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 | ||
61296642 DM |
8 | /* This file contains functions for executing a regular expression. See |
9 | * also regcomp.c which funnily enough, contains functions for compiling | |
166f8a29 | 10 | * a regular expression. |
e4a054ea DM |
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. | |
166f8a29 DM |
16 | */ |
17 | ||
a687059c LW |
18 | /* NOTE: this is derived from Henry Spencer's regexp code, and should not |
19 | * confused with the original package (see point 3 below). Thanks, Henry! | |
20 | */ | |
21 | ||
22 | /* Additional note: this code is very heavily munged from Henry's version | |
23 | * in places. In some spots I've traded clarity for efficiency, so don't | |
24 | * blame Henry for some of the lack of readability. | |
25 | */ | |
26 | ||
e50aee73 AD |
27 | /* The names of the functions have been changed from regcomp and |
28 | * regexec to pregcomp and pregexec in order to avoid conflicts | |
29 | * with the POSIX routines of the same names. | |
30 | */ | |
31 | ||
b9d5759e | 32 | #ifdef PERL_EXT_RE_BUILD |
54df2634 | 33 | #include "re_top.h" |
9041c2e3 | 34 | #endif |
56953603 | 35 | |
a687059c | 36 | /* |
e50aee73 | 37 | * pregcomp and pregexec -- regsub and regerror are not used in perl |
a687059c LW |
38 | * |
39 | * Copyright (c) 1986 by University of Toronto. | |
40 | * Written by Henry Spencer. Not derived from licensed software. | |
41 | * | |
42 | * Permission is granted to anyone to use this software for any | |
43 | * purpose on any computer system, and to redistribute it freely, | |
44 | * subject to the following restrictions: | |
45 | * | |
46 | * 1. The author is not responsible for the consequences of use of | |
47 | * this software, no matter how awful, even if they arise | |
48 | * from defects in it. | |
49 | * | |
50 | * 2. The origin of this software must not be misrepresented, either | |
51 | * by explicit claim or by omission. | |
52 | * | |
53 | * 3. Altered versions must be plainly marked as such, and must not | |
54 | * be misrepresented as being the original software. | |
55 | * | |
56 | **** Alterations to Henry's code are... | |
57 | **** | |
4bb101f2 | 58 | **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
fdf8c088 | 59 | **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others |
a687059c | 60 | **** |
9ef589d8 LW |
61 | **** You may distribute under the terms of either the GNU General Public |
62 | **** License or the Artistic License, as specified in the README file. | |
a687059c LW |
63 | * |
64 | * Beware that some of this code is subtly aware of the way operator | |
65 | * precedence is structured in regular expressions. Serious changes in | |
66 | * regular-expression syntax might require a total rethink. | |
67 | */ | |
68 | #include "EXTERN.h" | |
864dbfa3 | 69 | #define PERL_IN_REGEXEC_C |
a687059c | 70 | #include "perl.h" |
0f5d15d6 | 71 | |
54df2634 NC |
72 | #ifdef PERL_IN_XSUB_RE |
73 | # include "re_comp.h" | |
74 | #else | |
75 | # include "regcomp.h" | |
76 | #endif | |
a687059c | 77 | |
c277df42 IZ |
78 | #define RF_tainted 1 /* tainted information used? */ |
79 | #define RF_warned 2 /* warned about big count? */ | |
faec1544 | 80 | |
ab3bbdeb | 81 | #define RF_utf8 8 /* Pattern contains multibyte chars? */ |
a0ed51b3 | 82 | |
eb160463 | 83 | #define UTF ((PL_reg_flags & RF_utf8) != 0) |
ce862d02 IZ |
84 | |
85 | #define RS_init 1 /* eval environment created */ | |
86 | #define RS_set 2 /* replsv value is set */ | |
c277df42 | 87 | |
a687059c LW |
88 | #ifndef STATIC |
89 | #define STATIC static | |
90 | #endif | |
91 | ||
32fc9b6a | 92 | #define REGINCLASS(prog,p,c) (ANYOF_FLAGS(p) ? reginclass(prog,p,c,0,0) : ANYOF_BITMAP_TEST(p,*(c))) |
7d3e948e | 93 | |
c277df42 IZ |
94 | /* |
95 | * Forwards. | |
96 | */ | |
97 | ||
33b8afdf | 98 | #define CHR_SVLEN(sv) (do_utf8 ? sv_len_utf8(sv) : SvCUR(sv)) |
53c4c00c | 99 | #define CHR_DIST(a,b) (PL_reg_match_utf8 ? utf8_distance(a,b) : a - b) |
a0ed51b3 | 100 | |
3dab1dad YO |
101 | #define HOPc(pos,off) \ |
102 | (char *)(PL_reg_match_utf8 \ | |
52657f30 | 103 | ? reghop3((U8*)pos, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)) \ |
3dab1dad YO |
104 | : (U8*)(pos + off)) |
105 | #define HOPBACKc(pos, off) \ | |
07be1b83 YO |
106 | (char*)(PL_reg_match_utf8\ |
107 | ? reghopmaybe3((U8*)pos, -off, (U8*)PL_bostr) \ | |
108 | : (pos - off >= PL_bostr) \ | |
8e11feef | 109 | ? (U8*)pos - off \ |
3dab1dad | 110 | : NULL) |
efb30f32 | 111 | |
e7409c1b | 112 | #define HOP3(pos,off,lim) (PL_reg_match_utf8 ? reghop3((U8*)(pos), off, (U8*)(lim)) : (U8*)(pos + off)) |
1aa99e6b | 113 | #define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim)) |
1aa99e6b | 114 | |
1a4fad37 AL |
115 | #define LOAD_UTF8_CHARCLASS(class,str) STMT_START { \ |
116 | if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)str); assert(ok); LEAVE; } } STMT_END | |
117 | #define LOAD_UTF8_CHARCLASS_ALNUM() LOAD_UTF8_CHARCLASS(alnum,"a") | |
118 | #define LOAD_UTF8_CHARCLASS_DIGIT() LOAD_UTF8_CHARCLASS(digit,"0") | |
119 | #define LOAD_UTF8_CHARCLASS_SPACE() LOAD_UTF8_CHARCLASS(space," ") | |
120 | #define LOAD_UTF8_CHARCLASS_MARK() LOAD_UTF8_CHARCLASS(mark, "\xcd\x86") | |
51371543 | 121 | |
3dab1dad YO |
122 | /* TODO: Combine JUMPABLE and HAS_TEXT to cache OP(rn) */ |
123 | ||
5f80c4cf | 124 | /* for use after a quantifier and before an EXACT-like node -- japhy */ |
3e901dc0 YO |
125 | /* it would be nice to rework regcomp.sym to generate this stuff. sigh */ |
126 | #define JUMPABLE(rn) ( \ | |
127 | OP(rn) == OPEN || \ | |
128 | (OP(rn) == CLOSE && (!cur_eval || cur_eval->u.eval.close_paren != ARG(rn))) || \ | |
129 | OP(rn) == EVAL || \ | |
cca55fe3 JP |
130 | OP(rn) == SUSPEND || OP(rn) == IFMATCH || \ |
131 | OP(rn) == PLUS || OP(rn) == MINMOD || \ | |
ee9b8eae | 132 | OP(rn) == KEEPS || (PL_regkind[OP(rn)] == VERB) || \ |
3dab1dad | 133 | (PL_regkind[OP(rn)] == CURLY && ARG1(rn) > 0) \ |
e2d8ce26 | 134 | ) |
ee9b8eae | 135 | #define IS_EXACT(rn) (PL_regkind[OP(rn)] == EXACT) |
e2d8ce26 | 136 | |
ee9b8eae YO |
137 | #define HAS_TEXT(rn) ( IS_EXACT(rn) || PL_regkind[OP(rn)] == REF ) |
138 | ||
139 | #if 0 | |
140 | /* Currently these are only used when PL_regkind[OP(rn)] == EXACT so | |
141 | we don't need this definition. */ | |
142 | #define IS_TEXT(rn) ( OP(rn)==EXACT || OP(rn)==REF || OP(rn)==NREF ) | |
143 | #define IS_TEXTF(rn) ( OP(rn)==EXACTF || OP(rn)==REFF || OP(rn)==NREFF ) | |
144 | #define IS_TEXTFL(rn) ( OP(rn)==EXACTFL || OP(rn)==REFFL || OP(rn)==NREFFL ) | |
145 | ||
146 | #else | |
147 | /* ... so we use this as its faster. */ | |
148 | #define IS_TEXT(rn) ( OP(rn)==EXACT ) | |
149 | #define IS_TEXTF(rn) ( OP(rn)==EXACTF ) | |
150 | #define IS_TEXTFL(rn) ( OP(rn)==EXACTFL ) | |
151 | ||
152 | #endif | |
e2d8ce26 | 153 | |
a84d97b6 HS |
154 | /* |
155 | Search for mandatory following text node; for lookahead, the text must | |
156 | follow but for lookbehind (rn->flags != 0) we skip to the next step. | |
157 | */ | |
cca55fe3 | 158 | #define FIND_NEXT_IMPT(rn) STMT_START { \ |
3dab1dad YO |
159 | while (JUMPABLE(rn)) { \ |
160 | const OPCODE type = OP(rn); \ | |
161 | if (type == SUSPEND || PL_regkind[type] == CURLY) \ | |
e2d8ce26 | 162 | rn = NEXTOPER(NEXTOPER(rn)); \ |
3dab1dad | 163 | else if (type == PLUS) \ |
cca55fe3 | 164 | rn = NEXTOPER(rn); \ |
3dab1dad | 165 | else if (type == IFMATCH) \ |
a84d97b6 | 166 | rn = (rn->flags == 0) ? NEXTOPER(NEXTOPER(rn)) : rn + ARG(rn); \ |
e2d8ce26 | 167 | else rn += NEXT_OFF(rn); \ |
3dab1dad | 168 | } \ |
5f80c4cf | 169 | } STMT_END |
74750237 | 170 | |
c476f425 | 171 | |
acfe0abc | 172 | static void restore_pos(pTHX_ void *arg); |
51371543 | 173 | |
76e3520e | 174 | STATIC CHECKPOINT |
cea2e8a9 | 175 | S_regcppush(pTHX_ I32 parenfloor) |
a0d0e21e | 176 | { |
97aff369 | 177 | dVAR; |
a3b680e6 | 178 | const int retval = PL_savestack_ix; |
b1ce53c5 | 179 | #define REGCP_PAREN_ELEMS 4 |
a3b680e6 | 180 | const int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS; |
a0d0e21e | 181 | int p; |
40a82448 | 182 | GET_RE_DEBUG_FLAGS_DECL; |
a0d0e21e | 183 | |
e49a9654 IH |
184 | if (paren_elems_to_push < 0) |
185 | Perl_croak(aTHX_ "panic: paren_elems_to_push < 0"); | |
186 | ||
f0ab9afb | 187 | #define REGCP_OTHER_ELEMS 7 |
4b3c1a47 | 188 | SSGROW(paren_elems_to_push + REGCP_OTHER_ELEMS); |
7f69552c | 189 | |
3280af22 | 190 | for (p = PL_regsize; p > parenfloor; p--) { |
b1ce53c5 | 191 | /* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */ |
f0ab9afb NC |
192 | SSPUSHINT(PL_regoffs[p].end); |
193 | SSPUSHINT(PL_regoffs[p].start); | |
3280af22 | 194 | SSPUSHPTR(PL_reg_start_tmp[p]); |
a0d0e21e | 195 | SSPUSHINT(p); |
e7707071 | 196 | DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log, |
40a82448 | 197 | " saving \\%"UVuf" %"IVdf"(%"IVdf")..%"IVdf"\n", |
f0ab9afb | 198 | (UV)p, (IV)PL_regoffs[p].start, |
40a82448 | 199 | (IV)(PL_reg_start_tmp[p] - PL_bostr), |
f0ab9afb | 200 | (IV)PL_regoffs[p].end |
40a82448 | 201 | )); |
a0d0e21e | 202 | } |
b1ce53c5 | 203 | /* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */ |
f0ab9afb | 204 | SSPUSHPTR(PL_regoffs); |
3280af22 NIS |
205 | SSPUSHINT(PL_regsize); |
206 | SSPUSHINT(*PL_reglastparen); | |
a01268b5 | 207 | SSPUSHINT(*PL_reglastcloseparen); |
3280af22 | 208 | SSPUSHPTR(PL_reginput); |
41123dfd JH |
209 | #define REGCP_FRAME_ELEMS 2 |
210 | /* REGCP_FRAME_ELEMS are part of the REGCP_OTHER_ELEMS and | |
211 | * are needed for the regexp context stack bookkeeping. */ | |
212 | SSPUSHINT(paren_elems_to_push + REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS); | |
b1ce53c5 | 213 | SSPUSHINT(SAVEt_REGCONTEXT); /* Magic cookie. */ |
41123dfd | 214 | |
a0d0e21e LW |
215 | return retval; |
216 | } | |
217 | ||
c277df42 | 218 | /* These are needed since we do not localize EVAL nodes: */ |
ab3bbdeb YO |
219 | #define REGCP_SET(cp) \ |
220 | DEBUG_STATE_r( \ | |
ab3bbdeb | 221 | PerlIO_printf(Perl_debug_log, \ |
e4f74956 | 222 | " Setting an EVAL scope, savestack=%"IVdf"\n", \ |
ab3bbdeb YO |
223 | (IV)PL_savestack_ix)); \ |
224 | cp = PL_savestack_ix | |
c3464db5 | 225 | |
ab3bbdeb | 226 | #define REGCP_UNWIND(cp) \ |
e4f74956 | 227 | DEBUG_STATE_r( \ |
ab3bbdeb | 228 | if (cp != PL_savestack_ix) \ |
e4f74956 YO |
229 | PerlIO_printf(Perl_debug_log, \ |
230 | " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \ | |
ab3bbdeb YO |
231 | (IV)(cp), (IV)PL_savestack_ix)); \ |
232 | regcpblow(cp) | |
c277df42 | 233 | |
76e3520e | 234 | STATIC char * |
097eb12c | 235 | S_regcppop(pTHX_ const regexp *rex) |
a0d0e21e | 236 | { |
97aff369 | 237 | dVAR; |
3b6647e0 | 238 | U32 i; |
a0d0e21e | 239 | char *input; |
b1ce53c5 | 240 | |
a3621e74 YO |
241 | GET_RE_DEBUG_FLAGS_DECL; |
242 | ||
b1ce53c5 | 243 | /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */ |
a0d0e21e | 244 | i = SSPOPINT; |
b1ce53c5 JH |
245 | assert(i == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */ |
246 | i = SSPOPINT; /* Parentheses elements to pop. */ | |
a0d0e21e | 247 | input = (char *) SSPOPPTR; |
a01268b5 | 248 | *PL_reglastcloseparen = SSPOPINT; |
3280af22 NIS |
249 | *PL_reglastparen = SSPOPINT; |
250 | PL_regsize = SSPOPINT; | |
f0ab9afb | 251 | PL_regoffs=(regexp_paren_pair *) SSPOPPTR; |
b1ce53c5 | 252 | |
6bda09f9 | 253 | |
b1ce53c5 | 254 | /* Now restore the parentheses context. */ |
41123dfd JH |
255 | for (i -= (REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS); |
256 | i > 0; i -= REGCP_PAREN_ELEMS) { | |
1df70142 | 257 | I32 tmps; |
097eb12c | 258 | U32 paren = (U32)SSPOPINT; |
3280af22 | 259 | PL_reg_start_tmp[paren] = (char *) SSPOPPTR; |
f0ab9afb | 260 | PL_regoffs[paren].start = SSPOPINT; |
cf93c79d | 261 | tmps = SSPOPINT; |
3280af22 | 262 | if (paren <= *PL_reglastparen) |
f0ab9afb | 263 | PL_regoffs[paren].end = tmps; |
e7707071 | 264 | DEBUG_BUFFERS_r( |
c3464db5 | 265 | PerlIO_printf(Perl_debug_log, |
b900a521 | 266 | " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n", |
f0ab9afb | 267 | (UV)paren, (IV)PL_regoffs[paren].start, |
b900a521 | 268 | (IV)(PL_reg_start_tmp[paren] - PL_bostr), |
f0ab9afb | 269 | (IV)PL_regoffs[paren].end, |
3280af22 | 270 | (paren > *PL_reglastparen ? "(no)" : "")); |
c277df42 | 271 | ); |
a0d0e21e | 272 | } |
e7707071 | 273 | DEBUG_BUFFERS_r( |
bb7a0f54 | 274 | if (*PL_reglastparen + 1 <= rex->nparens) { |
c3464db5 | 275 | PerlIO_printf(Perl_debug_log, |
faccc32b | 276 | " restoring \\%"IVdf"..\\%"IVdf" to undef\n", |
4f639d21 | 277 | (IV)(*PL_reglastparen + 1), (IV)rex->nparens); |
c277df42 IZ |
278 | } |
279 | ); | |
daf18116 | 280 | #if 1 |
dafc8851 JH |
281 | /* It would seem that the similar code in regtry() |
282 | * already takes care of this, and in fact it is in | |
283 | * a better location to since this code can #if 0-ed out | |
284 | * but the code in regtry() is needed or otherwise tests | |
285 | * requiring null fields (pat.t#187 and split.t#{13,14} | |
daf18116 JH |
286 | * (as of patchlevel 7877) will fail. Then again, |
287 | * this code seems to be necessary or otherwise | |
288 | * building DynaLoader will fail: | |
289 | * "Error: '*' not in typemap in DynaLoader.xs, line 164" | |
290 | * --jhi */ | |
3b6647e0 | 291 | for (i = *PL_reglastparen + 1; i <= rex->nparens; i++) { |
097eb12c | 292 | if (i > PL_regsize) |
f0ab9afb NC |
293 | PL_regoffs[i].start = -1; |
294 | PL_regoffs[i].end = -1; | |
a0d0e21e | 295 | } |
dafc8851 | 296 | #endif |
a0d0e21e LW |
297 | return input; |
298 | } | |
299 | ||
02db2b7b | 300 | #define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */ |
a0d0e21e | 301 | |
a687059c | 302 | /* |
e50aee73 | 303 | * pregexec and friends |
a687059c LW |
304 | */ |
305 | ||
76234dfb | 306 | #ifndef PERL_IN_XSUB_RE |
a687059c | 307 | /* |
c277df42 | 308 | - pregexec - match a regexp against a string |
a687059c | 309 | */ |
c277df42 | 310 | I32 |
864dbfa3 | 311 | Perl_pregexec(pTHX_ register regexp *prog, char *stringarg, register char *strend, |
c3464db5 | 312 | char *strbeg, I32 minend, SV *screamer, U32 nosave) |
c277df42 IZ |
313 | /* strend: pointer to null at end of string */ |
314 | /* strbeg: real beginning of string */ | |
315 | /* minend: end of match must be >=minend after stringarg. */ | |
316 | /* nosave: For optimizations. */ | |
317 | { | |
318 | return | |
9041c2e3 | 319 | regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL, |
c277df42 IZ |
320 | nosave ? 0 : REXEC_COPY_STR); |
321 | } | |
76234dfb | 322 | #endif |
22e551b9 | 323 | |
9041c2e3 | 324 | /* |
cad2e5aa JH |
325 | * Need to implement the following flags for reg_anch: |
326 | * | |
327 | * USE_INTUIT_NOML - Useful to call re_intuit_start() first | |
328 | * USE_INTUIT_ML | |
329 | * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer | |
330 | * INTUIT_AUTORITATIVE_ML | |
331 | * INTUIT_ONCE_NOML - Intuit can match in one location only. | |
332 | * INTUIT_ONCE_ML | |
333 | * | |
334 | * Another flag for this function: SECOND_TIME (so that float substrs | |
335 | * with giant delta may be not rechecked). | |
336 | */ | |
337 | ||
338 | /* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */ | |
339 | ||
3f7c398e | 340 | /* If SCREAM, then SvPVX_const(sv) should be compatible with strpos and strend. |
cad2e5aa JH |
341 | Otherwise, only SvCUR(sv) is used to get strbeg. */ |
342 | ||
343 | /* XXXX We assume that strpos is strbeg unless sv. */ | |
344 | ||
6eb5f6b9 JH |
345 | /* XXXX Some places assume that there is a fixed substring. |
346 | An update may be needed if optimizer marks as "INTUITable" | |
347 | RExen without fixed substrings. Similarly, it is assumed that | |
348 | lengths of all the strings are no more than minlen, thus they | |
349 | cannot come from lookahead. | |
40d049e4 YO |
350 | (Or minlen should take into account lookahead.) |
351 | NOTE: Some of this comment is not correct. minlen does now take account | |
352 | of lookahead/behind. Further research is required. -- demerphq | |
353 | ||
354 | */ | |
6eb5f6b9 | 355 | |
2c2d71f5 JH |
356 | /* A failure to find a constant substring means that there is no need to make |
357 | an expensive call to REx engine, thus we celebrate a failure. Similarly, | |
358 | finding a substring too deep into the string means that less calls to | |
30944b6d IZ |
359 | regtry() should be needed. |
360 | ||
361 | REx compiler's optimizer found 4 possible hints: | |
362 | a) Anchored substring; | |
363 | b) Fixed substring; | |
364 | c) Whether we are anchored (beginning-of-line or \G); | |
365 | d) First node (of those at offset 0) which may distingush positions; | |
6eb5f6b9 | 366 | We use a)b)d) and multiline-part of c), and try to find a position in the |
30944b6d IZ |
367 | string which does not contradict any of them. |
368 | */ | |
2c2d71f5 | 369 | |
6eb5f6b9 JH |
370 | /* Most of decisions we do here should have been done at compile time. |
371 | The nodes of the REx which we used for the search should have been | |
372 | deleted from the finite automaton. */ | |
373 | ||
cad2e5aa JH |
374 | char * |
375 | Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, | |
376 | char *strend, U32 flags, re_scream_pos_data *data) | |
377 | { | |
97aff369 | 378 | dVAR; |
b7953727 | 379 | register I32 start_shift = 0; |
cad2e5aa | 380 | /* Should be nonnegative! */ |
b7953727 | 381 | register I32 end_shift = 0; |
2c2d71f5 JH |
382 | register char *s; |
383 | register SV *check; | |
a1933d95 | 384 | char *strbeg; |
cad2e5aa | 385 | char *t; |
1de06328 | 386 | const bool do_utf8 = (sv && SvUTF8(sv)) ? 1 : 0; /* if no sv we have to assume bytes */ |
cad2e5aa | 387 | I32 ml_anch; |
bd61b366 SS |
388 | register char *other_last = NULL; /* other substr checked before this */ |
389 | char *check_at = NULL; /* check substr found at this pos */ | |
bbe252da | 390 | const I32 multiline = prog->extflags & RXf_PMf_MULTILINE; |
f8fc2ecf | 391 | RXi_GET_DECL(prog,progi); |
30944b6d | 392 | #ifdef DEBUGGING |
890ce7af | 393 | const char * const i_strpos = strpos; |
30944b6d | 394 | #endif |
a3621e74 YO |
395 | |
396 | GET_RE_DEBUG_FLAGS_DECL; | |
397 | ||
a30b2f1f | 398 | RX_MATCH_UTF8_set(prog,do_utf8); |
cad2e5aa | 399 | |
bbe252da | 400 | if (prog->extflags & RXf_UTF8) { |
b8d68ded JH |
401 | PL_reg_flags |= RF_utf8; |
402 | } | |
ab3bbdeb YO |
403 | DEBUG_EXECUTE_r( |
404 | debug_start_match(prog, do_utf8, strpos, strend, | |
1de06328 YO |
405 | sv ? "Guessing start of match in sv for" |
406 | : "Guessing start of match in string for"); | |
2a782b5b | 407 | ); |
cad2e5aa | 408 | |
c344f387 JH |
409 | /* CHR_DIST() would be more correct here but it makes things slow. */ |
410 | if (prog->minlen > strend - strpos) { | |
a3621e74 | 411 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
a72c7584 | 412 | "String too short... [re_intuit_start]\n")); |
cad2e5aa | 413 | goto fail; |
2c2d71f5 | 414 | } |
1de06328 | 415 | |
a1933d95 | 416 | strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos; |
1aa99e6b | 417 | PL_regeol = strend; |
33b8afdf JH |
418 | if (do_utf8) { |
419 | if (!prog->check_utf8 && prog->check_substr) | |
420 | to_utf8_substr(prog); | |
421 | check = prog->check_utf8; | |
422 | } else { | |
423 | if (!prog->check_substr && prog->check_utf8) | |
424 | to_byte_substr(prog); | |
425 | check = prog->check_substr; | |
426 | } | |
1de06328 | 427 | if (check == &PL_sv_undef) { |
a3621e74 | 428 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
1de06328 | 429 | "Non-utf8 string cannot match utf8 check string\n")); |
33b8afdf JH |
430 | goto fail; |
431 | } | |
bbe252da YO |
432 | if (prog->extflags & RXf_ANCH) { /* Match at beg-of-str or after \n */ |
433 | ml_anch = !( (prog->extflags & RXf_ANCH_SINGLE) | |
434 | || ( (prog->extflags & RXf_ANCH_BOL) | |
7fba1cd6 | 435 | && !multiline ) ); /* Check after \n? */ |
cad2e5aa | 436 | |
7e25d62c | 437 | if (!ml_anch) { |
bbe252da YO |
438 | if ( !(prog->extflags & RXf_ANCH_GPOS) /* Checked by the caller */ |
439 | && !(prog->intflags & PREGf_IMPLICIT) /* not a real BOL */ | |
3f7c398e | 440 | /* SvCUR is not set on references: SvRV and SvPVX_const overlap */ |
7e25d62c JH |
441 | && sv && !SvROK(sv) |
442 | && (strpos != strbeg)) { | |
a3621e74 | 443 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not at start...\n")); |
7e25d62c JH |
444 | goto fail; |
445 | } | |
446 | if (prog->check_offset_min == prog->check_offset_max && | |
bbe252da | 447 | !(prog->extflags & RXf_CANY_SEEN)) { |
2c2d71f5 | 448 | /* Substring at constant offset from beg-of-str... */ |
cad2e5aa JH |
449 | I32 slen; |
450 | ||
1aa99e6b | 451 | s = HOP3c(strpos, prog->check_offset_min, strend); |
1de06328 | 452 | |
653099ff GS |
453 | if (SvTAIL(check)) { |
454 | slen = SvCUR(check); /* >= 1 */ | |
cad2e5aa | 455 | |
9041c2e3 | 456 | if ( strend - s > slen || strend - s < slen - 1 |
2c2d71f5 | 457 | || (strend - s == slen && strend[-1] != '\n')) { |
a3621e74 | 458 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String too long...\n")); |
2c2d71f5 | 459 | goto fail_finish; |
cad2e5aa JH |
460 | } |
461 | /* Now should match s[0..slen-2] */ | |
462 | slen--; | |
3f7c398e | 463 | if (slen && (*SvPVX_const(check) != *s |
cad2e5aa | 464 | || (slen > 1 |
3f7c398e | 465 | && memNE(SvPVX_const(check), s, slen)))) { |
2c2d71f5 | 466 | report_neq: |
a3621e74 | 467 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String not equal...\n")); |
2c2d71f5 JH |
468 | goto fail_finish; |
469 | } | |
cad2e5aa | 470 | } |
3f7c398e | 471 | else if (*SvPVX_const(check) != *s |
653099ff | 472 | || ((slen = SvCUR(check)) > 1 |
3f7c398e | 473 | && memNE(SvPVX_const(check), s, slen))) |
2c2d71f5 | 474 | goto report_neq; |
c315bfe8 | 475 | check_at = s; |
2c2d71f5 | 476 | goto success_at_start; |
7e25d62c | 477 | } |
cad2e5aa | 478 | } |
2c2d71f5 | 479 | /* Match is anchored, but substr is not anchored wrt beg-of-str. */ |
cad2e5aa | 480 | s = strpos; |
2c2d71f5 | 481 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
1de06328 YO |
482 | end_shift = prog->check_end_shift; |
483 | ||
2c2d71f5 | 484 | if (!ml_anch) { |
a3b680e6 | 485 | const I32 end = prog->check_offset_max + CHR_SVLEN(check) |
653099ff | 486 | - (SvTAIL(check) != 0); |
a3b680e6 | 487 | const I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end; |
2c2d71f5 JH |
488 | |
489 | if (end_shift < eshift) | |
490 | end_shift = eshift; | |
491 | } | |
cad2e5aa | 492 | } |
2c2d71f5 | 493 | else { /* Can match at random position */ |
cad2e5aa JH |
494 | ml_anch = 0; |
495 | s = strpos; | |
1de06328 YO |
496 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
497 | end_shift = prog->check_end_shift; | |
498 | ||
499 | /* end shift should be non negative here */ | |
cad2e5aa JH |
500 | } |
501 | ||
bcdf7404 | 502 | #ifdef QDEBUGGING /* 7/99: reports of failure (with the older version) */ |
0033605d | 503 | if (end_shift < 0) |
1de06328 | 504 | Perl_croak(aTHX_ "panic: end_shift: %"IVdf" pattern:\n%s\n ", |
b57a0404 | 505 | (IV)end_shift, prog->precomp); |
2c2d71f5 JH |
506 | #endif |
507 | ||
2c2d71f5 JH |
508 | restart: |
509 | /* Find a possible match in the region s..strend by looking for | |
510 | the "check" substring in the region corrected by start/end_shift. */ | |
1de06328 YO |
511 | |
512 | { | |
513 | I32 srch_start_shift = start_shift; | |
514 | I32 srch_end_shift = end_shift; | |
515 | if (srch_start_shift < 0 && strbeg - s > srch_start_shift) { | |
516 | srch_end_shift -= ((strbeg - s) - srch_start_shift); | |
517 | srch_start_shift = strbeg - s; | |
518 | } | |
6bda09f9 | 519 | DEBUG_OPTIMISE_MORE_r({ |
1de06328 YO |
520 | PerlIO_printf(Perl_debug_log, "Check offset min: %"IVdf" Start shift: %"IVdf" End shift %"IVdf" Real End Shift: %"IVdf"\n", |
521 | (IV)prog->check_offset_min, | |
522 | (IV)srch_start_shift, | |
523 | (IV)srch_end_shift, | |
524 | (IV)prog->check_end_shift); | |
525 | }); | |
526 | ||
cad2e5aa | 527 | if (flags & REXEC_SCREAM) { |
cad2e5aa | 528 | I32 p = -1; /* Internal iterator of scream. */ |
a3b680e6 | 529 | I32 * const pp = data ? data->scream_pos : &p; |
cad2e5aa | 530 | |
2c2d71f5 JH |
531 | if (PL_screamfirst[BmRARE(check)] >= 0 |
532 | || ( BmRARE(check) == '\n' | |
85c508c3 | 533 | && (BmPREVIOUS(check) == SvCUR(check) - 1) |
2c2d71f5 | 534 | && SvTAIL(check) )) |
9041c2e3 | 535 | s = screaminstr(sv, check, |
1de06328 | 536 | srch_start_shift + (s - strbeg), srch_end_shift, pp, 0); |
cad2e5aa | 537 | else |
2c2d71f5 | 538 | goto fail_finish; |
4addbd3b HS |
539 | /* we may be pointing at the wrong string */ |
540 | if (s && RX_MATCH_COPIED(prog)) | |
3f7c398e | 541 | s = strbeg + (s - SvPVX_const(sv)); |
cad2e5aa JH |
542 | if (data) |
543 | *data->scream_olds = s; | |
544 | } | |
1de06328 YO |
545 | else { |
546 | U8* start_point; | |
547 | U8* end_point; | |
bbe252da | 548 | if (prog->extflags & RXf_CANY_SEEN) { |
1de06328 YO |
549 | start_point= (U8*)(s + srch_start_shift); |
550 | end_point= (U8*)(strend - srch_end_shift); | |
551 | } else { | |
552 | start_point= HOP3(s, srch_start_shift, srch_start_shift < 0 ? strbeg : strend); | |
553 | end_point= HOP3(strend, -srch_end_shift, strbeg); | |
554 | } | |
6bda09f9 | 555 | DEBUG_OPTIMISE_MORE_r({ |
56570a2c | 556 | PerlIO_printf(Perl_debug_log, "fbm_instr len=%d str=<%.*s>\n", |
1de06328 | 557 | (int)(end_point - start_point), |
fc8cd66c | 558 | (int)(end_point - start_point) > 20 ? 20 : (int)(end_point - start_point), |
1de06328 YO |
559 | start_point); |
560 | }); | |
561 | ||
562 | s = fbm_instr( start_point, end_point, | |
7fba1cd6 | 563 | check, multiline ? FBMrf_MULTILINE : 0); |
1de06328 YO |
564 | } |
565 | } | |
cad2e5aa JH |
566 | /* Update the count-of-usability, remove useless subpatterns, |
567 | unshift s. */ | |
2c2d71f5 | 568 | |
ab3bbdeb YO |
569 | DEBUG_EXECUTE_r({ |
570 | RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0), | |
571 | SvPVX_const(check), RE_SV_DUMPLEN(check), 30); | |
572 | PerlIO_printf(Perl_debug_log, "%s %s substr %s%s%s", | |
2c2d71f5 | 573 | (s ? "Found" : "Did not find"), |
ab3bbdeb YO |
574 | (check == (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) |
575 | ? "anchored" : "floating"), | |
576 | quoted, | |
577 | RE_SV_TAIL(check), | |
578 | (s ? " at offset " : "...\n") ); | |
579 | }); | |
2c2d71f5 JH |
580 | |
581 | if (!s) | |
582 | goto fail_finish; | |
2c2d71f5 | 583 | /* Finish the diagnostic message */ |
a3621e74 | 584 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) ); |
2c2d71f5 | 585 | |
1de06328 YO |
586 | /* XXX dmq: first branch is for positive lookbehind... |
587 | Our check string is offset from the beginning of the pattern. | |
588 | So we need to do any stclass tests offset forward from that | |
589 | point. I think. :-( | |
590 | */ | |
591 | ||
592 | ||
593 | ||
594 | check_at=s; | |
595 | ||
596 | ||
2c2d71f5 JH |
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 | |
a0288114 | 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 | ||
1de06328 YO |
605 | if (do_utf8 ? (prog->float_utf8 && prog->anchored_utf8) |
606 | : (prog->float_substr && prog->anchored_substr)) | |
607 | { | |
30944b6d | 608 | /* Take into account the "other" substring. */ |
2c2d71f5 JH |
609 | /* XXXX May be hopelessly wrong for UTF... */ |
610 | if (!other_last) | |
6eb5f6b9 | 611 | other_last = strpos; |
33b8afdf | 612 | if (check == (do_utf8 ? prog->float_utf8 : prog->float_substr)) { |
30944b6d IZ |
613 | do_other_anchored: |
614 | { | |
890ce7af AL |
615 | char * const last = HOP3c(s, -start_shift, strbeg); |
616 | char *last1, *last2; | |
be8e71aa | 617 | char * const saved_s = s; |
33b8afdf | 618 | SV* must; |
2c2d71f5 | 619 | |
2c2d71f5 JH |
620 | t = s - prog->check_offset_max; |
621 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ | |
1d86a7f9 | 622 | && (!do_utf8 |
0ce71af7 | 623 | || ((t = (char*)reghopmaybe3((U8*)s, -(prog->check_offset_max), (U8*)strpos)) |
2c2d71f5 | 624 | && t > strpos))) |
6f207bd3 | 625 | NOOP; |
2c2d71f5 JH |
626 | else |
627 | t = strpos; | |
1aa99e6b | 628 | t = HOP3c(t, prog->anchored_offset, strend); |
6eb5f6b9 JH |
629 | if (t < other_last) /* These positions already checked */ |
630 | t = other_last; | |
1aa99e6b | 631 | last2 = last1 = HOP3c(strend, -prog->minlen, strbeg); |
2c2d71f5 JH |
632 | if (last < last1) |
633 | last1 = last; | |
1de06328 YO |
634 | /* XXXX It is not documented what units *_offsets are in. |
635 | We assume bytes, but this is clearly wrong. | |
636 | Meaning this code needs to be carefully reviewed for errors. | |
637 | dmq. | |
638 | */ | |
639 | ||
2c2d71f5 | 640 | /* On end-of-str: see comment below. */ |
33b8afdf JH |
641 | must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr; |
642 | if (must == &PL_sv_undef) { | |
643 | s = (char*)NULL; | |
1de06328 | 644 | DEBUG_r(must = prog->anchored_utf8); /* for debug */ |
33b8afdf JH |
645 | } |
646 | else | |
647 | s = fbm_instr( | |
648 | (unsigned char*)t, | |
649 | HOP3(HOP3(last1, prog->anchored_offset, strend) | |
650 | + SvCUR(must), -(SvTAIL(must)!=0), strbeg), | |
651 | must, | |
7fba1cd6 | 652 | multiline ? FBMrf_MULTILINE : 0 |
33b8afdf | 653 | ); |
ab3bbdeb YO |
654 | DEBUG_EXECUTE_r({ |
655 | RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0), | |
656 | SvPVX_const(must), RE_SV_DUMPLEN(must), 30); | |
657 | PerlIO_printf(Perl_debug_log, "%s anchored substr %s%s", | |
2c2d71f5 | 658 | (s ? "Found" : "Contradicts"), |
ab3bbdeb YO |
659 | quoted, RE_SV_TAIL(must)); |
660 | }); | |
661 | ||
662 | ||
2c2d71f5 JH |
663 | if (!s) { |
664 | if (last1 >= last2) { | |
a3621e74 | 665 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
2c2d71f5 JH |
666 | ", giving up...\n")); |
667 | goto fail_finish; | |
668 | } | |
a3621e74 | 669 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
2c2d71f5 | 670 | ", trying floating at offset %ld...\n", |
be8e71aa | 671 | (long)(HOP3c(saved_s, 1, strend) - i_strpos))); |
1aa99e6b IH |
672 | other_last = HOP3c(last1, prog->anchored_offset+1, strend); |
673 | s = HOP3c(last, 1, strend); | |
2c2d71f5 JH |
674 | goto restart; |
675 | } | |
676 | else { | |
a3621e74 | 677 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", |
30944b6d | 678 | (long)(s - i_strpos))); |
1aa99e6b IH |
679 | t = HOP3c(s, -prog->anchored_offset, strbeg); |
680 | other_last = HOP3c(s, 1, strend); | |
be8e71aa | 681 | s = saved_s; |
2c2d71f5 JH |
682 | if (t == strpos) |
683 | goto try_at_start; | |
2c2d71f5 JH |
684 | goto try_at_offset; |
685 | } | |
30944b6d | 686 | } |
2c2d71f5 JH |
687 | } |
688 | else { /* Take into account the floating substring. */ | |
33b8afdf | 689 | char *last, *last1; |
be8e71aa | 690 | char * const saved_s = s; |
33b8afdf JH |
691 | SV* must; |
692 | ||
693 | t = HOP3c(s, -start_shift, strbeg); | |
694 | last1 = last = | |
695 | HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg); | |
696 | if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset) | |
697 | last = HOP3c(t, prog->float_max_offset, strend); | |
698 | s = HOP3c(t, prog->float_min_offset, strend); | |
699 | if (s < other_last) | |
700 | s = other_last; | |
2c2d71f5 | 701 | /* XXXX It is not documented what units *_offsets are in. Assume bytes. */ |
33b8afdf JH |
702 | must = do_utf8 ? prog->float_utf8 : prog->float_substr; |
703 | /* fbm_instr() takes into account exact value of end-of-str | |
704 | if the check is SvTAIL(ed). Since false positives are OK, | |
705 | and end-of-str is not later than strend we are OK. */ | |
706 | if (must == &PL_sv_undef) { | |
707 | s = (char*)NULL; | |
1de06328 | 708 | DEBUG_r(must = prog->float_utf8); /* for debug message */ |
33b8afdf JH |
709 | } |
710 | else | |
2c2d71f5 | 711 | s = fbm_instr((unsigned char*)s, |
33b8afdf JH |
712 | (unsigned char*)last + SvCUR(must) |
713 | - (SvTAIL(must)!=0), | |
7fba1cd6 | 714 | must, multiline ? FBMrf_MULTILINE : 0); |
ab3bbdeb YO |
715 | DEBUG_EXECUTE_r({ |
716 | RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0), | |
717 | SvPVX_const(must), RE_SV_DUMPLEN(must), 30); | |
718 | PerlIO_printf(Perl_debug_log, "%s floating substr %s%s", | |
33b8afdf | 719 | (s ? "Found" : "Contradicts"), |
ab3bbdeb YO |
720 | quoted, RE_SV_TAIL(must)); |
721 | }); | |
33b8afdf JH |
722 | if (!s) { |
723 | if (last1 == last) { | |
a3621e74 | 724 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
33b8afdf JH |
725 | ", giving up...\n")); |
726 | goto fail_finish; | |
2c2d71f5 | 727 | } |
a3621e74 | 728 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
33b8afdf | 729 | ", trying anchored starting at offset %ld...\n", |
be8e71aa | 730 | (long)(saved_s + 1 - i_strpos))); |
33b8afdf JH |
731 | other_last = last; |
732 | s = HOP3c(t, 1, strend); | |
733 | goto restart; | |
734 | } | |
735 | else { | |
a3621e74 | 736 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", |
33b8afdf JH |
737 | (long)(s - i_strpos))); |
738 | other_last = s; /* Fix this later. --Hugo */ | |
be8e71aa | 739 | s = saved_s; |
33b8afdf JH |
740 | if (t == strpos) |
741 | goto try_at_start; | |
742 | goto try_at_offset; | |
743 | } | |
2c2d71f5 | 744 | } |
cad2e5aa | 745 | } |
2c2d71f5 | 746 | |
1de06328 | 747 | |
9ef43ace | 748 | t= (char*)HOP3( s, -prog->check_offset_max, (prog->check_offset_max<0) ? strend : strpos); |
1de06328 | 749 | |
6bda09f9 | 750 | DEBUG_OPTIMISE_MORE_r( |
1de06328 YO |
751 | PerlIO_printf(Perl_debug_log, |
752 | "Check offset min:%"IVdf" max:%"IVdf" S:%"IVdf" t:%"IVdf" D:%"IVdf" end:%"IVdf"\n", | |
753 | (IV)prog->check_offset_min, | |
754 | (IV)prog->check_offset_max, | |
755 | (IV)(s-strpos), | |
756 | (IV)(t-strpos), | |
757 | (IV)(t-s), | |
758 | (IV)(strend-strpos) | |
759 | ) | |
760 | ); | |
761 | ||
2c2d71f5 | 762 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ |
1d86a7f9 | 763 | && (!do_utf8 |
9ef43ace | 764 | || ((t = (char*)reghopmaybe3((U8*)s, -prog->check_offset_max, (U8*) ((prog->check_offset_max<0) ? strend : strpos))) |
1de06328 YO |
765 | && t > strpos))) |
766 | { | |
2c2d71f5 JH |
767 | /* Fixed substring is found far enough so that the match |
768 | cannot start at strpos. */ | |
769 | try_at_offset: | |
cad2e5aa | 770 | if (ml_anch && t[-1] != '\n') { |
30944b6d IZ |
771 | /* Eventually fbm_*() should handle this, but often |
772 | anchored_offset is not 0, so this check will not be wasted. */ | |
773 | /* XXXX In the code below we prefer to look for "^" even in | |
774 | presence of anchored substrings. And we search even | |
775 | beyond the found float position. These pessimizations | |
776 | are historical artefacts only. */ | |
777 | find_anchor: | |
2c2d71f5 | 778 | while (t < strend - prog->minlen) { |
cad2e5aa | 779 | if (*t == '\n') { |
4ee3650e | 780 | if (t < check_at - prog->check_offset_min) { |
33b8afdf | 781 | if (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) { |
4ee3650e GS |
782 | /* Since we moved from the found position, |
783 | we definitely contradict the found anchored | |
30944b6d IZ |
784 | substr. Due to the above check we do not |
785 | contradict "check" substr. | |
786 | Thus we can arrive here only if check substr | |
787 | is float. Redo checking for "other"=="fixed". | |
788 | */ | |
9041c2e3 | 789 | strpos = t + 1; |
a3621e74 | 790 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n", |
e4584336 | 791 | PL_colors[0], PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset))); |
30944b6d IZ |
792 | goto do_other_anchored; |
793 | } | |
4ee3650e GS |
794 | /* We don't contradict the found floating substring. */ |
795 | /* XXXX Why not check for STCLASS? */ | |
cad2e5aa | 796 | s = t + 1; |
a3621e74 | 797 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n", |
e4584336 | 798 | PL_colors[0], PL_colors[1], (long)(s - i_strpos))); |
cad2e5aa JH |
799 | goto set_useful; |
800 | } | |
4ee3650e GS |
801 | /* Position contradicts check-string */ |
802 | /* XXXX probably better to look for check-string | |
803 | than for "\n", so one should lower the limit for t? */ | |
a3621e74 | 804 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n", |
e4584336 | 805 | PL_colors[0], PL_colors[1], (long)(t + 1 - i_strpos))); |
0e41cd87 | 806 | other_last = strpos = s = t + 1; |
cad2e5aa JH |
807 | goto restart; |
808 | } | |
809 | t++; | |
810 | } | |
a3621e74 | 811 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n", |
e4584336 | 812 | PL_colors[0], PL_colors[1])); |
2c2d71f5 | 813 | goto fail_finish; |
cad2e5aa | 814 | } |
f5952150 | 815 | else { |
a3621e74 | 816 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n", |
e4584336 | 817 | PL_colors[0], PL_colors[1])); |
f5952150 | 818 | } |
cad2e5aa JH |
819 | s = t; |
820 | set_useful: | |
33b8afdf | 821 | ++BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr); /* hooray/5 */ |
cad2e5aa JH |
822 | } |
823 | else { | |
f5952150 | 824 | /* The found string does not prohibit matching at strpos, |
2c2d71f5 | 825 | - no optimization of calling REx engine can be performed, |
f5952150 GS |
826 | unless it was an MBOL and we are not after MBOL, |
827 | or a future STCLASS check will fail this. */ | |
2c2d71f5 JH |
828 | try_at_start: |
829 | /* Even in this situation we may use MBOL flag if strpos is offset | |
830 | wrt the start of the string. */ | |
05b4157f | 831 | if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */ |
a1933d95 | 832 | && (strpos != strbeg) && strpos[-1] != '\n' |
d506a20d | 833 | /* May be due to an implicit anchor of m{.*foo} */ |
bbe252da | 834 | && !(prog->intflags & PREGf_IMPLICIT)) |
d506a20d | 835 | { |
cad2e5aa JH |
836 | t = strpos; |
837 | goto find_anchor; | |
838 | } | |
a3621e74 | 839 | DEBUG_EXECUTE_r( if (ml_anch) |
f5952150 | 840 | PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n", |
70685ca0 | 841 | (long)(strpos - i_strpos), PL_colors[0], PL_colors[1]); |
30944b6d | 842 | ); |
2c2d71f5 | 843 | success_at_start: |
bbe252da | 844 | if (!(prog->intflags & PREGf_NAUGHTY) /* XXXX If strpos moved? */ |
33b8afdf JH |
845 | && (do_utf8 ? ( |
846 | prog->check_utf8 /* Could be deleted already */ | |
847 | && --BmUSEFUL(prog->check_utf8) < 0 | |
848 | && (prog->check_utf8 == prog->float_utf8) | |
849 | ) : ( | |
850 | prog->check_substr /* Could be deleted already */ | |
851 | && --BmUSEFUL(prog->check_substr) < 0 | |
852 | && (prog->check_substr == prog->float_substr) | |
853 | ))) | |
66e933ab | 854 | { |
cad2e5aa | 855 | /* If flags & SOMETHING - do not do it many times on the same match */ |
a3621e74 | 856 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n")); |
33b8afdf JH |
857 | SvREFCNT_dec(do_utf8 ? prog->check_utf8 : prog->check_substr); |
858 | if (do_utf8 ? prog->check_substr : prog->check_utf8) | |
859 | SvREFCNT_dec(do_utf8 ? prog->check_substr : prog->check_utf8); | |
a0714e2c SS |
860 | prog->check_substr = prog->check_utf8 = NULL; /* disable */ |
861 | prog->float_substr = prog->float_utf8 = NULL; /* clear */ | |
862 | check = NULL; /* abort */ | |
cad2e5aa | 863 | s = strpos; |
3cf5c195 IZ |
864 | /* XXXX This is a remnant of the old implementation. It |
865 | looks wasteful, since now INTUIT can use many | |
6eb5f6b9 | 866 | other heuristics. */ |
bbe252da | 867 | prog->extflags &= ~RXf_USE_INTUIT; |
cad2e5aa JH |
868 | } |
869 | else | |
870 | s = strpos; | |
871 | } | |
872 | ||
6eb5f6b9 JH |
873 | /* Last resort... */ |
874 | /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */ | |
1de06328 YO |
875 | /* trie stclasses are too expensive to use here, we are better off to |
876 | leave it to regmatch itself */ | |
f8fc2ecf | 877 | if (progi->regstclass && PL_regkind[OP(progi->regstclass)]!=TRIE) { |
6eb5f6b9 JH |
878 | /* minlen == 0 is possible if regstclass is \b or \B, |
879 | and the fixed substr is ''$. | |
880 | Since minlen is already taken into account, s+1 is before strend; | |
881 | accidentally, minlen >= 1 guaranties no false positives at s + 1 | |
882 | even for \b or \B. But (minlen? 1 : 0) below assumes that | |
883 | regstclass does not come from lookahead... */ | |
884 | /* If regstclass takes bytelength more than 1: If charlength==1, OK. | |
885 | This leaves EXACTF only, which is dealt with in find_byclass(). */ | |
f8fc2ecf YO |
886 | const U8* const str = (U8*)STRING(progi->regstclass); |
887 | const int cl_l = (PL_regkind[OP(progi->regstclass)] == EXACT | |
888 | ? CHR_DIST(str+STR_LEN(progi->regstclass), str) | |
66e933ab | 889 | : 1); |
1de06328 YO |
890 | char * endpos; |
891 | if (prog->anchored_substr || prog->anchored_utf8 || ml_anch) | |
892 | endpos= HOP3c(s, (prog->minlen ? cl_l : 0), strend); | |
893 | else if (prog->float_substr || prog->float_utf8) | |
894 | endpos= HOP3c(HOP3c(check_at, -start_shift, strbeg), cl_l, strend); | |
895 | else | |
896 | endpos= strend; | |
897 | ||
70685ca0 JH |
898 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %"IVdf" s: %"IVdf" endpos: %"IVdf"\n", |
899 | (IV)start_shift, (IV)(check_at - strbeg), (IV)(s - strbeg), (IV)(endpos - strbeg))); | |
1de06328 | 900 | |
6eb5f6b9 | 901 | t = s; |
f8fc2ecf | 902 | s = find_byclass(prog, progi->regstclass, s, endpos, NULL); |
6eb5f6b9 JH |
903 | if (!s) { |
904 | #ifdef DEBUGGING | |
cbbf8932 | 905 | const char *what = NULL; |
6eb5f6b9 JH |
906 | #endif |
907 | if (endpos == strend) { | |
a3621e74 | 908 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
6eb5f6b9 JH |
909 | "Could not match STCLASS...\n") ); |
910 | goto fail; | |
911 | } | |
a3621e74 | 912 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
66e933ab | 913 | "This position contradicts STCLASS...\n") ); |
bbe252da | 914 | if ((prog->extflags & RXf_ANCH) && !ml_anch) |
653099ff | 915 | goto fail; |
6eb5f6b9 | 916 | /* Contradict one of substrings */ |
33b8afdf JH |
917 | if (prog->anchored_substr || prog->anchored_utf8) { |
918 | if ((do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) == check) { | |
a3621e74 | 919 | DEBUG_EXECUTE_r( what = "anchored" ); |
6eb5f6b9 | 920 | hop_and_restart: |
1aa99e6b | 921 | s = HOP3c(t, 1, strend); |
66e933ab GS |
922 | if (s + start_shift + end_shift > strend) { |
923 | /* XXXX Should be taken into account earlier? */ | |
a3621e74 | 924 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
66e933ab GS |
925 | "Could not match STCLASS...\n") ); |
926 | goto fail; | |
927 | } | |
5e39e1e5 HS |
928 | if (!check) |
929 | goto giveup; | |
a3621e74 | 930 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 931 | "Looking for %s substr starting at offset %ld...\n", |
6eb5f6b9 JH |
932 | what, (long)(s + start_shift - i_strpos)) ); |
933 | goto restart; | |
934 | } | |
66e933ab | 935 | /* Have both, check_string is floating */ |
6eb5f6b9 JH |
936 | if (t + start_shift >= check_at) /* Contradicts floating=check */ |
937 | goto retry_floating_check; | |
938 | /* Recheck anchored substring, but not floating... */ | |
9041c2e3 | 939 | s = check_at; |
5e39e1e5 HS |
940 | if (!check) |
941 | goto giveup; | |
a3621e74 | 942 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 943 | "Looking for anchored substr starting at offset %ld...\n", |
6eb5f6b9 JH |
944 | (long)(other_last - i_strpos)) ); |
945 | goto do_other_anchored; | |
946 | } | |
60e71179 GS |
947 | /* Another way we could have checked stclass at the |
948 | current position only: */ | |
949 | if (ml_anch) { | |
950 | s = t = t + 1; | |
5e39e1e5 HS |
951 | if (!check) |
952 | goto giveup; | |
a3621e74 | 953 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 954 | "Looking for /%s^%s/m starting at offset %ld...\n", |
e4584336 | 955 | PL_colors[0], PL_colors[1], (long)(t - i_strpos)) ); |
60e71179 | 956 | goto try_at_offset; |
66e933ab | 957 | } |
33b8afdf | 958 | if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) /* Could have been deleted */ |
60e71179 | 959 | goto fail; |
6eb5f6b9 JH |
960 | /* Check is floating subtring. */ |
961 | retry_floating_check: | |
962 | t = check_at - start_shift; | |
a3621e74 | 963 | DEBUG_EXECUTE_r( what = "floating" ); |
6eb5f6b9 JH |
964 | goto hop_and_restart; |
965 | } | |
b7953727 | 966 | if (t != s) { |
a3621e74 | 967 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
6eb5f6b9 | 968 | "By STCLASS: moving %ld --> %ld\n", |
b7953727 JH |
969 | (long)(t - i_strpos), (long)(s - i_strpos)) |
970 | ); | |
971 | } | |
972 | else { | |
a3621e74 | 973 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
b7953727 JH |
974 | "Does not contradict STCLASS...\n"); |
975 | ); | |
976 | } | |
6eb5f6b9 | 977 | } |
5e39e1e5 | 978 | giveup: |
a3621e74 | 979 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n", |
5e39e1e5 HS |
980 | PL_colors[4], (check ? "Guessed" : "Giving up"), |
981 | PL_colors[5], (long)(s - i_strpos)) ); | |
cad2e5aa | 982 | return s; |
2c2d71f5 JH |
983 | |
984 | fail_finish: /* Substring not found */ | |
33b8afdf JH |
985 | if (prog->check_substr || prog->check_utf8) /* could be removed already */ |
986 | BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr) += 5; /* hooray */ | |
cad2e5aa | 987 | fail: |
a3621e74 | 988 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n", |
e4584336 | 989 | PL_colors[4], PL_colors[5])); |
bd61b366 | 990 | return NULL; |
cad2e5aa | 991 | } |
9661b544 | 992 | |
786e8c11 | 993 | |
3b0527fe | 994 | |
55eed653 NC |
995 | #define REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, uscan, len, \ |
996 | uvc, charid, foldlen, foldbuf, uniflags) STMT_START { \ | |
4cadc6a9 YO |
997 | switch (trie_type) { \ |
998 | case trie_utf8_fold: \ | |
999 | if ( foldlen>0 ) { \ | |
1000 | uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \ | |
1001 | foldlen -= len; \ | |
1002 | uscan += len; \ | |
1003 | len=0; \ | |
1004 | } else { \ | |
1005 | uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \ | |
1006 | uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \ | |
1007 | foldlen -= UNISKIP( uvc ); \ | |
1008 | uscan = foldbuf + UNISKIP( uvc ); \ | |
1009 | } \ | |
1010 | break; \ | |
1011 | case trie_utf8: \ | |
1012 | uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \ | |
1013 | break; \ | |
1014 | case trie_plain: \ | |
1015 | uvc = (UV)*uc; \ | |
1016 | len = 1; \ | |
1017 | } \ | |
1018 | \ | |
1019 | if (uvc < 256) { \ | |
1020 | charid = trie->charmap[ uvc ]; \ | |
1021 | } \ | |
1022 | else { \ | |
1023 | charid = 0; \ | |
55eed653 NC |
1024 | if (widecharmap) { \ |
1025 | SV** const svpp = hv_fetch(widecharmap, \ | |
4cadc6a9 YO |
1026 | (char*)&uvc, sizeof(UV), 0); \ |
1027 | if (svpp) \ | |
1028 | charid = (U16)SvIV(*svpp); \ | |
1029 | } \ | |
1030 | } \ | |
1031 | } STMT_END | |
1032 | ||
1033 | #define REXEC_FBC_EXACTISH_CHECK(CoNd) \ | |
1034 | if ( (CoNd) \ | |
1035 | && (ln == len || \ | |
1036 | ibcmp_utf8(s, NULL, 0, do_utf8, \ | |
1037 | m, NULL, ln, (bool)UTF)) \ | |
24b23f37 | 1038 | && (!reginfo || regtry(reginfo, &s)) ) \ |
4cadc6a9 YO |
1039 | goto got_it; \ |
1040 | else { \ | |
1041 | U8 foldbuf[UTF8_MAXBYTES_CASE+1]; \ | |
1042 | uvchr_to_utf8(tmpbuf, c); \ | |
1043 | f = to_utf8_fold(tmpbuf, foldbuf, &foldlen); \ | |
1044 | if ( f != c \ | |
1045 | && (f == c1 || f == c2) \ | |
1046 | && (ln == foldlen || \ | |
1047 | !ibcmp_utf8((char *) foldbuf, \ | |
1048 | NULL, foldlen, do_utf8, \ | |
1049 | m, \ | |
1050 | NULL, ln, (bool)UTF)) \ | |
24b23f37 | 1051 | && (!reginfo || regtry(reginfo, &s)) ) \ |
4cadc6a9 YO |
1052 | goto got_it; \ |
1053 | } \ | |
1054 | s += len | |
1055 | ||
1056 | #define REXEC_FBC_EXACTISH_SCAN(CoNd) \ | |
1057 | STMT_START { \ | |
1058 | while (s <= e) { \ | |
1059 | if ( (CoNd) \ | |
1060 | && (ln == 1 || !(OP(c) == EXACTF \ | |
1061 | ? ibcmp(s, m, ln) \ | |
1062 | : ibcmp_locale(s, m, ln))) \ | |
24b23f37 | 1063 | && (!reginfo || regtry(reginfo, &s)) ) \ |
4cadc6a9 YO |
1064 | goto got_it; \ |
1065 | s++; \ | |
1066 | } \ | |
1067 | } STMT_END | |
1068 | ||
1069 | #define REXEC_FBC_UTF8_SCAN(CoDe) \ | |
1070 | STMT_START { \ | |
1071 | while (s + (uskip = UTF8SKIP(s)) <= strend) { \ | |
1072 | CoDe \ | |
1073 | s += uskip; \ | |
1074 | } \ | |
1075 | } STMT_END | |
1076 | ||
1077 | #define REXEC_FBC_SCAN(CoDe) \ | |
1078 | STMT_START { \ | |
1079 | while (s < strend) { \ | |
1080 | CoDe \ | |
1081 | s++; \ | |
1082 | } \ | |
1083 | } STMT_END | |
1084 | ||
1085 | #define REXEC_FBC_UTF8_CLASS_SCAN(CoNd) \ | |
1086 | REXEC_FBC_UTF8_SCAN( \ | |
1087 | if (CoNd) { \ | |
24b23f37 | 1088 | if (tmp && (!reginfo || regtry(reginfo, &s))) \ |
4cadc6a9 YO |
1089 | goto got_it; \ |
1090 | else \ | |
1091 | tmp = doevery; \ | |
1092 | } \ | |
1093 | else \ | |
1094 | tmp = 1; \ | |
1095 | ) | |
1096 | ||
1097 | #define REXEC_FBC_CLASS_SCAN(CoNd) \ | |
1098 | REXEC_FBC_SCAN( \ | |
1099 | if (CoNd) { \ | |
24b23f37 | 1100 | if (tmp && (!reginfo || regtry(reginfo, &s))) \ |
4cadc6a9 YO |
1101 | goto got_it; \ |
1102 | else \ | |
1103 | tmp = doevery; \ | |
1104 | } \ | |
1105 | else \ | |
1106 | tmp = 1; \ | |
1107 | ) | |
1108 | ||
1109 | #define REXEC_FBC_TRYIT \ | |
24b23f37 | 1110 | if ((!reginfo || regtry(reginfo, &s))) \ |
4cadc6a9 YO |
1111 | goto got_it |
1112 | ||
e1d1eefb YO |
1113 | #define REXEC_FBC_CSCAN(CoNdUtF8,CoNd) \ |
1114 | if (do_utf8) { \ | |
1115 | REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \ | |
1116 | } \ | |
1117 | else { \ | |
1118 | REXEC_FBC_CLASS_SCAN(CoNd); \ | |
1119 | } \ | |
1120 | break | |
1121 | ||
4cadc6a9 YO |
1122 | #define REXEC_FBC_CSCAN_PRELOAD(UtFpReLoAd,CoNdUtF8,CoNd) \ |
1123 | if (do_utf8) { \ | |
1124 | UtFpReLoAd; \ | |
1125 | REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \ | |
1126 | } \ | |
1127 | else { \ | |
1128 | REXEC_FBC_CLASS_SCAN(CoNd); \ | |
1129 | } \ | |
1130 | break | |
1131 | ||
1132 | #define REXEC_FBC_CSCAN_TAINT(CoNdUtF8,CoNd) \ | |
1133 | PL_reg_flags |= RF_tainted; \ | |
1134 | if (do_utf8) { \ | |
1135 | REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \ | |
1136 | } \ | |
1137 | else { \ | |
1138 | REXEC_FBC_CLASS_SCAN(CoNd); \ | |
1139 | } \ | |
1140 | break | |
1141 | ||
786e8c11 YO |
1142 | #define DUMP_EXEC_POS(li,s,doutf8) \ |
1143 | dump_exec_pos(li,s,(PL_regeol),(PL_bostr),(PL_reg_starttry),doutf8) | |
1144 | ||
1145 | /* We know what class REx starts with. Try to find this position... */ | |
1146 | /* if reginfo is NULL, its a dryrun */ | |
1147 | /* annoyingly all the vars in this routine have different names from their counterparts | |
1148 | in regmatch. /grrr */ | |
1149 | ||
3c3eec57 | 1150 | STATIC char * |
07be1b83 | 1151 | S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s, |
24b23f37 | 1152 | const char *strend, regmatch_info *reginfo) |
a687059c | 1153 | { |
27da23d5 | 1154 | dVAR; |
bbe252da | 1155 | const I32 doevery = (prog->intflags & PREGf_SKIP) == 0; |
6eb5f6b9 | 1156 | char *m; |
d8093b23 | 1157 | STRLEN ln; |
5dab1207 | 1158 | STRLEN lnc; |
078c425b | 1159 | register STRLEN uskip; |
d8093b23 G |
1160 | unsigned int c1; |
1161 | unsigned int c2; | |
6eb5f6b9 JH |
1162 | char *e; |
1163 | register I32 tmp = 1; /* Scratch variable? */ | |
a3b680e6 | 1164 | register const bool do_utf8 = PL_reg_match_utf8; |
f8fc2ecf YO |
1165 | RXi_GET_DECL(prog,progi); |
1166 | ||
6eb5f6b9 JH |
1167 | /* We know what class it must start with. */ |
1168 | switch (OP(c)) { | |
6eb5f6b9 | 1169 | case ANYOF: |
388cc4de | 1170 | if (do_utf8) { |
4cadc6a9 | 1171 | REXEC_FBC_UTF8_CLASS_SCAN((ANYOF_FLAGS(c) & ANYOF_UNICODE) || |
388cc4de | 1172 | !UTF8_IS_INVARIANT((U8)s[0]) ? |
32fc9b6a | 1173 | reginclass(prog, c, (U8*)s, 0, do_utf8) : |
4cadc6a9 | 1174 | REGINCLASS(prog, c, (U8*)s)); |
388cc4de HS |
1175 | } |
1176 | else { | |
1177 | while (s < strend) { | |
1178 | STRLEN skip = 1; | |
1179 | ||
32fc9b6a | 1180 | if (REGINCLASS(prog, c, (U8*)s) || |
388cc4de HS |
1181 | (ANYOF_FOLD_SHARP_S(c, s, strend) && |
1182 | /* The assignment of 2 is intentional: | |
1183 | * for the folded sharp s, the skip is 2. */ | |
1184 | (skip = SHARP_S_SKIP))) { | |
24b23f37 | 1185 | if (tmp && (!reginfo || regtry(reginfo, &s))) |
388cc4de HS |
1186 | goto got_it; |
1187 | else | |
1188 | tmp = doevery; | |
1189 | } | |
1190 | else | |
1191 | tmp = 1; | |
1192 | s += skip; | |
1193 | } | |
a0d0e21e | 1194 | } |
6eb5f6b9 | 1195 | break; |
f33976b4 | 1196 | case CANY: |
4cadc6a9 | 1197 | REXEC_FBC_SCAN( |
24b23f37 | 1198 | if (tmp && (!reginfo || regtry(reginfo, &s))) |
f33976b4 DB |
1199 | goto got_it; |
1200 | else | |
1201 | tmp = doevery; | |
4cadc6a9 | 1202 | ); |
f33976b4 | 1203 | break; |
6eb5f6b9 | 1204 | case EXACTF: |
5dab1207 NIS |
1205 | m = STRING(c); |
1206 | ln = STR_LEN(c); /* length to match in octets/bytes */ | |
1207 | lnc = (I32) ln; /* length to match in characters */ | |
1aa99e6b | 1208 | if (UTF) { |
a2a2844f | 1209 | STRLEN ulen1, ulen2; |
5dab1207 | 1210 | U8 *sm = (U8 *) m; |
89ebb4a3 JH |
1211 | U8 tmpbuf1[UTF8_MAXBYTES_CASE+1]; |
1212 | U8 tmpbuf2[UTF8_MAXBYTES_CASE+1]; | |
4ad0818d | 1213 | const U32 uniflags = UTF8_ALLOW_DEFAULT; |
a2a2844f JH |
1214 | |
1215 | to_utf8_lower((U8*)m, tmpbuf1, &ulen1); | |
1216 | to_utf8_upper((U8*)m, tmpbuf2, &ulen2); | |
1217 | ||
89ebb4a3 | 1218 | c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXBYTES_CASE, |
041457d9 | 1219 | 0, uniflags); |
89ebb4a3 | 1220 | c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXBYTES_CASE, |
041457d9 | 1221 | 0, uniflags); |
5dab1207 NIS |
1222 | lnc = 0; |
1223 | while (sm < ((U8 *) m + ln)) { | |
1224 | lnc++; | |
1225 | sm += UTF8SKIP(sm); | |
1226 | } | |
1aa99e6b IH |
1227 | } |
1228 | else { | |
1229 | c1 = *(U8*)m; | |
1230 | c2 = PL_fold[c1]; | |
1231 | } | |
6eb5f6b9 JH |
1232 | goto do_exactf; |
1233 | case EXACTFL: | |
5dab1207 NIS |
1234 | m = STRING(c); |
1235 | ln = STR_LEN(c); | |
1236 | lnc = (I32) ln; | |
d8093b23 | 1237 | c1 = *(U8*)m; |
6eb5f6b9 JH |
1238 | c2 = PL_fold_locale[c1]; |
1239 | do_exactf: | |
db12adc6 | 1240 | e = HOP3c(strend, -((I32)lnc), s); |
b3c9acc1 | 1241 | |
3b0527fe | 1242 | if (!reginfo && e < s) |
6eb5f6b9 | 1243 | e = s; /* Due to minlen logic of intuit() */ |
1aa99e6b | 1244 | |
60a8b682 JH |
1245 | /* The idea in the EXACTF* cases is to first find the |
1246 | * first character of the EXACTF* node and then, if | |
1247 | * necessary, case-insensitively compare the full | |
1248 | * text of the node. The c1 and c2 are the first | |
1249 | * characters (though in Unicode it gets a bit | |
1250 | * more complicated because there are more cases | |
7f16dd3d JH |
1251 | * than just upper and lower: one needs to use |
1252 | * the so-called folding case for case-insensitive | |
1253 | * matching (called "loose matching" in Unicode). | |
1254 | * ibcmp_utf8() will do just that. */ | |
60a8b682 | 1255 | |
1aa99e6b | 1256 | if (do_utf8) { |
575cac57 | 1257 | UV c, f; |
89ebb4a3 | 1258 | U8 tmpbuf [UTF8_MAXBYTES+1]; |
575cac57 | 1259 | STRLEN len, foldlen; |
4ad0818d | 1260 | const U32 uniflags = UTF8_ALLOW_DEFAULT; |
09091399 | 1261 | if (c1 == c2) { |
5dab1207 NIS |
1262 | /* Upper and lower of 1st char are equal - |
1263 | * probably not a "letter". */ | |
1aa99e6b | 1264 | while (s <= e) { |
89ebb4a3 | 1265 | c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len, |
041457d9 | 1266 | uniflags); |
4cadc6a9 | 1267 | REXEC_FBC_EXACTISH_CHECK(c == c1); |
1aa99e6b | 1268 | } |
09091399 JH |
1269 | } |
1270 | else { | |
1aa99e6b | 1271 | while (s <= e) { |
89ebb4a3 | 1272 | c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len, |
041457d9 | 1273 | uniflags); |
80aecb99 | 1274 | |
60a8b682 | 1275 | /* Handle some of the three Greek sigmas cases. |
8c01da3c JH |
1276 | * Note that not all the possible combinations |
1277 | * are handled here: some of them are handled | |
1278 | * by the standard folding rules, and some of | |
1279 | * them (the character class or ANYOF cases) | |
1280 | * are handled during compiletime in | |
1281 | * regexec.c:S_regclass(). */ | |
880bd946 JH |
1282 | if (c == (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA || |
1283 | c == (UV)UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) | |
1284 | c = (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA; | |
80aecb99 | 1285 | |
4cadc6a9 | 1286 | REXEC_FBC_EXACTISH_CHECK(c == c1 || c == c2); |
1aa99e6b | 1287 | } |
09091399 | 1288 | } |
1aa99e6b IH |
1289 | } |
1290 | else { | |
1291 | if (c1 == c2) | |
4cadc6a9 | 1292 | REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1); |
1aa99e6b | 1293 | else |
4cadc6a9 | 1294 | REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1 || *(U8*)s == c2); |
b3c9acc1 IZ |
1295 | } |
1296 | break; | |
bbce6d69 | 1297 | case BOUNDL: |
3280af22 | 1298 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 1299 | /* FALL THROUGH */ |
a0d0e21e | 1300 | case BOUND: |
ffc61ed2 | 1301 | if (do_utf8) { |
12d33761 | 1302 | if (s == PL_bostr) |
ffc61ed2 JH |
1303 | tmp = '\n'; |
1304 | else { | |
6136c704 | 1305 | U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr); |
4ad0818d | 1306 | tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT); |
ffc61ed2 JH |
1307 | } |
1308 | tmp = ((OP(c) == BOUND ? | |
9041c2e3 | 1309 | isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0); |
1a4fad37 | 1310 | LOAD_UTF8_CHARCLASS_ALNUM(); |
4cadc6a9 | 1311 | REXEC_FBC_UTF8_SCAN( |
ffc61ed2 | 1312 | if (tmp == !(OP(c) == BOUND ? |
bb7a0f54 | 1313 | (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) : |
ffc61ed2 JH |
1314 | isALNUM_LC_utf8((U8*)s))) |
1315 | { | |
1316 | tmp = !tmp; | |
4cadc6a9 | 1317 | REXEC_FBC_TRYIT; |
a687059c | 1318 | } |
4cadc6a9 | 1319 | ); |
a0d0e21e | 1320 | } |
667bb95a | 1321 | else { |
12d33761 | 1322 | tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n'; |
ffc61ed2 | 1323 | tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0); |
4cadc6a9 | 1324 | REXEC_FBC_SCAN( |
ffc61ed2 JH |
1325 | if (tmp == |
1326 | !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) { | |
1327 | tmp = !tmp; | |
4cadc6a9 | 1328 | REXEC_FBC_TRYIT; |
a0ed51b3 | 1329 | } |
4cadc6a9 | 1330 | ); |
a0ed51b3 | 1331 | } |
24b23f37 | 1332 | if ((!prog->minlen && tmp) && (!reginfo || regtry(reginfo, &s))) |
a0ed51b3 LW |
1333 | goto got_it; |
1334 | break; | |
bbce6d69 | 1335 | case NBOUNDL: |
3280af22 | 1336 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 1337 | /* FALL THROUGH */ |
a0d0e21e | 1338 | case NBOUND: |
ffc61ed2 | 1339 | if (do_utf8) { |
12d33761 | 1340 | if (s == PL_bostr) |
ffc61ed2 JH |
1341 | tmp = '\n'; |
1342 | else { | |
6136c704 | 1343 | U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr); |
4ad0818d | 1344 | tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT); |
ffc61ed2 JH |
1345 | } |
1346 | tmp = ((OP(c) == NBOUND ? | |
9041c2e3 | 1347 | isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0); |
1a4fad37 | 1348 | LOAD_UTF8_CHARCLASS_ALNUM(); |
4cadc6a9 | 1349 | REXEC_FBC_UTF8_SCAN( |
ffc61ed2 | 1350 | if (tmp == !(OP(c) == NBOUND ? |
bb7a0f54 | 1351 | (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) : |
ffc61ed2 JH |
1352 | isALNUM_LC_utf8((U8*)s))) |
1353 | tmp = !tmp; | |
4cadc6a9 YO |
1354 | else REXEC_FBC_TRYIT; |
1355 | ); | |
a0d0e21e | 1356 | } |
667bb95a | 1357 | else { |
12d33761 | 1358 | tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n'; |
ffc61ed2 JH |
1359 | tmp = ((OP(c) == NBOUND ? |
1360 | isALNUM(tmp) : isALNUM_LC(tmp)) != 0); | |
4cadc6a9 | 1361 | REXEC_FBC_SCAN( |
ffc61ed2 JH |
1362 | if (tmp == |
1363 | !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s))) | |
1364 | tmp = !tmp; | |
4cadc6a9 YO |
1365 | else REXEC_FBC_TRYIT; |
1366 | ); | |
a0ed51b3 | 1367 | } |
24b23f37 | 1368 | if ((!prog->minlen && !tmp) && (!reginfo || regtry(reginfo, &s))) |
a0ed51b3 LW |
1369 | goto got_it; |
1370 | break; | |
a0d0e21e | 1371 | case ALNUM: |
4cadc6a9 YO |
1372 | REXEC_FBC_CSCAN_PRELOAD( |
1373 | LOAD_UTF8_CHARCLASS_ALNUM(), | |
1374 | swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8), | |
1375 | isALNUM(*s) | |
1376 | ); | |
bbce6d69 | 1377 | case ALNUML: |
4cadc6a9 YO |
1378 | REXEC_FBC_CSCAN_TAINT( |
1379 | isALNUM_LC_utf8((U8*)s), | |
1380 | isALNUM_LC(*s) | |
1381 | ); | |
a0d0e21e | 1382 | case NALNUM: |
4cadc6a9 YO |
1383 | REXEC_FBC_CSCAN_PRELOAD( |
1384 | LOAD_UTF8_CHARCLASS_ALNUM(), | |
1385 | !swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8), | |
1386 | !isALNUM(*s) | |
1387 | ); | |
bbce6d69 | 1388 | case NALNUML: |
4cadc6a9 YO |
1389 | REXEC_FBC_CSCAN_TAINT( |
1390 | !isALNUM_LC_utf8((U8*)s), | |
1391 | !isALNUM_LC(*s) | |
1392 | ); | |
a0d0e21e | 1393 | case SPACE: |
4cadc6a9 YO |
1394 | REXEC_FBC_CSCAN_PRELOAD( |
1395 | LOAD_UTF8_CHARCLASS_SPACE(), | |
1396 | *s == ' ' || swash_fetch(PL_utf8_space,(U8*)s, do_utf8), | |
1397 | isSPACE(*s) | |
1398 | ); | |
bbce6d69 | 1399 | case SPACEL: |
4cadc6a9 YO |
1400 | REXEC_FBC_CSCAN_TAINT( |
1401 | *s == ' ' || isSPACE_LC_utf8((U8*)s), | |
1402 | isSPACE_LC(*s) | |
1403 | ); | |
a0d0e21e | 1404 | case NSPACE: |
4cadc6a9 YO |
1405 | REXEC_FBC_CSCAN_PRELOAD( |
1406 | LOAD_UTF8_CHARCLASS_SPACE(), | |
1407 | !(*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s, do_utf8)), | |
1408 | !isSPACE(*s) | |
1409 | ); | |
bbce6d69 | 1410 | case NSPACEL: |
4cadc6a9 YO |
1411 | REXEC_FBC_CSCAN_TAINT( |
1412 | !(*s == ' ' || isSPACE_LC_utf8((U8*)s)), | |
1413 | !isSPACE_LC(*s) | |
1414 | ); | |
a0d0e21e | 1415 | case DIGIT: |
4cadc6a9 YO |
1416 | REXEC_FBC_CSCAN_PRELOAD( |
1417 | LOAD_UTF8_CHARCLASS_DIGIT(), | |
1418 | swash_fetch(PL_utf8_digit,(U8*)s, do_utf8), | |
1419 | isDIGIT(*s) | |
1420 | ); | |
b8c5462f | 1421 | case DIGITL: |
4cadc6a9 YO |
1422 | REXEC_FBC_CSCAN_TAINT( |
1423 | isDIGIT_LC_utf8((U8*)s), | |
1424 | isDIGIT_LC(*s) | |
1425 | ); | |
a0d0e21e | 1426 | case NDIGIT: |
4cadc6a9 YO |
1427 | REXEC_FBC_CSCAN_PRELOAD( |
1428 | LOAD_UTF8_CHARCLASS_DIGIT(), | |
1429 | !swash_fetch(PL_utf8_digit,(U8*)s, do_utf8), | |
1430 | !isDIGIT(*s) | |
1431 | ); | |
b8c5462f | 1432 | case NDIGITL: |
4cadc6a9 YO |
1433 | REXEC_FBC_CSCAN_TAINT( |
1434 | !isDIGIT_LC_utf8((U8*)s), | |
1435 | !isDIGIT_LC(*s) | |
1436 | ); | |
e1d1eefb YO |
1437 | case LNBREAK: |
1438 | REXEC_FBC_CSCAN( | |
1439 | is_LNBREAK_utf8(s), | |
1440 | is_LNBREAK_latin1(s) | |
1441 | ); | |
1442 | case VERTWS: | |
1443 | REXEC_FBC_CSCAN( | |
1444 | is_VERTWS_utf8(s), | |
1445 | is_VERTWS_latin1(s) | |
1446 | ); | |
1447 | case NVERTWS: | |
1448 | REXEC_FBC_CSCAN( | |
1449 | !is_VERTWS_utf8(s), | |
1450 | !is_VERTWS_latin1(s) | |
1451 | ); | |
1452 | case HORIZWS: | |
1453 | REXEC_FBC_CSCAN( | |
1454 | is_HORIZWS_utf8(s), | |
1455 | is_HORIZWS_latin1(s) | |
1456 | ); | |
1457 | case NHORIZWS: | |
1458 | REXEC_FBC_CSCAN( | |
1459 | !is_HORIZWS_utf8(s), | |
1460 | !is_HORIZWS_latin1(s) | |
1461 | ); | |
1de06328 YO |
1462 | case AHOCORASICKC: |
1463 | case AHOCORASICK: | |
07be1b83 YO |
1464 | { |
1465 | const enum { trie_plain, trie_utf8, trie_utf8_fold } | |
1466 | trie_type = do_utf8 ? | |
1467 | (c->flags == EXACT ? trie_utf8 : trie_utf8_fold) | |
1468 | : trie_plain; | |
1469 | /* what trie are we using right now */ | |
1470 | reg_ac_data *aho | |
f8fc2ecf | 1471 | = (reg_ac_data*)progi->data->data[ ARG( c ) ]; |
3251b653 NC |
1472 | reg_trie_data *trie |
1473 | = (reg_trie_data*)progi->data->data[ aho->trie ]; | |
55eed653 | 1474 | HV *widecharmap = (HV*) progi->data->data[ aho->trie + 1 ]; |
07be1b83 YO |
1475 | |
1476 | const char *last_start = strend - trie->minlen; | |
6148ee25 | 1477 | #ifdef DEBUGGING |
07be1b83 | 1478 | const char *real_start = s; |
6148ee25 | 1479 | #endif |
07be1b83 | 1480 | STRLEN maxlen = trie->maxlen; |
be8e71aa YO |
1481 | SV *sv_points; |
1482 | U8 **points; /* map of where we were in the input string | |
786e8c11 | 1483 | when reading a given char. For ASCII this |
be8e71aa YO |
1484 | is unnecessary overhead as the relationship |
1485 | is always 1:1, but for unicode, especially | |
1486 | case folded unicode this is not true. */ | |
f9e705e8 | 1487 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; |
786e8c11 YO |
1488 | U8 *bitmap=NULL; |
1489 | ||
07be1b83 YO |
1490 | |
1491 | GET_RE_DEBUG_FLAGS_DECL; | |
1492 | ||
be8e71aa YO |
1493 | /* We can't just allocate points here. We need to wrap it in |
1494 | * an SV so it gets freed properly if there is a croak while | |
1495 | * running the match */ | |
1496 | ENTER; | |
1497 | SAVETMPS; | |
1498 | sv_points=newSV(maxlen * sizeof(U8 *)); | |
1499 | SvCUR_set(sv_points, | |
1500 | maxlen * sizeof(U8 *)); | |
1501 | SvPOK_on(sv_points); | |
1502 | sv_2mortal(sv_points); | |
1503 | points=(U8**)SvPV_nolen(sv_points ); | |
1de06328 YO |
1504 | if ( trie_type != trie_utf8_fold |
1505 | && (trie->bitmap || OP(c)==AHOCORASICKC) ) | |
1506 | { | |
786e8c11 YO |
1507 | if (trie->bitmap) |
1508 | bitmap=(U8*)trie->bitmap; | |
1509 | else | |
1510 | bitmap=(U8*)ANYOF_BITMAP(c); | |
07be1b83 | 1511 | } |
786e8c11 YO |
1512 | /* this is the Aho-Corasick algorithm modified a touch |
1513 | to include special handling for long "unknown char" | |
1514 | sequences. The basic idea being that we use AC as long | |
1515 | as we are dealing with a possible matching char, when | |
1516 | we encounter an unknown char (and we have not encountered | |
1517 | an accepting state) we scan forward until we find a legal | |
1518 | starting char. | |
1519 | AC matching is basically that of trie matching, except | |
1520 | that when we encounter a failing transition, we fall back | |
1521 | to the current states "fail state", and try the current char | |
1522 | again, a process we repeat until we reach the root state, | |
1523 | state 1, or a legal transition. If we fail on the root state | |
1524 | then we can either terminate if we have reached an accepting | |
1525 | state previously, or restart the entire process from the beginning | |
1526 | if we have not. | |
1527 | ||
1528 | */ | |
07be1b83 YO |
1529 | while (s <= last_start) { |
1530 | const U32 uniflags = UTF8_ALLOW_DEFAULT; | |
1531 | U8 *uc = (U8*)s; | |
1532 | U16 charid = 0; | |
1533 | U32 base = 1; | |
1534 | U32 state = 1; | |
1535 | UV uvc = 0; | |
1536 | STRLEN len = 0; | |
1537 | STRLEN foldlen = 0; | |
1538 | U8 *uscan = (U8*)NULL; | |
1539 | U8 *leftmost = NULL; | |
786e8c11 YO |
1540 | #ifdef DEBUGGING |
1541 | U32 accepted_word= 0; | |
1542 | #endif | |
07be1b83 YO |
1543 | U32 pointpos = 0; |
1544 | ||
1545 | while ( state && uc <= (U8*)strend ) { | |
1546 | int failed=0; | |
786e8c11 YO |
1547 | U32 word = aho->states[ state ].wordnum; |
1548 | ||
1de06328 YO |
1549 | if( state==1 ) { |
1550 | if ( bitmap ) { | |
1551 | DEBUG_TRIE_EXECUTE_r( | |
1552 | if ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) { | |
1553 | dump_exec_pos( (char *)uc, c, strend, real_start, | |
1554 | (char *)uc, do_utf8 ); | |
1555 | PerlIO_printf( Perl_debug_log, | |
1556 | " Scanning for legal start char...\n"); | |
1557 | } | |
1558 | ); | |
1559 | while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) { | |
1560 | uc++; | |
786e8c11 | 1561 | } |
1de06328 | 1562 | s= (char *)uc; |
786e8c11 | 1563 | } |
786e8c11 YO |
1564 | if (uc >(U8*)last_start) break; |
1565 | } | |
1566 | ||
1567 | if ( word ) { | |
1568 | U8 *lpos= points[ (pointpos - trie->wordlen[word-1] ) % maxlen ]; | |
1569 | if (!leftmost || lpos < leftmost) { | |
1570 | DEBUG_r(accepted_word=word); | |
07be1b83 | 1571 | leftmost= lpos; |
786e8c11 | 1572 | } |
07be1b83 | 1573 | if (base==0) break; |
786e8c11 | 1574 | |
07be1b83 YO |
1575 | } |
1576 | points[pointpos++ % maxlen]= uc; | |
55eed653 NC |
1577 | REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, |
1578 | uscan, len, uvc, charid, foldlen, | |
1579 | foldbuf, uniflags); | |
786e8c11 YO |
1580 | DEBUG_TRIE_EXECUTE_r({ |
1581 | dump_exec_pos( (char *)uc, c, strend, real_start, | |
1582 | s, do_utf8 ); | |
07be1b83 | 1583 | PerlIO_printf(Perl_debug_log, |
786e8c11 YO |
1584 | " Charid:%3u CP:%4"UVxf" ", |
1585 | charid, uvc); | |
1586 | }); | |
07be1b83 YO |
1587 | |
1588 | do { | |
6148ee25 | 1589 | #ifdef DEBUGGING |
786e8c11 | 1590 | word = aho->states[ state ].wordnum; |
6148ee25 | 1591 | #endif |
07be1b83 YO |
1592 | base = aho->states[ state ].trans.base; |
1593 | ||
786e8c11 YO |
1594 | DEBUG_TRIE_EXECUTE_r({ |
1595 | if (failed) | |
1596 | dump_exec_pos( (char *)uc, c, strend, real_start, | |
1597 | s, do_utf8 ); | |
07be1b83 | 1598 | PerlIO_printf( Perl_debug_log, |
786e8c11 YO |
1599 | "%sState: %4"UVxf", word=%"UVxf, |
1600 | failed ? " Fail transition to " : "", | |
1601 | (UV)state, (UV)word); | |
1602 | }); | |
07be1b83 YO |
1603 | if ( base ) { |
1604 | U32 tmp; | |
1605 | if (charid && | |
1606 | (base + charid > trie->uniquecharcount ) | |
1607 | && (base + charid - 1 - trie->uniquecharcount | |
1608 | < trie->lasttrans) | |
1609 | && trie->trans[base + charid - 1 - | |
1610 | trie->uniquecharcount].check == state | |
1611 | && (tmp=trie->trans[base + charid - 1 - | |
1612 | trie->uniquecharcount ].next)) | |
1613 | { | |
786e8c11 YO |
1614 | DEBUG_TRIE_EXECUTE_r( |
1615 | PerlIO_printf( Perl_debug_log," - legal\n")); | |
07be1b83 YO |
1616 | state = tmp; |
1617 | break; | |
1618 | } | |
1619 | else { | |
786e8c11 YO |
1620 | DEBUG_TRIE_EXECUTE_r( |
1621 | PerlIO_printf( Perl_debug_log," - fail\n")); | |
1622 | failed = 1; | |
1623 | state = aho->fail[state]; | |
07be1b83 YO |
1624 | } |
1625 | } | |
1626 | else { | |
1627 | /* we must be accepting here */ | |
786e8c11 YO |
1628 | DEBUG_TRIE_EXECUTE_r( |
1629 | PerlIO_printf( Perl_debug_log," - accepting\n")); | |
1630 | failed = 1; | |
07be1b83 YO |
1631 | break; |
1632 | } | |
1633 | } while(state); | |
786e8c11 | 1634 | uc += len; |
07be1b83 YO |
1635 | if (failed) { |
1636 | if (leftmost) | |
1637 | break; | |
786e8c11 | 1638 | if (!state) state = 1; |
07be1b83 YO |
1639 | } |
1640 | } | |
1641 | if ( aho->states[ state ].wordnum ) { | |
1642 | U8 *lpos = points[ (pointpos - trie->wordlen[aho->states[ state ].wordnum-1]) % maxlen ]; | |
786e8c11 YO |
1643 | if (!leftmost || lpos < leftmost) { |
1644 | DEBUG_r(accepted_word=aho->states[ state ].wordnum); | |
07be1b83 | 1645 | leftmost = lpos; |
786e8c11 | 1646 | } |
07be1b83 | 1647 | } |
07be1b83 YO |
1648 | if (leftmost) { |
1649 | s = (char*)leftmost; | |
786e8c11 YO |
1650 | DEBUG_TRIE_EXECUTE_r({ |
1651 | PerlIO_printf( | |
70685ca0 JH |
1652 | Perl_debug_log,"Matches word #%"UVxf" at position %"IVdf". Trying full pattern...\n", |
1653 | (UV)accepted_word, (IV)(s - real_start) | |
786e8c11 YO |
1654 | ); |
1655 | }); | |
24b23f37 | 1656 | if (!reginfo || regtry(reginfo, &s)) { |
be8e71aa YO |
1657 | FREETMPS; |
1658 | LEAVE; | |
07be1b83 | 1659 | goto got_it; |
be8e71aa | 1660 | } |
07be1b83 | 1661 | s = HOPc(s,1); |
786e8c11 YO |
1662 | DEBUG_TRIE_EXECUTE_r({ |
1663 | PerlIO_printf( Perl_debug_log,"Pattern failed. Looking for new start point...\n"); | |
1664 | }); | |
07be1b83 | 1665 | } else { |
786e8c11 YO |
1666 | DEBUG_TRIE_EXECUTE_r( |
1667 | PerlIO_printf( Perl_debug_log,"No match.\n")); | |
07be1b83 YO |
1668 | break; |
1669 | } | |
1670 | } | |
be8e71aa YO |
1671 | FREETMPS; |
1672 | LEAVE; | |
07be1b83 YO |
1673 | } |
1674 | break; | |
b3c9acc1 | 1675 | default: |
3c3eec57 GS |
1676 | Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c)); |
1677 | break; | |
d6a28714 | 1678 | } |
6eb5f6b9 JH |
1679 | return 0; |
1680 | got_it: | |
1681 | return s; | |
1682 | } | |
1683 | ||
e6aad7ab | 1684 | static void |
fae667d5 | 1685 | S_swap_match_buff (pTHX_ regexp *prog) { |
f0ab9afb | 1686 | regexp_paren_pair *t; |
fae667d5 | 1687 | |
28d8d7f4 | 1688 | if (!prog->swap) { |
fae667d5 YO |
1689 | /* We have to be careful. If the previous successful match |
1690 | was from this regex we don't want a subsequent paritally | |
1691 | successful match to clobber the old results. | |
1692 | So when we detect this possibility we add a swap buffer | |
1693 | to the re, and switch the buffer each match. If we fail | |
1694 | we switch it back, otherwise we leave it swapped. | |
1695 | */ | |
f0ab9afb | 1696 | Newxz(prog->swap, (prog->nparens + 1), regexp_paren_pair); |
fae667d5 | 1697 | } |
f0ab9afb NC |
1698 | t = prog->swap; |
1699 | prog->swap = prog->offs; | |
1700 | prog->offs = t; | |
fae667d5 YO |
1701 | } |
1702 | ||
1703 | ||
6eb5f6b9 JH |
1704 | /* |
1705 | - regexec_flags - match a regexp against a string | |
1706 | */ | |
1707 | I32 | |
1708 | Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char *strend, | |
1709 | char *strbeg, I32 minend, SV *sv, void *data, U32 flags) | |
1710 | /* strend: pointer to null at end of string */ | |
1711 | /* strbeg: real beginning of string */ | |
1712 | /* minend: end of match must be >=minend after stringarg. */ | |
58e23c8d YO |
1713 | /* data: May be used for some additional optimizations. |
1714 | Currently its only used, with a U32 cast, for transmitting | |
1715 | the ganch offset when doing a /g match. This will change */ | |
6eb5f6b9 JH |
1716 | /* nosave: For optimizations. */ |
1717 | { | |
97aff369 | 1718 | dVAR; |
24b23f37 | 1719 | /*register*/ char *s; |
6eb5f6b9 | 1720 | register regnode *c; |
24b23f37 | 1721 | /*register*/ char *startpos = stringarg; |
6eb5f6b9 JH |
1722 | I32 minlen; /* must match at least this many chars */ |
1723 | I32 dontbother = 0; /* how many characters not to try at end */ | |
6eb5f6b9 JH |
1724 | I32 end_shift = 0; /* Same for the end. */ /* CC */ |
1725 | I32 scream_pos = -1; /* Internal iterator of scream. */ | |
ccac19ea | 1726 | char *scream_olds = NULL; |
f9f4320a | 1727 | const bool do_utf8 = (bool)DO_UTF8(sv); |
2757e526 | 1728 | I32 multiline; |
f8fc2ecf | 1729 | RXi_GET_DECL(prog,progi); |
3b0527fe | 1730 | regmatch_info reginfo; /* create some info to pass to regtry etc */ |
fae667d5 | 1731 | bool swap_on_fail = 0; |
a3621e74 YO |
1732 | |
1733 | GET_RE_DEBUG_FLAGS_DECL; | |
1734 | ||
9d4ba2ae | 1735 | PERL_UNUSED_ARG(data); |
6eb5f6b9 JH |
1736 | |
1737 | /* Be paranoid... */ | |
1738 | if (prog == NULL || startpos == NULL) { | |
1739 | Perl_croak(aTHX_ "NULL regexp parameter"); | |
1740 | return 0; | |
1741 | } | |
1742 | ||
bbe252da | 1743 | multiline = prog->extflags & RXf_PMf_MULTILINE; |
3b0527fe | 1744 | reginfo.prog = prog; |
2757e526 | 1745 | |
bac06658 | 1746 | RX_MATCH_UTF8_set(prog, do_utf8); |
1de06328 YO |
1747 | DEBUG_EXECUTE_r( |
1748 | debug_start_match(prog, do_utf8, startpos, strend, | |
1749 | "Matching"); | |
1750 | ); | |
bac06658 | 1751 | |
6eb5f6b9 | 1752 | minlen = prog->minlen; |
1de06328 YO |
1753 | |
1754 | if (strend - startpos < (minlen+(prog->check_offset_min<0?prog->check_offset_min:0))) { | |
a3621e74 | 1755 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
a72c7584 JH |
1756 | "String too short [regexec_flags]...\n")); |
1757 | goto phooey; | |
1aa99e6b | 1758 | } |
6eb5f6b9 | 1759 | |
1de06328 | 1760 | |
6eb5f6b9 | 1761 | /* Check validity of program. */ |
f8fc2ecf | 1762 | if (UCHARAT(progi->program) != REG_MAGIC) { |
6eb5f6b9 JH |
1763 | Perl_croak(aTHX_ "corrupted regexp program"); |
1764 | } | |
1765 | ||
1766 | PL_reg_flags = 0; | |
1767 | PL_reg_eval_set = 0; | |
1768 | PL_reg_maxiter = 0; | |
1769 | ||
bbe252da | 1770 | if (prog->extflags & RXf_UTF8) |
6eb5f6b9 JH |
1771 | PL_reg_flags |= RF_utf8; |
1772 | ||
1773 | /* Mark beginning of line for ^ and lookbehind. */ | |
3b0527fe | 1774 | reginfo.bol = startpos; /* XXX not used ??? */ |
6eb5f6b9 | 1775 | PL_bostr = strbeg; |
3b0527fe | 1776 | reginfo.sv = sv; |
6eb5f6b9 JH |
1777 | |
1778 | /* Mark end of line for $ (and such) */ | |
1779 | PL_regeol = strend; | |
1780 | ||
1781 | /* see how far we have to get to not match where we matched before */ | |
3b0527fe | 1782 | reginfo.till = startpos+minend; |
6eb5f6b9 | 1783 | |
6eb5f6b9 JH |
1784 | /* If there is a "must appear" string, look for it. */ |
1785 | s = startpos; | |
1786 | ||
bbe252da | 1787 | if (prog->extflags & RXf_GPOS_SEEN) { /* Need to set reginfo->ganch */ |
6eb5f6b9 JH |
1788 | MAGIC *mg; |
1789 | ||
1790 | if (flags & REXEC_IGNOREPOS) /* Means: check only at start */ | |
58e23c8d | 1791 | reginfo.ganch = startpos + prog->gofs; |
6eb5f6b9 JH |
1792 | else if (sv && SvTYPE(sv) >= SVt_PVMG |
1793 | && SvMAGIC(sv) | |
14befaf4 DM |
1794 | && (mg = mg_find(sv, PERL_MAGIC_regex_global)) |
1795 | && mg->mg_len >= 0) { | |
3b0527fe | 1796 | reginfo.ganch = strbeg + mg->mg_len; /* Defined pos() */ |
bbe252da | 1797 | if (prog->extflags & RXf_ANCH_GPOS) { |
3b0527fe | 1798 | if (s > reginfo.ganch) |
6eb5f6b9 | 1799 | goto phooey; |
58e23c8d | 1800 | s = reginfo.ganch - prog->gofs; |
6eb5f6b9 JH |
1801 | } |
1802 | } | |
58e23c8d | 1803 | else if (data) { |
70685ca0 | 1804 | reginfo.ganch = strbeg + PTR2UV(data); |
58e23c8d | 1805 | } else /* pos() not defined */ |
3b0527fe | 1806 | reginfo.ganch = strbeg; |
6eb5f6b9 | 1807 | } |
c74340f9 | 1808 | if (PL_curpm && (PM_GETRE(PL_curpm) == prog)) { |
fae667d5 YO |
1809 | swap_on_fail = 1; |
1810 | swap_match_buff(prog); /* do we need a save destructor here for | |
1811 | eval dies? */ | |
c74340f9 | 1812 | } |
a0714e2c | 1813 | if (!(flags & REXEC_CHECKED) && (prog->check_substr != NULL || prog->check_utf8 != NULL)) { |
6eb5f6b9 JH |
1814 | re_scream_pos_data d; |
1815 | ||
1816 | d.scream_olds = &scream_olds; | |
1817 | d.scream_pos = &scream_pos; | |
1818 | s = re_intuit_start(prog, sv, s, strend, flags, &d); | |
3fa9c3d7 | 1819 | if (!s) { |
a3621e74 | 1820 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not present...\n")); |
6eb5f6b9 | 1821 | goto phooey; /* not present */ |
3fa9c3d7 | 1822 | } |
6eb5f6b9 JH |
1823 | } |
1824 | ||
1de06328 | 1825 | |
6eb5f6b9 JH |
1826 | |
1827 | /* Simplest case: anchored match need be tried only once. */ | |
1828 | /* [unless only anchor is BOL and multiline is set] */ | |
bbe252da | 1829 | if (prog->extflags & (RXf_ANCH & ~RXf_ANCH_GPOS)) { |
24b23f37 | 1830 | if (s == startpos && regtry(®info, &startpos)) |
6eb5f6b9 | 1831 | goto got_it; |
bbe252da YO |
1832 | else if (multiline || (prog->intflags & PREGf_IMPLICIT) |
1833 | || (prog->extflags & RXf_ANCH_MBOL)) /* XXXX SBOL? */ | |
6eb5f6b9 JH |
1834 | { |
1835 | char *end; | |
1836 | ||
1837 | if (minlen) | |
1838 | dontbother = minlen - 1; | |
1aa99e6b | 1839 | end = HOP3c(strend, -dontbother, strbeg) - 1; |
6eb5f6b9 | 1840 | /* for multiline we only have to try after newlines */ |
33b8afdf | 1841 | if (prog->check_substr || prog->check_utf8) { |
6eb5f6b9 JH |
1842 | if (s == startpos) |
1843 | goto after_try; | |
1844 | while (1) { | |
24b23f37 | 1845 | if (regtry(®info, &s)) |
6eb5f6b9 JH |
1846 | goto got_it; |
1847 | after_try: | |
1848 | if (s >= end) | |
1849 | goto phooey; | |
bbe252da | 1850 | if (prog->extflags & RXf_USE_INTUIT) { |
6eb5f6b9 JH |
1851 | s = re_intuit_start(prog, sv, s + 1, strend, flags, NULL); |
1852 | if (!s) | |
1853 | goto phooey; | |
1854 | } | |
1855 | else | |
1856 | s++; | |
1857 | } | |
1858 | } else { | |
1859 | if (s > startpos) | |
1860 | s--; | |
1861 | while (s < end) { | |
1862 | if (*s++ == '\n') { /* don't need PL_utf8skip here */ | |
24b23f37 | 1863 | if (regtry(®info, &s)) |
6eb5f6b9 JH |
1864 | goto got_it; |
1865 | } | |
1866 | } | |
1867 | } | |
1868 | } | |
1869 | goto phooey; | |
bbe252da | 1870 | } else if (RXf_GPOS_CHECK == (prog->extflags & RXf_GPOS_CHECK)) |
f9f4320a YO |
1871 | { |
1872 | /* the warning about reginfo.ganch being used without intialization | |
bbe252da | 1873 | is bogus -- we set it above, when prog->extflags & RXf_GPOS_SEEN |
f9f4320a | 1874 | and we only enter this block when the same bit is set. */ |
58e23c8d YO |
1875 | char *tmp_s = reginfo.ganch - prog->gofs; |
1876 | if (regtry(®info, &tmp_s)) | |
6eb5f6b9 JH |
1877 | goto got_it; |
1878 | goto phooey; | |
1879 | } | |
1880 | ||
1881 | /* Messy cases: unanchored match. */ | |
bbe252da | 1882 | if ((prog->anchored_substr || prog->anchored_utf8) && prog->intflags & PREGf_SKIP) { |
6eb5f6b9 JH |
1883 | /* we have /x+whatever/ */ |
1884 | /* it must be a one character string (XXXX Except UTF?) */ | |
33b8afdf | 1885 | char ch; |
bf93d4cc GS |
1886 | #ifdef DEBUGGING |
1887 | int did_match = 0; | |
1888 | #endif | |
33b8afdf JH |
1889 | if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)) |
1890 | do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog); | |
3f7c398e | 1891 | ch = SvPVX_const(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)[0]; |
bf93d4cc | 1892 | |
1aa99e6b | 1893 | if (do_utf8) { |
4cadc6a9 | 1894 | REXEC_FBC_SCAN( |
6eb5f6b9 | 1895 | if (*s == ch) { |
a3621e74 | 1896 | DEBUG_EXECUTE_r( did_match = 1 ); |
24b23f37 | 1897 | if (regtry(®info, &s)) goto got_it; |
6eb5f6b9 JH |
1898 | s += UTF8SKIP(s); |
1899 | while (s < strend && *s == ch) | |
1900 | s += UTF8SKIP(s); | |
1901 | } | |
4cadc6a9 | 1902 | ); |
6eb5f6b9 JH |
1903 | } |
1904 | else { | |
4cadc6a9 | 1905 | REXEC_FBC_SCAN( |
6eb5f6b9 | 1906 | if (*s == ch) { |
a3621e74 | 1907 | DEBUG_EXECUTE_r( did_match = 1 ); |
24b23f37 | 1908 | if (regtry(®info, &s)) goto got_it; |
6eb5f6b9 JH |
1909 | s++; |
1910 | while (s < strend && *s == ch) | |
1911 | s++; | |
1912 | } | |
4cadc6a9 | 1913 | ); |
6eb5f6b9 | 1914 | } |
a3621e74 | 1915 | DEBUG_EXECUTE_r(if (!did_match) |
bf93d4cc | 1916 | PerlIO_printf(Perl_debug_log, |
b7953727 JH |
1917 | "Did not find anchored character...\n") |
1918 | ); | |
6eb5f6b9 | 1919 | } |
a0714e2c SS |
1920 | else if (prog->anchored_substr != NULL |
1921 | || prog->anchored_utf8 != NULL | |
1922 | || ((prog->float_substr != NULL || prog->float_utf8 != NULL) | |
33b8afdf JH |
1923 | && prog->float_max_offset < strend - s)) { |
1924 | SV *must; | |
1925 | I32 back_max; | |
1926 | I32 back_min; | |
1927 | char *last; | |
6eb5f6b9 | 1928 | char *last1; /* Last position checked before */ |
bf93d4cc GS |
1929 | #ifdef DEBUGGING |
1930 | int did_match = 0; | |
1931 | #endif | |
33b8afdf JH |
1932 | if (prog->anchored_substr || prog->anchored_utf8) { |
1933 | if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)) | |
1934 | do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog); | |
1935 | must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr; | |
1936 | back_max = back_min = prog->anchored_offset; | |
1937 | } else { | |
1938 | if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) | |
1939 | do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog); | |
1940 | must = do_utf8 ? prog->float_utf8 : prog->float_substr; | |
1941 | back_max = prog->float_max_offset; | |
1942 | back_min = prog->float_min_offset; | |
1943 | } | |
1de06328 YO |
1944 | |
1945 | ||
33b8afdf JH |
1946 | if (must == &PL_sv_undef) |
1947 | /* could not downgrade utf8 check substring, so must fail */ | |
1948 | goto phooey; | |
1949 | ||
1de06328 YO |
1950 | if (back_min<0) { |
1951 | last = strend; | |
1952 | } else { | |
1953 | last = HOP3c(strend, /* Cannot start after this */ | |
1954 | -(I32)(CHR_SVLEN(must) | |
1955 | - (SvTAIL(must) != 0) + back_min), strbeg); | |
1956 | } | |
6eb5f6b9 JH |
1957 | if (s > PL_bostr) |
1958 | last1 = HOPc(s, -1); | |
1959 | else | |
1960 | last1 = s - 1; /* bogus */ | |
1961 | ||
a0288114 | 1962 | /* XXXX check_substr already used to find "s", can optimize if |
6eb5f6b9 JH |
1963 | check_substr==must. */ |
1964 | scream_pos = -1; | |
1965 | dontbother = end_shift; | |
1966 | strend = HOPc(strend, -dontbother); | |
1967 | while ( (s <= last) && | |
9041c2e3 | 1968 | ((flags & REXEC_SCREAM) |
1de06328 | 1969 | ? (s = screaminstr(sv, must, HOP3c(s, back_min, (back_min<0 ? strbeg : strend)) - strbeg, |
6eb5f6b9 | 1970 | end_shift, &scream_pos, 0)) |
1de06328 | 1971 | : (s = fbm_instr((unsigned char*)HOP3(s, back_min, (back_min<0 ? strbeg : strend)), |
9041c2e3 | 1972 | (unsigned char*)strend, must, |
7fba1cd6 | 1973 | multiline ? FBMrf_MULTILINE : 0))) ) { |
4addbd3b HS |
1974 | /* we may be pointing at the wrong string */ |
1975 | if ((flags & REXEC_SCREAM) && RX_MATCH_COPIED(prog)) | |
3f7c398e | 1976 | s = strbeg + (s - SvPVX_const(sv)); |
a3621e74 | 1977 | DEBUG_EXECUTE_r( did_match = 1 ); |
6eb5f6b9 JH |
1978 | if (HOPc(s, -back_max) > last1) { |
1979 | last1 = HOPc(s, -back_min); | |
1980 | s = HOPc(s, -back_max); | |
1981 | } | |
1982 | else { | |
52657f30 | 1983 | char * const t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1; |
6eb5f6b9 JH |
1984 | |
1985 | last1 = HOPc(s, -back_min); | |
52657f30 | 1986 | s = t; |
6eb5f6b9 | 1987 | } |
1aa99e6b | 1988 | if (do_utf8) { |
6eb5f6b9 | 1989 | while (s <= last1) { |
24b23f37 | 1990 | if (regtry(®info, &s)) |
6eb5f6b9 JH |
1991 | goto got_it; |
1992 | s += UTF8SKIP(s); | |
1993 | } | |
1994 | } | |
1995 | else { | |
1996 | while (s <= last1) { | |
24b23f37 | 1997 | if (regtry(®info, &s)) |
6eb5f6b9 JH |
1998 | goto got_it; |
1999 | s++; | |
2000 | } | |
2001 | } | |
2002 | } | |
ab3bbdeb YO |
2003 | DEBUG_EXECUTE_r(if (!did_match) { |
2004 | RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0), | |
2005 | SvPVX_const(must), RE_SV_DUMPLEN(must), 30); | |
2006 | PerlIO_printf(Perl_debug_log, "Did not find %s substr %s%s...\n", | |
33b8afdf | 2007 | ((must == prog->anchored_substr || must == prog->anchored_utf8) |
bf93d4cc | 2008 | ? "anchored" : "floating"), |
ab3bbdeb YO |
2009 | quoted, RE_SV_TAIL(must)); |
2010 | }); | |
6eb5f6b9 JH |
2011 | goto phooey; |
2012 | } | |
f8fc2ecf | 2013 | else if ( (c = progi->regstclass) ) { |
f14c76ed | 2014 | if (minlen) { |
f8fc2ecf | 2015 | const OPCODE op = OP(progi->regstclass); |
66e933ab | 2016 | /* don't bother with what can't match */ |
786e8c11 | 2017 | if (PL_regkind[op] != EXACT && op != CANY && PL_regkind[op] != TRIE) |
f14c76ed RGS |
2018 | strend = HOPc(strend, -(minlen - 1)); |
2019 | } | |
a3621e74 | 2020 | DEBUG_EXECUTE_r({ |
be8e71aa | 2021 | SV * const prop = sv_newmortal(); |
32fc9b6a | 2022 | regprop(prog, prop, c); |
0df25f3d | 2023 | { |
02daf0ab | 2024 | RE_PV_QUOTED_DECL(quoted,do_utf8,PERL_DEBUG_PAD_ZERO(1), |
ab3bbdeb | 2025 | s,strend-s,60); |
0df25f3d | 2026 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb | 2027 | "Matching stclass %.*s against %s (%d chars)\n", |
e4f74956 | 2028 | (int)SvCUR(prop), SvPVX_const(prop), |
ab3bbdeb | 2029 | quoted, (int)(strend - s)); |
0df25f3d | 2030 | } |
ffc61ed2 | 2031 | }); |
3b0527fe | 2032 | if (find_byclass(prog, c, s, strend, ®info)) |
6eb5f6b9 | 2033 | goto got_it; |
07be1b83 | 2034 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass... [regexec_flags]\n")); |
d6a28714 JH |
2035 | } |
2036 | else { | |
2037 | dontbother = 0; | |
a0714e2c | 2038 | if (prog->float_substr != NULL || prog->float_utf8 != NULL) { |
33b8afdf | 2039 | /* Trim the end. */ |
d6a28714 | 2040 | char *last; |
33b8afdf JH |
2041 | SV* float_real; |
2042 | ||
2043 | if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) | |
2044 | do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog); | |
2045 | float_real = do_utf8 ? prog->float_utf8 : prog->float_substr; | |
d6a28714 JH |
2046 | |
2047 | if (flags & REXEC_SCREAM) { | |
33b8afdf | 2048 | last = screaminstr(sv, float_real, s - strbeg, |
d6a28714 JH |
2049 | end_shift, &scream_pos, 1); /* last one */ |
2050 | if (!last) | |
ffc61ed2 | 2051 | last = scream_olds; /* Only one occurrence. */ |
4addbd3b HS |
2052 | /* we may be pointing at the wrong string */ |
2053 | else if (RX_MATCH_COPIED(prog)) | |
3f7c398e | 2054 | s = strbeg + (s - SvPVX_const(sv)); |
b8c5462f | 2055 | } |
d6a28714 JH |
2056 | else { |
2057 | STRLEN len; | |
cfd0369c | 2058 | const char * const little = SvPV_const(float_real, len); |
d6a28714 | 2059 | |
33b8afdf | 2060 | if (SvTAIL(float_real)) { |
d6a28714 JH |
2061 | if (memEQ(strend - len + 1, little, len - 1)) |
2062 | last = strend - len + 1; | |
7fba1cd6 | 2063 | else if (!multiline) |
9041c2e3 | 2064 | last = memEQ(strend - len, little, len) |
bd61b366 | 2065 | ? strend - len : NULL; |
b8c5462f | 2066 | else |
d6a28714 JH |
2067 | goto find_last; |
2068 | } else { | |
2069 | find_last: | |
9041c2e3 | 2070 | if (len) |
d6a28714 | 2071 | last = rninstr(s, strend, little, little + len); |
b8c5462f | 2072 | else |
a0288114 | 2073 | last = strend; /* matching "$" */ |
b8c5462f | 2074 | } |
b8c5462f | 2075 | } |
bf93d4cc | 2076 | if (last == NULL) { |
6bda09f9 YO |
2077 | DEBUG_EXECUTE_r( |
2078 | PerlIO_printf(Perl_debug_log, | |
2079 | "%sCan't trim the tail, match fails (should not happen)%s\n", | |
2080 | PL_colors[4], PL_colors[5])); | |
bf93d4cc GS |
2081 | goto phooey; /* Should not happen! */ |
2082 | } | |
d6a28714 JH |
2083 | dontbother = strend - last + prog->float_min_offset; |
2084 | } | |
2085 | if (minlen && (dontbother < minlen)) | |
2086 | dontbother = minlen - 1; | |
2087 | strend -= dontbother; /* this one's always in bytes! */ | |
2088 | /* We don't know much -- general case. */ | |
1aa99e6b | 2089 | if (do_utf8) { |
d6a28714 | 2090 | for (;;) { |
24b23f37 | 2091 | if (regtry(®info, &s)) |
d6a28714 JH |
2092 | goto got_it; |
2093 | if (s >= strend) | |
2094 | break; | |
b8c5462f | 2095 | s += UTF8SKIP(s); |
d6a28714 JH |
2096 | }; |
2097 | } | |
2098 | else { | |
2099 | do { | |
24b23f37 | 2100 | if (regtry(®info, &s)) |
d6a28714 JH |
2101 | goto got_it; |
2102 | } while (s++ < strend); | |
2103 | } | |
2104 | } | |
2105 | ||
2106 | /* Failure. */ | |
2107 | goto phooey; | |
2108 | ||
2109 | got_it: | |
2110 | RX_MATCH_TAINTED_set(prog, PL_reg_flags & RF_tainted); | |
2111 | ||
19b95bf0 | 2112 | if (PL_reg_eval_set) |
4f639d21 | 2113 | restore_pos(aTHX_ prog); |
81714fb9 YO |
2114 | if (prog->paren_names) |
2115 | (void)hv_iterinit(prog->paren_names); | |
d6a28714 JH |
2116 | |
2117 | /* make sure $`, $&, $', and $digit will work later */ | |
2118 | if ( !(flags & REXEC_NOT_FIRST) ) { | |
ed252734 | 2119 | RX_MATCH_COPY_FREE(prog); |
d6a28714 | 2120 | if (flags & REXEC_COPY_STR) { |
be8e71aa | 2121 | const I32 i = PL_regeol - startpos + (stringarg - strbeg); |
f8c7b90f | 2122 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2123 | if ((SvIsCOW(sv) |
2124 | || (SvFLAGS(sv) & CAN_COW_MASK) == CAN_COW_FLAGS)) { | |
2125 | if (DEBUG_C_TEST) { | |
2126 | PerlIO_printf(Perl_debug_log, | |
2127 | "Copy on write: regexp capture, type %d\n", | |
2128 | (int) SvTYPE(sv)); | |
2129 | } | |
2130 | prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv); | |
d5263905 | 2131 | prog->subbeg = (char *)SvPVX_const(prog->saved_copy); |
ed252734 NC |
2132 | assert (SvPOKp(prog->saved_copy)); |
2133 | } else | |
2134 | #endif | |
2135 | { | |
2136 | RX_MATCH_COPIED_on(prog); | |
2137 | s = savepvn(strbeg, i); | |
2138 | prog->subbeg = s; | |
2139 | } | |
d6a28714 | 2140 | prog->sublen = i; |
d6a28714 JH |
2141 | } |
2142 | else { | |
2143 | prog->subbeg = strbeg; | |
2144 | prog->sublen = PL_regeol - strbeg; /* strend may have been modified */ | |
2145 | } | |
2146 | } | |
9041c2e3 | 2147 | |
d6a28714 JH |
2148 | return 1; |
2149 | ||
2150 | phooey: | |
a3621e74 | 2151 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n", |
e4584336 | 2152 | PL_colors[4], PL_colors[5])); |
d6a28714 | 2153 | if (PL_reg_eval_set) |
4f639d21 | 2154 | restore_pos(aTHX_ prog); |
fae667d5 | 2155 | if (swap_on_fail) |
c74340f9 | 2156 | /* we failed :-( roll it back */ |
fae667d5 YO |
2157 | swap_match_buff(prog); |
2158 | ||
d6a28714 JH |
2159 | return 0; |
2160 | } | |
2161 | ||
6bda09f9 | 2162 | |
d6a28714 JH |
2163 | /* |
2164 | - regtry - try match at specific point | |
2165 | */ | |
2166 | STATIC I32 /* 0 failure, 1 success */ | |
24b23f37 | 2167 | S_regtry(pTHX_ regmatch_info *reginfo, char **startpos) |
d6a28714 | 2168 | { |
97aff369 | 2169 | dVAR; |
d6a28714 | 2170 | CHECKPOINT lastcp; |
3b0527fe | 2171 | regexp *prog = reginfo->prog; |
f8fc2ecf | 2172 | RXi_GET_DECL(prog,progi); |
a3621e74 | 2173 | GET_RE_DEBUG_FLAGS_DECL; |
24b23f37 | 2174 | reginfo->cutpoint=NULL; |
d6a28714 | 2175 | |
bbe252da | 2176 | if ((prog->extflags & RXf_EVAL_SEEN) && !PL_reg_eval_set) { |
d6a28714 JH |
2177 | MAGIC *mg; |
2178 | ||
2179 | PL_reg_eval_set = RS_init; | |
a3621e74 | 2180 | DEBUG_EXECUTE_r(DEBUG_s( |
b900a521 JH |
2181 | PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n", |
2182 | (IV)(PL_stack_sp - PL_stack_base)); | |
d6a28714 | 2183 | )); |
ea8d6ae1 | 2184 | SAVESTACK_CXPOS(); |
d6a28714 JH |
2185 | cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base; |
2186 | /* Otherwise OP_NEXTSTATE will free whatever on stack now. */ | |
2187 | SAVETMPS; | |
2188 | /* Apparently this is not needed, judging by wantarray. */ | |
e8347627 | 2189 | /* SAVEI8(cxstack[cxstack_ix].blk_gimme); |
d6a28714 JH |
2190 | cxstack[cxstack_ix].blk_gimme = G_SCALAR; */ |
2191 | ||
3b0527fe | 2192 | if (reginfo->sv) { |
d6a28714 | 2193 | /* Make $_ available to executed code. */ |
3b0527fe | 2194 | if (reginfo->sv != DEFSV) { |
59f00321 | 2195 | SAVE_DEFSV; |
3b0527fe | 2196 | DEFSV = reginfo->sv; |
b8c5462f | 2197 | } |
d6a28714 | 2198 | |
3b0527fe DM |
2199 | if (!(SvTYPE(reginfo->sv) >= SVt_PVMG && SvMAGIC(reginfo->sv) |
2200 | && (mg = mg_find(reginfo->sv, PERL_MAGIC_regex_global)))) { | |
d6a28714 | 2201 | /* prepare for quick setting of pos */ |
d300d9fa | 2202 | #ifdef PERL_OLD_COPY_ON_WRITE |
51a9ea20 NC |
2203 | if (SvIsCOW(reginfo->sv)) |
2204 | sv_force_normal_flags(reginfo->sv, 0); | |
d300d9fa | 2205 | #endif |
3dab1dad | 2206 | mg = sv_magicext(reginfo->sv, NULL, PERL_MAGIC_regex_global, |
d300d9fa | 2207 | &PL_vtbl_mglob, NULL, 0); |
d6a28714 | 2208 | mg->mg_len = -1; |
b8c5462f | 2209 | } |
d6a28714 JH |
2210 | PL_reg_magic = mg; |
2211 | PL_reg_oldpos = mg->mg_len; | |
4f639d21 | 2212 | SAVEDESTRUCTOR_X(restore_pos, prog); |
d6a28714 | 2213 | } |
09687e5a | 2214 | if (!PL_reg_curpm) { |
a02a5408 | 2215 | Newxz(PL_reg_curpm, 1, PMOP); |
09687e5a AB |
2216 | #ifdef USE_ITHREADS |
2217 | { | |
be8e71aa | 2218 | SV* const repointer = newSViv(0); |
577e12cc | 2219 | /* so we know which PL_regex_padav element is PL_reg_curpm */ |
35061a7e | 2220 | SvFLAGS(repointer) |= SVf_BREAK; |
09687e5a AB |
2221 | av_push(PL_regex_padav,repointer); |
2222 | PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav); | |
2223 | PL_regex_pad = AvARRAY(PL_regex_padav); | |
2224 | } | |
2225 | #endif | |
2226 | } | |
aaa362c4 | 2227 | PM_SETRE(PL_reg_curpm, prog); |
d6a28714 JH |
2228 | PL_reg_oldcurpm = PL_curpm; |
2229 | PL_curpm = PL_reg_curpm; | |
2230 | if (RX_MATCH_COPIED(prog)) { | |
2231 | /* Here is a serious problem: we cannot rewrite subbeg, | |
2232 | since it may be needed if this match fails. Thus | |
2233 | $` inside (?{}) could fail... */ | |
2234 | PL_reg_oldsaved = prog->subbeg; | |
2235 | PL_reg_oldsavedlen = prog->sublen; | |
f8c7b90f | 2236 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2237 | PL_nrs = prog->saved_copy; |
2238 | #endif | |
d6a28714 JH |
2239 | RX_MATCH_COPIED_off(prog); |
2240 | } | |
2241 | else | |
bd61b366 | 2242 | PL_reg_oldsaved = NULL; |
d6a28714 JH |
2243 | prog->subbeg = PL_bostr; |
2244 | prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */ | |
2245 | } | |
24b23f37 | 2246 | DEBUG_EXECUTE_r(PL_reg_starttry = *startpos); |
f0ab9afb | 2247 | prog->offs[0].start = *startpos - PL_bostr; |
24b23f37 | 2248 | PL_reginput = *startpos; |
d6a28714 | 2249 | PL_reglastparen = &prog->lastparen; |
a01268b5 | 2250 | PL_reglastcloseparen = &prog->lastcloseparen; |
d6a28714 | 2251 | prog->lastparen = 0; |
03994de8 | 2252 | prog->lastcloseparen = 0; |
d6a28714 | 2253 | PL_regsize = 0; |
f0ab9afb | 2254 | PL_regoffs = prog->offs; |
d6a28714 JH |
2255 | if (PL_reg_start_tmpl <= prog->nparens) { |
2256 | PL_reg_start_tmpl = prog->nparens*3/2 + 3; | |
2257 | if(PL_reg_start_tmp) | |
2258 | Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*); | |
2259 | else | |
a02a5408 | 2260 | Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*); |
d6a28714 JH |
2261 | } |
2262 | ||
2263 | /* XXXX What this code is doing here?!!! There should be no need | |
2264 | to do this again and again, PL_reglastparen should take care of | |
3dd2943c | 2265 | this! --ilya*/ |
dafc8851 JH |
2266 | |
2267 | /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code. | |
2268 | * Actually, the code in regcppop() (which Ilya may be meaning by | |
daf18116 JH |
2269 | * PL_reglastparen), is not needed at all by the test suite |
2270 | * (op/regexp, op/pat, op/split), but that code is needed, oddly | |
2271 | * enough, for building DynaLoader, or otherwise this | |
2272 | * "Error: '*' not in typemap in DynaLoader.xs, line 164" | |
2273 | * will happen. Meanwhile, this code *is* needed for the | |
2274 | * above-mentioned test suite tests to succeed. The common theme | |
2275 | * on those tests seems to be returning null fields from matches. | |
2276 | * --jhi */ | |
dafc8851 | 2277 | #if 1 |
d6a28714 | 2278 | if (prog->nparens) { |
f0ab9afb | 2279 | regexp_paren_pair *pp = PL_regoffs; |
097eb12c | 2280 | register I32 i; |
eb160463 | 2281 | for (i = prog->nparens; i > (I32)*PL_reglastparen; i--) { |
f0ab9afb NC |
2282 | ++pp; |
2283 | pp->start = -1; | |
2284 | pp->end = -1; | |
d6a28714 JH |
2285 | } |
2286 | } | |
dafc8851 | 2287 | #endif |
02db2b7b | 2288 | REGCP_SET(lastcp); |
f8fc2ecf | 2289 | if (regmatch(reginfo, progi->program + 1)) { |
f0ab9afb | 2290 | PL_regoffs[0].end = PL_reginput - PL_bostr; |
d6a28714 JH |
2291 | return 1; |
2292 | } | |
24b23f37 YO |
2293 | if (reginfo->cutpoint) |
2294 | *startpos= reginfo->cutpoint; | |
02db2b7b | 2295 | REGCP_UNWIND(lastcp); |
d6a28714 JH |
2296 | return 0; |
2297 | } | |
2298 | ||
02db2b7b | 2299 | |
8ba1375e MJD |
2300 | #define sayYES goto yes |
2301 | #define sayNO goto no | |
262b90c4 | 2302 | #define sayNO_SILENT goto no_silent |
8ba1375e | 2303 | |
f9f4320a YO |
2304 | /* we dont use STMT_START/END here because it leads to |
2305 | "unreachable code" warnings, which are bogus, but distracting. */ | |
2306 | #define CACHEsayNO \ | |
c476f425 DM |
2307 | if (ST.cache_mask) \ |
2308 | PL_reg_poscache[ST.cache_offset] |= ST.cache_mask; \ | |
f9f4320a | 2309 | sayNO |
3298f257 | 2310 | |
a3621e74 | 2311 | /* this is used to determine how far from the left messages like |
265c4333 YO |
2312 | 'failed...' are printed. It should be set such that messages |
2313 | are inline with the regop output that created them. | |
a3621e74 | 2314 | */ |
265c4333 | 2315 | #define REPORT_CODE_OFF 32 |
a3621e74 YO |
2316 | |
2317 | ||
2318 | /* Make sure there is a test for this +1 options in re_tests */ | |
2319 | #define TRIE_INITAL_ACCEPT_BUFFLEN 4; | |
2320 | ||
40a82448 DM |
2321 | #define CHRTEST_UNINIT -1001 /* c1/c2 haven't been calculated yet */ |
2322 | #define CHRTEST_VOID -1000 /* the c1/c2 "next char" test should be skipped */ | |
9e137952 | 2323 | |
86545054 DM |
2324 | #define SLAB_FIRST(s) (&(s)->states[0]) |
2325 | #define SLAB_LAST(s) (&(s)->states[PERL_REGMATCH_SLAB_SLOTS-1]) | |
2326 | ||
5d9a96ca DM |
2327 | /* grab a new slab and return the first slot in it */ |
2328 | ||
2329 | STATIC regmatch_state * | |
2330 | S_push_slab(pTHX) | |
2331 | { | |
a35a87e7 | 2332 | #if PERL_VERSION < 9 && !defined(PERL_CORE) |
54df2634 NC |
2333 | dMY_CXT; |
2334 | #endif | |
5d9a96ca DM |
2335 | regmatch_slab *s = PL_regmatch_slab->next; |
2336 | if (!s) { | |
2337 | Newx(s, 1, regmatch_slab); | |
2338 | s->prev = PL_regmatch_slab; | |
2339 | s->next = NULL; | |
2340 | PL_regmatch_slab->next = s; | |
2341 | } | |
2342 | PL_regmatch_slab = s; | |
86545054 | 2343 | return SLAB_FIRST(s); |
5d9a96ca | 2344 | } |
5b47454d | 2345 | |
95b24440 | 2346 | |
40a82448 DM |
2347 | /* push a new state then goto it */ |
2348 | ||
2349 | #define PUSH_STATE_GOTO(state, node) \ | |
2350 | scan = node; \ | |
2351 | st->resume_state = state; \ | |
2352 | goto push_state; | |
2353 | ||
2354 | /* push a new state with success backtracking, then goto it */ | |
2355 | ||
2356 | #define PUSH_YES_STATE_GOTO(state, node) \ | |
2357 | scan = node; \ | |
2358 | st->resume_state = state; \ | |
2359 | goto push_yes_state; | |
2360 | ||
aa283a38 | 2361 | |
aa283a38 | 2362 | |
d6a28714 | 2363 | /* |
95b24440 | 2364 | |
bf1f174e DM |
2365 | regmatch() - main matching routine |
2366 | ||
2367 | This is basically one big switch statement in a loop. We execute an op, | |
2368 | set 'next' to point the next op, and continue. If we come to a point which | |
2369 | we may need to backtrack to on failure such as (A|B|C), we push a | |
2370 | backtrack state onto the backtrack stack. On failure, we pop the top | |
2371 | state, and re-enter the loop at the state indicated. If there are no more | |
2372 | states to pop, we return failure. | |
2373 | ||
2374 | Sometimes we also need to backtrack on success; for example /A+/, where | |
2375 | after successfully matching one A, we need to go back and try to | |
2376 | match another one; similarly for lookahead assertions: if the assertion | |
2377 | completes successfully, we backtrack to the state just before the assertion | |
2378 | and then carry on. In these cases, the pushed state is marked as | |
2379 | 'backtrack on success too'. This marking is in fact done by a chain of | |
2380 | pointers, each pointing to the previous 'yes' state. On success, we pop to | |
2381 | the nearest yes state, discarding any intermediate failure-only states. | |
2382 | Sometimes a yes state is pushed just to force some cleanup code to be | |
2383 | called at the end of a successful match or submatch; e.g. (??{$re}) uses | |
2384 | it to free the inner regex. | |
2385 | ||
2386 | Note that failure backtracking rewinds the cursor position, while | |
2387 | success backtracking leaves it alone. | |
2388 | ||
2389 | A pattern is complete when the END op is executed, while a subpattern | |
2390 | such as (?=foo) is complete when the SUCCESS op is executed. Both of these | |
2391 | ops trigger the "pop to last yes state if any, otherwise return true" | |
2392 | behaviour. | |
2393 | ||
2394 | A common convention in this function is to use A and B to refer to the two | |
2395 | subpatterns (or to the first nodes thereof) in patterns like /A*B/: so A is | |
2396 | the subpattern to be matched possibly multiple times, while B is the entire | |
2397 | rest of the pattern. Variable and state names reflect this convention. | |
2398 | ||
2399 | The states in the main switch are the union of ops and failure/success of | |
2400 | substates associated with with that op. For example, IFMATCH is the op | |
2401 | that does lookahead assertions /(?=A)B/ and so the IFMATCH state means | |
2402 | 'execute IFMATCH'; while IFMATCH_A is a state saying that we have just | |
2403 | successfully matched A and IFMATCH_A_fail is a state saying that we have | |
2404 | just failed to match A. Resume states always come in pairs. The backtrack | |
2405 | state we push is marked as 'IFMATCH_A', but when that is popped, we resume | |
2406 | at IFMATCH_A or IFMATCH_A_fail, depending on whether we are backtracking | |
2407 | on success or failure. | |
2408 | ||
2409 | The struct that holds a backtracking state is actually a big union, with | |
2410 | one variant for each major type of op. The variable st points to the | |
2411 | top-most backtrack struct. To make the code clearer, within each | |
2412 | block of code we #define ST to alias the relevant union. | |
2413 | ||
2414 | Here's a concrete example of a (vastly oversimplified) IFMATCH | |
2415 | implementation: | |
2416 | ||
2417 | switch (state) { | |
2418 | .... | |
2419 | ||
2420 | #define ST st->u.ifmatch | |
2421 | ||
2422 | case IFMATCH: // we are executing the IFMATCH op, (?=A)B | |
2423 | ST.foo = ...; // some state we wish to save | |
95b24440 | 2424 | ... |
bf1f174e DM |
2425 | // push a yes backtrack state with a resume value of |
2426 | // IFMATCH_A/IFMATCH_A_fail, then continue execution at the | |
2427 | // first node of A: | |
2428 | PUSH_YES_STATE_GOTO(IFMATCH_A, A); | |
2429 | // NOTREACHED | |
2430 | ||
2431 | case IFMATCH_A: // we have successfully executed A; now continue with B | |
2432 | next = B; | |
2433 | bar = ST.foo; // do something with the preserved value | |
2434 | break; | |
2435 | ||
2436 | case IFMATCH_A_fail: // A failed, so the assertion failed | |
2437 | ...; // do some housekeeping, then ... | |
2438 | sayNO; // propagate the failure | |
2439 | ||
2440 | #undef ST | |
95b24440 | 2441 | |
bf1f174e DM |
2442 | ... |
2443 | } | |
95b24440 | 2444 | |
bf1f174e DM |
2445 | For any old-timers reading this who are familiar with the old recursive |
2446 | approach, the code above is equivalent to: | |
95b24440 | 2447 | |
bf1f174e DM |
2448 | case IFMATCH: // we are executing the IFMATCH op, (?=A)B |
2449 | { | |
2450 | int foo = ... | |
95b24440 | 2451 | ... |
bf1f174e DM |
2452 | if (regmatch(A)) { |
2453 | next = B; | |
2454 | bar = foo; | |
2455 | break; | |
95b24440 | 2456 | } |
bf1f174e DM |
2457 | ...; // do some housekeeping, then ... |
2458 | sayNO; // propagate the failure | |
95b24440 | 2459 | } |
bf1f174e DM |
2460 | |
2461 | The topmost backtrack state, pointed to by st, is usually free. If you | |
2462 | want to claim it, populate any ST.foo fields in it with values you wish to | |
2463 | save, then do one of | |
2464 | ||
2465 | PUSH_STATE_GOTO(resume_state, node); | |
2466 | PUSH_YES_STATE_GOTO(resume_state, node); | |
2467 | ||
2468 | which sets that backtrack state's resume value to 'resume_state', pushes a | |
2469 | new free entry to the top of the backtrack stack, then goes to 'node'. | |
2470 | On backtracking, the free slot is popped, and the saved state becomes the | |
2471 | new free state. An ST.foo field in this new top state can be temporarily | |
2472 | accessed to retrieve values, but once the main loop is re-entered, it | |
2473 | becomes available for reuse. | |
2474 | ||
2475 | Note that the depth of the backtrack stack constantly increases during the | |
2476 | left-to-right execution of the pattern, rather than going up and down with | |
2477 | the pattern nesting. For example the stack is at its maximum at Z at the | |
2478 | end of the pattern, rather than at X in the following: | |
2479 | ||
2480 | /(((X)+)+)+....(Y)+....Z/ | |
2481 | ||
2482 | The only exceptions to this are lookahead/behind assertions and the cut, | |
2483 | (?>A), which pop all the backtrack states associated with A before | |
2484 | continuing. | |
2485 | ||
2486 | Bascktrack state structs are allocated in slabs of about 4K in size. | |
2487 | PL_regmatch_state and st always point to the currently active state, | |
2488 | and PL_regmatch_slab points to the slab currently containing | |
2489 | PL_regmatch_state. The first time regmatch() is called, the first slab is | |
2490 | allocated, and is never freed until interpreter destruction. When the slab | |
2491 | is full, a new one is allocated and chained to the end. At exit from | |
2492 | regmatch(), slabs allocated since entry are freed. | |
2493 | ||
2494 | */ | |
95b24440 | 2495 | |
40a82448 | 2496 | |
5bc10b2c | 2497 | #define DEBUG_STATE_pp(pp) \ |
265c4333 | 2498 | DEBUG_STATE_r({ \ |
5bc10b2c DM |
2499 | DUMP_EXEC_POS(locinput, scan, do_utf8); \ |
2500 | PerlIO_printf(Perl_debug_log, \ | |
5d458dd8 | 2501 | " %*s"pp" %s%s%s%s%s\n", \ |
5bc10b2c | 2502 | depth*2, "", \ |
13d6edb4 | 2503 | PL_reg_name[st->resume_state], \ |
5d458dd8 YO |
2504 | ((st==yes_state||st==mark_state) ? "[" : ""), \ |
2505 | ((st==yes_state) ? "Y" : ""), \ | |
2506 | ((st==mark_state) ? "M" : ""), \ | |
2507 | ((st==yes_state||st==mark_state) ? "]" : "") \ | |
2508 | ); \ | |
265c4333 | 2509 | }); |
5bc10b2c | 2510 | |
40a82448 | 2511 | |
3dab1dad | 2512 | #define REG_NODE_NUM(x) ((x) ? (int)((x)-prog) : -1) |
95b24440 | 2513 | |
3df15adc | 2514 | #ifdef DEBUGGING |
5bc10b2c | 2515 | |
ab3bbdeb YO |
2516 | STATIC void |
2517 | S_debug_start_match(pTHX_ const regexp *prog, const bool do_utf8, | |
2518 | const char *start, const char *end, const char *blurb) | |
2519 | { | |
bbe252da | 2520 | const bool utf8_pat= prog->extflags & RXf_UTF8 ? 1 : 0; |
ab3bbdeb YO |
2521 | if (!PL_colorset) |
2522 | reginitcolors(); | |
2523 | { | |
2524 | RE_PV_QUOTED_DECL(s0, utf8_pat, PERL_DEBUG_PAD_ZERO(0), | |
2525 | prog->precomp, prog->prelen, 60); | |
2526 | ||
2527 | RE_PV_QUOTED_DECL(s1, do_utf8, PERL_DEBUG_PAD_ZERO(1), | |
2528 | start, end - start, 60); | |
2529 | ||
2530 | PerlIO_printf(Perl_debug_log, | |
2531 | "%s%s REx%s %s against %s\n", | |
2532 | PL_colors[4], blurb, PL_colors[5], s0, s1); | |
2533 | ||
2534 | if (do_utf8||utf8_pat) | |
1de06328 YO |
2535 | PerlIO_printf(Perl_debug_log, "UTF-8 %s%s%s...\n", |
2536 | utf8_pat ? "pattern" : "", | |
2537 | utf8_pat && do_utf8 ? " and " : "", | |
2538 | do_utf8 ? "string" : "" | |
ab3bbdeb YO |
2539 | ); |
2540 | } | |
2541 | } | |
3df15adc YO |
2542 | |
2543 | STATIC void | |
786e8c11 YO |
2544 | S_dump_exec_pos(pTHX_ const char *locinput, |
2545 | const regnode *scan, | |
2546 | const char *loc_regeol, | |
2547 | const char *loc_bostr, | |
2548 | const char *loc_reg_starttry, | |
2549 | const bool do_utf8) | |
07be1b83 | 2550 | { |
786e8c11 | 2551 | const int docolor = *PL_colors[0] || *PL_colors[2] || *PL_colors[4]; |
07be1b83 | 2552 | const int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */ |
786e8c11 | 2553 | int l = (loc_regeol - locinput) > taill ? taill : (loc_regeol - locinput); |
07be1b83 YO |
2554 | /* The part of the string before starttry has one color |
2555 | (pref0_len chars), between starttry and current | |
2556 | position another one (pref_len - pref0_len chars), | |
2557 | after the current position the third one. | |
2558 | We assume that pref0_len <= pref_len, otherwise we | |
2559 | decrease pref0_len. */ | |
786e8c11 YO |
2560 | int pref_len = (locinput - loc_bostr) > (5 + taill) - l |
2561 | ? (5 + taill) - l : locinput - loc_bostr; | |
07be1b83 YO |
2562 | int pref0_len; |
2563 | ||
2564 | while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len))) | |
2565 | pref_len++; | |
786e8c11 YO |
2566 | pref0_len = pref_len - (locinput - loc_reg_starttry); |
2567 | if (l + pref_len < (5 + taill) && l < loc_regeol - locinput) | |
2568 | l = ( loc_regeol - locinput > (5 + taill) - pref_len | |
2569 | ? (5 + taill) - pref_len : loc_regeol - locinput); | |
07be1b83 YO |
2570 | while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput + l))) |
2571 | l--; | |
2572 | if (pref0_len < 0) | |
2573 | pref0_len = 0; | |
2574 | if (pref0_len > pref_len) | |
2575 | pref0_len = pref_len; | |
2576 | { | |
3df15adc | 2577 | const int is_uni = (do_utf8 && OP(scan) != CANY) ? 1 : 0; |
0df25f3d | 2578 | |
ab3bbdeb | 2579 | RE_PV_COLOR_DECL(s0,len0,is_uni,PERL_DEBUG_PAD(0), |
1de06328 | 2580 | (locinput - pref_len),pref0_len, 60, 4, 5); |
0df25f3d | 2581 | |
ab3bbdeb | 2582 | RE_PV_COLOR_DECL(s1,len1,is_uni,PERL_DEBUG_PAD(1), |
3df15adc | 2583 | (locinput - pref_len + pref0_len), |
1de06328 | 2584 | pref_len - pref0_len, 60, 2, 3); |
0df25f3d | 2585 | |
ab3bbdeb | 2586 | RE_PV_COLOR_DECL(s2,len2,is_uni,PERL_DEBUG_PAD(2), |
1de06328 | 2587 | locinput, loc_regeol - locinput, 10, 0, 1); |
0df25f3d | 2588 | |
1de06328 | 2589 | const STRLEN tlen=len0+len1+len2; |
3df15adc | 2590 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb | 2591 | "%4"IVdf" <%.*s%.*s%s%.*s>%*s|", |
786e8c11 | 2592 | (IV)(locinput - loc_bostr), |
07be1b83 | 2593 | len0, s0, |
07be1b83 | 2594 | len1, s1, |
07be1b83 | 2595 | (docolor ? "" : "> <"), |
07be1b83 | 2596 | len2, s2, |
f9f4320a | 2597 | (int)(tlen > 19 ? 0 : 19 - tlen), |
07be1b83 YO |
2598 | ""); |
2599 | } | |
2600 | } | |
3df15adc | 2601 | |
07be1b83 YO |
2602 | #endif |
2603 | ||
0a4db386 YO |
2604 | /* reg_check_named_buff_matched() |
2605 | * Checks to see if a named buffer has matched. The data array of | |
2606 | * buffer numbers corresponding to the buffer is expected to reside | |
2607 | * in the regexp->data->data array in the slot stored in the ARG() of | |
2608 | * node involved. Note that this routine doesn't actually care about the | |
2609 | * name, that information is not preserved from compilation to execution. | |
2610 | * Returns the index of the leftmost defined buffer with the given name | |
2611 | * or 0 if non of the buffers matched. | |
2612 | */ | |
2613 | STATIC I32 | |
2614 | S_reg_check_named_buff_matched(pTHX_ const regexp *rex, const regnode *scan) { | |
2615 | I32 n; | |
f8fc2ecf YO |
2616 | RXi_GET_DECL(rex,rexi); |
2617 | SV *sv_dat=(SV*)rexi->data->data[ ARG( scan ) ]; | |
0a4db386 YO |
2618 | I32 *nums=(I32*)SvPVX(sv_dat); |
2619 | for ( n=0; n<SvIVX(sv_dat); n++ ) { | |
2620 | if ((I32)*PL_reglastparen >= nums[n] && | |
f0ab9afb | 2621 | PL_regoffs[nums[n]].end != -1) |
0a4db386 YO |
2622 | { |
2623 | return nums[n]; | |
2624 | } | |
2625 | } | |
2626 | return 0; | |
2627 | } | |
2628 | ||
2f554ef7 DM |
2629 | |
2630 | /* free all slabs above current one - called during LEAVE_SCOPE */ | |
2631 | ||
2632 | STATIC void | |
2633 | S_clear_backtrack_stack(pTHX_ void *p) | |
2634 | { | |
2635 | regmatch_slab *s = PL_regmatch_slab->next; | |
2636 | PERL_UNUSED_ARG(p); | |
2637 | ||
2638 | if (!s) | |
2639 | return; | |
2640 | PL_regmatch_slab->next = NULL; | |
2641 | while (s) { | |
2642 | regmatch_slab * const osl = s; | |
2643 | s = s->next; | |
2644 | Safefree(osl); | |
2645 | } | |
2646 | } | |
2647 | ||
2648 | ||
28d8d7f4 YO |
2649 | #define SETREX(Re1,Re2) \ |
2650 | if (PL_reg_eval_set) PM_SETRE((PL_reg_curpm), (Re2)); \ | |
2651 | Re1 = (Re2) | |
2652 | ||
d6a28714 | 2653 | STATIC I32 /* 0 failure, 1 success */ |
24b23f37 | 2654 | S_regmatch(pTHX_ regmatch_info *reginfo, regnode *prog) |
d6a28714 | 2655 | { |
a35a87e7 | 2656 | #if PERL_VERSION < 9 && !defined(PERL_CORE) |
54df2634 NC |
2657 | dMY_CXT; |
2658 | #endif | |
27da23d5 | 2659 | dVAR; |
95b24440 | 2660 | register const bool do_utf8 = PL_reg_match_utf8; |
4ad0818d | 2661 | const U32 uniflags = UTF8_ALLOW_DEFAULT; |
95b24440 | 2662 | |
3b0527fe | 2663 | regexp *rex = reginfo->prog; |
f8fc2ecf YO |
2664 | RXi_GET_DECL(rex,rexi); |
2665 | ||
2f554ef7 | 2666 | I32 oldsave; |
a3621e74 | 2667 | |
5d9a96ca DM |
2668 | /* the current state. This is a cached copy of PL_regmatch_state */ |
2669 | register regmatch_state *st; | |
95b24440 | 2670 | |
5d9a96ca DM |
2671 | /* cache heavy used fields of st in registers */ |
2672 | register regnode *scan; | |
2673 | register regnode *next; | |
438e9bae | 2674 | register U32 n = 0; /* general value; init to avoid compiler warning */ |
24d3c4a9 | 2675 | register I32 ln = 0; /* len or last; init to avoid compiler warning */ |
5d9a96ca | 2676 | register char *locinput = PL_reginput; |
5d9a96ca | 2677 | register I32 nextchr; /* is always set to UCHARAT(locinput) */ |
24d3c4a9 | 2678 | |
b69b0499 | 2679 | bool result = 0; /* return value of S_regmatch */ |
24d3c4a9 | 2680 | int depth = 0; /* depth of backtrack stack */ |
4b196cd4 YO |
2681 | U32 nochange_depth = 0; /* depth of GOSUB recursion with nochange */ |
2682 | const U32 max_nochange_depth = | |
2683 | (3 * rex->nparens > MAX_RECURSE_EVAL_NOCHANGE_DEPTH) ? | |
2684 | 3 * rex->nparens : MAX_RECURSE_EVAL_NOCHANGE_DEPTH; | |
2685 | ||
77cb431f DM |
2686 | regmatch_state *yes_state = NULL; /* state to pop to on success of |
2687 | subpattern */ | |
e2e6a0f1 YO |
2688 | /* mark_state piggy backs on the yes_state logic so that when we unwind |
2689 | the stack on success we can update the mark_state as we go */ | |
2690 | regmatch_state *mark_state = NULL; /* last mark state we have seen */ | |
5d458dd8 | 2691 | |
faec1544 | 2692 | regmatch_state *cur_eval = NULL; /* most recent EVAL_AB state */ |
b8591aee | 2693 | struct regmatch_state *cur_curlyx = NULL; /* most recent curlyx */ |
40a82448 | 2694 | U32 state_num; |
5d458dd8 YO |
2695 | bool no_final = 0; /* prevent failure from backtracking? */ |
2696 | bool do_cutgroup = 0; /* no_final only until next branch/trie entry */ | |
e2e6a0f1 | 2697 | char *startpoint = PL_reginput; |
5d458dd8 YO |
2698 | SV *popmark = NULL; /* are we looking for a mark? */ |
2699 | SV *sv_commit = NULL; /* last mark name seen in failure */ | |
2700 | SV *sv_yes_mark = NULL; /* last mark name we have seen | |
2701 | during a successfull match */ | |
2702 | U32 lastopen = 0; /* last open we saw */ | |
2703 | bool has_cutgroup = RX_HAS_CUTGROUP(rex) ? 1 : 0; | |
19b95bf0 DM |
2704 | |
2705 | SV* const oreplsv = GvSV(PL_replgv); | |
58e23c8d | 2706 | |
5d458dd8 | 2707 | |
24d3c4a9 DM |
2708 | /* these three flags are set by various ops to signal information to |
2709 | * the very next op. They have a useful lifetime of exactly one loop | |
2710 | * iteration, and are not preserved or restored by state pushes/pops | |
2711 | */ | |
2712 | bool sw = 0; /* the condition value in (?(cond)a|b) */ | |
2713 | bool minmod = 0; /* the next "{n,m}" is a "{n,m}?" */ | |
2714 | int logical = 0; /* the following EVAL is: | |
2715 | 0: (?{...}) | |
2716 | 1: (?(?{...})X|Y) | |
2717 | 2: (??{...}) | |
2718 | or the following IFMATCH/UNLESSM is: | |
2719 | false: plain (?=foo) | |
2720 | true: used as a condition: (?(?=foo)) | |
2721 | */ | |
2722 | ||
95b24440 | 2723 | #ifdef DEBUGGING |
e68ec53f | 2724 | GET_RE_DEBUG_FLAGS_DECL; |
d6a28714 JH |
2725 | #endif |
2726 | ||
3b57cd43 | 2727 | DEBUG_OPTIMISE_r( DEBUG_EXECUTE_r({ |
24b23f37 | 2728 | PerlIO_printf(Perl_debug_log,"regmatch start\n"); |
3b57cd43 | 2729 | })); |
5d9a96ca DM |
2730 | /* on first ever call to regmatch, allocate first slab */ |
2731 | if (!PL_regmatch_slab) { | |
2732 | Newx(PL_regmatch_slab, 1, regmatch_slab); | |
2733 | PL_regmatch_slab->prev = NULL; | |
2734 | PL_regmatch_slab->next = NULL; | |
86545054 | 2735 | PL_regmatch_state = SLAB_FIRST(PL_regmatch_slab); |
5d9a96ca DM |
2736 | } |
2737 | ||
2f554ef7 DM |
2738 | oldsave = PL_savestack_ix; |
2739 | SAVEDESTRUCTOR_X(S_clear_backtrack_stack, NULL); | |
2740 | SAVEVPTR(PL_regmatch_slab); | |
2741 | SAVEVPTR(PL_regmatch_state); | |
5d9a96ca DM |
2742 | |
2743 | /* grab next free state slot */ | |
2744 | st = ++PL_regmatch_state; | |
86545054 | 2745 | if (st > SLAB_LAST(PL_regmatch_slab)) |
5d9a96ca DM |
2746 | st = PL_regmatch_state = S_push_slab(aTHX); |
2747 | ||
d6a28714 JH |
2748 | /* Note that nextchr is a byte even in UTF */ |
2749 | nextchr = UCHARAT(locinput); | |
2750 | scan = prog; | |
2751 | while (scan != NULL) { | |
8ba1375e | 2752 | |
a3621e74 | 2753 | DEBUG_EXECUTE_r( { |
6136c704 | 2754 | SV * const prop = sv_newmortal(); |
1de06328 | 2755 | regnode *rnext=regnext(scan); |
786e8c11 | 2756 | DUMP_EXEC_POS( locinput, scan, do_utf8 ); |
32fc9b6a | 2757 | regprop(rex, prop, scan); |
07be1b83 YO |
2758 | |
2759 | PerlIO_printf(Perl_debug_log, | |
2760 | "%3"IVdf":%*s%s(%"IVdf")\n", | |
f8fc2ecf | 2761 | (IV)(scan - rexi->program), depth*2, "", |
07be1b83 | 2762 | SvPVX_const(prop), |
1de06328 | 2763 | (PL_regkind[OP(scan)] == END || !rnext) ? |
f8fc2ecf | 2764 | 0 : (IV)(rnext - rexi->program)); |
2a782b5b | 2765 | }); |
d6a28714 JH |
2766 | |
2767 | next = scan + NEXT_OFF(scan); | |
2768 | if (next == scan) | |
2769 | next = NULL; | |
40a82448 | 2770 | state_num = OP(scan); |
d6a28714 | 2771 | |
40a82448 DM |
2772 | reenter_switch: |
2773 | switch (state_num) { | |
d6a28714 | 2774 | case BOL: |
7fba1cd6 | 2775 | if (locinput == PL_bostr) |
d6a28714 | 2776 | { |
3b0527fe | 2777 | /* reginfo->till = reginfo->bol; */ |
b8c5462f JH |
2778 | break; |
2779 | } | |
d6a28714 JH |
2780 | sayNO; |
2781 | case MBOL: | |
12d33761 HS |
2782 | if (locinput == PL_bostr || |
2783 | ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n')) | |
d6a28714 | 2784 | { |
b8c5462f JH |
2785 | break; |
2786 | } | |
d6a28714 JH |
2787 | sayNO; |
2788 | case SBOL: | |
c2a73568 | 2789 | if (locinput == PL_bostr) |
b8c5462f | 2790 | break; |
d6a28714 JH |
2791 | sayNO; |
2792 | case GPOS: | |
3b0527fe | 2793 | if (locinput == reginfo->ganch) |
d6a28714 JH |
2794 | break; |
2795 | sayNO; | |
ee9b8eae YO |
2796 | |
2797 | case KEEPS: | |
2798 | /* update the startpoint */ | |
f0ab9afb | 2799 | st->u.keeper.val = PL_regoffs[0].start; |
ee9b8eae | 2800 | PL_reginput = locinput; |
f0ab9afb | 2801 | PL_regoffs[0].start = locinput - PL_bostr; |
ee9b8eae YO |
2802 | PUSH_STATE_GOTO(KEEPS_next, next); |
2803 | /*NOT-REACHED*/ | |
2804 | case KEEPS_next_fail: | |
2805 | /* rollback the start point change */ | |
f0ab9afb | 2806 | PL_regoffs[0].start = st->u.keeper.val; |
ee9b8eae YO |
2807 | sayNO_SILENT; |
2808 | /*NOT-REACHED*/ | |
d6a28714 | 2809 | case EOL: |
d6a28714 JH |
2810 | goto seol; |
2811 | case MEOL: | |
d6a28714 | 2812 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') |
b8c5462f | 2813 | sayNO; |
b8c5462f | 2814 | break; |
d6a28714 JH |
2815 | case SEOL: |
2816 | seol: | |
2817 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') | |
b8c5462f | 2818 | sayNO; |
d6a28714 | 2819 | if (PL_regeol - locinput > 1) |
b8c5462f | 2820 | sayNO; |
b8c5462f | 2821 | break; |
d6a28714 JH |
2822 | case EOS: |
2823 | if (PL_regeol != locinput) | |
b8c5462f | 2824 | sayNO; |
d6a28714 | 2825 | break; |
ffc61ed2 | 2826 | case SANY: |
d6a28714 | 2827 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 | 2828 | sayNO; |
f33976b4 DB |
2829 | if (do_utf8) { |
2830 | locinput += PL_utf8skip[nextchr]; | |
2831 | if (locinput > PL_regeol) | |
2832 | sayNO; | |
2833 | nextchr = UCHARAT(locinput); | |
2834 | } | |
2835 | else | |
2836 | nextchr = UCHARAT(++locinput); | |
2837 | break; | |
2838 | case CANY: | |
2839 | if (!nextchr && locinput >= PL_regeol) | |
2840 | sayNO; | |
b8c5462f | 2841 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 2842 | break; |
ffc61ed2 | 2843 | case REG_ANY: |
1aa99e6b IH |
2844 | if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n') |
2845 | sayNO; | |
2846 | if (do_utf8) { | |
b8c5462f | 2847 | locinput += PL_utf8skip[nextchr]; |
d6a28714 JH |
2848 | if (locinput > PL_regeol) |
2849 | sayNO; | |
a0ed51b3 | 2850 | nextchr = UCHARAT(locinput); |
a0ed51b3 | 2851 | } |
1aa99e6b IH |
2852 | else |
2853 | nextchr = UCHARAT(++locinput); | |
a0ed51b3 | 2854 | break; |
166ba7cd DM |
2855 | |
2856 | #undef ST | |
2857 | #define ST st->u.trie | |
786e8c11 YO |
2858 | case TRIEC: |
2859 | /* In this case the charclass data is available inline so | |
2860 | we can fail fast without a lot of extra overhead. | |
2861 | */ | |
2862 | if (scan->flags == EXACT || !do_utf8) { | |
2863 | if(!ANYOF_BITMAP_TEST(scan, *locinput)) { | |
2864 | DEBUG_EXECUTE_r( | |
2865 | PerlIO_printf(Perl_debug_log, | |
2866 | "%*s %sfailed to match trie start class...%s\n", | |
5bc10b2c | 2867 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]) |
786e8c11 YO |
2868 | ); |
2869 | sayNO_SILENT; | |
2870 | /* NOTREACHED */ | |
2871 | } | |
2872 | } | |
2873 | /* FALL THROUGH */ | |
5b47454d | 2874 | case TRIE: |
3dab1dad | 2875 | { |
07be1b83 | 2876 | /* what type of TRIE am I? (utf8 makes this contextual) */ |
3dab1dad YO |
2877 | const enum { trie_plain, trie_utf8, trie_utf8_fold } |
2878 | trie_type = do_utf8 ? | |
2879 | (scan->flags == EXACT ? trie_utf8 : trie_utf8_fold) | |
2880 | : trie_plain; | |
2881 | ||
2882 | /* what trie are we using right now */ | |
be8e71aa | 2883 | reg_trie_data * const trie |
f8fc2ecf | 2884 | = (reg_trie_data*)rexi->data->data[ ARG( scan ) ]; |
55eed653 | 2885 | HV * widecharmap = (HV *)rexi->data->data[ ARG( scan ) + 1 ]; |
3dab1dad | 2886 | U32 state = trie->startstate; |
166ba7cd | 2887 | |
3dab1dad YO |
2888 | if (trie->bitmap && trie_type != trie_utf8_fold && |
2889 | !TRIE_BITMAP_TEST(trie,*locinput) | |
2890 | ) { | |
2891 | if (trie->states[ state ].wordnum) { | |
2892 | DEBUG_EXECUTE_r( | |
2893 | PerlIO_printf(Perl_debug_log, | |
2894 | "%*s %smatched empty string...%s\n", | |
5bc10b2c | 2895 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]) |
3dab1dad YO |
2896 | ); |
2897 | break; | |
2898 | } else { | |
2899 | DEBUG_EXECUTE_r( | |
2900 | PerlIO_printf(Perl_debug_log, | |
786e8c11 | 2901 | "%*s %sfailed to match trie start class...%s\n", |
5bc10b2c | 2902 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]) |
3dab1dad YO |
2903 | ); |
2904 | sayNO_SILENT; | |
2905 | } | |
2906 | } | |
166ba7cd | 2907 | |
786e8c11 YO |
2908 | { |
2909 | U8 *uc = ( U8* )locinput; | |
2910 | ||
2911 | STRLEN len = 0; | |
2912 | STRLEN foldlen = 0; | |
2913 | U8 *uscan = (U8*)NULL; | |
2914 | STRLEN bufflen=0; | |
2915 | SV *sv_accept_buff = NULL; | |
2916 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; | |
2917 | ||
2918 | ST.accepted = 0; /* how many accepting states we have seen */ | |
2919 | ST.B = next; | |
2920 | ST.jump = trie->jump; | |
786e8c11 | 2921 | ST.me = scan; |
07be1b83 YO |
2922 | /* |
2923 | traverse the TRIE keeping track of all accepting states | |
2924 | we transition through until we get to a failing node. | |
2925 | */ | |
2926 | ||
a3621e74 | 2927 | while ( state && uc <= (U8*)PL_regeol ) { |
786e8c11 | 2928 | U32 base = trie->states[ state ].trans.base; |
f9f4320a | 2929 | UV uvc = 0; |
786e8c11 YO |
2930 | U16 charid; |
2931 | /* We use charid to hold the wordnum as we don't use it | |
2932 | for charid until after we have done the wordnum logic. | |
2933 | We define an alias just so that the wordnum logic reads | |
2934 | more naturally. */ | |
2935 | ||
2936 | #define got_wordnum charid | |
2937 | got_wordnum = trie->states[ state ].wordnum; | |
2938 | ||
2939 | if ( got_wordnum ) { | |
2940 | if ( ! ST.accepted ) { | |
5b47454d DM |
2941 | ENTER; |
2942 | SAVETMPS; | |
2943 | bufflen = TRIE_INITAL_ACCEPT_BUFFLEN; | |
2944 | sv_accept_buff=newSV(bufflen * | |
2945 | sizeof(reg_trie_accepted) - 1); | |
786e8c11 | 2946 | SvCUR_set(sv_accept_buff, 0); |
5b47454d DM |
2947 | SvPOK_on(sv_accept_buff); |
2948 | sv_2mortal(sv_accept_buff); | |
166ba7cd DM |
2949 | SAVETMPS; |
2950 | ST.accept_buff = | |
5b47454d DM |
2951 | (reg_trie_accepted*)SvPV_nolen(sv_accept_buff ); |
2952 | } | |
786e8c11 | 2953 | do { |
166ba7cd | 2954 | if (ST.accepted >= bufflen) { |
5b47454d | 2955 | bufflen *= 2; |
166ba7cd | 2956 | ST.accept_buff =(reg_trie_accepted*) |
5b47454d DM |
2957 | SvGROW(sv_accept_buff, |
2958 | bufflen * sizeof(reg_trie_accepted)); | |
2959 | } | |
2960 | SvCUR_set(sv_accept_buff,SvCUR(sv_accept_buff) | |
2961 | + sizeof(reg_trie_accepted)); | |
a3621e74 | 2962 | |
786e8c11 YO |
2963 | |
2964 | ST.accept_buff[ST.accepted].wordnum = got_wordnum; | |
2965 | ST.accept_buff[ST.accepted].endpos = uc; | |
2966 | ++ST.accepted; | |
2967 | } while (trie->nextword && (got_wordnum= trie->nextword[got_wordnum])); | |
2968 | } | |
2969 | #undef got_wordnum | |
a3621e74 | 2970 | |
07be1b83 | 2971 | DEBUG_TRIE_EXECUTE_r({ |
786e8c11 | 2972 | DUMP_EXEC_POS( (char *)uc, scan, do_utf8 ); |
a3621e74 | 2973 | PerlIO_printf( Perl_debug_log, |
786e8c11 | 2974 | "%*s %sState: %4"UVxf" Accepted: %4"UVxf" ", |
5bc10b2c | 2975 | 2+depth * 2, "", PL_colors[4], |
786e8c11 | 2976 | (UV)state, (UV)ST.accepted ); |
07be1b83 | 2977 | }); |
a3621e74 YO |
2978 | |
2979 | if ( base ) { | |
55eed653 NC |
2980 | REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, |
2981 | uscan, len, uvc, charid, foldlen, | |
2982 | foldbuf, uniflags); | |
a3621e74 | 2983 | |
5b47454d DM |
2984 | if (charid && |
2985 | (base + charid > trie->uniquecharcount ) | |
2986 | && (base + charid - 1 - trie->uniquecharcount | |
2987 | < trie->lasttrans) | |
2988 | && trie->trans[base + charid - 1 - | |
2989 | trie->uniquecharcount].check == state) | |
2990 | { | |
2991 | state = trie->trans[base + charid - 1 - | |
2992 | trie->uniquecharcount ].next; | |
2993 | } | |
2994 | else { | |
2995 | state = 0; | |
2996 | } | |
2997 | uc += len; | |
2998 | ||
2999 | } | |
3000 | else { | |
a3621e74 YO |
3001 | state = 0; |
3002 | } | |
3003 | DEBUG_TRIE_EXECUTE_r( | |
e4584336 | 3004 | PerlIO_printf( Perl_debug_log, |
786e8c11 | 3005 | "Charid:%3x CP:%4"UVxf" After State: %4"UVxf"%s\n", |
e4584336 | 3006 | charid, uvc, (UV)state, PL_colors[5] ); |
a3621e74 YO |
3007 | ); |
3008 | } | |
166ba7cd | 3009 | if (!ST.accepted ) |
a3621e74 | 3010 | sayNO; |
a3621e74 | 3011 | |
166ba7cd DM |
3012 | DEBUG_EXECUTE_r( |
3013 | PerlIO_printf( Perl_debug_log, | |
3014 | "%*s %sgot %"IVdf" possible matches%s\n", | |
5bc10b2c | 3015 | REPORT_CODE_OFF + depth * 2, "", |
166ba7cd DM |
3016 | PL_colors[4], (IV)ST.accepted, PL_colors[5] ); |
3017 | ); | |
786e8c11 | 3018 | }} |
fae667d5 YO |
3019 | goto trie_first_try; /* jump into the fail handler */ |
3020 | /* NOTREACHED */ | |
166ba7cd | 3021 | case TRIE_next_fail: /* we failed - try next alterative */ |
fae667d5 YO |
3022 | if ( ST.jump) { |
3023 | REGCP_UNWIND(ST.cp); | |
3024 | for (n = *PL_reglastparen; n > ST.lastparen; n--) | |
f0ab9afb | 3025 | PL_regoffs[n].end = -1; |
fae667d5 YO |
3026 | *PL_reglastparen = n; |
3027 | } | |
3028 | trie_first_try: | |
5d458dd8 YO |
3029 | if (do_cutgroup) { |
3030 | do_cutgroup = 0; | |
3031 | no_final = 0; | |
3032 | } | |
fae667d5 YO |
3033 | |
3034 | if ( ST.jump) { | |
3035 | ST.lastparen = *PL_reglastparen; | |
3036 | REGCP_SET(ST.cp); | |
3037 | } | |
166ba7cd DM |
3038 | if ( ST.accepted == 1 ) { |
3039 | /* only one choice left - just continue */ | |
3040 | DEBUG_EXECUTE_r({ | |
2b8b4781 NC |
3041 | AV *const trie_words |
3042 | = (AV *) rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]; | |
3043 | SV ** const tmp = av_fetch( trie_words, | |
5c9f2f80 | 3044 | ST.accept_buff[ 0 ].wordnum-1, 0 ); |
de734bd5 A |
3045 | SV *sv= tmp ? sv_newmortal() : NULL; |
3046 | ||
166ba7cd DM |
3047 | PerlIO_printf( Perl_debug_log, |
3048 | "%*s %sonly one match left: #%d <%s>%s\n", | |
5bc10b2c | 3049 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], |
166ba7cd | 3050 | ST.accept_buff[ 0 ].wordnum, |
de734bd5 A |
3051 | tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0, |
3052 | PL_colors[0], PL_colors[1], | |
3053 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | |
3054 | ) | |
3055 | : "not compiled under -Dr", | |
166ba7cd DM |
3056 | PL_colors[5] ); |
3057 | }); | |
3058 | PL_reginput = (char *)ST.accept_buff[ 0 ].endpos; | |
3059 | /* in this case we free tmps/leave before we call regmatch | |
3060 | as we wont be using accept_buff again. */ | |
5d458dd8 | 3061 | |
166ba7cd DM |
3062 | locinput = PL_reginput; |
3063 | nextchr = UCHARAT(locinput); | |
5d458dd8 YO |
3064 | if ( !ST.jump || !ST.jump[ST.accept_buff[0].wordnum]) |
3065 | scan = ST.B; | |
3066 | else | |
3067 | scan = ST.me + ST.jump[ST.accept_buff[0].wordnum]; | |
3068 | if (!has_cutgroup) { | |
3069 | FREETMPS; | |
3070 | LEAVE; | |
3071 | } else { | |
3072 | ST.accepted--; | |
3073 | PUSH_YES_STATE_GOTO(TRIE_next, scan); | |
3074 | } | |
786e8c11 | 3075 | |
166ba7cd DM |
3076 | continue; /* execute rest of RE */ |
3077 | } | |
fae667d5 YO |
3078 | |
3079 | if ( !ST.accepted-- ) { | |
5d458dd8 YO |
3080 | DEBUG_EXECUTE_r({ |
3081 | PerlIO_printf( Perl_debug_log, | |
3082 | "%*s %sTRIE failed...%s\n", | |
3083 | REPORT_CODE_OFF+depth*2, "", | |
3084 | PL_colors[4], | |
3085 | PL_colors[5] ); | |
3086 | }); | |
166ba7cd DM |
3087 | FREETMPS; |
3088 | LEAVE; | |
5d458dd8 | 3089 | sayNO_SILENT; |
fae667d5 YO |
3090 | /*NOTREACHED*/ |
3091 | } | |
166ba7cd | 3092 | |
a3621e74 | 3093 | /* |
166ba7cd DM |
3094 | There are at least two accepting states left. Presumably |
3095 | the number of accepting states is going to be low, | |
3096 | typically two. So we simply scan through to find the one | |
3097 | with lowest wordnum. Once we find it, we swap the last | |
3098 | state into its place and decrement the size. We then try to | |
3099 | match the rest of the pattern at the point where the word | |
3100 | ends. If we succeed, control just continues along the | |
3101 | regex; if we fail we return here to try the next accepting | |
3102 | state | |
3103 | */ | |
a3621e74 | 3104 | |
166ba7cd DM |
3105 | { |
3106 | U32 best = 0; | |
3107 | U32 cur; | |
3108 | for( cur = 1 ; cur <= ST.accepted ; cur++ ) { | |
3109 | DEBUG_TRIE_EXECUTE_r( | |
f2278c82 | 3110 | PerlIO_printf( Perl_debug_log, |
166ba7cd | 3111 | "%*s %sgot %"IVdf" (%d) as best, looking at %"IVdf" (%d)%s\n", |
5bc10b2c | 3112 | REPORT_CODE_OFF + depth * 2, "", PL_colors[4], |
166ba7cd DM |
3113 | (IV)best, ST.accept_buff[ best ].wordnum, (IV)cur, |
3114 | ST.accept_buff[ cur ].wordnum, PL_colors[5] ); | |
3115 | ); | |
3116 | ||
3117 | if (ST.accept_buff[cur].wordnum < | |
3118 | ST.accept_buff[best].wordnum) | |
3119 | best = cur; | |
a3621e74 | 3120 | } |
166ba7cd DM |
3121 | |
3122 | DEBUG_EXECUTE_r({ | |
2b8b4781 NC |
3123 | AV *const trie_words |
3124 | = (AV *) rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]; | |
3125 | SV ** const tmp = av_fetch( trie_words, | |
5c9f2f80 | 3126 | ST.accept_buff[ best ].wordnum - 1, 0 ); |
7f69552c | 3127 | regnode *nextop=(!ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) ? |
265c4333 | 3128 | ST.B : |
7f69552c | 3129 | ST.me + ST.jump[ST.accept_buff[best].wordnum]; |
de734bd5 A |
3130 | SV *sv= tmp ? sv_newmortal() : NULL; |
3131 | ||
265c4333 YO |
3132 | PerlIO_printf( Perl_debug_log, |
3133 | "%*s %strying alternation #%d <%s> at node #%d %s\n", | |
5bc10b2c | 3134 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], |
166ba7cd | 3135 | ST.accept_buff[best].wordnum, |
de734bd5 A |
3136 | tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0, |
3137 | PL_colors[0], PL_colors[1], | |
3138 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | |
3139 | ) : "not compiled under -Dr", | |
265c4333 | 3140 | REG_NODE_NUM(nextop), |
166ba7cd DM |
3141 | PL_colors[5] ); |
3142 | }); | |
3143 | ||
3144 | if ( best<ST.accepted ) { | |
3145 | reg_trie_accepted tmp = ST.accept_buff[ best ]; | |
3146 | ST.accept_buff[ best ] = ST.accept_buff[ ST.accepted ]; | |
3147 | ST.accept_buff[ ST.accepted ] = tmp; | |
3148 | best = ST.accepted; | |
a3621e74 | 3149 | } |
166ba7cd | 3150 | PL_reginput = (char *)ST.accept_buff[ best ].endpos; |
7f69552c | 3151 | if ( !ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) { |
5d458dd8 | 3152 | scan = ST.B; |
786e8c11 YO |
3153 | /* NOTREACHED */ |
3154 | } else { | |
5d458dd8 | 3155 | scan = ST.me + ST.jump[ST.accept_buff[best].wordnum]; |
786e8c11 YO |
3156 | /* NOTREACHED */ |
3157 | } | |
5d458dd8 YO |
3158 | if (has_cutgroup) { |
3159 | PUSH_YES_STATE_GOTO(TRIE_next, scan); | |
3160 | /* NOTREACHED */ | |
3161 | } else { | |
3162 | PUSH_STATE_GOTO(TRIE_next, scan); | |
3163 | /* NOTREACHED */ | |
3164 | } | |
786e8c11 | 3165 | /* NOTREACHED */ |
166ba7cd | 3166 | } |
166ba7cd | 3167 | /* NOTREACHED */ |
5d458dd8 YO |
3168 | case TRIE_next: |
3169 | FREETMPS; | |
3170 | LEAVE; | |
3171 | sayYES; | |
166ba7cd DM |
3172 | #undef ST |
3173 | ||
95b24440 DM |
3174 | case EXACT: { |
3175 | char *s = STRING(scan); | |
24d3c4a9 | 3176 | ln = STR_LEN(scan); |
eb160463 | 3177 | if (do_utf8 != UTF) { |
bc517b45 | 3178 | /* The target and the pattern have differing utf8ness. */ |
1aa99e6b | 3179 | char *l = locinput; |
24d3c4a9 | 3180 | const char * const e = s + ln; |
a72c7584 | 3181 | |
5ff6fc6d JH |
3182 | if (do_utf8) { |
3183 | /* The target is utf8, the pattern is not utf8. */ | |
1aa99e6b | 3184 | while (s < e) { |
a3b680e6 | 3185 | STRLEN ulen; |
1aa99e6b | 3186 | if (l >= PL_regeol) |
5ff6fc6d JH |
3187 | sayNO; |
3188 | if (NATIVE_TO_UNI(*(U8*)s) != | |
89ebb4a3 | 3189 | utf8n_to_uvuni((U8*)l, UTF8_MAXBYTES, &ulen, |
041457d9 | 3190 | uniflags)) |
5ff6fc6d | 3191 | sayNO; |
bc517b45 | 3192 | l += ulen; |
5ff6fc6d | 3193 | s ++; |
1aa99e6b | 3194 | } |
5ff6fc6d JH |
3195 | } |
3196 | else { | |
3197 | /* The target is not utf8, the pattern is utf8. */ | |
1aa99e6b | 3198 | while (s < e) { |
a3b680e6 | 3199 | STRLEN ulen; |
1aa99e6b IH |
3200 | if (l >= PL_regeol) |
3201 | sayNO; | |
5ff6fc6d | 3202 | if (NATIVE_TO_UNI(*((U8*)l)) != |
89ebb4a3 | 3203 | utf8n_to_uvuni((U8*)s, UTF8_MAXBYTES, &ulen, |
041457d9 | 3204 | uniflags)) |
1aa99e6b | 3205 | sayNO; |
bc517b45 | 3206 | s += ulen; |
a72c7584 | 3207 | l ++; |
1aa99e6b | 3208 | } |
5ff6fc6d | 3209 | } |
1aa99e6b IH |
3210 | locinput = l; |
3211 | nextchr = UCHARAT(locinput); | |
3212 | break; | |
3213 | } | |
bc517b45 | 3214 | /* The target and the pattern have the same utf8ness. */ |
d6a28714 JH |
3215 | /* Inline the first character, for speed. */ |
3216 | if (UCHARAT(s) != nextchr) | |
3217 | sayNO; | |
24d3c4a9 | 3218 | if (PL_regeol - locinput < ln) |
d6a28714 | 3219 | sayNO; |
24d3c4a9 | 3220 | if (ln > 1 && memNE(s, locinput, ln)) |
d6a28714 | 3221 | sayNO; |
24d3c4a9 | 3222 | locinput += ln; |
d6a28714 JH |
3223 | nextchr = UCHARAT(locinput); |
3224 | break; | |
95b24440 | 3225 | } |
d6a28714 | 3226 | case EXACTFL: |
b8c5462f JH |
3227 | PL_reg_flags |= RF_tainted; |
3228 | /* FALL THROUGH */ | |
95b24440 | 3229 | case EXACTF: { |
be8e71aa | 3230 | char * const s = STRING(scan); |
24d3c4a9 | 3231 | ln = STR_LEN(scan); |
d6a28714 | 3232 | |
d07ddd77 JH |
3233 | if (do_utf8 || UTF) { |
3234 | /* Either target or the pattern are utf8. */ | |
be8e71aa | 3235 | const char * const l = locinput; |
d07ddd77 | 3236 | char *e = PL_regeol; |
bc517b45 | 3237 | |
24d3c4a9 | 3238 | if (ibcmp_utf8(s, 0, ln, (bool)UTF, |
1feea2c7 | 3239 | l, &e, 0, do_utf8)) { |
5486206c JH |
3240 | /* One more case for the sharp s: |
3241 | * pack("U0U*", 0xDF) =~ /ss/i, | |
3242 | * the 0xC3 0x9F are the UTF-8 | |
3243 | * byte sequence for the U+00DF. */ | |
e1d1eefb | 3244 | |
5486206c | 3245 | if (!(do_utf8 && |
e1d1eefb | 3246 | toLOWER(s[0]) == 's' && |
24d3c4a9 | 3247 | ln >= 2 && |
5486206c JH |
3248 | toLOWER(s[1]) == 's' && |
3249 | (U8)l[0] == 0xC3 && | |
3250 | e - l >= 2 && | |
3251 | (U8)l[1] == 0x9F)) | |
3252 | sayNO; | |
3253 | } | |
d07ddd77 JH |
3254 | locinput = e; |
3255 | nextchr = UCHARAT(locinput); | |
3256 | break; | |
a0ed51b3 | 3257 | } |
d6a28714 | 3258 | |
bc517b45 JH |
3259 | /* Neither the target and the pattern are utf8. */ |
3260 | ||
d6a28714 JH |
3261 | /* Inline the first character, for speed. */ |
3262 | if (UCHARAT(s) != nextchr && | |
3263 | UCHARAT(s) != ((OP(scan) == EXACTF) | |
3264 | ? PL_fold : PL_fold_locale)[nextchr]) | |
a0ed51b3 | 3265 | sayNO; |
24d3c4a9 | 3266 | if (PL_regeol - locinput < ln) |
b8c5462f | 3267 | sayNO; |
24d3c4a9 DM |
3268 | if (ln > 1 && (OP(scan) == EXACTF |
3269 | ? ibcmp(s, locinput, ln) | |
3270 | : ibcmp_locale(s, locinput, ln))) | |
4633a7c4 | 3271 | sayNO; |
24d3c4a9 | 3272 | locinput += ln; |
d6a28714 | 3273 | nextchr = UCHARAT(locinput); |
a0d0e21e | 3274 | break; |
95b24440 | 3275 | } |
d6a28714 | 3276 | case ANYOF: |
ffc61ed2 | 3277 | if (do_utf8) { |
9e55ce06 JH |
3278 | STRLEN inclasslen = PL_regeol - locinput; |
3279 | ||
32fc9b6a | 3280 | if (!reginclass(rex, scan, (U8*)locinput, &inclasslen, do_utf8)) |
262b90c4 | 3281 | goto anyof_fail; |
ffc61ed2 JH |
3282 | if (locinput >= PL_regeol) |
3283 | sayNO; | |
0f0076b4 | 3284 | locinput += inclasslen ? inclasslen : UTF8SKIP(locinput); |
b8c5462f | 3285 | nextchr = UCHARAT(locinput); |
e0f9d4a8 | 3286 | break; |
ffc61ed2 JH |
3287 | } |
3288 | else { | |
3289 | if (nextchr < 0) | |
3290 | nextchr = UCHARAT(locinput); | |
32fc9b6a | 3291 | if (!REGINCLASS(rex, scan, (U8*)locinput)) |
262b90c4 | 3292 | goto anyof_fail; |
ffc61ed2 JH |
3293 | if (!nextchr && locinput >= PL_regeol) |
3294 | sayNO; | |
3295 | nextchr = UCHARAT(++locinput); | |
e0f9d4a8 JH |
3296 | break; |
3297 | } | |
262b90c4 | 3298 | anyof_fail: |
e0f9d4a8 JH |
3299 | /* If we might have the case of the German sharp s |
3300 | * in a casefolding Unicode character class. */ | |
3301 | ||
ebc501f0 JH |
3302 | if (ANYOF_FOLD_SHARP_S(scan, locinput, PL_regeol)) { |
3303 | locinput += SHARP_S_SKIP; | |
e0f9d4a8 | 3304 | nextchr = UCHARAT(locinput); |
ffc61ed2 | 3305 | } |
e0f9d4a8 JH |
3306 | else |
3307 | sayNO; | |
b8c5462f | 3308 | break; |
d6a28714 | 3309 | case ALNUML: |
b8c5462f JH |
3310 | PL_reg_flags |= RF_tainted; |
3311 | /* FALL THROUGH */ | |
d6a28714 | 3312 | case ALNUM: |
b8c5462f | 3313 | if (!nextchr) |
4633a7c4 | 3314 | sayNO; |
ffc61ed2 | 3315 | if (do_utf8) { |
1a4fad37 | 3316 | LOAD_UTF8_CHARCLASS_ALNUM(); |
ffc61ed2 | 3317 | if (!(OP(scan) == ALNUM |
bb7a0f54 | 3318 | ? (bool)swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8) |
d6a28714 | 3319 | : isALNUM_LC_utf8((U8*)locinput))) |
b8c5462f JH |
3320 | { |
3321 | sayNO; | |
a0ed51b3 | 3322 | } |
b8c5462f | 3323 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
3324 | nextchr = UCHARAT(locinput); |
3325 | break; | |
3326 | } | |
ffc61ed2 | 3327 | if (!(OP(scan) == ALNUM |
d6a28714 | 3328 | ? isALNUM(nextchr) : isALNUM_LC(nextchr))) |
bbce6d69 | 3329 | sayNO; |
b8c5462f | 3330 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 3331 | break; |
d6a28714 | 3332 | case NALNUML: |
b8c5462f JH |
3333 | PL_reg_flags |= RF_tainted; |
3334 | /* FALL THROUGH */ | |
d6a28714 JH |
3335 | case NALNUM: |
3336 | if (!nextchr && locinput >= PL_regeol) | |
a0ed51b3 | 3337 | sayNO; |
ffc61ed2 | 3338 | if (do_utf8) { |
1a4fad37 | 3339 | LOAD_UTF8_CHARCLASS_ALNUM(); |
ffc61ed2 | 3340 | if (OP(scan) == NALNUM |
bb7a0f54 | 3341 | ? (bool)swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8) |
d6a28714 JH |
3342 | : isALNUM_LC_utf8((U8*)locinput)) |
3343 | { | |
b8c5462f | 3344 | sayNO; |
d6a28714 | 3345 | } |
b8c5462f JH |
3346 | locinput += PL_utf8skip[nextchr]; |
3347 | nextchr = UCHARAT(locinput); | |
3348 | break; | |
3349 | } | |
ffc61ed2 | 3350 | if (OP(scan) == NALNUM |
d6a28714 | 3351 | ? isALNUM(nextchr) : isALNUM_LC(nextchr)) |
b8c5462f | 3352 | sayNO; |
76e3520e | 3353 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 3354 | break; |
d6a28714 JH |
3355 | case BOUNDL: |
3356 | case NBOUNDL: | |
3280af22 | 3357 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 3358 | /* FALL THROUGH */ |
d6a28714 JH |
3359 | case BOUND: |
3360 | case NBOUND: | |
3361 | /* was last char in word? */ | |
ffc61ed2 | 3362 | if (do_utf8) { |
12d33761 | 3363 | if (locinput == PL_bostr) |
24d3c4a9 | 3364 | ln = '\n'; |
ffc61ed2 | 3365 | else { |
a3b680e6 | 3366 | const U8 * const r = reghop3((U8*)locinput, -1, (U8*)PL_bostr); |
9041c2e3 | 3367 | |
24d3c4a9 | 3368 | ln = utf8n_to_uvchr(r, UTF8SKIP(r), 0, uniflags); |
ffc61ed2 JH |
3369 | } |
3370 | if (OP(scan) == BOUND || OP(scan) == NBOUND) { | |
24d3c4a9 | 3371 | ln = isALNUM_uni(ln); |
1a4fad37 | 3372 | LOAD_UTF8_CHARCLASS_ALNUM(); |
3568d838 | 3373 | n = swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8); |
ffc61ed2 JH |
3374 | } |
3375 | else { | |
24d3c4a9 | 3376 | ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln)); |
ffc61ed2 JH |
3377 | n = isALNUM_LC_utf8((U8*)locinput); |
3378 | } | |
a0ed51b3 | 3379 | } |
d6a28714 | 3380 | else { |
24d3c4a9 | 3381 | ln = (locinput != PL_bostr) ? |
12d33761 | 3382 | UCHARAT(locinput - 1) : '\n'; |
ffc61ed2 | 3383 | if (OP(scan) == BOUND || OP(scan) == NBOUND) { |
24d3c4a9 | 3384 | ln = isALNUM(ln); |
ffc61ed2 JH |
3385 | n = isALNUM(nextchr); |
3386 | } | |
3387 | else { | |
24d3c4a9 | 3388 | ln = isALNUM_LC(ln); |
ffc61ed2 JH |
3389 | n = isALNUM_LC(nextchr); |
3390 | } | |
d6a28714 | 3391 | } |
24d3c4a9 | 3392 | if (((!ln) == (!n)) == (OP(scan) == BOUND || |
ffc61ed2 JH |
3393 | OP(scan) == BOUNDL)) |
3394 | sayNO; | |
a0ed51b3 | 3395 | break; |
d6a28714 | 3396 | case SPACEL: |
3280af22 | 3397 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 3398 | /* FALL THROUGH */ |
d6a28714 | 3399 | case SPACE: |
9442cb0e | 3400 | if (!nextchr) |
4633a7c4 | 3401 | sayNO; |
1aa99e6b | 3402 | if (do_utf8) { |
fd400ab9 | 3403 | if (UTF8_IS_CONTINUED(nextchr)) { |
1a4fad37 | 3404 | LOAD_UTF8_CHARCLASS_SPACE(); |
ffc61ed2 | 3405 | if (!(OP(scan) == SPACE |
bb7a0f54 | 3406 | ? (bool)swash_fetch(PL_utf8_space, (U8*)locinput, do_utf8) |
ffc61ed2 JH |
3407 | : isSPACE_LC_utf8((U8*)locinput))) |
3408 | { | |
3409 | sayNO; | |
3410 | } | |
3411 | locinput += PL_utf8skip[nextchr]; | |
3412 | nextchr = UCHARAT(locinput); | |
3413 | break; | |
d6a28714 | 3414 | } |
ffc61ed2 JH |
3415 | if (!(OP(scan) == SPACE |
3416 | ? isSPACE(nextchr) : isSPACE_LC(nextchr))) | |
3417 | sayNO; | |
3418 | nextchr = UCHARAT(++locinput); | |
3419 | } | |
3420 | else { | |
3421 | if (!(OP(scan) == SPACE | |
3422 | ? isSPACE(nextchr) : isSPACE_LC(nextchr))) | |
3423 | sayNO; | |
3424 | nextchr = UCHARAT(++locinput); | |
a0ed51b3 | 3425 | } |
a0ed51b3 | 3426 | break; |
d6a28714 | 3427 | case NSPACEL: |
3280af22 | 3428 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 3429 | /* FALL THROUGH */ |
d6a28714 | 3430 | case NSPACE: |
9442cb0e | 3431 | if (!nextchr && locinput >= PL_regeol) |
b8c5462f | 3432 | sayNO; |
1aa99e6b | 3433 | if (do_utf8) { |
1a4fad37 | 3434 | LOAD_UTF8_CHARCLASS_SPACE(); |
ffc61ed2 | 3435 | if (OP(scan) == NSPACE |
bb7a0f54 | 3436 | ? (bool)swash_fetch(PL_utf8_space, (U8*)locinput, do_utf8) |
d6a28714 | 3437 | : isSPACE_LC_utf8((U8*)locinput)) |
b8c5462f JH |
3438 | { |
3439 | sayNO; | |
3440 | } | |
3441 | locinput += PL_utf8skip[nextchr]; | |
3442 | nextchr = UCHARAT(locinput); | |
3443 | break; | |
a0ed51b3 | 3444 | } |
ffc61ed2 | 3445 | if (OP(scan) == NSPACE |
d6a28714 | 3446 | ? isSPACE(nextchr) : isSPACE_LC(nextchr)) |
4633a7c4 | 3447 | sayNO; |
76e3520e | 3448 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 3449 | break; |
d6a28714 | 3450 | case DIGITL: |
a0ed51b3 LW |
3451 | PL_reg_flags |= RF_tainted; |
3452 | /* FALL THROUGH */ | |
d6a28714 | 3453 | case DIGIT: |
9442cb0e | 3454 | if (!nextchr) |
a0ed51b3 | 3455 | sayNO; |
1aa99e6b | 3456 | if (do_utf8) { |
1a4fad37 | 3457 | LOAD_UTF8_CHARCLASS_DIGIT(); |
ffc61ed2 | 3458 | if (!(OP(scan) == DIGIT |
bb7a0f54 | 3459 | ? (bool)swash_fetch(PL_utf8_digit, (U8*)locinput, do_utf8) |
9442cb0e | 3460 | : isDIGIT_LC_utf8((U8*)locinput))) |
dfe13c55 | 3461 | { |
a0ed51b3 | 3462 | sayNO; |
dfe13c55 | 3463 | } |
6f06b55f | 3464 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
3465 | nextchr = UCHARAT(locinput); |
3466 | break; | |
3467 | } | |
ffc61ed2 | 3468 | if (!(OP(scan) == DIGIT |
9442cb0e | 3469 | ? isDIGIT(nextchr) : isDIGIT_LC(nextchr))) |
a0ed51b3 LW |
3470 | sayNO; |
3471 | nextchr = UCHARAT(++locinput); | |
3472 | break; | |
d6a28714 | 3473 | case NDIGITL: |
b8c5462f JH |
3474 | PL_reg_flags |= RF_tainted; |
3475 | /* FALL THROUGH */ | |
d6a28714 | 3476 | case NDIGIT: |
9442cb0e | 3477 | if (!nextchr && locinput >= PL_regeol) |
b8c5462f | 3478 | sayNO; |
1aa99e6b | 3479 | if (do_utf8) { |
1a4fad37 | 3480 | LOAD_UTF8_CHARCLASS_DIGIT(); |
ffc61ed2 | 3481 | if (OP(scan) == NDIGIT |
bb7a0f54 | 3482 | ? (bool)swash_fetch(PL_utf8_digit, (U8*)locinput, do_utf8) |
9442cb0e GS |
3483 | : isDIGIT_LC_utf8((U8*)locinput)) |
3484 | { | |
a0ed51b3 | 3485 | sayNO; |
9442cb0e | 3486 | } |
6f06b55f | 3487 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
3488 | nextchr = UCHARAT(locinput); |
3489 | break; | |
3490 | } | |
ffc61ed2 | 3491 | if (OP(scan) == NDIGIT |
9442cb0e | 3492 | ? isDIGIT(nextchr) : isDIGIT_LC(nextchr)) |
a0ed51b3 LW |
3493 | sayNO; |
3494 | nextchr = UCHARAT(++locinput); | |
3495 | break; | |
3496 | case CLUMP: | |
b7c83a7e | 3497 | if (locinput >= PL_regeol) |
a0ed51b3 | 3498 | sayNO; |
b7c83a7e | 3499 | if (do_utf8) { |
1a4fad37 | 3500 | LOAD_UTF8_CHARCLASS_MARK(); |
b7c83a7e JH |
3501 | if (swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8)) |
3502 | sayNO; | |
3503 | locinput += PL_utf8skip[nextchr]; | |
3504 | while (locinput < PL_regeol && | |
3505 | swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8)) | |
3506 | locinput += UTF8SKIP(locinput); | |
3507 | if (locinput > PL_regeol) | |
3508 | sayNO; | |
eb08e2da JH |
3509 | } |
3510 | else | |
3511 | locinput++; | |
a0ed51b3 LW |
3512 | nextchr = UCHARAT(locinput); |
3513 | break; | |
81714fb9 YO |
3514 | |
3515 | case NREFFL: | |
3516 | { | |
3517 | char *s; | |
ff1157ca | 3518 | char type; |
81714fb9 YO |
3519 | PL_reg_flags |= RF_tainted; |
3520 | /* FALL THROUGH */ | |
3521 | case NREF: | |
3522 | case NREFF: | |
ff1157ca | 3523 | type = OP(scan); |
0a4db386 YO |
3524 | n = reg_check_named_buff_matched(rex,scan); |
3525 | ||
3526 | if ( n ) { | |
3527 | type = REF + ( type - NREF ); | |
3528 | goto do_ref; | |
3529 | } else { | |
81714fb9 | 3530 | sayNO; |
0a4db386 YO |
3531 | } |
3532 | /* unreached */ | |
c8756f30 | 3533 | case REFFL: |
3280af22 | 3534 | PL_reg_flags |= RF_tainted; |
c8756f30 | 3535 | /* FALL THROUGH */ |
c277df42 | 3536 | case REF: |
81714fb9 | 3537 | case REFF: |
c277df42 | 3538 | n = ARG(scan); /* which paren pair */ |
81714fb9 YO |
3539 | type = OP(scan); |
3540 | do_ref: | |
f0ab9afb | 3541 | ln = PL_regoffs[n].start; |
2c2d71f5 | 3542 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
3b6647e0 | 3543 | if (*PL_reglastparen < n || ln == -1) |
af3f8c16 | 3544 | sayNO; /* Do not match unless seen CLOSEn. */ |
f0ab9afb | 3545 | if (ln == PL_regoffs[n].end) |
a0d0e21e | 3546 | break; |
a0ed51b3 | 3547 | |
24d3c4a9 | 3548 | s = PL_bostr + ln; |
81714fb9 | 3549 | if (do_utf8 && type != REF) { /* REF can do byte comparison */ |
a0ed51b3 | 3550 | char *l = locinput; |
f0ab9afb | 3551 | const char *e = PL_bostr + PL_regoffs[n].end; |
a0ed51b3 LW |
3552 | /* |
3553 | * Note that we can't do the "other character" lookup trick as | |
3554 | * in the 8-bit case (no pun intended) because in Unicode we | |
3555 | * have to map both upper and title case to lower case. | |
3556 | */ | |
81714fb9 | 3557 | if (type == REFF) { |
a0ed51b3 | 3558 | while (s < e) { |
a3b680e6 AL |
3559 | STRLEN ulen1, ulen2; |
3560 | U8 tmpbuf1[UTF8_MAXBYTES_CASE+1]; | |
3561 | U8 tmpbuf2[UTF8_MAXBYTES_CASE+1]; | |
3562 | ||
a0ed51b3 LW |
3563 | if (l >= PL_regeol) |
3564 | sayNO; | |
a2a2844f JH |
3565 | toLOWER_utf8((U8*)s, tmpbuf1, &ulen1); |
3566 | toLOWER_utf8((U8*)l, tmpbuf2, &ulen2); | |
7114a2d2 | 3567 | if (ulen1 != ulen2 || memNE((char *)tmpbuf1, (char *)tmpbuf2, ulen1)) |
a0ed51b3 | 3568 | sayNO; |
a2a2844f JH |
3569 | s += ulen1; |
3570 | l += ulen2; | |
a0ed51b3 LW |
3571 | } |
3572 | } | |
3573 | locinput = l; | |
3574 | nextchr = UCHARAT(locinput); | |
3575 | break; | |
3576 | } | |
3577 | ||
a0d0e21e | 3578 | /* Inline the first character, for speed. */ |
76e3520e | 3579 | if (UCHARAT(s) != nextchr && |
81714fb9 YO |
3580 | (type == REF || |
3581 | (UCHARAT(s) != (type == REFF | |
3582 | ? PL_fold : PL_fold_locale)[nextchr]))) | |
4633a7c4 | 3583 | sayNO; |
f0ab9afb | 3584 | ln = PL_regoffs[n].end - ln; |
24d3c4a9 | 3585 | if (locinput + ln > PL_regeol) |
4633a7c4 | 3586 | sayNO; |
81714fb9 | 3587 | if (ln > 1 && (type == REF |
24d3c4a9 | 3588 | ? memNE(s, locinput, ln) |
81714fb9 | 3589 | : (type == REFF |
24d3c4a9 DM |
3590 | ? ibcmp(s, locinput, ln) |
3591 | : ibcmp_locale(s, locinput, ln)))) | |
4633a7c4 | 3592 | sayNO; |
24d3c4a9 | 3593 | locinput += ln; |
76e3520e | 3594 | nextchr = UCHARAT(locinput); |
a0d0e21e | 3595 | break; |
81714fb9 | 3596 | } |
a0d0e21e | 3597 | case NOTHING: |
c277df42 | 3598 | case TAIL: |
a0d0e21e LW |
3599 | break; |
3600 | case BACK: | |
3601 | break; | |
40a82448 DM |
3602 | |
3603 | #undef ST | |
3604 | #define ST st->u.eval | |
c277df42 | 3605 | { |
c277df42 | 3606 | SV *ret; |
6bda09f9 | 3607 | regexp *re; |
f8fc2ecf | 3608 | regexp_internal *rei; |
1a147d38 YO |
3609 | regnode *startpoint; |
3610 | ||
3611 | case GOSTART: | |
e7707071 YO |
3612 | case GOSUB: /* /(...(?1))/ /(...(?&foo))/ */ |
3613 | if (cur_eval && cur_eval->locinput==locinput) { | |
24b23f37 | 3614 | if (cur_eval->u.eval.close_paren == (U32)ARG(scan)) |
1a147d38 | 3615 | Perl_croak(aTHX_ "Infinite recursion in regex"); |
4b196cd4 | 3616 | if ( ++nochange_depth > max_nochange_depth ) |
1a147d38 YO |
3617 | Perl_croak(aTHX_ |
3618 | "Pattern subroutine nesting without pos change" | |
3619 | " exceeded limit in regex"); | |
6bda09f9 YO |
3620 | } else { |
3621 | nochange_depth = 0; | |
1a147d38 | 3622 | } |
6bda09f9 | 3623 | re = rex; |
f8fc2ecf | 3624 | rei = rexi; |
6bda09f9 | 3625 | (void)ReREFCNT_inc(rex); |
1a147d38 | 3626 | if (OP(scan)==GOSUB) { |
6bda09f9 YO |
3627 | startpoint = scan + ARG2L(scan); |
3628 | ST.close_paren = ARG(scan); | |
3629 | } else { | |
f8fc2ecf | 3630 | startpoint = rei->program+1; |
6bda09f9 YO |
3631 | ST.close_paren = 0; |
3632 | } | |
3633 | goto eval_recurse_doit; | |
3634 | /* NOTREACHED */ | |
3635 | case EVAL: /* /(?{A})B/ /(??{A})B/ and /(?(?{A})X|Y)B/ */ | |
3636 | if (cur_eval && cur_eval->locinput==locinput) { | |
4b196cd4 | 3637 | if ( ++nochange_depth > max_nochange_depth ) |
1a147d38 | 3638 | Perl_croak(aTHX_ "EVAL without pos change exceeded limit in regex"); |
6bda09f9 YO |
3639 | } else { |
3640 | nochange_depth = 0; | |
3641 | } | |
8e5e9ebe | 3642 | { |
4aabdb9b DM |
3643 | /* execute the code in the {...} */ |
3644 | dSP; | |
6136c704 | 3645 | SV ** const before = SP; |
4aabdb9b DM |
3646 | OP_4tree * const oop = PL_op; |
3647 | COP * const ocurcop = PL_curcop; | |
3648 | PAD *old_comppad; | |
4aabdb9b DM |
3649 | |
3650 | n = ARG(scan); | |
f8fc2ecf | 3651 | PL_op = (OP_4tree*)rexi->data->data[n]; |
24b23f37 YO |
3652 | DEBUG_STATE_r( PerlIO_printf(Perl_debug_log, |
3653 | " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) ); | |
f8fc2ecf | 3654 | PAD_SAVE_LOCAL(old_comppad, (PAD*)rexi->data->data[n + 2]); |
f0ab9afb | 3655 | PL_regoffs[0].end = PL_reg_magic->mg_len = locinput - PL_bostr; |
4aabdb9b | 3656 | |
2bf803e2 YO |
3657 | if (sv_yes_mark) { |
3658 | SV *sv_mrk = get_sv("REGMARK", 1); | |
3659 | sv_setsv(sv_mrk, sv_yes_mark); | |
3660 | } | |
3661 | ||
8e5e9ebe RGS |
3662 | CALLRUNOPS(aTHX); /* Scalar context. */ |
3663 | SPAGAIN; | |
3664 | if (SP == before) | |
075aa684 | 3665 | ret = &PL_sv_undef; /* protect against empty (?{}) blocks. */ |
8e5e9ebe RGS |
3666 | else { |
3667 | ret = POPs; | |
3668 | PUTBACK; | |
3669 | } | |
4aabdb9b DM |
3670 | |
3671 | PL_op = oop; | |
3672 | PAD_RESTORE_LOCAL(old_comppad); | |
3673 | PL_curcop = ocurcop; | |
24d3c4a9 | 3674 | if (!logical) { |
4aabdb9b DM |
3675 | /* /(?{...})/ */ |
3676 | sv_setsv(save_scalar(PL_replgv), ret); | |
4aabdb9b DM |
3677 | break; |
3678 | } | |
8e5e9ebe | 3679 | } |
24d3c4a9 DM |
3680 | if (logical == 2) { /* Postponed subexpression: /(??{...})/ */ |
3681 | logical = 0; | |
4aabdb9b | 3682 | { |
4f639d21 DM |
3683 | /* extract RE object from returned value; compiling if |
3684 | * necessary */ | |
3685 | ||
6136c704 | 3686 | MAGIC *mg = NULL; |
be8e71aa | 3687 | const SV *sv; |
faf82a0b AE |
3688 | if(SvROK(ret) && SvSMAGICAL(sv = SvRV(ret))) |
3689 | mg = mg_find(sv, PERL_MAGIC_qr); | |
3690 | else if (SvSMAGICAL(ret)) { | |
3691 | if (SvGMAGICAL(ret)) | |
3692 | sv_unmagic(ret, PERL_MAGIC_qr); | |
3693 | else | |
3694 | mg = mg_find(ret, PERL_MAGIC_qr); | |
0f5d15d6 | 3695 | } |
faf82a0b | 3696 | |
0f5d15d6 | 3697 | if (mg) { |
28d8d7f4 | 3698 | re = reg_temp_copy((regexp *)mg->mg_obj); /*XXX:dmq*/ |
0f5d15d6 IZ |
3699 | } |
3700 | else { | |
c737faaf | 3701 | U32 pm_flags = 0; |
a3b680e6 | 3702 | const I32 osize = PL_regsize; |
0f5d15d6 | 3703 | |
c737faaf | 3704 | if (DO_UTF8(ret)) pm_flags |= RXf_UTF8; |
3ab4a224 | 3705 | re = CALLREGCOMP(ret, pm_flags); |
9041c2e3 | 3706 | if (!(SvFLAGS(ret) |
faf82a0b AE |
3707 | & (SVs_TEMP | SVs_PADTMP | SVf_READONLY |
3708 | | SVs_GMG))) | |
14befaf4 DM |
3709 | sv_magic(ret,(SV*)ReREFCNT_inc(re), |
3710 | PERL_MAGIC_qr,0,0); | |
0f5d15d6 | 3711 | PL_regsize = osize; |
0f5d15d6 | 3712 | } |
4aabdb9b | 3713 | } |
28d8d7f4 YO |
3714 | RX_MATCH_COPIED_off(re); |
3715 | re->subbeg = rex->subbeg; | |
3716 | re->sublen = rex->sublen; | |
f8fc2ecf | 3717 | rei = RXi_GET(re); |
6bda09f9 YO |
3718 | DEBUG_EXECUTE_r( |
3719 | debug_start_match(re, do_utf8, locinput, PL_regeol, | |
3720 | "Matching embedded"); | |
3721 | ); | |
f8fc2ecf | 3722 | startpoint = rei->program + 1; |
1a147d38 | 3723 | ST.close_paren = 0; /* only used for GOSUB */ |
6bda09f9 YO |
3724 | /* borrowed from regtry */ |
3725 | if (PL_reg_start_tmpl <= re->nparens) { | |
3726 | PL_reg_start_tmpl = re->nparens*3/2 + 3; | |
3727 | if(PL_reg_start_tmp) | |
3728 | Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*); | |
3729 | else | |
3730 | Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*); | |
dd5def09 | 3731 | } |
aa283a38 | 3732 | |
1a147d38 | 3733 | eval_recurse_doit: /* Share code with GOSUB below this line */ |
aa283a38 | 3734 | /* run the pattern returned from (??{...}) */ |
40a82448 DM |
3735 | ST.cp = regcppush(0); /* Save *all* the positions. */ |
3736 | REGCP_SET(ST.lastcp); | |
6bda09f9 | 3737 | |
f0ab9afb | 3738 | PL_regoffs = re->offs; /* essentially NOOP on GOSUB */ |
6bda09f9 | 3739 | |
4aabdb9b DM |
3740 | *PL_reglastparen = 0; |
3741 | *PL_reglastcloseparen = 0; | |
4aabdb9b | 3742 | PL_reginput = locinput; |
ae0beba1 | 3743 | PL_regsize = 0; |
4aabdb9b DM |
3744 | |
3745 | /* XXXX This is too dramatic a measure... */ | |
3746 | PL_reg_maxiter = 0; | |
3747 | ||
faec1544 | 3748 | ST.toggle_reg_flags = PL_reg_flags; |
bbe252da | 3749 | if (re->extflags & RXf_UTF8) |
faec1544 DM |
3750 | PL_reg_flags |= RF_utf8; |
3751 | else | |
3752 | PL_reg_flags &= ~RF_utf8; | |
3753 | ST.toggle_reg_flags ^= PL_reg_flags; /* diff of old and new */ | |
3754 | ||
40a82448 | 3755 | ST.prev_rex = rex; |
faec1544 | 3756 | ST.prev_curlyx = cur_curlyx; |
28d8d7f4 | 3757 | SETREX(rex,re); |
f8fc2ecf | 3758 | rexi = rei; |
faec1544 | 3759 | cur_curlyx = NULL; |
40a82448 | 3760 | ST.B = next; |
faec1544 DM |
3761 | ST.prev_eval = cur_eval; |
3762 | cur_eval = st; | |
faec1544 | 3763 | /* now continue from first node in postoned RE */ |
6bda09f9 | 3764 | PUSH_YES_STATE_GOTO(EVAL_AB, startpoint); |
4aabdb9b | 3765 | /* NOTREACHED */ |
a0ed51b3 | 3766 | } |
24d3c4a9 DM |
3767 | /* logical is 1, /(?(?{...})X|Y)/ */ |
3768 | sw = (bool)SvTRUE(ret); | |
3769 | logical = 0; | |
c277df42 IZ |
3770 | break; |
3771 | } | |
40a82448 | 3772 | |
faec1544 DM |
3773 | case EVAL_AB: /* cleanup after a successful (??{A})B */ |
3774 | /* note: this is called twice; first after popping B, then A */ | |
3775 | PL_reg_flags ^= ST.toggle_reg_flags; | |
40a82448 | 3776 | ReREFCNT_dec(rex); |
28d8d7f4 | 3777 | SETREX(rex,ST.prev_rex); |
f8fc2ecf | 3778 | rexi = RXi_GET(rex); |
faec1544 DM |
3779 | regcpblow(ST.cp); |
3780 | cur_eval = ST.prev_eval; | |
3781 | cur_curlyx = ST.prev_curlyx; | |
40a82448 DM |
3782 | /* XXXX This is too dramatic a measure... */ |
3783 | PL_reg_maxiter = 0; | |
e7707071 | 3784 | if ( nochange_depth ) |
4b196cd4 | 3785 | nochange_depth--; |
262b90c4 | 3786 | sayYES; |
40a82448 | 3787 | |
40a82448 | 3788 | |
faec1544 DM |
3789 | case EVAL_AB_fail: /* unsuccessfully ran A or B in (??{A})B */ |
3790 | /* note: this is called twice; first after popping B, then A */ | |
3791 | PL_reg_flags ^= ST.toggle_reg_flags; | |
3792 | ReREFCNT_dec(rex); | |
28d8d7f4 | 3793 | SETREX(rex,ST.prev_rex); |
f8fc2ecf | 3794 | rexi = RXi_GET(rex); |
40a82448 DM |
3795 | PL_reginput = locinput; |
3796 | REGCP_UNWIND(ST.lastcp); | |
3797 | regcppop(rex); | |
faec1544 DM |
3798 | cur_eval = ST.prev_eval; |
3799 | cur_curlyx = ST.prev_curlyx; | |
3800 | /* XXXX This is too dramatic a measure... */ | |
3801 | PL_reg_maxiter = 0; | |
e7707071 | 3802 | if ( nochange_depth ) |
4b196cd4 | 3803 | nochange_depth--; |
40a82448 | 3804 | sayNO_SILENT; |
40a82448 DM |
3805 | #undef ST |
3806 | ||
a0d0e21e | 3807 | case OPEN: |
c277df42 | 3808 | n = ARG(scan); /* which paren pair */ |
3280af22 NIS |
3809 | PL_reg_start_tmp[n] = locinput; |
3810 | if (n > PL_regsize) | |
3811 | PL_regsize = n; | |
e2e6a0f1 | 3812 | lastopen = n; |
a0d0e21e LW |
3813 | break; |
3814 | case CLOSE: | |
c277df42 | 3815 | n = ARG(scan); /* which paren pair */ |
f0ab9afb NC |
3816 | PL_regoffs[n].start = PL_reg_start_tmp[n] - PL_bostr; |
3817 | PL_regoffs[n].end = locinput - PL_bostr; | |
7f69552c YO |
3818 | /*if (n > PL_regsize) |
3819 | PL_regsize = n;*/ | |
3b6647e0 | 3820 | if (n > *PL_reglastparen) |
3280af22 | 3821 | *PL_reglastparen = n; |
a01268b5 | 3822 | *PL_reglastcloseparen = n; |
3b6647e0 | 3823 | if (cur_eval && cur_eval->u.eval.close_paren == n) { |
6bda09f9 YO |
3824 | goto fake_end; |
3825 | } | |
a0d0e21e | 3826 | break; |
e2e6a0f1 YO |
3827 | case ACCEPT: |
3828 | if (ARG(scan)){ | |
3829 | regnode *cursor; | |
3830 | for (cursor=scan; | |
3831 | cursor && OP(cursor)!=END; | |
3832 | cursor=regnext(cursor)) | |
3833 | { | |
3834 | if ( OP(cursor)==CLOSE ){ | |
3835 | n = ARG(cursor); | |
3836 | if ( n <= lastopen ) { | |
f0ab9afb NC |
3837 | PL_regoffs[n].start |
3838 | = PL_reg_start_tmp[n] - PL_bostr; | |
3839 | PL_regoffs[n].end = locinput - PL_bostr; | |
e2e6a0f1 YO |
3840 | /*if (n > PL_regsize) |
3841 | PL_regsize = n;*/ | |
3b6647e0 | 3842 | if (n > *PL_reglastparen) |
e2e6a0f1 YO |
3843 | *PL_reglastparen = n; |
3844 | *PL_reglastcloseparen = n; | |
3b6647e0 RB |
3845 | if ( n == ARG(scan) || (cur_eval && |
3846 | cur_eval->u.eval.close_paren == n)) | |
e2e6a0f1 YO |
3847 | break; |
3848 | } | |
3849 | } | |
3850 | } | |
3851 | } | |
3852 | goto fake_end; | |
3853 | /*NOTREACHED*/ | |
c277df42 IZ |
3854 | case GROUPP: |
3855 | n = ARG(scan); /* which paren pair */ | |
f0ab9afb | 3856 | sw = (bool)(*PL_reglastparen >= n && PL_regoffs[n].end != -1); |
c277df42 | 3857 | break; |
0a4db386 YO |
3858 | case NGROUPP: |
3859 | /* reg_check_named_buff_matched returns 0 for no match */ | |
3860 | sw = (bool)(0 < reg_check_named_buff_matched(rex,scan)); | |
3861 | break; | |
1a147d38 | 3862 | case INSUBP: |
0a4db386 | 3863 | n = ARG(scan); |
3b6647e0 | 3864 | sw = (cur_eval && (!n || cur_eval->u.eval.close_paren == n)); |
0a4db386 YO |
3865 | break; |
3866 | case DEFINEP: | |
3867 | sw = 0; | |
3868 | break; | |
c277df42 | 3869 | case IFTHEN: |
2c2d71f5 | 3870 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
24d3c4a9 | 3871 | if (sw) |
c277df42 IZ |
3872 | next = NEXTOPER(NEXTOPER(scan)); |
3873 | else { | |
3874 | next = scan + ARG(scan); | |
3875 | if (OP(next) == IFTHEN) /* Fake one. */ | |
3876 | next = NEXTOPER(NEXTOPER(next)); | |
3877 | } | |
3878 | break; | |
3879 | case LOGICAL: | |
24d3c4a9 | 3880 | logical = scan->flags; |
c277df42 | 3881 | break; |
c476f425 | 3882 | |
2ab05381 | 3883 | /******************************************************************* |
2ab05381 | 3884 | |
c476f425 DM |
3885 | The CURLYX/WHILEM pair of ops handle the most generic case of the /A*B/ |
3886 | pattern, where A and B are subpatterns. (For simple A, CURLYM or | |
3887 | STAR/PLUS/CURLY/CURLYN are used instead.) | |
2ab05381 | 3888 | |
c476f425 | 3889 | A*B is compiled as <CURLYX><A><WHILEM><B> |
2ab05381 | 3890 | |
c476f425 DM |
3891 | On entry to the subpattern, CURLYX is called. This pushes a CURLYX |
3892 | state, which contains the current count, initialised to -1. It also sets | |
3893 | cur_curlyx to point to this state, with any previous value saved in the | |
3894 | state block. | |
2ab05381 | 3895 | |
c476f425 DM |
3896 | CURLYX then jumps straight to the WHILEM op, rather than executing A, |
3897 | since the pattern may possibly match zero times (i.e. it's a while {} loop | |
3898 | rather than a do {} while loop). | |
2ab05381 | 3899 | |
c476f425 DM |
3900 | Each entry to WHILEM represents a successful match of A. The count in the |
3901 | CURLYX block is incremented, another WHILEM state is pushed, and execution | |
3902 | passes to A or B depending on greediness and the current count. | |
2ab05381 | 3903 | |
c476f425 DM |
3904 | For example, if matching against the string a1a2a3b (where the aN are |
3905 | substrings that match /A/), then the match progresses as follows: (the | |
3906 | pushed states are interspersed with the bits of strings matched so far): | |
2ab05381 | 3907 | |
c476f425 DM |
3908 | <CURLYX cnt=-1> |
3909 | <CURLYX cnt=0><WHILEM> | |
3910 | <CURLYX cnt=1><WHILEM> a1 <WHILEM> | |
3911 | <CURLYX cnt=2><WHILEM> a1 <WHILEM> a2 <WHILEM> | |
3912 | <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> | |
3913 | <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> b | |
2ab05381 | 3914 | |
c476f425 DM |
3915 | (Contrast this with something like CURLYM, which maintains only a single |
3916 | backtrack state: | |
2ab05381 | 3917 | |
c476f425 DM |
3918 | <CURLYM cnt=0> a1 |
3919 | a1 <CURLYM cnt=1> a2 | |
3920 | a1 a2 <CURLYM cnt=2> a3 | |
3921 | a1 a2 a3 <CURLYM cnt=3> b | |
3922 | ) | |
2ab05381 | 3923 | |
c476f425 DM |
3924 | Each WHILEM state block marks a point to backtrack to upon partial failure |
3925 | of A or B, and also contains some minor state data related to that | |
3926 | iteration. The CURLYX block, pointed to by cur_curlyx, contains the | |
3927 | overall state, such as the count, and pointers to the A and B ops. | |
2ab05381 | 3928 | |
c476f425 DM |
3929 | This is complicated slightly by nested CURLYX/WHILEM's. Since cur_curlyx |
3930 | must always point to the *current* CURLYX block, the rules are: | |
2ab05381 | 3931 | |
c476f425 DM |
3932 | When executing CURLYX, save the old cur_curlyx in the CURLYX state block, |
3933 | and set cur_curlyx to point the new block. | |
2ab05381 | 3934 | |
c476f425 DM |
3935 | When popping the CURLYX block after a successful or unsuccessful match, |
3936 | restore the previous cur_curlyx. | |
2ab05381 | 3937 | |
c476f425 DM |
3938 | When WHILEM is about to execute B, save the current cur_curlyx, and set it |
3939 | to the outer one saved in the CURLYX block. | |
2ab05381 | 3940 | |
c476f425 DM |
3941 | When popping the WHILEM block after a successful or unsuccessful B match, |
3942 | restore the previous cur_curlyx. | |
2ab05381 | 3943 | |
c476f425 DM |
3944 | Here's an example for the pattern (AI* BI)*BO |
3945 | I and O refer to inner and outer, C and W refer to CURLYX and WHILEM: | |
2ab05381 | 3946 | |
c476f425 DM |
3947 | cur_ |
3948 | curlyx backtrack stack | |
3949 | ------ --------------- | |
3950 | NULL | |
3951 | CO <CO prev=NULL> <WO> | |
3952 | CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai | |
3953 | CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi | |
3954 | NULL <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi <WO prev=CO> bo | |
2ab05381 | 3955 | |
c476f425 DM |
3956 | At this point the pattern succeeds, and we work back down the stack to |
3957 | clean up, restoring as we go: | |
95b24440 | 3958 | |
c476f425 DM |
3959 | CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi |
3960 | CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai | |
3961 | CO <CO prev=NULL> <WO> | |
3962 | NULL | |
a0374537 | 3963 | |
c476f425 DM |
3964 | *******************************************************************/ |
3965 | ||
3966 | #define ST st->u.curlyx | |
3967 | ||
3968 | case CURLYX: /* start of /A*B/ (for complex A) */ | |
3969 | { | |
3970 | /* No need to save/restore up to this paren */ | |
3971 | I32 parenfloor = scan->flags; | |
3972 | ||
3973 | assert(next); /* keep Coverity happy */ | |
3974 | if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */ | |
3975 | next += ARG(next); | |
3976 | ||
3977 | /* XXXX Probably it is better to teach regpush to support | |
3978 | parenfloor > PL_regsize... */ | |
3979 | if (parenfloor > (I32)*PL_reglastparen) | |
3980 | parenfloor = *PL_reglastparen; /* Pessimization... */ | |
3981 | ||
3982 | ST.prev_curlyx= cur_curlyx; | |
3983 | cur_curlyx = st; | |
3984 | ST.cp = PL_savestack_ix; | |
3985 | ||
3986 | /* these fields contain the state of the current curly. | |
3987 | * they are accessed by subsequent WHILEMs */ | |
3988 | ST.parenfloor = parenfloor; | |
3989 | ST.min = ARG1(scan); | |
3990 | ST.max = ARG2(scan); | |
3991 | ST.A = NEXTOPER(scan) + EXTRA_STEP_2ARGS; | |
3992 | ST.B = next; | |
24d3c4a9 DM |
3993 | ST.minmod = minmod; |
3994 | minmod = 0; | |
c476f425 DM |
3995 | ST.count = -1; /* this will be updated by WHILEM */ |
3996 | ST.lastloc = NULL; /* this will be updated by WHILEM */ | |
3997 | ||
3998 | PL_reginput = locinput; | |
3999 | PUSH_YES_STATE_GOTO(CURLYX_end, PREVOPER(next)); | |
5f66b61c | 4000 | /* NOTREACHED */ |
c476f425 | 4001 | } |
a0d0e21e | 4002 | |
c476f425 | 4003 | case CURLYX_end: /* just finished matching all of A*B */ |
c476f425 DM |
4004 | cur_curlyx = ST.prev_curlyx; |
4005 | sayYES; | |
4006 | /* NOTREACHED */ | |
a0d0e21e | 4007 | |
c476f425 DM |
4008 | case CURLYX_end_fail: /* just failed to match all of A*B */ |
4009 | regcpblow(ST.cp); | |
4010 | cur_curlyx = ST.prev_curlyx; | |
4011 | sayNO; | |
4012 | /* NOTREACHED */ | |
4633a7c4 | 4013 | |
a0d0e21e | 4014 | |
c476f425 DM |
4015 | #undef ST |
4016 | #define ST st->u.whilem | |
4017 | ||
4018 | case WHILEM: /* just matched an A in /A*B/ (for complex A) */ | |
4019 | { | |
4020 | /* see the discussion above about CURLYX/WHILEM */ | |
c476f425 DM |
4021 | I32 n; |
4022 | assert(cur_curlyx); /* keep Coverity happy */ | |
4023 | n = ++cur_curlyx->u.curlyx.count; /* how many A's matched */ | |
4024 | ST.save_lastloc = cur_curlyx->u.curlyx.lastloc; | |
4025 | ST.cache_offset = 0; | |
4026 | ST.cache_mask = 0; | |
4027 | ||
4028 | PL_reginput = locinput; | |
4029 | ||
4030 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, | |
4031 | "%*s whilem: matched %ld out of %ld..%ld\n", | |
4032 | REPORT_CODE_OFF+depth*2, "", (long)n, | |
4033 | (long)cur_curlyx->u.curlyx.min, | |
4034 | (long)cur_curlyx->u.curlyx.max) | |
4035 | ); | |
a0d0e21e | 4036 | |
c476f425 | 4037 | /* First just match a string of min A's. */ |
a0d0e21e | 4038 | |
c476f425 DM |
4039 | if (n < cur_curlyx->u.curlyx.min) { |
4040 | cur_curlyx->u.curlyx.lastloc = locinput; | |
4041 | PUSH_STATE_GOTO(WHILEM_A_pre, cur_curlyx->u.curlyx.A); | |
4042 | /* NOTREACHED */ | |
4043 | } | |
4044 | ||
4045 | /* If degenerate A matches "", assume A done. */ | |
4046 | ||
4047 | if (locinput == cur_curlyx->u.curlyx.lastloc) { | |
4048 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, | |
4049 | "%*s whilem: empty match detected, trying continuation...\n", | |
4050 | REPORT_CODE_OFF+depth*2, "") | |
4051 | ); | |
4052 | goto do_whilem_B_max; | |
4053 | } | |
4054 | ||
4055 | /* super-linear cache processing */ | |
4056 | ||
4057 | if (scan->flags) { | |
a0d0e21e | 4058 | |
2c2d71f5 | 4059 | if (!PL_reg_maxiter) { |
c476f425 DM |
4060 | /* start the countdown: Postpone detection until we |
4061 | * know the match is not *that* much linear. */ | |
2c2d71f5 | 4062 | PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4); |
66bf836d DM |
4063 | /* possible overflow for long strings and many CURLYX's */ |
4064 | if (PL_reg_maxiter < 0) | |
4065 | PL_reg_maxiter = I32_MAX; | |
2c2d71f5 JH |
4066 | PL_reg_leftiter = PL_reg_maxiter; |
4067 | } | |
c476f425 | 4068 | |
2c2d71f5 | 4069 | if (PL_reg_leftiter-- == 0) { |
c476f425 | 4070 | /* initialise cache */ |
3298f257 | 4071 | const I32 size = (PL_reg_maxiter + 7)/8; |
2c2d71f5 | 4072 | if (PL_reg_poscache) { |
eb160463 | 4073 | if ((I32)PL_reg_poscache_size < size) { |
2c2d71f5 JH |
4074 | Renew(PL_reg_poscache, size, char); |
4075 | PL_reg_poscache_size = size; | |
4076 | } | |
4077 | Zero(PL_reg_poscache, size, char); | |
4078 | } | |
4079 | else { | |
4080 | PL_reg_poscache_size = size; | |
a02a5408 | 4081 | Newxz(PL_reg_poscache, size, char); |
2c2d71f5 | 4082 | } |
c476f425 DM |
4083 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
4084 | "%swhilem: Detected a super-linear match, switching on caching%s...\n", | |
4085 | PL_colors[4], PL_colors[5]) | |
4086 | ); | |
2c2d71f5 | 4087 | } |
c476f425 | 4088 | |
2c2d71f5 | 4089 | if (PL_reg_leftiter < 0) { |
c476f425 DM |
4090 | /* have we already failed at this position? */ |
4091 | I32 offset, mask; | |
4092 | offset = (scan->flags & 0xf) - 1 | |
4093 | + (locinput - PL_bostr) * (scan->flags>>4); | |
4094 | mask = 1 << (offset % 8); | |
4095 | offset /= 8; | |
4096 | if (PL_reg_poscache[offset] & mask) { | |
4097 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, | |
4098 | "%*s whilem: (cache) already tried at this position...\n", | |
4099 | REPORT_CODE_OFF+depth*2, "") | |
2c2d71f5 | 4100 | ); |
3298f257 | 4101 | sayNO; /* cache records failure */ |
2c2d71f5 | 4102 | } |
c476f425 DM |
4103 | ST.cache_offset = offset; |
4104 | ST.cache_mask = mask; | |
2c2d71f5 | 4105 | } |
c476f425 | 4106 | } |
2c2d71f5 | 4107 | |
c476f425 | 4108 | /* Prefer B over A for minimal matching. */ |
a687059c | 4109 | |
c476f425 DM |
4110 | if (cur_curlyx->u.curlyx.minmod) { |
4111 | ST.save_curlyx = cur_curlyx; | |
4112 | cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx; | |
4113 | ST.cp = regcppush(ST.save_curlyx->u.curlyx.parenfloor); | |
4114 | REGCP_SET(ST.lastcp); | |
4115 | PUSH_YES_STATE_GOTO(WHILEM_B_min, ST.save_curlyx->u.curlyx.B); | |
4116 | /* NOTREACHED */ | |
4117 | } | |
a0d0e21e | 4118 | |
c476f425 DM |
4119 | /* Prefer A over B for maximal matching. */ |
4120 | ||
4121 | if (n < cur_curlyx->u.curlyx.max) { /* More greed allowed? */ | |
4122 | ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor); | |
4123 | cur_curlyx->u.curlyx.lastloc = locinput; | |
4124 | REGCP_SET(ST.lastcp); | |
4125 | PUSH_STATE_GOTO(WHILEM_A_max, cur_curlyx->u.curlyx.A); | |
4126 | /* NOTREACHED */ | |
4127 | } | |
4128 | goto do_whilem_B_max; | |
4129 | } | |
4130 | /* NOTREACHED */ | |
4131 | ||
4132 | case WHILEM_B_min: /* just matched B in a minimal match */ | |
4133 | case WHILEM_B_max: /* just matched B in a maximal match */ | |
4134 | cur_curlyx = ST.save_curlyx; | |
4135 | sayYES; | |
4136 | /* NOTREACHED */ | |
4137 | ||
4138 | case WHILEM_B_max_fail: /* just failed to match B in a maximal match */ | |
4139 | cur_curlyx = ST.save_curlyx; | |
4140 | cur_curlyx->u.curlyx.lastloc = ST.save_lastloc; | |
4141 | cur_curlyx->u.curlyx.count--; | |
4142 | CACHEsayNO; | |
4143 | /* NOTREACHED */ | |
4144 | ||
4145 | case WHILEM_A_min_fail: /* just failed to match A in a minimal match */ | |
4146 | REGCP_UNWIND(ST.lastcp); | |
4147 | regcppop(rex); | |
4148 | /* FALL THROUGH */ | |
4149 | case WHILEM_A_pre_fail: /* just failed to match even minimal A */ | |
4150 | cur_curlyx->u.curlyx.lastloc = ST.save_lastloc; | |
4151 | cur_curlyx->u.curlyx.count--; | |
4152 | CACHEsayNO; | |
4153 | /* NOTREACHED */ | |
4154 | ||
4155 | case WHILEM_A_max_fail: /* just failed to match A in a maximal match */ | |
4156 | REGCP_UNWIND(ST.lastcp); | |
4157 | regcppop(rex); /* Restore some previous $<digit>s? */ | |
4158 | PL_reginput = locinput; | |
4159 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, | |
4160 | "%*s whilem: failed, trying continuation...\n", | |
4161 | REPORT_CODE_OFF+depth*2, "") | |
4162 | ); | |
4163 | do_whilem_B_max: | |
4164 | if (cur_curlyx->u.curlyx.count >= REG_INFTY | |
4165 | && ckWARN(WARN_REGEXP) | |
4166 | && !(PL_reg_flags & RF_warned)) | |
4167 | { | |
4168 | PL_reg_flags |= RF_warned; | |
4169 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s limit (%d) exceeded", | |
4170 | "Complex regular subexpression recursion", | |
4171 | REG_INFTY - 1); | |
4172 | } | |
4173 | ||
4174 | /* now try B */ | |
4175 | ST.save_curlyx = cur_curlyx; | |
4176 | cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx; | |
4177 | PUSH_YES_STATE_GOTO(WHILEM_B_max, ST.save_curlyx->u.curlyx.B); | |
4178 | /* NOTREACHED */ | |
4179 | ||
4180 | case WHILEM_B_min_fail: /* just failed to match B in a minimal match */ | |
4181 | cur_curlyx = ST.save_curlyx; | |
4182 | REGCP_UNWIND(ST.lastcp); | |
4183 | regcppop(rex); | |
4184 | ||
4185 | if (cur_curlyx->u.curlyx.count >= cur_curlyx->u.curlyx.max) { | |
4186 | /* Maximum greed exceeded */ | |
4187 | if (cur_curlyx->u.curlyx.count >= REG_INFTY | |
4188 | && ckWARN(WARN_REGEXP) | |
4189 | && !(PL_reg_flags & RF_warned)) | |
4190 | { | |
3280af22 | 4191 | PL_reg_flags |= RF_warned; |
c476f425 DM |
4192 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), |
4193 | "%s limit (%d) exceeded", | |
4194 | "Complex regular subexpression recursion", | |
4195 | REG_INFTY - 1); | |
a0d0e21e | 4196 | } |
c476f425 | 4197 | cur_curlyx->u.curlyx.count--; |
3ab3c9b4 | 4198 | CACHEsayNO; |
a0d0e21e | 4199 | } |
c476f425 DM |
4200 | |
4201 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, | |
4202 | "%*s trying longer...\n", REPORT_CODE_OFF+depth*2, "") | |
4203 | ); | |
4204 | /* Try grabbing another A and see if it helps. */ | |
4205 | PL_reginput = locinput; | |
4206 | cur_curlyx->u.curlyx.lastloc = locinput; | |
4207 | ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor); | |
4208 | REGCP_SET(ST.lastcp); | |
4209 | PUSH_STATE_GOTO(WHILEM_A_min, ST.save_curlyx->u.curlyx.A); | |
5f66b61c | 4210 | /* NOTREACHED */ |
40a82448 DM |
4211 | |
4212 | #undef ST | |
4213 | #define ST st->u.branch | |
4214 | ||
4215 | case BRANCHJ: /* /(...|A|...)/ with long next pointer */ | |
c277df42 IZ |
4216 | next = scan + ARG(scan); |
4217 | if (next == scan) | |
4218 | next = NULL; | |
40a82448 DM |
4219 | scan = NEXTOPER(scan); |
4220 | /* FALL THROUGH */ | |
c277df42 | 4221 | |
40a82448 DM |
4222 | case BRANCH: /* /(...|A|...)/ */ |
4223 | scan = NEXTOPER(scan); /* scan now points to inner node */ | |
5d458dd8 YO |
4224 | if ((!next || (OP(next) != BRANCH && OP(next) != BRANCHJ)) |
4225 | && !has_cutgroup) | |
4226 | { | |
40a82448 DM |
4227 | /* last branch; skip state push and jump direct to node */ |
4228 | continue; | |
5d458dd8 | 4229 | } |
40a82448 DM |
4230 | ST.lastparen = *PL_reglastparen; |
4231 | ST.next_branch = next; | |
4232 | REGCP_SET(ST.cp); | |
4233 | PL_reginput = locinput; | |
02db2b7b | 4234 | |
40a82448 | 4235 | /* Now go into the branch */ |
5d458dd8 YO |
4236 | if (has_cutgroup) { |
4237 | PUSH_YES_STATE_GOTO(BRANCH_next, scan); | |
4238 | } else { | |
4239 | PUSH_STATE_GOTO(BRANCH_next, scan); | |
4240 | } | |
40a82448 | 4241 | /* NOTREACHED */ |
5d458dd8 YO |
4242 | case CUTGROUP: |
4243 | PL_reginput = locinput; | |
4244 | sv_yes_mark = st->u.mark.mark_name = scan->flags ? NULL : | |
f8fc2ecf | 4245 | (SV*)rexi->data->data[ ARG( scan ) ]; |
5d458dd8 YO |
4246 | PUSH_STATE_GOTO(CUTGROUP_next,next); |
4247 | /* NOTREACHED */ | |
4248 | case CUTGROUP_next_fail: | |
4249 | do_cutgroup = 1; | |
4250 | no_final = 1; | |
4251 | if (st->u.mark.mark_name) | |
4252 | sv_commit = st->u.mark.mark_name; | |
4253 | sayNO; | |
4254 | /* NOTREACHED */ | |
4255 | case BRANCH_next: | |
4256 | sayYES; | |
4257 | /* NOTREACHED */ | |
40a82448 | 4258 | case BRANCH_next_fail: /* that branch failed; try the next, if any */ |
5d458dd8 YO |
4259 | if (do_cutgroup) { |
4260 | do_cutgroup = 0; | |
4261 | no_final = 0; | |
4262 | } | |
40a82448 DM |
4263 | REGCP_UNWIND(ST.cp); |
4264 | for (n = *PL_reglastparen; n > ST.lastparen; n--) | |
f0ab9afb | 4265 | PL_regoffs[n].end = -1; |
40a82448 | 4266 | *PL_reglastparen = n; |
0a4db386 | 4267 | /*dmq: *PL_reglastcloseparen = n; */ |
40a82448 DM |
4268 | scan = ST.next_branch; |
4269 | /* no more branches? */ | |
5d458dd8 YO |
4270 | if (!scan || (OP(scan) != BRANCH && OP(scan) != BRANCHJ)) { |
4271 | DEBUG_EXECUTE_r({ | |
4272 | PerlIO_printf( Perl_debug_log, | |
4273 | "%*s %sBRANCH failed...%s\n", | |
4274 | REPORT_CODE_OFF+depth*2, "", | |
4275 | PL_colors[4], | |
4276 | PL_colors[5] ); | |
4277 | }); | |
4278 | sayNO_SILENT; | |
4279 | } | |
40a82448 DM |
4280 | continue; /* execute next BRANCH[J] op */ |
4281 | /* NOTREACHED */ | |
4282 | ||
a0d0e21e | 4283 | case MINMOD: |
24d3c4a9 | 4284 | minmod = 1; |
a0d0e21e | 4285 | break; |
40a82448 DM |
4286 | |
4287 | #undef ST | |
4288 | #define ST st->u.curlym | |
4289 | ||
4290 | case CURLYM: /* /A{m,n}B/ where A is fixed-length */ | |
4291 | ||
4292 | /* This is an optimisation of CURLYX that enables us to push | |
4293 | * only a single backtracking state, no matter now many matches | |
4294 | * there are in {m,n}. It relies on the pattern being constant | |
4295 | * length, with no parens to influence future backrefs | |
4296 | */ | |
4297 | ||
4298 | ST.me = scan; | |
dc45a647 | 4299 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
40a82448 DM |
4300 | |
4301 | /* if paren positive, emulate an OPEN/CLOSE around A */ | |
4302 | if (ST.me->flags) { | |
3b6647e0 | 4303 | U32 paren = ST.me->flags; |
40a82448 DM |
4304 | if (paren > PL_regsize) |
4305 | PL_regsize = paren; | |
3b6647e0 | 4306 | if (paren > *PL_reglastparen) |
40a82448 | 4307 | *PL_reglastparen = paren; |
c277df42 | 4308 | scan += NEXT_OFF(scan); /* Skip former OPEN. */ |
6407bf3b | 4309 | } |
40a82448 DM |
4310 | ST.A = scan; |
4311 | ST.B = next; | |
4312 | ST.alen = 0; | |
4313 | ST.count = 0; | |
24d3c4a9 DM |
4314 | ST.minmod = minmod; |
4315 | minmod = 0; | |
40a82448 DM |
4316 | ST.c1 = CHRTEST_UNINIT; |
4317 | REGCP_SET(ST.cp); | |
6407bf3b | 4318 | |
40a82448 DM |
4319 | if (!(ST.minmod ? ARG1(ST.me) : ARG2(ST.me))) /* min/max */ |
4320 | goto curlym_do_B; | |
4321 | ||
4322 | curlym_do_A: /* execute the A in /A{m,n}B/ */ | |
6407bf3b | 4323 | PL_reginput = locinput; |
40a82448 DM |
4324 | PUSH_YES_STATE_GOTO(CURLYM_A, ST.A); /* match A */ |
4325 | /* NOTREACHED */ | |
5f80c4cf | 4326 | |
40a82448 DM |
4327 | case CURLYM_A: /* we've just matched an A */ |
4328 | locinput = st->locinput; | |
4329 | nextchr = UCHARAT(locinput); | |
4330 | ||
4331 | ST.count++; | |
4332 | /* after first match, determine A's length: u.curlym.alen */ | |
4333 | if (ST.count == 1) { | |
4334 | if (PL_reg_match_utf8) { | |
4335 | char *s = locinput; | |
4336 | while (s < PL_reginput) { | |
4337 | ST.alen++; | |
4338 | s += UTF8SKIP(s); | |
4339 | } | |
4340 | } | |
4341 | else { | |
4342 | ST.alen = PL_reginput - locinput; | |
4343 | } | |
4344 | if (ST.alen == 0) | |
4345 | ST.count = ST.minmod ? ARG1(ST.me) : ARG2(ST.me); | |
4346 | } | |
0cadcf80 DM |
4347 | DEBUG_EXECUTE_r( |
4348 | PerlIO_printf(Perl_debug_log, | |
40a82448 | 4349 | "%*s CURLYM now matched %"IVdf" times, len=%"IVdf"...\n", |
5bc10b2c | 4350 | (int)(REPORT_CODE_OFF+(depth*2)), "", |
40a82448 | 4351 | (IV) ST.count, (IV)ST.alen) |
0cadcf80 DM |
4352 | ); |
4353 | ||
40a82448 | 4354 | locinput = PL_reginput; |
0a4db386 YO |
4355 | |
4356 | if (cur_eval && cur_eval->u.eval.close_paren && | |
24b23f37 | 4357 | cur_eval->u.eval.close_paren == (U32)ST.me->flags) |
0a4db386 YO |
4358 | goto fake_end; |
4359 | ||
4360 | if ( ST.count < (ST.minmod ? ARG1(ST.me) : ARG2(ST.me)) ) | |
40a82448 DM |
4361 | goto curlym_do_A; /* try to match another A */ |
4362 | goto curlym_do_B; /* try to match B */ | |
5f80c4cf | 4363 | |
40a82448 DM |
4364 | case CURLYM_A_fail: /* just failed to match an A */ |
4365 | REGCP_UNWIND(ST.cp); | |
0a4db386 YO |
4366 | |
4367 | if (ST.minmod || ST.count < ARG1(ST.me) /* min*/ | |
4368 | || (cur_eval && cur_eval->u.eval.close_paren && | |
24b23f37 | 4369 | cur_eval->u.eval.close_paren == (U32)ST.me->flags)) |
40a82448 | 4370 | sayNO; |
0cadcf80 | 4371 | |
40a82448 DM |
4372 | curlym_do_B: /* execute the B in /A{m,n}B/ */ |
4373 | PL_reginput = locinput; | |
4374 | if (ST.c1 == CHRTEST_UNINIT) { | |
4375 | /* calculate c1 and c2 for possible match of 1st char | |
4376 | * following curly */ | |
4377 | ST.c1 = ST.c2 = CHRTEST_VOID; | |
4378 | if (HAS_TEXT(ST.B) || JUMPABLE(ST.B)) { | |
4379 | regnode *text_node = ST.B; | |
4380 | if (! HAS_TEXT(text_node)) | |
4381 | FIND_NEXT_IMPT(text_node); | |
ee9b8eae YO |
4382 | /* this used to be |
4383 | ||
4384 | (HAS_TEXT(text_node) && PL_regkind[OP(text_node)] == EXACT) | |
4385 | ||
4386 | But the former is redundant in light of the latter. | |
4387 | ||
4388 | if this changes back then the macro for | |
4389 | IS_TEXT and friends need to change. | |
4390 | */ | |
4391 | if (PL_regkind[OP(text_node)] == EXACT) | |
40a82448 | 4392 | { |
ee9b8eae | 4393 | |
40a82448 DM |
4394 | ST.c1 = (U8)*STRING(text_node); |
4395 | ST.c2 = | |
ee9b8eae | 4396 | (IS_TEXTF(text_node)) |
40a82448 | 4397 | ? PL_fold[ST.c1] |
ee9b8eae | 4398 | : (IS_TEXTFL(text_node)) |
40a82448 DM |
4399 | ? PL_fold_locale[ST.c1] |
4400 | : ST.c1; | |
c277df42 | 4401 | } |
c277df42 | 4402 | } |
40a82448 DM |
4403 | } |
4404 | ||
4405 | DEBUG_EXECUTE_r( | |
4406 | PerlIO_printf(Perl_debug_log, | |
4407 | "%*s CURLYM trying tail with matches=%"IVdf"...\n", | |
5bc10b2c | 4408 | (int)(REPORT_CODE_OFF+(depth*2)), |
40a82448 DM |
4409 | "", (IV)ST.count) |
4410 | ); | |
4411 | if (ST.c1 != CHRTEST_VOID | |
4412 | && UCHARAT(PL_reginput) != ST.c1 | |
4413 | && UCHARAT(PL_reginput) != ST.c2) | |
4414 | { | |
4415 | /* simulate B failing */ | |
3e901dc0 YO |
4416 | DEBUG_OPTIMISE_r( |
4417 | PerlIO_printf(Perl_debug_log, | |
4418 | "%*s CURLYM Fast bail c1=%"IVdf" c2=%"IVdf"\n", | |
4419 | (int)(REPORT_CODE_OFF+(depth*2)),"", | |
4420 | (IV)ST.c1,(IV)ST.c2 | |
4421 | )); | |
40a82448 DM |
4422 | state_num = CURLYM_B_fail; |
4423 | goto reenter_switch; | |
4424 | } | |
4425 | ||
4426 | if (ST.me->flags) { | |
4427 | /* mark current A as captured */ | |
4428 | I32 paren = ST.me->flags; | |
4429 | if (ST.count) { | |
f0ab9afb | 4430 | PL_regoffs[paren].start |
40a82448 | 4431 | = HOPc(PL_reginput, -ST.alen) - PL_bostr; |
f0ab9afb | 4432 | PL_regoffs[paren].end = PL_reginput - PL_bostr; |
0a4db386 | 4433 | /*dmq: *PL_reglastcloseparen = paren; */ |
c277df42 | 4434 | } |
40a82448 | 4435 | else |
f0ab9afb | 4436 | PL_regoffs[paren].end = -1; |
0a4db386 | 4437 | if (cur_eval && cur_eval->u.eval.close_paren && |
24b23f37 | 4438 | cur_eval->u.eval.close_paren == (U32)ST.me->flags) |
0a4db386 YO |
4439 | { |
4440 | if (ST.count) | |
4441 | goto fake_end; | |
4442 | else | |
4443 | sayNO; | |
4444 | } | |
c277df42 | 4445 | } |
0a4db386 | 4446 | |
40a82448 | 4447 | PUSH_STATE_GOTO(CURLYM_B, ST.B); /* match B */ |
5f66b61c | 4448 | /* NOTREACHED */ |
40a82448 DM |
4449 | |
4450 | case CURLYM_B_fail: /* just failed to match a B */ | |
4451 | REGCP_UNWIND(ST.cp); | |
4452 | if (ST.minmod) { | |
4453 | if (ST.count == ARG2(ST.me) /* max */) | |
4454 | sayNO; | |
4455 | goto curlym_do_A; /* try to match a further A */ | |
4456 | } | |
4457 | /* backtrack one A */ | |
4458 | if (ST.count == ARG1(ST.me) /* min */) | |
4459 | sayNO; | |
4460 | ST.count--; | |
4461 | locinput = HOPc(locinput, -ST.alen); | |
4462 | goto curlym_do_B; /* try to match B */ | |
4463 | ||
c255a977 DM |
4464 | #undef ST |
4465 | #define ST st->u.curly | |
40a82448 | 4466 | |
c255a977 DM |
4467 | #define CURLY_SETPAREN(paren, success) \ |
4468 | if (paren) { \ | |
4469 | if (success) { \ | |
f0ab9afb NC |
4470 | PL_regoffs[paren].start = HOPc(locinput, -1) - PL_bostr; \ |
4471 | PL_regoffs[paren].end = locinput - PL_bostr; \ | |
0a4db386 | 4472 | *PL_reglastcloseparen = paren; \ |
c255a977 DM |
4473 | } \ |
4474 | else \ | |
f0ab9afb | 4475 | PL_regoffs[paren].end = -1; \ |
c255a977 DM |
4476 | } |
4477 | ||
4478 | case STAR: /* /A*B/ where A is width 1 */ | |
4479 | ST.paren = 0; | |
4480 | ST.min = 0; | |
4481 | ST.max = REG_INFTY; | |
a0d0e21e LW |
4482 | scan = NEXTOPER(scan); |
4483 | goto repeat; | |
c255a977 DM |
4484 | case PLUS: /* /A+B/ where A is width 1 */ |
4485 | ST.paren = 0; | |
4486 | ST.min = 1; | |
4487 | ST.max = REG_INFTY; | |
c277df42 | 4488 | scan = NEXTOPER(scan); |
c255a977 DM |
4489 | goto repeat; |
4490 | case CURLYN: /* /(A){m,n}B/ where A is width 1 */ | |
4491 | ST.paren = scan->flags; /* Which paren to set */ | |
4492 | if (ST.paren > PL_regsize) | |
4493 | PL_regsize = ST.paren; | |
3b6647e0 | 4494 | if (ST.paren > *PL_reglastparen) |
c255a977 DM |
4495 | *PL_reglastparen = ST.paren; |
4496 | ST.min = ARG1(scan); /* min to match */ | |
4497 | ST.max = ARG2(scan); /* max to match */ | |
0a4db386 | 4498 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 4499 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
0a4db386 YO |
4500 | ST.min=1; |
4501 | ST.max=1; | |
4502 | } | |
c255a977 DM |
4503 | scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE); |
4504 | goto repeat; | |
4505 | case CURLY: /* /A{m,n}B/ where A is width 1 */ | |
4506 | ST.paren = 0; | |
4507 | ST.min = ARG1(scan); /* min to match */ | |
4508 | ST.max = ARG2(scan); /* max to match */ | |
4509 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; | |
c277df42 | 4510 | repeat: |
a0d0e21e LW |
4511 | /* |
4512 | * Lookahead to avoid useless match attempts | |
4513 | * when we know what character comes next. | |
c255a977 | 4514 | * |
5f80c4cf JP |
4515 | * Used to only do .*x and .*?x, but now it allows |
4516 | * for )'s, ('s and (?{ ... })'s to be in the way | |
4517 | * of the quantifier and the EXACT-like node. -- japhy | |
4518 | */ | |
4519 | ||
c255a977 DM |
4520 | if (ST.min > ST.max) /* XXX make this a compile-time check? */ |
4521 | sayNO; | |
cca55fe3 | 4522 | if (HAS_TEXT(next) || JUMPABLE(next)) { |
5f80c4cf JP |
4523 | U8 *s; |
4524 | regnode *text_node = next; | |
4525 | ||
3dab1dad YO |
4526 | if (! HAS_TEXT(text_node)) |
4527 | FIND_NEXT_IMPT(text_node); | |
5f80c4cf | 4528 | |
9e137952 | 4529 | if (! HAS_TEXT(text_node)) |
c255a977 | 4530 | ST.c1 = ST.c2 = CHRTEST_VOID; |
5f80c4cf | 4531 | else { |
ee9b8eae | 4532 | if ( PL_regkind[OP(text_node)] != EXACT ) { |
c255a977 | 4533 | ST.c1 = ST.c2 = CHRTEST_VOID; |
44a68960 | 4534 | goto assume_ok_easy; |
cca55fe3 | 4535 | } |
be8e71aa YO |
4536 | else |
4537 | s = (U8*)STRING(text_node); | |
ee9b8eae YO |
4538 | |
4539 | /* Currently we only get here when | |
4540 | ||
4541 | PL_rekind[OP(text_node)] == EXACT | |
4542 | ||
4543 | if this changes back then the macro for IS_TEXT and | |
4544 | friends need to change. */ | |
5f80c4cf | 4545 | if (!UTF) { |
c255a977 | 4546 | ST.c2 = ST.c1 = *s; |
ee9b8eae | 4547 | if (IS_TEXTF(text_node)) |
c255a977 | 4548 | ST.c2 = PL_fold[ST.c1]; |
ee9b8eae | 4549 | else if (IS_TEXTFL(text_node)) |
c255a977 | 4550 | ST.c2 = PL_fold_locale[ST.c1]; |
1aa99e6b | 4551 | } |
5f80c4cf | 4552 | else { /* UTF */ |
ee9b8eae | 4553 | if (IS_TEXTF(text_node)) { |
a2a2844f | 4554 | STRLEN ulen1, ulen2; |
89ebb4a3 JH |
4555 | U8 tmpbuf1[UTF8_MAXBYTES_CASE+1]; |
4556 | U8 tmpbuf2[UTF8_MAXBYTES_CASE+1]; | |
a2a2844f JH |
4557 | |
4558 | to_utf8_lower((U8*)s, tmpbuf1, &ulen1); | |
4559 | to_utf8_upper((U8*)s, tmpbuf2, &ulen2); | |
e294cc5d JH |
4560 | #ifdef EBCDIC |
4561 | ST.c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXLEN, 0, | |
4562 | ckWARN(WARN_UTF8) ? | |
4563 | 0 : UTF8_ALLOW_ANY); | |
4564 | ST.c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXLEN, 0, | |
4565 | ckWARN(WARN_UTF8) ? | |
4566 | 0 : UTF8_ALLOW_ANY); | |
4567 | #else | |
c255a977 | 4568 | ST.c1 = utf8n_to_uvuni(tmpbuf1, UTF8_MAXBYTES, 0, |
e294cc5d | 4569 | uniflags); |
c255a977 | 4570 | ST.c2 = utf8n_to_uvuni(tmpbuf2, UTF8_MAXBYTES, 0, |
e294cc5d JH |
4571 | uniflags); |
4572 | #endif | |
5f80c4cf JP |
4573 | } |
4574 | else { | |
c255a977 | 4575 | ST.c2 = ST.c1 = utf8n_to_uvchr(s, UTF8_MAXBYTES, 0, |
041457d9 | 4576 | uniflags); |
5f80c4cf | 4577 | } |
1aa99e6b IH |
4578 | } |
4579 | } | |
bbce6d69 | 4580 | } |
a0d0e21e | 4581 | else |
c255a977 | 4582 | ST.c1 = ST.c2 = CHRTEST_VOID; |
cca55fe3 | 4583 | assume_ok_easy: |
c255a977 DM |
4584 | |
4585 | ST.A = scan; | |
4586 | ST.B = next; | |
3280af22 | 4587 | PL_reginput = locinput; |
24d3c4a9 DM |
4588 | if (minmod) { |
4589 | minmod = 0; | |
e2e6a0f1 | 4590 | if (ST.min && regrepeat(rex, ST.A, ST.min, depth) < ST.min) |
4633a7c4 | 4591 | sayNO; |
c255a977 | 4592 | ST.count = ST.min; |
a0ed51b3 | 4593 | locinput = PL_reginput; |
c255a977 DM |
4594 | REGCP_SET(ST.cp); |
4595 | if (ST.c1 == CHRTEST_VOID) | |
4596 | goto curly_try_B_min; | |
4597 | ||
4598 | ST.oldloc = locinput; | |
4599 | ||
4600 | /* set ST.maxpos to the furthest point along the | |
4601 | * string that could possibly match */ | |
4602 | if (ST.max == REG_INFTY) { | |
4603 | ST.maxpos = PL_regeol - 1; | |
4604 | if (do_utf8) | |
4605 | while (UTF8_IS_CONTINUATION(*(U8*)ST.maxpos)) | |
4606 | ST.maxpos--; | |
4607 | } | |
4608 | else if (do_utf8) { | |
4609 | int m = ST.max - ST.min; | |
4610 | for (ST.maxpos = locinput; | |
4611 | m >0 && ST.maxpos + UTF8SKIP(ST.maxpos) <= PL_regeol; m--) | |
4612 | ST.maxpos += UTF8SKIP(ST.maxpos); | |
4613 | } | |
4614 | else { | |
4615 | ST.maxpos = locinput + ST.max - ST.min; | |
4616 | if (ST.maxpos >= PL_regeol) | |
4617 | ST.maxpos = PL_regeol - 1; | |
4618 | } | |
4619 | goto curly_try_B_min_known; | |
4620 | ||
4621 | } | |
4622 | else { | |
e2e6a0f1 | 4623 | ST.count = regrepeat(rex, ST.A, ST.max, depth); |
c255a977 DM |
4624 | locinput = PL_reginput; |
4625 | if (ST.count < ST.min) | |
4626 | sayNO; | |
4627 | if ((ST.count > ST.min) | |
4628 | && (PL_regkind[OP(ST.B)] == EOL) && (OP(ST.B) != MEOL)) | |
4629 | { | |
4630 | /* A{m,n} must come at the end of the string, there's | |
4631 | * no point in backing off ... */ | |
4632 | ST.min = ST.count; | |
4633 | /* ...except that $ and \Z can match before *and* after | |
4634 | newline at the end. Consider "\n\n" =~ /\n+\Z\n/. | |
4635 | We may back off by one in this case. */ | |
4636 | if (UCHARAT(PL_reginput - 1) == '\n' && OP(ST.B) != EOS) | |
4637 | ST.min--; | |
4638 | } | |
4639 | REGCP_SET(ST.cp); | |
4640 | goto curly_try_B_max; | |
4641 | } | |
4642 | /* NOTREACHED */ | |
4643 | ||
4644 | ||
4645 | case CURLY_B_min_known_fail: | |
4646 | /* failed to find B in a non-greedy match where c1,c2 valid */ | |
4647 | if (ST.paren && ST.count) | |
f0ab9afb | 4648 | PL_regoffs[ST.paren].end = -1; |
c255a977 DM |
4649 | |
4650 | PL_reginput = locinput; /* Could be reset... */ | |
4651 | REGCP_UNWIND(ST.cp); | |
4652 | /* Couldn't or didn't -- move forward. */ | |
4653 | ST.oldloc = locinput; | |
4654 | if (do_utf8) | |
4655 | locinput += UTF8SKIP(locinput); | |
4656 | else | |
4657 | locinput++; | |
4658 | ST.count++; | |
4659 | curly_try_B_min_known: | |
4660 | /* find the next place where 'B' could work, then call B */ | |
4661 | { | |
4662 | int n; | |
4663 | if (do_utf8) { | |
4664 | n = (ST.oldloc == locinput) ? 0 : 1; | |
4665 | if (ST.c1 == ST.c2) { | |
4666 | STRLEN len; | |
4667 | /* set n to utf8_distance(oldloc, locinput) */ | |
4668 | while (locinput <= ST.maxpos && | |
4669 | utf8n_to_uvchr((U8*)locinput, | |
4670 | UTF8_MAXBYTES, &len, | |
4671 | uniflags) != (UV)ST.c1) { | |
4672 | locinput += len; | |
4673 | n++; | |
4674 | } | |
1aa99e6b IH |
4675 | } |
4676 | else { | |
c255a977 DM |
4677 | /* set n to utf8_distance(oldloc, locinput) */ |
4678 | while (locinput <= ST.maxpos) { | |
4679 | STRLEN len; | |
4680 | const UV c = utf8n_to_uvchr((U8*)locinput, | |
4681 | UTF8_MAXBYTES, &len, | |
4682 | uniflags); | |
4683 | if (c == (UV)ST.c1 || c == (UV)ST.c2) | |
4684 | break; | |
4685 | locinput += len; | |
4686 | n++; | |
1aa99e6b | 4687 | } |
0fe9bf95 IZ |
4688 | } |
4689 | } | |
c255a977 DM |
4690 | else { |
4691 | if (ST.c1 == ST.c2) { | |
4692 | while (locinput <= ST.maxpos && | |
4693 | UCHARAT(locinput) != ST.c1) | |
4694 | locinput++; | |
bbce6d69 | 4695 | } |
c255a977 DM |
4696 | else { |
4697 | while (locinput <= ST.maxpos | |
4698 | && UCHARAT(locinput) != ST.c1 | |
4699 | && UCHARAT(locinput) != ST.c2) | |
4700 | locinput++; | |
a0ed51b3 | 4701 | } |
c255a977 DM |
4702 | n = locinput - ST.oldloc; |
4703 | } | |
4704 | if (locinput > ST.maxpos) | |
4705 | sayNO; | |
4706 | /* PL_reginput == oldloc now */ | |
4707 | if (n) { | |
4708 | ST.count += n; | |
e2e6a0f1 | 4709 | if (regrepeat(rex, ST.A, n, depth) < n) |
4633a7c4 | 4710 | sayNO; |
a0d0e21e | 4711 | } |
c255a977 DM |
4712 | PL_reginput = locinput; |
4713 | CURLY_SETPAREN(ST.paren, ST.count); | |
0a4db386 | 4714 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 4715 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
0a4db386 YO |
4716 | goto fake_end; |
4717 | } | |
c255a977 | 4718 | PUSH_STATE_GOTO(CURLY_B_min_known, ST.B); |
a0d0e21e | 4719 | } |
c255a977 DM |
4720 | /* NOTREACHED */ |
4721 | ||
4722 | ||
4723 | case CURLY_B_min_fail: | |
4724 | /* failed to find B in a non-greedy match where c1,c2 invalid */ | |
4725 | if (ST.paren && ST.count) | |
f0ab9afb | 4726 | PL_regoffs[ST.paren].end = -1; |
c255a977 DM |
4727 | |
4728 | REGCP_UNWIND(ST.cp); | |
4729 | /* failed -- move forward one */ | |
4730 | PL_reginput = locinput; | |
e2e6a0f1 | 4731 | if (regrepeat(rex, ST.A, 1, depth)) { |
c255a977 | 4732 | ST.count++; |
a0ed51b3 | 4733 | locinput = PL_reginput; |
c255a977 DM |
4734 | if (ST.count <= ST.max || (ST.max == REG_INFTY && |
4735 | ST.count > 0)) /* count overflow ? */ | |
15272685 | 4736 | { |
c255a977 DM |
4737 | curly_try_B_min: |
4738 | CURLY_SETPAREN(ST.paren, ST.count); | |
0a4db386 | 4739 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 4740 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
0a4db386 YO |
4741 | goto fake_end; |
4742 | } | |
c255a977 | 4743 | PUSH_STATE_GOTO(CURLY_B_min, ST.B); |
a0d0e21e LW |
4744 | } |
4745 | } | |
4633a7c4 | 4746 | sayNO; |
c255a977 DM |
4747 | /* NOTREACHED */ |
4748 | ||
4749 | ||
4750 | curly_try_B_max: | |
4751 | /* a successful greedy match: now try to match B */ | |
40d049e4 | 4752 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 4753 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
40d049e4 YO |
4754 | goto fake_end; |
4755 | } | |
c255a977 DM |
4756 | { |
4757 | UV c = 0; | |
4758 | if (ST.c1 != CHRTEST_VOID) | |
4759 | c = do_utf8 ? utf8n_to_uvchr((U8*)PL_reginput, | |
4760 | UTF8_MAXBYTES, 0, uniflags) | |
466787eb | 4761 | : (UV) UCHARAT(PL_reginput); |
c255a977 DM |
4762 | /* If it could work, try it. */ |
4763 | if (ST.c1 == CHRTEST_VOID || c == (UV)ST.c1 || c == (UV)ST.c2) { | |
4764 | CURLY_SETPAREN(ST.paren, ST.count); | |
4765 | PUSH_STATE_GOTO(CURLY_B_max, ST.B); | |
4766 | /* NOTREACHED */ | |
4767 | } | |
4768 | } | |
4769 | /* FALL THROUGH */ | |
4770 | case CURLY_B_max_fail: | |
4771 | /* failed to find B in a greedy match */ | |
4772 | if (ST.paren && ST.count) | |
f0ab9afb | 4773 | PL_regoffs[ST.paren].end = -1; |
c255a977 DM |
4774 | |
4775 | REGCP_UNWIND(ST.cp); | |
4776 | /* back up. */ | |
4777 | if (--ST.count < ST.min) | |
4778 | sayNO; | |
4779 | PL_reginput = locinput = HOPc(locinput, -1); | |
4780 | goto curly_try_B_max; | |
4781 | ||
4782 | #undef ST | |
4783 | ||
a0d0e21e | 4784 | case END: |
6bda09f9 | 4785 | fake_end: |
faec1544 DM |
4786 | if (cur_eval) { |
4787 | /* we've just finished A in /(??{A})B/; now continue with B */ | |
4788 | I32 tmpix; | |
faec1544 DM |
4789 | st->u.eval.toggle_reg_flags |
4790 | = cur_eval->u.eval.toggle_reg_flags; | |
4791 | PL_reg_flags ^= st->u.eval.toggle_reg_flags; | |
4792 | ||
4793 | st->u.eval.prev_rex = rex; /* inner */ | |
28d8d7f4 | 4794 | SETREX(rex,cur_eval->u.eval.prev_rex); |
f8fc2ecf | 4795 | rexi = RXi_GET(rex); |
faec1544 DM |
4796 | cur_curlyx = cur_eval->u.eval.prev_curlyx; |
4797 | ReREFCNT_inc(rex); | |
4798 | st->u.eval.cp = regcppush(0); /* Save *all* the positions. */ | |
4799 | REGCP_SET(st->u.eval.lastcp); | |
4800 | PL_reginput = locinput; | |
4801 | ||
4802 | /* Restore parens of the outer rex without popping the | |
4803 | * savestack */ | |
4804 | tmpix = PL_savestack_ix; | |
4805 | PL_savestack_ix = cur_eval->u.eval.lastcp; | |
4806 | regcppop(rex); | |
4807 | PL_savestack_ix = tmpix; | |
4808 | ||
4809 | st->u.eval.prev_eval = cur_eval; | |
4810 | cur_eval = cur_eval->u.eval.prev_eval; | |
4811 | DEBUG_EXECUTE_r( | |
2a49f0f5 JH |
4812 | PerlIO_printf(Perl_debug_log, "%*s EVAL trying tail ... %"UVxf"\n", |
4813 | REPORT_CODE_OFF+depth*2, "",PTR2UV(cur_eval));); | |
e7707071 YO |
4814 | if ( nochange_depth ) |
4815 | nochange_depth--; | |
4816 | ||
4817 | PUSH_YES_STATE_GOTO(EVAL_AB, | |
faec1544 DM |
4818 | st->u.eval.prev_eval->u.eval.B); /* match B */ |
4819 | } | |
4820 | ||
3b0527fe | 4821 | if (locinput < reginfo->till) { |
a3621e74 | 4822 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
7821416a IZ |
4823 | "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n", |
4824 | PL_colors[4], | |
4825 | (long)(locinput - PL_reg_starttry), | |
3b0527fe | 4826 | (long)(reginfo->till - PL_reg_starttry), |
7821416a | 4827 | PL_colors[5])); |
58e23c8d | 4828 | |
262b90c4 | 4829 | sayNO_SILENT; /* Cannot match: too short. */ |
7821416a IZ |
4830 | } |
4831 | PL_reginput = locinput; /* put where regtry can find it */ | |
262b90c4 | 4832 | sayYES; /* Success! */ |
dad79028 DM |
4833 | |
4834 | case SUCCEED: /* successful SUSPEND/UNLESSM/IFMATCH/CURLYM */ | |
4835 | DEBUG_EXECUTE_r( | |
4836 | PerlIO_printf(Perl_debug_log, | |
4837 | "%*s %ssubpattern success...%s\n", | |
5bc10b2c | 4838 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])); |
3280af22 | 4839 | PL_reginput = locinput; /* put where regtry can find it */ |
262b90c4 | 4840 | sayYES; /* Success! */ |
dad79028 | 4841 | |
40a82448 DM |
4842 | #undef ST |
4843 | #define ST st->u.ifmatch | |
4844 | ||
4845 | case SUSPEND: /* (?>A) */ | |
4846 | ST.wanted = 1; | |
9fe1d20c | 4847 | PL_reginput = locinput; |
9041c2e3 | 4848 | goto do_ifmatch; |
dad79028 | 4849 | |
40a82448 DM |
4850 | case UNLESSM: /* -ve lookaround: (?!A), or with flags, (?<!A) */ |
4851 | ST.wanted = 0; | |
dad79028 DM |
4852 | goto ifmatch_trivial_fail_test; |
4853 | ||
40a82448 DM |
4854 | case IFMATCH: /* +ve lookaround: (?=A), or with flags, (?<=A) */ |
4855 | ST.wanted = 1; | |
dad79028 | 4856 | ifmatch_trivial_fail_test: |
a0ed51b3 | 4857 | if (scan->flags) { |
52657f30 | 4858 | char * const s = HOPBACKc(locinput, scan->flags); |
dad79028 DM |
4859 | if (!s) { |
4860 | /* trivial fail */ | |
24d3c4a9 DM |
4861 | if (logical) { |
4862 | logical = 0; | |
4863 | sw = 1 - (bool)ST.wanted; | |
dad79028 | 4864 | } |
40a82448 | 4865 | else if (ST.wanted) |
dad79028 DM |
4866 | sayNO; |
4867 | next = scan + ARG(scan); | |
4868 | if (next == scan) | |
4869 | next = NULL; | |
4870 | break; | |
4871 | } | |
efb30f32 | 4872 | PL_reginput = s; |
a0ed51b3 LW |
4873 | } |
4874 | else | |
4875 | PL_reginput = locinput; | |
4876 | ||
c277df42 | 4877 | do_ifmatch: |
40a82448 | 4878 | ST.me = scan; |
24d3c4a9 | 4879 | ST.logical = logical; |
40a82448 DM |
4880 | /* execute body of (?...A) */ |
4881 | PUSH_YES_STATE_GOTO(IFMATCH_A, NEXTOPER(NEXTOPER(scan))); | |
4882 | /* NOTREACHED */ | |
4883 | ||
4884 | case IFMATCH_A_fail: /* body of (?...A) failed */ | |
4885 | ST.wanted = !ST.wanted; | |
4886 | /* FALL THROUGH */ | |
4887 | ||
4888 | case IFMATCH_A: /* body of (?...A) succeeded */ | |
24d3c4a9 DM |
4889 | if (ST.logical) { |
4890 | sw = (bool)ST.wanted; | |
40a82448 DM |
4891 | } |
4892 | else if (!ST.wanted) | |
4893 | sayNO; | |
4894 | ||
4895 | if (OP(ST.me) == SUSPEND) | |
4896 | locinput = PL_reginput; | |
4897 | else { | |
4898 | locinput = PL_reginput = st->locinput; | |
4899 | nextchr = UCHARAT(locinput); | |
4900 | } | |
4901 | scan = ST.me + ARG(ST.me); | |
4902 | if (scan == ST.me) | |
4903 | scan = NULL; | |
4904 | continue; /* execute B */ | |
4905 | ||
4906 | #undef ST | |
dad79028 | 4907 | |
c277df42 | 4908 | case LONGJMP: |
c277df42 IZ |
4909 | next = scan + ARG(scan); |
4910 | if (next == scan) | |
4911 | next = NULL; | |
a0d0e21e | 4912 | break; |
54612592 | 4913 | case COMMIT: |
e2e6a0f1 YO |
4914 | reginfo->cutpoint = PL_regeol; |
4915 | /* FALLTHROUGH */ | |
5d458dd8 | 4916 | case PRUNE: |
24b23f37 | 4917 | PL_reginput = locinput; |
e2e6a0f1 | 4918 | if (!scan->flags) |
f8fc2ecf | 4919 | sv_yes_mark = sv_commit = (SV*)rexi->data->data[ ARG( scan ) ]; |
54612592 YO |
4920 | PUSH_STATE_GOTO(COMMIT_next,next); |
4921 | /* NOTREACHED */ | |
4922 | case COMMIT_next_fail: | |
4923 | no_final = 1; | |
4924 | /* FALLTHROUGH */ | |
7f69552c YO |
4925 | case OPFAIL: |
4926 | sayNO; | |
e2e6a0f1 YO |
4927 | /* NOTREACHED */ |
4928 | ||
4929 | #define ST st->u.mark | |
4930 | case MARKPOINT: | |
4931 | ST.prev_mark = mark_state; | |
5d458dd8 | 4932 | ST.mark_name = sv_commit = sv_yes_mark |
f8fc2ecf | 4933 | = (SV*)rexi->data->data[ ARG( scan ) ]; |
e2e6a0f1 YO |
4934 | mark_state = st; |
4935 | ST.mark_loc = PL_reginput = locinput; | |
4936 | PUSH_YES_STATE_GOTO(MARKPOINT_next,next); | |
4937 | /* NOTREACHED */ | |
4938 | case MARKPOINT_next: | |
4939 | mark_state = ST.prev_mark; | |
4940 | sayYES; | |
4941 | /* NOTREACHED */ | |
4942 | case MARKPOINT_next_fail: | |
5d458dd8 | 4943 | if (popmark && sv_eq(ST.mark_name,popmark)) |
e2e6a0f1 YO |
4944 | { |
4945 | if (ST.mark_loc > startpoint) | |
4946 | reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1); | |
4947 | popmark = NULL; /* we found our mark */ | |
4948 | sv_commit = ST.mark_name; | |
4949 | ||
4950 | DEBUG_EXECUTE_r({ | |
5d458dd8 | 4951 | PerlIO_printf(Perl_debug_log, |
e2e6a0f1 YO |
4952 | "%*s %ssetting cutpoint to mark:%"SVf"...%s\n", |
4953 | REPORT_CODE_OFF+depth*2, "", | |
be2597df | 4954 | PL_colors[4], SVfARG(sv_commit), PL_colors[5]); |
e2e6a0f1 YO |
4955 | }); |
4956 | } | |
4957 | mark_state = ST.prev_mark; | |
5d458dd8 YO |
4958 | sv_yes_mark = mark_state ? |
4959 | mark_state->u.mark.mark_name : NULL; | |
e2e6a0f1 YO |
4960 | sayNO; |
4961 | /* NOTREACHED */ | |
5d458dd8 YO |
4962 | case SKIP: |
4963 | PL_reginput = locinput; | |
4964 | if (scan->flags) { | |
2bf803e2 | 4965 | /* (*SKIP) : if we fail we cut here*/ |
5d458dd8 | 4966 | ST.mark_name = NULL; |
e2e6a0f1 | 4967 | ST.mark_loc = locinput; |
5d458dd8 YO |
4968 | PUSH_STATE_GOTO(SKIP_next,next); |
4969 | } else { | |
2bf803e2 | 4970 | /* (*SKIP:NAME) : if there is a (*MARK:NAME) fail where it was, |
5d458dd8 YO |
4971 | otherwise do nothing. Meaning we need to scan |
4972 | */ | |
4973 | regmatch_state *cur = mark_state; | |
f8fc2ecf | 4974 | SV *find = (SV*)rexi->data->data[ ARG( scan ) ]; |
5d458dd8 YO |
4975 | |
4976 | while (cur) { | |
4977 | if ( sv_eq( cur->u.mark.mark_name, | |
4978 | find ) ) | |
4979 | { | |
4980 | ST.mark_name = find; | |
4981 | PUSH_STATE_GOTO( SKIP_next, next ); | |
4982 | } | |
4983 | cur = cur->u.mark.prev_mark; | |
4984 | } | |
e2e6a0f1 | 4985 | } |
2bf803e2 | 4986 | /* Didn't find our (*MARK:NAME) so ignore this (*SKIP:NAME) */ |
5d458dd8 YO |
4987 | break; |
4988 | case SKIP_next_fail: | |
4989 | if (ST.mark_name) { | |
4990 | /* (*CUT:NAME) - Set up to search for the name as we | |
4991 | collapse the stack*/ | |
4992 | popmark = ST.mark_name; | |
4993 | } else { | |
4994 | /* (*CUT) - No name, we cut here.*/ | |
e2e6a0f1 YO |
4995 | if (ST.mark_loc > startpoint) |
4996 | reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1); | |
5d458dd8 YO |
4997 | /* but we set sv_commit to latest mark_name if there |
4998 | is one so they can test to see how things lead to this | |
4999 | cut */ | |
5000 | if (mark_state) | |
5001 | sv_commit=mark_state->u.mark.mark_name; | |
5002 | } | |
e2e6a0f1 YO |
5003 | no_final = 1; |
5004 | sayNO; | |
5005 | /* NOTREACHED */ | |
5006 | #undef ST | |
5007 | ||
e1d1eefb YO |
5008 | case LNBREAK: |
5009 | if ((n=is_LNBREAK(locinput,do_utf8))) { | |
5010 | locinput += n; | |
5011 | nextchr = UCHARAT(locinput); | |
5012 | } else | |
5013 | sayNO; | |
5014 | break; | |
5015 | ||
5016 | #define CASE_CLASS(nAmE) \ | |
5017 | case nAmE: \ | |
5018 | if ((n=is_##nAmE(locinput,do_utf8))) { \ | |
5019 | locinput += n; \ | |
5020 | nextchr = UCHARAT(locinput); \ | |
5021 | } else \ | |
5022 | sayNO; \ | |
5023 | break; \ | |
5024 | case N##nAmE: \ | |
5025 | if ((n=is_##nAmE(locinput,do_utf8))) { \ | |
5026 | sayNO; \ | |
5027 | } else { \ | |
5028 | locinput += UTF8SKIP(locinput); \ | |
5029 | nextchr = UCHARAT(locinput); \ | |
5030 | } \ | |
5031 | break | |
5032 | ||
5033 | CASE_CLASS(VERTWS); | |
5034 | CASE_CLASS(HORIZWS); | |
5035 | #undef CASE_CLASS | |
5036 | ||
a0d0e21e | 5037 | default: |
b900a521 | 5038 | PerlIO_printf(Perl_error_log, "%"UVxf" %d\n", |
d7d93a81 | 5039 | PTR2UV(scan), OP(scan)); |
cea2e8a9 | 5040 | Perl_croak(aTHX_ "regexp memory corruption"); |
5d458dd8 YO |
5041 | |
5042 | } /* end switch */ | |
95b24440 | 5043 | |
5d458dd8 YO |
5044 | /* switch break jumps here */ |
5045 | scan = next; /* prepare to execute the next op and ... */ | |
5046 | continue; /* ... jump back to the top, reusing st */ | |
95b24440 DM |
5047 | /* NOTREACHED */ |
5048 | ||
40a82448 DM |
5049 | push_yes_state: |
5050 | /* push a state that backtracks on success */ | |
5051 | st->u.yes.prev_yes_state = yes_state; | |
5052 | yes_state = st; | |
5053 | /* FALL THROUGH */ | |
5054 | push_state: | |
5055 | /* push a new regex state, then continue at scan */ | |
5056 | { | |
5057 | regmatch_state *newst; | |
5058 | ||
24b23f37 YO |
5059 | DEBUG_STACK_r({ |
5060 | regmatch_state *cur = st; | |
5061 | regmatch_state *curyes = yes_state; | |
5062 | int curd = depth; | |
5063 | regmatch_slab *slab = PL_regmatch_slab; | |
5064 | for (;curd > -1;cur--,curd--) { | |
5065 | if (cur < SLAB_FIRST(slab)) { | |
5066 | slab = slab->prev; | |
5067 | cur = SLAB_LAST(slab); | |
5068 | } | |
5069 | PerlIO_printf(Perl_error_log, "%*s#%-3d %-10s %s\n", | |
5070 | REPORT_CODE_OFF + 2 + depth * 2,"", | |
13d6edb4 | 5071 | curd, PL_reg_name[cur->resume_state], |
24b23f37 YO |
5072 | (curyes == cur) ? "yes" : "" |
5073 | ); | |
5074 | if (curyes == cur) | |
5075 | curyes = cur->u.yes.prev_yes_state; | |
5076 | } | |
5077 | } else | |
5078 | DEBUG_STATE_pp("push") | |
5079 | ); | |
40a82448 | 5080 | depth++; |
40a82448 DM |
5081 | st->locinput = locinput; |
5082 | newst = st+1; | |
5083 | if (newst > SLAB_LAST(PL_regmatch_slab)) | |
5084 | newst = S_push_slab(aTHX); | |
5085 | PL_regmatch_state = newst; | |
786e8c11 | 5086 | |
40a82448 DM |
5087 | locinput = PL_reginput; |
5088 | nextchr = UCHARAT(locinput); | |
5089 | st = newst; | |
5090 | continue; | |
5091 | /* NOTREACHED */ | |
5092 | } | |
a0d0e21e | 5093 | } |
a687059c | 5094 | |
a0d0e21e LW |
5095 | /* |
5096 | * We get here only if there's trouble -- normally "case END" is | |
5097 | * the terminating point. | |
5098 | */ | |
cea2e8a9 | 5099 | Perl_croak(aTHX_ "corrupted regexp pointers"); |
a0d0e21e | 5100 | /*NOTREACHED*/ |
4633a7c4 LW |
5101 | sayNO; |
5102 | ||
262b90c4 | 5103 | yes: |
77cb431f DM |
5104 | if (yes_state) { |
5105 | /* we have successfully completed a subexpression, but we must now | |
5106 | * pop to the state marked by yes_state and continue from there */ | |
77cb431f | 5107 | assert(st != yes_state); |
5bc10b2c DM |
5108 | #ifdef DEBUGGING |
5109 | while (st != yes_state) { | |
5110 | st--; | |
5111 | if (st < SLAB_FIRST(PL_regmatch_slab)) { | |
5112 | PL_regmatch_slab = PL_regmatch_slab->prev; | |
5113 | st = SLAB_LAST(PL_regmatch_slab); | |
5114 | } | |
e2e6a0f1 | 5115 | DEBUG_STATE_r({ |
54612592 YO |
5116 | if (no_final) { |
5117 | DEBUG_STATE_pp("pop (no final)"); | |
5118 | } else { | |
5119 | DEBUG_STATE_pp("pop (yes)"); | |
5120 | } | |
e2e6a0f1 | 5121 | }); |
5bc10b2c DM |
5122 | depth--; |
5123 | } | |
5124 | #else | |
77cb431f DM |
5125 | while (yes_state < SLAB_FIRST(PL_regmatch_slab) |
5126 | || yes_state > SLAB_LAST(PL_regmatch_slab)) | |
5127 | { | |
5128 | /* not in this slab, pop slab */ | |
5129 | depth -= (st - SLAB_FIRST(PL_regmatch_slab) + 1); | |
5130 | PL_regmatch_slab = PL_regmatch_slab->prev; | |
5131 | st = SLAB_LAST(PL_regmatch_slab); | |
5132 | } | |
5133 | depth -= (st - yes_state); | |
5bc10b2c | 5134 | #endif |
77cb431f DM |
5135 | st = yes_state; |
5136 | yes_state = st->u.yes.prev_yes_state; | |
5137 | PL_regmatch_state = st; | |
24b23f37 | 5138 | |
5d458dd8 YO |
5139 | if (no_final) { |
5140 | locinput= st->locinput; | |
5141 | nextchr = UCHARAT(locinput); | |
5142 | } | |
54612592 | 5143 | state_num = st->resume_state + no_final; |
24d3c4a9 | 5144 | goto reenter_switch; |
77cb431f DM |
5145 | } |
5146 | ||
a3621e74 | 5147 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n", |
e4584336 | 5148 | PL_colors[4], PL_colors[5])); |
02db2b7b | 5149 | |
19b95bf0 DM |
5150 | if (PL_reg_eval_set) { |
5151 | /* each successfully executed (?{...}) block does the equivalent of | |
5152 | * local $^R = do {...} | |
5153 | * When popping the save stack, all these locals would be undone; | |
5154 | * bypass this by setting the outermost saved $^R to the latest | |
5155 | * value */ | |
5156 | if (oreplsv != GvSV(PL_replgv)) | |
5157 | sv_setsv(oreplsv, GvSV(PL_replgv)); | |
5158 | } | |
95b24440 | 5159 | result = 1; |
aa283a38 | 5160 | goto final_exit; |
4633a7c4 LW |
5161 | |
5162 | no: | |
a3621e74 | 5163 | DEBUG_EXECUTE_r( |
7821416a | 5164 | PerlIO_printf(Perl_debug_log, |
786e8c11 | 5165 | "%*s %sfailed...%s\n", |
5bc10b2c | 5166 | REPORT_CODE_OFF+depth*2, "", |
786e8c11 | 5167 | PL_colors[4], PL_colors[5]) |
7821416a | 5168 | ); |
aa283a38 | 5169 | |
262b90c4 | 5170 | no_silent: |
54612592 YO |
5171 | if (no_final) { |
5172 | if (yes_state) { | |
5173 | goto yes; | |
5174 | } else { | |
5175 | goto final_exit; | |
5176 | } | |
5177 | } | |
aa283a38 DM |
5178 | if (depth) { |
5179 | /* there's a previous state to backtrack to */ | |
40a82448 DM |
5180 | st--; |
5181 | if (st < SLAB_FIRST(PL_regmatch_slab)) { | |
5182 | PL_regmatch_slab = PL_regmatch_slab->prev; | |
5183 | st = SLAB_LAST(PL_regmatch_slab); | |
5184 | } | |
5185 | PL_regmatch_state = st; | |
40a82448 DM |
5186 | locinput= st->locinput; |
5187 | nextchr = UCHARAT(locinput); | |
5188 | ||
5bc10b2c DM |
5189 | DEBUG_STATE_pp("pop"); |
5190 | depth--; | |
262b90c4 DM |
5191 | if (yes_state == st) |
5192 | yes_state = st->u.yes.prev_yes_state; | |
5bc10b2c | 5193 | |
24d3c4a9 DM |
5194 | state_num = st->resume_state + 1; /* failure = success + 1 */ |
5195 | goto reenter_switch; | |
95b24440 | 5196 | } |
24d3c4a9 | 5197 | result = 0; |
aa283a38 | 5198 | |
262b90c4 | 5199 | final_exit: |
bbe252da | 5200 | if (rex->intflags & PREGf_VERBARG_SEEN) { |
5d458dd8 YO |
5201 | SV *sv_err = get_sv("REGERROR", 1); |
5202 | SV *sv_mrk = get_sv("REGMARK", 1); | |
5203 | if (result) { | |
e2e6a0f1 | 5204 | sv_commit = &PL_sv_no; |
5d458dd8 YO |
5205 | if (!sv_yes_mark) |
5206 | sv_yes_mark = &PL_sv_yes; | |
5207 | } else { | |
5208 | if (!sv_commit) | |
5209 | sv_commit = &PL_sv_yes; | |
5210 | sv_yes_mark = &PL_sv_no; | |
5211 | } | |
5212 | sv_setsv(sv_err, sv_commit); | |
5213 | sv_setsv(sv_mrk, sv_yes_mark); | |
e2e6a0f1 | 5214 | } |
19b95bf0 | 5215 | |
2f554ef7 DM |
5216 | /* clean up; in particular, free all slabs above current one */ |
5217 | LEAVE_SCOPE(oldsave); | |
5d9a96ca | 5218 | |
95b24440 | 5219 | return result; |
a687059c LW |
5220 | } |
5221 | ||
5222 | /* | |
5223 | - regrepeat - repeatedly match something simple, report how many | |
5224 | */ | |
5225 | /* | |
5226 | * [This routine now assumes that it will only match on things of length 1. | |
5227 | * That was true before, but now we assume scan - reginput is the count, | |
a0ed51b3 | 5228 | * rather than incrementing count on every character. [Er, except utf8.]] |
a687059c | 5229 | */ |
76e3520e | 5230 | STATIC I32 |
e2e6a0f1 | 5231 | S_regrepeat(pTHX_ const regexp *prog, const regnode *p, I32 max, int depth) |
a687059c | 5232 | { |
27da23d5 | 5233 | dVAR; |
a0d0e21e | 5234 | register char *scan; |
a0d0e21e | 5235 | register I32 c; |
3280af22 | 5236 | register char *loceol = PL_regeol; |
a0ed51b3 | 5237 | register I32 hardcount = 0; |
53c4c00c | 5238 | register bool do_utf8 = PL_reg_match_utf8; |
4f55667c SP |
5239 | #ifndef DEBUGGING |
5240 | PERL_UNUSED_ARG(depth); | |
5241 | #endif | |
a0d0e21e | 5242 | |
3280af22 | 5243 | scan = PL_reginput; |
faf11cac HS |
5244 | if (max == REG_INFTY) |
5245 | max = I32_MAX; | |
5246 | else if (max < loceol - scan) | |
7f596f4c | 5247 | loceol = scan + max; |
a0d0e21e | 5248 | switch (OP(p)) { |
22c35a8c | 5249 | case REG_ANY: |
1aa99e6b | 5250 | if (do_utf8) { |
ffc61ed2 | 5251 | loceol = PL_regeol; |
1aa99e6b | 5252 | while (scan < loceol && hardcount < max && *scan != '\n') { |
ffc61ed2 JH |
5253 | scan += UTF8SKIP(scan); |
5254 | hardcount++; | |
5255 | } | |
5256 | } else { | |
5257 | while (scan < loceol && *scan != '\n') | |
5258 | scan++; | |
a0ed51b3 LW |
5259 | } |
5260 | break; | |
ffc61ed2 | 5261 | case SANY: |
def8e4ea JH |
5262 | if (do_utf8) { |
5263 | loceol = PL_regeol; | |
a0804c9e | 5264 | while (scan < loceol && hardcount < max) { |
def8e4ea JH |
5265 | scan += UTF8SKIP(scan); |
5266 | hardcount++; | |
5267 | } | |
5268 | } | |
5269 | else | |
5270 | scan = loceol; | |
a0ed51b3 | 5271 | break; |
f33976b4 DB |
5272 | case CANY: |
5273 | scan = loceol; | |
5274 | break; | |
090f7165 JH |
5275 | case EXACT: /* length of string is 1 */ |
5276 | c = (U8)*STRING(p); | |
5277 | while (scan < loceol && UCHARAT(scan) == c) | |
5278 | scan++; | |
bbce6d69 | 5279 | break; |
5280 | case EXACTF: /* length of string is 1 */ | |
cd439c50 | 5281 | c = (U8)*STRING(p); |
bbce6d69 | 5282 | while (scan < loceol && |
22c35a8c | 5283 | (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c])) |
bbce6d69 | 5284 | scan++; |
5285 | break; | |
5286 | case EXACTFL: /* length of string is 1 */ | |
3280af22 | 5287 | PL_reg_flags |= RF_tainted; |
cd439c50 | 5288 | c = (U8)*STRING(p); |
bbce6d69 | 5289 | while (scan < loceol && |
22c35a8c | 5290 | (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c])) |
a0d0e21e LW |
5291 | scan++; |
5292 | break; | |
5293 | case ANYOF: | |
ffc61ed2 JH |
5294 | if (do_utf8) { |
5295 | loceol = PL_regeol; | |
cfc92286 | 5296 | while (hardcount < max && scan < loceol && |
32fc9b6a | 5297 | reginclass(prog, p, (U8*)scan, 0, do_utf8)) { |
ffc61ed2 JH |
5298 | scan += UTF8SKIP(scan); |
5299 | hardcount++; | |
5300 | } | |
5301 | } else { | |
32fc9b6a | 5302 | while (scan < loceol && REGINCLASS(prog, p, (U8*)scan)) |
ffc61ed2 JH |
5303 | scan++; |
5304 | } | |
a0d0e21e LW |
5305 | break; |
5306 | case ALNUM: | |
1aa99e6b | 5307 | if (do_utf8) { |
ffc61ed2 | 5308 | loceol = PL_regeol; |
1a4fad37 | 5309 | LOAD_UTF8_CHARCLASS_ALNUM(); |
1aa99e6b | 5310 | while (hardcount < max && scan < loceol && |
3568d838 | 5311 | swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) { |
ffc61ed2 JH |
5312 | scan += UTF8SKIP(scan); |
5313 | hardcount++; | |
5314 | } | |
5315 | } else { | |
5316 | while (scan < loceol && isALNUM(*scan)) | |
5317 | scan++; | |
a0ed51b3 LW |
5318 | } |
5319 | break; | |
bbce6d69 | 5320 | case ALNUML: |
3280af22 | 5321 | PL_reg_flags |= RF_tainted; |
1aa99e6b | 5322 | if (do_utf8) { |
ffc61ed2 | 5323 | loceol = PL_regeol; |
1aa99e6b IH |
5324 | while (hardcount < max && scan < loceol && |
5325 | isALNUM_LC_utf8((U8*)scan)) { | |
ffc61ed2 JH |
5326 | scan += UTF8SKIP(scan); |
5327 | hardcount++; | |
5328 | } | |
5329 | } else { | |
5330 | while (scan < loceol && isALNUM_LC(*scan)) | |
5331 | scan++; | |
a0ed51b3 LW |
5332 | } |
5333 | break; | |
a0d0e21e | 5334 | case NALNUM: |
1aa99e6b | 5335 | if (do_utf8) { |
ffc61ed2 | 5336 | loceol = PL_regeol; |
1a4fad37 | 5337 | LOAD_UTF8_CHARCLASS_ALNUM(); |
1aa99e6b | 5338 | while (hardcount < max && scan < loceol && |
3568d838 | 5339 | !swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) { |
ffc61ed2 JH |
5340 | scan += UTF8SKIP(scan); |
5341 | hardcount++; | |
5342 | } | |
5343 | } else { | |
5344 | while (scan < loceol && !isALNUM(*scan)) | |
5345 | scan++; | |
a0ed51b3 LW |
5346 | } |
5347 | break; | |
bbce6d69 | 5348 | case NALNUML: |
3280af22 | 5349 | PL_reg_flags |= RF_tainted; |
1aa99e6b | 5350 | if (do_utf8) { |
ffc61ed2 | 5351 | loceol = PL_regeol; |
1aa99e6b IH |
5352 | while (hardcount < max && scan < loceol && |
5353 | !isALNUM_LC_utf8((U8*)scan)) { | |
ffc61ed2 JH |
5354 | scan += UTF8SKIP(scan); |
5355 | hardcount++; | |
5356 | } | |
5357 | } else { | |
5358 | while (scan < loceol && !isALNUM_LC(*scan)) | |
5359 | scan++; | |
a0ed51b3 LW |
5360 | } |
5361 | break; | |
a0d0e21e | 5362 | case SPACE: |
1aa99e6b | 5363 | if (do_utf8) { |
ffc61ed2 | 5364 | loceol = PL_regeol; |
1a4fad37 | 5365 | LOAD_UTF8_CHARCLASS_SPACE(); |
1aa99e6b | 5366 | while (hardcount < max && scan < loceol && |
3568d838 JH |
5367 | (*scan == ' ' || |
5368 | swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) { | |
ffc61ed2 JH |
5369 | scan += UTF8SKIP(scan); |
5370 | hardcount++; | |
5371 | } | |
5372 | } else { | |
5373 | while (scan < loceol && isSPACE(*scan)) | |
5374 | scan++; | |
a0ed51b3 LW |
5375 | } |
5376 | break; | |
bbce6d69 | 5377 | case SPACEL: |
3280af22 | 5378 | PL_reg_flags |= RF_tainted; |
1aa99e6b | 5379 | if (do_utf8) { |
ffc61ed2 | 5380 | loceol = PL_regeol; |
1aa99e6b | 5381 | while (hardcount < max && scan < loceol && |
ffc61ed2 JH |
5382 | (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
5383 | scan += UTF8SKIP(scan); | |
5384 | hardcount++; | |
5385 | } | |
5386 | } else { | |
5387 | while (scan < loceol && isSPACE_LC(*scan)) | |
5388 | scan++; | |
a0ed51b3 LW |
5389 | } |
5390 | break; | |
a0d0e21e | 5391 | case NSPACE: |
1aa99e6b | 5392 | if (do_utf8) { |
ffc61ed2 | 5393 | loceol = PL_regeol; |
1a4fad37 | 5394 | LOAD_UTF8_CHARCLASS_SPACE(); |
1aa99e6b | 5395 | while (hardcount < max && scan < loceol && |
3568d838 JH |
5396 | !(*scan == ' ' || |
5397 | swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) { | |
ffc61ed2 JH |
5398 | scan += UTF8SKIP(scan); |
5399 | hardcount++; | |
5400 | } | |
5401 | } else { | |
5402 | while (scan < loceol && !isSPACE(*scan)) | |
5403 | scan++; | |
5404 | break; | |
a0ed51b3 | 5405 | } |
bbce6d69 | 5406 | case NSPACEL: |
3280af22 | 5407 | PL_reg_flags |= RF_tainted; |
1aa99e6b | 5408 | if (do_utf8) { |
ffc61ed2 | 5409 | loceol = PL_regeol; |
1aa99e6b | 5410 | while (hardcount < max && scan < loceol && |
ffc61ed2 JH |
5411 | !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
5412 | scan += UTF8SKIP(scan); | |
5413 | hardcount++; | |
5414 | } | |
5415 | } else { | |
5416 | while (scan < loceol && !isSPACE_LC(*scan)) | |
5417 | scan++; | |
a0ed51b3 LW |
5418 | } |
5419 | break; | |
a0d0e21e | 5420 | case DIGIT: |
1aa99e6b | 5421 | if (do_utf8) { |
ffc61ed2 | 5422 | loceol = PL_regeol; |
1a4fad37 | 5423 | LOAD_UTF8_CHARCLASS_DIGIT(); |
1aa99e6b | 5424 | while (hardcount < max && scan < loceol && |
3568d838 | 5425 | swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) { |
ffc61ed2 JH |
5426 | scan += UTF8SKIP(scan); |
5427 | hardcount++; | |
5428 | } | |
5429 | } else { | |
5430 | while (scan < loceol && isDIGIT(*scan)) | |
5431 | scan++; | |
a0ed51b3 LW |
5432 | } |
5433 | break; | |
a0d0e21e | 5434 | case NDIGIT: |
1aa99e6b | 5435 | if (do_utf8) { |
ffc61ed2 | 5436 | loceol = PL_regeol; |
1a4fad37 | 5437 | LOAD_UTF8_CHARCLASS_DIGIT(); |
1aa99e6b | 5438 | while (hardcount < max && scan < loceol && |
3568d838 | 5439 | !swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) { |
ffc61ed2 JH |
5440 | scan += UTF8SKIP(scan); |
5441 | hardcount++; | |
5442 | } | |
5443 | } else { | |
5444 | while (scan < loceol && !isDIGIT(*scan)) | |
5445 | scan++; | |
a0ed51b3 | 5446 | } |
e1d1eefb YO |
5447 | case LNBREAK: |
5448 | if (do_utf8) { | |
5449 | loceol = PL_regeol; | |
5450 | while (hardcount < max && scan < loceol && (c=is_LNBREAK_utf8(scan))) { | |
5451 | scan += c; | |
5452 | hardcount++; | |
5453 | } | |
5454 | } else { | |
5455 | /* | |
5456 | LNBREAK can match two latin chars, which is ok, | |
5457 | because we have a null terminated string, but we | |
5458 | have to use hardcount in this situation | |
5459 | */ | |
5460 | while (scan < loceol && (c=is_LNBREAK_latin1(scan))) { | |
5461 | scan+=c; | |
5462 | hardcount++; | |
5463 | } | |
5464 | } | |
5465 | break; | |
5466 | case HORIZWS: | |
5467 | if (do_utf8) { | |
5468 | loceol = PL_regeol; | |
5469 | while (hardcount < max && scan < loceol && (c=is_HORIZWS_utf8(scan))) { | |
5470 | scan += c; | |
5471 | hardcount++; | |
5472 | } | |
5473 | } else { | |
5474 | while (scan < loceol && is_HORIZWS_latin1(scan)) | |
5475 | scan++; | |
5476 | } | |
a0ed51b3 | 5477 | break; |
e1d1eefb YO |
5478 | case NHORIZWS: |
5479 | if (do_utf8) { | |
5480 | loceol = PL_regeol; | |
5481 | while (hardcount < max && scan < loceol && !is_HORIZWS_utf8(scan)) { | |
5482 | scan += UTF8SKIP(scan); | |
5483 | hardcount++; | |
5484 | } | |
5485 | } else { | |
5486 | while (scan < loceol && !is_HORIZWS_latin1(scan)) | |
5487 | scan++; | |
5488 | ||
5489 | } | |
5490 | break; | |
5491 | case VERTWS: | |
5492 | if (do_utf8) { | |
5493 | loceol = PL_regeol; | |
5494 | while (hardcount < max && scan < loceol && (c=is_VERTWS_utf8(scan))) { | |
5495 | scan += c; | |
5496 | hardcount++; | |
5497 | } | |
5498 | } else { | |
5499 | while (scan < loceol && is_VERTWS_latin1(scan)) | |
5500 | scan++; | |
5501 | ||
5502 | } | |
5503 | break; | |
5504 | case NVERTWS: | |
5505 | if (do_utf8) { | |
5506 | loceol = PL_regeol; | |
5507 | while (hardcount < max && scan < loceol && !is_VERTWS_utf8(scan)) { | |
5508 | scan += UTF8SKIP(scan); | |
5509 | hardcount++; | |
5510 | } | |
5511 | } else { | |
5512 | while (scan < loceol && !is_VERTWS_latin1(scan)) | |
5513 | scan++; | |
5514 | ||
5515 | } | |
5516 | break; | |
5517 | ||
a0d0e21e LW |
5518 | default: /* Called on something of 0 width. */ |
5519 | break; /* So match right here or not at all. */ | |
5520 | } | |
a687059c | 5521 | |
a0ed51b3 LW |
5522 | if (hardcount) |
5523 | c = hardcount; | |
5524 | else | |
5525 | c = scan - PL_reginput; | |
3280af22 | 5526 | PL_reginput = scan; |
a687059c | 5527 | |
a3621e74 | 5528 | DEBUG_r({ |
e68ec53f | 5529 | GET_RE_DEBUG_FLAGS_DECL; |
be8e71aa | 5530 | DEBUG_EXECUTE_r({ |
e68ec53f YO |
5531 | SV * const prop = sv_newmortal(); |
5532 | regprop(prog, prop, p); | |
5533 | PerlIO_printf(Perl_debug_log, | |
be8e71aa | 5534 | "%*s %s can match %"IVdf" times out of %"IVdf"...\n", |
e2e6a0f1 | 5535 | REPORT_CODE_OFF + depth*2, "", SvPVX_const(prop),(IV)c,(IV)max); |
a3621e74 | 5536 | }); |
be8e71aa | 5537 | }); |
9041c2e3 | 5538 | |
a0d0e21e | 5539 | return(c); |
a687059c LW |
5540 | } |
5541 | ||
c277df42 | 5542 | |
be8e71aa | 5543 | #if !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION) |
c277df42 | 5544 | /* |
ffc61ed2 JH |
5545 | - regclass_swash - prepare the utf8 swash |
5546 | */ | |
5547 | ||
5548 | SV * | |
32fc9b6a | 5549 | Perl_regclass_swash(pTHX_ const regexp *prog, register const regnode* node, bool doinit, SV** listsvp, SV **altsvp) |
ffc61ed2 | 5550 | { |
97aff369 | 5551 | dVAR; |
9e55ce06 JH |
5552 | SV *sw = NULL; |
5553 | SV *si = NULL; | |
5554 | SV *alt = NULL; | |
f8fc2ecf YO |
5555 | RXi_GET_DECL(prog,progi); |
5556 | const struct reg_data * const data = prog ? progi->data : NULL; | |
ffc61ed2 | 5557 | |
4f639d21 | 5558 | if (data && data->count) { |
a3b680e6 | 5559 | const U32 n = ARG(node); |
ffc61ed2 | 5560 | |
4f639d21 DM |
5561 | if (data->what[n] == 's') { |
5562 | SV * const rv = (SV*)data->data[n]; | |
890ce7af | 5563 | AV * const av = (AV*)SvRV((SV*)rv); |
2d03de9c | 5564 | SV **const ary = AvARRAY(av); |
9e55ce06 | 5565 | SV **a, **b; |
9041c2e3 | 5566 | |
711a919c | 5567 | /* See the end of regcomp.c:S_regclass() for |
9e55ce06 JH |
5568 | * documentation of these array elements. */ |
5569 | ||
b11f357e | 5570 | si = *ary; |
8f7f7219 | 5571 | a = SvROK(ary[1]) ? &ary[1] : 0; |
b11f357e JH |
5572 | b = SvTYPE(ary[2]) == SVt_PVAV ? &ary[2] : 0; |
5573 | ||
ffc61ed2 JH |
5574 | if (a) |
5575 | sw = *a; | |
5576 | else if (si && doinit) { | |
5577 | sw = swash_init("utf8", "", si, 1, 0); | |
5578 | (void)av_store(av, 1, sw); | |
5579 | } | |
9e55ce06 JH |
5580 | if (b) |
5581 | alt = *b; | |
ffc61ed2 JH |
5582 | } |
5583 | } | |
5584 | ||
9e55ce06 JH |
5585 | if (listsvp) |
5586 | *listsvp = si; | |
5587 | if (altsvp) | |
5588 | *altsvp = alt; | |
ffc61ed2 JH |
5589 | |
5590 | return sw; | |
5591 | } | |
76234dfb | 5592 | #endif |
ffc61ed2 JH |
5593 | |
5594 | /* | |
ba7b4546 | 5595 | - reginclass - determine if a character falls into a character class |
832705d4 JH |
5596 | |
5597 | The n is the ANYOF regnode, the p is the target string, lenp | |
5598 | is pointer to the maximum length of how far to go in the p | |
5599 | (if the lenp is zero, UTF8SKIP(p) is used), | |
5600 | do_utf8 tells whether the target string is in UTF-8. | |
5601 | ||
bbce6d69 | 5602 | */ |
5603 | ||
76e3520e | 5604 | STATIC bool |
32fc9b6a | 5605 | S_reginclass(pTHX_ const regexp *prog, register const regnode *n, register const U8* p, STRLEN* lenp, register bool do_utf8) |
bbce6d69 | 5606 | { |
27da23d5 | 5607 | dVAR; |
a3b680e6 | 5608 | const char flags = ANYOF_FLAGS(n); |
bbce6d69 | 5609 | bool match = FALSE; |
cc07378b | 5610 | UV c = *p; |
ae9ddab8 | 5611 | STRLEN len = 0; |
9e55ce06 | 5612 | STRLEN plen; |
1aa99e6b | 5613 | |
19f67299 TS |
5614 | if (do_utf8 && !UTF8_IS_INVARIANT(c)) { |
5615 | c = utf8n_to_uvchr(p, UTF8_MAXBYTES, &len, | |
4ad0818d DM |
5616 | (UTF8_ALLOW_DEFAULT & UTF8_ALLOW_ANYUV) | UTF8_CHECK_ONLY); |
5617 | /* see [perl #37836] for UTF8_ALLOW_ANYUV */ | |
e8a70c6f SP |
5618 | if (len == (STRLEN)-1) |
5619 | Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)"); | |
19f67299 | 5620 | } |
bbce6d69 | 5621 | |
0f0076b4 | 5622 | plen = lenp ? *lenp : UNISKIP(NATIVE_TO_UNI(c)); |
ffc61ed2 | 5623 | if (do_utf8 || (flags & ANYOF_UNICODE)) { |
9e55ce06 JH |
5624 | if (lenp) |
5625 | *lenp = 0; | |
ffc61ed2 | 5626 | if (do_utf8 && !ANYOF_RUNTIME(n)) { |
ffc61ed2 JH |
5627 | if (len != (STRLEN)-1 && c < 256 && ANYOF_BITMAP_TEST(n, c)) |
5628 | match = TRUE; | |
bbce6d69 | 5629 | } |
3568d838 | 5630 | if (!match && do_utf8 && (flags & ANYOF_UNICODE_ALL) && c >= 256) |
1aa99e6b | 5631 | match = TRUE; |
ffc61ed2 | 5632 | if (!match) { |
9e55ce06 | 5633 | AV *av; |
32fc9b6a | 5634 | SV * const sw = regclass_swash(prog, n, TRUE, 0, (SV**)&av); |
ffc61ed2 JH |
5635 | |
5636 | if (sw) { | |
3568d838 | 5637 | if (swash_fetch(sw, p, do_utf8)) |
ffc61ed2 JH |
5638 | match = TRUE; |
5639 | else if (flags & ANYOF_FOLD) { | |
9e55ce06 JH |
5640 | if (!match && lenp && av) { |
5641 | I32 i; | |
9e55ce06 | 5642 | for (i = 0; i <= av_len(av); i++) { |
890ce7af | 5643 | SV* const sv = *av_fetch(av, i, FALSE); |
9e55ce06 | 5644 | STRLEN len; |
890ce7af | 5645 | const char * const s = SvPV_const(sv, len); |
9e55ce06 | 5646 | |
061b10df | 5647 | if (len <= plen && memEQ(s, (char*)p, len)) { |
9e55ce06 JH |
5648 | *lenp = len; |
5649 | match = TRUE; | |
5650 | break; | |
5651 | } | |
5652 | } | |
5653 | } | |
5654 | if (!match) { | |
89ebb4a3 | 5655 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1]; |
4a623e43 JH |
5656 | STRLEN tmplen; |
5657 | ||
9e55ce06 JH |
5658 | to_utf8_fold(p, tmpbuf, &tmplen); |
5659 | if (swash_fetch(sw, tmpbuf, do_utf8)) | |
5660 | match = TRUE; | |
5661 | } | |
ffc61ed2 JH |
5662 | } |
5663 | } | |
bbce6d69 | 5664 | } |
9e55ce06 | 5665 | if (match && lenp && *lenp == 0) |
0f0076b4 | 5666 | *lenp = UNISKIP(NATIVE_TO_UNI(c)); |
bbce6d69 | 5667 | } |
1aa99e6b | 5668 | if (!match && c < 256) { |
ffc61ed2 JH |
5669 | if (ANYOF_BITMAP_TEST(n, c)) |
5670 | match = TRUE; | |
5671 | else if (flags & ANYOF_FOLD) { | |
eb160463 | 5672 | U8 f; |
a0ed51b3 | 5673 | |
ffc61ed2 JH |
5674 | if (flags & ANYOF_LOCALE) { |
5675 | PL_reg_flags |= RF_tainted; | |
5676 | f = PL_fold_locale[c]; | |
5677 | } | |
5678 | else | |
5679 | f = PL_fold[c]; | |
5680 | if (f != c && ANYOF_BITMAP_TEST(n, f)) | |
5681 | match = TRUE; | |
5682 | } | |
5683 | ||
5684 | if (!match && (flags & ANYOF_CLASS)) { | |
a0ed51b3 | 5685 | PL_reg_flags |= RF_tainted; |
ffc61ed2 JH |
5686 | if ( |
5687 | (ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) || | |
5688 | (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) || | |
5689 | (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) || | |
5690 | (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) || | |
5691 | (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) || | |
5692 | (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) || | |
5693 | (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) || | |
5694 | (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) || | |
5695 | (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) || | |
5696 | (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) || | |
5697 | (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII(c)) || | |
5698 | (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII(c)) || | |
5699 | (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) || | |
5700 | (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) || | |
5701 | (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) || | |
5702 | (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) || | |
5703 | (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) || | |
5704 | (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) || | |
5705 | (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) || | |
5706 | (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) || | |
5707 | (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) || | |
5708 | (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) || | |
5709 | (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) || | |
5710 | (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) || | |
5711 | (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) || | |
5712 | (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) || | |
5713 | (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) || | |
5714 | (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) || | |
5715 | (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK(c)) || | |
5716 | (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK(c)) | |
5717 | ) /* How's that for a conditional? */ | |
5718 | { | |
5719 | match = TRUE; | |
5720 | } | |
a0ed51b3 | 5721 | } |
a0ed51b3 LW |
5722 | } |
5723 | ||
a0ed51b3 LW |
5724 | return (flags & ANYOF_INVERT) ? !match : match; |
5725 | } | |
161b471a | 5726 | |
dfe13c55 | 5727 | STATIC U8 * |
0ce71af7 | 5728 | S_reghop3(U8 *s, I32 off, const U8* lim) |
9041c2e3 | 5729 | { |
97aff369 | 5730 | dVAR; |
a0ed51b3 | 5731 | if (off >= 0) { |
1aa99e6b | 5732 | while (off-- && s < lim) { |
ffc61ed2 | 5733 | /* XXX could check well-formedness here */ |
a0ed51b3 | 5734 | s += UTF8SKIP(s); |
ffc61ed2 | 5735 | } |
a0ed51b3 LW |
5736 | } |
5737 | else { | |
1de06328 YO |
5738 | while (off++ && s > lim) { |
5739 | s--; | |
5740 | if (UTF8_IS_CONTINUED(*s)) { | |
5741 | while (s > lim && UTF8_IS_CONTINUATION(*s)) | |
5742 | s--; | |
a0ed51b3 | 5743 | } |
1de06328 | 5744 | /* XXX could check well-formedness here */ |
a0ed51b3 LW |
5745 | } |
5746 | } | |
5747 | return s; | |
5748 | } | |
161b471a | 5749 | |
f9f4320a YO |
5750 | #ifdef XXX_dmq |
5751 | /* there are a bunch of places where we use two reghop3's that should | |
5752 | be replaced with this routine. but since thats not done yet | |
5753 | we ifdef it out - dmq | |
5754 | */ | |
dfe13c55 | 5755 | STATIC U8 * |
1de06328 YO |
5756 | S_reghop4(U8 *s, I32 off, const U8* llim, const U8* rlim) |
5757 | { | |
5758 | dVAR; | |
5759 | if (off >= 0) { | |
5760 | while (off-- && s < rlim) { | |
5761 | /* XXX could check well-formedness here */ | |
5762 | s += UTF8SKIP(s); | |
5763 | } | |
5764 | } | |
5765 | else { | |
5766 | while (off++ && s > llim) { | |
5767 | s--; | |
5768 | if (UTF8_IS_CONTINUED(*s)) { | |
5769 | while (s > llim && UTF8_IS_CONTINUATION(*s)) | |
5770 | s--; | |
5771 | } | |
5772 | /* XXX could check well-formedness here */ | |
5773 | } | |
5774 | } | |
5775 | return s; | |
5776 | } | |
f9f4320a | 5777 | #endif |
1de06328 YO |
5778 | |
5779 | STATIC U8 * | |
0ce71af7 | 5780 | S_reghopmaybe3(U8* s, I32 off, const U8* lim) |
a0ed51b3 | 5781 | { |
97aff369 | 5782 | dVAR; |
a0ed51b3 | 5783 | if (off >= 0) { |
1aa99e6b | 5784 | while (off-- && s < lim) { |
ffc61ed2 | 5785 | /* XXX could check well-formedness here */ |
a0ed51b3 | 5786 | s += UTF8SKIP(s); |
ffc61ed2 | 5787 | } |
a0ed51b3 | 5788 | if (off >= 0) |
3dab1dad | 5789 | return NULL; |
a0ed51b3 LW |
5790 | } |
5791 | else { | |
1de06328 YO |
5792 | while (off++ && s > lim) { |
5793 | s--; | |
5794 | if (UTF8_IS_CONTINUED(*s)) { | |
5795 | while (s > lim && UTF8_IS_CONTINUATION(*s)) | |
5796 | s--; | |
a0ed51b3 | 5797 | } |
1de06328 | 5798 | /* XXX could check well-formedness here */ |
a0ed51b3 LW |
5799 | } |
5800 | if (off <= 0) | |
3dab1dad | 5801 | return NULL; |
a0ed51b3 LW |
5802 | } |
5803 | return s; | |
5804 | } | |
51371543 | 5805 | |
51371543 | 5806 | static void |
acfe0abc | 5807 | restore_pos(pTHX_ void *arg) |
51371543 | 5808 | { |
97aff369 | 5809 | dVAR; |
097eb12c | 5810 | regexp * const rex = (regexp *)arg; |
51371543 GS |
5811 | if (PL_reg_eval_set) { |
5812 | if (PL_reg_oldsaved) { | |
4f639d21 DM |
5813 | rex->subbeg = PL_reg_oldsaved; |
5814 | rex->sublen = PL_reg_oldsavedlen; | |
f8c7b90f | 5815 | #ifdef PERL_OLD_COPY_ON_WRITE |
4f639d21 | 5816 | rex->saved_copy = PL_nrs; |
ed252734 | 5817 | #endif |
4f639d21 | 5818 | RX_MATCH_COPIED_on(rex); |
51371543 GS |
5819 | } |
5820 | PL_reg_magic->mg_len = PL_reg_oldpos; | |
5821 | PL_reg_eval_set = 0; | |
5822 | PL_curpm = PL_reg_oldcurpm; | |
5823 | } | |
5824 | } | |
33b8afdf JH |
5825 | |
5826 | STATIC void | |
5827 | S_to_utf8_substr(pTHX_ register regexp *prog) | |
5828 | { | |
a1cac82e NC |
5829 | int i = 1; |
5830 | do { | |
5831 | if (prog->substrs->data[i].substr | |
5832 | && !prog->substrs->data[i].utf8_substr) { | |
5833 | SV* const sv = newSVsv(prog->substrs->data[i].substr); | |
5834 | prog->substrs->data[i].utf8_substr = sv; | |
5835 | sv_utf8_upgrade(sv); | |
610460f9 NC |
5836 | if (SvVALID(prog->substrs->data[i].substr)) { |
5837 | const U8 flags = BmFLAGS(prog->substrs->data[i].substr); | |
5838 | if (flags & FBMcf_TAIL) { | |
5839 | /* Trim the trailing \n that fbm_compile added last | |
5840 | time. */ | |
5841 | SvCUR_set(sv, SvCUR(sv) - 1); | |
5842 | /* Whilst this makes the SV technically "invalid" (as its | |
5843 | buffer is no longer followed by "\0") when fbm_compile() | |
5844 | adds the "\n" back, a "\0" is restored. */ | |
5845 | } | |
5846 | fbm_compile(sv, flags); | |
5847 | } | |
a1cac82e NC |
5848 | if (prog->substrs->data[i].substr == prog->check_substr) |
5849 | prog->check_utf8 = sv; | |
5850 | } | |
5851 | } while (i--); | |
33b8afdf JH |
5852 | } |
5853 | ||
5854 | STATIC void | |
5855 | S_to_byte_substr(pTHX_ register regexp *prog) | |
5856 | { | |
97aff369 | 5857 | dVAR; |
a1cac82e NC |
5858 | int i = 1; |
5859 | do { | |
5860 | if (prog->substrs->data[i].utf8_substr | |
5861 | && !prog->substrs->data[i].substr) { | |
5862 | SV* sv = newSVsv(prog->substrs->data[i].utf8_substr); | |
5863 | if (sv_utf8_downgrade(sv, TRUE)) { | |
610460f9 NC |
5864 | if (SvVALID(prog->substrs->data[i].utf8_substr)) { |
5865 | const U8 flags | |
5866 | = BmFLAGS(prog->substrs->data[i].utf8_substr); | |
5867 | if (flags & FBMcf_TAIL) { | |
5868 | /* Trim the trailing \n that fbm_compile added last | |
5869 | time. */ | |
5870 | SvCUR_set(sv, SvCUR(sv) - 1); | |
5871 | } | |
5872 | fbm_compile(sv, flags); | |
5873 | } | |
a1cac82e NC |
5874 | } else { |
5875 | SvREFCNT_dec(sv); | |
5876 | sv = &PL_sv_undef; | |
5877 | } | |
5878 | prog->substrs->data[i].substr = sv; | |
5879 | if (prog->substrs->data[i].utf8_substr == prog->check_utf8) | |
5880 | prog->check_substr = sv; | |
33b8afdf | 5881 | } |
a1cac82e | 5882 | } while (i--); |
33b8afdf | 5883 | } |
66610fdd RGS |
5884 | |
5885 | /* | |
5886 | * Local variables: | |
5887 | * c-indentation-style: bsd | |
5888 | * c-basic-offset: 4 | |
5889 | * indent-tabs-mode: t | |
5890 | * End: | |
5891 | * | |
37442d52 RGS |
5892 | * ex: set ts=8 sts=4 sw=4 noet: |
5893 | */ |