X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=regexec.c;h=3b6d8577a7b8431ef7cc3feb901c8f79fc0682ed;hb=155aba94f677ac771761a1f510964fe5b21524ed;hp=684e344c16a91ac6ab6cf636b067b073e1bbae82;hpb=431052dcb0c56c6994af73d66835cf909449057e;p=p5sagit%2Fp5-mst-13.2.git diff --git a/regexec.c b/regexec.c index 684e344..3b6d857 100644 --- a/regexec.c +++ b/regexec.c @@ -66,7 +66,7 @@ * **** Alterations to Henry's code are... **** - **** Copyright (c) 1991-1999, Larry Wall + **** Copyright (c) 1991-2000, Larry Wall **** **** You may distribute under the terms of either the GNU General Public **** License or the Artistic License, as specified in the README file. @@ -146,13 +146,13 @@ S_regcppush(pTHX_ I32 parenfloor) /* These are needed since we do not localize EVAL nodes: */ # define REGCP_SET DEBUG_r(PerlIO_printf(Perl_debug_log, \ - " Setting an EVAL scope, savestack=%i\n", \ - PL_savestack_ix)); lastcp = PL_savestack_ix + " Setting an EVAL scope, savestack=%"IVdf"\n", \ + (IV)PL_savestack_ix)); lastcp = PL_savestack_ix # define REGCP_UNWIND DEBUG_r(lastcp != PL_savestack_ix ? \ PerlIO_printf(Perl_debug_log, \ - " Clearing an EVAL scope, savestack=%i..%i\n", \ - lastcp, PL_savestack_ix) : 0); regcpblow(lastcp) + " Clearing an EVAL scope, savestack=%"IVdf"..%"IVdf"\n", \ + (IV)lastcp, (IV)PL_savestack_ix) : 0); regcpblow(lastcp) STATIC char * S_regcppop(pTHX) @@ -186,8 +186,8 @@ S_regcppop(pTHX) DEBUG_r( if (*PL_reglastparen + 1 <= PL_regnpar) { PerlIO_printf(Perl_debug_log, - " restoring \\%d..\\%d to undef\n", - *PL_reglastparen + 1, PL_regnpar); + " restoring \\%"IVdf"..\\%"IVdf" to undef\n", + (IV)(*PL_reglastparen + 1), (IV)PL_regnpar); } ); for (paren = *PL_reglastparen + 1; paren <= PL_regnpar; paren++) { @@ -275,6 +275,13 @@ S_cache_re(pTHX_ regexp *prog) /* XXXX We assume that strpos is strbeg unless sv. */ +/* XXXX Some places assume that there is a fixed substring. + An update may be needed if optimizer marks as "INTUITable" + RExen without fixed substrings. Similarly, it is assumed that + lengths of all the strings are no more than minlen, thus they + cannot come from lookahead. + (Or minlen should take into account lookahead.) */ + /* A failure to find a constant substring means that there is no need to make an expensive call to REx engine, thus we celebrate a failure. Similarly, finding a substring too deep into the string means that less calls to @@ -285,10 +292,14 @@ S_cache_re(pTHX_ regexp *prog) b) Fixed substring; c) Whether we are anchored (beginning-of-line or \G); d) First node (of those at offset 0) which may distingush positions; - We use 'a', 'b', multiline-part of 'c', and try to find a position in the + We use a)b)d) and multiline-part of c), and try to find a position in the string which does not contradict any of them. */ +/* Most of decisions we do here should have been done at compile time. + The nodes of the REx which we used for the search should have been + deleted from the finite automaton. */ + char * Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, char *strend, U32 flags, re_scream_pos_data *data) @@ -301,7 +312,8 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, char *t; I32 ml_anch; char *tmp; - register char *other_last = Nullch; + register char *other_last = Nullch; /* other substr checked before this */ + char *check_at; /* check substr found at this pos */ #ifdef DEBUGGING char *i_strpos = strpos; #endif @@ -323,6 +335,7 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, DEBUG_r(PerlIO_printf(Perl_debug_log, "String too short...\n")); goto fail; } + check = prog->check_substr; if (prog->reganch & ROPT_ANCH) { /* Match at beg-of-str or after \n */ ml_anch = !( (prog->reganch & ROPT_ANCH_SINGLE) || ( (prog->reganch & ROPT_ANCH_BOL) @@ -339,8 +352,8 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, } PL_regeol = strend; /* Used in HOP() */ s = HOPc(strpos, prog->check_offset_min); - if (SvTAIL(prog->check_substr)) { - slen = SvCUR(prog->check_substr); /* >= 1 */ + if (SvTAIL(check)) { + slen = SvCUR(check); /* >= 1 */ if ( strend - s > slen || strend - s < slen - 1 || (strend - s == slen && strend[-1] != '\n')) { @@ -349,29 +362,28 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, } /* Now should match s[0..slen-2] */ slen--; - if (slen && (*SvPVX(prog->check_substr) != *s + if (slen && (*SvPVX(check) != *s || (slen > 1 - && memNE(SvPVX(prog->check_substr), s, slen)))) { + && memNE(SvPVX(check), s, slen)))) { report_neq: DEBUG_r(PerlIO_printf(Perl_debug_log, "String not equal...\n")); goto fail_finish; } } - else if (*SvPVX(prog->check_substr) != *s - || ((slen = SvCUR(prog->check_substr)) > 1 - && memNE(SvPVX(prog->check_substr), s, slen))) + else if (*SvPVX(check) != *s + || ((slen = SvCUR(check)) > 1 + && memNE(SvPVX(check), s, slen))) goto report_neq; goto success_at_start; } /* Match is anchored, but substr is not anchored wrt beg-of-str. */ s = strpos; start_shift = prog->check_offset_min; /* okay to underestimate on CC */ - /* Should be nonnegative! */ end_shift = prog->minlen - start_shift - - CHR_SVLEN(prog->check_substr) + (SvTAIL(prog->check_substr) != 0); + CHR_SVLEN(check) + (SvTAIL(check) != 0); if (!ml_anch) { - I32 end = prog->check_offset_max + CHR_SVLEN(prog->check_substr) - - (SvTAIL(prog->check_substr) != 0); + I32 end = prog->check_offset_max + CHR_SVLEN(check) + - (SvTAIL(check) != 0); I32 eshift = strend - s - end; if (end_shift < eshift) @@ -384,7 +396,7 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, start_shift = prog->check_offset_min; /* okay to underestimate on CC */ /* Should be nonnegative! */ end_shift = prog->minlen - start_shift - - CHR_SVLEN(prog->check_substr) + (SvTAIL(prog->check_substr) != 0); + CHR_SVLEN(check) + (SvTAIL(check) != 0); } #ifdef DEBUGGING /* 7/99: reports of failure (with the older version) */ @@ -392,7 +404,6 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, Perl_croak(aTHX_ "panic: end_shift"); #endif - check = prog->check_substr; restart: /* Find a possible match in the region s..strend by looking for the "check" substring in the region corrected by start/end_shift. */ @@ -432,6 +443,8 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, if (!s) goto fail_finish; + check_at = s; + /* Finish the diagnostic message */ DEBUG_r(PerlIO_printf(Perl_debug_log, "%ld...\n", (long)(s - i_strpos)) ); @@ -447,7 +460,7 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, /* Take into account the "other" substring. */ /* XXXX May be hopelessly wrong for UTF... */ if (!other_last) - other_last = strpos - 1; + other_last = strpos; if (check == prog->float_substr) { do_other_anchored: { @@ -465,8 +478,8 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, else t = strpos; t += prog->anchored_offset; - if (t <= other_last) - t = other_last + 1; + if (t < other_last) /* These positions already checked */ + t = other_last; PL_bostr = tmp; last2 = last1 = strend - prog->minlen; if (last < last1) @@ -495,7 +508,7 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, ", trying floating at offset %ld...\n", (long)(s1 + 1 - i_strpos))); PL_regeol = strend; /* Used in HOP() */ - other_last = last1 + prog->anchored_offset; + other_last = last1 + prog->anchored_offset + 1; s = HOPc(last, 1); goto restart; } @@ -503,7 +516,7 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, DEBUG_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", (long)(s - i_strpos))); t = s - prog->anchored_offset; - other_last = s - 1; + other_last = s + 1; s = s1; if (t == strpos) goto try_at_start; @@ -520,8 +533,8 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, if (last - t > prog->float_max_offset) last = t + prog->float_max_offset; s = t + prog->float_min_offset; - if (s <= other_last) - s = other_last + 1; + if (s < other_last) + s = other_last; /* XXXX It is not documented what units *_offsets are in. Assume bytes. */ /* fbm_instr() takes into account exact value of end-of-str if the check is SvTAIL(ed). Since false positives are OK, @@ -546,7 +559,7 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, DEBUG_r(PerlIO_printf(Perl_debug_log, ", trying anchored starting at offset %ld...\n", (long)(s1 + 1 - i_strpos))); - other_last = last; + other_last = last + 1; PL_regeol = strend; /* Used in HOP() */ s = HOPc(t, 1); goto restart; @@ -554,7 +567,7 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, else { DEBUG_r(PerlIO_printf(Perl_debug_log, " at offset %ld...\n", (long)(s - i_strpos))); - other_last = s - 1; + other_last = s + 1; s = s1; if (t == strpos) goto try_at_start; @@ -626,7 +639,10 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, /* Even in this situation we may use MBOL flag if strpos is offset wrt the start of the string. */ if (ml_anch && sv - && (strpos + SvCUR(sv) != strend) && strpos[-1] != '\n') { + && (strpos + SvCUR(sv) != strend) && strpos[-1] != '\n' + /* May be due to an implicit anchor of m{.*foo} */ + && !(prog->reganch & ROPT_IMPLICIT)) + { t = strpos; goto find_anchor; } @@ -636,303 +652,147 @@ Perl_re_intuit_start(pTHX_ regexp *prog, SV *sv, char *strpos, ); success_at_start: if (!(prog->reganch & ROPT_NAUGHTY) /* XXXX If strpos moved? */ + && prog->check_substr /* Could be deleted already */ && --BmUSEFUL(prog->check_substr) < 0 - && prog->check_substr == prog->float_substr) { /* boo */ + && prog->check_substr == prog->float_substr) + { /* If flags & SOMETHING - do not do it many times on the same match */ SvREFCNT_dec(prog->check_substr); prog->check_substr = Nullsv; /* disable */ prog->float_substr = Nullsv; /* clear */ s = strpos; + /* XXXX This is a remnant of the old implementation. It + looks wasteful, since now INTUIT can use many + other heuristics. */ prog->reganch &= ~RE_USE_INTUIT; } else s = strpos; } + /* Last resort... */ + /* XXXX BmUSEFUL already changed, maybe multiple change is meaningful... */ + if (prog->regstclass) { + /* minlen == 0 is possible if regstclass is \b or \B, + and the fixed substr is ''$. + Since minlen is already taken into account, s+1 is before strend; + accidentally, minlen >= 1 guaranties no false positives at s + 1 + even for \b or \B. But (minlen? 1 : 0) below assumes that + regstclass does not come from lookahead... */ + /* If regstclass takes bytelength more than 1: If charlength==1, OK. + This leaves EXACTF only, which is dealt with in find_byclass(). */ + int cl_l = (PL_regkind[(U8)OP(prog->regstclass)] == EXACT + ? STR_LEN(prog->regstclass) + : 1); + char *endpos = (prog->anchored_substr || ml_anch) + ? s + (prog->minlen? cl_l : 0) + : (prog->float_substr ? check_at - start_shift + cl_l + : strend) ; + char *startpos = sv && SvPOK(sv) ? strend - SvCUR(sv) : s; + + t = s; + if (prog->reganch & ROPT_UTF8) { + PL_regdata = prog->data; /* Used by REGINCLASS UTF logic */ + PL_bostr = startpos; + } + s = find_byclass(prog, prog->regstclass, s, endpos, startpos, 1); + if (!s) { +#ifdef DEBUGGING + char *what; +#endif + if (endpos == strend) { + DEBUG_r( PerlIO_printf(Perl_debug_log, + "Could not match STCLASS...\n") ); + goto fail; + } + DEBUG_r( PerlIO_printf(Perl_debug_log, + "This position contradicts STCLASS...\n") ); + if ((prog->reganch & ROPT_ANCH) && !ml_anch) + goto fail; + /* Contradict one of substrings */ + if (prog->anchored_substr) { + if (prog->anchored_substr == check) { + DEBUG_r( what = "anchored" ); + hop_and_restart: + PL_regeol = strend; /* Used in HOP() */ + s = HOPc(t, 1); + if (s + start_shift + end_shift > strend) { + /* XXXX Should be taken into account earlier? */ + DEBUG_r( PerlIO_printf(Perl_debug_log, + "Could not match STCLASS...\n") ); + goto fail; + } + DEBUG_r( PerlIO_printf(Perl_debug_log, + "Trying %s substr starting at offset %ld...\n", + what, (long)(s + start_shift - i_strpos)) ); + goto restart; + } + /* Have both, check_string is floating */ + if (t + start_shift >= check_at) /* Contradicts floating=check */ + goto retry_floating_check; + /* Recheck anchored substring, but not floating... */ + s = check_at; + DEBUG_r( PerlIO_printf(Perl_debug_log, + "Trying anchored substr starting at offset %ld...\n", + (long)(other_last - i_strpos)) ); + goto do_other_anchored; + } + /* Another way we could have checked stclass at the + current position only: */ + if (ml_anch) { + s = t = t + 1; + DEBUG_r( PerlIO_printf(Perl_debug_log, + "Trying /^/m starting at offset %ld...\n", + (long)(t - i_strpos)) ); + goto try_at_offset; + } + if (!prog->float_substr) /* Could have been deleted */ + goto fail; + /* Check is floating subtring. */ + retry_floating_check: + t = check_at - start_shift; + DEBUG_r( what = "floating" ); + goto hop_and_restart; + } + DEBUG_r( if (t != s) + PerlIO_printf(Perl_debug_log, + "By STCLASS: moving %ld --> %ld\n", + (long)(t - i_strpos), (long)(s - i_strpos)); + else + PerlIO_printf(Perl_debug_log, + "Does not contradict STCLASS...\n") ); + } DEBUG_r(PerlIO_printf(Perl_debug_log, "%sGuessed:%s match at offset %ld\n", PL_colors[4], PL_colors[5], (long)(s - i_strpos)) ); return s; fail_finish: /* Substring not found */ - BmUSEFUL(prog->check_substr) += 5; /* hooray */ + if (prog->check_substr) /* could be removed already */ + BmUSEFUL(prog->check_substr) += 5; /* hooray */ fail: DEBUG_r(PerlIO_printf(Perl_debug_log, "%sMatch rejected by optimizer%s\n", PL_colors[4],PL_colors[5])); return Nullch; } -/* - - regexec_flags - match a regexp against a string - */ -I32 -Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char *strend, - char *strbeg, I32 minend, SV *sv, void *data, U32 flags) -/* strend: pointer to null at end of string */ -/* strbeg: real beginning of string */ -/* minend: end of match must be >=minend after stringarg. */ -/* data: May be used for some additional optimizations. */ -/* nosave: For optimizations. */ +/* We know what class REx starts with. Try to find this position... */ +STATIC char * +S_find_byclass(pTHX_ regexp * prog, regnode *c, char *s, char *strend, char *startpos, I32 norun) { - dTHR; - register char *s; - register regnode *c; - register char *startpos = stringarg; - register I32 tmp; - I32 minlen; /* must match at least this many chars */ - I32 dontbother = 0; /* how many characters not to try at end */ - I32 start_shift = 0; /* Offset of the start to find - constant substr. */ /* CC */ - I32 end_shift = 0; /* Same for the end. */ /* CC */ - I32 scream_pos = -1; /* Internal iterator of scream. */ - char *scream_olds; - SV* oreplsv = GvSV(PL_replgv); - - PL_regcc = 0; - - cache_re(prog); -#ifdef DEBUGGING - PL_regnarrate = PL_debug & 512; -#endif - - /* Be paranoid... */ - if (prog == NULL || startpos == NULL) { - Perl_croak(aTHX_ "NULL regexp parameter"); - return 0; - } - - minlen = prog->minlen; - if (strend - startpos < minlen) goto phooey; - - if (startpos == strbeg) /* is ^ valid at stringarg? */ - PL_regprev = '\n'; - else { - PL_regprev = (U32)stringarg[-1]; - if (!PL_multiline && PL_regprev == '\n') - PL_regprev = '\0'; /* force ^ to NOT match */ - } - - /* Check validity of program. */ - if (UCHARAT(prog->program) != REG_MAGIC) { - Perl_croak(aTHX_ "corrupted regexp program"); - } - - PL_reg_flags = 0; - PL_reg_eval_set = 0; - PL_reg_maxiter = 0; - - if (prog->reganch & ROPT_UTF8) - PL_reg_flags |= RF_utf8; - - /* Mark beginning of line for ^ and lookbehind. */ - PL_regbol = startpos; - PL_bostr = strbeg; - PL_reg_sv = sv; - - /* Mark end of line for $ (and such) */ - PL_regeol = strend; - - /* see how far we have to get to not match where we matched before */ - PL_regtill = startpos+minend; - - /* We start without call_cc context. */ - PL_reg_call_cc = 0; - - /* If there is a "must appear" string, look for it. */ - s = startpos; - - if (prog->reganch & ROPT_GPOS_SEEN) { /* Need to have PL_reg_ganch */ - MAGIC *mg; - - if (flags & REXEC_IGNOREPOS) /* Means: check only at start */ - PL_reg_ganch = startpos; - else if (sv && SvTYPE(sv) >= SVt_PVMG - && SvMAGIC(sv) - && (mg = mg_find(sv, 'g')) && mg->mg_len >= 0) { - PL_reg_ganch = strbeg + mg->mg_len; /* Defined pos() */ - if (prog->reganch & ROPT_ANCH_GPOS) { - if (s > PL_reg_ganch) - goto phooey; - s = PL_reg_ganch; - } - } - else /* pos() not defined */ - PL_reg_ganch = strbeg; - } - - if (!(flags & REXEC_CHECKED) && prog->check_substr != Nullsv) { - re_scream_pos_data d; - - d.scream_olds = &scream_olds; - d.scream_pos = &scream_pos; - s = re_intuit_start(prog, sv, s, strend, flags, &d); - if (!s) - goto phooey; /* not present */ - } - - DEBUG_r( if (!PL_colorset) reginitcolors() ); - DEBUG_r(PerlIO_printf(Perl_debug_log, - "%sMatching REx%s `%s%.60s%s%s' against `%s%.*s%s%s'\n", - PL_colors[4],PL_colors[5],PL_colors[0], - prog->precomp, - PL_colors[1], - (strlen(prog->precomp) > 60 ? "..." : ""), - PL_colors[0], - (int)(strend - startpos > 60 ? 60 : strend - startpos), - startpos, PL_colors[1], - (strend - startpos > 60 ? "..." : "")) - ); - - /* Simplest case: anchored match need be tried only once. */ - /* [unless only anchor is BOL and multiline is set] */ - if (prog->reganch & (ROPT_ANCH & ~ROPT_ANCH_GPOS)) { - if (s == startpos && regtry(prog, startpos)) - goto got_it; - else if (PL_multiline || (prog->reganch & ROPT_IMPLICIT) - || (prog->reganch & ROPT_ANCH_MBOL)) /* XXXX SBOL? */ - { - char *end; - - if (minlen) - dontbother = minlen - 1; - end = HOPc(strend, -dontbother) - 1; - /* for multiline we only have to try after newlines */ - if (prog->check_substr) { - if (s == startpos) - goto after_try; - while (1) { - if (regtry(prog, s)) - goto got_it; - after_try: - if (s >= end) - goto phooey; - s = re_intuit_start(prog, sv, s + 1, strend, flags, NULL); - if (!s) - goto phooey; - } - } else { - if (s > startpos) - s--; - while (s < end) { - if (*s++ == '\n') { /* don't need PL_utf8skip here */ - if (regtry(prog, s)) - goto got_it; - } - } - } - } - goto phooey; - } else if (prog->reganch & ROPT_ANCH_GPOS) { - if (regtry(prog, PL_reg_ganch)) - goto got_it; - goto phooey; - } - - /* Messy cases: unanchored match. */ - if (prog->anchored_substr && prog->reganch & ROPT_SKIP) { - /* we have /x+whatever/ */ - /* it must be a one character string (XXXX Except UTF?) */ - char ch = SvPVX(prog->anchored_substr)[0]; - if (UTF) { - while (s < strend) { - if (*s == ch) { - if (regtry(prog, s)) goto got_it; - s += UTF8SKIP(s); - while (s < strend && *s == ch) - s += UTF8SKIP(s); - } - s += UTF8SKIP(s); - } - } - else { - while (s < strend) { - if (*s == ch) { - if (regtry(prog, s)) goto got_it; - s++; - while (s < strend && *s == ch) - s++; - } - s++; - } - } - } - /*SUPPRESS 560*/ - else if (prog->anchored_substr != Nullsv - || (prog->float_substr != Nullsv - && prog->float_max_offset < strend - s)) { - SV *must = prog->anchored_substr - ? prog->anchored_substr : prog->float_substr; - I32 back_max = - prog->anchored_substr ? prog->anchored_offset : prog->float_max_offset; - I32 back_min = - prog->anchored_substr ? prog->anchored_offset : prog->float_min_offset; - I32 delta = back_max - back_min; - char *last = HOPc(strend, /* Cannot start after this */ - -(I32)(CHR_SVLEN(must) - - (SvTAIL(must) != 0) + back_min)); - char *last1; /* Last position checked before */ - - if (s > PL_bostr) - last1 = HOPc(s, -1); - else - last1 = s - 1; /* bogus */ - - /* XXXX check_substr already used to find `s', can optimize if - check_substr==must. */ - scream_pos = -1; - dontbother = end_shift; - strend = HOPc(strend, -dontbother); - while ( (s <= last) && - ((flags & REXEC_SCREAM) - ? (s = screaminstr(sv, must, HOPc(s, back_min) - strbeg, - end_shift, &scream_pos, 0)) - : (s = fbm_instr((unsigned char*)HOP(s, back_min), - (unsigned char*)strend, must, - PL_multiline ? FBMrf_MULTILINE : 0))) ) { - if (HOPc(s, -back_max) > last1) { - last1 = HOPc(s, -back_min); - s = HOPc(s, -back_max); - } - else { - char *t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1; - - last1 = HOPc(s, -back_min); - s = t; - } - if (UTF) { - while (s <= last1) { - if (regtry(prog, s)) - goto got_it; - s += UTF8SKIP(s); - } - } - else { - while (s <= last1) { - if (regtry(prog, s)) - goto got_it; - s++; - } - } - } - goto phooey; - } - else if (c = prog->regstclass) { I32 doevery = (prog->reganch & ROPT_SKIP) == 0; char *m; - int ln; - int c1; - int c2; + STRLEN ln; + unsigned int c1; + unsigned int c2; char *e; + register I32 tmp = 1; /* Scratch variable? */ - if (minlen) - dontbother = minlen - 1; - strend = HOPc(strend, -dontbother); /* don't bother with what can't match */ - tmp = 1; /* We know what class it must start with. */ switch (OP(c)) { case ANYOFUTF8: while (s < strend) { if (REGINCLASSUTF8(c, (U8*)s)) { - if (tmp && regtry(prog, s)) + if (tmp && (norun || regtry(prog, s))) goto got_it; else tmp = doevery; @@ -944,8 +804,8 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * break; case ANYOF: while (s < strend) { - if (REGINCLASS(c, *s)) { - if (tmp && regtry(prog, s)) + if (REGINCLASS(c, *(U8*)s)) { + if (tmp && (norun || regtry(prog, s))) goto got_it; else tmp = doevery; @@ -958,35 +818,37 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * case EXACTF: m = STRING(c); ln = STR_LEN(c); - c1 = *m; + c1 = *(U8*)m; c2 = PL_fold[c1]; goto do_exactf; case EXACTFL: m = STRING(c); ln = STR_LEN(c); - c1 = *m; + c1 = *(U8*)m; c2 = PL_fold_locale[c1]; do_exactf: e = strend - ln; + if (norun && e < s) + e = s; /* Due to minlen logic of intuit() */ /* Here it is NOT UTF! */ if (c1 == c2) { while (s <= e) { - if ( *s == c1 - && (ln == 1 || (OP(c) == EXACTF - ? ibcmp(s, m, ln) - : ibcmp_locale(s, m, ln))) - && regtry(prog, s) ) + if ( *(U8*)s == c1 + && (ln == 1 || !(OP(c) == EXACTF + ? ibcmp(s, m, ln) + : ibcmp_locale(s, m, ln))) + && (norun || regtry(prog, s)) ) goto got_it; s++; } } else { while (s <= e) { - if ( (*s == c1 || *s == c2) - && (ln == 1 || (OP(c) == EXACTF - ? ibcmp(s, m, ln) - : ibcmp_locale(s, m, ln))) - && regtry(prog, s) ) + if ( (*(U8*)s == c1 || *(U8*)s == c2) + && (ln == 1 || !(OP(c) == EXACTF + ? ibcmp(s, m, ln) + : ibcmp_locale(s, m, ln))) + && (norun || regtry(prog, s)) ) goto got_it; s++; } @@ -996,93 +858,77 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * PL_reg_flags |= RF_tainted; /* FALL THROUGH */ case BOUND: - if (minlen) { - dontbother++; - strend -= 1; - } - tmp = (s != startpos) ? UCHARAT(s - 1) : PL_regprev; + tmp = (s != startpos) ? UCHARAT(s - 1) : '\n'; tmp = ((OP(c) == BOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0); while (s < strend) { if (tmp == !(OP(c) == BOUND ? isALNUM(*s) : isALNUM_LC(*s))) { tmp = !tmp; - if (regtry(prog, s)) + if ((norun || regtry(prog, s))) goto got_it; } s++; } - if ((minlen || tmp) && regtry(prog,s)) + if ((!prog->minlen && tmp) && (norun || regtry(prog, s))) goto got_it; break; case BOUNDLUTF8: PL_reg_flags |= RF_tainted; /* FALL THROUGH */ case BOUNDUTF8: - if (minlen) { - dontbother++; - strend = reghop_c(strend, -1); - } - tmp = (I32)(s != startpos) ? utf8_to_uv(reghop((U8*)s, -1), 0) : PL_regprev; - tmp = ((OP(c) == BOUND ? isALNUM_uni(tmp) : isALNUM_LC_uni(tmp)) != 0); + tmp = (I32)(s != startpos) ? utf8_to_uv(reghop((U8*)s, -1), 0) : '\n'; + tmp = ((OP(c) == BOUNDUTF8 ? isALNUM_uni(tmp) : isALNUM_LC_uni(tmp)) != 0); while (s < strend) { - if (tmp == !(OP(c) == BOUND ? + if (tmp == !(OP(c) == BOUNDUTF8 ? swash_fetch(PL_utf8_alnum, (U8*)s) : isALNUM_LC_utf8((U8*)s))) { tmp = !tmp; - if (regtry(prog, s)) + if ((norun || regtry(prog, s))) goto got_it; } s += UTF8SKIP(s); } - if ((minlen || tmp) && regtry(prog,s)) + if ((!prog->minlen && tmp) && (norun || regtry(prog, s))) goto got_it; break; case NBOUNDL: PL_reg_flags |= RF_tainted; /* FALL THROUGH */ case NBOUND: - if (minlen) { - dontbother++; - strend -= 1; - } - tmp = (s != startpos) ? UCHARAT(s - 1) : PL_regprev; + tmp = (s != startpos) ? UCHARAT(s - 1) : '\n'; tmp = ((OP(c) == NBOUND ? isALNUM(tmp) : isALNUM_LC(tmp)) != 0); while (s < strend) { if (tmp == !(OP(c) == NBOUND ? isALNUM(*s) : isALNUM_LC(*s))) tmp = !tmp; - else if (regtry(prog, s)) + else if ((norun || regtry(prog, s))) goto got_it; s++; } - if ((minlen || !tmp) && regtry(prog,s)) + if ((!prog->minlen && !tmp) && (norun || regtry(prog, s))) goto got_it; break; case NBOUNDLUTF8: PL_reg_flags |= RF_tainted; /* FALL THROUGH */ case NBOUNDUTF8: - if (minlen) { - dontbother++; - strend = reghop_c(strend, -1); - } - tmp = (I32)(s != startpos) ? utf8_to_uv(reghop((U8*)s, -1), 0) : PL_regprev; - tmp = ((OP(c) == NBOUND ? isALNUM_uni(tmp) : isALNUM_LC_uni(tmp)) != 0); + tmp = (I32)(s != startpos) ? utf8_to_uv(reghop((U8*)s, -1), 0) : '\n'; + tmp = ((OP(c) == NBOUNDUTF8 ? isALNUM_uni(tmp) : isALNUM_LC_uni(tmp)) != 0); while (s < strend) { - if (tmp == !(OP(c) == NBOUND ? + if (tmp == !(OP(c) == NBOUNDUTF8 ? swash_fetch(PL_utf8_alnum, (U8*)s) : isALNUM_LC_utf8((U8*)s))) tmp = !tmp; - else if (regtry(prog, s)) + else if ((norun || regtry(prog, s))) goto got_it; s += UTF8SKIP(s); } - if ((minlen || !tmp) && regtry(prog,s)) + if ((!prog->minlen && !tmp) && (norun || regtry(prog, s))) goto got_it; break; case ALNUM: while (s < strend) { if (isALNUM(*s)) { - if (tmp && regtry(prog, s)) + if (tmp && (norun || regtry(prog, s))) goto got_it; else tmp = doevery; @@ -1095,7 +941,7 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * case ALNUMUTF8: while (s < strend) { if (swash_fetch(PL_utf8_alnum, (U8*)s)) { - if (tmp && regtry(prog, s)) + if (tmp && (norun || regtry(prog, s))) goto got_it; else tmp = doevery; @@ -1109,7 +955,7 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * PL_reg_flags |= RF_tainted; while (s < strend) { if (isALNUM_LC(*s)) { - if (tmp && regtry(prog, s)) + if (tmp && (norun || regtry(prog, s))) goto got_it; else tmp = doevery; @@ -1123,7 +969,7 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * PL_reg_flags |= RF_tainted; while (s < strend) { if (isALNUM_LC_utf8((U8*)s)) { - if (tmp && regtry(prog, s)) + if (tmp && (norun || regtry(prog, s))) goto got_it; else tmp = doevery; @@ -1136,7 +982,7 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * case NALNUM: while (s < strend) { if (!isALNUM(*s)) { - if (tmp && regtry(prog, s)) + if (tmp && (norun || regtry(prog, s))) goto got_it; else tmp = doevery; @@ -1149,7 +995,7 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * case NALNUMUTF8: while (s < strend) { if (!swash_fetch(PL_utf8_alnum, (U8*)s)) { - if (tmp && regtry(prog, s)) + if (tmp && (norun || regtry(prog, s))) goto got_it; else tmp = doevery; @@ -1163,7 +1009,7 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * PL_reg_flags |= RF_tainted; while (s < strend) { if (!isALNUM_LC(*s)) { - if (tmp && regtry(prog, s)) + if (tmp && (norun || regtry(prog, s))) goto got_it; else tmp = doevery; @@ -1177,7 +1023,7 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * PL_reg_flags |= RF_tainted; while (s < strend) { if (!isALNUM_LC_utf8((U8*)s)) { - if (tmp && regtry(prog, s)) + if (tmp && (norun || regtry(prog, s))) goto got_it; else tmp = doevery; @@ -1190,7 +1036,7 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * case SPACE: while (s < strend) { if (isSPACE(*s)) { - if (tmp && regtry(prog, s)) + if (tmp && (norun || regtry(prog, s))) goto got_it; else tmp = doevery; @@ -1203,7 +1049,7 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * case SPACEUTF8: while (s < strend) { if (*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s)) { - if (tmp && regtry(prog, s)) + if (tmp && (norun || regtry(prog, s))) goto got_it; else tmp = doevery; @@ -1217,7 +1063,7 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * PL_reg_flags |= RF_tainted; while (s < strend) { if (isSPACE_LC(*s)) { - if (tmp && regtry(prog, s)) + if (tmp && (norun || regtry(prog, s))) goto got_it; else tmp = doevery; @@ -1231,7 +1077,7 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * PL_reg_flags |= RF_tainted; while (s < strend) { if (*s == ' ' || isSPACE_LC_utf8((U8*)s)) { - if (tmp && regtry(prog, s)) + if (tmp && (norun || regtry(prog, s))) goto got_it; else tmp = doevery; @@ -1244,7 +1090,7 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * case NSPACE: while (s < strend) { if (!isSPACE(*s)) { - if (tmp && regtry(prog, s)) + if (tmp && (norun || regtry(prog, s))) goto got_it; else tmp = doevery; @@ -1257,7 +1103,7 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * case NSPACEUTF8: while (s < strend) { if (!(*s == ' ' || swash_fetch(PL_utf8_space,(U8*)s))) { - if (tmp && regtry(prog, s)) + if (tmp && (norun || regtry(prog, s))) goto got_it; else tmp = doevery; @@ -1271,7 +1117,7 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * PL_reg_flags |= RF_tainted; while (s < strend) { if (!isSPACE_LC(*s)) { - if (tmp && regtry(prog, s)) + if (tmp && (norun || regtry(prog, s))) goto got_it; else tmp = doevery; @@ -1285,7 +1131,87 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * PL_reg_flags |= RF_tainted; while (s < strend) { if (!(*s == ' ' || isSPACE_LC_utf8((U8*)s))) { - if (tmp && regtry(prog, s)) + if (tmp && (norun || regtry(prog, s))) + goto got_it; + else + tmp = doevery; + } + else + tmp = 1; + s += UTF8SKIP(s); + } + break; + case DIGIT: + while (s < strend) { + if (isDIGIT(*s)) { + if (tmp && (norun || regtry(prog, s))) + goto got_it; + else + tmp = doevery; + } + else + tmp = 1; + s++; + } + break; + case DIGITUTF8: + while (s < strend) { + if (swash_fetch(PL_utf8_digit,(U8*)s)) { + if (tmp && (norun || regtry(prog, s))) + goto got_it; + else + tmp = doevery; + } + else + tmp = 1; + s += UTF8SKIP(s); + } + break; + case DIGITL: + PL_reg_flags |= RF_tainted; + while (s < strend) { + if (isDIGIT_LC(*s)) { + if (tmp && (norun || regtry(prog, s))) + goto got_it; + else + tmp = doevery; + } + else + tmp = 1; + s++; + } + break; + case DIGITLUTF8: + PL_reg_flags |= RF_tainted; + while (s < strend) { + if (isDIGIT_LC_utf8((U8*)s)) { + if (tmp && (norun || regtry(prog, s))) + goto got_it; + else + tmp = doevery; + } + else + tmp = 1; + s += UTF8SKIP(s); + } + break; + case NDIGIT: + while (s < strend) { + if (!isDIGIT(*s)) { + if (tmp && (norun || regtry(prog, s))) + goto got_it; + else + tmp = doevery; + } + else + tmp = 1; + s++; + } + break; + case NDIGITUTF8: + while (s < strend) { + if (!swash_fetch(PL_utf8_digit,(U8*)s)) { + if (tmp && (norun || regtry(prog, s))) goto got_it; else tmp = doevery; @@ -1294,125 +1220,311 @@ Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char * tmp = 1; s += UTF8SKIP(s); } - break; - case DIGIT: - while (s < strend) { - if (isDIGIT(*s)) { - if (tmp && regtry(prog, s)) + break; + case NDIGITL: + PL_reg_flags |= RF_tainted; + while (s < strend) { + if (!isDIGIT_LC(*s)) { + if (tmp && (norun || regtry(prog, s))) + goto got_it; + else + tmp = doevery; + } + else + tmp = 1; + s++; + } + break; + case NDIGITLUTF8: + PL_reg_flags |= RF_tainted; + while (s < strend) { + if (!isDIGIT_LC_utf8((U8*)s)) { + if (tmp && (norun || regtry(prog, s))) + goto got_it; + else + tmp = doevery; + } + else + tmp = 1; + s += UTF8SKIP(s); + } + break; + default: + Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c)); + break; + } + return 0; + got_it: + return s; +} + +/* + - regexec_flags - match a regexp against a string + */ +I32 +Perl_regexec_flags(pTHX_ register regexp *prog, char *stringarg, register char *strend, + char *strbeg, I32 minend, SV *sv, void *data, U32 flags) +/* strend: pointer to null at end of string */ +/* strbeg: real beginning of string */ +/* minend: end of match must be >=minend after stringarg. */ +/* data: May be used for some additional optimizations. */ +/* nosave: For optimizations. */ +{ + dTHR; + register char *s; + register regnode *c; + register char *startpos = stringarg; + I32 minlen; /* must match at least this many chars */ + I32 dontbother = 0; /* how many characters not to try at end */ + /* I32 start_shift = 0; */ /* Offset of the start to find + constant substr. */ /* CC */ + I32 end_shift = 0; /* Same for the end. */ /* CC */ + I32 scream_pos = -1; /* Internal iterator of scream. */ + char *scream_olds; + SV* oreplsv = GvSV(PL_replgv); + + PL_regcc = 0; + + cache_re(prog); +#ifdef DEBUGGING + PL_regnarrate = PL_debug & 512; +#endif + + /* Be paranoid... */ + if (prog == NULL || startpos == NULL) { + Perl_croak(aTHX_ "NULL regexp parameter"); + return 0; + } + + minlen = prog->minlen; + if (strend - startpos < minlen) goto phooey; + + if (startpos == strbeg) /* is ^ valid at stringarg? */ + PL_regprev = '\n'; + else { + PL_regprev = (U32)stringarg[-1]; + if (!PL_multiline && PL_regprev == '\n') + PL_regprev = '\0'; /* force ^ to NOT match */ + } + + /* Check validity of program. */ + if (UCHARAT(prog->program) != REG_MAGIC) { + Perl_croak(aTHX_ "corrupted regexp program"); + } + + PL_reg_flags = 0; + PL_reg_eval_set = 0; + PL_reg_maxiter = 0; + + if (prog->reganch & ROPT_UTF8) + PL_reg_flags |= RF_utf8; + + /* Mark beginning of line for ^ and lookbehind. */ + PL_regbol = startpos; + PL_bostr = strbeg; + PL_reg_sv = sv; + + /* Mark end of line for $ (and such) */ + PL_regeol = strend; + + /* see how far we have to get to not match where we matched before */ + PL_regtill = startpos+minend; + + /* We start without call_cc context. */ + PL_reg_call_cc = 0; + + /* If there is a "must appear" string, look for it. */ + s = startpos; + + if (prog->reganch & ROPT_GPOS_SEEN) { /* Need to have PL_reg_ganch */ + MAGIC *mg; + + if (flags & REXEC_IGNOREPOS) /* Means: check only at start */ + PL_reg_ganch = startpos; + else if (sv && SvTYPE(sv) >= SVt_PVMG + && SvMAGIC(sv) + && (mg = mg_find(sv, 'g')) && mg->mg_len >= 0) { + PL_reg_ganch = strbeg + mg->mg_len; /* Defined pos() */ + if (prog->reganch & ROPT_ANCH_GPOS) { + if (s > PL_reg_ganch) + goto phooey; + s = PL_reg_ganch; + } + } + else /* pos() not defined */ + PL_reg_ganch = strbeg; + } + + if (!(flags & REXEC_CHECKED) && prog->check_substr != Nullsv) { + re_scream_pos_data d; + + d.scream_olds = &scream_olds; + d.scream_pos = &scream_pos; + s = re_intuit_start(prog, sv, s, strend, flags, &d); + if (!s) + goto phooey; /* not present */ + } + + DEBUG_r( if (!PL_colorset) reginitcolors() ); + DEBUG_r(PerlIO_printf(Perl_debug_log, + "%sMatching REx%s `%s%.60s%s%s' against `%s%.*s%s%s'\n", + PL_colors[4],PL_colors[5],PL_colors[0], + prog->precomp, + PL_colors[1], + (strlen(prog->precomp) > 60 ? "..." : ""), + PL_colors[0], + (int)(strend - startpos > 60 ? 60 : strend - startpos), + startpos, PL_colors[1], + (strend - startpos > 60 ? "..." : "")) + ); + + /* Simplest case: anchored match need be tried only once. */ + /* [unless only anchor is BOL and multiline is set] */ + if (prog->reganch & (ROPT_ANCH & ~ROPT_ANCH_GPOS)) { + if (s == startpos && regtry(prog, startpos)) + goto got_it; + else if (PL_multiline || (prog->reganch & ROPT_IMPLICIT) + || (prog->reganch & ROPT_ANCH_MBOL)) /* XXXX SBOL? */ + { + char *end; + + if (minlen) + dontbother = minlen - 1; + end = HOPc(strend, -dontbother) - 1; + /* for multiline we only have to try after newlines */ + if (prog->check_substr) { + if (s == startpos) + goto after_try; + while (1) { + if (regtry(prog, s)) goto got_it; + after_try: + if (s >= end) + goto phooey; + if (prog->reganch & RE_USE_INTUIT) { + s = re_intuit_start(prog, sv, s + 1, strend, flags, NULL); + if (!s) + goto phooey; + } else - tmp = doevery; - } - else - tmp = 1; - s++; + s++; + } + } else { + if (s > startpos) + s--; + while (s < end) { + if (*s++ == '\n') { /* don't need PL_utf8skip here */ + if (regtry(prog, s)) + goto got_it; + } + } } - break; - case DIGITUTF8: + } + goto phooey; + } else if (prog->reganch & ROPT_ANCH_GPOS) { + if (regtry(prog, PL_reg_ganch)) + goto got_it; + goto phooey; + } + + /* Messy cases: unanchored match. */ + if (prog->anchored_substr && prog->reganch & ROPT_SKIP) { + /* we have /x+whatever/ */ + /* it must be a one character string (XXXX Except UTF?) */ + char ch = SvPVX(prog->anchored_substr)[0]; + if (UTF) { while (s < strend) { - if (swash_fetch(PL_utf8_digit,(U8*)s)) { - if (tmp && regtry(prog, s)) - goto got_it; - else - tmp = doevery; + if (*s == ch) { + if (regtry(prog, s)) goto got_it; + s += UTF8SKIP(s); + while (s < strend && *s == ch) + s += UTF8SKIP(s); } - else - tmp = 1; s += UTF8SKIP(s); } - break; - case DIGITL: - PL_reg_flags |= RF_tainted; + } + else { while (s < strend) { - if (isDIGIT_LC(*s)) { - if (tmp && regtry(prog, s)) - goto got_it; - else - tmp = doevery; + if (*s == ch) { + if (regtry(prog, s)) goto got_it; + s++; + while (s < strend && *s == ch) + s++; } - else - tmp = 1; s++; } - break; - case DIGITLUTF8: - PL_reg_flags |= RF_tainted; - while (s < strend) { - if (isDIGIT_LC_utf8((U8*)s)) { - if (tmp && regtry(prog, s)) - goto got_it; - else - tmp = doevery; - } - else - tmp = 1; - s += UTF8SKIP(s); - } - break; - case NDIGIT: - while (s < strend) { - if (!isDIGIT(*s)) { - if (tmp && regtry(prog, s)) - goto got_it; - else - tmp = doevery; - } - else - tmp = 1; - s++; + } + } + /*SUPPRESS 560*/ + else if (prog->anchored_substr != Nullsv + || (prog->float_substr != Nullsv + && prog->float_max_offset < strend - s)) { + SV *must = prog->anchored_substr + ? prog->anchored_substr : prog->float_substr; + I32 back_max = + prog->anchored_substr ? prog->anchored_offset : prog->float_max_offset; + I32 back_min = + prog->anchored_substr ? prog->anchored_offset : prog->float_min_offset; + char *last = HOPc(strend, /* Cannot start after this */ + -(I32)(CHR_SVLEN(must) + - (SvTAIL(must) != 0) + back_min)); + char *last1; /* Last position checked before */ + + if (s > PL_bostr) + last1 = HOPc(s, -1); + else + last1 = s - 1; /* bogus */ + + /* XXXX check_substr already used to find `s', can optimize if + check_substr==must. */ + scream_pos = -1; + dontbother = end_shift; + strend = HOPc(strend, -dontbother); + while ( (s <= last) && + ((flags & REXEC_SCREAM) + ? (s = screaminstr(sv, must, HOPc(s, back_min) - strbeg, + end_shift, &scream_pos, 0)) + : (s = fbm_instr((unsigned char*)HOP(s, back_min), + (unsigned char*)strend, must, + PL_multiline ? FBMrf_MULTILINE : 0))) ) { + if (HOPc(s, -back_max) > last1) { + last1 = HOPc(s, -back_min); + s = HOPc(s, -back_max); } - break; - case NDIGITUTF8: - while (s < strend) { - if (!swash_fetch(PL_utf8_digit,(U8*)s)) { - if (tmp && regtry(prog, s)) - goto got_it; - else - tmp = doevery; - } - else - tmp = 1; - s += UTF8SKIP(s); + else { + char *t = (last1 >= PL_bostr) ? HOPc(last1, 1) : last1 + 1; + + last1 = HOPc(s, -back_min); + s = t; } - break; - case NDIGITL: - PL_reg_flags |= RF_tainted; - while (s < strend) { - if (!isDIGIT_LC(*s)) { - if (tmp && regtry(prog, s)) + if (UTF) { + while (s <= last1) { + if (regtry(prog, s)) goto got_it; - else - tmp = doevery; + s += UTF8SKIP(s); } - else - tmp = 1; - s++; } - break; - case NDIGITLUTF8: - PL_reg_flags |= RF_tainted; - while (s < strend) { - if (!isDIGIT_LC_utf8((U8*)s)) { - if (tmp && regtry(prog, s)) + else { + while (s <= last1) { + if (regtry(prog, s)) goto got_it; - else - tmp = doevery; + s++; } - else - tmp = 1; - s += UTF8SKIP(s); } - break; - default: - Perl_croak(aTHX_ "panic: unknown regstclass %d", (int)OP(c)); - break; } + goto phooey; + } + else if ((c = prog->regstclass)) { + if (minlen && PL_regkind[(U8)OP(prog->regstclass)] != EXACT) + /* don't bother with what can't match */ + strend = HOPc(strend, -(minlen - 1)); + if (find_byclass(prog, c, s, strend, startpos, 0)) + goto got_it; } else { dontbother = 0; if (prog->float_substr != Nullsv) { /* Trim the end. */ char *last; - I32 oldpos = scream_pos; if (flags & REXEC_SCREAM) { last = screaminstr(sv, prog->float_substr, s - strbeg, @@ -1527,12 +1639,12 @@ S_regtry(pTHX_ regexp *prog, char *startpos) PerlIO_printf(Perl_debug_log, " setting stack tmpbase at %"IVdf"\n", (IV)(PL_stack_sp - PL_stack_base)); )); - SAVEINT(cxstack[cxstack_ix].blk_oldsp); + SAVEI32(cxstack[cxstack_ix].blk_oldsp); cxstack[cxstack_ix].blk_oldsp = PL_stack_sp - PL_stack_base; /* Otherwise OP_NEXTSTATE will free whatever on stack now. */ SAVETMPS; /* Apparently this is not needed, judging by wantarray. */ - /* SAVEINT(cxstack[cxstack_ix].blk_gimme); + /* SAVEI8(cxstack[cxstack_ix].blk_gimme); cxstack[cxstack_ix].blk_gimme = G_SCALAR; */ if (PL_reg_sv) { @@ -1555,7 +1667,7 @@ S_regtry(pTHX_ regexp *prog, char *startpos) SAVEDESTRUCTOR_X(restore_pos, 0); } if (!PL_reg_curpm) - New(22,PL_reg_curpm, 1, PMOP); + Newz(22,PL_reg_curpm, 1, PMOP); PL_reg_curpm->op_pmregexp = prog; PL_reg_oldcurpm = PL_curpm; PL_curpm = PL_reg_curpm; @@ -1779,12 +1891,12 @@ S_regmatch(pTHX_ regnode *prog) nextchr = UCHARAT(locinput); break; } - if (!nextchr && locinput >= PL_regeol || nextchr == '\n') + if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n') sayNO; nextchr = UCHARAT(++locinput); break; case REG_ANY: - if (!nextchr && locinput >= PL_regeol || nextchr == '\n') + if ((!nextchr && locinput >= PL_regeol) || nextchr == '\n') sayNO; nextchr = UCHARAT(++locinput); break; @@ -1969,7 +2081,7 @@ S_regmatch(pTHX_ regnode *prog) PL_reg_flags |= RF_tainted; /* FALL THROUGH */ case SPACE: - if (!nextchr && locinput >= PL_regeol) + if (!nextchr) sayNO; if (!(OP(scan) == SPACE ? isSPACE(nextchr) : isSPACE_LC(nextchr))) @@ -1980,11 +2092,11 @@ S_regmatch(pTHX_ regnode *prog) PL_reg_flags |= RF_tainted; /* FALL THROUGH */ case SPACEUTF8: - if (!nextchr && locinput >= PL_regeol) + if (!nextchr) sayNO; if (nextchr & 0x80) { if (!(OP(scan) == SPACEUTF8 - ? swash_fetch(PL_utf8_space,(U8*)locinput) + ? swash_fetch(PL_utf8_space, (U8*)locinput) : isSPACE_LC_utf8((U8*)locinput))) { sayNO; @@ -2002,9 +2114,9 @@ S_regmatch(pTHX_ regnode *prog) PL_reg_flags |= RF_tainted; /* FALL THROUGH */ case NSPACE: - if (!nextchr) + if (!nextchr && locinput >= PL_regeol) sayNO; - if (OP(scan) == SPACE + if (OP(scan) == NSPACE ? isSPACE(nextchr) : isSPACE_LC(nextchr)) sayNO; nextchr = UCHARAT(++locinput); @@ -2013,11 +2125,11 @@ S_regmatch(pTHX_ regnode *prog) PL_reg_flags |= RF_tainted; /* FALL THROUGH */ case NSPACEUTF8: - if (!nextchr) + if (!nextchr && locinput >= PL_regeol) sayNO; if (nextchr & 0x80) { if (OP(scan) == NSPACEUTF8 - ? swash_fetch(PL_utf8_space,(U8*)locinput) + ? swash_fetch(PL_utf8_space, (U8*)locinput) : isSPACE_LC_utf8((U8*)locinput)) { sayNO; @@ -2035,7 +2147,7 @@ S_regmatch(pTHX_ regnode *prog) PL_reg_flags |= RF_tainted; /* FALL THROUGH */ case DIGIT: - if (!nextchr && locinput >= PL_regeol) + if (!nextchr) sayNO; if (!(OP(scan) == DIGIT ? isDIGIT(nextchr) : isDIGIT_LC(nextchr))) @@ -2049,9 +2161,9 @@ S_regmatch(pTHX_ regnode *prog) if (!nextchr) sayNO; if (nextchr & 0x80) { - if (OP(scan) == NDIGITUTF8 - ? swash_fetch(PL_utf8_digit,(U8*)locinput) - : isDIGIT_LC_utf8((U8*)locinput)) + if (!(OP(scan) == DIGITUTF8 + ? swash_fetch(PL_utf8_digit, (U8*)locinput) + : isDIGIT_LC_utf8((U8*)locinput))) { sayNO; } @@ -2059,7 +2171,8 @@ S_regmatch(pTHX_ regnode *prog) nextchr = UCHARAT(locinput); break; } - if (!isDIGIT(nextchr)) + if (!(OP(scan) == DIGITUTF8 + ? isDIGIT(nextchr) : isDIGIT_LC(nextchr))) sayNO; nextchr = UCHARAT(++locinput); break; @@ -2067,9 +2180,9 @@ S_regmatch(pTHX_ regnode *prog) PL_reg_flags |= RF_tainted; /* FALL THROUGH */ case NDIGIT: - if (!nextchr) + if (!nextchr && locinput >= PL_regeol) sayNO; - if (OP(scan) == DIGIT + if (OP(scan) == NDIGIT ? isDIGIT(nextchr) : isDIGIT_LC(nextchr)) sayNO; nextchr = UCHARAT(++locinput); @@ -2081,13 +2194,18 @@ S_regmatch(pTHX_ regnode *prog) if (!nextchr && locinput >= PL_regeol) sayNO; if (nextchr & 0x80) { - if (swash_fetch(PL_utf8_digit,(U8*)locinput)) + if (OP(scan) == NDIGITUTF8 + ? swash_fetch(PL_utf8_digit, (U8*)locinput) + : isDIGIT_LC_utf8((U8*)locinput)) + { sayNO; + } locinput += PL_utf8skip[nextchr]; nextchr = UCHARAT(locinput); break; } - if (isDIGIT(nextchr)) + if (OP(scan) == NDIGITUTF8 + ? isDIGIT(nextchr) : isDIGIT_LC(nextchr)) sayNO; nextchr = UCHARAT(++locinput); break; @@ -2220,6 +2338,7 @@ S_regmatch(pTHX_ regnode *prog) I32 onpar = PL_regnpar; pm.op_pmflags = 0; + pm.op_pmdynflags = (UTF||DO_UTF8(ret) ? PMdf_UTF8 : 0); re = CALLREGCOMP(aTHX_ t, t + len, &pm); if (!(SvFLAGS(ret) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY))) @@ -2541,10 +2660,10 @@ S_regmatch(pTHX_ regnode *prog) PL_regcc = cc; if (n >= cc->max) { /* Maximum greed exceeded? */ - if (ckWARN(WARN_UNSAFE) && n >= REG_INFTY + if (ckWARN(WARN_REGEXP) && n >= REG_INFTY && !(PL_reg_flags & RF_warned)) { PL_reg_flags |= RF_warned; - Perl_warner(aTHX_ WARN_UNSAFE, "%s limit (%d) exceeded", + Perl_warner(aTHX_ WARN_REGEXP, "%s limit (%d) exceeded", "Complex regular subexpression recursion", REG_INFTY - 1); } @@ -2593,10 +2712,10 @@ S_regmatch(pTHX_ regnode *prog) REPORT_CODE_OFF+PL_regindent*2, "") ); } - if (ckWARN(WARN_UNSAFE) && n >= REG_INFTY + if (ckWARN(WARN_REGEXP) && n >= REG_INFTY && !(PL_reg_flags & RF_warned)) { PL_reg_flags |= RF_warned; - Perl_warner(aTHX_ WARN_UNSAFE, "%s limit (%d) exceeded", + Perl_warner(aTHX_ WARN_REGEXP, "%s limit (%d) exceeded", "Complex regular subexpression recursion", REG_INFTY - 1); } @@ -2643,7 +2762,7 @@ S_regmatch(pTHX_ regnode *prog) *PL_reglastparen = n; scan = next; /*SUPPRESS 560*/ - if (n = (c1 == BRANCH ? NEXT_OFF(next) : ARG(next))) + if ((n = (c1 == BRANCH ? NEXT_OFF(next) : ARG(next)))) next += n; else next = NULL; @@ -2745,9 +2864,9 @@ S_regmatch(pTHX_ regnode *prog) locinput = PL_reginput; DEBUG_r( PerlIO_printf(Perl_debug_log, - "%*s matched %d times, len=%"IVdf"...\n", + "%*s matched %"IVdf" times, len=%"IVdf"...\n", (int)(REPORT_CODE_OFF+PL_regindent*2), "", - n, (IV)l) + (IV) n, (IV)l) ); if (n >= ln) { if (PL_regkind[(U8)OP(next)] == EXACT) { @@ -2923,8 +3042,14 @@ S_regmatch(pTHX_ regnode *prog) n = regrepeat(scan, n); locinput = PL_reginput; if (ln < n && PL_regkind[(U8)OP(next)] == EOL && - (!PL_multiline || OP(next) == SEOL)) + (!PL_multiline || OP(next) == SEOL || OP(next) == EOS)) { ln = n; /* why back off? */ + /* ...because $ and \Z can match before *and* after + newline at the end. Consider "\n\n" =~ /\n+\Z\n/. + We should back off by one in this case. */ + if (UCHARAT(PL_reginput - 1) == '\n' && OP(next) != EOS) + ln--; + } REGCP_SET; if (paren) { while (n >= ln) { @@ -3481,8 +3606,7 @@ S_reginclassutf8(pTHX_ regnode *f, U8 *p) if (swash_fetch(sv, p)) match = TRUE; else if (flags & ANYOF_FOLD) { - I32 cf; - U8 tmpbuf[10]; + U8 tmpbuf[UTF8_MAXLEN]; if (flags & ANYOF_LOCALE) { PL_reg_flags |= RF_tainted; uv_to_utf8(tmpbuf, toLOWER_LC_utf8(p)); @@ -3549,7 +3673,6 @@ S_reghopmaybe(pTHX_ U8* s, I32 off) } #ifdef PERL_OBJECT -#define NO_XSLOCKS #include "XSUB.h" #endif