | if (locinput == PL_bostr || |
2415 | ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n')) | |
d6a28714 | 2416 | { |
b8c5462f JH |
2417 | break; |
2418 | } | |
d6a28714 JH |
2419 | sayNO; |
2420 | case SBOL: | |
c2a73568 | 2421 | if (locinput == PL_bostr) |
b8c5462f | 2422 | break; |
d6a28714 JH |
2423 | sayNO; |
2424 | case GPOS: | |
2425 | if (locinput == PL_reg_ganch) | |
2426 | break; | |
2427 | sayNO; | |
2428 | case EOL: | |
2429 | if (PL_multiline) | |
2430 | goto meol; | |
2431 | else | |
2432 | goto seol; | |
2433 | case MEOL: | |
2434 | meol: | |
2435 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') | |
b8c5462f | 2436 | sayNO; |
b8c5462f | 2437 | break; |
d6a28714 JH |
2438 | case SEOL: |
2439 | seol: | |
2440 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') | |
b8c5462f | 2441 | sayNO; |
d6a28714 | 2442 | if (PL_regeol - locinput > 1) |
b8c5462f | 2443 | sayNO; |
b8c5462f | 2444 | break; |
d6a28714 JH |
2445 | case EOS: |
2446 | if (PL_regeol != locinput) | |
b8c5462f | 2447 | sayNO; |
d6a28714 | 2448 | break; |
ffc61ed2 | 2449 | case SANY: |
d6a28714 | 2450 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 | 2451 | sayNO; |
f33976b4 DB |
2452 | if (do_utf8) { |
2453 | locinput += PL_utf8skip[nextchr]; | |
2454 | if (locinput > PL_regeol) | |
2455 | sayNO; | |
2456 | nextchr = UCHARAT(locinput); | |
2457 | } | |
2458 | else | |
2459 | nextchr = UCHARAT(++locinput); | |
2460 | break; | |
2461 | case CANY: | |
2462 | if (!nextchr && locinput >= PL_regeol) | |
2463 | sayNO; | |
b8c5462f | 2464 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 2465 | break; |
ffc61ed2 | 2466 | case REG_ANY: |
1aa99e6b IH |
2467 | if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n') |
2468 | sayNO; | |
2469 | if (do_utf8) { | |
b8c5462f | 2470 | locinput += PL_utf8skip[nextchr]; |
d6a28714 JH |
2471 | if (locinput > PL_regeol) |
2472 | sayNO; | |
a0ed51b3 | 2473 | nextchr = UCHARAT(locinput); |
a0ed51b3 | 2474 | } |
1aa99e6b IH |
2475 | else |
2476 | nextchr = UCHARAT(++locinput); | |
a0ed51b3 | 2477 | break; |
8c18bf38 | 2478 | |
d6a28714 | 2479 | case EXACT: |
cd439c50 IZ |
2480 | s = STRING(scan); |
2481 | ln = STR_LEN(scan); | |
eb160463 | 2482 | if (do_utf8 != UTF) { |
bc517b45 | 2483 | /* The target and the pattern have differing utf8ness. */ |
1aa99e6b | 2484 | char *l = locinput; |
8c18bf38 | 2485 | const char *e = s + ln; |
a72c7584 | 2486 | |
5ff6fc6d JH |
2487 | if (do_utf8) { |
2488 | /* The target is utf8, the pattern is not utf8. */ | |
1aa99e6b | 2489 | while (s < e) { |
8c18bf38 | 2490 | STRLEN ulen; |
1aa99e6b | 2491 | if (l >= PL_regeol) |
5ff6fc6d JH |
2492 | sayNO; |
2493 | if (NATIVE_TO_UNI(*(U8*)s) != | |
a2a469f9 | 2494 | utf8n_to_uvuni((U8*)l, UTF8_MAXBYTES, &ulen, |
872c91ae JH |
2495 | ckWARN(WARN_UTF8) ? |
2496 | 0 : UTF8_ALLOW_ANY)) | |
5ff6fc6d | 2497 | sayNO; |
bc517b45 | 2498 | l += ulen; |
5ff6fc6d | 2499 | s ++; |
1aa99e6b | 2500 | } |
5ff6fc6d JH |
2501 | } |
2502 | else { | |
2503 | /* The target is not utf8, the pattern is utf8. */ | |
1aa99e6b | 2504 | while (s < e) { |
8c18bf38 | 2505 | STRLEN ulen; |
1aa99e6b IH |
2506 | if (l >= PL_regeol) |
2507 | sayNO; | |
5ff6fc6d | 2508 | if (NATIVE_TO_UNI(*((U8*)l)) != |
a2a469f9 | 2509 | utf8n_to_uvuni((U8*)s, UTF8_MAXBYTES, &ulen, |
872c91ae JH |
2510 | ckWARN(WARN_UTF8) ? |
2511 | 0 : UTF8_ALLOW_ANY)) | |
1aa99e6b | 2512 | sayNO; |
bc517b45 | 2513 | s += ulen; |
a72c7584 | 2514 | l ++; |
1aa99e6b | 2515 | } |
5ff6fc6d | 2516 | } |
1aa99e6b IH |
2517 | locinput = l; |
2518 | nextchr = UCHARAT(locinput); | |
2519 | break; | |
2520 | } | |
bc517b45 | 2521 | /* The target and the pattern have the same utf8ness. */ |
d6a28714 JH |
2522 | /* Inline the first character, for speed. */ |
2523 | if (UCHARAT(s) != nextchr) | |
2524 | sayNO; | |
2525 | if (PL_regeol - locinput < ln) | |
2526 | sayNO; | |
2527 | if (ln > 1 && memNE(s, locinput, ln)) | |
2528 | sayNO; | |
2529 | locinput += ln; | |
2530 | nextchr = UCHARAT(locinput); | |
2531 | break; | |
2532 | case EXACTFL: | |
b8c5462f JH |
2533 | PL_reg_flags |= RF_tainted; |
2534 | /* FALL THROUGH */ | |
d6a28714 | 2535 | case EXACTF: |
cd439c50 IZ |
2536 | s = STRING(scan); |
2537 | ln = STR_LEN(scan); | |
d6a28714 | 2538 | |
d07ddd77 JH |
2539 | if (do_utf8 || UTF) { |
2540 | /* Either target or the pattern are utf8. */ | |
d6a28714 | 2541 | char *l = locinput; |
d07ddd77 | 2542 | char *e = PL_regeol; |
bc517b45 | 2543 | |
eb160463 | 2544 | if (ibcmp_utf8(s, 0, ln, (bool)UTF, |
1feea2c7 | 2545 | l, &e, 0, do_utf8)) { |
5486206c JH |
2546 | /* One more case for the sharp s: |
2547 | * pack("U0U*", 0xDF) =~ /ss/i, | |
2548 | * the 0xC3 0x9F are the UTF-8 | |
2549 | * byte sequence for the U+00DF. */ | |
2550 | if (!(do_utf8 && | |
2551 | toLOWER(s[0]) == 's' && | |
2552 | ln >= 2 && | |
2553 | toLOWER(s[1]) == 's' && | |
2554 | (U8)l[0] == 0xC3 && | |
2555 | e - l >= 2 && | |
2556 | (U8)l[1] == 0x9F)) | |
2557 | sayNO; | |
2558 | } | |
d07ddd77 JH |
2559 | locinput = e; |
2560 | nextchr = UCHARAT(locinput); | |
2561 | break; | |
a0ed51b3 | 2562 | } |
d6a28714 | 2563 | |
bc517b45 JH |
2564 | /* Neither the target and the pattern are utf8. */ |
2565 | ||
d6a28714 JH |
2566 | /* Inline the first character, for speed. */ |
2567 | if (UCHARAT(s) != nextchr && | |
2568 | UCHARAT(s) != ((OP(scan) == EXACTF) | |
2569 | ? PL_fold : PL_fold_locale)[nextchr]) | |
a0ed51b3 | 2570 | sayNO; |
d6a28714 | 2571 | if (PL_regeol - locinput < ln) |
b8c5462f | 2572 | sayNO; |
d6a28714 JH |
2573 | if (ln > 1 && (OP(scan) == EXACTF |
2574 | ? ibcmp(s, locinput, ln) | |
2575 | : ibcmp_locale(s, locinput, ln))) | |
4633a7c4 | 2576 | sayNO; |
d6a28714 JH |
2577 | locinput += ln; |
2578 | nextchr = UCHARAT(locinput); | |
a0d0e21e | 2579 | break; |
d6a28714 | 2580 | case ANYOF: |
ffc61ed2 | 2581 | if (do_utf8) { |
9e55ce06 JH |
2582 | STRLEN inclasslen = PL_regeol - locinput; |
2583 | ||
ba7b4546 | 2584 | if (!reginclass(scan, (U8*)locinput, &inclasslen, do_utf8)) |
e0f9d4a8 | 2585 | sayNO_ANYOF; |
ffc61ed2 JH |
2586 | if (locinput >= PL_regeol) |
2587 | sayNO; | |
0f0076b4 | 2588 | locinput += inclasslen ? inclasslen : UTF8SKIP(locinput); |
b8c5462f | 2589 | nextchr = UCHARAT(locinput); |
e0f9d4a8 | 2590 | break; |
ffc61ed2 JH |
2591 | } |
2592 | else { | |
2593 | if (nextchr < 0) | |
2594 | nextchr = UCHARAT(locinput); | |
7d3e948e | 2595 | if (!REGINCLASS(scan, (U8*)locinput)) |
e0f9d4a8 | 2596 | sayNO_ANYOF; |
ffc61ed2 JH |
2597 | if (!nextchr && locinput >= PL_regeol) |
2598 | sayNO; | |
2599 | nextchr = UCHARAT(++locinput); | |
e0f9d4a8 JH |
2600 | break; |
2601 | } | |
2602 | no_anyof: | |
2603 | /* If we might have the case of the German sharp s | |
2604 | * in a casefolding Unicode character class. */ | |
2605 | ||
ebc501f0 JH |
2606 | if (ANYOF_FOLD_SHARP_S(scan, locinput, PL_regeol)) { |
2607 | locinput += SHARP_S_SKIP; | |
e0f9d4a8 | 2608 | nextchr = UCHARAT(locinput); |
ffc61ed2 | 2609 | } |
e0f9d4a8 JH |
2610 | else |
2611 | sayNO; | |
b8c5462f | 2612 | break; |
d6a28714 | 2613 | case ALNUML: |
b8c5462f JH |
2614 | PL_reg_flags |= RF_tainted; |
2615 | /* FALL THROUGH */ | |
d6a28714 | 2616 | case ALNUM: |
b8c5462f | 2617 | if (!nextchr) |
4633a7c4 | 2618 | sayNO; |
ffc61ed2 | 2619 | if (do_utf8) { |
fab1f349 | 2620 | LOAD_UTF8_CHARCLASS_ALNUM(); |
ffc61ed2 | 2621 | if (!(OP(scan) == ALNUM |
3568d838 | 2622 | ? swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8) |
d6a28714 | 2623 | : isALNUM_LC_utf8((U8*)locinput))) |
b8c5462f JH |
2624 | { |
2625 | sayNO; | |
a0ed51b3 | 2626 | } |
b8c5462f | 2627 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
2628 | nextchr = UCHARAT(locinput); |
2629 | break; | |
2630 | } | |
ffc61ed2 | 2631 | if (!(OP(scan) == ALNUM |
d6a28714 | 2632 | ? isALNUM(nextchr) : isALNUM_LC(nextchr))) |
bbce6d69 | 2633 | sayNO; |
b8c5462f | 2634 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 2635 | break; |
d6a28714 | 2636 | case NALNUML: |
b8c5462f JH |
2637 | PL_reg_flags |= RF_tainted; |
2638 | /* FALL THROUGH */ | |
d6a28714 JH |
2639 | case NALNUM: |
2640 | if (!nextchr && locinput >= PL_regeol) | |
a0ed51b3 | 2641 | sayNO; |
ffc61ed2 | 2642 | if (do_utf8) { |
fab1f349 | 2643 | LOAD_UTF8_CHARCLASS_ALNUM(); |
ffc61ed2 | 2644 | if (OP(scan) == NALNUM |
3568d838 | 2645 | ? swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8) |
d6a28714 JH |
2646 | : isALNUM_LC_utf8((U8*)locinput)) |
2647 | { | |
b8c5462f | 2648 | sayNO; |
d6a28714 | 2649 | } |
b8c5462f JH |
2650 | locinput += PL_utf8skip[nextchr]; |
2651 | nextchr = UCHARAT(locinput); | |
2652 | break; | |
2653 | } | |
ffc61ed2 | 2654 | if (OP(scan) == NALNUM |
d6a28714 | 2655 | ? isALNUM(nextchr) : isALNUM_LC(nextchr)) |
b8c5462f | 2656 | sayNO; |
76e3520e | 2657 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 2658 | break; |
d6a28714 JH |
2659 | case BOUNDL: |
2660 | case NBOUNDL: | |
3280af22 | 2661 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 2662 | /* FALL THROUGH */ |
d6a28714 JH |
2663 | case BOUND: |
2664 | case NBOUND: | |
2665 | /* was last char in word? */ | |
ffc61ed2 | 2666 | if (do_utf8) { |
12d33761 HS |
2667 | if (locinput == PL_bostr) |
2668 | ln = '\n'; | |
ffc61ed2 | 2669 | else { |
8c18bf38 | 2670 | const U8 * const r = reghop3((U8*)locinput, -1, (U8*)PL_bostr); |
9041c2e3 | 2671 | |
47a91a97 | 2672 | ln = utf8n_to_uvchr((U8 *)r, UTF8SKIP(r), 0, 0); |
ffc61ed2 JH |
2673 | } |
2674 | if (OP(scan) == BOUND || OP(scan) == NBOUND) { | |
2675 | ln = isALNUM_uni(ln); | |
fab1f349 | 2676 | LOAD_UTF8_CHARCLASS_ALNUM(); |
3568d838 | 2677 | n = swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8); |
ffc61ed2 JH |
2678 | } |
2679 | else { | |
9041c2e3 | 2680 | ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln)); |
ffc61ed2 JH |
2681 | n = isALNUM_LC_utf8((U8*)locinput); |
2682 | } | |
a0ed51b3 | 2683 | } |
d6a28714 | 2684 | else { |
12d33761 HS |
2685 | ln = (locinput != PL_bostr) ? |
2686 | UCHARAT(locinput - 1) : '\n'; | |
ffc61ed2 JH |
2687 | if (OP(scan) == BOUND || OP(scan) == NBOUND) { |
2688 | ln = isALNUM(ln); | |
2689 | n = isALNUM(nextchr); | |
2690 | } | |
2691 | else { | |
2692 | ln = isALNUM_LC(ln); | |
2693 | n = isALNUM_LC(nextchr); | |
2694 | } | |
d6a28714 | 2695 | } |
ffc61ed2 JH |
2696 | if (((!ln) == (!n)) == (OP(scan) == BOUND || |
2697 | OP(scan) == BOUNDL)) | |
2698 | sayNO; | |
a0ed51b3 | 2699 | break; |
d6a28714 | 2700 | case SPACEL: |
3280af22 | 2701 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 2702 | /* FALL THROUGH */ |
d6a28714 | 2703 | case SPACE: |
9442cb0e | 2704 | if (!nextchr) |
4633a7c4 | 2705 | sayNO; |
1aa99e6b | 2706 | if (do_utf8) { |
fd400ab9 | 2707 | if (UTF8_IS_CONTINUED(nextchr)) { |
fab1f349 | 2708 | LOAD_UTF8_CHARCLASS_SPACE(); |
ffc61ed2 | 2709 | if (!(OP(scan) == SPACE |
3568d838 | 2710 | ? swash_fetch(PL_utf8_space, (U8*)locinput, do_utf8) |
ffc61ed2 JH |
2711 | : isSPACE_LC_utf8((U8*)locinput))) |
2712 | { | |
2713 | sayNO; | |
2714 | } | |
2715 | locinput += PL_utf8skip[nextchr]; | |
2716 | nextchr = UCHARAT(locinput); | |
2717 | break; | |
d6a28714 | 2718 | } |
ffc61ed2 JH |
2719 | if (!(OP(scan) == SPACE |
2720 | ? isSPACE(nextchr) : isSPACE_LC(nextchr))) | |
2721 | sayNO; | |
2722 | nextchr = UCHARAT(++locinput); | |
2723 | } | |
2724 | else { | |
2725 | if (!(OP(scan) == SPACE | |
2726 | ? isSPACE(nextchr) : isSPACE_LC(nextchr))) | |
2727 | sayNO; | |
2728 | nextchr = UCHARAT(++locinput); | |
a0ed51b3 | 2729 | } |
a0ed51b3 | 2730 | break; |
d6a28714 | 2731 | case NSPACEL: |
3280af22 | 2732 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 2733 | /* FALL THROUGH */ |
d6a28714 | 2734 | case NSPACE: |
9442cb0e | 2735 | if (!nextchr && locinput >= PL_regeol) |
b8c5462f | 2736 | sayNO; |
1aa99e6b | 2737 | if (do_utf8) { |
fab1f349 | 2738 | LOAD_UTF8_CHARCLASS_SPACE(); |
ffc61ed2 | 2739 | if (OP(scan) == NSPACE |
3568d838 | 2740 | ? swash_fetch(PL_utf8_space, (U8*)locinput, do_utf8) |
d6a28714 | 2741 | : isSPACE_LC_utf8((U8*)locinput)) |
b8c5462f JH |
2742 | { |
2743 | sayNO; | |
2744 | } | |
2745 | locinput += PL_utf8skip[nextchr]; | |
2746 | nextchr = UCHARAT(locinput); | |
2747 | break; | |
a0ed51b3 | 2748 | } |
ffc61ed2 | 2749 | if (OP(scan) == NSPACE |
d6a28714 | 2750 | ? isSPACE(nextchr) : isSPACE_LC(nextchr)) |
4633a7c4 | 2751 | sayNO; |
76e3520e | 2752 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 2753 | break; |
d6a28714 | 2754 | case DIGITL: |
a0ed51b3 LW |
2755 | PL_reg_flags |= RF_tainted; |
2756 | /* FALL THROUGH */ | |
d6a28714 | 2757 | case DIGIT: |
9442cb0e | 2758 | if (!nextchr) |
a0ed51b3 | 2759 | sayNO; |
1aa99e6b | 2760 | if (do_utf8) { |
fab1f349 | 2761 | LOAD_UTF8_CHARCLASS_DIGIT(); |
ffc61ed2 | 2762 | if (!(OP(scan) == DIGIT |
3568d838 | 2763 | ? swash_fetch(PL_utf8_digit, (U8*)locinput, do_utf8) |
9442cb0e | 2764 | : isDIGIT_LC_utf8((U8*)locinput))) |
dfe13c55 | 2765 | { |
a0ed51b3 | 2766 | sayNO; |
dfe13c55 | 2767 | } |
6f06b55f | 2768 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
2769 | nextchr = UCHARAT(locinput); |
2770 | break; | |
2771 | } | |
ffc61ed2 | 2772 | if (!(OP(scan) == DIGIT |
9442cb0e | 2773 | ? isDIGIT(nextchr) : isDIGIT_LC(nextchr))) |
a0ed51b3 LW |
2774 | sayNO; |
2775 | nextchr = UCHARAT(++locinput); | |
2776 | break; | |
d6a28714 | 2777 | case NDIGITL: |
b8c5462f JH |
2778 | PL_reg_flags |= RF_tainted; |
2779 | /* FALL THROUGH */ | |
d6a28714 | 2780 | case NDIGIT: |
9442cb0e | 2781 | if (!nextchr && locinput >= PL_regeol) |
b8c5462f | 2782 | sayNO; |
1aa99e6b | 2783 | if (do_utf8) { |
fab1f349 | 2784 | LOAD_UTF8_CHARCLASS_DIGIT(); |
ffc61ed2 | 2785 | if (OP(scan) == NDIGIT |
3568d838 | 2786 | ? swash_fetch(PL_utf8_digit, (U8*)locinput, do_utf8) |
9442cb0e GS |
2787 | : isDIGIT_LC_utf8((U8*)locinput)) |
2788 | { | |
a0ed51b3 | 2789 | sayNO; |
9442cb0e | 2790 | } |
6f06b55f | 2791 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
2792 | nextchr = UCHARAT(locinput); |
2793 | break; | |
2794 | } | |
ffc61ed2 | 2795 | if (OP(scan) == NDIGIT |
9442cb0e | 2796 | ? isDIGIT(nextchr) : isDIGIT_LC(nextchr)) |
a0ed51b3 LW |
2797 | sayNO; |
2798 | nextchr = UCHARAT(++locinput); | |
2799 | break; | |
2800 | case CLUMP: | |
b7c83a7e | 2801 | if (locinput >= PL_regeol) |
a0ed51b3 | 2802 | sayNO; |
b7c83a7e | 2803 | if (do_utf8) { |
fab1f349 | 2804 | LOAD_UTF8_CHARCLASS_MARK(); |
b7c83a7e JH |
2805 | if (swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8)) |
2806 | sayNO; | |
2807 | locinput += PL_utf8skip[nextchr]; | |
2808 | while (locinput < PL_regeol && | |
2809 | swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8)) | |
2810 | locinput += UTF8SKIP(locinput); | |
2811 | if (locinput > PL_regeol) | |
2812 | sayNO; | |
eb08e2da JH |
2813 | } |
2814 | else | |
2815 | locinput++; | |
a0ed51b3 LW |
2816 | nextchr = UCHARAT(locinput); |
2817 | break; | |
c8756f30 | 2818 | case REFFL: |
3280af22 | 2819 | PL_reg_flags |= RF_tainted; |
c8756f30 | 2820 | /* FALL THROUGH */ |
c277df42 | 2821 | case REF: |
c8756f30 | 2822 | case REFF: |
c277df42 | 2823 | n = ARG(scan); /* which paren pair */ |
cf93c79d | 2824 | ln = PL_regstartp[n]; |
2c2d71f5 | 2825 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
eb160463 | 2826 | if ((I32)*PL_reglastparen < n || ln == -1) |
af3f8c16 | 2827 | sayNO; /* Do not match unless seen CLOSEn. */ |
cf93c79d | 2828 | if (ln == PL_regendp[n]) |
a0d0e21e | 2829 | break; |
a0ed51b3 | 2830 | |
cf93c79d | 2831 | s = PL_bostr + ln; |
1aa99e6b | 2832 | if (do_utf8 && OP(scan) != REF) { /* REF can do byte comparison */ |
a0ed51b3 | 2833 | char *l = locinput; |
8c18bf38 | 2834 | const char *e = PL_bostr + PL_regendp[n]; |
a0ed51b3 LW |
2835 | /* |
2836 | * Note that we can't do the "other character" lookup trick as | |
2837 | * in the 8-bit case (no pun intended) because in Unicode we | |
2838 | * have to map both upper and title case to lower case. | |
2839 | */ | |
2840 | if (OP(scan) == REFF) { | |
2841 | while (s < e) { | |
8c18bf38 AL |
2842 | STRLEN ulen1, ulen2; |
2843 | U8 tmpbuf1[UTF8_MAXBYTES_CASE+1]; | |
2844 | U8 tmpbuf2[UTF8_MAXBYTES_CASE+1]; | |
2845 | ||
a0ed51b3 LW |
2846 | if (l >= PL_regeol) |
2847 | sayNO; | |
a2a2844f JH |
2848 | toLOWER_utf8((U8*)s, tmpbuf1, &ulen1); |
2849 | toLOWER_utf8((U8*)l, tmpbuf2, &ulen2); | |
7114a2d2 | 2850 | if (ulen1 != ulen2 || memNE((char *)tmpbuf1, (char *)tmpbuf2, ulen1)) |
a0ed51b3 | 2851 | sayNO; |
a2a2844f JH |
2852 | s += ulen1; |
2853 | l += ulen2; | |
a0ed51b3 LW |
2854 | } |
2855 | } | |
2856 | locinput = l; | |
2857 | nextchr = UCHARAT(locinput); | |
2858 | break; | |
2859 | } | |
2860 | ||
a0d0e21e | 2861 | /* Inline the first character, for speed. */ |
76e3520e | 2862 | if (UCHARAT(s) != nextchr && |
c8756f30 AK |
2863 | (OP(scan) == REF || |
2864 | (UCHARAT(s) != ((OP(scan) == REFF | |
22c35a8c | 2865 | ? PL_fold : PL_fold_locale)[nextchr])))) |
4633a7c4 | 2866 | sayNO; |
cf93c79d | 2867 | ln = PL_regendp[n] - ln; |
3280af22 | 2868 | if (locinput + ln > PL_regeol) |
4633a7c4 | 2869 | sayNO; |
c8756f30 AK |
2870 | if (ln > 1 && (OP(scan) == REF |
2871 | ? memNE(s, locinput, ln) | |
2872 | : (OP(scan) == REFF | |
2873 | ? ibcmp(s, locinput, ln) | |
2874 | : ibcmp_locale(s, locinput, ln)))) | |
4633a7c4 | 2875 | sayNO; |
a0d0e21e | 2876 | locinput += ln; |
76e3520e | 2877 | nextchr = UCHARAT(locinput); |
a0d0e21e LW |
2878 | break; |
2879 | ||
2880 | case NOTHING: | |
c277df42 | 2881 | case TAIL: |
a0d0e21e LW |
2882 | break; |
2883 | case BACK: | |
2884 | break; | |
c277df42 IZ |
2885 | case EVAL: |
2886 | { | |
2887 | dSP; | |
533c011a | 2888 | OP_4tree *oop = PL_op; |
3280af22 | 2889 | COP *ocurcop = PL_curcop; |
d7afa7f5 | 2890 | PAD *old_comppad; |
c277df42 | 2891 | SV *ret; |
9b8ea7f3 | 2892 | struct regexp *oreg = PL_reg_re; |
9041c2e3 | 2893 | |
c277df42 | 2894 | n = ARG(scan); |
533c011a | 2895 | PL_op = (OP_4tree*)PL_regdata->data[n]; |
d7d93a81 | 2896 | DEBUG_r( PerlIO_printf(Perl_debug_log, " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) ); |
d7afa7f5 | 2897 | PAD_SAVE_LOCAL(old_comppad, (PAD*)PL_regdata->data[n + 2]); |
cf93c79d | 2898 | PL_regendp[0] = PL_reg_magic->mg_len = locinput - PL_bostr; |
c277df42 | 2899 | |
8e5e9ebe RGS |
2900 | { |
2901 | SV **before = SP; | |
2902 | CALLRUNOPS(aTHX); /* Scalar context. */ | |
2903 | SPAGAIN; | |
2904 | if (SP == before) | |
075aa684 | 2905 | ret = &PL_sv_undef; /* protect against empty (?{}) blocks. */ |
8e5e9ebe RGS |
2906 | else { |
2907 | ret = POPs; | |
2908 | PUTBACK; | |
2909 | } | |
2910 | } | |
2911 | ||
0f5d15d6 | 2912 | PL_op = oop; |
d7afa7f5 | 2913 | PAD_RESTORE_LOCAL(old_comppad); |
0f5d15d6 | 2914 | PL_curcop = ocurcop; |
c277df42 | 2915 | if (logical) { |
0f5d15d6 IZ |
2916 | if (logical == 2) { /* Postponed subexpression. */ |
2917 | regexp *re; | |
22c35a8c | 2918 | MAGIC *mg = Null(MAGIC*); |
0f5d15d6 | 2919 | re_cc_state state; |
0f5d15d6 | 2920 | CHECKPOINT cp, lastcp; |
5b7ea690 | 2921 | int toggleutf; |
5835a535 | 2922 | register SV *sv; |
0f5d15d6 | 2923 | |
5835a535 JH |
2924 | if(SvROK(ret) && SvSMAGICAL(sv = SvRV(ret))) |
2925 | mg = mg_find(sv, PERL_MAGIC_qr); | |
2926 | else if (SvSMAGICAL(ret)) { | |
2927 | if (SvGMAGICAL(ret)) | |
2928 | sv_unmagic(ret, PERL_MAGIC_qr); | |
2929 | else | |
2930 | mg = mg_find(ret, PERL_MAGIC_qr); | |
0f5d15d6 | 2931 | } |
5835a535 | 2932 | |
0f5d15d6 IZ |
2933 | if (mg) { |
2934 | re = (regexp *)mg->mg_obj; | |
df0003d4 | 2935 | (void)ReREFCNT_inc(re); |
0f5d15d6 IZ |
2936 | } |
2937 | else { | |
2938 | STRLEN len; | |
c06c673c | 2939 | const char *t = SvPV_const(ret, len); |
0f5d15d6 | 2940 | PMOP pm; |
8c18bf38 AL |
2941 | char * const oprecomp = PL_regprecomp; |
2942 | const I32 osize = PL_regsize; | |
2943 | const I32 onpar = PL_regnpar; | |
0f5d15d6 | 2944 | |
5fcd1c1b | 2945 | Zero(&pm, 1, PMOP); |
5b7ea690 | 2946 | if (DO_UTF8(ret)) pm.op_pmdynflags |= PMdf_DYN_UTF8; |
c06c673c | 2947 | re = CALLREGCOMP(aTHX_ (char*)t, (char*)t + len, &pm); |
9041c2e3 | 2948 | if (!(SvFLAGS(ret) |
5835a535 JH |
2949 | & (SVs_TEMP | SVs_PADTMP | SVf_READONLY |
2950 | | SVs_GMG))) | |
14befaf4 DM |
2951 | sv_magic(ret,(SV*)ReREFCNT_inc(re), |
2952 | PERL_MAGIC_qr,0,0); | |
0f5d15d6 IZ |
2953 | PL_regprecomp = oprecomp; |
2954 | PL_regsize = osize; | |
2955 | PL_regnpar = onpar; | |
2956 | } | |
2957 | DEBUG_r( | |
9041c2e3 | 2958 | PerlIO_printf(Perl_debug_log, |
5332c881 | 2959 | "Entering embedded \"%s%.60s%s%s\"\n", |
0f5d15d6 IZ |
2960 | PL_colors[0], |
2961 | re->precomp, | |
2962 | PL_colors[1], | |
2963 | (strlen(re->precomp) > 60 ? "..." : "")) | |
2964 | ); | |
2965 | state.node = next; | |
2966 | state.prev = PL_reg_call_cc; | |
2967 | state.cc = PL_regcc; | |
2968 | state.re = PL_reg_re; | |
2969 | ||
2ab05381 | 2970 | PL_regcc = 0; |
9041c2e3 | 2971 | |
0f5d15d6 | 2972 | cp = regcppush(0); /* Save *all* the positions. */ |
02db2b7b | 2973 | REGCP_SET(lastcp); |
0f5d15d6 IZ |
2974 | cache_re(re); |
2975 | state.ss = PL_savestack_ix; | |
2976 | *PL_reglastparen = 0; | |
a01268b5 | 2977 | *PL_reglastcloseparen = 0; |
0f5d15d6 IZ |
2978 | PL_reg_call_cc = &state; |
2979 | PL_reginput = locinput; | |
5b7ea690 JH |
2980 | toggleutf = ((PL_reg_flags & RF_utf8) != 0) ^ |
2981 | ((re->reganch & ROPT_UTF8) != 0); | |
2982 | if (toggleutf) PL_reg_flags ^= RF_utf8; | |
2c2d71f5 JH |
2983 | |
2984 | /* XXXX This is too dramatic a measure... */ | |
2985 | PL_reg_maxiter = 0; | |
2986 | ||
0f5d15d6 | 2987 | if (regmatch(re->program + 1)) { |
2c914db6 IZ |
2988 | /* Even though we succeeded, we need to restore |
2989 | global variables, since we may be wrapped inside | |
2990 | SUSPEND, thus the match may be not finished yet. */ | |
2991 | ||
2992 | /* XXXX Do this only if SUSPENDed? */ | |
2993 | PL_reg_call_cc = state.prev; | |
2994 | PL_regcc = state.cc; | |
2995 | PL_reg_re = state.re; | |
2996 | cache_re(PL_reg_re); | |
5b7ea690 | 2997 | if (toggleutf) PL_reg_flags ^= RF_utf8; |
2c914db6 IZ |
2998 | |
2999 | /* XXXX This is too dramatic a measure... */ | |
3000 | PL_reg_maxiter = 0; | |
3001 | ||
3002 | /* These are needed even if not SUSPEND. */ | |
0f5d15d6 IZ |
3003 | ReREFCNT_dec(re); |
3004 | regcpblow(cp); | |
3005 | sayYES; | |
3006 | } | |
0f5d15d6 | 3007 | ReREFCNT_dec(re); |
02db2b7b | 3008 | REGCP_UNWIND(lastcp); |
0f5d15d6 IZ |
3009 | regcppop(); |
3010 | PL_reg_call_cc = state.prev; | |
3011 | PL_regcc = state.cc; | |
3012 | PL_reg_re = state.re; | |
d3790889 | 3013 | cache_re(PL_reg_re); |
5b7ea690 | 3014 | if (toggleutf) PL_reg_flags ^= RF_utf8; |
2c2d71f5 JH |
3015 | |
3016 | /* XXXX This is too dramatic a measure... */ | |
3017 | PL_reg_maxiter = 0; | |
3018 | ||
8e514ae6 | 3019 | logical = 0; |
0f5d15d6 IZ |
3020 | sayNO; |
3021 | } | |
c277df42 | 3022 | sw = SvTRUE(ret); |
0f5d15d6 | 3023 | logical = 0; |
a0ed51b3 | 3024 | } |
9b8ea7f3 | 3025 | else { |
3280af22 | 3026 | sv_setsv(save_scalar(PL_replgv), ret); |
9b8ea7f3 JH |
3027 | cache_re(oreg); |
3028 | } | |
c277df42 IZ |
3029 | break; |
3030 | } | |
a0d0e21e | 3031 | case OPEN: |
c277df42 | 3032 | n = ARG(scan); /* which paren pair */ |
3280af22 NIS |
3033 | PL_reg_start_tmp[n] = locinput; |
3034 | if (n > PL_regsize) | |
3035 | PL_regsize = n; | |
a0d0e21e LW |
3036 | break; |
3037 | case CLOSE: | |
c277df42 | 3038 | n = ARG(scan); /* which paren pair */ |
cf93c79d IZ |
3039 | PL_regstartp[n] = PL_reg_start_tmp[n] - PL_bostr; |
3040 | PL_regendp[n] = locinput - PL_bostr; | |
eb160463 | 3041 | if (n > (I32)*PL_reglastparen) |
3280af22 | 3042 | *PL_reglastparen = n; |
a01268b5 | 3043 | *PL_reglastcloseparen = n; |
a0d0e21e | 3044 | break; |
c277df42 IZ |
3045 | case GROUPP: |
3046 | n = ARG(scan); /* which paren pair */ | |
eb160463 | 3047 | sw = ((I32)*PL_reglastparen >= n && PL_regendp[n] != -1); |
c277df42 IZ |
3048 | break; |
3049 | case IFTHEN: | |
2c2d71f5 | 3050 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
c277df42 IZ |
3051 | if (sw) |
3052 | next = NEXTOPER(NEXTOPER(scan)); | |
3053 | else { | |
3054 | next = scan + ARG(scan); | |
3055 | if (OP(next) == IFTHEN) /* Fake one. */ | |
3056 | next = NEXTOPER(NEXTOPER(next)); | |
3057 | } | |
3058 | break; | |
3059 | case LOGICAL: | |
0f5d15d6 | 3060 | logical = scan->flags; |
c277df42 | 3061 | break; |
2ab05381 IZ |
3062 | /******************************************************************* |
3063 | PL_regcc contains infoblock about the innermost (...)* loop, and | |
3064 | a pointer to the next outer infoblock. | |
3065 | ||
3066 | Here is how Y(A)*Z is processed (if it is compiled into CURLYX/WHILEM): | |
3067 | ||
3068 | 1) After matching X, regnode for CURLYX is processed; | |
3069 | ||
9041c2e3 | 3070 | 2) This regnode creates infoblock on the stack, and calls |
2ab05381 IZ |
3071 | regmatch() recursively with the starting point at WHILEM node; |
3072 | ||
3073 | 3) Each hit of WHILEM node tries to match A and Z (in the order | |
3074 | depending on the current iteration, min/max of {min,max} and | |
3075 | greediness). The information about where are nodes for "A" | |
3076 | and "Z" is read from the infoblock, as is info on how many times "A" | |
3077 | was already matched, and greediness. | |
3078 | ||
3079 | 4) After A matches, the same WHILEM node is hit again. | |
3080 | ||
3081 | 5) Each time WHILEM is hit, PL_regcc is the infoblock created by CURLYX | |
3082 | of the same pair. Thus when WHILEM tries to match Z, it temporarily | |
3083 | resets PL_regcc, since this Y(A)*Z can be a part of some other loop: | |
3084 | as in (Y(A)*Z)*. If Z matches, the automaton will hit the WHILEM node | |
3085 | of the external loop. | |
3086 | ||
3087 | Currently present infoblocks form a tree with a stem formed by PL_curcc | |
3088 | and whatever it mentions via ->next, and additional attached trees | |
3089 | corresponding to temporarily unset infoblocks as in "5" above. | |
3090 | ||
9041c2e3 | 3091 | In the following picture infoblocks for outer loop of |
2ab05381 IZ |
3092 | (Y(A)*?Z)*?T are denoted O, for inner I. NULL starting block |
3093 | is denoted by x. The matched string is YAAZYAZT. Temporarily postponed | |
3094 | infoblocks are drawn below the "reset" infoblock. | |
3095 | ||
3096 | In fact in the picture below we do not show failed matches for Z and T | |
3097 | by WHILEM blocks. [We illustrate minimal matches, since for them it is | |
3098 | more obvious *why* one needs to *temporary* unset infoblocks.] | |
3099 | ||
3100 | Matched REx position InfoBlocks Comment | |
3101 | (Y(A)*?Z)*?T x | |
3102 | Y(A)*?Z)*?T x <- O | |
3103 | Y (A)*?Z)*?T x <- O | |
3104 | Y A)*?Z)*?T x <- O <- I | |
3105 | YA )*?Z)*?T x <- O <- I | |
3106 | YA A)*?Z)*?T x <- O <- I | |
3107 | YAA )*?Z)*?T x <- O <- I | |
3108 | YAA Z)*?T x <- O # Temporary unset I | |
3109 | I | |
3110 | ||
3111 | YAAZ Y(A)*?Z)*?T x <- O | |
3112 | I | |
3113 | ||
3114 | YAAZY (A)*?Z)*?T x <- O | |
3115 | I | |
3116 | ||
3117 | YAAZY A)*?Z)*?T x <- O <- I | |
3118 | I | |
3119 | ||
3120 | YAAZYA )*?Z)*?T x <- O <- I | |
3121 | I | |
3122 | ||
3123 | YAAZYA Z)*?T x <- O # Temporary unset I | |
3124 | I,I | |
3125 | ||
3126 | YAAZYAZ )*?T x <- O | |
3127 | I,I | |
3128 | ||
3129 | YAAZYAZ T x # Temporary unset O | |
3130 | O | |
3131 | I,I | |
3132 | ||
3133 | YAAZYAZT x | |
3134 | O | |
3135 | I,I | |
3136 | *******************************************************************/ | |
a0d0e21e LW |
3137 | case CURLYX: { |
3138 | CURCUR cc; | |
3280af22 | 3139 | CHECKPOINT cp = PL_savestack_ix; |
cb434fcc IZ |
3140 | /* No need to save/restore up to this paren */ |
3141 | I32 parenfloor = scan->flags; | |
c277df42 IZ |
3142 | |
3143 | if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */ | |
3144 | next += ARG(next); | |
3280af22 NIS |
3145 | cc.oldcc = PL_regcc; |
3146 | PL_regcc = &cc; | |
cb434fcc IZ |
3147 | /* XXXX Probably it is better to teach regpush to support |
3148 | parenfloor > PL_regsize... */ | |
eb160463 | 3149 | if (parenfloor > (I32)*PL_reglastparen) |
cb434fcc IZ |
3150 | parenfloor = *PL_reglastparen; /* Pessimization... */ |
3151 | cc.parenfloor = parenfloor; | |
a0d0e21e LW |
3152 | cc.cur = -1; |
3153 | cc.min = ARG1(scan); | |
3154 | cc.max = ARG2(scan); | |
c277df42 | 3155 | cc.scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS; |
a0d0e21e LW |
3156 | cc.next = next; |
3157 | cc.minmod = minmod; | |
3158 | cc.lastloc = 0; | |
3280af22 | 3159 | PL_reginput = locinput; |
a0d0e21e LW |
3160 | n = regmatch(PREVOPER(next)); /* start on the WHILEM */ |
3161 | regcpblow(cp); | |
3280af22 | 3162 | PL_regcc = cc.oldcc; |
4633a7c4 | 3163 | saySAME(n); |
a0d0e21e LW |
3164 | } |
3165 | /* NOT REACHED */ | |
3166 | case WHILEM: { | |
3167 | /* | |
3168 | * This is really hard to understand, because after we match | |
3169 | * what we're trying to match, we must make sure the rest of | |
2c2d71f5 | 3170 | * the REx is going to match for sure, and to do that we have |
a0d0e21e LW |
3171 | * to go back UP the parse tree by recursing ever deeper. And |
3172 | * if it fails, we have to reset our parent's current state | |
3173 | * that we can try again after backing off. | |
3174 | */ | |
3175 | ||
c277df42 | 3176 | CHECKPOINT cp, lastcp; |
3280af22 | 3177 | CURCUR* cc = PL_regcc; |
c277df42 | 3178 | char *lastloc = cc->lastloc; /* Detection of 0-len. */ |
6e00f9c6 | 3179 | I32 cache_offset = 0, cache_bit = 0; |
c277df42 | 3180 | |
4633a7c4 | 3181 | n = cc->cur + 1; /* how many we know we matched */ |
3280af22 | 3182 | PL_reginput = locinput; |
a0d0e21e | 3183 | |
c277df42 | 3184 | DEBUG_r( |
9041c2e3 | 3185 | PerlIO_printf(Perl_debug_log, |
91f3b821 | 3186 | "%*s %ld out of %ld..%ld cc=%"UVxf"\n", |
3280af22 | 3187 | REPORT_CODE_OFF+PL_regindent*2, "", |
9041c2e3 | 3188 | (long)n, (long)cc->min, |
2797576d | 3189 | (long)cc->max, PTR2UV(cc)) |
c277df42 | 3190 | ); |
4633a7c4 | 3191 | |
a0d0e21e LW |
3192 | /* If degenerate scan matches "", assume scan done. */ |
3193 | ||
579cf2c3 | 3194 | if (locinput == cc->lastloc && n >= cc->min) { |
3280af22 | 3195 | PL_regcc = cc->oldcc; |
2ab05381 IZ |
3196 | if (PL_regcc) |
3197 | ln = PL_regcc->cur; | |
c277df42 | 3198 | DEBUG_r( |
c3464db5 DD |
3199 | PerlIO_printf(Perl_debug_log, |
3200 | "%*s empty match detected, try continuation...\n", | |
3280af22 | 3201 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 | 3202 | ); |
a0d0e21e | 3203 | if (regmatch(cc->next)) |
4633a7c4 | 3204 | sayYES; |
2ab05381 IZ |
3205 | if (PL_regcc) |
3206 | PL_regcc->cur = ln; | |
3280af22 | 3207 | PL_regcc = cc; |
4633a7c4 | 3208 | sayNO; |
a0d0e21e LW |
3209 | } |
3210 | ||
3211 | /* First just match a string of min scans. */ | |
3212 | ||
3213 | if (n < cc->min) { | |
3214 | cc->cur = n; | |
3215 | cc->lastloc = locinput; | |
4633a7c4 LW |
3216 | if (regmatch(cc->scan)) |
3217 | sayYES; | |
3218 | cc->cur = n - 1; | |
c277df42 | 3219 | cc->lastloc = lastloc; |
4633a7c4 | 3220 | sayNO; |
a0d0e21e LW |
3221 | } |
3222 | ||
2c2d71f5 JH |
3223 | if (scan->flags) { |
3224 | /* Check whether we already were at this position. | |
3225 | Postpone detection until we know the match is not | |
3226 | *that* much linear. */ | |
3227 | if (!PL_reg_maxiter) { | |
3228 | PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4); | |
3229 | PL_reg_leftiter = PL_reg_maxiter; | |
3230 | } | |
3231 | if (PL_reg_leftiter-- == 0) { | |
8c18bf38 | 3232 | const I32 size = (PL_reg_maxiter + 7 + POSCACHE_START)/8; |
2c2d71f5 | 3233 | if (PL_reg_poscache) { |
eb160463 | 3234 | if ((I32)PL_reg_poscache_size < size) { |
2c2d71f5 JH |
3235 | Renew(PL_reg_poscache, size, char); |
3236 | PL_reg_poscache_size = size; | |
3237 | } | |
3238 | Zero(PL_reg_poscache, size, char); | |
3239 | } | |
3240 | else { | |
3241 | PL_reg_poscache_size = size; | |
cd7a8267 | 3242 | Newxz(PL_reg_poscache, size, char); |
2c2d71f5 JH |
3243 | } |
3244 | DEBUG_r( | |
3245 | PerlIO_printf(Perl_debug_log, | |
3246 | "%sDetected a super-linear match, switching on caching%s...\n", | |
3247 | PL_colors[4], PL_colors[5]) | |
3248 | ); | |
3249 | } | |
3250 | if (PL_reg_leftiter < 0) { | |
6e00f9c6 | 3251 | cache_offset = locinput - PL_bostr; |
2c2d71f5 | 3252 | |
6e00f9c6 HS |
3253 | cache_offset = (scan->flags & 0xf) - 1 + POSCACHE_START |
3254 | + cache_offset * (scan->flags>>4); | |
3255 | cache_bit = cache_offset % 8; | |
3256 | cache_offset /= 8; | |
3257 | if (PL_reg_poscache[cache_offset] & (1<<cache_bit)) { | |
2c2d71f5 JH |
3258 | DEBUG_r( |
3259 | PerlIO_printf(Perl_debug_log, | |
3260 | "%*s already tried at this position...\n", | |
3261 | REPORT_CODE_OFF+PL_regindent*2, "") | |
3262 | ); | |
6e00f9c6 HS |
3263 | if (PL_reg_poscache[0] & (1<<POSCACHE_SUCCESS)) |
3264 | /* cache records success */ | |
91513146 JH |
3265 | sayYES; |
3266 | else | |
6e00f9c6 | 3267 | /* cache records failure */ |
91513146 | 3268 | sayNO_SILENT; |
2c2d71f5 | 3269 | } |
6e00f9c6 | 3270 | PL_reg_poscache[cache_offset] |= (1<<cache_bit); |
2c2d71f5 JH |
3271 | } |
3272 | } | |
3273 | ||
a0d0e21e LW |
3274 | /* Prefer next over scan for minimal matching. */ |
3275 | ||
3276 | if (cc->minmod) { | |
3280af22 | 3277 | PL_regcc = cc->oldcc; |
2ab05381 IZ |
3278 | if (PL_regcc) |
3279 | ln = PL_regcc->cur; | |
5f05dabc | 3280 | cp = regcppush(cc->parenfloor); |
02db2b7b | 3281 | REGCP_SET(lastcp); |
5f05dabc | 3282 | if (regmatch(cc->next)) { |
c277df42 | 3283 | regcpblow(cp); |
6e00f9c6 | 3284 | CACHEsayYES; /* All done. */ |
5f05dabc | 3285 | } |
02db2b7b | 3286 | REGCP_UNWIND(lastcp); |
5f05dabc | 3287 | regcppop(); |
2ab05381 IZ |
3288 | if (PL_regcc) |
3289 | PL_regcc->cur = ln; | |
3280af22 | 3290 | PL_regcc = cc; |
a0d0e21e | 3291 | |
c277df42 | 3292 | if (n >= cc->max) { /* Maximum greed exceeded? */ |
9041c2e3 | 3293 | if (ckWARN(WARN_REGEXP) && n >= REG_INFTY |
3280af22 NIS |
3294 | && !(PL_reg_flags & RF_warned)) { |
3295 | PL_reg_flags |= RF_warned; | |
9014280d | 3296 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s limit (%d) exceeded", |
2f3ca594 GS |
3297 | "Complex regular subexpression recursion", |
3298 | REG_INFTY - 1); | |
c277df42 | 3299 | } |
6e00f9c6 | 3300 | CACHEsayNO; |
c277df42 | 3301 | } |
a687059c | 3302 | |
c277df42 | 3303 | DEBUG_r( |
c3464db5 DD |
3304 | PerlIO_printf(Perl_debug_log, |
3305 | "%*s trying longer...\n", | |
3280af22 | 3306 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 | 3307 | ); |
a0d0e21e | 3308 | /* Try scanning more and see if it helps. */ |
3280af22 | 3309 | PL_reginput = locinput; |
a0d0e21e LW |
3310 | cc->cur = n; |
3311 | cc->lastloc = locinput; | |
5f05dabc | 3312 | cp = regcppush(cc->parenfloor); |
02db2b7b | 3313 | REGCP_SET(lastcp); |
5f05dabc | 3314 | if (regmatch(cc->scan)) { |
c277df42 | 3315 | regcpblow(cp); |
6e00f9c6 | 3316 | CACHEsayYES; |
5f05dabc | 3317 | } |
02db2b7b | 3318 | REGCP_UNWIND(lastcp); |
5f05dabc | 3319 | regcppop(); |
4633a7c4 | 3320 | cc->cur = n - 1; |
c277df42 | 3321 | cc->lastloc = lastloc; |
6e00f9c6 | 3322 | CACHEsayNO; |
a0d0e21e LW |
3323 | } |
3324 | ||
3325 | /* Prefer scan over next for maximal matching. */ | |
3326 | ||
3327 | if (n < cc->max) { /* More greed allowed? */ | |
5f05dabc | 3328 | cp = regcppush(cc->parenfloor); |
a0d0e21e LW |
3329 | cc->cur = n; |
3330 | cc->lastloc = locinput; | |
02db2b7b | 3331 | REGCP_SET(lastcp); |
5f05dabc | 3332 | if (regmatch(cc->scan)) { |
c277df42 | 3333 | regcpblow(cp); |
6e00f9c6 | 3334 | CACHEsayYES; |
5f05dabc | 3335 | } |
02db2b7b | 3336 | REGCP_UNWIND(lastcp); |
a0d0e21e | 3337 | regcppop(); /* Restore some previous $<digit>s? */ |
3280af22 | 3338 | PL_reginput = locinput; |
c277df42 | 3339 | DEBUG_r( |
c3464db5 DD |
3340 | PerlIO_printf(Perl_debug_log, |
3341 | "%*s failed, try continuation...\n", | |
3280af22 | 3342 | REPORT_CODE_OFF+PL_regindent*2, "") |
c277df42 IZ |
3343 | ); |
3344 | } | |
9041c2e3 | 3345 | if (ckWARN(WARN_REGEXP) && n >= REG_INFTY |
599cee73 | 3346 | && !(PL_reg_flags & RF_warned)) { |
3280af22 | 3347 | PL_reg_flags |= RF_warned; |
9014280d | 3348 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s limit (%d) exceeded", |
cb5d145d GS |
3349 | "Complex regular subexpression recursion", |
3350 | REG_INFTY - 1); | |
a0d0e21e LW |
3351 | } |
3352 | ||
3353 | /* Failed deeper matches of scan, so see if this one works. */ | |
3280af22 | 3354 | PL_regcc = cc->oldcc; |
2ab05381 IZ |
3355 | if (PL_regcc) |
3356 | ln = PL_regcc->cur; | |
a0d0e21e | 3357 | if (regmatch(cc->next)) |
6e00f9c6 | 3358 | CACHEsayYES; |
2ab05381 IZ |
3359 | if (PL_regcc) |
3360 | PL_regcc->cur = ln; | |
3280af22 | 3361 | PL_regcc = cc; |
4633a7c4 | 3362 | cc->cur = n - 1; |
c277df42 | 3363 | cc->lastloc = lastloc; |
6e00f9c6 | 3364 | CACHEsayNO; |
a0d0e21e LW |
3365 | } |
3366 | /* NOT REACHED */ | |
9041c2e3 | 3367 | case BRANCHJ: |
c277df42 IZ |
3368 | next = scan + ARG(scan); |
3369 | if (next == scan) | |
3370 | next = NULL; | |
3371 | inner = NEXTOPER(NEXTOPER(scan)); | |
3372 | goto do_branch; | |
9041c2e3 | 3373 | case BRANCH: |
c277df42 IZ |
3374 | inner = NEXTOPER(scan); |
3375 | do_branch: | |
3376 | { | |
c277df42 IZ |
3377 | c1 = OP(scan); |
3378 | if (OP(next) != c1) /* No choice. */ | |
3379 | next = inner; /* Avoid recursion. */ | |
a0d0e21e | 3380 | else { |
8c18bf38 | 3381 | const I32 lastparen = *PL_reglastparen; |
02db2b7b IZ |
3382 | I32 unwind1; |
3383 | re_unwind_branch_t *uw; | |
3384 | ||
3385 | /* Put unwinding data on stack */ | |
3386 | unwind1 = SSNEWt(1,re_unwind_branch_t); | |
3387 | uw = SSPTRt(unwind1,re_unwind_branch_t); | |
3388 | uw->prev = unwind; | |
3389 | unwind = unwind1; | |
3390 | uw->type = ((c1 == BRANCH) | |
3391 | ? RE_UNWIND_BRANCH | |
3392 | : RE_UNWIND_BRANCHJ); | |
3393 | uw->lastparen = lastparen; | |
3394 | uw->next = next; | |
3395 | uw->locinput = locinput; | |
3396 | uw->nextchr = nextchr; | |
3397 | #ifdef DEBUGGING | |
3398 | uw->regindent = ++PL_regindent; | |
3399 | #endif | |
c277df42 | 3400 | |
02db2b7b IZ |
3401 | REGCP_SET(uw->lastcp); |
3402 | ||
3403 | /* Now go into the first branch */ | |
3404 | next = inner; | |
a687059c | 3405 | } |
a0d0e21e LW |
3406 | } |
3407 | break; | |
3408 | case MINMOD: | |
3409 | minmod = 1; | |
3410 | break; | |
c277df42 IZ |
3411 | case CURLYM: |
3412 | { | |
00db4c45 | 3413 | I32 l = 0; |
c277df42 | 3414 | CHECKPOINT lastcp; |
9041c2e3 | 3415 | |
c277df42 | 3416 | /* We suppose that the next guy does not need |
b035a42e | 3417 | backtracking: in particular, it is of constant non-zero length, |
c277df42 IZ |
3418 | and has no parenths to influence future backrefs. */ |
3419 | ln = ARG1(scan); /* min to match */ | |
3420 | n = ARG2(scan); /* max to match */ | |
c277df42 IZ |
3421 | paren = scan->flags; |
3422 | if (paren) { | |
3280af22 NIS |
3423 | if (paren > PL_regsize) |
3424 | PL_regsize = paren; | |
eb160463 | 3425 | if (paren > (I32)*PL_reglastparen) |
3280af22 | 3426 | *PL_reglastparen = paren; |
c277df42 | 3427 | } |
dc45a647 | 3428 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
c277df42 IZ |
3429 | if (paren) |
3430 | scan += NEXT_OFF(scan); /* Skip former OPEN. */ | |
3280af22 | 3431 | PL_reginput = locinput; |
c277df42 IZ |
3432 | if (minmod) { |
3433 | minmod = 0; | |
3434 | if (ln && regrepeat_hard(scan, ln, &l) < ln) | |
3435 | sayNO; | |
3280af22 | 3436 | locinput = PL_reginput; |
cca55fe3 | 3437 | if (HAS_TEXT(next) || JUMPABLE(next)) { |
5f80c4cf JP |
3438 | regnode *text_node = next; |
3439 | ||
cca55fe3 | 3440 | if (! HAS_TEXT(text_node)) FIND_NEXT_IMPT(text_node); |
5f80c4cf | 3441 | |
cca55fe3 | 3442 | if (! HAS_TEXT(text_node)) c1 = c2 = -1000; |
5f80c4cf | 3443 | else { |
cca55fe3 | 3444 | if (PL_regkind[(U8)OP(text_node)] == REF) { |
c061b110 JH |
3445 | c1 = c2 = -1000; |
3446 | goto assume_ok_MM; | |
cca55fe3 JP |
3447 | } |
3448 | else { c1 = (U8)*STRING(text_node); } | |
af5decee | 3449 | if (OP(text_node) == EXACTF || OP(text_node) == REFF) |
5f80c4cf | 3450 | c2 = PL_fold[c1]; |
af5decee | 3451 | else if (OP(text_node) == EXACTFL || OP(text_node) == REFFL) |
5f80c4cf JP |
3452 | c2 = PL_fold_locale[c1]; |
3453 | else | |
3454 | c2 = c1; | |
3455 | } | |
a0ed51b3 LW |
3456 | } |
3457 | else | |
c277df42 | 3458 | c1 = c2 = -1000; |
cca55fe3 | 3459 | assume_ok_MM: |
02db2b7b | 3460 | REGCP_SET(lastcp); |
b035a42e | 3461 | while (n >= ln || (n == REG_INFTY && ln > 0)) { /* ln overflow ? */ |
c277df42 IZ |
3462 | /* If it could work, try it. */ |
3463 | if (c1 == -1000 || | |
3280af22 NIS |
3464 | UCHARAT(PL_reginput) == c1 || |
3465 | UCHARAT(PL_reginput) == c2) | |
c277df42 IZ |
3466 | { |
3467 | if (paren) { | |
f31a99c8 | 3468 | if (ln) { |
cf93c79d IZ |
3469 | PL_regstartp[paren] = |
3470 | HOPc(PL_reginput, -l) - PL_bostr; | |
3471 | PL_regendp[paren] = PL_reginput - PL_bostr; | |
a0ed51b3 LW |
3472 | } |
3473 | else | |
cf93c79d | 3474 | PL_regendp[paren] = -1; |
c277df42 IZ |
3475 | } |
3476 | if (regmatch(next)) | |
3477 | sayYES; | |
02db2b7b | 3478 | REGCP_UNWIND(lastcp); |
c277df42 IZ |
3479 | } |
3480 | /* Couldn't or didn't -- move forward. */ | |
3280af22 | 3481 | PL_reginput = locinput; |
c277df42 IZ |
3482 | if (regrepeat_hard(scan, 1, &l)) { |
3483 | ln++; | |
3280af22 | 3484 | locinput = PL_reginput; |
c277df42 IZ |
3485 | } |
3486 | else | |
3487 | sayNO; | |
3488 | } | |
a0ed51b3 LW |
3489 | } |
3490 | else { | |
c277df42 | 3491 | n = regrepeat_hard(scan, n, &l); |
3280af22 | 3492 | locinput = PL_reginput; |
c277df42 | 3493 | DEBUG_r( |
5c0ca799 | 3494 | PerlIO_printf(Perl_debug_log, |
faccc32b | 3495 | "%*s matched %"IVdf" times, len=%"IVdf"...\n", |
7b0972df | 3496 | (int)(REPORT_CODE_OFF+PL_regindent*2), "", |
faccc32b | 3497 | (IV) n, (IV)l) |
c277df42 IZ |
3498 | ); |
3499 | if (n >= ln) { | |
cca55fe3 | 3500 | if (HAS_TEXT(next) || JUMPABLE(next)) { |
5f80c4cf JP |
3501 | regnode *text_node = next; |
3502 | ||
cca55fe3 | 3503 | if (! HAS_TEXT(text_node)) FIND_NEXT_IMPT(text_node); |
5f80c4cf | 3504 | |
cca55fe3 | 3505 | if (! HAS_TEXT(text_node)) c1 = c2 = -1000; |
5f80c4cf | 3506 | else { |
cca55fe3 | 3507 | if (PL_regkind[(U8)OP(text_node)] == REF) { |
c061b110 JH |
3508 | c1 = c2 = -1000; |
3509 | goto assume_ok_REG; | |
cca55fe3 JP |
3510 | } |
3511 | else { c1 = (U8)*STRING(text_node); } | |
3512 | ||
af5decee | 3513 | if (OP(text_node) == EXACTF || OP(text_node) == REFF) |
5f80c4cf | 3514 | c2 = PL_fold[c1]; |
af5decee | 3515 | else if (OP(text_node) == EXACTFL || OP(text_node) == REFFL) |
5f80c4cf JP |
3516 | c2 = PL_fold_locale[c1]; |
3517 | else | |
3518 | c2 = c1; | |
3519 | } | |
a0ed51b3 LW |
3520 | } |
3521 | else | |
c277df42 IZ |
3522 | c1 = c2 = -1000; |
3523 | } | |
cca55fe3 | 3524 | assume_ok_REG: |
02db2b7b | 3525 | REGCP_SET(lastcp); |
c277df42 IZ |
3526 | while (n >= ln) { |
3527 | /* If it could work, try it. */ | |
3528 | if (c1 == -1000 || | |
3280af22 NIS |
3529 | UCHARAT(PL_reginput) == c1 || |
3530 | UCHARAT(PL_reginput) == c2) | |
a0ed51b3 LW |
3531 | { |
3532 | DEBUG_r( | |
c3464db5 | 3533 | PerlIO_printf(Perl_debug_log, |
7b0972df JH |
3534 | "%*s trying tail with n=%"IVdf"...\n", |
3535 | (int)(REPORT_CODE_OFF+PL_regindent*2), "", (IV)n) | |
a0ed51b3 LW |
3536 | ); |
3537 | if (paren) { | |
3538 | if (n) { | |
cf93c79d IZ |
3539 | PL_regstartp[paren] = HOPc(PL_reginput, -l) - PL_bostr; |
3540 | PL_regendp[paren] = PL_reginput - PL_bostr; | |
c277df42 | 3541 | } |
a0ed51b3 | 3542 | else |
cf93c79d | 3543 | PL_regendp[paren] = -1; |
c277df42 | 3544 | } |
a0ed51b3 LW |
3545 | if (regmatch(next)) |
3546 | sayYES; | |
02db2b7b | 3547 | REGCP_UNWIND(lastcp); |
a0ed51b3 | 3548 | } |
c277df42 IZ |
3549 | /* Couldn't or didn't -- back up. */ |
3550 | n--; | |
dfe13c55 | 3551 | locinput = HOPc(locinput, -l); |
3280af22 | 3552 | PL_reginput = locinput; |
c277df42 IZ |
3553 | } |
3554 | } | |
3555 | sayNO; | |
3556 | break; | |
3557 | } | |
3558 | case CURLYN: | |
3559 | paren = scan->flags; /* Which paren to set */ | |
3280af22 NIS |
3560 | if (paren > PL_regsize) |
3561 | PL_regsize = paren; | |
eb160463 | 3562 | if (paren > (I32)*PL_reglastparen) |
3280af22 | 3563 | *PL_reglastparen = paren; |
c277df42 IZ |
3564 | ln = ARG1(scan); /* min to match */ |
3565 | n = ARG2(scan); /* max to match */ | |
dc45a647 | 3566 | scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE); |
c277df42 | 3567 | goto repeat; |
a0d0e21e | 3568 | case CURLY: |
c277df42 | 3569 | paren = 0; |
a0d0e21e LW |
3570 | ln = ARG1(scan); /* min to match */ |
3571 | n = ARG2(scan); /* max to match */ | |
dc45a647 | 3572 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
a0d0e21e LW |
3573 | goto repeat; |
3574 | case STAR: | |
3575 | ln = 0; | |
c277df42 | 3576 | n = REG_INFTY; |
a0d0e21e | 3577 | scan = NEXTOPER(scan); |
c277df42 | 3578 | paren = 0; |
a0d0e21e LW |
3579 | goto repeat; |
3580 | case PLUS: | |
c277df42 IZ |
3581 | ln = 1; |
3582 | n = REG_INFTY; | |
3583 | scan = NEXTOPER(scan); | |
3584 | paren = 0; | |
3585 | repeat: | |
a0d0e21e LW |
3586 | /* |
3587 | * Lookahead to avoid useless match attempts | |
3588 | * when we know what character comes next. | |
3589 | */ | |
5f80c4cf JP |
3590 | |
3591 | /* | |
3592 | * Used to only do .*x and .*?x, but now it allows | |
3593 | * for )'s, ('s and (?{ ... })'s to be in the way | |
3594 | * of the quantifier and the EXACT-like node. -- japhy | |
3595 | */ | |
3596 | ||
cca55fe3 | 3597 | if (HAS_TEXT(next) || JUMPABLE(next)) { |
5f80c4cf JP |
3598 | U8 *s; |
3599 | regnode *text_node = next; | |
3600 | ||
cca55fe3 | 3601 | if (! HAS_TEXT(text_node)) FIND_NEXT_IMPT(text_node); |
5f80c4cf | 3602 | |
cca55fe3 | 3603 | if (! HAS_TEXT(text_node)) c1 = c2 = -1000; |
5f80c4cf | 3604 | else { |
cca55fe3 | 3605 | if (PL_regkind[(U8)OP(text_node)] == REF) { |
c061b110 JH |
3606 | c1 = c2 = -1000; |
3607 | goto assume_ok_easy; | |
cca55fe3 JP |
3608 | } |
3609 | else { s = (U8*)STRING(text_node); } | |
5f80c4cf JP |
3610 | |
3611 | if (!UTF) { | |
3612 | c2 = c1 = *s; | |
f65d3ee7 | 3613 | if (OP(text_node) == EXACTF || OP(text_node) == REFF) |
5f80c4cf | 3614 | c2 = PL_fold[c1]; |
f65d3ee7 | 3615 | else if (OP(text_node) == EXACTFL || OP(text_node) == REFFL) |
5f80c4cf | 3616 | c2 = PL_fold_locale[c1]; |
1aa99e6b | 3617 | } |
5f80c4cf | 3618 | else { /* UTF */ |
f65d3ee7 | 3619 | if (OP(text_node) == EXACTF || OP(text_node) == REFF) { |
a2a2844f | 3620 | STRLEN ulen1, ulen2; |
a2a469f9 JH |
3621 | U8 tmpbuf1[UTF8_MAXBYTES_CASE+1]; |
3622 | U8 tmpbuf2[UTF8_MAXBYTES_CASE+1]; | |
a2a2844f JH |
3623 | |
3624 | to_utf8_lower((U8*)s, tmpbuf1, &ulen1); | |
3625 | to_utf8_upper((U8*)s, tmpbuf2, &ulen2); | |
3626 | ||
a2a469f9 | 3627 | c1 = utf8n_to_uvuni(tmpbuf1, UTF8_MAXBYTES, 0, |
872c91ae JH |
3628 | ckWARN(WARN_UTF8) ? |
3629 | 0 : UTF8_ALLOW_ANY); | |
a2a469f9 | 3630 | c2 = utf8n_to_uvuni(tmpbuf2, UTF8_MAXBYTES, 0, |
872c91ae JH |
3631 | ckWARN(WARN_UTF8) ? |
3632 | 0 : UTF8_ALLOW_ANY); | |
5f80c4cf JP |
3633 | } |
3634 | else { | |
a2a469f9 | 3635 | c2 = c1 = utf8n_to_uvchr(s, UTF8_MAXBYTES, 0, |
872c91ae JH |
3636 | ckWARN(WARN_UTF8) ? |
3637 | 0 : UTF8_ALLOW_ANY); | |
5f80c4cf | 3638 | } |
1aa99e6b IH |
3639 | } |
3640 | } | |
bbce6d69 | 3641 | } |
a0d0e21e | 3642 | else |
bbce6d69 | 3643 | c1 = c2 = -1000; |
cca55fe3 | 3644 | assume_ok_easy: |
3280af22 | 3645 | PL_reginput = locinput; |
a0d0e21e | 3646 | if (minmod) { |
c277df42 | 3647 | CHECKPOINT lastcp; |
a0d0e21e LW |
3648 | minmod = 0; |
3649 | if (ln && regrepeat(scan, ln) < ln) | |
4633a7c4 | 3650 | sayNO; |
a0ed51b3 | 3651 | locinput = PL_reginput; |
02db2b7b | 3652 | REGCP_SET(lastcp); |
0fe9bf95 | 3653 | if (c1 != -1000) { |
1aa99e6b | 3654 | char *e; /* Should not check after this */ |
0fe9bf95 | 3655 | char *old = locinput; |
b2f2f093 | 3656 | int count = 0; |
0fe9bf95 | 3657 | |
1aa99e6b | 3658 | if (n == REG_INFTY) { |
0fe9bf95 | 3659 | e = PL_regeol - 1; |
1aa99e6b IH |
3660 | if (do_utf8) |
3661 | while (UTF8_IS_CONTINUATION(*(U8*)e)) | |
3662 | e--; | |
3663 | } | |
3664 | else if (do_utf8) { | |
3665 | int m = n - ln; | |
3666 | for (e = locinput; | |
3667 | m >0 && e + UTF8SKIP(e) <= PL_regeol; m--) | |
3668 | e += UTF8SKIP(e); | |
3669 | } | |
3670 | else { | |
3671 | e = locinput + n - ln; | |
3672 | if (e >= PL_regeol) | |
3673 | e = PL_regeol - 1; | |
3674 | } | |
0fe9bf95 IZ |
3675 | while (1) { |
3676 | /* Find place 'next' could work */ | |
1aa99e6b IH |
3677 | if (!do_utf8) { |
3678 | if (c1 == c2) { | |
a8e8ab15 JH |
3679 | while (locinput <= e && |
3680 | UCHARAT(locinput) != c1) | |
1aa99e6b IH |
3681 | locinput++; |
3682 | } else { | |
9041c2e3 | 3683 | while (locinput <= e |
a8e8ab15 JH |
3684 | && UCHARAT(locinput) != c1 |
3685 | && UCHARAT(locinput) != c2) | |
1aa99e6b IH |
3686 | locinput++; |
3687 | } | |
3688 | count = locinput - old; | |
3689 | } | |
3690 | else { | |
1aa99e6b | 3691 | if (c1 == c2) { |
8c18bf38 | 3692 | STRLEN len; |
872c91ae JH |
3693 | /* count initialised to |
3694 | * utf8_distance(old, locinput) */ | |
b2f2f093 | 3695 | while (locinput <= e && |
872c91ae | 3696 | utf8n_to_uvchr((U8*)locinput, |
a2a469f9 | 3697 | UTF8_MAXBYTES, &len, |
872c91ae | 3698 | ckWARN(WARN_UTF8) ? |
eb160463 | 3699 | 0 : UTF8_ALLOW_ANY) != (UV)c1) { |
1aa99e6b | 3700 | locinput += len; |
b2f2f093 JH |
3701 | count++; |
3702 | } | |
1aa99e6b | 3703 | } else { |
8c18bf38 | 3704 | STRLEN len; |
872c91ae JH |
3705 | /* count initialised to |
3706 | * utf8_distance(old, locinput) */ | |
b2f2f093 | 3707 | while (locinput <= e) { |
872c91ae | 3708 | UV c = utf8n_to_uvchr((U8*)locinput, |
a2a469f9 | 3709 | UTF8_MAXBYTES, &len, |
872c91ae JH |
3710 | ckWARN(WARN_UTF8) ? |
3711 | 0 : UTF8_ALLOW_ANY); | |
eb160463 | 3712 | if (c == (UV)c1 || c == (UV)c2) |
1aa99e6b | 3713 | break; |
b2f2f093 JH |
3714 | locinput += len; |
3715 | count++; | |
1aa99e6b IH |
3716 | } |
3717 | } | |
0fe9bf95 | 3718 | } |
9041c2e3 | 3719 | if (locinput > e) |
0fe9bf95 IZ |
3720 | sayNO; |
3721 | /* PL_reginput == old now */ | |
3722 | if (locinput != old) { | |
3723 | ln = 1; /* Did some */ | |
1aa99e6b | 3724 | if (regrepeat(scan, count) < count) |
0fe9bf95 IZ |
3725 | sayNO; |
3726 | } | |
3727 | /* PL_reginput == locinput now */ | |
29d1e993 | 3728 | TRYPAREN(paren, ln, locinput); |
0fe9bf95 | 3729 | PL_reginput = locinput; /* Could be reset... */ |
02db2b7b | 3730 | REGCP_UNWIND(lastcp); |
0fe9bf95 | 3731 | /* Couldn't or didn't -- move forward. */ |
1aa99e6b IH |
3732 | old = locinput; |
3733 | if (do_utf8) | |
3734 | locinput += UTF8SKIP(locinput); | |
3735 | else | |
3736 | locinput++; | |
b2f2f093 | 3737 | count = 1; |
0fe9bf95 IZ |
3738 | } |
3739 | } | |
3740 | else | |
c277df42 | 3741 | while (n >= ln || (n == REG_INFTY && ln > 0)) { /* ln overflow ? */ |
1aa99e6b IH |
3742 | UV c; |
3743 | if (c1 != -1000) { | |
3744 | if (do_utf8) | |
872c91ae | 3745 | c = utf8n_to_uvchr((U8*)PL_reginput, |
a2a469f9 | 3746 | UTF8_MAXBYTES, 0, |
872c91ae JH |
3747 | ckWARN(WARN_UTF8) ? |
3748 | 0 : UTF8_ALLOW_ANY); | |
1aa99e6b | 3749 | else |
9041c2e3 | 3750 | c = UCHARAT(PL_reginput); |
2390ecbc | 3751 | /* If it could work, try it. */ |
eb160463 | 3752 | if (c == (UV)c1 || c == (UV)c2) |
2390ecbc | 3753 | { |
5b7ea690 | 3754 | TRYPAREN(paren, ln, PL_reginput); |
2390ecbc PP |
3755 | REGCP_UNWIND(lastcp); |
3756 | } | |
1aa99e6b | 3757 | } |
a0d0e21e | 3758 | /* If it could work, try it. */ |
2390ecbc | 3759 | else if (c1 == -1000) |
bbce6d69 | 3760 | { |
5b7ea690 | 3761 | TRYPAREN(paren, ln, PL_reginput); |
02db2b7b | 3762 | REGCP_UNWIND(lastcp); |
bbce6d69 | 3763 | } |
c277df42 | 3764 | /* Couldn't or didn't -- move forward. */ |
a0ed51b3 | 3765 | PL_reginput = locinput; |
a0d0e21e LW |
3766 | if (regrepeat(scan, 1)) { |
3767 | ln++; | |
a0ed51b3 LW |
3768 | locinput = PL_reginput; |
3769 | } | |
3770 | else | |
4633a7c4 | 3771 | sayNO; |
a0d0e21e LW |
3772 | } |
3773 | } | |
3774 | else { | |
c277df42 | 3775 | CHECKPOINT lastcp; |
a0d0e21e | 3776 | n = regrepeat(scan, n); |
a0ed51b3 | 3777 | locinput = PL_reginput; |
22c35a8c | 3778 | if (ln < n && PL_regkind[(U8)OP(next)] == EOL && |
15272685 HS |
3779 | ((!PL_multiline && OP(next) != MEOL) || |
3780 | OP(next) == SEOL || OP(next) == EOS)) | |
3781 | { | |
a0d0e21e | 3782 | ln = n; /* why back off? */ |
1aeab75a GS |
3783 | /* ...because $ and \Z can match before *and* after |
3784 | newline at the end. Consider "\n\n" =~ /\n+\Z\n/. | |
3785 | We should back off by one in this case. */ | |
3786 | if (UCHARAT(PL_reginput - 1) == '\n' && OP(next) != EOS) | |
3787 | ln--; | |
3788 | } | |
02db2b7b | 3789 | REGCP_SET(lastcp); |
c277df42 | 3790 | if (paren) { |
8fa7f367 | 3791 | UV c = 0; |
c277df42 | 3792 | while (n >= ln) { |
1aa99e6b IH |
3793 | if (c1 != -1000) { |
3794 | if (do_utf8) | |
872c91ae | 3795 | c = utf8n_to_uvchr((U8*)PL_reginput, |
a2a469f9 | 3796 | UTF8_MAXBYTES, 0, |
872c91ae JH |
3797 | ckWARN(WARN_UTF8) ? |
3798 | 0 : UTF8_ALLOW_ANY); | |
1aa99e6b | 3799 | else |
9041c2e3 | 3800 | c = UCHARAT(PL_reginput); |
1aa99e6b | 3801 | } |
c277df42 | 3802 | /* If it could work, try it. */ |
eb160463 | 3803 | if (c1 == -1000 || c == (UV)c1 || c == (UV)c2) |
c277df42 | 3804 | { |
29d1e993 | 3805 | TRYPAREN(paren, n, PL_reginput); |
02db2b7b | 3806 | REGCP_UNWIND(lastcp); |
c277df42 IZ |
3807 | } |
3808 | /* Couldn't or didn't -- back up. */ | |
3809 | n--; | |
dfe13c55 | 3810 | PL_reginput = locinput = HOPc(locinput, -1); |
c277df42 | 3811 | } |
a0ed51b3 LW |
3812 | } |
3813 | else { | |
8fa7f367 | 3814 | UV c = 0; |
c277df42 | 3815 | while (n >= ln) { |
1aa99e6b IH |
3816 | if (c1 != -1000) { |
3817 | if (do_utf8) | |
872c91ae | 3818 | c = utf8n_to_uvchr((U8*)PL_reginput, |
a2a469f9 | 3819 | UTF8_MAXBYTES, 0, |
872c91ae JH |
3820 | ckWARN(WARN_UTF8) ? |
3821 | 0 : UTF8_ALLOW_ANY); | |
1aa99e6b | 3822 | else |
9041c2e3 | 3823 | c = UCHARAT(PL_reginput); |
1aa99e6b | 3824 | } |
c277df42 | 3825 | /* If it could work, try it. */ |
eb160463 | 3826 | if (c1 == -1000 || c == (UV)c1 || c == (UV)c2) |
c277df42 | 3827 | { |
29d1e993 | 3828 | TRYPAREN(paren, n, PL_reginput); |
02db2b7b | 3829 | REGCP_UNWIND(lastcp); |
c277df42 IZ |
3830 | } |
3831 | /* Couldn't or didn't -- back up. */ | |
3832 | n--; | |
dfe13c55 | 3833 | PL_reginput = locinput = HOPc(locinput, -1); |
bbce6d69 | 3834 | } |
a0d0e21e LW |
3835 | } |
3836 | } | |
4633a7c4 | 3837 | sayNO; |
c277df42 | 3838 | break; |
a0d0e21e | 3839 | case END: |
0f5d15d6 IZ |
3840 | if (PL_reg_call_cc) { |
3841 | re_cc_state *cur_call_cc = PL_reg_call_cc; | |
3842 | CURCUR *cctmp = PL_regcc; | |
3843 | regexp *re = PL_reg_re; | |
3844 | CHECKPOINT cp, lastcp; | |
3845 | ||
3846 | cp = regcppush(0); /* Save *all* the positions. */ | |
02db2b7b | 3847 | REGCP_SET(lastcp); |
0f5d15d6 IZ |
3848 | regcp_set_to(PL_reg_call_cc->ss); /* Restore parens of |
3849 | the caller. */ | |
3850 | PL_reginput = locinput; /* Make position available to | |
3851 | the callcc. */ | |
3852 | cache_re(PL_reg_call_cc->re); | |
3853 | PL_regcc = PL_reg_call_cc->cc; | |
3854 | PL_reg_call_cc = PL_reg_call_cc->prev; | |
3855 | if (regmatch(cur_call_cc->node)) { | |
3856 | PL_reg_call_cc = cur_call_cc; | |
3857 | regcpblow(cp); | |
3858 | sayYES; | |
3859 | } | |
02db2b7b | 3860 | REGCP_UNWIND(lastcp); |
0f5d15d6 IZ |
3861 | regcppop(); |
3862 | PL_reg_call_cc = cur_call_cc; | |
3863 | PL_regcc = cctmp; | |
3864 | PL_reg_re = re; | |
3865 | cache_re(re); | |
3866 | ||
3867 | DEBUG_r( | |
3868 | PerlIO_printf(Perl_debug_log, | |
3869 | "%*s continuation failed...\n", | |
3870 | REPORT_CODE_OFF+PL_regindent*2, "") | |
3871 | ); | |
7821416a | 3872 | sayNO_SILENT; |
0f5d15d6 | 3873 | } |
7821416a IZ |
3874 | if (locinput < PL_regtill) { |
3875 | DEBUG_r(PerlIO_printf(Perl_debug_log, | |
3876 | "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n", | |
3877 | PL_colors[4], | |
3878 | (long)(locinput - PL_reg_starttry), | |
3879 | (long)(PL_regtill - PL_reg_starttry), | |
3880 | PL_colors[5])); | |
3881 | sayNO_FINAL; /* Cannot match: too short. */ | |
3882 | } | |
3883 | PL_reginput = locinput; /* put where regtry can find it */ | |
3884 | sayYES_FINAL; /* Success! */ | |
7e5428c5 | 3885 | case SUCCEED: |
3280af22 | 3886 | PL_reginput = locinput; /* put where regtry can find it */ |
7821416a | 3887 | sayYES_LOUD; /* Success! */ |
c277df42 IZ |
3888 | case SUSPEND: |
3889 | n = 1; | |
9fe1d20c | 3890 | PL_reginput = locinput; |
9041c2e3 | 3891 | goto do_ifmatch; |
a0d0e21e | 3892 | case UNLESSM: |
c277df42 | 3893 | n = 0; |
a0ed51b3 | 3894 | if (scan->flags) { |
efb30f32 HS |
3895 | s = HOPBACKc(locinput, scan->flags); |
3896 | if (!s) | |
3897 | goto say_yes; | |
3898 | PL_reginput = s; | |
a0ed51b3 LW |
3899 | } |
3900 | else | |
3901 | PL_reginput = locinput; | |
c277df42 IZ |
3902 | goto do_ifmatch; |
3903 | case IFMATCH: | |
3904 | n = 1; | |
a0ed51b3 | 3905 | if (scan->flags) { |
efb30f32 HS |
3906 | s = HOPBACKc(locinput, scan->flags); |
3907 | if (!s) | |
3908 | goto say_no; | |
3909 | PL_reginput = s; | |
a0ed51b3 LW |
3910 | } |
3911 | else | |
3912 | PL_reginput = locinput; | |
3913 | ||
c277df42 | 3914 | do_ifmatch: |
c277df42 IZ |
3915 | inner = NEXTOPER(NEXTOPER(scan)); |
3916 | if (regmatch(inner) != n) { | |
3917 | say_no: | |
3918 | if (logical) { | |
3919 | logical = 0; | |
3920 | sw = 0; | |
3921 | goto do_longjump; | |
a0ed51b3 LW |
3922 | } |
3923 | else | |
c277df42 IZ |
3924 | sayNO; |
3925 | } | |
3926 | say_yes: | |
3927 | if (logical) { | |
3928 | logical = 0; | |
3929 | sw = 1; | |
3930 | } | |
fe44a5e8 | 3931 | if (OP(scan) == SUSPEND) { |
3280af22 | 3932 | locinput = PL_reginput; |
565764a8 | 3933 | nextchr = UCHARAT(locinput); |
fe44a5e8 | 3934 | } |
c277df42 IZ |
3935 | /* FALL THROUGH. */ |
3936 | case LONGJMP: | |
3937 | do_longjump: | |
3938 | next = scan + ARG(scan); | |
3939 | if (next == scan) | |
3940 | next = NULL; | |
a0d0e21e LW |
3941 | break; |
3942 | default: | |
b900a521 | 3943 | PerlIO_printf(Perl_error_log, "%"UVxf" %d\n", |
d7d93a81 | 3944 | PTR2UV(scan), OP(scan)); |
cea2e8a9 | 3945 | Perl_croak(aTHX_ "regexp memory corruption"); |
a687059c | 3946 | } |
02db2b7b | 3947 | reenter: |
a0d0e21e LW |
3948 | scan = next; |
3949 | } | |
a687059c | 3950 | |
a0d0e21e LW |
3951 | /* |
3952 | * We get here only if there's trouble -- normally "case END" is | |
3953 | * the terminating point. | |
3954 | */ | |
cea2e8a9 | 3955 | Perl_croak(aTHX_ "corrupted regexp pointers"); |
a0d0e21e | 3956 | /*NOTREACHED*/ |
4633a7c4 LW |
3957 | sayNO; |
3958 | ||
7821416a IZ |
3959 | yes_loud: |
3960 | DEBUG_r( | |
3961 | PerlIO_printf(Perl_debug_log, | |
3962 | "%*s %scould match...%s\n", | |
3963 | REPORT_CODE_OFF+PL_regindent*2, "", PL_colors[4],PL_colors[5]) | |
3964 | ); | |
3965 | goto yes; | |
3966 | yes_final: | |
3967 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n", | |
3968 | PL_colors[4],PL_colors[5])); | |
4633a7c4 LW |
3969 | yes: |
3970 | #ifdef DEBUGGING | |
3280af22 | 3971 | PL_regindent--; |
4633a7c4 | 3972 | #endif |
02db2b7b IZ |
3973 | |
3974 | #if 0 /* Breaks $^R */ | |
3975 | if (unwind) | |
3976 | regcpblow(firstcp); | |
3977 | #endif | |
4633a7c4 LW |
3978 | return 1; |
3979 | ||
3980 | no: | |
7821416a IZ |
3981 | DEBUG_r( |
3982 | PerlIO_printf(Perl_debug_log, | |
3983 | "%*s %sfailed...%s\n", | |
3984 | REPORT_CODE_OFF+PL_regindent*2, "",PL_colors[4],PL_colors[5]) | |
3985 | ); | |
3986 | goto do_no; | |
3987 | no_final: | |
3988 | do_no: | |
02db2b7b IZ |
3989 | if (unwind) { |
3990 | re_unwind_t *uw = SSPTRt(unwind,re_unwind_t); | |
3991 | ||
3992 | switch (uw->type) { | |
3993 | case RE_UNWIND_BRANCH: | |
3994 | case RE_UNWIND_BRANCHJ: | |
3995 | { | |
3996 | re_unwind_branch_t *uwb = &(uw->branch); | |
8c18bf38 | 3997 | const I32 lastparen = uwb->lastparen; |
9041c2e3 | 3998 | |
02db2b7b IZ |
3999 | REGCP_UNWIND(uwb->lastcp); |
4000 | for (n = *PL_reglastparen; n > lastparen; n--) | |
4001 | PL_regendp[n] = -1; | |
4002 | *PL_reglastparen = n; | |
4003 | scan = next = uwb->next; | |
9041c2e3 NIS |
4004 | if ( !scan || |
4005 | OP(scan) != (uwb->type == RE_UNWIND_BRANCH | |
02db2b7b IZ |
4006 | ? BRANCH : BRANCHJ) ) { /* Failure */ |
4007 | unwind = uwb->prev; | |
4008 | #ifdef DEBUGGING | |
4009 | PL_regindent--; | |
4010 | #endif | |
4011 | goto do_no; | |
4012 | } | |
4013 | /* Have more choice yet. Reuse the same uwb. */ | |
02db2b7b IZ |
4014 | if ((n = (uwb->type == RE_UNWIND_BRANCH |
4015 | ? NEXT_OFF(next) : ARG(next)))) | |
4016 | next += n; | |
4017 | else | |
4018 | next = NULL; /* XXXX Needn't unwinding in this case... */ | |
4019 | uwb->next = next; | |
4020 | next = NEXTOPER(scan); | |
4021 | if (uwb->type == RE_UNWIND_BRANCHJ) | |
4022 | next = NEXTOPER(next); | |
4023 | locinput = uwb->locinput; | |
4024 | nextchr = uwb->nextchr; | |
4025 | #ifdef DEBUGGING | |
4026 | PL_regindent = uwb->regindent; | |
4027 | #endif | |
4028 | ||
4029 | goto reenter; | |
4030 | } | |
4031 | /* NOT REACHED */ | |
4032 | default: | |
4033 | Perl_croak(aTHX_ "regexp unwind memory corruption"); | |
4034 | } | |
4035 | /* NOT REACHED */ | |
4036 | } | |
4633a7c4 | 4037 | #ifdef DEBUGGING |
3280af22 | 4038 | PL_regindent--; |
4633a7c4 | 4039 | #endif |
a0d0e21e | 4040 | return 0; |
a687059c LW |
4041 | } |
4042 | ||
4043 | /* | |
4044 | - regrepeat - repeatedly match something simple, report how many | |
4045 | */ | |
4046 | /* | |
4047 | * [This routine now assumes that it will only match on things of length 1. | |
4048 | * That was true before, but now we assume scan - reginput is the count, | |
a0ed51b3 | 4049 | * rather than incrementing count on every character. [Er, except utf8.]] |
a687059c | 4050 | */ |
76e3520e | 4051 | STATIC I32 |
8c18bf38 | 4052 | S_regrepeat(pTHX_ const regnode *p, I32 max) |
a687059c | 4053 | { |
a0d0e21e | 4054 | register char *scan; |
a0d0e21e | 4055 | register I32 c; |
3280af22 | 4056 | register char *loceol = PL_regeol; |
a0ed51b3 | 4057 | register I32 hardcount = 0; |
53c4c00c | 4058 | register bool do_utf8 = PL_reg_match_utf8; |
a0d0e21e | 4059 | |
3280af22 | 4060 | scan = PL_reginput; |
faf11cac HS |
4061 | if (max == REG_INFTY) |
4062 | max = I32_MAX; | |
4063 | else if (max < loceol - scan) | |
a0d0e21e | 4064 | loceol = scan + max; |
a0d0e21e | 4065 | switch (OP(p)) { |
22c35a8c | 4066 | case REG_ANY: |
1aa99e6b | 4067 | if (do_utf8) { |
ffc61ed2 | 4068 | loceol = PL_regeol; |
1aa99e6b | 4069 | while (scan < loceol && hardcount < max && *scan != '\n') { |
ffc61ed2 JH |
4070 | scan += UTF8SKIP(scan); |
4071 | hardcount++; | |
4072 | } | |
4073 | } else { | |
4074 | while (scan < loceol && *scan != '\n') | |
4075 | scan++; | |
a0ed51b3 LW |
4076 | } |
4077 | break; | |
ffc61ed2 | 4078 | case SANY: |
def8e4ea JH |
4079 | if (do_utf8) { |
4080 | loceol = PL_regeol; | |
a0804c9e | 4081 | while (scan < loceol && hardcount < max) { |
def8e4ea JH |
4082 | scan += UTF8SKIP(scan); |
4083 | hardcount++; | |
4084 | } | |
4085 | } | |
4086 | else | |
4087 | scan = loceol; | |
a0ed51b3 | 4088 | break; |
f33976b4 DB |
4089 | case CANY: |
4090 | scan = loceol; | |
4091 | break; | |
bbce6d69 | 4092 | case EXACT: /* length of string is 1 */ |
cd439c50 | 4093 | c = (U8)*STRING(p); |
bbce6d69 | 4094 | while (scan < loceol && UCHARAT(scan) == c) |
4095 | scan++; | |
4096 | break; | |
4097 | case EXACTF: /* length of string is 1 */ | |
cd439c50 | 4098 | c = (U8)*STRING(p); |
bbce6d69 | 4099 | while (scan < loceol && |
22c35a8c | 4100 | (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c])) |
bbce6d69 | 4101 | scan++; |
4102 | break; | |
4103 | case EXACTFL: /* length of string is 1 */ | |
3280af22 | 4104 | PL_reg_flags |= RF_tainted; |
cd439c50 | 4105 | c = (U8)*STRING(p); |
bbce6d69 | 4106 | while (scan < loceol && |
22c35a8c | 4107 | (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c])) |
a0d0e21e LW |
4108 | scan++; |
4109 | break; | |
4110 | case ANYOF: | |
ffc61ed2 JH |
4111 | if (do_utf8) { |
4112 | loceol = PL_regeol; | |
338501c1 JH |
4113 | while (hardcount < max && scan < loceol && |
4114 | reginclass(p, (U8*)scan, 0, do_utf8)) { | |
ffc61ed2 JH |
4115 | scan += UTF8SKIP(scan); |
4116 | hardcount++; | |
4117 | } | |
4118 | } else { | |
7d3e948e | 4119 | while (scan < loceol && REGINCLASS(p, (U8*)scan)) |
ffc61ed2 JH |
4120 | scan++; |
4121 | } | |
a0d0e21e LW |
4122 | break; |
4123 | case ALNUM: | |
1aa99e6b | 4124 | if (do_utf8) { |
ffc61ed2 | 4125 | loceol = PL_regeol; |
fab1f349 | 4126 | LOAD_UTF8_CHARCLASS_ALNUM(); |
1aa99e6b | 4127 | while (hardcount < max && scan < loceol && |
3568d838 | 4128 | swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) { |
ffc61ed2 JH |
4129 | scan += UTF8SKIP(scan); |
4130 | hardcount++; | |
4131 | } | |
4132 | } else { | |
4133 | while (scan < loceol && isALNUM(*scan)) | |
4134 | scan++; | |
a0ed51b3 LW |
4135 | } |
4136 | break; | |
bbce6d69 | 4137 | case ALNUML: |
3280af22 | 4138 | PL_reg_flags |= RF_tainted; |
1aa99e6b | 4139 | if (do_utf8) { |
ffc61ed2 | 4140 | loceol = PL_regeol; |
1aa99e6b IH |
4141 | while (hardcount < max && scan < loceol && |
4142 | isALNUM_LC_utf8((U8*)scan)) { | |
ffc61ed2 JH |
4143 | scan += UTF8SKIP(scan); |
4144 | hardcount++; | |
4145 | } | |
4146 | } else { | |
4147 | while (scan < loceol && isALNUM_LC(*scan)) | |
4148 | scan++; | |
a0ed51b3 LW |
4149 | } |
4150 | break; | |
a0d0e21e | 4151 | case NALNUM: |
1aa99e6b | 4152 | if (do_utf8) { |
ffc61ed2 | 4153 | loceol = PL_regeol; |
fab1f349 | 4154 | LOAD_UTF8_CHARCLASS_ALNUM(); |
1aa99e6b | 4155 | while (hardcount < max && scan < loceol && |
3568d838 | 4156 | !swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) { |
ffc61ed2 JH |
4157 | scan += UTF8SKIP(scan); |
4158 | hardcount++; | |
4159 | } | |
4160 | } else { | |
4161 | while (scan < loceol && !isALNUM(*scan)) | |
4162 | scan++; | |
a0ed51b3 LW |
4163 | } |
4164 | break; | |
bbce6d69 | 4165 | case NALNUML: |
3280af22 | 4166 | PL_reg_flags |= RF_tainted; |
1aa99e6b | 4167 | if (do_utf8) { |
ffc61ed2 | 4168 | loceol = PL_regeol; |
1aa99e6b IH |
4169 | while (hardcount < max && scan < loceol && |
4170 | !isALNUM_LC_utf8((U8*)scan)) { | |
ffc61ed2 JH |
4171 | scan += UTF8SKIP(scan); |
4172 | hardcount++; | |
4173 | } | |
4174 | } else { | |
4175 | while (scan < loceol && !isALNUM_LC(*scan)) | |
4176 | scan++; | |
a0ed51b3 LW |
4177 | } |
4178 | break; | |
a0d0e21e | 4179 | case SPACE: |
1aa99e6b | 4180 | if (do_utf8) { |
ffc61ed2 | 4181 | loceol = PL_regeol; |
fab1f349 | 4182 | LOAD_UTF8_CHARCLASS_SPACE(); |
1aa99e6b | 4183 | while (hardcount < max && scan < loceol && |
3568d838 JH |
4184 | (*scan == ' ' || |
4185 | swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) { | |
ffc61ed2 JH |
4186 | scan += UTF8SKIP(scan); |
4187 | hardcount++; | |
4188 | } | |
4189 | } else { | |
4190 | while (scan < loceol && isSPACE(*scan)) | |
4191 | scan++; | |
a0ed51b3 LW |
4192 | } |
4193 | break; | |
bbce6d69 | 4194 | case SPACEL: |
3280af22 | 4195 | PL_reg_flags |= RF_tainted; |
1aa99e6b | 4196 | if (do_utf8) { |
ffc61ed2 | 4197 | loceol = PL_regeol; |
1aa99e6b | 4198 | while (hardcount < max && scan < loceol && |
ffc61ed2 JH |
4199 | (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
4200 | scan += UTF8SKIP(scan); | |
4201 | hardcount++; | |
4202 | } | |
4203 | } else { | |
4204 | while (scan < loceol && isSPACE_LC(*scan)) | |
4205 | scan++; | |
a0ed51b3 LW |
4206 | } |
4207 | break; | |
a0d0e21e | 4208 | case NSPACE: |
1aa99e6b | 4209 | if (do_utf8) { |
ffc61ed2 | 4210 | loceol = PL_regeol; |
fab1f349 | 4211 | LOAD_UTF8_CHARCLASS_SPACE(); |
1aa99e6b | 4212 | while (hardcount < max && scan < loceol && |
3568d838 JH |
4213 | !(*scan == ' ' || |
4214 | swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) { | |
ffc61ed2 JH |
4215 | scan += UTF8SKIP(scan); |
4216 | hardcount++; | |
4217 | } | |
4218 | } else { | |
4219 | while (scan < loceol && !isSPACE(*scan)) | |
4220 | scan++; | |
4221 | break; | |
a0ed51b3 | 4222 | } |
bbce6d69 | 4223 | case NSPACEL: |
3280af22 | 4224 | PL_reg_flags |= RF_tainted; |
1aa99e6b | 4225 | if (do_utf8) { |
ffc61ed2 | 4226 | loceol = PL_regeol; |
1aa99e6b | 4227 | while (hardcount < max && scan < loceol && |
ffc61ed2 JH |
4228 | !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
4229 | scan += UTF8SKIP(scan); | |
4230 | hardcount++; | |
4231 | } | |
4232 | } else { | |
4233 | while (scan < loceol && !isSPACE_LC(*scan)) | |
4234 | scan++; | |
a0ed51b3 LW |
4235 | } |
4236 | break; | |
a0d0e21e | 4237 | case DIGIT: |
1aa99e6b | 4238 | if (do_utf8) { |
ffc61ed2 | 4239 | loceol = PL_regeol; |
fab1f349 | 4240 | LOAD_UTF8_CHARCLASS_DIGIT(); |
1aa99e6b | 4241 | while (hardcount < max && scan < loceol && |
3568d838 | 4242 | swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) { |
ffc61ed2 JH |
4243 | scan += UTF8SKIP(scan); |
4244 | hardcount++; | |
4245 | } | |
4246 | } else { | |
4247 | while (scan < loceol && isDIGIT(*scan)) | |
4248 | scan++; | |
a0ed51b3 LW |
4249 | } |
4250 | break; | |
a0d0e21e | 4251 | case NDIGIT: |
1aa99e6b | 4252 | if (do_utf8) { |
ffc61ed2 | 4253 | loceol = PL_regeol; |
fab1f349 | 4254 | LOAD_UTF8_CHARCLASS_DIGIT(); |
1aa99e6b | 4255 | while (hardcount < max && scan < loceol && |
3568d838 | 4256 | !swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) { |
ffc61ed2 JH |
4257 | scan += UTF8SKIP(scan); |
4258 | hardcount++; | |
4259 | } | |
4260 | } else { | |
4261 | while (scan < loceol && !isDIGIT(*scan)) | |
4262 | scan++; | |
a0ed51b3 LW |
4263 | } |
4264 | break; | |
a0d0e21e LW |
4265 | default: /* Called on something of 0 width. */ |
4266 | break; /* So match right here or not at all. */ | |
4267 | } | |
a687059c | 4268 | |
a0ed51b3 LW |
4269 | if (hardcount) |
4270 | c = hardcount; | |
4271 | else | |
4272 | c = scan - PL_reginput; | |
3280af22 | 4273 | PL_reginput = scan; |
a687059c | 4274 | |
9041c2e3 | 4275 | DEBUG_r( |
c277df42 IZ |
4276 | { |
4277 | SV *prop = sv_newmortal(); | |
4278 | ||
47a91a97 | 4279 | regprop(prop, (regnode *)p); |
9041c2e3 NIS |
4280 | PerlIO_printf(Perl_debug_log, |
4281 | "%*s %s can match %"IVdf" times out of %"IVdf"...\n", | |
fdac8c4b | 4282 | REPORT_CODE_OFF+1, "", SvPVX_const(prop),(IV)c,(IV)max); |
c277df42 | 4283 | }); |
9041c2e3 | 4284 | |
a0d0e21e | 4285 | return(c); |
a687059c LW |
4286 | } |
4287 | ||
4288 | /* | |
c277df42 | 4289 | - regrepeat_hard - repeatedly match something, report total lenth and length |
9041c2e3 | 4290 | * |
b035a42e | 4291 | * The repeater is supposed to have constant non-zero length. |
c277df42 IZ |
4292 | */ |
4293 | ||
76e3520e | 4294 | STATIC I32 |
cea2e8a9 | 4295 | S_regrepeat_hard(pTHX_ regnode *p, I32 max, I32 *lp) |
c277df42 | 4296 | { |
b7953727 | 4297 | register char *scan = Nullch; |
c277df42 | 4298 | register char *start; |
3280af22 | 4299 | register char *loceol = PL_regeol; |
a0ed51b3 | 4300 | I32 l = 0; |
708e3b05 | 4301 | I32 count = 0, res = 1; |
a0ed51b3 LW |
4302 | |
4303 | if (!max) | |
4304 | return 0; | |
c277df42 | 4305 | |
3280af22 | 4306 | start = PL_reginput; |
53c4c00c | 4307 | if (PL_reg_match_utf8) { |
708e3b05 | 4308 | while (PL_reginput < loceol && (scan = PL_reginput, res = regmatch(p))) { |
a0ed51b3 LW |
4309 | if (!count++) { |
4310 | l = 0; | |
4311 | while (start < PL_reginput) { | |
4312 | l++; | |
4313 | start += UTF8SKIP(start); | |
4314 | } | |
4315 | *lp = l; | |
4316 | if (l == 0) | |
4317 | return max; | |
4318 | } | |
4319 | if (count == max) | |
4320 | return count; | |
4321 | } | |
4322 | } | |
4323 | else { | |
708e3b05 | 4324 | while (PL_reginput < loceol && (scan = PL_reginput, res = regmatch(p))) { |
a0ed51b3 LW |
4325 | if (!count++) { |
4326 | *lp = l = PL_reginput - start; | |
4327 | if (max != REG_INFTY && l*max < loceol - scan) | |
4328 | loceol = scan + l*max; | |
4329 | if (l == 0) | |
4330 | return max; | |
c277df42 IZ |
4331 | } |
4332 | } | |
4333 | } | |
708e3b05 | 4334 | if (!res) |
3280af22 | 4335 | PL_reginput = scan; |
9041c2e3 | 4336 | |
a0ed51b3 | 4337 | return count; |
c277df42 IZ |
4338 | } |
4339 | ||
4340 | /* | |
ffc61ed2 JH |
4341 | - regclass_swash - prepare the utf8 swash |
4342 | */ | |
4343 | ||
4344 | SV * | |
9e55ce06 | 4345 | Perl_regclass_swash(pTHX_ register regnode* node, bool doinit, SV** listsvp, SV **altsvp) |
ffc61ed2 | 4346 | { |
9e55ce06 JH |
4347 | SV *sw = NULL; |
4348 | SV *si = NULL; | |
4349 | SV *alt = NULL; | |
ffc61ed2 JH |
4350 | |
4351 | if (PL_regdata && PL_regdata->count) { | |
8c18bf38 | 4352 | const U32 n = ARG(node); |
ffc61ed2 JH |
4353 | |
4354 | if (PL_regdata->what[n] == 's') { | |
c6d79d47 AL |
4355 | SV * const rv = (SV*)PL_regdata->data[n]; |
4356 | AV * const av = (AV*)SvRV((SV*)rv); | |
339a2a6a | 4357 | SV **const ary = AvARRAY(av); |
9e55ce06 | 4358 | SV **a, **b; |
9041c2e3 | 4359 | |
9e55ce06 JH |
4360 | /* See the end of regcomp.c:S_reglass() for |
4361 | * documentation of these array elements. */ | |
4362 | ||
b11f357e JH |
4363 | si = *ary; |
4364 | a = SvTYPE(ary[1]) == SVt_RV ? &ary[1] : 0; | |
4365 | b = SvTYPE(ary[2]) == SVt_PVAV ? &ary[2] : 0; | |
4366 | ||
ffc61ed2 JH |
4367 | if (a) |
4368 | sw = *a; | |
4369 | else if (si && doinit) { | |
4370 | sw = swash_init("utf8", "", si, 1, 0); | |
4371 | (void)av_store(av, 1, sw); | |
4372 | } | |
9e55ce06 JH |
4373 | if (b) |
4374 | alt = *b; | |
ffc61ed2 JH |
4375 | } |
4376 | } | |
4377 | ||
9e55ce06 JH |
4378 | if (listsvp) |
4379 | *listsvp = si; | |
4380 | if (altsvp) | |
4381 | *altsvp = alt; | |
ffc61ed2 JH |
4382 | |
4383 | return sw; | |
4384 | } | |
4385 | ||
4386 | /* | |
ba7b4546 | 4387 | - reginclass - determine if a character falls into a character class |
832705d4 JH |
4388 | |
4389 | The n is the ANYOF regnode, the p is the target string, lenp | |
4390 | is pointer to the maximum length of how far to go in the p | |
4391 | (if the lenp is zero, UTF8SKIP(p) is used), | |
4392 | do_utf8 tells whether the target string is in UTF-8. | |
4393 | ||
bbce6d69 | 4394 | */ |
4395 | ||
76e3520e | 4396 | STATIC bool |
8c18bf38 | 4397 | S_reginclass(pTHX_ register const regnode *n, register const U8* p, STRLEN* lenp, register bool do_utf8) |
bbce6d69 | 4398 | { |
8c18bf38 | 4399 | const char flags = ANYOF_FLAGS(n); |
bbce6d69 | 4400 | bool match = FALSE; |
cc07378b | 4401 | UV c = *p; |
ae9ddab8 | 4402 | STRLEN len = 0; |
9e55ce06 | 4403 | STRLEN plen; |
1aa99e6b | 4404 | |
ae9ddab8 | 4405 | if (do_utf8 && !UTF8_IS_INVARIANT(c)) |
47a91a97 | 4406 | c = utf8n_to_uvchr((U8 *)p, UTF8_MAXBYTES, &len, |
ae9ddab8 | 4407 | ckWARN(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY); |
bbce6d69 | 4408 | |
0f0076b4 | 4409 | plen = lenp ? *lenp : UNISKIP(NATIVE_TO_UNI(c)); |
ffc61ed2 | 4410 | if (do_utf8 || (flags & ANYOF_UNICODE)) { |
9e55ce06 JH |
4411 | if (lenp) |
4412 | *lenp = 0; | |
ffc61ed2 | 4413 | if (do_utf8 && !ANYOF_RUNTIME(n)) { |
ffc61ed2 JH |
4414 | if (len != (STRLEN)-1 && c < 256 && ANYOF_BITMAP_TEST(n, c)) |
4415 | match = TRUE; | |
bbce6d69 | 4416 | } |
3568d838 | 4417 | if (!match && do_utf8 && (flags & ANYOF_UNICODE_ALL) && c >= 256) |
1aa99e6b | 4418 | match = TRUE; |
ffc61ed2 | 4419 | if (!match) { |
9e55ce06 | 4420 | AV *av; |
47a91a97 | 4421 | SV * const sw = regclass_swash((regnode *)n, TRUE, 0, (SV**)&av); |
ffc61ed2 JH |
4422 | |
4423 | if (sw) { | |
47a91a97 | 4424 | if (swash_fetch(sw, (U8 *)p, do_utf8)) |
ffc61ed2 JH |
4425 | match = TRUE; |
4426 | else if (flags & ANYOF_FOLD) { | |
9e55ce06 JH |
4427 | if (!match && lenp && av) { |
4428 | I32 i; | |
9e55ce06 | 4429 | for (i = 0; i <= av_len(av); i++) { |
c6d79d47 | 4430 | SV* const sv = *av_fetch(av, i, FALSE); |
9e55ce06 | 4431 | STRLEN len; |
c6d79d47 | 4432 | const char * const s = SvPV_const(sv, len); |
9e55ce06 | 4433 | |
061b10df | 4434 | if (len <= plen && memEQ(s, (char*)p, len)) { |
9e55ce06 JH |
4435 | *lenp = len; |
4436 | match = TRUE; | |
4437 | break; | |
4438 | } | |
4439 | } | |
4440 | } | |
4441 | if (!match) { | |
a2a469f9 | 4442 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1]; |
4a623e43 JH |
4443 | STRLEN tmplen; |
4444 | ||
47a91a97 | 4445 | to_utf8_fold((U8 *)p, tmpbuf, &tmplen); |
9e55ce06 JH |
4446 | if (swash_fetch(sw, tmpbuf, do_utf8)) |
4447 | match = TRUE; | |
4448 | } | |
ffc61ed2 JH |
4449 | } |
4450 | } | |
bbce6d69 | 4451 | } |
9e55ce06 | 4452 | if (match && lenp && *lenp == 0) |
0f0076b4 | 4453 | *lenp = UNISKIP(NATIVE_TO_UNI(c)); |
bbce6d69 | 4454 | } |
1aa99e6b | 4455 | if (!match && c < 256) { |
ffc61ed2 JH |
4456 | if (ANYOF_BITMAP_TEST(n, c)) |
4457 | match = TRUE; | |
4458 | else if (flags & ANYOF_FOLD) { | |
eb160463 | 4459 | U8 f; |
a0ed51b3 | 4460 | |
ffc61ed2 JH |
4461 | if (flags & ANYOF_LOCALE) { |
4462 | PL_reg_flags |= RF_tainted; | |
4463 | f = PL_fold_locale[c]; | |
4464 | } | |
4465 | else | |
4466 | f = PL_fold[c]; | |
4467 | if (f != c && ANYOF_BITMAP_TEST(n, f)) | |
4468 | match = TRUE; | |
4469 | } | |
4470 | ||
4471 | if (!match && (flags & ANYOF_CLASS)) { | |
a0ed51b3 | 4472 | PL_reg_flags |= RF_tainted; |
ffc61ed2 JH |
4473 | if ( |
4474 | (ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) || | |
4475 | (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) || | |
4476 | (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) || | |
4477 | (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) || | |
4478 | (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) || | |
4479 | (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) || | |
4480 | (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) || | |
4481 | (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) || | |
4482 | (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) || | |
4483 | (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) || | |
4484 | (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII(c)) || | |
4485 | (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII(c)) || | |
4486 | (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) || | |
4487 | (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) || | |
4488 | (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) || | |
4489 | (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) || | |
4490 | (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) || | |
4491 | (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) || | |
4492 | (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) || | |
4493 | (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) || | |
4494 | (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) || | |
4495 | (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) || | |
4496 | (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) || | |
4497 | (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) || | |
4498 | (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) || | |
4499 | (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) || | |
4500 | (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) || | |
4501 | (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) || | |
4502 | (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK(c)) || | |
4503 | (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK(c)) | |
4504 | ) /* How's that for a conditional? */ | |
4505 | { | |
4506 | match = TRUE; | |
4507 | } | |
a0ed51b3 | 4508 | } |
a0ed51b3 LW |
4509 | } |
4510 | ||
a0ed51b3 LW |
4511 | return (flags & ANYOF_INVERT) ? !match : match; |
4512 | } | |
161b471a | 4513 | |
dfe13c55 | 4514 | STATIC U8 * |
cea2e8a9 | 4515 | S_reghop(pTHX_ U8 *s, I32 off) |
9041c2e3 | 4516 | { |
1aa99e6b IH |
4517 | return S_reghop3(aTHX_ s, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)); |
4518 | } | |
4519 | ||
4520 | STATIC U8 * | |
4521 | S_reghop3(pTHX_ U8 *s, I32 off, U8* lim) | |
9041c2e3 | 4522 | { |
a0ed51b3 | 4523 | if (off >= 0) { |
1aa99e6b | 4524 | while (off-- && s < lim) { |
ffc61ed2 | 4525 | /* XXX could check well-formedness here */ |
a0ed51b3 | 4526 | s += UTF8SKIP(s); |
ffc61ed2 | 4527 | } |
a0ed51b3 LW |
4528 | } |
4529 | else { | |
4530 | while (off++) { | |
1aa99e6b | 4531 | if (s > lim) { |
a0ed51b3 | 4532 | s--; |
ffc61ed2 | 4533 | if (UTF8_IS_CONTINUED(*s)) { |
1aa99e6b | 4534 | while (s > (U8*)lim && UTF8_IS_CONTINUATION(*s)) |
a0ed51b3 | 4535 | s--; |
ffc61ed2 JH |
4536 | } |
4537 | /* XXX could check well-formedness here */ | |
a0ed51b3 LW |
4538 | } |
4539 | } | |
4540 | } | |
4541 | return s; | |
4542 | } | |
161b471a | 4543 | |
dfe13c55 | 4544 | STATIC U8 * |
1aa99e6b | 4545 | S_reghopmaybe(pTHX_ U8 *s, I32 off) |
9041c2e3 | 4546 | { |
1aa99e6b IH |
4547 | return S_reghopmaybe3(aTHX_ s, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)); |
4548 | } | |
4549 | ||
4550 | STATIC U8 * | |
4551 | S_reghopmaybe3(pTHX_ U8* s, I32 off, U8* lim) | |
a0ed51b3 LW |
4552 | { |
4553 | if (off >= 0) { | |
1aa99e6b | 4554 | while (off-- && s < lim) { |
ffc61ed2 | 4555 | /* XXX could check well-formedness here */ |
a0ed51b3 | 4556 | s += UTF8SKIP(s); |
ffc61ed2 | 4557 | } |
a0ed51b3 LW |
4558 | if (off >= 0) |
4559 | return 0; | |
4560 | } | |
4561 | else { | |
4562 | while (off++) { | |
1aa99e6b | 4563 | if (s > lim) { |
a0ed51b3 | 4564 | s--; |
ffc61ed2 | 4565 | if (UTF8_IS_CONTINUED(*s)) { |
1aa99e6b | 4566 | while (s > (U8*)lim && UTF8_IS_CONTINUATION(*s)) |
a0ed51b3 | 4567 | s--; |
ffc61ed2 JH |
4568 | } |
4569 | /* XXX could check well-formedness here */ | |
a0ed51b3 LW |
4570 | } |
4571 | else | |
4572 | break; | |
4573 | } | |
4574 | if (off <= 0) | |
4575 | return 0; | |
4576 | } | |
4577 | return s; | |
4578 | } | |
51371543 | 4579 | |
51371543 | 4580 | static void |
acfe0abc | 4581 | restore_pos(pTHX_ void *arg) |
51371543 | 4582 | { |
a2592645 | 4583 | PERL_UNUSED_ARG(arg); |
51371543 GS |
4584 | if (PL_reg_eval_set) { |
4585 | if (PL_reg_oldsaved) { | |
4586 | PL_reg_re->subbeg = PL_reg_oldsaved; | |
4587 | PL_reg_re->sublen = PL_reg_oldsavedlen; | |
4588 | RX_MATCH_COPIED_on(PL_reg_re); | |
4589 | } | |
4590 | PL_reg_magic->mg_len = PL_reg_oldpos; | |
4591 | PL_reg_eval_set = 0; | |
4592 | PL_curpm = PL_reg_oldcurpm; | |
4593 | } | |
4594 | } | |
33b8afdf JH |
4595 | |
4596 | STATIC void | |
4597 | S_to_utf8_substr(pTHX_ register regexp *prog) | |
4598 | { | |
33b8afdf | 4599 | if (prog->float_substr && !prog->float_utf8) { |
a2592645 | 4600 | SV* sv; |
04851bb3 | 4601 | prog->float_utf8 = sv = newSVsv(prog->float_substr); |
33b8afdf JH |
4602 | sv_utf8_upgrade(sv); |
4603 | if (SvTAIL(prog->float_substr)) | |
4604 | SvTAIL_on(sv); | |
4605 | if (prog->float_substr == prog->check_substr) | |
4606 | prog->check_utf8 = sv; | |
4607 | } | |
4608 | if (prog->anchored_substr && !prog->anchored_utf8) { | |
a2592645 | 4609 | SV* sv; |
04851bb3 | 4610 | prog->anchored_utf8 = sv = newSVsv(prog->anchored_substr); |
33b8afdf JH |
4611 | sv_utf8_upgrade(sv); |
4612 | if (SvTAIL(prog->anchored_substr)) | |
4613 | SvTAIL_on(sv); | |
4614 | if (prog->anchored_substr == prog->check_substr) | |
4615 | prog->check_utf8 = sv; | |
4616 | } | |
4617 | } | |
4618 | ||
4619 | STATIC void | |
4620 | S_to_byte_substr(pTHX_ register regexp *prog) | |
4621 | { | |
33b8afdf | 4622 | if (prog->float_utf8 && !prog->float_substr) { |
a2592645 | 4623 | SV* sv; |
04851bb3 | 4624 | prog->float_substr = sv = newSVsv(prog->float_utf8); |
33b8afdf JH |
4625 | if (sv_utf8_downgrade(sv, TRUE)) { |
4626 | if (SvTAIL(prog->float_utf8)) | |
4627 | SvTAIL_on(sv); | |
4628 | } else { | |
4629 | SvREFCNT_dec(sv); | |
4630 | prog->float_substr = sv = &PL_sv_undef; | |
4631 | } | |
4632 | if (prog->float_utf8 == prog->check_utf8) | |
4633 | prog->check_substr = sv; | |
4634 | } | |
4635 | if (prog->anchored_utf8 && !prog->anchored_substr) { | |
a2592645 | 4636 | SV* sv; |
04851bb3 | 4637 | prog->anchored_substr = sv = newSVsv(prog->anchored_utf8); |
33b8afdf JH |
4638 | if (sv_utf8_downgrade(sv, TRUE)) { |
4639 | if (SvTAIL(prog->anchored_utf8)) | |
4640 | SvTAIL_on(sv); | |
4641 | } else { | |
4642 | SvREFCNT_dec(sv); | |
4643 | prog->anchored_substr = sv = &PL_sv_undef; | |
4644 | } | |
4645 | if (prog->anchored_utf8 == prog->check_utf8) | |
4646 | prog->check_substr = sv; | |
4647 | } | |
4648 | } | |
d8294a4d NC |
4649 | |
4650 | /* | |
4651 | * Local variables: | |
4652 | * c-indentation-style: bsd | |
4653 | * c-basic-offset: 4 | |
4654 | * indent-tabs-mode: t | |
4655 | * End: | |
4656 | * | |
4657 | * ex: set ts=8 sts=4 sw=4 noet: | |
4658 | */ |