Commit | Line | Data |
---|---|---|
a0d0e21e LW |
1 | /* regexec.c |
2 | */ | |
3 | ||
4 | /* | |
4ac71550 TC |
5 | * One Ring to rule them all, One Ring to find them |
6 | & | |
7 | * [p.v of _The Lord of the Rings_, opening poem] | |
8 | * [p.50 of _The Lord of the Rings_, I/iii: "The Shadow of the Past"] | |
9 | * [p.254 of _The Lord of the Rings_, II/ii: "The Council of Elrond"] | |
a0d0e21e LW |
10 | */ |
11 | ||
61296642 DM |
12 | /* This file contains functions for executing a regular expression. See |
13 | * also regcomp.c which funnily enough, contains functions for compiling | |
166f8a29 | 14 | * a regular expression. |
e4a054ea DM |
15 | * |
16 | * This file is also copied at build time to ext/re/re_exec.c, where | |
17 | * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT. | |
18 | * This causes the main functions to be compiled under new names and with | |
19 | * debugging support added, which makes "use re 'debug'" work. | |
166f8a29 DM |
20 | */ |
21 | ||
a687059c LW |
22 | /* NOTE: this is derived from Henry Spencer's regexp code, and should not |
23 | * confused with the original package (see point 3 below). Thanks, Henry! | |
24 | */ | |
25 | ||
26 | /* Additional note: this code is very heavily munged from Henry's version | |
27 | * in places. In some spots I've traded clarity for efficiency, so don't | |
28 | * blame Henry for some of the lack of readability. | |
29 | */ | |
30 | ||
e50aee73 AD |
31 | /* The names of the functions have been changed from regcomp and |
32 | * regexec to pregcomp and pregexec in order to avoid conflicts | |
33 | * with the POSIX routines of the same names. | |
34 | */ | |
35 | ||
b9d5759e | 36 | #ifdef PERL_EXT_RE_BUILD |
54df2634 | 37 | #include "re_top.h" |
9041c2e3 | 38 | #endif |
56953603 | 39 | |
7e0d5ad7 KW |
40 | /* At least one required character in the target string is expressible only in |
41 | * UTF-8. */ | |
991fc03a | 42 | static const char* const non_utf8_target_but_utf8_required |
7e0d5ad7 KW |
43 | = "Can't match, because target string needs to be in UTF-8\n"; |
44 | ||
6b54ddc5 YO |
45 | #define NON_UTF8_TARGET_BUT_UTF8_REQUIRED(target) STMT_START { \ |
46 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%s", non_utf8_target_but_utf8_required));\ | |
47 | goto target; \ | |
48 | } STMT_END | |
49 | ||
a687059c | 50 | /* |
e50aee73 | 51 | * pregcomp and pregexec -- regsub and regerror are not used in perl |
a687059c LW |
52 | * |
53 | * Copyright (c) 1986 by University of Toronto. | |
54 | * Written by Henry Spencer. Not derived from licensed software. | |
55 | * | |
56 | * Permission is granted to anyone to use this software for any | |
57 | * purpose on any computer system, and to redistribute it freely, | |
58 | * subject to the following restrictions: | |
59 | * | |
60 | * 1. The author is not responsible for the consequences of use of | |
61 | * this software, no matter how awful, even if they arise | |
62 | * from defects in it. | |
63 | * | |
64 | * 2. The origin of this software must not be misrepresented, either | |
65 | * by explicit claim or by omission. | |
66 | * | |
67 | * 3. Altered versions must be plainly marked as such, and must not | |
68 | * be misrepresented as being the original software. | |
69 | * | |
70 | **** Alterations to Henry's code are... | |
71 | **** | |
4bb101f2 | 72 | **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
1129b882 NC |
73 | **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
74 | **** by Larry Wall and others | |
a687059c | 75 | **** |
9ef589d8 LW |
76 | **** You may distribute under the terms of either the GNU General Public |
77 | **** License or the Artistic License, as specified in the README file. | |
a687059c LW |
78 | * |
79 | * Beware that some of this code is subtly aware of the way operator | |
80 | * precedence is structured in regular expressions. Serious changes in | |
81 | * regular-expression syntax might require a total rethink. | |
82 | */ | |
83 | #include "EXTERN.h" | |
864dbfa3 | 84 | #define PERL_IN_REGEXEC_C |
a687059c | 85 | #include "perl.h" |
0f5d15d6 | 86 | |
54df2634 NC |
87 | #ifdef PERL_IN_XSUB_RE |
88 | # include "re_comp.h" | |
89 | #else | |
90 | # include "regcomp.h" | |
91 | #endif | |
a687059c | 92 | |
81e983c1 | 93 | #include "inline_invlist.c" |
1b0f46bf | 94 | #include "unicode_constants.h" |
81e983c1 | 95 | |
c74f6de9 KW |
96 | #define HAS_NONLATIN1_FOLD_CLOSURE(i) _HAS_NONLATIN1_FOLD_CLOSURE_ONLY_FOR_USE_BY_REGCOMP_DOT_C_AND_REGEXEC_DOT_C(i) |
97 | ||
a687059c LW |
98 | #ifndef STATIC |
99 | #define STATIC static | |
100 | #endif | |
101 | ||
e0193e47 | 102 | /* Valid for non-utf8 strings: avoids the reginclass |
7e2509c1 KW |
103 | * call if there are no complications: i.e., if everything matchable is |
104 | * straight forward in the bitmap */ | |
635cd5d4 | 105 | #define REGINCLASS(prog,p,c) (ANYOF_FLAGS(p) ? reginclass(prog,p,c,0) \ |
af364d03 | 106 | : ANYOF_BITMAP_TEST(p,*(c))) |
7d3e948e | 107 | |
c277df42 IZ |
108 | /* |
109 | * Forwards. | |
110 | */ | |
111 | ||
f2ed9b32 | 112 | #define CHR_SVLEN(sv) (utf8_target ? sv_len_utf8(sv) : SvCUR(sv)) |
53c4c00c | 113 | #define CHR_DIST(a,b) (PL_reg_match_utf8 ? utf8_distance(a,b) : a - b) |
a0ed51b3 | 114 | |
3dab1dad YO |
115 | #define HOPc(pos,off) \ |
116 | (char *)(PL_reg_match_utf8 \ | |
52657f30 | 117 | ? reghop3((U8*)pos, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)) \ |
3dab1dad YO |
118 | : (U8*)(pos + off)) |
119 | #define HOPBACKc(pos, off) \ | |
07be1b83 YO |
120 | (char*)(PL_reg_match_utf8\ |
121 | ? reghopmaybe3((U8*)pos, -off, (U8*)PL_bostr) \ | |
122 | : (pos - off >= PL_bostr) \ | |
8e11feef | 123 | ? (U8*)pos - off \ |
3dab1dad | 124 | : NULL) |
efb30f32 | 125 | |
e7409c1b | 126 | #define HOP3(pos,off,lim) (PL_reg_match_utf8 ? reghop3((U8*)(pos), off, (U8*)(lim)) : (U8*)(pos + off)) |
1aa99e6b | 127 | #define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim)) |
1aa99e6b | 128 | |
7016d6eb DM |
129 | |
130 | #define NEXTCHR_EOS -10 /* nextchr has fallen off the end */ | |
131 | #define NEXTCHR_IS_EOS (nextchr < 0) | |
132 | ||
133 | #define SET_nextchr \ | |
134 | nextchr = ((locinput < PL_regeol) ? UCHARAT(locinput) : NEXTCHR_EOS) | |
135 | ||
136 | #define SET_locinput(p) \ | |
137 | locinput = (p); \ | |
138 | SET_nextchr | |
139 | ||
140 | ||
c7304fe2 KW |
141 | #define LOAD_UTF8_CHARCLASS(swash_ptr, property_name) STMT_START { \ |
142 | if (!swash_ptr) { \ | |
143 | U8 flags = _CORE_SWASH_INIT_ACCEPT_INVLIST; \ | |
c7304fe2 KW |
144 | swash_ptr = _core_swash_init("utf8", property_name, &PL_sv_undef, \ |
145 | 1, 0, NULL, &flags); \ | |
146 | assert(swash_ptr); \ | |
147 | } \ | |
148 | } STMT_END | |
149 | ||
150 | /* If in debug mode, we test that a known character properly matches */ | |
151 | #ifdef DEBUGGING | |
152 | # define LOAD_UTF8_CHARCLASS_DEBUG_TEST(swash_ptr, \ | |
153 | property_name, \ | |
154 | utf8_char_in_property) \ | |
155 | LOAD_UTF8_CHARCLASS(swash_ptr, property_name); \ | |
156 | assert(swash_fetch(swash_ptr, (U8 *) utf8_char_in_property, TRUE)); | |
157 | #else | |
158 | # define LOAD_UTF8_CHARCLASS_DEBUG_TEST(swash_ptr, \ | |
159 | property_name, \ | |
160 | utf8_char_in_property) \ | |
161 | LOAD_UTF8_CHARCLASS(swash_ptr, property_name) | |
162 | #endif | |
d1eb3177 | 163 | |
c7304fe2 KW |
164 | #define LOAD_UTF8_CHARCLASS_ALNUM() LOAD_UTF8_CHARCLASS_DEBUG_TEST( \ |
165 | PL_utf8_swash_ptrs[_CC_WORDCHAR], \ | |
166 | swash_property_names[_CC_WORDCHAR], \ | |
167 | GREEK_SMALL_LETTER_IOTA_UTF8) | |
168 | ||
169 | #define LOAD_UTF8_CHARCLASS_GCB() /* Grapheme cluster boundaries */ \ | |
170 | STMT_START { \ | |
171 | LOAD_UTF8_CHARCLASS_DEBUG_TEST(PL_utf8_X_regular_begin, \ | |
172 | "_X_regular_begin", \ | |
173 | GREEK_SMALL_LETTER_IOTA_UTF8); \ | |
174 | LOAD_UTF8_CHARCLASS_DEBUG_TEST(PL_utf8_X_extend, \ | |
175 | "_X_extend", \ | |
176 | COMBINING_GRAVE_ACCENT_UTF8); \ | |
177 | } STMT_END | |
d1eb3177 | 178 | |
c7304fe2 | 179 | #define PLACEHOLDER /* Something for the preprocessor to grab onto */ |
3dab1dad YO |
180 | /* TODO: Combine JUMPABLE and HAS_TEXT to cache OP(rn) */ |
181 | ||
5f80c4cf | 182 | /* for use after a quantifier and before an EXACT-like node -- japhy */ |
c35dcbe2 YO |
183 | /* it would be nice to rework regcomp.sym to generate this stuff. sigh |
184 | * | |
185 | * NOTE that *nothing* that affects backtracking should be in here, specifically | |
186 | * VERBS must NOT be included. JUMPABLE is used to determine if we can ignore a | |
187 | * node that is in between two EXACT like nodes when ascertaining what the required | |
188 | * "follow" character is. This should probably be moved to regex compile time | |
189 | * although it may be done at run time beause of the REF possibility - more | |
190 | * investigation required. -- demerphq | |
191 | */ | |
3e901dc0 YO |
192 | #define JUMPABLE(rn) ( \ |
193 | OP(rn) == OPEN || \ | |
194 | (OP(rn) == CLOSE && (!cur_eval || cur_eval->u.eval.close_paren != ARG(rn))) || \ | |
195 | OP(rn) == EVAL || \ | |
cca55fe3 JP |
196 | OP(rn) == SUSPEND || OP(rn) == IFMATCH || \ |
197 | OP(rn) == PLUS || OP(rn) == MINMOD || \ | |
d1c771f5 | 198 | OP(rn) == KEEPS || \ |
3dab1dad | 199 | (PL_regkind[OP(rn)] == CURLY && ARG1(rn) > 0) \ |
e2d8ce26 | 200 | ) |
ee9b8eae | 201 | #define IS_EXACT(rn) (PL_regkind[OP(rn)] == EXACT) |
e2d8ce26 | 202 | |
ee9b8eae YO |
203 | #define HAS_TEXT(rn) ( IS_EXACT(rn) || PL_regkind[OP(rn)] == REF ) |
204 | ||
205 | #if 0 | |
206 | /* Currently these are only used when PL_regkind[OP(rn)] == EXACT so | |
207 | we don't need this definition. */ | |
208 | #define IS_TEXT(rn) ( OP(rn)==EXACT || OP(rn)==REF || OP(rn)==NREF ) | |
fab2782b | 209 | #define IS_TEXTF(rn) ( OP(rn)==EXACTFU || OP(rn)==EXACTFU_SS || OP(rn)==EXACTFU_TRICKYFOLD || OP(rn)==EXACTFA || OP(rn)==EXACTF || OP(rn)==REFF || OP(rn)==NREFF ) |
ee9b8eae YO |
210 | #define IS_TEXTFL(rn) ( OP(rn)==EXACTFL || OP(rn)==REFFL || OP(rn)==NREFFL ) |
211 | ||
212 | #else | |
213 | /* ... so we use this as its faster. */ | |
214 | #define IS_TEXT(rn) ( OP(rn)==EXACT ) | |
fab2782b | 215 | #define IS_TEXTFU(rn) ( OP(rn)==EXACTFU || OP(rn)==EXACTFU_SS || OP(rn)==EXACTFU_TRICKYFOLD || OP(rn) == EXACTFA) |
ee9b8eae YO |
216 | #define IS_TEXTF(rn) ( OP(rn)==EXACTF ) |
217 | #define IS_TEXTFL(rn) ( OP(rn)==EXACTFL ) | |
218 | ||
219 | #endif | |
e2d8ce26 | 220 | |
a84d97b6 HS |
221 | /* |
222 | Search for mandatory following text node; for lookahead, the text must | |
223 | follow but for lookbehind (rn->flags != 0) we skip to the next step. | |
224 | */ | |
cca55fe3 | 225 | #define FIND_NEXT_IMPT(rn) STMT_START { \ |
3dab1dad YO |
226 | while (JUMPABLE(rn)) { \ |
227 | const OPCODE type = OP(rn); \ | |
228 | if (type == SUSPEND || PL_regkind[type] == CURLY) \ | |
e2d8ce26 | 229 | rn = NEXTOPER(NEXTOPER(rn)); \ |
3dab1dad | 230 | else if (type == PLUS) \ |
cca55fe3 | 231 | rn = NEXTOPER(rn); \ |
3dab1dad | 232 | else if (type == IFMATCH) \ |
a84d97b6 | 233 | rn = (rn->flags == 0) ? NEXTOPER(NEXTOPER(rn)) : rn + ARG(rn); \ |
e2d8ce26 | 234 | else rn += NEXT_OFF(rn); \ |
3dab1dad | 235 | } \ |
5f80c4cf | 236 | } STMT_END |
74750237 | 237 | |
22913b96 KW |
238 | /* These constants are for finding GCB=LV and GCB=LVT in the CLUMP regnode. |
239 | * These are for the pre-composed Hangul syllables, which are all in a | |
240 | * contiguous block and arranged there in such a way so as to facilitate | |
241 | * alorithmic determination of their characteristics. As such, they don't need | |
242 | * a swash, but can be determined by simple arithmetic. Almost all are | |
243 | * GCB=LVT, but every 28th one is a GCB=LV */ | |
244 | #define SBASE 0xAC00 /* Start of block */ | |
245 | #define SCount 11172 /* Length of block */ | |
246 | #define TCount 28 | |
c476f425 | 247 | |
acfe0abc | 248 | static void restore_pos(pTHX_ void *arg); |
51371543 | 249 | |
87c0511b | 250 | #define REGCP_PAREN_ELEMS 3 |
f067efbf | 251 | #define REGCP_OTHER_ELEMS 3 |
e0fa7e2b | 252 | #define REGCP_FRAME_ELEMS 1 |
620d5b66 NC |
253 | /* REGCP_FRAME_ELEMS are not part of the REGCP_OTHER_ELEMS and |
254 | * are needed for the regexp context stack bookkeeping. */ | |
255 | ||
76e3520e | 256 | STATIC CHECKPOINT |
92da3157 | 257 | S_regcppush(pTHX_ const regexp *rex, I32 parenfloor, U32 maxopenparen) |
a0d0e21e | 258 | { |
97aff369 | 259 | dVAR; |
a3b680e6 | 260 | const int retval = PL_savestack_ix; |
92da3157 DM |
261 | const int paren_elems_to_push = |
262 | (maxopenparen - parenfloor) * REGCP_PAREN_ELEMS; | |
e0fa7e2b NC |
263 | const UV total_elems = paren_elems_to_push + REGCP_OTHER_ELEMS; |
264 | const UV elems_shifted = total_elems << SAVE_TIGHT_SHIFT; | |
87c0511b | 265 | I32 p; |
40a82448 | 266 | GET_RE_DEBUG_FLAGS_DECL; |
a0d0e21e | 267 | |
b93070ed DM |
268 | PERL_ARGS_ASSERT_REGCPPUSH; |
269 | ||
e49a9654 | 270 | if (paren_elems_to_push < 0) |
5637ef5b NC |
271 | Perl_croak(aTHX_ "panic: paren_elems_to_push, %i < 0", |
272 | paren_elems_to_push); | |
e49a9654 | 273 | |
e0fa7e2b NC |
274 | if ((elems_shifted >> SAVE_TIGHT_SHIFT) != total_elems) |
275 | Perl_croak(aTHX_ "panic: paren_elems_to_push offset %"UVuf | |
5df417d0 | 276 | " out of range (%lu-%ld)", |
92da3157 DM |
277 | total_elems, |
278 | (unsigned long)maxopenparen, | |
279 | (long)parenfloor); | |
e0fa7e2b | 280 | |
620d5b66 | 281 | SSGROW(total_elems + REGCP_FRAME_ELEMS); |
7f69552c | 282 | |
495f47a5 | 283 | DEBUG_BUFFERS_r( |
92da3157 | 284 | if ((int)maxopenparen > (int)parenfloor) |
495f47a5 DM |
285 | PerlIO_printf(Perl_debug_log, |
286 | "rex=0x%"UVxf" offs=0x%"UVxf": saving capture indices:\n", | |
287 | PTR2UV(rex), | |
288 | PTR2UV(rex->offs) | |
289 | ); | |
290 | ); | |
92da3157 | 291 | for (p = parenfloor+1; p <= (I32)maxopenparen; p++) { |
b1ce53c5 | 292 | /* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */ |
b93070ed DM |
293 | SSPUSHINT(rex->offs[p].end); |
294 | SSPUSHINT(rex->offs[p].start); | |
1ca2007e | 295 | SSPUSHINT(rex->offs[p].start_tmp); |
e7707071 | 296 | DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log, |
495f47a5 DM |
297 | " \\%"UVuf": %"IVdf"(%"IVdf")..%"IVdf"\n", |
298 | (UV)p, | |
299 | (IV)rex->offs[p].start, | |
300 | (IV)rex->offs[p].start_tmp, | |
301 | (IV)rex->offs[p].end | |
40a82448 | 302 | )); |
a0d0e21e | 303 | } |
b1ce53c5 | 304 | /* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */ |
92da3157 | 305 | SSPUSHINT(maxopenparen); |
b93070ed DM |
306 | SSPUSHINT(rex->lastparen); |
307 | SSPUSHINT(rex->lastcloseparen); | |
e0fa7e2b | 308 | SSPUSHUV(SAVEt_REGCONTEXT | elems_shifted); /* Magic cookie. */ |
41123dfd | 309 | |
a0d0e21e LW |
310 | return retval; |
311 | } | |
312 | ||
c277df42 | 313 | /* These are needed since we do not localize EVAL nodes: */ |
ab3bbdeb YO |
314 | #define REGCP_SET(cp) \ |
315 | DEBUG_STATE_r( \ | |
ab3bbdeb | 316 | PerlIO_printf(Perl_debug_log, \ |
e4f74956 | 317 | " Setting an EVAL scope, savestack=%"IVdf"\n", \ |
ab3bbdeb YO |
318 | (IV)PL_savestack_ix)); \ |
319 | cp = PL_savestack_ix | |
c3464db5 | 320 | |
ab3bbdeb | 321 | #define REGCP_UNWIND(cp) \ |
e4f74956 | 322 | DEBUG_STATE_r( \ |
ab3bbdeb | 323 | if (cp != PL_savestack_ix) \ |
e4f74956 YO |
324 | PerlIO_printf(Perl_debug_log, \ |
325 | " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \ | |
ab3bbdeb YO |
326 | (IV)(cp), (IV)PL_savestack_ix)); \ |
327 | regcpblow(cp) | |
c277df42 | 328 | |
a8d1f4b4 DM |
329 | #define UNWIND_PAREN(lp, lcp) \ |
330 | for (n = rex->lastparen; n > lp; n--) \ | |
331 | rex->offs[n].end = -1; \ | |
332 | rex->lastparen = n; \ | |
333 | rex->lastcloseparen = lcp; | |
334 | ||
335 | ||
f067efbf | 336 | STATIC void |
92da3157 | 337 | S_regcppop(pTHX_ regexp *rex, U32 *maxopenparen_p) |
a0d0e21e | 338 | { |
97aff369 | 339 | dVAR; |
e0fa7e2b | 340 | UV i; |
87c0511b | 341 | U32 paren; |
a3621e74 YO |
342 | GET_RE_DEBUG_FLAGS_DECL; |
343 | ||
7918f24d NC |
344 | PERL_ARGS_ASSERT_REGCPPOP; |
345 | ||
b1ce53c5 | 346 | /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */ |
c6bf6a65 | 347 | i = SSPOPUV; |
e0fa7e2b NC |
348 | assert((i & SAVE_MASK) == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */ |
349 | i >>= SAVE_TIGHT_SHIFT; /* Parentheses elements to pop. */ | |
b93070ed DM |
350 | rex->lastcloseparen = SSPOPINT; |
351 | rex->lastparen = SSPOPINT; | |
92da3157 | 352 | *maxopenparen_p = SSPOPINT; |
b1ce53c5 | 353 | |
620d5b66 | 354 | i -= REGCP_OTHER_ELEMS; |
b1ce53c5 | 355 | /* Now restore the parentheses context. */ |
495f47a5 DM |
356 | DEBUG_BUFFERS_r( |
357 | if (i || rex->lastparen + 1 <= rex->nparens) | |
358 | PerlIO_printf(Perl_debug_log, | |
359 | "rex=0x%"UVxf" offs=0x%"UVxf": restoring capture indices to:\n", | |
360 | PTR2UV(rex), | |
361 | PTR2UV(rex->offs) | |
362 | ); | |
363 | ); | |
92da3157 | 364 | paren = *maxopenparen_p; |
620d5b66 | 365 | for ( ; i > 0; i -= REGCP_PAREN_ELEMS) { |
1df70142 | 366 | I32 tmps; |
1ca2007e | 367 | rex->offs[paren].start_tmp = SSPOPINT; |
b93070ed | 368 | rex->offs[paren].start = SSPOPINT; |
cf93c79d | 369 | tmps = SSPOPINT; |
b93070ed DM |
370 | if (paren <= rex->lastparen) |
371 | rex->offs[paren].end = tmps; | |
495f47a5 DM |
372 | DEBUG_BUFFERS_r( PerlIO_printf(Perl_debug_log, |
373 | " \\%"UVuf": %"IVdf"(%"IVdf")..%"IVdf"%s\n", | |
374 | (UV)paren, | |
375 | (IV)rex->offs[paren].start, | |
376 | (IV)rex->offs[paren].start_tmp, | |
377 | (IV)rex->offs[paren].end, | |
378 | (paren > rex->lastparen ? "(skipped)" : "")); | |
c277df42 | 379 | ); |
87c0511b | 380 | paren--; |
a0d0e21e | 381 | } |
daf18116 | 382 | #if 1 |
dafc8851 JH |
383 | /* It would seem that the similar code in regtry() |
384 | * already takes care of this, and in fact it is in | |
385 | * a better location to since this code can #if 0-ed out | |
386 | * but the code in regtry() is needed or otherwise tests | |
387 | * requiring null fields (pat.t#187 and split.t#{13,14} | |
daf18116 JH |
388 | * (as of patchlevel 7877) will fail. Then again, |
389 | * this code seems to be necessary or otherwise | |
225593e1 DM |
390 | * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/ |
391 | * --jhi updated by dapm */ | |
b93070ed | 392 | for (i = rex->lastparen + 1; i <= rex->nparens; i++) { |
92da3157 | 393 | if (i > *maxopenparen_p) |
b93070ed DM |
394 | rex->offs[i].start = -1; |
395 | rex->offs[i].end = -1; | |
495f47a5 DM |
396 | DEBUG_BUFFERS_r( PerlIO_printf(Perl_debug_log, |
397 | " \\%"UVuf": %s ..-1 undeffing\n", | |
398 | (UV)i, | |
92da3157 | 399 | (i > *maxopenparen_p) ? "-1" : " " |
495f47a5 | 400 | )); |
a0d0e21e | 401 | } |
dafc8851 | 402 | #endif |
a0d0e21e LW |
403 | } |
404 | ||
74088413 DM |
405 | /* restore the parens and associated vars at savestack position ix, |
406 | * but without popping the stack */ | |
407 | ||
408 | STATIC void | |
92da3157 | 409 | S_regcp_restore(pTHX_ regexp *rex, I32 ix, U32 *maxopenparen_p) |
74088413 DM |
410 | { |
411 | I32 tmpix = PL_savestack_ix; | |
412 | PL_savestack_ix = ix; | |
92da3157 | 413 | regcppop(rex, maxopenparen_p); |
74088413 DM |
414 | PL_savestack_ix = tmpix; |
415 | } | |
416 | ||
02db2b7b | 417 | #define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */ |
a0d0e21e | 418 | |
31c7f561 KW |
419 | STATIC bool |
420 | S_isFOO_lc(pTHX_ const U8 classnum, const U8 character) | |
421 | { | |
422 | /* Returns a boolean as to whether or not 'character' is a member of the | |
423 | * Posix character class given by 'classnum' that should be equivalent to a | |
424 | * value in the typedef '_char_class_number'. | |
425 | * | |
426 | * Ideally this could be replaced by a just an array of function pointers | |
427 | * to the C library functions that implement the macros this calls. | |
428 | * However, to compile, the precise function signatures are required, and | |
429 | * these may vary from platform to to platform. To avoid having to figure | |
430 | * out what those all are on each platform, I (khw) am using this method, | |
7aee35ff KW |
431 | * which adds an extra layer of function call overhead (unless the C |
432 | * optimizer strips it away). But we don't particularly care about | |
433 | * performance with locales anyway. */ | |
31c7f561 KW |
434 | |
435 | switch ((_char_class_number) classnum) { | |
15861f94 | 436 | case _CC_ENUM_ALPHANUMERIC: return isALPHANUMERIC_LC(character); |
31c7f561 | 437 | case _CC_ENUM_ALPHA: return isALPHA_LC(character); |
e8d596e0 KW |
438 | case _CC_ENUM_ASCII: return isASCII_LC(character); |
439 | case _CC_ENUM_BLANK: return isBLANK_LC(character); | |
b0d691b2 KW |
440 | case _CC_ENUM_CASED: return isLOWER_LC(character) |
441 | || isUPPER_LC(character); | |
e8d596e0 | 442 | case _CC_ENUM_CNTRL: return isCNTRL_LC(character); |
31c7f561 KW |
443 | case _CC_ENUM_DIGIT: return isDIGIT_LC(character); |
444 | case _CC_ENUM_GRAPH: return isGRAPH_LC(character); | |
445 | case _CC_ENUM_LOWER: return isLOWER_LC(character); | |
446 | case _CC_ENUM_PRINT: return isPRINT_LC(character); | |
e8d596e0 | 447 | case _CC_ENUM_PSXSPC: return isPSXSPC_LC(character); |
31c7f561 | 448 | case _CC_ENUM_PUNCT: return isPUNCT_LC(character); |
e8d596e0 | 449 | case _CC_ENUM_SPACE: return isSPACE_LC(character); |
31c7f561 KW |
450 | case _CC_ENUM_UPPER: return isUPPER_LC(character); |
451 | case _CC_ENUM_WORDCHAR: return isWORDCHAR_LC(character); | |
31c7f561 | 452 | case _CC_ENUM_XDIGIT: return isXDIGIT_LC(character); |
31c7f561 KW |
453 | default: /* VERTSPACE should never occur in locales */ |
454 | Perl_croak(aTHX_ "panic: isFOO_lc() has an unexpected character class '%d'", classnum); | |
455 | } | |
456 | ||
457 | assert(0); /* NOTREACHED */ | |
458 | return FALSE; | |
459 | } | |
460 | ||
3018b823 KW |
461 | STATIC bool |
462 | S_isFOO_utf8_lc(pTHX_ const U8 classnum, const U8* character) | |
463 | { | |
464 | /* Returns a boolean as to whether or not the (well-formed) UTF-8-encoded | |
465 | * 'character' is a member of the Posix character class given by 'classnum' | |
466 | * that should be equivalent to a value in the typedef | |
467 | * '_char_class_number'. | |
468 | * | |
469 | * This just calls isFOO_lc on the code point for the character if it is in | |
470 | * the range 0-255. Outside that range, all characters avoid Unicode | |
471 | * rules, ignoring any locale. So use the Unicode function if this class | |
472 | * requires a swash, and use the Unicode macro otherwise. */ | |
473 | ||
474 | PERL_ARGS_ASSERT_ISFOO_UTF8_LC; | |
475 | ||
476 | if (UTF8_IS_INVARIANT(*character)) { | |
477 | return isFOO_lc(classnum, *character); | |
478 | } | |
479 | else if (UTF8_IS_DOWNGRADEABLE_START(*character)) { | |
480 | return isFOO_lc(classnum, | |
481 | TWO_BYTE_UTF8_TO_UNI(*character, *(character + 1))); | |
482 | } | |
483 | ||
484 | if (classnum < _FIRST_NON_SWASH_CC) { | |
485 | ||
486 | /* Initialize the swash unless done already */ | |
487 | if (! PL_utf8_swash_ptrs[classnum]) { | |
488 | U8 flags = _CORE_SWASH_INIT_ACCEPT_INVLIST; | |
489 | PL_utf8_swash_ptrs[classnum] = _core_swash_init("utf8", | |
490 | swash_property_names[classnum], &PL_sv_undef, 1, 0, NULL, &flags); | |
491 | } | |
492 | ||
92a2046b KW |
493 | return cBOOL(swash_fetch(PL_utf8_swash_ptrs[classnum], (U8 *) |
494 | character, | |
495 | TRUE /* is UTF */ )); | |
3018b823 KW |
496 | } |
497 | ||
498 | switch ((_char_class_number) classnum) { | |
499 | case _CC_ENUM_SPACE: | |
500 | case _CC_ENUM_PSXSPC: return is_XPERLSPACE_high(character); | |
501 | ||
502 | case _CC_ENUM_BLANK: return is_HORIZWS_high(character); | |
503 | case _CC_ENUM_XDIGIT: return is_XDIGIT_high(character); | |
504 | case _CC_ENUM_VERTSPACE: return is_VERTWS_high(character); | |
505 | default: return 0; /* Things like CNTRL are always | |
506 | below 256 */ | |
507 | } | |
508 | ||
509 | assert(0); /* NOTREACHED */ | |
510 | return FALSE; | |
511 | } | |
512 | ||
a687059c | 513 | /* |
e50aee73 | 514 | * pregexec and friends |
a687059c LW |
515 | */ |
516 | ||
76234dfb | 517 | #ifndef PERL_IN_XSUB_RE |
a687059c | 518 | /* |
c277df42 | 519 | - pregexec - match a regexp against a string |
a687059c | 520 | */ |
c277df42 | 521 | I32 |
5aaab254 | 522 | Perl_pregexec(pTHX_ REGEXP * const prog, char* stringarg, char *strend, |
c3464db5 | 523 | char *strbeg, I32 minend, SV *screamer, U32 nosave) |
8fd1a950 DM |
524 | /* stringarg: the point in the string at which to begin matching */ |
525 | /* strend: pointer to null at end of string */ | |
526 | /* strbeg: real beginning of string */ | |
527 | /* minend: end of match must be >= minend bytes after stringarg. */ | |
528 | /* screamer: SV being matched: only used for utf8 flag, pos() etc; string | |
529 | * itself is accessed via the pointers above */ | |
530 | /* nosave: For optimizations. */ | |
c277df42 | 531 | { |
7918f24d NC |
532 | PERL_ARGS_ASSERT_PREGEXEC; |
533 | ||
c277df42 | 534 | return |
9041c2e3 | 535 | regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL, |
c277df42 IZ |
536 | nosave ? 0 : REXEC_COPY_STR); |
537 | } | |
76234dfb | 538 | #endif |
22e551b9 | 539 | |
9041c2e3 | 540 | /* |
cad2e5aa JH |
541 | * Need to implement the following flags for reg_anch: |
542 | * | |
543 | * USE_INTUIT_NOML - Useful to call re_intuit_start() first | |
544 | * USE_INTUIT_ML | |
545 | * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer | |
546 | * INTUIT_AUTORITATIVE_ML | |
547 | * INTUIT_ONCE_NOML - Intuit can match in one location only. | |
548 | * INTUIT_ONCE_ML | |
549 | * | |
550 | * Another flag for this function: SECOND_TIME (so that float substrs | |
551 | * with giant delta may be not rechecked). | |
552 | */ | |
553 | ||
554 | /* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */ | |
555 | ||
3f7c398e | 556 | /* If SCREAM, then SvPVX_const(sv) should be compatible with strpos and strend. |
cad2e5aa JH |
557 | Otherwise, only SvCUR(sv) is used to get strbeg. */ |
558 | ||
559 | /* XXXX We assume that strpos is strbeg unless sv. */ | |
560 | ||
6eb5f6b9 JH |
561 | /* XXXX Some places assume that there is a fixed substring. |
562 | An update may be needed if optimizer marks as "INTUITable" | |
563 | RExen without fixed substrings. Similarly, it is assumed that | |
564 | lengths of all the strings are no more than minlen, thus they | |
565 | cannot come from lookahead. | |
40d049e4 YO |
566 | (Or minlen should take into account lookahead.) |
567 | NOTE: Some of this comment is not correct. minlen does now take account | |
568 | of lookahead/behind. Further research is required. -- demerphq | |
569 | ||
570 | */ | |
6eb5f6b9 | 571 | |
2c2d71f5 JH |
572 | /* A failure to find a constant substring means that there is no need to make |
573 | an expensive call to REx engine, thus we celebrate a failure. Similarly, | |
d8da0584 | 574 | finding a substring too deep into the string means that fewer calls to |
30944b6d IZ |
575 | regtry() should be needed. |
576 | ||
577 | REx compiler's optimizer found 4 possible hints: | |
578 | a) Anchored substring; | |
579 | b) Fixed substring; | |
580 | c) Whether we are anchored (beginning-of-line or \G); | |
486ec47a | 581 | d) First node (of those at offset 0) which may distinguish positions; |
6eb5f6b9 | 582 | We use a)b)d) and multiline-part of c), and try to find a position in the |
30944b6d IZ |
583 | string which does not contradict any of them. |
584 | */ | |
2c2d71f5 | 585 | |
6eb5f6b9 JH |
586 | /* Most of decisions we do here should have been done at compile time. |
587 | The nodes of the REx which we used for the search should have been | |
588 | deleted from the finite automaton. */ | |
589 | ||
cad2e5aa | 590 | char * |
288b8c02 | 591 | Perl_re_intuit_start(pTHX_ REGEXP * const rx, SV *sv, char *strpos, |
9f61653a | 592 | char *strend, const U32 flags, re_scream_pos_data *data) |
cad2e5aa | 593 | { |
97aff369 | 594 | dVAR; |
8d919b0a | 595 | struct regexp *const prog = ReANY(rx); |
eb578fdb | 596 | I32 start_shift = 0; |
cad2e5aa | 597 | /* Should be nonnegative! */ |
eb578fdb KW |
598 | I32 end_shift = 0; |
599 | char *s; | |
600 | SV *check; | |
a1933d95 | 601 | char *strbeg; |
cad2e5aa | 602 | char *t; |
f2ed9b32 | 603 | const bool utf8_target = (sv && SvUTF8(sv)) ? 1 : 0; /* if no sv we have to assume bytes */ |
cad2e5aa | 604 | I32 ml_anch; |
eb578fdb | 605 | char *other_last = NULL; /* other substr checked before this */ |
bd61b366 | 606 | char *check_at = NULL; /* check substr found at this pos */ |
d8080198 | 607 | char *checked_upto = NULL; /* how far into the string we have already checked using find_byclass*/ |
bbe252da | 608 | const I32 multiline = prog->extflags & RXf_PMf_MULTILINE; |
f8fc2ecf | 609 | RXi_GET_DECL(prog,progi); |
984e6dd1 | 610 | bool is_utf8_pat; |
30944b6d | 611 | #ifdef DEBUGGING |
890ce7af | 612 | const char * const i_strpos = strpos; |
30944b6d | 613 | #endif |
a3621e74 YO |
614 | GET_RE_DEBUG_FLAGS_DECL; |
615 | ||
7918f24d | 616 | PERL_ARGS_ASSERT_RE_INTUIT_START; |
c33e64f0 FC |
617 | PERL_UNUSED_ARG(flags); |
618 | PERL_UNUSED_ARG(data); | |
7918f24d | 619 | |
f2ed9b32 | 620 | RX_MATCH_UTF8_set(rx,utf8_target); |
cad2e5aa | 621 | |
984e6dd1 | 622 | is_utf8_pat = cBOOL(RX_UTF8(rx)); |
4fab19ce | 623 | |
ab3bbdeb | 624 | DEBUG_EXECUTE_r( |
f2ed9b32 | 625 | debug_start_match(rx, utf8_target, strpos, strend, |
1de06328 YO |
626 | sv ? "Guessing start of match in sv for" |
627 | : "Guessing start of match in string for"); | |
2a782b5b | 628 | ); |
cad2e5aa | 629 | |
c344f387 JH |
630 | /* CHR_DIST() would be more correct here but it makes things slow. */ |
631 | if (prog->minlen > strend - strpos) { | |
a3621e74 | 632 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
a72c7584 | 633 | "String too short... [re_intuit_start]\n")); |
cad2e5aa | 634 | goto fail; |
2c2d71f5 | 635 | } |
d8da0584 | 636 | |
7016d6eb DM |
637 | /* XXX we need to pass strbeg as a separate arg: the following is |
638 | * guesswork and can be wrong... */ | |
639 | if (sv && SvPOK(sv)) { | |
640 | char * p = SvPVX(sv); | |
641 | STRLEN cur = SvCUR(sv); | |
642 | if (p <= strpos && strpos < p + cur) { | |
643 | strbeg = p; | |
644 | assert(p <= strend && strend <= p + cur); | |
645 | } | |
646 | else | |
647 | strbeg = strend - cur; | |
648 | } | |
649 | else | |
650 | strbeg = strpos; | |
651 | ||
1aa99e6b | 652 | PL_regeol = strend; |
f2ed9b32 | 653 | if (utf8_target) { |
33b8afdf JH |
654 | if (!prog->check_utf8 && prog->check_substr) |
655 | to_utf8_substr(prog); | |
656 | check = prog->check_utf8; | |
657 | } else { | |
7e0d5ad7 KW |
658 | if (!prog->check_substr && prog->check_utf8) { |
659 | if (! to_byte_substr(prog)) { | |
6b54ddc5 | 660 | NON_UTF8_TARGET_BUT_UTF8_REQUIRED(fail); |
7e0d5ad7 KW |
661 | } |
662 | } | |
33b8afdf JH |
663 | check = prog->check_substr; |
664 | } | |
bbe252da YO |
665 | if (prog->extflags & RXf_ANCH) { /* Match at beg-of-str or after \n */ |
666 | ml_anch = !( (prog->extflags & RXf_ANCH_SINGLE) | |
667 | || ( (prog->extflags & RXf_ANCH_BOL) | |
7fba1cd6 | 668 | && !multiline ) ); /* Check after \n? */ |
cad2e5aa | 669 | |
7e25d62c | 670 | if (!ml_anch) { |
bbe252da YO |
671 | if ( !(prog->extflags & RXf_ANCH_GPOS) /* Checked by the caller */ |
672 | && !(prog->intflags & PREGf_IMPLICIT) /* not a real BOL */ | |
3f7c398e | 673 | /* SvCUR is not set on references: SvRV and SvPVX_const overlap */ |
7e25d62c JH |
674 | && sv && !SvROK(sv) |
675 | && (strpos != strbeg)) { | |
a3621e74 | 676 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not at start...\n")); |
7e25d62c JH |
677 | goto fail; |
678 | } | |
d46b78c6 KW |
679 | if (prog->check_offset_min == prog->check_offset_max |
680 | && !(prog->extflags & RXf_CANY_SEEN) | |
681 | && ! multiline) /* /m can cause \n's to match that aren't | |
682 | accounted for in the string max length. | |
683 | See [perl #115242] */ | |
684 | { | |
2c2d71f5 | 685 | /* Substring at constant offset from beg-of-str... */ |
cad2e5aa JH |
686 | I32 slen; |
687 | ||
1aa99e6b | 688 | s = HOP3c(strpos, prog->check_offset_min, strend); |
1de06328 | 689 | |
653099ff GS |
690 | if (SvTAIL(check)) { |
691 | slen = SvCUR(check); /* >= 1 */ | |
cad2e5aa | 692 | |
9041c2e3 | 693 | if ( strend - s > slen || strend - s < slen - 1 |
2c2d71f5 | 694 | || (strend - s == slen && strend[-1] != '\n')) { |
a3621e74 | 695 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String too long...\n")); |
2c2d71f5 | 696 | goto fail_finish; |
cad2e5aa JH |
697 | } |
698 | /* Now should match s[0..slen-2] */ | |
699 | slen--; | |
3f7c398e | 700 | if (slen && (*SvPVX_const(check) != *s |
cad2e5aa | 701 | || (slen > 1 |
3f7c398e | 702 | && memNE(SvPVX_const(check), s, slen)))) { |
2c2d71f5 | 703 | report_neq: |
a3621e74 | 704 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String not equal...\n")); |
2c2d71f5 JH |
705 | goto fail_finish; |
706 | } | |
cad2e5aa | 707 | } |
3f7c398e | 708 | else if (*SvPVX_const(check) != *s |
653099ff | 709 | || ((slen = SvCUR(check)) > 1 |
3f7c398e | 710 | && memNE(SvPVX_const(check), s, slen))) |
2c2d71f5 | 711 | goto report_neq; |
c315bfe8 | 712 | check_at = s; |
2c2d71f5 | 713 | goto success_at_start; |
7e25d62c | 714 | } |
cad2e5aa | 715 | } |
2c2d71f5 | 716 | /* Match is anchored, but substr is not anchored wrt beg-of-str. */ |
cad2e5aa | 717 | s = strpos; |
2c2d71f5 | 718 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
1de06328 YO |
719 | end_shift = prog->check_end_shift; |
720 | ||
2c2d71f5 | 721 | if (!ml_anch) { |
a3b680e6 | 722 | const I32 end = prog->check_offset_max + CHR_SVLEN(check) |
653099ff | 723 | - (SvTAIL(check) != 0); |
a3b680e6 | 724 | const I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end; |
2c2d71f5 JH |
725 | |
726 | if (end_shift < eshift) | |
727 | end_shift = eshift; | |
728 | } | |
cad2e5aa | 729 | } |
2c2d71f5 | 730 | else { /* Can match at random position */ |
cad2e5aa JH |
731 | ml_anch = 0; |
732 | s = strpos; | |
1de06328 YO |
733 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
734 | end_shift = prog->check_end_shift; | |
735 | ||
736 | /* end shift should be non negative here */ | |
cad2e5aa JH |
737 | } |
738 | ||
bcdf7404 | 739 | #ifdef QDEBUGGING /* 7/99: reports of failure (with the older version) */ |
0033605d | 740 | if (end_shift < 0) |
1de06328 | 741 | Perl_croak(aTHX_ "panic: end_shift: %"IVdf" pattern:\n%s\n ", |
220fc49f | 742 | (IV)end_shift, RX_PRECOMP(prog)); |
2c2d71f5 JH |
743 | #endif |
744 | ||
2c2d71f5 JH |
745 | restart: |
746 | /* Find a possible match in the region s..strend by looking for | |
747 | the "check" substring in the region corrected by start/end_shift. */ | |
1de06328 YO |
748 | |
749 | { | |
750 | I32 srch_start_shift = start_shift; | |
751 | I32 srch_end_shift = end_shift; | |
c33e64f0 FC |
752 | U8* start_point; |
753 | U8* end_point; | |
1de06328 YO |
754 | if (srch_start_shift < 0 && strbeg - s > srch_start_shift) { |
755 | srch_end_shift -= ((strbeg - s) - srch_start_shift); | |
756 | srch_start_shift = strbeg - s; | |
757 | } | |
6bda09f9 | 758 | DEBUG_OPTIMISE_MORE_r({ |
1de06328 YO |
759 | PerlIO_printf(Perl_debug_log, "Check offset min: %"IVdf" Start shift: %"IVdf" End shift %"IVdf" Real End Shift: %"IVdf"\n", |
760 | (IV)prog->check_offset_min, | |
761 | (IV)srch_start_shift, | |
762 | (IV)srch_end_shift, | |
763 | (IV)prog->check_end_shift); | |
764 | }); | |
765 | ||
bbe252da | 766 | if (prog->extflags & RXf_CANY_SEEN) { |
1de06328 YO |
767 | start_point= (U8*)(s + srch_start_shift); |
768 | end_point= (U8*)(strend - srch_end_shift); | |
769 | } else { | |
770 | start_point= HOP3(s, srch_start_shift, srch_start_shift < 0 ? strbeg : strend); | |
771 | end_point= HOP3(strend, -srch_end_shift, strbeg); | |
772 | } | |
6bda09f9 | 773 | DEBUG_OPTIMISE_MORE_r({ |
56570a2c | 774 | PerlIO_printf(Perl_debug_log, "fbm_instr len=%d str=<%.*s>\n", |
1de06328 | 775 | (int)(end_point - start_point), |
fc8cd66c | 776 | (int)(end_point - start_point) > 20 ? 20 : (int)(end_point - start_point), |
1de06328 YO |
777 | start_point); |
778 | }); | |
779 | ||
780 | s = fbm_instr( start_point, end_point, | |
7fba1cd6 | 781 | check, multiline ? FBMrf_MULTILINE : 0); |
1de06328 | 782 | } |
cad2e5aa JH |
783 | /* Update the count-of-usability, remove useless subpatterns, |
784 | unshift s. */ | |
2c2d71f5 | 785 | |
ab3bbdeb | 786 | DEBUG_EXECUTE_r({ |
f2ed9b32 | 787 | RE_PV_QUOTED_DECL(quoted, utf8_target, PERL_DEBUG_PAD_ZERO(0), |
ab3bbdeb YO |
788 | SvPVX_const(check), RE_SV_DUMPLEN(check), 30); |
789 | PerlIO_printf(Perl_debug_log, "%s %s substr %s%s%s", | |
2c2d71f5 | 790 | (s ? "Found" : "Did not find"), |
f2ed9b32 | 791 | (check == (utf8_target ? prog->anchored_utf8 : prog->anchored_substr) |
ab3bbdeb YO |
792 | ? "anchored" : "floating"), |
793 | quoted, | |
794 | RE_SV_TAIL(check), | |
795 | (s ? " at offset " : "...\n") ); | |
796 | }); | |
2c2d71f5 JH |
797 | |
798 | if (!s) | |
799 | goto fail_finish; | |
2c2d71f5 | 800 | /* Finish the diagnostic message */ |
a3621e74 | 801 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) ); |
2c2d71f5 | 802 | |
1de06328 YO |
803 | /* XXX dmq: first branch is for positive lookbehind... |
804 | Our check string is offset from the beginning of the pattern. | |
805 | So we need to do any stclass tests offset forward from that | |
806 | point. I think. :-( | |
807 | */ | |
808 | ||
809 | ||
810 | ||
811 | check_at=s; | |
812 | ||
813 | ||
2c2d71f5 JH |
814 | /* Got a candidate. Check MBOL anchoring, and the *other* substr. |
815 | Start with the other substr. | |
816 | XXXX no SCREAM optimization yet - and a very coarse implementation | |
a0288114 | 817 | XXXX /ttx+/ results in anchored="ttx", floating="x". floating will |
2c2d71f5 JH |
818 | *always* match. Probably should be marked during compile... |
819 | Probably it is right to do no SCREAM here... | |
820 | */ | |
821 | ||
f2ed9b32 | 822 | if (utf8_target ? (prog->float_utf8 && prog->anchored_utf8) |
1de06328 YO |
823 | : (prog->float_substr && prog->anchored_substr)) |
824 | { | |
30944b6d | 825 | /* Take into account the "other" substring. */ |
2c2d71f5 JH |
826 | /* XXXX May be hopelessly wrong for UTF... */ |
827 | if (!other_last) | |
6eb5f6b9 | 828 | other_last = strpos; |
f2ed9b32 | 829 | if (check == (utf8_target ? prog->float_utf8 : prog->float_substr)) { |
30944b6d IZ |
830 | do_other_anchored: |
831 | { | |
890ce7af AL |
832 | char * const last = HOP3c(s, -start_shift, strbeg); |
833 | char *last1, *last2; | |
be8e71aa | 834 | char * const saved_s = s; |
33b8afdf | 835 | SV* must; |
2c2d71f5 | 836 | |
2c2d71f5 JH |
837 | t = s - prog->check_offset_max; |
838 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ | |
f2ed9b32 | 839 | && (!utf8_target |
0ce71af7 | 840 | || ((t = (char*)reghopmaybe3((U8*)s, -(prog->check_offset_max), (U8*)strpos)) |
2c2d71f5 | 841 | && t > strpos))) |
6f207bd3 | 842 | NOOP; |
2c2d71f5 JH |
843 | else |
844 | t = strpos; | |
1aa99e6b | 845 | t = HOP3c(t, prog->anchored_offset, strend); |
6eb5f6b9 JH |
846 | if (t < other_last) /* These positions already checked */ |
847 | t = other_last; | |
1aa99e6b | 848 | last2 = last1 = HOP3c(strend, -prog->minlen, strbeg); |
2c2d71f5 JH |
849 | if (last < last1) |
850 | last1 = last; | |
1de06328 YO |
851 | /* XXXX It is not documented what units *_offsets are in. |
852 | We assume bytes, but this is clearly wrong. | |
853 | Meaning this code needs to be carefully reviewed for errors. | |
854 | dmq. | |
855 | */ | |
856 | ||
2c2d71f5 | 857 | /* On end-of-str: see comment below. */ |
f2ed9b32 | 858 | must = utf8_target ? prog->anchored_utf8 : prog->anchored_substr; |
33b8afdf JH |
859 | if (must == &PL_sv_undef) { |
860 | s = (char*)NULL; | |
1de06328 | 861 | DEBUG_r(must = prog->anchored_utf8); /* for debug */ |
33b8afdf JH |
862 | } |
863 | else | |
864 | s = fbm_instr( | |
865 | (unsigned char*)t, | |
866 | HOP3(HOP3(last1, prog->anchored_offset, strend) | |
867 | + SvCUR(must), -(SvTAIL(must)!=0), strbeg), | |
868 | must, | |
7fba1cd6 | 869 | multiline ? FBMrf_MULTILINE : 0 |
33b8afdf | 870 | ); |
ab3bbdeb | 871 | DEBUG_EXECUTE_r({ |
f2ed9b32 | 872 | RE_PV_QUOTED_DECL(quoted, utf8_target, PERL_DEBUG_PAD_ZERO(0), |
ab3bbdeb YO |
873 | SvPVX_const(must), RE_SV_DUMPLEN(must), 30); |
874 | PerlIO_printf(Perl_debug_log, "%s anchored substr %s%s", | |
2c2d71f5 | 875 | (s ? "Found" : "Contradicts"), |
ab3bbdeb YO |
876 | quoted, RE_SV_TAIL(must)); |
877 | }); | |
878 | ||
879 | ||
2c2d71f5 JH |
880 | if (!s) { |
881 | if (last1 >= last2) { | |
a3621e74 | 882 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
2c2d71f5 JH |
883 | ", giving up...\n")); |
884 | goto fail_finish; | |
885 | } | |
a3621e74 | 886 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
2c2d71f5 | 887 | ", trying floating at offset %ld...\n", |
be8e71aa | 888 | (long)(HOP3c(saved_s, 1, strend) - i_strpos))); |
1aa99e6b IH |
889 | other_last = HOP3c(last1, prog->anchored_offset+1, strend); |
890 | s = HOP3c(last, 1, strend); | |
2c2d71f5 JH |
891 | goto restart; |
892 | } | |
893 | else { | |
a3621e74 | 894 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", |
30944b6d | 895 | (long)(s - i_strpos))); |
1aa99e6b IH |
896 | t = HOP3c(s, -prog->anchored_offset, strbeg); |
897 | other_last = HOP3c(s, 1, strend); | |
be8e71aa | 898 | s = saved_s; |
2c2d71f5 JH |
899 | if (t == strpos) |
900 | goto try_at_start; | |
2c2d71f5 JH |
901 | goto try_at_offset; |
902 | } | |
30944b6d | 903 | } |
2c2d71f5 JH |
904 | } |
905 | else { /* Take into account the floating substring. */ | |
33b8afdf | 906 | char *last, *last1; |
be8e71aa | 907 | char * const saved_s = s; |
33b8afdf JH |
908 | SV* must; |
909 | ||
910 | t = HOP3c(s, -start_shift, strbeg); | |
911 | last1 = last = | |
912 | HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg); | |
913 | if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset) | |
914 | last = HOP3c(t, prog->float_max_offset, strend); | |
915 | s = HOP3c(t, prog->float_min_offset, strend); | |
916 | if (s < other_last) | |
917 | s = other_last; | |
2c2d71f5 | 918 | /* XXXX It is not documented what units *_offsets are in. Assume bytes. */ |
f2ed9b32 | 919 | must = utf8_target ? prog->float_utf8 : prog->float_substr; |
33b8afdf JH |
920 | /* fbm_instr() takes into account exact value of end-of-str |
921 | if the check is SvTAIL(ed). Since false positives are OK, | |
922 | and end-of-str is not later than strend we are OK. */ | |
923 | if (must == &PL_sv_undef) { | |
924 | s = (char*)NULL; | |
1de06328 | 925 | DEBUG_r(must = prog->float_utf8); /* for debug message */ |
33b8afdf JH |
926 | } |
927 | else | |
2c2d71f5 | 928 | s = fbm_instr((unsigned char*)s, |
33b8afdf JH |
929 | (unsigned char*)last + SvCUR(must) |
930 | - (SvTAIL(must)!=0), | |
7fba1cd6 | 931 | must, multiline ? FBMrf_MULTILINE : 0); |
ab3bbdeb | 932 | DEBUG_EXECUTE_r({ |
f2ed9b32 | 933 | RE_PV_QUOTED_DECL(quoted, utf8_target, PERL_DEBUG_PAD_ZERO(0), |
ab3bbdeb YO |
934 | SvPVX_const(must), RE_SV_DUMPLEN(must), 30); |
935 | PerlIO_printf(Perl_debug_log, "%s floating substr %s%s", | |
33b8afdf | 936 | (s ? "Found" : "Contradicts"), |
ab3bbdeb YO |
937 | quoted, RE_SV_TAIL(must)); |
938 | }); | |
33b8afdf JH |
939 | if (!s) { |
940 | if (last1 == last) { | |
a3621e74 | 941 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
33b8afdf JH |
942 | ", giving up...\n")); |
943 | goto fail_finish; | |
2c2d71f5 | 944 | } |
a3621e74 | 945 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
33b8afdf | 946 | ", trying anchored starting at offset %ld...\n", |
be8e71aa | 947 | (long)(saved_s + 1 - i_strpos))); |
33b8afdf JH |
948 | other_last = last; |
949 | s = HOP3c(t, 1, strend); | |
950 | goto restart; | |
951 | } | |
952 | else { | |
a3621e74 | 953 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", |
33b8afdf JH |
954 | (long)(s - i_strpos))); |
955 | other_last = s; /* Fix this later. --Hugo */ | |
be8e71aa | 956 | s = saved_s; |
33b8afdf JH |
957 | if (t == strpos) |
958 | goto try_at_start; | |
959 | goto try_at_offset; | |
960 | } | |
2c2d71f5 | 961 | } |
cad2e5aa | 962 | } |
2c2d71f5 | 963 | |
1de06328 | 964 | |
9ef43ace | 965 | t= (char*)HOP3( s, -prog->check_offset_max, (prog->check_offset_max<0) ? strend : strpos); |
1de06328 | 966 | |
6bda09f9 | 967 | DEBUG_OPTIMISE_MORE_r( |
1de06328 YO |
968 | PerlIO_printf(Perl_debug_log, |
969 | "Check offset min:%"IVdf" max:%"IVdf" S:%"IVdf" t:%"IVdf" D:%"IVdf" end:%"IVdf"\n", | |
970 | (IV)prog->check_offset_min, | |
971 | (IV)prog->check_offset_max, | |
972 | (IV)(s-strpos), | |
973 | (IV)(t-strpos), | |
974 | (IV)(t-s), | |
975 | (IV)(strend-strpos) | |
976 | ) | |
977 | ); | |
978 | ||
2c2d71f5 | 979 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ |
f2ed9b32 | 980 | && (!utf8_target |
9ef43ace | 981 | || ((t = (char*)reghopmaybe3((U8*)s, -prog->check_offset_max, (U8*) ((prog->check_offset_max<0) ? strend : strpos))) |
1de06328 YO |
982 | && t > strpos))) |
983 | { | |
2c2d71f5 JH |
984 | /* Fixed substring is found far enough so that the match |
985 | cannot start at strpos. */ | |
986 | try_at_offset: | |
cad2e5aa | 987 | if (ml_anch && t[-1] != '\n') { |
30944b6d IZ |
988 | /* Eventually fbm_*() should handle this, but often |
989 | anchored_offset is not 0, so this check will not be wasted. */ | |
990 | /* XXXX In the code below we prefer to look for "^" even in | |
991 | presence of anchored substrings. And we search even | |
992 | beyond the found float position. These pessimizations | |
993 | are historical artefacts only. */ | |
994 | find_anchor: | |
2c2d71f5 | 995 | while (t < strend - prog->minlen) { |
cad2e5aa | 996 | if (*t == '\n') { |
4ee3650e | 997 | if (t < check_at - prog->check_offset_min) { |
f2ed9b32 | 998 | if (utf8_target ? prog->anchored_utf8 : prog->anchored_substr) { |
4ee3650e GS |
999 | /* Since we moved from the found position, |
1000 | we definitely contradict the found anchored | |
30944b6d IZ |
1001 | substr. Due to the above check we do not |
1002 | contradict "check" substr. | |
1003 | Thus we can arrive here only if check substr | |
1004 | is float. Redo checking for "other"=="fixed". | |
1005 | */ | |
9041c2e3 | 1006 | strpos = t + 1; |
a3621e74 | 1007 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n", |
e4584336 | 1008 | PL_colors[0], PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset))); |
30944b6d IZ |
1009 | goto do_other_anchored; |
1010 | } | |
4ee3650e GS |
1011 | /* We don't contradict the found floating substring. */ |
1012 | /* XXXX Why not check for STCLASS? */ | |
cad2e5aa | 1013 | s = t + 1; |
a3621e74 | 1014 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n", |
e4584336 | 1015 | PL_colors[0], PL_colors[1], (long)(s - i_strpos))); |
cad2e5aa JH |
1016 | goto set_useful; |
1017 | } | |
4ee3650e GS |
1018 | /* Position contradicts check-string */ |
1019 | /* XXXX probably better to look for check-string | |
1020 | than for "\n", so one should lower the limit for t? */ | |
a3621e74 | 1021 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n", |
e4584336 | 1022 | PL_colors[0], PL_colors[1], (long)(t + 1 - i_strpos))); |
0e41cd87 | 1023 | other_last = strpos = s = t + 1; |
cad2e5aa JH |
1024 | goto restart; |
1025 | } | |
1026 | t++; | |
1027 | } | |
a3621e74 | 1028 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n", |
e4584336 | 1029 | PL_colors[0], PL_colors[1])); |
2c2d71f5 | 1030 | goto fail_finish; |
cad2e5aa | 1031 | } |
f5952150 | 1032 | else { |
a3621e74 | 1033 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n", |
e4584336 | 1034 | PL_colors[0], PL_colors[1])); |
f5952150 | 1035 | } |
cad2e5aa JH |
1036 | s = t; |
1037 | set_useful: | |
f2ed9b32 | 1038 | ++BmUSEFUL(utf8_target ? prog->check_utf8 : prog->check_substr); /* hooray/5 */ |
cad2e5aa JH |
1039 | } |
1040 | else { | |
f5952150 | 1041 | /* The found string does not prohibit matching at strpos, |
2c2d71f5 | 1042 | - no optimization of calling REx engine can be performed, |
f5952150 GS |
1043 | unless it was an MBOL and we are not after MBOL, |
1044 | or a future STCLASS check will fail this. */ | |
2c2d71f5 JH |
1045 | try_at_start: |
1046 | /* Even in this situation we may use MBOL flag if strpos is offset | |
1047 | wrt the start of the string. */ | |
05b4157f | 1048 | if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */ |
a1933d95 | 1049 | && (strpos != strbeg) && strpos[-1] != '\n' |
d506a20d | 1050 | /* May be due to an implicit anchor of m{.*foo} */ |
bbe252da | 1051 | && !(prog->intflags & PREGf_IMPLICIT)) |
d506a20d | 1052 | { |
cad2e5aa JH |
1053 | t = strpos; |
1054 | goto find_anchor; | |
1055 | } | |
a3621e74 | 1056 | DEBUG_EXECUTE_r( if (ml_anch) |
f5952150 | 1057 | PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n", |
70685ca0 | 1058 | (long)(strpos - i_strpos), PL_colors[0], PL_colors[1]); |
30944b6d | 1059 | ); |
2c2d71f5 | 1060 | success_at_start: |
bbe252da | 1061 | if (!(prog->intflags & PREGf_NAUGHTY) /* XXXX If strpos moved? */ |
f2ed9b32 | 1062 | && (utf8_target ? ( |
33b8afdf JH |
1063 | prog->check_utf8 /* Could be deleted already */ |
1064 | && --BmUSEFUL(prog->check_utf8) < 0 | |
1065 | && (prog->check_utf8 == prog->float_utf8) | |
1066 | ) : ( | |
1067 | prog->check_substr /* Could be deleted already */ | |
1068 | && --BmUSEFUL(prog->check_substr) < 0 | |
1069 | && (prog->check_substr == prog->float_substr) | |
1070 | ))) | |
66e933ab | 1071 | { |
cad2e5aa | 1072 | /* If flags & SOMETHING - do not do it many times on the same match */ |
a3621e74 | 1073 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n")); |
f2ed9b32 KW |
1074 | /* XXX Does the destruction order has to change with utf8_target? */ |
1075 | SvREFCNT_dec(utf8_target ? prog->check_utf8 : prog->check_substr); | |
1076 | SvREFCNT_dec(utf8_target ? prog->check_substr : prog->check_utf8); | |
a0714e2c SS |
1077 | prog->check_substr = prog->check_utf8 = NULL; /* disable */ |
1078 | prog->float_substr = prog->float_utf8 = NULL; /* clear */ | |
1079 | check = NULL; /* abort */ | |
cad2e5aa | 1080 | s = strpos; |
486ec47a | 1081 | /* XXXX If the check string was an implicit check MBOL, then we need to unset the relevant flag |
c9415951 YO |
1082 | see http://bugs.activestate.com/show_bug.cgi?id=87173 */ |
1083 | if (prog->intflags & PREGf_IMPLICIT) | |
1084 | prog->extflags &= ~RXf_ANCH_MBOL; | |
3cf5c195 IZ |
1085 | /* XXXX This is a remnant of the old implementation. It |
1086 | looks wasteful, since now INTUIT can use many | |
6eb5f6b9 | 1087 | other heuristics. */ |
bbe252da | 1088 | prog->extflags &= ~RXf_USE_INTUIT; |
c9415951 | 1089 | /* XXXX What other flags might need to be cleared in this branch? */ |
cad2e5aa JH |
1090 | } |
1091 | else | |
1092 | s = strpos; | |
1093 | } | |
1094 | ||
6eb5f6b9 JH |
1095 | /* Last resort... */ |
1096 | /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */ | |
1de06328 YO |
1097 | /* trie stclasses are too expensive to use here, we are better off to |
1098 | leave it to regmatch itself */ | |
f8fc2ecf | 1099 | if (progi->regstclass && PL_regkind[OP(progi->regstclass)]!=TRIE) { |
6eb5f6b9 JH |
1100 | /* minlen == 0 is possible if regstclass is \b or \B, |
1101 | and the fixed substr is ''$. | |
1102 | Since minlen is already taken into account, s+1 is before strend; | |
1103 | accidentally, minlen >= 1 guaranties no false positives at s + 1 | |
1104 | even for \b or \B. But (minlen? 1 : 0) below assumes that | |
1105 | regstclass does not come from lookahead... */ | |
1106 | /* If regstclass takes bytelength more than 1: If charlength==1, OK. | |
af944926 | 1107 | This leaves EXACTF-ish only, which are dealt with in find_byclass(). */ |
f8fc2ecf YO |
1108 | const U8* const str = (U8*)STRING(progi->regstclass); |
1109 | const int cl_l = (PL_regkind[OP(progi->regstclass)] == EXACT | |
1110 | ? CHR_DIST(str+STR_LEN(progi->regstclass), str) | |
66e933ab | 1111 | : 1); |
1de06328 YO |
1112 | char * endpos; |
1113 | if (prog->anchored_substr || prog->anchored_utf8 || ml_anch) | |
1114 | endpos= HOP3c(s, (prog->minlen ? cl_l : 0), strend); | |
1115 | else if (prog->float_substr || prog->float_utf8) | |
1116 | endpos= HOP3c(HOP3c(check_at, -start_shift, strbeg), cl_l, strend); | |
1117 | else | |
1118 | endpos= strend; | |
1119 | ||
d8080198 YO |
1120 | if (checked_upto < s) |
1121 | checked_upto = s; | |
1122 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %"IVdf" s: %"IVdf" endpos: %"IVdf" checked_upto: %"IVdf"\n", | |
1123 | (IV)start_shift, (IV)(check_at - strbeg), (IV)(s - strbeg), (IV)(endpos - strbeg), (IV)(checked_upto- strbeg))); | |
1124 | ||
6eb5f6b9 | 1125 | t = s; |
984e6dd1 DM |
1126 | s = find_byclass(prog, progi->regstclass, checked_upto, endpos, |
1127 | NULL, is_utf8_pat); | |
d8080198 YO |
1128 | if (s) { |
1129 | checked_upto = s; | |
1130 | } else { | |
6eb5f6b9 | 1131 | #ifdef DEBUGGING |
cbbf8932 | 1132 | const char *what = NULL; |
6eb5f6b9 JH |
1133 | #endif |
1134 | if (endpos == strend) { | |
a3621e74 | 1135 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
6eb5f6b9 JH |
1136 | "Could not match STCLASS...\n") ); |
1137 | goto fail; | |
1138 | } | |
a3621e74 | 1139 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
66e933ab | 1140 | "This position contradicts STCLASS...\n") ); |
bbe252da | 1141 | if ((prog->extflags & RXf_ANCH) && !ml_anch) |
653099ff | 1142 | goto fail; |
d8080198 YO |
1143 | checked_upto = HOPBACKc(endpos, start_shift); |
1144 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %"IVdf" endpos: %"IVdf" checked_upto: %"IVdf"\n", | |
1145 | (IV)start_shift, (IV)(check_at - strbeg), (IV)(endpos - strbeg), (IV)(checked_upto- strbeg))); | |
6eb5f6b9 | 1146 | /* Contradict one of substrings */ |
33b8afdf | 1147 | if (prog->anchored_substr || prog->anchored_utf8) { |
f2ed9b32 | 1148 | if ((utf8_target ? prog->anchored_utf8 : prog->anchored_substr) == check) { |
a3621e74 | 1149 | DEBUG_EXECUTE_r( what = "anchored" ); |
6eb5f6b9 | 1150 | hop_and_restart: |
1aa99e6b | 1151 | s = HOP3c(t, 1, strend); |
66e933ab GS |
1152 | if (s + start_shift + end_shift > strend) { |
1153 | /* XXXX Should be taken into account earlier? */ | |
a3621e74 | 1154 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
66e933ab GS |
1155 | "Could not match STCLASS...\n") ); |
1156 | goto fail; | |
1157 | } | |
5e39e1e5 HS |
1158 | if (!check) |
1159 | goto giveup; | |
a3621e74 | 1160 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 1161 | "Looking for %s substr starting at offset %ld...\n", |
6eb5f6b9 JH |
1162 | what, (long)(s + start_shift - i_strpos)) ); |
1163 | goto restart; | |
1164 | } | |
66e933ab | 1165 | /* Have both, check_string is floating */ |
6eb5f6b9 JH |
1166 | if (t + start_shift >= check_at) /* Contradicts floating=check */ |
1167 | goto retry_floating_check; | |
1168 | /* Recheck anchored substring, but not floating... */ | |
9041c2e3 | 1169 | s = check_at; |
5e39e1e5 HS |
1170 | if (!check) |
1171 | goto giveup; | |
a3621e74 | 1172 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 1173 | "Looking for anchored substr starting at offset %ld...\n", |
6eb5f6b9 JH |
1174 | (long)(other_last - i_strpos)) ); |
1175 | goto do_other_anchored; | |
1176 | } | |
60e71179 GS |
1177 | /* Another way we could have checked stclass at the |
1178 | current position only: */ | |
1179 | if (ml_anch) { | |
1180 | s = t = t + 1; | |
5e39e1e5 HS |
1181 | if (!check) |
1182 | goto giveup; | |
a3621e74 | 1183 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 1184 | "Looking for /%s^%s/m starting at offset %ld...\n", |
e4584336 | 1185 | PL_colors[0], PL_colors[1], (long)(t - i_strpos)) ); |
60e71179 | 1186 | goto try_at_offset; |
66e933ab | 1187 | } |
f2ed9b32 | 1188 | if (!(utf8_target ? prog->float_utf8 : prog->float_substr)) /* Could have been deleted */ |
60e71179 | 1189 | goto fail; |
486ec47a | 1190 | /* Check is floating substring. */ |
6eb5f6b9 JH |
1191 | retry_floating_check: |
1192 | t = check_at - start_shift; | |
a3621e74 | 1193 | DEBUG_EXECUTE_r( what = "floating" ); |
6eb5f6b9 JH |
1194 | goto hop_and_restart; |
1195 | } | |
b7953727 | 1196 | if (t != s) { |
a3621e74 | 1197 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
6eb5f6b9 | 1198 | "By STCLASS: moving %ld --> %ld\n", |
b7953727 JH |
1199 | (long)(t - i_strpos), (long)(s - i_strpos)) |
1200 | ); | |
1201 | } | |
1202 | else { | |
a3621e74 | 1203 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
b7953727 JH |
1204 | "Does not contradict STCLASS...\n"); |
1205 | ); | |
1206 | } | |
6eb5f6b9 | 1207 | } |
5e39e1e5 | 1208 | giveup: |
a3621e74 | 1209 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n", |
5e39e1e5 HS |
1210 | PL_colors[4], (check ? "Guessed" : "Giving up"), |
1211 | PL_colors[5], (long)(s - i_strpos)) ); | |
cad2e5aa | 1212 | return s; |
2c2d71f5 JH |
1213 | |
1214 | fail_finish: /* Substring not found */ | |
33b8afdf | 1215 | if (prog->check_substr || prog->check_utf8) /* could be removed already */ |
f2ed9b32 | 1216 | BmUSEFUL(utf8_target ? prog->check_utf8 : prog->check_substr) += 5; /* hooray */ |
cad2e5aa | 1217 | fail: |
a3621e74 | 1218 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n", |
e4584336 | 1219 | PL_colors[4], PL_colors[5])); |
bd61b366 | 1220 | return NULL; |
cad2e5aa | 1221 | } |
9661b544 | 1222 | |
a0a388a1 YO |
1223 | #define DECL_TRIE_TYPE(scan) \ |
1224 | const enum { trie_plain, trie_utf8, trie_utf8_fold, trie_latin_utf8_fold } \ | |
fab2782b YO |
1225 | trie_type = ((scan->flags == EXACT) \ |
1226 | ? (utf8_target ? trie_utf8 : trie_plain) \ | |
1227 | : (utf8_target ? trie_utf8_fold : trie_latin_utf8_fold)) | |
1228 | ||
fd3249ee YO |
1229 | #define REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, uscan, len, uvc, charid, foldlen, foldbuf, uniflags) \ |
1230 | STMT_START { \ | |
fab2782b YO |
1231 | STRLEN skiplen; \ |
1232 | switch (trie_type) { \ | |
1233 | case trie_utf8_fold: \ | |
1234 | if ( foldlen>0 ) { \ | |
1235 | uvc = utf8n_to_uvuni( (const U8*) uscan, UTF8_MAXLEN, &len, uniflags ); \ | |
1236 | foldlen -= len; \ | |
1237 | uscan += len; \ | |
1238 | len=0; \ | |
1239 | } else { \ | |
1240 | uvc = to_utf8_fold( (const U8*) uc, foldbuf, &foldlen ); \ | |
1241 | len = UTF8SKIP(uc); \ | |
1242 | skiplen = UNISKIP( uvc ); \ | |
1243 | foldlen -= skiplen; \ | |
1244 | uscan = foldbuf + skiplen; \ | |
1245 | } \ | |
1246 | break; \ | |
1247 | case trie_latin_utf8_fold: \ | |
1248 | if ( foldlen>0 ) { \ | |
1249 | uvc = utf8n_to_uvuni( (const U8*) uscan, UTF8_MAXLEN, &len, uniflags ); \ | |
1250 | foldlen -= len; \ | |
1251 | uscan += len; \ | |
1252 | len=0; \ | |
1253 | } else { \ | |
1254 | len = 1; \ | |
1255 | uvc = _to_fold_latin1( (U8) *uc, foldbuf, &foldlen, 1); \ | |
1256 | skiplen = UNISKIP( uvc ); \ | |
1257 | foldlen -= skiplen; \ | |
1258 | uscan = foldbuf + skiplen; \ | |
1259 | } \ | |
1260 | break; \ | |
1261 | case trie_utf8: \ | |
1262 | uvc = utf8n_to_uvuni( (const U8*) uc, UTF8_MAXLEN, &len, uniflags ); \ | |
1263 | break; \ | |
1264 | case trie_plain: \ | |
1265 | uvc = (UV)*uc; \ | |
1266 | len = 1; \ | |
1267 | } \ | |
1268 | if (uvc < 256) { \ | |
1269 | charid = trie->charmap[ uvc ]; \ | |
1270 | } \ | |
1271 | else { \ | |
1272 | charid = 0; \ | |
1273 | if (widecharmap) { \ | |
1274 | SV** const svpp = hv_fetch(widecharmap, \ | |
1275 | (char*)&uvc, sizeof(UV), 0); \ | |
1276 | if (svpp) \ | |
1277 | charid = (U16)SvIV(*svpp); \ | |
1278 | } \ | |
1279 | } \ | |
4cadc6a9 YO |
1280 | } STMT_END |
1281 | ||
4cadc6a9 YO |
1282 | #define REXEC_FBC_EXACTISH_SCAN(CoNd) \ |
1283 | STMT_START { \ | |
1284 | while (s <= e) { \ | |
1285 | if ( (CoNd) \ | |
fac1af77 | 1286 | && (ln == 1 || folder(s, pat_string, ln)) \ |
9a5a5549 | 1287 | && (!reginfo || regtry(reginfo, &s)) ) \ |
4cadc6a9 YO |
1288 | goto got_it; \ |
1289 | s++; \ | |
1290 | } \ | |
1291 | } STMT_END | |
1292 | ||
1293 | #define REXEC_FBC_UTF8_SCAN(CoDe) \ | |
1294 | STMT_START { \ | |
9a902117 | 1295 | while (s < strend) { \ |
4cadc6a9 | 1296 | CoDe \ |
9a902117 | 1297 | s += UTF8SKIP(s); \ |
4cadc6a9 YO |
1298 | } \ |
1299 | } STMT_END | |
1300 | ||
1301 | #define REXEC_FBC_SCAN(CoDe) \ | |
1302 | STMT_START { \ | |
1303 | while (s < strend) { \ | |
1304 | CoDe \ | |
1305 | s++; \ | |
1306 | } \ | |
1307 | } STMT_END | |
1308 | ||
1309 | #define REXEC_FBC_UTF8_CLASS_SCAN(CoNd) \ | |
1310 | REXEC_FBC_UTF8_SCAN( \ | |
1311 | if (CoNd) { \ | |
7aee35ff | 1312 | if (tmp && (!reginfo || regtry(reginfo, &s))) \ |
4cadc6a9 YO |
1313 | goto got_it; \ |
1314 | else \ | |
1315 | tmp = doevery; \ | |
1316 | } \ | |
1317 | else \ | |
1318 | tmp = 1; \ | |
1319 | ) | |
1320 | ||
1321 | #define REXEC_FBC_CLASS_SCAN(CoNd) \ | |
1322 | REXEC_FBC_SCAN( \ | |
1323 | if (CoNd) { \ | |
24b23f37 | 1324 | if (tmp && (!reginfo || regtry(reginfo, &s))) \ |
4cadc6a9 YO |
1325 | goto got_it; \ |
1326 | else \ | |
1327 | tmp = doevery; \ | |
1328 | } \ | |
1329 | else \ | |
1330 | tmp = 1; \ | |
1331 | ) | |
1332 | ||
1333 | #define REXEC_FBC_TRYIT \ | |
24b23f37 | 1334 | if ((!reginfo || regtry(reginfo, &s))) \ |
4cadc6a9 YO |
1335 | goto got_it |
1336 | ||
e1d1eefb | 1337 | #define REXEC_FBC_CSCAN(CoNdUtF8,CoNd) \ |
f2ed9b32 | 1338 | if (utf8_target) { \ |
e1d1eefb YO |
1339 | REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \ |
1340 | } \ | |
1341 | else { \ | |
1342 | REXEC_FBC_CLASS_SCAN(CoNd); \ | |
d981ef24 | 1343 | } |
e1d1eefb | 1344 | |
786e8c11 YO |
1345 | #define DUMP_EXEC_POS(li,s,doutf8) \ |
1346 | dump_exec_pos(li,s,(PL_regeol),(PL_bostr),(PL_reg_starttry),doutf8) | |
1347 | ||
cfaf538b KW |
1348 | |
1349 | #define UTF8_NOLOAD(TEST_NON_UTF8, IF_SUCCESS, IF_FAIL) \ | |
1350 | tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n'; \ | |
1351 | tmp = TEST_NON_UTF8(tmp); \ | |
1352 | REXEC_FBC_UTF8_SCAN( \ | |
1353 | if (tmp == ! TEST_NON_UTF8((U8) *s)) { \ | |
1354 | tmp = !tmp; \ | |
1355 | IF_SUCCESS; \ | |
1356 | } \ | |
1357 | else { \ | |
1358 | IF_FAIL; \ | |
1359 | } \ | |
1360 | ); \ | |
1361 | ||
1362 | #define UTF8_LOAD(TeSt1_UtF8, TeSt2_UtF8, IF_SUCCESS, IF_FAIL) \ | |
1363 | if (s == PL_bostr) { \ | |
1364 | tmp = '\n'; \ | |
1365 | } \ | |
1366 | else { \ | |
1367 | U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr); \ | |
1368 | tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT); \ | |
1369 | } \ | |
1370 | tmp = TeSt1_UtF8; \ | |
1371 | LOAD_UTF8_CHARCLASS_ALNUM(); \ | |
1372 | REXEC_FBC_UTF8_SCAN( \ | |
1373 | if (tmp == ! (TeSt2_UtF8)) { \ | |
1374 | tmp = !tmp; \ | |
1375 | IF_SUCCESS; \ | |
1376 | } \ | |
1377 | else { \ | |
1378 | IF_FAIL; \ | |
1379 | } \ | |
1380 | ); \ | |
1381 | ||
63ac0dad KW |
1382 | /* The only difference between the BOUND and NBOUND cases is that |
1383 | * REXEC_FBC_TRYIT is called when matched in BOUND, and when non-matched in | |
1384 | * NBOUND. This is accomplished by passing it in either the if or else clause, | |
1385 | * with the other one being empty */ | |
1386 | #define FBC_BOUND(TEST_NON_UTF8, TEST1_UTF8, TEST2_UTF8) \ | |
1dcf4a1b | 1387 | FBC_BOUND_COMMON(UTF8_LOAD(TEST1_UTF8, TEST2_UTF8, REXEC_FBC_TRYIT, PLACEHOLDER), TEST_NON_UTF8, REXEC_FBC_TRYIT, PLACEHOLDER) |
cfaf538b KW |
1388 | |
1389 | #define FBC_BOUND_NOLOAD(TEST_NON_UTF8, TEST1_UTF8, TEST2_UTF8) \ | |
1dcf4a1b | 1390 | FBC_BOUND_COMMON(UTF8_NOLOAD(TEST_NON_UTF8, REXEC_FBC_TRYIT, PLACEHOLDER), TEST_NON_UTF8, REXEC_FBC_TRYIT, PLACEHOLDER) |
63ac0dad KW |
1391 | |
1392 | #define FBC_NBOUND(TEST_NON_UTF8, TEST1_UTF8, TEST2_UTF8) \ | |
1dcf4a1b | 1393 | FBC_BOUND_COMMON(UTF8_LOAD(TEST1_UTF8, TEST2_UTF8, PLACEHOLDER, REXEC_FBC_TRYIT), TEST_NON_UTF8, PLACEHOLDER, REXEC_FBC_TRYIT) |
cfaf538b KW |
1394 | |
1395 | #define FBC_NBOUND_NOLOAD(TEST_NON_UTF8, TEST1_UTF8, TEST2_UTF8) \ | |
1dcf4a1b | 1396 | FBC_BOUND_COMMON(UTF8_NOLOAD(TEST_NON_UTF8, PLACEHOLDER, REXEC_FBC_TRYIT), TEST_NON_UTF8, PLACEHOLDER, REXEC_FBC_TRYIT) |
cfaf538b | 1397 | |
63ac0dad KW |
1398 | |
1399 | /* Common to the BOUND and NBOUND cases. Unfortunately the UTF8 tests need to | |
1400 | * be passed in completely with the variable name being tested, which isn't | |
1401 | * such a clean interface, but this is easier to read than it was before. We | |
1402 | * are looking for the boundary (or non-boundary between a word and non-word | |
1403 | * character. The utf8 and non-utf8 cases have the same logic, but the details | |
1404 | * must be different. Find the "wordness" of the character just prior to this | |
1405 | * one, and compare it with the wordness of this one. If they differ, we have | |
1406 | * a boundary. At the beginning of the string, pretend that the previous | |
1407 | * character was a new-line */ | |
cfaf538b | 1408 | #define FBC_BOUND_COMMON(UTF8_CODE, TEST_NON_UTF8, IF_SUCCESS, IF_FAIL) \ |
63ac0dad | 1409 | if (utf8_target) { \ |
cfaf538b | 1410 | UTF8_CODE \ |
63ac0dad KW |
1411 | } \ |
1412 | else { /* Not utf8 */ \ | |
1413 | tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n'; \ | |
1414 | tmp = TEST_NON_UTF8(tmp); \ | |
1415 | REXEC_FBC_SCAN( \ | |
1416 | if (tmp == ! TEST_NON_UTF8((U8) *s)) { \ | |
1417 | tmp = !tmp; \ | |
1418 | IF_SUCCESS; \ | |
1419 | } \ | |
1420 | else { \ | |
1421 | IF_FAIL; \ | |
1422 | } \ | |
1423 | ); \ | |
1424 | } \ | |
1425 | if ((!prog->minlen && tmp) && (!reginfo || regtry(reginfo, &s))) \ | |
1426 | goto got_it; | |
1427 | ||
786e8c11 YO |
1428 | /* We know what class REx starts with. Try to find this position... */ |
1429 | /* if reginfo is NULL, its a dryrun */ | |
1430 | /* annoyingly all the vars in this routine have different names from their counterparts | |
1431 | in regmatch. /grrr */ | |
1432 | ||
3c3eec57 | 1433 | STATIC char * |
07be1b83 | 1434 | S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s, |
984e6dd1 | 1435 | const char *strend, regmatch_info *reginfo, bool is_utf8_pat) |
a687059c | 1436 | { |
73104a1b KW |
1437 | dVAR; |
1438 | const I32 doevery = (prog->intflags & PREGf_SKIP) == 0; | |
1439 | char *pat_string; /* The pattern's exactish string */ | |
1440 | char *pat_end; /* ptr to end char of pat_string */ | |
1441 | re_fold_t folder; /* Function for computing non-utf8 folds */ | |
1442 | const U8 *fold_array; /* array for folding ords < 256 */ | |
1443 | STRLEN ln; | |
1444 | STRLEN lnc; | |
73104a1b KW |
1445 | U8 c1; |
1446 | U8 c2; | |
1447 | char *e; | |
1448 | I32 tmp = 1; /* Scratch variable? */ | |
1449 | const bool utf8_target = PL_reg_match_utf8; | |
1450 | UV utf8_fold_flags = 0; | |
3018b823 KW |
1451 | bool to_complement = FALSE; /* Invert the result? Taking the xor of this |
1452 | with a result inverts that result, as 0^1 = | |
1453 | 1 and 1^1 = 0 */ | |
1454 | _char_class_number classnum; | |
1455 | ||
73104a1b | 1456 | RXi_GET_DECL(prog,progi); |
2f7f8cb1 | 1457 | |
73104a1b | 1458 | PERL_ARGS_ASSERT_FIND_BYCLASS; |
2f7f8cb1 | 1459 | |
73104a1b KW |
1460 | /* We know what class it must start with. */ |
1461 | switch (OP(c)) { | |
1462 | case ANYOF: | |
9aa1e39f | 1463 | case ANYOF_SYNTHETIC: |
954a2af6 | 1464 | case ANYOF_WARN_SUPER: |
73104a1b KW |
1465 | if (utf8_target) { |
1466 | REXEC_FBC_UTF8_CLASS_SCAN( | |
1467 | reginclass(prog, c, (U8*)s, utf8_target)); | |
1468 | } | |
1469 | else { | |
1470 | REXEC_FBC_CLASS_SCAN(REGINCLASS(prog, c, (U8*)s)); | |
1471 | } | |
1472 | break; | |
1473 | case CANY: | |
1474 | REXEC_FBC_SCAN( | |
1475 | if (tmp && (!reginfo || regtry(reginfo, &s))) | |
1476 | goto got_it; | |
1477 | else | |
1478 | tmp = doevery; | |
1479 | ); | |
1480 | break; | |
1481 | ||
1482 | case EXACTFA: | |
984e6dd1 | 1483 | if (is_utf8_pat || utf8_target) { |
73104a1b KW |
1484 | utf8_fold_flags = FOLDEQ_UTF8_NOMIX_ASCII; |
1485 | goto do_exactf_utf8; | |
1486 | } | |
1487 | fold_array = PL_fold_latin1; /* Latin1 folds are not affected by */ | |
1488 | folder = foldEQ_latin1; /* /a, except the sharp s one which */ | |
1489 | goto do_exactf_non_utf8; /* isn't dealt with by these */ | |
77a6d856 | 1490 | |
73104a1b KW |
1491 | case EXACTF: |
1492 | if (utf8_target) { | |
16d951b7 | 1493 | |
73104a1b KW |
1494 | /* regcomp.c already folded this if pattern is in UTF-8 */ |
1495 | utf8_fold_flags = 0; | |
1496 | goto do_exactf_utf8; | |
1497 | } | |
1498 | fold_array = PL_fold; | |
1499 | folder = foldEQ; | |
1500 | goto do_exactf_non_utf8; | |
1501 | ||
1502 | case EXACTFL: | |
984e6dd1 | 1503 | if (is_utf8_pat || utf8_target) { |
73104a1b KW |
1504 | utf8_fold_flags = FOLDEQ_UTF8_LOCALE; |
1505 | goto do_exactf_utf8; | |
1506 | } | |
1507 | fold_array = PL_fold_locale; | |
1508 | folder = foldEQ_locale; | |
1509 | goto do_exactf_non_utf8; | |
3c760661 | 1510 | |
73104a1b | 1511 | case EXACTFU_SS: |
984e6dd1 | 1512 | if (is_utf8_pat) { |
73104a1b KW |
1513 | utf8_fold_flags = FOLDEQ_S2_ALREADY_FOLDED; |
1514 | } | |
1515 | goto do_exactf_utf8; | |
16d951b7 | 1516 | |
73104a1b KW |
1517 | case EXACTFU_TRICKYFOLD: |
1518 | case EXACTFU: | |
984e6dd1 DM |
1519 | if (is_utf8_pat || utf8_target) { |
1520 | utf8_fold_flags = is_utf8_pat ? FOLDEQ_S2_ALREADY_FOLDED : 0; | |
73104a1b KW |
1521 | goto do_exactf_utf8; |
1522 | } | |
fac1af77 | 1523 | |
73104a1b KW |
1524 | /* Any 'ss' in the pattern should have been replaced by regcomp, |
1525 | * so we don't have to worry here about this single special case | |
1526 | * in the Latin1 range */ | |
1527 | fold_array = PL_fold_latin1; | |
1528 | folder = foldEQ_latin1; | |
1529 | ||
1530 | /* FALL THROUGH */ | |
1531 | ||
1532 | do_exactf_non_utf8: /* Neither pattern nor string are UTF8, and there | |
1533 | are no glitches with fold-length differences | |
1534 | between the target string and pattern */ | |
1535 | ||
1536 | /* The idea in the non-utf8 EXACTF* cases is to first find the | |
1537 | * first character of the EXACTF* node and then, if necessary, | |
1538 | * case-insensitively compare the full text of the node. c1 is the | |
1539 | * first character. c2 is its fold. This logic will not work for | |
1540 | * Unicode semantics and the german sharp ss, which hence should | |
1541 | * not be compiled into a node that gets here. */ | |
1542 | pat_string = STRING(c); | |
1543 | ln = STR_LEN(c); /* length to match in octets/bytes */ | |
1544 | ||
1545 | /* We know that we have to match at least 'ln' bytes (which is the | |
1546 | * same as characters, since not utf8). If we have to match 3 | |
1547 | * characters, and there are only 2 availabe, we know without | |
1548 | * trying that it will fail; so don't start a match past the | |
1549 | * required minimum number from the far end */ | |
1550 | e = HOP3c(strend, -((I32)ln), s); | |
1551 | ||
1552 | if (!reginfo && e < s) { | |
1553 | e = s; /* Due to minlen logic of intuit() */ | |
1554 | } | |
fac1af77 | 1555 | |
73104a1b KW |
1556 | c1 = *pat_string; |
1557 | c2 = fold_array[c1]; | |
1558 | if (c1 == c2) { /* If char and fold are the same */ | |
1559 | REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1); | |
1560 | } | |
1561 | else { | |
1562 | REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1 || *(U8*)s == c2); | |
1563 | } | |
1564 | break; | |
fac1af77 | 1565 | |
73104a1b KW |
1566 | do_exactf_utf8: |
1567 | { | |
1568 | unsigned expansion; | |
1569 | ||
1570 | /* If one of the operands is in utf8, we can't use the simpler folding | |
1571 | * above, due to the fact that many different characters can have the | |
1572 | * same fold, or portion of a fold, or different- length fold */ | |
1573 | pat_string = STRING(c); | |
1574 | ln = STR_LEN(c); /* length to match in octets/bytes */ | |
1575 | pat_end = pat_string + ln; | |
984e6dd1 | 1576 | lnc = is_utf8_pat /* length to match in characters */ |
73104a1b KW |
1577 | ? utf8_length((U8 *) pat_string, (U8 *) pat_end) |
1578 | : ln; | |
1579 | ||
1580 | /* We have 'lnc' characters to match in the pattern, but because of | |
1581 | * multi-character folding, each character in the target can match | |
1582 | * up to 3 characters (Unicode guarantees it will never exceed | |
1583 | * this) if it is utf8-encoded; and up to 2 if not (based on the | |
1584 | * fact that the Latin 1 folds are already determined, and the | |
1585 | * only multi-char fold in that range is the sharp-s folding to | |
1586 | * 'ss'. Thus, a pattern character can match as little as 1/3 of a | |
1587 | * string character. Adjust lnc accordingly, rounding up, so that | |
1588 | * if we need to match at least 4+1/3 chars, that really is 5. */ | |
1589 | expansion = (utf8_target) ? UTF8_MAX_FOLD_CHAR_EXPAND : 2; | |
1590 | lnc = (lnc + expansion - 1) / expansion; | |
1591 | ||
1592 | /* As in the non-UTF8 case, if we have to match 3 characters, and | |
1593 | * only 2 are left, it's guaranteed to fail, so don't start a | |
1594 | * match that would require us to go beyond the end of the string | |
1595 | */ | |
1596 | e = HOP3c(strend, -((I32)lnc), s); | |
1597 | ||
1598 | if (!reginfo && e < s) { | |
1599 | e = s; /* Due to minlen logic of intuit() */ | |
1600 | } | |
0658cdde | 1601 | |
73104a1b KW |
1602 | /* XXX Note that we could recalculate e to stop the loop earlier, |
1603 | * as the worst case expansion above will rarely be met, and as we | |
1604 | * go along we would usually find that e moves further to the left. | |
1605 | * This would happen only after we reached the point in the loop | |
1606 | * where if there were no expansion we should fail. Unclear if | |
1607 | * worth the expense */ | |
1608 | ||
1609 | while (s <= e) { | |
1610 | char *my_strend= (char *)strend; | |
1611 | if (foldEQ_utf8_flags(s, &my_strend, 0, utf8_target, | |
984e6dd1 | 1612 | pat_string, NULL, ln, is_utf8_pat, utf8_fold_flags) |
73104a1b KW |
1613 | && (!reginfo || regtry(reginfo, &s)) ) |
1614 | { | |
1615 | goto got_it; | |
1616 | } | |
1617 | s += (utf8_target) ? UTF8SKIP(s) : 1; | |
1618 | } | |
1619 | break; | |
1620 | } | |
1621 | case BOUNDL: | |
272d35c9 | 1622 | RXp_MATCH_TAINTED_on(prog); |
0eb30aeb KW |
1623 | FBC_BOUND(isWORDCHAR_LC, |
1624 | isWORDCHAR_LC_uvchr(UNI_TO_NATIVE(tmp)), | |
1625 | isWORDCHAR_LC_utf8((U8*)s)); | |
73104a1b KW |
1626 | break; |
1627 | case NBOUNDL: | |
272d35c9 | 1628 | RXp_MATCH_TAINTED_on(prog); |
0eb30aeb KW |
1629 | FBC_NBOUND(isWORDCHAR_LC, |
1630 | isWORDCHAR_LC_uvchr(UNI_TO_NATIVE(tmp)), | |
1631 | isWORDCHAR_LC_utf8((U8*)s)); | |
73104a1b KW |
1632 | break; |
1633 | case BOUND: | |
1634 | FBC_BOUND(isWORDCHAR, | |
0eb30aeb | 1635 | isWORDCHAR_uni(tmp), |
03940dc2 | 1636 | cBOOL(swash_fetch(PL_utf8_swash_ptrs[_CC_WORDCHAR], (U8*)s, utf8_target))); |
73104a1b KW |
1637 | break; |
1638 | case BOUNDA: | |
1639 | FBC_BOUND_NOLOAD(isWORDCHAR_A, | |
1640 | isWORDCHAR_A(tmp), | |
1641 | isWORDCHAR_A((U8*)s)); | |
1642 | break; | |
1643 | case NBOUND: | |
1644 | FBC_NBOUND(isWORDCHAR, | |
0eb30aeb | 1645 | isWORDCHAR_uni(tmp), |
03940dc2 | 1646 | cBOOL(swash_fetch(PL_utf8_swash_ptrs[_CC_WORDCHAR], (U8*)s, utf8_target))); |
73104a1b KW |
1647 | break; |
1648 | case NBOUNDA: | |
1649 | FBC_NBOUND_NOLOAD(isWORDCHAR_A, | |
1650 | isWORDCHAR_A(tmp), | |
1651 | isWORDCHAR_A((U8*)s)); | |
1652 | break; | |
1653 | case BOUNDU: | |
1654 | FBC_BOUND(isWORDCHAR_L1, | |
0eb30aeb | 1655 | isWORDCHAR_uni(tmp), |
03940dc2 | 1656 | cBOOL(swash_fetch(PL_utf8_swash_ptrs[_CC_WORDCHAR], (U8*)s, utf8_target))); |
73104a1b KW |
1657 | break; |
1658 | case NBOUNDU: | |
1659 | FBC_NBOUND(isWORDCHAR_L1, | |
0eb30aeb | 1660 | isWORDCHAR_uni(tmp), |
03940dc2 | 1661 | cBOOL(swash_fetch(PL_utf8_swash_ptrs[_CC_WORDCHAR], (U8*)s, utf8_target))); |
73104a1b | 1662 | break; |
73104a1b KW |
1663 | case LNBREAK: |
1664 | REXEC_FBC_CSCAN(is_LNBREAK_utf8_safe(s, strend), | |
1665 | is_LNBREAK_latin1_safe(s, strend) | |
1666 | ); | |
1667 | break; | |
3018b823 KW |
1668 | |
1669 | /* The argument to all the POSIX node types is the class number to pass to | |
1670 | * _generic_isCC() to build a mask for searching in PL_charclass[] */ | |
1671 | ||
1672 | case NPOSIXL: | |
1673 | to_complement = 1; | |
1674 | /* FALLTHROUGH */ | |
1675 | ||
1676 | case POSIXL: | |
272d35c9 | 1677 | RXp_MATCH_TAINTED_on(prog); |
3018b823 KW |
1678 | REXEC_FBC_CSCAN(to_complement ^ cBOOL(isFOO_utf8_lc(FLAGS(c), (U8 *) s)), |
1679 | to_complement ^ cBOOL(isFOO_lc(FLAGS(c), *s))); | |
73104a1b | 1680 | break; |
3018b823 KW |
1681 | |
1682 | case NPOSIXD: | |
1683 | to_complement = 1; | |
1684 | /* FALLTHROUGH */ | |
1685 | ||
1686 | case POSIXD: | |
1687 | if (utf8_target) { | |
1688 | goto posix_utf8; | |
1689 | } | |
1690 | goto posixa; | |
1691 | ||
1692 | case NPOSIXA: | |
1693 | if (utf8_target) { | |
1694 | /* The complement of something that matches only ASCII matches all | |
1695 | * UTF-8 variant code points, plus everything in ASCII that isn't | |
1696 | * in the class */ | |
1697 | REXEC_FBC_UTF8_CLASS_SCAN(! UTF8_IS_INVARIANT(*s) | |
1698 | || ! _generic_isCC_A(*s, FLAGS(c))); | |
1699 | break; | |
1700 | } | |
1701 | ||
1702 | to_complement = 1; | |
1703 | /* FALLTHROUGH */ | |
1704 | ||
73104a1b | 1705 | case POSIXA: |
3018b823 | 1706 | posixa: |
73104a1b | 1707 | /* Don't need to worry about utf8, as it can match only a single |
3018b823 KW |
1708 | * byte invariant character. */ |
1709 | REXEC_FBC_CLASS_SCAN( | |
1710 | to_complement ^ cBOOL(_generic_isCC_A(*s, FLAGS(c)))); | |
73104a1b | 1711 | break; |
3018b823 KW |
1712 | |
1713 | case NPOSIXU: | |
1714 | to_complement = 1; | |
1715 | /* FALLTHROUGH */ | |
1716 | ||
1717 | case POSIXU: | |
1718 | if (! utf8_target) { | |
1719 | REXEC_FBC_CLASS_SCAN(to_complement ^ cBOOL(_generic_isCC(*s, | |
1720 | FLAGS(c)))); | |
1721 | } | |
1722 | else { | |
1723 | ||
1724 | posix_utf8: | |
1725 | classnum = (_char_class_number) FLAGS(c); | |
1726 | if (classnum < _FIRST_NON_SWASH_CC) { | |
1727 | while (s < strend) { | |
1728 | ||
1729 | /* We avoid loading in the swash as long as possible, but | |
1730 | * should we have to, we jump to a separate loop. This | |
1731 | * extra 'if' statement is what keeps this code from being | |
1732 | * just a call to REXEC_FBC_UTF8_CLASS_SCAN() */ | |
1733 | if (UTF8_IS_ABOVE_LATIN1(*s)) { | |
1734 | goto found_above_latin1; | |
1735 | } | |
1736 | if ((UTF8_IS_INVARIANT(*s) | |
1737 | && to_complement ^ cBOOL(_generic_isCC((U8) *s, | |
1738 | classnum))) | |
1739 | || (UTF8_IS_DOWNGRADEABLE_START(*s) | |
1740 | && to_complement ^ cBOOL( | |
1741 | _generic_isCC(TWO_BYTE_UTF8_TO_UNI(*s, *(s + 1)), | |
1742 | classnum)))) | |
1743 | { | |
1744 | if (tmp && (!reginfo || regtry(reginfo, &s))) | |
1745 | goto got_it; | |
1746 | else { | |
1747 | tmp = doevery; | |
1748 | } | |
1749 | } | |
1750 | else { | |
1751 | tmp = 1; | |
1752 | } | |
1753 | s += UTF8SKIP(s); | |
1754 | } | |
1755 | } | |
1756 | else switch (classnum) { /* These classes are implemented as | |
1757 | macros */ | |
1758 | case _CC_ENUM_SPACE: /* XXX would require separate code if we | |
1759 | revert the change of \v matching this */ | |
1760 | /* FALL THROUGH */ | |
1761 | ||
1762 | case _CC_ENUM_PSXSPC: | |
1763 | REXEC_FBC_UTF8_CLASS_SCAN( | |
1764 | to_complement ^ cBOOL(isSPACE_utf8(s))); | |
1765 | break; | |
1766 | ||
1767 | case _CC_ENUM_BLANK: | |
1768 | REXEC_FBC_UTF8_CLASS_SCAN( | |
1769 | to_complement ^ cBOOL(isBLANK_utf8(s))); | |
1770 | break; | |
1771 | ||
1772 | case _CC_ENUM_XDIGIT: | |
1773 | REXEC_FBC_UTF8_CLASS_SCAN( | |
1774 | to_complement ^ cBOOL(isXDIGIT_utf8(s))); | |
1775 | break; | |
1776 | ||
1777 | case _CC_ENUM_VERTSPACE: | |
1778 | REXEC_FBC_UTF8_CLASS_SCAN( | |
1779 | to_complement ^ cBOOL(isVERTWS_utf8(s))); | |
1780 | break; | |
1781 | ||
1782 | case _CC_ENUM_CNTRL: | |
1783 | REXEC_FBC_UTF8_CLASS_SCAN( | |
1784 | to_complement ^ cBOOL(isCNTRL_utf8(s))); | |
1785 | break; | |
1786 | ||
1787 | default: | |
1788 | Perl_croak(aTHX_ "panic: find_byclass() node %d='%s' has an unexpected character class '%d'", OP(c), PL_reg_name[OP(c)], classnum); | |
1789 | assert(0); /* NOTREACHED */ | |
1790 | } | |
1791 | } | |
1792 | break; | |
1793 | ||
1794 | found_above_latin1: /* Here we have to load a swash to get the result | |
1795 | for the current code point */ | |
1796 | if (! PL_utf8_swash_ptrs[classnum]) { | |
1797 | U8 flags = _CORE_SWASH_INIT_ACCEPT_INVLIST; | |
1798 | PL_utf8_swash_ptrs[classnum] = | |
1799 | _core_swash_init("utf8", swash_property_names[classnum], | |
1800 | &PL_sv_undef, 1, 0, NULL, &flags); | |
1801 | } | |
1802 | ||
1803 | /* This is a copy of the loop above for swash classes, though using the | |
1804 | * FBC macro instead of being expanded out. Since we've loaded the | |
1805 | * swash, we don't have to check for that each time through the loop */ | |
1806 | REXEC_FBC_UTF8_CLASS_SCAN( | |
1807 | to_complement ^ cBOOL(_generic_utf8( | |
1808 | classnum, | |
1809 | s, | |
1810 | swash_fetch(PL_utf8_swash_ptrs[classnum], | |
1811 | (U8 *) s, TRUE)))); | |
73104a1b KW |
1812 | break; |
1813 | ||
1814 | case AHOCORASICKC: | |
1815 | case AHOCORASICK: | |
1816 | { | |
1817 | DECL_TRIE_TYPE(c); | |
1818 | /* what trie are we using right now */ | |
1819 | reg_ac_data *aho = (reg_ac_data*)progi->data->data[ ARG( c ) ]; | |
1820 | reg_trie_data *trie = (reg_trie_data*)progi->data->data[ aho->trie ]; | |
1821 | HV *widecharmap = MUTABLE_HV(progi->data->data[ aho->trie + 1 ]); | |
1822 | ||
1823 | const char *last_start = strend - trie->minlen; | |
6148ee25 | 1824 | #ifdef DEBUGGING |
73104a1b | 1825 | const char *real_start = s; |
6148ee25 | 1826 | #endif |
73104a1b KW |
1827 | STRLEN maxlen = trie->maxlen; |
1828 | SV *sv_points; | |
1829 | U8 **points; /* map of where we were in the input string | |
1830 | when reading a given char. For ASCII this | |
1831 | is unnecessary overhead as the relationship | |
1832 | is always 1:1, but for Unicode, especially | |
1833 | case folded Unicode this is not true. */ | |
1834 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; | |
1835 | U8 *bitmap=NULL; | |
1836 | ||
1837 | ||
1838 | GET_RE_DEBUG_FLAGS_DECL; | |
1839 | ||
1840 | /* We can't just allocate points here. We need to wrap it in | |
1841 | * an SV so it gets freed properly if there is a croak while | |
1842 | * running the match */ | |
1843 | ENTER; | |
1844 | SAVETMPS; | |
1845 | sv_points=newSV(maxlen * sizeof(U8 *)); | |
1846 | SvCUR_set(sv_points, | |
1847 | maxlen * sizeof(U8 *)); | |
1848 | SvPOK_on(sv_points); | |
1849 | sv_2mortal(sv_points); | |
1850 | points=(U8**)SvPV_nolen(sv_points ); | |
1851 | if ( trie_type != trie_utf8_fold | |
1852 | && (trie->bitmap || OP(c)==AHOCORASICKC) ) | |
1853 | { | |
1854 | if (trie->bitmap) | |
1855 | bitmap=(U8*)trie->bitmap; | |
1856 | else | |
1857 | bitmap=(U8*)ANYOF_BITMAP(c); | |
1858 | } | |
1859 | /* this is the Aho-Corasick algorithm modified a touch | |
1860 | to include special handling for long "unknown char" sequences. | |
1861 | The basic idea being that we use AC as long as we are dealing | |
1862 | with a possible matching char, when we encounter an unknown char | |
1863 | (and we have not encountered an accepting state) we scan forward | |
1864 | until we find a legal starting char. | |
1865 | AC matching is basically that of trie matching, except that when | |
1866 | we encounter a failing transition, we fall back to the current | |
1867 | states "fail state", and try the current char again, a process | |
1868 | we repeat until we reach the root state, state 1, or a legal | |
1869 | transition. If we fail on the root state then we can either | |
1870 | terminate if we have reached an accepting state previously, or | |
1871 | restart the entire process from the beginning if we have not. | |
1872 | ||
1873 | */ | |
1874 | while (s <= last_start) { | |
1875 | const U32 uniflags = UTF8_ALLOW_DEFAULT; | |
1876 | U8 *uc = (U8*)s; | |
1877 | U16 charid = 0; | |
1878 | U32 base = 1; | |
1879 | U32 state = 1; | |
1880 | UV uvc = 0; | |
1881 | STRLEN len = 0; | |
1882 | STRLEN foldlen = 0; | |
1883 | U8 *uscan = (U8*)NULL; | |
1884 | U8 *leftmost = NULL; | |
1885 | #ifdef DEBUGGING | |
1886 | U32 accepted_word= 0; | |
786e8c11 | 1887 | #endif |
73104a1b KW |
1888 | U32 pointpos = 0; |
1889 | ||
1890 | while ( state && uc <= (U8*)strend ) { | |
1891 | int failed=0; | |
1892 | U32 word = aho->states[ state ].wordnum; | |
1893 | ||
1894 | if( state==1 ) { | |
1895 | if ( bitmap ) { | |
1896 | DEBUG_TRIE_EXECUTE_r( | |
1897 | if ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) { | |
1898 | dump_exec_pos( (char *)uc, c, strend, real_start, | |
1899 | (char *)uc, utf8_target ); | |
1900 | PerlIO_printf( Perl_debug_log, | |
1901 | " Scanning for legal start char...\n"); | |
1902 | } | |
1903 | ); | |
1904 | if (utf8_target) { | |
1905 | while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) { | |
1906 | uc += UTF8SKIP(uc); | |
1907 | } | |
1908 | } else { | |
1909 | while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) { | |
1910 | uc++; | |
1911 | } | |
786e8c11 | 1912 | } |
73104a1b | 1913 | s= (char *)uc; |
07be1b83 | 1914 | } |
73104a1b KW |
1915 | if (uc >(U8*)last_start) break; |
1916 | } | |
1917 | ||
1918 | if ( word ) { | |
1919 | U8 *lpos= points[ (pointpos - trie->wordinfo[word].len) % maxlen ]; | |
1920 | if (!leftmost || lpos < leftmost) { | |
1921 | DEBUG_r(accepted_word=word); | |
1922 | leftmost= lpos; | |
7016d6eb | 1923 | } |
73104a1b | 1924 | if (base==0) break; |
7016d6eb | 1925 | |
73104a1b KW |
1926 | } |
1927 | points[pointpos++ % maxlen]= uc; | |
1928 | if (foldlen || uc < (U8*)strend) { | |
1929 | REXEC_TRIE_READ_CHAR(trie_type, trie, | |
1930 | widecharmap, uc, | |
1931 | uscan, len, uvc, charid, foldlen, | |
1932 | foldbuf, uniflags); | |
1933 | DEBUG_TRIE_EXECUTE_r({ | |
1934 | dump_exec_pos( (char *)uc, c, strend, | |
1935 | real_start, s, utf8_target); | |
1936 | PerlIO_printf(Perl_debug_log, | |
1937 | " Charid:%3u CP:%4"UVxf" ", | |
1938 | charid, uvc); | |
1939 | }); | |
1940 | } | |
1941 | else { | |
1942 | len = 0; | |
1943 | charid = 0; | |
1944 | } | |
07be1b83 | 1945 | |
73104a1b KW |
1946 | |
1947 | do { | |
6148ee25 | 1948 | #ifdef DEBUGGING |
73104a1b | 1949 | word = aho->states[ state ].wordnum; |
6148ee25 | 1950 | #endif |
73104a1b KW |
1951 | base = aho->states[ state ].trans.base; |
1952 | ||
1953 | DEBUG_TRIE_EXECUTE_r({ | |
1954 | if (failed) | |
1955 | dump_exec_pos( (char *)uc, c, strend, real_start, | |
1956 | s, utf8_target ); | |
1957 | PerlIO_printf( Perl_debug_log, | |
1958 | "%sState: %4"UVxf", word=%"UVxf, | |
1959 | failed ? " Fail transition to " : "", | |
1960 | (UV)state, (UV)word); | |
1961 | }); | |
1962 | if ( base ) { | |
1963 | U32 tmp; | |
1964 | I32 offset; | |
1965 | if (charid && | |
1966 | ( ((offset = base + charid | |
1967 | - 1 - trie->uniquecharcount)) >= 0) | |
1968 | && ((U32)offset < trie->lasttrans) | |
1969 | && trie->trans[offset].check == state | |
1970 | && (tmp=trie->trans[offset].next)) | |
1971 | { | |
1972 | DEBUG_TRIE_EXECUTE_r( | |
1973 | PerlIO_printf( Perl_debug_log," - legal\n")); | |
1974 | state = tmp; | |
1975 | break; | |
07be1b83 YO |
1976 | } |
1977 | else { | |
786e8c11 | 1978 | DEBUG_TRIE_EXECUTE_r( |
73104a1b | 1979 | PerlIO_printf( Perl_debug_log," - fail\n")); |
786e8c11 | 1980 | failed = 1; |
73104a1b | 1981 | state = aho->fail[state]; |
07be1b83 | 1982 | } |
07be1b83 | 1983 | } |
73104a1b KW |
1984 | else { |
1985 | /* we must be accepting here */ | |
1986 | DEBUG_TRIE_EXECUTE_r( | |
1987 | PerlIO_printf( Perl_debug_log," - accepting\n")); | |
1988 | failed = 1; | |
1989 | break; | |
786e8c11 | 1990 | } |
73104a1b KW |
1991 | } while(state); |
1992 | uc += len; | |
1993 | if (failed) { | |
1994 | if (leftmost) | |
1995 | break; | |
1996 | if (!state) state = 1; | |
07be1b83 | 1997 | } |
73104a1b KW |
1998 | } |
1999 | if ( aho->states[ state ].wordnum ) { | |
2000 | U8 *lpos = points[ (pointpos - trie->wordinfo[aho->states[ state ].wordnum].len) % maxlen ]; | |
2001 | if (!leftmost || lpos < leftmost) { | |
2002 | DEBUG_r(accepted_word=aho->states[ state ].wordnum); | |
2003 | leftmost = lpos; | |
07be1b83 YO |
2004 | } |
2005 | } | |
73104a1b KW |
2006 | if (leftmost) { |
2007 | s = (char*)leftmost; | |
2008 | DEBUG_TRIE_EXECUTE_r({ | |
2009 | PerlIO_printf( | |
2010 | Perl_debug_log,"Matches word #%"UVxf" at position %"IVdf". Trying full pattern...\n", | |
2011 | (UV)accepted_word, (IV)(s - real_start) | |
2012 | ); | |
2013 | }); | |
2014 | if (!reginfo || regtry(reginfo, &s)) { | |
2015 | FREETMPS; | |
2016 | LEAVE; | |
2017 | goto got_it; | |
2018 | } | |
2019 | s = HOPc(s,1); | |
2020 | DEBUG_TRIE_EXECUTE_r({ | |
2021 | PerlIO_printf( Perl_debug_log,"Pattern failed. Looking for new start point...\n"); | |
2022 | }); | |
2023 | } else { | |
2024 | DEBUG_TRIE_EXECUTE_r( | |
2025 | PerlIO_printf( Perl_debug_log,"No match.\n")); | |
2026 | break; | |
2027 | } | |
2028 | } | |
2029 | FREETMPS; | |
2030 | LEAVE; | |
2031 | } | |
2032 | break; | |
2033 | default: | |
2034 | Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c)); | |
2035 | break; | |
2036 | } | |
2037 | return 0; | |
2038 | got_it: | |
2039 | return s; | |
6eb5f6b9 JH |
2040 | } |
2041 | ||
fae667d5 | 2042 | |
6eb5f6b9 JH |
2043 | /* |
2044 | - regexec_flags - match a regexp against a string | |
2045 | */ | |
2046 | I32 | |
5aaab254 | 2047 | Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, char *strend, |
6eb5f6b9 | 2048 | char *strbeg, I32 minend, SV *sv, void *data, U32 flags) |
8fd1a950 DM |
2049 | /* stringarg: the point in the string at which to begin matching */ |
2050 | /* strend: pointer to null at end of string */ | |
2051 | /* strbeg: real beginning of string */ | |
2052 | /* minend: end of match must be >= minend bytes after stringarg. */ | |
2053 | /* sv: SV being matched: only used for utf8 flag, pos() etc; string | |
2054 | * itself is accessed via the pointers above */ | |
2055 | /* data: May be used for some additional optimizations. | |
2056 | Currently its only used, with a U32 cast, for transmitting | |
2057 | the ganch offset when doing a /g match. This will change */ | |
2058 | /* nosave: For optimizations. */ | |
2059 | ||
6eb5f6b9 | 2060 | { |
97aff369 | 2061 | dVAR; |
8d919b0a | 2062 | struct regexp *const prog = ReANY(rx); |
5aaab254 | 2063 | char *s; |
eb578fdb | 2064 | regnode *c; |
5aaab254 | 2065 | char *startpos = stringarg; |
6eb5f6b9 JH |
2066 | I32 minlen; /* must match at least this many chars */ |
2067 | I32 dontbother = 0; /* how many characters not to try at end */ | |
6eb5f6b9 JH |
2068 | I32 end_shift = 0; /* Same for the end. */ /* CC */ |
2069 | I32 scream_pos = -1; /* Internal iterator of scream. */ | |
ccac19ea | 2070 | char *scream_olds = NULL; |
f2ed9b32 | 2071 | const bool utf8_target = cBOOL(DO_UTF8(sv)); |
2757e526 | 2072 | I32 multiline; |
f8fc2ecf | 2073 | RXi_GET_DECL(prog,progi); |
3b0527fe | 2074 | regmatch_info reginfo; /* create some info to pass to regtry etc */ |
e9105d30 | 2075 | regexp_paren_pair *swap = NULL; |
a3621e74 YO |
2076 | GET_RE_DEBUG_FLAGS_DECL; |
2077 | ||
7918f24d | 2078 | PERL_ARGS_ASSERT_REGEXEC_FLAGS; |
9d4ba2ae | 2079 | PERL_UNUSED_ARG(data); |
6eb5f6b9 JH |
2080 | |
2081 | /* Be paranoid... */ | |
2082 | if (prog == NULL || startpos == NULL) { | |
2083 | Perl_croak(aTHX_ "NULL regexp parameter"); | |
2084 | return 0; | |
2085 | } | |
2086 | ||
bbe252da | 2087 | multiline = prog->extflags & RXf_PMf_MULTILINE; |
288b8c02 | 2088 | reginfo.prog = rx; /* Yes, sorry that this is confusing. */ |
2757e526 | 2089 | |
f2ed9b32 | 2090 | RX_MATCH_UTF8_set(rx, utf8_target); |
1de06328 | 2091 | DEBUG_EXECUTE_r( |
f2ed9b32 | 2092 | debug_start_match(rx, utf8_target, startpos, strend, |
1de06328 YO |
2093 | "Matching"); |
2094 | ); | |
bac06658 | 2095 | |
6eb5f6b9 | 2096 | minlen = prog->minlen; |
1de06328 YO |
2097 | |
2098 | if (strend - startpos < (minlen+(prog->check_offset_min<0?prog->check_offset_min:0))) { | |
a3621e74 | 2099 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
a72c7584 JH |
2100 | "String too short [regexec_flags]...\n")); |
2101 | goto phooey; | |
1aa99e6b | 2102 | } |
6eb5f6b9 | 2103 | |
1de06328 | 2104 | |
6eb5f6b9 | 2105 | /* Check validity of program. */ |
f8fc2ecf | 2106 | if (UCHARAT(progi->program) != REG_MAGIC) { |
6eb5f6b9 JH |
2107 | Perl_croak(aTHX_ "corrupted regexp program"); |
2108 | } | |
2109 | ||
272d35c9 | 2110 | RX_MATCH_TAINTED_off(rx); |
ed301438 | 2111 | PL_reg_state.re_state_eval_setup_done = FALSE; |
6eb5f6b9 JH |
2112 | PL_reg_maxiter = 0; |
2113 | ||
984e6dd1 | 2114 | reginfo.is_utf8_pat = cBOOL(RX_UTF8(rx)); |
39819bd9 | 2115 | reginfo.warned = FALSE; |
6eb5f6b9 | 2116 | /* Mark beginning of line for ^ and lookbehind. */ |
3b0527fe | 2117 | reginfo.bol = startpos; /* XXX not used ??? */ |
6eb5f6b9 | 2118 | PL_bostr = strbeg; |
3b0527fe | 2119 | reginfo.sv = sv; |
6eb5f6b9 JH |
2120 | |
2121 | /* Mark end of line for $ (and such) */ | |
2122 | PL_regeol = strend; | |
2123 | ||
2124 | /* see how far we have to get to not match where we matched before */ | |
3b0527fe | 2125 | reginfo.till = startpos+minend; |
6eb5f6b9 | 2126 | |
6eb5f6b9 JH |
2127 | /* If there is a "must appear" string, look for it. */ |
2128 | s = startpos; | |
2129 | ||
bbe252da | 2130 | if (prog->extflags & RXf_GPOS_SEEN) { /* Need to set reginfo->ganch */ |
6eb5f6b9 | 2131 | MAGIC *mg; |
2c296965 | 2132 | if (flags & REXEC_IGNOREPOS){ /* Means: check only at start */ |
58e23c8d | 2133 | reginfo.ganch = startpos + prog->gofs; |
2c296965 | 2134 | DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log, |
ed549f2e | 2135 | "GPOS IGNOREPOS: reginfo.ganch = startpos + %"UVxf"\n",(UV)prog->gofs)); |
2c296965 | 2136 | } else if (sv && SvTYPE(sv) >= SVt_PVMG |
6eb5f6b9 | 2137 | && SvMAGIC(sv) |
14befaf4 DM |
2138 | && (mg = mg_find(sv, PERL_MAGIC_regex_global)) |
2139 | && mg->mg_len >= 0) { | |
3b0527fe | 2140 | reginfo.ganch = strbeg + mg->mg_len; /* Defined pos() */ |
2c296965 | 2141 | DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log, |
ed549f2e | 2142 | "GPOS MAGIC: reginfo.ganch = strbeg + %"IVdf"\n",(IV)mg->mg_len)); |
2c296965 | 2143 | |
bbe252da | 2144 | if (prog->extflags & RXf_ANCH_GPOS) { |
3b0527fe | 2145 | if (s > reginfo.ganch) |
6eb5f6b9 | 2146 | goto phooey; |
58e23c8d | 2147 | s = reginfo.ganch - prog->gofs; |
2c296965 | 2148 | DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log, |
ed549f2e | 2149 | "GPOS ANCH_GPOS: s = ganch - %"UVxf"\n",(UV)prog->gofs)); |
c584a96e YO |
2150 | if (s < strbeg) |
2151 | goto phooey; | |
6eb5f6b9 JH |
2152 | } |
2153 | } | |
58e23c8d | 2154 | else if (data) { |
70685ca0 | 2155 | reginfo.ganch = strbeg + PTR2UV(data); |
2c296965 YO |
2156 | DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log, |
2157 | "GPOS DATA: reginfo.ganch= strbeg + %"UVxf"\n",PTR2UV(data))); | |
2158 | ||
2159 | } else { /* pos() not defined */ | |
3b0527fe | 2160 | reginfo.ganch = strbeg; |
2c296965 YO |
2161 | DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log, |
2162 | "GPOS: reginfo.ganch = strbeg\n")); | |
2163 | } | |
6eb5f6b9 | 2164 | } |
288b8c02 | 2165 | if (PL_curpm && (PM_GETRE(PL_curpm) == rx)) { |
e9105d30 GG |
2166 | /* We have to be careful. If the previous successful match |
2167 | was from this regex we don't want a subsequent partially | |
2168 | successful match to clobber the old results. | |
2169 | So when we detect this possibility we add a swap buffer | |
d8da0584 KW |
2170 | to the re, and switch the buffer each match. If we fail, |
2171 | we switch it back; otherwise we leave it swapped. | |
e9105d30 GG |
2172 | */ |
2173 | swap = prog->offs; | |
2174 | /* do we need a save destructor here for eval dies? */ | |
2175 | Newxz(prog->offs, (prog->nparens + 1), regexp_paren_pair); | |
495f47a5 DM |
2176 | DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log, |
2177 | "rex=0x%"UVxf" saving offs: orig=0x%"UVxf" new=0x%"UVxf"\n", | |
2178 | PTR2UV(prog), | |
2179 | PTR2UV(swap), | |
2180 | PTR2UV(prog->offs) | |
2181 | )); | |
c74340f9 | 2182 | } |
a0714e2c | 2183 | if (!(flags & REXEC_CHECKED) && (prog->check_substr != NULL || prog->check_utf8 != NULL)) { |
6eb5f6b9 JH |
2184 | re_scream_pos_data d; |
2185 | ||
2186 | d.scream_olds = &scream_olds; | |
2187 | d.scream_pos = &scream_pos; | |
288b8c02 | 2188 | s = re_intuit_start(rx, sv, s, strend, flags, &d); |
3fa9c3d7 | 2189 | if (!s) { |
a3621e74 | 2190 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not present...\n")); |
6eb5f6b9 | 2191 | goto phooey; /* not present */ |
3fa9c3d7 | 2192 | } |
6eb5f6b9 JH |
2193 | } |
2194 | ||
1de06328 | 2195 | |
6eb5f6b9 JH |
2196 | |
2197 | /* Simplest case: anchored match need be tried only once. */ | |
2198 | /* [unless only anchor is BOL and multiline is set] */ | |
bbe252da | 2199 | if (prog->extflags & (RXf_ANCH & ~RXf_ANCH_GPOS)) { |
24b23f37 | 2200 | if (s == startpos && regtry(®info, &startpos)) |
6eb5f6b9 | 2201 | goto got_it; |
bbe252da YO |
2202 | else if (multiline || (prog->intflags & PREGf_IMPLICIT) |
2203 | || (prog->extflags & RXf_ANCH_MBOL)) /* XXXX SBOL? */ | |
6eb5f6b9 JH |
2204 | { |
2205 | char *end; | |
2206 | ||
2207 | if (minlen) | |
2208 | dontbother = minlen - 1; | |
1aa99e6b | 2209 | end = HOP3c(strend, -dontbother, strbeg) - 1; |
6eb5f6b9 | 2210 | /* for multiline we only have to try after newlines */ |
33b8afdf | 2211 | if (prog->check_substr || prog->check_utf8) { |
92f3d482 YO |
2212 | /* because of the goto we can not easily reuse the macros for bifurcating the |
2213 | unicode/non-unicode match modes here like we do elsewhere - demerphq */ | |
2214 | if (utf8_target) { | |
2215 | if (s == startpos) | |
2216 | goto after_try_utf8; | |
2217 | while (1) { | |
2218 | if (regtry(®info, &s)) { | |
2219 | goto got_it; | |
2220 | } | |
2221 | after_try_utf8: | |
2222 | if (s > end) { | |
2223 | goto phooey; | |
2224 | } | |
2225 | if (prog->extflags & RXf_USE_INTUIT) { | |
2226 | s = re_intuit_start(rx, sv, s + UTF8SKIP(s), strend, flags, NULL); | |
2227 | if (!s) { | |
2228 | goto phooey; | |
2229 | } | |
2230 | } | |
2231 | else { | |
2232 | s += UTF8SKIP(s); | |
2233 | } | |
2234 | } | |
2235 | } /* end search for check string in unicode */ | |
2236 | else { | |
2237 | if (s == startpos) { | |
2238 | goto after_try_latin; | |
2239 | } | |
2240 | while (1) { | |
2241 | if (regtry(®info, &s)) { | |
2242 | goto got_it; | |
2243 | } | |
2244 | after_try_latin: | |
2245 | if (s > end) { | |
2246 | goto phooey; | |
2247 | } | |
2248 | if (prog->extflags & RXf_USE_INTUIT) { | |
2249 | s = re_intuit_start(rx, sv, s + 1, strend, flags, NULL); | |
2250 | if (!s) { | |
2251 | goto phooey; | |
2252 | } | |
2253 | } | |
2254 | else { | |
2255 | s++; | |
2256 | } | |
2257 | } | |
2258 | } /* end search for check string in latin*/ | |
2259 | } /* end search for check string */ | |
2260 | else { /* search for newline */ | |
2261 | if (s > startpos) { | |
2262 | /*XXX: The s-- is almost definitely wrong here under unicode - demeprhq*/ | |
6eb5f6b9 | 2263 | s--; |
92f3d482 | 2264 | } |
21eede78 YO |
2265 | /* We can use a more efficient search as newlines are the same in unicode as they are in latin */ |
2266 | while (s <= end) { /* note it could be possible to match at the end of the string */ | |
6eb5f6b9 | 2267 | if (*s++ == '\n') { /* don't need PL_utf8skip here */ |
24b23f37 | 2268 | if (regtry(®info, &s)) |
6eb5f6b9 JH |
2269 | goto got_it; |
2270 | } | |
92f3d482 YO |
2271 | } |
2272 | } /* end search for newline */ | |
2273 | } /* end anchored/multiline check string search */ | |
6eb5f6b9 | 2274 | goto phooey; |
bbe252da | 2275 | } else if (RXf_GPOS_CHECK == (prog->extflags & RXf_GPOS_CHECK)) |
f9f4320a | 2276 | { |
486ec47a | 2277 | /* the warning about reginfo.ganch being used without initialization |
bbe252da | 2278 | is bogus -- we set it above, when prog->extflags & RXf_GPOS_SEEN |
f9f4320a | 2279 | and we only enter this block when the same bit is set. */ |
58e23c8d | 2280 | char *tmp_s = reginfo.ganch - prog->gofs; |
c584a96e YO |
2281 | |
2282 | if (tmp_s >= strbeg && regtry(®info, &tmp_s)) | |
6eb5f6b9 JH |
2283 | goto got_it; |
2284 | goto phooey; | |
2285 | } | |
2286 | ||
2287 | /* Messy cases: unanchored match. */ | |
bbe252da | 2288 | if ((prog->anchored_substr || prog->anchored_utf8) && prog->intflags & PREGf_SKIP) { |
6eb5f6b9 | 2289 | /* we have /x+whatever/ */ |
984e6dd1 | 2290 | /* it must be a one character string (XXXX Except is_utf8_pat?) */ |
33b8afdf | 2291 | char ch; |
bf93d4cc GS |
2292 | #ifdef DEBUGGING |
2293 | int did_match = 0; | |
2294 | #endif | |
f2ed9b32 | 2295 | if (utf8_target) { |
7e0d5ad7 KW |
2296 | if (! prog->anchored_utf8) { |
2297 | to_utf8_substr(prog); | |
2298 | } | |
2299 | ch = SvPVX_const(prog->anchored_utf8)[0]; | |
4cadc6a9 | 2300 | REXEC_FBC_SCAN( |
6eb5f6b9 | 2301 | if (*s == ch) { |
a3621e74 | 2302 | DEBUG_EXECUTE_r( did_match = 1 ); |
24b23f37 | 2303 | if (regtry(®info, &s)) goto got_it; |
6eb5f6b9 JH |
2304 | s += UTF8SKIP(s); |
2305 | while (s < strend && *s == ch) | |
2306 | s += UTF8SKIP(s); | |
2307 | } | |
4cadc6a9 | 2308 | ); |
7e0d5ad7 | 2309 | |
6eb5f6b9 JH |
2310 | } |
2311 | else { | |
7e0d5ad7 KW |
2312 | if (! prog->anchored_substr) { |
2313 | if (! to_byte_substr(prog)) { | |
6b54ddc5 | 2314 | NON_UTF8_TARGET_BUT_UTF8_REQUIRED(phooey); |
7e0d5ad7 KW |
2315 | } |
2316 | } | |
2317 | ch = SvPVX_const(prog->anchored_substr)[0]; | |
4cadc6a9 | 2318 | REXEC_FBC_SCAN( |
6eb5f6b9 | 2319 | if (*s == ch) { |
a3621e74 | 2320 | DEBUG_EXECUTE_r( did_match = 1 ); |
24b23f37 | 2321 | if (regtry(®info, &s)) goto got_it; |
6eb5f6b9 JH |
2322 | s++; |
2323 | while (s < strend && *s == ch) | |
2324 | s++; | |
2325 | } | |
4cadc6a9 | 2326 | ); |
6eb5f6b9 | 2327 | } |
a3621e74 | 2328 | DEBUG_EXECUTE_r(if (!did_match) |
bf93d4cc | 2329 | PerlIO_printf(Perl_debug_log, |
b7953727 JH |
2330 | "Did not find anchored character...\n") |
2331 | ); | |
6eb5f6b9 | 2332 | } |
a0714e2c SS |
2333 | else if (prog->anchored_substr != NULL |
2334 | || prog->anchored_utf8 != NULL | |
2335 | || ((prog->float_substr != NULL || prog->float_utf8 != NULL) | |
33b8afdf JH |
2336 | && prog->float_max_offset < strend - s)) { |
2337 | SV *must; | |
2338 | I32 back_max; | |
2339 | I32 back_min; | |
2340 | char *last; | |
6eb5f6b9 | 2341 | char *last1; /* Last position checked before */ |
bf93d4cc GS |
2342 | #ifdef DEBUGGING |
2343 | int did_match = 0; | |
2344 | #endif | |
33b8afdf | 2345 | if (prog->anchored_substr || prog->anchored_utf8) { |
7e0d5ad7 KW |
2346 | if (utf8_target) { |
2347 | if (! prog->anchored_utf8) { | |
2348 | to_utf8_substr(prog); | |
2349 | } | |
2350 | must = prog->anchored_utf8; | |
2351 | } | |
2352 | else { | |
2353 | if (! prog->anchored_substr) { | |
2354 | if (! to_byte_substr(prog)) { | |
6b54ddc5 | 2355 | NON_UTF8_TARGET_BUT_UTF8_REQUIRED(phooey); |
7e0d5ad7 KW |
2356 | } |
2357 | } | |
2358 | must = prog->anchored_substr; | |
2359 | } | |
33b8afdf JH |
2360 | back_max = back_min = prog->anchored_offset; |
2361 | } else { | |
7e0d5ad7 KW |
2362 | if (utf8_target) { |
2363 | if (! prog->float_utf8) { | |
2364 | to_utf8_substr(prog); | |
2365 | } | |
2366 | must = prog->float_utf8; | |
2367 | } | |
2368 | else { | |
2369 | if (! prog->float_substr) { | |
2370 | if (! to_byte_substr(prog)) { | |
6b54ddc5 | 2371 | NON_UTF8_TARGET_BUT_UTF8_REQUIRED(phooey); |
7e0d5ad7 KW |
2372 | } |
2373 | } | |
2374 | must = prog->float_substr; | |
2375 | } | |
33b8afdf JH |
2376 | back_max = prog->float_max_offset; |
2377 | back_min = prog->float_min_offset; | |
2378 | } | |
1de06328 | 2379 | |
1de06328 YO |
2380 | if (back_min<0) { |
2381 | last = strend; | |
2382 | } else { | |
2383 | last = HOP3c(strend, /* Cannot start after this */ | |
2384 | -(I32)(CHR_SVLEN(must) | |
2385 | - (SvTAIL(must) != 0) + back_min), strbeg); | |
2386 | } | |
6eb5f6b9 JH |
2387 | if (s > PL_bostr) |
2388 | last1 = HOPc(s, -1); | |
2389 | else | |
2390 | last1 = s - 1; /* bogus */ | |
2391 | ||
a0288114 | 2392 | /* XXXX check_substr already used to find "s", can optimize if |
6eb5f6b9 JH |
2393 | check_substr==must. */ |
2394 | scream_pos = -1; | |
2395 | dontbother = end_shift; | |
2396 | strend = HOPc(strend, -dontbother); | |
2397 | while ( (s <= last) && | |
c33e64f0 | 2398 | (s = fbm_instr((unsigned char*)HOP3(s, back_min, (back_min<0 ? strbeg : strend)), |
9041c2e3 | 2399 | (unsigned char*)strend, must, |
c33e64f0 | 2400 | multiline ? FBMrf_MULTILINE : 0)) ) { |
a3621e74 | 2401 | DEBUG_EXECUTE_r( did_match = 1 ); |
6eb5f6b9 JH |
2402 | if (HOPc(s, -back_max) > last1) { |
2403 | last1 = HOPc(s, -back_min); | |
2404 | s = HOPc(s, -back_max); | |
2405 | } | |
2406 | else { | |
52657f30 | 2407 | char * const t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1; |
6eb5f6b9 JH |
2408 | |
2409 | last1 = HOPc(s, -back_min); | |
52657f30 | 2410 | s = t; |
6eb5f6b9 | 2411 | } |
f2ed9b32 | 2412 | if (utf8_target) { |
6eb5f6b9 | 2413 | while (s <= last1) { |
24b23f37 | 2414 | if (regtry(®info, &s)) |
6eb5f6b9 | 2415 | goto got_it; |
7016d6eb DM |
2416 | if (s >= last1) { |
2417 | s++; /* to break out of outer loop */ | |
2418 | break; | |
2419 | } | |
2420 | s += UTF8SKIP(s); | |
6eb5f6b9 JH |
2421 | } |
2422 | } | |
2423 | else { | |
2424 | while (s <= last1) { | |
24b23f37 | 2425 | if (regtry(®info, &s)) |
6eb5f6b9 JH |
2426 | goto got_it; |
2427 | s++; | |
2428 | } | |
2429 | } | |
2430 | } | |
ab3bbdeb | 2431 | DEBUG_EXECUTE_r(if (!did_match) { |
f2ed9b32 | 2432 | RE_PV_QUOTED_DECL(quoted, utf8_target, PERL_DEBUG_PAD_ZERO(0), |
ab3bbdeb YO |
2433 | SvPVX_const(must), RE_SV_DUMPLEN(must), 30); |
2434 | PerlIO_printf(Perl_debug_log, "Did not find %s substr %s%s...\n", | |
33b8afdf | 2435 | ((must == prog->anchored_substr || must == prog->anchored_utf8) |
bf93d4cc | 2436 | ? "anchored" : "floating"), |
ab3bbdeb YO |
2437 | quoted, RE_SV_TAIL(must)); |
2438 | }); | |
6eb5f6b9 JH |
2439 | goto phooey; |
2440 | } | |
f8fc2ecf | 2441 | else if ( (c = progi->regstclass) ) { |
f14c76ed | 2442 | if (minlen) { |
f8fc2ecf | 2443 | const OPCODE op = OP(progi->regstclass); |
66e933ab | 2444 | /* don't bother with what can't match */ |
786e8c11 | 2445 | if (PL_regkind[op] != EXACT && op != CANY && PL_regkind[op] != TRIE) |
f14c76ed RGS |
2446 | strend = HOPc(strend, -(minlen - 1)); |
2447 | } | |
a3621e74 | 2448 | DEBUG_EXECUTE_r({ |
be8e71aa | 2449 | SV * const prop = sv_newmortal(); |
32fc9b6a | 2450 | regprop(prog, prop, c); |
0df25f3d | 2451 | { |
f2ed9b32 | 2452 | RE_PV_QUOTED_DECL(quoted,utf8_target,PERL_DEBUG_PAD_ZERO(1), |
ab3bbdeb | 2453 | s,strend-s,60); |
0df25f3d | 2454 | PerlIO_printf(Perl_debug_log, |
1c8f8eb1 | 2455 | "Matching stclass %.*s against %s (%d bytes)\n", |
e4f74956 | 2456 | (int)SvCUR(prop), SvPVX_const(prop), |
ab3bbdeb | 2457 | quoted, (int)(strend - s)); |
0df25f3d | 2458 | } |
ffc61ed2 | 2459 | }); |
984e6dd1 | 2460 | if (find_byclass(prog, c, s, strend, ®info, reginfo.is_utf8_pat)) |
6eb5f6b9 | 2461 | goto got_it; |
07be1b83 | 2462 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass... [regexec_flags]\n")); |
d6a28714 JH |
2463 | } |
2464 | else { | |
2465 | dontbother = 0; | |
a0714e2c | 2466 | if (prog->float_substr != NULL || prog->float_utf8 != NULL) { |
33b8afdf | 2467 | /* Trim the end. */ |
6af40bd7 | 2468 | char *last= NULL; |
33b8afdf | 2469 | SV* float_real; |
c33e64f0 FC |
2470 | STRLEN len; |
2471 | const char *little; | |
33b8afdf | 2472 | |
7e0d5ad7 KW |
2473 | if (utf8_target) { |
2474 | if (! prog->float_utf8) { | |
2475 | to_utf8_substr(prog); | |
2476 | } | |
2477 | float_real = prog->float_utf8; | |
2478 | } | |
2479 | else { | |
2480 | if (! prog->float_substr) { | |
2481 | if (! to_byte_substr(prog)) { | |
6b54ddc5 | 2482 | NON_UTF8_TARGET_BUT_UTF8_REQUIRED(phooey); |
7e0d5ad7 KW |
2483 | } |
2484 | } | |
2485 | float_real = prog->float_substr; | |
2486 | } | |
d6a28714 | 2487 | |
c33e64f0 FC |
2488 | little = SvPV_const(float_real, len); |
2489 | if (SvTAIL(float_real)) { | |
7f18ad16 KW |
2490 | /* This means that float_real contains an artificial \n on |
2491 | * the end due to the presence of something like this: | |
2492 | * /foo$/ where we can match both "foo" and "foo\n" at the | |
2493 | * end of the string. So we have to compare the end of the | |
2494 | * string first against the float_real without the \n and | |
2495 | * then against the full float_real with the string. We | |
2496 | * have to watch out for cases where the string might be | |
2497 | * smaller than the float_real or the float_real without | |
2498 | * the \n. */ | |
1a13b075 YO |
2499 | char *checkpos= strend - len; |
2500 | DEBUG_OPTIMISE_r( | |
2501 | PerlIO_printf(Perl_debug_log, | |
2502 | "%sChecking for float_real.%s\n", | |
2503 | PL_colors[4], PL_colors[5])); | |
2504 | if (checkpos + 1 < strbeg) { | |
7f18ad16 KW |
2505 | /* can't match, even if we remove the trailing \n |
2506 | * string is too short to match */ | |
1a13b075 YO |
2507 | DEBUG_EXECUTE_r( |
2508 | PerlIO_printf(Perl_debug_log, | |
2509 | "%sString shorter than required trailing substring, cannot match.%s\n", | |
2510 | PL_colors[4], PL_colors[5])); | |
2511 | goto phooey; | |
2512 | } else if (memEQ(checkpos + 1, little, len - 1)) { | |
7f18ad16 KW |
2513 | /* can match, the end of the string matches without the |
2514 | * "\n" */ | |
1a13b075 YO |
2515 | last = checkpos + 1; |
2516 | } else if (checkpos < strbeg) { | |
7f18ad16 KW |
2517 | /* cant match, string is too short when the "\n" is |
2518 | * included */ | |
1a13b075 YO |
2519 | DEBUG_EXECUTE_r( |
2520 | PerlIO_printf(Perl_debug_log, | |
2521 | "%sString does not contain required trailing substring, cannot match.%s\n", | |
2522 | PL_colors[4], PL_colors[5])); | |
2523 | goto phooey; | |
2524 | } else if (!multiline) { | |
7f18ad16 KW |
2525 | /* non multiline match, so compare with the "\n" at the |
2526 | * end of the string */ | |
1a13b075 YO |
2527 | if (memEQ(checkpos, little, len)) { |
2528 | last= checkpos; | |
2529 | } else { | |
2530 | DEBUG_EXECUTE_r( | |
2531 | PerlIO_printf(Perl_debug_log, | |
2532 | "%sString does not contain required trailing substring, cannot match.%s\n", | |
2533 | PL_colors[4], PL_colors[5])); | |
2534 | goto phooey; | |
2535 | } | |
2536 | } else { | |
7f18ad16 KW |
2537 | /* multiline match, so we have to search for a place |
2538 | * where the full string is located */ | |
d6a28714 | 2539 | goto find_last; |
1a13b075 | 2540 | } |
c33e64f0 | 2541 | } else { |
d6a28714 | 2542 | find_last: |
9041c2e3 | 2543 | if (len) |
d6a28714 | 2544 | last = rninstr(s, strend, little, little + len); |
b8c5462f | 2545 | else |
a0288114 | 2546 | last = strend; /* matching "$" */ |
b8c5462f | 2547 | } |
6af40bd7 | 2548 | if (!last) { |
7f18ad16 KW |
2549 | /* at one point this block contained a comment which was |
2550 | * probably incorrect, which said that this was a "should not | |
2551 | * happen" case. Even if it was true when it was written I am | |
2552 | * pretty sure it is not anymore, so I have removed the comment | |
2553 | * and replaced it with this one. Yves */ | |
6bda09f9 YO |
2554 | DEBUG_EXECUTE_r( |
2555 | PerlIO_printf(Perl_debug_log, | |
6af40bd7 YO |
2556 | "String does not contain required substring, cannot match.\n" |
2557 | )); | |
2558 | goto phooey; | |
bf93d4cc | 2559 | } |
d6a28714 JH |
2560 | dontbother = strend - last + prog->float_min_offset; |
2561 | } | |
2562 | if (minlen && (dontbother < minlen)) | |
2563 | dontbother = minlen - 1; | |
2564 | strend -= dontbother; /* this one's always in bytes! */ | |
2565 | /* We don't know much -- general case. */ | |
f2ed9b32 | 2566 | if (utf8_target) { |
d6a28714 | 2567 | for (;;) { |
24b23f37 | 2568 | if (regtry(®info, &s)) |
d6a28714 JH |
2569 | goto got_it; |
2570 | if (s >= strend) | |
2571 | break; | |
b8c5462f | 2572 | s += UTF8SKIP(s); |
d6a28714 JH |
2573 | }; |
2574 | } | |
2575 | else { | |
2576 | do { | |
24b23f37 | 2577 | if (regtry(®info, &s)) |
d6a28714 JH |
2578 | goto got_it; |
2579 | } while (s++ < strend); | |
2580 | } | |
2581 | } | |
2582 | ||
2583 | /* Failure. */ | |
2584 | goto phooey; | |
2585 | ||
2586 | got_it: | |
495f47a5 DM |
2587 | DEBUG_BUFFERS_r( |
2588 | if (swap) | |
2589 | PerlIO_printf(Perl_debug_log, | |
2590 | "rex=0x%"UVxf" freeing offs: 0x%"UVxf"\n", | |
2591 | PTR2UV(prog), | |
2592 | PTR2UV(swap) | |
2593 | ); | |
2594 | ); | |
e9105d30 | 2595 | Safefree(swap); |
d6a28714 | 2596 | |
ed301438 | 2597 | if (PL_reg_state.re_state_eval_setup_done) |
4f639d21 | 2598 | restore_pos(aTHX_ prog); |
5daac39c NC |
2599 | if (RXp_PAREN_NAMES(prog)) |
2600 | (void)hv_iterinit(RXp_PAREN_NAMES(prog)); | |
d6a28714 JH |
2601 | |
2602 | /* make sure $`, $&, $', and $digit will work later */ | |
2603 | if ( !(flags & REXEC_NOT_FIRST) ) { | |
d6a28714 | 2604 | if (flags & REXEC_COPY_STR) { |
db2c6cb3 FC |
2605 | #ifdef PERL_ANY_COW |
2606 | if (SvCANCOW(sv)) { | |
ed252734 NC |
2607 | if (DEBUG_C_TEST) { |
2608 | PerlIO_printf(Perl_debug_log, | |
2609 | "Copy on write: regexp capture, type %d\n", | |
2610 | (int) SvTYPE(sv)); | |
2611 | } | |
77f8f7c1 | 2612 | RX_MATCH_COPY_FREE(rx); |
ed252734 | 2613 | prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv); |
d5263905 | 2614 | prog->subbeg = (char *)SvPVX_const(prog->saved_copy); |
ed252734 | 2615 | assert (SvPOKp(prog->saved_copy)); |
6502e081 DM |
2616 | prog->sublen = PL_regeol - strbeg; |
2617 | prog->suboffset = 0; | |
2618 | prog->subcoffset = 0; | |
ed252734 NC |
2619 | } else |
2620 | #endif | |
2621 | { | |
6502e081 DM |
2622 | I32 min = 0; |
2623 | I32 max = PL_regeol - strbeg; | |
2624 | I32 sublen; | |
2625 | ||
2626 | if ( (flags & REXEC_COPY_SKIP_POST) | |
2627 | && !(RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) /* //p */ | |
2628 | && !(PL_sawampersand & SAWAMPERSAND_RIGHT) | |
2629 | ) { /* don't copy $' part of string */ | |
3de645a8 | 2630 | U32 n = 0; |
6502e081 DM |
2631 | max = -1; |
2632 | /* calculate the right-most part of the string covered | |
2633 | * by a capture. Due to look-ahead, this may be to | |
2634 | * the right of $&, so we have to scan all captures */ | |
2635 | while (n <= prog->lastparen) { | |
2636 | if (prog->offs[n].end > max) | |
2637 | max = prog->offs[n].end; | |
2638 | n++; | |
2639 | } | |
2640 | if (max == -1) | |
2641 | max = (PL_sawampersand & SAWAMPERSAND_LEFT) | |
2642 | ? prog->offs[0].start | |
2643 | : 0; | |
2644 | assert(max >= 0 && max <= PL_regeol - strbeg); | |
2645 | } | |
2646 | ||
2647 | if ( (flags & REXEC_COPY_SKIP_PRE) | |
2648 | && !(RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) /* //p */ | |
2649 | && !(PL_sawampersand & SAWAMPERSAND_LEFT) | |
2650 | ) { /* don't copy $` part of string */ | |
3de645a8 | 2651 | U32 n = 0; |
6502e081 DM |
2652 | min = max; |
2653 | /* calculate the left-most part of the string covered | |
2654 | * by a capture. Due to look-behind, this may be to | |
2655 | * the left of $&, so we have to scan all captures */ | |
2656 | while (min && n <= prog->lastparen) { | |
2657 | if ( prog->offs[n].start != -1 | |
2658 | && prog->offs[n].start < min) | |
2659 | { | |
2660 | min = prog->offs[n].start; | |
2661 | } | |
2662 | n++; | |
2663 | } | |
2664 | if ((PL_sawampersand & SAWAMPERSAND_RIGHT) | |
2665 | && min > prog->offs[0].end | |
2666 | ) | |
2667 | min = prog->offs[0].end; | |
2668 | ||
2669 | } | |
2670 | ||
2671 | assert(min >= 0 && min <= max && min <= PL_regeol - strbeg); | |
2672 | sublen = max - min; | |
2673 | ||
2674 | if (RX_MATCH_COPIED(rx)) { | |
2675 | if (sublen > prog->sublen) | |
2676 | prog->subbeg = | |
2677 | (char*)saferealloc(prog->subbeg, sublen+1); | |
2678 | } | |
2679 | else | |
2680 | prog->subbeg = (char*)safemalloc(sublen+1); | |
2681 | Copy(strbeg + min, prog->subbeg, sublen, char); | |
2682 | prog->subbeg[sublen] = '\0'; | |
2683 | prog->suboffset = min; | |
2684 | prog->sublen = sublen; | |
77f8f7c1 | 2685 | RX_MATCH_COPIED_on(rx); |
6502e081 | 2686 | } |
6502e081 DM |
2687 | prog->subcoffset = prog->suboffset; |
2688 | if (prog->suboffset && utf8_target) { | |
2689 | /* Convert byte offset to chars. | |
2690 | * XXX ideally should only compute this if @-/@+ | |
2691 | * has been seen, a la PL_sawampersand ??? */ | |
2692 | ||
2693 | /* If there's a direct correspondence between the | |
2694 | * string which we're matching and the original SV, | |
2695 | * then we can use the utf8 len cache associated with | |
2696 | * the SV. In particular, it means that under //g, | |
2697 | * sv_pos_b2u() will use the previously cached | |
2698 | * position to speed up working out the new length of | |
2699 | * subcoffset, rather than counting from the start of | |
2700 | * the string each time. This stops | |
2701 | * $x = "\x{100}" x 1E6; 1 while $x =~ /(.)/g; | |
2702 | * from going quadratic */ | |
2703 | if (SvPOKp(sv) && SvPVX(sv) == strbeg) | |
2704 | sv_pos_b2u(sv, &(prog->subcoffset)); | |
2705 | else | |
2706 | prog->subcoffset = utf8_length((U8*)strbeg, | |
2707 | (U8*)(strbeg+prog->suboffset)); | |
2708 | } | |
d6a28714 JH |
2709 | } |
2710 | else { | |
6502e081 | 2711 | RX_MATCH_COPY_FREE(rx); |
d6a28714 | 2712 | prog->subbeg = strbeg; |
6502e081 DM |
2713 | prog->suboffset = 0; |
2714 | prog->subcoffset = 0; | |
d6a28714 JH |
2715 | prog->sublen = PL_regeol - strbeg; /* strend may have been modified */ |
2716 | } | |
2717 | } | |
9041c2e3 | 2718 | |
d6a28714 JH |
2719 | return 1; |
2720 | ||
2721 | phooey: | |
a3621e74 | 2722 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n", |
e4584336 | 2723 | PL_colors[4], PL_colors[5])); |
ed301438 | 2724 | if (PL_reg_state.re_state_eval_setup_done) |
4f639d21 | 2725 | restore_pos(aTHX_ prog); |
e9105d30 | 2726 | if (swap) { |
c74340f9 | 2727 | /* we failed :-( roll it back */ |
495f47a5 DM |
2728 | DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log, |
2729 | "rex=0x%"UVxf" rolling back offs: freeing=0x%"UVxf" restoring=0x%"UVxf"\n", | |
2730 | PTR2UV(prog), | |
2731 | PTR2UV(prog->offs), | |
2732 | PTR2UV(swap) | |
2733 | )); | |
e9105d30 GG |
2734 | Safefree(prog->offs); |
2735 | prog->offs = swap; | |
2736 | } | |
d6a28714 JH |
2737 | return 0; |
2738 | } | |
2739 | ||
6bda09f9 | 2740 | |
ec43f78b DM |
2741 | /* Set which rex is pointed to by PL_reg_state, handling ref counting. |
2742 | * Do inc before dec, in case old and new rex are the same */ | |
2743 | #define SET_reg_curpm(Re2) \ | |
2744 | if (PL_reg_state.re_state_eval_setup_done) { \ | |
2745 | (void)ReREFCNT_inc(Re2); \ | |
2746 | ReREFCNT_dec(PM_GETRE(PL_reg_curpm)); \ | |
2747 | PM_SETRE((PL_reg_curpm), (Re2)); \ | |
2748 | } | |
2749 | ||
2750 | ||
d6a28714 JH |
2751 | /* |
2752 | - regtry - try match at specific point | |
2753 | */ | |
2754 | STATIC I32 /* 0 failure, 1 success */ | |
f73aaa43 | 2755 | S_regtry(pTHX_ regmatch_info *reginfo, char **startposp) |
d6a28714 | 2756 | { |
97aff369 | 2757 | dVAR; |
d6a28714 | 2758 | CHECKPOINT lastcp; |
288b8c02 | 2759 | REGEXP *const rx = reginfo->prog; |
8d919b0a | 2760 | regexp *const prog = ReANY(rx); |
f73aaa43 | 2761 | I32 result; |
f8fc2ecf | 2762 | RXi_GET_DECL(prog,progi); |
a3621e74 | 2763 | GET_RE_DEBUG_FLAGS_DECL; |
7918f24d NC |
2764 | |
2765 | PERL_ARGS_ASSERT_REGTRY; | |
2766 | ||
24b23f37 | 2767 | reginfo->cutpoint=NULL; |
d6a28714 | 2768 | |
ed301438 DM |
2769 | if ((prog->extflags & RXf_EVAL_SEEN) |
2770 | && !PL_reg_state.re_state_eval_setup_done) | |
2771 | { | |
d6a28714 JH |
2772 | MAGIC *mg; |
2773 | ||
ed301438 | 2774 | PL_reg_state.re_state_eval_setup_done = TRUE; |
3b0527fe | 2775 | if (reginfo->sv) { |
d6a28714 | 2776 | /* Make $_ available to executed code. */ |
3b0527fe | 2777 | if (reginfo->sv != DEFSV) { |
59f00321 | 2778 | SAVE_DEFSV; |
414bf5ae | 2779 | DEFSV_set(reginfo->sv); |
b8c5462f | 2780 | } |
d6a28714 | 2781 | |
3b0527fe DM |
2782 | if (!(SvTYPE(reginfo->sv) >= SVt_PVMG && SvMAGIC(reginfo->sv) |
2783 | && (mg = mg_find(reginfo->sv, PERL_MAGIC_regex_global)))) { | |
d6a28714 | 2784 | /* prepare for quick setting of pos */ |
d300d9fa | 2785 | #ifdef PERL_OLD_COPY_ON_WRITE |
51a9ea20 NC |
2786 | if (SvIsCOW(reginfo->sv)) |
2787 | sv_force_normal_flags(reginfo->sv, 0); | |
d300d9fa | 2788 | #endif |
3dab1dad | 2789 | mg = sv_magicext(reginfo->sv, NULL, PERL_MAGIC_regex_global, |
d300d9fa | 2790 | &PL_vtbl_mglob, NULL, 0); |
d6a28714 | 2791 | mg->mg_len = -1; |
b8c5462f | 2792 | } |
d6a28714 JH |
2793 | PL_reg_magic = mg; |
2794 | PL_reg_oldpos = mg->mg_len; | |
4f639d21 | 2795 | SAVEDESTRUCTOR_X(restore_pos, prog); |
d6a28714 | 2796 | } |
09687e5a | 2797 | if (!PL_reg_curpm) { |
a02a5408 | 2798 | Newxz(PL_reg_curpm, 1, PMOP); |
09687e5a AB |
2799 | #ifdef USE_ITHREADS |
2800 | { | |
14a49a24 | 2801 | SV* const repointer = &PL_sv_undef; |
92313705 NC |
2802 | /* this regexp is also owned by the new PL_reg_curpm, which |
2803 | will try to free it. */ | |
d2ece331 | 2804 | av_push(PL_regex_padav, repointer); |
09687e5a AB |
2805 | PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav); |
2806 | PL_regex_pad = AvARRAY(PL_regex_padav); | |
2807 | } | |
2808 | #endif | |
2809 | } | |
ec43f78b | 2810 | SET_reg_curpm(rx); |
d6a28714 JH |
2811 | PL_reg_oldcurpm = PL_curpm; |
2812 | PL_curpm = PL_reg_curpm; | |
07bc277f | 2813 | if (RXp_MATCH_COPIED(prog)) { |
d6a28714 JH |
2814 | /* Here is a serious problem: we cannot rewrite subbeg, |
2815 | since it may be needed if this match fails. Thus | |
2816 | $` inside (?{}) could fail... */ | |
2817 | PL_reg_oldsaved = prog->subbeg; | |
2818 | PL_reg_oldsavedlen = prog->sublen; | |
6502e081 DM |
2819 | PL_reg_oldsavedoffset = prog->suboffset; |
2820 | PL_reg_oldsavedcoffset = prog->suboffset; | |
db2c6cb3 | 2821 | #ifdef PERL_ANY_COW |
ed252734 NC |
2822 | PL_nrs = prog->saved_copy; |
2823 | #endif | |
07bc277f | 2824 | RXp_MATCH_COPIED_off(prog); |
d6a28714 JH |
2825 | } |
2826 | else | |
bd61b366 | 2827 | PL_reg_oldsaved = NULL; |
d6a28714 | 2828 | prog->subbeg = PL_bostr; |
6502e081 DM |
2829 | prog->suboffset = 0; |
2830 | prog->subcoffset = 0; | |
d6a28714 JH |
2831 | prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */ |
2832 | } | |
97ca13b7 | 2833 | #ifdef DEBUGGING |
f73aaa43 | 2834 | PL_reg_starttry = *startposp; |
97ca13b7 | 2835 | #endif |
f73aaa43 | 2836 | prog->offs[0].start = *startposp - PL_bostr; |
d6a28714 | 2837 | prog->lastparen = 0; |
03994de8 | 2838 | prog->lastcloseparen = 0; |
d6a28714 JH |
2839 | |
2840 | /* XXXX What this code is doing here?!!! There should be no need | |
b93070ed | 2841 | to do this again and again, prog->lastparen should take care of |
3dd2943c | 2842 | this! --ilya*/ |
dafc8851 JH |
2843 | |
2844 | /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code. | |
2845 | * Actually, the code in regcppop() (which Ilya may be meaning by | |
b93070ed | 2846 | * prog->lastparen), is not needed at all by the test suite |
225593e1 DM |
2847 | * (op/regexp, op/pat, op/split), but that code is needed otherwise |
2848 | * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/ | |
2849 | * Meanwhile, this code *is* needed for the | |
daf18116 JH |
2850 | * above-mentioned test suite tests to succeed. The common theme |
2851 | * on those tests seems to be returning null fields from matches. | |
225593e1 | 2852 | * --jhi updated by dapm */ |
dafc8851 | 2853 | #if 1 |
d6a28714 | 2854 | if (prog->nparens) { |
b93070ed | 2855 | regexp_paren_pair *pp = prog->offs; |
eb578fdb | 2856 | I32 i; |
b93070ed | 2857 | for (i = prog->nparens; i > (I32)prog->lastparen; i--) { |
f0ab9afb NC |
2858 | ++pp; |
2859 | pp->start = -1; | |
2860 | pp->end = -1; | |
d6a28714 JH |
2861 | } |
2862 | } | |
dafc8851 | 2863 | #endif |
02db2b7b | 2864 | REGCP_SET(lastcp); |
f73aaa43 DM |
2865 | result = regmatch(reginfo, *startposp, progi->program + 1); |
2866 | if (result != -1) { | |
2867 | prog->offs[0].end = result; | |
d6a28714 JH |
2868 | return 1; |
2869 | } | |
24b23f37 | 2870 | if (reginfo->cutpoint) |
f73aaa43 | 2871 | *startposp= reginfo->cutpoint; |
02db2b7b | 2872 | REGCP_UNWIND(lastcp); |
d6a28714 JH |
2873 | return 0; |
2874 | } | |
2875 | ||
02db2b7b | 2876 | |
8ba1375e MJD |
2877 | #define sayYES goto yes |
2878 | #define sayNO goto no | |
262b90c4 | 2879 | #define sayNO_SILENT goto no_silent |
8ba1375e | 2880 | |
f9f4320a YO |
2881 | /* we dont use STMT_START/END here because it leads to |
2882 | "unreachable code" warnings, which are bogus, but distracting. */ | |
2883 | #define CACHEsayNO \ | |
c476f425 DM |
2884 | if (ST.cache_mask) \ |
2885 | PL_reg_poscache[ST.cache_offset] |= ST.cache_mask; \ | |
f9f4320a | 2886 | sayNO |
3298f257 | 2887 | |
a3621e74 | 2888 | /* this is used to determine how far from the left messages like |
265c4333 YO |
2889 | 'failed...' are printed. It should be set such that messages |
2890 | are inline with the regop output that created them. | |
a3621e74 | 2891 | */ |
265c4333 | 2892 | #define REPORT_CODE_OFF 32 |
a3621e74 YO |
2893 | |
2894 | ||
40a82448 DM |
2895 | #define CHRTEST_UNINIT -1001 /* c1/c2 haven't been calculated yet */ |
2896 | #define CHRTEST_VOID -1000 /* the c1/c2 "next char" test should be skipped */ | |
79a2a0e8 KW |
2897 | #define CHRTEST_NOT_A_CP_1 -999 |
2898 | #define CHRTEST_NOT_A_CP_2 -998 | |
9e137952 | 2899 | |
86545054 DM |
2900 | #define SLAB_FIRST(s) (&(s)->states[0]) |
2901 | #define SLAB_LAST(s) (&(s)->states[PERL_REGMATCH_SLAB_SLOTS-1]) | |
2902 | ||
5d9a96ca DM |
2903 | /* grab a new slab and return the first slot in it */ |
2904 | ||
2905 | STATIC regmatch_state * | |
2906 | S_push_slab(pTHX) | |
2907 | { | |
a35a87e7 | 2908 | #if PERL_VERSION < 9 && !defined(PERL_CORE) |
54df2634 NC |
2909 | dMY_CXT; |
2910 | #endif | |
5d9a96ca DM |
2911 | regmatch_slab *s = PL_regmatch_slab->next; |
2912 | if (!s) { | |
2913 | Newx(s, 1, regmatch_slab); | |
2914 | s->prev = PL_regmatch_slab; | |
2915 | s->next = NULL; | |
2916 | PL_regmatch_slab->next = s; | |
2917 | } | |
2918 | PL_regmatch_slab = s; | |
86545054 | 2919 | return SLAB_FIRST(s); |
5d9a96ca | 2920 | } |
5b47454d | 2921 | |
95b24440 | 2922 | |
40a82448 DM |
2923 | /* push a new state then goto it */ |
2924 | ||
4d5016e5 DM |
2925 | #define PUSH_STATE_GOTO(state, node, input) \ |
2926 | pushinput = input; \ | |
40a82448 DM |
2927 | scan = node; \ |
2928 | st->resume_state = state; \ | |
2929 | goto push_state; | |
2930 | ||
2931 | /* push a new state with success backtracking, then goto it */ | |
2932 | ||
4d5016e5 DM |
2933 | #define PUSH_YES_STATE_GOTO(state, node, input) \ |
2934 | pushinput = input; \ | |
40a82448 DM |
2935 | scan = node; \ |
2936 | st->resume_state = state; \ | |
2937 | goto push_yes_state; | |
2938 | ||
aa283a38 | 2939 | |
aa283a38 | 2940 | |
4d5016e5 | 2941 | |
d6a28714 | 2942 | /* |
95b24440 | 2943 | |
bf1f174e DM |
2944 | regmatch() - main matching routine |
2945 | ||
2946 | This is basically one big switch statement in a loop. We execute an op, | |
2947 | set 'next' to point the next op, and continue. If we come to a point which | |
2948 | we may need to backtrack to on failure such as (A|B|C), we push a | |
2949 | backtrack state onto the backtrack stack. On failure, we pop the top | |
2950 | state, and re-enter the loop at the state indicated. If there are no more | |
2951 | states to pop, we return failure. | |
2952 | ||
2953 | Sometimes we also need to backtrack on success; for example /A+/, where | |
2954 | after successfully matching one A, we need to go back and try to | |
2955 | match another one; similarly for lookahead assertions: if the assertion | |
2956 | completes successfully, we backtrack to the state just before the assertion | |
2957 | and then carry on. In these cases, the pushed state is marked as | |
2958 | 'backtrack on success too'. This marking is in fact done by a chain of | |
2959 | pointers, each pointing to the previous 'yes' state. On success, we pop to | |
2960 | the nearest yes state, discarding any intermediate failure-only states. | |
2961 | Sometimes a yes state is pushed just to force some cleanup code to be | |
2962 | called at the end of a successful match or submatch; e.g. (??{$re}) uses | |
2963 | it to free the inner regex. | |
2964 | ||
2965 | Note that failure backtracking rewinds the cursor position, while | |
2966 | success backtracking leaves it alone. | |
2967 | ||
2968 | A pattern is complete when the END op is executed, while a subpattern | |
2969 | such as (?=foo) is complete when the SUCCESS op is executed. Both of these | |
2970 | ops trigger the "pop to last yes state if any, otherwise return true" | |
2971 | behaviour. | |
2972 | ||
2973 | A common convention in this function is to use A and B to refer to the two | |
2974 | subpatterns (or to the first nodes thereof) in patterns like /A*B/: so A is | |
2975 | the subpattern to be matched possibly multiple times, while B is the entire | |
2976 | rest of the pattern. Variable and state names reflect this convention. | |
2977 | ||
2978 | The states in the main switch are the union of ops and failure/success of | |
2979 | substates associated with with that op. For example, IFMATCH is the op | |
2980 | that does lookahead assertions /(?=A)B/ and so the IFMATCH state means | |
2981 | 'execute IFMATCH'; while IFMATCH_A is a state saying that we have just | |
2982 | successfully matched A and IFMATCH_A_fail is a state saying that we have | |
2983 | just failed to match A. Resume states always come in pairs. The backtrack | |
2984 | state we push is marked as 'IFMATCH_A', but when that is popped, we resume | |
2985 | at IFMATCH_A or IFMATCH_A_fail, depending on whether we are backtracking | |
2986 | on success or failure. | |
2987 | ||
2988 | The struct that holds a backtracking state is actually a big union, with | |
2989 | one variant for each major type of op. The variable st points to the | |
2990 | top-most backtrack struct. To make the code clearer, within each | |
2991 | block of code we #define ST to alias the relevant union. | |
2992 | ||
2993 | Here's a concrete example of a (vastly oversimplified) IFMATCH | |
2994 | implementation: | |
2995 | ||
2996 | switch (state) { | |
2997 | .... | |
2998 | ||
2999 | #define ST st->u.ifmatch | |
3000 | ||
3001 | case IFMATCH: // we are executing the IFMATCH op, (?=A)B | |
3002 | ST.foo = ...; // some state we wish to save | |
95b24440 | 3003 | ... |
bf1f174e DM |
3004 | // push a yes backtrack state with a resume value of |
3005 | // IFMATCH_A/IFMATCH_A_fail, then continue execution at the | |
3006 | // first node of A: | |
4d5016e5 | 3007 | PUSH_YES_STATE_GOTO(IFMATCH_A, A, newinput); |
bf1f174e DM |
3008 | // NOTREACHED |
3009 | ||
3010 | case IFMATCH_A: // we have successfully executed A; now continue with B | |
3011 | next = B; | |
3012 | bar = ST.foo; // do something with the preserved value | |
3013 | break; | |
3014 | ||
3015 | case IFMATCH_A_fail: // A failed, so the assertion failed | |
3016 | ...; // do some housekeeping, then ... | |
3017 | sayNO; // propagate the failure | |
3018 | ||
3019 | #undef ST | |
95b24440 | 3020 | |
bf1f174e DM |
3021 | ... |
3022 | } | |
95b24440 | 3023 | |
bf1f174e DM |
3024 | For any old-timers reading this who are familiar with the old recursive |
3025 | approach, the code above is equivalent to: | |
95b24440 | 3026 | |
bf1f174e DM |
3027 | case IFMATCH: // we are executing the IFMATCH op, (?=A)B |
3028 | { | |
3029 | int foo = ... | |
95b24440 | 3030 | ... |
bf1f174e DM |
3031 | if (regmatch(A)) { |
3032 | next = B; | |
3033 | bar = foo; | |
3034 | break; | |
95b24440 | 3035 | } |
bf1f174e DM |
3036 | ...; // do some housekeeping, then ... |
3037 | sayNO; // propagate the failure | |
95b24440 | 3038 | } |
bf1f174e DM |
3039 | |
3040 | The topmost backtrack state, pointed to by st, is usually free. If you | |
3041 | want to claim it, populate any ST.foo fields in it with values you wish to | |
3042 | save, then do one of | |
3043 | ||
4d5016e5 DM |
3044 | PUSH_STATE_GOTO(resume_state, node, newinput); |
3045 | PUSH_YES_STATE_GOTO(resume_state, node, newinput); | |
bf1f174e DM |
3046 | |
3047 | which sets that backtrack state's resume value to 'resume_state', pushes a | |
3048 | new free entry to the top of the backtrack stack, then goes to 'node'. | |
3049 | On backtracking, the free slot is popped, and the saved state becomes the | |
3050 | new free state. An ST.foo field in this new top state can be temporarily | |
3051 | accessed to retrieve values, but once the main loop is re-entered, it | |
3052 | becomes available for reuse. | |
3053 | ||
3054 | Note that the depth of the backtrack stack constantly increases during the | |
3055 | left-to-right execution of the pattern, rather than going up and down with | |
3056 | the pattern nesting. For example the stack is at its maximum at Z at the | |
3057 | end of the pattern, rather than at X in the following: | |
3058 | ||
3059 | /(((X)+)+)+....(Y)+....Z/ | |
3060 | ||
3061 | The only exceptions to this are lookahead/behind assertions and the cut, | |
3062 | (?>A), which pop all the backtrack states associated with A before | |
3063 | continuing. | |
3064 | ||
486ec47a | 3065 | Backtrack state structs are allocated in slabs of about 4K in size. |
bf1f174e DM |
3066 | PL_regmatch_state and st always point to the currently active state, |
3067 | and PL_regmatch_slab points to the slab currently containing | |
3068 | PL_regmatch_state. The first time regmatch() is called, the first slab is | |
3069 | allocated, and is never freed until interpreter destruction. When the slab | |
3070 | is full, a new one is allocated and chained to the end. At exit from | |
3071 | regmatch(), slabs allocated since entry are freed. | |
3072 | ||
3073 | */ | |
95b24440 | 3074 | |
40a82448 | 3075 | |
5bc10b2c | 3076 | #define DEBUG_STATE_pp(pp) \ |
265c4333 | 3077 | DEBUG_STATE_r({ \ |
f2ed9b32 | 3078 | DUMP_EXEC_POS(locinput, scan, utf8_target); \ |
5bc10b2c | 3079 | PerlIO_printf(Perl_debug_log, \ |
5d458dd8 | 3080 | " %*s"pp" %s%s%s%s%s\n", \ |
5bc10b2c | 3081 | depth*2, "", \ |
13d6edb4 | 3082 | PL_reg_name[st->resume_state], \ |
5d458dd8 YO |
3083 | ((st==yes_state||st==mark_state) ? "[" : ""), \ |
3084 | ((st==yes_state) ? "Y" : ""), \ | |
3085 | ((st==mark_state) ? "M" : ""), \ | |
3086 | ((st==yes_state||st==mark_state) ? "]" : "") \ | |
3087 | ); \ | |
265c4333 | 3088 | }); |
5bc10b2c | 3089 | |
40a82448 | 3090 | |
3dab1dad | 3091 | #define REG_NODE_NUM(x) ((x) ? (int)((x)-prog) : -1) |
95b24440 | 3092 | |
3df15adc | 3093 | #ifdef DEBUGGING |
5bc10b2c | 3094 | |
ab3bbdeb | 3095 | STATIC void |
f2ed9b32 | 3096 | S_debug_start_match(pTHX_ const REGEXP *prog, const bool utf8_target, |
ab3bbdeb YO |
3097 | const char *start, const char *end, const char *blurb) |
3098 | { | |
efd26800 | 3099 | const bool utf8_pat = RX_UTF8(prog) ? 1 : 0; |
7918f24d NC |
3100 | |
3101 | PERL_ARGS_ASSERT_DEBUG_START_MATCH; | |
3102 | ||
ab3bbdeb YO |
3103 | if (!PL_colorset) |
3104 | reginitcolors(); | |
3105 | { | |
3106 | RE_PV_QUOTED_DECL(s0, utf8_pat, PERL_DEBUG_PAD_ZERO(0), | |
d2c6dc5e | 3107 | RX_PRECOMP_const(prog), RX_PRELEN(prog), 60); |
ab3bbdeb | 3108 | |
f2ed9b32 | 3109 | RE_PV_QUOTED_DECL(s1, utf8_target, PERL_DEBUG_PAD_ZERO(1), |
ab3bbdeb YO |
3110 | start, end - start, 60); |
3111 | ||
3112 | PerlIO_printf(Perl_debug_log, | |
3113 | "%s%s REx%s %s against %s\n", | |
3114 | PL_colors[4], blurb, PL_colors[5], s0, s1); | |
3115 | ||
f2ed9b32 | 3116 | if (utf8_target||utf8_pat) |
1de06328 YO |
3117 | PerlIO_printf(Perl_debug_log, "UTF-8 %s%s%s...\n", |
3118 | utf8_pat ? "pattern" : "", | |
f2ed9b32 KW |
3119 | utf8_pat && utf8_target ? " and " : "", |
3120 | utf8_target ? "string" : "" | |
ab3bbdeb YO |
3121 | ); |
3122 | } | |
3123 | } | |
3df15adc YO |
3124 | |
3125 | STATIC void | |
786e8c11 YO |
3126 | S_dump_exec_pos(pTHX_ const char *locinput, |
3127 | const regnode *scan, | |
3128 | const char *loc_regeol, | |
3129 | const char *loc_bostr, | |
3130 | const char *loc_reg_starttry, | |
f2ed9b32 | 3131 | const bool utf8_target) |
07be1b83 | 3132 | { |
786e8c11 | 3133 | const int docolor = *PL_colors[0] || *PL_colors[2] || *PL_colors[4]; |
07be1b83 | 3134 | const int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */ |
786e8c11 | 3135 | int l = (loc_regeol - locinput) > taill ? taill : (loc_regeol - locinput); |
07be1b83 YO |
3136 | /* The part of the string before starttry has one color |
3137 | (pref0_len chars), between starttry and current | |
3138 | position another one (pref_len - pref0_len chars), | |
3139 | after the current position the third one. | |
3140 | We assume that pref0_len <= pref_len, otherwise we | |
3141 | decrease pref0_len. */ | |
786e8c11 YO |
3142 | int pref_len = (locinput - loc_bostr) > (5 + taill) - l |
3143 | ? (5 + taill) - l : locinput - loc_bostr; | |
07be1b83 YO |
3144 | int pref0_len; |
3145 | ||
7918f24d NC |
3146 | PERL_ARGS_ASSERT_DUMP_EXEC_POS; |
3147 | ||
f2ed9b32 | 3148 | while (utf8_target && UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len))) |
07be1b83 | 3149 | pref_len++; |
786e8c11 YO |
3150 | pref0_len = pref_len - (locinput - loc_reg_starttry); |
3151 | if (l + pref_len < (5 + taill) && l < loc_regeol - locinput) | |
3152 | l = ( loc_regeol - locinput > (5 + taill) - pref_len | |
3153 | ? (5 + taill) - pref_len : loc_regeol - locinput); | |
f2ed9b32 | 3154 | while (utf8_target && UTF8_IS_CONTINUATION(*(U8*)(locinput + l))) |
07be1b83 YO |
3155 | l--; |
3156 | if (pref0_len < 0) | |
3157 | pref0_len = 0; | |
3158 | if (pref0_len > pref_len) | |
3159 | pref0_len = pref_len; | |
3160 | { | |
f2ed9b32 | 3161 | const int is_uni = (utf8_target && OP(scan) != CANY) ? 1 : 0; |
0df25f3d | 3162 | |
ab3bbdeb | 3163 | RE_PV_COLOR_DECL(s0,len0,is_uni,PERL_DEBUG_PAD(0), |
1de06328 | 3164 | (locinput - pref_len),pref0_len, 60, 4, 5); |
0df25f3d | 3165 | |
ab3bbdeb | 3166 | RE_PV_COLOR_DECL(s1,len1,is_uni,PERL_DEBUG_PAD(1), |
3df15adc | 3167 | (locinput - pref_len + pref0_len), |
1de06328 | 3168 | pref_len - pref0_len, 60, 2, 3); |
0df25f3d | 3169 | |
ab3bbdeb | 3170 | RE_PV_COLOR_DECL(s2,len2,is_uni,PERL_DEBUG_PAD(2), |
1de06328 | 3171 | locinput, loc_regeol - locinput, 10, 0, 1); |
0df25f3d | 3172 | |
1de06328 | 3173 | const STRLEN tlen=len0+len1+len2; |
3df15adc | 3174 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb | 3175 | "%4"IVdf" <%.*s%.*s%s%.*s>%*s|", |
786e8c11 | 3176 | (IV)(locinput - loc_bostr), |
07be1b83 | 3177 | len0, s0, |
07be1b83 | 3178 | len1, s1, |
07be1b83 | 3179 | (docolor ? "" : "> <"), |
07be1b83 | 3180 | len2, s2, |
f9f4320a | 3181 | (int)(tlen > 19 ? 0 : 19 - tlen), |
07be1b83 YO |
3182 | ""); |
3183 | } | |
3184 | } | |
3df15adc | 3185 | |
07be1b83 YO |
3186 | #endif |
3187 | ||
0a4db386 YO |
3188 | /* reg_check_named_buff_matched() |
3189 | * Checks to see if a named buffer has matched. The data array of | |
3190 | * buffer numbers corresponding to the buffer is expected to reside | |
3191 | * in the regexp->data->data array in the slot stored in the ARG() of | |
3192 | * node involved. Note that this routine doesn't actually care about the | |
3193 | * name, that information is not preserved from compilation to execution. | |
3194 | * Returns the index of the leftmost defined buffer with the given name | |
3195 | * or 0 if non of the buffers matched. | |
3196 | */ | |
3197 | STATIC I32 | |
7918f24d NC |
3198 | S_reg_check_named_buff_matched(pTHX_ const regexp *rex, const regnode *scan) |
3199 | { | |
0a4db386 | 3200 | I32 n; |
f8fc2ecf | 3201 | RXi_GET_DECL(rex,rexi); |
ad64d0ec | 3202 | SV *sv_dat= MUTABLE_SV(rexi->data->data[ ARG( scan ) ]); |
0a4db386 | 3203 | I32 *nums=(I32*)SvPVX(sv_dat); |
7918f24d NC |
3204 | |
3205 | PERL_ARGS_ASSERT_REG_CHECK_NAMED_BUFF_MATCHED; | |
3206 | ||
0a4db386 | 3207 | for ( n=0; n<SvIVX(sv_dat); n++ ) { |
b93070ed DM |
3208 | if ((I32)rex->lastparen >= nums[n] && |
3209 | rex->offs[nums[n]].end != -1) | |
0a4db386 YO |
3210 | { |
3211 | return nums[n]; | |
3212 | } | |
3213 | } | |
3214 | return 0; | |
3215 | } | |
3216 | ||
2f554ef7 DM |
3217 | |
3218 | /* free all slabs above current one - called during LEAVE_SCOPE */ | |
3219 | ||
3220 | STATIC void | |
3221 | S_clear_backtrack_stack(pTHX_ void *p) | |
3222 | { | |
3223 | regmatch_slab *s = PL_regmatch_slab->next; | |
3224 | PERL_UNUSED_ARG(p); | |
3225 | ||
3226 | if (!s) | |
3227 | return; | |
3228 | PL_regmatch_slab->next = NULL; | |
3229 | while (s) { | |
3230 | regmatch_slab * const osl = s; | |
3231 | s = s->next; | |
3232 | Safefree(osl); | |
3233 | } | |
3234 | } | |
c74f6de9 | 3235 | static bool |
984e6dd1 DM |
3236 | S_setup_EXACTISH_ST_c1_c2(pTHX_ const regnode * const text_node, int *c1p, |
3237 | U8* c1_utf8, int *c2p, U8* c2_utf8, bool is_utf8_pat) | |
c74f6de9 | 3238 | { |
79a2a0e8 KW |
3239 | /* This function determines if there are one or two characters that match |
3240 | * the first character of the passed-in EXACTish node <text_node>, and if | |
3241 | * so, returns them in the passed-in pointers. | |
c74f6de9 | 3242 | * |
79a2a0e8 KW |
3243 | * If it determines that no possible character in the target string can |
3244 | * match, it returns FALSE; otherwise TRUE. (The FALSE situation occurs if | |
3245 | * the first character in <text_node> requires UTF-8 to represent, and the | |
3246 | * target string isn't in UTF-8.) | |
c74f6de9 | 3247 | * |
79a2a0e8 KW |
3248 | * If there are more than two characters that could match the beginning of |
3249 | * <text_node>, or if more context is required to determine a match or not, | |
3250 | * it sets both *<c1p> and *<c2p> to CHRTEST_VOID. | |
3251 | * | |
3252 | * The motiviation behind this function is to allow the caller to set up | |
3253 | * tight loops for matching. If <text_node> is of type EXACT, there is | |
3254 | * only one possible character that can match its first character, and so | |
3255 | * the situation is quite simple. But things get much more complicated if | |
3256 | * folding is involved. It may be that the first character of an EXACTFish | |
3257 | * node doesn't participate in any possible fold, e.g., punctuation, so it | |
3258 | * can be matched only by itself. The vast majority of characters that are | |
3259 | * in folds match just two things, their lower and upper-case equivalents. | |
3260 | * But not all are like that; some have multiple possible matches, or match | |
3261 | * sequences of more than one character. This function sorts all that out. | |
3262 | * | |
3263 | * Consider the patterns A*B or A*?B where A and B are arbitrary. In a | |
3264 | * loop of trying to match A*, we know we can't exit where the thing | |
3265 | * following it isn't a B. And something can't be a B unless it is the | |
3266 | * beginning of B. By putting a quick test for that beginning in a tight | |
3267 | * loop, we can rule out things that can't possibly be B without having to | |
3268 | * break out of the loop, thus avoiding work. Similarly, if A is a single | |
3269 | * character, we can make a tight loop matching A*, using the outputs of | |
3270 | * this function. | |
3271 | * | |
3272 | * If the target string to match isn't in UTF-8, and there aren't | |
3273 | * complications which require CHRTEST_VOID, *<c1p> and *<c2p> are set to | |
3274 | * the one or two possible octets (which are characters in this situation) | |
3275 | * that can match. In all cases, if there is only one character that can | |
3276 | * match, *<c1p> and *<c2p> will be identical. | |
3277 | * | |
3278 | * If the target string is in UTF-8, the buffers pointed to by <c1_utf8> | |
3279 | * and <c2_utf8> will contain the one or two UTF-8 sequences of bytes that | |
3280 | * can match the beginning of <text_node>. They should be declared with at | |
3281 | * least length UTF8_MAXBYTES+1. (If the target string isn't in UTF-8, it is | |
3282 | * undefined what these contain.) If one or both of the buffers are | |
3283 | * invariant under UTF-8, *<c1p>, and *<c2p> will also be set to the | |
3284 | * corresponding invariant. If variant, the corresponding *<c1p> and/or | |
3285 | * *<c2p> will be set to a negative number(s) that shouldn't match any code | |
3286 | * point (unless inappropriately coerced to unsigned). *<c1p> will equal | |
3287 | * *<c2p> if and only if <c1_utf8> and <c2_utf8> are the same. */ | |
c74f6de9 KW |
3288 | |
3289 | const bool utf8_target = PL_reg_match_utf8; | |
79a2a0e8 | 3290 | |
ddb0d839 KW |
3291 | UV c1 = CHRTEST_NOT_A_CP_1; |
3292 | UV c2 = CHRTEST_NOT_A_CP_2; | |
79a2a0e8 KW |
3293 | bool use_chrtest_void = FALSE; |
3294 | ||
3295 | /* Used when we have both utf8 input and utf8 output, to avoid converting | |
3296 | * to/from code points */ | |
3297 | bool utf8_has_been_setup = FALSE; | |
3298 | ||
c74f6de9 KW |
3299 | dVAR; |
3300 | ||
b4291290 | 3301 | U8 *pat = (U8*)STRING(text_node); |
c74f6de9 | 3302 | |
79a2a0e8 KW |
3303 | if (OP(text_node) == EXACT) { |
3304 | ||
3305 | /* In an exact node, only one thing can be matched, that first | |
3306 | * character. If both the pat and the target are UTF-8, we can just | |
3307 | * copy the input to the output, avoiding finding the code point of | |
3308 | * that character */ | |
984e6dd1 | 3309 | if (!is_utf8_pat) { |
79a2a0e8 KW |
3310 | c2 = c1 = *pat; |
3311 | } | |
3312 | else if (utf8_target) { | |
3313 | Copy(pat, c1_utf8, UTF8SKIP(pat), U8); | |
3314 | Copy(pat, c2_utf8, UTF8SKIP(pat), U8); | |
3315 | utf8_has_been_setup = TRUE; | |
3316 | } | |
3317 | else { | |
3318 | c2 = c1 = valid_utf8_to_uvchr(pat, NULL); | |
c74f6de9 | 3319 | } |
79a2a0e8 KW |
3320 | } |
3321 | else /* an EXACTFish node */ | |
984e6dd1 | 3322 | if ((is_utf8_pat |
79a2a0e8 KW |
3323 | && is_MULTI_CHAR_FOLD_utf8_safe(pat, |
3324 | pat + STR_LEN(text_node))) | |
984e6dd1 | 3325 | || (!is_utf8_pat |
79a2a0e8 KW |
3326 | && is_MULTI_CHAR_FOLD_latin1_safe(pat, |
3327 | pat + STR_LEN(text_node)))) | |
3328 | { | |
3329 | /* Multi-character folds require more context to sort out. Also | |
3330 | * PL_utf8_foldclosures used below doesn't handle them, so have to be | |
3331 | * handled outside this routine */ | |
3332 | use_chrtest_void = TRUE; | |
3333 | } | |
3334 | else { /* an EXACTFish node which doesn't begin with a multi-char fold */ | |
984e6dd1 | 3335 | c1 = is_utf8_pat ? valid_utf8_to_uvchr(pat, NULL) : *pat; |
79a2a0e8 KW |
3336 | if (c1 > 256) { |
3337 | /* Load the folds hash, if not already done */ | |
3338 | SV** listp; | |
3339 | if (! PL_utf8_foldclosures) { | |
3340 | if (! PL_utf8_tofold) { | |
3341 | U8 dummy[UTF8_MAXBYTES+1]; | |
3342 | ||
3343 | /* Force loading this by folding an above-Latin1 char */ | |
3344 | to_utf8_fold((U8*) HYPHEN_UTF8, dummy, NULL); | |
3345 | assert(PL_utf8_tofold); /* Verify that worked */ | |
3346 | } | |
3347 | PL_utf8_foldclosures = _swash_inversion_hash(PL_utf8_tofold); | |
3348 | } | |
3349 | ||
3350 | /* The fold closures data structure is a hash with the keys being | |
3351 | * the UTF-8 of every character that is folded to, like 'k', and | |
3352 | * the values each an array of all code points that fold to its | |
3353 | * key. e.g. [ 'k', 'K', KELVIN_SIGN ]. Multi-character folds are | |
3354 | * not included */ | |
3355 | if ((! (listp = hv_fetch(PL_utf8_foldclosures, | |
3356 | (char *) pat, | |
3357 | UTF8SKIP(pat), | |
3358 | FALSE)))) | |
3359 | { | |
3360 | /* Not found in the hash, therefore there are no folds | |
3361 | * containing it, so there is only a single character that | |
3362 | * could match */ | |
3363 | c2 = c1; | |
3364 | } | |
3365 | else { /* Does participate in folds */ | |
3366 | AV* list = (AV*) *listp; | |
3367 | if (av_len(list) != 1) { | |
3368 | ||
3369 | /* If there aren't exactly two folds to this, it is outside | |
3370 | * the scope of this function */ | |
3371 | use_chrtest_void = TRUE; | |
3372 | } | |
3373 | else { /* There are two. Get them */ | |
3374 | SV** c_p = av_fetch(list, 0, FALSE); | |
3375 | if (c_p == NULL) { | |
3376 | Perl_croak(aTHX_ "panic: invalid PL_utf8_foldclosures structure"); | |
3377 | } | |
3378 | c1 = SvUV(*c_p); | |
3379 | ||
3380 | c_p = av_fetch(list, 1, FALSE); | |
3381 | if (c_p == NULL) { | |
3382 | Perl_croak(aTHX_ "panic: invalid PL_utf8_foldclosures structure"); | |
3383 | } | |
3384 | c2 = SvUV(*c_p); | |
3385 | ||
3386 | /* Folds that cross the 255/256 boundary are forbidden if | |
3387 | * EXACTFL, or EXACTFA and one is ASCIII. Since the | |
3388 | * pattern character is above 256, and its only other match | |
3389 | * is below 256, the only legal match will be to itself. | |
3390 | * We have thrown away the original, so have to compute | |
3391 | * which is the one above 255 */ | |
3392 | if ((c1 < 256) != (c2 < 256)) { | |
3393 | if (OP(text_node) == EXACTFL | |
3394 | || (OP(text_node) == EXACTFA | |
3395 | && (isASCII(c1) || isASCII(c2)))) | |
3396 | { | |
3397 | if (c1 < 256) { | |
3398 | c1 = c2; | |
3399 | } | |
3400 | else { | |
3401 | c2 = c1; | |
3402 | } | |
3403 | } | |
3404 | } | |
3405 | } | |
3406 | } | |
3407 | } | |
3408 | else /* Here, c1 is < 255 */ | |
3409 | if (utf8_target | |
3410 | && HAS_NONLATIN1_FOLD_CLOSURE(c1) | |
3411 | && OP(text_node) != EXACTFL | |
3412 | && (OP(text_node) != EXACTFA || ! isASCII(c1))) | |
c74f6de9 KW |
3413 | { |
3414 | /* Here, there could be something above Latin1 in the target which | |
79a2a0e8 KW |
3415 | * folds to this character in the pattern. All such cases except |
3416 | * LATIN SMALL LETTER Y WITH DIAERESIS have more than two characters | |
3417 | * involved in their folds, so are outside the scope of this | |
3418 | * function */ | |
3419 | if (UNLIKELY(c1 == LATIN_SMALL_LETTER_Y_WITH_DIAERESIS)) { | |
3420 | c2 = LATIN_CAPITAL_LETTER_Y_WITH_DIAERESIS; | |
3421 | } | |
3422 | else { | |
3423 | use_chrtest_void = TRUE; | |
3424 | } | |
c74f6de9 KW |
3425 | } |
3426 | else { /* Here nothing above Latin1 can fold to the pattern character */ | |
3427 | switch (OP(text_node)) { | |
3428 | ||
3429 | case EXACTFL: /* /l rules */ | |
79a2a0e8 | 3430 | c2 = PL_fold_locale[c1]; |
c74f6de9 KW |
3431 | break; |
3432 | ||
3433 | case EXACTF: | |
3434 | if (! utf8_target) { /* /d rules */ | |
79a2a0e8 | 3435 | c2 = PL_fold[c1]; |
c74f6de9 KW |
3436 | break; |
3437 | } | |
3438 | /* FALLTHROUGH */ | |
3439 | /* /u rules for all these. This happens to work for | |
79a2a0e8 | 3440 | * EXACTFA as nothing in Latin1 folds to ASCII */ |
c74f6de9 KW |
3441 | case EXACTFA: |
3442 | case EXACTFU_TRICKYFOLD: | |
79a2a0e8 | 3443 | case EXACTFU_SS: |
c74f6de9 | 3444 | case EXACTFU: |
79a2a0e8 | 3445 | c2 = PL_fold_latin1[c1]; |
c74f6de9 KW |
3446 | break; |
3447 | ||
878531d3 KW |
3448 | default: |
3449 | Perl_croak(aTHX_ "panic: Unexpected op %u", OP(text_node)); | |
3450 | assert(0); /* NOTREACHED */ | |
c74f6de9 KW |
3451 | } |
3452 | } | |
3453 | } | |
79a2a0e8 KW |
3454 | |
3455 | /* Here have figured things out. Set up the returns */ | |
3456 | if (use_chrtest_void) { | |
3457 | *c2p = *c1p = CHRTEST_VOID; | |
3458 | } | |
3459 | else if (utf8_target) { | |
3460 | if (! utf8_has_been_setup) { /* Don't have the utf8; must get it */ | |
3461 | uvchr_to_utf8(c1_utf8, c1); | |
3462 | uvchr_to_utf8(c2_utf8, c2); | |
c74f6de9 | 3463 | } |
c74f6de9 | 3464 | |
79a2a0e8 KW |
3465 | /* Invariants are stored in both the utf8 and byte outputs; Use |
3466 | * negative numbers otherwise for the byte ones. Make sure that the | |
3467 | * byte ones are the same iff the utf8 ones are the same */ | |
3468 | *c1p = (UTF8_IS_INVARIANT(*c1_utf8)) ? *c1_utf8 : CHRTEST_NOT_A_CP_1; | |
3469 | *c2p = (UTF8_IS_INVARIANT(*c2_utf8)) | |
3470 | ? *c2_utf8 | |
3471 | : (c1 == c2) | |
3472 | ? CHRTEST_NOT_A_CP_1 | |
3473 | : CHRTEST_NOT_A_CP_2; | |
3474 | } | |
3475 | else if (c1 > 255) { | |
3476 | if (c2 > 255) { /* both possibilities are above what a non-utf8 string | |
3477 | can represent */ | |
3478 | return FALSE; | |
3479 | } | |
c74f6de9 | 3480 | |
79a2a0e8 KW |
3481 | *c1p = *c2p = c2; /* c2 is the only representable value */ |
3482 | } | |
3483 | else { /* c1 is representable; see about c2 */ | |
3484 | *c1p = c1; | |
3485 | *c2p = (c2 < 256) ? c2 : c1; | |
c74f6de9 | 3486 | } |
2f554ef7 | 3487 | |
c74f6de9 KW |
3488 | return TRUE; |
3489 | } | |
2f554ef7 | 3490 | |
f73aaa43 DM |
3491 | /* returns -1 on failure, $+[0] on success */ |
3492 | STATIC I32 | |
3493 | S_regmatch(pTHX_ regmatch_info *reginfo, char *startpos, regnode *prog) | |
d6a28714 | 3494 | { |
a35a87e7 | 3495 | #if PERL_VERSION < 9 && !defined(PERL_CORE) |
54df2634 NC |
3496 | dMY_CXT; |
3497 | #endif | |
27da23d5 | 3498 | dVAR; |
eb578fdb | 3499 | const bool utf8_target = PL_reg_match_utf8; |
4ad0818d | 3500 | const U32 uniflags = UTF8_ALLOW_DEFAULT; |
288b8c02 | 3501 | REGEXP *rex_sv = reginfo->prog; |
8d919b0a | 3502 | regexp *rex = ReANY(rex_sv); |
f8fc2ecf | 3503 | RXi_GET_DECL(rex,rexi); |
2f554ef7 | 3504 | I32 oldsave; |
5d9a96ca | 3505 | /* the current state. This is a cached copy of PL_regmatch_state */ |
eb578fdb | 3506 | regmatch_state *st; |
5d9a96ca | 3507 | /* cache heavy used fields of st in registers */ |
eb578fdb KW |
3508 | regnode *scan; |
3509 | regnode *next; | |
3510 | U32 n = 0; /* general value; init to avoid compiler warning */ | |
3511 | I32 ln = 0; /* len or last; init to avoid compiler warning */ | |
d60de1d1 | 3512 | char *locinput = startpos; |
4d5016e5 | 3513 | char *pushinput; /* where to continue after a PUSH */ |
eb578fdb | 3514 | I32 nextchr; /* is always set to UCHARAT(locinput) */ |
24d3c4a9 | 3515 | |
b69b0499 | 3516 | bool result = 0; /* return value of S_regmatch */ |
24d3c4a9 | 3517 | int depth = 0; /* depth of backtrack stack */ |
4b196cd4 YO |
3518 | U32 nochange_depth = 0; /* depth of GOSUB recursion with nochange */ |
3519 | const U32 max_nochange_depth = | |
3520 | (3 * rex->nparens > MAX_RECURSE_EVAL_NOCHANGE_DEPTH) ? | |
3521 | 3 * rex->nparens : MAX_RECURSE_EVAL_NOCHANGE_DEPTH; | |
77cb431f DM |
3522 | regmatch_state *yes_state = NULL; /* state to pop to on success of |
3523 | subpattern */ | |
e2e6a0f1 YO |
3524 | /* mark_state piggy backs on the yes_state logic so that when we unwind |
3525 | the stack on success we can update the mark_state as we go */ | |
3526 | regmatch_state *mark_state = NULL; /* last mark state we have seen */ | |
faec1544 | 3527 | regmatch_state *cur_eval = NULL; /* most recent EVAL_AB state */ |
b8591aee | 3528 | struct regmatch_state *cur_curlyx = NULL; /* most recent curlyx */ |
40a82448 | 3529 | U32 state_num; |
5d458dd8 YO |
3530 | bool no_final = 0; /* prevent failure from backtracking? */ |
3531 | bool do_cutgroup = 0; /* no_final only until next branch/trie entry */ | |
d60de1d1 | 3532 | char *startpoint = locinput; |
5d458dd8 YO |
3533 | SV *popmark = NULL; /* are we looking for a mark? */ |
3534 | SV *sv_commit = NULL; /* last mark name seen in failure */ | |
3535 | SV *sv_yes_mark = NULL; /* last mark name we have seen | |
486ec47a | 3536 | during a successful match */ |
5d458dd8 YO |
3537 | U32 lastopen = 0; /* last open we saw */ |
3538 | bool has_cutgroup = RX_HAS_CUTGROUP(rex) ? 1 : 0; | |
19b95bf0 | 3539 | SV* const oreplsv = GvSV(PL_replgv); |
24d3c4a9 DM |
3540 | /* these three flags are set by various ops to signal information to |
3541 | * the very next op. They have a useful lifetime of exactly one loop | |
3542 | * iteration, and are not preserved or restored by state pushes/pops | |
3543 | */ | |
3544 | bool sw = 0; /* the condition value in (?(cond)a|b) */ | |
3545 | bool minmod = 0; /* the next "{n,m}" is a "{n,m}?" */ | |
3546 | int logical = 0; /* the following EVAL is: | |
3547 | 0: (?{...}) | |
3548 | 1: (?(?{...})X|Y) | |
3549 | 2: (??{...}) | |
3550 | or the following IFMATCH/UNLESSM is: | |
3551 | false: plain (?=foo) | |
3552 | true: used as a condition: (?(?=foo)) | |
3553 | */ | |
81ed78b2 DM |
3554 | PAD* last_pad = NULL; |
3555 | dMULTICALL; | |
3556 | I32 gimme = G_SCALAR; | |
3557 | CV *caller_cv = NULL; /* who called us */ | |
3558 | CV *last_pushed_cv = NULL; /* most recently called (?{}) CV */ | |
74088413 | 3559 | CHECKPOINT runops_cp; /* savestack position before executing EVAL */ |
92da3157 | 3560 | U32 maxopenparen = 0; /* max '(' index seen so far */ |
3018b823 KW |
3561 | int to_complement; /* Invert the result? */ |
3562 | _char_class_number classnum; | |
984e6dd1 | 3563 | bool is_utf8_pat = reginfo->is_utf8_pat; |
81ed78b2 | 3564 | |
95b24440 | 3565 | #ifdef DEBUGGING |
e68ec53f | 3566 | GET_RE_DEBUG_FLAGS_DECL; |
d6a28714 JH |
3567 | #endif |
3568 | ||
81ed78b2 DM |
3569 | /* shut up 'may be used uninitialized' compiler warnings for dMULTICALL */ |
3570 | multicall_oldcatch = 0; | |
3571 | multicall_cv = NULL; | |
3572 | cx = NULL; | |
4f8dbb2d JL |
3573 | PERL_UNUSED_VAR(multicall_cop); |
3574 | PERL_UNUSED_VAR(newsp); | |
81ed78b2 DM |
3575 | |
3576 | ||
7918f24d NC |
3577 | PERL_ARGS_ASSERT_REGMATCH; |
3578 | ||
3b57cd43 | 3579 | DEBUG_OPTIMISE_r( DEBUG_EXECUTE_r({ |
24b23f37 | 3580 | PerlIO_printf(Perl_debug_log,"regmatch start\n"); |
3b57cd43 | 3581 | })); |
5d9a96ca DM |
3582 | /* on first ever call to regmatch, allocate first slab */ |
3583 | if (!PL_regmatch_slab) { | |
3584 | Newx(PL_regmatch_slab, 1, regmatch_slab); | |
3585 | PL_regmatch_slab->prev = NULL; | |
3586 | PL_regmatch_slab->next = NULL; | |
86545054 | 3587 | PL_regmatch_state = SLAB_FIRST(PL_regmatch_slab); |
5d9a96ca DM |
3588 | } |
3589 | ||
2f554ef7 DM |
3590 | oldsave = PL_savestack_ix; |
3591 | SAVEDESTRUCTOR_X(S_clear_backtrack_stack, NULL); | |
3592 | SAVEVPTR(PL_regmatch_slab); | |
3593 | SAVEVPTR(PL_regmatch_state); | |
5d9a96ca DM |
3594 | |
3595 | /* grab next free state slot */ | |
3596 | st = ++PL_regmatch_state; | |
86545054 | 3597 | if (st > SLAB_LAST(PL_regmatch_slab)) |
5d9a96ca DM |
3598 | st = PL_regmatch_state = S_push_slab(aTHX); |
3599 | ||
d6a28714 | 3600 | /* Note that nextchr is a byte even in UTF */ |
7016d6eb | 3601 | SET_nextchr; |
d6a28714 JH |
3602 | scan = prog; |
3603 | while (scan != NULL) { | |
8ba1375e | 3604 | |
a3621e74 | 3605 | DEBUG_EXECUTE_r( { |
6136c704 | 3606 | SV * const prop = sv_newmortal(); |
1de06328 | 3607 | regnode *rnext=regnext(scan); |
f2ed9b32 | 3608 | DUMP_EXEC_POS( locinput, scan, utf8_target ); |
32fc9b6a | 3609 | regprop(rex, prop, scan); |
07be1b83 YO |
3610 | |
3611 | PerlIO_printf(Perl_debug_log, | |
3612 | "%3"IVdf":%*s%s(%"IVdf")\n", | |
f8fc2ecf | 3613 | (IV)(scan - rexi->program), depth*2, "", |
07be1b83 | 3614 | SvPVX_const(prop), |
1de06328 | 3615 | (PL_regkind[OP(scan)] == END || !rnext) ? |
f8fc2ecf | 3616 | 0 : (IV)(rnext - rexi->program)); |
2a782b5b | 3617 | }); |
d6a28714 JH |
3618 | |
3619 | next = scan + NEXT_OFF(scan); | |
3620 | if (next == scan) | |
3621 | next = NULL; | |
40a82448 | 3622 | state_num = OP(scan); |
d6a28714 | 3623 | |
40a82448 | 3624 | reenter_switch: |
3018b823 | 3625 | to_complement = 0; |
34a81e2b | 3626 | |
7016d6eb | 3627 | SET_nextchr; |
e6ca698c | 3628 | assert(nextchr < 256 && (nextchr >= 0 || nextchr == NEXTCHR_EOS)); |
bf798dc4 | 3629 | |
40a82448 | 3630 | switch (state_num) { |
3c0563b9 | 3631 | case BOL: /* /^../ */ |
7fba1cd6 | 3632 | if (locinput == PL_bostr) |
d6a28714 | 3633 | { |
3b0527fe | 3634 | /* reginfo->till = reginfo->bol; */ |
b8c5462f JH |
3635 | break; |
3636 | } | |
d6a28714 | 3637 | sayNO; |
3c0563b9 DM |
3638 | |
3639 | case MBOL: /* /^../m */ | |
12d33761 | 3640 | if (locinput == PL_bostr || |
7016d6eb | 3641 | (!NEXTCHR_IS_EOS && locinput[-1] == '\n')) |
d6a28714 | 3642 | { |
b8c5462f JH |
3643 | break; |
3644 | } | |
d6a28714 | 3645 | sayNO; |
3c0563b9 DM |
3646 | |
3647 | case SBOL: /* /^../s */ | |
c2a73568 | 3648 | if (locinput == PL_bostr) |
b8c5462f | 3649 | break; |
d6a28714 | 3650 | sayNO; |
3c0563b9 DM |
3651 | |
3652 | case GPOS: /* \G */ | |
3b0527fe | 3653 | if (locinput == reginfo->ganch) |
d6a28714 JH |
3654 | break; |
3655 | sayNO; | |
ee9b8eae | 3656 | |
3c0563b9 | 3657 | case KEEPS: /* \K */ |
ee9b8eae | 3658 | /* update the startpoint */ |
b93070ed | 3659 | st->u.keeper.val = rex->offs[0].start; |
b93070ed | 3660 | rex->offs[0].start = locinput - PL_bostr; |
4d5016e5 | 3661 | PUSH_STATE_GOTO(KEEPS_next, next, locinput); |
878531d3 | 3662 | assert(0); /*NOTREACHED*/ |
ee9b8eae YO |
3663 | case KEEPS_next_fail: |
3664 | /* rollback the start point change */ | |
b93070ed | 3665 | rex->offs[0].start = st->u.keeper.val; |
ee9b8eae | 3666 | sayNO_SILENT; |
878531d3 | 3667 | assert(0); /*NOTREACHED*/ |
3c0563b9 DM |
3668 | |
3669 | case EOL: /* /..$/ */ | |
d6a28714 | 3670 | goto seol; |
3c0563b9 DM |
3671 | |
3672 | case MEOL: /* /..$/m */ | |
7016d6eb | 3673 | if (!NEXTCHR_IS_EOS && nextchr != '\n') |
b8c5462f | 3674 | sayNO; |
b8c5462f | 3675 | break; |
3c0563b9 DM |
3676 | |
3677 | case SEOL: /* /..$/s */ | |
d6a28714 | 3678 | seol: |
7016d6eb | 3679 | if (!NEXTCHR_IS_EOS && nextchr != '\n') |
b8c5462f | 3680 | sayNO; |
d6a28714 | 3681 | if (PL_regeol - locinput > 1) |
b8c5462f | 3682 | sayNO; |
b8c5462f | 3683 | break; |
3c0563b9 DM |
3684 | |
3685 | case EOS: /* \z */ | |
7016d6eb | 3686 | if (!NEXTCHR_IS_EOS) |
b8c5462f | 3687 | sayNO; |
d6a28714 | 3688 | break; |
3c0563b9 DM |
3689 | |
3690 | case SANY: /* /./s */ | |
7016d6eb | 3691 | if (NEXTCHR_IS_EOS) |
4633a7c4 | 3692 | sayNO; |
28b98f76 | 3693 | goto increment_locinput; |
3c0563b9 DM |
3694 | |
3695 | case CANY: /* \C */ | |
7016d6eb | 3696 | if (NEXTCHR_IS_EOS) |
f33976b4 | 3697 | sayNO; |
3640db6b | 3698 | locinput++; |
a0d0e21e | 3699 | break; |
3c0563b9 DM |
3700 | |
3701 | case REG_ANY: /* /./ */ | |
7016d6eb | 3702 | if ((NEXTCHR_IS_EOS) || nextchr == '\n') |
1aa99e6b | 3703 | sayNO; |
28b98f76 DM |
3704 | goto increment_locinput; |
3705 | ||
166ba7cd DM |
3706 | |
3707 | #undef ST | |
3708 | #define ST st->u.trie | |
3c0563b9 | 3709 | case TRIEC: /* (ab|cd) with known charclass */ |
786e8c11 YO |
3710 | /* In this case the charclass data is available inline so |
3711 | we can fail fast without a lot of extra overhead. | |
3712 | */ | |
7016d6eb | 3713 | if(!NEXTCHR_IS_EOS && !ANYOF_BITMAP_TEST(scan, nextchr)) { |
fab2782b YO |
3714 | DEBUG_EXECUTE_r( |
3715 | PerlIO_printf(Perl_debug_log, | |
3716 | "%*s %sfailed to match trie start class...%s\n", | |
3717 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]) | |
3718 | ); | |
3719 | sayNO_SILENT; | |
118e2215 | 3720 | assert(0); /* NOTREACHED */ |
786e8c11 YO |
3721 | } |
3722 | /* FALL THROUGH */ | |
3c0563b9 | 3723 | case TRIE: /* (ab|cd) */ |
2e64971a DM |
3724 | /* the basic plan of execution of the trie is: |
3725 | * At the beginning, run though all the states, and | |
3726 | * find the longest-matching word. Also remember the position | |
3727 | * of the shortest matching word. For example, this pattern: | |
3728 | * 1 2 3 4 5 | |
3729 | * ab|a|x|abcd|abc | |
3730 | * when matched against the string "abcde", will generate | |
3731 | * accept states for all words except 3, with the longest | |
895cc420 | 3732 | * matching word being 4, and the shortest being 2 (with |
2e64971a DM |
3733 | * the position being after char 1 of the string). |
3734 | * | |
3735 | * Then for each matching word, in word order (i.e. 1,2,4,5), | |
3736 | * we run the remainder of the pattern; on each try setting | |
3737 | * the current position to the character following the word, | |
3738 | * returning to try the next word on failure. | |
3739 | * | |
3740 | * We avoid having to build a list of words at runtime by | |
3741 | * using a compile-time structure, wordinfo[].prev, which | |
3742 | * gives, for each word, the previous accepting word (if any). | |
3743 | * In the case above it would contain the mappings 1->2, 2->0, | |
3744 | * 3->0, 4->5, 5->1. We can use this table to generate, from | |
3745 | * the longest word (4 above), a list of all words, by | |
3746 | * following the list of prev pointers; this gives us the | |
3747 | * unordered list 4,5,1,2. Then given the current word we have | |
3748 | * just tried, we can go through the list and find the | |
3749 | * next-biggest word to try (so if we just failed on word 2, | |
3750 | * the next in the list is 4). | |
3751 | * | |
3752 | * Since at runtime we don't record the matching position in | |
3753 | * the string for each word, we have to work that out for | |
3754 | * each word we're about to process. The wordinfo table holds | |
3755 | * the character length of each word; given that we recorded | |
3756 | * at the start: the position of the shortest word and its | |
3757 | * length in chars, we just need to move the pointer the | |
3758 | * difference between the two char lengths. Depending on | |
3759 | * Unicode status and folding, that's cheap or expensive. | |
3760 | * | |
3761 | * This algorithm is optimised for the case where are only a | |
3762 | * small number of accept states, i.e. 0,1, or maybe 2. | |
3763 | * With lots of accepts states, and having to try all of them, | |
3764 | * it becomes quadratic on number of accept states to find all | |
3765 | * the next words. | |
3766 | */ | |
3767 | ||
3dab1dad | 3768 | { |
07be1b83 | 3769 | /* what type of TRIE am I? (utf8 makes this contextual) */ |
a0a388a1 | 3770 | DECL_TRIE_TYPE(scan); |
3dab1dad YO |
3771 | |
3772 | /* what trie are we using right now */ | |
be8e71aa | 3773 | reg_trie_data * const trie |
f8fc2ecf | 3774 | = (reg_trie_data*)rexi->data->data[ ARG( scan ) ]; |
85fbaab2 | 3775 | HV * widecharmap = MUTABLE_HV(rexi->data->data[ ARG( scan ) + 1 ]); |
3dab1dad | 3776 | U32 state = trie->startstate; |
166ba7cd | 3777 | |
7016d6eb DM |
3778 | if ( trie->bitmap |
3779 | && (NEXTCHR_IS_EOS || !TRIE_BITMAP_TEST(trie, nextchr))) | |
3780 | { | |
3dab1dad YO |
3781 | if (trie->states[ state ].wordnum) { |
3782 | DEBUG_EXECUTE_r( | |
3783 | PerlIO_printf(Perl_debug_log, | |
3784 | "%*s %smatched empty string...%s\n", | |
5bc10b2c | 3785 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]) |
3dab1dad | 3786 | ); |
20dbff7c YO |
3787 | if (!trie->jump) |
3788 | break; | |
3dab1dad YO |
3789 | } else { |
3790 | DEBUG_EXECUTE_r( | |
3791 | PerlIO_printf(Perl_debug_log, | |
786e8c11 | 3792 | "%*s %sfailed to match trie start class...%s\n", |
5bc10b2c | 3793 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]) |
3dab1dad YO |
3794 | ); |
3795 | sayNO_SILENT; | |
3796 | } | |
3797 | } | |
166ba7cd | 3798 | |
786e8c11 YO |
3799 | { |
3800 | U8 *uc = ( U8* )locinput; | |
3801 | ||
3802 | STRLEN len = 0; | |
3803 | STRLEN foldlen = 0; | |
3804 | U8 *uscan = (U8*)NULL; | |
786e8c11 | 3805 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; |
2e64971a DM |
3806 | U32 charcount = 0; /* how many input chars we have matched */ |
3807 | U32 accepted = 0; /* have we seen any accepting states? */ | |
786e8c11 | 3808 | |
786e8c11 | 3809 | ST.jump = trie->jump; |
786e8c11 | 3810 | ST.me = scan; |
2e64971a DM |
3811 | ST.firstpos = NULL; |
3812 | ST.longfold = FALSE; /* char longer if folded => it's harder */ | |
3813 | ST.nextword = 0; | |
3814 | ||
3815 | /* fully traverse the TRIE; note the position of the | |
3816 | shortest accept state and the wordnum of the longest | |
3817 | accept state */ | |
07be1b83 | 3818 | |
a3621e74 | 3819 | while ( state && uc <= (U8*)PL_regeol ) { |
786e8c11 | 3820 | U32 base = trie->states[ state ].trans.base; |
f9f4320a | 3821 | UV uvc = 0; |
acb909b4 | 3822 | U16 charid = 0; |
2e64971a DM |
3823 | U16 wordnum; |
3824 | wordnum = trie->states[ state ].wordnum; | |
3825 | ||
3826 | if (wordnum) { /* it's an accept state */ | |
3827 | if (!accepted) { | |
3828 | accepted = 1; | |
3829 | /* record first match position */ | |
3830 | if (ST.longfold) { | |
3831 | ST.firstpos = (U8*)locinput; | |
3832 | ST.firstchars = 0; | |
5b47454d | 3833 | } |
2e64971a DM |
3834 | else { |
3835 | ST.firstpos = uc; | |
3836 | ST.firstchars = charcount; | |
3837 | } | |
3838 | } | |
3839 | if (!ST.nextword || wordnum < ST.nextword) | |
3840 | ST.nextword = wordnum; | |
3841 | ST.topword = wordnum; | |
786e8c11 | 3842 | } |
a3621e74 | 3843 | |
07be1b83 | 3844 | DEBUG_TRIE_EXECUTE_r({ |
f2ed9b32 | 3845 | DUMP_EXEC_POS( (char *)uc, scan, utf8_target ); |
a3621e74 | 3846 | PerlIO_printf( Perl_debug_log, |
2e64971a | 3847 | "%*s %sState: %4"UVxf" Accepted: %c ", |
5bc10b2c | 3848 | 2+depth * 2, "", PL_colors[4], |
2e64971a | 3849 | (UV)state, (accepted ? 'Y' : 'N')); |
07be1b83 | 3850 | }); |
a3621e74 | 3851 | |
2e64971a | 3852 | /* read a char and goto next state */ |
7016d6eb | 3853 | if ( base && (foldlen || uc < (U8*)PL_regeol)) { |
6dd2be57 | 3854 | I32 offset; |
55eed653 NC |
3855 | REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, |
3856 | uscan, len, uvc, charid, foldlen, | |
3857 | foldbuf, uniflags); | |
2e64971a DM |
3858 | charcount++; |
3859 | if (foldlen>0) | |
3860 | ST.longfold = TRUE; | |
5b47454d | 3861 | if (charid && |
6dd2be57 DM |
3862 | ( ((offset = |
3863 | base + charid - 1 - trie->uniquecharcount)) >= 0) | |
3864 | ||
3865 | && ((U32)offset < trie->lasttrans) | |
3866 | && trie->trans[offset].check == state) | |
5b47454d | 3867 | { |
6dd2be57 | 3868 | state = trie->trans[offset].next; |
5b47454d DM |
3869 | } |
3870 | else { | |
3871 | state = 0; | |
3872 | } | |
3873 | uc += len; | |
3874 | ||
3875 | } | |
3876 | else { | |
a3621e74 YO |
3877 | state = 0; |
3878 | } | |
3879 | DEBUG_TRIE_EXECUTE_r( | |
e4584336 | 3880 | PerlIO_printf( Perl_debug_log, |
786e8c11 | 3881 | "Charid:%3x CP:%4"UVxf" After State: %4"UVxf"%s\n", |
e4584336 | 3882 | charid, uvc, (UV)state, PL_colors[5] ); |
a3621e74 YO |
3883 | ); |
3884 | } | |
2e64971a | 3885 | if (!accepted) |
a3621e74 | 3886 | sayNO; |
a3621e74 | 3887 | |
2e64971a DM |
3888 | /* calculate total number of accept states */ |
3889 | { | |
3890 | U16 w = ST.topword; | |
3891 | accepted = 0; | |
3892 | while (w) { | |
3893 | w = trie->wordinfo[w].prev; | |
3894 | accepted++; | |
3895 | } | |
3896 | ST.accepted = accepted; | |
3897 | } | |
3898 | ||
166ba7cd DM |
3899 | DEBUG_EXECUTE_r( |
3900 | PerlIO_printf( Perl_debug_log, | |
3901 | "%*s %sgot %"IVdf" possible matches%s\n", | |
5bc10b2c | 3902 | REPORT_CODE_OFF + depth * 2, "", |
166ba7cd DM |
3903 | PL_colors[4], (IV)ST.accepted, PL_colors[5] ); |
3904 | ); | |
2e64971a | 3905 | goto trie_first_try; /* jump into the fail handler */ |
786e8c11 | 3906 | }} |
118e2215 | 3907 | assert(0); /* NOTREACHED */ |
2e64971a DM |
3908 | |
3909 | case TRIE_next_fail: /* we failed - try next alternative */ | |
a059a757 DM |
3910 | { |
3911 | U8 *uc; | |
fae667d5 YO |
3912 | if ( ST.jump) { |
3913 | REGCP_UNWIND(ST.cp); | |
a8d1f4b4 | 3914 | UNWIND_PAREN(ST.lastparen, ST.lastcloseparen); |
fae667d5 | 3915 | } |
2e64971a DM |
3916 | if (!--ST.accepted) { |
3917 | DEBUG_EXECUTE_r({ | |
3918 | PerlIO_printf( Perl_debug_log, | |
3919 | "%*s %sTRIE failed...%s\n", | |
3920 | REPORT_CODE_OFF+depth*2, "", | |
3921 | PL_colors[4], | |
3922 | PL_colors[5] ); | |
3923 | }); | |
3924 | sayNO_SILENT; | |
3925 | } | |
3926 | { | |
3927 | /* Find next-highest word to process. Note that this code | |
3928 | * is O(N^2) per trie run (O(N) per branch), so keep tight */ | |
eb578fdb KW |
3929 | U16 min = 0; |
3930 | U16 word; | |
3931 | U16 const nextword = ST.nextword; | |
3932 | reg_trie_wordinfo * const wordinfo | |
2e64971a DM |
3933 | = ((reg_trie_data*)rexi->data->data[ARG(ST.me)])->wordinfo; |
3934 | for (word=ST.topword; word; word=wordinfo[word].prev) { | |
3935 | if (word > nextword && (!min || word < min)) | |
3936 | min = word; | |
3937 | } | |
3938 | ST.nextword = min; | |
3939 | } | |
3940 | ||
fae667d5 | 3941 | trie_first_try: |
5d458dd8 YO |
3942 | if (do_cutgroup) { |
3943 | do_cutgroup = 0; | |
3944 | no_final = 0; | |
3945 | } | |
fae667d5 YO |
3946 | |
3947 | if ( ST.jump) { | |
b93070ed | 3948 | ST.lastparen = rex->lastparen; |
f6033a9d | 3949 | ST.lastcloseparen = rex->lastcloseparen; |
fae667d5 | 3950 | REGCP_SET(ST.cp); |
2e64971a | 3951 | } |
a3621e74 | 3952 | |
2e64971a | 3953 | /* find start char of end of current word */ |
166ba7cd | 3954 | { |
2e64971a | 3955 | U32 chars; /* how many chars to skip */ |
2e64971a DM |
3956 | reg_trie_data * const trie |
3957 | = (reg_trie_data*)rexi->data->data[ARG(ST.me)]; | |
3958 | ||
3959 | assert((trie->wordinfo[ST.nextword].len - trie->prefixlen) | |
3960 | >= ST.firstchars); | |
3961 | chars = (trie->wordinfo[ST.nextword].len - trie->prefixlen) | |
3962 | - ST.firstchars; | |
a059a757 | 3963 | uc = ST.firstpos; |
2e64971a DM |
3964 | |
3965 | if (ST.longfold) { | |
3966 | /* the hard option - fold each char in turn and find | |
3967 | * its folded length (which may be different */ | |
3968 | U8 foldbuf[UTF8_MAXBYTES_CASE + 1]; | |
3969 | STRLEN foldlen; | |
3970 | STRLEN len; | |
d9a396a3 | 3971 | UV uvc; |
2e64971a DM |
3972 | U8 *uscan; |
3973 | ||
3974 | while (chars) { | |
f2ed9b32 | 3975 | if (utf8_target) { |
2e64971a DM |
3976 | uvc = utf8n_to_uvuni((U8*)uc, UTF8_MAXLEN, &len, |
3977 | uniflags); | |
3978 | uc += len; | |
3979 | } | |
3980 | else { | |
3981 | uvc = *uc; | |
3982 | uc++; | |
3983 | } | |
3984 | uvc = to_uni_fold(uvc, foldbuf, &foldlen); | |
3985 | uscan = foldbuf; | |
3986 | while (foldlen) { | |
3987 | if (!--chars) | |
3988 | break; | |
3989 | uvc = utf8n_to_uvuni(uscan, UTF8_MAXLEN, &len, | |
3990 | uniflags); | |
3991 | uscan += len; | |
3992 | foldlen -= len; | |
3993 | } | |
3994 | } | |
a3621e74 | 3995 | } |
2e64971a | 3996 | else { |
f2ed9b32 | 3997 | if (utf8_target) |
2e64971a DM |
3998 | while (chars--) |
3999 | uc += UTF8SKIP(uc); | |
4000 | else | |
4001 | uc += chars; | |
4002 | } | |
2e64971a | 4003 | } |
166ba7cd | 4004 | |
6603fe3e DM |
4005 | scan = ST.me + ((ST.jump && ST.jump[ST.nextword]) |
4006 | ? ST.jump[ST.nextword] | |
4007 | : NEXT_OFF(ST.me)); | |
166ba7cd | 4008 | |
2e64971a DM |
4009 | DEBUG_EXECUTE_r({ |
4010 | PerlIO_printf( Perl_debug_log, | |
4011 | "%*s %sTRIE matched word #%d, continuing%s\n", | |
4012 | REPORT_CODE_OFF+depth*2, "", | |
4013 | PL_colors[4], | |
4014 | ST.nextword, | |
4015 | PL_colors[5] | |
4016 | ); | |
4017 | }); | |
4018 | ||
4019 | if (ST.accepted > 1 || has_cutgroup) { | |
a059a757 | 4020 | PUSH_STATE_GOTO(TRIE_next, scan, (char*)uc); |
118e2215 | 4021 | assert(0); /* NOTREACHED */ |
166ba7cd | 4022 | } |
2e64971a DM |
4023 | /* only one choice left - just continue */ |
4024 | DEBUG_EXECUTE_r({ | |
4025 | AV *const trie_words | |
4026 | = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]); | |
4027 | SV ** const tmp = av_fetch( trie_words, | |
4028 | ST.nextword-1, 0 ); | |
4029 | SV *sv= tmp ? sv_newmortal() : NULL; | |
4030 | ||
4031 | PerlIO_printf( Perl_debug_log, | |
4032 | "%*s %sonly one match left, short-circuiting: #%d <%s>%s\n", | |
4033 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], | |
4034 | ST.nextword, | |
4035 | tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0, | |
4036 | PL_colors[0], PL_colors[1], | |
c89df6cf | 4037 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)|PERL_PV_ESCAPE_NONASCII |
2e64971a DM |
4038 | ) |
4039 | : "not compiled under -Dr", | |
4040 | PL_colors[5] ); | |
4041 | }); | |
4042 | ||
a059a757 | 4043 | locinput = (char*)uc; |
2e64971a | 4044 | continue; /* execute rest of RE */ |
118e2215 | 4045 | assert(0); /* NOTREACHED */ |
a059a757 | 4046 | } |
166ba7cd DM |
4047 | #undef ST |
4048 | ||
3c0563b9 | 4049 | case EXACT: { /* /abc/ */ |
95b24440 | 4050 | char *s = STRING(scan); |
24d3c4a9 | 4051 | ln = STR_LEN(scan); |
984e6dd1 | 4052 | if (utf8_target != is_utf8_pat) { |
bc517b45 | 4053 | /* The target and the pattern have differing utf8ness. */ |
1aa99e6b | 4054 | char *l = locinput; |
24d3c4a9 | 4055 | const char * const e = s + ln; |
a72c7584 | 4056 | |
f2ed9b32 | 4057 | if (utf8_target) { |
e6a3850e KW |
4058 | /* The target is utf8, the pattern is not utf8. |
4059 | * Above-Latin1 code points can't match the pattern; | |
4060 | * invariants match exactly, and the other Latin1 ones need | |
4061 | * to be downgraded to a single byte in order to do the | |
4062 | * comparison. (If we could be confident that the target | |
4063 | * is not malformed, this could be refactored to have fewer | |
4064 | * tests by just assuming that if the first bytes match, it | |
4065 | * is an invariant, but there are tests in the test suite | |
4066 | * dealing with (??{...}) which violate this) */ | |
1aa99e6b | 4067 | while (s < e) { |
5ac65bff | 4068 | if (l >= PL_regeol || UTF8_IS_ABOVE_LATIN1(* (U8*) l)) { |
e6a3850e KW |
4069 | sayNO; |
4070 | } | |
4071 | if (UTF8_IS_INVARIANT(*(U8*)l)) { | |
4072 | if (*l != *s) { | |
4073 | sayNO; | |
4074 | } | |
4075 | l++; | |
4076 | } | |
4077 | else { | |
4078 | if (TWO_BYTE_UTF8_TO_UNI(*l, *(l+1)) != * (U8*) s) { | |
4079 | sayNO; | |
4080 | } | |
4081 | l += 2; | |
4082 | } | |
4083 | s++; | |
1aa99e6b | 4084 | } |
5ff6fc6d JH |
4085 | } |
4086 | else { | |
4087 | /* The target is not utf8, the pattern is utf8. */ | |
1aa99e6b | 4088 | while (s < e) { |
e6a3850e KW |
4089 | if (l >= PL_regeol || UTF8_IS_ABOVE_LATIN1(* (U8*) s)) |
4090 | { | |
4091 | sayNO; | |
4092 | } | |
4093 | if (UTF8_IS_INVARIANT(*(U8*)s)) { | |
4094 | if (*s != *l) { | |
4095 | sayNO; | |
4096 | } | |
4097 | s++; | |
4098 | } | |
4099 | else { | |
4100 | if (TWO_BYTE_UTF8_TO_UNI(*s, *(s+1)) != * (U8*) l) { | |
4101 | sayNO; | |
4102 | } | |
4103 | s += 2; | |
4104 | } | |
4105 | l++; | |
1aa99e6b | 4106 | } |
5ff6fc6d | 4107 | } |
1aa99e6b | 4108 | locinput = l; |
1aa99e6b | 4109 | } |
5ac65bff KW |
4110 | else { |
4111 | /* The target and the pattern have the same utf8ness. */ | |
4112 | /* Inline the first character, for speed. */ | |
4113 | if (PL_regeol - locinput < ln | |
4114 | || UCHARAT(s) != nextchr | |
4115 | || (ln > 1 && memNE(s, locinput, ln))) | |
4116 | { | |
4117 | sayNO; | |
4118 | } | |
4119 | locinput += ln; | |
4120 | } | |
d6a28714 | 4121 | break; |
95b24440 | 4122 | } |
7016d6eb | 4123 | |
3c0563b9 | 4124 | case EXACTFL: { /* /abc/il */ |
a932d541 | 4125 | re_fold_t folder; |
9a5a5549 KW |
4126 | const U8 * fold_array; |
4127 | const char * s; | |
d513472c | 4128 | U32 fold_utf8_flags; |
9a5a5549 | 4129 | |
272d35c9 | 4130 | RX_MATCH_TAINTED_on(reginfo->prog); |
f67f9e53 KW |
4131 | folder = foldEQ_locale; |
4132 | fold_array = PL_fold_locale; | |
17580e7a | 4133 | fold_utf8_flags = FOLDEQ_UTF8_LOCALE; |
9a5a5549 KW |
4134 | goto do_exactf; |
4135 | ||
3c0563b9 DM |
4136 | case EXACTFU_SS: /* /\x{df}/iu */ |
4137 | case EXACTFU_TRICKYFOLD: /* /\x{390}/iu */ | |
4138 | case EXACTFU: /* /abc/iu */ | |
9a5a5549 KW |
4139 | folder = foldEQ_latin1; |
4140 | fold_array = PL_fold_latin1; | |
984e6dd1 | 4141 | fold_utf8_flags = is_utf8_pat ? FOLDEQ_S1_ALREADY_FOLDED : 0; |
9a5a5549 KW |
4142 | goto do_exactf; |
4143 | ||
3c0563b9 | 4144 | case EXACTFA: /* /abc/iaa */ |
2f7f8cb1 KW |
4145 | folder = foldEQ_latin1; |
4146 | fold_array = PL_fold_latin1; | |
57014d77 | 4147 | fold_utf8_flags = FOLDEQ_UTF8_NOMIX_ASCII; |
2f7f8cb1 KW |
4148 | goto do_exactf; |
4149 | ||
3c0563b9 | 4150 | case EXACTF: /* /abc/i */ |
9a5a5549 KW |
4151 | folder = foldEQ; |
4152 | fold_array = PL_fold; | |
62bf7766 | 4153 | fold_utf8_flags = 0; |
9a5a5549 KW |
4154 | |
4155 | do_exactf: | |
4156 | s = STRING(scan); | |
24d3c4a9 | 4157 | ln = STR_LEN(scan); |
d6a28714 | 4158 | |
984e6dd1 | 4159 | if (utf8_target || is_utf8_pat || state_num == EXACTFU_SS) { |
3c760661 KW |
4160 | /* Either target or the pattern are utf8, or has the issue where |
4161 | * the fold lengths may differ. */ | |
be8e71aa | 4162 | const char * const l = locinput; |
d07ddd77 | 4163 | char *e = PL_regeol; |
bc517b45 | 4164 | |
984e6dd1 | 4165 | if (! foldEQ_utf8_flags(s, 0, ln, is_utf8_pat, |
fa5b1667 | 4166 | l, &e, 0, utf8_target, fold_utf8_flags)) |
c3e1d013 KW |
4167 | { |
4168 | sayNO; | |
5486206c | 4169 | } |
d07ddd77 | 4170 | locinput = e; |
d07ddd77 | 4171 | break; |
a0ed51b3 | 4172 | } |
d6a28714 | 4173 | |
0a138b74 | 4174 | /* Neither the target nor the pattern are utf8 */ |
1443c94c DM |
4175 | if (UCHARAT(s) != nextchr |
4176 | && !NEXTCHR_IS_EOS | |
4177 | && UCHARAT(s) != fold_array[nextchr]) | |
9a5a5549 | 4178 | { |
a0ed51b3 | 4179 | sayNO; |
9a5a5549 | 4180 | } |
24d3c4a9 | 4181 | if (PL_regeol - locinput < ln) |
b8c5462f | 4182 | sayNO; |
9a5a5549 | 4183 | if (ln > 1 && ! folder(s, locinput, ln)) |
4633a7c4 | 4184 | sayNO; |
24d3c4a9 | 4185 | locinput += ln; |
a0d0e21e | 4186 | break; |
9a5a5549 | 4187 | } |
63ac0dad KW |
4188 | |
4189 | /* XXX Could improve efficiency by separating these all out using a | |
4190 | * macro or in-line function. At that point regcomp.c would no longer | |
4191 | * have to set the FLAGS fields of these */ | |
3c0563b9 DM |
4192 | case BOUNDL: /* /\b/l */ |
4193 | case NBOUNDL: /* /\B/l */ | |
272d35c9 | 4194 | RX_MATCH_TAINTED_on(reginfo->prog); |
b2680017 | 4195 | /* FALL THROUGH */ |
3c0563b9 DM |
4196 | case BOUND: /* /\b/ */ |
4197 | case BOUNDU: /* /\b/u */ | |
4198 | case BOUNDA: /* /\b/a */ | |
4199 | case NBOUND: /* /\B/ */ | |
4200 | case NBOUNDU: /* /\B/u */ | |
4201 | case NBOUNDA: /* /\B/a */ | |
b2680017 | 4202 | /* was last char in word? */ |
f2e96b5d KW |
4203 | if (utf8_target |
4204 | && FLAGS(scan) != REGEX_ASCII_RESTRICTED_CHARSET | |
4205 | && FLAGS(scan) != REGEX_ASCII_MORE_RESTRICTED_CHARSET) | |
4206 | { | |
b2680017 YO |
4207 | if (locinput == PL_bostr) |
4208 | ln = '\n'; | |
4209 | else { | |
4210 | const U8 * const r = reghop3((U8*)locinput, -1, (U8*)PL_bostr); | |
4211 | ||
4212 | ln = utf8n_to_uvchr(r, UTF8SKIP(r), 0, uniflags); | |
4213 | } | |
63ac0dad | 4214 | if (FLAGS(scan) != REGEX_LOCALE_CHARSET) { |
0eb30aeb | 4215 | ln = isWORDCHAR_uni(ln); |
7016d6eb DM |
4216 | if (NEXTCHR_IS_EOS) |
4217 | n = 0; | |
4218 | else { | |
4219 | LOAD_UTF8_CHARCLASS_ALNUM(); | |
03940dc2 | 4220 | n = swash_fetch(PL_utf8_swash_ptrs[_CC_WORDCHAR], (U8*)locinput, |
7016d6eb DM |
4221 | utf8_target); |
4222 | } | |
b2680017 YO |
4223 | } |
4224 | else { | |
0eb30aeb KW |
4225 | ln = isWORDCHAR_LC_uvchr(UNI_TO_NATIVE(ln)); |
4226 | n = NEXTCHR_IS_EOS ? 0 : isWORDCHAR_LC_utf8((U8*)locinput); | |
b2680017 YO |
4227 | } |
4228 | } | |
4229 | else { | |
cfaf538b KW |
4230 | |
4231 | /* Here the string isn't utf8, or is utf8 and only ascii | |
4232 | * characters are to match \w. In the latter case looking at | |
4233 | * the byte just prior to the current one may be just the final | |
4234 | * byte of a multi-byte character. This is ok. There are two | |
4235 | * cases: | |
4236 | * 1) it is a single byte character, and then the test is doing | |
4237 | * just what it's supposed to. | |
4238 | * 2) it is a multi-byte character, in which case the final | |
4239 | * byte is never mistakable for ASCII, and so the test | |
4240 | * will say it is not a word character, which is the | |
4241 | * correct answer. */ | |
b2680017 YO |
4242 | ln = (locinput != PL_bostr) ? |
4243 | UCHARAT(locinput - 1) : '\n'; | |
63ac0dad KW |
4244 | switch (FLAGS(scan)) { |
4245 | case REGEX_UNICODE_CHARSET: | |
4246 | ln = isWORDCHAR_L1(ln); | |
7016d6eb | 4247 | n = NEXTCHR_IS_EOS ? 0 : isWORDCHAR_L1(nextchr); |
63ac0dad KW |
4248 | break; |
4249 | case REGEX_LOCALE_CHARSET: | |
0eb30aeb KW |
4250 | ln = isWORDCHAR_LC(ln); |
4251 | n = NEXTCHR_IS_EOS ? 0 : isWORDCHAR_LC(nextchr); | |
63ac0dad KW |
4252 | break; |
4253 | case REGEX_DEPENDS_CHARSET: | |
0eb30aeb KW |
4254 | ln = isWORDCHAR(ln); |
4255 | n = NEXTCHR_IS_EOS ? 0 : isWORDCHAR(nextchr); | |
63ac0dad | 4256 | break; |
cfaf538b | 4257 | case REGEX_ASCII_RESTRICTED_CHARSET: |
c973bd4f | 4258 | case REGEX_ASCII_MORE_RESTRICTED_CHARSET: |
cfaf538b | 4259 | ln = isWORDCHAR_A(ln); |
7016d6eb | 4260 | n = NEXTCHR_IS_EOS ? 0 : isWORDCHAR_A(nextchr); |
cfaf538b | 4261 | break; |
63ac0dad KW |
4262 | default: |
4263 | Perl_croak(aTHX_ "panic: Unexpected FLAGS %u in op %u", FLAGS(scan), OP(scan)); | |
4264 | break; | |
b2680017 YO |
4265 | } |
4266 | } | |
63ac0dad KW |
4267 | /* Note requires that all BOUNDs be lower than all NBOUNDs in |
4268 | * regcomp.sym */ | |
4269 | if (((!ln) == (!n)) == (OP(scan) < NBOUND)) | |
b2680017 YO |
4270 | sayNO; |
4271 | break; | |
3c0563b9 | 4272 | |
3c0563b9 | 4273 | case ANYOF: /* /[abc]/ */ |
954a2af6 | 4274 | case ANYOF_WARN_SUPER: |
7016d6eb DM |
4275 | if (NEXTCHR_IS_EOS) |
4276 | sayNO; | |
e0193e47 | 4277 | if (utf8_target) { |
635cd5d4 | 4278 | if (!reginclass(rex, scan, (U8*)locinput, utf8_target)) |
09b08e9b | 4279 | sayNO; |
635cd5d4 | 4280 | locinput += UTF8SKIP(locinput); |
ffc61ed2 JH |
4281 | } |
4282 | else { | |
20ed0b26 | 4283 | if (!REGINCLASS(rex, scan, (U8*)locinput)) |
09b08e9b | 4284 | sayNO; |
3640db6b | 4285 | locinput++; |
e0f9d4a8 | 4286 | } |
b8c5462f | 4287 | break; |
3c0563b9 | 4288 | |
3018b823 KW |
4289 | /* The argument (FLAGS) to all the POSIX node types is the class number |
4290 | * */ | |
ee9a90b8 | 4291 | |
3018b823 KW |
4292 | case NPOSIXL: /* \W or [:^punct:] etc. under /l */ |
4293 | to_complement = 1; | |
4294 | /* FALLTHROUGH */ | |
4295 | ||
4296 | case POSIXL: /* \w or [:punct:] etc. under /l */ | |
4297 | if (NEXTCHR_IS_EOS) | |
bedac28b | 4298 | sayNO; |
bedac28b | 4299 | |
3018b823 KW |
4300 | /* The locale hasn't influenced the outcome before this, so defer |
4301 | * tainting until now */ | |
272d35c9 | 4302 | RX_MATCH_TAINTED_on(reginfo->prog); |
3018b823 KW |
4303 | |
4304 | /* Use isFOO_lc() for characters within Latin1. (Note that | |
4305 | * UTF8_IS_INVARIANT works even on non-UTF-8 strings, or else | |
4306 | * wouldn't be invariant) */ | |
4307 | if (UTF8_IS_INVARIANT(nextchr) || ! utf8_target) { | |
eb4e9c04 | 4308 | if (! (to_complement ^ cBOOL(isFOO_lc(FLAGS(scan), (U8) nextchr)))) { |
bedac28b KW |
4309 | sayNO; |
4310 | } | |
4311 | } | |
3018b823 KW |
4312 | else if (UTF8_IS_DOWNGRADEABLE_START(nextchr)) { |
4313 | if (! (to_complement ^ cBOOL(isFOO_lc(FLAGS(scan), | |
eb4e9c04 | 4314 | (U8) TWO_BYTE_UTF8_TO_UNI(nextchr, |
3018b823 KW |
4315 | *(locinput + 1)))))) |
4316 | { | |
bedac28b | 4317 | sayNO; |
3018b823 | 4318 | } |
bedac28b | 4319 | } |
3018b823 KW |
4320 | else { /* Here, must be an above Latin-1 code point */ |
4321 | goto utf8_posix_not_eos; | |
bedac28b | 4322 | } |
3018b823 KW |
4323 | |
4324 | /* Here, must be utf8 */ | |
4325 | locinput += UTF8SKIP(locinput); | |
bedac28b KW |
4326 | break; |
4327 | ||
3018b823 KW |
4328 | case NPOSIXD: /* \W or [:^punct:] etc. under /d */ |
4329 | to_complement = 1; | |
4330 | /* FALLTHROUGH */ | |
4331 | ||
4332 | case POSIXD: /* \w or [:punct:] etc. under /d */ | |
bedac28b | 4333 | if (utf8_target) { |
3018b823 | 4334 | goto utf8_posix; |
bedac28b | 4335 | } |
3018b823 KW |
4336 | goto posixa; |
4337 | ||
4338 | case NPOSIXA: /* \W or [:^punct:] etc. under /a */ | |
bedac28b | 4339 | |
3018b823 | 4340 | if (NEXTCHR_IS_EOS) { |
bedac28b KW |
4341 | sayNO; |
4342 | } | |
bedac28b | 4343 | |
3018b823 KW |
4344 | /* All UTF-8 variants match */ |
4345 | if (! UTF8_IS_INVARIANT(nextchr)) { | |
4346 | goto increment_locinput; | |
bedac28b | 4347 | } |
ee9a90b8 | 4348 | |
3018b823 KW |
4349 | to_complement = 1; |
4350 | /* FALLTHROUGH */ | |
4351 | ||
4352 | case POSIXA: /* \w or [:punct:] etc. under /a */ | |
4353 | ||
4354 | posixa: | |
4355 | /* We get here through POSIXD, NPOSIXD, and NPOSIXA when not in | |
4356 | * UTF-8, and also from NPOSIXA even in UTF-8 when the current | |
4357 | * character is a single byte */ | |
20d0b1e9 | 4358 | |
3018b823 KW |
4359 | if (NEXTCHR_IS_EOS |
4360 | || ! (to_complement ^ cBOOL(_generic_isCC_A(nextchr, | |
4361 | FLAGS(scan))))) | |
4362 | { | |
0658cdde KW |
4363 | sayNO; |
4364 | } | |
3018b823 KW |
4365 | |
4366 | /* Here we are either not in utf8, or we matched a utf8-invariant, | |
4367 | * so the next char is the next byte */ | |
3640db6b | 4368 | locinput++; |
0658cdde | 4369 | break; |
3c0563b9 | 4370 | |
3018b823 KW |
4371 | case NPOSIXU: /* \W or [:^punct:] etc. under /u */ |
4372 | to_complement = 1; | |
4373 | /* FALLTHROUGH */ | |
4374 | ||
4375 | case POSIXU: /* \w or [:punct:] etc. under /u */ | |
4376 | utf8_posix: | |
4377 | if (NEXTCHR_IS_EOS) { | |
0658cdde KW |
4378 | sayNO; |
4379 | } | |
3018b823 KW |
4380 | utf8_posix_not_eos: |
4381 | ||
4382 | /* Use _generic_isCC() for characters within Latin1. (Note that | |
4383 | * UTF8_IS_INVARIANT works even on non-UTF-8 strings, or else | |
4384 | * wouldn't be invariant) */ | |
4385 | if (UTF8_IS_INVARIANT(nextchr) || ! utf8_target) { | |
4386 | if (! (to_complement ^ cBOOL(_generic_isCC(nextchr, | |
4387 | FLAGS(scan))))) | |
4388 | { | |
4389 | sayNO; | |
4390 | } | |
4391 | locinput++; | |
4392 | } | |
4393 | else if (UTF8_IS_DOWNGRADEABLE_START(nextchr)) { | |
4394 | if (! (to_complement | |
4395 | ^ cBOOL(_generic_isCC(TWO_BYTE_UTF8_TO_UNI(nextchr, | |
4396 | *(locinput + 1)), | |
4397 | FLAGS(scan))))) | |
4398 | { | |
4399 | sayNO; | |
4400 | } | |
4401 | locinput += 2; | |
4402 | } | |
4403 | else { /* Handle above Latin-1 code points */ | |
4404 | classnum = (_char_class_number) FLAGS(scan); | |
4405 | if (classnum < _FIRST_NON_SWASH_CC) { | |
4406 | ||
4407 | /* Here, uses a swash to find such code points. Load if if | |
4408 | * not done already */ | |
4409 | if (! PL_utf8_swash_ptrs[classnum]) { | |
4410 | U8 flags = _CORE_SWASH_INIT_ACCEPT_INVLIST; | |
4411 | PL_utf8_swash_ptrs[classnum] | |
4412 | = _core_swash_init("utf8", | |
4413 | swash_property_names[classnum], | |
4414 | &PL_sv_undef, 1, 0, NULL, &flags); | |
4415 | } | |
4416 | if (! (to_complement | |
4417 | ^ cBOOL(swash_fetch(PL_utf8_swash_ptrs[classnum], | |
4418 | (U8 *) locinput, TRUE)))) | |
4419 | { | |
4420 | sayNO; | |
4421 | } | |
4422 | } | |
4423 | else { /* Here, uses macros to find above Latin-1 code points */ | |
4424 | switch (classnum) { | |
4425 | case _CC_ENUM_SPACE: /* XXX would require separate | |
4426 | code if we revert the change | |
4427 | of \v matching this */ | |
4428 | case _CC_ENUM_PSXSPC: | |
4429 | if (! (to_complement | |
4430 | ^ cBOOL(is_XPERLSPACE_high(locinput)))) | |
4431 | { | |
4432 | sayNO; | |
4433 | } | |
4434 | break; | |
4435 | case _CC_ENUM_BLANK: | |
4436 | if (! (to_complement | |
4437 | ^ cBOOL(is_HORIZWS_high(locinput)))) | |
4438 | { | |
4439 | sayNO; | |
4440 | } | |
4441 | break; | |
4442 | case _CC_ENUM_XDIGIT: | |
4443 | if (! (to_complement | |
4444 | ^ cBOOL(is_XDIGIT_high(locinput)))) | |
4445 | { | |
4446 | sayNO; | |
4447 | } | |
4448 | break; | |
4449 | case _CC_ENUM_VERTSPACE: | |
4450 | if (! (to_complement | |
4451 | ^ cBOOL(is_VERTWS_high(locinput)))) | |
4452 | { | |
4453 | sayNO; | |
4454 | } | |
4455 | break; | |
4456 | default: /* The rest, e.g. [:cntrl:], can't match | |
4457 | above Latin1 */ | |
4458 | if (! to_complement) { | |
4459 | sayNO; | |
4460 | } | |
4461 | break; | |
4462 | } | |
4463 | } | |
4464 | locinput += UTF8SKIP(locinput); | |
4465 | } | |
4466 | break; | |
0658cdde | 4467 | |
37e2e78e KW |
4468 | case CLUMP: /* Match \X: logical Unicode character. This is defined as |
4469 | a Unicode extended Grapheme Cluster */ | |
4470 | /* From http://www.unicode.org/reports/tr29 (5.2 version). An | |
4471 | extended Grapheme Cluster is: | |
4472 | ||
7aee35ff KW |
4473 | CR LF |
4474 | | Prepend* Begin Extend* | |
4475 | | . | |
37e2e78e | 4476 | |
7aee35ff KW |
4477 | Begin is: ( Special_Begin | ! Control ) |
4478 | Special_Begin is: ( Regional-Indicator+ | Hangul-syllable ) | |
4479 | Extend is: ( Grapheme_Extend | Spacing_Mark ) | |
4480 | Control is: [ GCB_Control | CR | LF ] | |
4481 | Hangul-syllable is: ( T+ | ( L* ( L | ( LVT | ( V | LV ) V* ) T* ) )) | |
37e2e78e | 4482 | |
27d4fc33 KW |
4483 | If we create a 'Regular_Begin' = Begin - Special_Begin, then |
4484 | we can rewrite | |
4485 | ||
4486 | Begin is ( Regular_Begin + Special Begin ) | |
4487 | ||
4488 | It turns out that 98.4% of all Unicode code points match | |
4489 | Regular_Begin. Doing it this way eliminates a table match in | |
c101f46d | 4490 | the previous implementation for almost all Unicode code points. |
27d4fc33 | 4491 | |
37e2e78e KW |
4492 | There is a subtlety with Prepend* which showed up in testing. |
4493 | Note that the Begin, and only the Begin is required in: | |
4494 | | Prepend* Begin Extend* | |
cc3b396d KW |
4495 | Also, Begin contains '! Control'. A Prepend must be a |
4496 | '! Control', which means it must also be a Begin. What it | |
4497 | comes down to is that if we match Prepend* and then find no | |
4498 | suitable Begin afterwards, that if we backtrack the last | |
4499 | Prepend, that one will be a suitable Begin. | |
37e2e78e KW |
4500 | */ |
4501 | ||
7016d6eb | 4502 | if (NEXTCHR_IS_EOS) |
a0ed51b3 | 4503 | sayNO; |
f2ed9b32 | 4504 | if (! utf8_target) { |
37e2e78e KW |
4505 | |
4506 | /* Match either CR LF or '.', as all the other possibilities | |
4507 | * require utf8 */ | |
4508 | locinput++; /* Match the . or CR */ | |
cc3b396d KW |
4509 | if (nextchr == '\r' /* And if it was CR, and the next is LF, |
4510 | match the LF */ | |
37e2e78e | 4511 | && locinput < PL_regeol |
e699a1d5 KW |
4512 | && UCHARAT(locinput) == '\n') |
4513 | { | |
4514 | locinput++; | |
4515 | } | |
37e2e78e KW |
4516 | } |
4517 | else { | |
4518 | ||
4519 | /* Utf8: See if is ( CR LF ); already know that locinput < | |
4520 | * PL_regeol, so locinput+1 is in bounds */ | |
7016d6eb | 4521 | if ( nextchr == '\r' && locinput+1 < PL_regeol |
f67f9e53 | 4522 | && UCHARAT(locinput + 1) == '\n') |
7016d6eb | 4523 | { |
37e2e78e KW |
4524 | locinput += 2; |
4525 | } | |
4526 | else { | |
45fdf108 KW |
4527 | STRLEN len; |
4528 | ||
37e2e78e KW |
4529 | /* In case have to backtrack to beginning, then match '.' */ |
4530 | char *starting = locinput; | |
4531 | ||
4532 | /* In case have to backtrack the last prepend */ | |
e699a1d5 | 4533 | char *previous_prepend = NULL; |
37e2e78e KW |
4534 | |
4535 | LOAD_UTF8_CHARCLASS_GCB(); | |
4536 | ||
45fdf108 KW |
4537 | /* Match (prepend)* */ |
4538 | while (locinput < PL_regeol | |
4539 | && (len = is_GCB_Prepend_utf8(locinput))) | |
4540 | { | |
4541 | previous_prepend = locinput; | |
4542 | locinput += len; | |
a1853d78 | 4543 | } |
37e2e78e KW |
4544 | |
4545 | /* As noted above, if we matched a prepend character, but | |
4546 | * the next thing won't match, back off the last prepend we | |
4547 | * matched, as it is guaranteed to match the begin */ | |
4548 | if (previous_prepend | |
4549 | && (locinput >= PL_regeol | |
c101f46d KW |
4550 | || (! swash_fetch(PL_utf8_X_regular_begin, |
4551 | (U8*)locinput, utf8_target) | |
bff53399 | 4552 | && ! is_GCB_SPECIAL_BEGIN_START_utf8(locinput))) |
c101f46d | 4553 | ) |
37e2e78e KW |
4554 | { |
4555 | locinput = previous_prepend; | |
4556 | } | |
4557 | ||
4558 | /* Note that here we know PL_regeol > locinput, as we | |
4559 | * tested that upon input to this switch case, and if we | |
4560 | * moved locinput forward, we tested the result just above | |
4561 | * and it either passed, or we backed off so that it will | |
4562 | * now pass */ | |
11dfcd49 KW |
4563 | if (swash_fetch(PL_utf8_X_regular_begin, |
4564 | (U8*)locinput, utf8_target)) { | |
27d4fc33 KW |
4565 | locinput += UTF8SKIP(locinput); |
4566 | } | |
bff53399 | 4567 | else if (! is_GCB_SPECIAL_BEGIN_START_utf8(locinput)) { |
37e2e78e KW |
4568 | |
4569 | /* Here did not match the required 'Begin' in the | |
4570 | * second term. So just match the very first | |
4571 | * character, the '.' of the final term of the regex */ | |
4572 | locinput = starting + UTF8SKIP(starting); | |
27d4fc33 | 4573 | goto exit_utf8; |
37e2e78e KW |
4574 | } else { |
4575 | ||
11dfcd49 KW |
4576 | /* Here is a special begin. It can be composed of |
4577 | * several individual characters. One possibility is | |
4578 | * RI+ */ | |
45fdf108 KW |
4579 | if ((len = is_GCB_RI_utf8(locinput))) { |
4580 | locinput += len; | |
11dfcd49 | 4581 | while (locinput < PL_regeol |
45fdf108 | 4582 | && (len = is_GCB_RI_utf8(locinput))) |
11dfcd49 | 4583 | { |
45fdf108 | 4584 | locinput += len; |
11dfcd49 | 4585 | } |
45fdf108 KW |
4586 | } else if ((len = is_GCB_T_utf8(locinput))) { |
4587 | /* Another possibility is T+ */ | |
4588 | locinput += len; | |
11dfcd49 | 4589 | while (locinput < PL_regeol |
45fdf108 | 4590 | && (len = is_GCB_T_utf8(locinput))) |
11dfcd49 | 4591 | { |
45fdf108 | 4592 | locinput += len; |
11dfcd49 KW |
4593 | } |
4594 | } else { | |
4595 | ||
4596 | /* Here, neither RI+ nor T+; must be some other | |
4597 | * Hangul. That means it is one of the others: L, | |
4598 | * LV, LVT or V, and matches: | |
4599 | * L* (L | LVT T* | V * V* T* | LV V* T*) */ | |
4600 | ||
4601 | /* Match L* */ | |
4602 | while (locinput < PL_regeol | |
45fdf108 | 4603 | && (len = is_GCB_L_utf8(locinput))) |
11dfcd49 | 4604 | { |
45fdf108 | 4605 | locinput += len; |
11dfcd49 | 4606 | } |
37e2e78e | 4607 | |
11dfcd49 KW |
4608 | /* Here, have exhausted L*. If the next character |
4609 | * is not an LV, LVT nor V, it means we had to have | |
4610 | * at least one L, so matches L+ in the original | |
4611 | * equation, we have a complete hangul syllable. | |
4612 | * Are done. */ | |
4613 | ||
4614 | if (locinput < PL_regeol | |
45fdf108 | 4615 | && is_GCB_LV_LVT_V_utf8(locinput)) |
11dfcd49 | 4616 | { |
11dfcd49 | 4617 | /* Otherwise keep going. Must be LV, LVT or V. |
7d43c479 KW |
4618 | * See if LVT, by first ruling out V, then LV */ |
4619 | if (! is_GCB_V_utf8(locinput) | |
4620 | /* All but every TCount one is LV */ | |
4621 | && (valid_utf8_to_uvchr((U8 *) locinput, | |
4622 | NULL) | |
4623 | - SBASE) | |
4624 | % TCount != 0) | |
4625 | { | |
11dfcd49 KW |
4626 | locinput += UTF8SKIP(locinput); |
4627 | } else { | |
4628 | ||
4629 | /* Must be V or LV. Take it, then match | |
4630 | * V* */ | |
4631 | locinput += UTF8SKIP(locinput); | |
4632 | while (locinput < PL_regeol | |
45fdf108 | 4633 | && (len = is_GCB_V_utf8(locinput))) |
11dfcd49 | 4634 | { |
45fdf108 | 4635 | locinput += len; |
11dfcd49 KW |
4636 | } |
4637 | } | |
37e2e78e | 4638 | |
11dfcd49 | 4639 | /* And any of LV, LVT, or V can be followed |
45fdf108 | 4640 | * by T* */ |
11dfcd49 | 4641 | while (locinput < PL_regeol |
45fdf108 | 4642 | && (len = is_GCB_T_utf8(locinput))) |
11dfcd49 | 4643 | { |
45fdf108 | 4644 | locinput += len; |
11dfcd49 KW |
4645 | } |
4646 | } | |
cd94d768 | 4647 | } |
11dfcd49 | 4648 | } |
37e2e78e | 4649 | |
11dfcd49 KW |
4650 | /* Match any extender */ |
4651 | while (locinput < PL_regeol | |
4652 | && swash_fetch(PL_utf8_X_extend, | |
4653 | (U8*)locinput, utf8_target)) | |
4654 | { | |
4655 | locinput += UTF8SKIP(locinput); | |
4656 | } | |
37e2e78e | 4657 | } |
27d4fc33 | 4658 | exit_utf8: |
37e2e78e KW |
4659 | if (locinput > PL_regeol) sayNO; |
4660 | } | |
a0ed51b3 | 4661 | break; |
81714fb9 | 4662 | |
3c0563b9 | 4663 | case NREFFL: /* /\g{name}/il */ |
d7ef4b73 KW |
4664 | { /* The capture buffer cases. The ones beginning with N for the |
4665 | named buffers just convert to the equivalent numbered and | |
4666 | pretend they were called as the corresponding numbered buffer | |
4667 | op. */ | |
26ecd678 TC |
4668 | /* don't initialize these in the declaration, it makes C++ |
4669 | unhappy */ | |
81714fb9 | 4670 | char *s; |
ff1157ca | 4671 | char type; |
8368298a TC |
4672 | re_fold_t folder; |
4673 | const U8 *fold_array; | |
26ecd678 | 4674 | UV utf8_fold_flags; |
8368298a | 4675 | |
272d35c9 | 4676 | RX_MATCH_TAINTED_on(reginfo->prog); |
d7ef4b73 KW |
4677 | folder = foldEQ_locale; |
4678 | fold_array = PL_fold_locale; | |
4679 | type = REFFL; | |
17580e7a | 4680 | utf8_fold_flags = FOLDEQ_UTF8_LOCALE; |
d7ef4b73 KW |
4681 | goto do_nref; |
4682 | ||
3c0563b9 | 4683 | case NREFFA: /* /\g{name}/iaa */ |
2f7f8cb1 KW |
4684 | folder = foldEQ_latin1; |
4685 | fold_array = PL_fold_latin1; | |
4686 | type = REFFA; | |
4687 | utf8_fold_flags = FOLDEQ_UTF8_NOMIX_ASCII; | |
4688 | goto do_nref; | |
4689 | ||
3c0563b9 | 4690 | case NREFFU: /* /\g{name}/iu */ |
d7ef4b73 KW |
4691 | folder = foldEQ_latin1; |
4692 | fold_array = PL_fold_latin1; | |
4693 | type = REFFU; | |
d513472c | 4694 | utf8_fold_flags = 0; |
d7ef4b73 KW |
4695 | goto do_nref; |
4696 | ||
3c0563b9 | 4697 | case NREFF: /* /\g{name}/i */ |
d7ef4b73 KW |
4698 | folder = foldEQ; |
4699 | fold_array = PL_fold; | |
4700 | type = REFF; | |
d513472c | 4701 | utf8_fold_flags = 0; |
d7ef4b73 KW |
4702 | goto do_nref; |
4703 | ||
3c0563b9 | 4704 | case NREF: /* /\g{name}/ */ |
d7ef4b73 | 4705 | type = REF; |
83d7b90b KW |
4706 | folder = NULL; |
4707 | fold_array = NULL; | |
d513472c | 4708 | utf8_fold_flags = 0; |
d7ef4b73 KW |
4709 | do_nref: |
4710 | ||
4711 | /* For the named back references, find the corresponding buffer | |
4712 | * number */ | |
0a4db386 YO |
4713 | n = reg_check_named_buff_matched(rex,scan); |
4714 | ||
d7ef4b73 | 4715 | if ( ! n ) { |
81714fb9 | 4716 | sayNO; |
d7ef4b73 KW |
4717 | } |
4718 | goto do_nref_ref_common; | |
4719 | ||
3c0563b9 | 4720 | case REFFL: /* /\1/il */ |
272d35c9 | 4721 | RX_MATCH_TAINTED_on(reginfo->prog); |
d7ef4b73 KW |
4722 | folder = foldEQ_locale; |
4723 | fold_array = PL_fold_locale; | |
17580e7a | 4724 | utf8_fold_flags = FOLDEQ_UTF8_LOCALE; |
d7ef4b73 KW |
4725 | goto do_ref; |
4726 | ||
3c0563b9 | 4727 | case REFFA: /* /\1/iaa */ |
2f7f8cb1 KW |
4728 | folder = foldEQ_latin1; |
4729 | fold_array = PL_fold_latin1; | |
4730 | utf8_fold_flags = FOLDEQ_UTF8_NOMIX_ASCII; | |
4731 | goto do_ref; | |
4732 | ||
3c0563b9 | 4733 | case REFFU: /* /\1/iu */ |
d7ef4b73 KW |
4734 | folder = foldEQ_latin1; |
4735 | fold_array = PL_fold_latin1; | |
d513472c | 4736 | utf8_fold_flags = 0; |
d7ef4b73 KW |
4737 | goto do_ref; |
4738 | ||
3c0563b9 | 4739 | case REFF: /* /\1/i */ |
d7ef4b73 KW |
4740 | folder = foldEQ; |
4741 | fold_array = PL_fold; | |
d513472c | 4742 | utf8_fold_flags = 0; |
83d7b90b | 4743 | goto do_ref; |
d7ef4b73 | 4744 | |
3c0563b9 | 4745 | case REF: /* /\1/ */ |
83d7b90b KW |
4746 | folder = NULL; |
4747 | fold_array = NULL; | |
d513472c | 4748 | utf8_fold_flags = 0; |
83d7b90b | 4749 | |
d7ef4b73 | 4750 | do_ref: |
81714fb9 | 4751 | type = OP(scan); |
d7ef4b73 KW |
4752 | n = ARG(scan); /* which paren pair */ |
4753 | ||
4754 | do_nref_ref_common: | |
b93070ed | 4755 | ln = rex->offs[n].start; |
2c2d71f5 | 4756 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
b93070ed | 4757 | if (rex->lastparen < n || ln == -1) |
af3f8c16 | 4758 | sayNO; /* Do not match unless seen CLOSEn. */ |
b93070ed | 4759 | if (ln == rex->offs[n].end) |
a0d0e21e | 4760 | break; |
a0ed51b3 | 4761 | |
24d3c4a9 | 4762 | s = PL_bostr + ln; |
d7ef4b73 | 4763 | if (type != REF /* REF can do byte comparison */ |
2f65c56d | 4764 | && (utf8_target || type == REFFU)) |
d7ef4b73 KW |
4765 | { /* XXX handle REFFL better */ |
4766 | char * limit = PL_regeol; | |
4767 | ||
4768 | /* This call case insensitively compares the entire buffer | |
4769 | * at s, with the current input starting at locinput, but | |
4770 | * not going off the end given by PL_regeol, and returns in | |
2db97d41 | 4771 | * <limit> upon success, how much of the current input was |
d7ef4b73 | 4772 | * matched */ |
b93070ed | 4773 | if (! foldEQ_utf8_flags(s, NULL, rex->offs[n].end - ln, utf8_target, |
d513472c | 4774 | locinput, &limit, 0, utf8_target, utf8_fold_flags)) |
d7ef4b73 KW |
4775 | { |
4776 | sayNO; | |
a0ed51b3 | 4777 | } |
d7ef4b73 | 4778 | locinput = limit; |
a0ed51b3 LW |
4779 | break; |
4780 | } | |
4781 | ||
d7ef4b73 | 4782 | /* Not utf8: Inline the first character, for speed. */ |
7016d6eb DM |
4783 | if (!NEXTCHR_IS_EOS && |
4784 | UCHARAT(s) != nextchr && | |
81714fb9 | 4785 | (type == REF || |
d7ef4b73 | 4786 | UCHARAT(s) != fold_array[nextchr])) |
4633a7c4 | 4787 | sayNO; |
b93070ed | 4788 | ln = rex->offs[n].end - ln; |
24d3c4a9 | 4789 | if (locinput + ln > PL_regeol) |
4633a7c4 | 4790 | sayNO; |
81714fb9 | 4791 | if (ln > 1 && (type == REF |
24d3c4a9 | 4792 | ? memNE(s, locinput, ln) |
d7ef4b73 | 4793 | : ! folder(s, locinput, ln))) |
4633a7c4 | 4794 | sayNO; |
24d3c4a9 | 4795 | locinput += ln; |
a0d0e21e | 4796 | break; |
81714fb9 | 4797 | } |
3c0563b9 DM |
4798 | |
4799 | case NOTHING: /* null op; e.g. the 'nothing' following | |
4800 | * the '*' in m{(a+|b)*}' */ | |
4801 | break; | |
4802 | case TAIL: /* placeholder while compiling (A|B|C) */ | |
a0d0e21e | 4803 | break; |
3c0563b9 DM |
4804 | |
4805 | case BACK: /* ??? doesn't appear to be used ??? */ | |
a0d0e21e | 4806 | break; |
40a82448 DM |
4807 | |
4808 | #undef ST | |
4809 | #define ST st->u.eval | |
c277df42 | 4810 | { |
c277df42 | 4811 | SV *ret; |
d2f13c59 | 4812 | REGEXP *re_sv; |
6bda09f9 | 4813 | regexp *re; |
f8fc2ecf | 4814 | regexp_internal *rei; |
1a147d38 YO |
4815 | regnode *startpoint; |
4816 | ||
3c0563b9 | 4817 | case GOSTART: /* (?R) */ |
e7707071 YO |
4818 | case GOSUB: /* /(...(?1))/ /(...(?&foo))/ */ |
4819 | if (cur_eval && cur_eval->locinput==locinput) { | |
24b23f37 | 4820 | if (cur_eval->u.eval.close_paren == (U32)ARG(scan)) |
1a147d38 | 4821 | Perl_croak(aTHX_ "Infinite recursion in regex"); |
4b196cd4 | 4822 | if ( ++nochange_depth > max_nochange_depth ) |
1a147d38 YO |
4823 | Perl_croak(aTHX_ |
4824 | "Pattern subroutine nesting without pos change" | |
4825 | " exceeded limit in regex"); | |
6bda09f9 YO |
4826 | } else { |
4827 | nochange_depth = 0; | |
1a147d38 | 4828 | } |
288b8c02 | 4829 | re_sv = rex_sv; |
6bda09f9 | 4830 | re = rex; |
f8fc2ecf | 4831 | rei = rexi; |
1a147d38 | 4832 | if (OP(scan)==GOSUB) { |
6bda09f9 YO |
4833 | startpoint = scan + ARG2L(scan); |
4834 | ST.close_paren = ARG(scan); | |
4835 | } else { | |
f8fc2ecf | 4836 | startpoint = rei->program+1; |
6bda09f9 YO |
4837 | ST.close_paren = 0; |
4838 | } | |
4839 | goto eval_recurse_doit; | |
118e2215 | 4840 | assert(0); /* NOTREACHED */ |
3c0563b9 | 4841 | |
6bda09f9 YO |
4842 | case EVAL: /* /(?{A})B/ /(??{A})B/ and /(?(?{A})X|Y)B/ */ |
4843 | if (cur_eval && cur_eval->locinput==locinput) { | |
4b196cd4 | 4844 | if ( ++nochange_depth > max_nochange_depth ) |
1a147d38 | 4845 | Perl_croak(aTHX_ "EVAL without pos change exceeded limit in regex"); |
6bda09f9 YO |
4846 | } else { |
4847 | nochange_depth = 0; | |
4848 | } | |
8e5e9ebe | 4849 | { |
4aabdb9b | 4850 | /* execute the code in the {...} */ |
81ed78b2 | 4851 | |
4aabdb9b | 4852 | dSP; |
a6dc34f1 | 4853 | IV before; |
1f4d1a1e | 4854 | OP * const oop = PL_op; |
4aabdb9b | 4855 | COP * const ocurcop = PL_curcop; |
81ed78b2 | 4856 | OP *nop; |
d80618d2 | 4857 | char *saved_regeol = PL_regeol; |
91332126 | 4858 | struct re_save_state saved_state; |
81ed78b2 | 4859 | CV *newcv; |
91332126 | 4860 | |
74088413 | 4861 | /* save *all* paren positions */ |
92da3157 | 4862 | regcppush(rex, 0, maxopenparen); |
74088413 DM |
4863 | REGCP_SET(runops_cp); |
4864 | ||
6562f1c4 | 4865 | /* To not corrupt the existing regex state while executing the |
b7f4cd04 FR |
4866 | * eval we would normally put it on the save stack, like with |
4867 | * save_re_context. However, re-evals have a weird scoping so we | |
4868 | * can't just add ENTER/LEAVE here. With that, things like | |
4869 | * | |
4870 | * (?{$a=2})(a(?{local$a=$a+1}))*aak*c(?{$b=$a}) | |
4871 | * | |
4872 | * would break, as they expect the localisation to be unwound | |
4873 | * only when the re-engine backtracks through the bit that | |
4874 | * localised it. | |
4875 | * | |
4876 | * What we do instead is just saving the state in a local c | |
4877 | * variable. | |
4878 | */ | |
91332126 | 4879 | Copy(&PL_reg_state, &saved_state, 1, struct re_save_state); |
81ed78b2 | 4880 | |
81ed78b2 DM |
4881 | if (!caller_cv) |
4882 | caller_cv = find_runcv(NULL); | |
4883 | ||
4aabdb9b | 4884 | n = ARG(scan); |
81ed78b2 | 4885 | |
b30fcab9 | 4886 | if (rexi->data->what[n] == 'r') { /* code from an external qr */ |
8d919b0a | 4887 | newcv = (ReANY( |
b30fcab9 DM |
4888 | (REGEXP*)(rexi->data->data[n]) |
4889 | ))->qr_anoncv | |
81ed78b2 DM |
4890 | ; |
4891 | nop = (OP*)rexi->data->data[n+1]; | |
b30fcab9 DM |
4892 | } |
4893 | else if (rexi->data->what[n] == 'l') { /* literal code */ | |
81ed78b2 DM |
4894 | newcv = caller_cv; |
4895 | nop = (OP*)rexi->data->data[n]; | |
4896 | assert(CvDEPTH(newcv)); | |
68e2671b DM |
4897 | } |
4898 | else { | |
d24ca0c5 DM |
4899 | /* literal with own CV */ |
4900 | assert(rexi->data->what[n] == 'L'); | |
81ed78b2 DM |
4901 | newcv = rex->qr_anoncv; |
4902 | nop = (OP*)rexi->data->data[n]; | |
68e2671b | 4903 | } |
81ed78b2 | 4904 | |
0e458318 DM |
4905 | /* normally if we're about to execute code from the same |
4906 | * CV that we used previously, we just use the existing | |
4907 | * CX stack entry. However, its possible that in the | |
4908 | * meantime we may have backtracked, popped from the save | |
4909 | * stack, and undone the SAVECOMPPAD(s) associated with | |
4910 | * PUSH_MULTICALL; in which case PL_comppad no longer | |
4911 | * points to newcv's pad. */ | |
4912 | if (newcv != last_pushed_cv || PL_comppad != last_pad) | |
4913 | { | |
b0065247 DM |
4914 | U8 flags = (CXp_SUB_RE | |
4915 | ((newcv == caller_cv) ? CXp_SUB_RE_FAKE : 0)); | |
0e458318 | 4916 | if (last_pushed_cv) { |
b0065247 | 4917 | CHANGE_MULTICALL_FLAGS(newcv, flags); |
0e458318 DM |
4918 | } |
4919 | else { | |
b0065247 | 4920 | PUSH_MULTICALL_FLAGS(newcv, flags); |
0e458318 DM |
4921 | } |
4922 | last_pushed_cv = newcv; | |
4923 | } | |
c31ee3bb DM |
4924 | else { |
4925 | /* these assignments are just to silence compiler | |
4926 | * warnings */ | |
4927 | multicall_cop = NULL; | |
4928 | newsp = NULL; | |
4929 | } | |
0e458318 DM |
4930 | last_pad = PL_comppad; |
4931 | ||
2e2e3f36 DM |
4932 | /* the initial nextstate you would normally execute |
4933 | * at the start of an eval (which would cause error | |
4934 | * messages to come from the eval), may be optimised | |
4935 | * away from the execution path in the regex code blocks; | |
4936 | * so manually set PL_curcop to it initially */ | |
4937 | { | |
81ed78b2 | 4938 | OP *o = cUNOPx(nop)->op_first; |
2e2e3f36 DM |
4939 | assert(o->op_type == OP_NULL); |
4940 | if (o->op_targ == OP_SCOPE) { | |
4941 | o = cUNOPo->op_first; | |
4942 | } | |
4943 | else { | |
4944 | assert(o->op_targ == OP_LEAVE); | |
4945 | o = cUNOPo->op_first; | |
4946 | assert(o->op_type == OP_ENTER); | |
4947 | o = o->op_sibling; | |
4948 | } | |
4949 | ||
4950 | if (o->op_type != OP_STUB) { | |
4951 | assert( o->op_type == OP_NEXTSTATE | |
4952 | || o->op_type == OP_DBSTATE | |
4953 | || (o->op_type == OP_NULL | |
4954 | && ( o->op_targ == OP_NEXTSTATE | |
4955 | || o->op_targ == OP_DBSTATE | |
4956 | ) | |
4957 | ) | |
4958 | ); | |
4959 | PL_curcop = (COP*)o; | |
4960 | } | |
4961 | } | |
81ed78b2 | 4962 | nop = nop->op_next; |
2e2e3f36 | 4963 | |
24b23f37 | 4964 | DEBUG_STATE_r( PerlIO_printf(Perl_debug_log, |
81ed78b2 DM |
4965 | " re EVAL PL_op=0x%"UVxf"\n", PTR2UV(nop)) ); |
4966 | ||
b93070ed | 4967 | rex->offs[0].end = PL_reg_magic->mg_len = locinput - PL_bostr; |
4aabdb9b | 4968 | |
2bf803e2 YO |
4969 | if (sv_yes_mark) { |
4970 | SV *sv_mrk = get_sv("REGMARK", 1); | |
4971 | sv_setsv(sv_mrk, sv_yes_mark); | |
4972 | } | |
4973 | ||
81ed78b2 DM |
4974 | /* we don't use MULTICALL here as we want to call the |
4975 | * first op of the block of interest, rather than the | |
4976 | * first op of the sub */ | |
a6dc34f1 | 4977 | before = (IV)(SP-PL_stack_base); |
81ed78b2 | 4978 | PL_op = nop; |
8e5e9ebe RGS |
4979 | CALLRUNOPS(aTHX); /* Scalar context. */ |
4980 | SPAGAIN; | |
a6dc34f1 | 4981 | if ((IV)(SP-PL_stack_base) == before) |
075aa684 | 4982 | ret = &PL_sv_undef; /* protect against empty (?{}) blocks. */ |
8e5e9ebe RGS |
4983 | else { |
4984 | ret = POPs; | |
4985 | PUTBACK; | |
4986 | } | |
4aabdb9b | 4987 | |
e4bfbed3 DM |
4988 | /* before restoring everything, evaluate the returned |
4989 | * value, so that 'uninit' warnings don't use the wrong | |
497d0a96 DM |
4990 | * PL_op or pad. Also need to process any magic vars |
4991 | * (e.g. $1) *before* parentheses are restored */ | |
e4bfbed3 DM |
4992 | |
4993 | PL_op = NULL; | |
4994 | ||
5e98dac2 | 4995 | re_sv = NULL; |
e4bfbed3 DM |
4996 | if (logical == 0) /* (?{})/ */ |
4997 | sv_setsv(save_scalar(PL_replgv), ret); /* $^R */ | |
4998 | else if (logical == 1) { /* /(?(?{...})X|Y)/ */ | |
4999 | sw = cBOOL(SvTRUE(ret)); | |
5000 | logical = 0; | |
5001 | } | |
5002 | else { /* /(??{}) */ | |
497d0a96 DM |
5003 | /* if its overloaded, let the regex compiler handle |
5004 | * it; otherwise extract regex, or stringify */ | |
5005 | if (!SvAMAGIC(ret)) { | |
5006 | SV *sv = ret; | |
5007 | if (SvROK(sv)) | |
5008 | sv = SvRV(sv); | |
5009 | if (SvTYPE(sv) == SVt_REGEXP) | |
5010 | re_sv = (REGEXP*) sv; | |
5011 | else if (SvSMAGICAL(sv)) { | |
5012 | MAGIC *mg = mg_find(sv, PERL_MAGIC_qr); | |
5013 | if (mg) | |
5014 | re_sv = (REGEXP *) mg->mg_obj; | |
5015 | } | |
e4bfbed3 | 5016 | |
497d0a96 DM |
5017 | /* force any magic, undef warnings here */ |
5018 | if (!re_sv) { | |
5019 | ret = sv_mortalcopy(ret); | |
5020 | (void) SvPV_force_nolen(ret); | |
5021 | } | |
e4bfbed3 DM |
5022 | } |
5023 | ||
5024 | } | |
5025 | ||
91332126 FR |
5026 | Copy(&saved_state, &PL_reg_state, 1, struct re_save_state); |
5027 | ||
81ed78b2 DM |
5028 | /* *** Note that at this point we don't restore |
5029 | * PL_comppad, (or pop the CxSUB) on the assumption it may | |
5030 | * be used again soon. This is safe as long as nothing | |
5031 | * in the regexp code uses the pad ! */ | |
4aabdb9b | 5032 | PL_op = oop; |
4aabdb9b | 5033 | PL_curcop = ocurcop; |
d80618d2 | 5034 | PL_regeol = saved_regeol; |
92da3157 | 5035 | S_regcp_restore(aTHX_ rex, runops_cp, &maxopenparen); |
e4bfbed3 DM |
5036 | |
5037 | if (logical != 2) | |
4aabdb9b | 5038 | break; |
8e5e9ebe | 5039 | } |
e4bfbed3 DM |
5040 | |
5041 | /* only /(??{})/ from now on */ | |
24d3c4a9 | 5042 | logical = 0; |
4aabdb9b | 5043 | { |
4f639d21 DM |
5044 | /* extract RE object from returned value; compiling if |
5045 | * necessary */ | |
5c35adbb | 5046 | |
575c37f6 DM |
5047 | if (re_sv) { |
5048 | re_sv = reg_temp_copy(NULL, re_sv); | |
288b8c02 | 5049 | } |
0f5d15d6 | 5050 | else { |
c737faaf | 5051 | U32 pm_flags = 0; |
0f5d15d6 | 5052 | |
9753d940 DM |
5053 | if (SvUTF8(ret) && IN_BYTES) { |
5054 | /* In use 'bytes': make a copy of the octet | |
5055 | * sequence, but without the flag on */ | |
b9ad30b4 NC |
5056 | STRLEN len; |
5057 | const char *const p = SvPV(ret, len); | |
5058 | ret = newSVpvn_flags(p, len, SVs_TEMP); | |
5059 | } | |
732caac7 DM |
5060 | if (rex->intflags & PREGf_USE_RE_EVAL) |
5061 | pm_flags |= PMf_USE_RE_EVAL; | |
5062 | ||
5063 | /* if we got here, it should be an engine which | |
5064 | * supports compiling code blocks and stuff */ | |
5065 | assert(rex->engine && rex->engine->op_comp); | |
ec841a27 | 5066 | assert(!(scan->flags & ~RXf_PMf_COMPILETIME)); |
575c37f6 | 5067 | re_sv = rex->engine->op_comp(aTHX_ &ret, 1, NULL, |
ec841a27 DM |
5068 | rex->engine, NULL, NULL, |
5069 | /* copy /msix etc to inner pattern */ | |
5070 | scan->flags, | |
5071 | pm_flags); | |
732caac7 | 5072 | |
9041c2e3 | 5073 | if (!(SvFLAGS(ret) |
faf82a0b | 5074 | & (SVs_TEMP | SVs_PADTMP | SVf_READONLY |
3ce3ed55 | 5075 | | SVs_GMG))) { |
a2794585 NC |
5076 | /* This isn't a first class regexp. Instead, it's |
5077 | caching a regexp onto an existing, Perl visible | |
5078 | scalar. */ | |
575c37f6 | 5079 | sv_magic(ret, MUTABLE_SV(re_sv), PERL_MAGIC_qr, 0, 0); |
3ce3ed55 | 5080 | } |
74088413 DM |
5081 | /* safe to do now that any $1 etc has been |
5082 | * interpolated into the new pattern string and | |
5083 | * compiled */ | |
92da3157 | 5084 | S_regcp_restore(aTHX_ rex, runops_cp, &maxopenparen); |
0f5d15d6 | 5085 | } |
e1ff3a88 | 5086 | SAVEFREESV(re_sv); |
8d919b0a | 5087 | re = ReANY(re_sv); |
4aabdb9b | 5088 | } |
07bc277f | 5089 | RXp_MATCH_COPIED_off(re); |
28d8d7f4 YO |
5090 | re->subbeg = rex->subbeg; |
5091 | re->sublen = rex->sublen; | |
6502e081 DM |
5092 | re->suboffset = rex->suboffset; |
5093 | re->subcoffset = rex->subcoffset; | |
f8fc2ecf | 5094 | rei = RXi_GET(re); |
6bda09f9 | 5095 | DEBUG_EXECUTE_r( |
f2ed9b32 | 5096 | debug_start_match(re_sv, utf8_target, locinput, PL_regeol, |
6bda09f9 YO |
5097 | "Matching embedded"); |
5098 | ); | |
f8fc2ecf | 5099 | startpoint = rei->program + 1; |
1a147d38 | 5100 | ST.close_paren = 0; /* only used for GOSUB */ |
aa283a38 | 5101 | |
1a147d38 | 5102 | eval_recurse_doit: /* Share code with GOSUB below this line */ |
aa283a38 | 5103 | /* run the pattern returned from (??{...}) */ |
92da3157 DM |
5104 | |
5105 | /* Save *all* the positions. */ | |
5106 | ST.cp = regcppush(rex, 0, maxopenparen); | |
40a82448 | 5107 | REGCP_SET(ST.lastcp); |
6bda09f9 | 5108 | |
0357f1fd ML |
5109 | re->lastparen = 0; |
5110 | re->lastcloseparen = 0; | |
5111 | ||
92da3157 | 5112 | maxopenparen = 0; |
4aabdb9b DM |
5113 | |
5114 | /* XXXX This is too dramatic a measure... */ | |
5115 | PL_reg_maxiter = 0; | |
5116 | ||
984e6dd1 DM |
5117 | ST.saved_utf8_pat = is_utf8_pat; |
5118 | is_utf8_pat = cBOOL(RX_UTF8(re_sv)); | |
faec1544 | 5119 | |
288b8c02 | 5120 | ST.prev_rex = rex_sv; |
faec1544 | 5121 | ST.prev_curlyx = cur_curlyx; |
ec43f78b DM |
5122 | rex_sv = re_sv; |
5123 | SET_reg_curpm(rex_sv); | |
288b8c02 | 5124 | rex = re; |
f8fc2ecf | 5125 | rexi = rei; |
faec1544 | 5126 | cur_curlyx = NULL; |
40a82448 | 5127 | ST.B = next; |
faec1544 DM |
5128 | ST.prev_eval = cur_eval; |
5129 | cur_eval = st; | |
faec1544 | 5130 | /* now continue from first node in postoned RE */ |
4d5016e5 | 5131 | PUSH_YES_STATE_GOTO(EVAL_AB, startpoint, locinput); |
118e2215 | 5132 | assert(0); /* NOTREACHED */ |
c277df42 | 5133 | } |
40a82448 | 5134 | |
faec1544 DM |
5135 | case EVAL_AB: /* cleanup after a successful (??{A})B */ |
5136 | /* note: this is called twice; first after popping B, then A */ | |
984e6dd1 | 5137 | is_utf8_pat = ST.saved_utf8_pat; |
ec43f78b DM |
5138 | rex_sv = ST.prev_rex; |
5139 | SET_reg_curpm(rex_sv); | |
8d919b0a | 5140 | rex = ReANY(rex_sv); |
f8fc2ecf | 5141 | rexi = RXi_GET(rex); |
faec1544 DM |
5142 | regcpblow(ST.cp); |
5143 | cur_eval = ST.prev_eval; | |
5144 | cur_curlyx = ST.prev_curlyx; | |
34a81e2b | 5145 | |
40a82448 DM |
5146 | /* XXXX This is too dramatic a measure... */ |
5147 | PL_reg_maxiter = 0; | |
e7707071 | 5148 | if ( nochange_depth ) |
4b196cd4 | 5149 | nochange_depth--; |
262b90c4 | 5150 | sayYES; |
40a82448 | 5151 | |
40a82448 | 5152 | |
faec1544 DM |
5153 | case EVAL_AB_fail: /* unsuccessfully ran A or B in (??{A})B */ |
5154 | /* note: this is called twice; first after popping B, then A */ | |
984e6dd1 | 5155 | is_utf8_pat = ST.saved_utf8_pat; |
ec43f78b DM |
5156 | rex_sv = ST.prev_rex; |
5157 | SET_reg_curpm(rex_sv); | |
8d919b0a | 5158 | rex = ReANY(rex_sv); |
f8fc2ecf | 5159 | rexi = RXi_GET(rex); |
0357f1fd | 5160 | |
40a82448 | 5161 | REGCP_UNWIND(ST.lastcp); |
92da3157 | 5162 | regcppop(rex, &maxopenparen); |
faec1544 DM |
5163 | cur_eval = ST.prev_eval; |
5164 | cur_curlyx = ST.prev_curlyx; | |
5165 | /* XXXX This is too dramatic a measure... */ | |
5166 | PL_reg_maxiter = 0; | |
e7707071 | 5167 | if ( nochange_depth ) |
4b196cd4 | 5168 | nochange_depth--; |
40a82448 | 5169 | sayNO_SILENT; |
40a82448 DM |
5170 | #undef ST |
5171 | ||
3c0563b9 | 5172 | case OPEN: /* ( */ |
c277df42 | 5173 | n = ARG(scan); /* which paren pair */ |
1ca2007e | 5174 | rex->offs[n].start_tmp = locinput - PL_bostr; |
92da3157 DM |
5175 | if (n > maxopenparen) |
5176 | maxopenparen = n; | |
495f47a5 | 5177 | DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log, |
92da3157 | 5178 | "rex=0x%"UVxf" offs=0x%"UVxf": \\%"UVuf": set %"IVdf" tmp; maxopenparen=%"UVuf"\n", |
495f47a5 DM |
5179 | PTR2UV(rex), |
5180 | PTR2UV(rex->offs), | |
5181 | (UV)n, | |
5182 | (IV)rex->offs[n].start_tmp, | |
92da3157 | 5183 | (UV)maxopenparen |
495f47a5 | 5184 | )); |
e2e6a0f1 | 5185 | lastopen = n; |
a0d0e21e | 5186 | break; |
495f47a5 DM |
5187 | |
5188 | /* XXX really need to log other places start/end are set too */ | |
5189 | #define CLOSE_CAPTURE \ | |
5190 | rex->offs[n].start = rex->offs[n].start_tmp; \ | |
5191 | rex->offs[n].end = locinput - PL_bostr; \ | |
5192 | DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log, \ | |
5193 | "rex=0x%"UVxf" offs=0x%"UVxf": \\%"UVuf": set %"IVdf"..%"IVdf"\n", \ | |
5194 | PTR2UV(rex), \ | |
5195 | PTR2UV(rex->offs), \ | |
5196 | (UV)n, \ | |
5197 | (IV)rex->offs[n].start, \ | |
5198 | (IV)rex->offs[n].end \ | |
5199 | )) | |
5200 | ||
3c0563b9 | 5201 | case CLOSE: /* ) */ |
c277df42 | 5202 | n = ARG(scan); /* which paren pair */ |
495f47a5 | 5203 | CLOSE_CAPTURE; |
b93070ed DM |
5204 | if (n > rex->lastparen) |
5205 | rex->lastparen = n; | |
5206 | rex->lastcloseparen = n; | |
3b6647e0 | 5207 | if (cur_eval && cur_eval->u.eval.close_paren == n) { |
6bda09f9 YO |
5208 | goto fake_end; |
5209 | } | |
a0d0e21e | 5210 | break; |
3c0563b9 DM |
5211 | |
5212 | case ACCEPT: /* (*ACCEPT) */ | |
e2e6a0f1 YO |
5213 | if (ARG(scan)){ |
5214 | regnode *cursor; | |
5215 | for (cursor=scan; | |
5216 | cursor && OP(cursor)!=END; | |
5217 | cursor=regnext(cursor)) | |
5218 | { | |
5219 | if ( OP(cursor)==CLOSE ){ | |
5220 | n = ARG(cursor); | |
5221 | if ( n <= lastopen ) { | |
495f47a5 | 5222 | CLOSE_CAPTURE; |
b93070ed DM |
5223 | if (n > rex->lastparen) |
5224 | rex->lastparen = n; | |
5225 | rex->lastcloseparen = n; | |
3b6647e0 RB |
5226 | if ( n == ARG(scan) || (cur_eval && |
5227 | cur_eval->u.eval.close_paren == n)) | |
e2e6a0f1 YO |
5228 | break; |
5229 | } | |
5230 | } | |
5231 | } | |
5232 | } | |
5233 | goto fake_end; | |
5234 | /*NOTREACHED*/ | |
3c0563b9 DM |
5235 | |
5236 | case GROUPP: /* (?(1)) */ | |
c277df42 | 5237 | n = ARG(scan); /* which paren pair */ |
b93070ed | 5238 | sw = cBOOL(rex->lastparen >= n && rex->offs[n].end != -1); |
c277df42 | 5239 | break; |
3c0563b9 DM |
5240 | |
5241 | case NGROUPP: /* (?(<name>)) */ | |
0a4db386 | 5242 | /* reg_check_named_buff_matched returns 0 for no match */ |
f2338a2e | 5243 | sw = cBOOL(0 < reg_check_named_buff_matched(rex,scan)); |
0a4db386 | 5244 | break; |
3c0563b9 DM |
5245 | |
5246 | case INSUBP: /* (?(R)) */ | |
0a4db386 | 5247 | n = ARG(scan); |
3b6647e0 | 5248 | sw = (cur_eval && (!n || cur_eval->u.eval.close_paren == n)); |
0a4db386 | 5249 | break; |
3c0563b9 DM |
5250 | |
5251 | case DEFINEP: /* (?(DEFINE)) */ | |
0a4db386 YO |
5252 | sw = 0; |
5253 | break; | |
3c0563b9 DM |
5254 | |
5255 | case IFTHEN: /* (?(cond)A|B) */ | |
2c2d71f5 | 5256 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
24d3c4a9 | 5257 | if (sw) |
c277df42 IZ |
5258 | next = NEXTOPER(NEXTOPER(scan)); |
5259 | else { | |
5260 | next = scan + ARG(scan); | |
5261 | if (OP(next) == IFTHEN) /* Fake one. */ | |
5262 | next = NEXTOPER(NEXTOPER(next)); | |
5263 | } | |
5264 | break; | |
3c0563b9 DM |
5265 | |
5266 | case LOGICAL: /* modifier for EVAL and IFMATCH */ | |
24d3c4a9 | 5267 | logical = scan->flags; |
c277df42 | 5268 | break; |
c476f425 | 5269 | |
2ab05381 | 5270 | /******************************************************************* |
2ab05381 | 5271 | |
c476f425 DM |
5272 | The CURLYX/WHILEM pair of ops handle the most generic case of the /A*B/ |
5273 | pattern, where A and B are subpatterns. (For simple A, CURLYM or | |
5274 | STAR/PLUS/CURLY/CURLYN are used instead.) | |
2ab05381 | 5275 | |
c476f425 | 5276 | A*B is compiled as <CURLYX><A><WHILEM><B> |
2ab05381 | 5277 | |
c476f425 DM |
5278 | On entry to the subpattern, CURLYX is called. This pushes a CURLYX |
5279 | state, which contains the current count, initialised to -1. It also sets | |
5280 | cur_curlyx to point to this state, with any previous value saved in the | |
5281 | state block. | |
2ab05381 | 5282 | |
c476f425 DM |
5283 | CURLYX then jumps straight to the WHILEM op, rather than executing A, |
5284 | since the pattern may possibly match zero times (i.e. it's a while {} loop | |
5285 | rather than a do {} while loop). | |
2ab05381 | 5286 | |
c476f425 DM |
5287 | Each entry to WHILEM represents a successful match of A. The count in the |
5288 | CURLYX block is incremented, another WHILEM state is pushed, and execution | |
5289 | passes to A or B depending on greediness and the current count. | |
2ab05381 | 5290 | |
c476f425 DM |
5291 | For example, if matching against the string a1a2a3b (where the aN are |
5292 | substrings that match /A/), then the match progresses as follows: (the | |
5293 | pushed states are interspersed with the bits of strings matched so far): | |
2ab05381 | 5294 | |
c476f425 DM |
5295 | <CURLYX cnt=-1> |
5296 | <CURLYX cnt=0><WHILEM> | |
5297 | <CURLYX cnt=1><WHILEM> a1 <WHILEM> | |
5298 | <CURLYX cnt=2><WHILEM> a1 <WHILEM> a2 <WHILEM> | |
5299 | <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> | |
5300 | <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> b | |
2ab05381 | 5301 | |
c476f425 DM |
5302 | (Contrast this with something like CURLYM, which maintains only a single |
5303 | backtrack state: | |
2ab05381 | 5304 | |
c476f425 DM |
5305 | <CURLYM cnt=0> a1 |
5306 | a1 <CURLYM cnt=1> a2 | |
5307 | a1 a2 <CURLYM cnt=2> a3 | |
5308 | a1 a2 a3 <CURLYM cnt=3> b | |
5309 | ) | |
2ab05381 | 5310 | |
c476f425 DM |
5311 | Each WHILEM state block marks a point to backtrack to upon partial failure |
5312 | of A or B, and also contains some minor state data related to that | |
5313 | iteration. The CURLYX block, pointed to by cur_curlyx, contains the | |
5314 | overall state, such as the count, and pointers to the A and B ops. | |
2ab05381 | 5315 | |
c476f425 DM |
5316 | This is complicated slightly by nested CURLYX/WHILEM's. Since cur_curlyx |
5317 | must always point to the *current* CURLYX block, the rules are: | |
2ab05381 | 5318 | |
c476f425 DM |
5319 | When executing CURLYX, save the old cur_curlyx in the CURLYX state block, |
5320 | and set cur_curlyx to point the new block. | |
2ab05381 | 5321 | |
c476f425 DM |
5322 | When popping the CURLYX block after a successful or unsuccessful match, |
5323 | restore the previous cur_curlyx. | |
2ab05381 | 5324 | |
c476f425 DM |
5325 | When WHILEM is about to execute B, save the current cur_curlyx, and set it |
5326 | to the outer one saved in the CURLYX block. | |
2ab05381 | 5327 | |
c476f425 DM |
5328 | When popping the WHILEM block after a successful or unsuccessful B match, |
5329 | restore the previous cur_curlyx. | |
2ab05381 | 5330 | |
c476f425 DM |
5331 | Here's an example for the pattern (AI* BI)*BO |
5332 | I and O refer to inner and outer, C and W refer to CURLYX and WHILEM: | |
2ab05381 | 5333 | |
c476f425 DM |
5334 | cur_ |
5335 | curlyx backtrack stack | |
5336 | ------ --------------- | |
5337 | NULL | |
5338 | CO <CO prev=NULL> <WO> | |
5339 | CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai | |
5340 | CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi | |
5341 | NULL <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi <WO prev=CO> bo | |
2ab05381 | 5342 | |
c476f425 DM |
5343 | At this point the pattern succeeds, and we work back down the stack to |
5344 | clean up, restoring as we go: | |
95b24440 | 5345 | |
c476f425 DM |
5346 | CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi |
5347 | CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai | |
5348 | CO <CO prev=NULL> <WO> | |
5349 | NULL | |
a0374537 | 5350 | |
c476f425 DM |
5351 | *******************************************************************/ |
5352 | ||
5353 | #define ST st->u.curlyx | |
5354 | ||
5355 | case CURLYX: /* start of /A*B/ (for complex A) */ | |
5356 | { | |
5357 | /* No need to save/restore up to this paren */ | |
5358 | I32 parenfloor = scan->flags; | |
5359 | ||
5360 | assert(next); /* keep Coverity happy */ | |
5361 | if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */ | |
5362 | next += ARG(next); | |
5363 | ||
5364 | /* XXXX Probably it is better to teach regpush to support | |
92da3157 | 5365 | parenfloor > maxopenparen ... */ |
b93070ed DM |
5366 | if (parenfloor > (I32)rex->lastparen) |
5367 | parenfloor = rex->lastparen; /* Pessimization... */ | |
c476f425 DM |
5368 | |
5369 | ST.prev_curlyx= cur_curlyx; | |
5370 | cur_curlyx = st; | |
5371 | ST.cp = PL_savestack_ix; | |
5372 | ||
5373 | /* these fields contain the state of the current curly. | |
5374 | * they are accessed by subsequent WHILEMs */ | |
5375 | ST.parenfloor = parenfloor; | |
d02d6d97 | 5376 | ST.me = scan; |
c476f425 | 5377 | ST.B = next; |
24d3c4a9 DM |
5378 | ST.minmod = minmod; |
5379 | minmod = 0; | |
c476f425 DM |
5380 | ST.count = -1; /* this will be updated by WHILEM */ |
5381 | ST.lastloc = NULL; /* this will be updated by WHILEM */ | |
5382 | ||
4d5016e5 | 5383 | PUSH_YES_STATE_GOTO(CURLYX_end, PREVOPER(next), locinput); |
118e2215 | 5384 | assert(0); /* NOTREACHED */ |
c476f425 | 5385 | } |
a0d0e21e | 5386 | |
c476f425 | 5387 | case CURLYX_end: /* just finished matching all of A*B */ |
c476f425 DM |
5388 | cur_curlyx = ST.prev_curlyx; |
5389 | sayYES; | |
118e2215 | 5390 | assert(0); /* NOTREACHED */ |
a0d0e21e | 5391 | |
c476f425 DM |
5392 | case CURLYX_end_fail: /* just failed to match all of A*B */ |
5393 | regcpblow(ST.cp); | |
5394 | cur_curlyx = ST.prev_curlyx; | |
5395 | sayNO; | |
118e2215 | 5396 | assert(0); /* NOTREACHED */ |
4633a7c4 | 5397 | |
a0d0e21e | 5398 | |
c476f425 DM |
5399 | #undef ST |
5400 | #define ST st->u.whilem | |
5401 | ||
5402 | case WHILEM: /* just matched an A in /A*B/ (for complex A) */ | |
5403 | { | |
5404 | /* see the discussion above about CURLYX/WHILEM */ | |
c476f425 | 5405 | I32 n; |
d02d6d97 DM |
5406 | int min = ARG1(cur_curlyx->u.curlyx.me); |
5407 | int max = ARG2(cur_curlyx->u.curlyx.me); | |
5408 | regnode *A = NEXTOPER(cur_curlyx->u.curlyx.me) + EXTRA_STEP_2ARGS; | |
5409 | ||
c476f425 DM |
5410 | assert(cur_curlyx); /* keep Coverity happy */ |
5411 | n = ++cur_curlyx->u.curlyx.count; /* how many A's matched */ | |
5412 | ST.save_lastloc = cur_curlyx->u.curlyx.lastloc; | |
5413 | ST.cache_offset = 0; | |
5414 | ST.cache_mask = 0; | |
5415 | ||
c476f425 DM |
5416 | |
5417 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, | |
d02d6d97 DM |
5418 | "%*s whilem: matched %ld out of %d..%d\n", |
5419 | REPORT_CODE_OFF+depth*2, "", (long)n, min, max) | |
c476f425 | 5420 | ); |
a0d0e21e | 5421 | |
c476f425 | 5422 | /* First just match a string of min A's. */ |
a0d0e21e | 5423 | |
d02d6d97 | 5424 | if (n < min) { |
92da3157 DM |
5425 | ST.cp = regcppush(rex, cur_curlyx->u.curlyx.parenfloor, |
5426 | maxopenparen); | |
c476f425 | 5427 | cur_curlyx->u.curlyx.lastloc = locinput; |
92e82afa YO |
5428 | REGCP_SET(ST.lastcp); |
5429 | ||
4d5016e5 | 5430 | PUSH_STATE_GOTO(WHILEM_A_pre, A, locinput); |
118e2215 | 5431 | assert(0); /* NOTREACHED */ |
c476f425 DM |
5432 | } |
5433 | ||
5434 | /* If degenerate A matches "", assume A done. */ | |
5435 | ||
5436 | if (locinput == cur_curlyx->u.curlyx.lastloc) { | |
5437 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, | |
5438 | "%*s whilem: empty match detected, trying continuation...\n", | |
5439 | REPORT_CODE_OFF+depth*2, "") | |
5440 | ); | |
5441 | goto do_whilem_B_max; | |
5442 | } | |
5443 | ||
5444 | /* super-linear cache processing */ | |
5445 | ||
5446 | if (scan->flags) { | |
a0d0e21e | 5447 | |
2c2d71f5 | 5448 | if (!PL_reg_maxiter) { |
c476f425 DM |
5449 | /* start the countdown: Postpone detection until we |
5450 | * know the match is not *that* much linear. */ | |
2c2d71f5 | 5451 | PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4); |
66bf836d DM |
5452 | /* possible overflow for long strings and many CURLYX's */ |
5453 | if (PL_reg_maxiter < 0) | |
5454 | PL_reg_maxiter = I32_MAX; | |
2c2d71f5 JH |
5455 | PL_reg_leftiter = PL_reg_maxiter; |
5456 | } | |
c476f425 | 5457 | |
2c2d71f5 | 5458 | if (PL_reg_leftiter-- == 0) { |
c476f425 | 5459 | /* initialise cache */ |
3298f257 | 5460 | const I32 size = (PL_reg_maxiter + 7)/8; |
2c2d71f5 | 5461 | if (PL_reg_poscache) { |
eb160463 | 5462 | if ((I32)PL_reg_poscache_size < size) { |
2c2d71f5 JH |
5463 | Renew(PL_reg_poscache, size, char); |
5464 | PL_reg_poscache_size = size; | |
5465 | } | |
5466 | Zero(PL_reg_poscache, size, char); | |
5467 | } | |
5468 | else { | |
5469 | PL_reg_poscache_size = size; | |
a02a5408 | 5470 | Newxz(PL_reg_poscache, size, char); |
2c2d71f5 | 5471 | } |
c476f425 DM |
5472 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
5473 | "%swhilem: Detected a super-linear match, switching on caching%s...\n", | |
5474 | PL_colors[4], PL_colors[5]) | |
5475 | ); | |
2c2d71f5 | 5476 | } |
c476f425 | 5477 | |
2c2d71f5 | 5478 | if (PL_reg_leftiter < 0) { |
c476f425 DM |
5479 | /* have we already failed at this position? */ |
5480 | I32 offset, mask; | |
5481 | offset = (scan->flags & 0xf) - 1 | |
5482 | + (locinput - PL_bostr) * (scan->flags>>4); | |
5483 | mask = 1 << (offset % 8); | |
5484 | offset /= 8; | |
5485 | if (PL_reg_poscache[offset] & mask) { | |
5486 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, | |
5487 | "%*s whilem: (cache) already tried at this position...\n", | |
5488 | REPORT_CODE_OFF+depth*2, "") | |
2c2d71f5 | 5489 | ); |
3298f257 | 5490 | sayNO; /* cache records failure */ |
2c2d71f5 | 5491 | } |
c476f425 DM |
5492 | ST.cache_offset = offset; |
5493 | ST.cache_mask = mask; | |
2c2d71f5 | 5494 | } |
c476f425 | 5495 | } |
2c2d71f5 | 5496 | |
c476f425 | 5497 | /* Prefer B over A for minimal matching. */ |
a687059c | 5498 | |
c476f425 DM |
5499 | if (cur_curlyx->u.curlyx.minmod) { |
5500 | ST.save_curlyx = cur_curlyx; | |
5501 | cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx; | |
92da3157 DM |
5502 | ST.cp = regcppush(rex, ST.save_curlyx->u.curlyx.parenfloor, |
5503 | maxopenparen); | |
c476f425 | 5504 | REGCP_SET(ST.lastcp); |
4d5016e5 DM |
5505 | PUSH_YES_STATE_GOTO(WHILEM_B_min, ST.save_curlyx->u.curlyx.B, |
5506 | locinput); | |
118e2215 | 5507 | assert(0); /* NOTREACHED */ |
c476f425 | 5508 | } |
a0d0e21e | 5509 | |
c476f425 DM |
5510 | /* Prefer A over B for maximal matching. */ |
5511 | ||
d02d6d97 | 5512 | if (n < max) { /* More greed allowed? */ |
92da3157 DM |
5513 | ST.cp = regcppush(rex, cur_curlyx->u.curlyx.parenfloor, |
5514 | maxopenparen); | |
c476f425 DM |
5515 | cur_curlyx->u.curlyx.lastloc = locinput; |
5516 | REGCP_SET(ST.lastcp); | |
4d5016e5 | 5517 | PUSH_STATE_GOTO(WHILEM_A_max, A, locinput); |
118e2215 | 5518 | assert(0); /* NOTREACHED */ |
c476f425 DM |
5519 | } |
5520 | goto do_whilem_B_max; | |
5521 | } | |
118e2215 | 5522 | assert(0); /* NOTREACHED */ |
c476f425 DM |
5523 | |
5524 | case WHILEM_B_min: /* just matched B in a minimal match */ | |
5525 | case WHILEM_B_max: /* just matched B in a maximal match */ | |
5526 | cur_curlyx = ST.save_curlyx; | |
5527 | sayYES; | |
118e2215 | 5528 | assert(0); /* NOTREACHED */ |
c476f425 DM |
5529 | |
5530 | case WHILEM_B_max_fail: /* just failed to match B in a maximal match */ | |
5531 | cur_curlyx = ST.save_curlyx; | |
5532 | cur_curlyx->u.curlyx.lastloc = ST.save_lastloc; | |
5533 | cur_curlyx->u.curlyx.count--; | |
5534 | CACHEsayNO; | |
118e2215 | 5535 | assert(0); /* NOTREACHED */ |
c476f425 DM |
5536 | |
5537 | case WHILEM_A_min_fail: /* just failed to match A in a minimal match */ | |
c476f425 DM |
5538 | /* FALL THROUGH */ |
5539 | case WHILEM_A_pre_fail: /* just failed to match even minimal A */ | |
92e82afa | 5540 | REGCP_UNWIND(ST.lastcp); |
92da3157 | 5541 | regcppop(rex, &maxopenparen); |
c476f425 DM |
5542 | cur_curlyx->u.curlyx.lastloc = ST.save_lastloc; |
5543 | cur_curlyx->u.curlyx.count--; | |
5544 | CACHEsayNO; | |
118e2215 | 5545 | assert(0); /* NOTREACHED */ |
c476f425 DM |
5546 | |
5547 | case WHILEM_A_max_fail: /* just failed to match A in a maximal match */ | |
5548 | REGCP_UNWIND(ST.lastcp); | |
92da3157 | 5549 | regcppop(rex, &maxopenparen); /* Restore some previous $<digit>s? */ |
c476f425 DM |
5550 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
5551 | "%*s whilem: failed, trying continuation...\n", | |
5552 | REPORT_CODE_OFF+depth*2, "") | |
5553 | ); | |
5554 | do_whilem_B_max: | |
5555 | if (cur_curlyx->u.curlyx.count >= REG_INFTY | |
5556 | && ckWARN(WARN_REGEXP) | |
39819bd9 | 5557 | && !reginfo->warned) |
c476f425 | 5558 | { |
39819bd9 | 5559 | reginfo->warned = TRUE; |
dcbac5bb FC |
5560 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), |
5561 | "Complex regular subexpression recursion limit (%d) " | |
5562 | "exceeded", | |
c476f425 DM |
5563 | REG_INFTY - 1); |
5564 | } | |
5565 | ||
5566 | /* now try B */ | |
5567 | ST.save_curlyx = cur_curlyx; | |
5568 | cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx; | |
4d5016e5 DM |
5569 | PUSH_YES_STATE_GOTO(WHILEM_B_max, ST.save_curlyx->u.curlyx.B, |
5570 | locinput); | |
118e2215 | 5571 | assert(0); /* NOTREACHED */ |
c476f425 DM |
5572 | |
5573 | case WHILEM_B_min_fail: /* just failed to match B in a minimal match */ | |
5574 | cur_curlyx = ST.save_curlyx; | |
5575 | REGCP_UNWIND(ST.lastcp); | |
92da3157 | 5576 | regcppop(rex, &maxopenparen); |
c476f425 | 5577 | |
d02d6d97 | 5578 | if (cur_curlyx->u.curlyx.count >= /*max*/ARG2(cur_curlyx->u.curlyx.me)) { |
c476f425 DM |
5579 | /* Maximum greed exceeded */ |
5580 | if (cur_curlyx->u.curlyx.count >= REG_INFTY | |
5581 | && ckWARN(WARN_REGEXP) | |
39819bd9 | 5582 | && !reginfo->warned) |
c476f425 | 5583 | { |
39819bd9 | 5584 | reginfo->warned = TRUE; |
c476f425 | 5585 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), |
dcbac5bb FC |
5586 | "Complex regular subexpression recursion " |
5587 | "limit (%d) exceeded", | |
c476f425 | 5588 | REG_INFTY - 1); |
a0d0e21e | 5589 | } |
c476f425 | 5590 | cur_curlyx->u.curlyx.count--; |
3ab3c9b4 | 5591 | CACHEsayNO; |
a0d0e21e | 5592 | } |
c476f425 DM |
5593 | |
5594 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, | |
5595 | "%*s trying longer...\n", REPORT_CODE_OFF+depth*2, "") | |
5596 | ); | |
5597 | /* Try grabbing another A and see if it helps. */ | |
c476f425 | 5598 | cur_curlyx->u.curlyx.lastloc = locinput; |
92da3157 DM |
5599 | ST.cp = regcppush(rex, cur_curlyx->u.curlyx.parenfloor, |
5600 | maxopenparen); | |
c476f425 | 5601 | REGCP_SET(ST.lastcp); |
d02d6d97 | 5602 | PUSH_STATE_GOTO(WHILEM_A_min, |
4d5016e5 DM |
5603 | /*A*/ NEXTOPER(ST.save_curlyx->u.curlyx.me) + EXTRA_STEP_2ARGS, |
5604 | locinput); | |
118e2215 | 5605 | assert(0); /* NOTREACHED */ |
40a82448 DM |
5606 | |
5607 | #undef ST | |
5608 | #define ST st->u.branch | |
5609 | ||
5610 | case BRANCHJ: /* /(...|A|...)/ with long next pointer */ | |
c277df42 IZ |
5611 | next = scan + ARG(scan); |
5612 | if (next == scan) | |
5613 | next = NULL; | |
40a82448 DM |
5614 | scan = NEXTOPER(scan); |
5615 | /* FALL THROUGH */ | |
c277df42 | 5616 | |
40a82448 DM |
5617 | case BRANCH: /* /(...|A|...)/ */ |
5618 | scan = NEXTOPER(scan); /* scan now points to inner node */ | |
b93070ed | 5619 | ST.lastparen = rex->lastparen; |
f6033a9d | 5620 | ST.lastcloseparen = rex->lastcloseparen; |
40a82448 DM |
5621 | ST.next_branch = next; |
5622 | REGCP_SET(ST.cp); | |
02db2b7b | 5623 | |
40a82448 | 5624 | /* Now go into the branch */ |
5d458dd8 | 5625 | if (has_cutgroup) { |
4d5016e5 | 5626 | PUSH_YES_STATE_GOTO(BRANCH_next, scan, locinput); |
5d458dd8 | 5627 | } else { |
4d5016e5 | 5628 | PUSH_STATE_GOTO(BRANCH_next, scan, locinput); |
5d458dd8 | 5629 | } |
118e2215 | 5630 | assert(0); /* NOTREACHED */ |
3c0563b9 DM |
5631 | |
5632 | case CUTGROUP: /* /(*THEN)/ */ | |
5d458dd8 | 5633 | sv_yes_mark = st->u.mark.mark_name = scan->flags ? NULL : |
ad64d0ec | 5634 | MUTABLE_SV(rexi->data->data[ ARG( scan ) ]); |
4d5016e5 | 5635 | PUSH_STATE_GOTO(CUTGROUP_next, next, locinput); |
118e2215 | 5636 | assert(0); /* NOTREACHED */ |
3c0563b9 | 5637 | |
5d458dd8 YO |
5638 | case CUTGROUP_next_fail: |
5639 | do_cutgroup = 1; | |
5640 | no_final = 1; | |
5641 | if (st->u.mark.mark_name) | |
5642 | sv_commit = st->u.mark.mark_name; | |
5643 | sayNO; | |
118e2215 | 5644 | assert(0); /* NOTREACHED */ |
3c0563b9 | 5645 | |
5d458dd8 YO |
5646 | case BRANCH_next: |
5647 | sayYES; | |
118e2215 | 5648 | assert(0); /* NOTREACHED */ |
3c0563b9 | 5649 | |
40a82448 | 5650 | case BRANCH_next_fail: /* that branch failed; try the next, if any */ |
5d458dd8 YO |
5651 | if (do_cutgroup) { |
5652 | do_cutgroup = 0; | |
5653 | no_final = 0; | |
5654 | } | |
40a82448 | 5655 | REGCP_UNWIND(ST.cp); |
a8d1f4b4 | 5656 | UNWIND_PAREN(ST.lastparen, ST.lastcloseparen); |
40a82448 DM |
5657 | scan = ST.next_branch; |
5658 | /* no more branches? */ | |
5d458dd8 YO |
5659 | if (!scan || (OP(scan) != BRANCH && OP(scan) != BRANCHJ)) { |
5660 | DEBUG_EXECUTE_r({ | |
5661 | PerlIO_printf( Perl_debug_log, | |
5662 | "%*s %sBRANCH failed...%s\n", | |
5663 | REPORT_CODE_OFF+depth*2, "", | |
5664 | PL_colors[4], | |
5665 | PL_colors[5] ); | |
5666 | }); | |
5667 | sayNO_SILENT; | |
5668 | } | |
40a82448 | 5669 | continue; /* execute next BRANCH[J] op */ |
118e2215 | 5670 | assert(0); /* NOTREACHED */ |
40a82448 | 5671 | |
3c0563b9 | 5672 | case MINMOD: /* next op will be non-greedy, e.g. A*? */ |
24d3c4a9 | 5673 | minmod = 1; |
a0d0e21e | 5674 | break; |
40a82448 DM |
5675 | |
5676 | #undef ST | |
5677 | #define ST st->u.curlym | |
5678 | ||
5679 | case CURLYM: /* /A{m,n}B/ where A is fixed-length */ | |
5680 | ||
5681 | /* This is an optimisation of CURLYX that enables us to push | |
84d2fa14 | 5682 | * only a single backtracking state, no matter how many matches |
40a82448 DM |
5683 | * there are in {m,n}. It relies on the pattern being constant |
5684 | * length, with no parens to influence future backrefs | |
5685 | */ | |
5686 | ||
5687 | ST.me = scan; | |
dc45a647 | 5688 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
40a82448 | 5689 | |
f6033a9d DM |
5690 | ST.lastparen = rex->lastparen; |
5691 | ST.lastcloseparen = rex->lastcloseparen; | |
5692 | ||
40a82448 DM |
5693 | /* if paren positive, emulate an OPEN/CLOSE around A */ |
5694 | if (ST.me->flags) { | |
3b6647e0 | 5695 | U32 paren = ST.me->flags; |
92da3157 DM |
5696 | if (paren > maxopenparen) |
5697 | maxopenparen = paren; | |
c277df42 | 5698 | scan += NEXT_OFF(scan); /* Skip former OPEN. */ |
6407bf3b | 5699 | } |
40a82448 DM |
5700 | ST.A = scan; |
5701 | ST.B = next; | |
5702 | ST.alen = 0; | |
5703 | ST.count = 0; | |
24d3c4a9 DM |
5704 | ST.minmod = minmod; |
5705 | minmod = 0; | |
40a82448 DM |
5706 | ST.c1 = CHRTEST_UNINIT; |
5707 | REGCP_SET(ST.cp); | |
6407bf3b | 5708 | |
40a82448 DM |
5709 | if (!(ST.minmod ? ARG1(ST.me) : ARG2(ST.me))) /* min/max */ |
5710 | goto curlym_do_B; | |
5711 | ||
5712 | curlym_do_A: /* execute the A in /A{m,n}B/ */ | |
4d5016e5 | 5713 | PUSH_YES_STATE_GOTO(CURLYM_A, ST.A, locinput); /* match A */ |
118e2215 | 5714 | assert(0); /* NOTREACHED */ |
5f80c4cf | 5715 | |
40a82448 | 5716 | case CURLYM_A: /* we've just matched an A */ |
40a82448 DM |
5717 | ST.count++; |
5718 | /* after first match, determine A's length: u.curlym.alen */ | |
5719 | if (ST.count == 1) { | |
5720 | if (PL_reg_match_utf8) { | |
c07e9d7b DM |
5721 | char *s = st->locinput; |
5722 | while (s < locinput) { | |
40a82448 DM |
5723 | ST.alen++; |
5724 | s += UTF8SKIP(s); | |
5725 | } | |
5726 | } | |
5727 | else { | |
c07e9d7b | 5728 | ST.alen = locinput - st->locinput; |
40a82448 DM |
5729 | } |
5730 | if (ST.alen == 0) | |
5731 | ST.count = ST.minmod ? ARG1(ST.me) : ARG2(ST.me); | |
5732 | } | |
0cadcf80 DM |
5733 | DEBUG_EXECUTE_r( |
5734 | PerlIO_printf(Perl_debug_log, | |
40a82448 | 5735 | "%*s CURLYM now matched %"IVdf" times, len=%"IVdf"...\n", |
5bc10b2c | 5736 | (int)(REPORT_CODE_OFF+(depth*2)), "", |
40a82448 | 5737 | (IV) ST.count, (IV)ST.alen) |
0cadcf80 DM |
5738 | ); |
5739 | ||
0a4db386 | 5740 | if (cur_eval && cur_eval->u.eval.close_paren && |
24b23f37 | 5741 | cur_eval->u.eval.close_paren == (U32)ST.me->flags) |
0a4db386 YO |
5742 | goto fake_end; |
5743 | ||
c966426a DM |
5744 | { |
5745 | I32 max = (ST.minmod ? ARG1(ST.me) : ARG2(ST.me)); | |
5746 | if ( max == REG_INFTY || ST.count < max ) | |
5747 | goto curlym_do_A; /* try to match another A */ | |
5748 | } | |
40a82448 | 5749 | goto curlym_do_B; /* try to match B */ |
5f80c4cf | 5750 | |
40a82448 DM |
5751 | case CURLYM_A_fail: /* just failed to match an A */ |
5752 | REGCP_UNWIND(ST.cp); | |
0a4db386 YO |
5753 | |
5754 | if (ST.minmod || ST.count < ARG1(ST.me) /* min*/ | |
5755 | || (cur_eval && cur_eval->u.eval.close_paren && | |
24b23f37 | 5756 | cur_eval->u.eval.close_paren == (U32)ST.me->flags)) |
40a82448 | 5757 | sayNO; |
0cadcf80 | 5758 | |
40a82448 | 5759 | curlym_do_B: /* execute the B in /A{m,n}B/ */ |
40a82448 DM |
5760 | if (ST.c1 == CHRTEST_UNINIT) { |
5761 | /* calculate c1 and c2 for possible match of 1st char | |
5762 | * following curly */ | |
5763 | ST.c1 = ST.c2 = CHRTEST_VOID; | |
5764 | if (HAS_TEXT(ST.B) || JUMPABLE(ST.B)) { | |
5765 | regnode *text_node = ST.B; | |
5766 | if (! HAS_TEXT(text_node)) | |
5767 | FIND_NEXT_IMPT(text_node); | |
ee9b8eae YO |
5768 | /* this used to be |
5769 | ||
5770 | (HAS_TEXT(text_node) && PL_regkind[OP(text_node)] == EXACT) | |
5771 | ||
5772 | But the former is redundant in light of the latter. | |
5773 | ||
5774 | if this changes back then the macro for | |
5775 | IS_TEXT and friends need to change. | |
5776 | */ | |
c74f6de9 | 5777 | if (PL_regkind[OP(text_node)] == EXACT) { |
79a2a0e8 | 5778 | if (! S_setup_EXACTISH_ST_c1_c2(aTHX_ |
984e6dd1 DM |
5779 | text_node, &ST.c1, ST.c1_utf8, &ST.c2, ST.c2_utf8, |
5780 | is_utf8_pat)) | |
c74f6de9 KW |
5781 | { |
5782 | sayNO; | |
5783 | } | |
c277df42 | 5784 | } |
c277df42 | 5785 | } |
40a82448 DM |
5786 | } |
5787 | ||
5788 | DEBUG_EXECUTE_r( | |
5789 | PerlIO_printf(Perl_debug_log, | |
5790 | "%*s CURLYM trying tail with matches=%"IVdf"...\n", | |
5bc10b2c | 5791 | (int)(REPORT_CODE_OFF+(depth*2)), |
40a82448 DM |
5792 | "", (IV)ST.count) |
5793 | ); | |
c74f6de9 | 5794 | if (! NEXTCHR_IS_EOS && ST.c1 != CHRTEST_VOID) { |
79a2a0e8 KW |
5795 | if (! UTF8_IS_INVARIANT(nextchr) && utf8_target) { |
5796 | if (memNE(locinput, ST.c1_utf8, UTF8SKIP(locinput)) | |
5797 | && memNE(locinput, ST.c2_utf8, UTF8SKIP(locinput))) | |
5798 | { | |
5799 | /* simulate B failing */ | |
5800 | DEBUG_OPTIMISE_r( | |
5801 | PerlIO_printf(Perl_debug_log, | |
5802 | "%*s CURLYM Fast bail next target=U+%"UVXf" c1=U+%"UVXf" c2=U+%"UVXf"\n", | |
5803 | (int)(REPORT_CODE_OFF+(depth*2)),"", | |
5804 | valid_utf8_to_uvchr((U8 *) locinput, NULL), | |
5805 | valid_utf8_to_uvchr(ST.c1_utf8, NULL), | |
5806 | valid_utf8_to_uvchr(ST.c2_utf8, NULL)) | |
5807 | ); | |
5808 | state_num = CURLYM_B_fail; | |
5809 | goto reenter_switch; | |
5810 | } | |
5811 | } | |
5812 | else if (nextchr != ST.c1 && nextchr != ST.c2) { | |
5400f398 KW |
5813 | /* simulate B failing */ |
5814 | DEBUG_OPTIMISE_r( | |
5815 | PerlIO_printf(Perl_debug_log, | |
79a2a0e8 | 5816 | "%*s CURLYM Fast bail next target=U+%X c1=U+%X c2=U+%X\n", |
5400f398 | 5817 | (int)(REPORT_CODE_OFF+(depth*2)),"", |
79a2a0e8 KW |
5818 | (int) nextchr, ST.c1, ST.c2) |
5819 | ); | |
5400f398 KW |
5820 | state_num = CURLYM_B_fail; |
5821 | goto reenter_switch; | |
5822 | } | |
c74f6de9 | 5823 | } |
40a82448 DM |
5824 | |
5825 | if (ST.me->flags) { | |
f6033a9d | 5826 | /* emulate CLOSE: mark current A as captured */ |
40a82448 DM |
5827 | I32 paren = ST.me->flags; |
5828 | if (ST.count) { | |
b93070ed | 5829 | rex->offs[paren].start |
c07e9d7b DM |
5830 | = HOPc(locinput, -ST.alen) - PL_bostr; |
5831 | rex->offs[paren].end = locinput - PL_bostr; | |
f6033a9d DM |
5832 | if ((U32)paren > rex->lastparen) |
5833 | rex->lastparen = paren; | |
5834 | rex->lastcloseparen = paren; | |
c277df42 | 5835 | } |
40a82448 | 5836 | else |
b93070ed | 5837 | rex->offs[paren].end = -1; |
0a4db386 | 5838 | if (cur_eval && cur_eval->u.eval.close_paren && |
24b23f37 | 5839 | cur_eval->u.eval.close_paren == (U32)ST.me->flags) |
0a4db386 YO |
5840 | { |
5841 | if (ST.count) | |
5842 | goto fake_end; | |
5843 | else | |
5844 | sayNO; | |
5845 | } | |
c277df42 | 5846 | } |
0a4db386 | 5847 | |
4d5016e5 | 5848 | PUSH_STATE_GOTO(CURLYM_B, ST.B, locinput); /* match B */ |
118e2215 | 5849 | assert(0); /* NOTREACHED */ |
40a82448 DM |
5850 | |
5851 | case CURLYM_B_fail: /* just failed to match a B */ | |
5852 | REGCP_UNWIND(ST.cp); | |
a8d1f4b4 | 5853 | UNWIND_PAREN(ST.lastparen, ST.lastcloseparen); |
40a82448 | 5854 | if (ST.minmod) { |
84d2fa14 HS |
5855 | I32 max = ARG2(ST.me); |
5856 | if (max != REG_INFTY && ST.count == max) | |
40a82448 DM |
5857 | sayNO; |
5858 | goto curlym_do_A; /* try to match a further A */ | |
5859 | } | |
5860 | /* backtrack one A */ | |
5861 | if (ST.count == ARG1(ST.me) /* min */) | |
5862 | sayNO; | |
5863 | ST.count--; | |
7016d6eb | 5864 | SET_locinput(HOPc(locinput, -ST.alen)); |
40a82448 DM |
5865 | goto curlym_do_B; /* try to match B */ |
5866 | ||
c255a977 DM |
5867 | #undef ST |
5868 | #define ST st->u.curly | |
40a82448 | 5869 | |
c255a977 DM |
5870 | #define CURLY_SETPAREN(paren, success) \ |
5871 | if (paren) { \ | |
5872 | if (success) { \ | |
b93070ed DM |
5873 | rex->offs[paren].start = HOPc(locinput, -1) - PL_bostr; \ |
5874 | rex->offs[paren].end = locinput - PL_bostr; \ | |
f6033a9d DM |
5875 | if (paren > rex->lastparen) \ |
5876 | rex->lastparen = paren; \ | |
b93070ed | 5877 | rex->lastcloseparen = paren; \ |
c255a977 | 5878 | } \ |
f6033a9d | 5879 | else { \ |
b93070ed | 5880 | rex->offs[paren].end = -1; \ |
f6033a9d DM |
5881 | rex->lastparen = ST.lastparen; \ |
5882 | rex->lastcloseparen = ST.lastcloseparen; \ | |
5883 | } \ | |
c255a977 DM |
5884 | } |
5885 | ||
b40a2c17 | 5886 | case STAR: /* /A*B/ where A is width 1 char */ |
c255a977 DM |
5887 | ST.paren = 0; |
5888 | ST.min = 0; | |
5889 | ST.max = REG_INFTY; | |
a0d0e21e LW |
5890 | scan = NEXTOPER(scan); |
5891 | goto repeat; | |
3c0563b9 | 5892 | |
b40a2c17 | 5893 | case PLUS: /* /A+B/ where A is width 1 char */ |
c255a977 DM |
5894 | ST.paren = 0; |
5895 | ST.min = 1; | |
5896 | ST.max = REG_INFTY; | |
c277df42 | 5897 | scan = NEXTOPER(scan); |
c255a977 | 5898 | goto repeat; |
3c0563b9 | 5899 | |
b40a2c17 | 5900 | case CURLYN: /* /(A){m,n}B/ where A is width 1 char */ |
5400f398 KW |
5901 | ST.paren = scan->flags; /* Which paren to set */ |
5902 | ST.lastparen = rex->lastparen; | |
f6033a9d | 5903 | ST.lastcloseparen = rex->lastcloseparen; |
92da3157 DM |
5904 | if (ST.paren > maxopenparen) |
5905 | maxopenparen = ST.paren; | |
c255a977 DM |
5906 | ST.min = ARG1(scan); /* min to match */ |
5907 | ST.max = ARG2(scan); /* max to match */ | |
0a4db386 | 5908 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 5909 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
0a4db386 YO |
5910 | ST.min=1; |
5911 | ST.max=1; | |
5912 | } | |
c255a977 DM |
5913 | scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE); |
5914 | goto repeat; | |
3c0563b9 | 5915 | |
b40a2c17 | 5916 | case CURLY: /* /A{m,n}B/ where A is width 1 char */ |
c255a977 DM |
5917 | ST.paren = 0; |
5918 | ST.min = ARG1(scan); /* min to match */ | |
5919 | ST.max = ARG2(scan); /* max to match */ | |
5920 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; | |
c277df42 | 5921 | repeat: |
a0d0e21e LW |
5922 | /* |
5923 | * Lookahead to avoid useless match attempts | |
5924 | * when we know what character comes next. | |
c255a977 | 5925 | * |
5f80c4cf JP |
5926 | * Used to only do .*x and .*?x, but now it allows |
5927 | * for )'s, ('s and (?{ ... })'s to be in the way | |
5928 | * of the quantifier and the EXACT-like node. -- japhy | |
5929 | */ | |
5930 | ||
eb5c1be8 | 5931 | assert(ST.min <= ST.max); |
3337dfe3 KW |
5932 | if (! HAS_TEXT(next) && ! JUMPABLE(next)) { |
5933 | ST.c1 = ST.c2 = CHRTEST_VOID; | |
5934 | } | |
5935 | else { | |
5f80c4cf JP |
5936 | regnode *text_node = next; |
5937 | ||
3dab1dad YO |
5938 | if (! HAS_TEXT(text_node)) |
5939 | FIND_NEXT_IMPT(text_node); | |
5f80c4cf | 5940 | |
9e137952 | 5941 | if (! HAS_TEXT(text_node)) |
c255a977 | 5942 | ST.c1 = ST.c2 = CHRTEST_VOID; |
5f80c4cf | 5943 | else { |
ee9b8eae | 5944 | if ( PL_regkind[OP(text_node)] != EXACT ) { |
c255a977 | 5945 | ST.c1 = ST.c2 = CHRTEST_VOID; |
cca55fe3 | 5946 | } |
c74f6de9 | 5947 | else { |
ee9b8eae YO |
5948 | |
5949 | /* Currently we only get here when | |
5950 | ||
5951 | PL_rekind[OP(text_node)] == EXACT | |
5952 | ||
5953 | if this changes back then the macro for IS_TEXT and | |
5954 | friends need to change. */ | |
79a2a0e8 | 5955 | if (! S_setup_EXACTISH_ST_c1_c2(aTHX_ |
984e6dd1 DM |
5956 | text_node, &ST.c1, ST.c1_utf8, &ST.c2, ST.c2_utf8, |
5957 | is_utf8_pat)) | |
c74f6de9 KW |
5958 | { |
5959 | sayNO; | |
5960 | } | |
5961 | } | |
1aa99e6b | 5962 | } |
bbce6d69 | 5963 | } |
c255a977 DM |
5964 | |
5965 | ST.A = scan; | |
5966 | ST.B = next; | |
24d3c4a9 | 5967 | if (minmod) { |
eb72505d | 5968 | char *li = locinput; |
24d3c4a9 | 5969 | minmod = 0; |
984e6dd1 DM |
5970 | if (ST.min && |
5971 | regrepeat(rex, &li, ST.A, ST.min, depth, is_utf8_pat) | |
5972 | < ST.min) | |
4633a7c4 | 5973 | sayNO; |
7016d6eb | 5974 | SET_locinput(li); |
c255a977 | 5975 | ST.count = ST.min; |
c255a977 DM |
5976 | REGCP_SET(ST.cp); |
5977 | if (ST.c1 == CHRTEST_VOID) | |
5978 | goto curly_try_B_min; | |
5979 | ||
5980 | ST.oldloc = locinput; | |
5981 | ||
5982 | /* set ST.maxpos to the furthest point along the | |
5983 | * string that could possibly match */ | |
5984 | if (ST.max == REG_INFTY) { | |
5985 | ST.maxpos = PL_regeol - 1; | |
f2ed9b32 | 5986 | if (utf8_target) |
c255a977 DM |
5987 | while (UTF8_IS_CONTINUATION(*(U8*)ST.maxpos)) |
5988 | ST.maxpos--; | |
5989 | } | |
f2ed9b32 | 5990 | else if (utf8_target) { |
c255a977 DM |
5991 | int m = ST.max - ST.min; |
5992 | for (ST.maxpos = locinput; | |
9a902117 | 5993 | m >0 && ST.maxpos < PL_regeol; m--) |
c255a977 DM |
5994 | ST.maxpos += UTF8SKIP(ST.maxpos); |
5995 | } | |
5996 | else { | |
5997 | ST.maxpos = locinput + ST.max - ST.min; | |
5998 | if (ST.maxpos >= PL_regeol) | |
5999 | ST.maxpos = PL_regeol - 1; | |
6000 | } | |
6001 | goto curly_try_B_min_known; | |
6002 | ||
6003 | } | |
6004 | else { | |
eb72505d DM |
6005 | /* avoid taking address of locinput, so it can remain |
6006 | * a register var */ | |
6007 | char *li = locinput; | |
984e6dd1 DM |
6008 | ST.count = regrepeat(rex, &li, ST.A, ST.max, depth, |
6009 | is_utf8_pat); | |
c255a977 DM |
6010 | if (ST.count < ST.min) |
6011 | sayNO; | |
7016d6eb | 6012 | SET_locinput(li); |
c255a977 DM |
6013 | if ((ST.count > ST.min) |
6014 | && (PL_regkind[OP(ST.B)] == EOL) && (OP(ST.B) != MEOL)) | |
6015 | { | |
6016 | /* A{m,n} must come at the end of the string, there's | |
6017 | * no point in backing off ... */ | |
6018 | ST.min = ST.count; | |
6019 | /* ...except that $ and \Z can match before *and* after | |
6020 | newline at the end. Consider "\n\n" =~ /\n+\Z\n/. | |
6021 | We may back off by one in this case. */ | |
eb72505d | 6022 | if (UCHARAT(locinput - 1) == '\n' && OP(ST.B) != EOS) |
c255a977 DM |
6023 | ST.min--; |
6024 | } | |
6025 | REGCP_SET(ST.cp); | |
6026 | goto curly_try_B_max; | |
6027 | } | |
118e2215 | 6028 | assert(0); /* NOTREACHED */ |
c255a977 DM |
6029 | |
6030 | ||
6031 | case CURLY_B_min_known_fail: | |
6032 | /* failed to find B in a non-greedy match where c1,c2 valid */ | |
c255a977 | 6033 | |
c255a977 | 6034 | REGCP_UNWIND(ST.cp); |
a8d1f4b4 DM |
6035 | if (ST.paren) { |
6036 | UNWIND_PAREN(ST.lastparen, ST.lastcloseparen); | |
6037 | } | |
c255a977 DM |
6038 | /* Couldn't or didn't -- move forward. */ |
6039 | ST.oldloc = locinput; | |
f2ed9b32 | 6040 | if (utf8_target) |
c255a977 DM |
6041 | locinput += UTF8SKIP(locinput); |
6042 | else | |
6043 | locinput++; | |
6044 | ST.count++; | |
6045 | curly_try_B_min_known: | |
6046 | /* find the next place where 'B' could work, then call B */ | |
6047 | { | |
6048 | int n; | |
f2ed9b32 | 6049 | if (utf8_target) { |
c255a977 DM |
6050 | n = (ST.oldloc == locinput) ? 0 : 1; |
6051 | if (ST.c1 == ST.c2) { | |
c255a977 | 6052 | /* set n to utf8_distance(oldloc, locinput) */ |
79a2a0e8 KW |
6053 | while (locinput <= ST.maxpos |
6054 | && memNE(locinput, ST.c1_utf8, UTF8SKIP(locinput))) | |
6055 | { | |
6056 | locinput += UTF8SKIP(locinput); | |
c255a977 DM |
6057 | n++; |
6058 | } | |
1aa99e6b IH |
6059 | } |
6060 | else { | |
c255a977 | 6061 | /* set n to utf8_distance(oldloc, locinput) */ |
79a2a0e8 KW |
6062 | while (locinput <= ST.maxpos |
6063 | && memNE(locinput, ST.c1_utf8, UTF8SKIP(locinput)) | |
6064 | && memNE(locinput, ST.c2_utf8, UTF8SKIP(locinput))) | |
6065 | { | |
6066 | locinput += UTF8SKIP(locinput); | |
c255a977 | 6067 | n++; |
1aa99e6b | 6068 | } |
0fe9bf95 IZ |
6069 | } |
6070 | } | |
5400f398 | 6071 | else { /* Not utf8_target */ |
c255a977 DM |
6072 | if (ST.c1 == ST.c2) { |
6073 | while (locinput <= ST.maxpos && | |
6074 | UCHARAT(locinput) != ST.c1) | |
6075 | locinput++; | |
bbce6d69 | 6076 | } |
c255a977 DM |
6077 | else { |
6078 | while (locinput <= ST.maxpos | |
6079 | && UCHARAT(locinput) != ST.c1 | |
6080 | && UCHARAT(locinput) != ST.c2) | |
6081 | locinput++; | |
a0ed51b3 | 6082 | } |
c255a977 DM |
6083 | n = locinput - ST.oldloc; |
6084 | } | |
6085 | if (locinput > ST.maxpos) | |
6086 | sayNO; | |
c255a977 | 6087 | if (n) { |
eb72505d DM |
6088 | /* In /a{m,n}b/, ST.oldloc is at "a" x m, locinput is |
6089 | * at b; check that everything between oldloc and | |
6090 | * locinput matches */ | |
6091 | char *li = ST.oldloc; | |
c255a977 | 6092 | ST.count += n; |
984e6dd1 | 6093 | if (regrepeat(rex, &li, ST.A, n, depth, is_utf8_pat) < n) |
4633a7c4 | 6094 | sayNO; |
eb72505d | 6095 | assert(n == REG_INFTY || locinput == li); |
a0d0e21e | 6096 | } |
c255a977 | 6097 | CURLY_SETPAREN(ST.paren, ST.count); |
0a4db386 | 6098 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 6099 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
0a4db386 YO |
6100 | goto fake_end; |
6101 | } | |
4d5016e5 | 6102 | PUSH_STATE_GOTO(CURLY_B_min_known, ST.B, locinput); |
a0d0e21e | 6103 | } |
118e2215 | 6104 | assert(0); /* NOTREACHED */ |
c255a977 DM |
6105 | |
6106 | ||
6107 | case CURLY_B_min_fail: | |
6108 | /* failed to find B in a non-greedy match where c1,c2 invalid */ | |
c255a977 DM |
6109 | |
6110 | REGCP_UNWIND(ST.cp); | |
a8d1f4b4 DM |
6111 | if (ST.paren) { |
6112 | UNWIND_PAREN(ST.lastparen, ST.lastcloseparen); | |
6113 | } | |
c255a977 | 6114 | /* failed -- move forward one */ |
f73aaa43 | 6115 | { |
eb72505d | 6116 | char *li = locinput; |
984e6dd1 | 6117 | if (!regrepeat(rex, &li, ST.A, 1, depth, is_utf8_pat)) { |
f73aaa43 DM |
6118 | sayNO; |
6119 | } | |
eb72505d | 6120 | locinput = li; |
f73aaa43 DM |
6121 | } |
6122 | { | |
c255a977 | 6123 | ST.count++; |
c255a977 DM |
6124 | if (ST.count <= ST.max || (ST.max == REG_INFTY && |
6125 | ST.count > 0)) /* count overflow ? */ | |
15272685 | 6126 | { |
c255a977 DM |
6127 | curly_try_B_min: |
6128 | CURLY_SETPAREN(ST.paren, ST.count); | |
0a4db386 | 6129 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 6130 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
0a4db386 YO |
6131 | goto fake_end; |
6132 | } | |
4d5016e5 | 6133 | PUSH_STATE_GOTO(CURLY_B_min, ST.B, locinput); |
a0d0e21e LW |
6134 | } |
6135 | } | |
c74f6de9 | 6136 | sayNO; |
118e2215 | 6137 | assert(0); /* NOTREACHED */ |
c255a977 DM |
6138 | |
6139 | ||
6140 | curly_try_B_max: | |
6141 | /* a successful greedy match: now try to match B */ | |
40d049e4 | 6142 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 6143 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
40d049e4 YO |
6144 | goto fake_end; |
6145 | } | |
c255a977 | 6146 | { |
79a2a0e8 KW |
6147 | bool could_match = locinput < PL_regeol; |
6148 | ||
c255a977 | 6149 | /* If it could work, try it. */ |
79a2a0e8 KW |
6150 | if (ST.c1 != CHRTEST_VOID && could_match) { |
6151 | if (! UTF8_IS_INVARIANT(UCHARAT(locinput)) && utf8_target) | |
6152 | { | |
6153 | could_match = memEQ(locinput, | |
6154 | ST.c1_utf8, | |
6155 | UTF8SKIP(locinput)) | |
6156 | || memEQ(locinput, | |
6157 | ST.c2_utf8, | |
6158 | UTF8SKIP(locinput)); | |
6159 | } | |
6160 | else { | |
6161 | could_match = UCHARAT(locinput) == ST.c1 | |
6162 | || UCHARAT(locinput) == ST.c2; | |
6163 | } | |
6164 | } | |
6165 | if (ST.c1 == CHRTEST_VOID || could_match) { | |
c255a977 | 6166 | CURLY_SETPAREN(ST.paren, ST.count); |
4d5016e5 | 6167 | PUSH_STATE_GOTO(CURLY_B_max, ST.B, locinput); |
118e2215 | 6168 | assert(0); /* NOTREACHED */ |
c255a977 DM |
6169 | } |
6170 | } | |
6171 | /* FALL THROUGH */ | |
3c0563b9 | 6172 | |
c255a977 DM |
6173 | case CURLY_B_max_fail: |
6174 | /* failed to find B in a greedy match */ | |
c255a977 DM |
6175 | |
6176 | REGCP_UNWIND(ST.cp); | |
a8d1f4b4 DM |
6177 | if (ST.paren) { |
6178 | UNWIND_PAREN(ST.lastparen, ST.lastcloseparen); | |
6179 | } | |
c255a977 DM |
6180 | /* back up. */ |
6181 | if (--ST.count < ST.min) | |
6182 | sayNO; | |
eb72505d | 6183 | locinput = HOPc(locinput, -1); |
c255a977 DM |
6184 | goto curly_try_B_max; |
6185 | ||
6186 | #undef ST | |
6187 | ||
3c0563b9 | 6188 | case END: /* last op of main pattern */ |
6bda09f9 | 6189 | fake_end: |
faec1544 DM |
6190 | if (cur_eval) { |
6191 | /* we've just finished A in /(??{A})B/; now continue with B */ | |
984e6dd1 DM |
6192 | st->u.eval.saved_utf8_pat = is_utf8_pat; |
6193 | is_utf8_pat = cur_eval->u.eval.saved_utf8_pat; | |
faec1544 | 6194 | |
288b8c02 | 6195 | st->u.eval.prev_rex = rex_sv; /* inner */ |
92da3157 DM |
6196 | |
6197 | /* Save *all* the positions. */ | |
6198 | st->u.eval.cp = regcppush(rex, 0, maxopenparen); | |
ec43f78b DM |
6199 | rex_sv = cur_eval->u.eval.prev_rex; |
6200 | SET_reg_curpm(rex_sv); | |
8d919b0a | 6201 | rex = ReANY(rex_sv); |
f8fc2ecf | 6202 | rexi = RXi_GET(rex); |
faec1544 | 6203 | cur_curlyx = cur_eval->u.eval.prev_curlyx; |
34a81e2b | 6204 | |
faec1544 | 6205 | REGCP_SET(st->u.eval.lastcp); |
faec1544 DM |
6206 | |
6207 | /* Restore parens of the outer rex without popping the | |
6208 | * savestack */ | |
92da3157 DM |
6209 | S_regcp_restore(aTHX_ rex, cur_eval->u.eval.lastcp, |
6210 | &maxopenparen); | |
faec1544 DM |
6211 | |
6212 | st->u.eval.prev_eval = cur_eval; | |
6213 | cur_eval = cur_eval->u.eval.prev_eval; | |
6214 | DEBUG_EXECUTE_r( | |
2a49f0f5 JH |
6215 | PerlIO_printf(Perl_debug_log, "%*s EVAL trying tail ... %"UVxf"\n", |
6216 | REPORT_CODE_OFF+depth*2, "",PTR2UV(cur_eval));); | |
e7707071 YO |
6217 | if ( nochange_depth ) |
6218 | nochange_depth--; | |
6219 | ||
4d5016e5 DM |
6220 | PUSH_YES_STATE_GOTO(EVAL_AB, st->u.eval.prev_eval->u.eval.B, |
6221 | locinput); /* match B */ | |
faec1544 DM |
6222 | } |
6223 | ||
3b0527fe | 6224 | if (locinput < reginfo->till) { |
a3621e74 | 6225 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
7821416a IZ |
6226 | "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n", |
6227 | PL_colors[4], | |
6228 | (long)(locinput - PL_reg_starttry), | |
3b0527fe | 6229 | (long)(reginfo->till - PL_reg_starttry), |
7821416a | 6230 | PL_colors[5])); |
58e23c8d | 6231 | |
262b90c4 | 6232 | sayNO_SILENT; /* Cannot match: too short. */ |
7821416a | 6233 | } |
262b90c4 | 6234 | sayYES; /* Success! */ |
dad79028 DM |
6235 | |
6236 | case SUCCEED: /* successful SUSPEND/UNLESSM/IFMATCH/CURLYM */ | |
6237 | DEBUG_EXECUTE_r( | |
6238 | PerlIO_printf(Perl_debug_log, | |
6239 | "%*s %ssubpattern success...%s\n", | |
5bc10b2c | 6240 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])); |
262b90c4 | 6241 | sayYES; /* Success! */ |
dad79028 | 6242 | |
40a82448 DM |
6243 | #undef ST |
6244 | #define ST st->u.ifmatch | |
6245 | ||
37f53970 DM |
6246 | { |
6247 | char *newstart; | |
6248 | ||
40a82448 DM |
6249 | case SUSPEND: /* (?>A) */ |
6250 | ST.wanted = 1; | |
37f53970 | 6251 | newstart = locinput; |
9041c2e3 | 6252 | goto do_ifmatch; |
dad79028 | 6253 | |
40a82448 DM |
6254 | case UNLESSM: /* -ve lookaround: (?!A), or with flags, (?<!A) */ |
6255 | ST.wanted = 0; | |
dad79028 DM |
6256 | goto ifmatch_trivial_fail_test; |
6257 | ||
40a82448 DM |
6258 | case IFMATCH: /* +ve lookaround: (?=A), or with flags, (?<=A) */ |
6259 | ST.wanted = 1; | |
dad79028 | 6260 | ifmatch_trivial_fail_test: |
a0ed51b3 | 6261 | if (scan->flags) { |
52657f30 | 6262 | char * const s = HOPBACKc(locinput, scan->flags); |
dad79028 DM |
6263 | if (!s) { |
6264 | /* trivial fail */ | |
24d3c4a9 DM |
6265 | if (logical) { |
6266 | logical = 0; | |
f2338a2e | 6267 | sw = 1 - cBOOL(ST.wanted); |
dad79028 | 6268 | } |
40a82448 | 6269 | else if (ST.wanted) |
dad79028 DM |
6270 | sayNO; |
6271 | next = scan + ARG(scan); | |
6272 | if (next == scan) | |
6273 | next = NULL; | |
6274 | break; | |
6275 | } | |
37f53970 | 6276 | newstart = s; |
a0ed51b3 LW |
6277 | } |
6278 | else | |
37f53970 | 6279 | newstart = locinput; |
a0ed51b3 | 6280 | |
c277df42 | 6281 | do_ifmatch: |
40a82448 | 6282 | ST.me = scan; |
24d3c4a9 | 6283 | ST.logical = logical; |
24d786f4 YO |
6284 | logical = 0; /* XXX: reset state of logical once it has been saved into ST */ |
6285 | ||
40a82448 | 6286 | /* execute body of (?...A) */ |
37f53970 | 6287 | PUSH_YES_STATE_GOTO(IFMATCH_A, NEXTOPER(NEXTOPER(scan)), newstart); |
118e2215 | 6288 | assert(0); /* NOTREACHED */ |
37f53970 | 6289 | } |
40a82448 DM |
6290 | |
6291 | case IFMATCH_A_fail: /* body of (?...A) failed */ | |
6292 | ST.wanted = !ST.wanted; | |
6293 | /* FALL THROUGH */ | |
6294 | ||
6295 | case IFMATCH_A: /* body of (?...A) succeeded */ | |
24d3c4a9 | 6296 | if (ST.logical) { |
f2338a2e | 6297 | sw = cBOOL(ST.wanted); |
40a82448 DM |
6298 | } |
6299 | else if (!ST.wanted) | |
6300 | sayNO; | |
6301 | ||
37f53970 DM |
6302 | if (OP(ST.me) != SUSPEND) { |
6303 | /* restore old position except for (?>...) */ | |
6304 | locinput = st->locinput; | |
40a82448 DM |
6305 | } |
6306 | scan = ST.me + ARG(ST.me); | |
6307 | if (scan == ST.me) | |
6308 | scan = NULL; | |
6309 | continue; /* execute B */ | |
6310 | ||
6311 | #undef ST | |
dad79028 | 6312 | |
3c0563b9 DM |
6313 | case LONGJMP: /* alternative with many branches compiles to |
6314 | * (BRANCHJ; EXACT ...; LONGJMP ) x N */ | |
c277df42 IZ |
6315 | next = scan + ARG(scan); |
6316 | if (next == scan) | |
6317 | next = NULL; | |
a0d0e21e | 6318 | break; |
3c0563b9 DM |
6319 | |
6320 | case COMMIT: /* (*COMMIT) */ | |
e2e6a0f1 YO |
6321 | reginfo->cutpoint = PL_regeol; |
6322 | /* FALLTHROUGH */ | |
3c0563b9 DM |
6323 | |
6324 | case PRUNE: /* (*PRUNE) */ | |
e2e6a0f1 | 6325 | if (!scan->flags) |
ad64d0ec | 6326 | sv_yes_mark = sv_commit = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]); |
4d5016e5 | 6327 | PUSH_STATE_GOTO(COMMIT_next, next, locinput); |
118e2215 | 6328 | assert(0); /* NOTREACHED */ |
3c0563b9 | 6329 | |
54612592 YO |
6330 | case COMMIT_next_fail: |
6331 | no_final = 1; | |
6332 | /* FALLTHROUGH */ | |
3c0563b9 DM |
6333 | |
6334 | case OPFAIL: /* (*FAIL) */ | |
7f69552c | 6335 | sayNO; |
118e2215 | 6336 | assert(0); /* NOTREACHED */ |
e2e6a0f1 YO |
6337 | |
6338 | #define ST st->u.mark | |
3c0563b9 | 6339 | case MARKPOINT: /* (*MARK:foo) */ |
e2e6a0f1 | 6340 | ST.prev_mark = mark_state; |
5d458dd8 | 6341 | ST.mark_name = sv_commit = sv_yes_mark |
ad64d0ec | 6342 | = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]); |
e2e6a0f1 | 6343 | mark_state = st; |
4d5016e5 DM |
6344 | ST.mark_loc = locinput; |
6345 | PUSH_YES_STATE_GOTO(MARKPOINT_next, next, locinput); | |
118e2215 | 6346 | assert(0); /* NOTREACHED */ |
3c0563b9 | 6347 | |
e2e6a0f1 YO |
6348 | case MARKPOINT_next: |
6349 | mark_state = ST.prev_mark; | |
6350 | sayYES; | |
118e2215 | 6351 | assert(0); /* NOTREACHED */ |
3c0563b9 | 6352 | |
e2e6a0f1 | 6353 | case MARKPOINT_next_fail: |
5d458dd8 | 6354 | if (popmark && sv_eq(ST.mark_name,popmark)) |
e2e6a0f1 YO |
6355 | { |
6356 | if (ST.mark_loc > startpoint) | |
6357 | reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1); | |
6358 | popmark = NULL; /* we found our mark */ | |
6359 | sv_commit = ST.mark_name; | |
6360 | ||
6361 | DEBUG_EXECUTE_r({ | |
5d458dd8 | 6362 | PerlIO_printf(Perl_debug_log, |
e2e6a0f1 YO |
6363 | "%*s %ssetting cutpoint to mark:%"SVf"...%s\n", |
6364 | REPORT_CODE_OFF+depth*2, "", | |
be2597df | 6365 | PL_colors[4], SVfARG(sv_commit), PL_colors[5]); |
e2e6a0f1 YO |
6366 | }); |
6367 | } | |
6368 | mark_state = ST.prev_mark; | |
5d458dd8 YO |
6369 | sv_yes_mark = mark_state ? |
6370 | mark_state->u.mark.mark_name : NULL; | |
e2e6a0f1 | 6371 | sayNO; |
118e2215 | 6372 | assert(0); /* NOTREACHED */ |
3c0563b9 DM |
6373 | |
6374 | case SKIP: /* (*SKIP) */ | |
5d458dd8 | 6375 | if (scan->flags) { |
2bf803e2 | 6376 | /* (*SKIP) : if we fail we cut here*/ |
5d458dd8 | 6377 | ST.mark_name = NULL; |
e2e6a0f1 | 6378 | ST.mark_loc = locinput; |
4d5016e5 | 6379 | PUSH_STATE_GOTO(SKIP_next,next, locinput); |
5d458dd8 | 6380 | } else { |
2bf803e2 | 6381 | /* (*SKIP:NAME) : if there is a (*MARK:NAME) fail where it was, |
5d458dd8 YO |
6382 | otherwise do nothing. Meaning we need to scan |
6383 | */ | |
6384 | regmatch_state *cur = mark_state; | |
ad64d0ec | 6385 | SV *find = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]); |
5d458dd8 YO |
6386 | |
6387 | while (cur) { | |
6388 | if ( sv_eq( cur->u.mark.mark_name, | |
6389 | find ) ) | |
6390 | { | |
6391 | ST.mark_name = find; | |
4d5016e5 | 6392 | PUSH_STATE_GOTO( SKIP_next, next, locinput); |
5d458dd8 YO |
6393 | } |
6394 | cur = cur->u.mark.prev_mark; | |
6395 | } | |
e2e6a0f1 | 6396 | } |
2bf803e2 | 6397 | /* Didn't find our (*MARK:NAME) so ignore this (*SKIP:NAME) */ |
5d458dd8 | 6398 | break; |
3c0563b9 | 6399 | |
5d458dd8 YO |
6400 | case SKIP_next_fail: |
6401 | if (ST.mark_name) { | |
6402 | /* (*CUT:NAME) - Set up to search for the name as we | |
6403 | collapse the stack*/ | |
6404 | popmark = ST.mark_name; | |
6405 | } else { | |
6406 | /* (*CUT) - No name, we cut here.*/ | |
e2e6a0f1 YO |
6407 | if (ST.mark_loc > startpoint) |
6408 | reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1); | |
5d458dd8 YO |
6409 | /* but we set sv_commit to latest mark_name if there |
6410 | is one so they can test to see how things lead to this | |
6411 | cut */ | |
6412 | if (mark_state) | |
6413 | sv_commit=mark_state->u.mark.mark_name; | |
6414 | } | |
e2e6a0f1 YO |
6415 | no_final = 1; |
6416 | sayNO; | |
118e2215 | 6417 | assert(0); /* NOTREACHED */ |
e2e6a0f1 | 6418 | #undef ST |
3c0563b9 DM |
6419 | |
6420 | case LNBREAK: /* \R */ | |
7016d6eb | 6421 | if ((n=is_LNBREAK_safe(locinput, PL_regeol, utf8_target))) { |
e1d1eefb | 6422 | locinput += n; |
e1d1eefb YO |
6423 | } else |
6424 | sayNO; | |
6425 | break; | |
6426 | ||
a0d0e21e | 6427 | default: |
b900a521 | 6428 | PerlIO_printf(Perl_error_log, "%"UVxf" %d\n", |
d7d93a81 | 6429 | PTR2UV(scan), OP(scan)); |
cea2e8a9 | 6430 | Perl_croak(aTHX_ "regexp memory corruption"); |
28b98f76 DM |
6431 | |
6432 | /* this is a point to jump to in order to increment | |
6433 | * locinput by one character */ | |
6434 | increment_locinput: | |
e6ca698c | 6435 | assert(!NEXTCHR_IS_EOS); |
28b98f76 DM |
6436 | if (utf8_target) { |
6437 | locinput += PL_utf8skip[nextchr]; | |
7016d6eb | 6438 | /* locinput is allowed to go 1 char off the end, but not 2+ */ |
28b98f76 DM |
6439 | if (locinput > PL_regeol) |
6440 | sayNO; | |
28b98f76 DM |
6441 | } |
6442 | else | |
3640db6b | 6443 | locinput++; |
28b98f76 | 6444 | break; |
5d458dd8 YO |
6445 | |
6446 | } /* end switch */ | |
95b24440 | 6447 | |
5d458dd8 YO |
6448 | /* switch break jumps here */ |
6449 | scan = next; /* prepare to execute the next op and ... */ | |
6450 | continue; /* ... jump back to the top, reusing st */ | |
118e2215 | 6451 | assert(0); /* NOTREACHED */ |
95b24440 | 6452 | |
40a82448 DM |
6453 | push_yes_state: |
6454 | /* push a state that backtracks on success */ | |
6455 | st->u.yes.prev_yes_state = yes_state; | |
6456 | yes_state = st; | |
6457 | /* FALL THROUGH */ | |
6458 | push_state: | |
6459 | /* push a new regex state, then continue at scan */ | |
6460 | { | |
6461 | regmatch_state *newst; | |
6462 | ||
24b23f37 YO |
6463 | DEBUG_STACK_r({ |
6464 | regmatch_state *cur = st; | |
6465 | regmatch_state *curyes = yes_state; | |
6466 | int curd = depth; | |
6467 | regmatch_slab *slab = PL_regmatch_slab; | |
6468 | for (;curd > -1;cur--,curd--) { | |
6469 | if (cur < SLAB_FIRST(slab)) { | |
6470 | slab = slab->prev; | |
6471 | cur = SLAB_LAST(slab); | |
6472 | } | |
6473 | PerlIO_printf(Perl_error_log, "%*s#%-3d %-10s %s\n", | |
6474 | REPORT_CODE_OFF + 2 + depth * 2,"", | |
13d6edb4 | 6475 | curd, PL_reg_name[cur->resume_state], |
24b23f37 YO |
6476 | (curyes == cur) ? "yes" : "" |
6477 | ); | |
6478 | if (curyes == cur) | |
6479 | curyes = cur->u.yes.prev_yes_state; | |
6480 | } | |
6481 | } else | |
6482 | DEBUG_STATE_pp("push") | |
6483 | ); | |
40a82448 | 6484 | depth++; |
40a82448 DM |
6485 | st->locinput = locinput; |
6486 | newst = st+1; | |
6487 | if (newst > SLAB_LAST(PL_regmatch_slab)) | |
6488 | newst = S_push_slab(aTHX); | |
6489 | PL_regmatch_state = newst; | |
786e8c11 | 6490 | |
4d5016e5 | 6491 | locinput = pushinput; |
40a82448 DM |
6492 | st = newst; |
6493 | continue; | |
118e2215 | 6494 | assert(0); /* NOTREACHED */ |
40a82448 | 6495 | } |
a0d0e21e | 6496 | } |
a687059c | 6497 | |
a0d0e21e LW |
6498 | /* |
6499 | * We get here only if there's trouble -- normally "case END" is | |
6500 | * the terminating point. | |
6501 | */ | |
cea2e8a9 | 6502 | Perl_croak(aTHX_ "corrupted regexp pointers"); |
a0d0e21e | 6503 | /*NOTREACHED*/ |
4633a7c4 LW |
6504 | sayNO; |
6505 | ||
262b90c4 | 6506 | yes: |
77cb431f DM |
6507 | if (yes_state) { |
6508 | /* we have successfully completed a subexpression, but we must now | |
6509 | * pop to the state marked by yes_state and continue from there */ | |
77cb431f | 6510 | assert(st != yes_state); |
5bc10b2c DM |
6511 | #ifdef DEBUGGING |
6512 | while (st != yes_state) { | |
6513 | st--; | |
6514 | if (st < SLAB_FIRST(PL_regmatch_slab)) { | |
6515 | PL_regmatch_slab = PL_regmatch_slab->prev; | |
6516 | st = SLAB_LAST(PL_regmatch_slab); | |
6517 | } | |
e2e6a0f1 | 6518 | DEBUG_STATE_r({ |
54612592 YO |
6519 | if (no_final) { |
6520 | DEBUG_STATE_pp("pop (no final)"); | |
6521 | } else { | |
6522 | DEBUG_STATE_pp("pop (yes)"); | |
6523 | } | |
e2e6a0f1 | 6524 | }); |
5bc10b2c DM |
6525 | depth--; |
6526 | } | |
6527 | #else | |
77cb431f DM |
6528 | while (yes_state < SLAB_FIRST(PL_regmatch_slab) |
6529 | || yes_state > SLAB_LAST(PL_regmatch_slab)) | |
6530 | { | |
6531 | /* not in this slab, pop slab */ | |
6532 | depth -= (st - SLAB_FIRST(PL_regmatch_slab) + 1); | |
6533 | PL_regmatch_slab = PL_regmatch_slab->prev; | |
6534 | st = SLAB_LAST(PL_regmatch_slab); | |
6535 | } | |
6536 | depth -= (st - yes_state); | |
5bc10b2c | 6537 | #endif |
77cb431f DM |
6538 | st = yes_state; |
6539 | yes_state = st->u.yes.prev_yes_state; | |
6540 | PL_regmatch_state = st; | |
24b23f37 | 6541 | |
3640db6b | 6542 | if (no_final) |
5d458dd8 | 6543 | locinput= st->locinput; |
54612592 | 6544 | state_num = st->resume_state + no_final; |
24d3c4a9 | 6545 | goto reenter_switch; |
77cb431f DM |
6546 | } |
6547 | ||
a3621e74 | 6548 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n", |
e4584336 | 6549 | PL_colors[4], PL_colors[5])); |
02db2b7b | 6550 | |
ed301438 | 6551 | if (PL_reg_state.re_state_eval_setup_done) { |
19b95bf0 DM |
6552 | /* each successfully executed (?{...}) block does the equivalent of |
6553 | * local $^R = do {...} | |
6554 | * When popping the save stack, all these locals would be undone; | |
6555 | * bypass this by setting the outermost saved $^R to the latest | |
6556 | * value */ | |
6557 | if (oreplsv != GvSV(PL_replgv)) | |
6558 | sv_setsv(oreplsv, GvSV(PL_replgv)); | |
6559 | } | |
95b24440 | 6560 | result = 1; |
aa283a38 | 6561 | goto final_exit; |
4633a7c4 LW |
6562 | |
6563 | no: | |
a3621e74 | 6564 | DEBUG_EXECUTE_r( |
7821416a | 6565 | PerlIO_printf(Perl_debug_log, |
786e8c11 | 6566 | "%*s %sfailed...%s\n", |
5bc10b2c | 6567 | REPORT_CODE_OFF+depth*2, "", |
786e8c11 | 6568 | PL_colors[4], PL_colors[5]) |
7821416a | 6569 | ); |
aa283a38 | 6570 | |
262b90c4 | 6571 | no_silent: |
54612592 YO |
6572 | if (no_final) { |
6573 | if (yes_state) { | |
6574 | goto yes; | |
6575 | } else { | |
6576 | goto final_exit; | |
6577 | } | |
6578 | } | |
aa283a38 DM |
6579 | if (depth) { |
6580 | /* there's a previous state to backtrack to */ | |
40a82448 DM |
6581 | st--; |
6582 | if (st < SLAB_FIRST(PL_regmatch_slab)) { | |
6583 | PL_regmatch_slab = PL_regmatch_slab->prev; | |
6584 | st = SLAB_LAST(PL_regmatch_slab); | |
6585 | } | |
6586 | PL_regmatch_state = st; | |
40a82448 | 6587 | locinput= st->locinput; |
40a82448 | 6588 | |
5bc10b2c DM |
6589 | DEBUG_STATE_pp("pop"); |
6590 | depth--; | |
262b90c4 DM |
6591 | if (yes_state == st) |
6592 | yes_state = st->u.yes.prev_yes_state; | |
5bc10b2c | 6593 | |
24d3c4a9 DM |
6594 | state_num = st->resume_state + 1; /* failure = success + 1 */ |
6595 | goto reenter_switch; | |
95b24440 | 6596 | } |
24d3c4a9 | 6597 | result = 0; |
aa283a38 | 6598 | |
262b90c4 | 6599 | final_exit: |
bbe252da | 6600 | if (rex->intflags & PREGf_VERBARG_SEEN) { |
5d458dd8 YO |
6601 | SV *sv_err = get_sv("REGERROR", 1); |
6602 | SV *sv_mrk = get_sv("REGMARK", 1); | |
6603 | if (result) { | |
e2e6a0f1 | 6604 | sv_commit = &PL_sv_no; |
5d458dd8 YO |
6605 | if (!sv_yes_mark) |
6606 | sv_yes_mark = &PL_sv_yes; | |
6607 | } else { | |
6608 | if (!sv_commit) | |
6609 | sv_commit = &PL_sv_yes; | |
6610 | sv_yes_mark = &PL_sv_no; | |
6611 | } | |
6612 | sv_setsv(sv_err, sv_commit); | |
6613 | sv_setsv(sv_mrk, sv_yes_mark); | |
e2e6a0f1 | 6614 | } |
19b95bf0 | 6615 | |
81ed78b2 DM |
6616 | |
6617 | if (last_pushed_cv) { | |
6618 | dSP; | |
6619 | POP_MULTICALL; | |
4f8dbb2d | 6620 | PERL_UNUSED_VAR(SP); |
81ed78b2 DM |
6621 | } |
6622 | ||
2f554ef7 DM |
6623 | /* clean up; in particular, free all slabs above current one */ |
6624 | LEAVE_SCOPE(oldsave); | |
5d9a96ca | 6625 | |
730f4c74 DM |
6626 | assert(!result || locinput - PL_bostr >= 0); |
6627 | return result ? locinput - PL_bostr : -1; | |
a687059c LW |
6628 | } |
6629 | ||
6630 | /* | |
6631 | - regrepeat - repeatedly match something simple, report how many | |
d60de1d1 | 6632 | * |
e64f369d KW |
6633 | * What 'simple' means is a node which can be the operand of a quantifier like |
6634 | * '+', or {1,3} | |
6635 | * | |
d60de1d1 DM |
6636 | * startposp - pointer a pointer to the start position. This is updated |
6637 | * to point to the byte following the highest successful | |
6638 | * match. | |
6639 | * p - the regnode to be repeatedly matched against. | |
4063ade8 | 6640 | * max - maximum number of things to match. |
d60de1d1 | 6641 | * depth - (for debugging) backtracking depth. |
a687059c | 6642 | */ |
76e3520e | 6643 | STATIC I32 |
272d35c9 | 6644 | S_regrepeat(pTHX_ regexp *prog, char **startposp, const regnode *p, |
984e6dd1 | 6645 | I32 max, int depth, bool is_utf8_pat) |
a687059c | 6646 | { |
27da23d5 | 6647 | dVAR; |
4063ade8 | 6648 | char *scan; /* Pointer to current position in target string */ |
eb578fdb | 6649 | I32 c; |
4063ade8 KW |
6650 | char *loceol = PL_regeol; /* local version */ |
6651 | I32 hardcount = 0; /* How many matches so far */ | |
eb578fdb | 6652 | bool utf8_target = PL_reg_match_utf8; |
3018b823 | 6653 | int to_complement = 0; /* Invert the result? */ |
d513472c | 6654 | UV utf8_flags; |
3018b823 | 6655 | _char_class_number classnum; |
4f55667c SP |
6656 | #ifndef DEBUGGING |
6657 | PERL_UNUSED_ARG(depth); | |
6658 | #endif | |
a0d0e21e | 6659 | |
7918f24d NC |
6660 | PERL_ARGS_ASSERT_REGREPEAT; |
6661 | ||
f73aaa43 | 6662 | scan = *startposp; |
faf11cac HS |
6663 | if (max == REG_INFTY) |
6664 | max = I32_MAX; | |
4063ade8 | 6665 | else if (! utf8_target && scan + max < loceol) |
7f596f4c | 6666 | loceol = scan + max; |
4063ade8 KW |
6667 | |
6668 | /* Here, for the case of a non-UTF-8 target we have adjusted <loceol> down | |
6669 | * to the maximum of how far we should go in it (leaving it set to the real | |
6670 | * end, if the maximum permissible would take us beyond that). This allows | |
6671 | * us to make the loop exit condition that we haven't gone past <loceol> to | |
6672 | * also mean that we haven't exceeded the max permissible count, saving a | |
6673 | * test each time through the loop. But it assumes that the OP matches a | |
6674 | * single byte, which is true for most of the OPs below when applied to a | |
6675 | * non-UTF-8 target. Those relatively few OPs that don't have this | |
6676 | * characteristic will have to compensate. | |
6677 | * | |
6678 | * There is no adjustment for UTF-8 targets, as the number of bytes per | |
6679 | * character varies. OPs will have to test both that the count is less | |
6680 | * than the max permissible (using <hardcount> to keep track), and that we | |
6681 | * are still within the bounds of the string (using <loceol>. A few OPs | |
6682 | * match a single byte no matter what the encoding. They can omit the max | |
6683 | * test if, for the UTF-8 case, they do the adjustment that was skipped | |
6684 | * above. | |
6685 | * | |
6686 | * Thus, the code above sets things up for the common case; and exceptional | |
6687 | * cases need extra work; the common case is to make sure <scan> doesn't | |
6688 | * go past <loceol>, and for UTF-8 to also use <hardcount> to make sure the | |
6689 | * count doesn't exceed the maximum permissible */ | |
6690 | ||
a0d0e21e | 6691 | switch (OP(p)) { |
22c35a8c | 6692 | case REG_ANY: |
f2ed9b32 | 6693 | if (utf8_target) { |
1aa99e6b | 6694 | while (scan < loceol && hardcount < max && *scan != '\n') { |
ffc61ed2 JH |
6695 | scan += UTF8SKIP(scan); |
6696 | hardcount++; | |
6697 | } | |
6698 | } else { | |
6699 | while (scan < loceol && *scan != '\n') | |
6700 | scan++; | |
a0ed51b3 LW |
6701 | } |
6702 | break; | |
ffc61ed2 | 6703 | case SANY: |
f2ed9b32 | 6704 | if (utf8_target) { |
a0804c9e | 6705 | while (scan < loceol && hardcount < max) { |
def8e4ea JH |
6706 | scan += UTF8SKIP(scan); |
6707 | hardcount++; | |
6708 | } | |
6709 | } | |
6710 | else | |
6711 | scan = loceol; | |
a0ed51b3 | 6712 | break; |
4063ade8 KW |
6713 | case CANY: /* Move <scan> forward <max> bytes, unless goes off end */ |
6714 | if (utf8_target && scan + max < loceol) { | |
6715 | ||
6716 | /* <loceol> hadn't been adjusted in the UTF-8 case */ | |
6717 | scan += max; | |
6718 | } | |
6719 | else { | |
6720 | scan = loceol; | |
6721 | } | |
f33976b4 | 6722 | break; |
59d32103 | 6723 | case EXACT: |
984e6dd1 | 6724 | assert(STR_LEN(p) == is_utf8_pat ? UTF8SKIP(STRING(p)) : 1); |
613a425d | 6725 | |
59d32103 | 6726 | c = (U8)*STRING(p); |
59d32103 | 6727 | |
5e4a1da1 KW |
6728 | /* Can use a simple loop if the pattern char to match on is invariant |
6729 | * under UTF-8, or both target and pattern aren't UTF-8. Note that we | |
6730 | * can use UTF8_IS_INVARIANT() even if the pattern isn't UTF-8, as it's | |
6731 | * true iff it doesn't matter if the argument is in UTF-8 or not */ | |
984e6dd1 | 6732 | if (UTF8_IS_INVARIANT(c) || (! utf8_target && ! is_utf8_pat)) { |
4063ade8 KW |
6733 | if (utf8_target && scan + max < loceol) { |
6734 | /* We didn't adjust <loceol> because is UTF-8, but ok to do so, | |
6735 | * since here, to match at all, 1 char == 1 byte */ | |
6736 | loceol = scan + max; | |
6737 | } | |
59d32103 KW |
6738 | while (scan < loceol && UCHARAT(scan) == c) { |
6739 | scan++; | |
6740 | } | |
6741 | } | |
984e6dd1 | 6742 | else if (is_utf8_pat) { |
5e4a1da1 KW |
6743 | if (utf8_target) { |
6744 | STRLEN scan_char_len; | |
5e4a1da1 | 6745 | |
4063ade8 | 6746 | /* When both target and pattern are UTF-8, we have to do |
5e4a1da1 KW |
6747 | * string EQ */ |
6748 | while (hardcount < max | |
9a902117 KW |
6749 | && scan < loceol |
6750 | && (scan_char_len = UTF8SKIP(scan)) <= STR_LEN(p) | |
5e4a1da1 KW |
6751 | && memEQ(scan, STRING(p), scan_char_len)) |
6752 | { | |
4200a00c | 6753 | scan += scan_char_len; |
5e4a1da1 KW |
6754 | hardcount++; |
6755 | } | |
6756 | } | |
6757 | else if (! UTF8_IS_ABOVE_LATIN1(c)) { | |
b40a2c17 | 6758 | |
5e4a1da1 KW |
6759 | /* Target isn't utf8; convert the character in the UTF-8 |
6760 | * pattern to non-UTF8, and do a simple loop */ | |
6761 | c = TWO_BYTE_UTF8_TO_UNI(c, *(STRING(p) + 1)); | |
6762 | while (scan < loceol && UCHARAT(scan) == c) { | |
6763 | scan++; | |
6764 | } | |
6765 | } /* else pattern char is above Latin1, can't possibly match the | |
6766 | non-UTF-8 target */ | |
b40a2c17 | 6767 | } |
5e4a1da1 | 6768 | else { |
59d32103 | 6769 | |
5e4a1da1 KW |
6770 | /* Here, the string must be utf8; pattern isn't, and <c> is |
6771 | * different in utf8 than not, so can't compare them directly. | |
6772 | * Outside the loop, find the two utf8 bytes that represent c, and | |
6773 | * then look for those in sequence in the utf8 string */ | |
59d32103 KW |
6774 | U8 high = UTF8_TWO_BYTE_HI(c); |
6775 | U8 low = UTF8_TWO_BYTE_LO(c); | |
59d32103 KW |
6776 | |
6777 | while (hardcount < max | |
6778 | && scan + 1 < loceol | |
6779 | && UCHARAT(scan) == high | |
6780 | && UCHARAT(scan + 1) == low) | |
6781 | { | |
6782 | scan += 2; | |
6783 | hardcount++; | |
6784 | } | |
6785 | } | |
6786 | break; | |
5e4a1da1 | 6787 | |
2f7f8cb1 KW |
6788 | case EXACTFA: |
6789 | utf8_flags = FOLDEQ_UTF8_NOMIX_ASCII; | |
6790 | goto do_exactf; | |
6791 | ||
d4e0b827 | 6792 | case EXACTFL: |
272d35c9 | 6793 | RXp_MATCH_TAINTED_on(prog); |
17580e7a KW |
6794 | utf8_flags = FOLDEQ_UTF8_LOCALE; |
6795 | goto do_exactf; | |
6796 | ||
d4e0b827 | 6797 | case EXACTF: |
62bf7766 KW |
6798 | utf8_flags = 0; |
6799 | goto do_exactf; | |
6800 | ||
3c760661 | 6801 | case EXACTFU_SS: |
fab2782b | 6802 | case EXACTFU_TRICKYFOLD: |
9a5a5549 | 6803 | case EXACTFU: |
984e6dd1 | 6804 | utf8_flags = is_utf8_pat ? FOLDEQ_S2_ALREADY_FOLDED : 0; |
59d32103 | 6805 | |
613a425d KW |
6806 | do_exactf: { |
6807 | int c1, c2; | |
6808 | U8 c1_utf8[UTF8_MAXBYTES+1], c2_utf8[UTF8_MAXBYTES+1]; | |
d4e0b827 | 6809 | |
984e6dd1 | 6810 | assert(STR_LEN(p) == is_utf8_pat ? UTF8SKIP(STRING(p)) : 1); |
613a425d | 6811 | |
984e6dd1 DM |
6812 | if (S_setup_EXACTISH_ST_c1_c2(aTHX_ p, &c1, c1_utf8, &c2, c2_utf8, |
6813 | is_utf8_pat)) | |
6814 | { | |
613a425d | 6815 | if (c1 == CHRTEST_VOID) { |
49b95fad | 6816 | /* Use full Unicode fold matching */ |
4063ade8 | 6817 | char *tmpeol = PL_regeol; |
984e6dd1 | 6818 | STRLEN pat_len = is_utf8_pat ? UTF8SKIP(STRING(p)) : 1; |
49b95fad KW |
6819 | while (hardcount < max |
6820 | && foldEQ_utf8_flags(scan, &tmpeol, 0, utf8_target, | |
6821 | STRING(p), NULL, pat_len, | |
984e6dd1 | 6822 | is_utf8_pat, utf8_flags)) |
49b95fad KW |
6823 | { |
6824 | scan = tmpeol; | |
4063ade8 | 6825 | tmpeol = PL_regeol; |
49b95fad KW |
6826 | hardcount++; |
6827 | } | |
613a425d KW |
6828 | } |
6829 | else if (utf8_target) { | |
6830 | if (c1 == c2) { | |
4063ade8 KW |
6831 | while (scan < loceol |
6832 | && hardcount < max | |
613a425d KW |
6833 | && memEQ(scan, c1_utf8, UTF8SKIP(scan))) |
6834 | { | |
6835 | scan += UTF8SKIP(scan); | |
6836 | hardcount++; | |
6837 | } | |
6838 | } | |
6839 | else { | |
4063ade8 KW |
6840 | while (scan < loceol |
6841 | && hardcount < max | |
613a425d KW |
6842 | && (memEQ(scan, c1_utf8, UTF8SKIP(scan)) |
6843 | || memEQ(scan, c2_utf8, UTF8SKIP(scan)))) | |
6844 | { | |
6845 | scan += UTF8SKIP(scan); | |
6846 | hardcount++; | |
6847 | } | |
6848 | } | |
6849 | } | |
6850 | else if (c1 == c2) { | |
6851 | while (scan < loceol && UCHARAT(scan) == c1) { | |
6852 | scan++; | |
6853 | } | |
6854 | } | |
6855 | else { | |
6856 | while (scan < loceol && | |
6857 | (UCHARAT(scan) == c1 || UCHARAT(scan) == c2)) | |
6858 | { | |
6859 | scan++; | |
6860 | } | |
6861 | } | |
634c83a2 | 6862 | } |
bbce6d69 | 6863 | break; |
613a425d | 6864 | } |
a0d0e21e | 6865 | case ANYOF: |
954a2af6 | 6866 | case ANYOF_WARN_SUPER: |
e0193e47 | 6867 | if (utf8_target) { |
4e8910e0 | 6868 | while (hardcount < max |
9a902117 | 6869 | && scan < loceol |
635cd5d4 | 6870 | && reginclass(prog, p, (U8*)scan, utf8_target)) |
4e8910e0 | 6871 | { |
9a902117 | 6872 | scan += UTF8SKIP(scan); |
ffc61ed2 JH |
6873 | hardcount++; |
6874 | } | |
6875 | } else { | |
32fc9b6a | 6876 | while (scan < loceol && REGINCLASS(prog, p, (U8*)scan)) |
ffc61ed2 JH |
6877 | scan++; |
6878 | } | |
a0d0e21e | 6879 | break; |
4063ade8 | 6880 | |
3018b823 | 6881 | /* The argument (FLAGS) to all the POSIX node types is the class number */ |
980866de | 6882 | |
3018b823 KW |
6883 | case NPOSIXL: |
6884 | to_complement = 1; | |
6885 | /* FALLTHROUGH */ | |
980866de | 6886 | |
3018b823 | 6887 | case POSIXL: |
272d35c9 | 6888 | RXp_MATCH_TAINTED_on(prog); |
3018b823 KW |
6889 | if (! utf8_target) { |
6890 | while (scan < loceol && to_complement ^ cBOOL(isFOO_lc(FLAGS(p), | |
6891 | *scan))) | |
a12cf05f | 6892 | { |
3018b823 KW |
6893 | scan++; |
6894 | } | |
6895 | } else { | |
6896 | while (hardcount < max && scan < loceol | |
6897 | && to_complement ^ cBOOL(isFOO_utf8_lc(FLAGS(p), | |
6898 | (U8 *) scan))) | |
6899 | { | |
6900 | scan += UTF8SKIP(scan); | |
ffc61ed2 JH |
6901 | hardcount++; |
6902 | } | |
a0ed51b3 LW |
6903 | } |
6904 | break; | |
0658cdde | 6905 | |
3018b823 KW |
6906 | case POSIXD: |
6907 | if (utf8_target) { | |
6908 | goto utf8_posix; | |
6909 | } | |
6910 | /* FALLTHROUGH */ | |
6911 | ||
0658cdde | 6912 | case POSIXA: |
4063ade8 KW |
6913 | if (utf8_target && scan + max < loceol) { |
6914 | ||
7aee35ff KW |
6915 | /* We didn't adjust <loceol> at the beginning of this routine |
6916 | * because is UTF-8, but it is actually ok to do so, since here, to | |
6917 | * match, 1 char == 1 byte. */ | |
4063ade8 KW |
6918 | loceol = scan + max; |
6919 | } | |
6920 | while (scan < loceol && _generic_isCC_A((U8) *scan, FLAGS(p))) { | |
0658cdde KW |
6921 | scan++; |
6922 | } | |
6923 | break; | |
980866de | 6924 | |
3018b823 KW |
6925 | case NPOSIXD: |
6926 | if (utf8_target) { | |
6927 | to_complement = 1; | |
6928 | goto utf8_posix; | |
6929 | } | |
6930 | /* FALL THROUGH */ | |
980866de | 6931 | |
3018b823 KW |
6932 | case NPOSIXA: |
6933 | if (! utf8_target) { | |
6934 | while (scan < loceol && ! _generic_isCC_A((U8) *scan, FLAGS(p))) { | |
a12cf05f KW |
6935 | scan++; |
6936 | } | |
4063ade8 | 6937 | } |
3018b823 | 6938 | else { |
980866de | 6939 | |
3018b823 KW |
6940 | /* The complement of something that matches only ASCII matches all |
6941 | * UTF-8 variant code points, plus everything in ASCII that isn't | |
6942 | * in the class. */ | |
bedac28b | 6943 | while (hardcount < max && scan < loceol |
3018b823 KW |
6944 | && (! UTF8_IS_INVARIANT(*scan) |
6945 | || ! _generic_isCC_A((U8) *scan, FLAGS(p)))) | |
a12cf05f | 6946 | { |
3018b823 | 6947 | scan += UTF8SKIP(scan); |
ffc61ed2 JH |
6948 | hardcount++; |
6949 | } | |
3018b823 KW |
6950 | } |
6951 | break; | |
980866de | 6952 | |
3018b823 KW |
6953 | case NPOSIXU: |
6954 | to_complement = 1; | |
6955 | /* FALLTHROUGH */ | |
6956 | ||
6957 | case POSIXU: | |
6958 | if (! utf8_target) { | |
6959 | while (scan < loceol && to_complement | |
6960 | ^ cBOOL(_generic_isCC((U8) *scan, FLAGS(p)))) | |
4063ade8 | 6961 | { |
3018b823 KW |
6962 | scan++; |
6963 | } | |
cfaf538b KW |
6964 | } |
6965 | else { | |
3018b823 KW |
6966 | utf8_posix: |
6967 | classnum = (_char_class_number) FLAGS(p); | |
6968 | if (classnum < _FIRST_NON_SWASH_CC) { | |
6969 | ||
6970 | /* Here, a swash is needed for above-Latin1 code points. | |
6971 | * Process as many Latin1 code points using the built-in rules. | |
6972 | * Go to another loop to finish processing upon encountering | |
6973 | * the first Latin1 code point. We could do that in this loop | |
6974 | * as well, but the other way saves having to test if the swash | |
6975 | * has been loaded every time through the loop: extra space to | |
6976 | * save a test. */ | |
6977 | while (hardcount < max && scan < loceol) { | |
6978 | if (UTF8_IS_INVARIANT(*scan)) { | |
6979 | if (! (to_complement ^ cBOOL(_generic_isCC((U8) *scan, | |
6980 | classnum)))) | |
6981 | { | |
6982 | break; | |
6983 | } | |
6984 | scan++; | |
6985 | } | |
6986 | else if (UTF8_IS_DOWNGRADEABLE_START(*scan)) { | |
6987 | if (! (to_complement | |
6988 | ^ cBOOL(_generic_isCC(TWO_BYTE_UTF8_TO_UNI(*scan, | |
6989 | *(scan + 1)), | |
6990 | classnum)))) | |
6991 | { | |
6992 | break; | |
6993 | } | |
6994 | scan += 2; | |
6995 | } | |
6996 | else { | |
6997 | goto found_above_latin1; | |
6998 | } | |
6999 | ||
7000 | hardcount++; | |
7001 | } | |
7002 | } | |
7003 | else { | |
7004 | /* For these character classes, the knowledge of how to handle | |
7005 | * every code point is compiled in to Perl via a macro. This | |
7006 | * code is written for making the loops as tight as possible. | |
7007 | * It could be refactored to save space instead */ | |
7008 | switch (classnum) { | |
7009 | case _CC_ENUM_SPACE: /* XXX would require separate code | |
7010 | if we revert the change of \v | |
7011 | matching this */ | |
7012 | /* FALL THROUGH */ | |
7013 | case _CC_ENUM_PSXSPC: | |
7014 | while (hardcount < max | |
7015 | && scan < loceol | |
7016 | && (to_complement ^ cBOOL(isSPACE_utf8(scan)))) | |
7017 | { | |
7018 | scan += UTF8SKIP(scan); | |
7019 | hardcount++; | |
7020 | } | |
7021 | break; | |
7022 | case _CC_ENUM_BLANK: | |
7023 | while (hardcount < max | |
7024 | && scan < loceol | |
7025 | && (to_complement ^ cBOOL(isBLANK_utf8(scan)))) | |
7026 | { | |
7027 | scan += UTF8SKIP(scan); | |
7028 | hardcount++; | |
7029 | } | |
7030 | break; | |
7031 | case _CC_ENUM_XDIGIT: | |
7032 | while (hardcount < max | |
7033 | && scan < loceol | |
7034 | && (to_complement ^ cBOOL(isXDIGIT_utf8(scan)))) | |
7035 | { | |
7036 | scan += UTF8SKIP(scan); | |
7037 | hardcount++; | |
7038 | } | |
7039 | break; | |
7040 | case _CC_ENUM_VERTSPACE: | |
7041 | while (hardcount < max | |
7042 | && scan < loceol | |
7043 | && (to_complement ^ cBOOL(isVERTWS_utf8(scan)))) | |
7044 | { | |
7045 | scan += UTF8SKIP(scan); | |
7046 | hardcount++; | |
7047 | } | |
7048 | break; | |
7049 | case _CC_ENUM_CNTRL: | |
7050 | while (hardcount < max | |
7051 | && scan < loceol | |
7052 | && (to_complement ^ cBOOL(isCNTRL_utf8(scan)))) | |
7053 | { | |
7054 | scan += UTF8SKIP(scan); | |
7055 | hardcount++; | |
7056 | } | |
7057 | break; | |
7058 | default: | |
7059 | Perl_croak(aTHX_ "panic: regrepeat() node %d='%s' has an unexpected character class '%d'", OP(p), PL_reg_name[OP(p)], classnum); | |
7060 | } | |
7061 | } | |
a0ed51b3 | 7062 | } |
3018b823 | 7063 | break; |
4063ade8 | 7064 | |
3018b823 KW |
7065 | found_above_latin1: /* Continuation of POSIXU and NPOSIXU */ |
7066 | ||
7067 | /* Load the swash if not already present */ | |
7068 | if (! PL_utf8_swash_ptrs[classnum]) { | |
7069 | U8 flags = _CORE_SWASH_INIT_ACCEPT_INVLIST; | |
7070 | PL_utf8_swash_ptrs[classnum] = _core_swash_init( | |
7071 | "utf8", swash_property_names[classnum], | |
7072 | &PL_sv_undef, 1, 0, NULL, &flags); | |
4063ade8 | 7073 | } |
3018b823 KW |
7074 | |
7075 | while (hardcount < max && scan < loceol | |
7076 | && to_complement ^ cBOOL(_generic_utf8( | |
7077 | classnum, | |
7078 | scan, | |
7079 | swash_fetch(PL_utf8_swash_ptrs[classnum], | |
7080 | (U8 *) scan, | |
7081 | TRUE)))) | |
7082 | { | |
7083 | scan += UTF8SKIP(scan); | |
7084 | hardcount++; | |
7085 | } | |
7086 | break; | |
7087 | ||
e1d1eefb | 7088 | case LNBREAK: |
e64f369d KW |
7089 | if (utf8_target) { |
7090 | while (hardcount < max && scan < loceol && | |
7091 | (c=is_LNBREAK_utf8_safe(scan, loceol))) { | |
7092 | scan += c; | |
7093 | hardcount++; | |
7094 | } | |
7095 | } else { | |
7096 | /* LNBREAK can match one or two latin chars, which is ok, but we | |
7097 | * have to use hardcount in this situation, and throw away the | |
7098 | * adjustment to <loceol> done before the switch statement */ | |
7099 | loceol = PL_regeol; | |
7100 | while (scan < loceol && (c=is_LNBREAK_latin1_safe(scan, loceol))) { | |
7101 | scan+=c; | |
7102 | hardcount++; | |
7103 | } | |
7104 | } | |
7105 | break; | |
e1d1eefb | 7106 | |
584b1f02 KW |
7107 | case BOUND: |
7108 | case BOUNDA: | |
7109 | case BOUNDL: | |
7110 | case BOUNDU: | |
7111 | case EOS: | |
7112 | case GPOS: | |
7113 | case KEEPS: | |
7114 | case NBOUND: | |
7115 | case NBOUNDA: | |
7116 | case NBOUNDL: | |
7117 | case NBOUNDU: | |
7118 | case OPFAIL: | |
7119 | case SBOL: | |
7120 | case SEOL: | |
7121 | /* These are all 0 width, so match right here or not at all. */ | |
7122 | break; | |
7123 | ||
7124 | default: | |
7125 | Perl_croak(aTHX_ "panic: regrepeat() called with unrecognized node type %d='%s'", OP(p), PL_reg_name[OP(p)]); | |
7126 | assert(0); /* NOTREACHED */ | |
7127 | ||
a0d0e21e | 7128 | } |
a687059c | 7129 | |
a0ed51b3 LW |
7130 | if (hardcount) |
7131 | c = hardcount; | |
7132 | else | |
f73aaa43 DM |
7133 | c = scan - *startposp; |
7134 | *startposp = scan; | |
a687059c | 7135 | |
a3621e74 | 7136 | DEBUG_r({ |
e68ec53f | 7137 | GET_RE_DEBUG_FLAGS_DECL; |
be8e71aa | 7138 | DEBUG_EXECUTE_r({ |
e68ec53f YO |
7139 | SV * const prop = sv_newmortal(); |
7140 | regprop(prog, prop, p); | |
7141 | PerlIO_printf(Perl_debug_log, | |
be8e71aa | 7142 | "%*s %s can match %"IVdf" times out of %"IVdf"...\n", |
e2e6a0f1 | 7143 | REPORT_CODE_OFF + depth*2, "", SvPVX_const(prop),(IV)c,(IV)max); |
a3621e74 | 7144 | }); |
be8e71aa | 7145 | }); |
9041c2e3 | 7146 | |
a0d0e21e | 7147 | return(c); |
a687059c LW |
7148 | } |
7149 | ||
c277df42 | 7150 | |
be8e71aa | 7151 | #if !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION) |
c277df42 | 7152 | /* |
6c6525b8 | 7153 | - regclass_swash - prepare the utf8 swash. Wraps the shared core version to |
e0193e47 KW |
7154 | create a copy so that changes the caller makes won't change the shared one. |
7155 | If <altsvp> is non-null, will return NULL in it, for back-compat. | |
6c6525b8 | 7156 | */ |
ffc61ed2 | 7157 | SV * |
5aaab254 | 7158 | Perl_regclass_swash(pTHX_ const regexp *prog, const regnode* node, bool doinit, SV** listsvp, SV **altsvp) |
ffc61ed2 | 7159 | { |
6c6525b8 | 7160 | PERL_ARGS_ASSERT_REGCLASS_SWASH; |
e0193e47 KW |
7161 | |
7162 | if (altsvp) { | |
7163 | *altsvp = NULL; | |
7164 | } | |
7165 | ||
7166 | return newSVsv(core_regclass_swash(prog, node, doinit, listsvp)); | |
6c6525b8 KW |
7167 | } |
7168 | #endif | |
7169 | ||
7170 | STATIC SV * | |
5aaab254 | 7171 | S_core_regclass_swash(pTHX_ const regexp *prog, const regnode* node, bool doinit, SV** listsvp) |
6c6525b8 | 7172 | { |
8c9eb58f KW |
7173 | /* Returns the swash for the input 'node' in the regex 'prog'. |
7174 | * If <doinit> is true, will attempt to create the swash if not already | |
7175 | * done. | |
7176 | * If <listsvp> is non-null, will return the swash initialization string in | |
7177 | * it. | |
8c9eb58f KW |
7178 | * Tied intimately to how regcomp.c sets up the data structure */ |
7179 | ||
97aff369 | 7180 | dVAR; |
9e55ce06 JH |
7181 | SV *sw = NULL; |
7182 | SV *si = NULL; | |
7a6c6baa KW |
7183 | SV* invlist = NULL; |
7184 | ||
f8fc2ecf YO |
7185 | RXi_GET_DECL(prog,progi); |
7186 | const struct reg_data * const data = prog ? progi->data : NULL; | |
ffc61ed2 | 7187 | |
6c6525b8 | 7188 | PERL_ARGS_ASSERT_CORE_REGCLASS_SWASH; |
7918f24d | 7189 | |
ccb2541c KW |
7190 | assert(ANYOF_NONBITMAP(node)); |
7191 | ||
4f639d21 | 7192 | if (data && data->count) { |
a3b680e6 | 7193 | const U32 n = ARG(node); |
ffc61ed2 | 7194 | |
4f639d21 | 7195 | if (data->what[n] == 's') { |
ad64d0ec NC |
7196 | SV * const rv = MUTABLE_SV(data->data[n]); |
7197 | AV * const av = MUTABLE_AV(SvRV(rv)); | |
2d03de9c | 7198 | SV **const ary = AvARRAY(av); |
87367d5f | 7199 | U8 swash_init_flags = _CORE_SWASH_INIT_ACCEPT_INVLIST; |
9041c2e3 | 7200 | |
8c9eb58f | 7201 | si = *ary; /* ary[0] = the string to initialize the swash with */ |
b11f357e | 7202 | |
88675427 KW |
7203 | /* Elements 2 and 3 are either both present or both absent. [2] is |
7204 | * any inversion list generated at compile time; [3] indicates if | |
7a6c6baa | 7205 | * that inversion list has any user-defined properties in it. */ |
88675427 KW |
7206 | if (av_len(av) >= 2) { |
7207 | invlist = ary[2]; | |
7208 | if (SvUV(ary[3])) { | |
83199d38 KW |
7209 | swash_init_flags |= _CORE_SWASH_INIT_USER_DEFINED_PROPERTY; |
7210 | } | |
7a6c6baa KW |
7211 | } |
7212 | else { | |
7213 | invlist = NULL; | |
7a6c6baa KW |
7214 | } |
7215 | ||
8c9eb58f KW |
7216 | /* Element [1] is reserved for the set-up swash. If already there, |
7217 | * return it; if not, create it and store it there */ | |
f192cf32 KW |
7218 | if (SvROK(ary[1])) { |
7219 | sw = ary[1]; | |
7220 | } | |
ffc61ed2 | 7221 | else if (si && doinit) { |
7a6c6baa KW |
7222 | |
7223 | sw = _core_swash_init("utf8", /* the utf8 package */ | |
7224 | "", /* nameless */ | |
7225 | si, | |
7226 | 1, /* binary */ | |
7227 | 0, /* not from tr/// */ | |
7a6c6baa | 7228 | invlist, |
83199d38 | 7229 | &swash_init_flags); |
ffc61ed2 JH |
7230 | (void)av_store(av, 1, sw); |
7231 | } | |
7232 | } | |
7233 | } | |
7234 | ||
7a6c6baa KW |
7235 | if (listsvp) { |
7236 | SV* matches_string = newSVpvn("", 0); | |
7a6c6baa KW |
7237 | |
7238 | /* Use the swash, if any, which has to have incorporated into it all | |
7239 | * possibilities */ | |
872dd7e0 KW |
7240 | if ((! sw || (invlist = _get_swash_invlist(sw)) == NULL) |
7241 | && (si && si != &PL_sv_undef)) | |
7242 | { | |
7a6c6baa | 7243 | |
872dd7e0 | 7244 | /* If no swash, use the input initialization string, if available */ |
7a6c6baa KW |
7245 | sv_catsv(matches_string, si); |
7246 | } | |
7247 | ||
7248 | /* Add the inversion list to whatever we have. This may have come from | |
7249 | * the swash, or from an input parameter */ | |
7250 | if (invlist) { | |
7251 | sv_catsv(matches_string, _invlist_contents(invlist)); | |
7252 | } | |
7253 | *listsvp = matches_string; | |
7254 | } | |
7255 | ||
ffc61ed2 JH |
7256 | return sw; |
7257 | } | |
7258 | ||
7259 | /* | |
ba7b4546 | 7260 | - reginclass - determine if a character falls into a character class |
832705d4 | 7261 | |
6698fab5 KW |
7262 | n is the ANYOF regnode |
7263 | p is the target string | |
6698fab5 | 7264 | utf8_target tells whether p is in UTF-8. |
832705d4 | 7265 | |
635cd5d4 | 7266 | Returns true if matched; false otherwise. |
eba1359e | 7267 | |
d5788240 KW |
7268 | Note that this can be a synthetic start class, a combination of various |
7269 | nodes, so things you think might be mutually exclusive, such as locale, | |
7270 | aren't. It can match both locale and non-locale | |
7271 | ||
bbce6d69 | 7272 | */ |
7273 | ||
76e3520e | 7274 | STATIC bool |
272d35c9 | 7275 | S_reginclass(pTHX_ regexp * const prog, const regnode * const n, const U8* const p, const bool utf8_target) |
bbce6d69 | 7276 | { |
27da23d5 | 7277 | dVAR; |
a3b680e6 | 7278 | const char flags = ANYOF_FLAGS(n); |
bbce6d69 | 7279 | bool match = FALSE; |
cc07378b | 7280 | UV c = *p; |
1aa99e6b | 7281 | |
7918f24d NC |
7282 | PERL_ARGS_ASSERT_REGINCLASS; |
7283 | ||
afd2eb18 KW |
7284 | /* If c is not already the code point, get it. Note that |
7285 | * UTF8_IS_INVARIANT() works even if not in UTF-8 */ | |
7286 | if (! UTF8_IS_INVARIANT(c) && utf8_target) { | |
635cd5d4 | 7287 | STRLEN c_len = 0; |
f7ab54c6 | 7288 | c = utf8n_to_uvchr(p, UTF8_MAXBYTES, &c_len, |
6182169b KW |
7289 | (UTF8_ALLOW_DEFAULT & UTF8_ALLOW_ANYUV) |
7290 | | UTF8_ALLOW_FFFF | UTF8_CHECK_ONLY); | |
7291 | /* see [perl #37836] for UTF8_ALLOW_ANYUV; [perl #38293] for | |
7292 | * UTF8_ALLOW_FFFF */ | |
f7ab54c6 | 7293 | if (c_len == (STRLEN)-1) |
e8a70c6f | 7294 | Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)"); |
19f67299 | 7295 | } |
4b3cda86 | 7296 | |
7cdde544 KW |
7297 | /* If this character is potentially in the bitmap, check it */ |
7298 | if (c < 256) { | |
ffc61ed2 JH |
7299 | if (ANYOF_BITMAP_TEST(n, c)) |
7300 | match = TRUE; | |
11454c59 KW |
7301 | else if (flags & ANYOF_NON_UTF8_LATIN1_ALL |
7302 | && ! utf8_target | |
7303 | && ! isASCII(c)) | |
7304 | { | |
7305 | match = TRUE; | |
7306 | } | |
78969a98 | 7307 | else if (flags & ANYOF_LOCALE) { |
272d35c9 | 7308 | RXp_MATCH_TAINTED_on(prog); |
78969a98 | 7309 | |
538b546e | 7310 | if ((flags & ANYOF_LOC_FOLD) |
78969a98 KW |
7311 | && ANYOF_BITMAP_TEST(n, PL_fold_locale[c])) |
7312 | { | |
ffc61ed2 | 7313 | match = TRUE; |
78969a98 | 7314 | } |
31c7f561 KW |
7315 | else if (ANYOF_CLASS_TEST_ANY_SET(n)) { |
7316 | ||
7317 | /* The data structure is arranged so bits 0, 2, 4, ... are set | |
7318 | * if the class includes the Posix character class given by | |
7319 | * bit/2; and 1, 3, 5, ... are set if the class includes the | |
7320 | * complemented Posix class given by int(bit/2). So we loop | |
7321 | * through the bits, each time changing whether we complement | |
7322 | * the result or not. Suppose for the sake of illustration | |
7323 | * that bits 0-3 mean respectively, \w, \W, \s, \S. If bit 0 | |
7324 | * is set, it means there is a match for this ANYOF node if the | |
7325 | * character is in the class given by the expression (0 / 2 = 0 | |
7326 | * = \w). If it is in that class, isFOO_lc() will return 1, | |
7327 | * and since 'to_complement' is 0, the result will stay TRUE, | |
7328 | * and we exit the loop. Suppose instead that bit 0 is 0, but | |
7329 | * bit 1 is 1. That means there is a match if the character | |
7330 | * matches \W. We won't bother to call isFOO_lc() on bit 0, | |
7331 | * but will on bit 1. On the second iteration 'to_complement' | |
7332 | * will be 1, so the exclusive or will reverse things, so we | |
7333 | * are testing for \W. On the third iteration, 'to_complement' | |
7334 | * will be 0, and we would be testing for \s; the fourth | |
b0d691b2 KW |
7335 | * iteration would test for \S, etc. |
7336 | * | |
7337 | * Note that this code assumes that all the classes are closed | |
7338 | * under folding. For example, if a character matches \w, then | |
7339 | * its fold does too; and vice versa. This should be true for | |
7340 | * any well-behaved locale for all the currently defined Posix | |
7341 | * classes, except for :lower: and :upper:, which are handled | |
7342 | * by the pseudo-class :cased: which matches if either of the | |
7343 | * other two does. To get rid of this assumption, an outer | |
7344 | * loop could be used below to iterate over both the source | |
7345 | * character, and its fold (if different) */ | |
31c7f561 KW |
7346 | |
7347 | int count = 0; | |
7348 | int to_complement = 0; | |
7349 | while (count < ANYOF_MAX) { | |
7350 | if (ANYOF_CLASS_TEST(n, count) | |
7351 | && to_complement ^ cBOOL(isFOO_lc(count/2, (U8) c))) | |
7352 | { | |
7353 | match = TRUE; | |
7354 | break; | |
7355 | } | |
7356 | count++; | |
7357 | to_complement ^= 1; | |
7358 | } | |
ffc61ed2 | 7359 | } |
a0ed51b3 | 7360 | } |
a0ed51b3 LW |
7361 | } |
7362 | ||
7cdde544 | 7363 | /* If the bitmap didn't (or couldn't) match, and something outside the |
1f327b5e | 7364 | * bitmap could match, try that. Locale nodes specify completely the |
de87c4fe | 7365 | * behavior of code points in the bit map (otherwise, a utf8 target would |
c613755a | 7366 | * cause them to be treated as Unicode and not locale), except in |
de87c4fe | 7367 | * the very unlikely event when this node is a synthetic start class, which |
c613755a KW |
7368 | * could be a combination of locale and non-locale nodes. So allow locale |
7369 | * to match for the synthetic start class, which will give a false | |
7370 | * positive that will be resolved when the match is done again as not part | |
7371 | * of the synthetic start class */ | |
ef87b810 | 7372 | if (!match) { |
10ee90d2 KW |
7373 | if (utf8_target && (flags & ANYOF_UNICODE_ALL) && c >= 256) { |
7374 | match = TRUE; /* Everything above 255 matches */ | |
e051a21d | 7375 | } |
6f8d7d0d KW |
7376 | else if (ANYOF_NONBITMAP(n) |
7377 | && ((flags & ANYOF_NONBITMAP_NON_UTF8) | |
7378 | || (utf8_target | |
7379 | && (c >=256 | |
7380 | || (! (flags & ANYOF_LOCALE)) | |
9aa1e39f | 7381 | || OP(n) == ANYOF_SYNTHETIC)))) |
ef87b810 | 7382 | { |
e0193e47 | 7383 | SV * const sw = core_regclass_swash(prog, n, TRUE, 0); |
7cdde544 KW |
7384 | if (sw) { |
7385 | U8 * utf8_p; | |
7386 | if (utf8_target) { | |
7387 | utf8_p = (U8 *) p; | |
e0193e47 KW |
7388 | } else { /* Convert to utf8 */ |
7389 | STRLEN len = 1; | |
7cdde544 KW |
7390 | utf8_p = bytes_to_utf8(p, &len); |
7391 | } | |
f56b6394 | 7392 | |
e0193e47 | 7393 | if (swash_fetch(sw, utf8_p, TRUE)) { |
7cdde544 | 7394 | match = TRUE; |
e0193e47 | 7395 | } |
7cdde544 KW |
7396 | |
7397 | /* If we allocated a string above, free it */ | |
7398 | if (! utf8_target) Safefree(utf8_p); | |
7399 | } | |
7400 | } | |
5073ffbd KW |
7401 | |
7402 | if (UNICODE_IS_SUPER(c) | |
954a2af6 | 7403 | && OP(n) == ANYOF_WARN_SUPER |
5073ffbd KW |
7404 | && ckWARN_d(WARN_NON_UNICODE)) |
7405 | { | |
7406 | Perl_warner(aTHX_ packWARN(WARN_NON_UNICODE), | |
7407 | "Code point 0x%04"UVXf" is not Unicode, all \\p{} matches fail; all \\P{} matches succeed", c); | |
7408 | } | |
7cdde544 KW |
7409 | } |
7410 | ||
f0fdc1c9 KW |
7411 | /* The xor complements the return if to invert: 1^1 = 0, 1^0 = 1 */ |
7412 | return cBOOL(flags & ANYOF_INVERT) ^ match; | |
a0ed51b3 | 7413 | } |
161b471a | 7414 | |
dfe13c55 | 7415 | STATIC U8 * |
0ce71af7 | 7416 | S_reghop3(U8 *s, I32 off, const U8* lim) |
9041c2e3 | 7417 | { |
6af86488 KW |
7418 | /* return the position 'off' UTF-8 characters away from 's', forward if |
7419 | * 'off' >= 0, backwards if negative. But don't go outside of position | |
7420 | * 'lim', which better be < s if off < 0 */ | |
7421 | ||
97aff369 | 7422 | dVAR; |
7918f24d NC |
7423 | |
7424 | PERL_ARGS_ASSERT_REGHOP3; | |
7425 | ||
a0ed51b3 | 7426 | if (off >= 0) { |
1aa99e6b | 7427 | while (off-- && s < lim) { |
ffc61ed2 | 7428 | /* XXX could check well-formedness here */ |
a0ed51b3 | 7429 | s += UTF8SKIP(s); |
ffc61ed2 | 7430 | } |
a0ed51b3 LW |
7431 | } |
7432 | else { | |
1de06328 YO |
7433 | while (off++ && s > lim) { |
7434 | s--; | |
7435 | if (UTF8_IS_CONTINUED(*s)) { | |
7436 | while (s > lim && UTF8_IS_CONTINUATION(*s)) | |
7437 | s--; | |
a0ed51b3 | 7438 | } |
1de06328 | 7439 | /* XXX could check well-formedness here */ |
a0ed51b3 LW |
7440 | } |
7441 | } | |
7442 | return s; | |
7443 | } | |
161b471a | 7444 | |
f9f4320a YO |
7445 | #ifdef XXX_dmq |
7446 | /* there are a bunch of places where we use two reghop3's that should | |
7447 | be replaced with this routine. but since thats not done yet | |
7448 | we ifdef it out - dmq | |
7449 | */ | |
dfe13c55 | 7450 | STATIC U8 * |
1de06328 YO |
7451 | S_reghop4(U8 *s, I32 off, const U8* llim, const U8* rlim) |
7452 | { | |
7453 | dVAR; | |
7918f24d NC |
7454 | |
7455 | PERL_ARGS_ASSERT_REGHOP4; | |
7456 | ||
1de06328 YO |
7457 | if (off >= 0) { |
7458 | while (off-- && s < rlim) { | |
7459 | /* XXX could check well-formedness here */ | |
7460 | s += UTF8SKIP(s); | |
7461 | } | |
7462 | } | |
7463 | else { | |
7464 | while (off++ && s > llim) { | |
7465 | s--; | |
7466 | if (UTF8_IS_CONTINUED(*s)) { | |
7467 | while (s > llim && UTF8_IS_CONTINUATION(*s)) | |
7468 | s--; | |
7469 | } | |
7470 | /* XXX could check well-formedness here */ | |
7471 | } | |
7472 | } | |
7473 | return s; | |
7474 | } | |
f9f4320a | 7475 | #endif |
1de06328 YO |
7476 | |
7477 | STATIC U8 * | |
0ce71af7 | 7478 | S_reghopmaybe3(U8* s, I32 off, const U8* lim) |
a0ed51b3 | 7479 | { |
97aff369 | 7480 | dVAR; |
7918f24d NC |
7481 | |
7482 | PERL_ARGS_ASSERT_REGHOPMAYBE3; | |
7483 | ||
a0ed51b3 | 7484 | if (off >= 0) { |
1aa99e6b | 7485 | while (off-- && s < lim) { |
ffc61ed2 | 7486 | /* XXX could check well-formedness here */ |
a0ed51b3 | 7487 | s += UTF8SKIP(s); |
ffc61ed2 | 7488 | } |
a0ed51b3 | 7489 | if (off >= 0) |
3dab1dad | 7490 | return NULL; |
a0ed51b3 LW |
7491 | } |
7492 | else { | |
1de06328 YO |
7493 | while (off++ && s > lim) { |
7494 | s--; | |
7495 | if (UTF8_IS_CONTINUED(*s)) { | |
7496 | while (s > lim && UTF8_IS_CONTINUATION(*s)) | |
7497 | s--; | |
a0ed51b3 | 7498 | } |
1de06328 | 7499 | /* XXX could check well-formedness here */ |
a0ed51b3 LW |
7500 | } |
7501 | if (off <= 0) | |
3dab1dad | 7502 | return NULL; |
a0ed51b3 LW |
7503 | } |
7504 | return s; | |
7505 | } | |
51371543 | 7506 | |
51371543 | 7507 | static void |
acfe0abc | 7508 | restore_pos(pTHX_ void *arg) |
51371543 | 7509 | { |
97aff369 | 7510 | dVAR; |
097eb12c | 7511 | regexp * const rex = (regexp *)arg; |
ed301438 | 7512 | if (PL_reg_state.re_state_eval_setup_done) { |
51371543 | 7513 | if (PL_reg_oldsaved) { |
4f639d21 DM |
7514 | rex->subbeg = PL_reg_oldsaved; |
7515 | rex->sublen = PL_reg_oldsavedlen; | |
6502e081 DM |
7516 | rex->suboffset = PL_reg_oldsavedoffset; |
7517 | rex->subcoffset = PL_reg_oldsavedcoffset; | |
db2c6cb3 | 7518 | #ifdef PERL_ANY_COW |
4f639d21 | 7519 | rex->saved_copy = PL_nrs; |
ed252734 | 7520 | #endif |
07bc277f | 7521 | RXp_MATCH_COPIED_on(rex); |
51371543 GS |
7522 | } |
7523 | PL_reg_magic->mg_len = PL_reg_oldpos; | |
ed301438 | 7524 | PL_reg_state.re_state_eval_setup_done = FALSE; |
51371543 GS |
7525 | PL_curpm = PL_reg_oldcurpm; |
7526 | } | |
7527 | } | |
33b8afdf JH |
7528 | |
7529 | STATIC void | |
5aaab254 | 7530 | S_to_utf8_substr(pTHX_ regexp *prog) |
33b8afdf | 7531 | { |
7e0d5ad7 KW |
7532 | /* Converts substr fields in prog from bytes to UTF-8, calling fbm_compile |
7533 | * on the converted value */ | |
7534 | ||
a1cac82e | 7535 | int i = 1; |
7918f24d NC |
7536 | |
7537 | PERL_ARGS_ASSERT_TO_UTF8_SUBSTR; | |
7538 | ||
a1cac82e NC |
7539 | do { |
7540 | if (prog->substrs->data[i].substr | |
7541 | && !prog->substrs->data[i].utf8_substr) { | |
7542 | SV* const sv = newSVsv(prog->substrs->data[i].substr); | |
7543 | prog->substrs->data[i].utf8_substr = sv; | |
7544 | sv_utf8_upgrade(sv); | |
610460f9 | 7545 | if (SvVALID(prog->substrs->data[i].substr)) { |
cffe132d | 7546 | if (SvTAIL(prog->substrs->data[i].substr)) { |
610460f9 NC |
7547 | /* Trim the trailing \n that fbm_compile added last |
7548 | time. */ | |
7549 | SvCUR_set(sv, SvCUR(sv) - 1); | |
7550 | /* Whilst this makes the SV technically "invalid" (as its | |
7551 | buffer is no longer followed by "\0") when fbm_compile() | |
7552 | adds the "\n" back, a "\0" is restored. */ | |
cffe132d NC |
7553 | fbm_compile(sv, FBMcf_TAIL); |
7554 | } else | |
7555 | fbm_compile(sv, 0); | |
610460f9 | 7556 | } |
a1cac82e NC |
7557 | if (prog->substrs->data[i].substr == prog->check_substr) |
7558 | prog->check_utf8 = sv; | |
7559 | } | |
7560 | } while (i--); | |
33b8afdf JH |
7561 | } |
7562 | ||
7e0d5ad7 | 7563 | STATIC bool |
5aaab254 | 7564 | S_to_byte_substr(pTHX_ regexp *prog) |
33b8afdf | 7565 | { |
7e0d5ad7 KW |
7566 | /* Converts substr fields in prog from UTF-8 to bytes, calling fbm_compile |
7567 | * on the converted value; returns FALSE if can't be converted. */ | |
7568 | ||
97aff369 | 7569 | dVAR; |
a1cac82e | 7570 | int i = 1; |
7918f24d NC |
7571 | |
7572 | PERL_ARGS_ASSERT_TO_BYTE_SUBSTR; | |
7573 | ||
a1cac82e NC |
7574 | do { |
7575 | if (prog->substrs->data[i].utf8_substr | |
7576 | && !prog->substrs->data[i].substr) { | |
7577 | SV* sv = newSVsv(prog->substrs->data[i].utf8_substr); | |
7e0d5ad7 KW |
7578 | if (! sv_utf8_downgrade(sv, TRUE)) { |
7579 | return FALSE; | |
7580 | } | |
5400f398 KW |
7581 | if (SvVALID(prog->substrs->data[i].utf8_substr)) { |
7582 | if (SvTAIL(prog->substrs->data[i].utf8_substr)) { | |
7583 | /* Trim the trailing \n that fbm_compile added last | |
7584 | time. */ | |
7585 | SvCUR_set(sv, SvCUR(sv) - 1); | |
7586 | fbm_compile(sv, FBMcf_TAIL); | |
7587 | } else | |
7588 | fbm_compile(sv, 0); | |
7589 | } | |
a1cac82e NC |
7590 | prog->substrs->data[i].substr = sv; |
7591 | if (prog->substrs->data[i].utf8_substr == prog->check_utf8) | |
7592 | prog->check_substr = sv; | |
33b8afdf | 7593 | } |
a1cac82e | 7594 | } while (i--); |
7e0d5ad7 KW |
7595 | |
7596 | return TRUE; | |
33b8afdf | 7597 | } |
66610fdd RGS |
7598 | |
7599 | /* | |
7600 | * Local variables: | |
7601 | * c-indentation-style: bsd | |
7602 | * c-basic-offset: 4 | |
14d04a33 | 7603 | * indent-tabs-mode: nil |
66610fdd RGS |
7604 | * End: |
7605 | * | |
14d04a33 | 7606 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 7607 | */ |