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 | |
c277df42 IZ |
83 | #define RF_tainted 1 /* tainted information used? */ |
84 | #define RF_warned 2 /* warned about big count? */ | |
faec1544 | 85 | |
ab3bbdeb | 86 | #define RF_utf8 8 /* Pattern contains multibyte chars? */ |
a0ed51b3 | 87 | |
f2ed9b32 | 88 | #define UTF_PATTERN ((PL_reg_flags & RF_utf8) != 0) |
ce862d02 IZ |
89 | |
90 | #define RS_init 1 /* eval environment created */ | |
91 | #define RS_set 2 /* replsv value is set */ | |
c277df42 | 92 | |
a687059c LW |
93 | #ifndef STATIC |
94 | #define STATIC static | |
95 | #endif | |
96 | ||
af364d03 KW |
97 | /* Valid for non-utf8 strings only: avoids the reginclass call if there are no |
98 | * complications: i.e., if everything matchable is straight forward in the | |
99 | * bitmap */ | |
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 */ |
1a4fad37 AL |
125 | #define LOAD_UTF8_CHARCLASS(class,str) STMT_START { \ |
126 | if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)str); assert(ok); LEAVE; } } STMT_END | |
37e2e78e KW |
127 | |
128 | /* Doesn't do an assert to verify that is correct */ | |
129 | #define LOAD_UTF8_CHARCLASS_NO_CHECK(class) STMT_START { \ | |
130 | if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)" "); LEAVE; } } STMT_END | |
131 | ||
1a4fad37 AL |
132 | #define LOAD_UTF8_CHARCLASS_ALNUM() LOAD_UTF8_CHARCLASS(alnum,"a") |
133 | #define LOAD_UTF8_CHARCLASS_DIGIT() LOAD_UTF8_CHARCLASS(digit,"0") | |
134 | #define LOAD_UTF8_CHARCLASS_SPACE() LOAD_UTF8_CHARCLASS(space," ") | |
51371543 | 135 | |
37e2e78e | 136 | #define LOAD_UTF8_CHARCLASS_GCB() /* Grapheme cluster boundaries */ \ |
d275fa5e CB |
137 | LOAD_UTF8_CHARCLASS(X_begin, " "); \ |
138 | LOAD_UTF8_CHARCLASS(X_non_hangul, "A"); \ | |
37e2e78e KW |
139 | /* These are utf8 constants, and not utf-ebcdic constants, so the \ |
140 | * assert should likely and hopefully fail on an EBCDIC machine */ \ | |
d275fa5e | 141 | LOAD_UTF8_CHARCLASS(X_extend, "\xcc\x80"); /* U+0300 */ \ |
37e2e78e KW |
142 | \ |
143 | /* No asserts are done for these, in case called on an early \ | |
144 | * Unicode version in which they map to nothing */ \ | |
d275fa5e CB |
145 | LOAD_UTF8_CHARCLASS_NO_CHECK(X_prepend);/* U+0E40 "\xe0\xb9\x80" */ \ |
146 | LOAD_UTF8_CHARCLASS_NO_CHECK(X_L); /* U+1100 "\xe1\x84\x80" */ \ | |
147 | LOAD_UTF8_CHARCLASS_NO_CHECK(X_LV); /* U+AC00 "\xea\xb0\x80" */ \ | |
148 | LOAD_UTF8_CHARCLASS_NO_CHECK(X_LVT); /* U+AC01 "\xea\xb0\x81" */ \ | |
149 | LOAD_UTF8_CHARCLASS_NO_CHECK(X_LV_LVT_V);/* U+AC01 "\xea\xb0\x81" */\ | |
150 | LOAD_UTF8_CHARCLASS_NO_CHECK(X_T); /* U+11A8 "\xe1\x86\xa8" */ \ | |
37e2e78e | 151 | LOAD_UTF8_CHARCLASS_NO_CHECK(X_V) /* U+1160 "\xe1\x85\xa0" */ |
20d0b1e9 | 152 | |
d1eb3177 YO |
153 | /* |
154 | We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test | |
155 | so that it is possible to override the option here without having to | |
156 | rebuild the entire core. as we are required to do if we change regcomp.h | |
157 | which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined. | |
158 | */ | |
159 | #if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS | |
160 | #define BROKEN_UNICODE_CHARCLASS_MAPPINGS | |
161 | #endif | |
162 | ||
163 | #ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS | |
164 | #define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS_ALNUM() | |
165 | #define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS_SPACE() | |
166 | #define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS_DIGIT() | |
167 | #define RE_utf8_perl_word PL_utf8_alnum | |
168 | #define RE_utf8_perl_space PL_utf8_space | |
169 | #define RE_utf8_posix_digit PL_utf8_digit | |
170 | #define perl_word alnum | |
171 | #define perl_space space | |
172 | #define posix_digit digit | |
173 | #else | |
174 | #define LOAD_UTF8_CHARCLASS_PERL_WORD() LOAD_UTF8_CHARCLASS(perl_word,"a") | |
175 | #define LOAD_UTF8_CHARCLASS_PERL_SPACE() LOAD_UTF8_CHARCLASS(perl_space," ") | |
176 | #define LOAD_UTF8_CHARCLASS_POSIX_DIGIT() LOAD_UTF8_CHARCLASS(posix_digit,"0") | |
177 | #define RE_utf8_perl_word PL_utf8_perl_word | |
178 | #define RE_utf8_perl_space PL_utf8_perl_space | |
179 | #define RE_utf8_posix_digit PL_utf8_posix_digit | |
180 | #endif | |
181 | ||
182 | ||
c02a0702 KW |
183 | #define _CCC_TRY_AFF_COMMON(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC) \ |
184 | case NAMEL: \ | |
185 | PL_reg_flags |= RF_tainted; \ | |
186 | /* FALL THROUGH */ \ | |
187 | case NAME: \ | |
188 | if (!nextchr) \ | |
189 | sayNO; \ | |
190 | if (utf8_target && UTF8_IS_CONTINUED(nextchr)) { \ | |
191 | if (!CAT2(PL_utf8_,CLASS)) { \ | |
192 | bool ok; \ | |
193 | ENTER; \ | |
194 | save_re_context(); \ | |
195 | ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \ | |
196 | assert(ok); \ | |
197 | LEAVE; \ | |
198 | } \ | |
199 | if (!(OP(scan) == NAME \ | |
f2ed9b32 | 200 | ? cBOOL(swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, utf8_target)) \ |
c02a0702 KW |
201 | : LCFUNC_utf8((U8*)locinput))) \ |
202 | { \ | |
203 | sayNO; \ | |
204 | } \ | |
205 | locinput += PL_utf8skip[nextchr]; \ | |
206 | nextchr = UCHARAT(locinput); \ | |
207 | break; \ | |
208 | } \ | |
a12cf05f | 209 | /* Drops through to the macro that calls this one */ |
c02a0702 KW |
210 | |
211 | #define CCC_TRY_AFF(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \ | |
212 | _CCC_TRY_AFF_COMMON(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC) \ | |
213 | if (!(OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \ | |
214 | sayNO; \ | |
215 | nextchr = UCHARAT(++locinput); \ | |
20d0b1e9 YO |
216 | break |
217 | ||
b10ac0d8 KW |
218 | /* Almost identical to the above, but has a case for a node that matches chars |
219 | * between 128 and 255 using Unicode (latin1) semantics. */ | |
220 | #define CCC_TRY_AFF_U(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNCU,LCFUNC) \ | |
c02a0702 | 221 | _CCC_TRY_AFF_COMMON(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC) \ |
b10ac0d8 | 222 | if (!(OP(scan) == NAMEL ? LCFUNC(nextchr) : (FUNCU(nextchr) && (isASCII(nextchr) || (FLAGS(scan) & USE_UNI))))) \ |
c02a0702 KW |
223 | sayNO; \ |
224 | nextchr = UCHARAT(++locinput); \ | |
b10ac0d8 KW |
225 | break |
226 | ||
c02a0702 KW |
227 | #define _CCC_TRY_NEG_COMMON(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC) \ |
228 | case NAMEL: \ | |
229 | PL_reg_flags |= RF_tainted; \ | |
230 | /* FALL THROUGH */ \ | |
231 | case NAME : \ | |
232 | if (!nextchr && locinput >= PL_regeol) \ | |
233 | sayNO; \ | |
234 | if (utf8_target && UTF8_IS_CONTINUED(nextchr)) { \ | |
235 | if (!CAT2(PL_utf8_,CLASS)) { \ | |
236 | bool ok; \ | |
237 | ENTER; \ | |
238 | save_re_context(); \ | |
239 | ok=CAT2(is_utf8_,CLASS)((const U8*)STR); \ | |
240 | assert(ok); \ | |
241 | LEAVE; \ | |
242 | } \ | |
243 | if ((OP(scan) == NAME \ | |
f2ed9b32 | 244 | ? cBOOL(swash_fetch(CAT2(PL_utf8_,CLASS), (U8*)locinput, utf8_target)) \ |
c02a0702 KW |
245 | : LCFUNC_utf8((U8*)locinput))) \ |
246 | { \ | |
247 | sayNO; \ | |
248 | } \ | |
249 | locinput += PL_utf8skip[nextchr]; \ | |
250 | nextchr = UCHARAT(locinput); \ | |
251 | break; \ | |
b10ac0d8 KW |
252 | } |
253 | ||
c02a0702 KW |
254 | #define CCC_TRY_NEG(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC,LCFUNC) \ |
255 | _CCC_TRY_NEG_COMMON(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNC) \ | |
256 | if ((OP(scan) == NAME ? FUNC(nextchr) : LCFUNC(nextchr))) \ | |
257 | sayNO; \ | |
258 | nextchr = UCHARAT(++locinput); \ | |
20d0b1e9 YO |
259 | break |
260 | ||
261 | ||
c02a0702 KW |
262 | #define CCC_TRY_NEG_U(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNCU,LCFUNC) \ |
263 | _CCC_TRY_NEG_COMMON(NAME,NAMEL,CLASS,STR,LCFUNC_utf8,FUNCU) \ | |
b10ac0d8 | 264 | if ((OP(scan) == NAMEL ? LCFUNC(nextchr) : (FUNCU(nextchr) && (isASCII(nextchr) || (FLAGS(scan) & USE_UNI))))) \ |
c02a0702 KW |
265 | sayNO; \ |
266 | nextchr = UCHARAT(++locinput); \ | |
b10ac0d8 | 267 | break |
d1eb3177 YO |
268 | |
269 | ||
270 | ||
3dab1dad YO |
271 | /* TODO: Combine JUMPABLE and HAS_TEXT to cache OP(rn) */ |
272 | ||
5f80c4cf | 273 | /* for use after a quantifier and before an EXACT-like node -- japhy */ |
c35dcbe2 YO |
274 | /* it would be nice to rework regcomp.sym to generate this stuff. sigh |
275 | * | |
276 | * NOTE that *nothing* that affects backtracking should be in here, specifically | |
277 | * VERBS must NOT be included. JUMPABLE is used to determine if we can ignore a | |
278 | * node that is in between two EXACT like nodes when ascertaining what the required | |
279 | * "follow" character is. This should probably be moved to regex compile time | |
280 | * although it may be done at run time beause of the REF possibility - more | |
281 | * investigation required. -- demerphq | |
282 | */ | |
3e901dc0 YO |
283 | #define JUMPABLE(rn) ( \ |
284 | OP(rn) == OPEN || \ | |
285 | (OP(rn) == CLOSE && (!cur_eval || cur_eval->u.eval.close_paren != ARG(rn))) || \ | |
286 | OP(rn) == EVAL || \ | |
cca55fe3 JP |
287 | OP(rn) == SUSPEND || OP(rn) == IFMATCH || \ |
288 | OP(rn) == PLUS || OP(rn) == MINMOD || \ | |
d1c771f5 | 289 | OP(rn) == KEEPS || \ |
3dab1dad | 290 | (PL_regkind[OP(rn)] == CURLY && ARG1(rn) > 0) \ |
e2d8ce26 | 291 | ) |
ee9b8eae | 292 | #define IS_EXACT(rn) (PL_regkind[OP(rn)] == EXACT) |
e2d8ce26 | 293 | |
ee9b8eae YO |
294 | #define HAS_TEXT(rn) ( IS_EXACT(rn) || PL_regkind[OP(rn)] == REF ) |
295 | ||
296 | #if 0 | |
297 | /* Currently these are only used when PL_regkind[OP(rn)] == EXACT so | |
298 | we don't need this definition. */ | |
299 | #define IS_TEXT(rn) ( OP(rn)==EXACT || OP(rn)==REF || OP(rn)==NREF ) | |
300 | #define IS_TEXTF(rn) ( OP(rn)==EXACTF || OP(rn)==REFF || OP(rn)==NREFF ) | |
301 | #define IS_TEXTFL(rn) ( OP(rn)==EXACTFL || OP(rn)==REFFL || OP(rn)==NREFFL ) | |
302 | ||
303 | #else | |
304 | /* ... so we use this as its faster. */ | |
305 | #define IS_TEXT(rn) ( OP(rn)==EXACT ) | |
306 | #define IS_TEXTF(rn) ( OP(rn)==EXACTF ) | |
307 | #define IS_TEXTFL(rn) ( OP(rn)==EXACTFL ) | |
308 | ||
309 | #endif | |
e2d8ce26 | 310 | |
a84d97b6 HS |
311 | /* |
312 | Search for mandatory following text node; for lookahead, the text must | |
313 | follow but for lookbehind (rn->flags != 0) we skip to the next step. | |
314 | */ | |
cca55fe3 | 315 | #define FIND_NEXT_IMPT(rn) STMT_START { \ |
3dab1dad YO |
316 | while (JUMPABLE(rn)) { \ |
317 | const OPCODE type = OP(rn); \ | |
318 | if (type == SUSPEND || PL_regkind[type] == CURLY) \ | |
e2d8ce26 | 319 | rn = NEXTOPER(NEXTOPER(rn)); \ |
3dab1dad | 320 | else if (type == PLUS) \ |
cca55fe3 | 321 | rn = NEXTOPER(rn); \ |
3dab1dad | 322 | else if (type == IFMATCH) \ |
a84d97b6 | 323 | rn = (rn->flags == 0) ? NEXTOPER(NEXTOPER(rn)) : rn + ARG(rn); \ |
e2d8ce26 | 324 | else rn += NEXT_OFF(rn); \ |
3dab1dad | 325 | } \ |
5f80c4cf | 326 | } STMT_END |
74750237 | 327 | |
c476f425 | 328 | |
acfe0abc | 329 | static void restore_pos(pTHX_ void *arg); |
51371543 | 330 | |
620d5b66 NC |
331 | #define REGCP_PAREN_ELEMS 4 |
332 | #define REGCP_OTHER_ELEMS 5 | |
e0fa7e2b | 333 | #define REGCP_FRAME_ELEMS 1 |
620d5b66 NC |
334 | /* REGCP_FRAME_ELEMS are not part of the REGCP_OTHER_ELEMS and |
335 | * are needed for the regexp context stack bookkeeping. */ | |
336 | ||
76e3520e | 337 | STATIC CHECKPOINT |
cea2e8a9 | 338 | S_regcppush(pTHX_ I32 parenfloor) |
a0d0e21e | 339 | { |
97aff369 | 340 | dVAR; |
a3b680e6 | 341 | const int retval = PL_savestack_ix; |
a3b680e6 | 342 | const int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS; |
e0fa7e2b NC |
343 | const UV total_elems = paren_elems_to_push + REGCP_OTHER_ELEMS; |
344 | const UV elems_shifted = total_elems << SAVE_TIGHT_SHIFT; | |
a0d0e21e | 345 | int p; |
40a82448 | 346 | GET_RE_DEBUG_FLAGS_DECL; |
a0d0e21e | 347 | |
e49a9654 IH |
348 | if (paren_elems_to_push < 0) |
349 | Perl_croak(aTHX_ "panic: paren_elems_to_push < 0"); | |
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 | |
3280af22 | 358 | for (p = PL_regsize; p > parenfloor; p--) { |
b1ce53c5 | 359 | /* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */ |
f0ab9afb NC |
360 | SSPUSHINT(PL_regoffs[p].end); |
361 | SSPUSHINT(PL_regoffs[p].start); | |
3280af22 | 362 | SSPUSHPTR(PL_reg_start_tmp[p]); |
a0d0e21e | 363 | SSPUSHINT(p); |
e7707071 | 364 | DEBUG_BUFFERS_r(PerlIO_printf(Perl_debug_log, |
40a82448 | 365 | " saving \\%"UVuf" %"IVdf"(%"IVdf")..%"IVdf"\n", |
f0ab9afb | 366 | (UV)p, (IV)PL_regoffs[p].start, |
40a82448 | 367 | (IV)(PL_reg_start_tmp[p] - PL_bostr), |
f0ab9afb | 368 | (IV)PL_regoffs[p].end |
40a82448 | 369 | )); |
a0d0e21e | 370 | } |
b1ce53c5 | 371 | /* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */ |
f0ab9afb | 372 | SSPUSHPTR(PL_regoffs); |
3280af22 NIS |
373 | SSPUSHINT(PL_regsize); |
374 | SSPUSHINT(*PL_reglastparen); | |
a01268b5 | 375 | SSPUSHINT(*PL_reglastcloseparen); |
3280af22 | 376 | SSPUSHPTR(PL_reginput); |
e0fa7e2b | 377 | SSPUSHUV(SAVEt_REGCONTEXT | elems_shifted); /* Magic cookie. */ |
41123dfd | 378 | |
a0d0e21e LW |
379 | return retval; |
380 | } | |
381 | ||
c277df42 | 382 | /* These are needed since we do not localize EVAL nodes: */ |
ab3bbdeb YO |
383 | #define REGCP_SET(cp) \ |
384 | DEBUG_STATE_r( \ | |
ab3bbdeb | 385 | PerlIO_printf(Perl_debug_log, \ |
e4f74956 | 386 | " Setting an EVAL scope, savestack=%"IVdf"\n", \ |
ab3bbdeb YO |
387 | (IV)PL_savestack_ix)); \ |
388 | cp = PL_savestack_ix | |
c3464db5 | 389 | |
ab3bbdeb | 390 | #define REGCP_UNWIND(cp) \ |
e4f74956 | 391 | DEBUG_STATE_r( \ |
ab3bbdeb | 392 | if (cp != PL_savestack_ix) \ |
e4f74956 YO |
393 | PerlIO_printf(Perl_debug_log, \ |
394 | " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \ | |
ab3bbdeb YO |
395 | (IV)(cp), (IV)PL_savestack_ix)); \ |
396 | regcpblow(cp) | |
c277df42 | 397 | |
76e3520e | 398 | STATIC char * |
097eb12c | 399 | S_regcppop(pTHX_ const regexp *rex) |
a0d0e21e | 400 | { |
97aff369 | 401 | dVAR; |
e0fa7e2b | 402 | UV i; |
a0d0e21e | 403 | char *input; |
a3621e74 YO |
404 | GET_RE_DEBUG_FLAGS_DECL; |
405 | ||
7918f24d NC |
406 | PERL_ARGS_ASSERT_REGCPPOP; |
407 | ||
b1ce53c5 | 408 | /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */ |
c6bf6a65 | 409 | i = SSPOPUV; |
e0fa7e2b NC |
410 | assert((i & SAVE_MASK) == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */ |
411 | i >>= SAVE_TIGHT_SHIFT; /* Parentheses elements to pop. */ | |
a0d0e21e | 412 | input = (char *) SSPOPPTR; |
a01268b5 | 413 | *PL_reglastcloseparen = SSPOPINT; |
3280af22 NIS |
414 | *PL_reglastparen = SSPOPINT; |
415 | PL_regsize = SSPOPINT; | |
f0ab9afb | 416 | PL_regoffs=(regexp_paren_pair *) SSPOPPTR; |
b1ce53c5 | 417 | |
620d5b66 | 418 | i -= REGCP_OTHER_ELEMS; |
b1ce53c5 | 419 | /* Now restore the parentheses context. */ |
620d5b66 | 420 | for ( ; i > 0; i -= REGCP_PAREN_ELEMS) { |
1df70142 | 421 | I32 tmps; |
097eb12c | 422 | U32 paren = (U32)SSPOPINT; |
3280af22 | 423 | PL_reg_start_tmp[paren] = (char *) SSPOPPTR; |
f0ab9afb | 424 | PL_regoffs[paren].start = SSPOPINT; |
cf93c79d | 425 | tmps = SSPOPINT; |
3280af22 | 426 | if (paren <= *PL_reglastparen) |
f0ab9afb | 427 | PL_regoffs[paren].end = tmps; |
e7707071 | 428 | DEBUG_BUFFERS_r( |
c3464db5 | 429 | PerlIO_printf(Perl_debug_log, |
b900a521 | 430 | " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n", |
f0ab9afb | 431 | (UV)paren, (IV)PL_regoffs[paren].start, |
b900a521 | 432 | (IV)(PL_reg_start_tmp[paren] - PL_bostr), |
f0ab9afb | 433 | (IV)PL_regoffs[paren].end, |
3280af22 | 434 | (paren > *PL_reglastparen ? "(no)" : "")); |
c277df42 | 435 | ); |
a0d0e21e | 436 | } |
e7707071 | 437 | DEBUG_BUFFERS_r( |
bb7a0f54 | 438 | if (*PL_reglastparen + 1 <= rex->nparens) { |
c3464db5 | 439 | PerlIO_printf(Perl_debug_log, |
faccc32b | 440 | " restoring \\%"IVdf"..\\%"IVdf" to undef\n", |
4f639d21 | 441 | (IV)(*PL_reglastparen + 1), (IV)rex->nparens); |
c277df42 IZ |
442 | } |
443 | ); | |
daf18116 | 444 | #if 1 |
dafc8851 JH |
445 | /* It would seem that the similar code in regtry() |
446 | * already takes care of this, and in fact it is in | |
447 | * a better location to since this code can #if 0-ed out | |
448 | * but the code in regtry() is needed or otherwise tests | |
449 | * requiring null fields (pat.t#187 and split.t#{13,14} | |
daf18116 JH |
450 | * (as of patchlevel 7877) will fail. Then again, |
451 | * this code seems to be necessary or otherwise | |
225593e1 DM |
452 | * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/ |
453 | * --jhi updated by dapm */ | |
3b6647e0 | 454 | for (i = *PL_reglastparen + 1; i <= rex->nparens; i++) { |
097eb12c | 455 | if (i > PL_regsize) |
f0ab9afb NC |
456 | PL_regoffs[i].start = -1; |
457 | PL_regoffs[i].end = -1; | |
a0d0e21e | 458 | } |
dafc8851 | 459 | #endif |
a0d0e21e LW |
460 | return input; |
461 | } | |
462 | ||
02db2b7b | 463 | #define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */ |
a0d0e21e | 464 | |
a687059c | 465 | /* |
e50aee73 | 466 | * pregexec and friends |
a687059c LW |
467 | */ |
468 | ||
76234dfb | 469 | #ifndef PERL_IN_XSUB_RE |
a687059c | 470 | /* |
c277df42 | 471 | - pregexec - match a regexp against a string |
a687059c | 472 | */ |
c277df42 | 473 | I32 |
49d7dfbc | 474 | Perl_pregexec(pTHX_ REGEXP * const prog, char* stringarg, register char *strend, |
c3464db5 | 475 | char *strbeg, I32 minend, SV *screamer, U32 nosave) |
c277df42 IZ |
476 | /* strend: pointer to null at end of string */ |
477 | /* strbeg: real beginning of string */ | |
478 | /* minend: end of match must be >=minend after stringarg. */ | |
479 | /* nosave: For optimizations. */ | |
480 | { | |
7918f24d NC |
481 | PERL_ARGS_ASSERT_PREGEXEC; |
482 | ||
c277df42 | 483 | return |
9041c2e3 | 484 | regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL, |
c277df42 IZ |
485 | nosave ? 0 : REXEC_COPY_STR); |
486 | } | |
76234dfb | 487 | #endif |
22e551b9 | 488 | |
9041c2e3 | 489 | /* |
cad2e5aa JH |
490 | * Need to implement the following flags for reg_anch: |
491 | * | |
492 | * USE_INTUIT_NOML - Useful to call re_intuit_start() first | |
493 | * USE_INTUIT_ML | |
494 | * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer | |
495 | * INTUIT_AUTORITATIVE_ML | |
496 | * INTUIT_ONCE_NOML - Intuit can match in one location only. | |
497 | * INTUIT_ONCE_ML | |
498 | * | |
499 | * Another flag for this function: SECOND_TIME (so that float substrs | |
500 | * with giant delta may be not rechecked). | |
501 | */ | |
502 | ||
503 | /* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */ | |
504 | ||
3f7c398e | 505 | /* If SCREAM, then SvPVX_const(sv) should be compatible with strpos and strend. |
cad2e5aa JH |
506 | Otherwise, only SvCUR(sv) is used to get strbeg. */ |
507 | ||
508 | /* XXXX We assume that strpos is strbeg unless sv. */ | |
509 | ||
6eb5f6b9 JH |
510 | /* XXXX Some places assume that there is a fixed substring. |
511 | An update may be needed if optimizer marks as "INTUITable" | |
512 | RExen without fixed substrings. Similarly, it is assumed that | |
513 | lengths of all the strings are no more than minlen, thus they | |
514 | cannot come from lookahead. | |
40d049e4 YO |
515 | (Or minlen should take into account lookahead.) |
516 | NOTE: Some of this comment is not correct. minlen does now take account | |
517 | of lookahead/behind. Further research is required. -- demerphq | |
518 | ||
519 | */ | |
6eb5f6b9 | 520 | |
2c2d71f5 JH |
521 | /* A failure to find a constant substring means that there is no need to make |
522 | an expensive call to REx engine, thus we celebrate a failure. Similarly, | |
523 | finding a substring too deep into the string means that less calls to | |
30944b6d IZ |
524 | regtry() should be needed. |
525 | ||
526 | REx compiler's optimizer found 4 possible hints: | |
527 | a) Anchored substring; | |
528 | b) Fixed substring; | |
529 | c) Whether we are anchored (beginning-of-line or \G); | |
530 | d) First node (of those at offset 0) which may distingush positions; | |
6eb5f6b9 | 531 | We use a)b)d) and multiline-part of c), and try to find a position in the |
30944b6d IZ |
532 | string which does not contradict any of them. |
533 | */ | |
2c2d71f5 | 534 | |
6eb5f6b9 JH |
535 | /* Most of decisions we do here should have been done at compile time. |
536 | The nodes of the REx which we used for the search should have been | |
537 | deleted from the finite automaton. */ | |
538 | ||
cad2e5aa | 539 | char * |
288b8c02 | 540 | Perl_re_intuit_start(pTHX_ REGEXP * const rx, SV *sv, char *strpos, |
9f61653a | 541 | char *strend, const U32 flags, re_scream_pos_data *data) |
cad2e5aa | 542 | { |
97aff369 | 543 | dVAR; |
288b8c02 | 544 | struct regexp *const prog = (struct regexp *)SvANY(rx); |
b7953727 | 545 | register I32 start_shift = 0; |
cad2e5aa | 546 | /* Should be nonnegative! */ |
b7953727 | 547 | register I32 end_shift = 0; |
2c2d71f5 JH |
548 | register char *s; |
549 | register SV *check; | |
a1933d95 | 550 | char *strbeg; |
cad2e5aa | 551 | char *t; |
f2ed9b32 | 552 | const bool utf8_target = (sv && SvUTF8(sv)) ? 1 : 0; /* if no sv we have to assume bytes */ |
cad2e5aa | 553 | I32 ml_anch; |
bd61b366 SS |
554 | register char *other_last = NULL; /* other substr checked before this */ |
555 | char *check_at = NULL; /* check substr found at this pos */ | |
bbe252da | 556 | const I32 multiline = prog->extflags & RXf_PMf_MULTILINE; |
f8fc2ecf | 557 | RXi_GET_DECL(prog,progi); |
30944b6d | 558 | #ifdef DEBUGGING |
890ce7af | 559 | const char * const i_strpos = strpos; |
30944b6d | 560 | #endif |
a3621e74 YO |
561 | GET_RE_DEBUG_FLAGS_DECL; |
562 | ||
7918f24d NC |
563 | PERL_ARGS_ASSERT_RE_INTUIT_START; |
564 | ||
f2ed9b32 | 565 | RX_MATCH_UTF8_set(rx,utf8_target); |
cad2e5aa | 566 | |
3c8556c3 | 567 | if (RX_UTF8(rx)) { |
b8d68ded JH |
568 | PL_reg_flags |= RF_utf8; |
569 | } | |
ab3bbdeb | 570 | DEBUG_EXECUTE_r( |
f2ed9b32 | 571 | debug_start_match(rx, utf8_target, strpos, strend, |
1de06328 YO |
572 | sv ? "Guessing start of match in sv for" |
573 | : "Guessing start of match in string for"); | |
2a782b5b | 574 | ); |
cad2e5aa | 575 | |
c344f387 JH |
576 | /* CHR_DIST() would be more correct here but it makes things slow. */ |
577 | if (prog->minlen > strend - strpos) { | |
a3621e74 | 578 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
a72c7584 | 579 | "String too short... [re_intuit_start]\n")); |
cad2e5aa | 580 | goto fail; |
2c2d71f5 | 581 | } |
1de06328 | 582 | |
a1933d95 | 583 | strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos; |
1aa99e6b | 584 | PL_regeol = strend; |
f2ed9b32 | 585 | if (utf8_target) { |
33b8afdf JH |
586 | if (!prog->check_utf8 && prog->check_substr) |
587 | to_utf8_substr(prog); | |
588 | check = prog->check_utf8; | |
589 | } else { | |
590 | if (!prog->check_substr && prog->check_utf8) | |
591 | to_byte_substr(prog); | |
592 | check = prog->check_substr; | |
593 | } | |
1de06328 | 594 | if (check == &PL_sv_undef) { |
a3621e74 | 595 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
1de06328 | 596 | "Non-utf8 string cannot match utf8 check string\n")); |
33b8afdf JH |
597 | goto fail; |
598 | } | |
bbe252da YO |
599 | if (prog->extflags & RXf_ANCH) { /* Match at beg-of-str or after \n */ |
600 | ml_anch = !( (prog->extflags & RXf_ANCH_SINGLE) | |
601 | || ( (prog->extflags & RXf_ANCH_BOL) | |
7fba1cd6 | 602 | && !multiline ) ); /* Check after \n? */ |
cad2e5aa | 603 | |
7e25d62c | 604 | if (!ml_anch) { |
bbe252da YO |
605 | if ( !(prog->extflags & RXf_ANCH_GPOS) /* Checked by the caller */ |
606 | && !(prog->intflags & PREGf_IMPLICIT) /* not a real BOL */ | |
3f7c398e | 607 | /* SvCUR is not set on references: SvRV and SvPVX_const overlap */ |
7e25d62c JH |
608 | && sv && !SvROK(sv) |
609 | && (strpos != strbeg)) { | |
a3621e74 | 610 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not at start...\n")); |
7e25d62c JH |
611 | goto fail; |
612 | } | |
613 | if (prog->check_offset_min == prog->check_offset_max && | |
bbe252da | 614 | !(prog->extflags & RXf_CANY_SEEN)) { |
2c2d71f5 | 615 | /* Substring at constant offset from beg-of-str... */ |
cad2e5aa JH |
616 | I32 slen; |
617 | ||
1aa99e6b | 618 | s = HOP3c(strpos, prog->check_offset_min, strend); |
1de06328 | 619 | |
653099ff GS |
620 | if (SvTAIL(check)) { |
621 | slen = SvCUR(check); /* >= 1 */ | |
cad2e5aa | 622 | |
9041c2e3 | 623 | if ( strend - s > slen || strend - s < slen - 1 |
2c2d71f5 | 624 | || (strend - s == slen && strend[-1] != '\n')) { |
a3621e74 | 625 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String too long...\n")); |
2c2d71f5 | 626 | goto fail_finish; |
cad2e5aa JH |
627 | } |
628 | /* Now should match s[0..slen-2] */ | |
629 | slen--; | |
3f7c398e | 630 | if (slen && (*SvPVX_const(check) != *s |
cad2e5aa | 631 | || (slen > 1 |
3f7c398e | 632 | && memNE(SvPVX_const(check), s, slen)))) { |
2c2d71f5 | 633 | report_neq: |
a3621e74 | 634 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String not equal...\n")); |
2c2d71f5 JH |
635 | goto fail_finish; |
636 | } | |
cad2e5aa | 637 | } |
3f7c398e | 638 | else if (*SvPVX_const(check) != *s |
653099ff | 639 | || ((slen = SvCUR(check)) > 1 |
3f7c398e | 640 | && memNE(SvPVX_const(check), s, slen))) |
2c2d71f5 | 641 | goto report_neq; |
c315bfe8 | 642 | check_at = s; |
2c2d71f5 | 643 | goto success_at_start; |
7e25d62c | 644 | } |
cad2e5aa | 645 | } |
2c2d71f5 | 646 | /* Match is anchored, but substr is not anchored wrt beg-of-str. */ |
cad2e5aa | 647 | s = strpos; |
2c2d71f5 | 648 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
1de06328 YO |
649 | end_shift = prog->check_end_shift; |
650 | ||
2c2d71f5 | 651 | if (!ml_anch) { |
a3b680e6 | 652 | const I32 end = prog->check_offset_max + CHR_SVLEN(check) |
653099ff | 653 | - (SvTAIL(check) != 0); |
a3b680e6 | 654 | const I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end; |
2c2d71f5 JH |
655 | |
656 | if (end_shift < eshift) | |
657 | end_shift = eshift; | |
658 | } | |
cad2e5aa | 659 | } |
2c2d71f5 | 660 | else { /* Can match at random position */ |
cad2e5aa JH |
661 | ml_anch = 0; |
662 | s = strpos; | |
1de06328 YO |
663 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
664 | end_shift = prog->check_end_shift; | |
665 | ||
666 | /* end shift should be non negative here */ | |
cad2e5aa JH |
667 | } |
668 | ||
bcdf7404 | 669 | #ifdef QDEBUGGING /* 7/99: reports of failure (with the older version) */ |
0033605d | 670 | if (end_shift < 0) |
1de06328 | 671 | Perl_croak(aTHX_ "panic: end_shift: %"IVdf" pattern:\n%s\n ", |
220fc49f | 672 | (IV)end_shift, RX_PRECOMP(prog)); |
2c2d71f5 JH |
673 | #endif |
674 | ||
2c2d71f5 JH |
675 | restart: |
676 | /* Find a possible match in the region s..strend by looking for | |
677 | the "check" substring in the region corrected by start/end_shift. */ | |
1de06328 YO |
678 | |
679 | { | |
680 | I32 srch_start_shift = start_shift; | |
681 | I32 srch_end_shift = end_shift; | |
682 | if (srch_start_shift < 0 && strbeg - s > srch_start_shift) { | |
683 | srch_end_shift -= ((strbeg - s) - srch_start_shift); | |
684 | srch_start_shift = strbeg - s; | |
685 | } | |
6bda09f9 | 686 | DEBUG_OPTIMISE_MORE_r({ |
1de06328 YO |
687 | PerlIO_printf(Perl_debug_log, "Check offset min: %"IVdf" Start shift: %"IVdf" End shift %"IVdf" Real End Shift: %"IVdf"\n", |
688 | (IV)prog->check_offset_min, | |
689 | (IV)srch_start_shift, | |
690 | (IV)srch_end_shift, | |
691 | (IV)prog->check_end_shift); | |
692 | }); | |
693 | ||
cad2e5aa | 694 | if (flags & REXEC_SCREAM) { |
cad2e5aa | 695 | I32 p = -1; /* Internal iterator of scream. */ |
a3b680e6 | 696 | I32 * const pp = data ? data->scream_pos : &p; |
cad2e5aa | 697 | |
2c2d71f5 JH |
698 | if (PL_screamfirst[BmRARE(check)] >= 0 |
699 | || ( BmRARE(check) == '\n' | |
85c508c3 | 700 | && (BmPREVIOUS(check) == SvCUR(check) - 1) |
2c2d71f5 | 701 | && SvTAIL(check) )) |
9041c2e3 | 702 | s = screaminstr(sv, check, |
1de06328 | 703 | srch_start_shift + (s - strbeg), srch_end_shift, pp, 0); |
cad2e5aa | 704 | else |
2c2d71f5 | 705 | goto fail_finish; |
4addbd3b | 706 | /* we may be pointing at the wrong string */ |
07bc277f | 707 | if (s && RXp_MATCH_COPIED(prog)) |
3f7c398e | 708 | s = strbeg + (s - SvPVX_const(sv)); |
cad2e5aa JH |
709 | if (data) |
710 | *data->scream_olds = s; | |
711 | } | |
1de06328 YO |
712 | else { |
713 | U8* start_point; | |
714 | U8* end_point; | |
bbe252da | 715 | if (prog->extflags & RXf_CANY_SEEN) { |
1de06328 YO |
716 | start_point= (U8*)(s + srch_start_shift); |
717 | end_point= (U8*)(strend - srch_end_shift); | |
718 | } else { | |
719 | start_point= HOP3(s, srch_start_shift, srch_start_shift < 0 ? strbeg : strend); | |
720 | end_point= HOP3(strend, -srch_end_shift, strbeg); | |
721 | } | |
6bda09f9 | 722 | DEBUG_OPTIMISE_MORE_r({ |
56570a2c | 723 | PerlIO_printf(Perl_debug_log, "fbm_instr len=%d str=<%.*s>\n", |
1de06328 | 724 | (int)(end_point - start_point), |
fc8cd66c | 725 | (int)(end_point - start_point) > 20 ? 20 : (int)(end_point - start_point), |
1de06328 YO |
726 | start_point); |
727 | }); | |
728 | ||
729 | s = fbm_instr( start_point, end_point, | |
7fba1cd6 | 730 | check, multiline ? FBMrf_MULTILINE : 0); |
1de06328 YO |
731 | } |
732 | } | |
cad2e5aa JH |
733 | /* Update the count-of-usability, remove useless subpatterns, |
734 | unshift s. */ | |
2c2d71f5 | 735 | |
ab3bbdeb | 736 | DEBUG_EXECUTE_r({ |
f2ed9b32 | 737 | RE_PV_QUOTED_DECL(quoted, utf8_target, PERL_DEBUG_PAD_ZERO(0), |
ab3bbdeb YO |
738 | SvPVX_const(check), RE_SV_DUMPLEN(check), 30); |
739 | PerlIO_printf(Perl_debug_log, "%s %s substr %s%s%s", | |
2c2d71f5 | 740 | (s ? "Found" : "Did not find"), |
f2ed9b32 | 741 | (check == (utf8_target ? prog->anchored_utf8 : prog->anchored_substr) |
ab3bbdeb YO |
742 | ? "anchored" : "floating"), |
743 | quoted, | |
744 | RE_SV_TAIL(check), | |
745 | (s ? " at offset " : "...\n") ); | |
746 | }); | |
2c2d71f5 JH |
747 | |
748 | if (!s) | |
749 | goto fail_finish; | |
2c2d71f5 | 750 | /* Finish the diagnostic message */ |
a3621e74 | 751 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) ); |
2c2d71f5 | 752 | |
1de06328 YO |
753 | /* XXX dmq: first branch is for positive lookbehind... |
754 | Our check string is offset from the beginning of the pattern. | |
755 | So we need to do any stclass tests offset forward from that | |
756 | point. I think. :-( | |
757 | */ | |
758 | ||
759 | ||
760 | ||
761 | check_at=s; | |
762 | ||
763 | ||
2c2d71f5 JH |
764 | /* Got a candidate. Check MBOL anchoring, and the *other* substr. |
765 | Start with the other substr. | |
766 | XXXX no SCREAM optimization yet - and a very coarse implementation | |
a0288114 | 767 | XXXX /ttx+/ results in anchored="ttx", floating="x". floating will |
2c2d71f5 JH |
768 | *always* match. Probably should be marked during compile... |
769 | Probably it is right to do no SCREAM here... | |
770 | */ | |
771 | ||
f2ed9b32 | 772 | if (utf8_target ? (prog->float_utf8 && prog->anchored_utf8) |
1de06328 YO |
773 | : (prog->float_substr && prog->anchored_substr)) |
774 | { | |
30944b6d | 775 | /* Take into account the "other" substring. */ |
2c2d71f5 JH |
776 | /* XXXX May be hopelessly wrong for UTF... */ |
777 | if (!other_last) | |
6eb5f6b9 | 778 | other_last = strpos; |
f2ed9b32 | 779 | if (check == (utf8_target ? prog->float_utf8 : prog->float_substr)) { |
30944b6d IZ |
780 | do_other_anchored: |
781 | { | |
890ce7af AL |
782 | char * const last = HOP3c(s, -start_shift, strbeg); |
783 | char *last1, *last2; | |
be8e71aa | 784 | char * const saved_s = s; |
33b8afdf | 785 | SV* must; |
2c2d71f5 | 786 | |
2c2d71f5 JH |
787 | t = s - prog->check_offset_max; |
788 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ | |
f2ed9b32 | 789 | && (!utf8_target |
0ce71af7 | 790 | || ((t = (char*)reghopmaybe3((U8*)s, -(prog->check_offset_max), (U8*)strpos)) |
2c2d71f5 | 791 | && t > strpos))) |
6f207bd3 | 792 | NOOP; |
2c2d71f5 JH |
793 | else |
794 | t = strpos; | |
1aa99e6b | 795 | t = HOP3c(t, prog->anchored_offset, strend); |
6eb5f6b9 JH |
796 | if (t < other_last) /* These positions already checked */ |
797 | t = other_last; | |
1aa99e6b | 798 | last2 = last1 = HOP3c(strend, -prog->minlen, strbeg); |
2c2d71f5 JH |
799 | if (last < last1) |
800 | last1 = last; | |
1de06328 YO |
801 | /* XXXX It is not documented what units *_offsets are in. |
802 | We assume bytes, but this is clearly wrong. | |
803 | Meaning this code needs to be carefully reviewed for errors. | |
804 | dmq. | |
805 | */ | |
806 | ||
2c2d71f5 | 807 | /* On end-of-str: see comment below. */ |
f2ed9b32 | 808 | must = utf8_target ? prog->anchored_utf8 : prog->anchored_substr; |
33b8afdf JH |
809 | if (must == &PL_sv_undef) { |
810 | s = (char*)NULL; | |
1de06328 | 811 | DEBUG_r(must = prog->anchored_utf8); /* for debug */ |
33b8afdf JH |
812 | } |
813 | else | |
814 | s = fbm_instr( | |
815 | (unsigned char*)t, | |
816 | HOP3(HOP3(last1, prog->anchored_offset, strend) | |
817 | + SvCUR(must), -(SvTAIL(must)!=0), strbeg), | |
818 | must, | |
7fba1cd6 | 819 | multiline ? FBMrf_MULTILINE : 0 |
33b8afdf | 820 | ); |
ab3bbdeb | 821 | DEBUG_EXECUTE_r({ |
f2ed9b32 | 822 | RE_PV_QUOTED_DECL(quoted, utf8_target, PERL_DEBUG_PAD_ZERO(0), |
ab3bbdeb YO |
823 | SvPVX_const(must), RE_SV_DUMPLEN(must), 30); |
824 | PerlIO_printf(Perl_debug_log, "%s anchored substr %s%s", | |
2c2d71f5 | 825 | (s ? "Found" : "Contradicts"), |
ab3bbdeb YO |
826 | quoted, RE_SV_TAIL(must)); |
827 | }); | |
828 | ||
829 | ||
2c2d71f5 JH |
830 | if (!s) { |
831 | if (last1 >= last2) { | |
a3621e74 | 832 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
2c2d71f5 JH |
833 | ", giving up...\n")); |
834 | goto fail_finish; | |
835 | } | |
a3621e74 | 836 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
2c2d71f5 | 837 | ", trying floating at offset %ld...\n", |
be8e71aa | 838 | (long)(HOP3c(saved_s, 1, strend) - i_strpos))); |
1aa99e6b IH |
839 | other_last = HOP3c(last1, prog->anchored_offset+1, strend); |
840 | s = HOP3c(last, 1, strend); | |
2c2d71f5 JH |
841 | goto restart; |
842 | } | |
843 | else { | |
a3621e74 | 844 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", |
30944b6d | 845 | (long)(s - i_strpos))); |
1aa99e6b IH |
846 | t = HOP3c(s, -prog->anchored_offset, strbeg); |
847 | other_last = HOP3c(s, 1, strend); | |
be8e71aa | 848 | s = saved_s; |
2c2d71f5 JH |
849 | if (t == strpos) |
850 | goto try_at_start; | |
2c2d71f5 JH |
851 | goto try_at_offset; |
852 | } | |
30944b6d | 853 | } |
2c2d71f5 JH |
854 | } |
855 | else { /* Take into account the floating substring. */ | |
33b8afdf | 856 | char *last, *last1; |
be8e71aa | 857 | char * const saved_s = s; |
33b8afdf JH |
858 | SV* must; |
859 | ||
860 | t = HOP3c(s, -start_shift, strbeg); | |
861 | last1 = last = | |
862 | HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg); | |
863 | if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset) | |
864 | last = HOP3c(t, prog->float_max_offset, strend); | |
865 | s = HOP3c(t, prog->float_min_offset, strend); | |
866 | if (s < other_last) | |
867 | s = other_last; | |
2c2d71f5 | 868 | /* XXXX It is not documented what units *_offsets are in. Assume bytes. */ |
f2ed9b32 | 869 | must = utf8_target ? prog->float_utf8 : prog->float_substr; |
33b8afdf JH |
870 | /* fbm_instr() takes into account exact value of end-of-str |
871 | if the check is SvTAIL(ed). Since false positives are OK, | |
872 | and end-of-str is not later than strend we are OK. */ | |
873 | if (must == &PL_sv_undef) { | |
874 | s = (char*)NULL; | |
1de06328 | 875 | DEBUG_r(must = prog->float_utf8); /* for debug message */ |
33b8afdf JH |
876 | } |
877 | else | |
2c2d71f5 | 878 | s = fbm_instr((unsigned char*)s, |
33b8afdf JH |
879 | (unsigned char*)last + SvCUR(must) |
880 | - (SvTAIL(must)!=0), | |
7fba1cd6 | 881 | must, multiline ? FBMrf_MULTILINE : 0); |
ab3bbdeb | 882 | DEBUG_EXECUTE_r({ |
f2ed9b32 | 883 | RE_PV_QUOTED_DECL(quoted, utf8_target, PERL_DEBUG_PAD_ZERO(0), |
ab3bbdeb YO |
884 | SvPVX_const(must), RE_SV_DUMPLEN(must), 30); |
885 | PerlIO_printf(Perl_debug_log, "%s floating substr %s%s", | |
33b8afdf | 886 | (s ? "Found" : "Contradicts"), |
ab3bbdeb YO |
887 | quoted, RE_SV_TAIL(must)); |
888 | }); | |
33b8afdf JH |
889 | if (!s) { |
890 | if (last1 == last) { | |
a3621e74 | 891 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
33b8afdf JH |
892 | ", giving up...\n")); |
893 | goto fail_finish; | |
2c2d71f5 | 894 | } |
a3621e74 | 895 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
33b8afdf | 896 | ", trying anchored starting at offset %ld...\n", |
be8e71aa | 897 | (long)(saved_s + 1 - i_strpos))); |
33b8afdf JH |
898 | other_last = last; |
899 | s = HOP3c(t, 1, strend); | |
900 | goto restart; | |
901 | } | |
902 | else { | |
a3621e74 | 903 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", |
33b8afdf JH |
904 | (long)(s - i_strpos))); |
905 | other_last = s; /* Fix this later. --Hugo */ | |
be8e71aa | 906 | s = saved_s; |
33b8afdf JH |
907 | if (t == strpos) |
908 | goto try_at_start; | |
909 | goto try_at_offset; | |
910 | } | |
2c2d71f5 | 911 | } |
cad2e5aa | 912 | } |
2c2d71f5 | 913 | |
1de06328 | 914 | |
9ef43ace | 915 | t= (char*)HOP3( s, -prog->check_offset_max, (prog->check_offset_max<0) ? strend : strpos); |
1de06328 | 916 | |
6bda09f9 | 917 | DEBUG_OPTIMISE_MORE_r( |
1de06328 YO |
918 | PerlIO_printf(Perl_debug_log, |
919 | "Check offset min:%"IVdf" max:%"IVdf" S:%"IVdf" t:%"IVdf" D:%"IVdf" end:%"IVdf"\n", | |
920 | (IV)prog->check_offset_min, | |
921 | (IV)prog->check_offset_max, | |
922 | (IV)(s-strpos), | |
923 | (IV)(t-strpos), | |
924 | (IV)(t-s), | |
925 | (IV)(strend-strpos) | |
926 | ) | |
927 | ); | |
928 | ||
2c2d71f5 | 929 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ |
f2ed9b32 | 930 | && (!utf8_target |
9ef43ace | 931 | || ((t = (char*)reghopmaybe3((U8*)s, -prog->check_offset_max, (U8*) ((prog->check_offset_max<0) ? strend : strpos))) |
1de06328 YO |
932 | && t > strpos))) |
933 | { | |
2c2d71f5 JH |
934 | /* Fixed substring is found far enough so that the match |
935 | cannot start at strpos. */ | |
936 | try_at_offset: | |
cad2e5aa | 937 | if (ml_anch && t[-1] != '\n') { |
30944b6d IZ |
938 | /* Eventually fbm_*() should handle this, but often |
939 | anchored_offset is not 0, so this check will not be wasted. */ | |
940 | /* XXXX In the code below we prefer to look for "^" even in | |
941 | presence of anchored substrings. And we search even | |
942 | beyond the found float position. These pessimizations | |
943 | are historical artefacts only. */ | |
944 | find_anchor: | |
2c2d71f5 | 945 | while (t < strend - prog->minlen) { |
cad2e5aa | 946 | if (*t == '\n') { |
4ee3650e | 947 | if (t < check_at - prog->check_offset_min) { |
f2ed9b32 | 948 | if (utf8_target ? prog->anchored_utf8 : prog->anchored_substr) { |
4ee3650e GS |
949 | /* Since we moved from the found position, |
950 | we definitely contradict the found anchored | |
30944b6d IZ |
951 | substr. Due to the above check we do not |
952 | contradict "check" substr. | |
953 | Thus we can arrive here only if check substr | |
954 | is float. Redo checking for "other"=="fixed". | |
955 | */ | |
9041c2e3 | 956 | strpos = t + 1; |
a3621e74 | 957 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n", |
e4584336 | 958 | PL_colors[0], PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset))); |
30944b6d IZ |
959 | goto do_other_anchored; |
960 | } | |
4ee3650e GS |
961 | /* We don't contradict the found floating substring. */ |
962 | /* XXXX Why not check for STCLASS? */ | |
cad2e5aa | 963 | s = t + 1; |
a3621e74 | 964 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n", |
e4584336 | 965 | PL_colors[0], PL_colors[1], (long)(s - i_strpos))); |
cad2e5aa JH |
966 | goto set_useful; |
967 | } | |
4ee3650e GS |
968 | /* Position contradicts check-string */ |
969 | /* XXXX probably better to look for check-string | |
970 | than for "\n", so one should lower the limit for t? */ | |
a3621e74 | 971 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n", |
e4584336 | 972 | PL_colors[0], PL_colors[1], (long)(t + 1 - i_strpos))); |
0e41cd87 | 973 | other_last = strpos = s = t + 1; |
cad2e5aa JH |
974 | goto restart; |
975 | } | |
976 | t++; | |
977 | } | |
a3621e74 | 978 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n", |
e4584336 | 979 | PL_colors[0], PL_colors[1])); |
2c2d71f5 | 980 | goto fail_finish; |
cad2e5aa | 981 | } |
f5952150 | 982 | else { |
a3621e74 | 983 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n", |
e4584336 | 984 | PL_colors[0], PL_colors[1])); |
f5952150 | 985 | } |
cad2e5aa JH |
986 | s = t; |
987 | set_useful: | |
f2ed9b32 | 988 | ++BmUSEFUL(utf8_target ? prog->check_utf8 : prog->check_substr); /* hooray/5 */ |
cad2e5aa JH |
989 | } |
990 | else { | |
f5952150 | 991 | /* The found string does not prohibit matching at strpos, |
2c2d71f5 | 992 | - no optimization of calling REx engine can be performed, |
f5952150 GS |
993 | unless it was an MBOL and we are not after MBOL, |
994 | or a future STCLASS check will fail this. */ | |
2c2d71f5 JH |
995 | try_at_start: |
996 | /* Even in this situation we may use MBOL flag if strpos is offset | |
997 | wrt the start of the string. */ | |
05b4157f | 998 | if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */ |
a1933d95 | 999 | && (strpos != strbeg) && strpos[-1] != '\n' |
d506a20d | 1000 | /* May be due to an implicit anchor of m{.*foo} */ |
bbe252da | 1001 | && !(prog->intflags & PREGf_IMPLICIT)) |
d506a20d | 1002 | { |
cad2e5aa JH |
1003 | t = strpos; |
1004 | goto find_anchor; | |
1005 | } | |
a3621e74 | 1006 | DEBUG_EXECUTE_r( if (ml_anch) |
f5952150 | 1007 | PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n", |
70685ca0 | 1008 | (long)(strpos - i_strpos), PL_colors[0], PL_colors[1]); |
30944b6d | 1009 | ); |
2c2d71f5 | 1010 | success_at_start: |
bbe252da | 1011 | if (!(prog->intflags & PREGf_NAUGHTY) /* XXXX If strpos moved? */ |
f2ed9b32 | 1012 | && (utf8_target ? ( |
33b8afdf JH |
1013 | prog->check_utf8 /* Could be deleted already */ |
1014 | && --BmUSEFUL(prog->check_utf8) < 0 | |
1015 | && (prog->check_utf8 == prog->float_utf8) | |
1016 | ) : ( | |
1017 | prog->check_substr /* Could be deleted already */ | |
1018 | && --BmUSEFUL(prog->check_substr) < 0 | |
1019 | && (prog->check_substr == prog->float_substr) | |
1020 | ))) | |
66e933ab | 1021 | { |
cad2e5aa | 1022 | /* If flags & SOMETHING - do not do it many times on the same match */ |
a3621e74 | 1023 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n")); |
f2ed9b32 KW |
1024 | /* XXX Does the destruction order has to change with utf8_target? */ |
1025 | SvREFCNT_dec(utf8_target ? prog->check_utf8 : prog->check_substr); | |
1026 | SvREFCNT_dec(utf8_target ? prog->check_substr : prog->check_utf8); | |
a0714e2c SS |
1027 | prog->check_substr = prog->check_utf8 = NULL; /* disable */ |
1028 | prog->float_substr = prog->float_utf8 = NULL; /* clear */ | |
1029 | check = NULL; /* abort */ | |
cad2e5aa | 1030 | s = strpos; |
c9415951 YO |
1031 | /* XXXX If the check string was an implicit check MBOL, then we need to unset the relevent flag |
1032 | see http://bugs.activestate.com/show_bug.cgi?id=87173 */ | |
1033 | if (prog->intflags & PREGf_IMPLICIT) | |
1034 | prog->extflags &= ~RXf_ANCH_MBOL; | |
3cf5c195 IZ |
1035 | /* XXXX This is a remnant of the old implementation. It |
1036 | looks wasteful, since now INTUIT can use many | |
6eb5f6b9 | 1037 | other heuristics. */ |
bbe252da | 1038 | prog->extflags &= ~RXf_USE_INTUIT; |
c9415951 | 1039 | /* XXXX What other flags might need to be cleared in this branch? */ |
cad2e5aa JH |
1040 | } |
1041 | else | |
1042 | s = strpos; | |
1043 | } | |
1044 | ||
6eb5f6b9 JH |
1045 | /* Last resort... */ |
1046 | /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */ | |
1de06328 YO |
1047 | /* trie stclasses are too expensive to use here, we are better off to |
1048 | leave it to regmatch itself */ | |
f8fc2ecf | 1049 | if (progi->regstclass && PL_regkind[OP(progi->regstclass)]!=TRIE) { |
6eb5f6b9 JH |
1050 | /* minlen == 0 is possible if regstclass is \b or \B, |
1051 | and the fixed substr is ''$. | |
1052 | Since minlen is already taken into account, s+1 is before strend; | |
1053 | accidentally, minlen >= 1 guaranties no false positives at s + 1 | |
1054 | even for \b or \B. But (minlen? 1 : 0) below assumes that | |
1055 | regstclass does not come from lookahead... */ | |
1056 | /* If regstclass takes bytelength more than 1: If charlength==1, OK. | |
1057 | This leaves EXACTF only, which is dealt with in find_byclass(). */ | |
f8fc2ecf YO |
1058 | const U8* const str = (U8*)STRING(progi->regstclass); |
1059 | const int cl_l = (PL_regkind[OP(progi->regstclass)] == EXACT | |
1060 | ? CHR_DIST(str+STR_LEN(progi->regstclass), str) | |
66e933ab | 1061 | : 1); |
1de06328 YO |
1062 | char * endpos; |
1063 | if (prog->anchored_substr || prog->anchored_utf8 || ml_anch) | |
1064 | endpos= HOP3c(s, (prog->minlen ? cl_l : 0), strend); | |
1065 | else if (prog->float_substr || prog->float_utf8) | |
1066 | endpos= HOP3c(HOP3c(check_at, -start_shift, strbeg), cl_l, strend); | |
1067 | else | |
1068 | endpos= strend; | |
1069 | ||
70685ca0 JH |
1070 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %"IVdf" s: %"IVdf" endpos: %"IVdf"\n", |
1071 | (IV)start_shift, (IV)(check_at - strbeg), (IV)(s - strbeg), (IV)(endpos - strbeg))); | |
1de06328 | 1072 | |
6eb5f6b9 | 1073 | t = s; |
f8fc2ecf | 1074 | s = find_byclass(prog, progi->regstclass, s, endpos, NULL); |
6eb5f6b9 JH |
1075 | if (!s) { |
1076 | #ifdef DEBUGGING | |
cbbf8932 | 1077 | const char *what = NULL; |
6eb5f6b9 JH |
1078 | #endif |
1079 | if (endpos == strend) { | |
a3621e74 | 1080 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
6eb5f6b9 JH |
1081 | "Could not match STCLASS...\n") ); |
1082 | goto fail; | |
1083 | } | |
a3621e74 | 1084 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
66e933ab | 1085 | "This position contradicts STCLASS...\n") ); |
bbe252da | 1086 | if ((prog->extflags & RXf_ANCH) && !ml_anch) |
653099ff | 1087 | goto fail; |
6eb5f6b9 | 1088 | /* Contradict one of substrings */ |
33b8afdf | 1089 | if (prog->anchored_substr || prog->anchored_utf8) { |
f2ed9b32 | 1090 | if ((utf8_target ? prog->anchored_utf8 : prog->anchored_substr) == check) { |
a3621e74 | 1091 | DEBUG_EXECUTE_r( what = "anchored" ); |
6eb5f6b9 | 1092 | hop_and_restart: |
1aa99e6b | 1093 | s = HOP3c(t, 1, strend); |
66e933ab GS |
1094 | if (s + start_shift + end_shift > strend) { |
1095 | /* XXXX Should be taken into account earlier? */ | |
a3621e74 | 1096 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
66e933ab GS |
1097 | "Could not match STCLASS...\n") ); |
1098 | goto fail; | |
1099 | } | |
5e39e1e5 HS |
1100 | if (!check) |
1101 | goto giveup; | |
a3621e74 | 1102 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 1103 | "Looking for %s substr starting at offset %ld...\n", |
6eb5f6b9 JH |
1104 | what, (long)(s + start_shift - i_strpos)) ); |
1105 | goto restart; | |
1106 | } | |
66e933ab | 1107 | /* Have both, check_string is floating */ |
6eb5f6b9 JH |
1108 | if (t + start_shift >= check_at) /* Contradicts floating=check */ |
1109 | goto retry_floating_check; | |
1110 | /* Recheck anchored substring, but not floating... */ | |
9041c2e3 | 1111 | s = check_at; |
5e39e1e5 HS |
1112 | if (!check) |
1113 | goto giveup; | |
a3621e74 | 1114 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 1115 | "Looking for anchored substr starting at offset %ld...\n", |
6eb5f6b9 JH |
1116 | (long)(other_last - i_strpos)) ); |
1117 | goto do_other_anchored; | |
1118 | } | |
60e71179 GS |
1119 | /* Another way we could have checked stclass at the |
1120 | current position only: */ | |
1121 | if (ml_anch) { | |
1122 | s = t = t + 1; | |
5e39e1e5 HS |
1123 | if (!check) |
1124 | goto giveup; | |
a3621e74 | 1125 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 1126 | "Looking for /%s^%s/m starting at offset %ld...\n", |
e4584336 | 1127 | PL_colors[0], PL_colors[1], (long)(t - i_strpos)) ); |
60e71179 | 1128 | goto try_at_offset; |
66e933ab | 1129 | } |
f2ed9b32 | 1130 | if (!(utf8_target ? prog->float_utf8 : prog->float_substr)) /* Could have been deleted */ |
60e71179 | 1131 | goto fail; |
6eb5f6b9 JH |
1132 | /* Check is floating subtring. */ |
1133 | retry_floating_check: | |
1134 | t = check_at - start_shift; | |
a3621e74 | 1135 | DEBUG_EXECUTE_r( what = "floating" ); |
6eb5f6b9 JH |
1136 | goto hop_and_restart; |
1137 | } | |
b7953727 | 1138 | if (t != s) { |
a3621e74 | 1139 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
6eb5f6b9 | 1140 | "By STCLASS: moving %ld --> %ld\n", |
b7953727 JH |
1141 | (long)(t - i_strpos), (long)(s - i_strpos)) |
1142 | ); | |
1143 | } | |
1144 | else { | |
a3621e74 | 1145 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
b7953727 JH |
1146 | "Does not contradict STCLASS...\n"); |
1147 | ); | |
1148 | } | |
6eb5f6b9 | 1149 | } |
5e39e1e5 | 1150 | giveup: |
a3621e74 | 1151 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n", |
5e39e1e5 HS |
1152 | PL_colors[4], (check ? "Guessed" : "Giving up"), |
1153 | PL_colors[5], (long)(s - i_strpos)) ); | |
cad2e5aa | 1154 | return s; |
2c2d71f5 JH |
1155 | |
1156 | fail_finish: /* Substring not found */ | |
33b8afdf | 1157 | if (prog->check_substr || prog->check_utf8) /* could be removed already */ |
f2ed9b32 | 1158 | BmUSEFUL(utf8_target ? prog->check_utf8 : prog->check_substr) += 5; /* hooray */ |
cad2e5aa | 1159 | fail: |
a3621e74 | 1160 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n", |
e4584336 | 1161 | PL_colors[4], PL_colors[5])); |
bd61b366 | 1162 | return NULL; |
cad2e5aa | 1163 | } |
9661b544 | 1164 | |
a0a388a1 YO |
1165 | #define DECL_TRIE_TYPE(scan) \ |
1166 | const enum { trie_plain, trie_utf8, trie_utf8_fold, trie_latin_utf8_fold } \ | |
1167 | trie_type = (scan->flags != EXACT) \ | |
f2ed9b32 KW |
1168 | ? (utf8_target ? trie_utf8_fold : (UTF_PATTERN ? trie_latin_utf8_fold : trie_plain)) \ |
1169 | : (utf8_target ? trie_utf8 : trie_plain) | |
3b0527fe | 1170 | |
55eed653 NC |
1171 | #define REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, uscan, len, \ |
1172 | uvc, charid, foldlen, foldbuf, uniflags) STMT_START { \ | |
4cadc6a9 YO |
1173 | switch (trie_type) { \ |
1174 | case trie_utf8_fold: \ | |
1175 | if ( foldlen>0 ) { \ | |
0abd0d78 | 1176 | uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \ |
4cadc6a9 YO |
1177 | foldlen -= len; \ |
1178 | uscan += len; \ | |
1179 | len=0; \ | |
1180 | } else { \ | |
0abd0d78 | 1181 | uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \ |
4cadc6a9 YO |
1182 | uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \ |
1183 | foldlen -= UNISKIP( uvc ); \ | |
1184 | uscan = foldbuf + UNISKIP( uvc ); \ | |
1185 | } \ | |
1186 | break; \ | |
a0a388a1 YO |
1187 | case trie_latin_utf8_fold: \ |
1188 | if ( foldlen>0 ) { \ | |
1189 | uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \ | |
1190 | foldlen -= len; \ | |
1191 | uscan += len; \ | |
1192 | len=0; \ | |
1193 | } else { \ | |
1194 | len = 1; \ | |
1195 | uvc = to_uni_fold( *(U8*)uc, foldbuf, &foldlen ); \ | |
1196 | foldlen -= UNISKIP( uvc ); \ | |
1197 | uscan = foldbuf + UNISKIP( uvc ); \ | |
1198 | } \ | |
1199 | break; \ | |
4cadc6a9 YO |
1200 | case trie_utf8: \ |
1201 | uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \ | |
1202 | break; \ | |
1203 | case trie_plain: \ | |
1204 | uvc = (UV)*uc; \ | |
1205 | len = 1; \ | |
1206 | } \ | |
4cadc6a9 YO |
1207 | if (uvc < 256) { \ |
1208 | charid = trie->charmap[ uvc ]; \ | |
1209 | } \ | |
1210 | else { \ | |
1211 | charid = 0; \ | |
55eed653 NC |
1212 | if (widecharmap) { \ |
1213 | SV** const svpp = hv_fetch(widecharmap, \ | |
4cadc6a9 YO |
1214 | (char*)&uvc, sizeof(UV), 0); \ |
1215 | if (svpp) \ | |
1216 | charid = (U16)SvIV(*svpp); \ | |
1217 | } \ | |
1218 | } \ | |
1219 | } STMT_END | |
1220 | ||
a0a388a1 YO |
1221 | #define REXEC_FBC_EXACTISH_CHECK(CoNd) \ |
1222 | { \ | |
1223 | char *my_strend= (char *)strend; \ | |
4cadc6a9 YO |
1224 | if ( (CoNd) \ |
1225 | && (ln == len || \ | |
f2ed9b32 KW |
1226 | foldEQ_utf8(s, &my_strend, 0, utf8_target, \ |
1227 | m, NULL, ln, cBOOL(UTF_PATTERN))) \ | |
a0a388a1 | 1228 | && (!reginfo || regtry(reginfo, &s)) ) \ |
4cadc6a9 YO |
1229 | goto got_it; \ |
1230 | else { \ | |
1231 | U8 foldbuf[UTF8_MAXBYTES_CASE+1]; \ | |
1232 | uvchr_to_utf8(tmpbuf, c); \ | |
1233 | f = to_utf8_fold(tmpbuf, foldbuf, &foldlen); \ | |
1234 | if ( f != c \ | |
1235 | && (f == c1 || f == c2) \ | |
a0a388a1 | 1236 | && (ln == len || \ |
f2ed9b32 KW |
1237 | foldEQ_utf8(s, &my_strend, 0, utf8_target,\ |
1238 | m, NULL, ln, cBOOL(UTF_PATTERN)))\ | |
a0a388a1 | 1239 | && (!reginfo || regtry(reginfo, &s)) ) \ |
4cadc6a9 YO |
1240 | goto got_it; \ |
1241 | } \ | |
a0a388a1 YO |
1242 | } \ |
1243 | s += len | |
4cadc6a9 YO |
1244 | |
1245 | #define REXEC_FBC_EXACTISH_SCAN(CoNd) \ | |
1246 | STMT_START { \ | |
1247 | while (s <= e) { \ | |
1248 | if ( (CoNd) \ | |
4c1b470c KW |
1249 | && (ln == 1 || (OP(c) == EXACTF \ |
1250 | ? foldEQ(s, m, ln) \ | |
1251 | : foldEQ_locale(s, m, ln))) \ | |
24b23f37 | 1252 | && (!reginfo || regtry(reginfo, &s)) ) \ |
4cadc6a9 YO |
1253 | goto got_it; \ |
1254 | s++; \ | |
1255 | } \ | |
1256 | } STMT_END | |
1257 | ||
1258 | #define REXEC_FBC_UTF8_SCAN(CoDe) \ | |
1259 | STMT_START { \ | |
1260 | while (s + (uskip = UTF8SKIP(s)) <= strend) { \ | |
1261 | CoDe \ | |
1262 | s += uskip; \ | |
1263 | } \ | |
1264 | } STMT_END | |
1265 | ||
1266 | #define REXEC_FBC_SCAN(CoDe) \ | |
1267 | STMT_START { \ | |
1268 | while (s < strend) { \ | |
1269 | CoDe \ | |
1270 | s++; \ | |
1271 | } \ | |
1272 | } STMT_END | |
1273 | ||
1274 | #define REXEC_FBC_UTF8_CLASS_SCAN(CoNd) \ | |
1275 | REXEC_FBC_UTF8_SCAN( \ | |
1276 | if (CoNd) { \ | |
24b23f37 | 1277 | if (tmp && (!reginfo || regtry(reginfo, &s))) \ |
4cadc6a9 YO |
1278 | goto got_it; \ |
1279 | else \ | |
1280 | tmp = doevery; \ | |
1281 | } \ | |
1282 | else \ | |
1283 | tmp = 1; \ | |
1284 | ) | |
1285 | ||
1286 | #define REXEC_FBC_CLASS_SCAN(CoNd) \ | |
1287 | REXEC_FBC_SCAN( \ | |
1288 | if (CoNd) { \ | |
24b23f37 | 1289 | if (tmp && (!reginfo || regtry(reginfo, &s))) \ |
4cadc6a9 YO |
1290 | goto got_it; \ |
1291 | else \ | |
1292 | tmp = doevery; \ | |
1293 | } \ | |
1294 | else \ | |
1295 | tmp = 1; \ | |
1296 | ) | |
1297 | ||
1298 | #define REXEC_FBC_TRYIT \ | |
24b23f37 | 1299 | if ((!reginfo || regtry(reginfo, &s))) \ |
4cadc6a9 YO |
1300 | goto got_it |
1301 | ||
e1d1eefb | 1302 | #define REXEC_FBC_CSCAN(CoNdUtF8,CoNd) \ |
f2ed9b32 | 1303 | if (utf8_target) { \ |
e1d1eefb YO |
1304 | REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \ |
1305 | } \ | |
1306 | else { \ | |
1307 | REXEC_FBC_CLASS_SCAN(CoNd); \ | |
1308 | } \ | |
1309 | break | |
1310 | ||
4cadc6a9 | 1311 | #define REXEC_FBC_CSCAN_PRELOAD(UtFpReLoAd,CoNdUtF8,CoNd) \ |
f2ed9b32 | 1312 | if (utf8_target) { \ |
4cadc6a9 YO |
1313 | UtFpReLoAd; \ |
1314 | REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \ | |
1315 | } \ | |
1316 | else { \ | |
1317 | REXEC_FBC_CLASS_SCAN(CoNd); \ | |
1318 | } \ | |
1319 | break | |
1320 | ||
1321 | #define REXEC_FBC_CSCAN_TAINT(CoNdUtF8,CoNd) \ | |
1322 | PL_reg_flags |= RF_tainted; \ | |
f2ed9b32 | 1323 | if (utf8_target) { \ |
4cadc6a9 YO |
1324 | REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \ |
1325 | } \ | |
1326 | else { \ | |
1327 | REXEC_FBC_CLASS_SCAN(CoNd); \ | |
1328 | } \ | |
1329 | break | |
1330 | ||
786e8c11 YO |
1331 | #define DUMP_EXEC_POS(li,s,doutf8) \ |
1332 | dump_exec_pos(li,s,(PL_regeol),(PL_bostr),(PL_reg_starttry),doutf8) | |
1333 | ||
1334 | /* We know what class REx starts with. Try to find this position... */ | |
1335 | /* if reginfo is NULL, its a dryrun */ | |
1336 | /* annoyingly all the vars in this routine have different names from their counterparts | |
1337 | in regmatch. /grrr */ | |
1338 | ||
3c3eec57 | 1339 | STATIC char * |
07be1b83 | 1340 | S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s, |
24b23f37 | 1341 | const char *strend, regmatch_info *reginfo) |
a687059c | 1342 | { |
27da23d5 | 1343 | dVAR; |
bbe252da | 1344 | const I32 doevery = (prog->intflags & PREGf_SKIP) == 0; |
6eb5f6b9 | 1345 | char *m; |
d8093b23 | 1346 | STRLEN ln; |
5dab1207 | 1347 | STRLEN lnc; |
078c425b | 1348 | register STRLEN uskip; |
d8093b23 G |
1349 | unsigned int c1; |
1350 | unsigned int c2; | |
6eb5f6b9 JH |
1351 | char *e; |
1352 | register I32 tmp = 1; /* Scratch variable? */ | |
f2ed9b32 | 1353 | register const bool utf8_target = PL_reg_match_utf8; |
f8fc2ecf | 1354 | RXi_GET_DECL(prog,progi); |
7918f24d NC |
1355 | |
1356 | PERL_ARGS_ASSERT_FIND_BYCLASS; | |
f8fc2ecf | 1357 | |
6eb5f6b9 JH |
1358 | /* We know what class it must start with. */ |
1359 | switch (OP(c)) { | |
6eb5f6b9 | 1360 | case ANYOF: |
f2ed9b32 | 1361 | if (utf8_target) { |
4cadc6a9 | 1362 | REXEC_FBC_UTF8_CLASS_SCAN((ANYOF_FLAGS(c) & ANYOF_UNICODE) || |
388cc4de | 1363 | !UTF8_IS_INVARIANT((U8)s[0]) ? |
f2ed9b32 | 1364 | reginclass(prog, c, (U8*)s, 0, utf8_target) : |
4cadc6a9 | 1365 | REGINCLASS(prog, c, (U8*)s)); |
388cc4de HS |
1366 | } |
1367 | else { | |
1368 | while (s < strend) { | |
1369 | STRLEN skip = 1; | |
1370 | ||
32fc9b6a | 1371 | if (REGINCLASS(prog, c, (U8*)s) || |
388cc4de HS |
1372 | (ANYOF_FOLD_SHARP_S(c, s, strend) && |
1373 | /* The assignment of 2 is intentional: | |
1374 | * for the folded sharp s, the skip is 2. */ | |
1375 | (skip = SHARP_S_SKIP))) { | |
24b23f37 | 1376 | if (tmp && (!reginfo || regtry(reginfo, &s))) |
388cc4de HS |
1377 | goto got_it; |
1378 | else | |
1379 | tmp = doevery; | |
1380 | } | |
1381 | else | |
1382 | tmp = 1; | |
1383 | s += skip; | |
1384 | } | |
a0d0e21e | 1385 | } |
6eb5f6b9 | 1386 | break; |
f33976b4 | 1387 | case CANY: |
4cadc6a9 | 1388 | REXEC_FBC_SCAN( |
24b23f37 | 1389 | if (tmp && (!reginfo || regtry(reginfo, &s))) |
f33976b4 DB |
1390 | goto got_it; |
1391 | else | |
1392 | tmp = doevery; | |
4cadc6a9 | 1393 | ); |
f33976b4 | 1394 | break; |
6eb5f6b9 | 1395 | case EXACTF: |
5dab1207 NIS |
1396 | m = STRING(c); |
1397 | ln = STR_LEN(c); /* length to match in octets/bytes */ | |
1398 | lnc = (I32) ln; /* length to match in characters */ | |
f2ed9b32 | 1399 | if (UTF_PATTERN) { |
a2a2844f | 1400 | STRLEN ulen1, ulen2; |
5dab1207 | 1401 | U8 *sm = (U8 *) m; |
89ebb4a3 JH |
1402 | U8 tmpbuf1[UTF8_MAXBYTES_CASE+1]; |
1403 | U8 tmpbuf2[UTF8_MAXBYTES_CASE+1]; | |
97dc7d3e RGS |
1404 | /* used by commented-out code below */ |
1405 | /*const U32 uniflags = UTF8_ALLOW_DEFAULT;*/ | |
a0a388a1 YO |
1406 | |
1407 | /* XXX: Since the node will be case folded at compile | |
1408 | time this logic is a little odd, although im not | |
1409 | sure that its actually wrong. --dmq */ | |
1410 | ||
1411 | c1 = to_utf8_lower((U8*)m, tmpbuf1, &ulen1); | |
1412 | c2 = to_utf8_upper((U8*)m, tmpbuf2, &ulen2); | |
1413 | ||
1414 | /* XXX: This is kinda strange. to_utf8_XYZ returns the | |
1415 | codepoint of the first character in the converted | |
1416 | form, yet originally we did the extra step. | |
1417 | No tests fail by commenting this code out however | |
1418 | so Ive left it out. -- dmq. | |
1419 | ||
89ebb4a3 | 1420 | c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXBYTES_CASE, |
041457d9 | 1421 | 0, uniflags); |
89ebb4a3 | 1422 | c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXBYTES_CASE, |
041457d9 | 1423 | 0, uniflags); |
a0a388a1 YO |
1424 | */ |
1425 | ||
5dab1207 NIS |
1426 | lnc = 0; |
1427 | while (sm < ((U8 *) m + ln)) { | |
1428 | lnc++; | |
1429 | sm += UTF8SKIP(sm); | |
1430 | } | |
1aa99e6b IH |
1431 | } |
1432 | else { | |
1433 | c1 = *(U8*)m; | |
1434 | c2 = PL_fold[c1]; | |
1435 | } | |
6eb5f6b9 JH |
1436 | goto do_exactf; |
1437 | case EXACTFL: | |
5dab1207 NIS |
1438 | m = STRING(c); |
1439 | ln = STR_LEN(c); | |
1440 | lnc = (I32) ln; | |
d8093b23 | 1441 | c1 = *(U8*)m; |
6eb5f6b9 JH |
1442 | c2 = PL_fold_locale[c1]; |
1443 | do_exactf: | |
db12adc6 | 1444 | e = HOP3c(strend, -((I32)lnc), s); |
b3c9acc1 | 1445 | |
3b0527fe | 1446 | if (!reginfo && e < s) |
6eb5f6b9 | 1447 | e = s; /* Due to minlen logic of intuit() */ |
1aa99e6b | 1448 | |
60a8b682 JH |
1449 | /* The idea in the EXACTF* cases is to first find the |
1450 | * first character of the EXACTF* node and then, if | |
1451 | * necessary, case-insensitively compare the full | |
1452 | * text of the node. The c1 and c2 are the first | |
1453 | * characters (though in Unicode it gets a bit | |
1454 | * more complicated because there are more cases | |
7f16dd3d JH |
1455 | * than just upper and lower: one needs to use |
1456 | * the so-called folding case for case-insensitive | |
1457 | * matching (called "loose matching" in Unicode). | |
4c1b470c | 1458 | * foldEQ_utf8() will do just that. */ |
60a8b682 | 1459 | |
f2ed9b32 | 1460 | if (utf8_target || UTF_PATTERN) { |
575cac57 | 1461 | UV c, f; |
89ebb4a3 | 1462 | U8 tmpbuf [UTF8_MAXBYTES+1]; |
a0a388a1 YO |
1463 | STRLEN len = 1; |
1464 | STRLEN foldlen; | |
4ad0818d | 1465 | const U32 uniflags = UTF8_ALLOW_DEFAULT; |
09091399 | 1466 | if (c1 == c2) { |
5dab1207 NIS |
1467 | /* Upper and lower of 1st char are equal - |
1468 | * probably not a "letter". */ | |
1aa99e6b | 1469 | while (s <= e) { |
f2ed9b32 | 1470 | if (utf8_target) { |
a0a388a1 | 1471 | c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len, |
041457d9 | 1472 | uniflags); |
a0a388a1 YO |
1473 | } else { |
1474 | c = *((U8*)s); | |
1475 | } | |
4cadc6a9 | 1476 | REXEC_FBC_EXACTISH_CHECK(c == c1); |
1aa99e6b | 1477 | } |
09091399 JH |
1478 | } |
1479 | else { | |
1aa99e6b | 1480 | while (s <= e) { |
f2ed9b32 | 1481 | if (utf8_target) { |
a0a388a1 | 1482 | c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len, |
041457d9 | 1483 | uniflags); |
a0a388a1 YO |
1484 | } else { |
1485 | c = *((U8*)s); | |
1486 | } | |
80aecb99 | 1487 | |
60a8b682 | 1488 | /* Handle some of the three Greek sigmas cases. |
8c01da3c JH |
1489 | * Note that not all the possible combinations |
1490 | * are handled here: some of them are handled | |
1491 | * by the standard folding rules, and some of | |
1492 | * them (the character class or ANYOF cases) | |
1493 | * are handled during compiletime in | |
1494 | * regexec.c:S_regclass(). */ | |
880bd946 JH |
1495 | if (c == (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA || |
1496 | c == (UV)UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) | |
1497 | c = (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA; | |
80aecb99 | 1498 | |
4cadc6a9 | 1499 | REXEC_FBC_EXACTISH_CHECK(c == c1 || c == c2); |
1aa99e6b | 1500 | } |
09091399 | 1501 | } |
1aa99e6b IH |
1502 | } |
1503 | else { | |
a0a388a1 | 1504 | /* Neither pattern nor string are UTF8 */ |
1aa99e6b | 1505 | if (c1 == c2) |
4cadc6a9 | 1506 | REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1); |
1aa99e6b | 1507 | else |
4cadc6a9 | 1508 | REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1 || *(U8*)s == c2); |
b3c9acc1 IZ |
1509 | } |
1510 | break; | |
bbce6d69 | 1511 | case BOUNDL: |
3280af22 | 1512 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 1513 | /* FALL THROUGH */ |
a0d0e21e | 1514 | case BOUND: |
f2ed9b32 | 1515 | if (utf8_target) { |
12d33761 | 1516 | if (s == PL_bostr) |
ffc61ed2 JH |
1517 | tmp = '\n'; |
1518 | else { | |
6136c704 | 1519 | U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr); |
4ad0818d | 1520 | tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT); |
ffc61ed2 JH |
1521 | } |
1522 | tmp = ((OP(c) == BOUND ? | |
9041c2e3 | 1523 | isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0); |
1a4fad37 | 1524 | LOAD_UTF8_CHARCLASS_ALNUM(); |
4cadc6a9 | 1525 | REXEC_FBC_UTF8_SCAN( |
ffc61ed2 | 1526 | if (tmp == !(OP(c) == BOUND ? |
f2ed9b32 | 1527 | cBOOL(swash_fetch(PL_utf8_alnum, (U8*)s, utf8_target)) : |
ffc61ed2 JH |
1528 | isALNUM_LC_utf8((U8*)s))) |
1529 | { | |
1530 | tmp = !tmp; | |
4cadc6a9 | 1531 | REXEC_FBC_TRYIT; |
a687059c | 1532 | } |
4cadc6a9 | 1533 | ); |
a0d0e21e | 1534 | } |
a12cf05f | 1535 | else { /* Not utf8 */ |
12d33761 | 1536 | tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n'; |
a12cf05f KW |
1537 | tmp = cBOOL((OP(c) == BOUNDL) |
1538 | ? isALNUM_LC(tmp) | |
1539 | : (isWORDCHAR_L1(tmp) | |
1540 | && (isASCII(tmp) || (FLAGS(c) & USE_UNI)))); | |
4cadc6a9 | 1541 | REXEC_FBC_SCAN( |
ffc61ed2 | 1542 | if (tmp == |
a12cf05f KW |
1543 | !((OP(c) == BOUNDL) |
1544 | ? isALNUM_LC(*s) | |
1545 | : (isWORDCHAR_L1((U8) *s) | |
1546 | && (isASCII((U8) *s) || (FLAGS(c) & USE_UNI))))) | |
1547 | { | |
ffc61ed2 | 1548 | tmp = !tmp; |
4cadc6a9 | 1549 | REXEC_FBC_TRYIT; |
a0ed51b3 | 1550 | } |
4cadc6a9 | 1551 | ); |
a0ed51b3 | 1552 | } |
24b23f37 | 1553 | if ((!prog->minlen && tmp) && (!reginfo || regtry(reginfo, &s))) |
a0ed51b3 LW |
1554 | goto got_it; |
1555 | break; | |
bbce6d69 | 1556 | case NBOUNDL: |
3280af22 | 1557 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 1558 | /* FALL THROUGH */ |
a0d0e21e | 1559 | case NBOUND: |
f2ed9b32 | 1560 | if (utf8_target) { |
12d33761 | 1561 | if (s == PL_bostr) |
ffc61ed2 JH |
1562 | tmp = '\n'; |
1563 | else { | |
6136c704 | 1564 | U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr); |
4ad0818d | 1565 | tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT); |
ffc61ed2 JH |
1566 | } |
1567 | tmp = ((OP(c) == NBOUND ? | |
9041c2e3 | 1568 | isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0); |
1a4fad37 | 1569 | LOAD_UTF8_CHARCLASS_ALNUM(); |
4cadc6a9 | 1570 | REXEC_FBC_UTF8_SCAN( |
ffc61ed2 | 1571 | if (tmp == !(OP(c) == NBOUND ? |
f2ed9b32 | 1572 | cBOOL(swash_fetch(PL_utf8_alnum, (U8*)s, utf8_target)) : |
ffc61ed2 JH |
1573 | isALNUM_LC_utf8((U8*)s))) |
1574 | tmp = !tmp; | |
4cadc6a9 YO |
1575 | else REXEC_FBC_TRYIT; |
1576 | ); | |
a0d0e21e | 1577 | } |
667bb95a | 1578 | else { |
12d33761 | 1579 | tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n'; |
a12cf05f KW |
1580 | tmp = cBOOL((OP(c) == NBOUNDL) |
1581 | ? isALNUM_LC(tmp) | |
1582 | : (isWORDCHAR_L1(tmp) | |
1583 | && (isASCII(tmp) || (FLAGS(c) & USE_UNI)))); | |
4cadc6a9 | 1584 | REXEC_FBC_SCAN( |
a12cf05f KW |
1585 | if (tmp == ! cBOOL( |
1586 | (OP(c) == NBOUNDL) | |
1587 | ? isALNUM_LC(*s) | |
1588 | : (isWORDCHAR_L1((U8) *s) | |
1589 | && (isASCII((U8) *s) || (FLAGS(c) & USE_UNI))))) | |
1590 | { | |
ffc61ed2 | 1591 | tmp = !tmp; |
a12cf05f | 1592 | } |
4cadc6a9 YO |
1593 | else REXEC_FBC_TRYIT; |
1594 | ); | |
a0ed51b3 | 1595 | } |
24b23f37 | 1596 | if ((!prog->minlen && !tmp) && (!reginfo || regtry(reginfo, &s))) |
a0ed51b3 LW |
1597 | goto got_it; |
1598 | break; | |
a0d0e21e | 1599 | case ALNUM: |
4cadc6a9 | 1600 | REXEC_FBC_CSCAN_PRELOAD( |
d1eb3177 | 1601 | LOAD_UTF8_CHARCLASS_PERL_WORD(), |
f2ed9b32 | 1602 | swash_fetch(RE_utf8_perl_word, (U8*)s, utf8_target), |
a12cf05f | 1603 | (FLAGS(c) & USE_UNI) ? isWORDCHAR_L1((U8) *s) : isALNUM(*s) |
4cadc6a9 | 1604 | ); |
bbce6d69 | 1605 | case ALNUML: |
4cadc6a9 YO |
1606 | REXEC_FBC_CSCAN_TAINT( |
1607 | isALNUM_LC_utf8((U8*)s), | |
1608 | isALNUM_LC(*s) | |
1609 | ); | |
a0d0e21e | 1610 | case NALNUM: |
4cadc6a9 | 1611 | REXEC_FBC_CSCAN_PRELOAD( |
d1eb3177 | 1612 | LOAD_UTF8_CHARCLASS_PERL_WORD(), |
f2ed9b32 | 1613 | !swash_fetch(RE_utf8_perl_word, (U8*)s, utf8_target), |
a12cf05f | 1614 | ! ((FLAGS(c) & USE_UNI) ? isWORDCHAR_L1((U8) *s) : isALNUM(*s)) |
4cadc6a9 | 1615 | ); |
bbce6d69 | 1616 | case NALNUML: |
4cadc6a9 YO |
1617 | REXEC_FBC_CSCAN_TAINT( |
1618 | !isALNUM_LC_utf8((U8*)s), | |
1619 | !isALNUM_LC(*s) | |
1620 | ); | |
a0d0e21e | 1621 | case SPACE: |
4cadc6a9 | 1622 | REXEC_FBC_CSCAN_PRELOAD( |
d1eb3177 | 1623 | LOAD_UTF8_CHARCLASS_PERL_SPACE(), |
f2ed9b32 | 1624 | *s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, utf8_target), |
a12cf05f | 1625 | isSPACE_L1((U8) *s) && (isASCII((U8) *s) || (FLAGS(c) & USE_UNI)) |
4cadc6a9 | 1626 | ); |
bbce6d69 | 1627 | case SPACEL: |
4cadc6a9 YO |
1628 | REXEC_FBC_CSCAN_TAINT( |
1629 | *s == ' ' || isSPACE_LC_utf8((U8*)s), | |
1630 | isSPACE_LC(*s) | |
1631 | ); | |
a0d0e21e | 1632 | case NSPACE: |
4cadc6a9 | 1633 | REXEC_FBC_CSCAN_PRELOAD( |
d1eb3177 | 1634 | LOAD_UTF8_CHARCLASS_PERL_SPACE(), |
f2ed9b32 | 1635 | !(*s == ' ' || swash_fetch(RE_utf8_perl_space,(U8*)s, utf8_target)), |
a12cf05f | 1636 | !(isSPACE_L1((U8) *s) && (isASCII((U8) *s) || (FLAGS(c) & USE_UNI))) |
4cadc6a9 | 1637 | ); |
bbce6d69 | 1638 | case NSPACEL: |
4cadc6a9 YO |
1639 | REXEC_FBC_CSCAN_TAINT( |
1640 | !(*s == ' ' || isSPACE_LC_utf8((U8*)s)), | |
1641 | !isSPACE_LC(*s) | |
1642 | ); | |
a0d0e21e | 1643 | case DIGIT: |
4cadc6a9 | 1644 | REXEC_FBC_CSCAN_PRELOAD( |
d1eb3177 | 1645 | LOAD_UTF8_CHARCLASS_POSIX_DIGIT(), |
f2ed9b32 | 1646 | swash_fetch(RE_utf8_posix_digit,(U8*)s, utf8_target), |
4cadc6a9 YO |
1647 | isDIGIT(*s) |
1648 | ); | |
b8c5462f | 1649 | case DIGITL: |
4cadc6a9 YO |
1650 | REXEC_FBC_CSCAN_TAINT( |
1651 | isDIGIT_LC_utf8((U8*)s), | |
1652 | isDIGIT_LC(*s) | |
1653 | ); | |
a0d0e21e | 1654 | case NDIGIT: |
4cadc6a9 | 1655 | REXEC_FBC_CSCAN_PRELOAD( |
d1eb3177 | 1656 | LOAD_UTF8_CHARCLASS_POSIX_DIGIT(), |
f2ed9b32 | 1657 | !swash_fetch(RE_utf8_posix_digit,(U8*)s, utf8_target), |
4cadc6a9 YO |
1658 | !isDIGIT(*s) |
1659 | ); | |
b8c5462f | 1660 | case NDIGITL: |
4cadc6a9 YO |
1661 | REXEC_FBC_CSCAN_TAINT( |
1662 | !isDIGIT_LC_utf8((U8*)s), | |
1663 | !isDIGIT_LC(*s) | |
1664 | ); | |
e1d1eefb YO |
1665 | case LNBREAK: |
1666 | REXEC_FBC_CSCAN( | |
1667 | is_LNBREAK_utf8(s), | |
1668 | is_LNBREAK_latin1(s) | |
1669 | ); | |
1670 | case VERTWS: | |
1671 | REXEC_FBC_CSCAN( | |
1672 | is_VERTWS_utf8(s), | |
1673 | is_VERTWS_latin1(s) | |
1674 | ); | |
1675 | case NVERTWS: | |
1676 | REXEC_FBC_CSCAN( | |
1677 | !is_VERTWS_utf8(s), | |
1678 | !is_VERTWS_latin1(s) | |
1679 | ); | |
1680 | case HORIZWS: | |
1681 | REXEC_FBC_CSCAN( | |
1682 | is_HORIZWS_utf8(s), | |
1683 | is_HORIZWS_latin1(s) | |
1684 | ); | |
1685 | case NHORIZWS: | |
1686 | REXEC_FBC_CSCAN( | |
1687 | !is_HORIZWS_utf8(s), | |
1688 | !is_HORIZWS_latin1(s) | |
1689 | ); | |
1de06328 YO |
1690 | case AHOCORASICKC: |
1691 | case AHOCORASICK: | |
07be1b83 | 1692 | { |
a0a388a1 | 1693 | DECL_TRIE_TYPE(c); |
07be1b83 YO |
1694 | /* what trie are we using right now */ |
1695 | reg_ac_data *aho | |
f8fc2ecf | 1696 | = (reg_ac_data*)progi->data->data[ ARG( c ) ]; |
3251b653 NC |
1697 | reg_trie_data *trie |
1698 | = (reg_trie_data*)progi->data->data[ aho->trie ]; | |
85fbaab2 | 1699 | HV *widecharmap = MUTABLE_HV(progi->data->data[ aho->trie + 1 ]); |
07be1b83 YO |
1700 | |
1701 | const char *last_start = strend - trie->minlen; | |
6148ee25 | 1702 | #ifdef DEBUGGING |
07be1b83 | 1703 | const char *real_start = s; |
6148ee25 | 1704 | #endif |
07be1b83 | 1705 | STRLEN maxlen = trie->maxlen; |
be8e71aa YO |
1706 | SV *sv_points; |
1707 | U8 **points; /* map of where we were in the input string | |
786e8c11 | 1708 | when reading a given char. For ASCII this |
be8e71aa | 1709 | is unnecessary overhead as the relationship |
38a44b82 NC |
1710 | is always 1:1, but for Unicode, especially |
1711 | case folded Unicode this is not true. */ | |
f9e705e8 | 1712 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; |
786e8c11 YO |
1713 | U8 *bitmap=NULL; |
1714 | ||
07be1b83 YO |
1715 | |
1716 | GET_RE_DEBUG_FLAGS_DECL; | |
1717 | ||
be8e71aa YO |
1718 | /* We can't just allocate points here. We need to wrap it in |
1719 | * an SV so it gets freed properly if there is a croak while | |
1720 | * running the match */ | |
1721 | ENTER; | |
1722 | SAVETMPS; | |
1723 | sv_points=newSV(maxlen * sizeof(U8 *)); | |
1724 | SvCUR_set(sv_points, | |
1725 | maxlen * sizeof(U8 *)); | |
1726 | SvPOK_on(sv_points); | |
1727 | sv_2mortal(sv_points); | |
1728 | points=(U8**)SvPV_nolen(sv_points ); | |
1de06328 YO |
1729 | if ( trie_type != trie_utf8_fold |
1730 | && (trie->bitmap || OP(c)==AHOCORASICKC) ) | |
1731 | { | |
786e8c11 YO |
1732 | if (trie->bitmap) |
1733 | bitmap=(U8*)trie->bitmap; | |
1734 | else | |
1735 | bitmap=(U8*)ANYOF_BITMAP(c); | |
07be1b83 | 1736 | } |
786e8c11 YO |
1737 | /* this is the Aho-Corasick algorithm modified a touch |
1738 | to include special handling for long "unknown char" | |
1739 | sequences. The basic idea being that we use AC as long | |
1740 | as we are dealing with a possible matching char, when | |
1741 | we encounter an unknown char (and we have not encountered | |
1742 | an accepting state) we scan forward until we find a legal | |
1743 | starting char. | |
1744 | AC matching is basically that of trie matching, except | |
1745 | that when we encounter a failing transition, we fall back | |
1746 | to the current states "fail state", and try the current char | |
1747 | again, a process we repeat until we reach the root state, | |
1748 | state 1, or a legal transition. If we fail on the root state | |
1749 | then we can either terminate if we have reached an accepting | |
1750 | state previously, or restart the entire process from the beginning | |
1751 | if we have not. | |
1752 | ||
1753 | */ | |
07be1b83 YO |
1754 | while (s <= last_start) { |
1755 | const U32 uniflags = UTF8_ALLOW_DEFAULT; | |
1756 | U8 *uc = (U8*)s; | |
1757 | U16 charid = 0; | |
1758 | U32 base = 1; | |
1759 | U32 state = 1; | |
1760 | UV uvc = 0; | |
1761 | STRLEN len = 0; | |
1762 | STRLEN foldlen = 0; | |
1763 | U8 *uscan = (U8*)NULL; | |
1764 | U8 *leftmost = NULL; | |
786e8c11 YO |
1765 | #ifdef DEBUGGING |
1766 | U32 accepted_word= 0; | |
1767 | #endif | |
07be1b83 YO |
1768 | U32 pointpos = 0; |
1769 | ||
1770 | while ( state && uc <= (U8*)strend ) { | |
1771 | int failed=0; | |
786e8c11 YO |
1772 | U32 word = aho->states[ state ].wordnum; |
1773 | ||
1de06328 YO |
1774 | if( state==1 ) { |
1775 | if ( bitmap ) { | |
1776 | DEBUG_TRIE_EXECUTE_r( | |
1777 | if ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) { | |
1778 | dump_exec_pos( (char *)uc, c, strend, real_start, | |
f2ed9b32 | 1779 | (char *)uc, utf8_target ); |
1de06328 YO |
1780 | PerlIO_printf( Perl_debug_log, |
1781 | " Scanning for legal start char...\n"); | |
1782 | } | |
d085b490 YO |
1783 | ); |
1784 | if (utf8_target) { | |
1785 | while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) { | |
1786 | uc += UTF8SKIP(uc); | |
1787 | } | |
1788 | } else { | |
1789 | while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) { | |
1790 | uc++; | |
1791 | } | |
1792 | } | |
1de06328 | 1793 | s= (char *)uc; |
786e8c11 | 1794 | } |
786e8c11 YO |
1795 | if (uc >(U8*)last_start) break; |
1796 | } | |
1797 | ||
1798 | if ( word ) { | |
2e64971a | 1799 | U8 *lpos= points[ (pointpos - trie->wordinfo[word].len) % maxlen ]; |
786e8c11 YO |
1800 | if (!leftmost || lpos < leftmost) { |
1801 | DEBUG_r(accepted_word=word); | |
07be1b83 | 1802 | leftmost= lpos; |
786e8c11 | 1803 | } |
07be1b83 | 1804 | if (base==0) break; |
786e8c11 | 1805 | |
07be1b83 YO |
1806 | } |
1807 | points[pointpos++ % maxlen]= uc; | |
55eed653 NC |
1808 | REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, |
1809 | uscan, len, uvc, charid, foldlen, | |
1810 | foldbuf, uniflags); | |
786e8c11 YO |
1811 | DEBUG_TRIE_EXECUTE_r({ |
1812 | dump_exec_pos( (char *)uc, c, strend, real_start, | |
f2ed9b32 | 1813 | s, utf8_target ); |
07be1b83 | 1814 | PerlIO_printf(Perl_debug_log, |
786e8c11 YO |
1815 | " Charid:%3u CP:%4"UVxf" ", |
1816 | charid, uvc); | |
1817 | }); | |
07be1b83 YO |
1818 | |
1819 | do { | |
6148ee25 | 1820 | #ifdef DEBUGGING |
786e8c11 | 1821 | word = aho->states[ state ].wordnum; |
6148ee25 | 1822 | #endif |
07be1b83 YO |
1823 | base = aho->states[ state ].trans.base; |
1824 | ||
786e8c11 YO |
1825 | DEBUG_TRIE_EXECUTE_r({ |
1826 | if (failed) | |
1827 | dump_exec_pos( (char *)uc, c, strend, real_start, | |
f2ed9b32 | 1828 | s, utf8_target ); |
07be1b83 | 1829 | PerlIO_printf( Perl_debug_log, |
786e8c11 YO |
1830 | "%sState: %4"UVxf", word=%"UVxf, |
1831 | failed ? " Fail transition to " : "", | |
1832 | (UV)state, (UV)word); | |
1833 | }); | |
07be1b83 YO |
1834 | if ( base ) { |
1835 | U32 tmp; | |
6dd2be57 | 1836 | I32 offset; |
07be1b83 | 1837 | if (charid && |
6dd2be57 DM |
1838 | ( ((offset = base + charid |
1839 | - 1 - trie->uniquecharcount)) >= 0) | |
1840 | && ((U32)offset < trie->lasttrans) | |
1841 | && trie->trans[offset].check == state | |
1842 | && (tmp=trie->trans[offset].next)) | |
07be1b83 | 1843 | { |
786e8c11 YO |
1844 | DEBUG_TRIE_EXECUTE_r( |
1845 | PerlIO_printf( Perl_debug_log," - legal\n")); | |
07be1b83 YO |
1846 | state = tmp; |
1847 | break; | |
1848 | } | |
1849 | else { | |
786e8c11 YO |
1850 | DEBUG_TRIE_EXECUTE_r( |
1851 | PerlIO_printf( Perl_debug_log," - fail\n")); | |
1852 | failed = 1; | |
1853 | state = aho->fail[state]; | |
07be1b83 YO |
1854 | } |
1855 | } | |
1856 | else { | |
1857 | /* we must be accepting here */ | |
786e8c11 YO |
1858 | DEBUG_TRIE_EXECUTE_r( |
1859 | PerlIO_printf( Perl_debug_log," - accepting\n")); | |
1860 | failed = 1; | |
07be1b83 YO |
1861 | break; |
1862 | } | |
1863 | } while(state); | |
786e8c11 | 1864 | uc += len; |
07be1b83 YO |
1865 | if (failed) { |
1866 | if (leftmost) | |
1867 | break; | |
786e8c11 | 1868 | if (!state) state = 1; |
07be1b83 YO |
1869 | } |
1870 | } | |
1871 | if ( aho->states[ state ].wordnum ) { | |
2e64971a | 1872 | U8 *lpos = points[ (pointpos - trie->wordinfo[aho->states[ state ].wordnum].len) % maxlen ]; |
786e8c11 YO |
1873 | if (!leftmost || lpos < leftmost) { |
1874 | DEBUG_r(accepted_word=aho->states[ state ].wordnum); | |
07be1b83 | 1875 | leftmost = lpos; |
786e8c11 | 1876 | } |
07be1b83 | 1877 | } |
07be1b83 YO |
1878 | if (leftmost) { |
1879 | s = (char*)leftmost; | |
786e8c11 YO |
1880 | DEBUG_TRIE_EXECUTE_r({ |
1881 | PerlIO_printf( | |
70685ca0 JH |
1882 | Perl_debug_log,"Matches word #%"UVxf" at position %"IVdf". Trying full pattern...\n", |
1883 | (UV)accepted_word, (IV)(s - real_start) | |
786e8c11 YO |
1884 | ); |
1885 | }); | |
24b23f37 | 1886 | if (!reginfo || regtry(reginfo, &s)) { |
be8e71aa YO |
1887 | FREETMPS; |
1888 | LEAVE; | |
07be1b83 | 1889 | goto got_it; |
be8e71aa | 1890 | } |
07be1b83 | 1891 | s = HOPc(s,1); |
786e8c11 YO |
1892 | DEBUG_TRIE_EXECUTE_r({ |
1893 | PerlIO_printf( Perl_debug_log,"Pattern failed. Looking for new start point...\n"); | |
1894 | }); | |
07be1b83 | 1895 | } else { |
786e8c11 YO |
1896 | DEBUG_TRIE_EXECUTE_r( |
1897 | PerlIO_printf( Perl_debug_log,"No match.\n")); | |
07be1b83 YO |
1898 | break; |
1899 | } | |
1900 | } | |
be8e71aa YO |
1901 | FREETMPS; |
1902 | LEAVE; | |
07be1b83 YO |
1903 | } |
1904 | break; | |
b3c9acc1 | 1905 | default: |
3c3eec57 GS |
1906 | Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c)); |
1907 | break; | |
d6a28714 | 1908 | } |
6eb5f6b9 JH |
1909 | return 0; |
1910 | got_it: | |
1911 | return s; | |
1912 | } | |
1913 | ||
fae667d5 | 1914 | |
6eb5f6b9 JH |
1915 | /* |
1916 | - regexec_flags - match a regexp against a string | |
1917 | */ | |
1918 | I32 | |
288b8c02 | 1919 | Perl_regexec_flags(pTHX_ REGEXP * const rx, char *stringarg, register char *strend, |
6eb5f6b9 JH |
1920 | char *strbeg, I32 minend, SV *sv, void *data, U32 flags) |
1921 | /* strend: pointer to null at end of string */ | |
1922 | /* strbeg: real beginning of string */ | |
1923 | /* minend: end of match must be >=minend after stringarg. */ | |
58e23c8d YO |
1924 | /* data: May be used for some additional optimizations. |
1925 | Currently its only used, with a U32 cast, for transmitting | |
1926 | the ganch offset when doing a /g match. This will change */ | |
6eb5f6b9 JH |
1927 | /* nosave: For optimizations. */ |
1928 | { | |
97aff369 | 1929 | dVAR; |
288b8c02 | 1930 | struct regexp *const prog = (struct regexp *)SvANY(rx); |
24b23f37 | 1931 | /*register*/ char *s; |
6eb5f6b9 | 1932 | register regnode *c; |
24b23f37 | 1933 | /*register*/ char *startpos = stringarg; |
6eb5f6b9 JH |
1934 | I32 minlen; /* must match at least this many chars */ |
1935 | I32 dontbother = 0; /* how many characters not to try at end */ | |
6eb5f6b9 JH |
1936 | I32 end_shift = 0; /* Same for the end. */ /* CC */ |
1937 | I32 scream_pos = -1; /* Internal iterator of scream. */ | |
ccac19ea | 1938 | char *scream_olds = NULL; |
f2ed9b32 | 1939 | const bool utf8_target = cBOOL(DO_UTF8(sv)); |
2757e526 | 1940 | I32 multiline; |
f8fc2ecf | 1941 | RXi_GET_DECL(prog,progi); |
3b0527fe | 1942 | regmatch_info reginfo; /* create some info to pass to regtry etc */ |
e9105d30 | 1943 | regexp_paren_pair *swap = NULL; |
a3621e74 YO |
1944 | GET_RE_DEBUG_FLAGS_DECL; |
1945 | ||
7918f24d | 1946 | PERL_ARGS_ASSERT_REGEXEC_FLAGS; |
9d4ba2ae | 1947 | PERL_UNUSED_ARG(data); |
6eb5f6b9 JH |
1948 | |
1949 | /* Be paranoid... */ | |
1950 | if (prog == NULL || startpos == NULL) { | |
1951 | Perl_croak(aTHX_ "NULL regexp parameter"); | |
1952 | return 0; | |
1953 | } | |
1954 | ||
bbe252da | 1955 | multiline = prog->extflags & RXf_PMf_MULTILINE; |
288b8c02 | 1956 | reginfo.prog = rx; /* Yes, sorry that this is confusing. */ |
2757e526 | 1957 | |
f2ed9b32 | 1958 | RX_MATCH_UTF8_set(rx, utf8_target); |
1de06328 | 1959 | DEBUG_EXECUTE_r( |
f2ed9b32 | 1960 | debug_start_match(rx, utf8_target, startpos, strend, |
1de06328 YO |
1961 | "Matching"); |
1962 | ); | |
bac06658 | 1963 | |
6eb5f6b9 | 1964 | minlen = prog->minlen; |
1de06328 YO |
1965 | |
1966 | if (strend - startpos < (minlen+(prog->check_offset_min<0?prog->check_offset_min:0))) { | |
a3621e74 | 1967 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
a72c7584 JH |
1968 | "String too short [regexec_flags]...\n")); |
1969 | goto phooey; | |
1aa99e6b | 1970 | } |
6eb5f6b9 | 1971 | |
1de06328 | 1972 | |
6eb5f6b9 | 1973 | /* Check validity of program. */ |
f8fc2ecf | 1974 | if (UCHARAT(progi->program) != REG_MAGIC) { |
6eb5f6b9 JH |
1975 | Perl_croak(aTHX_ "corrupted regexp program"); |
1976 | } | |
1977 | ||
1978 | PL_reg_flags = 0; | |
1979 | PL_reg_eval_set = 0; | |
1980 | PL_reg_maxiter = 0; | |
1981 | ||
3c8556c3 | 1982 | if (RX_UTF8(rx)) |
6eb5f6b9 JH |
1983 | PL_reg_flags |= RF_utf8; |
1984 | ||
1985 | /* Mark beginning of line for ^ and lookbehind. */ | |
3b0527fe | 1986 | reginfo.bol = startpos; /* XXX not used ??? */ |
6eb5f6b9 | 1987 | PL_bostr = strbeg; |
3b0527fe | 1988 | reginfo.sv = sv; |
6eb5f6b9 JH |
1989 | |
1990 | /* Mark end of line for $ (and such) */ | |
1991 | PL_regeol = strend; | |
1992 | ||
1993 | /* see how far we have to get to not match where we matched before */ | |
3b0527fe | 1994 | reginfo.till = startpos+minend; |
6eb5f6b9 | 1995 | |
6eb5f6b9 JH |
1996 | /* If there is a "must appear" string, look for it. */ |
1997 | s = startpos; | |
1998 | ||
bbe252da | 1999 | if (prog->extflags & RXf_GPOS_SEEN) { /* Need to set reginfo->ganch */ |
6eb5f6b9 | 2000 | MAGIC *mg; |
2c296965 | 2001 | if (flags & REXEC_IGNOREPOS){ /* Means: check only at start */ |
58e23c8d | 2002 | reginfo.ganch = startpos + prog->gofs; |
2c296965 | 2003 | DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log, |
ed549f2e | 2004 | "GPOS IGNOREPOS: reginfo.ganch = startpos + %"UVxf"\n",(UV)prog->gofs)); |
2c296965 | 2005 | } else if (sv && SvTYPE(sv) >= SVt_PVMG |
6eb5f6b9 | 2006 | && SvMAGIC(sv) |
14befaf4 DM |
2007 | && (mg = mg_find(sv, PERL_MAGIC_regex_global)) |
2008 | && mg->mg_len >= 0) { | |
3b0527fe | 2009 | reginfo.ganch = strbeg + mg->mg_len; /* Defined pos() */ |
2c296965 | 2010 | DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log, |
ed549f2e | 2011 | "GPOS MAGIC: reginfo.ganch = strbeg + %"IVdf"\n",(IV)mg->mg_len)); |
2c296965 | 2012 | |
bbe252da | 2013 | if (prog->extflags & RXf_ANCH_GPOS) { |
3b0527fe | 2014 | if (s > reginfo.ganch) |
6eb5f6b9 | 2015 | goto phooey; |
58e23c8d | 2016 | s = reginfo.ganch - prog->gofs; |
2c296965 | 2017 | DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log, |
ed549f2e | 2018 | "GPOS ANCH_GPOS: s = ganch - %"UVxf"\n",(UV)prog->gofs)); |
c584a96e YO |
2019 | if (s < strbeg) |
2020 | goto phooey; | |
6eb5f6b9 JH |
2021 | } |
2022 | } | |
58e23c8d | 2023 | else if (data) { |
70685ca0 | 2024 | reginfo.ganch = strbeg + PTR2UV(data); |
2c296965 YO |
2025 | DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log, |
2026 | "GPOS DATA: reginfo.ganch= strbeg + %"UVxf"\n",PTR2UV(data))); | |
2027 | ||
2028 | } else { /* pos() not defined */ | |
3b0527fe | 2029 | reginfo.ganch = strbeg; |
2c296965 YO |
2030 | DEBUG_GPOS_r(PerlIO_printf(Perl_debug_log, |
2031 | "GPOS: reginfo.ganch = strbeg\n")); | |
2032 | } | |
6eb5f6b9 | 2033 | } |
288b8c02 | 2034 | if (PL_curpm && (PM_GETRE(PL_curpm) == rx)) { |
e9105d30 GG |
2035 | /* We have to be careful. If the previous successful match |
2036 | was from this regex we don't want a subsequent partially | |
2037 | successful match to clobber the old results. | |
2038 | So when we detect this possibility we add a swap buffer | |
2039 | to the re, and switch the buffer each match. If we fail | |
2040 | we switch it back, otherwise we leave it swapped. | |
2041 | */ | |
2042 | swap = prog->offs; | |
2043 | /* do we need a save destructor here for eval dies? */ | |
2044 | Newxz(prog->offs, (prog->nparens + 1), regexp_paren_pair); | |
c74340f9 | 2045 | } |
a0714e2c | 2046 | if (!(flags & REXEC_CHECKED) && (prog->check_substr != NULL || prog->check_utf8 != NULL)) { |
6eb5f6b9 JH |
2047 | re_scream_pos_data d; |
2048 | ||
2049 | d.scream_olds = &scream_olds; | |
2050 | d.scream_pos = &scream_pos; | |
288b8c02 | 2051 | s = re_intuit_start(rx, sv, s, strend, flags, &d); |
3fa9c3d7 | 2052 | if (!s) { |
a3621e74 | 2053 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not present...\n")); |
6eb5f6b9 | 2054 | goto phooey; /* not present */ |
3fa9c3d7 | 2055 | } |
6eb5f6b9 JH |
2056 | } |
2057 | ||
1de06328 | 2058 | |
6eb5f6b9 JH |
2059 | |
2060 | /* Simplest case: anchored match need be tried only once. */ | |
2061 | /* [unless only anchor is BOL and multiline is set] */ | |
bbe252da | 2062 | if (prog->extflags & (RXf_ANCH & ~RXf_ANCH_GPOS)) { |
24b23f37 | 2063 | if (s == startpos && regtry(®info, &startpos)) |
6eb5f6b9 | 2064 | goto got_it; |
bbe252da YO |
2065 | else if (multiline || (prog->intflags & PREGf_IMPLICIT) |
2066 | || (prog->extflags & RXf_ANCH_MBOL)) /* XXXX SBOL? */ | |
6eb5f6b9 JH |
2067 | { |
2068 | char *end; | |
2069 | ||
2070 | if (minlen) | |
2071 | dontbother = minlen - 1; | |
1aa99e6b | 2072 | end = HOP3c(strend, -dontbother, strbeg) - 1; |
6eb5f6b9 | 2073 | /* for multiline we only have to try after newlines */ |
33b8afdf | 2074 | if (prog->check_substr || prog->check_utf8) { |
92f3d482 YO |
2075 | /* because of the goto we can not easily reuse the macros for bifurcating the |
2076 | unicode/non-unicode match modes here like we do elsewhere - demerphq */ | |
2077 | if (utf8_target) { | |
2078 | if (s == startpos) | |
2079 | goto after_try_utf8; | |
2080 | while (1) { | |
2081 | if (regtry(®info, &s)) { | |
2082 | goto got_it; | |
2083 | } | |
2084 | after_try_utf8: | |
2085 | if (s > end) { | |
2086 | goto phooey; | |
2087 | } | |
2088 | if (prog->extflags & RXf_USE_INTUIT) { | |
2089 | s = re_intuit_start(rx, sv, s + UTF8SKIP(s), strend, flags, NULL); | |
2090 | if (!s) { | |
2091 | goto phooey; | |
2092 | } | |
2093 | } | |
2094 | else { | |
2095 | s += UTF8SKIP(s); | |
2096 | } | |
2097 | } | |
2098 | } /* end search for check string in unicode */ | |
2099 | else { | |
2100 | if (s == startpos) { | |
2101 | goto after_try_latin; | |
2102 | } | |
2103 | while (1) { | |
2104 | if (regtry(®info, &s)) { | |
2105 | goto got_it; | |
2106 | } | |
2107 | after_try_latin: | |
2108 | if (s > end) { | |
2109 | goto phooey; | |
2110 | } | |
2111 | if (prog->extflags & RXf_USE_INTUIT) { | |
2112 | s = re_intuit_start(rx, sv, s + 1, strend, flags, NULL); | |
2113 | if (!s) { | |
2114 | goto phooey; | |
2115 | } | |
2116 | } | |
2117 | else { | |
2118 | s++; | |
2119 | } | |
2120 | } | |
2121 | } /* end search for check string in latin*/ | |
2122 | } /* end search for check string */ | |
2123 | else { /* search for newline */ | |
2124 | if (s > startpos) { | |
2125 | /*XXX: The s-- is almost definitely wrong here under unicode - demeprhq*/ | |
6eb5f6b9 | 2126 | s--; |
92f3d482 YO |
2127 | } |
2128 | /* We can use a more efficient search as newlines are the same in unicode as they are in latin */ | |
6eb5f6b9 JH |
2129 | while (s < end) { |
2130 | if (*s++ == '\n') { /* don't need PL_utf8skip here */ | |
24b23f37 | 2131 | if (regtry(®info, &s)) |
6eb5f6b9 JH |
2132 | goto got_it; |
2133 | } | |
92f3d482 YO |
2134 | } |
2135 | } /* end search for newline */ | |
2136 | } /* end anchored/multiline check string search */ | |
6eb5f6b9 | 2137 | goto phooey; |
bbe252da | 2138 | } else if (RXf_GPOS_CHECK == (prog->extflags & RXf_GPOS_CHECK)) |
f9f4320a YO |
2139 | { |
2140 | /* the warning about reginfo.ganch being used without intialization | |
bbe252da | 2141 | is bogus -- we set it above, when prog->extflags & RXf_GPOS_SEEN |
f9f4320a | 2142 | and we only enter this block when the same bit is set. */ |
58e23c8d | 2143 | char *tmp_s = reginfo.ganch - prog->gofs; |
c584a96e YO |
2144 | |
2145 | if (tmp_s >= strbeg && regtry(®info, &tmp_s)) | |
6eb5f6b9 JH |
2146 | goto got_it; |
2147 | goto phooey; | |
2148 | } | |
2149 | ||
2150 | /* Messy cases: unanchored match. */ | |
bbe252da | 2151 | if ((prog->anchored_substr || prog->anchored_utf8) && prog->intflags & PREGf_SKIP) { |
6eb5f6b9 | 2152 | /* we have /x+whatever/ */ |
f2ed9b32 | 2153 | /* it must be a one character string (XXXX Except UTF_PATTERN?) */ |
33b8afdf | 2154 | char ch; |
bf93d4cc GS |
2155 | #ifdef DEBUGGING |
2156 | int did_match = 0; | |
2157 | #endif | |
f2ed9b32 KW |
2158 | if (!(utf8_target ? prog->anchored_utf8 : prog->anchored_substr)) |
2159 | utf8_target ? to_utf8_substr(prog) : to_byte_substr(prog); | |
2160 | ch = SvPVX_const(utf8_target ? prog->anchored_utf8 : prog->anchored_substr)[0]; | |
bf93d4cc | 2161 | |
f2ed9b32 | 2162 | if (utf8_target) { |
4cadc6a9 | 2163 | REXEC_FBC_SCAN( |
6eb5f6b9 | 2164 | if (*s == ch) { |
a3621e74 | 2165 | DEBUG_EXECUTE_r( did_match = 1 ); |
24b23f37 | 2166 | if (regtry(®info, &s)) goto got_it; |
6eb5f6b9 JH |
2167 | s += UTF8SKIP(s); |
2168 | while (s < strend && *s == ch) | |
2169 | s += UTF8SKIP(s); | |
2170 | } | |
4cadc6a9 | 2171 | ); |
6eb5f6b9 JH |
2172 | } |
2173 | else { | |
4cadc6a9 | 2174 | REXEC_FBC_SCAN( |
6eb5f6b9 | 2175 | if (*s == ch) { |
a3621e74 | 2176 | DEBUG_EXECUTE_r( did_match = 1 ); |
24b23f37 | 2177 | if (regtry(®info, &s)) goto got_it; |
6eb5f6b9 JH |
2178 | s++; |
2179 | while (s < strend && *s == ch) | |
2180 | s++; | |
2181 | } | |
4cadc6a9 | 2182 | ); |
6eb5f6b9 | 2183 | } |
a3621e74 | 2184 | DEBUG_EXECUTE_r(if (!did_match) |
bf93d4cc | 2185 | PerlIO_printf(Perl_debug_log, |
b7953727 JH |
2186 | "Did not find anchored character...\n") |
2187 | ); | |
6eb5f6b9 | 2188 | } |
a0714e2c SS |
2189 | else if (prog->anchored_substr != NULL |
2190 | || prog->anchored_utf8 != NULL | |
2191 | || ((prog->float_substr != NULL || prog->float_utf8 != NULL) | |
33b8afdf JH |
2192 | && prog->float_max_offset < strend - s)) { |
2193 | SV *must; | |
2194 | I32 back_max; | |
2195 | I32 back_min; | |
2196 | char *last; | |
6eb5f6b9 | 2197 | char *last1; /* Last position checked before */ |
bf93d4cc GS |
2198 | #ifdef DEBUGGING |
2199 | int did_match = 0; | |
2200 | #endif | |
33b8afdf | 2201 | if (prog->anchored_substr || prog->anchored_utf8) { |
f2ed9b32 KW |
2202 | if (!(utf8_target ? prog->anchored_utf8 : prog->anchored_substr)) |
2203 | utf8_target ? to_utf8_substr(prog) : to_byte_substr(prog); | |
2204 | must = utf8_target ? prog->anchored_utf8 : prog->anchored_substr; | |
33b8afdf JH |
2205 | back_max = back_min = prog->anchored_offset; |
2206 | } else { | |
f2ed9b32 KW |
2207 | if (!(utf8_target ? prog->float_utf8 : prog->float_substr)) |
2208 | utf8_target ? to_utf8_substr(prog) : to_byte_substr(prog); | |
2209 | must = utf8_target ? prog->float_utf8 : prog->float_substr; | |
33b8afdf JH |
2210 | back_max = prog->float_max_offset; |
2211 | back_min = prog->float_min_offset; | |
2212 | } | |
1de06328 YO |
2213 | |
2214 | ||
33b8afdf JH |
2215 | if (must == &PL_sv_undef) |
2216 | /* could not downgrade utf8 check substring, so must fail */ | |
2217 | goto phooey; | |
2218 | ||
1de06328 YO |
2219 | if (back_min<0) { |
2220 | last = strend; | |
2221 | } else { | |
2222 | last = HOP3c(strend, /* Cannot start after this */ | |
2223 | -(I32)(CHR_SVLEN(must) | |
2224 | - (SvTAIL(must) != 0) + back_min), strbeg); | |
2225 | } | |
6eb5f6b9 JH |
2226 | if (s > PL_bostr) |
2227 | last1 = HOPc(s, -1); | |
2228 | else | |
2229 | last1 = s - 1; /* bogus */ | |
2230 | ||
a0288114 | 2231 | /* XXXX check_substr already used to find "s", can optimize if |
6eb5f6b9 JH |
2232 | check_substr==must. */ |
2233 | scream_pos = -1; | |
2234 | dontbother = end_shift; | |
2235 | strend = HOPc(strend, -dontbother); | |
2236 | while ( (s <= last) && | |
9041c2e3 | 2237 | ((flags & REXEC_SCREAM) |
1de06328 | 2238 | ? (s = screaminstr(sv, must, HOP3c(s, back_min, (back_min<0 ? strbeg : strend)) - strbeg, |
6eb5f6b9 | 2239 | end_shift, &scream_pos, 0)) |
1de06328 | 2240 | : (s = fbm_instr((unsigned char*)HOP3(s, back_min, (back_min<0 ? strbeg : strend)), |
9041c2e3 | 2241 | (unsigned char*)strend, must, |
7fba1cd6 | 2242 | multiline ? FBMrf_MULTILINE : 0))) ) { |
4addbd3b | 2243 | /* we may be pointing at the wrong string */ |
07bc277f | 2244 | if ((flags & REXEC_SCREAM) && RXp_MATCH_COPIED(prog)) |
3f7c398e | 2245 | s = strbeg + (s - SvPVX_const(sv)); |
a3621e74 | 2246 | DEBUG_EXECUTE_r( did_match = 1 ); |
6eb5f6b9 JH |
2247 | if (HOPc(s, -back_max) > last1) { |
2248 | last1 = HOPc(s, -back_min); | |
2249 | s = HOPc(s, -back_max); | |
2250 | } | |
2251 | else { | |
52657f30 | 2252 | char * const t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1; |
6eb5f6b9 JH |
2253 | |
2254 | last1 = HOPc(s, -back_min); | |
52657f30 | 2255 | s = t; |
6eb5f6b9 | 2256 | } |
f2ed9b32 | 2257 | if (utf8_target) { |
6eb5f6b9 | 2258 | while (s <= last1) { |
24b23f37 | 2259 | if (regtry(®info, &s)) |
6eb5f6b9 JH |
2260 | goto got_it; |
2261 | s += UTF8SKIP(s); | |
2262 | } | |
2263 | } | |
2264 | else { | |
2265 | while (s <= last1) { | |
24b23f37 | 2266 | if (regtry(®info, &s)) |
6eb5f6b9 JH |
2267 | goto got_it; |
2268 | s++; | |
2269 | } | |
2270 | } | |
2271 | } | |
ab3bbdeb | 2272 | DEBUG_EXECUTE_r(if (!did_match) { |
f2ed9b32 | 2273 | RE_PV_QUOTED_DECL(quoted, utf8_target, PERL_DEBUG_PAD_ZERO(0), |
ab3bbdeb YO |
2274 | SvPVX_const(must), RE_SV_DUMPLEN(must), 30); |
2275 | PerlIO_printf(Perl_debug_log, "Did not find %s substr %s%s...\n", | |
33b8afdf | 2276 | ((must == prog->anchored_substr || must == prog->anchored_utf8) |
bf93d4cc | 2277 | ? "anchored" : "floating"), |
ab3bbdeb YO |
2278 | quoted, RE_SV_TAIL(must)); |
2279 | }); | |
6eb5f6b9 JH |
2280 | goto phooey; |
2281 | } | |
f8fc2ecf | 2282 | else if ( (c = progi->regstclass) ) { |
f14c76ed | 2283 | if (minlen) { |
f8fc2ecf | 2284 | const OPCODE op = OP(progi->regstclass); |
66e933ab | 2285 | /* don't bother with what can't match */ |
786e8c11 | 2286 | if (PL_regkind[op] != EXACT && op != CANY && PL_regkind[op] != TRIE) |
f14c76ed RGS |
2287 | strend = HOPc(strend, -(minlen - 1)); |
2288 | } | |
a3621e74 | 2289 | DEBUG_EXECUTE_r({ |
be8e71aa | 2290 | SV * const prop = sv_newmortal(); |
32fc9b6a | 2291 | regprop(prog, prop, c); |
0df25f3d | 2292 | { |
f2ed9b32 | 2293 | RE_PV_QUOTED_DECL(quoted,utf8_target,PERL_DEBUG_PAD_ZERO(1), |
ab3bbdeb | 2294 | s,strend-s,60); |
0df25f3d | 2295 | PerlIO_printf(Perl_debug_log, |
1c8f8eb1 | 2296 | "Matching stclass %.*s against %s (%d bytes)\n", |
e4f74956 | 2297 | (int)SvCUR(prop), SvPVX_const(prop), |
ab3bbdeb | 2298 | quoted, (int)(strend - s)); |
0df25f3d | 2299 | } |
ffc61ed2 | 2300 | }); |
3b0527fe | 2301 | if (find_byclass(prog, c, s, strend, ®info)) |
6eb5f6b9 | 2302 | goto got_it; |
07be1b83 | 2303 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass... [regexec_flags]\n")); |
d6a28714 JH |
2304 | } |
2305 | else { | |
2306 | dontbother = 0; | |
a0714e2c | 2307 | if (prog->float_substr != NULL || prog->float_utf8 != NULL) { |
33b8afdf | 2308 | /* Trim the end. */ |
d6a28714 | 2309 | char *last; |
33b8afdf JH |
2310 | SV* float_real; |
2311 | ||
f2ed9b32 KW |
2312 | if (!(utf8_target ? prog->float_utf8 : prog->float_substr)) |
2313 | utf8_target ? to_utf8_substr(prog) : to_byte_substr(prog); | |
2314 | float_real = utf8_target ? prog->float_utf8 : prog->float_substr; | |
d6a28714 JH |
2315 | |
2316 | if (flags & REXEC_SCREAM) { | |
33b8afdf | 2317 | last = screaminstr(sv, float_real, s - strbeg, |
d6a28714 JH |
2318 | end_shift, &scream_pos, 1); /* last one */ |
2319 | if (!last) | |
ffc61ed2 | 2320 | last = scream_olds; /* Only one occurrence. */ |
4addbd3b | 2321 | /* we may be pointing at the wrong string */ |
07bc277f | 2322 | else if (RXp_MATCH_COPIED(prog)) |
3f7c398e | 2323 | s = strbeg + (s - SvPVX_const(sv)); |
b8c5462f | 2324 | } |
d6a28714 JH |
2325 | else { |
2326 | STRLEN len; | |
cfd0369c | 2327 | const char * const little = SvPV_const(float_real, len); |
d6a28714 | 2328 | |
33b8afdf | 2329 | if (SvTAIL(float_real)) { |
d6a28714 JH |
2330 | if (memEQ(strend - len + 1, little, len - 1)) |
2331 | last = strend - len + 1; | |
7fba1cd6 | 2332 | else if (!multiline) |
9041c2e3 | 2333 | last = memEQ(strend - len, little, len) |
bd61b366 | 2334 | ? strend - len : NULL; |
b8c5462f | 2335 | else |
d6a28714 JH |
2336 | goto find_last; |
2337 | } else { | |
2338 | find_last: | |
9041c2e3 | 2339 | if (len) |
d6a28714 | 2340 | last = rninstr(s, strend, little, little + len); |
b8c5462f | 2341 | else |
a0288114 | 2342 | last = strend; /* matching "$" */ |
b8c5462f | 2343 | } |
b8c5462f | 2344 | } |
bf93d4cc | 2345 | if (last == NULL) { |
6bda09f9 YO |
2346 | DEBUG_EXECUTE_r( |
2347 | PerlIO_printf(Perl_debug_log, | |
2348 | "%sCan't trim the tail, match fails (should not happen)%s\n", | |
2349 | PL_colors[4], PL_colors[5])); | |
bf93d4cc GS |
2350 | goto phooey; /* Should not happen! */ |
2351 | } | |
d6a28714 JH |
2352 | dontbother = strend - last + prog->float_min_offset; |
2353 | } | |
2354 | if (minlen && (dontbother < minlen)) | |
2355 | dontbother = minlen - 1; | |
2356 | strend -= dontbother; /* this one's always in bytes! */ | |
2357 | /* We don't know much -- general case. */ | |
f2ed9b32 | 2358 | if (utf8_target) { |
d6a28714 | 2359 | for (;;) { |
24b23f37 | 2360 | if (regtry(®info, &s)) |
d6a28714 JH |
2361 | goto got_it; |
2362 | if (s >= strend) | |
2363 | break; | |
b8c5462f | 2364 | s += UTF8SKIP(s); |
d6a28714 JH |
2365 | }; |
2366 | } | |
2367 | else { | |
2368 | do { | |
24b23f37 | 2369 | if (regtry(®info, &s)) |
d6a28714 JH |
2370 | goto got_it; |
2371 | } while (s++ < strend); | |
2372 | } | |
2373 | } | |
2374 | ||
2375 | /* Failure. */ | |
2376 | goto phooey; | |
2377 | ||
2378 | got_it: | |
e9105d30 | 2379 | Safefree(swap); |
288b8c02 | 2380 | RX_MATCH_TAINTED_set(rx, PL_reg_flags & RF_tainted); |
d6a28714 | 2381 | |
19b95bf0 | 2382 | if (PL_reg_eval_set) |
4f639d21 | 2383 | restore_pos(aTHX_ prog); |
5daac39c NC |
2384 | if (RXp_PAREN_NAMES(prog)) |
2385 | (void)hv_iterinit(RXp_PAREN_NAMES(prog)); | |
d6a28714 JH |
2386 | |
2387 | /* make sure $`, $&, $', and $digit will work later */ | |
2388 | if ( !(flags & REXEC_NOT_FIRST) ) { | |
288b8c02 | 2389 | RX_MATCH_COPY_FREE(rx); |
d6a28714 | 2390 | if (flags & REXEC_COPY_STR) { |
be8e71aa | 2391 | const I32 i = PL_regeol - startpos + (stringarg - strbeg); |
f8c7b90f | 2392 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2393 | if ((SvIsCOW(sv) |
2394 | || (SvFLAGS(sv) & CAN_COW_MASK) == CAN_COW_FLAGS)) { | |
2395 | if (DEBUG_C_TEST) { | |
2396 | PerlIO_printf(Perl_debug_log, | |
2397 | "Copy on write: regexp capture, type %d\n", | |
2398 | (int) SvTYPE(sv)); | |
2399 | } | |
2400 | prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv); | |
d5263905 | 2401 | prog->subbeg = (char *)SvPVX_const(prog->saved_copy); |
ed252734 NC |
2402 | assert (SvPOKp(prog->saved_copy)); |
2403 | } else | |
2404 | #endif | |
2405 | { | |
288b8c02 | 2406 | RX_MATCH_COPIED_on(rx); |
ed252734 NC |
2407 | s = savepvn(strbeg, i); |
2408 | prog->subbeg = s; | |
2409 | } | |
d6a28714 | 2410 | prog->sublen = i; |
d6a28714 JH |
2411 | } |
2412 | else { | |
2413 | prog->subbeg = strbeg; | |
2414 | prog->sublen = PL_regeol - strbeg; /* strend may have been modified */ | |
2415 | } | |
2416 | } | |
9041c2e3 | 2417 | |
d6a28714 JH |
2418 | return 1; |
2419 | ||
2420 | phooey: | |
a3621e74 | 2421 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n", |
e4584336 | 2422 | PL_colors[4], PL_colors[5])); |
d6a28714 | 2423 | if (PL_reg_eval_set) |
4f639d21 | 2424 | restore_pos(aTHX_ prog); |
e9105d30 | 2425 | if (swap) { |
c74340f9 | 2426 | /* we failed :-( roll it back */ |
e9105d30 GG |
2427 | Safefree(prog->offs); |
2428 | prog->offs = swap; | |
2429 | } | |
2430 | ||
d6a28714 JH |
2431 | return 0; |
2432 | } | |
2433 | ||
6bda09f9 | 2434 | |
d6a28714 JH |
2435 | /* |
2436 | - regtry - try match at specific point | |
2437 | */ | |
2438 | STATIC I32 /* 0 failure, 1 success */ | |
24b23f37 | 2439 | S_regtry(pTHX_ regmatch_info *reginfo, char **startpos) |
d6a28714 | 2440 | { |
97aff369 | 2441 | dVAR; |
d6a28714 | 2442 | CHECKPOINT lastcp; |
288b8c02 NC |
2443 | REGEXP *const rx = reginfo->prog; |
2444 | regexp *const prog = (struct regexp *)SvANY(rx); | |
f8fc2ecf | 2445 | RXi_GET_DECL(prog,progi); |
a3621e74 | 2446 | GET_RE_DEBUG_FLAGS_DECL; |
7918f24d NC |
2447 | |
2448 | PERL_ARGS_ASSERT_REGTRY; | |
2449 | ||
24b23f37 | 2450 | reginfo->cutpoint=NULL; |
d6a28714 | 2451 | |
bbe252da | 2452 | if ((prog->extflags & RXf_EVAL_SEEN) && !PL_reg_eval_set) { |
d6a28714 JH |
2453 | MAGIC *mg; |
2454 | ||
2455 | PL_reg_eval_set = RS_init; | |
a3621e74 | 2456 | DEBUG_EXECUTE_r(DEBUG_s( |
b900a521 JH |
2457 | PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n", |
2458 | (IV)(PL_stack_sp - PL_stack_base)); | |
d6a28714 | 2459 | )); |
ea8d6ae1 | 2460 | SAVESTACK_CXPOS(); |
d6a28714 JH |
2461 | cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base; |
2462 | /* Otherwise OP_NEXTSTATE will free whatever on stack now. */ | |
2463 | SAVETMPS; | |
2464 | /* Apparently this is not needed, judging by wantarray. */ | |
e8347627 | 2465 | /* SAVEI8(cxstack[cxstack_ix].blk_gimme); |
d6a28714 JH |
2466 | cxstack[cxstack_ix].blk_gimme = G_SCALAR; */ |
2467 | ||
3b0527fe | 2468 | if (reginfo->sv) { |
d6a28714 | 2469 | /* Make $_ available to executed code. */ |
3b0527fe | 2470 | if (reginfo->sv != DEFSV) { |
59f00321 | 2471 | SAVE_DEFSV; |
414bf5ae | 2472 | DEFSV_set(reginfo->sv); |
b8c5462f | 2473 | } |
d6a28714 | 2474 | |
3b0527fe DM |
2475 | if (!(SvTYPE(reginfo->sv) >= SVt_PVMG && SvMAGIC(reginfo->sv) |
2476 | && (mg = mg_find(reginfo->sv, PERL_MAGIC_regex_global)))) { | |
d6a28714 | 2477 | /* prepare for quick setting of pos */ |
d300d9fa | 2478 | #ifdef PERL_OLD_COPY_ON_WRITE |
51a9ea20 NC |
2479 | if (SvIsCOW(reginfo->sv)) |
2480 | sv_force_normal_flags(reginfo->sv, 0); | |
d300d9fa | 2481 | #endif |
3dab1dad | 2482 | mg = sv_magicext(reginfo->sv, NULL, PERL_MAGIC_regex_global, |
d300d9fa | 2483 | &PL_vtbl_mglob, NULL, 0); |
d6a28714 | 2484 | mg->mg_len = -1; |
b8c5462f | 2485 | } |
d6a28714 JH |
2486 | PL_reg_magic = mg; |
2487 | PL_reg_oldpos = mg->mg_len; | |
4f639d21 | 2488 | SAVEDESTRUCTOR_X(restore_pos, prog); |
d6a28714 | 2489 | } |
09687e5a | 2490 | if (!PL_reg_curpm) { |
a02a5408 | 2491 | Newxz(PL_reg_curpm, 1, PMOP); |
09687e5a AB |
2492 | #ifdef USE_ITHREADS |
2493 | { | |
14a49a24 | 2494 | SV* const repointer = &PL_sv_undef; |
92313705 NC |
2495 | /* this regexp is also owned by the new PL_reg_curpm, which |
2496 | will try to free it. */ | |
d2ece331 | 2497 | av_push(PL_regex_padav, repointer); |
09687e5a AB |
2498 | PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav); |
2499 | PL_regex_pad = AvARRAY(PL_regex_padav); | |
2500 | } | |
2501 | #endif | |
2502 | } | |
86c29d75 NC |
2503 | #ifdef USE_ITHREADS |
2504 | /* It seems that non-ithreads works both with and without this code. | |
2505 | So for efficiency reasons it seems best not to have the code | |
2506 | compiled when it is not needed. */ | |
92313705 NC |
2507 | /* This is safe against NULLs: */ |
2508 | ReREFCNT_dec(PM_GETRE(PL_reg_curpm)); | |
2509 | /* PM_reg_curpm owns a reference to this regexp. */ | |
2510 | ReREFCNT_inc(rx); | |
86c29d75 | 2511 | #endif |
288b8c02 | 2512 | PM_SETRE(PL_reg_curpm, rx); |
d6a28714 JH |
2513 | PL_reg_oldcurpm = PL_curpm; |
2514 | PL_curpm = PL_reg_curpm; | |
07bc277f | 2515 | if (RXp_MATCH_COPIED(prog)) { |
d6a28714 JH |
2516 | /* Here is a serious problem: we cannot rewrite subbeg, |
2517 | since it may be needed if this match fails. Thus | |
2518 | $` inside (?{}) could fail... */ | |
2519 | PL_reg_oldsaved = prog->subbeg; | |
2520 | PL_reg_oldsavedlen = prog->sublen; | |
f8c7b90f | 2521 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2522 | PL_nrs = prog->saved_copy; |
2523 | #endif | |
07bc277f | 2524 | RXp_MATCH_COPIED_off(prog); |
d6a28714 JH |
2525 | } |
2526 | else | |
bd61b366 | 2527 | PL_reg_oldsaved = NULL; |
d6a28714 JH |
2528 | prog->subbeg = PL_bostr; |
2529 | prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */ | |
2530 | } | |
24b23f37 | 2531 | DEBUG_EXECUTE_r(PL_reg_starttry = *startpos); |
f0ab9afb | 2532 | prog->offs[0].start = *startpos - PL_bostr; |
24b23f37 | 2533 | PL_reginput = *startpos; |
d6a28714 | 2534 | PL_reglastparen = &prog->lastparen; |
a01268b5 | 2535 | PL_reglastcloseparen = &prog->lastcloseparen; |
d6a28714 | 2536 | prog->lastparen = 0; |
03994de8 | 2537 | prog->lastcloseparen = 0; |
d6a28714 | 2538 | PL_regsize = 0; |
f0ab9afb | 2539 | PL_regoffs = prog->offs; |
d6a28714 JH |
2540 | if (PL_reg_start_tmpl <= prog->nparens) { |
2541 | PL_reg_start_tmpl = prog->nparens*3/2 + 3; | |
2542 | if(PL_reg_start_tmp) | |
2543 | Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*); | |
2544 | else | |
a02a5408 | 2545 | Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*); |
d6a28714 JH |
2546 | } |
2547 | ||
2548 | /* XXXX What this code is doing here?!!! There should be no need | |
2549 | to do this again and again, PL_reglastparen should take care of | |
3dd2943c | 2550 | this! --ilya*/ |
dafc8851 JH |
2551 | |
2552 | /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code. | |
2553 | * Actually, the code in regcppop() (which Ilya may be meaning by | |
daf18116 | 2554 | * PL_reglastparen), is not needed at all by the test suite |
225593e1 DM |
2555 | * (op/regexp, op/pat, op/split), but that code is needed otherwise |
2556 | * this erroneously leaves $1 defined: "1" =~ /^(?:(\d)x)?\d$/ | |
2557 | * Meanwhile, this code *is* needed for the | |
daf18116 JH |
2558 | * above-mentioned test suite tests to succeed. The common theme |
2559 | * on those tests seems to be returning null fields from matches. | |
225593e1 | 2560 | * --jhi updated by dapm */ |
dafc8851 | 2561 | #if 1 |
d6a28714 | 2562 | if (prog->nparens) { |
f0ab9afb | 2563 | regexp_paren_pair *pp = PL_regoffs; |
097eb12c | 2564 | register I32 i; |
eb160463 | 2565 | for (i = prog->nparens; i > (I32)*PL_reglastparen; i--) { |
f0ab9afb NC |
2566 | ++pp; |
2567 | pp->start = -1; | |
2568 | pp->end = -1; | |
d6a28714 JH |
2569 | } |
2570 | } | |
dafc8851 | 2571 | #endif |
02db2b7b | 2572 | REGCP_SET(lastcp); |
f8fc2ecf | 2573 | if (regmatch(reginfo, progi->program + 1)) { |
f0ab9afb | 2574 | PL_regoffs[0].end = PL_reginput - PL_bostr; |
d6a28714 JH |
2575 | return 1; |
2576 | } | |
24b23f37 YO |
2577 | if (reginfo->cutpoint) |
2578 | *startpos= reginfo->cutpoint; | |
02db2b7b | 2579 | REGCP_UNWIND(lastcp); |
d6a28714 JH |
2580 | return 0; |
2581 | } | |
2582 | ||
02db2b7b | 2583 | |
8ba1375e MJD |
2584 | #define sayYES goto yes |
2585 | #define sayNO goto no | |
262b90c4 | 2586 | #define sayNO_SILENT goto no_silent |
8ba1375e | 2587 | |
f9f4320a YO |
2588 | /* we dont use STMT_START/END here because it leads to |
2589 | "unreachable code" warnings, which are bogus, but distracting. */ | |
2590 | #define CACHEsayNO \ | |
c476f425 DM |
2591 | if (ST.cache_mask) \ |
2592 | PL_reg_poscache[ST.cache_offset] |= ST.cache_mask; \ | |
f9f4320a | 2593 | sayNO |
3298f257 | 2594 | |
a3621e74 | 2595 | /* this is used to determine how far from the left messages like |
265c4333 YO |
2596 | 'failed...' are printed. It should be set such that messages |
2597 | are inline with the regop output that created them. | |
a3621e74 | 2598 | */ |
265c4333 | 2599 | #define REPORT_CODE_OFF 32 |
a3621e74 YO |
2600 | |
2601 | ||
40a82448 DM |
2602 | #define CHRTEST_UNINIT -1001 /* c1/c2 haven't been calculated yet */ |
2603 | #define CHRTEST_VOID -1000 /* the c1/c2 "next char" test should be skipped */ | |
9e137952 | 2604 | |
86545054 DM |
2605 | #define SLAB_FIRST(s) (&(s)->states[0]) |
2606 | #define SLAB_LAST(s) (&(s)->states[PERL_REGMATCH_SLAB_SLOTS-1]) | |
2607 | ||
5d9a96ca DM |
2608 | /* grab a new slab and return the first slot in it */ |
2609 | ||
2610 | STATIC regmatch_state * | |
2611 | S_push_slab(pTHX) | |
2612 | { | |
a35a87e7 | 2613 | #if PERL_VERSION < 9 && !defined(PERL_CORE) |
54df2634 NC |
2614 | dMY_CXT; |
2615 | #endif | |
5d9a96ca DM |
2616 | regmatch_slab *s = PL_regmatch_slab->next; |
2617 | if (!s) { | |
2618 | Newx(s, 1, regmatch_slab); | |
2619 | s->prev = PL_regmatch_slab; | |
2620 | s->next = NULL; | |
2621 | PL_regmatch_slab->next = s; | |
2622 | } | |
2623 | PL_regmatch_slab = s; | |
86545054 | 2624 | return SLAB_FIRST(s); |
5d9a96ca | 2625 | } |
5b47454d | 2626 | |
95b24440 | 2627 | |
40a82448 DM |
2628 | /* push a new state then goto it */ |
2629 | ||
2630 | #define PUSH_STATE_GOTO(state, node) \ | |
2631 | scan = node; \ | |
2632 | st->resume_state = state; \ | |
2633 | goto push_state; | |
2634 | ||
2635 | /* push a new state with success backtracking, then goto it */ | |
2636 | ||
2637 | #define PUSH_YES_STATE_GOTO(state, node) \ | |
2638 | scan = node; \ | |
2639 | st->resume_state = state; \ | |
2640 | goto push_yes_state; | |
2641 | ||
aa283a38 | 2642 | |
aa283a38 | 2643 | |
d6a28714 | 2644 | /* |
95b24440 | 2645 | |
bf1f174e DM |
2646 | regmatch() - main matching routine |
2647 | ||
2648 | This is basically one big switch statement in a loop. We execute an op, | |
2649 | set 'next' to point the next op, and continue. If we come to a point which | |
2650 | we may need to backtrack to on failure such as (A|B|C), we push a | |
2651 | backtrack state onto the backtrack stack. On failure, we pop the top | |
2652 | state, and re-enter the loop at the state indicated. If there are no more | |
2653 | states to pop, we return failure. | |
2654 | ||
2655 | Sometimes we also need to backtrack on success; for example /A+/, where | |
2656 | after successfully matching one A, we need to go back and try to | |
2657 | match another one; similarly for lookahead assertions: if the assertion | |
2658 | completes successfully, we backtrack to the state just before the assertion | |
2659 | and then carry on. In these cases, the pushed state is marked as | |
2660 | 'backtrack on success too'. This marking is in fact done by a chain of | |
2661 | pointers, each pointing to the previous 'yes' state. On success, we pop to | |
2662 | the nearest yes state, discarding any intermediate failure-only states. | |
2663 | Sometimes a yes state is pushed just to force some cleanup code to be | |
2664 | called at the end of a successful match or submatch; e.g. (??{$re}) uses | |
2665 | it to free the inner regex. | |
2666 | ||
2667 | Note that failure backtracking rewinds the cursor position, while | |
2668 | success backtracking leaves it alone. | |
2669 | ||
2670 | A pattern is complete when the END op is executed, while a subpattern | |
2671 | such as (?=foo) is complete when the SUCCESS op is executed. Both of these | |
2672 | ops trigger the "pop to last yes state if any, otherwise return true" | |
2673 | behaviour. | |
2674 | ||
2675 | A common convention in this function is to use A and B to refer to the two | |
2676 | subpatterns (or to the first nodes thereof) in patterns like /A*B/: so A is | |
2677 | the subpattern to be matched possibly multiple times, while B is the entire | |
2678 | rest of the pattern. Variable and state names reflect this convention. | |
2679 | ||
2680 | The states in the main switch are the union of ops and failure/success of | |
2681 | substates associated with with that op. For example, IFMATCH is the op | |
2682 | that does lookahead assertions /(?=A)B/ and so the IFMATCH state means | |
2683 | 'execute IFMATCH'; while IFMATCH_A is a state saying that we have just | |
2684 | successfully matched A and IFMATCH_A_fail is a state saying that we have | |
2685 | just failed to match A. Resume states always come in pairs. The backtrack | |
2686 | state we push is marked as 'IFMATCH_A', but when that is popped, we resume | |
2687 | at IFMATCH_A or IFMATCH_A_fail, depending on whether we are backtracking | |
2688 | on success or failure. | |
2689 | ||
2690 | The struct that holds a backtracking state is actually a big union, with | |
2691 | one variant for each major type of op. The variable st points to the | |
2692 | top-most backtrack struct. To make the code clearer, within each | |
2693 | block of code we #define ST to alias the relevant union. | |
2694 | ||
2695 | Here's a concrete example of a (vastly oversimplified) IFMATCH | |
2696 | implementation: | |
2697 | ||
2698 | switch (state) { | |
2699 | .... | |
2700 | ||
2701 | #define ST st->u.ifmatch | |
2702 | ||
2703 | case IFMATCH: // we are executing the IFMATCH op, (?=A)B | |
2704 | ST.foo = ...; // some state we wish to save | |
95b24440 | 2705 | ... |
bf1f174e DM |
2706 | // push a yes backtrack state with a resume value of |
2707 | // IFMATCH_A/IFMATCH_A_fail, then continue execution at the | |
2708 | // first node of A: | |
2709 | PUSH_YES_STATE_GOTO(IFMATCH_A, A); | |
2710 | // NOTREACHED | |
2711 | ||
2712 | case IFMATCH_A: // we have successfully executed A; now continue with B | |
2713 | next = B; | |
2714 | bar = ST.foo; // do something with the preserved value | |
2715 | break; | |
2716 | ||
2717 | case IFMATCH_A_fail: // A failed, so the assertion failed | |
2718 | ...; // do some housekeeping, then ... | |
2719 | sayNO; // propagate the failure | |
2720 | ||
2721 | #undef ST | |
95b24440 | 2722 | |
bf1f174e DM |
2723 | ... |
2724 | } | |
95b24440 | 2725 | |
bf1f174e DM |
2726 | For any old-timers reading this who are familiar with the old recursive |
2727 | approach, the code above is equivalent to: | |
95b24440 | 2728 | |
bf1f174e DM |
2729 | case IFMATCH: // we are executing the IFMATCH op, (?=A)B |
2730 | { | |
2731 | int foo = ... | |
95b24440 | 2732 | ... |
bf1f174e DM |
2733 | if (regmatch(A)) { |
2734 | next = B; | |
2735 | bar = foo; | |
2736 | break; | |
95b24440 | 2737 | } |
bf1f174e DM |
2738 | ...; // do some housekeeping, then ... |
2739 | sayNO; // propagate the failure | |
95b24440 | 2740 | } |
bf1f174e DM |
2741 | |
2742 | The topmost backtrack state, pointed to by st, is usually free. If you | |
2743 | want to claim it, populate any ST.foo fields in it with values you wish to | |
2744 | save, then do one of | |
2745 | ||
2746 | PUSH_STATE_GOTO(resume_state, node); | |
2747 | PUSH_YES_STATE_GOTO(resume_state, node); | |
2748 | ||
2749 | which sets that backtrack state's resume value to 'resume_state', pushes a | |
2750 | new free entry to the top of the backtrack stack, then goes to 'node'. | |
2751 | On backtracking, the free slot is popped, and the saved state becomes the | |
2752 | new free state. An ST.foo field in this new top state can be temporarily | |
2753 | accessed to retrieve values, but once the main loop is re-entered, it | |
2754 | becomes available for reuse. | |
2755 | ||
2756 | Note that the depth of the backtrack stack constantly increases during the | |
2757 | left-to-right execution of the pattern, rather than going up and down with | |
2758 | the pattern nesting. For example the stack is at its maximum at Z at the | |
2759 | end of the pattern, rather than at X in the following: | |
2760 | ||
2761 | /(((X)+)+)+....(Y)+....Z/ | |
2762 | ||
2763 | The only exceptions to this are lookahead/behind assertions and the cut, | |
2764 | (?>A), which pop all the backtrack states associated with A before | |
2765 | continuing. | |
2766 | ||
2767 | Bascktrack state structs are allocated in slabs of about 4K in size. | |
2768 | PL_regmatch_state and st always point to the currently active state, | |
2769 | and PL_regmatch_slab points to the slab currently containing | |
2770 | PL_regmatch_state. The first time regmatch() is called, the first slab is | |
2771 | allocated, and is never freed until interpreter destruction. When the slab | |
2772 | is full, a new one is allocated and chained to the end. At exit from | |
2773 | regmatch(), slabs allocated since entry are freed. | |
2774 | ||
2775 | */ | |
95b24440 | 2776 | |
40a82448 | 2777 | |
5bc10b2c | 2778 | #define DEBUG_STATE_pp(pp) \ |
265c4333 | 2779 | DEBUG_STATE_r({ \ |
f2ed9b32 | 2780 | DUMP_EXEC_POS(locinput, scan, utf8_target); \ |
5bc10b2c | 2781 | PerlIO_printf(Perl_debug_log, \ |
5d458dd8 | 2782 | " %*s"pp" %s%s%s%s%s\n", \ |
5bc10b2c | 2783 | depth*2, "", \ |
13d6edb4 | 2784 | PL_reg_name[st->resume_state], \ |
5d458dd8 YO |
2785 | ((st==yes_state||st==mark_state) ? "[" : ""), \ |
2786 | ((st==yes_state) ? "Y" : ""), \ | |
2787 | ((st==mark_state) ? "M" : ""), \ | |
2788 | ((st==yes_state||st==mark_state) ? "]" : "") \ | |
2789 | ); \ | |
265c4333 | 2790 | }); |
5bc10b2c | 2791 | |
40a82448 | 2792 | |
3dab1dad | 2793 | #define REG_NODE_NUM(x) ((x) ? (int)((x)-prog) : -1) |
95b24440 | 2794 | |
3df15adc | 2795 | #ifdef DEBUGGING |
5bc10b2c | 2796 | |
ab3bbdeb | 2797 | STATIC void |
f2ed9b32 | 2798 | S_debug_start_match(pTHX_ const REGEXP *prog, const bool utf8_target, |
ab3bbdeb YO |
2799 | const char *start, const char *end, const char *blurb) |
2800 | { | |
efd26800 | 2801 | const bool utf8_pat = RX_UTF8(prog) ? 1 : 0; |
7918f24d NC |
2802 | |
2803 | PERL_ARGS_ASSERT_DEBUG_START_MATCH; | |
2804 | ||
ab3bbdeb YO |
2805 | if (!PL_colorset) |
2806 | reginitcolors(); | |
2807 | { | |
2808 | RE_PV_QUOTED_DECL(s0, utf8_pat, PERL_DEBUG_PAD_ZERO(0), | |
d2c6dc5e | 2809 | RX_PRECOMP_const(prog), RX_PRELEN(prog), 60); |
ab3bbdeb | 2810 | |
f2ed9b32 | 2811 | RE_PV_QUOTED_DECL(s1, utf8_target, PERL_DEBUG_PAD_ZERO(1), |
ab3bbdeb YO |
2812 | start, end - start, 60); |
2813 | ||
2814 | PerlIO_printf(Perl_debug_log, | |
2815 | "%s%s REx%s %s against %s\n", | |
2816 | PL_colors[4], blurb, PL_colors[5], s0, s1); | |
2817 | ||
f2ed9b32 | 2818 | if (utf8_target||utf8_pat) |
1de06328 YO |
2819 | PerlIO_printf(Perl_debug_log, "UTF-8 %s%s%s...\n", |
2820 | utf8_pat ? "pattern" : "", | |
f2ed9b32 KW |
2821 | utf8_pat && utf8_target ? " and " : "", |
2822 | utf8_target ? "string" : "" | |
ab3bbdeb YO |
2823 | ); |
2824 | } | |
2825 | } | |
3df15adc YO |
2826 | |
2827 | STATIC void | |
786e8c11 YO |
2828 | S_dump_exec_pos(pTHX_ const char *locinput, |
2829 | const regnode *scan, | |
2830 | const char *loc_regeol, | |
2831 | const char *loc_bostr, | |
2832 | const char *loc_reg_starttry, | |
f2ed9b32 | 2833 | const bool utf8_target) |
07be1b83 | 2834 | { |
786e8c11 | 2835 | const int docolor = *PL_colors[0] || *PL_colors[2] || *PL_colors[4]; |
07be1b83 | 2836 | const int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */ |
786e8c11 | 2837 | int l = (loc_regeol - locinput) > taill ? taill : (loc_regeol - locinput); |
07be1b83 YO |
2838 | /* The part of the string before starttry has one color |
2839 | (pref0_len chars), between starttry and current | |
2840 | position another one (pref_len - pref0_len chars), | |
2841 | after the current position the third one. | |
2842 | We assume that pref0_len <= pref_len, otherwise we | |
2843 | decrease pref0_len. */ | |
786e8c11 YO |
2844 | int pref_len = (locinput - loc_bostr) > (5 + taill) - l |
2845 | ? (5 + taill) - l : locinput - loc_bostr; | |
07be1b83 YO |
2846 | int pref0_len; |
2847 | ||
7918f24d NC |
2848 | PERL_ARGS_ASSERT_DUMP_EXEC_POS; |
2849 | ||
f2ed9b32 | 2850 | while (utf8_target && UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len))) |
07be1b83 | 2851 | pref_len++; |
786e8c11 YO |
2852 | pref0_len = pref_len - (locinput - loc_reg_starttry); |
2853 | if (l + pref_len < (5 + taill) && l < loc_regeol - locinput) | |
2854 | l = ( loc_regeol - locinput > (5 + taill) - pref_len | |
2855 | ? (5 + taill) - pref_len : loc_regeol - locinput); | |
f2ed9b32 | 2856 | while (utf8_target && UTF8_IS_CONTINUATION(*(U8*)(locinput + l))) |
07be1b83 YO |
2857 | l--; |
2858 | if (pref0_len < 0) | |
2859 | pref0_len = 0; | |
2860 | if (pref0_len > pref_len) | |
2861 | pref0_len = pref_len; | |
2862 | { | |
f2ed9b32 | 2863 | const int is_uni = (utf8_target && OP(scan) != CANY) ? 1 : 0; |
0df25f3d | 2864 | |
ab3bbdeb | 2865 | RE_PV_COLOR_DECL(s0,len0,is_uni,PERL_DEBUG_PAD(0), |
1de06328 | 2866 | (locinput - pref_len),pref0_len, 60, 4, 5); |
0df25f3d | 2867 | |
ab3bbdeb | 2868 | RE_PV_COLOR_DECL(s1,len1,is_uni,PERL_DEBUG_PAD(1), |
3df15adc | 2869 | (locinput - pref_len + pref0_len), |
1de06328 | 2870 | pref_len - pref0_len, 60, 2, 3); |
0df25f3d | 2871 | |
ab3bbdeb | 2872 | RE_PV_COLOR_DECL(s2,len2,is_uni,PERL_DEBUG_PAD(2), |
1de06328 | 2873 | locinput, loc_regeol - locinput, 10, 0, 1); |
0df25f3d | 2874 | |
1de06328 | 2875 | const STRLEN tlen=len0+len1+len2; |
3df15adc | 2876 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb | 2877 | "%4"IVdf" <%.*s%.*s%s%.*s>%*s|", |
786e8c11 | 2878 | (IV)(locinput - loc_bostr), |
07be1b83 | 2879 | len0, s0, |
07be1b83 | 2880 | len1, s1, |
07be1b83 | 2881 | (docolor ? "" : "> <"), |
07be1b83 | 2882 | len2, s2, |
f9f4320a | 2883 | (int)(tlen > 19 ? 0 : 19 - tlen), |
07be1b83 YO |
2884 | ""); |
2885 | } | |
2886 | } | |
3df15adc | 2887 | |
07be1b83 YO |
2888 | #endif |
2889 | ||
0a4db386 YO |
2890 | /* reg_check_named_buff_matched() |
2891 | * Checks to see if a named buffer has matched. The data array of | |
2892 | * buffer numbers corresponding to the buffer is expected to reside | |
2893 | * in the regexp->data->data array in the slot stored in the ARG() of | |
2894 | * node involved. Note that this routine doesn't actually care about the | |
2895 | * name, that information is not preserved from compilation to execution. | |
2896 | * Returns the index of the leftmost defined buffer with the given name | |
2897 | * or 0 if non of the buffers matched. | |
2898 | */ | |
2899 | STATIC I32 | |
7918f24d NC |
2900 | S_reg_check_named_buff_matched(pTHX_ const regexp *rex, const regnode *scan) |
2901 | { | |
0a4db386 | 2902 | I32 n; |
f8fc2ecf | 2903 | RXi_GET_DECL(rex,rexi); |
ad64d0ec | 2904 | SV *sv_dat= MUTABLE_SV(rexi->data->data[ ARG( scan ) ]); |
0a4db386 | 2905 | I32 *nums=(I32*)SvPVX(sv_dat); |
7918f24d NC |
2906 | |
2907 | PERL_ARGS_ASSERT_REG_CHECK_NAMED_BUFF_MATCHED; | |
2908 | ||
0a4db386 YO |
2909 | for ( n=0; n<SvIVX(sv_dat); n++ ) { |
2910 | if ((I32)*PL_reglastparen >= nums[n] && | |
f0ab9afb | 2911 | PL_regoffs[nums[n]].end != -1) |
0a4db386 YO |
2912 | { |
2913 | return nums[n]; | |
2914 | } | |
2915 | } | |
2916 | return 0; | |
2917 | } | |
2918 | ||
2f554ef7 DM |
2919 | |
2920 | /* free all slabs above current one - called during LEAVE_SCOPE */ | |
2921 | ||
2922 | STATIC void | |
2923 | S_clear_backtrack_stack(pTHX_ void *p) | |
2924 | { | |
2925 | regmatch_slab *s = PL_regmatch_slab->next; | |
2926 | PERL_UNUSED_ARG(p); | |
2927 | ||
2928 | if (!s) | |
2929 | return; | |
2930 | PL_regmatch_slab->next = NULL; | |
2931 | while (s) { | |
2932 | regmatch_slab * const osl = s; | |
2933 | s = s->next; | |
2934 | Safefree(osl); | |
2935 | } | |
2936 | } | |
2937 | ||
2938 | ||
28d8d7f4 YO |
2939 | #define SETREX(Re1,Re2) \ |
2940 | if (PL_reg_eval_set) PM_SETRE((PL_reg_curpm), (Re2)); \ | |
2941 | Re1 = (Re2) | |
2942 | ||
d6a28714 | 2943 | STATIC I32 /* 0 failure, 1 success */ |
24b23f37 | 2944 | S_regmatch(pTHX_ regmatch_info *reginfo, regnode *prog) |
d6a28714 | 2945 | { |
a35a87e7 | 2946 | #if PERL_VERSION < 9 && !defined(PERL_CORE) |
54df2634 NC |
2947 | dMY_CXT; |
2948 | #endif | |
27da23d5 | 2949 | dVAR; |
f2ed9b32 | 2950 | register const bool utf8_target = PL_reg_match_utf8; |
4ad0818d | 2951 | const U32 uniflags = UTF8_ALLOW_DEFAULT; |
288b8c02 NC |
2952 | REGEXP *rex_sv = reginfo->prog; |
2953 | regexp *rex = (struct regexp *)SvANY(rex_sv); | |
f8fc2ecf | 2954 | RXi_GET_DECL(rex,rexi); |
2f554ef7 | 2955 | I32 oldsave; |
5d9a96ca DM |
2956 | /* the current state. This is a cached copy of PL_regmatch_state */ |
2957 | register regmatch_state *st; | |
5d9a96ca DM |
2958 | /* cache heavy used fields of st in registers */ |
2959 | register regnode *scan; | |
2960 | register regnode *next; | |
438e9bae | 2961 | register U32 n = 0; /* general value; init to avoid compiler warning */ |
24d3c4a9 | 2962 | register I32 ln = 0; /* len or last; init to avoid compiler warning */ |
5d9a96ca | 2963 | register char *locinput = PL_reginput; |
5d9a96ca | 2964 | register I32 nextchr; /* is always set to UCHARAT(locinput) */ |
24d3c4a9 | 2965 | |
b69b0499 | 2966 | bool result = 0; /* return value of S_regmatch */ |
24d3c4a9 | 2967 | int depth = 0; /* depth of backtrack stack */ |
4b196cd4 YO |
2968 | U32 nochange_depth = 0; /* depth of GOSUB recursion with nochange */ |
2969 | const U32 max_nochange_depth = | |
2970 | (3 * rex->nparens > MAX_RECURSE_EVAL_NOCHANGE_DEPTH) ? | |
2971 | 3 * rex->nparens : MAX_RECURSE_EVAL_NOCHANGE_DEPTH; | |
77cb431f DM |
2972 | regmatch_state *yes_state = NULL; /* state to pop to on success of |
2973 | subpattern */ | |
e2e6a0f1 YO |
2974 | /* mark_state piggy backs on the yes_state logic so that when we unwind |
2975 | the stack on success we can update the mark_state as we go */ | |
2976 | regmatch_state *mark_state = NULL; /* last mark state we have seen */ | |
faec1544 | 2977 | regmatch_state *cur_eval = NULL; /* most recent EVAL_AB state */ |
b8591aee | 2978 | struct regmatch_state *cur_curlyx = NULL; /* most recent curlyx */ |
40a82448 | 2979 | U32 state_num; |
5d458dd8 YO |
2980 | bool no_final = 0; /* prevent failure from backtracking? */ |
2981 | bool do_cutgroup = 0; /* no_final only until next branch/trie entry */ | |
e2e6a0f1 | 2982 | char *startpoint = PL_reginput; |
5d458dd8 YO |
2983 | SV *popmark = NULL; /* are we looking for a mark? */ |
2984 | SV *sv_commit = NULL; /* last mark name seen in failure */ | |
2985 | SV *sv_yes_mark = NULL; /* last mark name we have seen | |
2986 | during a successfull match */ | |
2987 | U32 lastopen = 0; /* last open we saw */ | |
2988 | bool has_cutgroup = RX_HAS_CUTGROUP(rex) ? 1 : 0; | |
19b95bf0 | 2989 | SV* const oreplsv = GvSV(PL_replgv); |
24d3c4a9 DM |
2990 | /* these three flags are set by various ops to signal information to |
2991 | * the very next op. They have a useful lifetime of exactly one loop | |
2992 | * iteration, and are not preserved or restored by state pushes/pops | |
2993 | */ | |
2994 | bool sw = 0; /* the condition value in (?(cond)a|b) */ | |
2995 | bool minmod = 0; /* the next "{n,m}" is a "{n,m}?" */ | |
2996 | int logical = 0; /* the following EVAL is: | |
2997 | 0: (?{...}) | |
2998 | 1: (?(?{...})X|Y) | |
2999 | 2: (??{...}) | |
3000 | or the following IFMATCH/UNLESSM is: | |
3001 | false: plain (?=foo) | |
3002 | true: used as a condition: (?(?=foo)) | |
3003 | */ | |
95b24440 | 3004 | #ifdef DEBUGGING |
e68ec53f | 3005 | GET_RE_DEBUG_FLAGS_DECL; |
d6a28714 JH |
3006 | #endif |
3007 | ||
7918f24d NC |
3008 | PERL_ARGS_ASSERT_REGMATCH; |
3009 | ||
3b57cd43 | 3010 | DEBUG_OPTIMISE_r( DEBUG_EXECUTE_r({ |
24b23f37 | 3011 | PerlIO_printf(Perl_debug_log,"regmatch start\n"); |
3b57cd43 | 3012 | })); |
5d9a96ca DM |
3013 | /* on first ever call to regmatch, allocate first slab */ |
3014 | if (!PL_regmatch_slab) { | |
3015 | Newx(PL_regmatch_slab, 1, regmatch_slab); | |
3016 | PL_regmatch_slab->prev = NULL; | |
3017 | PL_regmatch_slab->next = NULL; | |
86545054 | 3018 | PL_regmatch_state = SLAB_FIRST(PL_regmatch_slab); |
5d9a96ca DM |
3019 | } |
3020 | ||
2f554ef7 DM |
3021 | oldsave = PL_savestack_ix; |
3022 | SAVEDESTRUCTOR_X(S_clear_backtrack_stack, NULL); | |
3023 | SAVEVPTR(PL_regmatch_slab); | |
3024 | SAVEVPTR(PL_regmatch_state); | |
5d9a96ca DM |
3025 | |
3026 | /* grab next free state slot */ | |
3027 | st = ++PL_regmatch_state; | |
86545054 | 3028 | if (st > SLAB_LAST(PL_regmatch_slab)) |
5d9a96ca DM |
3029 | st = PL_regmatch_state = S_push_slab(aTHX); |
3030 | ||
d6a28714 JH |
3031 | /* Note that nextchr is a byte even in UTF */ |
3032 | nextchr = UCHARAT(locinput); | |
3033 | scan = prog; | |
3034 | while (scan != NULL) { | |
8ba1375e | 3035 | |
a3621e74 | 3036 | DEBUG_EXECUTE_r( { |
6136c704 | 3037 | SV * const prop = sv_newmortal(); |
1de06328 | 3038 | regnode *rnext=regnext(scan); |
f2ed9b32 | 3039 | DUMP_EXEC_POS( locinput, scan, utf8_target ); |
32fc9b6a | 3040 | regprop(rex, prop, scan); |
07be1b83 YO |
3041 | |
3042 | PerlIO_printf(Perl_debug_log, | |
3043 | "%3"IVdf":%*s%s(%"IVdf")\n", | |
f8fc2ecf | 3044 | (IV)(scan - rexi->program), depth*2, "", |
07be1b83 | 3045 | SvPVX_const(prop), |
1de06328 | 3046 | (PL_regkind[OP(scan)] == END || !rnext) ? |
f8fc2ecf | 3047 | 0 : (IV)(rnext - rexi->program)); |
2a782b5b | 3048 | }); |
d6a28714 JH |
3049 | |
3050 | next = scan + NEXT_OFF(scan); | |
3051 | if (next == scan) | |
3052 | next = NULL; | |
40a82448 | 3053 | state_num = OP(scan); |
d6a28714 | 3054 | |
40a82448 | 3055 | reenter_switch: |
34a81e2b B |
3056 | |
3057 | assert(PL_reglastparen == &rex->lastparen); | |
3058 | assert(PL_reglastcloseparen == &rex->lastcloseparen); | |
3059 | assert(PL_regoffs == rex->offs); | |
3060 | ||
40a82448 | 3061 | switch (state_num) { |
d6a28714 | 3062 | case BOL: |
7fba1cd6 | 3063 | if (locinput == PL_bostr) |
d6a28714 | 3064 | { |
3b0527fe | 3065 | /* reginfo->till = reginfo->bol; */ |
b8c5462f JH |
3066 | break; |
3067 | } | |
d6a28714 JH |
3068 | sayNO; |
3069 | case MBOL: | |
12d33761 HS |
3070 | if (locinput == PL_bostr || |
3071 | ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n')) | |
d6a28714 | 3072 | { |
b8c5462f JH |
3073 | break; |
3074 | } | |
d6a28714 JH |
3075 | sayNO; |
3076 | case SBOL: | |
c2a73568 | 3077 | if (locinput == PL_bostr) |
b8c5462f | 3078 | break; |
d6a28714 JH |
3079 | sayNO; |
3080 | case GPOS: | |
3b0527fe | 3081 | if (locinput == reginfo->ganch) |
d6a28714 JH |
3082 | break; |
3083 | sayNO; | |
ee9b8eae YO |
3084 | |
3085 | case KEEPS: | |
3086 | /* update the startpoint */ | |
f0ab9afb | 3087 | st->u.keeper.val = PL_regoffs[0].start; |
ee9b8eae | 3088 | PL_reginput = locinput; |
f0ab9afb | 3089 | PL_regoffs[0].start = locinput - PL_bostr; |
ee9b8eae YO |
3090 | PUSH_STATE_GOTO(KEEPS_next, next); |
3091 | /*NOT-REACHED*/ | |
3092 | case KEEPS_next_fail: | |
3093 | /* rollback the start point change */ | |
f0ab9afb | 3094 | PL_regoffs[0].start = st->u.keeper.val; |
ee9b8eae YO |
3095 | sayNO_SILENT; |
3096 | /*NOT-REACHED*/ | |
d6a28714 | 3097 | case EOL: |
d6a28714 JH |
3098 | goto seol; |
3099 | case MEOL: | |
d6a28714 | 3100 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') |
b8c5462f | 3101 | sayNO; |
b8c5462f | 3102 | break; |
d6a28714 JH |
3103 | case SEOL: |
3104 | seol: | |
3105 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') | |
b8c5462f | 3106 | sayNO; |
d6a28714 | 3107 | if (PL_regeol - locinput > 1) |
b8c5462f | 3108 | sayNO; |
b8c5462f | 3109 | break; |
d6a28714 JH |
3110 | case EOS: |
3111 | if (PL_regeol != locinput) | |
b8c5462f | 3112 | sayNO; |
d6a28714 | 3113 | break; |
ffc61ed2 | 3114 | case SANY: |
d6a28714 | 3115 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 | 3116 | sayNO; |
f2ed9b32 | 3117 | if (utf8_target) { |
f33976b4 DB |
3118 | locinput += PL_utf8skip[nextchr]; |
3119 | if (locinput > PL_regeol) | |
3120 | sayNO; | |
3121 | nextchr = UCHARAT(locinput); | |
3122 | } | |
3123 | else | |
3124 | nextchr = UCHARAT(++locinput); | |
3125 | break; | |
3126 | case CANY: | |
3127 | if (!nextchr && locinput >= PL_regeol) | |
3128 | sayNO; | |
b8c5462f | 3129 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 3130 | break; |
ffc61ed2 | 3131 | case REG_ANY: |
1aa99e6b IH |
3132 | if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n') |
3133 | sayNO; | |
f2ed9b32 | 3134 | if (utf8_target) { |
b8c5462f | 3135 | locinput += PL_utf8skip[nextchr]; |
d6a28714 JH |
3136 | if (locinput > PL_regeol) |
3137 | sayNO; | |
a0ed51b3 | 3138 | nextchr = UCHARAT(locinput); |
a0ed51b3 | 3139 | } |
1aa99e6b IH |
3140 | else |
3141 | nextchr = UCHARAT(++locinput); | |
a0ed51b3 | 3142 | break; |
166ba7cd DM |
3143 | |
3144 | #undef ST | |
3145 | #define ST st->u.trie | |
786e8c11 YO |
3146 | case TRIEC: |
3147 | /* In this case the charclass data is available inline so | |
3148 | we can fail fast without a lot of extra overhead. | |
3149 | */ | |
f2ed9b32 | 3150 | if (scan->flags == EXACT || !utf8_target) { |
786e8c11 YO |
3151 | if(!ANYOF_BITMAP_TEST(scan, *locinput)) { |
3152 | DEBUG_EXECUTE_r( | |
3153 | PerlIO_printf(Perl_debug_log, | |
3154 | "%*s %sfailed to match trie start class...%s\n", | |
5bc10b2c | 3155 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]) |
786e8c11 YO |
3156 | ); |
3157 | sayNO_SILENT; | |
3158 | /* NOTREACHED */ | |
3159 | } | |
3160 | } | |
3161 | /* FALL THROUGH */ | |
5b47454d | 3162 | case TRIE: |
2e64971a DM |
3163 | /* the basic plan of execution of the trie is: |
3164 | * At the beginning, run though all the states, and | |
3165 | * find the longest-matching word. Also remember the position | |
3166 | * of the shortest matching word. For example, this pattern: | |
3167 | * 1 2 3 4 5 | |
3168 | * ab|a|x|abcd|abc | |
3169 | * when matched against the string "abcde", will generate | |
3170 | * accept states for all words except 3, with the longest | |
3171 | * matching word being 4, and the shortest being 1 (with | |
3172 | * the position being after char 1 of the string). | |
3173 | * | |
3174 | * Then for each matching word, in word order (i.e. 1,2,4,5), | |
3175 | * we run the remainder of the pattern; on each try setting | |
3176 | * the current position to the character following the word, | |
3177 | * returning to try the next word on failure. | |
3178 | * | |
3179 | * We avoid having to build a list of words at runtime by | |
3180 | * using a compile-time structure, wordinfo[].prev, which | |
3181 | * gives, for each word, the previous accepting word (if any). | |
3182 | * In the case above it would contain the mappings 1->2, 2->0, | |
3183 | * 3->0, 4->5, 5->1. We can use this table to generate, from | |
3184 | * the longest word (4 above), a list of all words, by | |
3185 | * following the list of prev pointers; this gives us the | |
3186 | * unordered list 4,5,1,2. Then given the current word we have | |
3187 | * just tried, we can go through the list and find the | |
3188 | * next-biggest word to try (so if we just failed on word 2, | |
3189 | * the next in the list is 4). | |
3190 | * | |
3191 | * Since at runtime we don't record the matching position in | |
3192 | * the string for each word, we have to work that out for | |
3193 | * each word we're about to process. The wordinfo table holds | |
3194 | * the character length of each word; given that we recorded | |
3195 | * at the start: the position of the shortest word and its | |
3196 | * length in chars, we just need to move the pointer the | |
3197 | * difference between the two char lengths. Depending on | |
3198 | * Unicode status and folding, that's cheap or expensive. | |
3199 | * | |
3200 | * This algorithm is optimised for the case where are only a | |
3201 | * small number of accept states, i.e. 0,1, or maybe 2. | |
3202 | * With lots of accepts states, and having to try all of them, | |
3203 | * it becomes quadratic on number of accept states to find all | |
3204 | * the next words. | |
3205 | */ | |
3206 | ||
3dab1dad | 3207 | { |
07be1b83 | 3208 | /* what type of TRIE am I? (utf8 makes this contextual) */ |
a0a388a1 | 3209 | DECL_TRIE_TYPE(scan); |
3dab1dad YO |
3210 | |
3211 | /* what trie are we using right now */ | |
be8e71aa | 3212 | reg_trie_data * const trie |
f8fc2ecf | 3213 | = (reg_trie_data*)rexi->data->data[ ARG( scan ) ]; |
85fbaab2 | 3214 | HV * widecharmap = MUTABLE_HV(rexi->data->data[ ARG( scan ) + 1 ]); |
3dab1dad | 3215 | U32 state = trie->startstate; |
166ba7cd | 3216 | |
3dab1dad YO |
3217 | if (trie->bitmap && trie_type != trie_utf8_fold && |
3218 | !TRIE_BITMAP_TEST(trie,*locinput) | |
3219 | ) { | |
3220 | if (trie->states[ state ].wordnum) { | |
3221 | DEBUG_EXECUTE_r( | |
3222 | PerlIO_printf(Perl_debug_log, | |
3223 | "%*s %smatched empty string...%s\n", | |
5bc10b2c | 3224 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]) |
3dab1dad | 3225 | ); |
20dbff7c YO |
3226 | if (!trie->jump) |
3227 | break; | |
3dab1dad YO |
3228 | } else { |
3229 | DEBUG_EXECUTE_r( | |
3230 | PerlIO_printf(Perl_debug_log, | |
786e8c11 | 3231 | "%*s %sfailed to match trie start class...%s\n", |
5bc10b2c | 3232 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]) |
3dab1dad YO |
3233 | ); |
3234 | sayNO_SILENT; | |
3235 | } | |
3236 | } | |
166ba7cd | 3237 | |
786e8c11 YO |
3238 | { |
3239 | U8 *uc = ( U8* )locinput; | |
3240 | ||
3241 | STRLEN len = 0; | |
3242 | STRLEN foldlen = 0; | |
3243 | U8 *uscan = (U8*)NULL; | |
786e8c11 | 3244 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; |
2e64971a DM |
3245 | U32 charcount = 0; /* how many input chars we have matched */ |
3246 | U32 accepted = 0; /* have we seen any accepting states? */ | |
786e8c11 | 3247 | |
786e8c11 YO |
3248 | ST.B = next; |
3249 | ST.jump = trie->jump; | |
786e8c11 | 3250 | ST.me = scan; |
2e64971a DM |
3251 | ST.firstpos = NULL; |
3252 | ST.longfold = FALSE; /* char longer if folded => it's harder */ | |
3253 | ST.nextword = 0; | |
3254 | ||
3255 | /* fully traverse the TRIE; note the position of the | |
3256 | shortest accept state and the wordnum of the longest | |
3257 | accept state */ | |
07be1b83 | 3258 | |
a3621e74 | 3259 | while ( state && uc <= (U8*)PL_regeol ) { |
786e8c11 | 3260 | U32 base = trie->states[ state ].trans.base; |
f9f4320a | 3261 | UV uvc = 0; |
acb909b4 | 3262 | U16 charid = 0; |
2e64971a DM |
3263 | U16 wordnum; |
3264 | wordnum = trie->states[ state ].wordnum; | |
3265 | ||
3266 | if (wordnum) { /* it's an accept state */ | |
3267 | if (!accepted) { | |
3268 | accepted = 1; | |
3269 | /* record first match position */ | |
3270 | if (ST.longfold) { | |
3271 | ST.firstpos = (U8*)locinput; | |
3272 | ST.firstchars = 0; | |
5b47454d | 3273 | } |
2e64971a DM |
3274 | else { |
3275 | ST.firstpos = uc; | |
3276 | ST.firstchars = charcount; | |
3277 | } | |
3278 | } | |
3279 | if (!ST.nextword || wordnum < ST.nextword) | |
3280 | ST.nextword = wordnum; | |
3281 | ST.topword = wordnum; | |
786e8c11 | 3282 | } |
a3621e74 | 3283 | |
07be1b83 | 3284 | DEBUG_TRIE_EXECUTE_r({ |
f2ed9b32 | 3285 | DUMP_EXEC_POS( (char *)uc, scan, utf8_target ); |
a3621e74 | 3286 | PerlIO_printf( Perl_debug_log, |
2e64971a | 3287 | "%*s %sState: %4"UVxf" Accepted: %c ", |
5bc10b2c | 3288 | 2+depth * 2, "", PL_colors[4], |
2e64971a | 3289 | (UV)state, (accepted ? 'Y' : 'N')); |
07be1b83 | 3290 | }); |
a3621e74 | 3291 | |
2e64971a | 3292 | /* read a char and goto next state */ |
a3621e74 | 3293 | if ( base ) { |
6dd2be57 | 3294 | I32 offset; |
55eed653 NC |
3295 | REXEC_TRIE_READ_CHAR(trie_type, trie, widecharmap, uc, |
3296 | uscan, len, uvc, charid, foldlen, | |
3297 | foldbuf, uniflags); | |
2e64971a DM |
3298 | charcount++; |
3299 | if (foldlen>0) | |
3300 | ST.longfold = TRUE; | |
5b47454d | 3301 | if (charid && |
6dd2be57 DM |
3302 | ( ((offset = |
3303 | base + charid - 1 - trie->uniquecharcount)) >= 0) | |
3304 | ||
3305 | && ((U32)offset < trie->lasttrans) | |
3306 | && trie->trans[offset].check == state) | |
5b47454d | 3307 | { |
6dd2be57 | 3308 | state = trie->trans[offset].next; |
5b47454d DM |
3309 | } |
3310 | else { | |
3311 | state = 0; | |
3312 | } | |
3313 | uc += len; | |
3314 | ||
3315 | } | |
3316 | else { | |
a3621e74 YO |
3317 | state = 0; |
3318 | } | |
3319 | DEBUG_TRIE_EXECUTE_r( | |
e4584336 | 3320 | PerlIO_printf( Perl_debug_log, |
786e8c11 | 3321 | "Charid:%3x CP:%4"UVxf" After State: %4"UVxf"%s\n", |
e4584336 | 3322 | charid, uvc, (UV)state, PL_colors[5] ); |
a3621e74 YO |
3323 | ); |
3324 | } | |
2e64971a | 3325 | if (!accepted) |
a3621e74 | 3326 | sayNO; |
a3621e74 | 3327 | |
2e64971a DM |
3328 | /* calculate total number of accept states */ |
3329 | { | |
3330 | U16 w = ST.topword; | |
3331 | accepted = 0; | |
3332 | while (w) { | |
3333 | w = trie->wordinfo[w].prev; | |
3334 | accepted++; | |
3335 | } | |
3336 | ST.accepted = accepted; | |
3337 | } | |
3338 | ||
166ba7cd DM |
3339 | DEBUG_EXECUTE_r( |
3340 | PerlIO_printf( Perl_debug_log, | |
3341 | "%*s %sgot %"IVdf" possible matches%s\n", | |
5bc10b2c | 3342 | REPORT_CODE_OFF + depth * 2, "", |
166ba7cd DM |
3343 | PL_colors[4], (IV)ST.accepted, PL_colors[5] ); |
3344 | ); | |
2e64971a | 3345 | goto trie_first_try; /* jump into the fail handler */ |
786e8c11 | 3346 | }} |
fae667d5 | 3347 | /* NOTREACHED */ |
2e64971a DM |
3348 | |
3349 | case TRIE_next_fail: /* we failed - try next alternative */ | |
fae667d5 YO |
3350 | if ( ST.jump) { |
3351 | REGCP_UNWIND(ST.cp); | |
3352 | for (n = *PL_reglastparen; n > ST.lastparen; n--) | |
f0ab9afb | 3353 | PL_regoffs[n].end = -1; |
fae667d5 YO |
3354 | *PL_reglastparen = n; |
3355 | } | |
2e64971a DM |
3356 | if (!--ST.accepted) { |
3357 | DEBUG_EXECUTE_r({ | |
3358 | PerlIO_printf( Perl_debug_log, | |
3359 | "%*s %sTRIE failed...%s\n", | |
3360 | REPORT_CODE_OFF+depth*2, "", | |
3361 | PL_colors[4], | |
3362 | PL_colors[5] ); | |
3363 | }); | |
3364 | sayNO_SILENT; | |
3365 | } | |
3366 | { | |
3367 | /* Find next-highest word to process. Note that this code | |
3368 | * is O(N^2) per trie run (O(N) per branch), so keep tight */ | |
d9a396a3 DM |
3369 | register U16 min = 0; |
3370 | register U16 word; | |
2e64971a DM |
3371 | register U16 const nextword = ST.nextword; |
3372 | register reg_trie_wordinfo * const wordinfo | |
3373 | = ((reg_trie_data*)rexi->data->data[ARG(ST.me)])->wordinfo; | |
3374 | for (word=ST.topword; word; word=wordinfo[word].prev) { | |
3375 | if (word > nextword && (!min || word < min)) | |
3376 | min = word; | |
3377 | } | |
3378 | ST.nextword = min; | |
3379 | } | |
3380 | ||
fae667d5 | 3381 | trie_first_try: |
5d458dd8 YO |
3382 | if (do_cutgroup) { |
3383 | do_cutgroup = 0; | |
3384 | no_final = 0; | |
3385 | } | |
fae667d5 YO |
3386 | |
3387 | if ( ST.jump) { | |
3388 | ST.lastparen = *PL_reglastparen; | |
3389 | REGCP_SET(ST.cp); | |
2e64971a | 3390 | } |
a3621e74 | 3391 | |
2e64971a | 3392 | /* find start char of end of current word */ |
166ba7cd | 3393 | { |
2e64971a DM |
3394 | U32 chars; /* how many chars to skip */ |
3395 | U8 *uc = ST.firstpos; | |
3396 | reg_trie_data * const trie | |
3397 | = (reg_trie_data*)rexi->data->data[ARG(ST.me)]; | |
3398 | ||
3399 | assert((trie->wordinfo[ST.nextword].len - trie->prefixlen) | |
3400 | >= ST.firstchars); | |
3401 | chars = (trie->wordinfo[ST.nextword].len - trie->prefixlen) | |
3402 | - ST.firstchars; | |
3403 | ||
3404 | if (ST.longfold) { | |
3405 | /* the hard option - fold each char in turn and find | |
3406 | * its folded length (which may be different */ | |
3407 | U8 foldbuf[UTF8_MAXBYTES_CASE + 1]; | |
3408 | STRLEN foldlen; | |
3409 | STRLEN len; | |
d9a396a3 | 3410 | UV uvc; |
2e64971a DM |
3411 | U8 *uscan; |
3412 | ||
3413 | while (chars) { | |
f2ed9b32 | 3414 | if (utf8_target) { |
2e64971a DM |
3415 | uvc = utf8n_to_uvuni((U8*)uc, UTF8_MAXLEN, &len, |
3416 | uniflags); | |
3417 | uc += len; | |
3418 | } | |
3419 | else { | |
3420 | uvc = *uc; | |
3421 | uc++; | |
3422 | } | |
3423 | uvc = to_uni_fold(uvc, foldbuf, &foldlen); | |
3424 | uscan = foldbuf; | |
3425 | while (foldlen) { | |
3426 | if (!--chars) | |
3427 | break; | |
3428 | uvc = utf8n_to_uvuni(uscan, UTF8_MAXLEN, &len, | |
3429 | uniflags); | |
3430 | uscan += len; | |
3431 | foldlen -= len; | |
3432 | } | |
3433 | } | |
a3621e74 | 3434 | } |
2e64971a | 3435 | else { |
f2ed9b32 | 3436 | if (utf8_target) |
2e64971a DM |
3437 | while (chars--) |
3438 | uc += UTF8SKIP(uc); | |
3439 | else | |
3440 | uc += chars; | |
3441 | } | |
3442 | PL_reginput = (char *)uc; | |
3443 | } | |
166ba7cd | 3444 | |
2e64971a DM |
3445 | scan = (ST.jump && ST.jump[ST.nextword]) |
3446 | ? ST.me + ST.jump[ST.nextword] | |
3447 | : ST.B; | |
166ba7cd | 3448 | |
2e64971a DM |
3449 | DEBUG_EXECUTE_r({ |
3450 | PerlIO_printf( Perl_debug_log, | |
3451 | "%*s %sTRIE matched word #%d, continuing%s\n", | |
3452 | REPORT_CODE_OFF+depth*2, "", | |
3453 | PL_colors[4], | |
3454 | ST.nextword, | |
3455 | PL_colors[5] | |
3456 | ); | |
3457 | }); | |
3458 | ||
3459 | if (ST.accepted > 1 || has_cutgroup) { | |
3460 | PUSH_STATE_GOTO(TRIE_next, scan); | |
3461 | /* NOTREACHED */ | |
166ba7cd | 3462 | } |
2e64971a DM |
3463 | /* only one choice left - just continue */ |
3464 | DEBUG_EXECUTE_r({ | |
3465 | AV *const trie_words | |
3466 | = MUTABLE_AV(rexi->data->data[ARG(ST.me)+TRIE_WORDS_OFFSET]); | |
3467 | SV ** const tmp = av_fetch( trie_words, | |
3468 | ST.nextword-1, 0 ); | |
3469 | SV *sv= tmp ? sv_newmortal() : NULL; | |
3470 | ||
3471 | PerlIO_printf( Perl_debug_log, | |
3472 | "%*s %sonly one match left, short-circuiting: #%d <%s>%s\n", | |
3473 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], | |
3474 | ST.nextword, | |
3475 | tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0, | |
3476 | PL_colors[0], PL_colors[1], | |
3477 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | |
3478 | ) | |
3479 | : "not compiled under -Dr", | |
3480 | PL_colors[5] ); | |
3481 | }); | |
3482 | ||
3483 | locinput = PL_reginput; | |
3484 | nextchr = UCHARAT(locinput); | |
3485 | continue; /* execute rest of RE */ | |
166ba7cd | 3486 | /* NOTREACHED */ |
166ba7cd DM |
3487 | #undef ST |
3488 | ||
95b24440 DM |
3489 | case EXACT: { |
3490 | char *s = STRING(scan); | |
24d3c4a9 | 3491 | ln = STR_LEN(scan); |
f2ed9b32 | 3492 | if (utf8_target != UTF_PATTERN) { |
bc517b45 | 3493 | /* The target and the pattern have differing utf8ness. */ |
1aa99e6b | 3494 | char *l = locinput; |
24d3c4a9 | 3495 | const char * const e = s + ln; |
a72c7584 | 3496 | |
f2ed9b32 | 3497 | if (utf8_target) { |
5ff6fc6d | 3498 | /* The target is utf8, the pattern is not utf8. */ |
1aa99e6b | 3499 | while (s < e) { |
a3b680e6 | 3500 | STRLEN ulen; |
1aa99e6b | 3501 | if (l >= PL_regeol) |
5ff6fc6d JH |
3502 | sayNO; |
3503 | if (NATIVE_TO_UNI(*(U8*)s) != | |
89ebb4a3 | 3504 | utf8n_to_uvuni((U8*)l, UTF8_MAXBYTES, &ulen, |
041457d9 | 3505 | uniflags)) |
5ff6fc6d | 3506 | sayNO; |
bc517b45 | 3507 | l += ulen; |
5ff6fc6d | 3508 | s ++; |
1aa99e6b | 3509 | } |
5ff6fc6d JH |
3510 | } |
3511 | else { | |
3512 | /* The target is not utf8, the pattern is utf8. */ | |
1aa99e6b | 3513 | while (s < e) { |
a3b680e6 | 3514 | STRLEN ulen; |
1aa99e6b IH |
3515 | if (l >= PL_regeol) |
3516 | sayNO; | |
5ff6fc6d | 3517 | if (NATIVE_TO_UNI(*((U8*)l)) != |
89ebb4a3 | 3518 | utf8n_to_uvuni((U8*)s, UTF8_MAXBYTES, &ulen, |
041457d9 | 3519 | uniflags)) |
1aa99e6b | 3520 | sayNO; |
bc517b45 | 3521 | s += ulen; |
a72c7584 | 3522 | l ++; |
1aa99e6b | 3523 | } |
5ff6fc6d | 3524 | } |
1aa99e6b IH |
3525 | locinput = l; |
3526 | nextchr = UCHARAT(locinput); | |
3527 | break; | |
3528 | } | |
bc517b45 | 3529 | /* The target and the pattern have the same utf8ness. */ |
d6a28714 JH |
3530 | /* Inline the first character, for speed. */ |
3531 | if (UCHARAT(s) != nextchr) | |
3532 | sayNO; | |
24d3c4a9 | 3533 | if (PL_regeol - locinput < ln) |
d6a28714 | 3534 | sayNO; |
24d3c4a9 | 3535 | if (ln > 1 && memNE(s, locinput, ln)) |
d6a28714 | 3536 | sayNO; |
24d3c4a9 | 3537 | locinput += ln; |
d6a28714 JH |
3538 | nextchr = UCHARAT(locinput); |
3539 | break; | |
95b24440 | 3540 | } |
d6a28714 | 3541 | case EXACTFL: |
b8c5462f JH |
3542 | PL_reg_flags |= RF_tainted; |
3543 | /* FALL THROUGH */ | |
95b24440 | 3544 | case EXACTF: { |
be8e71aa | 3545 | char * const s = STRING(scan); |
24d3c4a9 | 3546 | ln = STR_LEN(scan); |
d6a28714 | 3547 | |
f2ed9b32 | 3548 | if (utf8_target || UTF_PATTERN) { |
d07ddd77 | 3549 | /* Either target or the pattern are utf8. */ |
be8e71aa | 3550 | const char * const l = locinput; |
d07ddd77 | 3551 | char *e = PL_regeol; |
bc517b45 | 3552 | |
f2ed9b32 KW |
3553 | if (! foldEQ_utf8(s, 0, ln, cBOOL(UTF_PATTERN), |
3554 | l, &e, 0, utf8_target)) { | |
5486206c JH |
3555 | /* One more case for the sharp s: |
3556 | * pack("U0U*", 0xDF) =~ /ss/i, | |
3557 | * the 0xC3 0x9F are the UTF-8 | |
3558 | * byte sequence for the U+00DF. */ | |
e1d1eefb | 3559 | |
f2ed9b32 | 3560 | if (!(utf8_target && |
e1d1eefb | 3561 | toLOWER(s[0]) == 's' && |
24d3c4a9 | 3562 | ln >= 2 && |
5486206c JH |
3563 | toLOWER(s[1]) == 's' && |
3564 | (U8)l[0] == 0xC3 && | |
3565 | e - l >= 2 && | |
3566 | (U8)l[1] == 0x9F)) | |
3567 | sayNO; | |
3568 | } | |
d07ddd77 JH |
3569 | locinput = e; |
3570 | nextchr = UCHARAT(locinput); | |
3571 | break; | |
a0ed51b3 | 3572 | } |
d6a28714 | 3573 | |
bc517b45 JH |
3574 | /* Neither the target and the pattern are utf8. */ |
3575 | ||
d6a28714 JH |
3576 | /* Inline the first character, for speed. */ |
3577 | if (UCHARAT(s) != nextchr && | |
3578 | UCHARAT(s) != ((OP(scan) == EXACTF) | |
3579 | ? PL_fold : PL_fold_locale)[nextchr]) | |
a0ed51b3 | 3580 | sayNO; |
24d3c4a9 | 3581 | if (PL_regeol - locinput < ln) |
b8c5462f | 3582 | sayNO; |
24d3c4a9 | 3583 | if (ln > 1 && (OP(scan) == EXACTF |
4c1b470c KW |
3584 | ? ! foldEQ(s, locinput, ln) |
3585 | : ! foldEQ_locale(s, locinput, ln))) | |
4633a7c4 | 3586 | sayNO; |
24d3c4a9 | 3587 | locinput += ln; |
d6a28714 | 3588 | nextchr = UCHARAT(locinput); |
a0d0e21e | 3589 | break; |
95b24440 | 3590 | } |
b2680017 YO |
3591 | case BOUNDL: |
3592 | case NBOUNDL: | |
3593 | PL_reg_flags |= RF_tainted; | |
3594 | /* FALL THROUGH */ | |
3595 | case BOUND: | |
3596 | case NBOUND: | |
3597 | /* was last char in word? */ | |
f2ed9b32 | 3598 | if (utf8_target) { |
b2680017 YO |
3599 | if (locinput == PL_bostr) |
3600 | ln = '\n'; | |
3601 | else { | |
3602 | const U8 * const r = reghop3((U8*)locinput, -1, (U8*)PL_bostr); | |
3603 | ||
3604 | ln = utf8n_to_uvchr(r, UTF8SKIP(r), 0, uniflags); | |
3605 | } | |
3606 | if (OP(scan) == BOUND || OP(scan) == NBOUND) { | |
3607 | ln = isALNUM_uni(ln); | |
3608 | LOAD_UTF8_CHARCLASS_ALNUM(); | |
f2ed9b32 | 3609 | n = swash_fetch(PL_utf8_alnum, (U8*)locinput, utf8_target); |
b2680017 YO |
3610 | } |
3611 | else { | |
3612 | ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln)); | |
3613 | n = isALNUM_LC_utf8((U8*)locinput); | |
3614 | } | |
3615 | } | |
3616 | else { | |
3617 | ln = (locinput != PL_bostr) ? | |
3618 | UCHARAT(locinput - 1) : '\n'; | |
a12cf05f KW |
3619 | if (FLAGS(scan) & USE_UNI) { |
3620 | ||
3621 | /* Here, can't be BOUNDL or NBOUNDL because they never set | |
3622 | * the flags to USE_UNI */ | |
3623 | ln = isWORDCHAR_L1(ln); | |
3624 | n = isWORDCHAR_L1(nextchr); | |
3625 | } | |
3626 | else if (OP(scan) == BOUND || OP(scan) == NBOUND) { | |
b2680017 YO |
3627 | ln = isALNUM(ln); |
3628 | n = isALNUM(nextchr); | |
3629 | } | |
3630 | else { | |
3631 | ln = isALNUM_LC(ln); | |
3632 | n = isALNUM_LC(nextchr); | |
3633 | } | |
3634 | } | |
3635 | if (((!ln) == (!n)) == (OP(scan) == BOUND || | |
3636 | OP(scan) == BOUNDL)) | |
3637 | sayNO; | |
3638 | break; | |
d6a28714 | 3639 | case ANYOF: |
f2ed9b32 | 3640 | if (utf8_target) { |
9e55ce06 | 3641 | STRLEN inclasslen = PL_regeol - locinput; |
20ed0b26 KW |
3642 | if (locinput >= PL_regeol) |
3643 | sayNO; | |
9e55ce06 | 3644 | |
f2ed9b32 | 3645 | if (!reginclass(rex, scan, (U8*)locinput, &inclasslen, utf8_target)) |
262b90c4 | 3646 | goto anyof_fail; |
b32d7d3e | 3647 | locinput += inclasslen; |
b8c5462f | 3648 | nextchr = UCHARAT(locinput); |
e0f9d4a8 | 3649 | break; |
ffc61ed2 JH |
3650 | } |
3651 | else { | |
3652 | if (nextchr < 0) | |
3653 | nextchr = UCHARAT(locinput); | |
ffc61ed2 JH |
3654 | if (!nextchr && locinput >= PL_regeol) |
3655 | sayNO; | |
20ed0b26 KW |
3656 | if (!REGINCLASS(rex, scan, (U8*)locinput)) |
3657 | goto anyof_fail; | |
ffc61ed2 | 3658 | nextchr = UCHARAT(++locinput); |
e0f9d4a8 JH |
3659 | break; |
3660 | } | |
262b90c4 | 3661 | anyof_fail: |
e0f9d4a8 JH |
3662 | /* If we might have the case of the German sharp s |
3663 | * in a casefolding Unicode character class. */ | |
3664 | ||
ebc501f0 JH |
3665 | if (ANYOF_FOLD_SHARP_S(scan, locinput, PL_regeol)) { |
3666 | locinput += SHARP_S_SKIP; | |
e0f9d4a8 | 3667 | nextchr = UCHARAT(locinput); |
ffc61ed2 | 3668 | } |
e0f9d4a8 JH |
3669 | else |
3670 | sayNO; | |
b8c5462f | 3671 | break; |
20d0b1e9 | 3672 | /* Special char classes - The defines start on line 129 or so */ |
a12cf05f KW |
3673 | CCC_TRY_AFF_U( ALNUM, ALNUML, perl_word, "a", isALNUM_LC_utf8, isWORDCHAR_L1, isALNUM_LC); |
3674 | CCC_TRY_NEG_U(NALNUM, NALNUML, perl_word, "a", isALNUM_LC_utf8, isWORDCHAR_L1, isALNUM_LC); | |
20d0b1e9 | 3675 | |
a12cf05f KW |
3676 | CCC_TRY_AFF_U( SPACE, SPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE_L1, isSPACE_LC); |
3677 | CCC_TRY_NEG_U(NSPACE, NSPACEL, perl_space, " ", isSPACE_LC_utf8, isSPACE_L1, isSPACE_LC); | |
20d0b1e9 | 3678 | |
d1eb3177 YO |
3679 | CCC_TRY_AFF( DIGIT, DIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC); |
3680 | CCC_TRY_NEG(NDIGIT, NDIGITL, posix_digit, "0", isDIGIT_LC_utf8, isDIGIT, isDIGIT_LC); | |
20d0b1e9 | 3681 | |
37e2e78e KW |
3682 | case CLUMP: /* Match \X: logical Unicode character. This is defined as |
3683 | a Unicode extended Grapheme Cluster */ | |
3684 | /* From http://www.unicode.org/reports/tr29 (5.2 version). An | |
3685 | extended Grapheme Cluster is: | |
3686 | ||
3687 | CR LF | |
3688 | | Prepend* Begin Extend* | |
3689 | | . | |
3690 | ||
3691 | Begin is (Hangul-syllable | ! Control) | |
3692 | Extend is (Grapheme_Extend | Spacing_Mark) | |
3693 | Control is [ GCB_Control CR LF ] | |
3694 | ||
3695 | The discussion below shows how the code for CLUMP is derived | |
3696 | from this regex. Note that most of these concepts are from | |
3697 | property values of the Grapheme Cluster Boundary (GCB) property. | |
3698 | No code point can have multiple property values for a given | |
3699 | property. Thus a code point in Prepend can't be in Control, but | |
3700 | it must be in !Control. This is why Control above includes | |
3701 | GCB_Control plus CR plus LF. The latter two are used in the GCB | |
3702 | property separately, and so can't be in GCB_Control, even though | |
3703 | they logically are controls. Control is not the same as gc=cc, | |
3704 | but includes format and other characters as well. | |
3705 | ||
3706 | The Unicode definition of Hangul-syllable is: | |
3707 | L+ | |
3708 | | (L* ( ( V | LV ) V* | LVT ) T*) | |
3709 | | T+ | |
3710 | ) | |
3711 | Each of these is a value for the GCB property, and hence must be | |
3712 | disjoint, so the order they are tested is immaterial, so the | |
3713 | above can safely be changed to | |
3714 | T+ | |
3715 | | L+ | |
3716 | | (L* ( LVT | ( V | LV ) V*) T*) | |
3717 | ||
3718 | The last two terms can be combined like this: | |
3719 | L* ( L | |
3720 | | (( LVT | ( V | LV ) V*) T*)) | |
3721 | ||
3722 | And refactored into this: | |
3723 | L* (L | LVT T* | V V* T* | LV V* T*) | |
3724 | ||
3725 | That means that if we have seen any L's at all we can quit | |
3726 | there, but if the next character is a LVT, a V or and LV we | |
3727 | should keep going. | |
3728 | ||
3729 | There is a subtlety with Prepend* which showed up in testing. | |
3730 | Note that the Begin, and only the Begin is required in: | |
3731 | | Prepend* Begin Extend* | |
3732 | Also, Begin contains '! Control'. A Prepend must be a '! | |
3733 | Control', which means it must be a Begin. What it comes down to | |
3734 | is that if we match Prepend* and then find no suitable Begin | |
3735 | afterwards, that if we backtrack the last Prepend, that one will | |
3736 | be a suitable Begin. | |
3737 | */ | |
3738 | ||
b7c83a7e | 3739 | if (locinput >= PL_regeol) |
a0ed51b3 | 3740 | sayNO; |
f2ed9b32 | 3741 | if (! utf8_target) { |
37e2e78e KW |
3742 | |
3743 | /* Match either CR LF or '.', as all the other possibilities | |
3744 | * require utf8 */ | |
3745 | locinput++; /* Match the . or CR */ | |
3746 | if (nextchr == '\r' | |
3747 | && locinput < PL_regeol | |
3748 | && UCHARAT(locinput) == '\n') locinput++; | |
3749 | } | |
3750 | else { | |
3751 | ||
3752 | /* Utf8: See if is ( CR LF ); already know that locinput < | |
3753 | * PL_regeol, so locinput+1 is in bounds */ | |
3754 | if (nextchr == '\r' && UCHARAT(locinput + 1) == '\n') { | |
3755 | locinput += 2; | |
3756 | } | |
3757 | else { | |
3758 | /* In case have to backtrack to beginning, then match '.' */ | |
3759 | char *starting = locinput; | |
3760 | ||
3761 | /* In case have to backtrack the last prepend */ | |
3762 | char *previous_prepend = 0; | |
3763 | ||
3764 | LOAD_UTF8_CHARCLASS_GCB(); | |
3765 | ||
3766 | /* Match (prepend)* */ | |
3767 | while (locinput < PL_regeol | |
3768 | && swash_fetch(PL_utf8_X_prepend, | |
f2ed9b32 | 3769 | (U8*)locinput, utf8_target)) |
37e2e78e KW |
3770 | { |
3771 | previous_prepend = locinput; | |
3772 | locinput += UTF8SKIP(locinput); | |
3773 | } | |
3774 | ||
3775 | /* As noted above, if we matched a prepend character, but | |
3776 | * the next thing won't match, back off the last prepend we | |
3777 | * matched, as it is guaranteed to match the begin */ | |
3778 | if (previous_prepend | |
3779 | && (locinput >= PL_regeol | |
3780 | || ! swash_fetch(PL_utf8_X_begin, | |
f2ed9b32 | 3781 | (U8*)locinput, utf8_target))) |
37e2e78e KW |
3782 | { |
3783 | locinput = previous_prepend; | |
3784 | } | |
3785 | ||
3786 | /* Note that here we know PL_regeol > locinput, as we | |
3787 | * tested that upon input to this switch case, and if we | |
3788 | * moved locinput forward, we tested the result just above | |
3789 | * and it either passed, or we backed off so that it will | |
3790 | * now pass */ | |
f2ed9b32 | 3791 | if (! swash_fetch(PL_utf8_X_begin, (U8*)locinput, utf8_target)) { |
37e2e78e KW |
3792 | |
3793 | /* Here did not match the required 'Begin' in the | |
3794 | * second term. So just match the very first | |
3795 | * character, the '.' of the final term of the regex */ | |
3796 | locinput = starting + UTF8SKIP(starting); | |
3797 | } else { | |
3798 | ||
3799 | /* Here is the beginning of a character that can have | |
3800 | * an extender. It is either a hangul syllable, or a | |
3801 | * non-control */ | |
3802 | if (swash_fetch(PL_utf8_X_non_hangul, | |
f2ed9b32 | 3803 | (U8*)locinput, utf8_target)) |
37e2e78e KW |
3804 | { |
3805 | ||
3806 | /* Here not a Hangul syllable, must be a | |
3807 | * ('! * Control') */ | |
3808 | locinput += UTF8SKIP(locinput); | |
3809 | } else { | |
3810 | ||
3811 | /* Here is a Hangul syllable. It can be composed | |
3812 | * of several individual characters. One | |
3813 | * possibility is T+ */ | |
3814 | if (swash_fetch(PL_utf8_X_T, | |
f2ed9b32 | 3815 | (U8*)locinput, utf8_target)) |
37e2e78e KW |
3816 | { |
3817 | while (locinput < PL_regeol | |
3818 | && swash_fetch(PL_utf8_X_T, | |
f2ed9b32 | 3819 | (U8*)locinput, utf8_target)) |
37e2e78e KW |
3820 | { |
3821 | locinput += UTF8SKIP(locinput); | |
3822 | } | |
3823 | } else { | |
3824 | ||
3825 | /* Here, not T+, but is a Hangul. That means | |
3826 | * it is one of the others: L, LV, LVT or V, | |
3827 | * and matches: | |
3828 | * L* (L | LVT T* | V V* T* | LV V* T*) */ | |
3829 | ||
3830 | /* Match L* */ | |
3831 | while (locinput < PL_regeol | |
3832 | && swash_fetch(PL_utf8_X_L, | |
f2ed9b32 | 3833 | (U8*)locinput, utf8_target)) |
37e2e78e KW |
3834 | { |
3835 | locinput += UTF8SKIP(locinput); | |
3836 | } | |
3837 | ||
3838 | /* Here, have exhausted L*. If the next | |
3839 | * character is not an LV, LVT nor V, it means | |
3840 | * we had to have at least one L, so matches L+ | |
3841 | * in the original equation, we have a complete | |
3842 | * hangul syllable. Are done. */ | |
3843 | ||
3844 | if (locinput < PL_regeol | |
3845 | && swash_fetch(PL_utf8_X_LV_LVT_V, | |
f2ed9b32 | 3846 | (U8*)locinput, utf8_target)) |
37e2e78e KW |
3847 | { |
3848 | ||
3849 | /* Otherwise keep going. Must be LV, LVT | |
3850 | * or V. See if LVT */ | |
3851 | if (swash_fetch(PL_utf8_X_LVT, | |
f2ed9b32 | 3852 | (U8*)locinput, utf8_target)) |
37e2e78e KW |
3853 | { |
3854 | locinput += UTF8SKIP(locinput); | |
3855 | } else { | |
3856 | ||
3857 | /* Must be V or LV. Take it, then | |
3858 | * match V* */ | |
3859 | locinput += UTF8SKIP(locinput); | |
3860 | while (locinput < PL_regeol | |
3861 | && swash_fetch(PL_utf8_X_V, | |
f2ed9b32 | 3862 | (U8*)locinput, utf8_target)) |
37e2e78e KW |
3863 | { |
3864 | locinput += UTF8SKIP(locinput); | |
3865 | } | |
3866 | } | |
3867 | ||
3868 | /* And any of LV, LVT, or V can be followed | |
3869 | * by T* */ | |
3870 | while (locinput < PL_regeol | |
3871 | && swash_fetch(PL_utf8_X_T, | |
3872 | (U8*)locinput, | |
f2ed9b32 | 3873 | utf8_target)) |
37e2e78e KW |
3874 | { |
3875 | locinput += UTF8SKIP(locinput); | |
3876 | } | |
3877 | } | |
3878 | } | |
3879 | } | |
3880 | ||
3881 | /* Match any extender */ | |
3882 | while (locinput < PL_regeol | |
3883 | && swash_fetch(PL_utf8_X_extend, | |
f2ed9b32 | 3884 | (U8*)locinput, utf8_target)) |
37e2e78e KW |
3885 | { |
3886 | locinput += UTF8SKIP(locinput); | |
3887 | } | |
3888 | } | |
3889 | } | |
3890 | if (locinput > PL_regeol) sayNO; | |
3891 | } | |
a0ed51b3 LW |
3892 | nextchr = UCHARAT(locinput); |
3893 | break; | |
81714fb9 YO |
3894 | |
3895 | case NREFFL: | |
3896 | { | |
3897 | char *s; | |
ff1157ca | 3898 | char type; |
81714fb9 YO |
3899 | PL_reg_flags |= RF_tainted; |
3900 | /* FALL THROUGH */ | |
3901 | case NREF: | |
3902 | case NREFF: | |
ff1157ca | 3903 | type = OP(scan); |
0a4db386 YO |
3904 | n = reg_check_named_buff_matched(rex,scan); |
3905 | ||
3906 | if ( n ) { | |
3907 | type = REF + ( type - NREF ); | |
3908 | goto do_ref; | |
3909 | } else { | |
81714fb9 | 3910 | sayNO; |
0a4db386 YO |
3911 | } |
3912 | /* unreached */ | |
c8756f30 | 3913 | case REFFL: |
3280af22 | 3914 | PL_reg_flags |= RF_tainted; |
c8756f30 | 3915 | /* FALL THROUGH */ |
c277df42 | 3916 | case REF: |
81714fb9 | 3917 | case REFF: |
c277df42 | 3918 | n = ARG(scan); /* which paren pair */ |
81714fb9 YO |
3919 | type = OP(scan); |
3920 | do_ref: | |
f0ab9afb | 3921 | ln = PL_regoffs[n].start; |
2c2d71f5 | 3922 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
3b6647e0 | 3923 | if (*PL_reglastparen < n || ln == -1) |
af3f8c16 | 3924 | sayNO; /* Do not match unless seen CLOSEn. */ |
f0ab9afb | 3925 | if (ln == PL_regoffs[n].end) |
a0d0e21e | 3926 | break; |
a0ed51b3 | 3927 | |
24d3c4a9 | 3928 | s = PL_bostr + ln; |
f2ed9b32 | 3929 | if (utf8_target && type != REF) { /* REF can do byte comparison */ |
a0ed51b3 | 3930 | char *l = locinput; |
f0ab9afb | 3931 | const char *e = PL_bostr + PL_regoffs[n].end; |
a0ed51b3 LW |
3932 | /* |
3933 | * Note that we can't do the "other character" lookup trick as | |
3934 | * in the 8-bit case (no pun intended) because in Unicode we | |
3935 | * have to map both upper and title case to lower case. | |
3936 | */ | |
81714fb9 | 3937 | if (type == REFF) { |
a0ed51b3 | 3938 | while (s < e) { |
a3b680e6 AL |
3939 | STRLEN ulen1, ulen2; |
3940 | U8 tmpbuf1[UTF8_MAXBYTES_CASE+1]; | |
3941 | U8 tmpbuf2[UTF8_MAXBYTES_CASE+1]; | |
3942 | ||
a0ed51b3 LW |
3943 | if (l >= PL_regeol) |
3944 | sayNO; | |
a2a2844f JH |
3945 | toLOWER_utf8((U8*)s, tmpbuf1, &ulen1); |
3946 | toLOWER_utf8((U8*)l, tmpbuf2, &ulen2); | |
7114a2d2 | 3947 | if (ulen1 != ulen2 || memNE((char *)tmpbuf1, (char *)tmpbuf2, ulen1)) |
a0ed51b3 | 3948 | sayNO; |
a2a2844f JH |
3949 | s += ulen1; |
3950 | l += ulen2; | |
a0ed51b3 LW |
3951 | } |
3952 | } | |
3953 | locinput = l; | |
3954 | nextchr = UCHARAT(locinput); | |
3955 | break; | |
3956 | } | |
3957 | ||
a0d0e21e | 3958 | /* Inline the first character, for speed. */ |
76e3520e | 3959 | if (UCHARAT(s) != nextchr && |
81714fb9 YO |
3960 | (type == REF || |
3961 | (UCHARAT(s) != (type == REFF | |
3962 | ? PL_fold : PL_fold_locale)[nextchr]))) | |
4633a7c4 | 3963 | sayNO; |
f0ab9afb | 3964 | ln = PL_regoffs[n].end - ln; |
24d3c4a9 | 3965 | if (locinput + ln > PL_regeol) |
4633a7c4 | 3966 | sayNO; |
81714fb9 | 3967 | if (ln > 1 && (type == REF |
24d3c4a9 | 3968 | ? memNE(s, locinput, ln) |
81714fb9 | 3969 | : (type == REFF |
4c1b470c KW |
3970 | ? ! foldEQ(s, locinput, ln) |
3971 | : ! foldEQ_locale(s, locinput, ln)))) | |
4633a7c4 | 3972 | sayNO; |
24d3c4a9 | 3973 | locinput += ln; |
76e3520e | 3974 | nextchr = UCHARAT(locinput); |
a0d0e21e | 3975 | break; |
81714fb9 | 3976 | } |
a0d0e21e | 3977 | case NOTHING: |
c277df42 | 3978 | case TAIL: |
a0d0e21e LW |
3979 | break; |
3980 | case BACK: | |
3981 | break; | |
40a82448 DM |
3982 | |
3983 | #undef ST | |
3984 | #define ST st->u.eval | |
c277df42 | 3985 | { |
c277df42 | 3986 | SV *ret; |
d2f13c59 | 3987 | REGEXP *re_sv; |
6bda09f9 | 3988 | regexp *re; |
f8fc2ecf | 3989 | regexp_internal *rei; |
1a147d38 YO |
3990 | regnode *startpoint; |
3991 | ||
3992 | case GOSTART: | |
e7707071 YO |
3993 | case GOSUB: /* /(...(?1))/ /(...(?&foo))/ */ |
3994 | if (cur_eval && cur_eval->locinput==locinput) { | |
24b23f37 | 3995 | if (cur_eval->u.eval.close_paren == (U32)ARG(scan)) |
1a147d38 | 3996 | Perl_croak(aTHX_ "Infinite recursion in regex"); |
4b196cd4 | 3997 | if ( ++nochange_depth > max_nochange_depth ) |
1a147d38 YO |
3998 | Perl_croak(aTHX_ |
3999 | "Pattern subroutine nesting without pos change" | |
4000 | " exceeded limit in regex"); | |
6bda09f9 YO |
4001 | } else { |
4002 | nochange_depth = 0; | |
1a147d38 | 4003 | } |
288b8c02 | 4004 | re_sv = rex_sv; |
6bda09f9 | 4005 | re = rex; |
f8fc2ecf | 4006 | rei = rexi; |
288b8c02 | 4007 | (void)ReREFCNT_inc(rex_sv); |
1a147d38 | 4008 | if (OP(scan)==GOSUB) { |
6bda09f9 YO |
4009 | startpoint = scan + ARG2L(scan); |
4010 | ST.close_paren = ARG(scan); | |
4011 | } else { | |
f8fc2ecf | 4012 | startpoint = rei->program+1; |
6bda09f9 YO |
4013 | ST.close_paren = 0; |
4014 | } | |
4015 | goto eval_recurse_doit; | |
4016 | /* NOTREACHED */ | |
4017 | case EVAL: /* /(?{A})B/ /(??{A})B/ and /(?(?{A})X|Y)B/ */ | |
4018 | if (cur_eval && cur_eval->locinput==locinput) { | |
4b196cd4 | 4019 | if ( ++nochange_depth > max_nochange_depth ) |
1a147d38 | 4020 | Perl_croak(aTHX_ "EVAL without pos change exceeded limit in regex"); |
6bda09f9 YO |
4021 | } else { |
4022 | nochange_depth = 0; | |
4023 | } | |
8e5e9ebe | 4024 | { |
4aabdb9b DM |
4025 | /* execute the code in the {...} */ |
4026 | dSP; | |
6136c704 | 4027 | SV ** const before = SP; |
4aabdb9b DM |
4028 | OP_4tree * const oop = PL_op; |
4029 | COP * const ocurcop = PL_curcop; | |
4030 | PAD *old_comppad; | |
d80618d2 | 4031 | char *saved_regeol = PL_regeol; |
91332126 FR |
4032 | struct re_save_state saved_state; |
4033 | ||
6562f1c4 | 4034 | /* To not corrupt the existing regex state while executing the |
b7f4cd04 FR |
4035 | * eval we would normally put it on the save stack, like with |
4036 | * save_re_context. However, re-evals have a weird scoping so we | |
4037 | * can't just add ENTER/LEAVE here. With that, things like | |
4038 | * | |
4039 | * (?{$a=2})(a(?{local$a=$a+1}))*aak*c(?{$b=$a}) | |
4040 | * | |
4041 | * would break, as they expect the localisation to be unwound | |
4042 | * only when the re-engine backtracks through the bit that | |
4043 | * localised it. | |
4044 | * | |
4045 | * What we do instead is just saving the state in a local c | |
4046 | * variable. | |
4047 | */ | |
91332126 FR |
4048 | Copy(&PL_reg_state, &saved_state, 1, struct re_save_state); |
4049 | ||
4aabdb9b | 4050 | n = ARG(scan); |
f8fc2ecf | 4051 | PL_op = (OP_4tree*)rexi->data->data[n]; |
24b23f37 YO |
4052 | DEBUG_STATE_r( PerlIO_printf(Perl_debug_log, |
4053 | " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) ); | |
f8fc2ecf | 4054 | PAD_SAVE_LOCAL(old_comppad, (PAD*)rexi->data->data[n + 2]); |
f0ab9afb | 4055 | PL_regoffs[0].end = PL_reg_magic->mg_len = locinput - PL_bostr; |
4aabdb9b | 4056 | |
2bf803e2 YO |
4057 | if (sv_yes_mark) { |
4058 | SV *sv_mrk = get_sv("REGMARK", 1); | |
4059 | sv_setsv(sv_mrk, sv_yes_mark); | |
4060 | } | |
4061 | ||
8e5e9ebe RGS |
4062 | CALLRUNOPS(aTHX); /* Scalar context. */ |
4063 | SPAGAIN; | |
4064 | if (SP == before) | |
075aa684 | 4065 | ret = &PL_sv_undef; /* protect against empty (?{}) blocks. */ |
8e5e9ebe RGS |
4066 | else { |
4067 | ret = POPs; | |
4068 | PUTBACK; | |
4069 | } | |
4aabdb9b | 4070 | |
91332126 FR |
4071 | Copy(&saved_state, &PL_reg_state, 1, struct re_save_state); |
4072 | ||
4aabdb9b DM |
4073 | PL_op = oop; |
4074 | PAD_RESTORE_LOCAL(old_comppad); | |
4075 | PL_curcop = ocurcop; | |
d80618d2 | 4076 | PL_regeol = saved_regeol; |
24d3c4a9 | 4077 | if (!logical) { |
4aabdb9b DM |
4078 | /* /(?{...})/ */ |
4079 | sv_setsv(save_scalar(PL_replgv), ret); | |
4aabdb9b DM |
4080 | break; |
4081 | } | |
8e5e9ebe | 4082 | } |
24d3c4a9 DM |
4083 | if (logical == 2) { /* Postponed subexpression: /(??{...})/ */ |
4084 | logical = 0; | |
4aabdb9b | 4085 | { |
4f639d21 DM |
4086 | /* extract RE object from returned value; compiling if |
4087 | * necessary */ | |
6136c704 | 4088 | MAGIC *mg = NULL; |
288b8c02 | 4089 | REGEXP *rx = NULL; |
5c35adbb NC |
4090 | |
4091 | if (SvROK(ret)) { | |
288b8c02 | 4092 | SV *const sv = SvRV(ret); |
5c35adbb NC |
4093 | |
4094 | if (SvTYPE(sv) == SVt_REGEXP) { | |
d2f13c59 | 4095 | rx = (REGEXP*) sv; |
5c35adbb NC |
4096 | } else if (SvSMAGICAL(sv)) { |
4097 | mg = mg_find(sv, PERL_MAGIC_qr); | |
4098 | assert(mg); | |
4099 | } | |
4100 | } else if (SvTYPE(ret) == SVt_REGEXP) { | |
d2f13c59 | 4101 | rx = (REGEXP*) ret; |
5c35adbb | 4102 | } else if (SvSMAGICAL(ret)) { |
124ee91a NC |
4103 | if (SvGMAGICAL(ret)) { |
4104 | /* I don't believe that there is ever qr magic | |
4105 | here. */ | |
4106 | assert(!mg_find(ret, PERL_MAGIC_qr)); | |
faf82a0b | 4107 | sv_unmagic(ret, PERL_MAGIC_qr); |
124ee91a NC |
4108 | } |
4109 | else { | |
faf82a0b | 4110 | mg = mg_find(ret, PERL_MAGIC_qr); |
124ee91a NC |
4111 | /* testing suggests mg only ends up non-NULL for |
4112 | scalars who were upgraded and compiled in the | |
4113 | else block below. In turn, this is only | |
4114 | triggered in the "postponed utf8 string" tests | |
4115 | in t/op/pat.t */ | |
4116 | } | |
0f5d15d6 | 4117 | } |
faf82a0b | 4118 | |
0f5d15d6 | 4119 | if (mg) { |
d2f13c59 | 4120 | rx = (REGEXP *) mg->mg_obj; /*XXX:dmq*/ |
e2560c33 | 4121 | assert(rx); |
0f5d15d6 | 4122 | } |
288b8c02 | 4123 | if (rx) { |
f0826785 | 4124 | rx = reg_temp_copy(NULL, rx); |
288b8c02 | 4125 | } |
0f5d15d6 | 4126 | else { |
c737faaf | 4127 | U32 pm_flags = 0; |
a3b680e6 | 4128 | const I32 osize = PL_regsize; |
0f5d15d6 | 4129 | |
b9ad30b4 NC |
4130 | if (DO_UTF8(ret)) { |
4131 | assert (SvUTF8(ret)); | |
4132 | } else if (SvUTF8(ret)) { | |
4133 | /* Not doing UTF-8, despite what the SV says. Is | |
4134 | this only if we're trapped in use 'bytes'? */ | |
4135 | /* Make a copy of the octet sequence, but without | |
4136 | the flag on, as the compiler now honours the | |
4137 | SvUTF8 flag on ret. */ | |
4138 | STRLEN len; | |
4139 | const char *const p = SvPV(ret, len); | |
4140 | ret = newSVpvn_flags(p, len, SVs_TEMP); | |
4141 | } | |
288b8c02 | 4142 | rx = CALLREGCOMP(ret, pm_flags); |
9041c2e3 | 4143 | if (!(SvFLAGS(ret) |
faf82a0b | 4144 | & (SVs_TEMP | SVs_PADTMP | SVf_READONLY |
3ce3ed55 | 4145 | | SVs_GMG))) { |
a2794585 NC |
4146 | /* This isn't a first class regexp. Instead, it's |
4147 | caching a regexp onto an existing, Perl visible | |
4148 | scalar. */ | |
ad64d0ec | 4149 | sv_magic(ret, MUTABLE_SV(rx), PERL_MAGIC_qr, 0, 0); |
3ce3ed55 | 4150 | } |
0f5d15d6 | 4151 | PL_regsize = osize; |
0f5d15d6 | 4152 | } |
288b8c02 NC |
4153 | re_sv = rx; |
4154 | re = (struct regexp *)SvANY(rx); | |
4aabdb9b | 4155 | } |
07bc277f | 4156 | RXp_MATCH_COPIED_off(re); |
28d8d7f4 YO |
4157 | re->subbeg = rex->subbeg; |
4158 | re->sublen = rex->sublen; | |
f8fc2ecf | 4159 | rei = RXi_GET(re); |
6bda09f9 | 4160 | DEBUG_EXECUTE_r( |
f2ed9b32 | 4161 | debug_start_match(re_sv, utf8_target, locinput, PL_regeol, |
6bda09f9 YO |
4162 | "Matching embedded"); |
4163 | ); | |
f8fc2ecf | 4164 | startpoint = rei->program + 1; |
1a147d38 | 4165 | ST.close_paren = 0; /* only used for GOSUB */ |
6bda09f9 YO |
4166 | /* borrowed from regtry */ |
4167 | if (PL_reg_start_tmpl <= re->nparens) { | |
4168 | PL_reg_start_tmpl = re->nparens*3/2 + 3; | |
4169 | if(PL_reg_start_tmp) | |
4170 | Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*); | |
4171 | else | |
4172 | Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*); | |
dd5def09 | 4173 | } |
aa283a38 | 4174 | |
1a147d38 | 4175 | eval_recurse_doit: /* Share code with GOSUB below this line */ |
aa283a38 | 4176 | /* run the pattern returned from (??{...}) */ |
40a82448 DM |
4177 | ST.cp = regcppush(0); /* Save *all* the positions. */ |
4178 | REGCP_SET(ST.lastcp); | |
6bda09f9 | 4179 | |
f0ab9afb | 4180 | PL_regoffs = re->offs; /* essentially NOOP on GOSUB */ |
6bda09f9 | 4181 | |
0357f1fd ML |
4182 | /* see regtry, specifically PL_reglast(?:close)?paren is a pointer! (i dont know why) :dmq */ |
4183 | PL_reglastparen = &re->lastparen; | |
4184 | PL_reglastcloseparen = &re->lastcloseparen; | |
4185 | re->lastparen = 0; | |
4186 | re->lastcloseparen = 0; | |
4187 | ||
4aabdb9b | 4188 | PL_reginput = locinput; |
ae0beba1 | 4189 | PL_regsize = 0; |
4aabdb9b DM |
4190 | |
4191 | /* XXXX This is too dramatic a measure... */ | |
4192 | PL_reg_maxiter = 0; | |
4193 | ||
faec1544 | 4194 | ST.toggle_reg_flags = PL_reg_flags; |
3c8556c3 | 4195 | if (RX_UTF8(re_sv)) |
faec1544 DM |
4196 | PL_reg_flags |= RF_utf8; |
4197 | else | |
4198 | PL_reg_flags &= ~RF_utf8; | |
4199 | ST.toggle_reg_flags ^= PL_reg_flags; /* diff of old and new */ | |
4200 | ||
288b8c02 | 4201 | ST.prev_rex = rex_sv; |
faec1544 | 4202 | ST.prev_curlyx = cur_curlyx; |
288b8c02 NC |
4203 | SETREX(rex_sv,re_sv); |
4204 | rex = re; | |
f8fc2ecf | 4205 | rexi = rei; |
faec1544 | 4206 | cur_curlyx = NULL; |
40a82448 | 4207 | ST.B = next; |
faec1544 DM |
4208 | ST.prev_eval = cur_eval; |
4209 | cur_eval = st; | |
faec1544 | 4210 | /* now continue from first node in postoned RE */ |
6bda09f9 | 4211 | PUSH_YES_STATE_GOTO(EVAL_AB, startpoint); |
4aabdb9b | 4212 | /* NOTREACHED */ |
a0ed51b3 | 4213 | } |
24d3c4a9 | 4214 | /* logical is 1, /(?(?{...})X|Y)/ */ |
f2338a2e | 4215 | sw = cBOOL(SvTRUE(ret)); |
24d3c4a9 | 4216 | logical = 0; |
c277df42 IZ |
4217 | break; |
4218 | } | |
40a82448 | 4219 | |
faec1544 DM |
4220 | case EVAL_AB: /* cleanup after a successful (??{A})B */ |
4221 | /* note: this is called twice; first after popping B, then A */ | |
4222 | PL_reg_flags ^= ST.toggle_reg_flags; | |
288b8c02 NC |
4223 | ReREFCNT_dec(rex_sv); |
4224 | SETREX(rex_sv,ST.prev_rex); | |
4225 | rex = (struct regexp *)SvANY(rex_sv); | |
f8fc2ecf | 4226 | rexi = RXi_GET(rex); |
faec1544 DM |
4227 | regcpblow(ST.cp); |
4228 | cur_eval = ST.prev_eval; | |
4229 | cur_curlyx = ST.prev_curlyx; | |
34a81e2b B |
4230 | |
4231 | /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */ | |
0357f1fd ML |
4232 | PL_reglastparen = &rex->lastparen; |
4233 | PL_reglastcloseparen = &rex->lastcloseparen; | |
34a81e2b B |
4234 | /* also update PL_regoffs */ |
4235 | PL_regoffs = rex->offs; | |
0357f1fd | 4236 | |
40a82448 DM |
4237 | /* XXXX This is too dramatic a measure... */ |
4238 | PL_reg_maxiter = 0; | |
e7707071 | 4239 | if ( nochange_depth ) |
4b196cd4 | 4240 | nochange_depth--; |
262b90c4 | 4241 | sayYES; |
40a82448 | 4242 | |
40a82448 | 4243 | |
faec1544 DM |
4244 | case EVAL_AB_fail: /* unsuccessfully ran A or B in (??{A})B */ |
4245 | /* note: this is called twice; first after popping B, then A */ | |
4246 | PL_reg_flags ^= ST.toggle_reg_flags; | |
288b8c02 NC |
4247 | ReREFCNT_dec(rex_sv); |
4248 | SETREX(rex_sv,ST.prev_rex); | |
4249 | rex = (struct regexp *)SvANY(rex_sv); | |
f8fc2ecf | 4250 | rexi = RXi_GET(rex); |
34a81e2b | 4251 | /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */ |
0357f1fd ML |
4252 | PL_reglastparen = &rex->lastparen; |
4253 | PL_reglastcloseparen = &rex->lastcloseparen; | |
4254 | ||
40a82448 DM |
4255 | PL_reginput = locinput; |
4256 | REGCP_UNWIND(ST.lastcp); | |
4257 | regcppop(rex); | |
faec1544 DM |
4258 | cur_eval = ST.prev_eval; |
4259 | cur_curlyx = ST.prev_curlyx; | |
4260 | /* XXXX This is too dramatic a measure... */ | |
4261 | PL_reg_maxiter = 0; | |
e7707071 | 4262 | if ( nochange_depth ) |
4b196cd4 | 4263 | nochange_depth--; |
40a82448 | 4264 | sayNO_SILENT; |
40a82448 DM |
4265 | #undef ST |
4266 | ||
a0d0e21e | 4267 | case OPEN: |
c277df42 | 4268 | n = ARG(scan); /* which paren pair */ |
3280af22 NIS |
4269 | PL_reg_start_tmp[n] = locinput; |
4270 | if (n > PL_regsize) | |
4271 | PL_regsize = n; | |
e2e6a0f1 | 4272 | lastopen = n; |
a0d0e21e LW |
4273 | break; |
4274 | case CLOSE: | |
c277df42 | 4275 | n = ARG(scan); /* which paren pair */ |
f0ab9afb NC |
4276 | PL_regoffs[n].start = PL_reg_start_tmp[n] - PL_bostr; |
4277 | PL_regoffs[n].end = locinput - PL_bostr; | |
7f69552c YO |
4278 | /*if (n > PL_regsize) |
4279 | PL_regsize = n;*/ | |
3b6647e0 | 4280 | if (n > *PL_reglastparen) |
3280af22 | 4281 | *PL_reglastparen = n; |
a01268b5 | 4282 | *PL_reglastcloseparen = n; |
3b6647e0 | 4283 | if (cur_eval && cur_eval->u.eval.close_paren == n) { |
6bda09f9 YO |
4284 | goto fake_end; |
4285 | } | |
a0d0e21e | 4286 | break; |
e2e6a0f1 YO |
4287 | case ACCEPT: |
4288 | if (ARG(scan)){ | |
4289 | regnode *cursor; | |
4290 | for (cursor=scan; | |
4291 | cursor && OP(cursor)!=END; | |
4292 | cursor=regnext(cursor)) | |
4293 | { | |
4294 | if ( OP(cursor)==CLOSE ){ | |
4295 | n = ARG(cursor); | |
4296 | if ( n <= lastopen ) { | |
f0ab9afb NC |
4297 | PL_regoffs[n].start |
4298 | = PL_reg_start_tmp[n] - PL_bostr; | |
4299 | PL_regoffs[n].end = locinput - PL_bostr; | |
e2e6a0f1 YO |
4300 | /*if (n > PL_regsize) |
4301 | PL_regsize = n;*/ | |
3b6647e0 | 4302 | if (n > *PL_reglastparen) |
e2e6a0f1 YO |
4303 | *PL_reglastparen = n; |
4304 | *PL_reglastcloseparen = n; | |
3b6647e0 RB |
4305 | if ( n == ARG(scan) || (cur_eval && |
4306 | cur_eval->u.eval.close_paren == n)) | |
e2e6a0f1 YO |
4307 | break; |
4308 | } | |
4309 | } | |
4310 | } | |
4311 | } | |
4312 | goto fake_end; | |
4313 | /*NOTREACHED*/ | |
c277df42 IZ |
4314 | case GROUPP: |
4315 | n = ARG(scan); /* which paren pair */ | |
f2338a2e | 4316 | sw = cBOOL(*PL_reglastparen >= n && PL_regoffs[n].end != -1); |
c277df42 | 4317 | break; |
0a4db386 YO |
4318 | case NGROUPP: |
4319 | /* reg_check_named_buff_matched returns 0 for no match */ | |
f2338a2e | 4320 | sw = cBOOL(0 < reg_check_named_buff_matched(rex,scan)); |
0a4db386 | 4321 | break; |
1a147d38 | 4322 | case INSUBP: |
0a4db386 | 4323 | n = ARG(scan); |
3b6647e0 | 4324 | sw = (cur_eval && (!n || cur_eval->u.eval.close_paren == n)); |
0a4db386 YO |
4325 | break; |
4326 | case DEFINEP: | |
4327 | sw = 0; | |
4328 | break; | |
c277df42 | 4329 | case IFTHEN: |
2c2d71f5 | 4330 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
24d3c4a9 | 4331 | if (sw) |
c277df42 IZ |
4332 | next = NEXTOPER(NEXTOPER(scan)); |
4333 | else { | |
4334 | next = scan + ARG(scan); | |
4335 | if (OP(next) == IFTHEN) /* Fake one. */ | |
4336 | next = NEXTOPER(NEXTOPER(next)); | |
4337 | } | |
4338 | break; | |
4339 | case LOGICAL: | |
24d3c4a9 | 4340 | logical = scan->flags; |
c277df42 | 4341 | break; |
c476f425 | 4342 | |
2ab05381 | 4343 | /******************************************************************* |
2ab05381 | 4344 | |
c476f425 DM |
4345 | The CURLYX/WHILEM pair of ops handle the most generic case of the /A*B/ |
4346 | pattern, where A and B are subpatterns. (For simple A, CURLYM or | |
4347 | STAR/PLUS/CURLY/CURLYN are used instead.) | |
2ab05381 | 4348 | |
c476f425 | 4349 | A*B is compiled as <CURLYX><A><WHILEM><B> |
2ab05381 | 4350 | |
c476f425 DM |
4351 | On entry to the subpattern, CURLYX is called. This pushes a CURLYX |
4352 | state, which contains the current count, initialised to -1. It also sets | |
4353 | cur_curlyx to point to this state, with any previous value saved in the | |
4354 | state block. | |
2ab05381 | 4355 | |
c476f425 DM |
4356 | CURLYX then jumps straight to the WHILEM op, rather than executing A, |
4357 | since the pattern may possibly match zero times (i.e. it's a while {} loop | |
4358 | rather than a do {} while loop). | |
2ab05381 | 4359 | |
c476f425 DM |
4360 | Each entry to WHILEM represents a successful match of A. The count in the |
4361 | CURLYX block is incremented, another WHILEM state is pushed, and execution | |
4362 | passes to A or B depending on greediness and the current count. | |
2ab05381 | 4363 | |
c476f425 DM |
4364 | For example, if matching against the string a1a2a3b (where the aN are |
4365 | substrings that match /A/), then the match progresses as follows: (the | |
4366 | pushed states are interspersed with the bits of strings matched so far): | |
2ab05381 | 4367 | |
c476f425 DM |
4368 | <CURLYX cnt=-1> |
4369 | <CURLYX cnt=0><WHILEM> | |
4370 | <CURLYX cnt=1><WHILEM> a1 <WHILEM> | |
4371 | <CURLYX cnt=2><WHILEM> a1 <WHILEM> a2 <WHILEM> | |
4372 | <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> | |
4373 | <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> b | |
2ab05381 | 4374 | |
c476f425 DM |
4375 | (Contrast this with something like CURLYM, which maintains only a single |
4376 | backtrack state: | |
2ab05381 | 4377 | |
c476f425 DM |
4378 | <CURLYM cnt=0> a1 |
4379 | a1 <CURLYM cnt=1> a2 | |
4380 | a1 a2 <CURLYM cnt=2> a3 | |
4381 | a1 a2 a3 <CURLYM cnt=3> b | |
4382 | ) | |
2ab05381 | 4383 | |
c476f425 DM |
4384 | Each WHILEM state block marks a point to backtrack to upon partial failure |
4385 | of A or B, and also contains some minor state data related to that | |
4386 | iteration. The CURLYX block, pointed to by cur_curlyx, contains the | |
4387 | overall state, such as the count, and pointers to the A and B ops. | |
2ab05381 | 4388 | |
c476f425 DM |
4389 | This is complicated slightly by nested CURLYX/WHILEM's. Since cur_curlyx |
4390 | must always point to the *current* CURLYX block, the rules are: | |
2ab05381 | 4391 | |
c476f425 DM |
4392 | When executing CURLYX, save the old cur_curlyx in the CURLYX state block, |
4393 | and set cur_curlyx to point the new block. | |
2ab05381 | 4394 | |
c476f425 DM |
4395 | When popping the CURLYX block after a successful or unsuccessful match, |
4396 | restore the previous cur_curlyx. | |
2ab05381 | 4397 | |
c476f425 DM |
4398 | When WHILEM is about to execute B, save the current cur_curlyx, and set it |
4399 | to the outer one saved in the CURLYX block. | |
2ab05381 | 4400 | |
c476f425 DM |
4401 | When popping the WHILEM block after a successful or unsuccessful B match, |
4402 | restore the previous cur_curlyx. | |
2ab05381 | 4403 | |
c476f425 DM |
4404 | Here's an example for the pattern (AI* BI)*BO |
4405 | I and O refer to inner and outer, C and W refer to CURLYX and WHILEM: | |
2ab05381 | 4406 | |
c476f425 DM |
4407 | cur_ |
4408 | curlyx backtrack stack | |
4409 | ------ --------------- | |
4410 | NULL | |
4411 | CO <CO prev=NULL> <WO> | |
4412 | CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai | |
4413 | CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi | |
4414 | NULL <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi <WO prev=CO> bo | |
2ab05381 | 4415 | |
c476f425 DM |
4416 | At this point the pattern succeeds, and we work back down the stack to |
4417 | clean up, restoring as we go: | |
95b24440 | 4418 | |
c476f425 DM |
4419 | CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi |
4420 | CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai | |
4421 | CO <CO prev=NULL> <WO> | |
4422 | NULL | |
a0374537 | 4423 | |
c476f425 DM |
4424 | *******************************************************************/ |
4425 | ||
4426 | #define ST st->u.curlyx | |
4427 | ||
4428 | case CURLYX: /* start of /A*B/ (for complex A) */ | |
4429 | { | |
4430 | /* No need to save/restore up to this paren */ | |
4431 | I32 parenfloor = scan->flags; | |
4432 | ||
4433 | assert(next); /* keep Coverity happy */ | |
4434 | if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */ | |
4435 | next += ARG(next); | |
4436 | ||
4437 | /* XXXX Probably it is better to teach regpush to support | |
4438 | parenfloor > PL_regsize... */ | |
4439 | if (parenfloor > (I32)*PL_reglastparen) | |
4440 | parenfloor = *PL_reglastparen; /* Pessimization... */ | |
4441 | ||
4442 | ST.prev_curlyx= cur_curlyx; | |
4443 | cur_curlyx = st; | |
4444 | ST.cp = PL_savestack_ix; | |
4445 | ||
4446 | /* these fields contain the state of the current curly. | |
4447 | * they are accessed by subsequent WHILEMs */ | |
4448 | ST.parenfloor = parenfloor; | |
d02d6d97 | 4449 | ST.me = scan; |
c476f425 | 4450 | ST.B = next; |
24d3c4a9 DM |
4451 | ST.minmod = minmod; |
4452 | minmod = 0; | |
c476f425 DM |
4453 | ST.count = -1; /* this will be updated by WHILEM */ |
4454 | ST.lastloc = NULL; /* this will be updated by WHILEM */ | |
4455 | ||
4456 | PL_reginput = locinput; | |
4457 | PUSH_YES_STATE_GOTO(CURLYX_end, PREVOPER(next)); | |
5f66b61c | 4458 | /* NOTREACHED */ |
c476f425 | 4459 | } |
a0d0e21e | 4460 | |
c476f425 | 4461 | case CURLYX_end: /* just finished matching all of A*B */ |
c476f425 DM |
4462 | cur_curlyx = ST.prev_curlyx; |
4463 | sayYES; | |
4464 | /* NOTREACHED */ | |
a0d0e21e | 4465 | |
c476f425 DM |
4466 | case CURLYX_end_fail: /* just failed to match all of A*B */ |
4467 | regcpblow(ST.cp); | |
4468 | cur_curlyx = ST.prev_curlyx; | |
4469 | sayNO; | |
4470 | /* NOTREACHED */ | |
4633a7c4 | 4471 | |
a0d0e21e | 4472 | |
c476f425 DM |
4473 | #undef ST |
4474 | #define ST st->u.whilem | |
4475 | ||
4476 | case WHILEM: /* just matched an A in /A*B/ (for complex A) */ | |
4477 | { | |
4478 | /* see the discussion above about CURLYX/WHILEM */ | |
c476f425 | 4479 | I32 n; |
d02d6d97 DM |
4480 | int min = ARG1(cur_curlyx->u.curlyx.me); |
4481 | int max = ARG2(cur_curlyx->u.curlyx.me); | |
4482 | regnode *A = NEXTOPER(cur_curlyx->u.curlyx.me) + EXTRA_STEP_2ARGS; | |
4483 | ||
c476f425 DM |
4484 | assert(cur_curlyx); /* keep Coverity happy */ |
4485 | n = ++cur_curlyx->u.curlyx.count; /* how many A's matched */ | |
4486 | ST.save_lastloc = cur_curlyx->u.curlyx.lastloc; | |
4487 | ST.cache_offset = 0; | |
4488 | ST.cache_mask = 0; | |
4489 | ||
4490 | PL_reginput = locinput; | |
4491 | ||
4492 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, | |
d02d6d97 DM |
4493 | "%*s whilem: matched %ld out of %d..%d\n", |
4494 | REPORT_CODE_OFF+depth*2, "", (long)n, min, max) | |
c476f425 | 4495 | ); |
a0d0e21e | 4496 | |
c476f425 | 4497 | /* First just match a string of min A's. */ |
a0d0e21e | 4498 | |
d02d6d97 | 4499 | if (n < min) { |
c476f425 | 4500 | cur_curlyx->u.curlyx.lastloc = locinput; |
d02d6d97 | 4501 | PUSH_STATE_GOTO(WHILEM_A_pre, A); |
c476f425 DM |
4502 | /* NOTREACHED */ |
4503 | } | |
4504 | ||
4505 | /* If degenerate A matches "", assume A done. */ | |
4506 | ||
4507 | if (locinput == cur_curlyx->u.curlyx.lastloc) { | |
4508 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, | |
4509 | "%*s whilem: empty match detected, trying continuation...\n", | |
4510 | REPORT_CODE_OFF+depth*2, "") | |
4511 | ); | |
4512 | goto do_whilem_B_max; | |
4513 | } | |
4514 | ||
4515 | /* super-linear cache processing */ | |
4516 | ||
4517 | if (scan->flags) { | |
a0d0e21e | 4518 | |
2c2d71f5 | 4519 | if (!PL_reg_maxiter) { |
c476f425 DM |
4520 | /* start the countdown: Postpone detection until we |
4521 | * know the match is not *that* much linear. */ | |
2c2d71f5 | 4522 | PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4); |
66bf836d DM |
4523 | /* possible overflow for long strings and many CURLYX's */ |
4524 | if (PL_reg_maxiter < 0) | |
4525 | PL_reg_maxiter = I32_MAX; | |
2c2d71f5 JH |
4526 | PL_reg_leftiter = PL_reg_maxiter; |
4527 | } | |
c476f425 | 4528 | |
2c2d71f5 | 4529 | if (PL_reg_leftiter-- == 0) { |
c476f425 | 4530 | /* initialise cache */ |
3298f257 | 4531 | const I32 size = (PL_reg_maxiter + 7)/8; |
2c2d71f5 | 4532 | if (PL_reg_poscache) { |
eb160463 | 4533 | if ((I32)PL_reg_poscache_size < size) { |
2c2d71f5 JH |
4534 | Renew(PL_reg_poscache, size, char); |
4535 | PL_reg_poscache_size = size; | |
4536 | } | |
4537 | Zero(PL_reg_poscache, size, char); | |
4538 | } | |
4539 | else { | |
4540 | PL_reg_poscache_size = size; | |
a02a5408 | 4541 | Newxz(PL_reg_poscache, size, char); |
2c2d71f5 | 4542 | } |
c476f425 DM |
4543 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
4544 | "%swhilem: Detected a super-linear match, switching on caching%s...\n", | |
4545 | PL_colors[4], PL_colors[5]) | |
4546 | ); | |
2c2d71f5 | 4547 | } |
c476f425 | 4548 | |
2c2d71f5 | 4549 | if (PL_reg_leftiter < 0) { |
c476f425 DM |
4550 | /* have we already failed at this position? */ |
4551 | I32 offset, mask; | |
4552 | offset = (scan->flags & 0xf) - 1 | |
4553 | + (locinput - PL_bostr) * (scan->flags>>4); | |
4554 | mask = 1 << (offset % 8); | |
4555 | offset /= 8; | |
4556 | if (PL_reg_poscache[offset] & mask) { | |
4557 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, | |
4558 | "%*s whilem: (cache) already tried at this position...\n", | |
4559 | REPORT_CODE_OFF+depth*2, "") | |
2c2d71f5 | 4560 | ); |
3298f257 | 4561 | sayNO; /* cache records failure */ |
2c2d71f5 | 4562 | } |
c476f425 DM |
4563 | ST.cache_offset = offset; |
4564 | ST.cache_mask = mask; | |
2c2d71f5 | 4565 | } |
c476f425 | 4566 | } |
2c2d71f5 | 4567 | |
c476f425 | 4568 | /* Prefer B over A for minimal matching. */ |
a687059c | 4569 | |
c476f425 DM |
4570 | if (cur_curlyx->u.curlyx.minmod) { |
4571 | ST.save_curlyx = cur_curlyx; | |
4572 | cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx; | |
4573 | ST.cp = regcppush(ST.save_curlyx->u.curlyx.parenfloor); | |
4574 | REGCP_SET(ST.lastcp); | |
4575 | PUSH_YES_STATE_GOTO(WHILEM_B_min, ST.save_curlyx->u.curlyx.B); | |
4576 | /* NOTREACHED */ | |
4577 | } | |
a0d0e21e | 4578 | |
c476f425 DM |
4579 | /* Prefer A over B for maximal matching. */ |
4580 | ||
d02d6d97 | 4581 | if (n < max) { /* More greed allowed? */ |
c476f425 DM |
4582 | ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor); |
4583 | cur_curlyx->u.curlyx.lastloc = locinput; | |
4584 | REGCP_SET(ST.lastcp); | |
d02d6d97 | 4585 | PUSH_STATE_GOTO(WHILEM_A_max, A); |
c476f425 DM |
4586 | /* NOTREACHED */ |
4587 | } | |
4588 | goto do_whilem_B_max; | |
4589 | } | |
4590 | /* NOTREACHED */ | |
4591 | ||
4592 | case WHILEM_B_min: /* just matched B in a minimal match */ | |
4593 | case WHILEM_B_max: /* just matched B in a maximal match */ | |
4594 | cur_curlyx = ST.save_curlyx; | |
4595 | sayYES; | |
4596 | /* NOTREACHED */ | |
4597 | ||
4598 | case WHILEM_B_max_fail: /* just failed to match B in a maximal match */ | |
4599 | cur_curlyx = ST.save_curlyx; | |
4600 | cur_curlyx->u.curlyx.lastloc = ST.save_lastloc; | |
4601 | cur_curlyx->u.curlyx.count--; | |
4602 | CACHEsayNO; | |
4603 | /* NOTREACHED */ | |
4604 | ||
4605 | case WHILEM_A_min_fail: /* just failed to match A in a minimal match */ | |
4606 | REGCP_UNWIND(ST.lastcp); | |
4607 | regcppop(rex); | |
4608 | /* FALL THROUGH */ | |
4609 | case WHILEM_A_pre_fail: /* just failed to match even minimal A */ | |
4610 | cur_curlyx->u.curlyx.lastloc = ST.save_lastloc; | |
4611 | cur_curlyx->u.curlyx.count--; | |
4612 | CACHEsayNO; | |
4613 | /* NOTREACHED */ | |
4614 | ||
4615 | case WHILEM_A_max_fail: /* just failed to match A in a maximal match */ | |
4616 | REGCP_UNWIND(ST.lastcp); | |
4617 | regcppop(rex); /* Restore some previous $<digit>s? */ | |
4618 | PL_reginput = locinput; | |
4619 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, | |
4620 | "%*s whilem: failed, trying continuation...\n", | |
4621 | REPORT_CODE_OFF+depth*2, "") | |
4622 | ); | |
4623 | do_whilem_B_max: | |
4624 | if (cur_curlyx->u.curlyx.count >= REG_INFTY | |
4625 | && ckWARN(WARN_REGEXP) | |
4626 | && !(PL_reg_flags & RF_warned)) | |
4627 | { | |
4628 | PL_reg_flags |= RF_warned; | |
4629 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s limit (%d) exceeded", | |
4630 | "Complex regular subexpression recursion", | |
4631 | REG_INFTY - 1); | |
4632 | } | |
4633 | ||
4634 | /* now try B */ | |
4635 | ST.save_curlyx = cur_curlyx; | |
4636 | cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx; | |
4637 | PUSH_YES_STATE_GOTO(WHILEM_B_max, ST.save_curlyx->u.curlyx.B); | |
4638 | /* NOTREACHED */ | |
4639 | ||
4640 | case WHILEM_B_min_fail: /* just failed to match B in a minimal match */ | |
4641 | cur_curlyx = ST.save_curlyx; | |
4642 | REGCP_UNWIND(ST.lastcp); | |
4643 | regcppop(rex); | |
4644 | ||
d02d6d97 | 4645 | if (cur_curlyx->u.curlyx.count >= /*max*/ARG2(cur_curlyx->u.curlyx.me)) { |
c476f425 DM |
4646 | /* Maximum greed exceeded */ |
4647 | if (cur_curlyx->u.curlyx.count >= REG_INFTY | |
4648 | && ckWARN(WARN_REGEXP) | |
4649 | && !(PL_reg_flags & RF_warned)) | |
4650 | { | |
3280af22 | 4651 | PL_reg_flags |= RF_warned; |
c476f425 DM |
4652 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), |
4653 | "%s limit (%d) exceeded", | |
4654 | "Complex regular subexpression recursion", | |
4655 | REG_INFTY - 1); | |
a0d0e21e | 4656 | } |
c476f425 | 4657 | cur_curlyx->u.curlyx.count--; |
3ab3c9b4 | 4658 | CACHEsayNO; |
a0d0e21e | 4659 | } |
c476f425 DM |
4660 | |
4661 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, | |
4662 | "%*s trying longer...\n", REPORT_CODE_OFF+depth*2, "") | |
4663 | ); | |
4664 | /* Try grabbing another A and see if it helps. */ | |
4665 | PL_reginput = locinput; | |
4666 | cur_curlyx->u.curlyx.lastloc = locinput; | |
4667 | ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor); | |
4668 | REGCP_SET(ST.lastcp); | |
d02d6d97 DM |
4669 | PUSH_STATE_GOTO(WHILEM_A_min, |
4670 | /*A*/ NEXTOPER(ST.save_curlyx->u.curlyx.me) + EXTRA_STEP_2ARGS); | |
5f66b61c | 4671 | /* NOTREACHED */ |
40a82448 DM |
4672 | |
4673 | #undef ST | |
4674 | #define ST st->u.branch | |
4675 | ||
4676 | case BRANCHJ: /* /(...|A|...)/ with long next pointer */ | |
c277df42 IZ |
4677 | next = scan + ARG(scan); |
4678 | if (next == scan) | |
4679 | next = NULL; | |
40a82448 DM |
4680 | scan = NEXTOPER(scan); |
4681 | /* FALL THROUGH */ | |
c277df42 | 4682 | |
40a82448 DM |
4683 | case BRANCH: /* /(...|A|...)/ */ |
4684 | scan = NEXTOPER(scan); /* scan now points to inner node */ | |
40a82448 DM |
4685 | ST.lastparen = *PL_reglastparen; |
4686 | ST.next_branch = next; | |
4687 | REGCP_SET(ST.cp); | |
4688 | PL_reginput = locinput; | |
02db2b7b | 4689 | |
40a82448 | 4690 | /* Now go into the branch */ |
5d458dd8 YO |
4691 | if (has_cutgroup) { |
4692 | PUSH_YES_STATE_GOTO(BRANCH_next, scan); | |
4693 | } else { | |
4694 | PUSH_STATE_GOTO(BRANCH_next, scan); | |
4695 | } | |
40a82448 | 4696 | /* NOTREACHED */ |
5d458dd8 YO |
4697 | case CUTGROUP: |
4698 | PL_reginput = locinput; | |
4699 | sv_yes_mark = st->u.mark.mark_name = scan->flags ? NULL : | |
ad64d0ec | 4700 | MUTABLE_SV(rexi->data->data[ ARG( scan ) ]); |
5d458dd8 YO |
4701 | PUSH_STATE_GOTO(CUTGROUP_next,next); |
4702 | /* NOTREACHED */ | |
4703 | case CUTGROUP_next_fail: | |
4704 | do_cutgroup = 1; | |
4705 | no_final = 1; | |
4706 | if (st->u.mark.mark_name) | |
4707 | sv_commit = st->u.mark.mark_name; | |
4708 | sayNO; | |
4709 | /* NOTREACHED */ | |
4710 | case BRANCH_next: | |
4711 | sayYES; | |
4712 | /* NOTREACHED */ | |
40a82448 | 4713 | case BRANCH_next_fail: /* that branch failed; try the next, if any */ |
5d458dd8 YO |
4714 | if (do_cutgroup) { |
4715 | do_cutgroup = 0; | |
4716 | no_final = 0; | |
4717 | } | |
40a82448 DM |
4718 | REGCP_UNWIND(ST.cp); |
4719 | for (n = *PL_reglastparen; n > ST.lastparen; n--) | |
f0ab9afb | 4720 | PL_regoffs[n].end = -1; |
40a82448 | 4721 | *PL_reglastparen = n; |
0a4db386 | 4722 | /*dmq: *PL_reglastcloseparen = n; */ |
40a82448 DM |
4723 | scan = ST.next_branch; |
4724 | /* no more branches? */ | |
5d458dd8 YO |
4725 | if (!scan || (OP(scan) != BRANCH && OP(scan) != BRANCHJ)) { |
4726 | DEBUG_EXECUTE_r({ | |
4727 | PerlIO_printf( Perl_debug_log, | |
4728 | "%*s %sBRANCH failed...%s\n", | |
4729 | REPORT_CODE_OFF+depth*2, "", | |
4730 | PL_colors[4], | |
4731 | PL_colors[5] ); | |
4732 | }); | |
4733 | sayNO_SILENT; | |
4734 | } | |
40a82448 DM |
4735 | continue; /* execute next BRANCH[J] op */ |
4736 | /* NOTREACHED */ | |
4737 | ||
a0d0e21e | 4738 | case MINMOD: |
24d3c4a9 | 4739 | minmod = 1; |
a0d0e21e | 4740 | break; |
40a82448 DM |
4741 | |
4742 | #undef ST | |
4743 | #define ST st->u.curlym | |
4744 | ||
4745 | case CURLYM: /* /A{m,n}B/ where A is fixed-length */ | |
4746 | ||
4747 | /* This is an optimisation of CURLYX that enables us to push | |
84d2fa14 | 4748 | * only a single backtracking state, no matter how many matches |
40a82448 DM |
4749 | * there are in {m,n}. It relies on the pattern being constant |
4750 | * length, with no parens to influence future backrefs | |
4751 | */ | |
4752 | ||
4753 | ST.me = scan; | |
dc45a647 | 4754 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
40a82448 DM |
4755 | |
4756 | /* if paren positive, emulate an OPEN/CLOSE around A */ | |
4757 | if (ST.me->flags) { | |
3b6647e0 | 4758 | U32 paren = ST.me->flags; |
40a82448 DM |
4759 | if (paren > PL_regsize) |
4760 | PL_regsize = paren; | |
3b6647e0 | 4761 | if (paren > *PL_reglastparen) |
40a82448 | 4762 | *PL_reglastparen = paren; |
c277df42 | 4763 | scan += NEXT_OFF(scan); /* Skip former OPEN. */ |
6407bf3b | 4764 | } |
40a82448 DM |
4765 | ST.A = scan; |
4766 | ST.B = next; | |
4767 | ST.alen = 0; | |
4768 | ST.count = 0; | |
24d3c4a9 DM |
4769 | ST.minmod = minmod; |
4770 | minmod = 0; | |
40a82448 DM |
4771 | ST.c1 = CHRTEST_UNINIT; |
4772 | REGCP_SET(ST.cp); | |
6407bf3b | 4773 | |
40a82448 DM |
4774 | if (!(ST.minmod ? ARG1(ST.me) : ARG2(ST.me))) /* min/max */ |
4775 | goto curlym_do_B; | |
4776 | ||
4777 | curlym_do_A: /* execute the A in /A{m,n}B/ */ | |
6407bf3b | 4778 | PL_reginput = locinput; |
40a82448 DM |
4779 | PUSH_YES_STATE_GOTO(CURLYM_A, ST.A); /* match A */ |
4780 | /* NOTREACHED */ | |
5f80c4cf | 4781 | |
40a82448 DM |
4782 | case CURLYM_A: /* we've just matched an A */ |
4783 | locinput = st->locinput; | |
4784 | nextchr = UCHARAT(locinput); | |
4785 | ||
4786 | ST.count++; | |
4787 | /* after first match, determine A's length: u.curlym.alen */ | |
4788 | if (ST.count == 1) { | |
4789 | if (PL_reg_match_utf8) { | |
4790 | char *s = locinput; | |
4791 | while (s < PL_reginput) { | |
4792 | ST.alen++; | |
4793 | s += UTF8SKIP(s); | |
4794 | } | |
4795 | } | |
4796 | else { | |
4797 | ST.alen = PL_reginput - locinput; | |
4798 | } | |
4799 | if (ST.alen == 0) | |
4800 | ST.count = ST.minmod ? ARG1(ST.me) : ARG2(ST.me); | |
4801 | } | |
0cadcf80 DM |
4802 | DEBUG_EXECUTE_r( |
4803 | PerlIO_printf(Perl_debug_log, | |
40a82448 | 4804 | "%*s CURLYM now matched %"IVdf" times, len=%"IVdf"...\n", |
5bc10b2c | 4805 | (int)(REPORT_CODE_OFF+(depth*2)), "", |
40a82448 | 4806 | (IV) ST.count, (IV)ST.alen) |
0cadcf80 DM |
4807 | ); |
4808 | ||
40a82448 | 4809 | locinput = PL_reginput; |
0a4db386 YO |
4810 | |
4811 | if (cur_eval && cur_eval->u.eval.close_paren && | |
24b23f37 | 4812 | cur_eval->u.eval.close_paren == (U32)ST.me->flags) |
0a4db386 YO |
4813 | goto fake_end; |
4814 | ||
c966426a DM |
4815 | { |
4816 | I32 max = (ST.minmod ? ARG1(ST.me) : ARG2(ST.me)); | |
4817 | if ( max == REG_INFTY || ST.count < max ) | |
4818 | goto curlym_do_A; /* try to match another A */ | |
4819 | } | |
40a82448 | 4820 | goto curlym_do_B; /* try to match B */ |
5f80c4cf | 4821 | |
40a82448 DM |
4822 | case CURLYM_A_fail: /* just failed to match an A */ |
4823 | REGCP_UNWIND(ST.cp); | |
0a4db386 YO |
4824 | |
4825 | if (ST.minmod || ST.count < ARG1(ST.me) /* min*/ | |
4826 | || (cur_eval && cur_eval->u.eval.close_paren && | |
24b23f37 | 4827 | cur_eval->u.eval.close_paren == (U32)ST.me->flags)) |
40a82448 | 4828 | sayNO; |
0cadcf80 | 4829 | |
40a82448 DM |
4830 | curlym_do_B: /* execute the B in /A{m,n}B/ */ |
4831 | PL_reginput = locinput; | |
4832 | if (ST.c1 == CHRTEST_UNINIT) { | |
4833 | /* calculate c1 and c2 for possible match of 1st char | |
4834 | * following curly */ | |
4835 | ST.c1 = ST.c2 = CHRTEST_VOID; | |
4836 | if (HAS_TEXT(ST.B) || JUMPABLE(ST.B)) { | |
4837 | regnode *text_node = ST.B; | |
4838 | if (! HAS_TEXT(text_node)) | |
4839 | FIND_NEXT_IMPT(text_node); | |
ee9b8eae YO |
4840 | /* this used to be |
4841 | ||
4842 | (HAS_TEXT(text_node) && PL_regkind[OP(text_node)] == EXACT) | |
4843 | ||
4844 | But the former is redundant in light of the latter. | |
4845 | ||
4846 | if this changes back then the macro for | |
4847 | IS_TEXT and friends need to change. | |
4848 | */ | |
4849 | if (PL_regkind[OP(text_node)] == EXACT) | |
40a82448 | 4850 | { |
ee9b8eae | 4851 | |
40a82448 DM |
4852 | ST.c1 = (U8)*STRING(text_node); |
4853 | ST.c2 = | |
ee9b8eae | 4854 | (IS_TEXTF(text_node)) |
40a82448 | 4855 | ? PL_fold[ST.c1] |
ee9b8eae | 4856 | : (IS_TEXTFL(text_node)) |
40a82448 DM |
4857 | ? PL_fold_locale[ST.c1] |
4858 | : ST.c1; | |
c277df42 | 4859 | } |
c277df42 | 4860 | } |
40a82448 DM |
4861 | } |
4862 | ||
4863 | DEBUG_EXECUTE_r( | |
4864 | PerlIO_printf(Perl_debug_log, | |
4865 | "%*s CURLYM trying tail with matches=%"IVdf"...\n", | |
5bc10b2c | 4866 | (int)(REPORT_CODE_OFF+(depth*2)), |
40a82448 DM |
4867 | "", (IV)ST.count) |
4868 | ); | |
4869 | if (ST.c1 != CHRTEST_VOID | |
4870 | && UCHARAT(PL_reginput) != ST.c1 | |
4871 | && UCHARAT(PL_reginput) != ST.c2) | |
4872 | { | |
4873 | /* simulate B failing */ | |
3e901dc0 YO |
4874 | DEBUG_OPTIMISE_r( |
4875 | PerlIO_printf(Perl_debug_log, | |
4876 | "%*s CURLYM Fast bail c1=%"IVdf" c2=%"IVdf"\n", | |
4877 | (int)(REPORT_CODE_OFF+(depth*2)),"", | |
4878 | (IV)ST.c1,(IV)ST.c2 | |
4879 | )); | |
40a82448 DM |
4880 | state_num = CURLYM_B_fail; |
4881 | goto reenter_switch; | |
4882 | } | |
4883 | ||
4884 | if (ST.me->flags) { | |
4885 | /* mark current A as captured */ | |
4886 | I32 paren = ST.me->flags; | |
4887 | if (ST.count) { | |
f0ab9afb | 4888 | PL_regoffs[paren].start |
40a82448 | 4889 | = HOPc(PL_reginput, -ST.alen) - PL_bostr; |
f0ab9afb | 4890 | PL_regoffs[paren].end = PL_reginput - PL_bostr; |
0a4db386 | 4891 | /*dmq: *PL_reglastcloseparen = paren; */ |
c277df42 | 4892 | } |
40a82448 | 4893 | else |
f0ab9afb | 4894 | PL_regoffs[paren].end = -1; |
0a4db386 | 4895 | if (cur_eval && cur_eval->u.eval.close_paren && |
24b23f37 | 4896 | cur_eval->u.eval.close_paren == (U32)ST.me->flags) |
0a4db386 YO |
4897 | { |
4898 | if (ST.count) | |
4899 | goto fake_end; | |
4900 | else | |
4901 | sayNO; | |
4902 | } | |
c277df42 | 4903 | } |
0a4db386 | 4904 | |
40a82448 | 4905 | PUSH_STATE_GOTO(CURLYM_B, ST.B); /* match B */ |
5f66b61c | 4906 | /* NOTREACHED */ |
40a82448 DM |
4907 | |
4908 | case CURLYM_B_fail: /* just failed to match a B */ | |
4909 | REGCP_UNWIND(ST.cp); | |
4910 | if (ST.minmod) { | |
84d2fa14 HS |
4911 | I32 max = ARG2(ST.me); |
4912 | if (max != REG_INFTY && ST.count == max) | |
40a82448 DM |
4913 | sayNO; |
4914 | goto curlym_do_A; /* try to match a further A */ | |
4915 | } | |
4916 | /* backtrack one A */ | |
4917 | if (ST.count == ARG1(ST.me) /* min */) | |
4918 | sayNO; | |
4919 | ST.count--; | |
4920 | locinput = HOPc(locinput, -ST.alen); | |
4921 | goto curlym_do_B; /* try to match B */ | |
4922 | ||
c255a977 DM |
4923 | #undef ST |
4924 | #define ST st->u.curly | |
40a82448 | 4925 | |
c255a977 DM |
4926 | #define CURLY_SETPAREN(paren, success) \ |
4927 | if (paren) { \ | |
4928 | if (success) { \ | |
f0ab9afb NC |
4929 | PL_regoffs[paren].start = HOPc(locinput, -1) - PL_bostr; \ |
4930 | PL_regoffs[paren].end = locinput - PL_bostr; \ | |
0a4db386 | 4931 | *PL_reglastcloseparen = paren; \ |
c255a977 DM |
4932 | } \ |
4933 | else \ | |
f0ab9afb | 4934 | PL_regoffs[paren].end = -1; \ |
c255a977 DM |
4935 | } |
4936 | ||
4937 | case STAR: /* /A*B/ where A is width 1 */ | |
4938 | ST.paren = 0; | |
4939 | ST.min = 0; | |
4940 | ST.max = REG_INFTY; | |
a0d0e21e LW |
4941 | scan = NEXTOPER(scan); |
4942 | goto repeat; | |
c255a977 DM |
4943 | case PLUS: /* /A+B/ where A is width 1 */ |
4944 | ST.paren = 0; | |
4945 | ST.min = 1; | |
4946 | ST.max = REG_INFTY; | |
c277df42 | 4947 | scan = NEXTOPER(scan); |
c255a977 DM |
4948 | goto repeat; |
4949 | case CURLYN: /* /(A){m,n}B/ where A is width 1 */ | |
4950 | ST.paren = scan->flags; /* Which paren to set */ | |
4951 | if (ST.paren > PL_regsize) | |
4952 | PL_regsize = ST.paren; | |
3b6647e0 | 4953 | if (ST.paren > *PL_reglastparen) |
c255a977 DM |
4954 | *PL_reglastparen = ST.paren; |
4955 | ST.min = ARG1(scan); /* min to match */ | |
4956 | ST.max = ARG2(scan); /* max to match */ | |
0a4db386 | 4957 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 4958 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
0a4db386 YO |
4959 | ST.min=1; |
4960 | ST.max=1; | |
4961 | } | |
c255a977 DM |
4962 | scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE); |
4963 | goto repeat; | |
4964 | case CURLY: /* /A{m,n}B/ where A is width 1 */ | |
4965 | ST.paren = 0; | |
4966 | ST.min = ARG1(scan); /* min to match */ | |
4967 | ST.max = ARG2(scan); /* max to match */ | |
4968 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; | |
c277df42 | 4969 | repeat: |
a0d0e21e LW |
4970 | /* |
4971 | * Lookahead to avoid useless match attempts | |
4972 | * when we know what character comes next. | |
c255a977 | 4973 | * |
5f80c4cf JP |
4974 | * Used to only do .*x and .*?x, but now it allows |
4975 | * for )'s, ('s and (?{ ... })'s to be in the way | |
4976 | * of the quantifier and the EXACT-like node. -- japhy | |
4977 | */ | |
4978 | ||
c255a977 DM |
4979 | if (ST.min > ST.max) /* XXX make this a compile-time check? */ |
4980 | sayNO; | |
cca55fe3 | 4981 | if (HAS_TEXT(next) || JUMPABLE(next)) { |
5f80c4cf JP |
4982 | U8 *s; |
4983 | regnode *text_node = next; | |
4984 | ||
3dab1dad YO |
4985 | if (! HAS_TEXT(text_node)) |
4986 | FIND_NEXT_IMPT(text_node); | |
5f80c4cf | 4987 | |
9e137952 | 4988 | if (! HAS_TEXT(text_node)) |
c255a977 | 4989 | ST.c1 = ST.c2 = CHRTEST_VOID; |
5f80c4cf | 4990 | else { |
ee9b8eae | 4991 | if ( PL_regkind[OP(text_node)] != EXACT ) { |
c255a977 | 4992 | ST.c1 = ST.c2 = CHRTEST_VOID; |
44a68960 | 4993 | goto assume_ok_easy; |
cca55fe3 | 4994 | } |
be8e71aa YO |
4995 | else |
4996 | s = (U8*)STRING(text_node); | |
ee9b8eae YO |
4997 | |
4998 | /* Currently we only get here when | |
4999 | ||
5000 | PL_rekind[OP(text_node)] == EXACT | |
5001 | ||
5002 | if this changes back then the macro for IS_TEXT and | |
5003 | friends need to change. */ | |
f2ed9b32 | 5004 | if (!UTF_PATTERN) { |
c255a977 | 5005 | ST.c2 = ST.c1 = *s; |
ee9b8eae | 5006 | if (IS_TEXTF(text_node)) |
c255a977 | 5007 | ST.c2 = PL_fold[ST.c1]; |
ee9b8eae | 5008 | else if (IS_TEXTFL(text_node)) |
c255a977 | 5009 | ST.c2 = PL_fold_locale[ST.c1]; |
1aa99e6b | 5010 | } |
f2ed9b32 | 5011 | else { /* UTF_PATTERN */ |
ee9b8eae | 5012 | if (IS_TEXTF(text_node)) { |
a2a2844f | 5013 | STRLEN ulen1, ulen2; |
89ebb4a3 JH |
5014 | U8 tmpbuf1[UTF8_MAXBYTES_CASE+1]; |
5015 | U8 tmpbuf2[UTF8_MAXBYTES_CASE+1]; | |
a2a2844f JH |
5016 | |
5017 | to_utf8_lower((U8*)s, tmpbuf1, &ulen1); | |
5018 | to_utf8_upper((U8*)s, tmpbuf2, &ulen2); | |
e294cc5d JH |
5019 | #ifdef EBCDIC |
5020 | ST.c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXLEN, 0, | |
5021 | ckWARN(WARN_UTF8) ? | |
5022 | 0 : UTF8_ALLOW_ANY); | |
5023 | ST.c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXLEN, 0, | |
5024 | ckWARN(WARN_UTF8) ? | |
5025 | 0 : UTF8_ALLOW_ANY); | |
5026 | #else | |
c255a977 | 5027 | ST.c1 = utf8n_to_uvuni(tmpbuf1, UTF8_MAXBYTES, 0, |
e294cc5d | 5028 | uniflags); |
c255a977 | 5029 | ST.c2 = utf8n_to_uvuni(tmpbuf2, UTF8_MAXBYTES, 0, |
e294cc5d JH |
5030 | uniflags); |
5031 | #endif | |
5f80c4cf JP |
5032 | } |
5033 | else { | |
c255a977 | 5034 | ST.c2 = ST.c1 = utf8n_to_uvchr(s, UTF8_MAXBYTES, 0, |
041457d9 | 5035 | uniflags); |
5f80c4cf | 5036 | } |
1aa99e6b IH |
5037 | } |
5038 | } | |
bbce6d69 | 5039 | } |
a0d0e21e | 5040 | else |
c255a977 | 5041 | ST.c1 = ST.c2 = CHRTEST_VOID; |
cca55fe3 | 5042 | assume_ok_easy: |
c255a977 DM |
5043 | |
5044 | ST.A = scan; | |
5045 | ST.B = next; | |
3280af22 | 5046 | PL_reginput = locinput; |
24d3c4a9 DM |
5047 | if (minmod) { |
5048 | minmod = 0; | |
e2e6a0f1 | 5049 | if (ST.min && regrepeat(rex, ST.A, ST.min, depth) < ST.min) |
4633a7c4 | 5050 | sayNO; |
c255a977 | 5051 | ST.count = ST.min; |
a0ed51b3 | 5052 | locinput = PL_reginput; |
c255a977 DM |
5053 | REGCP_SET(ST.cp); |
5054 | if (ST.c1 == CHRTEST_VOID) | |
5055 | goto curly_try_B_min; | |
5056 | ||
5057 | ST.oldloc = locinput; | |
5058 | ||
5059 | /* set ST.maxpos to the furthest point along the | |
5060 | * string that could possibly match */ | |
5061 | if (ST.max == REG_INFTY) { | |
5062 | ST.maxpos = PL_regeol - 1; | |
f2ed9b32 | 5063 | if (utf8_target) |
c255a977 DM |
5064 | while (UTF8_IS_CONTINUATION(*(U8*)ST.maxpos)) |
5065 | ST.maxpos--; | |
5066 | } | |
f2ed9b32 | 5067 | else if (utf8_target) { |
c255a977 DM |
5068 | int m = ST.max - ST.min; |
5069 | for (ST.maxpos = locinput; | |
5070 | m >0 && ST.maxpos + UTF8SKIP(ST.maxpos) <= PL_regeol; m--) | |
5071 | ST.maxpos += UTF8SKIP(ST.maxpos); | |
5072 | } | |
5073 | else { | |
5074 | ST.maxpos = locinput + ST.max - ST.min; | |
5075 | if (ST.maxpos >= PL_regeol) | |
5076 | ST.maxpos = PL_regeol - 1; | |
5077 | } | |
5078 | goto curly_try_B_min_known; | |
5079 | ||
5080 | } | |
5081 | else { | |
e2e6a0f1 | 5082 | ST.count = regrepeat(rex, ST.A, ST.max, depth); |
c255a977 DM |
5083 | locinput = PL_reginput; |
5084 | if (ST.count < ST.min) | |
5085 | sayNO; | |
5086 | if ((ST.count > ST.min) | |
5087 | && (PL_regkind[OP(ST.B)] == EOL) && (OP(ST.B) != MEOL)) | |
5088 | { | |
5089 | /* A{m,n} must come at the end of the string, there's | |
5090 | * no point in backing off ... */ | |
5091 | ST.min = ST.count; | |
5092 | /* ...except that $ and \Z can match before *and* after | |
5093 | newline at the end. Consider "\n\n" =~ /\n+\Z\n/. | |
5094 | We may back off by one in this case. */ | |
5095 | if (UCHARAT(PL_reginput - 1) == '\n' && OP(ST.B) != EOS) | |
5096 | ST.min--; | |
5097 | } | |
5098 | REGCP_SET(ST.cp); | |
5099 | goto curly_try_B_max; | |
5100 | } | |
5101 | /* NOTREACHED */ | |
5102 | ||
5103 | ||
5104 | case CURLY_B_min_known_fail: | |
5105 | /* failed to find B in a non-greedy match where c1,c2 valid */ | |
5106 | if (ST.paren && ST.count) | |
f0ab9afb | 5107 | PL_regoffs[ST.paren].end = -1; |
c255a977 DM |
5108 | |
5109 | PL_reginput = locinput; /* Could be reset... */ | |
5110 | REGCP_UNWIND(ST.cp); | |
5111 | /* Couldn't or didn't -- move forward. */ | |
5112 | ST.oldloc = locinput; | |
f2ed9b32 | 5113 | if (utf8_target) |
c255a977 DM |
5114 | locinput += UTF8SKIP(locinput); |
5115 | else | |
5116 | locinput++; | |
5117 | ST.count++; | |
5118 | curly_try_B_min_known: | |
5119 | /* find the next place where 'B' could work, then call B */ | |
5120 | { | |
5121 | int n; | |
f2ed9b32 | 5122 | if (utf8_target) { |
c255a977 DM |
5123 | n = (ST.oldloc == locinput) ? 0 : 1; |
5124 | if (ST.c1 == ST.c2) { | |
5125 | STRLEN len; | |
5126 | /* set n to utf8_distance(oldloc, locinput) */ | |
5127 | while (locinput <= ST.maxpos && | |
5128 | utf8n_to_uvchr((U8*)locinput, | |
5129 | UTF8_MAXBYTES, &len, | |
5130 | uniflags) != (UV)ST.c1) { | |
5131 | locinput += len; | |
5132 | n++; | |
5133 | } | |
1aa99e6b IH |
5134 | } |
5135 | else { | |
c255a977 DM |
5136 | /* set n to utf8_distance(oldloc, locinput) */ |
5137 | while (locinput <= ST.maxpos) { | |
5138 | STRLEN len; | |
5139 | const UV c = utf8n_to_uvchr((U8*)locinput, | |
5140 | UTF8_MAXBYTES, &len, | |
5141 | uniflags); | |
5142 | if (c == (UV)ST.c1 || c == (UV)ST.c2) | |
5143 | break; | |
5144 | locinput += len; | |
5145 | n++; | |
1aa99e6b | 5146 | } |
0fe9bf95 IZ |
5147 | } |
5148 | } | |
c255a977 DM |
5149 | else { |
5150 | if (ST.c1 == ST.c2) { | |
5151 | while (locinput <= ST.maxpos && | |
5152 | UCHARAT(locinput) != ST.c1) | |
5153 | locinput++; | |
bbce6d69 | 5154 | } |
c255a977 DM |
5155 | else { |
5156 | while (locinput <= ST.maxpos | |
5157 | && UCHARAT(locinput) != ST.c1 | |
5158 | && UCHARAT(locinput) != ST.c2) | |
5159 | locinput++; | |
a0ed51b3 | 5160 | } |
c255a977 DM |
5161 | n = locinput - ST.oldloc; |
5162 | } | |
5163 | if (locinput > ST.maxpos) | |
5164 | sayNO; | |
5165 | /* PL_reginput == oldloc now */ | |
5166 | if (n) { | |
5167 | ST.count += n; | |
e2e6a0f1 | 5168 | if (regrepeat(rex, ST.A, n, depth) < n) |
4633a7c4 | 5169 | sayNO; |
a0d0e21e | 5170 | } |
c255a977 DM |
5171 | PL_reginput = locinput; |
5172 | CURLY_SETPAREN(ST.paren, ST.count); | |
0a4db386 | 5173 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 5174 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
0a4db386 YO |
5175 | goto fake_end; |
5176 | } | |
c255a977 | 5177 | PUSH_STATE_GOTO(CURLY_B_min_known, ST.B); |
a0d0e21e | 5178 | } |
c255a977 DM |
5179 | /* NOTREACHED */ |
5180 | ||
5181 | ||
5182 | case CURLY_B_min_fail: | |
5183 | /* failed to find B in a non-greedy match where c1,c2 invalid */ | |
5184 | if (ST.paren && ST.count) | |
f0ab9afb | 5185 | PL_regoffs[ST.paren].end = -1; |
c255a977 DM |
5186 | |
5187 | REGCP_UNWIND(ST.cp); | |
5188 | /* failed -- move forward one */ | |
5189 | PL_reginput = locinput; | |
e2e6a0f1 | 5190 | if (regrepeat(rex, ST.A, 1, depth)) { |
c255a977 | 5191 | ST.count++; |
a0ed51b3 | 5192 | locinput = PL_reginput; |
c255a977 DM |
5193 | if (ST.count <= ST.max || (ST.max == REG_INFTY && |
5194 | ST.count > 0)) /* count overflow ? */ | |
15272685 | 5195 | { |
c255a977 DM |
5196 | curly_try_B_min: |
5197 | CURLY_SETPAREN(ST.paren, ST.count); | |
0a4db386 | 5198 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 5199 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
0a4db386 YO |
5200 | goto fake_end; |
5201 | } | |
c255a977 | 5202 | PUSH_STATE_GOTO(CURLY_B_min, ST.B); |
a0d0e21e LW |
5203 | } |
5204 | } | |
4633a7c4 | 5205 | sayNO; |
c255a977 DM |
5206 | /* NOTREACHED */ |
5207 | ||
5208 | ||
5209 | curly_try_B_max: | |
5210 | /* a successful greedy match: now try to match B */ | |
40d049e4 | 5211 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 5212 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
40d049e4 YO |
5213 | goto fake_end; |
5214 | } | |
c255a977 DM |
5215 | { |
5216 | UV c = 0; | |
5217 | if (ST.c1 != CHRTEST_VOID) | |
f2ed9b32 | 5218 | c = utf8_target ? utf8n_to_uvchr((U8*)PL_reginput, |
c255a977 | 5219 | UTF8_MAXBYTES, 0, uniflags) |
466787eb | 5220 | : (UV) UCHARAT(PL_reginput); |
c255a977 DM |
5221 | /* If it could work, try it. */ |
5222 | if (ST.c1 == CHRTEST_VOID || c == (UV)ST.c1 || c == (UV)ST.c2) { | |
5223 | CURLY_SETPAREN(ST.paren, ST.count); | |
5224 | PUSH_STATE_GOTO(CURLY_B_max, ST.B); | |
5225 | /* NOTREACHED */ | |
5226 | } | |
5227 | } | |
5228 | /* FALL THROUGH */ | |
5229 | case CURLY_B_max_fail: | |
5230 | /* failed to find B in a greedy match */ | |
5231 | if (ST.paren && ST.count) | |
f0ab9afb | 5232 | PL_regoffs[ST.paren].end = -1; |
c255a977 DM |
5233 | |
5234 | REGCP_UNWIND(ST.cp); | |
5235 | /* back up. */ | |
5236 | if (--ST.count < ST.min) | |
5237 | sayNO; | |
5238 | PL_reginput = locinput = HOPc(locinput, -1); | |
5239 | goto curly_try_B_max; | |
5240 | ||
5241 | #undef ST | |
5242 | ||
a0d0e21e | 5243 | case END: |
6bda09f9 | 5244 | fake_end: |
faec1544 DM |
5245 | if (cur_eval) { |
5246 | /* we've just finished A in /(??{A})B/; now continue with B */ | |
5247 | I32 tmpix; | |
faec1544 DM |
5248 | st->u.eval.toggle_reg_flags |
5249 | = cur_eval->u.eval.toggle_reg_flags; | |
5250 | PL_reg_flags ^= st->u.eval.toggle_reg_flags; | |
5251 | ||
288b8c02 NC |
5252 | st->u.eval.prev_rex = rex_sv; /* inner */ |
5253 | SETREX(rex_sv,cur_eval->u.eval.prev_rex); | |
5254 | rex = (struct regexp *)SvANY(rex_sv); | |
f8fc2ecf | 5255 | rexi = RXi_GET(rex); |
faec1544 | 5256 | cur_curlyx = cur_eval->u.eval.prev_curlyx; |
288b8c02 | 5257 | ReREFCNT_inc(rex_sv); |
faec1544 | 5258 | st->u.eval.cp = regcppush(0); /* Save *all* the positions. */ |
34a81e2b B |
5259 | |
5260 | /* rex was changed so update the pointer in PL_reglastparen and PL_reglastcloseparen */ | |
5261 | PL_reglastparen = &rex->lastparen; | |
5262 | PL_reglastcloseparen = &rex->lastcloseparen; | |
5263 | ||
faec1544 DM |
5264 | REGCP_SET(st->u.eval.lastcp); |
5265 | PL_reginput = locinput; | |
5266 | ||
5267 | /* Restore parens of the outer rex without popping the | |
5268 | * savestack */ | |
5269 | tmpix = PL_savestack_ix; | |
5270 | PL_savestack_ix = cur_eval->u.eval.lastcp; | |
5271 | regcppop(rex); | |
5272 | PL_savestack_ix = tmpix; | |
5273 | ||
5274 | st->u.eval.prev_eval = cur_eval; | |
5275 | cur_eval = cur_eval->u.eval.prev_eval; | |
5276 | DEBUG_EXECUTE_r( | |
2a49f0f5 JH |
5277 | PerlIO_printf(Perl_debug_log, "%*s EVAL trying tail ... %"UVxf"\n", |
5278 | REPORT_CODE_OFF+depth*2, "",PTR2UV(cur_eval));); | |
e7707071 YO |
5279 | if ( nochange_depth ) |
5280 | nochange_depth--; | |
5281 | ||
5282 | PUSH_YES_STATE_GOTO(EVAL_AB, | |
faec1544 DM |
5283 | st->u.eval.prev_eval->u.eval.B); /* match B */ |
5284 | } | |
5285 | ||
3b0527fe | 5286 | if (locinput < reginfo->till) { |
a3621e74 | 5287 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
7821416a IZ |
5288 | "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n", |
5289 | PL_colors[4], | |
5290 | (long)(locinput - PL_reg_starttry), | |
3b0527fe | 5291 | (long)(reginfo->till - PL_reg_starttry), |
7821416a | 5292 | PL_colors[5])); |
58e23c8d | 5293 | |
262b90c4 | 5294 | sayNO_SILENT; /* Cannot match: too short. */ |
7821416a IZ |
5295 | } |
5296 | PL_reginput = locinput; /* put where regtry can find it */ | |
262b90c4 | 5297 | sayYES; /* Success! */ |
dad79028 DM |
5298 | |
5299 | case SUCCEED: /* successful SUSPEND/UNLESSM/IFMATCH/CURLYM */ | |
5300 | DEBUG_EXECUTE_r( | |
5301 | PerlIO_printf(Perl_debug_log, | |
5302 | "%*s %ssubpattern success...%s\n", | |
5bc10b2c | 5303 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])); |
3280af22 | 5304 | PL_reginput = locinput; /* put where regtry can find it */ |
262b90c4 | 5305 | sayYES; /* Success! */ |
dad79028 | 5306 | |
40a82448 DM |
5307 | #undef ST |
5308 | #define ST st->u.ifmatch | |
5309 | ||
5310 | case SUSPEND: /* (?>A) */ | |
5311 | ST.wanted = 1; | |
9fe1d20c | 5312 | PL_reginput = locinput; |
9041c2e3 | 5313 | goto do_ifmatch; |
dad79028 | 5314 | |
40a82448 DM |
5315 | case UNLESSM: /* -ve lookaround: (?!A), or with flags, (?<!A) */ |
5316 | ST.wanted = 0; | |
dad79028 DM |
5317 | goto ifmatch_trivial_fail_test; |
5318 | ||
40a82448 DM |
5319 | case IFMATCH: /* +ve lookaround: (?=A), or with flags, (?<=A) */ |
5320 | ST.wanted = 1; | |
dad79028 | 5321 | ifmatch_trivial_fail_test: |
a0ed51b3 | 5322 | if (scan->flags) { |
52657f30 | 5323 | char * const s = HOPBACKc(locinput, scan->flags); |
dad79028 DM |
5324 | if (!s) { |
5325 | /* trivial fail */ | |
24d3c4a9 DM |
5326 | if (logical) { |
5327 | logical = 0; | |
f2338a2e | 5328 | sw = 1 - cBOOL(ST.wanted); |
dad79028 | 5329 | } |
40a82448 | 5330 | else if (ST.wanted) |
dad79028 DM |
5331 | sayNO; |
5332 | next = scan + ARG(scan); | |
5333 | if (next == scan) | |
5334 | next = NULL; | |
5335 | break; | |
5336 | } | |
efb30f32 | 5337 | PL_reginput = s; |
a0ed51b3 LW |
5338 | } |
5339 | else | |
5340 | PL_reginput = locinput; | |
5341 | ||
c277df42 | 5342 | do_ifmatch: |
40a82448 | 5343 | ST.me = scan; |
24d3c4a9 | 5344 | ST.logical = logical; |
24d786f4 YO |
5345 | logical = 0; /* XXX: reset state of logical once it has been saved into ST */ |
5346 | ||
40a82448 DM |
5347 | /* execute body of (?...A) */ |
5348 | PUSH_YES_STATE_GOTO(IFMATCH_A, NEXTOPER(NEXTOPER(scan))); | |
5349 | /* NOTREACHED */ | |
5350 | ||
5351 | case IFMATCH_A_fail: /* body of (?...A) failed */ | |
5352 | ST.wanted = !ST.wanted; | |
5353 | /* FALL THROUGH */ | |
5354 | ||
5355 | case IFMATCH_A: /* body of (?...A) succeeded */ | |
24d3c4a9 | 5356 | if (ST.logical) { |
f2338a2e | 5357 | sw = cBOOL(ST.wanted); |
40a82448 DM |
5358 | } |
5359 | else if (!ST.wanted) | |
5360 | sayNO; | |
5361 | ||
5362 | if (OP(ST.me) == SUSPEND) | |
5363 | locinput = PL_reginput; | |
5364 | else { | |
5365 | locinput = PL_reginput = st->locinput; | |
5366 | nextchr = UCHARAT(locinput); | |
5367 | } | |
5368 | scan = ST.me + ARG(ST.me); | |
5369 | if (scan == ST.me) | |
5370 | scan = NULL; | |
5371 | continue; /* execute B */ | |
5372 | ||
5373 | #undef ST | |
dad79028 | 5374 | |
c277df42 | 5375 | case LONGJMP: |
c277df42 IZ |
5376 | next = scan + ARG(scan); |
5377 | if (next == scan) | |
5378 | next = NULL; | |
a0d0e21e | 5379 | break; |
54612592 | 5380 | case COMMIT: |
e2e6a0f1 YO |
5381 | reginfo->cutpoint = PL_regeol; |
5382 | /* FALLTHROUGH */ | |
5d458dd8 | 5383 | case PRUNE: |
24b23f37 | 5384 | PL_reginput = locinput; |
e2e6a0f1 | 5385 | if (!scan->flags) |
ad64d0ec | 5386 | sv_yes_mark = sv_commit = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]); |
54612592 YO |
5387 | PUSH_STATE_GOTO(COMMIT_next,next); |
5388 | /* NOTREACHED */ | |
5389 | case COMMIT_next_fail: | |
5390 | no_final = 1; | |
5391 | /* FALLTHROUGH */ | |
7f69552c YO |
5392 | case OPFAIL: |
5393 | sayNO; | |
e2e6a0f1 YO |
5394 | /* NOTREACHED */ |
5395 | ||
5396 | #define ST st->u.mark | |
5397 | case MARKPOINT: | |
5398 | ST.prev_mark = mark_state; | |
5d458dd8 | 5399 | ST.mark_name = sv_commit = sv_yes_mark |
ad64d0ec | 5400 | = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]); |
e2e6a0f1 YO |
5401 | mark_state = st; |
5402 | ST.mark_loc = PL_reginput = locinput; | |
5403 | PUSH_YES_STATE_GOTO(MARKPOINT_next,next); | |
5404 | /* NOTREACHED */ | |
5405 | case MARKPOINT_next: | |
5406 | mark_state = ST.prev_mark; | |
5407 | sayYES; | |
5408 | /* NOTREACHED */ | |
5409 | case MARKPOINT_next_fail: | |
5d458dd8 | 5410 | if (popmark && sv_eq(ST.mark_name,popmark)) |
e2e6a0f1 YO |
5411 | { |
5412 | if (ST.mark_loc > startpoint) | |
5413 | reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1); | |
5414 | popmark = NULL; /* we found our mark */ | |
5415 | sv_commit = ST.mark_name; | |
5416 | ||
5417 | DEBUG_EXECUTE_r({ | |
5d458dd8 | 5418 | PerlIO_printf(Perl_debug_log, |
e2e6a0f1 YO |
5419 | "%*s %ssetting cutpoint to mark:%"SVf"...%s\n", |
5420 | REPORT_CODE_OFF+depth*2, "", | |
be2597df | 5421 | PL_colors[4], SVfARG(sv_commit), PL_colors[5]); |
e2e6a0f1 YO |
5422 | }); |
5423 | } | |
5424 | mark_state = ST.prev_mark; | |
5d458dd8 YO |
5425 | sv_yes_mark = mark_state ? |
5426 | mark_state->u.mark.mark_name : NULL; | |
e2e6a0f1 YO |
5427 | sayNO; |
5428 | /* NOTREACHED */ | |
5d458dd8 YO |
5429 | case SKIP: |
5430 | PL_reginput = locinput; | |
5431 | if (scan->flags) { | |
2bf803e2 | 5432 | /* (*SKIP) : if we fail we cut here*/ |
5d458dd8 | 5433 | ST.mark_name = NULL; |
e2e6a0f1 | 5434 | ST.mark_loc = locinput; |
5d458dd8 YO |
5435 | PUSH_STATE_GOTO(SKIP_next,next); |
5436 | } else { | |
2bf803e2 | 5437 | /* (*SKIP:NAME) : if there is a (*MARK:NAME) fail where it was, |
5d458dd8 YO |
5438 | otherwise do nothing. Meaning we need to scan |
5439 | */ | |
5440 | regmatch_state *cur = mark_state; | |
ad64d0ec | 5441 | SV *find = MUTABLE_SV(rexi->data->data[ ARG( scan ) ]); |
5d458dd8 YO |
5442 | |
5443 | while (cur) { | |
5444 | if ( sv_eq( cur->u.mark.mark_name, | |
5445 | find ) ) | |
5446 | { | |
5447 | ST.mark_name = find; | |
5448 | PUSH_STATE_GOTO( SKIP_next, next ); | |
5449 | } | |
5450 | cur = cur->u.mark.prev_mark; | |
5451 | } | |
e2e6a0f1 | 5452 | } |
2bf803e2 | 5453 | /* Didn't find our (*MARK:NAME) so ignore this (*SKIP:NAME) */ |
5d458dd8 YO |
5454 | break; |
5455 | case SKIP_next_fail: | |
5456 | if (ST.mark_name) { | |
5457 | /* (*CUT:NAME) - Set up to search for the name as we | |
5458 | collapse the stack*/ | |
5459 | popmark = ST.mark_name; | |
5460 | } else { | |
5461 | /* (*CUT) - No name, we cut here.*/ | |
e2e6a0f1 YO |
5462 | if (ST.mark_loc > startpoint) |
5463 | reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1); | |
5d458dd8 YO |
5464 | /* but we set sv_commit to latest mark_name if there |
5465 | is one so they can test to see how things lead to this | |
5466 | cut */ | |
5467 | if (mark_state) | |
5468 | sv_commit=mark_state->u.mark.mark_name; | |
5469 | } | |
e2e6a0f1 YO |
5470 | no_final = 1; |
5471 | sayNO; | |
5472 | /* NOTREACHED */ | |
5473 | #undef ST | |
32e6a07c YO |
5474 | case FOLDCHAR: |
5475 | n = ARG(scan); | |
f2ed9b32 | 5476 | if ( n == (U32)what_len_TRICKYFOLD(locinput,utf8_target,ln) ) { |
e64b1bd1 | 5477 | locinput += ln; |
f2ed9b32 | 5478 | } else if ( 0xDF == n && !utf8_target && !UTF_PATTERN ) { |
e64b1bd1 YO |
5479 | sayNO; |
5480 | } else { | |
5481 | U8 folded[UTF8_MAXBYTES_CASE+1]; | |
5482 | STRLEN foldlen; | |
5483 | const char * const l = locinput; | |
5484 | char *e = PL_regeol; | |
5485 | to_uni_fold(n, folded, &foldlen); | |
5486 | ||
4c1b470c | 5487 | if (! foldEQ_utf8((const char*) folded, 0, foldlen, 1, |
f2ed9b32 | 5488 | l, &e, 0, utf8_target)) { |
32e6a07c | 5489 | sayNO; |
e64b1bd1 YO |
5490 | } |
5491 | locinput = e; | |
32e6a07c YO |
5492 | } |
5493 | nextchr = UCHARAT(locinput); | |
5494 | break; | |
e1d1eefb | 5495 | case LNBREAK: |
f2ed9b32 | 5496 | if ((n=is_LNBREAK(locinput,utf8_target))) { |
e1d1eefb YO |
5497 | locinput += n; |
5498 | nextchr = UCHARAT(locinput); | |
5499 | } else | |
5500 | sayNO; | |
5501 | break; | |
5502 | ||
5503 | #define CASE_CLASS(nAmE) \ | |
5504 | case nAmE: \ | |
f2ed9b32 | 5505 | if ((n=is_##nAmE(locinput,utf8_target))) { \ |
e1d1eefb YO |
5506 | locinput += n; \ |
5507 | nextchr = UCHARAT(locinput); \ | |
5508 | } else \ | |
5509 | sayNO; \ | |
5510 | break; \ | |
5511 | case N##nAmE: \ | |
f2ed9b32 | 5512 | if ((n=is_##nAmE(locinput,utf8_target))) { \ |
e1d1eefb YO |
5513 | sayNO; \ |
5514 | } else { \ | |
5515 | locinput += UTF8SKIP(locinput); \ | |
5516 | nextchr = UCHARAT(locinput); \ | |
5517 | } \ | |
5518 | break | |
5519 | ||
5520 | CASE_CLASS(VERTWS); | |
5521 | CASE_CLASS(HORIZWS); | |
5522 | #undef CASE_CLASS | |
5523 | ||
a0d0e21e | 5524 | default: |
b900a521 | 5525 | PerlIO_printf(Perl_error_log, "%"UVxf" %d\n", |
d7d93a81 | 5526 | PTR2UV(scan), OP(scan)); |
cea2e8a9 | 5527 | Perl_croak(aTHX_ "regexp memory corruption"); |
5d458dd8 YO |
5528 | |
5529 | } /* end switch */ | |
95b24440 | 5530 | |
5d458dd8 YO |
5531 | /* switch break jumps here */ |
5532 | scan = next; /* prepare to execute the next op and ... */ | |
5533 | continue; /* ... jump back to the top, reusing st */ | |
95b24440 DM |
5534 | /* NOTREACHED */ |
5535 | ||
40a82448 DM |
5536 | push_yes_state: |
5537 | /* push a state that backtracks on success */ | |
5538 | st->u.yes.prev_yes_state = yes_state; | |
5539 | yes_state = st; | |
5540 | /* FALL THROUGH */ | |
5541 | push_state: | |
5542 | /* push a new regex state, then continue at scan */ | |
5543 | { | |
5544 | regmatch_state *newst; | |
5545 | ||
24b23f37 YO |
5546 | DEBUG_STACK_r({ |
5547 | regmatch_state *cur = st; | |
5548 | regmatch_state *curyes = yes_state; | |
5549 | int curd = depth; | |
5550 | regmatch_slab *slab = PL_regmatch_slab; | |
5551 | for (;curd > -1;cur--,curd--) { | |
5552 | if (cur < SLAB_FIRST(slab)) { | |
5553 | slab = slab->prev; | |
5554 | cur = SLAB_LAST(slab); | |
5555 | } | |
5556 | PerlIO_printf(Perl_error_log, "%*s#%-3d %-10s %s\n", | |
5557 | REPORT_CODE_OFF + 2 + depth * 2,"", | |
13d6edb4 | 5558 | curd, PL_reg_name[cur->resume_state], |
24b23f37 YO |
5559 | (curyes == cur) ? "yes" : "" |
5560 | ); | |
5561 | if (curyes == cur) | |
5562 | curyes = cur->u.yes.prev_yes_state; | |
5563 | } | |
5564 | } else | |
5565 | DEBUG_STATE_pp("push") | |
5566 | ); | |
40a82448 | 5567 | depth++; |
40a82448 DM |
5568 | st->locinput = locinput; |
5569 | newst = st+1; | |
5570 | if (newst > SLAB_LAST(PL_regmatch_slab)) | |
5571 | newst = S_push_slab(aTHX); | |
5572 | PL_regmatch_state = newst; | |
786e8c11 | 5573 | |
40a82448 DM |
5574 | locinput = PL_reginput; |
5575 | nextchr = UCHARAT(locinput); | |
5576 | st = newst; | |
5577 | continue; | |
5578 | /* NOTREACHED */ | |
5579 | } | |
a0d0e21e | 5580 | } |
a687059c | 5581 | |
a0d0e21e LW |
5582 | /* |
5583 | * We get here only if there's trouble -- normally "case END" is | |
5584 | * the terminating point. | |
5585 | */ | |
cea2e8a9 | 5586 | Perl_croak(aTHX_ "corrupted regexp pointers"); |
a0d0e21e | 5587 | /*NOTREACHED*/ |
4633a7c4 LW |
5588 | sayNO; |
5589 | ||
262b90c4 | 5590 | yes: |
77cb431f DM |
5591 | if (yes_state) { |
5592 | /* we have successfully completed a subexpression, but we must now | |
5593 | * pop to the state marked by yes_state and continue from there */ | |
77cb431f | 5594 | assert(st != yes_state); |
5bc10b2c DM |
5595 | #ifdef DEBUGGING |
5596 | while (st != yes_state) { | |
5597 | st--; | |
5598 | if (st < SLAB_FIRST(PL_regmatch_slab)) { | |
5599 | PL_regmatch_slab = PL_regmatch_slab->prev; | |
5600 | st = SLAB_LAST(PL_regmatch_slab); | |
5601 | } | |
e2e6a0f1 | 5602 | DEBUG_STATE_r({ |
54612592 YO |
5603 | if (no_final) { |
5604 | DEBUG_STATE_pp("pop (no final)"); | |
5605 | } else { | |
5606 | DEBUG_STATE_pp("pop (yes)"); | |
5607 | } | |
e2e6a0f1 | 5608 | }); |
5bc10b2c DM |
5609 | depth--; |
5610 | } | |
5611 | #else | |
77cb431f DM |
5612 | while (yes_state < SLAB_FIRST(PL_regmatch_slab) |
5613 | || yes_state > SLAB_LAST(PL_regmatch_slab)) | |
5614 | { | |
5615 | /* not in this slab, pop slab */ | |
5616 | depth -= (st - SLAB_FIRST(PL_regmatch_slab) + 1); | |
5617 | PL_regmatch_slab = PL_regmatch_slab->prev; | |
5618 | st = SLAB_LAST(PL_regmatch_slab); | |
5619 | } | |
5620 | depth -= (st - yes_state); | |
5bc10b2c | 5621 | #endif |
77cb431f DM |
5622 | st = yes_state; |
5623 | yes_state = st->u.yes.prev_yes_state; | |
5624 | PL_regmatch_state = st; | |
24b23f37 | 5625 | |
5d458dd8 YO |
5626 | if (no_final) { |
5627 | locinput= st->locinput; | |
5628 | nextchr = UCHARAT(locinput); | |
5629 | } | |
54612592 | 5630 | state_num = st->resume_state + no_final; |
24d3c4a9 | 5631 | goto reenter_switch; |
77cb431f DM |
5632 | } |
5633 | ||
a3621e74 | 5634 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n", |
e4584336 | 5635 | PL_colors[4], PL_colors[5])); |
02db2b7b | 5636 | |
19b95bf0 DM |
5637 | if (PL_reg_eval_set) { |
5638 | /* each successfully executed (?{...}) block does the equivalent of | |
5639 | * local $^R = do {...} | |
5640 | * When popping the save stack, all these locals would be undone; | |
5641 | * bypass this by setting the outermost saved $^R to the latest | |
5642 | * value */ | |
5643 | if (oreplsv != GvSV(PL_replgv)) | |
5644 | sv_setsv(oreplsv, GvSV(PL_replgv)); | |
5645 | } | |
95b24440 | 5646 | result = 1; |
aa283a38 | 5647 | goto final_exit; |
4633a7c4 LW |
5648 | |
5649 | no: | |
a3621e74 | 5650 | DEBUG_EXECUTE_r( |
7821416a | 5651 | PerlIO_printf(Perl_debug_log, |
786e8c11 | 5652 | "%*s %sfailed...%s\n", |
5bc10b2c | 5653 | REPORT_CODE_OFF+depth*2, "", |
786e8c11 | 5654 | PL_colors[4], PL_colors[5]) |
7821416a | 5655 | ); |
aa283a38 | 5656 | |
262b90c4 | 5657 | no_silent: |
54612592 YO |
5658 | if (no_final) { |
5659 | if (yes_state) { | |
5660 | goto yes; | |
5661 | } else { | |
5662 | goto final_exit; | |
5663 | } | |
5664 | } | |
aa283a38 DM |
5665 | if (depth) { |
5666 | /* there's a previous state to backtrack to */ | |
40a82448 DM |
5667 | st--; |
5668 | if (st < SLAB_FIRST(PL_regmatch_slab)) { | |
5669 | PL_regmatch_slab = PL_regmatch_slab->prev; | |
5670 | st = SLAB_LAST(PL_regmatch_slab); | |
5671 | } | |
5672 | PL_regmatch_state = st; | |
40a82448 DM |
5673 | locinput= st->locinput; |
5674 | nextchr = UCHARAT(locinput); | |
5675 | ||
5bc10b2c DM |
5676 | DEBUG_STATE_pp("pop"); |
5677 | depth--; | |
262b90c4 DM |
5678 | if (yes_state == st) |
5679 | yes_state = st->u.yes.prev_yes_state; | |
5bc10b2c | 5680 | |
24d3c4a9 DM |
5681 | state_num = st->resume_state + 1; /* failure = success + 1 */ |
5682 | goto reenter_switch; | |
95b24440 | 5683 | } |
24d3c4a9 | 5684 | result = 0; |
aa283a38 | 5685 | |
262b90c4 | 5686 | final_exit: |
bbe252da | 5687 | if (rex->intflags & PREGf_VERBARG_SEEN) { |
5d458dd8 YO |
5688 | SV *sv_err = get_sv("REGERROR", 1); |
5689 | SV *sv_mrk = get_sv("REGMARK", 1); | |
5690 | if (result) { | |
e2e6a0f1 | 5691 | sv_commit = &PL_sv_no; |
5d458dd8 YO |
5692 | if (!sv_yes_mark) |
5693 | sv_yes_mark = &PL_sv_yes; | |
5694 | } else { | |
5695 | if (!sv_commit) | |
5696 | sv_commit = &PL_sv_yes; | |
5697 | sv_yes_mark = &PL_sv_no; | |
5698 | } | |
5699 | sv_setsv(sv_err, sv_commit); | |
5700 | sv_setsv(sv_mrk, sv_yes_mark); | |
e2e6a0f1 | 5701 | } |
19b95bf0 | 5702 | |
2f554ef7 DM |
5703 | /* clean up; in particular, free all slabs above current one */ |
5704 | LEAVE_SCOPE(oldsave); | |
5d9a96ca | 5705 | |
95b24440 | 5706 | return result; |
a687059c LW |
5707 | } |
5708 | ||
5709 | /* | |
5710 | - regrepeat - repeatedly match something simple, report how many | |
5711 | */ | |
5712 | /* | |
5713 | * [This routine now assumes that it will only match on things of length 1. | |
5714 | * That was true before, but now we assume scan - reginput is the count, | |
a0ed51b3 | 5715 | * rather than incrementing count on every character. [Er, except utf8.]] |
a687059c | 5716 | */ |
76e3520e | 5717 | STATIC I32 |
e2e6a0f1 | 5718 | S_regrepeat(pTHX_ const regexp *prog, const regnode *p, I32 max, int depth) |
a687059c | 5719 | { |
27da23d5 | 5720 | dVAR; |
a0d0e21e | 5721 | register char *scan; |
a0d0e21e | 5722 | register I32 c; |
3280af22 | 5723 | register char *loceol = PL_regeol; |
a0ed51b3 | 5724 | register I32 hardcount = 0; |
f2ed9b32 | 5725 | register bool utf8_target = PL_reg_match_utf8; |
4f55667c SP |
5726 | #ifndef DEBUGGING |
5727 | PERL_UNUSED_ARG(depth); | |
5728 | #endif | |
a0d0e21e | 5729 | |
7918f24d NC |
5730 | PERL_ARGS_ASSERT_REGREPEAT; |
5731 | ||
3280af22 | 5732 | scan = PL_reginput; |
faf11cac HS |
5733 | if (max == REG_INFTY) |
5734 | max = I32_MAX; | |
5735 | else if (max < loceol - scan) | |
7f596f4c | 5736 | loceol = scan + max; |
a0d0e21e | 5737 | switch (OP(p)) { |
22c35a8c | 5738 | case REG_ANY: |
f2ed9b32 | 5739 | if (utf8_target) { |
ffc61ed2 | 5740 | loceol = PL_regeol; |
1aa99e6b | 5741 | while (scan < loceol && hardcount < max && *scan != '\n') { |
ffc61ed2 JH |
5742 | scan += UTF8SKIP(scan); |
5743 | hardcount++; | |
5744 | } | |
5745 | } else { | |
5746 | while (scan < loceol && *scan != '\n') | |
5747 | scan++; | |
a0ed51b3 LW |
5748 | } |
5749 | break; | |
ffc61ed2 | 5750 | case SANY: |
f2ed9b32 | 5751 | if (utf8_target) { |
def8e4ea | 5752 | loceol = PL_regeol; |
a0804c9e | 5753 | while (scan < loceol && hardcount < max) { |
def8e4ea JH |
5754 | scan += UTF8SKIP(scan); |
5755 | hardcount++; | |
5756 | } | |
5757 | } | |
5758 | else | |
5759 | scan = loceol; | |
a0ed51b3 | 5760 | break; |
f33976b4 DB |
5761 | case CANY: |
5762 | scan = loceol; | |
5763 | break; | |
d4e0b827 KW |
5764 | case EXACTFL: |
5765 | PL_reg_flags |= RF_tainted; | |
5766 | /* FALL THROUGH */ | |
634c83a2 | 5767 | case EXACT: |
d4e0b827 KW |
5768 | case EXACTF: |
5769 | /* To get here, EXACTish nodes must have *byte* length == 1. That means | |
634c83a2 KW |
5770 | * they match only characters in the string that can be expressed as a |
5771 | * single byte. For non-utf8 strings, that means a simple match. For | |
5772 | * utf8 strings, the character matched must be an invariant, or | |
5773 | * downgradable to a single byte. The pattern's utf8ness is | |
5774 | * irrelevant, as it must be a single byte, so either it isn't utf8, or | |
5775 | * if it is it's an invariant */ | |
5776 | ||
090f7165 | 5777 | c = (U8)*STRING(p); |
634c83a2 | 5778 | assert(! UTF_PATTERN || UNI_IS_INVARIANT(c)); |
d4e0b827 | 5779 | |
634c83a2 KW |
5780 | if ((! utf8_target) || UNI_IS_INVARIANT(c)) { |
5781 | ||
5782 | /* Here, the string isn't utf8, or the character in the EXACT | |
5783 | * node is the same in utf8 as not, so can just do equality. | |
5784 | * Each matching char must be 1 byte long */ | |
d4e0b827 KW |
5785 | switch (OP(p)) { |
5786 | case EXACT: | |
5787 | while (scan < loceol && UCHARAT(scan) == c) { | |
5788 | scan++; | |
5789 | } | |
5790 | break; | |
5791 | case EXACTF: | |
5792 | while (scan < loceol && | |
5793 | (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c])) | |
5794 | { | |
5795 | scan++; | |
5796 | } | |
5797 | break; | |
5798 | case EXACTFL: | |
5799 | while (scan < loceol && | |
5800 | (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c])) | |
5801 | { | |
5802 | scan++; | |
5803 | } | |
5804 | break; | |
5805 | default: | |
5806 | Perl_croak(aTHX_ "panic: Unexpected op %u", OP(p)); | |
634c83a2 KW |
5807 | } |
5808 | } | |
5809 | else { | |
5810 | ||
d4e0b827 KW |
5811 | /* Here, the string is utf8, and the pattern char is different |
5812 | * in utf8 than not. */ | |
5813 | ||
5814 | switch (OP(p)) { | |
5815 | case EXACT: | |
5816 | { | |
5817 | /* Fastest to find the two utf8 bytes that represent c, and | |
5818 | * then look for those in sequence in the utf8 string */ | |
5819 | U8 high = UTF8_TWO_BYTE_HI(c); | |
5820 | U8 low = UTF8_TWO_BYTE_LO(c); | |
5821 | loceol = PL_regeol; | |
5822 | ||
5823 | while (hardcount < max | |
5824 | && scan + 1 < loceol | |
5825 | && UCHARAT(scan) == high | |
5826 | && UCHARAT(scan + 1) == low) | |
5827 | { | |
5828 | scan += 2; | |
5829 | hardcount++; | |
5830 | } | |
5831 | } | |
5832 | break; | |
5833 | case EXACTFL: /* Doesn't really make sense, but is best we can | |
5834 | do. The documents warn against mixing locale | |
5835 | and utf8 */ | |
5836 | case EXACTF: | |
5837 | { /* utf8 string, so use utf8 foldEQ */ | |
5838 | char *tmpeol = loceol; | |
5839 | while (hardcount < max | |
5840 | && foldEQ_utf8(scan, &tmpeol, 0, utf8_target, | |
5841 | STRING(p), NULL, 1, UTF_PATTERN)) | |
5842 | { | |
5843 | scan = tmpeol; | |
5844 | tmpeol = loceol; | |
5845 | hardcount++; | |
5846 | } | |
5847 | ||
5848 | /* XXX Note that the above handles properly the German | |
5849 | * sharp ss in the pattern matching ss in the string. But | |
5850 | * it doesn't handle properly cases where the string | |
5851 | * contains say 'LIGATURE ff' and the pattern is 'f+'. | |
5852 | * This would require, say, a new function or revised | |
5853 | * interface to foldEQ_utf8(), in which the maximum number | |
5854 | * of characters to match could be passed and it would | |
5855 | * return how many actually did. This is just one of many | |
5856 | * cases where multi-char folds don't work properly, and so | |
5857 | * the fix is being deferred */ | |
5858 | } | |
5859 | break; | |
5860 | default: | |
5861 | Perl_croak(aTHX_ "panic: Unexpected op %u", OP(p)); | |
634c83a2 KW |
5862 | } |
5863 | } | |
bbce6d69 | 5864 | break; |
a0d0e21e | 5865 | case ANYOF: |
f2ed9b32 | 5866 | if (utf8_target) { |
ffc61ed2 | 5867 | loceol = PL_regeol; |
cfc92286 | 5868 | while (hardcount < max && scan < loceol && |
f2ed9b32 | 5869 | reginclass(prog, p, (U8*)scan, 0, utf8_target)) { |
ffc61ed2 JH |
5870 | scan += UTF8SKIP(scan); |
5871 | hardcount++; | |
5872 | } | |
5873 | } else { | |
32fc9b6a | 5874 | while (scan < loceol && REGINCLASS(prog, p, (U8*)scan)) |
ffc61ed2 JH |
5875 | scan++; |
5876 | } | |
a0d0e21e LW |
5877 | break; |
5878 | case ALNUM: | |
f2ed9b32 | 5879 | if (utf8_target) { |
ffc61ed2 | 5880 | loceol = PL_regeol; |
1a4fad37 | 5881 | LOAD_UTF8_CHARCLASS_ALNUM(); |
1aa99e6b | 5882 | while (hardcount < max && scan < loceol && |
a12cf05f KW |
5883 | swash_fetch(PL_utf8_alnum, (U8*)scan, utf8_target)) |
5884 | { | |
ffc61ed2 JH |
5885 | scan += UTF8SKIP(scan); |
5886 | hardcount++; | |
5887 | } | |
a12cf05f KW |
5888 | } else if (FLAGS(p) & USE_UNI) { |
5889 | while (scan < loceol && isWORDCHAR_L1((U8) *scan)) { | |
5890 | scan++; | |
5891 | } | |
ffc61ed2 | 5892 | } else { |
a12cf05f KW |
5893 | while (scan < loceol && isALNUM((U8) *scan)) { |
5894 | scan++; | |
5895 | } | |
a0ed51b3 LW |
5896 | } |
5897 | break; | |
bbce6d69 | 5898 | case ALNUML: |
3280af22 | 5899 | PL_reg_flags |= RF_tainted; |
f2ed9b32 | 5900 | if (utf8_target) { |
ffc61ed2 | 5901 | loceol = PL_regeol; |
1aa99e6b IH |
5902 | while (hardcount < max && scan < loceol && |
5903 | isALNUM_LC_utf8((U8*)scan)) { | |
ffc61ed2 JH |
5904 | scan += UTF8SKIP(scan); |
5905 | hardcount++; | |
5906 | } | |
5907 | } else { | |
5908 | while (scan < loceol && isALNUM_LC(*scan)) | |
5909 | scan++; | |
a0ed51b3 LW |
5910 | } |
5911 | break; | |
a0d0e21e | 5912 | case NALNUM: |
f2ed9b32 | 5913 | if (utf8_target) { |
ffc61ed2 | 5914 | loceol = PL_regeol; |
1a4fad37 | 5915 | LOAD_UTF8_CHARCLASS_ALNUM(); |
1aa99e6b | 5916 | while (hardcount < max && scan < loceol && |
a12cf05f KW |
5917 | !swash_fetch(PL_utf8_alnum, (U8*)scan, utf8_target)) |
5918 | { | |
ffc61ed2 JH |
5919 | scan += UTF8SKIP(scan); |
5920 | hardcount++; | |
5921 | } | |
a12cf05f KW |
5922 | } else if (FLAGS(p) & USE_UNI) { |
5923 | while (scan < loceol && ! isWORDCHAR_L1((U8) *scan)) { | |
5924 | scan++; | |
5925 | } | |
ffc61ed2 | 5926 | } else { |
a12cf05f KW |
5927 | while (scan < loceol && ! isALNUM((U8) *scan)) { |
5928 | scan++; | |
5929 | } | |
a0ed51b3 LW |
5930 | } |
5931 | break; | |
bbce6d69 | 5932 | case NALNUML: |
3280af22 | 5933 | PL_reg_flags |= RF_tainted; |
f2ed9b32 | 5934 | if (utf8_target) { |
ffc61ed2 | 5935 | loceol = PL_regeol; |
1aa99e6b IH |
5936 | while (hardcount < max && scan < loceol && |
5937 | !isALNUM_LC_utf8((U8*)scan)) { | |
ffc61ed2 JH |
5938 | scan += UTF8SKIP(scan); |
5939 | hardcount++; | |
5940 | } | |
5941 | } else { | |
5942 | while (scan < loceol && !isALNUM_LC(*scan)) | |
5943 | scan++; | |
a0ed51b3 LW |
5944 | } |
5945 | break; | |
a0d0e21e | 5946 | case SPACE: |
f2ed9b32 | 5947 | if (utf8_target) { |
ffc61ed2 | 5948 | loceol = PL_regeol; |
1a4fad37 | 5949 | LOAD_UTF8_CHARCLASS_SPACE(); |
1aa99e6b | 5950 | while (hardcount < max && scan < loceol && |
3568d838 | 5951 | (*scan == ' ' || |
a12cf05f KW |
5952 | swash_fetch(PL_utf8_space,(U8*)scan, utf8_target))) |
5953 | { | |
ffc61ed2 JH |
5954 | scan += UTF8SKIP(scan); |
5955 | hardcount++; | |
5956 | } | |
a12cf05f KW |
5957 | } else if (FLAGS(p) & USE_UNI) { |
5958 | while (scan < loceol && isSPACE_L1((U8) *scan)) { | |
5959 | scan++; | |
5960 | } | |
ffc61ed2 | 5961 | } else { |
a12cf05f KW |
5962 | while (scan < loceol && isSPACE((U8) *scan)) |
5963 | scan++; | |
a0ed51b3 LW |
5964 | } |
5965 | break; | |
bbce6d69 | 5966 | case SPACEL: |
3280af22 | 5967 | PL_reg_flags |= RF_tainted; |
f2ed9b32 | 5968 | if (utf8_target) { |
ffc61ed2 | 5969 | loceol = PL_regeol; |
1aa99e6b | 5970 | while (hardcount < max && scan < loceol && |
ffc61ed2 JH |
5971 | (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
5972 | scan += UTF8SKIP(scan); | |
5973 | hardcount++; | |
5974 | } | |
5975 | } else { | |
5976 | while (scan < loceol && isSPACE_LC(*scan)) | |
5977 | scan++; | |
a0ed51b3 LW |
5978 | } |
5979 | break; | |
a0d0e21e | 5980 | case NSPACE: |
f2ed9b32 | 5981 | if (utf8_target) { |
ffc61ed2 | 5982 | loceol = PL_regeol; |
1a4fad37 | 5983 | LOAD_UTF8_CHARCLASS_SPACE(); |
1aa99e6b | 5984 | while (hardcount < max && scan < loceol && |
3568d838 | 5985 | !(*scan == ' ' || |
a12cf05f KW |
5986 | swash_fetch(PL_utf8_space,(U8*)scan, utf8_target))) |
5987 | { | |
ffc61ed2 JH |
5988 | scan += UTF8SKIP(scan); |
5989 | hardcount++; | |
5990 | } | |
a12cf05f KW |
5991 | } else if (FLAGS(p) & USE_UNI) { |
5992 | while (scan < loceol && ! isSPACE_L1((U8) *scan)) { | |
5993 | scan++; | |
5994 | } | |
ffc61ed2 | 5995 | } else { |
a12cf05f KW |
5996 | while (scan < loceol && ! isSPACE((U8) *scan)) { |
5997 | scan++; | |
5998 | } | |
a0ed51b3 | 5999 | } |
0008a298 | 6000 | break; |
bbce6d69 | 6001 | case NSPACEL: |
3280af22 | 6002 | PL_reg_flags |= RF_tainted; |
f2ed9b32 | 6003 | if (utf8_target) { |
ffc61ed2 | 6004 | loceol = PL_regeol; |
1aa99e6b | 6005 | while (hardcount < max && scan < loceol && |
ffc61ed2 JH |
6006 | !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
6007 | scan += UTF8SKIP(scan); | |
6008 | hardcount++; | |
6009 | } | |
6010 | } else { | |
6011 | while (scan < loceol && !isSPACE_LC(*scan)) | |
6012 | scan++; | |
a0ed51b3 LW |
6013 | } |
6014 | break; | |
a0d0e21e | 6015 | case DIGIT: |
f2ed9b32 | 6016 | if (utf8_target) { |
ffc61ed2 | 6017 | loceol = PL_regeol; |
1a4fad37 | 6018 | LOAD_UTF8_CHARCLASS_DIGIT(); |
1aa99e6b | 6019 | while (hardcount < max && scan < loceol && |
f2ed9b32 | 6020 | swash_fetch(PL_utf8_digit, (U8*)scan, utf8_target)) { |
ffc61ed2 JH |
6021 | scan += UTF8SKIP(scan); |
6022 | hardcount++; | |
6023 | } | |
6024 | } else { | |
6025 | while (scan < loceol && isDIGIT(*scan)) | |
6026 | scan++; | |
a0ed51b3 LW |
6027 | } |
6028 | break; | |
a0d0e21e | 6029 | case NDIGIT: |
f2ed9b32 | 6030 | if (utf8_target) { |
ffc61ed2 | 6031 | loceol = PL_regeol; |
1a4fad37 | 6032 | LOAD_UTF8_CHARCLASS_DIGIT(); |
1aa99e6b | 6033 | while (hardcount < max && scan < loceol && |
f2ed9b32 | 6034 | !swash_fetch(PL_utf8_digit, (U8*)scan, utf8_target)) { |
ffc61ed2 JH |
6035 | scan += UTF8SKIP(scan); |
6036 | hardcount++; | |
6037 | } | |
6038 | } else { | |
6039 | while (scan < loceol && !isDIGIT(*scan)) | |
6040 | scan++; | |
a0ed51b3 | 6041 | } |
e1d1eefb | 6042 | case LNBREAK: |
f2ed9b32 | 6043 | if (utf8_target) { |
e1d1eefb YO |
6044 | loceol = PL_regeol; |
6045 | while (hardcount < max && scan < loceol && (c=is_LNBREAK_utf8(scan))) { | |
6046 | scan += c; | |
6047 | hardcount++; | |
6048 | } | |
6049 | } else { | |
6050 | /* | |
6051 | LNBREAK can match two latin chars, which is ok, | |
6052 | because we have a null terminated string, but we | |
6053 | have to use hardcount in this situation | |
6054 | */ | |
6055 | while (scan < loceol && (c=is_LNBREAK_latin1(scan))) { | |
6056 | scan+=c; | |
6057 | hardcount++; | |
6058 | } | |
6059 | } | |
6060 | break; | |
6061 | case HORIZWS: | |
f2ed9b32 | 6062 | if (utf8_target) { |
e1d1eefb YO |
6063 | loceol = PL_regeol; |
6064 | while (hardcount < max && scan < loceol && (c=is_HORIZWS_utf8(scan))) { | |
6065 | scan += c; | |
6066 | hardcount++; | |
6067 | } | |
6068 | } else { | |
6069 | while (scan < loceol && is_HORIZWS_latin1(scan)) | |
6070 | scan++; | |
6071 | } | |
a0ed51b3 | 6072 | break; |
e1d1eefb | 6073 | case NHORIZWS: |
f2ed9b32 | 6074 | if (utf8_target) { |
e1d1eefb YO |
6075 | loceol = PL_regeol; |
6076 | while (hardcount < max && scan < loceol && !is_HORIZWS_utf8(scan)) { | |
6077 | scan += UTF8SKIP(scan); | |
6078 | hardcount++; | |
6079 | } | |
6080 | } else { | |
6081 | while (scan < loceol && !is_HORIZWS_latin1(scan)) | |
6082 | scan++; | |
6083 | ||
6084 | } | |
6085 | break; | |
6086 | case VERTWS: | |
f2ed9b32 | 6087 | if (utf8_target) { |
e1d1eefb YO |
6088 | loceol = PL_regeol; |
6089 | while (hardcount < max && scan < loceol && (c=is_VERTWS_utf8(scan))) { | |
6090 | scan += c; | |
6091 | hardcount++; | |
6092 | } | |
6093 | } else { | |
6094 | while (scan < loceol && is_VERTWS_latin1(scan)) | |
6095 | scan++; | |
6096 | ||
6097 | } | |
6098 | break; | |
6099 | case NVERTWS: | |
f2ed9b32 | 6100 | if (utf8_target) { |
e1d1eefb YO |
6101 | loceol = PL_regeol; |
6102 | while (hardcount < max && scan < loceol && !is_VERTWS_utf8(scan)) { | |
6103 | scan += UTF8SKIP(scan); | |
6104 | hardcount++; | |
6105 | } | |
6106 | } else { | |
6107 | while (scan < loceol && !is_VERTWS_latin1(scan)) | |
6108 | scan++; | |
6109 | ||
6110 | } | |
6111 | break; | |
6112 | ||
a0d0e21e LW |
6113 | default: /* Called on something of 0 width. */ |
6114 | break; /* So match right here or not at all. */ | |
6115 | } | |
a687059c | 6116 | |
a0ed51b3 LW |
6117 | if (hardcount) |
6118 | c = hardcount; | |
6119 | else | |
6120 | c = scan - PL_reginput; | |
3280af22 | 6121 | PL_reginput = scan; |
a687059c | 6122 | |
a3621e74 | 6123 | DEBUG_r({ |
e68ec53f | 6124 | GET_RE_DEBUG_FLAGS_DECL; |
be8e71aa | 6125 | DEBUG_EXECUTE_r({ |
e68ec53f YO |
6126 | SV * const prop = sv_newmortal(); |
6127 | regprop(prog, prop, p); | |
6128 | PerlIO_printf(Perl_debug_log, | |
be8e71aa | 6129 | "%*s %s can match %"IVdf" times out of %"IVdf"...\n", |
e2e6a0f1 | 6130 | REPORT_CODE_OFF + depth*2, "", SvPVX_const(prop),(IV)c,(IV)max); |
a3621e74 | 6131 | }); |
be8e71aa | 6132 | }); |
9041c2e3 | 6133 | |
a0d0e21e | 6134 | return(c); |
a687059c LW |
6135 | } |
6136 | ||
c277df42 | 6137 | |
be8e71aa | 6138 | #if !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION) |
c277df42 | 6139 | /* |
ffc61ed2 JH |
6140 | - regclass_swash - prepare the utf8 swash |
6141 | */ | |
6142 | ||
6143 | SV * | |
32fc9b6a | 6144 | Perl_regclass_swash(pTHX_ const regexp *prog, register const regnode* node, bool doinit, SV** listsvp, SV **altsvp) |
ffc61ed2 | 6145 | { |
97aff369 | 6146 | dVAR; |
9e55ce06 JH |
6147 | SV *sw = NULL; |
6148 | SV *si = NULL; | |
6149 | SV *alt = NULL; | |
f8fc2ecf YO |
6150 | RXi_GET_DECL(prog,progi); |
6151 | const struct reg_data * const data = prog ? progi->data : NULL; | |
ffc61ed2 | 6152 | |
7918f24d NC |
6153 | PERL_ARGS_ASSERT_REGCLASS_SWASH; |
6154 | ||
4f639d21 | 6155 | if (data && data->count) { |
a3b680e6 | 6156 | const U32 n = ARG(node); |
ffc61ed2 | 6157 | |
4f639d21 | 6158 | if (data->what[n] == 's') { |
ad64d0ec NC |
6159 | SV * const rv = MUTABLE_SV(data->data[n]); |
6160 | AV * const av = MUTABLE_AV(SvRV(rv)); | |
2d03de9c | 6161 | SV **const ary = AvARRAY(av); |
9e55ce06 | 6162 | SV **a, **b; |
9041c2e3 | 6163 | |
711a919c | 6164 | /* See the end of regcomp.c:S_regclass() for |
9e55ce06 JH |
6165 | * documentation of these array elements. */ |
6166 | ||
b11f357e | 6167 | si = *ary; |
fe5bfecd JH |
6168 | a = SvROK(ary[1]) ? &ary[1] : NULL; |
6169 | b = SvTYPE(ary[2]) == SVt_PVAV ? &ary[2] : NULL; | |
b11f357e | 6170 | |
ffc61ed2 JH |
6171 | if (a) |
6172 | sw = *a; | |
6173 | else if (si && doinit) { | |
6174 | sw = swash_init("utf8", "", si, 1, 0); | |
6175 | (void)av_store(av, 1, sw); | |
6176 | } | |
9e55ce06 JH |
6177 | if (b) |
6178 | alt = *b; | |
ffc61ed2 JH |
6179 | } |
6180 | } | |
6181 | ||
9e55ce06 JH |
6182 | if (listsvp) |
6183 | *listsvp = si; | |
6184 | if (altsvp) | |
6185 | *altsvp = alt; | |
ffc61ed2 JH |
6186 | |
6187 | return sw; | |
6188 | } | |
76234dfb | 6189 | #endif |
ffc61ed2 JH |
6190 | |
6191 | /* | |
ba7b4546 | 6192 | - reginclass - determine if a character falls into a character class |
832705d4 | 6193 | |
6698fab5 KW |
6194 | n is the ANYOF regnode |
6195 | p is the target string | |
6196 | lenp is pointer to the maximum number of bytes of how far to go in p | |
6197 | (This is assumed wthout checking to always be at least the current | |
6198 | character's size) | |
6199 | utf8_target tells whether p is in UTF-8. | |
832705d4 | 6200 | |
4b3cda86 KW |
6201 | Returns true if matched; false otherwise. If lenp is not NULL, on return |
6202 | from a successful match, the value it points to will be updated to how many | |
6203 | bytes in p were matched. If there was no match, the value is undefined, | |
6204 | possibly changed from the input. | |
eba1359e | 6205 | |
bbce6d69 | 6206 | */ |
6207 | ||
76e3520e | 6208 | STATIC bool |
f6ad78d8 | 6209 | 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 | 6210 | { |
27da23d5 | 6211 | dVAR; |
a3b680e6 | 6212 | const char flags = ANYOF_FLAGS(n); |
bbce6d69 | 6213 | bool match = FALSE; |
cc07378b | 6214 | UV c = *p; |
f7ab54c6 | 6215 | STRLEN c_len = 0; |
6698fab5 | 6216 | STRLEN maxlen; |
1aa99e6b | 6217 | |
7918f24d NC |
6218 | PERL_ARGS_ASSERT_REGINCLASS; |
6219 | ||
4b3cda86 | 6220 | /* If c is not already the code point, get it */ |
f2ed9b32 | 6221 | if (utf8_target && !UTF8_IS_INVARIANT(c)) { |
f7ab54c6 | 6222 | c = utf8n_to_uvchr(p, UTF8_MAXBYTES, &c_len, |
6182169b KW |
6223 | (UTF8_ALLOW_DEFAULT & UTF8_ALLOW_ANYUV) |
6224 | | UTF8_ALLOW_FFFF | UTF8_CHECK_ONLY); | |
6225 | /* see [perl #37836] for UTF8_ALLOW_ANYUV; [perl #38293] for | |
6226 | * UTF8_ALLOW_FFFF */ | |
f7ab54c6 | 6227 | if (c_len == (STRLEN)-1) |
e8a70c6f | 6228 | Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)"); |
19f67299 | 6229 | } |
a5a291f5 KW |
6230 | else { |
6231 | c_len = 1; | |
6232 | } | |
bbce6d69 | 6233 | |
a5a291f5 KW |
6234 | /* Use passed in max length, or one character if none passed in or less |
6235 | * than one character. And assume will match just one character. This is | |
6236 | * overwritten later if matched more. */ | |
4b3cda86 | 6237 | if (lenp) { |
a5a291f5 KW |
6238 | maxlen = (*lenp > c_len) ? *lenp : c_len; |
6239 | *lenp = c_len; | |
4b3cda86 KW |
6240 | |
6241 | } | |
6242 | else { | |
a5a291f5 | 6243 | maxlen = c_len; |
4b3cda86 KW |
6244 | } |
6245 | ||
7cdde544 KW |
6246 | /* If this character is potentially in the bitmap, check it */ |
6247 | if (c < 256) { | |
ffc61ed2 JH |
6248 | if (ANYOF_BITMAP_TEST(n, c)) |
6249 | match = TRUE; | |
6250 | else if (flags & ANYOF_FOLD) { | |
eb160463 | 6251 | U8 f; |
a0ed51b3 | 6252 | |
ffc61ed2 JH |
6253 | if (flags & ANYOF_LOCALE) { |
6254 | PL_reg_flags |= RF_tainted; | |
6255 | f = PL_fold_locale[c]; | |
6256 | } | |
6257 | else | |
6258 | f = PL_fold[c]; | |
6259 | if (f != c && ANYOF_BITMAP_TEST(n, f)) | |
6260 | match = TRUE; | |
6261 | } | |
6262 | ||
6263 | if (!match && (flags & ANYOF_CLASS)) { | |
a0ed51b3 | 6264 | PL_reg_flags |= RF_tainted; |
ffc61ed2 JH |
6265 | if ( |
6266 | (ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) || | |
6267 | (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) || | |
6268 | (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) || | |
6269 | (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) || | |
6270 | (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) || | |
6271 | (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) || | |
6272 | (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) || | |
6273 | (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) || | |
6274 | (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) || | |
6275 | (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) || | |
6276 | (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII(c)) || | |
6277 | (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII(c)) || | |
6278 | (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) || | |
6279 | (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) || | |
6280 | (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) || | |
6281 | (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) || | |
6282 | (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) || | |
6283 | (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) || | |
6284 | (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) || | |
6285 | (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) || | |
6286 | (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) || | |
6287 | (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) || | |
6288 | (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) || | |
6289 | (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) || | |
6290 | (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) || | |
6291 | (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) || | |
6292 | (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) || | |
6293 | (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) || | |
6294 | (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK(c)) || | |
6295 | (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK(c)) | |
6296 | ) /* How's that for a conditional? */ | |
6297 | { | |
6298 | match = TRUE; | |
6299 | } | |
a0ed51b3 | 6300 | } |
a0ed51b3 LW |
6301 | } |
6302 | ||
7cdde544 KW |
6303 | /* If the bitmap didn't (or couldn't) match, and something outside the |
6304 | * bitmap could match, try that */ | |
6305 | if (! match && utf8_target || (flags & ANYOF_UNICODE)) { | |
e051a21d | 6306 | if (utf8_target && (flags & ANYOF_UNICODE_ALL) && c >= 256) { |
7cdde544 | 6307 | match = TRUE; |
e051a21d KW |
6308 | } |
6309 | else { | |
7cdde544 KW |
6310 | AV *av; |
6311 | SV * const sw = regclass_swash(prog, n, TRUE, 0, (SV**)&av); | |
6312 | ||
6313 | if (sw) { | |
6314 | U8 * utf8_p; | |
6315 | if (utf8_target) { | |
6316 | utf8_p = (U8 *) p; | |
6317 | } else { | |
6318 | STRLEN len = 1; | |
6319 | utf8_p = bytes_to_utf8(p, &len); | |
6320 | } | |
6321 | if (swash_fetch(sw, utf8_p, 1)) | |
6322 | match = TRUE; | |
6323 | else if (flags & ANYOF_FOLD) { | |
6324 | if (!match && lenp && av) { | |
6325 | I32 i; | |
6326 | for (i = 0; i <= av_len(av); i++) { | |
6327 | SV* const sv = *av_fetch(av, i, FALSE); | |
6328 | STRLEN len; | |
6329 | const char * const s = SvPV_const(sv, len); | |
6330 | if (len <= maxlen && memEQ(s, (char*)utf8_p, len)) { | |
6331 | *lenp = len; | |
6332 | match = TRUE; | |
6333 | break; | |
6334 | } | |
6335 | } | |
6336 | } | |
6337 | if (!match) { | |
6338 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1]; | |
6339 | ||
6340 | STRLEN tmplen; | |
6341 | to_utf8_fold(utf8_p, tmpbuf, &tmplen); | |
6342 | if (swash_fetch(sw, tmpbuf, 1)) | |
6343 | match = TRUE; | |
6344 | } | |
6345 | } | |
6346 | ||
6347 | /* If we allocated a string above, free it */ | |
6348 | if (! utf8_target) Safefree(utf8_p); | |
6349 | } | |
6350 | } | |
6351 | } | |
6352 | ||
a0ed51b3 LW |
6353 | return (flags & ANYOF_INVERT) ? !match : match; |
6354 | } | |
161b471a | 6355 | |
dfe13c55 | 6356 | STATIC U8 * |
0ce71af7 | 6357 | S_reghop3(U8 *s, I32 off, const U8* lim) |
9041c2e3 | 6358 | { |
97aff369 | 6359 | dVAR; |
7918f24d NC |
6360 | |
6361 | PERL_ARGS_ASSERT_REGHOP3; | |
6362 | ||
a0ed51b3 | 6363 | if (off >= 0) { |
1aa99e6b | 6364 | while (off-- && s < lim) { |
ffc61ed2 | 6365 | /* XXX could check well-formedness here */ |
a0ed51b3 | 6366 | s += UTF8SKIP(s); |
ffc61ed2 | 6367 | } |
a0ed51b3 LW |
6368 | } |
6369 | else { | |
1de06328 YO |
6370 | while (off++ && s > lim) { |
6371 | s--; | |
6372 | if (UTF8_IS_CONTINUED(*s)) { | |
6373 | while (s > lim && UTF8_IS_CONTINUATION(*s)) | |
6374 | s--; | |
a0ed51b3 | 6375 | } |
1de06328 | 6376 | /* XXX could check well-formedness here */ |
a0ed51b3 LW |
6377 | } |
6378 | } | |
6379 | return s; | |
6380 | } | |
161b471a | 6381 | |
f9f4320a YO |
6382 | #ifdef XXX_dmq |
6383 | /* there are a bunch of places where we use two reghop3's that should | |
6384 | be replaced with this routine. but since thats not done yet | |
6385 | we ifdef it out - dmq | |
6386 | */ | |
dfe13c55 | 6387 | STATIC U8 * |
1de06328 YO |
6388 | S_reghop4(U8 *s, I32 off, const U8* llim, const U8* rlim) |
6389 | { | |
6390 | dVAR; | |
7918f24d NC |
6391 | |
6392 | PERL_ARGS_ASSERT_REGHOP4; | |
6393 | ||
1de06328 YO |
6394 | if (off >= 0) { |
6395 | while (off-- && s < rlim) { | |
6396 | /* XXX could check well-formedness here */ | |
6397 | s += UTF8SKIP(s); | |
6398 | } | |
6399 | } | |
6400 | else { | |
6401 | while (off++ && s > llim) { | |
6402 | s--; | |
6403 | if (UTF8_IS_CONTINUED(*s)) { | |
6404 | while (s > llim && UTF8_IS_CONTINUATION(*s)) | |
6405 | s--; | |
6406 | } | |
6407 | /* XXX could check well-formedness here */ | |
6408 | } | |
6409 | } | |
6410 | return s; | |
6411 | } | |
f9f4320a | 6412 | #endif |
1de06328 YO |
6413 | |
6414 | STATIC U8 * | |
0ce71af7 | 6415 | S_reghopmaybe3(U8* s, I32 off, const U8* lim) |
a0ed51b3 | 6416 | { |
97aff369 | 6417 | dVAR; |
7918f24d NC |
6418 | |
6419 | PERL_ARGS_ASSERT_REGHOPMAYBE3; | |
6420 | ||
a0ed51b3 | 6421 | if (off >= 0) { |
1aa99e6b | 6422 | while (off-- && s < lim) { |
ffc61ed2 | 6423 | /* XXX could check well-formedness here */ |
a0ed51b3 | 6424 | s += UTF8SKIP(s); |
ffc61ed2 | 6425 | } |
a0ed51b3 | 6426 | if (off >= 0) |
3dab1dad | 6427 | return NULL; |
a0ed51b3 LW |
6428 | } |
6429 | else { | |
1de06328 YO |
6430 | while (off++ && s > lim) { |
6431 | s--; | |
6432 | if (UTF8_IS_CONTINUED(*s)) { | |
6433 | while (s > lim && UTF8_IS_CONTINUATION(*s)) | |
6434 | s--; | |
a0ed51b3 | 6435 | } |
1de06328 | 6436 | /* XXX could check well-formedness here */ |
a0ed51b3 LW |
6437 | } |
6438 | if (off <= 0) | |
3dab1dad | 6439 | return NULL; |
a0ed51b3 LW |
6440 | } |
6441 | return s; | |
6442 | } | |
51371543 | 6443 | |
51371543 | 6444 | static void |
acfe0abc | 6445 | restore_pos(pTHX_ void *arg) |
51371543 | 6446 | { |
97aff369 | 6447 | dVAR; |
097eb12c | 6448 | regexp * const rex = (regexp *)arg; |
51371543 GS |
6449 | if (PL_reg_eval_set) { |
6450 | if (PL_reg_oldsaved) { | |
4f639d21 DM |
6451 | rex->subbeg = PL_reg_oldsaved; |
6452 | rex->sublen = PL_reg_oldsavedlen; | |
f8c7b90f | 6453 | #ifdef PERL_OLD_COPY_ON_WRITE |
4f639d21 | 6454 | rex->saved_copy = PL_nrs; |
ed252734 | 6455 | #endif |
07bc277f | 6456 | RXp_MATCH_COPIED_on(rex); |
51371543 GS |
6457 | } |
6458 | PL_reg_magic->mg_len = PL_reg_oldpos; | |
6459 | PL_reg_eval_set = 0; | |
6460 | PL_curpm = PL_reg_oldcurpm; | |
6461 | } | |
6462 | } | |
33b8afdf JH |
6463 | |
6464 | STATIC void | |
6465 | S_to_utf8_substr(pTHX_ register regexp *prog) | |
6466 | { | |
a1cac82e | 6467 | int i = 1; |
7918f24d NC |
6468 | |
6469 | PERL_ARGS_ASSERT_TO_UTF8_SUBSTR; | |
6470 | ||
a1cac82e NC |
6471 | do { |
6472 | if (prog->substrs->data[i].substr | |
6473 | && !prog->substrs->data[i].utf8_substr) { | |
6474 | SV* const sv = newSVsv(prog->substrs->data[i].substr); | |
6475 | prog->substrs->data[i].utf8_substr = sv; | |
6476 | sv_utf8_upgrade(sv); | |
610460f9 NC |
6477 | if (SvVALID(prog->substrs->data[i].substr)) { |
6478 | const U8 flags = BmFLAGS(prog->substrs->data[i].substr); | |
6479 | if (flags & FBMcf_TAIL) { | |
6480 | /* Trim the trailing \n that fbm_compile added last | |
6481 | time. */ | |
6482 | SvCUR_set(sv, SvCUR(sv) - 1); | |
6483 | /* Whilst this makes the SV technically "invalid" (as its | |
6484 | buffer is no longer followed by "\0") when fbm_compile() | |
6485 | adds the "\n" back, a "\0" is restored. */ | |
6486 | } | |
6487 | fbm_compile(sv, flags); | |
6488 | } | |
a1cac82e NC |
6489 | if (prog->substrs->data[i].substr == prog->check_substr) |
6490 | prog->check_utf8 = sv; | |
6491 | } | |
6492 | } while (i--); | |
33b8afdf JH |
6493 | } |
6494 | ||
6495 | STATIC void | |
6496 | S_to_byte_substr(pTHX_ register regexp *prog) | |
6497 | { | |
97aff369 | 6498 | dVAR; |
a1cac82e | 6499 | int i = 1; |
7918f24d NC |
6500 | |
6501 | PERL_ARGS_ASSERT_TO_BYTE_SUBSTR; | |
6502 | ||
a1cac82e NC |
6503 | do { |
6504 | if (prog->substrs->data[i].utf8_substr | |
6505 | && !prog->substrs->data[i].substr) { | |
6506 | SV* sv = newSVsv(prog->substrs->data[i].utf8_substr); | |
6507 | if (sv_utf8_downgrade(sv, TRUE)) { | |
610460f9 NC |
6508 | if (SvVALID(prog->substrs->data[i].utf8_substr)) { |
6509 | const U8 flags | |
6510 | = BmFLAGS(prog->substrs->data[i].utf8_substr); | |
6511 | if (flags & FBMcf_TAIL) { | |
6512 | /* Trim the trailing \n that fbm_compile added last | |
6513 | time. */ | |
6514 | SvCUR_set(sv, SvCUR(sv) - 1); | |
6515 | } | |
6516 | fbm_compile(sv, flags); | |
6517 | } | |
a1cac82e NC |
6518 | } else { |
6519 | SvREFCNT_dec(sv); | |
6520 | sv = &PL_sv_undef; | |
6521 | } | |
6522 | prog->substrs->data[i].substr = sv; | |
6523 | if (prog->substrs->data[i].utf8_substr == prog->check_utf8) | |
6524 | prog->check_substr = sv; | |
33b8afdf | 6525 | } |
a1cac82e | 6526 | } while (i--); |
33b8afdf | 6527 | } |
66610fdd RGS |
6528 | |
6529 | /* | |
6530 | * Local variables: | |
6531 | * c-indentation-style: bsd | |
6532 | * c-basic-offset: 4 | |
6533 | * indent-tabs-mode: t | |
6534 | * End: | |
6535 | * | |
37442d52 RGS |
6536 | * ex: set ts=8 sts=4 sw=4 noet: |
6537 | */ |