Commit | Line | Data |
---|---|---|
a0d0e21e LW |
1 | /* regexec.c |
2 | */ | |
3 | ||
4 | /* | |
5 | * "One Ring to rule them all, One Ring to find them..." | |
6 | */ | |
7 | ||
61296642 DM |
8 | /* This file contains functions for executing a regular expression. See |
9 | * also regcomp.c which funnily enough, contains functions for compiling | |
166f8a29 | 10 | * a regular expression. |
e4a054ea DM |
11 | * |
12 | * This file is also copied at build time to ext/re/re_exec.c, where | |
13 | * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT. | |
14 | * This causes the main functions to be compiled under new names and with | |
15 | * debugging support added, which makes "use re 'debug'" work. | |
166f8a29 DM |
16 | */ |
17 | ||
a687059c LW |
18 | /* NOTE: this is derived from Henry Spencer's regexp code, and should not |
19 | * confused with the original package (see point 3 below). Thanks, Henry! | |
20 | */ | |
21 | ||
22 | /* Additional note: this code is very heavily munged from Henry's version | |
23 | * in places. In some spots I've traded clarity for efficiency, so don't | |
24 | * blame Henry for some of the lack of readability. | |
25 | */ | |
26 | ||
e50aee73 AD |
27 | /* The names of the functions have been changed from regcomp and |
28 | * regexec to pregcomp and pregexec in order to avoid conflicts | |
29 | * with the POSIX routines of the same names. | |
30 | */ | |
31 | ||
b9d5759e | 32 | #ifdef PERL_EXT_RE_BUILD |
54df2634 | 33 | #include "re_top.h" |
9041c2e3 | 34 | #endif |
56953603 | 35 | |
a687059c | 36 | /* |
e50aee73 | 37 | * pregcomp and pregexec -- regsub and regerror are not used in perl |
a687059c LW |
38 | * |
39 | * Copyright (c) 1986 by University of Toronto. | |
40 | * Written by Henry Spencer. Not derived from licensed software. | |
41 | * | |
42 | * Permission is granted to anyone to use this software for any | |
43 | * purpose on any computer system, and to redistribute it freely, | |
44 | * subject to the following restrictions: | |
45 | * | |
46 | * 1. The author is not responsible for the consequences of use of | |
47 | * this software, no matter how awful, even if they arise | |
48 | * from defects in it. | |
49 | * | |
50 | * 2. The origin of this software must not be misrepresented, either | |
51 | * by explicit claim or by omission. | |
52 | * | |
53 | * 3. Altered versions must be plainly marked as such, and must not | |
54 | * be misrepresented as being the original software. | |
55 | * | |
56 | **** Alterations to Henry's code are... | |
57 | **** | |
4bb101f2 | 58 | **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
b94e2f88 | 59 | **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, by Larry Wall and others |
a687059c | 60 | **** |
9ef589d8 LW |
61 | **** You may distribute under the terms of either the GNU General Public |
62 | **** License or the Artistic License, as specified in the README file. | |
a687059c LW |
63 | * |
64 | * Beware that some of this code is subtly aware of the way operator | |
65 | * precedence is structured in regular expressions. Serious changes in | |
66 | * regular-expression syntax might require a total rethink. | |
67 | */ | |
68 | #include "EXTERN.h" | |
864dbfa3 | 69 | #define PERL_IN_REGEXEC_C |
a687059c | 70 | #include "perl.h" |
0f5d15d6 | 71 | |
54df2634 NC |
72 | #ifdef PERL_IN_XSUB_RE |
73 | # include "re_comp.h" | |
74 | #else | |
75 | # include "regcomp.h" | |
76 | #endif | |
a687059c | 77 | |
c277df42 IZ |
78 | #define RF_tainted 1 /* tainted information used? */ |
79 | #define RF_warned 2 /* warned about big count? */ | |
faec1544 | 80 | |
ab3bbdeb | 81 | #define RF_utf8 8 /* Pattern contains multibyte chars? */ |
a0ed51b3 | 82 | |
eb160463 | 83 | #define UTF ((PL_reg_flags & RF_utf8) != 0) |
ce862d02 IZ |
84 | |
85 | #define RS_init 1 /* eval environment created */ | |
86 | #define RS_set 2 /* replsv value is set */ | |
c277df42 | 87 | |
a687059c LW |
88 | #ifndef STATIC |
89 | #define STATIC static | |
90 | #endif | |
91 | ||
32fc9b6a | 92 | #define REGINCLASS(prog,p,c) (ANYOF_FLAGS(p) ? reginclass(prog,p,c,0,0) : ANYOF_BITMAP_TEST(p,*(c))) |
7d3e948e | 93 | |
c277df42 IZ |
94 | /* |
95 | * Forwards. | |
96 | */ | |
97 | ||
33b8afdf | 98 | #define CHR_SVLEN(sv) (do_utf8 ? sv_len_utf8(sv) : SvCUR(sv)) |
53c4c00c | 99 | #define CHR_DIST(a,b) (PL_reg_match_utf8 ? utf8_distance(a,b) : a - b) |
a0ed51b3 | 100 | |
3dab1dad YO |
101 | #define HOPc(pos,off) \ |
102 | (char *)(PL_reg_match_utf8 \ | |
52657f30 | 103 | ? reghop3((U8*)pos, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)) \ |
3dab1dad YO |
104 | : (U8*)(pos + off)) |
105 | #define HOPBACKc(pos, off) \ | |
07be1b83 YO |
106 | (char*)(PL_reg_match_utf8\ |
107 | ? reghopmaybe3((U8*)pos, -off, (U8*)PL_bostr) \ | |
108 | : (pos - off >= PL_bostr) \ | |
8e11feef | 109 | ? (U8*)pos - off \ |
3dab1dad | 110 | : NULL) |
efb30f32 | 111 | |
e7409c1b | 112 | #define HOP3(pos,off,lim) (PL_reg_match_utf8 ? reghop3((U8*)(pos), off, (U8*)(lim)) : (U8*)(pos + off)) |
1aa99e6b | 113 | #define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim)) |
1aa99e6b | 114 | |
1a4fad37 AL |
115 | #define LOAD_UTF8_CHARCLASS(class,str) STMT_START { \ |
116 | if (!CAT2(PL_utf8_,class)) { bool ok; ENTER; save_re_context(); ok=CAT2(is_utf8_,class)((const U8*)str); assert(ok); LEAVE; } } STMT_END | |
117 | #define LOAD_UTF8_CHARCLASS_ALNUM() LOAD_UTF8_CHARCLASS(alnum,"a") | |
118 | #define LOAD_UTF8_CHARCLASS_DIGIT() LOAD_UTF8_CHARCLASS(digit,"0") | |
119 | #define LOAD_UTF8_CHARCLASS_SPACE() LOAD_UTF8_CHARCLASS(space," ") | |
120 | #define LOAD_UTF8_CHARCLASS_MARK() LOAD_UTF8_CHARCLASS(mark, "\xcd\x86") | |
51371543 | 121 | |
3dab1dad YO |
122 | /* TODO: Combine JUMPABLE and HAS_TEXT to cache OP(rn) */ |
123 | ||
5f80c4cf | 124 | /* for use after a quantifier and before an EXACT-like node -- japhy */ |
e2d8ce26 JP |
125 | #define JUMPABLE(rn) ( \ |
126 | OP(rn) == OPEN || OP(rn) == CLOSE || OP(rn) == EVAL || \ | |
cca55fe3 JP |
127 | OP(rn) == SUSPEND || OP(rn) == IFMATCH || \ |
128 | OP(rn) == PLUS || OP(rn) == MINMOD || \ | |
3dab1dad | 129 | (PL_regkind[OP(rn)] == CURLY && ARG1(rn) > 0) \ |
e2d8ce26 JP |
130 | ) |
131 | ||
cca55fe3 | 132 | #define HAS_TEXT(rn) ( \ |
3dab1dad | 133 | PL_regkind[OP(rn)] == EXACT || PL_regkind[OP(rn)] == REF \ |
cca55fe3 | 134 | ) |
e2d8ce26 | 135 | |
a84d97b6 HS |
136 | /* |
137 | Search for mandatory following text node; for lookahead, the text must | |
138 | follow but for lookbehind (rn->flags != 0) we skip to the next step. | |
139 | */ | |
cca55fe3 | 140 | #define FIND_NEXT_IMPT(rn) STMT_START { \ |
3dab1dad YO |
141 | while (JUMPABLE(rn)) { \ |
142 | const OPCODE type = OP(rn); \ | |
143 | if (type == SUSPEND || PL_regkind[type] == CURLY) \ | |
e2d8ce26 | 144 | rn = NEXTOPER(NEXTOPER(rn)); \ |
3dab1dad | 145 | else if (type == PLUS) \ |
cca55fe3 | 146 | rn = NEXTOPER(rn); \ |
3dab1dad | 147 | else if (type == IFMATCH) \ |
a84d97b6 | 148 | rn = (rn->flags == 0) ? NEXTOPER(NEXTOPER(rn)) : rn + ARG(rn); \ |
e2d8ce26 | 149 | else rn += NEXT_OFF(rn); \ |
3dab1dad | 150 | } \ |
5f80c4cf | 151 | } STMT_END |
74750237 | 152 | |
c476f425 | 153 | |
acfe0abc | 154 | static void restore_pos(pTHX_ void *arg); |
51371543 | 155 | |
76e3520e | 156 | STATIC CHECKPOINT |
cea2e8a9 | 157 | S_regcppush(pTHX_ I32 parenfloor) |
a0d0e21e | 158 | { |
97aff369 | 159 | dVAR; |
a3b680e6 | 160 | const int retval = PL_savestack_ix; |
b1ce53c5 | 161 | #define REGCP_PAREN_ELEMS 4 |
a3b680e6 | 162 | const int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS; |
a0d0e21e | 163 | int p; |
40a82448 | 164 | GET_RE_DEBUG_FLAGS_DECL; |
a0d0e21e | 165 | |
e49a9654 IH |
166 | if (paren_elems_to_push < 0) |
167 | Perl_croak(aTHX_ "panic: paren_elems_to_push < 0"); | |
168 | ||
6bda09f9 | 169 | #define REGCP_OTHER_ELEMS 8 |
4b3c1a47 | 170 | SSGROW(paren_elems_to_push + REGCP_OTHER_ELEMS); |
7f69552c | 171 | |
3280af22 | 172 | for (p = PL_regsize; p > parenfloor; p--) { |
b1ce53c5 | 173 | /* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */ |
cf93c79d IZ |
174 | SSPUSHINT(PL_regendp[p]); |
175 | SSPUSHINT(PL_regstartp[p]); | |
3280af22 | 176 | SSPUSHPTR(PL_reg_start_tmp[p]); |
a0d0e21e | 177 | SSPUSHINT(p); |
40a82448 DM |
178 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
179 | " saving \\%"UVuf" %"IVdf"(%"IVdf")..%"IVdf"\n", | |
180 | (UV)p, (IV)PL_regstartp[p], | |
181 | (IV)(PL_reg_start_tmp[p] - PL_bostr), | |
182 | (IV)PL_regendp[p] | |
183 | )); | |
a0d0e21e | 184 | } |
b1ce53c5 | 185 | /* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */ |
6bda09f9 YO |
186 | SSPUSHPTR(PL_regstartp); |
187 | SSPUSHPTR(PL_regendp); | |
3280af22 NIS |
188 | SSPUSHINT(PL_regsize); |
189 | SSPUSHINT(*PL_reglastparen); | |
a01268b5 | 190 | SSPUSHINT(*PL_reglastcloseparen); |
3280af22 | 191 | SSPUSHPTR(PL_reginput); |
41123dfd JH |
192 | #define REGCP_FRAME_ELEMS 2 |
193 | /* REGCP_FRAME_ELEMS are part of the REGCP_OTHER_ELEMS and | |
194 | * are needed for the regexp context stack bookkeeping. */ | |
195 | SSPUSHINT(paren_elems_to_push + REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS); | |
b1ce53c5 | 196 | SSPUSHINT(SAVEt_REGCONTEXT); /* Magic cookie. */ |
41123dfd | 197 | |
a0d0e21e LW |
198 | return retval; |
199 | } | |
200 | ||
c277df42 | 201 | /* These are needed since we do not localize EVAL nodes: */ |
ab3bbdeb YO |
202 | #define REGCP_SET(cp) \ |
203 | DEBUG_STATE_r( \ | |
ab3bbdeb | 204 | PerlIO_printf(Perl_debug_log, \ |
e4f74956 | 205 | " Setting an EVAL scope, savestack=%"IVdf"\n", \ |
ab3bbdeb YO |
206 | (IV)PL_savestack_ix)); \ |
207 | cp = PL_savestack_ix | |
c3464db5 | 208 | |
ab3bbdeb | 209 | #define REGCP_UNWIND(cp) \ |
e4f74956 | 210 | DEBUG_STATE_r( \ |
ab3bbdeb | 211 | if (cp != PL_savestack_ix) \ |
e4f74956 YO |
212 | PerlIO_printf(Perl_debug_log, \ |
213 | " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \ | |
ab3bbdeb YO |
214 | (IV)(cp), (IV)PL_savestack_ix)); \ |
215 | regcpblow(cp) | |
c277df42 | 216 | |
76e3520e | 217 | STATIC char * |
097eb12c | 218 | S_regcppop(pTHX_ const regexp *rex) |
a0d0e21e | 219 | { |
97aff369 | 220 | dVAR; |
3b6647e0 | 221 | U32 i; |
a0d0e21e | 222 | char *input; |
b1ce53c5 | 223 | |
a3621e74 YO |
224 | GET_RE_DEBUG_FLAGS_DECL; |
225 | ||
b1ce53c5 | 226 | /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */ |
a0d0e21e | 227 | i = SSPOPINT; |
b1ce53c5 JH |
228 | assert(i == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */ |
229 | i = SSPOPINT; /* Parentheses elements to pop. */ | |
a0d0e21e | 230 | input = (char *) SSPOPPTR; |
a01268b5 | 231 | *PL_reglastcloseparen = SSPOPINT; |
3280af22 NIS |
232 | *PL_reglastparen = SSPOPINT; |
233 | PL_regsize = SSPOPINT; | |
6bda09f9 YO |
234 | PL_regendp=(I32 *) SSPOPPTR; |
235 | PL_regstartp=(I32 *) SSPOPPTR; | |
b1ce53c5 | 236 | |
6bda09f9 | 237 | |
b1ce53c5 | 238 | /* Now restore the parentheses context. */ |
41123dfd JH |
239 | for (i -= (REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS); |
240 | i > 0; i -= REGCP_PAREN_ELEMS) { | |
1df70142 | 241 | I32 tmps; |
097eb12c | 242 | U32 paren = (U32)SSPOPINT; |
3280af22 | 243 | PL_reg_start_tmp[paren] = (char *) SSPOPPTR; |
cf93c79d IZ |
244 | PL_regstartp[paren] = SSPOPINT; |
245 | tmps = SSPOPINT; | |
3280af22 NIS |
246 | if (paren <= *PL_reglastparen) |
247 | PL_regendp[paren] = tmps; | |
a3621e74 | 248 | DEBUG_EXECUTE_r( |
c3464db5 | 249 | PerlIO_printf(Perl_debug_log, |
b900a521 | 250 | " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n", |
9041c2e3 | 251 | (UV)paren, (IV)PL_regstartp[paren], |
b900a521 | 252 | (IV)(PL_reg_start_tmp[paren] - PL_bostr), |
9041c2e3 | 253 | (IV)PL_regendp[paren], |
3280af22 | 254 | (paren > *PL_reglastparen ? "(no)" : "")); |
c277df42 | 255 | ); |
a0d0e21e | 256 | } |
a3621e74 | 257 | DEBUG_EXECUTE_r( |
bb7a0f54 | 258 | if (*PL_reglastparen + 1 <= rex->nparens) { |
c3464db5 | 259 | PerlIO_printf(Perl_debug_log, |
faccc32b | 260 | " restoring \\%"IVdf"..\\%"IVdf" to undef\n", |
4f639d21 | 261 | (IV)(*PL_reglastparen + 1), (IV)rex->nparens); |
c277df42 IZ |
262 | } |
263 | ); | |
daf18116 | 264 | #if 1 |
dafc8851 JH |
265 | /* It would seem that the similar code in regtry() |
266 | * already takes care of this, and in fact it is in | |
267 | * a better location to since this code can #if 0-ed out | |
268 | * but the code in regtry() is needed or otherwise tests | |
269 | * requiring null fields (pat.t#187 and split.t#{13,14} | |
daf18116 JH |
270 | * (as of patchlevel 7877) will fail. Then again, |
271 | * this code seems to be necessary or otherwise | |
272 | * building DynaLoader will fail: | |
273 | * "Error: '*' not in typemap in DynaLoader.xs, line 164" | |
274 | * --jhi */ | |
3b6647e0 | 275 | for (i = *PL_reglastparen + 1; i <= rex->nparens; i++) { |
097eb12c AL |
276 | if (i > PL_regsize) |
277 | PL_regstartp[i] = -1; | |
278 | PL_regendp[i] = -1; | |
a0d0e21e | 279 | } |
dafc8851 | 280 | #endif |
a0d0e21e LW |
281 | return input; |
282 | } | |
283 | ||
02db2b7b | 284 | #define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */ |
a0d0e21e | 285 | |
a687059c | 286 | /* |
e50aee73 | 287 | * pregexec and friends |
a687059c LW |
288 | */ |
289 | ||
76234dfb | 290 | #ifndef PERL_IN_XSUB_RE |
a687059c | 291 | /* |
c277df42 | 292 | - pregexec - match a regexp against a string |
a687059c | 293 | */ |
c277df42 | 294 | I32 |
864dbfa3 | 295 | Perl_pregexec(pTHX_ register regexp *prog, char *stringarg, register char *strend, |
c3464db5 | 296 | char *strbeg, I32 minend, SV *screamer, U32 nosave) |
c277df42 IZ |
297 | /* strend: pointer to null at end of string */ |
298 | /* strbeg: real beginning of string */ | |
299 | /* minend: end of match must be >=minend after stringarg. */ | |
300 | /* nosave: For optimizations. */ | |
301 | { | |
302 | return | |
9041c2e3 | 303 | regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL, |
c277df42 IZ |
304 | nosave ? 0 : REXEC_COPY_STR); |
305 | } | |
76234dfb | 306 | #endif |
22e551b9 | 307 | |
9041c2e3 | 308 | /* |
cad2e5aa JH |
309 | * Need to implement the following flags for reg_anch: |
310 | * | |
311 | * USE_INTUIT_NOML - Useful to call re_intuit_start() first | |
312 | * USE_INTUIT_ML | |
313 | * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer | |
314 | * INTUIT_AUTORITATIVE_ML | |
315 | * INTUIT_ONCE_NOML - Intuit can match in one location only. | |
316 | * INTUIT_ONCE_ML | |
317 | * | |
318 | * Another flag for this function: SECOND_TIME (so that float substrs | |
319 | * with giant delta may be not rechecked). | |
320 | */ | |
321 | ||
322 | /* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */ | |
323 | ||
3f7c398e | 324 | /* If SCREAM, then SvPVX_const(sv) should be compatible with strpos and strend. |
cad2e5aa JH |
325 | Otherwise, only SvCUR(sv) is used to get strbeg. */ |
326 | ||
327 | /* XXXX We assume that strpos is strbeg unless sv. */ | |
328 | ||
6eb5f6b9 JH |
329 | /* XXXX Some places assume that there is a fixed substring. |
330 | An update may be needed if optimizer marks as "INTUITable" | |
331 | RExen without fixed substrings. Similarly, it is assumed that | |
332 | lengths of all the strings are no more than minlen, thus they | |
333 | cannot come from lookahead. | |
40d049e4 YO |
334 | (Or minlen should take into account lookahead.) |
335 | NOTE: Some of this comment is not correct. minlen does now take account | |
336 | of lookahead/behind. Further research is required. -- demerphq | |
337 | ||
338 | */ | |
6eb5f6b9 | 339 | |
2c2d71f5 JH |
340 | /* A failure to find a constant substring means that there is no need to make |
341 | an expensive call to REx engine, thus we celebrate a failure. Similarly, | |
342 | finding a substring too deep into the string means that less calls to | |
30944b6d IZ |
343 | regtry() should be needed. |
344 | ||
345 | REx compiler's optimizer found 4 possible hints: | |
346 | a) Anchored substring; | |
347 | b) Fixed substring; | |
348 | c) Whether we are anchored (beginning-of-line or \G); | |
349 | d) First node (of those at offset 0) which may distingush positions; | |
6eb5f6b9 | 350 | We use a)b)d) and multiline-part of c), and try to find a position in the |
30944b6d IZ |
351 | string which does not contradict any of them. |
352 | */ | |
2c2d71f5 | 353 | |
6eb5f6b9 JH |
354 | /* Most of decisions we do here should have been done at compile time. |
355 | The nodes of the REx which we used for the search should have been | |
356 | deleted from the finite automaton. */ | |
357 | ||
cad2e5aa JH |
358 | char * |
359 | Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, | |
360 | char *strend, U32 flags, re_scream_pos_data *data) | |
361 | { | |
97aff369 | 362 | dVAR; |
b7953727 | 363 | register I32 start_shift = 0; |
cad2e5aa | 364 | /* Should be nonnegative! */ |
b7953727 | 365 | register I32 end_shift = 0; |
2c2d71f5 JH |
366 | register char *s; |
367 | register SV *check; | |
a1933d95 | 368 | char *strbeg; |
cad2e5aa | 369 | char *t; |
1de06328 | 370 | const bool do_utf8 = (sv && SvUTF8(sv)) ? 1 : 0; /* if no sv we have to assume bytes */ |
cad2e5aa | 371 | I32 ml_anch; |
bd61b366 SS |
372 | register char *other_last = NULL; /* other substr checked before this */ |
373 | char *check_at = NULL; /* check substr found at this pos */ | |
bbe252da | 374 | const I32 multiline = prog->extflags & RXf_PMf_MULTILINE; |
f8fc2ecf | 375 | RXi_GET_DECL(prog,progi); |
30944b6d | 376 | #ifdef DEBUGGING |
890ce7af | 377 | const char * const i_strpos = strpos; |
30944b6d | 378 | #endif |
a3621e74 YO |
379 | |
380 | GET_RE_DEBUG_FLAGS_DECL; | |
381 | ||
a30b2f1f | 382 | RX_MATCH_UTF8_set(prog,do_utf8); |
cad2e5aa | 383 | |
bbe252da | 384 | if (prog->extflags & RXf_UTF8) { |
b8d68ded JH |
385 | PL_reg_flags |= RF_utf8; |
386 | } | |
ab3bbdeb YO |
387 | DEBUG_EXECUTE_r( |
388 | debug_start_match(prog, do_utf8, strpos, strend, | |
1de06328 YO |
389 | sv ? "Guessing start of match in sv for" |
390 | : "Guessing start of match in string for"); | |
2a782b5b | 391 | ); |
cad2e5aa | 392 | |
c344f387 JH |
393 | /* CHR_DIST() would be more correct here but it makes things slow. */ |
394 | if (prog->minlen > strend - strpos) { | |
a3621e74 | 395 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
a72c7584 | 396 | "String too short... [re_intuit_start]\n")); |
cad2e5aa | 397 | goto fail; |
2c2d71f5 | 398 | } |
1de06328 | 399 | |
a1933d95 | 400 | strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos; |
1aa99e6b | 401 | PL_regeol = strend; |
33b8afdf JH |
402 | if (do_utf8) { |
403 | if (!prog->check_utf8 && prog->check_substr) | |
404 | to_utf8_substr(prog); | |
405 | check = prog->check_utf8; | |
406 | } else { | |
407 | if (!prog->check_substr && prog->check_utf8) | |
408 | to_byte_substr(prog); | |
409 | check = prog->check_substr; | |
410 | } | |
1de06328 | 411 | if (check == &PL_sv_undef) { |
a3621e74 | 412 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
1de06328 | 413 | "Non-utf8 string cannot match utf8 check string\n")); |
33b8afdf JH |
414 | goto fail; |
415 | } | |
bbe252da YO |
416 | if (prog->extflags & RXf_ANCH) { /* Match at beg-of-str or after \n */ |
417 | ml_anch = !( (prog->extflags & RXf_ANCH_SINGLE) | |
418 | || ( (prog->extflags & RXf_ANCH_BOL) | |
7fba1cd6 | 419 | && !multiline ) ); /* Check after \n? */ |
cad2e5aa | 420 | |
7e25d62c | 421 | if (!ml_anch) { |
bbe252da YO |
422 | if ( !(prog->extflags & RXf_ANCH_GPOS) /* Checked by the caller */ |
423 | && !(prog->intflags & PREGf_IMPLICIT) /* not a real BOL */ | |
3f7c398e | 424 | /* SvCUR is not set on references: SvRV and SvPVX_const overlap */ |
7e25d62c JH |
425 | && sv && !SvROK(sv) |
426 | && (strpos != strbeg)) { | |
a3621e74 | 427 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not at start...\n")); |
7e25d62c JH |
428 | goto fail; |
429 | } | |
430 | if (prog->check_offset_min == prog->check_offset_max && | |
bbe252da | 431 | !(prog->extflags & RXf_CANY_SEEN)) { |
2c2d71f5 | 432 | /* Substring at constant offset from beg-of-str... */ |
cad2e5aa JH |
433 | I32 slen; |
434 | ||
1aa99e6b | 435 | s = HOP3c(strpos, prog->check_offset_min, strend); |
1de06328 | 436 | |
653099ff GS |
437 | if (SvTAIL(check)) { |
438 | slen = SvCUR(check); /* >= 1 */ | |
cad2e5aa | 439 | |
9041c2e3 | 440 | if ( strend - s > slen || strend - s < slen - 1 |
2c2d71f5 | 441 | || (strend - s == slen && strend[-1] != '\n')) { |
a3621e74 | 442 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String too long...\n")); |
2c2d71f5 | 443 | goto fail_finish; |
cad2e5aa JH |
444 | } |
445 | /* Now should match s[0..slen-2] */ | |
446 | slen--; | |
3f7c398e | 447 | if (slen && (*SvPVX_const(check) != *s |
cad2e5aa | 448 | || (slen > 1 |
3f7c398e | 449 | && memNE(SvPVX_const(check), s, slen)))) { |
2c2d71f5 | 450 | report_neq: |
a3621e74 | 451 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "String not equal...\n")); |
2c2d71f5 JH |
452 | goto fail_finish; |
453 | } | |
cad2e5aa | 454 | } |
3f7c398e | 455 | else if (*SvPVX_const(check) != *s |
653099ff | 456 | || ((slen = SvCUR(check)) > 1 |
3f7c398e | 457 | && memNE(SvPVX_const(check), s, slen))) |
2c2d71f5 | 458 | goto report_neq; |
c315bfe8 | 459 | check_at = s; |
2c2d71f5 | 460 | goto success_at_start; |
7e25d62c | 461 | } |
cad2e5aa | 462 | } |
2c2d71f5 | 463 | /* Match is anchored, but substr is not anchored wrt beg-of-str. */ |
cad2e5aa | 464 | s = strpos; |
2c2d71f5 | 465 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
1de06328 YO |
466 | end_shift = prog->check_end_shift; |
467 | ||
2c2d71f5 | 468 | if (!ml_anch) { |
a3b680e6 | 469 | const I32 end = prog->check_offset_max + CHR_SVLEN(check) |
653099ff | 470 | - (SvTAIL(check) != 0); |
a3b680e6 | 471 | const I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end; |
2c2d71f5 JH |
472 | |
473 | if (end_shift < eshift) | |
474 | end_shift = eshift; | |
475 | } | |
cad2e5aa | 476 | } |
2c2d71f5 | 477 | else { /* Can match at random position */ |
cad2e5aa JH |
478 | ml_anch = 0; |
479 | s = strpos; | |
1de06328 YO |
480 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
481 | end_shift = prog->check_end_shift; | |
482 | ||
483 | /* end shift should be non negative here */ | |
cad2e5aa JH |
484 | } |
485 | ||
2c2d71f5 | 486 | #ifdef DEBUGGING /* 7/99: reports of failure (with the older version) */ |
0033605d | 487 | if (end_shift < 0) |
1de06328 | 488 | Perl_croak(aTHX_ "panic: end_shift: %"IVdf" pattern:\n%s\n ", |
b57a0404 | 489 | (IV)end_shift, prog->precomp); |
2c2d71f5 JH |
490 | #endif |
491 | ||
2c2d71f5 JH |
492 | restart: |
493 | /* Find a possible match in the region s..strend by looking for | |
494 | the "check" substring in the region corrected by start/end_shift. */ | |
1de06328 YO |
495 | |
496 | { | |
497 | I32 srch_start_shift = start_shift; | |
498 | I32 srch_end_shift = end_shift; | |
499 | if (srch_start_shift < 0 && strbeg - s > srch_start_shift) { | |
500 | srch_end_shift -= ((strbeg - s) - srch_start_shift); | |
501 | srch_start_shift = strbeg - s; | |
502 | } | |
6bda09f9 | 503 | DEBUG_OPTIMISE_MORE_r({ |
1de06328 YO |
504 | PerlIO_printf(Perl_debug_log, "Check offset min: %"IVdf" Start shift: %"IVdf" End shift %"IVdf" Real End Shift: %"IVdf"\n", |
505 | (IV)prog->check_offset_min, | |
506 | (IV)srch_start_shift, | |
507 | (IV)srch_end_shift, | |
508 | (IV)prog->check_end_shift); | |
509 | }); | |
510 | ||
cad2e5aa | 511 | if (flags & REXEC_SCREAM) { |
cad2e5aa | 512 | I32 p = -1; /* Internal iterator of scream. */ |
a3b680e6 | 513 | I32 * const pp = data ? data->scream_pos : &p; |
cad2e5aa | 514 | |
2c2d71f5 JH |
515 | if (PL_screamfirst[BmRARE(check)] >= 0 |
516 | || ( BmRARE(check) == '\n' | |
517 | && (BmPREVIOUS(check) == SvCUR(check) - 1) | |
518 | && SvTAIL(check) )) | |
9041c2e3 | 519 | s = screaminstr(sv, check, |
1de06328 | 520 | srch_start_shift + (s - strbeg), srch_end_shift, pp, 0); |
cad2e5aa | 521 | else |
2c2d71f5 | 522 | goto fail_finish; |
4addbd3b HS |
523 | /* we may be pointing at the wrong string */ |
524 | if (s && RX_MATCH_COPIED(prog)) | |
3f7c398e | 525 | s = strbeg + (s - SvPVX_const(sv)); |
cad2e5aa JH |
526 | if (data) |
527 | *data->scream_olds = s; | |
528 | } | |
1de06328 YO |
529 | else { |
530 | U8* start_point; | |
531 | U8* end_point; | |
bbe252da | 532 | if (prog->extflags & RXf_CANY_SEEN) { |
1de06328 YO |
533 | start_point= (U8*)(s + srch_start_shift); |
534 | end_point= (U8*)(strend - srch_end_shift); | |
535 | } else { | |
536 | start_point= HOP3(s, srch_start_shift, srch_start_shift < 0 ? strbeg : strend); | |
537 | end_point= HOP3(strend, -srch_end_shift, strbeg); | |
538 | } | |
6bda09f9 | 539 | DEBUG_OPTIMISE_MORE_r({ |
56570a2c | 540 | PerlIO_printf(Perl_debug_log, "fbm_instr len=%d str=<%.*s>\n", |
1de06328 | 541 | (int)(end_point - start_point), |
fc8cd66c | 542 | (int)(end_point - start_point) > 20 ? 20 : (int)(end_point - start_point), |
1de06328 YO |
543 | start_point); |
544 | }); | |
545 | ||
546 | s = fbm_instr( start_point, end_point, | |
7fba1cd6 | 547 | check, multiline ? FBMrf_MULTILINE : 0); |
1de06328 YO |
548 | } |
549 | } | |
cad2e5aa JH |
550 | /* Update the count-of-usability, remove useless subpatterns, |
551 | unshift s. */ | |
2c2d71f5 | 552 | |
ab3bbdeb YO |
553 | DEBUG_EXECUTE_r({ |
554 | RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0), | |
555 | SvPVX_const(check), RE_SV_DUMPLEN(check), 30); | |
556 | PerlIO_printf(Perl_debug_log, "%s %s substr %s%s%s", | |
2c2d71f5 | 557 | (s ? "Found" : "Did not find"), |
ab3bbdeb YO |
558 | (check == (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) |
559 | ? "anchored" : "floating"), | |
560 | quoted, | |
561 | RE_SV_TAIL(check), | |
562 | (s ? " at offset " : "...\n") ); | |
563 | }); | |
2c2d71f5 JH |
564 | |
565 | if (!s) | |
566 | goto fail_finish; | |
2c2d71f5 | 567 | /* Finish the diagnostic message */ |
a3621e74 | 568 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) ); |
2c2d71f5 | 569 | |
1de06328 YO |
570 | /* XXX dmq: first branch is for positive lookbehind... |
571 | Our check string is offset from the beginning of the pattern. | |
572 | So we need to do any stclass tests offset forward from that | |
573 | point. I think. :-( | |
574 | */ | |
575 | ||
576 | ||
577 | ||
578 | check_at=s; | |
579 | ||
580 | ||
2c2d71f5 JH |
581 | /* Got a candidate. Check MBOL anchoring, and the *other* substr. |
582 | Start with the other substr. | |
583 | XXXX no SCREAM optimization yet - and a very coarse implementation | |
a0288114 | 584 | XXXX /ttx+/ results in anchored="ttx", floating="x". floating will |
2c2d71f5 JH |
585 | *always* match. Probably should be marked during compile... |
586 | Probably it is right to do no SCREAM here... | |
587 | */ | |
588 | ||
1de06328 YO |
589 | if (do_utf8 ? (prog->float_utf8 && prog->anchored_utf8) |
590 | : (prog->float_substr && prog->anchored_substr)) | |
591 | { | |
30944b6d | 592 | /* Take into account the "other" substring. */ |
2c2d71f5 JH |
593 | /* XXXX May be hopelessly wrong for UTF... */ |
594 | if (!other_last) | |
6eb5f6b9 | 595 | other_last = strpos; |
33b8afdf | 596 | if (check == (do_utf8 ? prog->float_utf8 : prog->float_substr)) { |
30944b6d IZ |
597 | do_other_anchored: |
598 | { | |
890ce7af AL |
599 | char * const last = HOP3c(s, -start_shift, strbeg); |
600 | char *last1, *last2; | |
be8e71aa | 601 | char * const saved_s = s; |
33b8afdf | 602 | SV* must; |
2c2d71f5 | 603 | |
2c2d71f5 JH |
604 | t = s - prog->check_offset_max; |
605 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ | |
1d86a7f9 | 606 | && (!do_utf8 |
0ce71af7 | 607 | || ((t = (char*)reghopmaybe3((U8*)s, -(prog->check_offset_max), (U8*)strpos)) |
2c2d71f5 | 608 | && t > strpos))) |
6f207bd3 | 609 | NOOP; |
2c2d71f5 JH |
610 | else |
611 | t = strpos; | |
1aa99e6b | 612 | t = HOP3c(t, prog->anchored_offset, strend); |
6eb5f6b9 JH |
613 | if (t < other_last) /* These positions already checked */ |
614 | t = other_last; | |
1aa99e6b | 615 | last2 = last1 = HOP3c(strend, -prog->minlen, strbeg); |
2c2d71f5 JH |
616 | if (last < last1) |
617 | last1 = last; | |
1de06328 YO |
618 | /* XXXX It is not documented what units *_offsets are in. |
619 | We assume bytes, but this is clearly wrong. | |
620 | Meaning this code needs to be carefully reviewed for errors. | |
621 | dmq. | |
622 | */ | |
623 | ||
2c2d71f5 | 624 | /* On end-of-str: see comment below. */ |
33b8afdf JH |
625 | must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr; |
626 | if (must == &PL_sv_undef) { | |
627 | s = (char*)NULL; | |
1de06328 | 628 | DEBUG_r(must = prog->anchored_utf8); /* for debug */ |
33b8afdf JH |
629 | } |
630 | else | |
631 | s = fbm_instr( | |
632 | (unsigned char*)t, | |
633 | HOP3(HOP3(last1, prog->anchored_offset, strend) | |
634 | + SvCUR(must), -(SvTAIL(must)!=0), strbeg), | |
635 | must, | |
7fba1cd6 | 636 | multiline ? FBMrf_MULTILINE : 0 |
33b8afdf | 637 | ); |
ab3bbdeb YO |
638 | DEBUG_EXECUTE_r({ |
639 | RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0), | |
640 | SvPVX_const(must), RE_SV_DUMPLEN(must), 30); | |
641 | PerlIO_printf(Perl_debug_log, "%s anchored substr %s%s", | |
2c2d71f5 | 642 | (s ? "Found" : "Contradicts"), |
ab3bbdeb YO |
643 | quoted, RE_SV_TAIL(must)); |
644 | }); | |
645 | ||
646 | ||
2c2d71f5 JH |
647 | if (!s) { |
648 | if (last1 >= last2) { | |
a3621e74 | 649 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
2c2d71f5 JH |
650 | ", giving up...\n")); |
651 | goto fail_finish; | |
652 | } | |
a3621e74 | 653 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
2c2d71f5 | 654 | ", trying floating at offset %ld...\n", |
be8e71aa | 655 | (long)(HOP3c(saved_s, 1, strend) - i_strpos))); |
1aa99e6b IH |
656 | other_last = HOP3c(last1, prog->anchored_offset+1, strend); |
657 | s = HOP3c(last, 1, strend); | |
2c2d71f5 JH |
658 | goto restart; |
659 | } | |
660 | else { | |
a3621e74 | 661 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", |
30944b6d | 662 | (long)(s - i_strpos))); |
1aa99e6b IH |
663 | t = HOP3c(s, -prog->anchored_offset, strbeg); |
664 | other_last = HOP3c(s, 1, strend); | |
be8e71aa | 665 | s = saved_s; |
2c2d71f5 JH |
666 | if (t == strpos) |
667 | goto try_at_start; | |
2c2d71f5 JH |
668 | goto try_at_offset; |
669 | } | |
30944b6d | 670 | } |
2c2d71f5 JH |
671 | } |
672 | else { /* Take into account the floating substring. */ | |
33b8afdf | 673 | char *last, *last1; |
be8e71aa | 674 | char * const saved_s = s; |
33b8afdf JH |
675 | SV* must; |
676 | ||
677 | t = HOP3c(s, -start_shift, strbeg); | |
678 | last1 = last = | |
679 | HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg); | |
680 | if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset) | |
681 | last = HOP3c(t, prog->float_max_offset, strend); | |
682 | s = HOP3c(t, prog->float_min_offset, strend); | |
683 | if (s < other_last) | |
684 | s = other_last; | |
2c2d71f5 | 685 | /* XXXX It is not documented what units *_offsets are in. Assume bytes. */ |
33b8afdf JH |
686 | must = do_utf8 ? prog->float_utf8 : prog->float_substr; |
687 | /* fbm_instr() takes into account exact value of end-of-str | |
688 | if the check is SvTAIL(ed). Since false positives are OK, | |
689 | and end-of-str is not later than strend we are OK. */ | |
690 | if (must == &PL_sv_undef) { | |
691 | s = (char*)NULL; | |
1de06328 | 692 | DEBUG_r(must = prog->float_utf8); /* for debug message */ |
33b8afdf JH |
693 | } |
694 | else | |
2c2d71f5 | 695 | s = fbm_instr((unsigned char*)s, |
33b8afdf JH |
696 | (unsigned char*)last + SvCUR(must) |
697 | - (SvTAIL(must)!=0), | |
7fba1cd6 | 698 | must, multiline ? FBMrf_MULTILINE : 0); |
ab3bbdeb YO |
699 | DEBUG_EXECUTE_r({ |
700 | RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0), | |
701 | SvPVX_const(must), RE_SV_DUMPLEN(must), 30); | |
702 | PerlIO_printf(Perl_debug_log, "%s floating substr %s%s", | |
33b8afdf | 703 | (s ? "Found" : "Contradicts"), |
ab3bbdeb YO |
704 | quoted, RE_SV_TAIL(must)); |
705 | }); | |
33b8afdf JH |
706 | if (!s) { |
707 | if (last1 == last) { | |
a3621e74 | 708 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
33b8afdf JH |
709 | ", giving up...\n")); |
710 | goto fail_finish; | |
2c2d71f5 | 711 | } |
a3621e74 | 712 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
33b8afdf | 713 | ", trying anchored starting at offset %ld...\n", |
be8e71aa | 714 | (long)(saved_s + 1 - i_strpos))); |
33b8afdf JH |
715 | other_last = last; |
716 | s = HOP3c(t, 1, strend); | |
717 | goto restart; | |
718 | } | |
719 | else { | |
a3621e74 | 720 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", |
33b8afdf JH |
721 | (long)(s - i_strpos))); |
722 | other_last = s; /* Fix this later. --Hugo */ | |
be8e71aa | 723 | s = saved_s; |
33b8afdf JH |
724 | if (t == strpos) |
725 | goto try_at_start; | |
726 | goto try_at_offset; | |
727 | } | |
2c2d71f5 | 728 | } |
cad2e5aa | 729 | } |
2c2d71f5 | 730 | |
1de06328 | 731 | |
9ef43ace | 732 | t= (char*)HOP3( s, -prog->check_offset_max, (prog->check_offset_max<0) ? strend : strpos); |
1de06328 | 733 | |
6bda09f9 | 734 | DEBUG_OPTIMISE_MORE_r( |
1de06328 YO |
735 | PerlIO_printf(Perl_debug_log, |
736 | "Check offset min:%"IVdf" max:%"IVdf" S:%"IVdf" t:%"IVdf" D:%"IVdf" end:%"IVdf"\n", | |
737 | (IV)prog->check_offset_min, | |
738 | (IV)prog->check_offset_max, | |
739 | (IV)(s-strpos), | |
740 | (IV)(t-strpos), | |
741 | (IV)(t-s), | |
742 | (IV)(strend-strpos) | |
743 | ) | |
744 | ); | |
745 | ||
2c2d71f5 | 746 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ |
1d86a7f9 | 747 | && (!do_utf8 |
9ef43ace | 748 | || ((t = (char*)reghopmaybe3((U8*)s, -prog->check_offset_max, (U8*) ((prog->check_offset_max<0) ? strend : strpos))) |
1de06328 YO |
749 | && t > strpos))) |
750 | { | |
2c2d71f5 JH |
751 | /* Fixed substring is found far enough so that the match |
752 | cannot start at strpos. */ | |
753 | try_at_offset: | |
cad2e5aa | 754 | if (ml_anch && t[-1] != '\n') { |
30944b6d IZ |
755 | /* Eventually fbm_*() should handle this, but often |
756 | anchored_offset is not 0, so this check will not be wasted. */ | |
757 | /* XXXX In the code below we prefer to look for "^" even in | |
758 | presence of anchored substrings. And we search even | |
759 | beyond the found float position. These pessimizations | |
760 | are historical artefacts only. */ | |
761 | find_anchor: | |
2c2d71f5 | 762 | while (t < strend - prog->minlen) { |
cad2e5aa | 763 | if (*t == '\n') { |
4ee3650e | 764 | if (t < check_at - prog->check_offset_min) { |
33b8afdf | 765 | if (do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) { |
4ee3650e GS |
766 | /* Since we moved from the found position, |
767 | we definitely contradict the found anchored | |
30944b6d IZ |
768 | substr. Due to the above check we do not |
769 | contradict "check" substr. | |
770 | Thus we can arrive here only if check substr | |
771 | is float. Redo checking for "other"=="fixed". | |
772 | */ | |
9041c2e3 | 773 | strpos = t + 1; |
a3621e74 | 774 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n", |
e4584336 | 775 | PL_colors[0], PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset))); |
30944b6d IZ |
776 | goto do_other_anchored; |
777 | } | |
4ee3650e GS |
778 | /* We don't contradict the found floating substring. */ |
779 | /* XXXX Why not check for STCLASS? */ | |
cad2e5aa | 780 | s = t + 1; |
a3621e74 | 781 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n", |
e4584336 | 782 | PL_colors[0], PL_colors[1], (long)(s - i_strpos))); |
cad2e5aa JH |
783 | goto set_useful; |
784 | } | |
4ee3650e GS |
785 | /* Position contradicts check-string */ |
786 | /* XXXX probably better to look for check-string | |
787 | than for "\n", so one should lower the limit for t? */ | |
a3621e74 | 788 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n", |
e4584336 | 789 | PL_colors[0], PL_colors[1], (long)(t + 1 - i_strpos))); |
0e41cd87 | 790 | other_last = strpos = s = t + 1; |
cad2e5aa JH |
791 | goto restart; |
792 | } | |
793 | t++; | |
794 | } | |
a3621e74 | 795 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n", |
e4584336 | 796 | PL_colors[0], PL_colors[1])); |
2c2d71f5 | 797 | goto fail_finish; |
cad2e5aa | 798 | } |
f5952150 | 799 | else { |
a3621e74 | 800 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n", |
e4584336 | 801 | PL_colors[0], PL_colors[1])); |
f5952150 | 802 | } |
cad2e5aa JH |
803 | s = t; |
804 | set_useful: | |
33b8afdf | 805 | ++BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr); /* hooray/5 */ |
cad2e5aa JH |
806 | } |
807 | else { | |
f5952150 | 808 | /* The found string does not prohibit matching at strpos, |
2c2d71f5 | 809 | - no optimization of calling REx engine can be performed, |
f5952150 GS |
810 | unless it was an MBOL and we are not after MBOL, |
811 | or a future STCLASS check will fail this. */ | |
2c2d71f5 JH |
812 | try_at_start: |
813 | /* Even in this situation we may use MBOL flag if strpos is offset | |
814 | wrt the start of the string. */ | |
05b4157f | 815 | if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */ |
a1933d95 | 816 | && (strpos != strbeg) && strpos[-1] != '\n' |
d506a20d | 817 | /* May be due to an implicit anchor of m{.*foo} */ |
bbe252da | 818 | && !(prog->intflags & PREGf_IMPLICIT)) |
d506a20d | 819 | { |
cad2e5aa JH |
820 | t = strpos; |
821 | goto find_anchor; | |
822 | } | |
a3621e74 | 823 | DEBUG_EXECUTE_r( if (ml_anch) |
f5952150 | 824 | PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n", |
e4584336 | 825 | (long)(strpos - i_strpos), PL_colors[0], PL_colors[1]); |
30944b6d | 826 | ); |
2c2d71f5 | 827 | success_at_start: |
bbe252da | 828 | if (!(prog->intflags & PREGf_NAUGHTY) /* XXXX If strpos moved? */ |
33b8afdf JH |
829 | && (do_utf8 ? ( |
830 | prog->check_utf8 /* Could be deleted already */ | |
831 | && --BmUSEFUL(prog->check_utf8) < 0 | |
832 | && (prog->check_utf8 == prog->float_utf8) | |
833 | ) : ( | |
834 | prog->check_substr /* Could be deleted already */ | |
835 | && --BmUSEFUL(prog->check_substr) < 0 | |
836 | && (prog->check_substr == prog->float_substr) | |
837 | ))) | |
66e933ab | 838 | { |
cad2e5aa | 839 | /* If flags & SOMETHING - do not do it many times on the same match */ |
a3621e74 | 840 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n")); |
33b8afdf JH |
841 | SvREFCNT_dec(do_utf8 ? prog->check_utf8 : prog->check_substr); |
842 | if (do_utf8 ? prog->check_substr : prog->check_utf8) | |
843 | SvREFCNT_dec(do_utf8 ? prog->check_substr : prog->check_utf8); | |
a0714e2c SS |
844 | prog->check_substr = prog->check_utf8 = NULL; /* disable */ |
845 | prog->float_substr = prog->float_utf8 = NULL; /* clear */ | |
846 | check = NULL; /* abort */ | |
cad2e5aa | 847 | s = strpos; |
3cf5c195 IZ |
848 | /* XXXX This is a remnant of the old implementation. It |
849 | looks wasteful, since now INTUIT can use many | |
6eb5f6b9 | 850 | other heuristics. */ |
bbe252da | 851 | prog->extflags &= ~RXf_USE_INTUIT; |
cad2e5aa JH |
852 | } |
853 | else | |
854 | s = strpos; | |
855 | } | |
856 | ||
6eb5f6b9 JH |
857 | /* Last resort... */ |
858 | /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */ | |
1de06328 YO |
859 | /* trie stclasses are too expensive to use here, we are better off to |
860 | leave it to regmatch itself */ | |
f8fc2ecf | 861 | if (progi->regstclass && PL_regkind[OP(progi->regstclass)]!=TRIE) { |
6eb5f6b9 JH |
862 | /* minlen == 0 is possible if regstclass is \b or \B, |
863 | and the fixed substr is ''$. | |
864 | Since minlen is already taken into account, s+1 is before strend; | |
865 | accidentally, minlen >= 1 guaranties no false positives at s + 1 | |
866 | even for \b or \B. But (minlen? 1 : 0) below assumes that | |
867 | regstclass does not come from lookahead... */ | |
868 | /* If regstclass takes bytelength more than 1: If charlength==1, OK. | |
869 | This leaves EXACTF only, which is dealt with in find_byclass(). */ | |
f8fc2ecf YO |
870 | const U8* const str = (U8*)STRING(progi->regstclass); |
871 | const int cl_l = (PL_regkind[OP(progi->regstclass)] == EXACT | |
872 | ? CHR_DIST(str+STR_LEN(progi->regstclass), str) | |
66e933ab | 873 | : 1); |
1de06328 YO |
874 | char * endpos; |
875 | if (prog->anchored_substr || prog->anchored_utf8 || ml_anch) | |
876 | endpos= HOP3c(s, (prog->minlen ? cl_l : 0), strend); | |
877 | else if (prog->float_substr || prog->float_utf8) | |
878 | endpos= HOP3c(HOP3c(check_at, -start_shift, strbeg), cl_l, strend); | |
879 | else | |
880 | endpos= strend; | |
881 | ||
56570a2c | 882 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "start_shift: %"IVdf" check_at: %d s: %d endpos: %d\n", |
b57a0404 | 883 | (IV)start_shift, check_at - strbeg, s - strbeg, endpos - strbeg)); |
1de06328 | 884 | |
6eb5f6b9 | 885 | t = s; |
f8fc2ecf | 886 | s = find_byclass(prog, progi->regstclass, s, endpos, NULL); |
6eb5f6b9 JH |
887 | if (!s) { |
888 | #ifdef DEBUGGING | |
cbbf8932 | 889 | const char *what = NULL; |
6eb5f6b9 JH |
890 | #endif |
891 | if (endpos == strend) { | |
a3621e74 | 892 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
6eb5f6b9 JH |
893 | "Could not match STCLASS...\n") ); |
894 | goto fail; | |
895 | } | |
a3621e74 | 896 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
66e933ab | 897 | "This position contradicts STCLASS...\n") ); |
bbe252da | 898 | if ((prog->extflags & RXf_ANCH) && !ml_anch) |
653099ff | 899 | goto fail; |
6eb5f6b9 | 900 | /* Contradict one of substrings */ |
33b8afdf JH |
901 | if (prog->anchored_substr || prog->anchored_utf8) { |
902 | if ((do_utf8 ? prog->anchored_utf8 : prog->anchored_substr) == check) { | |
a3621e74 | 903 | DEBUG_EXECUTE_r( what = "anchored" ); |
6eb5f6b9 | 904 | hop_and_restart: |
1aa99e6b | 905 | s = HOP3c(t, 1, strend); |
66e933ab GS |
906 | if (s + start_shift + end_shift > strend) { |
907 | /* XXXX Should be taken into account earlier? */ | |
a3621e74 | 908 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
66e933ab GS |
909 | "Could not match STCLASS...\n") ); |
910 | goto fail; | |
911 | } | |
5e39e1e5 HS |
912 | if (!check) |
913 | goto giveup; | |
a3621e74 | 914 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 915 | "Looking for %s substr starting at offset %ld...\n", |
6eb5f6b9 JH |
916 | what, (long)(s + start_shift - i_strpos)) ); |
917 | goto restart; | |
918 | } | |
66e933ab | 919 | /* Have both, check_string is floating */ |
6eb5f6b9 JH |
920 | if (t + start_shift >= check_at) /* Contradicts floating=check */ |
921 | goto retry_floating_check; | |
922 | /* Recheck anchored substring, but not floating... */ | |
9041c2e3 | 923 | s = check_at; |
5e39e1e5 HS |
924 | if (!check) |
925 | goto giveup; | |
a3621e74 | 926 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 927 | "Looking for anchored substr starting at offset %ld...\n", |
6eb5f6b9 JH |
928 | (long)(other_last - i_strpos)) ); |
929 | goto do_other_anchored; | |
930 | } | |
60e71179 GS |
931 | /* Another way we could have checked stclass at the |
932 | current position only: */ | |
933 | if (ml_anch) { | |
934 | s = t = t + 1; | |
5e39e1e5 HS |
935 | if (!check) |
936 | goto giveup; | |
a3621e74 | 937 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
f5952150 | 938 | "Looking for /%s^%s/m starting at offset %ld...\n", |
e4584336 | 939 | PL_colors[0], PL_colors[1], (long)(t - i_strpos)) ); |
60e71179 | 940 | goto try_at_offset; |
66e933ab | 941 | } |
33b8afdf | 942 | if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) /* Could have been deleted */ |
60e71179 | 943 | goto fail; |
6eb5f6b9 JH |
944 | /* Check is floating subtring. */ |
945 | retry_floating_check: | |
946 | t = check_at - start_shift; | |
a3621e74 | 947 | DEBUG_EXECUTE_r( what = "floating" ); |
6eb5f6b9 JH |
948 | goto hop_and_restart; |
949 | } | |
b7953727 | 950 | if (t != s) { |
a3621e74 | 951 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
6eb5f6b9 | 952 | "By STCLASS: moving %ld --> %ld\n", |
b7953727 JH |
953 | (long)(t - i_strpos), (long)(s - i_strpos)) |
954 | ); | |
955 | } | |
956 | else { | |
a3621e74 | 957 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
b7953727 JH |
958 | "Does not contradict STCLASS...\n"); |
959 | ); | |
960 | } | |
6eb5f6b9 | 961 | } |
5e39e1e5 | 962 | giveup: |
a3621e74 | 963 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n", |
5e39e1e5 HS |
964 | PL_colors[4], (check ? "Guessed" : "Giving up"), |
965 | PL_colors[5], (long)(s - i_strpos)) ); | |
cad2e5aa | 966 | return s; |
2c2d71f5 JH |
967 | |
968 | fail_finish: /* Substring not found */ | |
33b8afdf JH |
969 | if (prog->check_substr || prog->check_utf8) /* could be removed already */ |
970 | BmUSEFUL(do_utf8 ? prog->check_utf8 : prog->check_substr) += 5; /* hooray */ | |
cad2e5aa | 971 | fail: |
a3621e74 | 972 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n", |
e4584336 | 973 | PL_colors[4], PL_colors[5])); |
bd61b366 | 974 | return NULL; |
cad2e5aa | 975 | } |
9661b544 | 976 | |
786e8c11 | 977 | |
3b0527fe | 978 | |
4cadc6a9 YO |
979 | #define REXEC_TRIE_READ_CHAR(trie_type, trie, uc, uscan, len, uvc, charid, \ |
980 | foldlen, foldbuf, uniflags) STMT_START { \ | |
981 | switch (trie_type) { \ | |
982 | case trie_utf8_fold: \ | |
983 | if ( foldlen>0 ) { \ | |
984 | uvc = utf8n_to_uvuni( uscan, UTF8_MAXLEN, &len, uniflags ); \ | |
985 | foldlen -= len; \ | |
986 | uscan += len; \ | |
987 | len=0; \ | |
988 | } else { \ | |
989 | uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \ | |
990 | uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \ | |
991 | foldlen -= UNISKIP( uvc ); \ | |
992 | uscan = foldbuf + UNISKIP( uvc ); \ | |
993 | } \ | |
994 | break; \ | |
995 | case trie_utf8: \ | |
996 | uvc = utf8n_to_uvuni( (U8*)uc, UTF8_MAXLEN, &len, uniflags ); \ | |
997 | break; \ | |
998 | case trie_plain: \ | |
999 | uvc = (UV)*uc; \ | |
1000 | len = 1; \ | |
1001 | } \ | |
1002 | \ | |
1003 | if (uvc < 256) { \ | |
1004 | charid = trie->charmap[ uvc ]; \ | |
1005 | } \ | |
1006 | else { \ | |
1007 | charid = 0; \ | |
1008 | if (trie->widecharmap) { \ | |
1009 | SV** const svpp = hv_fetch(trie->widecharmap, \ | |
1010 | (char*)&uvc, sizeof(UV), 0); \ | |
1011 | if (svpp) \ | |
1012 | charid = (U16)SvIV(*svpp); \ | |
1013 | } \ | |
1014 | } \ | |
1015 | } STMT_END | |
1016 | ||
1017 | #define REXEC_FBC_EXACTISH_CHECK(CoNd) \ | |
1018 | if ( (CoNd) \ | |
1019 | && (ln == len || \ | |
1020 | ibcmp_utf8(s, NULL, 0, do_utf8, \ | |
1021 | m, NULL, ln, (bool)UTF)) \ | |
24b23f37 | 1022 | && (!reginfo || regtry(reginfo, &s)) ) \ |
4cadc6a9 YO |
1023 | goto got_it; \ |
1024 | else { \ | |
1025 | U8 foldbuf[UTF8_MAXBYTES_CASE+1]; \ | |
1026 | uvchr_to_utf8(tmpbuf, c); \ | |
1027 | f = to_utf8_fold(tmpbuf, foldbuf, &foldlen); \ | |
1028 | if ( f != c \ | |
1029 | && (f == c1 || f == c2) \ | |
1030 | && (ln == foldlen || \ | |
1031 | !ibcmp_utf8((char *) foldbuf, \ | |
1032 | NULL, foldlen, do_utf8, \ | |
1033 | m, \ | |
1034 | NULL, ln, (bool)UTF)) \ | |
24b23f37 | 1035 | && (!reginfo || regtry(reginfo, &s)) ) \ |
4cadc6a9 YO |
1036 | goto got_it; \ |
1037 | } \ | |
1038 | s += len | |
1039 | ||
1040 | #define REXEC_FBC_EXACTISH_SCAN(CoNd) \ | |
1041 | STMT_START { \ | |
1042 | while (s <= e) { \ | |
1043 | if ( (CoNd) \ | |
1044 | && (ln == 1 || !(OP(c) == EXACTF \ | |
1045 | ? ibcmp(s, m, ln) \ | |
1046 | : ibcmp_locale(s, m, ln))) \ | |
24b23f37 | 1047 | && (!reginfo || regtry(reginfo, &s)) ) \ |
4cadc6a9 YO |
1048 | goto got_it; \ |
1049 | s++; \ | |
1050 | } \ | |
1051 | } STMT_END | |
1052 | ||
1053 | #define REXEC_FBC_UTF8_SCAN(CoDe) \ | |
1054 | STMT_START { \ | |
1055 | while (s + (uskip = UTF8SKIP(s)) <= strend) { \ | |
1056 | CoDe \ | |
1057 | s += uskip; \ | |
1058 | } \ | |
1059 | } STMT_END | |
1060 | ||
1061 | #define REXEC_FBC_SCAN(CoDe) \ | |
1062 | STMT_START { \ | |
1063 | while (s < strend) { \ | |
1064 | CoDe \ | |
1065 | s++; \ | |
1066 | } \ | |
1067 | } STMT_END | |
1068 | ||
1069 | #define REXEC_FBC_UTF8_CLASS_SCAN(CoNd) \ | |
1070 | REXEC_FBC_UTF8_SCAN( \ | |
1071 | if (CoNd) { \ | |
24b23f37 | 1072 | if (tmp && (!reginfo || regtry(reginfo, &s))) \ |
4cadc6a9 YO |
1073 | goto got_it; \ |
1074 | else \ | |
1075 | tmp = doevery; \ | |
1076 | } \ | |
1077 | else \ | |
1078 | tmp = 1; \ | |
1079 | ) | |
1080 | ||
1081 | #define REXEC_FBC_CLASS_SCAN(CoNd) \ | |
1082 | REXEC_FBC_SCAN( \ | |
1083 | if (CoNd) { \ | |
24b23f37 | 1084 | if (tmp && (!reginfo || regtry(reginfo, &s))) \ |
4cadc6a9 YO |
1085 | goto got_it; \ |
1086 | else \ | |
1087 | tmp = doevery; \ | |
1088 | } \ | |
1089 | else \ | |
1090 | tmp = 1; \ | |
1091 | ) | |
1092 | ||
1093 | #define REXEC_FBC_TRYIT \ | |
24b23f37 | 1094 | if ((!reginfo || regtry(reginfo, &s))) \ |
4cadc6a9 YO |
1095 | goto got_it |
1096 | ||
1097 | #define REXEC_FBC_CSCAN_PRELOAD(UtFpReLoAd,CoNdUtF8,CoNd) \ | |
1098 | if (do_utf8) { \ | |
1099 | UtFpReLoAd; \ | |
1100 | REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \ | |
1101 | } \ | |
1102 | else { \ | |
1103 | REXEC_FBC_CLASS_SCAN(CoNd); \ | |
1104 | } \ | |
1105 | break | |
1106 | ||
1107 | #define REXEC_FBC_CSCAN_TAINT(CoNdUtF8,CoNd) \ | |
1108 | PL_reg_flags |= RF_tainted; \ | |
1109 | if (do_utf8) { \ | |
1110 | REXEC_FBC_UTF8_CLASS_SCAN(CoNdUtF8); \ | |
1111 | } \ | |
1112 | else { \ | |
1113 | REXEC_FBC_CLASS_SCAN(CoNd); \ | |
1114 | } \ | |
1115 | break | |
1116 | ||
786e8c11 YO |
1117 | #define DUMP_EXEC_POS(li,s,doutf8) \ |
1118 | dump_exec_pos(li,s,(PL_regeol),(PL_bostr),(PL_reg_starttry),doutf8) | |
1119 | ||
1120 | /* We know what class REx starts with. Try to find this position... */ | |
1121 | /* if reginfo is NULL, its a dryrun */ | |
1122 | /* annoyingly all the vars in this routine have different names from their counterparts | |
1123 | in regmatch. /grrr */ | |
1124 | ||
3c3eec57 | 1125 | STATIC char * |
07be1b83 | 1126 | S_find_byclass(pTHX_ regexp * prog, const regnode *c, char *s, |
24b23f37 | 1127 | const char *strend, regmatch_info *reginfo) |
a687059c | 1128 | { |
27da23d5 | 1129 | dVAR; |
bbe252da | 1130 | const I32 doevery = (prog->intflags & PREGf_SKIP) == 0; |
6eb5f6b9 | 1131 | char *m; |
d8093b23 | 1132 | STRLEN ln; |
5dab1207 | 1133 | STRLEN lnc; |
078c425b | 1134 | register STRLEN uskip; |
d8093b23 G |
1135 | unsigned int c1; |
1136 | unsigned int c2; | |
6eb5f6b9 JH |
1137 | char *e; |
1138 | register I32 tmp = 1; /* Scratch variable? */ | |
a3b680e6 | 1139 | register const bool do_utf8 = PL_reg_match_utf8; |
f8fc2ecf YO |
1140 | RXi_GET_DECL(prog,progi); |
1141 | ||
6eb5f6b9 JH |
1142 | /* We know what class it must start with. */ |
1143 | switch (OP(c)) { | |
6eb5f6b9 | 1144 | case ANYOF: |
388cc4de | 1145 | if (do_utf8) { |
4cadc6a9 | 1146 | REXEC_FBC_UTF8_CLASS_SCAN((ANYOF_FLAGS(c) & ANYOF_UNICODE) || |
388cc4de | 1147 | !UTF8_IS_INVARIANT((U8)s[0]) ? |
32fc9b6a | 1148 | reginclass(prog, c, (U8*)s, 0, do_utf8) : |
4cadc6a9 | 1149 | REGINCLASS(prog, c, (U8*)s)); |
388cc4de HS |
1150 | } |
1151 | else { | |
1152 | while (s < strend) { | |
1153 | STRLEN skip = 1; | |
1154 | ||
32fc9b6a | 1155 | if (REGINCLASS(prog, c, (U8*)s) || |
388cc4de HS |
1156 | (ANYOF_FOLD_SHARP_S(c, s, strend) && |
1157 | /* The assignment of 2 is intentional: | |
1158 | * for the folded sharp s, the skip is 2. */ | |
1159 | (skip = SHARP_S_SKIP))) { | |
24b23f37 | 1160 | if (tmp && (!reginfo || regtry(reginfo, &s))) |
388cc4de HS |
1161 | goto got_it; |
1162 | else | |
1163 | tmp = doevery; | |
1164 | } | |
1165 | else | |
1166 | tmp = 1; | |
1167 | s += skip; | |
1168 | } | |
a0d0e21e | 1169 | } |
6eb5f6b9 | 1170 | break; |
f33976b4 | 1171 | case CANY: |
4cadc6a9 | 1172 | REXEC_FBC_SCAN( |
24b23f37 | 1173 | if (tmp && (!reginfo || regtry(reginfo, &s))) |
f33976b4 DB |
1174 | goto got_it; |
1175 | else | |
1176 | tmp = doevery; | |
4cadc6a9 | 1177 | ); |
f33976b4 | 1178 | break; |
6eb5f6b9 | 1179 | case EXACTF: |
5dab1207 NIS |
1180 | m = STRING(c); |
1181 | ln = STR_LEN(c); /* length to match in octets/bytes */ | |
1182 | lnc = (I32) ln; /* length to match in characters */ | |
1aa99e6b | 1183 | if (UTF) { |
a2a2844f | 1184 | STRLEN ulen1, ulen2; |
5dab1207 | 1185 | U8 *sm = (U8 *) m; |
89ebb4a3 JH |
1186 | U8 tmpbuf1[UTF8_MAXBYTES_CASE+1]; |
1187 | U8 tmpbuf2[UTF8_MAXBYTES_CASE+1]; | |
4ad0818d | 1188 | const U32 uniflags = UTF8_ALLOW_DEFAULT; |
a2a2844f JH |
1189 | |
1190 | to_utf8_lower((U8*)m, tmpbuf1, &ulen1); | |
1191 | to_utf8_upper((U8*)m, tmpbuf2, &ulen2); | |
1192 | ||
89ebb4a3 | 1193 | c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXBYTES_CASE, |
041457d9 | 1194 | 0, uniflags); |
89ebb4a3 | 1195 | c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXBYTES_CASE, |
041457d9 | 1196 | 0, uniflags); |
5dab1207 NIS |
1197 | lnc = 0; |
1198 | while (sm < ((U8 *) m + ln)) { | |
1199 | lnc++; | |
1200 | sm += UTF8SKIP(sm); | |
1201 | } | |
1aa99e6b IH |
1202 | } |
1203 | else { | |
1204 | c1 = *(U8*)m; | |
1205 | c2 = PL_fold[c1]; | |
1206 | } | |
6eb5f6b9 JH |
1207 | goto do_exactf; |
1208 | case EXACTFL: | |
5dab1207 NIS |
1209 | m = STRING(c); |
1210 | ln = STR_LEN(c); | |
1211 | lnc = (I32) ln; | |
d8093b23 | 1212 | c1 = *(U8*)m; |
6eb5f6b9 JH |
1213 | c2 = PL_fold_locale[c1]; |
1214 | do_exactf: | |
db12adc6 | 1215 | e = HOP3c(strend, -((I32)lnc), s); |
b3c9acc1 | 1216 | |
3b0527fe | 1217 | if (!reginfo && e < s) |
6eb5f6b9 | 1218 | e = s; /* Due to minlen logic of intuit() */ |
1aa99e6b | 1219 | |
60a8b682 JH |
1220 | /* The idea in the EXACTF* cases is to first find the |
1221 | * first character of the EXACTF* node and then, if | |
1222 | * necessary, case-insensitively compare the full | |
1223 | * text of the node. The c1 and c2 are the first | |
1224 | * characters (though in Unicode it gets a bit | |
1225 | * more complicated because there are more cases | |
7f16dd3d JH |
1226 | * than just upper and lower: one needs to use |
1227 | * the so-called folding case for case-insensitive | |
1228 | * matching (called "loose matching" in Unicode). | |
1229 | * ibcmp_utf8() will do just that. */ | |
60a8b682 | 1230 | |
1aa99e6b | 1231 | if (do_utf8) { |
575cac57 | 1232 | UV c, f; |
89ebb4a3 | 1233 | U8 tmpbuf [UTF8_MAXBYTES+1]; |
575cac57 | 1234 | STRLEN len, foldlen; |
4ad0818d | 1235 | const U32 uniflags = UTF8_ALLOW_DEFAULT; |
09091399 | 1236 | if (c1 == c2) { |
5dab1207 NIS |
1237 | /* Upper and lower of 1st char are equal - |
1238 | * probably not a "letter". */ | |
1aa99e6b | 1239 | while (s <= e) { |
89ebb4a3 | 1240 | c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len, |
041457d9 | 1241 | uniflags); |
4cadc6a9 | 1242 | REXEC_FBC_EXACTISH_CHECK(c == c1); |
1aa99e6b | 1243 | } |
09091399 JH |
1244 | } |
1245 | else { | |
1aa99e6b | 1246 | while (s <= e) { |
89ebb4a3 | 1247 | c = utf8n_to_uvchr((U8*)s, UTF8_MAXBYTES, &len, |
041457d9 | 1248 | uniflags); |
80aecb99 | 1249 | |
60a8b682 | 1250 | /* Handle some of the three Greek sigmas cases. |
8c01da3c JH |
1251 | * Note that not all the possible combinations |
1252 | * are handled here: some of them are handled | |
1253 | * by the standard folding rules, and some of | |
1254 | * them (the character class or ANYOF cases) | |
1255 | * are handled during compiletime in | |
1256 | * regexec.c:S_regclass(). */ | |
880bd946 JH |
1257 | if (c == (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA || |
1258 | c == (UV)UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) | |
1259 | c = (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA; | |
80aecb99 | 1260 | |
4cadc6a9 | 1261 | REXEC_FBC_EXACTISH_CHECK(c == c1 || c == c2); |
1aa99e6b | 1262 | } |
09091399 | 1263 | } |
1aa99e6b IH |
1264 | } |
1265 | else { | |
1266 | if (c1 == c2) | |
4cadc6a9 | 1267 | REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1); |
1aa99e6b | 1268 | else |
4cadc6a9 | 1269 | REXEC_FBC_EXACTISH_SCAN(*(U8*)s == c1 || *(U8*)s == c2); |
b3c9acc1 IZ |
1270 | } |
1271 | break; | |
bbce6d69 | 1272 | case BOUNDL: |
3280af22 | 1273 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 1274 | /* FALL THROUGH */ |
a0d0e21e | 1275 | case BOUND: |
ffc61ed2 | 1276 | if (do_utf8) { |
12d33761 | 1277 | if (s == PL_bostr) |
ffc61ed2 JH |
1278 | tmp = '\n'; |
1279 | else { | |
6136c704 | 1280 | U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr); |
4ad0818d | 1281 | tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT); |
ffc61ed2 JH |
1282 | } |
1283 | tmp = ((OP(c) == BOUND ? | |
9041c2e3 | 1284 | isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0); |
1a4fad37 | 1285 | LOAD_UTF8_CHARCLASS_ALNUM(); |
4cadc6a9 | 1286 | REXEC_FBC_UTF8_SCAN( |
ffc61ed2 | 1287 | if (tmp == !(OP(c) == BOUND ? |
bb7a0f54 | 1288 | (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) : |
ffc61ed2 JH |
1289 | isALNUM_LC_utf8((U8*)s))) |
1290 | { | |
1291 | tmp = !tmp; | |
4cadc6a9 | 1292 | REXEC_FBC_TRYIT; |
a687059c | 1293 | } |
4cadc6a9 | 1294 | ); |
a0d0e21e | 1295 | } |
667bb95a | 1296 | else { |
12d33761 | 1297 | tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n'; |
ffc61ed2 | 1298 | tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0); |
4cadc6a9 | 1299 | REXEC_FBC_SCAN( |
ffc61ed2 JH |
1300 | if (tmp == |
1301 | !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) { | |
1302 | tmp = !tmp; | |
4cadc6a9 | 1303 | REXEC_FBC_TRYIT; |
a0ed51b3 | 1304 | } |
4cadc6a9 | 1305 | ); |
a0ed51b3 | 1306 | } |
24b23f37 | 1307 | if ((!prog->minlen && tmp) && (!reginfo || regtry(reginfo, &s))) |
a0ed51b3 LW |
1308 | goto got_it; |
1309 | break; | |
bbce6d69 | 1310 | case NBOUNDL: |
3280af22 | 1311 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 1312 | /* FALL THROUGH */ |
a0d0e21e | 1313 | case NBOUND: |
ffc61ed2 | 1314 | if (do_utf8) { |
12d33761 | 1315 | if (s == PL_bostr) |
ffc61ed2 JH |
1316 | tmp = '\n'; |
1317 | else { | |
6136c704 | 1318 | U8 * const r = reghop3((U8*)s, -1, (U8*)PL_bostr); |
4ad0818d | 1319 | tmp = utf8n_to_uvchr(r, UTF8SKIP(r), 0, UTF8_ALLOW_DEFAULT); |
ffc61ed2 JH |
1320 | } |
1321 | tmp = ((OP(c) == NBOUND ? | |
9041c2e3 | 1322 | isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0); |
1a4fad37 | 1323 | LOAD_UTF8_CHARCLASS_ALNUM(); |
4cadc6a9 | 1324 | REXEC_FBC_UTF8_SCAN( |
ffc61ed2 | 1325 | if (tmp == !(OP(c) == NBOUND ? |
bb7a0f54 | 1326 | (bool)swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) : |
ffc61ed2 JH |
1327 | isALNUM_LC_utf8((U8*)s))) |
1328 | tmp = !tmp; | |
4cadc6a9 YO |
1329 | else REXEC_FBC_TRYIT; |
1330 | ); | |
a0d0e21e | 1331 | } |
667bb95a | 1332 | else { |
12d33761 | 1333 | tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n'; |
ffc61ed2 JH |
1334 | tmp = ((OP(c) == NBOUND ? |
1335 | isALNUM(tmp) : isALNUM_LC(tmp)) != 0); | |
4cadc6a9 | 1336 | REXEC_FBC_SCAN( |
ffc61ed2 JH |
1337 | if (tmp == |
1338 | !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s))) | |
1339 | tmp = !tmp; | |
4cadc6a9 YO |
1340 | else REXEC_FBC_TRYIT; |
1341 | ); | |
a0ed51b3 | 1342 | } |
24b23f37 | 1343 | if ((!prog->minlen && !tmp) && (!reginfo || regtry(reginfo, &s))) |
a0ed51b3 LW |
1344 | goto got_it; |
1345 | break; | |
a0d0e21e | 1346 | case ALNUM: |
4cadc6a9 YO |
1347 | REXEC_FBC_CSCAN_PRELOAD( |
1348 | LOAD_UTF8_CHARCLASS_ALNUM(), | |
1349 | swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8), | |
1350 | isALNUM(*s) | |
1351 | ); | |
bbce6d69 | 1352 | case ALNUML: |
4cadc6a9 YO |
1353 | REXEC_FBC_CSCAN_TAINT( |
1354 | isALNUM_LC_utf8((U8*)s), | |
1355 | isALNUM_LC(*s) | |
1356 | ); | |
a0d0e21e | 1357 | case NALNUM: |
4cadc6a9 YO |
1358 | REXEC_FBC_CSCAN_PRELOAD( |
1359 | LOAD_UTF8_CHARCLASS_ALNUM(), | |
1360 | !swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8), | |
1361 | !isALNUM(*s) | |
1362 | ); | |
bbce6d69 | 1363 | case NALNUML: |
4cadc6a9 YO |
1364 | REXEC_FBC_CSCAN_TAINT( |
1365 | !isALNUM_LC_utf8((U8*)s), | |
1366 | !isALNUM_LC(*s) | |
1367 | ); | |
a0d0e21e | 1368 | case SPACE: |
4cadc6a9 YO |
1369 | REXEC_FBC_CSCAN_PRELOAD( |
1370 | LOAD_UTF8_CHARCLASS_SPACE(), | |
1371 | *s == ' ' || swash_fetch(PL_utf8_space,(U8*)s, do_utf8), | |
1372 | isSPACE(*s) | |
1373 | ); | |
bbce6d69 | 1374 | case SPACEL: |
4cadc6a9 YO |
1375 | REXEC_FBC_CSCAN_TAINT( |
1376 | *s == ' ' || isSPACE_LC_utf8((U8*)s), | |
1377 | isSPACE_LC(*s) | |
1378 | ); | |
a0d0e21e | 1379 | case NSPACE: |
4cadc6a9 YO |
1380 | REXEC_FBC_CSCAN_PRELOAD( |
1381 | LOAD_UTF8_CHARCLASS_SPACE(), | |
1382 | !(*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s, do_utf8)), | |
1383 | !isSPACE(*s) | |
1384 | ); | |
bbce6d69 | 1385 | case NSPACEL: |
4cadc6a9 YO |
1386 | REXEC_FBC_CSCAN_TAINT( |
1387 | !(*s == ' ' || isSPACE_LC_utf8((U8*)s)), | |
1388 | !isSPACE_LC(*s) | |
1389 | ); | |
a0d0e21e | 1390 | case DIGIT: |
4cadc6a9 YO |
1391 | REXEC_FBC_CSCAN_PRELOAD( |
1392 | LOAD_UTF8_CHARCLASS_DIGIT(), | |
1393 | swash_fetch(PL_utf8_digit,(U8*)s, do_utf8), | |
1394 | isDIGIT(*s) | |
1395 | ); | |
b8c5462f | 1396 | case DIGITL: |
4cadc6a9 YO |
1397 | REXEC_FBC_CSCAN_TAINT( |
1398 | isDIGIT_LC_utf8((U8*)s), | |
1399 | isDIGIT_LC(*s) | |
1400 | ); | |
a0d0e21e | 1401 | case NDIGIT: |
4cadc6a9 YO |
1402 | REXEC_FBC_CSCAN_PRELOAD( |
1403 | LOAD_UTF8_CHARCLASS_DIGIT(), | |
1404 | !swash_fetch(PL_utf8_digit,(U8*)s, do_utf8), | |
1405 | !isDIGIT(*s) | |
1406 | ); | |
b8c5462f | 1407 | case NDIGITL: |
4cadc6a9 YO |
1408 | REXEC_FBC_CSCAN_TAINT( |
1409 | !isDIGIT_LC_utf8((U8*)s), | |
1410 | !isDIGIT_LC(*s) | |
1411 | ); | |
1de06328 YO |
1412 | case AHOCORASICKC: |
1413 | case AHOCORASICK: | |
07be1b83 YO |
1414 | { |
1415 | const enum { trie_plain, trie_utf8, trie_utf8_fold } | |
1416 | trie_type = do_utf8 ? | |
1417 | (c->flags == EXACT ? trie_utf8 : trie_utf8_fold) | |
1418 | : trie_plain; | |
1419 | /* what trie are we using right now */ | |
1420 | reg_ac_data *aho | |
f8fc2ecf | 1421 | = (reg_ac_data*)progi->data->data[ ARG( c ) ]; |
07be1b83 YO |
1422 | reg_trie_data *trie=aho->trie; |
1423 | ||
1424 | const char *last_start = strend - trie->minlen; | |
6148ee25 | 1425 | #ifdef DEBUGGING |
07be1b83 | 1426 | const char *real_start = s; |
6148ee25 | 1427 | #endif |
07be1b83 | 1428 | STRLEN maxlen = trie->maxlen; |
be8e71aa YO |
1429 | SV *sv_points; |
1430 | U8 **points; /* map of where we were in the input string | |
786e8c11 | 1431 | when reading a given char. For ASCII this |
be8e71aa YO |
1432 | is unnecessary overhead as the relationship |
1433 | is always 1:1, but for unicode, especially | |
1434 | case folded unicode this is not true. */ | |
f9e705e8 | 1435 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; |
786e8c11 YO |
1436 | U8 *bitmap=NULL; |
1437 | ||
07be1b83 YO |
1438 | |
1439 | GET_RE_DEBUG_FLAGS_DECL; | |
1440 | ||
be8e71aa YO |
1441 | /* We can't just allocate points here. We need to wrap it in |
1442 | * an SV so it gets freed properly if there is a croak while | |
1443 | * running the match */ | |
1444 | ENTER; | |
1445 | SAVETMPS; | |
1446 | sv_points=newSV(maxlen * sizeof(U8 *)); | |
1447 | SvCUR_set(sv_points, | |
1448 | maxlen * sizeof(U8 *)); | |
1449 | SvPOK_on(sv_points); | |
1450 | sv_2mortal(sv_points); | |
1451 | points=(U8**)SvPV_nolen(sv_points ); | |
1de06328 YO |
1452 | if ( trie_type != trie_utf8_fold |
1453 | && (trie->bitmap || OP(c)==AHOCORASICKC) ) | |
1454 | { | |
786e8c11 YO |
1455 | if (trie->bitmap) |
1456 | bitmap=(U8*)trie->bitmap; | |
1457 | else | |
1458 | bitmap=(U8*)ANYOF_BITMAP(c); | |
07be1b83 | 1459 | } |
786e8c11 YO |
1460 | /* this is the Aho-Corasick algorithm modified a touch |
1461 | to include special handling for long "unknown char" | |
1462 | sequences. The basic idea being that we use AC as long | |
1463 | as we are dealing with a possible matching char, when | |
1464 | we encounter an unknown char (and we have not encountered | |
1465 | an accepting state) we scan forward until we find a legal | |
1466 | starting char. | |
1467 | AC matching is basically that of trie matching, except | |
1468 | that when we encounter a failing transition, we fall back | |
1469 | to the current states "fail state", and try the current char | |
1470 | again, a process we repeat until we reach the root state, | |
1471 | state 1, or a legal transition. If we fail on the root state | |
1472 | then we can either terminate if we have reached an accepting | |
1473 | state previously, or restart the entire process from the beginning | |
1474 | if we have not. | |
1475 | ||
1476 | */ | |
07be1b83 YO |
1477 | while (s <= last_start) { |
1478 | const U32 uniflags = UTF8_ALLOW_DEFAULT; | |
1479 | U8 *uc = (U8*)s; | |
1480 | U16 charid = 0; | |
1481 | U32 base = 1; | |
1482 | U32 state = 1; | |
1483 | UV uvc = 0; | |
1484 | STRLEN len = 0; | |
1485 | STRLEN foldlen = 0; | |
1486 | U8 *uscan = (U8*)NULL; | |
1487 | U8 *leftmost = NULL; | |
786e8c11 YO |
1488 | #ifdef DEBUGGING |
1489 | U32 accepted_word= 0; | |
1490 | #endif | |
07be1b83 YO |
1491 | U32 pointpos = 0; |
1492 | ||
1493 | while ( state && uc <= (U8*)strend ) { | |
1494 | int failed=0; | |
786e8c11 YO |
1495 | U32 word = aho->states[ state ].wordnum; |
1496 | ||
1de06328 YO |
1497 | if( state==1 ) { |
1498 | if ( bitmap ) { | |
1499 | DEBUG_TRIE_EXECUTE_r( | |
1500 | if ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) { | |
1501 | dump_exec_pos( (char *)uc, c, strend, real_start, | |
1502 | (char *)uc, do_utf8 ); | |
1503 | PerlIO_printf( Perl_debug_log, | |
1504 | " Scanning for legal start char...\n"); | |
1505 | } | |
1506 | ); | |
1507 | while ( uc <= (U8*)last_start && !BITMAP_TEST(bitmap,*uc) ) { | |
1508 | uc++; | |
786e8c11 | 1509 | } |
1de06328 | 1510 | s= (char *)uc; |
786e8c11 | 1511 | } |
786e8c11 YO |
1512 | if (uc >(U8*)last_start) break; |
1513 | } | |
1514 | ||
1515 | if ( word ) { | |
1516 | U8 *lpos= points[ (pointpos - trie->wordlen[word-1] ) % maxlen ]; | |
1517 | if (!leftmost || lpos < leftmost) { | |
1518 | DEBUG_r(accepted_word=word); | |
07be1b83 | 1519 | leftmost= lpos; |
786e8c11 | 1520 | } |
07be1b83 | 1521 | if (base==0) break; |
786e8c11 | 1522 | |
07be1b83 YO |
1523 | } |
1524 | points[pointpos++ % maxlen]= uc; | |
4cadc6a9 YO |
1525 | REXEC_TRIE_READ_CHAR(trie_type, trie, uc, uscan, len, |
1526 | uvc, charid, foldlen, foldbuf, uniflags); | |
786e8c11 YO |
1527 | DEBUG_TRIE_EXECUTE_r({ |
1528 | dump_exec_pos( (char *)uc, c, strend, real_start, | |
1529 | s, do_utf8 ); | |
07be1b83 | 1530 | PerlIO_printf(Perl_debug_log, |
786e8c11 YO |
1531 | " Charid:%3u CP:%4"UVxf" ", |
1532 | charid, uvc); | |
1533 | }); | |
07be1b83 YO |
1534 | |
1535 | do { | |
6148ee25 | 1536 | #ifdef DEBUGGING |
786e8c11 | 1537 | word = aho->states[ state ].wordnum; |
6148ee25 | 1538 | #endif |
07be1b83 YO |
1539 | base = aho->states[ state ].trans.base; |
1540 | ||
786e8c11 YO |
1541 | DEBUG_TRIE_EXECUTE_r({ |
1542 | if (failed) | |
1543 | dump_exec_pos( (char *)uc, c, strend, real_start, | |
1544 | s, do_utf8 ); | |
07be1b83 | 1545 | PerlIO_printf( Perl_debug_log, |
786e8c11 YO |
1546 | "%sState: %4"UVxf", word=%"UVxf, |
1547 | failed ? " Fail transition to " : "", | |
1548 | (UV)state, (UV)word); | |
1549 | }); | |
07be1b83 YO |
1550 | if ( base ) { |
1551 | U32 tmp; | |
1552 | if (charid && | |
1553 | (base + charid > trie->uniquecharcount ) | |
1554 | && (base + charid - 1 - trie->uniquecharcount | |
1555 | < trie->lasttrans) | |
1556 | && trie->trans[base + charid - 1 - | |
1557 | trie->uniquecharcount].check == state | |
1558 | && (tmp=trie->trans[base + charid - 1 - | |
1559 | trie->uniquecharcount ].next)) | |
1560 | { | |
786e8c11 YO |
1561 | DEBUG_TRIE_EXECUTE_r( |
1562 | PerlIO_printf( Perl_debug_log," - legal\n")); | |
07be1b83 YO |
1563 | state = tmp; |
1564 | break; | |
1565 | } | |
1566 | else { | |
786e8c11 YO |
1567 | DEBUG_TRIE_EXECUTE_r( |
1568 | PerlIO_printf( Perl_debug_log," - fail\n")); | |
1569 | failed = 1; | |
1570 | state = aho->fail[state]; | |
07be1b83 YO |
1571 | } |
1572 | } | |
1573 | else { | |
1574 | /* we must be accepting here */ | |
786e8c11 YO |
1575 | DEBUG_TRIE_EXECUTE_r( |
1576 | PerlIO_printf( Perl_debug_log," - accepting\n")); | |
1577 | failed = 1; | |
07be1b83 YO |
1578 | break; |
1579 | } | |
1580 | } while(state); | |
786e8c11 | 1581 | uc += len; |
07be1b83 YO |
1582 | if (failed) { |
1583 | if (leftmost) | |
1584 | break; | |
786e8c11 | 1585 | if (!state) state = 1; |
07be1b83 YO |
1586 | } |
1587 | } | |
1588 | if ( aho->states[ state ].wordnum ) { | |
1589 | U8 *lpos = points[ (pointpos - trie->wordlen[aho->states[ state ].wordnum-1]) % maxlen ]; | |
786e8c11 YO |
1590 | if (!leftmost || lpos < leftmost) { |
1591 | DEBUG_r(accepted_word=aho->states[ state ].wordnum); | |
07be1b83 | 1592 | leftmost = lpos; |
786e8c11 | 1593 | } |
07be1b83 | 1594 | } |
07be1b83 YO |
1595 | if (leftmost) { |
1596 | s = (char*)leftmost; | |
786e8c11 YO |
1597 | DEBUG_TRIE_EXECUTE_r({ |
1598 | PerlIO_printf( | |
1599 | Perl_debug_log,"Matches word #%"UVxf" at position %d. Trying full pattern...\n", | |
1600 | (UV)accepted_word, s - real_start | |
1601 | ); | |
1602 | }); | |
24b23f37 | 1603 | if (!reginfo || regtry(reginfo, &s)) { |
be8e71aa YO |
1604 | FREETMPS; |
1605 | LEAVE; | |
07be1b83 | 1606 | goto got_it; |
be8e71aa | 1607 | } |
07be1b83 | 1608 | s = HOPc(s,1); |
786e8c11 YO |
1609 | DEBUG_TRIE_EXECUTE_r({ |
1610 | PerlIO_printf( Perl_debug_log,"Pattern failed. Looking for new start point...\n"); | |
1611 | }); | |
07be1b83 | 1612 | } else { |
786e8c11 YO |
1613 | DEBUG_TRIE_EXECUTE_r( |
1614 | PerlIO_printf( Perl_debug_log,"No match.\n")); | |
07be1b83 YO |
1615 | break; |
1616 | } | |
1617 | } | |
be8e71aa YO |
1618 | FREETMPS; |
1619 | LEAVE; | |
07be1b83 YO |
1620 | } |
1621 | break; | |
b3c9acc1 | 1622 | default: |
3c3eec57 GS |
1623 | Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c)); |
1624 | break; | |
d6a28714 | 1625 | } |
6eb5f6b9 JH |
1626 | return 0; |
1627 | got_it: | |
1628 | return s; | |
1629 | } | |
1630 | ||
1631 | /* | |
1632 | - regexec_flags - match a regexp against a string | |
1633 | */ | |
1634 | I32 | |
1635 | Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char *strend, | |
1636 | char *strbeg, I32 minend, SV *sv, void *data, U32 flags) | |
1637 | /* strend: pointer to null at end of string */ | |
1638 | /* strbeg: real beginning of string */ | |
1639 | /* minend: end of match must be >=minend after stringarg. */ | |
58e23c8d YO |
1640 | /* data: May be used for some additional optimizations. |
1641 | Currently its only used, with a U32 cast, for transmitting | |
1642 | the ganch offset when doing a /g match. This will change */ | |
6eb5f6b9 JH |
1643 | /* nosave: For optimizations. */ |
1644 | { | |
97aff369 | 1645 | dVAR; |
24b23f37 | 1646 | /*register*/ char *s; |
6eb5f6b9 | 1647 | register regnode *c; |
24b23f37 | 1648 | /*register*/ char *startpos = stringarg; |
6eb5f6b9 JH |
1649 | I32 minlen; /* must match at least this many chars */ |
1650 | I32 dontbother = 0; /* how many characters not to try at end */ | |
6eb5f6b9 JH |
1651 | I32 end_shift = 0; /* Same for the end. */ /* CC */ |
1652 | I32 scream_pos = -1; /* Internal iterator of scream. */ | |
ccac19ea | 1653 | char *scream_olds = NULL; |
3dab1dad | 1654 | SV* const oreplsv = GvSV(PL_replgv); |
f9f4320a | 1655 | const bool do_utf8 = (bool)DO_UTF8(sv); |
2757e526 | 1656 | I32 multiline; |
f8fc2ecf | 1657 | RXi_GET_DECL(prog,progi); |
3b0527fe | 1658 | regmatch_info reginfo; /* create some info to pass to regtry etc */ |
a3621e74 YO |
1659 | |
1660 | GET_RE_DEBUG_FLAGS_DECL; | |
1661 | ||
9d4ba2ae | 1662 | PERL_UNUSED_ARG(data); |
6eb5f6b9 JH |
1663 | |
1664 | /* Be paranoid... */ | |
1665 | if (prog == NULL || startpos == NULL) { | |
1666 | Perl_croak(aTHX_ "NULL regexp parameter"); | |
1667 | return 0; | |
1668 | } | |
1669 | ||
bbe252da | 1670 | multiline = prog->extflags & RXf_PMf_MULTILINE; |
3b0527fe | 1671 | reginfo.prog = prog; |
2757e526 | 1672 | |
bac06658 | 1673 | RX_MATCH_UTF8_set(prog, do_utf8); |
1de06328 YO |
1674 | DEBUG_EXECUTE_r( |
1675 | debug_start_match(prog, do_utf8, startpos, strend, | |
1676 | "Matching"); | |
1677 | ); | |
bac06658 | 1678 | |
6eb5f6b9 | 1679 | minlen = prog->minlen; |
1de06328 YO |
1680 | |
1681 | if (strend - startpos < (minlen+(prog->check_offset_min<0?prog->check_offset_min:0))) { | |
a3621e74 | 1682 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
a72c7584 JH |
1683 | "String too short [regexec_flags]...\n")); |
1684 | goto phooey; | |
1aa99e6b | 1685 | } |
6eb5f6b9 | 1686 | |
1de06328 | 1687 | |
6eb5f6b9 | 1688 | /* Check validity of program. */ |
f8fc2ecf | 1689 | if (UCHARAT(progi->program) != REG_MAGIC) { |
6eb5f6b9 JH |
1690 | Perl_croak(aTHX_ "corrupted regexp program"); |
1691 | } | |
1692 | ||
1693 | PL_reg_flags = 0; | |
1694 | PL_reg_eval_set = 0; | |
1695 | PL_reg_maxiter = 0; | |
1696 | ||
bbe252da | 1697 | if (prog->extflags & RXf_UTF8) |
6eb5f6b9 JH |
1698 | PL_reg_flags |= RF_utf8; |
1699 | ||
1700 | /* Mark beginning of line for ^ and lookbehind. */ | |
3b0527fe | 1701 | reginfo.bol = startpos; /* XXX not used ??? */ |
6eb5f6b9 | 1702 | PL_bostr = strbeg; |
3b0527fe | 1703 | reginfo.sv = sv; |
6eb5f6b9 JH |
1704 | |
1705 | /* Mark end of line for $ (and such) */ | |
1706 | PL_regeol = strend; | |
1707 | ||
1708 | /* see how far we have to get to not match where we matched before */ | |
3b0527fe | 1709 | reginfo.till = startpos+minend; |
6eb5f6b9 | 1710 | |
6eb5f6b9 JH |
1711 | /* If there is a "must appear" string, look for it. */ |
1712 | s = startpos; | |
1713 | ||
bbe252da | 1714 | if (prog->extflags & RXf_GPOS_SEEN) { /* Need to set reginfo->ganch */ |
6eb5f6b9 JH |
1715 | MAGIC *mg; |
1716 | ||
1717 | if (flags & REXEC_IGNOREPOS) /* Means: check only at start */ | |
58e23c8d | 1718 | reginfo.ganch = startpos + prog->gofs; |
6eb5f6b9 JH |
1719 | else if (sv && SvTYPE(sv) >= SVt_PVMG |
1720 | && SvMAGIC(sv) | |
14befaf4 DM |
1721 | && (mg = mg_find(sv, PERL_MAGIC_regex_global)) |
1722 | && mg->mg_len >= 0) { | |
3b0527fe | 1723 | reginfo.ganch = strbeg + mg->mg_len; /* Defined pos() */ |
bbe252da | 1724 | if (prog->extflags & RXf_ANCH_GPOS) { |
3b0527fe | 1725 | if (s > reginfo.ganch) |
6eb5f6b9 | 1726 | goto phooey; |
58e23c8d | 1727 | s = reginfo.ganch - prog->gofs; |
6eb5f6b9 JH |
1728 | } |
1729 | } | |
58e23c8d YO |
1730 | else if (data) { |
1731 | reginfo.ganch = strbeg + (UV)data; | |
1732 | } else /* pos() not defined */ | |
3b0527fe | 1733 | reginfo.ganch = strbeg; |
6eb5f6b9 | 1734 | } |
c74340f9 YO |
1735 | if (PL_curpm && (PM_GETRE(PL_curpm) == prog)) { |
1736 | I32 *t; | |
f8fc2ecf | 1737 | if (!progi->swap) { |
c74340f9 YO |
1738 | /* We have to be careful. If the previous successful match |
1739 | was from this regex we don't want a subsequent paritally | |
1740 | successful match to clobber the old results. | |
1741 | So when we detect this possibility we add a swap buffer | |
1742 | to the re, and switch the buffer each match. If we fail | |
1743 | we switch it back, otherwise we leave it swapped. | |
1744 | */ | |
f8fc2ecf | 1745 | Newxz(progi->swap, 1, regexp_paren_ofs); |
c74340f9 | 1746 | /* no need to copy these */ |
f8fc2ecf YO |
1747 | Newxz(progi->swap->startp, prog->nparens + 1, I32); |
1748 | Newxz(progi->swap->endp, prog->nparens + 1, I32); | |
c74340f9 | 1749 | } |
f8fc2ecf YO |
1750 | t = progi->swap->startp; |
1751 | progi->swap->startp = prog->startp; | |
c74340f9 | 1752 | prog->startp = t; |
f8fc2ecf YO |
1753 | t = progi->swap->endp; |
1754 | progi->swap->endp = prog->endp; | |
c74340f9 YO |
1755 | prog->endp = t; |
1756 | } | |
a0714e2c | 1757 | if (!(flags & REXEC_CHECKED) && (prog->check_substr != NULL || prog->check_utf8 != NULL)) { |
6eb5f6b9 JH |
1758 | re_scream_pos_data d; |
1759 | ||
1760 | d.scream_olds = &scream_olds; | |
1761 | d.scream_pos = &scream_pos; | |
1762 | s = re_intuit_start(prog, sv, s, strend, flags, &d); | |
3fa9c3d7 | 1763 | if (!s) { |
a3621e74 | 1764 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Not present...\n")); |
6eb5f6b9 | 1765 | goto phooey; /* not present */ |
3fa9c3d7 | 1766 | } |
6eb5f6b9 JH |
1767 | } |
1768 | ||
1de06328 | 1769 | |
6eb5f6b9 JH |
1770 | |
1771 | /* Simplest case: anchored match need be tried only once. */ | |
1772 | /* [unless only anchor is BOL and multiline is set] */ | |
bbe252da | 1773 | if (prog->extflags & (RXf_ANCH & ~RXf_ANCH_GPOS)) { |
24b23f37 | 1774 | if (s == startpos && regtry(®info, &startpos)) |
6eb5f6b9 | 1775 | goto got_it; |
bbe252da YO |
1776 | else if (multiline || (prog->intflags & PREGf_IMPLICIT) |
1777 | || (prog->extflags & RXf_ANCH_MBOL)) /* XXXX SBOL? */ | |
6eb5f6b9 JH |
1778 | { |
1779 | char *end; | |
1780 | ||
1781 | if (minlen) | |
1782 | dontbother = minlen - 1; | |
1aa99e6b | 1783 | end = HOP3c(strend, -dontbother, strbeg) - 1; |
6eb5f6b9 | 1784 | /* for multiline we only have to try after newlines */ |
33b8afdf | 1785 | if (prog->check_substr || prog->check_utf8) { |
6eb5f6b9 JH |
1786 | if (s == startpos) |
1787 | goto after_try; | |
1788 | while (1) { | |
24b23f37 | 1789 | if (regtry(®info, &s)) |
6eb5f6b9 JH |
1790 | goto got_it; |
1791 | after_try: | |
1792 | if (s >= end) | |
1793 | goto phooey; | |
bbe252da | 1794 | if (prog->extflags & RXf_USE_INTUIT) { |
6eb5f6b9 JH |
1795 | s = re_intuit_start(prog, sv, s + 1, strend, flags, NULL); |
1796 | if (!s) | |
1797 | goto phooey; | |
1798 | } | |
1799 | else | |
1800 | s++; | |
1801 | } | |
1802 | } else { | |
1803 | if (s > startpos) | |
1804 | s--; | |
1805 | while (s < end) { | |
1806 | if (*s++ == '\n') { /* don't need PL_utf8skip here */ | |
24b23f37 | 1807 | if (regtry(®info, &s)) |
6eb5f6b9 JH |
1808 | goto got_it; |
1809 | } | |
1810 | } | |
1811 | } | |
1812 | } | |
1813 | goto phooey; | |
bbe252da | 1814 | } else if (RXf_GPOS_CHECK == (prog->extflags & RXf_GPOS_CHECK)) |
f9f4320a YO |
1815 | { |
1816 | /* the warning about reginfo.ganch being used without intialization | |
bbe252da | 1817 | is bogus -- we set it above, when prog->extflags & RXf_GPOS_SEEN |
f9f4320a | 1818 | and we only enter this block when the same bit is set. */ |
58e23c8d YO |
1819 | char *tmp_s = reginfo.ganch - prog->gofs; |
1820 | if (regtry(®info, &tmp_s)) | |
6eb5f6b9 JH |
1821 | goto got_it; |
1822 | goto phooey; | |
1823 | } | |
1824 | ||
1825 | /* Messy cases: unanchored match. */ | |
bbe252da | 1826 | if ((prog->anchored_substr || prog->anchored_utf8) && prog->intflags & PREGf_SKIP) { |
6eb5f6b9 JH |
1827 | /* we have /x+whatever/ */ |
1828 | /* it must be a one character string (XXXX Except UTF?) */ | |
33b8afdf | 1829 | char ch; |
bf93d4cc GS |
1830 | #ifdef DEBUGGING |
1831 | int did_match = 0; | |
1832 | #endif | |
33b8afdf JH |
1833 | if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)) |
1834 | do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog); | |
3f7c398e | 1835 | ch = SvPVX_const(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)[0]; |
bf93d4cc | 1836 | |
1aa99e6b | 1837 | if (do_utf8) { |
4cadc6a9 | 1838 | REXEC_FBC_SCAN( |
6eb5f6b9 | 1839 | if (*s == ch) { |
a3621e74 | 1840 | DEBUG_EXECUTE_r( did_match = 1 ); |
24b23f37 | 1841 | if (regtry(®info, &s)) goto got_it; |
6eb5f6b9 JH |
1842 | s += UTF8SKIP(s); |
1843 | while (s < strend && *s == ch) | |
1844 | s += UTF8SKIP(s); | |
1845 | } | |
4cadc6a9 | 1846 | ); |
6eb5f6b9 JH |
1847 | } |
1848 | else { | |
4cadc6a9 | 1849 | REXEC_FBC_SCAN( |
6eb5f6b9 | 1850 | if (*s == ch) { |
a3621e74 | 1851 | DEBUG_EXECUTE_r( did_match = 1 ); |
24b23f37 | 1852 | if (regtry(®info, &s)) goto got_it; |
6eb5f6b9 JH |
1853 | s++; |
1854 | while (s < strend && *s == ch) | |
1855 | s++; | |
1856 | } | |
4cadc6a9 | 1857 | ); |
6eb5f6b9 | 1858 | } |
a3621e74 | 1859 | DEBUG_EXECUTE_r(if (!did_match) |
bf93d4cc | 1860 | PerlIO_printf(Perl_debug_log, |
b7953727 JH |
1861 | "Did not find anchored character...\n") |
1862 | ); | |
6eb5f6b9 | 1863 | } |
a0714e2c SS |
1864 | else if (prog->anchored_substr != NULL |
1865 | || prog->anchored_utf8 != NULL | |
1866 | || ((prog->float_substr != NULL || prog->float_utf8 != NULL) | |
33b8afdf JH |
1867 | && prog->float_max_offset < strend - s)) { |
1868 | SV *must; | |
1869 | I32 back_max; | |
1870 | I32 back_min; | |
1871 | char *last; | |
6eb5f6b9 | 1872 | char *last1; /* Last position checked before */ |
bf93d4cc GS |
1873 | #ifdef DEBUGGING |
1874 | int did_match = 0; | |
1875 | #endif | |
33b8afdf JH |
1876 | if (prog->anchored_substr || prog->anchored_utf8) { |
1877 | if (!(do_utf8 ? prog->anchored_utf8 : prog->anchored_substr)) | |
1878 | do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog); | |
1879 | must = do_utf8 ? prog->anchored_utf8 : prog->anchored_substr; | |
1880 | back_max = back_min = prog->anchored_offset; | |
1881 | } else { | |
1882 | if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) | |
1883 | do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog); | |
1884 | must = do_utf8 ? prog->float_utf8 : prog->float_substr; | |
1885 | back_max = prog->float_max_offset; | |
1886 | back_min = prog->float_min_offset; | |
1887 | } | |
1de06328 YO |
1888 | |
1889 | ||
33b8afdf JH |
1890 | if (must == &PL_sv_undef) |
1891 | /* could not downgrade utf8 check substring, so must fail */ | |
1892 | goto phooey; | |
1893 | ||
1de06328 YO |
1894 | if (back_min<0) { |
1895 | last = strend; | |
1896 | } else { | |
1897 | last = HOP3c(strend, /* Cannot start after this */ | |
1898 | -(I32)(CHR_SVLEN(must) | |
1899 | - (SvTAIL(must) != 0) + back_min), strbeg); | |
1900 | } | |
6eb5f6b9 JH |
1901 | if (s > PL_bostr) |
1902 | last1 = HOPc(s, -1); | |
1903 | else | |
1904 | last1 = s - 1; /* bogus */ | |
1905 | ||
a0288114 | 1906 | /* XXXX check_substr already used to find "s", can optimize if |
6eb5f6b9 JH |
1907 | check_substr==must. */ |
1908 | scream_pos = -1; | |
1909 | dontbother = end_shift; | |
1910 | strend = HOPc(strend, -dontbother); | |
1911 | while ( (s <= last) && | |
9041c2e3 | 1912 | ((flags & REXEC_SCREAM) |
1de06328 | 1913 | ? (s = screaminstr(sv, must, HOP3c(s, back_min, (back_min<0 ? strbeg : strend)) - strbeg, |
6eb5f6b9 | 1914 | end_shift, &scream_pos, 0)) |
1de06328 | 1915 | : (s = fbm_instr((unsigned char*)HOP3(s, back_min, (back_min<0 ? strbeg : strend)), |
9041c2e3 | 1916 | (unsigned char*)strend, must, |
7fba1cd6 | 1917 | multiline ? FBMrf_MULTILINE : 0))) ) { |
4addbd3b HS |
1918 | /* we may be pointing at the wrong string */ |
1919 | if ((flags & REXEC_SCREAM) && RX_MATCH_COPIED(prog)) | |
3f7c398e | 1920 | s = strbeg + (s - SvPVX_const(sv)); |
a3621e74 | 1921 | DEBUG_EXECUTE_r( did_match = 1 ); |
6eb5f6b9 JH |
1922 | if (HOPc(s, -back_max) > last1) { |
1923 | last1 = HOPc(s, -back_min); | |
1924 | s = HOPc(s, -back_max); | |
1925 | } | |
1926 | else { | |
52657f30 | 1927 | char * const t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1; |
6eb5f6b9 JH |
1928 | |
1929 | last1 = HOPc(s, -back_min); | |
52657f30 | 1930 | s = t; |
6eb5f6b9 | 1931 | } |
1aa99e6b | 1932 | if (do_utf8) { |
6eb5f6b9 | 1933 | while (s <= last1) { |
24b23f37 | 1934 | if (regtry(®info, &s)) |
6eb5f6b9 JH |
1935 | goto got_it; |
1936 | s += UTF8SKIP(s); | |
1937 | } | |
1938 | } | |
1939 | else { | |
1940 | while (s <= last1) { | |
24b23f37 | 1941 | if (regtry(®info, &s)) |
6eb5f6b9 JH |
1942 | goto got_it; |
1943 | s++; | |
1944 | } | |
1945 | } | |
1946 | } | |
ab3bbdeb YO |
1947 | DEBUG_EXECUTE_r(if (!did_match) { |
1948 | RE_PV_QUOTED_DECL(quoted, do_utf8, PERL_DEBUG_PAD_ZERO(0), | |
1949 | SvPVX_const(must), RE_SV_DUMPLEN(must), 30); | |
1950 | PerlIO_printf(Perl_debug_log, "Did not find %s substr %s%s...\n", | |
33b8afdf | 1951 | ((must == prog->anchored_substr || must == prog->anchored_utf8) |
bf93d4cc | 1952 | ? "anchored" : "floating"), |
ab3bbdeb YO |
1953 | quoted, RE_SV_TAIL(must)); |
1954 | }); | |
6eb5f6b9 JH |
1955 | goto phooey; |
1956 | } | |
f8fc2ecf | 1957 | else if ( (c = progi->regstclass) ) { |
f14c76ed | 1958 | if (minlen) { |
f8fc2ecf | 1959 | const OPCODE op = OP(progi->regstclass); |
66e933ab | 1960 | /* don't bother with what can't match */ |
786e8c11 | 1961 | if (PL_regkind[op] != EXACT && op != CANY && PL_regkind[op] != TRIE) |
f14c76ed RGS |
1962 | strend = HOPc(strend, -(minlen - 1)); |
1963 | } | |
a3621e74 | 1964 | DEBUG_EXECUTE_r({ |
be8e71aa | 1965 | SV * const prop = sv_newmortal(); |
32fc9b6a | 1966 | regprop(prog, prop, c); |
0df25f3d | 1967 | { |
ab3bbdeb YO |
1968 | RE_PV_QUOTED_DECL(quoted,UTF,PERL_DEBUG_PAD_ZERO(1), |
1969 | s,strend-s,60); | |
0df25f3d | 1970 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb | 1971 | "Matching stclass %.*s against %s (%d chars)\n", |
e4f74956 | 1972 | (int)SvCUR(prop), SvPVX_const(prop), |
ab3bbdeb | 1973 | quoted, (int)(strend - s)); |
0df25f3d | 1974 | } |
ffc61ed2 | 1975 | }); |
3b0527fe | 1976 | if (find_byclass(prog, c, s, strend, ®info)) |
6eb5f6b9 | 1977 | goto got_it; |
07be1b83 | 1978 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass... [regexec_flags]\n")); |
d6a28714 JH |
1979 | } |
1980 | else { | |
1981 | dontbother = 0; | |
a0714e2c | 1982 | if (prog->float_substr != NULL || prog->float_utf8 != NULL) { |
33b8afdf | 1983 | /* Trim the end. */ |
d6a28714 | 1984 | char *last; |
33b8afdf JH |
1985 | SV* float_real; |
1986 | ||
1987 | if (!(do_utf8 ? prog->float_utf8 : prog->float_substr)) | |
1988 | do_utf8 ? to_utf8_substr(prog) : to_byte_substr(prog); | |
1989 | float_real = do_utf8 ? prog->float_utf8 : prog->float_substr; | |
d6a28714 JH |
1990 | |
1991 | if (flags & REXEC_SCREAM) { | |
33b8afdf | 1992 | last = screaminstr(sv, float_real, s - strbeg, |
d6a28714 JH |
1993 | end_shift, &scream_pos, 1); /* last one */ |
1994 | if (!last) | |
ffc61ed2 | 1995 | last = scream_olds; /* Only one occurrence. */ |
4addbd3b HS |
1996 | /* we may be pointing at the wrong string */ |
1997 | else if (RX_MATCH_COPIED(prog)) | |
3f7c398e | 1998 | s = strbeg + (s - SvPVX_const(sv)); |
b8c5462f | 1999 | } |
d6a28714 JH |
2000 | else { |
2001 | STRLEN len; | |
cfd0369c | 2002 | const char * const little = SvPV_const(float_real, len); |
d6a28714 | 2003 | |
33b8afdf | 2004 | if (SvTAIL(float_real)) { |
d6a28714 JH |
2005 | if (memEQ(strend - len + 1, little, len - 1)) |
2006 | last = strend - len + 1; | |
7fba1cd6 | 2007 | else if (!multiline) |
9041c2e3 | 2008 | last = memEQ(strend - len, little, len) |
bd61b366 | 2009 | ? strend - len : NULL; |
b8c5462f | 2010 | else |
d6a28714 JH |
2011 | goto find_last; |
2012 | } else { | |
2013 | find_last: | |
9041c2e3 | 2014 | if (len) |
d6a28714 | 2015 | last = rninstr(s, strend, little, little + len); |
b8c5462f | 2016 | else |
a0288114 | 2017 | last = strend; /* matching "$" */ |
b8c5462f | 2018 | } |
b8c5462f | 2019 | } |
bf93d4cc | 2020 | if (last == NULL) { |
6bda09f9 YO |
2021 | DEBUG_EXECUTE_r( |
2022 | PerlIO_printf(Perl_debug_log, | |
2023 | "%sCan't trim the tail, match fails (should not happen)%s\n", | |
2024 | PL_colors[4], PL_colors[5])); | |
bf93d4cc GS |
2025 | goto phooey; /* Should not happen! */ |
2026 | } | |
d6a28714 JH |
2027 | dontbother = strend - last + prog->float_min_offset; |
2028 | } | |
2029 | if (minlen && (dontbother < minlen)) | |
2030 | dontbother = minlen - 1; | |
2031 | strend -= dontbother; /* this one's always in bytes! */ | |
2032 | /* We don't know much -- general case. */ | |
1aa99e6b | 2033 | if (do_utf8) { |
d6a28714 | 2034 | for (;;) { |
24b23f37 | 2035 | if (regtry(®info, &s)) |
d6a28714 JH |
2036 | goto got_it; |
2037 | if (s >= strend) | |
2038 | break; | |
b8c5462f | 2039 | s += UTF8SKIP(s); |
d6a28714 JH |
2040 | }; |
2041 | } | |
2042 | else { | |
2043 | do { | |
24b23f37 | 2044 | if (regtry(®info, &s)) |
d6a28714 JH |
2045 | goto got_it; |
2046 | } while (s++ < strend); | |
2047 | } | |
2048 | } | |
2049 | ||
2050 | /* Failure. */ | |
2051 | goto phooey; | |
2052 | ||
2053 | got_it: | |
2054 | RX_MATCH_TAINTED_set(prog, PL_reg_flags & RF_tainted); | |
2055 | ||
2056 | if (PL_reg_eval_set) { | |
2057 | /* Preserve the current value of $^R */ | |
2058 | if (oreplsv != GvSV(PL_replgv)) | |
2059 | sv_setsv(oreplsv, GvSV(PL_replgv));/* So that when GvSV(replgv) is | |
2060 | restored, the value remains | |
2061 | the same. */ | |
4f639d21 | 2062 | restore_pos(aTHX_ prog); |
d6a28714 | 2063 | } |
81714fb9 YO |
2064 | if (prog->paren_names) |
2065 | (void)hv_iterinit(prog->paren_names); | |
d6a28714 JH |
2066 | |
2067 | /* make sure $`, $&, $', and $digit will work later */ | |
2068 | if ( !(flags & REXEC_NOT_FIRST) ) { | |
ed252734 | 2069 | RX_MATCH_COPY_FREE(prog); |
d6a28714 | 2070 | if (flags & REXEC_COPY_STR) { |
be8e71aa | 2071 | const I32 i = PL_regeol - startpos + (stringarg - strbeg); |
f8c7b90f | 2072 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2073 | if ((SvIsCOW(sv) |
2074 | || (SvFLAGS(sv) & CAN_COW_MASK) == CAN_COW_FLAGS)) { | |
2075 | if (DEBUG_C_TEST) { | |
2076 | PerlIO_printf(Perl_debug_log, | |
2077 | "Copy on write: regexp capture, type %d\n", | |
2078 | (int) SvTYPE(sv)); | |
2079 | } | |
2080 | prog->saved_copy = sv_setsv_cow(prog->saved_copy, sv); | |
d5263905 | 2081 | prog->subbeg = (char *)SvPVX_const(prog->saved_copy); |
ed252734 NC |
2082 | assert (SvPOKp(prog->saved_copy)); |
2083 | } else | |
2084 | #endif | |
2085 | { | |
2086 | RX_MATCH_COPIED_on(prog); | |
2087 | s = savepvn(strbeg, i); | |
2088 | prog->subbeg = s; | |
2089 | } | |
d6a28714 | 2090 | prog->sublen = i; |
d6a28714 JH |
2091 | } |
2092 | else { | |
2093 | prog->subbeg = strbeg; | |
2094 | prog->sublen = PL_regeol - strbeg; /* strend may have been modified */ | |
2095 | } | |
2096 | } | |
9041c2e3 | 2097 | |
d6a28714 JH |
2098 | return 1; |
2099 | ||
2100 | phooey: | |
a3621e74 | 2101 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n", |
e4584336 | 2102 | PL_colors[4], PL_colors[5])); |
d6a28714 | 2103 | if (PL_reg_eval_set) |
4f639d21 | 2104 | restore_pos(aTHX_ prog); |
f8fc2ecf | 2105 | if (progi->swap) { |
c74340f9 YO |
2106 | /* we failed :-( roll it back */ |
2107 | I32 *t; | |
f8fc2ecf YO |
2108 | t = progi->swap->startp; |
2109 | progi->swap->startp = prog->startp; | |
c74340f9 | 2110 | prog->startp = t; |
f8fc2ecf YO |
2111 | t = progi->swap->endp; |
2112 | progi->swap->endp = prog->endp; | |
c74340f9 YO |
2113 | prog->endp = t; |
2114 | } | |
d6a28714 JH |
2115 | return 0; |
2116 | } | |
2117 | ||
6bda09f9 | 2118 | |
d6a28714 JH |
2119 | /* |
2120 | - regtry - try match at specific point | |
2121 | */ | |
2122 | STATIC I32 /* 0 failure, 1 success */ | |
24b23f37 | 2123 | S_regtry(pTHX_ regmatch_info *reginfo, char **startpos) |
d6a28714 | 2124 | { |
97aff369 | 2125 | dVAR; |
d6a28714 JH |
2126 | register I32 *sp; |
2127 | register I32 *ep; | |
2128 | CHECKPOINT lastcp; | |
3b0527fe | 2129 | regexp *prog = reginfo->prog; |
f8fc2ecf | 2130 | RXi_GET_DECL(prog,progi); |
a3621e74 | 2131 | GET_RE_DEBUG_FLAGS_DECL; |
24b23f37 | 2132 | reginfo->cutpoint=NULL; |
d6a28714 | 2133 | |
bbe252da | 2134 | if ((prog->extflags & RXf_EVAL_SEEN) && !PL_reg_eval_set) { |
d6a28714 JH |
2135 | MAGIC *mg; |
2136 | ||
2137 | PL_reg_eval_set = RS_init; | |
a3621e74 | 2138 | DEBUG_EXECUTE_r(DEBUG_s( |
b900a521 JH |
2139 | PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n", |
2140 | (IV)(PL_stack_sp - PL_stack_base)); | |
d6a28714 | 2141 | )); |
ea8d6ae1 | 2142 | SAVESTACK_CXPOS(); |
d6a28714 JH |
2143 | cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base; |
2144 | /* Otherwise OP_NEXTSTATE will free whatever on stack now. */ | |
2145 | SAVETMPS; | |
2146 | /* Apparently this is not needed, judging by wantarray. */ | |
e8347627 | 2147 | /* SAVEI8(cxstack[cxstack_ix].blk_gimme); |
d6a28714 JH |
2148 | cxstack[cxstack_ix].blk_gimme = G_SCALAR; */ |
2149 | ||
3b0527fe | 2150 | if (reginfo->sv) { |
d6a28714 | 2151 | /* Make $_ available to executed code. */ |
3b0527fe | 2152 | if (reginfo->sv != DEFSV) { |
59f00321 | 2153 | SAVE_DEFSV; |
3b0527fe | 2154 | DEFSV = reginfo->sv; |
b8c5462f | 2155 | } |
d6a28714 | 2156 | |
3b0527fe DM |
2157 | if (!(SvTYPE(reginfo->sv) >= SVt_PVMG && SvMAGIC(reginfo->sv) |
2158 | && (mg = mg_find(reginfo->sv, PERL_MAGIC_regex_global)))) { | |
d6a28714 | 2159 | /* prepare for quick setting of pos */ |
d300d9fa | 2160 | #ifdef PERL_OLD_COPY_ON_WRITE |
51a9ea20 NC |
2161 | if (SvIsCOW(reginfo->sv)) |
2162 | sv_force_normal_flags(reginfo->sv, 0); | |
d300d9fa | 2163 | #endif |
3dab1dad | 2164 | mg = sv_magicext(reginfo->sv, NULL, PERL_MAGIC_regex_global, |
d300d9fa | 2165 | &PL_vtbl_mglob, NULL, 0); |
d6a28714 | 2166 | mg->mg_len = -1; |
b8c5462f | 2167 | } |
d6a28714 JH |
2168 | PL_reg_magic = mg; |
2169 | PL_reg_oldpos = mg->mg_len; | |
4f639d21 | 2170 | SAVEDESTRUCTOR_X(restore_pos, prog); |
d6a28714 | 2171 | } |
09687e5a | 2172 | if (!PL_reg_curpm) { |
a02a5408 | 2173 | Newxz(PL_reg_curpm, 1, PMOP); |
09687e5a AB |
2174 | #ifdef USE_ITHREADS |
2175 | { | |
be8e71aa | 2176 | SV* const repointer = newSViv(0); |
577e12cc | 2177 | /* so we know which PL_regex_padav element is PL_reg_curpm */ |
35061a7e | 2178 | SvFLAGS(repointer) |= SVf_BREAK; |
09687e5a AB |
2179 | av_push(PL_regex_padav,repointer); |
2180 | PL_reg_curpm->op_pmoffset = av_len(PL_regex_padav); | |
2181 | PL_regex_pad = AvARRAY(PL_regex_padav); | |
2182 | } | |
2183 | #endif | |
2184 | } | |
aaa362c4 | 2185 | PM_SETRE(PL_reg_curpm, prog); |
d6a28714 JH |
2186 | PL_reg_oldcurpm = PL_curpm; |
2187 | PL_curpm = PL_reg_curpm; | |
2188 | if (RX_MATCH_COPIED(prog)) { | |
2189 | /* Here is a serious problem: we cannot rewrite subbeg, | |
2190 | since it may be needed if this match fails. Thus | |
2191 | $` inside (?{}) could fail... */ | |
2192 | PL_reg_oldsaved = prog->subbeg; | |
2193 | PL_reg_oldsavedlen = prog->sublen; | |
f8c7b90f | 2194 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
2195 | PL_nrs = prog->saved_copy; |
2196 | #endif | |
d6a28714 JH |
2197 | RX_MATCH_COPIED_off(prog); |
2198 | } | |
2199 | else | |
bd61b366 | 2200 | PL_reg_oldsaved = NULL; |
d6a28714 JH |
2201 | prog->subbeg = PL_bostr; |
2202 | prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */ | |
2203 | } | |
24b23f37 YO |
2204 | DEBUG_EXECUTE_r(PL_reg_starttry = *startpos); |
2205 | prog->startp[0] = *startpos - PL_bostr; | |
2206 | PL_reginput = *startpos; | |
d6a28714 | 2207 | PL_reglastparen = &prog->lastparen; |
a01268b5 | 2208 | PL_reglastcloseparen = &prog->lastcloseparen; |
d6a28714 | 2209 | prog->lastparen = 0; |
03994de8 | 2210 | prog->lastcloseparen = 0; |
d6a28714 | 2211 | PL_regsize = 0; |
6bda09f9 YO |
2212 | PL_regstartp = prog->startp; |
2213 | PL_regendp = prog->endp; | |
d6a28714 JH |
2214 | if (PL_reg_start_tmpl <= prog->nparens) { |
2215 | PL_reg_start_tmpl = prog->nparens*3/2 + 3; | |
2216 | if(PL_reg_start_tmp) | |
2217 | Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*); | |
2218 | else | |
a02a5408 | 2219 | Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*); |
d6a28714 JH |
2220 | } |
2221 | ||
2222 | /* XXXX What this code is doing here?!!! There should be no need | |
2223 | to do this again and again, PL_reglastparen should take care of | |
3dd2943c | 2224 | this! --ilya*/ |
dafc8851 JH |
2225 | |
2226 | /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code. | |
2227 | * Actually, the code in regcppop() (which Ilya may be meaning by | |
daf18116 JH |
2228 | * PL_reglastparen), is not needed at all by the test suite |
2229 | * (op/regexp, op/pat, op/split), but that code is needed, oddly | |
2230 | * enough, for building DynaLoader, or otherwise this | |
2231 | * "Error: '*' not in typemap in DynaLoader.xs, line 164" | |
2232 | * will happen. Meanwhile, this code *is* needed for the | |
2233 | * above-mentioned test suite tests to succeed. The common theme | |
2234 | * on those tests seems to be returning null fields from matches. | |
2235 | * --jhi */ | |
dafc8851 | 2236 | #if 1 |
c74340f9 YO |
2237 | sp = PL_regstartp; |
2238 | ep = PL_regendp; | |
d6a28714 | 2239 | if (prog->nparens) { |
097eb12c | 2240 | register I32 i; |
eb160463 | 2241 | for (i = prog->nparens; i > (I32)*PL_reglastparen; i--) { |
d6a28714 JH |
2242 | *++sp = -1; |
2243 | *++ep = -1; | |
2244 | } | |
2245 | } | |
dafc8851 | 2246 | #endif |
02db2b7b | 2247 | REGCP_SET(lastcp); |
f8fc2ecf | 2248 | if (regmatch(reginfo, progi->program + 1)) { |
c74340f9 | 2249 | PL_regendp[0] = PL_reginput - PL_bostr; |
d6a28714 JH |
2250 | return 1; |
2251 | } | |
24b23f37 YO |
2252 | if (reginfo->cutpoint) |
2253 | *startpos= reginfo->cutpoint; | |
02db2b7b | 2254 | REGCP_UNWIND(lastcp); |
d6a28714 JH |
2255 | return 0; |
2256 | } | |
2257 | ||
02db2b7b | 2258 | |
8ba1375e MJD |
2259 | #define sayYES goto yes |
2260 | #define sayNO goto no | |
262b90c4 | 2261 | #define sayNO_SILENT goto no_silent |
8ba1375e | 2262 | |
f9f4320a YO |
2263 | /* we dont use STMT_START/END here because it leads to |
2264 | "unreachable code" warnings, which are bogus, but distracting. */ | |
2265 | #define CACHEsayNO \ | |
c476f425 DM |
2266 | if (ST.cache_mask) \ |
2267 | PL_reg_poscache[ST.cache_offset] |= ST.cache_mask; \ | |
f9f4320a | 2268 | sayNO |
3298f257 | 2269 | |
a3621e74 | 2270 | /* this is used to determine how far from the left messages like |
265c4333 YO |
2271 | 'failed...' are printed. It should be set such that messages |
2272 | are inline with the regop output that created them. | |
a3621e74 | 2273 | */ |
265c4333 | 2274 | #define REPORT_CODE_OFF 32 |
a3621e74 YO |
2275 | |
2276 | ||
2277 | /* Make sure there is a test for this +1 options in re_tests */ | |
2278 | #define TRIE_INITAL_ACCEPT_BUFFLEN 4; | |
2279 | ||
40a82448 DM |
2280 | #define CHRTEST_UNINIT -1001 /* c1/c2 haven't been calculated yet */ |
2281 | #define CHRTEST_VOID -1000 /* the c1/c2 "next char" test should be skipped */ | |
9e137952 | 2282 | |
86545054 DM |
2283 | #define SLAB_FIRST(s) (&(s)->states[0]) |
2284 | #define SLAB_LAST(s) (&(s)->states[PERL_REGMATCH_SLAB_SLOTS-1]) | |
2285 | ||
5d9a96ca DM |
2286 | /* grab a new slab and return the first slot in it */ |
2287 | ||
2288 | STATIC regmatch_state * | |
2289 | S_push_slab(pTHX) | |
2290 | { | |
54df2634 NC |
2291 | #if PERL_VERSION < 9 |
2292 | dMY_CXT; | |
2293 | #endif | |
5d9a96ca DM |
2294 | regmatch_slab *s = PL_regmatch_slab->next; |
2295 | if (!s) { | |
2296 | Newx(s, 1, regmatch_slab); | |
2297 | s->prev = PL_regmatch_slab; | |
2298 | s->next = NULL; | |
2299 | PL_regmatch_slab->next = s; | |
2300 | } | |
2301 | PL_regmatch_slab = s; | |
86545054 | 2302 | return SLAB_FIRST(s); |
5d9a96ca | 2303 | } |
5b47454d | 2304 | |
95b24440 | 2305 | |
40a82448 DM |
2306 | /* push a new state then goto it */ |
2307 | ||
2308 | #define PUSH_STATE_GOTO(state, node) \ | |
2309 | scan = node; \ | |
2310 | st->resume_state = state; \ | |
2311 | goto push_state; | |
2312 | ||
2313 | /* push a new state with success backtracking, then goto it */ | |
2314 | ||
2315 | #define PUSH_YES_STATE_GOTO(state, node) \ | |
2316 | scan = node; \ | |
2317 | st->resume_state = state; \ | |
2318 | goto push_yes_state; | |
2319 | ||
aa283a38 | 2320 | |
aa283a38 | 2321 | |
d6a28714 | 2322 | /* |
95b24440 | 2323 | |
bf1f174e DM |
2324 | regmatch() - main matching routine |
2325 | ||
2326 | This is basically one big switch statement in a loop. We execute an op, | |
2327 | set 'next' to point the next op, and continue. If we come to a point which | |
2328 | we may need to backtrack to on failure such as (A|B|C), we push a | |
2329 | backtrack state onto the backtrack stack. On failure, we pop the top | |
2330 | state, and re-enter the loop at the state indicated. If there are no more | |
2331 | states to pop, we return failure. | |
2332 | ||
2333 | Sometimes we also need to backtrack on success; for example /A+/, where | |
2334 | after successfully matching one A, we need to go back and try to | |
2335 | match another one; similarly for lookahead assertions: if the assertion | |
2336 | completes successfully, we backtrack to the state just before the assertion | |
2337 | and then carry on. In these cases, the pushed state is marked as | |
2338 | 'backtrack on success too'. This marking is in fact done by a chain of | |
2339 | pointers, each pointing to the previous 'yes' state. On success, we pop to | |
2340 | the nearest yes state, discarding any intermediate failure-only states. | |
2341 | Sometimes a yes state is pushed just to force some cleanup code to be | |
2342 | called at the end of a successful match or submatch; e.g. (??{$re}) uses | |
2343 | it to free the inner regex. | |
2344 | ||
2345 | Note that failure backtracking rewinds the cursor position, while | |
2346 | success backtracking leaves it alone. | |
2347 | ||
2348 | A pattern is complete when the END op is executed, while a subpattern | |
2349 | such as (?=foo) is complete when the SUCCESS op is executed. Both of these | |
2350 | ops trigger the "pop to last yes state if any, otherwise return true" | |
2351 | behaviour. | |
2352 | ||
2353 | A common convention in this function is to use A and B to refer to the two | |
2354 | subpatterns (or to the first nodes thereof) in patterns like /A*B/: so A is | |
2355 | the subpattern to be matched possibly multiple times, while B is the entire | |
2356 | rest of the pattern. Variable and state names reflect this convention. | |
2357 | ||
2358 | The states in the main switch are the union of ops and failure/success of | |
2359 | substates associated with with that op. For example, IFMATCH is the op | |
2360 | that does lookahead assertions /(?=A)B/ and so the IFMATCH state means | |
2361 | 'execute IFMATCH'; while IFMATCH_A is a state saying that we have just | |
2362 | successfully matched A and IFMATCH_A_fail is a state saying that we have | |
2363 | just failed to match A. Resume states always come in pairs. The backtrack | |
2364 | state we push is marked as 'IFMATCH_A', but when that is popped, we resume | |
2365 | at IFMATCH_A or IFMATCH_A_fail, depending on whether we are backtracking | |
2366 | on success or failure. | |
2367 | ||
2368 | The struct that holds a backtracking state is actually a big union, with | |
2369 | one variant for each major type of op. The variable st points to the | |
2370 | top-most backtrack struct. To make the code clearer, within each | |
2371 | block of code we #define ST to alias the relevant union. | |
2372 | ||
2373 | Here's a concrete example of a (vastly oversimplified) IFMATCH | |
2374 | implementation: | |
2375 | ||
2376 | switch (state) { | |
2377 | .... | |
2378 | ||
2379 | #define ST st->u.ifmatch | |
2380 | ||
2381 | case IFMATCH: // we are executing the IFMATCH op, (?=A)B | |
2382 | ST.foo = ...; // some state we wish to save | |
95b24440 | 2383 | ... |
bf1f174e DM |
2384 | // push a yes backtrack state with a resume value of |
2385 | // IFMATCH_A/IFMATCH_A_fail, then continue execution at the | |
2386 | // first node of A: | |
2387 | PUSH_YES_STATE_GOTO(IFMATCH_A, A); | |
2388 | // NOTREACHED | |
2389 | ||
2390 | case IFMATCH_A: // we have successfully executed A; now continue with B | |
2391 | next = B; | |
2392 | bar = ST.foo; // do something with the preserved value | |
2393 | break; | |
2394 | ||
2395 | case IFMATCH_A_fail: // A failed, so the assertion failed | |
2396 | ...; // do some housekeeping, then ... | |
2397 | sayNO; // propagate the failure | |
2398 | ||
2399 | #undef ST | |
95b24440 | 2400 | |
bf1f174e DM |
2401 | ... |
2402 | } | |
95b24440 | 2403 | |
bf1f174e DM |
2404 | For any old-timers reading this who are familiar with the old recursive |
2405 | approach, the code above is equivalent to: | |
95b24440 | 2406 | |
bf1f174e DM |
2407 | case IFMATCH: // we are executing the IFMATCH op, (?=A)B |
2408 | { | |
2409 | int foo = ... | |
95b24440 | 2410 | ... |
bf1f174e DM |
2411 | if (regmatch(A)) { |
2412 | next = B; | |
2413 | bar = foo; | |
2414 | break; | |
95b24440 | 2415 | } |
bf1f174e DM |
2416 | ...; // do some housekeeping, then ... |
2417 | sayNO; // propagate the failure | |
95b24440 | 2418 | } |
bf1f174e DM |
2419 | |
2420 | The topmost backtrack state, pointed to by st, is usually free. If you | |
2421 | want to claim it, populate any ST.foo fields in it with values you wish to | |
2422 | save, then do one of | |
2423 | ||
2424 | PUSH_STATE_GOTO(resume_state, node); | |
2425 | PUSH_YES_STATE_GOTO(resume_state, node); | |
2426 | ||
2427 | which sets that backtrack state's resume value to 'resume_state', pushes a | |
2428 | new free entry to the top of the backtrack stack, then goes to 'node'. | |
2429 | On backtracking, the free slot is popped, and the saved state becomes the | |
2430 | new free state. An ST.foo field in this new top state can be temporarily | |
2431 | accessed to retrieve values, but once the main loop is re-entered, it | |
2432 | becomes available for reuse. | |
2433 | ||
2434 | Note that the depth of the backtrack stack constantly increases during the | |
2435 | left-to-right execution of the pattern, rather than going up and down with | |
2436 | the pattern nesting. For example the stack is at its maximum at Z at the | |
2437 | end of the pattern, rather than at X in the following: | |
2438 | ||
2439 | /(((X)+)+)+....(Y)+....Z/ | |
2440 | ||
2441 | The only exceptions to this are lookahead/behind assertions and the cut, | |
2442 | (?>A), which pop all the backtrack states associated with A before | |
2443 | continuing. | |
2444 | ||
2445 | Bascktrack state structs are allocated in slabs of about 4K in size. | |
2446 | PL_regmatch_state and st always point to the currently active state, | |
2447 | and PL_regmatch_slab points to the slab currently containing | |
2448 | PL_regmatch_state. The first time regmatch() is called, the first slab is | |
2449 | allocated, and is never freed until interpreter destruction. When the slab | |
2450 | is full, a new one is allocated and chained to the end. At exit from | |
2451 | regmatch(), slabs allocated since entry are freed. | |
2452 | ||
2453 | */ | |
95b24440 | 2454 | |
40a82448 | 2455 | |
5bc10b2c | 2456 | #define DEBUG_STATE_pp(pp) \ |
265c4333 | 2457 | DEBUG_STATE_r({ \ |
5bc10b2c DM |
2458 | DUMP_EXEC_POS(locinput, scan, do_utf8); \ |
2459 | PerlIO_printf(Perl_debug_log, \ | |
5d458dd8 | 2460 | " %*s"pp" %s%s%s%s%s\n", \ |
5bc10b2c | 2461 | depth*2, "", \ |
5d458dd8 YO |
2462 | reg_name[st->resume_state], \ |
2463 | ((st==yes_state||st==mark_state) ? "[" : ""), \ | |
2464 | ((st==yes_state) ? "Y" : ""), \ | |
2465 | ((st==mark_state) ? "M" : ""), \ | |
2466 | ((st==yes_state||st==mark_state) ? "]" : "") \ | |
2467 | ); \ | |
265c4333 | 2468 | }); |
5bc10b2c | 2469 | |
40a82448 | 2470 | |
3dab1dad | 2471 | #define REG_NODE_NUM(x) ((x) ? (int)((x)-prog) : -1) |
95b24440 | 2472 | |
3df15adc | 2473 | #ifdef DEBUGGING |
5bc10b2c | 2474 | |
ab3bbdeb YO |
2475 | STATIC void |
2476 | S_debug_start_match(pTHX_ const regexp *prog, const bool do_utf8, | |
2477 | const char *start, const char *end, const char *blurb) | |
2478 | { | |
bbe252da | 2479 | const bool utf8_pat= prog->extflags & RXf_UTF8 ? 1 : 0; |
ab3bbdeb YO |
2480 | if (!PL_colorset) |
2481 | reginitcolors(); | |
2482 | { | |
2483 | RE_PV_QUOTED_DECL(s0, utf8_pat, PERL_DEBUG_PAD_ZERO(0), | |
2484 | prog->precomp, prog->prelen, 60); | |
2485 | ||
2486 | RE_PV_QUOTED_DECL(s1, do_utf8, PERL_DEBUG_PAD_ZERO(1), | |
2487 | start, end - start, 60); | |
2488 | ||
2489 | PerlIO_printf(Perl_debug_log, | |
2490 | "%s%s REx%s %s against %s\n", | |
2491 | PL_colors[4], blurb, PL_colors[5], s0, s1); | |
2492 | ||
2493 | if (do_utf8||utf8_pat) | |
1de06328 YO |
2494 | PerlIO_printf(Perl_debug_log, "UTF-8 %s%s%s...\n", |
2495 | utf8_pat ? "pattern" : "", | |
2496 | utf8_pat && do_utf8 ? " and " : "", | |
2497 | do_utf8 ? "string" : "" | |
ab3bbdeb YO |
2498 | ); |
2499 | } | |
2500 | } | |
3df15adc YO |
2501 | |
2502 | STATIC void | |
786e8c11 YO |
2503 | S_dump_exec_pos(pTHX_ const char *locinput, |
2504 | const regnode *scan, | |
2505 | const char *loc_regeol, | |
2506 | const char *loc_bostr, | |
2507 | const char *loc_reg_starttry, | |
2508 | const bool do_utf8) | |
07be1b83 | 2509 | { |
786e8c11 | 2510 | const int docolor = *PL_colors[0] || *PL_colors[2] || *PL_colors[4]; |
07be1b83 | 2511 | const int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */ |
786e8c11 | 2512 | int l = (loc_regeol - locinput) > taill ? taill : (loc_regeol - locinput); |
07be1b83 YO |
2513 | /* The part of the string before starttry has one color |
2514 | (pref0_len chars), between starttry and current | |
2515 | position another one (pref_len - pref0_len chars), | |
2516 | after the current position the third one. | |
2517 | We assume that pref0_len <= pref_len, otherwise we | |
2518 | decrease pref0_len. */ | |
786e8c11 YO |
2519 | int pref_len = (locinput - loc_bostr) > (5 + taill) - l |
2520 | ? (5 + taill) - l : locinput - loc_bostr; | |
07be1b83 YO |
2521 | int pref0_len; |
2522 | ||
2523 | while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len))) | |
2524 | pref_len++; | |
786e8c11 YO |
2525 | pref0_len = pref_len - (locinput - loc_reg_starttry); |
2526 | if (l + pref_len < (5 + taill) && l < loc_regeol - locinput) | |
2527 | l = ( loc_regeol - locinput > (5 + taill) - pref_len | |
2528 | ? (5 + taill) - pref_len : loc_regeol - locinput); | |
07be1b83 YO |
2529 | while (do_utf8 && UTF8_IS_CONTINUATION(*(U8*)(locinput + l))) |
2530 | l--; | |
2531 | if (pref0_len < 0) | |
2532 | pref0_len = 0; | |
2533 | if (pref0_len > pref_len) | |
2534 | pref0_len = pref_len; | |
2535 | { | |
3df15adc | 2536 | const int is_uni = (do_utf8 && OP(scan) != CANY) ? 1 : 0; |
0df25f3d | 2537 | |
ab3bbdeb | 2538 | RE_PV_COLOR_DECL(s0,len0,is_uni,PERL_DEBUG_PAD(0), |
1de06328 | 2539 | (locinput - pref_len),pref0_len, 60, 4, 5); |
0df25f3d | 2540 | |
ab3bbdeb | 2541 | RE_PV_COLOR_DECL(s1,len1,is_uni,PERL_DEBUG_PAD(1), |
3df15adc | 2542 | (locinput - pref_len + pref0_len), |
1de06328 | 2543 | pref_len - pref0_len, 60, 2, 3); |
0df25f3d | 2544 | |
ab3bbdeb | 2545 | RE_PV_COLOR_DECL(s2,len2,is_uni,PERL_DEBUG_PAD(2), |
1de06328 | 2546 | locinput, loc_regeol - locinput, 10, 0, 1); |
0df25f3d | 2547 | |
1de06328 | 2548 | const STRLEN tlen=len0+len1+len2; |
3df15adc | 2549 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb | 2550 | "%4"IVdf" <%.*s%.*s%s%.*s>%*s|", |
786e8c11 | 2551 | (IV)(locinput - loc_bostr), |
07be1b83 | 2552 | len0, s0, |
07be1b83 | 2553 | len1, s1, |
07be1b83 | 2554 | (docolor ? "" : "> <"), |
07be1b83 | 2555 | len2, s2, |
f9f4320a | 2556 | (int)(tlen > 19 ? 0 : 19 - tlen), |
07be1b83 YO |
2557 | ""); |
2558 | } | |
2559 | } | |
3df15adc | 2560 | |
07be1b83 YO |
2561 | #endif |
2562 | ||
0a4db386 YO |
2563 | /* reg_check_named_buff_matched() |
2564 | * Checks to see if a named buffer has matched. The data array of | |
2565 | * buffer numbers corresponding to the buffer is expected to reside | |
2566 | * in the regexp->data->data array in the slot stored in the ARG() of | |
2567 | * node involved. Note that this routine doesn't actually care about the | |
2568 | * name, that information is not preserved from compilation to execution. | |
2569 | * Returns the index of the leftmost defined buffer with the given name | |
2570 | * or 0 if non of the buffers matched. | |
2571 | */ | |
2572 | STATIC I32 | |
2573 | S_reg_check_named_buff_matched(pTHX_ const regexp *rex, const regnode *scan) { | |
2574 | I32 n; | |
f8fc2ecf YO |
2575 | RXi_GET_DECL(rex,rexi); |
2576 | SV *sv_dat=(SV*)rexi->data->data[ ARG( scan ) ]; | |
0a4db386 YO |
2577 | I32 *nums=(I32*)SvPVX(sv_dat); |
2578 | for ( n=0; n<SvIVX(sv_dat); n++ ) { | |
2579 | if ((I32)*PL_reglastparen >= nums[n] && | |
2580 | PL_regendp[nums[n]] != -1) | |
2581 | { | |
2582 | return nums[n]; | |
2583 | } | |
2584 | } | |
2585 | return 0; | |
2586 | } | |
2587 | ||
d6a28714 | 2588 | STATIC I32 /* 0 failure, 1 success */ |
24b23f37 | 2589 | S_regmatch(pTHX_ regmatch_info *reginfo, regnode *prog) |
d6a28714 | 2590 | { |
54df2634 NC |
2591 | #if PERL_VERSION < 9 |
2592 | dMY_CXT; | |
2593 | #endif | |
27da23d5 | 2594 | dVAR; |
95b24440 | 2595 | register const bool do_utf8 = PL_reg_match_utf8; |
4ad0818d | 2596 | const U32 uniflags = UTF8_ALLOW_DEFAULT; |
95b24440 | 2597 | |
3b0527fe | 2598 | regexp *rex = reginfo->prog; |
f8fc2ecf YO |
2599 | RXi_GET_DECL(rex,rexi); |
2600 | ||
5d9a96ca DM |
2601 | regmatch_slab *orig_slab; |
2602 | regmatch_state *orig_state; | |
a3621e74 | 2603 | |
5d9a96ca DM |
2604 | /* the current state. This is a cached copy of PL_regmatch_state */ |
2605 | register regmatch_state *st; | |
95b24440 | 2606 | |
5d9a96ca DM |
2607 | /* cache heavy used fields of st in registers */ |
2608 | register regnode *scan; | |
2609 | register regnode *next; | |
438e9bae | 2610 | register U32 n = 0; /* general value; init to avoid compiler warning */ |
24d3c4a9 | 2611 | register I32 ln = 0; /* len or last; init to avoid compiler warning */ |
5d9a96ca | 2612 | register char *locinput = PL_reginput; |
5d9a96ca | 2613 | register I32 nextchr; /* is always set to UCHARAT(locinput) */ |
24d3c4a9 | 2614 | |
b69b0499 | 2615 | bool result = 0; /* return value of S_regmatch */ |
24d3c4a9 | 2616 | int depth = 0; /* depth of backtrack stack */ |
1a147d38 | 2617 | int nochange_depth = 0; /* depth of GOSUB recursion with nochange*/ |
77cb431f DM |
2618 | regmatch_state *yes_state = NULL; /* state to pop to on success of |
2619 | subpattern */ | |
e2e6a0f1 YO |
2620 | /* mark_state piggy backs on the yes_state logic so that when we unwind |
2621 | the stack on success we can update the mark_state as we go */ | |
2622 | regmatch_state *mark_state = NULL; /* last mark state we have seen */ | |
5d458dd8 | 2623 | |
faec1544 | 2624 | regmatch_state *cur_eval = NULL; /* most recent EVAL_AB state */ |
b8591aee | 2625 | struct regmatch_state *cur_curlyx = NULL; /* most recent curlyx */ |
40a82448 | 2626 | U32 state_num; |
5d458dd8 YO |
2627 | bool no_final = 0; /* prevent failure from backtracking? */ |
2628 | bool do_cutgroup = 0; /* no_final only until next branch/trie entry */ | |
e2e6a0f1 | 2629 | char *startpoint = PL_reginput; |
5d458dd8 YO |
2630 | SV *popmark = NULL; /* are we looking for a mark? */ |
2631 | SV *sv_commit = NULL; /* last mark name seen in failure */ | |
2632 | SV *sv_yes_mark = NULL; /* last mark name we have seen | |
2633 | during a successfull match */ | |
2634 | U32 lastopen = 0; /* last open we saw */ | |
2635 | bool has_cutgroup = RX_HAS_CUTGROUP(rex) ? 1 : 0; | |
58e23c8d | 2636 | |
5d458dd8 | 2637 | |
24d3c4a9 DM |
2638 | /* these three flags are set by various ops to signal information to |
2639 | * the very next op. They have a useful lifetime of exactly one loop | |
2640 | * iteration, and are not preserved or restored by state pushes/pops | |
2641 | */ | |
2642 | bool sw = 0; /* the condition value in (?(cond)a|b) */ | |
2643 | bool minmod = 0; /* the next "{n,m}" is a "{n,m}?" */ | |
2644 | int logical = 0; /* the following EVAL is: | |
2645 | 0: (?{...}) | |
2646 | 1: (?(?{...})X|Y) | |
2647 | 2: (??{...}) | |
2648 | or the following IFMATCH/UNLESSM is: | |
2649 | false: plain (?=foo) | |
2650 | true: used as a condition: (?(?=foo)) | |
2651 | */ | |
2652 | ||
95b24440 | 2653 | #ifdef DEBUGGING |
e68ec53f | 2654 | GET_RE_DEBUG_FLAGS_DECL; |
d6a28714 JH |
2655 | #endif |
2656 | ||
58e23c8d | 2657 | DEBUG_OPTIMISE_r( { |
24b23f37 YO |
2658 | PerlIO_printf(Perl_debug_log,"regmatch start\n"); |
2659 | }); | |
5d9a96ca DM |
2660 | /* on first ever call to regmatch, allocate first slab */ |
2661 | if (!PL_regmatch_slab) { | |
2662 | Newx(PL_regmatch_slab, 1, regmatch_slab); | |
2663 | PL_regmatch_slab->prev = NULL; | |
2664 | PL_regmatch_slab->next = NULL; | |
86545054 | 2665 | PL_regmatch_state = SLAB_FIRST(PL_regmatch_slab); |
5d9a96ca DM |
2666 | } |
2667 | ||
2668 | /* remember current high-water mark for exit */ | |
2669 | /* XXX this should be done with SAVE* instead */ | |
2670 | orig_slab = PL_regmatch_slab; | |
2671 | orig_state = PL_regmatch_state; | |
2672 | ||
2673 | /* grab next free state slot */ | |
2674 | st = ++PL_regmatch_state; | |
86545054 | 2675 | if (st > SLAB_LAST(PL_regmatch_slab)) |
5d9a96ca DM |
2676 | st = PL_regmatch_state = S_push_slab(aTHX); |
2677 | ||
d6a28714 JH |
2678 | /* Note that nextchr is a byte even in UTF */ |
2679 | nextchr = UCHARAT(locinput); | |
2680 | scan = prog; | |
2681 | while (scan != NULL) { | |
8ba1375e | 2682 | |
a3621e74 | 2683 | DEBUG_EXECUTE_r( { |
6136c704 | 2684 | SV * const prop = sv_newmortal(); |
1de06328 | 2685 | regnode *rnext=regnext(scan); |
786e8c11 | 2686 | DUMP_EXEC_POS( locinput, scan, do_utf8 ); |
32fc9b6a | 2687 | regprop(rex, prop, scan); |
07be1b83 YO |
2688 | |
2689 | PerlIO_printf(Perl_debug_log, | |
2690 | "%3"IVdf":%*s%s(%"IVdf")\n", | |
f8fc2ecf | 2691 | (IV)(scan - rexi->program), depth*2, "", |
07be1b83 | 2692 | SvPVX_const(prop), |
1de06328 | 2693 | (PL_regkind[OP(scan)] == END || !rnext) ? |
f8fc2ecf | 2694 | 0 : (IV)(rnext - rexi->program)); |
2a782b5b | 2695 | }); |
d6a28714 JH |
2696 | |
2697 | next = scan + NEXT_OFF(scan); | |
2698 | if (next == scan) | |
2699 | next = NULL; | |
40a82448 | 2700 | state_num = OP(scan); |
d6a28714 | 2701 | |
40a82448 DM |
2702 | reenter_switch: |
2703 | switch (state_num) { | |
d6a28714 | 2704 | case BOL: |
7fba1cd6 | 2705 | if (locinput == PL_bostr) |
d6a28714 | 2706 | { |
3b0527fe | 2707 | /* reginfo->till = reginfo->bol; */ |
b8c5462f JH |
2708 | break; |
2709 | } | |
d6a28714 JH |
2710 | sayNO; |
2711 | case MBOL: | |
12d33761 HS |
2712 | if (locinput == PL_bostr || |
2713 | ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n')) | |
d6a28714 | 2714 | { |
b8c5462f JH |
2715 | break; |
2716 | } | |
d6a28714 JH |
2717 | sayNO; |
2718 | case SBOL: | |
c2a73568 | 2719 | if (locinput == PL_bostr) |
b8c5462f | 2720 | break; |
d6a28714 JH |
2721 | sayNO; |
2722 | case GPOS: | |
3b0527fe | 2723 | if (locinput == reginfo->ganch) |
d6a28714 JH |
2724 | break; |
2725 | sayNO; | |
2726 | case EOL: | |
d6a28714 JH |
2727 | goto seol; |
2728 | case MEOL: | |
d6a28714 | 2729 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') |
b8c5462f | 2730 | sayNO; |
b8c5462f | 2731 | break; |
d6a28714 JH |
2732 | case SEOL: |
2733 | seol: | |
2734 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') | |
b8c5462f | 2735 | sayNO; |
d6a28714 | 2736 | if (PL_regeol - locinput > 1) |
b8c5462f | 2737 | sayNO; |
b8c5462f | 2738 | break; |
d6a28714 JH |
2739 | case EOS: |
2740 | if (PL_regeol != locinput) | |
b8c5462f | 2741 | sayNO; |
d6a28714 | 2742 | break; |
ffc61ed2 | 2743 | case SANY: |
d6a28714 | 2744 | if (!nextchr && locinput >= PL_regeol) |
4633a7c4 | 2745 | sayNO; |
f33976b4 DB |
2746 | if (do_utf8) { |
2747 | locinput += PL_utf8skip[nextchr]; | |
2748 | if (locinput > PL_regeol) | |
2749 | sayNO; | |
2750 | nextchr = UCHARAT(locinput); | |
2751 | } | |
2752 | else | |
2753 | nextchr = UCHARAT(++locinput); | |
2754 | break; | |
2755 | case CANY: | |
2756 | if (!nextchr && locinput >= PL_regeol) | |
2757 | sayNO; | |
b8c5462f | 2758 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 2759 | break; |
ffc61ed2 | 2760 | case REG_ANY: |
1aa99e6b IH |
2761 | if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n') |
2762 | sayNO; | |
2763 | if (do_utf8) { | |
b8c5462f | 2764 | locinput += PL_utf8skip[nextchr]; |
d6a28714 JH |
2765 | if (locinput > PL_regeol) |
2766 | sayNO; | |
a0ed51b3 | 2767 | nextchr = UCHARAT(locinput); |
a0ed51b3 | 2768 | } |
1aa99e6b IH |
2769 | else |
2770 | nextchr = UCHARAT(++locinput); | |
a0ed51b3 | 2771 | break; |
166ba7cd DM |
2772 | |
2773 | #undef ST | |
2774 | #define ST st->u.trie | |
786e8c11 YO |
2775 | case TRIEC: |
2776 | /* In this case the charclass data is available inline so | |
2777 | we can fail fast without a lot of extra overhead. | |
2778 | */ | |
2779 | if (scan->flags == EXACT || !do_utf8) { | |
2780 | if(!ANYOF_BITMAP_TEST(scan, *locinput)) { | |
2781 | DEBUG_EXECUTE_r( | |
2782 | PerlIO_printf(Perl_debug_log, | |
2783 | "%*s %sfailed to match trie start class...%s\n", | |
5bc10b2c | 2784 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]) |
786e8c11 YO |
2785 | ); |
2786 | sayNO_SILENT; | |
2787 | /* NOTREACHED */ | |
2788 | } | |
2789 | } | |
2790 | /* FALL THROUGH */ | |
5b47454d | 2791 | case TRIE: |
3dab1dad | 2792 | { |
07be1b83 | 2793 | /* what type of TRIE am I? (utf8 makes this contextual) */ |
3dab1dad YO |
2794 | const enum { trie_plain, trie_utf8, trie_utf8_fold } |
2795 | trie_type = do_utf8 ? | |
2796 | (scan->flags == EXACT ? trie_utf8 : trie_utf8_fold) | |
2797 | : trie_plain; | |
2798 | ||
2799 | /* what trie are we using right now */ | |
be8e71aa | 2800 | reg_trie_data * const trie |
f8fc2ecf | 2801 | = (reg_trie_data*)rexi->data->data[ ARG( scan ) ]; |
3dab1dad | 2802 | U32 state = trie->startstate; |
166ba7cd | 2803 | |
3dab1dad YO |
2804 | if (trie->bitmap && trie_type != trie_utf8_fold && |
2805 | !TRIE_BITMAP_TEST(trie,*locinput) | |
2806 | ) { | |
2807 | if (trie->states[ state ].wordnum) { | |
2808 | DEBUG_EXECUTE_r( | |
2809 | PerlIO_printf(Perl_debug_log, | |
2810 | "%*s %smatched empty string...%s\n", | |
5bc10b2c | 2811 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]) |
3dab1dad YO |
2812 | ); |
2813 | break; | |
2814 | } else { | |
2815 | DEBUG_EXECUTE_r( | |
2816 | PerlIO_printf(Perl_debug_log, | |
786e8c11 | 2817 | "%*s %sfailed to match trie start class...%s\n", |
5bc10b2c | 2818 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5]) |
3dab1dad YO |
2819 | ); |
2820 | sayNO_SILENT; | |
2821 | } | |
2822 | } | |
166ba7cd | 2823 | |
786e8c11 YO |
2824 | { |
2825 | U8 *uc = ( U8* )locinput; | |
2826 | ||
2827 | STRLEN len = 0; | |
2828 | STRLEN foldlen = 0; | |
2829 | U8 *uscan = (U8*)NULL; | |
2830 | STRLEN bufflen=0; | |
2831 | SV *sv_accept_buff = NULL; | |
2832 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; | |
2833 | ||
2834 | ST.accepted = 0; /* how many accepting states we have seen */ | |
2835 | ST.B = next; | |
2836 | ST.jump = trie->jump; | |
786e8c11 | 2837 | ST.me = scan; |
786e8c11 | 2838 | |
07be1b83 YO |
2839 | /* |
2840 | traverse the TRIE keeping track of all accepting states | |
2841 | we transition through until we get to a failing node. | |
2842 | */ | |
2843 | ||
a3621e74 | 2844 | while ( state && uc <= (U8*)PL_regeol ) { |
786e8c11 | 2845 | U32 base = trie->states[ state ].trans.base; |
f9f4320a | 2846 | UV uvc = 0; |
786e8c11 YO |
2847 | U16 charid; |
2848 | /* We use charid to hold the wordnum as we don't use it | |
2849 | for charid until after we have done the wordnum logic. | |
2850 | We define an alias just so that the wordnum logic reads | |
2851 | more naturally. */ | |
2852 | ||
2853 | #define got_wordnum charid | |
2854 | got_wordnum = trie->states[ state ].wordnum; | |
2855 | ||
2856 | if ( got_wordnum ) { | |
2857 | if ( ! ST.accepted ) { | |
5b47454d DM |
2858 | ENTER; |
2859 | SAVETMPS; | |
2860 | bufflen = TRIE_INITAL_ACCEPT_BUFFLEN; | |
2861 | sv_accept_buff=newSV(bufflen * | |
2862 | sizeof(reg_trie_accepted) - 1); | |
786e8c11 | 2863 | SvCUR_set(sv_accept_buff, 0); |
5b47454d DM |
2864 | SvPOK_on(sv_accept_buff); |
2865 | sv_2mortal(sv_accept_buff); | |
166ba7cd DM |
2866 | SAVETMPS; |
2867 | ST.accept_buff = | |
5b47454d DM |
2868 | (reg_trie_accepted*)SvPV_nolen(sv_accept_buff ); |
2869 | } | |
786e8c11 | 2870 | do { |
166ba7cd | 2871 | if (ST.accepted >= bufflen) { |
5b47454d | 2872 | bufflen *= 2; |
166ba7cd | 2873 | ST.accept_buff =(reg_trie_accepted*) |
5b47454d DM |
2874 | SvGROW(sv_accept_buff, |
2875 | bufflen * sizeof(reg_trie_accepted)); | |
2876 | } | |
2877 | SvCUR_set(sv_accept_buff,SvCUR(sv_accept_buff) | |
2878 | + sizeof(reg_trie_accepted)); | |
a3621e74 | 2879 | |
786e8c11 YO |
2880 | |
2881 | ST.accept_buff[ST.accepted].wordnum = got_wordnum; | |
2882 | ST.accept_buff[ST.accepted].endpos = uc; | |
2883 | ++ST.accepted; | |
2884 | } while (trie->nextword && (got_wordnum= trie->nextword[got_wordnum])); | |
2885 | } | |
2886 | #undef got_wordnum | |
a3621e74 | 2887 | |
07be1b83 | 2888 | DEBUG_TRIE_EXECUTE_r({ |
786e8c11 | 2889 | DUMP_EXEC_POS( (char *)uc, scan, do_utf8 ); |
a3621e74 | 2890 | PerlIO_printf( Perl_debug_log, |
786e8c11 | 2891 | "%*s %sState: %4"UVxf" Accepted: %4"UVxf" ", |
5bc10b2c | 2892 | 2+depth * 2, "", PL_colors[4], |
786e8c11 | 2893 | (UV)state, (UV)ST.accepted ); |
07be1b83 | 2894 | }); |
a3621e74 YO |
2895 | |
2896 | if ( base ) { | |
4cadc6a9 YO |
2897 | REXEC_TRIE_READ_CHAR(trie_type, trie, uc, uscan, len, |
2898 | uvc, charid, foldlen, foldbuf, uniflags); | |
a3621e74 | 2899 | |
5b47454d DM |
2900 | if (charid && |
2901 | (base + charid > trie->uniquecharcount ) | |
2902 | && (base + charid - 1 - trie->uniquecharcount | |
2903 | < trie->lasttrans) | |
2904 | && trie->trans[base + charid - 1 - | |
2905 | trie->uniquecharcount].check == state) | |
2906 | { | |
2907 | state = trie->trans[base + charid - 1 - | |
2908 | trie->uniquecharcount ].next; | |
2909 | } | |
2910 | else { | |
2911 | state = 0; | |
2912 | } | |
2913 | uc += len; | |
2914 | ||
2915 | } | |
2916 | else { | |
a3621e74 YO |
2917 | state = 0; |
2918 | } | |
2919 | DEBUG_TRIE_EXECUTE_r( | |
e4584336 | 2920 | PerlIO_printf( Perl_debug_log, |
786e8c11 | 2921 | "Charid:%3x CP:%4"UVxf" After State: %4"UVxf"%s\n", |
e4584336 | 2922 | charid, uvc, (UV)state, PL_colors[5] ); |
a3621e74 YO |
2923 | ); |
2924 | } | |
166ba7cd | 2925 | if (!ST.accepted ) |
a3621e74 | 2926 | sayNO; |
a3621e74 | 2927 | |
166ba7cd DM |
2928 | DEBUG_EXECUTE_r( |
2929 | PerlIO_printf( Perl_debug_log, | |
2930 | "%*s %sgot %"IVdf" possible matches%s\n", | |
5bc10b2c | 2931 | REPORT_CODE_OFF + depth * 2, "", |
166ba7cd DM |
2932 | PL_colors[4], (IV)ST.accepted, PL_colors[5] ); |
2933 | ); | |
786e8c11 | 2934 | }} |
166ba7cd DM |
2935 | |
2936 | /* FALL THROUGH */ | |
166ba7cd | 2937 | case TRIE_next_fail: /* we failed - try next alterative */ |
5d458dd8 YO |
2938 | if (do_cutgroup) { |
2939 | do_cutgroup = 0; | |
2940 | no_final = 0; | |
2941 | } | |
166ba7cd DM |
2942 | if ( ST.accepted == 1 ) { |
2943 | /* only one choice left - just continue */ | |
2944 | DEBUG_EXECUTE_r({ | |
2945 | reg_trie_data * const trie | |
f8fc2ecf | 2946 | = (reg_trie_data*)rexi->data->data[ ARG(ST.me) ]; |
5c9f2f80 YO |
2947 | SV ** const tmp = av_fetch( trie->words, |
2948 | ST.accept_buff[ 0 ].wordnum-1, 0 ); | |
de734bd5 A |
2949 | SV *sv= tmp ? sv_newmortal() : NULL; |
2950 | ||
166ba7cd DM |
2951 | PerlIO_printf( Perl_debug_log, |
2952 | "%*s %sonly one match left: #%d <%s>%s\n", | |
5bc10b2c | 2953 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], |
166ba7cd | 2954 | ST.accept_buff[ 0 ].wordnum, |
de734bd5 A |
2955 | tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0, |
2956 | PL_colors[0], PL_colors[1], | |
2957 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | |
2958 | ) | |
2959 | : "not compiled under -Dr", | |
166ba7cd DM |
2960 | PL_colors[5] ); |
2961 | }); | |
2962 | PL_reginput = (char *)ST.accept_buff[ 0 ].endpos; | |
2963 | /* in this case we free tmps/leave before we call regmatch | |
2964 | as we wont be using accept_buff again. */ | |
5d458dd8 | 2965 | |
166ba7cd DM |
2966 | locinput = PL_reginput; |
2967 | nextchr = UCHARAT(locinput); | |
5d458dd8 YO |
2968 | if ( !ST.jump || !ST.jump[ST.accept_buff[0].wordnum]) |
2969 | scan = ST.B; | |
2970 | else | |
2971 | scan = ST.me + ST.jump[ST.accept_buff[0].wordnum]; | |
2972 | if (!has_cutgroup) { | |
2973 | FREETMPS; | |
2974 | LEAVE; | |
2975 | } else { | |
2976 | ST.accepted--; | |
2977 | PUSH_YES_STATE_GOTO(TRIE_next, scan); | |
2978 | } | |
786e8c11 | 2979 | |
166ba7cd DM |
2980 | continue; /* execute rest of RE */ |
2981 | } | |
2982 | ||
2983 | if (!ST.accepted-- ) { | |
5d458dd8 YO |
2984 | DEBUG_EXECUTE_r({ |
2985 | PerlIO_printf( Perl_debug_log, | |
2986 | "%*s %sTRIE failed...%s\n", | |
2987 | REPORT_CODE_OFF+depth*2, "", | |
2988 | PL_colors[4], | |
2989 | PL_colors[5] ); | |
2990 | }); | |
166ba7cd DM |
2991 | FREETMPS; |
2992 | LEAVE; | |
5d458dd8 | 2993 | sayNO_SILENT; |
166ba7cd DM |
2994 | } |
2995 | ||
a3621e74 | 2996 | /* |
166ba7cd DM |
2997 | There are at least two accepting states left. Presumably |
2998 | the number of accepting states is going to be low, | |
2999 | typically two. So we simply scan through to find the one | |
3000 | with lowest wordnum. Once we find it, we swap the last | |
3001 | state into its place and decrement the size. We then try to | |
3002 | match the rest of the pattern at the point where the word | |
3003 | ends. If we succeed, control just continues along the | |
3004 | regex; if we fail we return here to try the next accepting | |
3005 | state | |
3006 | */ | |
a3621e74 | 3007 | |
166ba7cd DM |
3008 | { |
3009 | U32 best = 0; | |
3010 | U32 cur; | |
3011 | for( cur = 1 ; cur <= ST.accepted ; cur++ ) { | |
3012 | DEBUG_TRIE_EXECUTE_r( | |
f2278c82 | 3013 | PerlIO_printf( Perl_debug_log, |
166ba7cd | 3014 | "%*s %sgot %"IVdf" (%d) as best, looking at %"IVdf" (%d)%s\n", |
5bc10b2c | 3015 | REPORT_CODE_OFF + depth * 2, "", PL_colors[4], |
166ba7cd DM |
3016 | (IV)best, ST.accept_buff[ best ].wordnum, (IV)cur, |
3017 | ST.accept_buff[ cur ].wordnum, PL_colors[5] ); | |
3018 | ); | |
3019 | ||
3020 | if (ST.accept_buff[cur].wordnum < | |
3021 | ST.accept_buff[best].wordnum) | |
3022 | best = cur; | |
a3621e74 | 3023 | } |
166ba7cd DM |
3024 | |
3025 | DEBUG_EXECUTE_r({ | |
3026 | reg_trie_data * const trie | |
f8fc2ecf | 3027 | = (reg_trie_data*)rexi->data->data[ ARG(ST.me) ]; |
5c9f2f80 YO |
3028 | SV ** const tmp = av_fetch( trie->words, |
3029 | ST.accept_buff[ best ].wordnum - 1, 0 ); | |
7f69552c | 3030 | regnode *nextop=(!ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) ? |
265c4333 | 3031 | ST.B : |
7f69552c | 3032 | ST.me + ST.jump[ST.accept_buff[best].wordnum]; |
de734bd5 A |
3033 | SV *sv= tmp ? sv_newmortal() : NULL; |
3034 | ||
265c4333 YO |
3035 | PerlIO_printf( Perl_debug_log, |
3036 | "%*s %strying alternation #%d <%s> at node #%d %s\n", | |
5bc10b2c | 3037 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], |
166ba7cd | 3038 | ST.accept_buff[best].wordnum, |
de734bd5 A |
3039 | tmp ? pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 0, |
3040 | PL_colors[0], PL_colors[1], | |
3041 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | |
3042 | ) : "not compiled under -Dr", | |
265c4333 | 3043 | REG_NODE_NUM(nextop), |
166ba7cd DM |
3044 | PL_colors[5] ); |
3045 | }); | |
3046 | ||
3047 | if ( best<ST.accepted ) { | |
3048 | reg_trie_accepted tmp = ST.accept_buff[ best ]; | |
3049 | ST.accept_buff[ best ] = ST.accept_buff[ ST.accepted ]; | |
3050 | ST.accept_buff[ ST.accepted ] = tmp; | |
3051 | best = ST.accepted; | |
a3621e74 | 3052 | } |
166ba7cd | 3053 | PL_reginput = (char *)ST.accept_buff[ best ].endpos; |
7f69552c | 3054 | if ( !ST.jump || !ST.jump[ST.accept_buff[best].wordnum]) { |
5d458dd8 | 3055 | scan = ST.B; |
786e8c11 YO |
3056 | /* NOTREACHED */ |
3057 | } else { | |
5d458dd8 | 3058 | scan = ST.me + ST.jump[ST.accept_buff[best].wordnum]; |
786e8c11 YO |
3059 | /* NOTREACHED */ |
3060 | } | |
5d458dd8 YO |
3061 | if (has_cutgroup) { |
3062 | PUSH_YES_STATE_GOTO(TRIE_next, scan); | |
3063 | /* NOTREACHED */ | |
3064 | } else { | |
3065 | PUSH_STATE_GOTO(TRIE_next, scan); | |
3066 | /* NOTREACHED */ | |
3067 | } | |
786e8c11 | 3068 | /* NOTREACHED */ |
166ba7cd | 3069 | } |
166ba7cd | 3070 | /* NOTREACHED */ |
5d458dd8 YO |
3071 | case TRIE_next: |
3072 | FREETMPS; | |
3073 | LEAVE; | |
3074 | sayYES; | |
166ba7cd DM |
3075 | #undef ST |
3076 | ||
95b24440 DM |
3077 | case EXACT: { |
3078 | char *s = STRING(scan); | |
24d3c4a9 | 3079 | ln = STR_LEN(scan); |
eb160463 | 3080 | if (do_utf8 != UTF) { |
bc517b45 | 3081 | /* The target and the pattern have differing utf8ness. */ |
1aa99e6b | 3082 | char *l = locinput; |
24d3c4a9 | 3083 | const char * const e = s + ln; |
a72c7584 | 3084 | |
5ff6fc6d JH |
3085 | if (do_utf8) { |
3086 | /* The target is utf8, the pattern is not utf8. */ | |
1aa99e6b | 3087 | while (s < e) { |
a3b680e6 | 3088 | STRLEN ulen; |
1aa99e6b | 3089 | if (l >= PL_regeol) |
5ff6fc6d JH |
3090 | sayNO; |
3091 | if (NATIVE_TO_UNI(*(U8*)s) != | |
89ebb4a3 | 3092 | utf8n_to_uvuni((U8*)l, UTF8_MAXBYTES, &ulen, |
041457d9 | 3093 | uniflags)) |
5ff6fc6d | 3094 | sayNO; |
bc517b45 | 3095 | l += ulen; |
5ff6fc6d | 3096 | s ++; |
1aa99e6b | 3097 | } |
5ff6fc6d JH |
3098 | } |
3099 | else { | |
3100 | /* The target is not utf8, the pattern is utf8. */ | |
1aa99e6b | 3101 | while (s < e) { |
a3b680e6 | 3102 | STRLEN ulen; |
1aa99e6b IH |
3103 | if (l >= PL_regeol) |
3104 | sayNO; | |
5ff6fc6d | 3105 | if (NATIVE_TO_UNI(*((U8*)l)) != |
89ebb4a3 | 3106 | utf8n_to_uvuni((U8*)s, UTF8_MAXBYTES, &ulen, |
041457d9 | 3107 | uniflags)) |
1aa99e6b | 3108 | sayNO; |
bc517b45 | 3109 | s += ulen; |
a72c7584 | 3110 | l ++; |
1aa99e6b | 3111 | } |
5ff6fc6d | 3112 | } |
1aa99e6b IH |
3113 | locinput = l; |
3114 | nextchr = UCHARAT(locinput); | |
3115 | break; | |
3116 | } | |
bc517b45 | 3117 | /* The target and the pattern have the same utf8ness. */ |
d6a28714 JH |
3118 | /* Inline the first character, for speed. */ |
3119 | if (UCHARAT(s) != nextchr) | |
3120 | sayNO; | |
24d3c4a9 | 3121 | if (PL_regeol - locinput < ln) |
d6a28714 | 3122 | sayNO; |
24d3c4a9 | 3123 | if (ln > 1 && memNE(s, locinput, ln)) |
d6a28714 | 3124 | sayNO; |
24d3c4a9 | 3125 | locinput += ln; |
d6a28714 JH |
3126 | nextchr = UCHARAT(locinput); |
3127 | break; | |
95b24440 | 3128 | } |
d6a28714 | 3129 | case EXACTFL: |
b8c5462f JH |
3130 | PL_reg_flags |= RF_tainted; |
3131 | /* FALL THROUGH */ | |
95b24440 | 3132 | case EXACTF: { |
be8e71aa | 3133 | char * const s = STRING(scan); |
24d3c4a9 | 3134 | ln = STR_LEN(scan); |
d6a28714 | 3135 | |
d07ddd77 JH |
3136 | if (do_utf8 || UTF) { |
3137 | /* Either target or the pattern are utf8. */ | |
be8e71aa | 3138 | const char * const l = locinput; |
d07ddd77 | 3139 | char *e = PL_regeol; |
bc517b45 | 3140 | |
24d3c4a9 | 3141 | if (ibcmp_utf8(s, 0, ln, (bool)UTF, |
1feea2c7 | 3142 | l, &e, 0, do_utf8)) { |
5486206c JH |
3143 | /* One more case for the sharp s: |
3144 | * pack("U0U*", 0xDF) =~ /ss/i, | |
3145 | * the 0xC3 0x9F are the UTF-8 | |
3146 | * byte sequence for the U+00DF. */ | |
3147 | if (!(do_utf8 && | |
3148 | toLOWER(s[0]) == 's' && | |
24d3c4a9 | 3149 | ln >= 2 && |
5486206c JH |
3150 | toLOWER(s[1]) == 's' && |
3151 | (U8)l[0] == 0xC3 && | |
3152 | e - l >= 2 && | |
3153 | (U8)l[1] == 0x9F)) | |
3154 | sayNO; | |
3155 | } | |
d07ddd77 JH |
3156 | locinput = e; |
3157 | nextchr = UCHARAT(locinput); | |
3158 | break; | |
a0ed51b3 | 3159 | } |
d6a28714 | 3160 | |
bc517b45 JH |
3161 | /* Neither the target and the pattern are utf8. */ |
3162 | ||
d6a28714 JH |
3163 | /* Inline the first character, for speed. */ |
3164 | if (UCHARAT(s) != nextchr && | |
3165 | UCHARAT(s) != ((OP(scan) == EXACTF) | |
3166 | ? PL_fold : PL_fold_locale)[nextchr]) | |
a0ed51b3 | 3167 | sayNO; |
24d3c4a9 | 3168 | if (PL_regeol - locinput < ln) |
b8c5462f | 3169 | sayNO; |
24d3c4a9 DM |
3170 | if (ln > 1 && (OP(scan) == EXACTF |
3171 | ? ibcmp(s, locinput, ln) | |
3172 | : ibcmp_locale(s, locinput, ln))) | |
4633a7c4 | 3173 | sayNO; |
24d3c4a9 | 3174 | locinput += ln; |
d6a28714 | 3175 | nextchr = UCHARAT(locinput); |
a0d0e21e | 3176 | break; |
95b24440 | 3177 | } |
d6a28714 | 3178 | case ANYOF: |
ffc61ed2 | 3179 | if (do_utf8) { |
9e55ce06 JH |
3180 | STRLEN inclasslen = PL_regeol - locinput; |
3181 | ||
32fc9b6a | 3182 | if (!reginclass(rex, scan, (U8*)locinput, &inclasslen, do_utf8)) |
262b90c4 | 3183 | goto anyof_fail; |
ffc61ed2 JH |
3184 | if (locinput >= PL_regeol) |
3185 | sayNO; | |
0f0076b4 | 3186 | locinput += inclasslen ? inclasslen : UTF8SKIP(locinput); |
b8c5462f | 3187 | nextchr = UCHARAT(locinput); |
e0f9d4a8 | 3188 | break; |
ffc61ed2 JH |
3189 | } |
3190 | else { | |
3191 | if (nextchr < 0) | |
3192 | nextchr = UCHARAT(locinput); | |
32fc9b6a | 3193 | if (!REGINCLASS(rex, scan, (U8*)locinput)) |
262b90c4 | 3194 | goto anyof_fail; |
ffc61ed2 JH |
3195 | if (!nextchr && locinput >= PL_regeol) |
3196 | sayNO; | |
3197 | nextchr = UCHARAT(++locinput); | |
e0f9d4a8 JH |
3198 | break; |
3199 | } | |
262b90c4 | 3200 | anyof_fail: |
e0f9d4a8 JH |
3201 | /* If we might have the case of the German sharp s |
3202 | * in a casefolding Unicode character class. */ | |
3203 | ||
ebc501f0 JH |
3204 | if (ANYOF_FOLD_SHARP_S(scan, locinput, PL_regeol)) { |
3205 | locinput += SHARP_S_SKIP; | |
e0f9d4a8 | 3206 | nextchr = UCHARAT(locinput); |
ffc61ed2 | 3207 | } |
e0f9d4a8 JH |
3208 | else |
3209 | sayNO; | |
b8c5462f | 3210 | break; |
d6a28714 | 3211 | case ALNUML: |
b8c5462f JH |
3212 | PL_reg_flags |= RF_tainted; |
3213 | /* FALL THROUGH */ | |
d6a28714 | 3214 | case ALNUM: |
b8c5462f | 3215 | if (!nextchr) |
4633a7c4 | 3216 | sayNO; |
ffc61ed2 | 3217 | if (do_utf8) { |
1a4fad37 | 3218 | LOAD_UTF8_CHARCLASS_ALNUM(); |
ffc61ed2 | 3219 | if (!(OP(scan) == ALNUM |
bb7a0f54 | 3220 | ? (bool)swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8) |
d6a28714 | 3221 | : isALNUM_LC_utf8((U8*)locinput))) |
b8c5462f JH |
3222 | { |
3223 | sayNO; | |
a0ed51b3 | 3224 | } |
b8c5462f | 3225 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
3226 | nextchr = UCHARAT(locinput); |
3227 | break; | |
3228 | } | |
ffc61ed2 | 3229 | if (!(OP(scan) == ALNUM |
d6a28714 | 3230 | ? isALNUM(nextchr) : isALNUM_LC(nextchr))) |
bbce6d69 | 3231 | sayNO; |
b8c5462f | 3232 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 3233 | break; |
d6a28714 | 3234 | case NALNUML: |
b8c5462f JH |
3235 | PL_reg_flags |= RF_tainted; |
3236 | /* FALL THROUGH */ | |
d6a28714 JH |
3237 | case NALNUM: |
3238 | if (!nextchr && locinput >= PL_regeol) | |
a0ed51b3 | 3239 | sayNO; |
ffc61ed2 | 3240 | if (do_utf8) { |
1a4fad37 | 3241 | LOAD_UTF8_CHARCLASS_ALNUM(); |
ffc61ed2 | 3242 | if (OP(scan) == NALNUM |
bb7a0f54 | 3243 | ? (bool)swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8) |
d6a28714 JH |
3244 | : isALNUM_LC_utf8((U8*)locinput)) |
3245 | { | |
b8c5462f | 3246 | sayNO; |
d6a28714 | 3247 | } |
b8c5462f JH |
3248 | locinput += PL_utf8skip[nextchr]; |
3249 | nextchr = UCHARAT(locinput); | |
3250 | break; | |
3251 | } | |
ffc61ed2 | 3252 | if (OP(scan) == NALNUM |
d6a28714 | 3253 | ? isALNUM(nextchr) : isALNUM_LC(nextchr)) |
b8c5462f | 3254 | sayNO; |
76e3520e | 3255 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 3256 | break; |
d6a28714 JH |
3257 | case BOUNDL: |
3258 | case NBOUNDL: | |
3280af22 | 3259 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 3260 | /* FALL THROUGH */ |
d6a28714 JH |
3261 | case BOUND: |
3262 | case NBOUND: | |
3263 | /* was last char in word? */ | |
ffc61ed2 | 3264 | if (do_utf8) { |
12d33761 | 3265 | if (locinput == PL_bostr) |
24d3c4a9 | 3266 | ln = '\n'; |
ffc61ed2 | 3267 | else { |
a3b680e6 | 3268 | const U8 * const r = reghop3((U8*)locinput, -1, (U8*)PL_bostr); |
9041c2e3 | 3269 | |
24d3c4a9 | 3270 | ln = utf8n_to_uvchr(r, UTF8SKIP(r), 0, uniflags); |
ffc61ed2 JH |
3271 | } |
3272 | if (OP(scan) == BOUND || OP(scan) == NBOUND) { | |
24d3c4a9 | 3273 | ln = isALNUM_uni(ln); |
1a4fad37 | 3274 | LOAD_UTF8_CHARCLASS_ALNUM(); |
3568d838 | 3275 | n = swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8); |
ffc61ed2 JH |
3276 | } |
3277 | else { | |
24d3c4a9 | 3278 | ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln)); |
ffc61ed2 JH |
3279 | n = isALNUM_LC_utf8((U8*)locinput); |
3280 | } | |
a0ed51b3 | 3281 | } |
d6a28714 | 3282 | else { |
24d3c4a9 | 3283 | ln = (locinput != PL_bostr) ? |
12d33761 | 3284 | UCHARAT(locinput - 1) : '\n'; |
ffc61ed2 | 3285 | if (OP(scan) == BOUND || OP(scan) == NBOUND) { |
24d3c4a9 | 3286 | ln = isALNUM(ln); |
ffc61ed2 JH |
3287 | n = isALNUM(nextchr); |
3288 | } | |
3289 | else { | |
24d3c4a9 | 3290 | ln = isALNUM_LC(ln); |
ffc61ed2 JH |
3291 | n = isALNUM_LC(nextchr); |
3292 | } | |
d6a28714 | 3293 | } |
24d3c4a9 | 3294 | if (((!ln) == (!n)) == (OP(scan) == BOUND || |
ffc61ed2 JH |
3295 | OP(scan) == BOUNDL)) |
3296 | sayNO; | |
a0ed51b3 | 3297 | break; |
d6a28714 | 3298 | case SPACEL: |
3280af22 | 3299 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 3300 | /* FALL THROUGH */ |
d6a28714 | 3301 | case SPACE: |
9442cb0e | 3302 | if (!nextchr) |
4633a7c4 | 3303 | sayNO; |
1aa99e6b | 3304 | if (do_utf8) { |
fd400ab9 | 3305 | if (UTF8_IS_CONTINUED(nextchr)) { |
1a4fad37 | 3306 | LOAD_UTF8_CHARCLASS_SPACE(); |
ffc61ed2 | 3307 | if (!(OP(scan) == SPACE |
bb7a0f54 | 3308 | ? (bool)swash_fetch(PL_utf8_space, (U8*)locinput, do_utf8) |
ffc61ed2 JH |
3309 | : isSPACE_LC_utf8((U8*)locinput))) |
3310 | { | |
3311 | sayNO; | |
3312 | } | |
3313 | locinput += PL_utf8skip[nextchr]; | |
3314 | nextchr = UCHARAT(locinput); | |
3315 | break; | |
d6a28714 | 3316 | } |
ffc61ed2 JH |
3317 | if (!(OP(scan) == SPACE |
3318 | ? isSPACE(nextchr) : isSPACE_LC(nextchr))) | |
3319 | sayNO; | |
3320 | nextchr = UCHARAT(++locinput); | |
3321 | } | |
3322 | else { | |
3323 | if (!(OP(scan) == SPACE | |
3324 | ? isSPACE(nextchr) : isSPACE_LC(nextchr))) | |
3325 | sayNO; | |
3326 | nextchr = UCHARAT(++locinput); | |
a0ed51b3 | 3327 | } |
a0ed51b3 | 3328 | break; |
d6a28714 | 3329 | case NSPACEL: |
3280af22 | 3330 | PL_reg_flags |= RF_tainted; |
bbce6d69 | 3331 | /* FALL THROUGH */ |
d6a28714 | 3332 | case NSPACE: |
9442cb0e | 3333 | if (!nextchr && locinput >= PL_regeol) |
b8c5462f | 3334 | sayNO; |
1aa99e6b | 3335 | if (do_utf8) { |
1a4fad37 | 3336 | LOAD_UTF8_CHARCLASS_SPACE(); |
ffc61ed2 | 3337 | if (OP(scan) == NSPACE |
bb7a0f54 | 3338 | ? (bool)swash_fetch(PL_utf8_space, (U8*)locinput, do_utf8) |
d6a28714 | 3339 | : isSPACE_LC_utf8((U8*)locinput)) |
b8c5462f JH |
3340 | { |
3341 | sayNO; | |
3342 | } | |
3343 | locinput += PL_utf8skip[nextchr]; | |
3344 | nextchr = UCHARAT(locinput); | |
3345 | break; | |
a0ed51b3 | 3346 | } |
ffc61ed2 | 3347 | if (OP(scan) == NSPACE |
d6a28714 | 3348 | ? isSPACE(nextchr) : isSPACE_LC(nextchr)) |
4633a7c4 | 3349 | sayNO; |
76e3520e | 3350 | nextchr = UCHARAT(++locinput); |
a0d0e21e | 3351 | break; |
d6a28714 | 3352 | case DIGITL: |
a0ed51b3 LW |
3353 | PL_reg_flags |= RF_tainted; |
3354 | /* FALL THROUGH */ | |
d6a28714 | 3355 | case DIGIT: |
9442cb0e | 3356 | if (!nextchr) |
a0ed51b3 | 3357 | sayNO; |
1aa99e6b | 3358 | if (do_utf8) { |
1a4fad37 | 3359 | LOAD_UTF8_CHARCLASS_DIGIT(); |
ffc61ed2 | 3360 | if (!(OP(scan) == DIGIT |
bb7a0f54 | 3361 | ? (bool)swash_fetch(PL_utf8_digit, (U8*)locinput, do_utf8) |
9442cb0e | 3362 | : isDIGIT_LC_utf8((U8*)locinput))) |
dfe13c55 | 3363 | { |
a0ed51b3 | 3364 | sayNO; |
dfe13c55 | 3365 | } |
6f06b55f | 3366 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
3367 | nextchr = UCHARAT(locinput); |
3368 | break; | |
3369 | } | |
ffc61ed2 | 3370 | if (!(OP(scan) == DIGIT |
9442cb0e | 3371 | ? isDIGIT(nextchr) : isDIGIT_LC(nextchr))) |
a0ed51b3 LW |
3372 | sayNO; |
3373 | nextchr = UCHARAT(++locinput); | |
3374 | break; | |
d6a28714 | 3375 | case NDIGITL: |
b8c5462f JH |
3376 | PL_reg_flags |= RF_tainted; |
3377 | /* FALL THROUGH */ | |
d6a28714 | 3378 | case NDIGIT: |
9442cb0e | 3379 | if (!nextchr && locinput >= PL_regeol) |
b8c5462f | 3380 | sayNO; |
1aa99e6b | 3381 | if (do_utf8) { |
1a4fad37 | 3382 | LOAD_UTF8_CHARCLASS_DIGIT(); |
ffc61ed2 | 3383 | if (OP(scan) == NDIGIT |
bb7a0f54 | 3384 | ? (bool)swash_fetch(PL_utf8_digit, (U8*)locinput, do_utf8) |
9442cb0e GS |
3385 | : isDIGIT_LC_utf8((U8*)locinput)) |
3386 | { | |
a0ed51b3 | 3387 | sayNO; |
9442cb0e | 3388 | } |
6f06b55f | 3389 | locinput += PL_utf8skip[nextchr]; |
a0ed51b3 LW |
3390 | nextchr = UCHARAT(locinput); |
3391 | break; | |
3392 | } | |
ffc61ed2 | 3393 | if (OP(scan) == NDIGIT |
9442cb0e | 3394 | ? isDIGIT(nextchr) : isDIGIT_LC(nextchr)) |
a0ed51b3 LW |
3395 | sayNO; |
3396 | nextchr = UCHARAT(++locinput); | |
3397 | break; | |
3398 | case CLUMP: | |
b7c83a7e | 3399 | if (locinput >= PL_regeol) |
a0ed51b3 | 3400 | sayNO; |
b7c83a7e | 3401 | if (do_utf8) { |
1a4fad37 | 3402 | LOAD_UTF8_CHARCLASS_MARK(); |
b7c83a7e JH |
3403 | if (swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8)) |
3404 | sayNO; | |
3405 | locinput += PL_utf8skip[nextchr]; | |
3406 | while (locinput < PL_regeol && | |
3407 | swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8)) | |
3408 | locinput += UTF8SKIP(locinput); | |
3409 | if (locinput > PL_regeol) | |
3410 | sayNO; | |
eb08e2da JH |
3411 | } |
3412 | else | |
3413 | locinput++; | |
a0ed51b3 LW |
3414 | nextchr = UCHARAT(locinput); |
3415 | break; | |
81714fb9 YO |
3416 | |
3417 | case NREFFL: | |
3418 | { | |
3419 | char *s; | |
ff1157ca | 3420 | char type; |
81714fb9 YO |
3421 | PL_reg_flags |= RF_tainted; |
3422 | /* FALL THROUGH */ | |
3423 | case NREF: | |
3424 | case NREFF: | |
ff1157ca | 3425 | type = OP(scan); |
0a4db386 YO |
3426 | n = reg_check_named_buff_matched(rex,scan); |
3427 | ||
3428 | if ( n ) { | |
3429 | type = REF + ( type - NREF ); | |
3430 | goto do_ref; | |
3431 | } else { | |
81714fb9 | 3432 | sayNO; |
0a4db386 YO |
3433 | } |
3434 | /* unreached */ | |
c8756f30 | 3435 | case REFFL: |
3280af22 | 3436 | PL_reg_flags |= RF_tainted; |
c8756f30 | 3437 | /* FALL THROUGH */ |
c277df42 | 3438 | case REF: |
81714fb9 | 3439 | case REFF: |
c277df42 | 3440 | n = ARG(scan); /* which paren pair */ |
81714fb9 YO |
3441 | type = OP(scan); |
3442 | do_ref: | |
24d3c4a9 | 3443 | ln = PL_regstartp[n]; |
2c2d71f5 | 3444 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
3b6647e0 | 3445 | if (*PL_reglastparen < n || ln == -1) |
af3f8c16 | 3446 | sayNO; /* Do not match unless seen CLOSEn. */ |
24d3c4a9 | 3447 | if (ln == PL_regendp[n]) |
a0d0e21e | 3448 | break; |
a0ed51b3 | 3449 | |
24d3c4a9 | 3450 | s = PL_bostr + ln; |
81714fb9 | 3451 | if (do_utf8 && type != REF) { /* REF can do byte comparison */ |
a0ed51b3 | 3452 | char *l = locinput; |
a3b680e6 | 3453 | const char *e = PL_bostr + PL_regendp[n]; |
a0ed51b3 LW |
3454 | /* |
3455 | * Note that we can't do the "other character" lookup trick as | |
3456 | * in the 8-bit case (no pun intended) because in Unicode we | |
3457 | * have to map both upper and title case to lower case. | |
3458 | */ | |
81714fb9 | 3459 | if (type == REFF) { |
a0ed51b3 | 3460 | while (s < e) { |
a3b680e6 AL |
3461 | STRLEN ulen1, ulen2; |
3462 | U8 tmpbuf1[UTF8_MAXBYTES_CASE+1]; | |
3463 | U8 tmpbuf2[UTF8_MAXBYTES_CASE+1]; | |
3464 | ||
a0ed51b3 LW |
3465 | if (l >= PL_regeol) |
3466 | sayNO; | |
a2a2844f JH |
3467 | toLOWER_utf8((U8*)s, tmpbuf1, &ulen1); |
3468 | toLOWER_utf8((U8*)l, tmpbuf2, &ulen2); | |
7114a2d2 | 3469 | if (ulen1 != ulen2 || memNE((char *)tmpbuf1, (char *)tmpbuf2, ulen1)) |
a0ed51b3 | 3470 | sayNO; |
a2a2844f JH |
3471 | s += ulen1; |
3472 | l += ulen2; | |
a0ed51b3 LW |
3473 | } |
3474 | } | |
3475 | locinput = l; | |
3476 | nextchr = UCHARAT(locinput); | |
3477 | break; | |
3478 | } | |
3479 | ||
a0d0e21e | 3480 | /* Inline the first character, for speed. */ |
76e3520e | 3481 | if (UCHARAT(s) != nextchr && |
81714fb9 YO |
3482 | (type == REF || |
3483 | (UCHARAT(s) != (type == REFF | |
3484 | ? PL_fold : PL_fold_locale)[nextchr]))) | |
4633a7c4 | 3485 | sayNO; |
24d3c4a9 DM |
3486 | ln = PL_regendp[n] - ln; |
3487 | if (locinput + ln > PL_regeol) | |
4633a7c4 | 3488 | sayNO; |
81714fb9 | 3489 | if (ln > 1 && (type == REF |
24d3c4a9 | 3490 | ? memNE(s, locinput, ln) |
81714fb9 | 3491 | : (type == REFF |
24d3c4a9 DM |
3492 | ? ibcmp(s, locinput, ln) |
3493 | : ibcmp_locale(s, locinput, ln)))) | |
4633a7c4 | 3494 | sayNO; |
24d3c4a9 | 3495 | locinput += ln; |
76e3520e | 3496 | nextchr = UCHARAT(locinput); |
a0d0e21e | 3497 | break; |
81714fb9 | 3498 | } |
a0d0e21e | 3499 | case NOTHING: |
c277df42 | 3500 | case TAIL: |
a0d0e21e LW |
3501 | break; |
3502 | case BACK: | |
3503 | break; | |
40a82448 DM |
3504 | |
3505 | #undef ST | |
3506 | #define ST st->u.eval | |
c277df42 | 3507 | { |
c277df42 | 3508 | SV *ret; |
6bda09f9 | 3509 | regexp *re; |
f8fc2ecf | 3510 | regexp_internal *rei; |
1a147d38 YO |
3511 | regnode *startpoint; |
3512 | ||
3513 | case GOSTART: | |
3514 | case GOSUB: /* /(...(?1))/ */ | |
6bda09f9 | 3515 | if (cur_eval && cur_eval->locinput==locinput) { |
24b23f37 | 3516 | if (cur_eval->u.eval.close_paren == (U32)ARG(scan)) |
1a147d38 | 3517 | Perl_croak(aTHX_ "Infinite recursion in regex"); |
6bda09f9 | 3518 | if ( ++nochange_depth > MAX_RECURSE_EVAL_NOCHANGE_DEPTH ) |
1a147d38 YO |
3519 | Perl_croak(aTHX_ |
3520 | "Pattern subroutine nesting without pos change" | |
3521 | " exceeded limit in regex"); | |
6bda09f9 YO |
3522 | } else { |
3523 | nochange_depth = 0; | |
1a147d38 | 3524 | } |
6bda09f9 | 3525 | re = rex; |
f8fc2ecf | 3526 | rei = rexi; |
6bda09f9 | 3527 | (void)ReREFCNT_inc(rex); |
1a147d38 | 3528 | if (OP(scan)==GOSUB) { |
6bda09f9 YO |
3529 | startpoint = scan + ARG2L(scan); |
3530 | ST.close_paren = ARG(scan); | |
3531 | } else { | |
f8fc2ecf | 3532 | startpoint = rei->program+1; |
6bda09f9 YO |
3533 | ST.close_paren = 0; |
3534 | } | |
3535 | goto eval_recurse_doit; | |
3536 | /* NOTREACHED */ | |
3537 | case EVAL: /* /(?{A})B/ /(??{A})B/ and /(?(?{A})X|Y)B/ */ | |
3538 | if (cur_eval && cur_eval->locinput==locinput) { | |
3539 | if ( ++nochange_depth > MAX_RECURSE_EVAL_NOCHANGE_DEPTH ) | |
1a147d38 | 3540 | Perl_croak(aTHX_ "EVAL without pos change exceeded limit in regex"); |
6bda09f9 YO |
3541 | } else { |
3542 | nochange_depth = 0; | |
3543 | } | |
8e5e9ebe | 3544 | { |
4aabdb9b DM |
3545 | /* execute the code in the {...} */ |
3546 | dSP; | |
6136c704 | 3547 | SV ** const before = SP; |
4aabdb9b DM |
3548 | OP_4tree * const oop = PL_op; |
3549 | COP * const ocurcop = PL_curcop; | |
3550 | PAD *old_comppad; | |
4aabdb9b DM |
3551 | |
3552 | n = ARG(scan); | |
f8fc2ecf | 3553 | PL_op = (OP_4tree*)rexi->data->data[n]; |
24b23f37 YO |
3554 | DEBUG_STATE_r( PerlIO_printf(Perl_debug_log, |
3555 | " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) ); | |
f8fc2ecf | 3556 | PAD_SAVE_LOCAL(old_comppad, (PAD*)rexi->data->data[n + 2]); |
4aabdb9b DM |
3557 | PL_regendp[0] = PL_reg_magic->mg_len = locinput - PL_bostr; |
3558 | ||
8e5e9ebe RGS |
3559 | CALLRUNOPS(aTHX); /* Scalar context. */ |
3560 | SPAGAIN; | |
3561 | if (SP == before) | |
075aa684 | 3562 | ret = &PL_sv_undef; /* protect against empty (?{}) blocks. */ |
8e5e9ebe RGS |
3563 | else { |
3564 | ret = POPs; | |
3565 | PUTBACK; | |
3566 | } | |
4aabdb9b DM |
3567 | |
3568 | PL_op = oop; | |
3569 | PAD_RESTORE_LOCAL(old_comppad); | |
3570 | PL_curcop = ocurcop; | |
24d3c4a9 | 3571 | if (!logical) { |
4aabdb9b DM |
3572 | /* /(?{...})/ */ |
3573 | sv_setsv(save_scalar(PL_replgv), ret); | |
4aabdb9b DM |
3574 | break; |
3575 | } | |
8e5e9ebe | 3576 | } |
24d3c4a9 DM |
3577 | if (logical == 2) { /* Postponed subexpression: /(??{...})/ */ |
3578 | logical = 0; | |
4aabdb9b | 3579 | { |
4f639d21 DM |
3580 | /* extract RE object from returned value; compiling if |
3581 | * necessary */ | |
3582 | ||
6136c704 | 3583 | MAGIC *mg = NULL; |
be8e71aa | 3584 | const SV *sv; |
faf82a0b AE |
3585 | if(SvROK(ret) && SvSMAGICAL(sv = SvRV(ret))) |
3586 | mg = mg_find(sv, PERL_MAGIC_qr); | |
3587 | else if (SvSMAGICAL(ret)) { | |
3588 | if (SvGMAGICAL(ret)) | |
3589 | sv_unmagic(ret, PERL_MAGIC_qr); | |
3590 | else | |
3591 | mg = mg_find(ret, PERL_MAGIC_qr); | |
0f5d15d6 | 3592 | } |
faf82a0b | 3593 | |
0f5d15d6 IZ |
3594 | if (mg) { |
3595 | re = (regexp *)mg->mg_obj; | |
df0003d4 | 3596 | (void)ReREFCNT_inc(re); |
0f5d15d6 IZ |
3597 | } |
3598 | else { | |
3599 | STRLEN len; | |
6136c704 | 3600 | const char * const t = SvPV_const(ret, len); |
0f5d15d6 | 3601 | PMOP pm; |
a3b680e6 | 3602 | const I32 osize = PL_regsize; |
0f5d15d6 | 3603 | |
5fcd1c1b | 3604 | Zero(&pm, 1, PMOP); |
4aabdb9b | 3605 | if (DO_UTF8(ret)) pm.op_pmdynflags |= PMdf_DYN_UTF8; |
f9f4320a | 3606 | re = CALLREGCOMP((char*)t, (char*)t + len, &pm); |
9041c2e3 | 3607 | if (!(SvFLAGS(ret) |
faf82a0b AE |
3608 | & (SVs_TEMP | SVs_PADTMP | SVf_READONLY |
3609 | | SVs_GMG))) | |
14befaf4 DM |
3610 | sv_magic(ret,(SV*)ReREFCNT_inc(re), |
3611 | PERL_MAGIC_qr,0,0); | |
0f5d15d6 | 3612 | PL_regsize = osize; |
0f5d15d6 | 3613 | } |
4aabdb9b | 3614 | } |
f8fc2ecf | 3615 | rei = RXi_GET(re); |
6bda09f9 YO |
3616 | DEBUG_EXECUTE_r( |
3617 | debug_start_match(re, do_utf8, locinput, PL_regeol, | |
3618 | "Matching embedded"); | |
3619 | ); | |
f8fc2ecf | 3620 | startpoint = rei->program + 1; |
1a147d38 | 3621 | ST.close_paren = 0; /* only used for GOSUB */ |
6bda09f9 YO |
3622 | /* borrowed from regtry */ |
3623 | if (PL_reg_start_tmpl <= re->nparens) { | |
3624 | PL_reg_start_tmpl = re->nparens*3/2 + 3; | |
3625 | if(PL_reg_start_tmp) | |
3626 | Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*); | |
3627 | else | |
3628 | Newx(PL_reg_start_tmp, PL_reg_start_tmpl, char*); | |
3629 | } | |
aa283a38 | 3630 | |
1a147d38 | 3631 | eval_recurse_doit: /* Share code with GOSUB below this line */ |
aa283a38 | 3632 | /* run the pattern returned from (??{...}) */ |
40a82448 DM |
3633 | ST.cp = regcppush(0); /* Save *all* the positions. */ |
3634 | REGCP_SET(ST.lastcp); | |
6bda09f9 | 3635 | |
1a147d38 YO |
3636 | PL_regstartp = re->startp; /* essentially NOOP on GOSUB */ |
3637 | PL_regendp = re->endp; /* essentially NOOP on GOSUB */ | |
6bda09f9 | 3638 | |
4aabdb9b DM |
3639 | *PL_reglastparen = 0; |
3640 | *PL_reglastcloseparen = 0; | |
4aabdb9b | 3641 | PL_reginput = locinput; |
ae0beba1 | 3642 | PL_regsize = 0; |
4aabdb9b DM |
3643 | |
3644 | /* XXXX This is too dramatic a measure... */ | |
3645 | PL_reg_maxiter = 0; | |
3646 | ||
faec1544 | 3647 | ST.toggle_reg_flags = PL_reg_flags; |
bbe252da | 3648 | if (re->extflags & RXf_UTF8) |
faec1544 DM |
3649 | PL_reg_flags |= RF_utf8; |
3650 | else | |
3651 | PL_reg_flags &= ~RF_utf8; | |
3652 | ST.toggle_reg_flags ^= PL_reg_flags; /* diff of old and new */ | |
3653 | ||
40a82448 | 3654 | ST.prev_rex = rex; |
faec1544 | 3655 | ST.prev_curlyx = cur_curlyx; |
aa283a38 | 3656 | rex = re; |
f8fc2ecf | 3657 | rexi = rei; |
faec1544 | 3658 | cur_curlyx = NULL; |
40a82448 | 3659 | ST.B = next; |
faec1544 DM |
3660 | ST.prev_eval = cur_eval; |
3661 | cur_eval = st; | |
faec1544 | 3662 | /* now continue from first node in postoned RE */ |
6bda09f9 | 3663 | PUSH_YES_STATE_GOTO(EVAL_AB, startpoint); |
4aabdb9b | 3664 | /* NOTREACHED */ |
a0ed51b3 | 3665 | } |
24d3c4a9 DM |
3666 | /* logical is 1, /(?(?{...})X|Y)/ */ |
3667 | sw = (bool)SvTRUE(ret); | |
3668 | logical = 0; | |
c277df42 IZ |
3669 | break; |
3670 | } | |
40a82448 | 3671 | |
faec1544 DM |
3672 | case EVAL_AB: /* cleanup after a successful (??{A})B */ |
3673 | /* note: this is called twice; first after popping B, then A */ | |
3674 | PL_reg_flags ^= ST.toggle_reg_flags; | |
40a82448 DM |
3675 | ReREFCNT_dec(rex); |
3676 | rex = ST.prev_rex; | |
f8fc2ecf | 3677 | rexi = RXi_GET(rex); |
faec1544 DM |
3678 | regcpblow(ST.cp); |
3679 | cur_eval = ST.prev_eval; | |
3680 | cur_curlyx = ST.prev_curlyx; | |
40a82448 DM |
3681 | /* XXXX This is too dramatic a measure... */ |
3682 | PL_reg_maxiter = 0; | |
262b90c4 | 3683 | sayYES; |
40a82448 | 3684 | |
40a82448 | 3685 | |
faec1544 DM |
3686 | case EVAL_AB_fail: /* unsuccessfully ran A or B in (??{A})B */ |
3687 | /* note: this is called twice; first after popping B, then A */ | |
3688 | PL_reg_flags ^= ST.toggle_reg_flags; | |
3689 | ReREFCNT_dec(rex); | |
3690 | rex = ST.prev_rex; | |
f8fc2ecf | 3691 | rexi = RXi_GET(rex); |
40a82448 DM |
3692 | PL_reginput = locinput; |
3693 | REGCP_UNWIND(ST.lastcp); | |
3694 | regcppop(rex); | |
faec1544 DM |
3695 | cur_eval = ST.prev_eval; |
3696 | cur_curlyx = ST.prev_curlyx; | |
3697 | /* XXXX This is too dramatic a measure... */ | |
3698 | PL_reg_maxiter = 0; | |
40a82448 | 3699 | sayNO_SILENT; |
40a82448 DM |
3700 | #undef ST |
3701 | ||
a0d0e21e | 3702 | case OPEN: |
c277df42 | 3703 | n = ARG(scan); /* which paren pair */ |
3280af22 NIS |
3704 | PL_reg_start_tmp[n] = locinput; |
3705 | if (n > PL_regsize) | |
3706 | PL_regsize = n; | |
e2e6a0f1 | 3707 | lastopen = n; |
a0d0e21e LW |
3708 | break; |
3709 | case CLOSE: | |
c277df42 | 3710 | n = ARG(scan); /* which paren pair */ |
cf93c79d IZ |
3711 | PL_regstartp[n] = PL_reg_start_tmp[n] - PL_bostr; |
3712 | PL_regendp[n] = locinput - PL_bostr; | |
7f69552c YO |
3713 | /*if (n > PL_regsize) |
3714 | PL_regsize = n;*/ | |
3b6647e0 | 3715 | if (n > *PL_reglastparen) |
3280af22 | 3716 | *PL_reglastparen = n; |
a01268b5 | 3717 | *PL_reglastcloseparen = n; |
3b6647e0 | 3718 | if (cur_eval && cur_eval->u.eval.close_paren == n) { |
6bda09f9 YO |
3719 | goto fake_end; |
3720 | } | |
a0d0e21e | 3721 | break; |
e2e6a0f1 YO |
3722 | case ACCEPT: |
3723 | if (ARG(scan)){ | |
3724 | regnode *cursor; | |
3725 | for (cursor=scan; | |
3726 | cursor && OP(cursor)!=END; | |
3727 | cursor=regnext(cursor)) | |
3728 | { | |
3729 | if ( OP(cursor)==CLOSE ){ | |
3730 | n = ARG(cursor); | |
3731 | if ( n <= lastopen ) { | |
3732 | PL_regstartp[n] = PL_reg_start_tmp[n] - PL_bostr; | |
3733 | PL_regendp[n] = locinput - PL_bostr; | |
3734 | /*if (n > PL_regsize) | |
3735 | PL_regsize = n;*/ | |
3b6647e0 | 3736 | if (n > *PL_reglastparen) |
e2e6a0f1 YO |
3737 | *PL_reglastparen = n; |
3738 | *PL_reglastcloseparen = n; | |
3b6647e0 RB |
3739 | if ( n == ARG(scan) || (cur_eval && |
3740 | cur_eval->u.eval.close_paren == n)) | |
e2e6a0f1 YO |
3741 | break; |
3742 | } | |
3743 | } | |
3744 | } | |
3745 | } | |
3746 | goto fake_end; | |
3747 | /*NOTREACHED*/ | |
c277df42 IZ |
3748 | case GROUPP: |
3749 | n = ARG(scan); /* which paren pair */ | |
3b6647e0 | 3750 | sw = (bool)(*PL_reglastparen >= n && PL_regendp[n] != -1); |
c277df42 | 3751 | break; |
0a4db386 YO |
3752 | case NGROUPP: |
3753 | /* reg_check_named_buff_matched returns 0 for no match */ | |
3754 | sw = (bool)(0 < reg_check_named_buff_matched(rex,scan)); | |
3755 | break; | |
1a147d38 | 3756 | case INSUBP: |
0a4db386 | 3757 | n = ARG(scan); |
3b6647e0 | 3758 | sw = (cur_eval && (!n || cur_eval->u.eval.close_paren == n)); |
0a4db386 YO |
3759 | break; |
3760 | case DEFINEP: | |
3761 | sw = 0; | |
3762 | break; | |
c277df42 | 3763 | case IFTHEN: |
2c2d71f5 | 3764 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
24d3c4a9 | 3765 | if (sw) |
c277df42 IZ |
3766 | next = NEXTOPER(NEXTOPER(scan)); |
3767 | else { | |
3768 | next = scan + ARG(scan); | |
3769 | if (OP(next) == IFTHEN) /* Fake one. */ | |
3770 | next = NEXTOPER(NEXTOPER(next)); | |
3771 | } | |
3772 | break; | |
3773 | case LOGICAL: | |
24d3c4a9 | 3774 | logical = scan->flags; |
c277df42 | 3775 | break; |
c476f425 | 3776 | |
2ab05381 | 3777 | /******************************************************************* |
2ab05381 | 3778 | |
c476f425 DM |
3779 | The CURLYX/WHILEM pair of ops handle the most generic case of the /A*B/ |
3780 | pattern, where A and B are subpatterns. (For simple A, CURLYM or | |
3781 | STAR/PLUS/CURLY/CURLYN are used instead.) | |
2ab05381 | 3782 | |
c476f425 | 3783 | A*B is compiled as <CURLYX><A><WHILEM><B> |
2ab05381 | 3784 | |
c476f425 DM |
3785 | On entry to the subpattern, CURLYX is called. This pushes a CURLYX |
3786 | state, which contains the current count, initialised to -1. It also sets | |
3787 | cur_curlyx to point to this state, with any previous value saved in the | |
3788 | state block. | |
2ab05381 | 3789 | |
c476f425 DM |
3790 | CURLYX then jumps straight to the WHILEM op, rather than executing A, |
3791 | since the pattern may possibly match zero times (i.e. it's a while {} loop | |
3792 | rather than a do {} while loop). | |
2ab05381 | 3793 | |
c476f425 DM |
3794 | Each entry to WHILEM represents a successful match of A. The count in the |
3795 | CURLYX block is incremented, another WHILEM state is pushed, and execution | |
3796 | passes to A or B depending on greediness and the current count. | |
2ab05381 | 3797 | |
c476f425 DM |
3798 | For example, if matching against the string a1a2a3b (where the aN are |
3799 | substrings that match /A/), then the match progresses as follows: (the | |
3800 | pushed states are interspersed with the bits of strings matched so far): | |
2ab05381 | 3801 | |
c476f425 DM |
3802 | <CURLYX cnt=-1> |
3803 | <CURLYX cnt=0><WHILEM> | |
3804 | <CURLYX cnt=1><WHILEM> a1 <WHILEM> | |
3805 | <CURLYX cnt=2><WHILEM> a1 <WHILEM> a2 <WHILEM> | |
3806 | <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> | |
3807 | <CURLYX cnt=3><WHILEM> a1 <WHILEM> a2 <WHILEM> a3 <WHILEM> b | |
2ab05381 | 3808 | |
c476f425 DM |
3809 | (Contrast this with something like CURLYM, which maintains only a single |
3810 | backtrack state: | |
2ab05381 | 3811 | |
c476f425 DM |
3812 | <CURLYM cnt=0> a1 |
3813 | a1 <CURLYM cnt=1> a2 | |
3814 | a1 a2 <CURLYM cnt=2> a3 | |
3815 | a1 a2 a3 <CURLYM cnt=3> b | |
3816 | ) | |
2ab05381 | 3817 | |
c476f425 DM |
3818 | Each WHILEM state block marks a point to backtrack to upon partial failure |
3819 | of A or B, and also contains some minor state data related to that | |
3820 | iteration. The CURLYX block, pointed to by cur_curlyx, contains the | |
3821 | overall state, such as the count, and pointers to the A and B ops. | |
2ab05381 | 3822 | |
c476f425 DM |
3823 | This is complicated slightly by nested CURLYX/WHILEM's. Since cur_curlyx |
3824 | must always point to the *current* CURLYX block, the rules are: | |
2ab05381 | 3825 | |
c476f425 DM |
3826 | When executing CURLYX, save the old cur_curlyx in the CURLYX state block, |
3827 | and set cur_curlyx to point the new block. | |
2ab05381 | 3828 | |
c476f425 DM |
3829 | When popping the CURLYX block after a successful or unsuccessful match, |
3830 | restore the previous cur_curlyx. | |
2ab05381 | 3831 | |
c476f425 DM |
3832 | When WHILEM is about to execute B, save the current cur_curlyx, and set it |
3833 | to the outer one saved in the CURLYX block. | |
2ab05381 | 3834 | |
c476f425 DM |
3835 | When popping the WHILEM block after a successful or unsuccessful B match, |
3836 | restore the previous cur_curlyx. | |
2ab05381 | 3837 | |
c476f425 DM |
3838 | Here's an example for the pattern (AI* BI)*BO |
3839 | I and O refer to inner and outer, C and W refer to CURLYX and WHILEM: | |
2ab05381 | 3840 | |
c476f425 DM |
3841 | cur_ |
3842 | curlyx backtrack stack | |
3843 | ------ --------------- | |
3844 | NULL | |
3845 | CO <CO prev=NULL> <WO> | |
3846 | CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai | |
3847 | CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi | |
3848 | NULL <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi <WO prev=CO> bo | |
2ab05381 | 3849 | |
c476f425 DM |
3850 | At this point the pattern succeeds, and we work back down the stack to |
3851 | clean up, restoring as we go: | |
95b24440 | 3852 | |
c476f425 DM |
3853 | CO <CO prev=NULL> <WO> <CI prev=CO> <WI> ai <WI prev=CI> bi |
3854 | CI <CO prev=NULL> <WO> <CI prev=CO> <WI> ai | |
3855 | CO <CO prev=NULL> <WO> | |
3856 | NULL | |
a0374537 | 3857 | |
c476f425 DM |
3858 | *******************************************************************/ |
3859 | ||
3860 | #define ST st->u.curlyx | |
3861 | ||
3862 | case CURLYX: /* start of /A*B/ (for complex A) */ | |
3863 | { | |
3864 | /* No need to save/restore up to this paren */ | |
3865 | I32 parenfloor = scan->flags; | |
3866 | ||
3867 | assert(next); /* keep Coverity happy */ | |
3868 | if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */ | |
3869 | next += ARG(next); | |
3870 | ||
3871 | /* XXXX Probably it is better to teach regpush to support | |
3872 | parenfloor > PL_regsize... */ | |
3873 | if (parenfloor > (I32)*PL_reglastparen) | |
3874 | parenfloor = *PL_reglastparen; /* Pessimization... */ | |
3875 | ||
3876 | ST.prev_curlyx= cur_curlyx; | |
3877 | cur_curlyx = st; | |
3878 | ST.cp = PL_savestack_ix; | |
3879 | ||
3880 | /* these fields contain the state of the current curly. | |
3881 | * they are accessed by subsequent WHILEMs */ | |
3882 | ST.parenfloor = parenfloor; | |
3883 | ST.min = ARG1(scan); | |
3884 | ST.max = ARG2(scan); | |
3885 | ST.A = NEXTOPER(scan) + EXTRA_STEP_2ARGS; | |
3886 | ST.B = next; | |
24d3c4a9 DM |
3887 | ST.minmod = minmod; |
3888 | minmod = 0; | |
c476f425 DM |
3889 | ST.count = -1; /* this will be updated by WHILEM */ |
3890 | ST.lastloc = NULL; /* this will be updated by WHILEM */ | |
3891 | ||
3892 | PL_reginput = locinput; | |
3893 | PUSH_YES_STATE_GOTO(CURLYX_end, PREVOPER(next)); | |
5f66b61c | 3894 | /* NOTREACHED */ |
c476f425 | 3895 | } |
a0d0e21e | 3896 | |
c476f425 | 3897 | case CURLYX_end: /* just finished matching all of A*B */ |
f0852a51 YO |
3898 | if (PL_reg_eval_set){ |
3899 | SV *pres= GvSV(PL_replgv); | |
3900 | SvREFCNT_inc(pres); | |
3901 | regcpblow(ST.cp); | |
3902 | sv_setsv(GvSV(PL_replgv), pres); | |
3903 | SvREFCNT_dec(pres); | |
3904 | } else { | |
3905 | regcpblow(ST.cp); | |
3906 | } | |
c476f425 DM |
3907 | cur_curlyx = ST.prev_curlyx; |
3908 | sayYES; | |
3909 | /* NOTREACHED */ | |
a0d0e21e | 3910 | |
c476f425 DM |
3911 | case CURLYX_end_fail: /* just failed to match all of A*B */ |
3912 | regcpblow(ST.cp); | |
3913 | cur_curlyx = ST.prev_curlyx; | |
3914 | sayNO; | |
3915 | /* NOTREACHED */ | |
4633a7c4 | 3916 | |
a0d0e21e | 3917 | |
c476f425 DM |
3918 | #undef ST |
3919 | #define ST st->u.whilem | |
3920 | ||
3921 | case WHILEM: /* just matched an A in /A*B/ (for complex A) */ | |
3922 | { | |
3923 | /* see the discussion above about CURLYX/WHILEM */ | |
c476f425 DM |
3924 | I32 n; |
3925 | assert(cur_curlyx); /* keep Coverity happy */ | |
3926 | n = ++cur_curlyx->u.curlyx.count; /* how many A's matched */ | |
3927 | ST.save_lastloc = cur_curlyx->u.curlyx.lastloc; | |
3928 | ST.cache_offset = 0; | |
3929 | ST.cache_mask = 0; | |
3930 | ||
3931 | PL_reginput = locinput; | |
3932 | ||
3933 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, | |
3934 | "%*s whilem: matched %ld out of %ld..%ld\n", | |
3935 | REPORT_CODE_OFF+depth*2, "", (long)n, | |
3936 | (long)cur_curlyx->u.curlyx.min, | |
3937 | (long)cur_curlyx->u.curlyx.max) | |
3938 | ); | |
a0d0e21e | 3939 | |
c476f425 | 3940 | /* First just match a string of min A's. */ |
a0d0e21e | 3941 | |
c476f425 DM |
3942 | if (n < cur_curlyx->u.curlyx.min) { |
3943 | cur_curlyx->u.curlyx.lastloc = locinput; | |
3944 | PUSH_STATE_GOTO(WHILEM_A_pre, cur_curlyx->u.curlyx.A); | |
3945 | /* NOTREACHED */ | |
3946 | } | |
3947 | ||
3948 | /* If degenerate A matches "", assume A done. */ | |
3949 | ||
3950 | if (locinput == cur_curlyx->u.curlyx.lastloc) { | |
3951 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, | |
3952 | "%*s whilem: empty match detected, trying continuation...\n", | |
3953 | REPORT_CODE_OFF+depth*2, "") | |
3954 | ); | |
3955 | goto do_whilem_B_max; | |
3956 | } | |
3957 | ||
3958 | /* super-linear cache processing */ | |
3959 | ||
3960 | if (scan->flags) { | |
a0d0e21e | 3961 | |
2c2d71f5 | 3962 | if (!PL_reg_maxiter) { |
c476f425 DM |
3963 | /* start the countdown: Postpone detection until we |
3964 | * know the match is not *that* much linear. */ | |
2c2d71f5 | 3965 | PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4); |
66bf836d DM |
3966 | /* possible overflow for long strings and many CURLYX's */ |
3967 | if (PL_reg_maxiter < 0) | |
3968 | PL_reg_maxiter = I32_MAX; | |
2c2d71f5 JH |
3969 | PL_reg_leftiter = PL_reg_maxiter; |
3970 | } | |
c476f425 | 3971 | |
2c2d71f5 | 3972 | if (PL_reg_leftiter-- == 0) { |
c476f425 | 3973 | /* initialise cache */ |
3298f257 | 3974 | const I32 size = (PL_reg_maxiter + 7)/8; |
2c2d71f5 | 3975 | if (PL_reg_poscache) { |
eb160463 | 3976 | if ((I32)PL_reg_poscache_size < size) { |
2c2d71f5 JH |
3977 | Renew(PL_reg_poscache, size, char); |
3978 | PL_reg_poscache_size = size; | |
3979 | } | |
3980 | Zero(PL_reg_poscache, size, char); | |
3981 | } | |
3982 | else { | |
3983 | PL_reg_poscache_size = size; | |
a02a5408 | 3984 | Newxz(PL_reg_poscache, size, char); |
2c2d71f5 | 3985 | } |
c476f425 DM |
3986 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, |
3987 | "%swhilem: Detected a super-linear match, switching on caching%s...\n", | |
3988 | PL_colors[4], PL_colors[5]) | |
3989 | ); | |
2c2d71f5 | 3990 | } |
c476f425 | 3991 | |
2c2d71f5 | 3992 | if (PL_reg_leftiter < 0) { |
c476f425 DM |
3993 | /* have we already failed at this position? */ |
3994 | I32 offset, mask; | |
3995 | offset = (scan->flags & 0xf) - 1 | |
3996 | + (locinput - PL_bostr) * (scan->flags>>4); | |
3997 | mask = 1 << (offset % 8); | |
3998 | offset /= 8; | |
3999 | if (PL_reg_poscache[offset] & mask) { | |
4000 | DEBUG_EXECUTE_r( PerlIO_printf(Perl_debug_log, | |
4001 | "%*s whilem: (cache) already tried at this position...\n", | |
4002 | REPORT_CODE_OFF+depth*2, "") | |
2c2d71f5 | 4003 | ); |
3298f257 | 4004 | sayNO; /* cache records failure */ |
2c2d71f5 | 4005 | } |
c476f425 DM |
4006 | ST.cache_offset = offset; |
4007 | ST.cache_mask = mask; | |
2c2d71f5 | 4008 | } |
c476f425 | 4009 | } |
2c2d71f5 | 4010 | |
c476f425 | 4011 | /* Prefer B over A for minimal matching. */ |
a687059c | 4012 | |
c476f425 DM |
4013 | if (cur_curlyx->u.curlyx.minmod) { |
4014 | ST.save_curlyx = cur_curlyx; | |
4015 | cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx; | |
4016 | ST.cp = regcppush(ST.save_curlyx->u.curlyx.parenfloor); | |
4017 | REGCP_SET(ST.lastcp); | |
4018 | PUSH_YES_STATE_GOTO(WHILEM_B_min, ST.save_curlyx->u.curlyx.B); | |
4019 | /* NOTREACHED */ | |
4020 | } | |
a0d0e21e | 4021 | |
c476f425 DM |
4022 | /* Prefer A over B for maximal matching. */ |
4023 | ||
4024 | if (n < cur_curlyx->u.curlyx.max) { /* More greed allowed? */ | |
4025 | ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor); | |
4026 | cur_curlyx->u.curlyx.lastloc = locinput; | |
4027 | REGCP_SET(ST.lastcp); | |
4028 | PUSH_STATE_GOTO(WHILEM_A_max, cur_curlyx->u.curlyx.A); | |
4029 | /* NOTREACHED */ | |
4030 | } | |
4031 | goto do_whilem_B_max; | |
4032 | } | |
4033 | /* NOTREACHED */ | |
4034 | ||
4035 | case WHILEM_B_min: /* just matched B in a minimal match */ | |
4036 | case WHILEM_B_max: /* just matched B in a maximal match */ | |
4037 | cur_curlyx = ST.save_curlyx; | |
4038 | sayYES; | |
4039 | /* NOTREACHED */ | |
4040 | ||
4041 | case WHILEM_B_max_fail: /* just failed to match B in a maximal match */ | |
4042 | cur_curlyx = ST.save_curlyx; | |
4043 | cur_curlyx->u.curlyx.lastloc = ST.save_lastloc; | |
4044 | cur_curlyx->u.curlyx.count--; | |
4045 | CACHEsayNO; | |
4046 | /* NOTREACHED */ | |
4047 | ||
4048 | case WHILEM_A_min_fail: /* just failed to match A in a minimal match */ | |
4049 | REGCP_UNWIND(ST.lastcp); | |
4050 | regcppop(rex); | |
4051 | /* FALL THROUGH */ | |
4052 | case WHILEM_A_pre_fail: /* just failed to match even minimal A */ | |
4053 | cur_curlyx->u.curlyx.lastloc = ST.save_lastloc; | |
4054 | cur_curlyx->u.curlyx.count--; | |
4055 | CACHEsayNO; | |
4056 | /* NOTREACHED */ | |
4057 | ||
4058 | case WHILEM_A_max_fail: /* just failed to match A in a maximal match */ | |
4059 | REGCP_UNWIND(ST.lastcp); | |
4060 | regcppop(rex); /* Restore some previous $<digit>s? */ | |
4061 | PL_reginput = locinput; | |
4062 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, | |
4063 | "%*s whilem: failed, trying continuation...\n", | |
4064 | REPORT_CODE_OFF+depth*2, "") | |
4065 | ); | |
4066 | do_whilem_B_max: | |
4067 | if (cur_curlyx->u.curlyx.count >= REG_INFTY | |
4068 | && ckWARN(WARN_REGEXP) | |
4069 | && !(PL_reg_flags & RF_warned)) | |
4070 | { | |
4071 | PL_reg_flags |= RF_warned; | |
4072 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s limit (%d) exceeded", | |
4073 | "Complex regular subexpression recursion", | |
4074 | REG_INFTY - 1); | |
4075 | } | |
4076 | ||
4077 | /* now try B */ | |
4078 | ST.save_curlyx = cur_curlyx; | |
4079 | cur_curlyx = cur_curlyx->u.curlyx.prev_curlyx; | |
4080 | PUSH_YES_STATE_GOTO(WHILEM_B_max, ST.save_curlyx->u.curlyx.B); | |
4081 | /* NOTREACHED */ | |
4082 | ||
4083 | case WHILEM_B_min_fail: /* just failed to match B in a minimal match */ | |
4084 | cur_curlyx = ST.save_curlyx; | |
4085 | REGCP_UNWIND(ST.lastcp); | |
4086 | regcppop(rex); | |
4087 | ||
4088 | if (cur_curlyx->u.curlyx.count >= cur_curlyx->u.curlyx.max) { | |
4089 | /* Maximum greed exceeded */ | |
4090 | if (cur_curlyx->u.curlyx.count >= REG_INFTY | |
4091 | && ckWARN(WARN_REGEXP) | |
4092 | && !(PL_reg_flags & RF_warned)) | |
4093 | { | |
3280af22 | 4094 | PL_reg_flags |= RF_warned; |
c476f425 DM |
4095 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), |
4096 | "%s limit (%d) exceeded", | |
4097 | "Complex regular subexpression recursion", | |
4098 | REG_INFTY - 1); | |
a0d0e21e | 4099 | } |
c476f425 | 4100 | cur_curlyx->u.curlyx.count--; |
3ab3c9b4 | 4101 | CACHEsayNO; |
a0d0e21e | 4102 | } |
c476f425 DM |
4103 | |
4104 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, | |
4105 | "%*s trying longer...\n", REPORT_CODE_OFF+depth*2, "") | |
4106 | ); | |
4107 | /* Try grabbing another A and see if it helps. */ | |
4108 | PL_reginput = locinput; | |
4109 | cur_curlyx->u.curlyx.lastloc = locinput; | |
4110 | ST.cp = regcppush(cur_curlyx->u.curlyx.parenfloor); | |
4111 | REGCP_SET(ST.lastcp); | |
4112 | PUSH_STATE_GOTO(WHILEM_A_min, ST.save_curlyx->u.curlyx.A); | |
5f66b61c | 4113 | /* NOTREACHED */ |
40a82448 DM |
4114 | |
4115 | #undef ST | |
4116 | #define ST st->u.branch | |
4117 | ||
4118 | case BRANCHJ: /* /(...|A|...)/ with long next pointer */ | |
c277df42 IZ |
4119 | next = scan + ARG(scan); |
4120 | if (next == scan) | |
4121 | next = NULL; | |
40a82448 DM |
4122 | scan = NEXTOPER(scan); |
4123 | /* FALL THROUGH */ | |
c277df42 | 4124 | |
40a82448 DM |
4125 | case BRANCH: /* /(...|A|...)/ */ |
4126 | scan = NEXTOPER(scan); /* scan now points to inner node */ | |
5d458dd8 YO |
4127 | if ((!next || (OP(next) != BRANCH && OP(next) != BRANCHJ)) |
4128 | && !has_cutgroup) | |
4129 | { | |
40a82448 DM |
4130 | /* last branch; skip state push and jump direct to node */ |
4131 | continue; | |
5d458dd8 | 4132 | } |
40a82448 DM |
4133 | ST.lastparen = *PL_reglastparen; |
4134 | ST.next_branch = next; | |
4135 | REGCP_SET(ST.cp); | |
4136 | PL_reginput = locinput; | |
02db2b7b | 4137 | |
40a82448 | 4138 | /* Now go into the branch */ |
5d458dd8 YO |
4139 | if (has_cutgroup) { |
4140 | PUSH_YES_STATE_GOTO(BRANCH_next, scan); | |
4141 | } else { | |
4142 | PUSH_STATE_GOTO(BRANCH_next, scan); | |
4143 | } | |
40a82448 | 4144 | /* NOTREACHED */ |
5d458dd8 YO |
4145 | case CUTGROUP: |
4146 | PL_reginput = locinput; | |
4147 | sv_yes_mark = st->u.mark.mark_name = scan->flags ? NULL : | |
f8fc2ecf | 4148 | (SV*)rexi->data->data[ ARG( scan ) ]; |
5d458dd8 YO |
4149 | PUSH_STATE_GOTO(CUTGROUP_next,next); |
4150 | /* NOTREACHED */ | |
4151 | case CUTGROUP_next_fail: | |
4152 | do_cutgroup = 1; | |
4153 | no_final = 1; | |
4154 | if (st->u.mark.mark_name) | |
4155 | sv_commit = st->u.mark.mark_name; | |
4156 | sayNO; | |
4157 | /* NOTREACHED */ | |
4158 | case BRANCH_next: | |
4159 | sayYES; | |
4160 | /* NOTREACHED */ | |
40a82448 | 4161 | case BRANCH_next_fail: /* that branch failed; try the next, if any */ |
5d458dd8 YO |
4162 | if (do_cutgroup) { |
4163 | do_cutgroup = 0; | |
4164 | no_final = 0; | |
4165 | } | |
40a82448 DM |
4166 | REGCP_UNWIND(ST.cp); |
4167 | for (n = *PL_reglastparen; n > ST.lastparen; n--) | |
4168 | PL_regendp[n] = -1; | |
4169 | *PL_reglastparen = n; | |
0a4db386 | 4170 | /*dmq: *PL_reglastcloseparen = n; */ |
40a82448 DM |
4171 | scan = ST.next_branch; |
4172 | /* no more branches? */ | |
5d458dd8 YO |
4173 | if (!scan || (OP(scan) != BRANCH && OP(scan) != BRANCHJ)) { |
4174 | DEBUG_EXECUTE_r({ | |
4175 | PerlIO_printf( Perl_debug_log, | |
4176 | "%*s %sBRANCH failed...%s\n", | |
4177 | REPORT_CODE_OFF+depth*2, "", | |
4178 | PL_colors[4], | |
4179 | PL_colors[5] ); | |
4180 | }); | |
4181 | sayNO_SILENT; | |
4182 | } | |
40a82448 DM |
4183 | continue; /* execute next BRANCH[J] op */ |
4184 | /* NOTREACHED */ | |
4185 | ||
a0d0e21e | 4186 | case MINMOD: |
24d3c4a9 | 4187 | minmod = 1; |
a0d0e21e | 4188 | break; |
40a82448 DM |
4189 | |
4190 | #undef ST | |
4191 | #define ST st->u.curlym | |
4192 | ||
4193 | case CURLYM: /* /A{m,n}B/ where A is fixed-length */ | |
4194 | ||
4195 | /* This is an optimisation of CURLYX that enables us to push | |
4196 | * only a single backtracking state, no matter now many matches | |
4197 | * there are in {m,n}. It relies on the pattern being constant | |
4198 | * length, with no parens to influence future backrefs | |
4199 | */ | |
4200 | ||
4201 | ST.me = scan; | |
dc45a647 | 4202 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
40a82448 DM |
4203 | |
4204 | /* if paren positive, emulate an OPEN/CLOSE around A */ | |
4205 | if (ST.me->flags) { | |
3b6647e0 | 4206 | U32 paren = ST.me->flags; |
40a82448 DM |
4207 | if (paren > PL_regsize) |
4208 | PL_regsize = paren; | |
3b6647e0 | 4209 | if (paren > *PL_reglastparen) |
40a82448 | 4210 | *PL_reglastparen = paren; |
c277df42 | 4211 | scan += NEXT_OFF(scan); /* Skip former OPEN. */ |
6407bf3b | 4212 | } |
40a82448 DM |
4213 | ST.A = scan; |
4214 | ST.B = next; | |
4215 | ST.alen = 0; | |
4216 | ST.count = 0; | |
24d3c4a9 DM |
4217 | ST.minmod = minmod; |
4218 | minmod = 0; | |
40a82448 DM |
4219 | ST.c1 = CHRTEST_UNINIT; |
4220 | REGCP_SET(ST.cp); | |
6407bf3b | 4221 | |
40a82448 DM |
4222 | if (!(ST.minmod ? ARG1(ST.me) : ARG2(ST.me))) /* min/max */ |
4223 | goto curlym_do_B; | |
4224 | ||
4225 | curlym_do_A: /* execute the A in /A{m,n}B/ */ | |
6407bf3b | 4226 | PL_reginput = locinput; |
40a82448 DM |
4227 | PUSH_YES_STATE_GOTO(CURLYM_A, ST.A); /* match A */ |
4228 | /* NOTREACHED */ | |
5f80c4cf | 4229 | |
40a82448 DM |
4230 | case CURLYM_A: /* we've just matched an A */ |
4231 | locinput = st->locinput; | |
4232 | nextchr = UCHARAT(locinput); | |
4233 | ||
4234 | ST.count++; | |
4235 | /* after first match, determine A's length: u.curlym.alen */ | |
4236 | if (ST.count == 1) { | |
4237 | if (PL_reg_match_utf8) { | |
4238 | char *s = locinput; | |
4239 | while (s < PL_reginput) { | |
4240 | ST.alen++; | |
4241 | s += UTF8SKIP(s); | |
4242 | } | |
4243 | } | |
4244 | else { | |
4245 | ST.alen = PL_reginput - locinput; | |
4246 | } | |
4247 | if (ST.alen == 0) | |
4248 | ST.count = ST.minmod ? ARG1(ST.me) : ARG2(ST.me); | |
4249 | } | |
0cadcf80 DM |
4250 | DEBUG_EXECUTE_r( |
4251 | PerlIO_printf(Perl_debug_log, | |
40a82448 | 4252 | "%*s CURLYM now matched %"IVdf" times, len=%"IVdf"...\n", |
5bc10b2c | 4253 | (int)(REPORT_CODE_OFF+(depth*2)), "", |
40a82448 | 4254 | (IV) ST.count, (IV)ST.alen) |
0cadcf80 DM |
4255 | ); |
4256 | ||
40a82448 | 4257 | locinput = PL_reginput; |
0a4db386 YO |
4258 | |
4259 | if (cur_eval && cur_eval->u.eval.close_paren && | |
24b23f37 | 4260 | cur_eval->u.eval.close_paren == (U32)ST.me->flags) |
0a4db386 YO |
4261 | goto fake_end; |
4262 | ||
4263 | if ( ST.count < (ST.minmod ? ARG1(ST.me) : ARG2(ST.me)) ) | |
40a82448 DM |
4264 | goto curlym_do_A; /* try to match another A */ |
4265 | goto curlym_do_B; /* try to match B */ | |
5f80c4cf | 4266 | |
40a82448 DM |
4267 | case CURLYM_A_fail: /* just failed to match an A */ |
4268 | REGCP_UNWIND(ST.cp); | |
0a4db386 YO |
4269 | |
4270 | if (ST.minmod || ST.count < ARG1(ST.me) /* min*/ | |
4271 | || (cur_eval && cur_eval->u.eval.close_paren && | |
24b23f37 | 4272 | cur_eval->u.eval.close_paren == (U32)ST.me->flags)) |
40a82448 | 4273 | sayNO; |
0cadcf80 | 4274 | |
40a82448 DM |
4275 | curlym_do_B: /* execute the B in /A{m,n}B/ */ |
4276 | PL_reginput = locinput; | |
4277 | if (ST.c1 == CHRTEST_UNINIT) { | |
4278 | /* calculate c1 and c2 for possible match of 1st char | |
4279 | * following curly */ | |
4280 | ST.c1 = ST.c2 = CHRTEST_VOID; | |
4281 | if (HAS_TEXT(ST.B) || JUMPABLE(ST.B)) { | |
4282 | regnode *text_node = ST.B; | |
4283 | if (! HAS_TEXT(text_node)) | |
4284 | FIND_NEXT_IMPT(text_node); | |
4285 | if (HAS_TEXT(text_node) | |
4286 | && PL_regkind[OP(text_node)] != REF) | |
4287 | { | |
4288 | ST.c1 = (U8)*STRING(text_node); | |
4289 | ST.c2 = | |
4290 | (OP(text_node) == EXACTF || OP(text_node) == REFF) | |
4291 | ? PL_fold[ST.c1] | |
4292 | : (OP(text_node) == EXACTFL || OP(text_node) == REFFL) | |
4293 | ? PL_fold_locale[ST.c1] | |
4294 | : ST.c1; | |
c277df42 | 4295 | } |
c277df42 | 4296 | } |
40a82448 DM |
4297 | } |
4298 | ||
4299 | DEBUG_EXECUTE_r( | |
4300 | PerlIO_printf(Perl_debug_log, | |
4301 | "%*s CURLYM trying tail with matches=%"IVdf"...\n", | |
5bc10b2c | 4302 | (int)(REPORT_CODE_OFF+(depth*2)), |
40a82448 DM |
4303 | "", (IV)ST.count) |
4304 | ); | |
4305 | if (ST.c1 != CHRTEST_VOID | |
4306 | && UCHARAT(PL_reginput) != ST.c1 | |
4307 | && UCHARAT(PL_reginput) != ST.c2) | |
4308 | { | |
4309 | /* simulate B failing */ | |
4310 | state_num = CURLYM_B_fail; | |
4311 | goto reenter_switch; | |
4312 | } | |
4313 | ||
4314 | if (ST.me->flags) { | |
4315 | /* mark current A as captured */ | |
4316 | I32 paren = ST.me->flags; | |
4317 | if (ST.count) { | |
4318 | PL_regstartp[paren] | |
4319 | = HOPc(PL_reginput, -ST.alen) - PL_bostr; | |
4320 | PL_regendp[paren] = PL_reginput - PL_bostr; | |
0a4db386 | 4321 | /*dmq: *PL_reglastcloseparen = paren; */ |
c277df42 | 4322 | } |
40a82448 DM |
4323 | else |
4324 | PL_regendp[paren] = -1; | |
0a4db386 | 4325 | if (cur_eval && cur_eval->u.eval.close_paren && |
24b23f37 | 4326 | cur_eval->u.eval.close_paren == (U32)ST.me->flags) |
0a4db386 YO |
4327 | { |
4328 | if (ST.count) | |
4329 | goto fake_end; | |
4330 | else | |
4331 | sayNO; | |
4332 | } | |
c277df42 | 4333 | } |
0a4db386 | 4334 | |
40a82448 | 4335 | PUSH_STATE_GOTO(CURLYM_B, ST.B); /* match B */ |
5f66b61c | 4336 | /* NOTREACHED */ |
40a82448 DM |
4337 | |
4338 | case CURLYM_B_fail: /* just failed to match a B */ | |
4339 | REGCP_UNWIND(ST.cp); | |
4340 | if (ST.minmod) { | |
4341 | if (ST.count == ARG2(ST.me) /* max */) | |
4342 | sayNO; | |
4343 | goto curlym_do_A; /* try to match a further A */ | |
4344 | } | |
4345 | /* backtrack one A */ | |
4346 | if (ST.count == ARG1(ST.me) /* min */) | |
4347 | sayNO; | |
4348 | ST.count--; | |
4349 | locinput = HOPc(locinput, -ST.alen); | |
4350 | goto curlym_do_B; /* try to match B */ | |
4351 | ||
c255a977 DM |
4352 | #undef ST |
4353 | #define ST st->u.curly | |
40a82448 | 4354 | |
c255a977 DM |
4355 | #define CURLY_SETPAREN(paren, success) \ |
4356 | if (paren) { \ | |
4357 | if (success) { \ | |
4358 | PL_regstartp[paren] = HOPc(locinput, -1) - PL_bostr; \ | |
4359 | PL_regendp[paren] = locinput - PL_bostr; \ | |
0a4db386 | 4360 | *PL_reglastcloseparen = paren; \ |
c255a977 DM |
4361 | } \ |
4362 | else \ | |
4363 | PL_regendp[paren] = -1; \ | |
4364 | } | |
4365 | ||
4366 | case STAR: /* /A*B/ where A is width 1 */ | |
4367 | ST.paren = 0; | |
4368 | ST.min = 0; | |
4369 | ST.max = REG_INFTY; | |
a0d0e21e LW |
4370 | scan = NEXTOPER(scan); |
4371 | goto repeat; | |
c255a977 DM |
4372 | case PLUS: /* /A+B/ where A is width 1 */ |
4373 | ST.paren = 0; | |
4374 | ST.min = 1; | |
4375 | ST.max = REG_INFTY; | |
c277df42 | 4376 | scan = NEXTOPER(scan); |
c255a977 DM |
4377 | goto repeat; |
4378 | case CURLYN: /* /(A){m,n}B/ where A is width 1 */ | |
4379 | ST.paren = scan->flags; /* Which paren to set */ | |
4380 | if (ST.paren > PL_regsize) | |
4381 | PL_regsize = ST.paren; | |
3b6647e0 | 4382 | if (ST.paren > *PL_reglastparen) |
c255a977 DM |
4383 | *PL_reglastparen = ST.paren; |
4384 | ST.min = ARG1(scan); /* min to match */ | |
4385 | ST.max = ARG2(scan); /* max to match */ | |
0a4db386 | 4386 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 4387 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
0a4db386 YO |
4388 | ST.min=1; |
4389 | ST.max=1; | |
4390 | } | |
c255a977 DM |
4391 | scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE); |
4392 | goto repeat; | |
4393 | case CURLY: /* /A{m,n}B/ where A is width 1 */ | |
4394 | ST.paren = 0; | |
4395 | ST.min = ARG1(scan); /* min to match */ | |
4396 | ST.max = ARG2(scan); /* max to match */ | |
4397 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; | |
c277df42 | 4398 | repeat: |
a0d0e21e LW |
4399 | /* |
4400 | * Lookahead to avoid useless match attempts | |
4401 | * when we know what character comes next. | |
c255a977 | 4402 | * |
5f80c4cf JP |
4403 | * Used to only do .*x and .*?x, but now it allows |
4404 | * for )'s, ('s and (?{ ... })'s to be in the way | |
4405 | * of the quantifier and the EXACT-like node. -- japhy | |
4406 | */ | |
4407 | ||
c255a977 DM |
4408 | if (ST.min > ST.max) /* XXX make this a compile-time check? */ |
4409 | sayNO; | |
cca55fe3 | 4410 | if (HAS_TEXT(next) || JUMPABLE(next)) { |
5f80c4cf JP |
4411 | U8 *s; |
4412 | regnode *text_node = next; | |
4413 | ||
3dab1dad YO |
4414 | if (! HAS_TEXT(text_node)) |
4415 | FIND_NEXT_IMPT(text_node); | |
5f80c4cf | 4416 | |
9e137952 | 4417 | if (! HAS_TEXT(text_node)) |
c255a977 | 4418 | ST.c1 = ST.c2 = CHRTEST_VOID; |
5f80c4cf | 4419 | else { |
3dab1dad | 4420 | if (PL_regkind[OP(text_node)] == REF) { |
c255a977 | 4421 | ST.c1 = ST.c2 = CHRTEST_VOID; |
44a68960 | 4422 | goto assume_ok_easy; |
cca55fe3 | 4423 | } |
be8e71aa YO |
4424 | else |
4425 | s = (U8*)STRING(text_node); | |
5f80c4cf JP |
4426 | |
4427 | if (!UTF) { | |
c255a977 | 4428 | ST.c2 = ST.c1 = *s; |
f65d3ee7 | 4429 | if (OP(text_node) == EXACTF || OP(text_node) == REFF) |
c255a977 | 4430 | ST.c2 = PL_fold[ST.c1]; |
f65d3ee7 | 4431 | else if (OP(text_node) == EXACTFL || OP(text_node) == REFFL) |
c255a977 | 4432 | ST.c2 = PL_fold_locale[ST.c1]; |
1aa99e6b | 4433 | } |
5f80c4cf | 4434 | else { /* UTF */ |
f65d3ee7 | 4435 | if (OP(text_node) == EXACTF || OP(text_node) == REFF) { |
a2a2844f | 4436 | STRLEN ulen1, ulen2; |
89ebb4a3 JH |
4437 | U8 tmpbuf1[UTF8_MAXBYTES_CASE+1]; |
4438 | U8 tmpbuf2[UTF8_MAXBYTES_CASE+1]; | |
a2a2844f JH |
4439 | |
4440 | to_utf8_lower((U8*)s, tmpbuf1, &ulen1); | |
4441 | to_utf8_upper((U8*)s, tmpbuf2, &ulen2); | |
e294cc5d JH |
4442 | #ifdef EBCDIC |
4443 | ST.c1 = utf8n_to_uvchr(tmpbuf1, UTF8_MAXLEN, 0, | |
4444 | ckWARN(WARN_UTF8) ? | |
4445 | 0 : UTF8_ALLOW_ANY); | |
4446 | ST.c2 = utf8n_to_uvchr(tmpbuf2, UTF8_MAXLEN, 0, | |
4447 | ckWARN(WARN_UTF8) ? | |
4448 | 0 : UTF8_ALLOW_ANY); | |
4449 | #else | |
c255a977 | 4450 | ST.c1 = utf8n_to_uvuni(tmpbuf1, UTF8_MAXBYTES, 0, |
e294cc5d | 4451 | uniflags); |
c255a977 | 4452 | ST.c2 = utf8n_to_uvuni(tmpbuf2, UTF8_MAXBYTES, 0, |
e294cc5d JH |
4453 | uniflags); |
4454 | #endif | |
5f80c4cf JP |
4455 | } |
4456 | else { | |
c255a977 | 4457 | ST.c2 = ST.c1 = utf8n_to_uvchr(s, UTF8_MAXBYTES, 0, |
041457d9 | 4458 | uniflags); |
5f80c4cf | 4459 | } |
1aa99e6b IH |
4460 | } |
4461 | } | |
bbce6d69 | 4462 | } |
a0d0e21e | 4463 | else |
c255a977 | 4464 | ST.c1 = ST.c2 = CHRTEST_VOID; |
cca55fe3 | 4465 | assume_ok_easy: |
c255a977 DM |
4466 | |
4467 | ST.A = scan; | |
4468 | ST.B = next; | |
3280af22 | 4469 | PL_reginput = locinput; |
24d3c4a9 DM |
4470 | if (minmod) { |
4471 | minmod = 0; | |
e2e6a0f1 | 4472 | if (ST.min && regrepeat(rex, ST.A, ST.min, depth) < ST.min) |
4633a7c4 | 4473 | sayNO; |
c255a977 | 4474 | ST.count = ST.min; |
a0ed51b3 | 4475 | locinput = PL_reginput; |
c255a977 DM |
4476 | REGCP_SET(ST.cp); |
4477 | if (ST.c1 == CHRTEST_VOID) | |
4478 | goto curly_try_B_min; | |
4479 | ||
4480 | ST.oldloc = locinput; | |
4481 | ||
4482 | /* set ST.maxpos to the furthest point along the | |
4483 | * string that could possibly match */ | |
4484 | if (ST.max == REG_INFTY) { | |
4485 | ST.maxpos = PL_regeol - 1; | |
4486 | if (do_utf8) | |
4487 | while (UTF8_IS_CONTINUATION(*(U8*)ST.maxpos)) | |
4488 | ST.maxpos--; | |
4489 | } | |
4490 | else if (do_utf8) { | |
4491 | int m = ST.max - ST.min; | |
4492 | for (ST.maxpos = locinput; | |
4493 | m >0 && ST.maxpos + UTF8SKIP(ST.maxpos) <= PL_regeol; m--) | |
4494 | ST.maxpos += UTF8SKIP(ST.maxpos); | |
4495 | } | |
4496 | else { | |
4497 | ST.maxpos = locinput + ST.max - ST.min; | |
4498 | if (ST.maxpos >= PL_regeol) | |
4499 | ST.maxpos = PL_regeol - 1; | |
4500 | } | |
4501 | goto curly_try_B_min_known; | |
4502 | ||
4503 | } | |
4504 | else { | |
e2e6a0f1 | 4505 | ST.count = regrepeat(rex, ST.A, ST.max, depth); |
c255a977 DM |
4506 | locinput = PL_reginput; |
4507 | if (ST.count < ST.min) | |
4508 | sayNO; | |
4509 | if ((ST.count > ST.min) | |
4510 | && (PL_regkind[OP(ST.B)] == EOL) && (OP(ST.B) != MEOL)) | |
4511 | { | |
4512 | /* A{m,n} must come at the end of the string, there's | |
4513 | * no point in backing off ... */ | |
4514 | ST.min = ST.count; | |
4515 | /* ...except that $ and \Z can match before *and* after | |
4516 | newline at the end. Consider "\n\n" =~ /\n+\Z\n/. | |
4517 | We may back off by one in this case. */ | |
4518 | if (UCHARAT(PL_reginput - 1) == '\n' && OP(ST.B) != EOS) | |
4519 | ST.min--; | |
4520 | } | |
4521 | REGCP_SET(ST.cp); | |
4522 | goto curly_try_B_max; | |
4523 | } | |
4524 | /* NOTREACHED */ | |
4525 | ||
4526 | ||
4527 | case CURLY_B_min_known_fail: | |
4528 | /* failed to find B in a non-greedy match where c1,c2 valid */ | |
4529 | if (ST.paren && ST.count) | |
4530 | PL_regendp[ST.paren] = -1; | |
4531 | ||
4532 | PL_reginput = locinput; /* Could be reset... */ | |
4533 | REGCP_UNWIND(ST.cp); | |
4534 | /* Couldn't or didn't -- move forward. */ | |
4535 | ST.oldloc = locinput; | |
4536 | if (do_utf8) | |
4537 | locinput += UTF8SKIP(locinput); | |
4538 | else | |
4539 | locinput++; | |
4540 | ST.count++; | |
4541 | curly_try_B_min_known: | |
4542 | /* find the next place where 'B' could work, then call B */ | |
4543 | { | |
4544 | int n; | |
4545 | if (do_utf8) { | |
4546 | n = (ST.oldloc == locinput) ? 0 : 1; | |
4547 | if (ST.c1 == ST.c2) { | |
4548 | STRLEN len; | |
4549 | /* set n to utf8_distance(oldloc, locinput) */ | |
4550 | while (locinput <= ST.maxpos && | |
4551 | utf8n_to_uvchr((U8*)locinput, | |
4552 | UTF8_MAXBYTES, &len, | |
4553 | uniflags) != (UV)ST.c1) { | |
4554 | locinput += len; | |
4555 | n++; | |
4556 | } | |
1aa99e6b IH |
4557 | } |
4558 | else { | |
c255a977 DM |
4559 | /* set n to utf8_distance(oldloc, locinput) */ |
4560 | while (locinput <= ST.maxpos) { | |
4561 | STRLEN len; | |
4562 | const UV c = utf8n_to_uvchr((U8*)locinput, | |
4563 | UTF8_MAXBYTES, &len, | |
4564 | uniflags); | |
4565 | if (c == (UV)ST.c1 || c == (UV)ST.c2) | |
4566 | break; | |
4567 | locinput += len; | |
4568 | n++; | |
1aa99e6b | 4569 | } |
0fe9bf95 IZ |
4570 | } |
4571 | } | |
c255a977 DM |
4572 | else { |
4573 | if (ST.c1 == ST.c2) { | |
4574 | while (locinput <= ST.maxpos && | |
4575 | UCHARAT(locinput) != ST.c1) | |
4576 | locinput++; | |
bbce6d69 | 4577 | } |
c255a977 DM |
4578 | else { |
4579 | while (locinput <= ST.maxpos | |
4580 | && UCHARAT(locinput) != ST.c1 | |
4581 | && UCHARAT(locinput) != ST.c2) | |
4582 | locinput++; | |
a0ed51b3 | 4583 | } |
c255a977 DM |
4584 | n = locinput - ST.oldloc; |
4585 | } | |
4586 | if (locinput > ST.maxpos) | |
4587 | sayNO; | |
4588 | /* PL_reginput == oldloc now */ | |
4589 | if (n) { | |
4590 | ST.count += n; | |
e2e6a0f1 | 4591 | if (regrepeat(rex, ST.A, n, depth) < n) |
4633a7c4 | 4592 | sayNO; |
a0d0e21e | 4593 | } |
c255a977 DM |
4594 | PL_reginput = locinput; |
4595 | CURLY_SETPAREN(ST.paren, ST.count); | |
0a4db386 | 4596 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 4597 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
0a4db386 YO |
4598 | goto fake_end; |
4599 | } | |
c255a977 | 4600 | PUSH_STATE_GOTO(CURLY_B_min_known, ST.B); |
a0d0e21e | 4601 | } |
c255a977 DM |
4602 | /* NOTREACHED */ |
4603 | ||
4604 | ||
4605 | case CURLY_B_min_fail: | |
4606 | /* failed to find B in a non-greedy match where c1,c2 invalid */ | |
4607 | if (ST.paren && ST.count) | |
4608 | PL_regendp[ST.paren] = -1; | |
4609 | ||
4610 | REGCP_UNWIND(ST.cp); | |
4611 | /* failed -- move forward one */ | |
4612 | PL_reginput = locinput; | |
e2e6a0f1 | 4613 | if (regrepeat(rex, ST.A, 1, depth)) { |
c255a977 | 4614 | ST.count++; |
a0ed51b3 | 4615 | locinput = PL_reginput; |
c255a977 DM |
4616 | if (ST.count <= ST.max || (ST.max == REG_INFTY && |
4617 | ST.count > 0)) /* count overflow ? */ | |
15272685 | 4618 | { |
c255a977 DM |
4619 | curly_try_B_min: |
4620 | CURLY_SETPAREN(ST.paren, ST.count); | |
0a4db386 | 4621 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 4622 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
0a4db386 YO |
4623 | goto fake_end; |
4624 | } | |
c255a977 | 4625 | PUSH_STATE_GOTO(CURLY_B_min, ST.B); |
a0d0e21e LW |
4626 | } |
4627 | } | |
4633a7c4 | 4628 | sayNO; |
c255a977 DM |
4629 | /* NOTREACHED */ |
4630 | ||
4631 | ||
4632 | curly_try_B_max: | |
4633 | /* a successful greedy match: now try to match B */ | |
40d049e4 | 4634 | if (cur_eval && cur_eval->u.eval.close_paren && |
86413ec0 | 4635 | cur_eval->u.eval.close_paren == (U32)ST.paren) { |
40d049e4 YO |
4636 | goto fake_end; |
4637 | } | |
c255a977 DM |
4638 | { |
4639 | UV c = 0; | |
4640 | if (ST.c1 != CHRTEST_VOID) | |
4641 | c = do_utf8 ? utf8n_to_uvchr((U8*)PL_reginput, | |
4642 | UTF8_MAXBYTES, 0, uniflags) | |
466787eb | 4643 | : (UV) UCHARAT(PL_reginput); |
c255a977 DM |
4644 | /* If it could work, try it. */ |
4645 | if (ST.c1 == CHRTEST_VOID || c == (UV)ST.c1 || c == (UV)ST.c2) { | |
4646 | CURLY_SETPAREN(ST.paren, ST.count); | |
4647 | PUSH_STATE_GOTO(CURLY_B_max, ST.B); | |
4648 | /* NOTREACHED */ | |
4649 | } | |
4650 | } | |
4651 | /* FALL THROUGH */ | |
4652 | case CURLY_B_max_fail: | |
4653 | /* failed to find B in a greedy match */ | |
4654 | if (ST.paren && ST.count) | |
4655 | PL_regendp[ST.paren] = -1; | |
4656 | ||
4657 | REGCP_UNWIND(ST.cp); | |
4658 | /* back up. */ | |
4659 | if (--ST.count < ST.min) | |
4660 | sayNO; | |
4661 | PL_reginput = locinput = HOPc(locinput, -1); | |
4662 | goto curly_try_B_max; | |
4663 | ||
4664 | #undef ST | |
4665 | ||
a0d0e21e | 4666 | case END: |
6bda09f9 | 4667 | fake_end: |
faec1544 DM |
4668 | if (cur_eval) { |
4669 | /* we've just finished A in /(??{A})B/; now continue with B */ | |
4670 | I32 tmpix; | |
4671 | ||
4672 | ||
4673 | st->u.eval.toggle_reg_flags | |
4674 | = cur_eval->u.eval.toggle_reg_flags; | |
4675 | PL_reg_flags ^= st->u.eval.toggle_reg_flags; | |
4676 | ||
4677 | st->u.eval.prev_rex = rex; /* inner */ | |
f8fc2ecf YO |
4678 | rex = cur_eval->u.eval.prev_rex; /* outer */ |
4679 | rexi = RXi_GET(rex); | |
faec1544 DM |
4680 | cur_curlyx = cur_eval->u.eval.prev_curlyx; |
4681 | ReREFCNT_inc(rex); | |
4682 | st->u.eval.cp = regcppush(0); /* Save *all* the positions. */ | |
4683 | REGCP_SET(st->u.eval.lastcp); | |
4684 | PL_reginput = locinput; | |
4685 | ||
4686 | /* Restore parens of the outer rex without popping the | |
4687 | * savestack */ | |
4688 | tmpix = PL_savestack_ix; | |
4689 | PL_savestack_ix = cur_eval->u.eval.lastcp; | |
4690 | regcppop(rex); | |
4691 | PL_savestack_ix = tmpix; | |
4692 | ||
4693 | st->u.eval.prev_eval = cur_eval; | |
4694 | cur_eval = cur_eval->u.eval.prev_eval; | |
4695 | DEBUG_EXECUTE_r( | |
2a49f0f5 JH |
4696 | PerlIO_printf(Perl_debug_log, "%*s EVAL trying tail ... %"UVxf"\n", |
4697 | REPORT_CODE_OFF+depth*2, "",PTR2UV(cur_eval));); | |
faec1544 DM |
4698 | PUSH_YES_STATE_GOTO(EVAL_AB, |
4699 | st->u.eval.prev_eval->u.eval.B); /* match B */ | |
4700 | } | |
4701 | ||
3b0527fe | 4702 | if (locinput < reginfo->till) { |
a3621e74 | 4703 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, |
7821416a IZ |
4704 | "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n", |
4705 | PL_colors[4], | |
4706 | (long)(locinput - PL_reg_starttry), | |
3b0527fe | 4707 | (long)(reginfo->till - PL_reg_starttry), |
7821416a | 4708 | PL_colors[5])); |
58e23c8d | 4709 | |
262b90c4 | 4710 | sayNO_SILENT; /* Cannot match: too short. */ |
7821416a IZ |
4711 | } |
4712 | PL_reginput = locinput; /* put where regtry can find it */ | |
262b90c4 | 4713 | sayYES; /* Success! */ |
dad79028 DM |
4714 | |
4715 | case SUCCEED: /* successful SUSPEND/UNLESSM/IFMATCH/CURLYM */ | |
4716 | DEBUG_EXECUTE_r( | |
4717 | PerlIO_printf(Perl_debug_log, | |
4718 | "%*s %ssubpattern success...%s\n", | |
5bc10b2c | 4719 | REPORT_CODE_OFF+depth*2, "", PL_colors[4], PL_colors[5])); |
3280af22 | 4720 | PL_reginput = locinput; /* put where regtry can find it */ |
262b90c4 | 4721 | sayYES; /* Success! */ |
dad79028 | 4722 | |
40a82448 DM |
4723 | #undef ST |
4724 | #define ST st->u.ifmatch | |
4725 | ||
4726 | case SUSPEND: /* (?>A) */ | |
4727 | ST.wanted = 1; | |
9fe1d20c | 4728 | PL_reginput = locinput; |
9041c2e3 | 4729 | goto do_ifmatch; |
dad79028 | 4730 | |
40a82448 DM |
4731 | case UNLESSM: /* -ve lookaround: (?!A), or with flags, (?<!A) */ |
4732 | ST.wanted = 0; | |
dad79028 DM |
4733 | goto ifmatch_trivial_fail_test; |
4734 | ||
40a82448 DM |
4735 | case IFMATCH: /* +ve lookaround: (?=A), or with flags, (?<=A) */ |
4736 | ST.wanted = 1; | |
dad79028 | 4737 | ifmatch_trivial_fail_test: |
a0ed51b3 | 4738 | if (scan->flags) { |
52657f30 | 4739 | char * const s = HOPBACKc(locinput, scan->flags); |
dad79028 DM |
4740 | if (!s) { |
4741 | /* trivial fail */ | |
24d3c4a9 DM |
4742 | if (logical) { |
4743 | logical = 0; | |
4744 | sw = 1 - (bool)ST.wanted; | |
dad79028 | 4745 | } |
40a82448 | 4746 | else if (ST.wanted) |
dad79028 DM |
4747 | sayNO; |
4748 | next = scan + ARG(scan); | |
4749 | if (next == scan) | |
4750 | next = NULL; | |
4751 | break; | |
4752 | } | |
efb30f32 | 4753 | PL_reginput = s; |
a0ed51b3 LW |
4754 | } |
4755 | else | |
4756 | PL_reginput = locinput; | |
4757 | ||
c277df42 | 4758 | do_ifmatch: |
40a82448 | 4759 | ST.me = scan; |
24d3c4a9 | 4760 | ST.logical = logical; |
40a82448 DM |
4761 | /* execute body of (?...A) */ |
4762 | PUSH_YES_STATE_GOTO(IFMATCH_A, NEXTOPER(NEXTOPER(scan))); | |
4763 | /* NOTREACHED */ | |
4764 | ||
4765 | case IFMATCH_A_fail: /* body of (?...A) failed */ | |
4766 | ST.wanted = !ST.wanted; | |
4767 | /* FALL THROUGH */ | |
4768 | ||
4769 | case IFMATCH_A: /* body of (?...A) succeeded */ | |
24d3c4a9 DM |
4770 | if (ST.logical) { |
4771 | sw = (bool)ST.wanted; | |
40a82448 DM |
4772 | } |
4773 | else if (!ST.wanted) | |
4774 | sayNO; | |
4775 | ||
4776 | if (OP(ST.me) == SUSPEND) | |
4777 | locinput = PL_reginput; | |
4778 | else { | |
4779 | locinput = PL_reginput = st->locinput; | |
4780 | nextchr = UCHARAT(locinput); | |
4781 | } | |
4782 | scan = ST.me + ARG(ST.me); | |
4783 | if (scan == ST.me) | |
4784 | scan = NULL; | |
4785 | continue; /* execute B */ | |
4786 | ||
4787 | #undef ST | |
dad79028 | 4788 | |
c277df42 | 4789 | case LONGJMP: |
c277df42 IZ |
4790 | next = scan + ARG(scan); |
4791 | if (next == scan) | |
4792 | next = NULL; | |
a0d0e21e | 4793 | break; |
54612592 | 4794 | case COMMIT: |
e2e6a0f1 YO |
4795 | reginfo->cutpoint = PL_regeol; |
4796 | /* FALLTHROUGH */ | |
5d458dd8 | 4797 | case PRUNE: |
24b23f37 | 4798 | PL_reginput = locinput; |
e2e6a0f1 | 4799 | if (!scan->flags) |
f8fc2ecf | 4800 | sv_yes_mark = sv_commit = (SV*)rexi->data->data[ ARG( scan ) ]; |
54612592 YO |
4801 | PUSH_STATE_GOTO(COMMIT_next,next); |
4802 | /* NOTREACHED */ | |
4803 | case COMMIT_next_fail: | |
4804 | no_final = 1; | |
4805 | /* FALLTHROUGH */ | |
7f69552c YO |
4806 | case OPFAIL: |
4807 | sayNO; | |
e2e6a0f1 YO |
4808 | /* NOTREACHED */ |
4809 | ||
4810 | #define ST st->u.mark | |
4811 | case MARKPOINT: | |
4812 | ST.prev_mark = mark_state; | |
5d458dd8 | 4813 | ST.mark_name = sv_commit = sv_yes_mark |
f8fc2ecf | 4814 | = (SV*)rexi->data->data[ ARG( scan ) ]; |
e2e6a0f1 YO |
4815 | mark_state = st; |
4816 | ST.mark_loc = PL_reginput = locinput; | |
4817 | PUSH_YES_STATE_GOTO(MARKPOINT_next,next); | |
4818 | /* NOTREACHED */ | |
4819 | case MARKPOINT_next: | |
4820 | mark_state = ST.prev_mark; | |
4821 | sayYES; | |
4822 | /* NOTREACHED */ | |
4823 | case MARKPOINT_next_fail: | |
5d458dd8 | 4824 | if (popmark && sv_eq(ST.mark_name,popmark)) |
e2e6a0f1 YO |
4825 | { |
4826 | if (ST.mark_loc > startpoint) | |
4827 | reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1); | |
4828 | popmark = NULL; /* we found our mark */ | |
4829 | sv_commit = ST.mark_name; | |
4830 | ||
4831 | DEBUG_EXECUTE_r({ | |
5d458dd8 | 4832 | PerlIO_printf(Perl_debug_log, |
e2e6a0f1 YO |
4833 | "%*s %ssetting cutpoint to mark:%"SVf"...%s\n", |
4834 | REPORT_CODE_OFF+depth*2, "", | |
4835 | PL_colors[4], sv_commit, PL_colors[5]); | |
e2e6a0f1 YO |
4836 | }); |
4837 | } | |
4838 | mark_state = ST.prev_mark; | |
5d458dd8 YO |
4839 | sv_yes_mark = mark_state ? |
4840 | mark_state->u.mark.mark_name : NULL; | |
e2e6a0f1 YO |
4841 | sayNO; |
4842 | /* NOTREACHED */ | |
5d458dd8 YO |
4843 | case SKIP: |
4844 | PL_reginput = locinput; | |
4845 | if (scan->flags) { | |
4846 | /* (*CUT) : if we fail we cut here*/ | |
4847 | ST.mark_name = NULL; | |
e2e6a0f1 | 4848 | ST.mark_loc = locinput; |
5d458dd8 YO |
4849 | PUSH_STATE_GOTO(SKIP_next,next); |
4850 | } else { | |
4851 | /* (*CUT:NAME) : if there is a (*MARK:NAME) fail where it was, | |
4852 | otherwise do nothing. Meaning we need to scan | |
4853 | */ | |
4854 | regmatch_state *cur = mark_state; | |
f8fc2ecf | 4855 | SV *find = (SV*)rexi->data->data[ ARG( scan ) ]; |
5d458dd8 YO |
4856 | |
4857 | while (cur) { | |
4858 | if ( sv_eq( cur->u.mark.mark_name, | |
4859 | find ) ) | |
4860 | { | |
4861 | ST.mark_name = find; | |
4862 | PUSH_STATE_GOTO( SKIP_next, next ); | |
4863 | } | |
4864 | cur = cur->u.mark.prev_mark; | |
4865 | } | |
e2e6a0f1 | 4866 | } |
5d458dd8 YO |
4867 | /* Didn't find our (*MARK:NAME) so ignore this (*CUT:NAME) */ |
4868 | break; | |
4869 | case SKIP_next_fail: | |
4870 | if (ST.mark_name) { | |
4871 | /* (*CUT:NAME) - Set up to search for the name as we | |
4872 | collapse the stack*/ | |
4873 | popmark = ST.mark_name; | |
4874 | } else { | |
4875 | /* (*CUT) - No name, we cut here.*/ | |
e2e6a0f1 YO |
4876 | if (ST.mark_loc > startpoint) |
4877 | reginfo->cutpoint = HOPBACKc(ST.mark_loc, 1); | |
5d458dd8 YO |
4878 | /* but we set sv_commit to latest mark_name if there |
4879 | is one so they can test to see how things lead to this | |
4880 | cut */ | |
4881 | if (mark_state) | |
4882 | sv_commit=mark_state->u.mark.mark_name; | |
4883 | } | |
e2e6a0f1 YO |
4884 | no_final = 1; |
4885 | sayNO; | |
4886 | /* NOTREACHED */ | |
4887 | #undef ST | |
4888 | ||
a0d0e21e | 4889 | default: |
b900a521 | 4890 | PerlIO_printf(Perl_error_log, "%"UVxf" %d\n", |
d7d93a81 | 4891 | PTR2UV(scan), OP(scan)); |
cea2e8a9 | 4892 | Perl_croak(aTHX_ "regexp memory corruption"); |
5d458dd8 YO |
4893 | |
4894 | } /* end switch */ | |
95b24440 | 4895 | |
5d458dd8 YO |
4896 | /* switch break jumps here */ |
4897 | scan = next; /* prepare to execute the next op and ... */ | |
4898 | continue; /* ... jump back to the top, reusing st */ | |
95b24440 DM |
4899 | /* NOTREACHED */ |
4900 | ||
40a82448 DM |
4901 | push_yes_state: |
4902 | /* push a state that backtracks on success */ | |
4903 | st->u.yes.prev_yes_state = yes_state; | |
4904 | yes_state = st; | |
4905 | /* FALL THROUGH */ | |
4906 | push_state: | |
4907 | /* push a new regex state, then continue at scan */ | |
4908 | { | |
4909 | regmatch_state *newst; | |
4910 | ||
24b23f37 YO |
4911 | DEBUG_STACK_r({ |
4912 | regmatch_state *cur = st; | |
4913 | regmatch_state *curyes = yes_state; | |
4914 | int curd = depth; | |
4915 | regmatch_slab *slab = PL_regmatch_slab; | |
4916 | for (;curd > -1;cur--,curd--) { | |
4917 | if (cur < SLAB_FIRST(slab)) { | |
4918 | slab = slab->prev; | |
4919 | cur = SLAB_LAST(slab); | |
4920 | } | |
4921 | PerlIO_printf(Perl_error_log, "%*s#%-3d %-10s %s\n", | |
4922 | REPORT_CODE_OFF + 2 + depth * 2,"", | |
4923 | curd, reg_name[cur->resume_state], | |
4924 | (curyes == cur) ? "yes" : "" | |
4925 | ); | |
4926 | if (curyes == cur) | |
4927 | curyes = cur->u.yes.prev_yes_state; | |
4928 | } | |
4929 | } else | |
4930 | DEBUG_STATE_pp("push") | |
4931 | ); | |
40a82448 | 4932 | depth++; |
40a82448 DM |
4933 | st->locinput = locinput; |
4934 | newst = st+1; | |
4935 | if (newst > SLAB_LAST(PL_regmatch_slab)) | |
4936 | newst = S_push_slab(aTHX); | |
4937 | PL_regmatch_state = newst; | |
786e8c11 | 4938 | |
40a82448 DM |
4939 | locinput = PL_reginput; |
4940 | nextchr = UCHARAT(locinput); | |
4941 | st = newst; | |
4942 | continue; | |
4943 | /* NOTREACHED */ | |
4944 | } | |
a0d0e21e | 4945 | } |
a687059c | 4946 | |
a0d0e21e LW |
4947 | /* |
4948 | * We get here only if there's trouble -- normally "case END" is | |
4949 | * the terminating point. | |
4950 | */ | |
cea2e8a9 | 4951 | Perl_croak(aTHX_ "corrupted regexp pointers"); |
a0d0e21e | 4952 | /*NOTREACHED*/ |
4633a7c4 LW |
4953 | sayNO; |
4954 | ||
262b90c4 | 4955 | yes: |
77cb431f DM |
4956 | if (yes_state) { |
4957 | /* we have successfully completed a subexpression, but we must now | |
4958 | * pop to the state marked by yes_state and continue from there */ | |
77cb431f | 4959 | assert(st != yes_state); |
5bc10b2c DM |
4960 | #ifdef DEBUGGING |
4961 | while (st != yes_state) { | |
4962 | st--; | |
4963 | if (st < SLAB_FIRST(PL_regmatch_slab)) { | |
4964 | PL_regmatch_slab = PL_regmatch_slab->prev; | |
4965 | st = SLAB_LAST(PL_regmatch_slab); | |
4966 | } | |
e2e6a0f1 | 4967 | DEBUG_STATE_r({ |
54612592 YO |
4968 | if (no_final) { |
4969 | DEBUG_STATE_pp("pop (no final)"); | |
4970 | } else { | |
4971 | DEBUG_STATE_pp("pop (yes)"); | |
4972 | } | |
e2e6a0f1 | 4973 | }); |
5bc10b2c DM |
4974 | depth--; |
4975 | } | |
4976 | #else | |
77cb431f DM |
4977 | while (yes_state < SLAB_FIRST(PL_regmatch_slab) |
4978 | || yes_state > SLAB_LAST(PL_regmatch_slab)) | |
4979 | { | |
4980 | /* not in this slab, pop slab */ | |
4981 | depth -= (st - SLAB_FIRST(PL_regmatch_slab) + 1); | |
4982 | PL_regmatch_slab = PL_regmatch_slab->prev; | |
4983 | st = SLAB_LAST(PL_regmatch_slab); | |
4984 | } | |
4985 | depth -= (st - yes_state); | |
5bc10b2c | 4986 | #endif |
77cb431f DM |
4987 | st = yes_state; |
4988 | yes_state = st->u.yes.prev_yes_state; | |
4989 | PL_regmatch_state = st; | |
24b23f37 | 4990 | |
5d458dd8 YO |
4991 | if (no_final) { |
4992 | locinput= st->locinput; | |
4993 | nextchr = UCHARAT(locinput); | |
4994 | } | |
54612592 | 4995 | state_num = st->resume_state + no_final; |
24d3c4a9 | 4996 | goto reenter_switch; |
77cb431f DM |
4997 | } |
4998 | ||
a3621e74 | 4999 | DEBUG_EXECUTE_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n", |
e4584336 | 5000 | PL_colors[4], PL_colors[5])); |
02db2b7b | 5001 | |
95b24440 | 5002 | result = 1; |
aa283a38 | 5003 | goto final_exit; |
4633a7c4 LW |
5004 | |
5005 | no: | |
a3621e74 | 5006 | DEBUG_EXECUTE_r( |
7821416a | 5007 | PerlIO_printf(Perl_debug_log, |
786e8c11 | 5008 | "%*s %sfailed...%s\n", |
5bc10b2c | 5009 | REPORT_CODE_OFF+depth*2, "", |
786e8c11 | 5010 | PL_colors[4], PL_colors[5]) |
7821416a | 5011 | ); |
aa283a38 | 5012 | |
262b90c4 | 5013 | no_silent: |
54612592 YO |
5014 | if (no_final) { |
5015 | if (yes_state) { | |
5016 | goto yes; | |
5017 | } else { | |
5018 | goto final_exit; | |
5019 | } | |
5020 | } | |
aa283a38 DM |
5021 | if (depth) { |
5022 | /* there's a previous state to backtrack to */ | |
40a82448 DM |
5023 | st--; |
5024 | if (st < SLAB_FIRST(PL_regmatch_slab)) { | |
5025 | PL_regmatch_slab = PL_regmatch_slab->prev; | |
5026 | st = SLAB_LAST(PL_regmatch_slab); | |
5027 | } | |
5028 | PL_regmatch_state = st; | |
40a82448 DM |
5029 | locinput= st->locinput; |
5030 | nextchr = UCHARAT(locinput); | |
5031 | ||
5bc10b2c DM |
5032 | DEBUG_STATE_pp("pop"); |
5033 | depth--; | |
262b90c4 DM |
5034 | if (yes_state == st) |
5035 | yes_state = st->u.yes.prev_yes_state; | |
5bc10b2c | 5036 | |
24d3c4a9 DM |
5037 | state_num = st->resume_state + 1; /* failure = success + 1 */ |
5038 | goto reenter_switch; | |
95b24440 | 5039 | } |
24d3c4a9 | 5040 | result = 0; |
aa283a38 | 5041 | |
262b90c4 | 5042 | final_exit: |
bbe252da | 5043 | if (rex->intflags & PREGf_VERBARG_SEEN) { |
5d458dd8 YO |
5044 | SV *sv_err = get_sv("REGERROR", 1); |
5045 | SV *sv_mrk = get_sv("REGMARK", 1); | |
5046 | if (result) { | |
e2e6a0f1 | 5047 | sv_commit = &PL_sv_no; |
5d458dd8 YO |
5048 | if (!sv_yes_mark) |
5049 | sv_yes_mark = &PL_sv_yes; | |
5050 | } else { | |
5051 | if (!sv_commit) | |
5052 | sv_commit = &PL_sv_yes; | |
5053 | sv_yes_mark = &PL_sv_no; | |
5054 | } | |
5055 | sv_setsv(sv_err, sv_commit); | |
5056 | sv_setsv(sv_mrk, sv_yes_mark); | |
e2e6a0f1 | 5057 | } |
5d9a96ca DM |
5058 | /* restore original high-water mark */ |
5059 | PL_regmatch_slab = orig_slab; | |
5060 | PL_regmatch_state = orig_state; | |
5061 | ||
5062 | /* free all slabs above current one */ | |
5063 | if (orig_slab->next) { | |
c4fd8992 | 5064 | regmatch_slab *sl = orig_slab->next; |
5d9a96ca DM |
5065 | orig_slab->next = NULL; |
5066 | while (sl) { | |
c4fd8992 | 5067 | regmatch_slab * const osl = sl; |
5d9a96ca | 5068 | sl = sl->next; |
ad65c075 | 5069 | Safefree(osl); |
5d9a96ca DM |
5070 | } |
5071 | } | |
5072 | ||
95b24440 | 5073 | return result; |
a687059c LW |
5074 | } |
5075 | ||
5076 | /* | |
5077 | - regrepeat - repeatedly match something simple, report how many | |
5078 | */ | |
5079 | /* | |
5080 | * [This routine now assumes that it will only match on things of length 1. | |
5081 | * That was true before, but now we assume scan - reginput is the count, | |
a0ed51b3 | 5082 | * rather than incrementing count on every character. [Er, except utf8.]] |
a687059c | 5083 | */ |
76e3520e | 5084 | STATIC I32 |
e2e6a0f1 | 5085 | S_regrepeat(pTHX_ const regexp *prog, const regnode *p, I32 max, int depth) |
a687059c | 5086 | { |
27da23d5 | 5087 | dVAR; |
a0d0e21e | 5088 | register char *scan; |
a0d0e21e | 5089 | register I32 c; |
3280af22 | 5090 | register char *loceol = PL_regeol; |
a0ed51b3 | 5091 | register I32 hardcount = 0; |
53c4c00c | 5092 | register bool do_utf8 = PL_reg_match_utf8; |
a0d0e21e | 5093 | |
3280af22 | 5094 | scan = PL_reginput; |
faf11cac HS |
5095 | if (max == REG_INFTY) |
5096 | max = I32_MAX; | |
5097 | else if (max < loceol - scan) | |
7f596f4c | 5098 | loceol = scan + max; |
a0d0e21e | 5099 | switch (OP(p)) { |
22c35a8c | 5100 | case REG_ANY: |
1aa99e6b | 5101 | if (do_utf8) { |
ffc61ed2 | 5102 | loceol = PL_regeol; |
1aa99e6b | 5103 | while (scan < loceol && hardcount < max && *scan != '\n') { |
ffc61ed2 JH |
5104 | scan += UTF8SKIP(scan); |
5105 | hardcount++; | |
5106 | } | |
5107 | } else { | |
5108 | while (scan < loceol && *scan != '\n') | |
5109 | scan++; | |
a0ed51b3 LW |
5110 | } |
5111 | break; | |
ffc61ed2 | 5112 | case SANY: |
def8e4ea JH |
5113 | if (do_utf8) { |
5114 | loceol = PL_regeol; | |
a0804c9e | 5115 | while (scan < loceol && hardcount < max) { |
def8e4ea JH |
5116 | scan += UTF8SKIP(scan); |
5117 | hardcount++; | |
5118 | } | |
5119 | } | |
5120 | else | |
5121 | scan = loceol; | |
a0ed51b3 | 5122 | break; |
f33976b4 DB |
5123 | case CANY: |
5124 | scan = loceol; | |
5125 | break; | |
090f7165 JH |
5126 | case EXACT: /* length of string is 1 */ |
5127 | c = (U8)*STRING(p); | |
5128 | while (scan < loceol && UCHARAT(scan) == c) | |
5129 | scan++; | |
bbce6d69 | 5130 | break; |
5131 | case EXACTF: /* length of string is 1 */ | |
cd439c50 | 5132 | c = (U8)*STRING(p); |
bbce6d69 | 5133 | while (scan < loceol && |
22c35a8c | 5134 | (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c])) |
bbce6d69 | 5135 | scan++; |
5136 | break; | |
5137 | case EXACTFL: /* length of string is 1 */ | |
3280af22 | 5138 | PL_reg_flags |= RF_tainted; |
cd439c50 | 5139 | c = (U8)*STRING(p); |
bbce6d69 | 5140 | while (scan < loceol && |
22c35a8c | 5141 | (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c])) |
a0d0e21e LW |
5142 | scan++; |
5143 | break; | |
5144 | case ANYOF: | |
ffc61ed2 JH |
5145 | if (do_utf8) { |
5146 | loceol = PL_regeol; | |
cfc92286 | 5147 | while (hardcount < max && scan < loceol && |
32fc9b6a | 5148 | reginclass(prog, p, (U8*)scan, 0, do_utf8)) { |
ffc61ed2 JH |
5149 | scan += UTF8SKIP(scan); |
5150 | hardcount++; | |
5151 | } | |
5152 | } else { | |
32fc9b6a | 5153 | while (scan < loceol && REGINCLASS(prog, p, (U8*)scan)) |
ffc61ed2 JH |
5154 | scan++; |
5155 | } | |
a0d0e21e LW |
5156 | break; |
5157 | case ALNUM: | |
1aa99e6b | 5158 | if (do_utf8) { |
ffc61ed2 | 5159 | loceol = PL_regeol; |
1a4fad37 | 5160 | LOAD_UTF8_CHARCLASS_ALNUM(); |
1aa99e6b | 5161 | while (hardcount < max && scan < loceol && |
3568d838 | 5162 | swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) { |
ffc61ed2 JH |
5163 | scan += UTF8SKIP(scan); |
5164 | hardcount++; | |
5165 | } | |
5166 | } else { | |
5167 | while (scan < loceol && isALNUM(*scan)) | |
5168 | scan++; | |
a0ed51b3 LW |
5169 | } |
5170 | break; | |
bbce6d69 | 5171 | case ALNUML: |
3280af22 | 5172 | PL_reg_flags |= RF_tainted; |
1aa99e6b | 5173 | if (do_utf8) { |
ffc61ed2 | 5174 | loceol = PL_regeol; |
1aa99e6b IH |
5175 | while (hardcount < max && scan < loceol && |
5176 | isALNUM_LC_utf8((U8*)scan)) { | |
ffc61ed2 JH |
5177 | scan += UTF8SKIP(scan); |
5178 | hardcount++; | |
5179 | } | |
5180 | } else { | |
5181 | while (scan < loceol && isALNUM_LC(*scan)) | |
5182 | scan++; | |
a0ed51b3 LW |
5183 | } |
5184 | break; | |
a0d0e21e | 5185 | case NALNUM: |
1aa99e6b | 5186 | if (do_utf8) { |
ffc61ed2 | 5187 | loceol = PL_regeol; |
1a4fad37 | 5188 | LOAD_UTF8_CHARCLASS_ALNUM(); |
1aa99e6b | 5189 | while (hardcount < max && scan < loceol && |
3568d838 | 5190 | !swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) { |
ffc61ed2 JH |
5191 | scan += UTF8SKIP(scan); |
5192 | hardcount++; | |
5193 | } | |
5194 | } else { | |
5195 | while (scan < loceol && !isALNUM(*scan)) | |
5196 | scan++; | |
a0ed51b3 LW |
5197 | } |
5198 | break; | |
bbce6d69 | 5199 | case NALNUML: |
3280af22 | 5200 | PL_reg_flags |= RF_tainted; |
1aa99e6b | 5201 | if (do_utf8) { |
ffc61ed2 | 5202 | loceol = PL_regeol; |
1aa99e6b IH |
5203 | while (hardcount < max && scan < loceol && |
5204 | !isALNUM_LC_utf8((U8*)scan)) { | |
ffc61ed2 JH |
5205 | scan += UTF8SKIP(scan); |
5206 | hardcount++; | |
5207 | } | |
5208 | } else { | |
5209 | while (scan < loceol && !isALNUM_LC(*scan)) | |
5210 | scan++; | |
a0ed51b3 LW |
5211 | } |
5212 | break; | |
a0d0e21e | 5213 | case SPACE: |
1aa99e6b | 5214 | if (do_utf8) { |
ffc61ed2 | 5215 | loceol = PL_regeol; |
1a4fad37 | 5216 | LOAD_UTF8_CHARCLASS_SPACE(); |
1aa99e6b | 5217 | while (hardcount < max && scan < loceol && |
3568d838 JH |
5218 | (*scan == ' ' || |
5219 | swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) { | |
ffc61ed2 JH |
5220 | scan += UTF8SKIP(scan); |
5221 | hardcount++; | |
5222 | } | |
5223 | } else { | |
5224 | while (scan < loceol && isSPACE(*scan)) | |
5225 | scan++; | |
a0ed51b3 LW |
5226 | } |
5227 | break; | |
bbce6d69 | 5228 | case SPACEL: |
3280af22 | 5229 | PL_reg_flags |= RF_tainted; |
1aa99e6b | 5230 | if (do_utf8) { |
ffc61ed2 | 5231 | loceol = PL_regeol; |
1aa99e6b | 5232 | while (hardcount < max && scan < loceol && |
ffc61ed2 JH |
5233 | (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
5234 | scan += UTF8SKIP(scan); | |
5235 | hardcount++; | |
5236 | } | |
5237 | } else { | |
5238 | while (scan < loceol && isSPACE_LC(*scan)) | |
5239 | scan++; | |
a0ed51b3 LW |
5240 | } |
5241 | break; | |
a0d0e21e | 5242 | case NSPACE: |
1aa99e6b | 5243 | if (do_utf8) { |
ffc61ed2 | 5244 | loceol = PL_regeol; |
1a4fad37 | 5245 | LOAD_UTF8_CHARCLASS_SPACE(); |
1aa99e6b | 5246 | while (hardcount < max && scan < loceol && |
3568d838 JH |
5247 | !(*scan == ' ' || |
5248 | swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) { | |
ffc61ed2 JH |
5249 | scan += UTF8SKIP(scan); |
5250 | hardcount++; | |
5251 | } | |
5252 | } else { | |
5253 | while (scan < loceol && !isSPACE(*scan)) | |
5254 | scan++; | |
5255 | break; | |
a0ed51b3 | 5256 | } |
bbce6d69 | 5257 | case NSPACEL: |
3280af22 | 5258 | PL_reg_flags |= RF_tainted; |
1aa99e6b | 5259 | if (do_utf8) { |
ffc61ed2 | 5260 | loceol = PL_regeol; |
1aa99e6b | 5261 | while (hardcount < max && scan < loceol && |
ffc61ed2 JH |
5262 | !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
5263 | scan += UTF8SKIP(scan); | |
5264 | hardcount++; | |
5265 | } | |
5266 | } else { | |
5267 | while (scan < loceol && !isSPACE_LC(*scan)) | |
5268 | scan++; | |
a0ed51b3 LW |
5269 | } |
5270 | break; | |
a0d0e21e | 5271 | case DIGIT: |
1aa99e6b | 5272 | if (do_utf8) { |
ffc61ed2 | 5273 | loceol = PL_regeol; |
1a4fad37 | 5274 | LOAD_UTF8_CHARCLASS_DIGIT(); |
1aa99e6b | 5275 | while (hardcount < max && scan < loceol && |
3568d838 | 5276 | swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) { |
ffc61ed2 JH |
5277 | scan += UTF8SKIP(scan); |
5278 | hardcount++; | |
5279 | } | |
5280 | } else { | |
5281 | while (scan < loceol && isDIGIT(*scan)) | |
5282 | scan++; | |
a0ed51b3 LW |
5283 | } |
5284 | break; | |
a0d0e21e | 5285 | case NDIGIT: |
1aa99e6b | 5286 | if (do_utf8) { |
ffc61ed2 | 5287 | loceol = PL_regeol; |
1a4fad37 | 5288 | LOAD_UTF8_CHARCLASS_DIGIT(); |
1aa99e6b | 5289 | while (hardcount < max && scan < loceol && |
3568d838 | 5290 | !swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) { |
ffc61ed2 JH |
5291 | scan += UTF8SKIP(scan); |
5292 | hardcount++; | |
5293 | } | |
5294 | } else { | |
5295 | while (scan < loceol && !isDIGIT(*scan)) | |
5296 | scan++; | |
a0ed51b3 LW |
5297 | } |
5298 | break; | |
a0d0e21e LW |
5299 | default: /* Called on something of 0 width. */ |
5300 | break; /* So match right here or not at all. */ | |
5301 | } | |
a687059c | 5302 | |
a0ed51b3 LW |
5303 | if (hardcount) |
5304 | c = hardcount; | |
5305 | else | |
5306 | c = scan - PL_reginput; | |
3280af22 | 5307 | PL_reginput = scan; |
a687059c | 5308 | |
a3621e74 | 5309 | DEBUG_r({ |
e68ec53f | 5310 | GET_RE_DEBUG_FLAGS_DECL; |
be8e71aa | 5311 | DEBUG_EXECUTE_r({ |
e68ec53f YO |
5312 | SV * const prop = sv_newmortal(); |
5313 | regprop(prog, prop, p); | |
5314 | PerlIO_printf(Perl_debug_log, | |
be8e71aa | 5315 | "%*s %s can match %"IVdf" times out of %"IVdf"...\n", |
e2e6a0f1 | 5316 | REPORT_CODE_OFF + depth*2, "", SvPVX_const(prop),(IV)c,(IV)max); |
a3621e74 | 5317 | }); |
be8e71aa | 5318 | }); |
9041c2e3 | 5319 | |
a0d0e21e | 5320 | return(c); |
a687059c LW |
5321 | } |
5322 | ||
c277df42 | 5323 | |
be8e71aa | 5324 | #if !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION) |
c277df42 | 5325 | /* |
ffc61ed2 JH |
5326 | - regclass_swash - prepare the utf8 swash |
5327 | */ | |
5328 | ||
5329 | SV * | |
32fc9b6a | 5330 | Perl_regclass_swash(pTHX_ const regexp *prog, register const regnode* node, bool doinit, SV** listsvp, SV **altsvp) |
ffc61ed2 | 5331 | { |
97aff369 | 5332 | dVAR; |
9e55ce06 JH |
5333 | SV *sw = NULL; |
5334 | SV *si = NULL; | |
5335 | SV *alt = NULL; | |
f8fc2ecf YO |
5336 | RXi_GET_DECL(prog,progi); |
5337 | const struct reg_data * const data = prog ? progi->data : NULL; | |
ffc61ed2 | 5338 | |
4f639d21 | 5339 | if (data && data->count) { |
a3b680e6 | 5340 | const U32 n = ARG(node); |
ffc61ed2 | 5341 | |
4f639d21 DM |
5342 | if (data->what[n] == 's') { |
5343 | SV * const rv = (SV*)data->data[n]; | |
890ce7af | 5344 | AV * const av = (AV*)SvRV((SV*)rv); |
2d03de9c | 5345 | SV **const ary = AvARRAY(av); |
9e55ce06 | 5346 | SV **a, **b; |
9041c2e3 | 5347 | |
711a919c | 5348 | /* See the end of regcomp.c:S_regclass() for |
9e55ce06 JH |
5349 | * documentation of these array elements. */ |
5350 | ||
b11f357e | 5351 | si = *ary; |
8f7f7219 | 5352 | a = SvROK(ary[1]) ? &ary[1] : 0; |
b11f357e JH |
5353 | b = SvTYPE(ary[2]) == SVt_PVAV ? &ary[2] : 0; |
5354 | ||
ffc61ed2 JH |
5355 | if (a) |
5356 | sw = *a; | |
5357 | else if (si && doinit) { | |
5358 | sw = swash_init("utf8", "", si, 1, 0); | |
5359 | (void)av_store(av, 1, sw); | |
5360 | } | |
9e55ce06 JH |
5361 | if (b) |
5362 | alt = *b; | |
ffc61ed2 JH |
5363 | } |
5364 | } | |
5365 | ||
9e55ce06 JH |
5366 | if (listsvp) |
5367 | *listsvp = si; | |
5368 | if (altsvp) | |
5369 | *altsvp = alt; | |
ffc61ed2 JH |
5370 | |
5371 | return sw; | |
5372 | } | |
76234dfb | 5373 | #endif |
ffc61ed2 JH |
5374 | |
5375 | /* | |
ba7b4546 | 5376 | - reginclass - determine if a character falls into a character class |
832705d4 JH |
5377 | |
5378 | The n is the ANYOF regnode, the p is the target string, lenp | |
5379 | is pointer to the maximum length of how far to go in the p | |
5380 | (if the lenp is zero, UTF8SKIP(p) is used), | |
5381 | do_utf8 tells whether the target string is in UTF-8. | |
5382 | ||
bbce6d69 | 5383 | */ |
5384 | ||
76e3520e | 5385 | STATIC bool |
32fc9b6a | 5386 | S_reginclass(pTHX_ const regexp *prog, register const regnode *n, register const U8* p, STRLEN* lenp, register bool do_utf8) |
bbce6d69 | 5387 | { |
27da23d5 | 5388 | dVAR; |
a3b680e6 | 5389 | const char flags = ANYOF_FLAGS(n); |
bbce6d69 | 5390 | bool match = FALSE; |
cc07378b | 5391 | UV c = *p; |
ae9ddab8 | 5392 | STRLEN len = 0; |
9e55ce06 | 5393 | STRLEN plen; |
1aa99e6b | 5394 | |
19f67299 TS |
5395 | if (do_utf8 && !UTF8_IS_INVARIANT(c)) { |
5396 | c = utf8n_to_uvchr(p, UTF8_MAXBYTES, &len, | |
4ad0818d DM |
5397 | (UTF8_ALLOW_DEFAULT & UTF8_ALLOW_ANYUV) | UTF8_CHECK_ONLY); |
5398 | /* see [perl #37836] for UTF8_ALLOW_ANYUV */ | |
e8a70c6f SP |
5399 | if (len == (STRLEN)-1) |
5400 | Perl_croak(aTHX_ "Malformed UTF-8 character (fatal)"); | |
19f67299 | 5401 | } |
bbce6d69 | 5402 | |
0f0076b4 | 5403 | plen = lenp ? *lenp : UNISKIP(NATIVE_TO_UNI(c)); |
ffc61ed2 | 5404 | if (do_utf8 || (flags & ANYOF_UNICODE)) { |
9e55ce06 JH |
5405 | if (lenp) |
5406 | *lenp = 0; | |
ffc61ed2 | 5407 | if (do_utf8 && !ANYOF_RUNTIME(n)) { |
ffc61ed2 JH |
5408 | if (len != (STRLEN)-1 && c < 256 && ANYOF_BITMAP_TEST(n, c)) |
5409 | match = TRUE; | |
bbce6d69 | 5410 | } |
3568d838 | 5411 | if (!match && do_utf8 && (flags & ANYOF_UNICODE_ALL) && c >= 256) |
1aa99e6b | 5412 | match = TRUE; |
ffc61ed2 | 5413 | if (!match) { |
9e55ce06 | 5414 | AV *av; |
32fc9b6a | 5415 | SV * const sw = regclass_swash(prog, n, TRUE, 0, (SV**)&av); |
ffc61ed2 JH |
5416 | |
5417 | if (sw) { | |
3568d838 | 5418 | if (swash_fetch(sw, p, do_utf8)) |
ffc61ed2 JH |
5419 | match = TRUE; |
5420 | else if (flags & ANYOF_FOLD) { | |
9e55ce06 JH |
5421 | if (!match && lenp && av) { |
5422 | I32 i; | |
9e55ce06 | 5423 | for (i = 0; i <= av_len(av); i++) { |
890ce7af | 5424 | SV* const sv = *av_fetch(av, i, FALSE); |
9e55ce06 | 5425 | STRLEN len; |
890ce7af | 5426 | const char * const s = SvPV_const(sv, len); |
9e55ce06 | 5427 | |
061b10df | 5428 | if (len <= plen && memEQ(s, (char*)p, len)) { |
9e55ce06 JH |
5429 | *lenp = len; |
5430 | match = TRUE; | |
5431 | break; | |
5432 | } | |
5433 | } | |
5434 | } | |
5435 | if (!match) { | |
89ebb4a3 | 5436 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1]; |
4a623e43 JH |
5437 | STRLEN tmplen; |
5438 | ||
9e55ce06 JH |
5439 | to_utf8_fold(p, tmpbuf, &tmplen); |
5440 | if (swash_fetch(sw, tmpbuf, do_utf8)) | |
5441 | match = TRUE; | |
5442 | } | |
ffc61ed2 JH |
5443 | } |
5444 | } | |
bbce6d69 | 5445 | } |
9e55ce06 | 5446 | if (match && lenp && *lenp == 0) |
0f0076b4 | 5447 | *lenp = UNISKIP(NATIVE_TO_UNI(c)); |
bbce6d69 | 5448 | } |
1aa99e6b | 5449 | if (!match && c < 256) { |
ffc61ed2 JH |
5450 | if (ANYOF_BITMAP_TEST(n, c)) |
5451 | match = TRUE; | |
5452 | else if (flags & ANYOF_FOLD) { | |
eb160463 | 5453 | U8 f; |
a0ed51b3 | 5454 | |
ffc61ed2 JH |
5455 | if (flags & ANYOF_LOCALE) { |
5456 | PL_reg_flags |= RF_tainted; | |
5457 | f = PL_fold_locale[c]; | |
5458 | } | |
5459 | else | |
5460 | f = PL_fold[c]; | |
5461 | if (f != c && ANYOF_BITMAP_TEST(n, f)) | |
5462 | match = TRUE; | |
5463 | } | |
5464 | ||
5465 | if (!match && (flags & ANYOF_CLASS)) { | |
a0ed51b3 | 5466 | PL_reg_flags |= RF_tainted; |
ffc61ed2 JH |
5467 | if ( |
5468 | (ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) || | |
5469 | (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) || | |
5470 | (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) || | |
5471 | (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) || | |
5472 | (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) || | |
5473 | (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) || | |
5474 | (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) || | |
5475 | (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) || | |
5476 | (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) || | |
5477 | (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) || | |
5478 | (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII(c)) || | |
5479 | (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII(c)) || | |
5480 | (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) || | |
5481 | (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) || | |
5482 | (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) || | |
5483 | (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) || | |
5484 | (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) || | |
5485 | (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) || | |
5486 | (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) || | |
5487 | (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) || | |
5488 | (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) || | |
5489 | (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) || | |
5490 | (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) || | |
5491 | (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) || | |
5492 | (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) || | |
5493 | (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) || | |
5494 | (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) || | |
5495 | (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) || | |
5496 | (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK(c)) || | |
5497 | (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK(c)) | |
5498 | ) /* How's that for a conditional? */ | |
5499 | { | |
5500 | match = TRUE; | |
5501 | } | |
a0ed51b3 | 5502 | } |
a0ed51b3 LW |
5503 | } |
5504 | ||
a0ed51b3 LW |
5505 | return (flags & ANYOF_INVERT) ? !match : match; |
5506 | } | |
161b471a | 5507 | |
dfe13c55 | 5508 | STATIC U8 * |
0ce71af7 | 5509 | S_reghop3(U8 *s, I32 off, const U8* lim) |
9041c2e3 | 5510 | { |
97aff369 | 5511 | dVAR; |
a0ed51b3 | 5512 | if (off >= 0) { |
1aa99e6b | 5513 | while (off-- && s < lim) { |
ffc61ed2 | 5514 | /* XXX could check well-formedness here */ |
a0ed51b3 | 5515 | s += UTF8SKIP(s); |
ffc61ed2 | 5516 | } |
a0ed51b3 LW |
5517 | } |
5518 | else { | |
1de06328 YO |
5519 | while (off++ && s > lim) { |
5520 | s--; | |
5521 | if (UTF8_IS_CONTINUED(*s)) { | |
5522 | while (s > lim && UTF8_IS_CONTINUATION(*s)) | |
5523 | s--; | |
a0ed51b3 | 5524 | } |
1de06328 | 5525 | /* XXX could check well-formedness here */ |
a0ed51b3 LW |
5526 | } |
5527 | } | |
5528 | return s; | |
5529 | } | |
161b471a | 5530 | |
f9f4320a YO |
5531 | #ifdef XXX_dmq |
5532 | /* there are a bunch of places where we use two reghop3's that should | |
5533 | be replaced with this routine. but since thats not done yet | |
5534 | we ifdef it out - dmq | |
5535 | */ | |
dfe13c55 | 5536 | STATIC U8 * |
1de06328 YO |
5537 | S_reghop4(U8 *s, I32 off, const U8* llim, const U8* rlim) |
5538 | { | |
5539 | dVAR; | |
5540 | if (off >= 0) { | |
5541 | while (off-- && s < rlim) { | |
5542 | /* XXX could check well-formedness here */ | |
5543 | s += UTF8SKIP(s); | |
5544 | } | |
5545 | } | |
5546 | else { | |
5547 | while (off++ && s > llim) { | |
5548 | s--; | |
5549 | if (UTF8_IS_CONTINUED(*s)) { | |
5550 | while (s > llim && UTF8_IS_CONTINUATION(*s)) | |
5551 | s--; | |
5552 | } | |
5553 | /* XXX could check well-formedness here */ | |
5554 | } | |
5555 | } | |
5556 | return s; | |
5557 | } | |
f9f4320a | 5558 | #endif |
1de06328 YO |
5559 | |
5560 | STATIC U8 * | |
0ce71af7 | 5561 | S_reghopmaybe3(U8* s, I32 off, const U8* lim) |
a0ed51b3 | 5562 | { |
97aff369 | 5563 | dVAR; |
a0ed51b3 | 5564 | if (off >= 0) { |
1aa99e6b | 5565 | while (off-- && s < lim) { |
ffc61ed2 | 5566 | /* XXX could check well-formedness here */ |
a0ed51b3 | 5567 | s += UTF8SKIP(s); |
ffc61ed2 | 5568 | } |
a0ed51b3 | 5569 | if (off >= 0) |
3dab1dad | 5570 | return NULL; |
a0ed51b3 LW |
5571 | } |
5572 | else { | |
1de06328 YO |
5573 | while (off++ && s > lim) { |
5574 | s--; | |
5575 | if (UTF8_IS_CONTINUED(*s)) { | |
5576 | while (s > lim && UTF8_IS_CONTINUATION(*s)) | |
5577 | s--; | |
a0ed51b3 | 5578 | } |
1de06328 | 5579 | /* XXX could check well-formedness here */ |
a0ed51b3 LW |
5580 | } |
5581 | if (off <= 0) | |
3dab1dad | 5582 | return NULL; |
a0ed51b3 LW |
5583 | } |
5584 | return s; | |
5585 | } | |
51371543 | 5586 | |
51371543 | 5587 | static void |
acfe0abc | 5588 | restore_pos(pTHX_ void *arg) |
51371543 | 5589 | { |
97aff369 | 5590 | dVAR; |
097eb12c | 5591 | regexp * const rex = (regexp *)arg; |
51371543 GS |
5592 | if (PL_reg_eval_set) { |
5593 | if (PL_reg_oldsaved) { | |
4f639d21 DM |
5594 | rex->subbeg = PL_reg_oldsaved; |
5595 | rex->sublen = PL_reg_oldsavedlen; | |
f8c7b90f | 5596 | #ifdef PERL_OLD_COPY_ON_WRITE |
4f639d21 | 5597 | rex->saved_copy = PL_nrs; |
ed252734 | 5598 | #endif |
4f639d21 | 5599 | RX_MATCH_COPIED_on(rex); |
51371543 GS |
5600 | } |
5601 | PL_reg_magic->mg_len = PL_reg_oldpos; | |
5602 | PL_reg_eval_set = 0; | |
5603 | PL_curpm = PL_reg_oldcurpm; | |
5604 | } | |
5605 | } | |
33b8afdf JH |
5606 | |
5607 | STATIC void | |
5608 | S_to_utf8_substr(pTHX_ register regexp *prog) | |
5609 | { | |
33b8afdf | 5610 | if (prog->float_substr && !prog->float_utf8) { |
097eb12c AL |
5611 | SV* const sv = newSVsv(prog->float_substr); |
5612 | prog->float_utf8 = sv; | |
33b8afdf JH |
5613 | sv_utf8_upgrade(sv); |
5614 | if (SvTAIL(prog->float_substr)) | |
5615 | SvTAIL_on(sv); | |
5616 | if (prog->float_substr == prog->check_substr) | |
5617 | prog->check_utf8 = sv; | |
5618 | } | |
5619 | if (prog->anchored_substr && !prog->anchored_utf8) { | |
097eb12c AL |
5620 | SV* const sv = newSVsv(prog->anchored_substr); |
5621 | prog->anchored_utf8 = sv; | |
33b8afdf JH |
5622 | sv_utf8_upgrade(sv); |
5623 | if (SvTAIL(prog->anchored_substr)) | |
5624 | SvTAIL_on(sv); | |
5625 | if (prog->anchored_substr == prog->check_substr) | |
5626 | prog->check_utf8 = sv; | |
5627 | } | |
5628 | } | |
5629 | ||
5630 | STATIC void | |
5631 | S_to_byte_substr(pTHX_ register regexp *prog) | |
5632 | { | |
97aff369 | 5633 | dVAR; |
33b8afdf | 5634 | if (prog->float_utf8 && !prog->float_substr) { |
097eb12c AL |
5635 | SV* sv = newSVsv(prog->float_utf8); |
5636 | prog->float_substr = sv; | |
33b8afdf JH |
5637 | if (sv_utf8_downgrade(sv, TRUE)) { |
5638 | if (SvTAIL(prog->float_utf8)) | |
5639 | SvTAIL_on(sv); | |
5640 | } else { | |
5641 | SvREFCNT_dec(sv); | |
5642 | prog->float_substr = sv = &PL_sv_undef; | |
5643 | } | |
5644 | if (prog->float_utf8 == prog->check_utf8) | |
5645 | prog->check_substr = sv; | |
5646 | } | |
5647 | if (prog->anchored_utf8 && !prog->anchored_substr) { | |
097eb12c AL |
5648 | SV* sv = newSVsv(prog->anchored_utf8); |
5649 | prog->anchored_substr = sv; | |
33b8afdf JH |
5650 | if (sv_utf8_downgrade(sv, TRUE)) { |
5651 | if (SvTAIL(prog->anchored_utf8)) | |
5652 | SvTAIL_on(sv); | |
5653 | } else { | |
5654 | SvREFCNT_dec(sv); | |
5655 | prog->anchored_substr = sv = &PL_sv_undef; | |
5656 | } | |
5657 | if (prog->anchored_utf8 == prog->check_utf8) | |
5658 | prog->check_substr = sv; | |
5659 | } | |
5660 | } | |
66610fdd RGS |
5661 | |
5662 | /* | |
5663 | * Local variables: | |
5664 | * c-indentation-style: bsd | |
5665 | * c-basic-offset: 4 | |
5666 | * indent-tabs-mode: t | |
5667 | * End: | |
5668 | * | |
37442d52 RGS |
5669 | * ex: set ts=8 sts=4 sw=4 noet: |
5670 | */ |