| 1 | /* regexec.c |
| 2 | */ |
| 3 | |
| 4 | /* |
| 5 | * "One Ring to rule them all, One Ring to find them..." |
| 6 | */ |
| 7 | |
| 8 | /* NOTE: this is derived from Henry Spencer's regexp code, and should not |
| 9 | * confused with the original package (see point 3 below). Thanks, Henry! |
| 10 | */ |
| 11 | |
| 12 | /* Additional note: this code is very heavily munged from Henry's version |
| 13 | * in places. In some spots I've traded clarity for efficiency, so don't |
| 14 | * blame Henry for some of the lack of readability. |
| 15 | */ |
| 16 | |
| 17 | /* The names of the functions have been changed from regcomp and |
| 18 | * regexec to pregcomp and pregexec in order to avoid conflicts |
| 19 | * with the POSIX routines of the same names. |
| 20 | */ |
| 21 | |
| 22 | #ifdef PERL_EXT_RE_BUILD |
| 23 | /* need to replace pregcomp et al, so enable that */ |
| 24 | # ifndef PERL_IN_XSUB_RE |
| 25 | # define PERL_IN_XSUB_RE |
| 26 | # endif |
| 27 | /* need access to debugger hooks */ |
| 28 | # if defined(PERL_EXT_RE_DEBUG) && !defined(DEBUGGING) |
| 29 | # define DEBUGGING |
| 30 | # endif |
| 31 | #endif |
| 32 | |
| 33 | #ifdef PERL_IN_XSUB_RE |
| 34 | /* We *really* need to overwrite these symbols: */ |
| 35 | # define Perl_regexec_flags my_regexec |
| 36 | # define Perl_regdump my_regdump |
| 37 | # define Perl_regprop my_regprop |
| 38 | # define Perl_re_intuit_start my_re_intuit_start |
| 39 | /* *These* symbols are masked to allow static link. */ |
| 40 | # define Perl_pregexec my_pregexec |
| 41 | # define Perl_reginitcolors my_reginitcolors |
| 42 | # define Perl_regclass_swash my_regclass_swash |
| 43 | |
| 44 | # define PERL_NO_GET_CONTEXT |
| 45 | #endif |
| 46 | |
| 47 | /*SUPPRESS 112*/ |
| 48 | /* |
| 49 | * pregcomp and pregexec -- regsub and regerror are not used in perl |
| 50 | * |
| 51 | * Copyright (c) 1986 by University of Toronto. |
| 52 | * Written by Henry Spencer. Not derived from licensed software. |
| 53 | * |
| 54 | * Permission is granted to anyone to use this software for any |
| 55 | * purpose on any computer system, and to redistribute it freely, |
| 56 | * subject to the following restrictions: |
| 57 | * |
| 58 | * 1. The author is not responsible for the consequences of use of |
| 59 | * this software, no matter how awful, even if they arise |
| 60 | * from defects in it. |
| 61 | * |
| 62 | * 2. The origin of this software must not be misrepresented, either |
| 63 | * by explicit claim or by omission. |
| 64 | * |
| 65 | * 3. Altered versions must be plainly marked as such, and must not |
| 66 | * be misrepresented as being the original software. |
| 67 | * |
| 68 | **** Alterations to Henry's code are... |
| 69 | **** |
| 70 | **** Copyright (c) 1991-2001, Larry Wall |
| 71 | **** |
| 72 | **** You may distribute under the terms of either the GNU General Public |
| 73 | **** License or the Artistic License, as specified in the README file. |
| 74 | * |
| 75 | * Beware that some of this code is subtly aware of the way operator |
| 76 | * precedence is structured in regular expressions. Serious changes in |
| 77 | * regular-expression syntax might require a total rethink. |
| 78 | */ |
| 79 | #include "EXTERN.h" |
| 80 | #define PERL_IN_REGEXEC_C |
| 81 | #include "perl.h" |
| 82 | |
| 83 | #ifdef PERL_IN_XSUB_RE |
| 84 | # if defined(PERL_CAPI) || defined(PERL_OBJECT) |
| 85 | # include "XSUB.h" |
| 86 | # endif |
| 87 | #endif |
| 88 | |
| 89 | #include "regcomp.h" |
| 90 | |
| 91 | #define RF_tainted 1 /* tainted information used? */ |
| 92 | #define RF_warned 2 /* warned about big count? */ |
| 93 | #define RF_evaled 4 /* Did an EVAL with setting? */ |
| 94 | #define RF_utf8 8 /* String contains multibyte chars? */ |
| 95 | |
| 96 | #define UTF (PL_reg_flags & RF_utf8) |
| 97 | |
| 98 | #define RS_init 1 /* eval environment created */ |
| 99 | #define RS_set 2 /* replsv value is set */ |
| 100 | |
| 101 | #ifndef STATIC |
| 102 | #define STATIC static |
| 103 | #endif |
| 104 | |
| 105 | /* |
| 106 | * Forwards. |
| 107 | */ |
| 108 | |
| 109 | #define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv)) |
| 110 | #define CHR_DIST(a,b) (DO_UTF8(PL_reg_sv) ? utf8_distance(a,b) : a - b) |
| 111 | |
| 112 | #define reghop_c(pos,off) ((char*)reghop((U8*)pos, off)) |
| 113 | #define reghopmaybe_c(pos,off) ((char*)reghopmaybe((U8*)pos, off)) |
| 114 | #define HOP(pos,off) (DO_UTF8(PL_reg_sv) ? reghop((U8*)pos, off) : (U8*)(pos + off)) |
| 115 | #define HOPMAYBE(pos,off) (DO_UTF8(PL_reg_sv) ? reghopmaybe((U8*)pos, off) : (U8*)(pos + off)) |
| 116 | #define HOPc(pos,off) ((char*)HOP(pos,off)) |
| 117 | #define HOPMAYBEc(pos,off) ((char*)HOPMAYBE(pos,off)) |
| 118 | |
| 119 | #define HOPBACK(pos, off) ( \ |
| 120 | (UTF && DO_UTF8(PL_reg_sv)) \ |
| 121 | ? reghopmaybe((U8*)pos, -off) \ |
| 122 | : (pos - off >= PL_bostr) \ |
| 123 | ? (U8*)(pos - off) \ |
| 124 | : (U8*)NULL \ |
| 125 | ) |
| 126 | #define HOPBACKc(pos, off) (char*)HOPBACK(pos, off) |
| 127 | |
| 128 | #define reghop3_c(pos,off,lim) ((char*)reghop3((U8*)pos, off, (U8*)lim)) |
| 129 | #define reghopmaybe3_c(pos,off,lim) ((char*)reghopmaybe3((U8*)pos, off, (U8*)lim)) |
| 130 | #define HOP3(pos,off,lim) (DO_UTF8(PL_reg_sv) ? reghop3((U8*)pos, off, (U8*)lim) : (U8*)(pos + off)) |
| 131 | #define HOPMAYBE3(pos,off,lim) (DO_UTF8(PL_reg_sv) ? reghopmaybe3((U8*)pos, off, (U8*)lim) : (U8*)(pos + off)) |
| 132 | #define HOP3c(pos,off,lim) ((char*)HOP3(pos,off,lim)) |
| 133 | #define HOPMAYBE3c(pos,off,lim) ((char*)HOPMAYBE3(pos,off,lim)) |
| 134 | |
| 135 | #define LOAD_UTF8_CHARCLASS(a,b) STMT_START { if (!CAT2(PL_utf8_,a)) (void)CAT2(is_utf8_, a)((U8*)b); } STMT_END |
| 136 | |
| 137 | static void restore_pos(pTHXo_ void *arg); |
| 138 | |
| 139 | STATIC CHECKPOINT |
| 140 | S_regcppush(pTHX_ I32 parenfloor) |
| 141 | { |
| 142 | int retval = PL_savestack_ix; |
| 143 | #define REGCP_PAREN_ELEMS 4 |
| 144 | int paren_elems_to_push = (PL_regsize - parenfloor) * REGCP_PAREN_ELEMS; |
| 145 | int p; |
| 146 | |
| 147 | if (paren_elems_to_push < 0) |
| 148 | Perl_croak(aTHX_ "panic: paren_elems_to_push < 0"); |
| 149 | |
| 150 | #define REGCP_OTHER_ELEMS 5 |
| 151 | SSCHECK(paren_elems_to_push + REGCP_OTHER_ELEMS); |
| 152 | for (p = PL_regsize; p > parenfloor; p--) { |
| 153 | /* REGCP_PARENS_ELEMS are pushed per pairs of parentheses. */ |
| 154 | SSPUSHINT(PL_regendp[p]); |
| 155 | SSPUSHINT(PL_regstartp[p]); |
| 156 | SSPUSHPTR(PL_reg_start_tmp[p]); |
| 157 | SSPUSHINT(p); |
| 158 | } |
| 159 | /* REGCP_OTHER_ELEMS are pushed in any case, parentheses or no. */ |
| 160 | SSPUSHINT(PL_regsize); |
| 161 | SSPUSHINT(*PL_reglastparen); |
| 162 | SSPUSHPTR(PL_reginput); |
| 163 | #define REGCP_FRAME_ELEMS 2 |
| 164 | /* REGCP_FRAME_ELEMS are part of the REGCP_OTHER_ELEMS and |
| 165 | * are needed for the regexp context stack bookkeeping. */ |
| 166 | SSPUSHINT(paren_elems_to_push + REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS); |
| 167 | SSPUSHINT(SAVEt_REGCONTEXT); /* Magic cookie. */ |
| 168 | |
| 169 | return retval; |
| 170 | } |
| 171 | |
| 172 | /* These are needed since we do not localize EVAL nodes: */ |
| 173 | # define REGCP_SET(cp) DEBUG_r(PerlIO_printf(Perl_debug_log, \ |
| 174 | " Setting an EVAL scope, savestack=%"IVdf"\n", \ |
| 175 | (IV)PL_savestack_ix)); cp = PL_savestack_ix |
| 176 | |
| 177 | # define REGCP_UNWIND(cp) DEBUG_r(cp != PL_savestack_ix ? \ |
| 178 | PerlIO_printf(Perl_debug_log, \ |
| 179 | " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \ |
| 180 | (IV)(cp), (IV)PL_savestack_ix) : 0); regcpblow(cp) |
| 181 | |
| 182 | STATIC char * |
| 183 | S_regcppop(pTHX) |
| 184 | { |
| 185 | I32 i; |
| 186 | U32 paren = 0; |
| 187 | char *input; |
| 188 | I32 tmps; |
| 189 | |
| 190 | /* Pop REGCP_OTHER_ELEMS before the parentheses loop starts. */ |
| 191 | i = SSPOPINT; |
| 192 | assert(i == SAVEt_REGCONTEXT); /* Check that the magic cookie is there. */ |
| 193 | i = SSPOPINT; /* Parentheses elements to pop. */ |
| 194 | input = (char *) SSPOPPTR; |
| 195 | *PL_reglastparen = SSPOPINT; |
| 196 | PL_regsize = SSPOPINT; |
| 197 | |
| 198 | /* Now restore the parentheses context. */ |
| 199 | for (i -= (REGCP_OTHER_ELEMS - REGCP_FRAME_ELEMS); |
| 200 | i > 0; i -= REGCP_PAREN_ELEMS) { |
| 201 | paren = (U32)SSPOPINT; |
| 202 | PL_reg_start_tmp[paren] = (char *) SSPOPPTR; |
| 203 | PL_regstartp[paren] = SSPOPINT; |
| 204 | tmps = SSPOPINT; |
| 205 | if (paren <= *PL_reglastparen) |
| 206 | PL_regendp[paren] = tmps; |
| 207 | DEBUG_r( |
| 208 | PerlIO_printf(Perl_debug_log, |
| 209 | " restoring \\%"UVuf" to %"IVdf"(%"IVdf")..%"IVdf"%s\n", |
| 210 | (UV)paren, (IV)PL_regstartp[paren], |
| 211 | (IV)(PL_reg_start_tmp[paren] - PL_bostr), |
| 212 | (IV)PL_regendp[paren], |
| 213 | (paren > *PL_reglastparen ? "(no)" : "")); |
| 214 | ); |
| 215 | } |
| 216 | DEBUG_r( |
| 217 | if (*PL_reglastparen + 1 <= PL_regnpar) { |
| 218 | PerlIO_printf(Perl_debug_log, |
| 219 | " restoring \\%"IVdf"..\\%"IVdf" to undef\n", |
| 220 | (IV)(*PL_reglastparen + 1), (IV)PL_regnpar); |
| 221 | } |
| 222 | ); |
| 223 | #if 1 |
| 224 | /* It would seem that the similar code in regtry() |
| 225 | * already takes care of this, and in fact it is in |
| 226 | * a better location to since this code can #if 0-ed out |
| 227 | * but the code in regtry() is needed or otherwise tests |
| 228 | * requiring null fields (pat.t#187 and split.t#{13,14} |
| 229 | * (as of patchlevel 7877) will fail. Then again, |
| 230 | * this code seems to be necessary or otherwise |
| 231 | * building DynaLoader will fail: |
| 232 | * "Error: '*' not in typemap in DynaLoader.xs, line 164" |
| 233 | * --jhi */ |
| 234 | for (paren = *PL_reglastparen + 1; paren <= PL_regnpar; paren++) { |
| 235 | if (paren > PL_regsize) |
| 236 | PL_regstartp[paren] = -1; |
| 237 | PL_regendp[paren] = -1; |
| 238 | } |
| 239 | #endif |
| 240 | return input; |
| 241 | } |
| 242 | |
| 243 | STATIC char * |
| 244 | S_regcp_set_to(pTHX_ I32 ss) |
| 245 | { |
| 246 | I32 tmp = PL_savestack_ix; |
| 247 | |
| 248 | PL_savestack_ix = ss; |
| 249 | regcppop(); |
| 250 | PL_savestack_ix = tmp; |
| 251 | return Nullch; |
| 252 | } |
| 253 | |
| 254 | typedef struct re_cc_state |
| 255 | { |
| 256 | I32 ss; |
| 257 | regnode *node; |
| 258 | struct re_cc_state *prev; |
| 259 | CURCUR *cc; |
| 260 | regexp *re; |
| 261 | } re_cc_state; |
| 262 | |
| 263 | #define regcpblow(cp) LEAVE_SCOPE(cp) /* Ignores regcppush()ed data. */ |
| 264 | |
| 265 | #define TRYPAREN(paren, n, input) { \ |
| 266 | if (paren) { \ |
| 267 | if (n) { \ |
| 268 | PL_regstartp[paren] = HOPc(input, -1) - PL_bostr; \ |
| 269 | PL_regendp[paren] = input - PL_bostr; \ |
| 270 | } \ |
| 271 | else \ |
| 272 | PL_regendp[paren] = -1; \ |
| 273 | } \ |
| 274 | if (regmatch(next)) \ |
| 275 | sayYES; \ |
| 276 | if (paren && n) \ |
| 277 | PL_regendp[paren] = -1; \ |
| 278 | } |
| 279 | |
| 280 | |
| 281 | /* |
| 282 | * pregexec and friends |
| 283 | */ |
| 284 | |
| 285 | /* |
| 286 | - pregexec - match a regexp against a string |
| 287 | */ |
| 288 | I32 |
| 289 | Perl_pregexec(pTHX_ register regexp *prog, char *stringarg, register char *strend, |
| 290 | char *strbeg, I32 minend, SV *screamer, U32 nosave) |
| 291 | /* strend: pointer to null at end of string */ |
| 292 | /* strbeg: real beginning of string */ |
| 293 | /* minend: end of match must be >=minend after stringarg. */ |
| 294 | /* nosave: For optimizations. */ |
| 295 | { |
| 296 | return |
| 297 | regexec_flags(prog, stringarg, strend, strbeg, minend, screamer, NULL, |
| 298 | nosave ? 0 : REXEC_COPY_STR); |
| 299 | } |
| 300 | |
| 301 | STATIC void |
| 302 | S_cache_re(pTHX_ regexp *prog) |
| 303 | { |
| 304 | PL_regprecomp = prog->precomp; /* Needed for FAIL. */ |
| 305 | #ifdef DEBUGGING |
| 306 | PL_regprogram = prog->program; |
| 307 | #endif |
| 308 | PL_regnpar = prog->nparens; |
| 309 | PL_regdata = prog->data; |
| 310 | PL_reg_re = prog; |
| 311 | } |
| 312 | |
| 313 | /* |
| 314 | * Need to implement the following flags for reg_anch: |
| 315 | * |
| 316 | * USE_INTUIT_NOML - Useful to call re_intuit_start() first |
| 317 | * USE_INTUIT_ML |
| 318 | * INTUIT_AUTORITATIVE_NOML - Can trust a positive answer |
| 319 | * INTUIT_AUTORITATIVE_ML |
| 320 | * INTUIT_ONCE_NOML - Intuit can match in one location only. |
| 321 | * INTUIT_ONCE_ML |
| 322 | * |
| 323 | * Another flag for this function: SECOND_TIME (so that float substrs |
| 324 | * with giant delta may be not rechecked). |
| 325 | */ |
| 326 | |
| 327 | /* Assumptions: if ANCH_GPOS, then strpos is anchored. XXXX Check GPOS logic */ |
| 328 | |
| 329 | /* If SCREAM, then SvPVX(sv) should be compatible with strpos and strend. |
| 330 | Otherwise, only SvCUR(sv) is used to get strbeg. */ |
| 331 | |
| 332 | /* XXXX We assume that strpos is strbeg unless sv. */ |
| 333 | |
| 334 | /* XXXX Some places assume that there is a fixed substring. |
| 335 | An update may be needed if optimizer marks as "INTUITable" |
| 336 | RExen without fixed substrings. Similarly, it is assumed that |
| 337 | lengths of all the strings are no more than minlen, thus they |
| 338 | cannot come from lookahead. |
| 339 | (Or minlen should take into account lookahead.) */ |
| 340 | |
| 341 | /* A failure to find a constant substring means that there is no need to make |
| 342 | an expensive call to REx engine, thus we celebrate a failure. Similarly, |
| 343 | finding a substring too deep into the string means that less calls to |
| 344 | regtry() should be needed. |
| 345 | |
| 346 | REx compiler's optimizer found 4 possible hints: |
| 347 | a) Anchored substring; |
| 348 | b) Fixed substring; |
| 349 | c) Whether we are anchored (beginning-of-line or \G); |
| 350 | d) First node (of those at offset 0) which may distingush positions; |
| 351 | We use a)b)d) and multiline-part of c), and try to find a position in the |
| 352 | string which does not contradict any of them. |
| 353 | */ |
| 354 | |
| 355 | /* Most of decisions we do here should have been done at compile time. |
| 356 | The nodes of the REx which we used for the search should have been |
| 357 | deleted from the finite automaton. */ |
| 358 | |
| 359 | char * |
| 360 | Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, |
| 361 | char *strend, U32 flags, re_scream_pos_data *data) |
| 362 | { |
| 363 | register I32 start_shift = 0; |
| 364 | /* Should be nonnegative! */ |
| 365 | register I32 end_shift = 0; |
| 366 | register char *s; |
| 367 | register SV *check; |
| 368 | char *strbeg; |
| 369 | char *t; |
| 370 | I32 ml_anch; |
| 371 | register char *other_last = Nullch; /* other substr checked before this */ |
| 372 | char *check_at = Nullch; /* check substr found at this pos */ |
| 373 | #ifdef DEBUGGING |
| 374 | char *i_strpos = strpos; |
| 375 | #endif |
| 376 | |
| 377 | DEBUG_r( if (!PL_colorset) reginitcolors() ); |
| 378 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
| 379 | "%sGuessing start of match, REx%s `%s%.60s%s%s' against `%s%.*s%s%s'...\n", |
| 380 | PL_colors[4],PL_colors[5],PL_colors[0], |
| 381 | prog->precomp, |
| 382 | PL_colors[1], |
| 383 | (strlen(prog->precomp) > 60 ? "..." : ""), |
| 384 | PL_colors[0], |
| 385 | (int)(strend - strpos > 60 ? 60 : strend - strpos), |
| 386 | strpos, PL_colors[1], |
| 387 | (strend - strpos > 60 ? "..." : "")) |
| 388 | ); |
| 389 | |
| 390 | if (prog->reganch & ROPT_UTF8) |
| 391 | PL_reg_flags |= RF_utf8; |
| 392 | |
| 393 | if (prog->minlen > CHR_DIST((U8*)strend, (U8*)strpos)) { |
| 394 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String too short...\n")); |
| 395 | goto fail; |
| 396 | } |
| 397 | strbeg = (sv && SvPOK(sv)) ? strend - SvCUR(sv) : strpos; |
| 398 | PL_regeol = strend; |
| 399 | check = prog->check_substr; |
| 400 | if (prog->reganch & ROPT_ANCH) { /* Match at beg-of-str or after \n */ |
| 401 | ml_anch = !( (prog->reganch & ROPT_ANCH_SINGLE) |
| 402 | || ( (prog->reganch & ROPT_ANCH_BOL) |
| 403 | && !PL_multiline ) ); /* Check after \n? */ |
| 404 | |
| 405 | if (!ml_anch) { |
| 406 | if ( !(prog->reganch & (ROPT_ANCH_GPOS /* Checked by the caller */ |
| 407 | | ROPT_IMPLICIT)) /* not a real BOL */ |
| 408 | /* SvCUR is not set on references: SvRV and SvPVX overlap */ |
| 409 | && sv && !SvROK(sv) |
| 410 | && (strpos != strbeg)) { |
| 411 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Not at start...\n")); |
| 412 | goto fail; |
| 413 | } |
| 414 | if (prog->check_offset_min == prog->check_offset_max && |
| 415 | !(prog->reganch & ROPT_SANY_SEEN)) { |
| 416 | /* Substring at constant offset from beg-of-str... */ |
| 417 | I32 slen; |
| 418 | |
| 419 | s = HOP3c(strpos, prog->check_offset_min, strend); |
| 420 | if (SvTAIL(check)) { |
| 421 | slen = SvCUR(check); /* >= 1 */ |
| 422 | |
| 423 | if ( strend - s > slen || strend - s < slen - 1 |
| 424 | || (strend - s == slen && strend[-1] != '\n')) { |
| 425 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String too long...\n")); |
| 426 | goto fail_finish; |
| 427 | } |
| 428 | /* Now should match s[0..slen-2] */ |
| 429 | slen--; |
| 430 | if (slen && (*SvPVX(check) != *s |
| 431 | || (slen > 1 |
| 432 | && memNE(SvPVX(check), s, slen)))) { |
| 433 | report_neq: |
| 434 | DEBUG_r(PerlIO_printf(Perl_debug_log, "String not equal...\n")); |
| 435 | goto fail_finish; |
| 436 | } |
| 437 | } |
| 438 | else if (*SvPVX(check) != *s |
| 439 | || ((slen = SvCUR(check)) > 1 |
| 440 | && memNE(SvPVX(check), s, slen))) |
| 441 | goto report_neq; |
| 442 | goto success_at_start; |
| 443 | } |
| 444 | } |
| 445 | /* Match is anchored, but substr is not anchored wrt beg-of-str. */ |
| 446 | s = strpos; |
| 447 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
| 448 | end_shift = prog->minlen - start_shift - |
| 449 | CHR_SVLEN(check) + (SvTAIL(check) != 0); |
| 450 | if (!ml_anch) { |
| 451 | I32 end = prog->check_offset_max + CHR_SVLEN(check) |
| 452 | - (SvTAIL(check) != 0); |
| 453 | I32 eshift = CHR_DIST((U8*)strend, (U8*)s) - end; |
| 454 | |
| 455 | if (end_shift < eshift) |
| 456 | end_shift = eshift; |
| 457 | } |
| 458 | } |
| 459 | else { /* Can match at random position */ |
| 460 | ml_anch = 0; |
| 461 | s = strpos; |
| 462 | start_shift = prog->check_offset_min; /* okay to underestimate on CC */ |
| 463 | /* Should be nonnegative! */ |
| 464 | end_shift = prog->minlen - start_shift - |
| 465 | CHR_SVLEN(check) + (SvTAIL(check) != 0); |
| 466 | } |
| 467 | |
| 468 | #ifdef DEBUGGING /* 7/99: reports of failure (with the older version) */ |
| 469 | if (end_shift < 0) |
| 470 | Perl_croak(aTHX_ "panic: end_shift"); |
| 471 | #endif |
| 472 | |
| 473 | restart: |
| 474 | /* Find a possible match in the region s..strend by looking for |
| 475 | the "check" substring in the region corrected by start/end_shift. */ |
| 476 | if (flags & REXEC_SCREAM) { |
| 477 | I32 p = -1; /* Internal iterator of scream. */ |
| 478 | I32 *pp = data ? data->scream_pos : &p; |
| 479 | |
| 480 | if (PL_screamfirst[BmRARE(check)] >= 0 |
| 481 | || ( BmRARE(check) == '\n' |
| 482 | && (BmPREVIOUS(check) == SvCUR(check) - 1) |
| 483 | && SvTAIL(check) )) |
| 484 | s = screaminstr(sv, check, |
| 485 | start_shift + (s - strbeg), end_shift, pp, 0); |
| 486 | else |
| 487 | goto fail_finish; |
| 488 | if (data) |
| 489 | *data->scream_olds = s; |
| 490 | } |
| 491 | else if (prog->reganch & ROPT_SANY_SEEN) |
| 492 | s = fbm_instr((U8*)(s + start_shift), |
| 493 | (U8*)(strend - end_shift), |
| 494 | check, PL_multiline ? FBMrf_MULTILINE : 0); |
| 495 | else |
| 496 | s = fbm_instr(HOP3(s, start_shift, strend), |
| 497 | HOP3(strend, -end_shift, strbeg), |
| 498 | check, PL_multiline ? FBMrf_MULTILINE : 0); |
| 499 | |
| 500 | /* Update the count-of-usability, remove useless subpatterns, |
| 501 | unshift s. */ |
| 502 | |
| 503 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%s %s substr `%s%.*s%s'%s%s", |
| 504 | (s ? "Found" : "Did not find"), |
| 505 | ((check == prog->anchored_substr) ? "anchored" : "floating"), |
| 506 | PL_colors[0], |
| 507 | (int)(SvCUR(check) - (SvTAIL(check)!=0)), |
| 508 | SvPVX(check), |
| 509 | PL_colors[1], (SvTAIL(check) ? "$" : ""), |
| 510 | (s ? " at offset " : "...\n") ) ); |
| 511 | |
| 512 | if (!s) |
| 513 | goto fail_finish; |
| 514 | |
| 515 | check_at = s; |
| 516 | |
| 517 | /* Finish the diagnostic message */ |
| 518 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) ); |
| 519 | |
| 520 | /* Got a candidate. Check MBOL anchoring, and the *other* substr. |
| 521 | Start with the other substr. |
| 522 | XXXX no SCREAM optimization yet - and a very coarse implementation |
| 523 | XXXX /ttx+/ results in anchored=`ttx', floating=`x'. floating will |
| 524 | *always* match. Probably should be marked during compile... |
| 525 | Probably it is right to do no SCREAM here... |
| 526 | */ |
| 527 | |
| 528 | if (prog->float_substr && prog->anchored_substr) { |
| 529 | /* Take into account the "other" substring. */ |
| 530 | /* XXXX May be hopelessly wrong for UTF... */ |
| 531 | if (!other_last) |
| 532 | other_last = strpos; |
| 533 | if (check == prog->float_substr) { |
| 534 | do_other_anchored: |
| 535 | { |
| 536 | char *last = HOP3c(s, -start_shift, strbeg), *last1, *last2; |
| 537 | char *s1 = s; |
| 538 | |
| 539 | t = s - prog->check_offset_max; |
| 540 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ |
| 541 | && (!(prog->reganch & ROPT_UTF8) |
| 542 | || ((t = reghopmaybe3_c(s, -(prog->check_offset_max), strpos)) |
| 543 | && t > strpos))) |
| 544 | /* EMPTY */; |
| 545 | else |
| 546 | t = strpos; |
| 547 | t = HOP3c(t, prog->anchored_offset, strend); |
| 548 | if (t < other_last) /* These positions already checked */ |
| 549 | t = other_last; |
| 550 | last2 = last1 = HOP3c(strend, -prog->minlen, strbeg); |
| 551 | if (last < last1) |
| 552 | last1 = last; |
| 553 | /* XXXX It is not documented what units *_offsets are in. Assume bytes. */ |
| 554 | /* On end-of-str: see comment below. */ |
| 555 | s = fbm_instr((unsigned char*)t, |
| 556 | HOP3(HOP3(last1, prog->anchored_offset, strend) |
| 557 | + SvCUR(prog->anchored_substr), |
| 558 | -(SvTAIL(prog->anchored_substr)!=0), strbeg), |
| 559 | prog->anchored_substr, |
| 560 | PL_multiline ? FBMrf_MULTILINE : 0); |
| 561 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
| 562 | "%s anchored substr `%s%.*s%s'%s", |
| 563 | (s ? "Found" : "Contradicts"), |
| 564 | PL_colors[0], |
| 565 | (int)(SvCUR(prog->anchored_substr) |
| 566 | - (SvTAIL(prog->anchored_substr)!=0)), |
| 567 | SvPVX(prog->anchored_substr), |
| 568 | PL_colors[1], (SvTAIL(prog->anchored_substr) ? "$" : ""))); |
| 569 | if (!s) { |
| 570 | if (last1 >= last2) { |
| 571 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
| 572 | ", giving up...\n")); |
| 573 | goto fail_finish; |
| 574 | } |
| 575 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
| 576 | ", trying floating at offset %ld...\n", |
| 577 | (long)(HOP3c(s1, 1, strend) - i_strpos))); |
| 578 | other_last = HOP3c(last1, prog->anchored_offset+1, strend); |
| 579 | s = HOP3c(last, 1, strend); |
| 580 | goto restart; |
| 581 | } |
| 582 | else { |
| 583 | DEBUG_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", |
| 584 | (long)(s - i_strpos))); |
| 585 | t = HOP3c(s, -prog->anchored_offset, strbeg); |
| 586 | other_last = HOP3c(s, 1, strend); |
| 587 | s = s1; |
| 588 | if (t == strpos) |
| 589 | goto try_at_start; |
| 590 | goto try_at_offset; |
| 591 | } |
| 592 | } |
| 593 | } |
| 594 | else { /* Take into account the floating substring. */ |
| 595 | char *last, *last1; |
| 596 | char *s1 = s; |
| 597 | |
| 598 | t = HOP3c(s, -start_shift, strbeg); |
| 599 | last1 = last = |
| 600 | HOP3c(strend, -prog->minlen + prog->float_min_offset, strbeg); |
| 601 | if (CHR_DIST((U8*)last, (U8*)t) > prog->float_max_offset) |
| 602 | last = HOP3c(t, prog->float_max_offset, strend); |
| 603 | s = HOP3c(t, prog->float_min_offset, strend); |
| 604 | if (s < other_last) |
| 605 | s = other_last; |
| 606 | /* XXXX It is not documented what units *_offsets are in. Assume bytes. */ |
| 607 | /* fbm_instr() takes into account exact value of end-of-str |
| 608 | if the check is SvTAIL(ed). Since false positives are OK, |
| 609 | and end-of-str is not later than strend we are OK. */ |
| 610 | s = fbm_instr((unsigned char*)s, |
| 611 | (unsigned char*)last + SvCUR(prog->float_substr) |
| 612 | - (SvTAIL(prog->float_substr)!=0), |
| 613 | prog->float_substr, PL_multiline ? FBMrf_MULTILINE : 0); |
| 614 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%s floating substr `%s%.*s%s'%s", |
| 615 | (s ? "Found" : "Contradicts"), |
| 616 | PL_colors[0], |
| 617 | (int)(SvCUR(prog->float_substr) |
| 618 | - (SvTAIL(prog->float_substr)!=0)), |
| 619 | SvPVX(prog->float_substr), |
| 620 | PL_colors[1], (SvTAIL(prog->float_substr) ? "$" : ""))); |
| 621 | if (!s) { |
| 622 | if (last1 == last) { |
| 623 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
| 624 | ", giving up...\n")); |
| 625 | goto fail_finish; |
| 626 | } |
| 627 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
| 628 | ", trying anchored starting at offset %ld...\n", |
| 629 | (long)(s1 + 1 - i_strpos))); |
| 630 | other_last = last; |
| 631 | s = HOP3c(t, 1, strend); |
| 632 | goto restart; |
| 633 | } |
| 634 | else { |
| 635 | DEBUG_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", |
| 636 | (long)(s - i_strpos))); |
| 637 | other_last = s; /* Fix this later. --Hugo */ |
| 638 | s = s1; |
| 639 | if (t == strpos) |
| 640 | goto try_at_start; |
| 641 | goto try_at_offset; |
| 642 | } |
| 643 | } |
| 644 | } |
| 645 | |
| 646 | t = s - prog->check_offset_max; |
| 647 | if (s - strpos > prog->check_offset_max /* signed-corrected t > strpos */ |
| 648 | && (!(prog->reganch & ROPT_UTF8) |
| 649 | || ((t = reghopmaybe3_c(s, -prog->check_offset_max, strpos)) |
| 650 | && t > strpos))) { |
| 651 | /* Fixed substring is found far enough so that the match |
| 652 | cannot start at strpos. */ |
| 653 | try_at_offset: |
| 654 | if (ml_anch && t[-1] != '\n') { |
| 655 | /* Eventually fbm_*() should handle this, but often |
| 656 | anchored_offset is not 0, so this check will not be wasted. */ |
| 657 | /* XXXX In the code below we prefer to look for "^" even in |
| 658 | presence of anchored substrings. And we search even |
| 659 | beyond the found float position. These pessimizations |
| 660 | are historical artefacts only. */ |
| 661 | find_anchor: |
| 662 | while (t < strend - prog->minlen) { |
| 663 | if (*t == '\n') { |
| 664 | if (t < check_at - prog->check_offset_min) { |
| 665 | if (prog->anchored_substr) { |
| 666 | /* Since we moved from the found position, |
| 667 | we definitely contradict the found anchored |
| 668 | substr. Due to the above check we do not |
| 669 | contradict "check" substr. |
| 670 | Thus we can arrive here only if check substr |
| 671 | is float. Redo checking for "other"=="fixed". |
| 672 | */ |
| 673 | strpos = t + 1; |
| 674 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld, rescanning for anchored from offset %ld...\n", |
| 675 | PL_colors[0],PL_colors[1], (long)(strpos - i_strpos), (long)(strpos - i_strpos + prog->anchored_offset))); |
| 676 | goto do_other_anchored; |
| 677 | } |
| 678 | /* We don't contradict the found floating substring. */ |
| 679 | /* XXXX Why not check for STCLASS? */ |
| 680 | s = t + 1; |
| 681 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m at offset %ld...\n", |
| 682 | PL_colors[0],PL_colors[1], (long)(s - i_strpos))); |
| 683 | goto set_useful; |
| 684 | } |
| 685 | /* Position contradicts check-string */ |
| 686 | /* XXXX probably better to look for check-string |
| 687 | than for "\n", so one should lower the limit for t? */ |
| 688 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Found /%s^%s/m, restarting lookup for check-string at offset %ld...\n", |
| 689 | PL_colors[0],PL_colors[1], (long)(t + 1 - i_strpos))); |
| 690 | other_last = strpos = s = t + 1; |
| 691 | goto restart; |
| 692 | } |
| 693 | t++; |
| 694 | } |
| 695 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Did not find /%s^%s/m...\n", |
| 696 | PL_colors[0],PL_colors[1])); |
| 697 | goto fail_finish; |
| 698 | } |
| 699 | else { |
| 700 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Starting position does not contradict /%s^%s/m...\n", |
| 701 | PL_colors[0],PL_colors[1])); |
| 702 | } |
| 703 | s = t; |
| 704 | set_useful: |
| 705 | ++BmUSEFUL(prog->check_substr); /* hooray/5 */ |
| 706 | } |
| 707 | else { |
| 708 | /* The found string does not prohibit matching at strpos, |
| 709 | - no optimization of calling REx engine can be performed, |
| 710 | unless it was an MBOL and we are not after MBOL, |
| 711 | or a future STCLASS check will fail this. */ |
| 712 | try_at_start: |
| 713 | /* Even in this situation we may use MBOL flag if strpos is offset |
| 714 | wrt the start of the string. */ |
| 715 | if (ml_anch && sv && !SvROK(sv) /* See prev comment on SvROK */ |
| 716 | && (strpos != strbeg) && strpos[-1] != '\n' |
| 717 | /* May be due to an implicit anchor of m{.*foo} */ |
| 718 | && !(prog->reganch & ROPT_IMPLICIT)) |
| 719 | { |
| 720 | t = strpos; |
| 721 | goto find_anchor; |
| 722 | } |
| 723 | DEBUG_r( if (ml_anch) |
| 724 | PerlIO_printf(Perl_debug_log, "Position at offset %ld does not contradict /%s^%s/m...\n", |
| 725 | (long)(strpos - i_strpos), PL_colors[0],PL_colors[1]); |
| 726 | ); |
| 727 | success_at_start: |
| 728 | if (!(prog->reganch & ROPT_NAUGHTY) /* XXXX If strpos moved? */ |
| 729 | && prog->check_substr /* Could be deleted already */ |
| 730 | && --BmUSEFUL(prog->check_substr) < 0 |
| 731 | && prog->check_substr == prog->float_substr) |
| 732 | { |
| 733 | /* If flags & SOMETHING - do not do it many times on the same match */ |
| 734 | DEBUG_r(PerlIO_printf(Perl_debug_log, "... Disabling check substring...\n")); |
| 735 | SvREFCNT_dec(prog->check_substr); |
| 736 | prog->check_substr = Nullsv; /* disable */ |
| 737 | prog->float_substr = Nullsv; /* clear */ |
| 738 | check = Nullsv; /* abort */ |
| 739 | s = strpos; |
| 740 | /* XXXX This is a remnant of the old implementation. It |
| 741 | looks wasteful, since now INTUIT can use many |
| 742 | other heuristics. */ |
| 743 | prog->reganch &= ~RE_USE_INTUIT; |
| 744 | } |
| 745 | else |
| 746 | s = strpos; |
| 747 | } |
| 748 | |
| 749 | /* Last resort... */ |
| 750 | /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */ |
| 751 | if (prog->regstclass) { |
| 752 | /* minlen == 0 is possible if regstclass is \b or \B, |
| 753 | and the fixed substr is ''$. |
| 754 | Since minlen is already taken into account, s+1 is before strend; |
| 755 | accidentally, minlen >= 1 guaranties no false positives at s + 1 |
| 756 | even for \b or \B. But (minlen? 1 : 0) below assumes that |
| 757 | regstclass does not come from lookahead... */ |
| 758 | /* If regstclass takes bytelength more than 1: If charlength==1, OK. |
| 759 | This leaves EXACTF only, which is dealt with in find_byclass(). */ |
| 760 | U8* str = (U8*)STRING(prog->regstclass); |
| 761 | int cl_l = (PL_regkind[(U8)OP(prog->regstclass)] == EXACT |
| 762 | ? CHR_DIST(str+STR_LEN(prog->regstclass), str) |
| 763 | : 1); |
| 764 | char *endpos = (prog->anchored_substr || ml_anch) |
| 765 | ? HOP3c(s, (prog->minlen ? cl_l : 0), strend) |
| 766 | : (prog->float_substr |
| 767 | ? HOP3c(HOP3c(check_at, -start_shift, strbeg), |
| 768 | cl_l, strend) |
| 769 | : strend); |
| 770 | char *startpos = strbeg; |
| 771 | |
| 772 | t = s; |
| 773 | if (prog->reganch & ROPT_UTF8) { |
| 774 | PL_regdata = prog->data; |
| 775 | PL_bostr = startpos; |
| 776 | } |
| 777 | s = find_byclass(prog, prog->regstclass, s, endpos, startpos, 1); |
| 778 | if (!s) { |
| 779 | #ifdef DEBUGGING |
| 780 | char *what = 0; |
| 781 | #endif |
| 782 | if (endpos == strend) { |
| 783 | DEBUG_r( PerlIO_printf(Perl_debug_log, |
| 784 | "Could not match STCLASS...\n") ); |
| 785 | goto fail; |
| 786 | } |
| 787 | DEBUG_r( PerlIO_printf(Perl_debug_log, |
| 788 | "This position contradicts STCLASS...\n") ); |
| 789 | if ((prog->reganch & ROPT_ANCH) && !ml_anch) |
| 790 | goto fail; |
| 791 | /* Contradict one of substrings */ |
| 792 | if (prog->anchored_substr) { |
| 793 | if (prog->anchored_substr == check) { |
| 794 | DEBUG_r( what = "anchored" ); |
| 795 | hop_and_restart: |
| 796 | s = HOP3c(t, 1, strend); |
| 797 | if (s + start_shift + end_shift > strend) { |
| 798 | /* XXXX Should be taken into account earlier? */ |
| 799 | DEBUG_r( PerlIO_printf(Perl_debug_log, |
| 800 | "Could not match STCLASS...\n") ); |
| 801 | goto fail; |
| 802 | } |
| 803 | if (!check) |
| 804 | goto giveup; |
| 805 | DEBUG_r( PerlIO_printf(Perl_debug_log, |
| 806 | "Looking for %s substr starting at offset %ld...\n", |
| 807 | what, (long)(s + start_shift - i_strpos)) ); |
| 808 | goto restart; |
| 809 | } |
| 810 | /* Have both, check_string is floating */ |
| 811 | if (t + start_shift >= check_at) /* Contradicts floating=check */ |
| 812 | goto retry_floating_check; |
| 813 | /* Recheck anchored substring, but not floating... */ |
| 814 | s = check_at; |
| 815 | if (!check) |
| 816 | goto giveup; |
| 817 | DEBUG_r( PerlIO_printf(Perl_debug_log, |
| 818 | "Looking for anchored substr starting at offset %ld...\n", |
| 819 | (long)(other_last - i_strpos)) ); |
| 820 | goto do_other_anchored; |
| 821 | } |
| 822 | /* Another way we could have checked stclass at the |
| 823 | current position only: */ |
| 824 | if (ml_anch) { |
| 825 | s = t = t + 1; |
| 826 | if (!check) |
| 827 | goto giveup; |
| 828 | DEBUG_r( PerlIO_printf(Perl_debug_log, |
| 829 | "Looking for /%s^%s/m starting at offset %ld...\n", |
| 830 | PL_colors[0],PL_colors[1], (long)(t - i_strpos)) ); |
| 831 | goto try_at_offset; |
| 832 | } |
| 833 | if (!prog->float_substr) /* Could have been deleted */ |
| 834 | goto fail; |
| 835 | /* Check is floating subtring. */ |
| 836 | retry_floating_check: |
| 837 | t = check_at - start_shift; |
| 838 | DEBUG_r( what = "floating" ); |
| 839 | goto hop_and_restart; |
| 840 | } |
| 841 | if (t != s) { |
| 842 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
| 843 | "By STCLASS: moving %ld --> %ld\n", |
| 844 | (long)(t - i_strpos), (long)(s - i_strpos)) |
| 845 | ); |
| 846 | } |
| 847 | else { |
| 848 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
| 849 | "Does not contradict STCLASS...\n"); |
| 850 | ); |
| 851 | } |
| 852 | } |
| 853 | giveup: |
| 854 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%s%s:%s match at offset %ld\n", |
| 855 | PL_colors[4], (check ? "Guessed" : "Giving up"), |
| 856 | PL_colors[5], (long)(s - i_strpos)) ); |
| 857 | return s; |
| 858 | |
| 859 | fail_finish: /* Substring not found */ |
| 860 | if (prog->check_substr) /* could be removed already */ |
| 861 | BmUSEFUL(prog->check_substr) += 5; /* hooray */ |
| 862 | fail: |
| 863 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n", |
| 864 | PL_colors[4],PL_colors[5])); |
| 865 | return Nullch; |
| 866 | } |
| 867 | |
| 868 | /* We know what class REx starts with. Try to find this position... */ |
| 869 | STATIC char * |
| 870 | S_find_byclass(pTHX_ regexp * prog, regnode *c, char *s, char *strend, char *startpos, I32 norun) |
| 871 | { |
| 872 | I32 doevery = (prog->reganch & ROPT_SKIP) == 0; |
| 873 | char *m; |
| 874 | STRLEN ln; |
| 875 | unsigned int c1; |
| 876 | unsigned int c2; |
| 877 | char *e; |
| 878 | register I32 tmp = 1; /* Scratch variable? */ |
| 879 | register bool do_utf8 = DO_UTF8(PL_reg_sv); |
| 880 | |
| 881 | /* We know what class it must start with. */ |
| 882 | switch (OP(c)) { |
| 883 | case ANYOF: |
| 884 | while (s < strend) { |
| 885 | if (reginclass(c, (U8*)s, do_utf8)) { |
| 886 | if (tmp && (norun || regtry(prog, s))) |
| 887 | goto got_it; |
| 888 | else |
| 889 | tmp = doevery; |
| 890 | } |
| 891 | else |
| 892 | tmp = 1; |
| 893 | s += do_utf8 ? UTF8SKIP(s) : 1; |
| 894 | } |
| 895 | break; |
| 896 | case EXACTF: |
| 897 | m = STRING(c); |
| 898 | ln = STR_LEN(c); |
| 899 | if (UTF) { |
| 900 | c1 = to_utf8_lower((U8*)m); |
| 901 | c2 = to_utf8_upper((U8*)m); |
| 902 | } |
| 903 | else { |
| 904 | c1 = *(U8*)m; |
| 905 | c2 = PL_fold[c1]; |
| 906 | } |
| 907 | goto do_exactf; |
| 908 | case EXACTFL: |
| 909 | m = STRING(c); |
| 910 | ln = STR_LEN(c); |
| 911 | c1 = *(U8*)m; |
| 912 | c2 = PL_fold_locale[c1]; |
| 913 | do_exactf: |
| 914 | e = strend - ln; |
| 915 | |
| 916 | if (norun && e < s) |
| 917 | e = s; /* Due to minlen logic of intuit() */ |
| 918 | |
| 919 | if (do_utf8) { |
| 920 | STRLEN len; |
| 921 | if (c1 == c2) |
| 922 | while (s <= e) { |
| 923 | if ( utf8_to_uvchr((U8*)s, &len) == c1 |
| 924 | && regtry(prog, s) ) |
| 925 | goto got_it; |
| 926 | s += len; |
| 927 | } |
| 928 | else |
| 929 | while (s <= e) { |
| 930 | UV c = utf8_to_uvchr((U8*)s, &len); |
| 931 | if ( (c == c1 || c == c2) && regtry(prog, s) ) |
| 932 | goto got_it; |
| 933 | s += len; |
| 934 | } |
| 935 | } |
| 936 | else { |
| 937 | if (c1 == c2) |
| 938 | while (s <= e) { |
| 939 | if ( *(U8*)s == c1 |
| 940 | && (ln == 1 || !(OP(c) == EXACTF |
| 941 | ? ibcmp(s, m, ln) |
| 942 | : ibcmp_locale(s, m, ln))) |
| 943 | && (norun || regtry(prog, s)) ) |
| 944 | goto got_it; |
| 945 | s++; |
| 946 | } |
| 947 | else |
| 948 | while (s <= e) { |
| 949 | if ( (*(U8*)s == c1 || *(U8*)s == c2) |
| 950 | && (ln == 1 || !(OP(c) == EXACTF |
| 951 | ? ibcmp(s, m, ln) |
| 952 | : ibcmp_locale(s, m, ln))) |
| 953 | && (norun || regtry(prog, s)) ) |
| 954 | goto got_it; |
| 955 | s++; |
| 956 | } |
| 957 | } |
| 958 | break; |
| 959 | case BOUNDL: |
| 960 | PL_reg_flags |= RF_tainted; |
| 961 | /* FALL THROUGH */ |
| 962 | case BOUND: |
| 963 | if (do_utf8) { |
| 964 | if (s == PL_bostr) |
| 965 | tmp = '\n'; |
| 966 | else { |
| 967 | U8 *r = reghop3((U8*)s, -1, (U8*)startpos); |
| 968 | |
| 969 | if (s > (char*)r) |
| 970 | tmp = (I32)utf8n_to_uvchr(r, s - (char*)r, 0, 0); |
| 971 | } |
| 972 | tmp = ((OP(c) == BOUND ? |
| 973 | isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0); |
| 974 | LOAD_UTF8_CHARCLASS(alnum,"a"); |
| 975 | while (s < strend) { |
| 976 | if (tmp == !(OP(c) == BOUND ? |
| 977 | swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) : |
| 978 | isALNUM_LC_utf8((U8*)s))) |
| 979 | { |
| 980 | tmp = !tmp; |
| 981 | if ((norun || regtry(prog, s))) |
| 982 | goto got_it; |
| 983 | } |
| 984 | s += UTF8SKIP(s); |
| 985 | } |
| 986 | } |
| 987 | else { |
| 988 | tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n'; |
| 989 | tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0); |
| 990 | while (s < strend) { |
| 991 | if (tmp == |
| 992 | !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) { |
| 993 | tmp = !tmp; |
| 994 | if ((norun || regtry(prog, s))) |
| 995 | goto got_it; |
| 996 | } |
| 997 | s++; |
| 998 | } |
| 999 | } |
| 1000 | if ((!prog->minlen && tmp) && (norun || regtry(prog, s))) |
| 1001 | goto got_it; |
| 1002 | break; |
| 1003 | case NBOUNDL: |
| 1004 | PL_reg_flags |= RF_tainted; |
| 1005 | /* FALL THROUGH */ |
| 1006 | case NBOUND: |
| 1007 | if (do_utf8) { |
| 1008 | if (s == PL_bostr) |
| 1009 | tmp = '\n'; |
| 1010 | else { |
| 1011 | U8 *r = reghop3((U8*)s, -1, (U8*)startpos); |
| 1012 | |
| 1013 | if (s > (char*)r) |
| 1014 | tmp = (I32)utf8n_to_uvchr(r, s - (char*)r, 0, 0); |
| 1015 | } |
| 1016 | tmp = ((OP(c) == NBOUND ? |
| 1017 | isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0); |
| 1018 | LOAD_UTF8_CHARCLASS(alnum,"a"); |
| 1019 | while (s < strend) { |
| 1020 | if (tmp == !(OP(c) == NBOUND ? |
| 1021 | swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8) : |
| 1022 | isALNUM_LC_utf8((U8*)s))) |
| 1023 | tmp = !tmp; |
| 1024 | else if ((norun || regtry(prog, s))) |
| 1025 | goto got_it; |
| 1026 | s += UTF8SKIP(s); |
| 1027 | } |
| 1028 | } |
| 1029 | else { |
| 1030 | tmp = (s != PL_bostr) ? UCHARAT(s - 1) : '\n'; |
| 1031 | tmp = ((OP(c) == NBOUND ? |
| 1032 | isALNUM(tmp) : isALNUM_LC(tmp)) != 0); |
| 1033 | while (s < strend) { |
| 1034 | if (tmp == |
| 1035 | !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s))) |
| 1036 | tmp = !tmp; |
| 1037 | else if ((norun || regtry(prog, s))) |
| 1038 | goto got_it; |
| 1039 | s++; |
| 1040 | } |
| 1041 | } |
| 1042 | if ((!prog->minlen && !tmp) && (norun || regtry(prog, s))) |
| 1043 | goto got_it; |
| 1044 | break; |
| 1045 | case ALNUM: |
| 1046 | if (do_utf8) { |
| 1047 | LOAD_UTF8_CHARCLASS(alnum,"a"); |
| 1048 | while (s < strend) { |
| 1049 | if (swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8)) { |
| 1050 | if (tmp && (norun || regtry(prog, s))) |
| 1051 | goto got_it; |
| 1052 | else |
| 1053 | tmp = doevery; |
| 1054 | } |
| 1055 | else |
| 1056 | tmp = 1; |
| 1057 | s += UTF8SKIP(s); |
| 1058 | } |
| 1059 | } |
| 1060 | else { |
| 1061 | while (s < strend) { |
| 1062 | if (isALNUM(*s)) { |
| 1063 | if (tmp && (norun || regtry(prog, s))) |
| 1064 | goto got_it; |
| 1065 | else |
| 1066 | tmp = doevery; |
| 1067 | } |
| 1068 | else |
| 1069 | tmp = 1; |
| 1070 | s++; |
| 1071 | } |
| 1072 | } |
| 1073 | break; |
| 1074 | case ALNUML: |
| 1075 | PL_reg_flags |= RF_tainted; |
| 1076 | if (do_utf8) { |
| 1077 | while (s < strend) { |
| 1078 | if (isALNUM_LC_utf8((U8*)s)) { |
| 1079 | if (tmp && (norun || regtry(prog, s))) |
| 1080 | goto got_it; |
| 1081 | else |
| 1082 | tmp = doevery; |
| 1083 | } |
| 1084 | else |
| 1085 | tmp = 1; |
| 1086 | s += UTF8SKIP(s); |
| 1087 | } |
| 1088 | } |
| 1089 | else { |
| 1090 | while (s < strend) { |
| 1091 | if (isALNUM_LC(*s)) { |
| 1092 | if (tmp && (norun || regtry(prog, s))) |
| 1093 | goto got_it; |
| 1094 | else |
| 1095 | tmp = doevery; |
| 1096 | } |
| 1097 | else |
| 1098 | tmp = 1; |
| 1099 | s++; |
| 1100 | } |
| 1101 | } |
| 1102 | break; |
| 1103 | case NALNUM: |
| 1104 | if (do_utf8) { |
| 1105 | LOAD_UTF8_CHARCLASS(alnum,"a"); |
| 1106 | while (s < strend) { |
| 1107 | if (!swash_fetch(PL_utf8_alnum, (U8*)s, do_utf8)) { |
| 1108 | if (tmp && (norun || regtry(prog, s))) |
| 1109 | goto got_it; |
| 1110 | else |
| 1111 | tmp = doevery; |
| 1112 | } |
| 1113 | else |
| 1114 | tmp = 1; |
| 1115 | s += UTF8SKIP(s); |
| 1116 | } |
| 1117 | } |
| 1118 | else { |
| 1119 | while (s < strend) { |
| 1120 | if (!isALNUM(*s)) { |
| 1121 | if (tmp && (norun || regtry(prog, s))) |
| 1122 | goto got_it; |
| 1123 | else |
| 1124 | tmp = doevery; |
| 1125 | } |
| 1126 | else |
| 1127 | tmp = 1; |
| 1128 | s++; |
| 1129 | } |
| 1130 | } |
| 1131 | break; |
| 1132 | case NALNUML: |
| 1133 | PL_reg_flags |= RF_tainted; |
| 1134 | if (do_utf8) { |
| 1135 | while (s < strend) { |
| 1136 | if (!isALNUM_LC_utf8((U8*)s)) { |
| 1137 | if (tmp && (norun || regtry(prog, s))) |
| 1138 | goto got_it; |
| 1139 | else |
| 1140 | tmp = doevery; |
| 1141 | } |
| 1142 | else |
| 1143 | tmp = 1; |
| 1144 | s += UTF8SKIP(s); |
| 1145 | } |
| 1146 | } |
| 1147 | else { |
| 1148 | while (s < strend) { |
| 1149 | if (!isALNUM_LC(*s)) { |
| 1150 | if (tmp && (norun || regtry(prog, s))) |
| 1151 | goto got_it; |
| 1152 | else |
| 1153 | tmp = doevery; |
| 1154 | } |
| 1155 | else |
| 1156 | tmp = 1; |
| 1157 | s++; |
| 1158 | } |
| 1159 | } |
| 1160 | break; |
| 1161 | case SPACE: |
| 1162 | if (do_utf8) { |
| 1163 | LOAD_UTF8_CHARCLASS(space," "); |
| 1164 | while (s < strend) { |
| 1165 | if (*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s, do_utf8)) { |
| 1166 | if (tmp && (norun || regtry(prog, s))) |
| 1167 | goto got_it; |
| 1168 | else |
| 1169 | tmp = doevery; |
| 1170 | } |
| 1171 | else |
| 1172 | tmp = 1; |
| 1173 | s += UTF8SKIP(s); |
| 1174 | } |
| 1175 | } |
| 1176 | else { |
| 1177 | while (s < strend) { |
| 1178 | if (isSPACE(*s)) { |
| 1179 | if (tmp && (norun || regtry(prog, s))) |
| 1180 | goto got_it; |
| 1181 | else |
| 1182 | tmp = doevery; |
| 1183 | } |
| 1184 | else |
| 1185 | tmp = 1; |
| 1186 | s++; |
| 1187 | } |
| 1188 | } |
| 1189 | break; |
| 1190 | case SPACEL: |
| 1191 | PL_reg_flags |= RF_tainted; |
| 1192 | if (do_utf8) { |
| 1193 | while (s < strend) { |
| 1194 | if (*s == ' ' || isSPACE_LC_utf8((U8*)s)) { |
| 1195 | if (tmp && (norun || regtry(prog, s))) |
| 1196 | goto got_it; |
| 1197 | else |
| 1198 | tmp = doevery; |
| 1199 | } |
| 1200 | else |
| 1201 | tmp = 1; |
| 1202 | s += UTF8SKIP(s); |
| 1203 | } |
| 1204 | } |
| 1205 | else { |
| 1206 | while (s < strend) { |
| 1207 | if (isSPACE_LC(*s)) { |
| 1208 | if (tmp && (norun || regtry(prog, s))) |
| 1209 | goto got_it; |
| 1210 | else |
| 1211 | tmp = doevery; |
| 1212 | } |
| 1213 | else |
| 1214 | tmp = 1; |
| 1215 | s++; |
| 1216 | } |
| 1217 | } |
| 1218 | break; |
| 1219 | case NSPACE: |
| 1220 | if (do_utf8) { |
| 1221 | LOAD_UTF8_CHARCLASS(space," "); |
| 1222 | while (s < strend) { |
| 1223 | if (!(*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s, do_utf8))) { |
| 1224 | if (tmp && (norun || regtry(prog, s))) |
| 1225 | goto got_it; |
| 1226 | else |
| 1227 | tmp = doevery; |
| 1228 | } |
| 1229 | else |
| 1230 | tmp = 1; |
| 1231 | s += UTF8SKIP(s); |
| 1232 | } |
| 1233 | } |
| 1234 | else { |
| 1235 | while (s < strend) { |
| 1236 | if (!isSPACE(*s)) { |
| 1237 | if (tmp && (norun || regtry(prog, s))) |
| 1238 | goto got_it; |
| 1239 | else |
| 1240 | tmp = doevery; |
| 1241 | } |
| 1242 | else |
| 1243 | tmp = 1; |
| 1244 | s++; |
| 1245 | } |
| 1246 | } |
| 1247 | break; |
| 1248 | case NSPACEL: |
| 1249 | PL_reg_flags |= RF_tainted; |
| 1250 | if (do_utf8) { |
| 1251 | while (s < strend) { |
| 1252 | if (!(*s == ' ' || isSPACE_LC_utf8((U8*)s))) { |
| 1253 | if (tmp && (norun || regtry(prog, s))) |
| 1254 | goto got_it; |
| 1255 | else |
| 1256 | tmp = doevery; |
| 1257 | } |
| 1258 | else |
| 1259 | tmp = 1; |
| 1260 | s += UTF8SKIP(s); |
| 1261 | } |
| 1262 | } |
| 1263 | else { |
| 1264 | while (s < strend) { |
| 1265 | if (!isSPACE_LC(*s)) { |
| 1266 | if (tmp && (norun || regtry(prog, s))) |
| 1267 | goto got_it; |
| 1268 | else |
| 1269 | tmp = doevery; |
| 1270 | } |
| 1271 | else |
| 1272 | tmp = 1; |
| 1273 | s++; |
| 1274 | } |
| 1275 | } |
| 1276 | break; |
| 1277 | case DIGIT: |
| 1278 | if (do_utf8) { |
| 1279 | LOAD_UTF8_CHARCLASS(digit,"0"); |
| 1280 | while (s < strend) { |
| 1281 | if (swash_fetch(PL_utf8_digit,(U8*)s, do_utf8)) { |
| 1282 | if (tmp && (norun || regtry(prog, s))) |
| 1283 | goto got_it; |
| 1284 | else |
| 1285 | tmp = doevery; |
| 1286 | } |
| 1287 | else |
| 1288 | tmp = 1; |
| 1289 | s += UTF8SKIP(s); |
| 1290 | } |
| 1291 | } |
| 1292 | else { |
| 1293 | while (s < strend) { |
| 1294 | if (isDIGIT(*s)) { |
| 1295 | if (tmp && (norun || regtry(prog, s))) |
| 1296 | goto got_it; |
| 1297 | else |
| 1298 | tmp = doevery; |
| 1299 | } |
| 1300 | else |
| 1301 | tmp = 1; |
| 1302 | s++; |
| 1303 | } |
| 1304 | } |
| 1305 | break; |
| 1306 | case DIGITL: |
| 1307 | PL_reg_flags |= RF_tainted; |
| 1308 | if (do_utf8) { |
| 1309 | while (s < strend) { |
| 1310 | if (isDIGIT_LC_utf8((U8*)s)) { |
| 1311 | if (tmp && (norun || regtry(prog, s))) |
| 1312 | goto got_it; |
| 1313 | else |
| 1314 | tmp = doevery; |
| 1315 | } |
| 1316 | else |
| 1317 | tmp = 1; |
| 1318 | s += UTF8SKIP(s); |
| 1319 | } |
| 1320 | } |
| 1321 | else { |
| 1322 | while (s < strend) { |
| 1323 | if (isDIGIT_LC(*s)) { |
| 1324 | if (tmp && (norun || regtry(prog, s))) |
| 1325 | goto got_it; |
| 1326 | else |
| 1327 | tmp = doevery; |
| 1328 | } |
| 1329 | else |
| 1330 | tmp = 1; |
| 1331 | s++; |
| 1332 | } |
| 1333 | } |
| 1334 | break; |
| 1335 | case NDIGIT: |
| 1336 | if (do_utf8) { |
| 1337 | LOAD_UTF8_CHARCLASS(digit,"0"); |
| 1338 | while (s < strend) { |
| 1339 | if (!swash_fetch(PL_utf8_digit,(U8*)s, do_utf8)) { |
| 1340 | if (tmp && (norun || regtry(prog, s))) |
| 1341 | goto got_it; |
| 1342 | else |
| 1343 | tmp = doevery; |
| 1344 | } |
| 1345 | else |
| 1346 | tmp = 1; |
| 1347 | s += UTF8SKIP(s); |
| 1348 | } |
| 1349 | } |
| 1350 | else { |
| 1351 | while (s < strend) { |
| 1352 | if (!isDIGIT(*s)) { |
| 1353 | if (tmp && (norun || regtry(prog, s))) |
| 1354 | goto got_it; |
| 1355 | else |
| 1356 | tmp = doevery; |
| 1357 | } |
| 1358 | else |
| 1359 | tmp = 1; |
| 1360 | s++; |
| 1361 | } |
| 1362 | } |
| 1363 | break; |
| 1364 | case NDIGITL: |
| 1365 | PL_reg_flags |= RF_tainted; |
| 1366 | if (do_utf8) { |
| 1367 | while (s < strend) { |
| 1368 | if (!isDIGIT_LC_utf8((U8*)s)) { |
| 1369 | if (tmp && (norun || regtry(prog, s))) |
| 1370 | goto got_it; |
| 1371 | else |
| 1372 | tmp = doevery; |
| 1373 | } |
| 1374 | else |
| 1375 | tmp = 1; |
| 1376 | s += UTF8SKIP(s); |
| 1377 | } |
| 1378 | } |
| 1379 | else { |
| 1380 | while (s < strend) { |
| 1381 | if (!isDIGIT_LC(*s)) { |
| 1382 | if (tmp && (norun || regtry(prog, s))) |
| 1383 | goto got_it; |
| 1384 | else |
| 1385 | tmp = doevery; |
| 1386 | } |
| 1387 | else |
| 1388 | tmp = 1; |
| 1389 | s++; |
| 1390 | } |
| 1391 | } |
| 1392 | break; |
| 1393 | default: |
| 1394 | Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c)); |
| 1395 | break; |
| 1396 | } |
| 1397 | return 0; |
| 1398 | got_it: |
| 1399 | return s; |
| 1400 | } |
| 1401 | |
| 1402 | /* |
| 1403 | - regexec_flags - match a regexp against a string |
| 1404 | */ |
| 1405 | I32 |
| 1406 | Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char *strend, |
| 1407 | char *strbeg, I32 minend, SV *sv, void *data, U32 flags) |
| 1408 | /* strend: pointer to null at end of string */ |
| 1409 | /* strbeg: real beginning of string */ |
| 1410 | /* minend: end of match must be >=minend after stringarg. */ |
| 1411 | /* data: May be used for some additional optimizations. */ |
| 1412 | /* nosave: For optimizations. */ |
| 1413 | { |
| 1414 | register char *s; |
| 1415 | register regnode *c; |
| 1416 | register char *startpos = stringarg; |
| 1417 | I32 minlen; /* must match at least this many chars */ |
| 1418 | I32 dontbother = 0; /* how many characters not to try at end */ |
| 1419 | /* I32 start_shift = 0; */ /* Offset of the start to find |
| 1420 | constant substr. */ /* CC */ |
| 1421 | I32 end_shift = 0; /* Same for the end. */ /* CC */ |
| 1422 | I32 scream_pos = -1; /* Internal iterator of scream. */ |
| 1423 | char *scream_olds; |
| 1424 | SV* oreplsv = GvSV(PL_replgv); |
| 1425 | bool do_utf8 = DO_UTF8(sv); |
| 1426 | |
| 1427 | PL_regcc = 0; |
| 1428 | |
| 1429 | cache_re(prog); |
| 1430 | #ifdef DEBUGGING |
| 1431 | PL_regnarrate = DEBUG_r_TEST; |
| 1432 | #endif |
| 1433 | |
| 1434 | /* Be paranoid... */ |
| 1435 | if (prog == NULL || startpos == NULL) { |
| 1436 | Perl_croak(aTHX_ "NULL regexp parameter"); |
| 1437 | return 0; |
| 1438 | } |
| 1439 | |
| 1440 | minlen = prog->minlen; |
| 1441 | if (do_utf8) { |
| 1442 | if (!(prog->reganch & ROPT_SANY_SEEN)) |
| 1443 | if (utf8_distance((U8*)strend, (U8*)startpos) < minlen) goto phooey; |
| 1444 | } |
| 1445 | else { |
| 1446 | if (strend - startpos < minlen) goto phooey; |
| 1447 | } |
| 1448 | |
| 1449 | /* Check validity of program. */ |
| 1450 | if (UCHARAT(prog->program) != REG_MAGIC) { |
| 1451 | Perl_croak(aTHX_ "corrupted regexp program"); |
| 1452 | } |
| 1453 | |
| 1454 | PL_reg_flags = 0; |
| 1455 | PL_reg_eval_set = 0; |
| 1456 | PL_reg_maxiter = 0; |
| 1457 | |
| 1458 | if (prog->reganch & ROPT_UTF8) |
| 1459 | PL_reg_flags |= RF_utf8; |
| 1460 | |
| 1461 | /* Mark beginning of line for ^ and lookbehind. */ |
| 1462 | PL_regbol = startpos; |
| 1463 | PL_bostr = strbeg; |
| 1464 | PL_reg_sv = sv; |
| 1465 | |
| 1466 | /* Mark end of line for $ (and such) */ |
| 1467 | PL_regeol = strend; |
| 1468 | |
| 1469 | /* see how far we have to get to not match where we matched before */ |
| 1470 | PL_regtill = startpos+minend; |
| 1471 | |
| 1472 | /* We start without call_cc context. */ |
| 1473 | PL_reg_call_cc = 0; |
| 1474 | |
| 1475 | /* If there is a "must appear" string, look for it. */ |
| 1476 | s = startpos; |
| 1477 | |
| 1478 | if (prog->reganch & ROPT_GPOS_SEEN) { /* Need to have PL_reg_ganch */ |
| 1479 | MAGIC *mg; |
| 1480 | |
| 1481 | if (flags & REXEC_IGNOREPOS) /* Means: check only at start */ |
| 1482 | PL_reg_ganch = startpos; |
| 1483 | else if (sv && SvTYPE(sv) >= SVt_PVMG |
| 1484 | && SvMAGIC(sv) |
| 1485 | && (mg = mg_find(sv, PERL_MAGIC_regex_global)) |
| 1486 | && mg->mg_len >= 0) { |
| 1487 | PL_reg_ganch = strbeg + mg->mg_len; /* Defined pos() */ |
| 1488 | if (prog->reganch & ROPT_ANCH_GPOS) { |
| 1489 | if (s > PL_reg_ganch) |
| 1490 | goto phooey; |
| 1491 | s = PL_reg_ganch; |
| 1492 | } |
| 1493 | } |
| 1494 | else /* pos() not defined */ |
| 1495 | PL_reg_ganch = strbeg; |
| 1496 | } |
| 1497 | |
| 1498 | if (do_utf8 == (UTF!=0) && |
| 1499 | !(flags & REXEC_CHECKED) && prog->check_substr != Nullsv) { |
| 1500 | re_scream_pos_data d; |
| 1501 | |
| 1502 | d.scream_olds = &scream_olds; |
| 1503 | d.scream_pos = &scream_pos; |
| 1504 | s = re_intuit_start(prog, sv, s, strend, flags, &d); |
| 1505 | if (!s) |
| 1506 | goto phooey; /* not present */ |
| 1507 | } |
| 1508 | |
| 1509 | DEBUG_r( if (!PL_colorset) reginitcolors() ); |
| 1510 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
| 1511 | "%sMatching REx%s `%s%.60s%s%s' against `%s%.*s%s%s'\n", |
| 1512 | PL_colors[4],PL_colors[5],PL_colors[0], |
| 1513 | prog->precomp, |
| 1514 | PL_colors[1], |
| 1515 | (strlen(prog->precomp) > 60 ? "..." : ""), |
| 1516 | PL_colors[0], |
| 1517 | (int)(strend - startpos > 60 ? 60 : strend - startpos), |
| 1518 | startpos, PL_colors[1], |
| 1519 | (strend - startpos > 60 ? "..." : "")) |
| 1520 | ); |
| 1521 | |
| 1522 | /* Simplest case: anchored match need be tried only once. */ |
| 1523 | /* [unless only anchor is BOL and multiline is set] */ |
| 1524 | if (prog->reganch & (ROPT_ANCH & ~ROPT_ANCH_GPOS)) { |
| 1525 | if (s == startpos && regtry(prog, startpos)) |
| 1526 | goto got_it; |
| 1527 | else if (PL_multiline || (prog->reganch & ROPT_IMPLICIT) |
| 1528 | || (prog->reganch & ROPT_ANCH_MBOL)) /* XXXX SBOL? */ |
| 1529 | { |
| 1530 | char *end; |
| 1531 | |
| 1532 | if (minlen) |
| 1533 | dontbother = minlen - 1; |
| 1534 | end = HOP3c(strend, -dontbother, strbeg) - 1; |
| 1535 | /* for multiline we only have to try after newlines */ |
| 1536 | if (prog->check_substr) { |
| 1537 | if (s == startpos) |
| 1538 | goto after_try; |
| 1539 | while (1) { |
| 1540 | if (regtry(prog, s)) |
| 1541 | goto got_it; |
| 1542 | after_try: |
| 1543 | if (s >= end) |
| 1544 | goto phooey; |
| 1545 | if (prog->reganch & RE_USE_INTUIT) { |
| 1546 | s = re_intuit_start(prog, sv, s + 1, strend, flags, NULL); |
| 1547 | if (!s) |
| 1548 | goto phooey; |
| 1549 | } |
| 1550 | else |
| 1551 | s++; |
| 1552 | } |
| 1553 | } else { |
| 1554 | if (s > startpos) |
| 1555 | s--; |
| 1556 | while (s < end) { |
| 1557 | if (*s++ == '\n') { /* don't need PL_utf8skip here */ |
| 1558 | if (regtry(prog, s)) |
| 1559 | goto got_it; |
| 1560 | } |
| 1561 | } |
| 1562 | } |
| 1563 | } |
| 1564 | goto phooey; |
| 1565 | } else if (prog->reganch & ROPT_ANCH_GPOS) { |
| 1566 | if (regtry(prog, PL_reg_ganch)) |
| 1567 | goto got_it; |
| 1568 | goto phooey; |
| 1569 | } |
| 1570 | |
| 1571 | /* Messy cases: unanchored match. */ |
| 1572 | if (prog->anchored_substr && prog->reganch & ROPT_SKIP) { |
| 1573 | /* we have /x+whatever/ */ |
| 1574 | /* it must be a one character string (XXXX Except UTF?) */ |
| 1575 | char ch = SvPVX(prog->anchored_substr)[0]; |
| 1576 | #ifdef DEBUGGING |
| 1577 | int did_match = 0; |
| 1578 | #endif |
| 1579 | |
| 1580 | if (do_utf8) { |
| 1581 | while (s < strend) { |
| 1582 | if (*s == ch) { |
| 1583 | DEBUG_r( did_match = 1 ); |
| 1584 | if (regtry(prog, s)) goto got_it; |
| 1585 | s += UTF8SKIP(s); |
| 1586 | while (s < strend && *s == ch) |
| 1587 | s += UTF8SKIP(s); |
| 1588 | } |
| 1589 | s += UTF8SKIP(s); |
| 1590 | } |
| 1591 | } |
| 1592 | else { |
| 1593 | while (s < strend) { |
| 1594 | if (*s == ch) { |
| 1595 | DEBUG_r( did_match = 1 ); |
| 1596 | if (regtry(prog, s)) goto got_it; |
| 1597 | s++; |
| 1598 | while (s < strend && *s == ch) |
| 1599 | s++; |
| 1600 | } |
| 1601 | s++; |
| 1602 | } |
| 1603 | } |
| 1604 | DEBUG_r(if (!did_match) |
| 1605 | PerlIO_printf(Perl_debug_log, |
| 1606 | "Did not find anchored character...\n") |
| 1607 | ); |
| 1608 | } |
| 1609 | /*SUPPRESS 560*/ |
| 1610 | else if (do_utf8 == (UTF!=0) && |
| 1611 | (prog->anchored_substr != Nullsv |
| 1612 | || (prog->float_substr != Nullsv |
| 1613 | && prog->float_max_offset < strend - s))) { |
| 1614 | SV *must = prog->anchored_substr |
| 1615 | ? prog->anchored_substr : prog->float_substr; |
| 1616 | I32 back_max = |
| 1617 | prog->anchored_substr ? prog->anchored_offset : prog->float_max_offset; |
| 1618 | I32 back_min = |
| 1619 | prog->anchored_substr ? prog->anchored_offset : prog->float_min_offset; |
| 1620 | char *last = HOP3c(strend, /* Cannot start after this */ |
| 1621 | -(I32)(CHR_SVLEN(must) |
| 1622 | - (SvTAIL(must) != 0) + back_min), strbeg); |
| 1623 | char *last1; /* Last position checked before */ |
| 1624 | #ifdef DEBUGGING |
| 1625 | int did_match = 0; |
| 1626 | #endif |
| 1627 | |
| 1628 | if (s > PL_bostr) |
| 1629 | last1 = HOPc(s, -1); |
| 1630 | else |
| 1631 | last1 = s - 1; /* bogus */ |
| 1632 | |
| 1633 | /* XXXX check_substr already used to find `s', can optimize if |
| 1634 | check_substr==must. */ |
| 1635 | scream_pos = -1; |
| 1636 | dontbother = end_shift; |
| 1637 | strend = HOPc(strend, -dontbother); |
| 1638 | while ( (s <= last) && |
| 1639 | ((flags & REXEC_SCREAM) |
| 1640 | ? (s = screaminstr(sv, must, HOP3c(s, back_min, strend) - strbeg, |
| 1641 | end_shift, &scream_pos, 0)) |
| 1642 | : (s = fbm_instr((unsigned char*)HOP3(s, back_min, strend), |
| 1643 | (unsigned char*)strend, must, |
| 1644 | PL_multiline ? FBMrf_MULTILINE : 0))) ) { |
| 1645 | DEBUG_r( did_match = 1 ); |
| 1646 | if (HOPc(s, -back_max) > last1) { |
| 1647 | last1 = HOPc(s, -back_min); |
| 1648 | s = HOPc(s, -back_max); |
| 1649 | } |
| 1650 | else { |
| 1651 | char *t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1; |
| 1652 | |
| 1653 | last1 = HOPc(s, -back_min); |
| 1654 | s = t; |
| 1655 | } |
| 1656 | if (do_utf8) { |
| 1657 | while (s <= last1) { |
| 1658 | if (regtry(prog, s)) |
| 1659 | goto got_it; |
| 1660 | s += UTF8SKIP(s); |
| 1661 | } |
| 1662 | } |
| 1663 | else { |
| 1664 | while (s <= last1) { |
| 1665 | if (regtry(prog, s)) |
| 1666 | goto got_it; |
| 1667 | s++; |
| 1668 | } |
| 1669 | } |
| 1670 | } |
| 1671 | DEBUG_r(if (!did_match) |
| 1672 | PerlIO_printf(Perl_debug_log, |
| 1673 | "Did not find %s substr `%s%.*s%s'%s...\n", |
| 1674 | ((must == prog->anchored_substr) |
| 1675 | ? "anchored" : "floating"), |
| 1676 | PL_colors[0], |
| 1677 | (int)(SvCUR(must) - (SvTAIL(must)!=0)), |
| 1678 | SvPVX(must), |
| 1679 | PL_colors[1], (SvTAIL(must) ? "$" : "")) |
| 1680 | ); |
| 1681 | goto phooey; |
| 1682 | } |
| 1683 | else if ((c = prog->regstclass)) { |
| 1684 | if (minlen && PL_regkind[(U8)OP(prog->regstclass)] != EXACT) |
| 1685 | /* don't bother with what can't match */ |
| 1686 | strend = HOPc(strend, -(minlen - 1)); |
| 1687 | DEBUG_r({ |
| 1688 | SV *prop = sv_newmortal(); |
| 1689 | regprop(prop, c); |
| 1690 | PerlIO_printf(Perl_debug_log, "Matching stclass `%s' against `%s'\n", SvPVX(prop), s); |
| 1691 | }); |
| 1692 | if (find_byclass(prog, c, s, strend, startpos, 0)) |
| 1693 | goto got_it; |
| 1694 | DEBUG_r(PerlIO_printf(Perl_debug_log, "Contradicts stclass...\n")); |
| 1695 | } |
| 1696 | else { |
| 1697 | dontbother = 0; |
| 1698 | if (prog->float_substr != Nullsv) { /* Trim the end. */ |
| 1699 | char *last; |
| 1700 | |
| 1701 | if (flags & REXEC_SCREAM) { |
| 1702 | last = screaminstr(sv, prog->float_substr, s - strbeg, |
| 1703 | end_shift, &scream_pos, 1); /* last one */ |
| 1704 | if (!last) |
| 1705 | last = scream_olds; /* Only one occurrence. */ |
| 1706 | } |
| 1707 | else { |
| 1708 | STRLEN len; |
| 1709 | char *little = SvPV(prog->float_substr, len); |
| 1710 | |
| 1711 | if (SvTAIL(prog->float_substr)) { |
| 1712 | if (memEQ(strend - len + 1, little, len - 1)) |
| 1713 | last = strend - len + 1; |
| 1714 | else if (!PL_multiline) |
| 1715 | last = memEQ(strend - len, little, len) |
| 1716 | ? strend - len : Nullch; |
| 1717 | else |
| 1718 | goto find_last; |
| 1719 | } else { |
| 1720 | find_last: |
| 1721 | if (len) |
| 1722 | last = rninstr(s, strend, little, little + len); |
| 1723 | else |
| 1724 | last = strend; /* matching `$' */ |
| 1725 | } |
| 1726 | } |
| 1727 | if (last == NULL) { |
| 1728 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
| 1729 | "%sCan't trim the tail, match fails (should not happen)%s\n", |
| 1730 | PL_colors[4],PL_colors[5])); |
| 1731 | goto phooey; /* Should not happen! */ |
| 1732 | } |
| 1733 | dontbother = strend - last + prog->float_min_offset; |
| 1734 | } |
| 1735 | if (minlen && (dontbother < minlen)) |
| 1736 | dontbother = minlen - 1; |
| 1737 | strend -= dontbother; /* this one's always in bytes! */ |
| 1738 | /* We don't know much -- general case. */ |
| 1739 | if (do_utf8) { |
| 1740 | for (;;) { |
| 1741 | if (regtry(prog, s)) |
| 1742 | goto got_it; |
| 1743 | if (s >= strend) |
| 1744 | break; |
| 1745 | s += UTF8SKIP(s); |
| 1746 | }; |
| 1747 | } |
| 1748 | else { |
| 1749 | do { |
| 1750 | if (regtry(prog, s)) |
| 1751 | goto got_it; |
| 1752 | } while (s++ < strend); |
| 1753 | } |
| 1754 | } |
| 1755 | |
| 1756 | /* Failure. */ |
| 1757 | goto phooey; |
| 1758 | |
| 1759 | got_it: |
| 1760 | RX_MATCH_TAINTED_set(prog, PL_reg_flags & RF_tainted); |
| 1761 | |
| 1762 | if (PL_reg_eval_set) { |
| 1763 | /* Preserve the current value of $^R */ |
| 1764 | if (oreplsv != GvSV(PL_replgv)) |
| 1765 | sv_setsv(oreplsv, GvSV(PL_replgv));/* So that when GvSV(replgv) is |
| 1766 | restored, the value remains |
| 1767 | the same. */ |
| 1768 | restore_pos(aTHXo_ 0); |
| 1769 | } |
| 1770 | |
| 1771 | /* make sure $`, $&, $', and $digit will work later */ |
| 1772 | if ( !(flags & REXEC_NOT_FIRST) ) { |
| 1773 | if (RX_MATCH_COPIED(prog)) { |
| 1774 | Safefree(prog->subbeg); |
| 1775 | RX_MATCH_COPIED_off(prog); |
| 1776 | } |
| 1777 | if (flags & REXEC_COPY_STR) { |
| 1778 | I32 i = PL_regeol - startpos + (stringarg - strbeg); |
| 1779 | |
| 1780 | s = savepvn(strbeg, i); |
| 1781 | prog->subbeg = s; |
| 1782 | prog->sublen = i; |
| 1783 | RX_MATCH_COPIED_on(prog); |
| 1784 | } |
| 1785 | else { |
| 1786 | prog->subbeg = strbeg; |
| 1787 | prog->sublen = PL_regeol - strbeg; /* strend may have been modified */ |
| 1788 | } |
| 1789 | } |
| 1790 | |
| 1791 | return 1; |
| 1792 | |
| 1793 | phooey: |
| 1794 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%sMatch failed%s\n", |
| 1795 | PL_colors[4],PL_colors[5])); |
| 1796 | if (PL_reg_eval_set) |
| 1797 | restore_pos(aTHXo_ 0); |
| 1798 | return 0; |
| 1799 | } |
| 1800 | |
| 1801 | /* |
| 1802 | - regtry - try match at specific point |
| 1803 | */ |
| 1804 | STATIC I32 /* 0 failure, 1 success */ |
| 1805 | S_regtry(pTHX_ regexp *prog, char *startpos) |
| 1806 | { |
| 1807 | register I32 i; |
| 1808 | register I32 *sp; |
| 1809 | register I32 *ep; |
| 1810 | CHECKPOINT lastcp; |
| 1811 | |
| 1812 | #ifdef DEBUGGING |
| 1813 | PL_regindent = 0; /* XXXX Not good when matches are reenterable... */ |
| 1814 | #endif |
| 1815 | if ((prog->reganch & ROPT_EVAL_SEEN) && !PL_reg_eval_set) { |
| 1816 | MAGIC *mg; |
| 1817 | |
| 1818 | PL_reg_eval_set = RS_init; |
| 1819 | DEBUG_r(DEBUG_s( |
| 1820 | PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n", |
| 1821 | (IV)(PL_stack_sp - PL_stack_base)); |
| 1822 | )); |
| 1823 | SAVEI32(cxstack[cxstack_ix].blk_oldsp); |
| 1824 | cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base; |
| 1825 | /* Otherwise OP_NEXTSTATE will free whatever on stack now. */ |
| 1826 | SAVETMPS; |
| 1827 | /* Apparently this is not needed, judging by wantarray. */ |
| 1828 | /* SAVEI8(cxstack[cxstack_ix].blk_gimme); |
| 1829 | cxstack[cxstack_ix].blk_gimme = G_SCALAR; */ |
| 1830 | |
| 1831 | if (PL_reg_sv) { |
| 1832 | /* Make $_ available to executed code. */ |
| 1833 | if (PL_reg_sv != DEFSV) { |
| 1834 | /* SAVE_DEFSV does *not* suffice here for USE_THREADS */ |
| 1835 | SAVESPTR(DEFSV); |
| 1836 | DEFSV = PL_reg_sv; |
| 1837 | } |
| 1838 | |
| 1839 | if (!(SvTYPE(PL_reg_sv) >= SVt_PVMG && SvMAGIC(PL_reg_sv) |
| 1840 | && (mg = mg_find(PL_reg_sv, PERL_MAGIC_regex_global)))) { |
| 1841 | /* prepare for quick setting of pos */ |
| 1842 | sv_magic(PL_reg_sv, (SV*)0, |
| 1843 | PERL_MAGIC_regex_global, Nullch, 0); |
| 1844 | mg = mg_find(PL_reg_sv, PERL_MAGIC_regex_global); |
| 1845 | mg->mg_len = -1; |
| 1846 | } |
| 1847 | PL_reg_magic = mg; |
| 1848 | PL_reg_oldpos = mg->mg_len; |
| 1849 | SAVEDESTRUCTOR_X(restore_pos, 0); |
| 1850 | } |
| 1851 | if (!PL_reg_curpm) |
| 1852 | Newz(22,PL_reg_curpm, 1, PMOP); |
| 1853 | PM_SETRE(PL_reg_curpm, prog); |
| 1854 | PL_reg_oldcurpm = PL_curpm; |
| 1855 | PL_curpm = PL_reg_curpm; |
| 1856 | if (RX_MATCH_COPIED(prog)) { |
| 1857 | /* Here is a serious problem: we cannot rewrite subbeg, |
| 1858 | since it may be needed if this match fails. Thus |
| 1859 | $` inside (?{}) could fail... */ |
| 1860 | PL_reg_oldsaved = prog->subbeg; |
| 1861 | PL_reg_oldsavedlen = prog->sublen; |
| 1862 | RX_MATCH_COPIED_off(prog); |
| 1863 | } |
| 1864 | else |
| 1865 | PL_reg_oldsaved = Nullch; |
| 1866 | prog->subbeg = PL_bostr; |
| 1867 | prog->sublen = PL_regeol - PL_bostr; /* strend may have been modified */ |
| 1868 | } |
| 1869 | prog->startp[0] = startpos - PL_bostr; |
| 1870 | PL_reginput = startpos; |
| 1871 | PL_regstartp = prog->startp; |
| 1872 | PL_regendp = prog->endp; |
| 1873 | PL_reglastparen = &prog->lastparen; |
| 1874 | prog->lastparen = 0; |
| 1875 | PL_regsize = 0; |
| 1876 | DEBUG_r(PL_reg_starttry = startpos); |
| 1877 | if (PL_reg_start_tmpl <= prog->nparens) { |
| 1878 | PL_reg_start_tmpl = prog->nparens*3/2 + 3; |
| 1879 | if(PL_reg_start_tmp) |
| 1880 | Renew(PL_reg_start_tmp, PL_reg_start_tmpl, char*); |
| 1881 | else |
| 1882 | New(22,PL_reg_start_tmp, PL_reg_start_tmpl, char*); |
| 1883 | } |
| 1884 | |
| 1885 | /* XXXX What this code is doing here?!!! There should be no need |
| 1886 | to do this again and again, PL_reglastparen should take care of |
| 1887 | this! --ilya*/ |
| 1888 | |
| 1889 | /* Tests pat.t#187 and split.t#{13,14} seem to depend on this code. |
| 1890 | * Actually, the code in regcppop() (which Ilya may be meaning by |
| 1891 | * PL_reglastparen), is not needed at all by the test suite |
| 1892 | * (op/regexp, op/pat, op/split), but that code is needed, oddly |
| 1893 | * enough, for building DynaLoader, or otherwise this |
| 1894 | * "Error: '*' not in typemap in DynaLoader.xs, line 164" |
| 1895 | * will happen. Meanwhile, this code *is* needed for the |
| 1896 | * above-mentioned test suite tests to succeed. The common theme |
| 1897 | * on those tests seems to be returning null fields from matches. |
| 1898 | * --jhi */ |
| 1899 | #if 1 |
| 1900 | sp = prog->startp; |
| 1901 | ep = prog->endp; |
| 1902 | if (prog->nparens) { |
| 1903 | for (i = prog->nparens; i > *PL_reglastparen; i--) { |
| 1904 | *++sp = -1; |
| 1905 | *++ep = -1; |
| 1906 | } |
| 1907 | } |
| 1908 | #endif |
| 1909 | REGCP_SET(lastcp); |
| 1910 | if (regmatch(prog->program + 1)) { |
| 1911 | prog->endp[0] = PL_reginput - PL_bostr; |
| 1912 | return 1; |
| 1913 | } |
| 1914 | REGCP_UNWIND(lastcp); |
| 1915 | return 0; |
| 1916 | } |
| 1917 | |
| 1918 | #define RE_UNWIND_BRANCH 1 |
| 1919 | #define RE_UNWIND_BRANCHJ 2 |
| 1920 | |
| 1921 | union re_unwind_t; |
| 1922 | |
| 1923 | typedef struct { /* XX: makes sense to enlarge it... */ |
| 1924 | I32 type; |
| 1925 | I32 prev; |
| 1926 | CHECKPOINT lastcp; |
| 1927 | } re_unwind_generic_t; |
| 1928 | |
| 1929 | typedef struct { |
| 1930 | I32 type; |
| 1931 | I32 prev; |
| 1932 | CHECKPOINT lastcp; |
| 1933 | I32 lastparen; |
| 1934 | regnode *next; |
| 1935 | char *locinput; |
| 1936 | I32 nextchr; |
| 1937 | #ifdef DEBUGGING |
| 1938 | int regindent; |
| 1939 | #endif |
| 1940 | } re_unwind_branch_t; |
| 1941 | |
| 1942 | typedef union re_unwind_t { |
| 1943 | I32 type; |
| 1944 | re_unwind_generic_t generic; |
| 1945 | re_unwind_branch_t branch; |
| 1946 | } re_unwind_t; |
| 1947 | |
| 1948 | /* |
| 1949 | - regmatch - main matching routine |
| 1950 | * |
| 1951 | * Conceptually the strategy is simple: check to see whether the current |
| 1952 | * node matches, call self recursively to see whether the rest matches, |
| 1953 | * and then act accordingly. In practice we make some effort to avoid |
| 1954 | * recursion, in particular by going through "ordinary" nodes (that don't |
| 1955 | * need to know whether the rest of the match failed) by a loop instead of |
| 1956 | * by recursion. |
| 1957 | */ |
| 1958 | /* [lwall] I've hoisted the register declarations to the outer block in order to |
| 1959 | * maybe save a little bit of pushing and popping on the stack. It also takes |
| 1960 | * advantage of machines that use a register save mask on subroutine entry. |
| 1961 | */ |
| 1962 | STATIC I32 /* 0 failure, 1 success */ |
| 1963 | S_regmatch(pTHX_ regnode *prog) |
| 1964 | { |
| 1965 | register regnode *scan; /* Current node. */ |
| 1966 | regnode *next; /* Next node. */ |
| 1967 | regnode *inner; /* Next node in internal branch. */ |
| 1968 | register I32 nextchr; /* renamed nextchr - nextchar colides with |
| 1969 | function of same name */ |
| 1970 | register I32 n; /* no or next */ |
| 1971 | register I32 ln = 0; /* len or last */ |
| 1972 | register char *s = Nullch; /* operand or save */ |
| 1973 | register char *locinput = PL_reginput; |
| 1974 | register I32 c1 = 0, c2 = 0, paren; /* case fold search, parenth */ |
| 1975 | int minmod = 0, sw = 0, logical = 0; |
| 1976 | I32 unwind = 0; |
| 1977 | #if 0 |
| 1978 | I32 firstcp = PL_savestack_ix; |
| 1979 | #endif |
| 1980 | register bool do_utf8 = DO_UTF8(PL_reg_sv); |
| 1981 | |
| 1982 | #ifdef DEBUGGING |
| 1983 | PL_regindent++; |
| 1984 | #endif |
| 1985 | |
| 1986 | /* Note that nextchr is a byte even in UTF */ |
| 1987 | nextchr = UCHARAT(locinput); |
| 1988 | scan = prog; |
| 1989 | while (scan != NULL) { |
| 1990 | #define sayNO_L (logical ? (logical = 0, sw = 0, goto cont) : sayNO) |
| 1991 | #if 1 |
| 1992 | # define sayYES goto yes |
| 1993 | # define sayNO goto no |
| 1994 | # define sayYES_FINAL goto yes_final |
| 1995 | # define sayYES_LOUD goto yes_loud |
| 1996 | # define sayNO_FINAL goto no_final |
| 1997 | # define sayNO_SILENT goto do_no |
| 1998 | # define saySAME(x) if (x) goto yes; else goto no |
| 1999 | # define REPORT_CODE_OFF 24 |
| 2000 | #else |
| 2001 | # define sayYES return 1 |
| 2002 | # define sayNO return 0 |
| 2003 | # define sayYES_FINAL return 1 |
| 2004 | # define sayYES_LOUD return 1 |
| 2005 | # define sayNO_FINAL return 0 |
| 2006 | # define sayNO_SILENT return 0 |
| 2007 | # define saySAME(x) return x |
| 2008 | #endif |
| 2009 | DEBUG_r( { |
| 2010 | SV *prop = sv_newmortal(); |
| 2011 | int docolor = *PL_colors[0]; |
| 2012 | int taill = (docolor ? 10 : 7); /* 3 chars for "> <" */ |
| 2013 | int l = (PL_regeol - locinput) > taill ? taill : (PL_regeol - locinput); |
| 2014 | /* The part of the string before starttry has one color |
| 2015 | (pref0_len chars), between starttry and current |
| 2016 | position another one (pref_len - pref0_len chars), |
| 2017 | after the current position the third one. |
| 2018 | We assume that pref0_len <= pref_len, otherwise we |
| 2019 | decrease pref0_len. */ |
| 2020 | int pref_len = (locinput - PL_bostr) > (5 + taill) - l |
| 2021 | ? (5 + taill) - l : locinput - PL_bostr; |
| 2022 | int pref0_len; |
| 2023 | |
| 2024 | while (UTF8_IS_CONTINUATION(*(U8*)(locinput - pref_len))) |
| 2025 | pref_len++; |
| 2026 | pref0_len = pref_len - (locinput - PL_reg_starttry); |
| 2027 | if (l + pref_len < (5 + taill) && l < PL_regeol - locinput) |
| 2028 | l = ( PL_regeol - locinput > (5 + taill) - pref_len |
| 2029 | ? (5 + taill) - pref_len : PL_regeol - locinput); |
| 2030 | while (UTF8_IS_CONTINUATION(*(U8*)(locinput + l))) |
| 2031 | l--; |
| 2032 | if (pref0_len < 0) |
| 2033 | pref0_len = 0; |
| 2034 | if (pref0_len > pref_len) |
| 2035 | pref0_len = pref_len; |
| 2036 | regprop(prop, scan); |
| 2037 | PerlIO_printf(Perl_debug_log, |
| 2038 | "%4"IVdf" <%s%.*s%s%s%.*s%s%s%s%.*s%s>%*s|%3"IVdf":%*s%s\n", |
| 2039 | (IV)(locinput - PL_bostr), |
| 2040 | PL_colors[4], pref0_len, |
| 2041 | locinput - pref_len, PL_colors[5], |
| 2042 | PL_colors[2], pref_len - pref0_len, |
| 2043 | locinput - pref_len + pref0_len, PL_colors[3], |
| 2044 | (docolor ? "" : "> <"), |
| 2045 | PL_colors[0], l, locinput, PL_colors[1], |
| 2046 | 15 - l - pref_len + 1, |
| 2047 | "", |
| 2048 | (IV)(scan - PL_regprogram), PL_regindent*2, "", |
| 2049 | SvPVX(prop)); |
| 2050 | } ); |
| 2051 | |
| 2052 | next = scan + NEXT_OFF(scan); |
| 2053 | if (next == scan) |
| 2054 | next = NULL; |
| 2055 | |
| 2056 | switch (OP(scan)) { |
| 2057 | case BOL: |
| 2058 | if (locinput == PL_bostr || (PL_multiline && |
| 2059 | (nextchr || locinput < PL_regeol) && locinput[-1] == '\n') ) |
| 2060 | { |
| 2061 | /* regtill = regbol; */ |
| 2062 | break; |
| 2063 | } |
| 2064 | sayNO; |
| 2065 | case MBOL: |
| 2066 | if (locinput == PL_bostr || |
| 2067 | ((nextchr || locinput < PL_regeol) && locinput[-1] == '\n')) |
| 2068 | { |
| 2069 | break; |
| 2070 | } |
| 2071 | sayNO; |
| 2072 | case SBOL: |
| 2073 | if (locinput == PL_bostr) |
| 2074 | break; |
| 2075 | sayNO; |
| 2076 | case GPOS: |
| 2077 | if (locinput == PL_reg_ganch) |
| 2078 | break; |
| 2079 | sayNO; |
| 2080 | case EOL: |
| 2081 | if (PL_multiline) |
| 2082 | goto meol; |
| 2083 | else |
| 2084 | goto seol; |
| 2085 | case MEOL: |
| 2086 | meol: |
| 2087 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') |
| 2088 | sayNO; |
| 2089 | break; |
| 2090 | case SEOL: |
| 2091 | seol: |
| 2092 | if ((nextchr || locinput < PL_regeol) && nextchr != '\n') |
| 2093 | sayNO; |
| 2094 | if (PL_regeol - locinput > 1) |
| 2095 | sayNO; |
| 2096 | break; |
| 2097 | case EOS: |
| 2098 | if (PL_regeol != locinput) |
| 2099 | sayNO; |
| 2100 | break; |
| 2101 | case SANY: |
| 2102 | if (!nextchr && locinput >= PL_regeol) |
| 2103 | sayNO; |
| 2104 | nextchr = UCHARAT(++locinput); |
| 2105 | break; |
| 2106 | case REG_ANY: |
| 2107 | if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n') |
| 2108 | sayNO; |
| 2109 | if (do_utf8) { |
| 2110 | locinput += PL_utf8skip[nextchr]; |
| 2111 | if (locinput > PL_regeol) |
| 2112 | sayNO; |
| 2113 | nextchr = UCHARAT(locinput); |
| 2114 | } |
| 2115 | else |
| 2116 | nextchr = UCHARAT(++locinput); |
| 2117 | break; |
| 2118 | case EXACT: |
| 2119 | s = STRING(scan); |
| 2120 | ln = STR_LEN(scan); |
| 2121 | if (do_utf8 != (UTF!=0)) { |
| 2122 | char *l = locinput; |
| 2123 | char *e = s + ln; |
| 2124 | STRLEN len; |
| 2125 | if (do_utf8) |
| 2126 | while (s < e) { |
| 2127 | if (l >= PL_regeol) |
| 2128 | sayNO; |
| 2129 | if (*((U8*)s) != utf8_to_uvchr((U8*)l, &len)) |
| 2130 | sayNO; |
| 2131 | s++; |
| 2132 | l += len; |
| 2133 | } |
| 2134 | else |
| 2135 | while (s < e) { |
| 2136 | if (l >= PL_regeol) |
| 2137 | sayNO; |
| 2138 | if (*((U8*)l) != utf8_to_uvchr((U8*)s, &len)) |
| 2139 | sayNO; |
| 2140 | s += len; |
| 2141 | l++; |
| 2142 | } |
| 2143 | locinput = l; |
| 2144 | nextchr = UCHARAT(locinput); |
| 2145 | break; |
| 2146 | } |
| 2147 | /* Inline the first character, for speed. */ |
| 2148 | if (UCHARAT(s) != nextchr) |
| 2149 | sayNO; |
| 2150 | if (PL_regeol - locinput < ln) |
| 2151 | sayNO; |
| 2152 | if (ln > 1 && memNE(s, locinput, ln)) |
| 2153 | sayNO; |
| 2154 | locinput += ln; |
| 2155 | nextchr = UCHARAT(locinput); |
| 2156 | break; |
| 2157 | case EXACTFL: |
| 2158 | PL_reg_flags |= RF_tainted; |
| 2159 | /* FALL THROUGH */ |
| 2160 | case EXACTF: |
| 2161 | s = STRING(scan); |
| 2162 | ln = STR_LEN(scan); |
| 2163 | |
| 2164 | if (do_utf8) { |
| 2165 | char *l = locinput; |
| 2166 | char *e; |
| 2167 | e = s + ln; |
| 2168 | c1 = OP(scan) == EXACTF; |
| 2169 | while (s < e) { |
| 2170 | if (l >= PL_regeol) { |
| 2171 | sayNO; |
| 2172 | } |
| 2173 | if ((UTF ? utf8n_to_uvchr((U8*)s, e - s, 0, 0) : *((U8*)s)) != |
| 2174 | (c1 ? toLOWER_utf8((U8*)l) : toLOWER_LC_utf8((U8*)l))) |
| 2175 | sayNO; |
| 2176 | s += UTF ? UTF8SKIP(s) : 1; |
| 2177 | l += UTF8SKIP(l); |
| 2178 | } |
| 2179 | locinput = l; |
| 2180 | nextchr = UCHARAT(locinput); |
| 2181 | break; |
| 2182 | } |
| 2183 | |
| 2184 | /* Inline the first character, for speed. */ |
| 2185 | if (UCHARAT(s) != nextchr && |
| 2186 | UCHARAT(s) != ((OP(scan) == EXACTF) |
| 2187 | ? PL_fold : PL_fold_locale)[nextchr]) |
| 2188 | sayNO; |
| 2189 | if (PL_regeol - locinput < ln) |
| 2190 | sayNO; |
| 2191 | if (ln > 1 && (OP(scan) == EXACTF |
| 2192 | ? ibcmp(s, locinput, ln) |
| 2193 | : ibcmp_locale(s, locinput, ln))) |
| 2194 | sayNO; |
| 2195 | locinput += ln; |
| 2196 | nextchr = UCHARAT(locinput); |
| 2197 | break; |
| 2198 | case ANYOF: |
| 2199 | if (do_utf8) { |
| 2200 | if (!reginclass(scan, (U8*)locinput, do_utf8)) |
| 2201 | sayNO; |
| 2202 | if (locinput >= PL_regeol) |
| 2203 | sayNO; |
| 2204 | locinput += PL_utf8skip[nextchr]; |
| 2205 | nextchr = UCHARAT(locinput); |
| 2206 | } |
| 2207 | else { |
| 2208 | if (nextchr < 0) |
| 2209 | nextchr = UCHARAT(locinput); |
| 2210 | if (!reginclass(scan, (U8*)locinput, do_utf8)) |
| 2211 | sayNO; |
| 2212 | if (!nextchr && locinput >= PL_regeol) |
| 2213 | sayNO; |
| 2214 | nextchr = UCHARAT(++locinput); |
| 2215 | } |
| 2216 | break; |
| 2217 | case ALNUML: |
| 2218 | PL_reg_flags |= RF_tainted; |
| 2219 | /* FALL THROUGH */ |
| 2220 | case ALNUM: |
| 2221 | if (!nextchr) |
| 2222 | sayNO; |
| 2223 | if (do_utf8) { |
| 2224 | LOAD_UTF8_CHARCLASS(alnum,"a"); |
| 2225 | if (!(OP(scan) == ALNUM |
| 2226 | ? swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8) |
| 2227 | : isALNUM_LC_utf8((U8*)locinput))) |
| 2228 | { |
| 2229 | sayNO; |
| 2230 | } |
| 2231 | locinput += PL_utf8skip[nextchr]; |
| 2232 | nextchr = UCHARAT(locinput); |
| 2233 | break; |
| 2234 | } |
| 2235 | if (!(OP(scan) == ALNUM |
| 2236 | ? isALNUM(nextchr) : isALNUM_LC(nextchr))) |
| 2237 | sayNO; |
| 2238 | nextchr = UCHARAT(++locinput); |
| 2239 | break; |
| 2240 | case NALNUML: |
| 2241 | PL_reg_flags |= RF_tainted; |
| 2242 | /* FALL THROUGH */ |
| 2243 | case NALNUM: |
| 2244 | if (!nextchr && locinput >= PL_regeol) |
| 2245 | sayNO; |
| 2246 | if (do_utf8) { |
| 2247 | LOAD_UTF8_CHARCLASS(alnum,"a"); |
| 2248 | if (OP(scan) == NALNUM |
| 2249 | ? swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8) |
| 2250 | : isALNUM_LC_utf8((U8*)locinput)) |
| 2251 | { |
| 2252 | sayNO; |
| 2253 | } |
| 2254 | locinput += PL_utf8skip[nextchr]; |
| 2255 | nextchr = UCHARAT(locinput); |
| 2256 | break; |
| 2257 | } |
| 2258 | if (OP(scan) == NALNUM |
| 2259 | ? isALNUM(nextchr) : isALNUM_LC(nextchr)) |
| 2260 | sayNO; |
| 2261 | nextchr = UCHARAT(++locinput); |
| 2262 | break; |
| 2263 | case BOUNDL: |
| 2264 | case NBOUNDL: |
| 2265 | PL_reg_flags |= RF_tainted; |
| 2266 | /* FALL THROUGH */ |
| 2267 | case BOUND: |
| 2268 | case NBOUND: |
| 2269 | /* was last char in word? */ |
| 2270 | if (do_utf8) { |
| 2271 | if (locinput == PL_bostr) |
| 2272 | ln = '\n'; |
| 2273 | else { |
| 2274 | U8 *r = reghop((U8*)locinput, -1); |
| 2275 | |
| 2276 | ln = utf8n_to_uvchr(r, s - (char*)r, 0, 0); |
| 2277 | } |
| 2278 | if (OP(scan) == BOUND || OP(scan) == NBOUND) { |
| 2279 | ln = isALNUM_uni(ln); |
| 2280 | LOAD_UTF8_CHARCLASS(alnum,"a"); |
| 2281 | n = swash_fetch(PL_utf8_alnum, (U8*)locinput, do_utf8); |
| 2282 | } |
| 2283 | else { |
| 2284 | ln = isALNUM_LC_uvchr(UNI_TO_NATIVE(ln)); |
| 2285 | n = isALNUM_LC_utf8((U8*)locinput); |
| 2286 | } |
| 2287 | } |
| 2288 | else { |
| 2289 | ln = (locinput != PL_bostr) ? |
| 2290 | UCHARAT(locinput - 1) : '\n'; |
| 2291 | if (OP(scan) == BOUND || OP(scan) == NBOUND) { |
| 2292 | ln = isALNUM(ln); |
| 2293 | n = isALNUM(nextchr); |
| 2294 | } |
| 2295 | else { |
| 2296 | ln = isALNUM_LC(ln); |
| 2297 | n = isALNUM_LC(nextchr); |
| 2298 | } |
| 2299 | } |
| 2300 | if (((!ln) == (!n)) == (OP(scan) == BOUND || |
| 2301 | OP(scan) == BOUNDL)) |
| 2302 | sayNO; |
| 2303 | break; |
| 2304 | case SPACEL: |
| 2305 | PL_reg_flags |= RF_tainted; |
| 2306 | /* FALL THROUGH */ |
| 2307 | case SPACE: |
| 2308 | if (!nextchr) |
| 2309 | sayNO; |
| 2310 | if (do_utf8) { |
| 2311 | if (UTF8_IS_CONTINUED(nextchr)) { |
| 2312 | LOAD_UTF8_CHARCLASS(space," "); |
| 2313 | if (!(OP(scan) == SPACE |
| 2314 | ? swash_fetch(PL_utf8_space, (U8*)locinput, do_utf8) |
| 2315 | : isSPACE_LC_utf8((U8*)locinput))) |
| 2316 | { |
| 2317 | sayNO; |
| 2318 | } |
| 2319 | locinput += PL_utf8skip[nextchr]; |
| 2320 | nextchr = UCHARAT(locinput); |
| 2321 | break; |
| 2322 | } |
| 2323 | if (!(OP(scan) == SPACE |
| 2324 | ? isSPACE(nextchr) : isSPACE_LC(nextchr))) |
| 2325 | sayNO; |
| 2326 | nextchr = UCHARAT(++locinput); |
| 2327 | } |
| 2328 | else { |
| 2329 | if (!(OP(scan) == SPACE |
| 2330 | ? isSPACE(nextchr) : isSPACE_LC(nextchr))) |
| 2331 | sayNO; |
| 2332 | nextchr = UCHARAT(++locinput); |
| 2333 | } |
| 2334 | break; |
| 2335 | case NSPACEL: |
| 2336 | PL_reg_flags |= RF_tainted; |
| 2337 | /* FALL THROUGH */ |
| 2338 | case NSPACE: |
| 2339 | if (!nextchr && locinput >= PL_regeol) |
| 2340 | sayNO; |
| 2341 | if (do_utf8) { |
| 2342 | LOAD_UTF8_CHARCLASS(space," "); |
| 2343 | if (OP(scan) == NSPACE |
| 2344 | ? swash_fetch(PL_utf8_space, (U8*)locinput, do_utf8) |
| 2345 | : isSPACE_LC_utf8((U8*)locinput)) |
| 2346 | { |
| 2347 | sayNO; |
| 2348 | } |
| 2349 | locinput += PL_utf8skip[nextchr]; |
| 2350 | nextchr = UCHARAT(locinput); |
| 2351 | break; |
| 2352 | } |
| 2353 | if (OP(scan) == NSPACE |
| 2354 | ? isSPACE(nextchr) : isSPACE_LC(nextchr)) |
| 2355 | sayNO; |
| 2356 | nextchr = UCHARAT(++locinput); |
| 2357 | break; |
| 2358 | case DIGITL: |
| 2359 | PL_reg_flags |= RF_tainted; |
| 2360 | /* FALL THROUGH */ |
| 2361 | case DIGIT: |
| 2362 | if (!nextchr) |
| 2363 | sayNO; |
| 2364 | if (do_utf8) { |
| 2365 | LOAD_UTF8_CHARCLASS(digit,"0"); |
| 2366 | if (!(OP(scan) == DIGIT |
| 2367 | ? swash_fetch(PL_utf8_digit, (U8*)locinput, do_utf8) |
| 2368 | : isDIGIT_LC_utf8((U8*)locinput))) |
| 2369 | { |
| 2370 | sayNO; |
| 2371 | } |
| 2372 | locinput += PL_utf8skip[nextchr]; |
| 2373 | nextchr = UCHARAT(locinput); |
| 2374 | break; |
| 2375 | } |
| 2376 | if (!(OP(scan) == DIGIT |
| 2377 | ? isDIGIT(nextchr) : isDIGIT_LC(nextchr))) |
| 2378 | sayNO; |
| 2379 | nextchr = UCHARAT(++locinput); |
| 2380 | break; |
| 2381 | case NDIGITL: |
| 2382 | PL_reg_flags |= RF_tainted; |
| 2383 | /* FALL THROUGH */ |
| 2384 | case NDIGIT: |
| 2385 | if (!nextchr && locinput >= PL_regeol) |
| 2386 | sayNO; |
| 2387 | if (do_utf8) { |
| 2388 | LOAD_UTF8_CHARCLASS(digit,"0"); |
| 2389 | if (OP(scan) == NDIGIT |
| 2390 | ? swash_fetch(PL_utf8_digit, (U8*)locinput, do_utf8) |
| 2391 | : isDIGIT_LC_utf8((U8*)locinput)) |
| 2392 | { |
| 2393 | sayNO; |
| 2394 | } |
| 2395 | locinput += PL_utf8skip[nextchr]; |
| 2396 | nextchr = UCHARAT(locinput); |
| 2397 | break; |
| 2398 | } |
| 2399 | if (OP(scan) == NDIGIT |
| 2400 | ? isDIGIT(nextchr) : isDIGIT_LC(nextchr)) |
| 2401 | sayNO; |
| 2402 | nextchr = UCHARAT(++locinput); |
| 2403 | break; |
| 2404 | case CLUMP: |
| 2405 | LOAD_UTF8_CHARCLASS(mark,"~"); |
| 2406 | if (locinput >= PL_regeol || |
| 2407 | swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8)) |
| 2408 | sayNO; |
| 2409 | locinput += PL_utf8skip[nextchr]; |
| 2410 | while (locinput < PL_regeol && |
| 2411 | swash_fetch(PL_utf8_mark,(U8*)locinput, do_utf8)) |
| 2412 | locinput += UTF8SKIP(locinput); |
| 2413 | if (locinput > PL_regeol) |
| 2414 | sayNO; |
| 2415 | nextchr = UCHARAT(locinput); |
| 2416 | break; |
| 2417 | case REFFL: |
| 2418 | PL_reg_flags |= RF_tainted; |
| 2419 | /* FALL THROUGH */ |
| 2420 | case REF: |
| 2421 | case REFF: |
| 2422 | n = ARG(scan); /* which paren pair */ |
| 2423 | ln = PL_regstartp[n]; |
| 2424 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
| 2425 | if (*PL_reglastparen < n || ln == -1) |
| 2426 | sayNO; /* Do not match unless seen CLOSEn. */ |
| 2427 | if (ln == PL_regendp[n]) |
| 2428 | break; |
| 2429 | |
| 2430 | s = PL_bostr + ln; |
| 2431 | if (do_utf8 && OP(scan) != REF) { /* REF can do byte comparison */ |
| 2432 | char *l = locinput; |
| 2433 | char *e = PL_bostr + PL_regendp[n]; |
| 2434 | /* |
| 2435 | * Note that we can't do the "other character" lookup trick as |
| 2436 | * in the 8-bit case (no pun intended) because in Unicode we |
| 2437 | * have to map both upper and title case to lower case. |
| 2438 | */ |
| 2439 | if (OP(scan) == REFF) { |
| 2440 | while (s < e) { |
| 2441 | if (l >= PL_regeol) |
| 2442 | sayNO; |
| 2443 | if (toLOWER_utf8((U8*)s) != toLOWER_utf8((U8*)l)) |
| 2444 | sayNO; |
| 2445 | s += UTF8SKIP(s); |
| 2446 | l += UTF8SKIP(l); |
| 2447 | } |
| 2448 | } |
| 2449 | else { |
| 2450 | while (s < e) { |
| 2451 | if (l >= PL_regeol) |
| 2452 | sayNO; |
| 2453 | if (toLOWER_LC_utf8((U8*)s) != toLOWER_LC_utf8((U8*)l)) |
| 2454 | sayNO; |
| 2455 | s += UTF8SKIP(s); |
| 2456 | l += UTF8SKIP(l); |
| 2457 | } |
| 2458 | } |
| 2459 | locinput = l; |
| 2460 | nextchr = UCHARAT(locinput); |
| 2461 | break; |
| 2462 | } |
| 2463 | |
| 2464 | /* Inline the first character, for speed. */ |
| 2465 | if (UCHARAT(s) != nextchr && |
| 2466 | (OP(scan) == REF || |
| 2467 | (UCHARAT(s) != ((OP(scan) == REFF |
| 2468 | ? PL_fold : PL_fold_locale)[nextchr])))) |
| 2469 | sayNO; |
| 2470 | ln = PL_regendp[n] - ln; |
| 2471 | if (locinput + ln > PL_regeol) |
| 2472 | sayNO; |
| 2473 | if (ln > 1 && (OP(scan) == REF |
| 2474 | ? memNE(s, locinput, ln) |
| 2475 | : (OP(scan) == REFF |
| 2476 | ? ibcmp(s, locinput, ln) |
| 2477 | : ibcmp_locale(s, locinput, ln)))) |
| 2478 | sayNO; |
| 2479 | locinput += ln; |
| 2480 | nextchr = UCHARAT(locinput); |
| 2481 | break; |
| 2482 | |
| 2483 | case NOTHING: |
| 2484 | case TAIL: |
| 2485 | break; |
| 2486 | case BACK: |
| 2487 | break; |
| 2488 | case EVAL: |
| 2489 | { |
| 2490 | dSP; |
| 2491 | OP_4tree *oop = PL_op; |
| 2492 | COP *ocurcop = PL_curcop; |
| 2493 | SV **ocurpad = PL_curpad; |
| 2494 | SV *ret; |
| 2495 | |
| 2496 | n = ARG(scan); |
| 2497 | PL_op = (OP_4tree*)PL_regdata->data[n]; |
| 2498 | DEBUG_r( PerlIO_printf(Perl_debug_log, " re_eval 0x%"UVxf"\n", PTR2UV(PL_op)) ); |
| 2499 | PL_curpad = AvARRAY((AV*)PL_regdata->data[n + 2]); |
| 2500 | PL_regendp[0] = PL_reg_magic->mg_len = locinput - PL_bostr; |
| 2501 | |
| 2502 | CALLRUNOPS(aTHX); /* Scalar context. */ |
| 2503 | SPAGAIN; |
| 2504 | ret = POPs; |
| 2505 | PUTBACK; |
| 2506 | |
| 2507 | PL_op = oop; |
| 2508 | PL_curpad = ocurpad; |
| 2509 | PL_curcop = ocurcop; |
| 2510 | if (logical) { |
| 2511 | if (logical == 2) { /* Postponed subexpression. */ |
| 2512 | regexp *re; |
| 2513 | MAGIC *mg = Null(MAGIC*); |
| 2514 | re_cc_state state; |
| 2515 | CHECKPOINT cp, lastcp; |
| 2516 | |
| 2517 | if(SvROK(ret) || SvRMAGICAL(ret)) { |
| 2518 | SV *sv = SvROK(ret) ? SvRV(ret) : ret; |
| 2519 | |
| 2520 | if(SvMAGICAL(sv)) |
| 2521 | mg = mg_find(sv, PERL_MAGIC_qr); |
| 2522 | } |
| 2523 | if (mg) { |
| 2524 | re = (regexp *)mg->mg_obj; |
| 2525 | (void)ReREFCNT_inc(re); |
| 2526 | } |
| 2527 | else { |
| 2528 | STRLEN len; |
| 2529 | char *t = SvPV(ret, len); |
| 2530 | PMOP pm; |
| 2531 | char *oprecomp = PL_regprecomp; |
| 2532 | I32 osize = PL_regsize; |
| 2533 | I32 onpar = PL_regnpar; |
| 2534 | |
| 2535 | Zero(&pm, 1, PMOP); |
| 2536 | re = CALLREGCOMP(aTHX_ t, t + len, &pm); |
| 2537 | if (!(SvFLAGS(ret) |
| 2538 | & (SVs_TEMP | SVs_PADTMP | SVf_READONLY))) |
| 2539 | sv_magic(ret,(SV*)ReREFCNT_inc(re), |
| 2540 | PERL_MAGIC_qr,0,0); |
| 2541 | PL_regprecomp = oprecomp; |
| 2542 | PL_regsize = osize; |
| 2543 | PL_regnpar = onpar; |
| 2544 | } |
| 2545 | DEBUG_r( |
| 2546 | PerlIO_printf(Perl_debug_log, |
| 2547 | "Entering embedded `%s%.60s%s%s'\n", |
| 2548 | PL_colors[0], |
| 2549 | re->precomp, |
| 2550 | PL_colors[1], |
| 2551 | (strlen(re->precomp) > 60 ? "..." : "")) |
| 2552 | ); |
| 2553 | state.node = next; |
| 2554 | state.prev = PL_reg_call_cc; |
| 2555 | state.cc = PL_regcc; |
| 2556 | state.re = PL_reg_re; |
| 2557 | |
| 2558 | PL_regcc = 0; |
| 2559 | |
| 2560 | cp = regcppush(0); /* Save *all* the positions. */ |
| 2561 | REGCP_SET(lastcp); |
| 2562 | cache_re(re); |
| 2563 | state.ss = PL_savestack_ix; |
| 2564 | *PL_reglastparen = 0; |
| 2565 | PL_reg_call_cc = &state; |
| 2566 | PL_reginput = locinput; |
| 2567 | |
| 2568 | /* XXXX This is too dramatic a measure... */ |
| 2569 | PL_reg_maxiter = 0; |
| 2570 | |
| 2571 | if (regmatch(re->program + 1)) { |
| 2572 | /* Even though we succeeded, we need to restore |
| 2573 | global variables, since we may be wrapped inside |
| 2574 | SUSPEND, thus the match may be not finished yet. */ |
| 2575 | |
| 2576 | /* XXXX Do this only if SUSPENDed? */ |
| 2577 | PL_reg_call_cc = state.prev; |
| 2578 | PL_regcc = state.cc; |
| 2579 | PL_reg_re = state.re; |
| 2580 | cache_re(PL_reg_re); |
| 2581 | |
| 2582 | /* XXXX This is too dramatic a measure... */ |
| 2583 | PL_reg_maxiter = 0; |
| 2584 | |
| 2585 | /* These are needed even if not SUSPEND. */ |
| 2586 | ReREFCNT_dec(re); |
| 2587 | regcpblow(cp); |
| 2588 | sayYES; |
| 2589 | } |
| 2590 | ReREFCNT_dec(re); |
| 2591 | REGCP_UNWIND(lastcp); |
| 2592 | regcppop(); |
| 2593 | PL_reg_call_cc = state.prev; |
| 2594 | PL_regcc = state.cc; |
| 2595 | PL_reg_re = state.re; |
| 2596 | cache_re(PL_reg_re); |
| 2597 | |
| 2598 | /* XXXX This is too dramatic a measure... */ |
| 2599 | PL_reg_maxiter = 0; |
| 2600 | |
| 2601 | sayNO; |
| 2602 | } |
| 2603 | sw = SvTRUE(ret); |
| 2604 | logical = 0; |
| 2605 | } |
| 2606 | else |
| 2607 | sv_setsv(save_scalar(PL_replgv), ret); |
| 2608 | break; |
| 2609 | } |
| 2610 | case OPEN: |
| 2611 | n = ARG(scan); /* which paren pair */ |
| 2612 | PL_reg_start_tmp[n] = locinput; |
| 2613 | if (n > PL_regsize) |
| 2614 | PL_regsize = n; |
| 2615 | break; |
| 2616 | case CLOSE: |
| 2617 | n = ARG(scan); /* which paren pair */ |
| 2618 | PL_regstartp[n] = PL_reg_start_tmp[n] - PL_bostr; |
| 2619 | PL_regendp[n] = locinput - PL_bostr; |
| 2620 | if (n > *PL_reglastparen) |
| 2621 | *PL_reglastparen = n; |
| 2622 | break; |
| 2623 | case GROUPP: |
| 2624 | n = ARG(scan); /* which paren pair */ |
| 2625 | sw = (*PL_reglastparen >= n && PL_regendp[n] != -1); |
| 2626 | break; |
| 2627 | case IFTHEN: |
| 2628 | PL_reg_leftiter = PL_reg_maxiter; /* Void cache */ |
| 2629 | if (sw) |
| 2630 | next = NEXTOPER(NEXTOPER(scan)); |
| 2631 | else { |
| 2632 | next = scan + ARG(scan); |
| 2633 | if (OP(next) == IFTHEN) /* Fake one. */ |
| 2634 | next = NEXTOPER(NEXTOPER(next)); |
| 2635 | } |
| 2636 | break; |
| 2637 | case LOGICAL: |
| 2638 | logical = scan->flags; |
| 2639 | break; |
| 2640 | /******************************************************************* |
| 2641 | PL_regcc contains infoblock about the innermost (...)* loop, and |
| 2642 | a pointer to the next outer infoblock. |
| 2643 | |
| 2644 | Here is how Y(A)*Z is processed (if it is compiled into CURLYX/WHILEM): |
| 2645 | |
| 2646 | 1) After matching X, regnode for CURLYX is processed; |
| 2647 | |
| 2648 | 2) This regnode creates infoblock on the stack, and calls |
| 2649 | regmatch() recursively with the starting point at WHILEM node; |
| 2650 | |
| 2651 | 3) Each hit of WHILEM node tries to match A and Z (in the order |
| 2652 | depending on the current iteration, min/max of {min,max} and |
| 2653 | greediness). The information about where are nodes for "A" |
| 2654 | and "Z" is read from the infoblock, as is info on how many times "A" |
| 2655 | was already matched, and greediness. |
| 2656 | |
| 2657 | 4) After A matches, the same WHILEM node is hit again. |
| 2658 | |
| 2659 | 5) Each time WHILEM is hit, PL_regcc is the infoblock created by CURLYX |
| 2660 | of the same pair. Thus when WHILEM tries to match Z, it temporarily |
| 2661 | resets PL_regcc, since this Y(A)*Z can be a part of some other loop: |
| 2662 | as in (Y(A)*Z)*. If Z matches, the automaton will hit the WHILEM node |
| 2663 | of the external loop. |
| 2664 | |
| 2665 | Currently present infoblocks form a tree with a stem formed by PL_curcc |
| 2666 | and whatever it mentions via ->next, and additional attached trees |
| 2667 | corresponding to temporarily unset infoblocks as in "5" above. |
| 2668 | |
| 2669 | In the following picture infoblocks for outer loop of |
| 2670 | (Y(A)*?Z)*?T are denoted O, for inner I. NULL starting block |
| 2671 | is denoted by x. The matched string is YAAZYAZT. Temporarily postponed |
| 2672 | infoblocks are drawn below the "reset" infoblock. |
| 2673 | |
| 2674 | In fact in the picture below we do not show failed matches for Z and T |
| 2675 | by WHILEM blocks. [We illustrate minimal matches, since for them it is |
| 2676 | more obvious *why* one needs to *temporary* unset infoblocks.] |
| 2677 | |
| 2678 | Matched REx position InfoBlocks Comment |
| 2679 | (Y(A)*?Z)*?T x |
| 2680 | Y(A)*?Z)*?T x <- O |
| 2681 | Y (A)*?Z)*?T x <- O |
| 2682 | Y A)*?Z)*?T x <- O <- I |
| 2683 | YA )*?Z)*?T x <- O <- I |
| 2684 | YA A)*?Z)*?T x <- O <- I |
| 2685 | YAA )*?Z)*?T x <- O <- I |
| 2686 | YAA Z)*?T x <- O # Temporary unset I |
| 2687 | I |
| 2688 | |
| 2689 | YAAZ Y(A)*?Z)*?T x <- O |
| 2690 | I |
| 2691 | |
| 2692 | YAAZY (A)*?Z)*?T x <- O |
| 2693 | I |
| 2694 | |
| 2695 | YAAZY A)*?Z)*?T x <- O <- I |
| 2696 | I |
| 2697 | |
| 2698 | YAAZYA )*?Z)*?T x <- O <- I |
| 2699 | I |
| 2700 | |
| 2701 | YAAZYA Z)*?T x <- O # Temporary unset I |
| 2702 | I,I |
| 2703 | |
| 2704 | YAAZYAZ )*?T x <- O |
| 2705 | I,I |
| 2706 | |
| 2707 | YAAZYAZ T x # Temporary unset O |
| 2708 | O |
| 2709 | I,I |
| 2710 | |
| 2711 | YAAZYAZT x |
| 2712 | O |
| 2713 | I,I |
| 2714 | *******************************************************************/ |
| 2715 | case CURLYX: { |
| 2716 | CURCUR cc; |
| 2717 | CHECKPOINT cp = PL_savestack_ix; |
| 2718 | /* No need to save/restore up to this paren */ |
| 2719 | I32 parenfloor = scan->flags; |
| 2720 | |
| 2721 | if (OP(PREVOPER(next)) == NOTHING) /* LONGJMP */ |
| 2722 | next += ARG(next); |
| 2723 | cc.oldcc = PL_regcc; |
| 2724 | PL_regcc = &cc; |
| 2725 | /* XXXX Probably it is better to teach regpush to support |
| 2726 | parenfloor > PL_regsize... */ |
| 2727 | if (parenfloor > *PL_reglastparen) |
| 2728 | parenfloor = *PL_reglastparen; /* Pessimization... */ |
| 2729 | cc.parenfloor = parenfloor; |
| 2730 | cc.cur = -1; |
| 2731 | cc.min = ARG1(scan); |
| 2732 | cc.max = ARG2(scan); |
| 2733 | cc.scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS; |
| 2734 | cc.next = next; |
| 2735 | cc.minmod = minmod; |
| 2736 | cc.lastloc = 0; |
| 2737 | PL_reginput = locinput; |
| 2738 | n = regmatch(PREVOPER(next)); /* start on the WHILEM */ |
| 2739 | regcpblow(cp); |
| 2740 | PL_regcc = cc.oldcc; |
| 2741 | saySAME(n); |
| 2742 | } |
| 2743 | /* NOT REACHED */ |
| 2744 | case WHILEM: { |
| 2745 | /* |
| 2746 | * This is really hard to understand, because after we match |
| 2747 | * what we're trying to match, we must make sure the rest of |
| 2748 | * the REx is going to match for sure, and to do that we have |
| 2749 | * to go back UP the parse tree by recursing ever deeper. And |
| 2750 | * if it fails, we have to reset our parent's current state |
| 2751 | * that we can try again after backing off. |
| 2752 | */ |
| 2753 | |
| 2754 | CHECKPOINT cp, lastcp; |
| 2755 | CURCUR* cc = PL_regcc; |
| 2756 | char *lastloc = cc->lastloc; /* Detection of 0-len. */ |
| 2757 | |
| 2758 | n = cc->cur + 1; /* how many we know we matched */ |
| 2759 | PL_reginput = locinput; |
| 2760 | |
| 2761 | DEBUG_r( |
| 2762 | PerlIO_printf(Perl_debug_log, |
| 2763 | "%*s %ld out of %ld..%ld cc=%lx\n", |
| 2764 | REPORT_CODE_OFF+PL_regindent*2, "", |
| 2765 | (long)n, (long)cc->min, |
| 2766 | (long)cc->max, (long)cc) |
| 2767 | ); |
| 2768 | |
| 2769 | /* If degenerate scan matches "", assume scan done. */ |
| 2770 | |
| 2771 | if (locinput == cc->lastloc && n >= cc->min) { |
| 2772 | PL_regcc = cc->oldcc; |
| 2773 | if (PL_regcc) |
| 2774 | ln = PL_regcc->cur; |
| 2775 | DEBUG_r( |
| 2776 | PerlIO_printf(Perl_debug_log, |
| 2777 | "%*s empty match detected, try continuation...\n", |
| 2778 | REPORT_CODE_OFF+PL_regindent*2, "") |
| 2779 | ); |
| 2780 | if (regmatch(cc->next)) |
| 2781 | sayYES; |
| 2782 | if (PL_regcc) |
| 2783 | PL_regcc->cur = ln; |
| 2784 | PL_regcc = cc; |
| 2785 | sayNO; |
| 2786 | } |
| 2787 | |
| 2788 | /* First just match a string of min scans. */ |
| 2789 | |
| 2790 | if (n < cc->min) { |
| 2791 | cc->cur = n; |
| 2792 | cc->lastloc = locinput; |
| 2793 | if (regmatch(cc->scan)) |
| 2794 | sayYES; |
| 2795 | cc->cur = n - 1; |
| 2796 | cc->lastloc = lastloc; |
| 2797 | sayNO; |
| 2798 | } |
| 2799 | |
| 2800 | if (scan->flags) { |
| 2801 | /* Check whether we already were at this position. |
| 2802 | Postpone detection until we know the match is not |
| 2803 | *that* much linear. */ |
| 2804 | if (!PL_reg_maxiter) { |
| 2805 | PL_reg_maxiter = (PL_regeol - PL_bostr + 1) * (scan->flags>>4); |
| 2806 | PL_reg_leftiter = PL_reg_maxiter; |
| 2807 | } |
| 2808 | if (PL_reg_leftiter-- == 0) { |
| 2809 | I32 size = (PL_reg_maxiter + 7)/8; |
| 2810 | if (PL_reg_poscache) { |
| 2811 | if (PL_reg_poscache_size < size) { |
| 2812 | Renew(PL_reg_poscache, size, char); |
| 2813 | PL_reg_poscache_size = size; |
| 2814 | } |
| 2815 | Zero(PL_reg_poscache, size, char); |
| 2816 | } |
| 2817 | else { |
| 2818 | PL_reg_poscache_size = size; |
| 2819 | Newz(29, PL_reg_poscache, size, char); |
| 2820 | } |
| 2821 | DEBUG_r( |
| 2822 | PerlIO_printf(Perl_debug_log, |
| 2823 | "%sDetected a super-linear match, switching on caching%s...\n", |
| 2824 | PL_colors[4], PL_colors[5]) |
| 2825 | ); |
| 2826 | } |
| 2827 | if (PL_reg_leftiter < 0) { |
| 2828 | I32 o = locinput - PL_bostr, b; |
| 2829 | |
| 2830 | o = (scan->flags & 0xf) - 1 + o * (scan->flags>>4); |
| 2831 | b = o % 8; |
| 2832 | o /= 8; |
| 2833 | if (PL_reg_poscache[o] & (1<<b)) { |
| 2834 | DEBUG_r( |
| 2835 | PerlIO_printf(Perl_debug_log, |
| 2836 | "%*s already tried at this position...\n", |
| 2837 | REPORT_CODE_OFF+PL_regindent*2, "") |
| 2838 | ); |
| 2839 | sayNO_SILENT; |
| 2840 | } |
| 2841 | PL_reg_poscache[o] |= (1<<b); |
| 2842 | } |
| 2843 | } |
| 2844 | |
| 2845 | /* Prefer next over scan for minimal matching. */ |
| 2846 | |
| 2847 | if (cc->minmod) { |
| 2848 | PL_regcc = cc->oldcc; |
| 2849 | if (PL_regcc) |
| 2850 | ln = PL_regcc->cur; |
| 2851 | cp = regcppush(cc->parenfloor); |
| 2852 | REGCP_SET(lastcp); |
| 2853 | if (regmatch(cc->next)) { |
| 2854 | regcpblow(cp); |
| 2855 | sayYES; /* All done. */ |
| 2856 | } |
| 2857 | REGCP_UNWIND(lastcp); |
| 2858 | regcppop(); |
| 2859 | if (PL_regcc) |
| 2860 | PL_regcc->cur = ln; |
| 2861 | PL_regcc = cc; |
| 2862 | |
| 2863 | if (n >= cc->max) { /* Maximum greed exceeded? */ |
| 2864 | if (ckWARN(WARN_REGEXP) && n >= REG_INFTY |
| 2865 | && !(PL_reg_flags & RF_warned)) { |
| 2866 | PL_reg_flags |= RF_warned; |
| 2867 | Perl_warner(aTHX_ WARN_REGEXP, "%s limit (%d) exceeded", |
| 2868 | "Complex regular subexpression recursion", |
| 2869 | REG_INFTY - 1); |
| 2870 | } |
| 2871 | sayNO; |
| 2872 | } |
| 2873 | |
| 2874 | DEBUG_r( |
| 2875 | PerlIO_printf(Perl_debug_log, |
| 2876 | "%*s trying longer...\n", |
| 2877 | REPORT_CODE_OFF+PL_regindent*2, "") |
| 2878 | ); |
| 2879 | /* Try scanning more and see if it helps. */ |
| 2880 | PL_reginput = locinput; |
| 2881 | cc->cur = n; |
| 2882 | cc->lastloc = locinput; |
| 2883 | cp = regcppush(cc->parenfloor); |
| 2884 | REGCP_SET(lastcp); |
| 2885 | if (regmatch(cc->scan)) { |
| 2886 | regcpblow(cp); |
| 2887 | sayYES; |
| 2888 | } |
| 2889 | REGCP_UNWIND(lastcp); |
| 2890 | regcppop(); |
| 2891 | cc->cur = n - 1; |
| 2892 | cc->lastloc = lastloc; |
| 2893 | sayNO; |
| 2894 | } |
| 2895 | |
| 2896 | /* Prefer scan over next for maximal matching. */ |
| 2897 | |
| 2898 | if (n < cc->max) { /* More greed allowed? */ |
| 2899 | cp = regcppush(cc->parenfloor); |
| 2900 | cc->cur = n; |
| 2901 | cc->lastloc = locinput; |
| 2902 | REGCP_SET(lastcp); |
| 2903 | if (regmatch(cc->scan)) { |
| 2904 | regcpblow(cp); |
| 2905 | sayYES; |
| 2906 | } |
| 2907 | REGCP_UNWIND(lastcp); |
| 2908 | regcppop(); /* Restore some previous $<digit>s? */ |
| 2909 | PL_reginput = locinput; |
| 2910 | DEBUG_r( |
| 2911 | PerlIO_printf(Perl_debug_log, |
| 2912 | "%*s failed, try continuation...\n", |
| 2913 | REPORT_CODE_OFF+PL_regindent*2, "") |
| 2914 | ); |
| 2915 | } |
| 2916 | if (ckWARN(WARN_REGEXP) && n >= REG_INFTY |
| 2917 | && !(PL_reg_flags & RF_warned)) { |
| 2918 | PL_reg_flags |= RF_warned; |
| 2919 | Perl_warner(aTHX_ WARN_REGEXP, "%s limit (%d) exceeded", |
| 2920 | "Complex regular subexpression recursion", |
| 2921 | REG_INFTY - 1); |
| 2922 | } |
| 2923 | |
| 2924 | /* Failed deeper matches of scan, so see if this one works. */ |
| 2925 | PL_regcc = cc->oldcc; |
| 2926 | if (PL_regcc) |
| 2927 | ln = PL_regcc->cur; |
| 2928 | if (regmatch(cc->next)) |
| 2929 | sayYES; |
| 2930 | if (PL_regcc) |
| 2931 | PL_regcc->cur = ln; |
| 2932 | PL_regcc = cc; |
| 2933 | cc->cur = n - 1; |
| 2934 | cc->lastloc = lastloc; |
| 2935 | sayNO; |
| 2936 | } |
| 2937 | /* NOT REACHED */ |
| 2938 | case BRANCHJ: |
| 2939 | next = scan + ARG(scan); |
| 2940 | if (next == scan) |
| 2941 | next = NULL; |
| 2942 | inner = NEXTOPER(NEXTOPER(scan)); |
| 2943 | goto do_branch; |
| 2944 | case BRANCH: |
| 2945 | inner = NEXTOPER(scan); |
| 2946 | do_branch: |
| 2947 | { |
| 2948 | c1 = OP(scan); |
| 2949 | if (OP(next) != c1) /* No choice. */ |
| 2950 | next = inner; /* Avoid recursion. */ |
| 2951 | else { |
| 2952 | I32 lastparen = *PL_reglastparen; |
| 2953 | I32 unwind1; |
| 2954 | re_unwind_branch_t *uw; |
| 2955 | |
| 2956 | /* Put unwinding data on stack */ |
| 2957 | unwind1 = SSNEWt(1,re_unwind_branch_t); |
| 2958 | uw = SSPTRt(unwind1,re_unwind_branch_t); |
| 2959 | uw->prev = unwind; |
| 2960 | unwind = unwind1; |
| 2961 | uw->type = ((c1 == BRANCH) |
| 2962 | ? RE_UNWIND_BRANCH |
| 2963 | : RE_UNWIND_BRANCHJ); |
| 2964 | uw->lastparen = lastparen; |
| 2965 | uw->next = next; |
| 2966 | uw->locinput = locinput; |
| 2967 | uw->nextchr = nextchr; |
| 2968 | #ifdef DEBUGGING |
| 2969 | uw->regindent = ++PL_regindent; |
| 2970 | #endif |
| 2971 | |
| 2972 | REGCP_SET(uw->lastcp); |
| 2973 | |
| 2974 | /* Now go into the first branch */ |
| 2975 | next = inner; |
| 2976 | } |
| 2977 | } |
| 2978 | break; |
| 2979 | case MINMOD: |
| 2980 | minmod = 1; |
| 2981 | break; |
| 2982 | case CURLYM: |
| 2983 | { |
| 2984 | I32 l = 0; |
| 2985 | CHECKPOINT lastcp; |
| 2986 | |
| 2987 | /* We suppose that the next guy does not need |
| 2988 | backtracking: in particular, it is of constant length, |
| 2989 | and has no parenths to influence future backrefs. */ |
| 2990 | ln = ARG1(scan); /* min to match */ |
| 2991 | n = ARG2(scan); /* max to match */ |
| 2992 | paren = scan->flags; |
| 2993 | if (paren) { |
| 2994 | if (paren > PL_regsize) |
| 2995 | PL_regsize = paren; |
| 2996 | if (paren > *PL_reglastparen) |
| 2997 | *PL_reglastparen = paren; |
| 2998 | } |
| 2999 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
| 3000 | if (paren) |
| 3001 | scan += NEXT_OFF(scan); /* Skip former OPEN. */ |
| 3002 | PL_reginput = locinput; |
| 3003 | if (minmod) { |
| 3004 | minmod = 0; |
| 3005 | if (ln && regrepeat_hard(scan, ln, &l) < ln) |
| 3006 | sayNO; |
| 3007 | if (ln && l == 0 && n >= ln |
| 3008 | /* In fact, this is tricky. If paren, then the |
| 3009 | fact that we did/didnot match may influence |
| 3010 | future execution. */ |
| 3011 | && !(paren && ln == 0)) |
| 3012 | ln = n; |
| 3013 | locinput = PL_reginput; |
| 3014 | if (PL_regkind[(U8)OP(next)] == EXACT) { |
| 3015 | c1 = (U8)*STRING(next); |
| 3016 | if (OP(next) == EXACTF) |
| 3017 | c2 = PL_fold[c1]; |
| 3018 | else if (OP(next) == EXACTFL) |
| 3019 | c2 = PL_fold_locale[c1]; |
| 3020 | else |
| 3021 | c2 = c1; |
| 3022 | } |
| 3023 | else |
| 3024 | c1 = c2 = -1000; |
| 3025 | REGCP_SET(lastcp); |
| 3026 | /* This may be improved if l == 0. */ |
| 3027 | while (n >= ln || (n == REG_INFTY && ln > 0 && l)) { /* ln overflow ? */ |
| 3028 | /* If it could work, try it. */ |
| 3029 | if (c1 == -1000 || |
| 3030 | UCHARAT(PL_reginput) == c1 || |
| 3031 | UCHARAT(PL_reginput) == c2) |
| 3032 | { |
| 3033 | if (paren) { |
| 3034 | if (n) { |
| 3035 | PL_regstartp[paren] = |
| 3036 | HOPc(PL_reginput, -l) - PL_bostr; |
| 3037 | PL_regendp[paren] = PL_reginput - PL_bostr; |
| 3038 | } |
| 3039 | else |
| 3040 | PL_regendp[paren] = -1; |
| 3041 | } |
| 3042 | if (regmatch(next)) |
| 3043 | sayYES; |
| 3044 | REGCP_UNWIND(lastcp); |
| 3045 | } |
| 3046 | /* Couldn't or didn't -- move forward. */ |
| 3047 | PL_reginput = locinput; |
| 3048 | if (regrepeat_hard(scan, 1, &l)) { |
| 3049 | ln++; |
| 3050 | locinput = PL_reginput; |
| 3051 | } |
| 3052 | else |
| 3053 | sayNO; |
| 3054 | } |
| 3055 | } |
| 3056 | else { |
| 3057 | n = regrepeat_hard(scan, n, &l); |
| 3058 | if (n != 0 && l == 0 |
| 3059 | /* In fact, this is tricky. If paren, then the |
| 3060 | fact that we did/didnot match may influence |
| 3061 | future execution. */ |
| 3062 | && !(paren && ln == 0)) |
| 3063 | ln = n; |
| 3064 | locinput = PL_reginput; |
| 3065 | DEBUG_r( |
| 3066 | PerlIO_printf(Perl_debug_log, |
| 3067 | "%*s matched %"IVdf" times, len=%"IVdf"...\n", |
| 3068 | (int)(REPORT_CODE_OFF+PL_regindent*2), "", |
| 3069 | (IV) n, (IV)l) |
| 3070 | ); |
| 3071 | if (n >= ln) { |
| 3072 | if (PL_regkind[(U8)OP(next)] == EXACT) { |
| 3073 | c1 = (U8)*STRING(next); |
| 3074 | if (OP(next) == EXACTF) |
| 3075 | c2 = PL_fold[c1]; |
| 3076 | else if (OP(next) == EXACTFL) |
| 3077 | c2 = PL_fold_locale[c1]; |
| 3078 | else |
| 3079 | c2 = c1; |
| 3080 | } |
| 3081 | else |
| 3082 | c1 = c2 = -1000; |
| 3083 | } |
| 3084 | REGCP_SET(lastcp); |
| 3085 | while (n >= ln) { |
| 3086 | /* If it could work, try it. */ |
| 3087 | if (c1 == -1000 || |
| 3088 | UCHARAT(PL_reginput) == c1 || |
| 3089 | UCHARAT(PL_reginput) == c2) |
| 3090 | { |
| 3091 | DEBUG_r( |
| 3092 | PerlIO_printf(Perl_debug_log, |
| 3093 | "%*s trying tail with n=%"IVdf"...\n", |
| 3094 | (int)(REPORT_CODE_OFF+PL_regindent*2), "", (IV)n) |
| 3095 | ); |
| 3096 | if (paren) { |
| 3097 | if (n) { |
| 3098 | PL_regstartp[paren] = HOPc(PL_reginput, -l) - PL_bostr; |
| 3099 | PL_regendp[paren] = PL_reginput - PL_bostr; |
| 3100 | } |
| 3101 | else |
| 3102 | PL_regendp[paren] = -1; |
| 3103 | } |
| 3104 | if (regmatch(next)) |
| 3105 | sayYES; |
| 3106 | REGCP_UNWIND(lastcp); |
| 3107 | } |
| 3108 | /* Couldn't or didn't -- back up. */ |
| 3109 | n--; |
| 3110 | locinput = HOPc(locinput, -l); |
| 3111 | PL_reginput = locinput; |
| 3112 | } |
| 3113 | } |
| 3114 | sayNO; |
| 3115 | break; |
| 3116 | } |
| 3117 | case CURLYN: |
| 3118 | paren = scan->flags; /* Which paren to set */ |
| 3119 | if (paren > PL_regsize) |
| 3120 | PL_regsize = paren; |
| 3121 | if (paren > *PL_reglastparen) |
| 3122 | *PL_reglastparen = paren; |
| 3123 | ln = ARG1(scan); /* min to match */ |
| 3124 | n = ARG2(scan); /* max to match */ |
| 3125 | scan = regnext(NEXTOPER(scan) + NODE_STEP_REGNODE); |
| 3126 | goto repeat; |
| 3127 | case CURLY: |
| 3128 | paren = 0; |
| 3129 | ln = ARG1(scan); /* min to match */ |
| 3130 | n = ARG2(scan); /* max to match */ |
| 3131 | scan = NEXTOPER(scan) + NODE_STEP_REGNODE; |
| 3132 | goto repeat; |
| 3133 | case STAR: |
| 3134 | ln = 0; |
| 3135 | n = REG_INFTY; |
| 3136 | scan = NEXTOPER(scan); |
| 3137 | paren = 0; |
| 3138 | goto repeat; |
| 3139 | case PLUS: |
| 3140 | ln = 1; |
| 3141 | n = REG_INFTY; |
| 3142 | scan = NEXTOPER(scan); |
| 3143 | paren = 0; |
| 3144 | repeat: |
| 3145 | /* |
| 3146 | * Lookahead to avoid useless match attempts |
| 3147 | * when we know what character comes next. |
| 3148 | */ |
| 3149 | if (PL_regkind[(U8)OP(next)] == EXACT) { |
| 3150 | U8 *s = (U8*)STRING(next); |
| 3151 | if (!UTF) { |
| 3152 | c2 = c1 = *s; |
| 3153 | if (OP(next) == EXACTF) |
| 3154 | c2 = PL_fold[c1]; |
| 3155 | else if (OP(next) == EXACTFL) |
| 3156 | c2 = PL_fold_locale[c1]; |
| 3157 | } |
| 3158 | else { /* UTF */ |
| 3159 | if (OP(next) == EXACTF) { |
| 3160 | c1 = to_utf8_lower(s); |
| 3161 | c2 = to_utf8_upper(s); |
| 3162 | } |
| 3163 | else { |
| 3164 | c2 = c1 = utf8_to_uvchr(s, NULL); |
| 3165 | } |
| 3166 | } |
| 3167 | } |
| 3168 | else |
| 3169 | c1 = c2 = -1000; |
| 3170 | PL_reginput = locinput; |
| 3171 | if (minmod) { |
| 3172 | CHECKPOINT lastcp; |
| 3173 | minmod = 0; |
| 3174 | if (ln && regrepeat(scan, ln) < ln) |
| 3175 | sayNO; |
| 3176 | locinput = PL_reginput; |
| 3177 | REGCP_SET(lastcp); |
| 3178 | if (c1 != -1000) { |
| 3179 | char *e; /* Should not check after this */ |
| 3180 | char *old = locinput; |
| 3181 | |
| 3182 | if (n == REG_INFTY) { |
| 3183 | e = PL_regeol - 1; |
| 3184 | if (do_utf8) |
| 3185 | while (UTF8_IS_CONTINUATION(*(U8*)e)) |
| 3186 | e--; |
| 3187 | } |
| 3188 | else if (do_utf8) { |
| 3189 | int m = n - ln; |
| 3190 | for (e = locinput; |
| 3191 | m >0 && e + UTF8SKIP(e) <= PL_regeol; m--) |
| 3192 | e += UTF8SKIP(e); |
| 3193 | } |
| 3194 | else { |
| 3195 | e = locinput + n - ln; |
| 3196 | if (e >= PL_regeol) |
| 3197 | e = PL_regeol - 1; |
| 3198 | } |
| 3199 | while (1) { |
| 3200 | int count; |
| 3201 | /* Find place 'next' could work */ |
| 3202 | if (!do_utf8) { |
| 3203 | if (c1 == c2) { |
| 3204 | while (locinput <= e && *locinput != c1) |
| 3205 | locinput++; |
| 3206 | } else { |
| 3207 | while (locinput <= e |
| 3208 | && *locinput != c1 |
| 3209 | && *locinput != c2) |
| 3210 | locinput++; |
| 3211 | } |
| 3212 | count = locinput - old; |
| 3213 | } |
| 3214 | else { |
| 3215 | STRLEN len; |
| 3216 | if (c1 == c2) { |
| 3217 | for (count = 0; |
| 3218 | locinput <= e && |
| 3219 | utf8_to_uvchr((U8*)locinput, &len) != c1; |
| 3220 | count++) |
| 3221 | locinput += len; |
| 3222 | |
| 3223 | } else { |
| 3224 | for (count = 0; locinput <= e; count++) { |
| 3225 | UV c = utf8_to_uvchr((U8*)locinput, &len); |
| 3226 | if (c == c1 || c == c2) |
| 3227 | break; |
| 3228 | locinput += len; |
| 3229 | } |
| 3230 | } |
| 3231 | } |
| 3232 | if (locinput > e) |
| 3233 | sayNO; |
| 3234 | /* PL_reginput == old now */ |
| 3235 | if (locinput != old) { |
| 3236 | ln = 1; /* Did some */ |
| 3237 | if (regrepeat(scan, count) < count) |
| 3238 | sayNO; |
| 3239 | } |
| 3240 | /* PL_reginput == locinput now */ |
| 3241 | TRYPAREN(paren, ln, locinput); |
| 3242 | PL_reginput = locinput; /* Could be reset... */ |
| 3243 | REGCP_UNWIND(lastcp); |
| 3244 | /* Couldn't or didn't -- move forward. */ |
| 3245 | old = locinput; |
| 3246 | if (do_utf8) |
| 3247 | locinput += UTF8SKIP(locinput); |
| 3248 | else |
| 3249 | locinput++; |
| 3250 | } |
| 3251 | } |
| 3252 | else |
| 3253 | while (n >= ln || (n == REG_INFTY && ln > 0)) { /* ln overflow ? */ |
| 3254 | UV c; |
| 3255 | if (c1 != -1000) { |
| 3256 | if (do_utf8) |
| 3257 | c = utf8_to_uvchr((U8*)PL_reginput, NULL); |
| 3258 | else |
| 3259 | c = UCHARAT(PL_reginput); |
| 3260 | /* If it could work, try it. */ |
| 3261 | if (c == c1 || c == c2) |
| 3262 | { |
| 3263 | TRYPAREN(paren, n, PL_reginput); |
| 3264 | REGCP_UNWIND(lastcp); |
| 3265 | } |
| 3266 | } |
| 3267 | /* If it could work, try it. */ |
| 3268 | else if (c1 == -1000) |
| 3269 | { |
| 3270 | TRYPAREN(paren, n, PL_reginput); |
| 3271 | REGCP_UNWIND(lastcp); |
| 3272 | } |
| 3273 | /* Couldn't or didn't -- move forward. */ |
| 3274 | PL_reginput = locinput; |
| 3275 | if (regrepeat(scan, 1)) { |
| 3276 | ln++; |
| 3277 | locinput = PL_reginput; |
| 3278 | } |
| 3279 | else |
| 3280 | sayNO; |
| 3281 | } |
| 3282 | } |
| 3283 | else { |
| 3284 | CHECKPOINT lastcp; |
| 3285 | n = regrepeat(scan, n); |
| 3286 | locinput = PL_reginput; |
| 3287 | if (ln < n && PL_regkind[(U8)OP(next)] == EOL && |
| 3288 | (!PL_multiline || OP(next) == SEOL || OP(next) == EOS)) { |
| 3289 | ln = n; /* why back off? */ |
| 3290 | /* ...because $ and \Z can match before *and* after |
| 3291 | newline at the end. Consider "\n\n" =~ /\n+\Z\n/. |
| 3292 | We should back off by one in this case. */ |
| 3293 | if (UCHARAT(PL_reginput - 1) == '\n' && OP(next) != EOS) |
| 3294 | ln--; |
| 3295 | } |
| 3296 | REGCP_SET(lastcp); |
| 3297 | if (paren) { |
| 3298 | UV c = 0; |
| 3299 | while (n >= ln) { |
| 3300 | if (c1 != -1000) { |
| 3301 | if (do_utf8) |
| 3302 | c = utf8_to_uvchr((U8*)PL_reginput, NULL); |
| 3303 | else |
| 3304 | c = UCHARAT(PL_reginput); |
| 3305 | } |
| 3306 | /* If it could work, try it. */ |
| 3307 | if (c1 == -1000 || c == c1 || c == c2) |
| 3308 | { |
| 3309 | TRYPAREN(paren, n, PL_reginput); |
| 3310 | REGCP_UNWIND(lastcp); |
| 3311 | } |
| 3312 | /* Couldn't or didn't -- back up. */ |
| 3313 | n--; |
| 3314 | PL_reginput = locinput = HOPc(locinput, -1); |
| 3315 | } |
| 3316 | } |
| 3317 | else { |
| 3318 | UV c = 0; |
| 3319 | while (n >= ln) { |
| 3320 | if (c1 != -1000) { |
| 3321 | if (do_utf8) |
| 3322 | c = utf8_to_uvchr((U8*)PL_reginput, NULL); |
| 3323 | else |
| 3324 | c = UCHARAT(PL_reginput); |
| 3325 | } |
| 3326 | /* If it could work, try it. */ |
| 3327 | if (c1 == -1000 || c == c1 || c == c2) |
| 3328 | { |
| 3329 | TRYPAREN(paren, n, PL_reginput); |
| 3330 | REGCP_UNWIND(lastcp); |
| 3331 | } |
| 3332 | /* Couldn't or didn't -- back up. */ |
| 3333 | n--; |
| 3334 | PL_reginput = locinput = HOPc(locinput, -1); |
| 3335 | } |
| 3336 | } |
| 3337 | } |
| 3338 | sayNO; |
| 3339 | break; |
| 3340 | case END: |
| 3341 | if (PL_reg_call_cc) { |
| 3342 | re_cc_state *cur_call_cc = PL_reg_call_cc; |
| 3343 | CURCUR *cctmp = PL_regcc; |
| 3344 | regexp *re = PL_reg_re; |
| 3345 | CHECKPOINT cp, lastcp; |
| 3346 | |
| 3347 | cp = regcppush(0); /* Save *all* the positions. */ |
| 3348 | REGCP_SET(lastcp); |
| 3349 | regcp_set_to(PL_reg_call_cc->ss); /* Restore parens of |
| 3350 | the caller. */ |
| 3351 | PL_reginput = locinput; /* Make position available to |
| 3352 | the callcc. */ |
| 3353 | cache_re(PL_reg_call_cc->re); |
| 3354 | PL_regcc = PL_reg_call_cc->cc; |
| 3355 | PL_reg_call_cc = PL_reg_call_cc->prev; |
| 3356 | if (regmatch(cur_call_cc->node)) { |
| 3357 | PL_reg_call_cc = cur_call_cc; |
| 3358 | regcpblow(cp); |
| 3359 | sayYES; |
| 3360 | } |
| 3361 | REGCP_UNWIND(lastcp); |
| 3362 | regcppop(); |
| 3363 | PL_reg_call_cc = cur_call_cc; |
| 3364 | PL_regcc = cctmp; |
| 3365 | PL_reg_re = re; |
| 3366 | cache_re(re); |
| 3367 | |
| 3368 | DEBUG_r( |
| 3369 | PerlIO_printf(Perl_debug_log, |
| 3370 | "%*s continuation failed...\n", |
| 3371 | REPORT_CODE_OFF+PL_regindent*2, "") |
| 3372 | ); |
| 3373 | sayNO_SILENT; |
| 3374 | } |
| 3375 | if (locinput < PL_regtill) { |
| 3376 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
| 3377 | "%sMatch possible, but length=%ld is smaller than requested=%ld, failing!%s\n", |
| 3378 | PL_colors[4], |
| 3379 | (long)(locinput - PL_reg_starttry), |
| 3380 | (long)(PL_regtill - PL_reg_starttry), |
| 3381 | PL_colors[5])); |
| 3382 | sayNO_FINAL; /* Cannot match: too short. */ |
| 3383 | } |
| 3384 | PL_reginput = locinput; /* put where regtry can find it */ |
| 3385 | sayYES_FINAL; /* Success! */ |
| 3386 | case SUCCEED: |
| 3387 | PL_reginput = locinput; /* put where regtry can find it */ |
| 3388 | sayYES_LOUD; /* Success! */ |
| 3389 | case SUSPEND: |
| 3390 | n = 1; |
| 3391 | PL_reginput = locinput; |
| 3392 | goto do_ifmatch; |
| 3393 | case UNLESSM: |
| 3394 | n = 0; |
| 3395 | if (scan->flags) { |
| 3396 | s = HOPBACKc(locinput, scan->flags); |
| 3397 | if (!s) |
| 3398 | goto say_yes; |
| 3399 | PL_reginput = s; |
| 3400 | } |
| 3401 | else |
| 3402 | PL_reginput = locinput; |
| 3403 | goto do_ifmatch; |
| 3404 | case IFMATCH: |
| 3405 | n = 1; |
| 3406 | if (scan->flags) { |
| 3407 | s = HOPBACKc(locinput, scan->flags); |
| 3408 | if (!s) |
| 3409 | goto say_no; |
| 3410 | PL_reginput = s; |
| 3411 | } |
| 3412 | else |
| 3413 | PL_reginput = locinput; |
| 3414 | |
| 3415 | do_ifmatch: |
| 3416 | inner = NEXTOPER(NEXTOPER(scan)); |
| 3417 | if (regmatch(inner) != n) { |
| 3418 | say_no: |
| 3419 | if (logical) { |
| 3420 | logical = 0; |
| 3421 | sw = 0; |
| 3422 | goto do_longjump; |
| 3423 | } |
| 3424 | else |
| 3425 | sayNO; |
| 3426 | } |
| 3427 | say_yes: |
| 3428 | if (logical) { |
| 3429 | logical = 0; |
| 3430 | sw = 1; |
| 3431 | } |
| 3432 | if (OP(scan) == SUSPEND) { |
| 3433 | locinput = PL_reginput; |
| 3434 | nextchr = UCHARAT(locinput); |
| 3435 | } |
| 3436 | /* FALL THROUGH. */ |
| 3437 | case LONGJMP: |
| 3438 | do_longjump: |
| 3439 | next = scan + ARG(scan); |
| 3440 | if (next == scan) |
| 3441 | next = NULL; |
| 3442 | break; |
| 3443 | default: |
| 3444 | PerlIO_printf(Perl_error_log, "%"UVxf" %d\n", |
| 3445 | PTR2UV(scan), OP(scan)); |
| 3446 | Perl_croak(aTHX_ "regexp memory corruption"); |
| 3447 | } |
| 3448 | reenter: |
| 3449 | scan = next; |
| 3450 | } |
| 3451 | |
| 3452 | /* |
| 3453 | * We get here only if there's trouble -- normally "case END" is |
| 3454 | * the terminating point. |
| 3455 | */ |
| 3456 | Perl_croak(aTHX_ "corrupted regexp pointers"); |
| 3457 | /*NOTREACHED*/ |
| 3458 | sayNO; |
| 3459 | |
| 3460 | yes_loud: |
| 3461 | DEBUG_r( |
| 3462 | PerlIO_printf(Perl_debug_log, |
| 3463 | "%*s %scould match...%s\n", |
| 3464 | REPORT_CODE_OFF+PL_regindent*2, "", PL_colors[4],PL_colors[5]) |
| 3465 | ); |
| 3466 | goto yes; |
| 3467 | yes_final: |
| 3468 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%sMatch successful!%s\n", |
| 3469 | PL_colors[4],PL_colors[5])); |
| 3470 | yes: |
| 3471 | #ifdef DEBUGGING |
| 3472 | PL_regindent--; |
| 3473 | #endif |
| 3474 | |
| 3475 | #if 0 /* Breaks $^R */ |
| 3476 | if (unwind) |
| 3477 | regcpblow(firstcp); |
| 3478 | #endif |
| 3479 | return 1; |
| 3480 | |
| 3481 | no: |
| 3482 | DEBUG_r( |
| 3483 | PerlIO_printf(Perl_debug_log, |
| 3484 | "%*s %sfailed...%s\n", |
| 3485 | REPORT_CODE_OFF+PL_regindent*2, "",PL_colors[4],PL_colors[5]) |
| 3486 | ); |
| 3487 | goto do_no; |
| 3488 | no_final: |
| 3489 | do_no: |
| 3490 | if (unwind) { |
| 3491 | re_unwind_t *uw = SSPTRt(unwind,re_unwind_t); |
| 3492 | |
| 3493 | switch (uw->type) { |
| 3494 | case RE_UNWIND_BRANCH: |
| 3495 | case RE_UNWIND_BRANCHJ: |
| 3496 | { |
| 3497 | re_unwind_branch_t *uwb = &(uw->branch); |
| 3498 | I32 lastparen = uwb->lastparen; |
| 3499 | |
| 3500 | REGCP_UNWIND(uwb->lastcp); |
| 3501 | for (n = *PL_reglastparen; n > lastparen; n--) |
| 3502 | PL_regendp[n] = -1; |
| 3503 | *PL_reglastparen = n; |
| 3504 | scan = next = uwb->next; |
| 3505 | if ( !scan || |
| 3506 | OP(scan) != (uwb->type == RE_UNWIND_BRANCH |
| 3507 | ? BRANCH : BRANCHJ) ) { /* Failure */ |
| 3508 | unwind = uwb->prev; |
| 3509 | #ifdef DEBUGGING |
| 3510 | PL_regindent--; |
| 3511 | #endif |
| 3512 | goto do_no; |
| 3513 | } |
| 3514 | /* Have more choice yet. Reuse the same uwb. */ |
| 3515 | /*SUPPRESS 560*/ |
| 3516 | if ((n = (uwb->type == RE_UNWIND_BRANCH |
| 3517 | ? NEXT_OFF(next) : ARG(next)))) |
| 3518 | next += n; |
| 3519 | else |
| 3520 | next = NULL; /* XXXX Needn't unwinding in this case... */ |
| 3521 | uwb->next = next; |
| 3522 | next = NEXTOPER(scan); |
| 3523 | if (uwb->type == RE_UNWIND_BRANCHJ) |
| 3524 | next = NEXTOPER(next); |
| 3525 | locinput = uwb->locinput; |
| 3526 | nextchr = uwb->nextchr; |
| 3527 | #ifdef DEBUGGING |
| 3528 | PL_regindent = uwb->regindent; |
| 3529 | #endif |
| 3530 | |
| 3531 | goto reenter; |
| 3532 | } |
| 3533 | /* NOT REACHED */ |
| 3534 | default: |
| 3535 | Perl_croak(aTHX_ "regexp unwind memory corruption"); |
| 3536 | } |
| 3537 | /* NOT REACHED */ |
| 3538 | } |
| 3539 | #ifdef DEBUGGING |
| 3540 | PL_regindent--; |
| 3541 | #endif |
| 3542 | return 0; |
| 3543 | } |
| 3544 | |
| 3545 | /* |
| 3546 | - regrepeat - repeatedly match something simple, report how many |
| 3547 | */ |
| 3548 | /* |
| 3549 | * [This routine now assumes that it will only match on things of length 1. |
| 3550 | * That was true before, but now we assume scan - reginput is the count, |
| 3551 | * rather than incrementing count on every character. [Er, except utf8.]] |
| 3552 | */ |
| 3553 | STATIC I32 |
| 3554 | S_regrepeat(pTHX_ regnode *p, I32 max) |
| 3555 | { |
| 3556 | register char *scan; |
| 3557 | register I32 c; |
| 3558 | register char *loceol = PL_regeol; |
| 3559 | register I32 hardcount = 0; |
| 3560 | register bool do_utf8 = DO_UTF8(PL_reg_sv); |
| 3561 | |
| 3562 | scan = PL_reginput; |
| 3563 | if (max != REG_INFTY && max < loceol - scan) |
| 3564 | loceol = scan + max; |
| 3565 | switch (OP(p)) { |
| 3566 | case REG_ANY: |
| 3567 | if (do_utf8) { |
| 3568 | loceol = PL_regeol; |
| 3569 | while (scan < loceol && hardcount < max && *scan != '\n') { |
| 3570 | scan += UTF8SKIP(scan); |
| 3571 | hardcount++; |
| 3572 | } |
| 3573 | } else { |
| 3574 | while (scan < loceol && *scan != '\n') |
| 3575 | scan++; |
| 3576 | } |
| 3577 | break; |
| 3578 | case SANY: |
| 3579 | scan = loceol; |
| 3580 | break; |
| 3581 | case EXACT: /* length of string is 1 */ |
| 3582 | c = (U8)*STRING(p); |
| 3583 | while (scan < loceol && UCHARAT(scan) == c) |
| 3584 | scan++; |
| 3585 | break; |
| 3586 | case EXACTF: /* length of string is 1 */ |
| 3587 | c = (U8)*STRING(p); |
| 3588 | while (scan < loceol && |
| 3589 | (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold[c])) |
| 3590 | scan++; |
| 3591 | break; |
| 3592 | case EXACTFL: /* length of string is 1 */ |
| 3593 | PL_reg_flags |= RF_tainted; |
| 3594 | c = (U8)*STRING(p); |
| 3595 | while (scan < loceol && |
| 3596 | (UCHARAT(scan) == c || UCHARAT(scan) == PL_fold_locale[c])) |
| 3597 | scan++; |
| 3598 | break; |
| 3599 | case ANYOF: |
| 3600 | if (do_utf8) { |
| 3601 | loceol = PL_regeol; |
| 3602 | while (hardcount < max && scan < loceol && |
| 3603 | reginclass(p, (U8*)scan, do_utf8)) { |
| 3604 | scan += UTF8SKIP(scan); |
| 3605 | hardcount++; |
| 3606 | } |
| 3607 | } else { |
| 3608 | while (scan < loceol && reginclass(p, (U8*)scan, do_utf8)) |
| 3609 | scan++; |
| 3610 | } |
| 3611 | break; |
| 3612 | case ALNUM: |
| 3613 | if (do_utf8) { |
| 3614 | loceol = PL_regeol; |
| 3615 | LOAD_UTF8_CHARCLASS(alnum,"a"); |
| 3616 | while (hardcount < max && scan < loceol && |
| 3617 | swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) { |
| 3618 | scan += UTF8SKIP(scan); |
| 3619 | hardcount++; |
| 3620 | } |
| 3621 | } else { |
| 3622 | while (scan < loceol && isALNUM(*scan)) |
| 3623 | scan++; |
| 3624 | } |
| 3625 | break; |
| 3626 | case ALNUML: |
| 3627 | PL_reg_flags |= RF_tainted; |
| 3628 | if (do_utf8) { |
| 3629 | loceol = PL_regeol; |
| 3630 | while (hardcount < max && scan < loceol && |
| 3631 | isALNUM_LC_utf8((U8*)scan)) { |
| 3632 | scan += UTF8SKIP(scan); |
| 3633 | hardcount++; |
| 3634 | } |
| 3635 | } else { |
| 3636 | while (scan < loceol && isALNUM_LC(*scan)) |
| 3637 | scan++; |
| 3638 | } |
| 3639 | break; |
| 3640 | case NALNUM: |
| 3641 | if (do_utf8) { |
| 3642 | loceol = PL_regeol; |
| 3643 | LOAD_UTF8_CHARCLASS(alnum,"a"); |
| 3644 | while (hardcount < max && scan < loceol && |
| 3645 | !swash_fetch(PL_utf8_alnum, (U8*)scan, do_utf8)) { |
| 3646 | scan += UTF8SKIP(scan); |
| 3647 | hardcount++; |
| 3648 | } |
| 3649 | } else { |
| 3650 | while (scan < loceol && !isALNUM(*scan)) |
| 3651 | scan++; |
| 3652 | } |
| 3653 | break; |
| 3654 | case NALNUML: |
| 3655 | PL_reg_flags |= RF_tainted; |
| 3656 | if (do_utf8) { |
| 3657 | loceol = PL_regeol; |
| 3658 | while (hardcount < max && scan < loceol && |
| 3659 | !isALNUM_LC_utf8((U8*)scan)) { |
| 3660 | scan += UTF8SKIP(scan); |
| 3661 | hardcount++; |
| 3662 | } |
| 3663 | } else { |
| 3664 | while (scan < loceol && !isALNUM_LC(*scan)) |
| 3665 | scan++; |
| 3666 | } |
| 3667 | break; |
| 3668 | case SPACE: |
| 3669 | if (do_utf8) { |
| 3670 | loceol = PL_regeol; |
| 3671 | LOAD_UTF8_CHARCLASS(space," "); |
| 3672 | while (hardcount < max && scan < loceol && |
| 3673 | (*scan == ' ' || |
| 3674 | swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) { |
| 3675 | scan += UTF8SKIP(scan); |
| 3676 | hardcount++; |
| 3677 | } |
| 3678 | } else { |
| 3679 | while (scan < loceol && isSPACE(*scan)) |
| 3680 | scan++; |
| 3681 | } |
| 3682 | break; |
| 3683 | case SPACEL: |
| 3684 | PL_reg_flags |= RF_tainted; |
| 3685 | if (do_utf8) { |
| 3686 | loceol = PL_regeol; |
| 3687 | while (hardcount < max && scan < loceol && |
| 3688 | (*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
| 3689 | scan += UTF8SKIP(scan); |
| 3690 | hardcount++; |
| 3691 | } |
| 3692 | } else { |
| 3693 | while (scan < loceol && isSPACE_LC(*scan)) |
| 3694 | scan++; |
| 3695 | } |
| 3696 | break; |
| 3697 | case NSPACE: |
| 3698 | if (do_utf8) { |
| 3699 | loceol = PL_regeol; |
| 3700 | LOAD_UTF8_CHARCLASS(space," "); |
| 3701 | while (hardcount < max && scan < loceol && |
| 3702 | !(*scan == ' ' || |
| 3703 | swash_fetch(PL_utf8_space,(U8*)scan, do_utf8))) { |
| 3704 | scan += UTF8SKIP(scan); |
| 3705 | hardcount++; |
| 3706 | } |
| 3707 | } else { |
| 3708 | while (scan < loceol && !isSPACE(*scan)) |
| 3709 | scan++; |
| 3710 | break; |
| 3711 | } |
| 3712 | case NSPACEL: |
| 3713 | PL_reg_flags |= RF_tainted; |
| 3714 | if (do_utf8) { |
| 3715 | loceol = PL_regeol; |
| 3716 | while (hardcount < max && scan < loceol && |
| 3717 | !(*scan == ' ' || isSPACE_LC_utf8((U8*)scan))) { |
| 3718 | scan += UTF8SKIP(scan); |
| 3719 | hardcount++; |
| 3720 | } |
| 3721 | } else { |
| 3722 | while (scan < loceol && !isSPACE_LC(*scan)) |
| 3723 | scan++; |
| 3724 | } |
| 3725 | break; |
| 3726 | case DIGIT: |
| 3727 | if (do_utf8) { |
| 3728 | loceol = PL_regeol; |
| 3729 | LOAD_UTF8_CHARCLASS(digit,"0"); |
| 3730 | while (hardcount < max && scan < loceol && |
| 3731 | swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) { |
| 3732 | scan += UTF8SKIP(scan); |
| 3733 | hardcount++; |
| 3734 | } |
| 3735 | } else { |
| 3736 | while (scan < loceol && isDIGIT(*scan)) |
| 3737 | scan++; |
| 3738 | } |
| 3739 | break; |
| 3740 | case NDIGIT: |
| 3741 | if (do_utf8) { |
| 3742 | loceol = PL_regeol; |
| 3743 | LOAD_UTF8_CHARCLASS(digit,"0"); |
| 3744 | while (hardcount < max && scan < loceol && |
| 3745 | !swash_fetch(PL_utf8_digit, (U8*)scan, do_utf8)) { |
| 3746 | scan += UTF8SKIP(scan); |
| 3747 | hardcount++; |
| 3748 | } |
| 3749 | } else { |
| 3750 | while (scan < loceol && !isDIGIT(*scan)) |
| 3751 | scan++; |
| 3752 | } |
| 3753 | break; |
| 3754 | default: /* Called on something of 0 width. */ |
| 3755 | break; /* So match right here or not at all. */ |
| 3756 | } |
| 3757 | |
| 3758 | if (hardcount) |
| 3759 | c = hardcount; |
| 3760 | else |
| 3761 | c = scan - PL_reginput; |
| 3762 | PL_reginput = scan; |
| 3763 | |
| 3764 | DEBUG_r( |
| 3765 | { |
| 3766 | SV *prop = sv_newmortal(); |
| 3767 | |
| 3768 | regprop(prop, p); |
| 3769 | PerlIO_printf(Perl_debug_log, |
| 3770 | "%*s %s can match %"IVdf" times out of %"IVdf"...\n", |
| 3771 | REPORT_CODE_OFF+1, "", SvPVX(prop),(IV)c,(IV)max); |
| 3772 | }); |
| 3773 | |
| 3774 | return(c); |
| 3775 | } |
| 3776 | |
| 3777 | /* |
| 3778 | - regrepeat_hard - repeatedly match something, report total lenth and length |
| 3779 | * |
| 3780 | * The repeater is supposed to have constant length. |
| 3781 | */ |
| 3782 | |
| 3783 | STATIC I32 |
| 3784 | S_regrepeat_hard(pTHX_ regnode *p, I32 max, I32 *lp) |
| 3785 | { |
| 3786 | register char *scan = Nullch; |
| 3787 | register char *start; |
| 3788 | register char *loceol = PL_regeol; |
| 3789 | I32 l = 0; |
| 3790 | I32 count = 0, res = 1; |
| 3791 | |
| 3792 | if (!max) |
| 3793 | return 0; |
| 3794 | |
| 3795 | start = PL_reginput; |
| 3796 | if (DO_UTF8(PL_reg_sv)) { |
| 3797 | while (PL_reginput < loceol && (scan = PL_reginput, res = regmatch(p))) { |
| 3798 | if (!count++) { |
| 3799 | l = 0; |
| 3800 | while (start < PL_reginput) { |
| 3801 | l++; |
| 3802 | start += UTF8SKIP(start); |
| 3803 | } |
| 3804 | *lp = l; |
| 3805 | if (l == 0) |
| 3806 | return max; |
| 3807 | } |
| 3808 | if (count == max) |
| 3809 | return count; |
| 3810 | } |
| 3811 | } |
| 3812 | else { |
| 3813 | while (PL_reginput < loceol && (scan = PL_reginput, res = regmatch(p))) { |
| 3814 | if (!count++) { |
| 3815 | *lp = l = PL_reginput - start; |
| 3816 | if (max != REG_INFTY && l*max < loceol - scan) |
| 3817 | loceol = scan + l*max; |
| 3818 | if (l == 0) |
| 3819 | return max; |
| 3820 | } |
| 3821 | } |
| 3822 | } |
| 3823 | if (!res) |
| 3824 | PL_reginput = scan; |
| 3825 | |
| 3826 | return count; |
| 3827 | } |
| 3828 | |
| 3829 | /* |
| 3830 | - regclass_swash - prepare the utf8 swash |
| 3831 | */ |
| 3832 | |
| 3833 | SV * |
| 3834 | Perl_regclass_swash(pTHX_ register regnode* node, bool doinit, SV** initsvp) |
| 3835 | { |
| 3836 | SV *sw = NULL; |
| 3837 | SV *si = NULL; |
| 3838 | |
| 3839 | if (PL_regdata && PL_regdata->count) { |
| 3840 | U32 n = ARG(node); |
| 3841 | |
| 3842 | if (PL_regdata->what[n] == 's') { |
| 3843 | SV *rv = (SV*)PL_regdata->data[n]; |
| 3844 | AV *av = (AV*)SvRV((SV*)rv); |
| 3845 | SV **a; |
| 3846 | |
| 3847 | si = *av_fetch(av, 0, FALSE); |
| 3848 | a = av_fetch(av, 1, FALSE); |
| 3849 | |
| 3850 | if (a) |
| 3851 | sw = *a; |
| 3852 | else if (si && doinit) { |
| 3853 | sw = swash_init("utf8", "", si, 1, 0); |
| 3854 | (void)av_store(av, 1, sw); |
| 3855 | } |
| 3856 | } |
| 3857 | } |
| 3858 | |
| 3859 | if (initsvp) |
| 3860 | *initsvp = si; |
| 3861 | |
| 3862 | return sw; |
| 3863 | } |
| 3864 | |
| 3865 | /* |
| 3866 | - reginclass - determine if a character falls into a character class |
| 3867 | */ |
| 3868 | |
| 3869 | STATIC bool |
| 3870 | S_reginclass(pTHX_ register regnode *n, register U8* p, register bool do_utf8) |
| 3871 | { |
| 3872 | char flags = ANYOF_FLAGS(n); |
| 3873 | bool match = FALSE; |
| 3874 | UV c; |
| 3875 | STRLEN len = 0; |
| 3876 | |
| 3877 | c = do_utf8 ? utf8_to_uvchr(p, &len) : *p; |
| 3878 | |
| 3879 | if (do_utf8 || (flags & ANYOF_UNICODE)) { |
| 3880 | if (do_utf8 && !ANYOF_RUNTIME(n)) { |
| 3881 | if (len != (STRLEN)-1 && c < 256 && ANYOF_BITMAP_TEST(n, c)) |
| 3882 | match = TRUE; |
| 3883 | } |
| 3884 | if (!match && do_utf8 && (flags & ANYOF_UNICODE_ALL) && c >= 256) |
| 3885 | match = TRUE; |
| 3886 | if (!match) { |
| 3887 | SV *sw = regclass_swash(n, TRUE, 0); |
| 3888 | |
| 3889 | if (sw) { |
| 3890 | if (swash_fetch(sw, p, do_utf8)) |
| 3891 | match = TRUE; |
| 3892 | else if (flags & ANYOF_FOLD) { |
| 3893 | U8 tmpbuf[UTF8_MAXLEN+1]; |
| 3894 | |
| 3895 | if (flags & ANYOF_LOCALE) { |
| 3896 | PL_reg_flags |= RF_tainted; |
| 3897 | uvchr_to_utf8(tmpbuf, toLOWER_LC_utf8(p)); |
| 3898 | } |
| 3899 | else |
| 3900 | uvchr_to_utf8(tmpbuf, toLOWER_utf8(p)); |
| 3901 | if (swash_fetch(sw, tmpbuf, do_utf8)) |
| 3902 | match = TRUE; |
| 3903 | } |
| 3904 | } |
| 3905 | } |
| 3906 | } |
| 3907 | if (!match && c < 256) { |
| 3908 | if (ANYOF_BITMAP_TEST(n, c)) |
| 3909 | match = TRUE; |
| 3910 | else if (flags & ANYOF_FOLD) { |
| 3911 | I32 f; |
| 3912 | |
| 3913 | if (flags & ANYOF_LOCALE) { |
| 3914 | PL_reg_flags |= RF_tainted; |
| 3915 | f = PL_fold_locale[c]; |
| 3916 | } |
| 3917 | else |
| 3918 | f = PL_fold[c]; |
| 3919 | if (f != c && ANYOF_BITMAP_TEST(n, f)) |
| 3920 | match = TRUE; |
| 3921 | } |
| 3922 | |
| 3923 | if (!match && (flags & ANYOF_CLASS)) { |
| 3924 | PL_reg_flags |= RF_tainted; |
| 3925 | if ( |
| 3926 | (ANYOF_CLASS_TEST(n, ANYOF_ALNUM) && isALNUM_LC(c)) || |
| 3927 | (ANYOF_CLASS_TEST(n, ANYOF_NALNUM) && !isALNUM_LC(c)) || |
| 3928 | (ANYOF_CLASS_TEST(n, ANYOF_SPACE) && isSPACE_LC(c)) || |
| 3929 | (ANYOF_CLASS_TEST(n, ANYOF_NSPACE) && !isSPACE_LC(c)) || |
| 3930 | (ANYOF_CLASS_TEST(n, ANYOF_DIGIT) && isDIGIT_LC(c)) || |
| 3931 | (ANYOF_CLASS_TEST(n, ANYOF_NDIGIT) && !isDIGIT_LC(c)) || |
| 3932 | (ANYOF_CLASS_TEST(n, ANYOF_ALNUMC) && isALNUMC_LC(c)) || |
| 3933 | (ANYOF_CLASS_TEST(n, ANYOF_NALNUMC) && !isALNUMC_LC(c)) || |
| 3934 | (ANYOF_CLASS_TEST(n, ANYOF_ALPHA) && isALPHA_LC(c)) || |
| 3935 | (ANYOF_CLASS_TEST(n, ANYOF_NALPHA) && !isALPHA_LC(c)) || |
| 3936 | (ANYOF_CLASS_TEST(n, ANYOF_ASCII) && isASCII(c)) || |
| 3937 | (ANYOF_CLASS_TEST(n, ANYOF_NASCII) && !isASCII(c)) || |
| 3938 | (ANYOF_CLASS_TEST(n, ANYOF_CNTRL) && isCNTRL_LC(c)) || |
| 3939 | (ANYOF_CLASS_TEST(n, ANYOF_NCNTRL) && !isCNTRL_LC(c)) || |
| 3940 | (ANYOF_CLASS_TEST(n, ANYOF_GRAPH) && isGRAPH_LC(c)) || |
| 3941 | (ANYOF_CLASS_TEST(n, ANYOF_NGRAPH) && !isGRAPH_LC(c)) || |
| 3942 | (ANYOF_CLASS_TEST(n, ANYOF_LOWER) && isLOWER_LC(c)) || |
| 3943 | (ANYOF_CLASS_TEST(n, ANYOF_NLOWER) && !isLOWER_LC(c)) || |
| 3944 | (ANYOF_CLASS_TEST(n, ANYOF_PRINT) && isPRINT_LC(c)) || |
| 3945 | (ANYOF_CLASS_TEST(n, ANYOF_NPRINT) && !isPRINT_LC(c)) || |
| 3946 | (ANYOF_CLASS_TEST(n, ANYOF_PUNCT) && isPUNCT_LC(c)) || |
| 3947 | (ANYOF_CLASS_TEST(n, ANYOF_NPUNCT) && !isPUNCT_LC(c)) || |
| 3948 | (ANYOF_CLASS_TEST(n, ANYOF_UPPER) && isUPPER_LC(c)) || |
| 3949 | (ANYOF_CLASS_TEST(n, ANYOF_NUPPER) && !isUPPER_LC(c)) || |
| 3950 | (ANYOF_CLASS_TEST(n, ANYOF_XDIGIT) && isXDIGIT(c)) || |
| 3951 | (ANYOF_CLASS_TEST(n, ANYOF_NXDIGIT) && !isXDIGIT(c)) || |
| 3952 | (ANYOF_CLASS_TEST(n, ANYOF_PSXSPC) && isPSXSPC(c)) || |
| 3953 | (ANYOF_CLASS_TEST(n, ANYOF_NPSXSPC) && !isPSXSPC(c)) || |
| 3954 | (ANYOF_CLASS_TEST(n, ANYOF_BLANK) && isBLANK(c)) || |
| 3955 | (ANYOF_CLASS_TEST(n, ANYOF_NBLANK) && !isBLANK(c)) |
| 3956 | ) /* How's that for a conditional? */ |
| 3957 | { |
| 3958 | match = TRUE; |
| 3959 | } |
| 3960 | } |
| 3961 | } |
| 3962 | |
| 3963 | return (flags & ANYOF_INVERT) ? !match : match; |
| 3964 | } |
| 3965 | |
| 3966 | STATIC U8 * |
| 3967 | S_reghop(pTHX_ U8 *s, I32 off) |
| 3968 | { |
| 3969 | return S_reghop3(aTHX_ s, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)); |
| 3970 | } |
| 3971 | |
| 3972 | STATIC U8 * |
| 3973 | S_reghop3(pTHX_ U8 *s, I32 off, U8* lim) |
| 3974 | { |
| 3975 | if (off >= 0) { |
| 3976 | while (off-- && s < lim) { |
| 3977 | /* XXX could check well-formedness here */ |
| 3978 | s += UTF8SKIP(s); |
| 3979 | } |
| 3980 | } |
| 3981 | else { |
| 3982 | while (off++) { |
| 3983 | if (s > lim) { |
| 3984 | s--; |
| 3985 | if (UTF8_IS_CONTINUED(*s)) { |
| 3986 | while (s > (U8*)lim && UTF8_IS_CONTINUATION(*s)) |
| 3987 | s--; |
| 3988 | } |
| 3989 | /* XXX could check well-formedness here */ |
| 3990 | } |
| 3991 | } |
| 3992 | } |
| 3993 | return s; |
| 3994 | } |
| 3995 | |
| 3996 | STATIC U8 * |
| 3997 | S_reghopmaybe(pTHX_ U8 *s, I32 off) |
| 3998 | { |
| 3999 | return S_reghopmaybe3(aTHX_ s, off, (U8*)(off >= 0 ? PL_regeol : PL_bostr)); |
| 4000 | } |
| 4001 | |
| 4002 | STATIC U8 * |
| 4003 | S_reghopmaybe3(pTHX_ U8* s, I32 off, U8* lim) |
| 4004 | { |
| 4005 | if (off >= 0) { |
| 4006 | while (off-- && s < lim) { |
| 4007 | /* XXX could check well-formedness here */ |
| 4008 | s += UTF8SKIP(s); |
| 4009 | } |
| 4010 | if (off >= 0) |
| 4011 | return 0; |
| 4012 | } |
| 4013 | else { |
| 4014 | while (off++) { |
| 4015 | if (s > lim) { |
| 4016 | s--; |
| 4017 | if (UTF8_IS_CONTINUED(*s)) { |
| 4018 | while (s > (U8*)lim && UTF8_IS_CONTINUATION(*s)) |
| 4019 | s--; |
| 4020 | } |
| 4021 | /* XXX could check well-formedness here */ |
| 4022 | } |
| 4023 | else |
| 4024 | break; |
| 4025 | } |
| 4026 | if (off <= 0) |
| 4027 | return 0; |
| 4028 | } |
| 4029 | return s; |
| 4030 | } |
| 4031 | |
| 4032 | #ifdef PERL_OBJECT |
| 4033 | #include "XSUB.h" |
| 4034 | #endif |
| 4035 | |
| 4036 | static void |
| 4037 | restore_pos(pTHXo_ void *arg) |
| 4038 | { |
| 4039 | if (PL_reg_eval_set) { |
| 4040 | if (PL_reg_oldsaved) { |
| 4041 | PL_reg_re->subbeg = PL_reg_oldsaved; |
| 4042 | PL_reg_re->sublen = PL_reg_oldsavedlen; |
| 4043 | RX_MATCH_COPIED_on(PL_reg_re); |
| 4044 | } |
| 4045 | PL_reg_magic->mg_len = PL_reg_oldpos; |
| 4046 | PL_reg_eval_set = 0; |
| 4047 | PL_curpm = PL_reg_oldcurpm; |
| 4048 | } |
| 4049 | } |