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 | |
a687059c | 40 | /* |
e50aee73 | 41 | * pregcomp and pregexec -- regsub and regerror are not used in perl |
a687059c LW |
42 | * |
43 | * Copyright (c) 1986 by University of Toronto. | |
44 | * Written by Henry Spencer. Not derived from licensed software. | |
45 | * | |
46 | * Permission is granted to anyone to use this software for any | |
47 | * purpose on any computer system, and to redistribute it freely, | |
48 | * subject to the following restrictions: | |
49 | * | |
50 | * 1. The author is not responsible for the consequences of use of | |
51 | * this software, no matter how awful, even if they arise | |
52 | * from defects in it. | |
53 | * | |
54 | * 2. The origin of this software must not be misrepresented, either | |
55 | * by explicit claim or by omission. | |
56 | * | |
57 | * 3. Altered versions must be plainly marked as such, and must not | |
58 | * be misrepresented as being the original software. | |
59 | * | |
60 | **** Alterations to Henry's code are... | |
61 | **** | |
4bb101f2 | 62 | **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
1129b882 NC |
63 | **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
64 | **** by Larry Wall and others | |
a687059c | 65 | **** |
9ef589d8 LW |
66 | **** You may distribute under the terms of either the GNU General Public |
67 | **** License or the Artistic License, as specified in the README file. | |
a687059c LW |
68 | * |
69 | * Beware that some of this code is subtly aware of the way operator | |
70 | * precedence is structured in regular expressions. Serious changes in | |
71 | * regular-expression syntax might require a total rethink. | |
72 | */ | |
73 | #include "EXTERN.h" | |
864dbfa3 | 74 | #define PERL_IN_REGEXEC_C |
a687059c | 75 | #include "perl.h" |
0f5d15d6 | 76 | |
54df2634 NC |
77 | #ifdef PERL_IN_XSUB_RE |
78 | # include "re_comp.h" | |
79 | #else | |
80 | # include "regcomp.h" | |
81 | #endif | |
a687059c | 82 | |
81e983c1 | 83 | #include "inline_invlist.c" |
61dad979 | 84 | #include "utf8_strings.h" |
81e983c1 | 85 | |
ef07e810 | 86 | #define RF_tainted 1 /* tainted information used? e.g. locale */ |
c277df42 | 87 | #define RF_warned 2 /* warned about big count? */ |
faec1544 | 88 | |
ab3bbdeb | 89 | #define RF_utf8 8 /* Pattern contains multibyte chars? */ |
a0ed51b3 | 90 | |
f2ed9b32 | 91 | #define UTF_PATTERN ((PL_reg_flags & RF_utf8) != 0) |
ce862d02 | 92 | |
a687059c LW |
93 | #ifndef STATIC |
94 | #define STATIC static | |
95 | #endif | |
96 | ||
7e2509c1 KW |
97 | /* Valid for non-utf8 strings, non-ANYOFV nodes only: avoids the reginclass |
98 | * call if there are no complications: i.e., if everything matchable is | |
99 | * straight forward in the bitmap */ | |
af364d03 KW |
100 | #define REGINCLASS(prog,p,c) (ANYOF_FLAGS(p) ? reginclass(prog,p,c,0,0) \ |
101 | : ANYOF_BITMAP_TEST(p,*(c))) | |
7d3e948e | 102 | |
c277df42 IZ |
103 | /* |
104 | * Forwards. | |
105 | */ | |
106 | ||
f2ed9b32 | 107 | #define CHR_SVLEN(sv) (utf8_target ? sv_len_utf8(sv) : SvCUR(sv)) |
53c4c00c | 108 | #define CHR_DIST(a,b) (PL_reg_match_utf8 ? utf8_distance(a,b) : a - b) |
a0ed51b3 | 109 | |
3dab1dad YO |
110 | #define HOPc(pos,off) \ |
111 | (char *)(PL_reg_match_utf8 \ | |
52657f30 | 112 | ? reghop3((U8*)pos, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)) \ |
3dab1dad YO |
113 | : (U8*)(pos + off)) |
114 | #define HOPBACKc(pos, off) \ | |
07be1b83 YO |
115 | (char*)(PL_reg_match_utf8\ |
116 | ? reghopmaybe3((U8*)pos, -off, (U8*)PL_bostr) \ | |
117 | : (pos - off >= PL_bostr) \ | |
8e11feef | 118 | ? (U8*)pos - off \ |
3dab1dad | 119 | : NULL) |
efb30f32 | 120 | |
e7409c1b | 121 | #define HOP3(pos,off,lim) (PL_reg_match_utf8 ? reghop3((U8*)(pos), off, (U8*)(lim)) : (U8*)(pos + off)) |
1aa99e6b | 122 | #define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim)) |
1aa99e6b | 123 | |
20d0b1e9 | 124 | /* these are unrolled below in the CCC_TRY_XXX defined */ |
61dad979 | 125 | #define LOAD_UTF8_CHARCLASS(class,str) STMT_START { \ |
9c4fdda1 | 126 | if (!CAT2(PL_utf8_,class)) { \ |
cf54f63a | 127 | bool ok; \ |
9c4fdda1 | 128 | ENTER; save_re_context(); \ |
cf54f63a JL |
129 | ok=CAT2(is_utf8_,class)((const U8*)str); \ |
130 | PERL_UNUSED_VAR(ok); \ | |
131 | assert(ok); assert(CAT2(PL_utf8_,class)); LEAVE; } } STMT_END | |
37e2e78e KW |
132 | /* Doesn't do an assert to verify that is correct */ |
133 | #define LOAD_UTF8_CHARCLASS_NO_CHECK(class) STMT_START { \ | |
9c4fdda1 | 134 | if (!CAT2(PL_utf8_,class)) { \ |
9d63fa07 | 135 | bool throw_away PERL_UNUSED_DECL; \ |
9c4fdda1 RB |
136 | ENTER; save_re_context(); \ |
137 | throw_away = CAT2(is_utf8_,class)((const U8*)" "); \ | |
138 | LEAVE; } } STMT_END | |
37e2e78e | 139 | |
1a4fad37 AL |
140 | #define LOAD_UTF8_CHARCLASS_ALNUM() LOAD_UTF8_CHARCLASS(alnum,"a") |
141 | #define LOAD_UTF8_CHARCLASS_DIGIT() LOAD_UTF8_CHARCLASS(digit,"0") | |
142 | #define LOAD_UTF8_CHARCLASS_SPACE() LOAD_UTF8_CHARCLASS(space," ") | |
51371543 | 143 | |
37e2e78e | 144 | #define LOAD_UTF8_CHARCLASS_GCB() /* Grapheme cluster boundaries */ \ |
61dad979 KW |
145 | /* No asserts are done for some of these, in case called on a */ \ |
146 | /* Unicode version in which they map to nothing */ \ | |
27d4fc33 | 147 | LOAD_UTF8_CHARCLASS(X_regular_begin, HYPHEN_UTF8); \ |
61dad979 KW |
148 | LOAD_UTF8_CHARCLASS_NO_CHECK(X_special_begin); \ |
149 | LOAD_UTF8_CHARCLASS(X_extend, COMBINING_GRAVE_ACCENT_UTF8); \ | |
150 | LOAD_UTF8_CHARCLASS_NO_CHECK(X_prepend);/* empty in most releases*/ \ | |
151 | LOAD_UTF8_CHARCLASS(X_L, HANGUL_CHOSEONG_KIYEOK_UTF8); \ | |
152 | LOAD_UTF8_CHARCLASS(X_LV_LVT_V, HANGUL_JUNGSEONG_FILLER_UTF8); \ | |
153 | LOAD_UTF8_CHARCLASS_NO_CHECK(X_RI); /* empty in many releases */ \ | |
154 | LOAD_UTF8_CHARCLASS(X_T, HANGUL_JONGSEONG_KIYEOK_UTF8); \ | |
155 | LOAD_UTF8_CHARCLASS(X_V, HANGUL_JUNGSEONG_FILLER_UTF8) | |
20d0b1e9 | 156 | |
1dcf4a1b | 157 | #define PLACEHOLDER /* Something for the preprocessor to grab onto */ |
d1eb3177 | 158 | |
ee9a90b8 KW |
159 | /* The actual code for CCC_TRY, which uses several variables from the routine |
160 | * it's callable from. It is designed to be the bulk of a case statement. | |
161 | * FUNC is the macro or function to call on non-utf8 targets that indicate if | |
162 | * nextchr matches the class. | |
163 | * UTF8_TEST is the whole test string to use for utf8 targets | |
164 | * LOAD is what to use to test, and if not present to load in the swash for the | |
165 | * class | |
166 | * POS_OR_NEG is either empty or ! to complement the results of FUNC or | |
167 | * UTF8_TEST test. | |
168 | * The logic is: Fail if we're at the end-of-string; otherwise if the target is | |
169 | * utf8 and a variant, load the swash if necessary and test using the utf8 | |
170 | * test. Advance to the next character if test is ok, otherwise fail; If not | |
171 | * utf8 or an invariant under utf8, use the non-utf8 test, and fail if it | |
172 | * fails, or advance to the next character */ | |
173 | ||
174 | #define _CCC_TRY_CODE(POS_OR_NEG, FUNC, UTF8_TEST, CLASS, STR) \ | |
175 | if (locinput >= PL_regeol) { \ | |
176 | sayNO; \ | |
177 | } \ | |
178 | if (utf8_target && UTF8_IS_CONTINUED(nextchr)) { \ | |
179 | LOAD_UTF8_CHARCLASS(CLASS, STR); \ | |
180 | if (POS_OR_NEG (UTF8_TEST)) { \ | |
181 | sayNO; \ | |
182 | } \ | |
183 | locinput += PL_utf8skip[nextchr]; \ | |
184 | nextchr = UCHARAT(locinput); \ | |
185 | break; \ | |
186 | } \ | |
187 | if (POS_OR_NEG (FUNC(nextchr))) { \ | |
188 | sayNO; \ | |
189 | } \ | |
190 | nextchr = UCHARAT(++locinput); \ | |
980866de KW |
191 | break; |
192 | ||
ee9a90b8 KW |
193 | /* Handle the non-locale cases for a character class and its complement. It |
194 | * calls _CCC_TRY_CODE with a ! to complement the test for the character class. | |
195 | * This is because that code fails when the test succeeds, so we want to have | |
196 | * the test fail so that the code succeeds. The swash is stored in a | |
197 | * predictable PL_ place */ | |
cfaf538b KW |
198 | #define _CCC_TRY_NONLOCALE(NAME, NNAME, FUNC, \ |
199 | CLASS, STR) \ | |
ee9a90b8 KW |
200 | case NAME: \ |
201 | _CCC_TRY_CODE( !, FUNC, \ | |
202 | cBOOL(swash_fetch(CAT2(PL_utf8_,CLASS), \ | |
203 | (U8*)locinput, TRUE)), \ | |
204 | CLASS, STR) \ | |
205 | case NNAME: \ | |
1dcf4a1b | 206 | _CCC_TRY_CODE( PLACEHOLDER , FUNC, \ |
ee9a90b8 KW |
207 | cBOOL(swash_fetch(CAT2(PL_utf8_,CLASS), \ |
208 | (U8*)locinput, TRUE)), \ | |
209 | CLASS, STR) \ | |
210 | ||
211 | /* Generate the case statements for both locale and non-locale character | |
212 | * classes in regmatch for classes that don't have special unicode semantics. | |
213 | * Locales don't use an immediate swash, but an intermediary special locale | |
214 | * function that is called on the pointer to the current place in the input | |
215 | * string. That function will resolve to needing the same swash. One might | |
216 | * think that because we don't know what the locale will match, we shouldn't | |
217 | * check with the swash loading function that it loaded properly; ie, that we | |
218 | * should use LOAD_UTF8_CHARCLASS_NO_CHECK for those, but what is passed to the | |
219 | * regular LOAD_UTF8_CHARCLASS is in non-locale terms, and so locale is | |
220 | * irrelevant here */ | |
221 | #define CCC_TRY(NAME, NNAME, FUNC, \ | |
222 | NAMEL, NNAMEL, LCFUNC, LCFUNC_utf8, \ | |
cfaf538b | 223 | NAMEA, NNAMEA, FUNCA, \ |
ee9a90b8 KW |
224 | CLASS, STR) \ |
225 | case NAMEL: \ | |
226 | PL_reg_flags |= RF_tainted; \ | |
227 | _CCC_TRY_CODE( !, LCFUNC, LCFUNC_utf8((U8*)locinput), CLASS, STR) \ | |
228 | case NNAMEL: \ | |
229 | PL_reg_flags |= RF_tainted; \ | |
1dcf4a1b KW |
230 | _CCC_TRY_CODE( PLACEHOLDER, LCFUNC, LCFUNC_utf8((U8*)locinput), \ |
231 | CLASS, STR) \ | |
cfaf538b KW |
232 | case NAMEA: \ |
233 | if (locinput >= PL_regeol || ! FUNCA(nextchr)) { \ | |
234 | sayNO; \ | |
235 | } \ | |
236 | /* Matched a utf8-invariant, so don't have to worry about utf8 */ \ | |
237 | nextchr = UCHARAT(++locinput); \ | |
238 | break; \ | |
239 | case NNAMEA: \ | |
240 | if (locinput >= PL_regeol || FUNCA(nextchr)) { \ | |
241 | sayNO; \ | |
242 | } \ | |
243 | if (utf8_target) { \ | |
244 | locinput += PL_utf8skip[nextchr]; \ | |
245 | nextchr = UCHARAT(locinput); \ | |
246 | } \ | |
247 | else { \ | |
248 | nextchr = UCHARAT(++locinput); \ | |
249 | } \ | |
250 | break; \ | |
ee9a90b8 KW |
251 | /* Generate the non-locale cases */ \ |
252 | _CCC_TRY_NONLOCALE(NAME, NNAME, FUNC, CLASS, STR) | |
253 | ||
254 | /* This is like CCC_TRY, but has an extra set of parameters for generating case | |
255 | * statements to handle separate Unicode semantics nodes */ | |
256 | #define CCC_TRY_U(NAME, NNAME, FUNC, \ | |
257 | NAMEL, NNAMEL, LCFUNC, LCFUNC_utf8, \ | |
258 | NAMEU, NNAMEU, FUNCU, \ | |
cfaf538b | 259 | NAMEA, NNAMEA, FUNCA, \ |
ee9a90b8 | 260 | CLASS, STR) \ |
cfaf538b KW |
261 | CCC_TRY(NAME, NNAME, FUNC, \ |
262 | NAMEL, NNAMEL, LCFUNC, LCFUNC_utf8, \ | |
263 | NAMEA, NNAMEA, FUNCA, \ | |
264 | CLASS, STR) \ | |
ee9a90b8 | 265 | _CCC_TRY_NONLOCALE(NAMEU, NNAMEU, FUNCU, CLASS, STR) |
d1eb3177 | 266 | |
3dab1dad YO |
267 | /* TODO: Combine JUMPABLE and HAS_TEXT to cache OP(rn) */ |
268 | ||
5f80c4cf | 269 | /* for use after a quantifier and before an EXACT-like node -- japhy */ |
c35dcbe2 YO |
270 | /* it would be nice to rework regcomp.sym to generate this stuff. sigh |
271 | * | |
272 | * NOTE that *nothing* that affects backtracking should be in here, specifically | |
273 | * VERBS must NOT be included. JUMPABLE is used to determine if we can ignore a | |
274 | * node that is in between two EXACT like nodes when ascertaining what the required | |
275 | * "follow" character is. This should probably be moved to regex compile time | |
276 | * although it may be done at run time beause of the REF possibility - more | |
277 | * investigation required. -- demerphq | |
278 | */ | |
3e901dc0 YO |
279 | #define JUMPABLE(rn) ( \ |
280 | OP(rn) == OPEN || \ | |
281 | (OP(rn) == CLOSE && (!cur_eval || cur_eval->u.eval.close_paren != ARG(rn))) || \ | |
282 | OP(rn) == EVAL || \ | |
cca55fe3 JP |
283 | OP(rn) == SUSPEND || OP(rn) == IFMATCH || \ |
284 | OP(rn) == PLUS || OP(rn) == MINMOD || \ | |
d1c771f5 | 285 | OP(rn) == KEEPS || \ |
3dab1dad | 286 | (PL_regkind[OP(rn)] == CURLY && ARG1(rn) > 0) \ |
e2d8ce26 | 287 | ) |
ee9b8eae | 288 | #define IS_EXACT(rn) (PL_regkind[OP(rn)] == EXACT) |
e2d8ce26 | 289 | |
ee9b8eae YO |
290 | #define HAS_TEXT(rn) ( IS_EXACT(rn) || PL_regkind[OP(rn)] == REF ) |
291 | ||
292 | #if 0 | |
293 | /* Currently these are only used when PL_regkind[OP(rn)] == EXACT so | |
294 | we don't need this definition. */ | |
295 | #define IS_TEXT(rn) ( OP(rn)==EXACT || OP(rn)==REF || OP(rn)==NREF ) | |
fab2782b | 296 | #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 |
297 | #define IS_TEXTFL(rn) ( OP(rn)==EXACTFL || OP(rn)==REFFL || OP(rn)==NREFFL ) |
298 | ||
299 | #else | |
300 | /* ... so we use this as its faster. */ | |
301 | #define IS_TEXT(rn) ( OP(rn)==EXACT ) | |
fab2782b | 302 | #define IS_TEXTFU(rn) ( OP(rn)==EXACTFU || OP(rn)==EXACTFU_SS || OP(rn)==EXACTFU_TRICKYFOLD || OP(rn) == EXACTFA) |
ee9b8eae YO |
303 | #define IS_TEXTF(rn) ( OP(rn)==EXACTF ) |
304 | #define IS_TEXTFL(rn) ( OP(rn)==EXACTFL ) | |
305 | ||
306 | #endif | |
e2d8ce26 | 307 | |
a84d97b6 HS |
308 | /* |
309 | Search for mandatory following text node; for lookahead, the text must | |
310 | follow but for lookbehind (rn->flags != 0) we skip to the next step. | |
311 | */ | |
cca55fe3 | 312 | #define FIND_NEXT_IMPT(rn) STMT_START { \ |
3dab1dad YO |
313 | while (JUMPABLE(rn)) { \ |
314 | const OPCODE type = OP(rn); \ | |
315 | if (type == SUSPEND || PL_regkind[type] == CURLY) \ | |
e2d8ce26 | 316 | rn = NEXTOPER(NEXTOPER(rn)); \ |
3dab1dad | 317 | else if (type == PLUS) \ |
cca55fe3 | 318 | rn = NEXTOPER(rn); \ |
3dab1dad | 319 | else if (type == IFMATCH) \ |
a84d97b6 | 320 | rn = (rn->flags == 0) ? NEXTOPER(NEXTOPER(rn)) : rn + ARG(rn); \ |
e2d8ce26 | 321 | else rn += NEXT_OFF(rn); \ |
3dab1dad | 322 | } \ |
5f80c4cf | 323 | } STMT_END |
74750237 | 324 | |
c476f425 | 325 | |
acfe0abc | 326 | static void restore_pos(pTHX_ void *arg); |
51371543 | 327 | |
87c0511b | 328 | #define REGCP_PAREN_ELEMS 3 |
f067efbf | 329 | #define REGCP_OTHER_ELEMS 3 |
e0fa7e2b | 330 | #define REGCP_FRAME_ELEMS 1 |
620d5b66 NC |
331 | /* REGCP_FRAME_ELEMS are not part of the REGCP_OTHER_ELEMS and |
332 | * are needed for the regexp context stack bookkeeping. */ | |
333 | ||
76e3520e | 334 | STATIC CHECKPOINT |
b93070ed | 335 | S_regcppush(pTHX_ const regexp *rex, I32 parenfloor) |
a0d0e21e | 336 | { |
97aff369 | 337 | dVAR; |
a3b680e6 | 338 | const int retval = PL_savestack_ix; |
a3b680e6 | 339 | const int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS; |
e0fa7e2b NC |
340 | const UV total_elems = paren_elems_to_push + REGCP_OTHER_ELEMS; |
341 | const UV elems_shifted = total_elems << SAVE_TIGHT_SHIFT; | |
87c0511b | 342 | I32 p; |
40a82448 | 343 | GET_RE_DEBUG_FLAGS_DECL; |
a0d0e21e | 344 | |
b93070ed DM |
345 | PERL_ARGS_ASSERT_REGCPPUSH; |
346 | ||
e49a9654 | 347 | if (paren_elems_to_push < 0) |
5637ef5b NC |
348 | Perl_croak(aTHX_ "panic: paren_elems_to_push, %i < 0", |
349 | paren_elems_to_push); | |
e49a9654 | 350 | |
e0fa7e2b NC |
351 | if ((elems_shifted >> SAVE_TIGHT_SHIFT) != total_elems) |
352 | Perl_croak(aTHX_ "panic: paren_elems_to_push offset %"UVuf | |
5df417d0 JH |
353 | " out of range (%lu-%ld)", |
354 | total_elems, (unsigned long)PL_regsize, (long)parenfloor); | |
e0fa7e2b | 355 | |
620d5b66 | 356 | SSGROW(total_elems + REGCP_FRAME_ELEMS); |
7f69552c | 357 | |
495f47a5 DM |
358 | DEBUG_BUFFERS_r( |
359 | if ((int)PL_regsize > (int)parenfloor) | |
360 | PerlIO_printf(Perl_debug_log, | |
361 | "rex=0x%"UVxf" offs=0x%"UVxf": saving capture indices:\n", | |
362 | PTR2UV(rex), | |
363 | PTR2UV(rex->offs) | |
364 | ); | |
365 | ); | |
87c0511b | 366 | for (p = parenfloor+1; p <= (I32)PL_regsize; p++) { |
b1ce53c5 | 367 | /* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */ |
b93070ed DM |
368 | SSPUSHINT(rex->offs[p].end); |
369 | SSPUSHINT(rex->offs[p].start); | |
1ca2007e | 370 | SSPUSHINT(rex->offs[p].start_tmp); |
e7707071 | 371 | DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log, |
495f47a5 DM |
372 | " \\%"UVuf": %"IVdf"(%"IVdf")..%"IVdf"\n", |
373 | (UV)p, | |
374 | (IV)rex->offs[p].start, | |
375 | (IV)rex->offs[p].start_tmp, | |
376 | (IV)rex->offs[p].end | |
40a82448 | 377 | )); |
a0d0e21e | 378 | } |
b1ce53c5 | 379 | /* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */ |
3280af22 | 380 | SSPUSHINT(PL_regsize); |
b93070ed DM |
381 | SSPUSHINT(rex->lastparen); |
382 | SSPUSHINT(rex->lastcloseparen); | |
e0fa7e2b | 383 | SSPUSHUV(SAVEt_REGCONTEXT | elems_shifted); /* Magic cookie. */ |
41123dfd | 384 | |
a0d0e21e LW |
385 | return retval; |
386 | } | |
387 | ||
c277df42 | 388 | /* These are needed since we do not localize EVAL nodes: */ |
ab3bbdeb YO |
389 | #define REGCP_SET(cp) \ |
390 | DEBUG_STATE_r( \ | |
ab3bbdeb | 391 | PerlIO_printf(Perl_debug_log, \ |
e4f74956 | 392 | " Setting an EVAL scope, savestack=%"IVdf"\n", \ |
ab3bbdeb YO |
393 | (IV)PL_savestack_ix)); \ |
394 | cp = PL_savestack_ix | |
c3464db5 | 395 | |
ab3bbdeb | 396 | #define REGCP_UNWIND(cp) \ |
e4f74956 | 397 | DEBUG_STATE_r( \ |
ab3bbdeb | 398 | if (cp != PL_savestack_ix) \ |
e4f74956 YO |
399 | PerlIO_printf(Perl_debug_log, \ |
400 | " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \ | |
ab3bbdeb YO |
401 | (IV)(cp), (IV)PL_savestack_ix)); \ |
402 | regcpblow(cp) | |
c277df42 | 403 | |
a8d1f4b4 DM |
404 | #define UNWIND_PAREN(lp, lcp) \ |
405 | for (n = rex->lastparen; n > lp; n--) \ | |
406 | rex->offs[n].end = -1; \ | |
407 | rex->lastparen = n; \ | |
408 | rex->lastcloseparen = lcp; | |
409 | ||
410 | ||
f067efbf | 411 | STATIC void |
b93070ed | 412 | S_regcppop(pTHX_ regexp *rex) |
a0d0e21e | 413 | { |
97aff369 | 414 | dVAR; |
e0fa7e2b | 415 | UV i; |
87c0511b | 416 | U32 paren; |
a3621e74 YO |
417 | GET_RE_DEBUG_FLAGS_DECL; |
418 | ||
7918f24d NC |
419 | PERL_ARGS_ASSERT_REGCPPOP; |
420 | ||
b1ce53c5 | 421 | /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */ |
c6bf6a65 | 422 | i = SSPOPUV; |
e0fa7e2b NC |
423 | assert((i & SAVE_MASK) == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */ |
424 | i >>= SAVE_TIGHT_SHIFT; /* Parentheses elements to pop. */ | |
b93070ed DM |
425 | rex->lastcloseparen = SSPOPINT; |
426 | rex->lastparen = SSPOPINT; | |
3280af22 | 427 | PL_regsize = SSPOPINT; |
b1ce53c5 | 428 | |
620d5b66 | 429 | i -= REGCP_OTHER_ELEMS; |
b1ce53c5 | 430 | /* Now restore the parentheses context. */ |
495f47a5 DM |
431 | DEBUG_BUFFERS_r( |
432 | if (i || rex->lastparen + 1 <= rex->nparens) | |
433 | PerlIO_printf(Perl_debug_log, | |
434 | "rex=0x%"UVxf" offs=0x%"UVxf": restoring capture indices to:\n", | |
435 | PTR2UV(rex), | |
436 | PTR2UV(rex->offs) | |
437 | ); | |
438 | ); | |
87c0511b | 439 | paren = PL_regsize; |
620d5b66 | 440 | for ( ; i > 0; i -= REGCP_PAREN_ELEMS) { |
1df70142 | 441 | I32 tmps; |
1ca2007e | 442 | rex->offs[paren].start_tmp = SSPOPINT; |
b93070ed | 443 | rex->offs[paren].start = SSPOPINT; |
cf93c79d | 444 | tmps = SSPOPINT; |
b93070ed DM |
445 | if (paren <= rex->lastparen) |
446 | rex->offs[paren].end = tmps; | |
495f47a5 DM |
447 | DEBUG_BUFFERS_r( PerlIO_printf(Perl_debug_log, |
448 | " \\%"UVuf": %"IVdf"(%"IVdf")..%"IVdf"%s\n", | |
449 | (UV)paren, | |
450 | (IV)rex->offs[paren].start, | |
451 | (IV)rex->offs[paren].start_tmp, | |
452 | (IV)rex->offs[paren].end, | |
453 | (paren > rex->lastparen ? "(skipped)" : "")); | |
c277df42 | 454 | ); |
87c0511b | 455 | paren--; |
a0d0e21e | 456 | } |
daf18116 | 457 | #if 1 |
dafc8851 JH |
458 | /* It would seem that the similar code in regtry() |
459 | * already takes care of this, and in fact it is in | |
460 | * a better location to since this code can #if 0-ed out | |
461 | * but the code in regtry() is needed or otherwise tests | |
462 | * requiring null fields (pat.t#187 and split.t#{13,14} | |
daf18116 JH |
463 | * (as of patchlevel 7877) will fail. Then again, |
464 | * this code seems to be necessary or otherwise | |
225593e1 DM |
465 | * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/ |
466 | * --jhi updated by dapm */ | |
b93070ed | 467 | for (i = rex->lastparen + 1; i <= rex->nparens; i++) { |
097eb12c | 468 | if (i > PL_regsize) |
b93070ed DM |
469 | rex->offs[i].start = -1; |
470 | rex->offs[i].end = -1; | |
495f47a5 DM |
471 | DEBUG_BUFFERS_r( PerlIO_printf(Perl_debug_log, |
472 | " \\%"UVuf": %s ..-1 undeffing\n", | |
473 | (UV)i, | |
474 | (i > PL_regsize) ? "-1" : " " | |
475 | )); | |
a0d0e21e | 476 | } |
dafc8851 | 477 | #endif |
a0d0e21e LW |
478 | } |
479 | ||
74088413 DM |
480 | /* restore the parens and associated vars at savestack position ix, |
481 | * but without popping the stack */ | |
482 | ||
483 | STATIC void | |
484 | S_regcp_restore(pTHX_ regexp *rex, I32 ix) | |
485 | { | |
486 | I32 tmpix = PL_savestack_ix; | |
487 | PL_savestack_ix = ix; | |
488 | regcppop(rex); | |
489 | PL_savestack_ix = tmpix; | |
490 | } | |
491 | ||
02db2b7b | 492 | #define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */ |
a0d0e21e | 493 | |
a687059c | 494 | /* |
e50aee73 | 495 | * pregexec and friends |
a687059c LW |
496 | */ |
497 | ||
76234dfb | 498 | #ifndef PERL_IN_XSUB_RE |
a687059c | 499 | /* |
c277df42 | 500 | - pregexec - match a regexp against a string |
a687059c | 501 | */ |
c277df42 | 502 | I32 |
49d7dfbc | 503 | Perl_pregexec(pTHX_ REGEXP * const prog, char* stringarg, register char *strend, |
c3464db5 | 504 | char *strbeg, I32 minend, SV *screamer, U32 nosave) |
c277df42 IZ |
505 | /* strend: pointer to null at end of string */ |
506 | /* strbeg: real beginning of string */ | |
507 | /* minend: end of match must be >=minend after stringarg. */ | |
508 | /* nosave: For optimizations. */ | |
509 | { | |
7918f24d NC |
510 | PERL_ARGS_ASSERT_PREGEXEC; |
511 | ||
c277df42 | 512 | return |
9041c2e3 | 513 | regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL, |
c277df42 IZ |
514 | nosave ? 0 : REXEC_COPY_STR); |
515 | } | |
76234dfb | 516 | #endif |
22e551b9 | 517 | |
9041c2e3 | 518 | /* |
cad2e5aa JH |
519 | * Need to implement the following flags for reg_anch: |
520 | * | |
521 | * USE_INTUIT_NOML - Useful to call re_intuit_start() first | |
522 | * USE_INTUIT_ML | |
523 | * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer | |
524 | * INTUIT_AUTORITATIVE_ML | |
525 | * INTUIT_ONCE_NOML - Intuit can match in one location only. | |
526 | * INTUIT_ONCE_ML | |
527 | * | |
528 | * Another flag for this function: SECOND_TIME (so that float substrs | |
529 | * with giant delta may be not rechecked). | |
530 | */ | |
531 | ||
532 | /* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */ | |
533 | ||
3f7c398e | 534 | /* If SCREAM, then SvPVX_const(sv) should be compatible with strpos and strend. |
cad2e5aa JH |
535 | Otherwise, only SvCUR(sv) is used to get strbeg. */ |
536 | ||
537 | /* XXXX We assume that strpos is strbeg unless sv. */ | |
538 | ||
6eb5f6b9 JH |
539 | /* XXXX Some places assume that there is a fixed substring. |
540 | An update may be needed if optimizer marks as "INTUITable" | |
541 | RExen without fixed substrings. Similarly, it is assumed that | |
542 | lengths of all the strings are no more than minlen, thus they | |
543 | cannot come from lookahead. | |
40d049e4 YO |
544 | (Or minlen should take into account lookahead.) |
545 | NOTE: Some of this comment is not correct. minlen does now take account | |
546 | of lookahead/behind. Further research is required. -- demerphq | |
547 | ||
548 | */ | |
6eb5f6b9 | 549 | |
2c2d71f5 JH |
550 | /* A failure to find a constant substring means that there is no need to make |
551 | an expensive call to REx engine, thus we celebrate a failure. Similarly, | |
552 | finding a substring too deep into the string means that less calls to | |
30944b6d IZ |
553 | regtry() should be needed. |
554 | ||
555 | REx compiler's optimizer found 4 possible hints: | |
556 | a) Anchored substring; | |
557 | b) Fixed substring; | |
558 | c) Whether we are anchored (beginning-of-line or \G); | |
486ec47a | 559 | d) First node (of those at offset 0) which may distinguish positions; |
6eb5f6b9 | 560 | We use a)b)d) and multiline-part of c), and try to find a position in the |
30944b6d IZ |
561 | string which does not contradict any of them. |
562 | */ | |
2c2d71f5 | 563 | |
6eb5f6b9 JH |
564 | /* Most of decisions we do here should have been done at compile time. |
565 | The nodes of the REx which we used for the search should have been | |
566 | deleted from the finite automaton. */ | |
567 | ||
cad2e5aa | 568 | char * |
288b8c02 | 569 | Perl_re_intuit_start(pTHX_ REGEXP * const rx, SV *sv, char *strpos, |
9f61653a | 570 | char *strend, const U32 flags, re_scream_pos_data *data) |
cad2e5aa | 571 | { |
97aff369 | 572 | dVAR; |
288b8c02 | 573 | struct regexp *const prog = (struct regexp *)SvANY(rx); |
eb578fdb | 574 | I32 start_shift = 0; |
cad2e5aa | 575 | /* Should be nonnegative! */ |
eb578fdb KW |
576 | I32 end_shift = 0; |
577 | char *s; | |
578 | SV *check; | |
a1933d95 | 579 | char *strbeg; |
cad2e5aa | 580 | char *t; |
f2ed9b32 | 581 | const bool utf8_target = (sv && SvUTF8(sv)) ? 1 : 0; /* if no sv we have to assume bytes */ |
cad2e5aa | 582 | I32 ml_anch; |
eb578fdb | 583 | char *other_last = NULL; /* other substr checked before this */ |
bd61b366 | 584 | char *check_at = NULL; /* check substr found at this pos */ |
d8080198 | 585 | char *checked_upto = NULL; /* how far into the string we have already checked using find_byclass*/ |
bbe252da | 586 | const I32 multiline = prog->extflags & RXf_PMf_MULTILINE; |
f8fc2ecf | 587 | RXi_GET_DECL(prog,progi); |
30944b6d | 588 | #ifdef DEBUGGING |
890ce7af | 589 | const char * const i_strpos = strpos; |
30944b6d | 590 | #endif |
a3621e74 YO |
591 | GET_RE_DEBUG_FLAGS_DECL; |
592 | ||
7918f24d | 593 | PERL_ARGS_ASSERT_RE_INTUIT_START; |
c33e64f0 FC |
594 | PERL_UNUSED_ARG(flags); |
595 | PERL_UNUSED_ARG(data); | |
7918f24d | 596 | |
f2ed9b32 | 597 | RX_MATCH_UTF8_set(rx,utf8_target); |
cad2e5aa | 598 | |
3c8556c3 | 599 | if (RX_UTF8(rx)) { |
b8d68ded JH |
600 | PL_reg_flags |= RF_utf8; |
601 | } | |
ab3bbdeb | 602 | DEBUG_EXECUTE_r( |
f2ed9b32 | 603 | debug_start_match(rx, utf8_target, strpos, strend, |
1de06328 YO |
604 | sv ? "Guessing start of match in sv for" |
605 | : "Guessing start of match in string for"); | |
2a782b5b | 606 | ); |
cad2e5aa | 607 | |
c344f387 JH |
608 | /* CHR_DIST() would be more correct here but it makes things slow. */ |
609 | if (prog->minlen > strend - strpos) { | |
a3621e74 | 610 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
a72c7584 | 611 | "String too short... [re_intuit_start]\n")); |
cad2e5aa | 612 | goto fail; |
2c2d71f5 | 613 | } |
1de06328 | 614 | |
a1933d95 | 615 | strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos; |
1aa99e6b | 616 | PL_regeol = strend; |
f2ed9b32 | 617 | if (utf8_target) { |
33b8afdf JH |
618 | if (!prog->check_utf8 && prog->check_substr) |
619 | to_utf8_substr(prog); | |
620 | check = prog->check_utf8; | |
621 | } else { | |
622 | if (!prog->check_substr && prog->check_utf8) | |
623 | to_byte_substr(prog); | |
624 | check = prog->check_substr; | |
625 | } | |
1de06328 | 626 | if (check == &PL_sv_undef) { |
a3621e74 | 627 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
1de06328 | 628 | "Non-utf8 string cannot match utf8 check string\n")); |
33b8afdf JH |
629 | goto fail; |
630 | } | |
bbe252da YO |
631 | if (prog->extflags & RXf_ANCH) { /* Match at beg-of-str or after \n */ |
632 | ml_anch = !( (prog->extflags & RXf_ANCH_SINGLE) | |
633 | || ( (prog->extflags & RXf_ANCH_BOL) | |
7fba1cd6 | 634 | && !multiline ) ); /* Check after \n? */ |
cad2e5aa | 635 | |
7e25d62c | 636 | if (!ml_anch) { |
bbe252da YO |
637 | if ( !(prog->extflags & RXf_ANCH_GPOS) /* Checked by the caller */ |
638 | && !(prog->intflags & PREGf_IMPLICIT) /* not a real BOL */ | |
3f7c398e | 639 | /* SvCUR is not set on references: SvRV and SvPVX_const overlap */ |
7e25d62c JH |
640 | && sv && !SvROK(sv) |
641 | && (strpos != strbeg)) { | |
a3621e74 | 642 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not at start...\n")); |
7e25d62c JH |
643 | goto fail; |
644 | } | |
645 | if (prog->check_offset_min == prog->check_offset_max && | |
bbe252da | 646 | !(prog->extflags & RXf_CANY_SEEN)) { |
2c2d71f5 | 647 | /* Substring at constant offset from beg-of-str... */ |
cad2e5aa JH |
648 | I32 slen; |
649 | ||
1aa99e6b | 650 | s = HOP3c(strpos, prog->check_offset_min, strend); |
1de06328 | 651 | |
653099ff GS |
652 | if (SvTAIL(check)) { |
653 | slen = SvCUR(check); /* >= 1 */ | |
cad2e5aa | 654 | |
9041c2e3 | 655 | if ( strend - s > slen || strend - s < slen - 1 |
2c2d71f5 | 656 | || (strend - s == slen && strend[-1] != '\n')) { |
a3621e74 | 657 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String too long...\n")); |
2c2d71f5 | 658 | goto fail_finish; |
cad2e5aa JH |
659 | } |
660 | /* Now should match s[0..slen-2] */ | |
661 | slen--; | |
3f7c398e | 662 | if (slen && (*SvPVX_const(check) != *s |
cad2e5aa | 663 | || (slen > 1 |
3f7c398e | 664 | && memNE(SvPVX_const(check), s, slen)))) { |
2c2d71f5 | 665 | report_neq: |
a3621e74 | 666 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String not equal...\n")); |
2c2d71f5 JH |
667 | goto fail_finish; |
668 | } | |
cad2e5aa | 669 | } |
3f7c398e | 670 | else if (*SvPVX_const(check) != *s |
653099ff | 671 | || ((slen = SvCUR(check)) > 1 |
3f7c398e | 672 | && memNE(SvPVX_const(check), s, slen))) |
2c2d71f5 | 673 | goto report_neq; |
c315bfe8 | 674 | check_at = s; |
2c2d71f5 | 675 | goto success_at_start; |
7e25d62c | 676 | } |
cad2e5aa | 677 | } |
2c2d71f5 | 678 | /* Match is anchored, but substr is not anchored wrt beg-of-str. */ |
cad2e5aa | 679 | s = strpos; |
2c2d71f5 | 680 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
1de06328 YO |
681 | end_shift = prog->check_end_shift; |
682 | ||
2c2d71f5 | 683 | if (!ml_anch) { |
a3b680e6 | 684 | const I32 end = prog->check_offset_max + CHR_SVLEN(check) |
653099ff | 685 | - (SvTAIL(check) != 0); |
a3b680e6 | 686 | const I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end; |
2c2d71f5 JH |
687 | |
688 | if (end_shift < eshift) | |
689 | end_shift = eshift; | |
690 | } | |
cad2e5aa | 691 | } |
2c2d71f5 | 692 | else { /* Can match at random position */ |
cad2e5aa JH |
693 | ml_anch = 0; |
694 | s = strpos; | |
1de06328 YO |
695 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
696 | end_shift = prog->check_end_shift; | |
697 | ||
698 | /* end shift should be non negative here */ | |
cad2e5aa JH |
699 | } |
700 | ||
bcdf7404 | 701 | #ifdef QDEBUGGING /* 7/99: reports of failure (with the older version) */ |
0033605d | 702 | if (end_shift < 0) |
1de06328 | 703 | Perl_croak(aTHX_ "panic: end_shift: %"IVdf" pattern:\n%s\n ", |
220fc49f | 704 | (IV)end_shift, RX_PRECOMP(prog)); |
2c2d71f5 JH |
705 | #endif |
706 | ||
2c2d71f5 JH |
707 | restart: |
708 | /* Find a possible match in the region s..strend by looking for | |
709 | the "check" substring in the region corrected by start/end_shift. */ | |
1de06328 YO |
710 | |
711 | { | |
712 | I32 srch_start_shift = start_shift; | |
713 | I32 srch_end_shift = end_shift; | |
c33e64f0 FC |
714 | U8* start_point; |
715 | U8* end_point; | |
1de06328 YO |
716 | if (srch_start_shift < 0 && strbeg - s > srch_start_shift) { |
717 | srch_end_shift -= ((strbeg - s) - srch_start_shift); | |
718 | srch_start_shift = strbeg - s; | |
719 | } | |
6bda09f9 | 720 | DEBUG_OPTIMISE_MORE_r({ |
1de06328 YO |
721 | PerlIO_printf(Perl_debug_log, "Check offset min: %"IVdf" Start shift: %"IVdf" End shift %"IVdf" Real End Shift: %"IVdf"\n", |
722 | (IV)prog->check_offset_min, | |
723 | (IV)srch_start_shift, | |
724 | (IV)srch_end_shift, | |
725 | (IV)prog->check_end_shift); | |
726 | }); | |
727 | ||
bbe252da | 728 | if (prog->extflags & RXf_CANY_SEEN) { |
1de06328 YO |
729 | start_point= (U8*)(s + srch_start_shift); |
730 | end_point= (U8*)(strend - srch_end_shift); | |
731 | } else { | |
732 | start_point= HOP3(s, srch_start_shift, srch_start_shift < 0 ? strbeg : strend); | |
733 | end_point= HOP3(strend, -srch_end_shift, strbeg); | |
734 | } | |
6bda09f9 | 735 | DEBUG_OPTIMISE_MORE_r({ |
56570a2c | 736 | PerlIO_printf(Perl_debug_log, "fbm_instr len=%d str=<%.*s>\n", |
1de06328 | 737 | (int)(end_point - start_point), |
fc8cd66c | 738 | (int)(end_point - start_point) > 20 ? 20 : (int)(end_point - start_point), |
1de06328 YO |
739 | start_point); |
740 | }); | |
741 | ||
742 | s = fbm_instr( start_point, end_point, | |
7fba1cd6 | 743 | check, multiline ? FBMrf_MULTILINE : 0); |
1de06328 | 744 | } |
cad2e5aa JH |
745 | /* Update the count-of-usability, remove useless subpatterns, |
746 | unshift s. */ | |
2c2d71f5 | 747 | |
ab3bbdeb | 748 | DEBUG_EXECUTE_r({ |
f2ed9b32 | 749 | RE_PV_QUOTED_DECL(quoted, utf8_target, PERL_DEBUG_PAD_ZERO(0), |
ab3bbdeb YO |
750 | SvPVX_const(check), RE_SV_DUMPLEN(check), 30); |
751 | PerlIO_printf(Perl_debug_log, "%s %s substr %s%s%s", | |
2c2d71f5 | 752 | (s ? "Found" : "Did not find"), |
f2ed9b32 | 753 | (check == (utf8_target ? prog->anchored_utf8 : prog->anchored_substr) |
ab3bbdeb YO |
754 | ? "anchored" : "floating"), |
755 | quoted, | |
756 | RE_SV_TAIL(check), | |
757 | (s ? " at offset " : "...\n") ); | |
758 | }); | |
2c2d71f5 JH |
759 | |
760 | if (!s) | |
761 | goto fail_finish; | |
2c2d71f5 | 762 | /* Finish the diagnostic message */ |
a3621e74 | 763 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) ); |
2c2d71f5 | 764 | |
1de06328 YO |
765 | /* XXX dmq: first branch is for positive lookbehind... |
766 | Our check string is offset from the beginning of the pattern. | |
767 | So we need to do any stclass tests offset forward from that | |
768 | point. I think. :-( | |
769 | */ | |
770 | ||
771 | ||
772 | ||
773 | check_at=s; | |
774 | ||
775 | ||
2c2d71f5 JH |
776 | /* Got a candidate. Check MBOL anchoring, and the *other* substr. |
777 | Start with the other substr. | |
778 | XXXX no SCREAM optimization yet - and a very coarse implementation | |
a0288114 | 779 | XXXX /ttx+/ results in anchored="ttx", floating="x". floating will |
2c2d71f5 JH |
780 | *always* match. Probably should be marked during compile... |
781 | Probably it is right to do no SCREAM here... | |
782 | */ | |
783 | ||
f2ed9b32 | 784 | if (utf8_target ? (prog->float_utf8 && prog->anchored_utf8) |
1de06328 YO |
785 | : (prog->float_substr && prog->anchored_substr)) |
786 | { | |
30944b6d | 787 | /* Take into account the "other" substring. */ |
2c2d71f5 JH |
788 | /* XXXX May be hopelessly wrong for UTF... */ |
789 | if (!other_last) | |
6eb5f6b9 | 790 | other_last = strpos; |
f2ed9b32 | 791 | if (check == (utf8_target ? prog->float_utf8 : prog->float_substr)) { |
30944b6d IZ |
792 | do_other_anchored: |
793 | { | |
890ce7af AL |
794 | char * const last = HOP3c(s, -start_shift, strbeg); |
795 | char *last1, *last2; | |
be8e71aa | 796 | char * const saved_s = s; |
33b8afdf | 797 | SV* must; |
2c2d71f5 | 798 | |
2c2d71f5 JH |
799 | t = s - prog->check_offset_max; |
800 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ | |
f2ed9b32 | 801 | && (!utf8_target |
0ce71af7 | 802 | || ((t = (char*)reghopmaybe3((U8*)s, -(prog->check_offset_max), (U8*)strpos)) |
2c2d71f5 | 803 | && t > strpos))) |
6f207bd3 | 804 | NOOP; |
2c2d71f5 JH |
805 | else |
806 | t = strpos; | |
1aa99e6b | 807 | t = HOP3c(t, prog->anchored_offset, strend); |
6eb5f6b9 JH |
808 | if (t < other_last) /* These positions already checked */ |
809 | t = other_last; | |
1aa99e6b | 810 | last2 = last1 = HOP3c(strend, -prog->minlen, strbeg); |
2c2d71f5 JH |
811 | if (last < last1) |
812 | last1 = last; | |
1de06328 YO |
813 | /* XXXX It is not documented what units *_offsets are in. |
814 | We assume bytes, but this is clearly wrong. | |
815 | Meaning this code needs to be carefully reviewed for errors. | |
816 | dmq. | |
817 | */ | |
818 | ||
2c2d71f5 | 819 | /* On end-of-str: see comment below. */ |
f2ed9b32 | 820 | must = utf8_target ? prog->anchored_utf8 : prog->anchored_substr; |
33b8afdf JH |
821 | if (must == &PL_sv_undef) { |
822 | s = (char*)NULL; | |
1de06328 | 823 | DEBUG_r(must = prog->anchored_utf8); /* for debug */ |
33b8afdf JH |
824 | } |
825 | else | |
826 | s = fbm_instr( | |
827 | (unsigned char*)t, | |
828 | HOP3(HOP3(last1, prog->anchored_offset, strend) | |
829 | + SvCUR(must), -(SvTAIL(must)!=0), strbeg), | |
830 | must, | |
7fba1cd6 | 831 | multiline ? FBMrf_MULTILINE : 0 |
33b8afdf | 832 | ); |
ab3bbdeb | 833 | DEBUG_EXECUTE_r({ |
f2ed9b32 | 834 | RE_PV_QUOTED_DECL(quoted, utf8_target, PERL_DEBUG_PAD_ZERO(0), |
ab3bbdeb YO |
835 | SvPVX_const(must), RE_SV_DUMPLEN(must), 30); |
836 | PerlIO_printf(Perl_debug_log, "%s anchored substr %s%s", | |
2c2d71f5 | 837 | (s ? "Found" : "Contradicts"), |
ab3bbdeb YO |
838 | quoted, RE_SV_TAIL(must)); |
839 | }); | |
840 | ||
841 | ||
2c2d71f5 JH |
842 | if (!s) { |
843 | if (last1 >= last2) { | |
a3621e74 | 844 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
2c2d71f5 JH |
845 | ", giving up...\n")); |
846 | goto fail_finish; | |
847 | } | |
a3621e74 | 848 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
2c2d71f5 | 849 | ", trying floating at offset %ld...\n", |
be8e71aa | 850 | (long)(HOP3c(saved_s, 1, strend) - i_strpos))); |
1aa99e6b IH |
851 | other_last = HOP3c(last1, prog->anchored_offset+1, strend); |
852 | s = HOP3c(last, 1, strend); | |
2c2d71f5 JH |
853 | goto restart; |
854 | } | |
855 | else { | |
a3621e74 | 856 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", |
30944b6d | 857 | (long)(s - i_strpos))); |
1aa99e6b IH |
858 | t = HOP3c(s, -prog->anchored_offset, strbeg); |
859 | other_last = HOP3c(s, 1, strend); | |
be8e71aa | 860 | s = saved_s; |
2c2d71f5 JH |
861 | if (t == strpos) |
862 | goto try_at_start; | |
2c2d71f5 JH |
863 | goto try_at_offset; |
864 | } | |
30944b6d | 865 | } |
2c2d71f5 JH |
866 | } |
867 | else { /* Take into account the floating substring. */ | |
33b8afdf | 868 | char *last, *last1; |
be8e71aa | 869 | char * const saved_s = s; |
33b8afdf JH |
870 | SV* must; |
871 | ||
872 | t = HOP3c(s, -start_shift, strbeg); | |
873 | last1 = last = | |
874 | HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg); | |
875 | if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset) | |
876 | last = HOP3c(t, prog->float_max_offset, strend); | |
877 | s = HOP3c(t, prog->float_min_offset, strend); | |
878 | if (s < other_last) | |
879 | s = other_last; | |
2c2d71f5 | 880 | /* XXXX It is not documented what units *_offsets are in. Assume bytes. */ |
f2ed9b32 | 881 | must = utf8_target ? prog->float_utf8 : prog->float_substr; |
33b8afdf JH |
882 | /* fbm_instr() takes into account exact value of end-of-str |
883 | if the check is SvTAIL(ed). Since false positives are OK, | |
884 | and end-of-str is not later than strend we are OK. */ | |
885 | if (must == &PL_sv_undef) { | |
886 | s = (char*)NULL; | |
1de06328 | 887 | DEBUG_r(must = prog->float_utf8); /* for debug message */ |
33b8afdf JH |
888 | } |
889 | else | |
2c2d71f5 | 890 | s = fbm_instr((unsigned char*)s, |
33b8afdf JH |
891 | (unsigned char*)last + SvCUR(must) |
892 | - (SvTAIL(must)!=0), | |
7fba1cd6 | 893 | must, multiline ? FBMrf_MULTILINE : 0); |
ab3bbdeb | 894 | DEBUG_EXECUTE_r({ |
f2ed9b32 | 895 | RE_PV_QUOTED_DECL(quoted, utf8_target, PERL_DEBUG_PAD_ZERO(0), |
ab3bbdeb YO |
896 | SvPVX_const(must), RE_SV_DUMPLEN(must), 30); |
897 | PerlIO_printf(Perl_debug_log, "%s floating substr %s%s", | |
33b8afdf | 898 | (s ? "Found" : "Contradicts"), |
ab3bbdeb YO |
899 | quoted, RE_SV_TAIL(must)); |
900 | }); | |
33b8afdf JH |
901 | if (!s) { |
902 | if (last1 == last) { | |
a3621e74 | 903 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
33b8afdf JH |
904 | ", giving up...\n")); |
905 | goto fail_finish; | |
2c2d71f5 | 906 | } |
a3621e74 | 907 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
33b8afdf | 908 | ", trying anchored starting at offset %ld...\n", |
be8e71aa | 909 | (long)(saved_s + 1 - i_strpos))); |
33b8afdf JH |
910 | other_last = last; |
911 | s = HOP3c(t, 1, strend); | |
912 | goto restart; | |
913 | } | |
914 | else { | |
a3621e74 | 915 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", |
33b8afdf JH |
916 | (long)(s - i_strpos))); |
917 | other_last = s; /* Fix this later. --Hugo */ | |
be8e71aa | 918 | s = saved_s; |
33b8afdf JH |
919 | if (t == strpos) |
920 | goto try_at_start; | |
921 | goto try_at_offset; | |
922 | } | |
2c2d71f5 | 923 | } |
cad2e5aa | 924 | } |
2c2d71f5 | 925 | |
1de06328 | 926 | |
9ef43ace | 927 | t= (char*)HOP3( s, -prog->check_offset_max, (prog->check_offset_max<0) ? strend : strpos); |
1de06328 | 928 | |
6bda09f9 | 929 | DEBUG_OPTIMISE_MORE_r( |
1de06328 YO |
930 | PerlIO_printf(Perl_debug_log, |
931 | "Check offset min:%"IVdf" max:%"IVdf" S:%"IVdf" t:%"IVdf" D:%"IVdf" end:%"IVdf"\n", | |
932 | (IV)prog->check_offset_min, | |
933 | (IV)prog->check_offset_max, | |
934 | (IV)(s-strpos), | |
935 | (IV)(t-strpos), | |
936 | (IV)(t-s), | |
937 | (IV)(strend-strpos) | |
938 | ) | |
939 | ); | |
940 | ||
2c2d71f5 | 941 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ |
f2ed9b32 | 942 | && (!utf8_target |
9ef43ace | 943 | || ((t = (char*)reghopmaybe3((U8*)s, -prog->check_offset_max, (U8*) ((prog->check_offset_max<0) ? strend : strpos))) |
1de06328 YO |
944 | && t > strpos))) |
945 | { | |
2c2d71f5 JH |
946 | /* Fixed substring is found far enough so that the match |
947 | cannot start at strpos. */ | |
948 | try_at_offset: | |
cad2e5aa | 949 | if (ml_anch && t[-1] != '\n') { |
30944b6d IZ |
950 | /* Eventually fbm_*() should handle this, but often |
951 | anchored_offset is not 0, so this check will not be wasted. */ | |
952 | /* XXXX In the code below we prefer to look for "^" even in | |
953 | presence of anchored substrings. And we search even | |
954 | beyond the found float position. These pessimizations | |
955 | are historical artefacts only. */ | |
956 | find_anchor: | |
2c2d71f5 | 957 | while (t < strend - prog->minlen) { |
cad2e5aa | 958 | if (*t == '\n') { |
4ee3650e | 959 | if (t < check_at - prog->check_offset_min) { |
f2ed9b32 | 960 | if (utf8_target ? prog->anchored_utf8 : prog->anchored_substr) { |
4ee3650e GS |
961 | /* Since we moved from the found position, |
962 | we definitely contradict the found anchored | |
30944b6d IZ |
963 | substr. Due to the above check we do not |
964 | contradict "check" substr. | |
965 | Thus we can arrive here only if check substr | |
966 | is float. Redo checking for "other"=="fixed". | |
967 | */ | |
9041c2e3 | 968 | strpos = t + 1; |
a3621e74 | 969 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n", |
e4584336 | 970 | PL_colors[0], PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset))); |
30944b6d IZ |
971 | goto do_other_anchored; |
972 | } | |
4ee3650e GS |
973 | /* We don't contradict the found floating substring. */ |
974 | /* XXXX Why not check for STCLASS? */ | |
cad2e5aa | 975 | s = t + 1; |
a3621e74 | 976 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n", |
e4584336 | 977 | PL_colors[0], PL_colors[1], (long)(s - i_strpos))); |
cad2e5aa JH |
978 | goto set_useful; |
979 | } | |
4ee3650e GS |
980 | /* Position contradicts check-string */ |
981 | /* XXXX probably better to look for check-string | |
982 | than for "\n", so one should lower the limit for t? */ | |
a3621e74 | 983 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n", |
e4584336 | 984 | PL_colors[0], PL_colors[1], (long)(t + 1 - i_strpos))); |
0e41cd87 | 985 | other_last = strpos = s = t + 1; |
cad2e5aa JH |
986 | goto restart; |
987 | } | |
988 | t++; | |
989 | } | |
a3621e74 | 990 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n", |
e4584336 | 991 | PL_colors[0], PL_colors[1])); |
2c2d71f5 | 992 | goto fail_finish; |
cad2e5aa | 993 | } |
f5952150 | 994 | else { |
a3621e74 | 995 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n", |
e4584336 | 996 | PL_colors[0], PL_colors[1])); |
f5952150 | 997 | } |
cad2e5aa JH |
998 | s = t; |
999 | set_useful: | |
f2ed9b32 | 1000 | ++BmUSEFUL(utf8_target ? prog->check_utf8 : prog->check_substr); /* hooray/5 */ |
cad2e5aa JH |
1001 | } |
1002 | else { | |
f5952150 | 1003 | /* The found string does not prohibit matching at strpos, |
2c2d71f5 | 1004 | - no optimization of calling REx engine can be performed, |
f5952150 GS |
1005 | unless it was an MBOL and we are not after MBOL, |
1006 | or a future STCLASS check will fail this. */ | |
2c2d71f5 JH |
1007 | try_at_start: |
1008 | /* Even in this situation we may use MBOL flag if strpos is offset | |
1009 | wrt the start of the string. */ | |
05b4157f | 1010 | if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */ |
a1933d95 | 1011 | && (strpos != strbeg) && strpos[-1] != '\n' |
d506a20d | 1012 | /* May be due to an implicit anchor of m{.*foo} */ |
bbe252da | 1013 | && !(prog->intflags & PREGf_IMPLICIT)) |
d506a20d | 1014 | { |
cad2e5aa JH |
1015 | t = strpos; |
1016 | goto find_anchor; | |
1017 | } | |
a3621e74 | 1018 | DEBUG_EXECUTE_r( if (ml_anch) |
f5952150 | 1019 | PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n", |
70685ca0 | 1020 | (long)(strpos - i_strpos), PL_colors[0], PL_colors[1]); |
30944b6d | 1021 | ); |
2c2d71f5 | 1022 | success_at_start: |
bbe252da | 1023 | if (!(prog->intflags & PREGf_NAUGHTY) /* XXXX If strpos moved? */ |
f2ed9b32 | 1024 | && (utf8_target ? ( |
33b8afdf JH |
1025 | prog->check_utf8 /* Could be deleted already */ |
1026 | && --BmUSEFUL(prog->check_utf8) < 0 | |
1027 | && (prog->check_utf8 == prog->float_utf8) | |
1028 | ) : ( | |
1029 | prog->check_substr /* Could be deleted already */ | |
1030 | && --BmUSEFUL(prog->check_substr) < 0 | |
1031 | && (prog->check_substr == prog->float_substr) | |
1032 | ))) | |
66e933ab | 1033 | { |
cad2e5aa | 1034 | /* If flags & SOMETHING - do not do it many times on the same match */ |
a3621e74 | 1035 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n")); |
f2ed9b32 KW |
1036 | /* XXX Does the destruction order has to change with utf8_target? */ |
1037 | SvREFCNT_dec(utf8_target ? prog->check_utf8 : prog->check_substr); | |
1038 | SvREFCNT_dec(utf8_target ? prog->check_substr : prog->check_utf8); | |
a0714e2c SS |
1039 | prog->check_substr = prog->check_utf8 = NULL; /* disable */ |
1040 | prog->float_substr = prog->float_utf8 = NULL; /* clear */ | |
1041 | check = NULL; /* abort */ | |
cad2e5aa | 1042 | s = strpos; |
486ec47a | 1043 | /* XXXX If the check string was an implicit check MBOL, then we need to unset the relevant flag |
c9415951 YO |
1044 | see http://bugs.activestate.com/show_bug.cgi?id=87173 */ |
1045 | if (prog->intflags & PREGf_IMPLICIT) | |
1046 | prog->extflags &= ~RXf_ANCH_MBOL; | |
3cf5c195 IZ |
1047 | /* XXXX This is a remnant of the old implementation. It |
1048 | looks wasteful, since now INTUIT can use many | |
6eb5f6b9 | 1049 | other heuristics. */ |
bbe252da | 1050 | prog->extflags &= ~RXf_USE_INTUIT; |
c9415951 | 1051 | /* XXXX What other flags might need to be cleared in this branch? */ |
cad2e5aa JH |
1052 | } |
1053 | else | |
1054 | s = strpos; | |
1055 | } | |
1056 | ||
6eb5f6b9 JH |
1057 | /* Last resort... */ |
1058 | /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */ | |
1de06328 YO |
1059 | /* trie stclasses are too expensive to use here, we are better off to |
1060 | leave it to regmatch itself */ | |
f8fc2ecf | 1061 | if (progi->regstclass && PL_regkind[OP(progi->regstclass)]!=TRIE) { |
6eb5f6b9 JH |
1062 | /* minlen == 0 is possible if regstclass is \b or \B, |
1063 | and the fixed substr is ''$. | |
1064 | Since minlen is already taken into account, s+1 is before strend; | |
1065 | accidentally, minlen >= 1 guaranties no false positives at s + 1 | |
1066 | even for \b or \B. But (minlen? 1 : 0) below assumes that | |
1067 | regstclass does not come from lookahead... */ | |
1068 | /* If regstclass takes bytelength more than 1: If charlength==1, OK. | |
af944926 | 1069 | This leaves EXACTF-ish only, which are dealt with in find_byclass(). */ |
f8fc2ecf YO |
1070 | const U8* const str = (U8*)STRING(progi->regstclass); |
1071 | const int cl_l = (PL_regkind[OP(progi->regstclass)] == EXACT | |
1072 | ? CHR_DIST(str+STR_LEN(progi->regstclass), str) | |
66e933ab | 1073 | : 1); |
1de06328 YO |
1074 | char * endpos; |
1075 | if (prog->anchored_substr || prog->anchored_utf8 || ml_anch) | |
1076 | endpos= HOP3c(s, (prog->minlen ? cl_l : 0), strend); | |
1077 | else if (prog->float_substr || prog->float_utf8) | |
1078 | endpos= HOP3c(HOP3c(check_at, -start_shift, strbeg), cl_l, strend); | |
1079 | else | |
1080 | endpos= strend; | |
1081 | ||
d8080198 YO |
1082 | if (checked_upto < s) |
1083 | checked_upto = s; | |
1084 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %"IVdf" s: %"IVdf" endpos: %"IVdf" checked_upto: %"IVdf"\n", | |
1085 | (IV)start_shift, (IV)(check_at - strbeg), (IV)(s - strbeg), (IV)(endpos - strbeg), (IV)(checked_upto- strbeg))); | |
1086 | ||
6eb5f6b9 | 1087 | t = s; |
d8080198 YO |
1088 | s = find_byclass(prog, progi->regstclass, checked_upto, endpos, NULL); |
1089 | if (s) { | |
1090 | checked_upto = s; | |
1091 | } else { | |
6eb5f6b9 | 1092 | #ifdef DEBUGGING |
cbbf8932 | 1093 | const char *what = NULL; |
6eb5f6b9 JH |
1094 | #endif |
1095 | if (endpos == strend) { | |
a3621e74 | 1096 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
6eb5f6b9 JH |
1097 | "Could not match STCLASS...\n") ); |
1098 | goto fail; | |
1099 | } | |
a3621e74 | 1100 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
66e933ab | 1101 | "This position contradicts STCLASS...\n") ); |
bbe252da | 1102 | if ((prog->extflags & RXf_ANCH) && !ml_anch) |
653099ff | 1103 | goto fail; |
d8080198 YO |
1104 | checked_upto = HOPBACKc(endpos, start_shift); |
1105 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %"IVdf" endpos: %"IVdf" checked_upto: %"IVdf"\n", | |
1106 | (IV)start_shift, (IV)(check_at - strbeg), (IV)(endpos - strbeg), (IV)(checked_upto- strbeg))); | |
6eb5f6b9 | 1107 | /* Contradict one of substrings */ |
33b8afdf | 1108 | if (prog->anchored_substr || prog->anchored_utf8) { |
f2ed9b32 | 1109 | if ((utf8_target ? prog->anchored_utf8 : prog->anchored_substr) == check) { |
a3621e74 | 1110 | DEBUG_EXECUTE_r( what = "anchored" ); |
6eb5f6b9 | 1111 | hop_and_restart: |
1aa99e6b | 1112 | s = HOP3c(t, 1, strend); |
66e933ab GS |
1113 | if (s + start_shift + end_shift > strend) { |
1114 | /* XXXX Should be taken into account earlier? */ | |
a3621e74 | 1115 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
66e933ab GS |
1116 | "Could not match STCLASS...\n") ); |
1117 | goto fail; | |
1118 | } | |
5e39e1e5 HS |
1119 | if (!check) |
1120 | goto giveup; | |
a3621e74 | 1121 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 1122 | "Looking for %s substr starting at offset %ld...\n", |
6eb5f6b9 JH |
1123 | what, (long)(s + start_shift - i_strpos)) ); |
1124 | goto restart; | |
1125 | } | |
66e933ab | 1126 | /* Have both, check_string is floating */ |
6eb5f6b9 JH |
1127 | if (t + start_shift >= check_at) /* Contradicts floating=check */ |
1128 | goto retry_floating_check; | |
1129 | /* Recheck anchored substring, but not floating... */ | |
9041c2e3 | 1130 | s = check_at; |
5e39e1e5 HS |
1131 | if (!check) |
1132 | goto giveup; | |
a3621e74 | 1133 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 1134 | "Looking for anchored substr starting at offset %ld...\n", |
6eb5f6b9 JH |
1135 | (long)(other_last - i_strpos)) ); |
1136 | goto do_other_anchored; | |
1137 | } | |
60e71179 GS |
1138 | /* Another way we could have checked stclass at the |
1139 | current position only: */ | |
1140 | if (ml_anch) { | |
1141 | s = t = t + 1; | |
5e39e1e5 HS |
1142 | if (!check) |
1143 | goto giveup; | |
a3621e74 | 1144 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 1145 | "Looking for /%s^%s/m starting at offset %ld...\n", |
e4584336 | 1146 | PL_colors[0], PL_colors[1], (long)(t - i_strpos)) ); |
60e71179 | 1147 | goto try_at_offset; |
66e933ab | 1148 | } |
f2ed9b32 | 1149 | if (!(utf8_target ? prog->float_utf8 : prog->float_substr)) /* Could have been deleted */ |
60e71179 | 1150 | goto fail; |
486ec47a | 1151 | /* Check is floating substring. */ |
6eb5f6b9 JH |
1152 | retry_floating_check: |
1153 | t = check_at - start_shift; | |
a3621e74 | 1154 | DEBUG_EXECUTE_r( what = "floating" ); |
6eb5f6b9 JH |
1155 | goto hop_and_restart; |
1156 | } | |
b7953727 | 1157 | if (t != s) { |
a3621e74 | 1158 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
6eb5f6b9 | 1159 | "By STCLASS: moving %ld --> %ld\n", |
b7953727 JH |
1160 | (long)(t - i_strpos), (long)(s - i_strpos)) |
1161 | ); | |
1162 | } | |
1163 | else { | |
a3621e74 | 1164 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
b7953727 JH |
1165 | "Does not contradict STCLASS...\n"); |
1166 | ); | |
1167 | } | |
6eb5f6b9 | 1168 | } |
5e39e1e5 | 1169 | giveup: |
a3621e74 | 1170 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n", |
5e39e1e5 HS |
1171 | PL_colors[4], (check ? "Guessed" : "Giving up"), |
1172 | PL_colors[5], (long)(s - i_strpos)) ); | |
cad2e5aa | 1173 | return s; |
2c2d71f5 JH |
1174 | |
1175 | fail_finish: /* Substring not found */ | |
33b8afdf | 1176 | if (prog->check_substr || prog->check_utf8) /* could be removed already */ |
f2ed9b32 | 1177 | BmUSEFUL(utf8_target ? prog->check_utf8 : prog->check_substr) += 5; /* hooray */ |
cad2e5aa | 1178 | fail: |
a3621e74 | 1179 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n", |
e4584336 | 1180 | PL_colors[4], PL_colors[5])); |
bd61b366 | 1181 | return NULL; |
cad2e5aa | 1182 | } |
9661b544 | 1183 | |
a0a388a1 YO |
1184 | #define DECL_TRIE_TYPE(scan) \ |
1185 | const enum { trie_plain, trie_utf8, trie_utf8_fold, trie_latin_utf8_fold } \ | |
fab2782b YO |
1186 | trie_type = ((scan->flags == EXACT) \ |
1187 | ? (utf8_target ? trie_utf8 : trie_plain) \ | |
1188 | : (utf8_target ? trie_utf8_fold : trie_latin_utf8_fold)) | |
1189 | ||
1190 | #define REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, uscan, len, \ | |
1191 | uvc, charid, foldlen, foldbuf, uniflags) STMT_START { \ | |
1192 | STRLEN skiplen; \ | |
1193 | switch (trie_type) { \ | |
1194 | case trie_utf8_fold: \ | |
1195 | if ( foldlen>0 ) { \ | |
1196 | uvc = utf8n_to_uvuni( (const U8*) uscan, UTF8_MAXLEN, &len, uniflags ); \ | |
1197 | foldlen -= len; \ | |
1198 | uscan += len; \ | |
1199 | len=0; \ | |
1200 | } else { \ | |
1201 | uvc = to_utf8_fold( (const U8*) uc, foldbuf, &foldlen ); \ | |
1202 | len = UTF8SKIP(uc); \ | |
1203 | skiplen = UNISKIP( uvc ); \ | |
1204 | foldlen -= skiplen; \ | |
1205 | uscan = foldbuf + skiplen; \ | |
1206 | } \ | |
1207 | break; \ | |
1208 | case trie_latin_utf8_fold: \ | |
1209 | if ( foldlen>0 ) { \ | |
1210 | uvc = utf8n_to_uvuni( (const U8*) uscan, UTF8_MAXLEN, &len, uniflags ); \ | |
1211 | foldlen -= len; \ | |
1212 | uscan += len; \ | |
1213 | len=0; \ | |
1214 | } else { \ | |
1215 | len = 1; \ | |
1216 | uvc = _to_fold_latin1( (U8) *uc, foldbuf, &foldlen, 1); \ | |
1217 | skiplen = UNISKIP( uvc ); \ | |
1218 | foldlen -= skiplen; \ | |
1219 | uscan = foldbuf + skiplen; \ | |
1220 | } \ | |
1221 | break; \ | |
1222 | case trie_utf8: \ | |
1223 | uvc = utf8n_to_uvuni( (const U8*) uc, UTF8_MAXLEN, &len, uniflags ); \ | |
1224 | break; \ | |
1225 | case trie_plain: \ | |
1226 | uvc = (UV)*uc; \ | |
1227 | len = 1; \ | |
1228 | } \ | |
1229 | if (uvc < 256) { \ | |
1230 | charid = trie->charmap[ uvc ]; \ | |
1231 | } \ | |
1232 | else { \ | |
1233 | charid = 0; \ | |
1234 | if (widecharmap) { \ | |
1235 | SV** const svpp = hv_fetch(widecharmap, \ | |
1236 | (char*)&uvc, sizeof(UV), 0); \ | |
1237 | if (svpp) \ | |
1238 | charid = (U16)SvIV(*svpp); \ | |
1239 | } \ | |
1240 | } \ | |
4cadc6a9 YO |
1241 | } STMT_END |
1242 | ||
4cadc6a9 YO |
1243 | #define REXEC_FBC_EXACTISH_SCAN(CoNd) \ |
1244 | STMT_START { \ | |
1245 | while (s <= e) { \ | |
1246 | if ( (CoNd) \ | |
fac1af77 | 1247 | && (ln == 1 || folder(s, pat_string, ln)) \ |
9a5a5549 | 1248 | && (!reginfo || regtry(reginfo, &s)) ) \ |
4cadc6a9 YO |
1249 | goto got_it; \ |
1250 | s++; \ | |
1251 | } \ | |
1252 | } STMT_END | |
1253 | ||
1254 | #define REXEC_FBC_UTF8_SCAN(CoDe) \ | |
1255 | STMT_START { \ | |
1256 | while (s + (uskip = UTF8SKIP(s)) <= strend) { \ | |
1257 | CoDe \ | |
1258 | s += uskip; \ | |
1259 | } \ | |
1260 | } STMT_END | |
1261 | ||
1262 | #define REXEC_FBC_SCAN(CoDe) \ | |
1263 | STMT_START { \ | |
1264 | while (s < strend) { \ | |
1265 | CoDe \ | |
1266 | s++; \ | |
1267 | } \ | |
1268 | } STMT_END | |
1269 | ||
1270 | #define REXEC_FBC_UTF8_CLASS_SCAN(CoNd) \ | |
1271 | REXEC_FBC_UTF8_SCAN( \ | |
1272 | if (CoNd) { \ | |
24b23f37 | 1273 | if (tmp && (!reginfo || regtry(reginfo, &s))) \ |
4cadc6a9 YO |
1274 | goto got_it; \ |
1275 | else \ | |
1276 | tmp = doevery; \ | |
1277 | } \ | |
1278 | else \ | |
1279 | tmp = 1; \ | |
1280 | ) | |
1281 | ||
1282 | #define REXEC_FBC_CLASS_SCAN(CoNd) \ | |
1283 | REXEC_FBC_SCAN( \ | |
1284 | if (CoNd) { \ | |
24b23f37 | 1285 | if (tmp && (!reginfo || regtry(reginfo, &s))) \ |
4cadc6a9 YO |
1286 | goto got_it; \ |
1287 | else \ | |
1288 | tmp = doevery; \ | |
1289 | } \ | |
1290 | else \ | |
1291 | tmp = 1; \ | |
1292 | ) | |
1293 | ||
1294 | #define REXEC_FBC_TRYIT \ | |
24b23f37 | 1295 | if ((!reginfo || regtry(reginfo, &s))) \ |
4cadc6a9 YO |
1296 | goto got_it |
1297 | ||
e1d1eefb | 1298 | #define REXEC_FBC_CSCAN(CoNdUtF8,CoNd) \ |
f2ed9b32 | 1299 | if (utf8_target) { \ |
e1d1eefb YO |
1300 | REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \ |
1301 | } \ | |
1302 | else { \ | |
1303 | REXEC_FBC_CLASS_SCAN(CoNd); \ | |
d981ef24 | 1304 | } |
e1d1eefb | 1305 | |
4cadc6a9 | 1306 | #define REXEC_FBC_CSCAN_PRELOAD(UtFpReLoAd,CoNdUtF8,CoNd) \ |
f2ed9b32 | 1307 | if (utf8_target) { \ |
4cadc6a9 YO |
1308 | UtFpReLoAd; \ |
1309 | REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \ | |
1310 | } \ | |
1311 | else { \ | |
1312 | REXEC_FBC_CLASS_SCAN(CoNd); \ | |
d981ef24 | 1313 | } |
4cadc6a9 YO |
1314 | |
1315 | #define REXEC_FBC_CSCAN_TAINT(CoNdUtF8,CoNd) \ | |
1316 | PL_reg_flags |= RF_tainted; \ | |
f2ed9b32 | 1317 | if (utf8_target) { \ |
4cadc6a9 YO |
1318 | REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \ |
1319 | } \ | |
1320 | else { \ | |
1321 | REXEC_FBC_CLASS_SCAN(CoNd); \ | |
d981ef24 | 1322 | } |
4cadc6a9 | 1323 | |
786e8c11 YO |
1324 | #define DUMP_EXEC_POS(li,s,doutf8) \ |
1325 | dump_exec_pos(li,s,(PL_regeol),(PL_bostr),(PL_reg_starttry),doutf8) | |
1326 | ||
cfaf538b KW |
1327 | |
1328 | #define UTF8_NOLOAD(TEST_NON_UTF8, IF_SUCCESS, IF_FAIL) \ | |
1329 | tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n'; \ | |
1330 | tmp = TEST_NON_UTF8(tmp); \ | |
1331 | REXEC_FBC_UTF8_SCAN( \ | |
1332 | if (tmp == ! TEST_NON_UTF8((U8) *s)) { \ | |
1333 | tmp = !tmp; \ | |
1334 | IF_SUCCESS; \ | |
1335 | } \ | |
1336 | else { \ | |
1337 | IF_FAIL; \ | |
1338 | } \ | |
1339 | ); \ | |
1340 | ||
1341 | #define UTF8_LOAD(TeSt1_UtF8, TeSt2_UtF8, IF_SUCCESS, IF_FAIL) \ | |
1342 | if (s == PL_bostr) { \ | |
1343 | tmp = '\n'; \ | |
1344 | } \ | |
1345 | else { \ | |
1346 | U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr); \ | |
1347 | tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT); \ | |
1348 | } \ | |
1349 | tmp = TeSt1_UtF8; \ | |
1350 | LOAD_UTF8_CHARCLASS_ALNUM(); \ | |
1351 | REXEC_FBC_UTF8_SCAN( \ | |
1352 | if (tmp == ! (TeSt2_UtF8)) { \ | |
1353 | tmp = !tmp; \ | |
1354 | IF_SUCCESS; \ | |
1355 | } \ | |
1356 | else { \ | |
1357 | IF_FAIL; \ | |
1358 | } \ | |
1359 | ); \ | |
1360 | ||
63ac0dad KW |
1361 | /* The only difference between the BOUND and NBOUND cases is that |
1362 | * REXEC_FBC_TRYIT is called when matched in BOUND, and when non-matched in | |
1363 | * NBOUND. This is accomplished by passing it in either the if or else clause, | |
1364 | * with the other one being empty */ | |
1365 | #define FBC_BOUND(TEST_NON_UTF8, TEST1_UTF8, TEST2_UTF8) \ | |
1dcf4a1b | 1366 | FBC_BOUND_COMMON(UTF8_LOAD(TEST1_UTF8, TEST2_UTF8, REXEC_FBC_TRYIT, PLACEHOLDER), TEST_NON_UTF8, REXEC_FBC_TRYIT, PLACEHOLDER) |
cfaf538b KW |
1367 | |
1368 | #define FBC_BOUND_NOLOAD(TEST_NON_UTF8, TEST1_UTF8, TEST2_UTF8) \ | |
1dcf4a1b | 1369 | FBC_BOUND_COMMON(UTF8_NOLOAD(TEST_NON_UTF8, REXEC_FBC_TRYIT, PLACEHOLDER), TEST_NON_UTF8, REXEC_FBC_TRYIT, PLACEHOLDER) |
63ac0dad KW |
1370 | |
1371 | #define FBC_NBOUND(TEST_NON_UTF8, TEST1_UTF8, TEST2_UTF8) \ | |
1dcf4a1b | 1372 | FBC_BOUND_COMMON(UTF8_LOAD(TEST1_UTF8, TEST2_UTF8, PLACEHOLDER, REXEC_FBC_TRYIT), TEST_NON_UTF8, PLACEHOLDER, REXEC_FBC_TRYIT) |
cfaf538b KW |
1373 | |
1374 | #define FBC_NBOUND_NOLOAD(TEST_NON_UTF8, TEST1_UTF8, TEST2_UTF8) \ | |
1dcf4a1b | 1375 | FBC_BOUND_COMMON(UTF8_NOLOAD(TEST_NON_UTF8, PLACEHOLDER, REXEC_FBC_TRYIT), TEST_NON_UTF8, PLACEHOLDER, REXEC_FBC_TRYIT) |
cfaf538b | 1376 | |
63ac0dad KW |
1377 | |
1378 | /* Common to the BOUND and NBOUND cases. Unfortunately the UTF8 tests need to | |
1379 | * be passed in completely with the variable name being tested, which isn't | |
1380 | * such a clean interface, but this is easier to read than it was before. We | |
1381 | * are looking for the boundary (or non-boundary between a word and non-word | |
1382 | * character. The utf8 and non-utf8 cases have the same logic, but the details | |
1383 | * must be different. Find the "wordness" of the character just prior to this | |
1384 | * one, and compare it with the wordness of this one. If they differ, we have | |
1385 | * a boundary. At the beginning of the string, pretend that the previous | |
1386 | * character was a new-line */ | |
cfaf538b | 1387 | #define FBC_BOUND_COMMON(UTF8_CODE, TEST_NON_UTF8, IF_SUCCESS, IF_FAIL) \ |
63ac0dad | 1388 | if (utf8_target) { \ |
cfaf538b | 1389 | UTF8_CODE \ |
63ac0dad KW |
1390 | } \ |
1391 | else { /* Not utf8 */ \ | |
1392 | tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n'; \ | |
1393 | tmp = TEST_NON_UTF8(tmp); \ | |
1394 | REXEC_FBC_SCAN( \ | |
1395 | if (tmp == ! TEST_NON_UTF8((U8) *s)) { \ | |
1396 | tmp = !tmp; \ | |
1397 | IF_SUCCESS; \ | |
1398 | } \ | |
1399 | else { \ | |
1400 | IF_FAIL; \ | |
1401 | } \ | |
1402 | ); \ | |
1403 | } \ | |
1404 | if ((!prog->minlen && tmp) && (!reginfo || regtry(reginfo, &s))) \ | |
1405 | goto got_it; | |
1406 | ||
786e8c11 YO |
1407 | /* We know what class REx starts with. Try to find this position... */ |
1408 | /* if reginfo is NULL, its a dryrun */ | |
1409 | /* annoyingly all the vars in this routine have different names from their counterparts | |
1410 | in regmatch. /grrr */ | |
1411 | ||
3c3eec57 | 1412 | STATIC char * |
07be1b83 | 1413 | S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s, |
24b23f37 | 1414 | const char *strend, regmatch_info *reginfo) |
a687059c | 1415 | { |
27da23d5 | 1416 | dVAR; |
bbe252da | 1417 | const I32 doevery = (prog->intflags & PREGf_SKIP) == 0; |
fac1af77 KW |
1418 | char *pat_string; /* The pattern's exactish string */ |
1419 | char *pat_end; /* ptr to end char of pat_string */ | |
1420 | re_fold_t folder; /* Function for computing non-utf8 folds */ | |
1421 | const U8 *fold_array; /* array for folding ords < 256 */ | |
d8093b23 | 1422 | STRLEN ln; |
5dab1207 | 1423 | STRLEN lnc; |
eb578fdb | 1424 | STRLEN uskip; |
fac1af77 KW |
1425 | U8 c1; |
1426 | U8 c2; | |
6eb5f6b9 | 1427 | char *e; |
eb578fdb KW |
1428 | I32 tmp = 1; /* Scratch variable? */ |
1429 | const bool utf8_target = PL_reg_match_utf8; | |
453bfd44 | 1430 | UV utf8_fold_flags = 0; |
f8fc2ecf | 1431 | RXi_GET_DECL(prog,progi); |
7918f24d NC |
1432 | |
1433 | PERL_ARGS_ASSERT_FIND_BYCLASS; | |
f8fc2ecf | 1434 | |
6eb5f6b9 JH |
1435 | /* We know what class it must start with. */ |
1436 | switch (OP(c)) { | |
f56b6394 | 1437 | case ANYOFV: |
6eb5f6b9 | 1438 | case ANYOF: |
f56b6394 | 1439 | if (utf8_target || OP(c) == ANYOFV) { |
b1e3e569 KW |
1440 | STRLEN inclasslen = strend - s; |
1441 | REXEC_FBC_UTF8_CLASS_SCAN( | |
1442 | reginclass(prog, c, (U8*)s, &inclasslen, utf8_target)); | |
388cc4de HS |
1443 | } |
1444 | else { | |
6ef69d56 | 1445 | REXEC_FBC_CLASS_SCAN(REGINCLASS(prog, c, (U8*)s)); |
a0d0e21e | 1446 | } |
6eb5f6b9 | 1447 | break; |
f33976b4 | 1448 | case CANY: |
4cadc6a9 | 1449 | REXEC_FBC_SCAN( |
24b23f37 | 1450 | if (tmp && (!reginfo || regtry(reginfo, &s))) |
f33976b4 DB |
1451 | goto got_it; |
1452 | else | |
1453 | tmp = doevery; | |
4cadc6a9 | 1454 | ); |
f33976b4 | 1455 | break; |
2f7f8cb1 KW |
1456 | |
1457 | case EXACTFA: | |
1458 | if (UTF_PATTERN || utf8_target) { | |
1459 | utf8_fold_flags = FOLDEQ_UTF8_NOMIX_ASCII; | |
1460 | goto do_exactf_utf8; | |
1461 | } | |
1462 | fold_array = PL_fold_latin1; /* Latin1 folds are not affected by */ | |
1463 | folder = foldEQ_latin1; /* /a, except the sharp s one which */ | |
1464 | goto do_exactf_non_utf8; /* isn't dealt with by these */ | |
1465 | ||
6eb5f6b9 | 1466 | case EXACTF: |
62bf7766 | 1467 | if (utf8_target) { |
77a6d856 KW |
1468 | |
1469 | /* regcomp.c already folded this if pattern is in UTF-8 */ | |
62bf7766 | 1470 | utf8_fold_flags = 0; |
fac1af77 KW |
1471 | goto do_exactf_utf8; |
1472 | } | |
1473 | fold_array = PL_fold; | |
1474 | folder = foldEQ; | |
1475 | goto do_exactf_non_utf8; | |
1476 | ||
1477 | case EXACTFL: | |
1478 | if (UTF_PATTERN || utf8_target) { | |
17580e7a | 1479 | utf8_fold_flags = FOLDEQ_UTF8_LOCALE; |
fac1af77 KW |
1480 | goto do_exactf_utf8; |
1481 | } | |
1482 | fold_array = PL_fold_locale; | |
1483 | folder = foldEQ_locale; | |
16d951b7 KW |
1484 | goto do_exactf_non_utf8; |
1485 | ||
3c760661 KW |
1486 | case EXACTFU_SS: |
1487 | if (UTF_PATTERN) { | |
1488 | utf8_fold_flags = FOLDEQ_S2_ALREADY_FOLDED; | |
1489 | } | |
1490 | goto do_exactf_utf8; | |
1491 | ||
fab2782b | 1492 | case EXACTFU_TRICKYFOLD: |
16d951b7 KW |
1493 | case EXACTFU: |
1494 | if (UTF_PATTERN || utf8_target) { | |
77a6d856 | 1495 | utf8_fold_flags = (UTF_PATTERN) ? FOLDEQ_S2_ALREADY_FOLDED : 0; |
16d951b7 KW |
1496 | goto do_exactf_utf8; |
1497 | } | |
1498 | ||
1499 | /* Any 'ss' in the pattern should have been replaced by regcomp, | |
1500 | * so we don't have to worry here about this single special case | |
1501 | * in the Latin1 range */ | |
1502 | fold_array = PL_fold_latin1; | |
1503 | folder = foldEQ_latin1; | |
fac1af77 KW |
1504 | |
1505 | /* FALL THROUGH */ | |
1506 | ||
62bf7766 KW |
1507 | do_exactf_non_utf8: /* Neither pattern nor string are UTF8, and there |
1508 | are no glitches with fold-length differences | |
1509 | between the target string and pattern */ | |
fac1af77 KW |
1510 | |
1511 | /* The idea in the non-utf8 EXACTF* cases is to first find the | |
1512 | * first character of the EXACTF* node and then, if necessary, | |
1513 | * case-insensitively compare the full text of the node. c1 is the | |
1514 | * first character. c2 is its fold. This logic will not work for | |
1515 | * Unicode semantics and the german sharp ss, which hence should | |
1516 | * not be compiled into a node that gets here. */ | |
1517 | pat_string = STRING(c); | |
1518 | ln = STR_LEN(c); /* length to match in octets/bytes */ | |
1519 | ||
8a90a8fe KW |
1520 | /* We know that we have to match at least 'ln' bytes (which is the |
1521 | * same as characters, since not utf8). If we have to match 3 | |
1522 | * characters, and there are only 2 availabe, we know without | |
1523 | * trying that it will fail; so don't start a match past the | |
1524 | * required minimum number from the far end */ | |
fac1af77 KW |
1525 | e = HOP3c(strend, -((I32)ln), s); |
1526 | ||
1527 | if (!reginfo && e < s) { | |
1528 | e = s; /* Due to minlen logic of intuit() */ | |
1529 | } | |
1530 | ||
1531 | c1 = *pat_string; | |
1532 | c2 = fold_array[c1]; | |
1533 | if (c1 == c2) { /* If char and fold are the same */ | |
1534 | REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1); | |
1535 | } | |
1536 | else { | |
1537 | REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1 || *(U8*)s == c2); | |
1538 | } | |
1539 | break; | |
1540 | ||
1541 | do_exactf_utf8: | |
e067297c KW |
1542 | { |
1543 | unsigned expansion; | |
1544 | ||
fac1af77 KW |
1545 | |
1546 | /* If one of the operands is in utf8, we can't use the simpler | |
1547 | * folding above, due to the fact that many different characters | |
1548 | * can have the same fold, or portion of a fold, or different- | |
1549 | * length fold */ | |
1550 | pat_string = STRING(c); | |
1551 | ln = STR_LEN(c); /* length to match in octets/bytes */ | |
1552 | pat_end = pat_string + ln; | |
1553 | lnc = (UTF_PATTERN) /* length to match in characters */ | |
1554 | ? utf8_length((U8 *) pat_string, (U8 *) pat_end) | |
1555 | : ln; | |
1556 | ||
e067297c KW |
1557 | /* We have 'lnc' characters to match in the pattern, but because of |
1558 | * multi-character folding, each character in the target can match | |
1559 | * up to 3 characters (Unicode guarantees it will never exceed | |
1560 | * this) if it is utf8-encoded; and up to 2 if not (based on the | |
1561 | * fact that the Latin 1 folds are already determined, and the | |
1562 | * only multi-char fold in that range is the sharp-s folding to | |
1563 | * 'ss'. Thus, a pattern character can match as little as 1/3 of a | |
89378d8a KW |
1564 | * string character. Adjust lnc accordingly, rounding up, so that |
1565 | * if we need to match at least 4+1/3 chars, that really is 5. */ | |
e067297c | 1566 | expansion = (utf8_target) ? UTF8_MAX_FOLD_CHAR_EXPAND : 2; |
89378d8a | 1567 | lnc = (lnc + expansion - 1) / expansion; |
e067297c KW |
1568 | |
1569 | /* As in the non-UTF8 case, if we have to match 3 characters, and | |
1570 | * only 2 are left, it's guaranteed to fail, so don't start a | |
1571 | * match that would require us to go beyond the end of the string | |
1572 | */ | |
1573 | e = HOP3c(strend, -((I32)lnc), s); | |
fac1af77 KW |
1574 | |
1575 | if (!reginfo && e < s) { | |
1576 | e = s; /* Due to minlen logic of intuit() */ | |
1577 | } | |
1578 | ||
b33105db KW |
1579 | /* XXX Note that we could recalculate e to stop the loop earlier, |
1580 | * as the worst case expansion above will rarely be met, and as we | |
1581 | * go along we would usually find that e moves further to the left. | |
1582 | * This would happen only after we reached the point in the loop | |
1583 | * where if there were no expansion we should fail. Unclear if | |
1584 | * worth the expense */ | |
e067297c | 1585 | |
fac1af77 KW |
1586 | while (s <= e) { |
1587 | char *my_strend= (char *)strend; | |
1588 | if (foldEQ_utf8_flags(s, &my_strend, 0, utf8_target, | |
1589 | pat_string, NULL, ln, cBOOL(UTF_PATTERN), utf8_fold_flags) | |
1590 | && (!reginfo || regtry(reginfo, &s)) ) | |
1591 | { | |
1592 | goto got_it; | |
1593 | } | |
bbdd8bad | 1594 | s += (utf8_target) ? UTF8SKIP(s) : 1; |
fac1af77 KW |
1595 | } |
1596 | break; | |
e067297c | 1597 | } |
bbce6d69 | 1598 | case BOUNDL: |
3280af22 | 1599 | PL_reg_flags |= RF_tainted; |
63ac0dad KW |
1600 | FBC_BOUND(isALNUM_LC, |
1601 | isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp)), | |
1602 | isALNUM_LC_utf8((U8*)s)); | |
a0ed51b3 | 1603 | break; |
bbce6d69 | 1604 | case NBOUNDL: |
3280af22 | 1605 | PL_reg_flags |= RF_tainted; |
63ac0dad KW |
1606 | FBC_NBOUND(isALNUM_LC, |
1607 | isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp)), | |
1608 | isALNUM_LC_utf8((U8*)s)); | |
1609 | break; | |
1610 | case BOUND: | |
1611 | FBC_BOUND(isWORDCHAR, | |
1612 | isALNUM_uni(tmp), | |
1613 | cBOOL(swash_fetch(PL_utf8_alnum, (U8*)s, utf8_target))); | |
1614 | break; | |
cfaf538b KW |
1615 | case BOUNDA: |
1616 | FBC_BOUND_NOLOAD(isWORDCHAR_A, | |
1617 | isWORDCHAR_A(tmp), | |
1618 | isWORDCHAR_A((U8*)s)); | |
1619 | break; | |
a0d0e21e | 1620 | case NBOUND: |
63ac0dad KW |
1621 | FBC_NBOUND(isWORDCHAR, |
1622 | isALNUM_uni(tmp), | |
1623 | cBOOL(swash_fetch(PL_utf8_alnum, (U8*)s, utf8_target))); | |
1624 | break; | |
cfaf538b KW |
1625 | case NBOUNDA: |
1626 | FBC_NBOUND_NOLOAD(isWORDCHAR_A, | |
1627 | isWORDCHAR_A(tmp), | |
1628 | isWORDCHAR_A((U8*)s)); | |
1629 | break; | |
63ac0dad KW |
1630 | case BOUNDU: |
1631 | FBC_BOUND(isWORDCHAR_L1, | |
1632 | isALNUM_uni(tmp), | |
1633 | cBOOL(swash_fetch(PL_utf8_alnum, (U8*)s, utf8_target))); | |
1634 | break; | |
1635 | case NBOUNDU: | |
1636 | FBC_NBOUND(isWORDCHAR_L1, | |
1637 | isALNUM_uni(tmp), | |
1638 | cBOOL(swash_fetch(PL_utf8_alnum, (U8*)s, utf8_target))); | |
a0ed51b3 | 1639 | break; |
bbce6d69 | 1640 | case ALNUML: |
4cadc6a9 YO |
1641 | REXEC_FBC_CSCAN_TAINT( |
1642 | isALNUM_LC_utf8((U8*)s), | |
1643 | isALNUM_LC(*s) | |
1644 | ); | |
6895a8aa | 1645 | break; |
980866de KW |
1646 | case ALNUMU: |
1647 | REXEC_FBC_CSCAN_PRELOAD( | |
779d7b58 KW |
1648 | LOAD_UTF8_CHARCLASS_ALNUM(), |
1649 | swash_fetch(PL_utf8_alnum,(U8*)s, utf8_target), | |
980866de KW |
1650 | isWORDCHAR_L1((U8) *s) |
1651 | ); | |
6895a8aa | 1652 | break; |
980866de KW |
1653 | case ALNUM: |
1654 | REXEC_FBC_CSCAN_PRELOAD( | |
779d7b58 KW |
1655 | LOAD_UTF8_CHARCLASS_ALNUM(), |
1656 | swash_fetch(PL_utf8_alnum,(U8*)s, utf8_target), | |
980866de KW |
1657 | isWORDCHAR((U8) *s) |
1658 | ); | |
6895a8aa | 1659 | break; |
cfaf538b | 1660 | case ALNUMA: |
8e9da4d4 KW |
1661 | /* Don't need to worry about utf8, as it can match only a single |
1662 | * byte invariant character */ | |
cfaf538b | 1663 | REXEC_FBC_CLASS_SCAN( isWORDCHAR_A(*s)); |
6895a8aa | 1664 | break; |
980866de KW |
1665 | case NALNUMU: |
1666 | REXEC_FBC_CSCAN_PRELOAD( | |
779d7b58 | 1667 | LOAD_UTF8_CHARCLASS_ALNUM(), |
359960d4 | 1668 | !swash_fetch(PL_utf8_alnum,(U8*)s, utf8_target), |
980866de KW |
1669 | ! isWORDCHAR_L1((U8) *s) |
1670 | ); | |
6895a8aa | 1671 | break; |
a0d0e21e | 1672 | case NALNUM: |
4cadc6a9 | 1673 | REXEC_FBC_CSCAN_PRELOAD( |
779d7b58 KW |
1674 | LOAD_UTF8_CHARCLASS_ALNUM(), |
1675 | !swash_fetch(PL_utf8_alnum, (U8*)s, utf8_target), | |
980866de | 1676 | ! isALNUM(*s) |
4cadc6a9 | 1677 | ); |
6895a8aa | 1678 | break; |
cfaf538b | 1679 | case NALNUMA: |
8e9da4d4 KW |
1680 | REXEC_FBC_CSCAN( |
1681 | !isWORDCHAR_A(*s), | |
1682 | !isWORDCHAR_A(*s) | |
1683 | ); | |
1684 | break; | |
bbce6d69 | 1685 | case NALNUML: |
4cadc6a9 YO |
1686 | REXEC_FBC_CSCAN_TAINT( |
1687 | !isALNUM_LC_utf8((U8*)s), | |
1688 | !isALNUM_LC(*s) | |
1689 | ); | |
6895a8aa | 1690 | break; |
980866de KW |
1691 | case SPACEU: |
1692 | REXEC_FBC_CSCAN_PRELOAD( | |
779d7b58 KW |
1693 | LOAD_UTF8_CHARCLASS_SPACE(), |
1694 | *s == ' ' || swash_fetch(PL_utf8_space,(U8*)s, utf8_target), | |
980866de KW |
1695 | isSPACE_L1((U8) *s) |
1696 | ); | |
6895a8aa | 1697 | break; |
a0d0e21e | 1698 | case SPACE: |
4cadc6a9 | 1699 | REXEC_FBC_CSCAN_PRELOAD( |
779d7b58 KW |
1700 | LOAD_UTF8_CHARCLASS_SPACE(), |
1701 | *s == ' ' || swash_fetch(PL_utf8_space,(U8*)s, utf8_target), | |
980866de | 1702 | isSPACE((U8) *s) |
4cadc6a9 | 1703 | ); |
6895a8aa | 1704 | break; |
cfaf538b | 1705 | case SPACEA: |
8e9da4d4 KW |
1706 | /* Don't need to worry about utf8, as it can match only a single |
1707 | * byte invariant character */ | |
cfaf538b | 1708 | REXEC_FBC_CLASS_SCAN( isSPACE_A(*s)); |
6895a8aa | 1709 | break; |
bbce6d69 | 1710 | case SPACEL: |
4cadc6a9 | 1711 | REXEC_FBC_CSCAN_TAINT( |
6bbba904 | 1712 | isSPACE_LC_utf8((U8*)s), |
4cadc6a9 YO |
1713 | isSPACE_LC(*s) |
1714 | ); | |
6895a8aa | 1715 | break; |
980866de KW |
1716 | case NSPACEU: |
1717 | REXEC_FBC_CSCAN_PRELOAD( | |
779d7b58 KW |
1718 | LOAD_UTF8_CHARCLASS_SPACE(), |
1719 | !( *s == ' ' || swash_fetch(PL_utf8_space,(U8*)s, utf8_target)), | |
980866de KW |
1720 | ! isSPACE_L1((U8) *s) |
1721 | ); | |
6895a8aa | 1722 | break; |
a0d0e21e | 1723 | case NSPACE: |
4cadc6a9 | 1724 | REXEC_FBC_CSCAN_PRELOAD( |
779d7b58 KW |
1725 | LOAD_UTF8_CHARCLASS_SPACE(), |
1726 | !(*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s, utf8_target)), | |
980866de | 1727 | ! isSPACE((U8) *s) |
4cadc6a9 | 1728 | ); |
6895a8aa | 1729 | break; |
cfaf538b | 1730 | case NSPACEA: |
8e9da4d4 KW |
1731 | REXEC_FBC_CSCAN( |
1732 | !isSPACE_A(*s), | |
1733 | !isSPACE_A(*s) | |
1734 | ); | |
1735 | break; | |
bbce6d69 | 1736 | case NSPACEL: |
4cadc6a9 | 1737 | REXEC_FBC_CSCAN_TAINT( |
6bbba904 | 1738 | !isSPACE_LC_utf8((U8*)s), |
4cadc6a9 YO |
1739 | !isSPACE_LC(*s) |
1740 | ); | |
6895a8aa | 1741 | break; |
a0d0e21e | 1742 | case DIGIT: |
4cadc6a9 | 1743 | REXEC_FBC_CSCAN_PRELOAD( |
779d7b58 KW |
1744 | LOAD_UTF8_CHARCLASS_DIGIT(), |
1745 | swash_fetch(PL_utf8_digit,(U8*)s, utf8_target), | |
4cadc6a9 YO |
1746 | isDIGIT(*s) |
1747 | ); | |
6895a8aa | 1748 | break; |
cfaf538b | 1749 | case DIGITA: |
8e9da4d4 KW |
1750 | /* Don't need to worry about utf8, as it can match only a single |
1751 | * byte invariant character */ | |
cfaf538b | 1752 | REXEC_FBC_CLASS_SCAN( isDIGIT_A(*s)); |
6895a8aa | 1753 | break; |
b8c5462f | 1754 | case DIGITL: |
4cadc6a9 YO |
1755 | REXEC_FBC_CSCAN_TAINT( |
1756 | isDIGIT_LC_utf8((U8*)s), | |
1757 | isDIGIT_LC(*s) | |
1758 | ); | |
6895a8aa | 1759 | break; |
a0d0e21e | 1760 | case NDIGIT: |
4cadc6a9 | 1761 | REXEC_FBC_CSCAN_PRELOAD( |
779d7b58 KW |
1762 | LOAD_UTF8_CHARCLASS_DIGIT(), |
1763 | !swash_fetch(PL_utf8_digit,(U8*)s, utf8_target), | |
4cadc6a9 YO |
1764 | !isDIGIT(*s) |
1765 | ); | |
6895a8aa | 1766 | break; |
cfaf538b | 1767 | case NDIGITA: |
8e9da4d4 KW |
1768 | REXEC_FBC_CSCAN( |
1769 | !isDIGIT_A(*s), | |
1770 | !isDIGIT_A(*s) | |
1771 | ); | |
1772 | break; | |
b8c5462f | 1773 | case NDIGITL: |
4cadc6a9 YO |
1774 | REXEC_FBC_CSCAN_TAINT( |
1775 | !isDIGIT_LC_utf8((U8*)s), | |
1776 | !isDIGIT_LC(*s) | |
1777 | ); | |
6895a8aa | 1778 | break; |
e1d1eefb YO |
1779 | case LNBREAK: |
1780 | REXEC_FBC_CSCAN( | |
1781 | is_LNBREAK_utf8(s), | |
1782 | is_LNBREAK_latin1(s) | |
1783 | ); | |
6895a8aa | 1784 | break; |
e1d1eefb YO |
1785 | case VERTWS: |
1786 | REXEC_FBC_CSCAN( | |
1787 | is_VERTWS_utf8(s), | |
1788 | is_VERTWS_latin1(s) | |
1789 | ); | |
6895a8aa | 1790 | break; |
e1d1eefb YO |
1791 | case NVERTWS: |
1792 | REXEC_FBC_CSCAN( | |
1793 | !is_VERTWS_utf8(s), | |
1794 | !is_VERTWS_latin1(s) | |
1795 | ); | |
6895a8aa | 1796 | break; |
e1d1eefb YO |
1797 | case HORIZWS: |
1798 | REXEC_FBC_CSCAN( | |
1799 | is_HORIZWS_utf8(s), | |
1800 | is_HORIZWS_latin1(s) | |
1801 | ); | |
6895a8aa | 1802 | break; |
e1d1eefb YO |
1803 | case NHORIZWS: |
1804 | REXEC_FBC_CSCAN( | |
1805 | !is_HORIZWS_utf8(s), | |
1806 | !is_HORIZWS_latin1(s) | |
1807 | ); | |
6895a8aa | 1808 | break; |
0658cdde KW |
1809 | case POSIXA: |
1810 | /* Don't need to worry about utf8, as it can match only a single | |
1811 | * byte invariant character. The flag in this node type is the | |
1812 | * class number to pass to _generic_isCC() to build a mask for | |
1813 | * searching in PL_charclass[] */ | |
1814 | REXEC_FBC_CLASS_SCAN( _generic_isCC_A(*s, FLAGS(c))); | |
1815 | break; | |
1816 | case NPOSIXA: | |
1817 | REXEC_FBC_CSCAN( | |
1818 | !_generic_isCC_A(*s, FLAGS(c)), | |
1819 | !_generic_isCC_A(*s, FLAGS(c)) | |
1820 | ); | |
1821 | break; | |
1822 | ||
1de06328 YO |
1823 | case AHOCORASICKC: |
1824 | case AHOCORASICK: | |
07be1b83 | 1825 | { |
a0a388a1 | 1826 | DECL_TRIE_TYPE(c); |
07be1b83 YO |
1827 | /* what trie are we using right now */ |
1828 | reg_ac_data *aho | |
f8fc2ecf | 1829 | = (reg_ac_data*)progi->data->data[ ARG( c ) ]; |
3251b653 NC |
1830 | reg_trie_data *trie |
1831 | = (reg_trie_data*)progi->data->data[ aho->trie ]; | |
85fbaab2 | 1832 | HV *widecharmap = MUTABLE_HV(progi->data->data[ aho->trie + 1 ]); |
07be1b83 YO |
1833 | |
1834 | const char *last_start = strend - trie->minlen; | |
6148ee25 | 1835 | #ifdef DEBUGGING |
07be1b83 | 1836 | const char *real_start = s; |
6148ee25 | 1837 | #endif |
07be1b83 | 1838 | STRLEN maxlen = trie->maxlen; |
be8e71aa YO |
1839 | SV *sv_points; |
1840 | U8 **points; /* map of where we were in the input string | |
786e8c11 | 1841 | when reading a given char. For ASCII this |
be8e71aa | 1842 | is unnecessary overhead as the relationship |
38a44b82 NC |
1843 | is always 1:1, but for Unicode, especially |
1844 | case folded Unicode this is not true. */ | |
f9e705e8 | 1845 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; |
786e8c11 YO |
1846 | U8 *bitmap=NULL; |
1847 | ||
07be1b83 YO |
1848 | |
1849 | GET_RE_DEBUG_FLAGS_DECL; | |
1850 | ||
be8e71aa YO |
1851 | /* We can't just allocate points here. We need to wrap it in |
1852 | * an SV so it gets freed properly if there is a croak while | |
1853 | * running the match */ | |
1854 | ENTER; | |
1855 | SAVETMPS; | |
1856 | sv_points=newSV(maxlen * sizeof(U8 *)); | |
1857 | SvCUR_set(sv_points, | |
1858 | maxlen * sizeof(U8 *)); | |
1859 | SvPOK_on(sv_points); | |
1860 | sv_2mortal(sv_points); | |
1861 | points=(U8**)SvPV_nolen(sv_points ); | |
1de06328 YO |
1862 | if ( trie_type != trie_utf8_fold |
1863 | && (trie->bitmap || OP(c)==AHOCORASICKC) ) | |
1864 | { | |
786e8c11 YO |
1865 | if (trie->bitmap) |
1866 | bitmap=(U8*)trie->bitmap; | |
1867 | else | |
1868 | bitmap=(U8*)ANYOF_BITMAP(c); | |
07be1b83 | 1869 | } |
786e8c11 YO |
1870 | /* this is the Aho-Corasick algorithm modified a touch |
1871 | to include special handling for long "unknown char" | |
1872 | sequences. The basic idea being that we use AC as long | |
1873 | as we are dealing with a possible matching char, when | |
1874 | we encounter an unknown char (and we have not encountered | |
1875 | an accepting state) we scan forward until we find a legal | |
1876 | starting char. | |
1877 | AC matching is basically that of trie matching, except | |
1878 | that when we encounter a failing transition, we fall back | |
1879 | to the current states "fail state", and try the current char | |
1880 | again, a process we repeat until we reach the root state, | |
1881 | state 1, or a legal transition. If we fail on the root state | |
1882 | then we can either terminate if we have reached an accepting | |
1883 | state previously, or restart the entire process from the beginning | |
1884 | if we have not. | |
1885 | ||
1886 | */ | |
07be1b83 YO |
1887 | while (s <= last_start) { |
1888 | const U32 uniflags = UTF8_ALLOW_DEFAULT; | |
1889 | U8 *uc = (U8*)s; | |
1890 | U16 charid = 0; | |
1891 | U32 base = 1; | |
1892 | U32 state = 1; | |
1893 | UV uvc = 0; | |
1894 | STRLEN len = 0; | |
1895 | STRLEN foldlen = 0; | |
1896 | U8 *uscan = (U8*)NULL; | |
1897 | U8 *leftmost = NULL; | |
786e8c11 YO |
1898 | #ifdef DEBUGGING |
1899 | U32 accepted_word= 0; | |
1900 | #endif | |
07be1b83 YO |
1901 | U32 pointpos = 0; |
1902 | ||
1903 | while ( state && uc <= (U8*)strend ) { | |
1904 | int failed=0; | |
786e8c11 YO |
1905 | U32 word = aho->states[ state ].wordnum; |
1906 | ||
1de06328 YO |
1907 | if( state==1 ) { |
1908 | if ( bitmap ) { | |
1909 | DEBUG_TRIE_EXECUTE_r( | |
1910 | if ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) { | |
1911 | dump_exec_pos( (char *)uc, c, strend, real_start, | |
f2ed9b32 | 1912 | (char *)uc, utf8_target ); |
1de06328 YO |
1913 | PerlIO_printf( Perl_debug_log, |
1914 | " Scanning for legal start char...\n"); | |
1915 | } | |
d085b490 YO |
1916 | ); |
1917 | if (utf8_target) { | |
1918 | while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) { | |
1919 | uc += UTF8SKIP(uc); | |
1920 | } | |
1921 | } else { | |
1922 | while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) { | |
1923 | uc++; | |
1924 | } | |
1925 | } | |
1de06328 | 1926 | s= (char *)uc; |
786e8c11 | 1927 | } |
786e8c11 YO |
1928 | if (uc >(U8*)last_start) break; |
1929 | } | |
1930 | ||
1931 | if ( word ) { | |
2e64971a | 1932 | U8 *lpos= points[ (pointpos - trie->wordinfo[word].len) % maxlen ]; |
786e8c11 YO |
1933 | if (!leftmost || lpos < leftmost) { |
1934 | DEBUG_r(accepted_word=word); | |
07be1b83 | 1935 | leftmost= lpos; |
786e8c11 | 1936 | } |
07be1b83 | 1937 | if (base==0) break; |
786e8c11 | 1938 | |
07be1b83 YO |
1939 | } |
1940 | points[pointpos++ % maxlen]= uc; | |
55eed653 NC |
1941 | REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, |
1942 | uscan, len, uvc, charid, foldlen, | |
1943 | foldbuf, uniflags); | |
786e8c11 YO |
1944 | DEBUG_TRIE_EXECUTE_r({ |
1945 | dump_exec_pos( (char *)uc, c, strend, real_start, | |
f2ed9b32 | 1946 | s, utf8_target ); |
07be1b83 | 1947 | PerlIO_printf(Perl_debug_log, |
786e8c11 YO |
1948 | " Charid:%3u CP:%4"UVxf" ", |
1949 | charid, uvc); | |
1950 | }); | |
07be1b83 YO |
1951 | |
1952 | do { | |
6148ee25 | 1953 | #ifdef DEBUGGING |
786e8c11 | 1954 | word = aho->states[ state ].wordnum; |
6148ee25 | 1955 | #endif |
07be1b83 YO |
1956 | base = aho->states[ state ].trans.base; |
1957 | ||
786e8c11 YO |
1958 | DEBUG_TRIE_EXECUTE_r({ |
1959 | if (failed) | |
1960 | dump_exec_pos( (char *)uc, c, strend, real_start, | |
f2ed9b32 | 1961 | s, utf8_target ); |
07be1b83 | 1962 | PerlIO_printf( Perl_debug_log, |
786e8c11 YO |
1963 | "%sState: %4"UVxf", word=%"UVxf, |
1964 | failed ? " Fail transition to " : "", | |
1965 | (UV)state, (UV)word); | |
1966 | }); | |
07be1b83 YO |
1967 | if ( base ) { |
1968 | U32 tmp; | |
6dd2be57 | 1969 | I32 offset; |
07be1b83 | 1970 | if (charid && |
6dd2be57 DM |
1971 | ( ((offset = base + charid |
1972 | - 1 - trie->uniquecharcount)) >= 0) | |
1973 | && ((U32)offset < trie->lasttrans) | |
1974 | && trie->trans[offset].check == state | |
1975 | && (tmp=trie->trans[offset].next)) | |
07be1b83 | 1976 | { |
786e8c11 YO |
1977 | DEBUG_TRIE_EXECUTE_r( |
1978 | PerlIO_printf( Perl_debug_log," - legal\n")); | |
07be1b83 YO |
1979 | state = tmp; |
1980 | break; | |
1981 | } | |
1982 | else { | |
786e8c11 YO |
1983 | DEBUG_TRIE_EXECUTE_r( |
1984 | PerlIO_printf( Perl_debug_log," - fail\n")); | |
1985 | failed = 1; | |
1986 | state = aho->fail[state]; | |
07be1b83 YO |
1987 | } |
1988 | } | |
1989 | else { | |
1990 | /* we must be accepting here */ | |
786e8c11 YO |
1991 | DEBUG_TRIE_EXECUTE_r( |
1992 | PerlIO_printf( Perl_debug_log," - accepting\n")); | |
1993 | failed = 1; | |
07be1b83 YO |
1994 | break; |
1995 | } | |
1996 | } while(state); | |
786e8c11 | 1997 | uc += len; |
07be1b83 YO |
1998 | if (failed) { |
1999 | if (leftmost) | |
2000 | break; | |
786e8c11 | 2001 | if (!state) state = 1; |
07be1b83 YO |
2002 | } |
2003 | } | |
2004 | if ( aho->states[ state ].wordnum ) { | |
2e64971a | 2005 | U8 *lpos = points[ (pointpos - trie->wordinfo[aho->states[ state ].wordnum].len) % maxlen ]; |
786e8c11 YO |
2006 | if (!leftmost || lpos < leftmost) { |
2007 | DEBUG_r(accepted_word=aho->states[ state ].wordnum); | |
07be1b83 | 2008 | leftmost = lpos; |
786e8c11 | 2009 | } |
07be1b83 | 2010 | } |
07be1b83 YO |
2011 | if (leftmost) { |
2012 | s = (char*)leftmost; | |
786e8c11 YO |
2013 | DEBUG_TRIE_EXECUTE_r({ |
2014 | PerlIO_printf( | |
70685ca0 JH |
2015 | Perl_debug_log,"Matches word #%"UVxf" at position %"IVdf". Trying full pattern...\n", |
2016 | (UV)accepted_word, (IV)(s - real_start) | |
786e8c11 YO |
2017 | ); |
2018 | }); | |
24b23f37 | 2019 | if (!reginfo || regtry(reginfo, &s)) { |
be8e71aa YO |
2020 | FREETMPS; |
2021 | LEAVE; | |
07be1b83 | 2022 | goto got_it; |
be8e71aa | 2023 | } |
07be1b83 | 2024 | s = HOPc(s,1); |
786e8c11 YO |
2025 | DEBUG_TRIE_EXECUTE_r({ |
2026 | PerlIO_printf( Perl_debug_log,"Pattern failed. Looking for new start point...\n"); | |
2027 | }); | |
07be1b83 | 2028 | } else { |
786e8c11 YO |
2029 | DEBUG_TRIE_EXECUTE_r( |
2030 | PerlIO_printf( Perl_debug_log,"No match.\n")); | |
07be1b83 YO |
2031 | break; |
2032 | } | |
2033 | } | |
be8e71aa YO |
2034 | FREETMPS; |
2035 | LEAVE; | |
07be1b83 YO |
2036 | } |
2037 | break; | |
b3c9acc1 | 2038 | default: |
3c3eec57 GS |
2039 | Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c)); |
2040 | break; | |
d6a28714 | 2041 | } |
6eb5f6b9 JH |
2042 | return 0; |
2043 | got_it: | |
2044 | return s; | |
2045 | } | |
2046 | ||
fae667d5 | 2047 | |
6eb5f6b9 JH |
2048 | /* |
2049 | - regexec_flags - match a regexp against a string | |
2050 | */ | |
2051 | I32 | |
288b8c02 | 2052 | Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, register char *strend, |
6eb5f6b9 JH |
2053 | char *strbeg, I32 minend, SV *sv, void *data, U32 flags) |
2054 | /* strend: pointer to null at end of string */ | |
2055 | /* strbeg: real beginning of string */ | |
2056 | /* minend: end of match must be >=minend after stringarg. */ | |
58e23c8d YO |
2057 | /* data: May be used for some additional optimizations. |
2058 | Currently its only used, with a U32 cast, for transmitting | |
2059 | the ganch offset when doing a /g match. This will change */ | |
6eb5f6b9 JH |
2060 | /* nosave: For optimizations. */ |
2061 | { | |
97aff369 | 2062 | dVAR; |
288b8c02 | 2063 | struct regexp *const prog = (struct regexp *)SvANY(rx); |
24b23f37 | 2064 | /*register*/ char *s; |
eb578fdb | 2065 | regnode *c; |
24b23f37 | 2066 | /*register*/ char *startpos = stringarg; |
6eb5f6b9 JH |
2067 | I32 minlen; /* must match at least this many chars */ |
2068 | I32 dontbother = 0; /* how many characters not to try at end */ | |
6eb5f6b9 JH |
2069 | I32 end_shift = 0; /* Same for the end. */ /* CC */ |
2070 | I32 scream_pos = -1; /* Internal iterator of scream. */ | |
ccac19ea | 2071 | char *scream_olds = NULL; |
f2ed9b32 | 2072 | const bool utf8_target = cBOOL(DO_UTF8(sv)); |
2757e526 | 2073 | I32 multiline; |
f8fc2ecf | 2074 | RXi_GET_DECL(prog,progi); |
3b0527fe | 2075 | regmatch_info reginfo; /* create some info to pass to regtry etc */ |
e9105d30 | 2076 | regexp_paren_pair *swap = NULL; |
a3621e74 YO |
2077 | GET_RE_DEBUG_FLAGS_DECL; |
2078 | ||
7918f24d | 2079 | PERL_ARGS_ASSERT_REGEXEC_FLAGS; |
9d4ba2ae | 2080 | PERL_UNUSED_ARG(data); |
6eb5f6b9 JH |
2081 | |
2082 | /* Be paranoid... */ | |
2083 | if (prog == NULL || startpos == NULL) { | |
2084 | Perl_croak(aTHX_ "NULL regexp parameter"); | |
2085 | return 0; | |
2086 | } | |
2087 | ||
bbe252da | 2088 | multiline = prog->extflags & RXf_PMf_MULTILINE; |
288b8c02 | 2089 | reginfo.prog = rx; /* Yes, sorry that this is confusing. */ |
2757e526 | 2090 | |
f2ed9b32 | 2091 | RX_MATCH_UTF8_set(rx, utf8_target); |
1de06328 | 2092 | DEBUG_EXECUTE_r( |
f2ed9b32 | 2093 | debug_start_match(rx, utf8_target, startpos, strend, |
1de06328 YO |
2094 | "Matching"); |
2095 | ); | |
bac06658 | 2096 | |
6eb5f6b9 | 2097 | minlen = prog->minlen; |
1de06328 YO |
2098 | |
2099 | if (strend - startpos < (minlen+(prog->check_offset_min<0?prog->check_offset_min:0))) { | |
a3621e74 | 2100 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
a72c7584 JH |
2101 | "String too short [regexec_flags]...\n")); |
2102 | goto phooey; | |
1aa99e6b | 2103 | } |
6eb5f6b9 | 2104 | |
1de06328 | 2105 | |
6eb5f6b9 | 2106 | /* Check validity of program. */ |
f8fc2ecf | 2107 | if (UCHARAT(progi->program) != REG_MAGIC) { |
6eb5f6b9 JH |
2108 | Perl_croak(aTHX_ "corrupted regexp program"); |
2109 | } | |
2110 | ||
2111 | PL_reg_flags = 0; | |
ed301438 | 2112 | PL_reg_state.re_state_eval_setup_done = FALSE; |
6eb5f6b9 JH |
2113 | PL_reg_maxiter = 0; |
2114 | ||
3c8556c3 | 2115 | if (RX_UTF8(rx)) |
6eb5f6b9 JH |
2116 | PL_reg_flags |= RF_utf8; |
2117 | ||
2118 | /* Mark beginning of line for ^ and lookbehind. */ | |
3b0527fe | 2119 | reginfo.bol = startpos; /* XXX not used ??? */ |
6eb5f6b9 | 2120 | PL_bostr = strbeg; |
3b0527fe | 2121 | reginfo.sv = sv; |
6eb5f6b9 JH |
2122 | |
2123 | /* Mark end of line for $ (and such) */ | |
2124 | PL_regeol = strend; | |
2125 | ||
2126 | /* see how far we have to get to not match where we matched before */ | |
3b0527fe | 2127 | reginfo.till = startpos+minend; |
6eb5f6b9 | 2128 | |
6eb5f6b9 JH |
2129 | /* If there is a "must appear" string, look for it. */ |
2130 | s = startpos; | |
2131 | ||
bbe252da | 2132 | if (prog->extflags & RXf_GPOS_SEEN) { /* Need to set reginfo->ganch */ |
6eb5f6b9 | 2133 | MAGIC *mg; |
2c296965 | 2134 | if (flags & REXEC_IGNOREPOS){ /* Means: check only at start */ |
58e23c8d | 2135 | reginfo.ganch = startpos + prog->gofs; |
2c296965 | 2136 | DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log, |
ed549f2e | 2137 | "GPOS IGNOREPOS: reginfo.ganch = startpos + %"UVxf"\n",(UV)prog->gofs)); |
2c296965 | 2138 | } else if (sv && SvTYPE(sv) >= SVt_PVMG |
6eb5f6b9 | 2139 | && SvMAGIC(sv) |
14befaf4 DM |
2140 | && (mg = mg_find(sv, PERL_MAGIC_regex_global)) |
2141 | && mg->mg_len >= 0) { | |
3b0527fe | 2142 | reginfo.ganch = strbeg + mg->mg_len; /* Defined pos() */ |
2c296965 | 2143 | DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log, |
ed549f2e | 2144 | "GPOS MAGIC: reginfo.ganch = strbeg + %"IVdf"\n",(IV)mg->mg_len)); |
2c296965 | 2145 | |
bbe252da | 2146 | if (prog->extflags & RXf_ANCH_GPOS) { |
3b0527fe | 2147 | if (s > reginfo.ganch) |
6eb5f6b9 | 2148 | goto phooey; |
58e23c8d | 2149 | s = reginfo.ganch - prog->gofs; |
2c296965 | 2150 | DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log, |
ed549f2e | 2151 | "GPOS ANCH_GPOS: s = ganch - %"UVxf"\n",(UV)prog->gofs)); |
c584a96e YO |
2152 | if (s < strbeg) |
2153 | goto phooey; | |
6eb5f6b9 JH |
2154 | } |
2155 | } | |
58e23c8d | 2156 | else if (data) { |
70685ca0 | 2157 | reginfo.ganch = strbeg + PTR2UV(data); |
2c296965 YO |
2158 | DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log, |
2159 | "GPOS DATA: reginfo.ganch= strbeg + %"UVxf"\n",PTR2UV(data))); | |
2160 | ||
2161 | } else { /* pos() not defined */ | |
3b0527fe | 2162 | reginfo.ganch = strbeg; |
2c296965 YO |
2163 | DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log, |
2164 | "GPOS: reginfo.ganch = strbeg\n")); | |
2165 | } | |
6eb5f6b9 | 2166 | } |
288b8c02 | 2167 | if (PL_curpm && (PM_GETRE(PL_curpm) == rx)) { |
e9105d30 GG |
2168 | /* We have to be careful. If the previous successful match |
2169 | was from this regex we don't want a subsequent partially | |
2170 | successful match to clobber the old results. | |
2171 | So when we detect this possibility we add a swap buffer | |
2172 | to the re, and switch the buffer each match. If we fail | |
2173 | we switch it back, otherwise we leave it swapped. | |
2174 | */ | |
2175 | swap = prog->offs; | |
2176 | /* do we need a save destructor here for eval dies? */ | |
2177 | Newxz(prog->offs, (prog->nparens + 1), regexp_paren_pair); | |
495f47a5 DM |
2178 | DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log, |
2179 | "rex=0x%"UVxf" saving offs: orig=0x%"UVxf" new=0x%"UVxf"\n", | |
2180 | PTR2UV(prog), | |
2181 | PTR2UV(swap), | |
2182 | PTR2UV(prog->offs) | |
2183 | )); | |
c74340f9 | 2184 | } |
a0714e2c | 2185 | if (!(flags & REXEC_CHECKED) && (prog->check_substr != NULL || prog->check_utf8 != NULL)) { |
6eb5f6b9 JH |
2186 | re_scream_pos_data d; |
2187 | ||
2188 | d.scream_olds = &scream_olds; | |
2189 | d.scream_pos = &scream_pos; | |
288b8c02 | 2190 | s = re_intuit_start(rx, sv, s, strend, flags, &d); |
3fa9c3d7 | 2191 | if (!s) { |
a3621e74 | 2192 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not present...\n")); |
6eb5f6b9 | 2193 | goto phooey; /* not present */ |
3fa9c3d7 | 2194 | } |
6eb5f6b9 JH |
2195 | } |
2196 | ||
1de06328 | 2197 | |
6eb5f6b9 JH |
2198 | |
2199 | /* Simplest case: anchored match need be tried only once. */ | |
2200 | /* [unless only anchor is BOL and multiline is set] */ | |
bbe252da | 2201 | if (prog->extflags & (RXf_ANCH & ~RXf_ANCH_GPOS)) { |
24b23f37 | 2202 | if (s == startpos && regtry(®info, &startpos)) |
6eb5f6b9 | 2203 | goto got_it; |
bbe252da YO |
2204 | else if (multiline || (prog->intflags & PREGf_IMPLICIT) |
2205 | || (prog->extflags & RXf_ANCH_MBOL)) /* XXXX SBOL? */ | |
6eb5f6b9 JH |
2206 | { |
2207 | char *end; | |
2208 | ||
2209 | if (minlen) | |
2210 | dontbother = minlen - 1; | |
1aa99e6b | 2211 | end = HOP3c(strend, -dontbother, strbeg) - 1; |
6eb5f6b9 | 2212 | /* for multiline we only have to try after newlines */ |
33b8afdf | 2213 | if (prog->check_substr || prog->check_utf8) { |
92f3d482 YO |
2214 | /* because of the goto we can not easily reuse the macros for bifurcating the |
2215 | unicode/non-unicode match modes here like we do elsewhere - demerphq */ | |
2216 | if (utf8_target) { | |
2217 | if (s == startpos) | |
2218 | goto after_try_utf8; | |
2219 | while (1) { | |
2220 | if (regtry(®info, &s)) { | |
2221 | goto got_it; | |
2222 | } | |
2223 | after_try_utf8: | |
2224 | if (s > end) { | |
2225 | goto phooey; | |
2226 | } | |
2227 | if (prog->extflags & RXf_USE_INTUIT) { | |
2228 | s = re_intuit_start(rx, sv, s + UTF8SKIP(s), strend, flags, NULL); | |
2229 | if (!s) { | |
2230 | goto phooey; | |
2231 | } | |
2232 | } | |
2233 | else { | |
2234 | s += UTF8SKIP(s); | |
2235 | } | |
2236 | } | |
2237 | } /* end search for check string in unicode */ | |
2238 | else { | |
2239 | if (s == startpos) { | |
2240 | goto after_try_latin; | |
2241 | } | |
2242 | while (1) { | |
2243 | if (regtry(®info, &s)) { | |
2244 | goto got_it; | |
2245 | } | |
2246 | after_try_latin: | |
2247 | if (s > end) { | |
2248 | goto phooey; | |
2249 | } | |
2250 | if (prog->extflags & RXf_USE_INTUIT) { | |
2251 | s = re_intuit_start(rx, sv, s + 1, strend, flags, NULL); | |
2252 | if (!s) { | |
2253 | goto phooey; | |
2254 | } | |
2255 | } | |
2256 | else { | |
2257 | s++; | |
2258 | } | |
2259 | } | |
2260 | } /* end search for check string in latin*/ | |
2261 | } /* end search for check string */ | |
2262 | else { /* search for newline */ | |
2263 | if (s > startpos) { | |
2264 | /*XXX: The s-- is almost definitely wrong here under unicode - demeprhq*/ | |
6eb5f6b9 | 2265 | s--; |
92f3d482 | 2266 | } |
21eede78 YO |
2267 | /* We can use a more efficient search as newlines are the same in unicode as they are in latin */ |
2268 | while (s <= end) { /* note it could be possible to match at the end of the string */ | |
6eb5f6b9 | 2269 | if (*s++ == '\n') { /* don't need PL_utf8skip here */ |
24b23f37 | 2270 | if (regtry(®info, &s)) |
6eb5f6b9 JH |
2271 | goto got_it; |
2272 | } | |
92f3d482 YO |
2273 | } |
2274 | } /* end search for newline */ | |
2275 | } /* end anchored/multiline check string search */ | |
6eb5f6b9 | 2276 | goto phooey; |
bbe252da | 2277 | } else if (RXf_GPOS_CHECK == (prog->extflags & RXf_GPOS_CHECK)) |
f9f4320a | 2278 | { |
486ec47a | 2279 | /* the warning about reginfo.ganch being used without initialization |
bbe252da | 2280 | is bogus -- we set it above, when prog->extflags & RXf_GPOS_SEEN |
f9f4320a | 2281 | and we only enter this block when the same bit is set. */ |
58e23c8d | 2282 | char *tmp_s = reginfo.ganch - prog->gofs; |
c584a96e YO |
2283 | |
2284 | if (tmp_s >= strbeg && regtry(®info, &tmp_s)) | |
6eb5f6b9 JH |
2285 | goto got_it; |
2286 | goto phooey; | |
2287 | } | |
2288 | ||
2289 | /* Messy cases: unanchored match. */ | |
bbe252da | 2290 | if ((prog->anchored_substr || prog->anchored_utf8) && prog->intflags & PREGf_SKIP) { |
6eb5f6b9 | 2291 | /* we have /x+whatever/ */ |
f2ed9b32 | 2292 | /* it must be a one character string (XXXX Except UTF_PATTERN?) */ |
33b8afdf | 2293 | char ch; |
bf93d4cc GS |
2294 | #ifdef DEBUGGING |
2295 | int did_match = 0; | |
2296 | #endif | |
f2ed9b32 KW |
2297 | if (!(utf8_target ? prog->anchored_utf8 : prog->anchored_substr)) |
2298 | utf8_target ? to_utf8_substr(prog) : to_byte_substr(prog); | |
2299 | ch = SvPVX_const(utf8_target ? prog->anchored_utf8 : prog->anchored_substr)[0]; | |
bf93d4cc | 2300 | |
f2ed9b32 | 2301 | if (utf8_target) { |
4cadc6a9 | 2302 | REXEC_FBC_SCAN( |
6eb5f6b9 | 2303 | if (*s == ch) { |
a3621e74 | 2304 | DEBUG_EXECUTE_r( did_match = 1 ); |
24b23f37 | 2305 | if (regtry(®info, &s)) goto got_it; |
6eb5f6b9 JH |
2306 | s += UTF8SKIP(s); |
2307 | while (s < strend && *s == ch) | |
2308 | s += UTF8SKIP(s); | |
2309 | } | |
4cadc6a9 | 2310 | ); |
6eb5f6b9 JH |
2311 | } |
2312 | else { | |
4cadc6a9 | 2313 | REXEC_FBC_SCAN( |
6eb5f6b9 | 2314 | if (*s == ch) { |
a3621e74 | 2315 | DEBUG_EXECUTE_r( did_match = 1 ); |
24b23f37 | 2316 | if (regtry(®info, &s)) goto got_it; |
6eb5f6b9 JH |
2317 | s++; |
2318 | while (s < strend && *s == ch) | |
2319 | s++; | |
2320 | } | |
4cadc6a9 | 2321 | ); |
6eb5f6b9 | 2322 | } |
a3621e74 | 2323 | DEBUG_EXECUTE_r(if (!did_match) |
bf93d4cc | 2324 | PerlIO_printf(Perl_debug_log, |
b7953727 JH |
2325 | "Did not find anchored character...\n") |
2326 | ); | |
6eb5f6b9 | 2327 | } |
a0714e2c SS |
2328 | else if (prog->anchored_substr != NULL |
2329 | || prog->anchored_utf8 != NULL | |
2330 | || ((prog->float_substr != NULL || prog->float_utf8 != NULL) | |
33b8afdf JH |
2331 | && prog->float_max_offset < strend - s)) { |
2332 | SV *must; | |
2333 | I32 back_max; | |
2334 | I32 back_min; | |
2335 | char *last; | |
6eb5f6b9 | 2336 | char *last1; /* Last position checked before */ |
bf93d4cc GS |
2337 | #ifdef DEBUGGING |
2338 | int did_match = 0; | |
2339 | #endif | |
33b8afdf | 2340 | if (prog->anchored_substr || prog->anchored_utf8) { |
f2ed9b32 KW |
2341 | if (!(utf8_target ? prog->anchored_utf8 : prog->anchored_substr)) |
2342 | utf8_target ? to_utf8_substr(prog) : to_byte_substr(prog); | |
2343 | must = utf8_target ? prog->anchored_utf8 : prog->anchored_substr; | |
33b8afdf JH |
2344 | back_max = back_min = prog->anchored_offset; |
2345 | } else { | |
f2ed9b32 KW |
2346 | if (!(utf8_target ? prog->float_utf8 : prog->float_substr)) |
2347 | utf8_target ? to_utf8_substr(prog) : to_byte_substr(prog); | |
2348 | must = utf8_target ? prog->float_utf8 : prog->float_substr; | |
33b8afdf JH |
2349 | back_max = prog->float_max_offset; |
2350 | back_min = prog->float_min_offset; | |
2351 | } | |
1de06328 YO |
2352 | |
2353 | ||
33b8afdf JH |
2354 | if (must == &PL_sv_undef) |
2355 | /* could not downgrade utf8 check substring, so must fail */ | |
2356 | goto phooey; | |
2357 | ||
1de06328 YO |
2358 | if (back_min<0) { |
2359 | last = strend; | |
2360 | } else { | |
2361 | last = HOP3c(strend, /* Cannot start after this */ | |
2362 | -(I32)(CHR_SVLEN(must) | |
2363 | - (SvTAIL(must) != 0) + back_min), strbeg); | |
2364 | } | |
6eb5f6b9 JH |
2365 | if (s > PL_bostr) |
2366 | last1 = HOPc(s, -1); | |
2367 | else | |
2368 | last1 = s - 1; /* bogus */ | |
2369 | ||
a0288114 | 2370 | /* XXXX check_substr already used to find "s", can optimize if |
6eb5f6b9 JH |
2371 | check_substr==must. */ |
2372 | scream_pos = -1; | |
2373 | dontbother = end_shift; | |
2374 | strend = HOPc(strend, -dontbother); | |
2375 | while ( (s <= last) && | |
c33e64f0 | 2376 | (s = fbm_instr((unsigned char*)HOP3(s, back_min, (back_min<0 ? strbeg : strend)), |
9041c2e3 | 2377 | (unsigned char*)strend, must, |
c33e64f0 | 2378 | multiline ? FBMrf_MULTILINE : 0)) ) { |
a3621e74 | 2379 | DEBUG_EXECUTE_r( did_match = 1 ); |
6eb5f6b9 JH |
2380 | if (HOPc(s, -back_max) > last1) { |
2381 | last1 = HOPc(s, -back_min); | |
2382 | s = HOPc(s, -back_max); | |
2383 | } | |
2384 | else { | |
52657f30 | 2385 | char * const t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1; |
6eb5f6b9 JH |
2386 | |
2387 | last1 = HOPc(s, -back_min); | |
52657f30 | 2388 | s = t; |
6eb5f6b9 | 2389 | } |
f2ed9b32 | 2390 | if (utf8_target) { |
6eb5f6b9 | 2391 | while (s <= last1) { |
24b23f37 | 2392 | if (regtry(®info, &s)) |
6eb5f6b9 JH |
2393 | goto got_it; |
2394 | s += UTF8SKIP(s); | |
2395 | } | |
2396 | } | |
2397 | else { | |
2398 | while (s <= last1) { | |
24b23f37 | 2399 | if (regtry(®info, &s)) |
6eb5f6b9 JH |
2400 | goto got_it; |
2401 | s++; | |
2402 | } | |
2403 | } | |
2404 | } | |
ab3bbdeb | 2405 | DEBUG_EXECUTE_r(if (!did_match) { |
f2ed9b32 | 2406 | RE_PV_QUOTED_DECL(quoted, utf8_target, PERL_DEBUG_PAD_ZERO(0), |
ab3bbdeb YO |
2407 | SvPVX_const(must), RE_SV_DUMPLEN(must), 30); |
2408 | PerlIO_printf(Perl_debug_log, "Did not find %s substr %s%s...\n", | |
33b8afdf | 2409 | ((must == prog->anchored_substr || must == prog->anchored_utf8) |
bf93d4cc | 2410 | ? "anchored" : "floating"), |
ab3bbdeb YO |
2411 | quoted, RE_SV_TAIL(must)); |
2412 | }); | |
6eb5f6b9 JH |
2413 | goto phooey; |
2414 | } | |
f8fc2ecf | 2415 | else if ( (c = progi->regstclass) ) { |
f14c76ed | 2416 | if (minlen) { |
f8fc2ecf | 2417 | const OPCODE op = OP(progi->regstclass); |
66e933ab | 2418 | /* don't bother with what can't match */ |
786e8c11 | 2419 | if (PL_regkind[op] != EXACT && op != CANY && PL_regkind[op] != TRIE) |
f14c76ed RGS |
2420 | strend = HOPc(strend, -(minlen - 1)); |
2421 | } | |
a3621e74 | 2422 | DEBUG_EXECUTE_r({ |
be8e71aa | 2423 | SV * const prop = sv_newmortal(); |
32fc9b6a | 2424 | regprop(prog, prop, c); |
0df25f3d | 2425 | { |
f2ed9b32 | 2426 | RE_PV_QUOTED_DECL(quoted,utf8_target,PERL_DEBUG_PAD_ZERO(1), |
ab3bbdeb | 2427 | s,strend-s,60); |
0df25f3d | 2428 | PerlIO_printf(Perl_debug_log, |
1c8f8eb1 | 2429 | "Matching stclass %.*s against %s (%d bytes)\n", |
e4f74956 | 2430 | (int)SvCUR(prop), SvPVX_const(prop), |
ab3bbdeb | 2431 | quoted, (int)(strend - s)); |
0df25f3d | 2432 | } |
ffc61ed2 | 2433 | }); |
3b0527fe | 2434 | if (find_byclass(prog, c, s, strend, ®info)) |
6eb5f6b9 | 2435 | goto got_it; |
07be1b83 | 2436 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass... [regexec_flags]\n")); |
d6a28714 JH |
2437 | } |
2438 | else { | |
2439 | dontbother = 0; | |
a0714e2c | 2440 | if (prog->float_substr != NULL || prog->float_utf8 != NULL) { |
33b8afdf | 2441 | /* Trim the end. */ |
6af40bd7 | 2442 | char *last= NULL; |
33b8afdf | 2443 | SV* float_real; |
c33e64f0 FC |
2444 | STRLEN len; |
2445 | const char *little; | |
33b8afdf | 2446 | |
f2ed9b32 KW |
2447 | if (!(utf8_target ? prog->float_utf8 : prog->float_substr)) |
2448 | utf8_target ? to_utf8_substr(prog) : to_byte_substr(prog); | |
2449 | float_real = utf8_target ? prog->float_utf8 : prog->float_substr; | |
d6a28714 | 2450 | |
c33e64f0 FC |
2451 | little = SvPV_const(float_real, len); |
2452 | if (SvTAIL(float_real)) { | |
1a13b075 YO |
2453 | /* This means that float_real contains an artificial \n on the end |
2454 | * due to the presence of something like this: /foo$/ | |
2455 | * where we can match both "foo" and "foo\n" at the end of the string. | |
2456 | * So we have to compare the end of the string first against the float_real | |
2457 | * without the \n and then against the full float_real with the string. | |
2458 | * We have to watch out for cases where the string might be smaller | |
2459 | * than the float_real or the float_real without the \n. | |
2460 | */ | |
2461 | char *checkpos= strend - len; | |
2462 | DEBUG_OPTIMISE_r( | |
2463 | PerlIO_printf(Perl_debug_log, | |
2464 | "%sChecking for float_real.%s\n", | |
2465 | PL_colors[4], PL_colors[5])); | |
2466 | if (checkpos + 1 < strbeg) { | |
2467 | /* can't match, even if we remove the trailing \n string is too short to match */ | |
2468 | DEBUG_EXECUTE_r( | |
2469 | PerlIO_printf(Perl_debug_log, | |
2470 | "%sString shorter than required trailing substring, cannot match.%s\n", | |
2471 | PL_colors[4], PL_colors[5])); | |
2472 | goto phooey; | |
2473 | } else if (memEQ(checkpos + 1, little, len - 1)) { | |
2474 | /* can match, the end of the string matches without the "\n" */ | |
2475 | last = checkpos + 1; | |
2476 | } else if (checkpos < strbeg) { | |
2477 | /* cant match, string is too short when the "\n" is included */ | |
2478 | DEBUG_EXECUTE_r( | |
2479 | PerlIO_printf(Perl_debug_log, | |
2480 | "%sString does not contain required trailing substring, cannot match.%s\n", | |
2481 | PL_colors[4], PL_colors[5])); | |
2482 | goto phooey; | |
2483 | } else if (!multiline) { | |
2484 | /* non multiline match, so compare with the "\n" at the end of the string */ | |
2485 | if (memEQ(checkpos, little, len)) { | |
2486 | last= checkpos; | |
2487 | } else { | |
2488 | DEBUG_EXECUTE_r( | |
2489 | PerlIO_printf(Perl_debug_log, | |
2490 | "%sString does not contain required trailing substring, cannot match.%s\n", | |
2491 | PL_colors[4], PL_colors[5])); | |
2492 | goto phooey; | |
2493 | } | |
2494 | } else { | |
2495 | /* multiline match, so we have to search for a place where the full string is located */ | |
d6a28714 | 2496 | goto find_last; |
1a13b075 | 2497 | } |
c33e64f0 | 2498 | } else { |
d6a28714 | 2499 | find_last: |
9041c2e3 | 2500 | if (len) |
d6a28714 | 2501 | last = rninstr(s, strend, little, little + len); |
b8c5462f | 2502 | else |
a0288114 | 2503 | last = strend; /* matching "$" */ |
b8c5462f | 2504 | } |
6af40bd7 YO |
2505 | if (!last) { |
2506 | /* at one point this block contained a comment which was probably | |
2507 | * incorrect, which said that this was a "should not happen" case. | |
2508 | * Even if it was true when it was written I am pretty sure it is | |
2509 | * not anymore, so I have removed the comment and replaced it with | |
2510 | * this one. Yves */ | |
6bda09f9 YO |
2511 | DEBUG_EXECUTE_r( |
2512 | PerlIO_printf(Perl_debug_log, | |
6af40bd7 YO |
2513 | "String does not contain required substring, cannot match.\n" |
2514 | )); | |
2515 | goto phooey; | |
bf93d4cc | 2516 | } |
d6a28714 JH |
2517 | dontbother = strend - last + prog->float_min_offset; |
2518 | } | |
2519 | if (minlen && (dontbother < minlen)) | |
2520 | dontbother = minlen - 1; | |
2521 | strend -= dontbother; /* this one's always in bytes! */ | |
2522 | /* We don't know much -- general case. */ | |
f2ed9b32 | 2523 | if (utf8_target) { |
d6a28714 | 2524 | for (;;) { |
24b23f37 | 2525 | if (regtry(®info, &s)) |
d6a28714 JH |
2526 | goto got_it; |
2527 | if (s >= strend) | |
2528 | break; | |
b8c5462f | 2529 | s += UTF8SKIP(s); |
d6a28714 JH |
2530 | }; |
2531 | } | |
2532 | else { | |
2533 | do { | |
24b23f37 | 2534 | if (regtry(®info, &s)) |
d6a28714 JH |
2535 | goto got_it; |
2536 | } while (s++ < strend); | |
2537 | } | |
2538 | } | |
2539 | ||
2540 | /* Failure. */ | |
2541 | goto phooey; | |
2542 | ||
2543 | got_it: | |
495f47a5 DM |
2544 | DEBUG_BUFFERS_r( |
2545 | if (swap) | |
2546 | PerlIO_printf(Perl_debug_log, | |
2547 | "rex=0x%"UVxf" freeing offs: 0x%"UVxf"\n", | |
2548 | PTR2UV(prog), | |
2549 | PTR2UV(swap) | |
2550 | ); | |
2551 | ); | |
e9105d30 | 2552 | Safefree(swap); |
288b8c02 | 2553 | RX_MATCH_TAINTED_set(rx, PL_reg_flags & RF_tainted); |
d6a28714 | 2554 | |
ed301438 | 2555 | if (PL_reg_state.re_state_eval_setup_done) |
4f639d21 | 2556 | restore_pos(aTHX_ prog); |
5daac39c NC |
2557 | if (RXp_PAREN_NAMES(prog)) |
2558 | (void)hv_iterinit(RXp_PAREN_NAMES(prog)); | |
d6a28714 JH |
2559 | |
2560 | /* make sure $`, $&, $', and $digit will work later */ | |
2561 | if ( !(flags & REXEC_NOT_FIRST) ) { | |
288b8c02 | 2562 | RX_MATCH_COPY_FREE(rx); |
d6a28714 | 2563 | if (flags & REXEC_COPY_STR) { |
be8e71aa | 2564 | const I32 i = PL_regeol - startpos + (stringarg - strbeg); |
f8c7b90f | 2565 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2566 | if ((SvIsCOW(sv) |
2567 | || (SvFLAGS(sv) & CAN_COW_MASK) == CAN_COW_FLAGS)) { | |
2568 | if (DEBUG_C_TEST) { | |
2569 | PerlIO_printf(Perl_debug_log, | |
2570 | "Copy on write: regexp capture, type %d\n", | |
2571 | (int) SvTYPE(sv)); | |
2572 | } | |
2573 | prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv); | |
d5263905 | 2574 | prog->subbeg = (char *)SvPVX_const(prog->saved_copy); |
ed252734 NC |
2575 | assert (SvPOKp(prog->saved_copy)); |
2576 | } else | |
2577 | #endif | |
2578 | { | |
288b8c02 | 2579 | RX_MATCH_COPIED_on(rx); |
ed252734 NC |
2580 | s = savepvn(strbeg, i); |
2581 | prog->subbeg = s; | |
2582 | } | |
d6a28714 | 2583 | prog->sublen = i; |
d6a28714 JH |
2584 | } |
2585 | else { | |
2586 | prog->subbeg = strbeg; | |
2587 | prog->sublen = PL_regeol - strbeg; /* strend may have been modified */ | |
2588 | } | |
2589 | } | |
9041c2e3 | 2590 | |
d6a28714 JH |
2591 | return 1; |
2592 | ||
2593 | phooey: | |
a3621e74 | 2594 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n", |
e4584336 | 2595 | PL_colors[4], PL_colors[5])); |
ed301438 | 2596 | if (PL_reg_state.re_state_eval_setup_done) |
4f639d21 | 2597 | restore_pos(aTHX_ prog); |
e9105d30 | 2598 | if (swap) { |
c74340f9 | 2599 | /* we failed :-( roll it back */ |
495f47a5 DM |
2600 | DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log, |
2601 | "rex=0x%"UVxf" rolling back offs: freeing=0x%"UVxf" restoring=0x%"UVxf"\n", | |
2602 | PTR2UV(prog), | |
2603 | PTR2UV(prog->offs), | |
2604 | PTR2UV(swap) | |
2605 | )); | |
e9105d30 GG |
2606 | Safefree(prog->offs); |
2607 | prog->offs = swap; | |
2608 | } | |
2609 | ||
d6a28714 JH |
2610 | return 0; |
2611 | } | |
2612 | ||
6bda09f9 | 2613 | |
ec43f78b DM |
2614 | /* Set which rex is pointed to by PL_reg_state, handling ref counting. |
2615 | * Do inc before dec, in case old and new rex are the same */ | |
2616 | #define SET_reg_curpm(Re2) \ | |
2617 | if (PL_reg_state.re_state_eval_setup_done) { \ | |
2618 | (void)ReREFCNT_inc(Re2); \ | |
2619 | ReREFCNT_dec(PM_GETRE(PL_reg_curpm)); \ | |
2620 | PM_SETRE((PL_reg_curpm), (Re2)); \ | |
2621 | } | |
2622 | ||
2623 | ||
d6a28714 JH |
2624 | /* |
2625 | - regtry - try match at specific point | |
2626 | */ | |
2627 | STATIC I32 /* 0 failure, 1 success */ | |
24b23f37 | 2628 | S_regtry(pTHX_ regmatch_info *reginfo, char **startpos) |
d6a28714 | 2629 | { |
97aff369 | 2630 | dVAR; |
d6a28714 | 2631 | CHECKPOINT lastcp; |
288b8c02 NC |
2632 | REGEXP *const rx = reginfo->prog; |
2633 | regexp *const prog = (struct regexp *)SvANY(rx); | |
f8fc2ecf | 2634 | RXi_GET_DECL(prog,progi); |
a3621e74 | 2635 | GET_RE_DEBUG_FLAGS_DECL; |
7918f24d NC |
2636 | |
2637 | PERL_ARGS_ASSERT_REGTRY; | |
2638 | ||
24b23f37 | 2639 | reginfo->cutpoint=NULL; |
d6a28714 | 2640 | |
ed301438 DM |
2641 | if ((prog->extflags & RXf_EVAL_SEEN) |
2642 | && !PL_reg_state.re_state_eval_setup_done) | |
2643 | { | |
d6a28714 JH |
2644 | MAGIC *mg; |
2645 | ||
ed301438 | 2646 | PL_reg_state.re_state_eval_setup_done = TRUE; |
3b0527fe | 2647 | if (reginfo->sv) { |
d6a28714 | 2648 | /* Make $_ available to executed code. */ |
3b0527fe | 2649 | if (reginfo->sv != DEFSV) { |
59f00321 | 2650 | SAVE_DEFSV; |
414bf5ae | 2651 | DEFSV_set(reginfo->sv); |
b8c5462f | 2652 | } |
d6a28714 | 2653 | |
3b0527fe DM |
2654 | if (!(SvTYPE(reginfo->sv) >= SVt_PVMG && SvMAGIC(reginfo->sv) |
2655 | && (mg = mg_find(reginfo->sv, PERL_MAGIC_regex_global)))) { | |
d6a28714 | 2656 | /* prepare for quick setting of pos */ |
d300d9fa | 2657 | #ifdef PERL_OLD_COPY_ON_WRITE |
51a9ea20 NC |
2658 | if (SvIsCOW(reginfo->sv)) |
2659 | sv_force_normal_flags(reginfo->sv, 0); | |
d300d9fa | 2660 | #endif |
3dab1dad | 2661 | mg = sv_magicext(reginfo->sv, NULL, PERL_MAGIC_regex_global, |
d300d9fa | 2662 | &PL_vtbl_mglob, NULL, 0); |
d6a28714 | 2663 | mg->mg_len = -1; |
b8c5462f | 2664 | } |
d6a28714 JH |
2665 | PL_reg_magic = mg; |
2666 | PL_reg_oldpos = mg->mg_len; | |
4f639d21 | 2667 | SAVEDESTRUCTOR_X(restore_pos, prog); |
d6a28714 | 2668 | } |
09687e5a | 2669 | if (!PL_reg_curpm) { |
a02a5408 | 2670 | Newxz(PL_reg_curpm, 1, PMOP); |
09687e5a AB |
2671 | #ifdef USE_ITHREADS |
2672 | { | |
14a49a24 | 2673 | SV* const repointer = &PL_sv_undef; |
92313705 NC |
2674 | /* this regexp is also owned by the new PL_reg_curpm, which |
2675 | will try to free it. */ | |
d2ece331 | 2676 | av_push(PL_regex_padav, repointer); |
09687e5a AB |
2677 | PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav); |
2678 | PL_regex_pad = AvARRAY(PL_regex_padav); | |
2679 | } | |
2680 | #endif | |
2681 | } | |
ec43f78b | 2682 | SET_reg_curpm(rx); |
d6a28714 JH |
2683 | PL_reg_oldcurpm = PL_curpm; |
2684 | PL_curpm = PL_reg_curpm; | |
07bc277f | 2685 | if (RXp_MATCH_COPIED(prog)) { |
d6a28714 JH |
2686 | /* Here is a serious problem: we cannot rewrite subbeg, |
2687 | since it may be needed if this match fails. Thus | |
2688 | $` inside (?{}) could fail... */ | |
2689 | PL_reg_oldsaved = prog->subbeg; | |
2690 | PL_reg_oldsavedlen = prog->sublen; | |
f8c7b90f | 2691 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2692 | PL_nrs = prog->saved_copy; |
2693 | #endif | |
07bc277f | 2694 | RXp_MATCH_COPIED_off(prog); |
d6a28714 JH |
2695 | } |
2696 | else | |
bd61b366 | 2697 | PL_reg_oldsaved = NULL; |
d6a28714 JH |
2698 | prog->subbeg = PL_bostr; |
2699 | prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */ | |
2700 | } | |
97ca13b7 DM |
2701 | #ifdef DEBUGGING |
2702 | PL_reg_starttry = *startpos; | |
2703 | #endif | |
f0ab9afb | 2704 | prog->offs[0].start = *startpos - PL_bostr; |
24b23f37 | 2705 | PL_reginput = *startpos; |
d6a28714 | 2706 | prog->lastparen = 0; |
03994de8 | 2707 | prog->lastcloseparen = 0; |
d6a28714 | 2708 | PL_regsize = 0; |
d6a28714 JH |
2709 | |
2710 | /* XXXX What this code is doing here?!!! There should be no need | |
b93070ed | 2711 | to do this again and again, prog->lastparen should take care of |
3dd2943c | 2712 | this! --ilya*/ |
dafc8851 JH |
2713 | |
2714 | /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code. | |
2715 | * Actually, the code in regcppop() (which Ilya may be meaning by | |
b93070ed | 2716 | * prog->lastparen), is not needed at all by the test suite |
225593e1 DM |
2717 | * (op/regexp, op/pat, op/split), but that code is needed otherwise |
2718 | * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/ | |
2719 | * Meanwhile, this code *is* needed for the | |
daf18116 JH |
2720 | * above-mentioned test suite tests to succeed. The common theme |
2721 | * on those tests seems to be returning null fields from matches. | |
225593e1 | 2722 | * --jhi updated by dapm */ |
dafc8851 | 2723 | #if 1 |
d6a28714 | 2724 | if (prog->nparens) { |
b93070ed | 2725 | regexp_paren_pair *pp = prog->offs; |
eb578fdb | 2726 | I32 i; |
b93070ed | 2727 | for (i = prog->nparens; i > (I32)prog->lastparen; i--) { |
f0ab9afb NC |
2728 | ++pp; |
2729 | pp->start = -1; | |
2730 | pp->end = -1; | |
d6a28714 JH |
2731 | } |
2732 | } | |
dafc8851 | 2733 | #endif |
02db2b7b | 2734 | REGCP_SET(lastcp); |
f8fc2ecf | 2735 | if (regmatch(reginfo, progi->program + 1)) { |
b93070ed | 2736 | prog->offs[0].end = PL_reginput - PL_bostr; |
d6a28714 JH |
2737 | return 1; |
2738 | } | |
24b23f37 YO |
2739 | if (reginfo->cutpoint) |
2740 | *startpos= reginfo->cutpoint; | |
02db2b7b | 2741 | REGCP_UNWIND(lastcp); |
d6a28714 JH |
2742 | return 0; |
2743 | } | |
2744 | ||
02db2b7b | 2745 | |
8ba1375e MJD |
2746 | #define sayYES goto yes |
2747 | #define sayNO goto no | |
262b90c4 | 2748 | #define sayNO_SILENT goto no_silent |
8ba1375e | 2749 | |
f9f4320a YO |
2750 | /* we dont use STMT_START/END here because it leads to |
2751 | "unreachable code" warnings, which are bogus, but distracting. */ | |
2752 | #define CACHEsayNO \ | |
c476f425 DM |
2753 | if (ST.cache_mask) \ |
2754 | PL_reg_poscache[ST.cache_offset] |= ST.cache_mask; \ | |
f9f4320a | 2755 | sayNO |
3298f257 | 2756 | |
a3621e74 | 2757 | /* this is used to determine how far from the left messages like |
265c4333 YO |
2758 | 'failed...' are printed. It should be set such that messages |
2759 | are inline with the regop output that created them. | |
a3621e74 | 2760 | */ |
265c4333 | 2761 | #define REPORT_CODE_OFF 32 |
a3621e74 YO |
2762 | |
2763 | ||
40a82448 DM |
2764 | #define CHRTEST_UNINIT -1001 /* c1/c2 haven't been calculated yet */ |
2765 | #define CHRTEST_VOID -1000 /* the c1/c2 "next char" test should be skipped */ | |
9e137952 | 2766 | |
86545054 DM |
2767 | #define SLAB_FIRST(s) (&(s)->states[0]) |
2768 | #define SLAB_LAST(s) (&(s)->states[PERL_REGMATCH_SLAB_SLOTS-1]) | |
2769 | ||
5d9a96ca DM |
2770 | /* grab a new slab and return the first slot in it */ |
2771 | ||
2772 | STATIC regmatch_state * | |
2773 | S_push_slab(pTHX) | |
2774 | { | |
a35a87e7 | 2775 | #if PERL_VERSION < 9 && !defined(PERL_CORE) |
54df2634 NC |
2776 | dMY_CXT; |
2777 | #endif | |
5d9a96ca DM |
2778 | regmatch_slab *s = PL_regmatch_slab->next; |
2779 | if (!s) { | |
2780 | Newx(s, 1, regmatch_slab); | |
2781 | s->prev = PL_regmatch_slab; | |
2782 | s->next = NULL; | |
2783 | PL_regmatch_slab->next = s; | |
2784 | } | |
2785 | PL_regmatch_slab = s; | |
86545054 | 2786 | return SLAB_FIRST(s); |
5d9a96ca | 2787 | } |
5b47454d | 2788 | |
95b24440 | 2789 | |
40a82448 DM |
2790 | /* push a new state then goto it */ |
2791 | ||
2792 | #define PUSH_STATE_GOTO(state, node) \ | |
2793 | scan = node; \ | |
2794 | st->resume_state = state; \ | |
2795 | goto push_state; | |
2796 | ||
2797 | /* push a new state with success backtracking, then goto it */ | |
2798 | ||
2799 | #define PUSH_YES_STATE_GOTO(state, node) \ | |
2800 | scan = node; \ | |
2801 | st->resume_state = state; \ | |
2802 | goto push_yes_state; | |
2803 | ||
aa283a38 | 2804 | |
aa283a38 | 2805 | |
d6a28714 | 2806 | /* |
95b24440 | 2807 | |
bf1f174e DM |
2808 | regmatch() - main matching routine |
2809 | ||
2810 | This is basically one big switch statement in a loop. We execute an op, | |
2811 | set 'next' to point the next op, and continue. If we come to a point which | |
2812 | we may need to backtrack to on failure such as (A|B|C), we push a | |
2813 | backtrack state onto the backtrack stack. On failure, we pop the top | |
2814 | state, and re-enter the loop at the state indicated. If there are no more | |
2815 | states to pop, we return failure. | |
2816 | ||
2817 | Sometimes we also need to backtrack on success; for example /A+/, where | |
2818 | after successfully matching one A, we need to go back and try to | |
2819 | match another one; similarly for lookahead assertions: if the assertion | |
2820 | completes successfully, we backtrack to the state just before the assertion | |
2821 | and then carry on. In these cases, the pushed state is marked as | |
2822 | 'backtrack on success too'. This marking is in fact done by a chain of | |
2823 | pointers, each pointing to the previous 'yes' state. On success, we pop to | |
2824 | the nearest yes state, discarding any intermediate failure-only states. | |
2825 | Sometimes a yes state is pushed just to force some cleanup code to be | |
2826 | called at the end of a successful match or submatch; e.g. (??{$re}) uses | |
2827 | it to free the inner regex. | |
2828 | ||
2829 | Note that failure backtracking rewinds the cursor position, while | |
2830 | success backtracking leaves it alone. | |
2831 | ||
2832 | A pattern is complete when the END op is executed, while a subpattern | |
2833 | such as (?=foo) is complete when the SUCCESS op is executed. Both of these | |
2834 | ops trigger the "pop to last yes state if any, otherwise return true" | |
2835 | behaviour. | |
2836 | ||
2837 | A common convention in this function is to use A and B to refer to the two | |
2838 | subpatterns (or to the first nodes thereof) in patterns like /A*B/: so A is | |
2839 | the subpattern to be matched possibly multiple times, while B is the entire | |
2840 | rest of the pattern. Variable and state names reflect this convention. | |
2841 | ||
2842 | The states in the main switch are the union of ops and failure/success of | |
2843 | substates associated with with that op. For example, IFMATCH is the op | |
2844 | that does lookahead assertions /(?=A)B/ and so the IFMATCH state means | |
2845 | 'execute IFMATCH'; while IFMATCH_A is a state saying that we have just | |
2846 | successfully matched A and IFMATCH_A_fail is a state saying that we have | |
2847 | just failed to match A. Resume states always come in pairs. The backtrack | |
2848 | state we push is marked as 'IFMATCH_A', but when that is popped, we resume | |
2849 | at IFMATCH_A or IFMATCH_A_fail, depending on whether we are backtracking | |
2850 | on success or failure. | |
2851 | ||
2852 | The struct that holds a backtracking state is actually a big union, with | |
2853 | one variant for each major type of op. The variable st points to the | |
2854 | top-most backtrack struct. To make the code clearer, within each | |
2855 | block of code we #define ST to alias the relevant union. | |
2856 | ||
2857 | Here's a concrete example of a (vastly oversimplified) IFMATCH | |
2858 | implementation: | |
2859 | ||
2860 | switch (state) { | |
2861 | .... | |
2862 | ||
2863 | #define ST st->u.ifmatch | |
2864 | ||
2865 | case IFMATCH: // we are executing the IFMATCH op, (?=A)B | |
2866 | ST.foo = ...; // some state we wish to save | |
95b24440 | 2867 | ... |
bf1f174e DM |
2868 | // push a yes backtrack state with a resume value of |
2869 | // IFMATCH_A/IFMATCH_A_fail, then continue execution at the | |
2870 | // first node of A: | |
2871 | PUSH_YES_STATE_GOTO(IFMATCH_A, A); | |
2872 | // NOTREACHED | |
2873 | ||
2874 | case IFMATCH_A: // we have successfully executed A; now continue with B | |
2875 | next = B; | |
2876 | bar = ST.foo; // do something with the preserved value | |
2877 | break; | |
2878 | ||
2879 | case IFMATCH_A_fail: // A failed, so the assertion failed | |
2880 | ...; // do some housekeeping, then ... | |
2881 | sayNO; // propagate the failure | |
2882 | ||
2883 | #undef ST | |
95b24440 | 2884 | |
bf1f174e DM |
2885 | ... |
2886 | } | |
95b24440 | 2887 | |
bf1f174e DM |
2888 | For any old-timers reading this who are familiar with the old recursive |
2889 | approach, the code above is equivalent to: | |
95b24440 | 2890 | |
bf1f174e DM |
2891 | case IFMATCH: // we are executing the IFMATCH op, (?=A)B |
2892 | { | |
2893 | int foo = ... | |
95b24440 | 2894 | ... |
bf1f174e DM |
2895 | if (regmatch(A)) { |
2896 | next = B; | |
2897 | bar = foo; | |
2898 | break; | |
95b24440 | 2899 | } |
bf1f174e DM |
2900 | ...; // do some housekeeping, then ... |
2901 | sayNO; // propagate the failure | |
95b24440 | 2902 | } |
bf1f174e DM |
2903 | |
2904 | The topmost backtrack state, pointed to by st, is usually free. If you | |
2905 | want to claim it, populate any ST.foo fields in it with values you wish to | |
2906 | save, then do one of | |
2907 | ||
2908 | PUSH_STATE_GOTO(resume_state, node); | |
2909 | PUSH_YES_STATE_GOTO(resume_state, node); | |
2910 | ||
2911 | which sets that backtrack state's resume value to 'resume_state', pushes a | |
2912 | new free entry to the top of the backtrack stack, then goes to 'node'. | |
2913 | On backtracking, the free slot is popped, and the saved state becomes the | |
2914 | new free state. An ST.foo field in this new top state can be temporarily | |
2915 | accessed to retrieve values, but once the main loop is re-entered, it | |
2916 | becomes available for reuse. | |
2917 | ||
2918 | Note that the depth of the backtrack stack constantly increases during the | |
2919 | left-to-right execution of the pattern, rather than going up and down with | |
2920 | the pattern nesting. For example the stack is at its maximum at Z at the | |
2921 | end of the pattern, rather than at X in the following: | |
2922 | ||
2923 | /(((X)+)+)+....(Y)+....Z/ | |
2924 | ||
2925 | The only exceptions to this are lookahead/behind assertions and the cut, | |
2926 | (?>A), which pop all the backtrack states associated with A before | |
2927 | continuing. | |
2928 | ||
486ec47a | 2929 | Backtrack state structs are allocated in slabs of about 4K in size. |
bf1f174e DM |
2930 | PL_regmatch_state and st always point to the currently active state, |
2931 | and PL_regmatch_slab points to the slab currently containing | |
2932 | PL_regmatch_state. The first time regmatch() is called, the first slab is | |
2933 | allocated, and is never freed until interpreter destruction. When the slab | |
2934 | is full, a new one is allocated and chained to the end. At exit from | |
2935 | regmatch(), slabs allocated since entry are freed. | |
2936 | ||
2937 | */ | |
95b24440 | 2938 | |
40a82448 | 2939 | |
5bc10b2c | 2940 | #define DEBUG_STATE_pp(pp) \ |
265c4333 | 2941 | DEBUG_STATE_r({ \ |
f2ed9b32 | 2942 | DUMP_EXEC_POS(locinput, scan, utf8_target); \ |
5bc10b2c | 2943 | PerlIO_printf(Perl_debug_log, \ |
5d458dd8 | 2944 | " %*s"pp" %s%s%s%s%s\n", \ |
5bc10b2c | 2945 | depth*2, "", \ |
13d6edb4 | 2946 | PL_reg_name[st->resume_state], \ |
5d458dd8 YO |
2947 | ((st==yes_state||st==mark_state) ? "[" : ""), \ |
2948 | ((st==yes_state) ? "Y" : ""), \ | |
2949 | ((st==mark_state) ? "M" : ""), \ | |
2950 | ((st==yes_state||st==mark_state) ? "]" : "") \ | |
2951 | ); \ | |
265c4333 | 2952 | }); |
5bc10b2c | 2953 | |
40a82448 | 2954 | |
3dab1dad | 2955 | #define REG_NODE_NUM(x) ((x) ? (int)((x)-prog) : -1) |
95b24440 | 2956 | |
3df15adc | 2957 | #ifdef DEBUGGING |
5bc10b2c | 2958 | |
ab3bbdeb | 2959 | STATIC void |
f2ed9b32 | 2960 | S_debug_start_match(pTHX_ const REGEXP *prog, const bool utf8_target, |
ab3bbdeb YO |
2961 | const char *start, const char *end, const char *blurb) |
2962 | { | |
efd26800 | 2963 | const bool utf8_pat = RX_UTF8(prog) ? 1 : 0; |
7918f24d NC |
2964 | |
2965 | PERL_ARGS_ASSERT_DEBUG_START_MATCH; | |
2966 | ||
ab3bbdeb YO |
2967 | if (!PL_colorset) |
2968 | reginitcolors(); | |
2969 | { | |
2970 | RE_PV_QUOTED_DECL(s0, utf8_pat, PERL_DEBUG_PAD_ZERO(0), | |
d2c6dc5e | 2971 | RX_PRECOMP_const(prog), RX_PRELEN(prog), 60); |
ab3bbdeb | 2972 | |
f2ed9b32 | 2973 | RE_PV_QUOTED_DECL(s1, utf8_target, PERL_DEBUG_PAD_ZERO(1), |
ab3bbdeb YO |
2974 | start, end - start, 60); |
2975 | ||
2976 | PerlIO_printf(Perl_debug_log, | |
2977 | "%s%s REx%s %s against %s\n", | |
2978 | PL_colors[4], blurb, PL_colors[5], s0, s1); | |
2979 | ||
f2ed9b32 | 2980 | if (utf8_target||utf8_pat) |
1de06328 YO |
2981 | PerlIO_printf(Perl_debug_log, "UTF-8 %s%s%s...\n", |
2982 | utf8_pat ? "pattern" : "", | |
f2ed9b32 KW |
2983 | utf8_pat && utf8_target ? " and " : "", |
2984 | utf8_target ? "string" : "" | |
ab3bbdeb YO |
2985 | ); |
2986 | } | |
2987 | } | |
3df15adc YO |
2988 | |
2989 | STATIC void | |
786e8c11 YO |
2990 | S_dump_exec_pos(pTHX_ const char *locinput, |
2991 | const regnode *scan, | |
2992 | const char *loc_regeol, | |
2993 | const char *loc_bostr, | |
2994 | const char *loc_reg_starttry, | |
f2ed9b32 | 2995 | const bool utf8_target) |
07be1b83 | 2996 | { |
786e8c11 | 2997 | const int docolor = *PL_colors[0] || *PL_colors[2] || *PL_colors[4]; |
07be1b83 | 2998 | const int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */ |
786e8c11 | 2999 | int l = (loc_regeol - locinput) > taill ? taill : (loc_regeol - locinput); |
07be1b83 YO |
3000 | /* The part of the string before starttry has one color |
3001 | (pref0_len chars), between starttry and current | |
3002 | position another one (pref_len - pref0_len chars), | |
3003 | after the current position the third one. | |
3004 | We assume that pref0_len <= pref_len, otherwise we | |
3005 | decrease pref0_len. */ | |
786e8c11 YO |
3006 | int pref_len = (locinput - loc_bostr) > (5 + taill) - l |
3007 | ? (5 + taill) - l : locinput - loc_bostr; | |
07be1b83 YO |
3008 | int pref0_len; |
3009 | ||
7918f24d NC |
3010 | PERL_ARGS_ASSERT_DUMP_EXEC_POS; |
3011 | ||
f2ed9b32 | 3012 | while (utf8_target && UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len))) |
07be1b83 | 3013 | pref_len++; |
786e8c11 YO |
3014 | pref0_len = pref_len - (locinput - loc_reg_starttry); |
3015 | if (l + pref_len < (5 + taill) && l < loc_regeol - locinput) | |
3016 | l = ( loc_regeol - locinput > (5 + taill) - pref_len | |
3017 | ? (5 + taill) - pref_len : loc_regeol - locinput); | |
f2ed9b32 | 3018 | while (utf8_target && UTF8_IS_CONTINUATION(*(U8*)(locinput + l))) |
07be1b83 YO |
3019 | l--; |
3020 | if (pref0_len < 0) | |
3021 | pref0_len = 0; | |
3022 | if (pref0_len > pref_len) | |
3023 | pref0_len = pref_len; | |
3024 | { | |
f2ed9b32 | 3025 | const int is_uni = (utf8_target && OP(scan) != CANY) ? 1 : 0; |
0df25f3d | 3026 | |
ab3bbdeb | 3027 | RE_PV_COLOR_DECL(s0,len0,is_uni,PERL_DEBUG_PAD(0), |
1de06328 | 3028 | (locinput - pref_len),pref0_len, 60, 4, 5); |
0df25f3d | 3029 | |
ab3bbdeb | 3030 | RE_PV_COLOR_DECL(s1,len1,is_uni,PERL_DEBUG_PAD(1), |
3df15adc | 3031 | (locinput - pref_len + pref0_len), |
1de06328 | 3032 | pref_len - pref0_len, 60, 2, 3); |
0df25f3d | 3033 | |
ab3bbdeb | 3034 | RE_PV_COLOR_DECL(s2,len2,is_uni,PERL_DEBUG_PAD(2), |
1de06328 | 3035 | locinput, loc_regeol - locinput, 10, 0, 1); |
0df25f3d | 3036 | |
1de06328 | 3037 | const STRLEN tlen=len0+len1+len2; |
3df15adc | 3038 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb | 3039 | "%4"IVdf" <%.*s%.*s%s%.*s>%*s|", |
786e8c11 | 3040 | (IV)(locinput - loc_bostr), |
07be1b83 | 3041 | len0, s0, |
07be1b83 | 3042 | len1, s1, |
07be1b83 | 3043 | (docolor ? "" : "> <"), |
07be1b83 | 3044 | len2, s2, |
f9f4320a | 3045 | (int)(tlen > 19 ? 0 : 19 - tlen), |
07be1b83 YO |
3046 | ""); |
3047 | } | |
3048 | } | |
3df15adc | 3049 | |
07be1b83 YO |
3050 | #endif |
3051 | ||
0a4db386 YO |
3052 | /* reg_check_named_buff_matched() |
3053 | * Checks to see if a named buffer has matched. The data array of | |
3054 | * buffer numbers corresponding to the buffer is expected to reside | |
3055 | * in the regexp->data->data array in the slot stored in the ARG() of | |
3056 | * node involved. Note that this routine doesn't actually care about the | |
3057 | * name, that information is not preserved from compilation to execution. | |
3058 | * Returns the index of the leftmost defined buffer with the given name | |
3059 | * or 0 if non of the buffers matched. | |
3060 | */ | |
3061 | STATIC I32 | |
7918f24d NC |
3062 | S_reg_check_named_buff_matched(pTHX_ const regexp *rex, const regnode *scan) |
3063 | { | |
0a4db386 | 3064 | I32 n; |
f8fc2ecf | 3065 | RXi_GET_DECL(rex,rexi); |
ad64d0ec | 3066 | SV *sv_dat= MUTABLE_SV(rexi->data->data[ ARG( scan ) ]); |
0a4db386 | 3067 | I32 *nums=(I32*)SvPVX(sv_dat); |
7918f24d NC |
3068 | |
3069 | PERL_ARGS_ASSERT_REG_CHECK_NAMED_BUFF_MATCHED; | |
3070 | ||
0a4db386 | 3071 | for ( n=0; n<SvIVX(sv_dat); n++ ) { |
b93070ed DM |
3072 | if ((I32)rex->lastparen >= nums[n] && |
3073 | rex->offs[nums[n]].end != -1) | |
0a4db386 YO |
3074 | { |
3075 | return nums[n]; | |
3076 | } | |
3077 | } | |
3078 | return 0; | |
3079 | } | |
3080 | ||
2f554ef7 DM |
3081 | |
3082 | /* free all slabs above current one - called during LEAVE_SCOPE */ | |
3083 | ||
3084 | STATIC void | |
3085 | S_clear_backtrack_stack(pTHX_ void *p) | |
3086 | { | |
3087 | regmatch_slab *s = PL_regmatch_slab->next; | |
3088 | PERL_UNUSED_ARG(p); | |
3089 | ||
3090 | if (!s) | |
3091 | return; | |
3092 | PL_regmatch_slab->next = NULL; | |
3093 | while (s) { | |
3094 | regmatch_slab * const osl = s; | |
3095 | s = s->next; | |
3096 | Safefree(osl); | |
3097 | } | |
3098 | } | |
3099 | ||
3100 | ||
d6a28714 | 3101 | STATIC I32 /* 0 failure, 1 success */ |
24b23f37 | 3102 | S_regmatch(pTHX_ regmatch_info *reginfo, regnode *prog) |
d6a28714 | 3103 | { |
a35a87e7 | 3104 | #if PERL_VERSION < 9 && !defined(PERL_CORE) |
54df2634 NC |
3105 | dMY_CXT; |
3106 | #endif | |
27da23d5 | 3107 | dVAR; |
eb578fdb | 3108 | const bool utf8_target = PL_reg_match_utf8; |
4ad0818d | 3109 | const U32 uniflags = UTF8_ALLOW_DEFAULT; |
288b8c02 NC |
3110 | REGEXP *rex_sv = reginfo->prog; |
3111 | regexp *rex = (struct regexp *)SvANY(rex_sv); | |
f8fc2ecf | 3112 | RXi_GET_DECL(rex,rexi); |
2f554ef7 | 3113 | I32 oldsave; |
5d9a96ca | 3114 | /* the current state. This is a cached copy of PL_regmatch_state */ |
eb578fdb | 3115 | regmatch_state *st; |
5d9a96ca | 3116 | /* cache heavy used fields of st in registers */ |
eb578fdb KW |
3117 | regnode *scan; |
3118 | regnode *next; | |
3119 | U32 n = 0; /* general value; init to avoid compiler warning */ | |
3120 | I32 ln = 0; /* len or last; init to avoid compiler warning */ | |
3121 | char *locinput = PL_reginput; | |
3122 | I32 nextchr; /* is always set to UCHARAT(locinput) */ | |
24d3c4a9 | 3123 | |
b69b0499 | 3124 | bool result = 0; /* return value of S_regmatch */ |
24d3c4a9 | 3125 | int depth = 0; /* depth of backtrack stack */ |
4b196cd4 YO |
3126 | U32 nochange_depth = 0; /* depth of GOSUB recursion with nochange */ |
3127 | const U32 max_nochange_depth = | |
3128 | (3 * rex->nparens > MAX_RECURSE_EVAL_NOCHANGE_DEPTH) ? | |
3129 | 3 * rex->nparens : MAX_RECURSE_EVAL_NOCHANGE_DEPTH; | |
77cb431f DM |
3130 | regmatch_state *yes_state = NULL; /* state to pop to on success of |
3131 | subpattern */ | |
e2e6a0f1 YO |
3132 | /* mark_state piggy backs on the yes_state logic so that when we unwind |
3133 | the stack on success we can update the mark_state as we go */ | |
3134 | regmatch_state *mark_state = NULL; /* last mark state we have seen */ | |
faec1544 | 3135 | regmatch_state *cur_eval = NULL; /* most recent EVAL_AB state */ |
b8591aee | 3136 | struct regmatch_state *cur_curlyx = NULL; /* most recent curlyx */ |
40a82448 | 3137 | U32 state_num; |
5d458dd8 YO |
3138 | bool no_final = 0; /* prevent failure from backtracking? */ |
3139 | bool do_cutgroup = 0; /* no_final only until next branch/trie entry */ | |
e2e6a0f1 | 3140 | char *startpoint = PL_reginput; |
5d458dd8 YO |
3141 | SV *popmark = NULL; /* are we looking for a mark? */ |
3142 | SV *sv_commit = NULL; /* last mark name seen in failure */ | |
3143 | SV *sv_yes_mark = NULL; /* last mark name we have seen | |
486ec47a | 3144 | during a successful match */ |
5d458dd8 YO |
3145 | U32 lastopen = 0; /* last open we saw */ |
3146 | bool has_cutgroup = RX_HAS_CUTGROUP(rex) ? 1 : 0; | |
19b95bf0 | 3147 | SV* const oreplsv = GvSV(PL_replgv); |
24d3c4a9 DM |
3148 | /* these three flags are set by various ops to signal information to |
3149 | * the very next op. They have a useful lifetime of exactly one loop | |
3150 | * iteration, and are not preserved or restored by state pushes/pops | |
3151 | */ | |
3152 | bool sw = 0; /* the condition value in (?(cond)a|b) */ | |
3153 | bool minmod = 0; /* the next "{n,m}" is a "{n,m}?" */ | |
3154 | int logical = 0; /* the following EVAL is: | |
3155 | 0: (?{...}) | |
3156 | 1: (?(?{...})X|Y) | |
3157 | 2: (??{...}) | |
3158 | or the following IFMATCH/UNLESSM is: | |
3159 | false: plain (?=foo) | |
3160 | true: used as a condition: (?(?=foo)) | |
3161 | */ | |
81ed78b2 DM |
3162 | PAD* last_pad = NULL; |
3163 | dMULTICALL; | |
3164 | I32 gimme = G_SCALAR; | |
3165 | CV *caller_cv = NULL; /* who called us */ | |
3166 | CV *last_pushed_cv = NULL; /* most recently called (?{}) CV */ | |
74088413 | 3167 | CHECKPOINT runops_cp; /* savestack position before executing EVAL */ |
81ed78b2 | 3168 | |
95b24440 | 3169 | #ifdef DEBUGGING |
e68ec53f | 3170 | GET_RE_DEBUG_FLAGS_DECL; |
d6a28714 JH |
3171 | #endif |
3172 | ||
81ed78b2 DM |
3173 | /* shut up 'may be used uninitialized' compiler warnings for dMULTICALL */ |
3174 | multicall_oldcatch = 0; | |
3175 | multicall_cv = NULL; | |
3176 | cx = NULL; | |
4f8dbb2d JL |
3177 | PERL_UNUSED_VAR(multicall_cop); |
3178 | PERL_UNUSED_VAR(newsp); | |
81ed78b2 DM |
3179 | |
3180 | ||
7918f24d NC |
3181 | PERL_ARGS_ASSERT_REGMATCH; |
3182 | ||
3b57cd43 | 3183 | DEBUG_OPTIMISE_r( DEBUG_EXECUTE_r({ |
24b23f37 | 3184 | PerlIO_printf(Perl_debug_log,"regmatch start\n"); |
3b57cd43 | 3185 | })); |
5d9a96ca DM |
3186 | /* on first ever call to regmatch, allocate first slab */ |
3187 | if (!PL_regmatch_slab) { | |
3188 | Newx(PL_regmatch_slab, 1, regmatch_slab); | |
3189 | PL_regmatch_slab->prev = NULL; | |
3190 | PL_regmatch_slab->next = NULL; | |
86545054 | 3191 | PL_regmatch_state = SLAB_FIRST(PL_regmatch_slab); |
5d9a96ca DM |
3192 | } |
3193 | ||
2f554ef7 DM |
3194 | oldsave = PL_savestack_ix; |
3195 | SAVEDESTRUCTOR_X(S_clear_backtrack_stack, NULL); | |
3196 | SAVEVPTR(PL_regmatch_slab); | |
3197 | SAVEVPTR(PL_regmatch_state); | |
5d9a96ca DM |
3198 | |
3199 | /* grab next free state slot */ | |
3200 | st = ++PL_regmatch_state; | |
86545054 | 3201 | if (st > SLAB_LAST(PL_regmatch_slab)) |
5d9a96ca DM |
3202 | st = PL_regmatch_state = S_push_slab(aTHX); |
3203 | ||
d6a28714 JH |
3204 | /* Note that nextchr is a byte even in UTF */ |
3205 | nextchr = UCHARAT(locinput); | |
3206 | scan = prog; | |
3207 | while (scan != NULL) { | |
8ba1375e | 3208 | |
a3621e74 | 3209 | DEBUG_EXECUTE_r( { |
6136c704 | 3210 | SV * const prop = sv_newmortal(); |
1de06328 | 3211 | regnode *rnext=regnext(scan); |
f2ed9b32 | 3212 | DUMP_EXEC_POS( locinput, scan, utf8_target ); |
32fc9b6a | 3213 | regprop(rex, prop, scan); |
07be1b83 YO |
3214 | |
3215 | PerlIO_printf(Perl_debug_log, | |
3216 | "%3"IVdf":%*s%s(%"IVdf")\n", | |
f8fc2ecf | 3217 | (IV)(scan - rexi->program), depth*2, "", |
07be1b83 | 3218 | SvPVX_const(prop), |
1de06328 | 3219 | (PL_regkind[OP(scan)] == END || !rnext) ? |
f8fc2ecf | 3220 | 0 : (IV)(rnext - rexi->program)); |
2a782b5b | 3221 | }); |
d6a28714 JH |
3222 | |
3223 | next = scan + NEXT_OFF(scan); | |
3224 | if (next == scan) | |
3225 | next = NULL; | |
40a82448 | 3226 | state_num = OP(scan); |
d6a28714 | 3227 | |
40a82448 | 3228 | reenter_switch: |
34a81e2b | 3229 | |
40a82448 | 3230 | switch (state_num) { |
d6a28714 | 3231 | case BOL: |
7fba1cd6 | 3232 | if (locinput == PL_bostr) |
d6a28714 | 3233 | { |
3b0527fe | 3234 | /* reginfo->till = reginfo->bol; */ |
b8c5462f JH |
3235 | break; |
3236 | } | |
d6a28714 JH |
3237 | sayNO; |
3238 | case MBOL: | |
12d33761 HS |
3239 | if (locinput == PL_bostr || |
3240 | ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n')) | |
d6a28714 | 3241 | { |
b8c5462f JH |
3242 | break; |
3243 | } | |
d6a28714 JH |
3244 | sayNO; |
3245 | case SBOL: | |
c2a73568 | 3246 | if (locinput == PL_bostr) |
b8c5462f | 3247 | break; |
d6a28714 JH |
3248 | sayNO; |
3249 | case GPOS: | |
3b0527fe | 3250 | if (locinput == reginfo->ganch) |
d6a28714 JH |
3251 | break; |
3252 | sayNO; | |
ee9b8eae YO |
3253 | |
3254 | case KEEPS: | |
3255 | /* update the startpoint */ | |
b93070ed | 3256 | st->u.keeper.val = rex->offs[0].start; |
ee9b8eae | 3257 | PL_reginput = locinput; |
b93070ed | 3258 | rex->offs[0].start = locinput - PL_bostr; |
ee9b8eae YO |
3259 | PUSH_STATE_GOTO(KEEPS_next, next); |
3260 | /*NOT-REACHED*/ | |
3261 | case KEEPS_next_fail: | |
3262 | /* rollback the start point change */ | |
b93070ed | 3263 | rex->offs[0].start = st->u.keeper.val; |
ee9b8eae YO |
3264 | sayNO_SILENT; |
3265 | /*NOT-REACHED*/ | |
d6a28714 | 3266 | case EOL: |
d6a28714 JH |
3267 | goto seol; |
3268 | case MEOL: | |
d6a28714 | 3269 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') |
b8c5462f | 3270 | sayNO; |
b8c5462f | 3271 | break; |
d6a28714 JH |
3272 | case SEOL: |
3273 | seol: | |
3274 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') | |
b8c5462f | 3275 | sayNO; |
d6a28714 | 3276 | if (PL_regeol - locinput > 1) |
b8c5462f | 3277 | sayNO; |
b8c5462f | 3278 | break; |
d6a28714 JH |
3279 | case EOS: |
3280 | if (PL_regeol != locinput) | |
b8c5462f | 3281 | sayNO; |
d6a28714 | 3282 | break; |
ffc61ed2 | 3283 | case SANY: |
d6a28714 | 3284 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 | 3285 | sayNO; |
f2ed9b32 | 3286 | if (utf8_target) { |
f33976b4 DB |
3287 | locinput += PL_utf8skip[nextchr]; |
3288 | if (locinput > PL_regeol) | |
3289 | sayNO; | |
3290 | nextchr = UCHARAT(locinput); | |
3291 | } | |
3292 | else | |
3293 | nextchr = UCHARAT(++locinput); | |
3294 | break; | |
3295 | case CANY: | |
3296 | if (!nextchr && locinput >= PL_regeol) | |
3297 | sayNO; | |
b8c5462f | 3298 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 3299 | break; |
ffc61ed2 | 3300 | case REG_ANY: |
1aa99e6b IH |
3301 | if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n') |
3302 | sayNO; | |
f2ed9b32 | 3303 | if (utf8_target) { |
b8c5462f | 3304 | locinput += PL_utf8skip[nextchr]; |
d6a28714 JH |
3305 | if (locinput > PL_regeol) |
3306 | sayNO; | |
a0ed51b3 | 3307 | nextchr = UCHARAT(locinput); |
a0ed51b3 | 3308 | } |
1aa99e6b IH |
3309 | else |
3310 | nextchr = UCHARAT(++locinput); | |
a0ed51b3 | 3311 | break; |
166ba7cd DM |
3312 | |
3313 | #undef ST | |
3314 | #define ST st->u.trie | |
786e8c11 YO |
3315 | case TRIEC: |
3316 | /* In this case the charclass data is available inline so | |
3317 | we can fail fast without a lot of extra overhead. | |
3318 | */ | |
fab2782b YO |
3319 | if(!ANYOF_BITMAP_TEST(scan, *locinput)) { |
3320 | DEBUG_EXECUTE_r( | |
3321 | PerlIO_printf(Perl_debug_log, | |
3322 | "%*s %sfailed to match trie start class...%s\n", | |
3323 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]) | |
3324 | ); | |
3325 | sayNO_SILENT; | |
118e2215 | 3326 | assert(0); /* NOTREACHED */ |
786e8c11 YO |
3327 | } |
3328 | /* FALL THROUGH */ | |
5b47454d | 3329 | case TRIE: |
2e64971a DM |
3330 | /* the basic plan of execution of the trie is: |
3331 | * At the beginning, run though all the states, and | |
3332 | * find the longest-matching word. Also remember the position | |
3333 | * of the shortest matching word. For example, this pattern: | |
3334 | * 1 2 3 4 5 | |
3335 | * ab|a|x|abcd|abc | |
3336 | * when matched against the string "abcde", will generate | |
3337 | * accept states for all words except 3, with the longest | |
3338 | * matching word being 4, and the shortest being 1 (with | |
3339 | * the position being after char 1 of the string). | |
3340 | * | |
3341 | * Then for each matching word, in word order (i.e. 1,2,4,5), | |
3342 | * we run the remainder of the pattern; on each try setting | |
3343 | * the current position to the character following the word, | |
3344 | * returning to try the next word on failure. | |
3345 | * | |
3346 | * We avoid having to build a list of words at runtime by | |
3347 | * using a compile-time structure, wordinfo[].prev, which | |
3348 | * gives, for each word, the previous accepting word (if any). | |
3349 | * In the case above it would contain the mappings 1->2, 2->0, | |
3350 | * 3->0, 4->5, 5->1. We can use this table to generate, from | |
3351 | * the longest word (4 above), a list of all words, by | |
3352 | * following the list of prev pointers; this gives us the | |
3353 | * unordered list 4,5,1,2. Then given the current word we have | |
3354 | * just tried, we can go through the list and find the | |
3355 | * next-biggest word to try (so if we just failed on word 2, | |
3356 | * the next in the list is 4). | |
3357 | * | |
3358 | * Since at runtime we don't record the matching position in | |
3359 | * the string for each word, we have to work that out for | |
3360 | * each word we're about to process. The wordinfo table holds | |
3361 | * the character length of each word; given that we recorded | |
3362 | * at the start: the position of the shortest word and its | |
3363 | * length in chars, we just need to move the pointer the | |
3364 | * difference between the two char lengths. Depending on | |
3365 | * Unicode status and folding, that's cheap or expensive. | |
3366 | * | |
3367 | * This algorithm is optimised for the case where are only a | |
3368 | * small number of accept states, i.e. 0,1, or maybe 2. | |
3369 | * With lots of accepts states, and having to try all of them, | |
3370 | * it becomes quadratic on number of accept states to find all | |
3371 | * the next words. | |
3372 | */ | |
3373 | ||
3dab1dad | 3374 | { |
07be1b83 | 3375 | /* what type of TRIE am I? (utf8 makes this contextual) */ |
a0a388a1 | 3376 | DECL_TRIE_TYPE(scan); |
3dab1dad YO |
3377 | |
3378 | /* what trie are we using right now */ | |
be8e71aa | 3379 | reg_trie_data * const trie |
f8fc2ecf | 3380 | = (reg_trie_data*)rexi->data->data[ ARG( scan ) ]; |
85fbaab2 | 3381 | HV * widecharmap = MUTABLE_HV(rexi->data->data[ ARG( scan ) + 1 ]); |
3dab1dad | 3382 | U32 state = trie->startstate; |
166ba7cd | 3383 | |
fab2782b | 3384 | if (trie->bitmap && !TRIE_BITMAP_TEST(trie,*locinput) ) { |
3dab1dad YO |
3385 | if (trie->states[ state ].wordnum) { |
3386 | DEBUG_EXECUTE_r( | |
3387 | PerlIO_printf(Perl_debug_log, | |
3388 | "%*s %smatched empty string...%s\n", | |
5bc10b2c | 3389 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]) |
3dab1dad | 3390 | ); |
20dbff7c YO |
3391 | if (!trie->jump) |
3392 | break; | |
3dab1dad YO |
3393 | } else { |
3394 | DEBUG_EXECUTE_r( | |
3395 | PerlIO_printf(Perl_debug_log, | |
786e8c11 | 3396 | "%*s %sfailed to match trie start class...%s\n", |
5bc10b2c | 3397 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]) |
3dab1dad YO |
3398 | ); |
3399 | sayNO_SILENT; | |
3400 | } | |
3401 | } | |
166ba7cd | 3402 | |
786e8c11 YO |
3403 | { |
3404 | U8 *uc = ( U8* )locinput; | |
3405 | ||
3406 | STRLEN len = 0; | |
3407 | STRLEN foldlen = 0; | |
3408 | U8 *uscan = (U8*)NULL; | |
786e8c11 | 3409 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; |
2e64971a DM |
3410 | U32 charcount = 0; /* how many input chars we have matched */ |
3411 | U32 accepted = 0; /* have we seen any accepting states? */ | |
786e8c11 | 3412 | |
786e8c11 | 3413 | ST.jump = trie->jump; |
786e8c11 | 3414 | ST.me = scan; |
2e64971a DM |
3415 | ST.firstpos = NULL; |
3416 | ST.longfold = FALSE; /* char longer if folded => it's harder */ | |
3417 | ST.nextword = 0; | |
3418 | ||
3419 | /* fully traverse the TRIE; note the position of the | |
3420 | shortest accept state and the wordnum of the longest | |
3421 | accept state */ | |
07be1b83 | 3422 | |
a3621e74 | 3423 | while ( state && uc <= (U8*)PL_regeol ) { |
786e8c11 | 3424 | U32 base = trie->states[ state ].trans.base; |
f9f4320a | 3425 | UV uvc = 0; |
acb909b4 | 3426 | U16 charid = 0; |
2e64971a DM |
3427 | U16 wordnum; |
3428 | wordnum = trie->states[ state ].wordnum; | |
3429 | ||
3430 | if (wordnum) { /* it's an accept state */ | |
3431 | if (!accepted) { | |
3432 | accepted = 1; | |
3433 | /* record first match position */ | |
3434 | if (ST.longfold) { | |
3435 | ST.firstpos = (U8*)locinput; | |
3436 | ST.firstchars = 0; | |
5b47454d | 3437 | } |
2e64971a DM |
3438 | else { |
3439 | ST.firstpos = uc; | |
3440 | ST.firstchars = charcount; | |
3441 | } | |
3442 | } | |
3443 | if (!ST.nextword || wordnum < ST.nextword) | |
3444 | ST.nextword = wordnum; | |
3445 | ST.topword = wordnum; | |
786e8c11 | 3446 | } |
a3621e74 | 3447 | |
07be1b83 | 3448 | DEBUG_TRIE_EXECUTE_r({ |
f2ed9b32 | 3449 | DUMP_EXEC_POS( (char *)uc, scan, utf8_target ); |
a3621e74 | 3450 | PerlIO_printf( Perl_debug_log, |
2e64971a | 3451 | "%*s %sState: %4"UVxf" Accepted: %c ", |
5bc10b2c | 3452 | 2+depth * 2, "", PL_colors[4], |
2e64971a | 3453 | (UV)state, (accepted ? 'Y' : 'N')); |
07be1b83 | 3454 | }); |
a3621e74 | 3455 | |
2e64971a | 3456 | /* read a char and goto next state */ |
a3621e74 | 3457 | if ( base ) { |
6dd2be57 | 3458 | I32 offset; |
55eed653 NC |
3459 | REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, |
3460 | uscan, len, uvc, charid, foldlen, | |
3461 | foldbuf, uniflags); | |
2e64971a DM |
3462 | charcount++; |
3463 | if (foldlen>0) | |
3464 | ST.longfold = TRUE; | |
5b47454d | 3465 | if (charid && |
6dd2be57 DM |
3466 | ( ((offset = |
3467 | base + charid - 1 - trie->uniquecharcount)) >= 0) | |
3468 | ||
3469 | && ((U32)offset < trie->lasttrans) | |
3470 | && trie->trans[offset].check == state) | |
5b47454d | 3471 | { |
6dd2be57 | 3472 | state = trie->trans[offset].next; |
5b47454d DM |
3473 | } |
3474 | else { | |
3475 | state = 0; | |
3476 | } | |
3477 | uc += len; | |
3478 | ||
3479 | } | |
3480 | else { | |
a3621e74 YO |
3481 | state = 0; |
3482 | } | |
3483 | DEBUG_TRIE_EXECUTE_r( | |
e4584336 | 3484 | PerlIO_printf( Perl_debug_log, |
786e8c11 | 3485 | "Charid:%3x CP:%4"UVxf" After State: %4"UVxf"%s\n", |
e4584336 | 3486 | charid, uvc, (UV)state, PL_colors[5] ); |
a3621e74 YO |
3487 | ); |
3488 | } | |
2e64971a | 3489 | if (!accepted) |
a3621e74 | 3490 | sayNO; |
a3621e74 | 3491 | |
2e64971a DM |
3492 | /* calculate total number of accept states */ |
3493 | { | |
3494 | U16 w = ST.topword; | |
3495 | accepted = 0; | |
3496 | while (w) { | |
3497 | w = trie->wordinfo[w].prev; | |
3498 | accepted++; | |
3499 | } | |
3500 | ST.accepted = accepted; | |
3501 | } | |
3502 | ||
166ba7cd DM |
3503 | DEBUG_EXECUTE_r( |
3504 | PerlIO_printf( Perl_debug_log, | |
3505 | "%*s %sgot %"IVdf" possible matches%s\n", | |
5bc10b2c | 3506 | REPORT_CODE_OFF + depth * 2, "", |
166ba7cd DM |
3507 | PL_colors[4], (IV)ST.accepted, PL_colors[5] ); |
3508 | ); | |
2e64971a | 3509 | goto trie_first_try; /* jump into the fail handler */ |
786e8c11 | 3510 | }} |
118e2215 | 3511 | assert(0); /* NOTREACHED */ |
2e64971a DM |
3512 | |
3513 | case TRIE_next_fail: /* we failed - try next alternative */ | |
fae667d5 YO |
3514 | if ( ST.jump) { |
3515 | REGCP_UNWIND(ST.cp); | |
a8d1f4b4 | 3516 | UNWIND_PAREN(ST.lastparen, ST.lastcloseparen); |
fae667d5 | 3517 | } |
2e64971a DM |
3518 | if (!--ST.accepted) { |
3519 | DEBUG_EXECUTE_r({ | |
3520 | PerlIO_printf( Perl_debug_log, | |
3521 | "%*s %sTRIE failed...%s\n", | |
3522 | REPORT_CODE_OFF+depth*2, "", | |
3523 | PL_colors[4], | |
3524 | PL_colors[5] ); | |
3525 | }); | |
3526 | sayNO_SILENT; | |
3527 | } | |
3528 | { | |
3529 | /* Find next-highest word to process. Note that this code | |
3530 | * is O(N^2) per trie run (O(N) per branch), so keep tight */ | |
eb578fdb KW |
3531 | U16 min = 0; |
3532 | U16 word; | |
3533 | U16 const nextword = ST.nextword; | |
3534 | reg_trie_wordinfo * const wordinfo | |
2e64971a DM |
3535 | = ((reg_trie_data*)rexi->data->data[ARG(ST.me)])->wordinfo; |
3536 | for (word=ST.topword; word; word=wordinfo[word].prev) { | |
3537 | if (word > nextword && (!min || word < min)) | |
3538 | min = word; | |
3539 | } | |
3540 | ST.nextword = min; | |
3541 | } | |
3542 | ||
fae667d5 | 3543 | trie_first_try: |
5d458dd8 YO |
3544 | if (do_cutgroup) { |
3545 | do_cutgroup = 0; | |
3546 | no_final = 0; | |
3547 | } | |
fae667d5 YO |
3548 | |
3549 | if ( ST.jump) { | |
b93070ed | 3550 | ST.lastparen = rex->lastparen; |
f6033a9d | 3551 | ST.lastcloseparen = rex->lastcloseparen; |
fae667d5 | 3552 | REGCP_SET(ST.cp); |
2e64971a | 3553 | } |
a3621e74 | 3554 | |
2e64971a | 3555 | /* find start char of end of current word */ |
166ba7cd | 3556 | { |
2e64971a DM |
3557 | U32 chars; /* how many chars to skip */ |
3558 | U8 *uc = ST.firstpos; | |
3559 | reg_trie_data * const trie | |
3560 | = (reg_trie_data*)rexi->data->data[ARG(ST.me)]; | |
3561 | ||
3562 | assert((trie->wordinfo[ST.nextword].len - trie->prefixlen) | |
3563 | >= ST.firstchars); | |
3564 | chars = (trie->wordinfo[ST.nextword].len - trie->prefixlen) | |
3565 | - ST.firstchars; | |
3566 | ||
3567 | if (ST.longfold) { | |
3568 | /* the hard option - fold each char in turn and find | |
3569 | * its folded length (which may be different */ | |
3570 | U8 foldbuf[UTF8_MAXBYTES_CASE + 1]; | |
3571 | STRLEN foldlen; | |
3572 | STRLEN len; | |
d9a396a3 | 3573 | UV uvc; |
2e64971a DM |
3574 | U8 *uscan; |
3575 | ||
3576 | while (chars) { | |
f2ed9b32 | 3577 | if (utf8_target) { |
2e64971a DM |
3578 | uvc = utf8n_to_uvuni((U8*)uc, UTF8_MAXLEN, &len, |
3579 | uniflags); | |
3580 | uc += len; | |
3581 | } | |
3582 | else { | |
3583 | uvc = *uc; | |
3584 | uc++; | |
3585 | } | |
3586 | uvc = to_uni_fold(uvc, foldbuf, &foldlen); | |
3587 | uscan = foldbuf; | |
3588 | while (foldlen) { | |
3589 | if (!--chars) | |
3590 | break; | |
3591 | uvc = utf8n_to_uvuni(uscan, UTF8_MAXLEN, &len, | |
3592 | uniflags); | |
3593 | uscan += len; | |
3594 | foldlen -= len; | |
3595 | } | |
3596 | } | |
a3621e74 | 3597 | } |
2e64971a | 3598 | else { |
f2ed9b32 | 3599 | if (utf8_target) |
2e64971a DM |
3600 | while (chars--) |
3601 | uc += UTF8SKIP(uc); | |
3602 | else | |
3603 | uc += chars; | |
3604 | } | |
3605 | PL_reginput = (char *)uc; | |
3606 | } | |
166ba7cd | 3607 | |
6603fe3e DM |
3608 | scan = ST.me + ((ST.jump && ST.jump[ST.nextword]) |
3609 | ? ST.jump[ST.nextword] | |
3610 | : NEXT_OFF(ST.me)); | |
166ba7cd | 3611 | |
2e64971a DM |
3612 | DEBUG_EXECUTE_r({ |
3613 | PerlIO_printf( Perl_debug_log, | |
3614 | "%*s %sTRIE matched word #%d, continuing%s\n", | |
3615 | REPORT_CODE_OFF+depth*2, "", | |
3616 | PL_colors[4], | |
3617 | ST.nextword, | |
3618 | PL_colors[5] | |
3619 | ); | |
3620 | }); | |
3621 | ||
3622 | if (ST.accepted > 1 || has_cutgroup) { | |
3623 | PUSH_STATE_GOTO(TRIE_next, scan); | |
118e2215 | 3624 | assert(0); /* NOTREACHED */ |
166ba7cd | 3625 | } |
2e64971a DM |
3626 | /* only one choice left - just continue */ |
3627 | DEBUG_EXECUTE_r({ | |
3628 | AV *const trie_words | |
3629 | = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]); | |
3630 | SV ** const tmp = av_fetch( trie_words, | |
3631 | ST.nextword-1, 0 ); | |
3632 | SV *sv= tmp ? sv_newmortal() : NULL; | |
3633 | ||
3634 | PerlIO_printf( Perl_debug_log, | |
3635 | "%*s %sonly one match left, short-circuiting: #%d <%s>%s\n", | |
3636 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], | |
3637 | ST.nextword, | |
3638 | tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0, | |
3639 | PL_colors[0], PL_colors[1], | |
c89df6cf | 3640 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0)|PERL_PV_ESCAPE_NONASCII |
2e64971a DM |
3641 | ) |
3642 | : "not compiled under -Dr", | |
3643 | PL_colors[5] ); | |
3644 | }); | |
3645 | ||
3646 | locinput = PL_reginput; | |
3647 | nextchr = UCHARAT(locinput); | |
3648 | continue; /* execute rest of RE */ | |
118e2215 | 3649 | assert(0); /* NOTREACHED */ |
166ba7cd DM |
3650 | #undef ST |
3651 | ||
95b24440 DM |
3652 | case EXACT: { |
3653 | char *s = STRING(scan); | |
24d3c4a9 | 3654 | ln = STR_LEN(scan); |
f2ed9b32 | 3655 | if (utf8_target != UTF_PATTERN) { |
bc517b45 | 3656 | /* The target and the pattern have differing utf8ness. */ |
1aa99e6b | 3657 | char *l = locinput; |
24d3c4a9 | 3658 | const char * const e = s + ln; |
a72c7584 | 3659 | |
f2ed9b32 | 3660 | if (utf8_target) { |
5ff6fc6d | 3661 | /* The target is utf8, the pattern is not utf8. */ |
1aa99e6b | 3662 | while (s < e) { |
a3b680e6 | 3663 | STRLEN ulen; |
1aa99e6b | 3664 | if (l >= PL_regeol) |
5ff6fc6d JH |
3665 | sayNO; |
3666 | if (NATIVE_TO_UNI(*(U8*)s) != | |
89ebb4a3 | 3667 | utf8n_to_uvuni((U8*)l, UTF8_MAXBYTES, &ulen, |
041457d9 | 3668 | uniflags)) |
5ff6fc6d | 3669 | sayNO; |
bc517b45 | 3670 | l += ulen; |
5ff6fc6d | 3671 | s ++; |
1aa99e6b | 3672 | } |
5ff6fc6d JH |
3673 | } |
3674 | else { | |
3675 | /* The target is not utf8, the pattern is utf8. */ | |
1aa99e6b | 3676 | while (s < e) { |
a3b680e6 | 3677 | STRLEN ulen; |
1aa99e6b IH |
3678 | if (l >= PL_regeol) |
3679 | sayNO; | |
5ff6fc6d | 3680 | if (NATIVE_TO_UNI(*((U8*)l)) != |
89ebb4a3 | 3681 | utf8n_to_uvuni((U8*)s, UTF8_MAXBYTES, &ulen, |
041457d9 | 3682 | uniflags)) |
1aa99e6b | 3683 | sayNO; |
bc517b45 | 3684 | s += ulen; |
a72c7584 | 3685 | l ++; |
1aa99e6b | 3686 | } |
5ff6fc6d | 3687 | } |
1aa99e6b IH |
3688 | locinput = l; |
3689 | nextchr = UCHARAT(locinput); | |
3690 | break; | |
3691 | } | |
bc517b45 | 3692 | /* The target and the pattern have the same utf8ness. */ |
d6a28714 JH |
3693 | /* Inline the first character, for speed. */ |
3694 | if (UCHARAT(s) != nextchr) | |
3695 | sayNO; | |
24d3c4a9 | 3696 | if (PL_regeol - locinput < ln) |
d6a28714 | 3697 | sayNO; |
24d3c4a9 | 3698 | if (ln > 1 && memNE(s, locinput, ln)) |
d6a28714 | 3699 | sayNO; |
24d3c4a9 | 3700 | locinput += ln; |
d6a28714 JH |
3701 | nextchr = UCHARAT(locinput); |
3702 | break; | |
95b24440 | 3703 | } |
9a5a5549 | 3704 | case EXACTFL: { |
a932d541 | 3705 | re_fold_t folder; |
9a5a5549 KW |
3706 | const U8 * fold_array; |
3707 | const char * s; | |
d513472c | 3708 | U32 fold_utf8_flags; |
9a5a5549 | 3709 | |
b8c5462f | 3710 | PL_reg_flags |= RF_tainted; |
9a5a5549 KW |
3711 | folder = foldEQ_locale; |
3712 | fold_array = PL_fold_locale; | |
17580e7a | 3713 | fold_utf8_flags = FOLDEQ_UTF8_LOCALE; |
9a5a5549 KW |
3714 | goto do_exactf; |
3715 | ||
3c760661 | 3716 | case EXACTFU_SS: |
fab2782b | 3717 | case EXACTFU_TRICKYFOLD: |
9a5a5549 KW |
3718 | case EXACTFU: |
3719 | folder = foldEQ_latin1; | |
3720 | fold_array = PL_fold_latin1; | |
2daa8fee | 3721 | fold_utf8_flags = (UTF_PATTERN) ? FOLDEQ_S1_ALREADY_FOLDED : 0; |
9a5a5549 KW |
3722 | goto do_exactf; |
3723 | ||
2f7f8cb1 KW |
3724 | case EXACTFA: |
3725 | folder = foldEQ_latin1; | |
3726 | fold_array = PL_fold_latin1; | |
57014d77 | 3727 | fold_utf8_flags = FOLDEQ_UTF8_NOMIX_ASCII; |
2f7f8cb1 KW |
3728 | goto do_exactf; |
3729 | ||
9a5a5549 KW |
3730 | case EXACTF: |
3731 | folder = foldEQ; | |
3732 | fold_array = PL_fold; | |
62bf7766 | 3733 | fold_utf8_flags = 0; |
9a5a5549 KW |
3734 | |
3735 | do_exactf: | |
3736 | s = STRING(scan); | |
24d3c4a9 | 3737 | ln = STR_LEN(scan); |
d6a28714 | 3738 | |
3c760661 KW |
3739 | if (utf8_target || UTF_PATTERN || state_num == EXACTFU_SS) { |
3740 | /* Either target or the pattern are utf8, or has the issue where | |
3741 | * the fold lengths may differ. */ | |
be8e71aa | 3742 | const char * const l = locinput; |
d07ddd77 | 3743 | char *e = PL_regeol; |
bc517b45 | 3744 | |
d513472c | 3745 | if (! foldEQ_utf8_flags(s, 0, ln, cBOOL(UTF_PATTERN), |
fa5b1667 | 3746 | l, &e, 0, utf8_target, fold_utf8_flags)) |
c3e1d013 KW |
3747 | { |
3748 | sayNO; | |
5486206c | 3749 | } |
d07ddd77 JH |
3750 | locinput = e; |
3751 | nextchr = UCHARAT(locinput); | |
3752 | break; | |
a0ed51b3 | 3753 | } |
d6a28714 | 3754 | |
0a138b74 | 3755 | /* Neither the target nor the pattern are utf8 */ |
d6a28714 | 3756 | if (UCHARAT(s) != nextchr && |
9a5a5549 KW |
3757 | UCHARAT(s) != fold_array[nextchr]) |
3758 | { | |
a0ed51b3 | 3759 | sayNO; |
9a5a5549 | 3760 | } |
24d3c4a9 | 3761 | if (PL_regeol - locinput < ln) |
b8c5462f | 3762 | sayNO; |
9a5a5549 | 3763 | if (ln > 1 && ! folder(s, locinput, ln)) |
4633a7c4 | 3764 | sayNO; |
24d3c4a9 | 3765 | locinput += ln; |
d6a28714 | 3766 | nextchr = UCHARAT(locinput); |
a0d0e21e | 3767 | break; |
9a5a5549 | 3768 | } |
63ac0dad KW |
3769 | |
3770 | /* XXX Could improve efficiency by separating these all out using a | |
3771 | * macro or in-line function. At that point regcomp.c would no longer | |
3772 | * have to set the FLAGS fields of these */ | |
b2680017 YO |
3773 | case BOUNDL: |
3774 | case NBOUNDL: | |
3775 | PL_reg_flags |= RF_tainted; | |
3776 | /* FALL THROUGH */ | |
3777 | case BOUND: | |
63ac0dad | 3778 | case BOUNDU: |
cfaf538b | 3779 | case BOUNDA: |
b2680017 | 3780 | case NBOUND: |
63ac0dad | 3781 | case NBOUNDU: |
cfaf538b | 3782 | case NBOUNDA: |
b2680017 | 3783 | /* was last char in word? */ |
f2e96b5d KW |
3784 | if (utf8_target |
3785 | && FLAGS(scan) != REGEX_ASCII_RESTRICTED_CHARSET | |
3786 | && FLAGS(scan) != REGEX_ASCII_MORE_RESTRICTED_CHARSET) | |
3787 | { | |
b2680017 YO |
3788 | if (locinput == PL_bostr) |
3789 | ln = '\n'; | |
3790 | else { | |
3791 | const U8 * const r = reghop3((U8*)locinput, -1, (U8*)PL_bostr); | |
3792 | ||
3793 | ln = utf8n_to_uvchr(r, UTF8SKIP(r), 0, uniflags); | |
3794 | } | |
63ac0dad | 3795 | if (FLAGS(scan) != REGEX_LOCALE_CHARSET) { |
b2680017 YO |
3796 | ln = isALNUM_uni(ln); |
3797 | LOAD_UTF8_CHARCLASS_ALNUM(); | |
f2ed9b32 | 3798 | n = swash_fetch(PL_utf8_alnum, (U8*)locinput, utf8_target); |
b2680017 YO |
3799 | } |
3800 | else { | |
3801 | ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln)); | |
3802 | n = isALNUM_LC_utf8((U8*)locinput); | |
3803 | } | |
3804 | } | |
3805 | else { | |
cfaf538b KW |
3806 | |
3807 | /* Here the string isn't utf8, or is utf8 and only ascii | |
3808 | * characters are to match \w. In the latter case looking at | |
3809 | * the byte just prior to the current one may be just the final | |
3810 | * byte of a multi-byte character. This is ok. There are two | |
3811 | * cases: | |
3812 | * 1) it is a single byte character, and then the test is doing | |
3813 | * just what it's supposed to. | |
3814 | * 2) it is a multi-byte character, in which case the final | |
3815 | * byte is never mistakable for ASCII, and so the test | |
3816 | * will say it is not a word character, which is the | |
3817 | * correct answer. */ | |
b2680017 YO |
3818 | ln = (locinput != PL_bostr) ? |
3819 | UCHARAT(locinput - 1) : '\n'; | |
63ac0dad KW |
3820 | switch (FLAGS(scan)) { |
3821 | case REGEX_UNICODE_CHARSET: | |
3822 | ln = isWORDCHAR_L1(ln); | |
3823 | n = isWORDCHAR_L1(nextchr); | |
3824 | break; | |
3825 | case REGEX_LOCALE_CHARSET: | |
3826 | ln = isALNUM_LC(ln); | |
3827 | n = isALNUM_LC(nextchr); | |
3828 | break; | |
3829 | case REGEX_DEPENDS_CHARSET: | |
3830 | ln = isALNUM(ln); | |
3831 | n = isALNUM(nextchr); | |
3832 | break; | |
cfaf538b | 3833 | case REGEX_ASCII_RESTRICTED_CHARSET: |
c973bd4f | 3834 | case REGEX_ASCII_MORE_RESTRICTED_CHARSET: |
cfaf538b KW |
3835 | ln = isWORDCHAR_A(ln); |
3836 | n = isWORDCHAR_A(nextchr); | |
3837 | break; | |
63ac0dad KW |
3838 | default: |
3839 | Perl_croak(aTHX_ "panic: Unexpected FLAGS %u in op %u", FLAGS(scan), OP(scan)); | |
3840 | break; | |
b2680017 YO |
3841 | } |
3842 | } | |
63ac0dad KW |
3843 | /* Note requires that all BOUNDs be lower than all NBOUNDs in |
3844 | * regcomp.sym */ | |
3845 | if (((!ln) == (!n)) == (OP(scan) < NBOUND)) | |
b2680017 YO |
3846 | sayNO; |
3847 | break; | |
f56b6394 | 3848 | case ANYOFV: |
d6a28714 | 3849 | case ANYOF: |
f56b6394 | 3850 | if (utf8_target || state_num == ANYOFV) { |
9e55ce06 | 3851 | STRLEN inclasslen = PL_regeol - locinput; |
20ed0b26 KW |
3852 | if (locinput >= PL_regeol) |
3853 | sayNO; | |
9e55ce06 | 3854 | |
f2ed9b32 | 3855 | if (!reginclass(rex, scan, (U8*)locinput, &inclasslen, utf8_target)) |
09b08e9b | 3856 | sayNO; |
b32d7d3e | 3857 | locinput += inclasslen; |
b8c5462f | 3858 | nextchr = UCHARAT(locinput); |
e0f9d4a8 | 3859 | break; |
ffc61ed2 JH |
3860 | } |
3861 | else { | |
3862 | if (nextchr < 0) | |
3863 | nextchr = UCHARAT(locinput); | |
ffc61ed2 JH |
3864 | if (!nextchr && locinput >= PL_regeol) |
3865 | sayNO; | |
20ed0b26 | 3866 | if (!REGINCLASS(rex, scan, (U8*)locinput)) |
09b08e9b | 3867 | sayNO; |
ffc61ed2 | 3868 | nextchr = UCHARAT(++locinput); |
e0f9d4a8 JH |
3869 | break; |
3870 | } | |
b8c5462f | 3871 | break; |
20d0b1e9 | 3872 | /* Special char classes - The defines start on line 129 or so */ |
ee9a90b8 KW |
3873 | CCC_TRY_U(ALNUM, NALNUM, isWORDCHAR, |
3874 | ALNUML, NALNUML, isALNUM_LC, isALNUM_LC_utf8, | |
3875 | ALNUMU, NALNUMU, isWORDCHAR_L1, | |
cfaf538b | 3876 | ALNUMA, NALNUMA, isWORDCHAR_A, |
779d7b58 | 3877 | alnum, "a"); |
ee9a90b8 KW |
3878 | |
3879 | CCC_TRY_U(SPACE, NSPACE, isSPACE, | |
3880 | SPACEL, NSPACEL, isSPACE_LC, isSPACE_LC_utf8, | |
3881 | SPACEU, NSPACEU, isSPACE_L1, | |
cfaf538b | 3882 | SPACEA, NSPACEA, isSPACE_A, |
779d7b58 | 3883 | space, " "); |
ee9a90b8 KW |
3884 | |
3885 | CCC_TRY(DIGIT, NDIGIT, isDIGIT, | |
3886 | DIGITL, NDIGITL, isDIGIT_LC, isDIGIT_LC_utf8, | |
cfaf538b | 3887 | DIGITA, NDIGITA, isDIGIT_A, |
779d7b58 | 3888 | digit, "0"); |
20d0b1e9 | 3889 | |
0658cdde KW |
3890 | case POSIXA: |
3891 | if (locinput >= PL_regeol || ! _generic_isCC_A(nextchr, FLAGS(scan))) { | |
3892 | sayNO; | |
3893 | } | |
3894 | /* Matched a utf8-invariant, so don't have to worry about utf8 */ | |
3895 | nextchr = UCHARAT(++locinput); | |
3896 | break; | |
3897 | case NPOSIXA: | |
3898 | if (locinput >= PL_regeol || _generic_isCC_A(nextchr, FLAGS(scan))) { | |
3899 | sayNO; | |
3900 | } | |
3901 | if (utf8_target) { | |
3902 | locinput += PL_utf8skip[nextchr]; | |
3903 | nextchr = UCHARAT(locinput); | |
3904 | } | |
3905 | else { | |
3906 | nextchr = UCHARAT(++locinput); | |
3907 | } | |
3908 | break; | |
3909 | ||
37e2e78e KW |
3910 | case CLUMP: /* Match \X: logical Unicode character. This is defined as |
3911 | a Unicode extended Grapheme Cluster */ | |
3912 | /* From http://www.unicode.org/reports/tr29 (5.2 version). An | |
3913 | extended Grapheme Cluster is: | |
3914 | ||
3915 | CR LF | |
3916 | | Prepend* Begin Extend* | |
3917 | | . | |
3918 | ||
1e958ea9 KW |
3919 | Begin is: ( Special_Begin | ! Control ) |
3920 | Special_Begin is: ( Regional-Indicator+ | Hangul-syllable ) | |
3921 | Extend is: ( Grapheme_Extend | Spacing_Mark ) | |
3922 | Control is: [ GCB_Control CR LF ] | |
3923 | Hangul-syllable is: ( T+ | ( L* ( L | ( LVT | ( V | LV ) V* ) T* ) )) | |
37e2e78e | 3924 | |
27d4fc33 KW |
3925 | If we create a 'Regular_Begin' = Begin - Special_Begin, then |
3926 | we can rewrite | |
3927 | ||
3928 | Begin is ( Regular_Begin + Special Begin ) | |
3929 | ||
3930 | It turns out that 98.4% of all Unicode code points match | |
3931 | Regular_Begin. Doing it this way eliminates a table match in | |
3932 | the previouls implementation for almost all Unicode code points. | |
3933 | ||
37e2e78e KW |
3934 | There is a subtlety with Prepend* which showed up in testing. |
3935 | Note that the Begin, and only the Begin is required in: | |
3936 | | Prepend* Begin Extend* | |
cc3b396d KW |
3937 | Also, Begin contains '! Control'. A Prepend must be a |
3938 | '! Control', which means it must also be a Begin. What it | |
3939 | comes down to is that if we match Prepend* and then find no | |
3940 | suitable Begin afterwards, that if we backtrack the last | |
3941 | Prepend, that one will be a suitable Begin. | |
37e2e78e KW |
3942 | */ |
3943 | ||
b7c83a7e | 3944 | if (locinput >= PL_regeol) |
a0ed51b3 | 3945 | sayNO; |
f2ed9b32 | 3946 | if (! utf8_target) { |
37e2e78e KW |
3947 | |
3948 | /* Match either CR LF or '.', as all the other possibilities | |
3949 | * require utf8 */ | |
3950 | locinput++; /* Match the . or CR */ | |
cc3b396d KW |
3951 | if (nextchr == '\r' /* And if it was CR, and the next is LF, |
3952 | match the LF */ | |
37e2e78e KW |
3953 | && locinput < PL_regeol |
3954 | && UCHARAT(locinput) == '\n') locinput++; | |
3955 | } | |
3956 | else { | |
3957 | ||
3958 | /* Utf8: See if is ( CR LF ); already know that locinput < | |
3959 | * PL_regeol, so locinput+1 is in bounds */ | |
3960 | if (nextchr == '\r' && UCHARAT(locinput + 1) == '\n') { | |
3961 | locinput += 2; | |
3962 | } | |
3963 | else { | |
3964 | /* In case have to backtrack to beginning, then match '.' */ | |
3965 | char *starting = locinput; | |
3966 | ||
3967 | /* In case have to backtrack the last prepend */ | |
3968 | char *previous_prepend = 0; | |
3969 | ||
3970 | LOAD_UTF8_CHARCLASS_GCB(); | |
3971 | ||
a1853d78 KW |
3972 | /* Match (prepend)*, but don't bother trying if empty (as |
3973 | * being set to _undef indicates) */ | |
3974 | if (PL_utf8_X_prepend != &PL_sv_undef) { | |
72167004 KW |
3975 | while (locinput < PL_regeol |
3976 | && swash_fetch(PL_utf8_X_prepend, | |
3977 | (U8*)locinput, utf8_target)) | |
3978 | { | |
3979 | previous_prepend = locinput; | |
3980 | locinput += UTF8SKIP(locinput); | |
3981 | } | |
a1853d78 | 3982 | } |
37e2e78e KW |
3983 | |
3984 | /* As noted above, if we matched a prepend character, but | |
3985 | * the next thing won't match, back off the last prepend we | |
3986 | * matched, as it is guaranteed to match the begin */ | |
3987 | if (previous_prepend | |
3988 | && (locinput >= PL_regeol | |
27d4fc33 | 3989 | || ! swash_fetch(PL_utf8_X_regular_begin, |
f2ed9b32 | 3990 | (U8*)locinput, utf8_target))) |
37e2e78e KW |
3991 | { |
3992 | locinput = previous_prepend; | |
3993 | } | |
3994 | ||
3995 | /* Note that here we know PL_regeol > locinput, as we | |
3996 | * tested that upon input to this switch case, and if we | |
3997 | * moved locinput forward, we tested the result just above | |
3998 | * and it either passed, or we backed off so that it will | |
3999 | * now pass */ | |
11dfcd49 KW |
4000 | if (swash_fetch(PL_utf8_X_regular_begin, |
4001 | (U8*)locinput, utf8_target)) { | |
27d4fc33 KW |
4002 | locinput += UTF8SKIP(locinput); |
4003 | } | |
4004 | else if (! swash_fetch(PL_utf8_X_special_begin, | |
4005 | (U8*)locinput, utf8_target)) | |
4006 | { | |
37e2e78e KW |
4007 | |
4008 | /* Here did not match the required 'Begin' in the | |
4009 | * second term. So just match the very first | |
4010 | * character, the '.' of the final term of the regex */ | |
4011 | locinput = starting + UTF8SKIP(starting); | |
27d4fc33 | 4012 | goto exit_utf8; |
37e2e78e KW |
4013 | } else { |
4014 | ||
11dfcd49 KW |
4015 | /* Here is a special begin. It can be composed of |
4016 | * several individual characters. One possibility is | |
4017 | * RI+ */ | |
4018 | if (swash_fetch(PL_utf8_X_RI, | |
4019 | (U8*)locinput, utf8_target)) | |
4020 | { | |
4021 | locinput += UTF8SKIP(locinput); | |
4022 | while (locinput < PL_regeol | |
4023 | && swash_fetch(PL_utf8_X_RI, | |
4024 | (U8*)locinput, utf8_target)) | |
4025 | { | |
cd94d768 | 4026 | locinput += UTF8SKIP(locinput); |
11dfcd49 KW |
4027 | } |
4028 | } else /* Another possibility is T+ */ | |
4029 | if (swash_fetch(PL_utf8_X_T, | |
4030 | (U8*)locinput, utf8_target)) | |
4031 | { | |
4032 | locinput += UTF8SKIP(locinput); | |
4033 | while (locinput < PL_regeol | |
4034 | && swash_fetch(PL_utf8_X_T, | |
4035 | (U8*)locinput, utf8_target)) | |
4036 | { | |
cd94d768 | 4037 | locinput += UTF8SKIP(locinput); |
11dfcd49 KW |
4038 | } |
4039 | } else { | |
4040 | ||
4041 | /* Here, neither RI+ nor T+; must be some other | |
4042 | * Hangul. That means it is one of the others: L, | |
4043 | * LV, LVT or V, and matches: | |
4044 | * L* (L | LVT T* | V * V* T* | LV V* T*) */ | |
4045 | ||
4046 | /* Match L* */ | |
4047 | while (locinput < PL_regeol | |
4048 | && swash_fetch(PL_utf8_X_L, | |
4049 | (U8*)locinput, utf8_target)) | |
4050 | { | |
4051 | locinput += UTF8SKIP(locinput); | |
4052 | } | |
37e2e78e | 4053 | |
11dfcd49 KW |
4054 | /* Here, have exhausted L*. If the next character |
4055 | * is not an LV, LVT nor V, it means we had to have | |
4056 | * at least one L, so matches L+ in the original | |
4057 | * equation, we have a complete hangul syllable. | |
4058 | * Are done. */ | |
4059 | ||
4060 | if (locinput < PL_regeol | |
4061 | && swash_fetch(PL_utf8_X_LV_LVT_V, | |
4062 | (U8*)locinput, utf8_target)) | |
4063 | { | |
4064 | ||
4065 | /* Otherwise keep going. Must be LV, LVT or V. | |
4066 | * See if LVT */ | |
4067 | if (is_utf8_X_LVT((U8*)locinput)) { | |
4068 | locinput += UTF8SKIP(locinput); | |
4069 | } else { | |
4070 | ||
4071 | /* Must be V or LV. Take it, then match | |
4072 | * V* */ | |
4073 | locinput += UTF8SKIP(locinput); | |
4074 | while (locinput < PL_regeol | |
4075 | && swash_fetch(PL_utf8_X_V, | |
4076 | (U8*)locinput, | |
4077 | utf8_target)) | |
4078 | { | |
4079 | locinput += UTF8SKIP(locinput); | |
4080 | } | |
4081 | } | |
37e2e78e | 4082 | |
11dfcd49 KW |
4083 | /* And any of LV, LVT, or V can be followed |
4084 | * by T* */ | |
4085 | while (locinput < PL_regeol | |
4086 | && swash_fetch(PL_utf8_X_T, | |
4087 | (U8*)locinput, | |
4088 | utf8_target)) | |
4089 | { | |
4090 | locinput += UTF8SKIP(locinput); | |
4091 | } | |
4092 | } | |
cd94d768 | 4093 | } |
11dfcd49 | 4094 | } |
37e2e78e | 4095 | |
11dfcd49 KW |
4096 | /* Match any extender */ |
4097 | while (locinput < PL_regeol | |
4098 | && swash_fetch(PL_utf8_X_extend, | |
4099 | (U8*)locinput, utf8_target)) | |
4100 | { | |
4101 | locinput += UTF8SKIP(locinput); | |
4102 | } | |
37e2e78e | 4103 | } |
27d4fc33 | 4104 | exit_utf8: |
37e2e78e KW |
4105 | if (locinput > PL_regeol) sayNO; |
4106 | } | |
a0ed51b3 LW |
4107 | nextchr = UCHARAT(locinput); |
4108 | break; | |
81714fb9 YO |
4109 | |
4110 | case NREFFL: | |
d7ef4b73 KW |
4111 | { /* The capture buffer cases. The ones beginning with N for the |
4112 | named buffers just convert to the equivalent numbered and | |
4113 | pretend they were called as the corresponding numbered buffer | |
4114 | op. */ | |
26ecd678 TC |
4115 | /* don't initialize these in the declaration, it makes C++ |
4116 | unhappy */ | |
81714fb9 | 4117 | char *s; |
ff1157ca | 4118 | char type; |
8368298a TC |
4119 | re_fold_t folder; |
4120 | const U8 *fold_array; | |
26ecd678 | 4121 | UV utf8_fold_flags; |
8368298a | 4122 | |
81714fb9 | 4123 | PL_reg_flags |= RF_tainted; |
d7ef4b73 KW |
4124 | folder = foldEQ_locale; |
4125 | fold_array = PL_fold_locale; | |
4126 | type = REFFL; | |
17580e7a | 4127 | utf8_fold_flags = FOLDEQ_UTF8_LOCALE; |
d7ef4b73 KW |
4128 | goto do_nref; |
4129 | ||
2f7f8cb1 KW |
4130 | case NREFFA: |
4131 | folder = foldEQ_latin1; | |
4132 | fold_array = PL_fold_latin1; | |
4133 | type = REFFA; | |
4134 | utf8_fold_flags = FOLDEQ_UTF8_NOMIX_ASCII; | |
4135 | goto do_nref; | |
4136 | ||
d7ef4b73 KW |
4137 | case NREFFU: |
4138 | folder = foldEQ_latin1; | |
4139 | fold_array = PL_fold_latin1; | |
4140 | type = REFFU; | |
d513472c | 4141 | utf8_fold_flags = 0; |
d7ef4b73 KW |
4142 | goto do_nref; |
4143 | ||
81714fb9 | 4144 | case NREFF: |
d7ef4b73 KW |
4145 | folder = foldEQ; |
4146 | fold_array = PL_fold; | |
4147 | type = REFF; | |
d513472c | 4148 | utf8_fold_flags = 0; |
d7ef4b73 KW |
4149 | goto do_nref; |
4150 | ||
4151 | case NREF: | |
4152 | type = REF; | |
83d7b90b KW |
4153 | folder = NULL; |
4154 | fold_array = NULL; | |
d513472c | 4155 | utf8_fold_flags = 0; |
d7ef4b73 KW |
4156 | do_nref: |
4157 | ||
4158 | /* For the named back references, find the corresponding buffer | |
4159 | * number */ | |
0a4db386 YO |
4160 | n = reg_check_named_buff_matched(rex,scan); |
4161 | ||
d7ef4b73 | 4162 | if ( ! n ) { |
81714fb9 | 4163 | sayNO; |
d7ef4b73 KW |
4164 | } |
4165 | goto do_nref_ref_common; | |
4166 | ||
c8756f30 | 4167 | case REFFL: |
3280af22 | 4168 | PL_reg_flags |= RF_tainted; |
d7ef4b73 KW |
4169 | folder = foldEQ_locale; |
4170 | fold_array = PL_fold_locale; | |
17580e7a | 4171 | utf8_fold_flags = FOLDEQ_UTF8_LOCALE; |
d7ef4b73 KW |
4172 | goto do_ref; |
4173 | ||
2f7f8cb1 KW |
4174 | case REFFA: |
4175 | folder = foldEQ_latin1; | |
4176 | fold_array = PL_fold_latin1; | |
4177 | utf8_fold_flags = FOLDEQ_UTF8_NOMIX_ASCII; | |
4178 | goto do_ref; | |
4179 | ||
d7ef4b73 KW |
4180 | case REFFU: |
4181 | folder = foldEQ_latin1; | |
4182 | fold_array = PL_fold_latin1; | |
d513472c | 4183 | utf8_fold_flags = 0; |
d7ef4b73 KW |
4184 | goto do_ref; |
4185 | ||
4186 | case REFF: | |
4187 | folder = foldEQ; | |
4188 | fold_array = PL_fold; | |
d513472c | 4189 | utf8_fold_flags = 0; |
83d7b90b | 4190 | goto do_ref; |
d7ef4b73 | 4191 | |
c277df42 | 4192 | case REF: |
83d7b90b KW |
4193 | folder = NULL; |
4194 | fold_array = NULL; | |
d513472c | 4195 | utf8_fold_flags = 0; |
83d7b90b | 4196 | |
d7ef4b73 | 4197 | do_ref: |
81714fb9 | 4198 | type = OP(scan); |
d7ef4b73 KW |
4199 | n = ARG(scan); /* which paren pair */ |
4200 | ||
4201 | do_nref_ref_common: | |
b93070ed | 4202 | ln = rex->offs[n].start; |
2c2d71f5 | 4203 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
b93070ed | 4204 | if (rex->lastparen < n || ln == -1) |
af3f8c16 | 4205 | sayNO; /* Do not match unless seen CLOSEn. */ |
b93070ed | 4206 | if (ln == rex->offs[n].end) |
a0d0e21e | 4207 | break; |
a0ed51b3 | 4208 | |
24d3c4a9 | 4209 | s = PL_bostr + ln; |
d7ef4b73 | 4210 | if (type != REF /* REF can do byte comparison */ |
2f65c56d | 4211 | && (utf8_target || type == REFFU)) |
d7ef4b73 KW |
4212 | { /* XXX handle REFFL better */ |
4213 | char * limit = PL_regeol; | |
4214 | ||
4215 | /* This call case insensitively compares the entire buffer | |
4216 | * at s, with the current input starting at locinput, but | |
4217 | * not going off the end given by PL_regeol, and returns in | |
4218 | * limit upon success, how much of the current input was | |
4219 | * matched */ | |
b93070ed | 4220 | if (! foldEQ_utf8_flags(s, NULL, rex->offs[n].end - ln, utf8_target, |
d513472c | 4221 | locinput, &limit, 0, utf8_target, utf8_fold_flags)) |
d7ef4b73 KW |
4222 | { |
4223 | sayNO; | |
a0ed51b3 | 4224 | } |
d7ef4b73 | 4225 | locinput = limit; |
a0ed51b3 LW |
4226 | nextchr = UCHARAT(locinput); |
4227 | break; | |
4228 | } | |
4229 | ||
d7ef4b73 | 4230 | /* Not utf8: Inline the first character, for speed. */ |
76e3520e | 4231 | if (UCHARAT(s) != nextchr && |
81714fb9 | 4232 | (type == REF || |
d7ef4b73 | 4233 | UCHARAT(s) != fold_array[nextchr])) |
4633a7c4 | 4234 | sayNO; |
b93070ed | 4235 | ln = rex->offs[n].end - ln; |
24d3c4a9 | 4236 | if (locinput + ln > PL_regeol) |
4633a7c4 | 4237 | sayNO; |
81714fb9 | 4238 | if (ln > 1 && (type == REF |
24d3c4a9 | 4239 | ? memNE(s, locinput, ln) |
d7ef4b73 | 4240 | : ! folder(s, locinput, ln))) |
4633a7c4 | 4241 | sayNO; |
24d3c4a9 | 4242 | locinput += ln; |
76e3520e | 4243 | nextchr = UCHARAT(locinput); |
a0d0e21e | 4244 | break; |
81714fb9 | 4245 | } |
a0d0e21e | 4246 | case NOTHING: |
c277df42 | 4247 | case TAIL: |
a0d0e21e LW |
4248 | break; |
4249 | case BACK: | |
4250 | break; | |
40a82448 DM |
4251 | |
4252 | #undef ST | |
4253 | #define ST st->u.eval | |
c277df42 | 4254 | { |
c277df42 | 4255 | SV *ret; |
d2f13c59 | 4256 | REGEXP *re_sv; |
6bda09f9 | 4257 | regexp *re; |
f8fc2ecf | 4258 | regexp_internal *rei; |
1a147d38 YO |
4259 | regnode *startpoint; |
4260 | ||
4261 | case GOSTART: | |
e7707071 YO |
4262 | case GOSUB: /* /(...(?1))/ /(...(?&foo))/ */ |
4263 | if (cur_eval && cur_eval->locinput==locinput) { | |
24b23f37 | 4264 | if (cur_eval->u.eval.close_paren == (U32)ARG(scan)) |
1a147d38 | 4265 | Perl_croak(aTHX_ "Infinite recursion in regex"); |
4b196cd4 | 4266 | if ( ++nochange_depth > max_nochange_depth ) |
1a147d38 YO |
4267 | Perl_croak(aTHX_ |
4268 | "Pattern subroutine nesting without pos change" | |
4269 | " exceeded limit in regex"); | |
6bda09f9 YO |
4270 | } else { |
4271 | nochange_depth = 0; | |
1a147d38 | 4272 | } |
288b8c02 | 4273 | re_sv = rex_sv; |
6bda09f9 | 4274 | re = rex; |
f8fc2ecf | 4275 | rei = rexi; |
1a147d38 | 4276 | if (OP(scan)==GOSUB) { |
6bda09f9 YO |
4277 | startpoint = scan + ARG2L(scan); |
4278 | ST.close_paren = ARG(scan); | |
4279 | } else { | |
f8fc2ecf | 4280 | startpoint = rei->program+1; |
6bda09f9 YO |
4281 | ST.close_paren = 0; |
4282 | } | |
4283 | goto eval_recurse_doit; | |
118e2215 | 4284 | assert(0); /* NOTREACHED */ |
6bda09f9 YO |
4285 | case EVAL: /* /(?{A})B/ /(??{A})B/ and /(?(?{A})X|Y)B/ */ |
4286 | if (cur_eval && cur_eval->locinput==locinput) { | |
4b196cd4 | 4287 | if ( ++nochange_depth > max_nochange_depth ) |
1a147d38 | 4288 | Perl_croak(aTHX_ "EVAL without pos change exceeded limit in regex"); |
6bda09f9 YO |
4289 | } else { |
4290 | nochange_depth = 0; | |
4291 | } | |
8e5e9ebe | 4292 | { |
4aabdb9b | 4293 | /* execute the code in the {...} */ |
81ed78b2 | 4294 | |
4aabdb9b | 4295 | dSP; |
81ed78b2 | 4296 | SV ** before; |
1f4d1a1e | 4297 | OP * const oop = PL_op; |
4aabdb9b | 4298 | COP * const ocurcop = PL_curcop; |
81ed78b2 | 4299 | OP *nop; |
d80618d2 | 4300 | char *saved_regeol = PL_regeol; |
91332126 | 4301 | struct re_save_state saved_state; |
81ed78b2 | 4302 | CV *newcv; |
91332126 | 4303 | |
74088413 DM |
4304 | /* save *all* paren positions */ |
4305 | regcppush(rex, 0); | |
4306 | REGCP_SET(runops_cp); | |
4307 | ||
6562f1c4 | 4308 | /* To not corrupt the existing regex state while executing the |
b7f4cd04 FR |
4309 | * eval we would normally put it on the save stack, like with |
4310 | * save_re_context. However, re-evals have a weird scoping so we | |
4311 | * can't just add ENTER/LEAVE here. With that, things like | |
4312 | * | |
4313 | * (?{$a=2})(a(?{local$a=$a+1}))*aak*c(?{$b=$a}) | |
4314 | * | |
4315 | * would break, as they expect the localisation to be unwound | |
4316 | * only when the re-engine backtracks through the bit that | |
4317 | * localised it. | |
4318 | * | |
4319 | * What we do instead is just saving the state in a local c | |
4320 | * variable. | |
4321 | */ | |
91332126 | 4322 | Copy(&PL_reg_state, &saved_state, 1, struct re_save_state); |
81ed78b2 | 4323 | |
d24ca0c5 | 4324 | PL_reg_state.re_reparsing = FALSE; |
91332126 | 4325 | |
81ed78b2 DM |
4326 | if (!caller_cv) |
4327 | caller_cv = find_runcv(NULL); | |
4328 | ||
4aabdb9b | 4329 | n = ARG(scan); |
81ed78b2 | 4330 | |
b30fcab9 | 4331 | if (rexi->data->what[n] == 'r') { /* code from an external qr */ |
81ed78b2 | 4332 | newcv = ((struct regexp *)SvANY( |
b30fcab9 DM |
4333 | (REGEXP*)(rexi->data->data[n]) |
4334 | ))->qr_anoncv | |
81ed78b2 DM |
4335 | ; |
4336 | nop = (OP*)rexi->data->data[n+1]; | |
b30fcab9 DM |
4337 | } |
4338 | else if (rexi->data->what[n] == 'l') { /* literal code */ | |
81ed78b2 DM |
4339 | newcv = caller_cv; |
4340 | nop = (OP*)rexi->data->data[n]; | |
4341 | assert(CvDEPTH(newcv)); | |
68e2671b DM |
4342 | } |
4343 | else { | |
d24ca0c5 DM |
4344 | /* literal with own CV */ |
4345 | assert(rexi->data->what[n] == 'L'); | |
81ed78b2 DM |
4346 | newcv = rex->qr_anoncv; |
4347 | nop = (OP*)rexi->data->data[n]; | |
68e2671b | 4348 | } |
81ed78b2 | 4349 | |
0e458318 DM |
4350 | /* normally if we're about to execute code from the same |
4351 | * CV that we used previously, we just use the existing | |
4352 | * CX stack entry. However, its possible that in the | |
4353 | * meantime we may have backtracked, popped from the save | |
4354 | * stack, and undone the SAVECOMPPAD(s) associated with | |
4355 | * PUSH_MULTICALL; in which case PL_comppad no longer | |
4356 | * points to newcv's pad. */ | |
4357 | if (newcv != last_pushed_cv || PL_comppad != last_pad) | |
4358 | { | |
4359 | I32 depth = (newcv == caller_cv) ? 0 : 1; | |
4360 | if (last_pushed_cv) { | |
4361 | CHANGE_MULTICALL_WITHDEPTH(newcv, depth); | |
4362 | } | |
4363 | else { | |
4364 | PUSH_MULTICALL_WITHDEPTH(newcv, depth); | |
4365 | } | |
4366 | last_pushed_cv = newcv; | |
4367 | } | |
4368 | last_pad = PL_comppad; | |
4369 | ||
2e2e3f36 DM |
4370 | /* the initial nextstate you would normally execute |
4371 | * at the start of an eval (which would cause error | |
4372 | * messages to come from the eval), may be optimised | |
4373 | * away from the execution path in the regex code blocks; | |
4374 | * so manually set PL_curcop to it initially */ | |
4375 | { | |
81ed78b2 | 4376 | OP *o = cUNOPx(nop)->op_first; |
2e2e3f36 DM |
4377 | assert(o->op_type == OP_NULL); |
4378 | if (o->op_targ == OP_SCOPE) { | |
4379 | o = cUNOPo->op_first; | |
4380 | } | |
4381 | else { | |
4382 | assert(o->op_targ == OP_LEAVE); | |
4383 | o = cUNOPo->op_first; | |
4384 | assert(o->op_type == OP_ENTER); | |
4385 | o = o->op_sibling; | |
4386 | } | |
4387 | ||
4388 | if (o->op_type != OP_STUB) { | |
4389 | assert( o->op_type == OP_NEXTSTATE | |
4390 | || o->op_type == OP_DBSTATE | |
4391 | || (o->op_type == OP_NULL | |
4392 | && ( o->op_targ == OP_NEXTSTATE | |
4393 | || o->op_targ == OP_DBSTATE | |
4394 | ) | |
4395 | ) | |
4396 | ); | |
4397 | PL_curcop = (COP*)o; | |
4398 | } | |
4399 | } | |
81ed78b2 | 4400 | nop = nop->op_next; |
2e2e3f36 | 4401 | |
24b23f37 | 4402 | DEBUG_STATE_r( PerlIO_printf(Perl_debug_log, |
81ed78b2 DM |
4403 | " re EVAL PL_op=0x%"UVxf"\n", PTR2UV(nop)) ); |
4404 | ||
b93070ed | 4405 | rex->offs[0].end = PL_reg_magic->mg_len = locinput - PL_bostr; |
4aabdb9b | 4406 | |
2bf803e2 YO |
4407 | if (sv_yes_mark) { |
4408 | SV *sv_mrk = get_sv("REGMARK", 1); | |
4409 | sv_setsv(sv_mrk, sv_yes_mark); | |
4410 | } | |
4411 | ||
81ed78b2 DM |
4412 | /* we don't use MULTICALL here as we want to call the |
4413 | * first op of the block of interest, rather than the | |
4414 | * first op of the sub */ | |
4415 | before = SP; | |
4416 | PL_op = nop; | |
8e5e9ebe RGS |
4417 | CALLRUNOPS(aTHX); /* Scalar context. */ |
4418 | SPAGAIN; | |
4419 | if (SP == before) | |
075aa684 | 4420 | ret = &PL_sv_undef; /* protect against empty (?{}) blocks. */ |
8e5e9ebe RGS |
4421 | else { |
4422 | ret = POPs; | |
4423 | PUTBACK; | |
4424 | } | |
4aabdb9b | 4425 | |
e4bfbed3 DM |
4426 | /* before restoring everything, evaluate the returned |
4427 | * value, so that 'uninit' warnings don't use the wrong | |
497d0a96 DM |
4428 | * PL_op or pad. Also need to process any magic vars |
4429 | * (e.g. $1) *before* parentheses are restored */ | |
e4bfbed3 DM |
4430 | |
4431 | PL_op = NULL; | |
4432 | ||
5e98dac2 | 4433 | re_sv = NULL; |
e4bfbed3 DM |
4434 | if (logical == 0) /* (?{})/ */ |
4435 | sv_setsv(save_scalar(PL_replgv), ret); /* $^R */ | |
4436 | else if (logical == 1) { /* /(?(?{...})X|Y)/ */ | |
4437 | sw = cBOOL(SvTRUE(ret)); | |
4438 | logical = 0; | |
4439 | } | |
4440 | else { /* /(??{}) */ | |
497d0a96 DM |
4441 | /* if its overloaded, let the regex compiler handle |
4442 | * it; otherwise extract regex, or stringify */ | |
4443 | if (!SvAMAGIC(ret)) { | |
4444 | SV *sv = ret; | |
4445 | if (SvROK(sv)) | |
4446 | sv = SvRV(sv); | |
4447 | if (SvTYPE(sv) == SVt_REGEXP) | |
4448 | re_sv = (REGEXP*) sv; | |
4449 | else if (SvSMAGICAL(sv)) { | |
4450 | MAGIC *mg = mg_find(sv, PERL_MAGIC_qr); | |
4451 | if (mg) | |
4452 | re_sv = (REGEXP *) mg->mg_obj; | |
4453 | } | |
e4bfbed3 | 4454 | |
497d0a96 DM |
4455 | /* force any magic, undef warnings here */ |
4456 | if (!re_sv) { | |
4457 | ret = sv_mortalcopy(ret); | |
4458 | (void) SvPV_force_nolen(ret); | |
4459 | } | |
e4bfbed3 DM |
4460 | } |
4461 | ||
4462 | } | |
4463 | ||
91332126 FR |
4464 | Copy(&saved_state, &PL_reg_state, 1, struct re_save_state); |
4465 | ||
81ed78b2 DM |
4466 | /* *** Note that at this point we don't restore |
4467 | * PL_comppad, (or pop the CxSUB) on the assumption it may | |
4468 | * be used again soon. This is safe as long as nothing | |
4469 | * in the regexp code uses the pad ! */ | |
4aabdb9b | 4470 | PL_op = oop; |
4aabdb9b | 4471 | PL_curcop = ocurcop; |
d80618d2 | 4472 | PL_regeol = saved_regeol; |
e4bfbed3 DM |
4473 | S_regcp_restore(aTHX_ rex, runops_cp); |
4474 | ||
4475 | if (logical != 2) | |
4aabdb9b | 4476 | break; |
8e5e9ebe | 4477 | } |
e4bfbed3 DM |
4478 | |
4479 | /* only /(??{})/ from now on */ | |
24d3c4a9 | 4480 | logical = 0; |
4aabdb9b | 4481 | { |
4f639d21 DM |
4482 | /* extract RE object from returned value; compiling if |
4483 | * necessary */ | |
5c35adbb | 4484 | |
575c37f6 DM |
4485 | if (re_sv) { |
4486 | re_sv = reg_temp_copy(NULL, re_sv); | |
288b8c02 | 4487 | } |
0f5d15d6 | 4488 | else { |
c737faaf | 4489 | U32 pm_flags = 0; |
a3b680e6 | 4490 | const I32 osize = PL_regsize; |
0f5d15d6 | 4491 | |
9753d940 DM |
4492 | if (SvUTF8(ret) && IN_BYTES) { |
4493 | /* In use 'bytes': make a copy of the octet | |
4494 | * sequence, but without the flag on */ | |
b9ad30b4 NC |
4495 | STRLEN len; |
4496 | const char *const p = SvPV(ret, len); | |
4497 | ret = newSVpvn_flags(p, len, SVs_TEMP); | |
4498 | } | |
732caac7 DM |
4499 | if (rex->intflags & PREGf_USE_RE_EVAL) |
4500 | pm_flags |= PMf_USE_RE_EVAL; | |
4501 | ||
4502 | /* if we got here, it should be an engine which | |
4503 | * supports compiling code blocks and stuff */ | |
4504 | assert(rex->engine && rex->engine->op_comp); | |
ec841a27 | 4505 | assert(!(scan->flags & ~RXf_PMf_COMPILETIME)); |
575c37f6 | 4506 | re_sv = rex->engine->op_comp(aTHX_ &ret, 1, NULL, |
ec841a27 DM |
4507 | rex->engine, NULL, NULL, |
4508 | /* copy /msix etc to inner pattern */ | |
4509 | scan->flags, | |
4510 | pm_flags); | |
732caac7 | 4511 | |
9041c2e3 | 4512 | if (!(SvFLAGS(ret) |
faf82a0b | 4513 | & (SVs_TEMP | SVs_PADTMP | SVf_READONLY |
3ce3ed55 | 4514 | | SVs_GMG))) { |
a2794585 NC |
4515 | /* This isn't a first class regexp. Instead, it's |
4516 | caching a regexp onto an existing, Perl visible | |
4517 | scalar. */ | |
575c37f6 | 4518 | sv_magic(ret, MUTABLE_SV(re_sv), PERL_MAGIC_qr, 0, 0); |
3ce3ed55 | 4519 | } |
0f5d15d6 | 4520 | PL_regsize = osize; |
74088413 DM |
4521 | /* safe to do now that any $1 etc has been |
4522 | * interpolated into the new pattern string and | |
4523 | * compiled */ | |
4524 | S_regcp_restore(aTHX_ rex, runops_cp); | |
0f5d15d6 | 4525 | } |
575c37f6 | 4526 | re = (struct regexp *)SvANY(re_sv); |
4aabdb9b | 4527 | } |
07bc277f | 4528 | RXp_MATCH_COPIED_off(re); |
28d8d7f4 YO |
4529 | re->subbeg = rex->subbeg; |
4530 | re->sublen = rex->sublen; | |
f8fc2ecf | 4531 | rei = RXi_GET(re); |
6bda09f9 | 4532 | DEBUG_EXECUTE_r( |
f2ed9b32 | 4533 | debug_start_match(re_sv, utf8_target, locinput, PL_regeol, |
6bda09f9 YO |
4534 | "Matching embedded"); |
4535 | ); | |
f8fc2ecf | 4536 | startpoint = rei->program + 1; |
1a147d38 | 4537 | ST.close_paren = 0; /* only used for GOSUB */ |
aa283a38 | 4538 | |
1a147d38 | 4539 | eval_recurse_doit: /* Share code with GOSUB below this line */ |
aa283a38 | 4540 | /* run the pattern returned from (??{...}) */ |
b93070ed | 4541 | ST.cp = regcppush(rex, 0); /* Save *all* the positions. */ |
40a82448 | 4542 | REGCP_SET(ST.lastcp); |
6bda09f9 | 4543 | |
0357f1fd ML |
4544 | re->lastparen = 0; |
4545 | re->lastcloseparen = 0; | |
4546 | ||
4aabdb9b | 4547 | PL_reginput = locinput; |
ae0beba1 | 4548 | PL_regsize = 0; |
4aabdb9b DM |
4549 | |
4550 | /* XXXX This is too dramatic a measure... */ | |
4551 | PL_reg_maxiter = 0; | |
4552 | ||
faec1544 | 4553 | ST.toggle_reg_flags = PL_reg_flags; |
3c8556c3 | 4554 | if (RX_UTF8(re_sv)) |
faec1544 DM |
4555 | PL_reg_flags |= RF_utf8; |
4556 | else | |
4557 | PL_reg_flags &= ~RF_utf8; | |
4558 | ST.toggle_reg_flags ^= PL_reg_flags; /* diff of old and new */ | |
4559 | ||
288b8c02 | 4560 | ST.prev_rex = rex_sv; |
faec1544 | 4561 | ST.prev_curlyx = cur_curlyx; |
ec43f78b DM |
4562 | rex_sv = re_sv; |
4563 | SET_reg_curpm(rex_sv); | |
288b8c02 | 4564 | rex = re; |
f8fc2ecf | 4565 | rexi = rei; |
faec1544 | 4566 | cur_curlyx = NULL; |
40a82448 | 4567 | ST.B = next; |
faec1544 DM |
4568 | ST.prev_eval = cur_eval; |
4569 | cur_eval = st; | |
faec1544 | 4570 | /* now continue from first node in postoned RE */ |
6bda09f9 | 4571 | PUSH_YES_STATE_GOTO(EVAL_AB, startpoint); |
118e2215 | 4572 | assert(0); /* NOTREACHED */ |
c277df42 | 4573 | } |
40a82448 | 4574 | |
faec1544 DM |
4575 | case EVAL_AB: /* cleanup after a successful (??{A})B */ |
4576 | /* note: this is called twice; first after popping B, then A */ | |
4577 | PL_reg_flags ^= ST.toggle_reg_flags; | |
ec43f78b DM |
4578 | rex_sv = ST.prev_rex; |
4579 | SET_reg_curpm(rex_sv); | |
288b8c02 | 4580 | rex = (struct regexp *)SvANY(rex_sv); |
f8fc2ecf | 4581 | rexi = RXi_GET(rex); |
faec1544 DM |
4582 | regcpblow(ST.cp); |
4583 | cur_eval = ST.prev_eval; | |
4584 | cur_curlyx = ST.prev_curlyx; | |
34a81e2b | 4585 | |
40a82448 DM |
4586 | /* XXXX This is too dramatic a measure... */ |
4587 | PL_reg_maxiter = 0; | |
e7707071 | 4588 | if ( nochange_depth ) |
4b196cd4 | 4589 | nochange_depth--; |
262b90c4 | 4590 | sayYES; |
40a82448 | 4591 | |
40a82448 | 4592 | |
faec1544 DM |
4593 | case EVAL_AB_fail: /* unsuccessfully ran A or B in (??{A})B */ |
4594 | /* note: this is called twice; first after popping B, then A */ | |
4595 | PL_reg_flags ^= ST.toggle_reg_flags; | |
ec43f78b DM |
4596 | rex_sv = ST.prev_rex; |
4597 | SET_reg_curpm(rex_sv); | |
288b8c02 | 4598 | rex = (struct regexp *)SvANY(rex_sv); |
f8fc2ecf | 4599 | rexi = RXi_GET(rex); |
0357f1fd | 4600 | |
40a82448 DM |
4601 | PL_reginput = locinput; |
4602 | REGCP_UNWIND(ST.lastcp); | |
4603 | regcppop(rex); | |
faec1544 DM |
4604 | cur_eval = ST.prev_eval; |
4605 | cur_curlyx = ST.prev_curlyx; | |
4606 | /* XXXX This is too dramatic a measure... */ | |
4607 | PL_reg_maxiter = 0; | |
e7707071 | 4608 | if ( nochange_depth ) |
4b196cd4 | 4609 | nochange_depth--; |
40a82448 | 4610 | sayNO_SILENT; |
40a82448 DM |
4611 | #undef ST |
4612 | ||
a0d0e21e | 4613 | case OPEN: |
c277df42 | 4614 | n = ARG(scan); /* which paren pair */ |
1ca2007e | 4615 | rex->offs[n].start_tmp = locinput - PL_bostr; |
3280af22 NIS |
4616 | if (n > PL_regsize) |
4617 | PL_regsize = n; | |
495f47a5 DM |
4618 | DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log, |
4619 | "rex=0x%"UVxf" offs=0x%"UVxf": \\%"UVuf": set %"IVdf" tmp; regsize=%"UVuf"\n", | |
4620 | PTR2UV(rex), | |
4621 | PTR2UV(rex->offs), | |
4622 | (UV)n, | |
4623 | (IV)rex->offs[n].start_tmp, | |
4624 | (UV)PL_regsize | |
4625 | )); | |
e2e6a0f1 | 4626 | lastopen = n; |
a0d0e21e | 4627 | break; |
495f47a5 DM |
4628 | |
4629 | /* XXX really need to log other places start/end are set too */ | |
4630 | #define CLOSE_CAPTURE \ | |
4631 | rex->offs[n].start = rex->offs[n].start_tmp; \ | |
4632 | rex->offs[n].end = locinput - PL_bostr; \ | |
4633 | DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log, \ | |
4634 | "rex=0x%"UVxf" offs=0x%"UVxf": \\%"UVuf": set %"IVdf"..%"IVdf"\n", \ | |
4635 | PTR2UV(rex), \ | |
4636 | PTR2UV(rex->offs), \ | |
4637 | (UV)n, \ | |
4638 | (IV)rex->offs[n].start, \ | |
4639 | (IV)rex->offs[n].end \ | |
4640 | )) | |
4641 | ||
a0d0e21e | 4642 | case CLOSE: |
c277df42 | 4643 | n = ARG(scan); /* which paren pair */ |
495f47a5 | 4644 | CLOSE_CAPTURE; |
7f69552c YO |
4645 | /*if (n > PL_regsize) |
4646 | PL_regsize = n;*/ | |
b93070ed DM |
4647 | if (n > rex->lastparen) |
4648 | rex->lastparen = n; | |
4649 | rex->lastcloseparen = n; | |
3b6647e0 | 4650 | if (cur_eval && cur_eval->u.eval.close_paren == n) { |
6bda09f9 YO |
4651 | goto fake_end; |
4652 | } | |
a0d0e21e | 4653 | break; |
e2e6a0f1 YO |
4654 | case ACCEPT: |
4655 | if (ARG(scan)){ | |
4656 | regnode *cursor; | |
4657 | for (cursor=scan; | |
4658 | cursor && OP(cursor)!=END; | |
4659 | cursor=regnext(cursor)) | |
4660 | { | |
4661 | if ( OP(cursor)==CLOSE ){ | |
4662 | n = ARG(cursor); | |
4663 | if ( n <= lastopen ) { | |
495f47a5 | 4664 | CLOSE_CAPTURE; |
e2e6a0f1 YO |
4665 | /*if (n > PL_regsize) |
4666 | PL_regsize = n;*/ | |
b93070ed DM |
4667 | if (n > rex->lastparen) |
4668 | rex->lastparen = n; | |
4669 | rex->lastcloseparen = n; | |
3b6647e0 RB |
4670 | if ( n == ARG(scan) || (cur_eval && |
4671 | cur_eval->u.eval.close_paren == n)) | |
e2e6a0f1 YO |
4672 | break; |
4673 | } | |
4674 | } | |
4675 | } | |
4676 | } | |
4677 | goto fake_end; | |
4678 | /*NOTREACHED*/ | |
c277df42 IZ |
4679 | case GROUPP: |
4680 | n = ARG(scan); /* which paren pair */ | |
b93070ed | 4681 | sw = cBOOL(rex->lastparen >= n && rex->offs[n].end != -1); |
c277df42 | 4682 | break; |
0a4db386 YO |
4683 | case NGROUPP: |
4684 | /* reg_check_named_buff_matched returns 0 for no match */ | |
f2338a2e | 4685 | sw = cBOOL(0 < reg_check_named_buff_matched(rex,scan)); |
0a4db386 | 4686 | break; |
1a147d38 | 4687 | case INSUBP: |
0a4db386 | 4688 | n = ARG(scan); |
3b6647e0 | 4689 | sw = (cur_eval && (!n || cur_eval->u.eval.close_paren == n)); |
0a4db386 YO |
4690 | break; |
4691 | case DEFINEP: | |
4692 | sw = 0; | |
4693 | break; | |
c277df42 | 4694 | case IFTHEN: |
2c2d71f5 | 4695 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
24d3c4a9 | 4696 | if (sw) |
c277df42 IZ |
4697 | next = NEXTOPER(NEXTOPER(scan)); |
4698 | else { | |
4699 | next = scan + ARG(scan); | |
4700 | if (OP(next) == IFTHEN) /* Fake one. */ | |
4701 | next = NEXTOPER(NEXTOPER(next)); | |
4702 | } | |
4703 | break; | |
4704 | case LOGICAL: | |
24d3c4a9 | 4705 | logical = scan->flags; |
c277df42 | 4706 | break; |
c476f425 | 4707 | |
2ab05381 | 4708 | /******************************************************************* |
2ab05381 | 4709 | |
c476f425 DM |
4710 | The CURLYX/WHILEM pair of ops handle the most generic case of the /A*B/ |
4711 | pattern, where A and B are subpatterns. (For simple A, CURLYM or | |
4712 | STAR/PLUS/CURLY/CURLYN are used instead.) | |
2ab05381 | 4713 | |
c476f425 | 4714 | A*B is compiled as <CURLYX><A><WHILEM><B> |
2ab05381 | 4715 | |
c476f425 DM |
4716 | On entry to the subpattern, CURLYX is called. This pushes a CURLYX |
4717 | state, which contains the current count, initialised to -1. It also sets | |
4718 | cur_curlyx to point to this state, with any previous value saved in the | |
4719 | state block. | |
2ab05381 | 4720 | |
c476f425 DM |
4721 | CURLYX then jumps straight to the WHILEM op, rather than executing A, |
4722 | since the pattern may possibly match zero times (i.e. it's a while {} loop | |
4723 | rather than a do {} while loop). | |
2ab05381 | 4724 | |
c476f425 DM |
4725 | Each entry to WHILEM represents a successful match of A. The count in the |
4726 | CURLYX block is incremented, another WHILEM state is pushed, and execution | |
4727 | passes to A or B depending on greediness and the current count. | |
2ab05381 | 4728 | |
c476f425 DM |
4729 | For example, if matching against the string a1a2a3b (where the aN are |
4730 | substrings that match /A/), then the match progresses as follows: (the | |
4731 | pushed states are interspersed with the bits of strings matched so far): | |
2ab05381 | 4732 | |
c476f425 DM |
4733 | <CURLYX cnt=-1> |
4734 | <CURLYX cnt=0><WHILEM> | |
4735 | <CURLYX cnt=1><WHILEM> a1 <WHILEM> | |
4736 | <CURLYX cnt=2><WHILEM> a1 <WHILEM> a2 <WHILEM> | |
4737 | <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> | |
4738 | <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> b | |
2ab05381 | 4739 | |
c476f425 DM |
4740 | (Contrast this with something like CURLYM, which maintains only a single |
4741 | backtrack state: | |
2ab05381 | 4742 | |
c476f425 DM |
4743 | <CURLYM cnt=0> a1 |
4744 | a1 <CURLYM cnt=1> a2 | |
4745 | a1 a2 <CURLYM cnt=2> a3 | |
4746 | a1 a2 a3 <CURLYM cnt=3> b | |
4747 | ) | |
2ab05381 | 4748 | |
c476f425 DM |
4749 | Each WHILEM state block marks a point to backtrack to upon partial failure |
4750 | of A or B, and also contains some minor state data related to that | |
4751 | iteration. The CURLYX block, pointed to by cur_curlyx, contains the | |
4752 | overall state, such as the count, and pointers to the A and B ops. | |
2ab05381 | 4753 | |
c476f425 DM |
4754 | This is complicated slightly by nested CURLYX/WHILEM's. Since cur_curlyx |
4755 | must always point to the *current* CURLYX block, the rules are: | |
2ab05381 | 4756 | |
c476f425 DM |
4757 | When executing CURLYX, save the old cur_curlyx in the CURLYX state block, |
4758 | and set cur_curlyx to point the new block. | |
2ab05381 | 4759 | |
c476f425 DM |
4760 | When popping the CURLYX block after a successful or unsuccessful match, |
4761 | restore the previous cur_curlyx. | |
2ab05381 | 4762 | |
c476f425 DM |
4763 | When WHILEM is about to execute B, save the current cur_curlyx, and set it |
4764 | to the outer one saved in the CURLYX block. | |
2ab05381 | 4765 | |
c476f425 DM |
4766 | When popping the WHILEM block after a successful or unsuccessful B match, |
4767 | restore the previous cur_curlyx. | |
2ab05381 | 4768 | |
c476f425 DM |
4769 | Here's an example for the pattern (AI* BI)*BO |
4770 | I and O refer to inner and outer, C and W refer to CURLYX and WHILEM: | |
2ab05381 | 4771 | |
c476f425 DM |
4772 | cur_ |
4773 | curlyx backtrack stack | |
4774 | ------ --------------- | |
4775 | NULL | |
4776 | CO <CO prev=NULL> <WO> | |
4777 | CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai | |
4778 | CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi | |
4779 | NULL <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi <WO prev=CO> bo | |
2ab05381 | 4780 | |
c476f425 DM |
4781 | At this point the pattern succeeds, and we work back down the stack to |
4782 | clean up, restoring as we go: | |
95b24440 | 4783 | |
c476f425 DM |
4784 | CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi |
4785 | CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai | |
4786 | CO <CO prev=NULL> <WO> | |
4787 | NULL | |
a0374537 | 4788 | |
c476f425 DM |
4789 | *******************************************************************/ |
4790 | ||
4791 | #define ST st->u.curlyx | |
4792 | ||
4793 | case CURLYX: /* start of /A*B/ (for complex A) */ | |
4794 | { | |
4795 | /* No need to save/restore up to this paren */ | |
4796 | I32 parenfloor = scan->flags; | |
4797 | ||
4798 | assert(next); /* keep Coverity happy */ | |
4799 | if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */ | |
4800 | next += ARG(next); | |
4801 | ||
4802 | /* XXXX Probably it is better to teach regpush to support | |
4803 | parenfloor > PL_regsize... */ | |
b93070ed DM |
4804 | if (parenfloor > (I32)rex->lastparen) |
4805 | parenfloor = rex->lastparen; /* Pessimization... */ | |
c476f425 DM |
4806 | |
4807 | ST.prev_curlyx= cur_curlyx; | |
4808 | cur_curlyx = st; | |
4809 | ST.cp = PL_savestack_ix; | |
4810 | ||
4811 | /* these fields contain the state of the current curly. | |
4812 | * they are accessed by subsequent WHILEMs */ | |
4813 | ST.parenfloor = parenfloor; | |
d02d6d97 | 4814 | ST.me = scan; |
c476f425 | 4815 | ST.B = next; |
24d3c4a9 DM |
4816 | ST.minmod = minmod; |
4817 | minmod = 0; | |
c476f425 DM |
4818 | ST.count = -1; /* this will be updated by WHILEM */ |
4819 | ST.lastloc = NULL; /* this will be updated by WHILEM */ | |
4820 | ||
4821 | PL_reginput = locinput; | |
4822 | PUSH_YES_STATE_GOTO(CURLYX_end, PREVOPER(next)); | |
118e2215 | 4823 | assert(0); /* NOTREACHED */ |
c476f425 | 4824 | } |
a0d0e21e | 4825 | |
c476f425 | 4826 | case CURLYX_end: /* just finished matching all of A*B */ |
c476f425 DM |
4827 | cur_curlyx = ST.prev_curlyx; |
4828 | sayYES; | |
118e2215 | 4829 | assert(0); /* NOTREACHED */ |
a0d0e21e | 4830 | |
c476f425 DM |
4831 | case CURLYX_end_fail: /* just failed to match all of A*B */ |
4832 | regcpblow(ST.cp); | |
4833 | cur_curlyx = ST.prev_curlyx; | |
4834 | sayNO; | |
118e2215 | 4835 | assert(0); /* NOTREACHED */ |
4633a7c4 | 4836 | |
a0d0e21e | 4837 | |
c476f425 DM |
4838 | #undef ST |
4839 | #define ST st->u.whilem | |
4840 | ||
4841 | case WHILEM: /* just matched an A in /A*B/ (for complex A) */ | |
4842 | { | |
4843 | /* see the discussion above about CURLYX/WHILEM */ | |
c476f425 | 4844 | I32 n; |
d02d6d97 DM |
4845 | int min = ARG1(cur_curlyx->u.curlyx.me); |
4846 | int max = ARG2(cur_curlyx->u.curlyx.me); | |
4847 | regnode *A = NEXTOPER(cur_curlyx->u.curlyx.me) + EXTRA_STEP_2ARGS; | |
4848 | ||
c476f425 DM |
4849 | assert(cur_curlyx); /* keep Coverity happy */ |
4850 | n = ++cur_curlyx->u.curlyx.count; /* how many A's matched */ | |
4851 | ST.save_lastloc = cur_curlyx->u.curlyx.lastloc; | |
4852 | ST.cache_offset = 0; | |
4853 | ST.cache_mask = 0; | |
4854 | ||
4855 | PL_reginput = locinput; | |
4856 | ||
4857 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, | |
d02d6d97 DM |
4858 | "%*s whilem: matched %ld out of %d..%d\n", |
4859 | REPORT_CODE_OFF+depth*2, "", (long)n, min, max) | |
c476f425 | 4860 | ); |
a0d0e21e | 4861 | |
c476f425 | 4862 | /* First just match a string of min A's. */ |
a0d0e21e | 4863 | |
d02d6d97 | 4864 | if (n < min) { |
b93070ed | 4865 | ST.cp = regcppush(rex, cur_curlyx->u.curlyx.parenfloor); |
c476f425 | 4866 | cur_curlyx->u.curlyx.lastloc = locinput; |
92e82afa YO |
4867 | REGCP_SET(ST.lastcp); |
4868 | ||
d02d6d97 | 4869 | PUSH_STATE_GOTO(WHILEM_A_pre, A); |
118e2215 | 4870 | assert(0); /* NOTREACHED */ |
c476f425 DM |
4871 | } |
4872 | ||
4873 | /* If degenerate A matches "", assume A done. */ | |
4874 | ||
4875 | if (locinput == cur_curlyx->u.curlyx.lastloc) { | |
4876 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, | |
4877 | "%*s whilem: empty match detected, trying continuation...\n", | |
4878 | REPORT_CODE_OFF+depth*2, "") | |
4879 | ); | |
4880 | goto do_whilem_B_max; | |
4881 | } | |
4882 | ||
4883 | /* super-linear cache processing */ | |
4884 | ||
4885 | if (scan->flags) { | |
a0d0e21e | 4886 | |
2c2d71f5 | 4887 | if (!PL_reg_maxiter) { |
c476f425 DM |
4888 | /* start the countdown: Postpone detection until we |
4889 | * know the match is not *that* much linear. */ | |
2c2d71f5 | 4890 | PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4); |
66bf836d DM |
4891 | /* possible overflow for long strings and many CURLYX's */ |
4892 | if (PL_reg_maxiter < 0) | |
4893 | PL_reg_maxiter = I32_MAX; | |
2c2d71f5 JH |
4894 | PL_reg_leftiter = PL_reg_maxiter; |
4895 | } | |
c476f425 | 4896 | |
2c2d71f5 | 4897 | if (PL_reg_leftiter-- == 0) { |
c476f425 | 4898 | /* initialise cache */ |
3298f257 | 4899 | const I32 size = (PL_reg_maxiter + 7)/8; |
2c2d71f5 | 4900 | if (PL_reg_poscache) { |
eb160463 | 4901 | if ((I32)PL_reg_poscache_size < size) { |
2c2d71f5 JH |
4902 | Renew(PL_reg_poscache, size, char); |
4903 | PL_reg_poscache_size = size; | |
4904 | } | |
4905 | Zero(PL_reg_poscache, size, char); | |
4906 | } | |
4907 | else { | |
4908 | PL_reg_poscache_size = size; | |
a02a5408 | 4909 | Newxz(PL_reg_poscache, size, char); |
2c2d71f5 | 4910 | } |
c476f425 DM |
4911 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
4912 | "%swhilem: Detected a super-linear match, switching on caching%s...\n", | |
4913 | PL_colors[4], PL_colors[5]) | |
4914 | ); | |
2c2d71f5 | 4915 | } |
c476f425 | 4916 | |
2c2d71f5 | 4917 | if (PL_reg_leftiter < 0) { |
c476f425 DM |
4918 | /* have we already failed at this position? */ |
4919 | I32 offset, mask; | |
4920 | offset = (scan->flags & 0xf) - 1 | |
4921 | + (locinput - PL_bostr) * (scan->flags>>4); | |
4922 | mask = 1 << (offset % 8); | |
4923 | offset /= 8; | |
4924 | if (PL_reg_poscache[offset] & mask) { | |
4925 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, | |
4926 | "%*s whilem: (cache) already tried at this position...\n", | |
4927 | REPORT_CODE_OFF+depth*2, "") | |
2c2d71f5 | 4928 | ); |
3298f257 | 4929 | sayNO; /* cache records failure */ |
2c2d71f5 | 4930 | } |
c476f425 DM |
4931 | ST.cache_offset = offset; |
4932 | ST.cache_mask = mask; | |
2c2d71f5 | 4933 | } |
c476f425 | 4934 | } |
2c2d71f5 | 4935 | |
c476f425 | 4936 | /* Prefer B over A for minimal matching. */ |
a687059c | 4937 | |
c476f425 DM |
4938 | if (cur_curlyx->u.curlyx.minmod) { |
4939 | ST.save_curlyx = cur_curlyx; | |
4940 | cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx; | |
b93070ed | 4941 | ST.cp = regcppush(rex, ST.save_curlyx->u.curlyx.parenfloor); |
c476f425 DM |
4942 | REGCP_SET(ST.lastcp); |
4943 | PUSH_YES_STATE_GOTO(WHILEM_B_min, ST.save_curlyx->u.curlyx.B); | |
118e2215 | 4944 | assert(0); /* NOTREACHED */ |
c476f425 | 4945 | } |
a0d0e21e | 4946 | |
c476f425 DM |
4947 | /* Prefer A over B for maximal matching. */ |
4948 | ||
d02d6d97 | 4949 | if (n < max) { /* More greed allowed? */ |
b93070ed | 4950 | ST.cp = regcppush(rex, cur_curlyx->u.curlyx.parenfloor); |
c476f425 DM |
4951 | cur_curlyx->u.curlyx.lastloc = locinput; |
4952 | REGCP_SET(ST.lastcp); | |
d02d6d97 | 4953 | PUSH_STATE_GOTO(WHILEM_A_max, A); |
118e2215 | 4954 | assert(0); /* NOTREACHED */ |
c476f425 DM |
4955 | } |
4956 | goto do_whilem_B_max; | |
4957 | } | |
118e2215 | 4958 | assert(0); /* NOTREACHED */ |
c476f425 DM |
4959 | |
4960 | case WHILEM_B_min: /* just matched B in a minimal match */ | |
4961 | case WHILEM_B_max: /* just matched B in a maximal match */ | |
4962 | cur_curlyx = ST.save_curlyx; | |
4963 | sayYES; | |
118e2215 | 4964 | assert(0); /* NOTREACHED */ |
c476f425 DM |
4965 | |
4966 | case WHILEM_B_max_fail: /* just failed to match B in a maximal match */ | |
4967 | cur_curlyx = ST.save_curlyx; | |
4968 | cur_curlyx->u.curlyx.lastloc = ST.save_lastloc; | |
4969 | cur_curlyx->u.curlyx.count--; | |
4970 | CACHEsayNO; | |
118e2215 | 4971 | assert(0); /* NOTREACHED */ |
c476f425 DM |
4972 | |
4973 | case WHILEM_A_min_fail: /* just failed to match A in a minimal match */ | |
c476f425 DM |
4974 | /* FALL THROUGH */ |
4975 | case WHILEM_A_pre_fail: /* just failed to match even minimal A */ | |
92e82afa YO |
4976 | REGCP_UNWIND(ST.lastcp); |
4977 | regcppop(rex); | |
c476f425 DM |
4978 | cur_curlyx->u.curlyx.lastloc = ST.save_lastloc; |
4979 | cur_curlyx->u.curlyx.count--; | |
4980 | CACHEsayNO; | |
118e2215 | 4981 | assert(0); /* NOTREACHED */ |
c476f425 DM |
4982 | |
4983 | case WHILEM_A_max_fail: /* just failed to match A in a maximal match */ | |
4984 | REGCP_UNWIND(ST.lastcp); | |
4985 | regcppop(rex); /* Restore some previous $<digit>s? */ | |
4986 | PL_reginput = locinput; | |
4987 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, | |
4988 | "%*s whilem: failed, trying continuation...\n", | |
4989 | REPORT_CODE_OFF+depth*2, "") | |
4990 | ); | |
4991 | do_whilem_B_max: | |
4992 | if (cur_curlyx->u.curlyx.count >= REG_INFTY | |
4993 | && ckWARN(WARN_REGEXP) | |
4994 | && !(PL_reg_flags & RF_warned)) | |
4995 | { | |
4996 | PL_reg_flags |= RF_warned; | |
dcbac5bb FC |
4997 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), |
4998 | "Complex regular subexpression recursion limit (%d) " | |
4999 | "exceeded", | |
c476f425 DM |
5000 | REG_INFTY - 1); |
5001 | } | |
5002 | ||
5003 | /* now try B */ | |
5004 | ST.save_curlyx = cur_curlyx; | |
5005 | cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx; | |
5006 | PUSH_YES_STATE_GOTO(WHILEM_B_max, ST.save_curlyx->u.curlyx.B); | |
118e2215 | 5007 | assert(0); /* NOTREACHED */ |
c476f425 DM |
5008 | |
5009 | case WHILEM_B_min_fail: /* just failed to match B in a minimal match */ | |
5010 | cur_curlyx = ST.save_curlyx; | |
5011 | REGCP_UNWIND(ST.lastcp); | |
5012 | regcppop(rex); | |
5013 | ||
d02d6d97 | 5014 | if (cur_curlyx->u.curlyx.count >= /*max*/ARG2(cur_curlyx->u.curlyx.me)) { |
c476f425 DM |
5015 | /* Maximum greed exceeded */ |
5016 | if (cur_curlyx->u.curlyx.count >= REG_INFTY | |
5017 | && ckWARN(WARN_REGEXP) | |
5018 | && !(PL_reg_flags & RF_warned)) | |
5019 | { | |
3280af22 | 5020 | PL_reg_flags |= RF_warned; |
c476f425 | 5021 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), |
dcbac5bb FC |
5022 | "Complex regular subexpression recursion " |
5023 | "limit (%d) exceeded", | |
c476f425 | 5024 | REG_INFTY - 1); |
a0d0e21e | 5025 | } |
c476f425 | 5026 | cur_curlyx->u.curlyx.count--; |
3ab3c9b4 | 5027 | CACHEsayNO; |
a0d0e21e | 5028 | } |
c476f425 DM |
5029 | |
5030 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, | |
5031 | "%*s trying longer...\n", REPORT_CODE_OFF+depth*2, "") | |
5032 | ); | |
5033 | /* Try grabbing another A and see if it helps. */ | |
5034 | PL_reginput = locinput; | |
5035 | cur_curlyx->u.curlyx.lastloc = locinput; | |
b93070ed | 5036 | ST.cp = regcppush(rex, cur_curlyx->u.curlyx.parenfloor); |
c476f425 | 5037 | REGCP_SET(ST.lastcp); |
d02d6d97 DM |
5038 | PUSH_STATE_GOTO(WHILEM_A_min, |
5039 | /*A*/ NEXTOPER(ST.save_curlyx->u.curlyx.me) + EXTRA_STEP_2ARGS); | |
118e2215 | 5040 | assert(0); /* NOTREACHED */ |
40a82448 DM |
5041 | |
5042 | #undef ST | |
5043 | #define ST st->u.branch | |
5044 | ||
5045 | case BRANCHJ: /* /(...|A|...)/ with long next pointer */ | |
c277df42 IZ |
5046 | next = scan + ARG(scan); |
5047 | if (next == scan) | |
5048 | next = NULL; | |
40a82448 DM |
5049 | scan = NEXTOPER(scan); |
5050 | /* FALL THROUGH */ | |
c277df42 | 5051 | |
40a82448 DM |
5052 | case BRANCH: /* /(...|A|...)/ */ |
5053 | scan = NEXTOPER(scan); /* scan now points to inner node */ | |
b93070ed | 5054 | ST.lastparen = rex->lastparen; |
f6033a9d | 5055 | ST.lastcloseparen = rex->lastcloseparen; |
40a82448 DM |
5056 | ST.next_branch = next; |
5057 | REGCP_SET(ST.cp); | |
5058 | PL_reginput = locinput; | |
02db2b7b | 5059 | |
40a82448 | 5060 | /* Now go into the branch */ |
5d458dd8 YO |
5061 | if (has_cutgroup) { |
5062 | PUSH_YES_STATE_GOTO(BRANCH_next, scan); | |
5063 | } else { | |
5064 | PUSH_STATE_GOTO(BRANCH_next, scan); | |
5065 | } | |
118e2215 | 5066 | assert(0); /* NOTREACHED */ |
5d458dd8 YO |
5067 | case CUTGROUP: |
5068 | PL_reginput = locinput; | |
5069 | sv_yes_mark = st->u.mark.mark_name = scan->flags ? NULL : | |
ad64d0ec | 5070 | MUTABLE_SV(rexi->data->data[ ARG( scan ) ]); |
5d458dd8 | 5071 | PUSH_STATE_GOTO(CUTGROUP_next,next); |
118e2215 | 5072 | assert(0); /* NOTREACHED */ |
5d458dd8 YO |
5073 | case CUTGROUP_next_fail: |
5074 | do_cutgroup = 1; | |
5075 | no_final = 1; | |
5076 | if (st->u.mark.mark_name) | |
5077 | sv_commit = st->u.mark.mark_name; | |
5078 | sayNO; | |
118e2215 | 5079 | assert(0); /* NOTREACHED */ |
5d458dd8 YO |
5080 | case BRANCH_next: |
5081 | sayYES; | |
118e2215 | 5082 | assert(0); /* NOTREACHED */ |
40a82448 | 5083 | case BRANCH_next_fail: /* that branch failed; try the next, if any */ |
5d458dd8 YO |
5084 | if (do_cutgroup) { |
5085 | do_cutgroup = 0; | |
5086 | no_final = 0; | |
5087 | } | |
40a82448 | 5088 | REGCP_UNWIND(ST.cp); |
a8d1f4b4 | 5089 | UNWIND_PAREN(ST.lastparen, ST.lastcloseparen); |
40a82448 DM |
5090 | scan = ST.next_branch; |
5091 | /* no more branches? */ | |
5d458dd8 YO |
5092 | if (!scan || (OP(scan) != BRANCH && OP(scan) != BRANCHJ)) { |
5093 | DEBUG_EXECUTE_r({ | |
5094 | PerlIO_printf( Perl_debug_log, | |
5095 | "%*s %sBRANCH failed...%s\n", | |
5096 | REPORT_CODE_OFF+depth*2, "", | |
5097 | PL_colors[4], | |
5098 | PL_colors[5] ); | |
5099 | }); | |
5100 | sayNO_SILENT; | |
5101 | } | |
40a82448 | 5102 | continue; /* execute next BRANCH[J] op */ |
118e2215 | 5103 | assert(0); /* NOTREACHED */ |
40a82448 | 5104 | |
a0d0e21e | 5105 | case MINMOD: |
24d3c4a9 | 5106 | minmod = 1; |
a0d0e21e | 5107 | break; |
40a82448 DM |
5108 | |
5109 | #undef ST | |
5110 | #define ST st->u.curlym | |
5111 | ||
5112 | case CURLYM: /* /A{m,n}B/ where A is fixed-length */ | |
5113 | ||
5114 | /* This is an optimisation of CURLYX that enables us to push | |
84d2fa14 | 5115 | * only a single backtracking state, no matter how many matches |
40a82448 DM |
5116 | * there are in {m,n}. It relies on the pattern being constant |
5117 | * length, with no parens to influence future backrefs | |
5118 | */ | |
5119 | ||
5120 | ST.me = scan; | |
dc45a647 | 5121 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
40a82448 | 5122 | |
f6033a9d DM |
5123 | ST.lastparen = rex->lastparen; |
5124 | ST.lastcloseparen = rex->lastcloseparen; | |
5125 | ||
40a82448 DM |
5126 | /* if paren positive, emulate an OPEN/CLOSE around A */ |
5127 | if (ST.me->flags) { | |
3b6647e0 | 5128 | U32 paren = ST.me->flags; |
40a82448 DM |
5129 | if (paren > PL_regsize) |
5130 | PL_regsize = paren; | |
c277df42 | 5131 | scan += NEXT_OFF(scan); /* Skip former OPEN. */ |
6407bf3b | 5132 | } |
40a82448 DM |
5133 | ST.A = scan; |
5134 | ST.B = next; | |
5135 | ST.alen = 0; | |
5136 | ST.count = 0; | |
24d3c4a9 DM |
5137 | ST.minmod = minmod; |
5138 | minmod = 0; | |
40a82448 DM |
5139 | ST.c1 = CHRTEST_UNINIT; |
5140 | REGCP_SET(ST.cp); | |
6407bf3b | 5141 | |
40a82448 DM |
5142 | if (!(ST.minmod ? ARG1(ST.me) : ARG2(ST.me))) /* min/max */ |
5143 | goto curlym_do_B; | |
5144 | ||
5145 | curlym_do_A: /* execute the A in /A{m,n}B/ */ | |
6407bf3b | 5146 | PL_reginput = locinput; |
40a82448 | 5147 | PUSH_YES_STATE_GOTO(CURLYM_A, ST.A); /* match A */ |
118e2215 | 5148 | assert(0); /* NOTREACHED */ |
5f80c4cf | 5149 | |
40a82448 DM |
5150 | case CURLYM_A: /* we've just matched an A */ |
5151 | locinput = st->locinput; | |
5152 | nextchr = UCHARAT(locinput); | |
5153 | ||
5154 | ST.count++; | |
5155 | /* after first match, determine A's length: u.curlym.alen */ | |
5156 | if (ST.count == 1) { | |
5157 | if (PL_reg_match_utf8) { | |
5158 | char *s = locinput; | |
5159 | while (s < PL_reginput) { | |
5160 | ST.alen++; | |
5161 | s += UTF8SKIP(s); | |
5162 | } | |
5163 | } | |
5164 | else { | |
5165 | ST.alen = PL_reginput - locinput; | |
5166 | } | |
5167 | if (ST.alen == 0) | |
5168 | ST.count = ST.minmod ? ARG1(ST.me) : ARG2(ST.me); | |
5169 | } | |
0cadcf80 DM |
5170 | DEBUG_EXECUTE_r( |
5171 | PerlIO_printf(Perl_debug_log, | |
40a82448 | 5172 | "%*s CURLYM now matched %"IVdf" times, len=%"IVdf"...\n", |
5bc10b2c | 5173 | (int)(REPORT_CODE_OFF+(depth*2)), "", |
40a82448 | 5174 | (IV) ST.count, (IV)ST.alen) |
0cadcf80 DM |
5175 | ); |
5176 | ||
40a82448 | 5177 | locinput = PL_reginput; |
0a4db386 YO |
5178 | |
5179 | if (cur_eval && cur_eval->u.eval.close_paren && | |
24b23f37 | 5180 | cur_eval->u.eval.close_paren == (U32)ST.me->flags) |
0a4db386 YO |
5181 | goto fake_end; |
5182 | ||
c966426a DM |
5183 | { |
5184 | I32 max = (ST.minmod ? ARG1(ST.me) : ARG2(ST.me)); | |
5185 | if ( max == REG_INFTY || ST.count < max ) | |
5186 | goto curlym_do_A; /* try to match another A */ | |
5187 | } | |
40a82448 | 5188 | goto curlym_do_B; /* try to match B */ |
5f80c4cf | 5189 | |
40a82448 DM |
5190 | case CURLYM_A_fail: /* just failed to match an A */ |
5191 | REGCP_UNWIND(ST.cp); | |
0a4db386 YO |
5192 | |
5193 | if (ST.minmod || ST.count < ARG1(ST.me) /* min*/ | |
5194 | || (cur_eval && cur_eval->u.eval.close_paren && | |
24b23f37 | 5195 | cur_eval->u.eval.close_paren == (U32)ST.me->flags)) |
40a82448 | 5196 | sayNO; |
0cadcf80 | 5197 | |
40a82448 DM |
5198 | curlym_do_B: /* execute the B in /A{m,n}B/ */ |
5199 | PL_reginput = locinput; | |
5200 | if (ST.c1 == CHRTEST_UNINIT) { | |
5201 | /* calculate c1 and c2 for possible match of 1st char | |
5202 | * following curly */ | |
5203 | ST.c1 = ST.c2 = CHRTEST_VOID; | |
5204 | if (HAS_TEXT(ST.B) || JUMPABLE(ST.B)) { | |
5205 | regnode *text_node = ST.B; | |
5206 | if (! HAS_TEXT(text_node)) | |
5207 | FIND_NEXT_IMPT(text_node); | |
ee9b8eae YO |
5208 | /* this used to be |
5209 | ||
5210 | (HAS_TEXT(text_node) && PL_regkind[OP(text_node)] == EXACT) | |
5211 | ||
5212 | But the former is redundant in light of the latter. | |
5213 | ||
5214 | if this changes back then the macro for | |
5215 | IS_TEXT and friends need to change. | |
5216 | */ | |
5217 | if (PL_regkind[OP(text_node)] == EXACT) | |
40a82448 | 5218 | { |
ee9b8eae | 5219 | |
40a82448 | 5220 | ST.c1 = (U8)*STRING(text_node); |
9a5a5549 KW |
5221 | switch (OP(text_node)) { |
5222 | case EXACTF: ST.c2 = PL_fold[ST.c1]; break; | |
2f7f8cb1 | 5223 | case EXACTFA: |
3c760661 | 5224 | case EXACTFU_SS: |
fab2782b | 5225 | case EXACTFU_TRICKYFOLD: |
9a5a5549 KW |
5226 | case EXACTFU: ST.c2 = PL_fold_latin1[ST.c1]; break; |
5227 | case EXACTFL: ST.c2 = PL_fold_locale[ST.c1]; break; | |
5228 | default: ST.c2 = ST.c1; | |
5229 | } | |
c277df42 | 5230 | } |
c277df42 | 5231 | } |
40a82448 DM |
5232 | } |
5233 | ||
5234 | DEBUG_EXECUTE_r( | |
5235 | PerlIO_printf(Perl_debug_log, | |
5236 | "%*s CURLYM trying tail with matches=%"IVdf"...\n", | |
5bc10b2c | 5237 | (int)(REPORT_CODE_OFF+(depth*2)), |
40a82448 DM |
5238 | "", (IV)ST.count) |
5239 | ); | |
5240 | if (ST.c1 != CHRTEST_VOID | |
5241 | && UCHARAT(PL_reginput) != ST.c1 | |
5242 | && UCHARAT(PL_reginput) != ST.c2) | |
5243 | { | |
5244 | /* simulate B failing */ | |
3e901dc0 YO |
5245 | DEBUG_OPTIMISE_r( |
5246 | PerlIO_printf(Perl_debug_log, | |
5247 | "%*s CURLYM Fast bail c1=%"IVdf" c2=%"IVdf"\n", | |
5248 | (int)(REPORT_CODE_OFF+(depth*2)),"", | |
5249 | (IV)ST.c1,(IV)ST.c2 | |
5250 | )); | |
40a82448 DM |
5251 | state_num = CURLYM_B_fail; |
5252 | goto reenter_switch; | |
5253 | } | |
5254 | ||
5255 | if (ST.me->flags) { | |
f6033a9d | 5256 | /* emulate CLOSE: mark current A as captured */ |
40a82448 DM |
5257 | I32 paren = ST.me->flags; |
5258 | if (ST.count) { | |
b93070ed | 5259 | rex->offs[paren].start |
40a82448 | 5260 | = HOPc(PL_reginput, -ST.alen) - PL_bostr; |
b93070ed | 5261 | rex->offs[paren].end = PL_reginput - PL_bostr; |
f6033a9d DM |
5262 | if ((U32)paren > rex->lastparen) |
5263 | rex->lastparen = paren; | |
5264 | rex->lastcloseparen = paren; | |
c277df42 | 5265 | } |
40a82448 | 5266 | else |
b93070ed | 5267 | rex->offs[paren].end = -1; |
0a4db386 | 5268 | if (cur_eval && cur_eval->u.eval.close_paren && |
24b23f37 | 5269 | cur_eval->u.eval.close_paren == (U32)ST.me->flags) |
0a4db386 YO |
5270 | { |
5271 | if (ST.count) | |
5272 | goto fake_end; | |
5273 | else | |
5274 | sayNO; | |
5275 | } | |
c277df42 | 5276 | } |
0a4db386 | 5277 | |
40a82448 | 5278 | PUSH_STATE_GOTO(CURLYM_B, ST.B); /* match B */ |
118e2215 | 5279 | assert(0); /* NOTREACHED */ |
40a82448 DM |
5280 | |
5281 | case CURLYM_B_fail: /* just failed to match a B */ | |
5282 | REGCP_UNWIND(ST.cp); | |
a8d1f4b4 | 5283 | UNWIND_PAREN(ST.lastparen, ST.lastcloseparen); |
40a82448 | 5284 | if (ST.minmod) { |
84d2fa14 HS |
5285 | I32 max = ARG2(ST.me); |
5286 | if (max != REG_INFTY && ST.count == max) | |
40a82448 DM |
5287 | sayNO; |
5288 | goto curlym_do_A; /* try to match a further A */ | |
5289 | } | |
5290 | /* backtrack one A */ | |
5291 | if (ST.count == ARG1(ST.me) /* min */) | |
5292 | sayNO; | |
5293 | ST.count--; | |
5294 | locinput = HOPc(locinput, -ST.alen); | |
5295 | goto curlym_do_B; /* try to match B */ | |
5296 | ||
c255a977 DM |
5297 | #undef ST |
5298 | #define ST st->u.curly | |
40a82448 | 5299 | |
c255a977 DM |
5300 | #define CURLY_SETPAREN(paren, success) \ |
5301 | if (paren) { \ | |
5302 | if (success) { \ | |
b93070ed DM |
5303 | rex->offs[paren].start = HOPc(locinput, -1) - PL_bostr; \ |
5304 | rex->offs[paren].end = locinput - PL_bostr; \ | |
f6033a9d DM |
5305 | if (paren > rex->lastparen) \ |
5306 | rex->lastparen = paren; \ | |
b93070ed | 5307 | rex->lastcloseparen = paren; \ |
c255a977 | 5308 | } \ |
f6033a9d | 5309 | else { \ |
b93070ed | 5310 | rex->offs[paren].end = -1; \ |
f6033a9d DM |
5311 | rex->lastparen = ST.lastparen; \ |
5312 | rex->lastcloseparen = ST.lastcloseparen; \ | |
5313 | } \ | |
c255a977 DM |
5314 | } |
5315 | ||
5316 | case STAR: /* /A*B/ where A is width 1 */ | |
5317 | ST.paren = 0; | |
5318 | ST.min = 0; | |
5319 | ST.max = REG_INFTY; | |
a0d0e21e LW |
5320 | scan = NEXTOPER(scan); |
5321 | goto repeat; | |
c255a977 DM |
5322 | case PLUS: /* /A+B/ where A is width 1 */ |
5323 | ST.paren = 0; | |
5324 | ST.min = 1; | |
5325 | ST.max = REG_INFTY; | |
c277df42 | 5326 | scan = NEXTOPER(scan); |
c255a977 DM |
5327 | goto repeat; |
5328 | case CURLYN: /* /(A){m,n}B/ where A is width 1 */ | |
5329 | ST.paren = scan->flags; /* Which paren to set */ | |
f6033a9d DM |
5330 | ST.lastparen = rex->lastparen; |
5331 | ST.lastcloseparen = rex->lastcloseparen; | |
c255a977 DM |
5332 | if (ST.paren > PL_regsize) |
5333 | PL_regsize = ST.paren; | |
c255a977 DM |
5334 | ST.min = ARG1(scan); /* min to match */ |
5335 | ST.max = ARG2(scan); /* max to match */ | |
0a4db386 | 5336 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 5337 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
0a4db386 YO |
5338 | ST.min=1; |
5339 | ST.max=1; | |
5340 | } | |
c255a977 DM |
5341 | scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE); |
5342 | goto repeat; | |
5343 | case CURLY: /* /A{m,n}B/ where A is width 1 */ | |
5344 | ST.paren = 0; | |
5345 | ST.min = ARG1(scan); /* min to match */ | |
5346 | ST.max = ARG2(scan); /* max to match */ | |
5347 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; | |
c277df42 | 5348 | repeat: |
a0d0e21e LW |
5349 | /* |
5350 | * Lookahead to avoid useless match attempts | |
5351 | * when we know what character comes next. | |
c255a977 | 5352 | * |
5f80c4cf JP |
5353 | * Used to only do .*x and .*?x, but now it allows |
5354 | * for )'s, ('s and (?{ ... })'s to be in the way | |
5355 | * of the quantifier and the EXACT-like node. -- japhy | |
5356 | */ | |
5357 | ||
c255a977 DM |
5358 | if (ST.min > ST.max) /* XXX make this a compile-time check? */ |
5359 | sayNO; | |
cca55fe3 | 5360 | if (HAS_TEXT(next) || JUMPABLE(next)) { |
5f80c4cf JP |
5361 | U8 *s; |
5362 | regnode *text_node = next; | |
5363 | ||
3dab1dad YO |
5364 | if (! HAS_TEXT(text_node)) |
5365 | FIND_NEXT_IMPT(text_node); | |
5f80c4cf | 5366 | |
9e137952 | 5367 | if (! HAS_TEXT(text_node)) |
c255a977 | 5368 | ST.c1 = ST.c2 = CHRTEST_VOID; |
5f80c4cf | 5369 | else { |
ee9b8eae | 5370 | if ( PL_regkind[OP(text_node)] != EXACT ) { |
c255a977 | 5371 | ST.c1 = ST.c2 = CHRTEST_VOID; |
44a68960 | 5372 | goto assume_ok_easy; |
cca55fe3 | 5373 | } |
be8e71aa YO |
5374 | else |
5375 | s = (U8*)STRING(text_node); | |
ee9b8eae YO |
5376 | |
5377 | /* Currently we only get here when | |
5378 | ||
5379 | PL_rekind[OP(text_node)] == EXACT | |
5380 | ||
5381 | if this changes back then the macro for IS_TEXT and | |
5382 | friends need to change. */ | |
f2ed9b32 | 5383 | if (!UTF_PATTERN) { |
9a5a5549 KW |
5384 | ST.c1 = *s; |
5385 | switch (OP(text_node)) { | |
5386 | case EXACTF: ST.c2 = PL_fold[ST.c1]; break; | |
2f7f8cb1 | 5387 | case EXACTFA: |
3c760661 | 5388 | case EXACTFU_SS: |
fab2782b | 5389 | case EXACTFU_TRICKYFOLD: |
9a5a5549 KW |
5390 | case EXACTFU: ST.c2 = PL_fold_latin1[ST.c1]; break; |
5391 | case EXACTFL: ST.c2 = PL_fold_locale[ST.c1]; break; | |
5392 | default: ST.c2 = ST.c1; break; | |
5393 | } | |
1aa99e6b | 5394 | } |
f2ed9b32 | 5395 | else { /* UTF_PATTERN */ |
9a5a5549 | 5396 | if (IS_TEXTFU(text_node) || IS_TEXTF(text_node)) { |
b0573d8b KW |
5397 | STRLEN ulen; |
5398 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1]; | |
5399 | ||
5400 | to_utf8_fold((U8*)s, tmpbuf, &ulen); | |
5401 | ST.c1 = ST.c2 = utf8n_to_uvchr(tmpbuf, UTF8_MAXLEN, 0, | |
e294cc5d | 5402 | uniflags); |
5f80c4cf JP |
5403 | } |
5404 | else { | |
c255a977 | 5405 | ST.c2 = ST.c1 = utf8n_to_uvchr(s, UTF8_MAXBYTES, 0, |
041457d9 | 5406 | uniflags); |
5f80c4cf | 5407 | } |
1aa99e6b IH |
5408 | } |
5409 | } | |
bbce6d69 | 5410 | } |
a0d0e21e | 5411 | else |
c255a977 | 5412 | ST.c1 = ST.c2 = CHRTEST_VOID; |
cca55fe3 | 5413 | assume_ok_easy: |
c255a977 DM |
5414 | |
5415 | ST.A = scan; | |
5416 | ST.B = next; | |
3280af22 | 5417 | PL_reginput = locinput; |
24d3c4a9 DM |
5418 | if (minmod) { |
5419 | minmod = 0; | |
e2e6a0f1 | 5420 | if (ST.min && regrepeat(rex, ST.A, ST.min, depth) < ST.min) |
4633a7c4 | 5421 | sayNO; |
c255a977 | 5422 | ST.count = ST.min; |
a0ed51b3 | 5423 | locinput = PL_reginput; |
c255a977 DM |
5424 | REGCP_SET(ST.cp); |
5425 | if (ST.c1 == CHRTEST_VOID) | |
5426 | goto curly_try_B_min; | |
5427 | ||
5428 | ST.oldloc = locinput; | |
5429 | ||
5430 | /* set ST.maxpos to the furthest point along the | |
5431 | * string that could possibly match */ | |
5432 | if (ST.max == REG_INFTY) { | |
5433 | ST.maxpos = PL_regeol - 1; | |
f2ed9b32 | 5434 | if (utf8_target) |
c255a977 DM |
5435 | while (UTF8_IS_CONTINUATION(*(U8*)ST.maxpos)) |
5436 | ST.maxpos--; | |
5437 | } | |
f2ed9b32 | 5438 | else if (utf8_target) { |
c255a977 DM |
5439 | int m = ST.max - ST.min; |
5440 | for (ST.maxpos = locinput; | |
5441 | m >0 && ST.maxpos + UTF8SKIP(ST.maxpos) <= PL_regeol; m--) | |
5442 | ST.maxpos += UTF8SKIP(ST.maxpos); | |
5443 | } | |
5444 | else { | |
5445 | ST.maxpos = locinput + ST.max - ST.min; | |
5446 | if (ST.maxpos >= PL_regeol) | |
5447 | ST.maxpos = PL_regeol - 1; | |
5448 | } | |
5449 | goto curly_try_B_min_known; | |
5450 | ||
5451 | } | |
5452 | else { | |
e2e6a0f1 | 5453 | ST.count = regrepeat(rex, ST.A, ST.max, depth); |
c255a977 DM |
5454 | locinput = PL_reginput; |
5455 | if (ST.count < ST.min) | |
5456 | sayNO; | |
5457 | if ((ST.count > ST.min) | |
5458 | && (PL_regkind[OP(ST.B)] == EOL) && (OP(ST.B) != MEOL)) | |
5459 | { | |
5460 | /* A{m,n} must come at the end of the string, there's | |
5461 | * no point in backing off ... */ | |
5462 | ST.min = ST.count; | |
5463 | /* ...except that $ and \Z can match before *and* after | |
5464 | newline at the end. Consider "\n\n" =~ /\n+\Z\n/. | |
5465 | We may back off by one in this case. */ | |
5466 | if (UCHARAT(PL_reginput - 1) == '\n' && OP(ST.B) != EOS) | |
5467 | ST.min--; | |
5468 | } | |
5469 | REGCP_SET(ST.cp); | |
5470 | goto curly_try_B_max; | |
5471 | } | |
118e2215 | 5472 | assert(0); /* NOTREACHED */ |
c255a977 DM |
5473 | |
5474 | ||
5475 | case CURLY_B_min_known_fail: | |
5476 | /* failed to find B in a non-greedy match where c1,c2 valid */ | |
c255a977 DM |
5477 | |
5478 | PL_reginput = locinput; /* Could be reset... */ | |
5479 | REGCP_UNWIND(ST.cp); | |
a8d1f4b4 DM |
5480 | if (ST.paren) { |
5481 | UNWIND_PAREN(ST.lastparen, ST.lastcloseparen); | |
5482 | } | |
c255a977 DM |
5483 | /* Couldn't or didn't -- move forward. */ |
5484 | ST.oldloc = locinput; | |
f2ed9b32 | 5485 | if (utf8_target) |
c255a977 DM |
5486 | locinput += UTF8SKIP(locinput); |
5487 | else | |
5488 | locinput++; | |
5489 | ST.count++; | |
5490 | curly_try_B_min_known: | |
5491 | /* find the next place where 'B' could work, then call B */ | |
5492 | { | |
5493 | int n; | |
f2ed9b32 | 5494 | if (utf8_target) { |
c255a977 DM |
5495 | n = (ST.oldloc == locinput) ? 0 : 1; |
5496 | if (ST.c1 == ST.c2) { | |
5497 | STRLEN len; | |
5498 | /* set n to utf8_distance(oldloc, locinput) */ | |
5499 | while (locinput <= ST.maxpos && | |
5500 | utf8n_to_uvchr((U8*)locinput, | |
5501 | UTF8_MAXBYTES, &len, | |
5502 | uniflags) != (UV)ST.c1) { | |
5503 | locinput += len; | |
5504 | n++; | |
5505 | } | |
1aa99e6b IH |
5506 | } |
5507 | else { | |
c255a977 DM |
5508 | /* set n to utf8_distance(oldloc, locinput) */ |
5509 | while (locinput <= ST.maxpos) { | |
5510 | STRLEN len; | |
5511 | const UV c = utf8n_to_uvchr((U8*)locinput, | |
5512 | UTF8_MAXBYTES, &len, | |
5513 | uniflags); | |
5514 | if (c == (UV)ST.c1 || c == (UV)ST.c2) | |
5515 | break; | |
5516 | locinput += len; | |
5517 | n++; | |
1aa99e6b | 5518 | } |
0fe9bf95 IZ |
5519 | } |
5520 | } | |
c255a977 DM |
5521 | else { |
5522 | if (ST.c1 == ST.c2) { | |
5523 | while (locinput <= ST.maxpos && | |
5524 | UCHARAT(locinput) != ST.c1) | |
5525 | locinput++; | |
bbce6d69 | 5526 | } |
c255a977 DM |
5527 | else { |
5528 | while (locinput <= ST.maxpos | |
5529 | && UCHARAT(locinput) != ST.c1 | |
5530 | && UCHARAT(locinput) != ST.c2) | |
5531 | locinput++; | |
a0ed51b3 | 5532 | } |
c255a977 DM |
5533 | n = locinput - ST.oldloc; |
5534 | } | |
5535 | if (locinput > ST.maxpos) | |
5536 | sayNO; | |
5537 | /* PL_reginput == oldloc now */ | |
5538 | if (n) { | |
5539 | ST.count += n; | |
e2e6a0f1 | 5540 | if (regrepeat(rex, ST.A, n, depth) < n) |
4633a7c4 | 5541 | sayNO; |
a0d0e21e | 5542 | } |
c255a977 DM |
5543 | PL_reginput = locinput; |
5544 | CURLY_SETPAREN(ST.paren, ST.count); | |
0a4db386 | 5545 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 5546 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
0a4db386 YO |
5547 | goto fake_end; |
5548 | } | |
c255a977 | 5549 | PUSH_STATE_GOTO(CURLY_B_min_known, ST.B); |
a0d0e21e | 5550 | } |
118e2215 | 5551 | assert(0); /* NOTREACHED */ |
c255a977 DM |
5552 | |
5553 | ||
5554 | case CURLY_B_min_fail: | |
5555 | /* failed to find B in a non-greedy match where c1,c2 invalid */ | |
c255a977 DM |
5556 | |
5557 | REGCP_UNWIND(ST.cp); | |
a8d1f4b4 DM |
5558 | if (ST.paren) { |
5559 | UNWIND_PAREN(ST.lastparen, ST.lastcloseparen); | |
5560 | } | |
c255a977 DM |
5561 | /* failed -- move forward one */ |
5562 | PL_reginput = locinput; | |
e2e6a0f1 | 5563 | if (regrepeat(rex, ST.A, 1, depth)) { |
c255a977 | 5564 | ST.count++; |
a0ed51b3 | 5565 | locinput = PL_reginput; |
c255a977 DM |
5566 | if (ST.count <= ST.max || (ST.max == REG_INFTY && |
5567 | ST.count > 0)) /* count overflow ? */ | |
15272685 | 5568 | { |
c255a977 DM |
5569 | curly_try_B_min: |
5570 | CURLY_SETPAREN(ST.paren, ST.count); | |
0a4db386 | 5571 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 5572 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
0a4db386 YO |
5573 | goto fake_end; |
5574 | } | |
c255a977 | 5575 | PUSH_STATE_GOTO(CURLY_B_min, ST.B); |
a0d0e21e LW |
5576 | } |
5577 | } | |
4633a7c4 | 5578 | sayNO; |
118e2215 | 5579 | assert(0); /* NOTREACHED */ |
c255a977 DM |
5580 | |
5581 | ||
5582 | curly_try_B_max: | |
5583 | /* a successful greedy match: now try to match B */ | |
40d049e4 | 5584 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 5585 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
40d049e4 YO |
5586 | goto fake_end; |
5587 | } | |
c255a977 DM |
5588 | { |
5589 | UV c = 0; | |
5590 | if (ST.c1 != CHRTEST_VOID) | |
f2ed9b32 | 5591 | c = utf8_target ? utf8n_to_uvchr((U8*)PL_reginput, |
c255a977 | 5592 | UTF8_MAXBYTES, 0, uniflags) |
466787eb | 5593 | : (UV) UCHARAT(PL_reginput); |
c255a977 DM |
5594 | /* If it could work, try it. */ |
5595 | if (ST.c1 == CHRTEST_VOID || c == (UV)ST.c1 || c == (UV)ST.c2) { | |
5596 | CURLY_SETPAREN(ST.paren, ST.count); | |
5597 | PUSH_STATE_GOTO(CURLY_B_max, ST.B); | |
118e2215 | 5598 | assert(0); /* NOTREACHED */ |
c255a977 DM |
5599 | } |
5600 | } | |
5601 | /* FALL THROUGH */ | |
5602 | case CURLY_B_max_fail: | |
5603 | /* failed to find B in a greedy match */ | |
c255a977 DM |
5604 | |
5605 | REGCP_UNWIND(ST.cp); | |
a8d1f4b4 DM |
5606 | if (ST.paren) { |
5607 | UNWIND_PAREN(ST.lastparen, ST.lastcloseparen); | |
5608 | } | |
c255a977 DM |
5609 | /* back up. */ |
5610 | if (--ST.count < ST.min) | |
5611 | sayNO; | |
5612 | PL_reginput = locinput = HOPc(locinput, -1); | |
5613 | goto curly_try_B_max; | |
5614 | ||
5615 | #undef ST | |
5616 | ||
a0d0e21e | 5617 | case END: |
6bda09f9 | 5618 | fake_end: |
faec1544 DM |
5619 | if (cur_eval) { |
5620 | /* we've just finished A in /(??{A})B/; now continue with B */ | |
faec1544 DM |
5621 | st->u.eval.toggle_reg_flags |
5622 | = cur_eval->u.eval.toggle_reg_flags; | |
5623 | PL_reg_flags ^= st->u.eval.toggle_reg_flags; | |
5624 | ||
288b8c02 | 5625 | st->u.eval.prev_rex = rex_sv; /* inner */ |
b93070ed | 5626 | st->u.eval.cp = regcppush(rex, 0); /* Save *all* the positions. */ |
ec43f78b DM |
5627 | rex_sv = cur_eval->u.eval.prev_rex; |
5628 | SET_reg_curpm(rex_sv); | |
288b8c02 | 5629 | rex = (struct regexp *)SvANY(rex_sv); |
f8fc2ecf | 5630 | rexi = RXi_GET(rex); |
faec1544 | 5631 | cur_curlyx = cur_eval->u.eval.prev_curlyx; |
34a81e2b | 5632 | |
faec1544 DM |
5633 | REGCP_SET(st->u.eval.lastcp); |
5634 | PL_reginput = locinput; | |
5635 | ||
5636 | /* Restore parens of the outer rex without popping the | |
5637 | * savestack */ | |
74088413 | 5638 | S_regcp_restore(aTHX_ rex, cur_eval->u.eval.lastcp); |
faec1544 DM |
5639 | |
5640 | st->u.eval.prev_eval = cur_eval; | |
5641 | cur_eval = cur_eval->u.eval.prev_eval; | |
5642 | DEBUG_EXECUTE_r( | |
2a49f0f5 JH |
5643 | PerlIO_printf(Perl_debug_log, "%*s EVAL trying tail ... %"UVxf"\n", |
5644 | REPORT_CODE_OFF+depth*2, "",PTR2UV(cur_eval));); | |
e7707071 YO |
5645 | if ( nochange_depth ) |
5646 | nochange_depth--; | |
5647 | ||
5648 | PUSH_YES_STATE_GOTO(EVAL_AB, | |
faec1544 DM |
5649 | st->u.eval.prev_eval->u.eval.B); /* match B */ |
5650 | } | |
5651 | ||
3b0527fe | 5652 | if (locinput < reginfo->till) { |
a3621e74 | 5653 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
7821416a IZ |
5654 | "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n", |
5655 | PL_colors[4], | |
5656 | (long)(locinput - PL_reg_starttry), | |
3b0527fe | 5657 | (long)(reginfo->till - PL_reg_starttry), |
7821416a | 5658 | PL_colors[5])); |
58e23c8d | 5659 | |
262b90c4 | 5660 | sayNO_SILENT; /* Cannot match: too short. */ |
7821416a IZ |
5661 | } |
5662 | PL_reginput = locinput; /* put where regtry can find it */ | |
262b90c4 | 5663 | sayYES; /* Success! */ |
dad79028 DM |
5664 | |
5665 | case SUCCEED: /* successful SUSPEND/UNLESSM/IFMATCH/CURLYM */ | |
5666 | DEBUG_EXECUTE_r( | |
5667 | PerlIO_printf(Perl_debug_log, | |
5668 | "%*s %ssubpattern success...%s\n", | |
5bc10b2c | 5669 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])); |
3280af22 | 5670 | PL_reginput = locinput; /* put where regtry can find it */ |
262b90c4 | 5671 | sayYES; /* Success! */ |
dad79028 | 5672 | |
40a82448 DM |
5673 | #undef ST |
5674 | #define ST st->u.ifmatch | |
5675 | ||
5676 | case SUSPEND: /* (?>A) */ | |
5677 | ST.wanted = 1; | |
9fe1d20c | 5678 | PL_reginput = locinput; |
9041c2e3 | 5679 | goto do_ifmatch; |
dad79028 | 5680 | |
40a82448 DM |
5681 | case UNLESSM: /* -ve lookaround: (?!A), or with flags, (?<!A) */ |
5682 | ST.wanted = 0; | |
dad79028 DM |
5683 | goto ifmatch_trivial_fail_test; |
5684 | ||
40a82448 DM |
5685 | case IFMATCH: /* +ve lookaround: (?=A), or with flags, (?<=A) */ |
5686 | ST.wanted = 1; | |
dad79028 | 5687 | ifmatch_trivial_fail_test: |
a0ed51b3 | 5688 | if (scan->flags) { |
52657f30 | 5689 | char * const s = HOPBACKc(locinput, scan->flags); |
dad79028 DM |
5690 | if (!s) { |
5691 | /* trivial fail */ | |
24d3c4a9 DM |
5692 | if (logical) { |
5693 | logical = 0; | |
f2338a2e | 5694 | sw = 1 - cBOOL(ST.wanted); |
dad79028 | 5695 | } |
40a82448 | 5696 | else if (ST.wanted) |
dad79028 DM |
5697 | sayNO; |
5698 | next = scan + ARG(scan); | |
5699 | if (next == scan) | |
5700 | next = NULL; | |
5701 | break; | |
5702 | } | |
efb30f32 | 5703 | PL_reginput = s; |
a0ed51b3 LW |
5704 | } |
5705 | else | |
5706 | PL_reginput = locinput; | |
5707 | ||
c277df42 | 5708 | do_ifmatch: |
40a82448 | 5709 | ST.me = scan; |
24d3c4a9 | 5710 | ST.logical = logical; |
24d786f4 YO |
5711 | logical = 0; /* XXX: reset state of logical once it has been saved into ST */ |
5712 | ||
40a82448 DM |
5713 | /* execute body of (?...A) */ |
5714 | PUSH_YES_STATE_GOTO(IFMATCH_A, NEXTOPER(NEXTOPER(scan))); | |
118e2215 | 5715 | assert(0); /* NOTREACHED */ |
40a82448 DM |
5716 | |
5717 | case IFMATCH_A_fail: /* body of (?...A) failed */ | |
5718 | ST.wanted = !ST.wanted; | |
5719 | /* FALL THROUGH */ | |
5720 | ||
5721 | case IFMATCH_A: /* body of (?...A) succeeded */ | |
24d3c4a9 | 5722 | if (ST.logical) { |
f2338a2e | 5723 | sw = cBOOL(ST.wanted); |
40a82448 DM |
5724 | } |
5725 | else if (!ST.wanted) | |
5726 | sayNO; | |
5727 | ||
5728 | if (OP(ST.me) == SUSPEND) | |
5729 | locinput = PL_reginput; | |
5730 | else { | |
5731 | locinput = PL_reginput = st->locinput; | |
5732 | nextchr = UCHARAT(locinput); | |
5733 | } | |
5734 | scan = ST.me + ARG(ST.me); | |
5735 | if (scan == ST.me) | |
5736 | scan = NULL; | |
5737 | continue; /* execute B */ | |
5738 | ||
5739 | #undef ST | |
dad79028 | 5740 | |
c277df42 | 5741 | case LONGJMP: |
c277df42 IZ |
5742 | next = scan + ARG(scan); |
5743 | if (next == scan) | |
5744 | next = NULL; | |
a0d0e21e | 5745 | break; |
54612592 | 5746 | case COMMIT: |
e2e6a0f1 YO |
5747 | reginfo->cutpoint = PL_regeol; |
5748 | /* FALLTHROUGH */ | |
5d458dd8 | 5749 | case PRUNE: |
24b23f37 | 5750 | PL_reginput = locinput; |
e2e6a0f1 | 5751 | if (!scan->flags) |
ad64d0ec | 5752 | sv_yes_mark = sv_commit = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]); |
54612592 | 5753 | PUSH_STATE_GOTO(COMMIT_next,next); |
118e2215 | 5754 | assert(0); /* NOTREACHED */ |
54612592 YO |
5755 | case COMMIT_next_fail: |
5756 | no_final = 1; | |
5757 | /* FALLTHROUGH */ | |
7f69552c YO |
5758 | case OPFAIL: |
5759 | sayNO; | |
118e2215 | 5760 | assert(0); /* NOTREACHED */ |
e2e6a0f1 YO |
5761 | |
5762 | #define ST st->u.mark | |
5763 | case MARKPOINT: | |
5764 | ST.prev_mark = mark_state; | |
5d458dd8 | 5765 | ST.mark_name = sv_commit = sv_yes_mark |
ad64d0ec | 5766 | = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]); |
e2e6a0f1 YO |
5767 | mark_state = st; |
5768 | ST.mark_loc = PL_reginput = locinput; | |
5769 | PUSH_YES_STATE_GOTO(MARKPOINT_next,next); | |
118e2215 | 5770 | assert(0); /* NOTREACHED */ |
e2e6a0f1 YO |
5771 | case MARKPOINT_next: |
5772 | mark_state = ST.prev_mark; | |
5773 | sayYES; | |
118e2215 | 5774 | assert(0); /* NOTREACHED */ |
e2e6a0f1 | 5775 | case MARKPOINT_next_fail: |
5d458dd8 | 5776 | if (popmark && sv_eq(ST.mark_name,popmark)) |
e2e6a0f1 YO |
5777 | { |
5778 | if (ST.mark_loc > startpoint) | |
5779 | reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1); | |
5780 | popmark = NULL; /* we found our mark */ | |
5781 | sv_commit = ST.mark_name; | |
5782 | ||
5783 | DEBUG_EXECUTE_r({ | |
5d458dd8 | 5784 | PerlIO_printf(Perl_debug_log, |
e2e6a0f1 YO |
5785 | "%*s %ssetting cutpoint to mark:%"SVf"...%s\n", |
5786 | REPORT_CODE_OFF+depth*2, "", | |
be2597df | 5787 | PL_colors[4], SVfARG(sv_commit), PL_colors[5]); |
e2e6a0f1 YO |
5788 | }); |
5789 | } | |
5790 | mark_state = ST.prev_mark; | |
5d458dd8 YO |
5791 | sv_yes_mark = mark_state ? |
5792 | mark_state->u.mark.mark_name : NULL; | |
e2e6a0f1 | 5793 | sayNO; |
118e2215 | 5794 | assert(0); /* NOTREACHED */ |
5d458dd8 YO |
5795 | case SKIP: |
5796 | PL_reginput = locinput; | |
5797 | if (scan->flags) { | |
2bf803e2 | 5798 | /* (*SKIP) : if we fail we cut here*/ |
5d458dd8 | 5799 | ST.mark_name = NULL; |
e2e6a0f1 | 5800 | ST.mark_loc = locinput; |
5d458dd8 YO |
5801 | PUSH_STATE_GOTO(SKIP_next,next); |
5802 | } else { | |
2bf803e2 | 5803 | /* (*SKIP:NAME) : if there is a (*MARK:NAME) fail where it was, |
5d458dd8 YO |
5804 | otherwise do nothing. Meaning we need to scan |
5805 | */ | |
5806 | regmatch_state *cur = mark_state; | |
ad64d0ec | 5807 | SV *find = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]); |
5d458dd8 YO |
5808 | |
5809 | while (cur) { | |
5810 | if ( sv_eq( cur->u.mark.mark_name, | |
5811 | find ) ) | |
5812 | { | |
5813 | ST.mark_name = find; | |
5814 | PUSH_STATE_GOTO( SKIP_next, next ); | |
5815 | } | |
5816 | cur = cur->u.mark.prev_mark; | |
5817 | } | |
e2e6a0f1 | 5818 | } |
2bf803e2 | 5819 | /* Didn't find our (*MARK:NAME) so ignore this (*SKIP:NAME) */ |
5d458dd8 YO |
5820 | break; |
5821 | case SKIP_next_fail: | |
5822 | if (ST.mark_name) { | |
5823 | /* (*CUT:NAME) - Set up to search for the name as we | |
5824 | collapse the stack*/ | |
5825 | popmark = ST.mark_name; | |
5826 | } else { | |
5827 | /* (*CUT) - No name, we cut here.*/ | |
e2e6a0f1 YO |
5828 | if (ST.mark_loc > startpoint) |
5829 | reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1); | |
5d458dd8 YO |
5830 | /* but we set sv_commit to latest mark_name if there |
5831 | is one so they can test to see how things lead to this | |
5832 | cut */ | |
5833 | if (mark_state) | |
5834 | sv_commit=mark_state->u.mark.mark_name; | |
5835 | } | |
e2e6a0f1 YO |
5836 | no_final = 1; |
5837 | sayNO; | |
118e2215 | 5838 | assert(0); /* NOTREACHED */ |
e2e6a0f1 | 5839 | #undef ST |
e1d1eefb | 5840 | case LNBREAK: |
f2ed9b32 | 5841 | if ((n=is_LNBREAK(locinput,utf8_target))) { |
e1d1eefb YO |
5842 | locinput += n; |
5843 | nextchr = UCHARAT(locinput); | |
5844 | } else | |
5845 | sayNO; | |
5846 | break; | |
5847 | ||
5848 | #define CASE_CLASS(nAmE) \ | |
5849 | case nAmE: \ | |
1380b51d DM |
5850 | if (locinput >= PL_regeol) \ |
5851 | sayNO; \ | |
f2ed9b32 | 5852 | if ((n=is_##nAmE(locinput,utf8_target))) { \ |
e1d1eefb YO |
5853 | locinput += n; \ |
5854 | nextchr = UCHARAT(locinput); \ | |
5855 | } else \ | |
5856 | sayNO; \ | |
5857 | break; \ | |
5858 | case N##nAmE: \ | |
1380b51d DM |
5859 | if (locinput >= PL_regeol) \ |
5860 | sayNO; \ | |
f2ed9b32 | 5861 | if ((n=is_##nAmE(locinput,utf8_target))) { \ |
e1d1eefb YO |
5862 | sayNO; \ |
5863 | } else { \ | |
5864 | locinput += UTF8SKIP(locinput); \ | |
5865 | nextchr = UCHARAT(locinput); \ | |
5866 | } \ | |
5867 | break | |
5868 | ||
5869 | CASE_CLASS(VERTWS); | |
5870 | CASE_CLASS(HORIZWS); | |
5871 | #undef CASE_CLASS | |
5872 | ||
a0d0e21e | 5873 | default: |
b900a521 | 5874 | PerlIO_printf(Perl_error_log, "%"UVxf" %d\n", |
d7d93a81 | 5875 | PTR2UV(scan), OP(scan)); |
cea2e8a9 | 5876 | Perl_croak(aTHX_ "regexp memory corruption"); |
5d458dd8 YO |
5877 | |
5878 | } /* end switch */ | |
95b24440 | 5879 | |
5d458dd8 YO |
5880 | /* switch break jumps here */ |
5881 | scan = next; /* prepare to execute the next op and ... */ | |
5882 | continue; /* ... jump back to the top, reusing st */ | |
118e2215 | 5883 | assert(0); /* NOTREACHED */ |
95b24440 | 5884 | |
40a82448 DM |
5885 | push_yes_state: |
5886 | /* push a state that backtracks on success */ | |
5887 | st->u.yes.prev_yes_state = yes_state; | |
5888 | yes_state = st; | |
5889 | /* FALL THROUGH */ | |
5890 | push_state: | |
5891 | /* push a new regex state, then continue at scan */ | |
5892 | { | |
5893 | regmatch_state *newst; | |
5894 | ||
24b23f37 YO |
5895 | DEBUG_STACK_r({ |
5896 | regmatch_state *cur = st; | |
5897 | regmatch_state *curyes = yes_state; | |
5898 | int curd = depth; | |
5899 | regmatch_slab *slab = PL_regmatch_slab; | |
5900 | for (;curd > -1;cur--,curd--) { | |
5901 | if (cur < SLAB_FIRST(slab)) { | |
5902 | slab = slab->prev; | |
5903 | cur = SLAB_LAST(slab); | |
5904 | } | |
5905 | PerlIO_printf(Perl_error_log, "%*s#%-3d %-10s %s\n", | |
5906 | REPORT_CODE_OFF + 2 + depth * 2,"", | |
13d6edb4 | 5907 | curd, PL_reg_name[cur->resume_state], |
24b23f37 YO |
5908 | (curyes == cur) ? "yes" : "" |
5909 | ); | |
5910 | if (curyes == cur) | |
5911 | curyes = cur->u.yes.prev_yes_state; | |
5912 | } | |
5913 | } else | |
5914 | DEBUG_STATE_pp("push") | |
5915 | ); | |
40a82448 | 5916 | depth++; |
40a82448 DM |
5917 | st->locinput = locinput; |
5918 | newst = st+1; | |
5919 | if (newst > SLAB_LAST(PL_regmatch_slab)) | |
5920 | newst = S_push_slab(aTHX); | |
5921 | PL_regmatch_state = newst; | |
786e8c11 | 5922 | |
40a82448 DM |
5923 | locinput = PL_reginput; |
5924 | nextchr = UCHARAT(locinput); | |
5925 | st = newst; | |
5926 | continue; | |
118e2215 | 5927 | assert(0); /* NOTREACHED */ |
40a82448 | 5928 | } |
a0d0e21e | 5929 | } |
a687059c | 5930 | |
a0d0e21e LW |
5931 | /* |
5932 | * We get here only if there's trouble -- normally "case END" is | |
5933 | * the terminating point. | |
5934 | */ | |
cea2e8a9 | 5935 | Perl_croak(aTHX_ "corrupted regexp pointers"); |
a0d0e21e | 5936 | /*NOTREACHED*/ |
4633a7c4 LW |
5937 | sayNO; |
5938 | ||
262b90c4 | 5939 | yes: |
77cb431f DM |
5940 | if (yes_state) { |
5941 | /* we have successfully completed a subexpression, but we must now | |
5942 | * pop to the state marked by yes_state and continue from there */ | |
77cb431f | 5943 | assert(st != yes_state); |
5bc10b2c DM |
5944 | #ifdef DEBUGGING |
5945 | while (st != yes_state) { | |
5946 | st--; | |
5947 | if (st < SLAB_FIRST(PL_regmatch_slab)) { | |
5948 | PL_regmatch_slab = PL_regmatch_slab->prev; | |
5949 | st = SLAB_LAST(PL_regmatch_slab); | |
5950 | } | |
e2e6a0f1 | 5951 | DEBUG_STATE_r({ |
54612592 YO |
5952 | if (no_final) { |
5953 | DEBUG_STATE_pp("pop (no final)"); | |
5954 | } else { | |
5955 | DEBUG_STATE_pp("pop (yes)"); | |
5956 | } | |
e2e6a0f1 | 5957 | }); |
5bc10b2c DM |
5958 | depth--; |
5959 | } | |
5960 | #else | |
77cb431f DM |
5961 | while (yes_state < SLAB_FIRST(PL_regmatch_slab) |
5962 | || yes_state > SLAB_LAST(PL_regmatch_slab)) | |
5963 | { | |
5964 | /* not in this slab, pop slab */ | |
5965 | depth -= (st - SLAB_FIRST(PL_regmatch_slab) + 1); | |
5966 | PL_regmatch_slab = PL_regmatch_slab->prev; | |
5967 | st = SLAB_LAST(PL_regmatch_slab); | |
5968 | } | |
5969 | depth -= (st - yes_state); | |
5bc10b2c | 5970 | #endif |
77cb431f DM |
5971 | st = yes_state; |
5972 | yes_state = st->u.yes.prev_yes_state; | |
5973 | PL_regmatch_state = st; | |
24b23f37 | 5974 | |
5d458dd8 YO |
5975 | if (no_final) { |
5976 | locinput= st->locinput; | |
5977 | nextchr = UCHARAT(locinput); | |
5978 | } | |
54612592 | 5979 | state_num = st->resume_state + no_final; |
24d3c4a9 | 5980 | goto reenter_switch; |
77cb431f DM |
5981 | } |
5982 | ||
a3621e74 | 5983 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n", |
e4584336 | 5984 | PL_colors[4], PL_colors[5])); |
02db2b7b | 5985 | |
ed301438 | 5986 | if (PL_reg_state.re_state_eval_setup_done) { |
19b95bf0 DM |
5987 | /* each successfully executed (?{...}) block does the equivalent of |
5988 | * local $^R = do {...} | |
5989 | * When popping the save stack, all these locals would be undone; | |
5990 | * bypass this by setting the outermost saved $^R to the latest | |
5991 | * value */ | |
5992 | if (oreplsv != GvSV(PL_replgv)) | |
5993 | sv_setsv(oreplsv, GvSV(PL_replgv)); | |
5994 | } | |
95b24440 | 5995 | result = 1; |
aa283a38 | 5996 | goto final_exit; |
4633a7c4 LW |
5997 | |
5998 | no: | |
a3621e74 | 5999 | DEBUG_EXECUTE_r( |
7821416a | 6000 | PerlIO_printf(Perl_debug_log, |
786e8c11 | 6001 | "%*s %sfailed...%s\n", |
5bc10b2c | 6002 | REPORT_CODE_OFF+depth*2, "", |
786e8c11 | 6003 | PL_colors[4], PL_colors[5]) |
7821416a | 6004 | ); |
aa283a38 | 6005 | |
262b90c4 | 6006 | no_silent: |
54612592 YO |
6007 | if (no_final) { |
6008 | if (yes_state) { | |
6009 | goto yes; | |
6010 | } else { | |
6011 | goto final_exit; | |
6012 | } | |
6013 | } | |
aa283a38 DM |
6014 | if (depth) { |
6015 | /* there's a previous state to backtrack to */ | |
40a82448 DM |
6016 | st--; |
6017 | if (st < SLAB_FIRST(PL_regmatch_slab)) { | |
6018 | PL_regmatch_slab = PL_regmatch_slab->prev; | |
6019 | st = SLAB_LAST(PL_regmatch_slab); | |
6020 | } | |
6021 | PL_regmatch_state = st; | |
40a82448 DM |
6022 | locinput= st->locinput; |
6023 | nextchr = UCHARAT(locinput); | |
6024 | ||
5bc10b2c DM |
6025 | DEBUG_STATE_pp("pop"); |
6026 | depth--; | |
262b90c4 DM |
6027 | if (yes_state == st) |
6028 | yes_state = st->u.yes.prev_yes_state; | |
5bc10b2c | 6029 | |
24d3c4a9 DM |
6030 | state_num = st->resume_state + 1; /* failure = success + 1 */ |
6031 | goto reenter_switch; | |
95b24440 | 6032 | } |
24d3c4a9 | 6033 | result = 0; |
aa283a38 | 6034 | |
262b90c4 | 6035 | final_exit: |
bbe252da | 6036 | if (rex->intflags & PREGf_VERBARG_SEEN) { |
5d458dd8 YO |
6037 | SV *sv_err = get_sv("REGERROR", 1); |
6038 | SV *sv_mrk = get_sv("REGMARK", 1); | |
6039 | if (result) { | |
e2e6a0f1 | 6040 | sv_commit = &PL_sv_no; |
5d458dd8 YO |
6041 | if (!sv_yes_mark) |
6042 | sv_yes_mark = &PL_sv_yes; | |
6043 | } else { | |
6044 | if (!sv_commit) | |
6045 | sv_commit = &PL_sv_yes; | |
6046 | sv_yes_mark = &PL_sv_no; | |
6047 | } | |
6048 | sv_setsv(sv_err, sv_commit); | |
6049 | sv_setsv(sv_mrk, sv_yes_mark); | |
e2e6a0f1 | 6050 | } |
19b95bf0 | 6051 | |
81ed78b2 DM |
6052 | |
6053 | if (last_pushed_cv) { | |
6054 | dSP; | |
6055 | POP_MULTICALL; | |
4f8dbb2d | 6056 | PERL_UNUSED_VAR(SP); |
81ed78b2 DM |
6057 | } |
6058 | ||
2f554ef7 DM |
6059 | /* clean up; in particular, free all slabs above current one */ |
6060 | LEAVE_SCOPE(oldsave); | |
5d9a96ca | 6061 | |
95b24440 | 6062 | return result; |
a687059c LW |
6063 | } |
6064 | ||
6065 | /* | |
6066 | - regrepeat - repeatedly match something simple, report how many | |
6067 | */ | |
6068 | /* | |
6069 | * [This routine now assumes that it will only match on things of length 1. | |
6070 | * That was true before, but now we assume scan - reginput is the count, | |
a0ed51b3 | 6071 | * rather than incrementing count on every character. [Er, except utf8.]] |
a687059c | 6072 | */ |
76e3520e | 6073 | STATIC I32 |
e2e6a0f1 | 6074 | S_regrepeat(pTHX_ const regexp *prog, const regnode *p, I32 max, int depth) |
a687059c | 6075 | { |
27da23d5 | 6076 | dVAR; |
eb578fdb KW |
6077 | char *scan; |
6078 | I32 c; | |
6079 | char *loceol = PL_regeol; | |
6080 | I32 hardcount = 0; | |
6081 | bool utf8_target = PL_reg_match_utf8; | |
d513472c | 6082 | UV utf8_flags; |
4f55667c SP |
6083 | #ifndef DEBUGGING |
6084 | PERL_UNUSED_ARG(depth); | |
6085 | #endif | |
a0d0e21e | 6086 | |
7918f24d NC |
6087 | PERL_ARGS_ASSERT_REGREPEAT; |
6088 | ||
3280af22 | 6089 | scan = PL_reginput; |
faf11cac HS |
6090 | if (max == REG_INFTY) |
6091 | max = I32_MAX; | |
6092 | else if (max < loceol - scan) | |
7f596f4c | 6093 | loceol = scan + max; |
a0d0e21e | 6094 | switch (OP(p)) { |
22c35a8c | 6095 | case REG_ANY: |
f2ed9b32 | 6096 | if (utf8_target) { |
ffc61ed2 | 6097 | loceol = PL_regeol; |
1aa99e6b | 6098 | while (scan < loceol && hardcount < max && *scan != '\n') { |
ffc61ed2 JH |
6099 | scan += UTF8SKIP(scan); |
6100 | hardcount++; | |
6101 | } | |
6102 | } else { | |
6103 | while (scan < loceol && *scan != '\n') | |
6104 | scan++; | |
a0ed51b3 LW |
6105 | } |
6106 | break; | |
ffc61ed2 | 6107 | case SANY: |
f2ed9b32 | 6108 | if (utf8_target) { |
def8e4ea | 6109 | loceol = PL_regeol; |
a0804c9e | 6110 | while (scan < loceol && hardcount < max) { |
def8e4ea JH |
6111 | scan += UTF8SKIP(scan); |
6112 | hardcount++; | |
6113 | } | |
6114 | } | |
6115 | else | |
6116 | scan = loceol; | |
a0ed51b3 | 6117 | break; |
f33976b4 DB |
6118 | case CANY: |
6119 | scan = loceol; | |
6120 | break; | |
59d32103 KW |
6121 | case EXACT: |
6122 | /* To get here, EXACTish nodes must have *byte* length == 1. That | |
6123 | * means they match only characters in the string that can be expressed | |
6124 | * as a single byte. For non-utf8 strings, that means a simple match. | |
6125 | * For utf8 strings, the character matched must be an invariant, or | |
6126 | * downgradable to a single byte. The pattern's utf8ness is | |
6127 | * irrelevant, as since it's a single byte, it either isn't utf8, or if | |
6128 | * it is, it's an invariant */ | |
6129 | ||
6130 | c = (U8)*STRING(p); | |
6131 | assert(! UTF_PATTERN || UNI_IS_INVARIANT(c)); | |
6132 | ||
6133 | if (! utf8_target || UNI_IS_INVARIANT(c)) { | |
6134 | while (scan < loceol && UCHARAT(scan) == c) { | |
6135 | scan++; | |
6136 | } | |
6137 | } | |
6138 | else { | |
6139 | ||
6140 | /* Here, the string is utf8, and the pattern char is different | |
6141 | * in utf8 than not, so can't compare them directly. Outside the | |
5908807f | 6142 | * loop, find the two utf8 bytes that represent c, and then |
59d32103 KW |
6143 | * look for those in sequence in the utf8 string */ |
6144 | U8 high = UTF8_TWO_BYTE_HI(c); | |
6145 | U8 low = UTF8_TWO_BYTE_LO(c); | |
6146 | loceol = PL_regeol; | |
6147 | ||
6148 | while (hardcount < max | |
6149 | && scan + 1 < loceol | |
6150 | && UCHARAT(scan) == high | |
6151 | && UCHARAT(scan + 1) == low) | |
6152 | { | |
6153 | scan += 2; | |
6154 | hardcount++; | |
6155 | } | |
6156 | } | |
6157 | break; | |
2f7f8cb1 KW |
6158 | case EXACTFA: |
6159 | utf8_flags = FOLDEQ_UTF8_NOMIX_ASCII; | |
6160 | goto do_exactf; | |
6161 | ||
d4e0b827 KW |
6162 | case EXACTFL: |
6163 | PL_reg_flags |= RF_tainted; | |
17580e7a KW |
6164 | utf8_flags = FOLDEQ_UTF8_LOCALE; |
6165 | goto do_exactf; | |
6166 | ||
d4e0b827 | 6167 | case EXACTF: |
62bf7766 KW |
6168 | utf8_flags = 0; |
6169 | goto do_exactf; | |
6170 | ||
3c760661 | 6171 | case EXACTFU_SS: |
fab2782b | 6172 | case EXACTFU_TRICKYFOLD: |
9a5a5549 | 6173 | case EXACTFU: |
05f861a2 | 6174 | utf8_flags = (UTF_PATTERN) ? FOLDEQ_S2_ALREADY_FOLDED : 0; |
59d32103 | 6175 | |
2be3e190 KW |
6176 | /* The comments for the EXACT case above apply as well to these fold |
6177 | * ones */ | |
634c83a2 | 6178 | |
2f7f8cb1 | 6179 | do_exactf: |
090f7165 | 6180 | c = (U8)*STRING(p); |
634c83a2 | 6181 | assert(! UTF_PATTERN || UNI_IS_INVARIANT(c)); |
d4e0b827 | 6182 | |
3c760661 | 6183 | if (utf8_target || OP(p) == EXACTFU_SS) { /* Use full Unicode fold matching */ |
59d32103 KW |
6184 | char *tmpeol = loceol; |
6185 | while (hardcount < max | |
d513472c KW |
6186 | && foldEQ_utf8_flags(scan, &tmpeol, 0, utf8_target, |
6187 | STRING(p), NULL, 1, cBOOL(UTF_PATTERN), utf8_flags)) | |
59d32103 KW |
6188 | { |
6189 | scan = tmpeol; | |
6190 | tmpeol = loceol; | |
6191 | hardcount++; | |
6192 | } | |
634c83a2 | 6193 | |
59d32103 KW |
6194 | /* XXX Note that the above handles properly the German sharp s in |
6195 | * the pattern matching ss in the string. But it doesn't handle | |
6196 | * properly cases where the string contains say 'LIGATURE ff' and | |
6197 | * the pattern is 'f+'. This would require, say, a new function or | |
6198 | * revised interface to foldEQ_utf8(), in which the maximum number | |
6199 | * of characters to match could be passed and it would return how | |
6200 | * many actually did. This is just one of many cases where | |
6201 | * multi-char folds don't work properly, and so the fix is being | |
6202 | * deferred */ | |
6203 | } | |
6204 | else { | |
87381386 | 6205 | U8 folded; |
59d32103 | 6206 | |
2be3e190 KW |
6207 | /* Here, the string isn't utf8 and c is a single byte; and either |
6208 | * the pattern isn't utf8 or c is an invariant, so its utf8ness | |
6209 | * doesn't affect c. Can just do simple comparisons for exact or | |
6210 | * fold matching. */ | |
d4e0b827 | 6211 | switch (OP(p)) { |
87381386 | 6212 | case EXACTF: folded = PL_fold[c]; break; |
2f7f8cb1 | 6213 | case EXACTFA: |
fab2782b | 6214 | case EXACTFU_TRICKYFOLD: |
9a5a5549 | 6215 | case EXACTFU: folded = PL_fold_latin1[c]; break; |
87381386 KW |
6216 | case EXACTFL: folded = PL_fold_locale[c]; break; |
6217 | default: Perl_croak(aTHX_ "panic: Unexpected op %u", OP(p)); | |
6218 | } | |
6219 | while (scan < loceol && | |
6220 | (UCHARAT(scan) == c || UCHARAT(scan) == folded)) | |
6221 | { | |
6222 | scan++; | |
634c83a2 KW |
6223 | } |
6224 | } | |
bbce6d69 | 6225 | break; |
f56b6394 | 6226 | case ANYOFV: |
a0d0e21e | 6227 | case ANYOF: |
4e8910e0 KW |
6228 | if (utf8_target || OP(p) == ANYOFV) { |
6229 | STRLEN inclasslen; | |
ffc61ed2 | 6230 | loceol = PL_regeol; |
4e8910e0 KW |
6231 | inclasslen = loceol - scan; |
6232 | while (hardcount < max | |
6233 | && ((inclasslen = loceol - scan) > 0) | |
6234 | && reginclass(prog, p, (U8*)scan, &inclasslen, utf8_target)) | |
6235 | { | |
6236 | scan += inclasslen; | |
ffc61ed2 JH |
6237 | hardcount++; |
6238 | } | |
6239 | } else { | |
32fc9b6a | 6240 | while (scan < loceol && REGINCLASS(prog, p, (U8*)scan)) |
ffc61ed2 JH |
6241 | scan++; |
6242 | } | |
a0d0e21e | 6243 | break; |
980866de | 6244 | case ALNUMU: |
f2ed9b32 | 6245 | if (utf8_target) { |
980866de | 6246 | utf8_wordchar: |
ffc61ed2 | 6247 | loceol = PL_regeol; |
1a4fad37 | 6248 | LOAD_UTF8_CHARCLASS_ALNUM(); |
1aa99e6b | 6249 | while (hardcount < max && scan < loceol && |
a12cf05f KW |
6250 | swash_fetch(PL_utf8_alnum, (U8*)scan, utf8_target)) |
6251 | { | |
ffc61ed2 JH |
6252 | scan += UTF8SKIP(scan); |
6253 | hardcount++; | |
6254 | } | |
980866de | 6255 | } else { |
a12cf05f KW |
6256 | while (scan < loceol && isWORDCHAR_L1((U8) *scan)) { |
6257 | scan++; | |
6258 | } | |
980866de KW |
6259 | } |
6260 | break; | |
6261 | case ALNUM: | |
6262 | if (utf8_target) | |
6263 | goto utf8_wordchar; | |
6264 | while (scan < loceol && isALNUM((U8) *scan)) { | |
6265 | scan++; | |
a0ed51b3 LW |
6266 | } |
6267 | break; | |
cfaf538b KW |
6268 | case ALNUMA: |
6269 | while (scan < loceol && isWORDCHAR_A((U8) *scan)) { | |
6270 | scan++; | |
6271 | } | |
6272 | break; | |
bbce6d69 | 6273 | case ALNUML: |
3280af22 | 6274 | PL_reg_flags |= RF_tainted; |
f2ed9b32 | 6275 | if (utf8_target) { |
ffc61ed2 | 6276 | loceol = PL_regeol; |
1aa99e6b IH |
6277 | while (hardcount < max && scan < loceol && |
6278 | isALNUM_LC_utf8((U8*)scan)) { | |
ffc61ed2 JH |
6279 | scan += UTF8SKIP(scan); |
6280 | hardcount++; | |
6281 | } | |
6282 | } else { | |
6283 | while (scan < loceol && isALNUM_LC(*scan)) | |
6284 | scan++; | |
a0ed51b3 LW |
6285 | } |
6286 | break; | |
980866de | 6287 | case NALNUMU: |
f2ed9b32 | 6288 | if (utf8_target) { |
980866de KW |
6289 | |
6290 | utf8_Nwordchar: | |
6291 | ||
ffc61ed2 | 6292 | loceol = PL_regeol; |
1a4fad37 | 6293 | LOAD_UTF8_CHARCLASS_ALNUM(); |
1aa99e6b | 6294 | while (hardcount < max && scan < loceol && |
980866de | 6295 | ! swash_fetch(PL_utf8_alnum, (U8*)scan, utf8_target)) |
a12cf05f | 6296 | { |
ffc61ed2 JH |
6297 | scan += UTF8SKIP(scan); |
6298 | hardcount++; | |
6299 | } | |
980866de | 6300 | } else { |
a12cf05f KW |
6301 | while (scan < loceol && ! isWORDCHAR_L1((U8) *scan)) { |
6302 | scan++; | |
6303 | } | |
980866de KW |
6304 | } |
6305 | break; | |
6306 | case NALNUM: | |
6307 | if (utf8_target) | |
6308 | goto utf8_Nwordchar; | |
6309 | while (scan < loceol && ! isALNUM((U8) *scan)) { | |
6310 | scan++; | |
a0ed51b3 LW |
6311 | } |
6312 | break; | |
0658cdde KW |
6313 | |
6314 | case POSIXA: | |
6315 | while (scan < loceol && _generic_isCC_A((U8) *scan, FLAGS(p))) { | |
6316 | scan++; | |
6317 | } | |
6318 | break; | |
6319 | case NPOSIXA: | |
6320 | if (utf8_target) { | |
6321 | while (scan < loceol && ! _generic_isCC_A((U8) *scan, FLAGS(p))) { | |
6322 | scan += UTF8SKIP(scan); | |
6323 | } | |
6324 | } | |
6325 | else { | |
6326 | while (scan < loceol && ! _generic_isCC_A((U8) *scan, FLAGS(p))) { | |
6327 | scan++; | |
6328 | } | |
6329 | } | |
6330 | break; | |
cfaf538b KW |
6331 | case NALNUMA: |
6332 | if (utf8_target) { | |
6333 | while (scan < loceol && ! isWORDCHAR_A((U8) *scan)) { | |
6334 | scan += UTF8SKIP(scan); | |
6335 | } | |
6336 | } | |
6337 | else { | |
6338 | while (scan < loceol && ! isWORDCHAR_A((U8) *scan)) { | |
6339 | scan++; | |
6340 | } | |
6341 | } | |
6342 | break; | |
bbce6d69 | 6343 | case NALNUML: |
3280af22 | 6344 | PL_reg_flags |= RF_tainted; |
f2ed9b32 | 6345 | if (utf8_target) { |
ffc61ed2 | 6346 | loceol = PL_regeol; |
1aa99e6b IH |
6347 | while (hardcount < max && scan < loceol && |
6348 | !isALNUM_LC_utf8((U8*)scan)) { | |
ffc61ed2 JH |
6349 | scan += UTF8SKIP(scan); |
6350 | hardcount++; | |
6351 | } | |
6352 | } else { | |
6353 | while (scan < loceol && !isALNUM_LC(*scan)) | |
6354 | scan++; | |
a0ed51b3 LW |
6355 | } |
6356 | break; | |
980866de | 6357 | case SPACEU: |
f2ed9b32 | 6358 | if (utf8_target) { |
980866de KW |
6359 | |
6360 | utf8_space: | |
6361 | ||
ffc61ed2 | 6362 | loceol = PL_regeol; |
1a4fad37 | 6363 | LOAD_UTF8_CHARCLASS_SPACE(); |
1aa99e6b | 6364 | while (hardcount < max && scan < loceol && |
3568d838 | 6365 | (*scan == ' ' || |
a12cf05f KW |
6366 | swash_fetch(PL_utf8_space,(U8*)scan, utf8_target))) |
6367 | { | |
ffc61ed2 JH |
6368 | scan += UTF8SKIP(scan); |
6369 | hardcount++; | |
6370 | } | |
980866de KW |
6371 | break; |
6372 | } | |
6373 | else { | |
a12cf05f KW |
6374 | while (scan < loceol && isSPACE_L1((U8) *scan)) { |
6375 | scan++; | |
6376 | } | |
980866de KW |
6377 | break; |
6378 | } | |
6379 | case SPACE: | |
6380 | if (utf8_target) | |
6381 | goto utf8_space; | |
6382 | ||
6383 | while (scan < loceol && isSPACE((U8) *scan)) { | |
6384 | scan++; | |
a0ed51b3 LW |
6385 | } |
6386 | break; | |
cfaf538b KW |
6387 | case SPACEA: |
6388 | while (scan < loceol && isSPACE_A((U8) *scan)) { | |
6389 | scan++; | |
6390 | } | |
6391 | break; | |
bbce6d69 | 6392 | case SPACEL: |
3280af22 | 6393 | PL_reg_flags |= RF_tainted; |
f2ed9b32 | 6394 | if (utf8_target) { |
ffc61ed2 | 6395 | loceol = PL_regeol; |
1aa99e6b | 6396 | while (hardcount < max && scan < loceol && |
6bbba904 | 6397 | isSPACE_LC_utf8((U8*)scan)) { |
ffc61ed2 JH |
6398 | scan += UTF8SKIP(scan); |
6399 | hardcount++; | |
6400 | } | |
6401 | } else { | |
6402 | while (scan < loceol && isSPACE_LC(*scan)) | |
6403 | scan++; | |
a0ed51b3 LW |
6404 | } |
6405 | break; | |
980866de | 6406 | case NSPACEU: |
f2ed9b32 | 6407 | if (utf8_target) { |
980866de KW |
6408 | |
6409 | utf8_Nspace: | |
6410 | ||
ffc61ed2 | 6411 | loceol = PL_regeol; |
1a4fad37 | 6412 | LOAD_UTF8_CHARCLASS_SPACE(); |
1aa99e6b | 6413 | while (hardcount < max && scan < loceol && |
980866de KW |
6414 | ! (*scan == ' ' || |
6415 | swash_fetch(PL_utf8_space,(U8*)scan, utf8_target))) | |
a12cf05f | 6416 | { |
ffc61ed2 JH |
6417 | scan += UTF8SKIP(scan); |
6418 | hardcount++; | |
6419 | } | |
980866de KW |
6420 | break; |
6421 | } | |
6422 | else { | |
a12cf05f KW |
6423 | while (scan < loceol && ! isSPACE_L1((U8) *scan)) { |
6424 | scan++; | |
6425 | } | |
980866de KW |
6426 | } |
6427 | break; | |
6428 | case NSPACE: | |
6429 | if (utf8_target) | |
6430 | goto utf8_Nspace; | |
6431 | ||
6432 | while (scan < loceol && ! isSPACE((U8) *scan)) { | |
6433 | scan++; | |
a0ed51b3 | 6434 | } |
0008a298 | 6435 | break; |
cfaf538b KW |
6436 | case NSPACEA: |
6437 | if (utf8_target) { | |
6438 | while (scan < loceol && ! isSPACE_A((U8) *scan)) { | |
6439 | scan += UTF8SKIP(scan); | |
6440 | } | |
6441 | } | |
6442 | else { | |
6443 | while (scan < loceol && ! isSPACE_A((U8) *scan)) { | |
6444 | scan++; | |
6445 | } | |
6446 | } | |
6447 | break; | |
bbce6d69 | 6448 | case NSPACEL: |
3280af22 | 6449 | PL_reg_flags |= RF_tainted; |
f2ed9b32 | 6450 | if (utf8_target) { |
ffc61ed2 | 6451 | loceol = PL_regeol; |
1aa99e6b | 6452 | while (hardcount < max && scan < loceol && |
6bbba904 | 6453 | !isSPACE_LC_utf8((U8*)scan)) { |
ffc61ed2 JH |
6454 | scan += UTF8SKIP(scan); |
6455 | hardcount++; | |
6456 | } | |
6457 | } else { | |
6458 | while (scan < loceol && !isSPACE_LC(*scan)) | |
6459 | scan++; | |
a0ed51b3 LW |
6460 | } |
6461 | break; | |
a0d0e21e | 6462 | case DIGIT: |
f2ed9b32 | 6463 | if (utf8_target) { |
ffc61ed2 | 6464 | loceol = PL_regeol; |
1a4fad37 | 6465 | LOAD_UTF8_CHARCLASS_DIGIT(); |
1aa99e6b | 6466 | while (hardcount < max && scan < loceol && |
f2ed9b32 | 6467 | swash_fetch(PL_utf8_digit, (U8*)scan, utf8_target)) { |
ffc61ed2 JH |
6468 | scan += UTF8SKIP(scan); |
6469 | hardcount++; | |
6470 | } | |
6471 | } else { | |
6472 | while (scan < loceol && isDIGIT(*scan)) | |
6473 | scan++; | |
a0ed51b3 LW |
6474 | } |
6475 | break; | |
cfaf538b KW |
6476 | case DIGITA: |
6477 | while (scan < loceol && isDIGIT_A((U8) *scan)) { | |
6478 | scan++; | |
6479 | } | |
6480 | break; | |
b77393f6 KW |
6481 | case DIGITL: |
6482 | PL_reg_flags |= RF_tainted; | |
6483 | if (utf8_target) { | |
6484 | loceol = PL_regeol; | |
6485 | while (hardcount < max && scan < loceol && | |
6486 | isDIGIT_LC_utf8((U8*)scan)) { | |
6487 | scan += UTF8SKIP(scan); | |
6488 | hardcount++; | |
6489 | } | |
6490 | } else { | |
6491 | while (scan < loceol && isDIGIT_LC(*scan)) | |
6492 | scan++; | |
6493 | } | |
6494 | break; | |
a0d0e21e | 6495 | case NDIGIT: |
f2ed9b32 | 6496 | if (utf8_target) { |
ffc61ed2 | 6497 | loceol = PL_regeol; |
1a4fad37 | 6498 | LOAD_UTF8_CHARCLASS_DIGIT(); |
1aa99e6b | 6499 | while (hardcount < max && scan < loceol && |
f2ed9b32 | 6500 | !swash_fetch(PL_utf8_digit, (U8*)scan, utf8_target)) { |
ffc61ed2 JH |
6501 | scan += UTF8SKIP(scan); |
6502 | hardcount++; | |
6503 | } | |
6504 | } else { | |
6505 | while (scan < loceol && !isDIGIT(*scan)) | |
6506 | scan++; | |
a0ed51b3 | 6507 | } |
cfaf538b KW |
6508 | break; |
6509 | case NDIGITA: | |
6510 | if (utf8_target) { | |
6511 | while (scan < loceol && ! isDIGIT_A((U8) *scan)) { | |
6512 | scan += UTF8SKIP(scan); | |
6513 | } | |
6514 | } | |
6515 | else { | |
6516 | while (scan < loceol && ! isDIGIT_A((U8) *scan)) { | |
6517 | scan++; | |
6518 | } | |
6519 | } | |
6520 | break; | |
b77393f6 KW |
6521 | case NDIGITL: |
6522 | PL_reg_flags |= RF_tainted; | |
6523 | if (utf8_target) { | |
6524 | loceol = PL_regeol; | |
6525 | while (hardcount < max && scan < loceol && | |
6526 | !isDIGIT_LC_utf8((U8*)scan)) { | |
6527 | scan += UTF8SKIP(scan); | |
6528 | hardcount++; | |
6529 | } | |
6530 | } else { | |
6531 | while (scan < loceol && !isDIGIT_LC(*scan)) | |
6532 | scan++; | |
6533 | } | |
6534 | break; | |
e1d1eefb | 6535 | case LNBREAK: |
f2ed9b32 | 6536 | if (utf8_target) { |
e1d1eefb YO |
6537 | loceol = PL_regeol; |
6538 | while (hardcount < max && scan < loceol && (c=is_LNBREAK_utf8(scan))) { | |
6539 | scan += c; | |
6540 | hardcount++; | |
6541 | } | |
6542 | } else { | |
6543 | /* | |
6544 | LNBREAK can match two latin chars, which is ok, | |
6545 | because we have a null terminated string, but we | |
6546 | have to use hardcount in this situation | |
6547 | */ | |
6548 | while (scan < loceol && (c=is_LNBREAK_latin1(scan))) { | |
6549 | scan+=c; | |
6550 | hardcount++; | |
6551 | } | |
6552 | } | |
6553 | break; | |
6554 | case HORIZWS: | |
f2ed9b32 | 6555 | if (utf8_target) { |
e1d1eefb YO |
6556 | loceol = PL_regeol; |
6557 | while (hardcount < max && scan < loceol && (c=is_HORIZWS_utf8(scan))) { | |
6558 | scan += c; | |
6559 | hardcount++; | |
6560 | } | |
6561 | } else { | |
6562 | while (scan < loceol && is_HORIZWS_latin1(scan)) | |
6563 | scan++; | |
6564 | } | |
a0ed51b3 | 6565 | break; |
e1d1eefb | 6566 | case NHORIZWS: |
f2ed9b32 | 6567 | if (utf8_target) { |
e1d1eefb YO |
6568 | loceol = PL_regeol; |
6569 | while (hardcount < max && scan < loceol && !is_HORIZWS_utf8(scan)) { | |
6570 | scan += UTF8SKIP(scan); | |
6571 | hardcount++; | |
6572 | } | |
6573 | } else { | |
6574 | while (scan < loceol && !is_HORIZWS_latin1(scan)) | |
6575 | scan++; | |
6576 | ||
6577 | } | |
6578 | break; | |
6579 | case VERTWS: | |
f2ed9b32 | 6580 | if (utf8_target) { |
e1d1eefb YO |
6581 | loceol = PL_regeol; |
6582 | while (hardcount < max && scan < loceol && (c=is_VERTWS_utf8(scan))) { | |
6583 | scan += c; | |
6584 | hardcount++; | |
6585 | } | |
6586 | } else { | |
6587 | while (scan < loceol && is_VERTWS_latin1(scan)) | |
6588 | scan++; | |
6589 | ||
6590 | } | |
6591 | break; | |
6592 | case NVERTWS: | |
f2ed9b32 | 6593 | if (utf8_target) { |
e1d1eefb YO |
6594 | loceol = PL_regeol; |
6595 | while (hardcount < max && scan < loceol && !is_VERTWS_utf8(scan)) { | |
6596 | scan += UTF8SKIP(scan); | |
6597 | hardcount++; | |
6598 | } | |
6599 | } else { | |
6600 | while (scan < loceol && !is_VERTWS_latin1(scan)) | |
6601 | scan++; | |
6602 | ||
6603 | } | |
6604 | break; | |
6605 | ||
a0d0e21e LW |
6606 | default: /* Called on something of 0 width. */ |
6607 | break; /* So match right here or not at all. */ | |
6608 | } | |
a687059c | 6609 | |
a0ed51b3 LW |
6610 | if (hardcount) |
6611 | c = hardcount; | |
6612 | else | |
6613 | c = scan - PL_reginput; | |
3280af22 | 6614 | PL_reginput = scan; |
a687059c | 6615 | |
a3621e74 | 6616 | DEBUG_r({ |
e68ec53f | 6617 | GET_RE_DEBUG_FLAGS_DECL; |
be8e71aa | 6618 | DEBUG_EXECUTE_r({ |
e68ec53f YO |
6619 | SV * const prop = sv_newmortal(); |
6620 | regprop(prog, prop, p); | |
6621 | PerlIO_printf(Perl_debug_log, | |
be8e71aa | 6622 | "%*s %s can match %"IVdf" times out of %"IVdf"...\n", |
e2e6a0f1 | 6623 | REPORT_CODE_OFF + depth*2, "", SvPVX_const(prop),(IV)c,(IV)max); |
a3621e74 | 6624 | }); |
be8e71aa | 6625 | }); |
9041c2e3 | 6626 | |
a0d0e21e | 6627 | return(c); |
a687059c LW |
6628 | } |
6629 | ||
c277df42 | 6630 | |
be8e71aa | 6631 | #if !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION) |
c277df42 | 6632 | /* |
6c6525b8 KW |
6633 | - regclass_swash - prepare the utf8 swash. Wraps the shared core version to |
6634 | create a copy so that changes the caller makes won't change the shared one | |
6635 | */ | |
ffc61ed2 | 6636 | SV * |
32fc9b6a | 6637 | Perl_regclass_swash(pTHX_ const regexp *prog, register const regnode* node, bool doinit, SV** listsvp, SV **altsvp) |
ffc61ed2 | 6638 | { |
6c6525b8 KW |
6639 | PERL_ARGS_ASSERT_REGCLASS_SWASH; |
6640 | return newSVsv(core_regclass_swash(prog, node, doinit, listsvp, altsvp)); | |
6641 | } | |
6642 | #endif | |
6643 | ||
6644 | STATIC SV * | |
6645 | S_core_regclass_swash(pTHX_ const regexp *prog, register const regnode* node, bool doinit, SV** listsvp, SV **altsvp) | |
6646 | { | |
8c9eb58f KW |
6647 | /* Returns the swash for the input 'node' in the regex 'prog'. |
6648 | * If <doinit> is true, will attempt to create the swash if not already | |
6649 | * done. | |
6650 | * If <listsvp> is non-null, will return the swash initialization string in | |
6651 | * it. | |
6652 | * If <altsvp> is non-null, will return the alternates to the regular swash | |
6653 | * in it | |
6654 | * Tied intimately to how regcomp.c sets up the data structure */ | |
6655 | ||
97aff369 | 6656 | dVAR; |
9e55ce06 JH |
6657 | SV *sw = NULL; |
6658 | SV *si = NULL; | |
6659 | SV *alt = NULL; | |
7a6c6baa KW |
6660 | SV* invlist = NULL; |
6661 | ||
f8fc2ecf YO |
6662 | RXi_GET_DECL(prog,progi); |
6663 | const struct reg_data * const data = prog ? progi->data : NULL; | |
ffc61ed2 | 6664 | |
6c6525b8 | 6665 | PERL_ARGS_ASSERT_CORE_REGCLASS_SWASH; |
7918f24d | 6666 | |
ccb2541c KW |
6667 | assert(ANYOF_NONBITMAP(node)); |
6668 | ||
4f639d21 | 6669 | if (data && data->count) { |
a3b680e6 | 6670 | const U32 n = ARG(node); |
ffc61ed2 | 6671 | |
4f639d21 | 6672 | if (data->what[n] == 's') { |
ad64d0ec NC |
6673 | SV * const rv = MUTABLE_SV(data->data[n]); |
6674 | AV * const av = MUTABLE_AV(SvRV(rv)); | |
2d03de9c | 6675 | SV **const ary = AvARRAY(av); |
87367d5f | 6676 | U8 swash_init_flags = _CORE_SWASH_INIT_ACCEPT_INVLIST; |
9041c2e3 | 6677 | |
8c9eb58f | 6678 | si = *ary; /* ary[0] = the string to initialize the swash with */ |
b11f357e | 6679 | |
7a6c6baa KW |
6680 | /* Elements 3 and 4 are either both present or both absent. [3] is |
6681 | * any inversion list generated at compile time; [4] indicates if | |
6682 | * that inversion list has any user-defined properties in it. */ | |
6683 | if (av_len(av) >= 3) { | |
6684 | invlist = ary[3]; | |
83199d38 KW |
6685 | if (SvUV(ary[4])) { |
6686 | swash_init_flags |= _CORE_SWASH_INIT_USER_DEFINED_PROPERTY; | |
6687 | } | |
7a6c6baa KW |
6688 | } |
6689 | else { | |
6690 | invlist = NULL; | |
7a6c6baa KW |
6691 | } |
6692 | ||
8c9eb58f KW |
6693 | /* Element [1] is reserved for the set-up swash. If already there, |
6694 | * return it; if not, create it and store it there */ | |
f192cf32 KW |
6695 | if (SvROK(ary[1])) { |
6696 | sw = ary[1]; | |
6697 | } | |
ffc61ed2 | 6698 | else if (si && doinit) { |
7a6c6baa KW |
6699 | |
6700 | sw = _core_swash_init("utf8", /* the utf8 package */ | |
6701 | "", /* nameless */ | |
6702 | si, | |
6703 | 1, /* binary */ | |
6704 | 0, /* not from tr/// */ | |
7a6c6baa | 6705 | invlist, |
83199d38 | 6706 | &swash_init_flags); |
ffc61ed2 JH |
6707 | (void)av_store(av, 1, sw); |
6708 | } | |
8c9eb58f KW |
6709 | |
6710 | /* Element [2] is for any multi-char folds. Note that is a | |
6711 | * fundamentally flawed design, because can't backtrack and try | |
6712 | * again. See [perl #89774] */ | |
f192cf32 KW |
6713 | if (SvTYPE(ary[2]) == SVt_PVAV) { |
6714 | alt = ary[2]; | |
6715 | } | |
ffc61ed2 JH |
6716 | } |
6717 | } | |
6718 | ||
7a6c6baa KW |
6719 | if (listsvp) { |
6720 | SV* matches_string = newSVpvn("", 0); | |
7a6c6baa KW |
6721 | |
6722 | /* Use the swash, if any, which has to have incorporated into it all | |
6723 | * possibilities */ | |
872dd7e0 KW |
6724 | if ((! sw || (invlist = _get_swash_invlist(sw)) == NULL) |
6725 | && (si && si != &PL_sv_undef)) | |
6726 | { | |
7a6c6baa | 6727 | |
872dd7e0 | 6728 | /* If no swash, use the input initialization string, if available */ |
7a6c6baa KW |
6729 | sv_catsv(matches_string, si); |
6730 | } | |
6731 | ||
6732 | /* Add the inversion list to whatever we have. This may have come from | |
6733 | * the swash, or from an input parameter */ | |
6734 | if (invlist) { | |
6735 | sv_catsv(matches_string, _invlist_contents(invlist)); | |
6736 | } | |
6737 | *listsvp = matches_string; | |
6738 | } | |
6739 | ||
9e55ce06 JH |
6740 | if (altsvp) |
6741 | *altsvp = alt; | |
ffc61ed2 JH |
6742 | |
6743 | return sw; | |
6744 | } | |
6745 | ||
6746 | /* | |
ba7b4546 | 6747 | - reginclass - determine if a character falls into a character class |
832705d4 | 6748 | |
6698fab5 KW |
6749 | n is the ANYOF regnode |
6750 | p is the target string | |
6751 | lenp is pointer to the maximum number of bytes of how far to go in p | |
6752 | (This is assumed wthout checking to always be at least the current | |
6753 | character's size) | |
6754 | utf8_target tells whether p is in UTF-8. | |
832705d4 | 6755 | |
4b3cda86 KW |
6756 | Returns true if matched; false otherwise. If lenp is not NULL, on return |
6757 | from a successful match, the value it points to will be updated to how many | |
6758 | bytes in p were matched. If there was no match, the value is undefined, | |
6759 | possibly changed from the input. | |
eba1359e | 6760 | |
d5788240 KW |
6761 | Note that this can be a synthetic start class, a combination of various |
6762 | nodes, so things you think might be mutually exclusive, such as locale, | |
6763 | aren't. It can match both locale and non-locale | |
6764 | ||
bbce6d69 | 6765 | */ |
6766 | ||
76e3520e | 6767 | STATIC bool |
f6ad78d8 | 6768 | S_reginclass(pTHX_ const regexp * const prog, register const regnode * const n, register const U8* const p, STRLEN* lenp, register const bool utf8_target) |
bbce6d69 | 6769 | { |
27da23d5 | 6770 | dVAR; |
a3b680e6 | 6771 | const char flags = ANYOF_FLAGS(n); |
bbce6d69 | 6772 | bool match = FALSE; |
cc07378b | 6773 | UV c = *p; |
f7ab54c6 | 6774 | STRLEN c_len = 0; |
6698fab5 | 6775 | STRLEN maxlen; |
1aa99e6b | 6776 | |
7918f24d NC |
6777 | PERL_ARGS_ASSERT_REGINCLASS; |
6778 | ||
4b3cda86 | 6779 | /* If c is not already the code point, get it */ |
f2ed9b32 | 6780 | if (utf8_target && !UTF8_IS_INVARIANT(c)) { |
f7ab54c6 | 6781 | c = utf8n_to_uvchr(p, UTF8_MAXBYTES, &c_len, |
6182169b KW |
6782 | (UTF8_ALLOW_DEFAULT & UTF8_ALLOW_ANYUV) |
6783 | | UTF8_ALLOW_FFFF | UTF8_CHECK_ONLY); | |
6784 | /* see [perl #37836] for UTF8_ALLOW_ANYUV; [perl #38293] for | |
6785 | * UTF8_ALLOW_FFFF */ | |
f7ab54c6 | 6786 | if (c_len == (STRLEN)-1) |
e8a70c6f | 6787 | Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)"); |
19f67299 | 6788 | } |
a5a291f5 KW |
6789 | else { |
6790 | c_len = 1; | |
6791 | } | |
bbce6d69 | 6792 | |
a5a291f5 KW |
6793 | /* Use passed in max length, or one character if none passed in or less |
6794 | * than one character. And assume will match just one character. This is | |
6795 | * overwritten later if matched more. */ | |
4b3cda86 | 6796 | if (lenp) { |
a5a291f5 KW |
6797 | maxlen = (*lenp > c_len) ? *lenp : c_len; |
6798 | *lenp = c_len; | |
4b3cda86 KW |
6799 | |
6800 | } | |
6801 | else { | |
a5a291f5 | 6802 | maxlen = c_len; |
4b3cda86 KW |
6803 | } |
6804 | ||
7cdde544 KW |
6805 | /* If this character is potentially in the bitmap, check it */ |
6806 | if (c < 256) { | |
ffc61ed2 JH |
6807 | if (ANYOF_BITMAP_TEST(n, c)) |
6808 | match = TRUE; | |
11454c59 KW |
6809 | else if (flags & ANYOF_NON_UTF8_LATIN1_ALL |
6810 | && ! utf8_target | |
6811 | && ! isASCII(c)) | |
6812 | { | |
6813 | match = TRUE; | |
6814 | } | |
a0ed51b3 | 6815 | |
78969a98 KW |
6816 | else if (flags & ANYOF_LOCALE) { |
6817 | PL_reg_flags |= RF_tainted; | |
6818 | ||
6819 | if ((flags & ANYOF_LOC_NONBITMAP_FOLD) | |
6820 | && ANYOF_BITMAP_TEST(n, PL_fold_locale[c])) | |
6821 | { | |
ffc61ed2 | 6822 | match = TRUE; |
78969a98 | 6823 | } |
040aea3a KW |
6824 | else if (ANYOF_CLASS_TEST_ANY_SET(n) && |
6825 | ((ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) || | |
6826 | (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) || | |
6827 | (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) || | |
6828 | (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) || | |
6829 | (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) || | |
6830 | (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) || | |
6831 | (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) || | |
6832 | (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) || | |
6833 | (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) || | |
6834 | (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) || | |
07315176 KW |
6835 | (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII_LC(c)) || |
6836 | (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII_LC(c)) || | |
040aea3a KW |
6837 | (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) || |
6838 | (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) || | |
6839 | (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) || | |
6840 | (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) || | |
6841 | (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) || | |
6842 | (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) || | |
6843 | (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) || | |
6844 | (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) || | |
6845 | (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) || | |
6846 | (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) || | |
6847 | (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) || | |
6848 | (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) || | |
6849 | (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) || | |
6850 | (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) || | |
6851 | (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) || | |
6852 | (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) || | |
67addccf KW |
6853 | (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK_LC(c)) || |
6854 | (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK_LC(c)) | |
040aea3a | 6855 | ) /* How's that for a conditional? */ |
78969a98 | 6856 | ) { |
ffc61ed2 JH |
6857 | match = TRUE; |
6858 | } | |
a0ed51b3 | 6859 | } |
a0ed51b3 LW |
6860 | } |
6861 | ||
7cdde544 | 6862 | /* If the bitmap didn't (or couldn't) match, and something outside the |
de87c4fe KW |
6863 | * bitmap could match, try that. Locale nodes specifiy completely the |
6864 | * behavior of code points in the bit map (otherwise, a utf8 target would | |
c613755a | 6865 | * cause them to be treated as Unicode and not locale), except in |
de87c4fe | 6866 | * the very unlikely event when this node is a synthetic start class, which |
c613755a KW |
6867 | * could be a combination of locale and non-locale nodes. So allow locale |
6868 | * to match for the synthetic start class, which will give a false | |
6869 | * positive that will be resolved when the match is done again as not part | |
6870 | * of the synthetic start class */ | |
ef87b810 | 6871 | if (!match) { |
10ee90d2 KW |
6872 | if (utf8_target && (flags & ANYOF_UNICODE_ALL) && c >= 256) { |
6873 | match = TRUE; /* Everything above 255 matches */ | |
e051a21d | 6874 | } |
6f8d7d0d KW |
6875 | else if (ANYOF_NONBITMAP(n) |
6876 | && ((flags & ANYOF_NONBITMAP_NON_UTF8) | |
6877 | || (utf8_target | |
6878 | && (c >=256 | |
6879 | || (! (flags & ANYOF_LOCALE)) | |
6880 | || (flags & ANYOF_IS_SYNTHETIC))))) | |
ef87b810 | 6881 | { |
7cdde544 | 6882 | AV *av; |
210e6c47 | 6883 | SV * const sw = core_regclass_swash(prog, n, TRUE, 0, (SV**)&av); |
7cdde544 KW |
6884 | |
6885 | if (sw) { | |
6886 | U8 * utf8_p; | |
6887 | if (utf8_target) { | |
6888 | utf8_p = (U8 *) p; | |
6889 | } else { | |
f56b6394 KW |
6890 | |
6891 | /* Not utf8. Convert as much of the string as available up | |
6892 | * to the limit of how far the (single) character in the | |
6893 | * pattern can possibly match (no need to go further). If | |
6894 | * the node is a straight ANYOF or not folding, it can't | |
6895 | * match more than one. Otherwise, It can match up to how | |
6896 | * far a single char can fold to. Since not utf8, each | |
6897 | * character is a single byte, so the max it can be in | |
6898 | * bytes is the same as the max it can be in characters */ | |
6899 | STRLEN len = (OP(n) == ANYOF | |
6900 | || ! (flags & ANYOF_LOC_NONBITMAP_FOLD)) | |
6901 | ? 1 | |
6902 | : (maxlen < UTF8_MAX_FOLD_CHAR_EXPAND) | |
6903 | ? maxlen | |
6904 | : UTF8_MAX_FOLD_CHAR_EXPAND; | |
7cdde544 KW |
6905 | utf8_p = bytes_to_utf8(p, &len); |
6906 | } | |
f56b6394 | 6907 | |
f7eb7452 | 6908 | if (swash_fetch(sw, utf8_p, TRUE)) |
7cdde544 | 6909 | match = TRUE; |
39065660 | 6910 | else if (flags & ANYOF_LOC_NONBITMAP_FOLD) { |
f56b6394 KW |
6911 | |
6912 | /* Here, we need to test if the fold of the target string | |
8d5d17fa KW |
6913 | * matches. The non-multi char folds have all been moved to |
6914 | * the compilation phase, and the multi-char folds have | |
6915 | * been stored by regcomp into 'av'; we linearly check to | |
6916 | * see if any match the target string (folded). We know | |
6917 | * that the originals were each one character, but we don't | |
6918 | * currently know how many characters/bytes each folded to, | |
6919 | * except we do know that there are small limits imposed by | |
6920 | * Unicode. XXX A performance enhancement would be to have | |
6921 | * regcomp.c store the max number of chars/bytes that are | |
6922 | * in an av entry, as, say the 0th element. Even better | |
6923 | * would be to have a hash of the few characters that can | |
6924 | * start a multi-char fold to the max number of chars of | |
6925 | * those folds. | |
f56b6394 KW |
6926 | * |
6927 | * If there is a match, we will need to advance (if lenp is | |
6928 | * specified) the match pointer in the target string. But | |
6929 | * what we are comparing here isn't that string directly, | |
6930 | * but its fold, whose length may differ from the original. | |
6931 | * As we go along in constructing the fold, therefore, we | |
6932 | * create a map so that we know how many bytes in the | |
6933 | * source to advance given that we have matched a certain | |
6934 | * number of bytes in the fold. This map is stored in | |
6438af90 KW |
6935 | * 'map_fold_len_back'. Let n mean the number of bytes in |
6936 | * the fold of the first character that we are folding. | |
6937 | * Then map_fold_len_back[n] is set to the number of bytes | |
6938 | * in that first character. Similarly let m be the | |
6939 | * corresponding number for the second character to be | |
6940 | * folded. Then map_fold_len_back[n+m] is set to the | |
6941 | * number of bytes occupied by the first two source | |
6942 | * characters. ... */ | |
6943 | U8 map_fold_len_back[UTF8_MAXBYTES_CASE+1] = { 0 }; | |
f56b6394 KW |
6944 | U8 folded[UTF8_MAXBYTES_CASE+1]; |
6945 | STRLEN foldlen = 0; /* num bytes in fold of 1st char */ | |
deba3d96 | 6946 | STRLEN total_foldlen = 0; /* num bytes in fold of all |
6438af90 | 6947 | chars */ |
f56b6394 KW |
6948 | |
6949 | if (OP(n) == ANYOF || maxlen == 1 || ! lenp || ! av) { | |
6950 | ||
6951 | /* Here, only need to fold the first char of the target | |
6438af90 | 6952 | * string. It the source wasn't utf8, is 1 byte long */ |
f56b6394 | 6953 | to_utf8_fold(utf8_p, folded, &foldlen); |
deba3d96 | 6954 | total_foldlen = foldlen; |
6438af90 KW |
6955 | map_fold_len_back[foldlen] = (utf8_target) |
6956 | ? UTF8SKIP(utf8_p) | |
6957 | : 1; | |
f56b6394 KW |
6958 | } |
6959 | else { | |
6960 | ||
6961 | /* Here, need to fold more than the first char. Do so | |
6962 | * up to the limits */ | |
f56b6394 KW |
6963 | U8* source_ptr = utf8_p; /* The source for the fold |
6964 | is the regex target | |
6965 | string */ | |
6966 | U8* folded_ptr = folded; | |
6967 | U8* e = utf8_p + maxlen; /* Can't go beyond last | |
6968 | available byte in the | |
6969 | target string */ | |
6438af90 KW |
6970 | U8 i; |
6971 | for (i = 0; | |
6972 | i < UTF8_MAX_FOLD_CHAR_EXPAND && source_ptr < e; | |
6973 | i++) | |
f56b6394 KW |
6974 | { |
6975 | ||
6976 | /* Fold the next character */ | |
6977 | U8 this_char_folded[UTF8_MAXBYTES_CASE+1]; | |
6978 | STRLEN this_char_foldlen; | |
6979 | to_utf8_fold(source_ptr, | |
6980 | this_char_folded, | |
6981 | &this_char_foldlen); | |
6982 | ||
6983 | /* Bail if it would exceed the byte limit for | |
6984 | * folding a single char. */ | |
6985 | if (this_char_foldlen + folded_ptr - folded > | |
6986 | UTF8_MAXBYTES_CASE) | |
6987 | { | |
6988 | break; | |
6989 | } | |
6990 | ||
6438af90 | 6991 | /* Add the fold of this character */ |
f56b6394 KW |
6992 | Copy(this_char_folded, |
6993 | folded_ptr, | |
6994 | this_char_foldlen, | |
6995 | U8); | |
f56b6394 | 6996 | source_ptr += UTF8SKIP(source_ptr); |
6438af90 | 6997 | folded_ptr += this_char_foldlen; |
deba3d96 | 6998 | total_foldlen = folded_ptr - folded; |
6438af90 KW |
6999 | |
7000 | /* Create map from the number of bytes in the fold | |
7001 | * back to the number of bytes in the source. If | |
7002 | * the source isn't utf8, the byte count is just | |
7003 | * the number of characters so far */ | |
deba3d96 | 7004 | map_fold_len_back[total_foldlen] |
6438af90 KW |
7005 | = (utf8_target) |
7006 | ? source_ptr - utf8_p | |
7007 | : i + 1; | |
f56b6394 KW |
7008 | } |
7009 | *folded_ptr = '\0'; | |
f56b6394 KW |
7010 | } |
7011 | ||
7012 | ||
7013 | /* Do the linear search to see if the fold is in the list | |
8f2655f7 KW |
7014 | * of multi-char folds. */ |
7015 | if (av) { | |
7cdde544 KW |
7016 | I32 i; |
7017 | for (i = 0; i <= av_len(av); i++) { | |
7018 | SV* const sv = *av_fetch(av, i, FALSE); | |
7019 | STRLEN len; | |
7020 | const char * const s = SvPV_const(sv, len); | |
6438af90 | 7021 | |
f9126265 KW |
7022 | if (len <= total_foldlen |
7023 | && memEQ(s, (char*)folded, len) | |
7024 | ||
7025 | /* If 0, means matched a partial char. See | |
7026 | * [perl #90536] */ | |
7027 | && map_fold_len_back[len]) | |
f56b6394 KW |
7028 | { |
7029 | ||
7030 | /* Advance the target string ptr to account for | |
7031 | * this fold, but have to translate from the | |
7032 | * folded length to the corresponding source | |
6438af90 | 7033 | * length. */ |
8f2655f7 KW |
7034 | if (lenp) { |
7035 | *lenp = map_fold_len_back[len]; | |
8f2655f7 | 7036 | } |
7cdde544 KW |
7037 | match = TRUE; |
7038 | break; | |
7039 | } | |
7040 | } | |
7041 | } | |
7cdde544 KW |
7042 | } |
7043 | ||
7044 | /* If we allocated a string above, free it */ | |
7045 | if (! utf8_target) Safefree(utf8_p); | |
7046 | } | |
7047 | } | |
5073ffbd KW |
7048 | |
7049 | if (UNICODE_IS_SUPER(c) | |
7050 | && (flags & ANYOF_WARN_SUPER) | |
7051 | && ckWARN_d(WARN_NON_UNICODE)) | |
7052 | { | |
7053 | Perl_warner(aTHX_ packWARN(WARN_NON_UNICODE), | |
7054 | "Code point 0x%04"UVXf" is not Unicode, all \\p{} matches fail; all \\P{} matches succeed", c); | |
7055 | } | |
7cdde544 KW |
7056 | } |
7057 | ||
f0fdc1c9 KW |
7058 | /* The xor complements the return if to invert: 1^1 = 0, 1^0 = 1 */ |
7059 | return cBOOL(flags & ANYOF_INVERT) ^ match; | |
a0ed51b3 | 7060 | } |
161b471a | 7061 | |
dfe13c55 | 7062 | STATIC U8 * |
0ce71af7 | 7063 | S_reghop3(U8 *s, I32 off, const U8* lim) |
9041c2e3 | 7064 | { |
6af86488 KW |
7065 | /* return the position 'off' UTF-8 characters away from 's', forward if |
7066 | * 'off' >= 0, backwards if negative. But don't go outside of position | |
7067 | * 'lim', which better be < s if off < 0 */ | |
7068 | ||
97aff369 | 7069 | dVAR; |
7918f24d NC |
7070 | |
7071 | PERL_ARGS_ASSERT_REGHOP3; | |
7072 | ||
a0ed51b3 | 7073 | if (off >= 0) { |
1aa99e6b | 7074 | while (off-- && s < lim) { |
ffc61ed2 | 7075 | /* XXX could check well-formedness here */ |
a0ed51b3 | 7076 | s += UTF8SKIP(s); |
ffc61ed2 | 7077 | } |
a0ed51b3 LW |
7078 | } |
7079 | else { | |
1de06328 YO |
7080 | while (off++ && s > lim) { |
7081 | s--; | |
7082 | if (UTF8_IS_CONTINUED(*s)) { | |
7083 | while (s > lim && UTF8_IS_CONTINUATION(*s)) | |
7084 | s--; | |
a0ed51b3 | 7085 | } |
1de06328 | 7086 | /* XXX could check well-formedness here */ |
a0ed51b3 LW |
7087 | } |
7088 | } | |
7089 | return s; | |
7090 | } | |
161b471a | 7091 | |
f9f4320a YO |
7092 | #ifdef XXX_dmq |
7093 | /* there are a bunch of places where we use two reghop3's that should | |
7094 | be replaced with this routine. but since thats not done yet | |
7095 | we ifdef it out - dmq | |
7096 | */ | |
dfe13c55 | 7097 | STATIC U8 * |
1de06328 YO |
7098 | S_reghop4(U8 *s, I32 off, const U8* llim, const U8* rlim) |
7099 | { | |
7100 | dVAR; | |
7918f24d NC |
7101 | |
7102 | PERL_ARGS_ASSERT_REGHOP4; | |
7103 | ||
1de06328 YO |
7104 | if (off >= 0) { |
7105 | while (off-- && s < rlim) { | |
7106 | /* XXX could check well-formedness here */ | |
7107 | s += UTF8SKIP(s); | |
7108 | } | |
7109 | } | |
7110 | else { | |
7111 | while (off++ && s > llim) { | |
7112 | s--; | |
7113 | if (UTF8_IS_CONTINUED(*s)) { | |
7114 | while (s > llim && UTF8_IS_CONTINUATION(*s)) | |
7115 | s--; | |
7116 | } | |
7117 | /* XXX could check well-formedness here */ | |
7118 | } | |
7119 | } | |
7120 | return s; | |
7121 | } | |
f9f4320a | 7122 | #endif |
1de06328 YO |
7123 | |
7124 | STATIC U8 * | |
0ce71af7 | 7125 | S_reghopmaybe3(U8* s, I32 off, const U8* lim) |
a0ed51b3 | 7126 | { |
97aff369 | 7127 | dVAR; |
7918f24d NC |
7128 | |
7129 | PERL_ARGS_ASSERT_REGHOPMAYBE3; | |
7130 | ||
a0ed51b3 | 7131 | if (off >= 0) { |
1aa99e6b | 7132 | while (off-- && s < lim) { |
ffc61ed2 | 7133 | /* XXX could check well-formedness here */ |
a0ed51b3 | 7134 | s += UTF8SKIP(s); |
ffc61ed2 | 7135 | } |
a0ed51b3 | 7136 | if (off >= 0) |
3dab1dad | 7137 | return NULL; |
a0ed51b3 LW |
7138 | } |
7139 | else { | |
1de06328 YO |
7140 | while (off++ && s > lim) { |
7141 | s--; | |
7142 | if (UTF8_IS_CONTINUED(*s)) { | |
7143 | while (s > lim && UTF8_IS_CONTINUATION(*s)) | |
7144 | s--; | |
a0ed51b3 | 7145 | } |
1de06328 | 7146 | /* XXX could check well-formedness here */ |
a0ed51b3 LW |
7147 | } |
7148 | if (off <= 0) | |
3dab1dad | 7149 | return NULL; |
a0ed51b3 LW |
7150 | } |
7151 | return s; | |
7152 | } | |
51371543 | 7153 | |
51371543 | 7154 | static void |
acfe0abc | 7155 | restore_pos(pTHX_ void *arg) |
51371543 | 7156 | { |
97aff369 | 7157 | dVAR; |
097eb12c | 7158 | regexp * const rex = (regexp *)arg; |
ed301438 | 7159 | if (PL_reg_state.re_state_eval_setup_done) { |
51371543 | 7160 | if (PL_reg_oldsaved) { |
4f639d21 DM |
7161 | rex->subbeg = PL_reg_oldsaved; |
7162 | rex->sublen = PL_reg_oldsavedlen; | |
f8c7b90f | 7163 | #ifdef PERL_OLD_COPY_ON_WRITE |
4f639d21 | 7164 | rex->saved_copy = PL_nrs; |
ed252734 | 7165 | #endif |
07bc277f | 7166 | RXp_MATCH_COPIED_on(rex); |
51371543 GS |
7167 | } |
7168 | PL_reg_magic->mg_len = PL_reg_oldpos; | |
ed301438 | 7169 | PL_reg_state.re_state_eval_setup_done = FALSE; |
51371543 GS |
7170 | PL_curpm = PL_reg_oldcurpm; |
7171 | } | |
7172 | } | |
33b8afdf JH |
7173 | |
7174 | STATIC void | |
7175 | S_to_utf8_substr(pTHX_ register regexp *prog) | |
7176 | { | |
a1cac82e | 7177 | int i = 1; |
7918f24d NC |
7178 | |
7179 | PERL_ARGS_ASSERT_TO_UTF8_SUBSTR; | |
7180 | ||
a1cac82e NC |
7181 | do { |
7182 | if (prog->substrs->data[i].substr | |
7183 | && !prog->substrs->data[i].utf8_substr) { | |
7184 | SV* const sv = newSVsv(prog->substrs->data[i].substr); | |
7185 | prog->substrs->data[i].utf8_substr = sv; | |
7186 | sv_utf8_upgrade(sv); | |
610460f9 | 7187 | if (SvVALID(prog->substrs->data[i].substr)) { |
cffe132d | 7188 | if (SvTAIL(prog->substrs->data[i].substr)) { |
610460f9 NC |
7189 | /* Trim the trailing \n that fbm_compile added last |
7190 | time. */ | |
7191 | SvCUR_set(sv, SvCUR(sv) - 1); | |
7192 | /* Whilst this makes the SV technically "invalid" (as its | |
7193 | buffer is no longer followed by "\0") when fbm_compile() | |
7194 | adds the "\n" back, a "\0" is restored. */ | |
cffe132d NC |
7195 | fbm_compile(sv, FBMcf_TAIL); |
7196 | } else | |
7197 | fbm_compile(sv, 0); | |
610460f9 | 7198 | } |
a1cac82e NC |
7199 | if (prog->substrs->data[i].substr == prog->check_substr) |
7200 | prog->check_utf8 = sv; | |
7201 | } | |
7202 | } while (i--); | |
33b8afdf JH |
7203 | } |
7204 | ||
7205 | STATIC void | |
7206 | S_to_byte_substr(pTHX_ register regexp *prog) | |
7207 | { | |
97aff369 | 7208 | dVAR; |
a1cac82e | 7209 | int i = 1; |
7918f24d NC |
7210 | |
7211 | PERL_ARGS_ASSERT_TO_BYTE_SUBSTR; | |
7212 | ||
a1cac82e NC |
7213 | do { |
7214 | if (prog->substrs->data[i].utf8_substr | |
7215 | && !prog->substrs->data[i].substr) { | |
7216 | SV* sv = newSVsv(prog->substrs->data[i].utf8_substr); | |
7217 | if (sv_utf8_downgrade(sv, TRUE)) { | |
610460f9 | 7218 | if (SvVALID(prog->substrs->data[i].utf8_substr)) { |
cffe132d | 7219 | if (SvTAIL(prog->substrs->data[i].utf8_substr)) { |
610460f9 NC |
7220 | /* Trim the trailing \n that fbm_compile added last |
7221 | time. */ | |
7222 | SvCUR_set(sv, SvCUR(sv) - 1); | |
cffe132d NC |
7223 | fbm_compile(sv, FBMcf_TAIL); |
7224 | } else | |
7225 | fbm_compile(sv, 0); | |
7226 | } | |
a1cac82e NC |
7227 | } else { |
7228 | SvREFCNT_dec(sv); | |
7229 | sv = &PL_sv_undef; | |
7230 | } | |
7231 | prog->substrs->data[i].substr = sv; | |
7232 | if (prog->substrs->data[i].utf8_substr == prog->check_utf8) | |
7233 | prog->check_substr = sv; | |
33b8afdf | 7234 | } |
a1cac82e | 7235 | } while (i--); |
33b8afdf | 7236 | } |
66610fdd RGS |
7237 | |
7238 | /* | |
7239 | * Local variables: | |
7240 | * c-indentation-style: bsd | |
7241 | * c-basic-offset: 4 | |
14d04a33 | 7242 | * indent-tabs-mode: nil |
66610fdd RGS |
7243 | * End: |
7244 | * | |
14d04a33 | 7245 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 7246 | */ |